mirror of
https://github.com/mozilla/gecko-dev.git
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608 lines
21 KiB
C++
608 lines
21 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/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 "nsIThreadPool.h"
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#include "nsNetUtil.h"
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#include "nsXPCOMCIDInternal.h"
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#include "WorkerPrivate.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")
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, mImage(aImage)
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{}
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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::
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CopySurfaceToDataSourceSurfaceWithFormat(surface,
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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>
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GetBRGADataSourceSurfaceSync(already_AddRefed<layers::Image> aImage)
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{
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RefPtr<SurfaceHelper> helper = new SurfaceHelper(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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{
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virtual ~EncodingCompleteEvent() {}
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public:
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explicit EncodingCompleteEvent(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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{
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if (!NS_IsMainThread() && workers::GetCurrentThreadWorkerPrivate()) {
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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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NS_IMETHOD Run() override
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{
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nsresult rv = NS_OK;
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if (!mFailed) {
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// The correct parentObject has to be set by the mEncodeCompleteCallback.
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RefPtr<Blob> blob =
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Blob::CreateMemoryBlob(nullptr, mImgData, mImgSize, mType);
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MOZ_ASSERT(blob);
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rv = mEncodeCompleteCallback->ReceiveBlob(blob.forget());
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}
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mEncodeCompleteCallback = nullptr;
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return rv;
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}
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void SetMembers(void* aImgData, uint64_t aImgSize, const nsAutoString& aType)
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{
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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()
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{
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mFailed = true;
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}
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nsIEventTarget* GetCreationThreadEventTarget()
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{
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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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{
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virtual ~EncodingRunnable() {}
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public:
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NS_DECL_ISUPPORTS_INHERITED
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EncodingRunnable(const nsAString& aType,
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const nsAString& aOptions,
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UniquePtr<uint8_t[]> aImageBuffer,
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layers::Image* aImage,
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imgIEncoder* aEncoder,
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EncodingCompleteEvent* aEncodingCompleteEvent,
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int32_t aFormat,
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const nsIntSize aSize,
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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(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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{}
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nsresult ProcessImageData(uint64_t* aImgSize, void** aImgData)
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{
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nsCOMPtr<nsIInputStream> stream;
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nsresult rv = ImageEncoder::ExtractDataInternal(mType,
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mOptions,
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mImageBuffer.get(),
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mFormat,
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mSize,
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mUsePlaceholder,
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mImage,
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nullptr,
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nullptr,
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getter_AddRefs(stream),
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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(mType,
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EmptyString(),
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mImageBuffer.get(),
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mFormat,
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mSize,
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mUsePlaceholder,
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mImage,
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nullptr,
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nullptr,
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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 = stream->Available(aImgSize);
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(*aImgSize <= UINT32_MAX, NS_ERROR_FILE_TOO_BIG);
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rv = NS_ReadInputStreamToBuffer(stream, aImgData, *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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{
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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()->
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Dispatch(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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NS_IMPL_ISUPPORTS_INHERITED0(EncodingRunnable, Runnable);
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StaticRefPtr<nsIThreadPool> ImageEncoder::sThreadPool;
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/* static */
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nsresult
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ImageEncoder::ExtractData(nsAString& aType,
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const nsAString& aOptions,
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const nsIntSize aSize,
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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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{
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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,
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aContext, aRenderer, aStream, encoder);
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}
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/* static */
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nsresult
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ImageEncoder::ExtractDataFromLayersImageAsync(nsAString& aType,
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const nsAString& aOptions,
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bool aUsingCustomOptions,
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layers::Image* aImage,
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bool aUsePlaceholder,
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EncodeCompleteCallback* aEncodeCallback)
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{
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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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nsresult rv = EnsureThreadPool();
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if (NS_FAILED(rv)) {
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return rv;
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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 = new EncodingRunnable(aType,
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aOptions,
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nullptr,
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aImage,
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encoder,
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completeEvent,
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imgIEncoder::INPUT_FORMAT_HOSTARGB,
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size,
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aUsePlaceholder,
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aUsingCustomOptions);
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return sThreadPool->Dispatch(event, NS_DISPATCH_NORMAL);
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}
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/* static */
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nsresult
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ImageEncoder::ExtractDataAsync(nsAString& aType,
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const nsAString& aOptions,
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bool aUsingCustomOptions,
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UniquePtr<uint8_t[]> aImageBuffer,
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int32_t aFormat,
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const nsIntSize aSize,
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bool aUsePlaceholder,
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EncodeCompleteCallback* aEncodeCallback)
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{
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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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nsresult rv = EnsureThreadPool();
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if (NS_FAILED(rv)) {
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return rv;
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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(aType,
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aOptions,
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Move(aImageBuffer),
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nullptr,
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encoder,
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completeEvent,
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aFormat,
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aSize,
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aUsePlaceholder,
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aUsingCustomOptions);
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return sThreadPool->Dispatch(event, NS_DISPATCH_NORMAL);
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}
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/*static*/ nsresult
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ImageEncoder::GetInputStream(int32_t aWidth,
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int32_t aHeight,
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uint8_t* aImageBuffer,
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int32_t aFormat,
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imgIEncoder* aEncoder,
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const char16_t* aEncoderOptions,
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nsIInputStream** aStream)
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{
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nsresult rv =
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aEncoder->InitFromData(aImageBuffer,
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aWidth * aHeight * 4, aWidth, aHeight, aWidth * 4,
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aFormat,
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nsDependentString(aEncoderOptions));
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NS_ENSURE_SUCCESS(rv, rv);
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return CallQueryInterface(aEncoder, aStream);
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}
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/* static */
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nsresult
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ImageEncoder::ExtractDataInternal(const nsAString& aType,
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const nsAString& aOptions,
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uint8_t* aImageBuffer,
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int32_t aFormat,
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const nsIntSize aSize,
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bool aUsePlaceholder,
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layers::Image* aImage,
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nsICanvasRenderingContextInternal* aContext,
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layers::AsyncCanvasRenderer* aRenderer,
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nsIInputStream** aStream,
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imgIEncoder* aEncoder)
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{
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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(
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aSize.width,
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aSize.height,
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aImageBuffer,
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aFormat,
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aEncoder,
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nsPromiseFlatString(aOptions).get(),
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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(),
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nsPromiseFlatString(aOptions).get(),
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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(),
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nsPromiseFlatString(aOptions).get(),
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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 = 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(),
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format,
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aSize,
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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,
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aSize.width,
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aSize.height,
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aSize.width * 4,
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imgIEncoder::INPUT_FORMAT_HOSTARGB,
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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,
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aSize.width * aSize.height * 4,
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aSize.width,
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aSize.height,
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aSize.width * 4,
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imgIEncoder::INPUT_FORMAT_HOSTARGB,
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aOptions);
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dataSurface->Unmap();
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}
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if (NS_SUCCEEDED(rv)) {
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imgStream = do_QueryInterface(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(IntSize(aSize.width, aSize.height),
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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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// If placeholder data was requested, return all-white, opaque image data.
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memset(map.mData, 0xFF, 4 * aSize.width * aSize.height);
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}
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rv = aEncoder->InitFromData(map.mData,
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aSize.width * aSize.height * 4,
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aSize.width,
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aSize.height,
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aSize.width * 4,
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imgIEncoder::INPUT_FORMAT_HOSTARGB,
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aOptions);
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emptyCanvas->Unmap();
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if (NS_SUCCEEDED(rv)) {
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imgStream = do_QueryInterface(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>
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ImageEncoder::GetImageEncoder(nsAString& aType)
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{
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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");
|
|
encoder = do_CreateInstance(PNGEncoderCID.get());
|
|
}
|
|
|
|
return encoder.forget();
|
|
}
|
|
|
|
class EncoderThreadPoolTerminator final : public nsIObserver
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
|
|
NS_IMETHOD Observe(nsISupports *, const char *topic, const char16_t *) override
|
|
{
|
|
NS_ASSERTION(!strcmp(topic, "xpcom-shutdown-threads"),
|
|
"Unexpected topic");
|
|
if (ImageEncoder::sThreadPool) {
|
|
ImageEncoder::sThreadPool->Shutdown();
|
|
ImageEncoder::sThreadPool = nullptr;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
private:
|
|
~EncoderThreadPoolTerminator() {}
|
|
};
|
|
|
|
NS_IMPL_ISUPPORTS(EncoderThreadPoolTerminator, nsIObserver)
|
|
|
|
static void
|
|
RegisterEncoderThreadPoolTerminatorObserver()
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
|
|
NS_ASSERTION(os, "do_GetService failed");
|
|
os->AddObserver(new EncoderThreadPoolTerminator(),
|
|
"xpcom-shutdown-threads",
|
|
false);
|
|
}
|
|
|
|
/* static */
|
|
nsresult
|
|
ImageEncoder::EnsureThreadPool()
|
|
{
|
|
if (!sThreadPool) {
|
|
nsCOMPtr<nsIThreadPool> threadPool = do_CreateInstance(NS_THREADPOOL_CONTRACTID);
|
|
sThreadPool = threadPool;
|
|
|
|
if (!NS_IsMainThread()) {
|
|
NS_DispatchToMainThread(NS_NewRunnableFunction(
|
|
"dom::ImageEncoder::EnsureThreadPool",
|
|
[]() -> void { RegisterEncoderThreadPoolTerminatorObserver(); }));
|
|
} else {
|
|
RegisterEncoderThreadPoolTerminatorObserver();
|
|
}
|
|
|
|
const uint32_t kThreadLimit = 2;
|
|
const uint32_t kIdleThreadLimit = 1;
|
|
const uint32_t kIdleThreadTimeoutMs = 30000;
|
|
|
|
nsresult rv = sThreadPool->SetName(NS_LITERAL_CSTRING("EncodingRunnable"));
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
rv = sThreadPool->SetThreadLimit(kThreadLimit);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
rv = sThreadPool->SetIdleThreadLimit(kIdleThreadLimit);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
rv = sThreadPool->SetIdleThreadTimeout(kIdleThreadTimeoutMs);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|