X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=libraries%2Ffreetype-2.0.5%2Fftcalc.c;fp=libraries%2Ffreetype-2.0.5%2Fftcalc.c;h=0000000000000000000000000000000000000000;hp=247ee034ca59396fac18f7bab7525b74a25c477e;hb=bab0189ee9d56aca8bea909275317ab4e0be09ee;hpb=b837c0527f117b54845242ee7626df6d88394444 diff --git a/libraries/freetype-2.0.5/ftcalc.c b/libraries/freetype-2.0.5/ftcalc.c deleted file mode 100644 index 247ee03..0000000 --- a/libraries/freetype-2.0.5/ftcalc.c +++ /dev/null @@ -1,649 +0,0 @@ -/***************************************************************************/ -/* */ -/* ftcalc.c */ -/* */ -/* Arithmetic computations (body). */ -/* */ -/* Copyright 1996-2001 by */ -/* David Turner, Robert Wilhelm, and Werner Lemberg. */ -/* */ -/* This file is part of the FreeType project, and may only be used, */ -/* modified, and distributed under the terms of the FreeType project */ -/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ -/* this file you indicate that you have read the license and */ -/* understand and accept it fully. */ -/* */ -/***************************************************************************/ - - /*************************************************************************/ - /* */ - /* Support for 1-complement arithmetic has been totally dropped in this */ - /* release. You can still write your own code if you need it. */ - /* */ - /*************************************************************************/ - - /*************************************************************************/ - /* */ - /* Implementing basic computation routines. */ - /* */ - /* FT_MulDiv(), FT_MulFix(), FT_DivFix(), FT_RoundFix(), FT_CeilFix(), */ - /* and FT_FloorFix() are declared in freetype.h. */ - /* */ - /*************************************************************************/ - - -#include -#include FT_INTERNAL_CALC_H -#include FT_INTERNAL_DEBUG_H -#include FT_INTERNAL_OBJECTS_H - - -/* we need to define a 64-bits data type here */ -#ifndef FT_CONFIG_OPTION_OLD_CALCS - -#ifdef FT_LONG64 - - typedef FT_INT64 FT_Int64; - -#else - - typedef struct FT_Int64_ - { - FT_UInt32 lo; - FT_UInt32 hi; - - } FT_Int64; - -#endif /* FT_LONG64 */ - -#endif /* !FT_CONFIG_OPTION_OLD_CALCS */ - - - /*************************************************************************/ - /* */ - /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ - /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ - /* messages during execution. */ - /* */ -#undef FT_COMPONENT -#define FT_COMPONENT trace_calc - - - /* The following three functions are available regardless of whether */ - /* FT_LONG64 or FT_CONFIG_OPTION_OLD_CALCS is defined. */ - - /* documentation is in freetype.h */ - - FT_EXPORT_DEF( FT_Fixed ) - FT_RoundFix( FT_Fixed a ) - { - return ( a >= 0 ) ? ( a + 0x8000L ) & -0x10000L - : -((-a + 0x8000L ) & -0x10000L ); - } - - - /* documentation is in freetype.h */ - - FT_EXPORT_DEF( FT_Fixed ) - FT_CeilFix( FT_Fixed a ) - { - return ( a >= 0 ) ? ( a + 0xFFFFL ) & -0x10000L - : -((-a + 0xFFFFL ) & -0x10000L ); - } - - - /* documentation is in freetype.h */ - - FT_EXPORT_DEF( FT_Fixed ) - FT_FloorFix( FT_Fixed a ) - { - return ( a >= 0 ) ? a & -0x10000L - : -((-a) & -0x10000L ); - } - - -#ifdef FT_CONFIG_OPTION_OLD_CALCS - - static const FT_Long ft_square_roots[63] = - { - 1L, 1L, 2L, 3L, 4L, 5L, 8L, 11L, - 16L, 22L, 32L, 45L, 64L, 90L, 128L, 181L, - 256L, 362L, 512L, 724L, 1024L, 1448L, 2048L, 2896L, - 4096L, 5892L, 8192L, 11585L, 16384L, 23170L, 32768L, 46340L, - - 65536L, 92681L, 131072L, 185363L, 262144L, 370727L, - 524288L, 741455L, 1048576L, 1482910L, 2097152L, 2965820L, - 4194304L, 5931641L, 8388608L, 11863283L, 16777216L, 23726566L, - - 33554432L, 47453132L, 67108864L, 94906265L, - 134217728L, 189812531L, 268435456L, 379625062L, - 536870912L, 759250125L, 1073741824L, 1518500250L, - 2147483647L - }; - -#else - - /* documentation is in ftcalc.h */ - - FT_EXPORT_DEF( FT_Int32 ) - FT_Sqrt32( FT_Int32 x ) - { - FT_ULong val, root, newroot, mask; - - - root = 0; - mask = 0x40000000L; - val = (FT_ULong)x; - - do - { - newroot = root + mask; - if ( newroot <= val ) - { - val -= newroot; - root = newroot + mask; - } - - root >>= 1; - mask >>= 2; - - } while ( mask != 0 ); - - return root; - } - -#endif /* FT_CONFIG_OPTION_OLD_CALCS */ - - -#ifdef FT_LONG64 - - /* documentation is in freetype.h */ - - FT_EXPORT_DEF( FT_Long ) - FT_MulDiv( FT_Long a, - FT_Long b, - FT_Long c ) - { - FT_Int s; - FT_Long d; - - - s = 1; - if ( a < 0 ) { a = -a; s = -1; } - if ( b < 0 ) { b = -b; s = -s; } - if ( c < 0 ) { c = -c; s = -s; } - - d = (FT_Long)( c > 0 ? ( (FT_Int64)a * b + ( c >> 1 ) ) / c - : 0x7FFFFFFFL ); - - return ( s > 0 ) ? d : -d; - } - - - /* documentation is in freetype.h */ - - FT_EXPORT_DEF( FT_Long ) - FT_MulFix( FT_Long a, - FT_Long b ) - { - FT_Int s = 1; - FT_Long c; - - - if ( a < 0 ) { a = -a; s = -1; } - if ( b < 0 ) { b = -b; s = -s; } - - c = (FT_Long)( ( (FT_Int64)a * b + 0x8000 ) >> 16 ); - return ( s > 0 ) ? c : -c ; - } - - - /* documentation is in freetype.h */ - - FT_EXPORT_DEF( FT_Long ) - FT_DivFix( FT_Long a, - FT_Long b ) - { - FT_Int32 s; - FT_UInt32 q; - - s = 1; - if ( a < 0 ) { a = -a; s = -1; } - if ( b < 0 ) { b = -b; s = -s; } - - if ( b == 0 ) - /* check for division by 0 */ - q = 0x7FFFFFFFL; - else - /* compute result directly */ - q = (FT_UInt32)( ( ( (FT_Int64)a << 16 ) + ( b >> 1 ) ) / b ); - - return ( s < 0 ? -(FT_Long)q : (FT_Long)q ); - } - - -#ifdef FT_CONFIG_OPTION_OLD_CALCS - - /* a helper function for FT_Sqrt64() */ - - static int - ft_order64( FT_Int64 z ) - { - int j = 0; - - - while ( z ) - { - z = (unsigned FT_INT64)z >> 1; - j++; - } - return j - 1; - } - - - /* documentation is in ftcalc.h */ - - FT_EXPORT_DEF( FT_Int32 ) - FT_Sqrt64( FT_Int64 l ) - { - FT_Int64 r, s; - - - if ( l <= 0 ) return 0; - if ( l == 1 ) return 1; - - r = ft_square_roots[ft_order64( l )]; - - do - { - s = r; - r = ( r + l / r ) >> 1; - - } while ( r > s || r * r > l ); - - return (FT_Int32)r; - } - -#endif /* FT_CONFIG_OPTION_OLD_CALCS */ - - -#else /* FT_LONG64 */ - - - static void - ft_multo64( FT_UInt32 x, - FT_UInt32 y, - FT_Int64 *z ) - { - FT_UInt32 lo1, hi1, lo2, hi2, lo, hi, i1, i2; - - - lo1 = x & 0x0000FFFFU; hi1 = x >> 16; - lo2 = y & 0x0000FFFFU; hi2 = y >> 16; - - lo = lo1 * lo2; - i1 = lo1 * hi2; - i2 = lo2 * hi1; - hi = hi1 * hi2; - - /* Check carry overflow of i1 + i2 */ - i1 += i2; - hi += (FT_UInt32)( i1 < i2 ) << 16; - - hi += i1 >> 16; - i1 = i1 << 16; - - /* Check carry overflow of i1 + lo */ - lo += i1; - hi += ( lo < i1 ); - - z->lo = lo; - z->hi = hi; - } - - - static FT_UInt32 - ft_div64by32( FT_UInt32 hi, - FT_UInt32 lo, - FT_UInt32 y ) - { - FT_UInt32 r, q; - FT_Int i; - - - q = 0; - r = hi; - - if ( r >= y ) - return (FT_UInt32)0x7FFFFFFFL; - - i = 32; - do - { - r <<= 1; - q <<= 1; - r |= lo >> 31; - - if ( r >= (FT_UInt32)y ) - { - r -= y; - q |= 1; - } - lo <<= 1; - } while ( --i ); - - return q; - } - - - /* documentation is in ftcalc.h */ - - FT_EXPORT_DEF( void ) - FT_Add64( FT_Int64* x, - FT_Int64* y, - FT_Int64 *z ) - { - register FT_UInt32 lo, hi, max; - - - max = x->lo > y->lo ? x->lo : y->lo; - lo = x->lo + y->lo; - hi = x->hi + y->hi + ( lo < max ); - - z->lo = lo; - z->hi = hi; - } - - - /* documentation is in freetype.h */ - - FT_EXPORT_DEF( FT_Long ) - FT_MulDiv( FT_Long a, - FT_Long b, - FT_Long c ) - { - long s; - - - if ( a == 0 || b == c ) - return a; - - s = a; a = ABS( a ); - s ^= b; b = ABS( b ); - s ^= c; c = ABS( c ); - - if ( a <= 46340L && b <= 46340L && c <= 176095L && c > 0 ) - { - a = ( a * b + ( c >> 1 ) ) / c; - } - else if ( c > 0 ) - { - FT_Int64 temp, temp2; - - - ft_multo64( a, b, &temp ); - - temp2.hi = 0; - temp2.lo = (FT_UInt32)(c >> 1); - FT_Add64( &temp, &temp2, &temp ); - a = ft_div64by32( temp.hi, temp.lo, c ); - } - else - a = 0x7FFFFFFFL; - - return ( s < 0 ? -a : a ); - } - - - /* documentation is in freetype.h */ - - FT_EXPORT_DEF( FT_Long ) - FT_MulFix( FT_Long a, - FT_Long b ) - { - FT_Long s; - FT_ULong ua, ub; - - - if ( a == 0 || b == 0x10000L ) - return a; - - s = a; a = ABS(a); - s ^= b; b = ABS(b); - - ua = (FT_ULong)a; - ub = (FT_ULong)b; - - if ( ua <= 2048 && ub <= 1048576L ) - { - ua = ( ua * ub + 0x8000 ) >> 16; - } - else - { - FT_ULong al = ua & 0xFFFF; - - - ua = ( ua >> 16 ) * ub + al * ( ub >> 16 ) + - ( ( al * ( ub & 0xFFFF ) + 0x8000 ) >> 16 ); - } - - return ( s < 0 ? -(FT_Long)ua : ua ); - } - - - /* documentation is in freetype.h */ - - FT_EXPORT_DEF( FT_Long ) - FT_DivFix( FT_Long a, - FT_Long b ) - { - FT_Int32 s; - FT_UInt32 q; - - - s = a; a = ABS(a); - s ^= b; b = ABS(b); - - if ( b == 0 ) - { - /* check for division by 0 */ - q = 0x7FFFFFFFL; - } - else if ( ( a >> 16 ) == 0 ) - { - /* compute result directly */ - q = (FT_UInt32)( (a << 16) + (b >> 1) ) / (FT_UInt32)b; - } - else - { - /* we need more bits; we have to do it by hand */ - FT_Int64 temp, temp2; - - temp.hi = (FT_Int32) (a >> 16); - temp.lo = (FT_UInt32)(a << 16); - temp2.hi = 0; - temp2.lo = (FT_UInt32)( b >> 1 ); - FT_Add64( &temp, &temp2, &temp ); - q = ft_div64by32( temp.hi, temp.lo, b ); - } - - return ( s < 0 ? -(FT_Int32)q : (FT_Int32)q ); - } - - - /* documentation is in ftcalc.h */ - - FT_EXPORT_DEF( void ) - FT_MulTo64( FT_Int32 x, - FT_Int32 y, - FT_Int64 *z ) - { - FT_Int32 s; - - - s = x; x = ABS( x ); - s ^= y; y = ABS( y ); - - ft_multo64( x, y, z ); - - if ( s < 0 ) - { - z->lo = (FT_UInt32)-(FT_Int32)z->lo; - z->hi = ~z->hi + !( z->lo ); - } - } - - - /* documentation is in ftcalc.h */ - - FT_EXPORT_DEF( FT_Int32 ) - FT_Div64by32( FT_Int64* x, - FT_Int32 y ) - { - FT_Int32 s; - FT_UInt32 q; - - - s = x->hi; - if ( s < 0 ) - { - x->lo = (FT_UInt32)-(FT_Int32)x->lo; - x->hi = ~x->hi + !( x->lo ); - } - s ^= y; y = ABS( y ); - - /* Shortcut */ - if ( x->hi == 0 ) - { - if ( y > 0 ) - q = ( x->lo + ( y >> 1 ) ) / y; - else - q = 0x7FFFFFFFL; - - return ( s < 0 ? -(FT_Int32)q : (FT_Int32)q ); - } - - q = ft_div64by32( x->hi, x->lo, y ); - - return ( s < 0 ? -(FT_Int32)q : (FT_Int32)q ); - } - - -#ifdef FT_CONFIG_OPTION_OLD_CALCS - - - /* two helper functions for FT_Sqrt64() */ - - static void - FT_Sub64( FT_Int64* x, - FT_Int64* y, - FT_Int64* z ) - { - register FT_UInt32 lo, hi; - - - lo = x->lo - y->lo; - hi = x->hi - y->hi - ( (FT_Int32)lo < 0 ); - - z->lo = lo; - z->hi = hi; - } - - - static int - ft_order64( FT_Int64* z ) - { - FT_UInt32 i; - int j; - - - i = z->lo; - j = 0; - if ( z->hi ) - { - i = z->hi; - j = 32; - } - - while ( i > 0 ) - { - i >>= 1; - j++; - } - return j - 1; - } - - - /* documentation is in ftcalc.h */ - - FT_EXPORT_DEF( FT_Int32 ) - FT_Sqrt64( FT_Int64* l ) - { - FT_Int64 l2; - FT_Int32 r, s; - - - if ( (FT_Int32)l->hi < 0 || - ( l->hi == 0 && l->lo == 0 ) ) - return 0; - - s = ft_order64( l ); - if ( s == 0 ) - return 1; - - r = ft_square_roots[s]; - do - { - s = r; - r = ( r + FT_Div64by32( l, r ) ) >> 1; - FT_MulTo64( r, r, &l2 ); - FT_Sub64 ( l, &l2, &l2 ); - - } while ( r > s || (FT_Int32)l2.hi < 0 ); - - return r; - } - - -#endif /* FT_CONFIG_OPTION_OLD_CALCS */ - - -#endif /* FT_LONG64 */ - - - /* a not-so-fast but working 16.16 fixed point square root function */ - - FT_EXPORT_DEF( FT_Int32 ) - FT_SqrtFixed( FT_Int32 x ) - { - FT_UInt32 root, rem_hi, rem_lo, test_div; - FT_Int count; - - - root = 0; - - if ( x > 0 ) - { - rem_hi = 0; - rem_lo = x; - count = 24; - do - { - rem_hi = ( rem_hi << 2 ) | ( rem_lo >> 30 ); - rem_lo <<= 2; - root <<= 1; - test_div = ( root << 1 ) + 1; - - if ( rem_hi >= test_div ) - { - rem_hi -= test_div; - root += 1; - } - } while ( --count ); - } - - return (FT_Int32)root; - } - - -/* END */