egl: Implement EGL_NOK_texture_from_pixmap

This extension allows a color buffer to be used for both rendering and
texturing.  EGL allows the use of color buffers of pbuffer drawables
for texturing, this extension extends this to allow the use of color
buffers of pixmaps too.

include/EGL/eglext.h

@@ -239,6 +239,13 @@ typedef EGLBoolean (EGLAPIENTRYP PFNEGLSWAPBUFFERSREGIONNOK) (EGLDisplay dpy, EG
 #endif
 
 
+#ifndef EGL_NOK_texture_from_pixmap
+#define EGL_NOK_texture_from_pixmap 1
+
+#define EGL_Y_INVERTED_NOK			0x307F
+#endif /* EGL_NOK_texture_from_pixmap */
+
+
 #ifdef __cplusplus
 }
 #endif