migrations/egui
1
0
Fork 0
mirror of https://github.com/emilk/egui.git synced 2026-08-29 21:00:03 -04:00
Code Activity

Add glow::Context to epi::Frame (#1425)

Browse Source 
This can be used, for instance, to:

* Render things to offscreen buffers.
* Read the pixel buffer from the previous frame (glow::Context::read_pixels).
* Render things behind the egui windows.
This commit is contained in:
Emil Ernerfeldt
2022-03-27 15:20:45 +02:00
committed by GitHub
parent b7ebe16cfb
commit 8f178fa4e0
10 changed files with 52 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
egui_glow/src/epi_backend.rs
View File

@@ -1,4 +1,3 @@
use crate::*;
use egui_winit::winit;
struct RequestRepaintEvent;
@@ -50,6 +49,7 @@ pub fn run(app_name: &str, native_options: &epi::NativeOptions, app_creator: epi
let mut integration = egui_winit::epi::EpiIntegration::new(
"egui_glow",
gl.clone(),
painter.max_texture_side(),
gl_window.window(),
storage,
@@ -86,6 +86,10 @@ pub fn run(app_name: &str, native_options: &epi::NativeOptions, app_creator: epi
std::thread::sleep(std::time::Duration::from_millis(10));
}
let screen_size_in_pixels: [u32; 2] = gl_window.window().inner_size().into();
crate::painter::clear(&gl, screen_size_in_pixels, app.clear_color());
let egui::FullOutput {
platform_output,
needs_repaint,
@@ -97,24 +101,14 @@ pub fn run(app_name: &str, native_options: &epi::NativeOptions, app_creator: epi
let clipped_primitives = integration.egui_ctx.tessellate(shapes);
// paint:
{
let color = app.clear_color();
unsafe {
use glow::HasContext as _;
gl.disable(glow::SCISSOR_TEST);
gl.clear_color(color[0], color[1], color[2], color[3]);
gl.clear(glow::COLOR_BUFFER_BIT);
}
painter.paint_and_update_textures(
gl_window.window().inner_size().into(),
integration.egui_ctx.pixels_per_point(),
&clipped_primitives,
&textures_delta,
);
painter.paint_and_update_textures(
screen_size_in_pixels,
integration.egui_ctx.pixels_per_point(),
&clipped_primitives,
&textures_delta,
);
gl_window.swap_buffers().unwrap();
}
gl_window.swap_buffers().unwrap();
{
*control_flow = if integration.should_quit() {

9
egui_glow/src/painter.rs
View File

@@ -627,11 +627,16 @@ impl Painter {
}
}
pub fn clear(gl: &glow::Context, dimension: [u32; 2], clear_color: egui::Rgba) {
pub fn clear(gl: &glow::Context, screen_size_in_pixels: [u32; 2], clear_color: egui::Rgba) {
unsafe {
gl.disable(glow::SCISSOR_TEST);
gl.viewport(0, 0, dimension[0] as i32, dimension[1] as i32);
gl.viewport(
0,
0,
screen_size_in_pixels[0] as i32,
screen_size_in_pixels[1] as i32,
);
let clear_color: Color32 = clear_color.into();
gl.clear_color(