Disable cef GPU acceleration to prevent crashes

Author: timon-schelling

desktop/src/cef/internal/app.rs

@@ -1,6 +1,6 @@
 use cef::rc::{Rc, RcImpl};
 use cef::sys::{_cef_app_t, cef_base_ref_counted_t};
-use cef::{BrowserProcessHandler, ImplApp, SchemeRegistrar, WrapApp};
+use cef::{BrowserProcessHandler, CefString, ImplApp, ImplCommandLine, SchemeRegistrar, WrapApp};
 
 use crate::cef::CefEventHandler;
 use crate::cef::scheme_handler::GraphiteSchemeHandlerFactory;
@@ -29,6 +29,14 @@ impl<H: CefEventHandler + Clone> ImplApp for AppImpl<H> {
 		GraphiteSchemeHandlerFactory::register_schemes(registrar);
 	}
 
+	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")));
+		}
+	}
+
 	fn get_raw(&self) -> *mut _cef_app_t {
 		self.object.cast()
 	}

desktop/src/cef/internal/browser_process_handler.rs

@@ -25,13 +25,13 @@ impl<H: CefEventHandler + Clone> ImplBrowserProcessHandler for BrowserProcessHan
 		cef::register_scheme_handler_factory(Some(&CefString::from(GRAPHITE_SCHEME)), None, Some(&mut SchemeHandlerFactory::new(GraphiteSchemeHandlerFactory::new())));
 	}
 
-	fn get_raw(&self) -> *mut _cef_browser_process_handler_t {
-		self.object.cast()
-	}
-
 	fn on_schedule_message_pump_work(&self, delay_ms: i64) {
 		self.event_handler.schedule_cef_message_loop_work(Instant::now() + Duration::from_millis(delay_ms as u64));
 	}
+
+	fn get_raw(&self) -> *mut _cef_browser_process_handler_t {
+		self.object.cast()
+	}
 }
 
 impl<H: CefEventHandler + Clone> Clone for BrowserProcessHandlerImpl<H> {