imagesavealpha() in Writer\AbstractWriter

2016-04-11 12:48:43 -05:00 · 2016-04-11 12:48:43 -05:00 · adfcc62e64
parent 28f801b5d0
commit adfcc62e64
1 changed files with 4 additions and 0 deletions
--- a/src/PhpWord/Writer/AbstractWriter.php
+++ b/src/PhpWord/Writer/AbstractWriter.php
@ -360,6 +360,10 @@ abstract class AbstractWriter implements WriterInterface
            // Retrive GD image content or get local media
            if (isset($element['isMemImage']) && $element['isMemImage']) {
                $image = call_user_func($element['createFunction'], $element['source']);
+                if ($element['imageType'] === 'image/png') {
+                    // PNG images need to preserve alpha channel information
+                    imagesavealpha($image, true);
+                }
                ob_start();
                call_user_func($element['imageFunction'], $image);
                $imageContents = ob_get_contents();