UIconEdit and UIconDrawing

A C# application for opening and editing Windows .CUR and .ICO files, using the Windows Presentation Foundation for image processing. In my experiments, I have determined that it is also much faster than WPF's own IconBitmapDecoder class. The project is divided into three parts:

• The UIconEdit WPF graphical app.
• The UIconEdit.Core library, which allows icon creation and modification in code using WPF. It still uses System.Drawing in certain places.
• The UIconDrawing library, which allows icon creation and modification in code using System.Drawing.

UIconEdit app's functionality

To load an existing icon file (or image file) from the command line, just enter UIconEdit.exe [path-to-icon-file].

• Opening and saving icons and cursors.
• Importing images from external files.
• Exporting icon images as .PNG files.
• Duplicating an image with a different size and/or bit depth. You could just take a single 256x256 PNG image, and set 256x256, 48x48, 32x32, and 16x16 images, with 32-bit, 24-bit, and 8-bit color depths.
• Icon sizes up to 768x768 (the maximum as of Windows 10).
• Getting and setting a cursor's hotspot.
• Extracting icons from .DLL and .EXE files.
• Adding a "UIconEdit" option to file context menus in Windows.

UIconEdit.Core and UIconEdit.Drawing

All of the above (except for the context-menu thing), plus:

• The creation of animated cursors (.ANI files). This is a planned addition to UIconEdit itself.

UIconDrawing examples

This is a basic form of creating an icon:

using (Image image = Image.FromFile(@"C:\Path\To\Input.png")) //A 256x256 PNG file.
using (IconFile iconFile = new IconFile())
{
    iconFile.Entries.Add(new IconEntry(image, BitDepth.Bit32);
    iconFile.Entries.Add(new IconEntry(image, 48, 48, BitDepth.Bit32);
    iconFile.Entries.Add(new IconEntry(image, 32, 32, BitDepth.Bit32);
    iconFile.Entries.Add(new IconEntry(image, 16, 16, BitDepth.Bit32);

    iconFile.Save(@"C:\Path\To\Output.ico");
}

And this is the most basic form for extracting an image from a cursor file:

using (IconFile iconFile = IconFile.Load(@"C:\Path\To\Input.ico"))
{
    IconEntry entry = iconFile.Entries[0];
    Console.WriteLine(entry.Width);
    Console.WriteLine(entry.Height);

    // Use the GetCombinedAlpha() method to get an image with the alpha-mask
    // applied, if it wasn't already.
    using (Bitmap copy = entry.GetCombinedAlpha())
        copy.Save(@"C:\Path\To\Output.png", ImageFormat.Png);
}

UIconEdit.Core examples

UIconEdit.Core works the same way, but with BitmapSource objects.

//Creating
BitmapSource image = new BitmapImage(new Uri(@"C:\Path\To\Input.png")); //A 256x256 PNG file.
IconFile iconFile = new IconFile();

iconFile.Entries.Add(new IconEntry(image, BitDepth.Bit32);
iconFile.Entries.Add(new IconEntry(image, 48, 48, BitDepth.Bit32);
iconFile.Entries.Add(new IconEntry(image, 32, 32, BitDepth.Bit32);
iconFile.Entries.Add(new IconEntry(image, 16, 16, BitDepth.Bit32);

iconFile.Save("C:\Path\To\Output.ico");

//Loading
IconFile iconFile = IconFile.Load(@"C:\Path\To\Input.ico");

IconEntry entry = iconFile.Entries[0];
Console.WriteLine(entry.Width);
Console.WriteLine(entry.Height);

PngBitmapEncoder encoder = new PngBitmapEncoder;
encoder.Frames.Add(BitmapFrame.Create(entry.GetCombinedAlpha()));

using (FileStream fs = File.Create(@"C:\Path\To\Output.png"))
    encoder.Save(fs);

NOTICE

UIconEdit and UIconDrawing are currently in development. Parts of the API and functionality may be changed or removed without warning.