Zebediah Figura : tests: Add a test for SampleBias() with multiple mipmap levels.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: 6129399b4f96a524319e17525e54542392b52e17
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/6129399b4f96a524319e17525e5454...

Author: Zebediah Figura <zfigura(a)codeweavers.com>
Date:   Sun Apr 30 23:31:33 2023 -0500

tests: Add a test for SampleBias() with multiple mipmap levels.

---

 Makefile.am                   |  1 +
 tests/sample-bias.shader_test | 43 +++++++++++++++++++++++++++++++++++++++++++
 tests/sampler.shader_test     | 14 --------------
 3 files changed, 44 insertions(+), 14 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index f5cee9a6..e06d0eeb 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -157,6 +157,7 @@ vkd3d_shader_tests = \
 	tests/register-reservations.shader_test \
 	tests/return.shader_test \
 	tests/round.shader_test \
+	tests/sample-bias.shader_test \
 	tests/sample-level.shader_test \
 	tests/sampler.shader_test \
 	tests/sampler-offset.shader_test \
diff --git a/tests/sample-bias.shader_test b/tests/sample-bias.shader_test
new file mode 100644
index 00000000..08e50696
--- /dev/null
+++ b/tests/sample-bias.shader_test
@@ -0,0 +1,43 @@
+[sampler 0]
+filter linear linear linear
+address clamp clamp clamp
+
+[texture 0]
+size (2, 2)
+levels 2
+
+1.0 0.0 1.0 0.0     1.0 0.0 1.0 0.0
+1.0 0.0 1.0 0.0     1.0 0.0 1.0 0.0
+
+0.0 0.0 1.0 0.0
+
+[vertex shader]
+void main(out float2 tex : texcoord, inout float4 pos : sv_position)
+{
+    tex = pos.xy;
+}
+
+[pixel shader]
+sampler s;
+Texture2D t;
+uniform float bias;
+
+float4 main(float2 coord : texcoord) : sv_target
+{
+    /* Choice of initial mipmap level is hardware-dependent, and in practice
+     * varies too much to be reasonably covered by ULPS. Quantize instead. */
+    return floor(t.SampleBias(s, coord, bias) * 10);
+}
+
+[test]
+uniform 0 float4 6.5 0.0 0.0 0.0
+draw quad
+probe all rgba (10.0, 0.0, 10.0, 0.0)
+
+uniform 0 float4 7.5 0.0 0.0 0.0
+draw quad
+probe all rgba (4.0, 0.0, 10.0, 0.0)
+
+uniform 0 float4 8.5 0.0 0.0 0.0
+draw quad
+probe all rgba (0.0, 0.0, 10.0, 0.0)
diff --git a/tests/sampler.shader_test b/tests/sampler.shader_test
index dfae6140..628c3186 100644
--- a/tests/sampler.shader_test
+++ b/tests/sampler.shader_test
@@ -33,20 +33,6 @@ float4 main() : sv_target
 draw quad
 probe all rgba (0.25, 0, 0.25, 0)
 
-[pixel shader]
-SamplerState s;
-Texture2D t;
-
-float4 main() : sv_target
-{
-    return t.SampleBias(s, float2(0.5, 0.5), 0.0);
-}
-
-[test]
-draw quad
-probe all rgba (0.25, 0, 0.25, 0)
-
-
 [pixel shader fail]
 sampler2D s;