Kstars

fitsoverlay.cpp
1/*
2 SPDX-FileCopyrightText: 2012 Jasem Mutlaq <mutlaqja@ikarustech.com>
3
4 SPDX-License-Identifier: GPL-2.0-or-later
5*/
6
7#include "fitsoverlay.h"
8
9#include "fitsimage.h"
10
11#include <KTemporaryFile>
12#include <KIO/CopyJob>
13#include <KIO/JobUiDelegate>
14
15FITSOverlay::FITSOverlay()
16{
17}
18
19void FITSOverlay::addFITSOverlay(const dms &ra, const dms &dec, const QUrl &imageURL)
20{
21 m_ImageUrl = imageURL;
22 this->ra = ra;
23 this->dec = dec;
24
25 // check URL
26 if (!m_ImageUrl.isValid())
27 kDebug() << "URL is malformed: " << m_ImageUrl;
28
29 // FIXME: check the logic with temporary files. Races are possible
30 {
31 KTemporaryFile tempfile;
32 tempfile.open();
33 file.setFileName(tempfile.fileName());
34 } // we just need the name and delete the tempfile from disc; if we don't do it, a dialog will be show
35
36 loadImageFromURL();
37}
38
39FITSOverlay::~FITSOverlay()
40{
41 if (downloadJob)
42 {
43 // close job quietly, without emitting a result
44 downloadJob->kill(KJob::Quietly);
45 delete downloadJob;
46 }
47
48 qDeleteAll(fList);
49}
50
51void FITSOverlay::loadImageFromURL()
52{
53 QUrl saveURL = QUrl::fromPath(file.fileName());
54 if (!saveURL.isValid())
55 kDebug() << "tempfile-URL is malformed\n";
56
57 qDebug() << "Starting download job for URL " << m_ImageUrl << endl;
58
59 downloadJob = KIO::copy(m_ImageUrl, saveURL); // starts the download asynchron
60 connect(downloadJob, SIGNAL(result(KJob*)), SLOT(downloadReady(KJob*)));
61}
62
63void FITSOverlay::downloadReady(KJob *job)
64{
65 // set downloadJob to 0, but don't delete it - the job will be deleted automatically !!!
66 downloadJob = 0;
67
68 if (job->error())
69 {
70 static_cast<KIO::Job *>(job)->ui()->showErrorMessage();
71 return;
72 }
73
74 file.close(); // to get the newest information from the file and not any information from opening of the file
75
76 qDebug() << "Download OK , opening image now ..." << endl;
77 if (file.exists())
78 {
79 openImage();
80 return;
81 }
82}
83
84void FITSOverlay::openImage()
85{
86 FOverlay *newFO = new FOverlay;
87
88 newFO->image_data = new FITSImage(FITS_NORMAL);
89
90 qDebug() << "Reading FITS file ..." << endl;
91 bool result = newFO->image_data->loadFITS(file.fileName());
92
93 if (result == false)
94 {
95 delete (newFO->image_data);
96 return;
97 }
98
99 qDebug() << "Read successful, creating fits overlay now ..." << endl;
100
101 int image_width, image_height;
102 double min, max, bzero, bscale, val;
103 float *image_buffer;
104
105 image_width = newFO->image_data->getWidth();
106 image_height = newFO->image_data->getHeight();
107 min = newFO->image_data->getMin();
108 max = newFO->image_data->getMax();
109
110 QImage image(image_width, image_height, QImage::Format_Indexed8);
111
112 image_buffer = newFO->image_data->getImageBuffer();
113
114 bscale = 255. / (max - min);
115 bzero = (-min) * (255. / (max - min));
116
117 image.setNumColors(256);
118 for (int i = 0; i < 256; i++)
119 image.setColor(i, qRgb(i, i, i));
120
121 /* Fill in pixel values using indexed map, linear scale */
122 for (int j = 0; j < image_height; j++)
123 for (int i = 0; i < image_width; i++)
124 {
125 val = image_buffer[j * image_width + i];
126 image.setPixel(i, j, ((int)(val * bscale + bzero)));
127 }
128
129 newFO->pix.convertFromImage(image);
130 newFO->ra = ra;
131 newFO->dec = dec;
132 newFO->pix_width = image_width;
133 newFO->pix_height = image_height;
134
135 qDebug() << "Added a new pixmap FITS!" << endl;
136
137 fList.append(newFO);
138}
139
140bool FITSOverlay::contains(const dms &ra, const dms &dec)
141{
142 return false;
143}
144
145#include "fitsoverlay.moc"
KJob::error
int error() const
KJob::kill
bool kill(KJob::KillVerbosity verbosity=KJob::Quietly)
dms
An angle, stored as degrees, but expressible in many ways.
Definition dms.h:38
KIO::copy
KIOCORE_EXPORT CopyJob * copy(const QList< QUrl > &src, const QUrl &dest, JobFlags flags=DefaultFlags)
QFile::exists
bool exists(const QString &fileName)
QFile::fileName
virtual QString fileName() const const override
QFile::setFileName
void setFileName(const QString &name)
QFileDevice::close
virtual void close() override
QList::append
void append(QList< T > &&value)
QObject::connect
QMetaObject::Connection connect(const QObject *sender, PointerToMemberFunction signal, Functor functor)
QPixmap::convertFromImage
bool convertFromImage(const QImage &image, Qt::ImageConversionFlags flags)
Qt::dec
QTextStream & dec(QTextStream &stream)
Qt::endl
QTextStream & endl(QTextStream &stream)
QUrl::isValid
bool isValid() const const
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