From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 18 Nov 2016 17:40:16 +0000 (+0200)
Subject: Automatically backport shaders to earlier GLSL versions if necessary
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=74bd3813b9744550c9ac5980588e561835b616d9;hp=74bd3813b9744550c9ac5980588e561835b616d9;p=libs%2Fgl.git

Automatically backport shaders to earlier GLSL versions if necessary

Fragment shader output replacement is a bit crude and will just replace
any output with gl_FragColor.  It will be made better later.
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