// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QSGTEXTURE_P_H
#define QSGTEXTURE_P_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 <QtQuick/private/qtquickglobal_p.h>
#include <private/qobject_p.h>
#include "qsgtexture.h"

QT_BEGIN_NAMESPACE

struct QSGSamplerDescription
{
    QSGTexture::Filtering filtering = QSGTexture::Nearest;
    QSGTexture::Filtering mipmapFiltering = QSGTexture::None;
    QSGTexture::WrapMode horizontalWrap = QSGTexture::ClampToEdge;
    QSGTexture::WrapMode verticalWrap = QSGTexture::ClampToEdge;
    QSGTexture::AnisotropyLevel anisotropylevel = QSGTexture::AnisotropyNone;

    static QSGSamplerDescription fromTexture(QSGTexture *t);
};

Q_DECLARE_TYPEINFO(QSGSamplerDescription, Q_RELOCATABLE_TYPE);

bool operator==(const QSGSamplerDescription &a, const QSGSamplerDescription &b) noexcept;
bool operator!=(const QSGSamplerDescription &a, const QSGSamplerDescription &b) noexcept;
size_t qHash(const QSGSamplerDescription &s, size_t seed = 0) noexcept;

#if QT_CONFIG(opengl)
class Q_QUICK_EXPORT QSGTexturePlatformOpenGL : public QNativeInterface::QSGOpenGLTexture
{
public:
    QSGTexturePlatformOpenGL(QSGTexture *t) : m_texture(t) { }
    QSGTexture *m_texture;

    GLuint nativeTexture() const override;
};
#endif

#ifdef Q_OS_WIN
class Q_QUICK_EXPORT QSGTexturePlatformD3D11 : public QNativeInterface::QSGD3D11Texture
{
public:
    QSGTexturePlatformD3D11(QSGTexture *t) : m_texture(t) { }
    QSGTexture *m_texture;

    void *nativeTexture() const override;
};
class Q_QUICK_EXPORT QSGTexturePlatformD3D12 : public QNativeInterface::QSGD3D12Texture
{
public:
    QSGTexturePlatformD3D12(QSGTexture *t) : m_texture(t) { }
    QSGTexture *m_texture;

    int nativeResourceState() const override;
    void *nativeTexture() const override;
};
#endif

#if QT_CONFIG(metal)
class Q_QUICK_EXPORT QSGTexturePlatformMetal : public QNativeInterface::QSGMetalTexture
{
public:
    QSGTexturePlatformMetal(QSGTexture *t) : m_texture(t) { }
    QSGTexture *m_texture;

    QT_OBJC_PROTOCOL(MTLTexture) nativeTexture() const override;
};
#endif

#if QT_CONFIG(vulkan)
class Q_QUICK_EXPORT QSGTexturePlatformVulkan : public QNativeInterface::QSGVulkanTexture
{
public:
    QSGTexturePlatformVulkan(QSGTexture *t) : m_texture(t) { }
    QSGTexture *m_texture;

    VkImage nativeImage() const override;
    VkImageLayout nativeImageLayout() const override;
};
#endif

class Q_QUICK_EXPORT QSGTexturePrivate : public QObjectPrivate
{
    Q_DECLARE_PUBLIC(QSGTexture)
public:
    QSGTexturePrivate(QSGTexture *t);
    static QSGTexturePrivate *get(QSGTexture *t) { return t->d_func(); }
    void resetDirtySamplerOptions();
    bool hasDirtySamplerOptions() const;

    uint wrapChanged : 1;
    uint filteringChanged : 1;
    uint anisotropyChanged : 1;

    uint horizontalWrap : 2;
    uint verticalWrap : 2;
    uint mipmapMode : 2;
    uint filterMode : 2;
    uint anisotropyLevel: 3;

    // While we could make QSGTexturePrivate implement all the interfaces, we
    // rather choose to use separate objects to avoid clashes in the function
    // names and signatures.
#if QT_CONFIG(opengl)
    QSGTexturePlatformOpenGL m_openglTextureAccessor;
#endif
#ifdef Q_OS_WIN
    QSGTexturePlatformD3D11 m_d3d11TextureAccessor;
    QSGTexturePlatformD3D12 m_d3d12TextureAccessor;
#endif
#if QT_CONFIG(metal)
    QSGTexturePlatformMetal m_metalTextureAccessor;
#endif
#if QT_CONFIG(vulkan)
    QSGTexturePlatformVulkan m_vulkanTextureAccessor;
#endif
};

Q_QUICK_EXPORT bool qsg_safeguard_texture(QSGTexture *);

QT_END_NAMESPACE

#endif // QSGTEXTURE_P_H