geo/tcChannelFile.h

   1 /***************************************************************************
   2  *   This file is part of Tecorrec.                                        *
   3  *   Copyright 2008 James Hogan <james@albanarts.com>                      *
   4  *                                                                         *
   5  *   Tecorrec is free software: you can redistribute it and/or modify      *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation, either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   Tecorrec is distributed in the hope that it will be useful,           *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with Tecorrec.  If not, write to the Free Software Foundation,  *
  17  *   Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.   *
  18  ***************************************************************************/
  19
  20 #ifndef _tcChannelFile_h_
  21 #define _tcChannelFile_h_
  22
  23 /**
  24  * @file tcChannelFile.h
  25  * @brief An image channel from an image file.
  26  */
  27
  28 #include "tcChannel.h"
  29 #include "tcGeo.h"
  30 #include "tcAffineTransform.h"
  31
  32 class GDALDataset;
  33 class OGRCoordinateTransformation;
  34
  35 /// An image channel from an image file.
  36 class tcChannelFile : public tcChannel
  37 {
  38   public:
  39
  40     /*
  41      * Constructors + destructor
  42      */
  43
  44     /// Primary constructor.
  45     tcChannelFile(const QString& filename, const QString& name, const QString& description, float radianceOffset = 0.0f, float radianceBias = 1.0f);
  46
  47     /// Destructor.
  48     virtual ~tcChannelFile();
  49
  50     /*
  51      * Accessors
  52      */
  53
  54     /// Load the transformation from projection to texture.
  55     const tcAffineTransform2<double> geoToTex() const;
  56
  57     /// Load the transformation from projection to texture.
  58     const tcAffineTransform2<double> texToGeo() const;
  59
  60     /*
  61      * Main image interface
  62      */
  63
  64     // Reimplemented
  65     virtual GLuint thumbnailTexture();
  66
  67   protected:
  68
  69     /*
  70      * Interface for derived class to implement
  71      */
  72
  73     // Reimplemented
  74     virtual void roundPortion(double* x1, double* y1, double* x2, double* y2);
  75
  76     // Reimplemented
  77     virtual tcAbstractPixelData* loadPortion(double x1, double y1, double x2, double y2, bool changed);
  78
  79   private:
  80
  81     /*
  82      * Variables
  83      */
  84
  85     /// Width of the image file.
  86     int m_width;
  87
  88     /// Height of the image file.
  89     int m_height;
  90
  91     /// GDAL dataset object.
  92     GDALDataset* m_dataset;
  93
  94     /// Thumbnail texture.
  95     GLuint m_thumbnail;
  96
  97     /// Transformation from projection to geographical coordinates.
  98     OGRCoordinateTransformation* m_projToGeo;
  99
 100     /// Transformation from geographical coordinates to projection.
 101     OGRCoordinateTransformation* m_geoToProj;
 102
 103     /// Transformation from projection to pixel, lines.
 104     tcAffineTransform2<double> m_pixelsToProj;
 105
 106     /// Transformation from pixel, lines to projection.
 107     tcAffineTransform2<double> m_projToPixels;
 108
 109     /// Transformation from texture to geo.
 110     tcAffineTransform2<double> m_texToGeo;
 111
 112     /// Transformation from geo to texture.
 113     tcAffineTransform2<double> m_geoToTex;
 114 };
 115
 116 #endif