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

ui/gl/gl_bindings.h

 // 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.
 
 #ifndef UI_GL_GL_BINDINGS_H_
 #define UI_GL_GL_BINDINGS_H_
 
 // Includes the platform independent and platform dependent GL headers.
 // Only include this in cc files. It pulls in system headers, including
 // the X11 headers on linux, which define all kinds of macros that are
@@ skipping 317 matching lines @@
 #define GL_CONTEXT_ROBUST_ACCESS_KHR      0x90F3
 #define GL_LOSE_CONTEXT_ON_RESET_KHR      0x8252
 #define GL_GUILTY_CONTEXT_RESET_KHR       0x8253
 #define GL_INNOCENT_CONTEXT_RESET_KHR     0x8254
 #define GL_UNKNOWN_CONTEXT_RESET_KHR      0x8255
 #define GL_RESET_NOTIFICATION_STRATEGY_KHR 0x8256
 #define GL_NO_RESET_NOTIFICATION_KHR      0x8261
 #define GL_CONTEXT_LOST_KHR               0x0507
 #endif /* GL_KHR_robustness */
 
+#ifndef GL_EXT_texture_norm16
+#define GL_EXT_texture_norm16 1
+#define GL_R16_EXT 0x822A
+#define GL_RG16_EXT 0x822C
+#define GL_RGBA16_EXT 0x805B
+#define GL_RGB16_EXT 0x8054
+#define GL_RGB16_SNORM_EXT 0x8F9A
+#endif /* GL_EXT_texture_norm16 */
+
 #ifndef GL_EXT_texture_rg
 #define GL_EXT_texture_rg 1
 #define GL_RED_EXT 0x1903
 #define GL_RG_EXT 0x8227
 #define GL_R8_EXT 0x8229
 #define GL_RG8_EXT 0x822B
 #endif /* GL_EXT_texture_rg */
 
 // This is from NV_path_rendering, but the Mesa GL header is not up to date with
 // the most recent
@@ skipping 146 matching lines @@
 #endif
 
 #if defined(USE_GLX)
 GL_EXPORT extern GLXApi* g_current_glx_context;
 GL_EXPORT extern DriverGLX g_driver_glx;
 #endif
 
 }  // namespace gl
 
 #endif  // UI_GL_GL_BINDINGS_H_