289333 2025-03-07 06:41:56 -0800 [GTK] Touchpad pinch to zoom does not work smoothly 2026-03-25 03:19:15 -0700 1 1 1 Unclassified WebKit WebKitGTK WebKit Nightly Build PC Linux RESOLVED FIXED P2 Normal --- 1 kdwkleung webkit-unassigned bugs-noreply webkit zyx oldest_to_newest 2101353 0 kdwkleung 2025-03-07 06:41:56 -0800 When using a touchpad to pinch-zoom, the web page instantly changes scale without the animation in between. WebKitGTK 2.47.90 GStreamer 1.24.12 GTK 4.17.7 Libadwaita 1.7.0 Distributor: GNOME 2124750 1 zyx 2025-06-19 08:57:10 -0700 Sometimes its smooth for me othertimes its instant or choppy 2157419 2 webkit 2025-11-07 19:09:41 -0800 It's more that it often catches multi-second lags than being choppy in general. If you wait for some time before releasing the fingers and keep moving them, it eventually starts acting smoothly for a moment before catching another lag. This started happening in 2.48 - can't reproduce on 2.46 - and it applies to touchscreen zoom gesture as well, not just touchpad. Can be seen with both GTK3 and GTK4. 2157449 3 zyx 2025-11-08 02:52:03 -0800 I should mention the pinch to zoom with a touchpad is buttery smooth in evolution but choppy in epiphany and Minibrowser[GTK4] 2157458 4 webkit 2025-11-08 11:17:31 -0800 That's because Evolution forces hardware acceleration to be off. You can run Epiphany or MiniBrowser with WEBKIT_DISABLE_DMABUF_RENDERER=1 and it will be smooth as well - that is, as long as your device can keep up :) It doesn't appear hardware/driver specific - I can reproduce it on both Intel and Vivante GPUs. 2193052 5 webkit 2026-03-24 00:27:36 -0700 Pull request: https://github.com/WebKit/WebKit/pull/61215 2193459 6 ews-feeder 2026-03-25 03:19:12 -0700 Committed 309900@main (1f39a7f2d79b): <https://commits.webkit.org/309900@main> Reviewed commits have been landed. Closing PR #61215 and removing active labels.