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 #include "third_party/base/cxx17_backports.h"
22
23 CPDF_AllStates::CPDF_AllStates() = default;
24
25 CPDF_AllStates::~CPDF_AllStates() = default;
26
Copy(const CPDF_AllStates & src)27 void CPDF_AllStates::Copy(const CPDF_AllStates& src) {
28 CopyStates(src);
29 m_GraphicsResourceName = src.m_GraphicsResourceName;
30 m_TextMatrix = src.m_TextMatrix;
31 m_ParentMatrix = src.m_ParentMatrix;
32 m_CTM = src.m_CTM;
33 m_TextPos = src.m_TextPos;
34 m_TextLinePos = src.m_TextLinePos;
35 m_TextLeading = src.m_TextLeading;
36 m_TextRise = src.m_TextRise;
37 m_TextHorzScale = src.m_TextHorzScale;
38 }
39
SetLineDash(const CPDF_Array * pArray,float phase,float scale)40 void CPDF_AllStates::SetLineDash(const CPDF_Array* pArray,
41 float phase,
42 float scale) {
43 std::vector<float> dashes = ReadArrayElementsToVector(pArray, pArray->size());
44 m_GraphState.SetLineDash(std::move(dashes), phase, scale);
45 }
46
ProcessExtGS(const CPDF_Dictionary * pGS,CPDF_StreamContentParser * pParser)47 void CPDF_AllStates::ProcessExtGS(const CPDF_Dictionary* pGS,
48 CPDF_StreamContentParser* pParser) {
49 CPDF_DictionaryLocker locker(pGS);
50 for (const auto& it : locker) {
51 RetainPtr<CPDF_Object> pObject = it.second->GetMutableDirect();
52 if (!pObject)
53 continue;
54
55 uint32_t key = it.first.GetID();
56 switch (key) {
57 case FXBSTR_ID('L', 'W', 0, 0):
58 m_GraphState.SetLineWidth(pObject->GetNumber());
59 break;
60 case FXBSTR_ID('L', 'C', 0, 0):
61 m_GraphState.SetLineCap(
62 static_cast<CFX_GraphStateData::LineCap>(pObject->GetInteger()));
63 break;
64 case FXBSTR_ID('L', 'J', 0, 0):
65 m_GraphState.SetLineJoin(
66 static_cast<CFX_GraphStateData::LineJoin>(pObject->GetInteger()));
67 break;
68 case FXBSTR_ID('M', 'L', 0, 0):
69 m_GraphState.SetMiterLimit(pObject->GetNumber());
70 break;
71 case FXBSTR_ID('D', 0, 0, 0): {
72 const CPDF_Array* pDash = pObject->AsArray();
73 if (!pDash)
74 break;
75
76 RetainPtr<const CPDF_Array> pArray = pDash->GetArrayAt(0);
77 if (!pArray)
78 break;
79
80 SetLineDash(pArray.Get(), pDash->GetFloatAt(1), 1.0f);
81 break;
82 }
83 case FXBSTR_ID('R', 'I', 0, 0):
84 m_GeneralState.SetRenderIntent(pObject->GetString());
85 break;
86 case FXBSTR_ID('F', 'o', 'n', 't'): {
87 const CPDF_Array* pFont = pObject->AsArray();
88 if (!pFont)
89 break;
90
91 m_TextState.SetFontSize(pFont->GetFloatAt(1));
92 m_TextState.SetFont(pParser->FindFont(pFont->GetByteStringAt(0)));
93 break;
94 }
95 case FXBSTR_ID('T', 'R', 0, 0):
96 if (pGS->KeyExist("TR2")) {
97 continue;
98 }
99 [[fallthrough]];
100 case FXBSTR_ID('T', 'R', '2', 0):
101 m_GeneralState.SetTR(!pObject->IsName() ? std::move(pObject) : nullptr);
102 break;
103 case FXBSTR_ID('B', 'M', 0, 0): {
104 const CPDF_Array* pArray = pObject->AsArray();
105 m_GeneralState.SetBlendMode(pArray ? pArray->GetByteStringAt(0)
106 : pObject->GetString());
107 if (m_GeneralState.GetBlendType() > BlendMode::kMultiply)
108 pParser->GetPageObjectHolder()->SetBackgroundAlphaNeeded(true);
109 break;
110 }
111 case FXBSTR_ID('S', 'M', 'a', 's'): {
112 RetainPtr<CPDF_Dictionary> pMaskDict = ToDictionary(pObject);
113 m_GeneralState.SetSoftMask(pMaskDict);
114 if (pMaskDict)
115 m_GeneralState.SetSMaskMatrix(pParser->GetCurStates()->m_CTM);
116 break;
117 }
118 case FXBSTR_ID('C', 'A', 0, 0):
119 m_GeneralState.SetStrokeAlpha(
120 pdfium::clamp(pObject->GetNumber(), 0.0f, 1.0f));
121 break;
122 case FXBSTR_ID('c', 'a', 0, 0):
123 m_GeneralState.SetFillAlpha(
124 pdfium::clamp(pObject->GetNumber(), 0.0f, 1.0f));
125 break;
126 case FXBSTR_ID('O', 'P', 0, 0):
127 m_GeneralState.SetStrokeOP(!!pObject->GetInteger());
128 if (!pGS->KeyExist("op"))
129 m_GeneralState.SetFillOP(!!pObject->GetInteger());
130 break;
131 case FXBSTR_ID('o', 'p', 0, 0):
132 m_GeneralState.SetFillOP(!!pObject->GetInteger());
133 break;
134 case FXBSTR_ID('O', 'P', 'M', 0):
135 m_GeneralState.SetOPMode(pObject->GetInteger());
136 break;
137 case FXBSTR_ID('B', 'G', 0, 0):
138 if (pGS->KeyExist("BG2")) {
139 continue;
140 }
141 [[fallthrough]];
142 case FXBSTR_ID('B', 'G', '2', 0):
143 m_GeneralState.SetBG(std::move(pObject));
144 break;
145 case FXBSTR_ID('U', 'C', 'R', 0):
146 if (pGS->KeyExist("UCR2")) {
147 continue;
148 }
149 [[fallthrough]];
150 case FXBSTR_ID('U', 'C', 'R', '2'):
151 m_GeneralState.SetUCR(std::move(pObject));
152 break;
153 case FXBSTR_ID('H', 'T', 0, 0):
154 m_GeneralState.SetHT(std::move(pObject));
155 break;
156 case FXBSTR_ID('F', 'L', 0, 0):
157 m_GeneralState.SetFlatness(pObject->GetNumber());
158 break;
159 case FXBSTR_ID('S', 'M', 0, 0):
160 m_GeneralState.SetSmoothness(pObject->GetNumber());
161 break;
162 case FXBSTR_ID('S', 'A', 0, 0):
163 m_GeneralState.SetStrokeAdjust(!!pObject->GetInteger());
164 break;
165 case FXBSTR_ID('A', 'I', 'S', 0):
166 m_GeneralState.SetAlphaSource(!!pObject->GetInteger());
167 break;
168 case FXBSTR_ID('T', 'K', 0, 0):
169 m_GeneralState.SetTextKnockout(!!pObject->GetInteger());
170 break;
171 }
172 }
173 m_GeneralState.SetMatrix(m_CTM);
174 }
175