modules/freetype2/src/raster/ftmisc.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftmisc.h                                                               */
   4 /*                                                                         */
   5 /*    Miscellaneous macros for stand-alone rasterizer (specification       */
   6 /*    only).                                                               */
   7 /*                                                                         */
   8 /*  Copyright 2005 by                                                      */
   9 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
  10 /*                                                                         */
  11 /*  This file is part of the FreeType project, and may only be used        */
  12 /*  modified and distributed under the terms of the FreeType project       */
  13 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  14 /*  this file you indicate that you have read the license and              */
  15 /*  understand and accept it fully.                                        */
  16 /*                                                                         */
  17 /***************************************************************************/
  18
  19
  20   /***************************************************/
  21   /*                                                 */
  22   /* This file is *not* portable!  You have to adapt */
  23   /* its definitions to your platform.               */
  24   /*                                                 */
  25   /***************************************************/
  26
  27 #ifndef __FTMISC_H__
  28 #define __FTMISC_H__
  29
  30 #include <string.h> /* memset */
  31
  32 #define FT_BEGIN_HEADER
  33 #define FT_END_HEADER
  34
  35 #define FT_LOCAL_DEF( x )   static x
  36
  37   /* from include/freetype2/fttypes.h */
  38
  39   typedef unsigned char  FT_Byte;
  40   typedef signed int     FT_Int;
  41   typedef unsigned int   FT_UInt;
  42   typedef signed long    FT_Long;
  43   typedef unsigned long  FT_ULong;
  44   typedef signed long    FT_F26Dot6;
  45   typedef int            FT_Error;
  46
  47 #define FT_MAKE_TAG( _x1, _x2, _x3, _x4 ) \
  48           ( ( (FT_ULong)_x1 << 24 ) |     \
  49             ( (FT_ULong)_x2 << 16 ) |     \
  50             ( (FT_ULong)_x3 <<  8 ) |     \
  51               (FT_ULong)_x4         )
  52
  53
  54   /* from src/ftcalc.c */
  55
  56 #include <inttypes.h>
  57
  58   typedef int64_t  FT_Int64;
  59
  60   static FT_Long
  61   FT_MulDiv( FT_Long  a,
  62              FT_Long  b,
  63              FT_Long  c )
  64   {
  65     FT_Int   s;
  66     FT_Long  d;
  67
  68
  69     s = 1;
  70     if ( a < 0 ) { a = -a; s = -1; }
  71     if ( b < 0 ) { b = -b; s = -s; }
  72     if ( c < 0 ) { c = -c; s = -s; }
  73
  74     d = (FT_Long)( c > 0 ? ( (FT_Int64)a * b + ( c >> 1 ) ) / c
  75                          : 0x7FFFFFFFL );
  76
  77     return ( s > 0 ) ? d : -d;
  78   }
  79
  80 #endif /* __FTMISC_H__ */
  81
  82
  83 /* END */