<?xml version="1.0" encoding="UTF-8" ?>
<class name="EditorResourcePreviewGenerator" inherits="RefCounted" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
<brief_description>
Custom generator of previews.
</brief_description>
<description>
Custom code to generate previews. Please check [code]file_dialog/thumbnail_size[/code] in [EditorSettings] to find out the right size to do previews at.
</description>
<tutorials>
</tutorials>
<methods>
<method name="_can_generate_small_preview" qualifiers="virtual const">
<return type="bool" />
<description>
If this function returns [code]true[/code], the generator will call [method _generate] or [method _generate_from_path] for small previews as well.
By default, it returns [code]false[/code].
</description>
</method>
<method name="_generate" qualifiers="virtual const">
<return type="Texture2D" />
<param index="0" name="resource" type="Resource" />
<param index="1" name="size" type="Vector2i" />
<param index="2" name="metadata" type="Dictionary" />
<description>
Generate a preview from a given resource with the specified size. This must always be implemented.
Returning [code]null[/code] is an OK way to fail and let another generator take care.
Care must be taken because this function is always called from a thread (not the main thread).
[param metadata] dictionary can be modified to store file-specific metadata that can be used in [method EditorResourceTooltipPlugin._make_tooltip_for_path] (like image size, sample length etc.).
</description>
</method>
<method name="_generate_from_path" qualifiers="virtual const">
<return type="Texture2D" />
<param index="0" name="path" type="String" />
<param index="1" name="size" type="Vector2i" />
<param index="2" name="metadata" type="Dictionary" />
<description>
Generate a preview directly from a path with the specified size. Implementing this is optional, as default code will load and call [method _generate].
Returning [code]null[/code] is an OK way to fail and let another generator take care.
Care must be taken because this function is always called from a thread (not the main thread).
[param metadata] dictionary can be modified to store file-specific metadata that can be used in [method EditorResourceTooltipPlugin._make_tooltip_for_path] (like image size, sample length etc.).
</description>
</method>
<method name="_generate_small_preview_automatically" qualifiers="virtual const">
<return type="bool" />
<description>
If this function returns [code]true[/code], the generator will automatically generate the small previews from the normal preview texture generated by the methods [method _generate] or [method _generate_from_path].
By default, it returns [code]false[/code].
</description>
</method>
<method name="_handles" qualifiers="virtual const">
<return type="bool" />
<param index="0" name="type" type="String" />
<description>
Returns [code]true[/code] if your generator supports the resource of type [param type].
</description>
</method>
</methods>
</class>
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