1/***************************************************************************/
2/*                                                                         */
3/*  cf2fixed.h                                                             */
4/*                                                                         */
5/*    Adobe's code for Fixed Point Mathematics (specification only).       */
6/*                                                                         */
7/*  Copyright 2007-2013 Adobe Systems Incorporated.                        */
8/*                                                                         */
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35/*                                                                         */
36/***************************************************************************/
37
38
39#ifndef __CF2FIXED_H__
40#define __CF2FIXED_H__
41
42
43FT_BEGIN_HEADER
44
45
46  /* rasterizer integer and fixed point arithmetic must be 32-bit */
47
48#define   CF2_Fixed  CF2_F16Dot16
49  typedef FT_Int32   CF2_Frac;   /* 2.30 fixed point */
50
51
52#define CF2_FIXED_MAX      ( (CF2_Fixed)0x7FFFFFFFL )
53#define CF2_FIXED_MIN      ( (CF2_Fixed)0x80000000L )
54#define CF2_FIXED_ONE      0x10000L
55#define CF2_FIXED_EPSILON  0x0001
56
57  /* in C 89, left and right shift of negative numbers is  */
58  /* implementation specific behaviour in the general case */
59
60#define cf2_intToFixed( i )                                    \
61          ( (CF2_Fixed)( (FT_UInt32)(i) << 16 ) )
62#define cf2_fixedToInt( x )                                    \
63          ( (FT_Short)( ( (FT_UInt32)(x) + 0x8000U ) >> 16 ) )
64#define cf2_fixedRound( x )                                    \
65          ( (CF2_Fixed)( ( (x) + 0x8000 ) & 0xFFFF0000L ) )
66#define cf2_floatToFixed( f )                                  \
67          ( (CF2_Fixed)( (f) * 65536.0 + 0.5 ) )
68#define cf2_fixedAbs( x )                                      \
69          ( (x) < 0 ? -(x) : (x) )
70#define cf2_fixedFloor( x )                                    \
71          ( (CF2_Fixed)( (x) & 0xFFFF0000L ) )
72#define cf2_fixedFraction( x )                                 \
73          ( (x) - cf2_fixedFloor( x ) )
74#define cf2_fracToFixed( x )                                   \
75          ( (x) < 0 ? -( ( -(x) + 0x2000 ) >> 14 )             \
76                    :  ( (  (x) + 0x2000 ) >> 14 ) )
77
78
79  /* signed numeric types */
80  typedef enum  CF2_NumberType_
81  {
82    CF2_NumberFixed,    /* 16.16 */
83    CF2_NumberFrac,     /*  2.30 */
84    CF2_NumberInt       /* 32.0  */
85
86  } CF2_NumberType;
87
88
89FT_END_HEADER
90
91
92#endif /*  __CF2FIXED_H__ */
93
94
95/* END */
96