Plumb through EGL_NV_post_sub_buffer and GLX_MESA_copy_sub_buffer.

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 2011 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 5659 matching lines @@
       unpack_alignment_ = param;
       break;
   default:
       // Validation should have prevented us from getting here.
       NOTREACHED();
       break;
   }
   return error::kNoError;
 }
 
+error::Error GLES2DecoderImpl::HandlePostSubBufferCHROMIUM(
+    uint32 immediate_data_size, const gles2::PostSubBufferCHROMIUM& c) {
+  DCHECK(surface_->SupportsPostSubBuffer());

[piman, 2011/11/10 21:14:47]

I think this needs to be validated, not checked, causing a GL error
(INVALID_OPERATION ?) if not available. A malicious client (compromised
renderer, nacl) can still call this.

[jonathan.backer, 2011/11/10 21:40:32]

Done.

+  TRACE_EVENT0("gpu", "GLES2DecoderImpl::HandlePostSubBufferCHROMIUM");
+  if (surface_->PostSubBuffer(c.x, c.y, c.width, c.height))
+    return error::kNoError;
+  else
+    return error::kLostContext;
+}
+
 error::Error GLES2DecoderImpl::GetAttribLocationHelper(
     GLuint client_id, uint32 location_shm_id, uint32 location_shm_offset,
     const std::string& name_str) {
   if (!StringIsValidForGLES(name_str.c_str())) {
     SetGLError(GL_INVALID_VALUE, "glGetAttribLocation: Invalid character");
     return error::kNoError;
   }
   ProgramManager::ProgramInfo* info = GetProgramInfoNotShader(
       client_id, "glGetAttribLocation");
   if (!info) {
@@ skipping 1710 matching lines @@
   return error::kNoError;
 }
 
 // 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