gpu: Expose internal format R8 instead of RED.

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 <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 13140 matching lines @@
   source_texture->GetLevelType(source_texture->target(), 0, &source_type,
                                &source_internal_format);
 
   // The destination format should be GL_RGB, or GL_RGBA. GL_ALPHA,
   // GL_LUMINANCE, and GL_LUMINANCE_ALPHA are not supported because they are not
   // renderable on some platforms.
   bool valid_dest_format = dest_internal_format == GL_RGB ||
                            dest_internal_format == GL_RGBA ||
                            dest_internal_format == GL_BGRA_EXT;
   bool valid_source_format =
-      source_internal_format == GL_RED || source_internal_format == GL_ALPHA ||
-      source_internal_format == GL_RGB || source_internal_format == GL_RGBA ||
+      source_internal_format == GL_R8 || source_internal_format == GL_RED ||

[Daniele Castagna, 2016/02/22 22:53:43]

Also allowed GL_RED as source internal format in copyTextureCHROMIUM as
originally suggested by zmo@.

+      source_internal_format == GL_ALPHA || source_internal_format == GL_RGB ||
+      source_internal_format == GL_RGBA ||
       source_internal_format == GL_LUMINANCE ||
       source_internal_format == GL_LUMINANCE_ALPHA ||
       source_internal_format == GL_BGRA_EXT ||
       source_internal_format == GL_RGB_YCBCR_420V_CHROMIUM ||
       source_internal_format == GL_RGB_YCBCR_422_CHROMIUM;
   if (!valid_source_format || !valid_dest_format) {
     LOCAL_SET_GL_ERROR(GL_INVALID_OPERATION, function_name,
                        "invalid internal format");
     return false;
   }
@@ skipping 2574 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 "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu