migrations/egui
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Texture loading in egui (#1110)

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* Move texture allocation into epaint/egui proper
* Add TextureHandle
* egui_glow: cast using bytemuck instead of unsafe code
* Optimize glium painter
* Optimize WebGL
* Add example of loading an image from file
This commit is contained in:
Emil Ernerfeldt
2022-01-15 13:59:52 +01:00
committed by GitHub
parent 6c616a1b69
commit 66d80e2519
59 changed files with 1297 additions and 860 deletions
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47
egui_glium/src/lib.rs
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@@ -104,6 +104,9 @@ pub struct EguiGlium {
pub egui_ctx: egui::Context,
pub egui_winit: egui_winit::State,
pub painter: crate::Painter,
shapes: Vec<egui::epaint::ClippedShape>,
textures_delta: egui::TexturesDelta,
}
impl EguiGlium {
@@ -112,6 +115,8 @@ impl EguiGlium {
egui_ctx: Default::default(),
egui_winit: egui_winit::State::new(display.gl_window().window()),
painter: crate::Painter::new(display),
shapes: Default::default(),
textures_delta: Default::default(),
}
}
@@ -125,35 +130,45 @@ impl EguiGlium {
self.egui_winit.on_event(&self.egui_ctx, event)
}
/// Returns `needs_repaint` and shapes to draw.
pub fn run(
&mut self,
display: &glium::Display,
run_ui: impl FnMut(&egui::Context),
) -> (bool, Vec<egui::epaint::ClippedShape>) {
/// Returns `true` if egui requests a repaint.
///
/// Call [`Self::paint`] later to paint.
pub fn run(&mut self, display: &glium::Display, run_ui: impl FnMut(&egui::Context)) -> bool {
let raw_input = self
.egui_winit
.take_egui_input(display.gl_window().window());
let (egui_output, shapes) = self.egui_ctx.run(raw_input, run_ui);
let needs_repaint = egui_output.needs_repaint;
self.egui_winit
.handle_output(display.gl_window().window(), &self.egui_ctx, egui_output);
(needs_repaint, shapes)
let textures_delta = self.egui_winit.handle_output(
display.gl_window().window(),
&self.egui_ctx,
egui_output,
);
self.shapes = shapes;
self.textures_delta.append(textures_delta);
needs_repaint
}
pub fn paint<T: glium::Surface>(
&mut self,
display: &glium::Display,
target: &mut T,
shapes: Vec<egui::epaint::ClippedShape>,
) {
/// Paint the results of the last call to [`Self::run`].
pub fn paint<T: glium::Surface>(&mut self, display: &glium::Display, target: &mut T) {
let shapes = std::mem::take(&mut self.shapes);
let mut textures_delta = std::mem::take(&mut self.textures_delta);
for (id, image) in textures_delta.set {
self.painter.set_texture(display, id, &image);
}
let clipped_meshes = self.egui_ctx.tessellate(shapes);
self.painter.paint_meshes(
display,
target,
self.egui_ctx.pixels_per_point(),
clipped_meshes,
&self.egui_ctx.font_image(),
);
for id in textures_delta.free.drain(..) {
self.painter.free_texture(id);
}
}
}