Carl Worth wrote: > On Thu, 12 Jul 2007 10:31:19 -1000, Eric Firing wrote: >> if only cairo would make eps files > > Isn't EPS a trivially change compared to PS? Something like a modified > header and the addition of bounding-box information?
Carl, My knowledge of graphics topics is sketchy, but yes, in many cases the difference between PS and EPS is just a few lines. This is true for Matlab files--ps and eps are identical except for something like 3 lines. This works *provided* the ps file doesn't have anything in it that is not allowed in eps. I don't recall the constraints, apart from the file being single-page, but I know there are some. I suspect this is not a problem for cairo output, but I haven't tried to check. > > It sounds like something that should be really easy to change in > cairo. Yes, so much so that I don't understand why it is not already done. (I know you are a cairo dev--is there not a postscript specialist in the cairo dev community?) > > Maybe you could take a cairo-generated .ps file and manually munge it > into the .eps that you'd like? If you did that, I'd be glad to write > the necessary cairo code to get the same result, (and come up with > whatever tiny new API is necessary to instruct cairo to do that). If no one else steps forward, I can try to look at it fairly soon--but I am really not the right person to do it. > > As for the rest of what you say. From my point of view, yes, using > cairo and its multi-backend capabilities seems to make a fair amount > more sense than inventing a new system with multiple backends. (Not a > criticism against the original MPL stuff---cairo 1.0 has only existed > since August 2005). > > But yeah, I also understand that there are licensing concerns. > Anything else? Are there cairo performance concerns? If so, I'd love > to hear about them so we can fix them. Well, I think that for screen display and for png generation, Agg is significantly faster. Backend_driver.py gives Backend agg took 0.76 minutes to complete Backend cairo.png took 0.95 minutes to complete Backend template took 0.46 minutes to complete I haven't tried to test it, but I suspect that for some types of plots the optimizations in Agg and the agg backend will make a much bigger difference than the averages above would indicate. Eric > And even if you don't use cairo directly, I will offer the suggestion > of its drawing model as being very good, (using source and mask > pattern objects and just 5 different drawing operations: stroke, fill, > paint, show_text/glyphs, and mask). > > Whatever you decide to go with, have fun! > > -Carl ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
