/*
* Copyright (c) 2005-2006 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: 
*
*/


#ifndef __BUMPMAPPINGH__
#define __BUMPMAPPINGH__

//  INCLUDES

#include <e32base.h> // for CBase definition
#include <GLES\gl.h>      // OpenGL ES header file
#include "Textureutils.h"
#include "Glutils.h"      // gluLookAt() function
#include "firefly.h"

// FORWARD DECLARATIONS

/**
 * Class that does the actual OpenGL ES rendering.
 * Subclass of CFiniteStateMachine because the application
 * needs to handle loading textures and running states.
 */
class CBumpMap
	: public CFiniteStateMachine, public MTextureLoadingListener
	{
	public: // Constructors and destructor

        /**
         * Factory method for creating a new CBumpMap object.
		 * Calls the hidden constructors.
         */
		static CBumpMap* NewL( GLuint aWidth, GLuint aHeight );

        /**
         * Destructor. Does nothing.
         */
		virtual ~CBumpMap();

	protected: // Hidden constructors

        /**
         * Standard constructor that must never Leave.
         * Stores the given screen width and height.
         * @param aWidth Width of the screen.
         * @param aHeight Height of the screen.
         */
		CBumpMap( GLuint aWidth, GLuint aHeight );

        /**
         * Second phase constructor that can call methods that may leave. Does nothing.
         */
		void ConstructL( void );


	public: // New methods

        /**
         * Initializes OpenGL ES, sets the vertex and color
         * arrays and pointers. Also selects the shading mode and
         * creates the CTextureManager instance and starts loading
         * of required textures.
         */
		void AppInitL( void );

        /**
         * Called upon application exit. Destroys the CTextureManager
         * instance that was created in AppInitL() method.
         */
		void AppExit( void );

        /**
         * Renders one frame.
         * @param aFrame Number of the frame to be rendered.
		 * @param aTimeSecs Seconds elapsed since the application started running.
		 * @param aDeltaTimeSecs Seconds elapsed since last call to AppCycle().
         */
		void AppCycle( GLuint aFrame, GLfloat aTimeSecs, GLfloat aDeltaTimeSecs );

    	/**
    	 * Called when the finite state machine enters a new state.
    	 * Does nothing in this implementation.
    	 * @param aState State that is about to be entered.
    	 */
		void OnEnterStateL( TInt aState);

    	/**
    	 * Called when texture manager starts loading the textures.
    	 * Sets the current state to "loading textures".
    	 */
		void OnStartLoadingTexturesL();

    	/**
    	 * Called when texture manager has completed texture loading.
    	 * Changes the current state to "running".
    	 */
		void OnEndLoadingTexturesL();

        /**
         * Notifies that the screen size has dynamically changed during execution of
         * this program. Resets the viewport to this new size and sets this size
         * to the CTextureManager.
         * @param aWidth New width of the screen.
         * @param aHeight New height of the screen.
         */
        void SetScreenSize( GLuint aWidth, GLuint aHeight );

    private: // New methods

  		/**
  		 * Draws the bumpmapped rectangle.
  		 */
		void DrawBumpmappedRect();

        /**
         * Generates the vertices for drawing the bumpmapped rectangle to the screen.
         */
        void GenerateBumpmapVerticesL();


	public: // Data

    	/**
    	 * Application states:
    	 * ELoadingTextures - indicates that the app. is loading textures.
    	 * ERunning - indicates that the app. is running.
    	 */
		enum
		{
		ELoadingTextures,
		ERunning
		};

	private: // Data

    	/** Texture manager that is used to load the used textures. */
		CTextureManager * iTextureManager;

		/** Firefly that also acts as the light source. */
        CFireFly* iLightSource;
        /** Width of the screen */
        GLuint iScreenWidth;
        /** Height of the screen */
        GLuint iScreenHeight;
        /** Bumpmapping texture. */
        TTexture iBumpmapTexture;
        /** Normal color texture. */
        TTexture iTexture;

        /** Vertices for the bumpmap rectangle. */
        GLfloat* iBumpmapVertices;
        /** Color values for the vertices in the bumpmap rectangle. */
        GLfloat* iBumpmapColors;
        /** Texture coordinates for the bumpmap rectangle. */
        GLfloat* iBumpmapTexCoords;
        /** Indices for drawing the bumpmap rectangle. */
        GLubyte* iBumpmapIndices;

		/** Camera. */
		TCamera iCamera;
	};

#endif

// End of File

