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-rw-r--r--tabletrans24template.c281
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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(BPP)
+#error "This file shouldn't be compiled."
+#error "It is included as part of translate.c"
+#endif
+
+#if BPP == 24
+
+/*
+ * rfbTranslateWithSingleTableINtoOUT translates a rectangle of pixel data
+ * using a single lookup table.
+ */
+
+static void
+rfbTranslateWithSingleTable24to24 (char *table, rfbPixelFormat *in,
+ rfbPixelFormat *out,
+ char *iptr, char *optr,
+ int bytesBetweenInputLines,
+ int width, int height)
+{
+ CARD8 *ip = (CARD8 *)iptr;
+ CARD8 *op = (CARD8 *)optr;
+ int ipextra = bytesBetweenInputLines / 3 - width;
+ CARD8 *opLineEnd;
+ CARD8 *t = (CARD8 *)table;
+ int shift = rfbEndianTest?0:8;
+ CARD8 c;
+
+ while (height > 0) {
+ opLineEnd = op + width*3;
+
+ while (op < opLineEnd) {
+ *(CARD32*)op = t[((*(CARD32 *)ip)>>shift)&0x00ffffff];
+ if(!rfbEndianTest)
+ memmove(op,op+1,3);
+ if (out->bigEndian != in->bigEndian) {
+ c = op[0]; op[0] = op[2]; op[2] = c;
+ }
+ op += 3;
+ ip += 3;
+ }
+
+ ip += ipextra;
+ height--;
+ }
+}
+
+/*
+ * rfbTranslateWithRGBTablesINtoOUT translates a rectangle of pixel data
+ * using three separate lookup tables for the red, green and blue values.
+ */
+
+static void
+rfbTranslateWithRGBTables24to24 (char *table, rfbPixelFormat *in,
+ rfbPixelFormat *out,
+ char *iptr, char *optr,
+ int bytesBetweenInputLines,
+ int width, int height)
+{
+ CARD8 *ip = (CARD8 *)iptr;
+ CARD8 *op = (CARD8 *)optr;
+ int ipextra = bytesBetweenInputLines / 3 - width;
+ CARD8 *opLineEnd;
+ CARD8 *redTable = (CARD8 *)table;
+ CARD8 *greenTable = redTable + 3*(in->redMax + 1);
+ CARD8 *blueTable = greenTable + 3*(in->greenMax + 1);
+ CARD32 outValue,inValue;
+ int shift = rfbEndianTest?0:8;
+
+ while (height > 0) {
+ opLineEnd = op+3*width;
+
+ while (op < opLineEnd) {
+ inValue = ((*(CARD32 *)ip)>>shift)&0x00ffffff;
+ outValue = (redTable[(inValue >> in->redShift) & in->redMax] |
+ greenTable[(inValue >> in->greenShift) & in->greenMax] |
+ blueTable[(inValue >> in->blueShift) & in->blueMax]);
+ memcpy(op,&outValue,3);
+ op += 3;
+ ip+=3;
+ }
+ ip += ipextra;
+ height--;
+ }
+}
+
+#else
+
+#define IN_T CONCAT2E(CARD,BPP)
+#define OUT_T CONCAT2E(CARD,BPP)
+#define rfbTranslateWithSingleTable24toOUT \
+ CONCAT4E(rfbTranslateWithSingleTable,24,to,BPP)
+#define rfbTranslateWithSingleTableINto24 \
+ CONCAT4E(rfbTranslateWithSingleTable,BPP,to,24)
+#define rfbTranslateWithRGBTables24toOUT \
+ CONCAT4E(rfbTranslateWithRGBTables,24,to,BPP)
+#define rfbTranslateWithRGBTablesINto24 \
+ CONCAT4E(rfbTranslateWithRGBTables,BPP,to,24)
+
+/*
+ * rfbTranslateWithSingleTableINtoOUT translates a rectangle of pixel data
+ * using a single lookup table.
+ */
+
+static void
+rfbTranslateWithSingleTable24toOUT (char *table, rfbPixelFormat *in,
+ rfbPixelFormat *out,
+ char *iptr, char *optr,
+ int bytesBetweenInputLines,
+ int width, int height)
+{
+ CARD8 *ip = (CARD8 *)iptr;
+ OUT_T *op = (OUT_T *)optr;
+ int ipextra = bytesBetweenInputLines / 3 - width;
+ OUT_T *opLineEnd;
+ OUT_T *t = (OUT_T *)table;
+ int shift = rfbEndianTest?0:8;
+
+ while (height > 0) {
+ opLineEnd = op + width;
+
+ while (op < opLineEnd) {
+ *(op++) = t[((*(CARD32 *)ip)>>shift)&0x00ffffff];
+ ip+=3;
+ }
+
+ ip += ipextra;
+ height--;
+ }
+}
+
+
+/*
+ * rfbTranslateWithRGBTablesINtoOUT translates a rectangle of pixel data
+ * using three separate lookup tables for the red, green and blue values.
+ */
+
+static void
+rfbTranslateWithRGBTables24toOUT (char *table, rfbPixelFormat *in,
+ rfbPixelFormat *out,
+ char *iptr, char *optr,
+ int bytesBetweenInputLines,
+ int width, int height)
+{
+ CARD8 *ip = (CARD8 *)iptr;
+ OUT_T *op = (OUT_T *)optr;
+ int ipextra = bytesBetweenInputLines / 3 - width;
+ OUT_T *opLineEnd;
+ OUT_T *redTable = (OUT_T *)table;
+ OUT_T *greenTable = redTable + in->redMax + 1;
+ OUT_T *blueTable = greenTable + in->greenMax + 1;
+ CARD32 inValue;
+ int shift = rfbEndianTest?0:8;
+
+ while (height > 0) {
+ opLineEnd = &op[width];
+
+ while (op < opLineEnd) {
+ inValue = ((*(CARD32 *)ip)>>shift)&0x00ffffff;
+ *(op++) = (redTable[(inValue >> in->redShift) & in->redMax] |
+ greenTable[(inValue >> in->greenShift) & in->greenMax] |
+ blueTable[(inValue >> in->blueShift) & in->blueMax]);
+ ip+=3;
+ }
+ ip += ipextra;
+ height--;
+ }
+}
+
+/*
+ * rfbTranslateWithSingleTableINto24 translates a rectangle of pixel data
+ * using a single lookup table.
+ */
+
+static void
+rfbTranslateWithSingleTableINto24 (char *table, rfbPixelFormat *in,
+ rfbPixelFormat *out,
+ char *iptr, char *optr,
+ int bytesBetweenInputLines,
+ int width, int height)
+{
+ IN_T *ip = (IN_T *)iptr;
+ CARD8 *op = (CARD8 *)optr;
+ int ipextra = bytesBetweenInputLines / sizeof(IN_T) - width;
+ CARD8 *opLineEnd;
+ CARD8 *t = (CARD8 *)table;
+
+ while (height > 0) {
+ opLineEnd = op + width * 3;
+
+ while (op < opLineEnd) {
+ memcpy(op,&t[3*(*(ip++))],3);
+ op += 3;
+ }
+
+ ip += ipextra;
+ height--;
+ }
+}
+
+
+/*
+ * rfbTranslateWithRGBTablesINto24 translates a rectangle of pixel data
+ * using three separate lookup tables for the red, green and blue values.
+ */
+
+static void
+rfbTranslateWithRGBTablesINto24 (char *table, rfbPixelFormat *in,
+ rfbPixelFormat *out,
+ char *iptr, char *optr,
+ int bytesBetweenInputLines,
+ int width, int height)
+{
+ IN_T *ip = (IN_T *)iptr;
+ CARD8 *op = (CARD8 *)optr;
+ int ipextra = bytesBetweenInputLines / sizeof(IN_T) - width;
+ CARD8 *opLineEnd;
+ CARD8 *redTable = (CARD8 *)table;
+ CARD8 *greenTable = redTable + 3*(in->redMax + 1);
+ CARD8 *blueTable = greenTable + 3*(in->greenMax + 1);
+ CARD32 outValue;
+
+ while (height > 0) {
+ opLineEnd = op+3*width;
+
+ while (op < opLineEnd) {
+ outValue = (redTable[(*ip >> in->redShift) & in->redMax] |
+ greenTable[(*ip >> in->greenShift) & in->greenMax] |
+ blueTable[(*ip >> in->blueShift) & in->blueMax]);
+ memcpy(op,&outValue,3);
+ op += 3;
+ ip++;
+ }
+ ip += ipextra;
+ height--;
+ }
+}
+
+#undef IN_T
+#undef OUT_T
+#undef rfbTranslateWithSingleTable24toOUT
+#undef rfbTranslateWithRGBTables24toOUT
+#undef rfbTranslateWithSingleTableINto24
+#undef rfbTranslateWithRGBTablesINto24
+
+#endif
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