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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "Logging.h"
#include "SourceSurfaceSkia.h"
#include "HelpersSkia.h"
#include "DrawTargetSkia.h"
#include "DataSurfaceHelpers.h"
#include "skia/include/core/SkData.h"
#include "mozilla/CheckedInt.h"
namespace mozilla {
namespace gfx {
SourceSurfaceSkia::SourceSurfaceSkia()
: mDrawTarget(nullptr)
{
}
SourceSurfaceSkia::~SourceSurfaceSkia()
{
if (mDrawTarget) {
mDrawTarget->SnapshotDestroyed();
mDrawTarget = nullptr;
}
}
IntSize
SourceSurfaceSkia::GetSize() const
{
return mSize;
}
SurfaceFormat
SourceSurfaceSkia::GetFormat() const
{
return mFormat;
}
sk_sp<SkImage>
SourceSurfaceSkia::GetImage(Maybe<MutexAutoLock>* aLock) {
// If we were provided a lock object, we can let the caller access
// a shared SkImage and we know it won't go away while the lock is held.
if (aLock) {
// We are locked, so now we can check mDrawTarget.
// If it's null, then we're not shared and we can unlock eagerly.
if (!mDrawTarget) {
aLock->reset();
}
} else {
// Otherwise we need to call DrawTargetWillChange to ensure we have our
// own copy of the SkImage.
DrawTargetWillChange();
}
sk_sp<SkImage> image = mImage;
return image;
}
static sk_sp<SkData>
MakeSkData(unsigned char* aData, const IntSize& aSize, int32_t aStride)
{
CheckedInt<size_t> size = aStride;
size *= aSize.height;
if (size.isValid()) {
void* mem = sk_malloc_flags(size.value(), 0);
if (mem) {
if (aData) {
memcpy(mem, aData, size.value());
}
return SkData::MakeFromMalloc(mem, size.value());
}
}
return nullptr;
}
bool
SourceSurfaceSkia::InitFromData(unsigned char* aData,
const IntSize &aSize,
int32_t aStride,
SurfaceFormat aFormat)
{
sk_sp<SkData> data = MakeSkData(aData, aSize, aStride);
if (!data) {
return false;
}
SkImageInfo info = MakeSkiaImageInfo(aSize, aFormat);
mImage = SkImage::MakeRasterData(info, data, aStride);
if (!mImage) {
return false;
}
mSize = aSize;
mFormat = aFormat;
mStride = aStride;
return true;
}
bool
SourceSurfaceSkia::InitFromImage(sk_sp<SkImage> aImage,
SurfaceFormat aFormat,
DrawTargetSkia* aOwner)
{
if (!aImage) {
return false;
}
mSize = IntSize(aImage->width(), aImage->height());
// For the raster image case, we want to use the format and stride
// information that the underlying raster image is using, which is
// reliable.
// For the GPU case (for which peekPixels is false), we can't easily
// figure this information out. It is better to report the originally
// intended format and stride that we will convert to if this GPU
// image is ever read back into a raster image.
SkPixmap pixmap;
if (aImage->peekPixels(&pixmap)) {
mFormat =
aFormat != SurfaceFormat::UNKNOWN ?
aFormat :
SkiaColorTypeToGfxFormat(pixmap.colorType(), pixmap.alphaType());
mStride = pixmap.rowBytes();
} else if (aFormat != SurfaceFormat::UNKNOWN) {
mFormat = aFormat;
SkImageInfo info = MakeSkiaImageInfo(mSize, mFormat);
mStride = SkAlign4(info.minRowBytes());
} else {
return false;
}
mImage = aImage;
if (aOwner) {
mDrawTarget = aOwner;
}
return true;
}
uint8_t*
SourceSurfaceSkia::GetData()
{
#ifdef USE_SKIA_GPU
if (mImage->isTextureBacked()) {
sk_sp<SkImage> raster;
if (sk_sp<SkData> data = MakeSkData(nullptr, mSize, mStride)) {
SkImageInfo info = MakeSkiaImageInfo(mSize, mFormat);
if (mImage->readPixels(info, data->writable_data(), mStride, 0, 0, SkImage::kDisallow_CachingHint)) {
raster = SkImage::MakeRasterData(info, data, mStride);
}
}
if (raster) {
mImage = raster;
} else {
gfxCriticalError() << "Failed making Skia raster image for GPU surface";
}
}
#endif
SkPixmap pixmap;
if (!mImage->peekPixels(&pixmap)) {
gfxCriticalError() << "Failed accessing pixels for Skia raster image";
}
return reinterpret_cast<uint8_t*>(pixmap.writable_addr());
}
void
SourceSurfaceSkia::DrawTargetWillChange()
{
if (mDrawTarget) {
// Raster snapshots do not use Skia's internal copy-on-write mechanism,
// so we need to do an explicit copy here.
// GPU snapshots, for which peekPixels is false, will already be dealt
// with automatically via the internal copy-on-write mechanism, so we
// don't need to do anything for them here.
SkPixmap pixmap;
if (mImage->peekPixels(&pixmap)) {
mImage = SkImage::MakeRasterCopy(pixmap);
if (!mImage) {
gfxCriticalError() << "Failed copying Skia raster snapshot";
}
}
mDrawTarget = nullptr;
}
}
} // namespace gfx
} // namespace mozilla
|
