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