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glamor: Only use dual blending with GLSL >= 1.30 

It can't be used with older GLSL. Fixes a crash when attempting to
anyway.

Closes: https://gitlab.freedesktop.org/xorg/xserver/issues/97
Fixes: e7308b6c77 "glamor: Add support for CA rendering in a single pass."
Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Michel Dänzer 2019-12-18 18:18:50 +01:00 committed by Michel Dänzer
parent 846e81ecb8
commit 5bfca0038e
1 changed files with 1 additions and 0 deletions
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glamor/glamor.c
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@ -797,6 +797,7 @@ glamor_init(ScreenPtr screen, unsigned int flags)
epoxy_gl_version() >= 30 ||
epoxy_has_gl_extension("GL_NV_pack_subimage");
glamor_priv->has_dual_blend =
glamor_priv->glsl_version >= 130 &&
epoxy_has_gl_extension("GL_ARB_blend_func_extended");
glamor_priv->has_clear_texture =
epoxy_gl_version() >= 44 ||