src/freetype/freetype/internal/ftcalc.h

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftcalc.h                                                               */
   4 /*                                                                         */
   5 /*    Arithmetic computations (specification).                             */
   6 /*                                                                         */
   7 /*  Copyright 1996-2000 by                                                 */
   8 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
   9 /*                                                                         */
  10 /*  This file is part of the FreeType project, and may only be used,       */
  11 /*  modified, and distributed under the terms of the FreeType project      */
  12 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  13 /*  this file you indicate that you have read the license and              */
  14 /*  understand and accept it fully.                                        */
  15 /*                                                                         */
  16 /***************************************************************************/
  17
  18
  19 #ifndef FTCALC_H
  20 #define FTCALC_H
  21
  22 #include <freetype/freetype.h>
  23 #include <freetype/config/ftconfig.h>   /* for LONG64 */
  24
  25 #ifdef __cplusplus
  26   extern "C" {
  27 #endif
  28
  29
  30 #ifdef LONG64
  31
  32
  33   typedef INT64  FT_Int64;
  34
  35 #define ADD_64( x, y, z )  z = (x) + (y)
  36 #define MUL_64( x, y, z )  z = (FT_Int64)(x) * (y)
  37
  38 #define DIV_64( x, y )     ( (x) / (y) )
  39
  40
  41 #ifdef FT_CONFIG_OPTION_OLD_CALCS
  42
  43 #define SQRT_64( z )  FT_Sqrt64( z )
  44
  45   FT_EXPORT_DEF( FT_Int32 )  FT_Sqrt64( FT_Int64  l );
  46
  47 #endif /* FT_CONFIG_OPTION_OLD_CALCS */
  48
  49
  50 #else /* LONG64 */
  51
  52
  53   typedef struct  FT_Int64_
  54   {
  55     FT_UInt32  lo;
  56     FT_UInt32  hi;
  57
  58   } FT_Int64;
  59
  60
  61 #define ADD_64( x, y, z )  FT_Add64( &x, &y, &z )
  62 #define MUL_64( x, y, z )  FT_MulTo64( x, y, &z )
  63 #define DIV_64( x, y )     FT_Div64by32( &x, y )
  64
  65
  66   FT_EXPORT_DEF( void )  FT_Add64( FT_Int64*  x,
  67                                    FT_Int64*  y,
  68                                    FT_Int64*  z );
  69
  70   FT_EXPORT_DEF( void )  FT_MulTo64( FT_Int32   x,
  71                                      FT_Int32   y,
  72                                      FT_Int64*  z );
  73
  74   FT_EXPORT_DEF( FT_Int32 )  FT_Div64by32( FT_Int64*  x,
  75                                            FT_Int32   y );
  76
  77
  78 #ifdef FT_CONFIG_OPTION_OLD_CALCS
  79
  80 #define SQRT_64( z )  FT_Sqrt64( &z )
  81
  82   FT_EXPORT_DEF( FT_Int32 )  FT_Sqrt64( FT_Int64*  x );
  83
  84 #endif /* FT_CONFIG_OPTION_OLD_CALCS */
  85
  86
  87 #endif /* LONG64 */
  88
  89
  90 #ifndef FT_CONFIG_OPTION_OLD_CALCS
  91
  92 #define SQRT_32( x )  FT_Sqrt32( x )
  93
  94   BASE_DEF( FT_Int32 )  FT_Sqrt32( FT_Int32  x );
  95
  96 #endif /* !FT_CONFIG_OPTION_OLD_CALCS */
  97
  98
  99   /*************************************************************************/
 100   /*                                                                       */
 101   /* FT_MulDiv() and FT_MulFix() are declared in freetype.h.               */
 102   /*                                                                       */
 103   /*************************************************************************/
 104
 105
 106 #define INT_TO_F26DOT6( x )    ( (FT_Long)(x) << 6  )
 107 #define INT_TO_F2DOT14( x )    ( (FT_Long)(x) << 14 )
 108 #define INT_TO_FIXED( x )      ( (FT_Long)(x) << 16 )
 109 #define F2DOT14_TO_FIXED( x )  ( (FT_Long)(x) << 2  )
 110 #define FLOAT_TO_FIXED( x )    ( (FT_Long)( x * 65536.0 ) )
 111
 112 #define ROUND_F26DOT6( x )     ( x >= 0 ? (    ( (x) + 32 ) & -64 )     \
 113                                         : ( -( ( 32 - (x) ) & -64 ) ) )
 114
 115
 116 #ifdef __cplusplus
 117   }
 118 #endif
 119
 120 #endif /* FTCALC_H */
 121
 122
 123 /* END */