forked from mirrors/gecko-dev
3021defc28
This change adds support for CanvasContext presenting WebGPU via CPU readback. The presentation is handled mostly on GPU process side by managing a list of staging buffers and copying the contents into a WR external image (backed by an external buffer). Differential Revision: https://phabricator.services.mozilla.com/D68032 --HG-- extra : moz-landing-system : lando
114 lines
3.5 KiB
C++
114 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; 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 GPU_CanvasContext_H_
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#define GPU_CanvasContext_H_
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#include "nsICanvasRenderingContextInternal.h"
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#include "nsWrapperCache.h"
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#include "ObjectModel.h"
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#include "SwapChain.h"
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#include "mozilla/webrender/WebRenderAPI.h"
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namespace mozilla {
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namespace dom {
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class Promise;
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} // namespace dom
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namespace layers {
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class WebRenderLocalCanvasData;
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};
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namespace webgpu {
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class Device;
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class SwapChain;
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class Texture;
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class CanvasContext final : public nsICanvasRenderingContextInternal,
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public nsWrapperCache {
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private:
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virtual ~CanvasContext();
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void Cleanup();
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public:
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// nsISupports interface + CC
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(CanvasContext)
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CanvasContext();
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JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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void RemoveSwapChain();
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Maybe<wr::ImageKey> GetImageKey() const;
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wr::ImageKey CreateImageKey(layers::RenderRootStateManager* aManager);
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bool UpdateWebRenderLocalCanvasData(
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layers::WebRenderLocalCanvasData* aCanvasData);
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const wr::ExternalImageId mExternalImageId;
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public: // nsICanvasRenderingContextInternal
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int32_t GetWidth() override { return mWidth; }
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int32_t GetHeight() override { return mHeight; }
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NS_IMETHOD SetDimensions(int32_t aWidth, int32_t aHeight) override {
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mWidth = aWidth;
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mHeight = aHeight;
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return NS_OK;
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}
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NS_IMETHOD InitializeWithDrawTarget(
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nsIDocShell* aShell, NotNull<gfx::DrawTarget*> aTarget) override {
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return NS_OK;
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}
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mozilla::UniquePtr<uint8_t[]> GetImageBuffer(int32_t* aFormat) override {
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MOZ_CRASH("todo");
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}
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NS_IMETHOD GetInputStream(const char* aMimeType,
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const nsAString& aEncoderOptions,
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nsIInputStream** aStream) override {
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*aStream = nullptr;
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return NS_OK;
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}
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already_AddRefed<mozilla::gfx::SourceSurface> GetSurfaceSnapshot(
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gfxAlphaType* aOutAlphaType) override {
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return nullptr;
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}
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void SetOpaqueValueFromOpaqueAttr(bool aOpaqueAttrValue) override {}
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bool GetIsOpaque() override { return true; }
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NS_IMETHOD Reset() override { return NS_OK; }
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already_AddRefed<Layer> GetCanvasLayer(nsDisplayListBuilder* aBuilder,
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Layer* aOldLayer,
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LayerManager* aManager) override;
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bool UpdateWebRenderCanvasData(nsDisplayListBuilder* aBuilder,
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WebRenderCanvasData* aCanvasData) override;
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void MarkContextClean() override {}
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NS_IMETHOD Redraw(const gfxRect& aDirty) override { return NS_OK; }
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NS_IMETHOD SetIsIPC(bool aIsIPC) override { return NS_OK; }
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void DidRefresh() override {}
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void MarkContextCleanForFrameCapture() override {}
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bool IsContextCleanForFrameCapture() override { return false; }
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public:
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RefPtr<SwapChain> ConfigureSwapChain(const dom::GPUSwapChainDescriptor& aDesc,
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ErrorResult& aRv);
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private:
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uint32_t mWidth = 0, mHeight = 0;
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RefPtr<SwapChain> mSwapChain;
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RefPtr<layers::RenderRootStateManager> mRenderRootStateManager;
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Maybe<wr::ImageKey> mImageKey;
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};
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} // namespace webgpu
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} // namespace mozilla
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#endif // GPU_CanvasContext_H_
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