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134 lines
5.4 KiB
ReStructuredText
134 lines
5.4 KiB
ReStructuredText
:github_url: hide
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.. DO NOT EDIT THIS FILE!!!
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.. Generated automatically from Godot engine sources.
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.. Generator: https://github.com/godotengine/godot/tree/master/doc/tools/make_rst.py.
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.. XML source: https://github.com/godotengine/godot/tree/master/doc/classes/BackBufferCopy.xml.
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.. _class_BackBufferCopy:
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BackBufferCopy
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==============
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**Inherits:** :ref:`Node2D<class_Node2D>` **<** :ref:`CanvasItem<class_CanvasItem>` **<** :ref:`Node<class_Node>` **<** :ref:`Object<class_Object>`
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A node that copies a region of the screen to a buffer for access in shader code.
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.. rst-class:: classref-introduction-group
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Description
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-----------
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Node for back-buffering the currently-displayed screen. The region defined in the **BackBufferCopy** node is buffered with the content of the screen it covers, or the entire screen according to the :ref:`copy_mode<class_BackBufferCopy_property_copy_mode>`. It can be accessed in shader scripts using the screen texture (i.e. a uniform sampler with ``hint_screen_texture``).
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\ **Note:** Since this node inherits from :ref:`Node2D<class_Node2D>` (and not :ref:`Control<class_Control>`), anchors and margins won't apply to child :ref:`Control<class_Control>`-derived nodes. This can be problematic when resizing the window. To avoid this, add :ref:`Control<class_Control>`-derived nodes as *siblings* to the **BackBufferCopy** node instead of adding them as children.
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.. rst-class:: classref-introduction-group
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Tutorials
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---------
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- :doc:`Screen-reading shaders <../tutorials/shaders/screen-reading_shaders>`
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.. rst-class:: classref-reftable-group
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Properties
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----------
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.. table::
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:widths: auto
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+-----------------------------------------------+-----------------------------------------------------------+---------------------------------+
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| :ref:`CopyMode<enum_BackBufferCopy_CopyMode>` | :ref:`copy_mode<class_BackBufferCopy_property_copy_mode>` | ``1`` |
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+-----------------------------------------------+-----------------------------------------------------------+---------------------------------+
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| :ref:`Rect2<class_Rect2>` | :ref:`rect<class_BackBufferCopy_property_rect>` | ``Rect2(-100, -100, 200, 200)`` |
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+-----------------------------------------------+-----------------------------------------------------------+---------------------------------+
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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Enumerations
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------------
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.. _enum_BackBufferCopy_CopyMode:
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.. rst-class:: classref-enumeration
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enum **CopyMode**: :ref:`🔗<enum_BackBufferCopy_CopyMode>`
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.. _class_BackBufferCopy_constant_COPY_MODE_DISABLED:
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.. rst-class:: classref-enumeration-constant
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:ref:`CopyMode<enum_BackBufferCopy_CopyMode>` **COPY_MODE_DISABLED** = ``0``
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Disables the buffering mode. This means the **BackBufferCopy** node will directly use the portion of screen it covers.
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.. _class_BackBufferCopy_constant_COPY_MODE_RECT:
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.. rst-class:: classref-enumeration-constant
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:ref:`CopyMode<enum_BackBufferCopy_CopyMode>` **COPY_MODE_RECT** = ``1``
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**BackBufferCopy** buffers a rectangular region.
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.. _class_BackBufferCopy_constant_COPY_MODE_VIEWPORT:
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.. rst-class:: classref-enumeration-constant
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:ref:`CopyMode<enum_BackBufferCopy_CopyMode>` **COPY_MODE_VIEWPORT** = ``2``
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**BackBufferCopy** buffers the entire screen.
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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Property Descriptions
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---------------------
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.. _class_BackBufferCopy_property_copy_mode:
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.. rst-class:: classref-property
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:ref:`CopyMode<enum_BackBufferCopy_CopyMode>` **copy_mode** = ``1`` :ref:`🔗<class_BackBufferCopy_property_copy_mode>`
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.. rst-class:: classref-property-setget
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- |void| **set_copy_mode**\ (\ value\: :ref:`CopyMode<enum_BackBufferCopy_CopyMode>`\ )
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- :ref:`CopyMode<enum_BackBufferCopy_CopyMode>` **get_copy_mode**\ (\ )
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Buffer mode.
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.. rst-class:: classref-item-separator
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----
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.. _class_BackBufferCopy_property_rect:
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.. rst-class:: classref-property
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:ref:`Rect2<class_Rect2>` **rect** = ``Rect2(-100, -100, 200, 200)`` :ref:`🔗<class_BackBufferCopy_property_rect>`
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.. rst-class:: classref-property-setget
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- |void| **set_rect**\ (\ value\: :ref:`Rect2<class_Rect2>`\ )
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- :ref:`Rect2<class_Rect2>` **get_rect**\ (\ )
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The area covered by the **BackBufferCopy**. Only used if :ref:`copy_mode<class_BackBufferCopy_property_copy_mode>` is :ref:`COPY_MODE_RECT<class_BackBufferCopy_constant_COPY_MODE_RECT>`.
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.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
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.. |required| replace:: :abbr:`required (This method is required to be overridden when extending its base class.)`
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.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
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.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`
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.. |constructor| replace:: :abbr:`constructor (This method is used to construct a type.)`
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.. |static| replace:: :abbr:`static (This method doesn't need an instance to be called, so it can be called directly using the class name.)`
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.. |operator| replace:: :abbr:`operator (This method describes a valid operator to use with this type as left-hand operand.)`
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.. |bitfield| replace:: :abbr:`BitField (This value is an integer composed as a bitmask of the following flags.)`
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.. |void| replace:: :abbr:`void (No return value.)`
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