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/* -*- 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;
}
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
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