https://bugs.documentfoundation.org/show_bug.cgi?id=107521
Bug ID: 107521
Summary: Improve DirectWrite implementation font rendering on
Windows
Product: LibreOffice
Version: 5.3.0.3 release
Hardware: All
OS: Windows (All)
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: graphics stack
Assignee: [email protected]
Reporter: [email protected]
So, at 5.3.2.2 the OpenGL and the Default rendering both are DirectWrite based
and now match output--but both are a bit roughly rendered.
And we have the complaints of bug 106990 (seemingly from users of Default
rendering, not previously exposed to quality of OpenGL rendering).
Is this a shortcoming with our DirectWrite implementation? Are we missing a
control that leaves the ID2D1RenderTarget set to defaults and so is getting an
unappealing rendering on Windows builds?
Should we be setting Rendering and Measurement modes from
SetTextRenderingParams, and AntiAlais modes from SetTextAntialiasMode, to get
more appealing rendering for both OpengGL and Default rendering.
And would implementing IDWriteFontFace::GetRecommendedRenderingMode be helpful
to add to the font handling?
Not a dev but the DirectWrite documentation seems to suggest we are missing
something.
=-refs-=
ID2D1RenderTarget::SetTextRenderingParams
https://msdn.microsoft.com/en-us/library/windows/desktop/dd316898(v=vs.85).aspx
IDWriteRenderingParams interface
https://msdn.microsoft.com/en-us/library/windows/desktop/dd371285(v=vs.85).aspx
GetRenderingModes
https://msdn.microsoft.com/en-us/library/windows/desktop/dd371300(v=vs.85).aspx
Rendering Mode Win8 and earlier
https://msdn.microsoft.com/en-us/library/windows/desktop/jj710196(v=vs.85).aspx
Rendering Mode Win8.1 and on
https://msdn.microsoft.com/en-us/library/windows/desktop/dd368118(v=vs.85).aspx
AntiAlaisModes
https://msdn.microsoft.com/en-us/library/windows/desktop/dd368170(v=vs.85).aspx
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