AuroraMiddleware/freetype
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fixed a stupid bug in FT_MulFix

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This commit is contained in:
David Turner 2000-03-28 11:17:58 +00:00
parent b5c1a4e567
commit e01a41d5eb
1 changed files with 9 additions and 6 deletions
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15
src/base/ftcalc.c
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@ -325,7 +325,7 @@
FT_Long b )
{
FT_Long s;
FT_ULong ua, ub;
if ( a == 0 || b == 0x10000L )
return a;
@ -333,19 +333,22 @@
s = a; a = ABS(a);
s ^= b; b = ABS(b);
if ( a <= 2048 && b <= 1048576L )
ua = (FT_ULong)a;
ub = (FT_ULong)b;
if ( ua <= 2048 && ub <= 1048576L )
{
a = ( a*b + 0x8000 ) >> 16;
ua = ( ua*ub + 0x8000 ) >> 16;
}
else
{
FT_Long al = a & 0xFFFF;
FT_ULong al = ua & 0xFFFF;
a = (a >> 16)*b + al*(b >> 16) + ( al*(b & 0xFFFF) >> 16 );
ua = (ua >> 16)*ub + al*(ub >> 16) + ( al*(ub & 0xFFFF) >> 16 );
}
return ( s < 0 ? -a : a );
return ( s < 0 ? -(FT_Long)ua : ua );
}