/* * tableinittctemplate.c - template for initialising lookup tables for * truecolour to truecolour translation. * * This file shouldn't be compiled. It is included multiple times by * translate.c, each time with a different definition of the macro OUT. * For each value of OUT, this file defines two functions for initialising * lookup tables. One is for truecolour translation using a single lookup * table, the other is for truecolour translation using 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(OUT) #error "This file shouldn't be compiled." #error "It is included as part of translate.c" #endif #define OUT_T CONCAT3E(uint,OUT,_t) #define SwapOUT(x) CONCAT2E(Swap,OUT(x)) #define rfbInitTrueColourSingleTableOUT \ CONCAT2E(rfbInitTrueColourSingleTable,OUT) #define rfbInitTrueColourRGBTablesOUT CONCAT2E(rfbInitTrueColourRGBTables,OUT) #define rfbInitOneRGBTableOUT CONCAT2E(rfbInitOneRGBTable,OUT) static void rfbInitOneRGBTableOUT (OUT_T *table, int inMax, int outMax, int outShift, int swap); /* * rfbInitTrueColourSingleTable sets up a single lookup table for truecolour * translation. */ static void rfbInitTrueColourSingleTableOUT (char **table, rfbPixelFormat *in, rfbPixelFormat *out) { int i; int inRed, inGreen, inBlue, outRed, outGreen, outBlue; OUT_T *t; int nEntries = 1 << in->bitsPerPixel; if (*table) free(*table); *table = (char *)malloc(nEntries * sizeof(OUT_T)); t = (OUT_T *)*table; for (i = 0; i < nEntries; i++) { inRed = (i >> in->redShift) & in->redMax; inGreen = (i >> in->greenShift) & in->greenMax; inBlue = (i >> in->blueShift) & in->blueMax; outRed = (inRed * out->redMax + in->redMax / 2) / in->redMax; outGreen = (inGreen * out->greenMax + in->greenMax / 2) / in->greenMax; outBlue = (inBlue * out->blueMax + in->blueMax / 2) / in->blueMax; t[i] = ((outRed << out->redShift) | (outGreen << out->greenShift) | (outBlue << out->blueShift)); #if (OUT != 8) if (out->bigEndian != in->bigEndian) { t[i] = SwapOUT(t[i]); } #endif } } /* * rfbInitTrueColourRGBTables sets up three separate lookup tables for the * red, green and blue values. */ static void rfbInitTrueColourRGBTablesOUT (char **table, rfbPixelFormat *in, rfbPixelFormat *out) { OUT_T *redTable; OUT_T *greenTable; OUT_T *blueTable; if (*table) free(*table); *table = (char *)malloc((in->redMax + in->greenMax + in->blueMax + 3) * sizeof(OUT_T)); redTable = (OUT_T *)*table; greenTable = redTable + in->redMax + 1; blueTable = greenTable + in->greenMax + 1; rfbInitOneRGBTableOUT (redTable, in->redMax, out->redMax, out->redShift, (out->bigEndian != in->bigEndian)); rfbInitOneRGBTableOUT (greenTable, in->greenMax, out->greenMax, out->greenShift, (out->bigEndian != in->bigEndian)); rfbInitOneRGBTableOUT (blueTable, in->blueMax, out->blueMax, out->blueShift, (out->bigEndian != in->bigEndian)); } static void rfbInitOneRGBTableOUT (OUT_T *table, int inMax, int outMax, int outShift, int swap) { int i; int nEntries = inMax + 1; for (i = 0; i < nEntries; i++) { table[i] = ((i * outMax + inMax / 2) / inMax) << outShift; #if (OUT != 8) if (swap) { table[i] = SwapOUT(table[i]); } #endif } } #undef OUT_T #undef SwapOUT #undef rfbInitTrueColourSingleTableOUT #undef rfbInitTrueColourRGBTablesOUT #undef rfbInitOneRGBTableOUT