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nyalldawsonnyalldawson
committedMay 1, 2013
Add tests for layer blending
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ltr-3_40archive/master_2
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‎tests/src/core/CMakeLists.txt

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@@ -91,6 +91,7 @@ ADD_QGIS_TEST(contrastenhancementtest testcontrastenhancements.cpp)
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ADD_QGIS_TEST(maplayertest testqgsmaplayer.cpp)
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ADD_QGIS_TEST(rendererstest testqgsrenderers.cpp)
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ADD_QGIS_TEST(maprenderertest testqgsmaprenderer.cpp)
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ADD_QGIS_TEST(blendmodestest testqgsblendmodes.cpp)
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ADD_QGIS_TEST(geometrytest testqgsgeometry.cpp)
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ADD_QGIS_TEST(coordinatereferencesystemtest testqgscoordinatereferencesystem.cpp)
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ADD_DEPENDENCIES(qgis_coordinatereferencesystemtest synccrsdb)

‎tests/src/core/testqgsblendmodes.cpp

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/***************************************************************************
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testqgsblendmodes.cpp
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--------------------------------------
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Date : May 2013
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Copyright : (C) 2013 by Nyall Dawson, Tim Sutton
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Email : nyall dot dawson at gmail.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 <QtTest>
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#include <QObject>
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#include <QString>
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#include <QStringList>
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#include <QApplication>
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#include <QDir>
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#include <QPainter>
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//qgis includes...
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#include <qgsmaprenderer.h>
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#include <qgsmaplayer.h>
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#include <qgsvectorlayer.h>
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#include <qgsapplication.h>
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#include <qgsproviderregistry.h>
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#include <qgsmaplayerregistry.h>
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#include <qgsmultibandcolorrenderer.h>
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#include <qgsrasterlayer.h>
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//qgis test includes
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#include "qgsrenderchecker.h"
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/** \ingroup UnitTests
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* This is a unit test for layer blend modes
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*/
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class TestQgsBlendModes: 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 vectorBlending();
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void rasterBlending();
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private:
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bool imageCheck( QString theType ); //as above
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QgsMapRenderer * mpMapRenderer;
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QgsMapLayer * mpPointsLayer;
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QgsMapLayer * mpPolysLayer;
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QgsRasterLayer* mRasterLayer1;
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QgsRasterLayer* mRasterLayer2;
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QString mTestDataDir;
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};
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void TestQgsBlendModes::initTestCase()
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{
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// init QGIS's paths - true means that all path will be inited from prefix
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QgsApplication::init();
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QgsApplication::initQgis();
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QgsApplication::showSettings();
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//create some objects that will be used in tests
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//create a point layer
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QString myDataDir( TEST_DATA_DIR ); //defined in CmakeLists.txt
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mTestDataDir = myDataDir + QDir::separator();
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QString myPointsFileName = mTestDataDir + "points.shp";
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QFileInfo myPointFileInfo( myPointsFileName );
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mpPointsLayer = new QgsVectorLayer( myPointFileInfo.filePath(),
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myPointFileInfo.completeBaseName(), "ogr" );
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QgsMapLayerRegistry::instance()->addMapLayers(
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QList<QgsMapLayer *>() << mpPointsLayer );
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//create a poly layer that will be used in tests
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QString myPolysFileName = mTestDataDir + "polys.shp";
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QFileInfo myPolyFileInfo( myPolysFileName );
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mpPolysLayer = new QgsVectorLayer( myPolyFileInfo.filePath(),
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myPolyFileInfo.completeBaseName(), "ogr" );
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QgsMapLayerRegistry::instance()->addMapLayers(
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QList<QgsMapLayer *>() << mpPolysLayer );
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//create two raster layers
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QFileInfo rasterFileInfo( mTestDataDir + "landsat.tif" );
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mRasterLayer1 = new QgsRasterLayer( rasterFileInfo.filePath(),
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rasterFileInfo.completeBaseName() );
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mRasterLayer2 = new QgsRasterLayer( rasterFileInfo.filePath(),
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rasterFileInfo.completeBaseName() );
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QgsMultiBandColorRenderer* rasterRenderer = new QgsMultiBandColorRenderer( mRasterLayer1->dataProvider(), 2, 3, 4 );
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mRasterLayer1->setRenderer( rasterRenderer );
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mRasterLayer2->setRenderer( rasterRenderer );
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QgsMapLayerRegistry::instance()->addMapLayers(
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QList<QgsMapLayer *>() << mRasterLayer1 );
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QgsMapLayerRegistry::instance()->addMapLayers(
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QList<QgsMapLayer *>() << mRasterLayer2);
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mpMapRenderer = new QgsMapRenderer();
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}
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void TestQgsBlendModes::cleanupTestCase()
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{
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}
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void TestQgsBlendModes::vectorBlending()
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{
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//Add two vector layers
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QStringList myLayers;
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myLayers << mpPointsLayer->id();
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myLayers << mpPolysLayer->id();
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mpMapRenderer->setLayerSet( myLayers );
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//Set blending modes for both layers
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mpPointsLayer->setBlendMode( QPainter::CompositionMode_Overlay );
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mpPolysLayer->setBlendMode( QPainter::CompositionMode_Multiply );
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mpMapRenderer->setExtent( mpPointsLayer->extent() );
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QVERIFY( imageCheck( "vector_blendmodes" ) );
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}
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void TestQgsBlendModes::rasterBlending()
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{
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//Add two raster layers to map renderer
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QStringList myLayers;
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myLayers << mRasterLayer1->id();
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myLayers << mRasterLayer2->id();
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mpMapRenderer->setLayerSet( myLayers );
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mpMapRenderer->setExtent( mRasterLayer1->extent() );
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// set blending mode for top layer
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mRasterLayer1->setBlendMode( QPainter::CompositionMode_Plus );
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QVERIFY( imageCheck( "raster_blendmodes" ) );
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}
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//
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// Private helper functions not called directly by CTest
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//
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bool TestQgsBlendModes::imageCheck( QString theTestType )
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{
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//use the QgsRenderChecker test utility class to
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//ensure the rendered output matches our control image
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QgsRenderChecker myChecker;
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myChecker.setControlName( "expected_" + theTestType );
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myChecker.setMapRenderer( mpMapRenderer );
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bool myResultFlag = myChecker.runTest( theTestType );
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return myResultFlag;
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}
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QTEST_MAIN( TestQgsBlendModes )
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#include "moc_testqgsblendmodes.cxx"

‎tests/testdata/control_images/expected_raster_blendmodes/expected_raster_blendmodes.png

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‎tests/testdata/control_images/expected_vector_blendmodes/expected_vector_blendmodes.png

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