This represents a float vec4 constant color, as passed to glBlendColor.
While the existing 4 shader sysvals are retained to minimize code churn,
a single vectorized intrinsic is required for efficient blending on
vector architectures. (This may also apply to archictectures like
Bifrost where ALU is scalar but load/store is vector; it largely depends
on how blending is implemented per-driver.)
Signed-off-by: Alyssa Rosenzweig <aly...@rosenzweig.io>
Cc: Eric Anholt <e...@anholt.net>
Cc: Kenneth Graunke <kenn...@whitecape.org>
---
src/compiler/nir/nir_intrinsics.py | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/src/compiler/nir/nir_intrinsics.py
b/src/compiler/nir/nir_intrinsics.py
index 3a0470c2ca1..df459a3cdec 100644
--- a/src/compiler/nir/nir_intrinsics.py
+++ b/src/compiler/nir/nir_intrinsics.py
@@ -568,11 +568,14 @@ system_value("viewport_z_offset", 1)
system_value("viewport_scale", 3)
system_value("viewport_offset", 3)
-# Blend constant color values. Float values are clamped.#
+# Blend constant color values. Float values are clamped. Vectored versions are
+# provided as well for driver convenience
+
system_value("blend_const_color_r_float", 1)
system_value("blend_const_color_g_float", 1)
system_value("blend_const_color_b_float", 1)
system_value("blend_const_color_a_float", 1)
+system_value("blend_const_color_rgba", 4)
system_value("blend_const_color_rgba8888_unorm", 1)
system_value("blend_const_color_aaaa8888_unorm", 1)
--
2.20.1
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/mesa-dev
