qt-everywhere-src-5.15.1/qt3d/src/plugins/sceneparsers/assimp/assimphelpers.h

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#ifndef ASSIMPHELPERS_H
#define ASSIMPHELPERS_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.
//

// ASSIMP INCLUDES
#include <assimp/IOStream.hpp>
#include <assimp/IOSystem.hpp>
#include <QtCore/QIODevice>

QT_BEGIN_NAMESPACE

namespace Qt3DRender {
namespace AssimpHelper {

//CUSTOM FILE STREAM
class AssimpIOStream : public Assimp::IOStream
{
public :
    AssimpIOStream(QIODevice *device);
    ~AssimpIOStream();

    size_t Read(void *pvBuffer, size_t pSize, size_t pCount) override;
    size_t Write(const void *pvBuffer, size_t pSize, size_t pCount) override;
    aiReturn Seek(size_t pOffset, aiOrigin pOrigin) override;
    size_t Tell() const override;
    size_t FileSize() const override;
    void Flush() override;

private:
    QIODevice *const m_device;
};

//CUSTOM FILE IMPORTER TO HANDLE QT RESOURCES WITHIN ASSIMP
class AssimpIOSystem : public Assimp::IOSystem
{
public :
    bool Exists(const char *pFile) const override;
    char getOsSeparator() const override;
    Assimp::IOStream *Open(const char *pFile, const char *pMode) override;
    void Close(Assimp::IOStream *pFile) override;
};

} // namespace AssimpHelper
} // namespace Qt3DRender

QT_END_NAMESPACE

#endif // ASSIMPHELPERS_H