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eframe: Improve `glow` context switching (#4814) 

Improved `change_gl_context()`

**Before:** 
Create a new `not_current_glcontext`. 

**After:**
If `not_current_glcontext` exists, apply it. Otherwise, create it. 

This will make the program smoother when dragging, etc.
This commit is contained in:
rustbasic 2024-07-11 18:43:21 +09:00 committed by GitHub
parent 3b8453e920
commit 20359a870f
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GPG Key ID: B5690EEEBB952194
1 changed files with 15 additions and 5 deletions
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20
crates/eframe/src/native/glow_integration.rs
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@ -588,6 +588,7 @@ impl GlowWinitRunning {
let GlutinWindowContext {
viewports,
current_gl_context,
not_current_gl_context,
..
} = &mut *glutin;
let viewport = &viewports[&viewport_id];
@ -602,7 +603,7 @@ impl GlowWinitRunning {
{
frame_timer.pause();
change_gl_context(current_gl_context, gl_surface);
change_gl_context(current_gl_context, not_current_gl_context, gl_surface);
frame_timer.resume();
}
@ -645,6 +646,7 @@ impl GlowWinitRunning {
let GlutinWindowContext {
viewports,
current_gl_context,
not_current_gl_context,
..
} = &mut *glutin;
@ -664,7 +666,7 @@ impl GlowWinitRunning {
{
// We may need to switch contexts again, because of immediate viewports:
frame_timer.pause();
change_gl_context(current_gl_context, gl_surface);
change_gl_context(current_gl_context, not_current_gl_context, gl_surface);
frame_timer.resume();
}
@ -866,6 +868,7 @@ impl GlowWinitRunning {
fn change_gl_context(
current_gl_context: &mut Option<glutin::context::PossiblyCurrentContext>,
not_current_gl_context: &mut Option<glutin::context::NotCurrentContext>,
gl_surface: &glutin::surface::Surface<glutin::surface::WindowSurface>,
) {
crate::profile_function!();
@ -884,7 +887,9 @@ fn change_gl_context(
}
}
let not_current = {
let not_current = if let Some(not_current_context) = not_current_gl_context.take() {
not_current_context
} else {
crate::profile_scope!("make_not_current");
current_gl_context
.take()
@ -1227,7 +1232,11 @@ impl GlutinWindowContext {
if let Some(viewport) = self.viewports.get(&viewport_id) {
if let Some(gl_surface) = &viewport.gl_surface {
change_gl_context(&mut self.current_gl_context, gl_surface);
change_gl_context(
&mut self.current_gl_context,
&mut self.not_current_gl_context,
gl_surface,
);
gl_surface.resize(
self.current_gl_context
.as_ref()
@ -1459,6 +1468,7 @@ fn render_immediate_viewport(
let GlutinWindowContext {
current_gl_context,
not_current_gl_context,
viewports,
..
} = &mut *glutin;
@ -1479,7 +1489,7 @@ fn render_immediate_viewport(
let screen_size_in_pixels: [u32; 2] = window.inner_size().into();
change_gl_context(current_gl_context, gl_surface);
change_gl_context(current_gl_context, not_current_gl_context, gl_surface);
let current_gl_context = current_gl_context.as_ref().unwrap();