Restructure gcore/text module and fix memory leak (#3221)

* Restructure gcore/text module and fix memory leak

* Remove unused import

* Fix default font fallback causing wrong caching and rename to TextContext

* Upgrade demo art

editor/src/messages/portfolio/document/overlays/overlays_message_handler.rs

@@ -15,6 +15,8 @@ pub struct OverlaysMessageHandler {
 	canvas: Option<web_sys::HtmlCanvasElement>,
 	#[cfg(target_family = "wasm")]
 	context: Option<web_sys::CanvasRenderingContext2d>,
+	#[cfg(all(not(target_family = "wasm"), not(test)))]
+	context: Option<super::utility_types::OverlayContext>,
 }
 
 #[message_handler_data]
@@ -80,7 +82,11 @@ impl MessageHandler<OverlaysMessage, OverlaysMessageContext<'_>> for OverlaysMes
 
 				let size = ipp.viewport_bounds.size();
 
-				let overlay_context = OverlayContext::new(size, device_pixel_ratio, visibility_settings);
+				if self.context.is_none() {
+					self.context = Some(OverlayContext::new(size, device_pixel_ratio, visibility_settings));
+				}
+
+				let overlay_context = self.context.as_mut().unwrap();
 
 				if visibility_settings.all() {
 					responses.add(DocumentMessage::GridOverlays { context: overlay_context.clone() });
@@ -89,7 +95,7 @@ impl MessageHandler<OverlaysMessage, OverlaysMessageContext<'_>> for OverlaysMes
 						responses.add(provider(overlay_context.clone()));
 					}
 				}
-				responses.add(FrontendMessage::RenderOverlays { context: overlay_context });
+				responses.add(FrontendMessage::RenderOverlays { context: overlay_context.clone() });
 			}
 			#[cfg(all(not(target_family = "wasm"), test))]
 			OverlaysMessage::Draw => {

editor/src/messages/portfolio/document/overlays/utility_types_vello.rs

@@ -12,7 +12,8 @@ use graphene_std::Color;
 use graphene_std::math::quad::Quad;
 use graphene_std::subpath::{self, Subpath};
 use graphene_std::table::Table;
-use graphene_std::text::{TextAlign, TypesettingConfig, load_font, to_path};
+use graphene_std::text::TextContext;
+use graphene_std::text::{Font, FontCache, TextAlign, TypesettingConfig};
 use graphene_std::vector::click_target::ClickTargetType;
 use graphene_std::vector::misc::point_to_dvec2;
 use graphene_std::vector::{PointId, SegmentId, Vector};
@@ -215,7 +216,7 @@ impl OverlayContext {
 
 	pub fn take_scene(self) -> Scene {
 		let mut internal = self.internal.lock().expect("Failed to lock internal overlay context");
-		std::mem::take(&mut *internal).scene
+		std::mem::take(&mut internal.scene)
 	}
 
 	fn internal(&'_ self) -> MutexGuard<'_, OverlayContextInternal> {
@@ -411,26 +412,31 @@ pub(super) struct OverlayContextInternal {
 	size: DVec2,
 	device_pixel_ratio: f64,
 	visibility_settings: OverlaysVisibilitySettings,
+	font_cache: FontCache,
+	thread_text: TextContext,
 }
 
 impl Default for OverlayContextInternal {
 	fn default() -> Self {
-		Self {
-			scene: Scene::new(),
-			size: DVec2::ZERO,
-			device_pixel_ratio: 1.0,
-			visibility_settings: OverlaysVisibilitySettings::default(),
-		}
+		Self::new(DVec2::new(100., 100.), 1., OverlaysVisibilitySettings::default())
 	}
 }
 
 impl OverlayContextInternal {
 	pub(super) fn new(size: DVec2, device_pixel_ratio: f64, visibility_settings: OverlaysVisibilitySettings) -> Self {
+		let mut font_cache = FontCache::default();
+		// Initialize with the hardcoded font used by overlay text
+		const FONT_DATA: &[u8] = include_bytes!("source-sans-pro-regular.ttf");
+		let font = Font::new("Source Sans Pro".to_string(), "Regular".to_string());
+		font_cache.insert(font, String::new(), FONT_DATA.to_vec());
+
 		Self {
 			scene: Scene::new(),
 			size,
 			device_pixel_ratio,
 			visibility_settings,
+			font_cache,
+			thread_text: TextContext::default(),
 		}
 	}
 
@@ -1007,7 +1013,7 @@ impl OverlayContextInternal {
 		self.scene.fill(peniko::Fill::NonZero, self.get_transform(), &brush, None, &path);
 	}
 
-	fn get_width(&self, text: &str) -> f64 {
+	fn get_width(&mut self, text: &str) -> f64 {
 		// Use the actual text-to-path system to get precise text width
 		const FONT_SIZE: f64 = 12.0;
 
@@ -1024,13 +1030,9 @@ impl OverlayContextInternal {
 		// Load Source Sans Pro font data
 		// TODO: Grab this from the node_modules folder (either with `include_bytes!` or ideally at runtime) instead of checking the font file into the repo.
 		// TODO: And maybe use the WOFF2 version (if it's supported) for its smaller, compressed file size.
-		const FONT_DATA: &[u8] = include_bytes!("source-sans-pro-regular.ttf");
-		let font_blob = Some(load_font(FONT_DATA));
-
-		// Convert text to paths and calculate actual bounds
-		let text_table = to_path(text, font_blob, typesetting, false);
-		let text_bounds = self.calculate_text_bounds(&text_table);
-		text_bounds.width()
+		let font = Font::new("Source Sans Pro".to_string(), "Regular".to_string());
+		let bounds = self.thread_text.bounding_box(text, &font, &self.font_cache, typesetting, false);
+		bounds.x
 	}
 
 	fn text(&mut self, text: &str, font_color: &str, background_color: Option<&str>, transform: DAffine2, padding: f64, pivot: [Pivot; 2]) {
@@ -1051,15 +1053,17 @@ impl OverlayContextInternal {
 		// Load Source Sans Pro font data
 		// TODO: Grab this from the node_modules folder (either with `include_bytes!` or ideally at runtime) instead of checking the font file into the repo.
 		// TODO: And maybe use the WOFF2 version (if it's supported) for its smaller, compressed file size.
-		const FONT_DATA: &[u8] = include_bytes!("source-sans-pro-regular.ttf");
-		let font_blob = Some(load_font(FONT_DATA));
+		let font = Font::new("Source Sans Pro".to_string(), "Regular".to_string());
 
-		// Convert text to vector paths using the existing text system
-		let text_table = to_path(text, font_blob, typesetting, false);
-		// Calculate text bounds from the generated paths
-		let text_bounds = self.calculate_text_bounds(&text_table);
-		let text_width = text_bounds.width();
-		let text_height = text_bounds.height();
+		// Get text dimensions directly from layout
+		let text_size = self.thread_text.bounding_box(text, &font, &self.font_cache, typesetting, false);
+		let text_width = text_size.x;
+		let text_height = text_size.y;
+		// Create a rect from the size (assuming text starts at origin)
+		let text_bounds = kurbo::Rect::new(0.0, 0.0, text_width, text_height);
+
+		// Convert text to vector paths for rendering
+		let text_table = self.thread_text.to_path(text, &font, &self.font_cache, typesetting, false);
 
 		// Calculate position based on pivot
 		let mut position = DVec2::ZERO;
@@ -1094,56 +1098,6 @@ impl OverlayContextInternal {
 		self.render_text_paths(&text_table, font_color, vello_transform);
 	}
 
-	// Calculate bounds of text from vector table
-	fn calculate_text_bounds(&self, text_table: &Table<Vector>) -> kurbo::Rect {
-		let mut min_x = f64::INFINITY;
-		let mut min_y = f64::INFINITY;
-		let mut max_x = f64::NEG_INFINITY;
-		let mut max_y = f64::NEG_INFINITY;
-
-		for row in text_table.iter() {
-			// Use the existing segment_bezier_iter to get all bezier curves
-			for (_, bezier, _, _) in row.element.segment_bezier_iter() {
-				let transformed_bezier = bezier.apply_transformation(|point| row.transform.transform_point2(point));
-
-				// Add start and end points to bounds
-				let points = [transformed_bezier.start, transformed_bezier.end];
-				for point in points {
-					min_x = min_x.min(point.x);
-					min_y = min_y.min(point.y);
-					max_x = max_x.max(point.x);
-					max_y = max_y.max(point.y);
-				}
-
-				// Add handle points if they exist
-				match transformed_bezier.handles {
-					subpath::BezierHandles::Quadratic { handle } => {
-						min_x = min_x.min(handle.x);
-						min_y = min_y.min(handle.y);
-						max_x = max_x.max(handle.x);
-						max_y = max_y.max(handle.y);
-					}
-					subpath::BezierHandles::Cubic { handle_start, handle_end } => {
-						for handle in [handle_start, handle_end] {
-							min_x = min_x.min(handle.x);
-							min_y = min_y.min(handle.y);
-							max_x = max_x.max(handle.x);
-							max_y = max_y.max(handle.y);
-						}
-					}
-					_ => {}
-				}
-			}
-		}
-
-		if min_x.is_finite() && min_y.is_finite() && max_x.is_finite() && max_y.is_finite() {
-			kurbo::Rect::new(min_x, min_y, max_x, max_y)
-		} else {
-			// Fallback for empty text
-			kurbo::Rect::new(0.0, 0.0, 0.0, 12.0)
-		}
-	}
-
 	// Render text paths to the vello scene using existing infrastructure
 	fn render_text_paths(&mut self, text_table: &Table<Vector>, font_color: &str, base_transform: kurbo::Affine) {
 		let color = Self::parse_color(font_color);

editor/src/messages/tool/common_functionality/utility_functions.rs

@@ -15,7 +15,7 @@ use graph_craft::document::value::TaggedValue;
 use graphene_std::renderer::Quad;
 use graphene_std::subpath::{Bezier, BezierHandles};
 use graphene_std::table::Table;
-use graphene_std::text::{FontCache, load_font};
+use graphene_std::text::FontCache;
 use graphene_std::vector::algorithms::bezpath_algorithms::pathseg_compute_lookup_table;
 use graphene_std::vector::misc::{HandleId, ManipulatorPointId, dvec2_to_point};
 use graphene_std::vector::{HandleExt, PointId, SegmentId, Vector, VectorModification, VectorModificationType};
@@ -74,8 +74,7 @@ pub fn text_bounding_box(layer: LayerNodeIdentifier, document: &DocumentMessageH
 		return Quad::from_box([DVec2::ZERO, DVec2::ZERO]);
 	};
 
-	let font_data = font_cache.get(font).map(|data| load_font(data));
-	let far = graphene_std::text::bounding_box(text, font_data, typesetting, false);
+	let far = graphene_std::text::bounding_box(text, font, font_cache, typesetting, false);
 
 	// TODO: Once the instance tables refactor is complete and per_glyph_instances can be removed (since it'll be the default),
 	// TODO: remove this because the top of the dashed bounding overlay should no longer be based on the first line's baseline.

editor/src/messages/tool/tool_messages/text_tool.rs

@@ -17,7 +17,7 @@ use graph_craft::document::value::TaggedValue;
 use graph_craft::document::{NodeId, NodeInput};
 use graphene_std::Color;
 use graphene_std::renderer::Quad;
-use graphene_std::text::{Font, FontCache, TextAlign, TypesettingConfig, lines_clipping, load_font};
+use graphene_std::text::{Font, FontCache, TextAlign, TypesettingConfig, lines_clipping};
 use graphene_std::vector::style::Fill;
 
 #[derive(Default, ExtractField)]
@@ -513,8 +513,7 @@ impl Fsm for TextToolFsmState {
 					transform: document.metadata().transform_to_viewport(tool_data.layer).to_cols_array(),
 				});
 				if let Some(editing_text) = tool_data.editing_text.as_mut() {
-					let font_data = font_cache.get(&editing_text.font).map(|data| load_font(data));
-					let far = graphene_std::text::bounding_box(&tool_data.new_text, font_data, editing_text.typesetting, false);
+					let far = graphene_std::text::bounding_box(&tool_data.new_text, &editing_text.font, font_cache, editing_text.typesetting, false);
 					if far.x != 0. && far.y != 0. {
 						let quad = Quad::from_box([DVec2::ZERO, far]);
 						let transformed_quad = document.metadata().transform_to_viewport(tool_data.layer) * quad;
@@ -562,8 +561,7 @@ impl Fsm for TextToolFsmState {
 						// Draw red overlay if text is clipped
 						let transformed_quad = layer_transform * bounds;
 						if let Some((text, font, typesetting, _)) = graph_modification_utils::get_text(layer.unwrap(), &document.network_interface) {
-							let font_data = font_cache.get(font).map(|data| load_font(data));
-							if lines_clipping(text.as_str(), font_data, typesetting) {
+							if lines_clipping(text.as_str(), font, font_cache, typesetting) {
 								overlay_context.line(transformed_quad.0[2], transformed_quad.0[3], Some(COLOR_OVERLAY_RED), Some(3.));
 							}
 						}

node-graph/gcore/src/text.rs

@@ -1,8 +1,11 @@
 mod font_cache;
+mod path_builder;
+mod text_context;
 mod to_path;
 
 use dyn_any::DynAny;
 pub use font_cache::*;
+pub use text_context::TextContext;
 pub use to_path::*;
 
 /// Alignment of lines of type within a text block.
@@ -29,3 +32,28 @@ impl From<TextAlign> for parley::Alignment {
 		}
 	}
 }
+
+#[derive(PartialEq, Clone, Copy, Debug, serde::Serialize, serde::Deserialize)]
+pub struct TypesettingConfig {
+	pub font_size: f64,
+	pub line_height_ratio: f64,
+	pub character_spacing: f64,
+	pub max_width: Option<f64>,
+	pub max_height: Option<f64>,
+	pub tilt: f64,
+	pub align: TextAlign,
+}
+
+impl Default for TypesettingConfig {
+	fn default() -> Self {
+		Self {
+			font_size: 24.,
+			line_height_ratio: 1.2,
+			character_spacing: 0.,
+			max_width: None,
+			max_height: None,
+			tilt: 0.,
+			align: TextAlign::default(),
+		}
+	}
+}

node-graph/gcore/src/text/font_cache.rs

@@ -1,5 +1,7 @@
 use dyn_any::DynAny;
+use parley::fontique::Blob;
 use std::collections::HashMap;
+use std::sync::Arc;
 
 /// A font type (storing font family and font style and an optional preview URL)
 #[derive(Debug, Clone, serde::Serialize, serde::Deserialize, Hash, PartialEq, Eq, DynAny, specta::Type)]
@@ -50,8 +52,13 @@ impl FontCache {
 	}
 
 	/// Try to get the bytes for a font
-	pub fn get(&self, font: &Font) -> Option<&Vec<u8>> {
-		self.resolve_font(font).and_then(|font| self.font_file_data.get(font))
+	pub fn get<'a>(&'a self, font: &'a Font) -> Option<(&'a Vec<u8>, &'a Font)> {
+		self.resolve_font(font).and_then(|font| self.font_file_data.get(font).map(|data| (data, font)))
+	}
+
+	/// Get font data as a Blob for use with parley/skrifa
+	pub fn get_blob<'a>(&'a self, font: &'a Font) -> Option<(Blob<u8>, &'a Font)> {
+		self.get(font).map(|(data, font)| (Blob::new(Arc::new(data.clone())), font))
 	}
 
 	/// Check if the font is already loaded

node-graph/gcore/src/text/path_builder.rs

@@ -0,0 +1,158 @@
+use crate::subpath::{ManipulatorGroup, Subpath};
+use crate::table::{Table, TableRow};
+use crate::vector::{PointId, Vector};
+use glam::{DAffine2, DVec2};
+use parley::GlyphRun;
+use skrifa::GlyphId;
+use skrifa::instance::{LocationRef, NormalizedCoord, Size};
+use skrifa::outline::{DrawSettings, OutlinePen};
+use skrifa::raw::FontRef as ReadFontsRef;
+use skrifa::{MetadataProvider, OutlineGlyph};
+
+pub struct PathBuilder {
+	current_subpath: Subpath<PointId>,
+	origin: DVec2,
+	glyph_subpaths: Vec<Subpath<PointId>>,
+	pub vector_table: Table<Vector>,
+	scale: f64,
+	id: PointId,
+}
+
+impl PathBuilder {
+	pub fn new(per_glyph_instances: bool, scale: f64) -> Self {
+		Self {
+			current_subpath: Subpath::new(Vec::new(), false),
+			glyph_subpaths: Vec::new(),
+			vector_table: if per_glyph_instances { Table::new() } else { Table::new_from_element(Vector::default()) },
+			scale,
+			id: PointId::ZERO,
+			origin: DVec2::default(),
+		}
+	}
+
+	fn point(&self, x: f32, y: f32) -> DVec2 {
+		DVec2::new(self.origin.x + x as f64, self.origin.y - y as f64) * self.scale
+	}
+
+	#[allow(clippy::too_many_arguments)]
+	fn draw_glyph(&mut self, glyph: &OutlineGlyph<'_>, size: f32, normalized_coords: &[NormalizedCoord], glyph_offset: DVec2, style_skew: Option<DAffine2>, skew: DAffine2, per_glyph_instances: bool) {
+		let location_ref = LocationRef::new(normalized_coords);
+		let settings = DrawSettings::unhinted(Size::new(size), location_ref);
+		glyph.draw(settings, self).unwrap();
+
+		// Apply transforms in correct order: style-based skew first, then user-requested skew
+		// This ensures font synthesis (italic) is applied before user transformations
+		for glyph_subpath in &mut self.glyph_subpaths {
+			if let Some(style_skew) = style_skew {
+				glyph_subpath.apply_transform(style_skew);
+			}
+
+			glyph_subpath.apply_transform(skew);
+		}
+
+		if per_glyph_instances {
+			self.vector_table.push(TableRow {
+				element: Vector::from_subpaths(core::mem::take(&mut self.glyph_subpaths), false),
+				transform: DAffine2::from_translation(glyph_offset),
+				..Default::default()
+			});
+		} else {
+			for subpath in self.glyph_subpaths.drain(..) {
+				// Unwrapping here is ok because `self.vector_table` is initialized with a single `Vector` table element
+				self.vector_table.get_mut(0).unwrap().element.append_subpath(subpath, false);
+			}
+		}
+	}
+
+	pub fn render_glyph_run(&mut self, glyph_run: &GlyphRun<'_, ()>, tilt: f64, per_glyph_instances: bool) {
+		let mut run_x = glyph_run.offset();
+		let run_y = glyph_run.baseline();
+
+		let run = glyph_run.run();
+
+		// User-requested tilt applied around baseline to avoid vertical displacement
+		// Translation ensures rotation point is at the baseline, not origin
+		let skew = if per_glyph_instances {
+			DAffine2::from_cols_array(&[1., 0., -tilt.to_radians().tan(), 1., 0., 0.])
+		} else {
+			DAffine2::from_translation(DVec2::new(0., run_y as f64))
+				* DAffine2::from_cols_array(&[1., 0., -tilt.to_radians().tan(), 1., 0., 0.])
+				* DAffine2::from_translation(DVec2::new(0., -run_y as f64))
+		};
+
+		let synthesis = run.synthesis();
+
+		// Font synthesis (e.g., synthetic italic) applied separately from user transforms
+		// This preserves the distinction between font styling and user transformations
+		let style_skew = synthesis.skew().map(|angle| {
+			if per_glyph_instances {
+				DAffine2::from_cols_array(&[1., 0., -angle.to_radians().tan() as f64, 1., 0., 0.])
+			} else {
+				DAffine2::from_translation(DVec2::new(0., run_y as f64))
+					* DAffine2::from_cols_array(&[1., 0., -angle.to_radians().tan() as f64, 1., 0., 0.])
+					* DAffine2::from_translation(DVec2::new(0., -run_y as f64))
+			}
+		});
+
+		let font = run.font();
+		let font_size = run.font_size();
+
+		let normalized_coords = run.normalized_coords().iter().map(|coord| NormalizedCoord::from_bits(*coord)).collect::<Vec<_>>();
+
+		// TODO: This can be cached for better performance
+		let font_collection_ref = font.data.as_ref();
+		let font_ref = ReadFontsRef::from_index(font_collection_ref, font.index).unwrap();
+		let outlines = font_ref.outline_glyphs();
+
+		for glyph in glyph_run.glyphs() {
+			let glyph_offset = DVec2::new((run_x + glyph.x) as f64, (run_y - glyph.y) as f64);
+			run_x += glyph.advance;
+
+			let glyph_id = GlyphId::from(glyph.id);
+			if let Some(glyph_outline) = outlines.get(glyph_id) {
+				if !per_glyph_instances {
+					self.origin = glyph_offset;
+				}
+				self.draw_glyph(&glyph_outline, font_size, &normalized_coords, glyph_offset, style_skew, skew, per_glyph_instances);
+			}
+		}
+	}
+
+	pub fn finalize(mut self) -> Table<Vector> {
+		if self.vector_table.is_empty() {
+			self.vector_table = Table::new_from_element(Vector::default());
+		}
+		self.vector_table
+	}
+}
+
+impl OutlinePen for PathBuilder {
+	fn move_to(&mut self, x: f32, y: f32) {
+		if !self.current_subpath.is_empty() {
+			self.glyph_subpaths.push(std::mem::replace(&mut self.current_subpath, Subpath::new(Vec::new(), false)));
+		}
+		self.current_subpath.push_manipulator_group(ManipulatorGroup::new_anchor_with_id(self.point(x, y), self.id.next_id()));
+	}
+
+	fn line_to(&mut self, x: f32, y: f32) {
+		self.current_subpath.push_manipulator_group(ManipulatorGroup::new_anchor_with_id(self.point(x, y), self.id.next_id()));
+	}
+
+	fn quad_to(&mut self, x1: f32, y1: f32, x2: f32, y2: f32) {
+		let [handle, anchor] = [self.point(x1, y1), self.point(x2, y2)];
+		self.current_subpath.last_manipulator_group_mut().unwrap().out_handle = Some(handle);
+		self.current_subpath.push_manipulator_group(ManipulatorGroup::new_with_id(anchor, None, None, self.id.next_id()));
+	}
+
+	fn curve_to(&mut self, x1: f32, y1: f32, x2: f32, y2: f32, x3: f32, y3: f32) {
+		let [handle1, handle2, anchor] = [self.point(x1, y1), self.point(x2, y2), self.point(x3, y3)];
+		self.current_subpath.last_manipulator_group_mut().unwrap().out_handle = Some(handle1);
+		self.current_subpath
+			.push_manipulator_group(ManipulatorGroup::new_with_id(anchor, Some(handle2), None, self.id.next_id()));
+	}
+
+	fn close(&mut self) {
+		self.current_subpath.set_closed(true);
+		self.glyph_subpaths.push(std::mem::replace(&mut self.current_subpath, Subpath::new(Vec::new(), false)));
+	}
+}

node-graph/gcore/src/text/text_context.rs

@@ -0,0 +1,129 @@
+use super::{Font, FontCache, TypesettingConfig};
+use crate::table::Table;
+use crate::vector::Vector;
+use core::cell::RefCell;
+use glam::DVec2;
+use parley::fontique::{Blob, FamilyId, FontInfo};
+use parley::{AlignmentOptions, FontContext, Layout, LayoutContext, LineHeight, PositionedLayoutItem, StyleProperty};
+use std::collections::HashMap;
+
+use super::path_builder::PathBuilder;
+
+thread_local! {
+	static THREAD_TEXT: RefCell<TextContext> = RefCell::new(TextContext::default());
+}
+
+/// Unified thread-local text processing context that combines font and layout management
+/// for efficient text rendering operations.
+#[derive(Default)]
+pub struct TextContext {
+	font_context: FontContext,
+	layout_context: LayoutContext<()>,
+	/// Cached font metadata for performance optimization
+	font_info_cache: HashMap<Font, (FamilyId, FontInfo)>,
+}
+
+impl TextContext {
+	/// Access the thread-local TextContext instance for text processing operations
+	pub fn with_thread_local<F, R>(f: F) -> R
+	where
+		F: FnOnce(&mut TextContext) -> R,
+	{
+		THREAD_TEXT.with_borrow_mut(f)
+	}
+
+	/// Resolve a font and return its data as a Blob if available
+	fn resolve_font_data<'a>(&self, font: &'a Font, font_cache: &'a FontCache) -> Option<(Blob<u8>, &'a Font)> {
+		font_cache.get_blob(font)
+	}
+
+	/// Get or cache font information for a given font
+	fn get_font_info(&mut self, font: &Font, font_data: &Blob<u8>) -> Option<(String, FontInfo)> {
+		// Check if we already have the font info cached
+		if let Some((family_id, font_info)) = self.font_info_cache.get(font) {
+			if let Some(family_name) = self.font_context.collection.family_name(*family_id) {
+				return Some((family_name.to_string(), font_info.clone()));
+			}
+		}
+
+		// Register the font and cache the info
+		let families = self.font_context.collection.register_fonts(font_data.clone(), None);
+
+		families.first().and_then(|(family_id, fonts_info)| {
+			fonts_info.first().and_then(|font_info| {
+				self.font_context.collection.family_name(*family_id).map(|family_name| {
+					// Cache the font info for future use
+					self.font_info_cache.insert(font.clone(), (*family_id, font_info.clone()));
+					(family_name.to_string(), font_info.clone())
+				})
+			})
+		})
+	}
+
+	/// Create a text layout using the specified font and typesetting configuration
+	fn layout_text(&mut self, text: &str, font: &Font, font_cache: &FontCache, typesetting: TypesettingConfig) -> Option<Layout<()>> {
+		// Note that the actual_font may not be the desired font if that font is not yet loaded.
+		// It is important not to cache the default font under the name of another font.
+		let (font_data, actual_font) = self.resolve_font_data(font, font_cache)?;
+		let (font_family, font_info) = self.get_font_info(actual_font, &font_data)?;
+
+		const DISPLAY_SCALE: f32 = 1.;
+		let mut builder = self.layout_context.ranged_builder(&mut self.font_context, text, DISPLAY_SCALE, false);
+
+		builder.push_default(StyleProperty::FontSize(typesetting.font_size as f32));
+		builder.push_default(StyleProperty::LetterSpacing(typesetting.character_spacing as f32));
+		builder.push_default(StyleProperty::FontStack(parley::FontStack::Single(parley::FontFamily::Named(std::borrow::Cow::Owned(font_family)))));
+		builder.push_default(StyleProperty::FontWeight(font_info.weight()));
+		builder.push_default(StyleProperty::FontStyle(font_info.style()));
+		builder.push_default(StyleProperty::FontWidth(font_info.width()));
+		builder.push_default(LineHeight::FontSizeRelative(typesetting.line_height_ratio as f32));
+
+		let mut layout: Layout<()> = builder.build(text);
+
+		layout.break_all_lines(typesetting.max_width.map(|mw| mw as f32));
+		layout.align(typesetting.max_width.map(|max_w| max_w as f32), typesetting.align.into(), AlignmentOptions::default());
+
+		Some(layout)
+	}
+
+	/// Convert text to vector paths using the specified font and typesetting configuration
+	pub fn to_path(&mut self, text: &str, font: &Font, font_cache: &FontCache, typesetting: TypesettingConfig, per_glyph_instances: bool) -> Table<Vector> {
+		let Some(layout) = self.layout_text(text, font, font_cache, typesetting) else {
+			return Table::new_from_element(Vector::default());
+		};
+
+		let mut path_builder = PathBuilder::new(per_glyph_instances, layout.scale() as f64);
+
+		for line in layout.lines() {
+			for item in line.items() {
+				if let PositionedLayoutItem::GlyphRun(glyph_run) = item {
+					path_builder.render_glyph_run(&glyph_run, typesetting.tilt, per_glyph_instances);
+				}
+			}
+		}
+
+		path_builder.finalize()
+	}
+
+	/// Calculate the bounding box of text using the specified font and typesetting configuration
+	pub fn bounding_box(&mut self, text: &str, font: &Font, font_cache: &FontCache, typesetting: TypesettingConfig, for_clipping_test: bool) -> DVec2 {
+		if !for_clipping_test {
+			if let (Some(max_height), Some(max_width)) = (typesetting.max_height, typesetting.max_width) {
+				return DVec2::new(max_width, max_height);
+			}
+		}
+
+		let Some(layout) = self.layout_text(text, font, font_cache, typesetting) else {
+			return DVec2::ZERO;
+		};
+
+		DVec2::new(layout.full_width() as f64, layout.height() as f64)
+	}
+
+	/// Check if text lines are being clipped due to height constraints
+	pub fn lines_clipping(&mut self, text: &str, font: &Font, font_cache: &FontCache, typesetting: TypesettingConfig) -> bool {
+		let Some(max_height) = typesetting.max_height else { return false };
+		let bounds = self.bounding_box(text, font, font_cache, typesetting, true);
+		max_height < bounds.y
+	}
+}

node-graph/gcore/src/text/to_path.rs

@@ -1,261 +1,23 @@
-use super::TextAlign;
-use crate::subpath::{ManipulatorGroup, Subpath};
-use crate::table::{Table, TableRow};
-use crate::vector::{PointId, Vector};
-use core::cell::RefCell;
-use glam::{DAffine2, DVec2};
+use super::text_context::TextContext;
+use super::{Font, FontCache, TypesettingConfig};
+use crate::table::Table;
+use crate::vector::Vector;
+use glam::DVec2;
 use parley::fontique::Blob;
-use parley::{AlignmentOptions, FontContext, GlyphRun, Layout, LayoutContext, LineHeight, PositionedLayoutItem, StyleProperty};
-use skrifa::GlyphId;
-use skrifa::instance::{LocationRef, NormalizedCoord, Size};
-use skrifa::outline::{DrawSettings, OutlinePen};
-use skrifa::raw::FontRef as ReadFontsRef;
-use skrifa::{MetadataProvider, OutlineGlyph};
 use std::sync::Arc;
 
-// Thread-local storage avoids expensive re-initialization of font and layout contexts
-// across multiple text rendering operations within the same thread
-thread_local! {
-	static FONT_CONTEXT: RefCell<FontContext> = RefCell::new(FontContext::new());
-	static LAYOUT_CONTEXT: RefCell<LayoutContext<()>> = RefCell::new(LayoutContext::new());
+pub fn to_path(text: &str, font: &Font, font_cache: &FontCache, typesetting: TypesettingConfig, per_glyph_instances: bool) -> Table<Vector> {
+	TextContext::with_thread_local(|ctx| ctx.to_path(text, font, font_cache, typesetting, per_glyph_instances))
 }
 
-struct PathBuilder {
-	current_subpath: Subpath<PointId>,
-	origin: DVec2,
-	glyph_subpaths: Vec<Subpath<PointId>>,
-	vector_table: Table<Vector>,
-	scale: f64,
-	id: PointId,
-}
-
-impl PathBuilder {
-	fn point(&self, x: f32, y: f32) -> DVec2 {
-		DVec2::new(self.origin.x + x as f64, self.origin.y - y as f64) * self.scale
-	}
-
-	#[allow(clippy::too_many_arguments)]
-	fn draw_glyph(&mut self, glyph: &OutlineGlyph<'_>, size: f32, normalized_coords: &[NormalizedCoord], glyph_offset: DVec2, style_skew: Option<DAffine2>, skew: DAffine2, per_glyph_instances: bool) {
-		let location_ref = LocationRef::new(normalized_coords);
-		let settings = DrawSettings::unhinted(Size::new(size), location_ref);
-		glyph.draw(settings, self).unwrap();
-
-		// Apply transforms in correct order: style-based skew first, then user-requested skew
-		// This ensures font synthesis (italic) is applied before user transformations
-		for glyph_subpath in &mut self.glyph_subpaths {
-			if let Some(style_skew) = style_skew {
-				glyph_subpath.apply_transform(style_skew);
-			}
-
-			glyph_subpath.apply_transform(skew);
-		}
-
-		if per_glyph_instances {
-			self.vector_table.push(TableRow {
-				element: Vector::from_subpaths(core::mem::take(&mut self.glyph_subpaths), false),
-				transform: DAffine2::from_translation(glyph_offset),
-				..Default::default()
-			});
-		} else {
-			for subpath in self.glyph_subpaths.drain(..) {
-				// Unwrapping here is ok because `self.vector_table` is initialized with a single `Vector` table element
-				self.vector_table.get_mut(0).unwrap().element.append_subpath(subpath, false);
-			}
-		}
-	}
-}
-
-impl OutlinePen for PathBuilder {
-	fn move_to(&mut self, x: f32, y: f32) {
-		if !self.current_subpath.is_empty() {
-			self.glyph_subpaths.push(std::mem::replace(&mut self.current_subpath, Subpath::new(Vec::new(), false)));
-		}
-		self.current_subpath.push_manipulator_group(ManipulatorGroup::new_anchor_with_id(self.point(x, y), self.id.next_id()));
-	}
-
-	fn line_to(&mut self, x: f32, y: f32) {
-		self.current_subpath.push_manipulator_group(ManipulatorGroup::new_anchor_with_id(self.point(x, y), self.id.next_id()));
-	}
-
-	fn quad_to(&mut self, x1: f32, y1: f32, x2: f32, y2: f32) {
-		let [handle, anchor] = [self.point(x1, y1), self.point(x2, y2)];
-		self.current_subpath.last_manipulator_group_mut().unwrap().out_handle = Some(handle);
-		self.current_subpath.push_manipulator_group(ManipulatorGroup::new_with_id(anchor, None, None, self.id.next_id()));
-	}
-
-	fn curve_to(&mut self, x1: f32, y1: f32, x2: f32, y2: f32, x3: f32, y3: f32) {
-		let [handle1, handle2, anchor] = [self.point(x1, y1), self.point(x2, y2), self.point(x3, y3)];
-		self.current_subpath.last_manipulator_group_mut().unwrap().out_handle = Some(handle1);
-		self.current_subpath
-			.push_manipulator_group(ManipulatorGroup::new_with_id(anchor, Some(handle2), None, self.id.next_id()));
-	}
-
-	fn close(&mut self) {
-		self.current_subpath.set_closed(true);
-		self.glyph_subpaths.push(std::mem::replace(&mut self.current_subpath, Subpath::new(Vec::new(), false)));
-	}
-}
-
-#[derive(PartialEq, Clone, Copy, Debug, serde::Serialize, serde::Deserialize)]
-pub struct TypesettingConfig {
-	pub font_size: f64,
-	pub line_height_ratio: f64,
-	pub character_spacing: f64,
-	pub max_width: Option<f64>,
-	pub max_height: Option<f64>,
-	pub tilt: f64,
-	pub align: TextAlign,
-}
-
-impl Default for TypesettingConfig {
-	fn default() -> Self {
-		Self {
-			font_size: 24.,
-			line_height_ratio: 1.2,
-			character_spacing: 0.,
-			max_width: None,
-			max_height: None,
-			tilt: 0.,
-			align: TextAlign::default(),
-		}
-	}
-}
-
-fn render_glyph_run(glyph_run: &GlyphRun<'_, ()>, path_builder: &mut PathBuilder, tilt: f64, per_glyph_instances: bool) {
-	let mut run_x = glyph_run.offset();
-	let run_y = glyph_run.baseline();
-
-	let run = glyph_run.run();
-
-	// User-requested tilt applied around baseline to avoid vertical displacement
-	// Translation ensures rotation point is at the baseline, not origin
-	let skew = if per_glyph_instances {
-		DAffine2::from_cols_array(&[1., 0., -tilt.to_radians().tan(), 1., 0., 0.])
-	} else {
-		DAffine2::from_translation(DVec2::new(0., run_y as f64))
-			* DAffine2::from_cols_array(&[1., 0., -tilt.to_radians().tan(), 1., 0., 0.])
-			* DAffine2::from_translation(DVec2::new(0., -run_y as f64))
-	};
-
-	let synthesis = run.synthesis();
-
-	// Font synthesis (e.g., synthetic italic) applied separately from user transforms
-	// This preserves the distinction between font styling and user transformations
-	let style_skew = synthesis.skew().map(|angle| {
-		if per_glyph_instances {
-			DAffine2::from_cols_array(&[1., 0., -angle.to_radians().tan() as f64, 1., 0., 0.])
-		} else {
-			DAffine2::from_translation(DVec2::new(0., run_y as f64))
-				* DAffine2::from_cols_array(&[1., 0., -angle.to_radians().tan() as f64, 1., 0., 0.])
-				* DAffine2::from_translation(DVec2::new(0., -run_y as f64))
-		}
-	});
-
-	let font = run.font();
-	let font_size = run.font_size();
-
-	let normalized_coords = run.normalized_coords().iter().map(|coord| NormalizedCoord::from_bits(*coord)).collect::<Vec<_>>();
-
-	// TODO: This can be cached for better performance
-	let font_collection_ref = font.data.as_ref();
-	let font_ref = ReadFontsRef::from_index(font_collection_ref, font.index).unwrap();
-	let outlines = font_ref.outline_glyphs();
-
-	for glyph in glyph_run.glyphs() {
-		let glyph_offset = DVec2::new((run_x + glyph.x) as f64, (run_y - glyph.y) as f64);
-		run_x += glyph.advance;
-
-		let glyph_id = GlyphId::from(glyph.id);
-		if let Some(glyph_outline) = outlines.get(glyph_id) {
-			if !per_glyph_instances {
-				path_builder.origin = glyph_offset;
-			}
-			path_builder.draw_glyph(&glyph_outline, font_size, &normalized_coords, glyph_offset, style_skew, skew, per_glyph_instances);
-		}
-	}
-}
-
-fn layout_text(str: &str, font_data: Option<Blob<u8>>, typesetting: TypesettingConfig) -> Option<Layout<()>> {
-	FONT_CONTEXT.with_borrow_mut(|mut font_cx| {
-		LAYOUT_CONTEXT.with_borrow_mut(|layout_cx| {
-			let (font_family, font_info) = font_data.and_then(|font_data| {
-				let families = font_cx.collection.register_fonts(font_data, None);
-
-				families.first().and_then(|(family_id, fonts_info)| {
-					fonts_info
-						.first()
-						.and_then(|font_info| font_cx.collection.family_name(*family_id).map(|f| (f.to_string(), font_info.clone())))
-				})
-			})?;
-
-			const DISPLAY_SCALE: f32 = 1.;
-			let mut builder = layout_cx.ranged_builder(&mut font_cx, str, DISPLAY_SCALE, false);
-
-			builder.push_default(StyleProperty::FontSize(typesetting.font_size as f32));
-			builder.push_default(StyleProperty::LetterSpacing(typesetting.character_spacing as f32));
-			builder.push_default(StyleProperty::FontStack(parley::FontStack::Single(parley::FontFamily::Named(std::borrow::Cow::Owned(font_family)))));
-			builder.push_default(StyleProperty::FontWeight(font_info.weight()));
-			builder.push_default(StyleProperty::FontStyle(font_info.style()));
-			builder.push_default(StyleProperty::FontWidth(font_info.width()));
-			builder.push_default(LineHeight::FontSizeRelative(typesetting.line_height_ratio as f32));
-
-			let mut layout: Layout<()> = builder.build(str);
-
-			layout.break_all_lines(typesetting.max_width.map(|mw| mw as f32));
-			layout.align(typesetting.max_width.map(|max_w| max_w as f32), typesetting.align.into(), AlignmentOptions::default());
-
-			Some(layout)
-		})
-	})
-}
-
-pub fn to_path(str: &str, font_data: Option<Blob<u8>>, typesetting: TypesettingConfig, per_glyph_instances: bool) -> Table<Vector> {
-	let Some(layout) = layout_text(str, font_data, typesetting) else {
-		return Table::new_from_element(Vector::default());
-	};
-
-	let mut path_builder = PathBuilder {
-		current_subpath: Subpath::new(Vec::new(), false),
-		glyph_subpaths: Vec::new(),
-		vector_table: if per_glyph_instances { Table::new() } else { Table::new_from_element(Vector::default()) },
-		scale: layout.scale() as f64,
-		id: PointId::ZERO,
-		origin: DVec2::default(),
-	};
-
-	for line in layout.lines() {
-		for item in line.items() {
-			if let PositionedLayoutItem::GlyphRun(glyph_run) = item {
-				render_glyph_run(&glyph_run, &mut path_builder, typesetting.tilt, per_glyph_instances);
-			}
-		}
-	}
-
-	if path_builder.vector_table.is_empty() {
-		path_builder.vector_table = Table::new_from_element(Vector::default());
-	}
-
-	path_builder.vector_table
-}
-
-pub fn bounding_box(str: &str, font_data: Option<Blob<u8>>, typesetting: TypesettingConfig, for_clipping_test: bool) -> DVec2 {
-	if !for_clipping_test {
-		if let (Some(max_height), Some(max_width)) = (typesetting.max_height, typesetting.max_width) {
-			return DVec2::new(max_width, max_height);
-		}
-	}
-
-	let Some(layout) = layout_text(str, font_data, typesetting) else { return DVec2::ZERO };
-
-	DVec2::new(layout.full_width() as f64, layout.height() as f64)
+pub fn bounding_box(text: &str, font: &Font, font_cache: &FontCache, typesetting: TypesettingConfig, for_clipping_test: bool) -> DVec2 {
+	TextContext::with_thread_local(|ctx| ctx.bounding_box(text, font, font_cache, typesetting, for_clipping_test))
 }
 
 pub fn load_font(data: &[u8]) -> Blob<u8> {
 	Blob::new(Arc::new(data.to_vec()))
 }
 
-pub fn lines_clipping(str: &str, font_data: Option<Blob<u8>>, typesetting: TypesettingConfig) -> bool {
-	let Some(max_height) = typesetting.max_height else { return false };
-	let bounds = bounding_box(str, font_data, typesetting, true);
-	max_height < bounds.y
+pub fn lines_clipping(text: &str, font: &Font, font_cache: &FontCache, typesetting: TypesettingConfig) -> bool {
+	TextContext::with_thread_local(|ctx| ctx.lines_clipping(text, font, font_cache, typesetting))
 }

node-graph/gstd/src/text.rs

@@ -38,7 +38,5 @@ fn text<'i: 'n>(
 		align,
 	};
 
-	let font_data = editor.font_cache.get(&font_name).map(|f| load_font(f));
-
-	to_path(&text, font_data, typesetting, per_glyph_instances)
+	to_path(&text, &font_name, &editor.font_cache, typesetting, per_glyph_instances)
 }