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
|
// 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/fpdf_font/cpdf_type3font.h"
#include "core/fpdfapi/fpdf_font/cpdf_type3char.h"
#include "core/fpdfapi/fpdf_page/include/cpdf_form.h"
#include "core/fpdfapi/fpdf_page/pageint.h"
#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
#include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
#include "core/fxcrt/include/fx_system.h"
#include "third_party/base/stl_util.h"
CPDF_Type3Font::CPDF_Type3Font()
: m_pCharProcs(nullptr),
m_pPageResources(nullptr),
m_pFontResources(nullptr) {
FXSYS_memset(m_CharWidthL, 0, sizeof(m_CharWidthL));
}
CPDF_Type3Font::~CPDF_Type3Font() {
for (auto it : m_CacheMap)
delete it.second;
}
bool CPDF_Type3Font::IsType3Font() const {
return true;
}
const CPDF_Type3Font* CPDF_Type3Font::AsType3Font() const {
return this;
}
CPDF_Type3Font* CPDF_Type3Font::AsType3Font() {
return this;
}
FX_BOOL CPDF_Type3Font::Load() {
m_pFontResources = m_pFontDict->GetDictBy("Resources");
CPDF_Array* pMatrix = m_pFontDict->GetArrayBy("FontMatrix");
FX_FLOAT xscale = 1.0f, yscale = 1.0f;
if (pMatrix) {
m_FontMatrix = pMatrix->GetMatrix();
xscale = m_FontMatrix.a;
yscale = m_FontMatrix.d;
}
CPDF_Array* pBBox = m_pFontDict->GetArrayBy("FontBBox");
if (pBBox) {
m_FontBBox.left = (int32_t)(pBBox->GetNumberAt(0) * xscale * 1000);
m_FontBBox.bottom = (int32_t)(pBBox->GetNumberAt(1) * yscale * 1000);
m_FontBBox.right = (int32_t)(pBBox->GetNumberAt(2) * xscale * 1000);
m_FontBBox.top = (int32_t)(pBBox->GetNumberAt(3) * yscale * 1000);
}
int StartChar = m_pFontDict->GetIntegerBy("FirstChar");
CPDF_Array* pWidthArray = m_pFontDict->GetArrayBy("Widths");
if (pWidthArray && (StartChar >= 0 && StartChar < 256)) {
uint32_t count = pWidthArray->GetCount();
if (count > 256) {
count = 256;
}
if (StartChar + count > 256) {
count = 256 - StartChar;
}
for (uint32_t i = 0; i < count; i++) {
m_CharWidthL[StartChar + i] =
FXSYS_round(pWidthArray->GetNumberAt(i) * xscale * 1000);
}
}
m_pCharProcs = m_pFontDict->GetDictBy("CharProcs");
CPDF_Object* pEncoding = m_pFontDict->GetElementValue("Encoding");
if (pEncoding) {
LoadPDFEncoding(pEncoding, m_BaseEncoding, m_pCharNames, FALSE, FALSE);
if (m_pCharNames) {
for (int i = 0; i < 256; i++) {
m_Encoding.m_Unicodes[i] = PDF_UnicodeFromAdobeName(m_pCharNames[i]);
if (m_Encoding.m_Unicodes[i] == 0) {
m_Encoding.m_Unicodes[i] = i;
}
}
}
}
return TRUE;
}
void CPDF_Type3Font::CheckType3FontMetrics() {
CheckFontMetrics();
}
CPDF_Type3Char* CPDF_Type3Font::LoadChar(uint32_t charcode, int level) {
if (level >= _FPDF_MAX_TYPE3_FORM_LEVEL_)
return nullptr;
auto it = m_CacheMap.find(charcode);
if (it != m_CacheMap.end())
return it->second;
const FX_CHAR* name =
GetAdobeCharName(m_BaseEncoding, m_pCharNames, charcode);
if (!name)
return nullptr;
CPDF_Stream* pStream =
ToStream(m_pCharProcs ? m_pCharProcs->GetElementValue(name) : nullptr);
if (!pStream)
return nullptr;
std::unique_ptr<CPDF_Type3Char> pNewChar(new CPDF_Type3Char(new CPDF_Form(
m_pDocument, m_pFontResources ? m_pFontResources : m_pPageResources,
pStream, nullptr)));
// This can trigger recursion into this method. The content of |m_CacheMap|
// can change as a result. Thus after it returns, check the cache again for
// a cache hit.
pNewChar->m_pForm->ParseContent(nullptr, nullptr, pNewChar.get(), nullptr,
level + 1);
it = m_CacheMap.find(charcode);
if (it != m_CacheMap.end())
return it->second;
FX_FLOAT scale = m_FontMatrix.GetXUnit();
pNewChar->m_Width = (int32_t)(pNewChar->m_Width * scale + 0.5f);
FX_RECT& rcBBox = pNewChar->m_BBox;
CFX_FloatRect char_rect(
(FX_FLOAT)rcBBox.left / 1000.0f, (FX_FLOAT)rcBBox.bottom / 1000.0f,
(FX_FLOAT)rcBBox.right / 1000.0f, (FX_FLOAT)rcBBox.top / 1000.0f);
if (rcBBox.right <= rcBBox.left || rcBBox.bottom >= rcBBox.top)
char_rect = pNewChar->m_pForm->CalcBoundingBox();
char_rect.Transform(&m_FontMatrix);
rcBBox.left = FXSYS_round(char_rect.left * 1000);
rcBBox.right = FXSYS_round(char_rect.right * 1000);
rcBBox.top = FXSYS_round(char_rect.top * 1000);
rcBBox.bottom = FXSYS_round(char_rect.bottom * 1000);
ASSERT(!pdfium::ContainsKey(m_CacheMap, charcode));
CPDF_Type3Char* pCachedChar = pNewChar.release();
m_CacheMap[charcode] = pCachedChar;
if (pCachedChar->m_pForm->GetPageObjectList()->empty()) {
delete pCachedChar->m_pForm;
pCachedChar->m_pForm = nullptr;
}
return pCachedChar;
}
int CPDF_Type3Font::GetCharWidthF(uint32_t charcode, int level) {
if (charcode >= FX_ArraySize(m_CharWidthL))
charcode = 0;
if (m_CharWidthL[charcode])
return m_CharWidthL[charcode];
const CPDF_Type3Char* pChar = LoadChar(charcode, level);
return pChar ? pChar->m_Width : 0;
}
FX_RECT CPDF_Type3Font::GetCharBBox(uint32_t charcode, int level) {
const CPDF_Type3Char* pChar = LoadChar(charcode, level);
return pChar ? pChar->m_BBox : FX_RECT();
}
|
