Force tiles in SampleApp to integer boundaries.

samplecode/SampleApp.h

 /*
  * Copyright 2011 Skia
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SampleApp_DEFINED
 #define SampleApp_DEFINED
 
@@ skipping 111 matching lines @@
     void toggleRendering();
     void toggleSlideshow();
     void toggleFPS();
     void showOverview();
     void toggleDistanceFieldFonts();
 
     GrContext* getGrContext() const { return fDevManager->getGrContext(); }
 
     void setZoomCenter(float x, float y);
     void changeZoomLevel(float delta);
+    void changeOffset(SkVector delta);
     bool nextSample();
     bool previousSample();
     bool goToSample(int i);
     SkString getSampleTitle(int i);
     int  sampleCount();
     bool handleTouch(int ownerId, float x, float y,
             SkView::Click::State state);
     void saveToPdf();
     void postInvalDelay();
 
@@ skipping 23 matching lines @@
 
     int fCurrIndex;
 
     SkPictureRecorder fRecorder;
     SkAutoTDelete<SkCanvas> fFlagsFilterCanvas;
     SkPath fClipPath;
 
     SkTouchGesture fGesture;
     SkScalar fZoomLevel;
     SkScalar fZoomScale;
+    SkVector fOffset;
 
     DeviceType fDeviceType;
     DeviceManager* fDevManager;
 
     bool fSaveToPdf;
     bool fSaveToSKP;
     SkAutoTUnref<SkDocument> fPDFDocument;
 
     bool fUseClip;
     bool fUsePicture;
@@ skipping 17 matching lines @@
 
     SkOSMenu::TriState fLCDState;
     SkOSMenu::TriState fAAState;
     SkOSMenu::TriState fSubpixelState;
     int fHintingState;
     int fFilterQualityIndex;
     unsigned   fFlipAxis;
 
     int fMSAASampleCount;
 
-    int fScrollTestX, fScrollTestY;
     SkScalar fZoomCenterX, fZoomCenterY;
 
     //Stores global settings
     SkOSMenu* fAppMenu; // We pass ownership to SkWindow, when we call addMenu
     //Stores slide specific settings
     SkOSMenu* fSlideMenu; // We pass ownership to SkWindow, when we call addMenu
 
     void loadView(SkView*);
     void updateTitle();
     bool getRawTitle(SkString*);
 
     bool zoomIn();
     bool zoomOut();
     void updatePointer(int x, int y);
     void magnify(SkCanvas* canvas);
     void showZoomer(SkCanvas* canvas);
     void updateMatrix();
     void postAnimatingEvent();
     int findByTitle(const char*);
     void listTitles();
     SkSize tileSize() const;
     bool sendAnimatePulse();
 
     typedef SkOSWindow INHERITED;
 };
 
 #endif