GNU bug report logs - #60585
30.0.50; global-text-scale-adjust shrinks window (was not before)

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From: Dmitry Gutov <dgutov <at> yandex.ru>
To: martin rudalics <rudalics <at> gmx.at>, Eli Zaretskii <eliz <at> gnu.org>
Cc: 60585 <at> debbugs.gnu.org, rpluim <at> gmail.com
Subject: bug#60585: 30.0.50; global-text-scale-adjust shrinks window (was not before), was: Re: bug#52493: 29.0.50; Setting Inconsolata up in init.el makes default face rendered wrong
Date: Sat, 28 Jan 2023 02:22:51 +0200

On 27/01/2023 11:35, martin rudalics wrote:
> This shows how scaling strongly affects whatever GNOME displays here and
> what Emacs uses internally.  It might be illustrative to put two equally
> sized frames above each other - one from a GTK and one from a Lucid
> build - and look at what size hints GNOME displays for each of them.

Let me know if you really need that -- I'd have to compile Emacs in two 
separate directories.

> For the rest, the transcript nowhere shows that the GNOME hints jump by
> two or more after 'set-face-attribute'.  Can you spot such behavior?

The jumps in the log look smooth, but one set-face-attribute evaluation 
creates several log entries. After I resize the frame to 118x35 and 
evaluate the s-f-a form, all of this is printed in the log:

x_new_font old char size 17x37 new char size 17x37 text chars 112x35 old 
text pixels 1904x1296 new text pixels 1904x1295
xg_wm_set_size_hint scale 2 char width 17 toolbar 0 vscroll 32 fringes 
16 borders 0 text width 952 base width 32 width inc 8
    char height 37 menubar 50 toolbar 82 hscroll 0 borders 0 text 
height 647 base height 101 height inc 18
xg_frame_set_char_size old native pixels 1952x1296 new native pixels 
1952x1295 outer pixels 976x713 outer rest 0x0
    base_size 32x101 size increments 8x18 WM hint 118x34
xg_frame_resized old native pixels 1952x1296 new native pixels 1952x1294
adjust_frame_size old native pixels 1952x1296 new native pixels 
1952x1294 old text pixels 1904x1296 new text pixels 1904x1294 old text 
chars 112x35 new text chars 112x34
    base_size 32x101 size increments 8x18 WM hint 118x34

x_new_font old char size 17x37 new char size 17x37 text chars 112x34 old 
text pixels 1904x1294 new text pixels 1904x1258
xg_frame_set_char_size old native pixels 1952x1294 new native pixels 
1952x1258 outer pixels 976x695 outer rest 0x0
    base_size 32x101 size increments 8x18 WM hint 118x33
xg_frame_resized old native pixels 1952x1294 new native pixels 1952x1258
adjust_frame_size old native pixels 1952x1294 new native pixels 
1952x1258 old text pixels 1904x1294 new text pixels 1904x1258 old text 
chars 112x34 new text chars 112x34
    base_size 32x101 size increments 8x18 WM hint 118x33

...and the frame is 118x33 at the end, naturally.

Then I can resize the frame again, this is printed:

xg_frame_resized old native pixels 1952x1258 new native pixels 1952x1294
adjust_frame_size old native pixels 1952x1258 new native pixels 
1952x1294 old text pixels 1904x1258 new text pixels 1904x1294 old text 
chars 112x34 new text chars 112x34
    base_size 32x101 size increments 8x18 WM hint 118x34
xg_frame_resized old native pixels 1952x1294 new native pixels 1952x1330
adjust_frame_size old native pixels 1952x1294 new native pixels 
1952x1330 old text pixels 1904x1294 new text pixels 1904x1330 old text 
chars 112x34 new text chars 112x35
    base_size 32x101 size increments 8x18 WM hint 118x35

Then I call s-a-f again, and a lot of stuff (slightly different: it 
seems the xg_wm_set_size_hint calls is missing) is printed again:

x_new_font old char size 17x37 new char size 17x37 text chars 112x35 old 
text pixels 1904x1330 new text pixels 1904x1295
xg_frame_set_char_size old native pixels 1952x1330 new native pixels 
1952x1295 outer pixels 976x713 outer rest 0x0
    base_size 32x101 size increments 8x18 WM hint 118x34
xg_frame_resized old native pixels 1952x1330 new native pixels 1952x1294
adjust_frame_size old native pixels 1952x1330 new native pixels 
1952x1294 old text pixels 1904x1330 new text pixels 1904x1294 old text 
chars 112x35 new text chars 112x34
    base_size 32x101 size increments 8x18 WM hint 118x34

x_new_font old char size 17x37 new char size 17x37 text chars 112x34 old 
text pixels 1904x1294 new text pixels 1904x1258
xg_frame_set_char_size old native pixels 1952x1294 new native pixels 
1952x1258 outer pixels 976x695 outer rest 0x0
    base_size 32x101 size increments 8x18 WM hint 118x33
xg_frame_resized old native pixels 1952x1294 new native pixels 1952x1258
adjust_frame_size old native pixels 1952x1294 new native pixels 
1952x1258 old text pixels 1904x1294 new text pixels 1904x1258 old text 
chars 112x34 new text chars 112x34
    base_size 32x101 size increments 8x18 WM hint 118x33

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