I have below function to save JPEG as Progressive JPEG. It saved, but not as progressive JPEG. Is this correct ?
function save($filename, $image_type = IMAGETYPE_JPEG, $compression = 75, $permissions = null) {
if ($image_type == IMAGETYPE_JPEG) {
imageinterlace($this->image, true); //convert to progressive ?
imagejpeg($this->image, $filename, $compression);
} elseif ($image_type == IMAGETYPE_GIF) {
imagegif($this->image, $filename);
} elseif ($image_type == IMAGETYPE_PNG) {
imagepng($this->image, $filename);
}
if ($permissions != null) {
chmod($filename, $permissions);
}
}
This is how i called save() function :
function img_reconstruct($saveto) {
$image = new SimpleImage();
$image->load($saveto);
list($width, $height) = getimagesize($saveto);
if ($width > 800 && $width < 1200) {
$image->resize(800, $height);
$image->save($saveto);
}
}
try like below
imageinterlace($this->image, 1); //convert to progressive ?
may be issue with type casting
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.