def _render_qwebpage_full(web_page, logger, viewport_size, image_size):
image = QImage(image_size, QImage.Format_ARGB32)
image.fill(0)
painter = QPainter(image)
try:
painter.setRenderHint(QPainter.Antialiasing, True)
painter.setRenderHint(QPainter.TextAntialiasing, True)
painter.setRenderHint(QPainter.SmoothPixmapTransform, True)
painter.setWindow(QRect(QPoint(0, 0), web_page.viewportSize()))
painter.setViewport(QRect(QPoint(0, 0), viewport_size))
if image_size != viewport_size:
# Try not to draw stuff that won't fit into the image. Clipping
# must be specified in input (aka logical) coordinates, but we know
# it in output (aka physical) coordinates, so we have to do an
# inverse transformation. If, for some reason, we cannot, skip the
# clipping altogether.
clip_rect = QRect(QPoint(0, 0), viewport_size)
inv_transform, invertible = painter.combinedTransform().inverted()
if invertible:
painter.setClipRect(inv_transform.mapRect(clip_rect))
web_page.mainFrame().render(painter)
finally:
# It is important to end painter explicitly in python code, because
# Python finalizer invocation order, unlike C++ destructors, is not
# deterministic and there is a possibility of image's finalizer running
# before painter's which may break tests and kill your cat.
painter.end()
return qimage_to_pil_image(image)
