svga: add some comments about primitive conversion

[mesa.git] / src / gallium / drivers / svga / svga_draw_arrays.c

diff --git a/src/gallium/drivers/svga/svga_draw_arrays.c b/src/gallium/drivers/svga/svga_draw_arrays.c
index a506371c5993deaab09de3bc5521b942df78f6c1..7adefd0c38cb83ca8a17e405ed8b29636decdb70 100644 (file)
--- a/src/gallium/drivers/svga/svga_draw_arrays.c
+++ b/src/gallium/drivers/svga/svga_draw_arrays.c
@@ -225,6 +225,7 @@ svga_hwtnl_draw_arrays( struct svga_hwtnl *hwtnl,
    if (hwtnl->api_fillmode != PIPE_POLYGON_MODE_FILL &&
        prim >= PIPE_PRIM_TRIANGLES)
    {
+      /* Convert unfilled polygons into points, lines, triangles */
       gen_type = u_unfilled_generator( prim,
                                        start,
                                        count,
@@ -235,6 +236,10 @@ svga_hwtnl_draw_arrays( struct svga_hwtnl *hwtnl,
                                        &gen_func );
    }
    else {
+      /* Convert PIPE_PRIM_LINE_LOOP to PIPE_PRIM_LINESTRIP,
+       * convert PIPE_PRIM_POLYGON to PIPE_PRIM_TRIANGLE_FAN,
+       * etc, if needed (as determined by svga_hw_prims mask).
+       */
       gen_type = u_index_generator( svga_hw_prims,
                                     prim,
                                     start,