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Posted by Mattia Gentilini on 05/03/07 14:45
Milagro ha scritto:
> I'm using the code below to create thumbnails from photos. The code
> works fine and thumbnails are created. However, thumbnails of vertical
> photos are oriented as horizontal photos.
It seems you have to check the EXIF orientation. EXIF is a metadata
section for JPEG, which most cameras set when they take a photo.
You could access the EXIF data using the exif_read_data() function (see
the doc for info about input parameters) which will return you an array.
After that, you could deterine if the image has to be rotated in this
way ($exif is the array returned by exif_read_data() ):
$o = $exif["IFD0"]["Orientation"];
$rotate = 0;
$flip = false;
switch($o) {
case 1:
$rotate = 0;
$flip = false;
break;
case 2:
$rotate = 0;
$flip = true;
break;
case 3:
$rotate = 180;
$flip = false;
break;
case 4:
$rotate = 180;
$flip = true;
break;
case 5:
$rotate = 90;
$flip = true;
break;
case 6:
$rotate = 90;
$flip = false;
break;
case 7:
$rotate = 270;
$flip = true;
break;
case 8:
$rotate = 270;
$flip = false;
break;
}
Now, $rotate indicates how many degrees the image should be rotated
(clockwise). Then, if $flip is true , you should also flip horizontally
the image (normally this is not the case for digital camera photos)
--
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