0,0 → 1,104 |
/* |
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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 |
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. |
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The above copyright notice and this permission notice shall be included in |
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 |
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. |
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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. |
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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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/* |
* Author: Keith Packard, MIT X Consortium |
*/ |
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/* Modified for use with FreeType */ |
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#include <ft2build.h> |
#include "pcfutil.h" |
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/* |
* Invert bit order within each BYTE of an array. |
*/ |
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FT_LOCAL_DEF( void ) |
BitOrderInvert( unsigned char* buf, |
size_t nbytes ) |
{ |
for ( ; nbytes > 0; nbytes--, buf++ ) |
{ |
unsigned int val = *buf; |
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val = ( ( val >> 1 ) & 0x55 ) | ( ( val << 1 ) & 0xAA ); |
val = ( ( val >> 2 ) & 0x33 ) | ( ( val << 2 ) & 0xCC ); |
val = ( ( val >> 4 ) & 0x0F ) | ( ( val << 4 ) & 0xF0 ); |
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*buf = (unsigned char)val; |
} |
} |
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/* |
* Invert byte order within each 16-bits of an array. |
*/ |
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FT_LOCAL_DEF( void ) |
TwoByteSwap( unsigned char* buf, |
size_t nbytes ) |
{ |
unsigned char c; |
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for ( ; nbytes >= 2; nbytes -= 2, buf += 2 ) |
{ |
c = buf[0]; |
buf[0] = buf[1]; |
buf[1] = c; |
} |
} |
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/* |
* Invert byte order within each 32-bits of an array. |
*/ |
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FT_LOCAL_DEF( void ) |
FourByteSwap( unsigned char* buf, |
size_t nbytes ) |
{ |
unsigned char c; |
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for ( ; nbytes >= 4; nbytes -= 4, buf += 4 ) |
{ |
c = buf[0]; |
buf[0] = buf[3]; |
buf[3] = c; |
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c = buf[1]; |
buf[1] = buf[2]; |
buf[2] = c; |
} |
} |
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/* END */ |