How to copy rendered image from texture_id to clipboard?

[elgar328]

Hi! I'm working on a Bevy application using bevy_egui and I'm trying to implement a feature to copy the rendered 3D preview image to the clipboard.
I have a setup similar to the render_to_image_widget.rs example where I render a 3D scene to a texture and display it in an egui widget using texture_id. The image displays correctly in the UI, but I need to copy it to the clipboard.
Currently, I can get the texture_id from contexts.image_id(&render_image), but I need to convert this to an egui::ColorImage to use ui.ctx().copy_image(). However, I can't find a way to read the pixel data from the texture_id back to CPU memory.
Here's what I'm trying to do:

// This works - displays the image correctly
let texture_id = contexts.image_id(&render_image).unwrap();
ui.painter().image(
    texture_id,
    rect,
    egui::Rect::from_min_max(egui::pos2(0.0, 0.0), egui::pos2(1.0, 1.0)),
    egui::Color32::WHITE,
);

// This is what I need - but how do I get the image data?
if ui.button("Copy to Clipboard").clicked() {
    // How do I convert texture_id to ColorImage?
    let color_image = /* convert texture_id to ColorImage */;
    ui.ctx().copy_image(color_image);
}

The issue is that the rendered image is in GPU memory, but egui::ColorImage needs to be in CPU memory. Is there a built-in way in bevy_egui to read back the texture data, or do I need to use Bevy's GPU readback system separately?
I've tried using Bevy's GpuReadbackPlugin and Readback component, but it's quite complex and I'm wondering if there's a simpler approach through bevy_egui.
Any guidance would be greatly appreciated! Thanks in advance.

[vladbat00]

Hi! Apologies for the delay. Atm, there's no simpler approach though bevy_egui unfortunately. If you have a fully working example, do you mind sharing it or maybe even submitting as a PR to examples/? I'm sure that's a use case some folks might also find useful.
Might also give me some food for thought on how we can make this simpler via bevy_egui.