public static void CreateShadowImage(string fileName, int swidth)
{
Int32 shadowwidth = swidth;
Int32 borderwidth = 0;
Int32 margin = shadowwidth;
Int32 shadowdir = 0;
Double shadowtrans = 0.0;
Color bkcolor = Color.FromArgb(255, 255, 255);
Color shadowcolor = Color.FromArgb(0, 0, 0);
Color bordercolor = Color.FromArgb(0, 0, 0);
Boolean softshadow = true;
String outputfile = fileName;
String inputfile = fileName;
FastBitmap tmp, bmp;
if (System.IO.File.Exists(inputfile))
{
tmp = new FastBitmap(inputfile);
}
else
{
Console.WriteLine("Error: Could not find file '{0}'", inputfile);
return;
}
bmp = new FastBitmap(tmp.Width + borderwidth * 2, tmp.Height + borderwidth * 2, PixelFormat.Format32bppArgb);
// add border if necessary
if (borderwidth > 0)
{
SolidBrush br = new SolidBrush(bordercolor);
Graphics g = Graphics.FromImage(bmp._bitmap);
g.FillRectangle(br, 0, 0, borderwidth * 2 + tmp.Width, borderwidth * 2 + tmp.Height);
g.Dispose();
br.Dispose();
}
tmp.CopyTo(bmp, borderwidth, borderwidth, 0, 0, tmp.Width, tmp.Height);
tmp.Dispose();
// create image
Int32 width = bmp.Width + shadowwidth + margin * 2;
Int32 height = bmp.Height + shadowwidth + margin * 2;
LayeredImage image = new LayeredImage(width, height);
Int32 shadowx = 0, shadowy = 0, imgx = 0, imgy = 0;
if (softshadow)
{
switch (shadowdir)
{
case 0:
{
shadowx = margin - shadowwidth / 2;
shadowy = margin - shadowwidth / 2;
imgx = margin;
imgy = margin;
break;
}
case 1:
{
shadowx = margin + shadowwidth - 3 * (shadowwidth / 2);
shadowy = margin - shadowwidth / 2;
imgx = margin + shadowwidth;
imgy = margin;
break;
}
case 2:
{
shadowx = margin + shadowwidth - 3 * (shadowwidth / 2);
shadowy = margin + shadowwidth - 3 * (shadowwidth / 2);
imgx = margin + shadowwidth;
imgy = margin + shadowwidth;
break;
}
case 3:
{
shadowx = margin - shadowwidth / 2;
shadowy = margin + shadowwidth - 3 * (shadowwidth / 2);
imgx = margin;
imgy = margin + shadowwidth;
break;
}
}
}
else
{
switch (shadowdir)
{
case 0:
{
shadowx = margin;
shadowy = margin;
imgx = margin;
imgy = margin;
break;
}
case 1:
{
shadowx = margin - shadowwidth;
shadowy = margin;
imgx = margin + shadowwidth;
imgy = margin;
break;
}
case 2:
{
shadowx = margin - shadowwidth;
shadowy = margin - shadowwidth;
imgx = margin + shadowwidth;
imgy = margin + shadowwidth;
break;
}
case 3:
{
shadowx = margin;
shadowy = margin - shadowwidth;
imgx = margin;
imgy = margin + shadowwidth;
break;
}
}
}
// background
Layer bg = image.Layers.Add();
bg.Clear(bkcolor);
// shadow -- layer must be larger because of blur
Layer shadow = image.Layers.Add(width + shadowwidth, height + shadowwidth);
SolidBrush brush = new SolidBrush(shadowcolor);
shadow.FillRectangle(shadowwidth, shadowwidth, bmp.Width, bmp.Height, brush);
if (softshadow)
{
shadow.Blur(shadowwidth, shadowwidth);
}
brush.Dispose();
shadow.OffsetX = shadowx;
shadow.OffsetY = shadowy;
shadow.Opacity = 1.0 - shadowtrans;
// image
Layer img = image.Layers.Add(bmp);
img.OffsetX = imgx;
img.OffsetY = imgy;
// result
FastBitmap result = image.Flatten();
// save
String filename = outputfile != "" ? outputfile : inputfile;
String ext = Path.GetExtension(filename);
if (ext == "")
{
ext = ".bmp";
}
ext = ext.ToLower();
ImageFormat imgf = ImageFormat.Bmp;
switch (ext)
{
case ".bmp":
ext = ".bmp";
imgf = ImageFormat.Bmp;
break;
case ".jpg":
ext = ".jpg";
imgf = ImageFormat.Jpeg;
break;
case ".jpeg":
ext = ".jpeg";
imgf = ImageFormat.Jpeg;
break;
case ".png":
ext = ".png";
imgf = ImageFormat.Png;
break;
case ".gif":
ext = ".gif";
imgf = ImageFormat.Gif;
break;
default:
ext = ".bmp";
imgf = ImageFormat.Bmp;
break;
}
result.Save(filename, imgf);
}
public Layers(LayeredImage image)
{
_image = image;
}