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// 242.rgbseek -- does binary color recognition on an input image.
// by r. luke dubois (luke@music.columbia.edu),
// computer music center, columbia university, 2001.
//
// 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: rgbseek <red> <green> <blue> <fuzzi red> <fuzzi green> <fuzzi blue>
//
// return: 1 if color exists in frame, 0 if not
//
#include <stdio.h>
#include <string.h>
#include "plugin.h"
void perform_effect(struct frame f, struct args a)
{
int x,y;
byte red = 0, green = 0, blue = 0, check = 0, rf = 0, gf = 0, bf = 0;
byte bits = f.pixelformat/8;
byte redpix, greenpix, bluepix; // the color values
pixel16 c16;
pixel24 c24;
pixel32 c32;
char *ret_check; // returns the result
char *t;
// get r g b and fuzzi 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);
printf("rgbseek: %d %d %d\n", red, green, blue);
// get returnvaluereceivenames
if(!(t = strstr(t+1, " "))) return;
ret_check = t+1;
t[0]=0;
for(y = 0; y < f.height; y++)
{
for(x = 0; x < f.width; x++)
{
switch (f.pixelformat)
{
case 16:
c16 = scanline16(f, y)[x];
redpix = r16(c16);
greenpix = g16(c16);
bluepix = b16(c16);
break;
case 24:
c24 = scanline24(f, y)[x];
redpix = r24(c24);
greenpix = g24(c24);
bluepix = b24(c24);
break;
case 32:
c32 = scanline32(f, y)[x];
redpix = r32(c32);
greenpix = g32(c32);
bluepix = b32(c32);
break;
}
if ((redpix>=(red-rf))&&(redpix<=(red+rf))&&(greenpix>=(green-gf))&&(greenpix<=(green+gf))&&(bluepix>=(blue-bf))&&(bluepix<=(blue+bf)))
{
check = 1; // found the color, let's get outta here
goto done;
}
}
}
check = 0; // didn't find the color
done:
// return-values:
//
// framestein will send data given in the form "pd_receiver_name=value"
// back to pd.
sprintf(a.ret, "%s=%d", ret_check, check);
}
void perform_copy(struct frame f1, struct frame f2, struct args a)
{
printf("Using rgbseek as copy operation does nothing!\n");
}
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