Asset Catalog Format Reference: Image Stack Layer Type

A layer in an image stack.

There are two types of image stack layers. Embedded layers are the default and contain the image set for the layer. Referenced layers contain a reference to an image set in the asset catalog.

Extension

.imagestacklayer

Folder Contents

An image set for the layer for embedded types.

A Contents.json for referenced types.

Contents.json File

Optional for embedded image stack layers and contains metadata (Table 20-1).

Required for referenced image and contains the location of the referenced image stack inside the asset catalog.

**Table 20-1**Image stack layer tags
Key	Type	Description
`info`	Dictionary	Metadata for the author and format version of the asset catalog.
`author`	String	Use your bundle ID.
`version`	Number	The format version of the asset catalog. Use `1`.
`properties`	Dictionary	Properties for an image stack layer.
`content-reference`	Dictionary	The location of the referenced image set for the image stack layer.
`type`	String	The type of asset pointed to by the reference. Must be `image-set`.
`name`	String	The fully qualified name of the image set. For more information, see Unique Asset Names.
`matching-style`	String	The kind of content reference. Must be `fully-qualified-name`.
`frame-size`	Dictionary	The size for the image stack layer. Defaults to the size of the image stack canvas if the tag is not included.
`width`	Number	The width of the image stack layer in pixels.
`height`	Number	The height of the image stack layer in pixels.
`frame-center`	Dictionary	The position of the center of the image stack layer image on the image stack canvas. Defaults to the center of the image stack canvas if the tag is not included. The coordinate is in pixels from the top-left edge of the image stack canvas.
`x`	Number	The horizontal position of the center of the image stack layer.
`y`	Number	The vertical position of the image stack layer.

Sample Contents.json Files

Simple Image Stack Layer

        {
   "info" : {
      "author" : "com.developerName",
      "version" : 1
   },
}

      

Image Stack Layer with Content Reference

        {
   "properties" : {
      "content-reference : {
         "type" : "image-set",
         "name" : "Llamas\/Front",
         "matching-style" : "fully-qualified-name"
      }
   },
   "info" : {
      "author" : "com.developerName",
      "version" : 1
   },
}

      

Image Stack Layer with Size and Center

        {
   "properties" : {
      "frame-size : {
         "width" : 364,
         "height" : 548
      },
      "frame-center : {
         "x" : 1500,
         "y" : 700
      }
   },
   "info" : {
      "author" : "com.developerName",
      "version" : 1
   },
}

      