public function ToolkitGdTest::testManipulations in Drupal 8

Same name and namespace in other branches

1. 9 core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php \Drupal\KernelTests\Core\Image\ToolkitGdTest::testManipulations()

Since PHP can't visually check that our images have been manipulated properly, build a list of expected color values for each of the corners and the expected height and widths for the final images.

File

core/tests/Drupal/KernelTests/Core/Image/ToolkitGdTest.php, line 106

Class

ToolkitGdTest

Tests that core image manipulations work properly: scale, resize, rotate, crop, scale and crop, and desaturate.

Namespace

Drupal\KernelTests\Core\Image

Code

public function testManipulations() {

  // Test that the image factory is set to use the GD toolkit.
  $this
    ->assertEqual($this->imageFactory
    ->getToolkitId(), 'gd', 'The image factory is set to use the \'gd\' image toolkit.');

  // Test the list of supported extensions.
  $expected_extensions = [
    'png',
    'gif',
    'jpeg',
    'jpg',
    'jpe',
  ];
  $supported_extensions = $this->imageFactory
    ->getSupportedExtensions();
  $this
    ->assertEqual($expected_extensions, array_intersect($expected_extensions, $supported_extensions));

  // Test that the supported extensions map to correct internal GD image
  // types.
  $expected_image_types = [
    'png' => IMAGETYPE_PNG,
    'gif' => IMAGETYPE_GIF,
    'jpeg' => IMAGETYPE_JPEG,
    'jpg' => IMAGETYPE_JPEG,
    'jpe' => IMAGETYPE_JPEG,
  ];
  $image = $this->imageFactory
    ->get();
  foreach ($expected_image_types as $extension => $expected_image_type) {
    $image_type = $image
      ->getToolkit()
      ->extensionToImageType($extension);
    $this
      ->assertSame($expected_image_type, $image_type);
  }

  // Typically the corner colors will be unchanged. These colors are in the
  // order of top-left, top-right, bottom-right, bottom-left.
  $default_corners = [
    $this->red,
    $this->green,
    $this->blue,
    $this->transparent,
  ];

  // A list of files that will be tested.
  $files = [
    'image-test.png',
    'image-test.gif',
    'image-test-no-transparency.gif',
    'image-test.jpg',
  ];

  // Setup a list of tests to perform on each type.
  $operations = [
    'resize' => [
      'function' => 'resize',
      'arguments' => [
        'width' => 20,
        'height' => 10,
      ],
      'width' => 20,
      'height' => 10,
      'corners' => $default_corners,
    ],
    'scale_x' => [
      'function' => 'scale',
      'arguments' => [
        'width' => 20,
      ],
      'width' => 20,
      'height' => 10,
      'corners' => $default_corners,
    ],
    'scale_y' => [
      'function' => 'scale',
      'arguments' => [
        'height' => 10,
      ],
      'width' => 20,
      'height' => 10,
      'corners' => $default_corners,
    ],
    'upscale_x' => [
      'function' => 'scale',
      'arguments' => [
        'width' => 80,
        'upscale' => TRUE,
      ],
      'width' => 80,
      'height' => 40,
      'corners' => $default_corners,
    ],
    'upscale_y' => [
      'function' => 'scale',
      'arguments' => [
        'height' => 40,
        'upscale' => TRUE,
      ],
      'width' => 80,
      'height' => 40,
      'corners' => $default_corners,
    ],
    'crop' => [
      'function' => 'crop',
      'arguments' => [
        'x' => 12,
        'y' => 4,
        'width' => 16,
        'height' => 12,
      ],
      'width' => 16,
      'height' => 12,
      'corners' => array_fill(0, 4, $this->white),
    ],
    'scale_and_crop' => [
      'function' => 'scale_and_crop',
      'arguments' => [
        'width' => 10,
        'height' => 8,
      ],
      'width' => 10,
      'height' => 8,
      'corners' => array_fill(0, 4, $this->black),
    ],
    'convert_jpg' => [
      'function' => 'convert',
      'width' => 40,
      'height' => 20,
      'arguments' => [
        'extension' => 'jpeg',
      ],
      'corners' => $default_corners,
    ],
    'convert_gif' => [
      'function' => 'convert',
      'width' => 40,
      'height' => 20,
      'arguments' => [
        'extension' => 'gif',
      ],
      'corners' => $default_corners,
    ],
    'convert_png' => [
      'function' => 'convert',
      'width' => 40,
      'height' => 20,
      'arguments' => [
        'extension' => 'png',
      ],
      'corners' => $default_corners,
    ],
  ];

  // Systems using non-bundled GD2 don't have imagerotate. Test if available.
  // @todo Remove the version check once
  //   https://www.drupal.org/project/drupal/issues/2670966 is resolved.
  if (function_exists('imagerotate') && version_compare(phpversion(), '7.0.26') < 0) {
    $operations += [
      'rotate_5' => [
        'function' => 'rotate',
        // Fuchsia background.
        'arguments' => [
          'degrees' => 5,
          'background' => '#FF00FF',
        ],
        'width' => 41,
        'height' => 23,
        'corners' => array_fill(0, 4, $this->fuchsia),
      ],
      'rotate_90' => [
        'function' => 'rotate',
        // Fuchsia background.
        'arguments' => [
          'degrees' => 90,
          'background' => '#FF00FF',
        ],
        'width' => 20,
        'height' => 40,
        'corners' => [
          $this->transparent,
          $this->red,
          $this->green,
          $this->blue,
        ],
      ],
      'rotate_transparent_5' => [
        'function' => 'rotate',
        'arguments' => [
          'degrees' => 5,
        ],
        'width' => 41,
        'height' => 23,
        'corners' => array_fill(0, 4, $this->rotateTransparent),
      ],
      'rotate_transparent_90' => [
        'function' => 'rotate',
        'arguments' => [
          'degrees' => 90,
        ],
        'width' => 20,
        'height' => 40,
        'corners' => [
          $this->transparent,
          $this->red,
          $this->green,
          $this->blue,
        ],
      ],
    ];
  }

  // Systems using non-bundled GD2 don't have imagefilter. Test if available.
  if (function_exists('imagefilter')) {
    $operations += [
      'desaturate' => [
        'function' => 'desaturate',
        'arguments' => [],
        'height' => 20,
        'width' => 40,
        // Grayscale corners are a bit funky. Each of the corners are a shade of
        // gray. The values of these were determined simply by looking at the
        // final image to see what desaturated colors end up being.
        'corners' => [
          array_fill(0, 3, 76) + [
            3 => 0,
          ],
          array_fill(0, 3, 149) + [
            3 => 0,
          ],
          array_fill(0, 3, 29) + [
            3 => 0,
          ],
          array_fill(0, 3, 225) + [
            3 => 127,
          ],
        ],
      ],
    ];
  }

  // Prepare a directory for test file results.
  $directory = Settings::get('file_public_path') . '/imagetest';
  \Drupal::service('file_system')
    ->prepareDirectory($directory, FileSystemInterface::CREATE_DIRECTORY);
  foreach ($files as $file) {
    foreach ($operations as $op => $values) {

      // Load up a fresh image.
      $image = $this->imageFactory
        ->get('core/tests/fixtures/files/' . $file);
      $toolkit = $image
        ->getToolkit();
      if (!$image
        ->isValid()) {
        $this
          ->fail(new FormattableMarkup('Could not load image %file.', [
          '%file' => $file,
        ]));
        continue 2;
      }
      $image_original_type = $image
        ->getToolkit()
        ->getType();

      // All images should be converted to truecolor when loaded.
      $image_truecolor = imageistruecolor($toolkit
        ->getResource());
      $this
        ->assertTrue($image_truecolor, new FormattableMarkup('Image %file after load is a truecolor image.', [
        '%file' => $file,
      ]));

      // Store the original GD resource.
      $old_res = $toolkit
        ->getResource();

      // Perform our operation.
      $image
        ->apply($values['function'], $values['arguments']);

      // If the operation replaced the resource, check that the old one has
      // been destroyed.
      $new_res = $toolkit
        ->getResource();
      if ($new_res !== $old_res) {

        // @todo In https://www.drupal.org/node/3133236 convert this to
        //   $this->assertIsNotResource($old_res).
        $this
          ->assertFalse(is_resource($old_res), new FormattableMarkup("'%operation' destroyed the original resource.", [
          '%operation' => $values['function'],
        ]));
      }

      // To keep from flooding the test with assert values, make a general
      // value for whether each group of values fail.
      $correct_dimensions_real = TRUE;
      $correct_dimensions_object = TRUE;
      if (imagesy($toolkit
        ->getResource()) != $values['height'] || imagesx($toolkit
        ->getResource()) != $values['width']) {
        $correct_dimensions_real = FALSE;
      }

      // Check that the image object has an accurate record of the dimensions.
      if ($image
        ->getWidth() != $values['width'] || $image
        ->getHeight() != $values['height']) {
        $correct_dimensions_object = FALSE;
      }
      $file_path = $directory . '/' . $op . image_type_to_extension($image
        ->getToolkit()
        ->getType());
      $image
        ->save($file_path);
      $this
        ->assertTrue($correct_dimensions_real, new FormattableMarkup('Image %file after %action action has proper dimensions.', [
        '%file' => $file,
        '%action' => $op,
      ]));
      $this
        ->assertTrue($correct_dimensions_object, new FormattableMarkup('Image %file object after %action action is reporting the proper height and width values.', [
        '%file' => $file,
        '%action' => $op,
      ]));

      // JPEG colors will always be messed up due to compression. So we skip
      // these tests if the original or the result is in jpeg format.
      if ($image
        ->getToolkit()
        ->getType() != IMAGETYPE_JPEG && $image_original_type != IMAGETYPE_JPEG) {

        // Now check each of the corners to ensure color correctness.
        foreach ($values['corners'] as $key => $corner) {

          // The test gif that does not have transparency color set is a
          // special case.
          if ($file === 'image-test-no-transparency.gif') {
            if ($op == 'desaturate') {

              // For desaturating, keep the expected color from the test
              // data, but set alpha channel to fully opaque.
              $corner[3] = 0;
            }
            elseif ($corner === $this->transparent) {

              // Set expected pixel to yellow where the others have
              // transparent.
              $corner = $this->yellow;
            }
          }

          // Get the location of the corner.
          switch ($key) {
            case 0:
              $x = 0;
              $y = 0;
              break;
            case 1:
              $x = $image
                ->getWidth() - 1;
              $y = 0;
              break;
            case 2:
              $x = $image
                ->getWidth() - 1;
              $y = $image
                ->getHeight() - 1;
              break;
            case 3:
              $x = 0;
              $y = $image
                ->getHeight() - 1;
              break;
          }
          $color = $this
            ->getPixelColor($image, $x, $y);

          // We also skip the color test for transparency for gif <-> png
          // conversion. The convert operation cannot handle that correctly.
          if ($image
            ->getToolkit()
            ->getType() == $image_original_type || $corner != $this->transparent) {
            $correct_colors = $this
              ->colorsAreEqual($color, $corner);
            $this
              ->assertTrue($correct_colors, new FormattableMarkup('Image %file object after %action action has the correct color placement at corner %corner.', [
              '%file' => $file,
              '%action' => $op,
              '%corner' => $key,
            ]));
          }
        }
      }

      // Check that saved image reloads without raising PHP errors.
      $image_reloaded = $this->imageFactory
        ->get($file_path);
      $resource = $image_reloaded
        ->getToolkit()
        ->getResource();
    }
  }

  // Test creation of image from scratch, and saving to storage.
  foreach ([
    IMAGETYPE_PNG,
    IMAGETYPE_GIF,
    IMAGETYPE_JPEG,
  ] as $type) {
    $image = $this->imageFactory
      ->get();
    $image
      ->createNew(50, 20, image_type_to_extension($type, FALSE), '#ffff00');
    $file = 'from_null' . image_type_to_extension($type);
    $file_path = $directory . '/' . $file;
    $this
      ->assertEqual(50, $image
      ->getWidth(), new FormattableMarkup('Image file %file has the correct width.', [
      '%file' => $file,
    ]));
    $this
      ->assertEqual(20, $image
      ->getHeight(), new FormattableMarkup('Image file %file has the correct height.', [
      '%file' => $file,
    ]));
    $this
      ->assertEqual(image_type_to_mime_type($type), $image
      ->getMimeType(), new FormattableMarkup('Image file %file has the correct MIME type.', [
      '%file' => $file,
    ]));
    $this
      ->assertTrue($image
      ->save($file_path), new FormattableMarkup('Image %file created anew from a null image was saved.', [
      '%file' => $file,
    ]));

    // Reload saved image.
    $image_reloaded = $this->imageFactory
      ->get($file_path);
    if (!$image_reloaded
      ->isValid()) {
      $this
        ->fail(new FormattableMarkup('Could not load image %file.', [
        '%file' => $file,
      ]));
      continue;
    }
    $this
      ->assertEqual(50, $image_reloaded
      ->getWidth(), new FormattableMarkup('Image file %file has the correct width.', [
      '%file' => $file,
    ]));
    $this
      ->assertEqual(20, $image_reloaded
      ->getHeight(), new FormattableMarkup('Image file %file has the correct height.', [
      '%file' => $file,
    ]));
    $this
      ->assertEqual(image_type_to_mime_type($type), $image_reloaded
      ->getMimeType(), new FormattableMarkup('Image file %file has the correct MIME type.', [
      '%file' => $file,
    ]));
    if ($image_reloaded
      ->getToolkit()
      ->getType() == IMAGETYPE_GIF) {
      $this
        ->assertEqual('#ffff00', $image_reloaded
        ->getToolkit()
        ->getTransparentColor(), new FormattableMarkup('Image file %file has the correct transparent color channel set.', [
        '%file' => $file,
      ]));
    }
    else {
      $this
        ->assertEqual(NULL, $image_reloaded
        ->getToolkit()
        ->getTransparentColor(), new FormattableMarkup('Image file %file has no color channel set.', [
        '%file' => $file,
      ]));
    }
  }

  // Test failures of the 'create_new' operation.
  $image = $this->imageFactory
    ->get();
  $image
    ->createNew(-50, 20);
  $this
    ->assertFalse($image
    ->isValid(), 'CreateNew with negative width fails.');
  $image
    ->createNew(50, 20, 'foo');
  $this
    ->assertFalse($image
    ->isValid(), 'CreateNew with invalid extension fails.');
  $image
    ->createNew(50, 20, 'gif', '#foo');
  $this
    ->assertFalse($image
    ->isValid(), 'CreateNew with invalid color hex string fails.');
  $image
    ->createNew(50, 20, 'gif', '#ff0000');
  $this
    ->assertTrue($image
    ->isValid(), 'CreateNew with valid arguments validates the Image.');
}