Question

I use cairo to render a simple text onto a cairo surface. I use a freetype font for that (Vera.ttf if that matters). It works, but sometimes characters disappear from the output. In fact only the numbers. I drew a text ‘Demostream 1..’ and sometimes the ‘1’ disappears from the output and I have absolutely no idea why. The number is defitivly part of the string. There’s also no memory corrpution or anything like that. This is the code that draws the text:

font = cairo_ft_font_face_create_for_ft_face(ftFace, 0);
cr = cairo_create(surface);

/* set the foreground color */
cairo_set_source_rgba(cr, ...);

/* render the text */
cairo_set_antialias(cr, CAIRO_ANTIALIAS_GRAY);
cairo_set_font_face(cr, font);
cairo_set_font_size(cr, size);
cairo_move_to(cr, x, y);

cairo_show_text(cr, text);

cairo_destroy(cr);
cairo_font_face_destroy(font);

ftFace is a loaded freetype font face.

I also would use pango to render the text, but I don’t have fontcache available – so I have no idea howto load the Font into pango since it obviously only supports fontcache and no direct font loading.

Any input is welcome..

Answer 1

i removed cairo support – the problem is not longer relevant.