initial commit

src/render/primitive/format.rs

@@ -0,0 +1,97 @@
+use crate::primitive::{point::point, Point};
+
+#[repr(C)]
+#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable, Default)]
+pub struct UIPos {
+    pub anchor: Point,
+    pub offset: Point,
+}
+
+impl UIPos {
+    pub const fn anchor_offset(anchor_x: f32, anchor_y: f32, offset_x: f32, offset_y: f32) -> Self {
+        Self {
+            anchor: point(anchor_x, anchor_y),
+            offset: point(offset_x, offset_y),
+        }
+    }
+
+    pub const fn top_left() -> Self {
+        Self::anchor_offset(0.0, 0.0, 0.0, 0.0)
+    }
+
+    pub const fn bottom_right() -> Self {
+        Self::anchor_offset(1.0, 1.0, 0.0, 0.0)
+    }
+
+    pub const fn within(&self, region: &UIRegion) -> UIPos {
+        let range = region.bot_right.anchor - region.top_left.anchor;
+        let region_offset = region
+            .top_left
+            .offset
+            .lerp(region.bot_right.offset, self.anchor);
+        UIPos {
+            anchor: region.top_left.anchor + self.anchor * range,
+            offset: self.offset + region_offset,
+        }
+    }
+
+    pub fn axis_mut(&mut self, axis: Axis) -> UIPosAxisView<'_> {
+        match axis {
+            Axis::X => UIPosAxisView {
+                anchor: &mut self.anchor.x,
+                offset: &mut self.offset.x,
+            },
+            Axis::Y => UIPosAxisView {
+                anchor: &mut self.anchor.y,
+                offset: &mut self.offset.y,
+            },
+        }
+    }
+}
+
+pub struct UIPosAxisView<'a> {
+    pub anchor: &'a mut f32,
+    pub offset: &'a mut f32,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
+pub struct UIRegion {
+    pub top_left: UIPos,
+    pub bot_right: UIPos,
+}
+
+impl UIRegion {
+    pub const fn full() -> Self {
+        Self {
+            top_left: UIPos::top_left(),
+            bot_right: UIPos::bottom_right(),
+        }
+    }
+    pub fn within(&self, parent: &Self) -> Self {
+        Self {
+            top_left: self.top_left.within(parent),
+            bot_right: self.bot_right.within(parent),
+        }
+    }
+    pub fn select(&mut self, inner: &Self) {
+        *self = inner.within(self);
+    }
+    pub fn axis_mut(&mut self, axis: Axis) -> UIRegionAxisView<'_> {
+        UIRegionAxisView {
+            top_left: self.top_left.axis_mut(axis),
+            bot_right: self.bot_right.axis_mut(axis),
+        }
+    }
+}
+
+pub struct UIRegionAxisView<'a> {
+    pub top_left: UIPosAxisView<'a>,
+    pub bot_right: UIPosAxisView<'a>,
+}
+
+#[derive(Copy, Clone)]
+pub enum Axis {
+    X,
+    Y,
+}