Add GM case for arc truncation error bug
https://codereview.chromium.org/23532082/
git-svn-id: http://skia.googlecode.com/svn/trunk@11466 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/expectations/gm/ignored-tests.txt b/expectations/gm/ignored-tests.txt
index 0cc2bba..a41e7bd 100644
--- a/expectations/gm/ignored-tests.txt
+++ b/expectations/gm/ignored-tests.txt
@@ -21,3 +21,7 @@
## Added by edisonn as part of https://codereview.chromium.org/23851037/
#gradients
+# Added by robertphillips as part of https://codereview.chromium.org/23532082/
+hairlines
+
+
diff --git a/gm/hairlines.cpp b/gm/hairlines.cpp
index d4d142f..fb7258e 100644
--- a/gm/hairlines.cpp
+++ b/gm/hairlines.cpp
@@ -133,6 +133,31 @@
bug2->lineTo(5.5f, 0.5f);
bug2->lineTo(0.5f, 0.5f);
}
+
+ {
+ // Arc example to test imperfect truncation bug (crbug.com/295626)
+ static const SkScalar kRad = SkIntToScalar(2000);
+ static const SkScalar kStartAngle = SkFloatToScalar(262.59717f);
+ static const SkScalar kSweepAngle = SkScalarHalf(SkFloatToScalar(17.188717f));
+
+ SkPath* bug = &fPaths.push_back();
+
+ // Add a circular arc
+ SkRect circle = SkRect::MakeLTRB(-kRad, -kRad, kRad, kRad);
+ bug->addArc(circle, kStartAngle, kSweepAngle);
+
+ // Now add the chord that should cap the circular arc
+ SkScalar cosV, sinV = SkScalarSinCos(SkDegreesToRadians(kStartAngle), &cosV);
+
+ SkPoint p0 = SkPoint::Make(kRad * cosV, kRad * sinV);
+
+ sinV = SkScalarSinCos(SkDegreesToRadians(kStartAngle + kSweepAngle), &cosV);
+
+ SkPoint p1 = SkPoint::Make(kRad * cosV, kRad * sinV);
+
+ bug->moveTo(p0);
+ bug->lineTo(p1);
+ }
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {