+/*
+ * ???. GLX_MESA_allocate_memory
+ */
+#ifndef GLX_MESA_allocate_memory
+#define GLX_MESA_allocate_memory 1
+
+extern void *glXAllocateMemoryMESA(Display *dpy, int scrn, size_t size, float readfreq, float writefreq, float priority);
+extern void glXFreeMemoryMESA(Display *dpy, int scrn, void *pointer);
+extern GLuint glXGetMemoryOffsetMESA(Display *dpy, int scrn, const void *pointer);
+typedef void * ( * PFNGLXALLOCATEMEMORYMESAPROC) (Display *dpy, int scrn, size_t size, float readfreq, float writefreq, float priority);
+typedef void ( * PFNGLXFREEMEMORYMESAPROC) (Display *dpy, int scrn, void *pointer);
+typedef GLuint (* PFNGLXGETMEMORYOFFSETMESAPROC) (Display *dpy, int scrn, const void *pointer);
+
+#endif /* GLX_MESA_allocate_memory */
+
+
+/*
+ * ARB ?. GLX_ARB_render_texture
+ * XXX This was never finalized!
+ */
+#ifndef GLX_ARB_render_texture
+#define GLX_ARB_render_texture 1
+
+extern Bool glXBindTexImageARB(Display *dpy, GLXPbuffer pbuffer, int buffer);
+extern Bool glXReleaseTexImageARB(Display *dpy, GLXPbuffer pbuffer, int buffer);
+extern Bool glXDrawableAttribARB(Display *dpy, GLXDrawable draw, const int *attribList);
+
+#endif /* GLX_ARB_render_texture */
+
+
+/*
+ * Remove this when glxext.h is updated.
+ */
+#ifndef GLX_NV_float_buffer
+#define GLX_NV_float_buffer 1
+
+#define GLX_FLOAT_COMPONENTS_NV 0x20B0
+
+#endif /* GLX_NV_float_buffer */
+
+
+
+/*
+ * #?. GLX_MESA_swap_frame_usage
+ */
+#ifndef GLX_MESA_swap_frame_usage
+#define GLX_MESA_swap_frame_usage 1
+
+extern int glXGetFrameUsageMESA(Display *dpy, GLXDrawable drawable, float *usage);
+extern int glXBeginFrameTrackingMESA(Display *dpy, GLXDrawable drawable);
+extern int glXEndFrameTrackingMESA(Display *dpy, GLXDrawable drawable);
+extern int glXQueryFrameTrackingMESA(Display *dpy, GLXDrawable drawable, int64_t *swapCount, int64_t *missedFrames, float *lastMissedUsage);
+
+typedef int (*PFNGLXGETFRAMEUSAGEMESAPROC) (Display *dpy, GLXDrawable drawable, float *usage);
+typedef int (*PFNGLXBEGINFRAMETRACKINGMESAPROC)(Display *dpy, GLXDrawable drawable);
+typedef int (*PFNGLXENDFRAMETRACKINGMESAPROC)(Display *dpy, GLXDrawable drawable);
+typedef int (*PFNGLXQUERYFRAMETRACKINGMESAPROC)(Display *dpy, GLXDrawable drawable, int64_t *swapCount, int64_t *missedFrames, float *lastMissedUsage);
+
+#endif /* GLX_MESA_swap_frame_usage */
+
+
+
+/*
+ * #?. GLX_MESA_swap_control
+ */
+#ifndef GLX_MESA_swap_control
+#define GLX_MESA_swap_control 1
+
+extern int glXSwapIntervalMESA(unsigned int interval);
+extern int glXGetSwapIntervalMESA(void);
+
+typedef int (*PFNGLXSWAPINTERVALMESAPROC)(unsigned int interval);
+typedef int (*PFNGLXGETSWAPINTERVALMESAPROC)(void);