RFR: 6176679: Application freezes when copying an animated gif image to the system clipboard

[Rajat Mahajan]

On Mon, 10 Apr 2023 21:32:30 GMT, Rajat Mahajan <rmahajan at openjdk.org> wrote:

> **Problem:**
> 
> On pressing the Copy button we keep waiting in AWT-EventQueue thread in reconstruct() function as we detect that we have missing information for the animated image since we are copying single frame at a time.
> Due to this infinite wait the application freezes.
> 
> **Proposed Fix:**
> 
> There are conditions in the reconstruct() function that avoid entering the wait() code if we have some error reading the image , etc. So, I added the condition to avoid entering the wait() code if we are copying single frame at a time. This sounded logical to me since if we have incomplete information(single frame) about the animated image we shouldn’t keep waiting, as it leads to infinite wait. 
> After this change I see the GIF image being correctly copied and animated.
> 
> 
> **Testing:**
> 
> Added a test for this (bug6176679.java) and tested locally on my Windows machine and on mach5.

Made changes requested by the reviewers. Now we read animated gif image from byte array.
Thanks @aivanov-jdk for the help with this.

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PR Comment: https://git.openjdk.org/jdk/pull/13414#issuecomment-1509367937