Add `present_mode` field to `iced_wgpu::Settings`

wgpu/src/settings.rs

@@ -11,6 +11,11 @@ pub struct Settings {
     /// [`Renderer`]: ../struct.Renderer.html
     pub format: wgpu::TextureFormat,
 
+    /// The present mode of the [`Renderer`].
+    ///
+    /// [`Renderer`]: ../struct.Renderer.html
+    pub present_mode: wgpu::PresentMode,
+
     /// The bytes of the font that will be used by default.
     ///
     /// If `None` is provided, a default system font will be chosen.
@@ -29,6 +34,7 @@ impl Default for Settings {
     fn default() -> Settings {
         Settings {
             format: wgpu::TextureFormat::Bgra8UnormSrgb,
+            present_mode: wgpu::PresentMode::Mailbox,
             default_font: None,
             default_text_size: 20,
             antialiasing: None,

wgpu/src/window/compositor.rs

@@ -111,9 +111,9 @@ impl iced_graphics::window::Compositor for Compositor {
             &wgpu::SwapChainDescriptor {
                 usage: wgpu::TextureUsage::OUTPUT_ATTACHMENT,
                 format: self.settings.format,
+                present_mode: self.settings.present_mode,
                 width,
                 height,
-                present_mode: wgpu::PresentMode::Mailbox,
             },
         )
     }