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33 lines
2.0 KiB
XML
33 lines
2.0 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="BackBufferCopy" inherits="Node2D" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
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<brief_description>
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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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</brief_description>
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<description>
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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 [member copy_mode]. It can be accessed in shader scripts using the screen texture (i.e. a uniform sampler with [code]hint_screen_texture[/code]).
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[b]Note:[/b] Since this node inherits from [Node2D] (and not [Control]), anchors and margins won't apply to child [Control]-derived nodes. This can be problematic when resizing the window. To avoid this, add [Control]-derived nodes as [i]siblings[/i] to the [BackBufferCopy] node instead of adding them as children.
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</description>
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<tutorials>
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<link title="Screen-reading shaders">$DOCS_URL/tutorials/shaders/screen-reading_shaders.html</link>
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</tutorials>
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<members>
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<member name="copy_mode" type="int" setter="set_copy_mode" getter="get_copy_mode" enum="BackBufferCopy.CopyMode" default="1">
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Buffer mode.
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</member>
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<member name="rect" type="Rect2" setter="set_rect" getter="get_rect" default="Rect2(-100, -100, 200, 200)">
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The area covered by the [BackBufferCopy]. Only used if [member copy_mode] is [constant COPY_MODE_RECT].
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</member>
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</members>
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<constants>
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<constant name="COPY_MODE_DISABLED" value="0" enum="CopyMode">
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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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</constant>
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<constant name="COPY_MODE_RECT" value="1" enum="CopyMode">
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[BackBufferCopy] buffers a rectangular region.
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</constant>
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<constant name="COPY_MODE_VIEWPORT" value="2" enum="CopyMode">
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[BackBufferCopy] buffers the entire screen.
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</constant>
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</constants>
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</class>
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