diff options
Diffstat (limited to 'Plugins/constrain.c')
| -rw-r--r-- | Plugins/constrain.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/Plugins/constrain.c b/Plugins/constrain.c new file mode 100644 index 0000000..86d0909 --- /dev/null +++ b/Plugins/constrain.c @@ -0,0 +1,106 @@ +// 242.constrain -- does color range constraining 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: constrain <min red> <min green> <min blue> <max red> <max green> <max blue> +// + +#include <stdio.h> +#include <string.h> +#include "plugin.h" + +void perform_effect(struct frame f, struct args a) +{ + int x,y; + byte redmin, greenmin, bluemin, redmax, greenmax, bluemax; + byte redpix, greenpix, bluepix; // the color values + pixel16 *c16; + pixel24 *c24; + pixel32 *c32; + char *t; + + // get params + if(!a.s) return; + redmin = atoi(a.s); + if(!(t = strstr(a.s, " "))) return; + greenmin = atoi(t+1); + if(!(t = strstr(t+1, " "))) return; + bluemin = atoi(t+1); + if(!(t = strstr(t+1, " "))) return; + redmax = atoi(t+1); + if(!(t = strstr(t+1, " "))) return; + greenmax = atoi(t+1); + if(!(t = strstr(t+1, " "))) return; + bluemax = atoi(t+1); + + printf("constrain: rmin%d gmin%d bmin%d - rmax%d gmax%d - bmax%d\n", + redmin, greenmin, bluemin, redmax, greenmax, bluemax); + + + for(y = 0; y < f.height; y++) + { + for(x = 0; x < f.width; x++) + { + switch(f.pixelformat) + { + case 16: + *c16 = scanline16(f, y); + redpix = r16(c16[x]); + greenpix = g16(c16[x]); + bluepix = b16(c16[x]); + + if(redpix < redmin) redpix = redmin; + if(redpix > redmax) redpix = redmax; + if(greenpix < greenmin) greenpix = greenmin; + if(greenpix > greenmax) greenpix = greenmax; + if(bluepix < bluemin) bluepix = bluemin; + if(bluepix > bluemax) bluepix = bluemax; + + // set the output pixel + c16[x] = rgbtocolor16(redpix, greenpix, bluepix); + break; + case 24: + c24 = scanline24(f, y); + redpix = r24(c24[x]); + greenpix = g24(c24[x]); + bluepix = b24(c24[x]); + + if(redpix < redmin) redpix = redmin; + if(redpix > redmax) redpix = redmax; + if(greenpix < greenmin) greenpix = greenmin; + if(greenpix > greenmax) greenpix = greenmax; + if(bluepix < bluemin) bluepix = bluemin; + if(bluepix > bluemax) bluepix = bluemax; + + // set the output pixel + c24[x] = rgbtocolor24(redpix, greenpix, bluepix); + break; + case 32: + c32 = scanline32(f, y); + redpix = r32(c32[x]); + greenpix = g32(c32[x]); + bluepix = b32(c32[x]); + + if(redpix < redmin) redpix = redmin; + if(redpix > redmax) redpix = redmax; + if(greenpix < greenmin) greenpix = greenmin; + if(greenpix > greenmax) greenpix = greenmax; + if(bluepix < bluemin) bluepix = bluemin; + if(bluepix > bluemax) bluepix = bluemax; + + // set the output pixel + c32[x] = rgbtocolor32(redpix, greenpix, bluepix); + break; + } + } + } +} + +void perform_copy(struct frame f1, struct frame f2, struct args a) +{ + printf("Using constrain as copy operation does nothing!\n"); +} |