Upload spectral-core/src/color.rs

spectral-core/src/color.rs

@@ -0,0 +1,29 @@
+/// Packed RGBA8 color.
+pub type Rgb8 = u32;
+
+/// Named ANSI colors.
+pub const ANSI_COLORS: [Rgb8; 16] = [
+    0xFF_000000, 0xFF_CD3131, 0xFF_0DBC79, 0xFF_E5E510,
+    0xFF_2472C8, 0xFF_BC3FBC, 0xFF_11A8CD, 0xFF_E5E5E5,
+    0xFF_666666, 0xFF_F14C4C, 0xFF_23D18B, 0xFF_F5F543,
+    0xFF_3B8EEA, 0xFF_D670D6, 0xFF_29B8DB, 0xFF_E5E5E5,
+];
+
+/// Convert HSL to RGB8.
+pub fn hsl(h: f32, s: f32, l: f32) -> Rgb8 {
+    let c = (1.0 - (2.0 * l - 1.0).abs()) * s;
+    let x = c * (1.0 - ((h / 60.0) % 2.0 - 1.0).abs());
+    let m = l - c / 2.0;
+    let (r1, g1, b1) = match h as i32 / 60 {
+        0 => (c, x, 0.0),
+        1 => (x, c, 0.0),
+        2 => (0.0, c, x),
+        3 => (0.0, x, c),
+        4 => (x, 0.0, c),
+        _ => (c, 0.0, x),
+    };
+    let r = ((r1 + m) * 255.0).clamp(0.0, 255.0) as u32;
+    let g = ((g1 + m) * 255.0).clamp(0.0, 255.0) as u32;
+    let b = ((b1 + m) * 255.0).clamp(0.0, 255.0) as u32;
+    0xFF_000000 | (r << 16) | (g << 8) | b
+}