You can directly preload an image into DPaint.js by adding the file parameter to the URL.

If the server doesn't support CORS, or if the url is using HTTP instead of HTTPS, DPaint.js will proxy the image through it's own server.
Inevitably, this is slow and a bit wasteful towards my servers' bandwidth, so please try to setup proper CORS headers if you are using this feature.

Example:

You can start DPaint.js in presentation mode by adding the presentation=true parameter to the URL.
This is useful for displaying image formats that are not supported directly by the browser or by ensuring a sharp pixel zoom for your pixel-art images
Users can zoom and pan the image.
They can exit the presentation mode at any time to return to the editor.

Example:

Use in combination with the file parameter.
If the image is "playable" (e.g. a gif or an animation, or an image that has Color Cycle ranges), you can start playback immediately by adding the play=true parameter to the URL.

Example:

Use in combination with the file parameter.
Set the zoom to fill the available screen space after the image is loaded.

Example:

Opens the gallery after startup and loads the first image from the gallery.

Example:

You can use the postback and putback parameters to define a URL where the image data will be sent to when the user clicks the "Save" button.
The image will be posted as raw binary data.
If your endpoint expects a PUT request, use the putback parameter.
If your endpoint expects a POST request, use the postback parameter.

Together with the file parameter, this allows a nicely integrated roundtrip to integrate DPaint.js in your own system, providing an easy image-editing flow that loads from and saves to your own API.