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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_DOM_OFFSCREENCANVASDISPLAYHELPER_H_
#define MOZILLA_DOM_OFFSCREENCANVASDISPLAYHELPER_H_
#include "ImageContainer.h"
#include "GLContextTypes.h"
#include "mozilla/dom/CanvasRenderingContextHelper.h"
#include "mozilla/gfx/Point.h"
#include "mozilla/layers/LayersTypes.h"
#include "mozilla/Maybe.h"
#include "mozilla/Mutex.h"
#include "mozilla/RefPtr.h"
#include "mozilla/UniquePtr.h"
#include "nsISupportsImpl.h"
#include "nsThreadUtils.h"
namespace mozilla::dom {
class HTMLCanvasElement;
class OffscreenCanvas;
class ThreadSafeWorkerRef;
struct OffscreenCanvasDisplayData final {
mozilla::gfx::IntSize mSize = {0, 0};
bool mDoPaintCallbacks = false;
bool mIsOpaque = true;
bool mIsAlphaPremult = true;
mozilla::gl::OriginPos mOriginPos = gl::OriginPos::TopLeft;
Maybe<layers::RemoteTextureOwnerId> mOwnerId;
};
class OffscreenCanvasDisplayHelper final {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(OffscreenCanvasDisplayHelper)
public:
explicit OffscreenCanvasDisplayHelper(HTMLCanvasElement* aCanvasElement,
uint32_t aWidth, uint32_t aHeight);
CanvasContextType GetContextType() const;
RefPtr<layers::ImageContainer> GetImageContainer() const;
void UpdateContext(OffscreenCanvas* aOffscreenCanvas,
RefPtr<ThreadSafeWorkerRef>&& aWorkerRef,
CanvasContextType aType, const Maybe<int32_t>& aChildId);
void FlushForDisplay();
bool CommitFrameToCompositor(nsICanvasRenderingContextInternal* aContext,
layers::TextureType aTextureType,
const Maybe<OffscreenCanvasDisplayData>& aData);
void DestroyCanvas();
void DestroyElement();
bool CanElementCaptureStream() const;
bool UsingElementCaptureStream() const;
already_AddRefed<mozilla::gfx::SourceSurface> GetSurfaceSnapshot();
already_AddRefed<mozilla::layers::Image> GetAsImage();
UniquePtr<uint8_t[]> GetImageBuffer(int32_t* aOutFormat,
gfx::IntSize* aOutImageSize);
private:
~OffscreenCanvasDisplayHelper();
void MaybeQueueInvalidateElement() MOZ_REQUIRES(mMutex);
void InvalidateElement();
already_AddRefed<gfx::SourceSurface> TransformSurface(
gfx::SourceSurface* aSurface, bool aHasAlpha, bool aIsAlphaPremult,
gl::OriginPos aOriginPos) const;
mutable Mutex mMutex;
HTMLCanvasElement* MOZ_NON_OWNING_REF mCanvasElement MOZ_GUARDED_BY(mMutex);
OffscreenCanvas* MOZ_NON_OWNING_REF mOffscreenCanvas MOZ_GUARDED_BY(mMutex) =
nullptr;
RefPtr<layers::ImageContainer> mImageContainer MOZ_GUARDED_BY(mMutex);
RefPtr<gfx::SourceSurface> mFrontBufferSurface MOZ_GUARDED_BY(mMutex);
RefPtr<ThreadSafeWorkerRef> mWorkerRef MOZ_GUARDED_BY(mMutex);
OffscreenCanvasDisplayData mData MOZ_GUARDED_BY(mMutex);
CanvasContextType mType MOZ_GUARDED_BY(mMutex) = CanvasContextType::NoContext;
Maybe<uint32_t> mContextManagerId MOZ_GUARDED_BY(mMutex);
Maybe<int32_t> mContextChildId MOZ_GUARDED_BY(mMutex);
const mozilla::layers::ImageContainer::ProducerID mImageProducerID;
mozilla::layers::ImageContainer::FrameID mLastFrameID MOZ_GUARDED_BY(mMutex) =
0;
bool mPendingInvalidate MOZ_GUARDED_BY(mMutex) = false;
};
} // namespace mozilla::dom
#endif // MOZILLA_DOM_OFFSCREENCANVASDISPLAYHELPER_H_
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