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There is a bug in this routine: fix_orientation
The call to imageflip returns a boolean, not a flipped image. The fixed routine is like this:
function fix_orientation ($orientation, $fileandpath, $ext, $quality=80) {
// Gets the GD image resource for loaded image
$img_res = get_image_resource ($fileandpath, $ext);
// If it failed to load a resource, give up
if (is_null ($img_res)) {
return false;
}
// auto rotate
switch ($orientation) {
// Correct orientation, but flipped on the horizontal axis (might do it at some point in the future)
case 2:
$ret = imageflip ($img_res, IMG_FLIP_HORIZONTAL);
break;
// Upside-Down
case 3:
$ret = imageflip ($img_res, IMG_FLIP_VERTICAL);
break;
// Upside-Down & Flipped along horizontal axis
case 4:
$ret = imageflip ($img_res, IMG_FLIP_BOTH);
break;
// Turned 90 deg to the left and flipped
case 5:
$ret = imagerotate($img_res, -90, 0);
$ret = imageflip ($img_res, IMG_FLIP_HORIZONTAL);
break;
// Turned 90 deg to the left
case 6:
$ret = imagerotate ($img_res, -90, 0);
break;
// Turned 90 deg to the right and flipped
case 7:
$ret = imagerotate ($img_res, 90, 0);
$ret = imageflip ($img_res,IMG_FLIP_HORIZONTAL);
break;
// Turned 90 deg to the right
case 8:
$ret = imagerotate ($img_res, 90, 0);
break;
}
// If theres no final image resource to output for whatever reason, give up
if (!isset ($ret)) {
return false;
}
// save image
save_image_resource ($img_res, $fileandpath, $ext, $quality);
// Free up memory
imagedestroy ($img_res);
}
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