This plugin will enable you to manipulate(resize,crop,rotate) and filter(monochrome) a image(png,jpg).
- Available on NuGet: https://www.nuget.org/packages/Xamarin.Plugin.ImageEdit/
- Install into your .NETStandard project and each platform project.
Install-Package Xamarin.Plugin.ImageEditPlatform Support
| Platform | Supported | Version |
|---|---|---|
| Xamarin.iOS | Yes | iOS 9 |
| Xamarin.Android | Yes | API 22 |
| Windows 10 UWP | No | |
| Xamarin.Mac | No |
Image crop and rotate and resize and get png data.
using (var image = await CrossImageEdit.Current.CreateImageAsync(imageByteArray)) {
var croped = await Task.Run(() =>
image.Crop(10, 20, 250, 100)
.Rotate(180)
.Resize(100, 0)
.ToPng()
);
}//View model constructor
public ViewModel(IImageEdit imageEdit){
using (var image = await imageEdit.CreateImageAsync(imageByteArray)) {
var croped = await Task.Run(() =>
image.Crop(10, 20, 250, 100)
.Rotate(180)
.Resize(100, 0)
.ToPng()
);
}
}
//on platform
public class iOSInitializer : IPlatformInitializer
{
public void RegisterTypes(IUnityContainer container)
{
container.RegisterType<IImageEdit,ImageEdit>();
}
}https://github.com/muak/PanPinchSample
movie https://twitter.com/muak_x/status/837266085405573120
//from byte[]
var image = await CrossImageEdit.Current.CreateImageAsync(imageByteArray);//from stream
var image = await CrossImageEdit.Current.CreateImageAsync(imageStream);It is able to manipulate a image using this object.
var width = 200;
var height = 150;
image.Resize(width, height);
image.Resize(width, 0); //auto height
image.Resize(0, height); //auto width
image.Resize(50); //specify max length of long side. other side auto size.var x = 10;
var y = 10;
var width = 50;
var height = 50;
image.Crop(10, 10, 50, 50);var degree = 90; // 0-360;
image.Rotate(degree);The image will convert to monochrome.
image.ToMonochrome();var pngBytes = image.ToPng();var jpgBytes = image.ToJpeg(90); // quality(0-100)Get image ARGB infomation.
for example when 0xFF00F090
| A | R | G | B |
|---|---|---|---|
| FF | 00 | F0 | 90 |
var pixels = image.ToArgbPixels();
var pixel = pixels[10];
var r = pixel & 0x00FF0000 >> 16; //Get R
var g = pixel & 0x0000FF00 >> 8; //Get G
var b = pixel & 0x000000FF; //Get BGet native image on platform. if platform is iOS, return UIImage; otherwise return Bitmap.
MIT Licensed.