src/map/geotiffmap.cpp

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