<div dir="ltr"><div>> Traditionally this project has been extremely conservative.<br><br></div><div>That depends on what you mean by "extremely conservative". When the pixman git repository was originally set up, everybody with commit access to cairo and xorg got commit access to pixman as well. All of these people still have commit access as far as I am aware. So lots of people have the permissions to make changes to the pixman repository.<br><br></div><div>But if you mean "social" commit access, pixman has indeed been strict about requiring review and about keeping the bar high for code quality.<br><br>I don't know if they were widely know, but the rules were that if you had commit access, then you should send your patches to the mailing list, and if you got no response for a couple of days, you should feel free to push. In practice this meant that Siarhei, Matt and I had commit access after sending patches to the mailing list. Patches from everybody else would be reviewed thoroughly.<br><br><div>Setting a high bar for code quality was a result of my experience with the code: Pixman was created in 2007 as the merging of a three-way fork of the Render parts of the X server framebuffer code, one from cairo, one from Keith's X server, and one from the Xorg xserver. All of these forks had acquired lots of garbage code, and the merged pixman had merged all that of that and itself become garbage. Lots of this garbage had been written by well-known names in the community (and yes, a good chunk of it had been written by me).<br><br></div>When I say "garbage" I mean code that simply didn't work, and only worked in the one case that the author cared about when writing the code. I don't mean formatting or minor code structuring issues. This basically still applies, although today there is perhaps a handful of people I would trust to write good pixman code. This is not unique to pixman btw. The X server project also moved away from a free-for-all to a model where Keith is the final arbiter of what goes in. And of course the kernel has always done this.<br><div><div><br>As an example, one of the first contributions to the merged pixman was another
mountain of garbage ARM code that went in without much review. This code
simply didn't work - it had memory corruption issues and did handle premultiplication right. It also had various arithmetic
bugs. (Siarhei and Ben Avison have since then written high-quality ARM
backends).<br></div><div><br></div>The lesson for me was that most people simply could not be trusted to
write decent pixman code, and that all patches therefore had to be
carefully reviewed before going in. <br><br></div><div class="gmail_extra">The result of this policy is that pixman is now remarkably bug free and stable compared to almost any other open source library, and that the few recurring contributors that pixman got are all extremely good. But the downside is that pixman possibly did not evolve as quickly as it could have. and that I eventually burned out reviewing all these patches.<br><br>If pixman will now be turned into a free-for-all again, the risk is that it slowly turns back into a mountain of garbage. I don't know if that is better than being stable, bug free and moribund.<br><br><br></div><div class="gmail_extra">Søren<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jun 12, 2018 at 3:29 AM, Pekka Paalanen <span dir="ltr"><<a href="mailto:ppaalanen@gmail.com" target="_blank">ppaalanen@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
what are the criteria to give out commit access to Pixman?<br>
As I could give access, I should probably have an idea when.<br>
<br>
I see Maarten already got his, and there is another asking for it,<br>
but no discussion about them at all that I remember seeing.<br>
<br>
Traditionally this project has been extremely conservative. Are things<br>
finally changing? Does someone have some great plans to revitalise the<br>
project?<br>
<br>
<br>
Thanks,<br>
pq<br>
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