private static async Task <Stream> GenerateImageAsync(byte[] originalImage, ImageFileSpec imageFileSpec, Table table)
{
var individualImageStopwatch = new Stopwatch();
individualImageStopwatch.Start();
using (var job = new ImageJob())
{
var buildNode = job.Decode(originalImage);
var resampleHints = new ResampleHints();
if (imageFileSpec.FileSpecFormat != FileSpecFormat.WebPLossless && imageFileSpec.SharpeningAmount > 0)
{
resampleHints.SetSharpen(imageFileSpec.SharpeningAmount, SharpenWhen.Downscaling).SetResampleFilters(imageFileSpec.InterpolationFilter, null);
}
buildNode = buildNode.ConstrainWithin(imageFileSpec.PixelLength, imageFileSpec.PixelLength, resampleHints);
IEncoderPreset encoderPreset;
if (imageFileSpec.FileSpecFormat == FileSpecFormat.WebPLossless)
{
encoderPreset = new WebPLosslessEncoder();
}
else if (imageFileSpec.FileSpecFormat == FileSpecFormat.WebPLossy)
{
encoderPreset = new WebPLossyEncoder(imageFileSpec.Quality);
}
else
{
encoderPreset = new MozJpegEncoder(imageFileSpec.Quality, true);
}
var result = await buildNode
.EncodeToBytes(encoderPreset)
.Finish()
.SetSecurityOptions(new SecurityOptions()
.SetMaxDecodeSize(new FrameSizeLimit(99999, 99999, 200))
.SetMaxFrameSize(new FrameSizeLimit(99999, 99999, 200))
.SetMaxEncodeSize(new FrameSizeLimit(99999, 99999, 200)))
.InProcessAsync();
var newImageBytes = result.First.TryGetBytes();
if (newImageBytes.HasValue)
{
var newStream = new MemoryStream(newImageBytes.Value.ToArray());
individualImageStopwatch.Stop();
var kb = newImageBytes.Value.Count / 1024;
var size = $"{kb} kb";
table.AddRow(imageFileSpec.ToString(), individualImageStopwatch.ElapsedMilliseconds.ToString(), size);
return(newStream);
}
}
individualImageStopwatch.Stop();
AnsiConsole.Render(new Markup("[bold red]Something went wrong with an image generation.[/]"));
return(null);
}
/// <summary>
/// Generates an resized image of the original in WebP format (quicker, smaller files).
/// </summary>
/// <param name="image">The Image the new file should be generated for. Used for logging purposes.</param>
/// <param name="originalImage">The byte array for the original image.</param>
/// <param name="imageFileSpec">The name of the image file specification to base the new image.</param>
/// <returns>A new image stream for the resized image</returns>
private static async Task <Stream> GenerateImageAsync(Image image, byte[] originalImage, ImageFileSpec imageFileSpec)
{
var stopwatch = new Stopwatch();
stopwatch.Start();
using (var job = new ImageJob())
{
var buildNode = job.Decode(originalImage);
var resampleHints = new ResampleHints();
if (imageFileSpec.FileSpecFormat != FileSpecFormat.WebPLossless && imageFileSpec.SharpeningAmount > 0)
{
resampleHints.SetSharpen(imageFileSpec.SharpeningAmount, SharpenWhen.Downscaling).SetResampleFilters(imageFileSpec.InterpolationFilter, null);
}
buildNode = buildNode.ConstrainWithin(imageFileSpec.PixelLength, imageFileSpec.PixelLength, resampleHints);
IEncoderPreset encoderPreset;
if (imageFileSpec.FileSpecFormat == FileSpecFormat.WebPLossless)
{
encoderPreset = new WebPLosslessEncoder();
}
else if (imageFileSpec.FileSpecFormat == FileSpecFormat.WebPLossy)
{
encoderPreset = new WebPLossyEncoder(imageFileSpec.Quality);
}
else
{
encoderPreset = new MozJpegEncoder(imageFileSpec.Quality, true);
}
var result = await buildNode
.EncodeToBytes(encoderPreset)
.Finish()
.SetSecurityOptions(new SecurityOptions()
.SetMaxDecodeSize(new FrameSizeLimit(99999, 99999, 200))
.SetMaxFrameSize(new FrameSizeLimit(99999, 99999, 200))
.SetMaxEncodeSize(new FrameSizeLimit(99999, 99999, 200)))
.InProcessAsync();
var newImageBytes = result.First.TryGetBytes();
if (newImageBytes.HasValue)
{
var newStream = new MemoryStream(newImageBytes.Value.ToArray());
stopwatch.Stop();
_log.Information($"LB.PhotoGalleries.Worker.Program.GenerateImageAsync() - Image {image.Id} and spec {imageFileSpec} done. Elapsed time: {stopwatch.ElapsedMilliseconds}ms");
return(newStream);
}
}
stopwatch.Stop();
_log.Warning($"LB.PhotoGalleries.Worker.Program.GenerateImageAsync() - Couldn't generate new image for {image.Id}! Elapsed time: {stopwatch.ElapsedMilliseconds}ms");
return(null);
}
