Update SkiaSharp to 2.80.1 and replace resize code.
This fixed the blurry resized images in the Web UI.
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@ -20,9 +20,8 @@
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<ItemGroup>
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<PackageReference Include="BlurHashSharp" Version="1.1.0" />
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<PackageReference Include="BlurHashSharp.SkiaSharp" Version="1.1.0" />
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<PackageReference Include="SkiaSharp" Version="1.68.3" />
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<PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="1.68.3" />
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<PackageReference Include="Jellyfin.SkiaSharp.NativeAssets.LinuxArm" Version="1.68.1" />
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<PackageReference Include="SkiaSharp" Version="2.80.1" />
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<PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="2.80.1" />
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</ItemGroup>
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<ItemGroup>
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@ -395,6 +395,42 @@ namespace Jellyfin.Drawing.Skia
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return rotated;
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}
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/// <summary>
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/// Resizes an image on the CPU, by utilizing a surface and canvas.
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/// </summary>
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/// <param name="source">The source bitmap.</param>
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/// <param name="targetInfo">This specifies the target size and other information required to create the surface.</param>
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/// <param name="isAntialias">This enables anti-aliasing on the SKPaint instance.</param>
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/// <param name="isDither">This enables dithering on the SKPaint instance.</param>
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/// <returns>The resized image.</returns>
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internal static SKImage ResizeImage(SKBitmap source, SKImageInfo targetInfo, bool isAntialias = false, bool isDither = false)
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{
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using var surface = SKSurface.Create(targetInfo);
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using var canvas = surface.Canvas;
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using var paint = new SKPaint();
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paint.FilterQuality = SKFilterQuality.High;
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paint.IsAntialias = isAntialias;
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paint.IsDither = isDither;
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var kernel = new float[9]
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{
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0, -.1f, 0,
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-.1f, 1.4f, -.1f,
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0, -.1f, 0,
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};
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var kernelSize = new SKSizeI(3, 3);
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var kernelOffset = new SKPointI(1, 1);
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paint.ImageFilter = SKImageFilter.CreateMatrixConvolution(
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kernelSize, kernel, 1f, 0f, kernelOffset, SKShaderTileMode.Clamp, false);
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canvas.DrawBitmap(source, SKRect.Create(0, 0, source.Width, source.Height), SKRect.Create(0, 0, targetInfo.Width, targetInfo.Height), paint);
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return surface.Snapshot();
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}
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/// <inheritdoc/>
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public string EncodeImage(string inputPath, DateTime dateModified, string outputPath, bool autoOrient, ImageOrientation? orientation, int quality, ImageProcessingOptions options, ImageFormat selectedOutputFormat)
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{
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@ -436,9 +472,8 @@ namespace Jellyfin.Drawing.Skia
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var width = newImageSize.Width;
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var height = newImageSize.Height;
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using var resizedBitmap = new SKBitmap(width, height, bitmap.ColorType, bitmap.AlphaType);
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// scale image
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bitmap.ScalePixels(resizedBitmap, SKFilterQuality.High);
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// scale image (the FromImage creates a copy)
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using var resizedBitmap = SKBitmap.FromImage(ResizeImage(bitmap, new SKImageInfo(width, height, bitmap.ColorType, bitmap.AlphaType, bitmap.ColorSpace)));
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// If all we're doing is resizing then we can stop now
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if (!hasBackgroundColor && !hasForegroundColor && blur == 0 && !hasIndicator)
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@ -446,7 +481,7 @@ namespace Jellyfin.Drawing.Skia
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Directory.CreateDirectory(Path.GetDirectoryName(outputPath));
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using var outputStream = new SKFileWStream(outputPath);
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using var pixmap = new SKPixmap(new SKImageInfo(width, height), resizedBitmap.GetPixels());
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pixmap.Encode(outputStream, skiaOutputFormat, quality);
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resizedBitmap.Encode(outputStream, skiaOutputFormat, quality);
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return outputPath;
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}
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@ -115,15 +115,13 @@ namespace Jellyfin.Drawing.Skia
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// resize to the same aspect as the original
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int iWidth = Math.Abs(iHeight * currentBitmap.Width / currentBitmap.Height);
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using var resizeBitmap = new SKBitmap(iWidth, iHeight, currentBitmap.ColorType, currentBitmap.AlphaType);
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currentBitmap.ScalePixels(resizeBitmap, SKFilterQuality.High);
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using var resizedImage = SkiaEncoder.ResizeImage(bitmap, new SKImageInfo(iWidth, iHeight, currentBitmap.ColorType, currentBitmap.AlphaType, currentBitmap.ColorSpace));
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// crop image
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int ix = Math.Abs((iWidth - iSlice) / 2);
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using var image = SKImage.FromBitmap(resizeBitmap);
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using var subset = image.Subset(SKRectI.Create(ix, 0, iSlice, iHeight));
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using var subset = resizedImage.Subset(SKRectI.Create(ix, 0, iSlice, iHeight));
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// draw image onto canvas
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canvas.DrawImage(subset ?? image, iSlice * i, 0);
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canvas.DrawImage(subset ?? resizedImage, iSlice * i, 0);
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}
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return bitmap;
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@ -177,9 +175,8 @@ namespace Jellyfin.Drawing.Skia
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continue;
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}
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using var resizedBitmap = new SKBitmap(cellWidth, cellHeight, currentBitmap.ColorType, currentBitmap.AlphaType);
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// scale image
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currentBitmap.ScalePixels(resizedBitmap, SKFilterQuality.High);
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// Scale image. The FromBitmap creates a copy
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using var resizedBitmap = SKBitmap.FromImage(SkiaEncoder.ResizeImage(bitmap, new SKImageInfo(cellWidth, cellHeight, currentBitmap.ColorType, currentBitmap.AlphaType, currentBitmap.ColorSpace)));
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// draw this image into the strip at the next position
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var xPos = x * cellWidth;
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