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-the-difference > 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
