| /* |
| |
| 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 "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 */ |