func GetCompressedTexImage(target uint32, level int32, img unsafe.Pointer) {
	C.glowGetCompressedTexImage(gpGetCompressedTexImage, (C.GLenum)(target), (C.GLint)(level), img)
}
func GetCompressedTexImage(target uint32, level int32, img unsafe.Pointer) {
	C.glowGetCompressedTexImage(gpGetCompressedTexImage, (C.GLenum)(target), (C.GLint)(level), img)
}
func GetCompressedTexImage ( target uint32 , level int32 , img unsafe . Pointer ) { C . glowGetCompressedTexImage ( gpGetCompressedTexImage , ( C . GLenum ) ( target ) , ( C . GLint ) ( level ) , img ) }
// return a compressed texture image
return a compressed texture image