public virtual void OnPaint(PaintElementType type, Rect dirtyRect, IntPtr buffer, int width, int height)
{
if (type == PaintElementType.View)
{
m_Lock.EnterUpgradeableReadLock();
try
{
if (!Buffer.IsAllocated ||
width != Width ||
height != Height)
{
m_Lock.EnterWriteLock();
try
{
Width = width;
Height = height;
BufferSize = width * height * 4;
if (Buffer.IsAllocated)
{
Buffer.Free();
}
Buffer = GCHandle.Alloc(new byte[BufferSize], GCHandleType.Pinned);
}
finally
{
m_Lock.ExitWriteLock();
}
}
WinApi.CopyMemory(Buffer.AddrOfPinnedObject(), buffer, (uint)BufferSize);
}
finally
{
m_Lock.ExitUpgradeableReadLock();
}
}
}