Do not skip fractional y for SkAAClip

src/core/SkScan_AAAPath.cpp

 /*
  * Copyright 2016 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkAntiRun.h"
 #include "SkBlitter.h"
 #include "SkEdge.h"
@@ skipping 934 matching lines @@
 
         leftE->goY(y);
         riteE->goY(y);
 
         if (leftE->fX > riteE->fX || (leftE->fX == riteE->fX &&
                                       leftE->fDX > riteE->fDX)) {
             SkTSwap(leftE, riteE);
         }
 
         SkFixed local_bot_fixed = SkMin32(leftE->fLowerY, riteE->fLowerY);
-        // Skip the fractional y if edges are changing smoothly
-        if (isSmoothEnough(leftE, riteE, currE, stop_y)) {
+        // Skip the fractional y if edges are changing smoothly.
+        // If forceRLE is true, we won't skip the fractional y because it
+        // implies that SkAAClip is calling us and there are strict
+        // assertions inside SkAAClip.
+        if (isSmoothEnough(leftE, riteE, currE, stop_y) && !forceRLE) {
             local_bot_fixed = SkFixedCeilToFixed(local_bot_fixed);
         }
         local_bot_fixed = SkMin32(local_bot_fixed, SkIntToFixed(stop_y + 1));
 
         SkFixed left = leftE->fX;
         SkFixed dLeft = leftE->fDX;
         SkFixed rite = riteE->fX;
         SkFixed dRite = riteE->fDX;
         if (0 == (dLeft | dRite)) {
             int     fullLeft    = SkFixedCeilToInt(left);
@@ skipping 341 matching lines @@
         AAAFillPath(path, clip.bwRgn(), blitter);
     } else {
         SkRegion        tmp;
         SkAAClipBlitter aaBlitter;
 
         tmp.setRect(clip.getBounds());
         aaBlitter.init(blitter, &clip.aaRgn());
         AAAFillPath(path, tmp, &aaBlitter, true);
     }
 }