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Dmitry Kazakov authored
It seems like Qt uses some internal caches/textures for painting pixmaps/images on screen. And if the images of one rendering cycle don't fit into that cache they are painted and black rectangles. There is a workaround for that: just make the size of the pixmap cache more than 20 MiB. Then all the pixmaps painted through the cache will work correctly (if you decide to draw a QImage on screen manually, it still doesn't work). I don't know what happens there, but it seems like this workaround fixes the problem. Let's wait until we merge Qt+openGL3 branch, probably, it will change something. BUG:361709
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