mirror of https://bitbucket.org/CPMADevs/cnq3
30 lines
1.1 KiB
HLSL
30 lines
1.1 KiB
HLSL
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/*
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===========================================================================
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Copyright (C) 2022 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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// shared functions
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float4 MakeGreyscale(float4 input, float amount)
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{
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float grey = dot(input.rgb, float3(0.299, 0.587, 0.114));
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float4 result = lerp(input, float4(grey, grey, grey, input.a), amount);
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return result;
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}
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