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4325cdcc78
Resource forks are included only for .rsrc files. These are DeRezzed into their data fork. 'ckid' resources, from the Projector VCS, are not included. The Tools directory, containing mostly junk, is also excluded.
65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/*
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File: FontMath.h
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Contains: xxx put contents here xxx
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Written by: xxx put writers here xxx
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Copyright: © 1990 by Apple Computer, Inc., all rights reserved.
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Change History (most recent first):
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<4> 11/27/90 MR make pascal declaration a macro, conditionalize traps -vs-
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externs for Fix/Frac math routines. [ph]
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<3> 11/5/90 MR Move [U]SHORTMUL into FSCdefs.h Rename FixMulDiv to LongMulDiv.
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[rb]
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<2> 10/20/90 MR Add some new math routines (stolen from skia). [rj]
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<1> 4/11/90 dba first checked in
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To Do:
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*/
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#define HIBITSET 0x80000000
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#define POSINFINITY 0x7FFFFFFF
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#define NEGINFINITY 0x80000000
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#define HIWORDMASK 0xffff0000
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#define LOWORDMASK 0x0000ffff
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#define FIXONEHALF 0x00008000
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#define ONESHORTFRAC (1 << 14)
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#define FIXROUND( x ) (int16)(((x) + FIXONEHALF) >> 16)
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#define ROUNDFIXED( x ) (((x) + FIXONEHALF) & HIWORDMASK)
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#define DOT6TOFIX(n) ((n) << 10)
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#define HIWORD(n) ((uint16)((uint32)(n) >> 16))
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#define LOWORD(n) ((uint16)(n))
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#define LOWSIXBITS 63
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typedef short ShortFrac; /* 2.14 */
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#ifdef NOT_ON_THE_MAC
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PASCAL Fixed FixRatio(short numer,short denom);
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PASCAL Fixed FixMul(Fixed a,Fixed b);
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PASCAL Fixed FixDiv(Fixed x,Fixed y);
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PASCAL Fract FracMul(Fract x,Fract y);
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PASCAL Fract FracDiv(Fract x,Fract y);
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PASCAL Fract FracSqrt(Fract x);
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#else
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#ifndef __TOOLUTILS__
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PASCAL Fixed FixRatio(short numer,short denom) = 0xA869;
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PASCAL Fixed FixMul(Fixed a,Fixed b) = 0xA868;
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#endif
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#ifndef __FIXMATH__
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PASCAL Fixed FixDiv(Fixed x,Fixed y) = 0xA84D;
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PASCAL Fract FracMul(Fract x,Fract y) = 0xA84A;
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PASCAL Fract FracDiv(Fract x,Fract y) = 0xA84B;
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PASCAL Fract FracSqrt(Fract x) = 0xA849;
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#endif
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#endif
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long LongMulDiv(long a, long b, long c); /* (a*b)/c */
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long ShortFracMul(long a, ShortFrac b);
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ShortFrac ShortFracDot(ShortFrac a, ShortFrac b);
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int32 ShortMulDiv(int32 a, int16 b, int16 c); /* (a*b)/c */
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F26Dot6 Mul26Dot6(F26Dot6 a, F26Dot6 b);
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F26Dot6 Div26Dot6(F26Dot6 a, F26Dot6 b);
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