mirror of
https://bitbucket.org/CPMADevs/cnq3
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62 lines
1.8 KiB
HLSL
62 lines
1.8 KiB
HLSL
/*
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===========================================================================
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Copyright (C) 2019 Gian 'myT' Schellenbaum
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This file is part of Challenge Quake 3 (CNQ3).
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Challenge Quake 3 is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Challenge Quake 3 is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Challenge Quake 3. If not, see <https://www.gnu.org/licenses/>.
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===========================================================================
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*/
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// 8-tap 1D filter compute shader
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Texture2D<float4> src : register(t0);
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RWTexture2D<float4> dst : register(u0);
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cbuffer Constants : register(b0)
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{
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float4 weights;
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int2 maxSize;
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int2 scale;
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int2 offset;
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uint clampMode; // 0 = repeat
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uint dummy;
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}
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uint2 FixCoords(int2 c)
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{
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if(clampMode > 0)
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{
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// clamp
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return uint2(clamp(c, int2(0, 0), maxSize));
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}
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// repeat
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return uint2(c & maxSize);
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}
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[numthreads(8, 8, 1)]
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void cs_main(uint3 id : SV_DispatchThreadID)
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{
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int2 base = int2(id.xy) * scale;
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float4 r = float4(0, 0, 0, 0);
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r += src[FixCoords(base - offset * 3)] * weights.x;
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r += src[FixCoords(base - offset * 2)] * weights.y;
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r += src[FixCoords(base - offset * 1)] * weights.z;
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r += src[ base ] * weights.w;
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r += src[ base + offset ] * weights.w;
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r += src[FixCoords(base + offset * 2)] * weights.z;
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r += src[FixCoords(base + offset * 3)] * weights.y;
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r += src[FixCoords(base + offset * 4)] * weights.x;
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dst[id.xy] = r;
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}
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