/* | |
Copyright 1990, 1994, 1998 The Open Group | |
Permission to use, copy, modify, distribute, and sell this software and its | |
documentation for any purpose is hereby granted without fee, provided that | |
the above copyright notice appear in all copies and that both that | |
copyright notice and this permission notice appear in supporting | |
documentation. | |
The above copyright notice and this permission notice shall be included in | |
all copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN | |
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
Except as contained in this notice, the name of The Open Group shall not be | |
used in advertising or otherwise to promote the sale, use or other dealings | |
in this Software without prior written authorization from The Open Group. | |
*/ | |
/* $XFree86: xc/lib/font/util/utilbitmap.c,v 1.3 1999/08/22 08:58:58 dawes Exp $ */ | |
/* | |
* Author: Keith Packard, MIT X Consortium | |
*/ | |
/* Modified for use with FreeType */ | |
#include <ft2build.h> | |
#include "pcfutil.h" | |
/* | |
* Invert bit order within each BYTE of an array. | |
*/ | |
FT_LOCAL_DEF( void ) | |
BitOrderInvert( unsigned char* buf, | |
size_t nbytes ) | |
{ | |
for ( ; nbytes > 0; nbytes--, buf++ ) | |
{ | |
unsigned int val = *buf; | |
val = ( ( val >> 1 ) & 0x55 ) | ( ( val << 1 ) & 0xAA ); | |
val = ( ( val >> 2 ) & 0x33 ) | ( ( val << 2 ) & 0xCC ); | |
val = ( ( val >> 4 ) & 0x0F ) | ( ( val << 4 ) & 0xF0 ); | |
*buf = (unsigned char)val; | |
} | |
} | |
/* | |
* Invert byte order within each 16-bits of an array. | |
*/ | |
FT_LOCAL_DEF( void ) | |
TwoByteSwap( unsigned char* buf, | |
size_t nbytes ) | |
{ | |
for ( ; nbytes >= 2; nbytes -= 2, buf += 2 ) | |
{ | |
unsigned char c; | |
c = buf[0]; | |
buf[0] = buf[1]; | |
buf[1] = c; | |
} | |
} | |
/* | |
* Invert byte order within each 32-bits of an array. | |
*/ | |
FT_LOCAL_DEF( void ) | |
FourByteSwap( unsigned char* buf, | |
size_t nbytes ) | |
{ | |
for ( ; nbytes >= 4; nbytes -= 4, buf += 4 ) | |
{ | |
unsigned char c; | |
c = buf[0]; | |
buf[0] = buf[3]; | |
buf[3] = c; | |
c = buf[1]; | |
buf[1] = buf[2]; | |
buf[2] = c; | |
} | |
} | |
/* END */ |