qsgcompressedatlastexture_p.h

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// Copyright (C) 2018 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 QSGCOMPRESSEDATLASTEXTURE_P_H
#define QSGCOMPRESSEDATLASTEXTURE_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 <QtCore/QSize>
 
#include <QtQuick/QSGTexture>
#include <QtQuick/private/qsgareaallocator_p.h>
#include <QtQuick/private/qsgrhiatlastexture_p.h>
 
QT_BEGIN_NAMESPACE
 
class QSGCompressedTextureFactory;
 
namespace QSGCompressedAtlasTexture {
 
class Texture;
 
class Atlas : public QSGRhiAtlasTexture::AtlasBase
{
public:
    Atlas(QSGDefaultRenderContext *rc, const QSize &size, uint format);
    ~Atlas();
 
    bool generateTexture() override;
    void enqueueTextureUpload(QSGRhiAtlasTexture::TextureBase *t,
                              QRhiResourceUpdateBatch *rcub) override;
 
    Texture *create(QByteArrayView data, const QSize &size);
 
    uint format() const { return m_format; }
 
private:
    uint m_format;
};
 
class Texture : public QSGRhiAtlasTexture::TextureBase
{
    Q_OBJECT
public:
    Texture(Atlas *atlas, const QRect &textureRect, QByteArrayView data, const QSize &size);
    ~Texture();
 
    QSize textureSize() const override { return m_size; }
    bool hasAlphaChannel() const override;
    bool hasMipmaps() const override { return false; }
 
    QRectF normalizedTextureSubRect() const override { return m_texture_coords_rect; }
 
    QSGTexture *removedFromAtlas(QRhiResourceUpdateBatch *) const override;
 
    const QByteArray &data() const { return m_data; }
    int sizeInBytes() const { return m_data.size(); }
 
private:
    QRectF m_texture_coords_rect;
    mutable QSGTexture *m_nonatlas_texture;
    QByteArray m_data;
    QSize m_size;
};
 
}
 
QT_END_NAMESPACE
 
#endif