qgsgltfutils.h

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/***************************************************************************
  qgsgltfutils.h
  --------------------------------------
  Date                 : July 2023
  Copyright            : (C) 2023 by Martin Dobias
  Email                : wonder dot sk at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSGLTFUTILS_H
#define QGSGLTFUTILS_H
 
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the QGIS API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
 
#define SIP_NO_FILE
 
#include "qgis_core.h"
#include "qgis.h"
 
#include <memory>
#include <QVector>
 
class QMatrix4x4;
class QImage;
 
class QgsCoordinateTransform;
class QgsMatrix4x4;
class QgsVector3D;
 
namespace tinygltf
{
  struct Image;
  class Model;
  class Node;
  class TinyGLTF;
}
 
 
class CORE_EXPORT QgsGltfUtils
{
  public:
 
    static bool accessorToMapCoordinates( const tinygltf::Model &model,
                                          int accessorIndex,
                                          const QgsMatrix4x4 &tileTransform,
                                          const QgsCoordinateTransform *ecefToTargetCrs,
                                          const QgsVector3D &tileTranslationEcef,
                                          const QMatrix4x4 *nodeTransform,
                                          Qgis::Axis gltfUpAxis,
                                          QVector<double> &vx, QVector<double> &vy, QVector<double> &vz );
 
    enum class ResourceType
    {
      Embedded, 
      Linked, 
    };
 
    static ResourceType imageResourceType( const tinygltf::Model &model, int index );
 
    static QImage extractEmbeddedImage( const tinygltf::Model &model, int index );
 
    static QString linkedImagePath( const tinygltf::Model &model, int index );
 
    static std::unique_ptr<QMatrix4x4> parseNodeTransform( const tinygltf::Node &node );
 
    static QgsVector3D extractTileTranslation( tinygltf::Model &model, Qgis::Axis upAxis = Qgis::Axis::Y );
 
    static bool loadImageDataWithQImage(
      tinygltf::Image *image, const int image_idx, std::string *err,
      std::string *warn, int req_width, int req_height,
      const unsigned char *bytes, int size, void *user_data );
 
    static bool extractTextureCoordinates( const tinygltf::Model &model, int accessorIndex,
                                           QVector<float> &x, QVector<float> &y );
 
    static bool loadGltfModel( const QByteArray &data, tinygltf::Model &model, QString *errors, QString *warnings );
 
};
 
 
#endif // QGSGLTFUTILS_H