[yocto] Webkit2gtk opengl issue

Mon Oct 12 09:03:37 PDT 2015

On Mon, Sep 28, 2015 at 11:51 AM, Mark O'Donovan <shiftee at eircom.net> wrote:
> On Fri, Sep 25, 2015 at 10:01 PM, Trevor Woerner <twoerner at gmail.com> wrote:
>> On 09/23/15 07:53, Mark O'Donovan wrote:
>>> I am working on an am335x based project, with a webkitgtk
>>> program on the screen, displaying a simple webpage.
>>>
>>> I want to use a standard yocto kernel, which I believe
>>> means I must do without the SGX hardware acceleration
>>> until an open-source driver is available.
>>
>> You need to use whatever kernel the accelerated drivers were written
>> against. Sometimes that can be fairly recent, other times: not so much.
>>
>>> Thus in fido I had added opengl to DISTRO_FEATURES_remove
>>> This worked with webkitgtk 1.x
>>>
>>> The webkitgtk 2.x recipe  also specifies opengl as optional.
>>> However it depends on gtk+3 which depends on libepoxy
>>> which requires virtual/egl.
>>
>> For ARM SoCs/boards that have mali (which isn't your case, but is mine),
>> the user-space binary-only mali drivers PROVIDE egl, so it is possible
>> for me to build libepoxy with DISTRO_FEATURES_remove = "opengl" and the
>> mali test app and x11 server both build and run correctly.
>>
>>> Is this an oversight??
>>>
>>> Is it possible to build webkit 2.x without opengl??
>>
>> I don't know. But in the mali case it is possible to have mali provide
>> egl/gles1/gles2 and have mesa-gl provide an opengl-only solution as a
>> fall-back for any non-egl/gles1/2 apps (or at least theoretically it is).
>>
>> Hope this helps.
>
>
>
> Thanks Ross, Trevor,
>
> With webkitgtk 1.8 I was having issues with opengl present.
> It seems not to be the case here.
> My screen is completely blank.
> I have discovered that the page fails to render due to
> javascript.
> Disabling JIT solves this issue.
> The example below fails to render if JIT is enabled.
> It will however render if I uncomment the 'alert' statement.
>
> <!DOCTYPE html>
> <html>
> <head>
> <title>Test</title>
> </head>
> <body>
> <p>Page Rendered</p>
> <script>
>   //alert("JavaScript works")
> </script>
> </body>
> </html>
>
> Is there anything you would like me to test??

So has anyone else come across this??
If not then I will file a bug for JIT in webkitgtk on arm7.

Mark