void *omega_func(void *p)
{
bool doAlpha = false;
pthread_mutex_lock(&alphaSpin);
if(!initFlag) {
initFlag = true;
doAlpha = true;
}
pthread_mutex_unlock(&alphaSpin);
if (doAlpha) {
alpha_func(NULL);
} else {
puts("omega!");
}
pthread_exit(NULL);
}
/* Single-buffering draw_alpha */
static void draw_alpha(int x, int y, int w, int h, unsigned char *src,
unsigned char *srca, int stride)
{
char *dst = (char *)inpage + (y * in_width + x) * in_depth;
alpha_func(w, h, src, srca, stride, dst, in_width * in_depth);
}