8u40 review request: RT-37793 performance problems in Canvas temp and clip buffers

[Hervé Girod]

I was not aware of that. Thanks for the information!

Sent from my iPhone

> On Jul 11, 2014, at 0:43, Jim Graham <james.graham at oracle.com> wrote:
> 
> Hi Herve,
> 
> This particular bug has nothing to do with rectangular clipping, this is improving shape clipping instead.
> 
> Also, the fix involved actually isn't really any change to the clipping.  It just so happens that the clipping code in Canvas was the heaviest user of the code that clears the temp buffer (isolated to Canvas) that was not using the fastest clear method.
> 
> The node clipping code uses an entirely different implementation that relies on the Decora effect code which already does the clears in the optimal way...
> 
>            ...jim
> 
>> On 7/10/14 12:34 PM, Hervé Girod wrote:
>> Hello, I have a question about this (sorry if you explained it before): does rectangular clipping on regular Nodes has / had the same performance problems than with the Canvas?
>> 
>> Hervé
>> 
>> Sent from my iPhone
>> 
>>> On Jul 10, 2014, at 21:19, Jim Graham <james.graham at oracle.com> wrote:
>>> 
>>> Jira: http://cr.openjdk.java.net/~flar/RT-37793/webrev.00/
>>> webrev: http://cr.openjdk.java.net/~flar/RT-37793/webrev.00/
>>> 
>>>            ...jim