.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "_gallery/feature_demo/physical_color.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download__gallery_feature_demo_physical_color.py>`
        to download the full example code.

.. rst-class:: sphx-glr-example-title

.. _sphx_glr__gallery_feature_demo_physical_color.py:


Physical Color
==============

Pygfx by default assumes that all colors are in the sRGB colorspace.
This example shows how you can also provide colors in physical colorspace
(a.k.a. linear-srgb). This example shows 3 images:
* A normal image in sRGB.
* An image in physical colorspace, shows up too dark.
* An image in physical colorspace, rendered correctly.

.. GENERATED FROM PYTHON SOURCE LINES 13-67



.. image-sg:: /_gallery/feature_demo/images/sphx_glr_physical_color_001.webp
   :alt: physical color
   :srcset: /_gallery/feature_demo/images/sphx_glr_physical_color_001.webp
   :class: sphx-glr-single-img





.. code-block:: Python



    import imageio.v3 as iio
    from rendercanvas.auto import RenderCanvas, loop
    import pygfx as gfx
    import numpy as np

    canvas = RenderCanvas()
    renderer = gfx.renderers.WgpuRenderer(canvas)
    scene = gfx.Scene()


    def read_srgb_color_image():
        return iio.imread("imageio:astronaut.png").astype(np.float32) / 255


    def read_physical_color_image():
        # We fake it by reading a simple srgb image and gamma decoding it
        return read_srgb_color_image() ** 2.2


    im1 = read_srgb_color_image()
    im2 = read_physical_color_image()

    material = gfx.ImageBasicMaterial(clim=(0, 1))

    image1 = gfx.Image(
        gfx.Geometry(grid=gfx.Texture(im1, dim=2)),
        material,
    )
    image1.local.x = 0

    image2 = gfx.Image(
        gfx.Geometry(grid=gfx.Texture(im2, dim=2)),
        material,
    )
    image2.local.x = 550

    image3 = gfx.Image(
        gfx.Geometry(grid=gfx.Texture(im2, dim=2, colorspace="physical")),
        material,
    )
    image3.local.x = 1100

    scene.add(image1, image2, image3)

    camera = gfx.OrthographicCamera(1650, 550)
    camera.local.position = (805, 256, 0)
    camera.local.scale_y = -1


    if __name__ == "__main__":
        canvas.request_draw(lambda: renderer.render(scene, camera))
        loop.run()


.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 0.374 seconds)


.. _sphx_glr_download__gallery_feature_demo_physical_color.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: physical_color.ipynb <physical_color.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: physical_color.py <physical_color.py>`

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: physical_color.zip <physical_color.zip>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_

.. only:: html

    Interactive example
    -------------------

    Try this example in your browser using Pyodide. Might not work with all examples and all devices. Check the output and your browser's console for details.

    .. raw:: html

        <iframe src="./../pyodide.html#physical_color.py"></iframe>