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tests: Add tests for ddx(), ddy() intrinsics.

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Thanks to Giovanni for the second set of tests! Note that the
tolerance for the final pixel was set much higher than the others;
this test seems to be an issue for some devices (in my case, a 7900
XTX running RADV).

Co-authored-by: Giovanni Mascellani <gmascellani@codeweavers.com>
Signed-off-by: Ethan Lee <flibitijibibo@gmail.com>
This commit is contained in:
Ethan Lee 2023-04-26 10:29:14 -04:00 committed by Alexandre Julliard
parent 138c32ce88
commit d3876e49bc
Notes: Alexandre Julliard 2023-04-28 22:02:10 +02:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Zebediah Figura (@zfigura)
Approved-by: Francisco Casas (@fcasas)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/179
2 changed files with 27 additions and 0 deletions
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1
Makefile.am
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@ -63,6 +63,7 @@ vkd3d_shader_tests = \
tests/cbuffer.shader_test \
tests/compute.shader_test \
tests/conditional.shader_test \
tests/ddxddy.shader_test \
tests/distance.shader_test \
tests/entry-point-semantics.shader_test \
tests/exp.shader_test \

26
tests/ddxddy.shader_test Normal file
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@ -0,0 +1,26 @@
[pixel shader]
float4 main(float4 pos : sv_position) : sv_target
{
return float4(ddx(pos.x), ddy(pos.y), 0, 0);
}
[test]
draw quad
probe all rgba (1.0, 1.0, 0.0, 0.0)
[pixel shader]
float4 main(float4 pos : sv_position) : sv_target
{
pos /= 10.0;
float nonlinear = pos.x * pos.y - pos.x * (pos.x + 0.5);
return float4(nonlinear, ddx(nonlinear), ddy(nonlinear), 0.0);
}
[test]
draw quad
probe (10, 10) rgba (-0.524999976, -0.164999843, 0.104999900, 0.0) 8
probe (11, 10) rgba (-0.689999819, -0.164999843, 0.104999900, 0.0) 8
probe (10, 11) rgba (-0.420000076, -0.164999843, 0.104999900, 0.0) 8
probe (11, 11) rgba (-0.574999928, -0.164999843, 0.104999900, 0.0) 8
probe (12, 10) rgba (-0.874999881, -0.205000162, 0.124999881, 0.0) 8
probe (150, 150) rgba (-7.52500916, -1.56500244, 1.50500488, 0.0) 40