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Re-implement PaintCallbacks With Support for WGPU (#1684)

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* Re-implement PaintCallbacks With Support for WGPU

This makes breaking changes to the PaintCallback system, but makes it
flexible enough to support both the WGPU and glow backends with custom
rendering.

Also adds a WGPU equivalent to the glow demo for custom painting.
This commit is contained in:
Zicklag
2022-05-28 10:52:36 -05:00
committed by GitHub
parent 8173093c67
commit 1d9524cc59
22 changed files with 595 additions and 130 deletions
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10
examples/custom_3d_glow/src/main.rs
View File

@@ -76,13 +76,9 @@ impl MyApp {
let callback = egui::PaintCallback {
rect,
callback: std::sync::Arc::new(move |_info, render_ctx| {
if let Some(painter) = render_ctx.downcast_ref::<egui_glow::Painter>() {
rotating_triangle.lock().paint(painter.gl(), angle);
} else {
eprintln!("Can't do custom painting because we are not using a glow context");
}
}),
callback: std::sync::Arc::new(egui_glow::CallbackFn::new(move |_info, painter| {
rotating_triangle.lock().paint(painter.gl(), angle);
})),
};
ui.painter().add(callback);
}

14
examples/custom_3d_three-d/src/main.rs
View File

@@ -60,15 +60,11 @@ impl MyApp {
let callback = egui::PaintCallback {
rect,
callback: std::sync::Arc::new(move |info, render_ctx| {
if let Some(painter) = render_ctx.downcast_ref::<egui_glow::Painter>() {
with_three_d_context(painter.gl(), |three_d| {
paint_with_three_d(three_d, info, angle);
});
} else {
eprintln!("Can't do custom painting because we are not using a glow context");
}
}),
callback: std::sync::Arc::new(egui_glow::CallbackFn::new(move |info, painter| {
with_three_d_context(painter.gl(), |three_d| {
paint_with_three_d(three_d, &info, angle);
});
})),
};
ui.painter().add(callback);
}