Hmmm. I'm very surprised that this change could cause that. All it does is add an additional metadata chunk to the PNG file, which shouldn't have any affect on the image data itself. simple_plot.py works fine for me in GIMP 2.0.5 both before and after this change. Can you verify that this plot was working before the change to save the resolution in the PNG file? If so, can you send me the source for your plot and the PNG file? Also, what version of libpng are you using? (pkg-config --version libpng should display this on most recent Linux distros).
Cheers, Mike Wayne E. Harlan wrote: > Not quite. The figure opens at the correct size in the gimp but all I > see is background - no plot stuff. > > Wayne > > Michael Droettboom wrote: >> This is now added in SVN, and only for the Agg backend(s). It won't >> work with some of the other ways to save PNG files, such as Gdk, Wx >> (non-Agg) and Cairo. If anyone was any thoughts about how to support >> saving the resolution in those backends, please share. >> >> Also note that resolution is saved in "dots per meter" in PNG files, >> so rounding error makes things slightly off -- for instance, 100 dpi >> is shows up as 99.999998 dpi in the GIMP. >> >> Cheers, >> Mike >> >> Michael Droettboom wrote: >>> I'll look into this. I actually made a similar fix on another >>> project I used to work on... It should be theoretically possible, >>> barring any roadblocks from how matplotlib is doing things. >>> >>> Cheers, >>> Mike >>> >>> Wayne E. Harlan wrote: >>>> I would like to follow up on my first response to Bill. It probably >>>> should be a new thread, but I'll start here. When png files are >>>> saved with a DPI=300 argument, and I open them in the Gimp, the dpi >>>> is only 72 (default ?). As I understand it, the dpi setting in the >>>> graphics file tells the application opening it how big to display >>>> it. When I use savefig with a DPI=300 and the plot figure I am >>>> saving was created with figsize=(6,4.5) I expect the figure to open >>>> in word or swriter at the size I specified (6" by 4.5") with the >>>> appropriate number of pixels. However, at present, that does not >>>> happen. The number of pixels in the figure is correct but I have to >>>> resize it manually to get the right size. Can this be fixed ? >>>> >>>> Thanks, >>>> >>>> Wayne >>>> >>>> Bill Dandreta wrote: >>>>> I resolved the problem. It was unrelated to mpl. xv and gimp were >>>>> complied w/o png support. Recompiling with png support resolved the >>>>> problem. >>>>> >>>>> >>>> ------------------------------------------------------------------------- >>>> >>>> This SF.net email is sponsored by: Splunk Inc. >>>> Still grepping through log files to find problems? Stop. >>>> Now Search log events and configuration files using AJAX and a browser. >>>> Download your FREE copy of Splunk now >> http://get.splunk.com/ >>>> _______________________________________________ >>>> Matplotlib-users mailing list >>>> Matplotlib-users@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >>> >> -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
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