[Libreoffice-bugs] [Bug 107521] Improve DirectWrite implementation font rendering on Windows

bugzilla-daemon at bugs.documentfoundation.org bugzilla-daemon at bugs.documentfoundation.org
Fri Oct 20 22:21:31 UTC 2017


https://bugs.documentfoundation.org/show_bug.cgi?id=107521

--- Comment #21 from V Stuart Foote <vstuart.foote at utsa.edu> ---
Created attachment 137171
  --> https://bugs.documentfoundation.org/attachment.cgi?id=137171&action=edit
rendering at 5.4.3. 1with OpenGL

@Tomaž, Michael, Khaled, *

Attached screen clips from the 5.4.3.1 Windows 64-bit build (from a 1920x1200
dpi monitor) showing Start Panel and the About dialog. 

One is with GDI fallback from DirectWrite and Direct2D, the other with OpenGL
and DirectWrite Direct2D rendering.

Accept that moving all rendering on Windows to Direct2D, or even FreeType,
along with floating point positioning (bug 103322) is a future refactoring. 

But, can we do anything with the render mode now to clear up font rendering
with OpenGL?

Would setting fixed rendering mode and anti alaising:

   DWRITE_RENDERING_MODE_CLEARTYPE_GDI_NATURAL
   D2D1_TEXT_ANTIALIAS_MODE_GRAYSCALE 

be a better DirectWrite Direct2D rendering match to the GDI rendering that
folks seem to prefer, and keeps folks away from using OpenGL?

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