process_item and shaping
- From: Daniel Glassey <danglassey ntlworld com>
- To: GTK i18n <gtk-i18n-list gnome org>
- Subject: process_item and shaping
- Date: Thu, 26 Aug 2004 13:28:54 +0100
I can see from bug #62014 that pango was changed to shape each character
at most twice in pango-layout.c:process_item/insert_run/shape_run. I'm
trying to work out why the second one still needs to be done and why
pango_glyph_item_split isn't used.
Is there a particular reason why shaping will be different for a run on
its own as opposed to the original shaping as part of the original line?
There is a line that says:
/* Shaped items should never be broken */
so I'm guessing there may be a good reason but the assert is strange
because shape_set is always false.
I'm looking at this because shaping is particularly expensive with
graphite, though even the basic shaper is a big hit. If there isn't a
reason to not do it I'll investigate using pango_glyph_item_split and
submit a bug etc later.
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