Use OpenGL renderer on MacOS older than 13.0

Author: ilmai

plugin-canvas-slint/src/window_adapter.rs

@@ -10,6 +10,8 @@ use cursor_icon::CursorIcon;
 use i_slint_core::{window::{WindowAdapter, WindowAdapterInternal}, renderer::Renderer, platform::{PlatformError, WindowEvent}};
 use i_slint_renderer_skia::{SkiaRenderer, SkiaSharedContext};
 use keyboard_types::Code;
+#[cfg(target_os="macos")]
+use plugin_canvas::is_macos_version_at_least;
 use plugin_canvas::keyboard::KeyboardModifiers;
 use plugin_canvas::{event::EventResponse, LogicalSize};
 use portable_atomic::AtomicF64;
@@ -60,10 +62,18 @@ impl PluginCanvasWindowAdapter {
 
         let skia_context = SkiaSharedContext::default();
 
+        #[cfg(target_os="linux")]
+        let renderer = SkiaRenderer::default(&skia_context);
+
+        #[cfg(target_os="macos")]
+        let renderer = if is_macos_version_at_least(13, 0, 0) {
+            SkiaRenderer::default_metal(&skia_context)
+        } else {
+            SkiaRenderer::default_opengl(&skia_context)
+        };
+
         #[cfg(target_os="windows")]
         let renderer = SkiaRenderer::default_direct3d(&skia_context);
-        #[cfg(not(target_os="windows"))]
-        let renderer = SkiaRenderer::default(&skia_context);
 
         renderer.set_window_handle(plugin_canvas_window.clone(), plugin_canvas_window.clone(), slint_size, None)?;
 

plugin-canvas/src/lib.rs

@@ -10,4 +10,7 @@ pub use dimensions::{LogicalPosition, LogicalSize, PhysicalPosition, PhysicalSiz
 pub use event::{Event, MouseButton};
 pub use window::Window;
 
+#[cfg(target_os="macos")]
+pub use platform::mac::is_macos_version_at_least;
+
 mod platform;

plugin-canvas/src/platform/mac.rs

@@ -2,7 +2,7 @@ pub mod keyboard;
 pub mod view;
 pub mod window;
 
-fn is_macos_version_at_least(major: isize, minor: isize, patch: isize) -> bool {
+pub fn is_macos_version_at_least(major: isize, minor: isize, patch: isize) -> bool {
     let process_info = objc2_foundation::NSProcessInfo::processInfo();
     let version = objc2_foundation::NSOperatingSystemVersion {
         majorVersion: major,