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HiDPI support for wave style underlines

From: Stephen Pegoraro
Subject: HiDPI support for wave style underlines
Date: Sat, 29 Jul 2017 11:29:43 +0800


I have made an attempt at implementing scaled drawing of wave style
underlines for hidpi displays, X only for now.
This is my first contribution to emacs so any feedback would be great!
I've followed the commit and patch style from CONTRIBUTE as closely as
I could but let me know if there's any issue.

It works by determining a scale factor from x_display_info's resx and
resy members then setting the wave_height and wave_length values
accordingly. Thickness was added using XSetLineAttributes and scaled
as well. Tested on displays with various scales from 1 to 3.

Steve Pegoraro

Attachment: 0001-Implement-HiDPI-support-for-wave-style-underlines.patch
Description: Text Data

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