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testqgsblendmodes.cpp
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testqgsblendmodes.cpp
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/***************************************************************************
testqgsblendmodes.cpp
--------------------------------------
Date : May 2013
Copyright : (C) 2013 by Nyall Dawson, Tim Sutton
Email : nyall dot dawson at gmail.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. *
* *
***************************************************************************/
#include <QtTest>
#include <QObject>
#include <QString>
#include <QStringList>
#include <QApplication>
#include <QDir>
#include <QPainter>
//qgis includes...
#include <qgsmaprenderer.h>
#include <qgsmaplayer.h>
#include <qgsvectorlayer.h>
#include <qgsapplication.h>
#include <qgsproviderregistry.h>
#include <qgsmaplayerregistry.h>
#include <qgsmultibandcolorrenderer.h>
#include <qgsrasterlayer.h>
//qgis test includes
#include "qgsrenderchecker.h"
/** \ingroup UnitTests
* This is a unit test for layer blend modes
*/
class TestQgsBlendModes: public QObject
{
Q_OBJECT;
private slots:
void initTestCase();// will be called before the first testfunction is executed.
void cleanupTestCase();// will be called after the last testfunction was executed.
void init() {};// will be called before each testfunction is executed.
void cleanup() {};// will be called after every testfunction.
void vectorBlending();
void featureBlending();
void vectorLayerTransparency();
void rasterBlending();
private:
bool imageCheck( QString theType ); //as above
QgsMapRenderer * mpMapRenderer;
QgsMapLayer * mpPointsLayer;
QgsMapLayer * mpPolysLayer;
QgsVectorLayer * mpLinesLayer;
QgsRasterLayer* mRasterLayer1;
QgsRasterLayer* mRasterLayer2;
QString mTestDataDir;
};
void TestQgsBlendModes::initTestCase()
{
// init QGIS's paths - true means that all path will be inited from prefix
QgsApplication::init();
QgsApplication::initQgis();
QgsApplication::showSettings();
//create some objects that will be used in tests
//create a point layer
QString myDataDir( TEST_DATA_DIR ); //defined in CmakeLists.txt
mTestDataDir = myDataDir + QDir::separator();
QString myPointsFileName = mTestDataDir + "points.shp";
QFileInfo myPointFileInfo( myPointsFileName );
mpPointsLayer = new QgsVectorLayer( myPointFileInfo.filePath(),
myPointFileInfo.completeBaseName(), "ogr" );
QgsMapLayerRegistry::instance()->addMapLayers(
QList<QgsMapLayer *>() << mpPointsLayer );
//create a poly layer that will be used in tests
QString myPolysFileName = mTestDataDir + "polys.shp";
QFileInfo myPolyFileInfo( myPolysFileName );
mpPolysLayer = new QgsVectorLayer( myPolyFileInfo.filePath(),
myPolyFileInfo.completeBaseName(), "ogr" );
QgsMapLayerRegistry::instance()->addMapLayers(
QList<QgsMapLayer *>() << mpPolysLayer );
//create a line layer that will be used in tests
QString myLinesFileName = mTestDataDir + "lines.shp";
QFileInfo myLineFileInfo( myLinesFileName );
mpLinesLayer = new QgsVectorLayer( myLineFileInfo.filePath(),
myLineFileInfo.completeBaseName(), "ogr" );
QgsMapLayerRegistry::instance()->addMapLayers(
QList<QgsMapLayer *>() << mpLinesLayer );
//create two raster layers
QFileInfo rasterFileInfo( mTestDataDir + "landsat.tif" );
mRasterLayer1 = new QgsRasterLayer( rasterFileInfo.filePath(),
rasterFileInfo.completeBaseName() );
mRasterLayer2 = new QgsRasterLayer( rasterFileInfo.filePath(),
rasterFileInfo.completeBaseName() );
QgsMultiBandColorRenderer* rasterRenderer = new QgsMultiBandColorRenderer( mRasterLayer1->dataProvider(), 2, 3, 4 );
mRasterLayer1->setRenderer( rasterRenderer );
mRasterLayer2->setRenderer( rasterRenderer );
QgsMapLayerRegistry::instance()->addMapLayers(
QList<QgsMapLayer *>() << mRasterLayer1 );
QgsMapLayerRegistry::instance()->addMapLayers(
QList<QgsMapLayer *>() << mRasterLayer2 );
mpMapRenderer = new QgsMapRenderer();
}
void TestQgsBlendModes::cleanupTestCase()
{
}
void TestQgsBlendModes::vectorBlending()
{
//Add two vector layers
QStringList myLayers;
myLayers << mpLinesLayer->id();
myLayers << mpPolysLayer->id();
mpMapRenderer->setLayerSet( myLayers );
//Set blending modes for both layers
mpLinesLayer->setBlendMode( QPainter::CompositionMode_Difference );
mpPolysLayer->setBlendMode( QPainter::CompositionMode_Difference );
mpMapRenderer->setExtent( mpPointsLayer->extent() );
QVERIFY( imageCheck( "vector_blendmodes" ) );
//Reset layers
mpLinesLayer->setBlendMode( QPainter::CompositionMode_SourceOver );
mpPolysLayer->setBlendMode( QPainter::CompositionMode_SourceOver );
}
void TestQgsBlendModes::featureBlending()
{
//Add two vector layers
QStringList myLayers;
myLayers << mpLinesLayer->id();
myLayers << mpPolysLayer->id();
mpMapRenderer->setLayerSet( myLayers );
//Set feature blending modes for point layer
mpLinesLayer->setFeatureBlendMode( QPainter::CompositionMode_Plus );
mpMapRenderer->setExtent( mpPointsLayer->extent() );
QVERIFY( imageCheck( "vector_featureblendmodes" ) );
//Reset layers
mpLinesLayer->setFeatureBlendMode( QPainter::CompositionMode_SourceOver );
}
void TestQgsBlendModes::vectorLayerTransparency()
{
//Add two vector layers
QStringList myLayers;
myLayers << mpLinesLayer->id();
myLayers << mpPolysLayer->id();
mpMapRenderer->setLayerSet( myLayers );
//Set feature blending modes for point layer
mpLinesLayer->setLayerTransparency( 50 );
mpMapRenderer->setExtent( mpPointsLayer->extent() );
QVERIFY( imageCheck( "vector_layertransparency" ) );
//Reset layers
mpLinesLayer->setLayerTransparency( 0 );
}
void TestQgsBlendModes::rasterBlending()
{
//Add two raster layers to map renderer
QStringList myLayers;
myLayers << mRasterLayer1->id();
myLayers << mRasterLayer2->id();
mpMapRenderer->setLayerSet( myLayers );
mpMapRenderer->setExtent( mRasterLayer1->extent() );
// set blending mode for top layer
mRasterLayer1->setBlendMode( QPainter::CompositionMode_Plus );
QVERIFY( imageCheck( "raster_blendmodes" ) );
}
//
// Private helper functions not called directly by CTest
//
bool TestQgsBlendModes::imageCheck( QString theTestType )
{
//use the QgsRenderChecker test utility class to
//ensure the rendered output matches our control image
QgsRenderChecker myChecker;
myChecker.setControlName( "expected_" + theTestType );
myChecker.setMapRenderer( mpMapRenderer );
bool myResultFlag = myChecker.runTest( theTestType );
return myResultFlag;
}
QTEST_MAIN( TestQgsBlendModes )
#include "moc_testqgsblendmodes.cxx"