Documentation & API reference
function 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
- drupal/
core/ modules/ system/ lib/ Drupal/ system/ Tests/ Image/ ToolkitGdTest.php, line 98 - Definition of Drupal\system\Tests\Image\ToolkitGdTest.
Class
- ToolkitGdTest
- Test the core GD image manipulation functions.
Namespace
Drupal\system\Tests\ImageCode
function testManipulations() {
// 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.jpg',
);
// Setup a list of tests to perform on each type.
$operations = array(
'resize' => array(
'function' => 'resize',
'arguments' => array(
20,
10,
),
'width' => 20,
'height' => 10,
'corners' => $default_corners,
),
'scale_x' => array(
'function' => 'scale',
'arguments' => array(
20,
NULL,
),
'width' => 20,
'height' => 10,
'corners' => $default_corners,
),
'scale_y' => array(
'function' => 'scale',
'arguments' => array(
NULL,
10,
),
'width' => 20,
'height' => 10,
'corners' => $default_corners,
),
'upscale_x' => array(
'function' => 'scale',
'arguments' => array(
80,
NULL,
TRUE,
),
'width' => 80,
'height' => 40,
'corners' => $default_corners,
),
'upscale_y' => array(
'function' => 'scale',
'arguments' => array(
NULL,
40,
TRUE,
),
'width' => 80,
'height' => 40,
'corners' => $default_corners,
),
'crop' => array(
'function' => 'crop',
'arguments' => array(
12,
4,
16,
12,
),
'width' => 16,
'height' => 12,
'corners' => array_fill(0, 4, $this->white),
),
'scale_and_crop' => array(
'function' => 'scale_and_crop',
'arguments' => array(
10,
8,
),
'width' => 10,
'height' => 8,
'corners' => array_fill(0, 4, $this->black),
),
);
// 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(
5,
0xff00ff,
),
// Fuchsia background.
'width' => 42,
'height' => 24,
'corners' => array_fill(0, 4, $this->fuchsia),
),
'rotate_90' => array(
'function' => 'rotate',
'arguments' => array(
90,
0xff00ff,
),
// Fuchsia background.
'width' => 20,
'height' => 40,
'corners' => array(
$this->transparent,
$this->red,
$this->green,
$this->blue,
),
),
'rotate_transparent_5' => array(
'function' => 'rotate',
'arguments' => array(
5,
),
'width' => 42,
'height' => 24,
'corners' => array_fill(0, 4, $this->transparent),
),
'rotate_transparent_90' => array(
'function' => 'rotate',
'arguments' => array(
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,
),
),
),
);
}
$manager = new ImageToolkitManager($this->container
->get('container.namespaces'));
foreach ($files as $file) {
foreach ($operations as $op => $values) {
// Load up a fresh image.
$image = image_load(drupal_get_path('module', 'simpletest') . '/files/' . $file, $manager
->createInstance('gd'));
if (!$image) {
$this
->fail(t('Could not load image %file.', array(
'%file' => $file,
)));
continue 2;
}
// All images should be converted to truecolor when loaded.
$image_truecolor = imageistruecolor($image->resource);
$this
->assertTrue($image_truecolor, format_string('Image %file after load is a truecolor image.', array(
'%file' => $file,
)));
if ($image->info['extension'] == 'gif') {
if ($op == 'desaturate') {
// Transparent GIFs and the imagefilter function don't work together.
$values['corners'][3][3] = 0;
}
}
// Perform our operation.
$function = 'image_' . $values['function'];
$arguments = array();
$arguments[] =& $image;
$arguments = array_merge($arguments, $values['arguments']);
call_user_func_array($function, $arguments);
// 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;
$correct_colors = TRUE;
// Check the real dimensions of the image first.
if (imagesy($image->resource) != $values['height'] || imagesx($image->resource) != $values['width']) {
$correct_dimensions_real = FALSE;
}
// Check that the image object has an accurate record of the dimensions.
if ($image->info['width'] != $values['width'] || $image->info['height'] != $values['height']) {
$correct_dimensions_object = FALSE;
}
$directory = $this->public_files_directory . '/imagetest';
file_prepare_directory($directory, FILE_CREATE_DIRECTORY);
image_save($image, $directory . '/' . $op . '.' . $image->info['extension']);
$this
->assertTrue($correct_dimensions_real, format_string('Image %file after %action action has proper dimensions.', array(
'%file' => $file,
'%action' => $op,
)));
$this
->assertTrue($correct_dimensions_object, format_string('Image %file object after %action action is reporting the proper height and width values.', array(
'%file' => $file,
'%action' => $op,
)));
// JPEG colors will always be messed up due to compression.
if ($image->info['extension'] != 'jpg') {
// Now check each of the corners to ensure color correctness.
foreach ($values['corners'] as $key => $corner) {
// Get the location of the corner.
switch ($key) {
case 0:
$x = 0;
$y = 0;
break;
case 1:
$x = $values['width'] - 1;
$y = 0;
break;
case 2:
$x = $values['width'] - 1;
$y = $values['height'] - 1;
break;
case 3:
$x = 0;
$y = $values['height'] - 1;
break;
}
$color = $this
->getPixelColor($image, $x, $y);
$correct_colors = $this
->colorsAreEqual($color, $corner);
$this
->assertTrue($correct_colors, format_string('Image %file object after %action action has the correct color placement at corner %corner.', array(
'%file' => $file,
'%action' => $op,
'%corner' => $key,
)));
}
}
}
}
}