fontcomp.c

   1 // Copyright (C) 2021 Harry Godden (hgn) - All Rights Reserved
   2
   3 #define VG_TOOLS
   4 #include "vg/vg.h"
   5
   6 // Super basic model compiler
   7 int main( int argc, char *argv[] )
   8 {
   9         if( argc < 3 )
  10         {
  11                 vg_error( "Need input/output files\n" );
  12                 return 0;
  13         }
  14
  15         FILE *output;
  16
  17         int x,y,n;
  18         unsigned char *data = stbi_load( argv[1], &x, &y, &n, 4 );
  19
  20         if( data )
  21         {
  22                 output = fopen( argv[2], "w" );
  23                 if( !output )
  24                 {
  25                         vg_error( "couldn't open output for writing\n" );
  26                         free(data);
  27                         return 0;
  28                 }
  29
  30                 fprintf( output, "/* Font buffer generated from source file: '%s' */\n", argv[1] );
  31
  32                 u32 pixel_max = x*y;
  33                 u32 pixel = 0, chars = 0;
  34                 while(pixel_max)
  35                 {
  36                         u32 buff = 0;
  37                         for( int b = 31; b >= 0; b-- )
  38                         {
  39                                 buff |= data[pixel*4+3]>128?0x1<<b:0;
  40                                 pixel++;
  41
  42                                 if( pixel >= pixel_max )
  43                                 {
  44                                         pixel_max = 0;
  45                                         break;
  46                                 }
  47                         }
  48
  49                         fprintf( output, "%#x,", buff );
  50                         if( (++chars) % 8 == 0 )
  51                                 fprintf( output, "\n" );
  52                 }
  53
  54                 free(data);
  55                 fclose(output);
  56         }
  57         else
  58         {
  59                 vg_error( "Couldn't open source file\n" );
  60                 return 0;
  61         }
  62 }