hg: jdk/sandbox: Initial implementation of vertex cache for text rendering

[jayathirth.d.v at oracle.com]

Changeset: 68ec5c5ae381
Author:    jdv
Date:      2019-06-25 16:21 +0530
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/68ec5c5ae381

Initial implementation of vertex cache for text rendering

! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLTextRenderer.m
! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLVertexCache.h
! src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLVertexCache.m