| /* |
| |
| Copyright 1990, 1994, 1998 The Open Group |
| |
| All Rights Reserved. |
| |
| 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 |
| */ |
| |
| |
| #include <ft2build.h> |
| #include FT_SOURCE_FILE(pcf,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. |
| */ |
| |
| 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. |
| */ |
| |
| 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. |
| */ |
| |
| 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; |
| } |
| } |
| |
| |
| /* |
| * Repad a bitmap. |
| */ |
| |
| int RepadBitmap( char* pSrc, |
| char* pDst, |
| unsigned int srcPad, |
| unsigned int dstPad, |
| int width, |
| int height ) |
| { |
| int srcWidthBytes, dstWidthBytes; |
| int row, col; |
| char *pTmpSrc, *pTmpDst; |
| |
| |
| switch ( srcPad ) |
| { |
| case 1: |
| srcWidthBytes = ( width + 7 ) >> 3; |
| break; |
| |
| case 2: |
| srcWidthBytes = ( ( width + 15 ) >> 4 ) << 1; |
| break; |
| |
| case 4: |
| srcWidthBytes = ( ( width + 31 ) >> 5 ) << 2; |
| break; |
| |
| case 8: |
| srcWidthBytes = ( ( width + 63 ) >> 6 ) << 3; |
| break; |
| |
| default: |
| return 0; |
| } |
| |
| switch ( dstPad ) |
| { |
| case 1: |
| dstWidthBytes = ( width + 7 ) >> 3; |
| break; |
| |
| case 2: |
| dstWidthBytes = ( ( width + 15 ) >> 4 ) << 1; |
| break; |
| |
| case 4: |
| dstWidthBytes = ( ( width + 31 ) >> 5 ) << 2; |
| break; |
| |
| case 8: |
| dstWidthBytes = ( ( width + 63 ) >> 6 ) << 3; |
| break; |
| |
| default: |
| return 0; |
| } |
| |
| width = srcWidthBytes; |
| if ( width > dstWidthBytes ) |
| width = dstWidthBytes; |
| |
| pTmpSrc= pSrc; |
| pTmpDst= pDst; |
| |
| for ( row = 0; row < height; row++ ) |
| { |
| for ( col = 0; col < width; col++ ) |
| *pTmpDst++ = *pTmpSrc++; |
| |
| while ( col < dstWidthBytes ) |
| { |
| *pTmpDst++ = '\0'; |
| col++; |
| } |
| pTmpSrc += srcWidthBytes - width; |
| } |
| |
| return dstWidthBytes * height; |
| } |
| |
| |
| /* END */ |