def __init__(self, methodName): """Run once on class initialization.""" unittest.TestCase.__init__(self, methodName) self.iface = get_iface() # initialize class MapRegistry, Canvas, MapRenderer, Map and PAL self.mMapRegistry = QgsProject.instance() # create point layer myShpFile = os.path.join(TEST_DATA_DIR, 'points.shp') self.mPointLayer = QgsVectorLayer(myShpFile, 'Points', 'ogr') self.mMapRegistry.addMapLayer(self.mPointLayer) self.mSimplifyMethod = QgsVectorSimplifyMethod() self.mSimplifyMethod.setSimplifyHints( QgsVectorSimplifyMethod.NoSimplification) # create polygon layer myShpFile = os.path.join(TEST_DATA_DIR, 'polys.shp') self.mPolygonLayer = QgsVectorLayer(myShpFile, 'Polygons', 'ogr') self.mPolygonLayer.setSimplifyMethod(self.mSimplifyMethod) self.mMapRegistry.addMapLayer(self.mPolygonLayer) # create line layer myShpFile = os.path.join(TEST_DATA_DIR, 'lines.shp') self.mLineLayer = QgsVectorLayer(myShpFile, 'Lines', 'ogr') self.mLineLayer.setSimplifyMethod(self.mSimplifyMethod) self.mMapRegistry.addMapLayer(self.mLineLayer) # create two raster layers myRasterFile = os.path.join(TEST_DATA_DIR, 'rgb256x256.png') self.mRasterLayer1 = QgsRasterLayer(myRasterFile, "raster1") self.mRasterLayer2 = QgsRasterLayer(myRasterFile, "raster2") myMultiBandRenderer1 = QgsMultiBandColorRenderer( self.mRasterLayer1.dataProvider(), 1, 2, 3) self.mRasterLayer1.setRenderer(myMultiBandRenderer1) self.mMapRegistry.addMapLayer(self.mRasterLayer1) myMultiBandRenderer2 = QgsMultiBandColorRenderer( self.mRasterLayer2.dataProvider(), 1, 2, 3) self.mRasterLayer2.setRenderer(myMultiBandRenderer2) self.mMapRegistry.addMapLayer(self.mRasterLayer2) # to match blend modes test comparisons background self.mapSettings = QgsMapSettings() self.mapSettings.setLayers([self.mRasterLayer1, self.mRasterLayer2]) self.mapSettings.setBackgroundColor(QColor(152, 219, 249)) self.mapSettings.setOutputSize(QSize(400, 400)) self.mapSettings.setOutputDpi(96) self.extent = QgsRectangle(-118.8888888888887720, 22.8002070393376783, -83.3333333333331581, 46.8719806763287536)
def __init__(self, methodName): """Run once on class initialisation.""" unittest.TestCase.__init__(self, methodName) # initialize class MapRegistry, Canvas, MapRenderer, Map and PAL self.mMapRegistry = QgsMapLayerRegistry.instance() # create point layer myShpFile = os.path.join(TEST_DATA_DIR, 'points.shp') self.mPointLayer = QgsVectorLayer(myShpFile, 'Points', 'ogr') self.mMapRegistry.addMapLayer(self.mPointLayer) self.mSimplifyMethod = QgsVectorSimplifyMethod() self.mSimplifyMethod.setSimplifyHints( QgsVectorSimplifyMethod.NoSimplification) # create polygon layer myShpFile = os.path.join(TEST_DATA_DIR, 'polys.shp') self.mPolygonLayer = QgsVectorLayer(myShpFile, 'Polygons', 'ogr') self.mPolygonLayer.setSimplifyMethod(self.mSimplifyMethod) self.mMapRegistry.addMapLayer(self.mPolygonLayer) # create line layer myShpFile = os.path.join(TEST_DATA_DIR, 'lines.shp') self.mLineLayer = QgsVectorLayer(myShpFile, 'Lines', 'ogr') self.mLineLayer.setSimplifyMethod(self.mSimplifyMethod) self.mMapRegistry.addMapLayer(self.mLineLayer) # create two raster layers myRasterFile = os.path.join(TEST_DATA_DIR, 'landsat.tif') self.mRasterLayer1 = QgsRasterLayer(myRasterFile, "raster1") self.mRasterLayer2 = QgsRasterLayer(myRasterFile, "raster2") myMultiBandRenderer1 = QgsMultiBandColorRenderer( self.mRasterLayer1.dataProvider(), 2, 3, 4) self.mRasterLayer1.setRenderer(myMultiBandRenderer1) self.mMapRegistry.addMapLayer(self.mRasterLayer1) myMultiBandRenderer2 = QgsMultiBandColorRenderer( self.mRasterLayer2.dataProvider(), 2, 3, 4) self.mRasterLayer2.setRenderer(myMultiBandRenderer2) self.mMapRegistry.addMapLayer(self.mRasterLayer2) # to match blend modes test comparisons background self.mCanvas = CANVAS self.mCanvas.setCanvasColor(QColor(152, 219, 249)) self.mMap = self.mCanvas.map() self.mMap.resize(QSize(400, 400)) self.mMapRenderer = self.mCanvas.mapRenderer() self.mMapRenderer.setOutputSize(QSize(400, 400), 72)
def __init__(self, methodName): """Run once on class initialization.""" unittest.TestCase.__init__(self, methodName) myPath = os.path.join(TEST_DATA_DIR, 'rgb256x256.png') rasterFileInfo = QFileInfo(myPath) self.raster_layer = QgsRasterLayer(rasterFileInfo.filePath(), rasterFileInfo.completeBaseName()) rasterRenderer = QgsMultiBandColorRenderer( self.raster_layer.dataProvider(), 1, 2, 3) self.raster_layer.setRenderer(rasterRenderer) myPath = os.path.join(TEST_DATA_DIR, 'points.shp') vector_file_info = QFileInfo(myPath) self.vector_layer = QgsVectorLayer(vector_file_info.filePath(), vector_file_info.completeBaseName(), 'ogr') assert self.vector_layer.isValid() # pipe = mRasterLayer.pipe() # assert pipe.set(rasterRenderer), 'Cannot set pipe renderer' QgsProject.instance().addMapLayers( [self.raster_layer, self.vector_layer]) # create layout with layout map self.layout = QgsLayout(QgsProject.instance()) self.layout.initializeDefaults() self.map = QgsLayoutItemMap(self.layout) self.map.attemptSetSceneRect(QRectF(20, 20, 200, 100)) self.map.setFrameEnabled(True) self.map.setLayers([self.raster_layer]) self.layout.addLayoutItem(self.map)
def __init__(self, methodName): """Run once on class initialization.""" unittest.TestCase.__init__(self, methodName) myPath = os.path.join(TEST_DATA_DIR, 'rgb256x256.png') rasterFileInfo = QFileInfo(myPath) self.raster_layer = QgsRasterLayer(rasterFileInfo.filePath(), rasterFileInfo.completeBaseName()) rasterRenderer = QgsMultiBandColorRenderer( self.raster_layer.dataProvider(), 1, 2, 3) self.raster_layer.setRenderer(rasterRenderer) myPath = os.path.join(TEST_DATA_DIR, 'points.shp') vector_file_info = QFileInfo(myPath) self.vector_layer = QgsVectorLayer(vector_file_info.filePath(), vector_file_info.completeBaseName(), 'ogr') assert self.vector_layer.isValid() # pipe = mRasterLayer.pipe() # assert pipe.set(rasterRenderer), 'Cannot set pipe renderer' QgsProject.instance().addMapLayers( [self.raster_layer, self.vector_layer]) # create composition with composer map self.mComposition = QgsComposition(QgsProject.instance()) self.mComposition.setPaperSize(297, 210) self.mComposerMap = QgsComposerMap(self.mComposition, 20, 20, 200, 100) self.mComposerMap.setFrameEnabled(True) self.mComposerMap.setLayers([self.raster_layer]) self.mComposition.addComposerMap(self.mComposerMap)
def setLayerRGB(layer, r, g, b): renderer = QgsMultiBandColorRenderer(layer.dataProvider(), r + 1, g + 1, b + 1) layer.setRenderer(renderer) layer.setDefaultContrastEnhancement() layer.triggerRepaint() iface.legendInterface().refreshLayerSymbology(layer)
def testStretchingAlgorithm(self): rasterRenderer = QgsMultiBandColorRenderer( self.raster_layer.dataProvider(), 3, 1, 2) self.raster_layer.setRenderer(rasterRenderer) # check StretchToMinimumMaximum stretching alg self.raster_layer.setContrastEnhancement(algorithm=QgsContrastEnhancement.StretchToMinimumMaximum, limits=QgsRasterMinMaxOrigin.MinMax) dom, root = self.rendererToSld(self.raster_layer.renderer()) self.assertContrastEnhancement(root, 'sld:RedChannel', 'StretchToMinimumMaximum', '51', '172') self.assertContrastEnhancement(root, 'sld:GreenChannel', 'StretchToMinimumMaximum', '122', '130') self.assertContrastEnhancement(root, 'sld:BlueChannel', 'StretchToMinimumMaximum', '133', '148') # check StretchAndClipToMinimumMaximum stretching alg self.raster_layer.setContrastEnhancement(algorithm=QgsContrastEnhancement.StretchAndClipToMinimumMaximum, limits=QgsRasterMinMaxOrigin.MinMax) dom, root = self.rendererToSld(self.raster_layer.renderer()) self.assertContrastEnhancement(root, 'sld:RedChannel', 'ClipToZero', '51', '172') self.assertContrastEnhancement(root, 'sld:GreenChannel', 'ClipToZero', '122', '130') self.assertContrastEnhancement(root, 'sld:BlueChannel', 'ClipToZero', '133', '148') # check ClipToMinimumMaximum stretching alg self.raster_layer.setContrastEnhancement(algorithm=QgsContrastEnhancement.ClipToMinimumMaximum, limits=QgsRasterMinMaxOrigin.MinMax) dom, root = self.rendererToSld(self.raster_layer.renderer()) self.assertContrastEnhancement(root, 'sld:RedChannel', 'ClipToMinimumMaximum', '51', '172') self.assertContrastEnhancement(root, 'sld:GreenChannel', 'ClipToMinimumMaximum', '122', '130') self.assertContrastEnhancement(root, 'sld:BlueChannel', 'ClipToMinimumMaximum', '133', '148') # check NoEnhancement stretching alg self.raster_layer.setContrastEnhancement(algorithm=QgsContrastEnhancement.NoEnhancement) dom, root = self.rendererToSld(self.raster_layer.renderer()) self.assertContrastEnhancement(root, 'sld:RedChannel') self.assertContrastEnhancement(root, 'sld:GreenChannel') self.assertContrastEnhancement(root, 'sld:BlueChannel')
def __init__(self, methodName): """Run once on class initialisation.""" unittest.TestCase.__init__(self, methodName) myPath = os.path.join(TEST_DATA_DIR, 'landsat.tif') rasterFileInfo = QFileInfo(myPath) mRasterLayer = QgsRasterLayer(rasterFileInfo.filePath(), rasterFileInfo.completeBaseName()) rasterRenderer = QgsMultiBandColorRenderer(mRasterLayer.dataProvider(), 2, 3, 4) mRasterLayer.setRenderer(rasterRenderer) #pipe = mRasterLayer.pipe() #assert pipe.set(rasterRenderer), 'Cannot set pipe renderer' QgsMapLayerRegistry.instance().addMapLayers([mRasterLayer]) # create composition with composer map self.mMapRenderer = QgsMapRenderer() layerStringList = [] layerStringList.append(mRasterLayer.id()) self.mMapRenderer.setLayerSet(layerStringList) self.mMapRenderer.setProjectionsEnabled(False) self.mComposition = QgsComposition(self.mMapRenderer) self.mComposition.setPaperSize(297, 210) self.mComposerMap = QgsComposerMap(self.mComposition, 20, 20, 200, 100) self.mComposerMap.setFrameEnabled(True) self.mComposition.addComposerMap(self.mComposerMap)
def testPrintMapFromTemplate(self): """Test that we can get a map to render in the template.""" myPath = os.path.join(TEST_DATA_DIR, 'landsat.tif') myFileInfo = QFileInfo(myPath) myRasterLayer = QgsRasterLayer(myFileInfo.filePath(), myFileInfo.completeBaseName()) myRenderer = QgsMultiBandColorRenderer( myRasterLayer.dataProvider(), 2, 3, 4 ) #mRasterLayer.setRenderer( rasterRenderer ) myPipe = myRasterLayer.pipe() assert myPipe.set( myRenderer ), "Cannot set pipe renderer" QgsMapLayerRegistry.instance().addMapLayers([myRasterLayer]) myMapRenderer = QgsMapRenderer() myLayerStringList = [] myLayerStringList.append(myRasterLayer.id()) myMapRenderer.setLayerSet(myLayerStringList) myMapRenderer.setProjectionsEnabled(False) myComposition = QgsComposition(myMapRenderer) myFile = os.path.join(TEST_DATA_DIR, 'template-for-substitution.qpt') myTemplateFile = file(myFile, 'rt') myTemplateContent = myTemplateFile.read() myTemplateFile.close() myDocument = QDomDocument() myDocument.setContent(myTemplateContent) myComposition.loadFromTemplate(myDocument) # now render the map, first zooming to the raster extents myMap = myComposition.getComposerMapById(0) myMessage = ('Map 0 could not be found in template %s', myFile) assert myMap is not None, myMessage myExtent = myRasterLayer.extent() myMap.setNewExtent(myExtent) myImagePath = os.path.join(str(QDir.tempPath()), 'template_map_render_python.png') myPageNumber = 0 myImage = myComposition.printPageAsRaster(myPageNumber) myImage.save(myImagePath) assert os.path.exists(myImagePath), 'Map render was not created.' # Not sure if this is a predictable way to test but its quicker than # rendering. myFileSize = QFileInfo(myImagePath).size() myExpectedFileSize = 100000 myMessage = ('Expected file size to be greater than %s, got %s' ' for %s' % (myExpectedFileSize, myFileSize, myImagePath)) assert myFileSize > myExpectedFileSize, myMessage
def testMultiBandColorRenderer(self): rasterRenderer = QgsMultiBandColorRenderer( self.raster_layer.dataProvider(), 3, 1, 2) self.raster_layer.setRenderer(rasterRenderer) self.raster_layer.setContrastEnhancement(algorithm=QgsContrastEnhancement.StretchToMinimumMaximum, limits=QgsRasterMinMaxOrigin.MinMax) dom, root = self.rendererToSld(self.raster_layer.renderer()) self.assertNoOpacity(root) self.assertChannelBand(root, 'sld:RedChannel', '3') self.assertChannelBand(root, 'sld:GreenChannel', '1') self.assertChannelBand(root, 'sld:BlueChannel', '2')
def __init__(self, methodName): """Run once on class initialization.""" unittest.TestCase.__init__(self, methodName) myPath = os.path.join(TEST_DATA_DIR, 'rgb256x256.png') rasterFileInfo = QFileInfo(myPath) mRasterLayer = QgsRasterLayer(rasterFileInfo.filePath(), rasterFileInfo.completeBaseName()) rasterRenderer = QgsMultiBandColorRenderer(mRasterLayer.dataProvider(), 1, 2, 3) mRasterLayer.setRenderer(rasterRenderer) #pipe = mRasterLayer.pipe() #assert pipe.set(rasterRenderer), 'Cannot set pipe renderer' QgsMapLayerRegistry.instance().addMapLayers([mRasterLayer]) # create composition with composer map self.mMapSettings = QgsMapSettings() self.mMapSettings.setLayers([mRasterLayer.id()]) self.mMapSettings.setCrsTransformEnabled(False) self.mComposition = QgsComposition(self.mMapSettings) self.mComposition.setPaperSize(297, 210) self.mComposerMap = QgsComposerMap(self.mComposition, 20, 20, 200, 100) self.mComposerMap.setFrameEnabled(True) self.mComposition.addComposerMap(self.mComposerMap)