Style primitives

lib/ui/src/scene.rs

@@ -8,7 +8,7 @@ use tracing::debug;
 use crate::ImageResource;
 use crate::text::TextSelectionStyle;
 use crate::trace_targets;
-use crate::tree::ElementId;
+use crate::tree::{BoxShadowKind, ElementId};
 
 pub type SceneVersion = u64;
 
@@ -100,6 +100,32 @@ impl Quad {
     }
 }
 
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct RoundedRect {
+    pub rect: Rect,
+    pub fill: Option<Color>,
+    pub border_color: Option<Color>,
+    pub border_width: f32,
+    pub radius: f32,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct ShadowRect {
+    pub rect: Rect,
+    pub source_rect: Rect,
+    pub color: Color,
+    pub blur: f32,
+    pub radius: f32,
+    pub source_radius: f32,
+    pub kind: BoxShadowKind,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct ClipRegion {
+    pub rect: Rect,
+    pub radius: f32,
+}
+
 #[derive(Clone, Debug, PartialEq)]
 pub struct GlyphInstance {
     pub position: Point,
@@ -465,9 +491,11 @@ fn classify_word_char(ch: char) -> WordClass {
 #[derive(Clone, Debug, PartialEq)]
 pub enum DisplayItem {
     Quad(Quad),
+    RoundedRect(RoundedRect),
+    ShadowRect(ShadowRect),
     Image(PreparedImage),
     Text(PreparedText),
-    PushClip(Rect),
+    PushClip(ClipRegion),
     PopClip,
     PushTransform(Translation),
     PopTransform,
@@ -512,6 +540,14 @@ impl SceneSnapshot {
         self.push_item(DisplayItem::Quad(Quad::new(rect, color)))
     }
 
+    pub fn push_rounded_rect(&mut self, rounded_rect: RoundedRect) -> &mut Self {
+        self.push_item(DisplayItem::RoundedRect(rounded_rect))
+    }
+
+    pub fn push_shadow_rect(&mut self, shadow_rect: ShadowRect) -> &mut Self {
+        self.push_item(DisplayItem::ShadowRect(shadow_rect))
+    }
+
     pub fn push_text(&mut self, text: PreparedText) -> &mut Self {
         self.push_item(DisplayItem::Text(text))
     }
@@ -520,8 +556,8 @@ impl SceneSnapshot {
         self.push_item(DisplayItem::Image(image))
     }
 
-    pub fn push_clip(&mut self, rect: Rect) -> &mut Self {
-        self.push_item(DisplayItem::PushClip(rect))
+    pub fn push_clip(&mut self, rect: Rect, radius: f32) -> &mut Self {
+        self.push_item(DisplayItem::PushClip(ClipRegion { rect, radius }))
     }
 
     pub fn pop_clip(&mut self) -> &mut Self {