Nicolas Winkler 907f8586e4 removed direct opengl dependency 5 lat temu
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include 58d7e06e58 trying out 5 lat temu
lpng1637 20e23c354b re-adding png libtest 5 lat temu
src 907f8586e4 removed direct opengl dependency 5 lat temu
zlib-1.2.11 23ecd61563 adding libpng and zlib 5 lat temu
CMakeLists.txt 2e5727757e using libpng 5 lat temu