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authorzotlabs <mike@macgirvin.com>2017-11-19 16:56:59 -0800
committerzotlabs <mike@macgirvin.com>2017-11-19 16:56:59 -0800
commit16f584608f8147a58bfe295ff3295aae0f85b38a (patch)
tree6ccfd91b8114428cea33b8d5b3293f3f806578db /include/photo/photo_driver.php
parent60fcb5f4f2729e6e164abcb515540cc752881b9b (diff)
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Diffstat (limited to 'include/photo/photo_driver.php')
-rw-r--r--include/photo/photo_driver.php109
1 files changed, 62 insertions, 47 deletions
diff --git a/include/photo/photo_driver.php b/include/photo/photo_driver.php
index 21431e96f..f75ff2386 100644
--- a/include/photo/photo_driver.php
+++ b/include/photo/photo_driver.php
@@ -241,69 +241,84 @@ abstract class photo_driver {
}
+ /**
+ * @brief reads exif data from filename
+ */
+ public function exif($filename) {
- public function orient($filename) {
- /**
- * This function is a bit unusual, because it is operating on a file, but you must
- * first create an image from that file to initialise the type and check validity
- * of the image.
- */
-
- if(! $this->is_valid())
+ if((! function_exists('exif_read_data'))
+ || (! in_array($this->getType(), [ 'image/jpeg' , 'image/tiff'] ))) {
return false;
+ }
- if((! function_exists('exif_read_data')) || ($this->getType() !== 'image/jpeg'))
- return false;
-
- $exif = @exif_read_data($filename,null,true);
-
- if($exif) {
- $ort = $exif['IFD0']['Orientation'];
-
- switch($ort)
- {
- case 1: // nothing
- break;
+ /*
+ * PHP 7.2 allows you to use a stream resource, which should reduce/avoid
+ * memory exhaustion on large images.
+ */
- case 2: // horizontal flip
- $this->flip();
- break;
+ if(version_compare(PHP_VERSION,'7.2.0') >= 0) {
+ $f = @fopen($filename,'rb');
+ }
+ else {
+ $f = $filename;
+ }
- case 3: // 180 rotate left
- $this->rotate(180);
- break;
+ if($f) {
+ return @exif_read_data($f);
+ }
- case 4: // vertical flip
- $this->flip(false, true);
- break;
+ return false;
+ }
- case 5: // vertical flip + 90 rotate right
- $this->flip(false, true);
- $this->rotate(-90);
- break;
+ /**
+ * @brief orients current image based on exif orientation information
+ */
- case 6: // 90 rotate right
- $this->rotate(-90);
- break;
+ public function orient($exif) {
- case 7: // horizontal flip + 90 rotate right
- $this->flip();
- $this->rotate(-90);
- break;
+ if(! ($this->is_valid() && $exif)) {
+ return false;
+ }
- case 8: // 90 rotate left
- $this->rotate(90);
- break;
- }
+ $ort = $exif['IFD0']['Orientation'];
- return $exif;
+ if(! $ort) {
+ return false;
+ }
+ switch($ort) {
+ case 1: // nothing
+ break;
+ case 2: // horizontal flip
+ $this->flip();
+ break;
+ case 3: // 180 rotate left
+ $this->rotate(180);
+ break;
+ case 4: // vertical flip
+ $this->flip(false, true);
+ break;
+ case 5: // vertical flip + 90 rotate right
+ $this->flip(false, true);
+ $this->rotate(-90);
+ break;
+ case 6: // 90 rotate right
+ $this->rotate(-90);
+ break;
+ case 7: // horizontal flip + 90 rotate right
+ $this->flip();
+ $this->rotate(-90);
+ break;
+ case 8: // 90 rotate left
+ $this->rotate(90);
+ break;
+ default:
+ break;
}
-
- return false;
+ return true;
}