1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26 /**
27 * \file colormac.h
28 * Color-related macros
29 */
30
31
32 #ifndef COLORMAC_H
33 #define COLORMAC_H
34
35
36 #include "config.h"
37 #include "macros.h"
38 #include "mtypes.h"
39
40
41 /**
42 * Convert four float values in [0,1] to ubytes in [0,255] with clamping.
43 */
44 static inline void
_mesa_unclamped_float_rgba_to_ubyte(GLubyte dst[4],const GLfloat src[4])45 _mesa_unclamped_float_rgba_to_ubyte(GLubyte dst[4], const GLfloat src[4])
46 {
47 int i;
48 for (i = 0; i < 4; i++)
49 UNCLAMPED_FLOAT_TO_UBYTE(dst[i], src[i]);
50 }
51
52
53 /**
54 * \name Generic color packing macros. All inputs should be GLubytes.
55 */
56 /*@{*/
57
58 #define PACK_COLOR_8888( X, Y, Z, W ) \
59 (((X) << 24) | ((Y) << 16) | ((Z) << 8) | (W))
60
61 #define PACK_COLOR_565( X, Y, Z ) \
62 ((((X) & 0xf8) << 8) | (((Y) & 0xfc) << 3) | (((Z) & 0xf8) >> 3))
63
64 #define PACK_COLOR_1555( A, B, G, R ) \
65 ((((B) & 0xf8) << 7) | (((G) & 0xf8) << 2) | (((R) & 0xf8) >> 3) | \
66 (((A) & 0x80) << 8))
67
68 #define PACK_COLOR_4444( R, G, B, A ) \
69 ((((R) & 0xf0) << 8) | (((G) & 0xf0) << 4) | ((B) & 0xf0) | ((A) >> 4))
70
71 #define PACK_COLOR_88( L, A ) \
72 (((L) << 8) | (A))
73
74 /*@}*/
75
76
77 #endif /* COLORMAC_H */
78