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/*
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24 bit
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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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static void
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rfbInitOneRGBTable24 (uint8_t *table, int inMax, int outMax, int outShift,int swap);
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static void
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rfbInitColourMapSingleTable24(char **table, rfbPixelFormat *in,
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rfbPixelFormat *out,rfbColourMap* colourMap)
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{
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uint32_t i, r, g, b, outValue;
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uint8_t *t;
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uint8_t c;
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unsigned int nEntries = 1 << in->bitsPerPixel;
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int shift = colourMap->is16?16:8;
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if (*table) free(*table);
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*table = (char *)malloc(nEntries * 3 + 1);
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t = (uint8_t *)*table;
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for (i = 0; i < nEntries; i++) {
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r = g = b = 0;
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if(i < colourMap->count) {
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if(colourMap->is16) {
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r = colourMap->data.shorts[3*i+0];
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g = colourMap->data.shorts[3*i+1];
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b = colourMap->data.shorts[3*i+2];
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} else {
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r = colourMap->data.bytes[3*i+0];
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g = colourMap->data.bytes[3*i+1];
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b = colourMap->data.bytes[3*i+2];
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}
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}
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outValue = ((((r * (1 + out->redMax)) >> shift) << out->redShift) |
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(((g * (1 + out->greenMax)) >> shift) << out->greenShift) |
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(((b * (1 + out->blueMax)) >> shift) << out->blueShift));
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*(uint32_t*)&t[3*i] = outValue;
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if(!rfbEndianTest)
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memmove(t+3*i,t+3*i+1,3);
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if (out->bigEndian != in->bigEndian) {
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c = t[3*i]; t[3*i] = t[3*i+2]; t[3*i+2] = c;
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}
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}
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}
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/*
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* rfbInitTrueColourSingleTable sets up a single lookup table for truecolour
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* translation.
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*/
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static void
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rfbInitTrueColourSingleTable24 (char **table, rfbPixelFormat *in,
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rfbPixelFormat *out)
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{
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int i,outValue;
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int inRed, inGreen, inBlue, outRed, outGreen, outBlue;
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uint8_t *t;
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uint8_t c;
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int nEntries = 1 << in->bitsPerPixel;
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if (*table) free(*table);
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*table = (char *)malloc(nEntries * 3 + 1);
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t = (uint8_t *)*table;
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for (i = 0; i < nEntries; i++) {
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inRed = (i >> in->redShift) & in->redMax;
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inGreen = (i >> in->greenShift) & in->greenMax;
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inBlue = (i >> in->blueShift) & in->blueMax;
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outRed = (inRed * out->redMax + in->redMax / 2) / in->redMax;
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outGreen = (inGreen * out->greenMax + in->greenMax / 2) / in->greenMax;
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outBlue = (inBlue * out->blueMax + in->blueMax / 2) / in->blueMax;
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outValue = ((outRed << out->redShift) |
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(outGreen << out->greenShift) |
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(outBlue << out->blueShift));
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*(uint32_t*)&t[3*i] = outValue;
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if(!rfbEndianTest)
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memmove(t+3*i,t+3*i+1,3);
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if (out->bigEndian != in->bigEndian) {
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c = t[3*i]; t[3*i] = t[3*i+2]; t[3*i+2] = c;
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}
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}
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}
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/*
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* rfbInitTrueColourRGBTables sets up three separate lookup tables for the
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* red, green and blue values.
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*/
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static void
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rfbInitTrueColourRGBTables24 (char **table, rfbPixelFormat *in,
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rfbPixelFormat *out)
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{
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uint8_t *redTable;
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uint8_t *greenTable;
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uint8_t *blueTable;
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if (*table) free(*table);
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*table = (char *)malloc((in->redMax + in->greenMax + in->blueMax + 3)
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* 3 + 1);
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redTable = (uint8_t *)*table;
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greenTable = redTable + 3*(in->redMax + 1);
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blueTable = greenTable + 3*(in->greenMax + 1);
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rfbInitOneRGBTable24 (redTable, in->redMax, out->redMax,
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out->redShift, (out->bigEndian != in->bigEndian));
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rfbInitOneRGBTable24 (greenTable, in->greenMax, out->greenMax,
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out->greenShift, (out->bigEndian != in->bigEndian));
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rfbInitOneRGBTable24 (blueTable, in->blueMax, out->blueMax,
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out->blueShift, (out->bigEndian != in->bigEndian));
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}
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static void
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rfbInitOneRGBTable24 (uint8_t *table, int inMax, int outMax, int outShift,
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int swap)
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{
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int i;
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int nEntries = inMax + 1;
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uint32_t outValue;
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uint8_t c;
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for (i = 0; i < nEntries; i++) {
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outValue = ((i * outMax + inMax / 2) / inMax) << outShift;
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*(uint32_t *)&table[3*i] = outValue;
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if(!rfbEndianTest)
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memmove(table+3*i,table+3*i+1,3);
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if (swap) {
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c = table[3*i]; table[3*i] = table[3*i+2];
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table[3*i+2] = c;
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}
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}
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}
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