зеркало из https://github.com/mozilla/gecko-dev.git
38 строки
963 B
HLSL
38 строки
963 B
HLSL
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "common.hlsl"
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sampler sSampler : register(ps, s0);
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sampler sMaskSampler : register(ps, s1);
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Texture2D tMaskTexture : register(ps, t4);
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cbuffer MaskInformation : register(b0)
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{
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float sOpacity : packoffset(c0.x);
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uint sHasMask : packoffset(c0.y);
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};
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float2 MaskCoordsToUV(float3 aMaskCoords)
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{
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return aMaskCoords.xy / aMaskCoords.z;
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}
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float ReadMaskWithOpacity(float3 aMaskCoords, float aOpacity)
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{
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if (!sHasMask) {
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return aOpacity;
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}
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float2 uv = MaskCoordsToUV(aMaskCoords);
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float r = tMaskTexture.Sample(sMaskSampler, uv).r;
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return min(aOpacity, r);
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}
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float ReadMask(float3 aMaskCoords)
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{
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return ReadMaskWithOpacity(aMaskCoords, sOpacity);
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}
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