use some helper Make functions to initialize SkImageInfo

samplecode/SampleFatBits.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleCode.h"
 #include "SkView.h"
 #include "SkCanvas.h"
@@ skipping 88 matching lines @@
 
     void setWHZ(int width, int height, int zoom) {
         fW = width;
         fH = height;
         fZoom = zoom;
         fBounds.set(0, 0, SkIntToScalar(width * zoom), SkIntToScalar(height * zoom));
         fMatrix.setScale(SkIntToScalar(zoom), SkIntToScalar(zoom));
         fInverse.setScale(SK_Scalar1 / zoom, SK_Scalar1 / zoom);
         fShader->setLocalMatrix(fMatrix);
 
-        SkImageInfo info = {
-            width, height, kPMColor_SkColorType, kPremul_SkAlphaType
-        };
+        SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
         fMinSurface.reset(SkSurface::NewRaster(info));
         info.fWidth *= zoom;
         info.fHeight *= zoom;
         fMaxSurface.reset(SkSurface::NewRaster(info));
     }
 
     void drawBG(SkCanvas*);
     void drawFG(SkCanvas*);
     void drawLine(SkCanvas*, SkPoint pts[2]);
     void drawRect(SkCanvas* canvas, SkPoint pts[2]);
@@ skipping 403 matching lines @@
 
 private:
 
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new DrawLineView; }
 static SkViewRegister reg(MyFactory);