Canvas Clip performance

[Kevin Rushforth]

Please file a bug. It might be possible for us to find a workaround, 
although it might also be possible that this is just an unfortunate 
limitation of Intel HD.

-- Kevin


Elric Morgenstern wrote:
> Ok. Maybe the problems I am experiencing now with JavaFX are the reason why
> D3D is not enabled for J2D?
>
> I think Intel Graphics are rather widespread among laptops, so I'm a bit
> surprised at the huge performance drop (from solid 60 FPS to 8 once I use a
> spherical clip shape). I'd think Intel Graphics hardware form part of the
> test set. I'm using a fairly common laptop (especially around business
> circles) Dell Latitude E6410.
>
> Any chance of this being investigated or do you think I will have to settle
> with a workaround?
>
>
> On Fri, Feb 5, 2016 at 1:01 AM, Philip Race <philip.race at oracle.com> wrote:
>
>   
>> On 2/4/16, 2:59 PM, Elric Morgenstern wrote:
>>
>>     
>>> I see. Interesting. Isn't there a switch to toggle it on JDK8?
>>>
>>>       
>> There is no switch that can enable it if it is disabled by 'default'.
>>
>>     
>>> Assuming you are talking about JavaFX, right? Because you were referring
>>> to
>>> Java2D in your reply.
>>>
>>>       
>> No I am talking about 2D. What I meant was that maybe the performance issue
>> is inherent in the card and the only reason it looks OK with Java2D on
>> Intel is
>> that we aren't using anything much at all of the Intel chip and are doing
>> the work
>> on the cpu instead.
>>
>> -phil.
>>
>>
>>
>>     
>>> On Thu, Feb 4, 2016 at 11:52 PM, Philip Race<philip.race at oracle.com>
>>> wrote:
>>>
>>> Java 2D does not (generally) enable D3D on Intel.
>>>       
>>>> We tried for JDK 8 but there were problems and it was disabled again in
>>>> 8u40 I think.
>>>> JDK 9 EA builds (currently) still have it enabled to help get some
>>>> testing
>>>> so
>>>> if you are running an 8ux release you might want to switch to 9 to get a
>>>> fairer comparison.
>>>>
>>>> -phil.
>>>>
>>>>
>>>>
>>>> On 2/4/16, 2:49 PM, Elric Morgenstern wrote:
>>>>
>>>> Hi guys,
>>>>         
>>>>> I've noticed that clipping performance (Canvas GraphicsContext) is
>>>>> extremely bad on an Intel HD graphics chip. One rectangular clip is
>>>>> fine,
>>>>> anything beyond that, or a spherical clip shape, will bring the
>>>>> framerate
>>>>> to its knees.
>>>>>
>>>>> I notice no performance difference on my GeForce system, but on the
>>>>> integrated chip my application is basically insufferable.
>>>>>
>>>>> The same thing performed with Java2D experiences no performance issues
>>>>> on
>>>>> neither system.
>>>>>
>>>>> Any ideas?
>>>>>
>>>>>
>>>>>