Asset Catalog Format Reference: LSR Image Stack

A ZIP container that encapsulates the files and folders defining an image stack.

Extension

.lsr

Folder Contents

The LSR file root level contains folders for each image stack layer and a Contents.JSON file with the attributes for the image stack.

Contents.json File

Metadata, canvas size, and list of image stack layers (Table 33-1).

**Table 33-1**LSR image stack tags
Key	Type	Description
`info`	Dictionary	Metadata for the author and format version of the image stack.
`author`	String	Use your bundle ID. LSR files generated by Xcode use `xcode`.
`version`	Number	The format version of the LSR file. Use `1`.
`properties`	Dictionary	Properties for the image stack.
`canvasSize`	Dictionary	The canvas size for the image stack. Defaults to the size of the background layer if the tag is not included.
`width`	Number	The width of the image stack canvas in pixels.
`height`	Number	The height of the image stack canvas in pixels.
`layers`	Array of dictionaries	The layers in the image stack.
`filename`	String	The name of the folder containing the layer.

Sample Contents.json Files

Simple Image Stack

        {
   "info" : {
      "author" : "com.developerName",
      "version" : 1
   },
   "layers" : [
      {
         "filename" : "Foreground.imagestacklayer"
      },
      {
         "filename" : "Llama.imagestacklayer"
      },
      {
        "filename" : "Background.imagestacklayer"
      }
   ]
}

      

Image Stack with Canvas Size

        {
   "info" : {
      "author" : "com.developerName",
      "version" : 1
   },
   "layers" : [
      {
         "filename" : "Foreground.imagestacklayer"
      },
      {
         "filename" : "Llama.imagestacklayer"
      },
      {
        "filename" : "Background.imagestacklayer"
      }
   ],
   "properties" : {
      "canvasSize" : {
         "width" : 2048,
         "height" : 1365
      }
   }
}

      