Import X server from vnc-3.3.7.

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

diff --git a/Xserver/programs/Xserver/hw/vnc/tableinitcmtemplate.c b/Xserver/programs/Xserver/hw/vnc/tableinitcmtemplate.c
new file mode 100644 (file)
index 0000000..a148f2c
--- /dev/null
+++ b/Xserver/programs/Xserver/hw/vnc/tableinitcmtemplate.c
@@ -0,0 +1,82 @@
+/*
+ * tableinitcmtemplate.c - template for initialising lookup tables for
+ * translation from a colour map to true colour.
+ *
+ * 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 a function which allocates an
+ * appropriately sized lookup table and initialises it.
+ *
+ * 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(OUT)
+#error "This file shouldn't be compiled."
+#error "It is included as part of translate.c"
+#endif
+
+#define OUT_T CONCAT2E(CARD,OUT)
+#define SwapOUT(x) CONCAT2E(Swap,OUT(x))
+#define rfbInitColourMapSingleTableOUT \
+                               CONCAT2E(rfbInitColourMapSingleTable,OUT)
+
+static void
+rfbInitColourMapSingleTableOUT (char **table, rfbPixelFormat *in,
+                               rfbPixelFormat *out)
+{
+    int i, r, g, b;
+    OUT_T *t;
+    EntryPtr pent;
+    int nEntries = 1 << in->bitsPerPixel;
+
+    if (*table) free(*table);
+    *table = (char *)malloc(nEntries * sizeof(OUT_T));
+    t = (OUT_T *)*table;
+
+    pent = (EntryPtr)&rfbInstalledColormap->red[0];
+
+    for (i = 0; i < nEntries; i++) {
+       if (pent->fShared) {
+           r = pent->co.shco.red->color;
+           g = pent->co.shco.green->color;
+           b = pent->co.shco.blue->color;
+       } else {
+           r = pent->co.local.red;
+           g = pent->co.local.green;
+           b = pent->co.local.blue;
+       }
+       t[i] = ((((r * out->redMax + 32767) / 65535) << out->redShift) |
+               (((g * out->greenMax + 32767) / 65535) << out->greenShift) |
+               (((b * out->blueMax + 32767) / 65535) << out->blueShift));
+#if (OUT != 8)
+       if (out->bigEndian != in->bigEndian) {
+           t[i] = SwapOUT(t[i]);
+       }
+#endif
+       pent++;
+    }
+}
+
+#undef OUT_T
+#undef SwapOUT
+#undef rfbInitColourMapSingleTableOUT