Yet Another Minecraft Image Placing Addon

Yamipa is an Spigot plugin that allows players to place images (even animated!) on any surface in your Minecraft server without having to install any local client mod.

It is designed with performance and compatibility in mind, so even the most low-specs servers should be able to run it.

Installation

Download the JAR file for the latest release and copy it to the "plugins" directory of your Minecraft server as you'll do with any other plugin. That's it!

Requirements

Before installing Yamipa make sure you meet the following requirements:

CraftBukkit, Spigot or PaperMC v1.16 or v1.17
ProtocolLib v4.6.1 or higher

Configuration

Yamipa is ready-to-go right out of the box. By default, it creates the following files and directories under the plugins/YamipaPlugin directory:

cache: A directory containing cached images to speed up the rendering process. You shouldn't modify its contents.
images: This is the directory where you put the image files you want to place in your Minecraft world.
images.dat: A file holding the list and properties (e.g. coordinates) of all placed images in your server. You shouldn't modify its contents.

You can change the default path of these files by creating a config.yml file in the plugin configuration directory:

verbose: false         # Set to "true" to enable more verbose logging
animate-images: true   # Set to "false" to disable GIF support
images-path: images    # Path to images directory
cache-path: cache      # Path to cache directory
data-path: images.dat  # Path to placed images database file

This library uses bStats to anonymously report the number of installs. If you don't like this, feel free to disable it at any time by adding enabled: false to the bStats configuration file (it's ok, no hard feelings).

Usage

This plugin adds the following commands:

/image clear <x z world> <r> [<placed-by>]: Remove all placed images in a radius of r blocks around an origin.
/image describe: Show detailed information about a placed image.
/image download <url> <filename>: Download an image from a URL and place it in the images directory.
/image list [<page>]: List all available files in the images directory.
/image place <filename> <width> [<height>]: Place an image of size widthxheight blocks.
/image remove: Remove a placed image from the world without deleting the image file.
/image top: List players with the most placed images.

Examples

Show help
/image
Download an image from a URL and save it with another name
/image download "https://www.example.com/a/b/c/1234.jpg" imagename.jpg
Start the dialog to place an image with a width of 3 blocks and auto height
/image place imagename.jpg 3
Start the dialog to place a 3-blocks wide and 2-blocks high image
/image place imagename.jpg 3 2
Start the dialog to remove a placed image while keeping the original file
/image remove
Remove all placed images in a radius of 5 blocks around the spawn
/image clear 0 0 world 5
Remove all images placed by "EvilPlayer" in a radius of 100 blocks in the nether
/image clear 50 70 world_nether 100 EvilPlayer
Remove all legacy placed images (without "placed by" metadata)
/image clear 0 0 world 9999999 00000000-0000-0000-0000-000000000000

Permissions

If you want more granular control over the players who can use a particular set of commands, permissions are the way to go!

Yamipa defines the following permissions, each one corresponding to the command with the same name:

yamipa.clear
yamipa.describe
yamipa.download
yamipa.list
yamipa.place
yamipa.remove
yamipa.top

By default, only server OPs have all permissions granted. You can change this by using a permission plugin, such as LuckPerms or GroupManager.

Both these plugins have been tested to work with Yamipa, although any similar one should work just fine.

How does it work?

As you may have already guessed, Minecraft does not support the placing of image files. Yamipa bypasses this limitation by using two built-in features (item frames and maps) to render custom images.

However, because item frames are entities (and these cause a lot of lag in a server), Yamipa does not actually create any entity in your world. Instead, it tricks your players' clients into thinking there's a placed item frame where there isn't by sending crafted network packets.

In the case of animated images (i.e. GIFs), Yamipa sends all animation frames to the player (which takes a decent amount of bandwidth) and then sends a tiny packet telling the client to switch to the next animation step (i.e. map) every few milliseconds.

IMPORTANT!
Because Yamipa stores a cached copy of an image in memory whenever a player is near it just in case it needs to send it again without compromising performance, your server needs to have a bit of spare RAM to handle this.

The rule of thumb here is 100K per unique loaded image (1MB for animated images). Unique means if the same image with same dimensions is placed multiple times it only counts as one instance.

License

Yamipa is licensed under the MIT License.

alekso56/yamipa