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
11 #include "core/fpdfapi/page/cpdf_pageobjectholder.h"
12 #include "core/fpdfapi/page/cpdf_streamcontentparser.h"
13 #include "core/fpdfapi/page/pageint.h"
14 #include "core/fpdfapi/parser/cpdf_array.h"
15 #include "core/fpdfapi/parser/cpdf_dictionary.h"
16 #include "core/fxge/cfx_graphstatedata.h"
17
18 namespace {
19
ClipFloat(FX_FLOAT f)20 FX_FLOAT ClipFloat(FX_FLOAT f) {
21 return std::max(0.0f, std::min(1.0f, f));
22 }
23
24 } // namespace
25
CPDF_AllStates()26 CPDF_AllStates::CPDF_AllStates()
27 : m_TextLeading(0), m_TextRise(0), m_TextHorzScale(1.0f) {}
28
~CPDF_AllStates()29 CPDF_AllStates::~CPDF_AllStates() {}
30
Copy(const CPDF_AllStates & src)31 void CPDF_AllStates::Copy(const CPDF_AllStates& src) {
32 CopyStates(src);
33 m_TextMatrix = src.m_TextMatrix;
34 m_ParentMatrix = src.m_ParentMatrix;
35 m_CTM = src.m_CTM;
36 m_TextPos = src.m_TextPos;
37 m_TextLinePos = src.m_TextLinePos;
38 m_TextLeading = src.m_TextLeading;
39 m_TextRise = src.m_TextRise;
40 m_TextHorzScale = src.m_TextHorzScale;
41 }
42
SetLineDash(CPDF_Array * pArray,FX_FLOAT phase,FX_FLOAT scale)43 void CPDF_AllStates::SetLineDash(CPDF_Array* pArray,
44 FX_FLOAT phase,
45 FX_FLOAT scale) {
46 m_GraphState.SetLineDash(pArray, phase, scale);
47 }
48
ProcessExtGS(CPDF_Dictionary * pGS,CPDF_StreamContentParser * pParser)49 void CPDF_AllStates::ProcessExtGS(CPDF_Dictionary* pGS,
50 CPDF_StreamContentParser* pParser) {
51 for (const auto& it : *pGS) {
52 const CFX_ByteString& key_str = it.first;
53 CPDF_Object* pElement = it.second.get();
54 CPDF_Object* pObject = pElement ? pElement->GetDirect() : nullptr;
55 if (!pObject)
56 continue;
57
58 uint32_t key = key_str.GetID();
59 switch (key) {
60 case FXBSTR_ID('L', 'W', 0, 0):
61 m_GraphState.SetLineWidth(pObject->GetNumber());
62 break;
63 case FXBSTR_ID('L', 'C', 0, 0):
64 m_GraphState.SetLineCap(
65 static_cast<CFX_GraphStateData::LineCap>(pObject->GetInteger()));
66 break;
67 case FXBSTR_ID('L', 'J', 0, 0):
68 m_GraphState.SetLineJoin(
69 static_cast<CFX_GraphStateData::LineJoin>(pObject->GetInteger()));
70 break;
71 case FXBSTR_ID('M', 'L', 0, 0):
72 m_GraphState.SetMiterLimit(pObject->GetNumber());
73 break;
74 case FXBSTR_ID('D', 0, 0, 0): {
75 CPDF_Array* pDash = pObject->AsArray();
76 if (!pDash)
77 break;
78
79 CPDF_Array* pArray = pDash->GetArrayAt(0);
80 if (!pArray)
81 break;
82
83 SetLineDash(pArray, pDash->GetNumberAt(1), 1.0f);
84 break;
85 }
86 case FXBSTR_ID('R', 'I', 0, 0):
87 m_GeneralState.SetRenderIntent(pObject->GetString());
88 break;
89 case FXBSTR_ID('F', 'o', 'n', 't'): {
90 CPDF_Array* pFont = pObject->AsArray();
91 if (!pFont)
92 break;
93
94 m_TextState.SetFontSize(pFont->GetNumberAt(1));
95 m_TextState.SetFont(pParser->FindFont(pFont->GetStringAt(0)));
96 break;
97 }
98 case FXBSTR_ID('T', 'R', 0, 0):
99 if (pGS->KeyExist("TR2")) {
100 continue;
101 }
102 case FXBSTR_ID('T', 'R', '2', 0):
103 m_GeneralState.SetTR(pObject && !pObject->IsName() ? pObject : nullptr);
104 break;
105 case FXBSTR_ID('B', 'M', 0, 0): {
106 CPDF_Array* pArray = pObject->AsArray();
107 m_GeneralState.SetBlendMode(pArray ? pArray->GetStringAt(0)
108 : pObject->GetString());
109 if (m_GeneralState.GetBlendType() > FXDIB_BLEND_MULTIPLY)
110 pParser->GetPageObjectHolder()->SetBackgroundAlphaNeeded(true);
111 break;
112 }
113 case FXBSTR_ID('S', 'M', 'a', 's'):
114 if (ToDictionary(pObject)) {
115 m_GeneralState.SetSoftMask(pObject);
116 m_GeneralState.SetSMaskMatrix(pParser->GetCurStates()->m_CTM);
117 } else {
118 m_GeneralState.SetSoftMask(nullptr);
119 }
120 break;
121 case FXBSTR_ID('C', 'A', 0, 0):
122 m_GeneralState.SetStrokeAlpha(ClipFloat(pObject->GetNumber()));
123 break;
124 case FXBSTR_ID('c', 'a', 0, 0):
125 m_GeneralState.SetFillAlpha(ClipFloat(pObject->GetNumber()));
126 break;
127 case FXBSTR_ID('O', 'P', 0, 0):
128 m_GeneralState.SetStrokeOP(!!pObject->GetInteger());
129 if (!pGS->KeyExist("op"))
130 m_GeneralState.SetFillOP(!!pObject->GetInteger());
131 break;
132 case FXBSTR_ID('o', 'p', 0, 0):
133 m_GeneralState.SetFillOP(!!pObject->GetInteger());
134 break;
135 case FXBSTR_ID('O', 'P', 'M', 0):
136 m_GeneralState.SetOPMode(pObject->GetInteger());
137 break;
138 case FXBSTR_ID('B', 'G', 0, 0):
139 if (pGS->KeyExist("BG2")) {
140 continue;
141 }
142 case FXBSTR_ID('B', 'G', '2', 0):
143 m_GeneralState.SetBG(pObject);
144 break;
145 case FXBSTR_ID('U', 'C', 'R', 0):
146 if (pGS->KeyExist("UCR2")) {
147 continue;
148 }
149 case FXBSTR_ID('U', 'C', 'R', '2'):
150 m_GeneralState.SetUCR(pObject);
151 break;
152 case FXBSTR_ID('H', 'T', 0, 0):
153 m_GeneralState.SetHT(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