[cairo-bugs] [Bug 69796] HiDPI scaling not working with quartz cairo_surface_create_similar() implementation

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69796

--- Comment #5 from Christoph Reiter <reiter.christoph at gmail.com> ---
Created attachment 117242
  --> https://bugs.freedesktop.org/attachment.cgi?id=117242&action=edit
back buffer scale variant

For completeness, here is a cairo only fix which increases the cairo back
buffer and scales it using CGContextScaleCTM.

Brion's patches work as well here and makes set_device_scale() work as with
X11, while with this it gets added on top of the osx scaling.

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