src/fontcomp.c

   1 // Copyright (C) 2021 Harry Godden (hgn) - All Rights Reserved
   2
   3 #define VG_TOOLS
   4 #include "vg/vg.h"
   5
   6 #define STB_IMAGE_IMPLEMENTATION
   7 #include "stb/stb_image.h"
   8
   9 // Super basic model compiler
  10 int main( int argc, char *argv[] )
  11 {
  12         if( argc < 3 )
  13         {
  14                 vg_error( "Need input/output files\n" );
  15                 return 0;
  16         }
  17
  18         FILE *output;
  19
  20         int x,y,n;
  21         unsigned char *data = stbi_load( argv[1], &x, &y, &n, 4 );
  22
  23         if( data )
  24         {
  25                 output = fopen( argv[2], "w" );
  26                 if( !output )
  27                 {
  28                         vg_error( "couldn't open output for writing\n" );
  29                         free(data);
  30                         return 0;
  31                 }
  32
  33                 fprintf( output, "/* Font buffer generated from source file: '%s' */\n", argv[1] );
  34
  35                 u32 pixel_max = x*y;
  36                 u32 pixel = 0, chars = 0;
  37                 while(pixel_max)
  38                 {
  39                         u32 buff = 0;
  40                         for( int b = 31; b >= 0; b-- )
  41                         {
  42                                 buff |= data[pixel*4]>128?0x1<<b:0;
  43                                 pixel++;
  44
  45                                 if( pixel >= pixel_max )
  46                                 {
  47                                         pixel_max = 0;
  48                                         break;
  49                                 }
  50                         }
  51
  52                         fprintf( output, "%#x,", buff );
  53                         if( (++chars) % 8 == 0 )
  54                                 fprintf( output, "\n" );
  55                 }
  56
  57                 free(data);
  58                 fclose(output);
  59
  60       vg_success( "Font compiled successfully\n" );
  61         }
  62         else
  63         {
  64                 vg_error( "Couldn't open source file\n" );
  65                 return 0;
  66         }
  67 }