1072 lines
31 KiB
PHP
1072 lines
31 KiB
PHP
|
<?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
|
||
|
|
*
|
||
|
|
* @param int $quality Compression Quality. Range: [1,100]
|
||
|
|
* @return true|WP_Error True if set successfully; WP_Error on failure.
|
||
|
|
*/
|
||
|
|
public function set_quality( $quality = null ) {
|
||
|
|
$quality_result = parent::set_quality( $quality );
|
||
|
|
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->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->setOption( 'webp:lossless', 'true' );
|
||
|
|
} else {
|
||
|
|
$this->image->setImageCompressionQuality( $quality );
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 'image/avif':
|
||
|
|
default:
|
||
|
|
$this->image->setImageCompressionQuality( $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 images
|
||
|
|
* are properly sized without affecting previous `getImageGeometry` behavior.
|
||
|
|
*/
|
||
|
|
if ( ( ! $width || ! $height ) && 'image/avif' === $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 );
|
||
|
|
}
|
||
|
|
|
||
|
|
// 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' );
|
||
|
|
$this->image->setOption( 'png:exclude-chunk', 'all' );
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 to 8 bits per channel.
|
||
|
|
if ( is_callable( array( $this->image, 'getImageDepth' ) ) && is_callable( array( $this->image, 'setImageDepth' ) ) ) {
|
||
|
|
if ( 8 < $this->image->getImageDepth() ) {
|
||
|
|
$this->image->setImageDepth( 8 );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} 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;
|
||
|
|
}
|
||
|
|
}
|