godot/doc/classes/SubViewportContainer.xml
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<?xml version="1.0" encoding="UTF-8" ?>
<class name="SubViewportContainer" inherits="Container" version="4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
<brief_description>
Control for holding [SubViewport]s.
</brief_description>
<description>
A [Container] node that holds a [SubViewport], automatically setting its size.
[b]Note:[/b] Changing a SubViewportContainer's [member Control.rect_scale] will cause its contents to appear distorted. To change its visual size without causing distortion, adjust the node's margins instead (if it's not already in a container).
</description>
<tutorials>
</tutorials>
<members>
<member name="stretch" type="bool" setter="set_stretch" getter="is_stretch_enabled" default="false">
If [code]true[/code], the sub-viewport will be scaled to the control's size.
</member>
<member name="stretch_shrink" type="int" setter="set_stretch_shrink" getter="get_stretch_shrink" default="1">
Divides the sub-viewport's effective resolution by this value while preserving its scale. This can be used to speed up rendering.
For example, a 1280×720 sub-viewport with [member stretch_shrink] set to [code]2[/code] will be rendered at 640×360 while occupying the same size in the container.
[b]Note:[/b] [member stretch] must be [code]true[/code] for this property to work.
</member>
</members>
</class>