36928 Fermer 36930
robinHoodLe 18/11/2019 à 23:54

#include <stdio.h>
#include <ft2build.h>
#include FT_FREETYPE_H

#include "unicode/utf8.h"

#define FONT_WIDTH 12
#define FONT_HEIGHT 12

#define u32 unsigned int
#define u8 unsigned char

void printChar( FT_Bitmap * b ){
  u32 sx = b->width, sy = b->rows ;
  u8 *p = b->buffer, *pend = p + sx*sy, *lend = p ;

  while( p != pend ){
    lend += sx;
    while( p != lend ){
      printf("%c",*p ? *p > 127 ? '*' : 'o' : ' ');
      p++;
    };
    printf("\n");
  };
}

UChar32 * read_utf8( const char * s ){
  const char * p = s;
  while( *p++ );
  p--;
  u32 l = p - s;
  UChar32 * s32 = (UChar32*)malloc( (l + 2) * sizeof(UChar32) );
  UChar32 * p32 = &s32[1];
  unsigned int i = 0;
  UChar32 c;
  while( 1 ){
    //printf("%u/%u\n",i,l);
    U8_NEXT( s, i, l, c );
    //printf("%08x\n",c);
    if( !c || i > l ) break;
    *p32++ = c;
  };
  *p32++ = 0;
  l = p32 - s32;
  *s32 = l - 2;
  /*for( u32 n=0; n< l; n++ )
    printf("%02u 0x%08x\n",n,s32[n]);
  printf("realloc to %u\n",l * sizeof(UChar32)); */
  p32 = (UChar32*)realloc( s32, l * sizeof(UChar32) );
  if( p32 ) s32 = p32;
  return s32;
}

int main( int argc, char**  argv ){
  FT_Library library;
  FT_Face face;
  FT_Error error;

  if ( argc != 3 ){
    fprintf ( stderr, "usage: %s *font* *text*\n", argv[0] );
    exit( 1 );
  }

  error = FT_Init_FreeType( &library );
  error = FT_New_Face( library, argv[1], 0, &face );
  FT_Set_Pixel_Sizes( face, FONT_WIDTH, FONT_HEIGHT );
  FT_Select_Charmap(face , FT_ENCODING_UNICODE);

  UChar32 * s = read_utf8( argv[2] );
  printf("strlen %u\n",*s);
  UChar32 * ps = s + 1;
  FT_Bitmap * b = &face->glyph->bitmap;
  while( *ps ){
    FT_UInt glyph = FT_Get_Char_Index( face, *ps );
    error = FT_Load_Glyph( face, glyph, FT_LOAD_RENDER );
    printf("\n0x%08x >> %ux%u\n",*ps, b->width, b->rows );
    printChar( b );
    ps++;
  };

  FT_Done_Face( face );
  FT_Done_FreeType( library );

  free( s );

  return 0;
}