From 1dcb9c785c44960890970d26e25c437a2a252bbf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fatih=20K=C4=B1zmaz?= <barka_21@hotmail.com>
Date: Mon, 4 Mar 2024 18:41:11 +0300
Subject: [PATCH] Support hex colors with alpha channel: RGBA and RRGGBBAA
 (#337)

* Support hex colors with alpha channel: RGBA and RRGGBBAA

Added support for 4 and 8 digit hex colors with alpha channel. Eg: #00ff0080

* Fix max val.
---
 src/claviska/SimpleImage.php | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/claviska/SimpleImage.php b/src/claviska/SimpleImage.php
index 703c599..75a1826 100644
--- a/src/claviska/SimpleImage.php
+++ b/src/claviska/SimpleImage.php
@@ -2337,18 +2337,24 @@ public static function normalizeColor(string|array $color): array
             $hex = strval(preg_replace('/^#/', '', $color));
 
             // Support short and standard hex codes
-            if (strlen($hex) === 3) {
+            if (strlen($hex) === 3 || strlen($hex) === 4) {
                 [$red, $green, $blue] = [
                     $hex[0].$hex[0],
                     $hex[1].$hex[1],
                     $hex[2].$hex[2],
                 ];
-            } elseif (strlen($hex) === 6) {
+                if (strlen($hex) === 4) {
+                    $alpha = hexdec($hex[3]) / 255;
+                }
+            } elseif (strlen($hex) === 6 || strlen($hex) === 8) {
                 [$red, $green, $blue] = [
                     $hex[0].$hex[1],
                     $hex[2].$hex[3],
                     $hex[4].$hex[5],
                 ];
+                if (strlen($hex) === 8) {
+                    $alpha = hexdec($hex[6].$hex[7]) / 255;
+                }
             } else {
                 throw new Exception("Invalid color value: $color", self::ERR_INVALID_COLOR);
             }