From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 21 Apr 2021 14:06:18 +0000 (+0300)
Subject: Use a generation number to track if ProgramData has changed
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=bb386d895f5fce2f0099886fdf7e7073b18246e8;hp=bb386d895f5fce2f0099886fdf7e7073b18246e8;p=libs%2Fgl.git

Use a generation number to track if ProgramData has changed

This avoids the need for an application to call flush_shader_data after
a change to uniform values in some cases.
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