private IImageEncoder ConvertFormat(TextureImageFormat format)
{
ImageFormatManager imageFormatManager = new ImageFormatManager();
IImageFormat imageFormat = null;
if (format == TextureImageFormat.image_jpeg)
{
imageFormat = imageFormatManager.FindFormatByFileExtension(".jpg");
}
else
{
imageFormat = imageFormatManager.FindFormatByFileExtension(".png");
}
return(imageFormatManager.FindEncoder(imageFormat));
}
public static string UploadImage(IFormFile file, string path, string fileName, int width, int height, bool maintainAspectRatio = false)
{
string fileExtension = Path.GetExtension(file.FileName);
string fileNameWithExtension = fileName + fileExtension;
string pathWithFileName = Path.Combine(path, fileNameWithExtension);
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
string[] files = Directory.GetFiles(path, fileName + ".*");
foreach (string item in files)
{
File.Delete(item);
}
if (file.Length > 0)
{
using (var stream = new FileStream(pathWithFileName, FileMode.Create))
{
using (Image <Rgba32> image = Image.Load(file.OpenReadStream()))
{
int destinationWidth = width;
int destinationHeight = height;
int originalWidth = image.Width;
int originalHeight = image.Height;
if (maintainAspectRatio && destinationWidth < originalWidth)
{
double ratio = 0;
ratio = (double)destinationWidth / (double)originalWidth;
destinationWidth = Convert.ToInt32(originalWidth * ratio);
destinationHeight = Convert.ToInt32(originalHeight * ratio);
}
image.Mutate(x => x.Resize(destinationWidth, destinationHeight));
ImageFormatManager imageFormatManager = new ImageFormatManager();
imageFormatManager.AddImageFormat(ImageFormats.Jpeg);
imageFormatManager.AddImageFormat(ImageFormats.Png);
image.Save(stream, imageFormatManager.FindFormatByFileExtension(fileExtension));
}
}
}
return(fileNameWithExtension);
}
