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annotate src/color.h @ 32:91bc2329ab0c

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core: implement data directory access, closes #2454 @1h
author David Demelier <markand@malikania.fr>
date Mon, 13 Jan 2020 13:28:53 +0100
parents 8f6a1ffb1ebe
children
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1 /*
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2 * color.h -- basic color routines
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3 *
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #ifndef MOLKO_COLOR_H
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20 #define MOLKO_COLOR_H
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21
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22 /**
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23 * \file color.h
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24 * \brief Basic color routines.
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25 */
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26
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27 /**
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28 * Get red component of hexadecimal color.
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29 *
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30 * \param c the hexadecimal color
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31 * \return the red component
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32 */
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33 #define COLOR_R(c) (c >> 24 & 0xff)
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34
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35 /**
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36 * Get green component of hexadecimal color.
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37 *
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38 * \param c the hexadecimal color
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39 * \return the green component
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40 */
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41 #define COLOR_G(c) (c >> 16 & 0xff)
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42
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43 /**
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44 * Get blue component of hexadecimal color.
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45 *
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46 * \param c the hexadecimal color
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47 * \return the blue component
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48 */
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49 #define COLOR_B(c) (c >> 8 & 0xff)
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50
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51 /**
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52 * Get alpha component of hexadecimal color.
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53 *
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54 * \param c the hexadecimal color
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55 * \return the alpha component
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56 */
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57 #define COLOR_A(c) (c & 0xff)
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58
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59 /**
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60 * Convert individual RGBA components into a hexadecimal color.
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61 *
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62 * \param r the red component
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63 * \param g the green component
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64 * \param b the blue component
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65 * \param a the alpha component
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66 * \return the hexadecimal color
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67 */
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68 #define COLOR_HEX(r, g, b, a) \
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69 ((r << 24 & 0xff000000) | \
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70 (g << 16 & 0x00ff0000) | \
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71 (b << 8 & 0x0000ff00) | \
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72 (a & 0x000000ff))
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73
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74 #endif /* !MOLKO_COLOR_H */