qopenglcontext.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QOPENGLCONTEXT_H
#define QOPENGLCONTEXT_H
 
#include <QtGui/qtguiglobal.h>
 
#ifndef QT_NO_OPENGL
 
#include <QtCore/qnamespace.h>
#include <QtCore/qobject.h>
#include <QtCore/qscopedpointer.h>
#include <QtCore/qset.h>
#include <QtCore/qnativeinterface.h>
 
#include <QtGui/QSurfaceFormat>
 
#ifdef __GLEW_H__
#if defined(Q_CC_GNU)
#warning qopenglfunctions.h is not compatible with GLEW, GLEW defines will be undefined
#warning To use GLEW with Qt, do not include <qopengl.h> or <QOpenGLFunctions> after glew.h
#endif
#endif
 
#include <QtGui/qopengl.h>
 
#include <QtCore/qvariant.h>
 
QT_BEGIN_NAMESPACE
 
class QDebug;
class QOpenGLContextPrivate;
class QOpenGLContextGroupPrivate;
class QOpenGLFunctions;
class QOpenGLExtraFunctions;
class QPlatformOpenGLContext;
 
class QScreen;
class QSurface;
 
class Q_GUI_EXPORT QOpenGLContextGroup : public QObject
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QOpenGLContextGroup)
public:
    ~QOpenGLContextGroup();
 
    QList<QOpenGLContext *> shares() const;
 
    static QOpenGLContextGroup *currentContextGroup();
 
private:
    QOpenGLContextGroup();
 
    friend class QOpenGLContext;
    friend class QOpenGLContextPrivate;
    friend class QOpenGLContextGroupResourceBase;
    friend class QOpenGLSharedResource;
    friend class QOpenGLMultiGroupSharedResource;
};
 
 
class QOpenGLTextureHelper;
 
class Q_GUI_EXPORT QOpenGLContext : public QObject
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QOpenGLContext)
public:
    explicit QOpenGLContext(QObject *parent = nullptr);
    ~QOpenGLContext();
 
    void setFormat(const QSurfaceFormat &format);
    void setShareContext(QOpenGLContext *shareContext);
    void setScreen(QScreen *screen);
 
    bool create();
    bool isValid() const;
 
    QSurfaceFormat format() const;
    QOpenGLContext *shareContext() const;
    QOpenGLContextGroup *shareGroup() const;
    QScreen *screen() const;
 
    GLuint defaultFramebufferObject() const;
 
    bool makeCurrent(QSurface *surface);
    void doneCurrent();
 
    void swapBuffers(QSurface *surface);
    QFunctionPointer getProcAddress(const QByteArray &procName) const;
    QFunctionPointer getProcAddress(const char *procName) const;
 
    QSurface *surface() const;
 
    static QOpenGLContext *currentContext();
    static bool areSharing(QOpenGLContext *first, QOpenGLContext *second);
 
    QPlatformOpenGLContext *handle() const;
    QPlatformOpenGLContext *shareHandle() const;
 
    QOpenGLFunctions *functions() const;
    QOpenGLExtraFunctions *extraFunctions() const;
 
    QSet<QByteArray> extensions() const;
    bool hasExtension(const QByteArray &extension) const;
 
    enum OpenGLModuleType {
        LibGL,
        LibGLES
    };
 
    static OpenGLModuleType openGLModuleType();
 
    bool isOpenGLES() const;
 
    static bool supportsThreadedOpenGL();
    static QOpenGLContext *globalShareContext();
 
    QT_DECLARE_NATIVE_INTERFACE_ACCESSOR(QOpenGLContext)
 
Q_SIGNALS:
    void aboutToBeDestroyed();
 
private:
    friend class QOpenGLContextResourceBase;
    friend class QOpenGLPaintDevice;
    friend class QOpenGLGlyphTexture;
    friend class QOpenGLTextureGlyphCache;
    friend class QOpenGLEngineShaderManager;
    friend class QOpenGLFramebufferObject;
    friend class QOpenGLFramebufferObjectPrivate;
    friend class QOpenGL2PaintEngineEx;
    friend class QOpenGL2PaintEngineExPrivate;
    friend class QSGDistanceFieldGlyphCache;
    friend class QWidgetPrivate;
    friend class QAbstractOpenGLFunctionsPrivate;
    friend class QOpenGLTexturePrivate;
 
    QOpenGLTextureHelper* textureFunctions() const;
    void setTextureFunctions(QOpenGLTextureHelper* textureFuncs, std::function<void()> destroyCallback);
 
    void destroy();
 
    Q_PRIVATE_SLOT(d_func(), void _q_screenDestroyed(QObject *object))
};
 
#ifndef QT_NO_DEBUG_STREAM
Q_GUI_EXPORT QDebug operator<<(QDebug debug, const QOpenGLContext *ctx);
Q_GUI_EXPORT QDebug operator<<(QDebug debug, const QOpenGLContextGroup *cg);
#endif // !QT_NO_DEBUG_STREAM
 
QT_END_NAMESPACE
 
#include <QtGui/qopenglcontext_platform.h>
 
#endif // QT_NO_OPENGL
 
#endif // QOPENGLCONTEXT_H