42 lines
1.3 KiB
HLSL
42 lines
1.3 KiB
HLSL
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// Copyright (c) Microsoft Corporation.
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// Licensed under the MIT License.
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//
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// http://go.microsoft.com/fwlink/?LinkID=615561
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#define GenerateMipsRS
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"RootFlags ( DENY_VERTEX_SHADER_ROOT_ACCESS |"
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" DENY_DOMAIN_SHADER_ROOT_ACCESS |"
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" DENY_GEOMETRY_SHADER_ROOT_ACCESS |"
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" DENY_HULL_SHADER_ROOT_ACCESS |"
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" DENY_PIXEL_SHADER_ROOT_ACCESS ),"
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"DescriptorTable ( SRV(t0, flags=DATA_VOLATILE|DESCRIPTORS_VOLATILE) ),"
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"DescriptorTable ( UAV(u0, flags=DATA_VOLATILE|DESCRIPTORS_VOLATILE) ),"
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"RootConstants(num32BitConstants=3, b0),"
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"StaticSampler(s0,"
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" filter = FILTER_MIN_MAG_LINEAR_MIP_POINT,"
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" addressU = TEXTURE_ADDRESS_CLAMP,"
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" addressV = TEXTURE_ADDRESS_CLAMP,"
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" addressW = TEXTURE_ADDRESS_CLAMP )"
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SamplerState Sampler : register(s0);
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Texture2D<float4> SrcMip : register(t0);
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RWTexture2D<float4> OutMip : register(u0);
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cbuffer MipConstants : register(b0)
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{
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float2 InvOutTexelSize; // texel size for OutMip (NOT SrcMip)
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uint SrcMipIndex;
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}
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float4 Mip(uint2 coord)
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{
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float2 uv = (coord.xy + 0.5) * InvOutTexelSize;
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return SrcMip.SampleLevel(Sampler, uv, SrcMipIndex);
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}
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[RootSignature(GenerateMipsRS)]
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[numthreads(8, 8, 1)]
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void main(uint3 DTid : SV_DispatchThreadID)
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{
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OutMip[DTid.xy] = Mip(DTid.xy);
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}
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