1 files changed, 176 insertions, 0 deletions
diff --git a/core/fpdfapi/page/cpdf_page.cpp b/core/fpdfapi/page/cpdf_page.cpp
new file mode 100644
index 0000000000..f471760c91
--- /dev/null
+++ b/core/fpdfapi/page/cpdf_page.cpp
@@ -0,0 +1,176 @@
+// Copyright 2016 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/page/cpdf_page.h"
+
+#include <set>
+
+#include "core/fpdfapi/cpdf_pagerendercontext.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_array.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h"
+#include "core/fpdfapi/fpdf_parser/cpdf_object.h"
+#include "core/fpdfapi/fpdf_render/cpdf_pagerendercache.h"
+#include "core/fpdfapi/page/cpdf_pageobject.h"
+#include "core/fpdfapi/page/pageint.h"
+#include "third_party/base/stl_util.h"
+
+CPDF_Page::CPDF_Page(CPDF_Document* pDocument,
+                     CPDF_Dictionary* pPageDict,
+                     bool bPageCache)
+    : m_PageWidth(100),
+      m_PageHeight(100),
+      m_pView(nullptr),
+      m_pPageRender(bPageCache ? new CPDF_PageRenderCache(this) : nullptr) {
+  m_pFormDict = pPageDict;
+  m_pDocument = pDocument;
+  if (!pPageDict)
+    return;
+
+  CPDF_Object* pageAttr = GetPageAttr("Resources");
+  m_pResources = pageAttr ? pageAttr->GetDict() : nullptr;
+  m_pPageResources = m_pResources;
+  CPDF_Object* pRotate = GetPageAttr("Rotate");
+  int rotate = pRotate ? pRotate->GetInteger() / 90 % 4 : 0;
+  if (rotate < 0)
+    rotate += 4;
+
+  CPDF_Array* pMediaBox = ToArray(GetPageAttr("MediaBox"));
+  CFX_FloatRect mediabox;
+  if (pMediaBox) {
+    mediabox = pMediaBox->GetRect();
+    mediabox.Normalize();
+  }
+  if (mediabox.IsEmpty())
+    mediabox = CFX_FloatRect(0, 0, 612, 792);
+
+  CPDF_Array* pCropBox = ToArray(GetPageAttr("CropBox"));
+  if (pCropBox) {
+    m_BBox = pCropBox->GetRect();
+    m_BBox.Normalize();
+  }
+  if (m_BBox.IsEmpty())
+    m_BBox = mediabox;
+  else
+    m_BBox.Intersect(mediabox);
+
+  m_PageWidth = m_BBox.right - m_BBox.left;
+  m_PageHeight = m_BBox.top - m_BBox.bottom;
+  if (rotate % 2)
+    std::swap(m_PageWidth, m_PageHeight);
+
+  switch (rotate) {
+    case 0:
+      m_PageMatrix.Set(1.0f, 0, 0, 1.0f, -m_BBox.left, -m_BBox.bottom);
+      break;
+    case 1:
+      m_PageMatrix.Set(0, -1.0f, 1.0f, 0, -m_BBox.bottom, m_BBox.right);
+      break;
+    case 2:
+      m_PageMatrix.Set(-1.0f, 0, 0, -1.0f, m_BBox.right, m_BBox.top);
+      break;
+    case 3:
+      m_PageMatrix.Set(0, 1.0f, -1.0f, 0, m_BBox.top, -m_BBox.left);
+      break;
+  }
+
+  m_Transparency = PDFTRANS_ISOLATED;
+  LoadTransInfo();
+}
+
+CPDF_Page::~CPDF_Page() {}
+
+void CPDF_Page::StartParse() {
+  if (m_ParseState == CONTENT_PARSED || m_ParseState == CONTENT_PARSING)
+    return;
+
+  m_pParser.reset(new CPDF_ContentParser);
+  m_pParser->Start(this);
+  m_ParseState = CONTENT_PARSING;
+}
+
+void CPDF_Page::ParseContent() {
+  StartParse();
+  ContinueParse(nullptr);
+}
+
+void CPDF_Page::SetRenderContext(
+    std::unique_ptr<CPDF_PageRenderContext> pContext) {
+  m_pRenderContext = std::move(pContext);
+}
+
+CPDF_Object* CPDF_Page::GetPageAttr(const CFX_ByteString& name) const {
+  CPDF_Dictionary* pPageDict = m_pFormDict;
+  std::set<CPDF_Dictionary*> visited;
+  while (1) {
+    visited.insert(pPageDict);
+    if (CPDF_Object* pObj = pPageDict->GetDirectObjectFor(name))
+      return pObj;
+
+    pPageDict = pPageDict->GetDictFor("Parent");
+    if (!pPageDict || pdfium::ContainsKey(visited, pPageDict))
+      break;
+  }
+  return nullptr;
+}
+
+void CPDF_Page::GetDisplayMatrix(CFX_Matrix& matrix,
+                                 int xPos,
+                                 int yPos,
+                                 int xSize,
+                                 int ySize,
+                                 int iRotate) const {
+  if (m_PageWidth == 0 || m_PageHeight == 0) {
+    return;
+  }
+  CFX_Matrix display_matrix;
+  int x0 = 0;
+  int y0 = 0;
+  int x1 = 0;
+  int y1 = 0;
+  int x2 = 0;
+  int y2 = 0;
+  iRotate %= 4;
+  switch (iRotate) {
+    case 0:
+      x0 = xPos;
+      y0 = yPos + ySize;
+      x1 = xPos;
+      y1 = yPos;
+      x2 = xPos + xSize;
+      y2 = yPos + ySize;
+      break;
+    case 1:
+      x0 = xPos;
+      y0 = yPos;
+      x1 = xPos + xSize;
+      y1 = yPos;
+      x2 = xPos;
+      y2 = yPos + ySize;
+      break;
+    case 2:
+      x0 = xPos + xSize;
+      y0 = yPos;
+      x1 = xPos + xSize;
+      y1 = yPos + ySize;
+      x2 = xPos;
+      y2 = yPos;
+      break;
+    case 3:
+      x0 = xPos + xSize;
+      y0 = yPos + ySize;
+      x1 = xPos;
+      y1 = yPos + ySize;
+      x2 = xPos + xSize;
+      y2 = yPos;
+      break;
+  }
+  display_matrix.Set(
+      ((FX_FLOAT)(x2 - x0)) / m_PageWidth, ((FX_FLOAT)(y2 - y0)) / m_PageWidth,
+      ((FX_FLOAT)(x1 - x0)) / m_PageHeight,
+      ((FX_FLOAT)(y1 - y0)) / m_PageHeight, (FX_FLOAT)x0, (FX_FLOAT)y0);
+  matrix = m_PageMatrix;
+  matrix.Concat(display_matrix);
+}