[Libreoffice-bugs] [Bug 139296] Text font size changes when scrolling document with a mouse

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=139296

--- Comment #8 from V Stuart Foote <vstuart.foote at utsa.edu> ---
Created attachment 168758
  --> https://bugs.documentfoundation.org/attachment.cgi?id=168758&action=edit
misregisterd line of text w/Skia raster rendering

Reducing the document canvas y-height so text can move out of view port without
the view crossing a page boundry, scrolling down & up with mouse wheel or
scroll bar "thumb" a single line of text can be made to lose its
registration--and the distorted "torn" text can move down or up out of view and
return and still be distorted.

But if moved far enough, or if the page scrolls to the next or prior page, the
text run will be refreshed and no longer mis-registered.

This occurs in a very low percentage of scroll movements <5% , but it does
occur with GDI default mode rendering, and with both Skia Vulkan and Skia
raster mode rendering. Did not check OpenGL rendering. Did not check if font
changes affect percentage of the line tear.

RenderMethod: vulkan
Vendor: 0x8086
Device: 0x5916
API: 1.2.151
Driver: 0.402.591
DeviceType: integrated
DeviceName: Intel(R) HD Graphics 620
Denylisted: no


Version: 7.2.0.0.alpha0+ (x64)
Build ID: 57a59ad02d2e5e89724c0d2e60cf6e7d99fba005
CPU threads: 4; OS: Windows 10.0 Build 19042; UI render: Skia/Raster; VCL: win
Locale: en-US (en_US); UI: en-US
Calc: threaded

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