gpu: Generate mailboxes on client side

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // 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.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 9987 matching lines @@
     texture->SetImmutable(true);
   }
 }
 
 error::Error GLES2DecoderImpl::HandleGenMailboxCHROMIUM(
     uint32 immediate_data_size, const cmds::GenMailboxCHROMIUM& c) {
   return error::kUnknownCommand;
 }
 
 void GLES2DecoderImpl::DoProduceTextureCHROMIUM(GLenum target,
-                                                const GLbyte* mailbox) {
+                                                const GLbyte* data) {
   TRACE_EVENT2("gpu", "GLES2DecoderImpl::DoProduceTextureCHROMIUM",
       "context", logger_.GetLogPrefix(),
-      "mailbox[0]", static_cast<unsigned char>(mailbox[0]));
+      "mailbox[0]", static_cast<unsigned char>(data[0]));
+
+  const Mailbox& mailbox = *reinterpret_cast<const Mailbox*>(data);
+  DLOG_IF(ERROR, !mailbox.Verify()) << "ProduceTextureCHROMIUM was passed a "
+                                       "mailbox that was not generated by "
+                                       "GenMailboxCHROMIUM.";
 
   TextureRef* texture_ref = texture_manager()->GetTextureInfoForTarget(
       &state_, target);
   if (!texture_ref) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glProduceTextureCHROMIUM", "unknown texture for target");
     return;
   }
 
   Texture* produced = texture_manager()->Produce(texture_ref);
   if (!produced) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glProduceTextureCHROMIUM", "invalid texture");
     return;
   }
 
-  group_->mailbox_manager()->ProduceTexture(
-      target,
-      *reinterpret_cast<const Mailbox*>(mailbox),
-      produced);
+  group_->mailbox_manager()->ProduceTexture(target, mailbox, produced);
 }
 
 void GLES2DecoderImpl::DoConsumeTextureCHROMIUM(GLenum target,
-                                                const GLbyte* mailbox) {
+                                                const GLbyte* data) {
   TRACE_EVENT2("gpu", "GLES2DecoderImpl::DoConsumeTextureCHROMIUM",
       "context", logger_.GetLogPrefix(),
-      "mailbox[0]", static_cast<unsigned char>(mailbox[0]));
+      "mailbox[0]", static_cast<unsigned char>(data[0]));
+  const Mailbox& mailbox = *reinterpret_cast<const Mailbox*>(data);
+  DLOG_IF(ERROR, !mailbox.Verify()) << "ConsumeTextureCHROMIUM was passed a "
+                                       "mailbox that was not generated by "
+                                       "GenMailboxCHROMIUM.";
 
   scoped_refptr<TextureRef> texture_ref =
       texture_manager()->GetTextureInfoForTargetUnlessDefault(&state_, target);
   if (!texture_ref.get()) {
     LOCAL_SET_GL_ERROR(GL_INVALID_OPERATION,
                        "glConsumeTextureCHROMIUM",
                        "unknown texture for target");
     return;
   }
   GLuint client_id = texture_ref->client_id();
   if (!client_id) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glConsumeTextureCHROMIUM", "unknown texture for target");
     return;
   }
-  Texture* texture =
-      group_->mailbox_manager()->ConsumeTexture(
-      target,
-      *reinterpret_cast<const Mailbox*>(mailbox));
+  Texture* texture = group_->mailbox_manager()->ConsumeTexture(target, mailbox);
   if (!texture) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glConsumeTextureCHROMIUM", "invalid mailbox name");
     return;
   }
   if (texture->target() != target) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glConsumeTextureCHROMIUM", "invalid target");
@@ skipping 466 matching lines @@
   DoDidUseTexImageIfNeeded(texture, texture->target());
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu