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118 lines
3.9 KiB
118 lines
3.9 KiB
15 years ago
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/*
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* tabletranstemplate.c - template for translation using lookup tables.
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*
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* This file shouldn't be compiled. It is included multiple times by
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* translate.c, each time with different definitions of the macros IN and OUT.
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*
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* For each pair of values IN and OUT, this file defines two functions for
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* translating a given rectangle of pixel data. One uses a single lookup
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* table, and the other uses three separate lookup tables for the red, green
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* and blue values.
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*
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* I know this code isn't nice to read because of all the macros, but
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* efficiency is important here.
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*/
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/*
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* OSXvnc Copyright (C) 2001 Dan McGuirk <mcguirk@incompleteness.net>.
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* Original Xvnc code Copyright (C) 1999 AT&T Laboratories Cambridge.
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* All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#if !defined(IN) || !defined(OUT)
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#error "This file shouldn't be compiled."
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#error "It is included as part of translate.c"
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#endif
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#define IN_T CONCAT2E(CARD,IN)
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#define OUT_T CONCAT2E(CARD,OUT)
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#define rfbTranslateWithSingleTableINtoOUT \
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CONCAT4E(rfbTranslateWithSingleTable,IN,to,OUT)
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#define rfbTranslateWithRGBTablesINtoOUT \
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CONCAT4E(rfbTranslateWithRGBTables,IN,to,OUT)
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/*
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* rfbTranslateWithSingleTableINtoOUT translates a rectangle of pixel data
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* using a single lookup table.
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*/
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static void
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rfbTranslateWithSingleTableINtoOUT (char *table, rfbPixelFormat *in,
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rfbPixelFormat *out,
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char *iptr, char *optr,
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int bytesBetweenInputLines,
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int width, int height)
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{
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IN_T *ip = (IN_T *)iptr;
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OUT_T *op = (OUT_T *)optr;
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int ipextra = bytesBetweenInputLines / sizeof(IN_T) - width;
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OUT_T *opLineEnd;
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OUT_T *t = (OUT_T *)table;
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while (height > 0) {
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opLineEnd = op + width;
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while (op < opLineEnd) {
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*(op++) = t[*(ip++)];
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}
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ip += ipextra;
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height--;
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}
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}
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/*
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* rfbTranslateWithRGBTablesINtoOUT translates a rectangle of pixel data
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* using three separate lookup tables for the red, green and blue values.
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*/
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static void
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rfbTranslateWithRGBTablesINtoOUT (char *table, rfbPixelFormat *in,
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rfbPixelFormat *out,
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char *iptr, char *optr,
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int bytesBetweenInputLines,
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int width, int height)
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{
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IN_T *ip = (IN_T *)iptr;
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OUT_T *op = (OUT_T *)optr;
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int ipextra = bytesBetweenInputLines / sizeof(IN_T) - width;
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OUT_T *opLineEnd;
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OUT_T *redTable = (OUT_T *)table;
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OUT_T *greenTable = redTable + in->redMax + 1;
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OUT_T *blueTable = greenTable + in->greenMax + 1;
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while (height > 0) {
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opLineEnd = &op[width];
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while (op < opLineEnd) {
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*(op++) = (redTable[(*ip >> in->redShift) & in->redMax] |
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greenTable[(*ip >> in->greenShift) & in->greenMax] |
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blueTable[(*ip >> in->blueShift) & in->blueMax]);
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ip++;
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}
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ip += ipextra;
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height--;
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}
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}
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#undef IN_T
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#undef OUT_T
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#undef rfbTranslateWithSingleTableINtoOUT
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#undef rfbTranslateWithRGBTablesINtoOUT
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