| public countColors ( integer $max = null ) : integer | ||
| $max | integer | Stop parsing the image if more colors than $max were found |
| return | integer | The number of image colors |
public function countColors($max = null)
{
if (!imageistruecolor($this->gdResource)) {
return imagecolorstotal($this->gdResource);
}
$colors = array();
$width = imagesx($this->gdResource);
$height = imagesy($this->gdResource);
for ($x = 0; $x < $width; $x++) {
for ($y = 0; $y < $height; $y++) {
$colors[imagecolorat($this->gdResource, $x, $y)] = true;
if ($max !== null && count($colors) > $max) {
break 2;
}
}
}
return count($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));
}
