NEON fast path for box blur

gm/imageblur.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 "SkBlurImageFilter.h"
 #include "SkRandom.h"
 
 #define WIDTH 500
 #define HEIGHT 500
 
 namespace skiagm {
 
 class ImageBlurGM : public GM {
 public:
-    ImageBlurGM() {
+    ImageBlurGM(SkScalar sigmaX, SkScalar sigmaY)
+        : fSigmaX(sigmaX), fSigmaY(sigmaY) {
         this->setBGColor(0xFF000000);
     }
 
 protected:
     virtual SkString onShortName() {
-        return SkString("imageblur");
+        SkString name;
+        name.printf("imageblur_%.2f_%.2f",
+            SkScalarToFloat(fSigmaX), SkScalarToFloat(fSigmaY));
+        return name;
     }
 
     virtual SkISize onISize() {
         return make_isize(WIDTH, HEIGHT);
     }
 
     virtual void onDraw(SkCanvas* canvas) {
         SkPaint paint;
-        paint.setImageFilter(new SkBlurImageFilter(24.0f, 0.0f))->unref();
+        paint.setImageFilter(new SkBlurImageFilter(fSigmaX, fSigmaY))->unref();
         canvas->saveLayer(NULL, &paint);
         const char* str = "The quick brown fox jumped over the lazy dog.";
 
         SkRandom rand;
         SkPaint textPaint;
         textPaint.setAntiAlias(true);
         for (int i = 0; i < 25; ++i) {
             int x = rand.nextULessThan(WIDTH);
             int y = rand.nextULessThan(HEIGHT);
             textPaint.setColor(rand.nextBits(24) | 0xFF000000);
             textPaint.setTextSize(rand.nextRangeScalar(0, 300));
             canvas->drawText(str, strlen(str), SkIntToScalar(x),
                              SkIntToScalar(y), textPaint);
         }
         canvas->restore();
     }
 
 private:
+    SkScalar fSigmaX;
+    SkScalar fSigmaY;
+
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
-static GM* MyFactory(void*) { return new ImageBlurGM; }
-static GMRegistry reg(MyFactory);
+static GM* MyFactory1(void*) { return new ImageBlurGM(24.0f, 0.0f); }
+static GMRegistry reg1(MyFactory1);
+
+static GM* MyFactory2(void*) { return new ImageBlurGM(80.0f, 80.0f); }
+static GMRegistry reg2(MyFactory2);
 
 }