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vkd3d-shader/hlsl: Add fwidth() function.

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Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
This commit is contained in:
Nikolay Sivov
2023-09-07 02:09:36 +02:00
committed by Alexandre Julliard
parent 8087cc01f7
commit b5c0c9c22f
Notes: Alexandre Julliard 2023-10-05 22:36:39 +02:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Zebediah Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/330
3 changed files with 55 additions and 0 deletions
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26
tests/hlsl/fwidth.shader_test Normal file
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[require]
shader model >= 3.0
[pixel shader]
float4 main(float4 pos : sv_position) : sv_target
{
// Shader models < 4 don't add 0.5 to sv_position, so this adjustment is required to get the
// same outputs.
pos.x = floor(pos.x) + 0.5;
pos.y = floor(pos.y) + 0.5;
pos /= 10.0;
float nonlinear = pos.x * pos.y - pos.x * (pos.x + 0.5);
float4 res = fwidth(nonlinear);
// Each device may use either the coarse or the fine derivate, so use quantization.
return round(30 * res);
}
[test]
draw quad
probe (10, 10) rgba (8.0, 8.0, 8.0, 8.0)
probe (11, 10) rgba (8.0, 8.0, 8.0, 8.0)
probe (12, 10) rgba (10.0, 10.0, 10.0, 10.0)
probe (16, 16) rgba (12.0, 12.0, 12.0, 12.0)
probe (150, 150) rgba (92.0, 92.0, 92.0, 92.0)