3 Copyright 1990, 1994, 1998 The Open Group
7 The above copyright notice and this permission notice shall be included in
8 all copies or substantial portions of the Software.
10 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
11 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
12 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
13 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
14 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
17 Except as contained in this notice, the name of The Open Group shall not be
18 used in advertising or otherwise to promote the sale, use or other dealings
19 in this Software without prior written authorization from The Open Group.
22 /* $XFree86: xc/lib/font/util/utilbitmap.c,v 1.3 1999/08/22 08:58:58 dawes Exp $ */
25 * Author: Keith Packard, MIT X Consortium
33 /* Utility functions for reformatting font bitmaps */
35 static const unsigned char _reverse_byte[0x100] =
37 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
38 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
39 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
40 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
41 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
42 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
43 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
44 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
45 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
46 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
47 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
48 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
49 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
50 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
51 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
52 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
53 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
54 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
55 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
56 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
57 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
58 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
59 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
60 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
61 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
62 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
63 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
64 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
65 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
66 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
67 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
68 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
72 * Invert bit order within each BYTE of an array.
76 BitOrderInvert( unsigned char* buf,
79 const unsigned char* rev = _reverse_byte;
82 for ( ; --nbytes >= 0; buf++ )
88 * Invert byte order within each 16-bits of an array.
92 TwoByteSwap( unsigned char* buf,
98 for ( ; nbytes > 0; nbytes -= 2, buf += 2 )
107 * Invert byte order within each 32-bits of an array.
111 FourByteSwap( unsigned char* buf,
117 for ( ; nbytes > 0; nbytes -= 4, buf += 4 )
135 RepadBitmap( char* pSrc,
142 int srcWidthBytes, dstWidthBytes;
144 char *pTmpSrc, *pTmpDst;
150 srcWidthBytes = ( width + 7 ) >> 3;
154 srcWidthBytes = ( ( width + 15 ) >> 4 ) << 1;
158 srcWidthBytes = ( ( width + 31 ) >> 5 ) << 2;
162 srcWidthBytes = ( ( width + 63 ) >> 6 ) << 3;
172 dstWidthBytes = ( width + 7 ) >> 3;
176 dstWidthBytes = ( ( width + 15 ) >> 4 ) << 1;
180 dstWidthBytes = ( ( width + 31 ) >> 5 ) << 2;
184 dstWidthBytes = ( ( width + 63 ) >> 6 ) << 3;
191 width = srcWidthBytes;
192 if ( width > dstWidthBytes )
193 width = dstWidthBytes;
198 for ( row = 0; row < height; row++ )
200 for ( col = 0; col < width; col++ )
201 *pTmpDst++ = *pTmpSrc++;
203 while ( col < dstWidthBytes )
208 pTmpSrc += srcWidthBytes - width;
211 return dstWidthBytes * height;