The image illustrating the aliasing problem is: https://www.dropbox.com/s/r1hlmpwuagdq8cj/hatch_rendering_zoom.png
Do you have an idea of the performance of these options?
I think the main concern here is memory usage. In solution 2 if we had a hatch - filled object occupying whole canvas (let's say 1500x1000px) the cairo pattern surface would take up 5.7MB. The question is if this can be accepted. I'm not sure but I suppose masks and clip paths work this way. The performance of third option does not really differ from what we have in current code. I'll have to play a bit with it to check if results are satisfactory. I think it would be beneficial to turn off antialiasing when rendering the oversampled image. It it possible to do so?
By the way, how can I get to know what SVG area is displayed on canvas?
Can pattern rendering be handled the same way?
Patterns and hatches share the rendering code. They can be handled the same way.
I don't see a way to cleanly export an arbitrary SVG 2 hatch fill/stroke to any of these formats, since they do not have user defined hatch patterns, only pre-defined hatch patterns.
What if I added a hatch palette "WMF" representing the six predefined WMF hatches? They could have an specific attribute like inkscape:wmf-type specifing the hatch type. Any other hatches could be treated as patterns.
As for other file formats, except .dwg, I think it should be safe to convert hatches to patterns for output.
Regards, Tomasz
On Tue, Aug 5, 2014 at 6:26 PM, Tavmjong Bah <tavmjong@...8...> wrote:
Attached...
On Tue, 2014-08-05 at 13:16 -0300, Felipe Sanches wrote:
Same here. I'm also interested in taking a look at this test file.
On Tue, Aug 5, 2014 at 1:12 PM, Josh Andler <scislac@...400...> wrote: All I saw was your reply to him. Nothing directly from him or via the list in my inbox or spam folder.
Cheers, Josh On Tue, Aug 5, 2014 at 9:09 AM, Tavmjong Bah <tavmjong@...8...> wrote: On Tue, 2014-08-05 at 08:56 -0700, Josh Andler wrote: > On Tue, Aug 5, 2014 at 7:54 AM, Tavmjong Bah <tavmjong@...8...> wrote: > On Tue, 2014-08-05 at 16:15 +0200, Tomasz Boczkowski wrote: > > I've implemented the rendering of SVG2 hatches > > in lp:~penginsbacon/inkscape/svg-paints-support. How it > works can be > > seen using a test file attached to this message. The > rectangles in > > left columns are filled with hatches, while the ones in > right columns > > are reference images consisting of clipped paths. > > > Would one of you be willing to share the test file? Look at the attachment to Tomasz's email... Tav
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