/**
* Tests the JImage::crop() method. To test this we create an image that contains a red rectangle
* of a certain size [Rectangle1]. Inside of that rectangle [Rectangle1] we draw a white
* rectangle [Rectangle2] that is exactly two pixels smaller in width and height than its parent
* rectangle [Rectangle1]. Then we crop the image to the exact coordinates of Rectangle1 and
* verify both it's corners and the corners inside of it.
*
* @param mixed $startHeight The original image height.
* @param mixed $startWidth The original image width.
* @param integer $cropHeight The height of the cropped image.
* @param integer $cropWidth The width of the cropped image.
* @param integer $cropTop The pixel offset from the top for the cropped image.
* @param integer $cropLeft The pixel offset from the left for the cropped image.
* @param boolean $transparent True to add transparency to the image.
*
* @return void
*
* @dataProvider getCropData
* @since 11.3
*/
public function testCrop($startHeight, $startWidth, $cropHeight, $cropWidth, $cropTop, $cropLeft, $transparent = false)
{
// Create a image handle of the correct size.
$imageHandle = imagecreatetruecolor($startWidth, $startHeight);
// If the transparent flag is true set black to transparent.
if ($transparent) {
imagecolortransparent($imageHandle, imagecolorallocate($imageHandle, 0, 0, 0));
}
// Define red and white.
$red = imagecolorallocate($imageHandle, 255, 0, 0);
$white = imagecolorallocate($imageHandle, 255, 255, 255);
// Draw a red rectangle in the crop area.
imagefilledrectangle($imageHandle, $cropLeft, $cropTop, $cropLeft + $cropWidth, $cropTop + $cropHeight, $red);
// Draw a white rectangle one pixel inside the crop area.
imagefilledrectangle($imageHandle, $cropLeft + 1, $cropTop + 1, $cropLeft + $cropWidth - 2, $cropTop + $cropHeight - 2, $white);
// Create a new JImageInspector from the image handle.
$image = new JImageInspector($imageHandle);
// Crop the image to specifications.
$image->crop($cropWidth, $cropHeight, $cropLeft, $cropTop, false);
// Verify that the cropped image is the correct size.
$this->assertEquals($cropHeight, imagesy($image->getClassProperty('handle')));
$this->assertEquals($cropWidth, imagesx($image->getClassProperty('handle')));
// Validate the correct pixels for the corners.
// Top/Left
$this->assertEquals($red, imagecolorat($image->getClassProperty('handle'), 0, 0));
$this->assertEquals($white, imagecolorat($image->getClassProperty('handle'), 1, 1));
// Top/Right
$this->assertEquals($red, imagecolorat($image->getClassProperty('handle'), 0, $cropHeight - 1));
$this->assertEquals($white, imagecolorat($image->getClassProperty('handle'), 1, $cropHeight - 2));
// Bottom/Left
$this->assertEquals($red, imagecolorat($image->getClassProperty('handle'), $cropWidth - 1, 0));
$this->assertEquals($white, imagecolorat($image->getClassProperty('handle'), $cropWidth - 2, 1));
// Bottom/Right
$this->assertEquals($red, imagecolorat($image->getClassProperty('handle'), $cropWidth - 1, $cropHeight - 1));
$this->assertEquals($white, imagecolorat($image->getClassProperty('handle'), $cropWidth - 2, $cropHeight - 2));
}
