Fix for displacement mapping

gm/displacement.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 "gm.h"
 #include "SkDisplacementMapEffect.h"
 #include "SkBitmapSource.h"
@@ skipping 68 matching lines @@
         }
         canvas->clear(0x00000000);
         SkPaint paint;
         SkAutoTUnref<SkImageFilter> displ(SkNEW_ARGS(SkBitmapSource, (fCheckerboard)));
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kR_ChannelSelectorType,
              SkDisplacementMapEffect::kG_ChannelSelectorType, 0.0f, displ)))->unref();
         drawClippedBitmap(canvas, 0, 0, paint);
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kB_ChannelSelectorType,
-             SkDisplacementMapEffect::kA_ChannelSelectorType, 0.2f, displ)))->unref();
+             SkDisplacementMapEffect::kA_ChannelSelectorType, 16.0f, displ)))->unref();
         drawClippedBitmap(canvas, 100, 0, paint);
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kR_ChannelSelectorType,
-             SkDisplacementMapEffect::kB_ChannelSelectorType, 0.4f, displ)))->unref();
+             SkDisplacementMapEffect::kB_ChannelSelectorType, 32.0f, displ)))->unref();
         drawClippedBitmap(canvas, 200, 0, paint);
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kG_ChannelSelectorType,
-             SkDisplacementMapEffect::kA_ChannelSelectorType, 0.6f, displ)))->unref();
+             SkDisplacementMapEffect::kA_ChannelSelectorType, 48.0f, displ)))->unref();
         drawClippedBitmap(canvas, 300, 0, paint);
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kR_ChannelSelectorType,
-             SkDisplacementMapEffect::kA_ChannelSelectorType, 0.8f, displ)))->unref();
+             SkDisplacementMapEffect::kA_ChannelSelectorType, 64.0f, displ)))->unref();
         drawClippedBitmap(canvas, 400, 0, paint);
 
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kR_ChannelSelectorType,
-             SkDisplacementMapEffect::kG_ChannelSelectorType, 0.5f, displ)))->unref();
+             SkDisplacementMapEffect::kG_ChannelSelectorType, 40.0f, displ)))->unref();
         drawClippedBitmap(canvas, 0, 100, paint);
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kB_ChannelSelectorType,
-             SkDisplacementMapEffect::kA_ChannelSelectorType, 0.5f, displ)))->unref();
+             SkDisplacementMapEffect::kA_ChannelSelectorType, 40.0f, displ)))->unref();
         drawClippedBitmap(canvas, 100, 100, paint);
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kR_ChannelSelectorType,
-             SkDisplacementMapEffect::kB_ChannelSelectorType, 0.5f, displ)))->unref();
+             SkDisplacementMapEffect::kB_ChannelSelectorType, 40.0f, displ)))->unref();
         drawClippedBitmap(canvas, 200, 100, paint);
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kG_ChannelSelectorType,
-             SkDisplacementMapEffect::kA_ChannelSelectorType, 0.5f, displ)))->unref();
+             SkDisplacementMapEffect::kA_ChannelSelectorType, 40.0f, displ)))->unref();
         drawClippedBitmap(canvas, 300, 100, paint);
         paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect,
             (SkDisplacementMapEffect::kR_ChannelSelectorType,
-             SkDisplacementMapEffect::kA_ChannelSelectorType, 0.5f, displ)))->unref();
+             SkDisplacementMapEffect::kA_ChannelSelectorType, 40.0f, displ)))->unref();
         drawClippedBitmap(canvas, 400, 100, paint);
     }
 
 private:
     typedef GM INHERITED;
     SkBitmap fBitmap, fCheckerboard;
     bool fInitialized;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new DisplacementMapGM; }
 static GMRegistry reg(MyFactory);
 
 }