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Image Files

The Alarmo stores images as BMPs, making it relatively straightforward to extract and modify images on the Alarmo.

Overview

Images on the Alarmo are stored as zstd-compressed BMPs with a BITMAPV4HEADER header type. Additionally, each image is flipped horizontally and rotated -90 degrees before being stored.

Example

For example, let's say we have this PNG image we want to display on the Alarmo:

Test

Image as it appears when viewed on the Alarmo

For it to display properly, we must first convert it to a BMP and flip it accordingly.

If ImageMagick is installed on your system, this can be accomplished with the following command:

magick image.png -flop -rotate -90 -type TrueColorAlpha output.bmp

Test

How the image is stored on the Alarmo

(More Coming Soon)

Work in progress

This page is currently under development.

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