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95 lines
3.5 KiB
C++
95 lines
3.5 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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#ifndef MOZILLA_DOM_OFFSCREENCANVASDISPLAYHELPER_H_
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#define MOZILLA_DOM_OFFSCREENCANVASDISPLAYHELPER_H_
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#include "ImageContainer.h"
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#include "GLContextTypes.h"
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#include "mozilla/dom/CanvasRenderingContextHelper.h"
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#include "mozilla/gfx/Point.h"
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#include "mozilla/layers/LayersTypes.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/Mutex.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/UniquePtr.h"
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#include "nsISupportsImpl.h"
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#include "nsThreadUtils.h"
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namespace mozilla::dom {
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class HTMLCanvasElement;
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class OffscreenCanvas;
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class ThreadSafeWorkerRef;
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struct OffscreenCanvasDisplayData final {
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mozilla::gfx::IntSize mSize = {0, 0};
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bool mDoPaintCallbacks = false;
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bool mIsOpaque = true;
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bool mIsAlphaPremult = true;
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mozilla::gl::OriginPos mOriginPos = gl::OriginPos::TopLeft;
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Maybe<layers::RemoteTextureOwnerId> mOwnerId;
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};
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class OffscreenCanvasDisplayHelper final {
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(OffscreenCanvasDisplayHelper)
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public:
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explicit OffscreenCanvasDisplayHelper(HTMLCanvasElement* aCanvasElement,
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uint32_t aWidth, uint32_t aHeight);
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CanvasContextType GetContextType() const;
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RefPtr<layers::ImageContainer> GetImageContainer() const;
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void UpdateContext(OffscreenCanvas* aOffscreenCanvas,
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RefPtr<ThreadSafeWorkerRef>&& aWorkerRef,
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CanvasContextType aType, const Maybe<int32_t>& aChildId);
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void FlushForDisplay();
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bool CommitFrameToCompositor(nsICanvasRenderingContextInternal* aContext,
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layers::TextureType aTextureType,
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const Maybe<OffscreenCanvasDisplayData>& aData);
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void DestroyCanvas();
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void DestroyElement();
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already_AddRefed<mozilla::gfx::SourceSurface> GetSurfaceSnapshot();
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already_AddRefed<mozilla::layers::Image> GetAsImage();
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UniquePtr<uint8_t[]> GetImageBuffer(int32_t* aOutFormat,
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gfx::IntSize* aOutImageSize);
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private:
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~OffscreenCanvasDisplayHelper();
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void MaybeQueueInvalidateElement() MOZ_REQUIRES(mMutex);
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void InvalidateElement();
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already_AddRefed<gfx::SourceSurface> TransformSurface(
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gfx::SourceSurface* aSurface, bool aHasAlpha, bool aIsAlphaPremult,
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gl::OriginPos aOriginPos) const;
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mutable Mutex mMutex;
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HTMLCanvasElement* MOZ_NON_OWNING_REF mCanvasElement MOZ_GUARDED_BY(mMutex);
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OffscreenCanvas* MOZ_NON_OWNING_REF mOffscreenCanvas MOZ_GUARDED_BY(mMutex) =
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nullptr;
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RefPtr<layers::ImageContainer> mImageContainer MOZ_GUARDED_BY(mMutex);
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RefPtr<gfx::SourceSurface> mFrontBufferSurface MOZ_GUARDED_BY(mMutex);
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RefPtr<ThreadSafeWorkerRef> mWorkerRef MOZ_GUARDED_BY(mMutex);
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OffscreenCanvasDisplayData mData MOZ_GUARDED_BY(mMutex);
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CanvasContextType mType MOZ_GUARDED_BY(mMutex) = CanvasContextType::NoContext;
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Maybe<uint32_t> mContextManagerId MOZ_GUARDED_BY(mMutex);
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Maybe<int32_t> mContextChildId MOZ_GUARDED_BY(mMutex);
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const mozilla::layers::ImageContainer::ProducerID mImageProducerID;
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mozilla::layers::ImageContainer::FrameID mLastFrameID MOZ_GUARDED_BY(mMutex) =
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0;
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bool mPendingInvalidate MOZ_GUARDED_BY(mMutex) = false;
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};
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} // namespace mozilla::dom
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#endif // MOZILLA_DOM_OFFSCREENCANVASDISPLAYHELPER_H_
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