diff options
Diffstat (limited to 'Plugins/compare.c')
| -rw-r--r-- | Plugins/compare.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/Plugins/compare.c b/Plugins/compare.c new file mode 100644 index 0000000..a507be9 --- /dev/null +++ b/Plugins/compare.c @@ -0,0 +1,163 @@ +// +// compare - compare two images for differences +// +// if pixels are identical a background color get's displayed, +// returns number of pixels that are identical +// +// written by Olaf Matthes <olaf.matthes@gmx.de> +// inspired by code written by Trond Lossius, Bergen senter for elektronisk kunst (BEK) +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 2 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +// usage: compare <red fuzz> <green fuzz> <blue fuzz> <bg red> <bg green> <bg blue> [<receive name>] +// in case the (optional) receive name is specified, you get back the number of pixels that have been +// found to be identical in both images +// + +#include <stdio.h> +#include <string.h> +#include "plugin.h" + +void perform_effect(struct frame f, struct args a) +{ + printf("Using compare as effect does nothing!\n"); +} + +void perform_copy(struct frame f1, struct frame f2, struct args a) +{ + short x, y, w, h, ret; + long count = 0; + pixel16 *pix1_16, *pix2_16; + pixel24 *pix1_24, *pix2_24; + pixel32 *pix1_32, *pix2_32; + byte redfuzzi, greenfuzzi, bluefuzzi, redbg, greenbg, bluebg, check; + char *t; + char *ret_count; // returns the result (number of identical pixels) + + w = f1.width<f2.width ? f1.width : f2.width; + h = f1.height<f2.height ? f1.height : f2.height; + + // get params + if(!a.s) return; + redfuzzi = klamp255(atoi(a.s)); + if(!(t = strstr(a.s, " "))) return; + greenfuzzi = klamp255(atoi(t+1)); + if(!(t = strstr(t+1, " "))) return; + bluefuzzi = klamp255(atoi(t+1)); + if(!(t = strstr(t+1, " "))) return; + redbg = klamp255(atoi(t+1)); + if(!(t = strstr(t+1, " "))) return; + greenbg = klamp255(atoi(t+1)); + if(!(t = strstr(t+1, " "))) return; + bluebg = klamp255(atoi(t+1)); + + printf("compare: rf%d gf%d bf%d - rbg%d gbg%d bbg%d\n", + redfuzzi, greenfuzzi, bluefuzzi, redbg, greenbg, bluebg); + + // get returnvaluereceivenames + if(!(t = strstr(t+1, " "))) + { + ret = 0; // don't return anything + } + else + { + ret = 1; // return number of identical pixels + ret_count = t+1; + t[0]=0; + } + + switch(f1.pixelformat) + { + case 16: + // compare images pixel by pixel + for(y = 0; y < h; y++) + { + pix1_16 = scanline16(f1, y); + pix2_16 = scanline16(f2, y); + for(x = 0; x < w; x++) + { + check = 1; + + if(abs(r16(pix1_16[x]) - r16(pix2_16[x])) > redfuzzi) + check = 0; + else if(abs(g16(pix1_16[x]) - g16(pix2_16[x])) > greenfuzzi) + check = 0; + else if(abs(b16(pix1_16[x]) - b16(pix2_16[x])) > bluefuzzi) + check = 0; + + if(check) + { + pix2_16[x] = rgbtocolor16(redbg, greenbg, bluebg); + count++; + } + } + } + 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 = 1; + + if(abs(r24(pix1_24[x]) - r24(pix2_24[x])) > redfuzzi) + check = 0; + else if(abs(g24(pix1_24[x]) - g24(pix2_24[x])) > greenfuzzi) + check = 0; + else if(abs(b24(pix1_24[x]) - b24(pix2_24[x])) > bluefuzzi) + check = 0; + + if(check) + { + pix1_24[x] = rgbtocolor24(redbg, greenbg, bluebg); + count++; + } + } + } + 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 = 1; + + if(abs(r32(pix1_32[x]) - r32(pix2_32[x])) > redfuzzi) + check = 0; + else if(abs(g32(pix1_32[x]) - g32(pix2_32[x])) > greenfuzzi) + check = 0; + else if(abs(b32(pix1_32[x]) - b32(pix2_32[x])) > bluefuzzi) + check = 0; + + if(check) + { + pix2_32[x] = rgbtocolor32(redbg, greenbg, bluebg); + count++; + } + } + } + break; + } + // return-value: + // + // framestein will send data given in the form "pd_receiver_name=value" + // back to pd. + + if(ret)sprintf(a.ret, "%s=%d", ret_count, count); +} |