show some love to hyper

Assets/Audio/ThemeShaderBinder.cs

@@ -11,6 +11,7 @@ public class ThemeShaderBinder : MonoBehaviour
     private Texture2D _texture;
     private Color[] _colorCache;
     private int textureSize = 128;
+    private Gradient _theme;
 
     private void Start() {
         if (preferences == null) {
@@ -24,20 +25,38 @@ public class ThemeShaderBinder : MonoBehaviour
         UpdateBinding();
     }
 
-    private void InitialiseTexture() {
-        Debug.Log("Reinitialising spectrum texture...");
-        _texture = new Texture2D(textureSize, 1);
-        _colorCache = new Color[textureSize];
-        _texture.name = $"ThemeTexture{textureSize}";
+    public Color DecomposeHdrColor(Color linearColorHdr) {
+        var maxColorComponent = linearColorHdr.maxColorComponent;
+        float scaleFactor = 191f / maxColorComponent;
+        float exposure = Mathf.Log(255f / scaleFactor) / Mathf.Log(2f);
+        float factor = 1f / exposure;
+
+        if (exposure <= 1f) {
+            return linearColorHdr;
+        }
+
+        float r = linearColorHdr.r * factor;
+        float g = linearColorHdr.g * factor;
+        float b = linearColorHdr.b * factor;
+
+        return new Color(r, g, b, linearColorHdr.a);
     }
 
     private void UpdateTexture() {
-        // init
-        if (_texture == null) InitialiseTexture();
+        if (_theme == preferences.Theme()) return;
+
+        Debug.Log("Reinitialising Theme texture...");
+        _texture = new Texture2D(textureSize, 1);
+        _theme = preferences.Theme();
+        _colorCache = new Color[textureSize];
+        _texture.name = $"ThemeTexture{textureSize}";
+        _texture.wrapMode = TextureWrapMode.Clamp;
 
-        Gradient theme = preferences.Theme();
         for (int i = 0; i < textureSize; i++) {
-            _colorCache[i] = theme.Evaluate((float)i / (float)textureSize);
+            // Color decomposed = DecomposeHdrColor(_theme.Evaluate((float)i / (float)textureSize));
+            if (_theme == null) return;
+            Color color = _theme.Evaluate((float)i / (float)textureSize);
+            _colorCache[i] = color;
         }
 
         _texture.SetPixels(_colorCache);