Import X server from vnc-3.3.7.

[rdpsrv] / Xserver / programs / Xserver / hw / vnc / tabletranstemplate.c

diff --git a/Xserver/programs/Xserver/hw/vnc/tabletranstemplate.c b/Xserver/programs/Xserver/hw/vnc/tabletranstemplate.c
new file mode 100644 (file)
index 0000000..2481ee5
--- /dev/null
+++ b/Xserver/programs/Xserver/hw/vnc/tabletranstemplate.c
@@ -0,0 +1,115 @@
+/*
+ * 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.
+ */
+
+/*
+ *  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