Migrating to new directory structure adopted from the RealVNC's source tree. More changes will follow.
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@589 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/rfb/TightPalette.h b/common/rfb/TightPalette.h
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+++ b/common/rfb/TightPalette.h
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+/* Copyright (C) 2000-2005 Constantin Kaplinsky. 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.
+ */
+
+//
+// TightPalette class is a container for ordered color values. Colors
+// are keys in a hash where values are frequency counts. Also, there
+// is a list where colors are always sorted by these counts (more
+// frequent first).
+//
+
+#ifndef __RFB_TIGHTPALETTE_H__
+#define __RFB_TIGHTPALETTE_H__
+
+#include <string.h>
+#include <rdr/types.h>
+
+namespace rfb {
+
+ struct TightColorList {
+ TightColorList *next;
+ int idx;
+ rdr::U32 rgb;
+ };
+
+ struct TightPaletteEntry {
+ TightColorList *listNode;
+ int numPixels;
+ };
+
+ class TightPalette {
+
+ protected:
+
+ // FIXME: Bigger hash table? Better hash function?
+ inline static int hashFunc(rdr::U32 rgb) {
+ return (rgb ^ (rgb >> 13)) & 0xFF;
+ }
+
+ public:
+
+ TightPalette(int maxColors = 254);
+
+ //
+ // Re-initialize the object. This does not change maximum number
+ // of colors.
+ //
+ void reset();
+
+ //
+ // Set limit on the number of colors in the palette. Note that
+ // this value cannot exceed 254.
+ //
+ void setMaxColors(int maxColors);
+
+ //
+ // Insert new color into the palette, or increment its counter if
+ // the color is already there. Returns new number of colors, or
+ // zero if the palette is full. If the palette becomes full, it
+ // reports zero colors and cannot be used any more without calling
+ // reset().
+ //
+ int insert(rdr::U32 rgb, int numPixels);
+
+ //
+ // Return number of colors in the palette.
+ //
+ inline int getNumColors() const {
+ return m_numColors;
+ }
+
+ //
+ // Return the color specified by its index in the palette.
+ //
+ inline rdr::U32 getEntry(int i) const {
+ return (i < m_numColors) ? m_entry[i].listNode->rgb : (rdr::U32)-1;
+ }
+
+ //
+ // Return the pixel counter of the color specified by its index.
+ //
+ inline int getCount(int i) const {
+ return (i < m_numColors) ? m_entry[i].numPixels : 0;
+ }
+
+ //
+ // Return the index of a specified color.
+ //
+ inline rdr::U8 getIndex(rdr::U32 rgb) const {
+ TightColorList *pnode = m_hash[hashFunc(rgb)];
+ while (pnode != NULL) {
+ if (pnode->rgb == rgb) {
+ return (rdr::U8)pnode->idx;
+ }
+ pnode = pnode->next;
+ }
+ return 0xFF; // no such color
+ }
+
+ protected:
+
+ int m_maxColors;
+ int m_numColors;
+
+ TightPaletteEntry m_entry[256];
+ TightColorList *m_hash[256];
+ TightColorList m_list[256];
+
+ };
+
+} // namespace rfb
+
+#endif // __RFB_TIGHTPALETTE_H__