vc4: Actually add support for polygon offset.

Setting the bit without setting the offset values is kind of useless.
Fixes piglit polygon-offset (but not polygon-mode-offset).

1 files changed, 11 insertions, 1 deletions

diff --git a/src/gallium/drivers/vc4/vc4_state.c b/src/gallium/drivers/vc4/vc4_state.c
index 2e14573deb0..81dac21f548 100644
--- a/src/gallium/drivers/vc4/vc4_state.c
+++ b/src/gallium/drivers/vc4/vc4_state.c
@@ -79,6 +79,12 @@ vc4_set_sample_mask(struct pipe_context *pctx, unsigned sample_mask)
         vc4->dirty |= VC4_DIRTY_SAMPLE_MASK;
 }
 
+static uint16_t
+float_to_187_half(float f)
+{
+        return fui(f) >> 16;
+}
+
 static void *
 vc4_create_rasterizer_state(struct pipe_context *pctx,
                             const struct pipe_rasterizer_state *cso)
@@ -102,9 +108,13 @@ vc4_create_rasterizer_state(struct pipe_context *pctx,
         if (cso->front_ccw)
                 so->config_bits[0] |= VC4_CONFIG_BITS_CW_PRIMITIVES;
 
-        if (cso->offset_tri)
+        if (cso->offset_tri) {
                 so->config_bits[0] |= VC4_CONFIG_BITS_ENABLE_DEPTH_OFFSET;
 
+                so->offset_units = float_to_187_half(cso->offset_units);
+                so->offset_factor = float_to_187_half(cso->offset_scale);
+        }
+
         return so;
 }