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#ifndef QVIDEOTEXTUREHELPER_H
#define QVIDEOTEXTUREHELPER_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 <qvideoframeformat.h>
#include <private/qrhi_p.h>

QT_BEGIN_NAMESPACE

class QVideoFrame;

namespace QVideoTextureHelper
{

struct TextureDescription
{
    static constexpr int maxPlanes = 3;
    struct SizeScale {
        int x;
        int y;
    };
    using BytesRequired = int(*)(int stride, int height);

    inline int strideForWidth(int width) const { return (width*strideFactor + 15) & ~15; }
    inline int bytesForSize(QSize s) const { return bytesRequired(strideForWidth(s.width()), s.height()); }

    int nplanes;
    int strideFactor;
    BytesRequired bytesRequired;
    QRhiTexture::Format textureFormat[maxPlanes];
    SizeScale sizeScale[maxPlanes];
};

Q_MULTIMEDIA_EXPORT const TextureDescription *textureDescription(QVideoFrameFormat::PixelFormat format);

Q_MULTIMEDIA_EXPORT QString vertexShaderFileName(QVideoFrameFormat::PixelFormat format);
Q_MULTIMEDIA_EXPORT QString fragmentShaderFileName(QVideoFrameFormat::PixelFormat format);
Q_MULTIMEDIA_EXPORT QByteArray uniformData(const QVideoFrameFormat &format, const QMatrix4x4 &transform, float opacity);
Q_MULTIMEDIA_EXPORT int updateRhiTextures(QVideoFrame frame, QRhi *rhi,
                                           QRhiResourceUpdateBatch *resourceUpdates, QRhiTexture **textures);

}

QT_END_NAMESPACE

#endif