I have all printable ASCII characters in this picture, excluding empty space:
I converted it to raw binary:
convert font2.png -size 1128x16 -depth 8 RGBA:font.datThen I wrote some code to load and display that font:
static uint8_t **pixels = NULL;static const uint16_t font_w = 1128;static const uint16_t font_h = 16;static const uint16_t char_w = 12;static int read_pixels( void ){ FILE *fp; int c; size_t ch_size; fp = fopen( "data/font.dat", "r" ); if ( !fp ) return 0; pixels = malloc( sizeof(uint8_t*) * 95 ); ch_size = font_h * char_w * 4; for( c=0; c<95; c++ ) { pixels[c] = malloc( ch_size ); fseek( fp, SEEK_SET, c*ch_size ); fread( pixels[c], ch_size, 1, fp ); } fclose( fp ); return 1;}int load_font( void ){ printf( "Loading font...\n" ); if ( !read_pixels() ) return 0; return 1;}void draw_text( int x, int y, char *str ){ char *c; int index; for( c=str; *c; c++ ) { if ( *c == ' ' ) { x++; continue; } if ( !isprint(*c) ) index = 32; else index = (*c) - 32; if ( index < 0 || index > 127 ) index = 32; glWindowPos2i( x++ * char_w, y ); glDrawPixels( char_w, font_h, GL_RGBA, GL_UNSIGNED_BYTE, pixels[index] ); }}There are 2 problems with draw_text(). It draws the text at wrong coordinates, and the text looks like this:
Above should read "Hello world!" (the space shows as green background color because it is not drawn).
Do you see the problem in my code?
[Edited by - usbman3 on December 12, 2010 10:06:10 AM]
