src/mesa/main/colormac.h

   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
  39
  40 /**
  41  * Convert four float values in [0,1] to ubytes in [0,255] with clamping.
  42  */
  43 static inline void
  44 _mesa_unclamped_float_rgba_to_ubyte(GLubyte dst[4], const GLfloat src[4])
  45 {
  46    int i;
  47    for (i = 0; i < 4; i++)
  48       UNCLAMPED_FLOAT_TO_UBYTE(dst[i], src[i]);
  49 }
  50
  51
  52 /**
  53  * \name Generic color packing macros.  All inputs should be GLubytes.
  54  */
  55 /*@{*/
  56
  57 #define PACK_COLOR_8888( X, Y, Z, W ) \
  58    (((X) << 24) | ((Y) << 16) | ((Z) << 8) | (W))
  59
  60 #define PACK_COLOR_565( X, Y, Z )                                  \
  61    ((((X) & 0xf8) << 8) | (((Y) & 0xfc) << 3) | (((Z) & 0xf8) >> 3))
  62
  63 #define PACK_COLOR_1555( A, B, G, R )                                   \
  64    ((((B) & 0xf8) << 7) | (((G) & 0xf8) << 2) | (((R) & 0xf8) >> 3) |   \
  65     (((A) & 0x80) << 8))
  66
  67 #define PACK_COLOR_4444( R, G, B, A )                                   \
  68    ((((R) & 0xf0) << 8) | (((G) & 0xf0) << 4) | ((B) & 0xf0) | ((A) >> 4))
  69
  70 #define PACK_COLOR_88( L, A )                                           \
  71    (((L) << 8) | (A))
  72
  73 /*@}*/
  74
  75
  76 #endif /* COLORMAC_H */