Getting bytes from a loaded image?

[NotQuiteApex]

I currently load a bunch of BMP images with eframe::egui::include_image!(), but I was curious if there was a way to access those images' file data? Presumably it already has the bytes in memory somewhere, is there an easy way to access it?

[ilianoKokoro]

Technically, I think it should be possible to extract the image to some decoded pixels like this, but it's not really optimal :

let image = eframe::egui::include_image!("path/to/image.bmp");
if let Ok(texture) = image.load(ctx) {
    if let Some(color_image) = texture.color_image() {
        let pixels = color_image.pixels.clone();
        let rgba_bytes: Vec<u8> = pixels.iter()
            .flat_map(|c| [c.r(), c.g(), c.b(), c.a()])
            .collect();
    }
}

I think something like this is more optimal if you want to reuse the image :

use image::io::Reader as ImageReader;

let img_bytes = include_bytes!("path/to/image.bmp");
let img = ImageReader::new(Cursor::new(img_bytes))
    .with_guessed_format()?
    .decode()?;

let size = [img.width() as usize, img.height() as usize];
let rgba = img.to_rgba8();
let egui_image = egui::ColorImage::from_rgba_unmultiplied(size, &rgba);