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Kenneth Graunke authored
This reintroduces libpng support, but makes it optional since I only plan to use it in an optional feature most people won't use. This code is based on: commit ed98ddeb Author: Nicolai Haehnle <nhaehnle@gmail.com> Date: Sun Mar 25 22:48:07 2007 +0200 texline: Write screenshot using libpng Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
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