vcglib: img_qt_convert.h Source File

00001 #ifndef IMG_QT_CONVERT_H_
00002 #define IMG_QT_CONVERT_H_
00003 
00004 // implementation of conversione between qimage and basic image types
00005 
00006 #include <QImage>
00007 
00008 namespace img {
00009 
00010 template<typename ScalarType, bool Safe> 
00011 inline void convert_QImage_to_Y(const QImage &source, Image<1,ScalarType,Safe> &destination)
00012 {
00013   assert(!source.isNull());
00014   if(Safe){
00015     if(source.isNull())  throw ImageException("Null source image");
00016   }
00017   destination.setZero(source.width(),source.height());
00018   for (int y_coord = 0; y_coord < source.height(); ++y_coord)
00019     for (int x_coord = 0; x_coord < source.width(); ++x_coord){
00020       destination.setValue(x_coord, y_coord, 0, qGray(source.pixel(x_coord, y_coord)) );
00021     }
00022   destination.attributes.setRange(ScalarType(0.0),ScalarType(255.0));
00023 }
00024 
00025 template<typename ScalarType, bool Safe> 
00026 inline void convert_QImage_to_RGB(const QImage &source, Image<3,ScalarType,Safe> &destination)
00027 {
00028   assert(!source.isNull());
00029   if(Safe){
00030     if(source.isNull())  throw ImageException("Null source image");
00031   }
00032   destination.setZero(source.width(),source.height());
00033   for (int y_coord = 0; y_coord < source.height(); ++y_coord)
00034     for (int x_coord = 0; x_coord < source.width(); ++x_coord){
00035       QRgb qpixel = source.pixel(x_coord, y_coord);
00036       destination.setValue(x_coord, y_coord, 0, qRed(qpixel) );
00037       destination.setValue(x_coord, y_coord, 1, qGreen(qpixel) );
00038       destination.setValue(x_coord, y_coord, 2, qBlue(qpixel) );
00039     }
00040   destination.attributes.setRange(ScalarType(0.0),ScalarType(255.0));
00041 }
00042 
00043 template<typename ScalarType, bool Safe> 
00044 inline void convert_QImage_to_RGBA(const QImage &source, Image<4,ScalarType,Safe> &destination)
00045 {
00046   assert(!source.isNull());
00047   if(Safe){
00048     if(source.isNull())  throw ImageException("Null source image");
00049   }
00050   destination.setZero(source.width(),source.height());
00051   for (int y_coord = 0; y_coord < source.height(); ++y_coord)
00052     for (int x_coord = 0; x_coord < source.width(); ++x_coord){
00053       QRgb qpixel = source.pixel(x_coord, y_coord);
00054       destination.setValue(x_coord, y_coord, 0, qRed(qpixel) );
00055       destination.setValue(x_coord, y_coord, 1, qGreen(qpixel) );
00056       destination.setValue(x_coord, y_coord, 2, qBlue(qpixel) );
00057       destination.setValue(x_coord, y_coord, 3, qAlpha(qpixel) );
00058     }
00059   destination.attributes.setRange(ScalarType(0.0),ScalarType(255.0));
00060 }
00061 
00062 template<typename ScalarType, bool Safe> 
00063 inline void convert_Y_to_QImage(const Image<1,ScalarType,Safe> &source, QImage &destination)
00064 {
00065   assert(source.isValid());
00066   assert(source.attributes.hasRange(0,255));
00067   if(Safe){
00068     if(!source.isValid()) throw ImageException("Invalid source image");
00069     if(!source.attributes.hasRange(0,255)) throw ImageException("Invalid range attribute");
00070   }
00071   destination=QImage(source.width(),source.height(),QImage::Format_RGB32);
00072   for (int y_coord = 0; y_coord < source.height(); ++y_coord)
00073     for (int x_coord = 0; x_coord < source.width(); ++x_coord){
00074       int Y = valueAsInt(clampValue(source.getValue(x_coord,y_coord,0)));
00075           destination.setPixel(x_coord,y_coord,qRgb(Y,Y,Y));
00076     }
00077 }
00078 
00079 template<typename ScalarType, bool Safe> 
00080 inline void convert_RGB_to_QImage(const Image<3,ScalarType,Safe> &source, QImage &destination)
00081 {
00082   assert(source.isValid());
00083   assert(source.attributes.hasRange(ScalarType(0.0),ScalarType(255.0)));
00084   if(Safe){
00085     if(!source.isValid()) throw ImageException("Invalid source image");
00086     if(!source.attributes.hasRange(ScalarType(0.0),ScalarType(255.0))) throw ImageException("Invalid range attribute");
00087   }
00088   destination=QImage(source.width(),source.height(),QImage::Format_RGB32);
00089   for (int y_coord = 0; y_coord < source.height(); ++y_coord)
00090     for (int x_coord = 0; x_coord < source.width(); ++x_coord){
00091           destination.setPixel(x_coord,y_coord,qRgb(valueAsInt(clampValue(source.getValue(x_coord,y_coord,0))),
00092                                                     valueAsInt(clampValue(source.getValue(x_coord,y_coord,1))),
00093                                                     valueAsInt(clampValue(source.getValue(x_coord,y_coord,2))) ));
00094     }
00095 }
00096 
00097 template<typename ScalarType, bool Safe> 
00098 inline void convert_RGBA_to_QImage(const Image<4,ScalarType,Safe> &source, QImage &destination)
00099 {
00100   assert(source.isValid());
00101   assert(source.attributes.hasRange(ScalarType(0.0),ScalarType(255.0)));
00102   if(Safe){
00103     if(!source.isValid()) throw ImageException("Invalid source image");
00104     if(!source.attributes.hasRange(ScalarType(0.0),ScalarType(255.0))) throw ImageException("Invalid range attribute");
00105   }
00106   destination=QImage(source.width(),source.height(),QImage::Format_ARGB32);
00107   for (int y_coord = 0; y_coord < source.height(); ++y_coord)
00108     for (int x_coord = 0; x_coord < source.width(); ++x_coord){
00109           destination.setPixel(x_coord,y_coord,qRgba(valueAsInt(clampValue(source.getValue(x_coord,y_coord,0))),
00110                                                      valueAsInt(clampValue(source.getValue(x_coord,y_coord,1))),
00111                                                      valueAsInt(clampValue(source.getValue(x_coord,y_coord,2))),
00112                                                      valueAsInt(clampValue(source.getValue(x_coord,y_coord,3))) ));
00113     }
00114 }
00115 
00116 } //end namespace img
00117 
00118 #endif /*IMG_QT_CONVERT_H_*/