зеркало из https://github.com/mozilla/gecko-dev.git
142 строки
3.5 KiB
C++
142 строки
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_image_ImageUtils_h
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#define mozilla_image_ImageUtils_h
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#include "FrameTimeout.h"
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#include "mozilla/image/SurfaceFlags.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/MozPromise.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/ThreadSafeWeakPtr.h"
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#include "nsString.h"
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#include "nsTArray.h"
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namespace mozilla {
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class ErrorResult;
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namespace gfx {
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class SourceSurface;
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}
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namespace image {
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class Decoder;
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class imgFrame;
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class ImageMetadata;
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class SourceBuffer;
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/**
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* The type of decoder; this is usually determined from a MIME type using
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* DecoderFactory::GetDecoderType() or ImageUtils::GetDecoderType().
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*/
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enum class DecoderType {
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PNG,
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GIF,
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JPEG,
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BMP,
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BMP_CLIPBOARD,
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ICO,
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ICON,
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WEBP,
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AVIF,
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JXL,
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UNKNOWN
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};
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struct DecodeMetadataResult {
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int32_t mWidth = 0;
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int32_t mHeight = 0;
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int32_t mRepetitions = -1;
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uint32_t mFrameCount = 0;
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bool mAnimated = false;
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bool mFrameCountComplete = true;
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};
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struct DecodeFrameCountResult {
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uint32_t mFrameCount = 0;
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bool mFinished = false;
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};
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struct DecodedFrame {
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RefPtr<gfx::SourceSurface> mSurface;
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FrameTimeout mTimeout;
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};
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struct DecodeFramesResult {
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nsTArray<DecodedFrame> mFrames;
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bool mFinished = false;
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};
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using DecodeMetadataPromise = MozPromise<DecodeMetadataResult, nsresult, true>;
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using DecodeFrameCountPromise =
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MozPromise<DecodeFrameCountResult, nsresult, true>;
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using DecodeFramesPromise = MozPromise<DecodeFramesResult, nsresult, true>;
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class AnonymousMetadataDecoderTask;
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class AnonymousFrameCountDecoderTask;
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class AnonymousFramesDecoderTask;
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class AnonymousDecoder : public SupportsThreadSafeWeakPtr<AnonymousDecoder> {
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public:
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virtual RefPtr<DecodeMetadataPromise> DecodeMetadata() = 0;
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virtual void Destroy() = 0;
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virtual RefPtr<DecodeFrameCountPromise> DecodeFrameCount(
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uint32_t aKnownFrameCount) = 0;
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virtual RefPtr<DecodeFramesPromise> DecodeFrames(size_t aCount) = 0;
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virtual void CancelDecodeFrames() = 0;
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#ifdef MOZ_REFCOUNTED_LEAK_CHECKING
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virtual const char* typeName() const = 0;
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virtual size_t typeSize() const = 0;
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#endif
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virtual ~AnonymousDecoder();
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protected:
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AnonymousDecoder();
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// Returns true if successfully initialized else false.
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virtual bool Initialize(RefPtr<Decoder>&& aDecoder) = 0;
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virtual void OnMetadata(const ImageMetadata* aMetadata) = 0;
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virtual void OnFrameCount(uint32_t aFrameCount, bool aComplete) = 0;
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// Returns true if the caller should continue decoding more frames if
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// possible.
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virtual bool OnFrameAvailable(RefPtr<imgFrame>&& aFrame,
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RefPtr<gfx::SourceSurface>&& aSurface) = 0;
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virtual void OnFramesComplete() = 0;
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friend class AnonymousMetadataDecoderTask;
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friend class AnonymousFrameCountDecoderTask;
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friend class AnonymousFramesDecoderTask;
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};
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class ImageUtils {
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public:
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static already_AddRefed<AnonymousDecoder> CreateDecoder(
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SourceBuffer* aSourceBuffer, DecoderType aType,
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const Maybe<gfx::IntSize>& aOutputSize, SurfaceFlags aSurfaceFlags);
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static DecoderType GetDecoderType(const nsACString& aMimeType);
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private:
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ImageUtils() = delete;
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~ImageUtils() = delete;
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};
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} // namespace image
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} // namespace mozilla
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#endif // mozilla_image_ImageUtils_h
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