зеркало из https://github.com/mozilla/gecko-dev.git
154 строки
4.0 KiB
C++
154 строки
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "Logging.h"
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#include "SourceSurfaceSkia.h"
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#include "HelpersSkia.h"
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#include "DrawTargetSkia.h"
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#include "DataSurfaceHelpers.h"
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#include "skia/include/core/SkData.h"
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#include "mozilla/CheckedInt.h"
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namespace mozilla {
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namespace gfx {
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SourceSurfaceSkia::SourceSurfaceSkia()
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: mDrawTarget(nullptr)
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{
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}
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SourceSurfaceSkia::~SourceSurfaceSkia()
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{
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if (mDrawTarget) {
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mDrawTarget->SnapshotDestroyed();
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mDrawTarget = nullptr;
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}
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}
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IntSize
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SourceSurfaceSkia::GetSize() const
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{
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return mSize;
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}
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SurfaceFormat
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SourceSurfaceSkia::GetFormat() const
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{
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return mFormat;
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}
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bool
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SourceSurfaceSkia::InitFromData(unsigned char* aData,
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const IntSize &aSize,
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int32_t aStride,
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SurfaceFormat aFormat)
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{
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SkPixmap pixmap(MakeSkiaImageInfo(aSize, aFormat), aData, aStride);
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mImage = SkImage::MakeRasterCopy(pixmap);
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if (!mImage) {
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return false;
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}
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mSize = aSize;
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mFormat = aFormat;
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mStride = aStride;
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return true;
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}
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bool
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SourceSurfaceSkia::InitFromImage(sk_sp<SkImage> aImage,
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SurfaceFormat aFormat,
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DrawTargetSkia* aOwner)
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{
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if (!aImage) {
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return false;
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}
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mSize = IntSize(aImage->width(), aImage->height());
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// For the raster image case, we want to use the format and stride
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// information that the underlying raster image is using, which is
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// reliable.
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// For the GPU case (for which peekPixels is false), we can't easily
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// figure this information out. It is better to report the originally
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// intended format and stride that we will convert to if this GPU
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// image is ever read back into a raster image.
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SkPixmap pixmap;
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if (aImage->peekPixels(&pixmap)) {
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mFormat =
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aFormat != SurfaceFormat::UNKNOWN ?
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aFormat :
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SkiaColorTypeToGfxFormat(pixmap.colorType(), pixmap.alphaType());
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mStride = pixmap.rowBytes();
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} else if (aFormat != SurfaceFormat::UNKNOWN) {
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mFormat = aFormat;
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SkImageInfo info = MakeSkiaImageInfo(mSize, mFormat);
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mStride = SkAlign4(info.minRowBytes());
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} else {
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return false;
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}
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mImage = aImage;
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if (aOwner) {
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mDrawTarget = aOwner;
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}
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return true;
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}
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uint8_t*
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SourceSurfaceSkia::GetData()
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{
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#ifdef USE_SKIA_GPU
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if (mImage->isTextureBacked()) {
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sk_sp<SkImage> raster;
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CheckedInt<size_t> size = mStride;
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size *= mSize.height;
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if (size.isValid()) {
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if (sk_sp<SkData> data = SkData::MakeUninitialized(size.value())) {
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SkImageInfo info = MakeSkiaImageInfo(mSize, mFormat);
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if (mImage->readPixels(info, data->writable_data(), mStride, 0, 0, SkImage::kDisallow_CachingHint)) {
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raster = SkImage::MakeRasterData(info, data, mStride);
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}
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}
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}
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if (!raster) {
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gfxCriticalError() << "Failed making Skia raster image for GPU surface";
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}
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mImage = raster;
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}
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#endif
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SkPixmap pixmap;
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if (!mImage->peekPixels(&pixmap)) {
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gfxCriticalError() << "Failed accessing pixels for Skia raster image";
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}
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return reinterpret_cast<uint8_t*>(pixmap.writable_addr());
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}
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void
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SourceSurfaceSkia::DrawTargetWillChange()
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{
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if (mDrawTarget) {
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// Raster snapshots do not use Skia's internal copy-on-write mechanism,
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// so we need to do an explicit copy here.
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// GPU snapshots, for which peekPixels is false, will already be dealt
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// with automatically via the internal copy-on-write mechanism, so we
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// don't need to do anything for them here.
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SkPixmap pixmap;
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if (mImage->peekPixels(&pixmap)) {
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mImage = SkImage::MakeRasterCopy(pixmap);
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if (!mImage) {
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gfxCriticalError() << "Failed copying Skia raster snapshot";
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}
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}
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mDrawTarget = nullptr;
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}
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}
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} // namespace gfx
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} // namespace mozilla
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