我正在开发一个将图像上传到服务器的ios应用程序,相机胶卷的文件大小太大,所以我使用以下功能将缩略图保存到服务器。
如何在保存之前将图像旋转90度?
function thumbnail( $img, $source, $dest, $maxw, $maxh ) {
$jpg = $source.$img;
if( $jpg ) {
list( $width, $height ) = getimagesize( $jpg ); //$type will return the type of the image
$source = imagecreatefromjpeg( $jpg );
echo "WIDTH:".$width." HEIGHT:".$height;
if( $maxw >= $width && $maxh >= $height ) {
$ratio = 1;
}elseif( $width > $height ) {
$ratio = $maxw / $width;
}else {
$ratio = $maxh / $height;
}
$thumb_width = round( $width * $ratio ); //get the smaller value from cal # floor()
$thumb_height = round( $height * $ratio );
$thumb = imagecreatetruecolor( $thumb_width, $thumb_height );
imagecopyresampled( $thumb, $source, 0, 0, 0, 0, $thumb_width, $thumb_height, $width, $height );
$path = $dest.$img;
imagejpeg( $thumb, $path, 75 );
}
imagedestroy( $thumb );
imagedestroy( $source );
}
答案 0 :(得分:1)
使用imagerotate
功能:http://php.net/manual/en/function.imagerotate.php
您可以在imagejpeg之前添加以下行:
$thumb = imagerotate ( $thumb, 90 , 0 );