Merge pull request #914 from yusdacra/feat/expose_draw_cache_multithread

feat: expose draw_cache_multithread as a feature

glow/src/backend.rs

@@ -24,7 +24,12 @@ pub struct Backend {
 impl Backend {
     /// Creates a new [`Backend`].
     pub fn new(gl: &glow::Context, settings: Settings) -> Self {
-        let text_pipeline = text::Pipeline::new(gl, settings.default_font);
+        let text_pipeline = text::Pipeline::new(
+            gl,
+            settings.default_font,
+            settings.text_multithreading,
+        );
+
         let quad_pipeline = quad::Pipeline::new(gl);
         let triangle_pipeline = triangle::Pipeline::new(gl);
 

glow/src/settings.rs

@@ -16,7 +16,15 @@ pub struct Settings {
     /// By default, it will be set to 20.
     pub default_text_size: u16,
 
+    /// If enabled, spread text workload in multiple threads when multiple cores
+    /// are available.
+    ///
+    /// By default, it is disabled.
+    pub text_multithreading: bool,
+
     /// The antialiasing strategy that will be used for triangle primitives.
+    ///
+    /// By default, it is `None`.
     pub antialiasing: Option<Antialiasing>,
 }
 
@@ -25,6 +33,7 @@ impl Default for Settings {
         Settings {
             default_font: None,
             default_text_size: 20,
+            text_multithreading: false,
             antialiasing: None,
         }
     }

glow/src/text.rs

@@ -11,7 +11,11 @@ pub struct Pipeline {
 }
 
 impl Pipeline {
-    pub fn new(gl: &glow::Context, default_font: Option<&[u8]>) -> Self {
+    pub fn new(
+        gl: &glow::Context,
+        default_font: Option<&[u8]>,
+        multithreading: bool,
+    ) -> Self {
         let default_font = default_font.map(|slice| slice.to_vec());
 
         // TODO: Font customization
@@ -41,7 +45,7 @@ impl Pipeline {
         let draw_brush =
             glow_glyph::GlyphBrushBuilder::using_font(font.clone())
                 .initial_cache_size((2048, 2048))
-                .draw_cache_multithread(false) // TODO: Expose as a configuration flag
+                .draw_cache_multithread(multithreading)
                 .build(&gl);
 
         let measure_brush =

src/application.rs

@@ -215,6 +215,7 @@ pub trait Application: Sized {
             let renderer_settings = crate::renderer::Settings {
                 default_font: settings.default_font,
                 default_text_size: settings.default_text_size,
+                text_multithreading: settings.text_multithreading,
                 antialiasing: if settings.antialiasing {
                     Some(crate::renderer::settings::Antialiasing::MSAAx4)
                 } else {

src/settings.rs

@@ -25,9 +25,11 @@ pub struct Settings<Flags> {
     /// The default value is 20.
     pub default_text_size: u16,
 
-    /// Whether the [`Application`] should exit when the user requests the
-    /// window to close (e.g. the user presses the close button).
-    pub exit_on_close_request: bool,
+    /// If enabled, spread text workload in multiple threads when multiple cores
+    /// are available.
+    ///
+    /// By default, it is disabled.
+    pub text_multithreading: bool,
 
     /// If set to true, the renderer will try to perform antialiasing for some
     /// primitives.
@@ -39,6 +41,12 @@ pub struct Settings<Flags> {
     ///
     /// [`Canvas`]: crate::widget::Canvas
     pub antialiasing: bool,
+
+    /// Whether the [`Application`] should exit when the user requests the
+    /// window to close (e.g. the user presses the close button).
+    ///
+    /// By default, it is enabled.
+    pub exit_on_close_request: bool,
 }
 
 impl<Flags> Settings<Flags> {
@@ -53,8 +61,9 @@ impl<Flags> Settings<Flags> {
             window: default_settings.window,
             default_font: default_settings.default_font,
             default_text_size: default_settings.default_text_size,
-            exit_on_close_request: default_settings.exit_on_close_request,
+            text_multithreading: default_settings.text_multithreading,
             antialiasing: default_settings.antialiasing,
+            exit_on_close_request: default_settings.exit_on_close_request,
         }
     }
 }
@@ -69,8 +78,9 @@ where
             window: Default::default(),
             default_font: Default::default(),
             default_text_size: 20,
-            exit_on_close_request: true,
+            text_multithreading: false,
             antialiasing: false,
+            exit_on_close_request: true,
         }
     }
 }

wgpu/src/backend.rs

@@ -31,8 +31,13 @@ pub struct Backend {
 impl Backend {
     /// Creates a new [`Backend`].
     pub fn new(device: &wgpu::Device, settings: Settings) -> Self {
-        let text_pipeline =
-            text::Pipeline::new(device, settings.format, settings.default_font);
+        let text_pipeline = text::Pipeline::new(
+            device,
+            settings.format,
+            settings.default_font,
+            settings.text_multithreading,
+        );
+
         let quad_pipeline = quad::Pipeline::new(device, settings.format);
         let triangle_pipeline = triangle::Pipeline::new(
             device,

wgpu/src/settings.rs

@@ -29,7 +29,15 @@ pub struct Settings {
     /// By default, it will be set to 20.
     pub default_text_size: u16,
 
+    /// If enabled, spread text workload in multiple threads when multiple cores
+    /// are available.
+    ///
+    /// By default, it is disabled.
+    pub text_multithreading: bool,
+
     /// The antialiasing strategy that will be used for triangle primitives.
+    ///
+    /// By default, it is `None`.
     pub antialiasing: Option<Antialiasing>,
 }
 
@@ -65,6 +73,7 @@ impl Default for Settings {
             internal_backend: wgpu::BackendBit::PRIMARY,
             default_font: None,
             default_text_size: 20,
+            text_multithreading: false,
             antialiasing: None,
         }
     }

wgpu/src/text.rs

@@ -15,6 +15,7 @@ impl Pipeline {
         device: &wgpu::Device,
         format: wgpu::TextureFormat,
         default_font: Option<&[u8]>,
+        multithreading: bool,
     ) -> Self {
         let default_font = default_font.map(|slice| slice.to_vec());
 
@@ -46,7 +47,7 @@ impl Pipeline {
         let draw_brush =
             wgpu_glyph::GlyphBrushBuilder::using_font(font.clone())
                 .initial_cache_size((2048, 2048))
-                .draw_cache_multithread(false) // TODO: Expose as a configuration flag
+                .draw_cache_multithread(multithreading)
                 .build(device, format);
 
         let measure_brush =