update rounded corner api

hui-examples/examples/mom_downloader.rs

@@ -6,7 +6,7 @@ use winit::{
   event_loop::{EventLoopBuilder, ControlFlow}
 };
 use hui::{
-  element::{
+  draw::CornerRadius, element::{
     container::{Alignment, Container, Sides}, progress_bar::ProgressBar, text::Text
   }, elements, UiDirection, UiInstance, UiSize
 };
@@ -52,7 +52,7 @@ fn main() {
             align: (Alignment::Begin, Alignment::Begin),
             size: (UiSize::Static(450.), UiSize::Auto),
             background: Some(vec4(0.2, 0.2, 0.5, 1.)),
-            corner_radius: Some(8.),
+            corner_radius: Some(CornerRadius::all(8.)),
             elements: elements(|el| {
               if instant.elapsed().as_secs_f32() < 5. {
                 el.add(Text {

hui-examples/examples/rounded.rs

@@ -5,11 +5,10 @@ use winit::{
   event_loop::{EventLoopBuilder, ControlFlow}
 };
 use hui::{
-  UiDirection, UiInstance, UiSize,
-  element::{
+  draw::CornerRadius, element::{
     container::{Alignment, Container, Sides},
     text::Text
-  },
+  }, UiDirection, UiInstance, UiSize
 };
 use hui_glium::GliumUiRenderer;
 
@@ -42,7 +41,12 @@ fn main() {
             align: (Alignment::Center, Alignment::Center),
             size: (UiSize::Fraction(0.5), UiSize::Fraction(0.5)),
             background: Some(vec4(1., 0., 0., 1.)),
-            corner_radius: Some(30.),
+            corner_radius: Some(CornerRadius {
+              top_left: 10.,
+              top_right: 20.,
+              bottom_left: 50.,
+              bottom_right: 80.
+            }),
             elements: vec![
               Box::new(Container {
                 padding: Sides::all(20.),
@@ -50,10 +54,10 @@ fn main() {
                 align: (Alignment::Center, Alignment::Center),
                 size: (UiSize::Auto, UiSize::Auto),
                 background: Some(vec4(0.1, 0.1, 0.1, 0.5)),
-                corner_radius: Some(30.),
+                corner_radius: Some(CornerRadius::all(8.)),
                 elements: vec![
                   Box::new(Text {
-                    text: "You tried".into(),
+                    text: "Corners".into(),
                     text_size: 50,
                     color: vec4(1., 1., 1., 1.),
                     ..Default::default()

hui/Cargo.toml

@@ -22,6 +22,7 @@ glam = "0.25"
 fontdue = "0.8"
 rect_packer = "0.2"
 log = "0.4"
+nz = "0.3"
 
 [features]
 default = ["builtin_elements", "builtin_font"]

hui/src/draw.rs

@@ -1,5 +1,8 @@
 use crate::{IfModified, text::{TextRenderer, FontHandle}};
 
+mod corner_radius;
+
+pub use corner_radius::{CornerRadius, RoundedCorners};
 use std::borrow::Cow;
 use fontdue::layout::{Layout, CoordinateSystem, TextStyle};
 use glam::{Vec2, Vec4, vec2};
@@ -14,9 +17,8 @@ pub enum UiDrawCommand {
     size: Vec2,
     ///Color (RGBA)
     color: Vec4,
-    //TODO: rounded corners per side
     ///Rounded corners
-    corner_radius: Option<f32>,
+    rounded_corners: Option<RoundedCorners>,
   },
   Text {
     ///Position in pixels
@@ -132,10 +134,9 @@ impl UiDrawPlan {
       }
 
       match command {
-        UiDrawCommand::Rectangle { position, size, color, corner_radius } => {
-          let corner_radius = corner_radius.unwrap_or(0.0);
+        UiDrawCommand::Rectangle { position, size, color, rounded_corners } => {
           let vidx = swapper.current().vertices.len() as u32;
-          if corner_radius > 0.0 {
+          if let Some(corner) = rounded_corners.filter(|x| x.radius.max() > 0.0) {
             //this code is stupid as fuck
 
             //Random vert in the center for no reason
@@ -146,9 +147,8 @@ impl UiDrawPlan {
               uv: vec2(0., 0.),
             });
 
-            //TODO: make this configurable or compute dynamically
             //TODO: fix some corners tris being invisible (close enough lol)
-            let rounded_corner_verts = 8;
+            let rounded_corner_verts = corner.point_count.get() as u32;
             for i in 0..rounded_corner_verts {
               let cratio = i as f32 / rounded_corner_verts as f32;
               let angle = cratio * std::f32::consts::PI * 0.5;
@@ -156,25 +156,25 @@ impl UiDrawPlan {
               let y = angle.cos();
               //Top-right corner
               swapper.current_mut().vertices.push(UiVertex {
-                position: *position + vec2(x, 1. - y) * corner_radius + vec2(size.x - corner_radius, 0.),
+                position: *position + vec2(x, 1. - y) * corner.radius.top_right + vec2(size.x - corner.radius.top_right, 0.),
                 color: *color,
                 uv: vec2(0.0, 0.0),
               });
               //Bottom-right corner
               swapper.current_mut().vertices.push(UiVertex {
-                position: *position + vec2(x - 1., y) * corner_radius + vec2(size.x, size.y - corner_radius),
+                position: *position + vec2(x - 1., y) * corner.radius.bottom_right + vec2(size.x, size.y - corner.radius.bottom_right),
                 color: *color,
                 uv: vec2(0.0, 0.0),
               });
               //Bottom-left corner
               swapper.current_mut().vertices.push(UiVertex {
-                position: *position + vec2(1. - x, y) * corner_radius + vec2(0., size.y - corner_radius),
+                position: *position + vec2(1. - x, y) * corner.radius.bottom_left + vec2(0., size.y - corner.radius.bottom_left),
                 color: *color,
                 uv: vec2(0.0, 0.0),
               });
               //Top-left corner
               swapper.current_mut().vertices.push(UiVertex {
-                position: *position + vec2(1. - x, 1. - y) * corner_radius,
+                position: *position + vec2(1. - x, 1. - y) * corner.radius.top_left,
                 color: *color,
                 uv: vec2(0.0, 0.0),
               });

hui/src/draw/corner_radius.rs

@@ -0,0 +1,99 @@
+use std::num::NonZeroU16;
+
+#[derive(Clone, Copy, Debug, PartialEq, Default)]
+pub struct CornerRadius {
+  pub top_left: f32,
+  pub top_right: f32,
+  pub bottom_left: f32,
+  pub bottom_right: f32,
+}
+
+impl CornerRadius {
+  pub const fn all(radius: f32) -> Self {
+    Self {
+      top_left: radius,
+      top_right: radius,
+      bottom_left: radius,
+      bottom_right: radius,
+    }
+  }
+
+  pub const fn none() -> Self {
+    Self::all(0.0)
+  }
+
+  pub const fn top_bottom(top: f32, bottom: f32) -> Self {
+    Self {
+      top_left: top,
+      top_right: top,
+      bottom_left: bottom,
+      bottom_right: bottom,
+    }
+  }
+
+  pub const fn left_right(left: f32, right: f32) -> Self {
+    Self {
+      top_left: left,
+      top_right: right,
+      bottom_left: left,
+      bottom_right: right,
+    }
+  }
+
+  //XXX: should these be public? (don't see any reason to NOT expose them)
+  pub fn max(&self) -> f32 {
+    self.top_left
+      .max(self.top_right)
+      .max(self.bottom_left)
+      .max(self.bottom_right)
+  }
+
+  pub fn point_count(&self) -> NonZeroU16 {
+    //Increase for higher quality
+    const VTX_PER_CORER_RADIUS_PIXEL: f32 = 0.5;
+    NonZeroU16::new(
+      (self.max() * VTX_PER_CORER_RADIUS_PIXEL).round() as u16 + 2
+    ).unwrap()
+  }
+}
+
+impl From<f32> for CornerRadius {
+  fn from(radius: f32) -> Self {
+    Self::all(radius)
+  }
+}
+
+impl From<(f32, f32, f32, f32)> for CornerRadius {
+  fn from((top_left, top_right, bottom_left, bottom_right): (f32, f32, f32, f32)) -> Self {
+    Self {
+      top_left,
+      top_right,
+      bottom_left,
+      bottom_right,
+    }
+  }
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct RoundedCorners {
+  pub radius: CornerRadius,
+  pub point_count: NonZeroU16,
+}
+
+impl RoundedCorners {
+  pub fn from_radius(radius: CornerRadius) -> Self {
+    Self {
+      radius,
+      point_count: radius.point_count(),
+    }
+  }
+}
+
+impl Default for RoundedCorners {
+  fn default() -> Self {
+    Self {
+      radius: CornerRadius::default(),
+      point_count: NonZeroU16::new(8).unwrap(),
+    }
+  }
+}

hui/src/element/builtin/container.rs

@@ -1,6 +1,6 @@
 use glam::{Vec2, vec2, Vec4};
 use crate::{
-  draw::UiDrawCommand,
+  draw::{CornerRadius, RoundedCorners, UiDrawCommand},
   element::{MeasureContext, ProcessContext, UiElement},
   measure::{Hints, Response},
   LayoutInfo, UiDirection, UiSize
@@ -62,7 +62,7 @@ pub struct Container {
   pub borders: Sides<Option<Border>>,
   //pub clip: bool, //TODO clip children
   pub elements: Vec<Box<dyn UiElement>>,
-  pub corner_radius: Option<f32>,
+  pub corner_radius: Option<CornerRadius>,
 }
 
 impl Default for Container {
@@ -170,7 +170,7 @@ impl UiElement for Container {
         position,
         size: ctx.measure.size,
         color,
-        corner_radius: self.corner_radius,
+        rounded_corners: self.corner_radius.map(RoundedCorners::from_radius),
       });
     }
 

hui/src/element/builtin/progress_bar.rs

@@ -56,7 +56,7 @@ impl UiElement for ProgressBar {
         position: ctx.layout.position,
         size: ctx.measure.size,
         color: self.color_background,
-        corner_radius: None,
+        rounded_corners: None,
       });
     }
     if value > 0. {
@@ -64,7 +64,7 @@ impl UiElement for ProgressBar {
         position: ctx.layout.position,
         size: ctx.measure.size * vec2(value, 1.0),
         color: self.color_foreground,
-        corner_radius: None,
+        rounded_corners: None,
       });
     }
   }

hui/src/element/builtin/rect.rs

@@ -46,7 +46,7 @@ impl UiElement for Rect {
         position: ctx.layout.position,
         size: ctx.measure.size,
         color,
-        corner_radius: None,
+        rounded_corners: None,
       });
     }
   }

hui/src/input.rs

@@ -0,0 +1,3 @@
+pub(crate) struct UiInputState {
+
+}

hui/src/lib.rs

@@ -5,8 +5,11 @@
 //! Simple UI library for games and other interactive applications
 //!
 
+use std::collections::VecDeque;
+
 pub mod element;
 pub mod event;
+pub mod input;
 pub mod draw;
 pub mod measure;
 pub mod state;
@@ -14,6 +17,7 @@ pub mod text;
 pub mod interaction;
 
 use element::{MeasureContext, ProcessContext, UiElement};
+use event::UiEvent;
 use state::StateRepo;
 use draw::{UiDrawCommands, UiDrawPlan};
 use text::{TextRenderer, FontTextureInfo, FontHandle};
@@ -37,6 +41,7 @@ pub struct UiInstance {
   draw_plan: UiDrawPlan,
   draw_plan_modified: bool,
   text_renderer: TextRenderer,
+  events: VecDeque<UiEvent>,
 }
 
 impl UiInstance {
@@ -52,6 +57,7 @@ impl UiInstance {
       draw_plan_modified: false,
       // ftm: FontTextureManager::default(),
       text_renderer: TextRenderer::new(),
+      events: VecDeque::new(),
     }
   }
 
@@ -101,6 +107,10 @@ impl UiInstance {
   pub fn font_texture(&self) -> FontTextureInfo {
     self.text_renderer.font_texture()
   }
+
+  pub fn push_event(&mut self, event: UiEvent) {
+    self.events.push_back(event);
+  }
 }
 
 impl Default for UiInstance {