Add additional case to bigblurs GM

gm/bigblurs.cpp

Index: gm/bigblurs.cpp
===================================================================
--- gm/bigblurs.cpp	(revision 12202)
+++ gm/bigblurs.cpp	(working copy)
@@ -13,9 +13,13 @@
 namespace skiagm {
 
 // This GM exercises the blurred rect nine-patching special cases when the
-// blurred rect is very large and/or very far from the origin.
-// It creates a large blurred rect/rectori then renders the 4 corners and the
-// middle.
+// blurred geometry is very large and/or very far from the origin.
+// It creates large blurred geometry then renders the 4 corners and the middle.
+// The three geometries tested are:
+//          a large rect
+//          a large thin rectorii (inner rect is only 20 inside outer rect)
+//          a large thick rectorii (inner rect is tiny compared to outer rect)
+// This last case is inappropriate for the nine-patch fast path.
 class BigBlursGM : public GM {
 public:
     BigBlursGM() {
@@ -39,11 +43,16 @@
         SkRect insetRect = bigRect;
         insetRect.inset(20, 20);
 
-        SkPath rectori;
+        SkPath thinRectori;
+        thinRectori.addRect(bigRect);
+        thinRectori.addRect(insetRect, SkPath::kCCW_Direction);
 
-        rectori.addRect(bigRect);
-        rectori.addRect(insetRect, SkPath::kCCW_Direction);
+        insetRect.inset(kBig/2-40, kBig/2-40);
 
+        SkPath thickRectori;
+        thickRectori.addRect(bigRect);
+        thickRectori.addRect(insetRect, SkPath::kCCW_Direction);
+
         // The blur extends 3*kSigma out from the big rect.
         // Offset the close-up windows so we get the entire blur
         static const SkScalar kLeftTopPad  = 3*kSigma;   // use on left & up of big rect
@@ -68,7 +77,7 @@
 
         int desiredX = 0, desiredY = 0;
 
-        for (int i = 0; i < 2; ++i) {
+        for (int i = 0; i < kNumGeometryTypes; ++i) {
             for (int j = 0; j < SkBlurMaskFilter::kBlurStyleCount; ++j) {
                 SkMaskFilter* mf = SkBlurMaskFilter::Create((SkBlurMaskFilter::BlurStyle)j,
                                                             kSigma);
@@ -89,9 +98,12 @@
 
                     if (0 == i) {
                         canvas->drawRect(bigRect, blurPaint);
+                    } else if (1 == i) {
+                        canvas->drawPath(thinRectori, blurPaint);
                     } else {
-                        canvas->drawPath(rectori, blurPaint);
+                        canvas->drawPath(thickRectori, blurPaint);
                     }
+
                     canvas->restore();
                     canvas->drawRect(clipRect, outlinePaint);
 
@@ -105,9 +117,12 @@
     }
 
 private:
+    static const int kNumGeometryTypes = 3;
     static const int kCloseUpSize = 64;
     static const int kWidth = 5 * kCloseUpSize;
-    static const int kHeight = 2 * SkBlurMaskFilter::kBlurStyleCount * kCloseUpSize;
+    static const int kHeight = kNumGeometryTypes * 
+                               SkBlurMaskFilter::kBlurStyleCount * 
+                               kCloseUpSize;
 
     typedef GM INHERITED;
 };