You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
4.7 KiB
143 lines
4.7 KiB
/*
|
|
* 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 <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 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
|