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49 lines
2.5 KiB
Plaintext
49 lines
2.5 KiB
Plaintext
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* 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 IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#ifndef BLENDING_HGLSL
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#define BLENDING_HGLSL
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vec4 blendOver(vec4 oldColor, vec4 newColor)
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{
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vec4 toReturn;
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toReturn.rgb =
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(newColor.rgb * newColor.a + oldColor.rgb * oldColor.a * (1 - newColor.a)) /
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(newColor.a + oldColor.a * (1 - newColor.a));
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toReturn.a = newColor.a + oldColor.a * (1 - newColor.a);
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return toReturn;
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}
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vec4 blendMultiply(vec4 oldColor, vec4 newColor)
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{
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return oldColor * newColor;
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}
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vec4 blendAdd(vec4 oldColor, vec4 newColor)
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{
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return oldColor + newColor;
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}
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#endif |