I'm trying to get a bitmap rendered by Pango with a given character, in this case the letter "T". I thought this should work, but it just prints out garbage..
In this code, gtk_window
is already initialized as a GTK window.
int width, height;
PangoLayout *layout = gtk_widget_create_pango_layout(gtk_window, "T");
PangoFontDescription *fontdesc = pango_font_description_from_string("Terminus 12");
pango_layout_set_font_description (layout, fontdesc);
pango_layout_get_pixel_size (layout, &width, &height);
GdkPixmap *temp_pixmap = gdk_pixmap_new(NULL, width, height, 24) ;
GdkGC *gc = gdk_gc_new(temp_pixmap);
gdk_draw_layout( temp_pixmap, gc, 0, 0, layout) ;
GdkColormap *cmap = gdk_colormap_get_system() ;
GdkPixbuf *temp_pixbuf = gdk_pixbuf_get_from_drawable(NULL, temp_pixmap,
cmap, 0, 0, 0, 0, width, height);
int n_channels = gdk_pixbuf_get_n_channels (temp_pixbuf);
int rowstride = gdk_pixbuf_get_rowstride(temp_pixbuf);
guchar *pixels = gdk_pixbuf_get_pixels(temp_pixbuf);
int i,j;
for (j=0; j<height; j++) {
for (i=0; i<(width*n_channels); i++) {
printf("%02x ",
*(pixels + i + j*rowstride));
}
printf("\n");
}
The output is different every time, but an example:
dd 24 f8 dd 24 f8 8f 28 28 8f 28 28 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ef 14 ce 00 00 00 d0 00 20 00 00 00 ef 02 02 d0 00 01 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 fc 00 00 00 00 00 ef 02 02 00 03 40 00 00 b9 00 00 c8
00 00 01 00 00 07 00 00 07 00 00 00 00 00 02 00 00 00 00 00 d0 00 00 c8
00 00 01 00 00 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 04 00 00 00
00 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 0e 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 12 ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 7a 4e 00 00 00 01 00 00 00 00 00 00 00 00 00 01 ff ff ff ff ff ff
ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Which looks nothing like the letter "T"!
Any idea what I'm doing wrong? Thanks!