struct gl_fragment_program_state {
	unsigned char _Enabled;
	struct gl_fragment_program *_TexEnvProgram;
};
struct gl_shader_state {
	struct gl_shader_program *CurrentProgram;
};
struct gl_constants {
	unsigned int MaxTextureUnits;
} GLvertexformat;
typedef struct {
	struct gl_constants Const;
	struct gl_fragment_program_state FragmentProgram;
	struct gl_shader_state Shader;
} GLcontext;
struct mode_opt {
};
struct state_key {
	unsigned int enabled_units;
	struct {
		unsigned int NumArgsRGB:2;
		unsigned int ModeRGB:4;
		struct mode_opt OptRGB[3];
		unsigned int ModeA:4;
	} unit[8];
};
struct ureg {
	unsigned int file:4;
	unsigned int idx:8;
};
struct texenv_fragment_program {
	struct ureg src_previous;
};
static struct ureg emit_combine(struct texenv_fragment_program *p,
				struct ureg dest, unsigned int mask,
				unsigned char saturate, unsigned int unit,
				unsigned int nr, unsigned int mode,
				const struct mode_opt *opt)
{
	struct ureg src[3];
	switch (mode) {
	case 6:{
			struct ureg tmp0;
			struct ureg neg1;
			struct ureg two;
			emit_arith(p, 0, tmp0, 0xf, 0, two, src[0], neg1);
		}
	}
}
static struct ureg emit_texenv(struct texenv_fragment_program *p,
			       unsigned int unit)
{
	struct state_key *key;
	unsigned char saturate;
	struct ureg out;
	struct ureg dest;
	if (key->unit[unit].ModeRGB == key->unit[unit].ModeA
	    && args_match(key, unit))
		out =
		    emit_combine(p, dest, 0xf, saturate, unit,
				 key->unit[unit].NumArgsRGB,
				 key->unit[unit].ModeRGB,
				 key->unit[unit].OptRGB);
}
static void create_new_program(GLcontext * ctx, struct state_key *key,
			       struct gl_fragment_program *program)
{
	struct texenv_fragment_program p;
	unsigned int unit;
	for (; unit < ctx->Const.MaxTextureUnits; ++unit)
		p.src_previous = emit_texenv(&p, unit);
}

_mesa_UpdateTexEnvProgram()
{
	GLcontext *ctx;
	struct state_key key;
	if (!ctx->FragmentProgram._Enabled)
		if (!ctx->Shader.CurrentProgram)
		if (!ctx->FragmentProgram._TexEnvProgram)
			create_new_program(ctx, &key,
					   ctx->FragmentProgram._TexEnvProgram);
}