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/*
* 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.
*/
/*
* 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 CONCAT2E(CARD,IN)
#define OUT_T CONCAT2E(CARD,OUT)
#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
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