Mesa (master): panfrost: Wire up GLES2-class polygon offset

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Module: Mesa
Branch: master
Commit: 8305766e0e8d7b2b9b7db86472c213ff4307a3c7
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8305766e0e8d7b2b9b7db86472c213ff4307a3c7

Author: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Date:   Thu Jul 11 07:02:26 2019 -0700

panfrost: Wire up GLES2-class polygon offset

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>

---

 src/gallium/drivers/panfrost/pan_context.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/gallium/drivers/panfrost/pan_context.c b/src/gallium/drivers/panfrost/pan_context.c
index b3545e1748a..17752c98602 100644
--- a/src/gallium/drivers/panfrost/pan_context.c
+++ b/src/gallium/drivers/panfrost/pan_context.c
@@ -1805,6 +1805,17 @@ panfrost_bind_rasterizer_state(
         ctx->rasterizer = hwcso;
         ctx->dirty |= PAN_DIRTY_RASTERIZER;
 
+        ctx->fragment_shader_core.depth_units = ctx->rasterizer->base.offset_units;
+        ctx->fragment_shader_core.depth_factor = ctx->rasterizer->base.offset_scale;
+
+        /* Gauranteed with the core GL call, so don't expose ARB_polygon_offset */
+        assert(ctx->rasterizer->base.offset_clamp == 0.0);
+
+        /* XXX: Which bit is which? Does this maybe allow offseting not-tri? */
+
+        SET_BIT(ctx->fragment_shader_core.unknown2_4, MALI_DEPTH_RANGE_A, ctx->rasterizer->base.offset_tri);
+        SET_BIT(ctx->fragment_shader_core.unknown2_4, MALI_DEPTH_RANGE_B, ctx->rasterizer->base.offset_tri);
+
         /* Point sprites are emulated */
 
         struct panfrost_shader_state *variant =