On Wed, 30 Jun 2021 04:00:54 GMT, Jayathirth D V <j...@openjdk.org> wrote:
>> src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLLayer.m line 286:
>>
>>> 284: if (layer == NULL || ctx == NULL) {
>>> 285: J2dTraceLn(J2D_TRACE_VERBOSE, "MTLLayer_blit : Layer or
>>> Context is null");
>>> 286: [layer stopDisplayLink];
>>
>> What happens if we exit before this "blitTexture" is called? Do not we need
>> to stop(w/o possibility to restart it) that thread on toolkit shutdown or
>> something like this?
>
> At this point if we exit, we just return and unlock MTLRenderQueue for
> backbuffer rendering. And when it is done we again start CVDisplayLink in
> MTLRenderQueue which in turn calls setNeedsDisplay to get callback to
> MTLLayer.display().
>
> This scenario is same as returning from CGLLayer.blitTexture() when textureID
> is 0. Appkit thread will be running in the background and we dont stop it.
No, I meant if we dispose the frame/exist from the app/etc before
"Java_sun_java2d_metal_MTLLayer_blitTexture" method is executed but after we
call "startDisplayLink", when we will call the stopDisplayLink in this case?
-------------
PR: https://git.openjdk.java.net/jdk17/pull/175
