def testSetCacheImageDifferentParams(self):
"""
Test setting cache image with different parameters
"""
cache = QgsMapRendererCache()
cache.updateParameters(QgsRectangle(1, 1, 3, 3), QgsMapToPixel(5))
im = QImage(200, 200, QImage.Format_RGB32)
cache.setCacheImage('im1', im, [])
self.assertEqual(cache.cacheImage('im1').width(), 200)
# if existing cached image exists with matching parameters, we don't store a new image -- old
# one should still be retained
im = QImage(201, 201, QImage.Format_RGB32)
cache.setCacheImageWithParameters('im1', im, QgsRectangle(1, 1, 3, 4), QgsMapToPixel(5), [])
self.assertEqual(cache.cacheImage('im1').width(), 200)
cache.setCacheImageWithParameters('im1', im, QgsRectangle(1, 1, 3, 3), QgsMapToPixel(6), [])
self.assertEqual(cache.cacheImage('im1').width(), 200)
# replace with matching parameters
cache.setCacheImageWithParameters('im1', im, QgsRectangle(1, 1, 3, 3), QgsMapToPixel(5), [])
self.assertEqual(cache.cacheImage('im1').width(), 201)
im = QImage(202, 202, QImage.Format_RGB32)
cache.setCacheImage('im1', im, [])
self.assertEqual(cache.cacheImage('im1').width(), 202)
def createTemporaryRenderContext():
layerModel = iface.layerTreeView().layerTreeModel()
mupp, dpi, scale = layerModel.legendMapViewData()
if qgsDoubleNear(mupp, 0.0) or dpi == 0 or qgsDoubleNear(scale, 0.0):
return None
render_context = QgsRenderContext()
render_context.setScaleFactor(dpi / 25.4)
render_context.setRendererScale(scale)
render_context.setMapToPixel(QgsMapToPixel(mupp))
return render_context
def qgis_render_context(painter, width, height):
mtp = QgsMapToPixel()
# the default viewport if centered on 0, 0
mtp.setParameters( 1, # map units per pixel
width/2, # map center in geographical units
height/2, # map center in geographical units
width, # output width in pixels
height, # output height in pixels
0.0 # rotation in degrees
)
context = QgsRenderContext()
context.setMapToPixel(mtp)
context.setPainter(painter)
return context
def testPainterClipPath(self):
region = QgsMapClippingRegion(QgsGeometry.fromWkt('Polygon((0 0, 1 0, 1 1, 0 1, 0 0))'))
region.setFeatureClip(QgsMapClippingRegion.FeatureClippingType.ClipPainterOnly)
region2 = QgsMapClippingRegion(QgsGeometry.fromWkt('Polygon((0 0, 0.1 0, 0.1 2, 0 2, 0 0))'))
region2.setFeatureClip(QgsMapClippingRegion.FeatureClippingType.NoClipping)
region3 = QgsMapClippingRegion(QgsGeometry.fromWkt('Polygon((0 0, 0.1 0, 0.1 2, 0 2, 0 0))'))
region3.setFeatureClip(QgsMapClippingRegion.FeatureClippingType.ClipPainterOnly)
rc = QgsRenderContext()
for t in [QgsMapLayerType.VectorLayer, QgsMapLayerType.RasterLayer, QgsMapLayerType.MeshLayer, QgsMapLayerType.VectorTileLayer]:
path, should_clip = QgsMapClippingUtils.calculatePainterClipRegion([], rc, t)
self.assertFalse(should_clip)
self.assertEqual(path.elementCount(), 0)
for t in [QgsMapLayerType.VectorLayer, QgsMapLayerType.RasterLayer, QgsMapLayerType.MeshLayer, QgsMapLayerType.VectorTileLayer]:
path, should_clip = QgsMapClippingUtils.calculatePainterClipRegion([region], rc, t)
self.assertTrue(should_clip)
self.assertEqual(QgsGeometry.fromQPolygonF(path.toFillPolygon()).asWkt(1), 'Polygon ((0 1, 1 1, 1 0, 0 0, 0 1))')
# region2 is a Intersects type clipping region, should not apply for vector layers
path, should_clip = QgsMapClippingUtils.calculatePainterClipRegion([region2], rc, QgsMapLayerType.VectorLayer)
self.assertFalse(should_clip)
self.assertEqual(path.elementCount(), 0)
for t in [QgsMapLayerType.RasterLayer, QgsMapLayerType.MeshLayer, QgsMapLayerType.VectorTileLayer]:
path, should_clip = QgsMapClippingUtils.calculatePainterClipRegion([region2], rc, t)
self.assertTrue(should_clip)
self.assertEqual(QgsGeometry.fromQPolygonF(path.toFillPolygon()).asWkt(1), 'Polygon ((0 1, 0.1 1, 0.1 -1, 0 -1, 0 1))')
for t in [QgsMapLayerType.VectorLayer, QgsMapLayerType.RasterLayer, QgsMapLayerType.MeshLayer, QgsMapLayerType.VectorTileLayer]:
path, should_clip = QgsMapClippingUtils.calculatePainterClipRegion([region, region2, region3], rc, t)
self.assertTrue(should_clip)
geom = QgsGeometry.fromQPolygonF(path.toFillPolygon())
geom.normalize()
self.assertEqual(geom.asWkt(1), 'Polygon ((0 0, 0 1, 0.1 1, 0.1 0, 0 0))')
rc.setMapToPixel(QgsMapToPixel(5, 10, 11, 200, 150, 0))
for t in [QgsMapLayerType.VectorLayer, QgsMapLayerType.RasterLayer, QgsMapLayerType.MeshLayer, QgsMapLayerType.VectorTileLayer]:
path, should_clip = QgsMapClippingUtils.calculatePainterClipRegion([region, region3], rc, t)
self.assertTrue(should_clip)
self.assertEqual(QgsGeometry.fromQPolygonF(path.toFillPolygon()).asWkt(0), 'Polygon ((98 77, 98 77, 98 77, 98 77, 98 77))')
