# Custom Wallpaper

Sketchy Maze v0.6.0 introduces the ability to use your own custom wallpaper image to go behind your level.

You may use any common image type (PNG, JPEG, or GIF) as a wallpaper image and it will be tiled across your level following the game's rules. For best results, a wallpaper image should be crafted according to the guidelines on this page.

## How Wallpapers Work

Any (reasonably) sized image will work as a wallpaper, depending on the resolution you need. The image does not need to be square. The game will divide your wallpaper image into four quadrants:

The above image is the game's default Notebook wallpaper with the four quadrants of the image highlighted. The game will slice your wallpaper into four equal quarters and tile them depending on a level's Page Type. Rectangular wallpapers work fine too, just the quadrants will also be rectangular.

The bottom-right quadrant (Tiled Main) is the main repeating background image that covers the entire level. Unbounded levels will use only this part of the wallpaper.

Levels that have a top-left corner (Bounded and No Negative Space) will draw from the other three quadrants when decorating these edges of the level:

- Top Left: the top-left corner of the page; drawn exactly one time per level, where it is anchored to the top-left (0,0) coordinate of the level.
- Tiled Top: the top margin of the page; tiled horizontally across the entire top edge of the level.
- Tiled Left: the left margin of the page; tiled vertically across the entire left edge of the level.

## Making a Simple Tiled Wallpaper

If you already have a tiled pattern you want to use as a wallpaper, and want the simplest way to use that pattern with Sketchy Maze, the quick steps are:

1. Suppose your original texture is 64x64 pixels and it tiles in all directions.
2. Create a new image twice the size of the original (128x128 pixels), and copy/paste your texture into it 4 times. So you now have a 128x128 version of your original 64x64 and it tiles all the same.
3. Pick your new 128x128 texture in Sketchy Maze.

If you have ImageMagick handy at the command line, this command would do this up-tiling work:

    # where clouds.jpg was a 512x512 pixel repeating texture,
    # create a twice-size image tiled from the original, now
    # you have a 1024x1024 up-tiled version of the original.
    convert -size 1024x1024 tile:clouds.jpg clouds-2x.jpg

## Example Wallpapers

Here are a couple of examples you can use. Right-click and save these images and then select them as your custom wallpaper in Sketchy Maze:

### Blue Notebook

A light blue version of the default Notebook paper.

### Clouds

The wallpaper used in the screenshot at the top of this page. Full-color JPEG quality photos work fine as wallpapers. This image was created via the Making a Simple Tiled Wallpaper process detailed above.

## Extracting Wallpapers

Getting a wallpaper back out of a level is not currently an easy task, but it can be done using the `doodad` tool on the command line to inspect your level file.

Your custom levels are saved in your profile directory, so point the `doodad` command at your files therein. The `doodad show` command will show if a level has any attached files, such as wallpaper images:

    $ doodad show example.level
    ===== Level: example.level =====
    Headers:
      File version: 1
      Game version: 0.6.0-alpha
       Level title: Alpha
            Author: kirsle
          Password:
            Locked: false

    Palette:
      - Swatch name: solid
        Attributes:  solid
        Color:       #000000
      - Swatch name: decoration
        Attributes:  none
        Color:       #999999
      - Swatch name: fire
        Attributes:  fire
        Color:       #ff0000
      - Swatch name: water
        Attributes:  water
        Color:       #0000ff

    Level Settings:
      Page type: Bounded
       Max size: 2550x3300
      Wallpaper: custom.b64img

    Attached Files:
      assets/wallpapers/custom.b64img: 1156 bytes

    Actors:
      Level contains 0 actors
      Use -actors or -verbose to serialize Actors

    Chunks:
      Pixels Per Chunk: 128^2
      Number Generated: 0
      Coordinate Range: (0,0) ... (127,127)
      World Dimensions: 127x127
      Use -chunks or -verbose to serialize Chunks

The "Attached Files:" section shows the names and sizes of any files embedded in the level, or "None" if none.

You can get the data of an attached file with `doodad show --attachment=<file>`:

    $ doodad show --attachment=assets/wallpapers/custom.b64img example.level

The image is encoded in Base64 so the above command would spit out a bunch of random numbers and letters. If you pipe it into a base64 decoder you can save it as an image file:

    # (the -a is a shortcut for --attachment)
    $ doodad show -a assets/wallpapers/custom.b64img example.level | base64 -d > out.png

Future releases of the game may make this process easier.

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