[8] Review request for 8028212 Custom cursor HiDPI support

[Alexander Scherbatiy]

   Could you review the updated fix:
     http://cr.openjdk.java.net/~alexsch/8028212/webrev.01/

   - CImage.createFromImage() method is updated to handle 
MultiResolutionImage
   - resizeRepresentations() method is moved from Creator to the CImage 
class
   - nativeResizeImageRepresentations method is renamed to 
nativeResizeNSImageRepresentations in the CImage class
   - ImageReprese-M-tations typo is fixed in the CImage native code

   Thanks,
   Alexandr.

On 12/4/2013 8:24 PM, Anthony Petrov wrote:
> Thanks for the update, Alexander. I understand.
>
> So, my only concerns that remain are:
>
> 1. The membership of the resizeImageRepresentations() method.
>
> 2. The encapsulation of the logic handling the 
> Image/MultiResolutionImage case (see at the bottom of my original 
> message).
>
> -- 
> best regards,
> Anthony
>
> On 12/04/2013 06:59 PM, Alexander Scherbatiy wrote:
>> On 12/3/2013 9:06 PM, Anthony Petrov wrote:
>>> Hi Alexander,
>>>
>>> If we go with this fix, I suggest to move the
>>> CImage.Creator.resizeImageRepresentations() to the CImage class and
>>> make it a member method, so that you don't need to pass a CImage
>>> reference to it as an argument.
>>      I will update this.
>>>
>>> Also, there's the CImage.resize() method already. Why does it not work
>>> for us? Having a specification for both methods (or for one, if the
>>> second is unneeded) might be helpful.
>>
>>       I do not know why, but SetNSImageSize (  [i
>> setScalesWhenResized:TRUE], [i setSize:NSMakeSize(w, h)]) just does not
>> work in this case. The high resolution representation is not chosen on
>>       my Mac OS X with enabled Quartz Debug.
>>
>>      I tried to narrow the problem and write the cocoa code. It is
>> described in https://bugs.openjdk.java.net/browse/JDK-8028212
>>
>>     Thanks,
>>     Alexandr.
>>
>>>
>>> However, I'm not sure if we really want to resize each representation
>>> of an NSImage object to the same size. Why would we want to do that?
>>> In fact, one of the representations might already have the correct
>>> size, and we could use just that whenever we need it w/o wasting
>>> resources on resizing each of them. If there's no representations of
>>> suitable size, then we should choose the closest one and resize just
>>> it to the desired size. Or am I misunderstanding anything?
>>>
>>> Also, in CCustomCursor.getImageData(), could we somehow encapsulate a
>>> part (or all) of the Image vs. MultiResolutionImage logic in the
>>> CImage.Creator class?
>>>
>>> PS. I'm not really an expert in Image handling code. I'd suggest
>>> someone from the 2D team to review this as well. Maybe Jim could help?
>>>
>>> -- 
>>> best regards,
>>> Anthony
>>>
>>> On 12/03/2013 08:32 PM, Alexander Scherbatiy wrote:
>>>>
>>>> Hello,
>>>>
>>>> Could you review the fix:
>>>>    bug: https://bugs.openjdk.java.net/browse/JDK-8028212
>>>>    webrev: http://cr.openjdk.java.net/~alexsch/8028212/webrev.00
>>>>
>>>>    - MultiResolutionImage interface is used from the fix 8011059
>>>>    - NSImage with representations are created for the multi-resolution
>>>> cursor
>>>>    - NSImage representations are rescaled to the base cursor size
>>>>
>>>> Thanks,
>>>> Alexandr.
>>>>
>>