imagecolorstotal

<?php     {

       $img = $this->manager()->make('tests/images/trim.png');

       $img->limitColors(4);

       $this->assertLessThanOrEqual(5, imagecolorstotal($img->getCore()));

    }



    public function testLimitColorsKeepTransparency()

<?php     {

        $img = $this->manager()->make('tests/images/star.png');

        $img->limitColors(16);

        $this->assertLessThanOrEqual(17, imagecolorstotal($img->getCore()));

        $this->assertTransparentPosition($img, 0, 0);

        $this->assertColorAtPosition('#0c02b4', $img, 6, 12);

        $this->assertColorAtPosition('#fcbe04', $img, 22, 24);

<?php     {

        $img = $this->manager()->make('tests/images/star.png');

        $img->limitColors(64, '#00ff00');

        $this->assertLessThanOrEqual(65, imagecolorstotal($img->getCore()));

        $this->assertTransparentPosition($img, 0, 0);

        $this->assertColorAtPosition('#04f204', $img, 12, 10);

        $this->assertColorAtPosition('#e40214', $img, 16, 21);