public function spriteDirRecur($dir)
{
$nbr = countSubDir($dir);
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) != FALSE) {
if ($file != '.' && $file != '..') {
if (is_dir($dir . '/' . $file)) {
$this->spriteDirRecur($dir . '/' . $file);
$this->ib++;
}
if (is_png($dir . '/' . $file)) {
$this->png_file[] = imagecreatefrompng($dir . '/' . $file);
}
}
}
closedir($dh);
}
}
if ($this->ib == $this->nbr) {
if (!empty($this->padding)) {
$this->spriteToPngPadding($this->png_file, $this->png_name);
} else {
$this->spriteToPng($this->png_file, $this->png_name);
}
}
}
$arr = unpack("c*", $length_bin);
$length = 0;
for ($i = 1; $i <= 4; $i++) {
$length += pow(256, 4 - $i) * $arr[$i];
}
return $length + 12;
}
function next_chunk($binary, $chunk_head_position)
{
return $chunk_head_position + get_chunk_length($binary, $chunk_head_position);
}
function is_animated($binary, $length)
{
$chunk_head_position = 8;
while ($chunk_head_position < $length) {
if (chunk_type_compare($binary, "IDAT", $chunk_head_position)) {
return false;
}
if (chunk_type_compare($binary, "acTL", $chunk_head_position)) {
return true;
}
$chunk_head_position = next_chunk($binary, $chunk_head_position);
}
return false;
}
$filename = $argv[1];
$f = fopen($filename, "rb");
$header = fread($f, 1024);
fclose($f);
var_dump(is_png($header) && is_animated($header, 1024));
function make_thumbnail($file)
{
$image = null;
if (is_jpg($file["ext"])) {
$image = imagecreatefromjpeg($file["filepath"]);
} else {
if (is_png($file["ext"])) {
$image = imagecreatefrompng($file["filepath"]);
}
}
if (is_null($image)) {
return false;
}
$org = array("w" => imagesx($image), "h" => imagesy($image));
$new = null;
if ($org["w"] < $org["h"] || $org["w"] == $org["h"]) {
$w = MAXWIDTHTHUMB;
$rate = $w / $org["w"];
$new = array("w" => $w, "h" => intval($org["h"] * $rate));
} else {
$h = MAXHEIGHTTHUMB;
$rate = $h / $org["h"];
$new = array("w" => intval($org["w"] * $rate), "h" => $h);
}
$r = false;
if (USEIMAGEMAGICK) {
$cmd = "convert ";
if (is_jpg($file["ext"])) {
$cmd .= '-define jpeg:size=' . $new["w"] . 'x' . $new["h"];
}
$cmd .= ' -resize ' . $new["w"] . 'x' . $new["h"] . ' -quality ' . THUMBQUALITY . ' ' . $file["filepath"] . ' ' . $file["filepath"];
$r = system($cmd);
if ($r !== false) {
$r = true;
}
} else {
$new_image = imagecreatetruecolor($new["w"], $new["h"]);
$r = imagecopyresampled($new_image, $image, 0, 0, 0, 0, $new["w"], $new["h"], $org["w"], $org["h"]);
if ($r === false) {
imagedestroy($new_image);
return false;
}
$r = imagejpeg($new_image, $file["filepath"], THUMBQUALITY);
imagedestroy($new_image);
}
imagedestroy($image);
return $r;
}
function type_of_image($file)
{
if (is_jpg($file)) {
return 'jpg';
}
if (is_png($file)) {
return 'png';
}
if (is_gif($file)) {
return 'gif';
}
return false;
}
