RFR: 8271398: GTK3 drag view image swaps red and blue color channels

[Kevin Rushforth]

On 8/7/2021 11:56 AM, Pankaj Bansal wrote:
> On Fri, 6 Aug 2021 20:44:23 GMT, Thiago Milczarek Sayao <tsayao at openjdk.org> wrote:
>
>>> I will look at this. Meanwhile, could you please write an automated system test for this?
>> Sure, I would provide it, but in the past drag and drop tests were not possible. Any ideas?
> I think it should be possible to write an automated testcase in this case. Find center of window, move mouse to the location and do mouse click (without release). Then move mouse out of window to some location. Afterwards, get the pixel color at mouse location and do mouse release. Looks like it should be possible. Please let me know if there is some problem, I will also try to write one on my end.

If this does turn out to be too complex, we can file a new JBS issue to 
track adding an automated test. In which case, a manual test could be 
added as part of this PR.

-- Kevin