def testRenderRegionToImage(self):
l = QgsLayout(QgsProject.instance())
l.initializeDefaults()
# add some items
item1 = QgsLayoutItemShape(l)
item1.attemptSetSceneRect(QRectF(10, 20, 100, 150))
fill = QgsSimpleFillSymbolLayer()
fill_symbol = QgsFillSymbol()
fill_symbol.changeSymbolLayer(0, fill)
fill.setColor(Qt.green)
fill.setStrokeStyle(Qt.NoPen)
item1.setSymbol(fill_symbol)
l.addItem(item1)
exporter = QgsLayoutExporter(l)
size = QSize(560, 509)
image = exporter.renderRegionToImage(QRectF(5, 10, 110, 100), size)
self.assertFalse(image.isNull())
rendered_file_path = os.path.join(self.basetestpath,
'test_rendertoimageregionsize.png')
image.save(rendered_file_path, "PNG")
self.assertTrue(
self.checkImage('rendertoimageregionsize',
'rendertoimageregionsize', rendered_file_path))
# using layout dpi
l.context().setDpi(40)
image = exporter.renderRegionToImage(QRectF(5, 10, 110, 100))
self.assertFalse(image.isNull())
rendered_file_path = os.path.join(self.basetestpath,
'test_rendertoimageregiondpi.png')
image.save(rendered_file_path, "PNG")
self.assertTrue(
self.checkImage('rendertoimageregiondpi', 'rendertoimageregiondpi',
rendered_file_path))
# overriding dpi
image = exporter.renderRegionToImage(QRectF(5, 10, 110, 100), QSize(),
80)
self.assertFalse(image.isNull())
rendered_file_path = os.path.join(
self.basetestpath, 'test_rendertoimageregionoverridedpi.png')
image.save(rendered_file_path, "PNG")
self.assertTrue(
self.checkImage('rendertoimageregionoverridedpi',
'rendertoimageregionoverridedpi',
rendered_file_path))
