1 // Copyright 2016 The PDFium Authors
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_textobject.h"
12
13 CPDF_ClipPath::CPDF_ClipPath() = default;
14
15 CPDF_ClipPath::CPDF_ClipPath(const CPDF_ClipPath& that) = default;
16
17 CPDF_ClipPath& CPDF_ClipPath::operator=(const CPDF_ClipPath& that) = default;
18
19 CPDF_ClipPath::~CPDF_ClipPath() = default;
20
GetPathCount() const21 size_t CPDF_ClipPath::GetPathCount() const {
22 return m_Ref.GetObject()->m_PathAndTypeList.size();
23 }
24
GetPath(size_t i) const25 CPDF_Path CPDF_ClipPath::GetPath(size_t i) const {
26 return m_Ref.GetObject()->m_PathAndTypeList[i].first;
27 }
28
GetClipType(size_t i) const29 CFX_FillRenderOptions::FillType CPDF_ClipPath::GetClipType(size_t i) const {
30 return m_Ref.GetObject()->m_PathAndTypeList[i].second;
31 }
32
GetTextCount() const33 size_t CPDF_ClipPath::GetTextCount() const {
34 return m_Ref.GetObject()->m_TextList.size();
35 }
36
GetText(size_t i) const37 CPDF_TextObject* CPDF_ClipPath::GetText(size_t i) const {
38 return m_Ref.GetObject()->m_TextList[i].get();
39 }
40
GetClipBox() const41 CFX_FloatRect CPDF_ClipPath::GetClipBox() const {
42 CFX_FloatRect rect;
43 bool bStarted = false;
44 if (GetPathCount() > 0) {
45 rect = GetPath(0).GetBoundingBox();
46 for (size_t i = 1; i < GetPathCount(); ++i) {
47 CFX_FloatRect path_rect = GetPath(i).GetBoundingBox();
48 rect.Intersect(path_rect);
49 }
50 bStarted = true;
51 }
52
53 CFX_FloatRect layer_rect;
54 bool bLayerStarted = false;
55 for (size_t i = 0; i < GetTextCount(); ++i) {
56 CPDF_TextObject* pTextObj = GetText(i);
57 if (pTextObj) {
58 if (bLayerStarted) {
59 layer_rect.Union(CFX_FloatRect(pTextObj->GetBBox()));
60 } else {
61 layer_rect = CFX_FloatRect(pTextObj->GetBBox());
62 bLayerStarted = true;
63 }
64 } else {
65 if (bStarted) {
66 rect.Intersect(layer_rect);
67 } else {
68 rect = layer_rect;
69 bStarted = true;
70 }
71 bLayerStarted = false;
72 }
73 }
74 return rect;
75 }
76
AppendPath(CPDF_Path path,CFX_FillRenderOptions::FillType type)77 void CPDF_ClipPath::AppendPath(CPDF_Path path,
78 CFX_FillRenderOptions::FillType type) {
79 PathData* pData = m_Ref.GetPrivateCopy();
80 pData->m_PathAndTypeList.emplace_back(path, type);
81 }
82
AppendPathWithAutoMerge(CPDF_Path path,CFX_FillRenderOptions::FillType type)83 void CPDF_ClipPath::AppendPathWithAutoMerge(
84 CPDF_Path path,
85 CFX_FillRenderOptions::FillType type) {
86 PathData* pData = m_Ref.GetPrivateCopy();
87 if (!pData->m_PathAndTypeList.empty()) {
88 const CPDF_Path& old_path = pData->m_PathAndTypeList.back().first;
89 if (old_path.IsRect()) {
90 CFX_PointF point0 = old_path.GetPoint(0);
91 CFX_PointF point2 = old_path.GetPoint(2);
92 CFX_FloatRect old_rect(point0.x, point0.y, point2.x, point2.y);
93 CFX_FloatRect new_rect = path.GetBoundingBox();
94 if (old_rect.Contains(new_rect))
95 pData->m_PathAndTypeList.pop_back();
96 }
97 }
98 AppendPath(path, type);
99 }
100
AppendTexts(std::vector<std::unique_ptr<CPDF_TextObject>> * pTexts)101 void CPDF_ClipPath::AppendTexts(
102 std::vector<std::unique_ptr<CPDF_TextObject>>* pTexts) {
103 constexpr size_t kMaxTextObjects = 1024;
104 PathData* pData = m_Ref.GetPrivateCopy();
105 if (pData->m_TextList.size() + pTexts->size() <= kMaxTextObjects) {
106 for (size_t i = 0; i < pTexts->size(); i++)
107 pData->m_TextList.push_back(std::move((*pTexts)[i]));
108 pData->m_TextList.push_back(nullptr);
109 }
110 pTexts->clear();
111 }
112
CopyClipPath(const CPDF_ClipPath & that)113 void CPDF_ClipPath::CopyClipPath(const CPDF_ClipPath& that) {
114 if (*this == that || !that.HasRef())
115 return;
116
117 for (size_t i = 0; i < that.GetPathCount(); ++i)
118 AppendPath(that.GetPath(i), that.GetClipType(i));
119 }
120
Transform(const CFX_Matrix & matrix)121 void CPDF_ClipPath::Transform(const CFX_Matrix& matrix) {
122 PathData* pData = m_Ref.GetPrivateCopy();
123 for (auto& obj : pData->m_PathAndTypeList)
124 obj.first.Transform(matrix);
125
126 for (auto& text : pData->m_TextList) {
127 if (text)
128 text->Transform(matrix);
129 }
130 }
131
132 CPDF_ClipPath::PathData::PathData() = default;
133
PathData(const PathData & that)134 CPDF_ClipPath::PathData::PathData(const PathData& that)
135 : m_PathAndTypeList(that.m_PathAndTypeList),
136 m_TextList(that.m_TextList.size()) {
137 for (size_t i = 0; i < that.m_TextList.size(); ++i) {
138 if (that.m_TextList[i])
139 m_TextList[i] = that.m_TextList[i]->Clone();
140 }
141 }
142
143 CPDF_ClipPath::PathData::~PathData() = default;
144
Clone() const145 RetainPtr<CPDF_ClipPath::PathData> CPDF_ClipPath::PathData::Clone() const {
146 return pdfium::MakeRetain<CPDF_ClipPath::PathData>(*this);
147 }
148