Support rrect clips in analysis canvas

skia/ext/analysis_canvas_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/compiler_specific.h"
+#include "base/macros.h"
 #include "skia/ext/analysis_canvas.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkPicture.h"
 #include "third_party/skia/include/core/SkPictureRecorder.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 #include "third_party/skia/include/core/SkShader.h"
 #include "third_party/skia/include/effects/SkOffsetImageFilter.h"
 
 namespace {
 
@@ skipping 365 matching lines @@
   canvas.clipRegion(region);
   EXPECT_FALSE(canvas.GetColorIfSolid(&outputColor));
 
   canvas.restore();
   EXPECT_FALSE(canvas.GetColorIfSolid(&outputColor));
 
   SolidColorFill(canvas);
   EXPECT_FALSE(canvas.GetColorIfSolid(&outputColor));
 }
 
+TEST(AnalysisCanvasTest, ClipRRectCoversCanvas) {
+
+  SkVector radii[4] = {
+    SkVector::Make(10.0, 15.0),
+    SkVector::Make(20.0, 25.0),
+    SkVector::Make(30.0, 35.0),
+    SkVector::Make(40.0, 45.0),
+  };
+
+  int rr_size = 600;
+  int canvas_size = 255;
+
+  struct {
+    SkVector offset;
+    bool expected;
+  } cases [] = {
+    // Not within bounding box of |rr|.
+    { SkVector::Make(100.0, 100.0), false },
+
+    // Intersects UL corner.
+    { SkVector::Make(0.0, 0.0), false },
+
+    // Between UL and UR.
+    { SkVector::Make(-50.0, 0), true },
+
+    // Intersects UR corner.
+    { SkVector::Make(canvas_size - rr_size, 0), false },
+
+    // Between UR and LR.
+    { SkVector::Make(canvas_size - rr_size, -50.0), true },
+
+    // Intersects LR corner.
+    { SkVector::Make(canvas_size - rr_size, canvas_size - rr_size), false },
+
+    // Between LL and LR
+    { SkVector::Make(-50, canvas_size - rr_size), true },
+
+    // Intersects LL corner
+    { SkVector::Make(0, canvas_size - rr_size), false },
+
+    // Between UL and LL
+    { SkVector::Make(0, -50), true },
+
+    // In center
+    { SkVector::Make(-100, -100), true},
+  };
+
+  SkColor outputColor;
+
+  for (size_t i = 0; i < arraysize(cases); ++i) {
+    skia::AnalysisCanvas canvas(canvas_size, canvas_size);
+
+    SkRect bounding_rect = SkRect::MakeXYWH(
+        cases[i].offset.x(), cases[i].offset.y(), rr_size, rr_size);
+
+    SkRRect rr;
+    rr.setRectRadii(bounding_rect, radii);
+
+    canvas.clipRRect(rr);
+    EXPECT_EQ(cases[i].expected, canvas.GetColorIfSolid(&outputColor)) << i;
+  }
+}
+
 }  // namespace skia