Code Modernization: Introduce `is_gd_image()` to check for PHP 8 `GdImage` object instances.
In PHP 8, the GD extension uses `GdImage` objects instead of resources for its underlying data structures. This updates the existing `is_resource()` calls for image resources in core to accomodate for `GdImage` instances as well. Props ayeshrajans, jrf. Fixes #50833. Built from https://develop.svn.wordpress.org/trunk@48798 git-svn-id: http://core.svn.wordpress.org/trunk@48560 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Sergey Biryukov
parent
a5edb2a8a1
commit
12c8f0e678
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@ -291,8 +291,8 @@ function wp_stream_image( $image, $mime_type, $attachment_id ) {
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* @since 2.9.0
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* @deprecated 3.5.0 Use {@see 'image_editor_save_pre'} instead.
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*
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* @param resource $image Image resource to be streamed.
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* @param int $attachment_id The attachment post ID.
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* @param resource|GdImage $image Image resource to be streamed.
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* @param int $attachment_id The attachment post ID.
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*/
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$image = apply_filters_deprecated( 'image_save_pre', array( $image, $attachment_id ), '3.5.0', 'image_editor_save_pre' );
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@ -420,19 +420,22 @@ function _image_get_preview_ratio( $w, $h ) {
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* @see WP_Image_Editor::rotate()
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*
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* @ignore
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* @param resource $img Image resource.
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* @param float|int $angle Image rotation angle, in degrees.
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* @return resource|false GD image resource, false otherwise.
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* @param resource|GdImage $img Image resource.
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* @param float|int $angle Image rotation angle, in degrees.
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* @return resource|GdImage|false GD image resource or GdImage instance, false otherwise.
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*/
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function _rotate_image_resource( $img, $angle ) {
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_deprecated_function( __FUNCTION__, '3.5.0', 'WP_Image_Editor::rotate()' );
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if ( function_exists( 'imagerotate' ) ) {
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$rotated = imagerotate( $img, $angle, 0 );
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if ( is_resource( $rotated ) ) {
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if ( is_gd_image( $rotated ) ) {
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imagedestroy( $img );
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$img = $rotated;
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}
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}
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return $img;
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}
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@ -444,17 +447,19 @@ function _rotate_image_resource( $img, $angle ) {
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* @see WP_Image_Editor::flip()
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*
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* @ignore
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* @param resource $img Image resource.
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* @param bool $horz Whether to flip horizontally.
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* @param bool $vert Whether to flip vertically.
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* @return resource (maybe) flipped image resource.
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* @param resource|GdImage $img Image resource or GdImage instance.
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* @param bool $horz Whether to flip horizontally.
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* @param bool $vert Whether to flip vertically.
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* @return resource|GdImage (maybe) flipped image resource or GdImage instance.
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*/
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function _flip_image_resource( $img, $horz, $vert ) {
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_deprecated_function( __FUNCTION__, '3.5.0', 'WP_Image_Editor::flip()' );
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$w = imagesx( $img );
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$h = imagesy( $img );
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$dst = wp_imagecreatetruecolor( $w, $h );
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if ( is_resource( $dst ) ) {
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if ( is_gd_image( $dst ) ) {
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$sx = $vert ? ( $w - 1 ) : 0;
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$sy = $horz ? ( $h - 1 ) : 0;
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$sw = $vert ? -$w : $w;
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@ -465,6 +470,7 @@ function _flip_image_resource( $img, $horz, $vert ) {
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$img = $dst;
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}
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}
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return $img;
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}
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@ -474,21 +480,23 @@ function _flip_image_resource( $img, $horz, $vert ) {
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* @since 2.9.0
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*
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* @ignore
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* @param resource $img Image resource.
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* @param float $x Source point x-coordinate.
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* @param float $y Source point y-coordinate.
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* @param float $w Source width.
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* @param float $h Source height.
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* @return resource (maybe) cropped image resource.
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* @param resource|GdImage $img Image resource or GdImage instance.
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* @param float $x Source point x-coordinate.
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* @param float $y Source point y-coordinate.
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* @param float $w Source width.
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* @param float $h Source height.
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* @return resource|GdImage (maybe) cropped image resource or GdImage instance.
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*/
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function _crop_image_resource( $img, $x, $y, $w, $h ) {
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$dst = wp_imagecreatetruecolor( $w, $h );
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if ( is_resource( $dst ) ) {
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if ( is_gd_image( $dst ) ) {
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if ( imagecopy( $dst, $img, 0, 0, $x, $y, $w, $h ) ) {
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imagedestroy( $img );
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$img = $dst;
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}
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}
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return $img;
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}
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@ -502,7 +510,7 @@ function _crop_image_resource( $img, $x, $y, $w, $h ) {
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* @return WP_Image_Editor WP_Image_Editor instance with changes applied.
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*/
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function image_edit_apply_changes( $image, $changes ) {
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if ( is_resource( $image ) ) {
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if ( is_gd_image( $image ) ) {
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/* translators: 1: $image, 2: WP_Image_Editor */
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_deprecated_argument( __FUNCTION__, '3.5.0', sprintf( __( '%1$s needs to be a %2$s object.' ), '$image', 'WP_Image_Editor' ) );
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}
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@ -566,7 +574,7 @@ function image_edit_apply_changes( $image, $changes ) {
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* @param array $changes Array of change operations.
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*/
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$image = apply_filters( 'wp_image_editor_before_change', $image, $changes );
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} elseif ( is_resource( $image ) ) {
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} elseif ( is_gd_image( $image ) ) {
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/**
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* Filters the GD image resource before applying changes to the image.
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@ -574,8 +582,8 @@ function image_edit_apply_changes( $image, $changes ) {
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* @since 2.9.0
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* @deprecated 3.5.0 Use {@see 'wp_image_editor_before_change'} instead.
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*
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* @param resource $image GD image resource.
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* @param array $changes Array of change operations.
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* @param resource|GdImage $image GD image resource or GdImage instance.
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* @param array $changes Array of change operations.
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*/
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$image = apply_filters_deprecated( 'image_edit_before_change', array( $image, $changes ), '3.5.0', 'wp_image_editor_before_change' );
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}
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@ -912,15 +912,39 @@ function file_is_displayable_image( $path ) {
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return apply_filters( 'file_is_displayable_image', $result, $path );
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}
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/**
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* Determines whether the value is an acceptable type for GD image functions.
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*
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* In PHP 8.0, the GD extension uses GdImage objects for its data structures.
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* This function checks if the passed value is either a resource of type `gd`
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* or a GdImage object instance. Any other type will return false.
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*
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* @since 5.6.0
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*
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* @param resource|GdImage|false $image A value to check for the type for.
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* @return bool True if $image is either a GD image resource or GdImage instance,
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* false otherwise.
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*/
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function is_gd_image( $image ) {
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if ( is_resource( $image ) && 'gd' === get_resource_type( $image )
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|| is_object( $image ) && $image instanceof GdImage
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) {
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return true;
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}
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return false;
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}
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/**
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* Load an image resource for editing.
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*
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* @since 2.9.0
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*
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* @param string $attachment_id Attachment ID.
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* @param string $mime_type Image mime type.
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* @param string $size Optional. Image size, defaults to 'full'.
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* @return resource|false The resulting image resource on success, false on failure.
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* @param string $mime_type Image mime type.
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* @param string $size Optional. Image size. Default 'full'.
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* @return resource|GdImage|false The resulting image resource or GdImage instance on success,
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* false on failure.
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*/
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function load_image_to_edit( $attachment_id, $mime_type, $size = 'full' ) {
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$filepath = _load_image_to_edit_path( $attachment_id, $size );
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@ -942,22 +966,25 @@ function load_image_to_edit( $attachment_id, $mime_type, $size = 'full' ) {
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$image = false;
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break;
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}
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if ( is_resource( $image ) ) {
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if ( is_gd_image( $image ) ) {
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/**
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* Filters the current image being loaded for editing.
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*
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* @since 2.9.0
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*
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* @param resource $image Current image.
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* @param string $attachment_id Attachment ID.
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* @param string $size Image size.
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* @param resource|GdImage $image Current image.
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* @param string $attachment_id Attachment ID.
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* @param string $size Image size.
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*/
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$image = apply_filters( 'load_image_to_edit', $image, $attachment_id, $size );
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if ( function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' ) ) {
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imagealphablending( $image, false );
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imagesavealpha( $image, true );
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}
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}
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return $image;
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}
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@ -971,7 +998,7 @@ function load_image_to_edit( $attachment_id, $mime_type, $size = 'full' ) {
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* @access private
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*
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* @param string $attachment_id Attachment ID.
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* @param string $size Optional. Image size, defaults to 'full'.
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* @param string $size Optional. Image size. Default 'full'.
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* @return string|false File path or url on success, false on failure.
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*/
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function _load_image_to_edit_path( $attachment_id, $size = 'full' ) {
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@ -17,7 +17,7 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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/**
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* GD Resource.
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*
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* @var resource
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* @var resource|GdImage
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*/
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protected $image;
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@ -95,7 +95,7 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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$this->image = @imagecreatefromstring( file_get_contents( $this->file ) );
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if ( ! is_resource( $this->image ) ) {
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if ( ! is_gd_image( $this->image ) ) {
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return new WP_Error( 'invalid_image', __( 'File is not an image.' ), $this->file );
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}
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@ -138,11 +138,11 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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/**
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* Resizes current image.
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* Wraps _resize, since _resize returns a GD Resource.
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*
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* At minimum, either a height or width must be provided.
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* If one of the two is set to null, the resize will
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* maintain aspect ratio according to the provided dimension.
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* Wraps `::_resize()` which returns a GD resource or GdImage instance.
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*
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* At minimum, either a height or width must be provided. If one of the two is set
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* to null, the resize will maintain aspect ratio according to the provided dimension.
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*
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* @since 3.5.0
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*
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@ -158,7 +158,7 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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$resized = $this->_resize( $max_w, $max_h, $crop );
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if ( is_resource( $resized ) ) {
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if ( is_gd_image( $resized ) ) {
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imagedestroy( $this->image );
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$this->image = $resized;
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return true;
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@ -174,7 +174,7 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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* @param int $max_w
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* @param int $max_h
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* @param bool|array $crop
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* @return resource|WP_Error
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* @return resource|GdImage|WP_Error
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*/
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protected function _resize( $max_w, $max_h, $crop = false ) {
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$dims = image_resize_dimensions( $this->size['width'], $this->size['height'], $max_w, $max_h, $crop );
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@ -188,7 +188,7 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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$resized = wp_imagecreatetruecolor( $dst_w, $dst_h );
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imagecopyresampled( $resized, $this->image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );
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if ( is_resource( $resized ) ) {
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if ( is_gd_image( $resized ) ) {
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$this->update_size( $dst_w, $dst_h );
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return $resized;
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}
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@ -329,7 +329,7 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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imagecopyresampled( $dst, $this->image, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );
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if ( is_resource( $dst ) ) {
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if ( is_gd_image( $dst ) ) {
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imagedestroy( $this->image );
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$this->image = $dst;
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$this->update_size();
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@ -353,7 +353,7 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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$transparency = imagecolorallocatealpha( $this->image, 255, 255, 255, 127 );
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$rotated = imagerotate( $this->image, $angle, $transparency );
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if ( is_resource( $rotated ) ) {
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if ( is_gd_image( $rotated ) ) {
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imagealphablending( $rotated, true );
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imagesavealpha( $rotated, true );
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imagedestroy( $this->image );
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@ -362,6 +362,7 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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return true;
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}
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}
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return new WP_Error( 'image_rotate_error', __( 'Image rotate failed.' ), $this->file );
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}
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@ -379,7 +380,7 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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$h = $this->size['height'];
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$dst = wp_imagecreatetruecolor( $w, $h );
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if ( is_resource( $dst ) ) {
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if ( is_gd_image( $dst ) ) {
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$sx = $vert ? ( $w - 1 ) : 0;
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$sy = $horz ? ( $h - 1 ) : 0;
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$sw = $vert ? -$w : $w;
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@ -391,6 +392,7 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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return true;
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}
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}
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return new WP_Error( 'image_flip_error', __( 'Image flip failed.' ), $this->file );
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}
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@ -415,9 +417,9 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
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}
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/**
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* @param resource $image
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* @param string|null $filename
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* @param string|null $mime_type
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* @param resource|GdImage $image
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* @param string|null $filename
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* @param string|null $mime_type
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* @return array|WP_Error
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*/
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protected function _save( $image, $filename = null, $mime_type = null ) {
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@ -548,6 +548,7 @@ class WP_Image_Editor_Imagick extends WP_Image_Editor {
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} catch ( Exception $e ) {
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return new WP_Error( 'image_crop_error', $e->getMessage() );
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}
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return $this->update_size();
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}
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@ -582,6 +583,7 @@ class WP_Image_Editor_Imagick extends WP_Image_Editor {
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} catch ( Exception $e ) {
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return new WP_Error( 'image_rotate_error', $e->getMessage() );
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}
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return true;
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}
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@ -3196,7 +3196,8 @@ function _get_post_ancestors( &$post ) {
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* @see wp_get_image_editor()
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*
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* @param string $file Filename of the image to load.
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* @return resource The resulting image resource on success, Error string on failure.
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* @return resource|GdImage|string The resulting image resource or GdImage instance on success,
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* error string on failure.
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*/
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function wp_load_image( $file ) {
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_deprecated_function( __FUNCTION__, '3.5.0', 'wp_get_image_editor()' );
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@ -3217,7 +3218,7 @@ function wp_load_image( $file ) {
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$image = imagecreatefromstring( file_get_contents( $file ) );
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if ( ! is_resource( $image ) ) {
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if ( ! is_gd_image( $image ) ) {
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/* translators: %s: File name. */
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return sprintf( __( 'File “%s” is not an image.' ), $file );
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}
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@ -3459,15 +3459,19 @@ function get_taxonomies_for_attachments( $output = 'names' ) {
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* @since 2.9.0
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*
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* @param int $width Image width in pixels.
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* @param int $height Image height in pixels..
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* @return resource The GD image resource.
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* @param int $height Image height in pixels.
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* @return resource|GdImage The GD image resource or GdImage instance.
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*/
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function wp_imagecreatetruecolor( $width, $height ) {
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$img = imagecreatetruecolor( $width, $height );
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if ( is_resource( $img ) && function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' ) ) {
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if ( is_gd_image( $img )
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&& function_exists( 'imagealphablending' ) && function_exists( 'imagesavealpha' )
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) {
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imagealphablending( $img, false );
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imagesavealpha( $img, true );
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}
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return $img;
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}
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@ -13,7 +13,7 @@
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*
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* @global string $wp_version
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*/
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$wp_version = '5.6-alpha-48797';
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$wp_version = '5.6-alpha-48798';
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/**
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* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
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