I've been seeing strange effects in the font rendering when zooming in
dramatically. Inter-character and inter-word spacing was becoming
radically large or radically close to zero, (with overlapping
characters, etc.).
I assume the problem has something to do with numbers outside the
representable range of Pango's fixed-width implementation, (see "pango
units"). Simply setting an identity matrix before creating the layout
and selecting the font clears up all problems that I have seen so far.
if (text == NULL)
text = "";
+ cairo_save (acre->cr);
+ cairo_identity_matrix (acre->cr);
+
layout = pango_cairo_create_layout (acre->cr);
pango_layout_set_font_description (layout, acre->font);
pango_layout_set_text (layout, text, -1);
pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
+ cairo_restore (acre->cr);
+
return layout;
}