commit (HEAD): more smart shaping stuff

From: Tomas Frydrych (tomasfrydrych_at_yahoo.co.uk)
Date: Tue Nov 25 2003 - 04:40:22 EST

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disabled latin ligatures for now (I am planing to add a preference
for this that will default to 'off')

Some tweaking of how we handle the return values from
UT_contextGlyph::renderString()

Added UT_contextGlyph::copyString(), which coresponds to
renderString() but does not attempt to shape or ligate, only deals
with mirror characters and remaps absent glyphs. It is used when we
know that no context sensitive or ligating characters are present in
our text.

files: ut_contextGlyph.h/cpp, fp_TextRun.cpp, fp_Run.cpp,
fl_BlockLayout.cpp

Tomas

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