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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