-
-
Notifications
You must be signed in to change notification settings - Fork 3k
/
qgsrasterlayer.cpp
5248 lines (4410 loc) · 185 KB
/
qgsrasterlayer.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* **************************************************************************
qgsrasterlayer.cpp - description
-------------------
begin : Sat Jun 22 2002
copyright : (C) 2003 by Tim Sutton, Steve Halasz and Gary E.Sherman
email : tim at linfiniti.com
***************************************************************************/
/* **************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
/* $Id$ */
/*
Please observe the following variable naming guidelines when editing this class:
---------------------------------------------------------------------------------
In my opinion, clarity of code is more important than brevity, so variables should be
given clear, unambiguous names. Variables names should be written in mixed case, with
a lowercase first letter. Each variable name should include a scope resolution
indicator and a type indicator, in the form:
[scope]+[name]+[type]
Where scope resolution indicators are:
- global vars and class members : [none]
- variables passed as parameters to a function/method: the
- variables declared locally in a method or function: my
For example:
class FooClass {
int fooInt; //class var has no prefix
void FooClass::fooMethod (int theBarInt) //function parameter prefixed by 'the'
{
fooInt=1;
int myLocalInt=0; //function members prefixed by 'my'
myLocalInt=fooInt+theBarInt;
}
}
Using this scope resolution naming scheme makes the origin of each variable unambiguous
and the code easy to read (especially by people who did not write it!).
The [name] part of the variable should be short and descriptive, usually a noun.
The [type] part of the variable should be the type class of the variable written out in full.
DEBUG DIRECTIVES:
When compiling you can make sure DEBUG is defined by including -DDEBUG in the gcc command (e.g. gcc -DDEBUG myprog.c ) if you
wish to see edbug messages printed to stdout.
*/
#include "qgslegend.h"
#include "qgslegendlayer.h"
#include <qgslogger.h>
#include "qgsrasterlayer.h"
#include "qgsmaptopixel.h"
#include <cstdio>
#include <cmath>
#include <limits>
#include <iostream>
#include <QApplication>
#include <QCursor>
#include <QPainter>
#include <QImage>
#include <QFont>
#include <QFile>
#include <QFileInfo>
#include <QFontMetrics>
#include <QMatrix>
#include <QMessageBox>
#include <QRegExp>
#include <QSlider>
#include <QLabel>
#include <QDomNode>
#include <QDomElement>
#include <QFrame>
#include <QPixmap>
#include <QSettings>
/*
*
* New includes that will convert this class to a data provider interface
* (B Morley)
*
*/
#include <QLibrary>
/*
* END
*/
#include "qgsrect.h"
#include "qgisapp.h"
#include "qgsapplication.h"
//#include "qgscolortable.h"
#include "qgsrasterlayerproperties.h"
#include "qgsproject.h"
#include "qgsattributeaction.h"
#include "qgsmaplayerregistry.h"
#include "qgsspatialrefsys.h"
#include "qgslogger.h"
/*
*
* New includes that will convert this class to a data provider interface
* (B Morley)
*
*/
#include "qgsproviderregistry.h"
/*
* END
*/
#include "../providers/wms/qgswmsprovider.h"
#include <gdal_priv.h>
//////////////////////////////////////////////////////////
//
// Static Methods and members first....
//
/////////////////////////////////////////////////////////
/**
Static member variable storing the subset of GDAL formats
that we currently support.
@note
Some day this won't be necessary as there'll be a time when
theoretically we'll support everything that GDAL can throw at us.
These are GDAL driver description strings.
*/
static const char *const mSupportedRasterFormats[] =
{
"AAIGrid",
"AIG",
"DTED",
"ECW",
"GRASS",
"GTiff",
"HFA",
"JP2ECW",
"JP2KAK",
"JP2MrSID",
"JPEG2000",
"MrSID",
"SDTS",
"USGSDEM",
"" // used to indicate end of list
};
/**
Builds the list of file filter strings to later be used by
QgisApp::addRasterLayer()
We query GDAL for a list of supported raster formats; we then build
a list of file filter strings from that list. We return a string
that contains this list that is suitable for use in a a
QFileDialog::getOpenFileNames() call.
*/
void QgsRasterLayer::buildSupportedRasterFileFilter(QString & theFileFiltersString)
{
// first get the GDAL driver manager
GDALAllRegister();
GDALDriverManager *myGdalDriverManager = GetGDALDriverManager();
if (!myGdalDriverManager)
{
QgsLogger::warning("unable to get GDALDriverManager");
return; // XXX good place to throw exception if we
} // XXX decide to do exceptions
// then iterate through all of the supported drivers, adding the
// corresponding file filter
GDALDriver *myGdalDriver; // current driver
char **myGdalDriverMetadata; // driver metadata strings
QString myGdalDriverLongName(""); // long name for the given driver
QString myGdalDriverExtension(""); // file name extension for given driver
QString myGdalDriverDescription; // QString wrapper of GDAL driver description
QStringList metadataTokens; // essentially the metadata string delimited by '='
QString catchallFilter; // for Any file(*.*), but also for those
// drivers with no specific file filter
GDALDriver *jp2Driver = NULL; // first JPEG2000 driver found
// Grind through all the drivers and their respective metadata.
// We'll add a file filter for those drivers that have a file
// extension defined for them; the others, welll, even though
// theoreticaly we can open those files because there exists a
// driver for them, the user will have to use the "All Files" to
// open datasets with no explicitly defined file name extension.
// Note that file name extension strings are of the form
// "DMD_EXTENSION=.*". We'll also store the long name of the
// driver, which will be found in DMD_LONGNAME, which will have the
// same form.
for (int i = 0; i < myGdalDriverManager->GetDriverCount(); ++i)
{
myGdalDriver = myGdalDriverManager->GetDriver(i);
Q_CHECK_PTR(myGdalDriver);
if (!myGdalDriver)
{
QgsLogger::warning("unable to get driver " + QString::number(i));
continue;
}
// now we need to see if the driver is for something currently
// supported; if not, we give it a miss for the next driver
myGdalDriverDescription = myGdalDriver->GetDescription();
if (!isSupportedRasterDriver(myGdalDriverDescription))
{
// not supported, therefore skip
QgsDebugMsg("skipping unsupported driver " + QString(myGdalDriver->GetDescription()));
continue;
}
// std::cerr << "got driver string " << myGdalDriver->GetDescription() << "\n";
myGdalDriverMetadata = myGdalDriver->GetMetadata();
// presumably we know we've run out of metadta if either the
// address is 0, or the first character is null
while (myGdalDriverMetadata && '\0' != myGdalDriverMetadata[0])
{
metadataTokens = QStringList::split("=", *myGdalDriverMetadata);
// std::cerr << "\t" << *myGdalDriverMetadata << "\n";
// XXX add check for malformed metadataTokens
// Note that it's oddly possible for there to be a
// DMD_EXTENSION with no corresponding defined extension
// string; so we check that there're more than two tokens.
if (metadataTokens.count() > 1)
{
if ("DMD_EXTENSION" == metadataTokens[0])
{
myGdalDriverExtension = metadataTokens[1];
}
else if ("DMD_LONGNAME" == metadataTokens[0])
{
myGdalDriverLongName = metadataTokens[1];
// remove any superfluous (.*) strings at the end as
// they'll confuse QFileDialog::getOpenFileNames()
myGdalDriverLongName.remove(QRegExp("\\(.*\\)$"));
}
}
// if we have both the file name extension and the long name,
// then we've all the information we need for the current
// driver; therefore emit a file filter string and move to
// the next driver
if (!(myGdalDriverExtension.isEmpty() || myGdalDriverLongName.isEmpty()))
{
// XXX add check for SDTS; in that case we want (*CATD.DDF)
QString glob = "*." + myGdalDriverExtension;
// Add only the first JP2 driver found to the filter list (it's the one GDAL uses)
if (myGdalDriverDescription == "JPEG2000" ||
myGdalDriverDescription.startsWith("JP2")) // JP2ECW, JP2KAK, JP2MrSID
{
if (!jp2Driver)
{
jp2Driver = myGdalDriver; // first JP2 driver found
glob += " *.j2k"; // add alternate extension
}
else break; // skip if already found a JP2 driver
}
theFileFiltersString += myGdalDriverLongName + " (" + glob.lower() + " " + glob.upper() + ");;";
break; // ... to next driver, if any.
}
++myGdalDriverMetadata;
} // each metadata item
if (myGdalDriverExtension.isEmpty() && !myGdalDriverLongName.isEmpty())
{
// Then what we have here is a driver with no corresponding
// file extension; e.g., GRASS. In which case we append the
// string to the "catch-all" which will match all file types.
// (I.e., "*.*") We use the driver description intead of the
// long time to prevent the catch-all line from getting too
// large.
// ... OTOH, there are some drivers with missing
// DMD_EXTENSION; so let's check for them here and handle
// them appropriately
// USGS DEMs use "*.dem"
if (myGdalDriverDescription.startsWith("USGSDEM"))
{
QString glob = "*.dem";
theFileFiltersString += myGdalDriverLongName + " (" + glob.lower() + " " + glob.upper() + ");;";
}
else if (myGdalDriverDescription.startsWith("DTED"))
{
// DTED use "*.dt0"
QString glob = "*.dt0";
theFileFiltersString += myGdalDriverLongName + " (" + glob.lower() + " " + glob.upper() + ");;";
}
else if (myGdalDriverDescription.startsWith("MrSID"))
{
// MrSID use "*.sid"
QString glob = "*.sid";
theFileFiltersString += myGdalDriverLongName + " (" + glob.lower() + " " + glob.upper() + ");;";
}
else
{
catchallFilter += QString(myGdalDriver->GetDescription()) + " ";
}
}
myGdalDriverExtension = myGdalDriverLongName = ""; // reset for next driver
} // each loaded GDAL driver
// can't forget the default case
theFileFiltersString += catchallFilter + tr("and all other files") + " (*)";
QgsDebugMsg("Raster filter list built: " + theFileFiltersString);
} // buildSupportedRasterFileFilter_()
/**
returns true if the given raster driver name is one currently
supported, otherwise it returns false
@param theDriverName GDAL driver description string
*/
bool QgsRasterLayer::isSupportedRasterDriver(QString const &theDriverName)
{
size_t i = 0;
while (mSupportedRasterFormats[i][0]) // while not end of string list
{
// If we've got a case-insensitive match for a GDAL aware driver
// description, then we've got a match. Why case-insensitive?
// I'm just being paranoid in that I can envision a situation
// whereby GDAL slightly changes driver description string case,
// in which case we'd catch it here. Not that that would likely
// happen, but if it does, we'll already compensate.
// GS - At Qt 3.1.2, the case sensitive argument. So we change the
// driverName to lower case before testing
QString format = mSupportedRasterFormats[i];
if (theDriverName.lower().startsWith(format.lower()))
{
return true;
}
i++;
}
return false;
} // isSupportedRasterDriver
/** This helper checks to see whether the filename appears to be a valid raster file name */
bool QgsRasterLayer::isValidRasterFileName(QString const & theFileNameQString)
{
GDALDatasetH myDataset;
GDALAllRegister();
//open the file using gdal making sure we have handled locale properly
myDataset = GDALOpen( QFile::encodeName(theFileNameQString).constData(), GA_ReadOnly );
if( myDataset == NULL )
{
return false;
}
else
{
GDALClose(myDataset);
return true;
}
/*
* This way is no longer a good idea because it does not
* cater for filetypes such as grass rasters that dont
* have a predictable file extension.
*
QString name = theFileNameQString.lower();
return (name.endsWith(".adf") ||
name.endsWith(".asc") ||
name.endsWith(".grd") ||
name.endsWith(".img") ||
name.endsWith(".tif") ||
name.endsWith(".png") ||
name.endsWith(".jpg") ||
name.endsWith(".dem") ||
name.endsWith(".ddf")) ||
name.endsWith(".dt0");
*/
}
//////////////////////////////////////////////////////////
//
// Non Static methods now....
//
/////////////////////////////////////////////////////////
QgsRasterLayer::QgsRasterLayer(QString const & path, QString const & baseName)
: QgsMapLayer(RASTER, baseName, path),
// XXX where is this? popMenu(0), //popMenu is the contextmenu obtained by right clicking on the legend
rasterXDimInt( std::numeric_limits<int>::max() ),
rasterYDimInt( std::numeric_limits<int>::max() ),
showDebugOverlayFlag(false),
invertHistogramFlag(false),
stdDevsToPlotDouble(0),
mTransparencySlider(0x0),
mLayerProperties(0x0),
dataProvider(0)
{
// Initialise the affine transform matrix
adfGeoTransform[0] = 0;
adfGeoTransform[1] = 1;
adfGeoTransform[2] = 0;
adfGeoTransform[3] = 0;
adfGeoTransform[4] = 0;
adfGeoTransform[5] = -1;
// set the layer name (uppercase first character)
if ( ! baseName.isEmpty() ) // XXX shouldn't this happen in parent?
{
setLayerName(baseName);
}
// load the file if one specified
if ( ! path.isEmpty() )
{
readFile( path ); // XXX check for failure?
}
// Transparency slider for popup meni
// QSlider ( int minValue, int maxValue, int pageStep, int value, Orientation orientation, QWidget * parent, const char * name = 0 )
// // emit a signal asking for a repaint
// emit repaintRequested();
} // QgsRasterLayer ctor
QgsRasterLayer::~QgsRasterLayer()
{
if (mProviderKey.isEmpty())
{
GDALClose(gdalDataset);
}
}
void QgsRasterLayer::setupDestSrs()
{
QgsDebugMsg("Layer registry has " + QString::number(QgsMapLayerRegistry::instance()->count()) + "layers");
if (QgsMapLayerRegistry::instance()->count() ==0)
{
mCoordinateTransform->destSRS().createFromProj4(
mCoordinateTransform->sourceSRS().proj4String());
//first layer added will set the default project level projection
//TODO remove cast if poss!
int mySrsId = static_cast<int>(mCoordinateTransform->sourceSRS().srsid());
if (mySrsId)
{
QgsProject::instance()->writeEntry("SpatialRefSys","/ProjectSRSID",mySrsId);
}
}
else
{
mCoordinateTransform->destSRS().createFromSrsId(
QgsProject::instance()->readNumEntry("SpatialRefSys","/ProjectSRSID",0));
}
if (!mCoordinateTransform->destSRS().isValid())
{
mCoordinateTransform->destSRS().validate();
}
}
bool
QgsRasterLayer::readFile( QString const & fileName )
{
GDALAllRegister();
//open the dataset making sure we handle char encoding of locale properly
gdalDataset = (GDALDataset *) GDALOpen(QFile::encodeName(fileName).constData(), GA_ReadOnly);
if (gdalDataset == NULL)
{
valid = FALSE;
return false;
}
// Store timestamp
mLastModified = lastModified ( fileName );
//check f this file has pyramids
GDALRasterBandH myGDALBand = GDALGetRasterBand( gdalDataset, 1 ); //just use the first band
if( GDALGetOverviewCount(myGDALBand) > 0 )
{
hasPyramidsFlag=true;
}
else
{
hasPyramidsFlag=false;
}
//populate the list of what pyramids exist
buildRasterPyramidList();
//load up the pyramid icons
QString myThemePath = QgsApplication::themePath();
QPixmap myPyramidPixmap(myThemePath + "/mIconPyramid.png");
QPixmap myNoPyramidPixmap(myThemePath + "/mIconNoPyramid.png");
// Get the layer's projection info and set up the
// QgsCoordinateTransform for this layer
// NOTE: we must do this before getMetadata is called
mCoordinateTransform = new QgsCoordinateTransform();
QString mySourceWKT = getProjectionWKT();
QgsDebugMsg("--------------------------------------------------------------------------------------");
QgsDebugMsg("QgsRasterLayer::readFile --- using wkt\n" + mySourceWKT);
QgsDebugMsg("--------------------------------------------------------------------------------------");
mCoordinateTransform->sourceSRS().createFromWkt(mySourceWKT);
//get the project projection, defaulting to this layer's projection
//if none exists....
if (!mCoordinateTransform->sourceSRS().isValid())
{
mCoordinateTransform->sourceSRS().validate();
}
setupDestSrs();
// initialise the transform - you should do this any time one of the SRS's changes
mCoordinateTransform->initialise();
getMetadata();
// Use the affine transform to get geo coordinates for
// the corners of the raster
double myXMaxDouble = adfGeoTransform[0] +
gdalDataset->GetRasterXSize() * adfGeoTransform[1] +
gdalDataset->GetRasterYSize() * adfGeoTransform[2];
double myYMinDouble = adfGeoTransform[3] +
gdalDataset->GetRasterXSize() * adfGeoTransform[4] +
gdalDataset->GetRasterYSize() * adfGeoTransform[5];
layerExtent.setXmax(myXMaxDouble);
// The affine transform reduces to these values at the
// top-left corner of the raster
layerExtent.setXmin(adfGeoTransform[0]);
layerExtent.setYmax(adfGeoTransform[3]);
layerExtent.setYmin(myYMinDouble);
//
// Set up the x and y dimensions of this raster layer
//
rasterXDimInt = gdalDataset->GetRasterXSize();
rasterYDimInt = gdalDataset->GetRasterYSize();
//
// Determin the no data value
//
noDataValueDouble = gdalDataset->GetRasterBand(1)->GetNoDataValue();
//initialise the raster band stats vector
for (int i = 1; i <= gdalDataset->GetRasterCount(); i++)
{
GDALRasterBand *myGdalBand = gdalDataset->GetRasterBand(i);
QString myColorQString = GDALGetColorInterpretationName(myGdalBand->GetColorInterpretation());
QgsRasterBandStats myRasterBandStats;
myRasterBandStats.bandName = myColorQString ;
//myRasterBandStats.bandName=QString::number(i) + " : " + myColorQString;
myRasterBandStats.bandNoInt = i;
myRasterBandStats.statsGatheredFlag = false;
myRasterBandStats.histogramVector = new QgsRasterBandStats::HistogramVector();
// Read color table
readColorTable ( myGdalBand, &(myRasterBandStats.colorTable) );
rasterStatsVector.push_back(myRasterBandStats);
}
//decide what type of layer this is...
//note that multiband images can have one or more 'undefindd' bands,
//so we must do this check first!
if ((gdalDataset->GetRasterCount() > 1))
{
rasterLayerType = MULTIBAND;
}
else if (hasBand("Palette")) //dont tr() this its a gdal word!
{
rasterLayerType = PALETTE;
}
else
{
rasterLayerType = GRAY_OR_UNDEFINED;
}
if (rasterLayerType == PALETTE)
{
redBandNameQString = "Red"; // sensible default
greenBandNameQString = "Green"; // sensible default
blueBandNameQString = "Blue";// sensible default
grayBandNameQString = tr("Not Set"); //sensible default
drawingStyle = PALETTED_MULTI_BAND_COLOR; //sensible default
}
else if (rasterLayerType == MULTIBAND)
{
//we know we have at least 2 layers...
redBandNameQString = getRasterBandName(1); // sensible default
greenBandNameQString = getRasterBandName(2); // sensible default
//for the third layer we cant be sure so..
if (gdalDataset->GetRasterCount() > 2)
{
blueBandNameQString = getRasterBandName(3); // sensible default
}
else
{
blueBandNameQString = tr("Not Set"); // sensible default
}
grayBandNameQString = tr("Not Set"); //sensible default
drawingStyle = MULTI_BAND_COLOR; //sensible default
}
else //GRAY_OR_UNDEFINED
{
getRasterBandStats(1);
redBandNameQString = tr("Not Set"); //sensible default
greenBandNameQString = tr("Not Set"); //sensible default
blueBandNameQString = tr("Not Set"); //sensible default
drawingStyle = SINGLE_BAND_GRAY; //sensible default
grayBandNameQString = getRasterBandName(1); // usually gdal will return gray or undefined
}
//mark the layer as valid
valid=TRUE;
return true;
} // QgsRasterLayer::readFile
QString QgsRasterLayer::getProjectionWKT()
{
QString myWKTString;
QgsSpatialRefSys mySRS;
myWKTString=QString (gdalDataset->GetProjectionRef());
mySRS.createFromWkt(myWKTString);
if (!mySRS.isValid())
{
//try to get the gcp srs from the raster layer if available
myWKTString=QString(gdalDataset->GetGCPProjection());
mySRS.createFromWkt(myWKTString);
if (!mySRS.isValid())
{
// set to default here?
QSettings settings;
int srsid = settings.readNumEntry("Projections/defaultProjectionSRSID", 4326);
mySRS.createFromId(srsid, QgsSpatialRefSys::QGIS_SRSID);
}
}
return myWKTString;
}
void QgsRasterLayer::closeDataset()
{
if ( !valid ) return;
valid = FALSE;
GDALClose(gdalDataset);
gdalDataset = 0;
hasPyramidsFlag=false;
mPyramidList.clear();
rasterStatsVector.clear();
}
bool QgsRasterLayer::update()
{
QgsDebugMsg("QgsRasterLayer::update");
if ( mLastModified < QgsRasterLayer::lastModified ( source() ) )
{
QgsDebugMsg("Outdated -> reload");
closeDataset();
return readFile ( source() );
}
return true;
}
QDateTime QgsRasterLayer::lastModified ( QString const & name )
{
QgsDebugMsg("QgsRasterLayer::lastModified: " + name);
QDateTime t;
QFileInfo fi ( name );
// Is it file?
if ( !fi.exists() ) return t;
t = fi.lastModified();
// Check also color table for GRASS
if ( name.contains( "cellhd" ) > 0 )
{ // most probably GRASS
QString dir = fi.dirPath();
QString map = fi.fileName();
fi.setFile ( dir + "/../colr/" + map );
if ( fi.exists() )
{
if ( fi.lastModified() > t ) t = fi.lastModified();
}
}
// Check GRASS group members (bands)
if ( name.contains( "group" ) > 0 )
{ // probably GRASS group
fi.setFile ( name + "/REF" );
if ( fi.exists() )
{ // most probably GRASS group
QFile f ( name + "/REF" );
if ( f.open ( QIODevice::ReadOnly ) )
{
QString dir = fi.dirPath() + "/../../../";
char buf[101];
while ( f.readLine(buf,100) != -1 )
{
QString ln = QString(buf);
QStringList sl = QStringList::split ( ' ', ln.stripWhiteSpace() );
QString map = sl.first();
sl.pop_front();
QString mapset = sl.first();
// header
fi.setFile ( dir + mapset + "/cellhd/" + map );
if ( fi.exists() )
{
if ( fi.lastModified() > t ) t = fi.lastModified();
}
// color
fi.setFile ( dir + mapset + "/colr/" + map );
if ( fi.exists() )
{
if ( fi.lastModified() > t ) t = fi.lastModified();
}
}
}
}
}
QgsDebugMsg("last modified = " + t.toString());
return t;
}
void QgsRasterLayer::showLayerProperties()
{
QgsDebugMsg("SHOWING RASTER LAYER PROPERTIES DIALOG");
qApp->setOverrideCursor(QCursor(Qt::WaitCursor));
if ( ! mLayerProperties )
{
mLayerProperties = new QgsRasterLayerProperties(this);
QgsDebugMsg("Creating new raster properties dialog instance");
}
mLayerProperties->sync();
mLayerProperties->raise();
mLayerProperties->show();
qApp->restoreOverrideCursor();
} // QgsRasterLayer::showLayerProperties()
// emit a signal asking for a repaint
void QgsRasterLayer::triggerRepaint()
{
emit repaintRequested();
}
QString QgsRasterLayer::getDrawingStyleAsQString()
{
switch (drawingStyle)
{
case SINGLE_BAND_GRAY:
return QString("SINGLE_BAND_GRAY"); //no need to tr() this its not shown in ui
break;
case SINGLE_BAND_PSEUDO_COLOR:
return QString("SINGLE_BAND_PSEUDO_COLOR");//no need to tr() this its not shown in ui
break;
case PALETTED_SINGLE_BAND_GRAY:
return QString("PALETTED_SINGLE_BAND_GRAY");//no need to tr() this its not shown in ui
break;
case PALETTED_SINGLE_BAND_PSEUDO_COLOR:
return QString("PALETTED_SINGLE_BAND_PSEUDO_COLOR");//no need to tr() this its not shown in ui
break;
case PALETTED_MULTI_BAND_COLOR:
return QString("PALETTED_MULTI_BAND_COLOR");//no need to tr() this its not shown in ui
break;
case MULTI_BAND_SINGLE_BAND_GRAY:
return QString("MULTI_BAND_SINGLE_BAND_GRAY");//no need to tr() this its not shown in ui
break;
case MULTI_BAND_SINGLE_BAND_PSEUDO_COLOR:
return QString("MULTI_BAND_SINGLE_BAND_PSEUDO_COLOR");//no need to tr() this its not shown in ui
break;
case MULTI_BAND_COLOR:
return QString("MULTI_BAND_COLOR");//no need to tr() this its not shown in ui
break;
default:
break;
}
return QString("INVALID_DRAWING_STYLE"); // XXX I hope this is ok to return
}
void QgsRasterLayer::setDrawingStyle(QString const & theDrawingStyleQString)
{
if (theDrawingStyleQString == "SINGLE_BAND_GRAY")//no need to tr() this its not shown in ui
{
drawingStyle = SINGLE_BAND_GRAY;
return;
}
if (theDrawingStyleQString == "SINGLE_BAND_PSEUDO_COLOR")//no need to tr() this its not shown in ui
{
drawingStyle = SINGLE_BAND_PSEUDO_COLOR;
return;
}
if (theDrawingStyleQString == "PALETTED_SINGLE_BAND_GRAY")//no need to tr() this its not shown in ui
{
drawingStyle = PALETTED_SINGLE_BAND_GRAY;
return;
}
if (theDrawingStyleQString == "PALETTED_SINGLE_BAND_PSEUDO_COLOR")//no need to tr() this its not shown in ui
{
drawingStyle = PALETTED_SINGLE_BAND_PSEUDO_COLOR;
return;
}
if (theDrawingStyleQString == "PALETTED_MULTI_BAND_COLOR")//no need to tr() this its not shown in ui
{
drawingStyle = PALETTED_MULTI_BAND_COLOR;
return;
}
if (theDrawingStyleQString == "MULTI_BAND_SINGLE_BAND_GRAY")//no need to tr() this its not shown in ui
{
drawingStyle = MULTI_BAND_SINGLE_BAND_GRAY;
return;
}
if (theDrawingStyleQString == "MULTI_BAND_SINGLE_BAND_PSEUDO_COLOR")//no need to tr() this its not shown in ui
{
drawingStyle = MULTI_BAND_SINGLE_BAND_PSEUDO_COLOR;
return;
}
if (theDrawingStyleQString == "MULTI_BAND_COLOR")//no need to tr() this its not shown in ui
{
drawingStyle = MULTI_BAND_COLOR;
return;
}
}
/** This method looks to see if a given band name exists.
@note
muliband layers may have more than one "Undefined" band!
*/
bool QgsRasterLayer::hasBand(QString const & theBandName)
{
QgsDebugMsg("Looking for band : " + theBandName);
for (int i = 1; i <= gdalDataset->GetRasterCount(); i++)
{
GDALRasterBand *myGdalBand = gdalDataset->GetRasterBand(i);
QString myColorQString = GDALGetColorInterpretationName(myGdalBand->GetColorInterpretation());
#ifdef QGISDEBUG
QgsLogger::debug("band", i, __FILE__, __FUNCTION__, __LINE__, 2);
#endif
if (myColorQString == theBandName)
{
#ifdef QGISDEBUG
QgsLogger::debug("band", i, __FILE__, __FUNCTION__, __LINE__, 2);
QgsDebugMsgLevel("Found band : " + theBandName, 2);
#endif
return true;
}
QgsDebugMsgLevel("Found unmatched band : " + QString::number(i) + " " + myColorQString, 2);
}
return false;
}
void QgsRasterLayer::drawThumbnail(QPixmap * theQPixmap)
{
theQPixmap->fill(); //defaults to white
// Raster providers are disabled (for the moment)
if (mProviderKey.isEmpty())
{
QgsRasterViewPort *myRasterViewPort = new QgsRasterViewPort();
myRasterViewPort->rectXOffsetInt = 0;
myRasterViewPort->rectYOffsetInt = 0;
myRasterViewPort->clippedXMinDouble = 0;
myRasterViewPort->clippedXMaxDouble = rasterXDimInt;
myRasterViewPort->clippedYMinDouble = rasterYDimInt;
myRasterViewPort->clippedYMaxDouble = 0;
myRasterViewPort->clippedWidthInt = rasterXDimInt;
myRasterViewPort->clippedHeightInt = rasterYDimInt;
myRasterViewPort->topLeftPoint = QgsPoint(0,0);
myRasterViewPort->bottomRightPoint = QgsPoint(theQPixmap->width(), theQPixmap->height());
myRasterViewPort->drawableAreaXDimInt = theQPixmap->width();
myRasterViewPort->drawableAreaYDimInt = theQPixmap->height();
QPainter * myQPainter=new QPainter(theQPixmap);
draw(myQPainter,myRasterViewPort);
delete myRasterViewPort;
myQPainter->end();
delete myQPainter;
}
}
QPixmap QgsRasterLayer::getPaletteAsPixmap()
{
QgsDebugMsg("QgsRasterLayer::getPaletteAsPixmap");
// Only do this for the non-provider (hard-coded GDAL) scenario...
// Maybe WMS can do this differently using QImage::numColors and QImage::color()
if (
(mProviderKey.isEmpty()) &&
(hasBand("Palette") ) //dont tr() this its a gdal word!
)
{
QgsDebugMsg("....found paletted image");
QgsColorTable *myColorTable = colorTable ( 1 );
GDALRasterBandH myGdalBand = gdalDataset->GetRasterBand(1);
if( GDALGetRasterColorInterpretation(myGdalBand) == GCI_PaletteIndex && myColorTable->defined() )
{
QgsDebugMsg("....found GCI_PaletteIndex");
double myMinDouble = myColorTable->rmin();
double myMaxDouble = myColorTable->rmax();
QgsDebugMsg("myMinDouble = " + QString::number(myMinDouble) + " myMaxDouble = " + QString::number(myMaxDouble));
// Draw image
int mySizeInt = 100;
QPixmap myPalettePixmap( mySizeInt, mySizeInt);
QPainter myQPainter(&myPalettePixmap);
QImage myQImage = QImage( mySizeInt, mySizeInt, 32);
myQImage.fill(0);