16-bit video upload to float: intermediate R16_EXT and copy to float.

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 1453 matching lines @@
       break;
     case GL_R8:
     case GL_R8_SNORM:
     case GL_R8UI:
     case GL_R8I:
       *r = 8;
       break;
     case GL_R16F:
     case GL_R16UI:
     case GL_R16I:
+    case GL_R16_EXT:
       *r = 16;
       break;
     case GL_R32F:
     case GL_R32UI:
     case GL_R32I:
       *r = 32;
       break;
     case GL_RG8:
     case GL_RG8_SNORM:
     case GL_RG8UI:
@@ skipping 274 matching lines @@
       }
       break;
     case GL_RED:
       switch (type) {
         case GL_UNSIGNED_BYTE:
           return GL_R8;
         case GL_HALF_FLOAT_OES:
           return GL_R16F;
         case GL_FLOAT:
           return GL_R32F;
+        case GL_UNSIGNED_SHORT:
+          return GL_R16_EXT;
         default:
           NOTREACHED();
           break;
       }
       break;
     case GL_RG:
       switch (type) {
         case GL_UNSIGNED_BYTE:
           return GL_RG8;
         case GL_HALF_FLOAT_OES:
@@ skipping 217 matching lines @@
     }
   }
 
   return true;
 }
 
 #include "gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu