Fix transparent background images to be displayed correctly (#2638)

* fix(TemplateProcessor): Images with transparent backgrounds are now correctly displayed with transparency.

* docs: Updated changelog

* docs: Name

Author: ElwynVdb

docs/changes/2.x/2.0.0.md

@@ -26,6 +26,7 @@
 - HTML Reader : Read width & height attributes in points fixing [#2589](https://github.com/PHPOffice/PHPWord/issues/2589) by [@Progi1984](https://github.com/Progi1984) in [#2654](https://github.com/PHPOffice/PHPWord/pull/2654)
 - Template Processor : Fixed bad naming of variables fixing [#2586](https://github.com/PHPOffice/PHPWord/issues/2586) by [@Progi1984](https://github.com/Progi1984) in [#2655](https://github.com/PHPOffice/PHPWord/pull/2655)
 - Word2007 Writer : Fix first footnote appearing as separator [#2634](https://github.com/PHPOffice/PHPWord/issues/2634) by [@jacksleight](https://github.com/jacksleight) in [#2635](https://github.com/PHPOffice/PHPWord/pull/2635)
+- Template Processor : Fixed images with transparent backgrounds displaying a white background by [@ElwynVdb](https://github.com/ElwynVdb) in [#2638](https://github.com/PHPOffice/PHPWord/pull/2638)
 
 ### Miscellaneous
 

src/PhpWord/TemplateProcessor.php

@@ -668,7 +668,7 @@ public function setImageValue($search, $replace, $limit = self::MAXIMUM_REPLACEM
 
         // define templates
         // result can be verified via "Open XML SDK 2.5 Productivity Tool" (http://www.microsoft.com/en-us/download/details.aspx?id=30425)
-        $imgTpl = '<w:pict><v:shape type="#_x0000_t75" style="width:{WIDTH};height:{HEIGHT}" stroked="f"><v:imagedata r:id="{RID}" o:title=""/></v:shape></w:pict>';
+        $imgTpl = '<w:pict><v:shape type="#_x0000_t75" style="width:{WIDTH};height:{HEIGHT}" stroked="f" filled="f"><v:imagedata r:id="{RID}" o:title=""/></v:shape></w:pict>';
 
         $i = 0;
         foreach ($searchParts as $partFileName => &$partContent) {