Normalize the values

vmcj · vmcj · commit 305abe526eeb · 2025-08-09T14:10:51.000+02:00
diff --git a/webapp/src/Utils/Utils.php b/webapp/src/Utils/Utils.php
@@ -404,7 +404,7 @@ public static function blendAlphaBackground(array $rgba, string $bg): array
 	$result = [];
         $bg = static::parseHexColor($bg);
         for ($i=0; $i<3; $i++) {
-            $result[] = $rgba[$i] * $rgba[3] + $bg[$i] * (1 - $rgba[3]);
+            $result[] = ($rgba[$i] * $rgba[3] + $bg[$i] * (255 - $rgba[3]))/255;
         }
 	return $result;
     }

Original file line number	Diff line number	Diff line change
`@@ -404,7 +404,7 @@ public static function blendAlphaBackground(array $rgba, string $bg): array`
`404`	`404`	`$result = [];`
`405`	`405`	`$bg = static::parseHexColor($bg);`
`406`	`406`	`for ($i=0; $i<3; $i++) {`
`407`		`- $result[] = $rgba[$i] * $rgba[3] + $bg[$i] * (1 - $rgba[3]);`
	`407`	`+ $result[] = ($rgba[$i] * $rgba[3] + $bg[$i] * (255 - $rgba[3]))/255;`
`408`	`408`	`}`
`409`	`409`	`return $result;`
`410`	`410`	`}`