src/map/geotiffmap.cpp

   1 #include <QPainter>
   2 #include <QImageReader>
   3 #include "geotiff.h"
   4 #include "image.h"
   5 #include "geotiffmap.h"
   6
   7
   8 GeoTIFFMap::GeoTIFFMap(const QString &fileName, QObject *parent)
   9   : Map(fileName, parent), _img(0), _ratio(1.0), _valid(false)
  10 {
  11         QImageReader ir(fileName);
  12         if (!ir.canRead()) {
  13                 _errorString = "Unsupported/invalid image file";
  14                 return;
  15         }
  16         _size = ir.size();
  17
  18         GeoTIFF gt(fileName);
  19         if (!gt.isValid()) {
  20                 _errorString = gt.errorString();
  21                 return;
  22         } else {
  23                 _projection = gt.projection();
  24                 _transform = gt.transform();
  25         }
  26
  27         _valid = true;
  28 }
  29
  30 GeoTIFFMap::~GeoTIFFMap()
  31 {
  32         delete _img;
  33 }
  34
  35 QPointF GeoTIFFMap::ll2xy(const Coordinates &c)
  36 {
  37         return QPointF(_transform.proj2img(_projection.ll2xy(c))) / _ratio;
  38 }
  39
  40 Coordinates GeoTIFFMap::xy2ll(const QPointF &p)
  41 {
  42         return _projection.xy2ll(_transform.img2proj(p * _ratio));
  43 }
  44
  45 QRectF GeoTIFFMap::bounds()
  46 {
  47         return QRectF(QPointF(0, 0), _size / _ratio);
  48 }
  49
  50 void GeoTIFFMap::draw(QPainter *painter, const QRectF &rect, Flags flags)
  51 {
  52         if (_img)
  53                 _img->draw(painter, rect, flags);
  54 }
  55
  56 void GeoTIFFMap::load(const Projection &in, const Projection &out,
  57   qreal deviceRatio, bool hidpi)
  58 {
  59         Q_UNUSED(in);
  60         Q_UNUSED(out);
  61
  62         _ratio = hidpi ? deviceRatio : 1.0;
  63
  64         _img = new Image(path());
  65         if (_img)
  66                 _img->setDevicePixelRatio(_ratio);
  67 }
  68
  69 void GeoTIFFMap::unload()
  70 {
  71         delete _img;
  72         _img = 0;
  73 }
  74
  75 Map *GeoTIFFMap::create(const QString &path, const Projection &proj, bool *isDir)
  76 {
  77         Q_UNUSED(proj);
  78
  79         if (isDir)
  80                 *isDir = false;
  81
  82         return new GeoTIFFMap(path);
  83 }