Images

uji.image.fit(data, edge, bytes)

Checks that data holds a PNG, JPEG, GIF or WebP image and returns it ready to send. A photo with an EXIF orientation is turned upright, and an image whose long side passes edge pixels is scaled down. When the result is still larger than bytes, it is saved as JPEG at lower quality, and then at half the size until it fits.

The result is a table with four fields. data holds the image encoded as base64, media_type names its type such as "image/png", and width and height give its size in pixels. An image that needs no change keeps its original bytes. Anything else gives nil and an error message.

local image = uji.image.fit(uji.fs.read("shot.png"), 1568, 3 * 1024 * 1024)