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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This clasis used together with TansportTextureHost in the renderer process
// to provide a mechanism for an object in the GPU process to create textures
// and be used in the renderer process.
//
// See content/gpu/transport_texture_host.h for usage and details.
#ifndef CONTENT_COMMON_GPU_TRANSPORT_TEXTURE_H_
#define CONTENT_COMMON_GPU_TRANSPORT_TEXTURE_H_
#include <vector>
#include <map>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/task.h"
#include "ipc/ipc_channel.h"
class GpuChannel;
namespace gpu {
namespace gles2 {
class GLES2Decoder;
} // namespace gles2
} // namespace gpu
class TransportTexture : public IPC::Channel::Listener {
public:
enum Format {
RGBA, // GL_RGBA
};
// |channel| is the owner of this object.
// |sender| is used to send send IPC messages.
// |decoder| is the decoder for GLES2 command buffer, used to convert texture
// IDs.
// |host_id| is ID of TransportTextureHost in Renderer process.
// |id| is ID of this object in GpuChannel.
TransportTexture(GpuChannel* channel,
IPC::Message::Sender* sender,
gpu::gles2::GLES2Decoder* decoder,
int32 host_id,
int32 route_id);
virtual ~TransportTexture();
// Create a set of textures of specified size and format. They will be
// stored in |textures| and |done_task| will be called.
// Textures IDs stored in |textures| are in the system GL context.
void CreateTextures(int n, int width, int height, Format format,
std::vector<int>* textures, Task* done_task);
// Release all textures that have previously been allocated.
void ReleaseTextures();
// Notify that the texture has been updated. Notification will be sent to the
// renderer process.
void TextureUpdated(int texture_id);
// IPC::Channel::Listener implementation.
virtual void OnChannelConnected(int32 peer_pid);
virtual void OnChannelError();
virtual bool OnMessageReceived(const IPC::Message& msg);
private:
// Mapping from service (GPU) IDs to client (Renderer) IDs.
typedef std::map<int, int> TextureMap;
///////////////////////////////////////////////////////////////////////////
// IPC Message Handlers
void OnDestroy();
void OnTexturesCreated(std::vector<int> textures);
GpuChannel* channel_;
IPC::Message::Sender* sender_;
gpu::gles2::GLES2Decoder* decoder_;
// ID of TransportTextureHost in the Renderer process.
int32 host_id_;
// ID of this object in GpuChannel.
int32 route_id_;
// Output pointer to write generated textures.
std::vector<int>* output_textures_;
// Task that gets called when textures are generated.
scoped_ptr<Task> create_task_;
// Mapping between service (GPU) IDs to client (Renderer) IDs.
TextureMap texture_map_;
DISALLOW_COPY_AND_ASSIGN(TransportTexture);
};
#endif // CONTENT_COMMON_GPU_TRANSPORT_TEXTURE_H_
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