My current project is trying to write a simple font character set
browser using Gtk. I want to render the glyphs from the font to a
GtkLayout (so it can scroll).
It seems the easy (and probably naive and slow) way to render fonts is
like this (in the expose event):
layout = gtk_widget_create_pango_layout(widget, text);
When I try this with my sample file (sample.u8, displayed in the above
screenshot), my text displays correctly, but I get this warning:
fb (pid:17955): ** WARNING **: pango_default_break(): the array
of PangoLogAttr passed in must have at least N+1 elements, if
there are N characters in the text being broken
Here's a backtrace (using --g-fatal-warnings):
#2 0x4044401e in pango_default_break () from /usr/lib/libpango-0.23.so
#3 0x404456b6 in pango_break () from /usr/lib/libpango-0.23.so
#4 0x404506ab in pango_layout_get_pixel_size () from /usr/lib/libpango-0.23.so
#5 0x404509c9 in pango_layout_get_pixel_size () from /usr/lib/libpango-0.23.so
#6 0x40451fa3 in pango_layout_get_iter () from /usr/lib/libpango-0.23.so
#7 0x4024400b in gdk_draw_layout_with_colors () from /usr/lib/libgdk-x11-1.3.so.12
#8 0x402442a0 in gdk_draw_layout () from /usr/lib/libgdk-x11-1.3.so.12
#9 0x080491e0 in expose_event ()
Am I going about this the wrong way?
It sounds reasonable. I think there I may have heard about some problems with one-character
layouts, though I can't reproduce that in some quick tests. If you can produce a test
case that exhibits the problem, I'll take a look.