blob: 39d1fcd0b425b2d0609e559266473ff13ec39d04 (
plain)
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
|
// 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/render/cpdf_docrenderdata.h"
#include <memory>
#include "core/fpdfapi/font/cpdf_type3font.h"
#include "core/fpdfapi/page/pageint.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/render/cpdf_dibsource.h"
#include "core/fpdfapi/render/cpdf_transferfunc.h"
#include "core/fpdfapi/render/cpdf_type3cache.h"
namespace {
const int kMaxOutputs = 16;
} // namespace
CPDF_DocRenderData::CPDF_DocRenderData(CPDF_Document* pPDFDoc)
: m_pPDFDoc(pPDFDoc) {}
CPDF_DocRenderData::~CPDF_DocRenderData() {
Clear(true);
}
void CPDF_DocRenderData::Clear(bool bRelease) {
for (auto it = m_Type3FaceMap.begin(); it != m_Type3FaceMap.end();) {
auto curr_it = it++;
CPDF_CountedObject<CPDF_Type3Cache>* cache = curr_it->second;
if (bRelease || cache->use_count() < 2) {
delete cache->get();
delete cache;
m_Type3FaceMap.erase(curr_it);
}
}
for (auto it = m_TransferFuncMap.begin(); it != m_TransferFuncMap.end();) {
auto curr_it = it++;
if (bRelease || curr_it->second->HasOneRef())
m_TransferFuncMap.erase(curr_it);
}
}
CPDF_Type3Cache* CPDF_DocRenderData::GetCachedType3(CPDF_Type3Font* pFont) {
CPDF_CountedObject<CPDF_Type3Cache>* pCache;
auto it = m_Type3FaceMap.find(pFont);
if (it == m_Type3FaceMap.end()) {
pCache = new CPDF_CountedObject<CPDF_Type3Cache>(
pdfium::MakeUnique<CPDF_Type3Cache>(pFont));
m_Type3FaceMap[pFont] = pCache;
} else {
pCache = it->second;
}
return pCache->AddRef();
}
void CPDF_DocRenderData::ReleaseCachedType3(CPDF_Type3Font* pFont) {
auto it = m_Type3FaceMap.find(pFont);
if (it != m_Type3FaceMap.end()) {
it->second->RemoveRef();
if (it->second->use_count() < 2) {
delete it->second->get();
delete it->second;
m_Type3FaceMap.erase(it);
}
}
}
CFX_RetainPtr<CPDF_TransferFunc> CPDF_DocRenderData::GetTransferFunc(
CPDF_Object* pObj) {
if (!pObj)
return nullptr;
auto it = m_TransferFuncMap.find(pObj);
if (it != m_TransferFuncMap.end())
return it->second;
std::unique_ptr<CPDF_Function> pFuncs[3];
bool bUniTransfer = true;
bool bIdentity = true;
if (CPDF_Array* pArray = pObj->AsArray()) {
bUniTransfer = false;
if (pArray->GetCount() < 3)
return nullptr;
for (uint32_t i = 0; i < 3; ++i) {
pFuncs[2 - i] = CPDF_Function::Load(pArray->GetDirectObjectAt(i));
if (!pFuncs[2 - i])
return nullptr;
}
} else {
pFuncs[0] = CPDF_Function::Load(pObj);
if (!pFuncs[0])
return nullptr;
}
auto pTransfer = pdfium::MakeRetain<CPDF_TransferFunc>(m_pPDFDoc);
m_TransferFuncMap[pObj] = pTransfer;
float input;
int noutput;
float output[kMaxOutputs];
memset(output, 0, sizeof(output));
for (int v = 0; v < 256; ++v) {
input = (float)v / 255.0f;
if (bUniTransfer) {
if (pFuncs[0] && pFuncs[0]->CountOutputs() <= kMaxOutputs)
pFuncs[0]->Call(&input, 1, output, &noutput);
int o = FXSYS_round(output[0] * 255);
if (o != v)
bIdentity = false;
for (int i = 0; i < 3; ++i)
pTransfer->m_Samples[i * 256 + v] = o;
continue;
}
for (int i = 0; i < 3; ++i) {
if (!pFuncs[i] || pFuncs[i]->CountOutputs() > kMaxOutputs) {
pTransfer->m_Samples[i * 256 + v] = v;
continue;
}
pFuncs[i]->Call(&input, 1, output, &noutput);
int o = FXSYS_round(output[0] * 255);
if (o != v)
bIdentity = false;
pTransfer->m_Samples[i * 256 + v] = o;
}
}
pTransfer->m_bIdentity = bIdentity;
return pTransfer;
}
void CPDF_DocRenderData::MaybePurgeTransferFunc(CPDF_Object* pObj) {
auto it = m_TransferFuncMap.find(pObj);
if (it != m_TransferFuncMap.end() && it->second->HasOneRef())
m_TransferFuncMap.erase(it);
}
|
