1 files changed, 128 insertions, 0 deletions
diff --git a/xfa/fde/cfde_rendercontext.cpp b/xfa/fde/cfde_rendercontext.cpp
new file mode 100644
index 0000000000..2e690e0ed9
--- /dev/null
+++ b/xfa/fde/cfde_rendercontext.cpp
@@ -0,0 +1,128 @@
+// 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 "xfa/fde/cfde_rendercontext.h"
+
+#include "third_party/base/ptr_util.h"
+#include "xfa/fde/cfde_brush.h"
+#include "xfa/fde/cfde_renderdevice.h"
+#include "xfa/fde/cfde_txtedttextset.h"
+
+#define FDE_PATHRENDER_Stroke 1
+#define FDE_PATHRENDER_Fill 2
+
+CFDE_RenderContext::CFDE_RenderContext()
+    : m_eStatus(FDE_RENDERSTATUS_Reset),
+      m_pRenderDevice(nullptr),
+      m_Transform() {
+  m_Transform.SetIdentity();
+}
+
+CFDE_RenderContext::~CFDE_RenderContext() {
+  StopRender();
+}
+
+bool CFDE_RenderContext::StartRender(CFDE_RenderDevice* pRenderDevice,
+                                     CFDE_TxtEdtPage* pCanvasSet,
+                                     const CFX_Matrix& tmDoc2Device) {
+  if (m_pRenderDevice)
+    return false;
+  if (!pRenderDevice)
+    return false;
+  if (!pCanvasSet)
+    return false;
+
+  m_eStatus = FDE_RENDERSTATUS_Paused;
+  m_pRenderDevice = pRenderDevice;
+  m_Transform = tmDoc2Device;
+  if (!m_pIterator)
+    m_pIterator = pdfium::MakeUnique<CFDE_VisualSetIterator>();
+
+  return m_pIterator->AttachCanvas(pCanvasSet) && m_pIterator->FilterObjects();
+}
+
+FDE_RENDERSTATUS CFDE_RenderContext::DoRender(IFX_Pause* pPause) {
+  if (!m_pRenderDevice)
+    return FDE_RENDERSTATUS_Failed;
+  if (!m_pIterator)
+    return FDE_RENDERSTATUS_Failed;
+
+  FDE_RENDERSTATUS eStatus = FDE_RENDERSTATUS_Paused;
+  CFX_Matrix rm;
+  rm.SetReverse(m_Transform);
+  CFX_RectF rtDocClip = m_pRenderDevice->GetClipRect();
+  if (rtDocClip.IsEmpty()) {
+    rtDocClip.left = rtDocClip.top = 0;
+    rtDocClip.width = (float)m_pRenderDevice->GetWidth();
+    rtDocClip.height = (float)m_pRenderDevice->GetHeight();
+  }
+  rm.TransformRect(rtDocClip);
+  IFDE_VisualSet* pVisualSet;
+  FDE_TEXTEDITPIECE* pPiece;
+  int32_t iCount = 0;
+  while (true) {
+    pPiece = m_pIterator->GetNext(pVisualSet);
+    if (!pPiece || !pVisualSet) {
+      eStatus = FDE_RENDERSTATUS_Done;
+      break;
+    }
+    if (!rtDocClip.IntersectWith(pVisualSet->GetRect(*pPiece)))
+      continue;
+
+    switch (pVisualSet->GetType()) {
+      case FDE_VISUALOBJ_Text:
+        RenderText(static_cast<CFDE_TxtEdtTextSet*>(pVisualSet), pPiece);
+        iCount += 5;
+        break;
+      case FDE_VISUALOBJ_Canvas:
+        ASSERT(false);
+        break;
+      default:
+        break;
+    }
+    if (iCount >= 100 && pPause && pPause->NeedToPauseNow()) {
+      eStatus = FDE_RENDERSTATUS_Paused;
+      break;
+    }
+  }
+  return m_eStatus = eStatus;
+}
+
+void CFDE_RenderContext::StopRender() {
+  m_eStatus = FDE_RENDERSTATUS_Reset;
+  m_pRenderDevice = nullptr;
+  m_Transform.SetIdentity();
+  m_pIterator.reset();
+  m_pBrush.reset();
+  m_CharPos.clear();
+}
+
+void CFDE_RenderContext::RenderText(CFDE_TxtEdtTextSet* pTextSet,
+                                    FDE_TEXTEDITPIECE* pText) {
+  ASSERT(m_pRenderDevice);
+  ASSERT(pTextSet && pText);
+
+  CFX_RetainPtr<CFGAS_GEFont> pFont = pTextSet->GetFont();
+  if (!pFont)
+    return;
+
+  int32_t iCount = pTextSet->GetDisplayPos(*pText, nullptr, false);
+  if (iCount < 1)
+    return;
+
+  if (!m_pBrush)
+    m_pBrush = pdfium::MakeUnique<CFDE_Brush>();
+
+  if (m_CharPos.size() < static_cast<size_t>(iCount))
+    m_CharPos.resize(iCount, FXTEXT_CHARPOS());
+
+  iCount = pTextSet->GetDisplayPos(*pText, m_CharPos.data(), false);
+  float fFontSize = pTextSet->GetFontSize();
+  FX_ARGB dwColor = pTextSet->GetFontColor();
+  m_pBrush->SetColor(dwColor);
+  m_pRenderDevice->DrawString(m_pBrush.get(), pFont, m_CharPos.data(), iCount,
+                              fFontSize, &m_Transform);
+}