protected function InterlaceTest::isPngInterlaced in Image Effects 8.3

Same name and namespace in other branches

1. 8 tests/src/Functional/Effect/InterlaceTest.php \Drupal\Tests\image_effects\Functional\Effect\InterlaceTest::isPngInterlaced()
2. 8.2 tests/src/Functional/Effect/InterlaceTest.php \Drupal\Tests\image_effects\Functional\Effect\InterlaceTest::isPngInterlaced()

Checks if this is an interlaced PNG.

Parameters

\Drupal\Core\Image\ImageInterface $image: An image object that need to be checked.

Return value

bool Returns TRUE on success or FALSE on failure.

See also

http://stackoverflow.com/questions/14235600/php-test-if-image-is-interlaced

1 call to InterlaceTest::isPngInterlaced()

InterlaceTest::testInterlaceEffect in tests/src/Functional/Effect/InterlaceTest.php

Interlace effect test.

File

tests/src/Functional/Effect/InterlaceTest.php, line 83

Class

InterlaceTest

Interlace effect test.

Namespace

Drupal\Tests\image_effects\Functional\Effect

Code

protected function isPngInterlaced(ImageInterface $image) {
  $source = $image
    ->getSource();
  $real_path = $this->container
    ->get('file_system')
    ->realpath($source);
  $handle = fopen($real_path, "r");
  $contents = fread($handle, 32);
  fclose($handle);
  return ord($contents[28]) != 0;
}