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43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/*
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* RGB <--> HSV conversion in integer arithmetics, to be used on Windows.
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* Copyright (c) 2013 Martin Mitas
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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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
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* THE 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
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef HSV_H
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#define HSV_H
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#define HUE_DEGREE 1
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typedef struct hsv_tag hsv_t;
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struct hsv_tag {
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unsigned int hue; /* 0 ... (360*HUE_DEGREE - 1) */
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unsigned char saturation; /* 0 ... 255 */
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unsigned char value; /* 0 ... 255 */
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};
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void rgb2hsv(unsigned int rgb, hsv_t* hsv);
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unsigned int hsv2rgb(hsv_t* hsv);
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#endif /* HSV_H */
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