Fix filter primitive bounds computations.

src/effects/SkTileImageFilter.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTileImageFilter.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 63 matching lines @@
                                   &shaderMatrix));
     paint.setShader(shader);
     canvas.translate(-dstRect.fLeft, -dstRect.fTop);
     canvas.drawRect(dstRect, paint);
     *dst = device->accessBitmap(false);
     offset->fX = dstIRect.fLeft;
     offset->fY = dstIRect.fTop;
     return true;
 }
 
+void SkTileImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
+                                          SkIRect* dst, MapDirection direction) const {
+    SkRect rect = kReverse_MapDirection == direction ? fSrcRect : fDstRect;
+    ctm.mapRect(&rect);
+    rect.roundOut(dst);
+#ifdef SK_SUPPORT_SRC_BOUNDS_BLOAT_FOR_IMAGEFILTERS
+    dst->join(src);
+#endif
+}
+
 bool SkTileImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
                                        SkIRect* dst) const {
-    SkRect srcRect;
-    ctm.mapRect(&srcRect, fSrcRect);
-    SkIRect srcIRect;
-    srcRect.roundOut(&srcIRect);
-    srcIRect.join(src);
-    *dst = srcIRect;
+    this->onFilterNodeBounds(src, ctm, dst, kReverse_MapDirection);
     return true;
 }
 
 void SkTileImageFilter::computeFastBounds(const SkRect& src, SkRect* dst) const {
+#ifdef SK_SUPPORT_SRC_BOUNDS_BLOAT_FOR_IMAGEFILTERS
     // This is a workaround for skia:3194.
     *dst = src;
     dst->join(fDstRect);
+#else
+    *dst = fDstRect;
+#endif
 }
 
 SkFlattenable* SkTileImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
     SkRect src, dst;
     buffer.readRect(&src);
     buffer.readRect(&dst);
     return Create(src, dst, common.getInput(0));
 }
 
@@ skipping 11 matching lines @@
     str->appendf(" dst: %.2f %.2f %.2f %.2f",
                  fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom);
     if (this->getInput(0)) {
         str->appendf("input: (");
         this->getInput(0)->toString(str);
         str->appendf(")");
     }
     str->append(")");
 }
 #endif