> It might work to drop a repaired "libpangocairo.so" into the "lib" > directory of your Racket installation. I'll see if I can build one, > just to see how hard that is. :)
I made the problem go away by building libpango from source and putting the just-built libpango, libpangocairo, libpangoxft, and libpangoft libraries into LD_PRELOAD. I can definitely make a shell script that does this before launching slideshow as a temporary workaround. Building libpango from scratch was really easy - download, extract, ./configure, make. This looks like it will work! Thanks! >> What about working around it by making slideshow's instances of >> racket/gui think that I'm not on a high-res display, so that it uses 1.0 >> as the backing scale? I've tried setting GDK_SCALE=1 and >> GDK_DPI_SCALE=1, but I still see the issue. > > You could set PLT_DISPLAY_BACKING_SCALE=1, but I think that won't help, > because Slideshow will still scale the content to match the screen size > (so it should arrive at the same overall scale factor). This doesn't fix it, unfortunately, as you predicted. > Can you set your laptop's screen to 1024x768 resolution? Then there > would be no scaling. It seems like that might happen anyway when > connecting to a projector, but I don't know well enough how changing > the display works with Unix/X. Setting it to 1024x768 fixes the text display, consistent with expectations. I'm not confident that I can run our projectors at precisely that resolution, however, so I don't want to rely on that specifically! But I think the LD_PRELOAD hack is good enough for what I need it to do, and I'll test extensively beforehand for stability. > In another direction, you could disable kerning by adjusting your font > description to include 'no-combine: > > (parameterize ([current-main-font (cons 'no-combine (current-main-font))]) > (slide > (para "Types"))) That makes it ugly, but not quite as ugly as the over-the-top kerning. I'll keep it in mind in case the LD_PRELOADed libpango causes some other issue, as a potential last-minute fix if I've invested all my prep time into an interactive Racket-Idris-slideshow thing that I don't have time to replace at the last minute, and my other machine running stretch doesn't work for some reason. Thanks so much for fast and effective support turn-around! I really appreciate it, and the sinking feeling in my gut has left. /David -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
