mirror of
https://github.com/godotengine/godot.git
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057367bf4f
Introduces support for FSR2 as a new upscaler option available from the project settings. Also introduces an specific render list for surfaces that require motion and the ability to derive motion vectors from depth buffer and camera motion.
606 lines
26 KiB
C++
606 lines
26 KiB
C++
// This file is part of the FidelityFX SDK.
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//
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// Copyright (c) 2022-2023 Advanced Micro Devices, Inc. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#ifndef FFX_FSR2_SAMPLE_H
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#define FFX_FSR2_SAMPLE_H
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// suppress warnings
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#ifdef FFX_HLSL
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#pragma warning(disable: 4008) // potentially divide by zero
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#endif //FFX_HLSL
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struct FetchedBilinearSamples {
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FfxFloat32x4 fColor00;
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FfxFloat32x4 fColor10;
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FfxFloat32x4 fColor01;
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FfxFloat32x4 fColor11;
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};
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struct FetchedBicubicSamples {
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FfxFloat32x4 fColor00;
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FfxFloat32x4 fColor10;
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FfxFloat32x4 fColor20;
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FfxFloat32x4 fColor30;
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FfxFloat32x4 fColor01;
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FfxFloat32x4 fColor11;
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FfxFloat32x4 fColor21;
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FfxFloat32x4 fColor31;
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FfxFloat32x4 fColor02;
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FfxFloat32x4 fColor12;
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FfxFloat32x4 fColor22;
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FfxFloat32x4 fColor32;
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FfxFloat32x4 fColor03;
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FfxFloat32x4 fColor13;
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FfxFloat32x4 fColor23;
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FfxFloat32x4 fColor33;
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};
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#if FFX_HALF
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struct FetchedBilinearSamplesMin16 {
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FFX_MIN16_F4 fColor00;
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FFX_MIN16_F4 fColor10;
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FFX_MIN16_F4 fColor01;
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FFX_MIN16_F4 fColor11;
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};
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struct FetchedBicubicSamplesMin16 {
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FFX_MIN16_F4 fColor00;
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FFX_MIN16_F4 fColor10;
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FFX_MIN16_F4 fColor20;
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FFX_MIN16_F4 fColor30;
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FFX_MIN16_F4 fColor01;
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FFX_MIN16_F4 fColor11;
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FFX_MIN16_F4 fColor21;
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FFX_MIN16_F4 fColor31;
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FFX_MIN16_F4 fColor02;
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FFX_MIN16_F4 fColor12;
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FFX_MIN16_F4 fColor22;
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FFX_MIN16_F4 fColor32;
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FFX_MIN16_F4 fColor03;
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FFX_MIN16_F4 fColor13;
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FFX_MIN16_F4 fColor23;
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FFX_MIN16_F4 fColor33;
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};
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#else //FFX_HALF
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#define FetchedBicubicSamplesMin16 FetchedBicubicSamples
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#define FetchedBilinearSamplesMin16 FetchedBilinearSamples
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#endif //FFX_HALF
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FfxFloat32x4 Linear(FfxFloat32x4 A, FfxFloat32x4 B, FfxFloat32 t)
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{
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return A + (B - A) * t;
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}
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FfxFloat32x4 Bilinear(FetchedBilinearSamples BilinearSamples, FfxFloat32x2 fPxFrac)
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{
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FfxFloat32x4 fColorX0 = Linear(BilinearSamples.fColor00, BilinearSamples.fColor10, fPxFrac.x);
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FfxFloat32x4 fColorX1 = Linear(BilinearSamples.fColor01, BilinearSamples.fColor11, fPxFrac.x);
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FfxFloat32x4 fColorXY = Linear(fColorX0, fColorX1, fPxFrac.y);
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return fColorXY;
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}
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#if FFX_HALF
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FFX_MIN16_F4 Linear(FFX_MIN16_F4 A, FFX_MIN16_F4 B, FFX_MIN16_F t)
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{
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return A + (B - A) * t;
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}
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FFX_MIN16_F4 Bilinear(FetchedBilinearSamplesMin16 BilinearSamples, FFX_MIN16_F2 fPxFrac)
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{
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FFX_MIN16_F4 fColorX0 = Linear(BilinearSamples.fColor00, BilinearSamples.fColor10, fPxFrac.x);
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FFX_MIN16_F4 fColorX1 = Linear(BilinearSamples.fColor01, BilinearSamples.fColor11, fPxFrac.x);
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FFX_MIN16_F4 fColorXY = Linear(fColorX0, fColorX1, fPxFrac.y);
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return fColorXY;
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}
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#endif
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FfxFloat32 Lanczos2NoClamp(FfxFloat32 x)
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{
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const FfxFloat32 PI = 3.141592653589793f; // TODO: share SDK constants
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return abs(x) < FSR2_EPSILON ? 1.f : (sin(PI * x) / (PI * x)) * (sin(0.5f * PI * x) / (0.5f * PI * x));
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}
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FfxFloat32 Lanczos2(FfxFloat32 x)
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{
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x = ffxMin(abs(x), 2.0f);
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return Lanczos2NoClamp(x);
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}
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#if FFX_HALF
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#if 0
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FFX_MIN16_F Lanczos2NoClamp(FFX_MIN16_F x)
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{
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const FFX_MIN16_F PI = FFX_MIN16_F(3.141592653589793f); // TODO: share SDK constants
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return abs(x) < FFX_MIN16_F(FSR2_EPSILON) ? FFX_MIN16_F(1.f) : (sin(PI * x) / (PI * x)) * (sin(FFX_MIN16_F(0.5f) * PI * x) / (FFX_MIN16_F(0.5f) * PI * x));
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}
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#endif
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FFX_MIN16_F Lanczos2(FFX_MIN16_F x)
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{
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x = ffxMin(abs(x), FFX_MIN16_F(2.0f));
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return FFX_MIN16_F(Lanczos2NoClamp(x));
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}
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#endif //FFX_HALF
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// FSR1 lanczos approximation. Input is x*x and must be <= 4.
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FfxFloat32 Lanczos2ApproxSqNoClamp(FfxFloat32 x2)
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{
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FfxFloat32 a = (2.0f / 5.0f) * x2 - 1;
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FfxFloat32 b = (1.0f / 4.0f) * x2 - 1;
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return ((25.0f / 16.0f) * a * a - (25.0f / 16.0f - 1)) * (b * b);
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}
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#if FFX_HALF
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FFX_MIN16_F Lanczos2ApproxSqNoClamp(FFX_MIN16_F x2)
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{
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FFX_MIN16_F a = FFX_MIN16_F(2.0f / 5.0f) * x2 - FFX_MIN16_F(1);
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FFX_MIN16_F b = FFX_MIN16_F(1.0f / 4.0f) * x2 - FFX_MIN16_F(1);
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return (FFX_MIN16_F(25.0f / 16.0f) * a * a - FFX_MIN16_F(25.0f / 16.0f - 1)) * (b * b);
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}
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#endif //FFX_HALF
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FfxFloat32 Lanczos2ApproxSq(FfxFloat32 x2)
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{
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x2 = ffxMin(x2, 4.0f);
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return Lanczos2ApproxSqNoClamp(x2);
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}
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#if FFX_HALF
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FFX_MIN16_F Lanczos2ApproxSq(FFX_MIN16_F x2)
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{
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x2 = ffxMin(x2, FFX_MIN16_F(4.0f));
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return Lanczos2ApproxSqNoClamp(x2);
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}
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#endif //FFX_HALF
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FfxFloat32 Lanczos2ApproxNoClamp(FfxFloat32 x)
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{
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return Lanczos2ApproxSqNoClamp(x * x);
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}
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#if FFX_HALF
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FFX_MIN16_F Lanczos2ApproxNoClamp(FFX_MIN16_F x)
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{
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return Lanczos2ApproxSqNoClamp(x * x);
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}
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#endif //FFX_HALF
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FfxFloat32 Lanczos2Approx(FfxFloat32 x)
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{
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return Lanczos2ApproxSq(x * x);
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}
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#if FFX_HALF
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FFX_MIN16_F Lanczos2Approx(FFX_MIN16_F x)
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{
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return Lanczos2ApproxSq(x * x);
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}
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#endif //FFX_HALF
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FfxFloat32 Lanczos2_UseLUT(FfxFloat32 x)
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{
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return SampleLanczos2Weight(abs(x));
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}
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#if FFX_HALF
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FFX_MIN16_F Lanczos2_UseLUT(FFX_MIN16_F x)
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{
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return FFX_MIN16_F(SampleLanczos2Weight(abs(x)));
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}
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#endif //FFX_HALF
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FfxFloat32x4 Lanczos2_UseLUT(FfxFloat32x4 fColor0, FfxFloat32x4 fColor1, FfxFloat32x4 fColor2, FfxFloat32x4 fColor3, FfxFloat32 t)
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{
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FfxFloat32 fWeight0 = Lanczos2_UseLUT(-1.f - t);
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FfxFloat32 fWeight1 = Lanczos2_UseLUT(-0.f - t);
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FfxFloat32 fWeight2 = Lanczos2_UseLUT(+1.f - t);
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FfxFloat32 fWeight3 = Lanczos2_UseLUT(+2.f - t);
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return (fWeight0 * fColor0 + fWeight1 * fColor1 + fWeight2 * fColor2 + fWeight3 * fColor3) / (fWeight0 + fWeight1 + fWeight2 + fWeight3);
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}
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#if FFX_HALF
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FFX_MIN16_F4 Lanczos2_UseLUT(FFX_MIN16_F4 fColor0, FFX_MIN16_F4 fColor1, FFX_MIN16_F4 fColor2, FFX_MIN16_F4 fColor3, FFX_MIN16_F t)
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{
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FFX_MIN16_F fWeight0 = Lanczos2_UseLUT(FFX_MIN16_F(-1.f) - t);
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FFX_MIN16_F fWeight1 = Lanczos2_UseLUT(FFX_MIN16_F(-0.f) - t);
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FFX_MIN16_F fWeight2 = Lanczos2_UseLUT(FFX_MIN16_F(+1.f) - t);
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FFX_MIN16_F fWeight3 = Lanczos2_UseLUT(FFX_MIN16_F(+2.f) - t);
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return (fWeight0 * fColor0 + fWeight1 * fColor1 + fWeight2 * fColor2 + fWeight3 * fColor3) / (fWeight0 + fWeight1 + fWeight2 + fWeight3);
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}
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#endif
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FfxFloat32x4 Lanczos2(FfxFloat32x4 fColor0, FfxFloat32x4 fColor1, FfxFloat32x4 fColor2, FfxFloat32x4 fColor3, FfxFloat32 t)
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{
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FfxFloat32 fWeight0 = Lanczos2(-1.f - t);
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FfxFloat32 fWeight1 = Lanczos2(-0.f - t);
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FfxFloat32 fWeight2 = Lanczos2(+1.f - t);
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FfxFloat32 fWeight3 = Lanczos2(+2.f - t);
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return (fWeight0 * fColor0 + fWeight1 * fColor1 + fWeight2 * fColor2 + fWeight3 * fColor3) / (fWeight0 + fWeight1 + fWeight2 + fWeight3);
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}
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FfxFloat32x4 Lanczos2(FetchedBicubicSamples Samples, FfxFloat32x2 fPxFrac)
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{
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FfxFloat32x4 fColorX0 = Lanczos2(Samples.fColor00, Samples.fColor10, Samples.fColor20, Samples.fColor30, fPxFrac.x);
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FfxFloat32x4 fColorX1 = Lanczos2(Samples.fColor01, Samples.fColor11, Samples.fColor21, Samples.fColor31, fPxFrac.x);
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FfxFloat32x4 fColorX2 = Lanczos2(Samples.fColor02, Samples.fColor12, Samples.fColor22, Samples.fColor32, fPxFrac.x);
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FfxFloat32x4 fColorX3 = Lanczos2(Samples.fColor03, Samples.fColor13, Samples.fColor23, Samples.fColor33, fPxFrac.x);
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FfxFloat32x4 fColorXY = Lanczos2(fColorX0, fColorX1, fColorX2, fColorX3, fPxFrac.y);
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// Deringing
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// TODO: only use 4 by checking jitter
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const FfxInt32 iDeringingSampleCount = 4;
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const FfxFloat32x4 fDeringingSamples[4] = {
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Samples.fColor11,
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Samples.fColor21,
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Samples.fColor12,
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Samples.fColor22,
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};
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FfxFloat32x4 fDeringingMin = fDeringingSamples[0];
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FfxFloat32x4 fDeringingMax = fDeringingSamples[0];
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FFX_UNROLL
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for (FfxInt32 iSampleIndex = 1; iSampleIndex < iDeringingSampleCount; ++iSampleIndex) {
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fDeringingMin = ffxMin(fDeringingMin, fDeringingSamples[iSampleIndex]);
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fDeringingMax = ffxMax(fDeringingMax, fDeringingSamples[iSampleIndex]);
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}
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fColorXY = clamp(fColorXY, fDeringingMin, fDeringingMax);
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return fColorXY;
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}
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#if FFX_HALF
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FFX_MIN16_F4 Lanczos2(FFX_MIN16_F4 fColor0, FFX_MIN16_F4 fColor1, FFX_MIN16_F4 fColor2, FFX_MIN16_F4 fColor3, FFX_MIN16_F t)
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{
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FFX_MIN16_F fWeight0 = Lanczos2(FFX_MIN16_F(-1.f) - t);
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FFX_MIN16_F fWeight1 = Lanczos2(FFX_MIN16_F(-0.f) - t);
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FFX_MIN16_F fWeight2 = Lanczos2(FFX_MIN16_F(+1.f) - t);
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FFX_MIN16_F fWeight3 = Lanczos2(FFX_MIN16_F(+2.f) - t);
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return (fWeight0 * fColor0 + fWeight1 * fColor1 + fWeight2 * fColor2 + fWeight3 * fColor3) / (fWeight0 + fWeight1 + fWeight2 + fWeight3);
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}
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FFX_MIN16_F4 Lanczos2(FetchedBicubicSamplesMin16 Samples, FFX_MIN16_F2 fPxFrac)
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{
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FFX_MIN16_F4 fColorX0 = Lanczos2(Samples.fColor00, Samples.fColor10, Samples.fColor20, Samples.fColor30, fPxFrac.x);
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FFX_MIN16_F4 fColorX1 = Lanczos2(Samples.fColor01, Samples.fColor11, Samples.fColor21, Samples.fColor31, fPxFrac.x);
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FFX_MIN16_F4 fColorX2 = Lanczos2(Samples.fColor02, Samples.fColor12, Samples.fColor22, Samples.fColor32, fPxFrac.x);
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FFX_MIN16_F4 fColorX3 = Lanczos2(Samples.fColor03, Samples.fColor13, Samples.fColor23, Samples.fColor33, fPxFrac.x);
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FFX_MIN16_F4 fColorXY = Lanczos2(fColorX0, fColorX1, fColorX2, fColorX3, fPxFrac.y);
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// Deringing
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// TODO: only use 4 by checking jitter
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const FfxInt32 iDeringingSampleCount = 4;
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const FFX_MIN16_F4 fDeringingSamples[4] = {
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Samples.fColor11,
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Samples.fColor21,
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Samples.fColor12,
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Samples.fColor22,
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};
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FFX_MIN16_F4 fDeringingMin = fDeringingSamples[0];
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FFX_MIN16_F4 fDeringingMax = fDeringingSamples[0];
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FFX_UNROLL
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for (FfxInt32 iSampleIndex = 1; iSampleIndex < iDeringingSampleCount; ++iSampleIndex)
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{
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fDeringingMin = ffxMin(fDeringingMin, fDeringingSamples[iSampleIndex]);
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fDeringingMax = ffxMax(fDeringingMax, fDeringingSamples[iSampleIndex]);
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}
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fColorXY = clamp(fColorXY, fDeringingMin, fDeringingMax);
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return fColorXY;
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}
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#endif //FFX_HALF
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FfxFloat32x4 Lanczos2LUT(FetchedBicubicSamples Samples, FfxFloat32x2 fPxFrac)
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{
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FfxFloat32x4 fColorX0 = Lanczos2_UseLUT(Samples.fColor00, Samples.fColor10, Samples.fColor20, Samples.fColor30, fPxFrac.x);
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FfxFloat32x4 fColorX1 = Lanczos2_UseLUT(Samples.fColor01, Samples.fColor11, Samples.fColor21, Samples.fColor31, fPxFrac.x);
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FfxFloat32x4 fColorX2 = Lanczos2_UseLUT(Samples.fColor02, Samples.fColor12, Samples.fColor22, Samples.fColor32, fPxFrac.x);
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FfxFloat32x4 fColorX3 = Lanczos2_UseLUT(Samples.fColor03, Samples.fColor13, Samples.fColor23, Samples.fColor33, fPxFrac.x);
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FfxFloat32x4 fColorXY = Lanczos2_UseLUT(fColorX0, fColorX1, fColorX2, fColorX3, fPxFrac.y);
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// Deringing
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// TODO: only use 4 by checking jitter
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const FfxInt32 iDeringingSampleCount = 4;
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const FfxFloat32x4 fDeringingSamples[4] = {
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Samples.fColor11,
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Samples.fColor21,
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Samples.fColor12,
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Samples.fColor22,
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};
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FfxFloat32x4 fDeringingMin = fDeringingSamples[0];
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FfxFloat32x4 fDeringingMax = fDeringingSamples[0];
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FFX_UNROLL
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for (FfxInt32 iSampleIndex = 1; iSampleIndex < iDeringingSampleCount; ++iSampleIndex) {
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fDeringingMin = ffxMin(fDeringingMin, fDeringingSamples[iSampleIndex]);
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fDeringingMax = ffxMax(fDeringingMax, fDeringingSamples[iSampleIndex]);
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}
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fColorXY = clamp(fColorXY, fDeringingMin, fDeringingMax);
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return fColorXY;
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}
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#if FFX_HALF
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FFX_MIN16_F4 Lanczos2LUT(FetchedBicubicSamplesMin16 Samples, FFX_MIN16_F2 fPxFrac)
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{
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FFX_MIN16_F4 fColorX0 = Lanczos2_UseLUT(Samples.fColor00, Samples.fColor10, Samples.fColor20, Samples.fColor30, fPxFrac.x);
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FFX_MIN16_F4 fColorX1 = Lanczos2_UseLUT(Samples.fColor01, Samples.fColor11, Samples.fColor21, Samples.fColor31, fPxFrac.x);
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FFX_MIN16_F4 fColorX2 = Lanczos2_UseLUT(Samples.fColor02, Samples.fColor12, Samples.fColor22, Samples.fColor32, fPxFrac.x);
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FFX_MIN16_F4 fColorX3 = Lanczos2_UseLUT(Samples.fColor03, Samples.fColor13, Samples.fColor23, Samples.fColor33, fPxFrac.x);
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FFX_MIN16_F4 fColorXY = Lanczos2_UseLUT(fColorX0, fColorX1, fColorX2, fColorX3, fPxFrac.y);
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// Deringing
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// TODO: only use 4 by checking jitter
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const FfxInt32 iDeringingSampleCount = 4;
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const FFX_MIN16_F4 fDeringingSamples[4] = {
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Samples.fColor11,
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Samples.fColor21,
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Samples.fColor12,
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Samples.fColor22,
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};
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|
|
FFX_MIN16_F4 fDeringingMin = fDeringingSamples[0];
|
|
FFX_MIN16_F4 fDeringingMax = fDeringingSamples[0];
|
|
|
|
FFX_UNROLL
|
|
for (FfxInt32 iSampleIndex = 1; iSampleIndex < iDeringingSampleCount; ++iSampleIndex)
|
|
{
|
|
fDeringingMin = ffxMin(fDeringingMin, fDeringingSamples[iSampleIndex]);
|
|
fDeringingMax = ffxMax(fDeringingMax, fDeringingSamples[iSampleIndex]);
|
|
}
|
|
|
|
fColorXY = clamp(fColorXY, fDeringingMin, fDeringingMax);
|
|
|
|
return fColorXY;
|
|
}
|
|
#endif //FFX_HALF
|
|
|
|
|
|
|
|
FfxFloat32x4 Lanczos2Approx(FfxFloat32x4 fColor0, FfxFloat32x4 fColor1, FfxFloat32x4 fColor2, FfxFloat32x4 fColor3, FfxFloat32 t)
|
|
{
|
|
FfxFloat32 fWeight0 = Lanczos2ApproxNoClamp(-1.f - t);
|
|
FfxFloat32 fWeight1 = Lanczos2ApproxNoClamp(-0.f - t);
|
|
FfxFloat32 fWeight2 = Lanczos2ApproxNoClamp(+1.f - t);
|
|
FfxFloat32 fWeight3 = Lanczos2ApproxNoClamp(+2.f - t);
|
|
return (fWeight0 * fColor0 + fWeight1 * fColor1 + fWeight2 * fColor2 + fWeight3 * fColor3) / (fWeight0 + fWeight1 + fWeight2 + fWeight3);
|
|
}
|
|
|
|
#if FFX_HALF
|
|
FFX_MIN16_F4 Lanczos2Approx(FFX_MIN16_F4 fColor0, FFX_MIN16_F4 fColor1, FFX_MIN16_F4 fColor2, FFX_MIN16_F4 fColor3, FFX_MIN16_F t)
|
|
{
|
|
FFX_MIN16_F fWeight0 = Lanczos2ApproxNoClamp(FFX_MIN16_F(-1.f) - t);
|
|
FFX_MIN16_F fWeight1 = Lanczos2ApproxNoClamp(FFX_MIN16_F(-0.f) - t);
|
|
FFX_MIN16_F fWeight2 = Lanczos2ApproxNoClamp(FFX_MIN16_F(+1.f) - t);
|
|
FFX_MIN16_F fWeight3 = Lanczos2ApproxNoClamp(FFX_MIN16_F(+2.f) - t);
|
|
return (fWeight0 * fColor0 + fWeight1 * fColor1 + fWeight2 * fColor2 + fWeight3 * fColor3) / (fWeight0 + fWeight1 + fWeight2 + fWeight3);
|
|
}
|
|
#endif //FFX_HALF
|
|
|
|
FfxFloat32x4 Lanczos2Approx(FetchedBicubicSamples Samples, FfxFloat32x2 fPxFrac)
|
|
{
|
|
FfxFloat32x4 fColorX0 = Lanczos2Approx(Samples.fColor00, Samples.fColor10, Samples.fColor20, Samples.fColor30, fPxFrac.x);
|
|
FfxFloat32x4 fColorX1 = Lanczos2Approx(Samples.fColor01, Samples.fColor11, Samples.fColor21, Samples.fColor31, fPxFrac.x);
|
|
FfxFloat32x4 fColorX2 = Lanczos2Approx(Samples.fColor02, Samples.fColor12, Samples.fColor22, Samples.fColor32, fPxFrac.x);
|
|
FfxFloat32x4 fColorX3 = Lanczos2Approx(Samples.fColor03, Samples.fColor13, Samples.fColor23, Samples.fColor33, fPxFrac.x);
|
|
FfxFloat32x4 fColorXY = Lanczos2Approx(fColorX0, fColorX1, fColorX2, fColorX3, fPxFrac.y);
|
|
|
|
// Deringing
|
|
|
|
// TODO: only use 4 by checking jitter
|
|
const FfxInt32 iDeringingSampleCount = 4;
|
|
const FfxFloat32x4 fDeringingSamples[4] = {
|
|
Samples.fColor11,
|
|
Samples.fColor21,
|
|
Samples.fColor12,
|
|
Samples.fColor22,
|
|
};
|
|
|
|
FfxFloat32x4 fDeringingMin = fDeringingSamples[0];
|
|
FfxFloat32x4 fDeringingMax = fDeringingSamples[0];
|
|
|
|
FFX_UNROLL
|
|
for (FfxInt32 iSampleIndex = 1; iSampleIndex < iDeringingSampleCount; ++iSampleIndex)
|
|
{
|
|
fDeringingMin = ffxMin(fDeringingMin, fDeringingSamples[iSampleIndex]);
|
|
fDeringingMax = ffxMax(fDeringingMax, fDeringingSamples[iSampleIndex]);
|
|
}
|
|
|
|
fColorXY = clamp(fColorXY, fDeringingMin, fDeringingMax);
|
|
|
|
return fColorXY;
|
|
}
|
|
|
|
#if FFX_HALF
|
|
FFX_MIN16_F4 Lanczos2Approx(FetchedBicubicSamplesMin16 Samples, FFX_MIN16_F2 fPxFrac)
|
|
{
|
|
FFX_MIN16_F4 fColorX0 = Lanczos2Approx(Samples.fColor00, Samples.fColor10, Samples.fColor20, Samples.fColor30, fPxFrac.x);
|
|
FFX_MIN16_F4 fColorX1 = Lanczos2Approx(Samples.fColor01, Samples.fColor11, Samples.fColor21, Samples.fColor31, fPxFrac.x);
|
|
FFX_MIN16_F4 fColorX2 = Lanczos2Approx(Samples.fColor02, Samples.fColor12, Samples.fColor22, Samples.fColor32, fPxFrac.x);
|
|
FFX_MIN16_F4 fColorX3 = Lanczos2Approx(Samples.fColor03, Samples.fColor13, Samples.fColor23, Samples.fColor33, fPxFrac.x);
|
|
FFX_MIN16_F4 fColorXY = Lanczos2Approx(fColorX0, fColorX1, fColorX2, fColorX3, fPxFrac.y);
|
|
|
|
// Deringing
|
|
|
|
// TODO: only use 4 by checking jitter
|
|
const FfxInt32 iDeringingSampleCount = 4;
|
|
const FFX_MIN16_F4 fDeringingSamples[4] = {
|
|
Samples.fColor11,
|
|
Samples.fColor21,
|
|
Samples.fColor12,
|
|
Samples.fColor22,
|
|
};
|
|
|
|
FFX_MIN16_F4 fDeringingMin = fDeringingSamples[0];
|
|
FFX_MIN16_F4 fDeringingMax = fDeringingSamples[0];
|
|
|
|
FFX_UNROLL
|
|
for (FfxInt32 iSampleIndex = 1; iSampleIndex < iDeringingSampleCount; ++iSampleIndex)
|
|
{
|
|
fDeringingMin = ffxMin(fDeringingMin, fDeringingSamples[iSampleIndex]);
|
|
fDeringingMax = ffxMax(fDeringingMax, fDeringingSamples[iSampleIndex]);
|
|
}
|
|
|
|
fColorXY = clamp(fColorXY, fDeringingMin, fDeringingMax);
|
|
|
|
return fColorXY;
|
|
}
|
|
#endif
|
|
|
|
// Clamp by offset direction. Assuming iPxSample is already in range and iPxOffset is compile time constant.
|
|
FfxInt32x2 ClampCoord(FfxInt32x2 iPxSample, FfxInt32x2 iPxOffset, FfxInt32x2 iTextureSize)
|
|
{
|
|
FfxInt32x2 result = iPxSample + iPxOffset;
|
|
result.x = (iPxOffset.x < 0) ? ffxMax(result.x, 0) : result.x;
|
|
result.x = (iPxOffset.x > 0) ? ffxMin(result.x, iTextureSize.x - 1) : result.x;
|
|
result.y = (iPxOffset.y < 0) ? ffxMax(result.y, 0) : result.y;
|
|
result.y = (iPxOffset.y > 0) ? ffxMin(result.y, iTextureSize.y - 1) : result.y;
|
|
return result;
|
|
}
|
|
#if FFX_HALF
|
|
FFX_MIN16_I2 ClampCoord(FFX_MIN16_I2 iPxSample, FFX_MIN16_I2 iPxOffset, FFX_MIN16_I2 iTextureSize)
|
|
{
|
|
FFX_MIN16_I2 result = iPxSample + iPxOffset;
|
|
result.x = (iPxOffset.x < FFX_MIN16_I(0)) ? ffxMax(result.x, FFX_MIN16_I(0)) : result.x;
|
|
result.x = (iPxOffset.x > FFX_MIN16_I(0)) ? ffxMin(result.x, iTextureSize.x - FFX_MIN16_I(1)) : result.x;
|
|
result.y = (iPxOffset.y < FFX_MIN16_I(0)) ? ffxMax(result.y, FFX_MIN16_I(0)) : result.y;
|
|
result.y = (iPxOffset.y > FFX_MIN16_I(0)) ? ffxMin(result.y, iTextureSize.y - FFX_MIN16_I(1)) : result.y;
|
|
return result;
|
|
}
|
|
#endif //FFX_HALF
|
|
|
|
|
|
#define DeclareCustomFetchBicubicSamplesWithType(SampleType, TextureType, AddrType, Name, LoadTexture) \
|
|
SampleType Name(AddrType iPxSample, AddrType iTextureSize) \
|
|
{ \
|
|
SampleType Samples; \
|
|
\
|
|
Samples.fColor00 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(-1, -1), iTextureSize))); \
|
|
Samples.fColor10 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+0, -1), iTextureSize))); \
|
|
Samples.fColor20 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+1, -1), iTextureSize))); \
|
|
Samples.fColor30 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+2, -1), iTextureSize))); \
|
|
\
|
|
Samples.fColor01 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(-1, +0), iTextureSize))); \
|
|
Samples.fColor11 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+0, +0), iTextureSize))); \
|
|
Samples.fColor21 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+1, +0), iTextureSize))); \
|
|
Samples.fColor31 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+2, +0), iTextureSize))); \
|
|
\
|
|
Samples.fColor02 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(-1, +1), iTextureSize))); \
|
|
Samples.fColor12 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+0, +1), iTextureSize))); \
|
|
Samples.fColor22 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+1, +1), iTextureSize))); \
|
|
Samples.fColor32 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+2, +1), iTextureSize))); \
|
|
\
|
|
Samples.fColor03 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(-1, +2), iTextureSize))); \
|
|
Samples.fColor13 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+0, +2), iTextureSize))); \
|
|
Samples.fColor23 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+1, +2), iTextureSize))); \
|
|
Samples.fColor33 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+2, +2), iTextureSize))); \
|
|
\
|
|
return Samples; \
|
|
}
|
|
|
|
#define DeclareCustomFetchBicubicSamples(Name, LoadTexture) \
|
|
DeclareCustomFetchBicubicSamplesWithType(FetchedBicubicSamples, FfxFloat32x4, FfxInt32x2, Name, LoadTexture)
|
|
|
|
#define DeclareCustomFetchBicubicSamplesMin16(Name, LoadTexture) \
|
|
DeclareCustomFetchBicubicSamplesWithType(FetchedBicubicSamplesMin16, FFX_MIN16_F4, FfxInt32x2, Name, LoadTexture)
|
|
|
|
#define DeclareCustomFetchBilinearSamplesWithType(SampleType, TextureType,AddrType, Name, LoadTexture) \
|
|
SampleType Name(AddrType iPxSample, AddrType iTextureSize) \
|
|
{ \
|
|
SampleType Samples; \
|
|
Samples.fColor00 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+0, +0), iTextureSize))); \
|
|
Samples.fColor10 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+1, +0), iTextureSize))); \
|
|
Samples.fColor01 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+0, +1), iTextureSize))); \
|
|
Samples.fColor11 = TextureType(LoadTexture(ClampCoord(iPxSample, AddrType(+1, +1), iTextureSize))); \
|
|
return Samples; \
|
|
}
|
|
|
|
#define DeclareCustomFetchBilinearSamples(Name, LoadTexture) \
|
|
DeclareCustomFetchBilinearSamplesWithType(FetchedBilinearSamples, FfxFloat32x4, FfxInt32x2, Name, LoadTexture)
|
|
|
|
#define DeclareCustomFetchBilinearSamplesMin16(Name, LoadTexture) \
|
|
DeclareCustomFetchBilinearSamplesWithType(FetchedBilinearSamplesMin16, FFX_MIN16_F4, FfxInt32x2, Name, LoadTexture)
|
|
|
|
// BE CAREFUL: there is some precision issues and (3253, 125) leading to (3252.9989778, 125.001102)
|
|
// is common, so iPxSample can "jitter"
|
|
#define DeclareCustomTextureSample(Name, InterpolateSamples, FetchSamples) \
|
|
FfxFloat32x4 Name(FfxFloat32x2 fUvSample, FfxInt32x2 iTextureSize) \
|
|
{ \
|
|
FfxFloat32x2 fPxSample = (fUvSample * FfxFloat32x2(iTextureSize)) - FfxFloat32x2(0.5f, 0.5f); \
|
|
/* Clamp base coords */ \
|
|
fPxSample.x = ffxMax(0.0f, ffxMin(FfxFloat32(iTextureSize.x), fPxSample.x)); \
|
|
fPxSample.y = ffxMax(0.0f, ffxMin(FfxFloat32(iTextureSize.y), fPxSample.y)); \
|
|
/* */ \
|
|
FfxInt32x2 iPxSample = FfxInt32x2(floor(fPxSample)); \
|
|
FfxFloat32x2 fPxFrac = ffxFract(fPxSample); \
|
|
FfxFloat32x4 fColorXY = FfxFloat32x4(InterpolateSamples(FetchSamples(iPxSample, iTextureSize), fPxFrac)); \
|
|
return fColorXY; \
|
|
}
|
|
|
|
#define DeclareCustomTextureSampleMin16(Name, InterpolateSamples, FetchSamples) \
|
|
FFX_MIN16_F4 Name(FfxFloat32x2 fUvSample, FfxInt32x2 iTextureSize) \
|
|
{ \
|
|
FfxFloat32x2 fPxSample = (fUvSample * FfxFloat32x2(iTextureSize)) - FfxFloat32x2(0.5f, 0.5f); \
|
|
/* Clamp base coords */ \
|
|
fPxSample.x = ffxMax(0.0f, ffxMin(FfxFloat32(iTextureSize.x), fPxSample.x)); \
|
|
fPxSample.y = ffxMax(0.0f, ffxMin(FfxFloat32(iTextureSize.y), fPxSample.y)); \
|
|
/* */ \
|
|
FfxInt32x2 iPxSample = FfxInt32x2(floor(fPxSample)); \
|
|
FFX_MIN16_F2 fPxFrac = FFX_MIN16_F2(ffxFract(fPxSample)); \
|
|
FFX_MIN16_F4 fColorXY = FFX_MIN16_F4(InterpolateSamples(FetchSamples(iPxSample, iTextureSize), fPxFrac)); \
|
|
return fColorXY; \
|
|
}
|
|
|
|
#define FFX_FSR2_CONCAT_ID(x, y) x ## y
|
|
#define FFX_FSR2_CONCAT(x, y) FFX_FSR2_CONCAT_ID(x, y)
|
|
#define FFX_FSR2_SAMPLER_1D_0 Lanczos2
|
|
#define FFX_FSR2_SAMPLER_1D_1 Lanczos2LUT
|
|
#define FFX_FSR2_SAMPLER_1D_2 Lanczos2Approx
|
|
|
|
#define FFX_FSR2_GET_LANCZOS_SAMPLER1D(x) FFX_FSR2_CONCAT(FFX_FSR2_SAMPLER_1D_, x)
|
|
|
|
#endif //!defined( FFX_FSR2_SAMPLE_H )
|