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Crop APNG via C# Cloud API

Crop APNG using native .NET Cloud APIs without needing any image editor or 3rd-party libraries.

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How to Crop APNG Using C# Cloud API

In order to process images, we’ll use Aspose.Imaging.Cloud for .NET API which is a feature-rich, powerful and easy to use image manipulation and conversion API for C# platform. Open NuGet package manager, search for Aspose.Imaging-Cloud and install. You may also use the following command from the Package Manager Console.

Package Manager Console Command


PM> Install-Package Aspose.Imaging-Cloud

Steps to Crop APNG via C# Cloud API

Developers can easily load & crop APNG files in just a few lines of code.

  • Load APNG file as stream
  • Create & set the instance of CreateCroppedImageRequest
  • Set start position and crop area size
  • Call the CreateCroppedImage method
  • Get cropped image from response stream

System Requirements

Aspose.Imaging Cloud for .NET is supported on all major operating systems. Just make sure that you have the following prerequisites.

  • Microsoft Windows or a compatible OS with .NET Framework, .NET Core, Windows Application, ASP.NET Web Application.
  • Development environment like Microsoft Visual Studio.
  • Aspose.Imaging Cloud for .NET referenced in your project.
 

Crop APNG - Cloud

using System;
using System.IO;
using Aspose.Imaging.Cloud.Sdk.Api;
using Aspose.Imaging.Cloud.Sdk.Model;
using Aspose.Imaging.Cloud.Sdk.Model.Requests;
string ImageFileName = "example_image.apng";
string ImagesFolder = "ExampleImages";
string CloudFolder = "CloudImages";
string OutputFolder = "Output";
// Get ClientId and ClientSecret from https://dashboard.aspose.cloud/
// or use on-premise version (https://docs.aspose.cloud/imaging/getting-started/how-to-run-docker-container/)
var api = new ImagingApi(clientSecret, clientId, "https://api.aspose.cloud");
/// <summary>
/// Crop an image from cloud storage.
/// </summary>
public void CropImageFromStorage()
{
// Upload image to cloud storage
using (var localInputImage = File.OpenRead(Path.Combine(ImagesFolder, ImageFileName)))
{
var uploadFileRequest = new UploadFileRequest(Path.Combine(CloudFolder, imageName), image);
var result = api.UploadFile(uploadFileRequest);
if (result.Errors?.Count > 0)
throw new Exception($"Uploading errors count: {result.Errors.Count}");
}
// Please refer to https://docs.aspose.cloud/imaging/supported-file-formats/#crop
// for possible formats
var format = "apng"; // Resulting image format.
int? x = 10;
int? y = 10;
int? width = 100;
int? height = 150;
var folder = CloudFolder; // Input file is saved at the desired folder in the storage
string storage = null; // We are using default Cloud Storage
var request = new CropImageRequest(SampleImageFileName, x, y, width, height, format, folder, storage);
using (var updatedImage = api.CropImage(request))
{
// Save the image file to output folder
var croppedImageName = Path.ChangeExtension(ImageFileName, "apng")
var path = Path.GetFullPath(Path.Combine(OutputFolder, croppedImageName));
using (var fileStream = File.Create(path))
{
updatedImage.Seek(0, SeekOrigin.Begin);
updatedImage.CopyTo(fileStream);
}
}
}
/// <summary>
/// Crop an image. Image data is passed in a request stream.
/// </summary>
public void CreateCroppedImageFromRequest()
{
using (var inputImageStream = File.OpenRead(Path.Combine(ImagesFolder, ImageFileName)))
{
// Please refer to https://docs.aspose.cloud/imaging/supported-file-formats/#crop
// for possible formats
var format = "apng";
int? x = 10;
int? y = 10;
int? width = 100;
int? height = 150;
string storage = null; // We are using default Cloud Storage
string outPath = null; // Path to updated file (if this is empty, response contains streamed image)
var request = new CreateCroppedImageRequest(inputImageStream, x, y, width, height, format, outPath, storage);
using (var updatedImage = api.CreateCroppedImage(request))
{
// Save the image file to output folder
var croppedImageName = Path.ChangeExtension(ImageFileName, "apng")
var path = Path.GetFullPath(Path.Combine(OutputFolder, croppedImageName));
using (var fileStream = File.Create(path))
{
updatedImage.Seek(0, SeekOrigin.Begin);
updatedImage.CopyTo(fileStream);
}
}
}
}
view raw crop-apng.cs hosted with ❤ by GitHub
 

About Aspose.Imaging Cloud API for .NET

Aspose.Imaging Cloud API is an image processing solution to process images (photos) within your cloud or web applications. It offers: cross-platform Image processing, including but not limited to conversions between various image formats (including uniform multi-page or multi-frame image processing), transformations (resize, crop, flip&rotate, grayscale, adjust), advanced image manipulation features (filtering, deskewing), AI features (i.e. object detection and reverse image search). It’s a Cloud API and does not depend on any software for image operations. One can easily add high-performance image conversion features with Cloud APIs within projects. Flexible integrations options including SDKs for various languages (Python, Ruby, .NET, Java, NodeJS, PHP) and the use of the REST API allow to make the integration easy.

Crop APNGs via Online App

Crop APNG documents by visiting our Live Demos website. The live demo has the following benefits:

  No need to download or setup anything
  No need to write any code
  Just upload your APNG files and hit "Crop" button
  Instantly get the download link for the resultant file

APNG What is APNG File Format

A file with .apng (Animated Portable Network Graphics) extension is a raster graphic format and is an unofficial extension to the Portable Network Graphic (PNG ). It comprises of multiple frames (each of PNG image) that represents an animation sequence. This gives similar visualization as a GIF file. APNG files support 24-bit images and 8-bit transparency. APNG is backward compatible with non-animated GIF files. APNG files use the same .png extension and can be opened by applications such as Mozilla Firefox, Chrome with APNG support, iMessage apps for iOS 10.

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Other Supported Conversions

Using C# Cloud API, one can easily crop different formats including:

BMP (Bitmap Picture)
GIF (Graphical Interchange Format)
JPEG (Joint Photographic Experts Group)
JPEG2000 (JPEG 2000)
PNG (Portable Network Graphics)
PSD (Photoshop Document)
TIFF (Tagged Image Format)
WEBP (Raster Web Image)
DICOM (Digital Imaging & Communications)
DNG (Digital Camera Image)
WMF (Microsoft Windows Metafile)
EMF (Enhanced Metafile Format)
TGA (Targa Graphic)