create_color_table.c

   1 /*
   2  * unable to use gimp?
   3  * me too!
   4  *
   5  */
   6
   7 #include <stdio.h>
   8 #include "bmp.h"
   9
  10 int main(int argc,char **argv) {
  11
  12         t_bmp bmp;
  13         int i,j;
  14         char val;
  15         int off;
  16
  17         bmp_init(&bmp,2);
  18
  19         bmp.width=40;
  20         bmp.height=120;
  21         bmp.mode=WRITE;
  22         if(argv[1][0]=='c') strcpy(bmp.file,"c-col.bmp");
  23         else strcpy(bmp.file,"p-col.bmp");
  24
  25         bmp_alloc_map(&bmp);
  26
  27         for(i=0;i<bmp.height;i++) {
  28                 if(argv[1][0]=='c') {
  29                         for(j=0;j<bmp.width;j++) {
  30                                 off=i*bmp.width+j;
  31                                 val=i*255/bmp.height;
  32                                 bmp.map[off].r=val;
  33                                 bmp.map[off].g=val;
  34                                 bmp.map[off].b=0xff;
  35                         }
  36                 } else {
  37                         for(j=0;j<bmp.width;j++) {
  38                                 off=i*bmp.width+j;
  39                                 if(i<bmp.height/2) {
  40                                         val=i*255/(bmp.height/2);
  41                                         bmp.map[off].b=val;
  42                                         bmp.map[off].g=0;
  43                                         bmp.map[off].g=0;
  44                                 } else {
  45                                         val=(i-bmp.height/2)*255/(bmp.height/2);
  46                                         bmp.map[off].b=0xff;
  47                                         bmp.map[off].g=val;
  48                                         bmp.map[off].b=0;
  49                                 }
  50                         }
  51
  52                 }
  53         }
  54
  55         bmp_write_file(&bmp);
  56
  57         bmp_shutdown(&bmp);
  58
  59         return 1;
  60 }