[Mesa-dev] [PATCH] i965/gen6: Fix GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED_ARB

[Ben Widawsky]

On Fri, Feb 20, 2015 at 08:21:25AM +0100, Iago Toral Quiroga wrote:
> In gen6 we need to compute the primitive count in the generated GS program.
> The current implementation only counts full primitives, that is, if the
> output primitive type is a triangle strip, it won't count individual
> triangles in the strip, only complete strips.
> 
> If we want to count basic primitives instead we have two options: rework
> the assembly code we generate for strip primitives or simply use
> CL_INVOCATION_COUNT to resolve the query and let the hardware do that work
> for us. This patch implements the latter approach.
> 
> Fixes the following piglit test:
> bin/arb_pipeline_statistics_query-geom -auto
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89210
> Tested-by: Mark Janes <mark.a.janes at intel.com>

Reviewed-by: Ben Widawsky <ben at bwidawsk.net>