modules/freetype2/src/cff/cf2fixed.h
author Ryan VanderMeulen <ryanvm@gmail.com>
Sat, 21 Jan 2017 08:53:00 -0500
changeset 377863 68c5a5f718bd97074427e1e89387da3ab95e0acf
parent 372128 24af599c0e9b4f438cf728355af25547cc33b2d1
child 433327 c4f1d0d1852b6e61c7a3e78ec8c0e33879c20d95
permissions -rw-r--r--
Bug 1328971 - Update Freetype to version 2.7.1. r=jfkthame

/***************************************************************************/
/*                                                                         */
/*  cf2fixed.h                                                             */
/*                                                                         */
/*    Adobe's code for Fixed Point Mathematics (specification only).       */
/*                                                                         */
/*  Copyright 2007-2013 Adobe Systems Incorporated.                        */
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/***************************************************************************/


#ifndef CF2FIXED_H_
#define CF2FIXED_H_


FT_BEGIN_HEADER


  /* rasterizer integer and fixed point arithmetic must be 32-bit */

#define   CF2_Fixed  CF2_F16Dot16
  typedef FT_Int32   CF2_Frac;   /* 2.30 fixed point */


#define CF2_FIXED_MAX      ( (CF2_Fixed)0x7FFFFFFFL )
#define CF2_FIXED_MIN      ( (CF2_Fixed)0x80000000L )
#define CF2_FIXED_ONE      ( (CF2_Fixed)0x10000L )
#define CF2_FIXED_EPSILON  ( (CF2_Fixed)0x0001 )

  /* in C 89, left and right shift of negative numbers is  */
  /* implementation specific behaviour in the general case */

#define cf2_intToFixed( i )                                              \
          ( (CF2_Fixed)( (FT_UInt32)(i) << 16 ) )
#define cf2_fixedToInt( x )                                              \
          ( (FT_Short)( ( (FT_UInt32)(x) + 0x8000U ) >> 16 ) )
#define cf2_fixedRound( x )                                              \
          ( (CF2_Fixed)( ( (FT_UInt32)(x) + 0x8000U ) & 0xFFFF0000UL ) )
#define cf2_floatToFixed( f )                                            \
          ( (CF2_Fixed)( (f) * 65536.0 + 0.5 ) )
#define cf2_fixedAbs( x )                                                \
          ( (x) < 0 ? -(x) : (x) )
#define cf2_fixedFloor( x )                                              \
          ( (CF2_Fixed)( (FT_UInt32)(x) & 0xFFFF0000UL ) )
#define cf2_fixedFraction( x )                                           \
          ( (x) - cf2_fixedFloor( x ) )
#define cf2_fracToFixed( x )                                             \
          ( (x) < 0 ? -( ( -(x) + 0x2000 ) >> 14 )                       \
                    :  ( (  (x) + 0x2000 ) >> 14 ) )


  /* signed numeric types */
  typedef enum  CF2_NumberType_
  {
    CF2_NumberFixed,    /* 16.16 */
    CF2_NumberFrac,     /*  2.30 */
    CF2_NumberInt       /* 32.0  */

  } CF2_NumberType;


FT_END_HEADER


#endif /* CF2FIXED_H_ */


/* END */