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

third_party/mesa/MesaLib/include/GL/glext.h

 #ifndef __glext_h_
 #define __glext_h_
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /*
 ** Copyright (c) 2007-2010 The Khronos Group Inc.
 ** 
@@ skipping 5001 matching lines @@
 #ifndef GL_NV_vdpau_interop
 #define GL_SURFACE_STATE_NV               0x86EB
 #define GL_SURFACE_REGISTERED_NV          0x86FD
 #define GL_SURFACE_MAPPED_NV              0x8700
 #define GL_WRITE_DISCARD_NV               0x88BE
 #endif
 
 #ifndef GL_AMD_transform_feedback3_lines_triangles
 #endif
 
+#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
 
 /*************************************************************/
 
 #include <stddef.h>
 #ifndef GL_VERSION_2_0
 /* GL type for program/shader text */
 typedef char GLchar;
 #endif
 
 #ifndef GL_VERSION_1_5
@@ skipping 5987 matching lines @@
 #ifndef GL_AMD_transform_feedback3_lines_triangles
 #define GL_AMD_transform_feedback3_lines_triangles 1
 #endif
 
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif