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85 lines
2.8 KiB
85 lines
2.8 KiB
/*
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* tableinitcmtemplate.c - template for initialising lookup tables for
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* translation from a colour map to true colour.
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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 a different definition of the macro OUT.
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* For each value of OUT, this file defines a function which allocates an
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* appropriately sized lookup table and initialises it.
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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(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 OUT_T CONCAT3E(uint,OUT,_t)
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#define SwapOUT(x) CONCAT2E(Swap,OUT(x))
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#define rfbInitColourMapSingleTableOUT \
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CONCAT2E(rfbInitColourMapSingleTable,OUT)
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static void
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rfbInitColourMapSingleTableOUT(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;
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OUT_T *t;
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uint32_t 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 * sizeof(OUT_T));
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t = (OUT_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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t[i] = ((((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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#if (OUT != 8)
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if (out->bigEndian != in->bigEndian) {
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t[i] = SwapOUT(t[i]);
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}
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#endif
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}
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}
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#undef OUT_T
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#undef SwapOUT
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#undef rfbInitColourMapSingleTableOUT
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