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

1 files changed, 110 insertions, 0 deletions

diff --git a/common/rfb/TightPalette.cxx b/common/rfb/TightPalette.cxx
new file mode 100644
index 00000000..c4ed04e4
--- /dev/null
+++ b/common/rfb/TightPalette.cxx
@@ -0,0 +1,110 @@
+/* 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 implementation.
+//
+
+#include <rfb/TightPalette.h>
+
+using namespace rfb;
+
+TightPalette::TightPalette(int maxColors)
+{
+  setMaxColors(maxColors);
+  reset();
+}
+
+void TightPalette::reset()
+{
+  m_numColors = 0;
+  memset(m_hash, 0, 256 * sizeof(TightColorList *));
+}
+
+void TightPalette::setMaxColors(int maxColors)
+{
+  m_maxColors = maxColors;
+  if (m_maxColors < 0) {
+    m_maxColors = 0;
+  } else if (m_maxColors > 254) {
+    m_maxColors = 254;
+  }
+}
+
+int TightPalette::insert(rdr::U32 rgb, int numPixels)
+{
+  TightColorList *pnode;
+  TightColorList *prev_pnode = NULL;
+  int hash_key, idx, new_idx, count;
+
+  hash_key = hashFunc(rgb);
+
+  pnode = m_hash[hash_key];
+
+  while (pnode != NULL) {
+    if (pnode->rgb == rgb) {
+      // Such palette entry already exists.
+      new_idx = idx = pnode->idx;
+      count = m_entry[idx].numPixels + numPixels;
+      if (new_idx && m_entry[new_idx-1].numPixels < count) {
+        do {
+          m_entry[new_idx] = m_entry[new_idx-1];
+          m_entry[new_idx].listNode->idx = new_idx;
+          new_idx--;
+        }
+        while (new_idx && m_entry[new_idx-1].numPixels < count);
+
+        m_entry[new_idx].listNode = pnode;
+        pnode->idx = new_idx;
+      }
+      m_entry[new_idx].numPixels = count;
+      return m_numColors;
+    }
+    prev_pnode = pnode;
+    pnode = pnode->next;
+  }
+
+  // Check if the palette is full.
+  if (m_numColors == 256 || m_numColors == m_maxColors) {
+    m_numColors = 0;
+    return 0;
+  }
+
+  // Move palette entries with lesser pixel counts.
+  for ( idx = m_numColors;
+        idx > 0 && m_entry[idx-1].numPixels < numPixels;
+        idx-- ) {
+    m_entry[idx] = m_entry[idx-1];
+    m_entry[idx].listNode->idx = idx;
+  }
+
+  // Add new palette entry into the freed slot.
+  pnode = &m_list[m_numColors];
+  if (prev_pnode != NULL) {
+    prev_pnode->next = pnode;
+  } else {
+    m_hash[hash_key] = pnode;
+  }
+  pnode->next = NULL;
+  pnode->idx = idx;
+  pnode->rgb = rgb;
+  m_entry[idx].listNode = pnode;
+  m_entry[idx].numPixels = numPixels;
+
+  return ++m_numColors;
+}