Add test for rendering of adjacent tile images

qgis · Jan 7, 2016 · 886fd72 · 886fd72
1 parent 15a8bc9
commit 886fd72
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diff --git a/src/core/qgsvectorlayerrenderer.h b/src/core/qgsvectorlayerrenderer.h
@@ -50,7 +50,7 @@ class QgsVectorLayerDiagramProvider;
  * @note added in 2.4
  * @note not available in Python bindings
  */
-class QgsVectorLayerRenderer : public QgsMapLayerRenderer
+class CORE_EXPORT QgsVectorLayerRenderer : public QgsMapLayerRenderer
 {
   public:
     QgsVectorLayerRenderer( QgsVectorLayer* layer, QgsRenderContext& context );

diff --git a/tests/src/core/CMakeLists.txt b/tests/src/core/CMakeLists.txt
@@ -177,5 +177,6 @@ ADD_QGIS_TEST(vectorlayercachetest testqgsvectorlayercache.cpp )
 ADD_QGIS_TEST(vectorlayerjoinbuffer testqgsvectorlayerjoinbuffer.cpp )
 ADD_QGIS_TEST(vectorlayertest testqgsvectorlayer.cpp)
 ADD_QGIS_TEST(ziplayertest testziplayer.cpp)
+ADD_QGIS_TEST(adjacenttiles testqgsadjacenttiles.cpp)
 
 ADD_DEPENDENCIES(qgis_coordinatereferencesystemtest synccrsdb)
diff --git a/tests/src/core/testqgsadjacenttiles.cpp b/tests/src/core/testqgsadjacenttiles.cpp
@@ -0,0 +1,171 @@
+/***************************************************************************
+     testadjacenttiles.cpp
+     --------------------------------------
+    Date                 : Jan 7  2016
+    Copyright            : (C) 2016 by Marco Hugentobler
+    Email                : marco at sourcepole dot ch
+ ***************************************************************************
+ *                                                                         *
+ *   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/QtTest>
+#include <QObject>
+
+#include "qgsapplication.h"
+#include "qgsmaplayerregistry.h"
+#include <qgsrenderchecker.h>
+#include "qgsvectorlayer.h"
+#include "qgsvectorlayerrenderer.h"
+
+/** \ingroup UnitTests
+ * This unit test checks if rendering of adjacent tiles (e.g. to render images for tile caches)
+ * does not result in border effects
+ */
+class TestQgsAdjacentTiles : public QObject
+{
+    Q_OBJECT
+  public:
+    TestQgsAdjacentTiles() {}
+    ~TestQgsAdjacentTiles() {}
+
+  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 testFourAdjacentTiles_data();
+    void testFourAdjacentTiles();
+};
+
+void TestQgsAdjacentTiles::initTestCase()
+{
+  QgsApplication::init();
+  QgsApplication::initQgis();
+}
+
+void TestQgsAdjacentTiles::cleanupTestCase()
+{
+  QgsApplication::exitQgis();
+}
+
+void TestQgsAdjacentTiles::testFourAdjacentTiles_data()
+{
+  QTest::addColumn<QStringList>( "bboxList" );
+  QTest::addColumn<QString>( "resultFile" );
+  QTest::addColumn<QString>( "shapeFile" );
+  QTest::addColumn<QString>( "qmlFile" );
+
+  QString shapeFile = TEST_DATA_DIR + QString( "/france_parts.shp" );
+  QString qmlFile = TEST_DATA_DIR + QString( "/adjacent_tiles/line_pattern_30_degree.qml" );
+  QString resultFile = TEST_DATA_DIR + QString( "/adjacent_tiles/testFourAdjacentTiles1_expected.png" );
+
+  QStringList bboxList1;
+  bboxList1 << "-1.5,48,-0.5,49";
+  bboxList1 << "-0.5,48,0.5,49";
+  bboxList1 << "-1.5,47,-0.5,48";
+  bboxList1 << "-0.5,47,0.5,48";
+
+  QTest::newRow( "testFourAdjacentTiles1" ) << bboxList1 << resultFile << shapeFile << qmlFile;
+
+  qmlFile = TEST_DATA_DIR + QString( "/adjacent_tiles/point_pattern_simple_marker.qml" );
+  resultFile = TEST_DATA_DIR + QString( "/adjacent_tiles/testFourAdjacentTiles2_expected.png" );
+
+  QTest::newRow( "testFourAdjacentTiles2" ) << bboxList1 << resultFile << shapeFile << qmlFile;
+
+  shapeFile = TEST_DATA_DIR + QString( "/lines.shp" );
+  qmlFile = TEST_DATA_DIR + QString( "/adjacent_tiles/simple_line_dashed.qml" );
+  resultFile = TEST_DATA_DIR + QString( "/adjacent_tiles/testFourAdjacentTiles3_expected.png" );
+
+  QStringList bboxList2;
+  bboxList2 << "-105,35,-95,45";
+  bboxList2 << "-95,35,-85,45";
+  bboxList2 << "-105,25,-95,35";
+  bboxList2 << "-95,25,-85,35";
+
+  QTest::newRow( "testFourAdjacentTiles3" ) << bboxList2 << resultFile << shapeFile << qmlFile;
+}
+
+void TestQgsAdjacentTiles::testFourAdjacentTiles()
+{
+  QFETCH( QStringList, bboxList );
+  QFETCH( QString, resultFile );
+  QFETCH( QString, shapeFile );
+  QFETCH( QString, qmlFile );
+
+  QVERIFY( bboxList.size() == 4 );
+
+  //create maplayer, set QML and add to maplayer registry
+  QgsVectorLayer* vectorLayer = new QgsVectorLayer( shapeFile, "testshape", "ogr" );
+
+  //todo: read QML
+  QFile symbologyFile( qmlFile );
+  if ( !symbologyFile.open( QIODevice::ReadOnly ) )
+  {
+    QFAIL( "Open symbology file failed" );
+  }
+
+  QDomDocument qmlDoc;
+  if ( !qmlDoc.setContent( &symbologyFile ) )
+  {
+    QFAIL( "QML file not valid" );
+  }
+
+  QString errorMsg;
+  if ( !vectorLayer->readSymbology( qmlDoc.documentElement(), errorMsg ) )
+  {
+    QFAIL( errorMsg.toLocal8Bit().data() );
+  }
+
+  QImage globalImage( 512, 512, QImage::Format_ARGB32_Premultiplied );
+  globalImage.fill( Qt::white );
+  QPainter globalPainter( &globalImage );
+
+  for ( int i = 0; i < 4; ++i )
+  {
+    QImage img( 256, 256, QImage::Format_ARGB32_Premultiplied );
+    img.fill( Qt::white );
+    QPainter p( &img );
+
+    QgsRenderContext renderContext;
+    renderContext.setPainter( &p );
+    renderContext.setFlag( QgsRenderContext::RenderMapTile, true );
+
+    //extent
+    QStringList rectCoords = bboxList.at( i ).split( "," );
+    if ( rectCoords.size() != 4 )
+    {
+      QFAIL( "bbox string invalid" );
+    }
+    QgsRectangle rect( rectCoords[0].toDouble(), rectCoords[1].toDouble(), rectCoords[2].toDouble(), rectCoords[3].toDouble() );
+    renderContext.setExtent( rect );
+
+    //maptopixel
+    QgsMapToPixel mapToPixel( rect.width() / 256.0, rect.center().x(), rect.center().y(), 256, 256, 0 );
+    renderContext.setMapToPixel( mapToPixel );
+
+    QgsVectorLayerRenderer renderer( vectorLayer, renderContext );
+    if ( !renderer.render() )
+    {
+      QFAIL( "Rendering failed" );
+    }
+
+    int globalImageX = ( i % 2 ) * 256;
+    int globalImageY = ( i < 2 ) ? 0 : 256;
+    globalPainter.drawImage( globalImageX, globalImageY, img );
+  }
+
+  delete vectorLayer;
+
+  QString renderedImagePath = QDir::tempPath() + "/" + QTest::currentDataTag() + QString( ".png" );
+  globalImage.save( renderedImagePath );
+
+  QgsRenderChecker checker;
+  checker.setControlName( QTest::currentDataTag() );
+  QVERIFY( checker.compareImages( QTest::currentDataTag(), 0, renderedImagePath ) );
+}
+
+QTEST_MAIN( TestQgsAdjacentTiles )
+#include "testqgsadjacenttiles.moc"