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Code Issues Releases Wiki Activity

Implement image scaling

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This commit is contained in:
Bradlee Speice
2025-04-06 20:59:53 -04:00
parent 5806ebd051
commit 98d9111688
2 changed files with 19 additions and 7 deletions
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12
blog/2025-03-30-draw-compute-shader/draw-compute/src/main.rs
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@ -172,6 +172,7 @@ impl DrawResources {
fn resize(&mut self, width: u64, height: u64) {
self.image_buffer = Self::image_buffer(&self.device, width, height);
self.image_size = glam::uvec2(width as u32, height as u32);
self.bind_group = Self::bind_group(
&self.device,
&self.bind_group_layout,
@ -206,7 +207,7 @@ impl CallbackTrait for DrawCallback {
);
}
let mut viewport = shader::Viewport {
let viewport = shader::Viewport {
image: resources.image_size,
offset: glam::uvec2(self.draw_rect.min.x as u32, self.draw_rect.min.y as u32),
size: glam::uvec2(
@ -273,6 +274,13 @@ impl eframe::App for ComputeDraw {
callback_resources.insert(DrawResources::new(&device, &format, 800, 600));
}
egui::TopBottomPanel::bottom("bottom").show(ctx, |ui| {
let wgpu_render_state = frame.wgpu_render_state().expect("missing WGPU state");
let image_size = wgpu_render_state.renderer.as_ref().read().callback_resources.get::<DrawResources>().unwrap().image_size;
ui.label(format!("Viewport: image={image_size}"))
});
egui::CentralPanel::default().show(ctx, |ui| {
egui::Frame::canvas(ui.style()).show(ui, |ui| {
let interact_rect = ui.available_rect_before_wrap();
@ -301,7 +309,7 @@ fn main() {
eframe::run_native(
"Compute Draw",
native_options,
Box::new(|cc| Ok(Box::new(ComputeDraw { initial_draw: true }))),
Box::new(|_cc| Ok(Box::new(ComputeDraw { initial_draw: true }))),
)
.unwrap()
}