After upgrading from 5.3.1.2 (x86_64) to 5.3.2.2 (x86_64), i am no longer able to get Cleartype to work. I've tried checking and unchecking all the "Graphics" checkboxes ("Use hardware acceleration", "Use OpenGL for all rendering", "Use anti-aliasing"). Whether it says "GL is currently disabled" or "GL is currently enabled" doesn't matter - nothing is rendered with Cleartype. Rolling back to 5.3.1.2 solved the problem for now. In 5.3.1.2 Cleartype works with "Use hardware acceleration" and "Use anti-aliasing" checked, and with "GL is currently disabled". I'm barking at the GL tree because usually it's GL rendering that prevents Cleartype from being used. 5.4.0.0alpha0 (master~2017-04-15_04.48.35_LibreOfficeDev_5.4.0.0.alpha0_Win_x64_en-US_de_ar_ja_ru_qtz.msi) is also affected the same way as 5.3.2.2
ClearType sub-pixel rendering has *never* been implemented on LibreOffice, rendering for non-OpenGL had been with GDI calls through 5.3.1 At 5.3.2.1 DirectWrite calls have replaced more of the GDI calls for rendering on Windows builds. Bringing "default" rendering (H/W accelerated and CPU only) on Windows in line with OpenGL. See bug 106990 "font rendering got worse looking in 5.3.2.2 (for Default rendering, OpenGL not affected)"
*** This bug has been marked as a duplicate of bug 106990 ***
*** This bug has been marked as a duplicate of bug 112492 ***