protected virtual Bitmap OnNonLinearTransfromNeeded()
{
Bitmap bmp = null;
if (CtrlBmp == null)
{
return(null);
}
try
{
bmp = new Bitmap(Width, Height);
const int bytesPerPixel = 4;
PixelFormat pxf = PixelFormat.Format32bppArgb;
Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
BitmapData bmpData = bmp.LockBits(rect, ImageLockMode.ReadWrite, pxf);
IntPtr ptr = bmpData.Scan0;
int numBytes = bmp.Width * bmp.Height * bytesPerPixel;
byte[] argbValues = new byte[numBytes];
Marshal.Copy(ptr, argbValues, 0, numBytes);
var e = new NonLinearTransfromNeededEventArg()
{
CurrentTime = CurrentTime, ClientRectangle = ClientRectangle, Pixels = argbValues, Stride = bmpData.Stride, SourcePixels = CtrlPixels, SourceClientRectangle = new Rectangle(Padding.Left, Padding.Top, DecoratedControl.Width, DecoratedControl.Height), SourceStride = CtrlStride
};
try
{
if (NonLinearTransfromNeeded != null)
{
NonLinearTransfromNeeded(this, e);
}
else
{
e.UseDefaultTransform = true;
}
if (e.UseDefaultTransform)
{
switch (DecorationType)
{
case DecorationType.BottomMirror: TransfromHelper.DoBottomMirror(e); break;
}
}
}catch {}
Marshal.Copy(argbValues, 0, ptr, numBytes);
bmp.UnlockBits(bmpData);
}
catch
{
}
return(bmp);
}
