From d4eaea5a9e791e44d3fe27d81b7960b9ce4543fd Mon Sep 17 00:00:00 2001
From: Oliver Vogel <oliver@olivervogel.com>
Date: Sat, 30 Oct 2021 20:33:45 +0200
Subject: [PATCH] Png Encoders

---
 src/Drivers/Abstract/AbstractImage.php      |  7 ++++++
 src/Drivers/Gd/Encoders/PngEncoder.php      | 20 ++++++++++++++++
 src/Drivers/Imagick/Encoders/PngEncoder.php | 26 +++++++++++++++++++++
 3 files changed, 53 insertions(+)
 create mode 100644 src/Drivers/Gd/Encoders/PngEncoder.php
 create mode 100644 src/Drivers/Imagick/Encoders/PngEncoder.php

diff --git a/src/Drivers/Abstract/AbstractImage.php b/src/Drivers/Abstract/AbstractImage.php
index df736482..1556c451 100644
--- a/src/Drivers/Abstract/AbstractImage.php
+++ b/src/Drivers/Abstract/AbstractImage.php
@@ -94,6 +94,13 @@ abstract class AbstractImage
         );
     }
 
+    public function toPng(): EncodedImage
+    {
+        return $this->encode(
+            $this->resolveDriverClass('Encoders\PngEncoder')
+        );
+    }
+
     public function greyscale(): ImageInterface
     {
         return $this->modify(
diff --git a/src/Drivers/Gd/Encoders/PngEncoder.php b/src/Drivers/Gd/Encoders/PngEncoder.php
new file mode 100644
index 00000000..f93afb39
--- /dev/null
+++ b/src/Drivers/Gd/Encoders/PngEncoder.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace Intervention\Image\Drivers\Gd\Encoders;
+
+use Intervention\Image\Drivers\Abstract\Encoders\AbstractEncoder;
+use Intervention\Image\EncodedImage;
+use Intervention\Image\Interfaces\EncoderInterface;
+use Intervention\Image\Interfaces\ImageInterface;
+
+class PngEncoder extends AbstractEncoder implements EncoderInterface
+{
+    public function encode(ImageInterface $image): EncodedImage
+    {
+        $data = $this->getBuffered(function () use ($image) {
+            imagepng($image->getFrames()->first()->getCore());
+        });
+
+        return new EncodedImage($data, 'image/png');
+    }
+}
diff --git a/src/Drivers/Imagick/Encoders/PngEncoder.php b/src/Drivers/Imagick/Encoders/PngEncoder.php
new file mode 100644
index 00000000..8bdc03e6
--- /dev/null
+++ b/src/Drivers/Imagick/Encoders/PngEncoder.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace Intervention\Image\Drivers\Imagick\Encoders;
+
+use Imagick;
+use Intervention\Image\Drivers\Abstract\Encoders\AbstractEncoder;
+use Intervention\Image\EncodedImage;
+use Intervention\Image\Interfaces\EncoderInterface;
+use Intervention\Image\Interfaces\ImageInterface;
+
+class PngEncoder extends AbstractEncoder implements EncoderInterface
+{
+    public function encode(ImageInterface $image): EncodedImage
+    {
+        $format = 'png';
+        $compression = Imagick::COMPRESSION_ZIP;
+
+        $imagick = $image->getFrames()->first()->getCore();
+        $imagick->setFormat($format);
+        $imagick->setImageFormat($format);
+        $imagick->setCompression($compression);
+        $imagick->setImageCompression($compression);
+
+        return new EncodedImage($imagick->getImagesBlob(), 'image/png');
+    }
+}