static void
fz_saturation_rgb(int *bdr, int *bdg, int *bdb, int sr, int sg, int sb)
{
int tr, tg, tb;
setsat(*bdr, *bdg, *bdb, sat(sr, sg, sb), &tr, &tg, &tb);
setlum(tr, tg, tb, lum(*bdr, *bdg, *bdb), bdr, bdg, bdb);
}
void tone(){
double maxl=0;
double a=0.8;
for(int y=0;y<screenHeight;y++){
for(int x=0;x<screenWidth;x++){
double l=lum(image[y*screenWidth+x]);
maxl=maxl>l?maxl:l;
}
}
for(int y=0;y<screenHeight;y++){
for(int x=0;x<screenWidth;x++){
double l=lum(image[y*screenWidth+x]);
double d=l*a/(l*a-l+maxl);
image[y*screenWidth+x]=image[y*screenWidth+x]*d;
}
}
double t=1;
}
static void
clipcolor(int r, int g, int b, int *dr, int *dg, int *db)
{
int l = lum(r, g, b);
int n = MIN(MIN(r, g), b);
int x = MAX(MAX(r, g), b);
if (n < 0) {
*dr = l + 255 * (r - l) / (l - n);
*dg = l + 255 * (g - l) / (l - n);
*db = l + 255 * (b - l) / (l - n);
}
else {
*dr = l + 255 * (255 - l) / (x - l);
*dg = l + 255 * (255 - l) / (x - l);
*db = l + 255 * (255 - l) / (x - l);
}
}
static void
fz_luminosity_rgb(int *bdr, int *bdg, int *bdb, int sr, int sg, int sb)
{
setlum(*bdr, *bdg, *bdb, lum(sr, sg, sb), bdr, bdg, bdb);
}
static void
fz_color_rgb(int *bdr, int *bdg, int *bdb, int sr, int sg, int sb)
{
setlum(sr, sg, sb, lum(*bdr, *bdg, *bdb), bdr, bdg, bdb);
}
static void
setlum(int r, int g, int b, int l, int *dr, int *dg, int *db)
{
int d = 255 - lum(r, g, b);
clipcolor(r + d, g + d, b + d, dr, dg, db);
}
