Break out mod paint into new crate epaint

CHANGELOG.md

@@ -19,6 +19,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 * Tweak size and alignment of some emojis to match other text.
 * Rename `PaintCmd` to `Shape`.
 * Rename feature "serde" to "persistence".
+* Break out the modules `math` and `paint` into separate crates `emath` and `epaint`.
 
 ### Fixed 🐛
 

Cargo.lock

@@ -640,11 +640,7 @@ dependencies = [
 name = "egui"
 version = "0.7.0"
 dependencies = [
- "ahash",
- "atomic_refcell",
- "emath",
- "parking_lot",
- "rusttype",
+ "epaint",
  "serde",
 ]
 
@@ -711,6 +707,18 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "epaint"
+version = "0.7.0"
+dependencies = [
+ "ahash",
+ "atomic_refcell",
+ "emath",
+ "parking_lot",
+ "rusttype",
+ "serde",
+]
+
 [[package]]
 name = "epi"
 version = "0.7.0"

Cargo.toml

@@ -6,6 +6,7 @@ members = [
     "egui_web",
     "egui",
     "emath",
+    "epaint",
     "epi",
 ]
 

check.sh

@@ -6,7 +6,7 @@ cargo check --workspace --all-targets --all-features
 cargo check -p egui_demo_app --lib --target wasm32-unknown-unknown
 cargo check -p egui_demo_app --lib --target wasm32-unknown-unknown --all-features
 cargo fmt --all -- --check
-CARGO_INCREMENTAL=0 cargo clippy --workspace --all-targets --all-features --  -D warnings -W clippy::all #-W clippy::pedantic -W clippy::restriction -W clippy::nursery
+CARGO_INCREMENTAL=0 cargo clippy --workspace --all-targets --all-features --  -D warnings -W clippy::all
 cargo test --workspace --all-targets --all-features
 cargo test --workspace --doc
 

egui/Cargo.toml

@@ -13,27 +13,22 @@ keywords = ["gui", "imgui", "immediate", "portable", "gamedev"]
 include = [
   "**/*.rs",
   "Cargo.toml",
-  "fonts/*.ttf",
 ]
 
 [lib]
 
 [dependencies]
-emath = { path = "../emath" }
-
-ahash = { version = "0.6", features = ["std"], default-features = false }
-atomic_refcell = { version = "0.1", optional = true } # Used instead of parking_lot when you are always using Egui in a single thread. About as fast as parking_lot. Panics on multi-threaded use of egui::Context.
-parking_lot = { version = "0.11", optional = true } # Using parking_lot over std::sync::Mutex gives 50% speedups in some real-world scenarios
-rusttype = "0.9"
+epaint = { path = "../epaint", default-features = false }
 serde = { version = "1", features = ["derive", "rc"], optional = true }
 
 [features]
-default = ["atomic_refcell", "default_fonts"]
-persistence = ["serde", "emath/serde"]
+default = ["default_fonts", "single_threaded"]
+persistence = ["serde", "epaint/persistence"]
 
 # If set, egui will use `include_bytes!` to bundle some fonts.
 # If you plan on specifying your own fonts you may disable this feature.
-default_fonts = []
+default_fonts = ["epaint/default_fonts"]
 
 # Only needed if you plan to use the same egui::Context from multiple threads.
-multi_threaded = ["parking_lot"]
+single_threaded = ["epaint/single_threaded"]
+multi_threaded = ["epaint/multi_threaded"]

egui/src/context.rs

@@ -871,24 +871,3 @@ impl Context {
         self.set_style(style);
     }
 }
-
-impl paint::TessellationOptions {
-    pub fn ui(&mut self, ui: &mut Ui) {
-        let Self {
-            aa_size: _,
-            anti_alias,
-            coarse_tessellation_culling,
-            debug_paint_clip_rects,
-            debug_paint_text_rects,
-            debug_ignore_clip_rects,
-        } = self;
-        ui.checkbox(anti_alias, "Antialias");
-        ui.checkbox(
-            coarse_tessellation_culling,
-            "Do coarse culling in the tessellator",
-        );
-        ui.checkbox(debug_ignore_clip_rects, "Ignore clip rectangles (debug)");
-        ui.checkbox(debug_paint_clip_rects, "Paint clip rectangles (debug)");
-        ui.checkbox(debug_paint_text_rects, "Paint text bounds (debug)");
-    }
-}

egui/src/introspection.rs

@@ -1,69 +1,145 @@
 //! uis for egui types.
-use crate::{
-    paint::{self, Shape, Texture, Triangles},
-    *,
-};
+use crate::*;
 
-impl Texture {
-    pub fn ui(&self, ui: &mut Ui) {
-        // Show font texture in demo Ui
-        ui.label(format!(
-            "Texture size: {} x {} (hover to zoom)",
-            self.width, self.height
-        ));
-        if self.width <= 1 || self.height <= 1 {
-            return;
-        }
-        let mut size = vec2(self.width as f32, self.height as f32);
-        if size.x > ui.available_width() {
-            size *= ui.available_width() / size.x;
-        }
-        let (rect, response) = ui.allocate_at_least(size, Sense::hover());
-        let mut triangles = Triangles::default();
-        triangles.add_rect_with_uv(
-            rect,
-            [pos2(0.0, 0.0), pos2(1.0, 1.0)].into(),
-            Color32::WHITE,
-        );
-        ui.painter().add(Shape::triangles(triangles));
+impl Widget for &epaint::Texture {
+    fn ui(self, ui: &mut Ui) -> Response {
+        use epaint::Triangles;
 
-        let (tex_w, tex_h) = (self.width as f32, self.height as f32);
-
-        response.on_hover_ui(|ui| {
-            let pos = ui
-                .input()
-                .mouse
-                .pos
-                .unwrap_or_else(|| ui.min_rect().left_top());
-            let (_id, zoom_rect) = ui.allocate_space(vec2(128.0, 128.0));
-            let u = remap_clamp(pos.x, rect.x_range(), 0.0..=tex_w);
-            let v = remap_clamp(pos.y, rect.y_range(), 0.0..=tex_h);
-
-            let texel_radius = 32.0;
-            let u = u.at_least(texel_radius).at_most(tex_w - texel_radius);
-            let v = v.at_least(texel_radius).at_most(tex_h - texel_radius);
-
-            let uv_rect = Rect::from_min_max(
-                pos2((u - texel_radius) / tex_w, (v - texel_radius) / tex_h),
-                pos2((u + texel_radius) / tex_w, (v + texel_radius) / tex_h),
-            );
+        ui.vertical(|ui| {
+            // Show font texture in demo Ui
+            ui.label(format!(
+                "Texture size: {} x {} (hover to zoom)",
+                self.width, self.height
+            ));
+            if self.width <= 1 || self.height <= 1 {
+                return;
+            }
+            let mut size = vec2(self.width as f32, self.height as f32);
+            if size.x > ui.available_width() {
+                size *= ui.available_width() / size.x;
+            }
+            let (rect, response) = ui.allocate_at_least(size, Sense::hover());
             let mut triangles = Triangles::default();
-            triangles.add_rect_with_uv(zoom_rect, uv_rect, Color32::WHITE);
+            triangles.add_rect_with_uv(
+                rect,
+                [pos2(0.0, 0.0), pos2(1.0, 1.0)].into(),
+                Color32::WHITE,
+            );
             ui.painter().add(Shape::triangles(triangles));
-        });
+
+            let (tex_w, tex_h) = (self.width as f32, self.height as f32);
+
+            response.on_hover_ui(|ui| {
+                let pos = ui
+                    .input()
+                    .mouse
+                    .pos
+                    .unwrap_or_else(|| ui.min_rect().left_top());
+                let (_id, zoom_rect) = ui.allocate_space(vec2(128.0, 128.0));
+                let u = remap_clamp(pos.x, rect.x_range(), 0.0..=tex_w);
+                let v = remap_clamp(pos.y, rect.y_range(), 0.0..=tex_h);
+
+                let texel_radius = 32.0;
+                let u = u.at_least(texel_radius).at_most(tex_w - texel_radius);
+                let v = v.at_least(texel_radius).at_most(tex_h - texel_radius);
+
+                let uv_rect = Rect::from_min_max(
+                    pos2((u - texel_radius) / tex_w, (v - texel_radius) / tex_h),
+                    pos2((u + texel_radius) / tex_w, (v + texel_radius) / tex_h),
+                );
+                let mut triangles = Triangles::default();
+                triangles.add_rect_with_uv(zoom_rect, uv_rect, Color32::WHITE);
+                ui.painter().add(Shape::triangles(triangles));
+            });
+        })
+        .1
     }
 }
 
-impl paint::text::FontDefinitions {
-    pub fn ui(&mut self, ui: &mut Ui) {
-        for (text_style, (_family, size)) in self.family_and_size.iter_mut() {
-            // TODO: radio button for family
-            ui.add(
-                Slider::f32(size, 4.0..=40.0)
-                    .max_decimals(0)
-                    .text(format!("{:?}", text_style)),
-            );
-        }
-        crate::reset_button(ui, self);
+impl Widget for &mut epaint::text::FontDefinitions {
+    fn ui(self, ui: &mut Ui) -> Response {
+        ui.vertical(|ui| {
+            for (text_style, (_family, size)) in self.family_and_size.iter_mut() {
+                // TODO: radio button for family
+                ui.add(
+                    Slider::f32(size, 4.0..=40.0)
+                        .max_decimals(0)
+                        .text(format!("{:?}", text_style)),
+                );
+            }
+            crate::reset_button(ui, self);
+        })
+        .1
+    }
+}
+
+impl Widget for &epaint::stats::PaintStats {
+    fn ui(self, ui: &mut Ui) -> Response {
+        ui.vertical(|ui| {
+            ui.label(
+                "Egui generates intermediate level shapes like circles and text. \
+            These are later tessellated into triangles.",
+            );
+            ui.advance_cursor(10.0);
+
+            ui.style_mut().body_text_style = TextStyle::Monospace;
+
+            let epaint::stats::PaintStats {
+                shapes,
+                shape_text,
+                shape_path,
+                shape_mesh,
+                shape_vec,
+                jobs,
+                vertices,
+                indices,
+            } = self;
+
+            ui.label("Intermediate:");
+            label(ui, shapes, "shapes").on_hover_text("Boxes, circles, etc");
+            label(ui, shape_text, "text");
+            label(ui, shape_path, "paths");
+            label(ui, shape_mesh, "meshes");
+            label(ui, shape_vec, "nested");
+            ui.advance_cursor(10.0);
+
+            ui.label("Tessellated:");
+            label(ui, jobs, "jobs").on_hover_text("Number of separate clip rectangles");
+            label(ui, vertices, "vertices");
+            label(ui, indices, "indices").on_hover_text("Three 32-bit indices per triangles");
+            ui.advance_cursor(10.0);
+
+            // ui.label("Total:");
+            // ui.label(self.total().format(""));
+        })
+        .1
+    }
+}
+
+pub fn label(ui: &mut Ui, alloc_info: &epaint::stats::AllocInfo, what: &str) -> Response {
+    ui.add(Label::new(alloc_info.format(what)).multiline(false))
+}
+
+impl Widget for &mut epaint::TessellationOptions {
+    fn ui(self, ui: &mut Ui) -> Response {
+        ui.vertical(|ui| {
+            let epaint::TessellationOptions {
+                aa_size: _,
+                anti_alias,
+                coarse_tessellation_culling,
+                debug_paint_clip_rects,
+                debug_paint_text_rects,
+                debug_ignore_clip_rects,
+            } = self;
+            ui.checkbox(anti_alias, "Antialias");
+            ui.checkbox(
+                coarse_tessellation_culling,
+                "Do coarse culling in the tessellator",
+            );
+            ui.checkbox(debug_ignore_clip_rects, "Ignore clip rectangles (debug)");
+            ui.checkbox(debug_paint_clip_rects, "Paint clip rectangles (debug)");
+            ui.checkbox(debug_paint_text_rects, "Paint text bounds (debug)");
+        })
+        .1
     }
 }

egui/src/layers.rs

@@ -1,4 +1,4 @@
-use ahash::AHashMap;
+use epaint::ahash::AHashMap;
 
 use crate::{math::Rect, paint::Shape, Id, *};
 

egui/src/lib.rs

@@ -88,7 +88,6 @@ mod layers;
 mod layout;
 mod memory;
 pub mod menu;
-pub mod paint;
 mod painter;
 pub mod style;
 mod types;
@@ -97,6 +96,17 @@ pub mod util;
 pub mod widgets;
 
 pub use emath as math;
+pub use epaint as paint;
+pub use epaint::emath;
+
+pub use emath::{
+    clamp, lerp, pos2, remap, remap_clamp, vec2, Align, Align2, NumExt, Pos2, Rect, Vec2,
+};
+pub use epaint::{
+    color, mutex,
+    text::{FontDefinitions, FontFamily, TextStyle},
+    Color32, PaintJobs, Rgba, Shape, Stroke, Texture, TextureId,
+};
 
 pub use {
     containers::*,
@@ -105,18 +115,11 @@ pub use {
     input::*,
     layers::*,
     layout::*,
-    math::{clamp, lerp, pos2, remap, remap_clamp, vec2, Align, Align2, NumExt, Pos2, Rect, Vec2},
     memory::Memory,
-    paint::{
-        color,
-        text::{FontDefinitions, FontFamily, TextStyle},
-        Color32, PaintJobs, Rgba, Shape, Stroke, Texture, TextureId,
-    },
     painter::Painter,
     style::Style,
     types::*,
     ui::Ui,
-    util::mutex,
     widgets::*,
 };
 

egui/src/memory.rs

@@ -178,7 +178,7 @@ impl Memory {
         }
     }
 
-    pub(crate) fn end_frame(&mut self, used_ids: &ahash::AHashMap<Id, Pos2>) {
+    pub(crate) fn end_frame(&mut self, used_ids: &epaint::ahash::AHashMap<Id, Pos2>) {
         self.areas.end_frame();
 
         if let Some(kb_focus_id) = self.interaction.kb_focus_id {

egui/src/style.rs

@@ -448,7 +448,7 @@ impl Selection {
         let Self { bg_fill, stroke } = self;
 
         ui_color(ui, bg_fill, "bg_fill");
-        stroke.ui(ui, "stroke");
+        stroke_ui(ui, stroke, "stroke");
     }
 }
 
@@ -463,10 +463,10 @@ impl WidgetVisuals {
         } = self;
 
         ui_color(ui, bg_fill, "bg_fill");
-        bg_stroke.ui(ui, "bg_stroke");
+        stroke_ui(ui, bg_stroke, "bg_stroke");
         ui.add(Slider::f32(corner_radius, 0.0..=10.0).text("corner_radius"));
         ui_color(ui, fg_fill, "fg_fill");
-        fg_stroke.ui(ui, "fg_stroke (text)");
+        stroke_ui(ui, fg_stroke, "fg_stroke (text)");
     }
 }
 
@@ -495,7 +495,7 @@ impl Visuals {
         ui_color(ui, dark_bg_color, "dark_bg_color");
         ui_color(ui, hyperlink_color, "hyperlink_color");
         ui.add(Slider::f32(window_corner_radius, 0.0..=20.0).text("window_corner_radius"));
-        window_shadow.ui(ui, "Window shadow:");
+        shadow_ui(ui, window_shadow, "Window shadow:");
         ui.add(Slider::f32(resize_corner_size, 0.0..=20.0).text("resize_corner_size"));
         ui.add(Slider::f32(text_cursor_width, 0.0..=2.0).text("text_cursor_width"));
         ui.add(Slider::f32(clip_rect_margin, 0.0..=20.0).text("clip_rect_margin"));
@@ -513,36 +513,6 @@ impl Visuals {
     }
 }
 
-impl Stroke {
-    pub fn ui(&mut self, ui: &mut crate::Ui, text: &str) {
-        let Self { width, color } = self;
-        ui.horizontal(|ui| {
-            ui.add(DragValue::f32(width).speed(0.1).range(0.0..=5.0))
-                .on_hover_text("Width");
-            ui.color_edit_button_srgba(color);
-            ui.label(text);
-
-            // stroke preview:
-            let (_id, stroke_rect) = ui.allocate_space(ui.style().spacing.interact_size);
-            let left = stroke_rect.left_center();
-            let right = stroke_rect.right_center();
-            ui.painter().line_segment([left, right], (*width, *color));
-        });
-    }
-}
-
-impl Shadow {
-    pub fn ui(&mut self, ui: &mut crate::Ui, text: &str) {
-        let Self { extrusion, color } = self;
-        ui.horizontal(|ui| {
-            ui.label(text);
-            ui.add(DragValue::f32(extrusion).speed(1.0).range(0.0..=100.0))
-                .on_hover_text("Extrusion");
-            ui.color_edit_button_srgba(color);
-        });
-    }
-}
-
 // TODO: improve and standardize ui_slider_vec2
 fn ui_slider_vec2(
     ui: &mut Ui,

egui/src/ui.rs

@@ -3,13 +3,7 @@
 use std::{hash::Hash, sync::Arc};
 
 use crate::{
-    color::*,
-    containers::*,
-    layout::*,
-    mutex::MutexGuard,
-    paint::{text::Fonts, *},
-    widgets::*,
-    *,
+    color::*, containers::*, layout::*, mutex::MutexGuard, paint::text::Fonts, widgets::*, *,
 };
 
 /// This is what you use to place widgets.
@@ -874,9 +868,9 @@ impl Ui {
     /// If the user clicks the button, a full color picker is shown.
     /// The given color is in `sRGBA` space with premultiplied alpha
     pub fn color_edit_button_srgba_premultiplied(&mut self, srgba: &mut [u8; 4]) -> Response {
-        let mut color = Color32(*srgba);
+        let mut color = Color32::from_rgba_premultiplied(srgba[0], srgba[1], srgba[2], srgba[3]);
         let response = self.color_edit_button_srgba(&mut color);
-        *srgba = color.0;
+        *srgba = color.to_array();
         response
     }
 

egui/src/util/mod.rs

@@ -2,7 +2,6 @@
 
 pub(crate) mod cache;
 mod history;
-pub mod mutex;
 pub mod undoer;
 
 pub(crate) use cache::Cache;

egui/src/widgets/drag_value.rs

@@ -2,7 +2,7 @@
 
 use std::ops::RangeInclusive;
 
-use crate::{paint::*, *};
+use crate::*;
 
 /// Combined into one function (rather than two) to make it easier
 /// for the borrow checker.

egui/src/widgets/mod.rs

@@ -44,3 +44,31 @@ pub fn reset_button<T: Default + PartialEq>(ui: &mut Ui, value: &mut T) {
         *value = def;
     }
 }
+
+// ----------------------------------------------------------------------------
+
+pub fn stroke_ui(ui: &mut crate::Ui, stroke: &mut epaint::Stroke, text: &str) {
+    let epaint::Stroke { width, color } = stroke;
+    ui.horizontal(|ui| {
+        ui.add(DragValue::f32(width).speed(0.1).range(0.0..=5.0))
+            .on_hover_text("Width");
+        ui.color_edit_button_srgba(color);
+        ui.label(text);
+
+        // stroke preview:
+        let (_id, stroke_rect) = ui.allocate_space(ui.style().spacing.interact_size);
+        let left = stroke_rect.left_center();
+        let right = stroke_rect.right_center();
+        ui.painter().line_segment([left, right], (*width, *color));
+    });
+}
+
+pub(crate) fn shadow_ui(ui: &mut Ui, shadow: &mut epaint::Shadow, text: &str) {
+    let epaint::Shadow { extrusion, color } = shadow;
+    ui.horizontal(|ui| {
+        ui.label(text);
+        ui.add(DragValue::f32(extrusion).speed(1.0).range(0.0..=100.0))
+            .on_hover_text("Extrusion");
+        ui.color_edit_button_srgba(color);
+    });
+}

egui/src/widgets/slider.rs

@@ -2,7 +2,7 @@
 
 use std::ops::RangeInclusive;
 
-use crate::{paint::*, widgets::Label, *};
+use crate::{widgets::Label, *};
 
 // ----------------------------------------------------------------------------
 

egui_demo_lib/src/apps/demo/painting.rs

@@ -19,7 +19,7 @@ impl Default for Painting {
 impl Painting {
     pub fn ui_control(&mut self, ui: &mut Ui) {
         ui.horizontal(|ui| {
-            self.stroke.ui(ui, "Stroke");
+            egui::stroke_ui(ui, &mut self.stroke, "Stroke");
             ui.separator();
             if ui.button("Clear Painting").clicked {
                 self.lines.clear();

epaint/Cargo.toml

@@ -0,0 +1,41 @@
+[package]
+name = "epaint"
+version = "0.7.0"
+authors = ["Emil Ernerfeldt <emil.ernerfeldt@gmail.com>"]
+description = "Minimal 2D graphics library for GUI work"
+edition = "2018"
+homepage = "https://github.com/emilk/egui"
+license = "MIT OR Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/emilk/egui"
+categories = ["gui", "graphics"]
+keywords = ["gui", "graphics"]
+include = [
+  "**/*.rs",
+  "Cargo.toml",
+  "fonts/*.ttf",
+]
+
+[lib]
+
+[dependencies]
+emath = { path = "../emath" }
+
+ahash = { version = "0.6", features = ["std"], default-features = false }
+atomic_refcell = { version = "0.1", optional = true } # Used instead of parking_lot when you are always using epaint in a single thread. About as fast as parking_lot. Panics on multi-threaded use.
+parking_lot = { version = "0.11", optional = true } # Using parking_lot over std::sync::Mutex gives 50% speedups in some real-world scenarios.
+rusttype = "0.9"
+serde = { version = "1", features = ["derive"], optional = true }
+
+[features]
+default = ["multi_threaded", "default_fonts"]
+persistence = ["serde", "emath/serde"]
+
+# If set, epaint will use `include_bytes!` to bundle some fonts.
+# If you plan on specifying your own fonts you may disable this feature.
+default_fonts = []
+
+single_threaded = ["atomic_refcell"]
+
+# Only needed if you plan to use the same fonts from multiple threads.
+multi_threaded = ["parking_lot"]

epaint/README.md

@@ -0,0 +1,5 @@
+# epaint - Egui Paint Library
+
+A bare-bones 2D graphics library for turning simple 2D shapes and text into textured triangles.
+
+Made for [`egui`](https://github.com/emilk/egui/).

epaint/src/color.rs

@@ -1,4 +1,4 @@
-use crate::math::clamp;
+use emath::clamp;
 
 /// This format is used for space-efficient color representation (32 bits).
 ///

epaint/src/lib.rs

@@ -1,6 +1,51 @@
 //! 2D graphics/rendering. Fonts, textures, color, geometry, tessellation etc.
 
+#![cfg_attr(not(debug_assertions), deny(warnings))] // Forbid warnings in release builds
+#![forbid(unsafe_code)]
+#![warn(
+    clippy::all,
+    clippy::await_holding_lock,
+    clippy::dbg_macro,
+    clippy::doc_markdown,
+    clippy::empty_enum,
+    clippy::enum_glob_use,
+    clippy::exit,
+    clippy::filter_map_next,
+    clippy::fn_params_excessive_bools,
+    clippy::if_let_mutex,
+    clippy::imprecise_flops,
+    clippy::inefficient_to_string,
+    clippy::linkedlist,
+    clippy::lossy_float_literal,
+    clippy::macro_use_imports,
+    clippy::match_on_vec_items,
+    clippy::match_wildcard_for_single_variants,
+    clippy::mem_forget,
+    clippy::mismatched_target_os,
+    clippy::missing_errors_doc,
+    clippy::missing_safety_doc,
+    clippy::needless_borrow,
+    clippy::needless_continue,
+    clippy::needless_pass_by_value,
+    clippy::option_option,
+    clippy::pub_enum_variant_names,
+    clippy::rest_pat_in_fully_bound_structs,
+    clippy::todo,
+    clippy::unimplemented,
+    clippy::unnested_or_patterns,
+    clippy::verbose_file_reads,
+    future_incompatible,
+    missing_crate_level_docs,
+    missing_doc_code_examples,
+    // missing_docs,
+    nonstandard_style,
+    rust_2018_idioms,
+    unused_doc_comments,
+)]
+#![allow(clippy::manual_range_contains)]
+
 pub mod color;
+pub mod mutex;
 mod shadow;
 pub mod shape;
 pub mod stats;
@@ -22,11 +67,14 @@ pub use {
     triangles::{Triangles, Vertex},
 };
 
+pub use ahash;
+pub use emath;
+
 /// The UV coordinate of a white region of the texture mesh.
 /// The default Egui texture has the top-left corner pixel fully white.
 /// You need need use a clamping texture sampler for this to work
 /// (so it doesn't do bilinear blending with bottom right corner).
-pub const WHITE_UV: crate::Pos2 = crate::pos2(0.0, 0.0);
+pub const WHITE_UV: emath::Pos2 = emath::pos2(0.0, 0.0);
 
 /// What texture to use in a [`Triangles`] mesh.
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
@@ -47,7 +95,7 @@ impl Default for TextureId {
 }
 
 pub(crate) struct PaintRect {
-    pub rect: crate::Rect,
+    pub rect: emath::Rect,
     /// How rounded the corners are. Use `0.0` for no rounding.
     pub corner_radius: f32,
     pub fill: Color32,

epaint/src/mutex.rs

@@ -1,6 +1,6 @@
 //! Helper module that wraps some Mutex types with different implementations.
-//! By default, Egui Mutexes will panic when used in a multi-threaded environment.
-//! To use the same [`crate::Context`] from different threads, enable the `multi_threaded` feature.
+//!
+//! When the `single_threaded` feature is on the mutexes will panic when locked from different threads.
 
 // ----------------------------------------------------------------------------
 

epaint/src/shadow.rs

@@ -25,12 +25,12 @@ impl Shadow {
         }
     }
 
-    pub fn tessellate(&self, rect: crate::Rect, corner_radius: f32) -> Triangles {
+    pub fn tessellate(&self, rect: emath::Rect, corner_radius: f32) -> Triangles {
         // tessellator.clip_rect = clip_rect; // TODO: culling
 
         let Self { extrusion, color } = *self;
 
-        use crate::paint::tessellator::*;
+        use crate::tessellator::*;
         let rect = PaintRect {
             rect: rect.expand(0.5 * extrusion),
             corner_radius: corner_radius + 0.5 * extrusion,

epaint/src/shape.rs

@@ -1,10 +1,8 @@
-use {
-    super::{
-        text::{Fonts, Galley, TextStyle},
-        Color32, Triangles,
-    },
-    crate::*,
+use crate::{
+    text::{Fonts, Galley, TextStyle},
+    Color32, Stroke, Triangles,
 };
+use emath::*;
 
 /// A paint primitive such as a circle or a piece of text.
 /// Coordinates are all screen space points (not physical pixels).

epaint/src/stats.rs

@@ -1,4 +1,4 @@
-use crate::{paint::*, Rect};
+use {crate::*, emath::*};
 
 #[derive(Clone, Copy, PartialEq)]
 enum ElementSize {
@@ -129,24 +129,20 @@ impl AllocInfo {
             )
         }
     }
-
-    pub fn label(&self, ui: &mut crate::Ui, what: &str) -> crate::Response {
-        ui.add(crate::Label::new(self.format(what)).multiline(false))
-    }
 }
 
 #[derive(Clone, Copy, Default)]
 pub struct PaintStats {
-    shapes: AllocInfo,
-    shape_text: AllocInfo,
-    shape_path: AllocInfo,
-    shape_mesh: AllocInfo,
-    shape_vec: AllocInfo,
+    pub shapes: AllocInfo,
+    pub shape_text: AllocInfo,
+    pub shape_path: AllocInfo,
+    pub shape_mesh: AllocInfo,
+    pub shape_vec: AllocInfo,
 
     /// Number of separate clip rectangles
-    jobs: AllocInfo,
-    vertices: AllocInfo,
-    indices: AllocInfo,
+    pub jobs: AllocInfo,
+    pub vertices: AllocInfo,
+    pub indices: AllocInfo,
 }
 
 impl PaintStats {
@@ -187,7 +183,7 @@ impl PaintStats {
         }
     }
 
-    pub fn with_paint_jobs(mut self, paint_jobs: &[crate::paint::PaintJob]) -> Self {
+    pub fn with_paint_jobs(mut self, paint_jobs: &[crate::PaintJob]) -> Self {
         self.jobs += AllocInfo::from_slice(paint_jobs);
         for (_, indices) in paint_jobs {
             self.vertices += AllocInfo::from_slice(&indices.vertices);
@@ -207,51 +203,6 @@ impl PaintStats {
     // }
 }
 
-impl PaintStats {
-    pub fn ui(&self, ui: &mut crate::Ui) {
-        ui.label(
-            "Egui generates intermediate level shapes like circles and text. \
-            These are later tessellated into triangles.",
-        );
-        ui.advance_cursor(10.0);
-
-        ui.style_mut().body_text_style = TextStyle::Monospace;
-
-        let Self {
-            shapes,
-            shape_text,
-            shape_path,
-            shape_mesh,
-            shape_vec,
-            jobs,
-            vertices,
-            indices,
-        } = self;
-
-        ui.label("Intermediate:");
-        shapes
-            .label(ui, "shapes")
-            .on_hover_text("Boxes, circles, etc");
-        shape_text.label(ui, "text");
-        shape_path.label(ui, "paths");
-        shape_mesh.label(ui, "meshes");
-        shape_vec.label(ui, "nested");
-        ui.advance_cursor(10.0);
-
-        ui.label("Tessellated:");
-        jobs.label(ui, "jobs")
-            .on_hover_text("Number of separate clip rectangles");
-        vertices.label(ui, "vertices");
-        indices
-            .label(ui, "indices")
-            .on_hover_text("Three 32-bit indices per triangles");
-        ui.advance_cursor(10.0);
-
-        // ui.label("Total:");
-        // ui.label(self.total().format(""));
-    }
-}
-
 fn megabytes(size: usize) -> String {
     format!("{:.2} MB", size as f64 / 1e6)
 }

epaint/src/tessellator.rs

@@ -5,11 +5,9 @@
 
 #![allow(clippy::identity_op)]
 
-use {
-    super::{text::Fonts, *},
-    crate::math::*,
-    std::f32::consts::TAU,
-};
+use crate::{text::Fonts, *};
+use emath::*;
+use std::f32::consts::TAU;
 
 /// A clip triangle and some textured triangles.
 pub type PaintJob = (Rect, Triangles);
@@ -133,7 +131,7 @@ impl Path {
     }
 }
 
-pub(crate) mod path {
+pub mod path {
     //! Helpers for constructing paths
     use super::*;
 

epaint/src/text/font.rs

@@ -6,13 +6,11 @@ use {
 };
 
 use crate::{
-    math::{vec2, Vec2},
     mutex::{Mutex, RwLock},
-    paint::{
-        text::galley::{Galley, Row},
-        TextureAtlas,
-    },
+    text::galley::{Galley, Row},
+    TextureAtlas,
 };
+use emath::{vec2, Vec2};
 
 // ----------------------------------------------------------------------------
 

epaint/src/text/fonts.rs

@@ -4,9 +4,11 @@ use std::{
     sync::Arc,
 };
 
-use super::font::{Font, FontImpl};
-use crate::mutex::Mutex;
-use crate::paint::{Texture, TextureAtlas};
+use crate::{
+    mutex::Mutex,
+    text::font::{Font, FontImpl},
+    Texture, TextureAtlas,
+};
 
 // TODO: rename
 /// One of a few categories of styles of text, e.g. body, button or heading.
@@ -68,7 +70,7 @@ fn rusttype_font_from_font_data(name: &str, data: &FontData) -> rusttype::Font<'
 ///
 /// Often you would start with [`FontDefinitions::default()`] and then add/change the contents.
 ///
-/// ```
+/// ``` ignore
 /// # let mut ctx = egui::CtxRef::default();
 /// let mut fonts = egui::FontDefinitions::default();
 /// // Large button text:
@@ -115,22 +117,22 @@ impl Default for FontDefinitions {
             // Use size 13 for this. NOTHING ELSE:
             font_data.insert(
                 "ProggyClean".to_owned(),
-                std::borrow::Cow::Borrowed(include_bytes!("../../../fonts/ProggyClean.ttf")),
+                std::borrow::Cow::Borrowed(include_bytes!("../../fonts/ProggyClean.ttf")),
             );
             font_data.insert(
                 "Ubuntu-Light".to_owned(),
-                std::borrow::Cow::Borrowed(include_bytes!("../../../fonts/Ubuntu-Light.ttf")),
+                std::borrow::Cow::Borrowed(include_bytes!("../../fonts/Ubuntu-Light.ttf")),
             );
 
             // Some good looking emojis. Use as first priority:
             font_data.insert(
                 "NotoEmoji-Regular".to_owned(),
-                std::borrow::Cow::Borrowed(include_bytes!("../../../fonts/NotoEmoji-Regular.ttf")),
+                std::borrow::Cow::Borrowed(include_bytes!("../../fonts/NotoEmoji-Regular.ttf")),
             );
             // Bigger emojis, and more. <http://jslegers.github.io/emoji-icon-font/>:
             font_data.insert(
                 "emoji-icon-font".to_owned(),
-                std::borrow::Cow::Borrowed(include_bytes!("../../../fonts/emoji-icon-font.ttf")),
+                std::borrow::Cow::Borrowed(include_bytes!("../../fonts/emoji-icon-font.ttf")),
             );
 
             fonts_for_family.insert(

epaint/src/text/galley.rs

@@ -20,7 +20,7 @@
 //! [`CCursor::prefer_next_row`] etc selects which.
 
 use super::cursor::*;
-use crate::math::{pos2, NumExt, Rect, Vec2};
+use emath::{pos2, NumExt, Rect, Vec2};
 
 /// A collection of text locked into place.
 #[derive(Clone, Debug, Default)]
@@ -551,7 +551,7 @@ fn test_text_layout() {
         }
     }
 
-    use crate::paint::*;
+    use crate::*;
 
     let pixels_per_point = 1.0;
     let fonts = text::Fonts::from_definitions(pixels_per_point, text::FontDefinitions::default());

epaint/src/triangles.rs

@@ -1,5 +1,5 @@
-use super::*;
 use crate::*;
+use emath::*;
 
 /// The vertex type.
 ///