From: Yuuki Harano <masm+emacs@masm11.me>
To: moonsolo@gmail.com
Cc: 52042@debbugs.gnu.org
Subject: bug#52042: 29.0.50; [feature/pgtk] issue in moving a fullscreen emacs frame from a scale@1x display to a scale@2x display
Date: Thu, 02 Dec 2021 00:08:56 +0900 (JST) [thread overview]
Message-ID: <20211202.000856.162232917581372790.masm@luna.pink.masm11.me> (raw)
In-Reply-To: <CAOR66h=Xd11E3fbCk7SWo7ckEVQ2Ne9PfgKgE7Pz695Tjx6fjQ@mail.gmail.com>
On Tue, 30 Nov 2021 11:10:37 -0500,
Fred Fu <moonsolo@gmail.com> wrote:
> I don't think three monitors are needed. Two monitors, one scaled@2x
> and one @1x, should be enough to reproduce the issue.
Reproduced.
I have a TV, that can be connected to my note PC, and tried GNOME(Wayland).
The PC's monitor is 2x and the TV is 1x.
I moved a pgtk emacs frame from the TV to the PC's monitor, and it became
blurry. When I resized it, it recovered.
> That said, I'd love to help debug this issue on my end, but I don't
> know what to start with. Any ideas?
I have a cairo_surface_t and draw on it. And I copy it on gtk window
when gtk wants so.
I don't scale fonts explicitly. Scaling is done implicitly by compositor,
gtk, and cairo.
My guess:
cairo_surface_t is bitmap.
On 1x, cairo_surface_t has non-scaled texts, and it is drawn on
gtk window as is.
When I move it to 2x, cairo_surface_t is drawn on gtk window
at double size. It is blurry, because cairo_surface_it is bitmap.
When I resize it, I recreate cairo_surface_t of logical size.
When that, cairo_surface_t is double size implicitly.
cairo_surface_t has 2x scaled texts. It is not blurry, because
fonts are vector graphics.
It is drawn on gtk window as is.
Maybe, I need to recreate cairo_surface_t when monitor
is changed. I looked for such a signal but nothing found.
--
Yuuki Harano
next prev parent reply other threads:[~2021-12-01 15:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAOR66hntRyn0hZA_-vMhN=kGhw7x=dOxbfGJYQp-CBzX_b__mw@mail.gmail.com>
2021-11-30 15:59 ` bug#52042: 29.0.50; [feature/pgtk] issue in moving a fullscreen emacs frame from a scale@1x display to a scale@2x display Yuuki Harano
2021-11-30 16:10 ` Fred Fu
2021-12-01 15:08 ` Yuuki Harano [this message]
2021-12-01 15:20 ` Fred Fu
2021-12-01 15:47 ` Yuuki Harano
2021-12-04 7:41 ` Yuuki Harano
2021-12-02 22:09 ` Alan Third
2021-12-02 22:12 ` Alan Third
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