1 files changed, 93 insertions, 0 deletions
diff --git a/src/main/java/com/thatgravyboat/skyblockhud/utils/SpecialColour.java b/src/main/java/com/thatgravyboat/skyblockhud/utils/SpecialColour.java
new file mode 100644
index 0000000..9c1b723
--- /dev/null
+++ b/src/main/java/com/thatgravyboat/skyblockhud/utils/SpecialColour.java
@@ -0,0 +1,93 @@
+package com.thatgravyboat.skyblockhud.utils;
+
+import java.awt.*;
+
+public class SpecialColour {
+
+    public static String special(int chromaSpeed, int alpha, int rgb) {
+        return special(chromaSpeed, alpha, (rgb & 0xFF0000) >> 16, (rgb & 0x00FF00) >> 8, (rgb & 0x0000FF));
+    }
+
+    private static final int RADIX = 10;
+
+    public static String special(int chromaSpeed, int alpha, int r, int g, int b) {
+        StringBuilder sb = new StringBuilder();
+        sb.append(Integer.toString(chromaSpeed, RADIX)).append(":");
+        sb.append(Integer.toString(alpha, RADIX)).append(":");
+        sb.append(Integer.toString(r, RADIX)).append(":");
+        sb.append(Integer.toString(g, RADIX)).append(":");
+        sb.append(Integer.toString(b, RADIX));
+        return sb.toString();
+    }
+
+    private static int[] decompose(String csv) {
+        String[] split = csv.split(":");
+
+        int[] arr = new int[split.length];
+
+        for (int i = 0; i < split.length; i++) {
+            arr[i] = Integer.parseInt(split[split.length - 1 - i], RADIX);
+        }
+        return arr;
+    }
+
+    public static int specialToSimpleRGB(String special) {
+        int[] d = decompose(special);
+        int r = d[2];
+        int g = d[1];
+        int b = d[0];
+        int a = d[3];
+        int chr = d[4];
+
+        return ((a & 0xFF) << 24 | (r & 0xFF) << 16 | (g & 0xFF) << 8 | (b & 0xFF));
+    }
+
+    public static int getSpeed(String special) {
+        return decompose(special)[4];
+    }
+
+    public static float getSecondsForSpeed(int speed) {
+        return ((255 - speed) / 254f * (MAX_CHROMA_SECS - MIN_CHROMA_SECS) + MIN_CHROMA_SECS);
+    }
+
+    private static final int MIN_CHROMA_SECS = 1;
+    private static final int MAX_CHROMA_SECS = 60;
+
+    public static long startTime = -1;
+
+    public static int specialToChromaRGB(String special) {
+        if (startTime < 0) startTime = System.currentTimeMillis();
+
+        int[] d = decompose(special);
+        int chr = d[4];
+        int a = d[3];
+        int r = d[2];
+        int g = d[1];
+        int b = d[0];
+
+        float[] hsv = Color.RGBtoHSB(r, g, b, null);
+
+        if (chr > 0) {
+            float seconds = getSecondsForSpeed(chr);
+            hsv[0] += (System.currentTimeMillis() - startTime) / 1000f / seconds;
+            hsv[0] %= 1;
+            if (hsv[0] < 0) hsv[0] += 1;
+        }
+
+        return ((a & 0xFF) << 24 | (Color.HSBtoRGB(hsv[0], hsv[1], hsv[2]) & 0x00FFFFFF));
+    }
+
+    public static int rotateHue(int argb, int degrees) {
+        int a = (argb >> 24) & 0xFF;
+        int r = (argb >> 16) & 0xFF;
+        int g = (argb >> 8) & 0xFF;
+        int b = (argb) & 0xFF;
+
+        float[] hsv = Color.RGBtoHSB(r, g, b, null);
+
+        hsv[0] += degrees / 360f;
+        hsv[0] %= 1;
+
+        return ((a & 0xFF) << 24 | (Color.HSBtoRGB(hsv[0], hsv[1], hsv[2]) & 0x00FFFFFF));
+    }
+}