llvmpipe: do final the pixel in/out triangle test in the fragment shader

The test to determine which of the pixels in a 2x2 quad is now done in
the fragment shader rather than in the calling C code.  This is a little
faster but there's a few more things to do.

Note that the step[] array elements are in a different order now.  Rather
than being in row-major order for the 4x4 grid, they're in "quad-major"
order.  The setup of the step arrays is a little more complicated now.
So is the course/intermediate tile test code, but some lookup tables
help with that.

Next steps:
 - early-cull 2x2 quads which are totally outside the triangle.
 - skip the in/out test for fully contained quads
 - make the in/out comparison code tighter/faster.

1 files changed, 1 insertions, 10 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_rast_priv.h b/src/gallium/drivers/llvmpipe/lp_rast_priv.h
index 79a90f6610c..cd72d7e69d8 100644
--- a/src/gallium/drivers/llvmpipe/lp_rast_priv.h
+++ b/src/gallium/drivers/llvmpipe/lp_rast_priv.h
@@ -61,15 +61,6 @@ struct lp_rasterizer_task
 
    unsigned x, y;          /**< Pos of this tile in framebuffer, in pixels */
 
-   /* Pixel blocks produced during rasterization
-    */
-   unsigned nr_blocks;
-   struct {
-      unsigned x;
-      unsigned y;
-      unsigned mask;
-   } blocks[256];
-
    const struct lp_rast_state *current_state;
 
    /** "back" pointer */
@@ -133,6 +124,6 @@ void lp_rast_shade_quads( struct lp_rasterizer *rast,
                           unsigned thread_index,
                           const struct lp_rast_shader_inputs *inputs,
                           unsigned x, unsigned y,
-                          unsigned masks);
+                          int32_t c1, int32_t c2, int32_t c3);
 
 #endif