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// 242.rene -- does 3-source chroma keying with transparency.
// by r. luke dubois (luke@music.columbia.edu),
// computer music center, columbia university, 2001.
// for rene beekman.
//
// Pd / Framestein port by Olaf Matthes <olaf.matthes@gmx.de>, June 2002
//
// objects and source are provided without warranty of any kind, express or implied.
//
// usage: rene <red> <green> <blue> <fuzzi red> <fuzzi green> <fuzzi blue> <redfloor> <greenfloor> <bluefloor>
//
// f1 is the key & target, f2 is the mask
//
#include <stdio.h>
#include <string.h>
#include "plugin.h"
INFO("242.rene -- does 3-source chroma keying with transparency")
void perform_effect(struct frame f, struct args a)
{
printf("Using keyscreen as effect does nothing!\n");
}
void perform_copy(struct frame f1, struct frame f2, struct args a)
{
short x, y, w, h;
pixel16 *pix1_16, *pix2_16;
pixel24 *pix1_24, *pix2_24;
pixel32 *pix1_32, *pix2_32;
byte redpix, greenpix, bluepix, rkeyed, gkeyed, bkeyed;
byte red, green, blue, check, rf, gf, bf, rfl, gfl, bfl;
float lum, keylum, lowfuzz, highfuzz, lowfloor, highfloor, coeff;
char *t;
w = f1.width<f2.width ? f1.width : f2.width;
h = f1.height<f2.height ? f1.height : f2.height;
// get params
if(!a.s) return;
red = atoi(a.s);
if(!(t = strstr(a.s, " "))) return;
green = atoi(t+1);
if(!(t = strstr(t+1, " "))) return;
blue = atoi(t+1);
if(!(t = strstr(t+1, " "))) return;
rf = atoi(t+1);
if(!(t = strstr(t+1, " "))) return;
gf = atoi(t+1);
if(!(t = strstr(t+1, " "))) return;
bf = atoi(t+1);
if(!(t = strstr(t+1, " "))) return;
rfl = atoi(t+1);
if(!(t = strstr(t+1, " "))) return;
gfl = atoi(t+1);
if(!(t = strstr(t+1, " "))) return;
bfl = atoi(t+1);
printf("rene: r%d g%d b%d rg%d gf%d bf%d rfl%d gfl%d bfl%d\n",
red, green, blue, rf, gf, bf, rfl, gfl, bfl);
// key all channels simultaneously
switch(f1.pixelformat)
{
case 16:
for(y = 0; y < h; y++)
{
pix1_16 = scanline16(f1, y);
pix2_16 = scanline16(f2, y);
for(x = 0; x < w; x++)
{
check = 0; // start with each pixel anew
redpix = r16(pix2_16[x]);
greenpix = g16(pix2_16[x]);
bluepix = b16(pix2_16[x]);
if ((redpix>=(red-rf))&&(redpix<=(red+rf))&&(greenpix>=(green-gf))&&(greenpix<=(green+gf))&&(bluepix>=(blue-bf))&&(bluepix<=(blue+bf)))
{
check = 1; // mask it
}
if ((redpix<(red-rfl))||(redpix>(red+rfl))&&(greenpix<(green-gfl))||(greenpix>(green+gfl))&&(bluepix<(blue-bfl))||(bluepix>(blue+bfl)))
{
check = 2; // target it
}
if (!check)
{
lum = (redpix + greenpix + bluepix) / 3.0;
keylum = (red + blue + green) / 3.0;
lowfuzz = (rf + gf + bf) / 3.0;
if (lowfuzz < 0.0) lowfuzz = 0.0;
highfuzz = (rf + gf + bf) / 3.0;
if (highfuzz > 1.0) highfuzz = 1.0;
lowfloor = keylum - ((rfl + gfl + bfl) / 3.0);
if (lowfloor < 0.0) lowfloor = 0.;
highfloor = keylum + (rfl + gfl + bfl) / 3.0;
if (highfloor > 1.0) highfloor = 1.0;
if (lum < keylum)
{
coeff = ((lum - lowfloor) / (keylum - lowfuzz));
}
if (lum >= keylum)
{
coeff = ((255 - lum - highfloor) / (255 - keylum - highfuzz));
}
rkeyed = ((float)r16(pix2_16[x]) * coeff) + ((float)r16(pix1_16[x]) * (1.0 - coeff));
gkeyed = ((float)g16(pix2_16[x]) * coeff) + ((float)g16(pix1_16[x]) * (1.0 - coeff));
bkeyed = ((float)b16(pix2_16[x]) * coeff) + ((float)b16(pix1_16[x]) * (1.0 - coeff));
pix2_16[x] = rgbtocolor16(rkeyed, gkeyed, bkeyed);
}
if (check==1)
{ // was pix3
// pix2_16[x] = rgbtocolor16(r16(pix2_16[x]), g16(pix2_16[x]), b16(pix2_16[x]));
}
if (check==2)
{ // was pix2
pix2_16[x] = rgbtocolor16(r16(pix1_16[x]), g16(pix1_16[x]), b16(pix1_16[x]));
}
}
}
break;
case 24:
for(y = 0; y < h; y++)
{
pix1_24 = scanline24(f1, y);
pix2_24 = scanline24(f2, y);
for(x = 0; x < w; x++)
{
check = 0; // start with each pixel anew
redpix = r24(pix2_24[x]);
greenpix = g24(pix2_24[x]);
bluepix = b24(pix2_24[x]);
if ((redpix>=(red-rf))&&(redpix<=(red+rf))&&(greenpix>=(green-gf))&&(greenpix<=(green+gf))&&(bluepix>=(blue-bf))&&(bluepix<=(blue+bf)))
{
check = 1; // mask it
}
if ((redpix<(red-rfl))||(redpix>(red+rfl))&&(greenpix<(green-gfl))||(greenpix>(green+gfl))&&(bluepix<(blue-bfl))||(bluepix>(blue+bfl)))
{
check = 2; // target it
}
if (!check)
{
lum = (redpix + greenpix + bluepix) / 3.0;
keylum = (red + blue + green) / 3.0;
lowfuzz = (rf + gf + bf) / 3.0;
if (lowfuzz < 0.0) lowfuzz = 0.0;
highfuzz = (rf + gf + bf) / 3.0;
if (highfuzz > 1.0) highfuzz = 1.0;
lowfloor = keylum - ((rfl + gfl + bfl) / 3.0);
if (lowfloor < 0.0) lowfloor = 0.;
highfloor = keylum + (rfl + gfl + bfl) / 3.0;
if (highfloor > 1.0) highfloor = 1.0;
if (lum < keylum)
{
coeff = ((lum - lowfloor) / (keylum - lowfuzz));
}
if (lum >= keylum)
{
coeff = ((255 - lum - highfloor) / (255 - keylum - highfuzz));
}
rkeyed = ((float)r24(pix2_24[x]) * coeff) + ((float)r24(pix1_24[x]) * (1.0 - coeff));
gkeyed = ((float)g24(pix2_24[x]) * coeff) + ((float)g24(pix1_24[x]) * (1.0 - coeff));
bkeyed = ((float)b24(pix2_24[x]) * coeff) + ((float)b24(pix1_24[x]) * (1.0 - coeff));
pix2_24[x] = rgbtocolor24(rkeyed, gkeyed, bkeyed);
}
if (check==1)
{ // was pix3
// pix2_24[x] = rgbtocolor24(r24(pix2_24[x]), g24(pix2_24[x]), b24(pix2_24[x]));
}
if (check==2)
{ // was pix2
pix2_24[x] = rgbtocolor24(r24(pix1_24[x]), g24(pix1_24[x]), b24(pix1_24[x]));
}
}
}
break;
case 32:
for(y = 0; y < h; y++)
{
pix1_32 = scanline32(f1, y);
pix2_32 = scanline32(f2, y);
for(x = 0; x < w; x++)
{
check = 0; // start with each pixel anew
redpix = r32(pix2_32[x]);
greenpix = g32(pix2_32[x]);
bluepix = b32(pix2_32[x]);
if ((redpix>=(red-rf))&&(redpix<=(red+rf))&&(greenpix>=(green-gf))&&(greenpix<=(green+gf))&&(bluepix>=(blue-bf))&&(bluepix<=(blue+bf)))
{
check = 1; // mask it
}
if ((redpix<(red-rfl))||(redpix>(red+rfl))&&(greenpix<(green-gfl))||(greenpix>(green+gfl))&&(bluepix<(blue-bfl))||(bluepix>(blue+bfl)))
{
check = 2; // target it
}
if (!check)
{
lum = (redpix + greenpix + bluepix) / 3.0;
keylum = (red + blue + green) / 3.0;
lowfuzz = (rf + gf + bf) / 3.0;
if (lowfuzz < 0.0) lowfuzz = 0.0;
highfuzz = (rf + gf + bf) / 3.0;
if (highfuzz > 1.0) highfuzz = 1.0;
lowfloor = keylum - ((rfl + gfl + bfl) / 3.0);
if (lowfloor < 0.0) lowfloor = 0.;
highfloor = keylum + (rfl + gfl + bfl) / 3.0;
if (highfloor > 1.0) highfloor = 1.0;
if (lum < keylum)
{
coeff = ((lum - lowfloor) / (keylum - lowfuzz));
}
if (lum >= keylum)
{
coeff = ((255 - lum - highfloor) / (255 - keylum - highfuzz));
}
rkeyed = ((float)r32(pix2_32[x]) * coeff) + ((float)r32(pix1_32[x]) * (1.0 - coeff));
gkeyed = ((float)g32(pix2_32[x]) * coeff) + ((float)g32(pix1_32[x]) * (1.0 - coeff));
bkeyed = ((float)b32(pix2_32[x]) * coeff) + ((float)b32(pix1_32[x]) * (1.0 - coeff));
pix2_32[x] = rgbtocolor32(rkeyed, gkeyed, bkeyed);
}
if (check==1)
{ // was pix3
// pix2_32[x] = rgbtocolor32(r32(pix2_32[x]), g32(pix2_32[x]), b32(pix2_32[x]));
}
if (check==2)
{ // was pix2
pix2_32[x] = rgbtocolor32(r32(pix1_32[x]), g32(pix1_32[x]), b32(pix1_32[x]));
}
}
}
break;
}
}
|
