Resize screenshot image

[Youdiie]

Hello, after 0.11 version, I found screenshot feature, but I couldn't change the size of a screenshot result png.
I can change bevy window size, but I just want to resize image.
Is there any way to change size of screenshot image?
Any hint is welcome!

[mockersf]

The method save_screenshot_to_disk does not let you resize, however you can use take_screenshot instead where you are free to do any modification you want on the image before saving it, for example with resize.

Once you have changed the image, you can reuse the code from save_screenshot_to_disk on how to save it (most of the complexity of that function is for wasm support): https://docs.rs/bevy_render/latest/src/bevy_render/view/window/screenshot.rs.html#62-120

    screenshot_manager.take_screenshot(window, move |img| {
            // You can modify `img` here to resize it
            match img.try_into_dynamic() {
                Ok(dyn_img) => {
                    // Or modify `dyn_img` here for more powerful methods
                    match image::ImageFormat::from_path(&path) {
                        Ok(format) => {
                            let img = dyn_img.to_rgb8();
                            match img.save_with_format(&path, format) {
                                Ok(_) => info!("Screenshot saved to {}", path.display()),
                                Err(e) => error!("Cannot save screenshot, IO error: {e}"),
                            }
                        }
                        Err(e) => {
                            error!("Cannot save screenshot, requested format not recognized: {e}")
                        }
                    }
                }
                Err(e) => error!("Cannot save screenshot, screen format cannot be understood: {e}"),
            }
        });

[Youdiie]

@mockersf Thanks for answering! With your code, I could resize dyn_img and save it :)
However, I think modifying 'dyn_img' is resizing the result of changing the texture into an image. The result �quality of dyn_img.resize(5000,3000,filter) was not very good..
Is there any way to set size before changing the texture into an image? 🙏

[mockersf]

With that resolution, are you trying to scale up the image?

The image crate that is used has a a few different filters, but I'm not sure how well they work... you can try them all in that example: https://github.com/image-rs/image/tree/master/examples/scaleup

Resizing before taking the screenshot is currently not possible, they are tied to a specific window. It should be possible to target a camera instead, and then add an offscreen camera of the size you want, but that would require a PR to Bevy before it's available.

[Youdiie]

I understand. I wish it can be possible to resize before taking the screenshot in future version.
Thanks for kind explanation!