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
|
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkCodec.h"
#include "SkCodecPriv.h"
#include "SkSampler.h"
#include "SkUtils.h"
void SkSampler::Fill(const SkImageInfo& info, void* dst, size_t rowBytes,
uint64_t colorOrIndex, SkCodec::ZeroInitialized zeroInit) {
SkASSERT(dst != nullptr);
// Calculate bytes to fill.
const size_t bytesToFill = info.computeByteSize(rowBytes);
const int width = info.width();
const int numRows = info.height();
// Use the proper memset routine to fill the remaining bytes
switch (info.colorType()) {
case kRGBA_8888_SkColorType:
case kBGRA_8888_SkColorType: {
// If memory is zero initialized, we may not need to fill
uint32_t color = (uint32_t) colorOrIndex;
if (SkCodec::kYes_ZeroInitialized == zeroInit && 0 == color) {
return;
}
uint32_t* dstRow = (uint32_t*) dst;
for (int row = 0; row < numRows; row++) {
sk_memset32((uint32_t*) dstRow, color, width);
dstRow = SkTAddOffset<uint32_t>(dstRow, rowBytes);
}
break;
}
case kRGB_565_SkColorType: {
// If the destination is k565, the caller passes in a 16-bit color.
// We will not assert that the high bits of colorOrIndex must be zeroed.
// This allows us to take advantage of the fact that the low 16 bits of an
// SKPMColor may be a valid a 565 color. For example, the low 16
// bits of SK_ColorBLACK are identical to the 565 representation
// for black.
// If memory is zero initialized, we may not need to fill
uint16_t color = (uint16_t) colorOrIndex;
if (SkCodec::kYes_ZeroInitialized == zeroInit && 0 == color) {
return;
}
uint16_t* dstRow = (uint16_t*) dst;
for (int row = 0; row < numRows; row++) {
sk_memset16((uint16_t*) dstRow, color, width);
dstRow = SkTAddOffset<uint16_t>(dstRow, rowBytes);
}
break;
}
case kGray_8_SkColorType:
// If the destination is kGray, the caller passes in an 8-bit color.
// We will not assert that the high bits of colorOrIndex must be zeroed.
// This allows us to take advantage of the fact that the low 8 bits of an
// SKPMColor may be a valid a grayscale color. For example, the low 8
// bits of SK_ColorBLACK are identical to the grayscale representation
// for black.
// If memory is zero initialized, we may not need to fill
if (SkCodec::kYes_ZeroInitialized == zeroInit && 0 == (uint8_t) colorOrIndex) {
return;
}
memset(dst, (uint8_t) colorOrIndex, bytesToFill);
break;
case kRGBA_F16_SkColorType: {
uint64_t color = colorOrIndex;
if (SkCodec::kYes_ZeroInitialized == zeroInit && 0 == color) {
return;
}
uint64_t* dstRow = (uint64_t*) dst;
for (int row = 0; row < numRows; row++) {
sk_memset64((uint64_t*) dstRow, color, width);
dstRow = SkTAddOffset<uint64_t>(dstRow, rowBytes);
}
break;
}
default:
SkCodecPrintf("Error: Unsupported dst color type for fill(). Doing nothing.\n");
SkASSERT(false);
break;
}
}
|
