Re: Rendering bug when using operator "source" (ver. 1.12)
Chris Wilson <[email protected]>
| Newsgroups | gmane.comp.lib.cairo |
|---|---|
| Message-ID | <1332979234_134037@CP5-2952> |
On Wed, 28 Mar 2012 18:10:29 -0400, cu <[email protected]> wrote: > Resolution would be greatly appreciated, as at this point we have to use > operator "over" instead, resulting in un-needed overhead. I should point out that the output is different between OVER and SOURCE in this case. Along the partially filled top edge, using SOURCE the edge is going to be blend with CLEAR (the operation is implicitly clearing the destination before adding the source on top) whereas with OVER that edge is blended by the inverse-coverage factor with the existing content. Ideally the only performance difference would be when applying the antialiased edge - we're not quite there, but it should be fairly close. -Chris -- Chris Wilson, Intel Open Source Technology Centre -- cairo mailing list [email protected] http://lists.cairographics.org/mailman/listinfo/cairo