---

OpenGLViewportC.h

#ifndef __DEMOPAJA_OPENGLVIEWPORTC_H__
#define __DEMOPAJA_OPENGLVIEWPORTC_H__

#include "PajaTypes.h"
#include "DeviceInterfaceI.h"
#include "GraphicsViewportI.h"
#include "Vector2C.h"
#include "BBox2C.h"
#include <gl\gl.h>


namespace PajaSystem {

    const PluginClass::ClassIdC CLASS_OPENGL_VIEWPORT = PluginClass::ClassIdC( 0, 10001 );



    class OpenGLViewportC : public GraphicsViewportI
    {
    public:

        virtual Edit::DataBlockI*               create();
        static OpenGLViewportC*                 create_new();
        virtual PluginClass::ClassIdC           get_class_id() const;
        virtual const char*                     get_class_name();


        virtual void                set_perspective( const PajaTypes::BBox2C& rBBox, PajaTypes::float32 f32FOV, PajaTypes::float32 f32Aspect,
                                        PajaTypes::float32 f32ZNear, PajaTypes::float32 f32ZFar );


        virtual void                set_ortho( const PajaTypes::BBox2C& rBBox,
                                        PajaTypes::float32 f32Left, PajaTypes::float32 f32Right,
                                        PajaTypes::float32 f32Top, PajaTypes::float32 f32Bottom,
                                        PajaTypes::float32 f32ZNear = -1, PajaTypes::float32 f32ZFar = 1 );

        virtual void                set_ortho_pixel( const PajaTypes::BBox2C& rBBox, PajaTypes::float32 f32ZNear = -1, PajaTypes::float32 f32ZFar = 1 );

        virtual PajaTypes::Vector2C client_to_layout( const PajaTypes::Vector2C& rVec );
        virtual PajaTypes::Vector2C layout_to_client( const PajaTypes::Vector2C& rVec );
        virtual PajaTypes::Vector2C delta_client_to_layout( const PajaTypes::Vector2C& rVec );
        virtual PajaTypes::Vector2C delta_layout_to_client( const PajaTypes::Vector2C& rVec );

        virtual const PajaTypes::BBox2C&    get_viewport();
        virtual const PajaTypes::BBox2C&    get_layout();
        virtual PajaTypes::int32            get_width();
        virtual PajaTypes::int32            get_height();
        virtual PajaTypes::float32          get_pixel_aspect_ratio();

        virtual void                set_pixel_aspect_ratio( PajaTypes::float32 f32PixelAspect );
        virtual void                set_dimension( PajaTypes::int32 i32PosX, PajaTypes::int32 i32PosY, PajaTypes::int32 i32Width, PajaTypes::int32 i32Height );
        virtual void                set_viewport( const PajaTypes::BBox2C& rViewport );
        virtual void                set_layout( const PajaTypes::BBox2C& rLayout );

        virtual void                activate();

    protected:
        OpenGLViewportC();
        virtual ~OpenGLViewportC();

    private:
        void                        set_scissor( const PajaTypes::BBox2C& rBBox );
        void                        recalc_mapping();

        PajaTypes::BBox2C   m_rViewport;            // The viewport size in paja (include pan and zoom).
        PajaTypes::BBox2C   m_rLayout;              // Layout bbox.
        PajaTypes::int32    m_i32Width;             // Actual screen size in pixels.
        PajaTypes::int32    m_i32Height;
        PajaTypes::int32    m_i32PosX;              // Position of lower left corner in pixels.
        PajaTypes::int32    m_i32PosY;
        PajaTypes::float64  m_f64LayoutAspectX;     // Conversion variables.
        PajaTypes::float64  m_f64LayoutAspectY;
        PajaTypes::float64  m_f64ClientAspectX;
        PajaTypes::float64  m_f64ClientAspectY;

        PajaTypes::float32  m_f32PixelsAspect;

        // Current viewport.
        enum ViewportTypeE {
            OPENGL_VIEWPORT_ORTHO = 0,
            OPENGL_VIEWPORT_PERSPECTIVE,
            OPENGL_VIEWPORT_ORTHO_PIXEL,
        };
        PajaTypes::uint32   m_ui32ViewportType;
        PajaTypes::int32    m_i32ScissorX;
        PajaTypes::int32    m_i32ScissorY;
        PajaTypes::int32    m_i32ScissorWidth;
        PajaTypes::int32    m_i32ScissorHeight;
        PajaTypes::float64  m_f64FrustumLeft;
        PajaTypes::float64  m_f64FrustumRight;
        PajaTypes::float64  m_f64FrustumBottom;
        PajaTypes::float64  m_f64FrustumTop;
        PajaTypes::float64  m_f64FrustumNearZ;
        PajaTypes::float64  m_f64FrustumFarZ;
    };

};

#endif // __OpenGLViewportC_H__

---