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Media/Upload: rotate images on upload according to EXIF Orientation.

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Props msaggiorato, wpdavis, markoheijnen, dhuyvetter, msaggiorato, n7studios, triplejumper12, pbiron, mikeschroder, joemcgill, azaozz.

Fixes #14459.

git-svn-id: https://develop.svn.wordpress.org/trunk@46202 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Andrew Ozz
2019-09-20 18:20:26 +00:00
parent 188fe7eb2f
commit 89939327e3
3 changed files with 186 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

78
src/wp-includes/class-wp-image-editor.php
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@@ -384,6 +384,84 @@ abstract class WP_Image_Editor {
return "{$this->size['width']}x{$this->size['height']}";
}
/**
* Check if a JPEG image has EXIF Orientation tag and rotate it if needed.
*
* @since 5.3.0
*
* @return bool|WP_Error True if the image was rotated. False if not rotated (no EXIF data or the image doesn't need to be rotated).
* WP_Error if error while rotating.
*/
public function maybe_exif_rotate() {
$orientation = null;
if ( is_callable( 'exif_read_data' ) && 'image/jpeg' === $this->mime_type ) {
$exif_data = @exif_read_data( $this->file );
if ( ! empty( $exif_data['Orientation'] ) ) {
$orientation = (int) $exif_data['Orientation'];
}
}
/**
* Filters the `$orientation` value to correct it before rotating or to prevemnt rotating the image.
*
* @since 5.3.0
*
* @param int $orientation EXIF Orientation value as retrieved from the image file.
* @param string $file Path to the image file.
*/
$orientation = apply_filters( 'wp_image_maybe_exif_rotate', $orientation, $this->file );
if ( ! $orientation || $orientation === 1 ) {
return false;
}
switch ( $orientation ) {
case 2:
// Flip horizontally.
$result = $this->flip( true, false );
break;
case 3:
// Rotate 180 degrees or flip horizontally and vertically.
// Flipping seems faster/uses less resources.
$result = $this->flip( true, true );
break;
case 4:
// Flip vertically.
$result = $this->flip( false, true );
break;
case 5:
// Rotate 90 degrees counter-clockwise and flip vertically.
$result = $this->rotate( 90 );
if ( ! is_wp_error( $result ) ) {
$result = $this->flip( false, true );
}
break;
case 6:
// Rotate 90 degrees clockwise (270 counter-clockwise).
$result = $this->rotate( 270 );
break;
case 7:
// Rotate 90 degrees counter-clockwise and flip horizontally.
$result = $this->rotate( 90 );
if ( ! is_wp_error( $result ) ) {
$result = $this->flip( true, false );
}
break;
case 8:
// Rotate 90 degrees counter-clockwise.
$result = $this->rotate( 90 );
break;
}
return $result;
}
/**
* Either calls editor's save function or handles file as a stream.
*