hg: lanai/lanai: 8230287: Use single render encoder per destination for metal

[jayathirth.d.v at oracle.com]

Changeset: 1a5d37eff05e
Author:    jdv
Date:      2019-08-28 17:23 +0530
URL:       https://hg.openjdk.java.net/lanai/lanai/rev/1a5d37eff05e

8230287: Use single render encoder per destination for metal

! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLBlitLoops.m
! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLContext.h
! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLContext.m
! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLRenderQueue.m
! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLRenderer.m
! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLVertexCache.m