diff options
author | Juha Vehviläinen <jusu@users.sourceforge.net> | 2002-07-09 12:36:46 +0000 |
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committer | Juha Vehviläinen <jusu@users.sourceforge.net> | 2002-07-09 12:36:46 +0000 |
commit | f8d8ce4d35bfbba5391af2a3fbce2ad88f94dd69 (patch) | |
tree | 8306320e4e2c602d8c64590bb5eeed180d249a2b /Plugins/modgain.c | |
parent | 311e440f30c218015d17fb390f50829f430d5128 (diff) |
PeRColate
svn path=/trunk/Framestein/; revision=31
Diffstat (limited to 'Plugins/modgain.c')
-rw-r--r-- | Plugins/modgain.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/Plugins/modgain.c b/Plugins/modgain.c new file mode 100644 index 0000000..1c4ce56 --- /dev/null +++ b/Plugins/modgain.c @@ -0,0 +1,89 @@ +// 242.modgain -- does modulo channel shifting 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: modgain <red> <green> <blue> +// + +#include <stdio.h> +#include <string.h> +#include <math.h> +#include "plugin.h" + +void perform_effect(struct frame f, struct args arg) +{ + int x,y; + int red, green, blue, alpha; // parameters + byte r, g, b, a; + byte bits = f.pixelformat/8; + byte redpix, greenpix, bluepix; // the color values + pixel16 *c16; + pixel24 *c24; + pixel32 *c32; + char *t; + + // get params + if(!arg.s) return; + red = atoi(arg.s); + if(!(t = strstr(arg.s, " "))) return; + green = atoi(t+1); + if(!(t = strstr(arg.s, " "))) return; + blue = atoi(t+1); + + printf("modgain: r%d g%d b%d\n", red, green, blue); + + for(y = 0; y < f.height; y++) + { + for(x = 0; x < f.width; x++) + { + switch(f.pixelformat) + { + case 16: + c16 = scanline16(f, y); + r = (r16(c16[x]) + red) % 255; + g = (g16(c16[x]) + green) % 255; + b = (b16(c16[x]) + blue) % 255; + // shift the pixels and wrap them + if(r<0) r += 255; + if(g<0) g += 255; + if(b<0) b += 255; + + c16[x] = rgbtocolor16(r, g, b); + break; + case 24: + c24 = scanline24(f, y); + r = (r24(c24[x]) + red) % 255; + g = (g24(c24[x]) + green) % 255; + b = (b24(c24[x]) + blue) % 255; + // shift the pixels and wrap them + if(r<0) r += 255; + if(g<0) g += 255; + if(b<0) b += 255; + + c24[x] = rgbtocolor24(r, g, b); + break; + case 32: + c32 = scanline32(f, y); + r = (r32(c32[x]) + red) % 255; + g = (g32(c32[x]) + green) % 255; + b = (b32(c32[x]) + blue) % 255; + // shift the pixels and wrap them + if(r<0) r += 255; + if(g<0) g += 255; + if(b<0) b += 255; + + c32[x] = rgbtocolor32(r, g, b); + break; + } + } + } +} + +void perform_copy(struct frame f1, struct frame f2, struct args a) +{ + printf("Using modgain as copy operation does nothing!\n"); +} |