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#ifndef QWINDOWSOPENGLTESTER_H
#define QWINDOWSOPENGLTESTER_H

#include <qtwindowsglobal.h>

#include <QtCore/QByteArray>
#include <QtCore/QFlags>

QT_BEGIN_NAMESPACE

class QDebug;
class QVariant;

struct GpuDriverVersion // ### fixme: Use QVersionNumber in Qt 5.5?
{
    GpuDriverVersion(int p = 0, int v = 0, int sv =0, int b = 0) : product(p), version(v), subVersion(sv), build(b) {}
    QString toString() const;
    int compare(const GpuDriverVersion &rhs) const;

    int product;
    int version;
    int subVersion;
    int build;
};

inline bool operator==(const GpuDriverVersion &v1, const GpuDriverVersion &v2)
    { return !v1.compare(v2); }
inline bool operator!=(const GpuDriverVersion &v1, const GpuDriverVersion &v2)
    { return v1.compare(v2); }
inline bool operator< (const GpuDriverVersion &v1, const GpuDriverVersion &v2)
    { return v1.compare(v2) < 0; }
inline bool operator<=(const GpuDriverVersion &v1, const GpuDriverVersion &v2)
    { return v1.compare(v2) <= 0; }
inline bool operator> (const GpuDriverVersion &v1, const GpuDriverVersion &v2)
    { return v1.compare(v2) > 0; }
inline bool operator>=(const GpuDriverVersion &v1, const GpuDriverVersion &v2)
    { return v1.compare(v2) >= 0; }

QDebug operator<<(QDebug d, const GpuDriverVersion &gd);

struct GpuDescription
{
    GpuDescription() :  vendorId(0), deviceId(0), revision(0), subSysId(0) {}

    static GpuDescription detect();
    QString toString() const;
    QVariant toVariant() const;

    int vendorId;
    int deviceId;
    int revision;
    int subSysId;
    GpuDriverVersion driverVersion;
    QByteArray driverName;
    QByteArray description;
};

QDebug operator<<(QDebug d, const GpuDescription &gd);

class QWindowsOpenGLTester
{
public:
    enum Renderer {
        InvalidRenderer         = 0x0000,
        DesktopGl               = 0x0001,
        AngleRendererD3d11      = 0x0002,
        AngleRendererD3d9       = 0x0004,
        AngleRendererD3d11Warp  = 0x0008, // "Windows Advanced Rasterization Platform"
        AngleBackendMask        = AngleRendererD3d11 | AngleRendererD3d9 | AngleRendererD3d11Warp,
        Gles                    = 0x0010, // ANGLE/unspecified or Generic GLES for Windows CE.
        GlesMask                = Gles | AngleBackendMask,
        SoftwareRasterizer      = 0x0020
    };
    Q_DECLARE_FLAGS(Renderers, Renderer)

    static Renderer requestedGlesRenderer();
    static Renderer requestedRenderer();
    static Renderers supportedGlesRenderers();
    static Renderers supportedRenderers();

    static bool testDesktopGL();
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QWindowsOpenGLTester::Renderers)

QT_END_NAMESPACE

#endif // QWINDOWSOPENGLTESTER_H