Generate a Rust palette

slop/palette/index.mjs

@@ -149,6 +149,11 @@ function generateColors() {
     return colors;
 }
 
+function clamp(x) {
+    if (x < 0.0) { return 0.0; }
+    if (x > 255.0) { return 255.0; }
+    return Math.round(x);
+}
 
 function dump(fname, colors, width, height, scalar) {
     if (colors.length != width * height) {
@@ -156,12 +161,6 @@ function dump(fname, colors, width, height, scalar) {
     }
     let pngdata = [];
 
-    let clamp = function(x) {
-        if (x < 0.0) { return 0.0; }
-        if (x > 255.0) { return 255.0; }
-        return Math.round(x);
-    }
-
     for (var y = 0; y < height * scalar; y++) {
         for (var x = 0; x < width * scalar; x++) {
             let i = Math.floor(y / scalar) * width + Math.floor(x / scalar);
@@ -181,4 +180,21 @@ function dump(fname, colors, width, height, scalar) {
     png.pack().pipe(fs.createWriteStream(fname));
 }
 
-dump("palette.png", generateColors(), 8, 8, 64);
+function dumpRust(fname, colors) {
+    var paletteString = "";
+    paletteString += "pub const PALETTE: [[u8; 3]; " + palette.length + "] = [\n"
+    for (var i = 0; i < colors.length; i++) {
+        var c = colors[i];
+        paletteString += ("    [" +
+            clamp(255 * c.srgb.r) + ", " +
+            clamp(255 * c.srgb.g) + ", " +
+            clamp(255 * c.srgb.b) +
+        "],\n");
+    }
+    paletteString += "];\n"
+    fs.writeFileSync(fname, paletteString);
+}
+
+var palette = generateColors();
+dump("palette.png", palette, 8, 8, 64);
+dumpRust("../../src/palette.rs", palette)

src/lib.rs

@@ -1 +1,4 @@
+mod palette;
+
+pub use palette::PALETTE;
 pub type VResult<T> = Result<T, anyhow::Error>;

src/palette.rs

@@ -0,0 +1,66 @@
+pub const PALETTE: [[u8; 3]; 64] = [
+    [0, 0, 0],
+    [0, 0, 255],
+    [0, 255, 0],
+    [0, 255, 255],
+    [255, 0, 0],
+    [255, 0, 255],
+    [255, 255, 0],
+    [255, 255, 255],
+    [32, 45, 44],
+    [41, 60, 67],
+    [18, 22, 32],
+    [40, 34, 49],
+    [27, 17, 29],
+    [54, 42, 47],
+    [46, 33, 23],
+    [66, 60, 43],
+    [39, 92, 148],
+    [55, 83, 107],
+    [110, 45, 90],
+    [79, 50, 74],
+    [130, 103, 52],
+    [100, 85, 68],
+    [80, 133, 85],
+    [88, 106, 80],
+    [59, 115, 206],
+    [76, 108, 153],
+    [165, 53, 114],
+    [124, 70, 99],
+    [188, 157, 22],
+    [154, 137, 89],
+    [57, 194, 137],
+    [109, 161, 129],
+    [39, 187, 255],
+    [123, 67, 240],
+    [186, 66, 177],
+    [239, 60, 80],
+    [255, 170, 48],
+    [186, 255, 0],
+    [69, 255, 115],
+    [2, 241, 228],
+    [150, 190, 255],
+    [185, 113, 226],
+    [220, 118, 175],
+    [249, 134, 85],
+    [242, 204, 114],
+    [194, 255, 116],
+    [100, 255, 173],
+    [105, 242, 252],
+    [201, 169, 248],
+    [221, 193, 228],
+    [250, 156, 143],
+    [240, 197, 180],
+    [230, 237, 137],
+    [233, 243, 193],
+    [116, 253, 234],
+    [182, 247, 242],
+    [243, 222, 238],
+    [237, 228, 236],
+    [254, 235, 224],
+    [245, 241, 240],
+    [245, 254, 225],
+    [250, 253, 246],
+    [211, 250, 250],
+    [230, 247, 244],
+];