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
|
// Copyright 2014 The PDFium Authors
// 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_devicecs.h"
#include <algorithm>
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fpdfapi/parser/cpdf_string.h"
#include "core/fxcodec/fx_codec.h"
#include "core/fxge/dib/cfx_cmyk_to_srgb.h"
#include "third_party/base/check.h"
#include "third_party/base/notreached.h"
namespace {
float NormalizeChannel(float fVal) {
return std::clamp(fVal, 0.0f, 1.0f);
}
} // namespace
CPDF_DeviceCS::CPDF_DeviceCS(Family family) : CPDF_ColorSpace(family) {
DCHECK(family == Family::kDeviceGray || family == Family::kDeviceRGB ||
family == Family::kDeviceCMYK);
SetComponentsForStockCS(ComponentsForFamily(GetFamily()));
}
CPDF_DeviceCS::~CPDF_DeviceCS() = default;
uint32_t CPDF_DeviceCS::v_Load(CPDF_Document* pDoc,
const CPDF_Array* pArray,
std::set<const CPDF_Object*>* pVisited) {
// Unlike other classes that inherit from CPDF_ColorSpace, CPDF_DeviceCS is
// never loaded by CPDF_ColorSpace.
NOTREACHED_NORETURN();
}
bool CPDF_DeviceCS::GetRGB(pdfium::span<const float> pBuf,
float* R,
float* G,
float* B) const {
switch (GetFamily()) {
case Family::kDeviceGray:
*R = NormalizeChannel(pBuf[0]);
*G = *R;
*B = *R;
return true;
case Family::kDeviceRGB:
*R = NormalizeChannel(pBuf[0]);
*G = NormalizeChannel(pBuf[1]);
*B = NormalizeChannel(pBuf[2]);
return true;
case Family::kDeviceCMYK:
if (IsStdConversionEnabled()) {
float k = pBuf[3];
*R = 1.0f - std::min(1.0f, pBuf[0] + k);
*G = 1.0f - std::min(1.0f, pBuf[1] + k);
*B = 1.0f - std::min(1.0f, pBuf[2] + k);
} else {
std::tie(*R, *G, *B) = AdobeCMYK_to_sRGB(
NormalizeChannel(pBuf[0]), NormalizeChannel(pBuf[1]),
NormalizeChannel(pBuf[2]), NormalizeChannel(pBuf[3]));
}
return true;
default:
NOTREACHED_NORETURN();
}
}
void CPDF_DeviceCS::TranslateImageLine(pdfium::span<uint8_t> dest_span,
pdfium::span<const uint8_t> src_span,
int pixels,
int image_width,
int image_height,
bool bTransMask) const {
uint8_t* pDestBuf = dest_span.data();
const uint8_t* pSrcBuf = src_span.data();
switch (GetFamily()) {
case Family::kDeviceGray:
for (int i = 0; i < pixels; i++) {
// Compiler can not conclude that src/dest don't overlap, avoid
// duplicate loads.
const uint8_t pix = pSrcBuf[i];
*pDestBuf++ = pix;
*pDestBuf++ = pix;
*pDestBuf++ = pix;
}
break;
case Family::kDeviceRGB:
fxcodec::ReverseRGB(pDestBuf, pSrcBuf, pixels);
break;
case Family::kDeviceCMYK:
if (bTransMask) {
for (int i = 0; i < pixels; i++) {
// Compiler can't conclude src/dest don't overlap, avoid interleaved
// loads and stores.
const uint8_t s0 = pSrcBuf[0];
const uint8_t s1 = pSrcBuf[1];
const uint8_t s2 = pSrcBuf[2];
const int k = 255 - pSrcBuf[3];
pDestBuf[0] = ((255 - s0) * k) / 255;
pDestBuf[1] = ((255 - s1) * k) / 255;
pDestBuf[2] = ((255 - s2) * k) / 255;
pDestBuf += 3;
pSrcBuf += 4;
}
} else {
if (IsStdConversionEnabled()) {
for (int i = 0; i < pixels; i++) {
// Compiler can't conclude src/dest don't overlap, avoid
// interleaved loads and stores.
const uint8_t s0 = pSrcBuf[0];
const uint8_t s1 = pSrcBuf[1];
const uint8_t s2 = pSrcBuf[2];
const uint8_t k = pSrcBuf[3];
pDestBuf[2] = 255 - std::min(255, s0 + k);
pDestBuf[1] = 255 - std::min(255, s1 + k);
pDestBuf[0] = 255 - std::min(255, s2 + k);
pSrcBuf += 4;
pDestBuf += 3;
}
} else {
for (int i = 0; i < pixels; i++) {
std::tie(pDestBuf[2], pDestBuf[1], pDestBuf[0]) =
AdobeCMYK_to_sRGB1(pSrcBuf[0], pSrcBuf[1], pSrcBuf[2],
pSrcBuf[3]);
pSrcBuf += 4;
pDestBuf += 3;
}
}
}
break;
default:
NOTREACHED_NORETURN();
}
}
|
