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Make egui_glow painter to work on web (#868)

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Add WebGL1 and WebGL2 support to glow painter.
Add "glow" feature to egui_web to use the glow painter there.
Make winit an optional part of egui_glow
This commit is contained in:
triangle drawer
2021-11-04 03:17:07 +09:00
committed by GitHub
parent 1dbe608e73
commit 804722a1ba
21 changed files with 1093 additions and 318 deletions
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26
egui_glow/src/epi_backend.rs
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@@ -1,24 +1,7 @@
use crate::*;
use egui::Color32;
#[cfg(target_os = "windows")]
use glutin::platform::windows::WindowBuilderExtWindows;
impl epi::TextureAllocator for Painter {
fn alloc_srgba_premultiplied(
&mut self,
size: (usize, usize),
srgba_pixels: &[Color32],
) -> egui::TextureId {
let id = self.alloc_user_texture();
self.set_user_texture(id, size, srgba_pixels);
id
}
fn free(&mut self, id: egui::TextureId) {
self.free_user_texture(id);
}
}
struct RequestRepaintEvent;
struct GlowRepaintSignal(std::sync::Mutex<glutin::event_loop::EventLoopProxy<RequestRepaintEvent>>);
@@ -77,7 +60,9 @@ pub fn run(app: Box<dyn epi::App>, native_options: &epi::NativeOptions) -> ! {
event_loop.create_proxy(),
)));
let mut painter = crate::Painter::new(&gl);
let mut painter = crate::Painter::new(&gl, None)
.map_err(|error| eprintln!("some OpenGL error occurred {}\n", error))
.unwrap();
let mut integration = egui_winit::epi::EpiIntegration::new(
"egui_glow",
gl_window.window(),
@@ -111,13 +96,12 @@ pub fn run(app: Box<dyn epi::App>, native_options: &epi::NativeOptions) -> ! {
gl.clear_color(color[0], color[1], color[2], color[3]);
gl.clear(glow::COLOR_BUFFER_BIT);
}
painter.upload_egui_texture(&gl, &integration.egui_ctx.texture());
painter.paint_meshes(
&gl_window,
gl_window.window().inner_size().into(),
&gl,
integration.egui_ctx.pixels_per_point(),
clipped_meshes,
&integration.egui_ctx.texture(),
);
gl_window.swap_buffers().unwrap();