jpeg2000 encoder (#19)

* jpeg2000 encoder

* allow image/x-jp2-codestream

* Refactor mime type detection

* Add BaseTestCase::assertMediaTypeJpeg2000()

* Add debug info

* Include alternative Jpeg 2000 magic byte signature

* Revert "Add debug info"

This reverts commit 5a656d3.

* Reduce sample size

* Refactor Jpeg200EncoderTest::class

---------

Co-authored-by: Oliver Vogel <[email protected]>

src/Encoders/Jpeg2000Encoder.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Intervention\Image\Drivers\Vips\Encoders;
+
+use Intervention\Image\EncodedImage;
+use Intervention\Image\Encoders\Jpeg2000Encoder as GenericJpeg2000Encoder;
+use Intervention\Image\Interfaces\ImageInterface;
+use Intervention\Image\Interfaces\SpecializedInterface;
+
+class Jpeg2000Encoder extends GenericJpeg2000Encoder implements SpecializedInterface
+{
+    /**
+     * {@inheritdoc}
+     *
+     * @see EncoderInterface::function()
+     */
+    public function encode(ImageInterface $image): EncodedImage
+    {
+        $result = $image->core()->native()->writeToBuffer('.j2k', [
+            'Q' => $this->quality,
+            'strip' => true,
+            'lossless' => false,
+        ]);
+
+        return new EncodedImage($result, 'image/jp2');
+    }
+}

tests/BaseTestCase.php

@@ -4,6 +4,7 @@
 
 namespace Intervention\Image\Drivers\Vips\Tests;
 
+use finfo;
 use Intervention\Image\Colors\Rgb\Channels\Alpha;
 use Intervention\Image\Colors\Rgb\Channels\Blue;
 use Intervention\Image\Colors\Rgb\Channels\Green;
@@ -121,12 +122,7 @@ protected function assertColor(int $r, int $g, int $b, int $a, ColorInterface $c
 
     protected function assertMediaType(string|array $allowed, string|EncodedImage $input): void
     {
-        $pointer = fopen('php://temp', 'rw');
-        fputs($pointer, (string) $input);
-        rewind($pointer);
-        $detected = mime_content_type($pointer);
-        fclose($pointer);
-
+        $detected = (new finfo(FILEINFO_MIME_TYPE))->buffer((string) $input);
         $allowed = is_string($allowed) ? [$allowed] : $allowed;
         $this->assertTrue(
             in_array($detected, $allowed),

tests/Unit/Encoders/Jpeg200EncoderTest.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Intervention\Image\Drivers\Vips\Tests\Unit\Encoders;
+
+use Intervention\Image\Drivers\Vips\Driver;
+use Intervention\Image\Drivers\Vips\Encoders\Jpeg2000Encoder;
+use Intervention\Image\Drivers\Vips\Tests\BaseTestCase;
+use Intervention\Image\EncodedImage;
+use PHPUnit\Framework\Attributes\CoversClass;
+
+#[CoversClass(Jpeg2000Encoder::class)]
+final class Jpeg200EncoderTest extends BaseTestCase
+{
+    public function testEncode(): void
+    {
+        $image = (new Driver())->createImage(3, 2);
+        $encoder = new Jpeg2000Encoder(75);
+        $encoder->setDriver(new Driver());
+        $result = $encoder->encode($image);
+        $this->assertEquals('image/jp2', $result->mimetype());
+        $this->assertTrue($this->isJpeg2000($result), 'Encoding result is not in Jpeg 2000 format.');
+    }
+
+    private function isJpeg2000(string|EncodedImage $input): bool
+    {
+        return 1 === preg_match(
+            "/^0000000C6A5020200D0A870A|FF4FFF51/",
+            strtoupper(substr(bin2hex((string) $input), 0, 24))
+        );
+    }
+}