Fix filter primitive bounds computations.

src/core/SkDevice.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 "SkColorFilter.h"
 #include "SkDevice.h"
 #include "SkDraw.h"
@@ skipping 393 matching lines @@
 
 void SkBaseDevice::drawBitmapAsSprite(const SkDraw& draw, const SkBitmap& bitmap, int x, int y,
                                       const SkPaint& paint) {
     SkImageFilter* filter = paint.getImageFilter();
     if (filter && !this->canHandleImageFilter(filter)) {
         SkImageFilter::DeviceProxy proxy(this);
         SkBitmap dst;
         SkIPoint offset = SkIPoint::Make(0, 0);
         SkMatrix matrix = *draw.fMatrix;
         matrix.postTranslate(SkIntToScalar(-x), SkIntToScalar(-y));
-        const SkIRect clipBounds = bitmap.bounds();
+        SkIRect clipBounds = draw.fClip->getBounds();
+        clipBounds.offset(-x, -y);
         SkAutoTUnref<SkImageFilter::Cache> cache(this->getImageFilterCache());
         SkImageFilter::Context ctx(matrix, clipBounds, cache.get(),
                                    SkImageFilter::kApprox_SizeConstraint);
         if (filter->filterImage(&proxy, bitmap, ctx, &dst, &offset)) {
             SkPaint tmpUnfiltered(paint);
             tmpUnfiltered.setImageFilter(nullptr);
             this->drawSprite(draw, dst, x + offset.x(), y + offset.y(), tmpUnfiltered);
         }
     } else {
         this->drawSprite(draw, bitmap, x, y, paint);
@@ skipping 10 matching lines @@
     if (kUnknown_SkPixelGeometry == fSurfaceProps.pixelGeometry()
         || this->onShouldDisableLCD(paint)) {
 
         flags &= ~SkPaint::kLCDRenderText_Flag;
         flags |= SkPaint::kGenA8FromLCD_Flag;
     }
 
     return flags;
 }