Add basic GL functionality to the passthrough command buffer.

gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc

 // 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 {
 
+PassthroughResources::PassthroughResources() {}
+
+PassthroughResources::~PassthroughResources() {}

[piman, 2016/09/13 01:07:32]

If there are still resources in here, they should be deleted (assuming the
context is current), otherwise they will leak.

[Geoff Lang, 2016/09/13 17:49:57]

Done, fixed the destruction logic.  asserts are now firing when the
PassthroughTexture object is destroyed when there is no GL context.

+
 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);
 }
@@ skipping 82 matching lines @@
 
   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());
 
+  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();
   }
 }
@@ skipping 42 matching lines @@
 
 gpu::gles2::GLES2Util* GLES2DecoderPassthroughImpl::GetGLES2Util() {
   return nullptr;
 }
 
 gl::GLContext* GLES2DecoderPassthroughImpl::GetGLContext() {
   return nullptr;
 }
 
 gpu::gles2::ContextGroup* GLES2DecoderPassthroughImpl::GetContextGroup() {
-  return nullptr;
+  return group_.get();
 }
 
 const FeatureInfo* GLES2DecoderPassthroughImpl::GetFeatureInfo() const {
-  return nullptr;
+  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 =
@@ skipping 94 matching lines @@
 
 size_t GLES2DecoderPassthroughImpl::GetSavedBackTextureCountForTest() {
   return 0;
 }
 
 size_t GLES2DecoderPassthroughImpl::GetCreatedBackTextureCountForTest() {
   return 0;
 }
 
 void GLES2DecoderPassthroughImpl::SetFenceSyncReleaseCallback(
-    const FenceSyncReleaseCallback& callback) {}
+    const FenceSyncReleaseCallback& callback) {
+  fence_sync_release_callback_ = callback;
+}
 
 void GLES2DecoderPassthroughImpl::SetWaitFenceSyncCallback(
-    const WaitFenceSyncCallback& callback) {}
+    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;
 }
@@ skipping 26 matching lines @@
 
 bool GLES2DecoderPassthroughImpl::HasPollingWork() const {
   return false;
 }
 
 void GLES2DecoderPassthroughImpl::PerformPollingWork() {}
 
 bool GLES2DecoderPassthroughImpl::GetServiceTextureId(
     uint32_t client_texture_id,
     uint32_t* service_texture_id) {
-  return false;
+  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,
@@ skipping 85 matching lines @@
   }, /* NOLINT */
 
 const GLES2DecoderPassthroughImpl::CommandInfo
     GLES2DecoderPassthroughImpl::command_info[] = {
         GLES2_COMMAND_LIST(GLES2_CMD_OP)};
 
 #undef GLES2_CMD_OP
 
 }  // namespace gles2
 }  // namespace gpu