Hi Martin, Just to let you and the list know: Jeremy has pulled my Git branch with the improvement for TIFF compression and a (unrelated) bugfix to get PNG compression working again. Both will be in the next release of Veusz, or can be gotten now if you build from the development tree.
Regards, --BKS On 5/15/2015 3:55 AM, Martinus WERTS wrote: > Thanks to all! > > We had a similar question for the PNG format. I guess/hope the proposed > change will also enable compression for PNG. > > Best wishes, > Martin > > On 15/05/2015 03:16, Benjamin K. Stuhl wrote: >> On 5/14/2015 11:15 AM, Mike Statkus wrote: >>> Many thanks to Jeremy for the outstanding plotting tool! >>> >>> Is it intended that TIFF export produces images without compression? >>> 16*12 >>> cm figure at 300 dpi (1800*1400 pixels) is saved by Veusz export as a 10 >>> Mb TIFF, which is reduced to 300 Kb TIF after opening with Photoshop and >>> saving as TIF with LZW compression enabled. Unfortunately, I haven't >>> found >>> an option in Veusz 1.23 to turn on LZW or ZIP compression in TIF files. >> You're right, Veusz does not seem to turn on TIFF compression. The good >> news is that it should be trivial to fix, the QImageWriter just needs >> writer.setCompression(1) >> called on it. I'll try to put together a pull request next week if >> Jeremy doesn't do a fix first. >> >> We might also want to set >> writer.setOptimizedWrite(true) >> writer.setProgressiveScanWrite(true) >> for new Qt versions that will support them; this improves the JPEG >> output file sizes. (See https://bugreports.qt.io/browse/QTBUG-20075, >> which was merged for 5.5.) >> >> Regards, >> --BKS >> >> >> _______________________________________________ >> Veusz-discuss mailing list >> Veusz-discuss@gna.org >> https://mail.gna.org/listinfo/veusz-discuss > > > _______________________________________________ > Veusz-discuss mailing list > Veusz-discuss@gna.org > https://mail.gna.org/listinfo/veusz-discuss _______________________________________________ Veusz-discuss mailing list Veusz-discuss@gna.org https://mail.gna.org/listinfo/veusz-discuss
