More general version of image filtering; reworked to be robust and easier to SSE

gm/filterbitmap.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 "gm.h"
 #include "SkGradientShader.h"
 
@@ skipping 17 matching lines @@
     SkPaint paint;
 
     SkAutoCanvasRestore acr(canvas, true);
 
     canvas->drawBitmapMatrix(bm, mat, &paint);
 
     paint.setFilterBitmap(true);
     canvas->translate(dx, 0);
     canvas->drawBitmapMatrix(bm, mat, &paint);
 
-    paint.setFlags(paint.getFlags() | SkPaint::kBicubicFilterBitmap_Flag);
+    paint.setFlags(paint.getFlags() | SkPaint::kHighQualityFilterBitmap_Flag);
     canvas->translate(dx, 0);
     canvas->drawBitmapMatrix(bm, mat, &paint);
 }
 
 class FilterBitmapGM : public skiagm::GM {
     void onOnceBeforeDraw() {
 
         make_bitmap();
 
         SkScalar cx = SkScalarHalf(fBM.width());
@@ skipping 181 matching lines @@
 DEF_GM( return new FilterBitmapCheckerboardGM(32,32); )
 DEF_GM( return new FilterBitmapCheckerboardGM(32,8); )
 DEF_GM( return new FilterBitmapCheckerboardGM(32,2); )
 DEF_GM( return new FilterBitmapCheckerboardGM(192,192); )
 DEF_GM( return new FilterBitmapImageGM("mandrill_16.png"); )
 DEF_GM( return new FilterBitmapImageGM("mandrill_32.png"); )
 DEF_GM( return new FilterBitmapImageGM("mandrill_64.png"); )
 DEF_GM( return new FilterBitmapImageGM("mandrill_128.png"); )
 DEF_GM( return new FilterBitmapImageGM("mandrill_256.png"); )
 DEF_GM( return new FilterBitmapImageGM("mandrill_512.png"); )