public async Task <Uri> GetCroppedUri(Guid name, int withSize, int heightSize, Stream originalStream = null)
{
var nameInStorage = GetNameInStorage(name, Tipo.cropped, withSize, heightSize);
if (originalStream == null)
{
if (_linkCache.Cache.ContainsKey(nameInStorage))
{
return(_linkCache.Cache[nameInStorage]);
}
if (await _azureBlobStorage.ExistsAsync(nameInStorage))
{
var uri = GetTrueUri(nameInStorage);
_linkCache.Cache.Add(nameInStorage, uri);
return(uri);
}
var originalNameInStorge = GetNameInStorage(name, Tipo.original, 0, 0);//obtem a uri da imagem original para gerar a cropped
if (!await _azureBlobStorage.ExistsAsync(originalNameInStorge))
{
await _notifications.Handle(new DomainNotification("Id", "Imagem não localizada"), new System.Threading.CancellationToken());
return(GetErroUri());
}
originalStream = await _azureBlobStorage.GetStreamAsync(originalNameInStorge);
}
originalStream.Seek(0, SeekOrigin.Begin);
using (Image <Rgba32> image = SixLabors.ImageSharp.Image.Load(originalStream))
{
//verifica se da pra fazer o crop
if (withSize < image.Width && heightSize < image.Height)
{
Image <Rgba32> result = image.Clone(ctx => ctx.Resize(
new ResizeOptions
{
Size = new Size(withSize, heightSize),
Mode = ResizeMode.Crop
}));
var resultStream = new MemoryStream();
result.SaveAsPng(resultStream);
await _azureBlobStorage.UploadAsync(nameInStorage, resultStream);
var uri = GetTrueUri(nameInStorage);
_linkCache.Cache.Add(nameInStorage, uri);
return(uri);
}
else // se não der pra fazer pega dimensões abaixo das solicitadas
{
double fator = 1;
fator = withSize - image.Width > heightSize - image.Height ? (double)image.Width / (double)withSize : (double)image.Height / (double)heightSize;
var novoWidth = (int)Math.Floor(withSize * fator);
if (dimensoes.Where(q => q < novoWidth).Any())
{
novoWidth = dimensoes.Where(q => q < novoWidth).Max();
}
var novoHeight = (int)Math.Round(((double)novoWidth / (double)withSize) * heightSize); // para manter a proporção solicitada
if (novoWidth != image.Width && novoHeight != image.Height)
{
var novoUri = await GetCroppedUri(name, novoWidth, novoHeight);
_linkCache.Cache.Add(nameInStorage, novoUri);
return(novoUri);
}
//retorna o original se estiver menor q o solicitado e nas proporsoes solicitadas
var originalNameInStorge = GetNameInStorage(name, Tipo.original, 0, 0);//obtem a uri da imagem original para gerar a cropped
var uri = GetTrueUri(originalNameInStorge);
_linkCache.Cache.Add(nameInStorage, uri);
return(uri);
}
}
}
