Description: Slow scrolling through preview pages with large complex file Steps to Reproduce: 1. Open attachment 161226 [details] 2. Increase the preview size of the page 3. Scroll down in the preview panel Actual Results: Have to wait for every image being generated Expected Results: In LibreOffice 3.5.7.2 you can simply scroll. the preview is little high quality.. but speed is great Reproducible: Always User Profile Reset: No Additional Info: Found in Version: 7.0.0.0.alpha1+ (x64) Build ID: b587de60d4e6aa96238766272d94f1499b22f696 CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: Skia/Raster; VCL: win; Locale: nl-NL (nl_NL); UI: en-US Calc: CL and in 4.0 but not in LibreOffice 3.5.7.2 Build ID: 3215f89-f603614-ab984f2-7348103-1225a5b
Scrolling is choppy with 3.5.0 for me as well. What is your proposal, make the previews shitty quality?
(In reply to Buovjaga from comment #1) > Scrolling is choppy with 3.5.0 for me as well. What is your proposal, make > the previews shitty quality? Not rendering it in high quality does certainly help.. I prefer 'speed' above being awful accurate. And caching the previews would certainly help.. resize the pages panel.. and the rendering starts over again.. 'low resolution' place holder is shown, until refresh occurs.. Render a preview larges panel size; buffer it, and shrink that one fitting the panel seems more effective... But only a 'random' thought
Is there some change that you're work on thumbnails ( https://gerrit.libreoffice.org/c/core/+/104156) will fix/improve things here.. or I'm I totally misinterpreting you're current work?
(In reply to Telesto from comment #3) > Is there some change that you're work on thumbnails ( > https://gerrit.libreoffice.org/c/core/+/104156) will fix/improve things > here.. or I'm I totally misinterpreting you're current work? The patch was merged to master first https://gerrit.libreoffice.org/c/core/+/104114 so why not just wait for the next dailies?
Tested and there is no noticeable difference. Arch Linux 64-bit Version: 7.1.0.0.alpha0+ Build ID: 4f8b13267559e8e89a306a6c522f905322396bd0 CPU threads: 8; OS: Linux 5.8; UI render: default; VCL: kf5 Locale: fi-FI (fi_FI.UTF-8); UI: en-US Calc: threaded Built on 13 October 2020
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