Eric, thanks for the insight. It's still possible that this is a bug in mesa/etnaviv or a rare glitch in my setup. I'll report back when we know for sure.
Cheers Lukas Eric Anholt <e...@anholt.net> writes: > "Lukas F. Hartmann" <lu...@mntmn.com> writes: > >> Hi, >> >> I upgraded Xwayland and the assorted libraries from git masters today, >> and noticed that glamor wouldn't work anymore on i.MX6/etnaviv. The >> error was: >> >> No provider of glVertexAttribDivisor found. Requires one of: >> Desktop OpenGL 3.3 >> OpenGL ES 3.0 >> GL extension "GL_ANGLE_instanced_arrays" >> GL extension "GL_ARB_instanced_arrays" >> GL extension "GL_EXT_instanced_arrays" >> GL extension "GL_NV_instanced_arrays" >> >> The problem is that etnaviv offers GLSL 140 on GL 2.1 and glamor >> rendering assumes that glVertexAttribDivisor() is always available on >> GLSL>=130, which is not the case here. Forcing GLSL 120 makes glamor >> work fine again on this platform. After chatting with ajax in >> #xorg-devel, the following solution was proposed. > > In Mesa we've decided in the past to not expose GLSL >= 1.30 on GL 2.x, > because you can't use most of the new functionality of GLSL 1.30 without > GL 3.x's APIs. > > However, it would be awfully nice for glamor if Mesa drivers *could* > expose 1.30 on GL2 (if you've got integer textures, you could do > glamor_font.c's accelerated core text rendering, for example), so I'm > tempted to take the patch for now so we can start working toward that. > > Reviewed-by: Eric Anholt <e...@anholt.net> > > but I'll give others a chance to offer input on this. _______________________________________________ xorg-devel@lists.x.org: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: https://lists.x.org/mailman/listinfo/xorg-devel