Get real GPU memory values on NV+Linux and OS X

third_party/khronos/GLES2/gl2ext.h

 #ifndef __gl2ext_h_
 #define __gl2ext_h_
 
 /* $Revision: 16619 $ on $Date:: 2012-01-18 10:00:14 -0800 #$ */
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /*
@@ skipping 555 matching lines @@
 
 /* GL_NV_read_stencil */
 /* No new tokens introduced by this extension. */
 
 /* GL_NV_texture_compression_s3tc_update */
 /* No new tokens introduced by this extension. */
 
 /* GL_NV_texture_npot_2D_mipmap */
 /* No new tokens introduced by this extension. */
 
+/* GL_NVX_gpu_memory_info */
+#ifndef GL_NVX_gpu_memory_info
+#define GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX                 0x9047
+#define GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX           0x9048
+#define GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX         0x9049
+#define GL_GPU_MEMORY_INFO_EVICTION_COUNT_NVX                   0x904A
+#define GL_GPU_MEMORY_INFO_EVICTED_MEMORY_NVX                   0x904B
+#endif
+
 /*------------------------------------------------------------------------*
  * QCOM extension tokens
  *------------------------------------------------------------------------*/
 
 /* GL_QCOM_alpha_test */
 #ifndef GL_QCOM_alpha_test
 #define GL_ALPHA_TEST_QCOM                                      0x0BC0
 #define GL_ALPHA_TEST_FUNC_QCOM                                 0x0BC1
 #define GL_ALPHA_TEST_REF_QCOM                                  0x0BC2
 #endif
@@ skipping 1440 matching lines @@
 #else
 typedef void (GL_APIENTRYP PFNGLBINDUNIFORMLOCATIONCHROMIUM) (GLuint program, GLint location, const GLchar* name);
 #endif
 #endif
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* __gl2ext_h_ */