memset(i->buffer, 255, i->width*i->height*4);
for(y=0,yv=0;y<i->height;y++,yv+=ym) {
int*src = &((int*)i->vrbuffer)[(yv>>16)*i->video->width];
memset(i->buffer, 255, i->width*i->height*4);
for(y=0,yv=0;y<i->height;y++,yv+=ym) {
int*src = &((int*)i->vrbuffer)[(yv>>16)*i->video->width];