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Reduce SKImage to SKBitmap conversion, high quality canvas (#5366)

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Fernando Fernández 2025-04-01 01:45:03 +02:00 committed by GitHub
parent 5769c398c6
commit 2b742a5966
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GPG Key ID: B5690EEEBB952194
2 changed files with 19 additions and 19 deletions
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20
src/Jellyfin.Drawing.Skia/SkiaEncoder.cs
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@ -557,20 +557,14 @@ public class SkiaEncoder : IImageEncoder
canvas.Clear(SKColor.Parse(options.BackgroundColor));
}
using var paint = new SKPaint();
// Add blur if option is present
if (blur > 0)
{
// create image from resized bitmap to apply blur
using var paint = new SKPaint();
using var filter = SKImageFilter.CreateBlur(blur, blur);
paint.ImageFilter = filter;
canvas.DrawBitmap(resizedBitmap, SKRect.Create(width, height), paint);
}
else
{
// draw resized bitmap onto canvas
canvas.DrawBitmap(resizedBitmap, SKRect.Create(width, height));
}
using var filter = blur > 0 ? SKImageFilter.CreateBlur(blur, blur) : null;
paint.FilterQuality = SKFilterQuality.High;
paint.ImageFilter = filter;
// create image from resized bitmap to apply blur
canvas.DrawBitmap(resizedBitmap, SKRect.Create(width, height), paint);
// If foreground layer present then draw
if (hasForegroundColor)

18
src/Jellyfin.Drawing.Skia/StripCollageBuilder.cs
View File

@ -109,15 +109,18 @@ public partial class StripCollageBuilder
// resize to the same aspect as the original
var backdropHeight = Math.Abs(width * backdrop.Height / backdrop.Width);
using var residedBackdrop = SkiaEncoder.ResizeImage(backdrop, new SKImageInfo(width, backdropHeight, backdrop.ColorType, backdrop.AlphaType, backdrop.ColorSpace));
using var resizedBackdrop = SkiaEncoder.ResizeImage(backdrop, new SKImageInfo(width, backdropHeight, backdrop.ColorType, backdrop.AlphaType, backdrop.ColorSpace));
using var paint = new SKPaint();
paint.FilterQuality = SKFilterQuality.High;
// draw the backdrop
canvas.DrawImage(residedBackdrop, 0, 0);
canvas.DrawImage(resizedBackdrop, 0, 0, paint);
// draw shadow rectangle
using var paintColor = new SKPaint
{
Color = SKColors.Black.WithAlpha(0x78),
Style = SKPaintStyle.Fill
Style = SKPaintStyle.Fill,
FilterQuality = SKFilterQuality.High
};
canvas.DrawRect(0, 0, width, height, paintColor);
@ -131,7 +134,8 @@ public partial class StripCollageBuilder
TextSize = 112,
TextAlign = SKTextAlign.Left,
Typeface = typeFace,
IsAntialias = true
IsAntialias = true,
FilterQuality = SKFilterQuality.High
};
// scale down text to 90% of the width if text is larger than 95% of the width
@ -188,14 +192,16 @@ public partial class StripCollageBuilder
continue;
}
// Scale image. The FromBitmap creates a copy
// Scale image
var imageInfo = new SKImageInfo(cellWidth, cellHeight, currentBitmap.ColorType, currentBitmap.AlphaType, currentBitmap.ColorSpace);
using var resizeImage = SkiaEncoder.ResizeImage(currentBitmap, imageInfo);
using var paint = new SKPaint();
paint.FilterQuality = SKFilterQuality.High;
// draw this image into the strip at the next position
var xPos = x * cellWidth;
var yPos = y * cellHeight;
canvas.DrawImage(resizeImage, xPos, yPos);
canvas.DrawImage(resizeImage, xPos, yPos, paint);
}
}