Emulate GL_PRIMITIVE_RESTART_FIXED_INDEX: part I

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 7038 matching lines @@
       // it in each draw call, and attrib 0 generic data queries use cached
       // values instead of passing down to the underlying driver.
       RestoreStateForAttrib(0, false);
     }
   }
   return error::kNoError;
 }
 
 error::Error GLES2DecoderImpl::HandleDrawArrays(uint32 immediate_data_size,
                                                 const void* cmd_data) {
+  // TODO(zmo): crbug.com/481184
+  // On Desktop GL with versions lower than 4.3, we need to emulate
+  // GL_PRIMITIVE_RESTART_FIXED_INDEX using glPrimitiveRestartIndex().
   const cmds::DrawArrays& c = *static_cast<const cmds::DrawArrays*>(cmd_data);
   return DoDrawArrays("glDrawArrays",
                       false,
                       static_cast<GLenum>(c.mode),
                       static_cast<GLint>(c.first),
                       static_cast<GLsizei>(c.count),
                       1);
 }
 
 error::Error GLES2DecoderImpl::HandleDrawArraysInstancedANGLE(
@@ skipping 123 matching lines @@
       // it in each draw call, and attrib 0 generic data queries use cached
       // values instead of passing down to the underlying driver.
       RestoreStateForAttrib(0, false);
     }
   }
   return error::kNoError;
 }
 
 error::Error GLES2DecoderImpl::HandleDrawElements(uint32 immediate_data_size,
                                                   const void* cmd_data) {
+  // TODO(zmo): crbug.com/481184
+  // On Desktop GL with versions lower than 4.3, we need to emulate
+  // GL_PRIMITIVE_RESTART_FIXED_INDEX using glPrimitiveRestartIndex().
   const gles2::cmds::DrawElements& c =
       *static_cast<const gles2::cmds::DrawElements*>(cmd_data);
   return DoDrawElements("glDrawElements",
                         false,
                         static_cast<GLenum>(c.mode),
                         static_cast<GLsizei>(c.count),
                         static_cast<GLenum>(c.type),
                         static_cast<int32>(c.index_offset),
                         1);
 }
@@ skipping 5409 matching lines @@
   }
 }
 
 // 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