:right-sidebar: True

GLShaderNode
===================================================================

.. currentmodule:: gi.repository.Gsk





.. class:: GLShaderNode(*args, **kwargs)
   :no-contents-entry:


Superclasses: :class:`~gi.repository.Gsk.RenderNode`





A render node using a GL shader when drawing its children nodes.


Constructors
------------

.. rst-class:: interim-class

.. class:: GLShaderNode
   :no-index:


   .. classmethod:: new(shader: ~gi.repository.Gsk.GLShader, bounds: ~gi.repository.Graphene.Rect, args: ~gi.repository.GLib.Bytes, children: list[~gi.repository.Gsk.RenderNode] | None = None) -> ~gi.repository.Gsk.GLShaderNode

      Creates a ``GskRenderNode`` that will render the given ``shader`` into the
      area given by ``bounds``\.

      The ``args`` is a block of data to use for uniform input, as per types and
      offsets defined by the ``shader``\. Normally this is generated by
      :obj:`~gi.repository.Gsk.GLShader.format_args` or :obj:`~gi.repository.Gsk.ShaderArgsBuilder`\.

      See :obj:`~gi.repository.Gsk.GLShader` for details about how the shader should be written.

      All the children will be rendered into textures (if they aren't already
      ``GskTextureNodes``\, which will be used directly). These textures will be
      sent as input to the shader.

      If the renderer doesn't support GL shaders, or if there is any problem
      when compiling the shader, then the node will draw pink. You should use
      :obj:`~gi.repository.Gsk.GLShader.compile` to ensure the ``shader`` will work for the
      renderer before using it.





      .. deprecated:: 4.16

         GTK's new Vulkan-focused rendering
           does not support this feature. Use `GtkGLArea <../gtk4/class.GLArea.html>`__
           for OpenGL rendering.



      :param shader: the ``GskGLShader``

      :param bounds: the rectangle to render the shader into

      :param args: Arguments for the uniforms

      :param children: array of child nodes,
           these will be rendered to textures and used as input.








Methods
-------

.. rst-class:: interim-class

.. class:: GLShaderNode
   :no-index:


   .. method:: get_args() -> ~gi.repository.GLib.Bytes

      Gets args for the node.





      .. deprecated:: 4.16

         GTK's new Vulkan-focused rendering
           does not support this feature. Use `GtkGLArea <../gtk4/class.GLArea.html>`__
           for OpenGL rendering.






   .. method:: get_child(idx: int) -> ~gi.repository.Gsk.RenderNode

      Gets one of the children.





      .. deprecated:: 4.16

         GTK's new Vulkan-focused rendering
           does not support this feature. Use `GtkGLArea <../gtk4/class.GLArea.html>`__
           for OpenGL rendering.



      :param idx: the position of the child to get




   .. method:: get_n_children() -> int

      Returns the number of children





      .. deprecated:: 4.16

         GTK's new Vulkan-focused rendering
           does not support this feature. Use `GtkGLArea <../gtk4/class.GLArea.html>`__
           for OpenGL rendering.






   .. method:: get_shader() -> ~gi.repository.Gsk.GLShader

      Gets shader code for the node.