From: Andrey Kutejko <andy128k@gmail.com>
Date: Sat, 14 Sep 2013 09:45:54 +0000 (+0300)
Subject: make replaceColor alpha aware
X-Git-Tag: 0.5~41
X-Git-Url: https://git.andy128k.dev/?a=commitdiff_plain;h=06c14c0c701780ea4087f56a6e77a18aef805715;p=ipf.git

make replaceColor alpha aware
---

diff --git a/ipf/image.php b/ipf/image.php
index 3c7164e..56f9b1e 100644
--- a/ipf/image.php
+++ b/ipf/image.php
@@ -234,15 +234,24 @@ class IPF_Image
         return $result;
     }
 
-    public function replaceColor($from, $to)
+    public function replaceColor($from, $to, $colorOnly=true)
     {
 	      $from = $this->color($from);
 	      $to = $this->color($to);
+        if ($colorOnly) {
+            $from = $from & 0xFFFFFF;
+            $to = $to & 0xFFFFFF;
+	      }
 	      for ($y = 0; $y < $this->height; ++$y) {
 		        for ($x = 0; $x < $this->width; ++$x) {
 			          $at = imagecolorat($this->image, $x, $y);
-			          if ($at == $from)
-  				          imagesetpixel($this->image, $x, $y, $to);
+                if ($colorOnly) {
+			              if (($at & 0xFFFFFF) === $from)
+      				          imagesetpixel($this->image, $x, $y, $to | ($at & 0x7F000000));
+			          } else {
+			              if ($at === $from)
+      				          imagesetpixel($this->image, $x, $y, $to);
+			          }
 		        }
 	      }
     }