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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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
#ifndef MOZILLA_GFX_CANVASCLIENT_H
#define MOZILLA_GFX_CANVASCLIENT_H
#include "mozilla/Assertions.h" // for MOZ_ASSERT, etc
#include "mozilla/Attributes.h" // for override
#include "mozilla/RefPtr.h" // for RefPtr, already_AddRefed
#include "mozilla/layers/CompositableClient.h" // for CompositableClient
#include "mozilla/layers/CompositorTypes.h" // for TextureInfo, etc
#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor
#include "mozilla/layers/TextureClient.h" // for TextureClient, etc
#include "mozilla/layers/PersistentBufferProvider.h"
#include "mozilla/MaybeOneOf.h"
#include "mozilla/mozalloc.h" // for operator delete
#include "mozilla/gfx/Point.h" // for IntSize
#include "mozilla/gfx/Types.h" // for SurfaceFormat
namespace mozilla {
namespace layers {
class CompositableForwarder;
/**
* Compositable client for 2d and webgl canvas.
*/
class CanvasClient final : public CompositableClient {
int32_t mFrameID = 0;
RefPtr<TextureClient> mFrontBuffer;
public:
/**
* Creates, configures, and returns a new canvas client. If necessary, a
* message will be sent to the compositor to create a corresponding image
* host.
*/
CanvasClient(CompositableForwarder* aFwd, const TextureFlags flags)
: CompositableClient(aFwd, flags) {}
virtual ~CanvasClient() = default;
void Clear() { mFrontBuffer = nullptr; }
bool AddTextureClient(TextureClient* aTexture) override {
++mFrameID;
return CompositableClient::AddTextureClient(aTexture);
}
TextureInfo GetTextureInfo() const override {
return TextureInfo(CompositableType::IMAGE, ImageUsageType::Canvas,
mTextureFlags);
}
void OnDetach() override { Clear(); }
RefPtr<TextureClient> CreateTextureClientForCanvas(gfx::SurfaceFormat,
gfx::IntSize,
TextureFlags);
void UseTexture(TextureClient*);
};
} // namespace layers
} // namespace mozilla
#endif