examples/Graphics/coverflow/inc/openvgengine.h

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// openvgengine.h
//
// Copyright (c) 2005-2008 Symbian Ltd.  All rights reserved.
//
#ifndef __OPENVGENGINE_H__
#define __OPENVGENGINE_H__

#include <VG/openvg.h>
#include <EGL/egl.h>
#include "engine.h"
// image Height/Width
const TInt KImageSize = 128;

// KMaxDisplayCoversExample3 refers to the number of album covers
// visible on the screen at any given point
const TInt KMaxDisplayCoversExample3 = 40;
const TInt KMaxDisplayLeftExample3 = -3;
const TInt KMaxDisplayRightExample3 = 3;


// the max number of covers you can store
const TInt KMaxCoversExample3 = 40;

class  COpenVGEngine :  public CBase, public MEngine
        {
public:

        static COpenVGEngine* NewL(TSize aSize,EGLDisplay& aDisplay, EGLSurface& aSurface, EGLContext& aContext);
        virtual ~COpenVGEngine();
        TInt GetSpeed();
        //From MEngine
        void ActivateL();
        void Deactivate();
        void Step();
        TBool IsPending();
        TKeyResponse HandleKeyEventL(const TKeyEvent& aKeyEvent);


private:
        COpenVGEngine(TSize aSize,EGLDisplay& aDisplay, EGLSurface& aSurface, EGLContext& aContext);

        void DrawCover(TInt i);

        void NextCover();
        void PreviousCover();

        void ToggleCoverReflection();
        VGfloat GetMiddleCoverScalingFactor(VGfloat coverPosition);


private:
        EGLDisplay& iDisplay;
        EGLSurface& iSurface;
        EGLContext& iContext;
        VGImage iImage;
        VGfloat iCoverLocation[KMaxCoversExample3];
        VGint iWantedCover;
    TBool iHasPendingDraw;
        VGfloat iSpeedOffset;
        TBool iShowMirror;
        TSize iSurfaceSize;
        VGfloat iSpeed;
        RArray<VGImage> iImages;
        TInt iCurrentImageIndex;
        VGPaint iShadowPaint;
        };


#endif

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