blurhash.uwp's Introduction

Blurhash.UWP

A Blurhash implementation based on blurhash.net for Universal Windows Platform's native SoftwareBitmap.

Allows to encode a SoftwareBitmap into a blurhash and decode a blurhash into SoftwareBitmap again. Several portions of the code are directly copy-pasted from the System.Drawing implementation.

Available for x86, x64, ARM and ARM64. Requires .NET Standard 1.6 support, thus Windows 10 16299 (Fall Creators Update) or later is required.

Example usage

Displaying a placeholder for an image in Image control

using Blurhash.UWP;

// ...

var bitmap = Blurhasher.Decode("LEHV6nWB2yk8pyo0adR*.7kCMdnj", 269, 173);

var source = new SoftwareBitmapSource();
await source.SetBitmapAsync(bitmap);

// Set the source of the Image control
image1.Source = source;

Calculating the blurhash for an image loaded from file

var fileOpenPicker = new FileOpenPicker();
fileOpenPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
fileOpenPicker.FileTypeFilter.Add(".jpg");
fileOpenPicker.ViewMode = PickerViewMode.Thumbnail;

var inputFile = await fileOpenPicker.PickSingleFileAsync();

if (inputFile == null)
{
    return;
}
else
{
    SoftwareBitmap softwareBitmap;

    using (IRandomAccessStream stream = await inputFile.OpenAsync(FileAccessMode.Read))
    {
        var decoder = await BitmapDecoder.CreateAsync(stream);

        softwareBitmap = await decoder.GetSoftwareBitmapAsync();
        
        var blurhash = Blurhasher.Encode(softwareBitmap, 4, 3);
    }
}

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