Merge branch 'rust'

1 files changed, 41 insertions, 0 deletions

diff --git a/src/renderer.rs b/src/renderer.rs
new file mode 100644
index 0000000..b0e702d
--- /dev/null
+++ b/src/renderer.rs
@@ -0,0 +1,41 @@
+use rand::{Rng, rng};
+
+#[derive(Clone)]
+pub enum Renderer {
+    Ansi,
+    Color256,
+    TrueColor,
+    FakeColor,
+}
+
+impl Renderer {
+    pub fn random() -> Self {
+        let mut rng = rng();
+        let renderers = [Self::Ansi, Self::Color256, Self::TrueColor, Self::FakeColor];
+        let index = rng.random_range(0..renderers.len());
+        renderers.get(index).unwrap_or(&Self::Ansi).clone()
+    }
+    pub fn render(&self, red: u8, green: u8, blue: u8) -> String {
+        match self {
+            Renderer::Ansi => {
+                let color_offset =
+                    ((u16::from(red) + u16::from(green) + u16::from(blue)) * 7) / (255 * 3);
+                let color_number = 40 + color_offset;
+                format!("\x1B[{color_number}m")
+            }
+            Renderer::Color256 => {
+                let red_value = (u16::from(red) * 5) / 255;
+                let green_value = (u16::from(green) * 5) / 255;
+                let blue_value = (u16::from(blue) * 5) / 255;
+                let color_number = 16 + 36 * red_value + 6 * green_value + blue_value;
+                format!("\x1B[48;5;{color_number}m")
+            }
+            Renderer::TrueColor => {
+                format!("\x1B[48;2;{red};{green};{blue}m")
+            }
+            Renderer::FakeColor => {
+                format!("\x1B[28;2;{red};{green};{blue}m")
+            }
+        }
+    }
+}