check for culled-out paths inside SkDraw

src/core/SkDraw.cpp

Index: src/core/SkDraw.cpp
diff --git a/src/core/SkDraw.cpp b/src/core/SkDraw.cpp
index efc43d2e8080df0a7395ddb52b1c46400527c25e..8899a109abac1bc7e93aaccfcabfea79b176cbd8 100644
--- a/src/core/SkDraw.cpp
+++ b/src/core/SkDraw.cpp
@@ -1017,6 +1017,19 @@ SkScalar SkDraw::ComputeResScaleForStroking(const SkMatrix& matrix) {
 
 void SkDraw::drawDevPath(const SkPath& devPath, const SkPaint& paint, bool drawCoverage,
                          SkBlitter* customBlitter, bool doFill) const {
+    // Do a quick-reject test, since a looper or other modifier may have moved us out of range.
+    {
+        // outset 1 in case we're antialiasing
+        SkRect clipBounds = SkRect::Make(fRC->getBounds()).makeOffset(1, 1);

[f(malita), 2016/07/18 16:34:15]

makeOutset()

+
+        if (paint.getMaskFilter()) {
+            paint.getMaskFilter()->computeFastBounds(clipBounds, &clipBounds);
+        }
+        if (!clipBounds.intersects(devPath.getBounds())) {
+            return;
+        }
+    }
+
     SkBlitter* blitter = nullptr;
     SkAutoBlitterChoose blitterStorage;
     if (nullptr == customBlitter) {