Merge pull request #359 from hecrj/improvement/update-wgpu_glyph

Update `wgpu_glyph` and `glyph_brush`

wgpu/Cargo.toml

@@ -13,10 +13,10 @@ canvas = ["iced_graphics/canvas"]
 
 [dependencies]
 wgpu = "0.5"
-wgpu_glyph = "0.8"
+wgpu_glyph = "0.9"
+glyph_brush = "0.7"
 zerocopy = "0.3"
 bytemuck = "1.2"
-glyph_brush = "0.6"
 raw-window-handle = "0.3"
 glam = "0.8"
 log = "0.4"

wgpu/src/backend.rs

@@ -159,7 +159,6 @@ impl Backend {
             for text in layer.text.iter() {
                 // Target physical coordinates directly to avoid blurry text
                 let text = wgpu_glyph::Section {
-                    text: text.content,
                     // TODO: We `round` here to avoid rerasterizing text when
                     // its position changes slightly. This can make text feel a
                     // bit "jumpy". We may be able to do better once we improve
@@ -181,12 +180,18 @@ impl Backend {
                         (text.bounds.width * scale_factor).ceil(),
                         (text.bounds.height * scale_factor).ceil(),
                     ),
-                    scale: wgpu_glyph::Scale {
-                        x: text.size * scale_factor,
-                        y: text.size * scale_factor,
-                    },
-                    color: text.color,
-                    font_id: self.text_pipeline.find_font(text.font),
+                    text: vec![wgpu_glyph::Text {
+                        text: text.content,
+                        scale: wgpu_glyph::ab_glyph::PxScale {
+                            x: text.size * scale_factor,
+                            y: text.size * scale_factor,
+                        },
+                        font_id: self.text_pipeline.find_font(text.font),
+                        extra: wgpu_glyph::Extra {
+                            color: text.color,
+                            z: 0.0,
+                        },
+                    }],
                     layout: wgpu_glyph::Layout::default()
                         .h_align(match text.horizontal_alignment {
                             HorizontalAlignment::Left => {

wgpu/src/text.rs

@@ -1,12 +1,13 @@
 use crate::Transformation;
 use iced_graphics::font;
 use std::{cell::RefCell, collections::HashMap};
+use wgpu_glyph::ab_glyph;
 
 #[derive(Debug)]
 pub struct Pipeline {
-    draw_brush: RefCell<wgpu_glyph::GlyphBrush<'static, ()>>,
+    draw_brush: RefCell<wgpu_glyph::GlyphBrush<()>>,
     draw_font_map: RefCell<HashMap<String, wgpu_glyph::FontId>>,
-    measure_brush: RefCell<glyph_brush::GlyphBrush<'static, ()>>,
+    measure_brush: RefCell<glyph_brush::GlyphBrush<()>>,
 }
 
 impl Pipeline {
@@ -25,28 +26,25 @@ impl Pipeline {
                     .unwrap_or_else(|_| font::FALLBACK.to_vec())
             });
 
-        let load_glyph_brush = |font: Vec<u8>| {
-            let builder =
-                wgpu_glyph::GlyphBrushBuilder::using_fonts_bytes(vec![
-                    font.clone()
-                ])?;
+        let font = ab_glyph::FontArc::try_from_vec(default_font)
+            .unwrap_or_else(|_| {
+                log::warn!(
+                    "System font failed to load. Falling back to \
+                    embedded font..."
+                );
 
-            Ok((
-                builder,
-                glyph_brush::GlyphBrushBuilder::using_font_bytes(font).build(),
-            ))
-        };
-
-        let (brush_builder, measure_brush) = load_glyph_brush(default_font)
-            .unwrap_or_else(|_: wgpu_glyph::rusttype::Error| {
-                log::warn!("System font failed to load. Falling back to embedded font...");
-
-                load_glyph_brush(font::FALLBACK.to_vec()).expect("Load fallback font")
+                ab_glyph::FontArc::try_from_slice(font::FALLBACK)
+                    .expect("Load fallback font")
             });
 
-        let draw_brush = brush_builder
-            .initial_cache_size((2048, 2048))
-            .build(device, format);
+        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
+                .build(device, format);
+
+        let measure_brush =
+            glyph_brush::GlyphBrushBuilder::using_font(font).build();
 
         Pipeline {
             draw_brush: RefCell::new(draw_brush),
@@ -91,10 +89,13 @@ impl Pipeline {
         let wgpu_glyph::FontId(font_id) = self.find_font(font);
 
         let section = wgpu_glyph::Section {
-            text: content,
-            scale: wgpu_glyph::Scale { x: size, y: size },
             bounds: (bounds.width, bounds.height),
-            font_id: wgpu_glyph::FontId(font_id),
+            text: vec![wgpu_glyph::Text {
+                text: content,
+                scale: size.into(),
+                font_id: wgpu_glyph::FontId(font_id),
+                extra: wgpu_glyph::Extra::default(),
+            }],
             ..Default::default()
         };
 
@@ -139,11 +140,12 @@ impl Pipeline {
                     return *font_id;
                 }
 
-                // TODO: Find a way to share font data
-                let _ = self.measure_brush.borrow_mut().add_font_bytes(bytes);
+                let font = ab_glyph::FontArc::try_from_slice(bytes)
+                    .expect("Load font");
 
-                let font_id =
-                    self.draw_brush.borrow_mut().add_font_bytes(bytes);
+                let _ = self.measure_brush.borrow_mut().add_font(font.clone());
+
+                let font_id = self.draw_brush.borrow_mut().add_font(font);
 
                 let _ = self
                     .draw_font_map