1/*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "src/codec/SkSampler.h"
9
10#include "include/codec/SkCodec.h"
11#include "include/core/SkColorType.h"
12#include "include/core/SkImageInfo.h"
13#include "include/private/base/SkTemplates.h"
14#include "src/codec/SkCodecPriv.h"
15#include "src/core/SkOpts.h"
16
17#include <cstdint>
18#include <cstring>
19
20void SkSampler::Fill(const SkImageInfo& info, void* dst, size_t rowBytes,
21 SkCodec::ZeroInitialized zeroInit) {
22 SkASSERT(dst != nullptr);
23
24 if (SkCodec::kYes_ZeroInitialized == zeroInit) {
25 return;
26 }
27
28 const int width = info.width();
29 const int numRows = info.height();
30
31 // Use the proper memset routine to fill the remaining bytes
32 switch (info.colorType()) {
33 case kRGBA_8888_SkColorType:
34 case kBGRA_8888_SkColorType: {
35 uint32_t* dstRow = (uint32_t*) dst;
36 for (int row = 0; row < numRows; row++) {
37 SkOpts::memset32(dstRow, 0, width);
38 dstRow = SkTAddOffset<uint32_t>(ptr: dstRow, byteOffset: rowBytes);
39 }
40 break;
41 }
42 case kRGB_565_SkColorType: {
43 uint16_t* dstRow = (uint16_t*) dst;
44 for (int row = 0; row < numRows; row++) {
45 SkOpts::memset16(dstRow, 0, width);
46 dstRow = SkTAddOffset<uint16_t>(ptr: dstRow, byteOffset: rowBytes);
47 }
48 break;
49 }
50 case kGray_8_SkColorType: {
51 uint8_t* dstRow = (uint8_t*) dst;
52 for (int row = 0; row < numRows; row++) {
53 memset(s: dstRow, c: 0, n: width);
54 dstRow = SkTAddOffset<uint8_t>(ptr: dstRow, byteOffset: rowBytes);
55 }
56 break;
57 }
58 case kRGBA_F16_SkColorType: {
59 uint64_t* dstRow = (uint64_t*) dst;
60 for (int row = 0; row < numRows; row++) {
61 SkOpts::memset64(dstRow, 0, width);
62 dstRow = SkTAddOffset<uint64_t>(ptr: dstRow, byteOffset: rowBytes);
63 }
64 break;
65 }
66 default:
67 SkCodecPrintf("Error: Unsupported dst color type for fill(). Doing nothing.\n");
68 SkASSERT(false);
69 break;
70 }
71}
72

source code of flutter_engine/third_party/skia/src/codec/SkSampler.cpp