src/mesa/main/colormac.h

   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  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 /**
  28  * \file colormac.h
  29  * Color-related macros
  30  */
  31
  32
  33 #ifndef COLORMAC_H
  34 #define COLORMAC_H
  35
  36
  37 #include "config.h"
  38 #include "macros.h"
  39 #include "mtypes.h"
  40
  41
  42 /**
  43  * Convert four float values in [0,1] to ubytes in [0,255] with clamping.
  44  */
  45 static inline void
  46 _mesa_unclamped_float_rgba_to_ubyte(GLubyte dst[4], const GLfloat src[4])
  47 {
  48    int i;
  49    for (i = 0; i < 4; i++)
  50       UNCLAMPED_FLOAT_TO_UBYTE(dst[i], src[i]);
  51 }
  52
  53
  54 /**
  55  * \name Generic color packing macros.  All inputs should be GLubytes.
  56  *
  57  * \todo We may move these into texstore.h at some point.
  58  */
  59 /*@{*/
  60
  61 #define PACK_COLOR_8888( X, Y, Z, W ) \
  62    (((X) << 24) | ((Y) << 16) | ((Z) << 8) | (W))
  63
  64 #define PACK_COLOR_8888_REV( X, Y, Z, W ) \
  65    (((W) << 24) | ((Z) << 16) | ((Y) << 8) | (X))
  66
  67 #define PACK_COLOR_888( X, Y, Z ) \
  68    (((X) << 16) | ((Y) << 8) | (Z))
  69
  70 #define PACK_COLOR_565( X, Y, Z )                                  \
  71    ((((X) & 0xf8) << 8) | (((Y) & 0xfc) << 3) | (((Z) & 0xf8) >> 3))
  72
  73 #define PACK_COLOR_565_REV( X, Y, Z ) \
  74    (((X) & 0xf8) | ((Y) & 0xe0) >> 5 | (((Y) & 0x1c) << 11) | (((Z) & 0xf8) << 5))
  75
  76 #define PACK_COLOR_5551( R, G, B, A )                                   \
  77    ((((R) & 0xf8) << 8) | (((G) & 0xf8) << 3) | (((B) & 0xf8) >> 2) |   \
  78     ((A) >> 7))
  79
  80 #define PACK_COLOR_1555( A, B, G, R )                                   \
  81    ((((B) & 0xf8) << 7) | (((G) & 0xf8) << 2) | (((R) & 0xf8) >> 3) |   \
  82     (((A) & 0x80) << 8))
  83
  84 #define PACK_COLOR_1555_REV( A, B, G, R )                                       \
  85    ((((B) & 0xf8) >> 1) | (((G) & 0xc0) >> 6) | (((G) & 0x38) << 10) | (((R) & 0xf8) << 5) |    \
  86     ((A) ? 0x80 : 0))
  87
  88 #define PACK_COLOR_2101010_UB( A, B, G, R )                                     \
  89    (((B) << 22) | ((G) << 12) | ((R) << 2) |    \
  90     (((A) & 0xc0) << 24))
  91
  92 #define PACK_COLOR_2101010_US( A, B, G, R )                                     \
  93    ((((B) >> 6) << 20) | (((G) >> 6) << 10) | ((R) >> 6) |      \
  94     (((A) >> 14) << 30))
  95
  96 #define PACK_COLOR_4444( R, G, B, A )                                   \
  97    ((((R) & 0xf0) << 8) | (((G) & 0xf0) << 4) | ((B) & 0xf0) | ((A) >> 4))
  98
  99 #define PACK_COLOR_4444_REV( R, G, B, A )                               \
 100    ((((B) & 0xf0) << 8) | (((A) & 0xf0) << 4) | ((R) & 0xf0) | ((G) >> 4))
 101
 102 #define PACK_COLOR_44( L, A )                                           \
 103    (((L) & 0xf0) | (((A) & 0xf0) >> 4))
 104
 105 #define PACK_COLOR_88( L, A )                                           \
 106    (((L) << 8) | (A))
 107
 108 #define PACK_COLOR_88_REV( L, A )                                       \
 109    (((A) << 8) | (L))
 110
 111 #define PACK_COLOR_1616( L, A )                                         \
 112    (((L) << 16) | (A))
 113
 114 #define PACK_COLOR_1616_REV( L, A )                                     \
 115    (((A) << 16) | (L))
 116
 117 #define PACK_COLOR_332( R, G, B )                                       \
 118    (((R) & 0xe0) | (((G) & 0xe0) >> 3) | (((B) & 0xc0) >> 6))
 119
 120 #define PACK_COLOR_233( B, G, R )                                       \
 121    (((B) & 0xc0) | (((G) & 0xe0) >> 2) | (((R) & 0xe0) >> 5))
 122
 123 /*@}*/
 124
 125
 126 #endif /* COLORMAC_H */