gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc - chromium/src - Git at Google

 // 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.

 #include "gpu/command_buffer/service/gles2_cmd_decoder_passthrough.h"

 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "ui/gl/gl_version_info.h"

 namespace gpu {
 namespace gles2 {

 namespace {
 template <typename ClientType, typename ServiceType, typename DeleteFunction>
 void DeleteServiceObjects(ClientServiceMap<ClientType, ServiceType>* id_map,
                           bool have_context,
                           DeleteFunction delete_function) {
   if (have_context) {
     for (auto client_service_id_pair : *id_map) {
       delete_function(client_service_id_pair.second);
     }
   }

   id_map->Clear();
 }

 }  // anonymous namespace

 PassthroughResources::PassthroughResources() {}

 PassthroughResources::~PassthroughResources() {}

 void PassthroughResources::Destroy(bool have_context) {
   DeleteServiceObjects(&texture_id_map, have_context,
                        [](GLuint texture) { glDeleteTextures(1, &texture); });
   DeleteServiceObjects(&buffer_id_map, have_context,
                        [](GLuint buffer) { glDeleteBuffersARB(1, &buffer); });
   DeleteServiceObjects(
       &renderbuffer_id_map, have_context,
       [](GLuint renderbuffer) { glDeleteRenderbuffersEXT(1, &renderbuffer); });
   DeleteServiceObjects(&sampler_id_map, have_context,
                        [](GLuint sampler) { glDeleteSamplers(1, &sampler); });
   DeleteServiceObjects(&program_id_map, have_context,
                        [](GLuint program) { glDeleteProgram(program); });
   DeleteServiceObjects(&shader_id_map, have_context,
                        [](GLuint shader) { glDeleteShader(shader); });
   DeleteServiceObjects(&sync_id_map, have_context, [](uintptr_t sync) {
     glDeleteSync(reinterpret_cast<GLsync>(sync));
   });

   if (!have_context) {
     for (auto passthrough_texture : texture_object_map) {
       passthrough_texture.second->MarkContextLost();
     }
   }
   texture_object_map.clear();
 }

 GLES2DecoderPassthroughImpl::GLES2DecoderPassthroughImpl(ContextGroup* group)
     : commands_to_process_(0),
       debug_marker_manager_(),
       logger_(&debug_marker_manager_),
       surface_(),
       context_(),
       group_(group),
       feature_info_(group->feature_info()) {
   DCHECK(group);
 }

 GLES2DecoderPassthroughImpl::~GLES2DecoderPassthroughImpl() {}

 GLES2Decoder::Error GLES2DecoderPassthroughImpl::DoCommands(
     unsigned int num_commands,
     const volatile void* buffer,
     int num_entries,
     int* entries_processed) {
   commands_to_process_ = num_commands;
   error::Error result = error::kNoError;
   const volatile CommandBufferEntry* cmd_data =
       static_cast<const volatile CommandBufferEntry*>(buffer);
   int process_pos = 0;
   unsigned int command = 0;

   while (process_pos < num_entries && result == error::kNoError &&
          commands_to_process_--) {
     const unsigned int size = cmd_data->value_header.size;
     command = cmd_data->value_header.command;

     if (size == 0) {
       result = error::kInvalidSize;
       break;
     }

     // size can't overflow because it is 21 bits.
     if (static_cast<int>(size) + process_pos > num_entries) {
       result = error::kOutOfBounds;
       break;
     }

     const unsigned int arg_count = size - 1;
     unsigned int command_index = command - kFirstGLES2Command;
     if (command_index < arraysize(command_info)) {
       const CommandInfo& info = command_info[command_index];
       unsigned int info_arg_count = static_cast<unsigned int>(info.arg_count);
       if ((info.arg_flags == cmd::kFixed && arg_count == info_arg_count) ||
           (info.arg_flags == cmd::kAtLeastN && arg_count >= info_arg_count)) {
         uint32_t immediate_data_size = (arg_count - info_arg_count) *
                                        sizeof(CommandBufferEntry);  // NOLINT
         if (info.cmd_handler) {
           result = (this->*info.cmd_handler)(immediate_data_size, cmd_data);
         } else {
           result = error::kUnknownCommand;
         }
       } else {
         result = error::kInvalidArguments;
       }
     } else {
       result = DoCommonCommand(command, arg_count, cmd_data);
     }

     if (result != error::kDeferCommandUntilLater) {
       process_pos += size;
       cmd_data += size;
     }
   }

   if (entries_processed)
     *entries_processed = process_pos;

   return result;
 }

 const char* GLES2DecoderPassthroughImpl::GetCommandName(
     unsigned int command_id) const {
   if (command_id >= kFirstGLES2Command && command_id < kNumCommands) {
     return gles2::GetCommandName(static_cast<CommandId>(command_id));
   }
   return GetCommonCommandName(static_cast<cmd::CommandId>(command_id));
 }

 bool GLES2DecoderPassthroughImpl::Initialize(
     const scoped_refptr<gl::GLSurface>& surface,
     const scoped_refptr<gl::GLContext>& context,
     bool offscreen,
     const DisallowedFeatures& disallowed_features,
     const ContextCreationAttribHelper& attrib_helper) {
   // Take ownership of the context and surface. The surface can be replaced
   // with SetSurface.
   context_ = context;
   surface_ = surface;

   if (!group_->Initialize(this, attrib_helper.context_type,
                           disallowed_features)) {
     group_ = NULL;  // Must not destroy ContextGroup if it is not initialized.
     Destroy(true);
     return false;
   }

   image_manager_.reset(new ImageManager());

   bind_generates_resource_ = group_->bind_generates_resource();

   resources_ = group_->passthrough_resources();

   mailbox_manager_ = group_->mailbox_manager();

   // Query information about the texture units
   GLint num_texture_units = 0;
   glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &num_texture_units);

   active_texture_unit_ = 0;
   bound_textures_.resize(num_texture_units, 0);

   set_initialized();
   return true;
 }

 void GLES2DecoderPassthroughImpl::Destroy(bool have_context) {
   if (image_manager_.get()) {
     image_manager_->Destroy(have_context);
     image_manager_.reset();
   }

   DeleteServiceObjects(
       &framebuffer_id_map_, have_context,
       [](GLuint framebuffer) { glDeleteFramebuffersEXT(1, &framebuffer); });
   DeleteServiceObjects(&transform_feedback_id_map_, have_context,
                        [](GLuint transform_feedback) {
                          glDeleteTransformFeedbacks(1, &transform_feedback);
                        });
   DeleteServiceObjects(&query_id_map_, have_context,
                        [](GLuint query) { glDeleteQueries(1, &query); });
   DeleteServiceObjects(
       &vertex_array_id_map_, have_context,
       [](GLuint vertex_array) { glDeleteVertexArraysOES(1, &vertex_array); });

   if (group_) {
     group_->Destroy(this, have_context);
     group_ = nullptr;
   }
 }

 void GLES2DecoderPassthroughImpl::SetSurface(
     const scoped_refptr<gl::GLSurface>& surface) {
   DCHECK(context_->IsCurrent(nullptr));
   DCHECK(surface_.get());
   surface_ = surface;
 }

 void GLES2DecoderPassthroughImpl::ReleaseSurface() {
   if (!context_.get())
     return;
   if (WasContextLost()) {
     DLOG(ERROR) << "  GLES2DecoderImpl: Trying to release lost context.";
     return;
   }
   context_->ReleaseCurrent(surface_.get());
   surface_ = nullptr;
 }

 void GLES2DecoderPassthroughImpl::TakeFrontBuffer(const Mailbox& mailbox) {}

 void GLES2DecoderPassthroughImpl::ReturnFrontBuffer(const Mailbox& mailbox,
                                                     bool is_lost) {}

 bool GLES2DecoderPassthroughImpl::ResizeOffscreenFramebuffer(
     const gfx::Size& size) {
   return true;
 }

 bool GLES2DecoderPassthroughImpl::MakeCurrent() {
   if (!context_.get())
     return false;

   if (!context_->MakeCurrent(surface_.get())) {
     LOG(ERROR) << "  GLES2DecoderImpl: Context lost during MakeCurrent.";
     MarkContextLost(error::kMakeCurrentFailed);
     group_->LoseContexts(error::kUnknown);
     return false;
   }

   return true;
 }

 gpu::gles2::GLES2Util* GLES2DecoderPassthroughImpl::GetGLES2Util() {
   return nullptr;
 }

 gl::GLContext* GLES2DecoderPassthroughImpl::GetGLContext() {
   return nullptr;
 }

 gpu::gles2::ContextGroup* GLES2DecoderPassthroughImpl::GetContextGroup() {
   return group_.get();
 }

 const FeatureInfo* GLES2DecoderPassthroughImpl::GetFeatureInfo() const {
   return group_->feature_info();
 }

 gpu::Capabilities GLES2DecoderPassthroughImpl::GetCapabilities() {
   DCHECK(initialized());
   Capabilities caps;

   PopulateNumericCapabilities(&caps, feature_info_.get());

   caps.bind_generates_resource_chromium = group_->bind_generates_resource();
   caps.egl_image_external =
       feature_info_->feature_flags().oes_egl_image_external;
   caps.texture_format_astc =
       feature_info_->feature_flags().ext_texture_format_astc;
   caps.texture_format_atc =
       feature_info_->feature_flags().ext_texture_format_atc;
   caps.texture_format_bgra8888 =
       feature_info_->feature_flags().ext_texture_format_bgra8888;
   caps.texture_format_dxt1 =
       feature_info_->feature_flags().ext_texture_format_dxt1;
   caps.texture_format_dxt5 =
       feature_info_->feature_flags().ext_texture_format_dxt5;
   caps.texture_format_etc1 =
       feature_info_->feature_flags().oes_compressed_etc1_rgb8_texture;
   caps.texture_format_etc1_npot = caps.texture_format_etc1;
   caps.texture_rectangle = feature_info_->feature_flags().arb_texture_rectangle;
   caps.texture_usage = feature_info_->feature_flags().angle_texture_usage;
   caps.texture_storage = feature_info_->feature_flags().ext_texture_storage;
   caps.discard_framebuffer =
       feature_info_->feature_flags().ext_discard_framebuffer;
   caps.sync_query = feature_info_->feature_flags().chromium_sync_query;
 #if defined(OS_MACOSX)
   // This is unconditionally true on mac, no need to test for it at runtime.
   caps.iosurface = true;
 #endif
   caps.image = true;
   caps.flips_vertically = surface_->FlipsVertically();
   caps.blend_equation_advanced =
       feature_info_->feature_flags().blend_equation_advanced;
   caps.blend_equation_advanced_coherent =
       feature_info_->feature_flags().blend_equation_advanced_coherent;
   caps.texture_rg = feature_info_->feature_flags().ext_texture_rg;
   caps.texture_half_float_linear =
       feature_info_->feature_flags().enable_texture_half_float_linear;
   caps.image_ycbcr_422 =
       feature_info_->feature_flags().chromium_image_ycbcr_422;
   caps.image_ycbcr_420v =
       feature_info_->feature_flags().chromium_image_ycbcr_420v;
   caps.max_copy_texture_chromium_size =
       feature_info_->workarounds().max_copy_texture_chromium_size;
   caps.render_buffer_format_bgra8888 =
       feature_info_->feature_flags().ext_render_buffer_format_bgra8888;
   caps.occlusion_query_boolean =
       feature_info_->feature_flags().occlusion_query_boolean;

   // TODO:
   // caps.timer_queries
   // caps.post_sub_buffer
   // caps.commit_overlay_planes
   // caps.surfaceless
   // caps.is_offscreen
   // caps.flips_vertically

   return caps;
 }

 void GLES2DecoderPassthroughImpl::RestoreState(const ContextState* prev_state) {

 }

 void GLES2DecoderPassthroughImpl::RestoreActiveTexture() const {}

 void GLES2DecoderPassthroughImpl::RestoreAllTextureUnitBindings(
     const ContextState* prev_state) const {}

 void GLES2DecoderPassthroughImpl::RestoreActiveTextureUnitBinding(
     unsigned int target) const {}

 void GLES2DecoderPassthroughImpl::RestoreBufferBindings() const {}

 void GLES2DecoderPassthroughImpl::RestoreFramebufferBindings() const {}

 void GLES2DecoderPassthroughImpl::RestoreRenderbufferBindings() {}

 void GLES2DecoderPassthroughImpl::RestoreGlobalState() const {}

 void GLES2DecoderPassthroughImpl::RestoreProgramBindings() const {}

 void GLES2DecoderPassthroughImpl::RestoreTextureState(
     unsigned service_id) const {}

 void GLES2DecoderPassthroughImpl::RestoreTextureUnitBindings(
     unsigned unit) const {}

 void GLES2DecoderPassthroughImpl::RestoreAllExternalTextureBindingsIfNeeded() {}

 void GLES2DecoderPassthroughImpl::ClearAllAttributes() const {}

 void GLES2DecoderPassthroughImpl::RestoreAllAttributes() const {}

 void GLES2DecoderPassthroughImpl::SetIgnoreCachedStateForTest(bool ignore) {}

 void GLES2DecoderPassthroughImpl::SetForceShaderNameHashingForTest(bool force) {

 }

 size_t GLES2DecoderPassthroughImpl::GetSavedBackTextureCountForTest() {
   return 0;
 }

 size_t GLES2DecoderPassthroughImpl::GetCreatedBackTextureCountForTest() {
   return 0;
 }

 void GLES2DecoderPassthroughImpl::SetFenceSyncReleaseCallback(
     const FenceSyncReleaseCallback& callback) {
   fence_sync_release_callback_ = callback;
 }

 void GLES2DecoderPassthroughImpl::SetWaitFenceSyncCallback(
     const WaitFenceSyncCallback& callback) {
   wait_fence_sync_callback_ = callback;
 }

 void GLES2DecoderPassthroughImpl::SetDescheduleUntilFinishedCallback(
     const NoParamCallback& callback) {}

 void GLES2DecoderPassthroughImpl::SetRescheduleAfterFinishedCallback(
     const NoParamCallback& callback) {}

 gpu::gles2::QueryManager* GLES2DecoderPassthroughImpl::GetQueryManager() {
   return nullptr;
 }

 gpu::gles2::TransformFeedbackManager*
 GLES2DecoderPassthroughImpl::GetTransformFeedbackManager() {
   return nullptr;
 }

 gpu::gles2::VertexArrayManager*
 GLES2DecoderPassthroughImpl::GetVertexArrayManager() {
   return nullptr;
 }

 gpu::gles2::ImageManager* GLES2DecoderPassthroughImpl::GetImageManager() {
   return image_manager_.get();
 }

 bool GLES2DecoderPassthroughImpl::HasPendingQueries() const {
   return false;
 }

 void GLES2DecoderPassthroughImpl::ProcessPendingQueries(bool did_finish) {}

 bool GLES2DecoderPassthroughImpl::HasMoreIdleWork() const {
   return false;
 }

 void GLES2DecoderPassthroughImpl::PerformIdleWork() {}

 bool GLES2DecoderPassthroughImpl::HasPollingWork() const {
   return false;
 }

 void GLES2DecoderPassthroughImpl::PerformPollingWork() {}

 bool GLES2DecoderPassthroughImpl::GetServiceTextureId(
     uint32_t client_texture_id,
     uint32_t* service_texture_id) {
   return resources_->texture_id_map.GetServiceID(client_texture_id,
                                                  service_texture_id);
 }

 gpu::error::ContextLostReason
 GLES2DecoderPassthroughImpl::GetContextLostReason() {
   return error::kUnknown;
 }

 bool GLES2DecoderPassthroughImpl::ClearLevel(Texture* texture,
                                              unsigned target,
                                              int level,
                                              unsigned format,
                                              unsigned type,
                                              int xoffset,
                                              int yoffset,
                                              int width,
                                              int height) {
   return true;
 }

 bool GLES2DecoderPassthroughImpl::ClearCompressedTextureLevel(Texture* texture,
                                                               unsigned target,
                                                               int level,
                                                               unsigned format,
                                                               int width,
                                                               int height) {
   return true;
 }

 bool GLES2DecoderPassthroughImpl::IsCompressedTextureFormat(unsigned format) {
   return false;
 }

 bool GLES2DecoderPassthroughImpl::ClearLevel3D(Texture* texture,
                                                unsigned target,
                                                int level,
                                                unsigned format,
                                                unsigned type,
                                                int width,
                                                int height,
                                                int depth) {
   return true;
 }

 gpu::gles2::ErrorState* GLES2DecoderPassthroughImpl::GetErrorState() {
   return nullptr;
 }

 void GLES2DecoderPassthroughImpl::SetShaderCacheCallback(
     const ShaderCacheCallback& callback) {}

 void GLES2DecoderPassthroughImpl::WaitForReadPixels(base::Closure callback) {}

 uint32_t GLES2DecoderPassthroughImpl::GetTextureUploadCount() {
   return 0;
 }

 base::TimeDelta GLES2DecoderPassthroughImpl::GetTotalTextureUploadTime() {
   return base::TimeDelta();
 }

 base::TimeDelta GLES2DecoderPassthroughImpl::GetTotalProcessingCommandsTime() {
   return base::TimeDelta();
 }

 void GLES2DecoderPassthroughImpl::AddProcessingCommandsTime(base::TimeDelta) {}

 bool GLES2DecoderPassthroughImpl::WasContextLost() const {
   return false;
 }

 bool GLES2DecoderPassthroughImpl::WasContextLostByRobustnessExtension() const {
   return false;
 }

 void GLES2DecoderPassthroughImpl::MarkContextLost(
     error::ContextLostReason reason) {}

 gpu::gles2::Logger* GLES2DecoderPassthroughImpl::GetLogger() {
   return &logger_;
 }

 const gpu::gles2::ContextState* GLES2DecoderPassthroughImpl::GetContextState() {
   return nullptr;
 }

 scoped_refptr<ShaderTranslatorInterface>
 GLES2DecoderPassthroughImpl::GetTranslator(GLenum type) {
   return nullptr;
 }

 #define GLES2_CMD_OP(name)                                               \
   {                                                                      \
       &GLES2DecoderPassthroughImpl::Handle##name, cmds::name::kArgFlags, \
       cmds::name::cmd_flags,                                             \
       sizeof(cmds::name) / sizeof(CommandBufferEntry) - 1,               \
   }, /* NOLINT */

 const GLES2DecoderPassthroughImpl::CommandInfo
     GLES2DecoderPassthroughImpl::command_info[] = {
         GLES2_COMMAND_LIST(GLES2_CMD_OP)};

 #undef GLES2_CMD_OP

 }  // namespace gles2
 }  // namespace gpu
	// 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.

	#include "gpu/command_buffer/service/gles2_cmd_decoder_passthrough.h"

	#include "gpu/command_buffer/service/feature_info.h"
	#include "gpu/command_buffer/service/gl_utils.h"
	#include "ui/gl/gl_version_info.h"

	namespace gpu {
	namespace gles2 {

	namespace {
	template <typename ClientType, typename ServiceType, typename DeleteFunction>
	void DeleteServiceObjects(ClientServiceMap<ClientType, ServiceType>* id_map,
	bool have_context,
	DeleteFunction delete_function) {
	if (have_context) {
	for (auto client_service_id_pair : *id_map) {
	delete_function(client_service_id_pair.second);
	}
	}

	id_map->Clear();
	}

	} // anonymous namespace

	PassthroughResources::PassthroughResources() {}

	PassthroughResources::~PassthroughResources() {}

	void PassthroughResources::Destroy(bool have_context) {
	DeleteServiceObjects(&texture_id_map, have_context,
	[](GLuint texture) { glDeleteTextures(1, &texture); });
	DeleteServiceObjects(&buffer_id_map, have_context,
	[](GLuint buffer) { glDeleteBuffersARB(1, &buffer); });
	DeleteServiceObjects(
	&renderbuffer_id_map, have_context,
	[](GLuint renderbuffer) { glDeleteRenderbuffersEXT(1, &renderbuffer); });
	DeleteServiceObjects(&sampler_id_map, have_context,
	[](GLuint sampler) { glDeleteSamplers(1, &sampler); });
	DeleteServiceObjects(&program_id_map, have_context,
	[](GLuint program) { glDeleteProgram(program); });
	DeleteServiceObjects(&shader_id_map, have_context,
	[](GLuint shader) { glDeleteShader(shader); });
	DeleteServiceObjects(&sync_id_map, have_context, [](uintptr_t sync) {
	glDeleteSync(reinterpret_cast<GLsync>(sync));
	});

	if (!have_context) {
	for (auto passthrough_texture : texture_object_map) {
	passthrough_texture.second->MarkContextLost();
	}
	}
	texture_object_map.clear();
	}

	GLES2DecoderPassthroughImpl::GLES2DecoderPassthroughImpl(ContextGroup* group)
	: commands_to_process_(0),
	debug_marker_manager_(),
	logger_(&debug_marker_manager_),
	surface_(),
	context_(),
	group_(group),
	feature_info_(group->feature_info()) {
	DCHECK(group);
	}

	GLES2DecoderPassthroughImpl::~GLES2DecoderPassthroughImpl() {}

	GLES2Decoder::Error GLES2DecoderPassthroughImpl::DoCommands(
	unsigned int num_commands,
	const volatile void* buffer,
	int num_entries,
	int* entries_processed) {
	commands_to_process_ = num_commands;
	error::Error result = error::kNoError;
	const volatile CommandBufferEntry* cmd_data =
	static_cast<const volatile CommandBufferEntry*>(buffer);
	int process_pos = 0;
	unsigned int command = 0;

	while (process_pos < num_entries && result == error::kNoError &&
	commands_to_process_--) {
	const unsigned int size = cmd_data->value_header.size;
	command = cmd_data->value_header.command;

	if (size == 0) {
	result = error::kInvalidSize;
	break;
	}

	// size can't overflow because it is 21 bits.
	if (static_cast<int>(size) + process_pos > num_entries) {
	result = error::kOutOfBounds;
	break;
	}

	const unsigned int arg_count = size - 1;
	unsigned int command_index = command - kFirstGLES2Command;
	if (command_index < arraysize(command_info)) {
	const CommandInfo& info = command_info[command_index];
	unsigned int info_arg_count = static_cast<unsigned int>(info.arg_count);
	if ((info.arg_flags == cmd::kFixed && arg_count == info_arg_count) \|\|
	(info.arg_flags == cmd::kAtLeastN && arg_count >= info_arg_count)) {
	uint32_t immediate_data_size = (arg_count - info_arg_count) *
	sizeof(CommandBufferEntry); // NOLINT
	if (info.cmd_handler) {
	result = (this->*info.cmd_handler)(immediate_data_size, cmd_data);
	} else {
	result = error::kUnknownCommand;
	}
	} else {
	result = error::kInvalidArguments;
	}
	} else {
	result = DoCommonCommand(command, arg_count, cmd_data);
	}

	if (result != error::kDeferCommandUntilLater) {
	process_pos += size;
	cmd_data += size;
	}
	}

	if (entries_processed)
	*entries_processed = process_pos;

	return result;
	}

	const char* GLES2DecoderPassthroughImpl::GetCommandName(
	unsigned int command_id) const {
	if (command_id >= kFirstGLES2Command && command_id < kNumCommands) {
	return gles2::GetCommandName(static_cast<CommandId>(command_id));
	}
	return GetCommonCommandName(static_cast<cmd::CommandId>(command_id));
	}

	bool GLES2DecoderPassthroughImpl::Initialize(
	const scoped_refptr<gl::GLSurface>& surface,
	const scoped_refptr<gl::GLContext>& context,
	bool offscreen,
	const DisallowedFeatures& disallowed_features,
	const ContextCreationAttribHelper& attrib_helper) {
	// Take ownership of the context and surface. The surface can be replaced
	// with SetSurface.
	context_ = context;
	surface_ = surface;

	if (!group_->Initialize(this, attrib_helper.context_type,
	disallowed_features)) {
	group_ = NULL; // Must not destroy ContextGroup if it is not initialized.
	Destroy(true);
	return false;
	}

	image_manager_.reset(new ImageManager());

	bind_generates_resource_ = group_->bind_generates_resource();

	resources_ = group_->passthrough_resources();

	mailbox_manager_ = group_->mailbox_manager();

	// Query information about the texture units
	GLint num_texture_units = 0;
	glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &num_texture_units);

	active_texture_unit_ = 0;
	bound_textures_.resize(num_texture_units, 0);

	set_initialized();
	return true;
	}

	void GLES2DecoderPassthroughImpl::Destroy(bool have_context) {
	if (image_manager_.get()) {
	image_manager_->Destroy(have_context);
	image_manager_.reset();
	}

	DeleteServiceObjects(
	&framebuffer_id_map_, have_context,
	[](GLuint framebuffer) { glDeleteFramebuffersEXT(1, &framebuffer); });
	DeleteServiceObjects(&transform_feedback_id_map_, have_context,
	[](GLuint transform_feedback) {
	glDeleteTransformFeedbacks(1, &transform_feedback);
	});
	DeleteServiceObjects(&query_id_map_, have_context,
	[](GLuint query) { glDeleteQueries(1, &query); });
	DeleteServiceObjects(
	&vertex_array_id_map_, have_context,
	[](GLuint vertex_array) { glDeleteVertexArraysOES(1, &vertex_array); });

	if (group_) {
	group_->Destroy(this, have_context);
	group_ = nullptr;
	}
	}

	void GLES2DecoderPassthroughImpl::SetSurface(
	const scoped_refptr<gl::GLSurface>& surface) {
	DCHECK(context_->IsCurrent(nullptr));
	DCHECK(surface_.get());
	surface_ = surface;
	}

	void GLES2DecoderPassthroughImpl::ReleaseSurface() {
	if (!context_.get())
	return;
	if (WasContextLost()) {
	DLOG(ERROR) << " GLES2DecoderImpl: Trying to release lost context.";
	return;
	}
	context_->ReleaseCurrent(surface_.get());
	surface_ = nullptr;
	}

	void GLES2DecoderPassthroughImpl::TakeFrontBuffer(const Mailbox& mailbox) {}

	void GLES2DecoderPassthroughImpl::ReturnFrontBuffer(const Mailbox& mailbox,
	bool is_lost) {}

	bool GLES2DecoderPassthroughImpl::ResizeOffscreenFramebuffer(
	const gfx::Size& size) {
	return true;
	}

	bool GLES2DecoderPassthroughImpl::MakeCurrent() {
	if (!context_.get())
	return false;

	if (!context_->MakeCurrent(surface_.get())) {
	LOG(ERROR) << " GLES2DecoderImpl: Context lost during MakeCurrent.";
	MarkContextLost(error::kMakeCurrentFailed);
	group_->LoseContexts(error::kUnknown);
	return false;
	}

	return true;
	}

	gpu::gles2::GLES2Util* GLES2DecoderPassthroughImpl::GetGLES2Util() {
	return nullptr;
	}

	gl::GLContext* GLES2DecoderPassthroughImpl::GetGLContext() {
	return nullptr;
	}

	gpu::gles2::ContextGroup* GLES2DecoderPassthroughImpl::GetContextGroup() {
	return group_.get();
	}

	const FeatureInfo* GLES2DecoderPassthroughImpl::GetFeatureInfo() const {
	return group_->feature_info();
	}

	gpu::Capabilities GLES2DecoderPassthroughImpl::GetCapabilities() {
	DCHECK(initialized());
	Capabilities caps;

	PopulateNumericCapabilities(&caps, feature_info_.get());

	caps.bind_generates_resource_chromium = group_->bind_generates_resource();
	caps.egl_image_external =
	feature_info_->feature_flags().oes_egl_image_external;
	caps.texture_format_astc =
	feature_info_->feature_flags().ext_texture_format_astc;
	caps.texture_format_atc =
	feature_info_->feature_flags().ext_texture_format_atc;
	caps.texture_format_bgra8888 =
	feature_info_->feature_flags().ext_texture_format_bgra8888;
	caps.texture_format_dxt1 =
	feature_info_->feature_flags().ext_texture_format_dxt1;
	caps.texture_format_dxt5 =
	feature_info_->feature_flags().ext_texture_format_dxt5;
	caps.texture_format_etc1 =
	feature_info_->feature_flags().oes_compressed_etc1_rgb8_texture;
	caps.texture_format_etc1_npot = caps.texture_format_etc1;
	caps.texture_rectangle = feature_info_->feature_flags().arb_texture_rectangle;
	caps.texture_usage = feature_info_->feature_flags().angle_texture_usage;
	caps.texture_storage = feature_info_->feature_flags().ext_texture_storage;
	caps.discard_framebuffer =
	feature_info_->feature_flags().ext_discard_framebuffer;
	caps.sync_query = feature_info_->feature_flags().chromium_sync_query;
	#if defined(OS_MACOSX)
	// This is unconditionally true on mac, no need to test for it at runtime.
	caps.iosurface = true;
	#endif
	caps.image = true;
	caps.flips_vertically = surface_->FlipsVertically();
	caps.blend_equation_advanced =
	feature_info_->feature_flags().blend_equation_advanced;
	caps.blend_equation_advanced_coherent =
	feature_info_->feature_flags().blend_equation_advanced_coherent;
	caps.texture_rg = feature_info_->feature_flags().ext_texture_rg;
	caps.texture_half_float_linear =
	feature_info_->feature_flags().enable_texture_half_float_linear;
	caps.image_ycbcr_422 =
	feature_info_->feature_flags().chromium_image_ycbcr_422;
	caps.image_ycbcr_420v =
	feature_info_->feature_flags().chromium_image_ycbcr_420v;
	caps.max_copy_texture_chromium_size =
	feature_info_->workarounds().max_copy_texture_chromium_size;
	caps.render_buffer_format_bgra8888 =
	feature_info_->feature_flags().ext_render_buffer_format_bgra8888;
	caps.occlusion_query_boolean =
	feature_info_->feature_flags().occlusion_query_boolean;

	// TODO:
	// caps.timer_queries
	// caps.post_sub_buffer
	// caps.commit_overlay_planes
	// caps.surfaceless
	// caps.is_offscreen
	// caps.flips_vertically

	return caps;
	}

	void GLES2DecoderPassthroughImpl::RestoreState(const ContextState* prev_state) {

	}

	void GLES2DecoderPassthroughImpl::RestoreActiveTexture() const {}

	void GLES2DecoderPassthroughImpl::RestoreAllTextureUnitBindings(
	const ContextState* prev_state) const {}

	void GLES2DecoderPassthroughImpl::RestoreActiveTextureUnitBinding(
	unsigned int target) const {}

	void GLES2DecoderPassthroughImpl::RestoreBufferBindings() const {}

	void GLES2DecoderPassthroughImpl::RestoreFramebufferBindings() const {}

	void GLES2DecoderPassthroughImpl::RestoreRenderbufferBindings() {}

	void GLES2DecoderPassthroughImpl::RestoreGlobalState() const {}

	void GLES2DecoderPassthroughImpl::RestoreProgramBindings() const {}

	void GLES2DecoderPassthroughImpl::RestoreTextureState(
	unsigned service_id) const {}

	void GLES2DecoderPassthroughImpl::RestoreTextureUnitBindings(
	unsigned unit) const {}

	void GLES2DecoderPassthroughImpl::RestoreAllExternalTextureBindingsIfNeeded() {}

	void GLES2DecoderPassthroughImpl::ClearAllAttributes() const {}

	void GLES2DecoderPassthroughImpl::RestoreAllAttributes() const {}

	void GLES2DecoderPassthroughImpl::SetIgnoreCachedStateForTest(bool ignore) {}

	void GLES2DecoderPassthroughImpl::SetForceShaderNameHashingForTest(bool force) {

	}

	size_t GLES2DecoderPassthroughImpl::GetSavedBackTextureCountForTest() {
	return 0;
	}

	size_t GLES2DecoderPassthroughImpl::GetCreatedBackTextureCountForTest() {
	return 0;
	}

	void GLES2DecoderPassthroughImpl::SetFenceSyncReleaseCallback(
	const FenceSyncReleaseCallback& callback) {
	fence_sync_release_callback_ = callback;
	}

	void GLES2DecoderPassthroughImpl::SetWaitFenceSyncCallback(
	const WaitFenceSyncCallback& callback) {
	wait_fence_sync_callback_ = callback;
	}

	void GLES2DecoderPassthroughImpl::SetDescheduleUntilFinishedCallback(
	const NoParamCallback& callback) {}

	void GLES2DecoderPassthroughImpl::SetRescheduleAfterFinishedCallback(
	const NoParamCallback& callback) {}

	gpu::gles2::QueryManager* GLES2DecoderPassthroughImpl::GetQueryManager() {
	return nullptr;
	}

	gpu::gles2::TransformFeedbackManager*
	GLES2DecoderPassthroughImpl::GetTransformFeedbackManager() {
	return nullptr;
	}

	gpu::gles2::VertexArrayManager*
	GLES2DecoderPassthroughImpl::GetVertexArrayManager() {
	return nullptr;
	}

	gpu::gles2::ImageManager* GLES2DecoderPassthroughImpl::GetImageManager() {
	return image_manager_.get();
	}

	bool GLES2DecoderPassthroughImpl::HasPendingQueries() const {
	return false;
	}

	void GLES2DecoderPassthroughImpl::ProcessPendingQueries(bool did_finish) {}

	bool GLES2DecoderPassthroughImpl::HasMoreIdleWork() const {
	return false;
	}

	void GLES2DecoderPassthroughImpl::PerformIdleWork() {}

	bool GLES2DecoderPassthroughImpl::HasPollingWork() const {
	return false;
	}

	void GLES2DecoderPassthroughImpl::PerformPollingWork() {}

	bool GLES2DecoderPassthroughImpl::GetServiceTextureId(
	uint32_t client_texture_id,
	uint32_t* service_texture_id) {
	return resources_->texture_id_map.GetServiceID(client_texture_id,
	service_texture_id);
	}

	gpu::error::ContextLostReason
	GLES2DecoderPassthroughImpl::GetContextLostReason() {
	return error::kUnknown;
	}

	bool GLES2DecoderPassthroughImpl::ClearLevel(Texture* texture,
	unsigned target,
	int level,
	unsigned format,
	unsigned type,
	int xoffset,
	int yoffset,
	int width,
	int height) {
	return true;
	}

	bool GLES2DecoderPassthroughImpl::ClearCompressedTextureLevel(Texture* texture,
	unsigned target,
	int level,
	unsigned format,
	int width,
	int height) {
	return true;
	}

	bool GLES2DecoderPassthroughImpl::IsCompressedTextureFormat(unsigned format) {
	return false;
	}

	bool GLES2DecoderPassthroughImpl::ClearLevel3D(Texture* texture,
	unsigned target,
	int level,
	unsigned format,
	unsigned type,
	int width,
	int height,
	int depth) {
	return true;
	}

	gpu::gles2::ErrorState* GLES2DecoderPassthroughImpl::GetErrorState() {
	return nullptr;
	}

	void GLES2DecoderPassthroughImpl::SetShaderCacheCallback(
	const ShaderCacheCallback& callback) {}

	void GLES2DecoderPassthroughImpl::WaitForReadPixels(base::Closure callback) {}

	uint32_t GLES2DecoderPassthroughImpl::GetTextureUploadCount() {
	return 0;
	}

	base::TimeDelta GLES2DecoderPassthroughImpl::GetTotalTextureUploadTime() {
	return base::TimeDelta();
	}

	base::TimeDelta GLES2DecoderPassthroughImpl::GetTotalProcessingCommandsTime() {
	return base::TimeDelta();
	}

	void GLES2DecoderPassthroughImpl::AddProcessingCommandsTime(base::TimeDelta) {}

	bool GLES2DecoderPassthroughImpl::WasContextLost() const {
	return false;
	}

	bool GLES2DecoderPassthroughImpl::WasContextLostByRobustnessExtension() const {
	return false;
	}

	void GLES2DecoderPassthroughImpl::MarkContextLost(
	error::ContextLostReason reason) {}

	gpu::gles2::Logger* GLES2DecoderPassthroughImpl::GetLogger() {
	return &logger_;
	}

	const gpu::gles2::ContextState* GLES2DecoderPassthroughImpl::GetContextState() {
	return nullptr;
	}

	scoped_refptr<ShaderTranslatorInterface>
	GLES2DecoderPassthroughImpl::GetTranslator(GLenum type) {
	return nullptr;
	}

	#define GLES2_CMD_OP(name) \
	{ \
	&GLES2DecoderPassthroughImpl::Handle##name, cmds::name::kArgFlags, \
	cmds::name::cmd_flags, \
	sizeof(cmds::name) / sizeof(CommandBufferEntry) - 1, \
	}, /* NOLINT */

	const GLES2DecoderPassthroughImpl::CommandInfo
	GLES2DecoderPassthroughImpl::command_info[] = {
	GLES2_COMMAND_LIST(GLES2_CMD_OP)};

	#undef GLES2_CMD_OP

	} // namespace gles2
	} // namespace gpu