1 // Copyright 2016 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #include "core/fpdfapi/page/cpdf_clippath.h" 8 9 #include <utility> 10 11 #include "core/fpdfapi/page/cpdf_path.h" 12 #include "core/fpdfapi/page/cpdf_textobject.h" 13 #include "third_party/base/stl_util.h" 14 15 #define FPDF_CLIPPATH_MAX_TEXTS 1024 16 CPDF_ClipPath()17CPDF_ClipPath::CPDF_ClipPath() {} 18 CPDF_ClipPath(const CPDF_ClipPath & that)19CPDF_ClipPath::CPDF_ClipPath(const CPDF_ClipPath& that) : m_Ref(that.m_Ref) {} 20 ~CPDF_ClipPath()21CPDF_ClipPath::~CPDF_ClipPath() {} 22 GetPathCount() const23uint32_t CPDF_ClipPath::GetPathCount() const { 24 return pdfium::CollectionSize<uint32_t>(m_Ref.GetObject()->m_PathAndTypeList); 25 } 26 GetPath(size_t i) const27CPDF_Path CPDF_ClipPath::GetPath(size_t i) const { 28 return m_Ref.GetObject()->m_PathAndTypeList[i].first; 29 } 30 GetClipType(size_t i) const31uint8_t CPDF_ClipPath::GetClipType(size_t i) const { 32 return m_Ref.GetObject()->m_PathAndTypeList[i].second; 33 } 34 GetTextCount() const35uint32_t CPDF_ClipPath::GetTextCount() const { 36 return pdfium::CollectionSize<uint32_t>(m_Ref.GetObject()->m_TextList); 37 } 38 GetText(size_t i) const39CPDF_TextObject* CPDF_ClipPath::GetText(size_t i) const { 40 return m_Ref.GetObject()->m_TextList[i].get(); 41 } 42 GetClipBox() const43CFX_FloatRect CPDF_ClipPath::GetClipBox() const { 44 CFX_FloatRect rect; 45 bool bStarted = false; 46 int count = GetPathCount(); 47 if (count) { 48 rect = GetPath(0).GetBoundingBox(); 49 for (int i = 1; i < count; i++) { 50 CFX_FloatRect path_rect = GetPath(i).GetBoundingBox(); 51 rect.Intersect(path_rect); 52 } 53 bStarted = true; 54 } 55 count = GetTextCount(); 56 if (count) { 57 CFX_FloatRect layer_rect; 58 bool bLayerStarted = false; 59 for (int i = 0; i < count; i++) { 60 CPDF_TextObject* pTextObj = GetText(i); 61 if (!pTextObj) { 62 if (!bStarted) { 63 rect = layer_rect; 64 bStarted = true; 65 } else { 66 rect.Intersect(layer_rect); 67 } 68 bLayerStarted = false; 69 } else { 70 if (!bLayerStarted) { 71 layer_rect = CFX_FloatRect(pTextObj->GetBBox(nullptr)); 72 bLayerStarted = true; 73 } else { 74 layer_rect.Union(CFX_FloatRect(pTextObj->GetBBox(nullptr))); 75 } 76 } 77 } 78 } 79 return rect; 80 } 81 AppendPath(CPDF_Path path,uint8_t type,bool bAutoMerge)82void CPDF_ClipPath::AppendPath(CPDF_Path path, uint8_t type, bool bAutoMerge) { 83 PathData* pData = m_Ref.GetPrivateCopy(); 84 if (!pData->m_PathAndTypeList.empty() && bAutoMerge) { 85 const CPDF_Path& old_path = pData->m_PathAndTypeList.back().first; 86 if (old_path.IsRect()) { 87 CFX_PointF point0 = old_path.GetPoint(0); 88 CFX_PointF point2 = old_path.GetPoint(2); 89 CFX_FloatRect old_rect(point0.x, point0.y, point2.x, point2.y); 90 CFX_FloatRect new_rect = path.GetBoundingBox(); 91 if (old_rect.Contains(new_rect)) 92 pData->m_PathAndTypeList.pop_back(); 93 } 94 } 95 pData->m_PathAndTypeList.push_back(std::make_pair(path, type)); 96 } 97 AppendTexts(std::vector<std::unique_ptr<CPDF_TextObject>> * pTexts)98void CPDF_ClipPath::AppendTexts( 99 std::vector<std::unique_ptr<CPDF_TextObject>>* pTexts) { 100 PathData* pData = m_Ref.GetPrivateCopy(); 101 if (pData->m_TextList.size() + pTexts->size() <= FPDF_CLIPPATH_MAX_TEXTS) { 102 for (size_t i = 0; i < pTexts->size(); i++) 103 pData->m_TextList.push_back(std::move((*pTexts)[i])); 104 pData->m_TextList.push_back(nullptr); 105 } 106 pTexts->clear(); 107 } 108 Transform(const CFX_Matrix & matrix)109void CPDF_ClipPath::Transform(const CFX_Matrix& matrix) { 110 PathData* pData = m_Ref.GetPrivateCopy(); 111 for (auto& obj : pData->m_PathAndTypeList) 112 obj.first.Transform(&matrix); 113 for (auto& text : pData->m_TextList) { 114 if (text) 115 text->Transform(matrix); 116 } 117 } 118 PathData()119CPDF_ClipPath::PathData::PathData() {} 120 PathData(const PathData & that)121CPDF_ClipPath::PathData::PathData(const PathData& that) { 122 m_PathAndTypeList = that.m_PathAndTypeList; 123 124 m_TextList.resize(that.m_TextList.size()); 125 for (size_t i = 0; i < that.m_TextList.size(); ++i) { 126 if (that.m_TextList[i]) 127 m_TextList[i] = that.m_TextList[i]->Clone(); 128 } 129 } 130 ~PathData()131CPDF_ClipPath::PathData::~PathData() {} 132