1/*
2 * Mesa 3-D graphics library
3 * Version:  7.3
4 *
5 * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR 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 */
44static inline void
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 * \todo We may move these into texstore.h at some point.
57 */
58/*@{*/
59
60#define PACK_COLOR_8888( X, Y, Z, W ) \
61   (((X) << 24) | ((Y) << 16) | ((Z) << 8) | (W))
62
63#define PACK_COLOR_8888_REV( X, Y, Z, W ) \
64   (((W) << 24) | ((Z) << 16) | ((Y) << 8) | (X))
65
66#define PACK_COLOR_888( X, Y, Z ) \
67   (((X) << 16) | ((Y) << 8) | (Z))
68
69#define PACK_COLOR_565( X, Y, Z )                                  \
70   ((((X) & 0xf8) << 8) | (((Y) & 0xfc) << 3) | (((Z) & 0xf8) >> 3))
71
72#define PACK_COLOR_565_REV( X, Y, Z ) \
73   (((X) & 0xf8) | ((Y) & 0xe0) >> 5 | (((Y) & 0x1c) << 11) | (((Z) & 0xf8) << 5))
74
75#define PACK_COLOR_5551( R, G, B, A )					\
76   ((((R) & 0xf8) << 8) | (((G) & 0xf8) << 3) | (((B) & 0xf8) >> 2) |	\
77    ((A) >> 7))
78
79#define PACK_COLOR_1555( A, B, G, R )					\
80   ((((B) & 0xf8) << 7) | (((G) & 0xf8) << 2) | (((R) & 0xf8) >> 3) |	\
81    (((A) & 0x80) << 8))
82
83#define PACK_COLOR_1555_REV( A, B, G, R )					\
84   ((((B) & 0xf8) >> 1) | (((G) & 0xc0) >> 6) | (((G) & 0x38) << 10) | (((R) & 0xf8) << 5) |	\
85    ((A) ? 0x80 : 0))
86
87#define PACK_COLOR_2101010_UB( A, B, G, R )					\
88   (((B) << 22) | ((G) << 12) | ((R) << 2) |	\
89    (((A) & 0xc0) << 24))
90
91#define PACK_COLOR_2101010_US( A, B, G, R )					\
92   ((((B) >> 6) << 20) | (((G) >> 6) << 10) | ((R) >> 6) |	\
93    (((A) >> 14) << 30))
94
95#define PACK_COLOR_4444( R, G, B, A )					\
96   ((((R) & 0xf0) << 8) | (((G) & 0xf0) << 4) | ((B) & 0xf0) | ((A) >> 4))
97
98#define PACK_COLOR_4444_REV( R, G, B, A )				\
99   ((((B) & 0xf0) << 8) | (((A) & 0xf0) << 4) | ((R) & 0xf0) | ((G) >> 4))
100
101#define PACK_COLOR_44( L, A )						\
102   (((L) & 0xf0) | (((A) & 0xf0) >> 4))
103
104#define PACK_COLOR_88( L, A )						\
105   (((L) << 8) | (A))
106
107#define PACK_COLOR_88_REV( L, A )					\
108   (((A) << 8) | (L))
109
110#define PACK_COLOR_1616( L, A )						\
111   (((L) << 16) | (A))
112
113#define PACK_COLOR_1616_REV( L, A )					\
114   (((A) << 16) | (L))
115
116#define PACK_COLOR_332( R, G, B )					\
117   (((R) & 0xe0) | (((G) & 0xe0) >> 3) | (((B) & 0xc0) >> 6))
118
119#define PACK_COLOR_233( B, G, R )					\
120   (((B) & 0xc0) | (((G) & 0xe0) >> 2) | (((R) & 0xe0) >> 5))
121
122/*@}*/
123
124
125#endif /* COLORMAC_H */
126