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#ifndef QEGLCONVENIENCE_H
#define QEGLCONVENIENCE_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtGui/QSurfaceFormat>
#include <QtCore/QVector>
#include <QtCore/QSizeF>
#include <EGL/egl.h>

QT_BEGIN_NAMESPACE

QVector<EGLint> q_createConfigAttributesFromFormat(const QSurfaceFormat &format);
bool q_reduceConfigAttributes(QVector<EGLint> *configAttributes);
EGLConfig q_configFromGLFormat(EGLDisplay display, const QSurfaceFormat &format, bool highestPixelFormat = false, int surfaceType = EGL_WINDOW_BIT);
QSurfaceFormat q_glFormatFromConfig(EGLDisplay display, const EGLConfig config, const QSurfaceFormat &referenceFormat = QSurfaceFormat());
bool q_hasEglExtension(EGLDisplay display,const char* extensionName);
void q_printEglConfig(EGLDisplay display, EGLConfig config);

#ifdef Q_OS_UNIX
QSizeF q_physicalScreenSizeFromFb(int framebufferDevice, const QSize &screenSize = QSize());
QSize q_screenSizeFromFb(int framebufferDevice);
int q_screenDepthFromFb(int framebufferDevice);
qreal q_refreshRateFromFb(int framebufferDevice);
#endif

class QEglConfigChooser
{
public:
    QEglConfigChooser(EGLDisplay display);
    virtual ~QEglConfigChooser();

    EGLDisplay display() const { return m_display; }

    void setSurfaceType(EGLint surfaceType) { m_surfaceType = surfaceType; }
    EGLint surfaceType() const { return m_surfaceType; }

    void setSurfaceFormat(const QSurfaceFormat &format) { m_format = format; }
    QSurfaceFormat surfaceFormat() const { return m_format; }

    void setIgnoreColorChannels(bool ignore) { m_ignore = ignore; }
    bool ignoreColorChannels() const { return m_ignore; }

    EGLConfig chooseConfig();

protected:
    virtual bool filterConfig(EGLConfig config) const;

private:
    QSurfaceFormat m_format;
    EGLDisplay m_display;
    EGLint m_surfaceType;
    bool m_ignore;

    int m_confAttrRed;
    int m_confAttrGreen;
    int m_confAttrBlue;
    int m_confAttrAlpha;
};


QT_END_NAMESPACE

#endif //QEGLCONVENIENCE_H
