<AWT Dev> <Swing Dev> [10] Review request for 8182043: Access to Windows Large Icons

Sergey Bylokhov Sergey.Bylokhov at oracle.com
Thu Oct 12 20:39:54 UTC 2017

On 06/10/2017 17:16, Semyon Sadetsky wrote:
>> The maximum icon which we used before you fix is 32pixel's icon(yes it 
>> is a large icon), and 128 is a size of this icon on 4k monitor( The 
>> windows can return a 128pixel's icon on 4k monitor) The EXTRA_LARGE 
>> and JAMBO was not used in our code.
> So, it is not supposed to work on 8k monitor? Why we should have this 
> limit while the native platform hasn't it?

This is my understanding, before those fix the maximum size was 32x32.

>>> But these constants are related to the predefined system icon sizes 
>>> while the Extract() may scale icon to any size.
>> Does it really scale for any size?
>> For example if I request the icon for some pdf,java,txt files of size 
>> 100 then:
>>   - On HiDPI screen I get the native icon of size 64.
>>   - On LowDPI screen I get the native icon of size 32.
>> In both cases the user will get MRI, which will scale the native icon.
>> http://mail.openjdk.java.net/pipermail/awt-dev/2017-October/013179.html
> Why returning MRI is wrong?

The MRI is good, if this is what the user is expected. My point was that 
the native system is not scale the icon and the user gets MRI which 
content is unrelated to the passed "size".

> Which calls are you talking about DPI-aware 
> or DPI-unaware?

This is jdk10client + the current patch.

Best regards, Sergey.

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