Initial implementation

1 files changed, 95 insertions, 0 deletions

diff --git a/src/shapes.rs b/src/shapes.rs
new file mode 100644
index 0000000..2b8db2c
--- /dev/null
+++ b/src/shapes.rs
@@ -0,0 +1,95 @@
+use wmap_parser::Shape;
+
+/// Draws a vertex shape at the given position
+pub fn draw_vertex(
+    ctx: &cairo::Context,
+    shape: &Shape,
+    x: f64,
+    y: f64,
+    width: f64,
+    height: f64,
+) -> Result<(), cairo::Error> {
+    match shape {
+        Shape::Circle => draw_circle(ctx, x, y, width, height),
+        Shape::Square => draw_square(ctx, x, y, width, height),
+        Shape::Triangle => draw_triangle(ctx, x, y, width, height),
+        Shape::X => draw_x(ctx, x, y, width, height),
+    }
+}
+
+fn draw_circle(
+    ctx: &cairo::Context,
+    x: f64,
+    y: f64,
+    width: f64,
+    height: f64,
+) -> Result<(), cairo::Error> {
+    ctx.save()?;
+    ctx.translate(x + width / 2.0, y + height / 2.0);
+    ctx.scale(width / 2.0, height / 2.0);
+    ctx.arc(0.0, 0.0, 1.0, 0.0, 2.0 * std::f64::consts::PI);
+    ctx.restore()?;
+    ctx.fill()?;
+    Ok(())
+}
+
+fn draw_square(
+    ctx: &cairo::Context,
+    x: f64,
+    y: f64,
+    width: f64,
+    height: f64,
+) -> Result<(), cairo::Error> {
+    ctx.rectangle(x, y, width, height);
+    ctx.fill()?;
+    Ok(())
+}
+
+fn draw_triangle(
+    ctx: &cairo::Context,
+    x: f64,
+    y: f64,
+    width: f64,
+    height: f64,
+) -> Result<(), cairo::Error> {
+    ctx.move_to(x + width / 2.0, y);
+    ctx.line_to(x + width, y + height);
+    ctx.line_to(x, y + height);
+    ctx.close_path();
+    ctx.fill()?;
+    Ok(())
+}
+
+fn draw_x(
+    ctx: &cairo::Context,
+    x: f64,
+    y: f64,
+    width: f64,
+    height: f64,
+) -> Result<(), cairo::Error> {
+    let line_width = 2.0;
+    ctx.set_line_width(line_width);
+    ctx.move_to(x, y);
+    ctx.line_to(x + width, y + height);
+    ctx.move_to(x + width, y);
+    ctx.line_to(x, y + height);
+    ctx.stroke()?;
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_draw_shapes() {
+        // Just verify the functions don't panic
+        let surface = cairo::ImageSurface::create(cairo::Format::Rgb24, 100, 100).unwrap();
+        let ctx = cairo::Context::new(&surface).unwrap();
+
+        assert!(draw_vertex(&ctx, &Shape::Circle, 0.0, 0.0, 25.0, 25.0).is_ok());
+        assert!(draw_vertex(&ctx, &Shape::Square, 0.0, 0.0, 25.0, 25.0).is_ok());
+        assert!(draw_vertex(&ctx, &Shape::Triangle, 0.0, 0.0, 25.0, 25.0).is_ok());
+        assert!(draw_vertex(&ctx, &Shape::X, 0.0, 0.0, 25.0, 25.0).is_ok());
+    }
+}