/* * 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 . * 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