/*Copyright 1990, 1994, 1998  The Open GroupAll Rights Reserved.The above copyright notice and this permission notice shall be included inall copies or substantial portions of the Software.THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS ORIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THEOPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER INAN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR INCONNECTION 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 beused in advertising or otherwise to promote the sale, use or other dealingsin 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"  /* Utility functions for reformatting font bitmaps */  static const unsigned char  _reverse_byte[0x100] =  {    0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,    0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,    0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,    0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,    0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,    0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,    0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,    0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,    0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,    0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,    0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,    0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,    0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,    0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,    0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,    0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,    0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,    0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,    0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,    0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,    0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,    0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,    0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,    0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,    0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,    0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,    0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,    0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,    0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,    0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,    0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,    0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff  };  /*   *  Invert bit order within each BYTE of an array.   */  FT_LOCAL_DEF( void )  BitOrderInvert( unsigned char*  buf,                  int             nbytes )  {    const unsigned char*  rev = _reverse_byte;    for ( ; --nbytes >= 0; buf++ )      *buf = rev[*buf];  }  /*   *  Invert byte order within each 16-bits of an array.   */  FT_LOCAL_DEF( void )  TwoByteSwap( unsigned char*  buf,               int             nbytes )  {    unsigned char  c;    for ( ; nbytes > 0; nbytes -= 2, buf += 2 )    {      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,                int             nbytes )  {    unsigned char  c;    for ( ; nbytes > 0; nbytes -= 4, buf += 4 )    {      c      = buf[0];      buf[0] = buf[3];      buf[3] = c;      c      = buf[1];      buf[1] = buf[2];      buf[2] = c;    }  }/* END */