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<?php
$filename = "hex.png";
$im = imagecreatefrompng($filename);
list($width, $height, $type, $attr) = getimagesize($filename);

$bitsData = ["", "", ""];
$pixelNumber = 0;

for ($image = 0; $image < $height / 16; $image++) {
    for ($x = 0; $x < 32; $x++) {
        for ($y = 0; $y < 16; $y++) {
            $col = imagecolorat($im, $x, $y + $image * 16);
            if (($col >> 16) & (0xff == 255)) { $bitsData[0] .= "1"; } else { $bitsData[0] .= "0"; }
            if (($col >> 8) & (0xff == 255)) { $bitsData[1] .= "1"; } else { $bitsData[1] .= "0"; }
            if ($col & (0xff == 255)) { $bitsData[2] .= "1"; } else { $bitsData[2] .= "0"; }

            if ($pixelNumber > 0 && $pixelNumber % 8 == 7) {
                $bitsData[0] .= ",";
                $bitsData[1] .= ",";
                $bitsData[2] .= ",";
            }

            $pixelNumber++;
        }
    }
}

$aniData = [];
$toDec = function ($value) {
    return bindec($value);
};

for ($i = 0; $i < 3; $i++) {
    $tempData = explode(",", $bitsData[$i]);
    array_pop($tempData);
    $tempDataDec = array_map($toDec, $tempData);
    for ($j = 0; $j < count($tempDataDec); $j++) {
        $aniData[] = $tempDataDec[$j];
    }
}

echo "<pre>";
print_r('[{"data":{"aniData":[');
print_r(implode(",", $aniData));
print_r('],"aniType":1,"delays":300,"frameNum":' . $height / 16 . ',"pixelHeight":16,"pixelWidth":32},"dataType":0}]');
echo "</pre>";