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We've successfully used cairo in an iOS app that was available in the
appstore for several years. There is nothing in Apple appstore TOS that
prevents one from using cairo (or any other such library), and we
passed multiple appstore reviews without issues directly related to
However, cairo support for iOS was tenuous at best. In particular,
there was never an official optimized pixman release (using ARM
optimizations), ostensibly because it was designed for Android/Linux
toolchain and there was no one interested in taking on a proper port to
iOS toolchain. There was a one-off prebuilt set of ARM optimizations
for a 32 bit platform, that we've used for a while.<br>
In addition, due to the way Quartz backend was built in older versions,
it required a use of certain hacks to avoid referencing deprecated API.
This was presumably remediet in later versions of cairo, unfortunately
they had several other regressions and we never moved to newer version
at that time.<br>
Since iOS now requires all applications to support 64 bit platform, and
there is no corresponding optimized pixman version for 64 bit ARM (same
issues as previously for 32 bit), we were only able to build a
non-optimized 64 bit cairo/pixman combination for iOS. The resulting
product performance was inadequate and stability suffered, so it was
not made production - and application was subsequently withdrawn last
I.e., in my experience, cairo can be built for iOS with non-trivial
effort. The resulting library will be constrained in both performance
and stability compared to other officially supported platform versions.<br>
Guillermo Rodriguez wrote:
<pre wrap="">2017-01-20 10:32 GMT+01:00 Lawrence D'Oliveiro <a class="moz-txt-link-rfc2396E" href="mailto:email@example.com"><firstname.lastname@example.org></a>:
<pre wrap="">On Fri, 20 Jan 2017 09:42:02 +0100, Guillermo Rodriguez wrote:
<pre wrap="">2017-01-19 21:17 GMT+01:00 Lawrence D'Oliveiro:
<pre wrap="">On Thu, 19 Jan 2017 11:45:48 +0100, Guillermo Rodriguez Garcia
<pre wrap="">Why wouldn't it be allowed?
<pre wrap="">Because Apple.
<pre wrap="">If you want to make a point, you may want to be more specific.
<pre wrap="">“Other reasons” (42% of rejections)
<a class="moz-txt-link-rfc2396E" href="http://arstechnica.com/apple/2014/09/apple-lays-out-the-most-common-reasons-for-app-store-rejections/"><http://arstechnica.com/apple/2014/09/apple-lays-out-the-most-common-reasons-for-app-store-rejections/></a>.
As I said they may reject any application arbitrarily, but there is
nothing in the link you provided that would suggest that specifically
using Cairo would result in an application being rejected.