зеркало из https://github.com/mozilla/gecko-dev.git
72 строки
2.3 KiB
C++
72 строки
2.3 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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#ifndef MOZILLA_GFX_CANVASCLIENT_H
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#define MOZILLA_GFX_CANVASCLIENT_H
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#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
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#include "mozilla/Attributes.h" // for override
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#include "mozilla/RefPtr.h" // for RefPtr, already_AddRefed
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#include "mozilla/layers/CompositableClient.h" // for CompositableClient
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#include "mozilla/layers/CompositorTypes.h" // for TextureInfo, etc
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#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor
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#include "mozilla/layers/TextureClient.h" // for TextureClient, etc
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#include "mozilla/layers/PersistentBufferProvider.h"
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#include "mozilla/MaybeOneOf.h"
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#include "mozilla/mozalloc.h" // for operator delete
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#include "mozilla/gfx/Point.h" // for IntSize
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#include "mozilla/gfx/Types.h" // for SurfaceFormat
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namespace mozilla {
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namespace layers {
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class CompositableForwarder;
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/**
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* Compositable client for 2d and webgl canvas.
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*/
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class CanvasClient final : public CompositableClient {
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int32_t mFrameID = 0;
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RefPtr<TextureClient> mFrontBuffer;
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public:
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/**
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* Creates, configures, and returns a new canvas client. If necessary, a
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* message will be sent to the compositor to create a corresponding image
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* host.
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*/
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CanvasClient(CompositableForwarder* aFwd, const TextureFlags flags)
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: CompositableClient(aFwd, flags) {}
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virtual ~CanvasClient() = default;
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void Clear() { mFrontBuffer = nullptr; }
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bool AddTextureClient(TextureClient* aTexture) override {
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++mFrameID;
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return CompositableClient::AddTextureClient(aTexture);
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}
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TextureInfo GetTextureInfo() const override {
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return TextureInfo(CompositableType::IMAGE, mTextureFlags);
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}
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void OnDetach() override { Clear(); }
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RefPtr<TextureClient> CreateTextureClientForCanvas(gfx::SurfaceFormat,
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gfx::IntSize,
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TextureFlags);
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void UseTexture(TextureClient*);
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};
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} // namespace layers
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} // namespace mozilla
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#endif
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