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.. py:currentmodule:: moderngl
Standalone rendering
====================
Standalone (offline) rendering allows you to render without using a window, and is included in ModernGL by default.
Rendering occurs when :py:meth:`VertexArray.render` is called. By default, the ``mode`` parameter is :py:attr:`moderngl.TRIANGLES`, but since we need to draw a line, we change the mode value to :py:attr:`moderngl.LINES`::
vao.render(moderngl.LINES) # "mode" is the first optional argument
To display the rendering result, we use the `Pillow (PIL)`_ library that comes with Python. Let's return the texture from the GPU memory to RAM and call the ``PIL.Image.show()`` method to show it.
.. rubric:: Entire source
.. literalinclude:: first.4.py
:emphasize-lines: 4,46-
:linenos:
The result will be something like this:
.. figure:: rendering_result.png
:alt: Rendering result
:align: center
:figclass: align-center
Rendering result
.. _Pillow (PIL): https://pillow.readthedocs.io/
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