Reland of Select correct copy method for DoCopySubTexture

gpu/command_buffer/common/gles2_cmd_utils.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.
 
 // This file is here so other GLES2 related files can have a common set of
 // includes where appropriate.
 
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 
 #include <GLES2/gl2.h>
@@ skipping 1291 matching lines @@
     case GL_RG16UI:
     case GL_RG16I:
     case GL_RG32UI:
     case GL_RG32I:
       return true;
     default:
       return false;
   }
 }
 
+GLint GLES2Util::GetColorEncodingFromInternalFormat(uint32_t internalformat) {
+  switch (internalformat) {
+    case GL_SRGB_EXT:
+    case GL_SRGB_ALPHA_EXT:
+    case GL_SRGB8:
+    case GL_SRGB8_ALPHA8:
+      return GL_SRGB;
+    default:
+      return GL_LINEAR;
+  }
+}
+
 void GLES2Util::GetColorFormatComponentSizes(
     uint32_t internal_format, uint32_t type, int* r, int* g, int* b, int* a) {
   DCHECK(r && g && b && a);
   *r = 0;
   *g = 0;
   *b = 0;
   *a = 0;
 
   switch (internal_format) {
     case GL_LUMINANCE:
@@ skipping 630 matching lines @@
     }
   }
 
   return true;
 }
 
 #include "gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu