diff --git a/common/rfb/ScaledPixelBuffer.cxx b/common/rfb/ScaledPixelBuffer.cxx
new file mode 100644
index 0000000..bf4612d
--- /dev/null
+++ b/common/rfb/ScaledPixelBuffer.cxx
@@ -0,0 +1,132 @@
+/* Copyright (C) 2005 TightVNC Team.  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.
+ */
+
+// -=- ScaledPixelBuffer.cxx
+
+#include <rfb/ScaledPixelBuffer.h>
+
+#include <math.h>
+#include <memory.h>
+
+using namespace rdr;
+using namespace rfb;
+
+ScaledPixelBuffer::ScaledPixelBuffer(U8 **src_data_, int src_width_,
+                                     int src_height_, int scale)
+  : bpp(32), scaled_data(0), scale_ratio(1), scale(100) {
+
+  setSourceBuffer(src_data_, src_width_, src_height_);
+}
+
+ScaledPixelBuffer::ScaledPixelBuffer() 
+  : src_data(0), src_width(0), src_height(0), scale_ratio(1), scale(100),
+    bpp(32), scaled_data(0) {
+}
+
+ScaledPixelBuffer::~ScaledPixelBuffer() {
+}
+
+void ScaledPixelBuffer::setSourceBuffer(U8 **src_data_, int w, int h) {
+  src_data = src_data_;
+  src_width  = w;
+  src_height = h;
+  calculateScaledBufferSize();
+  recreateScaledBuffer();
+}
+
+void ScaledPixelBuffer::setScale(int scale_) {
+  if (scale != scale_) {
+    scale = scale_;
+    scale_ratio = double(scale) / 100;
+    calculateScaledBufferSize();
+    recreateScaledBuffer();
+  }
+}
+
+void ScaledPixelBuffer::scaleRect(const Rect& r) {
+  static U8 *src_ptr, *ptr;
+  static U8 r0, r1, r2, r3;
+  static U8 g0, g1, g2, g3;
+  static U8 b0, b1, b2, b3;
+  static double c1_sub_dx, c1_sub_dy;
+  static double dx, dy;
+  static int i, j;
+  static Rect changed_rect;
+
+  // Calculate the changed pixel rect in the scaled image
+  changed_rect = calculateScaleBoundary(r);
+
+  // Scale the source rect to the destination image buffer using
+  // bilinear interplation
+  for (int y = changed_rect.tl.y; y < changed_rect.br.y; y++) {
+    j = (int)(dy = y / scale_ratio);
+    dy -= j;
+    c1_sub_dy = 1 - dy;
+
+    for (int x = changed_rect.tl.x; x < changed_rect.br.x; x++) {
+      ptr = &scaled_data[(x + y*scaled_width) * 4];
+
+      i = (int)(dx = x / scale_ratio);
+      dx -= i;
+      c1_sub_dx = 1 - dx;
+
+      src_ptr = &(*src_data)[(i + (j*src_width))*4];
+      b0 = *src_ptr; g0 = *(src_ptr+1); r0 = *(src_ptr+2);
+      if (i+1 < src_width) {
+        b1 = *(src_ptr+4); g1 = *(src_ptr+5); r1 = *(src_ptr+6);
+      } else {
+        b1 = b0; r1 = r0; g1 = g0;
+      }
+      if (j+1 < src_height) {
+        src_ptr += src_width * 4;
+        b3 = *src_ptr; g3 = *(src_ptr+1); r3 = *(src_ptr+2);
+      } else {
+        b3 = b0; r3 = r0; g3 = g0;
+      }
+      if ((i+1 < src_width) && (j+1 < src_height)) {
+        b2 = *(src_ptr+4); g2 = *(src_ptr+5); r2 = *(src_ptr+6);
+      } else if (i+1 >= src_width) {
+        b2 = b3; r2 = r3; g2 = g3;
+      } else {
+        b2 = b1; r2 = r1; g2 = g1;
+      }
+      *ptr++ = (U8)((b0*c1_sub_dx+b1*dx)*c1_sub_dy + (b3*c1_sub_dx+b2*dx)*dy);
+      *ptr++ = (U8)((g0*c1_sub_dx+g1*dx)*c1_sub_dy + (g3*c1_sub_dx+g2*dx)*dy);
+      *ptr   = (U8)((r0*c1_sub_dx+r1*dx)*c1_sub_dy + (r3*c1_sub_dx+r2*dx)*dy);
+    }
+  }
+}
+
+Rect ScaledPixelBuffer::calculateScaleBoundary(const Rect& r) {
+  static int x_start, y_start, x_end, y_end;
+  x_start = r.tl.x == 0 ? 0 : ceil((r.tl.x-1) * scale_ratio);
+  y_start = r.tl.y == 0 ? 0 : ceil((r.tl.y-1) * scale_ratio);
+  x_end = ceil(r.br.x * scale_ratio - 1); 
+  x_end = x_end < scaled_width ? x_end + 1 : scaled_width;
+  y_end = ceil(r.br.y * scale_ratio - 1);
+  y_end = y_end < scaled_height ? y_end + 1 : scaled_height;
+  return Rect(x_start, y_start, x_end, y_end);
+}
+
+void ScaledPixelBuffer::calculateScaledBufferSize() {
+  scaled_width  = (int)ceil(src_width  * scale_ratio);
+  scaled_height = (int)ceil(src_height * scale_ratio);
+}
+
+void ScaledPixelBuffer::recreateScaledBuffer() {
+}