Count the number of colors in the image
| public countColors ( integer $max = null ) : integer | ||
| $max | integer | Stop parsing the image if more colors than $max were found |
| return | integer | The number of image colors |
/**
* Tests the countColors() method.
*/
public function testCountColors()
{
$image = imagecreatetruecolor(100, 100);
imagealphablending($image, false);
imagefill($image, 0, 0, imagecolorallocatealpha($image, 255, 0, 0, 0));
imagefilledrectangle($image, 50, 0, 100, 50, imagecolorallocatealpha($image, 0, 255, 0, 0));
imagefilledrectangle($image, 0, 50, 50, 100, imagecolorallocatealpha($image, 0, 0, 255, 0));
imagefilledrectangle($image, 50, 50, 100, 100, imagecolorallocatealpha($image, 0, 0, 0, 127));
$image = new GdImage($image);
$this->assertEquals(4, $image->countColors());
$this->assertEquals(4, $image->countColors(256));
$this->assertEquals(2, $image->countColors(1));
}
