<?php
/**
* WordPress Imagick Image Editor
*
* @package WordPress
* @subpackage Image_Editor
*/
/**
* WordPress Image Editor Class for Image Manipulation through Imagick PHP Module
*
* @since 3.5.0
*
* @see WP_Image_Editor
*/
class WP_Image_Editor_Imagick extends WP_Image_Editor {
/**
* Imagick object.
*
* @var Imagick
*/
protected $image;
public function __destruct() {
if ( $this->image instanceof Imagick ) {
// We don't need the original in memory anymore.
$this->image->clear();
$this->image->destroy();
}
}
/**
* Checks to see if current environment supports Imagick.
*
* We require Imagick 2.2.0 or greater, based on whether the queryFormats()
* method can be called statically.
*
* @since 3.5.0
*
* @param array $args
* @return bool
*/
public static function test( $args = array() ) {
// First, test Imagick's extension and classes.
if ( ! extension_loaded( 'imagick' ) || ! class_exists( 'Imagick', false ) || ! class_exists( 'ImagickPixel', false ) ) {
return false;
}
if ( version_compare( phpversion( 'imagick' ), '2.2.0', '<' ) ) {
return false;
}
$required_methods = array(
'clear',
'destroy',
'valid',
'getimage',
'writeimage',
'getimageblob',
'getimagegeometry',
'getimageformat',
'setimageformat',
'setimagecompression',
'setimagecompressionquality',
'setimagepage',
'setoption',
'scaleimage',
'cropimage',
'rotateimage',
'flipimage',
'flopimage',
'readimage',
'readimageblob',
);
// Now, test for deep requirements within Imagick.
if ( ! defined( 'imagick::COMPRESSION_JPEG' ) ) {
return false;
}
$class_methods = array_map( 'strtolower', get_class_methods( 'Imagick' ) );
if ( array_diff( $required_methods, $class_methods ) ) {
return false;
}
return true;
}
/**
* Checks to see if editor supports the mime-type specified.
*
* @since 3.5.0
*
* @param string $mime_type
* @return bool
*/
public static function supports_mime_type( $mime_type ) {
$imagick_extension = strtoupper( self::get_extension( $mime_type ) );
if ( ! $imagick_extension ) {
return false;
}
/*
* setIteratorIndex is optional unless mime is an animated format.
* Here, we just say no if you are missing it and aren't loading a jpeg.
*/
if ( ! method_exists( 'Imagick', 'setIteratorIndex' ) && 'image/jpeg' !== $mime_type ) {
return false;
}
try {
// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
return ( (bool) @Imagick::queryFormats( $imagick_extension ) );
} catch ( Exception $e ) {
return false;
}
}
/**
* Loads image from $this->file into new Imagick Object.
*
* @since 3.5.0
*
* @return true|WP_Error True if loaded; WP_Error on failure.
*/
public function load() {
if ( $this->image instanceof Imagick ) {
return true;
}
if ( ! is_file( $this->file ) && ! wp_is_stream( $this->file ) ) {
return new WP_Error( 'error_loading_image', __( 'File does not exist?' ), $this->file );
}
/*
* Even though Imagick uses less PHP memory than GD, set higher limit
* for users that have low PHP.ini limits.
*/
wp_raise_memory_limit( 'image' );
try {
$this->image = new Imagick();
$file_extension = strtolower( pathinfo( $this->file, PATHINFO_EXTENSION ) );
if ( 'pdf' === $file_extension ) {
$pdf_loaded = $this->pdf_load_source();
if ( is_wp_error( $pdf_loaded ) ) {
return $pdf_loaded;
}
} else {
if ( wp_is_stream( $this->file ) ) {
// Due to reports of issues with streams with `Imagick::readImageFile()`, uses `Imagick::readImageBlob()` instead.
$this->image->readImageBlob( file_get_contents( $this->file ), $this->file );
} else {
$this->image->readImage( $this->file );
}
}
if ( ! $this->image->valid() ) {
return new WP_Error( 'invalid_image', __( 'File is not an image.' ), $this->file );
}
// Select the first frame to handle animated images properly.
if ( is_callable( array( $this->image, 'setIteratorIndex' ) ) ) {
$this->image->setIteratorIndex( 0 );
}
if ( 'pdf' === $file_extension ) {
$this->remove_pdf_alpha_channel();
}
$this->mime_type = $this->get_mime_type( $this->image->getImageFormat() );
} catch ( Exception $e ) {
return new WP_Error( 'invalid_image', $e->getMessage(), $this->file );
}
$updated_size = $this->update_size();
if ( is_wp_error( $updated_size ) ) {
return $updated_size;
}
return $this->set_quality();
}
/**
* Sets Image Compression quality on a 1-100% scale.
*
* @since 3.5.0
* @since 6.8.0 The `$dims` parameter was added.
*
* @param int $quality Compression Quality. Range: [1,100]
* @param array $dims Optional. Image dimensions array with 'width' and 'height' keys.
* @return true|WP_Error True if set successfully; WP_Error on failure.
*/
public function set_quality( $quality = null, $dims = array() ) {
$quality_result = parent::set_quality( $quality, $dims );
if ( is_wp_error( $quality_result ) ) {
return $quality_result;
} else {
$quality = $this->get_quality();
}
try {
switch ( $this->mime_type ) {
case 'image/jpeg':
$this->image->setImageCompressionQuality( $quality );
$this->image->setCompressionQuality( $quality );
$this->image->setImageCompression( imagick::COMPRESSION_JPEG );
break;
case 'image/webp':
$webp_info = wp_get_webp_info( $this->file );
if ( 'lossless' === $webp_info['type'] ) {
// Use WebP lossless settings.
$this->image->setImageCompressionQuality( 100 );
$this->image->setCompressionQuality( 100 );
$this->image->setOption( 'webp:lossless', 'true' );
parent::set_quality( 100 );
} else {
$this->image->setImageCompressionQuality( $quality );
$this->image->setCompressionQuality( $quality );
}
break;
case 'image/avif':
// Set the AVIF encoder to work faster, with minimal impact on image size.
$this->image->setOption( 'heic:speed', 7 );
$this->image->setImageCompressionQuality( $quality );
$this->image->setCompressionQuality( $quality );
break;
default:
$this->image->setImageCompressionQuality( $quality );
$this->image->setCompressionQuality( $quality );
}
} catch ( Exception $e ) {
return new WP_Error( 'image_quality_error', $e->getMessage() );
}
return true;
}
/**
* Sets or updates current image size.
*
* @since 3.5.0
*
* @param int $width
* @param int $height
* @return true|WP_Error
*/
protected function update_size( $width = null, $height = null ) {
$size = null;
if ( ! $width || ! $height ) {
try {
$size = $this->image->getImageGeometry();
} catch ( Exception $e ) {
return new WP_Error( 'invalid_image', __( 'Could not read image size.' ), $this->file );
}
}
if ( ! $width ) {
$width = $size['width'];
}
if ( ! $height ) {
$height = $size['height'];
}
/*
* If we still don't have the image size, fall back to `wp_getimagesize`. This ensures AVIF and HEIC images
* are properly sized without affecting previous `getImageGeometry` behavior.
*/
if ( ( ! $width || ! $height ) && ( 'image/avif' === $this->mime_type || wp_is_heic_image_mime_type( $this->mime_type ) ) ) {
$size = wp_getimagesize( $this->file );
$width = $size[0];
$height = $size[1];
}
return parent::update_size( $width, $height );
}
/**
* Sets Imagick time limit.
*
* Depending on configuration, Imagick processing may take time.
*
* Multiple problems exist if PHP times out before ImageMagick completed:
* 1. Temporary files aren't cleaned by ImageMagick garbage collection.
* 2. No clear error is provided.
* 3. The cause of such timeout can be hard to pinpoint.
*
* This function, which is expected to be run before heavy image routines, resolves
* point 1 above by aligning Imagick's timeout with PHP's timeout, assuming it is set.
*
* However seems it introduces more problems than it fixes,
* see https://core.trac.wordpress.org/ticket/58202.
*
* Note:
* - Imagick resource exhaustion does not issue catchable exceptions (yet).
* See https://github.com/Imagick/imagick/issues/333.
* - The resource limit is not saved/restored. It applies to subsequent
* image operations within the time of the HTTP request.
*
* @since 6.2.0
* @since 6.3.0 This method was deprecated.
*
* @return int|null The new limit on success, null on failure.
*/
public static function set_imagick_time_limit() {
_deprecated_function( __METHOD__, '6.3.0' );
if ( ! defined( 'Imagick::RESOURCETYPE_TIME' ) ) {
return null;
}
// Returns PHP_FLOAT_MAX if unset.
$imagick_timeout = Imagick::getResourceLimit( Imagick::RESOURCETYPE_TIME );
// Convert to an integer, keeping in mind that: 0 === (int) PHP_FLOAT_MAX.
$imagick_timeout = $imagick_timeout > PHP_INT_MAX ? PHP_INT_MAX : (int) $imagick_timeout;
$php_timeout = (int) ini_get( 'max_execution_time' );
if ( $php_timeout > 1 && $php_timeout < $imagick_timeout ) {
$limit = (float) 0.8 * $php_timeout;
Imagick::setResourceLimit( Imagick::RESOURCETYPE_TIME, $limit );
return $limit;
}
}
/**
* Resizes current image.
*
* At minimum, either a height or width must be provided.
* If one of the two is set to null, the resize will
* maintain aspect ratio according to the provided dimension.
*
* @since 3.5.0
*
* @param int|null $max_w Image width.
* @param int|null $max_h Image height.
* @param bool|array $crop {
* Optional. Image cropping behavior. If false, the image will be scaled (default).
* If true, image will be cropped to the specified dimensions using center positions.
* If an array, the image will be cropped using the array to specify the crop location:
*
* @type string $0 The x crop position. Accepts 'left', 'center', or 'right'.
* @type string $1 The y crop position. Accepts 'top', 'center', or 'bottom'.
* }
* @return true|WP_Error
*/
public function resize( $max_w, $max_h, $crop = false ) {
if ( ( $this->size['width'] === $max_w ) && ( $this->size['height'] === $max_h ) ) {
return true;
}
$dims = image_resize_dimensions( $this->size['width'], $this->size['height'], $max_w, $max_h, $crop );
if ( ! $dims ) {
return new WP_Error( 'error_getting_dimensions', __( 'Could not calculate resized image dimensions' ) );
}
list( $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ) = $dims;
if ( $crop ) {
return $this->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h );
}
$this->set_quality(
null,
array(
'width' => $dst_w,
'height' => $dst_h,
)
);
// Execute the resize.
$thumb_result = $this->thumbnail_image( $dst_w, $dst_h );
if ( is_wp_error( $thumb_result ) ) {
return $thumb_result;
}
return $this->update_size( $dst_w, $dst_h );
}
/**
* Efficiently resize the current image
*
* This is a WordPress specific implementation of Imagick::thumbnailImage(),
* which resizes an image to given dimensions and removes any associated profiles.
*
* @since 4.5.0
*
* @param int $dst_w The destination width.
* @param int $dst_h The destination height.
* @param string $filter_name Optional. The Imagick filter to use when resizing. Default 'FILTER_TRIANGLE'.
* @param bool $strip_meta Optional. Strip all profiles, excluding color profiles, from the image. Default true.
* @return void|WP_Error
*/
protected function thumbnail_image( $dst_w, $dst_h, $filter_name = 'FILTER_TRIANGLE', $strip_meta = true ) {
$allowed_filters = array(
'FILTER_POINT',
'FILTER_BOX',
'FILTER_TRIANGLE',
'FILTER_HERMITE',
'FILTER_HANNING',
'FILTER_HAMMING',
'FILTER_BLACKMAN',
'FILTER_GAUSSIAN',
'FILTER_QUADRATIC',
'FILTER_CUBIC',
'FILTER_CATROM',
'FILTER_MITCHELL',
'FILTER_LANCZOS',
'FILTER_BESSEL',
'FILTER_SINC',
);
/**
* Set the filter value if '$filter_name' name is in the allowed list and the related
* Imagick constant is defined or fall back to the default filter.
*/
if ( in_array( $filter_name, $allowed_filters, true ) && defined( 'Imagick::' . $filter_name ) ) {
$filter = constant( 'Imagick::' . $filter_name );
} else {
$filter = defined( 'Imagick::FILTER_TRIANGLE' ) ? Imagick::FILTER_TRIANGLE : false;
}
/**
* Filters whether to strip metadata from images when they're resized.
*
* This filter only applies when resizing using the Imagick editor since GD
* always strips profiles by default.
*
* @since 4.5.0
*
* @param bool $strip_meta Whether to strip image metadata during resizing. Default true.
*/
if ( apply_filters( 'image_strip_meta', $strip_meta ) ) {
$this->strip_meta(); // Fail silently if not supported.
}
try {
/*
* To be more efficient, resample large images to 5x the destination size before resizing
* whenever the output size is less that 1/3 of the original image size (1/3^2 ~= .111),
* unless we would be resampling to a scale smaller than 128x128.
*/
if ( is_callable( array( $this->image, 'sampleImage' ) ) ) {
$resize_ratio = ( $dst_w / $this->size['width'] ) * ( $dst_h / $this->size['height'] );
$sample_factor = 5;
if ( $resize_ratio < .111 && ( $dst_w * $sample_factor > 128 && $dst_h * $sample_factor > 128 ) ) {
$this->image->sampleImage( $dst_w * $sample_factor, $dst_h * $sample_factor );
}
}
/*
* Use resizeImage() when it's available and a valid filter value is set.
* Otherwise, fall back to the scaleImage() method for resizing, which
* results in better image quality over resizeImage() with default filter
* settings and retains backward compatibility with pre 4.5 functionality.
*/
if ( is_callable( array( $this->image, 'resizeImage' ) ) && $filter ) {
$this->image->setOption( 'filter:support', '2.0' );
$this->image->resizeImage( $dst_w, $dst_h, $filter, 1 );
} else {
$this->image->scaleImage( $dst_w, $dst_h );
}
// Set appropriate quality settings after resizing.
if ( 'image/jpeg' === $this->mime_type ) {
if ( is_callable( array( $this->image, 'unsharpMaskImage' ) ) ) {
$this->image->unsharpMaskImage( 0.25, 0.25, 8, 0.065 );
}
$this->image->setOption( 'jpeg:fancy-upsampling', 'off' );
}
if ( 'image/png' === $this->mime_type ) {
$this->image->setOption( 'png:compression-filter', '5' );
$this->image->setOption( 'png:compression-level', '9' );
$this->image->setOption( 'png:compression-strategy', '1' );
// Check to see if a PNG is indexed, and find the pixel depth.
if ( is_callable( array( $this->image, 'getImageDepth' ) ) ) {
$indexed_pixel_depth = $this->image->getImageDepth();
// Indexed PNG files get some additional handling.
if ( 0 < $indexed_pixel_depth && 8 >= $indexed_pixel_depth ) {
// Check for an alpha channel.
if (
is_callable( array( $this->image, 'getImageAlphaChannel' ) )
&& $this->image->getImageAlphaChannel()
) {
$this->image->setOption( 'png:include-chunk', 'tRNS' );
} else {
$this->image->setOption( 'png:exclude-chunk', 'all' );
}
// Reduce colors in the images to maximum needed, using the global colorspace.
$max_colors = pow( 2, $indexed_pixel_depth );
if ( is_callable( array( $this->image, 'getImageColors' ) ) ) {
$current_colors = $this->image->getImageColors();
$max_colors = min( $max_colors, $current_colors );
}
$this->image->quantizeImage( $max_colors, $this->image->getColorspace(), 0, false, false );
/**
* If the colorspace is 'gray', use the png8 format to ensure it stays indexed.
*/
if ( Imagick::COLORSPACE_GRAY === $this->image->getImageColorspace() ) {
$this->image->setOption( 'png:format', 'png8' );
}
}
}
}
/*
* If alpha channel is not defined, set it opaque.
*
* Note that Imagick::getImageAlphaChannel() is only available if Imagick
* has been compiled against ImageMagick version 6.4.0 or newer.
*/
if ( is_callable( array( $this->image, 'getImageAlphaChannel' ) )
&& is_callable( array( $this->image, 'setImageAlphaChannel' ) )
&& defined( 'Imagick::ALPHACHANNEL_UNDEFINED' )
&& defined( 'Imagick::ALPHACHANNEL_OPAQUE' )
) {
if ( $this->image->getImageAlphaChannel() === Imagick::ALPHACHANNEL_UNDEFINED ) {
$this->image->setImageAlphaChannel( Imagick::ALPHACHANNEL_OPAQUE );
}
}
// Limit the bit depth of resized images.
if ( is_callable( array( $this->image, 'getImageDepth' ) ) && is_callable( array( $this->image, 'setImageDepth' ) ) ) {
/**
* Filters the maximum bit depth of resized images.
*
* This filter only applies when resizing using the Imagick editor since GD
* does not support getting or setting bit depth.
*
* Use this to adjust the maximum bit depth of resized images.
*
* @since 6.8.0
*
* @param int $max_depth The maximum bit depth. Default is the input depth.
* @param int $image_depth The bit depth of the original image.
*/
$max_depth = apply_filters( 'image_max_bit_depth', $this->image->getImageDepth(), $this->image->getImageDepth() );
$this->image->setImageDepth( $max_depth );
}
} catch ( Exception $e ) {
return new WP_Error( 'image_resize_error', $e->getMessage() );
}
}
/**
* Create multiple smaller images from a single source.
*
* Attempts to create all sub-sizes and returns the meta data at the end. This
* may result in the server running out of resources. When it fails there may be few
* "orphaned" images left over as the meta data is never returned and saved.
*
* As of 5.3.0 the preferred way to do this is with `make_subsize()`. It creates
* the new images one at a time and allows for the meta data to be saved after
* each new image is created.
*
* @since 3.5.0
*
* @param array $sizes {
* An array of image size data arrays.
*
* Either a height or width must be provided.
* If one of the two is set to null, the resize will
* maintain aspect ratio according to the provided dimension.
*
* @type array ...$0 {
* Array of height, width values, and whether to crop.
*
* @type int $width Image width. Optional if `$height` is specified.
* @type int $height Image height. Optional if `$width` is specified.
* @type bool|array $crop Optional. Whether to crop the image. Default false.
* }
* }
* @return array An array of resized images' metadata by size.
*/
public function multi_resize( $sizes ) {
$metadata = array();
foreach ( $sizes as $size => $size_data ) {
$meta = $this->make_subsize( $size_data );
if ( ! is_wp_error( $meta ) ) {
$metadata[ $size ] = $meta;
}
}
return $metadata;
}
/**
* Create an image sub-size and return the image meta data value for it.
*
* @since 5.3.0
*
* @param array $size_data {
* Array of size data.
*
* @type int $width The maximum width in pixels.
* @type int $height The maximum height in pixels.
* @type bool|array $crop Whether to crop the image to exact dimensions.
* }
* @return array|WP_Error The image data array for inclusion in the `sizes` array in the image meta,
* WP_Error object on error.
*/
public function make_subsize( $size_data ) {
if ( ! isset( $size_data['width'] ) && ! isset( $size_data['height'] ) ) {
return new WP_Error( 'image_subsize_create_error', __( 'Cannot resize the image. Both width and height are not set.' ) );
}
$orig_size = $this->size;
$orig_image = $this->image->getImage();
if ( ! isset( $size_data['width'] ) ) {
$size_data['width'] = null;
}
if ( ! isset( $size_data['height'] ) ) {
$size_data['height'] = null;
}
if ( ! isset( $size_data['crop'] ) ) {
$size_data['crop'] = false;
}
if ( ( $this->size['width'] === $size_data['width'] ) && ( $this->size['height'] === $size_data['height'] ) ) {
return new WP_Error( 'image_subsize_create_error', __( 'The image already has the requested size.' ) );
}
$resized = $this->resize( $size_data['width'], $size_data['height'], $size_data['crop'] );
if ( is_wp_error( $resized ) ) {
$saved = $resized;
} else {
$saved = $this->_save( $this->image );
$this->image->clear();
$this->image->destroy();
$this->image = null;
}
$this->size = $orig_size;
$this->image = $orig_image;
if ( ! is_wp_error( $saved ) ) {
unset( $saved['path'] );
}
return $saved;
}
/**
* Crops Image.
*
* @since 3.5.0
*
* @param int $src_x The start x position to crop from.
* @param int $src_y The start y position to crop from.
* @param int $src_w The width to crop.
* @param int $src_h The height to crop.
* @param int $dst_w Optional. The destination width.
* @param int $dst_h Optional. The destination height.
* @param bool $src_abs Optional. If the source crop points are absolute.
* @return true|WP_Error
*/
public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) {
if ( $src_abs ) {
$src_w -= $src_x;
$src_h -= $src_y;
}
try {
$this->image->cropImage( $src_w, $src_h, $src_x, $src_y );
$this->image->setImagePage( $src_w, $src_h, 0, 0 );
if ( $dst_w || $dst_h ) {
/*
* If destination width/height isn't specified,
* use same as width/height from source.
*/
if ( ! $dst_w ) {
$dst_w = $src_w;
}
if ( ! $dst_h ) {
$dst_h = $src_h;
}
$thumb_result = $this->thumbnail_image( $dst_w, $dst_h );
if ( is_wp_error( $thumb_result ) ) {
return $thumb_result;
}
return $this->update_size();
}
} catch ( Exception $e ) {
return new WP_Error( 'image_crop_error', $e->getMessage() );
}
return $this->update_size();
}
/**
* Rotates current image counter-clockwise by $angle.
*
* @since 3.5.0
*
* @param float $angle
* @return true|WP_Error
*/
public function rotate( $angle ) {
/**
* $angle is 360-$angle because Imagick rotates clockwise
* (GD rotates counter-clockwise)
*/
try {
$this->image->rotateImage( new ImagickPixel( 'none' ), 360 - $angle );
// Normalize EXIF orientation data so that display is consistent across devices.
if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) {
$this->image->setImageOrientation( Imagick::ORIENTATION_TOPLEFT );
}
// Since this changes the dimensions of the image, update the size.
$result = $this->update_size();
if ( is_wp_error( $result ) ) {
return $result;
}
$this->image->setImagePage( $this->size['width'], $this->size['height'], 0, 0 );
} catch ( Exception $e ) {
return new WP_Error( 'image_rotate_error', $e->getMessage() );
}
return true;
}
/**
* Flips current image.
*
* @since 3.5.0
*
* @param bool $horz Flip along Horizontal Axis
* @param bool $vert Flip along Vertical Axis
* @return true|WP_Error
*/
public function flip( $horz, $vert ) {
try {
if ( $horz ) {
$this->image->flipImage();
}
if ( $vert ) {
$this->image->flopImage();
}
// Normalize EXIF orientation data so that display is consistent across devices.
if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) {
$this->image->setImageOrientation( Imagick::ORIENTATION_TOPLEFT );
}
} catch ( Exception $e ) {
return new WP_Error( 'image_flip_error', $e->getMessage() );
}
return true;
}
/**
* Check if a JPEG image has EXIF Orientation tag and rotate it if needed.
*
* As ImageMagick copies the EXIF data to the flipped/rotated image, proceed only
* if EXIF Orientation can be reset afterwards.
*
* @since 5.3.0
*
* @return bool|WP_Error True if the image was rotated. False if no EXIF data or if the image doesn't need rotation.
* WP_Error if error while rotating.
*/
public function maybe_exif_rotate() {
if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) {
return parent::maybe_exif_rotate();
} else {
return new WP_Error( 'write_exif_error', __( 'The image cannot be rotated because the embedded meta data cannot be updated.' ) );
}
}
/**
* Saves current image to file.
*
* @since 3.5.0
* @since 6.0.0 The `$filesize` value was added to the returned array.
*
* @param string $destfilename Optional. Destination filename. Default null.
* @param string $mime_type Optional. The mime-type. Default null.
* @return array|WP_Error {
* Array on success or WP_Error if the file failed to save.
*
* @type string $path Path to the image file.
* @type string $file Name of the image file.
* @type int $width Image width.
* @type int $height Image height.
* @type string $mime-type The mime type of the image.
* @type int $filesize File size of the image.
* }
*/
public function save( $destfilename = null, $mime_type = null ) {
$saved = $this->_save( $this->image, $destfilename, $mime_type );
if ( ! is_wp_error( $saved ) ) {
$this->file = $saved['path'];
$this->mime_type = $saved['mime-type'];
try {
$this->image->setImageFormat( strtoupper( $this->get_extension( $this->mime_type ) ) );
} catch ( Exception $e ) {
return new WP_Error( 'image_save_error', $e->getMessage(), $this->file );
}
}
return $saved;
}
/**
* Removes PDF alpha after it's been read.
*
* @since 6.4.0
*/
protected function remove_pdf_alpha_channel() {
$version = Imagick::getVersion();
// Remove alpha channel if possible to avoid black backgrounds for Ghostscript >= 9.14. RemoveAlphaChannel added in ImageMagick 6.7.5.
if ( $version['versionNumber'] >= 0x675 ) {
try {
// Imagick::ALPHACHANNEL_REMOVE mapped to RemoveAlphaChannel in PHP imagick 3.2.0b2.
$this->image->setImageAlphaChannel( defined( 'Imagick::ALPHACHANNEL_REMOVE' ) ? Imagick::ALPHACHANNEL_REMOVE : 12 );
} catch ( Exception $e ) {
return new WP_Error( 'pdf_alpha_process_failed', $e->getMessage() );
}
}
}
/**
* @since 3.5.0
* @since 6.0.0 The `$filesize` value was added to the returned array.
*
* @param Imagick $image
* @param string $filename
* @param string $mime_type
* @return array|WP_Error {
* Array on success or WP_Error if the file failed to save.
*
* @type string $path Path to the image file.
* @type string $file Name of the image file.
* @type int $width Image width.
* @type int $height Image height.
* @type string $mime-type The mime type of the image.
* @type int $filesize File size of the image.
* }
*/
protected function _save( $image, $filename = null, $mime_type = null ) {
list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type );
if ( ! $filename ) {
$filename = $this->generate_filename( null, null, $extension );
}
try {
// Store initial format.
$orig_format = $this->image->getImageFormat();
$this->image->setImageFormat( strtoupper( $this->get_extension( $mime_type ) ) );
} catch ( Exception $e ) {
return new WP_Error( 'image_save_error', $e->getMessage(), $filename );
}
if ( method_exists( $this->image, 'setInterlaceScheme' )
&& method_exists( $this->image, 'getInterlaceScheme' )
&& defined( 'Imagick::INTERLACE_PLANE' )
) {
$orig_interlace = $this->image->getInterlaceScheme();
/** This filter is documented in wp-includes/class-wp-image-editor-gd.php */
if ( apply_filters( 'image_save_progressive', false, $mime_type ) ) {
$this->image->setInterlaceScheme( Imagick::INTERLACE_PLANE ); // True - line interlace output.
} else {
$this->image->setInterlaceScheme( Imagick::INTERLACE_NO ); // False - no interlace output.
}
}
$write_image_result = $this->write_image( $this->image, $filename );
if ( is_wp_error( $write_image_result ) ) {
return $write_image_result;
}
try {
// Reset original format.
$this->image->setImageFormat( $orig_format );
if ( isset( $orig_interlace ) ) {
$this->image->setInterlaceScheme( $orig_interlace );
}
} catch ( Exception $e ) {
return new WP_Error( 'image_save_error', $e->getMessage(), $filename );
}
// Set correct file permissions.
$stat = stat( dirname( $filename ) );
$perms = $stat['mode'] & 0000666; // Same permissions as parent folder, strip off the executable bits.
chmod( $filename, $perms );
return array(
'path' => $filename,
/** This filter is documented in wp-includes/class-wp-image-editor-gd.php */
'file' => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ),
'width' => $this->size['width'],
'height' => $this->size['height'],
'mime-type' => $mime_type,
'filesize' => wp_filesize( $filename ),
);
}
/**
* Writes an image to a file or stream.
*
* @since 5.6.0
*
* @param Imagick $image
* @param string $filename The destination filename or stream URL.
* @return true|WP_Error
*/
private function write_image( $image, $filename ) {
if ( wp_is_stream( $filename ) ) {
/*
* Due to reports of issues with streams with `Imagick::writeImageFile()` and `Imagick::writeImage()`, copies the blob instead.
* Checks for exact type due to: https://www.php.net/manual/en/function.file-put-contents.php
*/
if ( file_put_contents( $filename, $image->getImageBlob() ) === false ) {
return new WP_Error(
'image_save_error',
sprintf(
/* translators: %s: PHP function name. */
__( '%s failed while writing image to stream.' ),
'<code>file_put_contents()</code>'
),
$filename
);
} else {
return true;
}
} else {
$dirname = dirname( $filename );
if ( ! wp_mkdir_p( $dirname ) ) {
return new WP_Error(
'image_save_error',
sprintf(
/* translators: %s: Directory path. */
__( 'Unable to create directory %s. Is its parent directory writable by the server?' ),
esc_html( $dirname )
)
);
}
try {
return $image->writeImage( $filename );
} catch ( Exception $e ) {
return new WP_Error( 'image_save_error', $e->getMessage(), $filename );
}
}
}
/**
* Streams current image to browser.
*
* @since 3.5.0
*
* @param string $mime_type The mime type of the image.
* @return true|WP_Error True on success, WP_Error object on failure.
*/
public function stream( $mime_type = null ) {
list( $filename, $extension, $mime_type ) = $this->get_output_format( null, $mime_type );
try {
// Temporarily change format for stream.
$this->image->setImageFormat( strtoupper( $extension ) );
// Output stream of image content.
header( "Content-Type: $mime_type" );
print $this->image->getImageBlob();
// Reset image to original format.
$this->image->setImageFormat( $this->get_extension( $this->mime_type ) );
} catch ( Exception $e ) {
return new WP_Error( 'image_stream_error', $e->getMessage() );
}
return true;
}
/**
* Strips all image meta except color profiles from an image.
*
* @since 4.5.0
*
* @return true|WP_Error True if stripping metadata was successful. WP_Error object on error.
*/
protected function strip_meta() {
if ( ! is_callable( array( $this->image, 'getImageProfiles' ) ) ) {
return new WP_Error(
'image_strip_meta_error',
sprintf(
/* translators: %s: ImageMagick method name. */
__( '%s is required to strip image meta.' ),
'<code>Imagick::getImageProfiles()</code>'
)
);
}
if ( ! is_callable( array( $this->image, 'removeImageProfile' ) ) ) {
return new WP_Error(
'image_strip_meta_error',
sprintf(
/* translators: %s: ImageMagick method name. */
__( '%s is required to strip image meta.' ),
'<code>Imagick::removeImageProfile()</code>'
)
);
}
/*
* Protect a few profiles from being stripped for the following reasons:
*
* - icc: Color profile information
* - icm: Color profile information
* - iptc: Copyright data
* - exif: Orientation data
* - xmp: Rights usage data
*/
$protected_profiles = array(
'icc',
'icm',
'iptc',
'exif',
'xmp',
);
try {
// Strip profiles.
foreach ( $this->image->getImageProfiles( '*', true ) as $key => $value ) {
if ( ! in_array( $key, $protected_profiles, true ) ) {
$this->image->removeImageProfile( $key );
}
}
} catch ( Exception $e ) {
return new WP_Error( 'image_strip_meta_error', $e->getMessage() );
}
return true;
}
/**
* Sets up Imagick for PDF processing.
* Increases rendering DPI and only loads first page.
*
* @since 4.7.0
*
* @return string|WP_Error File to load or WP_Error on failure.
*/
protected function pdf_setup() {
try {
/*
* By default, PDFs are rendered in a very low resolution.
* We want the thumbnail to be readable, so increase the rendering DPI.
*/
$this->image->setResolution( 128, 128 );
// Only load the first page.
return $this->file . '[0]';
} catch ( Exception $e ) {
return new WP_Error( 'pdf_setup_failed', $e->getMessage(), $this->file );
}
}
/**
* Load the image produced by Ghostscript.
*
* Includes a workaround for a bug in Ghostscript 8.70 that prevents processing of some PDF files
* when `use-cropbox` is set.
*
* @since 5.6.0
*
* @return true|WP_Error
*/
protected function pdf_load_source() {
$filename = $this->pdf_setup();
if ( is_wp_error( $filename ) ) {
return $filename;
}
try {
/*
* When generating thumbnails from cropped PDF pages, Imagemagick uses the uncropped
* area (resulting in unnecessary whitespace) unless the following option is set.
*/
$this->image->setOption( 'pdf:use-cropbox', true );
/*
* Reading image after Imagick instantiation because `setResolution`
* only applies correctly before the image is read.
*/
$this->image->readImage( $filename );
} catch ( Exception $e ) {
// Attempt to run `gs` without the `use-cropbox` option. See #48853.
$this->image->setOption( 'pdf:use-cropbox', false );
$this->image->readImage( $filename );
}
return true;
}
}
في عصر تتسارع فيه وتيرة التطورات التكنولوجية، أصبح من الواضح أن هذه التغيرات تؤثر بشكل عميق على جميع جوانب الحياة، بما في ذلك الممارسات الدينية. هذا التحقيق يستعرض كيف تؤثر التطبيقات الدينية على سلوكيات الأفراد ومعتقداتهم، وكيف يمكن أن تكون أداة لتعزيز الإيمان أو تهديداً لجذوره.
التطبيقات الدينية: أدوات جديدة للإيمان
تتعدد التطبيقات المستخدمة في الممارسات الدينية، وتلعب دورًا مهمًا في حياة المؤمنين. في المسيحية، يُعتبر تطبيق “أرثوذكسي” من أبرز الأدوات التي تساعد الأفراد في أداء الصلوات وقراءة الكتاب المقدس. يحتوي التطبيق على صلوات وأدعية تسهل على المستخدمين الالتزام بممارساتهم الروحية يوميًا.
أما في الإسلام، يبرز تطبيق “Majeed Quran” كمنصة تقدم تجربة قرآنية متكاملة، تشمل الصوتيات والواجهة البصرية، وتوفر للمستخدمين إمكانية الاستماع إلى تلاوات من قراء مشهورين. بالإضافة إلى ذلك، يوجد العديد من التطبيقات الأخرى مثل “Pro Muslim” التي توفر مواقيت الصلاة والأذكار، مما يسهم في تسهيل ممارسة الشعائر.
آراء الشيوخ والكهنة: وجهات نظر متعددة
تتباين آراء الشيوخ والكهنة حول تأثير التكنولوجيا على الدين. المعلمة أمل علي، خريجة علوم الشريعة، تشير إلى أن التطبيقات قد تلهي الأفراد عن العبادة، رغم فوائدها في تسهيل الوصول إلى المعرفة الدينية. إذ يمكن من خلال الإنترنت الاطلاع على فتاوى من مصادر موثوقة والتواصل مع رجال الدين.
في المقابل، الكاهن إبراهيم فؤاد يرى أن التكنولوجيا أصبحت وسيلة أسهل وأسرع للمؤمنين، خاصة في ظل الظروف الاستثنائية مثل جائحة كورونا، التي دفعت الكثيرين للاعتماد على التطبيقات لأداء شعائرهم. الكاهن داوود غبلاير يؤكد أن هذه التطبيقات تساعد جميع الفئات العمرية، بينما يعبر الكاهن يسطس صبحي عن أهمية عدم نسيان دور أماكن العبادة، مشددًا على أن التطبيقات ليست بديلاً عن التجمعات الروحية.
صوت المستخدمين: تجارب شخصية
تتباين آراء المستخدمين حول التطبيقات الدينية، مما يعكس تنوع التجارب. ففاطمة، مستخدمة نشطة، تجد أن التطبيقات تعزز من ارتباطها بدينها وتساعدها في تنظيم عباداتها. تقول: “تطبيقات الهاتف تساعدني في البقاء متصلة بديني وفي الوقت نفسه تسهل لي الكثير من الأمور الروحية”.
من جهة أخرى، يشير أحمد، شاب في العشرينات، إلى أن “الأجواء الروحية في المساجد لا يمكن تعويضها”، ويضيف أن التطبيقات قد تكون مفيدة، لكن لا يمكنها أن تحل محل التجمعات التقليدية. هذه الآراء تسلط الضوء على التحديات والفرص التي تقدمها التكنولوجيا.
المخاطر المحتملة: التحديات أمام الإيمان
رغم الفوائد التي تقدمها التطبيقات، هناك مخاطر ينبغي الانتباه إليها. من أبرز هذه المخاطر انتشار المعلومات الخاطئة، حيث يصعب التحقق من صحة المحتوى المتداول، مما قد يؤدي إلى نشر أفكار مضللة. كما أن الاعتماد المفرط على التكنولوجيا قد يؤدي إلى الشعور بالانعزال الاجتماعي، مما يؤثر سلبًا على الروابط المجتمعية.
إيجابيات التكنولوجيا: فوائد لا يمكن تجاهلها
تقدم التطبيقات الدينية مجموعة من الفوائد التي لا يمكن إغفالها. فهي تتيح سهولة الوصول إلى النصوص المقدسة، وتساعد في تنظيم الممارسات الدينية، مما يعزز الالتزام اليومي. بالإضافة إلى ذلك، تعزز هذه التطبيقات من التعلم والتفاعل، مما يسهم في فهم أعمق للدين.
توصيات لتحسين الاستخدام
لتحقيق توازن بين التكنولوجيا والتقاليد، ينبغي على المطورين:
تقييم المحتوى: التعاون مع العلماء لضمان دقة المعلومات المقدمة، وإجراء مراجعات دورية للمحتوى.
تعزيز التفاعل الإنساني: تنظيم فعاليات تجمع بين المستخدمين والخبراء في الدين، مثل الندوات وورش العمل.
توفير موارد تعليمية متنوعة: إدماج محتوى تعليمي تفاعلي وجذاب، يشمل مقاطع الفيديو والدروس عبر الإنترنت.
تشجيع الاستخدام الإيجابي: تطوير تطبيقات تساعد في تتبع تقدم المستخدمين في ممارساتهم الدينية، مما يعزز الانضباط الشخصي.
تتطلب التكنولوجيا المتزايدة في الممارسات الدينية وعياً عميقاً لتأثيرها على الإيمان، ومن الضروري الحفاظ على توازن بين استخدام التطبيقات والتمسك بالتقاليد الدينية لضمان استمرارية الروابط الروحية، كما يجب أن نعمل جميعًا على تعزيز استخدام التكنولوجيا كأداة لتعزيز الإيمان، مع الحرص على عدم فقدان الجوانب الروحية والاجتماعية التي توفرها التجمعات التقليدية.
