Correção bug ao salvar imagem png com fundo transparente

Author: FernandoZueet

src/ImageGd/ImageGd.php

@@ -130,19 +130,25 @@ public function imageCreateFrom(string $mimeType, string $filename)
      * Image adjustments
      *
      * @param resource $image
+     * @param string $mimeType
      * @return boolean
      */
-    public function imageAdjustments($image = null) : bool
+    public function imageAdjustments($image = null, string $mimeType = '') : bool
     {
         if ($image == null) {
             $image = $this->imageResource;
         }
+
+        $blendmode = true;
+        if($mimeType == 'image/png') {
+            $blendmode = false;
+        }
 
         if(!imagepalettetotruecolor($image)) {
             return false;
         };
 
-        if(!imagealphablending($image, true)) {
+        if(!imagealphablending($image, $blendmode)) {
             return false;
         }
 

src/ImageGd/ResizeImage.php

@@ -137,7 +137,7 @@ public function execute() : bool
         $imageDst = imagecreatetruecolor($width, $height);
 
         //image adjustments
-        if (!$this->getImageGd()->imageAdjustments($imageDst)) {
+        if (!$this->getImageGd()->imageAdjustments($imageDst, $this->getFile()['mimeType'])) {
             return false;
         }
 

src/ImageGd/WatermarksImage.php

@@ -141,7 +141,7 @@ public function execute() : bool
         }
 
         //image adjustments
-        if (!$this->getImageGd()->imageAdjustments($image)) {
+        if (!$this->getImageGd()->imageAdjustments($image, $this->getFile()['mimeType'])) {
             return false;
         }