mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-11 02:56:06 +00:00
1243 lines
39 KiB
C++
1243 lines
39 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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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 "mozilla/dom/ImageBitmap.h"
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#include "mozilla/CheckedInt.h"
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#include "mozilla/dom/ImageBitmapBinding.h"
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#include "mozilla/dom/Promise.h"
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#include "mozilla/dom/StructuredCloneTags.h"
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#include "mozilla/dom/WorkerPrivate.h"
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#include "mozilla/dom/WorkerRunnable.h"
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#include "mozilla/gfx/2D.h"
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#include "imgTools.h"
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#include "libyuv.h"
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#include "nsLayoutUtils.h"
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using namespace mozilla::gfx;
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using namespace mozilla::layers;
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namespace mozilla {
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namespace dom {
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using namespace workers;
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(ImageBitmap, mParent)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(ImageBitmap)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(ImageBitmap)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ImageBitmap)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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/*
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* If either aRect.width or aRect.height are negative, then return a new IntRect
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* which represents the same rectangle as the aRect does but with positive width
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* and height.
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*/
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static IntRect
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FixUpNegativeDimension(const IntRect& aRect, ErrorResult& aRv)
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{
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gfx::IntRect rect = aRect;
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// fix up negative dimensions
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if (rect.width < 0) {
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CheckedInt32 checkedX = CheckedInt32(rect.x) + rect.width;
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if (!checkedX.isValid()) {
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return rect;
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}
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rect.x = checkedX.value();
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rect.width = -(rect.width);
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}
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if (rect.height < 0) {
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CheckedInt32 checkedY = CheckedInt32(rect.y) + rect.height;
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if (!checkedY.isValid()) {
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return rect;
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}
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rect.y = checkedY.value();
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rect.height = -(rect.height);
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}
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return rect;
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}
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/*
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* This helper function copies the data of the given DataSourceSurface,
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* _aSurface_, in the given area, _aCropRect_, into a new DataSourceSurface.
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* This might return null if it can not create a new SourceSurface or it cannot
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* read data from the given _aSurface_.
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*
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* Warning: Even though the area of _aCropRect_ is just the same as the size of
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* _aSurface_, this function still copy data into a new
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* DataSourceSurface.
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*/
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static already_AddRefed<DataSourceSurface>
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CropAndCopyDataSourceSurface(DataSourceSurface* aSurface, const IntRect& aCropRect)
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{
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MOZ_ASSERT(aSurface);
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// Check the aCropRect
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ErrorResult error;
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const IntRect positiveCropRect = FixUpNegativeDimension(aCropRect, error);
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if (NS_WARN_IF(error.Failed())) {
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return nullptr;
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}
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// Calculate the size of the new SourceSurface.
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// We cannot keep using aSurface->GetFormat() to create new DataSourceSurface,
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// since it might be SurfaceFormat::B8G8R8X8 which does not handle opacity,
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// however the specification explicitly define that "If any of the pixels on
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// this rectangle are outside the area where the input bitmap was placed, then
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// they will be transparent black in output."
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// So, instead, we force the output format to be SurfaceFormat::B8G8R8A8.
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const SurfaceFormat format = SurfaceFormat::B8G8R8A8;
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const int bytesPerPixel = BytesPerPixel(format);
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const IntSize dstSize = IntSize(positiveCropRect.width,
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positiveCropRect.height);
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const uint32_t dstStride = dstSize.width * bytesPerPixel;
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// Create a new SourceSurface.
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RefPtr<DataSourceSurface> dstDataSurface =
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Factory::CreateDataSourceSurfaceWithStride(dstSize, format, dstStride, true);
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if (NS_WARN_IF(!dstDataSurface)) {
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return nullptr;
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}
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// Only do copying and cropping when the positiveCropRect intersects with
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// the size of aSurface.
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const IntRect surfRect(IntPoint(0, 0), aSurface->GetSize());
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if (surfRect.Intersects(positiveCropRect)) {
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const IntRect surfPortion = surfRect.Intersect(positiveCropRect);
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const IntPoint dest(std::max(0, surfPortion.X() - positiveCropRect.X()),
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std::max(0, surfPortion.Y() - positiveCropRect.Y()));
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// Copy the raw data into the newly created DataSourceSurface.
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DataSourceSurface::ScopedMap srcMap(aSurface, DataSourceSurface::READ);
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DataSourceSurface::ScopedMap dstMap(dstDataSurface, DataSourceSurface::WRITE);
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if (NS_WARN_IF(!srcMap.IsMapped()) ||
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NS_WARN_IF(!dstMap.IsMapped())) {
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return nullptr;
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}
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uint8_t* srcBufferPtr = srcMap.GetData() + surfPortion.y * srcMap.GetStride()
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+ surfPortion.x * bytesPerPixel;
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uint8_t* dstBufferPtr = dstMap.GetData() + dest.y * dstMap.GetStride()
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+ dest.x * bytesPerPixel;
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CheckedInt<uint32_t> copiedBytesPerRaw =
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CheckedInt<uint32_t>(surfPortion.width) * bytesPerPixel;
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if (MOZ_UNLIKELY(!copiedBytesPerRaw.isValid())) {
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return nullptr;
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}
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for (int i = 0; i < surfPortion.height; ++i) {
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memcpy(dstBufferPtr, srcBufferPtr, copiedBytesPerRaw.value());
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srcBufferPtr += srcMap.GetStride();
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dstBufferPtr += dstMap.GetStride();
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}
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}
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return dstDataSurface.forget();
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}
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/*
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* Encapsulate the given _aSurface_ into a layers::CairoImage.
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*/
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static already_AddRefed<layers::Image>
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CreateImageFromSurface(SourceSurface* aSurface)
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{
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MOZ_ASSERT(aSurface);
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RefPtr<layers::CairoImage> image =
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new layers::CairoImage(aSurface->GetSize(), aSurface);
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return image.forget();
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}
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/*
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* CreateImageFromRawData(), CreateSurfaceFromRawData() and
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* CreateImageFromRawDataInMainThreadSyncTask are helpers for
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* create-from-ImageData case
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*/
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static already_AddRefed<SourceSurface>
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CreateSurfaceFromRawData(const gfx::IntSize& aSize,
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uint32_t aStride,
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gfx::SurfaceFormat aFormat,
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uint8_t* aBuffer,
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uint32_t aBufferLength,
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const Maybe<IntRect>& aCropRect)
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{
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MOZ_ASSERT(!aSize.IsEmpty());
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MOZ_ASSERT(aBuffer);
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// Wrap the source buffer into a SourceSurface.
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RefPtr<DataSourceSurface> dataSurface =
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Factory::CreateWrappingDataSourceSurface(aBuffer, aStride, aSize, aFormat);
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if (NS_WARN_IF(!dataSurface)) {
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return nullptr;
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}
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// The temporary cropRect variable is equal to the size of source buffer if we
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// do not need to crop, or it equals to the given cropping size.
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const IntRect cropRect = aCropRect.valueOr(IntRect(0, 0, aSize.width, aSize.height));
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// Copy the source buffer in the _cropRect_ area into a new SourceSurface.
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RefPtr<DataSourceSurface> result = CropAndCopyDataSourceSurface(dataSurface, cropRect);
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if (NS_WARN_IF(!result)) {
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return nullptr;
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}
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return result.forget();
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}
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static already_AddRefed<layers::Image>
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CreateImageFromRawData(const gfx::IntSize& aSize,
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uint32_t aStride,
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gfx::SurfaceFormat aFormat,
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uint8_t* aBuffer,
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uint32_t aBufferLength,
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const Maybe<IntRect>& aCropRect)
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{
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MOZ_ASSERT(NS_IsMainThread());
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// Copy and crop the source buffer into a SourceSurface.
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RefPtr<SourceSurface> rgbaSurface =
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CreateSurfaceFromRawData(aSize, aStride, aFormat,
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aBuffer, aBufferLength,
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aCropRect);
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if (NS_WARN_IF(!rgbaSurface)) {
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return nullptr;
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}
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// Convert RGBA to BGRA
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RefPtr<DataSourceSurface> rgbaDataSurface = rgbaSurface->GetDataSurface();
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RefPtr<DataSourceSurface> bgraDataSurface =
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Factory::CreateDataSourceSurfaceWithStride(rgbaDataSurface->GetSize(),
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SurfaceFormat::B8G8R8A8,
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rgbaDataSurface->Stride());
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DataSourceSurface::MappedSurface rgbaMap;
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DataSourceSurface::MappedSurface bgraMap;
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if (NS_WARN_IF(!rgbaDataSurface->Map(DataSourceSurface::MapType::READ, &rgbaMap)) ||
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NS_WARN_IF(!bgraDataSurface->Map(DataSourceSurface::MapType::WRITE, &bgraMap))) {
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return nullptr;
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}
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libyuv::ABGRToARGB(rgbaMap.mData, rgbaMap.mStride,
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bgraMap.mData, bgraMap.mStride,
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bgraDataSurface->GetSize().width,
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bgraDataSurface->GetSize().height);
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rgbaDataSurface->Unmap();
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bgraDataSurface->Unmap();
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// Create an Image from the BGRA SourceSurface.
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RefPtr<layers::Image> image = CreateImageFromSurface(bgraDataSurface);
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if (NS_WARN_IF(!image)) {
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return nullptr;
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}
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return image.forget();
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}
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/*
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* This is a synchronous task.
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* This class is used to create a layers::CairoImage from raw data in the main
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* thread. While creating an ImageBitmap from an ImageData, we need to create
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* a SouceSurface from the ImageData's raw data and then set the SourceSurface
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* into a layers::CairoImage. However, the layers::CairoImage asserts the
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* setting operation in the main thread, so if we are going to create an
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* ImageBitmap from an ImageData off the main thread, we post an event to the
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* main thread to create a layers::CairoImage from an ImageData's raw data.
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*/
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class CreateImageFromRawDataInMainThreadSyncTask final :
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public WorkerMainThreadRunnable
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{
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public:
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CreateImageFromRawDataInMainThreadSyncTask(uint8_t* aBuffer,
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uint32_t aBufferLength,
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uint32_t aStride,
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gfx::SurfaceFormat aFormat,
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const gfx::IntSize& aSize,
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const Maybe<IntRect>& aCropRect,
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layers::Image** aImage)
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: WorkerMainThreadRunnable(GetCurrentThreadWorkerPrivate())
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, mImage(aImage)
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, mBuffer(aBuffer)
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, mBufferLength(aBufferLength)
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, mStride(aStride)
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, mFormat(aFormat)
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, mSize(aSize)
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, mCropRect(aCropRect)
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{
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MOZ_ASSERT(!(*aImage), "Don't pass an existing Image into CreateImageFromRawDataInMainThreadSyncTask.");
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}
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bool MainThreadRun() override
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{
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RefPtr<layers::Image> image =
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CreateImageFromRawData(mSize, mStride, mFormat,
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mBuffer, mBufferLength,
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mCropRect);
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if (NS_WARN_IF(!image)) {
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return false;
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}
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image.forget(mImage);
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return true;
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}
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private:
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layers::Image** mImage;
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uint8_t* mBuffer;
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uint32_t mBufferLength;
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uint32_t mStride;
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gfx::SurfaceFormat mFormat;
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gfx::IntSize mSize;
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const Maybe<IntRect>& mCropRect;
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};
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static bool
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CheckSecurityForHTMLElements(bool aIsWriteOnly, bool aCORSUsed, nsIPrincipal* aPrincipal)
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{
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MOZ_ASSERT(aPrincipal);
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if (aIsWriteOnly) {
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return false;
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}
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if (!aCORSUsed) {
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nsIGlobalObject* incumbentSettingsObject = GetIncumbentGlobal();
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if (NS_WARN_IF(!incumbentSettingsObject)) {
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return false;
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}
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nsIPrincipal* principal = incumbentSettingsObject->PrincipalOrNull();
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if (NS_WARN_IF(!principal) || !(principal->Subsumes(aPrincipal))) {
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return false;
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}
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}
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return true;
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}
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static bool
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CheckSecurityForHTMLElements(const nsLayoutUtils::SurfaceFromElementResult& aRes)
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{
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return CheckSecurityForHTMLElements(aRes.mIsWriteOnly, aRes.mCORSUsed, aRes.mPrincipal);
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}
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/*
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* A wrapper to the nsLayoutUtils::SurfaceFromElement() function followed by the
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* security checking.
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*/
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template<class HTMLElementType>
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static already_AddRefed<SourceSurface>
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GetSurfaceFromElement(nsIGlobalObject* aGlobal, HTMLElementType& aElement, ErrorResult& aRv)
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{
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nsLayoutUtils::SurfaceFromElementResult res =
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nsLayoutUtils::SurfaceFromElement(&aElement, nsLayoutUtils::SFE_WANT_FIRST_FRAME);
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// check origin-clean
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if (!CheckSecurityForHTMLElements(res)) {
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aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
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return nullptr;
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}
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RefPtr<SourceSurface> surface = res.GetSourceSurface();
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if (NS_WARN_IF(!surface)) {
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aRv.Throw(NS_ERROR_NOT_AVAILABLE);
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return nullptr;
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}
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return surface.forget();
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}
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/*
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* The specification doesn't allow to create an ImegeBitmap from a vector image.
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* This function is used to check if the given HTMLImageElement contains a
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* raster image.
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*/
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static bool
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HasRasterImage(HTMLImageElement& aImageEl)
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{
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nsresult rv;
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nsCOMPtr<imgIRequest> imgRequest;
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rv = aImageEl.GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
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getter_AddRefs(imgRequest));
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if (NS_SUCCEEDED(rv) && imgRequest) {
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nsCOMPtr<imgIContainer> imgContainer;
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rv = imgRequest->GetImage(getter_AddRefs(imgContainer));
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if (NS_SUCCEEDED(rv) && imgContainer &&
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imgContainer->GetType() == imgIContainer::TYPE_RASTER) {
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return true;
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}
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}
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return false;
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}
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ImageBitmap::ImageBitmap(nsIGlobalObject* aGlobal, layers::Image* aData)
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: mParent(aGlobal)
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, mData(aData)
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, mSurface(nullptr)
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, mPictureRect(0, 0, aData->GetSize().width, aData->GetSize().height)
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{
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MOZ_ASSERT(aData, "aData is null in ImageBitmap constructor.");
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}
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ImageBitmap::~ImageBitmap()
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{
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}
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JSObject*
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ImageBitmap::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return ImageBitmapBinding::Wrap(aCx, this, aGivenProto);
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}
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void
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ImageBitmap::SetPictureRect(const IntRect& aRect, ErrorResult& aRv)
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{
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mPictureRect = FixUpNegativeDimension(aRect, aRv);
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}
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already_AddRefed<SourceSurface>
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ImageBitmap::PrepareForDrawTarget(gfx::DrawTarget* aTarget)
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{
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MOZ_ASSERT(aTarget);
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if (!mSurface) {
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mSurface = mData->GetAsSourceSurface();
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}
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if (!mSurface) {
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return nullptr;
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}
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RefPtr<DrawTarget> target = aTarget;
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IntRect surfRect(0, 0, mSurface->GetSize().width, mSurface->GetSize().height);
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// Check if we still need to crop our surface
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if (!mPictureRect.IsEqualEdges(surfRect)) {
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IntRect surfPortion = surfRect.Intersect(mPictureRect);
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// the crop lies entirely outside the surface area, nothing to draw
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if (surfPortion.IsEmpty()) {
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mSurface = nullptr;
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RefPtr<gfx::SourceSurface> surface(mSurface);
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return surface.forget();
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}
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IntPoint dest(std::max(0, surfPortion.X() - mPictureRect.X()),
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std::max(0, surfPortion.Y() - mPictureRect.Y()));
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// We must initialize this target with mPictureRect.Size() because the
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// specification states that if the cropping area is given, then return an
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// ImageBitmap with the size equals to the cropping area.
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target = target->CreateSimilarDrawTarget(mPictureRect.Size(),
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target->GetFormat());
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if (!target) {
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mSurface = nullptr;
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RefPtr<gfx::SourceSurface> surface(mSurface);
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return surface.forget();
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}
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// We need to fall back to generic copying and cropping for the Windows8.1,
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// D2D1 backend.
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// In the Windows8.1 D2D1 backend, it might trigger "partial upload" from a
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// non-SourceSurfaceD2D1 surface to a D2D1Image in the following
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// CopySurface() step. However, the "partial upload" only supports uploading
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// a rectangle starts from the upper-left point, which means it cannot
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// upload an arbitrary part of the source surface and this causes problems
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// if the mPictureRect is not starts from the upper-left point.
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if (target->GetBackendType() == BackendType::DIRECT2D1_1 &&
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mSurface->GetType() != SurfaceType::D2D1_1_IMAGE) {
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RefPtr<DataSourceSurface> dataSurface = mSurface->GetDataSurface();
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if (NS_WARN_IF(!dataSurface)) {
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mSurface = nullptr;
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RefPtr<gfx::SourceSurface> surface(mSurface);
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return surface.forget();
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}
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mSurface = CropAndCopyDataSourceSurface(dataSurface, mPictureRect);
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} else {
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target->CopySurface(mSurface, surfPortion, dest);
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mSurface = target->Snapshot();
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}
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// Make mCropRect match new surface we've cropped to
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mPictureRect.MoveTo(0, 0);
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}
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|
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// Replace our surface with one optimized for the target we're about to draw
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// to, under the assumption it'll likely be drawn again to that target.
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|
// This call should be a no-op for already-optimized surfaces
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mSurface = target->OptimizeSourceSurface(mSurface);
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RefPtr<gfx::SourceSurface> surface(mSurface);
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return surface.forget();
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}
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|
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/* static */ already_AddRefed<ImageBitmap>
|
|
ImageBitmap::CreateInternal(nsIGlobalObject* aGlobal, HTMLImageElement& aImageEl,
|
|
const Maybe<IntRect>& aCropRect, ErrorResult& aRv)
|
|
{
|
|
// Check if the image element is completely available or not.
|
|
if (!aImageEl.Complete()) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
// Check if the image element is a bitmap (e.g. it's a vector graphic) or not.
|
|
if (!HasRasterImage(aImageEl)) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
// Get the SourceSurface out from the image element and then do security
|
|
// checking.
|
|
RefPtr<SourceSurface> surface = GetSurfaceFromElement(aGlobal, aImageEl, aRv);
|
|
|
|
if (NS_WARN_IF(aRv.Failed())) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Create ImageBitmap.
|
|
RefPtr<layers::Image> data = CreateImageFromSurface(surface);
|
|
|
|
if (NS_WARN_IF(!data)) {
|
|
aRv.Throw(NS_ERROR_NOT_AVAILABLE);
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<ImageBitmap> ret = new ImageBitmap(aGlobal, data);
|
|
|
|
// Set the picture rectangle.
|
|
if (ret && aCropRect.isSome()) {
|
|
ret->SetPictureRect(aCropRect.ref(), aRv);
|
|
}
|
|
|
|
return ret.forget();
|
|
}
|
|
|
|
/* static */ already_AddRefed<ImageBitmap>
|
|
ImageBitmap::CreateInternal(nsIGlobalObject* aGlobal, HTMLVideoElement& aVideoEl,
|
|
const Maybe<IntRect>& aCropRect, ErrorResult& aRv)
|
|
{
|
|
// Check network state.
|
|
if (aVideoEl.NetworkState() == HTMLMediaElement::NETWORK_EMPTY) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
// Check ready state.
|
|
// Cannot be HTMLMediaElement::HAVE_NOTHING or HTMLMediaElement::HAVE_METADATA.
|
|
if (aVideoEl.ReadyState() <= HTMLMediaElement::HAVE_METADATA) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
// Check security.
|
|
nsCOMPtr<nsIPrincipal> principal = aVideoEl.GetCurrentPrincipal();
|
|
bool CORSUsed = aVideoEl.GetCORSMode() != CORS_NONE;
|
|
if (!CheckSecurityForHTMLElements(false, CORSUsed, principal)) {
|
|
aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
// Create ImageBitmap.
|
|
ImageContainer *container = aVideoEl.GetImageContainer();
|
|
|
|
if (!container) {
|
|
aRv.Throw(NS_ERROR_NOT_AVAILABLE);
|
|
return nullptr;
|
|
}
|
|
|
|
AutoLockImage lockImage(container);
|
|
layers::Image* data = lockImage.GetImage();
|
|
RefPtr<ImageBitmap> ret = new ImageBitmap(aGlobal, data);
|
|
|
|
// Set the picture rectangle.
|
|
if (ret && aCropRect.isSome()) {
|
|
ret->SetPictureRect(aCropRect.ref(), aRv);
|
|
}
|
|
|
|
return ret.forget();
|
|
}
|
|
|
|
/* static */ already_AddRefed<ImageBitmap>
|
|
ImageBitmap::CreateInternal(nsIGlobalObject* aGlobal, HTMLCanvasElement& aCanvasEl,
|
|
const Maybe<IntRect>& aCropRect, ErrorResult& aRv)
|
|
{
|
|
if (aCanvasEl.Width() == 0 || aCanvasEl.Height() == 0) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<SourceSurface> surface = GetSurfaceFromElement(aGlobal, aCanvasEl, aRv);
|
|
|
|
if (NS_WARN_IF(aRv.Failed())) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Crop the source surface if needed.
|
|
RefPtr<SourceSurface> croppedSurface;
|
|
IntRect cropRect = aCropRect.valueOr(IntRect());
|
|
|
|
// If the HTMLCanvasElement's rendering context is WebGL, then the snapshot
|
|
// we got from the HTMLCanvasElement is a DataSourceSurface which is a copy
|
|
// of the rendering context. We handle cropping in this case.
|
|
if ((aCanvasEl.GetCurrentContextType() == CanvasContextType::WebGL1 ||
|
|
aCanvasEl.GetCurrentContextType() == CanvasContextType::WebGL2) &&
|
|
aCropRect.isSome()) {
|
|
// The _surface_ must be a DataSourceSurface.
|
|
MOZ_ASSERT(surface->GetType() == SurfaceType::DATA,
|
|
"The snapshot SourceSurface from WebGL rendering contest is not \
|
|
DataSourceSurface.");
|
|
RefPtr<DataSourceSurface> dataSurface = surface->GetDataSurface();
|
|
croppedSurface = CropAndCopyDataSourceSurface(dataSurface, cropRect);
|
|
cropRect.MoveTo(0, 0);
|
|
}
|
|
else {
|
|
croppedSurface = surface;
|
|
}
|
|
|
|
if (NS_WARN_IF(!croppedSurface)) {
|
|
aRv.Throw(NS_ERROR_NOT_AVAILABLE);
|
|
return nullptr;
|
|
}
|
|
|
|
// Create an Image from the SourceSurface.
|
|
RefPtr<layers::Image> data = CreateImageFromSurface(croppedSurface);
|
|
|
|
if (NS_WARN_IF(!data)) {
|
|
aRv.Throw(NS_ERROR_NOT_AVAILABLE);
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<ImageBitmap> ret = new ImageBitmap(aGlobal, data);
|
|
|
|
// Set the picture rectangle.
|
|
if (ret && aCropRect.isSome()) {
|
|
ret->SetPictureRect(cropRect, aRv);
|
|
}
|
|
|
|
return ret.forget();
|
|
}
|
|
|
|
/* static */ already_AddRefed<ImageBitmap>
|
|
ImageBitmap::CreateInternal(nsIGlobalObject* aGlobal, ImageData& aImageData,
|
|
const Maybe<IntRect>& aCropRect, ErrorResult& aRv)
|
|
{
|
|
// Copy data into SourceSurface.
|
|
dom::Uint8ClampedArray array;
|
|
DebugOnly<bool> inited = array.Init(aImageData.GetDataObject());
|
|
MOZ_ASSERT(inited);
|
|
|
|
array.ComputeLengthAndData();
|
|
const SurfaceFormat FORMAT = SurfaceFormat::R8G8B8A8;
|
|
const uint32_t BYTES_PER_PIXEL = BytesPerPixel(FORMAT);
|
|
const uint32_t imageWidth = aImageData.Width();
|
|
const uint32_t imageHeight = aImageData.Height();
|
|
const uint32_t imageStride = imageWidth * BYTES_PER_PIXEL;
|
|
const uint32_t dataLength = array.Length();
|
|
const gfx::IntSize imageSize(imageWidth, imageHeight);
|
|
|
|
// Check the ImageData is neutered or not.
|
|
if (imageWidth == 0 || imageHeight == 0 ||
|
|
(imageWidth * imageHeight * BYTES_PER_PIXEL) != dataLength) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
// Create and Crop the raw data into a layers::Image
|
|
RefPtr<layers::Image> data;
|
|
if (NS_IsMainThread()) {
|
|
data = CreateImageFromRawData(imageSize, imageStride, FORMAT,
|
|
array.Data(), dataLength,
|
|
aCropRect);
|
|
} else {
|
|
RefPtr<CreateImageFromRawDataInMainThreadSyncTask> task
|
|
= new CreateImageFromRawDataInMainThreadSyncTask(array.Data(),
|
|
dataLength,
|
|
imageStride,
|
|
FORMAT,
|
|
imageSize,
|
|
aCropRect,
|
|
getter_AddRefs(data));
|
|
task->Dispatch(aRv);
|
|
}
|
|
|
|
if (NS_WARN_IF(!data)) {
|
|
aRv.Throw(NS_ERROR_NOT_AVAILABLE);
|
|
return nullptr;
|
|
}
|
|
|
|
// Create an ImageBimtap.
|
|
RefPtr<ImageBitmap> ret = new ImageBitmap(aGlobal, data);
|
|
|
|
// The cropping information has been handled in the CreateImageFromRawData()
|
|
// function.
|
|
|
|
return ret.forget();
|
|
}
|
|
|
|
/* static */ already_AddRefed<ImageBitmap>
|
|
ImageBitmap::CreateInternal(nsIGlobalObject* aGlobal, CanvasRenderingContext2D& aCanvasCtx,
|
|
const Maybe<IntRect>& aCropRect, ErrorResult& aRv)
|
|
{
|
|
// Check origin-clean.
|
|
if (aCanvasCtx.GetCanvas()->IsWriteOnly()) {
|
|
aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<SourceSurface> surface = aCanvasCtx.GetSurfaceSnapshot();
|
|
|
|
if (NS_WARN_IF(!surface)) {
|
|
aRv.Throw(NS_ERROR_NOT_AVAILABLE);
|
|
return nullptr;
|
|
}
|
|
|
|
const IntSize surfaceSize = surface->GetSize();
|
|
if (surfaceSize.width == 0 || surfaceSize.height == 0) {
|
|
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<layers::Image> data = CreateImageFromSurface(surface);
|
|
|
|
if (NS_WARN_IF(!data)) {
|
|
aRv.Throw(NS_ERROR_NOT_AVAILABLE);
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<ImageBitmap> ret = new ImageBitmap(aGlobal, data);
|
|
|
|
// Set the picture rectangle.
|
|
if (ret && aCropRect.isSome()) {
|
|
ret->SetPictureRect(aCropRect.ref(), aRv);
|
|
}
|
|
|
|
return ret.forget();
|
|
}
|
|
|
|
/* static */ already_AddRefed<ImageBitmap>
|
|
ImageBitmap::CreateInternal(nsIGlobalObject* aGlobal, ImageBitmap& aImageBitmap,
|
|
const Maybe<IntRect>& aCropRect, ErrorResult& aRv)
|
|
{
|
|
if (!aImageBitmap.mData) {
|
|
aRv.Throw(NS_ERROR_NOT_AVAILABLE);
|
|
return nullptr;
|
|
}
|
|
|
|
RefPtr<layers::Image> data = aImageBitmap.mData;
|
|
RefPtr<ImageBitmap> ret = new ImageBitmap(aGlobal, data);
|
|
|
|
// Set the picture rectangle.
|
|
if (ret && aCropRect.isSome()) {
|
|
ret->SetPictureRect(aCropRect.ref(), aRv);
|
|
}
|
|
|
|
return ret.forget();
|
|
}
|
|
|
|
class FulfillImageBitmapPromise
|
|
{
|
|
protected:
|
|
FulfillImageBitmapPromise(Promise* aPromise, ImageBitmap* aImageBitmap)
|
|
: mPromise(aPromise)
|
|
, mImageBitmap(aImageBitmap)
|
|
{
|
|
MOZ_ASSERT(aPromise);
|
|
}
|
|
|
|
void DoFulfillImageBitmapPromise()
|
|
{
|
|
mPromise->MaybeResolve(mImageBitmap);
|
|
}
|
|
|
|
private:
|
|
RefPtr<Promise> mPromise;
|
|
RefPtr<ImageBitmap> mImageBitmap;
|
|
};
|
|
|
|
class FulfillImageBitmapPromiseTask final : public nsRunnable,
|
|
public FulfillImageBitmapPromise
|
|
{
|
|
public:
|
|
FulfillImageBitmapPromiseTask(Promise* aPromise, ImageBitmap* aImageBitmap)
|
|
: FulfillImageBitmapPromise(aPromise, aImageBitmap)
|
|
{
|
|
}
|
|
|
|
NS_IMETHOD Run() override
|
|
{
|
|
DoFulfillImageBitmapPromise();
|
|
return NS_OK;
|
|
}
|
|
};
|
|
|
|
class FulfillImageBitmapPromiseWorkerTask final : public WorkerSameThreadRunnable,
|
|
public FulfillImageBitmapPromise
|
|
{
|
|
public:
|
|
FulfillImageBitmapPromiseWorkerTask(Promise* aPromise, ImageBitmap* aImageBitmap)
|
|
: WorkerSameThreadRunnable(GetCurrentThreadWorkerPrivate()),
|
|
FulfillImageBitmapPromise(aPromise, aImageBitmap)
|
|
{
|
|
}
|
|
|
|
bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
|
|
{
|
|
DoFulfillImageBitmapPromise();
|
|
return true;
|
|
}
|
|
};
|
|
|
|
static void
|
|
AsyncFulfillImageBitmapPromise(Promise* aPromise, ImageBitmap* aImageBitmap)
|
|
{
|
|
if (NS_IsMainThread()) {
|
|
nsCOMPtr<nsIRunnable> task =
|
|
new FulfillImageBitmapPromiseTask(aPromise, aImageBitmap);
|
|
NS_DispatchToCurrentThread(task); // Actually, to the main-thread.
|
|
} else {
|
|
RefPtr<FulfillImageBitmapPromiseWorkerTask> task =
|
|
new FulfillImageBitmapPromiseWorkerTask(aPromise, aImageBitmap);
|
|
task->Dispatch(GetCurrentThreadWorkerPrivate()->GetJSContext()); // Actually, to the current worker-thread.
|
|
}
|
|
}
|
|
|
|
static already_AddRefed<SourceSurface>
|
|
DecodeBlob(Blob& aBlob)
|
|
{
|
|
// Get the internal stream of the blob.
|
|
nsCOMPtr<nsIInputStream> stream;
|
|
ErrorResult error;
|
|
aBlob.Impl()->GetInternalStream(getter_AddRefs(stream), error);
|
|
if (NS_WARN_IF(error.Failed())) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Get the MIME type string of the blob.
|
|
// The type will be checked in the DecodeImage() method.
|
|
nsAutoString mimeTypeUTF16;
|
|
aBlob.GetType(mimeTypeUTF16);
|
|
|
|
// Get the Component object.
|
|
nsCOMPtr<imgITools> imgtool = do_GetService(NS_IMGTOOLS_CID);
|
|
if (NS_WARN_IF(!imgtool)) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Decode image.
|
|
NS_ConvertUTF16toUTF8 mimeTypeUTF8(mimeTypeUTF16); // NS_ConvertUTF16toUTF8 ---|> nsAutoCString
|
|
nsCOMPtr<imgIContainer> imgContainer;
|
|
nsresult rv = imgtool->DecodeImage(stream, mimeTypeUTF8, getter_AddRefs(imgContainer));
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Get the surface out.
|
|
uint32_t frameFlags = imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_WANT_DATA_SURFACE;
|
|
uint32_t whichFrame = imgIContainer::FRAME_FIRST;
|
|
RefPtr<SourceSurface> surface = imgContainer->GetFrame(whichFrame, frameFlags);
|
|
|
|
if (NS_WARN_IF(!surface)) {
|
|
return nullptr;
|
|
}
|
|
|
|
return surface.forget();
|
|
}
|
|
|
|
static already_AddRefed<layers::Image>
|
|
DecodeAndCropBlob(Blob& aBlob, Maybe<IntRect>& aCropRect)
|
|
{
|
|
// Decode the blob into a SourceSurface.
|
|
RefPtr<SourceSurface> surface = DecodeBlob(aBlob);
|
|
|
|
if (NS_WARN_IF(!surface)) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Crop the source surface if needed.
|
|
RefPtr<SourceSurface> croppedSurface = surface;
|
|
|
|
if (aCropRect.isSome()) {
|
|
// The blob is just decoded into a RasterImage and not optimized yet, so the
|
|
// _surface_ we get is a DataSourceSurface which wraps the RasterImage's
|
|
// raw buffer.
|
|
//
|
|
// The _surface_ might already be optimized so that its type is not
|
|
// SurfaceType::DATA. However, we could keep using the generic cropping and
|
|
// copying since the decoded buffer is only used in this ImageBitmap so we
|
|
// should crop it to save memory usage.
|
|
//
|
|
// TODO: Bug1189632 is going to refactor this create-from-blob part to
|
|
// decode the blob off the main thread. Re-check if we should do
|
|
// cropping at this moment again there.
|
|
RefPtr<DataSourceSurface> dataSurface = surface->GetDataSurface();
|
|
croppedSurface = CropAndCopyDataSourceSurface(dataSurface, aCropRect.ref());
|
|
aCropRect->MoveTo(0, 0);
|
|
}
|
|
|
|
if (NS_WARN_IF(!croppedSurface)) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Create an Image from the source surface.
|
|
RefPtr<layers::Image> image = CreateImageFromSurface(croppedSurface);
|
|
|
|
if (NS_WARN_IF(!image)) {
|
|
return nullptr;
|
|
}
|
|
|
|
return image.forget();
|
|
}
|
|
|
|
class CreateImageBitmapFromBlob
|
|
{
|
|
protected:
|
|
CreateImageBitmapFromBlob(Promise* aPromise,
|
|
nsIGlobalObject* aGlobal,
|
|
Blob& aBlob,
|
|
const Maybe<IntRect>& aCropRect)
|
|
: mPromise(aPromise),
|
|
mGlobalObject(aGlobal),
|
|
mBlob(&aBlob),
|
|
mCropRect(aCropRect)
|
|
{
|
|
}
|
|
|
|
virtual ~CreateImageBitmapFromBlob()
|
|
{
|
|
}
|
|
|
|
// Returns true on success, false on failure.
|
|
bool DoCreateImageBitmapFromBlob()
|
|
{
|
|
RefPtr<ImageBitmap> imageBitmap = CreateImageBitmap();
|
|
|
|
// handle errors while creating ImageBitmap
|
|
// (1) error occurs during reading of the object
|
|
// (2) the image data is not in a supported file format
|
|
// (3) the image data is corrupted
|
|
// All these three cases should reject promise with null value
|
|
if (!imageBitmap) {
|
|
return false;
|
|
}
|
|
|
|
if (imageBitmap && mCropRect.isSome()) {
|
|
ErrorResult rv;
|
|
imageBitmap->SetPictureRect(mCropRect.ref(), rv);
|
|
|
|
if (rv.Failed()) {
|
|
mPromise->MaybeReject(rv);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
mPromise->MaybeResolve(imageBitmap);
|
|
return true;
|
|
}
|
|
|
|
// Will return null on failure. In that case, mPromise will already
|
|
// be rejected with the right thing.
|
|
virtual already_AddRefed<ImageBitmap> CreateImageBitmap() = 0;
|
|
|
|
RefPtr<Promise> mPromise;
|
|
nsCOMPtr<nsIGlobalObject> mGlobalObject;
|
|
RefPtr<mozilla::dom::Blob> mBlob;
|
|
Maybe<IntRect> mCropRect;
|
|
};
|
|
|
|
class CreateImageBitmapFromBlobTask final : public nsRunnable,
|
|
public CreateImageBitmapFromBlob
|
|
{
|
|
public:
|
|
CreateImageBitmapFromBlobTask(Promise* aPromise,
|
|
nsIGlobalObject* aGlobal,
|
|
Blob& aBlob,
|
|
const Maybe<IntRect>& aCropRect)
|
|
:CreateImageBitmapFromBlob(aPromise, aGlobal, aBlob, aCropRect)
|
|
{
|
|
}
|
|
|
|
NS_IMETHOD Run() override
|
|
{
|
|
DoCreateImageBitmapFromBlob();
|
|
return NS_OK;
|
|
}
|
|
|
|
private:
|
|
already_AddRefed<ImageBitmap> CreateImageBitmap() override
|
|
{
|
|
RefPtr<layers::Image> data = DecodeAndCropBlob(*mBlob, mCropRect);
|
|
|
|
if (NS_WARN_IF(!data)) {
|
|
mPromise->MaybeReject(NS_ERROR_NOT_AVAILABLE);
|
|
return nullptr;
|
|
}
|
|
|
|
// Create ImageBitmap object.
|
|
RefPtr<ImageBitmap> imageBitmap = new ImageBitmap(mGlobalObject, data);
|
|
return imageBitmap.forget();
|
|
}
|
|
};
|
|
|
|
class CreateImageBitmapFromBlobWorkerTask final : public WorkerSameThreadRunnable,
|
|
public CreateImageBitmapFromBlob
|
|
{
|
|
// This is a synchronous task.
|
|
class DecodeBlobInMainThreadSyncTask final : public WorkerMainThreadRunnable
|
|
{
|
|
public:
|
|
DecodeBlobInMainThreadSyncTask(WorkerPrivate* aWorkerPrivate,
|
|
Blob& aBlob,
|
|
Maybe<IntRect>& aCropRect,
|
|
layers::Image** aImage)
|
|
: WorkerMainThreadRunnable(aWorkerPrivate)
|
|
, mBlob(aBlob)
|
|
, mCropRect(aCropRect)
|
|
, mImage(aImage)
|
|
{
|
|
}
|
|
|
|
bool MainThreadRun() override
|
|
{
|
|
RefPtr<layers::Image> image = DecodeAndCropBlob(mBlob, mCropRect);
|
|
|
|
if (NS_WARN_IF(!image)) {
|
|
return true;
|
|
}
|
|
|
|
image.forget(mImage);
|
|
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
Blob& mBlob;
|
|
Maybe<IntRect>& mCropRect;
|
|
layers::Image** mImage;
|
|
};
|
|
|
|
public:
|
|
CreateImageBitmapFromBlobWorkerTask(Promise* aPromise,
|
|
nsIGlobalObject* aGlobal,
|
|
mozilla::dom::Blob& aBlob,
|
|
const Maybe<IntRect>& aCropRect)
|
|
: WorkerSameThreadRunnable(GetCurrentThreadWorkerPrivate()),
|
|
CreateImageBitmapFromBlob(aPromise, aGlobal, aBlob, aCropRect)
|
|
{
|
|
}
|
|
|
|
bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
|
|
{
|
|
return DoCreateImageBitmapFromBlob();
|
|
}
|
|
|
|
private:
|
|
already_AddRefed<ImageBitmap> CreateImageBitmap() override
|
|
{
|
|
RefPtr<layers::Image> data;
|
|
|
|
ErrorResult rv;
|
|
RefPtr<DecodeBlobInMainThreadSyncTask> task =
|
|
new DecodeBlobInMainThreadSyncTask(mWorkerPrivate, *mBlob, mCropRect,
|
|
getter_AddRefs(data));
|
|
task->Dispatch(rv); // This is a synchronous call.
|
|
|
|
if (NS_WARN_IF(rv.Failed())) {
|
|
// XXXbz does this really make sense if we're shutting down? Ah, well.
|
|
mPromise->MaybeReject(rv);
|
|
return nullptr;
|
|
}
|
|
|
|
if (NS_WARN_IF(!data)) {
|
|
mPromise->MaybeReject(NS_ERROR_NOT_AVAILABLE);
|
|
return nullptr;
|
|
}
|
|
|
|
// Create ImageBitmap object.
|
|
RefPtr<ImageBitmap> imageBitmap = new ImageBitmap(mGlobalObject, data);
|
|
return imageBitmap.forget();
|
|
}
|
|
|
|
};
|
|
|
|
static void
|
|
AsyncCreateImageBitmapFromBlob(Promise* aPromise, nsIGlobalObject* aGlobal,
|
|
Blob& aBlob, const Maybe<IntRect>& aCropRect)
|
|
{
|
|
if (NS_IsMainThread()) {
|
|
nsCOMPtr<nsIRunnable> task =
|
|
new CreateImageBitmapFromBlobTask(aPromise, aGlobal, aBlob, aCropRect);
|
|
NS_DispatchToCurrentThread(task); // Actually, to the main-thread.
|
|
} else {
|
|
RefPtr<CreateImageBitmapFromBlobWorkerTask> task =
|
|
new CreateImageBitmapFromBlobWorkerTask(aPromise, aGlobal, aBlob, aCropRect);
|
|
task->Dispatch(GetCurrentThreadWorkerPrivate()->GetJSContext()); // Actually, to the current worker-thread.
|
|
}
|
|
}
|
|
|
|
/* static */ already_AddRefed<Promise>
|
|
ImageBitmap::Create(nsIGlobalObject* aGlobal, const ImageBitmapSource& aSrc,
|
|
const Maybe<gfx::IntRect>& aCropRect, ErrorResult& aRv)
|
|
{
|
|
MOZ_ASSERT(aGlobal);
|
|
|
|
RefPtr<Promise> promise = Promise::Create(aGlobal, aRv);
|
|
|
|
if (NS_WARN_IF(aRv.Failed())) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (aCropRect.isSome() && (aCropRect->Width() == 0 || aCropRect->Height() == 0)) {
|
|
aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
|
|
return promise.forget();
|
|
}
|
|
|
|
RefPtr<ImageBitmap> imageBitmap;
|
|
|
|
if (aSrc.IsHTMLImageElement()) {
|
|
MOZ_ASSERT(NS_IsMainThread(),
|
|
"Creating ImageBitmap from HTMLImageElement off the main thread.");
|
|
imageBitmap = CreateInternal(aGlobal, aSrc.GetAsHTMLImageElement(), aCropRect, aRv);
|
|
} else if (aSrc.IsHTMLVideoElement()) {
|
|
MOZ_ASSERT(NS_IsMainThread(),
|
|
"Creating ImageBitmap from HTMLVideoElement off the main thread.");
|
|
imageBitmap = CreateInternal(aGlobal, aSrc.GetAsHTMLVideoElement(), aCropRect, aRv);
|
|
} else if (aSrc.IsHTMLCanvasElement()) {
|
|
MOZ_ASSERT(NS_IsMainThread(),
|
|
"Creating ImageBitmap from HTMLCanvasElement off the main thread.");
|
|
imageBitmap = CreateInternal(aGlobal, aSrc.GetAsHTMLCanvasElement(), aCropRect, aRv);
|
|
} else if (aSrc.IsImageData()) {
|
|
imageBitmap = CreateInternal(aGlobal, aSrc.GetAsImageData(), aCropRect, aRv);
|
|
} else if (aSrc.IsCanvasRenderingContext2D()) {
|
|
MOZ_ASSERT(NS_IsMainThread(),
|
|
"Creating ImageBitmap from CanvasRenderingContext2D off the main thread.");
|
|
imageBitmap = CreateInternal(aGlobal, aSrc.GetAsCanvasRenderingContext2D(), aCropRect, aRv);
|
|
} else if (aSrc.IsImageBitmap()) {
|
|
imageBitmap = CreateInternal(aGlobal, aSrc.GetAsImageBitmap(), aCropRect, aRv);
|
|
} else if (aSrc.IsBlob()) {
|
|
AsyncCreateImageBitmapFromBlob(promise, aGlobal, aSrc.GetAsBlob(), aCropRect);
|
|
return promise.forget();
|
|
} else {
|
|
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
|
|
}
|
|
|
|
if (!aRv.Failed()) {
|
|
AsyncFulfillImageBitmapPromise(promise, imageBitmap);
|
|
}
|
|
|
|
return promise.forget();
|
|
}
|
|
|
|
/*static*/ JSObject*
|
|
ImageBitmap::ReadStructuredClone(JSContext* aCx,
|
|
JSStructuredCloneReader* aReader,
|
|
nsIGlobalObject* aParent,
|
|
const nsTArray<RefPtr<layers::Image>>& aClonedImages,
|
|
uint32_t aIndex)
|
|
{
|
|
MOZ_ASSERT(aCx);
|
|
MOZ_ASSERT(aReader);
|
|
// aParent might be null.
|
|
|
|
uint32_t picRectX_;
|
|
uint32_t picRectY_;
|
|
uint32_t picRectWidth_;
|
|
uint32_t picRectHeight_;
|
|
|
|
if (!JS_ReadUint32Pair(aReader, &picRectX_, &picRectY_) ||
|
|
!JS_ReadUint32Pair(aReader, &picRectWidth_, &picRectHeight_)) {
|
|
return nullptr;
|
|
}
|
|
|
|
int32_t picRectX = BitwiseCast<int32_t>(picRectX_);
|
|
int32_t picRectY = BitwiseCast<int32_t>(picRectY_);
|
|
int32_t picRectWidth = BitwiseCast<int32_t>(picRectWidth_);
|
|
int32_t picRectHeight = BitwiseCast<int32_t>(picRectHeight_);
|
|
|
|
// Create a new ImageBitmap.
|
|
MOZ_ASSERT(!aClonedImages.IsEmpty());
|
|
MOZ_ASSERT(aIndex < aClonedImages.Length());
|
|
|
|
// RefPtr<ImageBitmap> needs to go out of scope before toObjectOrNull() is
|
|
// called because the static analysis thinks dereferencing XPCOM objects
|
|
// can GC (because in some cases it can!), and a return statement with a
|
|
// JSObject* type means that JSObject* is on the stack as a raw pointer
|
|
// while destructors are running.
|
|
JS::Rooted<JS::Value> value(aCx);
|
|
{
|
|
RefPtr<ImageBitmap> imageBitmap =
|
|
new ImageBitmap(aParent, aClonedImages[aIndex]);
|
|
|
|
ErrorResult error;
|
|
imageBitmap->SetPictureRect(IntRect(picRectX, picRectY,
|
|
picRectWidth, picRectHeight), error);
|
|
if (NS_WARN_IF(error.Failed())) {
|
|
error.SuppressException();
|
|
return nullptr;
|
|
}
|
|
|
|
if (!GetOrCreateDOMReflector(aCx, imageBitmap, &value)) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
return &(value.toObject());
|
|
}
|
|
|
|
/*static*/ bool
|
|
ImageBitmap::WriteStructuredClone(JSStructuredCloneWriter* aWriter,
|
|
nsTArray<RefPtr<layers::Image>>& aClonedImages,
|
|
ImageBitmap* aImageBitmap)
|
|
{
|
|
MOZ_ASSERT(aWriter);
|
|
MOZ_ASSERT(aImageBitmap);
|
|
|
|
const uint32_t picRectX = BitwiseCast<uint32_t>(aImageBitmap->mPictureRect.x);
|
|
const uint32_t picRectY = BitwiseCast<uint32_t>(aImageBitmap->mPictureRect.y);
|
|
const uint32_t picRectWidth = BitwiseCast<uint32_t>(aImageBitmap->mPictureRect.width);
|
|
const uint32_t picRectHeight = BitwiseCast<uint32_t>(aImageBitmap->mPictureRect.height);
|
|
|
|
// Indexing the cloned images and send the index to the receiver.
|
|
uint32_t index = aClonedImages.Length();
|
|
|
|
if (NS_WARN_IF(!JS_WriteUint32Pair(aWriter, SCTAG_DOM_IMAGEBITMAP, index)) ||
|
|
NS_WARN_IF(!JS_WriteUint32Pair(aWriter, picRectX, picRectY)) ||
|
|
NS_WARN_IF(!JS_WriteUint32Pair(aWriter, picRectWidth, picRectHeight))) {
|
|
return false;
|
|
}
|
|
|
|
aClonedImages.AppendElement(aImageBitmap->mData);
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|