added libvnc/ with RealVNC compatibility fix

[presencevnc] / libvnc / libvncserver / zrlepalettehelper.h

diff --git a/libvnc/libvncserver/zrlepalettehelper.h b/libvnc/libvncserver/zrlepalettehelper.h
new file mode 100644 (file)
index 0000000..e1213d1
--- /dev/null
+++ b/libvnc/libvncserver/zrlepalettehelper.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2002 RealVNC Ltd.  All Rights Reserved.
+ * Copyright (C) 2003 Sun Microsystems, Inc.
+ *
+ * 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.
+ */
+
+/*
+ * The PaletteHelper class helps us build up the palette from pixel data by
+ * storing a reverse index using a simple hash-table
+ */
+
+#ifndef __ZRLE_PALETTE_HELPER_H__
+#define __ZRLE_PALETTE_HELPER_H__
+
+#include "zrletypes.h"
+
+#define ZRLE_PALETTE_MAX_SIZE 127
+
+typedef struct {
+  zrle_U32  palette[ZRLE_PALETTE_MAX_SIZE];
+  zrle_U8   index[ZRLE_PALETTE_MAX_SIZE + 4096];
+  zrle_U32  key[ZRLE_PALETTE_MAX_SIZE + 4096];
+  int       size;
+} zrlePaletteHelper;
+
+void zrlePaletteHelperInit  (zrlePaletteHelper *helper);
+void zrlePaletteHelperInsert(zrlePaletteHelper *helper,
+                            zrle_U32           pix);
+int  zrlePaletteHelperLookup(zrlePaletteHelper *helper,
+                            zrle_U32           pix);
+
+#endif /* __ZRLE_PALETTE_HELPER_H__ */