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using SkiaSharp;
namespace MyDarling.Services
{
public class ImageResizer : IImageResizer
{
public void CreateThumbnail(string inputPath)
{
using var input = File.OpenRead(inputPath);
using var inputStream = new SKManagedStream(input);
var outputPath = Path.GetDirectoryName(inputPath) + "/" +
Path.GetFileNameWithoutExtension(inputPath) + "_thumb.jpg";
WriteResized(inputStream, 600, outputPath);
}
public void WriteResized(IFormFile formFile, string outputFilePath)
{
SKManagedStream stream = new(formFile.OpenReadStream());
WriteResized(stream, 2000, outputFilePath);
}
private void WriteResized(SKManagedStream stream, int size, string outputFilePath)
{
int quality = 95;
var skData = SKData.Create(stream);
using var original = SKBitmap.Decode(skData);
int width, height;
if (original.Width > original.Height)
{
width = size;
height = original.Height * size / original.Width;
}
else
{
width = original.Width * size / original.Height;
height = size;
}
using var resized = original.Resize(new SKImageInfo(width, height), SKFilterQuality.High);
if (resized == null) return;
using var image = SKImage.FromBitmap(resized);
using var output = File.OpenWrite(outputFilePath);
image.Encode(SKEncodedImageFormat.Jpeg, quality).SaveTo(output);
}
}
}
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