Help with Texture

[mjehrhart]

Hey,

I've been trying this for a bit and I've had no luck at all.

`

fn update(&mut self, ctx: &egui::CtxRef, frame: &epi::Frame) {

  egui::SidePanel::right("right_panel").show(ctx, |ui| {
        let mut widget_size = egui::Vec2::new(200.0, 100.0);

        let image = load_image(include_bytes!("/Users/me/tmp/bucket/jj.png")).unwrap();

        let ( (x,y), widget_size) = image_background();
        println!("x::{}", x);
        println!("y::{}", y);
        let size = (x,y);

        let tex_allocator = frame.tex_allocator().unwrap();
        let texture_id = tex_allocator.alloc_srgba_premultiplied(size, widget_size);

    });

}

fn image_background() -> ((usize, usize), Vec) {
let image_data_bkg = include_bytes!("/Users/matthew/tmp/bucket/jj.png");
let image_bkg = image::load_from_memory(image_data_bkg).expect("Failed to load image");
let image_buffer_bkg = image_bkg.to_rgba8();
let size_bkg = (5200 as usize, 2500 as usize);
let pixels_bkg = image_buffer_bkg.into_vec();
let pixels_bkg: Vec<_> = pixels_bkg
.chunks_exact(4)
.map(|p| egui::Color32::from_rgba_unmultiplied(p[0], p[1], p[2], p[3]))
.collect();

(size_bkg, pixels_bkg)

}

with this code here, the error I get is on "tex_allocator".

error[E0599]: no method named tex_allocatorfound for reference&eframe::epi::Framein the current scope --> src/main.rs:218:39 | 218 | let tex_allocator = frame.tex_allocator().unwrap(); | ^^^^^^^^^^^^^ method not found in&eframe::epi::Frame`

`

I noticed in someone's example that frame used a lifetime [ frame: &epi::Frame<'_' ] but the compiler complains about that as well. I could use some help here.

[mjehrhart]

Any thoughts on this anyone?

the error message is:

no method named \`tex_allocator\` found for struct \`eframe::epi::Frame\` in the current scope method not found in \`eframe::epi::Frame\`rustcE0599

here's an updated code segment:

fn image_background(frame: epi::Frame) -> ((usize, usize), Vec<Color32>) {
    let image_data_bkg = include_bytes!("/Users/matthew/tmp/bucket/jj.png");
    let image_bkg = image::load_from_memory(image_data_bkg).expect("Failed to load image");
    let image_buffer_bkg = image_bkg.to_rgba8();
    let size_bkg = (5200 as usize, 2500 as usize);
    let pixels_bkg = image_buffer_bkg.into_vec();
    let pixels_bkg: Vec<_> = pixels_bkg
        .chunks_exact(4)
        .map(|p| egui::Color32::from_rgba_unmultiplied(p[0], p[1], p[2], p[3]))
        .collect(); 
    let texture_bkg = frame
                .tex_allocator()
                .alloc_srgba_premultiplied(200., &500);
 
    (size_bkg, pixels_bkg)
}

[emilk]

This was changed recently; see the changelog for eframe: https://github.com/emilk/egui/blob/master/eframe/CHANGELOG.md

Also, read the docs: https://docs.rs/epi/latest/epi/struct.Frame.html

[mjehrhart]

Thanks for the response. I see what you are referring to.

So I tried the example at https://github.com/emilk/egui/blob/master/eframe/examples/image.rs but ran into the same issues as the user who commented on bug 1110 - #1110.

My update fn requires CtxRef and not Context, maybe there's an issue there. I am using egui = "0.16.1".

[emilk]

The latest master contains the examples that are compatible with the latest master of egui.

If you are using egui 0.16, you need to look at the example for egui 0.16: https://github.com/emilk/egui/blob/0.16.0/eframe/examples/image.rs

[mjehrhart]

thank you so much, that cleared up so much for me. thanks.