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81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef MOJO_GPU_TEXTURE_CACHE_H_
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#define MOJO_GPU_TEXTURE_CACHE_H_
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#include <GLES2/gl2.h>
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#include <deque>
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#include <map>
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#include "base/macros.h"
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#include "base/memory/scoped_ptr.h"
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#include "base/memory/weak_ptr.h"
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#include "mojo/public/cpp/bindings/binding.h"
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#include "mojo/services/surfaces/interfaces/surfaces.mojom.h"
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namespace mojo {
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class GLContext;
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class GLTexture;
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class Size;
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// Represents a cache of textures which can be drawn to and submitted to a
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// surface.
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// Each |texture| in the cache has an associated |resource_id| which must be
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// used when the texture is submitted to a surface via a
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// TransferableResourcePtr. This class must also be hooked up to the surface as
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// a ResourceReturner such that the resources are properly marked as available
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// to be used again.
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class TextureCache : public mojo::ResourceReturner {
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public:
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class TextureInfo {
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public:
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TextureInfo();
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TextureInfo(scoped_ptr<mojo::GLTexture> texture, uint32_t resource_id);
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~TextureInfo();
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scoped_ptr<mojo::GLTexture> Texture() { return texture_.Pass(); }
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uint32_t ResourceId() { return resource_id_; }
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private:
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scoped_ptr<mojo::GLTexture> texture_;
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uint32_t resource_id_;
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DISALLOW_COPY_AND_ASSIGN(TextureInfo);
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};
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// Returns the ResourceReturner to be given to the surface the textures will
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// be uploaded to via |out_resource_returner|.
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TextureCache(base::WeakPtr<mojo::GLContext> gl_context,
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mojo::ResourceReturnerPtr* out_resource_returner);
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~TextureCache() override;
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// Returns a texture for the given size. If no texture is available the
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// scoped_ptr will be empty.
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scoped_ptr<TextureInfo> GetTexture(const mojo::Size& requested_size);
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// Notifies the TextureCache to expect the given resource to be returned
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// shortly.
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void NotifyPendingResourceReturn(uint32_t resource_id,
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scoped_ptr<mojo::GLTexture> texture);
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private:
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// mojo::ResourceReturner
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void ReturnResources(
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mojo::Array<mojo::ReturnedResourcePtr> resources) override;
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base::WeakPtr<mojo::GLContext> gl_context_;
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mojo::Binding<mojo::ResourceReturner> returner_binding_;
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std::deque<uint32_t> available_textures_;
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std::map<uint32_t, scoped_ptr<mojo::GLTexture>> resource_to_texture_map_;
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std::map<uint32_t, GLuint> resource_to_sync_point_map_;
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uint32_t next_resource_id_;
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DISALLOW_COPY_AND_ASSIGN(TextureCache);
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};
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} // namespace mojo
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#endif // MOJO_GPU_TEXTURE_CACHE_H_
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