Christopher Barker wrote: > Michael Droettboom wrote: > >> Creates a wx.GraphicsContext from a native context. This native >> context must be eg a CGContextRef for Core Graphics, a Graphics >> pointer for GDIPlus or a cairo_t pointer for Cairo. NOTE: For >> wxPython we still need a way to make this value usable. > > If we really think that would help, and we would use it for MPL, we > could try to get it done -- but I doubt that it's worth it -- we have > enough trouble keeping the wx back-ends maintained as it is. Yes --- there is something to be said for keeping the number of backends to a minimum. Each one needs to have a reason to exist ;) > >>> If you can come up with an self-contained example of this, a post >>> tot he wxPython list may yield results. >>> >> It might be worth it just to get to the bottom of this. > > so are you working on an example? Or should I? I'm happy to do it, but may not get to it for a few days. My own test was to run "simple_plot_fps.py" with "handle_clip_rectangle" (in backend_wx.py) turned on and off. But obviously the wxPython folks will want a more standalone example. > >> I think the best we'll be able to do performance-wise with >> wx.GraphicsContext is the same as the Cairo backend (since >> wx.GraphicsContext is built on top of Cairo on X11, at least) > > so, does Cairo render a bitmap, and then push that to the X Server? If > so, that would explain why the new wx backend isn't any better than > wxAgg with remote X connections -- and that's was the only reason I > know to use it. I believe it does from what I've read (assuming one isn't using the OpenGL backend), but don't know that first hand. > >> already slower than Agg, so there's no compelling reason for the Wx >> backend to exist, IMHO, *unless* it needs to integrate with other >> code that draws to a wx.GraphicsContext. > > I cant really imagine why anyone would try to do that -- and if you > really wanted to, you could still transfer the Agg buffer to a > wxBitmap, and draw to that with GraphicsContext anyway. True. > > So, like you, I'm curious (and I need GraphicsContext for other > projects), so I'd still like to know what the deal is. > Thanks for all the info so far... Hopefully we can get to the bottom of this.
Cheers, Mike -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
