/apps/desktop/libvncserver/tabletranstemplate.c
http://ftk.googlecode.com/ · C · 117 lines · 61 code · 14 blank · 42 comment · 5 complexity · 50362bf1dd062effce254fb9b274cb6a MD5 · raw file
- /*
- * tabletranstemplate.c - template for translation using lookup tables.
- *
- * This file shouldn't be compiled. It is included multiple times by
- * translate.c, each time with different definitions of the macros IN and OUT.
- *
- * For each pair of values IN and OUT, this file defines two functions for
- * translating a given rectangle of pixel data. One uses a single lookup
- * table, and the other uses three separate lookup tables for the red, green
- * and blue values.
- *
- * I know this code isn't nice to read because of all the macros, but
- * efficiency is important here.
- */
- /*
- * OSXvnc Copyright (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>.
- * Original Xvnc code Copyright (C) 1999 AT&T Laboratories Cambridge.
- * All Rights Reserved.
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
- #if !defined(IN) || !defined(OUT)
- #error "This file shouldn't be compiled."
- #error "It is included as part of translate.c"
- #endif
- #define IN_T CONCAT3E(uint,IN,_t)
- #define OUT_T CONCAT3E(uint,OUT,_t)
- #define rfbTranslateWithSingleTableINtoOUT \
- CONCAT4E(rfbTranslateWithSingleTable,IN,to,OUT)
- #define rfbTranslateWithRGBTablesINtoOUT \
- CONCAT4E(rfbTranslateWithRGBTables,IN,to,OUT)
- /*
- * rfbTranslateWithSingleTableINtoOUT translates a rectangle of pixel data
- * using a single lookup table.
- */
- static void
- rfbTranslateWithSingleTableINtoOUT (char *table, rfbPixelFormat *in,
- rfbPixelFormat *out,
- char *iptr, char *optr,
- int bytesBetweenInputLines,
- int width, int height)
- {
- IN_T *ip = (IN_T *)iptr;
- OUT_T *op = (OUT_T *)optr;
- int ipextra = bytesBetweenInputLines / sizeof(IN_T) - width;
- OUT_T *opLineEnd;
- OUT_T *t = (OUT_T *)table;
- while (height > 0) {
- opLineEnd = op + width;
- while (op < opLineEnd) {
- *(op++) = t[*(ip++)];
- }
- ip += ipextra;
- height--;
- }
- }
- /*
- * rfbTranslateWithRGBTablesINtoOUT translates a rectangle of pixel data
- * using three separate lookup tables for the red, green and blue values.
- */
- static void
- rfbTranslateWithRGBTablesINtoOUT (char *table, rfbPixelFormat *in,
- rfbPixelFormat *out,
- char *iptr, char *optr,
- int bytesBetweenInputLines,
- int width, int height)
- {
- IN_T *ip = (IN_T *)iptr;
- OUT_T *op = (OUT_T *)optr;
- int ipextra = bytesBetweenInputLines / sizeof(IN_T) - width;
- OUT_T *opLineEnd;
- OUT_T *redTable = (OUT_T *)table;
- OUT_T *greenTable = redTable + in->redMax + 1;
- OUT_T *blueTable = greenTable + in->greenMax + 1;
- while (height > 0) {
- opLineEnd = &op[width];
- while (op < opLineEnd) {
- *(op++) = (redTable[(*ip >> in->redShift) & in->redMax] |
- greenTable[(*ip >> in->greenShift) & in->greenMax] |
- blueTable[(*ip >> in->blueShift) & in->blueMax]);
- ip++;
- }
- ip += ipextra;
- height--;
- }
- }
- #undef IN_T
- #undef OUT_T
- #undef rfbTranslateWithSingleTableINtoOUT
- #undef rfbTranslateWithRGBTablesINtoOUT