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_allstates.h"
8
9 #include <algorithm>
10 #include <utility>
11 #include <vector>
12
13 #include "core/fpdfapi/font/cpdf_font.h"
14 #include "core/fpdfapi/page/cpdf_pageobjectholder.h"
15 #include "core/fpdfapi/page/cpdf_streamcontentparser.h"
16 #include "core/fpdfapi/parser/cpdf_array.h"
17 #include "core/fpdfapi/parser/cpdf_dictionary.h"
18 #include "core/fpdfapi/parser/fpdf_parser_utility.h"
19 #include "core/fxcrt/bytestring.h"
20 #include "core/fxge/cfx_graphstatedata.h"
21
22 CPDF_AllStates::CPDF_AllStates() = default;
23
24 CPDF_AllStates::~CPDF_AllStates() = default;
25
Copy(const CPDF_AllStates & src)26 void CPDF_AllStates::Copy(const CPDF_AllStates& src) {
27 CopyStates(src);
28 m_GraphicsResourceNames = src.m_GraphicsResourceNames;
29 m_TextMatrix = src.m_TextMatrix;
30 m_ParentMatrix = src.m_ParentMatrix;
31 m_CTM = src.m_CTM;
32 m_TextPos = src.m_TextPos;
33 m_TextLinePos = src.m_TextLinePos;
34 m_TextLeading = src.m_TextLeading;
35 m_TextRise = src.m_TextRise;
36 m_TextHorzScale = src.m_TextHorzScale;
37 }
38
SetLineDash(const CPDF_Array * pArray,float phase,float scale)39 void CPDF_AllStates::SetLineDash(const CPDF_Array* pArray,
40 float phase,
41 float scale) {
42 std::vector<float> dashes = ReadArrayElementsToVector(pArray, pArray->size());
43 m_GraphState.SetLineDash(std::move(dashes), phase, scale);
44 }
45
ProcessExtGS(const CPDF_Dictionary * pGS,CPDF_StreamContentParser * pParser)46 void CPDF_AllStates::ProcessExtGS(const CPDF_Dictionary* pGS,
47 CPDF_StreamContentParser* pParser) {
48 CPDF_DictionaryLocker locker(pGS);
49 for (const auto& it : locker) {
50 RetainPtr<CPDF_Object> pObject = it.second->GetMutableDirect();
51 if (!pObject)
52 continue;
53
54 uint32_t key = it.first.GetID();
55 switch (key) {
56 case FXBSTR_ID('L', 'W', 0, 0):
57 m_GraphState.SetLineWidth(pObject->GetNumber());
58 break;
59 case FXBSTR_ID('L', 'C', 0, 0):
60 m_GraphState.SetLineCap(
61 static_cast<CFX_GraphStateData::LineCap>(pObject->GetInteger()));
62 break;
63 case FXBSTR_ID('L', 'J', 0, 0):
64 m_GraphState.SetLineJoin(
65 static_cast<CFX_GraphStateData::LineJoin>(pObject->GetInteger()));
66 break;
67 case FXBSTR_ID('M', 'L', 0, 0):
68 m_GraphState.SetMiterLimit(pObject->GetNumber());
69 break;
70 case FXBSTR_ID('D', 0, 0, 0): {
71 const CPDF_Array* pDash = pObject->AsArray();
72 if (!pDash)
73 break;
74
75 RetainPtr<const CPDF_Array> pArray = pDash->GetArrayAt(0);
76 if (!pArray)
77 break;
78
79 SetLineDash(pArray.Get(), pDash->GetFloatAt(1), 1.0f);
80 break;
81 }
82 case FXBSTR_ID('R', 'I', 0, 0):
83 m_GeneralState.SetRenderIntent(pObject->GetString());
84 break;
85 case FXBSTR_ID('F', 'o', 'n', 't'): {
86 const CPDF_Array* pFont = pObject->AsArray();
87 if (!pFont)
88 break;
89
90 m_TextState.SetFontSize(pFont->GetFloatAt(1));
91 m_TextState.SetFont(pParser->FindFont(pFont->GetByteStringAt(0)));
92 break;
93 }
94 case FXBSTR_ID('T', 'R', 0, 0):
95 if (pGS->KeyExist("TR2")) {
96 continue;
97 }
98 [[fallthrough]];
99 case FXBSTR_ID('T', 'R', '2', 0):
100 m_GeneralState.SetTR(!pObject->IsName() ? std::move(pObject) : nullptr);
101 break;
102 case FXBSTR_ID('B', 'M', 0, 0): {
103 const CPDF_Array* pArray = pObject->AsArray();
104 m_GeneralState.SetBlendMode(pArray ? pArray->GetByteStringAt(0)
105 : pObject->GetString());
106 if (m_GeneralState.GetBlendType() > BlendMode::kMultiply)
107 pParser->GetPageObjectHolder()->SetBackgroundAlphaNeeded(true);
108 break;
109 }
110 case FXBSTR_ID('S', 'M', 'a', 's'): {
111 RetainPtr<CPDF_Dictionary> pMaskDict = ToDictionary(pObject);
112 m_GeneralState.SetSoftMask(pMaskDict);
113 if (pMaskDict)
114 m_GeneralState.SetSMaskMatrix(pParser->GetCurStates()->m_CTM);
115 break;
116 }
117 case FXBSTR_ID('C', 'A', 0, 0):
118 m_GeneralState.SetStrokeAlpha(
119 std::clamp(pObject->GetNumber(), 0.0f, 1.0f));
120 break;
121 case FXBSTR_ID('c', 'a', 0, 0):
122 m_GeneralState.SetFillAlpha(
123 std::clamp(pObject->GetNumber(), 0.0f, 1.0f));
124 break;
125 case FXBSTR_ID('O', 'P', 0, 0):
126 m_GeneralState.SetStrokeOP(!!pObject->GetInteger());
127 if (!pGS->KeyExist("op"))
128 m_GeneralState.SetFillOP(!!pObject->GetInteger());
129 break;
130 case FXBSTR_ID('o', 'p', 0, 0):
131 m_GeneralState.SetFillOP(!!pObject->GetInteger());
132 break;
133 case FXBSTR_ID('O', 'P', 'M', 0):
134 m_GeneralState.SetOPMode(pObject->GetInteger());
135 break;
136 case FXBSTR_ID('B', 'G', 0, 0):
137 if (pGS->KeyExist("BG2")) {
138 continue;
139 }
140 [[fallthrough]];
141 case FXBSTR_ID('B', 'G', '2', 0):
142 m_GeneralState.SetBG(std::move(pObject));
143 break;
144 case FXBSTR_ID('U', 'C', 'R', 0):
145 if (pGS->KeyExist("UCR2")) {
146 continue;
147 }
148 [[fallthrough]];
149 case FXBSTR_ID('U', 'C', 'R', '2'):
150 m_GeneralState.SetUCR(std::move(pObject));
151 break;
152 case FXBSTR_ID('H', 'T', 0, 0):
153 m_GeneralState.SetHT(std::move(pObject));
154 break;
155 case FXBSTR_ID('F', 'L', 0, 0):
156 m_GeneralState.SetFlatness(pObject->GetNumber());
157 break;
158 case FXBSTR_ID('S', 'M', 0, 0):
159 m_GeneralState.SetSmoothness(pObject->GetNumber());
160 break;
161 case FXBSTR_ID('S', 'A', 0, 0):
162 m_GeneralState.SetStrokeAdjust(!!pObject->GetInteger());
163 break;
164 case FXBSTR_ID('A', 'I', 'S', 0):
165 m_GeneralState.SetAlphaSource(!!pObject->GetInteger());
166 break;
167 case FXBSTR_ID('T', 'K', 0, 0):
168 m_GeneralState.SetTextKnockout(!!pObject->GetInteger());
169 break;
170 }
171 }
172 m_GeneralState.SetMatrix(m_CTM);
173 }
174