gpu/command_buffer/service/context_group.h


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// Copyright (c) 2012 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.

#ifndef GPU_COMMAND_BUFFER_SERVICE_CONTEXT_GROUP_H_
#define GPU_COMMAND_BUFFER_SERVICE_CONTEXT_GROUP_H_

#include <string>
#include "base/basictypes.h"
#include "base/hash_tables.h"
#include "base/memory/linked_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "gpu/command_buffer/common/gles2_cmd_format.h"
#include "gpu/command_buffer/service/gles2_cmd_validation.h"
#include "gpu/command_buffer/service/feature_info.h"
#include "gpu/gpu_export.h"

namespace gpu {

class IdAllocatorInterface;

namespace gles2 {

class BufferManager;
class GLES2Decoder;
class FramebufferManager;
class MailboxManager;
class RenderbufferManager;
class ProgramManager;
class ShaderManager;
class TextureManager;
struct DisallowedFeatures;

// A Context Group helps manage multiple GLES2Decoders that share
// resources.
class GPU_EXPORT ContextGroup : public base::RefCounted<ContextGroup> {
 public:
  typedef scoped_refptr<ContextGroup> Ref;

  explicit ContextGroup(MailboxManager* mailbox_manager,
                        bool bind_generates_resource);
  ~ContextGroup();

  // This should only be called by GLES2Decoder. This must be paired with a
  // call to destroy if it succeeds.
  bool Initialize(const DisallowedFeatures& disallowed_features,
                  const char* allowed_features);

  // Destroys all the resources when called for the last context in the group.
  // It should only be called by GLES2Decoder.
  void Destroy(bool have_context);

  MailboxManager* mailbox_manager() const {
    return mailbox_manager_.get();
  }

  bool bind_generates_resource() {
    return bind_generates_resource_;
  }

  uint32 max_vertex_attribs() const {
    return max_vertex_attribs_;
  }

  uint32 max_texture_units() const {
    return max_texture_units_;
  }

  uint32 max_texture_image_units() const {
    return max_texture_image_units_;
  }

  uint32 max_vertex_texture_image_units() const {
    return max_vertex_texture_image_units_;
  }

  uint32 max_fragment_uniform_vectors() const {
    return max_fragment_uniform_vectors_;
  }

  uint32 max_varying_vectors() const {
    return max_varying_vectors_;
  }

  uint32 max_vertex_uniform_vectors() const {
    return max_vertex_uniform_vectors_;
  }

  FeatureInfo* feature_info() {
    return feature_info_.get();
  }

  BufferManager* buffer_manager() const {
    return buffer_manager_.get();
  }

  FramebufferManager* framebuffer_manager() const {
    return framebuffer_manager_.get();
  }

  RenderbufferManager* renderbuffer_manager() const {
    return renderbuffer_manager_.get();
  }

  TextureManager* texture_manager() const {
    return texture_manager_.get();
  }

  ProgramManager* program_manager() const {
    return program_manager_.get();
  }

  ShaderManager* shader_manager() const {
    return shader_manager_.get();
  }

  IdAllocatorInterface* GetIdAllocator(unsigned namespace_id);

 private:
  bool CheckGLFeature(GLint min_required, GLint* v);
  bool CheckGLFeatureU(GLint min_required, uint32* v);
  bool QueryGLFeature(GLenum pname, GLint min_required, GLint* v);
  bool QueryGLFeatureU(GLenum pname, GLint min_required, uint32* v);

  scoped_refptr<MailboxManager> mailbox_manager_;

  // Whether or not this context is initialized.
  int num_contexts_;
  bool enforce_gl_minimums_;
  bool bind_generates_resource_;

  uint32 max_vertex_attribs_;
  uint32 max_texture_units_;
  uint32 max_texture_image_units_;
  uint32 max_vertex_texture_image_units_;
  uint32 max_fragment_uniform_vectors_;
  uint32 max_varying_vectors_;
  uint32 max_vertex_uniform_vectors_;

  scoped_ptr<BufferManager> buffer_manager_;

  scoped_ptr<FramebufferManager> framebuffer_manager_;

  scoped_ptr<RenderbufferManager> renderbuffer_manager_;

  scoped_ptr<TextureManager> texture_manager_;

  scoped_ptr<ProgramManager> program_manager_;

  scoped_ptr<ShaderManager> shader_manager_;

  linked_ptr<IdAllocatorInterface>
      id_namespaces_[id_namespaces::kNumIdNamespaces];

  FeatureInfo::Ref feature_info_;

  DISALLOW_COPY_AND_ASSIGN(ContextGroup);
};

}  // namespace gles2
}  // namespace gpu

#endif  // GPU_COMMAND_BUFFER_SERVICE_CONTEXT_GROUP_H_