1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
// Copyright 2016 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "core/fpdfapi/page/cpdf_page.h"
#include <set>
#include <utility>
#include "core/fpdfapi/cpdf_pagerendercontext.h"
#include "core/fpdfapi/page/cpdf_contentparser.h"
#include "core/fpdfapi/page/cpdf_pageobject.h"
#include "core/fpdfapi/page/pageint.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_object.h"
#include "core/fpdfapi/render/cpdf_pagerendercache.h"
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
CPDF_Page::CPDF_Page(CPDF_Document* pDocument,
CPDF_Dictionary* pPageDict,
bool bPageCache)
: m_PageWidth(100),
m_PageHeight(100),
m_pView(nullptr),
m_pPageRender(bPageCache ? new CPDF_PageRenderCache(this) : nullptr) {
m_pFormDict = pPageDict;
m_pDocument = pDocument;
if (!pPageDict)
return;
CPDF_Object* pageAttr = GetPageAttr("Resources");
m_pResources = pageAttr ? pageAttr->GetDict() : nullptr;
m_pPageResources = m_pResources;
CPDF_Object* pRotate = GetPageAttr("Rotate");
int rotate = pRotate ? pRotate->GetInteger() / 90 % 4 : 0;
if (rotate < 0)
rotate += 4;
CPDF_Array* pMediaBox = ToArray(GetPageAttr("MediaBox"));
CFX_FloatRect mediabox;
if (pMediaBox) {
mediabox = pMediaBox->GetRect();
mediabox.Normalize();
}
if (mediabox.IsEmpty())
mediabox = CFX_FloatRect(0, 0, 612, 792);
CPDF_Array* pCropBox = ToArray(GetPageAttr("CropBox"));
if (pCropBox) {
m_BBox = pCropBox->GetRect();
m_BBox.Normalize();
}
if (m_BBox.IsEmpty())
m_BBox = mediabox;
else
m_BBox.Intersect(mediabox);
m_PageWidth = m_BBox.right - m_BBox.left;
m_PageHeight = m_BBox.top - m_BBox.bottom;
if (rotate % 2)
std::swap(m_PageWidth, m_PageHeight);
switch (rotate) {
case 0:
m_PageMatrix = CFX_Matrix(1.0f, 0, 0, 1.0f, -m_BBox.left, -m_BBox.bottom);
break;
case 1:
m_PageMatrix =
CFX_Matrix(0, -1.0f, 1.0f, 0, -m_BBox.bottom, m_BBox.right);
break;
case 2:
m_PageMatrix = CFX_Matrix(-1.0f, 0, 0, -1.0f, m_BBox.right, m_BBox.top);
break;
case 3:
m_PageMatrix = CFX_Matrix(0, 1.0f, -1.0f, 0, m_BBox.top, -m_BBox.left);
break;
}
m_Transparency = PDFTRANS_ISOLATED;
LoadTransInfo();
}
CPDF_Page::~CPDF_Page() {}
void CPDF_Page::StartParse() {
if (m_ParseState == CONTENT_PARSED || m_ParseState == CONTENT_PARSING)
return;
m_pParser = pdfium::MakeUnique<CPDF_ContentParser>();
m_pParser->Start(this);
m_ParseState = CONTENT_PARSING;
}
void CPDF_Page::ParseContent() {
StartParse();
ContinueParse(nullptr);
}
void CPDF_Page::SetRenderContext(
std::unique_ptr<CPDF_PageRenderContext> pContext) {
m_pRenderContext = std::move(pContext);
}
CPDF_Object* CPDF_Page::GetPageAttr(const CFX_ByteString& name) const {
CPDF_Dictionary* pPageDict = m_pFormDict;
std::set<CPDF_Dictionary*> visited;
while (1) {
visited.insert(pPageDict);
if (CPDF_Object* pObj = pPageDict->GetDirectObjectFor(name))
return pObj;
pPageDict = pPageDict->GetDictFor("Parent");
if (!pPageDict || pdfium::ContainsKey(visited, pPageDict))
break;
}
return nullptr;
}
CFX_Matrix CPDF_Page::GetDisplayMatrix(int xPos,
int yPos,
int xSize,
int ySize,
int iRotate) const {
if (m_PageWidth == 0 || m_PageHeight == 0)
return CFX_Matrix();
float x0 = 0;
float y0 = 0;
float x1 = 0;
float y1 = 0;
float x2 = 0;
float y2 = 0;
iRotate %= 4;
switch (iRotate) {
case 0:
x0 = xPos;
y0 = yPos + ySize;
x1 = xPos;
y1 = yPos;
x2 = xPos + xSize;
y2 = yPos + ySize;
break;
case 1:
x0 = xPos;
y0 = yPos;
x1 = xPos + xSize;
y1 = yPos;
x2 = xPos;
y2 = yPos + ySize;
break;
case 2:
x0 = xPos + xSize;
y0 = yPos;
x1 = xPos + xSize;
y1 = yPos + ySize;
x2 = xPos;
y2 = yPos;
break;
case 3:
x0 = xPos + xSize;
y0 = yPos + ySize;
x1 = xPos;
y1 = yPos + ySize;
x2 = xPos + xSize;
y2 = yPos;
break;
}
CFX_Matrix matrix = m_PageMatrix;
matrix.Concat(CFX_Matrix((x2 - x0) / m_PageWidth, (y2 - y0) / m_PageWidth,
(x1 - x0) / m_PageHeight, (y1 - y0) / m_PageHeight,
x0, y0));
return matrix;
}
bool GraphicsData::operator<(const GraphicsData& other) const {
if (fillAlpha != other.fillAlpha)
return fillAlpha < other.fillAlpha;
return strokeAlpha < other.strokeAlpha;
}
bool FontData::operator<(const FontData& other) const {
return baseFont < other.baseFont;
}
|
