On 2024-07-20, Carsten Haitzler wrote: > create the pixmap to match the depth of the window, not the other way around. > libxpm is a pretty inefficient thing. xpm's are too. there are plenty of other > solutions that are far better... :)
That's what I often do. This is an exceptional case in which the pixmap is created before the window. This is a library function which creates, handles, and destroy an icon window while in its event loop. The caller program is limited to set the window's background-pixmap attribute. I think I'm gonna write it with the API limitation that the given pixmap must have the same depth of the root window. Otherwise the library will simply fall back to a default (compile-time defined) pixmap. I am writing a drag-and-drop library, btw. On 2024-07-20, Carsten Haitzler wrote: > but yes - you need to create a window with a visual that is supported (and > obviously with a depth that is supported). As I thought. I could use XMatchVisualInfo(3) and XCreateColormap(3) to get the matching visual and colormap. But that would add more points of failure (I may get an empty list of matching visuals, and I have no idea of which visual class to try). > On Sat, 20 Jul 2024 14:58:58 -0300 Lucas de Sena <lu...@seninha.org> said: > > I checked how a few iconifying window managers deal with clients > > providing icon pixmap and mask on XWMHints(3). But as far as I could > > understand, fvwm and twm ignores pixmaps with non-default depths; and > > windowmaker creates an XImage from the pixmap and then creates a > > default-depth pixmap back from it. Is the latter approach the most > > correct (or only) one? > > well this is a different thing - that pxiamp is provided by some other client > so you have fairly little choice. it's a bit primitive TBH especially as you > now don't have alpha - this is why the freeddesktop extended hints provide an > icon RGBA data property ... much nicer :) Yes! I have written a pager dockapp before[1] which draws miniatures of the virtual desktops and their top-level windows. I just gave up ICCCM. Too much boilerplate code! I just look at ewmh's _NET_WM_ICON property, and create an XImage from it... way saner. [1]: https://github.com/phillbush/paginator -- Lucas de Sena
