Propagate filter mode when rendering Alpha8 bitmaps

src/core/SkDraw.cpp

 /*
  * Copyright 2006 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.
  */
 #define __STDC_LIMIT_MACROS
 
 #include "SkDraw.h"
 #include "SkBlitter.h"
@@ skipping 1222 matching lines @@
             SkCanvas c(device);
             // need the unclipped top/left for the translate
             c.translate(-SkIntToScalar(mask.fBounds.fLeft),
                         -SkIntToScalar(mask.fBounds.fTop));
             c.concat(*fMatrix);
 
             // We can't call drawBitmap, or we'll infinitely recurse. Instead
             // we manually build a shader and draw that into our new mask
             SkPaint tmpPaint;
             tmpPaint.setFlags(paint.getFlags());
+            tmpPaint.setFilterQuality(paint.getFilterQuality());
             SkAutoBitmapShaderInstall install(bitmap, tmpPaint);
             SkRect rr;
             rr.set(0, 0, SkIntToScalar(bitmap.width()),
                    SkIntToScalar(bitmap.height()));
             c.drawRect(rr, install.paintWithShader());
         }
         this->drawDevMask(mask, paint);
     }
 }
 
@@ skipping 826 matching lines @@
         mask->fImage = SkMask::AllocImage(size);
         memset(mask->fImage, 0, mask->computeImageSize());
     }
 
     if (SkMask::kJustComputeBounds_CreateMode != mode) {
         draw_into_mask(*mask, devPath, style);
     }
 
     return true;
 }