jellyfin/tests/Jellyfin.Drawing.Skia.Tests, branch masterUnnamed repository; edit this file 'description' to name the repository.
https://git.b0n.dev/jellyfin/atom?h=master2026-09-15T15:16:11ZBackport pull request #17956 from jellyfin/release-12.z2026-09-15T15:16:11ZShadowghostShadowghost@users.noreply.github.com2026-09-15T15:16:11Zurn:sha1:8e2b62331d8f6c632ad8bcc80149818ba5b8a800
Don't resample or sharpen images Skia isn't actually resizing
Original-merge: 7d7faf08b7769af0f6c544cab59fb57316167d84
Merged-by: crobibero <cody@robibe.ro>
Backported-by: Cody Robibero <cody@robibe.ro>
Apply the resize sharpening kernel directly instead of via SKImageFilter2026-09-02T19:41:36ZAlbertbassmann1911@gmail.com2026-09-02T19:41:36Zurn:sha1:064de2172ebdad0b9dfc946fed8e95f59efb9b33
Since the SkiaSharp 3 update the MatrixConvolution image filter used in
SkiaEncoder.ResizeImage no longer has a fast CPU path: on the software
rasterizer it takes about 4.5 seconds per megapixel-sized image, which
turns every cold image request into a multi-second operation and makes
first-time loads of a library view take minutes.
Draw the resize without the paint filter and apply the identical 3x3
kernel (same weights, clamped edges, alpha included) directly on the
resized pixels instead. This drops a cold 1000x1500 -> 663x995 poster
render from ~4.6s to well under a second; the convolution pass itself
takes ~86ms. Output is visually unchanged.
Apply review suggestions2026-08-28T05:21:37ZShadowghostGhost_of_Stone@web.de2026-08-28T05:21:37Zurn:sha1:99f21f16627e4899fbdf10aa0fa340b70452561ePrevent SSRF, local file disclosure and DoS via external references in SVG rendering2026-08-25T09:04:24ZShadowghostGhost_of_Stone@web.de2026-08-25T09:04:24Zurn:sha1:cefa78fc1de2410e5c5c6da5062c98fe98b22d17