This PR fixes an issue exclusively seen on Apple M1 systems when SwingSet2 demo is run with uiScale=1.0.
**Issue :** SwingSet2 Demo - As reported in JBS description J2DDemo - As reported in a comment on JBS **Root Cause :** DrawPixel path is used only with uiScale=1.0. MTLPrimitiveTypePoint is used to draw a pixel while encoding a render command. As mentioned in the documentation - https://developer.apple.com/documentation/metal/mtlprimitivetype/mtlprimitivetypepoint?language=objc "The vertex shader must provide [[point_size]], or the point size is undefined." In our shader functions, we do not define this point size. It is harmless on x86_64 based mac systems, but causes visual artifacts on M1 mac systems. **Solution :** Explicitly define point size in shader functions that draw MTLPrimitiveTypePoint. ------------- Commit messages: - r Changes: https://git.openjdk.java.net/jdk/pull/4356/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4356&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8266159 Stats: 6 lines in 1 file changed: 6 ins; 0 del; 0 mod Patch: https://git.openjdk.java.net/jdk/pull/4356.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/4356/head:pull/4356 PR: https://git.openjdk.java.net/jdk/pull/4356
