initial

1 files changed, 101 insertions, 0 deletions

diff --git a/src/color.rs b/src/color.rs
new file mode 100644
index 0000000..6ade373
--- /dev/null
+++ b/src/color.rs
@@ -0,0 +1,101 @@
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct Color {
+    pub r: f64,
+    pub g: f64,
+    pub b: f64,
+}
+
+impl Color {
+    pub fn rgb(r: f64, g: f64, b: f64) -> Self {
+        Self { r, g, b }
+    }
+
+    pub fn parse(c: &str) -> Option<Self> {
+        match c {
+            "red" => Some(Color::RED),
+            "green" => Some(Color::GREEN),
+            "blue" => Some(Color::BLUE),
+            "yellow" => Some(Color::YELLOW),
+            "cyan" => Some(Color::CYAN),
+            "magenta" => Some(Color::MAGENTA),
+            "black" => Some(Color::BLACK),
+            "white" => Some(Color::WHITE),
+            _ => {
+                if c.len() == 6 {
+                    Some(Self::from_rgb888(
+                        u8::from_str_radix(&c[0..2], 16).ok()?,
+                        u8::from_str_radix(&c[2..4], 16).ok()?,
+                        u8::from_str_radix(&c[4..6], 16).ok()?,
+                    ))
+                } else {
+                    None
+                }
+            }
+        }
+    }
+
+    pub fn as_rgb888(&self) -> (u8, u8, u8) {
+        (
+            (self.r * 255.0) as u8,
+            (self.g * 255.0) as u8,
+            (self.b * 255.0) as u8,
+        )
+    }
+    pub fn from_rgb888(r: u8, g: u8, b: u8) -> Self {
+        Color {
+            r: r as f64 / 255.0,
+            g: g as f64 / 255.0,
+            b: b as f64 / 255.0,
+        }
+    }
+    pub const RED: Color = Color {
+        r: 1.0,
+        g: 0.0,
+        b: 0.0,
+    };
+    pub const GREEN: Color = Color {
+        r: 0.0,
+        g: 1.0,
+        b: 0.0,
+    };
+    pub const BLUE: Color = Color {
+        r: 0.0,
+        g: 0.0,
+        b: 1.0,
+    };
+    pub const YELLOW: Color = Color {
+        r: 1.0,
+        g: 1.0,
+        b: 0.0,
+    };
+    pub const CYAN: Color = Color {
+        r: 0.0,
+        g: 1.0,
+        b: 1.0,
+    };
+    pub const MAGENTA: Color = Color {
+        r: 1.0,
+        g: 0.0,
+        b: 1.0,
+    };
+
+    pub const BLACK: Color = Color {
+        r: 0.0,
+        g: 0.0,
+        b: 0.0,
+    };
+    pub const WHITE: Color = Color {
+        r: 1.0,
+        g: 1.0,
+        b: 1.0,
+    };
+
+    pub fn mix(a: Color, b: Color, x: f64) -> Color {
+        let y = 1.0 - x;
+        Color {
+            r: a.r * y + b.r * x,
+            g: a.g * y + b.g * x,
+            b: a.b * y + b.b * x,
+        }
+    }
+}