/apps/desktop/libvncserver/tableinittctemplate.c
http://ftk.googlecode.com/ · C · 142 lines · 81 code · 19 blank · 42 comment · 12 complexity · 7943c24153fc6b77714d8f0f348b4505 MD5 · raw file
- /*
- * 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