+# ifdef BACKBUFFER_OPENGL
+ void *backbuffer_data;
+ GLsizei backbuffer_len;
+
+ GLsizei gl_texture_w, gl_texture_h;
+
+ GLuint backbuffer_texture;
+ GLenum gl_texture_target;
+ GLenum gl_pixel_format, gl_pixel_type;
+# ifndef USE_IPHONE
+ BOOL double_buffered_p, gl_apple_client_storage_p;
+# else // USE_IPHONE
+ BOOL gl_limited_npot_p;
+ GLuint gl_framebuffer, gl_renderbuffer;
+# endif // USE_IPHONE