--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/color.h	Tue Jan 07 20:41:11 2020 +0100
@@ -0,0 +1,74 @@
+/*
+ * color.h -- basic color routines
+ *
+ * Copyright (c) 2020 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef MOLKO_COLOR_H
+#define MOLKO_COLOR_H
+
+/**
+ * \file color.h
+ * \brief Basic color routines.
+ */
+
+/**
+ * Get red component of hexadecimal color.
+ *
+ * \param c the hexadecimal color
+ * \return the red component
+ */
+#define COLOR_R(c)              (c >> 24 & 0xff)
+
+/**
+ * Get green component of hexadecimal color.
+ *
+ * \param c the hexadecimal color
+ * \return the green component
+ */
+#define COLOR_G(c)              (c >> 16 & 0xff)
+
+/**
+ * Get blue component of hexadecimal color.
+ *
+ * \param c the hexadecimal color
+ * \return the blue component
+ */
+#define COLOR_B(c)              (c >> 8  & 0xff)
+
+/**
+ * Get alpha component of hexadecimal color.
+ *
+ * \param c the hexadecimal color
+ * \return the alpha component
+ */
+#define COLOR_A(c)              (c       & 0xff)
+
+/**
+ * Convert individual RGBA components into a hexadecimal color.
+ *
+ * \param r the red component
+ * \param g the green component
+ * \param b the blue component
+ * \param a the alpha component
+ * \return the hexadecimal color
+ */
+#define COLOR_HEX(r, g, b, a)   \
+        (r << 24 & 0xff000000 | \
+         g << 16 & 0x00ff0000 | \
+         b << 8  & 0x0000ff00 | \
+         a       & 0x000000ff)
+
+#endif /* !MOLKO_COLOR_H */