diff --git a/framebuffer.cpp b/framebuffer.cpp
new file mode 100644
--- /dev/null
+++ b/framebuffer.cpp
@@ -0,0 +1,98 @@
+/*
+  Copyright © 2015 Hasan Yavuz Özderya
+
+  This file is part of serialplot.
+
+  serialplot 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 3 of the License, or
+  (at your option) any later version.
+
+  serialplot 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 serialplot.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "framebuffer.h"
+
+FrameBuffer::FrameBuffer(size_t size) :
+    data(size, 0.)
+{
+
+}
+
+void FrameBuffer::resize(size_t size)
+{
+    size_t old_size = this->size();
+    size_t new_size = size;
+
+    if (new_size < old_size)
+    {
+        data.remove(0, old_size - new_size);
+    }
+    else if (new_size > old_size)
+    {
+        // This is seriously inefficient!
+        for (size_t i = old_size; i < new_size; i++)
+        {
+            data.prepend(0);
+        }
+    }
+}
+
+void FrameBuffer::addSamples(QVector<double> samples)
+{
+    int offset = size() - samples.size();
+
+    if (offset < 0)
+    {
+        // new samples exceed the size of frame buffer
+        // excess part (from beginning) of the input will be ignored
+        for (unsigned int i = 0; i < size(); i++)
+        {
+            data[i] = samples[i - offset];
+        }
+    }
+    else if (offset == 0) // input is the same size as the framebuffer
+    {
+        data = samples;
+    }
+    else // regular case; input is smaller than framebuffer
+    {
+        // shift old samples
+        int shift = samples.size();
+        for (int i = 0; i < offset; i++)
+        {
+            data[i] = data[i + shift];
+        }
+        // place new samples
+        for (int i = 0; i < samples.size(); i++)
+        {
+            data[offset + i] = samples[i];
+        }
+    }
+}
+
+void FrameBuffer::clear()
+{
+    data.fill(0);
+}
+
+size_t FrameBuffer::size() const
+{
+    return (size_t) data.size();
+}
+
+QPointF FrameBuffer::sample(size_t i) const
+{
+    return QPointF(i, data[i]);
+}
+
+QRectF FrameBuffer::boundingRect() const
+{
+    return qwtBoundingRect(*this);
+}