From c7f0c2e46ea07d9e8ca2e9ee71065b9171d9bf8e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Filipe?= <andre.r.flip@gmail.com>
Date: Thu, 28 Jul 2016 16:21:08 +0100
Subject: [PATCH] Default background color in case of png is transparent

---
 README.md       | 1 +
 demo/index.html | 3 +--
 src/Capture.php | 6 +++++-
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 90a8a075..3e79cf16 100755
--- a/README.md
+++ b/README.md
@@ -65,6 +65,7 @@ And the resulted image format
 // allowed formats are 'jpg' and 'png', default is 'jpg'.
 $screenCapture->setFormat('png');
 ```
+* If the format is ```jpg``` and the background color is not set, the default value will be ```#FFFFFF```, if ```png``` the default background color will be transparent.
 
 And most importantly, save the result
 ``` php
diff --git a/demo/index.html b/demo/index.html
index b39ab709..306e8ca4 100644
--- a/demo/index.html
+++ b/demo/index.html
@@ -97,7 +97,6 @@ <h2>Give it a test drive...</h2>
         <input type="number" class="form-control" name="h" placeholder="768">
       </div>
 
-
       <div class="form-group col-md-6">
         <label for="user-agent">User Agent String</label>
         <input type="text" class="form-control" name="user-agent"
@@ -115,7 +114,7 @@ <h2>Give it a test drive...</h2>
       <div class="col-md-6"></div>
       <div class="form-group col-md-3">
         <label for="bg-color">Background color</label>
-        <input type="text" name="bg-color" value="#ffffff" class="form-control color-picker" data-format="hex"/>
+        <input type="text" name="bg-color" value="" class="form-control color-picker" data-format="hex"/>
       </div>
 
       <div class="form-group col-md-3">
diff --git a/src/Capture.php b/src/Capture.php
index 8f1fe757..e75b2ca1 100644
--- a/src/Capture.php
+++ b/src/Capture.php
@@ -54,7 +54,7 @@ class Capture
      *
      * @var string
      */
-    protected $backgroundColor = '#FFFFFF';
+    protected $backgroundColor = '';
 
     /**
      * Image format
@@ -135,6 +135,10 @@ public function save($imageLocation, $deleteFileIfExists = true)
 
         if ($this->backgroundColor) {
             $data['backgroundColor'] = $this->backgroundColor;
+        } elseif ($this->getFormat() == 'jpg') {
+            // If there is no background color set, and it's a jpeg
+            // we need to set a bg color, otherwise the background will be black
+            $data['backgroundColor'] = '#FFFFFF';
         }
 
         if ($this->userAgentString) {