+#define GL_PROGRAM_BINARY_LENGTH_OES 0x8741
+#endif
+
+#ifndef GL_OES_texture_compression_astc
+#define GL_COMPRESSED_RGBA_ASTC_3x3x3_OES 0x93C0
+#define GL_COMPRESSED_RGBA_ASTC_4x3x3_OES 0x93C1
+#define GL_COMPRESSED_RGBA_ASTC_4x4x3_OES 0x93C2
+#define GL_COMPRESSED_RGBA_ASTC_4x4x4_OES 0x93C3
+#define GL_COMPRESSED_RGBA_ASTC_5x4x4_OES 0x93C4
+#define GL_COMPRESSED_RGBA_ASTC_5x5x4_OES 0x93C5
+#define GL_COMPRESSED_RGBA_ASTC_5x5x5_OES 0x93C6
+#define GL_COMPRESSED_RGBA_ASTC_6x5x5_OES 0x93C7
+#define GL_COMPRESSED_RGBA_ASTC_6x6x5_OES 0x93C8
+#define GL_COMPRESSED_RGBA_ASTC_6x6x6_OES 0x93C9
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES 0x93E0
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES 0x93E1
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES 0x93E2
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES 0x93E3
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES 0x93E4
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES 0x93E5
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES 0x93E6
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES 0x93E7
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES 0x93E8
+#define GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES 0x93E9
+#endif
+
+#ifndef GL_EXT_shader_framebuffer_fetch
+#define GL_FRAGMENT_SHADER_DISCARDS_SAMPLES_EXT 0x8A52
+#endif
+
+#ifndef GL_EXT_disjoint_timer_query
+#define GL_GPU_DISJOINT_EXT 0x8FBB
+#endif
+
+/* Inexplicably, GL_HALF_FLOAT_OES has a different value than GL_HALF_FLOAT.
+ */
+#ifndef GL_HALF_FLOAT_OES
+#define GL_HALF_FLOAT_OES 0x8D61