TYoshimura.PNGReadWrite 5.0.0

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. 
dotnet add package TYoshimura.PNGReadWrite --version 5.0.0
                    


                    

                
NuGet\Install-Package TYoshimura.PNGReadWrite -Version 5.0.0
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="TYoshimura.PNGReadWrite" Version="5.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="TYoshimura.PNGReadWrite" Version="5.0.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="TYoshimura.PNGReadWrite" />
                    


                            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 TYoshimura.PNGReadWrite --version 5.0.0
                    


                    

                
#r "nuget: TYoshimura.PNGReadWrite, 5.0.0"
#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 TYoshimura.PNGReadWrite@5.0.0
#: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=TYoshimura.PNGReadWrite&version=5.0.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=TYoshimura.PNGReadWrite&version=5.0.0
                    


                            Install as a Cake Tool

PNGReadWrite

PNG file IO - Deep color compatible

PNG Suite passed

Requirement

.NET 8.0 - windows

Install

Download DLL
Download Nuget

  • Nuget include: System.Drawing.Common
  • Enable WPF (*.csproj)
<PropertyGroup>
    <UseWPF>true</UseWPF>
</PropertyGroup>

Usage

Create

const int width = 255, height = 128;

PNGPixel[,] arr = new PNGPixel[width, height];

for (int x, y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
        arr[x, y] = new PNGPixel((ushort)(x * 257), (ushort)(y * 257), 0);
    }
}

PNGPixelArray png = new(arr);

PNGPixelArray png_copy = png[10..^20, 20..^30];

png_copy.Write(dirpath + "pngcopy_regionclip.png");

Open

PNGPixelArray png = PNGPixelArray.Read(filepath);

GDI+(Bitmap) <-> PNGPixelArray

Bitmap bitmap = new(32, 32);
using (Graphics g = Graphics.FromImage(bitmap)) {
    using Pen pen = new(new SolidBrush(Color.Black));

    g.Clear(Color.Gray);
    g.DrawLine(pen, new Point(0, 0), new Point(31, 31));
}

PNGPixelArray png_black = bitmap;
png_black.Write(dirpath + "gdi_test.png");

PNGPixelArray png_read = PNGPixelArray.Read(dirpath + "gdi_test.png");

bitmap = (Bitmap)png_read;
using (Graphics g = Graphics.FromImage(bitmap)) {
    using Pen pen = new(new SolidBrush(Color.White));

    g.DrawLine(pen, new Point(0, 31), new Point(31, 0));
}

PNGPixelArray png_cross = bitmap;

png_cross.Write(dirpath + "gdi_test2.png");

Assert.AreEqual(PNGPixel.Black, png_cross[0, 0]);
Assert.AreEqual(PNGPixel.Black, png_cross[^1, ^1]);
Assert.AreEqual(PNGPixel.White, png_cross[0, ^1]);
Assert.AreEqual(PNGPixel.White, png_cross[^1, 0]);

WPF(BitmapSource) <-> PNGPixelArray

WriteableBitmap bitmapsource = new(32, 32, 96d, 96d, PixelFormats.Rgba64, null);

PNGPixelArray png = bitmapsource;

png.Write(dirpath + "wic_test.png");

png.Metadata.Dpi = (32, 32);

bitmapsource = new WriteableBitmap((BitmapSource)png);

Assert.AreEqual(32, bitmapsource.DpiX);

See also: Tests

Licence

MIT

Author

T.Yoshimura

Product Compatible and additional computed target framework versions.
.NET net8.0 is compatible.  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. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
5.0.0 173 4/10/2025
4.2.0 156 1/20/2024
4.1.1 316 2/8/2023
4.1.0 302 2/7/2023
4.0.0 318 2/3/2023

fix: read