public async Task <bool> WriteAndCropFile(string fileHash,
OffsetModel offsetData, int sourceWidth,
int sourceHeight, FileIndexItem.Rotation rotation,
string reference = null)
{
try
{
using (var thumbnailStream = new MemoryStream(offsetData.Data, offsetData.Index, offsetData.Count))
using (var smallImage = await Image.LoadAsync(thumbnailStream))
using (var outputStream = new MemoryStream())
{
var smallImageWidth = smallImage.Width;
var smallImageHeight = smallImage.Height;
var result = NewImageSize.NewImageSizeCalc(smallImageWidth,
smallImageHeight, sourceWidth, sourceHeight);
smallImage.Mutate(
i => i.Resize(smallImageWidth, smallImageHeight, KnownResamplers.Lanczos3)
.Crop(new Rectangle(result.DestX, result.DestY, result.DestWidth, result.DestHeight)));
var larger = (int)Math.Round(result.DestWidth * 1.2, 0);
smallImage.Mutate(
i => i.Resize(larger, 0, KnownResamplers.Lanczos3));
var rotate = RotateEnumToDegrees(rotation);
smallImage.Mutate(
i => i.Rotate(rotate));
await smallImage.SaveAsJpegAsync(outputStream);
await _thumbnailStorage.WriteStreamAsync(outputStream, ThumbnailNameHelper.Combine(fileHash, ThumbnailSize.TinyMeta));
if (_appSettings.ApplicationType == AppSettings.StarskyAppType.WebController)
{
_logger.LogInformation($"[WriteAndCropFile] fileHash: {fileHash} is written");
}
}
return(true);
}
catch (Exception ex)
{
var message = ex.Message;
if (message.StartsWith("Image cannot be loaded"))
{
message = "Image cannot be loaded";
}
_logger.LogError($"[WriteFile@meta] Exception {reference} {message}", ex);
return(false);
}
}
public void NewImageSize_Portrait()
{
var sourceWidth = 2832;
var sourceHeight = 4240;
var smallWidth = 120;
var smallHeight = 160;
var rNewImageSizeCalc = NewImageSize.NewImageSizeCalc(smallWidth,
smallHeight, sourceWidth, sourceHeight);
Assert.AreEqual(160, rNewImageSizeCalc.DestHeight);
Assert.AreEqual(106, rNewImageSizeCalc.DestWidth);
Assert.AreEqual(7, rNewImageSizeCalc.DestX);
Assert.AreEqual(0, rNewImageSizeCalc.DestY);
}