71e5f22bb8
Backed out changeset cdaa8a4e9e36 (bug 1632249) Backed out changeset 9ff26bcc580c (bug 1632249) Backed out changeset 16d84439756f (bug 1632249) Backed out changeset bbfe23c61add (bug 1632249)
426 lines
15 KiB
C++
426 lines
15 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "ImageEncoder.h"
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#include "mozilla/dom/CanvasRenderingContext2D.h"
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#include "mozilla/dom/GeneratePlaceholderCanvasData.h"
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#include "mozilla/dom/MemoryBlobImpl.h"
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#include "mozilla/dom/WorkerPrivate.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/DataSurfaceHelpers.h"
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#include "mozilla/layers/AsyncCanvasRenderer.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/SyncRunnable.h"
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#include "mozilla/Unused.h"
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#include "gfxUtils.h"
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#include "nsThreadUtils.h"
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#include "nsNetUtil.h"
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#include "nsXPCOMCIDInternal.h"
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#include "YCbCrUtils.h"
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using namespace mozilla::gfx;
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namespace mozilla {
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namespace dom {
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// This class should be placed inside GetBRGADataSourceSurfaceSync(). However,
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// due to B2G ICS uses old complier (C++98/03) which forbids local class as
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// template parameter, we need to move this class outside.
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class SurfaceHelper : public Runnable {
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public:
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explicit SurfaceHelper(already_AddRefed<layers::Image> aImage)
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: Runnable("SurfaceHelper"), mImage(aImage) {}
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// It retrieves a SourceSurface reference and convert color format on main
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// thread and passes DataSourceSurface to caller thread.
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NS_IMETHOD Run() override {
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// It guarantees the reference will be released on main thread.
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nsCountedRef<nsMainThreadSourceSurfaceRef> surface;
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surface.own(mImage->GetAsSourceSurface().take());
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if (surface->GetFormat() == gfx::SurfaceFormat::B8G8R8A8) {
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mDataSourceSurface = surface->GetDataSurface();
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} else {
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mDataSourceSurface = gfxUtils::CopySurfaceToDataSourceSurfaceWithFormat(
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surface, gfx::SurfaceFormat::B8G8R8A8);
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}
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return NS_OK;
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}
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already_AddRefed<gfx::DataSourceSurface> GetDataSurfaceSafe() {
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nsCOMPtr<nsIEventTarget> mainTarget = GetMainThreadEventTarget();
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MOZ_ASSERT(mainTarget);
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SyncRunnable::DispatchToThread(mainTarget, this, false);
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return mDataSourceSurface.forget();
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}
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private:
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RefPtr<layers::Image> mImage;
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RefPtr<gfx::DataSourceSurface> mDataSourceSurface;
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};
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// This function returns a DataSourceSurface in B8G8R8A8 format.
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// It uses SourceSurface to do format convert. Because most SourceSurface in
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// image formats should be referenced or dereferenced on main thread, it uses a
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// sync class SurfaceHelper to retrieve SourceSurface and convert to B8G8R8A8 on
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// main thread.
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already_AddRefed<DataSourceSurface> GetBRGADataSourceSurfaceSync(
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already_AddRefed<layers::Image> aImage) {
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RefPtr<SurfaceHelper> helper = new SurfaceHelper(std::move(aImage));
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return helper->GetDataSurfaceSafe();
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}
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class EncodingCompleteEvent : public CancelableRunnable {
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virtual ~EncodingCompleteEvent() = default;
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public:
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explicit EncodingCompleteEvent(
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EncodeCompleteCallback* aEncodeCompleteCallback)
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: CancelableRunnable("EncodingCompleteEvent"),
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mImgSize(0),
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mType(),
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mImgData(nullptr),
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mEncodeCompleteCallback(aEncodeCompleteCallback),
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mFailed(false) {
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if (!NS_IsMainThread() && IsCurrentThreadRunningWorker()) {
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mCreationEventTarget = GetCurrentThreadEventTarget();
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} else {
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mCreationEventTarget = GetMainThreadEventTarget();
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}
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}
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// MOZ_CAN_RUN_SCRIPT_BOUNDARY until Runnable::Run is MOZ_CAN_RUN_SCRIPT. See
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// bug 1535398.
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MOZ_CAN_RUN_SCRIPT_BOUNDARY
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NS_IMETHOD Run() override {
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nsresult rv = NS_OK;
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// We want to null out mEncodeCompleteCallback no matter what.
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RefPtr<EncodeCompleteCallback> callback(std::move(mEncodeCompleteCallback));
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if (!mFailed) {
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RefPtr<BlobImpl> blobImpl = new MemoryBlobImpl(mImgData, mImgSize, mType);
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rv = callback->ReceiveBlobImpl(blobImpl.forget());
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} else {
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rv = callback->ReceiveBlobImpl(nullptr);
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}
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return rv;
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}
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void SetMembers(void* aImgData, uint64_t aImgSize,
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const nsAutoString& aType) {
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mImgData = aImgData;
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mImgSize = aImgSize;
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mType = aType;
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}
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void SetFailed() { mFailed = true; }
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nsIEventTarget* GetCreationThreadEventTarget() {
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return mCreationEventTarget;
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}
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private:
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uint64_t mImgSize;
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nsAutoString mType;
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void* mImgData;
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nsCOMPtr<nsIEventTarget> mCreationEventTarget;
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RefPtr<EncodeCompleteCallback> mEncodeCompleteCallback;
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bool mFailed;
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};
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class EncodingRunnable : public Runnable {
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virtual ~EncodingRunnable() = default;
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public:
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NS_INLINE_DECL_REFCOUNTING_INHERITED(EncodingRunnable, Runnable)
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EncodingRunnable(const nsAString& aType, const nsAString& aOptions,
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UniquePtr<uint8_t[]> aImageBuffer, layers::Image* aImage,
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imgIEncoder* aEncoder,
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EncodingCompleteEvent* aEncodingCompleteEvent,
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int32_t aFormat, const nsIntSize aSize, bool aUsePlaceholder,
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bool aUsingCustomOptions)
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: Runnable("EncodingRunnable"),
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mType(aType),
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mOptions(aOptions),
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mImageBuffer(std::move(aImageBuffer)),
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mImage(aImage),
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mEncoder(aEncoder),
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mEncodingCompleteEvent(aEncodingCompleteEvent),
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mFormat(aFormat),
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mSize(aSize),
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mUsePlaceholder(aUsePlaceholder),
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mUsingCustomOptions(aUsingCustomOptions) {}
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nsresult ProcessImageData(uint64_t* aImgSize, void** aImgData) {
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nsCOMPtr<nsIInputStream> stream;
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nsresult rv = ImageEncoder::ExtractDataInternal(
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mType, mOptions, mImageBuffer.get(), mFormat, mSize, mUsePlaceholder,
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mImage, nullptr, nullptr, getter_AddRefs(stream), mEncoder);
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// If there are unrecognized custom parse options, we should fall back to
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// the default values for the encoder without any options at all.
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if (rv == NS_ERROR_INVALID_ARG && mUsingCustomOptions) {
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rv = ImageEncoder::ExtractDataInternal(
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mType, EmptyString(), mImageBuffer.get(), mFormat, mSize,
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mUsePlaceholder, mImage, nullptr, nullptr, getter_AddRefs(stream),
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mEncoder);
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}
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NS_ENSURE_SUCCESS(rv, rv);
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rv = NS_ReadInputStreamToBuffer(stream, aImgData, -1, aImgSize);
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NS_ENSURE_SUCCESS(rv, rv);
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return rv;
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}
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NS_IMETHOD Run() override {
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uint64_t imgSize;
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void* imgData = nullptr;
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nsresult rv = ProcessImageData(&imgSize, &imgData);
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if (NS_FAILED(rv)) {
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mEncodingCompleteEvent->SetFailed();
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} else {
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mEncodingCompleteEvent->SetMembers(imgData, imgSize, mType);
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}
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rv = mEncodingCompleteEvent->GetCreationThreadEventTarget()->Dispatch(
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mEncodingCompleteEvent, nsIThread::DISPATCH_NORMAL);
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if (NS_FAILED(rv)) {
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// Better to leak than to crash.
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Unused << mEncodingCompleteEvent.forget();
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return rv;
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}
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return rv;
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}
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private:
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nsAutoString mType;
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nsAutoString mOptions;
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UniquePtr<uint8_t[]> mImageBuffer;
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RefPtr<layers::Image> mImage;
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nsCOMPtr<imgIEncoder> mEncoder;
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RefPtr<EncodingCompleteEvent> mEncodingCompleteEvent;
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int32_t mFormat;
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const nsIntSize mSize;
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bool mUsePlaceholder;
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bool mUsingCustomOptions;
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};
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/* static */
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nsresult ImageEncoder::ExtractData(nsAString& aType, const nsAString& aOptions,
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const nsIntSize aSize, bool aUsePlaceholder,
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nsICanvasRenderingContextInternal* aContext,
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layers::AsyncCanvasRenderer* aRenderer,
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nsIInputStream** aStream) {
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nsCOMPtr<imgIEncoder> encoder = ImageEncoder::GetImageEncoder(aType);
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if (!encoder) {
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return NS_IMAGELIB_ERROR_NO_ENCODER;
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}
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return ExtractDataInternal(aType, aOptions, nullptr, 0, aSize,
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aUsePlaceholder, nullptr, aContext, aRenderer,
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aStream, encoder);
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}
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/* static */
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nsresult ImageEncoder::ExtractDataFromLayersImageAsync(
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nsAString& aType, const nsAString& aOptions, bool aUsingCustomOptions,
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layers::Image* aImage, bool aUsePlaceholder,
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EncodeCompleteCallback* aEncodeCallback) {
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nsCOMPtr<imgIEncoder> encoder = ImageEncoder::GetImageEncoder(aType);
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if (!encoder) {
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return NS_IMAGELIB_ERROR_NO_ENCODER;
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}
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RefPtr<EncodingCompleteEvent> completeEvent =
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new EncodingCompleteEvent(aEncodeCallback);
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nsIntSize size(aImage->GetSize().width, aImage->GetSize().height);
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nsCOMPtr<nsIRunnable> event =
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new EncodingRunnable(aType, aOptions, nullptr, aImage, encoder,
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completeEvent, imgIEncoder::INPUT_FORMAT_HOSTARGB,
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size, aUsePlaceholder, aUsingCustomOptions);
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return NS_DispatchBackgroundTask(event.forget());
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}
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/* static */
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nsresult ImageEncoder::ExtractDataAsync(
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nsAString& aType, const nsAString& aOptions, bool aUsingCustomOptions,
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UniquePtr<uint8_t[]> aImageBuffer, int32_t aFormat, const nsIntSize aSize,
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bool aUsePlaceholder, EncodeCompleteCallback* aEncodeCallback) {
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nsCOMPtr<imgIEncoder> encoder = ImageEncoder::GetImageEncoder(aType);
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if (!encoder) {
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return NS_IMAGELIB_ERROR_NO_ENCODER;
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}
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RefPtr<EncodingCompleteEvent> completeEvent =
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new EncodingCompleteEvent(aEncodeCallback);
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nsCOMPtr<nsIRunnable> event = new EncodingRunnable(
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aType, aOptions, std::move(aImageBuffer), nullptr, encoder, completeEvent,
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aFormat, aSize, aUsePlaceholder, aUsingCustomOptions);
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return NS_DispatchBackgroundTask(event.forget());
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}
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/*static*/
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nsresult ImageEncoder::GetInputStream(int32_t aWidth, int32_t aHeight,
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uint8_t* aImageBuffer, int32_t aFormat,
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imgIEncoder* aEncoder,
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const nsAString& aEncoderOptions,
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nsIInputStream** aStream) {
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nsresult rv =
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aEncoder->InitFromData(aImageBuffer, aWidth * aHeight * 4, aWidth,
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aHeight, aWidth * 4, aFormat, aEncoderOptions);
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<imgIEncoder> encoder(aEncoder);
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encoder.forget(aStream);
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return NS_OK;
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}
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/* static */
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nsresult ImageEncoder::ExtractDataInternal(
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const nsAString& aType, const nsAString& aOptions, uint8_t* aImageBuffer,
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int32_t aFormat, const nsIntSize aSize, bool aUsePlaceholder,
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layers::Image* aImage, nsICanvasRenderingContextInternal* aContext,
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layers::AsyncCanvasRenderer* aRenderer, nsIInputStream** aStream,
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imgIEncoder* aEncoder) {
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if (aSize.IsEmpty()) {
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return NS_ERROR_INVALID_ARG;
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}
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nsCOMPtr<nsIInputStream> imgStream;
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// get image bytes
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nsresult rv;
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if (aImageBuffer && !aUsePlaceholder) {
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if (BufferSizeFromDimensions(aSize.width, aSize.height, 4) == 0) {
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return NS_ERROR_INVALID_ARG;
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}
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rv = ImageEncoder::GetInputStream(aSize.width, aSize.height, aImageBuffer,
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aFormat, aEncoder, aOptions,
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getter_AddRefs(imgStream));
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} else if (aContext && !aUsePlaceholder) {
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NS_ConvertUTF16toUTF8 encoderType(aType);
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rv = aContext->GetInputStream(encoderType.get(), aOptions,
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getter_AddRefs(imgStream));
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} else if (aRenderer && !aUsePlaceholder) {
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NS_ConvertUTF16toUTF8 encoderType(aType);
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rv = aRenderer->GetInputStream(encoderType.get(), aOptions,
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getter_AddRefs(imgStream));
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} else if (aImage && !aUsePlaceholder) {
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// It is safe to convert PlanarYCbCr format from YUV to RGB off-main-thread.
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// Other image formats could have problem to convert format off-main-thread.
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// So here it uses a help function GetBRGADataSourceSurfaceSync() to convert
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// format on main thread.
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if (aImage->GetFormat() == ImageFormat::PLANAR_YCBCR) {
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nsTArray<uint8_t> data;
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layers::PlanarYCbCrImage* ycbcrImage =
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static_cast<layers::PlanarYCbCrImage*>(aImage);
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gfxImageFormat format = SurfaceFormat::A8R8G8B8_UINT32;
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uint32_t stride = GetAlignedStride<16>(aSize.width, 4);
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size_t length = BufferSizeFromStrideAndHeight(stride, aSize.height);
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if (length == 0) {
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return NS_ERROR_INVALID_ARG;
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}
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data.SetCapacity(length);
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ConvertYCbCrToRGB(*ycbcrImage->GetData(), format, aSize, data.Elements(),
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stride);
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rv = aEncoder->InitFromData(data.Elements(),
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aSize.width * aSize.height * 4, aSize.width,
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aSize.height, aSize.width * 4,
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imgIEncoder::INPUT_FORMAT_HOSTARGB, aOptions);
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} else {
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if (BufferSizeFromDimensions(aSize.width, aSize.height, 4) == 0) {
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return NS_ERROR_INVALID_ARG;
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}
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RefPtr<gfx::DataSourceSurface> dataSurface;
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RefPtr<layers::Image> image(aImage);
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dataSurface = GetBRGADataSourceSurfaceSync(image.forget());
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DataSourceSurface::MappedSurface map;
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if (!dataSurface->Map(gfx::DataSourceSurface::MapType::READ, &map)) {
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return NS_ERROR_INVALID_ARG;
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}
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rv = aEncoder->InitFromData(map.mData, aSize.width * aSize.height * 4,
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aSize.width, aSize.height, aSize.width * 4,
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imgIEncoder::INPUT_FORMAT_HOSTARGB, aOptions);
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dataSurface->Unmap();
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}
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if (NS_SUCCEEDED(rv)) {
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imgStream = aEncoder;
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}
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} else {
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if (BufferSizeFromDimensions(aSize.width, aSize.height, 4) == 0) {
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return NS_ERROR_INVALID_ARG;
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}
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// no context, so we have to encode an empty image
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// note that if we didn't have a current context, the spec says we're
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// supposed to just return transparent black pixels of the canvas
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// dimensions.
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RefPtr<DataSourceSurface> emptyCanvas =
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Factory::CreateDataSourceSurfaceWithStride(
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IntSize(aSize.width, aSize.height), SurfaceFormat::B8G8R8A8,
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4 * aSize.width, true);
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if (NS_WARN_IF(!emptyCanvas)) {
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return NS_ERROR_INVALID_ARG;
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}
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DataSourceSurface::MappedSurface map;
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if (!emptyCanvas->Map(DataSourceSurface::MapType::WRITE, &map)) {
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return NS_ERROR_INVALID_ARG;
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}
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if (aUsePlaceholder) {
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auto size = 4 * aSize.width * aSize.height;
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auto* data = map.mData;
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GeneratePlaceholderCanvasData(size, data);
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}
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rv = aEncoder->InitFromData(map.mData, aSize.width * aSize.height * 4,
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aSize.width, aSize.height, aSize.width * 4,
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imgIEncoder::INPUT_FORMAT_HOSTARGB, aOptions);
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emptyCanvas->Unmap();
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if (NS_SUCCEEDED(rv)) {
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imgStream = aEncoder;
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}
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}
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NS_ENSURE_SUCCESS(rv, rv);
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imgStream.forget(aStream);
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return rv;
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}
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/* static */
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already_AddRefed<imgIEncoder> ImageEncoder::GetImageEncoder(nsAString& aType) {
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// Get an image encoder for the media type.
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nsCString encoderCID("@mozilla.org/image/encoder;2?type=");
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NS_ConvertUTF16toUTF8 encoderType(aType);
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encoderCID += encoderType;
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nsCOMPtr<imgIEncoder> encoder = do_CreateInstance(encoderCID.get());
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if (!encoder && aType != NS_LITERAL_STRING("image/png")) {
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// Unable to create an encoder instance of the specified type. Falling back
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// to PNG.
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aType.AssignLiteral("image/png");
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nsCString PNGEncoderCID("@mozilla.org/image/encoder;2?type=image/png");
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encoder = do_CreateInstance(PNGEncoderCID.get());
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}
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return encoder.forget();
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}
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} // namespace dom
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} // namespace mozilla
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