Tighten SkAAClip Bounds by Path Bounds

tests/PathTest.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <cmath>
 #include "SkCanvas.h"
 #include "SkGeometry.h"
@@ skipping 152 matching lines @@
     SkPaint paint;
     paint.setAntiAlias(true);
     SkPath path;
     path.moveTo(0, 0);
     path.conicTo(SkBits2Float(0x00003939), SkBits2Float(0x42487fff),  // 2.05276e-41f, 50.125f
             SkBits2Float(0x48082361), SkBits2Float(0x4408e8e9),  // 139406, 547.639f
             SkBits2Float(0x4d1ade0f));  // 1.6239e+08f
     canvas->drawPath(path, paint);
 }
 
+static void test_fuzz_crbug_662780() {
+    auto surface(SkSurface::MakeRasterN32Premul(250, 250));
+    SkCanvas* canvas = surface->getCanvas();
+    SkPaint paint;
+    paint.setAntiAlias(true);
+    SkPath path;
+    path.moveTo(SkBits2Float(0x41000000), SkBits2Float(0x431e0000));  // 8, 158
+    path.lineTo(SkBits2Float(0x41000000), SkBits2Float(0x42f00000));  // 8, 120
+    // 8, 8, 8.00002f, 8, 0.707107f
+    path.conicTo(SkBits2Float(0x41000000), SkBits2Float(0x41000000),
+            SkBits2Float(0x41000010), SkBits2Float(0x41000000), SkBits2Float(0x3f3504f3));
+    path.lineTo(SkBits2Float(0x439a0000), SkBits2Float(0x41000000));  // 308, 8
+    // 308, 8, 308, 8, 0.707107f
+    path.conicTo(SkBits2Float(0x439a0000), SkBits2Float(0x41000000),
+            SkBits2Float(0x439a0000), SkBits2Float(0x41000000), SkBits2Float(0x3f3504f3));
+    path.lineTo(SkBits2Float(0x439a0000), SkBits2Float(0x431e0000));  // 308, 158
+    // 308, 158, 308, 158, 0.707107f
+    path.conicTo(SkBits2Float(0x439a0000), SkBits2Float(0x431e0000),
+            SkBits2Float(0x439a0000), SkBits2Float(0x431e0000), SkBits2Float(0x3f3504f3));
+    path.lineTo(SkBits2Float(0x41000000), SkBits2Float(0x431e0000));  // 8, 158
+    // 8, 158, 8, 158, 0.707107f
+    path.conicTo(SkBits2Float(0x41000000), SkBits2Float(0x431e0000),
+            SkBits2Float(0x41000000), SkBits2Float(0x431e0000), SkBits2Float(0x3f3504f3));
+    path.close();
+    canvas->clipPath(path, true);
+    canvas->drawRectCoords(0, 0, 250, 250, paint);
+}
+
 /**
  * In debug mode, this path was causing an assertion to fail in
  * SkPathStroker::preJoinTo() and, in Release, the use of an unitialized value.
  */
 static void make_path_crbugskia2820(SkPath* path, skiatest::Reporter* reporter) {
     SkPoint orig, p1, p2, p3;
     orig = SkPoint::Make(1.f, 1.f);
     p1 = SkPoint::Make(1.f - SK_ScalarNearlyZero, 1.f);
     p2 = SkPoint::Make(1.f, 1.f + SK_ScalarNearlyZero);
     p3 = SkPoint::Make(2.f, 2.f);
@@ skipping 4125 matching lines @@
 }
 
 DEF_TEST(Paths, reporter) {
     test_fuzz_crbug_647922();
     test_fuzz_crbug_643933();
     test_sect_with_horizontal_needs_pinning();
     test_crbug_629455(reporter);
     test_fuzz_crbug_627414(reporter);
     test_path_crbug364224();
     test_fuzz_crbug_662952(reporter);
+    test_fuzz_crbug_662780();
 
     SkTSize<SkScalar>::Make(3,4);
 
     SkPath  p, empty;
     SkRect  bounds, bounds2;
     test_empty(reporter, p);
 
     REPORTER_ASSERT(reporter, p.getBounds().isEmpty());
 
     // this triggers a code path in SkPath::operator= which is otherwise unexercised
@@ skipping 135 matching lines @@
     PathRefTest_Private::TestPathRef(reporter);
     PathTest_Private::TestPathrefListeners(reporter);
     test_dump(reporter);
     test_path_crbug389050(reporter);
     test_path_crbugskia2820(reporter);
     test_skbug_3469(reporter);
     test_skbug_3239(reporter);
     test_bounds_crbug_513799(reporter);
     test_fuzz_crbug_638223();
 }