1 /***************************************************************************/
5 /* Adobe's code for Fixed Point Mathematics (specification only). */
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36 /***************************************************************************/
39 #ifndef __CF2FIXED_H__
40 #define __CF2FIXED_H__
46 /* rasterizer integer and fixed point arithmetic must be 32-bit */
48 #define CF2_Fixed CF2_F16Dot16
49 typedef FT_Int32 CF2_Frac; /* 2.30 fixed point */
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
57 /* in C 89, left and right shift of negative numbers is */
58 /* implementation specific behaviour in the general case */
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 ) )
79 /* signed numeric types */
80 typedef enum CF2_NumberType_
82 CF2_NumberFixed, /* 16.16 */
83 CF2_NumberFrac, /* 2.30 */
84 CF2_NumberInt /* 32.0 */
92 #endif /* __CF2FIXED_H__ */