Fix ReadPixels implementation specific read format/type on desktop GL.

gpu/command_buffer/build_gles2_cmd_buffer.py

 #!/usr/bin/env python
 # 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.
 
 """code generator for GLES2 command buffers."""
 
 import itertools
 import os
 import os.path
@@ skipping 1490 matching lines @@
     ],
   },
   'ReadPixelFormat': {
     'type': 'GLenum',
     'valid': [
       'GL_ALPHA',
       'GL_RGB',
       'GL_RGBA',
     ],
     'valid_es3': [
+      'GL_RED',
+      'GL_RED_INTEGER',
+      'GL_RG',
+      'GL_RG_INTEGER',
+      'GL_RGB_INTEGER',
       'GL_RGBA_INTEGER',
     ],
-    'deprecated_es3': [
-      'GL_ALPHA',
-      'GL_RGB',
-    ],
   },
   'PixelType': {
     'type': 'GLenum',
     'valid': [
       'GL_UNSIGNED_BYTE',
       'GL_UNSIGNED_SHORT_5_6_5',
       'GL_UNSIGNED_SHORT_4_4_4_4',
       'GL_UNSIGNED_SHORT_5_5_5_1',
     ],
     'valid_es3': [
@@ skipping 66 matching lines @@
     ]
   },
   'ReadPixelType': {
     'type': 'GLenum',
     'valid': [
       'GL_UNSIGNED_BYTE',
       'GL_UNSIGNED_SHORT_5_6_5',
       'GL_UNSIGNED_SHORT_4_4_4_4',
       'GL_UNSIGNED_SHORT_5_5_5_1',
     ],
-    'invalid': [
+    'valid_es3': [
+      'GL_BYTE',
+      'GL_UNSIGNED_SHORT',
       'GL_SHORT',
-    ],
-    'valid_es3': [
       'GL_UNSIGNED_INT',
       'GL_INT',
+      'GL_HALF_FLOAT',
       'GL_FLOAT',
       'GL_UNSIGNED_INT_2_10_10_10_REV',
     ],
-    'deprecated_es3': [
-      'GL_UNSIGNED_SHORT_5_6_5',
-      'GL_UNSIGNED_SHORT_4_4_4_4',
-      'GL_UNSIGNED_SHORT_5_5_5_1',
-    ],
   },
   'RenderBufferFormat': {
     'type': 'GLenum',
     'valid': [
       'GL_RGBA4',
       'GL_RGB565',
       'GL_RGB5_A1',
       'GL_DEPTH_COMPONENT16',
       'GL_STENCIL_INDEX8',
     ],
@@ skipping 9434 matching lines @@
   Format(gen.generated_cpp_filenames)
 
   if gen.errors > 0:
     print "%d errors" % gen.errors
     return 1
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))