text: /****************************************************************************
  **
  ** Copyright (C) 2018 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the QtQuick module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
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  ** and conditions see https://www.qt.io/terms-conditions. For further
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  **
  ** GNU Lesser General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU Lesser
  ** General Public License version 3 as published by the Free Software
  ** Foundation and appearing in the file LICENSE.LGPL3 included in the
  ** packaging of this file. Please review the following information to
  ** ensure the GNU Lesser General Public License version 3 requirements
  ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU
  ** General Public License version 2.0 or (at your option) the GNU General
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  ****************************************************************************/
  
  #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 <QtGui/qopengl.h>
  
  #include <QtQuick/QSGTexture>
  #include <QtQuick/private/qsgareaallocator_p.h>
  #include <QtQuick/private/qsgopenglatlastexture_p.h>
  
  QT_BEGIN_NAMESPACE
  
  class QSGCompressedTextureFactory;
  
  namespace QSGCompressedAtlasTexture {
  
  class Texture;
  
  class Atlas : public QSGOpenGLAtlasTexture::AtlasBase
  {
  public:
      Atlas(const QSize &size, uint format);
      ~Atlas();
  
      void generateTexture() override;
      void uploadPendingTexture(int i) override;
  
      Texture *create(const QByteArray &data, int dataLength, int dataOffset, const QSize &size, const QSize &paddedSize);
  
      uint format() const { return m_format; }
  
  private:
      uint m_format;
  };
  
  class Texture : public QSGOpenGLAtlasTexture::TextureBase
  {
      Q_OBJECT
  public:
      Texture(Atlas *atlas, const QRect &textureRect, const QByteArray &data, int dataLength, int dataOffset, 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() const override;
  
      const QByteArray &data() const { return m_data; }
      int sizeInBytes() const { return m_dataLength; }
      int dataOffset() const { return m_dataOffset; }
  
  private:
      QRectF m_texture_coords_rect;
      mutable QSGTexture *m_nonatlas_texture;
      QByteArray m_data;
      QSize m_size;
      int m_dataLength;
      int m_dataOffset;
  };
  
  }
  
  QT_END_NAMESPACE
  
  #endif
  