120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/*
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Copyright 1990, 1994, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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*/
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/* $XFree86: xc/lib/font/util/utilbitmap.c,v 1.3 1999/08/22 08:58:58 dawes Exp $ */
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/*
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* Author: Keith Packard, MIT X Consortium
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*/
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/* Modified for use with FreeType */
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#include "pcfutil.h"
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/*
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* Invert bit order within each BYTE of an array.
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*/
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FT_LOCAL_DEF( void )
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BitOrderInvert( unsigned char* buf,
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size_t nbytes )
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{
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for ( ; nbytes > 0; nbytes--, buf++ )
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{
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unsigned int val = *buf;
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val = ( ( val >> 1 ) & 0x55 ) | ( ( val << 1 ) & 0xAA );
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val = ( ( val >> 2 ) & 0x33 ) | ( ( val << 2 ) & 0xCC );
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val = ( ( val >> 4 ) & 0x0F ) | ( ( val << 4 ) & 0xF0 );
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*buf = (unsigned char)val;
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}
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}
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#if defined( __clang__ ) || \
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( defined( __GNUC__ ) && \
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( __GNUC__ > 4 || ( __GNUC__ == 4 && __GNUC_MINOR__ >= 8 ) ) )
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#define BSWAP16( x ) __builtin_bswap16( x )
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#define BSWAP32( x ) __builtin_bswap32( x )
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#elif defined( _MSC_VER ) && _MSC_VER >= 1300
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#pragma intrinsic( _byteswap_ushort )
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#pragma intrinsic( _byteswap_ulong )
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#define BSWAP16( x ) _byteswap_ushort( x )
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#define BSWAP32( x ) _byteswap_ulong( x )
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#else
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#define BSWAP16( x ) \
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(FT_UInt16)( ( ( ( x ) >> 8 ) & 0xff ) | \
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( ( ( x ) & 0xff ) << 8 ) )
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#define BSWAP32( x ) \
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(FT_UInt32)( ( ( ( x ) & 0xff000000u ) >> 24 ) | \
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( ( ( x ) & 0x00ff0000u ) >> 8 ) | \
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( ( ( x ) & 0x0000ff00u ) << 8 ) | \
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( ( ( x ) & 0x000000ffu ) << 24 ) )
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#endif
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/*
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* Invert byte order within each 16-bits of an array.
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*/
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FT_LOCAL_DEF( void )
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TwoByteSwap( unsigned char* buf,
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size_t nbytes )
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{
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FT_UInt16* b = (FT_UInt16*)buf;
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for ( ; nbytes >= 2; nbytes -= 2, b++ )
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*b = BSWAP16( *b );
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}
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/*
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* Invert byte order within each 32-bits of an array.
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*/
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FT_LOCAL_DEF( void )
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FourByteSwap( unsigned char* buf,
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size_t nbytes )
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{
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FT_UInt32* b = (FT_UInt32*)buf;
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for ( ; nbytes >= 4; nbytes -= 4, b++ )
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*b = BSWAP32( *b );
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}
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/* END */
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