Shared TDE VNC library sources
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libtdevnc/libvncserver/tableinitcmtemplate.c

84 lines
2.8 KiB

/*
* tableinitcmtemplate.c - template for initialising lookup tables for
* translation from a colour map to true colour.
*
* 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 a function which allocates an
* appropriately sized lookup table and initialises it.
*
* 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 <mcguirk@incompleteness.net>.
* 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 rfbInitColourMapSingleTableOUT \
CONCAT2E(rfbInitColourMapSingleTable,OUT)
static void
rfbInitColourMapSingleTableOUT(char **table, rfbPixelFormat *in,
rfbPixelFormat *out,rfbColourMap* colourMap)
{
uint32_t i, r, g, b;
OUT_T *t;
uint32_t nEntries = 1 << in->bitsPerPixel;
int shift = colourMap->is16?16:8;
if (*table) free(*table);
*table = (char *)malloc(nEntries * sizeof(OUT_T));
t = (OUT_T *)*table;
for (i = 0; i < nEntries; i++) {
r = g = b = 0;
if(i < colourMap->count) {
if(colourMap->is16) {
r = colourMap->data.shorts[3*i+0];
g = colourMap->data.shorts[3*i+1];
b = colourMap->data.shorts[3*i+2];
} else {
r = colourMap->data.bytes[3*i+0];
g = colourMap->data.bytes[3*i+1];
b = colourMap->data.bytes[3*i+2];
}
}
t[i] = ((((r * (1 + out->redMax)) >> shift) << out->redShift) |
(((g * (1 + out->greenMax)) >> shift) << out->greenShift) |
(((b * (1 + out->blueMax)) >> shift) << out->blueShift));
#if (OUT != 8)
if (out->bigEndian != in->bigEndian) {
t[i] = SwapOUT(t[i]);
}
#endif
}
}
#undef OUT_T
#undef SwapOUT
#undef rfbInitColourMapSingleTableOUT