Add basic GL functionality to the passthrough command buffer.

gpu/command_buffer/service/gles2_cmd_decoder_passthrough.h

 // Copyright (c) 2016 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 file contains the GLES2DecoderPassthroughImpl class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_PASSTHROUGH_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_PASSTHROUGH_H_
 
 #include "base/memory/ref_counted.h"
 #include "gpu/command_buffer/common/debug_marker_manager.h"
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/common/mailbox.h"
+#include "gpu/command_buffer/service/client_service_map.h"
 #include "gpu/command_buffer/service/context_group.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/command_buffer/service/image_manager.h"
 #include "gpu/command_buffer/service/logger.h"
+#include "gpu/command_buffer/service/mailbox_manager.h"
+#include "gpu/command_buffer/service/texture_manager.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_image.h"
 #include "ui/gl/gl_surface.h"
 
 namespace gpu {
 namespace gles2 {
 
 class ContextGroup;
 
+struct PassthroughResources {
+  PassthroughResources();
+  ~PassthroughResources();
+
+  // Mappings from client side IDs to service side IDs.
+  ClientServiceMap<GLuint, GLuint> texture_id_map;
+  ClientServiceMap<GLuint, GLuint> buffer_id_map;
+  ClientServiceMap<GLuint, GLuint> renderbuffer_id_map;
+  ClientServiceMap<GLuint, GLuint> sampler_id_map;
+  ClientServiceMap<GLuint, GLuint> program_id_map;
+  ClientServiceMap<GLuint, GLuint> shader_id_map;
+
+  static_assert(sizeof(uintptr_t) == sizeof(GLsync),
+                "GLsync not the same size as uintptr_t");
+  ClientServiceMap<GLuint, uintptr_t> sync_id_map;
+
+  // Mapping of client texture IDs to TexturePassthrough objects used to make
+  // sure all textures used by mailboxes are not deleted until all textures
+  // using the mailbox are deleted
+  std::unordered_map<GLuint, scoped_refptr<TexturePassthrough>>
+      texture_object_map;
+};
+
 class GLES2DecoderPassthroughImpl : public GLES2Decoder {
  public:
   explicit GLES2DecoderPassthroughImpl(ContextGroup* group);
   ~GLES2DecoderPassthroughImpl() override;
 
   Error DoCommands(unsigned int num_commands,
                    const volatile void* buffer,
                    int num_entries,
                    int* entries_processed) override;
 
@@ skipping 202 matching lines @@
   scoped_refptr<gl::GLSurface> surface_;
   scoped_refptr<gl::GLContext> context_;
 
   // Managers
   std::unique_ptr<ImageManager> image_manager_;
 
   // The ContextGroup for this decoder uses to track resources.
   scoped_refptr<ContextGroup> group_;
   scoped_refptr<FeatureInfo> feature_info_;
 
+  // Callbacks
+  FenceSyncReleaseCallback fence_sync_release_callback_;
+  WaitFenceSyncCallback wait_fence_sync_callback_;
+
+  // Mappings from client side IDs to service side IDs for shared objects
+  PassthroughResources* resources_;
+
+  // Mappings from client side IDs to service side IDs for per-context objects
+  ClientServiceMap<GLuint, GLuint> framebuffer_id_map_;
+  ClientServiceMap<GLuint, GLuint> transform_feedback_id_map_;
+  ClientServiceMap<GLuint, GLuint> query_id_map_;
+  ClientServiceMap<GLuint, GLuint> vertex_array_id_map_;
+
+  // Mailboxes
+  scoped_refptr<MailboxManager> mailbox_manager_;
+
+  // State tracking of currently bound 2D textures (client IDs)
+  size_t active_texture_unit_;
+  std::vector<GLuint> bound_textures_;
+
 // Include the prototypes of all the doer functions from a separate header to
 // keep this file clean.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_passthrough_doer_prototypes.h"
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_PASSTHROUGH_H_