<AWT Dev> RFR: 8266079: Lanai: AlphaComposite shows differences on Metal compared to OpenGL

Tue Jun 1 20:36:10 UTC 2021

On Wed, 26 May 2021 13:49:24 GMT, Alexey Ushakov <avu at openjdk.org> wrote:

> Set black color for underlying window background to perform correct blending operations in metal with window surface destination

I guess the bug happens when we blit our "layer" surface to the window? So there is no way to set a kind of "src" composite? Will it help if you "clear" the layer to some color(white?) and then immediately blit the content on top of it?

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PR: https://git.openjdk.java.net/jdk/pull/4206