// Matrix Stack Implementation
#ifndef _GLES
-// #define SHADERS
+ #define SHADERS
#endif
-#if !defined(__ANDROID__) && !defined(__EMSCRIPTEN__) && !defined(__ODROID__)
+#if defined(__ANDROID__) || defined(__EMSCRIPTEN__) || defined(__ODROID__)
+ #include <GLES/gl.h>
+#else
# if defined(SHADERS)
# include "gl_core_3_3.h"
# else