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**
** Copyright (C) 2008-2012 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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** This file is part of Qt 3D Studio.
**
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** Alternatively, this file may be used under the terms of the GNU
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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#pragma once
#ifndef QT3DS_RENDER_IMAGE_TEXTURE_DATA_H
#define QT3DS_RENDER_IMAGE_TEXTURE_DATA_H
#include "Qt3DSRender.h"
#include "foundation/Qt3DSFlags.h"

#include <QtCore/qsharedpointer.h>
#include <QtCore/qvector.h>

namespace qt3ds {
namespace render {

    // forward declararion
    class Qt3DSRenderPrefilterTexture;

    struct ImageTextureFlagValues
    {
        enum Enum {
            HasTransparency = 1,
            InvertUVCoords = 1 << 1,
            PreMultiplied = 1 << 2,
        };
    };

    struct SImageTextureFlags : public NVFlags<ImageTextureFlagValues::Enum, QT3DSU32>
    {
        bool HasTransparency() const
        {
            return this->operator&(ImageTextureFlagValues::HasTransparency);
        }
        void SetHasTransparency(bool inValue)
        {
            clearOrSet(inValue, ImageTextureFlagValues::HasTransparency);
        }

        bool IsInvertUVCoords() const
        {
            return this->operator&(ImageTextureFlagValues::InvertUVCoords);
        }
        void SetInvertUVCoords(bool inValue)
        {
            clearOrSet(inValue, ImageTextureFlagValues::InvertUVCoords);
        }

        bool IsPreMultiplied() const
        {
            return this->operator&(ImageTextureFlagValues::PreMultiplied);
        }
        void SetPreMultiplied(bool inValue)
        {
            clearOrSet(inValue, ImageTextureFlagValues::PreMultiplied);
        }
    };

    struct SImageTextureData
    {
        NVRenderTexture2D *m_Texture;
        SImageTextureFlags m_TextureFlags;
        Qt3DSRenderPrefilterTexture *m_BSDFMipMap;

        SImageTextureData()
            : m_Texture(nullptr)
            , m_BSDFMipMap(nullptr)
        {
        }

        SImageTextureData(const SImageTextureData& data)
            : m_Texture(data.m_Texture), m_TextureFlags(data.m_TextureFlags)
            , m_BSDFMipMap(data.m_BSDFMipMap)
        {

        }

        bool operator!=(const SImageTextureData &inOther)
        {
            return m_Texture != inOther.m_Texture || m_TextureFlags != inOther.m_TextureFlags
                || m_BSDFMipMap != inOther.m_BSDFMipMap;
        }
    };

    struct IReloadableCallback
    {
        virtual ~IReloadableCallback() {}
        virtual void onLoad() = 0;
        virtual void onUnload() = 0;
    };

    struct SImage;
    struct SReloadableImageTextureData : public SImageTextureData
    {
        QString m_path;
        bool m_loaded;
        bool m_scanTransparency;
        bool m_bsdfMipmap;
        bool m_initialized;
        QVector<SImage *> m_callbacks;

        SReloadableImageTextureData()
            : SImageTextureData()
            , m_loaded(false), m_scanTransparency(false), m_bsdfMipmap(false), m_initialized(false)
        {
        }
    };

    typedef QSharedPointer<SReloadableImageTextureData> ReloadableTexturePtr;
}
}

#endif