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using Ryujinx.Graphics.GAL;
using Ryujinx.Graphics.GAL.Sampler;
namespace Ryujinx.Graphics.Gpu.Image
{
struct SamplerDescriptor
{
private static readonly float[] _f5ToF32ConversionLut = new float[]
{
0.0f,
0.055555556f,
0.1f,
0.13636364f,
0.16666667f,
0.1923077f,
0.21428572f,
0.23333333f,
0.25f,
0.2777778f,
0.3f,
0.3181818f,
0.33333334f,
0.34615386f,
0.35714287f,
0.36666667f,
0.375f,
0.3888889f,
0.4f,
0.4090909f,
0.41666666f,
0.42307693f,
0.42857143f,
0.43333334f,
0.4375f,
0.44444445f,
0.45f,
0.45454547f,
0.45833334f,
0.46153846f,
0.4642857f,
0.46666667f
};
private static readonly float[] _maxAnisotropyLut = new float[]
{
1, 2, 4, 6, 8, 10, 12, 16
};
private const float Frac8ToF32 = 1.0f / 256.0f;
public uint Word0;
public uint Word1;
public uint Word2;
public uint Word3;
public uint BorderColorR;
public uint BorderColorG;
public uint BorderColorB;
public uint BorderColorA;
public AddressMode UnpackAddressU()
{
return (AddressMode)(Word0 & 7);
}
public AddressMode UnpackAddressV()
{
return (AddressMode)((Word0 >> 3) & 7);
}
public AddressMode UnpackAddressP()
{
return (AddressMode)((Word0 >> 6) & 7);
}
public CompareMode UnpackCompareMode()
{
return (CompareMode)((Word0 >> 9) & 1);
}
public CompareOp UnpackCompareOp()
{
return (CompareOp)(((Word0 >> 10) & 7) + 1);
}
public float UnpackMaxAnisotropy()
{
return _maxAnisotropyLut[(Word0 >> 20) & 7];
}
public MagFilter UnpackMagFilter()
{
return (MagFilter)(Word1 & 3);
}
public MinFilter UnpackMinFilter()
{
SamplerMinFilter minFilter = (SamplerMinFilter)((Word1 >> 4) & 3);
SamplerMipFilter mipFilter = (SamplerMipFilter)((Word1 >> 6) & 3);
return ConvertFilter(minFilter, mipFilter);
}
private static MinFilter ConvertFilter(SamplerMinFilter minFilter, SamplerMipFilter mipFilter)
{
switch (mipFilter)
{
case SamplerMipFilter.None:
switch (minFilter)
{
case SamplerMinFilter.Nearest: return MinFilter.Nearest;
case SamplerMinFilter.Linear: return MinFilter.Linear;
}
break;
case SamplerMipFilter.Nearest:
switch (minFilter)
{
case SamplerMinFilter.Nearest: return MinFilter.NearestMipmapNearest;
case SamplerMinFilter.Linear: return MinFilter.LinearMipmapNearest;
}
break;
case SamplerMipFilter.Linear:
switch (minFilter)
{
case SamplerMinFilter.Nearest: return MinFilter.NearestMipmapLinear;
case SamplerMinFilter.Linear: return MinFilter.LinearMipmapLinear;
}
break;
}
return MinFilter.Nearest;
}
public ReductionFilter UnpackReductionFilter()
{
return (ReductionFilter)((Word1 >> 10) & 3);
}
public float UnpackMipLodBias()
{
int fixedValue = (int)(Word1 >> 12) & 0x1fff;
fixedValue = (fixedValue << 19) >> 19;
return fixedValue * Frac8ToF32;
}
public float UnpackLodSnap()
{
return _f5ToF32ConversionLut[(Word1 >> 26) & 0x1f];
}
public float UnpackMinLod()
{
return (Word2 & 0xfff) * Frac8ToF32;
}
public float UnpackMaxLod()
{
return ((Word2 >> 12) & 0xfff) * Frac8ToF32;
}
}
}
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