sksl: Add a "sk_Clockwise" built-in
This allows us to identify clockwise-winding triangles, in terms of
Skia device space, in all backends and with all render target origins.
Bug: skia:
Change-Id: I220e1c459e0129d1cc4dee6458ef94277fbedd21
Reviewed-on: https://skia-review.googlesource.com/142662
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
diff --git a/gn/gm.gni b/gn/gm.gni
index 587f83b..e146b1f 100644
--- a/gn/gm.gni
+++ b/gn/gm.gni
@@ -70,6 +70,7 @@
"$_gm/clip_strokerect.cpp",
"$_gm/clipdrawdraw.cpp",
"$_gm/clippedbitmapshaders.cpp",
+ "$_gm/clockwise.cpp",
"$_gm/color4f.cpp",
"$_gm/coloremoji.cpp",
"$_gm/coloremoji_blendmodes.cpp",