<AWT Dev> [OpenJDK 2D-Dev] Review request for 8029339 Custom MultiResolution image support on HiDPI displays

Alexander Scherbatiy alexandr.scherbatiy at oracle.com
Fri Aug 28 13:43:56 UTC 2015

  Could you review the updated fix:

    - The javadoc for MultiResolutionImage interface is updated.

On 8/26/2015 1:45 AM, Phil Race wrote:
> On 08/25/2015 02:26 PM, Jim Graham wrote:
>> Is MRI intended to be implemented only by classes that extend 
>> java.awt.Image?  I think that's the only place we look for it.  If 
>> so, then we should state that. Perhaps:
>> ---------
>> This interface is designed to be an optional additional API supported 
>> by some implementations of {java.awt.Image} to allow them to provide 
>> alternate images for various rendering resolutions.  The various 
>> {Graphics.drawImage} variant methods will consult the methods of this 
>> interface if it is implemented on the argument {Image} object in 
>> order to choose the best representation to use for each rendering 
>> operation.
>> <p>
>> The {MRI} interface should be implemented by any subclass of 
>> {j.a.Image} that ...(existing text)... given image width and height.  
>> For convenience, toolkit images obtained from {...} will implement 
>> this interface on platforms that support naming conventions for 
>> resolution variants of stored image media and the {Abstract} and 
>> {Base} classes are provided to facilitate easy construction of custom 
>> multi-resolution images from a list of related images.
>> ---------
>> Should we list the naming conventions that we support (mainly just 
>> "@2x"?), or should that be listed in the documentation of the various 
>> getImage() and createImage() methods?
> Here I think so as to keep it all together.
      I have filed and issue on it: JDK-8134670 Add documentation for 
@2x images loading on Mac OS X
> The code itself seems fine so we are just discussing docs although I
> also have a comment on the tests.
> Jim observed elswhere that the tests use internaI APi.
> I wish the tests were not doing so at all but I notice sun.awt.OSInfo 
> used
> in one file and then another file uses jdk.testlibrary.OSInfo which seems
> to be a jtreg copy to avoid that internal dependency.
> Really I don't like either of these. You can work out if its OSX with one
> line of code rather than introducing a dependency.

    I have updated the tests to use only jdk.testlibrary.OSInfo.


> -phil.
>> On 8/19/15 4:51 AM, Alexander Scherbatiy wrote:
>>>    Hello,
>>>   Could you review the updated fix:
>>> http://cr.openjdk.java.net/~alexsch/8029339/webrev.12
>>>    - Comment about nonempty return list is added for
>>> MultiResolutionImage.getResolutionVariants() method
>> That comment has a blank line.  If it is supposed to be 2 paragraphs 
>> then I think you need a <p> tag, otherwise the blank line should 
>> probably be removed (I don't need to see a webrev for that).
>> The rest looks fine...
>>             ...jim

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