public override Image ApplyEffect(Image img)
{
ColorMatrix matrix = ColorMatrixMgr.IdentityMatrix;
matrix[4, 0] = matrix[4, 1] = matrix[4, 2] = -1.0f;
using (Image blackImage = ColorMatrixMgr.ApplyColorMatrix(img, matrix))
using (Image shadow = Blur.ApplyBlur((Bitmap)blackImage, radius, true))
using (Image shadow2 = ColorMatrixMgr.ApplyColorMatrix(shadow, ColorMatrixMgr.Alpha(transparency, 0)))
{
Bitmap result = new Bitmap(shadow.Width + Math.Abs(offsetX), shadow.Height + Math.Abs(offsetY));
using (Graphics g = Graphics.FromImage(result))
{
Rectangle shadowRect = new Rectangle(0, 0, shadow.Width, shadow.Height);
Rectangle imageRect = new Rectangle(radius, radius, img.Width, img.Height);
if (offsetX < 0)
{
imageRect.X += -offsetX + Math.Min(radius, -offsetX);
}
else
{
imageRect.X = Math.Max(0, radius - offsetX);
shadowRect.X = offsetX;
}
if (offsetY < 0)
{
imageRect.Y += -offsetY + Math.Min(radius, -offsetX);
}
else
{
imageRect.Y = Math.Max(0, radius - offsetY);
shadowRect.Y = offsetY;
}
g.DrawImage(shadow2, shadowRect);
g.DrawImage(img, imageRect);
}
return(result);
}
}
public override Image ApplyEffect(Image img)
{
return(ColorMatrixMgr.ApplyColorMatrix(img, ColorMatrixMgr.Alpha(percentage, addition)));
}