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_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/fxge/cfx_graphstatedata.h"
20 #include "third_party/base/compiler_specific.h"
21 #include "third_party/base/stl_util.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_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(CPDF_Dictionary * pGS,CPDF_StreamContentParser * pParser)46 void CPDF_AllStates::ProcessExtGS(CPDF_Dictionary* pGS,
47 CPDF_StreamContentParser* pParser) {
48 CPDF_DictionaryLocker locker(pGS);
49 for (const auto& it : locker) {
50 const ByteString& key_str = it.first;
51 CPDF_Object* pElement = it.second.Get();
52 CPDF_Object* pObject = pElement ? pElement->GetDirect() : nullptr;
53 if (!pObject)
54 continue;
55
56 uint32_t key = key_str.GetID();
57 switch (key) {
58 case FXBSTR_ID('L', 'W', 0, 0):
59 m_GraphState.SetLineWidth(pObject->GetNumber());
60 break;
61 case FXBSTR_ID('L', 'C', 0, 0):
62 m_GraphState.SetLineCap(
63 static_cast<CFX_GraphStateData::LineCap>(pObject->GetInteger()));
64 break;
65 case FXBSTR_ID('L', 'J', 0, 0):
66 m_GraphState.SetLineJoin(
67 static_cast<CFX_GraphStateData::LineJoin>(pObject->GetInteger()));
68 break;
69 case FXBSTR_ID('M', 'L', 0, 0):
70 m_GraphState.SetMiterLimit(pObject->GetNumber());
71 break;
72 case FXBSTR_ID('D', 0, 0, 0): {
73 CPDF_Array* pDash = pObject->AsArray();
74 if (!pDash)
75 break;
76
77 CPDF_Array* pArray = pDash->GetArrayAt(0);
78 if (!pArray)
79 break;
80
81 SetLineDash(pArray, pDash->GetNumberAt(1), 1.0f);
82 break;
83 }
84 case FXBSTR_ID('R', 'I', 0, 0):
85 m_GeneralState.SetRenderIntent(pObject->GetString());
86 break;
87 case FXBSTR_ID('F', 'o', 'n', 't'): {
88 CPDF_Array* pFont = pObject->AsArray();
89 if (!pFont)
90 break;
91
92 m_TextState.SetFontSize(pFont->GetNumberAt(1));
93 m_TextState.SetFont(pParser->FindFont(pFont->GetStringAt(0)));
94 break;
95 }
96 case FXBSTR_ID('T', 'R', 0, 0):
97 if (pGS->KeyExist("TR2")) {
98 continue;
99 }
100 FALLTHROUGH;
101 case FXBSTR_ID('T', 'R', '2', 0):
102 m_GeneralState.SetTR(pObject && !pObject->IsName() ? pObject : nullptr);
103 break;
104 case FXBSTR_ID('B', 'M', 0, 0): {
105 CPDF_Array* pArray = pObject->AsArray();
106 m_GeneralState.SetBlendMode(pArray ? pArray->GetStringAt(0)
107 : pObject->GetString());
108 if (m_GeneralState.GetBlendType() > BlendMode::kMultiply)
109 pParser->GetPageObjectHolder()->SetBackgroundAlphaNeeded(true);
110 break;
111 }
112 case FXBSTR_ID('S', 'M', 'a', 's'):
113 if (ToDictionary(pObject)) {
114 m_GeneralState.SetSoftMask(pObject);
115 m_GeneralState.SetSMaskMatrix(pParser->GetCurStates()->m_CTM);
116 } else {
117 m_GeneralState.SetSoftMask(nullptr);
118 }
119 break;
120 case FXBSTR_ID('C', 'A', 0, 0):
121 m_GeneralState.SetStrokeAlpha(
122 pdfium::clamp(pObject->GetNumber(), 0.0f, 1.0f));
123 break;
124 case FXBSTR_ID('c', 'a', 0, 0):
125 m_GeneralState.SetFillAlpha(
126 pdfium::clamp(pObject->GetNumber(), 0.0f, 1.0f));
127 break;
128 case FXBSTR_ID('O', 'P', 0, 0):
129 m_GeneralState.SetStrokeOP(!!pObject->GetInteger());
130 if (!pGS->KeyExist("op"))
131 m_GeneralState.SetFillOP(!!pObject->GetInteger());
132 break;
133 case FXBSTR_ID('o', 'p', 0, 0):
134 m_GeneralState.SetFillOP(!!pObject->GetInteger());
135 break;
136 case FXBSTR_ID('O', 'P', 'M', 0):
137 m_GeneralState.SetOPMode(pObject->GetInteger());
138 break;
139 case FXBSTR_ID('B', 'G', 0, 0):
140 if (pGS->KeyExist("BG2")) {
141 continue;
142 }
143 FALLTHROUGH;
144 case FXBSTR_ID('B', 'G', '2', 0):
145 m_GeneralState.SetBG(pObject);
146 break;
147 case FXBSTR_ID('U', 'C', 'R', 0):
148 if (pGS->KeyExist("UCR2")) {
149 continue;
150 }
151 FALLTHROUGH;
152 case FXBSTR_ID('U', 'C', 'R', '2'):
153 m_GeneralState.SetUCR(pObject);
154 break;
155 case FXBSTR_ID('H', 'T', 0, 0):
156 m_GeneralState.SetHT(pObject);
157 break;
158 case FXBSTR_ID('F', 'L', 0, 0):
159 m_GeneralState.SetFlatness(pObject->GetNumber());
160 break;
161 case FXBSTR_ID('S', 'M', 0, 0):
162 m_GeneralState.SetSmoothness(pObject->GetNumber());
163 break;
164 case FXBSTR_ID('S', 'A', 0, 0):
165 m_GeneralState.SetStrokeAdjust(!!pObject->GetInteger());
166 break;
167 case FXBSTR_ID('A', 'I', 'S', 0):
168 m_GeneralState.SetAlphaSource(!!pObject->GetInteger());
169 break;
170 case FXBSTR_ID('T', 'K', 0, 0):
171 m_GeneralState.SetTextKnockout(!!pObject->GetInteger());
172 break;
173 }
174 }
175 m_GeneralState.SetMatrix(m_CTM);
176 }
177