imagesubmissioncontext_p.h

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// Copyright (C) 2019 Klaralvdalens Datakonsult AB (KDAB).

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QT3DRENDER_RENDER_OPENGL_IMAGESUBMISSIONCONTEXT_P_H

#define QT3DRENDER_RENDER_OPENGL_IMAGESUBMISSIONCONTEXT_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

// of other Qt classes.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <Qt3DCore/QNodeId>

QT_BEGIN_NAMESPACE

namespace Qt3DRender {

namespace Render {

class ShaderImage;

namespace OpenGL {

class GraphicsContext;

class GLTexture;

class Q_AUTOTEST_EXPORT ImageSubmissionContext

public:

    ImageSubmissionContext();

    void initialize(GraphicsContext *context);

    void endDrawing();

    int activateImage(ShaderImage *image, GLTexture *tex);

    void deactivateImages();

private:

    void decayImageScores();

    int assignUnitForImage(Qt3DCore::QNodeId shaderImageId);

    struct ActiveImage

        Qt3DCore::QNodeId shaderImageId;

        GLTexture *texture = nullptr;

        int score = 0;

        bool pinned = false;

};

    std::vector<ActiveImage> m_activeImages;

    GraphicsContext *m_ctx;

};

} // namespace OpenGL

} // namespace Render

} // namespace Qt3DRender

QT_END_NAMESPACE

#endif // QT3DRENDER_RENDER_OPENGL_IMAGESUBMISSIONCONTEXT_P_H