Adjust brightness by re-setting colors.

Fixes #2 by simply just resetting things instead of trying to clone the OG code and being fancy-schmancy.

build.gradle.kts

@@ -28,7 +28,7 @@ dependencies {
     api("com.diozero:diozero-core:$DIOZERO_VER")
 
     // for adhoc testing
-    testImplementation("com.diozero:diozero-provider-remote:$DIOZERO_VER")
+    implementation("com.diozero:diozero-provider-remote:$DIOZERO_VER")
     testImplementation("com.diozero:diozero-provider-mock:$DIOZERO_VER")
 
     testImplementation("io.kotest:kotest-runner-junit5:5.5.5")

src/main/kotlin/crackers/kobots/devices/lighting/PixelBuf.kt

@@ -69,17 +69,10 @@ abstract class PixelBuf(
         get() = _brightness
         set(b) {
             if (b < 0f || b > 1f) throw IllegalArgumentException("'brightness' is out of range (0.0-1.0)")
-            val delta = b - _brightness
-            _brightness = b
-
-            // adjust brightness of existing values
-            for (i in 0 until effectiveSize) {
-                if (dotstarMode && (i + 1) % 4 == 0) continue
-                val index = i + bufferOffset
-                val item = pixelBuffer[index].toUByte().toFloat()
-                val adjusted = (item * delta).roundToInt()
-                pixelBuffer[index] = (item + adjusted).toInt().toByte()
-            }
+            val currentAutoWrite = _autoWrite
+            _autoWrite = false
+            currentColors.clone().forEachIndexed { i, c -> set(i, PixelColor(c.color, c.white, b)) }
+            _autoWrite = currentAutoWrite
             if (_autoWrite) show()
         }