gls_rso_loader.h

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/*! \file gls_rso_loader.h
\brief  The main class for loading an RSO.

\par Copyright Information

    Copyright (c) 2013 The DiSTI Corporation.<br>
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    USA<br>
    <br>
    All rights reserved.<br>

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*/

#ifndef GLS_RSO_LOADER_H_INCLUDED
#define GLS_RSO_LOADER_H_INCLUDED

#include "rso_interface_2.h"

#include <vector>
#include <string>

namespace GlsRSOLoader 
{
    class LiveComponentLibRef;

    /** RSOReference class. Main interface for GlsRSOLoader */
    class RSOReference
    {
        disti::RSOInterface1* _rso;
        unsigned int          _rsoVersion;
        LiveComponentLibRef*  _liveComponentLibRef;

        RSOReference(const RSOReference&);
        RSOReference& operator=(const RSOReference&);

    public:
        /** Constructor */
        RSOReference(disti::RSOInterface1*, LiveComponentLibRef*, unsigned int);

        /** Destructor */
        ~RSOReference();

        /** Accessor for RSOInterface contained within this RSO Reference
        * \return Pointer to RSOInterface instance
        */
        inline disti::RSOInterface1* GetRSOInterface1() { return _rso; }

        /** Gets the version number for the RSO
        *  \return The RSO version number
        */
        inline unsigned int GetRSOVersion() { return _rsoVersion; }

        /** Sets a resource contained within the RSO
        * \param resourceName  Resource name
        * \param resourceVal  Resource value
        */
        inline void SetResource(const char* resourceName, const char* resourceVal) { _rso->SetResource(resourceName, resourceVal); }

        /** CRT Insensitive version of SetResources()
        * Parse a buffer of resource value pairs.
        * \param buf String containing resource data
        */
        void SetResources(const char* buf);

        /** Gets a resource value by name
        * \param resourceName Resource name
        * \return Value of given resource
        */
        inline const char* GetResource(const char* resourceName) { return _rso->GetResource(resourceName); }

        /** Calculate method. Should be called every frame for normal operation.
        * \param time  Elapsed time, in seconds
        */
        inline void Calculate(double time) { _rso->Calculate(time); }

        /** Calculate transformations and perform culling. Call this before Draw()
        * \param current  Transformation matrices (Projection and Modelview) to apply
        * \param culler  Culler operation to apply on this RSO
        */
        inline void PreDraw(const disti::RSOInterface1::OpenGLMatrices& current, disti::RSOInterface1::Culler& culler) { _rso->PreDraw(current, culler); }

        /** Draw the object via OpenGL. Call this after PreDraw() */
        inline void Draw() { _rso->Draw(); }

        /** Allow the object to handle an event.
        * \param ev Event to be handled by the RSO
        * \return true if the event was handled by the RSO
        */
        inline bool HandleInput(disti::RSOInterface1::Event *ev) { return _rso->HandleInput(ev); }

        /** Allow for handling events from inside the object.
        *  The emitted event handler will be passed events that are from inside the component
        * \param handler pointer to the EmittedEventHandler object to use or NULL to remove the current event handler.
        * \return true if this component may emit events, false if this component will never emit events.
        */
        inline bool SetEmittedEventHandler(disti::RSOInterface1::EmittedEventHandler* handler) { return _rso->SetEmittedEventHandler(handler); }

        /** Sets the "AbsolutePlacement" property on the RSO
        * \param value true to enable AbsolutePlacement property, false to disable it
        */
        void AbsolutePlacement(bool value);

        /** Gets the background color of the RSO's display frame
        * \param r Red color component (0-255)
        * \param g Green color component (0-255)
        * \param b Blue color component (0-255)
        * \param a Alpha color component (0-255)
        */
        void GetBackgroundColor(unsigned char &r, unsigned char &g, unsigned char &b, unsigned char &a);

        /** Get the extents of the RSO when drawn with the given transformation matrix, as a coordinate system-aligned box
        * \param min If the method returns true, contains the point corresponding with the 1st corner of the box.  If the method returns false, value is undefined.
        * \param max If the method returns true, contains the point corresponding with the 2nd corner of the box.  If the method returns false, value is undefined.
        * \param transform Transformation matrix from A to B where A is the component’s coordinate system and B is the coordinate system to compute the bounding box in. (If NULL then identity matrix is assumed)
        * \return true if the extents were calculated, false if the extents could not be calculated.
        */
        bool GetBoundingBox(disti::RSOInterface1::Vector *min, disti::RSOInterface1::Vector *max, disti::RSOInterface1::MatrixD *transform = 0);

        /** Sets the projection of the RSO using glOrtho or gluSetPerspective. Sets the application's projection globally.
        * \param controlWidth Width of the RSO (in pixels)
        * \param controlHeight Height of the RSO (in pixels)
        * \param depthFactor
        */
        void SetProjection(int controlWidth, int controlHeight, float depthFactor = 4.0f, float fov = 90.0f, bool perspective = false);

        /** Mouse button down event handler
        * \param x X screen coordinate of mouse cursor's current location
        * \param y Y screen coordinate of mouse cursor's current location
        * \param button Mouse button pressed (see RSOInterface1::MouseEvent::MouseButtonType)
        * \return true if event handled successfully, false otherwise
        */
        bool HandleMouseDown(int x, int y, int button);

        /** Mouse button up event handler
        * \param x X screen coordinate of mouse cursor's current location
        * \param y Y screen coordinate of mouse cursor's current location
        * \param button Mouse button released (see RSOInterface1::MouseEvent::MouseButtonType)
        */
        bool HandleMouseUp(int x, int y, int button);

        /** Mouse wheel plus event handler
        * \param x X screen coordinate of mouse cursor's current location
        * \param y Y screen coordinate of mouse cursor's current location
        * \param buttonMask bitfield of which mouse buttons are currently held down (see RSOInterface1::MouseEvent::MouseButtonType)
        * \return true if event handled successfully, false otherwise
        */
        bool HandleMouseWheelPlus(int x, int y, int buttonMask);

        /** Mouse wheel minus event handler
        * \param x X screen coordinate of mouse cursor's current location
        * \param y Y screen coordinate of mouse cursor's current location
        * \param buttonMask bitfield of which mouse buttons are currently held down (see RSOInterface1::MouseEvent::MouseButtonType)
        * \return true if event handled successfully, false otherwise
        */
        bool HandleMouseWheelMinus(int x, int y, int buttonMask);

        /** Mouse button up event handler
        * \param x X screen coordinate of mouse cursor's current location
        * \param y Y screen coordinate of mouse cursor's current location
        * \param buttonMask bitfield of which mouse buttons are currently held down (see RSOInterface1::MouseEvent::MouseButtonType)
        * \return true if event handled successfully, false otherwise
        */
        bool HandleMouseMove(int x, int y, int buttonMask);

        /** Keyboard key down event handler
        * \param key Key code pressed. Either ascii value or RSOInterface1::KeyboardEvent::KeySymCodeEnum (for any non-ascii key).
        * \param x X screen coordinate of mouse cursor's current location
        * \param y Y screen coordinate of mouse cursor's current location
        * \return true if event handled successfully, false otherwise
        */
        bool HandleKeyDown(int key, int x, int y);

        /** Keyboard key up event handler
        * \param key Key code released. Either ascii value or RSOInterface1::KeyboardEvent::KeySymCodeEnum (for any non-ascii key).
        * \param x X screen coordinate of mouse cursor's current location
        * \param y Y screen coordinate of mouse cursor's current location
        * \return true if event handled successfully, false otherwise
        */
        bool HandleKeyUp(int key, int x, int y);

        // Additions for RSO version 2

        /** Constructs a resource handle for rapid access to the named resource (RSO v2)
        *  \param resourceName         resource name
        *  \param[out] resourceHandle  reference to resource handle output location
        *  \return                     true if successful
        */
        bool CreateResourceHandle(const char *resourceName, disti::RSOInterface2::ResourceHandle &resourceHandle);

        /** Frees the given resource handle (RSO v2)
        *  \param resourceHandle  resource handle
        *  \return                true if successful
        */
        bool ReleaseResourceHandle(disti::RSOInterface2::ResourceHandle resourceHandle);

        /** Checks the given resource handle for validity (RSO v2)
        *  \param resourceHandle  resource handle
        *  \return                true if the given resource handle is connected to a valid resource
        */
        bool IsResourceHandleValid(disti::RSOInterface2::ResourceHandle resourceHandle);

        /** Sets a string resource by handle (RSO v2)
        *  \param resourceHandle  resource handle
        *  \param resourceVal     resource value
        *  \return                true if successful
        */
        bool SetResource(disti::RSOInterface2::ResourceHandle resourceHandle, const char *resourceVal);

        /** Gets a string resource by handle (RSO v2)
        *  \param resourceHandle      resource handle
        *  \param[out] resourceValue  reference to resource value output location
        *  \return                    true if successful
        */
        bool GetResource(disti::RSOInterface2::ResourceHandle resourceHandle, const char *&resourceValue);

        /** Sets an integer resource by name (RSO v2)
        *  \param resourceName  resource name
        *  \param resourceVal   resource value
        *  \return              true if successful
        */
        bool SetIntResource(const char *resourceName, long resourceVal);
        /** Sets an integer resource by handle (RSO v2)
        *  \param resourceHandle  resource handle
        *  \param resourceVal     resource value
        *  \return                true if successful
        */
        bool SetIntResource(disti::RSOInterface2::ResourceHandle resourceHandle, long resourceVal);

        /** Gets an integer resource by name (RSO v2)
        *  \param resourceName      resource name
        *  \param[out] resourceVal  reference to resource value output location
        *  \return                  true if successful
        */
        bool GetIntResource(const char *resourceName, long &resourceVal);
        /** Gets an integer resource by handle (RSO v2)
        *  \param resourceHandle      resource handle
        *  \param[out] resourceVal    reference to resource value output location
        *  \return                    true if successful
        */
        bool GetIntResource(disti::RSOInterface2::ResourceHandle resourceHandle, long &resourceVal);

        /** Sets a float resource by name (RSO v2)
        *  \param resourceName  resource name
        *  \param resourceVal   resource value
        *  \return              true if successful
        */
        bool SetFloatResource(const char *resourceName, double resourceVal);
        /** Sets a float resource by handle (RSO v2)
        *  \param resourceHandle  resource handle
        *  \param resourceVal     resource value
        *  \return                true if successful
        */
        bool SetFloatResource(disti::RSOInterface2::ResourceHandle resourceHandle, double resourceVal);

        /** Gets a float resource by name (RSO v2)
        *  \param resourceName      resource name
        *  \param[out] resourceVal  reference to resource value output location
        *  \return                  true if successful
        */
        bool GetFloatResource(const char *resourceName, double &resourceVal);
        /** Gets a float resource by handle (RSO v2)
        *  \param resourceHandle      resource name
        *  \param[out] resourceVal    reference to resource value output location
        *  \return                    true if successful
        */
        bool GetFloatResource(disti::RSOInterface2::ResourceHandle resourceHandle, double &resourceVal);
    };

    /** Create RSO static
    * This will load the specified DLL and try to create the specified class.
    * It will return the RSO1Reference* on success, and NULL on failure.
    * \param fileName The name of the DLL
    * \param className The class name to create.  If NULL, the default class will be created.
    * \param absolutePlacement Initial value of AbsolutePlacement
    * \return NULL on failure.*/
    RSOReference* LoadRSO(const char* fileName, const char* className = 0, bool absolutePlacement = true);

    /** Delete an RSO reference */
    void DestroyRSO(RSOReference*);

    /** Sets up the OpenGL Pipeline to the state expected by RSO drawing.
    * \param pushState Whether or not to save values. If true, this will call
    *                 glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS) and glPushAttrib(GL_ALL_ATTRIB_BITS). You should call
    *                 RestoreOpenGLState() after drawing to pop the attributes.
    */
    void SetOpenGLDefaultState(bool pushState);

    /** Call this after calling SetOpenGLDefaultState with saveVal == true.
    * DO NOT call this after calling SetOpenGLDefaultState with saveVal == false
    * because this will pop the attribute stack.
    */
    void RestoreOpenGLState();

    /** OpenGLMatrices is used to pass the current OpenGL matrices to PreDraw */
    class OpenGLMatrices : public disti::RSOInterface1::OpenGLMatrices
    {
    protected:
        bool _needsDelete;
    public:
        /** Constructor */
        OpenGLMatrices();
        /** Destructor */
        ~OpenGLMatrices();

        /** Retrieves the current OpenGL Matrices from the
        * OpenGL Subsystem */
        void GetCurrent();
    };

    /** Defines culling parameters (ie- clipping planes for frustum culling) for PreDraw */
    class Culler : public disti::RSOInterface1::Culler
    {
    public:
        /** Culler constructor
        * \param enabled  Whether or not to actually do the culling test
        */
        Culler(bool enabled=true);

        /** Reads the current OpenGL projection matrices and determines the six frustum planes.
        * \param currentMatrices Transformation matrices to apply to culling planes
        */
        void ExtractFrustum(disti::RSOInterface1::OpenGLMatrices& currentMatrices);
    };

    /** Used for specifiying a filter for accessing resources
    */
    class GlsResourceFilter : public disti::RSOInterface1::ResourceFilter
    {
    public:
        int _levelsUp;
        int _groupLevelsDown;
        std::vector<std::string> _excludeList;
        std::vector<std::string> _includeList;
        bool _namesOnly;

    public:
        GlsResourceFilter();
        /// Copy constructor
        GlsResourceFilter(GlsResourceFilter &source);

        virtual ~GlsResourceFilter();

        /** How many levels of qualification above the starting point to show in the attribute names.
        * This is based on the component heirarchy, not the draw hierarchy.
        * For example if you call Altimeter->GetResources() with:
        *  LevelsUp = 0, expect:
        *    Altitude: 1000
        *  LevelsUp = 1, expect:
        *    Altimeter.Altitude:
        *  LevelsUp = 2, expect:
        *    Cockpit.Altimeter.Altitude:
        * -1 means full qualification.
        */
        inline int LevelsUp() const { return _levelsUp; }
        inline void LevelsUp(int value) { _levelsUp = value; }

        /** How many levels of children to show.
        * This is different from LevelsUp because this is based on the draw
        * heirarchy (Groups rather than components).
        * For example with:
        *  GroupLevelsDown = 0, only the specified object's resources will be shown.
        *  GroupLevelsDown = 1, only the immeadiate children of the object's resources will be shown.
        *  GroupLevelsDown = -1, means all children will be shown.
        * Note that the name stays fully qualified for the children.  For example:
        * if GroupLevelsDown == 1 the results would include:
        *    Altimeter.Visible: 1
        *    Altimeter.Group1.Visible: 1
        * but NOT:
        *    Altimeter.Group1.Poly.Visible: 1
        */
        inline int GroupLevelsDown() const { return _groupLevelsDown; }
        inline void GroupLevelsDown(int value) { _groupLevelsDown = value; }

        /** If true, only a list of names will be returned.
        * Values will not be returned.
        * The format changes to not include the ":".
        */
        inline bool NamesOnly() const { return _namesOnly; }
        inline void NamesOnly(bool value) { _namesOnly = value; }

        /** Add a resource name to the exclude filter
        * Resources on the exclude list will not pass the filter.
        * Excludes take precedence over includes
        */
        void AddExclude(const char* name);

        /// Returns the number of exclude entries in the filter
        int ExcludeCount() const;

        /** Returns the resource name for the given exclude list entry
        * \pre index < ExcludeCount()
        */
        const char* GetExclude(int index) const;

        /** Removes a entry from the exclude list
        * This will reduce the ExcludeCount()
        * \pre index < ExcludeCount()
        */
        void RemoveExclude(unsigned int index);

        /// Removes all entries from the exclude list
        void ClearExcludes();

        /** Add a resource name to the include filter
        * If there are no includes specified, all resources
        * will pass the filter by default.
        * If IncludeCount() > 0, then only resources that
        * are included will pass the filter.
        */
        void AddInclude(const char* name);

        /// Returns the number of includes in the filter
        int IncludeCount() const;

        /** Returns the resource name for the given include list entry
        * \pre index < IncludeCount()
        */
        const char* GetInclude(int index) const;

        /** Removes a entry from the include list
        * This will reduce the IncludeCount()
        * \pre index < IncludeCount()
        */
        void RemoveInclude(unsigned int index);

        /// Removes all entries from the include list
        void ClearIncludes();

        /// Test a resource name against the filter
        virtual bool PassFilter(const char* name) const;

        /// assignment operator
        GlsResourceFilter& operator=( const GlsResourceFilter &rhs );
    };
} // end namespace GlsRSOLoader

#endif