SkiaExamples improvements.

experimental/SkiaExamples/BaseExample.h

-/*
- * Copyright 2013 Google Inc.
- *
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- *
- */
-
-#ifndef BaseExample_DEFINED
-#define BaseExample_DEFINED
-
-#include "SkWindow.h"
-
-class GrContext;
-struct GrGLInterface;
-class GrRenderTarget;
-class SkCanvas;
-
-class BaseExample : public SkOSWindow {
-public:
-    enum DeviceType {
-        kRaster_DeviceType,
-        kGPU_DeviceType,
-    };
-    BaseExample(void* hWnd, int argc, char** argv);
-
-    // Changes the device type of the object.
-    bool setupBackend(DeviceType type);
-    void tearDownBackend();
-
-    DeviceType getDeviceType() const { return fType; }
-
-protected:
-    // Your class should override this method to do its thing.
-    virtual void draw(SkCanvas* canvas) SK_OVERRIDE;
-
-    virtual void onSizeChange() SK_OVERRIDE;
-
-#ifdef SK_BUILD_FOR_WIN
-    virtual void onHandleInval(const SkIRect&) SK_OVERRIDE;
-#endif
-
-    SkCanvas* createCanvas() SK_OVERRIDE;
-
-private:
-    void setupRenderTarget();
-
-    DeviceType fType;
-
-    GrContext* fContext;
-    GrRenderTarget* fRenderTarget;
-    AttachmentInfo fAttachmentInfo;
-    const GrGLInterface* fInterface;
-    typedef SkOSWindow INHERITED;
-};
-#endif