draw: implement pipeline statistics in the draw module

This is a basic implementation of the pipeline statistics in the
draw module. The interface is similar to the stream output statistics
and also requires that the callers explicitly enable it.
Included is the implementation of the interface in llvmpipe and
softpipe. Only softpipe enables the pipeline statistics capability
though because llvmpipe is lacking gathering of the fragment shading
and rasterization statistics.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/gallium/drivers/softpipe/sp_quad_fs.c b/src/gallium/drivers/softpipe/sp_quad_fs.c
index f32fe5f4068..d379f6457e3 100644
--- a/src/gallium/drivers/softpipe/sp_quad_fs.c
+++ b/src/gallium/drivers/softpipe/sp_quad_fs.c
@@ -73,6 +73,11 @@ shade_quad(struct quad_stage *qs, struct quad_header *quad)
    struct softpipe_context *softpipe = qs->softpipe;
    struct tgsi_exec_machine *machine = softpipe->fs_machine;
 
+   if (softpipe->active_statistics_queries) {
+      softpipe->pipeline_statistics.ps_invocations +=
+         util_bitcount(quad->inout.mask);         
+   }
+
    /* run shader */
    machine->flatshade_color = softpipe->rasterizer->flatshade ? TRUE : FALSE;
    return softpipe->fs_variant->run( softpipe->fs_variant, machine, quad );