/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtOpenGL module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

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** $QT_END_LICENSE$

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****************************************************************************/

#ifndef QGL_H

#define QGL_H

#include <QtGui/qwidget.h>

#include <QtGui/qpaintengine.h>

#include <QtOpenGL/qglcolormap.h>

#include <QtCore/qmap.h>

#include <QtCore/qscopedpointer.h>

QT_BEGIN_HEADER

#if defined(Q_WS_WIN)

# include <QtCore/qt_windows.h>

#endif

#if defined(Q_WS_MAC)

# include <OpenGL/gl.h>

# include <OpenGL/glu.h>

#elif defined(QT_OPENGL_ES_1)

# include <GLES/gl.h>

#ifndef GL_DOUBLE

# define GL_DOUBLE GL_FLOAT

#endif

#ifndef GLdouble

typedef GLfloat GLdouble;

#endif

#elif defined(QT_OPENGL_ES_2)

# include <GLES2/gl2.h>

#ifndef GL_DOUBLE

# define GL_DOUBLE GL_FLOAT

#endif

#ifndef GLdouble

typedef GLfloat GLdouble;

#endif

#else

# include <GL/gl.h>

# ifndef QT_LINUXBASE

#   include <GL/glu.h>

# endif

#endif

QT_BEGIN_NAMESPACE

QT_MODULE(OpenGL)

#if defined(Q_WS_MAC) && defined (QT_BUILD_OPENGL_LIB) && !defined(QT_MAC_USE_COCOA) && !defined(QDOC)

#define Q_MAC_COMPAT_GL_FUNCTIONS

template <typename T>

struct QMacGLCompatTypes

{

    typedef long CompatGLint;

    typedef unsigned long CompatGLuint;

    typedef unsigned long CompatGLenum;

};

template <>

struct QMacGLCompatTypes<long>

{

    typedef int CompatGLint;

    typedef unsigned int CompatGLuint;

    typedef unsigned int CompatGLenum;

};

typedef QMacGLCompatTypes<GLint>::CompatGLint QMacCompatGLint;

typedef QMacGLCompatTypes<GLint>::CompatGLuint QMacCompatGLuint;

typedef QMacGLCompatTypes<GLint>::CompatGLenum QMacCompatGLenum;

#endif

#ifdef QT3_SUPPORT

#define QGL_VERSION        460

#define QGL_VERSION_STR        "4.6"

inline QT3_SUPPORT const char *qGLVersion() {

    return QGL_VERSION_STR;

}

#endif

#if defined(Q_WS_WIN) || defined(Q_WS_MAC)

class QGLCmap;

#endif

class QPixmap;

#if defined(Q_WS_X11) && !defined(QT_OPENGL_ES)

class QGLOverlayWidget;

#endif

class QGLWidgetPrivate;

class QGLContextPrivate;

// Namespace class:

namespace QGL

{

    Q_OPENGL_EXPORT void setPreferredPaintEngine(QPaintEngine::Type engineType);

    enum FormatOption {

        DoubleBuffer            = 0x0001,

        DepthBuffer             = 0x0002,

        Rgba                    = 0x0004,

        AlphaChannel            = 0x0008,

        AccumBuffer             = 0x0010,

        StencilBuffer           = 0x0020,

        StereoBuffers           = 0x0040,

        DirectRendering         = 0x0080,

        HasOverlay              = 0x0100,

        SampleBuffers           = 0x0200,

        DeprecatedFunctions     = 0x0400,

        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,

        NoSampleBuffers         = SampleBuffers   << 16,

        NoDeprecatedFunctions   = DeprecatedFunctions << 16

    };

    Q_DECLARE_FLAGS(FormatOptions, FormatOption)

}

Q_DECLARE_OPERATORS_FOR_FLAGS(QGL::FormatOptions)

class QGLFormatPrivate;

class Q_OPENGL_EXPORT QGLFormat

{

public:

    QGLFormat();

    QGLFormat(QGL::FormatOptions options, int plane = 0);

    QGLFormat(const QGLFormat &other);

    QGLFormat &operator=(const QGLFormat &other);

    ~QGLFormat();

    void setDepthBufferSize(int size);

    int  depthBufferSize() const;

    void setAccumBufferSize(int size);

    int  accumBufferSize() const;

    void setRedBufferSize(int size);

    int  redBufferSize() const;

    void setGreenBufferSize(int size);

    int  greenBufferSize() const;

    void setBlueBufferSize(int size);

    int  blueBufferSize() const;

    void setAlphaBufferSize(int size);

    int  alphaBufferSize() const;

    void setStencilBufferSize(int size);

    int  stencilBufferSize() const;

    void setSampleBuffers(bool enable);

    bool sampleBuffers() const;

    void setSamples(int numSamples);

    int  samples() const;

    void setSwapInterval(int interval);

    int  swapInterval() const;

    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(QGL::FormatOptions opt);

    bool testOption(QGL::FormatOptions opt) const;

    static QGLFormat defaultFormat();

    static void setDefaultFormat(const QGLFormat& f);

    static QGLFormat defaultOverlayFormat();

    static void setDefaultOverlayFormat(const QGLFormat& f);

    static bool hasOpenGL();

    static bool hasOpenGLOverlays();

    void setVersion(int major, int minor);

    int majorVersion() const;

    int minorVersion() const;

    enum OpenGLContextProfile {

        NoProfile,

        CoreProfile,

        CompatibilityProfile

    };

    void setProfile(OpenGLContextProfile profile);

    OpenGLContextProfile profile() const;

    enum OpenGLVersionFlag {

        OpenGL_Version_None               = 0x00000000,

        OpenGL_Version_1_1                = 0x00000001,

        OpenGL_Version_1_2                = 0x00000002,

        OpenGL_Version_1_3                = 0x00000004,

        OpenGL_Version_1_4                = 0x00000008,

        OpenGL_Version_1_5                = 0x00000010,

        OpenGL_Version_2_0                = 0x00000020,

        OpenGL_Version_2_1                = 0x00000040,

        OpenGL_ES_Common_Version_1_0      = 0x00000080,

        OpenGL_ES_CommonLite_Version_1_0  = 0x00000100,

        OpenGL_ES_Common_Version_1_1      = 0x00000200,

        OpenGL_ES_CommonLite_Version_1_1  = 0x00000400,

        OpenGL_ES_Version_2_0             = 0x00000800,

        OpenGL_Version_3_0                = 0x00001000,

        OpenGL_Version_3_1                = 0x00002000,

    };

    Q_DECLARE_FLAGS(OpenGLVersionFlags, OpenGLVersionFlag)

    static OpenGLVersionFlags openGLVersionFlags();

private:

    QGLFormatPrivate *d;

    void detach();

    friend Q_OPENGL_EXPORT bool operator==(const QGLFormat&, const QGLFormat&);

    friend Q_OPENGL_EXPORT bool operator!=(const QGLFormat&, const QGLFormat&);

};

Q_DECLARE_OPERATORS_FOR_FLAGS(QGLFormat::OpenGLVersionFlags)

Q_OPENGL_EXPORT bool operator==(const QGLFormat&, const QGLFormat&);

Q_OPENGL_EXPORT bool operator!=(const QGLFormat&, const QGLFormat&);

class Q_OPENGL_EXPORT QGLContext

{

    Q_DECLARE_PRIVATE(QGLContext)

public:

    QGLContext(const QGLFormat& format, QPaintDevice* device);

    QGLContext(const QGLFormat& format);

    virtual ~QGLContext();

    virtual bool create(const QGLContext* shareContext = 0);

    bool isValid() const;

    bool isSharing() const;

    void reset();

    static bool areSharing(const QGLContext *context1, const QGLContext *context2);

    QGLFormat format() const;

    QGLFormat requestedFormat() const;

    void setFormat(const QGLFormat& format);

    // ### Qt 5: return bools + maybe remove virtuals

    virtual void makeCurrent();

    virtual void doneCurrent();

    virtual void swapBuffers() const;

    enum BindOption {

        NoBindOption                            = 0x0000,

        InvertedYBindOption                     = 0x0001,

        MipmapBindOption                        = 0x0002,

        PremultipliedAlphaBindOption            = 0x0004,

        LinearFilteringBindOption               = 0x0008,

        MemoryManagedBindOption                 = 0x0010, // internal flag

        CanFlipNativePixmapBindOption           = 0x0020, // internal flag

        DefaultBindOption                       = LinearFilteringBindOption

                                                  | InvertedYBindOption

                                                  | MipmapBindOption,

        InternalBindOption                      = MemoryManagedBindOption

                                                  | PremultipliedAlphaBindOption

    };

    Q_DECLARE_FLAGS(BindOptions, BindOption)

    GLuint bindTexture(const QImage &image, GLenum target, GLint format,

                       BindOptions options);

    GLuint bindTexture(const QPixmap &pixmap, GLenum target, GLint format,

                       BindOptions options);

    GLuint bindTexture(const QImage &image, GLenum target = GL_TEXTURE_2D,

                       GLint format = GL_RGBA);

    GLuint bindTexture(const QPixmap &pixmap, GLenum target = GL_TEXTURE_2D,

                       GLint format = GL_RGBA);

    GLuint bindTexture(const QString &fileName);

    void deleteTexture(GLuint tx_id);

    void drawTexture(const QRectF &target, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D);

    void drawTexture(const QPointF &point, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D);

#ifdef Q_MAC_COMPAT_GL_FUNCTIONS

    GLuint bindTexture(const QImage &image, QMacCompatGLenum = GL_TEXTURE_2D,

                       QMacCompatGLint format = GL_RGBA);

    GLuint bindTexture(const QPixmap &pixmap, QMacCompatGLenum = GL_TEXTURE_2D,

                       QMacCompatGLint format = GL_RGBA);

    GLuint bindTexture(const QImage &image, QMacCompatGLenum, QMacCompatGLint format,

                       BindOptions);

    GLuint bindTexture(const QPixmap &pixmap, QMacCompatGLenum, QMacCompatGLint format,

                       BindOptions);

    void deleteTexture(QMacCompatGLuint tx_id);

    void drawTexture(const QRectF &target, QMacCompatGLuint textureId, QMacCompatGLenum textureTarget = GL_TEXTURE_2D);

    void drawTexture(const QPointF &point, QMacCompatGLuint textureId, QMacCompatGLenum textureTarget = GL_TEXTURE_2D);

#endif

    static void setTextureCacheLimit(int size);

    static int textureCacheLimit();

    void *getProcAddress(const QString &proc) const;

    QPaintDevice* device() const;

    QColor overlayTransparentColor() const;

    static const QGLContext* currentContext();

protected:

    virtual bool chooseContext(const QGLContext* shareContext = 0);

#if defined(Q_WS_WIN)

    virtual int choosePixelFormat(void* pfd, HDC pdc);

#endif

#if defined(Q_WS_X11) && defined(QT_NO_EGL)

    virtual void* tryVisual(const QGLFormat& 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 QFont & fnt, int listBase); // ### Qt 5: remove

    uint colorIndex(const QColor& c) const;

    void setValid(bool valid);

    void setDevice(QPaintDevice *pDev);

protected:

    static QGLContext* currentCtx;

private:

    QScopedPointer<QGLContextPrivate> d_ptr;

    friend class QGLPixelBuffer;

    friend class QGLPixelBufferPrivate;

    friend class QGLWidget;

    friend class QGLWidgetPrivate;

    friend class QGLGlyphCache;

    friend class QOpenGLPaintEngine;

    friend class QOpenGLPaintEnginePrivate;

    friend class QGL2PaintEngineEx;

    friend class QGL2PaintEngineExPrivate;

    friend class QGLEngineShaderManager;

    friend class QGLWindowSurface;

    friend class QGLPixmapData;

    friend class QGLPixmapFilterBase;

    friend class QGLTextureGlyphCache;

    friend class QGLContextGroup;

    friend class QGLSharedResourceGuard;

    friend class QGLPixmapBlurFilter;

    friend class QGLExtensions;

    friend QGLFormat::OpenGLVersionFlags QGLFormat::openGLVersionFlags();

#ifdef Q_WS_MAC

public:

    void updatePaintDevice();

private:

    friend class QMacGLWindowChangeEvent;

    friend QGLContextPrivate *qt_phonon_get_dptr(const QGLContext *);

#endif

    friend class QGLFramebufferObject;

    friend class QGLFramebufferObjectPrivate;

    friend class QGLFBOGLPaintDevice;

    friend class QGLPaintDevice;

    friend class QGLWidgetGLPaintDevice;

    friend class QX11GLPixmapData;

    friend class QX11GLSharedContexts;

private:

    Q_DISABLE_COPY(QGLContext)

};

Q_DECLARE_OPERATORS_FOR_FLAGS(QGLContext::BindOptions)

class Q_OPENGL_EXPORT QGLWidget : public QWidget

{

    Q_OBJECT

    Q_DECLARE_PRIVATE(QGLWidget)

public:

    explicit QGLWidget(QWidget* parent=0,

                       const QGLWidget* shareWidget = 0, Qt::WindowFlags f=0);

    explicit QGLWidget(QGLContext *context, QWidget* parent=0,

                       const QGLWidget* shareWidget = 0, Qt::WindowFlags f=0);

    explicit QGLWidget(const QGLFormat& format, QWidget* parent=0,

                       const QGLWidget* shareWidget = 0, Qt::WindowFlags f=0);

#ifdef QT3_SUPPORT

    QT3_SUPPORT_CONSTRUCTOR QGLWidget(QWidget* parent, const char* name,

                                    const QGLWidget* shareWidget = 0, Qt::WindowFlags f=0);

    QT3_SUPPORT_CONSTRUCTOR QGLWidget(QGLContext *context, QWidget* parent, const char* name,

                                    const QGLWidget* shareWidget = 0, Qt::WindowFlags f=0);

    QT3_SUPPORT_CONSTRUCTOR QGLWidget(const QGLFormat& format, QWidget* parent, const char* name,

                                    const QGLWidget* shareWidget = 0, Qt::WindowFlags f=0);

#endif

    ~QGLWidget();

    void qglColor(const QColor& c) const;

    void qglClearColor(const QColor& c) const;

    bool isValid() const;

    bool isSharing() const;

    // ### Qt 5: return bools

    void makeCurrent();

    void doneCurrent();

    bool doubleBuffer() const;

    void swapBuffers();

    QGLFormat format() const;

    void setFormat(const QGLFormat& format);

    const QGLContext* context() const;

    void setContext(QGLContext* context, const QGLContext* shareContext = 0,

                    bool deleteOldContext = true);

    QPixmap renderPixmap(int w = 0, int h = 0, bool useContext = false);

    QImage grabFrameBuffer(bool withAlpha = false);

    void makeOverlayCurrent();

    const QGLContext* overlayContext() const;

    static QImage convertToGLFormat(const QImage& img);

    void setMouseTracking(bool enable);

    const QGLColormap & colormap() const;

    void  setColormap(const QGLColormap & map);

    void renderText(int x, int y, const QString & str,

                     const QFont & fnt = QFont(), int listBase = 2000);

    void renderText(double x, double y, double z, const QString & str,

                     const QFont & fnt = QFont(), int listBase = 2000);

    QPaintEngine *paintEngine() const;

    GLuint bindTexture(const QImage &image, GLenum target, GLint format,

                       QGLContext::BindOptions options);

    GLuint bindTexture(const QPixmap &pixmap, GLenum target, GLint format,

                       QGLContext::BindOptions options);

    GLuint bindTexture(const QImage &image, GLenum target = GL_TEXTURE_2D,

                       GLint format = GL_RGBA);

    GLuint bindTexture(const QPixmap &pixmap, GLenum target = GL_TEXTURE_2D,

                       GLint format = GL_RGBA);

    GLuint bindTexture(const QString &fileName);

    void deleteTexture(GLuint tx_id);