add tests for large cordinates bounds when building aaclip

tests/AAClipTest.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 "SkAAClip.h"
 #include "SkCanvas.h"
 #include "SkMask.h"
@@ skipping 403 matching lines @@
         SkAAClip clip;
         SkRect r;
         r.fLeft = 129.892181f;
         r.fTop = 10.3999996f;
         r.fRight = 130.892181f;
         r.fBottom = 20.3999996f;
         clip.setRect(r, true);
     }
 }
 
+// Building aaclip meant aa-scan-convert a path into a huge clip.
+// the old algorithm sized the supersampler to the size of the clip, which overflowed
+// its internal 16bit coordinates. The fix was to intersect the clip+path_bounds before
+// sizing the supersampler.
+//
+// Before the fix, the following code would assert in debug builds.
+//
+static void test_crbug_422693(skiatest::Reporter* reporter) {
+#if 0
+    SkRasterClip rc(SkIRect::MakeLTRB(-25000, -25000, 25000, 25000));
+    SkPath path;
+    path.addCircle(50, 50, 50);
+    rc.op(path, rc.getBounds().size(), SkRegion::kIntersect_Op, true);
+#endif
+}
+
 DEF_TEST(AAClip, reporter) {
     test_empty(reporter);
     test_path_bounds(reporter);
     test_irect(reporter);
     test_rgn(reporter);
     test_path_with_hole(reporter);
     test_regressions();
     test_nearly_integral(reporter);
     test_really_a_rect(reporter);
+    test_crbug_422693(reporter);
 }