[HarfBuzz] Simplifying the hb-shape.cc example

[Nicolas Rougier]

Hi,

I've been trying to simplify the hb-shape.c example from the util directory in order to remove any glib dependencies and come up with source below ( ~50 lines) but it does not seem to work (no ligature for fi):

$ hb-shape DejaVuSans.ttf "fi"
<fi=0+1290>

$ main DejaVuSans.ttf "fi"
<f=0+721|i=2+569>


Did I do something wrong ?


Nicolas


main.cc
======

#include <stdio.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#include "hb-ft.h"

int main( int argc, char **argv )
{
    const char *text = "fi";
    char glyph_name[30];
    size_t i;

    FT_Library library;
    FT_Face face;
    FT_Init_FreeType( &library );
    FT_New_Face( library, "./DejaVuSans.ttf", 0, &face );
    FT_Set_Char_Size( face, (int)(32*64), 0, 72, 72 );

    hb_font_t * font = hb_ft_font_create( face, 0 );
    hb_ft_font_set_funcs( font );

    hb_buffer_t * buffer = hb_buffer_create( );
    hb_buffer_set_direction( buffer, HB_DIRECTION_LTR );
    hb_buffer_add_utf8( buffer, text, strlen(text), 0, strlen(text) );
    hb_shape( font, buffer, NULL, 0 );
    unsigned int num_glyphs = hb_buffer_get_length (buffer);
    hb_glyph_info_t* glyphs = hb_buffer_get_glyph_infos( buffer, 0 );
    hb_glyph_position_t *pos = hb_buffer_get_glyph_positions( buffer, 0 );
    hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL);

    for( i=0; i<num_glyphs; ++i )
    {
        if( i ) printf( "|" );
        else    printf( "<" );
        if (!FT_Get_Glyph_Name( face, glyphs[i].codepoint, glyph_name, sizeof (glyph_name) ))
            printf( "%s", glyph_name );
        else
            printf( "%u", info->codepoint );
        printf( "=%u", info->cluster );
        if (pos->x_offset || pos->y_offset) {
            printf("@");
            if (pos->x_offset) printf ("%d", pos->x_offset);
            if (pos->y_offset) printf (",%d", pos->y_offset);
        }
        if (pos->x_advance || pos->y_advance) {
            printf ("+");
            if (pos->x_advance) printf ("%d", pos->x_advance);
            if (pos->y_advance) printf (",%d", pos->y_advance);
        }
        ++pos; ++info;
    }
    printf( ">\n" );

    hb_font_destroy(font);
    FT_Done_Face( face );
    FT_Done_FreeType( library );
}