From 06f6a987069549ba6e8a0bc7b4924cdfc36a1374 Mon Sep 17 00:00:00 2001
From: Jason Simmons <jason-simmons@users.noreply.github.com>
Date: Thu, 10 Aug 2017 13:23:35 -0700
Subject: [PATCH] Apply antialiasing in calls to SkCanvas::clipRect (#3973)

Without this, the cull rect calculated by an SkPicture may be truncated
to integer pixel coordinates.  The raster cache relies on a precise cull
rect in logical coordinates.

See https://bugs.chromium.org/p/skia/issues/detail?id=6954
---
 lib/ui/painting/canvas.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ui/painting/canvas.cc b/lib/ui/painting/canvas.cc
index ea9810afc5868..84b5cfd1924d4 100644
--- a/lib/ui/painting/canvas.cc
+++ b/lib/ui/painting/canvas.cc
@@ -157,7 +157,7 @@ void Canvas::transform(const tonic::Float64List& matrix4) {
 void Canvas::clipRect(double left, double top, double right, double bottom) {
   if (!canvas_)
     return;
-  canvas_->clipRect(SkRect::MakeLTRB(left, top, right, bottom));
+  canvas_->clipRect(SkRect::MakeLTRB(left, top, right, bottom), SkClipOp::kIntersect, true);
 }
 
 void Canvas::clipRRect(const RRect& rrect) {