1 Dec
2016
1 Dec
'16
9:08 p.m.
Felix Miata wrote:
OK, so lets see what might be learned from the
screenshot (this is
actually part of what the original exercise was/is about):
A-an xterm was opened, and xdpyinfo reported the screen's apparent
resolution and logical pixel density
B-xrandr was used to change the current screen's logical pixel density
while keeping the same resolution
C-another xterm was opened, so that the impact of the xrandr command could
be evaluated, in part by again using xdpyinfo
Observations:
I would look into the documentation and code. We are not studying something
that is outside of our worl like natural science where we observe :)
This here is pure mathematics
1-image sizes in (what there is of) UI remained
unchanged
2-text size in the window decoration (titlebar) remained unchanged
3-other elements of the window decorations also remained unchanged (e.g.
titlebar height)
4-xdpyinfo reports logical density increased from 108 to 133
5-text size in the new/2nd xterm application instance increased
Conclusions:
a-Window decorations seem to be part of an already running process, so are
unaffected.
correct - this is the window manager ( in my case twin)
b-Icon sizes (probably all bitmaps here, so sized in
px) may be
unaffected, but we can't be sure they are not from an already running
process, so can't know whether they've been sized in px or pt (or other)
I
am not sure what you mean
"If your image is 72ppi (pixels per inch), then one point will equal exactly
one pixel. Point is a physical unit of length, used in typography. It's
equal to 1/12 Pica, and 1 Pica = 1/6 inch. So 1 pt = 1/72 inch."
"In applications, a point is exactly 1/72 inches."
http://graphicdesign.stackexchange.com/questions/199/point-vs-pixel-what-is…
c-Server's logical density increase caused text
size increase in the new
application instance (text sized in "physical" units: pt)
this is true
d-Nothing other than text size seems to have been
changed
Have you tested anything else?
e-Other???
f-An increase in DPI on session start, all else being equal, can be
expected to cause an increase in text sizes, if not in other screen
elements g-Use of tdecmshell would probably provide more useful
information for my original purpose than does an xterm
If you change dpi and restart the window manager I would expect that icons
look different. Perhaps you can test that
As an additional exercise, compare the following (from
separate sessions
using configurations differing only in configured DPI (xrandr in startup
script)). Note that the titlebar's right side's icons are larger, but not
the left's (Firefox) icon, and that nothing within the application's web
content area seems differently sized (movies, images and most web text are
sized in px): http://fm.no-ip.com/SS/dt1680x108.png
http://fm.no-ip.com/SS/dt1680x144.png
Under look and feel -> fonts you can enforce the DPI
regards
