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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
  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.