https://bugs.documentfoundation.org/show_bug.cgi?id=142940
--- Comment #20 from Adam Fontenot <[email protected]> --- Created attachment 178784 --> https://bugs.documentfoundation.org/attachment.cgi?id=178784&action=edit animation showing behavior with and without pair kerning I was poking around with this bug some more and discovered something quite strange. I'm hoping someone can help me understand it and suggest whether filing a separate bug report for it would be worthwhile. The attachment shows the issue. The images in the GIF are subpixel antialiased and then re-rendered in grayscale using the RGB value of each subpixel. (The result is point upscaled 3x for clarity.) The transition from "no pair kerning" to "pair kerning" makes sense, because it illustrates this bug. Pair kerning makes things worse when subpixel positioning isn't supported. The transition from plain Cairo to Cairo with subpixel positioning disabled also makes sense, because it illustrates why the lack of subpixel positioning in LibreOffice (bug 103322) is such a big problem. But the transition from Cairo with no subpixel positioning to LibreOffice is very strange! They're *similar*, but the position of the two "a" characters is pretty bad in LibreOffice. This seems to suggest that LibreOffice has another glyph positioning bug - not only does it not support subpixel positioning, it frequently doesn't even pick the best *pixel* position, despite Cairo doing so. Is this a different issue than bug 103322? I'd be happy to report it. -- You are receiving this mail because: You are the assignee for the bug.
