Move core/src/ up to core/.

This CL moves the core/src/ files up to core/ and fixes up the include guards,
includes and build files.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1800523005 .

9 files changed, 6982 insertions, 0 deletions

diff --git a/core/fpdfapi/fpdf_render/fpdf_render.cpp b/core/fpdfapi/fpdf_render/fpdf_render.cpp
new file mode 100644
index 0000000000..2b82ed4cc6
--- /dev/null
+++ b/core/fpdfapi/fpdf_render/fpdf_render.cpp
@@ -0,0 +1,1337 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfapi/fpdf_render/render_int.h"
+
+#include "core/fpdfapi/fpdf_page/pageint.h"
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_dictionary.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/fpdf_module.h"
+#include "core/include/fpdfapi/fpdf_render.h"
+#include "core/include/fxge/fx_ge.h"
+
+CPDF_DocRenderData::CPDF_DocRenderData(CPDF_Document* pPDFDoc)
+    : m_pPDFDoc(pPDFDoc), m_pFontCache(new CFX_FontCache) {}
+
+CPDF_DocRenderData::~CPDF_DocRenderData() {
+  Clear(TRUE);
+}
+
+void CPDF_DocRenderData::Clear(FX_BOOL bRelease) {
+  for (auto it = m_Type3FaceMap.begin(); it != m_Type3FaceMap.end();) {
+    auto curr_it = it++;
+    CPDF_CountedObject<CPDF_Type3Cache>* cache = curr_it->second;
+    if (bRelease || cache->use_count() < 2) {
+      delete cache->get();
+      delete cache;
+      m_Type3FaceMap.erase(curr_it);
+    }
+  }
+
+  for (auto it = m_TransferFuncMap.begin(); it != m_TransferFuncMap.end();) {
+    auto curr_it = it++;
+    CPDF_CountedObject<CPDF_TransferFunc>* value = curr_it->second;
+    if (bRelease || value->use_count() < 2) {
+      delete value->get();
+      delete value;
+      m_TransferFuncMap.erase(curr_it);
+    }
+  }
+
+  if (m_pFontCache) {
+    if (bRelease) {
+      delete m_pFontCache;
+      m_pFontCache = NULL;
+    } else {
+      m_pFontCache->FreeCache(FALSE);
+    }
+  }
+}
+
+CPDF_Type3Cache* CPDF_DocRenderData::GetCachedType3(CPDF_Type3Font* pFont) {
+  CPDF_CountedObject<CPDF_Type3Cache>* pCache;
+  auto it = m_Type3FaceMap.find(pFont);
+  if (it == m_Type3FaceMap.end()) {
+    CPDF_Type3Cache* pType3 = new CPDF_Type3Cache(pFont);
+    pCache = new CPDF_CountedObject<CPDF_Type3Cache>(pType3);
+    m_Type3FaceMap[pFont] = pCache;
+  } else {
+    pCache = it->second;
+  }
+  return pCache->AddRef();
+}
+
+void CPDF_DocRenderData::ReleaseCachedType3(CPDF_Type3Font* pFont) {
+  auto it = m_Type3FaceMap.find(pFont);
+  if (it != m_Type3FaceMap.end())
+    it->second->RemoveRef();
+}
+
+class CPDF_RenderModule : public IPDF_RenderModule {
+ public:
+  CPDF_RenderModule() {}
+
+ private:
+  ~CPDF_RenderModule() override {}
+
+  CPDF_DocRenderData* CreateDocData(CPDF_Document* pDoc) override;
+  void DestroyDocData(CPDF_DocRenderData* p) override;
+  void ClearDocData(CPDF_DocRenderData* p) override;
+
+  CPDF_DocRenderData* GetRenderData() override { return &m_RenderData; }
+
+  CPDF_PageRenderCache* CreatePageCache(CPDF_Page* pPage) override {
+    return new CPDF_PageRenderCache(pPage);
+  }
+
+  void DestroyPageCache(CPDF_PageRenderCache* pCache) override;
+
+  CPDF_DocRenderData m_RenderData;
+};
+
+CPDF_DocRenderData* CPDF_RenderModule::CreateDocData(CPDF_Document* pDoc) {
+  return new CPDF_DocRenderData(pDoc);
+}
+void CPDF_RenderModule::DestroyDocData(CPDF_DocRenderData* pDocData) {
+  delete pDocData;
+}
+void CPDF_RenderModule::ClearDocData(CPDF_DocRenderData* p) {
+  if (p) {
+    p->Clear(FALSE);
+  }
+}
+void CPDF_RenderModule::DestroyPageCache(CPDF_PageRenderCache* pCache) {
+  delete pCache;
+}
+
+void CPDF_ModuleMgr::InitRenderModule() {
+  m_pRenderModule.reset(new CPDF_RenderModule);
+}
+
+CPDF_RenderOptions::CPDF_RenderOptions()
+    : m_ColorMode(RENDER_COLOR_NORMAL),
+      m_Flags(RENDER_CLEARTYPE),
+      m_Interpolation(0),
+      m_AddFlags(0),
+      m_pOCContext(NULL),
+      m_dwLimitCacheSize(1024 * 1024 * 100),
+      m_HalftoneLimit(-1) {}
+FX_ARGB CPDF_RenderOptions::TranslateColor(FX_ARGB argb) const {
+  if (m_ColorMode == RENDER_COLOR_NORMAL) {
+    return argb;
+  }
+  if (m_ColorMode == RENDER_COLOR_ALPHA) {
+    return argb;
+  }
+  int a, r, g, b;
+  ArgbDecode(argb, a, r, g, b);
+  int gray = FXRGB2GRAY(r, g, b);
+  if (m_ColorMode == RENDER_COLOR_TWOCOLOR) {
+    int color = (r - gray) * (r - gray) + (g - gray) * (g - gray) +
+                (b - gray) * (b - gray);
+    if (gray < 35 && color < 20) {
+      return ArgbEncode(a, m_ForeColor);
+    }
+    if (gray > 221 && color < 20) {
+      return ArgbEncode(a, m_BackColor);
+    }
+    return argb;
+  }
+  int fr = FXSYS_GetRValue(m_ForeColor);
+  int fg = FXSYS_GetGValue(m_ForeColor);
+  int fb = FXSYS_GetBValue(m_ForeColor);
+  int br = FXSYS_GetRValue(m_BackColor);
+  int bg = FXSYS_GetGValue(m_BackColor);
+  int bb = FXSYS_GetBValue(m_BackColor);
+  r = (br - fr) * gray / 255 + fr;
+  g = (bg - fg) * gray / 255 + fg;
+  b = (bb - fb) * gray / 255 + fb;
+  return ArgbEncode(a, r, g, b);
+}
+
+// static
+int CPDF_RenderStatus::s_CurrentRecursionDepth = 0;
+
+CPDF_RenderStatus::CPDF_RenderStatus()
+    : m_pFormResource(nullptr),
+      m_pPageResource(nullptr),
+      m_pContext(nullptr),
+      m_bStopped(FALSE),
+      m_pDevice(nullptr),
+      m_pCurObj(nullptr),
+      m_pStopObj(nullptr),
+      m_HalftoneLimit(0),
+      m_bPrint(FALSE),
+      m_Transparency(0),
+      m_DitherBits(0),
+      m_bDropObjects(FALSE),
+      m_bStdCS(FALSE),
+      m_GroupFamily(0),
+      m_bLoadMask(FALSE),
+      m_pType3Char(nullptr),
+      m_T3FillColor(0),
+      m_curBlend(FXDIB_BLEND_NORMAL) {}
+
+CPDF_RenderStatus::~CPDF_RenderStatus() {}
+
+FX_BOOL CPDF_RenderStatus::Initialize(CPDF_RenderContext* pContext,
+                                      CFX_RenderDevice* pDevice,
+                                      const CFX_Matrix* pDeviceMatrix,
+                                      const CPDF_PageObject* pStopObj,
+                                      const CPDF_RenderStatus* pParentState,
+                                      const CPDF_GraphicStates* pInitialStates,
+                                      const CPDF_RenderOptions* pOptions,
+                                      int transparency,
+                                      FX_BOOL bDropObjects,
+                                      CPDF_Dictionary* pFormResource,
+                                      FX_BOOL bStdCS,
+                                      CPDF_Type3Char* pType3Char,
+                                      FX_ARGB fill_color,
+                                      FX_DWORD GroupFamily,
+                                      FX_BOOL bLoadMask) {
+  m_pContext = pContext;
+  m_pDevice = pDevice;
+  m_DitherBits = pDevice->GetDeviceCaps(FXDC_DITHER_BITS);
+  m_bPrint = m_pDevice->GetDeviceClass() != FXDC_DISPLAY;
+  if (pDeviceMatrix) {
+    m_DeviceMatrix = *pDeviceMatrix;
+  }
+  m_pStopObj = pStopObj;
+  if (pOptions) {
+    m_Options = *pOptions;
+  }
+  m_bDropObjects = bDropObjects;
+  m_bStdCS = bStdCS;
+  m_T3FillColor = fill_color;
+  m_pType3Char = pType3Char;
+  m_GroupFamily = GroupFamily;
+  m_bLoadMask = bLoadMask;
+  m_pFormResource = pFormResource;
+  m_pPageResource = m_pContext->GetPageResources();
+  if (pInitialStates && !m_pType3Char) {
+    m_InitialStates.CopyStates(*pInitialStates);
+    if (pParentState) {
+      CPDF_ColorStateData* pColorData =
+          (CPDF_ColorStateData*)(const CPDF_ColorStateData*)
+              m_InitialStates.m_ColorState;
+      CPDF_ColorStateData* pParentData =
+          (CPDF_ColorStateData*)(const CPDF_ColorStateData*)
+              pParentState->m_InitialStates.m_ColorState;
+      if (!pColorData || pColorData->m_FillColor.IsNull()) {
+        CPDF_ColorStateData* pData = m_InitialStates.m_ColorState.GetModify();
+        pData->m_FillRGB = pParentData->m_FillRGB;
+        pData->m_FillColor.Copy(&pParentData->m_FillColor);
+      }
+      if (!pColorData || pColorData->m_StrokeColor.IsNull()) {
+        CPDF_ColorStateData* pData = m_InitialStates.m_ColorState.GetModify();
+        pData->m_StrokeRGB = pParentData->m_FillRGB;
+        pData->m_StrokeColor.Copy(&pParentData->m_StrokeColor);
+      }
+    }
+  } else {
+    m_InitialStates.DefaultStates();
+  }
+  m_pObjectRenderer.reset();
+  m_Transparency = transparency;
+  return TRUE;
+}
+void CPDF_RenderStatus::RenderObjectList(
+    const CPDF_PageObjectHolder* pObjectHolder,
+    const CFX_Matrix* pObj2Device) {
+  CFX_FloatRect clip_rect(m_pDevice->GetClipBox());
+  CFX_Matrix device2object;
+  device2object.SetReverse(*pObj2Device);
+  device2object.TransformRect(clip_rect);
+
+  for (const auto& pCurObj : *pObjectHolder->GetPageObjectList()) {
+    if (pCurObj.get() == m_pStopObj) {
+      m_bStopped = TRUE;
+      return;
+    }
+    if (!pCurObj)
+      continue;
+
+    if (pCurObj->m_Left > clip_rect.right ||
+        pCurObj->m_Right < clip_rect.left ||
+        pCurObj->m_Bottom > clip_rect.top ||
+        pCurObj->m_Top < clip_rect.bottom) {
+      continue;
+    }
+    RenderSingleObject(pCurObj.get(), pObj2Device);
+    if (m_bStopped)
+      return;
+  }
+}
+void CPDF_RenderStatus::RenderSingleObject(const CPDF_PageObject* pObj,
+                                           const CFX_Matrix* pObj2Device) {
+  CFX_AutoRestorer<int> restorer(&s_CurrentRecursionDepth);
+  if (++s_CurrentRecursionDepth > kRenderMaxRecursionDepth) {
+    return;
+  }
+  m_pCurObj = pObj;
+  if (m_Options.m_pOCContext && pObj->m_ContentMark.NotNull()) {
+    if (!m_Options.m_pOCContext->CheckObjectVisible(pObj)) {
+      return;
+    }
+  }
+  ProcessClipPath(pObj->m_ClipPath, pObj2Device);
+  if (ProcessTransparency(pObj, pObj2Device)) {
+    return;
+  }
+  ProcessObjectNoClip(pObj, pObj2Device);
+}
+
+FX_BOOL CPDF_RenderStatus::ContinueSingleObject(const CPDF_PageObject* pObj,
+                                                const CFX_Matrix* pObj2Device,
+                                                IFX_Pause* pPause) {
+  if (m_pObjectRenderer) {
+    if (m_pObjectRenderer->Continue(pPause))
+      return TRUE;
+
+    if (!m_pObjectRenderer->m_Result)
+      DrawObjWithBackground(pObj, pObj2Device);
+    m_pObjectRenderer.reset();
+    return FALSE;
+  }
+
+  m_pCurObj = pObj;
+  if (m_Options.m_pOCContext && pObj->m_ContentMark.NotNull() &&
+      !m_Options.m_pOCContext->CheckObjectVisible(pObj)) {
+    return FALSE;
+  }
+
+  ProcessClipPath(pObj->m_ClipPath, pObj2Device);
+  if (ProcessTransparency(pObj, pObj2Device))
+    return FALSE;
+
+  if (pObj->IsImage()) {
+    m_pObjectRenderer.reset(IPDF_ObjectRenderer::Create());
+    if (!m_pObjectRenderer->Start(this, pObj, pObj2Device, FALSE)) {
+      if (!m_pObjectRenderer->m_Result)
+        DrawObjWithBackground(pObj, pObj2Device);
+      m_pObjectRenderer.reset();
+      return FALSE;
+    }
+    return ContinueSingleObject(pObj, pObj2Device, pPause);
+  }
+
+  ProcessObjectNoClip(pObj, pObj2Device);
+  return FALSE;
+}
+
+IPDF_ObjectRenderer* IPDF_ObjectRenderer::Create() {
+  return new CPDF_ImageRenderer;
+}
+
+FX_BOOL CPDF_RenderStatus::GetObjectClippedRect(const CPDF_PageObject* pObj,
+                                                const CFX_Matrix* pObj2Device,
+                                                FX_BOOL bLogical,
+                                                FX_RECT& rect) const {
+  rect = pObj->GetBBox(pObj2Device);
+  FX_RECT rtClip = m_pDevice->GetClipBox();
+  if (!bLogical) {
+    CFX_Matrix dCTM = m_pDevice->GetCTM();
+    FX_FLOAT a = FXSYS_fabs(dCTM.a);
+    FX_FLOAT d = FXSYS_fabs(dCTM.d);
+    if (a != 1.0f || d != 1.0f) {
+      rect.right = rect.left + (int32_t)FXSYS_ceil((FX_FLOAT)rect.Width() * a);
+      rect.bottom = rect.top + (int32_t)FXSYS_ceil((FX_FLOAT)rect.Height() * d);
+      rtClip.right =
+          rtClip.left + (int32_t)FXSYS_ceil((FX_FLOAT)rtClip.Width() * a);
+      rtClip.bottom =
+          rtClip.top + (int32_t)FXSYS_ceil((FX_FLOAT)rtClip.Height() * d);
+    }
+  }
+  rect.Intersect(rtClip);
+  return rect.IsEmpty();
+}
+void CPDF_RenderStatus::DitherObjectArea(const CPDF_PageObject* pObj,
+                                         const CFX_Matrix* pObj2Device) {
+  CFX_DIBitmap* pBitmap = m_pDevice->GetBitmap();
+  if (!pBitmap) {
+    return;
+  }
+  FX_RECT rect;
+  if (GetObjectClippedRect(pObj, pObj2Device, FALSE, rect)) {
+    return;
+  }
+  if (m_DitherBits == 2) {
+    static FX_ARGB pal[4] = {0, 85, 170, 255};
+    pBitmap->DitherFS(pal, 4, &rect);
+  } else if (m_DitherBits == 3) {
+    static FX_ARGB pal[8] = {0, 36, 73, 109, 146, 182, 219, 255};
+    pBitmap->DitherFS(pal, 8, &rect);
+  } else if (m_DitherBits == 4) {
+    static FX_ARGB pal[16] = {0,   17,  34,  51,  68,  85,  102, 119,
+                              136, 153, 170, 187, 204, 221, 238, 255};
+    pBitmap->DitherFS(pal, 16, &rect);
+  }
+}
+void CPDF_RenderStatus::ProcessObjectNoClip(const CPDF_PageObject* pObj,
+                                            const CFX_Matrix* pObj2Device) {
+  FX_BOOL bRet = FALSE;
+  switch (pObj->GetType()) {
+    case CPDF_PageObject::TEXT:
+      bRet = ProcessText(pObj->AsText(), pObj2Device, NULL);
+      break;
+    case CPDF_PageObject::PATH:
+      bRet = ProcessPath(pObj->AsPath(), pObj2Device);
+      break;
+    case CPDF_PageObject::IMAGE:
+      bRet = ProcessImage(pObj->AsImage(), pObj2Device);
+      break;
+    case CPDF_PageObject::SHADING:
+      bRet = ProcessShading(pObj->AsShading(), pObj2Device);
+      break;
+    case CPDF_PageObject::FORM:
+      bRet = ProcessForm(pObj->AsForm(), pObj2Device);
+      break;
+  }
+  if (!bRet) {
+    DrawObjWithBackground(pObj, pObj2Device);
+  }
+}
+FX_BOOL CPDF_RenderStatus::DrawObjWithBlend(const CPDF_PageObject* pObj,
+                                            const CFX_Matrix* pObj2Device) {
+  FX_BOOL bRet = FALSE;
+  switch (pObj->GetType()) {
+    case CPDF_PageObject::PATH:
+      bRet = ProcessPath(pObj->AsPath(), pObj2Device);
+      break;
+    case CPDF_PageObject::IMAGE:
+      bRet = ProcessImage(pObj->AsImage(), pObj2Device);
+      break;
+    case CPDF_PageObject::FORM:
+      bRet = ProcessForm(pObj->AsForm(), pObj2Device);
+      break;
+    default:
+      break;
+  }
+  return bRet;
+}
+void CPDF_RenderStatus::GetScaledMatrix(CFX_Matrix& matrix) const {
+  CFX_Matrix dCTM = m_pDevice->GetCTM();
+  matrix.a *= FXSYS_fabs(dCTM.a);
+  matrix.d *= FXSYS_fabs(dCTM.d);
+}
+void CPDF_RenderStatus::DrawObjWithBackground(const CPDF_PageObject* pObj,
+                                              const CFX_Matrix* pObj2Device) {
+  FX_RECT rect;
+  if (GetObjectClippedRect(pObj, pObj2Device, FALSE, rect)) {
+    return;
+  }
+  int res = 300;
+  if (pObj->IsImage() &&
+      m_pDevice->GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER) {
+    res = 0;
+  }
+  CPDF_ScaledRenderBuffer buffer;
+  if (!buffer.Initialize(m_pContext, m_pDevice, rect, pObj, &m_Options, res)) {
+    return;
+  }
+  CFX_Matrix matrix = *pObj2Device;
+  matrix.Concat(*buffer.GetMatrix());
+  GetScaledMatrix(matrix);
+  CPDF_Dictionary* pFormResource = NULL;
+  if (pObj->IsForm()) {
+    const CPDF_FormObject* pFormObj = pObj->AsForm();
+    if (pFormObj->m_pForm && pFormObj->m_pForm->m_pFormDict) {
+      pFormResource = pFormObj->m_pForm->m_pFormDict->GetDictBy("Resources");
+    }
+  }
+  CPDF_RenderStatus status;
+  status.Initialize(m_pContext, buffer.GetDevice(), buffer.GetMatrix(), NULL,
+                    NULL, NULL, &m_Options, m_Transparency, m_bDropObjects,
+                    pFormResource);
+  status.RenderSingleObject(pObj, &matrix);
+  buffer.OutputToDevice();
+}
+FX_BOOL CPDF_RenderStatus::ProcessForm(const CPDF_FormObject* pFormObj,
+                                       const CFX_Matrix* pObj2Device) {
+  CPDF_Dictionary* pOC = pFormObj->m_pForm->m_pFormDict->GetDictBy("OC");
+  if (pOC && m_Options.m_pOCContext &&
+      !m_Options.m_pOCContext->CheckOCGVisible(pOC)) {
+    return TRUE;
+  }
+  CFX_Matrix matrix = pFormObj->m_FormMatrix;
+  matrix.Concat(*pObj2Device);
+  CPDF_Dictionary* pResources = NULL;
+  if (pFormObj->m_pForm && pFormObj->m_pForm->m_pFormDict) {
+    pResources = pFormObj->m_pForm->m_pFormDict->GetDictBy("Resources");
+  }
+  CPDF_RenderStatus status;
+  status.Initialize(m_pContext, m_pDevice, NULL, m_pStopObj, this, pFormObj,
+                    &m_Options, m_Transparency, m_bDropObjects, pResources,
+                    FALSE);
+  status.m_curBlend = m_curBlend;
+  m_pDevice->SaveState();
+  status.RenderObjectList(pFormObj->m_pForm, &matrix);
+  m_bStopped = status.m_bStopped;
+  m_pDevice->RestoreState();
+  return TRUE;
+}
+FX_BOOL IsAvailableMatrix(const CFX_Matrix& matrix) {
+  if (matrix.a == 0 || matrix.d == 0) {
+    return matrix.b != 0 && matrix.c != 0;
+  }
+  if (matrix.b == 0 || matrix.c == 0) {
+    return matrix.a != 0 && matrix.d != 0;
+  }
+  return TRUE;
+}
+FX_BOOL CPDF_RenderStatus::ProcessPath(const CPDF_PathObject* pPathObj,
+                                       const CFX_Matrix* pObj2Device) {
+  int FillType = pPathObj->m_FillType;
+  FX_BOOL bStroke = pPathObj->m_bStroke;
+  ProcessPathPattern(pPathObj, pObj2Device, FillType, bStroke);
+  if (FillType == 0 && !bStroke) {
+    return TRUE;
+  }
+  FX_DWORD fill_argb = 0;
+  if (FillType) {
+    fill_argb = GetFillArgb(pPathObj);
+  }
+  FX_DWORD stroke_argb = 0;
+  if (bStroke) {
+    stroke_argb = GetStrokeArgb(pPathObj);
+  }
+  CFX_Matrix path_matrix = pPathObj->m_Matrix;
+  path_matrix.Concat(*pObj2Device);
+  if (!IsAvailableMatrix(path_matrix)) {
+    return TRUE;
+  }
+  if (FillType && (m_Options.m_Flags & RENDER_RECT_AA)) {
+    FillType |= FXFILL_RECT_AA;
+  }
+  if (m_Options.m_Flags & RENDER_FILL_FULLCOVER) {
+    FillType |= FXFILL_FULLCOVER;
+  }
+  if (m_Options.m_Flags & RENDER_NOPATHSMOOTH) {
+    FillType |= FXFILL_NOPATHSMOOTH;
+  }
+  if (bStroke) {
+    FillType |= FX_FILL_STROKE;
+  }
+  const CPDF_GeneralStateData* pGeneralData =
+      ((CPDF_PageObject*)pPathObj)->m_GeneralState;
+  if (pGeneralData && pGeneralData->m_StrokeAdjust) {
+    FillType |= FX_STROKE_ADJUST;
+  }
+  if (m_pType3Char) {
+    FillType |= FX_FILL_TEXT_MODE;
+  }
+  CFX_GraphStateData graphState(*pPathObj->m_GraphState);
+  if (m_Options.m_Flags & RENDER_THINLINE) {
+    graphState.m_LineWidth = 0;
+  }
+  return m_pDevice->DrawPath(pPathObj->m_Path, &path_matrix, &graphState,
+                             fill_argb, stroke_argb, FillType, 0, NULL,
+                             m_curBlend);
+}
+CPDF_TransferFunc* CPDF_RenderStatus::GetTransferFunc(CPDF_Object* pObj) const {
+  ASSERT(pObj);
+  CPDF_DocRenderData* pDocCache = m_pContext->GetDocument()->GetRenderData();
+  return pDocCache ? pDocCache->GetTransferFunc(pObj) : nullptr;
+}
+FX_ARGB CPDF_RenderStatus::GetFillArgb(const CPDF_PageObject* pObj,
+                                       FX_BOOL bType3) const {
+  CPDF_ColorStateData* pColorData =
+      (CPDF_ColorStateData*)(const CPDF_ColorStateData*)pObj->m_ColorState;
+  if (m_pType3Char && !bType3 &&
+      (!m_pType3Char->m_bColored ||
+       (m_pType3Char->m_bColored &&
+        (!pColorData || pColorData->m_FillColor.IsNull())))) {
+    return m_T3FillColor;
+  }
+  if (!pColorData || pColorData->m_FillColor.IsNull()) {
+    pColorData = (CPDF_ColorStateData*)(const CPDF_ColorStateData*)
+                     m_InitialStates.m_ColorState;
+  }
+  FX_COLORREF rgb = pColorData->m_FillRGB;
+  if (rgb == (FX_DWORD)-1) {
+    return 0;
+  }
+  const CPDF_GeneralStateData* pGeneralData = pObj->m_GeneralState;
+  int alpha;
+  if (pGeneralData) {
+    alpha = (int32_t)(pGeneralData->m_FillAlpha * 255);
+    if (pGeneralData->m_pTR) {
+      if (!pGeneralData->m_pTransferFunc) {
+        ((CPDF_GeneralStateData*)pGeneralData)->m_pTransferFunc =
+            GetTransferFunc(pGeneralData->m_pTR);
+      }
+      if (pGeneralData->m_pTransferFunc) {
+        rgb = pGeneralData->m_pTransferFunc->TranslateColor(rgb);
+      }
+    }
+  } else {
+    alpha = 255;
+  }
+  return m_Options.TranslateColor(ArgbEncode(alpha, rgb));
+}
+FX_ARGB CPDF_RenderStatus::GetStrokeArgb(const CPDF_PageObject* pObj) const {
+  CPDF_ColorStateData* pColorData =
+      (CPDF_ColorStateData*)(const CPDF_ColorStateData*)pObj->m_ColorState;
+  if (m_pType3Char && (!m_pType3Char->m_bColored ||
+                       (m_pType3Char->m_bColored &&
+                        (!pColorData || pColorData->m_StrokeColor.IsNull())))) {
+    return m_T3FillColor;
+  }
+  if (!pColorData || pColorData->m_StrokeColor.IsNull()) {
+    pColorData = (CPDF_ColorStateData*)(const CPDF_ColorStateData*)
+                     m_InitialStates.m_ColorState;
+  }
+  FX_COLORREF rgb = pColorData->m_StrokeRGB;
+  if (rgb == (FX_DWORD)-1) {
+    return 0;
+  }
+  const CPDF_GeneralStateData* pGeneralData = pObj->m_GeneralState;
+  int alpha;
+  if (pGeneralData) {
+    alpha = (int32_t)(pGeneralData->m_StrokeAlpha * 255);
+    if (pGeneralData->m_pTR) {
+      if (!pGeneralData->m_pTransferFunc) {
+        ((CPDF_GeneralStateData*)pGeneralData)->m_pTransferFunc =
+            GetTransferFunc(pGeneralData->m_pTR);
+      }
+      if (pGeneralData->m_pTransferFunc) {
+        rgb = pGeneralData->m_pTransferFunc->TranslateColor(rgb);
+      }
+    }
+  } else {
+    alpha = 255;
+  }
+  return m_Options.TranslateColor(ArgbEncode(alpha, rgb));
+}
+void CPDF_RenderStatus::ProcessClipPath(CPDF_ClipPath ClipPath,
+                                        const CFX_Matrix* pObj2Device) {
+  if (ClipPath.IsNull()) {
+    if (!m_LastClipPath.IsNull()) {
+      m_pDevice->RestoreState(TRUE);
+      m_LastClipPath.SetNull();
+    }
+    return;
+  }
+  if (m_LastClipPath == ClipPath)
+    return;
+
+  m_LastClipPath = ClipPath;
+  m_pDevice->RestoreState(TRUE);
+  int nClipPath = ClipPath.GetPathCount();
+  for (int i = 0; i < nClipPath; ++i) {
+    const CFX_PathData* pPathData = ClipPath.GetPath(i);
+    if (!pPathData)
+      continue;
+
+    if (pPathData->GetPointCount() == 0) {
+      CFX_PathData EmptyPath;
+      EmptyPath.AppendRect(-1, -1, 0, 0);
+      int fill_mode = FXFILL_WINDING;
+      m_pDevice->SetClip_PathFill(&EmptyPath, nullptr, fill_mode);
+    } else {
+      int ClipType = ClipPath.GetClipType(i);
+      m_pDevice->SetClip_PathFill(pPathData, pObj2Device, ClipType);
+    }
+  }
+  int textcount = ClipPath.GetTextCount();
+  if (textcount == 0)
+    return;
+
+  if (m_pDevice->GetDeviceClass() == FXDC_DISPLAY &&
+      !(m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SOFT_CLIP)) {
+    return;
+  }
+
+  std::unique_ptr<CFX_PathData> pTextClippingPath;
+  for (int i = 0; i < textcount; ++i) {
+    CPDF_TextObject* pText = ClipPath.GetText(i);
+    if (pText) {
+      if (!pTextClippingPath)
+        pTextClippingPath.reset(new CFX_PathData);
+      ProcessText(pText, pObj2Device, pTextClippingPath.get());
+      continue;
+    }
+
+    if (!pTextClippingPath)
+      continue;
+
+    int fill_mode = FXFILL_WINDING;
+    if (m_Options.m_Flags & RENDER_NOTEXTSMOOTH)
+      fill_mode |= FXFILL_NOPATHSMOOTH;
+    m_pDevice->SetClip_PathFill(pTextClippingPath.get(), nullptr, fill_mode);
+    pTextClippingPath.reset();
+  }
+}
+
+void CPDF_RenderStatus::DrawClipPath(CPDF_ClipPath ClipPath,
+                                     const CFX_Matrix* pObj2Device) {
+  if (ClipPath.IsNull()) {
+    return;
+  }
+  int fill_mode = 0;
+  if (m_Options.m_Flags & RENDER_NOPATHSMOOTH) {
+    fill_mode |= FXFILL_NOPATHSMOOTH;
+  }
+  int nClipPath = ClipPath.GetPathCount();
+  int i;
+  for (i = 0; i < nClipPath; i++) {
+    const CFX_PathData* pPathData = ClipPath.GetPath(i);
+    if (!pPathData) {
+      continue;
+    }
+    CFX_GraphStateData stroke_state;
+    if (m_Options.m_Flags & RENDER_THINLINE) {
+      stroke_state.m_LineWidth = 0;
+    }
+    m_pDevice->DrawPath(pPathData, pObj2Device, &stroke_state, 0, 0xffff0000,
+                        fill_mode);
+  }
+}
+FX_BOOL CPDF_RenderStatus::SelectClipPath(const CPDF_PathObject* pPathObj,
+                                          const CFX_Matrix* pObj2Device,
+                                          FX_BOOL bStroke) {
+  CFX_Matrix path_matrix = pPathObj->m_Matrix;
+  path_matrix.Concat(*pObj2Device);
+  if (bStroke) {
+    CFX_GraphStateData graphState(*pPathObj->m_GraphState);
+    if (m_Options.m_Flags & RENDER_THINLINE) {
+      graphState.m_LineWidth = 0;
+    }
+    return m_pDevice->SetClip_PathStroke(pPathObj->m_Path, &path_matrix,
+                                         &graphState);
+  }
+  int fill_mode = pPathObj->m_FillType;
+  if (m_Options.m_Flags & RENDER_NOPATHSMOOTH) {
+    fill_mode |= FXFILL_NOPATHSMOOTH;
+  }
+  return m_pDevice->SetClip_PathFill(pPathObj->m_Path, &path_matrix, fill_mode);
+}
+FX_BOOL CPDF_RenderStatus::ProcessTransparency(const CPDF_PageObject* pPageObj,
+                                               const CFX_Matrix* pObj2Device) {
+  const CPDF_GeneralStateData* pGeneralState = pPageObj->m_GeneralState;
+  int blend_type =
+      pGeneralState ? pGeneralState->m_BlendType : FXDIB_BLEND_NORMAL;
+  if (blend_type == FXDIB_BLEND_UNSUPPORTED) {
+    return TRUE;
+  }
+  CPDF_Dictionary* pSMaskDict =
+      pGeneralState ? ToDictionary(pGeneralState->m_pSoftMask) : NULL;
+  if (pSMaskDict) {
+    if (pPageObj->IsImage() &&
+        pPageObj->AsImage()->m_pImage->GetDict()->KeyExist("SMask")) {
+      pSMaskDict = NULL;
+    }
+  }
+  CPDF_Dictionary* pFormResource = NULL;
+  FX_FLOAT group_alpha = 1.0f;
+  int Transparency = m_Transparency;
+  FX_BOOL bGroupTransparent = FALSE;
+  if (pPageObj->IsForm()) {
+    const CPDF_FormObject* pFormObj = pPageObj->AsForm();
+    const CPDF_GeneralStateData* pStateData =
+        pFormObj->m_GeneralState.GetObject();
+    if (pStateData) {
+      group_alpha = pStateData->m_FillAlpha;
+    }
+    Transparency = pFormObj->m_pForm->m_Transparency;
+    bGroupTransparent = !!(Transparency & PDFTRANS_ISOLATED);
+    if (pFormObj->m_pForm->m_pFormDict) {
+      pFormResource = pFormObj->m_pForm->m_pFormDict->GetDictBy("Resources");
+    }
+  }
+  FX_BOOL bTextClip = FALSE;
+  if (pPageObj->m_ClipPath.NotNull() && pPageObj->m_ClipPath.GetTextCount() &&
+      m_pDevice->GetDeviceClass() == FXDC_DISPLAY &&
+      !(m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SOFT_CLIP)) {
+    bTextClip = TRUE;
+  }
+  if ((m_Options.m_Flags & RENDER_OVERPRINT) && pPageObj->IsImage() &&
+      pGeneralState && pGeneralState->m_FillOP && pGeneralState->m_StrokeOP) {
+    CPDF_Document* pDocument = NULL;
+    CPDF_Page* pPage = NULL;
+    if (m_pContext->GetPageCache()) {
+      pPage = m_pContext->GetPageCache()->GetPage();
+      pDocument = pPage->m_pDocument;
+    } else {
+      pDocument = pPageObj->AsImage()->m_pImage->GetDocument();
+    }
+    CPDF_Dictionary* pPageResources = pPage ? pPage->m_pPageResources : NULL;
+    CPDF_Object* pCSObj =
+        pPageObj->AsImage()->m_pImage->GetStream()->GetDict()->GetElementValue(
+            "ColorSpace");
+    CPDF_ColorSpace* pColorSpace =
+        pDocument->LoadColorSpace(pCSObj, pPageResources);
+    if (pColorSpace) {
+      int format = pColorSpace->GetFamily();
+      if (format == PDFCS_DEVICECMYK || format == PDFCS_SEPARATION ||
+          format == PDFCS_DEVICEN) {
+        blend_type = FXDIB_BLEND_DARKEN;
+      }
+      pDocument->GetPageData()->ReleaseColorSpace(pCSObj);
+    }
+  }
+  if (!pSMaskDict && group_alpha == 1.0f && blend_type == FXDIB_BLEND_NORMAL &&
+      !bTextClip && !bGroupTransparent) {
+    return FALSE;
+  }
+  FX_BOOL isolated = Transparency & PDFTRANS_ISOLATED;
+  if (m_bPrint) {
+    FX_BOOL bRet = FALSE;
+    int rendCaps = m_pDevice->GetRenderCaps();
+    if (!((Transparency & PDFTRANS_ISOLATED) || pSMaskDict || bTextClip) &&
+        (rendCaps & FXRC_BLEND_MODE)) {
+      int oldBlend = m_curBlend;
+      m_curBlend = blend_type;
+      bRet = DrawObjWithBlend(pPageObj, pObj2Device);
+      m_curBlend = oldBlend;
+    }
+    if (!bRet) {
+      DrawObjWithBackground(pPageObj, pObj2Device);
+    }
+    return TRUE;
+  }
+  FX_RECT rect = pPageObj->GetBBox(pObj2Device);
+  rect.Intersect(m_pDevice->GetClipBox());
+  if (rect.IsEmpty()) {
+    return TRUE;
+  }
+  CFX_Matrix deviceCTM = m_pDevice->GetCTM();
+  FX_FLOAT scaleX = FXSYS_fabs(deviceCTM.a);
+  FX_FLOAT scaleY = FXSYS_fabs(deviceCTM.d);
+  int width = FXSYS_round((FX_FLOAT)rect.Width() * scaleX);
+  int height = FXSYS_round((FX_FLOAT)rect.Height() * scaleY);
+  CFX_FxgeDevice bitmap_device;
+  std::unique_ptr<CFX_DIBitmap> oriDevice;
+  if (!isolated && (m_pDevice->GetRenderCaps() & FXRC_GET_BITS)) {
+    oriDevice.reset(new CFX_DIBitmap);
+    if (!m_pDevice->CreateCompatibleBitmap(oriDevice.get(), width, height))
+      return TRUE;
+
+    m_pDevice->GetDIBits(oriDevice.get(), rect.left, rect.top);
+  }
+  if (!bitmap_device.Create(width, height, FXDIB_Argb, 0, oriDevice.get()))
+    return TRUE;
+
+  CFX_DIBitmap* bitmap = bitmap_device.GetBitmap();
+  bitmap->Clear(0);
+  CFX_Matrix new_matrix = *pObj2Device;
+  new_matrix.TranslateI(-rect.left, -rect.top);
+  new_matrix.Scale(scaleX, scaleY);
+  std::unique_ptr<CFX_DIBitmap> pTextMask;
+  if (bTextClip) {
+    pTextMask.reset(new CFX_DIBitmap);
+    if (!pTextMask->Create(width, height, FXDIB_8bppMask))
+      return TRUE;
+
+    pTextMask->Clear(0);
+    CFX_FxgeDevice text_device;
+    text_device.Attach(pTextMask.get());
+    for (FX_DWORD i = 0; i < pPageObj->m_ClipPath.GetTextCount(); i++) {
+      CPDF_TextObject* textobj = pPageObj->m_ClipPath.GetText(i);
+      if (!textobj) {
+        break;
+      }
+      CFX_Matrix text_matrix;
+      textobj->GetTextMatrix(&text_matrix);
+      CPDF_TextRenderer::DrawTextPath(
+          &text_device, textobj->m_nChars, textobj->m_pCharCodes,
+          textobj->m_pCharPos, textobj->m_TextState.GetFont(),
+          textobj->m_TextState.GetFontSize(), &text_matrix, &new_matrix,
+          textobj->m_GraphState, (FX_ARGB)-1, 0, NULL);
+    }
+  }
+  CPDF_RenderStatus bitmap_render;
+  bitmap_render.Initialize(m_pContext, &bitmap_device, NULL, m_pStopObj, NULL,
+                           NULL, &m_Options, 0, m_bDropObjects, pFormResource,
+                           TRUE);
+  bitmap_render.ProcessObjectNoClip(pPageObj, &new_matrix);
+  m_bStopped = bitmap_render.m_bStopped;
+  if (pSMaskDict) {
+    CFX_Matrix smask_matrix;
+    FXSYS_memcpy(&smask_matrix, pGeneralState->m_SMaskMatrix,
+                 sizeof smask_matrix);
+    smask_matrix.Concat(*pObj2Device);
+    std::unique_ptr<CFX_DIBSource> pSMaskSource(
+        LoadSMask(pSMaskDict, &rect, &smask_matrix));
+    if (pSMaskSource)
+      bitmap->MultiplyAlpha(pSMaskSource.get());
+  }
+  if (pTextMask) {
+    bitmap->MultiplyAlpha(pTextMask.get());
+    pTextMask.reset();
+  }
+  if (Transparency & PDFTRANS_GROUP && group_alpha != 1.0f) {
+    bitmap->MultiplyAlpha((int32_t)(group_alpha * 255));
+  }
+  Transparency = m_Transparency;
+  if (pPageObj->IsForm()) {
+    Transparency |= PDFTRANS_GROUP;
+  }
+  CompositeDIBitmap(bitmap, rect.left, rect.top, 0, 255, blend_type,
+                    Transparency);
+  return TRUE;
+}
+
+CFX_DIBitmap* CPDF_RenderStatus::GetBackdrop(const CPDF_PageObject* pObj,
+                                             const FX_RECT& rect,
+                                             int& left,
+                                             int& top,
+                                             FX_BOOL bBackAlphaRequired) {
+  FX_RECT bbox = rect;
+  bbox.Intersect(m_pDevice->GetClipBox());
+  left = bbox.left;
+  top = bbox.top;
+  CFX_Matrix deviceCTM = m_pDevice->GetCTM();
+  FX_FLOAT scaleX = FXSYS_fabs(deviceCTM.a);
+  FX_FLOAT scaleY = FXSYS_fabs(deviceCTM.d);
+  int width = FXSYS_round(bbox.Width() * scaleX);
+  int height = FXSYS_round(bbox.Height() * scaleY);
+  std::unique_ptr<CFX_DIBitmap> pBackdrop(new CFX_DIBitmap);
+  if (bBackAlphaRequired && !m_bDropObjects)
+    pBackdrop->Create(width, height, FXDIB_Argb);
+  else
+    m_pDevice->CreateCompatibleBitmap(pBackdrop.get(), width, height);
+
+  if (!pBackdrop->GetBuffer())
+    return nullptr;
+
+  FX_BOOL bNeedDraw;
+  if (pBackdrop->HasAlpha())
+    bNeedDraw = !(m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT);
+  else
+    bNeedDraw = !(m_pDevice->GetRenderCaps() & FXRC_GET_BITS);
+
+  if (!bNeedDraw) {
+    m_pDevice->GetDIBits(pBackdrop.get(), left, top);
+    return pBackdrop.release();
+  }
+
+  CFX_Matrix FinalMatrix = m_DeviceMatrix;
+  FinalMatrix.TranslateI(-left, -top);
+  FinalMatrix.Scale(scaleX, scaleY);
+  pBackdrop->Clear(pBackdrop->HasAlpha() ? 0 : 0xffffffff);
+  CFX_FxgeDevice device;
+  device.Attach(pBackdrop.get());
+  m_pContext->Render(&device, pObj, &m_Options, &FinalMatrix);
+  return pBackdrop.release();
+}
+
+void CPDF_RenderContext::GetBackground(CFX_DIBitmap* pBuffer,
+                                       const CPDF_PageObject* pObj,
+                                       const CPDF_RenderOptions* pOptions,
+                                       CFX_Matrix* pFinalMatrix) {
+  CFX_FxgeDevice device;
+  device.Attach(pBuffer);
+
+  FX_RECT rect(0, 0, device.GetWidth(), device.GetHeight());
+  device.FillRect(&rect, 0xffffffff);
+  Render(&device, pObj, pOptions, pFinalMatrix);
+}
+CPDF_GraphicStates* CPDF_RenderStatus::CloneObjStates(
+    const CPDF_GraphicStates* pSrcStates,
+    FX_BOOL bStroke) {
+  if (!pSrcStates) {
+    return NULL;
+  }
+  CPDF_GraphicStates* pStates = new CPDF_GraphicStates;
+  pStates->CopyStates(*pSrcStates);
+  CPDF_Color* pObjColor = bStroke ? pSrcStates->m_ColorState.GetStrokeColor()
+                                  : pSrcStates->m_ColorState.GetFillColor();
+  if (!pObjColor->IsNull()) {
+    CPDF_ColorStateData* pColorData = pStates->m_ColorState.GetModify();
+    pColorData->m_FillRGB =
+        bStroke ? pSrcStates->m_ColorState.GetObject()->m_StrokeRGB
+                : pSrcStates->m_ColorState.GetObject()->m_FillRGB;
+    pColorData->m_StrokeRGB = pColorData->m_FillRGB;
+  }
+  return pStates;
+}
+
+CPDF_RenderContext::CPDF_RenderContext(CPDF_Page* pPage)
+    : m_pDocument(pPage->m_pDocument),
+      m_pPageResources(pPage->m_pPageResources),
+      m_pPageCache(pPage->GetRenderCache()),
+      m_bFirstLayer(TRUE) {}
+
+CPDF_RenderContext::CPDF_RenderContext(CPDF_Document* pDoc,
+                                       CPDF_PageRenderCache* pPageCache)
+    : m_pDocument(pDoc),
+      m_pPageResources(nullptr),
+      m_pPageCache(pPageCache),
+      m_bFirstLayer(TRUE) {}
+
+CPDF_RenderContext::~CPDF_RenderContext() {}
+
+void CPDF_RenderContext::AppendLayer(CPDF_PageObjectHolder* pObjectHolder,
+                                     const CFX_Matrix* pObject2Device) {
+  Layer* pLayer = m_Layers.AddSpace();
+  pLayer->m_pObjectHolder = pObjectHolder;
+  if (pObject2Device) {
+    pLayer->m_Matrix = *pObject2Device;
+  } else {
+    pLayer->m_Matrix.SetIdentity();
+  }
+}
+void CPDF_RenderContext::Render(CFX_RenderDevice* pDevice,
+                                const CPDF_RenderOptions* pOptions,
+                                const CFX_Matrix* pLastMatrix) {
+  Render(pDevice, NULL, pOptions, pLastMatrix);
+}
+void CPDF_RenderContext::Render(CFX_RenderDevice* pDevice,
+                                const CPDF_PageObject* pStopObj,
+                                const CPDF_RenderOptions* pOptions,
+                                const CFX_Matrix* pLastMatrix) {
+  int count = m_Layers.GetSize();
+  for (int j = 0; j < count; j++) {
+    pDevice->SaveState();
+    Layer* pLayer = m_Layers.GetDataPtr(j);
+    if (pLastMatrix) {
+      CFX_Matrix FinalMatrix = pLayer->m_Matrix;
+      FinalMatrix.Concat(*pLastMatrix);
+      CPDF_RenderStatus status;
+      status.Initialize(this, pDevice, pLastMatrix, pStopObj, NULL, NULL,
+                        pOptions, pLayer->m_pObjectHolder->m_Transparency,
+                        FALSE, NULL);
+      status.RenderObjectList(pLayer->m_pObjectHolder, &FinalMatrix);
+      if (status.m_Options.m_Flags & RENDER_LIMITEDIMAGECACHE) {
+        m_pPageCache->CacheOptimization(status.m_Options.m_dwLimitCacheSize);
+      }
+      if (status.m_bStopped) {
+        pDevice->RestoreState();
+        break;
+      }
+    } else {
+      CPDF_RenderStatus status;
+      status.Initialize(this, pDevice, NULL, pStopObj, NULL, NULL, pOptions,
+                        pLayer->m_pObjectHolder->m_Transparency, FALSE, NULL);
+      status.RenderObjectList(pLayer->m_pObjectHolder, &pLayer->m_Matrix);
+      if (status.m_Options.m_Flags & RENDER_LIMITEDIMAGECACHE) {
+        m_pPageCache->CacheOptimization(status.m_Options.m_dwLimitCacheSize);
+      }
+      if (status.m_bStopped) {
+        pDevice->RestoreState();
+        break;
+      }
+    }
+    pDevice->RestoreState();
+  }
+}
+
+CPDF_ProgressiveRenderer::CPDF_ProgressiveRenderer(
+    CPDF_RenderContext* pContext,
+    CFX_RenderDevice* pDevice,
+    const CPDF_RenderOptions* pOptions)
+    : m_Status(Ready),
+      m_pContext(pContext),
+      m_pDevice(pDevice),
+      m_pOptions(pOptions),
+      m_LayerIndex(0),
+      m_pCurrentLayer(nullptr) {}
+
+CPDF_ProgressiveRenderer::~CPDF_ProgressiveRenderer() {
+  if (m_pRenderStatus)
+    m_pDevice->RestoreState();
+}
+
+void CPDF_ProgressiveRenderer::Start(IFX_Pause* pPause) {
+  if (!m_pContext || !m_pDevice || m_Status != Ready) {
+    m_Status = Failed;
+    return;
+  }
+  m_Status = ToBeContinued;
+  Continue(pPause);
+}
+
+void CPDF_ProgressiveRenderer::Continue(IFX_Pause* pPause) {
+  while (m_Status == ToBeContinued) {
+    if (!m_pCurrentLayer) {
+      if (m_LayerIndex >= m_pContext->CountLayers()) {
+        m_Status = Done;
+        return;
+      }
+      m_pCurrentLayer = m_pContext->GetLayer(m_LayerIndex);
+      m_LastObjectRendered =
+          m_pCurrentLayer->m_pObjectHolder->GetPageObjectList()->end();
+      m_pRenderStatus.reset(new CPDF_RenderStatus());
+      m_pRenderStatus->Initialize(
+          m_pContext, m_pDevice, NULL, NULL, NULL, NULL, m_pOptions,
+          m_pCurrentLayer->m_pObjectHolder->m_Transparency, FALSE, NULL);
+      m_pDevice->SaveState();
+      m_ClipRect = CFX_FloatRect(m_pDevice->GetClipBox());
+      CFX_Matrix device2object;
+      device2object.SetReverse(m_pCurrentLayer->m_Matrix);
+      device2object.TransformRect(m_ClipRect);
+    }
+    CPDF_PageObjectList::iterator iter;
+    CPDF_PageObjectList::iterator iterEnd =
+        m_pCurrentLayer->m_pObjectHolder->GetPageObjectList()->end();
+    if (m_LastObjectRendered != iterEnd) {
+      iter = m_LastObjectRendered;
+      ++iter;
+    } else {
+      iter = m_pCurrentLayer->m_pObjectHolder->GetPageObjectList()->begin();
+    }
+    int nObjsToGo = kStepLimit;
+    while (iter != iterEnd) {
+      CPDF_PageObject* pCurObj = iter->get();
+      if (pCurObj && pCurObj->m_Left <= m_ClipRect.right &&
+          pCurObj->m_Right >= m_ClipRect.left &&
+          pCurObj->m_Bottom <= m_ClipRect.top &&
+          pCurObj->m_Top >= m_ClipRect.bottom) {
+        if (m_pRenderStatus->ContinueSingleObject(
+                pCurObj, &m_pCurrentLayer->m_Matrix, pPause)) {
+          return;
+        }
+        if (pCurObj->IsImage() &&
+            m_pRenderStatus->m_Options.m_Flags & RENDER_LIMITEDIMAGECACHE) {
+          m_pContext->GetPageCache()->CacheOptimization(
+              m_pRenderStatus->m_Options.m_dwLimitCacheSize);
+        }
+        if (pCurObj->IsForm() || pCurObj->IsShading()) {
+          nObjsToGo = 0;
+        } else {
+          --nObjsToGo;
+        }
+      }
+      m_LastObjectRendered = iter;
+      if (nObjsToGo == 0) {
+        if (pPause && pPause->NeedToPauseNow())
+          return;
+        nObjsToGo = kStepLimit;
+      }
+      ++iter;
+    }
+    if (m_pCurrentLayer->m_pObjectHolder->IsParsed()) {
+      m_pRenderStatus.reset();
+      m_pDevice->RestoreState();
+      m_pCurrentLayer = nullptr;
+      m_LayerIndex++;
+      if (pPause && pPause->NeedToPauseNow()) {
+        return;
+      }
+    } else {
+      m_pCurrentLayer->m_pObjectHolder->ContinueParse(pPause);
+      if (!m_pCurrentLayer->m_pObjectHolder->IsParsed())
+        return;
+    }
+  }
+}
+
+CPDF_TransferFunc* CPDF_DocRenderData::GetTransferFunc(CPDF_Object* pObj) {
+  if (!pObj)
+    return nullptr;
+
+  auto it = m_TransferFuncMap.find(pObj);
+  if (it != m_TransferFuncMap.end()) {
+    CPDF_CountedObject<CPDF_TransferFunc>* pTransferCounter = it->second;
+    return pTransferCounter->AddRef();
+  }
+
+  std::unique_ptr<CPDF_Function> pFuncs[3];
+  FX_BOOL bUniTransfer = TRUE;
+  FX_BOOL bIdentity = TRUE;
+  if (CPDF_Array* pArray = pObj->AsArray()) {
+    bUniTransfer = FALSE;
+    if (pArray->GetCount() < 3)
+      return nullptr;
+
+    for (FX_DWORD i = 0; i < 3; ++i) {
+      pFuncs[2 - i].reset(CPDF_Function::Load(pArray->GetElementValue(i)));
+      if (!pFuncs[2 - i])
+        return nullptr;
+    }
+  } else {
+    pFuncs[0].reset(CPDF_Function::Load(pObj));
+    if (!pFuncs[0])
+      return nullptr;
+  }
+  CPDF_TransferFunc* pTransfer = new CPDF_TransferFunc(m_pPDFDoc);
+  CPDF_CountedObject<CPDF_TransferFunc>* pTransferCounter =
+      new CPDF_CountedObject<CPDF_TransferFunc>(pTransfer);
+  m_TransferFuncMap[pObj] = pTransferCounter;
+  static const int kMaxOutputs = 16;
+  FX_FLOAT output[kMaxOutputs];
+  FXSYS_memset(output, 0, sizeof(output));
+  FX_FLOAT input;
+  int noutput;
+  for (int v = 0; v < 256; ++v) {
+    input = (FX_FLOAT)v / 255.0f;
+    if (bUniTransfer) {
+      if (pFuncs[0] && pFuncs[0]->CountOutputs() <= kMaxOutputs)
+        pFuncs[0]->Call(&input, 1, output, noutput);
+      int o = FXSYS_round(output[0] * 255);
+      if (o != v)
+        bIdentity = FALSE;
+      for (int i = 0; i < 3; ++i) {
+        pTransfer->m_Samples[i * 256 + v] = o;
+      }
+    } else {
+      for (int i = 0; i < 3; ++i) {
+        if (pFuncs[i] && pFuncs[i]->CountOutputs() <= kMaxOutputs) {
+          pFuncs[i]->Call(&input, 1, output, noutput);
+          int o = FXSYS_round(output[0] * 255);
+          if (o != v)
+            bIdentity = FALSE;
+          pTransfer->m_Samples[i * 256 + v] = o;
+        } else {
+          pTransfer->m_Samples[i * 256 + v] = v;
+        }
+      }
+    }
+  }
+
+  pTransfer->m_bIdentity = bIdentity;
+  return pTransferCounter->AddRef();
+}
+
+void CPDF_DocRenderData::ReleaseTransferFunc(CPDF_Object* pObj) {
+  auto it = m_TransferFuncMap.find(pObj);
+  if (it != m_TransferFuncMap.end())
+    it->second->RemoveRef();
+}
+
+CPDF_DeviceBuffer::CPDF_DeviceBuffer()
+    : m_pDevice(nullptr), m_pContext(nullptr), m_pObject(nullptr) {}
+
+CPDF_DeviceBuffer::~CPDF_DeviceBuffer() {}
+
+FX_BOOL CPDF_DeviceBuffer::Initialize(CPDF_RenderContext* pContext,
+                                      CFX_RenderDevice* pDevice,
+                                      FX_RECT* pRect,
+                                      const CPDF_PageObject* pObj,
+                                      int max_dpi) {
+  m_pDevice = pDevice;
+  m_pContext = pContext;
+  m_Rect = *pRect;
+  m_pObject = pObj;
+  m_Matrix.TranslateI(-pRect->left, -pRect->top);
+#if _FXM_PLATFORM_ != _FXM_PLATFORM_APPLE_
+  int horz_size = pDevice->GetDeviceCaps(FXDC_HORZ_SIZE);
+  int vert_size = pDevice->GetDeviceCaps(FXDC_VERT_SIZE);
+  if (horz_size && vert_size && max_dpi) {
+    int dpih =
+        pDevice->GetDeviceCaps(FXDC_PIXEL_WIDTH) * 254 / (horz_size * 10);
+    int dpiv =
+        pDevice->GetDeviceCaps(FXDC_PIXEL_HEIGHT) * 254 / (vert_size * 10);
+    if (dpih > max_dpi) {
+      m_Matrix.Scale((FX_FLOAT)(max_dpi) / dpih, 1.0f);
+    }
+    if (dpiv > max_dpi) {
+      m_Matrix.Scale(1.0f, (FX_FLOAT)(max_dpi) / (FX_FLOAT)dpiv);
+    }
+  }
+#endif
+  CFX_Matrix ctm = m_pDevice->GetCTM();
+  FX_FLOAT fScaleX = FXSYS_fabs(ctm.a);
+  FX_FLOAT fScaleY = FXSYS_fabs(ctm.d);
+  m_Matrix.Concat(fScaleX, 0, 0, fScaleY, 0, 0);
+  CFX_FloatRect rect(*pRect);
+  m_Matrix.TransformRect(rect);
+  FX_RECT bitmap_rect = rect.GetOutterRect();
+  m_pBitmap.reset(new CFX_DIBitmap);
+  m_pBitmap->Create(bitmap_rect.Width(), bitmap_rect.Height(), FXDIB_Argb);
+  return TRUE;
+}
+void CPDF_DeviceBuffer::OutputToDevice() {
+  if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_GET_BITS) {
+    if (m_Matrix.a == 1.0f && m_Matrix.d == 1.0f) {
+      m_pDevice->SetDIBits(m_pBitmap.get(), m_Rect.left, m_Rect.top);
+    } else {
+      m_pDevice->StretchDIBits(m_pBitmap.get(), m_Rect.left, m_Rect.top,
+                               m_Rect.Width(), m_Rect.Height());
+    }
+  } else {
+    CFX_DIBitmap buffer;
+    m_pDevice->CreateCompatibleBitmap(&buffer, m_pBitmap->GetWidth(),
+                                      m_pBitmap->GetHeight());
+    m_pContext->GetBackground(&buffer, m_pObject, NULL, &m_Matrix);
+    buffer.CompositeBitmap(0, 0, buffer.GetWidth(), buffer.GetHeight(),
+                           m_pBitmap.get(), 0, 0);
+    m_pDevice->StretchDIBits(&buffer, m_Rect.left, m_Rect.top, m_Rect.Width(),
+                             m_Rect.Height());
+  }
+}
+
+CPDF_ScaledRenderBuffer::CPDF_ScaledRenderBuffer() {}
+
+CPDF_ScaledRenderBuffer::~CPDF_ScaledRenderBuffer() {}
+
+#define _FPDFAPI_IMAGESIZE_LIMIT_ (30 * 1024 * 1024)
+FX_BOOL CPDF_ScaledRenderBuffer::Initialize(CPDF_RenderContext* pContext,
+                                            CFX_RenderDevice* pDevice,
+                                            const FX_RECT& pRect,
+                                            const CPDF_PageObject* pObj,
+                                            const CPDF_RenderOptions* pOptions,
+                                            int max_dpi) {
+  m_pDevice = pDevice;
+  if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_GET_BITS) {
+    return TRUE;
+  }
+  m_pContext = pContext;
+  m_Rect = pRect;
+  m_pObject = pObj;
+  m_Matrix.TranslateI(-pRect.left, -pRect.top);
+  int horz_size = pDevice->GetDeviceCaps(FXDC_HORZ_SIZE);
+  int vert_size = pDevice->GetDeviceCaps(FXDC_VERT_SIZE);
+  if (horz_size && vert_size && max_dpi) {
+    int dpih =
+        pDevice->GetDeviceCaps(FXDC_PIXEL_WIDTH) * 254 / (horz_size * 10);
+    int dpiv =
+        pDevice->GetDeviceCaps(FXDC_PIXEL_HEIGHT) * 254 / (vert_size * 10);
+    if (dpih > max_dpi) {
+      m_Matrix.Scale((FX_FLOAT)(max_dpi) / dpih, 1.0f);
+    }
+    if (dpiv > max_dpi) {
+      m_Matrix.Scale(1.0f, (FX_FLOAT)(max_dpi) / (FX_FLOAT)dpiv);
+    }
+  }
+  m_pBitmapDevice.reset(new CFX_FxgeDevice);
+  FXDIB_Format dibFormat = FXDIB_Rgb;
+  int32_t bpp = 24;
+  if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_ALPHA_OUTPUT) {
+    dibFormat = FXDIB_Argb;
+    bpp = 32;
+  }
+  while (1) {
+    CFX_FloatRect rect(pRect);
+    m_Matrix.TransformRect(rect);
+    FX_RECT bitmap_rect = rect.GetOutterRect();
+    int32_t iWidth = bitmap_rect.Width();
+    int32_t iHeight = bitmap_rect.Height();
+    int32_t iPitch = (iWidth * bpp + 31) / 32 * 4;
+    if (iWidth * iHeight < 1)
+      return FALSE;
+
+    if (iPitch * iHeight <= _FPDFAPI_IMAGESIZE_LIMIT_ &&
+        m_pBitmapDevice->Create(iWidth, iHeight, dibFormat)) {
+      break;
+    }
+    m_Matrix.Scale(0.5f, 0.5f);
+  }
+  m_pContext->GetBackground(m_pBitmapDevice->GetBitmap(), m_pObject, pOptions,
+                            &m_Matrix);
+  return TRUE;
+}
+void CPDF_ScaledRenderBuffer::OutputToDevice() {
+  if (m_pBitmapDevice) {
+    m_pDevice->StretchDIBits(m_pBitmapDevice->GetBitmap(), m_Rect.left,
+                             m_Rect.top, m_Rect.Width(), m_Rect.Height());
+  }
+}
+FX_BOOL IPDF_OCContext::CheckObjectVisible(const CPDF_PageObject* pObj) {
+  const CPDF_ContentMarkData* pData = pObj->m_ContentMark;
+  int nItems = pData->CountItems();
+  for (int i = 0; i < nItems; i++) {
+    const CPDF_ContentMarkItem& item = pData->GetItem(i);
+    if (item.GetName() == "OC" &&
+        item.GetParamType() == CPDF_ContentMarkItem::PropertiesDict &&
+        !CheckOCGVisible(item.GetParam())) {
+      return FALSE;
+    }
+  }
+  return TRUE;
+}
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_cache.cpp b/core/fpdfapi/fpdf_render/fpdf_render_cache.cpp
new file mode 100644
index 0000000000..f5ab7e0da5
--- /dev/null
+++ b/core/fpdfapi/fpdf_render/fpdf_render_cache.cpp
@@ -0,0 +1,334 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfapi/fpdf_render/render_int.h"
+
+#include "core/fpdfapi/fpdf_page/pageint.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/fpdf_pageobj.h"
+#include "core/include/fpdfapi/fpdf_render.h"
+#include "core/include/fxge/fx_ge.h"
+
+struct CACHEINFO {
+  FX_DWORD time;
+  CPDF_Stream* pStream;
+};
+
+extern "C" {
+static int compare(const void* data1, const void* data2) {
+  return ((CACHEINFO*)data1)->time - ((CACHEINFO*)data2)->time;
+}
+}  // extern "C"
+
+CPDF_PageRenderCache::~CPDF_PageRenderCache() {
+  for (const auto& it : m_ImageCache)
+    delete it.second;
+}
+void CPDF_PageRenderCache::CacheOptimization(int32_t dwLimitCacheSize) {
+  if (m_nCacheSize <= (FX_DWORD)dwLimitCacheSize)
+    return;
+
+  size_t nCount = m_ImageCache.size();
+  CACHEINFO* pCACHEINFO = FX_Alloc(CACHEINFO, nCount);
+  size_t i = 0;
+  for (const auto& it : m_ImageCache) {
+    pCACHEINFO[i].time = it.second->GetTimeCount();
+    pCACHEINFO[i++].pStream = it.second->GetStream();
+  }
+  FXSYS_qsort(pCACHEINFO, nCount, sizeof(CACHEINFO), compare);
+  FX_DWORD nTimeCount = m_nTimeCount;
+
+  // Check if time value is about to roll over and reset all entries.
+  // The comparision is legal because FX_DWORD is an unsigned type.
+  if (nTimeCount + 1 < nTimeCount) {
+    for (i = 0; i < nCount; i++)
+      m_ImageCache[pCACHEINFO[i].pStream]->m_dwTimeCount = i;
+    m_nTimeCount = nCount;
+  }
+
+  i = 0;
+  while (i + 15 < nCount)
+    ClearImageCacheEntry(pCACHEINFO[i++].pStream);
+
+  while (i < nCount && m_nCacheSize > (FX_DWORD)dwLimitCacheSize)
+    ClearImageCacheEntry(pCACHEINFO[i++].pStream);
+
+  FX_Free(pCACHEINFO);
+}
+void CPDF_PageRenderCache::ClearImageCacheEntry(CPDF_Stream* pStream) {
+  auto it = m_ImageCache.find(pStream);
+  if (it == m_ImageCache.end())
+    return;
+
+  m_nCacheSize -= it->second->EstimateSize();
+  delete it->second;
+  m_ImageCache.erase(it);
+}
+FX_DWORD CPDF_PageRenderCache::EstimateSize() {
+  FX_DWORD dwSize = 0;
+  for (const auto& it : m_ImageCache)
+    dwSize += it.second->EstimateSize();
+
+  m_nCacheSize = dwSize;
+  return dwSize;
+}
+void CPDF_PageRenderCache::GetCachedBitmap(CPDF_Stream* pStream,
+                                           CFX_DIBSource*& pBitmap,
+                                           CFX_DIBSource*& pMask,
+                                           FX_DWORD& MatteColor,
+                                           FX_BOOL bStdCS,
+                                           FX_DWORD GroupFamily,
+                                           FX_BOOL bLoadMask,
+                                           CPDF_RenderStatus* pRenderStatus,
+                                           int32_t downsampleWidth,
+                                           int32_t downsampleHeight) {
+  CPDF_ImageCacheEntry* pEntry;
+  const auto it = m_ImageCache.find(pStream);
+  FX_BOOL bFound = it != m_ImageCache.end();
+  if (bFound)
+    pEntry = it->second;
+  else
+    pEntry = new CPDF_ImageCacheEntry(m_pPage->m_pDocument, pStream);
+
+  m_nTimeCount++;
+  FX_BOOL bAlreadyCached = pEntry->GetCachedBitmap(
+      pBitmap, pMask, MatteColor, m_pPage->m_pPageResources, bStdCS,
+      GroupFamily, bLoadMask, pRenderStatus, downsampleWidth, downsampleHeight);
+
+  if (!bFound)
+    m_ImageCache[pStream] = pEntry;
+
+  if (!bAlreadyCached)
+    m_nCacheSize += pEntry->EstimateSize();
+}
+FX_BOOL CPDF_PageRenderCache::StartGetCachedBitmap(
+    CPDF_Stream* pStream,
+    FX_BOOL bStdCS,
+    FX_DWORD GroupFamily,
+    FX_BOOL bLoadMask,
+    CPDF_RenderStatus* pRenderStatus,
+    int32_t downsampleWidth,
+    int32_t downsampleHeight) {
+  const auto it = m_ImageCache.find(pStream);
+  m_bCurFindCache = it != m_ImageCache.end();
+  if (m_bCurFindCache) {
+    m_pCurImageCacheEntry = it->second;
+  } else {
+    m_pCurImageCacheEntry =
+        new CPDF_ImageCacheEntry(m_pPage->m_pDocument, pStream);
+  }
+  int ret = m_pCurImageCacheEntry->StartGetCachedBitmap(
+      pRenderStatus->m_pFormResource, m_pPage->m_pPageResources, bStdCS,
+      GroupFamily, bLoadMask, pRenderStatus, downsampleWidth, downsampleHeight);
+  if (ret == 2)
+    return TRUE;
+
+  m_nTimeCount++;
+  if (!m_bCurFindCache)
+    m_ImageCache[pStream] = m_pCurImageCacheEntry;
+
+  if (!ret)
+    m_nCacheSize += m_pCurImageCacheEntry->EstimateSize();
+
+  return FALSE;
+}
+FX_BOOL CPDF_PageRenderCache::Continue(IFX_Pause* pPause) {
+  int ret = m_pCurImageCacheEntry->Continue(pPause);
+  if (ret == 2)
+    return TRUE;
+  m_nTimeCount++;
+  if (!m_bCurFindCache)
+    m_ImageCache[m_pCurImageCacheEntry->GetStream()] = m_pCurImageCacheEntry;
+  if (!ret)
+    m_nCacheSize += m_pCurImageCacheEntry->EstimateSize();
+  return FALSE;
+}
+void CPDF_PageRenderCache::ResetBitmap(CPDF_Stream* pStream,
+                                       const CFX_DIBitmap* pBitmap) {
+  CPDF_ImageCacheEntry* pEntry;
+  const auto it = m_ImageCache.find(pStream);
+  if (it == m_ImageCache.end()) {
+    if (!pBitmap)
+      return;
+    pEntry = new CPDF_ImageCacheEntry(m_pPage->m_pDocument, pStream);
+    m_ImageCache[pStream] = pEntry;
+  } else {
+    pEntry = it->second;
+  }
+  m_nCacheSize -= pEntry->EstimateSize();
+  pEntry->Reset(pBitmap);
+  m_nCacheSize += pEntry->EstimateSize();
+}
+CPDF_ImageCacheEntry::CPDF_ImageCacheEntry(CPDF_Document* pDoc,
+                                           CPDF_Stream* pStream)
+    : m_dwTimeCount(0),
+      m_pCurBitmap(NULL),
+      m_pCurMask(NULL),
+      m_MatteColor(0),
+      m_pRenderStatus(NULL),
+      m_pDocument(pDoc),
+      m_pStream(pStream),
+      m_pCachedBitmap(NULL),
+      m_pCachedMask(NULL),
+      m_dwCacheSize(0) {}
+CPDF_ImageCacheEntry::~CPDF_ImageCacheEntry() {
+  delete m_pCachedBitmap;
+  delete m_pCachedMask;
+}
+void CPDF_ImageCacheEntry::Reset(const CFX_DIBitmap* pBitmap) {
+  delete m_pCachedBitmap;
+  m_pCachedBitmap = NULL;
+  if (pBitmap) {
+    m_pCachedBitmap = pBitmap->Clone();
+  }
+  CalcSize();
+}
+void CPDF_PageRenderCache::ClearImageData() {
+  for (const auto& it : m_ImageCache)
+    it.second->ClearImageData();
+}
+void CPDF_ImageCacheEntry::ClearImageData() {
+  if (m_pCachedBitmap && !m_pCachedBitmap->GetBuffer()) {
+    ((CPDF_DIBSource*)m_pCachedBitmap)->ClearImageData();
+  }
+}
+static FX_DWORD FPDF_ImageCache_EstimateImageSize(const CFX_DIBSource* pDIB) {
+  return pDIB && pDIB->GetBuffer()
+             ? (FX_DWORD)pDIB->GetHeight() * pDIB->GetPitch() +
+                   (FX_DWORD)pDIB->GetPaletteSize() * 4
+             : 0;
+}
+FX_BOOL CPDF_ImageCacheEntry::GetCachedBitmap(CFX_DIBSource*& pBitmap,
+                                              CFX_DIBSource*& pMask,
+                                              FX_DWORD& MatteColor,
+                                              CPDF_Dictionary* pPageResources,
+                                              FX_BOOL bStdCS,
+                                              FX_DWORD GroupFamily,
+                                              FX_BOOL bLoadMask,
+                                              CPDF_RenderStatus* pRenderStatus,
+                                              int32_t downsampleWidth,
+                                              int32_t downsampleHeight) {
+  if (m_pCachedBitmap) {
+    pBitmap = m_pCachedBitmap;
+    pMask = m_pCachedMask;
+    MatteColor = m_MatteColor;
+    return TRUE;
+  }
+  if (!pRenderStatus) {
+    return FALSE;
+  }
+  CPDF_RenderContext* pContext = pRenderStatus->GetContext();
+  CPDF_PageRenderCache* pPageRenderCache = pContext->GetPageCache();
+  m_dwTimeCount = pPageRenderCache->GetTimeCount();
+  CPDF_DIBSource* pSrc = new CPDF_DIBSource;
+  CPDF_DIBSource* pMaskSrc = NULL;
+  if (!pSrc->Load(m_pDocument, m_pStream, &pMaskSrc, &MatteColor,
+                  pRenderStatus->m_pFormResource, pPageResources, bStdCS,
+                  GroupFamily, bLoadMask)) {
+    delete pSrc;
+    pBitmap = NULL;
+    return FALSE;
+  }
+  m_MatteColor = MatteColor;
+  if (pSrc->GetPitch() * pSrc->GetHeight() < FPDF_HUGE_IMAGE_SIZE) {
+    m_pCachedBitmap = pSrc->Clone();
+    delete pSrc;
+  } else {
+    m_pCachedBitmap = pSrc;
+  }
+  if (pMaskSrc) {
+    m_pCachedMask = pMaskSrc->Clone();
+    delete pMaskSrc;
+  }
+
+  pBitmap = m_pCachedBitmap;
+  pMask = m_pCachedMask;
+  CalcSize();
+  return FALSE;
+}
+CFX_DIBSource* CPDF_ImageCacheEntry::DetachBitmap() {
+  CFX_DIBSource* pDIBSource = m_pCurBitmap;
+  m_pCurBitmap = NULL;
+  return pDIBSource;
+}
+CFX_DIBSource* CPDF_ImageCacheEntry::DetachMask() {
+  CFX_DIBSource* pDIBSource = m_pCurMask;
+  m_pCurMask = NULL;
+  return pDIBSource;
+}
+int CPDF_ImageCacheEntry::StartGetCachedBitmap(CPDF_Dictionary* pFormResources,
+                                               CPDF_Dictionary* pPageResources,
+                                               FX_BOOL bStdCS,
+                                               FX_DWORD GroupFamily,
+                                               FX_BOOL bLoadMask,
+                                               CPDF_RenderStatus* pRenderStatus,
+                                               int32_t downsampleWidth,
+                                               int32_t downsampleHeight) {
+  if (m_pCachedBitmap) {
+    m_pCurBitmap = m_pCachedBitmap;
+    m_pCurMask = m_pCachedMask;
+    return 1;
+  }
+  if (!pRenderStatus) {
+    return 0;
+  }
+  m_pRenderStatus = pRenderStatus;
+  m_pCurBitmap = new CPDF_DIBSource;
+  int ret =
+      ((CPDF_DIBSource*)m_pCurBitmap)
+          ->StartLoadDIBSource(m_pDocument, m_pStream, TRUE, pFormResources,
+                               pPageResources, bStdCS, GroupFamily, bLoadMask);
+  if (ret == 2) {
+    return ret;
+  }
+  if (!ret) {
+    delete m_pCurBitmap;
+    m_pCurBitmap = NULL;
+    return 0;
+  }
+  ContinueGetCachedBitmap();
+  return 0;
+}
+void CPDF_ImageCacheEntry::ContinueGetCachedBitmap() {
+  m_MatteColor = ((CPDF_DIBSource*)m_pCurBitmap)->GetMatteColor();
+  m_pCurMask = ((CPDF_DIBSource*)m_pCurBitmap)->DetachMask();
+  CPDF_RenderContext* pContext = m_pRenderStatus->GetContext();
+  CPDF_PageRenderCache* pPageRenderCache = pContext->GetPageCache();
+  m_dwTimeCount = pPageRenderCache->GetTimeCount();
+  if (m_pCurBitmap->GetPitch() * m_pCurBitmap->GetHeight() <
+      FPDF_HUGE_IMAGE_SIZE) {
+    m_pCachedBitmap = m_pCurBitmap->Clone();
+    delete m_pCurBitmap;
+    m_pCurBitmap = NULL;
+  } else {
+    m_pCachedBitmap = m_pCurBitmap;
+  }
+  if (m_pCurMask) {
+    m_pCachedMask = m_pCurMask->Clone();
+    delete m_pCurMask;
+    m_pCurMask = NULL;
+  }
+  m_pCurBitmap = m_pCachedBitmap;
+  m_pCurMask = m_pCachedMask;
+  CalcSize();
+}
+int CPDF_ImageCacheEntry::Continue(IFX_Pause* pPause) {
+  int ret = ((CPDF_DIBSource*)m_pCurBitmap)->ContinueLoadDIBSource(pPause);
+  if (ret == 2) {
+    return ret;
+  }
+  if (!ret) {
+    delete m_pCurBitmap;
+    m_pCurBitmap = NULL;
+    return 0;
+  }
+  ContinueGetCachedBitmap();
+  return 0;
+}
+void CPDF_ImageCacheEntry::CalcSize() {
+  m_dwCacheSize = FPDF_ImageCache_EstimateImageSize(m_pCachedBitmap) +
+                  FPDF_ImageCache_EstimateImageSize(m_pCachedMask);
+}
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_image.cpp b/core/fpdfapi/fpdf_render/fpdf_render_image.cpp
new file mode 100644
index 0000000000..6c235a0258
--- /dev/null
+++ b/core/fpdfapi/fpdf_render/fpdf_render_image.cpp
@@ -0,0 +1,998 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfapi/fpdf_render/render_int.h"
+
+#include <utility>
+#include <vector>
+
+#include "core/fpdfapi/fpdf_page/pageint.h"
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_dictionary.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/fpdf_module.h"
+#include "core/include/fpdfapi/fpdf_pageobj.h"
+#include "core/include/fpdfapi/fpdf_render.h"
+#include "core/include/fxcodec/fx_codec.h"
+#include "core/include/fxcrt/fx_safe_types.h"
+#include "core/include/fxge/fx_ge.h"
+
+FX_BOOL CPDF_RenderStatus::ProcessImage(const CPDF_ImageObject* pImageObj,
+                                        const CFX_Matrix* pObj2Device) {
+  CPDF_ImageRenderer render;
+  if (render.Start(this, pImageObj, pObj2Device, m_bStdCS, m_curBlend)) {
+    render.Continue(NULL);
+  }
+  return render.m_Result;
+}
+void CPDF_RenderStatus::CompositeDIBitmap(CFX_DIBitmap* pDIBitmap,
+                                          int left,
+                                          int top,
+                                          FX_ARGB mask_argb,
+                                          int bitmap_alpha,
+                                          int blend_mode,
+                                          int Transparency) {
+  if (!pDIBitmap) {
+    return;
+  }
+  FX_BOOL bIsolated = Transparency & PDFTRANS_ISOLATED;
+  FX_BOOL bGroup = Transparency & PDFTRANS_GROUP;
+  if (blend_mode == FXDIB_BLEND_NORMAL) {
+    if (!pDIBitmap->IsAlphaMask()) {
+      if (bitmap_alpha < 255) {
+        pDIBitmap->MultiplyAlpha(bitmap_alpha);
+      }
+      if (m_pDevice->SetDIBits(pDIBitmap, left, top)) {
+        return;
+      }
+    } else {
+      FX_DWORD fill_argb = m_Options.TranslateColor(mask_argb);
+      if (bitmap_alpha < 255) {
+        ((uint8_t*)&fill_argb)[3] =
+            ((uint8_t*)&fill_argb)[3] * bitmap_alpha / 255;
+      }
+      if (m_pDevice->SetBitMask(pDIBitmap, left, top, fill_argb)) {
+        return;
+      }
+    }
+  }
+  FX_BOOL bBackAlphaRequired = blend_mode && bIsolated && !m_bDropObjects;
+  FX_BOOL bGetBackGround =
+      ((m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT)) ||
+      (!(m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT) &&
+       (m_pDevice->GetRenderCaps() & FXRC_GET_BITS) && !bBackAlphaRequired);
+  if (bGetBackGround) {
+    if (bIsolated || !bGroup) {
+      if (pDIBitmap->IsAlphaMask()) {
+        return;
+      }
+      m_pDevice->SetDIBits(pDIBitmap, left, top, blend_mode);
+    } else {
+      FX_RECT rect(left, top, left + pDIBitmap->GetWidth(),
+                   top + pDIBitmap->GetHeight());
+      rect.Intersect(m_pDevice->GetClipBox());
+      CFX_DIBitmap* pClone = NULL;
+      FX_BOOL bClone = FALSE;
+      if (m_pDevice->GetBackDrop() && m_pDevice->GetBitmap()) {
+        bClone = TRUE;
+        pClone = m_pDevice->GetBackDrop()->Clone(&rect);
+        CFX_DIBitmap* pForeBitmap = m_pDevice->GetBitmap();
+        pClone->CompositeBitmap(0, 0, pClone->GetWidth(), pClone->GetHeight(),
+                                pForeBitmap, rect.left, rect.top);
+        left = left >= 0 ? 0 : left;
+        top = top >= 0 ? 0 : top;
+        if (!pDIBitmap->IsAlphaMask())
+          pClone->CompositeBitmap(0, 0, pClone->GetWidth(), pClone->GetHeight(),
+                                  pDIBitmap, left, top, blend_mode);
+        else
+          pClone->CompositeMask(0, 0, pClone->GetWidth(), pClone->GetHeight(),
+                                pDIBitmap, mask_argb, left, top, blend_mode);
+      } else {
+        pClone = pDIBitmap;
+      }
+      if (m_pDevice->GetBackDrop()) {
+        m_pDevice->SetDIBits(pClone, rect.left, rect.top);
+      } else {
+        if (pDIBitmap->IsAlphaMask()) {
+          return;
+        }
+        m_pDevice->SetDIBits(pDIBitmap, rect.left, rect.top, blend_mode);
+      }
+      if (bClone) {
+        delete pClone;
+      }
+    }
+    return;
+  }
+  int back_left, back_top;
+  FX_RECT rect(left, top, left + pDIBitmap->GetWidth(),
+               top + pDIBitmap->GetHeight());
+  std::unique_ptr<CFX_DIBitmap> pBackdrop(
+      GetBackdrop(m_pCurObj, rect, back_left, back_top,
+                  blend_mode > FXDIB_BLEND_NORMAL && bIsolated));
+  if (!pBackdrop)
+    return;
+
+  if (!pDIBitmap->IsAlphaMask()) {
+    pBackdrop->CompositeBitmap(left - back_left, top - back_top,
+                               pDIBitmap->GetWidth(), pDIBitmap->GetHeight(),
+                               pDIBitmap, 0, 0, blend_mode);
+  } else {
+    pBackdrop->CompositeMask(left - back_left, top - back_top,
+                             pDIBitmap->GetWidth(), pDIBitmap->GetHeight(),
+                             pDIBitmap, mask_argb, 0, 0, blend_mode);
+  }
+
+  std::unique_ptr<CFX_DIBitmap> pBackdrop1(new CFX_DIBitmap);
+  pBackdrop1->Create(pBackdrop->GetWidth(), pBackdrop->GetHeight(),
+                     FXDIB_Rgb32);
+  pBackdrop1->Clear((FX_DWORD)-1);
+  pBackdrop1->CompositeBitmap(0, 0, pBackdrop->GetWidth(),
+                              pBackdrop->GetHeight(), pBackdrop.get(), 0, 0);
+  pBackdrop = std::move(pBackdrop1);
+  m_pDevice->SetDIBits(pBackdrop.get(), back_left, back_top);
+}
+
+CPDF_TransferFunc::CPDF_TransferFunc(CPDF_Document* pDoc) : m_pPDFDoc(pDoc) {}
+
+FX_COLORREF CPDF_TransferFunc::TranslateColor(FX_COLORREF rgb) const {
+  return FXSYS_RGB(m_Samples[FXSYS_GetRValue(rgb)],
+                   m_Samples[256 + FXSYS_GetGValue(rgb)],
+                   m_Samples[512 + FXSYS_GetBValue(rgb)]);
+}
+
+CFX_DIBSource* CPDF_TransferFunc::TranslateImage(const CFX_DIBSource* pSrc,
+                                                 FX_BOOL bAutoDropSrc) {
+  CPDF_DIBTransferFunc* pDest = new CPDF_DIBTransferFunc(this);
+  pDest->LoadSrc(pSrc, bAutoDropSrc);
+  return pDest;
+}
+
+CPDF_DIBTransferFunc::~CPDF_DIBTransferFunc() {}
+
+FXDIB_Format CPDF_DIBTransferFunc::GetDestFormat() {
+  if (m_pSrc->IsAlphaMask()) {
+    return FXDIB_8bppMask;
+  }
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+  return (m_pSrc->HasAlpha()) ? FXDIB_Argb : FXDIB_Rgb32;
+#else
+  return (m_pSrc->HasAlpha()) ? FXDIB_Argb : FXDIB_Rgb;
+#endif
+}
+CPDF_DIBTransferFunc::CPDF_DIBTransferFunc(
+    const CPDF_TransferFunc* pTransferFunc) {
+  m_RampR = pTransferFunc->m_Samples;
+  m_RampG = &pTransferFunc->m_Samples[256];
+  m_RampB = &pTransferFunc->m_Samples[512];
+}
+void CPDF_DIBTransferFunc::TranslateScanline(uint8_t* dest_buf,
+                                             const uint8_t* src_buf) const {
+  int i;
+  FX_BOOL bSkip = FALSE;
+  switch (m_pSrc->GetFormat()) {
+    case FXDIB_1bppRgb: {
+      int r0 = m_RampR[0], g0 = m_RampG[0], b0 = m_RampB[0];
+      int r1 = m_RampR[255], g1 = m_RampG[255], b1 = m_RampB[255];
+      for (i = 0; i < m_Width; i++) {
+        if (src_buf[i / 8] & (1 << (7 - i % 8))) {
+          *dest_buf++ = b1;
+          *dest_buf++ = g1;
+          *dest_buf++ = r1;
+        } else {
+          *dest_buf++ = b0;
+          *dest_buf++ = g0;
+          *dest_buf++ = r0;
+        }
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+        dest_buf++;
+#endif
+      }
+      break;
+    }
+    case FXDIB_1bppMask: {
+      int m0 = m_RampR[0], m1 = m_RampR[255];
+      for (i = 0; i < m_Width; i++) {
+        if (src_buf[i / 8] & (1 << (7 - i % 8))) {
+          *dest_buf++ = m1;
+        } else {
+          *dest_buf++ = m0;
+        }
+      }
+      break;
+    }
+    case FXDIB_8bppRgb: {
+      FX_ARGB* pPal = m_pSrc->GetPalette();
+      for (i = 0; i < m_Width; i++) {
+        if (pPal) {
+          FX_ARGB src_argb = pPal[*src_buf];
+          *dest_buf++ = m_RampB[FXARGB_R(src_argb)];
+          *dest_buf++ = m_RampG[FXARGB_G(src_argb)];
+          *dest_buf++ = m_RampR[FXARGB_B(src_argb)];
+        } else {
+          FX_DWORD src_byte = *src_buf;
+          *dest_buf++ = m_RampB[src_byte];
+          *dest_buf++ = m_RampG[src_byte];
+          *dest_buf++ = m_RampR[src_byte];
+        }
+        src_buf++;
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+        dest_buf++;
+#endif
+      }
+      break;
+    }
+    case FXDIB_8bppMask:
+      for (i = 0; i < m_Width; i++) {
+        *dest_buf++ = m_RampR[*(src_buf++)];
+      }
+      break;
+    case FXDIB_Rgb:
+      for (i = 0; i < m_Width; i++) {
+        *dest_buf++ = m_RampB[*(src_buf++)];
+        *dest_buf++ = m_RampG[*(src_buf++)];
+        *dest_buf++ = m_RampR[*(src_buf++)];
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+        dest_buf++;
+#endif
+      }
+      break;
+    case FXDIB_Rgb32:
+      bSkip = TRUE;
+    case FXDIB_Argb:
+      for (i = 0; i < m_Width; i++) {
+        *dest_buf++ = m_RampB[*(src_buf++)];
+        *dest_buf++ = m_RampG[*(src_buf++)];
+        *dest_buf++ = m_RampR[*(src_buf++)];
+        if (!bSkip) {
+          *dest_buf++ = *src_buf;
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+        } else {
+          dest_buf++;
+#endif
+        }
+        src_buf++;
+      }
+      break;
+    default:
+      break;
+  }
+}
+void CPDF_DIBTransferFunc::TranslateDownSamples(uint8_t* dest_buf,
+                                                const uint8_t* src_buf,
+                                                int pixels,
+                                                int Bpp) const {
+  if (Bpp == 8) {
+    for (int i = 0; i < pixels; i++) {
+      *dest_buf++ = m_RampR[*(src_buf++)];
+    }
+  } else if (Bpp == 24) {
+    for (int i = 0; i < pixels; i++) {
+      *dest_buf++ = m_RampB[*(src_buf++)];
+      *dest_buf++ = m_RampG[*(src_buf++)];
+      *dest_buf++ = m_RampR[*(src_buf++)];
+    }
+  } else {
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+    if (!m_pSrc->HasAlpha()) {
+      for (int i = 0; i < pixels; i++) {
+        *dest_buf++ = m_RampB[*(src_buf++)];
+        *dest_buf++ = m_RampG[*(src_buf++)];
+        *dest_buf++ = m_RampR[*(src_buf++)];
+        dest_buf++;
+        src_buf++;
+      }
+    } else {
+#endif
+      for (int i = 0; i < pixels; i++) {
+        *dest_buf++ = m_RampB[*(src_buf++)];
+        *dest_buf++ = m_RampG[*(src_buf++)];
+        *dest_buf++ = m_RampR[*(src_buf++)];
+        *dest_buf++ = *(src_buf++);
+      }
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+    }
+#endif
+  }
+}
+CPDF_ImageRenderer::CPDF_ImageRenderer() {
+  m_pRenderStatus = NULL;
+  m_pImageObject = NULL;
+  m_Result = TRUE;
+  m_Status = 0;
+  m_pTransformer = NULL;
+  m_DeviceHandle = NULL;
+  m_LoadHandle = NULL;
+  m_pClone = NULL;
+  m_bStdCS = FALSE;
+  m_bPatternColor = FALSE;
+  m_BlendType = FXDIB_BLEND_NORMAL;
+  m_pPattern = NULL;
+  m_pObj2Device = NULL;
+}
+CPDF_ImageRenderer::~CPDF_ImageRenderer() {
+  delete m_pTransformer;
+  if (m_DeviceHandle) {
+    m_pRenderStatus->m_pDevice->CancelDIBits(m_DeviceHandle);
+  }
+  delete m_LoadHandle;
+  delete m_pClone;
+}
+FX_BOOL CPDF_ImageRenderer::StartLoadDIBSource() {
+  CFX_FloatRect image_rect_f = m_ImageMatrix.GetUnitRect();
+  FX_RECT image_rect = image_rect_f.GetOutterRect();
+  int dest_width = image_rect.Width();
+  int dest_height = image_rect.Height();
+  if (m_ImageMatrix.a < 0) {
+    dest_width = -dest_width;
+  }
+  if (m_ImageMatrix.d > 0) {
+    dest_height = -dest_height;
+  }
+  if (m_Loader.Start(m_pImageObject,
+                     m_pRenderStatus->m_pContext->GetPageCache(), m_LoadHandle,
+                     m_bStdCS, m_pRenderStatus->m_GroupFamily,
+                     m_pRenderStatus->m_bLoadMask, m_pRenderStatus, dest_width,
+                     dest_height)) {
+    if (m_LoadHandle) {
+      m_Status = 4;
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_ImageRenderer::StartRenderDIBSource() {
+  if (!m_Loader.m_pBitmap) {
+    return FALSE;
+  }
+  m_BitmapAlpha = 255;
+  const CPDF_GeneralStateData* pGeneralState = m_pImageObject->m_GeneralState;
+  if (pGeneralState) {
+    m_BitmapAlpha = FXSYS_round(pGeneralState->m_FillAlpha * 255);
+  }
+  m_pDIBSource = m_Loader.m_pBitmap;
+  if (m_pRenderStatus->m_Options.m_ColorMode == RENDER_COLOR_ALPHA &&
+      !m_Loader.m_pMask) {
+    return StartBitmapAlpha();
+  }
+  if (pGeneralState && pGeneralState->m_pTR) {
+    if (!pGeneralState->m_pTransferFunc) {
+      ((CPDF_GeneralStateData*)pGeneralState)->m_pTransferFunc =
+          m_pRenderStatus->GetTransferFunc(pGeneralState->m_pTR);
+    }
+    if (pGeneralState->m_pTransferFunc &&
+        !pGeneralState->m_pTransferFunc->m_bIdentity) {
+      m_pDIBSource = m_Loader.m_pBitmap =
+          pGeneralState->m_pTransferFunc->TranslateImage(m_Loader.m_pBitmap,
+                                                         !m_Loader.m_bCached);
+      if (m_Loader.m_bCached && m_Loader.m_pMask) {
+        m_Loader.m_pMask = m_Loader.m_pMask->Clone();
+      }
+      m_Loader.m_bCached = FALSE;
+    }
+  }
+  m_FillArgb = 0;
+  m_bPatternColor = FALSE;
+  m_pPattern = NULL;
+  if (m_pDIBSource->IsAlphaMask()) {
+    CPDF_Color* pColor = m_pImageObject->m_ColorState.GetFillColor();
+    if (pColor && pColor->IsPattern()) {
+      m_pPattern = pColor->GetPattern();
+      if (m_pPattern) {
+        m_bPatternColor = TRUE;
+      }
+    }
+    m_FillArgb = m_pRenderStatus->GetFillArgb(m_pImageObject);
+  } else if (m_pRenderStatus->m_Options.m_ColorMode == RENDER_COLOR_GRAY) {
+    m_pClone = m_pDIBSource->Clone();
+    m_pClone->ConvertColorScale(m_pRenderStatus->m_Options.m_BackColor,
+                                m_pRenderStatus->m_Options.m_ForeColor);
+    m_pDIBSource = m_pClone;
+  }
+  m_Flags = 0;
+  if (m_pRenderStatus->m_Options.m_Flags & RENDER_FORCE_DOWNSAMPLE) {
+    m_Flags |= RENDER_FORCE_DOWNSAMPLE;
+  } else if (m_pRenderStatus->m_Options.m_Flags & RENDER_FORCE_HALFTONE) {
+    m_Flags |= RENDER_FORCE_HALFTONE;
+  }
+  if (m_pRenderStatus->m_pDevice->GetDeviceClass() != FXDC_DISPLAY) {
+    CPDF_Object* pFilters =
+        m_pImageObject->m_pImage->GetStream()->GetDict()->GetElementValue(
+            "Filter");
+    if (pFilters) {
+      if (pFilters->IsName()) {
+        CFX_ByteStringC bsDecodeType = pFilters->GetConstString();
+        if (bsDecodeType == "DCTDecode" || bsDecodeType == "JPXDecode") {
+          m_Flags |= FXRENDER_IMAGE_LOSSY;
+        }
+      } else if (CPDF_Array* pArray = pFilters->AsArray()) {
+        for (FX_DWORD i = 0; i < pArray->GetCount(); i++) {
+          CFX_ByteStringC bsDecodeType = pArray->GetConstStringAt(i);
+          if (bsDecodeType == "DCTDecode" || bsDecodeType == "JPXDecode") {
+            m_Flags |= FXRENDER_IMAGE_LOSSY;
+            break;
+          }
+        }
+      }
+    }
+  }
+  if (m_pRenderStatus->m_Options.m_Flags & RENDER_NOIMAGESMOOTH) {
+    m_Flags |= FXDIB_NOSMOOTH;
+  } else if (m_pImageObject->m_pImage->IsInterpol()) {
+    m_Flags |= FXDIB_INTERPOL;
+  }
+  if (m_Loader.m_pMask) {
+    return DrawMaskedImage();
+  }
+  if (m_bPatternColor) {
+    return DrawPatternImage(m_pObj2Device);
+  }
+  if (m_BitmapAlpha == 255 && pGeneralState && pGeneralState->m_FillOP &&
+      pGeneralState->m_OPMode == 0 &&
+      pGeneralState->m_BlendType == FXDIB_BLEND_NORMAL &&
+      pGeneralState->m_StrokeAlpha == 1 && pGeneralState->m_FillAlpha == 1) {
+    CPDF_Document* pDocument = NULL;
+    CPDF_Page* pPage = NULL;
+    if (m_pRenderStatus->m_pContext->GetPageCache()) {
+      pPage = m_pRenderStatus->m_pContext->GetPageCache()->GetPage();
+      pDocument = pPage->m_pDocument;
+    } else {
+      pDocument = m_pImageObject->m_pImage->GetDocument();
+    }
+    CPDF_Dictionary* pPageResources = pPage ? pPage->m_pPageResources : NULL;
+    CPDF_Object* pCSObj =
+        m_pImageObject->m_pImage->GetStream()->GetDict()->GetElementValue(
+            "ColorSpace");
+    CPDF_ColorSpace* pColorSpace =
+        pDocument->LoadColorSpace(pCSObj, pPageResources);
+    if (pColorSpace) {
+      int format = pColorSpace->GetFamily();
+      if (format == PDFCS_DEVICECMYK || format == PDFCS_SEPARATION ||
+          format == PDFCS_DEVICEN) {
+        m_BlendType = FXDIB_BLEND_DARKEN;
+      }
+      pDocument->GetPageData()->ReleaseColorSpace(pCSObj);
+    }
+  }
+  return StartDIBSource();
+}
+FX_BOOL CPDF_ImageRenderer::Start(CPDF_RenderStatus* pStatus,
+                                  const CPDF_PageObject* pObj,
+                                  const CFX_Matrix* pObj2Device,
+                                  FX_BOOL bStdCS,
+                                  int blendType) {
+  m_pRenderStatus = pStatus;
+  m_bStdCS = bStdCS;
+  m_pImageObject = pObj->AsImage();
+  m_BlendType = blendType;
+  m_pObj2Device = pObj2Device;
+  CPDF_Dictionary* pOC = m_pImageObject->m_pImage->GetOC();
+  if (pOC && m_pRenderStatus->m_Options.m_pOCContext &&
+      !m_pRenderStatus->m_Options.m_pOCContext->CheckOCGVisible(pOC)) {
+    return FALSE;
+  }
+  m_ImageMatrix = m_pImageObject->m_Matrix;
+  m_ImageMatrix.Concat(*pObj2Device);
+  if (StartLoadDIBSource()) {
+    return TRUE;
+  }
+  return StartRenderDIBSource();
+}
+FX_BOOL CPDF_ImageRenderer::Start(CPDF_RenderStatus* pStatus,
+                                  const CFX_DIBSource* pDIBSource,
+                                  FX_ARGB bitmap_argb,
+                                  int bitmap_alpha,
+                                  const CFX_Matrix* pImage2Device,
+                                  FX_DWORD flags,
+                                  FX_BOOL bStdCS,
+                                  int blendType) {
+  m_pRenderStatus = pStatus;
+  m_pDIBSource = pDIBSource;
+  m_FillArgb = bitmap_argb;
+  m_BitmapAlpha = bitmap_alpha;
+  m_ImageMatrix = *pImage2Device;
+  m_Flags = flags;
+  m_bStdCS = bStdCS;
+  m_BlendType = blendType;
+  return StartDIBSource();
+}
+FX_BOOL CPDF_ImageRenderer::DrawPatternImage(const CFX_Matrix* pObj2Device) {
+  if (m_pRenderStatus->m_bPrint &&
+      !(m_pRenderStatus->m_pDevice->GetRenderCaps() & FXRC_BLEND_MODE)) {
+    m_Result = FALSE;
+    return FALSE;
+  }
+  FX_RECT rect = m_ImageMatrix.GetUnitRect().GetOutterRect();
+  rect.Intersect(m_pRenderStatus->m_pDevice->GetClipBox());
+  if (rect.IsEmpty()) {
+    return FALSE;
+  }
+  CFX_Matrix new_matrix = m_ImageMatrix;
+  new_matrix.TranslateI(-rect.left, -rect.top);
+  int width = rect.Width();
+  int height = rect.Height();
+  CFX_FxgeDevice bitmap_device1;
+  if (!bitmap_device1.Create(rect.Width(), rect.Height(), FXDIB_Rgb32)) {
+    return TRUE;
+  }
+  bitmap_device1.GetBitmap()->Clear(0xffffff);
+  {
+    CPDF_RenderStatus bitmap_render;
+    bitmap_render.Initialize(m_pRenderStatus->m_pContext, &bitmap_device1, NULL,
+                             NULL, NULL, NULL, &m_pRenderStatus->m_Options, 0,
+                             m_pRenderStatus->m_bDropObjects, NULL, TRUE);
+    CFX_Matrix patternDevice = *pObj2Device;
+    patternDevice.Translate((FX_FLOAT)-rect.left, (FX_FLOAT)-rect.top);
+    if (m_pPattern->m_PatternType == CPDF_Pattern::TILING) {
+      bitmap_render.DrawTilingPattern(
+          static_cast<CPDF_TilingPattern*>(m_pPattern), m_pImageObject,
+          &patternDevice, FALSE);
+    } else {
+      bitmap_render.DrawShadingPattern(
+          static_cast<CPDF_ShadingPattern*>(m_pPattern), m_pImageObject,
+          &patternDevice, FALSE);
+    }
+  }
+  {
+    CFX_FxgeDevice bitmap_device2;
+    if (!bitmap_device2.Create(rect.Width(), rect.Height(), FXDIB_8bppRgb)) {
+      return TRUE;
+    }
+    bitmap_device2.GetBitmap()->Clear(0);
+    CPDF_RenderStatus bitmap_render;
+    bitmap_render.Initialize(m_pRenderStatus->m_pContext, &bitmap_device2, NULL,
+                             NULL, NULL, NULL, NULL, 0,
+                             m_pRenderStatus->m_bDropObjects, NULL, TRUE);
+    CPDF_ImageRenderer image_render;
+    if (image_render.Start(&bitmap_render, m_pDIBSource, 0xffffffff, 255,
+                           &new_matrix, m_Flags, TRUE)) {
+      image_render.Continue(NULL);
+    }
+    if (m_Loader.m_MatteColor != 0xffffffff) {
+      int matte_r = FXARGB_R(m_Loader.m_MatteColor);
+      int matte_g = FXARGB_G(m_Loader.m_MatteColor);
+      int matte_b = FXARGB_B(m_Loader.m_MatteColor);
+      for (int row = 0; row < height; row++) {
+        uint8_t* dest_scan =
+            (uint8_t*)bitmap_device1.GetBitmap()->GetScanline(row);
+        const uint8_t* mask_scan = bitmap_device2.GetBitmap()->GetScanline(row);
+        for (int col = 0; col < width; col++) {
+          int alpha = *mask_scan++;
+          if (alpha) {
+            int orig = (*dest_scan - matte_b) * 255 / alpha + matte_b;
+            if (orig < 0) {
+              orig = 0;
+            } else if (orig > 255) {
+              orig = 255;
+            }
+            *dest_scan++ = orig;
+            orig = (*dest_scan - matte_g) * 255 / alpha + matte_g;
+            if (orig < 0) {
+              orig = 0;
+            } else if (orig > 255) {
+              orig = 255;
+            }
+            *dest_scan++ = orig;
+            orig = (*dest_scan - matte_r) * 255 / alpha + matte_r;
+            if (orig < 0) {
+              orig = 0;
+            } else if (orig > 255) {
+              orig = 255;
+            }
+            *dest_scan++ = orig;
+            dest_scan++;
+          } else {
+            dest_scan += 4;
+          }
+        }
+      }
+    }
+    bitmap_device2.GetBitmap()->ConvertFormat(FXDIB_8bppMask);
+    bitmap_device1.GetBitmap()->MultiplyAlpha(bitmap_device2.GetBitmap());
+    bitmap_device1.GetBitmap()->MultiplyAlpha(255);
+  }
+  m_pRenderStatus->m_pDevice->SetDIBits(bitmap_device1.GetBitmap(), rect.left,
+                                        rect.top, m_BlendType);
+  return FALSE;
+}
+FX_BOOL CPDF_ImageRenderer::DrawMaskedImage() {
+  if (m_pRenderStatus->m_bPrint &&
+      !(m_pRenderStatus->m_pDevice->GetRenderCaps() & FXRC_BLEND_MODE)) {
+    m_Result = FALSE;
+    return FALSE;
+  }
+  FX_RECT rect = m_ImageMatrix.GetUnitRect().GetOutterRect();
+  rect.Intersect(m_pRenderStatus->m_pDevice->GetClipBox());
+  if (rect.IsEmpty()) {
+    return FALSE;
+  }
+  CFX_Matrix new_matrix = m_ImageMatrix;
+  new_matrix.TranslateI(-rect.left, -rect.top);
+  int width = rect.Width();
+  int height = rect.Height();
+  CFX_FxgeDevice bitmap_device1;
+  if (!bitmap_device1.Create(width, height, FXDIB_Rgb32)) {
+    return TRUE;
+  }
+  bitmap_device1.GetBitmap()->Clear(0xffffff);
+  {
+    CPDF_RenderStatus bitmap_render;
+    bitmap_render.Initialize(m_pRenderStatus->m_pContext, &bitmap_device1, NULL,
+                             NULL, NULL, NULL, NULL, 0,
+                             m_pRenderStatus->m_bDropObjects, NULL, TRUE);
+    CPDF_ImageRenderer image_render;
+    if (image_render.Start(&bitmap_render, m_pDIBSource, 0, 255, &new_matrix,
+                           m_Flags, TRUE)) {
+      image_render.Continue(NULL);
+    }
+  }
+  {
+    CFX_FxgeDevice bitmap_device2;
+    if (!bitmap_device2.Create(width, height, FXDIB_8bppRgb)) {
+      return TRUE;
+    }
+    bitmap_device2.GetBitmap()->Clear(0);
+    CPDF_RenderStatus bitmap_render;
+    bitmap_render.Initialize(m_pRenderStatus->m_pContext, &bitmap_device2, NULL,
+                             NULL, NULL, NULL, NULL, 0,
+                             m_pRenderStatus->m_bDropObjects, NULL, TRUE);
+    CPDF_ImageRenderer image_render;
+    if (image_render.Start(&bitmap_render, m_Loader.m_pMask, 0xffffffff, 255,
+                           &new_matrix, m_Flags, TRUE)) {
+      image_render.Continue(NULL);
+    }
+    if (m_Loader.m_MatteColor != 0xffffffff) {
+      int matte_r = FXARGB_R(m_Loader.m_MatteColor);
+      int matte_g = FXARGB_G(m_Loader.m_MatteColor);
+      int matte_b = FXARGB_B(m_Loader.m_MatteColor);
+      for (int row = 0; row < height; row++) {
+        uint8_t* dest_scan =
+            (uint8_t*)bitmap_device1.GetBitmap()->GetScanline(row);
+        const uint8_t* mask_scan = bitmap_device2.GetBitmap()->GetScanline(row);
+        for (int col = 0; col < width; col++) {
+          int alpha = *mask_scan++;
+          if (alpha) {
+            int orig = (*dest_scan - matte_b) * 255 / alpha + matte_b;
+            if (orig < 0) {
+              orig = 0;
+            } else if (orig > 255) {
+              orig = 255;
+            }
+            *dest_scan++ = orig;
+            orig = (*dest_scan - matte_g) * 255 / alpha + matte_g;
+            if (orig < 0) {
+              orig = 0;
+            } else if (orig > 255) {
+              orig = 255;
+            }
+            *dest_scan++ = orig;
+            orig = (*dest_scan - matte_r) * 255 / alpha + matte_r;
+            if (orig < 0) {
+              orig = 0;
+            } else if (orig > 255) {
+              orig = 255;
+            }
+            *dest_scan++ = orig;
+            dest_scan++;
+          } else {
+            dest_scan += 4;
+          }
+        }
+      }
+    }
+    bitmap_device2.GetBitmap()->ConvertFormat(FXDIB_8bppMask);
+    bitmap_device1.GetBitmap()->MultiplyAlpha(bitmap_device2.GetBitmap());
+    if (m_BitmapAlpha < 255) {
+      bitmap_device1.GetBitmap()->MultiplyAlpha(m_BitmapAlpha);
+    }
+  }
+  m_pRenderStatus->m_pDevice->SetDIBits(bitmap_device1.GetBitmap(), rect.left,
+                                        rect.top, m_BlendType);
+  return FALSE;
+}
+FX_BOOL CPDF_ImageRenderer::StartDIBSource() {
+  if (!(m_Flags & RENDER_FORCE_DOWNSAMPLE) && m_pDIBSource->GetBPP() > 1) {
+    int image_size = m_pDIBSource->GetBPP() / 8 * m_pDIBSource->GetWidth() *
+                     m_pDIBSource->GetHeight();
+    if (image_size > FPDF_HUGE_IMAGE_SIZE &&
+        !(m_Flags & RENDER_FORCE_HALFTONE)) {
+      m_Flags |= RENDER_FORCE_DOWNSAMPLE;
+    }
+  }
+  if (m_pRenderStatus->m_pDevice->StartDIBits(
+          m_pDIBSource, m_BitmapAlpha, m_FillArgb, &m_ImageMatrix, m_Flags,
+          m_DeviceHandle, 0, NULL, m_BlendType)) {
+    if (m_DeviceHandle) {
+      m_Status = 3;
+      return TRUE;
+    }
+    return FALSE;
+  }
+  CFX_FloatRect image_rect_f = m_ImageMatrix.GetUnitRect();
+  FX_RECT image_rect = image_rect_f.GetOutterRect();
+  int dest_width = image_rect.Width();
+  int dest_height = image_rect.Height();
+  if ((FXSYS_fabs(m_ImageMatrix.b) >= 0.5f || m_ImageMatrix.a == 0) ||
+      (FXSYS_fabs(m_ImageMatrix.c) >= 0.5f || m_ImageMatrix.d == 0)) {
+    if (m_pRenderStatus->m_bPrint &&
+        !(m_pRenderStatus->m_pDevice->GetRenderCaps() & FXRC_BLEND_MODE)) {
+      m_Result = FALSE;
+      return FALSE;
+    }
+    FX_RECT clip_box = m_pRenderStatus->m_pDevice->GetClipBox();
+    clip_box.Intersect(image_rect);
+    m_Status = 2;
+    m_pTransformer = new CFX_ImageTransformer;
+    m_pTransformer->Start(m_pDIBSource, &m_ImageMatrix, m_Flags, &clip_box);
+    return TRUE;
+  }
+  if (m_ImageMatrix.a < 0) {
+    dest_width = -dest_width;
+  }
+  if (m_ImageMatrix.d > 0) {
+    dest_height = -dest_height;
+  }
+  int dest_left, dest_top;
+  dest_left = dest_width > 0 ? image_rect.left : image_rect.right;
+  dest_top = dest_height > 0 ? image_rect.top : image_rect.bottom;
+  if (m_pDIBSource->IsOpaqueImage() && m_BitmapAlpha == 255) {
+    if (m_pRenderStatus->m_pDevice->StretchDIBits(
+            m_pDIBSource, dest_left, dest_top, dest_width, dest_height, m_Flags,
+            NULL, m_BlendType)) {
+      return FALSE;
+    }
+  }
+  if (m_pDIBSource->IsAlphaMask()) {
+    if (m_BitmapAlpha != 255) {
+      m_FillArgb = FXARGB_MUL_ALPHA(m_FillArgb, m_BitmapAlpha);
+    }
+    if (m_pRenderStatus->m_pDevice->StretchBitMask(
+            m_pDIBSource, dest_left, dest_top, dest_width, dest_height,
+            m_FillArgb, m_Flags)) {
+      return FALSE;
+    }
+  }
+  if (m_pRenderStatus->m_bPrint &&
+      !(m_pRenderStatus->m_pDevice->GetRenderCaps() & FXRC_BLEND_MODE)) {
+    m_Result = FALSE;
+    return TRUE;
+  }
+  FX_RECT clip_box = m_pRenderStatus->m_pDevice->GetClipBox();
+  FX_RECT dest_rect = clip_box;
+  dest_rect.Intersect(image_rect);
+  FX_RECT dest_clip(
+      dest_rect.left - image_rect.left, dest_rect.top - image_rect.top,
+      dest_rect.right - image_rect.left, dest_rect.bottom - image_rect.top);
+  std::unique_ptr<CFX_DIBitmap> pStretched(
+      m_pDIBSource->StretchTo(dest_width, dest_height, m_Flags, &dest_clip));
+  if (pStretched) {
+    m_pRenderStatus->CompositeDIBitmap(pStretched.get(), dest_rect.left,
+                                       dest_rect.top, m_FillArgb, m_BitmapAlpha,
+                                       m_BlendType, FALSE);
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_ImageRenderer::StartBitmapAlpha() {
+  if (m_pDIBSource->IsOpaqueImage()) {
+    CFX_PathData path;
+    path.AppendRect(0, 0, 1, 1);
+    path.Transform(&m_ImageMatrix);
+    FX_DWORD fill_color =
+        ArgbEncode(0xff, m_BitmapAlpha, m_BitmapAlpha, m_BitmapAlpha);
+    m_pRenderStatus->m_pDevice->DrawPath(&path, NULL, NULL, fill_color, 0,
+                                         FXFILL_WINDING);
+  } else {
+    const CFX_DIBSource* pAlphaMask = m_pDIBSource->IsAlphaMask()
+                                          ? m_pDIBSource
+                                          : m_pDIBSource->GetAlphaMask();
+    if (FXSYS_fabs(m_ImageMatrix.b) >= 0.5f ||
+        FXSYS_fabs(m_ImageMatrix.c) >= 0.5f) {
+      int left, top;
+      std::unique_ptr<CFX_DIBitmap> pTransformed(
+          pAlphaMask->TransformTo(&m_ImageMatrix, left, top));
+      if (!pTransformed)
+        return TRUE;
+
+      m_pRenderStatus->m_pDevice->SetBitMask(
+          pTransformed.get(), left, top,
+          ArgbEncode(0xff, m_BitmapAlpha, m_BitmapAlpha, m_BitmapAlpha));
+    } else {
+      CFX_FloatRect image_rect_f = m_ImageMatrix.GetUnitRect();
+      FX_RECT image_rect = image_rect_f.GetOutterRect();
+      int dest_width =
+          m_ImageMatrix.a > 0 ? image_rect.Width() : -image_rect.Width();
+      int dest_height =
+          m_ImageMatrix.d > 0 ? -image_rect.Height() : image_rect.Height();
+      int left = dest_width > 0 ? image_rect.left : image_rect.right;
+      int top = dest_height > 0 ? image_rect.top : image_rect.bottom;
+      m_pRenderStatus->m_pDevice->StretchBitMask(
+          pAlphaMask, left, top, dest_width, dest_height,
+          ArgbEncode(0xff, m_BitmapAlpha, m_BitmapAlpha, m_BitmapAlpha));
+    }
+    if (m_pDIBSource != pAlphaMask) {
+      delete pAlphaMask;
+    }
+  }
+  return FALSE;
+}
+FX_BOOL CPDF_ImageRenderer::Continue(IFX_Pause* pPause) {
+  if (m_Status == 2) {
+    if (m_pTransformer->Continue(pPause)) {
+      return TRUE;
+    }
+    CFX_DIBitmap* pBitmap = m_pTransformer->m_Storer.Detach();
+    if (!pBitmap) {
+      return FALSE;
+    }
+    if (pBitmap->IsAlphaMask()) {
+      if (m_BitmapAlpha != 255) {
+        m_FillArgb = FXARGB_MUL_ALPHA(m_FillArgb, m_BitmapAlpha);
+      }
+      m_Result = m_pRenderStatus->m_pDevice->SetBitMask(
+          pBitmap, m_pTransformer->m_ResultLeft, m_pTransformer->m_ResultTop,
+          m_FillArgb);
+    } else {
+      if (m_BitmapAlpha != 255) {
+        pBitmap->MultiplyAlpha(m_BitmapAlpha);
+      }
+      m_Result = m_pRenderStatus->m_pDevice->SetDIBits(
+          pBitmap, m_pTransformer->m_ResultLeft, m_pTransformer->m_ResultTop,
+          m_BlendType);
+    }
+    delete pBitmap;
+    return FALSE;
+  }
+  if (m_Status == 3) {
+    return m_pRenderStatus->m_pDevice->ContinueDIBits(m_DeviceHandle, pPause);
+  }
+  if (m_Status == 4) {
+    if (m_Loader.Continue(m_LoadHandle, pPause)) {
+      return TRUE;
+    }
+    if (StartRenderDIBSource()) {
+      return Continue(pPause);
+    }
+  }
+  return FALSE;
+}
+ICodec_ScanlineDecoder* FPDFAPI_CreateFlateDecoder(
+    const uint8_t* src_buf,
+    FX_DWORD src_size,
+    int width,
+    int height,
+    int nComps,
+    int bpc,
+    const CPDF_Dictionary* pParams);
+CFX_DIBitmap* CPDF_RenderStatus::LoadSMask(CPDF_Dictionary* pSMaskDict,
+                                           FX_RECT* pClipRect,
+                                           const CFX_Matrix* pMatrix) {
+  if (!pSMaskDict) {
+    return NULL;
+  }
+  int width = pClipRect->right - pClipRect->left;
+  int height = pClipRect->bottom - pClipRect->top;
+  FX_BOOL bLuminosity = FALSE;
+  bLuminosity = pSMaskDict->GetConstStringBy("S") != "Alpha";
+  CPDF_Stream* pGroup = pSMaskDict->GetStreamBy("G");
+  if (!pGroup) {
+    return NULL;
+  }
+  std::unique_ptr<CPDF_Function> pFunc;
+  CPDF_Object* pFuncObj = pSMaskDict->GetElementValue("TR");
+  if (pFuncObj && (pFuncObj->IsDictionary() || pFuncObj->IsStream()))
+    pFunc.reset(CPDF_Function::Load(pFuncObj));
+
+  CFX_Matrix matrix = *pMatrix;
+  matrix.TranslateI(-pClipRect->left, -pClipRect->top);
+  CPDF_Form form(m_pContext->GetDocument(), m_pContext->GetPageResources(),
+                 pGroup);
+  form.ParseContent(NULL, NULL, NULL, NULL);
+  CFX_FxgeDevice bitmap_device;
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+  if (!bitmap_device.Create(width, height,
+                            bLuminosity ? FXDIB_Rgb32 : FXDIB_8bppMask)) {
+    return NULL;
+  }
+#else
+  if (!bitmap_device.Create(width, height,
+                            bLuminosity ? FXDIB_Rgb : FXDIB_8bppMask)) {
+    return NULL;
+  }
+#endif
+  CFX_DIBitmap& bitmap = *bitmap_device.GetBitmap();
+  CPDF_Object* pCSObj = NULL;
+  CPDF_ColorSpace* pCS = NULL;
+  if (bLuminosity) {
+    CPDF_Array* pBC = pSMaskDict->GetArrayBy("BC");
+    FX_ARGB back_color = 0xff000000;
+    if (pBC) {
+      CPDF_Dictionary* pDict = pGroup->GetDict();
+      if (pDict && pDict->GetDictBy("Group"))
+        pCSObj = pDict->GetDictBy("Group")->GetElementValue("CS");
+      else
+        pCSObj = NULL;
+      pCS = m_pContext->GetDocument()->LoadColorSpace(pCSObj);
+      if (pCS) {
+        FX_FLOAT R, G, B;
+        FX_DWORD comps = 8;
+        if (pCS->CountComponents() > comps) {
+          comps = pCS->CountComponents();
+        }
+        CFX_FixedBufGrow<FX_FLOAT, 8> float_array(comps);
+        FX_FLOAT* pFloats = float_array;
+        FX_SAFE_DWORD num_floats = comps;
+        num_floats *= sizeof(FX_FLOAT);
+        if (!num_floats.IsValid()) {
+          return NULL;
+        }
+        FXSYS_memset(pFloats, 0, num_floats.ValueOrDie());
+        int count = pBC->GetCount() > 8 ? 8 : pBC->GetCount();
+        for (int i = 0; i < count; i++) {
+          pFloats[i] = pBC->GetNumberAt(i);
+        }
+        pCS->GetRGB(pFloats, R, G, B);
+        back_color = 0xff000000 | ((int32_t)(R * 255) << 16) |
+                     ((int32_t)(G * 255) << 8) | (int32_t)(B * 255);
+        m_pContext->GetDocument()->GetPageData()->ReleaseColorSpace(pCSObj);
+      }
+    }
+    bitmap.Clear(back_color);
+  } else {
+    bitmap.Clear(0);
+  }
+  CPDF_Dictionary* pFormResource = NULL;
+  if (form.m_pFormDict) {
+    pFormResource = form.m_pFormDict->GetDictBy("Resources");
+  }
+  CPDF_RenderOptions options;
+  options.m_ColorMode = bLuminosity ? RENDER_COLOR_NORMAL : RENDER_COLOR_ALPHA;
+  CPDF_RenderStatus status;
+  status.Initialize(m_pContext, &bitmap_device, NULL, NULL, NULL, NULL,
+                    &options, 0, m_bDropObjects, pFormResource, TRUE, NULL, 0,
+                    pCS ? pCS->GetFamily() : 0, bLuminosity);
+  status.RenderObjectList(&form, &matrix);
+  std::unique_ptr<CFX_DIBitmap> pMask(new CFX_DIBitmap);
+  if (!pMask->Create(width, height, FXDIB_8bppMask))
+    return nullptr;
+
+  uint8_t* dest_buf = pMask->GetBuffer();
+  int dest_pitch = pMask->GetPitch();
+  uint8_t* src_buf = bitmap.GetBuffer();
+  int src_pitch = bitmap.GetPitch();
+  std::vector<uint8_t> transfers(256);
+  if (pFunc) {
+    CFX_FixedBufGrow<FX_FLOAT, 16> results(pFunc->CountOutputs());
+    for (int i = 0; i < 256; i++) {
+      FX_FLOAT input = (FX_FLOAT)i / 255.0f;
+      int nresult;
+      pFunc->Call(&input, 1, results, nresult);
+      transfers[i] = FXSYS_round(results[0] * 255);
+    }
+  } else {
+    for (int i = 0; i < 256; i++) {
+      transfers[i] = i;
+    }
+  }
+  if (bLuminosity) {
+    int Bpp = bitmap.GetBPP() / 8;
+    for (int row = 0; row < height; row++) {
+      uint8_t* dest_pos = dest_buf + row * dest_pitch;
+      uint8_t* src_pos = src_buf + row * src_pitch;
+      for (int col = 0; col < width; col++) {
+        *dest_pos++ = transfers[FXRGB2GRAY(src_pos[2], src_pos[1], *src_pos)];
+        src_pos += Bpp;
+      }
+    }
+  } else if (pFunc) {
+    int size = dest_pitch * height;
+    for (int i = 0; i < size; i++) {
+      dest_buf[i] = transfers[src_buf[i]];
+    }
+  } else {
+    FXSYS_memcpy(dest_buf, src_buf, dest_pitch * height);
+  }
+  return pMask.release();
+}
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp b/core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
new file mode 100644
index 0000000000..f1a06c4fc7
--- /dev/null
+++ b/core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
@@ -0,0 +1,1654 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfapi/fpdf_render/render_int.h"
+
+#include <algorithm>
+#include <memory>
+#include <vector>
+
+#include "core/fpdfapi/fpdf_page/pageint.h"
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_dictionary.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/fpdf_module.h"
+#include "core/include/fpdfapi/fpdf_pageobj.h"
+#include "core/include/fpdfapi/fpdf_render.h"
+#include "core/include/fxcodec/fx_codec.h"
+#include "core/include/fxcrt/fx_safe_types.h"
+#include "core/include/fxge/fx_ge.h"
+
+namespace {
+
+unsigned int GetBits8(const uint8_t* pData, uint64_t bitpos, size_t nbits) {
+  ASSERT(nbits == 1 || nbits == 2 || nbits == 4 || nbits == 8 || nbits == 16);
+  ASSERT((bitpos & (nbits - 1)) == 0);
+  unsigned int byte = pData[bitpos / 8];
+  if (nbits == 8) {
+    return byte;
+  } else if (nbits == 16) {
+    return byte * 256 + pData[bitpos / 8 + 1];
+  }
+
+  return (byte >> (8 - nbits - (bitpos % 8))) & ((1 << nbits) - 1);
+}
+
+FX_SAFE_DWORD CalculatePitch8(FX_DWORD bpc, FX_DWORD components, int width) {
+  FX_SAFE_DWORD pitch = bpc;
+  pitch *= components;
+  pitch *= width;
+  pitch += 7;
+  pitch /= 8;
+  return pitch;
+}
+
+FX_SAFE_DWORD CalculatePitch32(int bpp, int width) {
+  FX_SAFE_DWORD pitch = bpp;
+  pitch *= width;
+  pitch += 31;
+  pitch /= 32;  // quantized to number of 32-bit words.
+  pitch *= 4;   // and then back to bytes, (not just /8 in one step).
+  return pitch;
+}
+
+bool IsAllowedBPCValue(int bpc) {
+  return bpc == 1 || bpc == 2 || bpc == 4 || bpc == 8 || bpc == 16;
+}
+
+template <typename T>
+T ClampValue(T value, T max_value) {
+  value = std::min(value, max_value);
+  value = std::max<T>(0, value);
+  return value;
+}
+
+// Wrapper class to use with std::unique_ptr for CJPX_Decoder.
+class JpxBitMapContext {
+ public:
+  explicit JpxBitMapContext(ICodec_JpxModule* jpx_module)
+      : jpx_module_(jpx_module), decoder_(nullptr) {}
+
+  ~JpxBitMapContext() { jpx_module_->DestroyDecoder(decoder_); }
+
+  // Takes ownership of |decoder|.
+  void set_decoder(CJPX_Decoder* decoder) { decoder_ = decoder; }
+
+  CJPX_Decoder* decoder() { return decoder_; }
+
+ private:
+  ICodec_JpxModule* const jpx_module_;  // Weak pointer.
+  CJPX_Decoder* decoder_;               // Decoder, owned.
+
+  // Disallow evil constructors
+  JpxBitMapContext(const JpxBitMapContext&);
+  void operator=(const JpxBitMapContext&);
+};
+
+const int kMaxImageDimension = 0x01FFFF;
+
+}  // namespace
+
+CFX_DIBSource* CPDF_Image::LoadDIBSource(CFX_DIBSource** ppMask,
+                                         FX_DWORD* pMatteColor,
+                                         FX_BOOL bStdCS,
+                                         FX_DWORD GroupFamily,
+                                         FX_BOOL bLoadMask) const {
+  std::unique_ptr<CPDF_DIBSource> source(new CPDF_DIBSource);
+  if (source->Load(m_pDocument, m_pStream,
+                   reinterpret_cast<CPDF_DIBSource**>(ppMask), pMatteColor,
+                   nullptr, nullptr, bStdCS, GroupFamily, bLoadMask)) {
+    return source.release();
+  }
+  return nullptr;
+}
+
+CFX_DIBSource* CPDF_Image::DetachBitmap() {
+  CFX_DIBSource* pBitmap = m_pDIBSource;
+  m_pDIBSource = nullptr;
+  return pBitmap;
+}
+
+CFX_DIBSource* CPDF_Image::DetachMask() {
+  CFX_DIBSource* pBitmap = m_pMask;
+  m_pMask = nullptr;
+  return pBitmap;
+}
+
+FX_BOOL CPDF_Image::StartLoadDIBSource(CPDF_Dictionary* pFormResource,
+                                       CPDF_Dictionary* pPageResource,
+                                       FX_BOOL bStdCS,
+                                       FX_DWORD GroupFamily,
+                                       FX_BOOL bLoadMask) {
+  std::unique_ptr<CPDF_DIBSource> source(new CPDF_DIBSource);
+  int ret =
+      source->StartLoadDIBSource(m_pDocument, m_pStream, TRUE, pFormResource,
+                                 pPageResource, bStdCS, GroupFamily, bLoadMask);
+  if (ret == 2) {
+    m_pDIBSource = source.release();
+    return TRUE;
+  }
+  if (!ret) {
+    m_pDIBSource = nullptr;
+    return FALSE;
+  }
+  m_pMask = source->DetachMask();
+  m_MatteColor = source->GetMatteColor();
+  m_pDIBSource = source.release();
+  return FALSE;
+}
+
+FX_BOOL CPDF_Image::Continue(IFX_Pause* pPause) {
+  CPDF_DIBSource* pSource = static_cast<CPDF_DIBSource*>(m_pDIBSource);
+  int ret = pSource->ContinueLoadDIBSource(pPause);
+  if (ret == 2) {
+    return TRUE;
+  }
+  if (!ret) {
+    delete m_pDIBSource;
+    m_pDIBSource = nullptr;
+    return FALSE;
+  }
+  m_pMask = pSource->DetachMask();
+  m_MatteColor = pSource->GetMatteColor();
+  return FALSE;
+}
+
+CPDF_DIBSource::CPDF_DIBSource()
+    : m_pDocument(nullptr),
+      m_pStream(nullptr),
+      m_pDict(nullptr),
+      m_pColorSpace(nullptr),
+      m_Family(0),
+      m_bpc(0),
+      m_bpc_orig(0),
+      m_nComponents(0),
+      m_GroupFamily(0),
+      m_MatteColor(0),
+      m_bLoadMask(FALSE),
+      m_bDefaultDecode(TRUE),
+      m_bImageMask(FALSE),
+      m_bDoBpcCheck(TRUE),
+      m_bColorKey(FALSE),
+      m_bHasMask(FALSE),
+      m_bStdCS(FALSE),
+      m_pCompData(nullptr),
+      m_pLineBuf(nullptr),
+      m_pMaskedLine(nullptr),
+      m_pJbig2Context(nullptr),
+      m_pMask(nullptr),
+      m_pMaskStream(nullptr),
+      m_Status(0) {}
+
+CPDF_DIBSource::~CPDF_DIBSource() {
+  FX_Free(m_pMaskedLine);
+  FX_Free(m_pLineBuf);
+  m_pCachedBitmap.reset();
+  FX_Free(m_pCompData);
+  CPDF_ColorSpace* pCS = m_pColorSpace;
+  if (pCS && m_pDocument) {
+    m_pDocument->GetPageData()->ReleaseColorSpace(pCS->GetArray());
+  }
+  if (m_pJbig2Context) {
+    ICodec_Jbig2Module* pJbig2Module = CPDF_ModuleMgr::Get()->GetJbig2Module();
+    pJbig2Module->DestroyJbig2Context(m_pJbig2Context);
+  }
+}
+
+CFX_DIBitmap* CPDF_DIBSource::GetBitmap() const {
+  return m_pCachedBitmap ? m_pCachedBitmap.get() : Clone();
+}
+
+void CPDF_DIBSource::ReleaseBitmap(CFX_DIBitmap* pBitmap) const {
+  if (pBitmap && pBitmap != m_pCachedBitmap.get()) {
+    delete pBitmap;
+  }
+}
+
+FX_BOOL CPDF_DIBSource::Load(CPDF_Document* pDoc,
+                             const CPDF_Stream* pStream,
+                             CPDF_DIBSource** ppMask,
+                             FX_DWORD* pMatteColor,
+                             CPDF_Dictionary* pFormResources,
+                             CPDF_Dictionary* pPageResources,
+                             FX_BOOL bStdCS,
+                             FX_DWORD GroupFamily,
+                             FX_BOOL bLoadMask) {
+  if (!pStream) {
+    return FALSE;
+  }
+  m_pDocument = pDoc;
+  m_pDict = pStream->GetDict();
+  if (!m_pDict) {
+    return FALSE;
+  }
+  m_pStream = pStream;
+  m_Width = m_pDict->GetIntegerBy("Width");
+  m_Height = m_pDict->GetIntegerBy("Height");
+  if (m_Width <= 0 || m_Height <= 0 || m_Width > kMaxImageDimension ||
+      m_Height > kMaxImageDimension) {
+    return FALSE;
+  }
+  m_GroupFamily = GroupFamily;
+  m_bLoadMask = bLoadMask;
+  if (!LoadColorInfo(m_pStream->GetObjNum() != 0 ? nullptr : pFormResources,
+                     pPageResources)) {
+    return FALSE;
+  }
+  if (m_bDoBpcCheck && (m_bpc == 0 || m_nComponents == 0)) {
+    return FALSE;
+  }
+  FX_SAFE_DWORD src_size =
+      CalculatePitch8(m_bpc, m_nComponents, m_Width) * m_Height;
+  if (!src_size.IsValid()) {
+    return FALSE;
+  }
+  m_pStreamAcc.reset(new CPDF_StreamAcc);
+  m_pStreamAcc->LoadAllData(pStream, FALSE, src_size.ValueOrDie(), TRUE);
+  if (m_pStreamAcc->GetSize() == 0 || !m_pStreamAcc->GetData()) {
+    return FALSE;
+  }
+  if (!CreateDecoder()) {
+    return FALSE;
+  }
+  if (m_bImageMask) {
+    m_bpp = 1;
+    m_bpc = 1;
+    m_nComponents = 1;
+    m_AlphaFlag = 1;
+  } else if (m_bpc * m_nComponents == 1) {
+    m_bpp = 1;
+  } else if (m_bpc * m_nComponents <= 8) {
+    m_bpp = 8;
+  } else {
+    m_bpp = 24;
+  }
+  FX_SAFE_DWORD pitch = CalculatePitch32(m_bpp, m_Width);
+  if (!pitch.IsValid()) {
+    return FALSE;
+  }
+  m_pLineBuf = FX_Alloc(uint8_t, pitch.ValueOrDie());
+  if (m_pColorSpace && bStdCS) {
+    m_pColorSpace->EnableStdConversion(TRUE);
+  }
+  LoadPalette();
+  if (m_bColorKey) {
+    m_bpp = 32;
+    m_AlphaFlag = 2;
+    pitch = CalculatePitch32(m_bpp, m_Width);
+    if (!pitch.IsValid()) {
+      return FALSE;
+    }
+    m_pMaskedLine = FX_Alloc(uint8_t, pitch.ValueOrDie());
+  }
+  m_Pitch = pitch.ValueOrDie();
+  if (ppMask) {
+    *ppMask = LoadMask(*pMatteColor);
+  }
+  if (m_pColorSpace && bStdCS) {
+    m_pColorSpace->EnableStdConversion(FALSE);
+  }
+  return TRUE;
+}
+
+int CPDF_DIBSource::ContinueToLoadMask() {
+  if (m_bImageMask) {
+    m_bpp = 1;
+    m_bpc = 1;
+    m_nComponents = 1;
+    m_AlphaFlag = 1;
+  } else if (m_bpc * m_nComponents == 1) {
+    m_bpp = 1;
+  } else if (m_bpc * m_nComponents <= 8) {
+    m_bpp = 8;
+  } else {
+    m_bpp = 24;
+  }
+  if (!m_bpc || !m_nComponents) {
+    return 0;
+  }
+  FX_SAFE_DWORD pitch = CalculatePitch32(m_bpp, m_Width);
+  if (!pitch.IsValid()) {
+    return 0;
+  }
+  m_pLineBuf = FX_Alloc(uint8_t, pitch.ValueOrDie());
+  if (m_pColorSpace && m_bStdCS) {
+    m_pColorSpace->EnableStdConversion(TRUE);
+  }
+  LoadPalette();
+  if (m_bColorKey) {
+    m_bpp = 32;
+    m_AlphaFlag = 2;
+    pitch = CalculatePitch32(m_bpp, m_Width);
+    if (!pitch.IsValid()) {
+      return 0;
+    }
+    m_pMaskedLine = FX_Alloc(uint8_t, pitch.ValueOrDie());
+  }
+  m_Pitch = pitch.ValueOrDie();
+  return 1;
+}
+
+int CPDF_DIBSource::StartLoadDIBSource(CPDF_Document* pDoc,
+                                       const CPDF_Stream* pStream,
+                                       FX_BOOL bHasMask,
+                                       CPDF_Dictionary* pFormResources,
+                                       CPDF_Dictionary* pPageResources,
+                                       FX_BOOL bStdCS,
+                                       FX_DWORD GroupFamily,
+                                       FX_BOOL bLoadMask) {
+  if (!pStream) {
+    return 0;
+  }
+  m_pDocument = pDoc;
+  m_pDict = pStream->GetDict();
+  m_pStream = pStream;
+  m_bStdCS = bStdCS;
+  m_bHasMask = bHasMask;
+  m_Width = m_pDict->GetIntegerBy("Width");
+  m_Height = m_pDict->GetIntegerBy("Height");
+  if (m_Width <= 0 || m_Height <= 0 || m_Width > kMaxImageDimension ||
+      m_Height > kMaxImageDimension) {
+    return 0;
+  }
+  m_GroupFamily = GroupFamily;
+  m_bLoadMask = bLoadMask;
+  if (!LoadColorInfo(m_pStream->GetObjNum() != 0 ? nullptr : pFormResources,
+                     pPageResources)) {
+    return 0;
+  }
+  if (m_bDoBpcCheck && (m_bpc == 0 || m_nComponents == 0)) {
+    return 0;
+  }
+  FX_SAFE_DWORD src_size =
+      CalculatePitch8(m_bpc, m_nComponents, m_Width) * m_Height;
+  if (!src_size.IsValid()) {
+    return 0;
+  }
+  m_pStreamAcc.reset(new CPDF_StreamAcc);
+  m_pStreamAcc->LoadAllData(pStream, FALSE, src_size.ValueOrDie(), TRUE);
+  if (m_pStreamAcc->GetSize() == 0 || !m_pStreamAcc->GetData()) {
+    return 0;
+  }
+  int ret = CreateDecoder();
+  if (!ret)
+    return ret;
+
+  if (ret != 1) {
+    if (!ContinueToLoadMask()) {
+      return 0;
+    }
+    if (m_bHasMask) {
+      StratLoadMask();
+    }
+    return ret;
+  }
+  if (!ContinueToLoadMask()) {
+    return 0;
+  }
+  if (m_bHasMask) {
+    ret = StratLoadMask();
+  }
+  if (ret == 2) {
+    return ret;
+  }
+  if (m_pColorSpace && m_bStdCS) {
+    m_pColorSpace->EnableStdConversion(FALSE);
+  }
+  return ret;
+}
+
+int CPDF_DIBSource::ContinueLoadDIBSource(IFX_Pause* pPause) {
+  FXCODEC_STATUS ret;
+  if (m_Status == 1) {
+    const CFX_ByteString& decoder = m_pStreamAcc->GetImageDecoder();
+    if (decoder == "JPXDecode") {
+      return 0;
+    }
+    ICodec_Jbig2Module* pJbig2Module = CPDF_ModuleMgr::Get()->GetJbig2Module();
+    if (!m_pJbig2Context) {
+      m_pJbig2Context = pJbig2Module->CreateJbig2Context();
+      if (m_pStreamAcc->GetImageParam()) {
+        CPDF_Stream* pGlobals =
+            m_pStreamAcc->GetImageParam()->GetStreamBy("JBIG2Globals");
+        if (pGlobals) {
+          m_pGlobalStream.reset(new CPDF_StreamAcc);
+          m_pGlobalStream->LoadAllData(pGlobals, FALSE);
+        }
+      }
+      ret = pJbig2Module->StartDecode(
+          m_pJbig2Context, m_pDocument, m_Width, m_Height, m_pStreamAcc.get(),
+          m_pGlobalStream.get(), m_pCachedBitmap->GetBuffer(),
+          m_pCachedBitmap->GetPitch(), pPause);
+      if (ret < 0) {
+        m_pCachedBitmap.reset();
+        m_pGlobalStream.reset();
+        pJbig2Module->DestroyJbig2Context(m_pJbig2Context);
+        m_pJbig2Context = nullptr;
+        return 0;
+      }
+      if (ret == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
+        return 2;
+      }
+      int ret1 = 1;
+      if (m_bHasMask) {
+        ret1 = ContinueLoadMaskDIB(pPause);
+        m_Status = 2;
+      }
+      if (ret1 == 2) {
+        return ret1;
+      }
+      if (m_pColorSpace && m_bStdCS) {
+        m_pColorSpace->EnableStdConversion(FALSE);
+      }
+      return ret1;
+    }
+    FXCODEC_STATUS ret = pJbig2Module->ContinueDecode(m_pJbig2Context, pPause);
+    if (ret < 0) {
+      m_pCachedBitmap.reset();
+      m_pGlobalStream.reset();
+      pJbig2Module->DestroyJbig2Context(m_pJbig2Context);
+      m_pJbig2Context = nullptr;
+      return 0;
+    }
+    if (ret == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
+      return 2;
+    }
+    int ret1 = 1;
+    if (m_bHasMask) {
+      ret1 = ContinueLoadMaskDIB(pPause);
+      m_Status = 2;
+    }
+    if (ret1 == 2) {
+      return ret1;
+    }
+    if (m_pColorSpace && m_bStdCS) {
+      m_pColorSpace->EnableStdConversion(FALSE);
+    }
+    return ret1;
+  }
+  if (m_Status == 2) {
+    return ContinueLoadMaskDIB(pPause);
+  }
+  return 0;
+}
+
+bool CPDF_DIBSource::LoadColorInfo(const CPDF_Dictionary* pFormResources,
+                                   const CPDF_Dictionary* pPageResources) {
+  m_bpc_orig = m_pDict->GetIntegerBy("BitsPerComponent");
+  if (m_pDict->GetIntegerBy("ImageMask"))
+    m_bImageMask = TRUE;
+
+  if (m_bImageMask || !m_pDict->KeyExist("ColorSpace")) {
+    if (!m_bImageMask) {
+      CPDF_Object* pFilter = m_pDict->GetElementValue("Filter");
+      if (pFilter) {
+        CFX_ByteString filter;
+        if (pFilter->IsName()) {
+          filter = pFilter->GetString();
+        } else if (CPDF_Array* pArray = pFilter->AsArray()) {
+          filter = pArray->GetStringAt(pArray->GetCount() - 1);
+        }
+
+        if (filter == "JPXDecode") {
+          m_bDoBpcCheck = FALSE;
+          return true;
+        }
+      }
+    }
+    m_bImageMask = TRUE;
+    m_bpc = m_nComponents = 1;
+    CPDF_Array* pDecode = m_pDict->GetArrayBy("Decode");
+    m_bDefaultDecode = !pDecode || !pDecode->GetIntegerAt(0);
+    return true;
+  }
+
+  CPDF_Object* pCSObj = m_pDict->GetElementValue("ColorSpace");
+  if (!pCSObj)
+    return false;
+
+  CPDF_DocPageData* pDocPageData = m_pDocument->GetPageData();
+  if (pFormResources)
+    m_pColorSpace = pDocPageData->GetColorSpace(pCSObj, pFormResources);
+  if (!m_pColorSpace)
+    m_pColorSpace = pDocPageData->GetColorSpace(pCSObj, pPageResources);
+  if (!m_pColorSpace)
+    return false;
+
+  m_Family = m_pColorSpace->GetFamily();
+  m_nComponents = m_pColorSpace->CountComponents();
+  if (m_Family == PDFCS_ICCBASED && pCSObj->IsName()) {
+    CFX_ByteString cs = pCSObj->GetString();
+    if (cs == "DeviceGray") {
+      m_nComponents = 1;
+    } else if (cs == "DeviceRGB") {
+      m_nComponents = 3;
+    } else if (cs == "DeviceCMYK") {
+      m_nComponents = 4;
+    }
+  }
+  ValidateDictParam();
+  m_pCompData = GetDecodeAndMaskArray(m_bDefaultDecode, m_bColorKey);
+  return !!m_pCompData;
+}
+
+DIB_COMP_DATA* CPDF_DIBSource::GetDecodeAndMaskArray(FX_BOOL& bDefaultDecode,
+                                                     FX_BOOL& bColorKey) {
+  if (!m_pColorSpace) {
+    return nullptr;
+  }
+  DIB_COMP_DATA* pCompData = FX_Alloc(DIB_COMP_DATA, m_nComponents);
+  int max_data = (1 << m_bpc) - 1;
+  CPDF_Array* pDecode = m_pDict->GetArrayBy("Decode");
+  if (pDecode) {
+    for (FX_DWORD i = 0; i < m_nComponents; i++) {
+      pCompData[i].m_DecodeMin = pDecode->GetNumberAt(i * 2);
+      FX_FLOAT max = pDecode->GetNumberAt(i * 2 + 1);
+      pCompData[i].m_DecodeStep = (max - pCompData[i].m_DecodeMin) / max_data;
+      FX_FLOAT def_value;
+      FX_FLOAT def_min;
+      FX_FLOAT def_max;
+      m_pColorSpace->GetDefaultValue(i, def_value, def_min, def_max);
+      if (m_Family == PDFCS_INDEXED) {
+        def_max = max_data;
+      }
+      if (def_min != pCompData[i].m_DecodeMin || def_max != max) {
+        bDefaultDecode = FALSE;
+      }
+    }
+  } else {
+    for (FX_DWORD i = 0; i < m_nComponents; i++) {
+      FX_FLOAT def_value;
+      m_pColorSpace->GetDefaultValue(i, def_value, pCompData[i].m_DecodeMin,
+                                     pCompData[i].m_DecodeStep);
+      if (m_Family == PDFCS_INDEXED) {
+        pCompData[i].m_DecodeStep = max_data;
+      }
+      pCompData[i].m_DecodeStep =
+          (pCompData[i].m_DecodeStep - pCompData[i].m_DecodeMin) / max_data;
+    }
+  }
+  if (!m_pDict->KeyExist("SMask")) {
+    CPDF_Object* pMask = m_pDict->GetElementValue("Mask");
+    if (!pMask) {
+      return pCompData;
+    }
+    if (CPDF_Array* pArray = pMask->AsArray()) {
+      if (pArray->GetCount() >= m_nComponents * 2) {
+        for (FX_DWORD i = 0; i < m_nComponents; i++) {
+          int min_num = pArray->GetIntegerAt(i * 2);
+          int max_num = pArray->GetIntegerAt(i * 2 + 1);
+          pCompData[i].m_ColorKeyMin = std::max(min_num, 0);
+          pCompData[i].m_ColorKeyMax = std::min(max_num, max_data);
+        }
+      }
+      bColorKey = TRUE;
+    }
+  }
+  return pCompData;
+}
+
+ICodec_ScanlineDecoder* FPDFAPI_CreateFaxDecoder(
+    const uint8_t* src_buf,
+    FX_DWORD src_size,
+    int width,
+    int height,
+    const CPDF_Dictionary* pParams);
+
+ICodec_ScanlineDecoder* FPDFAPI_CreateFlateDecoder(
+    const uint8_t* src_buf,
+    FX_DWORD src_size,
+    int width,
+    int height,
+    int nComps,
+    int bpc,
+    const CPDF_Dictionary* pParams);
+
+int CPDF_DIBSource::CreateDecoder() {
+  const CFX_ByteString& decoder = m_pStreamAcc->GetImageDecoder();
+  if (decoder.IsEmpty()) {
+    return 1;
+  }
+  if (m_bDoBpcCheck && m_bpc == 0) {
+    return 0;
+  }
+  const uint8_t* src_data = m_pStreamAcc->GetData();
+  FX_DWORD src_size = m_pStreamAcc->GetSize();
+  const CPDF_Dictionary* pParams = m_pStreamAcc->GetImageParam();
+  if (decoder == "CCITTFaxDecode") {
+    m_pDecoder.reset(FPDFAPI_CreateFaxDecoder(src_data, src_size, m_Width,
+                                              m_Height, pParams));
+  } else if (decoder == "DCTDecode") {
+    m_pDecoder.reset(CPDF_ModuleMgr::Get()->GetJpegModule()->CreateDecoder(
+        src_data, src_size, m_Width, m_Height, m_nComponents,
+        pParams ? pParams->GetIntegerBy("ColorTransform", 1) : 1));
+    if (!m_pDecoder) {
+      FX_BOOL bTransform = FALSE;
+      int comps;
+      int bpc;
+      ICodec_JpegModule* pJpegModule = CPDF_ModuleMgr::Get()->GetJpegModule();
+      if (pJpegModule->LoadInfo(src_data, src_size, m_Width, m_Height, comps,
+                                bpc, bTransform)) {
+        if (m_nComponents != static_cast<FX_DWORD>(comps)) {
+          FX_Free(m_pCompData);
+          m_nComponents = static_cast<FX_DWORD>(comps);
+          if (m_Family == PDFCS_LAB && m_nComponents != 3) {
+            m_pCompData = nullptr;
+            return 0;
+          }
+          m_pCompData = GetDecodeAndMaskArray(m_bDefaultDecode, m_bColorKey);
+          if (!m_pCompData) {
+            return 0;
+          }
+        }
+        m_bpc = bpc;
+        m_pDecoder.reset(CPDF_ModuleMgr::Get()->GetJpegModule()->CreateDecoder(
+            src_data, src_size, m_Width, m_Height, m_nComponents, bTransform));
+      }
+    }
+  } else if (decoder == "FlateDecode") {
+    m_pDecoder.reset(FPDFAPI_CreateFlateDecoder(
+        src_data, src_size, m_Width, m_Height, m_nComponents, m_bpc, pParams));
+  } else if (decoder == "JPXDecode") {
+    LoadJpxBitmap();
+    return m_pCachedBitmap ? 1 : 0;
+  } else if (decoder == "JBIG2Decode") {
+    m_pCachedBitmap.reset(new CFX_DIBitmap);
+    if (!m_pCachedBitmap->Create(
+            m_Width, m_Height, m_bImageMask ? FXDIB_1bppMask : FXDIB_1bppRgb)) {
+      m_pCachedBitmap.reset();
+      return 0;
+    }
+    m_Status = 1;
+    return 2;
+  } else if (decoder == "RunLengthDecode") {
+    m_pDecoder.reset(CPDF_ModuleMgr::Get()
+                         ->GetCodecModule()
+                         ->GetBasicModule()
+                         ->CreateRunLengthDecoder(src_data, src_size, m_Width,
+                                                  m_Height, m_nComponents,
+                                                  m_bpc));
+  }
+  if (!m_pDecoder)
+    return 0;
+
+  FX_SAFE_DWORD requested_pitch =
+      CalculatePitch8(m_bpc, m_nComponents, m_Width);
+  if (!requested_pitch.IsValid()) {
+    return 0;
+  }
+  FX_SAFE_DWORD provided_pitch = CalculatePitch8(
+      m_pDecoder->GetBPC(), m_pDecoder->CountComps(), m_pDecoder->GetWidth());
+  if (!provided_pitch.IsValid()) {
+    return 0;
+  }
+  if (provided_pitch.ValueOrDie() < requested_pitch.ValueOrDie()) {
+    return 0;
+  }
+  return 1;
+}
+
+void CPDF_DIBSource::LoadJpxBitmap() {
+  ICodec_JpxModule* pJpxModule = CPDF_ModuleMgr::Get()->GetJpxModule();
+  if (!pJpxModule)
+    return;
+
+  std::unique_ptr<JpxBitMapContext> context(new JpxBitMapContext(pJpxModule));
+  context->set_decoder(pJpxModule->CreateDecoder(
+      m_pStreamAcc->GetData(), m_pStreamAcc->GetSize(), m_pColorSpace));
+  if (!context->decoder())
+    return;
+
+  FX_DWORD width = 0;
+  FX_DWORD height = 0;
+  FX_DWORD components = 0;
+  pJpxModule->GetImageInfo(context->decoder(), &width, &height, &components);
+  if (static_cast<int>(width) < m_Width || static_cast<int>(height) < m_Height)
+    return;
+
+  FX_BOOL bSwapRGB = FALSE;
+  if (m_pColorSpace) {
+    if (components != m_pColorSpace->CountComponents())
+      return;
+
+    if (m_pColorSpace == CPDF_ColorSpace::GetStockCS(PDFCS_DEVICERGB)) {
+      bSwapRGB = TRUE;
+      m_pColorSpace = nullptr;
+    }
+  } else {
+    if (components == 3) {
+      bSwapRGB = TRUE;
+    } else if (components == 4) {
+      m_pColorSpace = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICECMYK);
+    }
+    m_nComponents = components;
+  }
+
+  FXDIB_Format format;
+  if (components == 1) {
+    format = FXDIB_8bppRgb;
+  } else if (components <= 3) {
+    format = FXDIB_Rgb;
+  } else if (components == 4) {
+    format = FXDIB_Rgb32;
+  } else {
+    width = (width * components + 2) / 3;
+    format = FXDIB_Rgb;
+  }
+
+  m_pCachedBitmap.reset(new CFX_DIBitmap);
+  if (!m_pCachedBitmap->Create(width, height, format)) {
+    m_pCachedBitmap.reset();
+    return;
+  }
+  m_pCachedBitmap->Clear(0xFFFFFFFF);
+  std::vector<uint8_t> output_offsets(components);
+  for (FX_DWORD i = 0; i < components; ++i)
+    output_offsets[i] = i;
+  if (bSwapRGB) {
+    output_offsets[0] = 2;
+    output_offsets[2] = 0;
+  }
+  if (!pJpxModule->Decode(context->decoder(), m_pCachedBitmap->GetBuffer(),
+                          m_pCachedBitmap->GetPitch(), output_offsets)) {
+    m_pCachedBitmap.reset();
+    return;
+  }
+  if (m_pColorSpace && m_pColorSpace->GetFamily() == PDFCS_INDEXED &&
+      m_bpc < 8) {
+    int scale = 8 - m_bpc;
+    for (FX_DWORD row = 0; row < height; ++row) {
+      uint8_t* scanline =
+          const_cast<uint8_t*>(m_pCachedBitmap->GetScanline(row));
+      for (FX_DWORD col = 0; col < width; ++col) {
+        *scanline = (*scanline) >> scale;
+        ++scanline;
+      }
+    }
+  }
+  m_bpc = 8;
+}
+
+CPDF_DIBSource* CPDF_DIBSource::LoadMask(FX_DWORD& MatteColor) {
+  MatteColor = 0xFFFFFFFF;
+  CPDF_Stream* pSoftMask = m_pDict->GetStreamBy("SMask");
+  if (pSoftMask) {
+    CPDF_Array* pMatte = pSoftMask->GetDict()->GetArrayBy("Matte");
+    if (pMatte && m_pColorSpace &&
+        m_pColorSpace->CountComponents() <= m_nComponents) {
+      std::vector<FX_FLOAT> colors(m_nComponents);
+      for (FX_DWORD i = 0; i < m_nComponents; i++) {
+        colors[i] = pMatte->GetFloatAt(i);
+      }
+      FX_FLOAT R, G, B;
+      m_pColorSpace->GetRGB(colors.data(), R, G, B);
+      MatteColor = FXARGB_MAKE(0, FXSYS_round(R * 255), FXSYS_round(G * 255),
+                               FXSYS_round(B * 255));
+    }
+    return LoadMaskDIB(pSoftMask);
+  }
+
+  if (CPDF_Stream* pStream = ToStream(m_pDict->GetElementValue("Mask")))
+    return LoadMaskDIB(pStream);
+
+  return nullptr;
+}
+
+int CPDF_DIBSource::StratLoadMask() {
+  m_MatteColor = 0XFFFFFFFF;
+  m_pMaskStream = m_pDict->GetStreamBy("SMask");
+  if (m_pMaskStream) {
+    CPDF_Array* pMatte = m_pMaskStream->GetDict()->GetArrayBy("Matte");
+    if (pMatte && m_pColorSpace &&
+        m_pColorSpace->CountComponents() <= m_nComponents) {
+      FX_FLOAT R, G, B;
+      std::vector<FX_FLOAT> colors(m_nComponents);
+      for (FX_DWORD i = 0; i < m_nComponents; i++) {
+        colors[i] = pMatte->GetFloatAt(i);
+      }
+      m_pColorSpace->GetRGB(colors.data(), R, G, B);
+      m_MatteColor = FXARGB_MAKE(0, FXSYS_round(R * 255), FXSYS_round(G * 255),
+                                 FXSYS_round(B * 255));
+    }
+    return StartLoadMaskDIB();
+  }
+
+  m_pMaskStream = ToStream(m_pDict->GetElementValue("Mask"));
+  return m_pMaskStream ? StartLoadMaskDIB() : 1;
+}
+
+int CPDF_DIBSource::ContinueLoadMaskDIB(IFX_Pause* pPause) {
+  if (!m_pMask) {
+    return 1;
+  }
+  int ret = m_pMask->ContinueLoadDIBSource(pPause);
+  if (ret == 2) {
+    return ret;
+  }
+  if (m_pColorSpace && m_bStdCS) {
+    m_pColorSpace->EnableStdConversion(FALSE);
+  }
+  if (!ret) {
+    delete m_pMask;
+    m_pMask = nullptr;
+    return ret;
+  }
+  return 1;
+}
+
+CPDF_DIBSource* CPDF_DIBSource::DetachMask() {
+  CPDF_DIBSource* pDIBSource = m_pMask;
+  m_pMask = nullptr;
+  return pDIBSource;
+}
+
+CPDF_DIBSource* CPDF_DIBSource::LoadMaskDIB(CPDF_Stream* pMask) {
+  CPDF_DIBSource* pMaskSource = new CPDF_DIBSource;
+  if (!pMaskSource->Load(m_pDocument, pMask, nullptr, nullptr, nullptr, nullptr,
+                         TRUE)) {
+    delete pMaskSource;
+    return nullptr;
+  }
+  return pMaskSource;
+}
+
+int CPDF_DIBSource::StartLoadMaskDIB() {
+  m_pMask = new CPDF_DIBSource;
+  int ret = m_pMask->StartLoadDIBSource(m_pDocument, m_pMaskStream, FALSE,
+                                        nullptr, nullptr, TRUE);
+  if (ret == 2) {
+    if (m_Status == 0)
+      m_Status = 2;
+    return 2;
+  }
+  if (!ret) {
+    delete m_pMask;
+    m_pMask = nullptr;
+    return 1;
+  }
+  return 1;
+}
+
+void CPDF_DIBSource::LoadPalette() {
+  if (m_bpc == 0) {
+    return;
+  }
+  if (m_bpc * m_nComponents > 8) {
+    return;
+  }
+  if (!m_pColorSpace) {
+    return;
+  }
+  if (m_bpc * m_nComponents == 1) {
+    if (m_bDefaultDecode &&
+        (m_Family == PDFCS_DEVICEGRAY || m_Family == PDFCS_DEVICERGB)) {
+      return;
+    }
+    if (m_pColorSpace->CountComponents() > 3) {
+      return;
+    }
+    FX_FLOAT color_values[3];
+    color_values[0] = m_pCompData[0].m_DecodeMin;
+    color_values[1] = color_values[2] = color_values[0];
+    FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
+    m_pColorSpace->GetRGB(color_values, R, G, B);
+    FX_ARGB argb0 = ArgbEncode(255, FXSYS_round(R * 255), FXSYS_round(G * 255),
+                               FXSYS_round(B * 255));
+    color_values[0] += m_pCompData[0].m_DecodeStep;
+    color_values[1] += m_pCompData[0].m_DecodeStep;
+    color_values[2] += m_pCompData[0].m_DecodeStep;
+    m_pColorSpace->GetRGB(color_values, R, G, B);
+    FX_ARGB argb1 = ArgbEncode(255, FXSYS_round(R * 255), FXSYS_round(G * 255),
+                               FXSYS_round(B * 255));
+    if (argb0 != 0xFF000000 || argb1 != 0xFFFFFFFF) {
+      SetPaletteArgb(0, argb0);
+      SetPaletteArgb(1, argb1);
+    }
+    return;
+  }
+  if (m_pColorSpace == CPDF_ColorSpace::GetStockCS(PDFCS_DEVICEGRAY) &&
+      m_bpc == 8 && m_bDefaultDecode) {
+  } else {
+    int palette_count = 1 << (m_bpc * m_nComponents);
+    CFX_FixedBufGrow<FX_FLOAT, 16> color_values(m_nComponents);
+    FX_FLOAT* color_value = color_values;
+    for (int i = 0; i < palette_count; i++) {
+      int color_data = i;
+      for (FX_DWORD j = 0; j < m_nComponents; j++) {
+        int encoded_component = color_data % (1 << m_bpc);
+        color_data /= 1 << m_bpc;
+        color_value[j] = m_pCompData[j].m_DecodeMin +
+                         m_pCompData[j].m_DecodeStep * encoded_component;
+      }
+      FX_FLOAT R = 0, G = 0, B = 0;
+      if (m_nComponents == 1 && m_Family == PDFCS_ICCBASED &&
+          m_pColorSpace->CountComponents() > 1) {
+        int nComponents = m_pColorSpace->CountComponents();
+        std::vector<FX_FLOAT> temp_buf(nComponents);
+        for (int i = 0; i < nComponents; i++) {
+          temp_buf[i] = *color_value;
+        }
+        m_pColorSpace->GetRGB(temp_buf.data(), R, G, B);
+      } else {
+        m_pColorSpace->GetRGB(color_value, R, G, B);
+      }
+      SetPaletteArgb(i, ArgbEncode(255, FXSYS_round(R * 255),
+                                   FXSYS_round(G * 255), FXSYS_round(B * 255)));
+    }
+  }
+}
+
+void CPDF_DIBSource::ValidateDictParam() {
+  m_bpc = m_bpc_orig;
+  CPDF_Object* pFilter = m_pDict->GetElementValue("Filter");
+  if (pFilter) {
+    if (pFilter->IsName()) {
+      CFX_ByteString filter = pFilter->GetString();
+      if (filter == "CCITTFaxDecode" || filter == "JBIG2Decode") {
+        m_bpc = 1;
+        m_nComponents = 1;
+      } else if (filter == "RunLengthDecode") {
+        if (m_bpc != 1) {
+          m_bpc = 8;
+        }
+      } else if (filter == "DCTDecode") {
+        m_bpc = 8;
+      }
+    } else if (CPDF_Array* pArray = pFilter->AsArray()) {
+      CFX_ByteString filter = pArray->GetStringAt(pArray->GetCount() - 1);
+      if (filter == "CCITTFaxDecode" || filter == "JBIG2Decode") {
+        m_bpc = 1;
+        m_nComponents = 1;
+      } else if (filter == "DCTDecode") {
+        // Previously, filter == "RunLengthDecode" was checked in the "if"
+        // statement as well, but too many documents don't conform to it.
+        m_bpc = 8;
+      }
+    }
+  }
+
+  if (!IsAllowedBPCValue(m_bpc))
+    m_bpc = 0;
+}
+
+void CPDF_DIBSource::TranslateScanline24bpp(uint8_t* dest_scan,
+                                            const uint8_t* src_scan) const {
+  if (m_bpc == 0) {
+    return;
+  }
+  unsigned int max_data = (1 << m_bpc) - 1;
+  if (m_bDefaultDecode) {
+    if (m_Family == PDFCS_DEVICERGB || m_Family == PDFCS_CALRGB) {
+      const uint8_t* src_pos = src_scan;
+      switch (m_bpc) {
+        case 16:
+          for (int col = 0; col < m_Width; col++) {
+            *dest_scan++ = src_pos[4];
+            *dest_scan++ = src_pos[2];
+            *dest_scan++ = *src_pos;
+            src_pos += 6;
+          }
+          break;
+        case 8:
+          for (int column = 0; column < m_Width; column++) {
+            *dest_scan++ = src_pos[2];
+            *dest_scan++ = src_pos[1];
+            *dest_scan++ = *src_pos;
+            src_pos += 3;
+          }
+          break;
+        default:
+          uint64_t src_bit_pos = 0;
+          size_t dest_byte_pos = 0;
+          for (int column = 0; column < m_Width; column++) {
+            unsigned int R = GetBits8(src_scan, src_bit_pos, m_bpc);
+            src_bit_pos += m_bpc;
+            unsigned int G = GetBits8(src_scan, src_bit_pos, m_bpc);
+            src_bit_pos += m_bpc;
+            unsigned int B = GetBits8(src_scan, src_bit_pos, m_bpc);
+            src_bit_pos += m_bpc;
+            R = std::min(R, max_data);
+            G = std::min(G, max_data);
+            B = std::min(B, max_data);
+            dest_scan[dest_byte_pos] = B * 255 / max_data;
+            dest_scan[dest_byte_pos + 1] = G * 255 / max_data;
+            dest_scan[dest_byte_pos + 2] = R * 255 / max_data;
+            dest_byte_pos += 3;
+          }
+          break;
+      }
+      return;
+    }
+    if (m_bpc == 8) {
+      if (m_nComponents == m_pColorSpace->CountComponents())
+        m_pColorSpace->TranslateImageLine(dest_scan, src_scan, m_Width, m_Width,
+                                          m_Height, TransMask());
+      return;
+    }
+  }
+  CFX_FixedBufGrow<FX_FLOAT, 16> color_values1(m_nComponents);
+  FX_FLOAT* color_values = color_values1;
+  FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
+  if (m_bpc == 8) {
+    uint64_t src_byte_pos = 0;
+    size_t dest_byte_pos = 0;
+    for (int column = 0; column < m_Width; column++) {
+      for (FX_DWORD color = 0; color < m_nComponents; color++) {
+        uint8_t data = src_scan[src_byte_pos++];
+        color_values[color] = m_pCompData[color].m_DecodeMin +
+                              m_pCompData[color].m_DecodeStep * data;
+      }
+      if (TransMask()) {
+        FX_FLOAT k = 1.0f - color_values[3];
+        R = (1.0f - color_values[0]) * k;
+        G = (1.0f - color_values[1]) * k;
+        B = (1.0f - color_values[2]) * k;
+      } else {
+        m_pColorSpace->GetRGB(color_values, R, G, B);
+      }
+      R = ClampValue(R, 1.0f);
+      G = ClampValue(G, 1.0f);
+      B = ClampValue(B, 1.0f);
+      dest_scan[dest_byte_pos] = static_cast<uint8_t>(B * 255);
+      dest_scan[dest_byte_pos + 1] = static_cast<uint8_t>(G * 255);
+      dest_scan[dest_byte_pos + 2] = static_cast<uint8_t>(R * 255);
+      dest_byte_pos += 3;
+    }
+  } else {
+    uint64_t src_bit_pos = 0;
+    size_t dest_byte_pos = 0;
+    for (int column = 0; column < m_Width; column++) {
+      for (FX_DWORD color = 0; color < m_nComponents; color++) {
+        unsigned int data = GetBits8(src_scan, src_bit_pos, m_bpc);
+        color_values[color] = m_pCompData[color].m_DecodeMin +
+                              m_pCompData[color].m_DecodeStep * data;
+        src_bit_pos += m_bpc;
+      }
+      if (TransMask()) {
+        FX_FLOAT k = 1.0f - color_values[3];
+        R = (1.0f - color_values[0]) * k;
+        G = (1.0f - color_values[1]) * k;
+        B = (1.0f - color_values[2]) * k;
+      } else {
+        m_pColorSpace->GetRGB(color_values, R, G, B);
+      }
+      R = ClampValue(R, 1.0f);
+      G = ClampValue(G, 1.0f);
+      B = ClampValue(B, 1.0f);
+      dest_scan[dest_byte_pos] = static_cast<uint8_t>(B * 255);
+      dest_scan[dest_byte_pos + 1] = static_cast<uint8_t>(G * 255);
+      dest_scan[dest_byte_pos + 2] = static_cast<uint8_t>(R * 255);
+      dest_byte_pos += 3;
+    }
+  }
+}
+
+uint8_t* CPDF_DIBSource::GetBuffer() const {
+  return m_pCachedBitmap ? m_pCachedBitmap->GetBuffer() : nullptr;
+}
+
+const uint8_t* CPDF_DIBSource::GetScanline(int line) const {
+  if (m_bpc == 0) {
+    return nullptr;
+  }
+  FX_SAFE_DWORD src_pitch = CalculatePitch8(m_bpc, m_nComponents, m_Width);
+  if (!src_pitch.IsValid())
+    return nullptr;
+  FX_DWORD src_pitch_value = src_pitch.ValueOrDie();
+  const uint8_t* pSrcLine = nullptr;
+  if (m_pCachedBitmap && src_pitch_value <= m_pCachedBitmap->GetPitch()) {
+    if (line >= m_pCachedBitmap->GetHeight()) {
+      line = m_pCachedBitmap->GetHeight() - 1;
+    }
+    pSrcLine = m_pCachedBitmap->GetScanline(line);
+  } else if (m_pDecoder) {
+    pSrcLine = m_pDecoder->GetScanline(line);
+  } else {
+    if (m_pStreamAcc->GetSize() >= (line + 1) * src_pitch_value) {
+      pSrcLine = m_pStreamAcc->GetData() + line * src_pitch_value;
+    }
+  }
+  if (!pSrcLine) {
+    uint8_t* pLineBuf = m_pMaskedLine ? m_pMaskedLine : m_pLineBuf;
+    FXSYS_memset(pLineBuf, 0xFF, m_Pitch);
+    return pLineBuf;
+  }
+  if (m_bpc * m_nComponents == 1) {
+    if (m_bImageMask && m_bDefaultDecode) {
+      for (FX_DWORD i = 0; i < src_pitch_value; i++) {
+        m_pLineBuf[i] = ~pSrcLine[i];
+      }
+    } else if (m_bColorKey) {
+      FX_DWORD reset_argb, set_argb;
+      reset_argb = m_pPalette ? m_pPalette[0] : 0xFF000000;
+      set_argb = m_pPalette ? m_pPalette[1] : 0xFFFFFFFF;
+      if (m_pCompData[0].m_ColorKeyMin == 0) {
+        reset_argb = 0;
+      }
+      if (m_pCompData[0].m_ColorKeyMax == 1) {
+        set_argb = 0;
+      }
+      set_argb = FXARGB_TODIB(set_argb);
+      reset_argb = FXARGB_TODIB(reset_argb);
+      FX_DWORD* dest_scan = reinterpret_cast<FX_DWORD*>(m_pMaskedLine);
+      for (int col = 0; col < m_Width; col++) {
+        if (pSrcLine[col / 8] & (1 << (7 - col % 8))) {
+          *dest_scan = set_argb;
+        } else {
+          *dest_scan = reset_argb;
+        }
+        dest_scan++;
+      }
+      return m_pMaskedLine;
+    } else {
+      FXSYS_memcpy(m_pLineBuf, pSrcLine, src_pitch_value);
+    }
+    return m_pLineBuf;
+  }
+  if (m_bpc * m_nComponents <= 8) {
+    if (m_bpc == 8) {
+      FXSYS_memcpy(m_pLineBuf, pSrcLine, src_pitch_value);
+    } else {
+      uint64_t src_bit_pos = 0;
+      for (int col = 0; col < m_Width; col++) {
+        unsigned int color_index = 0;
+        for (FX_DWORD color = 0; color < m_nComponents; color++) {
+          unsigned int data = GetBits8(pSrcLine, src_bit_pos, m_bpc);
+          color_index |= data << (color * m_bpc);
+          src_bit_pos += m_bpc;
+        }
+        m_pLineBuf[col] = color_index;
+      }
+    }
+    if (m_bColorKey) {
+      uint8_t* pDestPixel = m_pMaskedLine;
+      const uint8_t* pSrcPixel = m_pLineBuf;
+      for (int col = 0; col < m_Width; col++) {
+        uint8_t index = *pSrcPixel++;
+        if (m_pPalette) {
+          *pDestPixel++ = FXARGB_B(m_pPalette[index]);
+          *pDestPixel++ = FXARGB_G(m_pPalette[index]);
+          *pDestPixel++ = FXARGB_R(m_pPalette[index]);
+        } else {
+          *pDestPixel++ = index;
+          *pDestPixel++ = index;
+          *pDestPixel++ = index;
+        }
+        *pDestPixel = (index < m_pCompData[0].m_ColorKeyMin ||
+                       index > m_pCompData[0].m_ColorKeyMax)
+                          ? 0xFF
+                          : 0;
+        pDestPixel++;
+      }
+      return m_pMaskedLine;
+    }
+    return m_pLineBuf;
+  }
+  if (m_bColorKey) {
+    if (m_nComponents == 3 && m_bpc == 8) {
+      uint8_t* alpha_channel = m_pMaskedLine + 3;
+      for (int col = 0; col < m_Width; col++) {
+        const uint8_t* pPixel = pSrcLine + col * 3;
+        alpha_channel[col * 4] = (pPixel[0] < m_pCompData[0].m_ColorKeyMin ||
+                                  pPixel[0] > m_pCompData[0].m_ColorKeyMax ||
+                                  pPixel[1] < m_pCompData[1].m_ColorKeyMin ||
+                                  pPixel[1] > m_pCompData[1].m_ColorKeyMax ||
+                                  pPixel[2] < m_pCompData[2].m_ColorKeyMin ||
+                                  pPixel[2] > m_pCompData[2].m_ColorKeyMax)
+                                     ? 0xFF
+                                     : 0;
+      }
+    } else {
+      FXSYS_memset(m_pMaskedLine, 0xFF, m_Pitch);
+    }
+  }
+  if (m_pColorSpace) {
+    TranslateScanline24bpp(m_pLineBuf, pSrcLine);
+    pSrcLine = m_pLineBuf;
+  }
+  if (m_bColorKey) {
+    const uint8_t* pSrcPixel = pSrcLine;
+    uint8_t* pDestPixel = m_pMaskedLine;
+    for (int col = 0; col < m_Width; col++) {
+      *pDestPixel++ = *pSrcPixel++;
+      *pDestPixel++ = *pSrcPixel++;
+      *pDestPixel++ = *pSrcPixel++;
+      pDestPixel++;
+    }
+    return m_pMaskedLine;
+  }
+  return pSrcLine;
+}
+
+FX_BOOL CPDF_DIBSource::SkipToScanline(int line, IFX_Pause* pPause) const {
+  return m_pDecoder && m_pDecoder->SkipToScanline(line, pPause);
+}
+
+void CPDF_DIBSource::DownSampleScanline(int line,
+                                        uint8_t* dest_scan,
+                                        int dest_bpp,
+                                        int dest_width,
+                                        FX_BOOL bFlipX,
+                                        int clip_left,
+                                        int clip_width) const {
+  if (line < 0 || !dest_scan || dest_bpp <= 0 || dest_width <= 0 ||
+      clip_left < 0 || clip_width <= 0) {
+    return;
+  }
+
+  FX_DWORD src_width = m_Width;
+  FX_SAFE_DWORD pitch = CalculatePitch8(m_bpc, m_nComponents, m_Width);
+  if (!pitch.IsValid())
+    return;
+
+  const uint8_t* pSrcLine = nullptr;
+  if (m_pCachedBitmap) {
+    pSrcLine = m_pCachedBitmap->GetScanline(line);
+  } else if (m_pDecoder) {
+    pSrcLine = m_pDecoder->GetScanline(line);
+  } else {
+    FX_DWORD src_pitch = pitch.ValueOrDie();
+    pitch *= (line + 1);
+    if (!pitch.IsValid()) {
+      return;
+    }
+
+    if (m_pStreamAcc->GetSize() >= pitch.ValueOrDie()) {
+      pSrcLine = m_pStreamAcc->GetData() + line * src_pitch;
+    }
+  }
+  int orig_Bpp = m_bpc * m_nComponents / 8;
+  int dest_Bpp = dest_bpp / 8;
+  if (!pSrcLine) {
+    FXSYS_memset(dest_scan, 0xFF, dest_Bpp * clip_width);
+    return;
+  }
+
+  FX_SAFE_INT32 max_src_x = clip_left;
+  max_src_x += clip_width - 1;
+  max_src_x *= src_width;
+  max_src_x /= dest_width;
+  if (!max_src_x.IsValid())
+    return;
+
+  if (m_bpc * m_nComponents == 1) {
+    DownSampleScanline1Bit(orig_Bpp, dest_Bpp, src_width, pSrcLine, dest_scan,
+                           dest_width, bFlipX, clip_left, clip_width);
+  } else if (m_bpc * m_nComponents <= 8) {
+    DownSampleScanline8Bit(orig_Bpp, dest_Bpp, src_width, pSrcLine, dest_scan,
+                           dest_width, bFlipX, clip_left, clip_width);
+  } else {
+    DownSampleScanline32Bit(orig_Bpp, dest_Bpp, src_width, pSrcLine, dest_scan,
+                            dest_width, bFlipX, clip_left, clip_width);
+  }
+}
+
+void CPDF_DIBSource::DownSampleScanline1Bit(int orig_Bpp,
+                                            int dest_Bpp,
+                                            FX_DWORD src_width,
+                                            const uint8_t* pSrcLine,
+                                            uint8_t* dest_scan,
+                                            int dest_width,
+                                            FX_BOOL bFlipX,
+                                            int clip_left,
+                                            int clip_width) const {
+  FX_DWORD set_argb = (FX_DWORD)-1;
+  FX_DWORD reset_argb = 0;
+  if (m_bImageMask) {
+    if (m_bDefaultDecode) {
+      set_argb = 0;
+      reset_argb = (FX_DWORD)-1;
+    }
+  } else if (m_bColorKey) {
+    reset_argb = m_pPalette ? m_pPalette[0] : 0xFF000000;
+    set_argb = m_pPalette ? m_pPalette[1] : 0xFFFFFFFF;
+    if (m_pCompData[0].m_ColorKeyMin == 0) {
+      reset_argb = 0;
+    }
+    if (m_pCompData[0].m_ColorKeyMax == 1) {
+      set_argb = 0;
+    }
+    set_argb = FXARGB_TODIB(set_argb);
+    reset_argb = FXARGB_TODIB(reset_argb);
+    FX_DWORD* dest_scan_dword = reinterpret_cast<FX_DWORD*>(dest_scan);
+    for (int i = 0; i < clip_width; i++) {
+      FX_DWORD src_x = (clip_left + i) * src_width / dest_width;
+      if (bFlipX) {
+        src_x = src_width - src_x - 1;
+      }
+      src_x %= src_width;
+      if (pSrcLine[src_x / 8] & (1 << (7 - src_x % 8))) {
+        dest_scan_dword[i] = set_argb;
+      } else {
+        dest_scan_dword[i] = reset_argb;
+      }
+    }
+    return;
+  } else {
+    if (dest_Bpp == 1) {
+    } else if (m_pPalette) {
+      reset_argb = m_pPalette[0];
+      set_argb = m_pPalette[1];
+    }
+  }
+  for (int i = 0; i < clip_width; i++) {
+    FX_DWORD src_x = (clip_left + i) * src_width / dest_width;
+    if (bFlipX) {
+      src_x = src_width - src_x - 1;
+    }
+    src_x %= src_width;
+    int dest_pos = i * dest_Bpp;
+    if (pSrcLine[src_x / 8] & (1 << (7 - src_x % 8))) {
+      if (dest_Bpp == 1) {
+        dest_scan[dest_pos] = static_cast<uint8_t>(set_argb);
+      } else if (dest_Bpp == 3) {
+        dest_scan[dest_pos] = FXARGB_B(set_argb);
+        dest_scan[dest_pos + 1] = FXARGB_G(set_argb);
+        dest_scan[dest_pos + 2] = FXARGB_R(set_argb);
+      } else {
+        *reinterpret_cast<FX_DWORD*>(dest_scan + dest_pos) = set_argb;
+      }
+    } else {
+      if (dest_Bpp == 1) {
+        dest_scan[dest_pos] = static_cast<uint8_t>(reset_argb);
+      } else if (dest_Bpp == 3) {
+        dest_scan[dest_pos] = FXARGB_B(reset_argb);
+        dest_scan[dest_pos + 1] = FXARGB_G(reset_argb);
+        dest_scan[dest_pos + 2] = FXARGB_R(reset_argb);
+      } else {
+        *reinterpret_cast<FX_DWORD*>(dest_scan + dest_pos) = reset_argb;
+      }
+    }
+  }
+}
+
+void CPDF_DIBSource::DownSampleScanline8Bit(int orig_Bpp,
+                                            int dest_Bpp,
+                                            FX_DWORD src_width,
+                                            const uint8_t* pSrcLine,
+                                            uint8_t* dest_scan,
+                                            int dest_width,
+                                            FX_BOOL bFlipX,
+                                            int clip_left,
+                                            int clip_width) const {
+  if (m_bpc < 8) {
+    uint64_t src_bit_pos = 0;
+    for (FX_DWORD col = 0; col < src_width; col++) {
+      unsigned int color_index = 0;
+      for (FX_DWORD color = 0; color < m_nComponents; color++) {
+        unsigned int data = GetBits8(pSrcLine, src_bit_pos, m_bpc);
+        color_index |= data << (color * m_bpc);
+        src_bit_pos += m_bpc;
+      }
+      m_pLineBuf[col] = color_index;
+    }
+    pSrcLine = m_pLineBuf;
+  }
+  if (m_bColorKey) {
+    for (int i = 0; i < clip_width; i++) {
+      FX_DWORD src_x = (clip_left + i) * src_width / dest_width;
+      if (bFlipX) {
+        src_x = src_width - src_x - 1;
+      }
+      src_x %= src_width;
+      uint8_t* pDestPixel = dest_scan + i * 4;
+      uint8_t index = pSrcLine[src_x];
+      if (m_pPalette) {
+        *pDestPixel++ = FXARGB_B(m_pPalette[index]);
+        *pDestPixel++ = FXARGB_G(m_pPalette[index]);
+        *pDestPixel++ = FXARGB_R(m_pPalette[index]);
+      } else {
+        *pDestPixel++ = index;
+        *pDestPixel++ = index;
+        *pDestPixel++ = index;
+      }
+      *pDestPixel = (index < m_pCompData[0].m_ColorKeyMin ||
+                     index > m_pCompData[0].m_ColorKeyMax)
+                        ? 0xFF
+                        : 0;
+    }
+    return;
+  }
+  for (int i = 0; i < clip_width; i++) {
+    FX_DWORD src_x = (clip_left + i) * src_width / dest_width;
+    if (bFlipX) {
+      src_x = src_width - src_x - 1;
+    }
+    src_x %= src_width;
+    uint8_t index = pSrcLine[src_x];
+    if (dest_Bpp == 1) {
+      dest_scan[i] = index;
+    } else {
+      int dest_pos = i * dest_Bpp;
+      FX_ARGB argb = m_pPalette[index];
+      dest_scan[dest_pos] = FXARGB_B(argb);
+      dest_scan[dest_pos + 1] = FXARGB_G(argb);
+      dest_scan[dest_pos + 2] = FXARGB_R(argb);
+    }
+  }
+}
+
+void CPDF_DIBSource::DownSampleScanline32Bit(int orig_Bpp,
+                                             int dest_Bpp,
+                                             FX_DWORD src_width,
+                                             const uint8_t* pSrcLine,
+                                             uint8_t* dest_scan,
+                                             int dest_width,
+                                             FX_BOOL bFlipX,
+                                             int clip_left,
+                                             int clip_width) const {
+  // last_src_x used to store the last seen src_x position which should be
+  // in [0, src_width). Set the initial value to be an invalid src_x value.
+  FX_DWORD last_src_x = src_width;
+  FX_ARGB last_argb = FXARGB_MAKE(0xFF, 0xFF, 0xFF, 0xFF);
+  FX_FLOAT unit_To8Bpc = 255.0f / ((1 << m_bpc) - 1);
+  for (int i = 0; i < clip_width; i++) {
+    int dest_x = clip_left + i;
+    FX_DWORD src_x = (bFlipX ? (dest_width - dest_x - 1) : dest_x) *
+                     (int64_t)src_width / dest_width;
+    src_x %= src_width;
+
+    uint8_t* pDestPixel = dest_scan + i * dest_Bpp;
+    FX_ARGB argb;
+    if (src_x == last_src_x) {
+      argb = last_argb;
+    } else {
+      CFX_FixedBufGrow<uint8_t, 128> extracted_components(m_nComponents);
+      const uint8_t* pSrcPixel = nullptr;
+      if (m_bpc % 8 != 0) {
+        // No need to check for 32-bit overflow, as |src_x| is bounded by
+        // |src_width| and DownSampleScanline() already checked for overflow
+        // with the pitch calculation.
+        size_t num_bits = src_x * m_bpc * m_nComponents;
+        uint64_t src_bit_pos = num_bits % 8;
+        pSrcPixel = pSrcLine + num_bits / 8;
+        for (FX_DWORD j = 0; j < m_nComponents; ++j) {
+          extracted_components[j] = static_cast<uint8_t>(
+              GetBits8(pSrcPixel, src_bit_pos, m_bpc) * unit_To8Bpc);
+          src_bit_pos += m_bpc;
+        }
+        pSrcPixel = extracted_components;
+      } else {
+        pSrcPixel = pSrcLine + src_x * orig_Bpp;
+        if (m_bpc == 16) {
+          for (FX_DWORD j = 0; j < m_nComponents; ++j)
+            extracted_components[j] = pSrcPixel[j * 2];
+          pSrcPixel = extracted_components;
+        }
+      }
+
+      if (m_pColorSpace) {
+        uint8_t color[4];
+        const FX_BOOL bTransMask = TransMask();
+        if (m_bDefaultDecode) {
+          m_pColorSpace->TranslateImageLine(color, pSrcPixel, 1, 0, 0,
+                                            bTransMask);
+        } else {
+          for (FX_DWORD j = 0; j < m_nComponents; ++j) {
+            FX_FLOAT component_value =
+                static_cast<FX_FLOAT>(extracted_components[j]);
+            int color_value = static_cast<int>(
+                (m_pCompData[j].m_DecodeMin +
+                 m_pCompData[j].m_DecodeStep * component_value) *
+                    255.0f +
+                0.5f);
+            extracted_components[j] =
+                color_value > 255 ? 255 : (color_value < 0 ? 0 : color_value);
+          }
+          m_pColorSpace->TranslateImageLine(color, extracted_components, 1, 0,
+                                            0, bTransMask);
+        }
+        argb = FXARGB_MAKE(0xFF, color[2], color[1], color[0]);
+      } else {
+        argb = FXARGB_MAKE(0xFF, pSrcPixel[2], pSrcPixel[1], pSrcPixel[0]);
+      }
+      if (m_bColorKey) {
+        int alpha = 0xFF;
+        if (m_nComponents == 3 && m_bpc == 8) {
+          alpha = (pSrcPixel[0] < m_pCompData[0].m_ColorKeyMin ||
+                   pSrcPixel[0] > m_pCompData[0].m_ColorKeyMax ||
+                   pSrcPixel[1] < m_pCompData[1].m_ColorKeyMin ||
+                   pSrcPixel[1] > m_pCompData[1].m_ColorKeyMax ||
+                   pSrcPixel[2] < m_pCompData[2].m_ColorKeyMin ||
+                   pSrcPixel[2] > m_pCompData[2].m_ColorKeyMax)
+                      ? 0xFF
+                      : 0;
+        }
+        argb &= 0xFFFFFF;
+        argb |= alpha << 24;
+      }
+      last_src_x = src_x;
+      last_argb = argb;
+    }
+    if (dest_Bpp == 4) {
+      *reinterpret_cast<FX_DWORD*>(pDestPixel) = FXARGB_TODIB(argb);
+    } else {
+      *pDestPixel++ = FXARGB_B(argb);
+      *pDestPixel++ = FXARGB_G(argb);
+      *pDestPixel = FXARGB_R(argb);
+    }
+  }
+}
+
+FX_BOOL CPDF_DIBSource::TransMask() const {
+  return m_bLoadMask && m_GroupFamily == PDFCS_DEVICECMYK &&
+         m_Family == PDFCS_DEVICECMYK;
+}
+
+void CPDF_DIBSource::SetDownSampleSize(int dest_width, int dest_height) {
+  if (m_pDecoder) {
+    m_pDecoder->DownScale(dest_width, dest_height);
+    m_Width = m_pDecoder->GetWidth();
+    m_Height = m_pDecoder->GetHeight();
+  }
+}
+
+void CPDF_DIBSource::ClearImageData() {
+  if (m_pDecoder) {
+    m_pDecoder->ClearImageData();
+  }
+}
+
+CPDF_ImageLoaderHandle::CPDF_ImageLoaderHandle() {
+  m_pImageLoader = nullptr;
+  m_pCache = nullptr;
+  m_pImage = nullptr;
+}
+
+CPDF_ImageLoaderHandle::~CPDF_ImageLoaderHandle() {}
+
+FX_BOOL CPDF_ImageLoaderHandle::Start(CPDF_ImageLoader* pImageLoader,
+                                      const CPDF_ImageObject* pImage,
+                                      CPDF_PageRenderCache* pCache,
+                                      FX_BOOL bStdCS,
+                                      FX_DWORD GroupFamily,
+                                      FX_BOOL bLoadMask,
+                                      CPDF_RenderStatus* pRenderStatus,
+                                      int32_t nDownsampleWidth,
+                                      int32_t nDownsampleHeight) {
+  m_pImageLoader = pImageLoader;
+  m_pCache = pCache;
+  m_pImage = const_cast<CPDF_ImageObject*>(pImage);
+  m_nDownsampleWidth = nDownsampleWidth;
+  m_nDownsampleHeight = nDownsampleHeight;
+  FX_BOOL ret;
+  if (pCache) {
+    ret = pCache->StartGetCachedBitmap(pImage->m_pImage->GetStream(), bStdCS,
+                                       GroupFamily, bLoadMask, pRenderStatus,
+                                       m_nDownsampleWidth, m_nDownsampleHeight);
+    if (!ret) {
+      m_pImageLoader->m_bCached = TRUE;
+      m_pImageLoader->m_pBitmap =
+          pCache->GetCurImageCacheEntry()->DetachBitmap();
+      m_pImageLoader->m_pMask = pCache->GetCurImageCacheEntry()->DetachMask();
+      m_pImageLoader->m_MatteColor =
+          pCache->GetCurImageCacheEntry()->m_MatteColor;
+    }
+  } else {
+    ret = pImage->m_pImage->StartLoadDIBSource(pRenderStatus->m_pFormResource,
+                                               pRenderStatus->m_pPageResource,
+                                               bStdCS, GroupFamily, bLoadMask);
+    if (!ret) {
+      m_pImageLoader->m_bCached = FALSE;
+      m_pImageLoader->m_pBitmap = m_pImage->m_pImage->DetachBitmap();
+      m_pImageLoader->m_pMask = m_pImage->m_pImage->DetachMask();
+      m_pImageLoader->m_MatteColor = m_pImage->m_pImage->m_MatteColor;
+    }
+  }
+  return ret;
+}
+
+FX_BOOL CPDF_ImageLoaderHandle::Continue(IFX_Pause* pPause) {
+  FX_BOOL ret;
+  if (m_pCache) {
+    ret = m_pCache->Continue(pPause);
+    if (!ret) {
+      m_pImageLoader->m_bCached = TRUE;
+      m_pImageLoader->m_pBitmap =
+          m_pCache->GetCurImageCacheEntry()->DetachBitmap();
+      m_pImageLoader->m_pMask = m_pCache->GetCurImageCacheEntry()->DetachMask();
+      m_pImageLoader->m_MatteColor =
+          m_pCache->GetCurImageCacheEntry()->m_MatteColor;
+    }
+  } else {
+    ret = m_pImage->m_pImage->Continue(pPause);
+    if (!ret) {
+      m_pImageLoader->m_bCached = FALSE;
+      m_pImageLoader->m_pBitmap = m_pImage->m_pImage->DetachBitmap();
+      m_pImageLoader->m_pMask = m_pImage->m_pImage->DetachMask();
+      m_pImageLoader->m_MatteColor = m_pImage->m_pImage->m_MatteColor;
+    }
+  }
+  return ret;
+}
+
+FX_BOOL CPDF_ImageLoader::Start(const CPDF_ImageObject* pImage,
+                                CPDF_PageRenderCache* pCache,
+                                CPDF_ImageLoaderHandle*& LoadHandle,
+                                FX_BOOL bStdCS,
+                                FX_DWORD GroupFamily,
+                                FX_BOOL bLoadMask,
+                                CPDF_RenderStatus* pRenderStatus,
+                                int32_t nDownsampleWidth,
+                                int32_t nDownsampleHeight) {
+  m_nDownsampleWidth = nDownsampleWidth;
+  m_nDownsampleHeight = nDownsampleHeight;
+  LoadHandle = new CPDF_ImageLoaderHandle;
+  return LoadHandle->Start(this, pImage, pCache, bStdCS, GroupFamily, bLoadMask,
+                           pRenderStatus, m_nDownsampleWidth,
+                           m_nDownsampleHeight);
+}
+
+FX_BOOL CPDF_ImageLoader::Continue(CPDF_ImageLoaderHandle* LoadHandle,
+                                   IFX_Pause* pPause) {
+  return LoadHandle->Continue(pPause);
+}
+
+CPDF_ImageLoader::~CPDF_ImageLoader() {
+  if (!m_bCached) {
+    delete m_pBitmap;
+    delete m_pMask;
+  }
+}
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp b/core/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp
new file mode 100644
index 0000000000..427abb8e37
--- /dev/null
+++ b/core/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp
@@ -0,0 +1,29 @@
+// Copyright 2015 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "testing/embedder_test.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class FPDFRenderLoadImageEmbeddertest : public EmbedderTest {};
+
+TEST_F(FPDFRenderLoadImageEmbeddertest, Bug_554151) {
+  // Test scanline downsampling with a BitsPerComponent of 4.
+  // Should not crash.
+  EXPECT_TRUE(OpenDocument("bug_554151.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  EXPECT_NE(nullptr, page);
+  FPDF_BITMAP bitmap = RenderPage(page);
+  FPDFBitmap_Destroy(bitmap);
+  UnloadPage(page);
+}
+
+TEST_F(FPDFRenderLoadImageEmbeddertest, Bug_557223) {
+  // Should not crash
+  EXPECT_TRUE(OpenDocument("bug_557223.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  EXPECT_NE(nullptr, page);
+  FPDF_BITMAP bitmap = RenderPage(page);
+  FPDFBitmap_Destroy(bitmap);
+  UnloadPage(page);
+}
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_pattern.cpp b/core/fpdfapi/fpdf_render/fpdf_render_pattern.cpp
new file mode 100644
index 0000000000..5ad8db1646
--- /dev/null
+++ b/core/fpdfapi/fpdf_render/fpdf_render_pattern.cpp
@@ -0,0 +1,1207 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfapi/fpdf_render/render_int.h"
+
+#include "core/fpdfapi/fpdf_page/pageint.h"
+#include "core/include/fpdfapi/cpdf_array.h"
+#include "core/include/fpdfapi/cpdf_dictionary.h"
+#include "core/include/fpdfapi/fpdf_pageobj.h"
+#include "core/include/fpdfapi/fpdf_render.h"
+#include "core/include/fxge/fx_ge.h"
+
+#define SHADING_STEPS 256
+static void DrawAxialShading(CFX_DIBitmap* pBitmap,
+                             CFX_Matrix* pObject2Bitmap,
+                             CPDF_Dictionary* pDict,
+                             CPDF_Function** pFuncs,
+                             int nFuncs,
+                             CPDF_ColorSpace* pCS,
+                             int alpha) {
+  ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
+  CPDF_Array* pCoords = pDict->GetArrayBy("Coords");
+  if (!pCoords) {
+    return;
+  }
+  FX_FLOAT start_x = pCoords->GetNumberAt(0);
+  FX_FLOAT start_y = pCoords->GetNumberAt(1);
+  FX_FLOAT end_x = pCoords->GetNumberAt(2);
+  FX_FLOAT end_y = pCoords->GetNumberAt(3);
+  FX_FLOAT t_min = 0, t_max = 1.0f;
+  CPDF_Array* pArray = pDict->GetArrayBy("Domain");
+  if (pArray) {
+    t_min = pArray->GetNumberAt(0);
+    t_max = pArray->GetNumberAt(1);
+  }
+  FX_BOOL bStartExtend = FALSE, bEndExtend = FALSE;
+  pArray = pDict->GetArrayBy("Extend");
+  if (pArray) {
+    bStartExtend = pArray->GetIntegerAt(0);
+    bEndExtend = pArray->GetIntegerAt(1);
+  }
+  int width = pBitmap->GetWidth();
+  int height = pBitmap->GetHeight();
+  FX_FLOAT x_span = end_x - start_x;
+  FX_FLOAT y_span = end_y - start_y;
+  FX_FLOAT axis_len_square = (x_span * x_span) + (y_span * y_span);
+  CFX_Matrix matrix;
+  matrix.SetReverse(*pObject2Bitmap);
+  int total_results = 0;
+  for (int j = 0; j < nFuncs; j++) {
+    if (pFuncs[j]) {
+      total_results += pFuncs[j]->CountOutputs();
+    }
+  }
+  if (pCS->CountComponents() > total_results) {
+    total_results = pCS->CountComponents();
+  }
+  CFX_FixedBufGrow<FX_FLOAT, 16> result_array(total_results);
+  FX_FLOAT* pResults = result_array;
+  FXSYS_memset(pResults, 0, total_results * sizeof(FX_FLOAT));
+  FX_DWORD rgb_array[SHADING_STEPS];
+  for (int i = 0; i < SHADING_STEPS; i++) {
+    FX_FLOAT input = (t_max - t_min) * i / SHADING_STEPS + t_min;
+    int offset = 0;
+    for (int j = 0; j < nFuncs; j++) {
+      if (pFuncs[j]) {
+        int nresults = 0;
+        if (pFuncs[j]->Call(&input, 1, pResults + offset, nresults)) {
+          offset += nresults;
+        }
+      }
+    }
+    FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
+    pCS->GetRGB(pResults, R, G, B);
+    rgb_array[i] =
+        FXARGB_TODIB(FXARGB_MAKE(alpha, FXSYS_round(R * 255),
+                                 FXSYS_round(G * 255), FXSYS_round(B * 255)));
+  }
+  int pitch = pBitmap->GetPitch();
+  for (int row = 0; row < height; row++) {
+    FX_DWORD* dib_buf = (FX_DWORD*)(pBitmap->GetBuffer() + row * pitch);
+    for (int column = 0; column < width; column++) {
+      FX_FLOAT x = (FX_FLOAT)column, y = (FX_FLOAT)row;
+      matrix.Transform(x, y);
+      FX_FLOAT scale = (((x - start_x) * x_span) + ((y - start_y) * y_span)) /
+                       axis_len_square;
+      int index = (int32_t)(scale * (SHADING_STEPS - 1));
+      if (index < 0) {
+        if (!bStartExtend) {
+          continue;
+        }
+        index = 0;
+      } else if (index >= SHADING_STEPS) {
+        if (!bEndExtend) {
+          continue;
+        }
+        index = SHADING_STEPS - 1;
+      }
+      dib_buf[column] = rgb_array[index];
+    }
+  }
+}
+static void DrawRadialShading(CFX_DIBitmap* pBitmap,
+                              CFX_Matrix* pObject2Bitmap,
+                              CPDF_Dictionary* pDict,
+                              CPDF_Function** pFuncs,
+                              int nFuncs,
+                              CPDF_ColorSpace* pCS,
+                              int alpha) {
+  ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
+  CPDF_Array* pCoords = pDict->GetArrayBy("Coords");
+  if (!pCoords) {
+    return;
+  }
+  FX_FLOAT start_x = pCoords->GetNumberAt(0);
+  FX_FLOAT start_y = pCoords->GetNumberAt(1);
+  FX_FLOAT start_r = pCoords->GetNumberAt(2);
+  FX_FLOAT end_x = pCoords->GetNumberAt(3);
+  FX_FLOAT end_y = pCoords->GetNumberAt(4);
+  FX_FLOAT end_r = pCoords->GetNumberAt(5);
+  CFX_Matrix matrix;
+  matrix.SetReverse(*pObject2Bitmap);
+  FX_FLOAT t_min = 0, t_max = 1.0f;
+  CPDF_Array* pArray = pDict->GetArrayBy("Domain");
+  if (pArray) {
+    t_min = pArray->GetNumberAt(0);
+    t_max = pArray->GetNumberAt(1);
+  }
+  FX_BOOL bStartExtend = FALSE, bEndExtend = FALSE;
+  pArray = pDict->GetArrayBy("Extend");
+  if (pArray) {
+    bStartExtend = pArray->GetIntegerAt(0);
+    bEndExtend = pArray->GetIntegerAt(1);
+  }
+  int total_results = 0;
+  for (int j = 0; j < nFuncs; j++) {
+    if (pFuncs[j]) {
+      total_results += pFuncs[j]->CountOutputs();
+    }
+  }
+  if (pCS->CountComponents() > total_results) {
+    total_results = pCS->CountComponents();
+  }
+  CFX_FixedBufGrow<FX_FLOAT, 16> result_array(total_results);
+  FX_FLOAT* pResults = result_array;
+  FXSYS_memset(pResults, 0, total_results * sizeof(FX_FLOAT));
+  FX_DWORD rgb_array[SHADING_STEPS];
+  for (int i = 0; i < SHADING_STEPS; i++) {
+    FX_FLOAT input = (t_max - t_min) * i / SHADING_STEPS + t_min;
+    int offset = 0;
+    for (int j = 0; j < nFuncs; j++) {
+      if (pFuncs[j]) {
+        int nresults;
+        if (pFuncs[j]->Call(&input, 1, pResults + offset, nresults)) {
+          offset += nresults;
+        }
+      }
+    }
+    FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
+    pCS->GetRGB(pResults, R, G, B);
+    rgb_array[i] =
+        FXARGB_TODIB(FXARGB_MAKE(alpha, FXSYS_round(R * 255),
+                                 FXSYS_round(G * 255), FXSYS_round(B * 255)));
+  }
+  FX_FLOAT a = ((start_x - end_x) * (start_x - end_x)) +
+               ((start_y - end_y) * (start_y - end_y)) -
+               ((start_r - end_r) * (start_r - end_r));
+  int width = pBitmap->GetWidth();
+  int height = pBitmap->GetHeight();
+  int pitch = pBitmap->GetPitch();
+  FX_BOOL bDecreasing = FALSE;
+  if (start_r > end_r) {
+    int length = (int)FXSYS_sqrt((((start_x - end_x) * (start_x - end_x)) +
+                                  ((start_y - end_y) * (start_y - end_y))));
+    if (length < start_r - end_r) {
+      bDecreasing = TRUE;
+    }
+  }
+  for (int row = 0; row < height; row++) {
+    FX_DWORD* dib_buf = (FX_DWORD*)(pBitmap->GetBuffer() + row * pitch);
+    for (int column = 0; column < width; column++) {
+      FX_FLOAT x = (FX_FLOAT)column, y = (FX_FLOAT)row;
+      matrix.Transform(x, y);
+      FX_FLOAT b = -2 * (((x - start_x) * (end_x - start_x)) +
+                         ((y - start_y) * (end_y - start_y)) +
+                         (start_r * (end_r - start_r)));
+      FX_FLOAT c = ((x - start_x) * (x - start_x)) +
+                   ((y - start_y) * (y - start_y)) - (start_r * start_r);
+      FX_FLOAT s;
+      if (a == 0) {
+        s = -c / b;
+      } else {
+        FX_FLOAT b2_4ac = (b * b) - 4 * (a * c);
+        if (b2_4ac < 0) {
+          continue;
+        }
+        FX_FLOAT root = FXSYS_sqrt(b2_4ac);
+        FX_FLOAT s1, s2;
+        if (a > 0) {
+          s1 = (-b - root) / (2 * a);
+          s2 = (-b + root) / (2 * a);
+        } else {
+          s2 = (-b - root) / (2 * a);
+          s1 = (-b + root) / (2 * a);
+        }
+        if (bDecreasing) {
+          if (s1 >= 0 || bStartExtend) {
+            s = s1;
+          } else {
+            s = s2;
+          }
+        } else {
+          if (s2 <= 1.0f || bEndExtend) {
+            s = s2;
+          } else {
+            s = s1;
+          }
+        }
+        if ((start_r + s * (end_r - start_r)) < 0) {
+          continue;
+        }
+      }
+      int index = (int32_t)(s * (SHADING_STEPS - 1));
+      if (index < 0) {
+        if (!bStartExtend) {
+          continue;
+        }
+        index = 0;
+      }
+      if (index >= SHADING_STEPS) {
+        if (!bEndExtend) {
+          continue;
+        }
+        index = SHADING_STEPS - 1;
+      }
+      dib_buf[column] = rgb_array[index];
+    }
+  }
+}
+static void DrawFuncShading(CFX_DIBitmap* pBitmap,
+                            CFX_Matrix* pObject2Bitmap,
+                            CPDF_Dictionary* pDict,
+                            CPDF_Function** pFuncs,
+                            int nFuncs,
+                            CPDF_ColorSpace* pCS,
+                            int alpha) {
+  ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
+  CPDF_Array* pDomain = pDict->GetArrayBy("Domain");
+  FX_FLOAT xmin = 0, ymin = 0, xmax = 1.0f, ymax = 1.0f;
+  if (pDomain) {
+    xmin = pDomain->GetNumberAt(0);
+    xmax = pDomain->GetNumberAt(1);
+    ymin = pDomain->GetNumberAt(2);
+    ymax = pDomain->GetNumberAt(3);
+  }
+  CFX_Matrix mtDomain2Target = pDict->GetMatrixBy("Matrix");
+  CFX_Matrix matrix, reverse_matrix;
+  matrix.SetReverse(*pObject2Bitmap);
+  reverse_matrix.SetReverse(mtDomain2Target);
+  matrix.Concat(reverse_matrix);
+  int width = pBitmap->GetWidth();
+  int height = pBitmap->GetHeight();
+  int pitch = pBitmap->GetPitch();
+  int total_results = 0;
+  for (int j = 0; j < nFuncs; j++) {
+    if (pFuncs[j]) {
+      total_results += pFuncs[j]->CountOutputs();
+    }
+  }
+  if (pCS->CountComponents() > total_results) {
+    total_results = pCS->CountComponents();
+  }
+  CFX_FixedBufGrow<FX_FLOAT, 16> result_array(total_results);
+  FX_FLOAT* pResults = result_array;
+  FXSYS_memset(pResults, 0, total_results * sizeof(FX_FLOAT));
+  for (int row = 0; row < height; row++) {
+    FX_DWORD* dib_buf = (FX_DWORD*)(pBitmap->GetBuffer() + row * pitch);
+    for (int column = 0; column < width; column++) {
+      FX_FLOAT x = (FX_FLOAT)column, y = (FX_FLOAT)row;
+      matrix.Transform(x, y);
+      if (x < xmin || x > xmax || y < ymin || y > ymax) {
+        continue;
+      }
+      FX_FLOAT input[2];
+      int offset = 0;
+      input[0] = x;
+      input[1] = y;
+      for (int j = 0; j < nFuncs; j++) {
+        if (pFuncs[j]) {
+          int nresults;
+          if (pFuncs[j]->Call(input, 2, pResults + offset, nresults)) {
+            offset += nresults;
+          }
+        }
+      }
+      FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
+      pCS->GetRGB(pResults, R, G, B);
+      dib_buf[column] = FXARGB_TODIB(FXARGB_MAKE(
+          alpha, (int32_t)(R * 255), (int32_t)(G * 255), (int32_t)(B * 255)));
+    }
+  }
+}
+FX_BOOL _GetScanlineIntersect(int y,
+                              FX_FLOAT x1,
+                              FX_FLOAT y1,
+                              FX_FLOAT x2,
+                              FX_FLOAT y2,
+                              FX_FLOAT& x) {
+  if (y1 == y2) {
+    return FALSE;
+  }
+  if (y1 < y2) {
+    if (y < y1 || y > y2) {
+      return FALSE;
+    }
+  } else {
+    if (y < y2 || y > y1) {
+      return FALSE;
+    }
+  }
+  x = x1 + ((x2 - x1) * (y - y1) / (y2 - y1));
+  return TRUE;
+}
+static void DrawGouraud(CFX_DIBitmap* pBitmap,
+                        int alpha,
+                        CPDF_MeshVertex triangle[3]) {
+  FX_FLOAT min_y = triangle[0].y, max_y = triangle[0].y;
+  for (int i = 1; i < 3; i++) {
+    if (min_y > triangle[i].y) {
+      min_y = triangle[i].y;
+    }
+    if (max_y < triangle[i].y) {
+      max_y = triangle[i].y;
+    }
+  }
+  if (min_y == max_y) {
+    return;
+  }
+  int min_yi = (int)FXSYS_floor(min_y), max_yi = (int)FXSYS_ceil(max_y);
+  if (min_yi < 0) {
+    min_yi = 0;
+  }
+  if (max_yi >= pBitmap->GetHeight()) {
+    max_yi = pBitmap->GetHeight() - 1;
+  }
+  for (int y = min_yi; y <= max_yi; y++) {
+    int nIntersects = 0;
+    FX_FLOAT inter_x[3], r[3], g[3], b[3];
+    for (int i = 0; i < 3; i++) {
+      CPDF_MeshVertex& vertex1 = triangle[i];
+      CPDF_MeshVertex& vertex2 = triangle[(i + 1) % 3];
+      FX_BOOL bIntersect = _GetScanlineIntersect(
+          y, vertex1.x, vertex1.y, vertex2.x, vertex2.y, inter_x[nIntersects]);
+      if (!bIntersect) {
+        continue;
+      }
+
+      FX_FLOAT y_dist = (y - vertex1.y) / (vertex2.y - vertex1.y);
+      r[nIntersects] = vertex1.r + ((vertex2.r - vertex1.r) * y_dist);
+      g[nIntersects] = vertex1.g + ((vertex2.g - vertex1.g) * y_dist);
+      b[nIntersects] = vertex1.b + ((vertex2.b - vertex1.b) * y_dist);
+      nIntersects++;
+    }
+    if (nIntersects != 2) {
+      continue;
+    }
+    int min_x, max_x, start_index, end_index;
+    if (inter_x[0] < inter_x[1]) {
+      min_x = (int)FXSYS_floor(inter_x[0]);
+      max_x = (int)FXSYS_ceil(inter_x[1]);
+      start_index = 0;
+      end_index = 1;
+    } else {
+      min_x = (int)FXSYS_floor(inter_x[1]);
+      max_x = (int)FXSYS_ceil(inter_x[0]);
+      start_index = 1;
+      end_index = 0;
+    }
+    int start_x = min_x, end_x = max_x;
+    if (start_x < 0) {
+      start_x = 0;
+    }
+    if (end_x > pBitmap->GetWidth()) {
+      end_x = pBitmap->GetWidth();
+    }
+    uint8_t* dib_buf =
+        pBitmap->GetBuffer() + y * pBitmap->GetPitch() + start_x * 4;
+    FX_FLOAT r_unit = (r[end_index] - r[start_index]) / (max_x - min_x);
+    FX_FLOAT g_unit = (g[end_index] - g[start_index]) / (max_x - min_x);
+    FX_FLOAT b_unit = (b[end_index] - b[start_index]) / (max_x - min_x);
+    FX_FLOAT R = r[start_index] + (start_x - min_x) * r_unit;
+    FX_FLOAT G = g[start_index] + (start_x - min_x) * g_unit;
+    FX_FLOAT B = b[start_index] + (start_x - min_x) * b_unit;
+    for (int x = start_x; x < end_x; x++) {
+      R += r_unit;
+      G += g_unit;
+      B += b_unit;
+      FXARGB_SETDIB(dib_buf,
+                    FXARGB_MAKE(alpha, (int32_t)(R * 255), (int32_t)(G * 255),
+                                (int32_t)(B * 255)));
+      dib_buf += 4;
+    }
+  }
+}
+static void DrawFreeGouraudShading(CFX_DIBitmap* pBitmap,
+                                   CFX_Matrix* pObject2Bitmap,
+                                   CPDF_Stream* pShadingStream,
+                                   CPDF_Function** pFuncs,
+                                   int nFuncs,
+                                   CPDF_ColorSpace* pCS,
+                                   int alpha) {
+  ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
+
+  CPDF_MeshStream stream;
+  if (!stream.Load(pShadingStream, pFuncs, nFuncs, pCS))
+    return;
+
+  CPDF_MeshVertex triangle[3];
+  FXSYS_memset(triangle, 0, sizeof(triangle));
+
+  while (!stream.m_BitStream.IsEOF()) {
+    CPDF_MeshVertex vertex;
+    FX_DWORD flag = stream.GetVertex(vertex, pObject2Bitmap);
+    if (flag == 0) {
+      triangle[0] = vertex;
+      for (int j = 1; j < 3; j++) {
+        stream.GetVertex(triangle[j], pObject2Bitmap);
+      }
+    } else {
+      if (flag == 1) {
+        triangle[0] = triangle[1];
+      }
+      triangle[1] = triangle[2];
+      triangle[2] = vertex;
+    }
+    DrawGouraud(pBitmap, alpha, triangle);
+  }
+}
+static void DrawLatticeGouraudShading(CFX_DIBitmap* pBitmap,
+                                      CFX_Matrix* pObject2Bitmap,
+                                      CPDF_Stream* pShadingStream,
+                                      CPDF_Function** pFuncs,
+                                      int nFuncs,
+                                      CPDF_ColorSpace* pCS,
+                                      int alpha) {
+  ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
+
+  int row_verts = pShadingStream->GetDict()->GetIntegerBy("VerticesPerRow");
+  if (row_verts < 2)
+    return;
+
+  CPDF_MeshStream stream;
+  if (!stream.Load(pShadingStream, pFuncs, nFuncs, pCS))
+    return;
+
+  CPDF_MeshVertex* vertex = FX_Alloc2D(CPDF_MeshVertex, row_verts, 2);
+  if (!stream.GetVertexRow(vertex, row_verts, pObject2Bitmap)) {
+    FX_Free(vertex);
+    return;
+  }
+  int last_index = 0;
+  while (1) {
+    CPDF_MeshVertex* last_row = vertex + last_index * row_verts;
+    CPDF_MeshVertex* this_row = vertex + (1 - last_index) * row_verts;
+    if (!stream.GetVertexRow(this_row, row_verts, pObject2Bitmap)) {
+      FX_Free(vertex);
+      return;
+    }
+    CPDF_MeshVertex triangle[3];
+    for (int i = 1; i < row_verts; i++) {
+      triangle[0] = last_row[i];
+      triangle[1] = this_row[i - 1];
+      triangle[2] = last_row[i - 1];
+      DrawGouraud(pBitmap, alpha, triangle);
+      triangle[2] = this_row[i];
+      DrawGouraud(pBitmap, alpha, triangle);
+    }
+    last_index = 1 - last_index;
+  }
+  FX_Free(vertex);
+}
+struct Coon_BezierCoeff {
+  float a, b, c, d;
+  void FromPoints(float p0, float p1, float p2, float p3) {
+    a = -p0 + 3 * p1 - 3 * p2 + p3;
+    b = 3 * p0 - 6 * p1 + 3 * p2;
+    c = -3 * p0 + 3 * p1;
+    d = p0;
+  }
+  Coon_BezierCoeff first_half() {
+    Coon_BezierCoeff result;
+    result.a = a / 8;
+    result.b = b / 4;
+    result.c = c / 2;
+    result.d = d;
+    return result;
+  }
+  Coon_BezierCoeff second_half() {
+    Coon_BezierCoeff result;
+    result.a = a / 8;
+    result.b = 3 * a / 8 + b / 4;
+    result.c = 3 * a / 8 + b / 2 + c / 2;
+    result.d = a / 8 + b / 4 + c / 2 + d;
+    return result;
+  }
+  void GetPoints(float p[4]) {
+    p[0] = d;
+    p[1] = c / 3 + p[0];
+    p[2] = b / 3 - p[0] + 2 * p[1];
+    p[3] = a + p[0] - 3 * p[1] + 3 * p[2];
+  }
+  void GetPointsReverse(float p[4]) {
+    p[3] = d;
+    p[2] = c / 3 + p[3];
+    p[1] = b / 3 - p[3] + 2 * p[2];
+    p[0] = a + p[3] - 3 * p[2] + 3 * p[1];
+  }
+  void BezierInterpol(Coon_BezierCoeff& C1,
+                      Coon_BezierCoeff& C2,
+                      Coon_BezierCoeff& D1,
+                      Coon_BezierCoeff& D2) {
+    a = (D1.a + D2.a) / 2;
+    b = (D1.b + D2.b) / 2;
+    c = (D1.c + D2.c) / 2 - (C1.a / 8 + C1.b / 4 + C1.c / 2) +
+        (C2.a / 8 + C2.b / 4) + (-C1.d + D2.d) / 2 - (C2.a + C2.b) / 2;
+    d = C1.a / 8 + C1.b / 4 + C1.c / 2 + C1.d;
+  }
+  float Distance() {
+    float dis = a + b + c;
+    return dis < 0 ? -dis : dis;
+  }
+};
+struct Coon_Bezier {
+  Coon_BezierCoeff x, y;
+  void FromPoints(float x0,
+                  float y0,
+                  float x1,
+                  float y1,
+                  float x2,
+                  float y2,
+                  float x3,
+                  float y3) {
+    x.FromPoints(x0, x1, x2, x3);
+    y.FromPoints(y0, y1, y2, y3);
+  }
+  Coon_Bezier first_half() {
+    Coon_Bezier result;
+    result.x = x.first_half();
+    result.y = y.first_half();
+    return result;
+  }
+  Coon_Bezier second_half() {
+    Coon_Bezier result;
+    result.x = x.second_half();
+    result.y = y.second_half();
+    return result;
+  }
+  void BezierInterpol(Coon_Bezier& C1,
+                      Coon_Bezier& C2,
+                      Coon_Bezier& D1,
+                      Coon_Bezier& D2) {
+    x.BezierInterpol(C1.x, C2.x, D1.x, D2.x);
+    y.BezierInterpol(C1.y, C2.y, D1.y, D2.y);
+  }
+  void GetPoints(FX_PATHPOINT* pPoints) {
+    float p[4];
+    int i;
+    x.GetPoints(p);
+    for (i = 0; i < 4; i++) {
+      pPoints[i].m_PointX = p[i];
+    }
+    y.GetPoints(p);
+    for (i = 0; i < 4; i++) {
+      pPoints[i].m_PointY = p[i];
+    }
+  }
+  void GetPointsReverse(FX_PATHPOINT* pPoints) {
+    float p[4];
+    int i;
+    x.GetPointsReverse(p);
+    for (i = 0; i < 4; i++) {
+      pPoints[i].m_PointX = p[i];
+    }
+    y.GetPointsReverse(p);
+    for (i = 0; i < 4; i++) {
+      pPoints[i].m_PointY = p[i];
+    }
+  }
+  float Distance() { return x.Distance() + y.Distance(); }
+};
+static int _BiInterpol(int c0,
+                       int c1,
+                       int c2,
+                       int c3,
+                       int x,
+                       int y,
+                       int x_scale,
+                       int y_scale) {
+  int x1 = c0 + (c3 - c0) * x / x_scale;
+  int x2 = c1 + (c2 - c1) * x / x_scale;
+  return x1 + (x2 - x1) * y / y_scale;
+}
+struct Coon_Color {
+  Coon_Color() { FXSYS_memset(comp, 0, sizeof(int) * 3); }
+  int comp[3];
+  void BiInterpol(Coon_Color colors[4],
+                  int x,
+                  int y,
+                  int x_scale,
+                  int y_scale) {
+    for (int i = 0; i < 3; i++)
+      comp[i] =
+          _BiInterpol(colors[0].comp[i], colors[1].comp[i], colors[2].comp[i],
+                      colors[3].comp[i], x, y, x_scale, y_scale);
+  }
+  int Distance(Coon_Color& o) {
+    int max, diff;
+    max = FXSYS_abs(comp[0] - o.comp[0]);
+    diff = FXSYS_abs(comp[1] - o.comp[1]);
+    if (max < diff) {
+      max = diff;
+    }
+    diff = FXSYS_abs(comp[2] - o.comp[2]);
+    if (max < diff) {
+      max = diff;
+    }
+    return max;
+  }
+};
+struct CPDF_PatchDrawer {
+  Coon_Color patch_colors[4];
+  int max_delta;
+  CFX_PathData path;
+  CFX_RenderDevice* pDevice;
+  int fill_mode;
+  int alpha;
+  void Draw(int x_scale,
+            int y_scale,
+            int left,
+            int bottom,
+            Coon_Bezier C1,
+            Coon_Bezier C2,
+            Coon_Bezier D1,
+            Coon_Bezier D2) {
+    FX_BOOL bSmall = C1.Distance() < 2 && C2.Distance() < 2 &&
+                     D1.Distance() < 2 && D2.Distance() < 2;
+    Coon_Color div_colors[4];
+    int d_bottom, d_left, d_top, d_right;
+    div_colors[0].BiInterpol(patch_colors, left, bottom, x_scale, y_scale);
+    if (!bSmall) {
+      div_colors[1].BiInterpol(patch_colors, left, bottom + 1, x_scale,
+                               y_scale);
+      div_colors[2].BiInterpol(patch_colors, left + 1, bottom + 1, x_scale,
+                               y_scale);
+      div_colors[3].BiInterpol(patch_colors, left + 1, bottom, x_scale,
+                               y_scale);
+      d_bottom = div_colors[3].Distance(div_colors[0]);
+      d_left = div_colors[1].Distance(div_colors[0]);
+      d_top = div_colors[1].Distance(div_colors[2]);
+      d_right = div_colors[2].Distance(div_colors[3]);
+    }
+#define COONCOLOR_THRESHOLD 4
+    if (bSmall ||
+        (d_bottom < COONCOLOR_THRESHOLD && d_left < COONCOLOR_THRESHOLD &&
+         d_top < COONCOLOR_THRESHOLD && d_right < COONCOLOR_THRESHOLD)) {
+      FX_PATHPOINT* pPoints = path.GetPoints();
+      C1.GetPoints(pPoints);
+      D2.GetPoints(pPoints + 3);
+      C2.GetPointsReverse(pPoints + 6);
+      D1.GetPointsReverse(pPoints + 9);
+      int fillFlags = FXFILL_WINDING | FXFILL_FULLCOVER;
+      if (fill_mode & RENDER_NOPATHSMOOTH) {
+        fillFlags |= FXFILL_NOPATHSMOOTH;
+      }
+      pDevice->DrawPath(
+          &path, NULL, NULL,
+          FXARGB_MAKE(alpha, div_colors[0].comp[0], div_colors[0].comp[1],
+                      div_colors[0].comp[2]),
+          0, fillFlags);
+    } else {
+      if (d_bottom < COONCOLOR_THRESHOLD && d_top < COONCOLOR_THRESHOLD) {
+        Coon_Bezier m1;
+        m1.BezierInterpol(D1, D2, C1, C2);
+        y_scale *= 2;
+        bottom *= 2;
+        Draw(x_scale, y_scale, left, bottom, C1, m1, D1.first_half(),
+             D2.first_half());
+        Draw(x_scale, y_scale, left, bottom + 1, m1, C2, D1.second_half(),
+             D2.second_half());
+      } else if (d_left < COONCOLOR_THRESHOLD &&
+                 d_right < COONCOLOR_THRESHOLD) {
+        Coon_Bezier m2;
+        m2.BezierInterpol(C1, C2, D1, D2);
+        x_scale *= 2;
+        left *= 2;
+        Draw(x_scale, y_scale, left, bottom, C1.first_half(), C2.first_half(),
+             D1, m2);
+        Draw(x_scale, y_scale, left + 1, bottom, C1.second_half(),
+             C2.second_half(), m2, D2);
+      } else {
+        Coon_Bezier m1, m2;
+        m1.BezierInterpol(D1, D2, C1, C2);
+        m2.BezierInterpol(C1, C2, D1, D2);
+        Coon_Bezier m1f = m1.first_half();
+        Coon_Bezier m1s = m1.second_half();
+        Coon_Bezier m2f = m2.first_half();
+        Coon_Bezier m2s = m2.second_half();
+        x_scale *= 2;
+        y_scale *= 2;
+        left *= 2;
+        bottom *= 2;
+        Draw(x_scale, y_scale, left, bottom, C1.first_half(), m1f,
+             D1.first_half(), m2f);
+        Draw(x_scale, y_scale, left, bottom + 1, m1f, C2.first_half(),
+             D1.second_half(), m2s);
+        Draw(x_scale, y_scale, left + 1, bottom, C1.second_half(), m1s, m2f,
+             D2.first_half());
+        Draw(x_scale, y_scale, left + 1, bottom + 1, m1s, C2.second_half(), m2s,
+             D2.second_half());
+      }
+    }
+  }
+};
+
+bool _CheckCoonTensorPara(const CPDF_MeshStream& stream) {
+  bool bCoorBits = (stream.m_nCoordBits == 1 || stream.m_nCoordBits == 2 ||
+                    stream.m_nCoordBits == 4 || stream.m_nCoordBits == 8 ||
+                    stream.m_nCoordBits == 12 || stream.m_nCoordBits == 16 ||
+                    stream.m_nCoordBits == 24 || stream.m_nCoordBits == 32);
+
+  bool bCompBits = (stream.m_nCompBits == 1 || stream.m_nCompBits == 2 ||
+                    stream.m_nCompBits == 4 || stream.m_nCompBits == 8 ||
+                    stream.m_nCompBits == 12 || stream.m_nCompBits == 16);
+
+  bool bFlagBits = (stream.m_nFlagBits == 2 || stream.m_nFlagBits == 4 ||
+                    stream.m_nFlagBits == 8);
+
+  return bCoorBits && bCompBits && bFlagBits;
+}
+
+static void DrawCoonPatchMeshes(FX_BOOL bTensor,
+                                CFX_DIBitmap* pBitmap,
+                                CFX_Matrix* pObject2Bitmap,
+                                CPDF_Stream* pShadingStream,
+                                CPDF_Function** pFuncs,
+                                int nFuncs,
+                                CPDF_ColorSpace* pCS,
+                                int fill_mode,
+                                int alpha) {
+  ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
+
+  CFX_FxgeDevice device;
+  device.Attach(pBitmap);
+  CPDF_MeshStream stream;
+  if (!stream.Load(pShadingStream, pFuncs, nFuncs, pCS))
+    return;
+  if (!_CheckCoonTensorPara(stream))
+    return;
+
+  CPDF_PatchDrawer patch;
+  patch.alpha = alpha;
+  patch.pDevice = &device;
+  patch.fill_mode = fill_mode;
+  patch.path.SetPointCount(13);
+  FX_PATHPOINT* pPoints = patch.path.GetPoints();
+  pPoints[0].m_Flag = FXPT_MOVETO;
+  for (int i = 1; i < 13; i++) {
+    pPoints[i].m_Flag = FXPT_BEZIERTO;
+  }
+  CFX_PointF coords[16];
+  int point_count = bTensor ? 16 : 12;
+  while (!stream.m_BitStream.IsEOF()) {
+    FX_DWORD flag = stream.GetFlag();
+    int iStartPoint = 0, iStartColor = 0, i = 0;
+    if (flag) {
+      iStartPoint = 4;
+      iStartColor = 2;
+      CFX_PointF tempCoords[4];
+      for (i = 0; i < 4; i++) {
+        tempCoords[i] = coords[(flag * 3 + i) % 12];
+      }
+      FXSYS_memcpy(coords, tempCoords, sizeof(tempCoords));
+      Coon_Color tempColors[2];
+      tempColors[0] = patch.patch_colors[flag];
+      tempColors[1] = patch.patch_colors[(flag + 1) % 4];
+      FXSYS_memcpy(patch.patch_colors, tempColors, sizeof(Coon_Color) * 2);
+    }
+    for (i = iStartPoint; i < point_count; i++) {
+      stream.GetCoords(coords[i].x, coords[i].y);
+      pObject2Bitmap->Transform(coords[i].x, coords[i].y);
+    }
+    for (i = iStartColor; i < 4; i++) {
+      FX_FLOAT r = 0.0f, g = 0.0f, b = 0.0f;
+      stream.GetColor(r, g, b);
+      patch.patch_colors[i].comp[0] = (int32_t)(r * 255);
+      patch.patch_colors[i].comp[1] = (int32_t)(g * 255);
+      patch.patch_colors[i].comp[2] = (int32_t)(b * 255);
+    }
+    CFX_FloatRect bbox = CFX_FloatRect::GetBBox(coords, point_count);
+    if (bbox.right <= 0 || bbox.left >= (FX_FLOAT)pBitmap->GetWidth() ||
+        bbox.top <= 0 || bbox.bottom >= (FX_FLOAT)pBitmap->GetHeight()) {
+      continue;
+    }
+    Coon_Bezier C1, C2, D1, D2;
+    C1.FromPoints(coords[0].x, coords[0].y, coords[11].x, coords[11].y,
+                  coords[10].x, coords[10].y, coords[9].x, coords[9].y);
+    C2.FromPoints(coords[3].x, coords[3].y, coords[4].x, coords[4].y,
+                  coords[5].x, coords[5].y, coords[6].x, coords[6].y);
+    D1.FromPoints(coords[0].x, coords[0].y, coords[1].x, coords[1].y,
+                  coords[2].x, coords[2].y, coords[3].x, coords[3].y);
+    D2.FromPoints(coords[9].x, coords[9].y, coords[8].x, coords[8].y,
+                  coords[7].x, coords[7].y, coords[6].x, coords[6].y);
+    patch.Draw(1, 1, 0, 0, C1, C2, D1, D2);
+  }
+}
+void CPDF_RenderStatus::DrawShading(CPDF_ShadingPattern* pPattern,
+                                    CFX_Matrix* pMatrix,
+                                    FX_RECT& clip_rect,
+                                    int alpha,
+                                    FX_BOOL bAlphaMode) {
+  CPDF_Function** pFuncs = pPattern->m_pFunctions;
+  int nFuncs = pPattern->m_nFuncs;
+  CPDF_Dictionary* pDict = pPattern->m_pShadingObj->GetDict();
+  CPDF_ColorSpace* pColorSpace = pPattern->m_pCS;
+  if (!pColorSpace) {
+    return;
+  }
+  FX_ARGB background = 0;
+  if (!pPattern->m_bShadingObj &&
+      pPattern->m_pShadingObj->GetDict()->KeyExist("Background")) {
+    CPDF_Array* pBackColor =
+        pPattern->m_pShadingObj->GetDict()->GetArrayBy("Background");
+    if (pBackColor &&
+        pBackColor->GetCount() >= pColorSpace->CountComponents()) {
+      CFX_FixedBufGrow<FX_FLOAT, 16> comps(pColorSpace->CountComponents());
+      for (int i = 0; i < pColorSpace->CountComponents(); i++) {
+        comps[i] = pBackColor->GetNumberAt(i);
+      }
+      FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
+      pColorSpace->GetRGB(comps, R, G, B);
+      background = ArgbEncode(255, (int32_t)(R * 255), (int32_t)(G * 255),
+                              (int32_t)(B * 255));
+    }
+  }
+  if (pDict->KeyExist("BBox")) {
+    CFX_FloatRect rect = pDict->GetRectBy("BBox");
+    rect.Transform(pMatrix);
+    clip_rect.Intersect(rect.GetOutterRect());
+  }
+  CPDF_DeviceBuffer buffer;
+  buffer.Initialize(m_pContext, m_pDevice, &clip_rect, m_pCurObj, 150);
+  CFX_Matrix FinalMatrix = *pMatrix;
+  FinalMatrix.Concat(*buffer.GetMatrix());
+  CFX_DIBitmap* pBitmap = buffer.GetBitmap();
+  if (!pBitmap->GetBuffer()) {
+    return;
+  }
+  pBitmap->Clear(background);
+  int fill_mode = m_Options.m_Flags;
+  switch (pPattern->m_ShadingType) {
+    case kInvalidShading:
+    case kMaxShading:
+      return;
+    case kFunctionBasedShading:
+      DrawFuncShading(pBitmap, &FinalMatrix, pDict, pFuncs, nFuncs, pColorSpace,
+                      alpha);
+      break;
+    case kAxialShading:
+      DrawAxialShading(pBitmap, &FinalMatrix, pDict, pFuncs, nFuncs,
+                       pColorSpace, alpha);
+      break;
+    case kRadialShading:
+      DrawRadialShading(pBitmap, &FinalMatrix, pDict, pFuncs, nFuncs,
+                        pColorSpace, alpha);
+      break;
+    case kFreeFormGouraudTriangleMeshShading: {
+      DrawFreeGouraudShading(pBitmap, &FinalMatrix,
+                             ToStream(pPattern->m_pShadingObj), pFuncs, nFuncs,
+                             pColorSpace, alpha);
+    } break;
+    case kLatticeFormGouraudTriangleMeshShading: {
+      DrawLatticeGouraudShading(pBitmap, &FinalMatrix,
+                                ToStream(pPattern->m_pShadingObj), pFuncs,
+                                nFuncs, pColorSpace, alpha);
+    } break;
+    case kCoonsPatchMeshShading:
+    case kTensorProductPatchMeshShading: {
+      DrawCoonPatchMeshes(
+          pPattern->m_ShadingType == kTensorProductPatchMeshShading, pBitmap,
+          &FinalMatrix, ToStream(pPattern->m_pShadingObj), pFuncs, nFuncs,
+          pColorSpace, fill_mode, alpha);
+    } break;
+  }
+  if (bAlphaMode) {
+    pBitmap->LoadChannel(FXDIB_Red, pBitmap, FXDIB_Alpha);
+  }
+  if (m_Options.m_ColorMode == RENDER_COLOR_GRAY) {
+    pBitmap->ConvertColorScale(m_Options.m_ForeColor, m_Options.m_BackColor);
+  }
+  buffer.OutputToDevice();
+}
+void CPDF_RenderStatus::DrawShadingPattern(CPDF_ShadingPattern* pattern,
+                                           const CPDF_PageObject* pPageObj,
+                                           const CFX_Matrix* pObj2Device,
+                                           FX_BOOL bStroke) {
+  if (!pattern->Load()) {
+    return;
+  }
+  m_pDevice->SaveState();
+  if (pPageObj->IsPath()) {
+    if (!SelectClipPath(pPageObj->AsPath(), pObj2Device, bStroke)) {
+      m_pDevice->RestoreState();
+      return;
+    }
+  } else if (pPageObj->IsImage()) {
+    m_pDevice->SetClip_Rect(pPageObj->GetBBox(pObj2Device));
+  } else {
+    return;
+  }
+  FX_RECT rect;
+  if (GetObjectClippedRect(pPageObj, pObj2Device, FALSE, rect)) {
+    m_pDevice->RestoreState();
+    return;
+  }
+  CFX_Matrix matrix = pattern->m_Pattern2Form;
+  matrix.Concat(*pObj2Device);
+  GetScaledMatrix(matrix);
+  int alpha = pPageObj->m_GeneralState.GetAlpha(bStroke);
+  DrawShading(pattern, &matrix, rect, alpha,
+              m_Options.m_ColorMode == RENDER_COLOR_ALPHA);
+  m_pDevice->RestoreState();
+}
+FX_BOOL CPDF_RenderStatus::ProcessShading(const CPDF_ShadingObject* pShadingObj,
+                                          const CFX_Matrix* pObj2Device) {
+  FX_RECT rect = pShadingObj->GetBBox(pObj2Device);
+  FX_RECT clip_box = m_pDevice->GetClipBox();
+  rect.Intersect(clip_box);
+  if (rect.IsEmpty()) {
+    return TRUE;
+  }
+  CFX_Matrix matrix = pShadingObj->m_Matrix;
+  matrix.Concat(*pObj2Device);
+  DrawShading(pShadingObj->m_pShading, &matrix, rect,
+              pShadingObj->m_GeneralState.GetAlpha(FALSE),
+              m_Options.m_ColorMode == RENDER_COLOR_ALPHA);
+  return TRUE;
+}
+static CFX_DIBitmap* DrawPatternBitmap(CPDF_Document* pDoc,
+                                       CPDF_PageRenderCache* pCache,
+                                       CPDF_TilingPattern* pPattern,
+                                       const CFX_Matrix* pObject2Device,
+                                       int width,
+                                       int height,
+                                       int flags) {
+  CFX_DIBitmap* pBitmap = new CFX_DIBitmap;
+  if (!pBitmap->Create(width, height,
+                       pPattern->m_bColored ? FXDIB_Argb : FXDIB_8bppMask)) {
+    delete pBitmap;
+    return NULL;
+  }
+  CFX_FxgeDevice bitmap_device;
+  bitmap_device.Attach(pBitmap);
+  pBitmap->Clear(0);
+  CFX_FloatRect cell_bbox = pPattern->m_BBox;
+  pPattern->m_Pattern2Form.TransformRect(cell_bbox);
+  pObject2Device->TransformRect(cell_bbox);
+  CFX_FloatRect bitmap_rect(0.0f, 0.0f, (FX_FLOAT)width, (FX_FLOAT)height);
+  CFX_Matrix mtAdjust;
+  mtAdjust.MatchRect(bitmap_rect, cell_bbox);
+  CFX_Matrix mtPattern2Bitmap = *pObject2Device;
+  mtPattern2Bitmap.Concat(mtAdjust);
+  CPDF_RenderOptions options;
+  if (!pPattern->m_bColored) {
+    options.m_ColorMode = RENDER_COLOR_ALPHA;
+  }
+  flags |= RENDER_FORCE_HALFTONE;
+  options.m_Flags = flags;
+  CPDF_RenderContext context(pDoc, pCache);
+  context.AppendLayer(pPattern->m_pForm, &mtPattern2Bitmap);
+  context.Render(&bitmap_device, &options, nullptr);
+  return pBitmap;
+}
+void CPDF_RenderStatus::DrawTilingPattern(CPDF_TilingPattern* pPattern,
+                                          const CPDF_PageObject* pPageObj,
+                                          const CFX_Matrix* pObj2Device,
+                                          FX_BOOL bStroke) {
+  if (!pPattern->Load()) {
+    return;
+  }
+  m_pDevice->SaveState();
+  if (pPageObj->IsPath()) {
+    if (!SelectClipPath(pPageObj->AsPath(), pObj2Device, bStroke)) {
+      m_pDevice->RestoreState();
+      return;
+    }
+  } else if (pPageObj->IsImage()) {
+    m_pDevice->SetClip_Rect(pPageObj->GetBBox(pObj2Device));
+  } else {
+    return;
+  }
+  FX_RECT clip_box = m_pDevice->GetClipBox();
+  if (clip_box.IsEmpty()) {
+    m_pDevice->RestoreState();
+    return;
+  }
+  CFX_Matrix dCTM = m_pDevice->GetCTM();
+  FX_FLOAT sa = FXSYS_fabs(dCTM.a);
+  FX_FLOAT sd = FXSYS_fabs(dCTM.d);
+  clip_box.right = clip_box.left + (int32_t)FXSYS_ceil(clip_box.Width() * sa);
+  clip_box.bottom = clip_box.top + (int32_t)FXSYS_ceil(clip_box.Height() * sd);
+  CFX_Matrix mtPattern2Device = pPattern->m_Pattern2Form;
+  mtPattern2Device.Concat(*pObj2Device);
+  GetScaledMatrix(mtPattern2Device);
+  FX_BOOL bAligned = FALSE;
+  if (pPattern->m_BBox.left == 0 && pPattern->m_BBox.bottom == 0 &&
+      pPattern->m_BBox.right == pPattern->m_XStep &&
+      pPattern->m_BBox.top == pPattern->m_YStep &&
+      (mtPattern2Device.IsScaled() || mtPattern2Device.Is90Rotated())) {
+    bAligned = TRUE;
+  }
+  CFX_FloatRect cell_bbox = pPattern->m_BBox;
+  mtPattern2Device.TransformRect(cell_bbox);
+  int width = (int)FXSYS_ceil(cell_bbox.Width());
+  int height = (int)FXSYS_ceil(cell_bbox.Height());
+  if (width == 0) {
+    width = 1;
+  }
+  if (height == 0) {
+    height = 1;
+  }
+  int min_col, max_col, min_row, max_row;
+  CFX_Matrix mtDevice2Pattern;
+  mtDevice2Pattern.SetReverse(mtPattern2Device);
+  CFX_FloatRect clip_box_p(clip_box);
+  clip_box_p.Transform(&mtDevice2Pattern);
+
+  min_col = (int)FXSYS_ceil((clip_box_p.left - pPattern->m_BBox.right) /
+                            pPattern->m_XStep);
+  max_col = (int)FXSYS_floor((clip_box_p.right - pPattern->m_BBox.left) /
+                             pPattern->m_XStep);
+  min_row = (int)FXSYS_ceil((clip_box_p.bottom - pPattern->m_BBox.top) /
+                            pPattern->m_YStep);
+  max_row = (int)FXSYS_floor((clip_box_p.top - pPattern->m_BBox.bottom) /
+                             pPattern->m_YStep);
+
+  if (width > clip_box.Width() || height > clip_box.Height() ||
+      width * height > clip_box.Width() * clip_box.Height()) {
+    CPDF_GraphicStates* pStates = NULL;
+    if (!pPattern->m_bColored) {
+      pStates = CloneObjStates(pPageObj, bStroke);
+    }
+    CPDF_Dictionary* pFormResource = NULL;
+    if (pPattern->m_pForm->m_pFormDict) {
+      pFormResource = pPattern->m_pForm->m_pFormDict->GetDictBy("Resources");
+    }
+    for (int col = min_col; col <= max_col; col++)
+      for (int row = min_row; row <= max_row; row++) {
+        FX_FLOAT orig_x, orig_y;
+        orig_x = col * pPattern->m_XStep;
+        orig_y = row * pPattern->m_YStep;
+        mtPattern2Device.Transform(orig_x, orig_y);
+        CFX_Matrix matrix = *pObj2Device;
+        matrix.Translate(orig_x - mtPattern2Device.e,
+                         orig_y - mtPattern2Device.f);
+        m_pDevice->SaveState();
+        CPDF_RenderStatus status;
+        status.Initialize(m_pContext, m_pDevice, NULL, NULL, this, pStates,
+                          &m_Options, pPattern->m_pForm->m_Transparency,
+                          m_bDropObjects, pFormResource);
+        status.RenderObjectList(pPattern->m_pForm, &matrix);
+        m_pDevice->RestoreState();
+      }
+    m_pDevice->RestoreState();
+    delete pStates;
+    return;
+  }
+  if (bAligned) {
+    int orig_x = FXSYS_round(mtPattern2Device.e);
+    int orig_y = FXSYS_round(mtPattern2Device.f);
+    min_col = (clip_box.left - orig_x) / width;
+    if (clip_box.left < orig_x) {
+      min_col--;
+    }
+    max_col = (clip_box.right - orig_x) / width;
+    if (clip_box.right <= orig_x) {
+      max_col--;
+    }
+    min_row = (clip_box.top - orig_y) / height;
+    if (clip_box.top < orig_y) {
+      min_row--;
+    }
+    max_row = (clip_box.bottom - orig_y) / height;
+    if (clip_box.bottom <= orig_y) {
+      max_row--;
+    }
+  }
+  FX_FLOAT left_offset = cell_bbox.left - mtPattern2Device.e;
+  FX_FLOAT top_offset = cell_bbox.bottom - mtPattern2Device.f;
+  CFX_DIBitmap* pPatternBitmap = NULL;
+  if (width * height < 16) {
+    CFX_DIBitmap* pEnlargedBitmap =
+        DrawPatternBitmap(m_pContext->GetDocument(), m_pContext->GetPageCache(),
+                          pPattern, pObj2Device, 8, 8, m_Options.m_Flags);
+    pPatternBitmap = pEnlargedBitmap->StretchTo(width, height);
+    delete pEnlargedBitmap;
+  } else {
+    pPatternBitmap = DrawPatternBitmap(
+        m_pContext->GetDocument(), m_pContext->GetPageCache(), pPattern,
+        pObj2Device, width, height, m_Options.m_Flags);
+  }
+  if (!pPatternBitmap) {
+    m_pDevice->RestoreState();
+    return;
+  }
+  if (m_Options.m_ColorMode == RENDER_COLOR_GRAY) {
+    pPatternBitmap->ConvertColorScale(m_Options.m_ForeColor,
+                                      m_Options.m_BackColor);
+  }
+  FX_ARGB fill_argb = GetFillArgb(pPageObj);
+  int clip_width = clip_box.right - clip_box.left;
+  int clip_height = clip_box.bottom - clip_box.top;
+  CFX_DIBitmap screen;
+  if (!screen.Create(clip_width, clip_height, FXDIB_Argb)) {
+    return;
+  }
+  screen.Clear(0);
+  FX_DWORD* src_buf = (FX_DWORD*)pPatternBitmap->GetBuffer();
+  for (int col = min_col; col <= max_col; col++) {
+    for (int row = min_row; row <= max_row; row++) {
+      int start_x, start_y;
+      if (bAligned) {
+        start_x = FXSYS_round(mtPattern2Device.e) + col * width - clip_box.left;
+        start_y = FXSYS_round(mtPattern2Device.f) + row * height - clip_box.top;
+      } else {
+        FX_FLOAT orig_x = col * pPattern->m_XStep;
+        FX_FLOAT orig_y = row * pPattern->m_YStep;
+        mtPattern2Device.Transform(orig_x, orig_y);
+        start_x = FXSYS_round(orig_x + left_offset) - clip_box.left;
+        start_y = FXSYS_round(orig_y + top_offset) - clip_box.top;
+      }
+      if (width == 1 && height == 1) {
+        if (start_x < 0 || start_x >= clip_box.Width() || start_y < 0 ||
+            start_y >= clip_box.Height()) {
+          continue;
+        }
+        FX_DWORD* dest_buf =
+            (FX_DWORD*)(screen.GetBuffer() + screen.GetPitch() * start_y +
+                        start_x * 4);
+        if (pPattern->m_bColored) {
+          *dest_buf = *src_buf;
+        } else {
+          *dest_buf = (*(uint8_t*)src_buf << 24) | (fill_argb & 0xffffff);
+        }
+      } else {
+        if (pPattern->m_bColored) {
+          screen.CompositeBitmap(start_x, start_y, width, height,
+                                 pPatternBitmap, 0, 0);
+        } else {
+          screen.CompositeMask(start_x, start_y, width, height, pPatternBitmap,
+                               fill_argb, 0, 0);
+        }
+      }
+    }
+  }
+  CompositeDIBitmap(&screen, clip_box.left, clip_box.top, 0, 255,
+                    FXDIB_BLEND_NORMAL, FALSE);
+  m_pDevice->RestoreState();
+  delete pPatternBitmap;
+}
+void CPDF_RenderStatus::DrawPathWithPattern(const CPDF_PathObject* pPathObj,
+                                            const CFX_Matrix* pObj2Device,
+                                            CPDF_Color* pColor,
+                                            FX_BOOL bStroke) {
+  CPDF_Pattern* pattern = pColor->GetPattern();
+  if (!pattern) {
+    return;
+  }
+  if (pattern->m_PatternType == CPDF_Pattern::TILING) {
+    DrawTilingPattern(static_cast<CPDF_TilingPattern*>(pattern), pPathObj,
+                      pObj2Device, bStroke);
+  } else {
+    DrawShadingPattern(static_cast<CPDF_ShadingPattern*>(pattern), pPathObj,
+                       pObj2Device, bStroke);
+  }
+}
+void CPDF_RenderStatus::ProcessPathPattern(const CPDF_PathObject* pPathObj,
+                                           const CFX_Matrix* pObj2Device,
+                                           int& filltype,
+                                           FX_BOOL& bStroke) {
+  if (filltype) {
+    CPDF_Color& FillColor = *pPathObj->m_ColorState.GetFillColor();
+    if (FillColor.m_pCS && FillColor.m_pCS->GetFamily() == PDFCS_PATTERN) {
+      DrawPathWithPattern(pPathObj, pObj2Device, &FillColor, FALSE);
+      filltype = 0;
+    }
+  }
+  if (bStroke) {
+    CPDF_Color& StrokeColor = *pPathObj->m_ColorState.GetStrokeColor();
+    if (StrokeColor.m_pCS && StrokeColor.m_pCS->GetFamily() == PDFCS_PATTERN) {
+      DrawPathWithPattern(pPathObj, pObj2Device, &StrokeColor, TRUE);
+      bStroke = FALSE;
+    }
+  }
+}
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_pattern_embeddertest.cpp b/core/fpdfapi/fpdf_render/fpdf_render_pattern_embeddertest.cpp
new file mode 100644
index 0000000000..176c923372
--- /dev/null
+++ b/core/fpdfapi/fpdf_render/fpdf_render_pattern_embeddertest.cpp
@@ -0,0 +1,17 @@
+// Copyright 2015 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "testing/embedder_test.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class FPDFRenderPatternEmbeddertest : public EmbedderTest {};
+
+TEST_F(FPDFRenderPatternEmbeddertest, LoadError_547706) {
+  // Test shading where object is a dictionary instead of a stream.
+  EXPECT_TRUE(OpenDocument("bug_547706.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  FPDF_BITMAP bitmap = RenderPage(page);
+  FPDFBitmap_Destroy(bitmap);
+  UnloadPage(page);
+}
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_text.cpp b/core/fpdfapi/fpdf_render/fpdf_render_text.cpp
new file mode 100644
index 0000000000..24b77ed368
--- /dev/null
+++ b/core/fpdfapi/fpdf_render/fpdf_render_text.cpp
@@ -0,0 +1,787 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fpdfapi/fpdf_render/render_int.h"
+
+#include "core/fpdfapi/fpdf_page/pageint.h"
+#include "core/include/fpdfapi/cpdf_dictionary.h"
+#include "core/include/fpdfapi/cpdf_document.h"
+#include "core/include/fpdfapi/fpdf_pageobj.h"
+#include "core/include/fpdfapi/fpdf_render.h"
+#include "core/include/fxge/fx_ge.h"
+
+CPDF_Type3Cache::~CPDF_Type3Cache() {
+  for (const auto& pair : m_SizeMap) {
+    delete pair.second;
+  }
+  m_SizeMap.clear();
+}
+CFX_GlyphBitmap* CPDF_Type3Cache::LoadGlyph(FX_DWORD charcode,
+                                            const CFX_Matrix* pMatrix,
+                                            FX_FLOAT retinaScaleX,
+                                            FX_FLOAT retinaScaleY) {
+  _CPDF_UniqueKeyGen keygen;
+  keygen.Generate(
+      4, FXSYS_round(pMatrix->a * 10000), FXSYS_round(pMatrix->b * 10000),
+      FXSYS_round(pMatrix->c * 10000), FXSYS_round(pMatrix->d * 10000));
+  CFX_ByteStringC FaceGlyphsKey(keygen.m_Key, keygen.m_KeyLen);
+  CPDF_Type3Glyphs* pSizeCache;
+  auto it = m_SizeMap.find(FaceGlyphsKey);
+  if (it == m_SizeMap.end()) {
+    pSizeCache = new CPDF_Type3Glyphs;
+    m_SizeMap[FaceGlyphsKey] = pSizeCache;
+  } else {
+    pSizeCache = it->second;
+  }
+  auto it2 = pSizeCache->m_GlyphMap.find(charcode);
+  if (it2 != pSizeCache->m_GlyphMap.end())
+    return it2->second;
+
+  CFX_GlyphBitmap* pGlyphBitmap =
+      RenderGlyph(pSizeCache, charcode, pMatrix, retinaScaleX, retinaScaleY);
+  pSizeCache->m_GlyphMap[charcode] = pGlyphBitmap;
+  return pGlyphBitmap;
+}
+CPDF_Type3Glyphs::~CPDF_Type3Glyphs() {
+  for (const auto& pair : m_GlyphMap)
+    delete pair.second;
+}
+static int _AdjustBlue(FX_FLOAT pos, int& count, int blues[]) {
+  FX_FLOAT min_distance = 1000000.0f * 1.0f;
+  int closest_pos = -1;
+  for (int i = 0; i < count; i++) {
+    FX_FLOAT distance = (FX_FLOAT)FXSYS_fabs(pos - (FX_FLOAT)blues[i]);
+    if (distance < 1.0f * 80.0f / 100.0f && distance < min_distance) {
+      min_distance = distance;
+      closest_pos = i;
+    }
+  }
+  if (closest_pos >= 0) {
+    return blues[closest_pos];
+  }
+  int new_pos = FXSYS_round(pos);
+  if (count == TYPE3_MAX_BLUES) {
+    return new_pos;
+  }
+  blues[count++] = new_pos;
+  return new_pos;
+}
+void CPDF_Type3Glyphs::AdjustBlue(FX_FLOAT top,
+                                  FX_FLOAT bottom,
+                                  int& top_line,
+                                  int& bottom_line) {
+  top_line = _AdjustBlue(top, m_TopBlueCount, m_TopBlue);
+  bottom_line = _AdjustBlue(bottom, m_BottomBlueCount, m_BottomBlue);
+}
+
+static FX_BOOL _IsScanLine1bpp(uint8_t* pBuf, int width) {
+  int size = width / 8;
+  for (int i = 0; i < size; i++) {
+    if (pBuf[i])
+      return TRUE;
+  }
+  return (width % 8) && (pBuf[width / 8] & (0xff << (8 - width % 8)));
+}
+
+static FX_BOOL _IsScanLine8bpp(uint8_t* pBuf, int width) {
+  for (int i = 0; i < width; i++) {
+    if (pBuf[i] > 0x40)
+      return TRUE;
+  }
+  return FALSE;
+}
+
+static int _DetectFirstLastScan(const CFX_DIBitmap* pBitmap, FX_BOOL bFirst) {
+  int height = pBitmap->GetHeight(), pitch = pBitmap->GetPitch(),
+      width = pBitmap->GetWidth();
+  int bpp = pBitmap->GetBPP();
+  if (bpp > 8) {
+    width *= bpp / 8;
+  }
+  uint8_t* pBuf = pBitmap->GetBuffer();
+  int line = bFirst ? 0 : height - 1;
+  int line_step = bFirst ? 1 : -1;
+  int line_end = bFirst ? height : -1;
+  while (line != line_end) {
+    if (bpp == 1) {
+      if (_IsScanLine1bpp(pBuf + line * pitch, width)) {
+        return line;
+      }
+    } else {
+      if (_IsScanLine8bpp(pBuf + line * pitch, width)) {
+        return line;
+      }
+    }
+    line += line_step;
+  }
+  return -1;
+}
+CFX_GlyphBitmap* CPDF_Type3Cache::RenderGlyph(CPDF_Type3Glyphs* pSize,
+                                              FX_DWORD charcode,
+                                              const CFX_Matrix* pMatrix,
+                                              FX_FLOAT retinaScaleX,
+                                              FX_FLOAT retinaScaleY) {
+  const CPDF_Type3Char* pChar = m_pFont->LoadChar(charcode);
+  if (!pChar || !pChar->m_pBitmap)
+    return nullptr;
+
+  CFX_DIBitmap* pBitmap = pChar->m_pBitmap;
+  CFX_Matrix image_matrix, text_matrix;
+  image_matrix = pChar->m_ImageMatrix;
+  text_matrix.Set(pMatrix->a, pMatrix->b, pMatrix->c, pMatrix->d, 0, 0);
+  image_matrix.Concat(text_matrix);
+  CFX_DIBitmap* pResBitmap = NULL;
+  int left, top;
+  if (FXSYS_fabs(image_matrix.b) < FXSYS_fabs(image_matrix.a) / 100 &&
+      FXSYS_fabs(image_matrix.c) < FXSYS_fabs(image_matrix.d) / 100) {
+    int top_line, bottom_line;
+    top_line = _DetectFirstLastScan(pBitmap, TRUE);
+    bottom_line = _DetectFirstLastScan(pBitmap, FALSE);
+    if (top_line == 0 && bottom_line == pBitmap->GetHeight() - 1) {
+      FX_FLOAT top_y = image_matrix.d + image_matrix.f;
+      FX_FLOAT bottom_y = image_matrix.f;
+      FX_BOOL bFlipped = top_y > bottom_y;
+      if (bFlipped) {
+        FX_FLOAT temp = top_y;
+        top_y = bottom_y;
+        bottom_y = temp;
+      }
+      pSize->AdjustBlue(top_y, bottom_y, top_line, bottom_line);
+      pResBitmap = pBitmap->StretchTo(
+          (int)(FXSYS_round(image_matrix.a) * retinaScaleX),
+          (int)((bFlipped ? top_line - bottom_line : bottom_line - top_line) *
+                retinaScaleY));
+      top = top_line;
+      if (image_matrix.a < 0) {
+        image_matrix.Scale(retinaScaleX, retinaScaleY);
+        left = FXSYS_round(image_matrix.e + image_matrix.a);
+      } else {
+        left = FXSYS_round(image_matrix.e);
+      }
+    } else {
+    }
+  }
+  if (!pResBitmap) {
+    image_matrix.Scale(retinaScaleX, retinaScaleY);
+    pResBitmap = pBitmap->TransformTo(&image_matrix, left, top);
+  }
+  if (!pResBitmap) {
+    return NULL;
+  }
+  CFX_GlyphBitmap* pGlyph = new CFX_GlyphBitmap;
+  pGlyph->m_Left = left;
+  pGlyph->m_Top = -top;
+  pGlyph->m_Bitmap.TakeOver(pResBitmap);
+  delete pResBitmap;
+  return pGlyph;
+}
+void _CPDF_UniqueKeyGen::Generate(int count, ...) {
+  va_list argList;
+  va_start(argList, count);
+  for (int i = 0; i < count; i++) {
+    int p = va_arg(argList, int);
+    ((FX_DWORD*)m_Key)[i] = p;
+  }
+  va_end(argList);
+  m_KeyLen = count * sizeof(FX_DWORD);
+}
+FX_BOOL CPDF_RenderStatus::ProcessText(const CPDF_TextObject* textobj,
+                                       const CFX_Matrix* pObj2Device,
+                                       CFX_PathData* pClippingPath) {
+  if (textobj->m_nChars == 0) {
+    return TRUE;
+  }
+  int text_render_mode = textobj->m_TextState.GetObject()->m_TextMode;
+  if (text_render_mode == 3) {
+    return TRUE;
+  }
+  CPDF_Font* pFont = textobj->m_TextState.GetFont();
+  if (pFont->IsType3Font()) {
+    return ProcessType3Text(textobj, pObj2Device);
+  }
+  FX_BOOL bFill = FALSE, bStroke = FALSE, bClip = FALSE;
+  if (pClippingPath) {
+    bClip = TRUE;
+  } else {
+    switch (text_render_mode) {
+      case 0:
+      case 4:
+        bFill = TRUE;
+        break;
+      case 1:
+      case 5:
+        if (!pFont->GetFace() &&
+            !(pFont->GetSubstFont()->m_SubstFlags & FXFONT_SUBST_GLYPHPATH)) {
+          bFill = TRUE;
+        } else {
+          bStroke = TRUE;
+        }
+        break;
+      case 2:
+      case 6:
+        if (!pFont->GetFace() &&
+            !(pFont->GetSubstFont()->m_SubstFlags & FXFONT_SUBST_GLYPHPATH)) {
+          bFill = TRUE;
+        } else {
+          bFill = bStroke = TRUE;
+        }
+        break;
+      case 3:
+      case 7:
+        return TRUE;
+      default:
+        bFill = TRUE;
+    }
+  }
+  FX_ARGB stroke_argb = 0, fill_argb = 0;
+  FX_BOOL bPattern = FALSE;
+  if (bStroke) {
+    if (textobj->m_ColorState.GetStrokeColor()->IsPattern()) {
+      bPattern = TRUE;
+    } else {
+      stroke_argb = GetStrokeArgb(textobj);
+    }
+  }
+  if (bFill) {
+    if (textobj->m_ColorState.GetFillColor()->IsPattern()) {
+      bPattern = TRUE;
+    } else {
+      fill_argb = GetFillArgb(textobj);
+    }
+  }
+  CFX_Matrix text_matrix;
+  textobj->GetTextMatrix(&text_matrix);
+  if (IsAvailableMatrix(text_matrix) == FALSE) {
+    return TRUE;
+  }
+  FX_FLOAT font_size = textobj->m_TextState.GetFontSize();
+  if (bPattern) {
+    DrawTextPathWithPattern(textobj, pObj2Device, pFont, font_size,
+                            &text_matrix, bFill, bStroke);
+    return TRUE;
+  }
+  if (bClip || bStroke) {
+    const CFX_Matrix* pDeviceMatrix = pObj2Device;
+    CFX_Matrix device_matrix;
+    if (bStroke) {
+      const FX_FLOAT* pCTM = textobj->m_TextState.GetObject()->m_CTM;
+      if (pCTM[0] != 1.0f || pCTM[3] != 1.0f) {
+        CFX_Matrix ctm(pCTM[0], pCTM[1], pCTM[2], pCTM[3], 0, 0);
+        text_matrix.ConcatInverse(ctm);
+        device_matrix.Copy(ctm);
+        device_matrix.Concat(*pObj2Device);
+        pDeviceMatrix = &device_matrix;
+      }
+    }
+    int flag = 0;
+    if (bStroke && bFill) {
+      flag |= FX_FILL_STROKE;
+      flag |= FX_STROKE_TEXT_MODE;
+    }
+    const CPDF_GeneralStateData* pGeneralData =
+        ((CPDF_PageObject*)textobj)->m_GeneralState;
+    if (pGeneralData && pGeneralData->m_StrokeAdjust) {
+      flag |= FX_STROKE_ADJUST;
+    }
+    if (m_Options.m_Flags & RENDER_NOTEXTSMOOTH) {
+      flag |= FXFILL_NOPATHSMOOTH;
+    }
+    return CPDF_TextRenderer::DrawTextPath(
+        m_pDevice, textobj->m_nChars, textobj->m_pCharCodes,
+        textobj->m_pCharPos, pFont, font_size, &text_matrix, pDeviceMatrix,
+        textobj->m_GraphState, fill_argb, stroke_argb, pClippingPath, flag);
+  }
+  text_matrix.Concat(*pObj2Device);
+  return CPDF_TextRenderer::DrawNormalText(
+      m_pDevice, textobj->m_nChars, textobj->m_pCharCodes, textobj->m_pCharPos,
+      pFont, font_size, &text_matrix, fill_argb, &m_Options);
+}
+CPDF_Type3Cache* CPDF_RenderStatus::GetCachedType3(CPDF_Type3Font* pFont) {
+  if (!pFont->m_pDocument) {
+    return NULL;
+  }
+  pFont->m_pDocument->GetPageData()->GetFont(pFont->GetFontDict(), FALSE);
+  return pFont->m_pDocument->GetRenderData()->GetCachedType3(pFont);
+}
+static void ReleaseCachedType3(CPDF_Type3Font* pFont) {
+  if (!pFont->m_pDocument) {
+    return;
+  }
+  pFont->m_pDocument->GetRenderData()->ReleaseCachedType3(pFont);
+  pFont->m_pDocument->GetPageData()->ReleaseFont(pFont->GetFontDict());
+}
+FX_BOOL CPDF_Type3Char::LoadBitmap(CPDF_RenderContext* pContext) {
+  if (m_pBitmap || !m_pForm) {
+    return TRUE;
+  }
+  if (m_pForm->GetPageObjectList()->size() == 1 && !m_bColored) {
+    auto& pPageObj = m_pForm->GetPageObjectList()->front();
+    if (pPageObj->IsImage()) {
+      m_ImageMatrix = pPageObj->AsImage()->m_Matrix;
+      const CFX_DIBSource* pSource =
+          pPageObj->AsImage()->m_pImage->LoadDIBSource();
+      if (pSource) {
+        m_pBitmap = pSource->Clone();
+        delete pSource;
+      }
+      delete m_pForm;
+      m_pForm = NULL;
+      return TRUE;
+    }
+  }
+  return FALSE;
+}
+class CPDF_RefType3Cache {
+ public:
+  CPDF_RefType3Cache(CPDF_Type3Font* pType3Font) {
+    m_dwCount = 0;
+    m_pType3Font = pType3Font;
+  }
+  ~CPDF_RefType3Cache() {
+    while (m_dwCount--) {
+      ReleaseCachedType3(m_pType3Font);
+    }
+  }
+  FX_DWORD m_dwCount;
+  CPDF_Type3Font* m_pType3Font;
+};
+FX_BOOL CPDF_RenderStatus::ProcessType3Text(const CPDF_TextObject* textobj,
+                                            const CFX_Matrix* pObj2Device) {
+  CPDF_Type3Font* pType3Font = textobj->m_TextState.GetFont()->AsType3Font();
+  for (int j = 0; j < m_Type3FontCache.GetSize(); j++) {
+    if (m_Type3FontCache.GetAt(j) == pType3Font)
+      return TRUE;
+  }
+  CFX_Matrix dCTM = m_pDevice->GetCTM();
+  FX_FLOAT sa = FXSYS_fabs(dCTM.a);
+  FX_FLOAT sd = FXSYS_fabs(dCTM.d);
+  CFX_Matrix text_matrix;
+  textobj->GetTextMatrix(&text_matrix);
+  CFX_Matrix char_matrix = pType3Font->GetFontMatrix();
+  FX_FLOAT font_size = textobj->m_TextState.GetFontSize();
+  char_matrix.Scale(font_size, font_size);
+  FX_ARGB fill_argb = GetFillArgb(textobj, TRUE);
+  int fill_alpha = FXARGB_A(fill_argb);
+  int device_class = m_pDevice->GetDeviceClass();
+  FXTEXT_GLYPHPOS* pGlyphAndPos = NULL;
+  if (device_class == FXDC_DISPLAY) {
+    pGlyphAndPos = FX_Alloc(FXTEXT_GLYPHPOS, textobj->m_nChars);
+  } else if (fill_alpha < 255) {
+    return FALSE;
+  }
+  CPDF_RefType3Cache refTypeCache(pType3Font);
+  FX_DWORD* pChars = textobj->m_pCharCodes;
+  if (textobj->m_nChars == 1) {
+    pChars = (FX_DWORD*)(&textobj->m_pCharCodes);
+  }
+  for (int iChar = 0; iChar < textobj->m_nChars; iChar++) {
+    FX_DWORD charcode = pChars[iChar];
+    if (charcode == (FX_DWORD)-1) {
+      continue;
+    }
+    CPDF_Type3Char* pType3Char = pType3Font->LoadChar(charcode);
+    if (!pType3Char) {
+      continue;
+    }
+    CFX_Matrix matrix = char_matrix;
+    matrix.e += iChar ? textobj->m_pCharPos[iChar - 1] : 0;
+    matrix.Concat(text_matrix);
+    matrix.Concat(*pObj2Device);
+    if (!pType3Char->LoadBitmap(m_pContext)) {
+      if (pGlyphAndPos) {
+        for (int i = 0; i < iChar; i++) {
+          FXTEXT_GLYPHPOS& glyph = pGlyphAndPos[i];
+          if (!glyph.m_pGlyph) {
+            continue;
+          }
+          m_pDevice->SetBitMask(&glyph.m_pGlyph->m_Bitmap,
+                                glyph.m_OriginX + glyph.m_pGlyph->m_Left,
+                                glyph.m_OriginY - glyph.m_pGlyph->m_Top,
+                                fill_argb);
+        }
+        FX_Free(pGlyphAndPos);
+        pGlyphAndPos = NULL;
+      }
+      CPDF_GraphicStates* pStates = CloneObjStates(textobj, FALSE);
+      CPDF_RenderOptions Options = m_Options;
+      Options.m_Flags |= RENDER_FORCE_HALFTONE | RENDER_RECT_AA;
+      Options.m_Flags &= ~RENDER_FORCE_DOWNSAMPLE;
+      CPDF_Dictionary* pFormResource = NULL;
+      if (pType3Char->m_pForm && pType3Char->m_pForm->m_pFormDict) {
+        pFormResource =
+            pType3Char->m_pForm->m_pFormDict->GetDictBy("Resources");
+      }
+      if (fill_alpha == 255) {
+        CPDF_RenderStatus status;
+        status.Initialize(m_pContext, m_pDevice, NULL, NULL, this, pStates,
+                          &Options, pType3Char->m_pForm->m_Transparency,
+                          m_bDropObjects, pFormResource, FALSE, pType3Char,
+                          fill_argb);
+        status.m_Type3FontCache.Append(m_Type3FontCache);
+        status.m_Type3FontCache.Add(pType3Font);
+        m_pDevice->SaveState();
+        status.RenderObjectList(pType3Char->m_pForm, &matrix);
+        m_pDevice->RestoreState();
+      } else {
+        CFX_FloatRect rect_f = pType3Char->m_pForm->CalcBoundingBox();
+        rect_f.Transform(&matrix);
+        FX_RECT rect = rect_f.GetOutterRect();
+        CFX_FxgeDevice bitmap_device;
+        if (!bitmap_device.Create((int)(rect.Width() * sa),
+                                  (int)(rect.Height() * sd), FXDIB_Argb)) {
+          return TRUE;
+        }
+        bitmap_device.GetBitmap()->Clear(0);
+        CPDF_RenderStatus status;
+        status.Initialize(m_pContext, &bitmap_device, NULL, NULL, this, pStates,
+                          &Options, pType3Char->m_pForm->m_Transparency,
+                          m_bDropObjects, pFormResource, FALSE, pType3Char,
+                          fill_argb);
+        status.m_Type3FontCache.Append(m_Type3FontCache);
+        status.m_Type3FontCache.Add(pType3Font);
+        matrix.TranslateI(-rect.left, -rect.top);
+        matrix.Scale(sa, sd);
+        status.RenderObjectList(pType3Char->m_pForm, &matrix);
+        m_pDevice->SetDIBits(bitmap_device.GetBitmap(), rect.left, rect.top);
+      }
+      delete pStates;
+    } else if (pType3Char->m_pBitmap) {
+      if (device_class == FXDC_DISPLAY) {
+        CPDF_Type3Cache* pCache = GetCachedType3(pType3Font);
+        refTypeCache.m_dwCount++;
+        CFX_GlyphBitmap* pBitmap = pCache->LoadGlyph(charcode, &matrix, sa, sd);
+        if (!pBitmap) {
+          continue;
+        }
+        int origin_x = FXSYS_round(matrix.e);
+        int origin_y = FXSYS_round(matrix.f);
+        if (pGlyphAndPos) {
+          pGlyphAndPos[iChar].m_pGlyph = pBitmap;
+          pGlyphAndPos[iChar].m_OriginX = origin_x;
+          pGlyphAndPos[iChar].m_OriginY = origin_y;
+        } else {
+          m_pDevice->SetBitMask(&pBitmap->m_Bitmap, origin_x + pBitmap->m_Left,
+                                origin_y - pBitmap->m_Top, fill_argb);
+        }
+      } else {
+        CFX_Matrix image_matrix = pType3Char->m_ImageMatrix;
+        image_matrix.Concat(matrix);
+        CPDF_ImageRenderer renderer;
+        if (renderer.Start(this, pType3Char->m_pBitmap, fill_argb, 255,
+                           &image_matrix, 0, FALSE)) {
+          renderer.Continue(NULL);
+        }
+        if (!renderer.m_Result) {
+          return FALSE;
+        }
+      }
+    }
+  }
+  if (pGlyphAndPos) {
+    FX_RECT rect =
+        FXGE_GetGlyphsBBox(pGlyphAndPos, textobj->m_nChars, 0, sa, sd);
+    CFX_DIBitmap bitmap;
+    if (!bitmap.Create((int)(rect.Width() * sa), (int)(rect.Height() * sd),
+                       FXDIB_8bppMask)) {
+      FX_Free(pGlyphAndPos);
+      return TRUE;
+    }
+    bitmap.Clear(0);
+    for (int iChar = 0; iChar < textobj->m_nChars; iChar++) {
+      FXTEXT_GLYPHPOS& glyph = pGlyphAndPos[iChar];
+      if (!glyph.m_pGlyph) {
+        continue;
+      }
+      bitmap.TransferBitmap(
+          (int)((glyph.m_OriginX + glyph.m_pGlyph->m_Left - rect.left) * sa),
+          (int)((glyph.m_OriginY - glyph.m_pGlyph->m_Top - rect.top) * sd),
+          glyph.m_pGlyph->m_Bitmap.GetWidth(),
+          glyph.m_pGlyph->m_Bitmap.GetHeight(), &glyph.m_pGlyph->m_Bitmap, 0,
+          0);
+    }
+    m_pDevice->SetBitMask(&bitmap, rect.left, rect.top, fill_argb);
+    FX_Free(pGlyphAndPos);
+  }
+  return TRUE;
+}
+class CPDF_CharPosList {
+ public:
+  CPDF_CharPosList();
+  ~CPDF_CharPosList();
+  void Load(int nChars,
+            FX_DWORD* pCharCodes,
+            FX_FLOAT* pCharPos,
+            CPDF_Font* pFont,
+            FX_FLOAT font_size);
+  FXTEXT_CHARPOS* m_pCharPos;
+  FX_DWORD m_nChars;
+};
+
+CPDF_CharPosList::CPDF_CharPosList() {
+  m_pCharPos = NULL;
+}
+CPDF_CharPosList::~CPDF_CharPosList() {
+  FX_Free(m_pCharPos);
+}
+void CPDF_CharPosList::Load(int nChars,
+                            FX_DWORD* pCharCodes,
+                            FX_FLOAT* pCharPos,
+                            CPDF_Font* pFont,
+                            FX_FLOAT FontSize) {
+  m_pCharPos = FX_Alloc(FXTEXT_CHARPOS, nChars);
+  m_nChars = 0;
+  CPDF_CIDFont* pCIDFont = pFont->AsCIDFont();
+  FX_BOOL bVertWriting = pCIDFont && pCIDFont->IsVertWriting();
+  for (int iChar = 0; iChar < nChars; iChar++) {
+    FX_DWORD CharCode =
+        nChars == 1 ? (FX_DWORD)(uintptr_t)pCharCodes : pCharCodes[iChar];
+    if (CharCode == (FX_DWORD)-1) {
+      continue;
+    }
+    FX_BOOL bVert = FALSE;
+    FXTEXT_CHARPOS& charpos = m_pCharPos[m_nChars++];
+    if (pCIDFont) {
+      charpos.m_bFontStyle = pCIDFont->IsFontStyleFromCharCode(CharCode);
+    }
+    charpos.m_GlyphIndex = pFont->GlyphFromCharCode(CharCode, &bVert);
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+    charpos.m_ExtGID = pFont->GlyphFromCharCodeExt(CharCode);
+#endif
+    if (!pFont->IsEmbedded() && !pFont->IsCIDFont()) {
+      charpos.m_FontCharWidth = pFont->GetCharWidthF(CharCode);
+    } else {
+      charpos.m_FontCharWidth = 0;
+    }
+    charpos.m_OriginX = iChar ? pCharPos[iChar - 1] : 0;
+    charpos.m_OriginY = 0;
+    charpos.m_bGlyphAdjust = FALSE;
+    if (!pCIDFont) {
+      continue;
+    }
+    FX_WORD CID = pCIDFont->CIDFromCharCode(CharCode);
+    if (bVertWriting) {
+      charpos.m_OriginY = charpos.m_OriginX;
+      charpos.m_OriginX = 0;
+      short vx, vy;
+      pCIDFont->GetVertOrigin(CID, vx, vy);
+      charpos.m_OriginX -= FontSize * vx / 1000;
+      charpos.m_OriginY -= FontSize * vy / 1000;
+    }
+    const uint8_t* pTransform = pCIDFont->GetCIDTransform(CID);
+    if (pTransform && !bVert) {
+      charpos.m_AdjustMatrix[0] = pCIDFont->CIDTransformToFloat(pTransform[0]);
+      charpos.m_AdjustMatrix[2] = pCIDFont->CIDTransformToFloat(pTransform[2]);
+      charpos.m_AdjustMatrix[1] = pCIDFont->CIDTransformToFloat(pTransform[1]);
+      charpos.m_AdjustMatrix[3] = pCIDFont->CIDTransformToFloat(pTransform[3]);
+      charpos.m_OriginX +=
+          pCIDFont->CIDTransformToFloat(pTransform[4]) * FontSize;
+      charpos.m_OriginY +=
+          pCIDFont->CIDTransformToFloat(pTransform[5]) * FontSize;
+      charpos.m_bGlyphAdjust = TRUE;
+    }
+  }
+}
+FX_BOOL CPDF_TextRenderer::DrawTextPath(CFX_RenderDevice* pDevice,
+                                        int nChars,
+                                        FX_DWORD* pCharCodes,
+                                        FX_FLOAT* pCharPos,
+                                        CPDF_Font* pFont,
+                                        FX_FLOAT font_size,
+                                        const CFX_Matrix* pText2User,
+                                        const CFX_Matrix* pUser2Device,
+                                        const CFX_GraphStateData* pGraphState,
+                                        FX_ARGB fill_argb,
+                                        FX_ARGB stroke_argb,
+                                        CFX_PathData* pClippingPath,
+                                        int nFlag) {
+  CFX_FontCache* pCache =
+      pFont->m_pDocument ? pFont->m_pDocument->GetRenderData()->GetFontCache()
+                         : NULL;
+  CPDF_CharPosList CharPosList;
+  CharPosList.Load(nChars, pCharCodes, pCharPos, pFont, font_size);
+  return pDevice->DrawTextPath(CharPosList.m_nChars, CharPosList.m_pCharPos,
+                               &pFont->m_Font, pCache, font_size, pText2User,
+                               pUser2Device, pGraphState, fill_argb,
+                               stroke_argb, pClippingPath, nFlag);
+}
+void CPDF_TextRenderer::DrawTextString(CFX_RenderDevice* pDevice,
+                                       int left,
+                                       int top,
+                                       CPDF_Font* pFont,
+                                       int height,
+                                       const CFX_ByteString& str,
+                                       FX_ARGB argb) {
+  FX_RECT font_bbox;
+  pFont->GetFontBBox(font_bbox);
+  FX_FLOAT font_size =
+      (FX_FLOAT)height * 1000.0f / (FX_FLOAT)(font_bbox.top - font_bbox.bottom);
+  FX_FLOAT origin_x = (FX_FLOAT)left;
+  FX_FLOAT origin_y =
+      (FX_FLOAT)top + font_size * (FX_FLOAT)font_bbox.top / 1000.0f;
+  CFX_Matrix matrix(1.0f, 0, 0, -1.0f, 0, 0);
+  DrawTextString(pDevice, origin_x, origin_y, pFont, font_size, &matrix, str,
+                 argb);
+}
+void CPDF_TextRenderer::DrawTextString(CFX_RenderDevice* pDevice,
+                                       FX_FLOAT origin_x,
+                                       FX_FLOAT origin_y,
+                                       CPDF_Font* pFont,
+                                       FX_FLOAT font_size,
+                                       const CFX_Matrix* pMatrix,
+                                       const CFX_ByteString& str,
+                                       FX_ARGB fill_argb,
+                                       FX_ARGB stroke_argb,
+                                       const CFX_GraphStateData* pGraphState,
+                                       const CPDF_RenderOptions* pOptions) {
+  int nChars = pFont->CountChar(str, str.GetLength());
+  if (nChars == 0) {
+    return;
+  }
+  FX_DWORD charcode;
+  int offset = 0;
+  FX_DWORD* pCharCodes;
+  FX_FLOAT* pCharPos;
+  if (nChars == 1) {
+    charcode = pFont->GetNextChar(str, str.GetLength(), offset);
+    pCharCodes = (FX_DWORD*)(uintptr_t)charcode;
+    pCharPos = NULL;
+  } else {
+    pCharCodes = FX_Alloc(FX_DWORD, nChars);
+    pCharPos = FX_Alloc(FX_FLOAT, nChars - 1);
+    FX_FLOAT cur_pos = 0;
+    for (int i = 0; i < nChars; i++) {
+      pCharCodes[i] = pFont->GetNextChar(str, str.GetLength(), offset);
+      if (i) {
+        pCharPos[i - 1] = cur_pos;
+      }
+      cur_pos += pFont->GetCharWidthF(pCharCodes[i]) * font_size / 1000;
+    }
+  }
+  CFX_Matrix matrix;
+  if (pMatrix)
+    matrix = *pMatrix;
+
+  matrix.e = origin_x;
+  matrix.f = origin_y;
+
+  if (!pFont->IsType3Font()) {
+    if (stroke_argb == 0) {
+      DrawNormalText(pDevice, nChars, pCharCodes, pCharPos, pFont, font_size,
+                     &matrix, fill_argb, pOptions);
+    } else {
+      DrawTextPath(pDevice, nChars, pCharCodes, pCharPos, pFont, font_size,
+                   &matrix, NULL, pGraphState, fill_argb, stroke_argb, NULL);
+    }
+  }
+
+  if (nChars > 1) {
+    FX_Free(pCharCodes);
+    FX_Free(pCharPos);
+  }
+}
+FX_BOOL CPDF_TextRenderer::DrawNormalText(CFX_RenderDevice* pDevice,
+                                          int nChars,
+                                          FX_DWORD* pCharCodes,
+                                          FX_FLOAT* pCharPos,
+                                          CPDF_Font* pFont,
+                                          FX_FLOAT font_size,
+                                          const CFX_Matrix* pText2Device,
+                                          FX_ARGB fill_argb,
+                                          const CPDF_RenderOptions* pOptions) {
+  CFX_FontCache* pCache =
+      pFont->m_pDocument ? pFont->m_pDocument->GetRenderData()->GetFontCache()
+                         : NULL;
+  CPDF_CharPosList CharPosList;
+  CharPosList.Load(nChars, pCharCodes, pCharPos, pFont, font_size);
+  int FXGE_flags = 0;
+  if (pOptions) {
+    FX_DWORD dwFlags = pOptions->m_Flags;
+    if (dwFlags & RENDER_CLEARTYPE) {
+      FXGE_flags |= FXTEXT_CLEARTYPE;
+      if (dwFlags & RENDER_BGR_STRIPE) {
+        FXGE_flags |= FXTEXT_BGR_STRIPE;
+      }
+    }
+    if (dwFlags & RENDER_NOTEXTSMOOTH) {
+      FXGE_flags |= FXTEXT_NOSMOOTH;
+    }
+    if (dwFlags & RENDER_PRINTGRAPHICTEXT) {
+      FXGE_flags |= FXTEXT_PRINTGRAPHICTEXT;
+    }
+    if (dwFlags & RENDER_NO_NATIVETEXT) {
+      FXGE_flags |= FXTEXT_NO_NATIVETEXT;
+    }
+    if (dwFlags & RENDER_PRINTIMAGETEXT) {
+      FXGE_flags |= FXTEXT_PRINTIMAGETEXT;
+    }
+  } else {
+    FXGE_flags = FXTEXT_CLEARTYPE;
+  }
+  if (pFont->IsCIDFont()) {
+    FXGE_flags |= FXFONT_CIDFONT;
+  }
+  return pDevice->DrawNormalText(CharPosList.m_nChars, CharPosList.m_pCharPos,
+                                 &pFont->m_Font, pCache, font_size,
+                                 pText2Device, fill_argb, FXGE_flags);
+}
+void CPDF_RenderStatus::DrawTextPathWithPattern(const CPDF_TextObject* textobj,
+                                                const CFX_Matrix* pObj2Device,
+                                                CPDF_Font* pFont,
+                                                FX_FLOAT font_size,
+                                                const CFX_Matrix* pTextMatrix,
+                                                FX_BOOL bFill,
+                                                FX_BOOL bStroke) {
+  if (!bStroke) {
+    CPDF_PathObject path;
+    CPDF_TextObject* pCopy = textobj->Clone();
+    path.m_bStroke = FALSE;
+    path.m_FillType = FXFILL_WINDING;
+    path.m_ClipPath.AppendTexts(&pCopy, 1);
+    path.m_ColorState = textobj->m_ColorState;
+    path.m_Path.New()->AppendRect(textobj->m_Left, textobj->m_Bottom,
+                                  textobj->m_Right, textobj->m_Top);
+    path.m_Left = textobj->m_Left;
+    path.m_Bottom = textobj->m_Bottom;
+    path.m_Right = textobj->m_Right;
+    path.m_Top = textobj->m_Top;
+    RenderSingleObject(&path, pObj2Device);
+    return;
+  }
+  CFX_FontCache* pCache;
+  if (pFont->m_pDocument) {
+    pCache = pFont->m_pDocument->GetRenderData()->GetFontCache();
+  } else {
+    pCache = CFX_GEModule::Get()->GetFontCache();
+  }
+  CFX_FaceCache* pFaceCache = pCache->GetCachedFace(&pFont->m_Font);
+  FX_FONTCACHE_DEFINE(pCache, &pFont->m_Font);
+  CPDF_CharPosList CharPosList;
+  CharPosList.Load(textobj->m_nChars, textobj->m_pCharCodes,
+                   textobj->m_pCharPos, pFont, font_size);
+  for (FX_DWORD i = 0; i < CharPosList.m_nChars; i++) {
+    FXTEXT_CHARPOS& charpos = CharPosList.m_pCharPos[i];
+    const CFX_PathData* pPath = pFaceCache->LoadGlyphPath(
+        &pFont->m_Font, charpos.m_GlyphIndex, charpos.m_FontCharWidth);
+    if (!pPath) {
+      continue;
+    }
+    CPDF_PathObject path;
+    path.m_GraphState = textobj->m_GraphState;
+    path.m_ColorState = textobj->m_ColorState;
+    CFX_Matrix matrix;
+    if (charpos.m_bGlyphAdjust)
+      matrix.Set(charpos.m_AdjustMatrix[0], charpos.m_AdjustMatrix[1],
+                 charpos.m_AdjustMatrix[2], charpos.m_AdjustMatrix[3], 0, 0);
+    matrix.Concat(font_size, 0, 0, font_size, charpos.m_OriginX,
+                  charpos.m_OriginY);
+    path.m_Path.New()->Append(pPath, &matrix);
+    path.m_Matrix = *pTextMatrix;
+    path.m_bStroke = bStroke;
+    path.m_FillType = bFill ? FXFILL_WINDING : 0;
+    path.CalcBoundingBox();
+    ProcessPath(&path, pObj2Device);
+  }
+}
diff --git a/core/fpdfapi/fpdf_render/render_int.h b/core/fpdfapi/fpdf_render/render_int.h
new file mode 100644
index 0000000000..c15612466c
--- /dev/null
+++ b/core/fpdfapi/fpdf_render/render_int.h
@@ -0,0 +1,619 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FPDFAPI_FPDF_RENDER_RENDER_INT_H_
+#define CORE_FPDFAPI_FPDF_RENDER_RENDER_INT_H_
+
+#include <map>
+#include <memory>
+
+#include "core/include/fpdfapi/fpdf_pageobj.h"
+#include "core/include/fpdfapi/fpdf_render.h"
+
+class CFX_GlyphBitmap;
+class CFX_ImageTransformer;
+class CPDF_ImageCacheEntry;
+class CPDF_ImageLoaderHandle;
+class ICodec_ScanlineDecoder;
+
+#define TYPE3_MAX_BLUES 16
+
+class CPDF_Type3Glyphs {
+ public:
+  CPDF_Type3Glyphs() : m_TopBlueCount(0), m_BottomBlueCount(0) {}
+  ~CPDF_Type3Glyphs();
+  void AdjustBlue(FX_FLOAT top,
+                  FX_FLOAT bottom,
+                  int& top_line,
+                  int& bottom_line);
+
+  std::map<FX_DWORD, CFX_GlyphBitmap*> m_GlyphMap;
+  int m_TopBlue[TYPE3_MAX_BLUES];
+  int m_BottomBlue[TYPE3_MAX_BLUES];
+  int m_TopBlueCount;
+  int m_BottomBlueCount;
+};
+class CPDF_Type3Cache {
+ public:
+  explicit CPDF_Type3Cache(CPDF_Type3Font* pFont) : m_pFont(pFont) {}
+  ~CPDF_Type3Cache();
+
+  CFX_GlyphBitmap* LoadGlyph(FX_DWORD charcode,
+                             const CFX_Matrix* pMatrix,
+                             FX_FLOAT retinaScaleX = 1.0f,
+                             FX_FLOAT retinaScaleY = 1.0f);
+
+ protected:
+  CFX_GlyphBitmap* RenderGlyph(CPDF_Type3Glyphs* pSize,
+                               FX_DWORD charcode,
+                               const CFX_Matrix* pMatrix,
+                               FX_FLOAT retinaScaleX = 1.0f,
+                               FX_FLOAT retinaScaleY = 1.0f);
+  CPDF_Type3Font* const m_pFont;
+  std::map<CFX_ByteString, CPDF_Type3Glyphs*> m_SizeMap;
+};
+
+class CPDF_TransferFunc {
+ public:
+  explicit CPDF_TransferFunc(CPDF_Document* pDoc);
+
+  FX_COLORREF TranslateColor(FX_COLORREF src) const;
+  CFX_DIBSource* TranslateImage(const CFX_DIBSource* pSrc,
+                                FX_BOOL bAutoDropSrc);
+
+  CPDF_Document* const m_pPDFDoc;
+  FX_BOOL m_bIdentity;
+  uint8_t m_Samples[256 * 3];
+};
+
+class CPDF_DocRenderData {
+ public:
+  CPDF_DocRenderData(CPDF_Document* pPDFDoc = NULL);
+  ~CPDF_DocRenderData();
+  CPDF_Type3Cache* GetCachedType3(CPDF_Type3Font* pFont);
+  CPDF_TransferFunc* GetTransferFunc(CPDF_Object* pObj);
+  CFX_FontCache* GetFontCache() { return m_pFontCache; }
+  void Clear(FX_BOOL bRelease = FALSE);
+  void ReleaseCachedType3(CPDF_Type3Font* pFont);
+  void ReleaseTransferFunc(CPDF_Object* pObj);
+
+ private:
+  using CPDF_Type3CacheMap =
+      std::map<CPDF_Font*, CPDF_CountedObject<CPDF_Type3Cache>*>;
+  using CPDF_TransferFuncMap =
+      std::map<CPDF_Object*, CPDF_CountedObject<CPDF_TransferFunc>*>;
+
+  CPDF_Document* m_pPDFDoc;
+  CFX_FontCache* m_pFontCache;
+  CPDF_Type3CacheMap m_Type3FaceMap;
+  CPDF_TransferFuncMap m_TransferFuncMap;
+};
+
+class IPDF_ObjectRenderer {
+ public:
+  static IPDF_ObjectRenderer* Create();
+  virtual ~IPDF_ObjectRenderer() {}
+  virtual FX_BOOL Start(CPDF_RenderStatus* pRenderStatus,
+                        const CPDF_PageObject* pObj,
+                        const CFX_Matrix* pObj2Device,
+                        FX_BOOL bStdCS,
+                        int blendType = FXDIB_BLEND_NORMAL) = 0;
+  virtual FX_BOOL Continue(IFX_Pause* pPause) = 0;
+  FX_BOOL m_Result;
+};
+
+class CPDF_RenderStatus {
+ public:
+  CPDF_RenderStatus();
+  ~CPDF_RenderStatus();
+  FX_BOOL Initialize(class CPDF_RenderContext* pContext,
+                     CFX_RenderDevice* pDevice,
+                     const CFX_Matrix* pDeviceMatrix,
+                     const CPDF_PageObject* pStopObj,
+                     const CPDF_RenderStatus* pParentStatus,
+                     const CPDF_GraphicStates* pInitialStates,
+                     const CPDF_RenderOptions* pOptions,
+                     int transparency,
+                     FX_BOOL bDropObjects,
+                     CPDF_Dictionary* pFormResource = NULL,
+                     FX_BOOL bStdCS = FALSE,
+                     CPDF_Type3Char* pType3Char = NULL,
+                     FX_ARGB fill_color = 0,
+                     FX_DWORD GroupFamily = 0,
+                     FX_BOOL bLoadMask = FALSE);
+  void RenderObjectList(const CPDF_PageObjectHolder* pObjectHolder,
+                        const CFX_Matrix* pObj2Device);
+  void RenderSingleObject(const CPDF_PageObject* pObj,
+                          const CFX_Matrix* pObj2Device);
+  FX_BOOL ContinueSingleObject(const CPDF_PageObject* pObj,
+                               const CFX_Matrix* pObj2Device,
+                               IFX_Pause* pPause);
+  CPDF_RenderContext* GetContext() { return m_pContext; }
+
+  CPDF_RenderOptions m_Options;
+  CPDF_Dictionary* m_pFormResource;
+  CPDF_Dictionary* m_pPageResource;
+  CFX_ArrayTemplate<CPDF_Type3Font*> m_Type3FontCache;
+
+ protected:
+  friend class CPDF_ImageRenderer;
+  friend class CPDF_RenderContext;
+  void ProcessClipPath(CPDF_ClipPath ClipPath, const CFX_Matrix* pObj2Device);
+  void DrawClipPath(CPDF_ClipPath ClipPath, const CFX_Matrix* pObj2Device);
+  FX_BOOL ProcessTransparency(const CPDF_PageObject* PageObj,
+                              const CFX_Matrix* pObj2Device);
+  void ProcessObjectNoClip(const CPDF_PageObject* PageObj,
+                           const CFX_Matrix* pObj2Device);
+  void DrawObjWithBackground(const CPDF_PageObject* pObj,
+                             const CFX_Matrix* pObj2Device);
+  FX_BOOL DrawObjWithBlend(const CPDF_PageObject* pObj,
+                           const CFX_Matrix* pObj2Device);
+  FX_BOOL ProcessPath(const CPDF_PathObject* pPathObj,
+                      const CFX_Matrix* pObj2Device);
+  void ProcessPathPattern(const CPDF_PathObject* pPathObj,
+                          const CFX_Matrix* pObj2Device,
+                          int& filltype,
+                          FX_BOOL& bStroke);
+  void DrawPathWithPattern(const CPDF_PathObject* pPathObj,
+                           const CFX_Matrix* pObj2Device,
+                           CPDF_Color* pColor,
+                           FX_BOOL bStroke);
+  void DrawTilingPattern(CPDF_TilingPattern* pPattern,
+                         const CPDF_PageObject* pPageObj,
+                         const CFX_Matrix* pObj2Device,
+                         FX_BOOL bStroke);
+  void DrawShadingPattern(CPDF_ShadingPattern* pPattern,
+                          const CPDF_PageObject* pPageObj,
+                          const CFX_Matrix* pObj2Device,
+                          FX_BOOL bStroke);
+  FX_BOOL SelectClipPath(const CPDF_PathObject* pPathObj,
+                         const CFX_Matrix* pObj2Device,
+                         FX_BOOL bStroke);
+  FX_BOOL ProcessImage(const CPDF_ImageObject* pImageObj,
+                       const CFX_Matrix* pObj2Device);
+  FX_BOOL OutputBitmapAlpha(CPDF_ImageObject* pImageObj,
+                            const CFX_Matrix* pImage2Device);
+  FX_BOOL OutputImage(CPDF_ImageObject* pImageObj,
+                      const CFX_Matrix* pImage2Device);
+  FX_BOOL OutputDIBSource(const CFX_DIBSource* pOutputBitmap,
+                          FX_ARGB fill_argb,
+                          int bitmap_alpha,
+                          const CFX_Matrix* pImage2Device,
+                          CPDF_ImageCacheEntry* pImageCache,
+                          FX_DWORD flags);
+  void CompositeDIBitmap(CFX_DIBitmap* pDIBitmap,
+                         int left,
+                         int top,
+                         FX_ARGB mask_argb,
+                         int bitmap_alpha,
+                         int blend_mode,
+                         int bIsolated);
+  FX_BOOL ProcessShading(const CPDF_ShadingObject* pShadingObj,
+                         const CFX_Matrix* pObj2Device);
+  void DrawShading(CPDF_ShadingPattern* pPattern,
+                   CFX_Matrix* pMatrix,
+                   FX_RECT& clip_rect,
+                   int alpha,
+                   FX_BOOL bAlphaMode);
+  FX_BOOL ProcessType3Text(const CPDF_TextObject* textobj,
+                           const CFX_Matrix* pObj2Device);
+  FX_BOOL ProcessText(const CPDF_TextObject* textobj,
+                      const CFX_Matrix* pObj2Device,
+                      CFX_PathData* pClippingPath);
+  void DrawTextPathWithPattern(const CPDF_TextObject* textobj,
+                               const CFX_Matrix* pObj2Device,
+                               CPDF_Font* pFont,
+                               FX_FLOAT font_size,
+                               const CFX_Matrix* pTextMatrix,
+                               FX_BOOL bFill,
+                               FX_BOOL bStroke);
+  FX_BOOL ProcessForm(const CPDF_FormObject* pFormObj,
+                      const CFX_Matrix* pObj2Device);
+  CFX_DIBitmap* GetBackdrop(const CPDF_PageObject* pObj,
+                            const FX_RECT& rect,
+                            int& left,
+                            int& top,
+                            FX_BOOL bBackAlphaRequired);
+  CFX_DIBitmap* LoadSMask(CPDF_Dictionary* pSMaskDict,
+                          FX_RECT* pClipRect,
+                          const CFX_Matrix* pMatrix);
+  void Init(CPDF_RenderContext* pParent);
+  static class CPDF_Type3Cache* GetCachedType3(CPDF_Type3Font* pFont);
+  static CPDF_GraphicStates* CloneObjStates(const CPDF_GraphicStates* pPathObj,
+                                            FX_BOOL bStroke);
+  CPDF_TransferFunc* GetTransferFunc(CPDF_Object* pObject) const;
+  FX_ARGB GetFillArgb(const CPDF_PageObject* pObj,
+                      FX_BOOL bType3 = FALSE) const;
+  FX_ARGB GetStrokeArgb(const CPDF_PageObject* pObj) const;
+  CPDF_RenderContext* m_pContext;
+  FX_BOOL m_bStopped;
+  void DitherObjectArea(const CPDF_PageObject* pObj,
+                        const CFX_Matrix* pObj2Device);
+  FX_BOOL GetObjectClippedRect(const CPDF_PageObject* pObj,
+                               const CFX_Matrix* pObj2Device,
+                               FX_BOOL bLogical,
+                               FX_RECT& rect) const;
+  void GetScaledMatrix(CFX_Matrix& matrix) const;
+
+ protected:
+  static const int kRenderMaxRecursionDepth = 64;
+  static int s_CurrentRecursionDepth;
+
+  CFX_RenderDevice* m_pDevice;
+  CFX_Matrix m_DeviceMatrix;
+  CPDF_ClipPath m_LastClipPath;
+  const CPDF_PageObject* m_pCurObj;
+  const CPDF_PageObject* m_pStopObj;
+  CPDF_GraphicStates m_InitialStates;
+  int m_HalftoneLimit;
+  std::unique_ptr<IPDF_ObjectRenderer> m_pObjectRenderer;
+  FX_BOOL m_bPrint;
+  int m_Transparency;
+  int m_DitherBits;
+  FX_BOOL m_bDropObjects;
+  FX_BOOL m_bStdCS;
+  FX_DWORD m_GroupFamily;
+  FX_BOOL m_bLoadMask;
+  CPDF_Type3Char* m_pType3Char;
+  FX_ARGB m_T3FillColor;
+  int m_curBlend;
+};
+class CPDF_ImageLoader {
+ public:
+  CPDF_ImageLoader()
+      : m_pBitmap(nullptr),
+        m_pMask(nullptr),
+        m_MatteColor(0),
+        m_bCached(FALSE),
+        m_nDownsampleWidth(0),
+        m_nDownsampleHeight(0) {}
+  ~CPDF_ImageLoader();
+
+  FX_BOOL Start(const CPDF_ImageObject* pImage,
+                CPDF_PageRenderCache* pCache,
+                CPDF_ImageLoaderHandle*& LoadHandle,
+                FX_BOOL bStdCS = FALSE,
+                FX_DWORD GroupFamily = 0,
+                FX_BOOL bLoadMask = FALSE,
+                CPDF_RenderStatus* pRenderStatus = NULL,
+                int32_t nDownsampleWidth = 0,
+                int32_t nDownsampleHeight = 0);
+  FX_BOOL Continue(CPDF_ImageLoaderHandle* LoadHandle, IFX_Pause* pPause);
+
+  CFX_DIBSource* m_pBitmap;
+  CFX_DIBSource* m_pMask;
+  FX_DWORD m_MatteColor;
+  FX_BOOL m_bCached;
+
+ protected:
+  int32_t m_nDownsampleWidth;
+  int32_t m_nDownsampleHeight;
+};
+class CPDF_ImageLoaderHandle {
+ public:
+  CPDF_ImageLoaderHandle();
+  ~CPDF_ImageLoaderHandle();
+
+  FX_BOOL Start(CPDF_ImageLoader* pImageLoader,
+                const CPDF_ImageObject* pImage,
+                CPDF_PageRenderCache* pCache,
+                FX_BOOL bStdCS = FALSE,
+                FX_DWORD GroupFamily = 0,
+                FX_BOOL bLoadMask = FALSE,
+                CPDF_RenderStatus* pRenderStatus = NULL,
+                int32_t nDownsampleWidth = 0,
+                int32_t nDownsampleHeight = 0);
+  FX_BOOL Continue(IFX_Pause* pPause);
+
+ protected:
+  CPDF_ImageLoader* m_pImageLoader;
+  CPDF_PageRenderCache* m_pCache;
+  CPDF_ImageObject* m_pImage;
+  int32_t m_nDownsampleWidth;
+  int32_t m_nDownsampleHeight;
+};
+
+class CPDF_ImageRenderer : public IPDF_ObjectRenderer {
+ public:
+  CPDF_ImageRenderer();
+  ~CPDF_ImageRenderer() override;
+
+  // IPDF_ObjectRenderer
+  FX_BOOL Start(CPDF_RenderStatus* pStatus,
+                const CPDF_PageObject* pObj,
+                const CFX_Matrix* pObj2Device,
+                FX_BOOL bStdCS,
+                int blendType = FXDIB_BLEND_NORMAL) override;
+  FX_BOOL Continue(IFX_Pause* pPause) override;
+
+  FX_BOOL Start(CPDF_RenderStatus* pStatus,
+                const CFX_DIBSource* pDIBSource,
+                FX_ARGB bitmap_argb,
+                int bitmap_alpha,
+                const CFX_Matrix* pImage2Device,
+                FX_DWORD flags,
+                FX_BOOL bStdCS,
+                int blendType = FXDIB_BLEND_NORMAL);
+
+ protected:
+  CPDF_RenderStatus* m_pRenderStatus;
+  const CPDF_ImageObject* m_pImageObject;
+  int m_Status;
+  const CFX_Matrix* m_pObj2Device;
+  CFX_Matrix m_ImageMatrix;
+  CPDF_ImageLoader m_Loader;
+  const CFX_DIBSource* m_pDIBSource;
+  CFX_DIBitmap* m_pClone;
+  int m_BitmapAlpha;
+  FX_BOOL m_bPatternColor;
+  CPDF_Pattern* m_pPattern;
+  FX_ARGB m_FillArgb;
+  FX_DWORD m_Flags;
+  CFX_ImageTransformer* m_pTransformer;
+  void* m_DeviceHandle;
+  CPDF_ImageLoaderHandle* m_LoadHandle;
+  FX_BOOL m_bStdCS;
+  int m_BlendType;
+  FX_BOOL StartBitmapAlpha();
+  FX_BOOL StartDIBSource();
+  FX_BOOL StartRenderDIBSource();
+  FX_BOOL StartLoadDIBSource();
+  FX_BOOL DrawMaskedImage();
+  FX_BOOL DrawPatternImage(const CFX_Matrix* pObj2Device);
+};
+
+class CPDF_ScaledRenderBuffer {
+ public:
+  CPDF_ScaledRenderBuffer();
+  ~CPDF_ScaledRenderBuffer();
+
+  FX_BOOL Initialize(CPDF_RenderContext* pContext,
+                     CFX_RenderDevice* pDevice,
+                     const FX_RECT& pRect,
+                     const CPDF_PageObject* pObj,
+                     const CPDF_RenderOptions* pOptions = NULL,
+                     int max_dpi = 0);
+  CFX_RenderDevice* GetDevice() {
+    return m_pBitmapDevice ? m_pBitmapDevice.get() : m_pDevice;
+  }
+  CFX_Matrix* GetMatrix() { return &m_Matrix; }
+  void OutputToDevice();
+
+ private:
+  CFX_RenderDevice* m_pDevice;
+  CPDF_RenderContext* m_pContext;
+  FX_RECT m_Rect;
+  const CPDF_PageObject* m_pObject;
+  std::unique_ptr<CFX_FxgeDevice> m_pBitmapDevice;
+  CFX_Matrix m_Matrix;
+};
+
+class CPDF_DeviceBuffer {
+ public:
+  CPDF_DeviceBuffer();
+  ~CPDF_DeviceBuffer();
+  FX_BOOL Initialize(CPDF_RenderContext* pContext,
+                     CFX_RenderDevice* pDevice,
+                     FX_RECT* pRect,
+                     const CPDF_PageObject* pObj,
+                     int max_dpi = 0);
+  void OutputToDevice();
+  CFX_DIBitmap* GetBitmap() const { return m_pBitmap.get(); }
+  const CFX_Matrix* GetMatrix() const { return &m_Matrix; }
+
+ private:
+  CFX_RenderDevice* m_pDevice;
+  CPDF_RenderContext* m_pContext;
+  FX_RECT m_Rect;
+  const CPDF_PageObject* m_pObject;
+  std::unique_ptr<CFX_DIBitmap> m_pBitmap;
+  CFX_Matrix m_Matrix;
+};
+
+class CPDF_ImageCacheEntry {
+ public:
+  CPDF_ImageCacheEntry(CPDF_Document* pDoc, CPDF_Stream* pStream);
+  ~CPDF_ImageCacheEntry();
+  void ClearImageData();
+  void Reset(const CFX_DIBitmap* pBitmap);
+  FX_BOOL GetCachedBitmap(CFX_DIBSource*& pBitmap,
+                          CFX_DIBSource*& pMask,
+                          FX_DWORD& MatteColor,
+                          CPDF_Dictionary* pPageResources,
+                          FX_BOOL bStdCS = FALSE,
+                          FX_DWORD GroupFamily = 0,
+                          FX_BOOL bLoadMask = FALSE,
+                          CPDF_RenderStatus* pRenderStatus = NULL,
+                          int32_t downsampleWidth = 0,
+                          int32_t downsampleHeight = 0);
+  FX_DWORD EstimateSize() const { return m_dwCacheSize; }
+  FX_DWORD GetTimeCount() const { return m_dwTimeCount; }
+  CPDF_Stream* GetStream() const { return m_pStream; }
+  void SetTimeCount(FX_DWORD dwTimeCount) { m_dwTimeCount = dwTimeCount; }
+  int m_dwTimeCount;
+
+ public:
+  int StartGetCachedBitmap(CPDF_Dictionary* pFormResources,
+                           CPDF_Dictionary* pPageResources,
+                           FX_BOOL bStdCS = FALSE,
+                           FX_DWORD GroupFamily = 0,
+                           FX_BOOL bLoadMask = FALSE,
+                           CPDF_RenderStatus* pRenderStatus = NULL,
+                           int32_t downsampleWidth = 0,
+                           int32_t downsampleHeight = 0);
+  int Continue(IFX_Pause* pPause);
+  CFX_DIBSource* DetachBitmap();
+  CFX_DIBSource* DetachMask();
+  CFX_DIBSource* m_pCurBitmap;
+  CFX_DIBSource* m_pCurMask;
+  FX_DWORD m_MatteColor;
+  CPDF_RenderStatus* m_pRenderStatus;
+
+ protected:
+  void ContinueGetCachedBitmap();
+
+  CPDF_Document* m_pDocument;
+  CPDF_Stream* m_pStream;
+  CFX_DIBSource* m_pCachedBitmap;
+  CFX_DIBSource* m_pCachedMask;
+  FX_DWORD m_dwCacheSize;
+  void CalcSize();
+};
+typedef struct {
+  FX_FLOAT m_DecodeMin;
+  FX_FLOAT m_DecodeStep;
+  int m_ColorKeyMin;
+  int m_ColorKeyMax;
+} DIB_COMP_DATA;
+
+class CPDF_DIBSource : public CFX_DIBSource {
+ public:
+  CPDF_DIBSource();
+  ~CPDF_DIBSource() override;
+
+  FX_BOOL Load(CPDF_Document* pDoc,
+               const CPDF_Stream* pStream,
+               CPDF_DIBSource** ppMask,
+               FX_DWORD* pMatteColor,
+               CPDF_Dictionary* pFormResources,
+               CPDF_Dictionary* pPageResources,
+               FX_BOOL bStdCS = FALSE,
+               FX_DWORD GroupFamily = 0,
+               FX_BOOL bLoadMask = FALSE);
+
+  // CFX_DIBSource
+  FX_BOOL SkipToScanline(int line, IFX_Pause* pPause) const override;
+  uint8_t* GetBuffer() const override;
+  const uint8_t* GetScanline(int line) const override;
+  void DownSampleScanline(int line,
+                          uint8_t* dest_scan,
+                          int dest_bpp,
+                          int dest_width,
+                          FX_BOOL bFlipX,
+                          int clip_left,
+                          int clip_width) const override;
+  void SetDownSampleSize(int dest_width, int dest_height) override;
+
+  CFX_DIBitmap* GetBitmap() const;
+  void ReleaseBitmap(CFX_DIBitmap* pBitmap) const;
+  void ClearImageData();
+  FX_DWORD GetMatteColor() const { return m_MatteColor; }
+
+  int StartLoadDIBSource(CPDF_Document* pDoc,
+                         const CPDF_Stream* pStream,
+                         FX_BOOL bHasMask,
+                         CPDF_Dictionary* pFormResources,
+                         CPDF_Dictionary* pPageResources,
+                         FX_BOOL bStdCS = FALSE,
+                         FX_DWORD GroupFamily = 0,
+                         FX_BOOL bLoadMask = FALSE);
+  int ContinueLoadDIBSource(IFX_Pause* pPause);
+  int StratLoadMask();
+  int StartLoadMaskDIB();
+  int ContinueLoadMaskDIB(IFX_Pause* pPause);
+  int ContinueToLoadMask();
+  CPDF_DIBSource* DetachMask();
+
+ private:
+  bool LoadColorInfo(const CPDF_Dictionary* pFormResources,
+                     const CPDF_Dictionary* pPageResources);
+  DIB_COMP_DATA* GetDecodeAndMaskArray(FX_BOOL& bDefaultDecode,
+                                       FX_BOOL& bColorKey);
+  CPDF_DIBSource* LoadMask(FX_DWORD& MatteColor);
+  CPDF_DIBSource* LoadMaskDIB(CPDF_Stream* pMask);
+  void LoadJpxBitmap();
+  void LoadPalette();
+  int CreateDecoder();
+  void TranslateScanline24bpp(uint8_t* dest_scan,
+                              const uint8_t* src_scan) const;
+  void ValidateDictParam();
+  void DownSampleScanline1Bit(int orig_Bpp,
+                              int dest_Bpp,
+                              FX_DWORD src_width,
+                              const uint8_t* pSrcLine,
+                              uint8_t* dest_scan,
+                              int dest_width,
+                              FX_BOOL bFlipX,
+                              int clip_left,
+                              int clip_width) const;
+  void DownSampleScanline8Bit(int orig_Bpp,
+                              int dest_Bpp,
+                              FX_DWORD src_width,
+                              const uint8_t* pSrcLine,
+                              uint8_t* dest_scan,
+                              int dest_width,
+                              FX_BOOL bFlipX,
+                              int clip_left,
+                              int clip_width) const;
+  void DownSampleScanline32Bit(int orig_Bpp,
+                               int dest_Bpp,
+                               FX_DWORD src_width,
+                               const uint8_t* pSrcLine,
+                               uint8_t* dest_scan,
+                               int dest_width,
+                               FX_BOOL bFlipX,
+                               int clip_left,
+                               int clip_width) const;
+  FX_BOOL TransMask() const;
+
+  CPDF_Document* m_pDocument;
+  const CPDF_Stream* m_pStream;
+  std::unique_ptr<CPDF_StreamAcc> m_pStreamAcc;
+  const CPDF_Dictionary* m_pDict;
+  CPDF_ColorSpace* m_pColorSpace;
+  FX_DWORD m_Family;
+  FX_DWORD m_bpc;
+  FX_DWORD m_bpc_orig;
+  FX_DWORD m_nComponents;
+  FX_DWORD m_GroupFamily;
+  FX_DWORD m_MatteColor;
+  FX_BOOL m_bLoadMask;
+  FX_BOOL m_bDefaultDecode;
+  FX_BOOL m_bImageMask;
+  FX_BOOL m_bDoBpcCheck;
+  FX_BOOL m_bColorKey;
+  FX_BOOL m_bHasMask;
+  FX_BOOL m_bStdCS;
+  DIB_COMP_DATA* m_pCompData;
+  uint8_t* m_pLineBuf;
+  uint8_t* m_pMaskedLine;
+  std::unique_ptr<CFX_DIBitmap> m_pCachedBitmap;
+  std::unique_ptr<ICodec_ScanlineDecoder> m_pDecoder;
+  void* m_pJbig2Context;
+  CPDF_DIBSource* m_pMask;
+  std::unique_ptr<CPDF_StreamAcc> m_pGlobalStream;
+  CPDF_Stream* m_pMaskStream;
+  int m_Status;
+};
+
+#define FPDF_HUGE_IMAGE_SIZE 60000000
+class CPDF_DIBTransferFunc : public CFX_FilteredDIB {
+ public:
+  CPDF_DIBTransferFunc(const CPDF_TransferFunc* pTransferFunc);
+  ~CPDF_DIBTransferFunc() override;
+
+  // CFX_FilteredDIB
+  FXDIB_Format GetDestFormat() override;
+  FX_ARGB* GetDestPalette() override { return NULL; }
+  void TranslateScanline(uint8_t* dest_buf,
+                         const uint8_t* src_buf) const override;
+  void TranslateDownSamples(uint8_t* dest_buf,
+                            const uint8_t* src_buf,
+                            int pixels,
+                            int Bpp) const override;
+
+  const uint8_t* m_RampR;
+  const uint8_t* m_RampG;
+  const uint8_t* m_RampB;
+};
+
+struct _CPDF_UniqueKeyGen {
+  void Generate(int count, ...);
+  FX_CHAR m_Key[128];
+  int m_KeyLen;
+};
+
+#endif  // CORE_FPDFAPI_FPDF_RENDER_RENDER_INT_H_