[gl_util.h] Adding function to get uniforms

src/gl_util.h

@@ -0,0 +1,22 @@
+#ifndef GL_UTIL_H
+#define GL_UTIL_H
+
+int32_t get_uniform_or_exit(uint32_t prog, const char *name);
+
+#if defined(GL_UTIL_IMP) || defined(IMP)
+
+int32_t
+get_uniform_or_exit(uint32_t prog, const char *name)
+{
+	int32_t uni = glGetUniformLocation(prog, name);
+	if ( uni == -1 ) {
+		fprintf(stderr, "Failed getting %s uniform location\n", name);
+		exit(EXIT_FAILURE);
+	}
+	printf("Got %s -> %d\n", name, uni);
+	return uni;
+}
+
+#endif /* defined(GL_UTIL_IMP) || defined(IMP) */
+
+#endif