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hsluv.h

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+/*
+ * HSLuv-C: Human-friendly HSL
+ * <https://github.com/hsluv/hsluv-c>
+ * <https://www.hsluv.org/>
+ *
+ * Copyright (c) 2015 Alexei Boronine (original idea, JavaScript implementation)
+ * Copyright (c) 2015 Roger Tallada (Obj-C implementation)
+ * Copyright (c) 2017 Martin Mitas (C implementation, based on Obj-C implementation)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef HSLUV_H
+#define HSLUV_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/**
+ * Convert HSLuv to RGB.
+ *
+ * @param h Hue. Between 0.0 and 360.0.
+ * @param s Saturation. Between 0.0 and 100.0.
+ * @param l Lightness. Between 0.0 and 100.0.
+ * @param[out] pr Red component. Between 0.0 and 1.0.
+ * @param[out] pg Green component. Between 0.0 and 1.0.
+ * @param[out] pb Blue component. Between 0.0 and 1.0.
+ */
+void hsluv2rgb(double h, double s, double l, double* pr, double* pg, double* pb);
+
+/**
+ * Convert RGB to HSLuv.
+ *
+ * @param r Red component. Between 0.0 and 1.0.
+ * @param g Green component. Between 0.0 and 1.0.
+ * @param b Blue component. Between 0.0 and 1.0.
+ * @param[out] ph Hue. Between 0.0 and 360.0.
+ * @param[out] ps Saturation. Between 0.0 and 100.0.
+ * @param[out] pl Lightness. Between 0.0 and 100.0.
+ */
+void rgb2hsluv(double r, double g, double b, double* ph, double* ps, double* pl);
+
+/**
+ * Convert HPLuv to RGB.
+ *
+ * @param h Hue. Between 0.0 and 360.0.
+ * @param s Saturation. Between 0.0 and 100.0.
+ * @param l Lightness. Between 0.0 and 100.0.
+ * @param[out] pr Red component. Between 0.0 and 1.0.
+ * @param[out] pg Green component. Between 0.0 and 1.0.
+ * @param[out] pb Blue component. Between 0.0 and 1.0.
+ */
+void hpluv2rgb(double h, double s, double l, double* pr, double* pg, double* pb);
+
+/**
+ * Convert RGB to HPLuv.
+ *
+ * @param r Red component. Between 0.0 and 1.0.
+ * @param g Green component. Between 0.0 and 1.0.
+ * @param b Blue component. Between 0.0 and 1.0.
+ * @param[out] ph Hue. Between 0.0 and 360.0.
+ * @param[out] ps Saturation. Between 0.0 and 100.0.
+ * @param[out] pl Lightness. Between 0.0 and 100.0.
+ *
+ * Note that HPLuv does not contain all the colors of RGB, so converting
+ * arbitrary RGB to it may generate invalid HPLuv colors.
+ */
+void rgb2hpluv(double r, double g, double b, double* ph, double* ps, double* pl);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* HSLUV_H */