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authordscho <dscho>2001-08-01 11:52:01 +0000
committerdscho <dscho>2001-08-01 11:52:01 +0000
commit757fdc2454a97890c119cca8662b8d1763265e9a (patch)
tree44256826d7aafaa816041a18fa0405097f2ed4cd /tabletranstemplate.c
downloadlibtdevnc-757fdc2454a97890c119cca8662b8d1763265e9a.tar.gz
libtdevnc-757fdc2454a97890c119cca8662b8d1763265e9a.zip
Initial revision
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+/*
+ * tabletranstemplate.c - template for translation using lookup tables.
+ *
+ * This file shouldn't be compiled. It is included multiple times by
+ * translate.c, each time with different definitions of the macros IN and OUT.
+ *
+ * For each pair of values IN and OUT, this file defines two functions for
+ * translating a given rectangle of pixel data. One uses a single lookup
+ * table, and the other uses 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(IN) || !defined(OUT)
+#error "This file shouldn't be compiled."
+#error "It is included as part of translate.c"
+#endif
+
+#define IN_T CONCAT2E(CARD,IN)
+#define OUT_T CONCAT2E(CARD,OUT)
+#define rfbTranslateWithSingleTableINtoOUT \
+ CONCAT4E(rfbTranslateWithSingleTable,IN,to,OUT)
+#define rfbTranslateWithRGBTablesINtoOUT \
+ CONCAT4E(rfbTranslateWithRGBTables,IN,to,OUT)
+
+/*
+ * rfbTranslateWithSingleTableINtoOUT translates a rectangle of pixel data
+ * using a single lookup table.
+ */
+
+static void
+rfbTranslateWithSingleTableINtoOUT (char *table, rfbPixelFormat *in,
+ rfbPixelFormat *out,
+ char *iptr, char *optr,
+ int bytesBetweenInputLines,
+ int width, int height)
+{
+ IN_T *ip = (IN_T *)iptr;
+ OUT_T *op = (OUT_T *)optr;
+ int ipextra = bytesBetweenInputLines / sizeof(IN_T) - width;
+ OUT_T *opLineEnd;
+ OUT_T *t = (OUT_T *)table;
+
+ while (height > 0) {
+ opLineEnd = op + width;
+
+ while (op < opLineEnd) {
+ *(op++) = t[*(ip++)];
+ }
+
+ ip += ipextra;
+ height--;
+ }
+}
+
+
+/*
+ * rfbTranslateWithRGBTablesINtoOUT translates a rectangle of pixel data
+ * using three separate lookup tables for the red, green and blue values.
+ */
+
+static void
+rfbTranslateWithRGBTablesINtoOUT (char *table, rfbPixelFormat *in,
+ rfbPixelFormat *out,
+ char *iptr, char *optr,
+ int bytesBetweenInputLines,
+ int width, int height)
+{
+ IN_T *ip = (IN_T *)iptr;
+ OUT_T *op = (OUT_T *)optr;
+ int ipextra = bytesBetweenInputLines / sizeof(IN_T) - width;
+ OUT_T *opLineEnd;
+ OUT_T *redTable = (OUT_T *)table;
+ OUT_T *greenTable = redTable + in->redMax + 1;
+ OUT_T *blueTable = greenTable + in->greenMax + 1;
+
+ while (height > 0) {
+ opLineEnd = op + width;
+
+ while (op < opLineEnd) {
+ *(op++) = (redTable[(*ip >> in->redShift) & in->redMax] |
+ greenTable[(*ip >> in->greenShift) & in->greenMax] |
+ blueTable[(*ip >> in->blueShift) & in->blueMax]);
+ ip++;
+ }
+ ip += ipextra;
+ height--;
+ }
+}
+
+#undef IN_T
+#undef OUT_T
+#undef rfbTranslateWithSingleTableINtoOUT
+#undef rfbTranslateWithRGBTablesINtoOUT