/**
* Test that point features are rendered at the expected image coordinates when the map is
* rotated. StreamingRenderer
*
* @throws Exception
*/
@Test
public void testRotatedTransform() throws Exception {
// If we rotate the world rectangle + 90 degrees around (0,0), we get the screen rectangle
final Rectangle screen = new Rectangle(0, 0, 100, 50);
final Envelope world = new Envelope(0, 50, 0, -100);
final AffineTransform worldToScreen =
AffineTransform.getRotateInstance(Math.toRadians(90), 0, 0);
DefaultFeatureCollection fc = new DefaultFeatureCollection();
fc.add(createPoint(0, 0));
fc.add(createPoint(world.getMaxX(), world.getMinY()));
MapContext mapContext = new DefaultMapContext(DefaultGeographicCRS.WGS84);
mapContext.addLayer((FeatureCollection) fc, createPointStyle());
BufferedImage image =
new BufferedImage(screen.width, screen.height, BufferedImage.TYPE_4BYTE_ABGR);
final StreamingRenderer sr = new StreamingRenderer();
sr.setContext(mapContext);
sr.paint(image.createGraphics(), screen, worldToScreen);
assertTrue("Pixel should be drawn at 0,0 ", image.getRGB(0, 0) != 0);
assertTrue(
"Pixel should not be drawn in image centre ",
image.getRGB(screen.width / 2, screen.height / 2) == 0);
assertTrue(
"Pixel should be drawn at image max corner ",
image.getRGB(screen.width - 1, screen.height - 1) != 0);
}
@Test
public void testRenderStuff() throws Exception {
// build map context
MapContext mapContext = new DefaultMapContext(DefaultGeographicCRS.WGS84);
mapContext.addLayer(createLineCollection(), createLineStyle());
// build projected envelope to work with (small one around the area of
// validity of utm zone 1, which being a Gauss projection is a vertical
// slice parallel to the central meridian, -177°)
ReferencedEnvelope reWgs =
new ReferencedEnvelope(new Envelope(-180, -170, 20, 40), DefaultGeographicCRS.WGS84);
CoordinateReferenceSystem utm1N = CRS.decode("EPSG:32601");
System.out.println(CRS.getGeographicBoundingBox(utm1N));
ReferencedEnvelope reUtm = reWgs.transform(utm1N, true);
BufferedImage image = new BufferedImage(200, 200, BufferedImage.TYPE_4BYTE_ABGR);
// setup the renderer and listen for errors
StreamingRenderer sr = new StreamingRenderer();
sr.setContext(mapContext);
sr.addRenderListener(
new RenderListener() {
public void featureRenderer(SimpleFeature feature) {
features++;
}
public void errorOccurred(Exception e) {
errors++;
}
});
errors = 0;
features = 0;
sr.paint((Graphics2D) image.getGraphics(), new Rectangle(200, 200), reUtm);
// we should get two errors since there are two features that cannot be
// projected but the renderer itself should not throw exceptions
assertTrue(features > 0);
}
@Test
public void testInfiniteLoopAvoidance() throws Exception {
final Exception sentinel =
new RuntimeException("This is the one that should be thrown in hasNext()");
// setup the mock necessary to have the renderer hit into the exception in hasNext()
SimpleFeatureIterator it2 = createNiceMock(SimpleFeatureIterator.class);
expect(it2.hasNext()).andThrow(sentinel).anyTimes();
replay(it2);
SimpleFeatureCollection fc = createNiceMock(SimpleFeatureCollection.class);
expect(fc.features()).andReturn(it2);
expect(fc.size()).andReturn(200);
expect(fc.getSchema()).andReturn(testFeatureType).anyTimes();
replay(fc);
SimpleFeatureSource fs = createNiceMock(SimpleFeatureSource.class);
expect(fs.getFeatures((Query) anyObject())).andReturn(fc);
expect(fs.getSchema()).andReturn(testFeatureType).anyTimes();
expect(fs.getSupportedHints()).andReturn(new HashSet()).anyTimes();
replay(fs);
// build map context
MapContext mapContext = new DefaultMapContext(DefaultGeographicCRS.WGS84);
mapContext.addLayer(fs, createLineStyle());
// setup the renderer and listen for errors
final StreamingRenderer sr = new StreamingRenderer();
sr.setContext(mapContext);
sr.addRenderListener(
new RenderListener() {
public void featureRenderer(SimpleFeature feature) {
features++;
}
public void errorOccurred(Exception e) {
errors++;
if (errors > 2) {
// we dont' want to block the loop in case of regression on this bug
sr.stopRendering();
}
// but we want to make sure we're getting
Throwable t = e;
while (t != sentinel && t.getCause() != null) t = t.getCause();
assertSame(sentinel, t);
}
});
errors = 0;
features = 0;
BufferedImage image = new BufferedImage(200, 200, BufferedImage.TYPE_4BYTE_ABGR);
ReferencedEnvelope reWgs =
new ReferencedEnvelope(new Envelope(-180, -170, 20, 40), DefaultGeographicCRS.WGS84);
sr.paint((Graphics2D) image.getGraphics(), new Rectangle(200, 200), reWgs);
// we should get two errors since there are two features that cannot be
// projected but the renderer itself should not throw exceptions
assertEquals(0, features);
assertEquals(1, errors);
}
