Adam Strzelecki to SDL Currently SDL uses GL_RGB for internalFormat when GL_YCBCR_MESA is passed as format for glTextImage2D when using Linux Mesa's OpenGL. However this is wrong and makes glTextImage2D fail with invalid argument error. GL_YCBCR_MESA should be also internalFormat (not GL_RGB) there and this is what can be found googling various source codes using GL_YCBCR_MESA.

/*
 *  jumphack.c
 *  SDLiPhoneOS
 *
 */

#include "jumphack.h"

/* see SDL_uikitevents.m for more info */

/* stores the information we need to jump back */
jmp_buf env;

/* returns the jump environment for setting / getting purposes */
jmp_buf *
jump_env()
{
    return &env;
}