Ikst.ImageResizeWithSkia 0.0.12

.NET 6.0 .NET Standard 2.0
There is a newer version of this package available.
See the version list below for details. 
dotnet add package Ikst.ImageResizeWithSkia --version 0.0.12
NuGet\Install-Package Ikst.ImageResizeWithSkia -Version 0.0.12
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="Ikst.ImageResizeWithSkia" Version="0.0.12" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add Ikst.ImageResizeWithSkia --version 0.0.12
#r "nuget: Ikst.ImageResizeWithSkia, 0.0.12"
#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. 
// Install Ikst.ImageResizeWithSkia as a Cake Addin
#addin nuget:?package=Ikst.ImageResizeWithSkia&version=0.0.12

// Install Ikst.ImageResizeWithSkia as a Cake Tool
#tool nuget:?package=Ikst.ImageResizeWithSkia&version=0.0.12

画像の縦横比を崩さずにリサイズ出来るライブラリです。
画像変換処理にはSkiaSharpを利用します。

usage

ImageResizeクラスの静的メソッドResizeを呼び出します。

byte[] bytes = ImageResize.Resize("ImageFilePath", 640, 480, ResizeMode.Default);

他にもいくつかのオーバーロードがあります。

byte[] bytes1 = ImageResize.Resize(stream, 640, 480, ResizeMode.Uniform, SKColors.Blue);
byte[] bytes2 = ImageResize.Resize(byteArray, 640, 480, ResizeMode.UniformToFill, SKEncodedImageFormat.Png);
byte[] bytes3 = ImageResize.Resize("ImageFilePath", 640, 480, ResizeMode.Default, SKColors.Blue, SKEncodedImageFormat.Jpeg);
byte[] bytes4 = ImageResize.Resize(stream, 640, 480, ResizeMode.Uniform, SKColors.Blue, SKEncodedImageFormat.Webp, 100);
byte[] bytes5 = ImageResize.Resize(byteArray, 640, 480, ResizeMode.UniformToFill, SKColors.Blue, SKEncodedImageFormat.Webp, 100, SKFilterQuality.High);

Resizeメソッドのパラメータは以下のとおりです。

args type description
source string<br>byte[]<br>stream<br>SKCodec 変換元画像を指定します。
width int 横幅。<br>0を指定した場合、heightを基準に縦横比が変わらないようにします。
height int 縦幅。<br>0を指定した場合、widthを基準に縦横比が変わらないようにします。
mode ResizeMode リサイズモード。詳細は以下。
backColor SKColor 背景色。Uniformで余白ができる場合に適用されます。
imgFmt SKEncodedImageFormat 出力する画像フォーマット。<br>SkiaSharpの都合上、jpeg, png, webpのみ指定できます。
quality int 画像出力時の品質。0～100で指定します。<br>デフォルトは90です。
fq SKFilterQuality SkiaSharpのリサイズメソッドの処理品質。

ResizeMode

各モードごとの挙動は以下です。
Original

この300(w)x300(h) の画像を 200(w)x100(h) にリサイズした画像をSampleに示します。

ResizeMode Description Sample
Default 何もしません。指定されたサイズ通りに画像の伸縮が発生します。 Default
Uniform 縦横比を維持したままリサイズします。<br>元画像と縦横比が異なる場合は余白が出来ます。 Uniform
UniformToFill 縦横比を維持したままリサイズします。<br>元画像と縦横比が異なる場合は一部が欠落します。 UniformToFill

※WPF/XAMLのStretch列挙型をイメージするとわかりやすいかも知れません。

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  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. 
.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 was computed.  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.

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
0.0.16 166 9/9/2023
0.0.15 121 8/16/2023
0.0.14 129 8/16/2023
0.0.13 440 9/25/2022
0.0.12 437 9/25/2022
0.0.11 416 9/24/2022
0.0.10 420 9/24/2022
0.0.9 398 9/24/2022
0.0.8 384 9/24/2022
0.0.7 373 9/24/2022
0.0.6 416 9/23/2022
0.0.5 404 9/23/2022
0.0.4 410 9/23/2022
0.0.3 390 9/23/2022
0.0.2 428 9/23/2022
0.0.1 383 9/23/2022

Please check the following.
https://github.com/ikst/Ikst.ImageResizeWithSkia/blob/master/README.md