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>

1 files changed, 4 insertions, 3 deletions

diff --git a/src/gpu/gl/GrGLPathRendering.cpp b/src/gpu/gl/GrGLPathRendering.cpp
index 85c129f8b0..8a53f88b2c 100644
--- a/src/gpu/gl/GrGLPathRendering.cpp
+++ b/src/gpu/gl/GrGLPathRendering.cpp
@@ -88,11 +88,12 @@ void GrGLPathRendering::onStencilPath(const StencilPathArgs& args, const GrPath*
     gpu->flushColorWrite(false);
 
     GrGLRenderTarget* rt = static_cast<GrGLRenderTarget*>(args.fProxy->priv().peekRenderTarget());
+    GrSurfaceOrigin origin = args.fProxy->origin();
     SkISize size = SkISize::Make(rt->width(), rt->height());
-    this->setProjectionMatrix(*args.fViewMatrix, size, args.fProxy->origin());
-    gpu->flushScissor(*args.fScissor, rt->getViewport(), args.fProxy->origin());
+    this->setProjectionMatrix(*args.fViewMatrix, size, origin);
+    gpu->flushScissor(*args.fScissor, rt->getViewport(), origin);
     gpu->flushHWAAState(rt, args.fUseHWAA, true);
-    gpu->flushRenderTarget(rt);
+    gpu->flushRenderTarget(rt, origin);
 
     const GrGLPath* glPath = static_cast<const GrGLPath*>(path);