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Desktop: Implement GPU accelerated offscreen rendering and improve rendering efficency (#3056)

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* WIP accelerade offscreen canvas implementation

* Implement vulkan dmabuf import

* Add fps printing

* Add feature gates

* Forgot to add file

* Experimental windows support

* Cast ptr to isize

* Remove testing chrome://flags url

* Experimental macos support for texture import

* Cleanup code and improve latency / frame pacing

* Add path for importing textures on windows through dx12

* Update doc comment

* Import textures through metal on macos

* Review cleanup

---------

Co-authored-by: Timon Schelling <me@timon.zip>
This commit is contained in:
Dennis Kobert
2025-08-21 10:09:38 -07:00
committed by Keavon Chambers
co-authored by Timon Schelling
parent 97978c2491
commit e56f858ced
18 changed files with 1226 additions and 51 deletions
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desktop/src/cef/internal/browser_process_app.rs
+20 -4
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@@ -34,12 +34,28 @@ impl<H: CefEventHandler + Clone> ImplApp for BrowserProcessAppImpl<H> {
fn on_before_command_line_processing(&self, _process_type: Option<&cef::CefString>, command_line: Option<&mut cef::CommandLine>) {
if let Some(cmd) = command_line {
// Disable GPU acceleration, because it is not supported for Offscreen Rendering and can cause crashes.
cmd.append_switch(Some(&CefString::from("disable-gpu")));
cmd.append_switch(Some(&CefString::from("disable-gpu-compositing")));
#[cfg(not(feature = "accelerated_paint"))]
{
// Disable GPU acceleration when accelerated_paint feature is not enabled
cmd.append_switch(Some(&CefString::from("disable-gpu")));
cmd.append_switch(Some(&CefString::from("disable-gpu-compositing")));
}
#[cfg(feature = "accelerated_paint")]
{
// Enable GPU acceleration switches for better performance
cmd.append_switch(Some(&CefString::from("enable-gpu-rasterization")));
cmd.append_switch(Some(&CefString::from("enable-accelerated-2d-canvas")));
}
#[cfg(all(feature = "accelerated_paint", target_os = "linux"))]
{
// Use Vulkan for accelerated painting
cmd.append_switch_with_value(Some(&CefString::from("use-angle")), Some(&CefString::from("vulkan")));
}
// Tell CEF to use Wayland if available
#[cfg(not(any(target_os = "macos", target_os = "windows")))]
#[cfg(target_os = "linux")]
{
let use_wayland = env::var("WAYLAND_DISPLAY")
.ok()