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function ToolkitGdTest::testManipulations in Zircon Profile 8

Same name and namespace in other branches
  1. 8.0 core/modules/system/src/Tests/Image/ToolkitGdTest.php \Drupal\system\Tests\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/modules/system/src/Tests/Image/ToolkitGdTest.php, line 109
Contains \Drupal\system\Tests\Image\ToolkitGdTest.

Class

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

Namespace

Drupal\system\Tests\Image

Code

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.');

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

  // A list of files that will be tested.
  $files = array(
    '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 = array(
    'resize' => array(
      'function' => 'resize',
      'arguments' => array(
        'width' => 20,
        'height' => 10,
      ),
      'width' => 20,
      'height' => 10,
      'corners' => $default_corners,
    ),
    'scale_x' => array(
      'function' => 'scale',
      'arguments' => array(
        'width' => 20,
      ),
      'width' => 20,
      'height' => 10,
      'corners' => $default_corners,
    ),
    'scale_y' => array(
      'function' => 'scale',
      'arguments' => array(
        'height' => 10,
      ),
      'width' => 20,
      'height' => 10,
      'corners' => $default_corners,
    ),
    'upscale_x' => array(
      'function' => 'scale',
      'arguments' => array(
        'width' => 80,
        'upscale' => TRUE,
      ),
      'width' => 80,
      'height' => 40,
      'corners' => $default_corners,
    ),
    'upscale_y' => array(
      'function' => 'scale',
      'arguments' => array(
        'height' => 40,
        'upscale' => TRUE,
      ),
      'width' => 80,
      'height' => 40,
      'corners' => $default_corners,
    ),
    'crop' => array(
      'function' => 'crop',
      'arguments' => array(
        'x' => 12,
        'y' => 4,
        'width' => 16,
        'height' => 12,
      ),
      'width' => 16,
      'height' => 12,
      'corners' => array_fill(0, 4, $this->white),
    ),
    'scale_and_crop' => array(
      'function' => 'scale_and_crop',
      'arguments' => array(
        'width' => 10,
        'height' => 8,
      ),
      'width' => 10,
      'height' => 8,
      'corners' => array_fill(0, 4, $this->black),
    ),
    'convert_jpg' => array(
      'function' => 'convert',
      'width' => 40,
      'height' => 20,
      'arguments' => array(
        'extension' => 'jpeg',
      ),
      'corners' => $default_corners,
    ),
    'convert_gif' => array(
      'function' => 'convert',
      'width' => 40,
      'height' => 20,
      'arguments' => array(
        'extension' => 'gif',
      ),
      'corners' => $default_corners,
    ),
    'convert_png' => array(
      'function' => 'convert',
      'width' => 40,
      'height' => 20,
      'arguments' => array(
        'extension' => 'png',
      ),
      'corners' => $default_corners,
    ),
  );

  // Systems using non-bundled GD2 don't have imagerotate. Test if available.
  if (function_exists('imagerotate')) {
    $operations += array(
      'rotate_5' => array(
        'function' => 'rotate',
        'arguments' => array(
          'degrees' => 5,
          'background' => '#FF00FF',
        ),
        // Fuchsia background.
        'width' => 42,
        'height' => 24,
        'corners' => array_fill(0, 4, $this->fuchsia),
      ),
      'rotate_90' => array(
        'function' => 'rotate',
        'arguments' => array(
          'degrees' => 90,
          'background' => '#FF00FF',
        ),
        // Fuchsia background.
        'width' => 20,
        'height' => 40,
        'corners' => array(
          $this->transparent,
          $this->red,
          $this->green,
          $this->blue,
        ),
      ),
      'rotate_transparent_5' => array(
        'function' => 'rotate',
        'arguments' => array(
          'degrees' => 5,
        ),
        'width' => 42,
        'height' => 24,
        'corners' => array_fill(0, 4, $this->rotateTransparent),
      ),
      'rotate_transparent_90' => array(
        'function' => 'rotate',
        'arguments' => array(
          'degrees' => 90,
        ),
        'width' => 20,
        'height' => 40,
        'corners' => array(
          $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 += array(
      'desaturate' => array(
        'function' => 'desaturate',
        'arguments' => array(),
        '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(
          array_fill(0, 3, 76) + array(
            3 => 0,
          ),
          array_fill(0, 3, 149) + array(
            3 => 0,
          ),
          array_fill(0, 3, 29) + array(
            3 => 0,
          ),
          array_fill(0, 3, 225) + array(
            3 => 127,
          ),
        ),
      ),
    );
  }

  // Prepare a directory for test file results.
  $directory = $this->publicFilesDirectory . '/imagetest';
  file_prepare_directory($directory, FILE_CREATE_DIRECTORY);
  foreach ($files as $file) {
    foreach ($operations as $op => $values) {

      // Load up a fresh image.
      $image = $this->imageFactory
        ->get(drupal_get_path('module', 'simpletest') . '/files/' . $file);
      $toolkit = $image
        ->getToolkit();
      if (!$image
        ->isValid()) {
        $this
          ->fail(SafeMarkup::format('Could not load image %file.', array(
          '%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, SafeMarkup::format('Image %file after load is a truecolor image.', array(
        '%file' => $file,
      )));
      if ($image
        ->getToolkit()
        ->getType() == IMAGETYPE_GIF) {
        if ($op == 'desaturate') {

          // Transparent GIFs and the imagefilter function don't work together.
          $values['corners'][3][3] = 0;
        }
      }

      // 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) {
        $this
          ->assertFalse(is_resource($old_res), SafeMarkup::format("'%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;

      // PHP 5.5 GD bug: https://bugs.php.net/bug.php?id=65148. PHP 5.5 GD
      // rotates differently then it did in PHP 5.4 resulting in different
      // dimensions then what math teaches us. For the test images, the
      // dimensions will be 1 pixel smaller in both dimensions (though other
      // tests have shown a difference of 0 to 3 pixels in both dimensions.
      // @todo: if and when the PHP bug gets solved, add an upper limit
      //   version check.
      // @todo: in [#1551686] the dimension calculations for rotation are
      //   reworked. That issue should also check if these tests can be made
      //   more robust.
      if (version_compare(PHP_VERSION, '5.5', '>=') && $values['function'] === 'rotate' && $values['arguments']['degrees'] % 90 != 0) {
        $values['height']--;
        $values['width']--;
      }
      if (imagesy($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, SafeMarkup::format('Image %file after %action action has proper dimensions.', array(
        '%file' => $file,
        '%action' => $op,
      )));
      $this
        ->assertTrue($correct_dimensions_object, SafeMarkup::format('Image %file object after %action action is reporting the proper height and width values.', array(
        '%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 has yellow where the
          // others have transparent.
          if ($file === 'image-test-no-transparency.gif' && $corner === $this->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, SafeMarkup::format('Image %file object after %action action has the correct color placement at corner %corner.', array(
              '%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 (array(
    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(), SafeMarkup::format('Image file %file has the correct width.', array(
      '%file' => $file,
    )));
    $this
      ->assertEqual(20, $image
      ->getHeight(), SafeMarkup::format('Image file %file has the correct height.', array(
      '%file' => $file,
    )));
    $this
      ->assertEqual(image_type_to_mime_type($type), $image
      ->getMimeType(), SafeMarkup::format('Image file %file has the correct MIME type.', array(
      '%file' => $file,
    )));
    $this
      ->assertTrue($image
      ->save($file_path), SafeMarkup::format('Image %file created anew from a null image was saved.', array(
      '%file' => $file,
    )));

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