зеркало из https://github.com/mozilla/gecko-dev.git
120 строки
3.9 KiB
C++
120 строки
3.9 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_IMAGECLIENT_H
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#define MOZILLA_GFX_IMAGECLIENT_H
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#include <stdint.h> // for uint32_t, uint64_t
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#include <sys/types.h> // for int32_t
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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/gfx/Types.h" // for SurfaceFormat
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#include "mozilla/layers/CompositableClient.h" // for CompositableClient
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#include "mozilla/layers/CompositorTypes.h" // for CompositableType, 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/mozalloc.h" // for operator delete
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#include "nsCOMPtr.h" // for already_AddRefed
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#include "nsRect.h" // for mozilla::gfx::IntRect
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namespace mozilla {
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namespace layers {
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class CompositableForwarder;
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class Image;
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class ImageContainer;
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class ImageClientSingle;
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/**
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* Image clients are used by basic image layers on the content thread, they
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* always match with an ImageHost on the compositor thread. See
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* CompositableClient.h for information on connecting clients to hosts.
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*/
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class ImageClient : public CompositableClient {
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public:
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/**
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* Creates, configures, and returns a new image 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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static already_AddRefed<ImageClient> CreateImageClient(
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CompositableType aImageHostType, CompositableForwarder* aFwd,
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TextureFlags aFlags);
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virtual ~ImageClient() = default;
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/**
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* Update this ImageClient from aContainer in aLayer
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* returns false if this is the wrong kind of ImageClient for aContainer.
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* Note that returning true does not necessarily imply success
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*/
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virtual bool UpdateImage(ImageContainer* aContainer,
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uint32_t aContentFlags) = 0;
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/**
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* asynchronously remove all the textures used by the image client.
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*
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*/
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virtual void FlushAllImages() {}
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virtual void RemoveTexture(TextureClient* aTexture) override;
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virtual ImageClientSingle* AsImageClientSingle() { return nullptr; }
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static already_AddRefed<TextureClient> CreateTextureClientForImage(
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Image* aImage, KnowsCompositor* aForwarder);
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uint32_t GetLastUpdateGenerationCounter() {
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return mLastUpdateGenerationCounter;
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}
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virtual RefPtr<TextureClient> GetForwardedTexture() { return nullptr; }
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protected:
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ImageClient(CompositableForwarder* aFwd, TextureFlags aFlags,
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CompositableType aType);
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CompositableType mType;
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uint32_t mLastUpdateGenerationCounter;
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};
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/**
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* An image client which uses a single texture client.
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*/
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class ImageClientSingle : public ImageClient {
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public:
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ImageClientSingle(CompositableForwarder* aFwd, TextureFlags aFlags,
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CompositableType aType);
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bool UpdateImage(ImageContainer* aContainer, uint32_t aContentFlag) override;
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void OnDetach() override;
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bool AddTextureClient(TextureClient* aTexture) override;
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TextureInfo GetTextureInfo() const override;
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void FlushAllImages() override;
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ImageClientSingle* AsImageClientSingle() override { return this; }
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RefPtr<TextureClient> GetForwardedTexture() override;
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bool IsEmpty() { return mBuffers.IsEmpty(); }
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protected:
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struct Buffer {
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RefPtr<TextureClient> mTextureClient;
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int32_t mImageSerial;
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};
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nsTArray<Buffer> mBuffers;
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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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