1 files changed, 82 insertions, 0 deletions
diff --git a/src/layout/frame.rs b/src/layout/frame.rs
new file mode 100644
index 00000000..c85d7539
--- /dev/null
+++ b/src/layout/frame.rs
@@ -0,0 +1,82 @@
+use super::Shaped;
+use crate::color::Color;
+use crate::env::ResourceId;
+use crate::geom::{Point, Size};
+
+/// A finished layout with elements at fixed positions.
+#[derive(Debug, Clone, PartialEq)]
+pub struct Frame {
+    /// The size of the frame.
+    pub size: Size,
+    /// The elements composing this layout.
+    pub elements: Vec<(Point, Element)>,
+}
+
+impl Frame {
+    /// Create a new, empty frame.
+    pub fn new(size: Size) -> Self {
+        Self { size, elements: vec![] }
+    }
+
+    /// Add an element at a position.
+    pub fn push(&mut self, pos: Point, element: Element) {
+        self.elements.push((pos, element));
+    }
+
+    /// Add all elements of another frame, placing them relative to the given
+    /// position.
+    pub fn push_frame(&mut self, pos: Point, subframe: Self) {
+        for (subpos, element) in subframe.elements {
+            self.push(pos + subpos, element);
+        }
+    }
+}
+
+/// The building block frames are composed of.
+#[derive(Debug, Clone, PartialEq)]
+pub enum Element {
+    /// Shaped text.
+    Text(Shaped),
+    /// A geometric shape.
+    Geometry(Geometry),
+    /// A raster image.
+    Image(Image),
+}
+
+/// A shape with some kind of fill.
+#[derive(Debug, Clone, PartialEq)]
+pub struct Geometry {
+    /// The shape to draw.
+    pub shape: Shape,
+    /// How the shape looks on the inside.
+    //
+    // TODO: This could be made into a Vec<Fill> or something such that
+    //       the user can compose multiple fills with alpha values less
+    //       than one to achieve cool effects.
+    pub fill: Fill,
+}
+
+/// Some shape.
+#[derive(Debug, Clone, PartialEq)]
+pub enum Shape {
+    /// A rectangle.
+    Rect(Size),
+}
+
+/// The kind of graphic fill to be applied to a [`Shape`].
+#[derive(Debug, Copy, Clone, PartialEq)]
+pub enum Fill {
+    /// The fill is a color.
+    Color(Color),
+    /// The fill is an image.
+    Image(Image),
+}
+
+/// An image element.
+#[derive(Debug, Copy, Clone, PartialEq)]
+pub struct Image {
+    /// The image resource.
+    pub res: ResourceId,
+    /// The size of the image in the document.
+    pub size: Size,
+}