src/map/geotiffmap.cpp

   1 #include <QFileInfo>
   2 #include <QPainter>
   3 #include <QImageReader>
   4 #include "config.h"
   5 #include "geotiff.h"
   6 #include "image.h"
   7 #include "geotiffmap.h"
   8
   9
  10 GeoTIFFMap::GeoTIFFMap(const QString &fileName, QObject *parent)
  11   : Map(parent), _fileName(fileName), _img(0), _ratio(1.0), _valid(false)
  12 {
  13         QImageReader ir(fileName);
  14         if (!ir.canRead()) {
  15                 _errorString = "Unsupported/invalid image file";
  16                 return;
  17         }
  18         _size = ir.size();
  19
  20         GeoTIFF gt(fileName);
  21         if (!gt.isValid()) {
  22                 _errorString = gt.errorString();
  23                 return;
  24         } else {
  25                 _projection = gt.projection();
  26                 _transform = gt.transform();
  27         }
  28
  29         _valid = true;
  30 }
  31
  32 GeoTIFFMap::~GeoTIFFMap()
  33 {
  34         delete _img;
  35 }
  36
  37 QString GeoTIFFMap::name() const
  38 {
  39         QFileInfo fi(_fileName);
  40         return fi.fileName();
  41 }
  42
  43 QPointF GeoTIFFMap::ll2xy(const Coordinates &c)
  44 {
  45         return QPointF(_transform.proj2img(_projection.ll2xy(c))) / _ratio;
  46 }
  47
  48 Coordinates GeoTIFFMap::xy2ll(const QPointF &p)
  49 {
  50         return _projection.xy2ll(_transform.img2proj(p * _ratio));
  51 }
  52
  53 QRectF GeoTIFFMap::bounds()
  54 {
  55         return QRectF(QPointF(0, 0), _size / _ratio);
  56 }
  57
  58 void GeoTIFFMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
  59 {
  60         if (_img)
  61                 _img->draw(painter, rect, flags);
  62 }
  63
  64 void GeoTIFFMap::setDevicePixelRatio(qreal ratio)
  65 {
  66         _ratio = ratio;
  67         if (_img)
  68                 _img->setDevicePixelRatio(_ratio);
  69 }
  70
  71 void GeoTIFFMap::load()
  72 {
  73         if (!_img)
  74                 _img = new Image(_fileName);
  75 }
  76
  77 void GeoTIFFMap::unload()
  78 {
  79         delete _img;
  80         _img = 0;
  81 }