Webp encoders for GD & ImageMagick

src/Drivers/Gd/Encoders/WebpEncoder.php

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+<?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 WebpEncoder extends AbstractEncoder implements EncoderInterface
+{
+    public function __construct(int $quality)
+    {
+        $this->quality = $quality;
+    }
+
+    public function encode(ImageInterface $image): EncodedImage
+    {
+        $data = $this->getBuffered(function () use ($image) {
+            imagewebp($image->getFrames()->first()->getCore(), null, $this->quality);
+        });
+
+        return new EncodedImage($data, 'image/webp');
+    }
+}

src/Drivers/Imagick/Encoders/WebpEncoder.php

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+<?php
+
+namespace Intervention\Image\Drivers\Imagick\Encoders;
+
+use Imagick;
+use ImagickPixel;
+use Intervention\Image\Drivers\Abstract\Encoders\AbstractEncoder;
+use Intervention\Image\EncodedImage;
+use Intervention\Image\Interfaces\EncoderInterface;
+use Intervention\Image\Interfaces\ImageInterface;
+
+class WebpEncoder extends AbstractEncoder implements EncoderInterface
+{
+    public function __construct(int $quality)
+    {
+        $this->quality = $quality;
+    }
+
+    public function encode(ImageInterface $image): EncodedImage
+    {
+        $format = 'webp';
+        $compression = Imagick::COMPRESSION_ZIP;
+
+        $imagick = $image->getFrames()->first()->getCore();
+        $imagick->setImageBackgroundColor(new ImagickPixel('transparent'));
+
+        $imagick = $imagick->mergeImageLayers(Imagick::LAYERMETHOD_MERGE);
+        $imagick->setFormat($format);
+        $imagick->setImageFormat($format);
+        $imagick->setCompression($compression);
+        $imagick->setImageCompression($compression);
+        $imagick->setImageCompressionQuality($this->quality);
+
+        return new EncodedImage($imagick->getImagesBlob(), 'image/webp');
+    }
+}

tests/Drivers/Gd/Encoders/WebpEncoderTest.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Intervention\Image\Tests\Drivers\Gd\Encoders;
+
+use Intervention\Image\Collection;
+use Intervention\Image\Drivers\Gd\Encoders\WebpEncoder;
+use Intervention\Image\Drivers\Gd\Frame;
+use Intervention\Image\Drivers\Gd\Image;
+use Intervention\MimeSniffer\MimeSniffer;
+use Intervention\MimeSniffer\Types\ImageWebp;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @requires extension gd
+ */
+final class WebpEncoderTest extends TestCase
+{
+    protected function getTestImage(): Image
+    {
+        $frame = new Frame(imagecreatetruecolor(3, 2));
+
+        return new Image(new Collection([$frame]));
+    }
+
+    public function testEncode(): void
+    {
+        $image = $this->getTestImage();
+        $encoder = new WebpEncoder(75);
+        $result = $encoder->encode($image);
+        $this->assertTrue(MimeSniffer::createFromString((string) $result)->matches(new ImageWebp()));
+    }
+}

tests/Drivers/Imagick/Encoders/WebpEncoderTest.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Intervention\Image\Tests\Drivers\Imagick\Encoders;
+
+use Imagick;
+use ImagickPixel;
+use Intervention\Image\Collection;
+use Intervention\Image\Drivers\Imagick\Encoders\WebpEncoder;
+use Intervention\Image\Drivers\Imagick\Frame;
+use Intervention\Image\Drivers\Imagick\Image;
+use Intervention\MimeSniffer\MimeSniffer;
+use Intervention\MimeSniffer\Types\ImageWebp;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @requires extension imagick
+ */
+final class WebpEncoderTest extends TestCase
+{
+    protected function getTestImage(): Image
+    {
+        $imagick = new Imagick();
+        $imagick->newImage(3, 2, new ImagickPixel('red'), 'png');
+        $frame = new Frame($imagick);
+
+        return new Image(new Collection([$frame]));
+    }
+
+    public function testEncode(): void
+    {
+        $image = $this->getTestImage();
+        $encoder = new WebpEncoder(75);
+        $result = $encoder->encode($image);
+        $this->assertTrue(MimeSniffer::createFromString((string) $result)->matches(new ImageWebp()));
+    }
+}