sys/src/libmemdraw/mkcmap.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <draw.h>
   4 #include <memdraw.h>
   5
   6 /*
   7 struct Memcmap
   8 {
   9         uchar   cmap2rgb[3*256];
  10         uchar   rgb2cmap[16*16*16];
  11 };
  12 */
  13
  14 static Memcmap*
  15 mkcmap(void)
  16 {
  17         static Memcmap def;
  18
  19         int i, rgb, r, g, b;
  20
  21         for(i=0; i<256; i++){
  22                 rgb = cmap2rgb(i);
  23                 r = (rgb>>16)&0xff;
  24                 g = (rgb>>8)&0xff;
  25                 b = rgb&0xff;
  26                 def.cmap2rgb[3*i] = r;
  27                 def.cmap2rgb[3*i+1] = g;
  28                 def.cmap2rgb[3*i+2] = b;
  29         }
  30
  31         for(r=0; r<16; r++)
  32         for(g=0; g<16; g++)
  33         for(b=0; b<16; b++)
  34                 def.rgb2cmap[r*16*16+g*16+b] = rgb2cmap(r*0x11, g*0x11, b*0x11);
  35         return &def;
  36 }
  37
  38 void
  39 main(int argc, char **argv)
  40 {
  41         Memcmap *c;
  42         int i, j, inferno;
  43
  44         inferno = 0;
  45         ARGBEGIN{
  46         case 'i':
  47                 inferno = 1;
  48         }ARGEND
  49
  50         memimageinit();
  51         c = mkcmap();
  52         if(!inferno)
  53                 print("#include <u.h>\n#include <libc.h>\n");
  54         else
  55                 print("#include \"lib9.h\"\n");
  56         print("#include <draw.h>\n");
  57         print("#include <memdraw.h>\n\n");
  58         print("static Memcmap def = {\n");
  59         print("/* cmap2rgb */ {\n");
  60         for(i=0; i<sizeof(c->cmap2rgb); ){
  61                 print("\t");
  62                 for(j=0; j<16; j++, i++)
  63                         print("0x%2.2ux,", c->cmap2rgb[i]);
  64                 print("\n");
  65         }
  66         print("},\n");
  67         print("/* rgb2cmap */ {\n");
  68         for(i=0; i<sizeof(c->rgb2cmap);){
  69                 print("\t");
  70                 for(j=0; j<16; j++, i++)
  71                         print("0x%2.2ux,", c->rgb2cmap[i]);
  72                 print("\n");
  73         }
  74         print("}\n");
  75         print("};\n");
  76         print("Memcmap *memdefcmap = &def;\n");
  77         print("void _memmkcmap(void){}\n");
  78         exits(0);
  79 }