Unexpected DecoderException thrown

[ADmad]

Describe the bug

DecoderException is thrown when trying to read a heic image created by lib itself. The error only occurs for heic and not for other image types. Also the exception only occurs on Ubuntu 24.04, it does not happen on 22.04, so it's likely an environment issue and not an issue with the lib, but I needed help to figure how to handle it.

The exact error can be seen here:
https://github.com/thephpleague/glide/actions/runs/11540990914/job/32122452702?pr=400#step:5:29

Code Example

use Intervention\Image\Encoders\MediaTypeEncoder;
use Intervention\Image\ImageManager;

$manager = ImageManager::imagick();
$img = $manager->read($manager->create(100, 100)->encode(new MediaTypeEncoder('image/heic'))->toFilePointer());

Expected behavior

No exception to be thrown.

Environment (please complete the following information):

• PHP Version: PHP 8.3
• OS: Ubuntu 24.04
• Intervention Image Version: 3.9.1
• GD or Imagick: Imagick

[olivervogel]

Thanks for reporting.

This seems to be an issue with Imagemagick/Imagick installed with Ubuntu 24.04. I have extracted the entire process and recreated it using only “native” Imagick calls. This is what Intervention Image does under the hood.

image/tests/Unit/HeicTest.php

Lines 15 to 36 in 24f8960

	// create
	$background = new ImagickPixel('rgba(255, 255, 255, 0)');
	$imagick = new Imagick();
	$imagick->newImage(100, 100, $background, 'png');
	$imagick->setType(Imagick::IMGTYPE_UNDEFINED);
	$imagick->setImageType(Imagick::IMGTYPE_UNDEFINED);
	$imagick->setColorspace(Imagick::COLORSPACE_SRGB);
	$imagick->setImageResolution(96, 96);
	$imagick->setImageBackgroundColor($background);
	// encode
	$imagick->setFormat('HEIC');
	$imagick->setImageFormat('HEIC');
	$imagick->setCompressionQuality(75);
	$imagick->setImageCompressionQuality(75);
	$encoded = $imagick->getImagesBlob();
	// re-read
	$imagick = new Imagick();
	$imagick->readImageBlob($encoded);
	$this->assertInstanceOf(Imagick::class, $imagick);

You can see that the result of Imagick::getImagesBlob() is an empty string. This then leads to an exception when reading in again.