How to QOI-encode images

Uses libmpix to encode image to the QOI format.

The Quite Ok Image Format (QOI Format) a lossless compression codec with ratios close to PNG at a fraction of the complexity. This makes it a good candidate for use in low-power platforms such as microcontrollers.

How to encode QOI images with libmpix

First load a buffer into an image struct, in RGB format:

struct mpix_image img;
struct mpix_format fmt = { .width = 640, .height = 480, .fourcc = MPIX_FMT_RGB24 };
 
mpix_image_from_buf(&img, buf, sizeof(buf), &fmt);

If the image is not in RGB format, you may then need ot add an extra format conversion step (How to convert pixel formats).

Then encode the image to the QOI format:

mpix_image_qoi_encode(&img);