Add text_multithreading to Settings in iced_glow and iced_wgpu

Cargo.toml

@@ -25,8 +25,6 @@ canvas = ["iced_wgpu/canvas"]
 qr_code = ["iced_wgpu/qr_code"]
 # Enables using system fonts
 default_system_font = ["iced_wgpu/default_system_font"]
-# Enables draw_cache_multithread for glyph drawing
-glyph_draw_cache_multithread = ["iced_wgpu/glyph_draw_cache_multithread"]
 # Enables the `iced_glow` renderer. Overrides `iced_wgpu`
 glow = ["iced_glow", "iced_glutin"]
 # Enables the `Canvas` widget for `iced_glow`
@@ -35,8 +33,6 @@ glow_canvas = ["iced_glow/canvas"]
 glow_qr_code = ["iced_glow/qr_code"]
 # Enables using system fonts for `iced_glow`
 glow_default_system_font = ["iced_glow/default_system_font"]
-# Enables draw_cache_multithread for `iced_glow` glyph drawing
-glow_glyph_draw_cache_multithread = ["iced_glow/glyph_draw_cache_multithread"]
 # Enables a debug view in native platforms (press F12)
 debug = ["iced_winit/debug"]
 # Enables `tokio` as the `executor::Default` on native platforms

glow/Cargo.toml

@@ -11,7 +11,6 @@ repository = "https://github.com/hecrj/iced"
 canvas = ["iced_graphics/canvas"]
 qr_code = ["iced_graphics/qr_code"]
 default_system_font = ["iced_graphics/font-source"]
-glyph_draw_cache_multithread = []
 # Not supported yet!
 image = []
 svg = []

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

@@ -16,6 +16,10 @@ 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.
+    pub text_multithreading: bool,
+
     /// The antialiasing strategy that will be used for triangle primitives.
     pub antialiasing: Option<Antialiasing>,
 }
@@ -25,6 +29,7 @@ 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
@@ -41,9 +45,7 @@ impl Pipeline {
         let draw_brush =
             glow_glyph::GlyphBrushBuilder::using_font(font.clone())
                 .initial_cache_size((2048, 2048))
-                .draw_cache_multithread(cfg!(
-                    feature = "glyph_draw_cache_multithread"
-                ))
+                .draw_cache_multithread(multithreading)
                 .build(&gl);
 
         let measure_brush =

wgpu/Cargo.toml

@@ -24,7 +24,6 @@ farbfeld = ["image_rs/farbfeld"]
 canvas = ["iced_graphics/canvas"]
 qr_code = ["iced_graphics/qr_code"]
 default_system_font = ["iced_graphics/font-source"]
-glyph_draw_cache_multithread = []
 
 [dependencies]
 wgpu = "0.8"

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

@@ -29,6 +29,10 @@ 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.
+    pub text_multithreading: bool,
+
     /// The antialiasing strategy that will be used for triangle primitives.
     pub antialiasing: Option<Antialiasing>,
 }
@@ -65,6 +69,7 @@ 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());
 
@@ -46,9 +47,7 @@ impl Pipeline {
         let draw_brush =
             wgpu_glyph::GlyphBrushBuilder::using_font(font.clone())
                 .initial_cache_size((2048, 2048))
-                .draw_cache_multithread(cfg!(
-                    feature = "glyph_draw_cache_multithread"
-                ))
+                .draw_cache_multithread(multithreading)
                 .build(device, format);
 
         let measure_brush =