psfixed.h

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/****************************************************************************
 *
 * psfixed.h
 *
 *   Adobe's code for Fixed-Point Mathematics (specification only).
 *
 * Copyright 2007-2013 Adobe Systems Incorporated.
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#ifndef PSFIXED_H_
#define PSFIXED_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_doubleToFixed( f )                                           \
          ( (CF2_Fixed)( (f) * 65536.0 + 0.5 ) )
#define cf2_fixedAbs( x )                                                \
          ( (x) < 0 ? NEG_INT32( 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) + 0x2000 - ( (x) < 0 ) ) >> 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 /* PSFIXED_H_ */
 
 
/* END */