1 files changed, 143 insertions, 0 deletions
diff --git a/core/fxge/dib/cfx_imagerenderer.cpp b/core/fxge/dib/cfx_imagerenderer.cpp
new file mode 100644
index 0000000000..9eea474352
--- /dev/null
+++ b/core/fxge/dib/cfx_imagerenderer.cpp
@@ -0,0 +1,143 @@
+// Copyright 2017 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/fxge/dib/cfx_imagerenderer.h"
+
+#include <memory>
+
+#include "core/fxge/dib/cfx_imagetransformer.h"
+#include "core/fxge/dib/dib_int.h"
+#include "core/fxge/ge/cfx_cliprgn.h"
+#include "third_party/base/ptr_util.h"
+
+CFX_ImageRenderer::CFX_ImageRenderer()
+    : m_Status(0),
+      m_pIccTransform(nullptr),
+      m_bRgbByteOrder(false),
+      m_BlendType(FXDIB_BLEND_NORMAL) {}
+
+CFX_ImageRenderer::~CFX_ImageRenderer() {}
+
+bool CFX_ImageRenderer::Start(const CFX_RetainPtr<CFX_DIBitmap>& pDevice,
+                              const CFX_ClipRgn* pClipRgn,
+                              const CFX_RetainPtr<CFX_DIBSource>& pSource,
+                              int bitmap_alpha,
+                              uint32_t mask_color,
+                              const CFX_Matrix* pMatrix,
+                              uint32_t dib_flags,
+                              bool bRgbByteOrder,
+                              int alpha_flag,
+                              void* pIccTransform,
+                              int blend_type) {
+  m_Matrix = *pMatrix;
+  CFX_FloatRect image_rect_f = m_Matrix.GetUnitRect();
+  FX_RECT image_rect = image_rect_f.GetOuterRect();
+  m_ClipBox = pClipRgn ? pClipRgn->GetBox() : FX_RECT(0, 0, pDevice->GetWidth(),
+                                                      pDevice->GetHeight());
+  m_ClipBox.Intersect(image_rect);
+  if (m_ClipBox.IsEmpty())
+    return false;
+
+  m_pDevice = pDevice;
+  m_pClipRgn = pClipRgn;
+  m_MaskColor = mask_color;
+  m_BitmapAlpha = bitmap_alpha;
+  m_Matrix = *pMatrix;
+  m_Flags = dib_flags;
+  m_AlphaFlag = alpha_flag;
+  m_pIccTransform = pIccTransform;
+  m_bRgbByteOrder = bRgbByteOrder;
+  m_BlendType = blend_type;
+
+  if ((FXSYS_fabs(m_Matrix.b) >= 0.5f || m_Matrix.a == 0) ||
+      (FXSYS_fabs(m_Matrix.c) >= 0.5f || m_Matrix.d == 0)) {
+    if (FXSYS_fabs(m_Matrix.a) < FXSYS_fabs(m_Matrix.b) / 20 &&
+        FXSYS_fabs(m_Matrix.d) < FXSYS_fabs(m_Matrix.c) / 20 &&
+        FXSYS_fabs(m_Matrix.a) < 0.5f && FXSYS_fabs(m_Matrix.d) < 0.5f) {
+      int dest_width = image_rect.Width();
+      int dest_height = image_rect.Height();
+      FX_RECT bitmap_clip = m_ClipBox;
+      bitmap_clip.Offset(-image_rect.left, -image_rect.top);
+      bitmap_clip = FXDIB_SwapClipBox(bitmap_clip, dest_width, dest_height,
+                                      m_Matrix.c > 0, m_Matrix.b < 0);
+      m_Composer.Compose(pDevice, pClipRgn, bitmap_alpha, mask_color, m_ClipBox,
+                         true, m_Matrix.c > 0, m_Matrix.b < 0, m_bRgbByteOrder,
+                         alpha_flag, pIccTransform, m_BlendType);
+      m_Stretcher = pdfium::MakeUnique<CFX_ImageStretcher>(
+          &m_Composer, pSource, dest_height, dest_width, bitmap_clip,
+          dib_flags);
+      if (!m_Stretcher->Start())
+        return false;
+
+      m_Status = 1;
+      return true;
+    }
+    m_Status = 2;
+    m_pTransformer = pdfium::MakeUnique<CFX_ImageTransformer>(
+        pSource, &m_Matrix, dib_flags, &m_ClipBox);
+    m_pTransformer->Start();
+    return true;
+  }
+
+  int dest_width = image_rect.Width();
+  if (m_Matrix.a < 0)
+    dest_width = -dest_width;
+
+  int dest_height = image_rect.Height();
+  if (m_Matrix.d > 0)
+    dest_height = -dest_height;
+
+  if (dest_width == 0 || dest_height == 0)
+    return false;
+
+  FX_RECT bitmap_clip = m_ClipBox;
+  bitmap_clip.Offset(-image_rect.left, -image_rect.top);
+  m_Composer.Compose(pDevice, pClipRgn, bitmap_alpha, mask_color, m_ClipBox,
+                     false, false, false, m_bRgbByteOrder, alpha_flag,
+                     pIccTransform, m_BlendType);
+  m_Status = 1;
+  m_Stretcher = pdfium::MakeUnique<CFX_ImageStretcher>(
+      &m_Composer, pSource, dest_width, dest_height, bitmap_clip, dib_flags);
+  return m_Stretcher->Start();
+}
+
+bool CFX_ImageRenderer::Continue(IFX_Pause* pPause) {
+  if (m_Status == 1)
+    return m_Stretcher->Continue(pPause);
+
+  if (m_Status != 2)
+    return false;
+
+  if (m_pTransformer->Continue(pPause))
+    return true;
+
+  CFX_RetainPtr<CFX_DIBitmap> pBitmap = m_pTransformer->DetachBitmap();
+  if (!pBitmap || !pBitmap->GetBuffer())
+    return false;
+
+  if (pBitmap->IsAlphaMask()) {
+    if (m_BitmapAlpha != 255) {
+      if (m_AlphaFlag >> 8) {
+        m_AlphaFlag = (((uint8_t)((m_AlphaFlag & 0xff) * m_BitmapAlpha / 255)) |
+                       ((m_AlphaFlag >> 8) << 8));
+      } else {
+        m_MaskColor = FXARGB_MUL_ALPHA(m_MaskColor, m_BitmapAlpha);
+      }
+    }
+    m_pDevice->CompositeMask(
+        m_pTransformer->result().left, m_pTransformer->result().top,
+        pBitmap->GetWidth(), pBitmap->GetHeight(), pBitmap, m_MaskColor, 0, 0,
+        m_BlendType, m_pClipRgn, m_bRgbByteOrder, m_AlphaFlag, m_pIccTransform);
+  } else {
+    if (m_BitmapAlpha != 255)
+      pBitmap->MultiplyAlpha(m_BitmapAlpha);
+    m_pDevice->CompositeBitmap(
+        m_pTransformer->result().left, m_pTransformer->result().top,
+        pBitmap->GetWidth(), pBitmap->GetHeight(), pBitmap, 0, 0, m_BlendType,
+        m_pClipRgn, m_bRgbByteOrder, m_pIccTransform);
+  }
+  return false;
+}