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107 lines
4.1 KiB
C++
107 lines
4.1 KiB
C++
/***************************************************************************
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testcontrastenhancements.cpp
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--------------------------------------
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Date : Frida Nov 23 2007
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Copyright : (C) 2007 by Tim Sutton
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Email : tim@linfiniti.com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgstest.h"
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#include <QObject>
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#include <QApplication>
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#include <QDesktopServices>
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//qgis includes...
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#include <qgsrasterlayer.h>
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#include <qgscliptominmaxenhancement.h>
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#include <qgscontrastenhancement.h>
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#include <qgslinearminmaxenhancement.h>
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#include <qgslinearminmaxenhancementwithclip.h>
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/** \ingroup UnitTests
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* This is a unit test for the ContrastEnhancements contrast enhancement classes.
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*/
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class TestContrastEnhancements: public QObject
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{
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Q_OBJECT
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private slots:
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void initTestCase();// will be called before the first testfunction is executed.
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void cleanupTestCase();// will be called after the last testfunction was executed.
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void init() {} // will be called before each testfunction is executed.
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void cleanup() {} // will be called after every testfunction.
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void clipMinMaxEnhancementTest();
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void linearMinMaxEnhancementWithClipTest();
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void linearMinMaxEnhancementTest();
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private:
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QString mReport;
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};
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//runs before all tests
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void TestContrastEnhancements::initTestCase()
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{
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mReport += QLatin1String( "<h1>Raster Contrast Enhancement Tests</h1>\n" );
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}
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//runs after all tests
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void TestContrastEnhancements::cleanupTestCase()
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{
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QString myReportFile = QDir::tempPath() + "/qgistest.html";
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QFile myFile( myReportFile );
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if ( myFile.open( QIODevice::WriteOnly | QIODevice::Append ) )
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{
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QTextStream myQTextStream( &myFile );
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myQTextStream << mReport;
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myFile.close();
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//QDesktopServices::openUrl( "file:///" + myReportFile );
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}
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}
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void TestContrastEnhancements::clipMinMaxEnhancementTest()
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{
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//Clips 0 < x < 10, 240 < X < 256
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//Stretch no stretch is applied
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QgsClipToMinMaxEnhancement myEnhancement( Qgis::Byte, 10.0, 240.0 );
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// Original pixel value 0.0 Should be out of range thus clipped
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QVERIFY( !myEnhancement.isValueInDisplayableRange( 0.0 ) );
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//Original pixel value of 10.0 should be scaled to 10.0
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QVERIFY( 10.0 == myEnhancement.enhance( 10.0 ) );
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//Original pixel value of 240 should be scaled to 240
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QVERIFY( 240.0 == myEnhancement.enhance( 240.0 ) );
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}
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void TestContrastEnhancements::linearMinMaxEnhancementWithClipTest()
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{
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//First clips 0 < x < 10, 240 < X < 256
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//Then stretch 10 = 0, 240 = 255 linearly distribute values 10 -> 240 between 0 -> 255
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QgsLinearMinMaxEnhancementWithClip myEnhancement( Qgis::Byte, 10.0, 240.0 );
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// Original pixel value 0.0 Should be out of range thus clipped
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QVERIFY( !myEnhancement.isValueInDisplayableRange( 0.0 ) );
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//Original pixel value of 10.0 should be scaled to 0.0
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QVERIFY( 0.0 == myEnhancement.enhance( 10.0 ) );
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//Original pixel value of 240 should be scaled to 255
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QVERIFY( 255.0 == myEnhancement.enhance( 240.0 ) );
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}
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void TestContrastEnhancements::linearMinMaxEnhancementTest()
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{
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//Stretch 10 = 0, 240 = 255 linearly distribute values 10 -> 240 between 0 -> 255
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QgsLinearMinMaxEnhancement myEnhancement( Qgis::Byte, 10.0, 240.0 );
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//0 should be scaled to 10 and not clipped
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QVERIFY( myEnhancement.isValueInDisplayableRange( 0.0 ) );
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//Original pixel value of 10.0 should be scaled to 0.0
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QVERIFY( 0.0 == myEnhancement.enhance( 10.0 ) );
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//Original pixel value of 240 should be scaled to 255
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QVERIFY( 255.0 == myEnhancement.enhance( 240.0 ) );
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}
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QGSTEST_MAIN( TestContrastEnhancements )
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#include "testcontrastenhancements.moc"
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