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# ntqgl.h

This is the verbatim text of the ntqgl.h include file. It is provided only for illustration; the copyright remains with Trolltech.

    /****************************************************************************
    ** $Id: qt/ntqgl.h   3.3.8   edited Jan 11 14:38 $
    **
    ** Definition of OpenGL classes for TQt
    **
    ** Created : 970112
    **
    ** Copyright (C) 1992-2007 Trolltech ASA.  All rights reserved.
    **
    ** This file is part of the opengl module of the TQt GUI Toolkit.
    **
    ** This file may be used under the terms of the GNU General Public
    ** License versions 2.0 or 3.0 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file. Alternatively you may (at your option) use any
    ** later version of the GNU General Public License if such license has
    ** been publicly approved by Trolltech ASA (or its successors, if any)
    ** and the KDE Free TQt Foundation.
    **
    ** Please review the following information to ensure GNU General
    ** Public Licensing requirements will be met:
    ** http://trolltech.com/products/qt/licenses/licensing/opensource/.
    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
    ** or contact the sales department at sales@trolltech.com.
    **
    ** This file may be used under the terms of the Q Public License as
    ** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
    ** included in the packaging of this file.  Licensees holding valid TQt
    ** Commercial licenses may use this file in accordance with the TQt
    ** Commercial License Agreement provided with the Software.
    **
    ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
    ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
    ** herein.
    **
    **********************************************************************/

    #ifndef TQGL_H
    #define TQGL_H

    #ifndef QT_H
    #include "ntqwidget.h"
    #include "ntqglcolormap.h"
    #endif // QT_H

    #if !defined( TQT_MODULE_OPENGL ) || defined( QT_LICENSE_PROFESSIONAL )
    #define TQM_EXPORT_OPENGL
    #else
    #define TQM_EXPORT_OPENGL TQ_EXPORT
    #endif

    #ifndef TQT_NO_COMPAT
    #define TQGL_VERSION	450
    #define TQGL_VERSION_STR	"4.5"
    TQM_EXPORT_OPENGL inline const char *qGLVersion() {
        tqObsolete( 0, "qGLVersion", "qVersion" );
        return TQGL_VERSION_STR;
    }
    #endif

    #if defined(Q_WS_WIN)
    # include "qt_windows.h"
    #endif

    #if defined(Q_WS_MAC)
    #if !defined( TQMAC_OPENGL_DOUBLEBUFFER )
    /* This macro is different now. If the macro is not defined TQGLWidget will
     * try to determine when you need double buffering.  If set to 0 it will
     * never double buffer and *can* be acclerated. If set to 1 (the default)
     * it will always double buffer. Unlike before the value of this macro does
     * not upset binary compatability either. */
    #if QT_MACOSX_VERSION >= 0x1020
    # define TQMAC_OPENGL_DOUBLEBUFFER 0
    #endif
    #endif
    # include <OpenGL/gl.h>
    # include <OpenGL/glu.h>
    #else
    # include <GL/gl.h>
    # include <GL/glu.h>
    #endif

    #if defined(Q_WS_WIN) || defined(Q_WS_MAC)
    class TQGLCmap;
    #endif

    class TQPixmap;
    #if defined(Q_WS_X11)
    class TQGLOverlayWidget;
    #endif

    // Namespace class:
    class TQM_EXPORT_OPENGL TQGL
    {
    public:
        enum FormatOption {
    	DoubleBuffer		= 0x0001,
    	DepthBuffer		= 0x0002,
    	Rgba			= 0x0004,
    	AlphaChannel		= 0x0008,
    	AccumBuffer		= 0x0010,
    	StencilBuffer		= 0x0020,
    	StereoBuffers		= 0x0040,
    	DirectRendering		= 0x0080,
    	HasOverlay		= 0x0100,
    	SingleBuffer            = DoubleBuffer  << 16,
    	NoDepthBuffer           = DepthBuffer   << 16,
    	ColorIndex              = Rgba          << 16,
    	NoAlphaChannel          = AlphaChannel  << 16,
    	NoAccumBuffer           = AccumBuffer   << 16,
    	NoStencilBuffer         = StencilBuffer << 16,
    	NoStereoBuffers         = StereoBuffers << 16,
    	IndirectRendering       = DirectRendering << 16,
    	NoOverlay		= HasOverlay << 16
        };
    };

    class TQM_EXPORT_OPENGL TQGLFormat : public TQGL
    {
    public:
        TQGLFormat();
        TQGLFormat( int options, int plane = 0 );

        bool doubleBuffer() const;
        void setDoubleBuffer( bool enable );
        bool depth() const;
        void setDepth( bool enable );
        bool rgba() const;
        void setRgba( bool enable );
        bool alpha() const;
        void setAlpha( bool enable );
        bool accum() const;
        void setAccum( bool enable );
        bool stencil() const;
        void setStencil( bool enable );
        bool stereo() const;
        void setStereo( bool enable );
        bool directRendering() const;
        void setDirectRendering( bool enable );
        bool hasOverlay() const;
        void setOverlay( bool enable );

        int plane() const;
        void setPlane( int plane );

        void setOption( FormatOption opt );
        bool testOption( FormatOption opt ) const;

        static TQGLFormat defaultFormat();
        static void setDefaultFormat( const TQGLFormat& f );

        static TQGLFormat defaultOverlayFormat();
        static void setDefaultOverlayFormat( const TQGLFormat& f );

        static bool hasOpenGL();
        static bool hasOpenGLOverlays();

        friend TQM_EXPORT_OPENGL bool operator==( const TQGLFormat&,
    					     const TQGLFormat& );
        friend TQM_EXPORT_OPENGL bool operator!=( const TQGLFormat&,
    					     const TQGLFormat& );
    private:
        uint opts;
        int pln;
    };

    TQM_EXPORT_OPENGL bool operator==( const TQGLFormat&, const TQGLFormat& );
    TQM_EXPORT_OPENGL bool operator!=( const TQGLFormat&, const TQGLFormat& );

    class TQM_EXPORT_OPENGL TQGLContext : public TQGL
    {
    public:
        TQGLContext( const TQGLFormat& format, TQPaintDevice* device );
        TQGLContext( const TQGLFormat& format );
        virtual ~TQGLContext();

        virtual bool create( const TQGLContext* shareContext = 0 );
        bool isValid() const;
        bool isSharing() const;
        virtual void reset();

        TQGLFormat format() const;
        TQGLFormat requestedFormat() const;
        virtual void setFormat( const TQGLFormat& format );

        virtual void makeCurrent();
        virtual void swapBuffers() const;

        TQPaintDevice* device() const;

        TQColor overlayTransparentColor() const;

        static const TQGLContext* currentContext();

    protected:
        virtual bool chooseContext( const TQGLContext* shareContext = 0 );
        virtual void doneCurrent(); // ### 4.0: make this public - needed for multithreading stuff

    #if defined(Q_WS_WIN)
        virtual int choosePixelFormat( void* pfd, HDC pdc );
    #endif
    #if defined(Q_WS_X11)
        virtual void* tryVisual( const TQGLFormat& f, int bufDepth = 1 );
        virtual void* chooseVisual();
    #endif
    #if defined(Q_WS_MAC)
        virtual void* chooseMacVisual(GDHandle);
    #endif

        bool deviceIsPixmap() const;
        bool windowCreated() const;
        void setWindowCreated( bool on );
        bool initialized() const;
        void setInitialized( bool on );
        void generateFontDisplayLists( const TQFont & fnt, int listBase );

        uint colorIndex( const TQColor& c ) const;
        void setValid( bool valid );
        void setDevice( TQPaintDevice *pDev );

    protected:
    #if  defined(Q_WS_WIN)
        HGLRC rc;
        HDC dc;
        WId	win;
        int pixelFormatId;
        TQGLCmap* cmap;
    #elif defined(Q_WS_X11) || defined(Q_WS_MAC)
        void* vi;
        void* cx;
    #if defined(Q_WS_X11)
        TQ_UINT32 gpm;
    #endif
    #endif
        TQGLFormat glFormat;
        TQGLFormat reqFormat;
        static TQGLContext*	currentCtx;

    private:
        void init( TQPaintDevice *dev = 0 );
        class Private {
        public:
    	bool valid;
    	bool sharing;
    	bool initDone;
    	bool crWin;
    	TQPaintDevice* paintDevice;
    	TQColor transpColor;
    #ifdef Q_WS_MAC
    	TQRect oldR;
    #endif
        };
        Private* d;

        friend class TQGLWidget;
    #ifdef Q_WS_MAC
        void fixBufferRect();
    #endif

    private:	// Disabled copy constructor and operator=
        TQGLContext() {}
        TQGLContext( const TQGLContext& ) {}
        TQGLContext& operator=( const TQGLContext& ) { return *this; }
    };

    class TQM_EXPORT_OPENGL TQGLWidget : public TQWidget, public TQGL
    {
        TQ_OBJECT
    public:
        TQGLWidget( TQWidget* parent=0, const char* name=0,
    	       const TQGLWidget* shareWidget = 0, WFlags f=0 );
        TQGLWidget( TQGLContext *context, TQWidget* parent, const char* name=0,
    	       const TQGLWidget* shareWidget = 0, WFlags f=0 );
        TQGLWidget( const TQGLFormat& format, TQWidget* parent=0, const char* name=0,
    	       const TQGLWidget* shareWidget = 0, WFlags f=0 );
        ~TQGLWidget();

        void qglColor( const TQColor& c ) const;
        void qglClearColor( const TQColor& c ) const;

        bool isValid() const;
        bool isSharing() const;
        virtual void makeCurrent();
        void doneCurrent();

        bool doubleBuffer() const;
        virtual void swapBuffers();

        TQGLFormat format() const;
    #ifndef Q_QDOC
        virtual void setFormat( const TQGLFormat& format );
    #endif

        const TQGLContext* context() const;
    #ifndef Q_QDOC
        virtual void setContext( TQGLContext* context,
    			     const TQGLContext* shareContext = 0,
    			     bool deleteOldContext = TRUE );
    #endif

        virtual TQPixmap renderPixmap( int w = 0, int h = 0,
    				  bool useContext = FALSE );
        virtual TQImage grabFrameBuffer( bool withAlpha = FALSE );

        virtual void makeOverlayCurrent();
        const TQGLContext* overlayContext() const;

        static TQImage convertToGLFormat( const TQImage& img );

        void setMouseTracking( bool enable );
        virtual void  reparent( TQWidget* parent, WFlags f, const TQPoint& p,
    			    bool showIt = FALSE );

        const TQGLColormap & colormap() const;
        void  setColormap( const TQGLColormap & map );

        void renderText( int x, int y, const TQString & str,
    		     const TQFont & fnt = TQFont(), int listBase = 2000 );
        void renderText( double x, double y, double z, const TQString & str,
    		     const TQFont & fnt = TQFont(), int listBase = 2000 );
    public slots:
        virtual void updateGL();
        virtual void updateOverlayGL();

    protected:
        virtual void initializeGL();
        virtual void resizeGL( int w, int h );
        virtual void paintGL();

        virtual void initializeOverlayGL();
        virtual void resizeOverlayGL( int w, int h );
        virtual void paintOverlayGL();

        void setAutoBufferSwap( bool on );
        bool autoBufferSwap() const;

        void paintEvent( TQPaintEvent* );
        void resizeEvent( TQResizeEvent* );

        virtual void glInit();
        virtual void glDraw();

    private:
        int displayListBase( const TQFont & fnt, int listBase );
        void cleanupColormaps();
        void init( TQGLContext *context, const TQGLWidget* shareWidget );
        bool renderCxPm( TQPixmap* pm );
        TQGLContext* glcx;
        bool autoSwap;

        TQGLColormap cmap;

    #if defined(Q_WS_WIN) || defined(Q_WS_MAC)
        TQGLContext* olcx;
    #elif defined(Q_WS_X11)
        TQGLOverlayWidget*	olw;
        friend class TQGLOverlayWidget;
    #endif

    private:	// Disabled copy constructor and operator=
    #if defined(TQ_DISABLE_COPY)
        TQGLWidget( const TQGLWidget& );
        TQGLWidget& operator=( const TQGLWidget& );
    #endif

    #if defined(Q_WS_MAC)
    private:
        const TQGLContext *slcx;
        uint pending_fix : 1,
    	 glcx_dblbuf : 2,
    	 dblbuf : 1,
    	 clp_serial : 15;
        TQPixmap *gl_pix;
        TQGLFormat req_format;

        void macInternalRecreateContext( TQGLContext *ctx,
    				     const TQGLContext* = NULL,
    				     bool update = TRUE );
        bool macInternalDoubleBuffer( bool fix = TRUE );
        virtual void setRegionDirty( bool );
        virtual void macWidgetChangedWindow();
    #endif
    private slots:
        void macInternalFixBufferRect();
    };

    //
    // TQGLFormat inline functions
    //

    inline bool TQGLFormat::doubleBuffer() const
    {
        return testOption( DoubleBuffer );
    }

    inline bool TQGLFormat::depth() const
    {
        return testOption( DepthBuffer );
    }

    inline bool TQGLFormat::rgba() const
    {
        return testOption( Rgba );
    }

    inline bool TQGLFormat::alpha() const
    {
        return testOption( AlphaChannel );
    }

    inline bool TQGLFormat::accum() const
    {
        return testOption( AccumBuffer );
    }

    inline bool TQGLFormat::stencil() const
    {
        return testOption( StencilBuffer );
    }

    inline bool TQGLFormat::stereo() const
    {
        return testOption( StereoBuffers );
    }

    inline bool TQGLFormat::directRendering() const
    {
        return testOption( DirectRendering );
    }

    inline bool TQGLFormat::hasOverlay() const
    {
        return testOption( HasOverlay );
    }

    //
    // TQGLContext inline functions
    //

    inline bool TQGLContext::isValid() const
    {
        return d->valid;
    }

    inline void TQGLContext::setValid( bool valid )
    {
        d->valid = valid;
    }

    inline bool TQGLContext::isSharing() const
    {
        return d->sharing;
    }

    inline TQGLFormat TQGLContext::format() const
    {
        return glFormat;
    }

    inline TQGLFormat TQGLContext::requestedFormat() const
    {
        return reqFormat;
    }

    inline TQPaintDevice* TQGLContext::device() const
    {
        return d->paintDevice;
    }

    inline bool TQGLContext::deviceIsPixmap() const
    {
        return d->paintDevice->devType() == TQInternal::Pixmap;
    }

    inline bool TQGLContext::windowCreated() const
    {
        return d->crWin;
    }

    inline void TQGLContext::setWindowCreated( bool on )
    {
        d->crWin = on;
    }

    inline bool TQGLContext::initialized() const
    {
        return d->initDone;
    }

    inline void TQGLContext::setInitialized( bool on )
    {
        d->initDone = on;
    }

    inline const TQGLContext* TQGLContext::currentContext()
    {
        return currentCtx;
    }

    //
    // TQGLWidget inline functions
    //

    inline TQGLFormat TQGLWidget::format() const
    {
        return glcx->format();
    }

    inline const TQGLContext *TQGLWidget::context() const
    {
        return glcx;
    }

    inline bool TQGLWidget::doubleBuffer() const
    {
        return glcx->format().doubleBuffer();
    }

    inline void TQGLWidget::setAutoBufferSwap( bool on )
    {
        autoSwap = on;
    }

    inline bool TQGLWidget::autoBufferSwap() const
    {
        return autoSwap;
    }

    #endif