SimpleJpegDecoder 0.5.0

.NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.7.2 This package targets .NET Framework 4.7.2. The package is compatible with this framework or higher. 
dotnet add package SimpleJpegDecoder --version 0.5.0
                    


                    

                
NuGet\Install-Package SimpleJpegDecoder -Version 0.5.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="SimpleJpegDecoder" Version="0.5.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="SimpleJpegDecoder" Version="0.5.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="SimpleJpegDecoder" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add SimpleJpegDecoder --version 0.5.0
                    


                    

                
#r "nuget: SimpleJpegDecoder, 0.5.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package SimpleJpegDecoder@0.5.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=SimpleJpegDecoder&version=0.5.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=SimpleJpegDecoder&version=0.5.0
                    


                            Install as a Cake Tool

SimpleJpegDecoder

A lightweight C# JPEG decoder targeting Meadow and other memory-constrained platforms. Works on any modern C# platform supporting .NET Standard 2.0 or .NET Framework 4.7.2.

NuGet: https://www.nuget.org/packages/SimpleJpegDecoder/

Features

  • Decodes baseline JPEG (no progressive or lossless)
  • Supports 8-bit grayscale and YCbCr (RGB) images
  • Supports any power-of-two chroma subsampling ratio
  • Supports restart markers
  • Implements IDisposable for deterministic release of unmanaged memory
  • Zero-allocation decode path for repeated use (e.g. display refresh on Meadow)

Usage

Basic decode from byte array

var decoder = new JpegDecoder();
byte[] pixels = decoder.DecodeJpeg(jpegBytes);
// decoder.Width, decoder.Height, decoder.IsColor are now populated

Decode from a Stream

using var stream = File.OpenRead("image.jpg");
byte[] pixels = decoder.DecodeJpeg(stream);

Pre-allocate the output buffer once and reuse it across frames to avoid GC pressure:

var decoder = new JpegDecoder();

// decode once to find dimensions
decoder.DecodeJpeg(firstFrame);
var outputBuffer = new byte[decoder.Width * decoder.Height * 3];

// reuse buffer for every subsequent frame — no heap allocation
while (true)
{
    decoder.DecodeJpeg(GetNextFrame(), outputBuffer);
    display.Draw(outputBuffer);
}

Cleanup

JpegDecoder holds unmanaged memory internally. Use it in a using block or call Dispose() when done:

using (var decoder = new JpegDecoder())
{
    var pixels = decoder.DecodeJpeg(jpegBytes);
}

Limitations

  • Baseline JPEG only — no progressive, lossless, CMYK, or 16-bit
  • Minimum image size of 8×8 pixels (NanoJpeg constraint with 4:2:0 chroma subsampling)

Credits

Built on NanoJpeg.NET by Johannes Bildstein — a C# port of NanoJPEG by Martin J. Fiedler.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 is compatible.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

  • .NETFramework 4.7.2

    • No dependencies.

  • .NETStandard 2.0

    • No dependencies.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on SimpleJpegDecoder:

Package Downloads
Chibi.Ui

Package Description

GitHub repositories (1)

Showing the top 1 popular GitHub repositories that depend on SimpleJpegDecoder:

Repository Stars
WildernessLabs/Meadow.Foundation
Unified driver and library framework for Meadow applications.
Version Downloads Last Updated
0.5.0 90 3/15/2026
0.4.0 9,242 7/25/2021
0.3.0 902 6/2/2021
0.2.0 1,203 8/18/2020
0.1.1 1,335 1/4/2020
0.1.0 793 1/4/2020

Updated to latest NanoJpeg.NET code with improved performance