public static function test( $args = array() ) {
// First, test Imagick's extension and classes.
- if ( ! extension_loaded( 'imagick' ) || ! class_exists( 'Imagick' ) || ! class_exists( 'ImagickPixel' ) )
+ if ( ! extension_loaded( 'imagick' ) || ! class_exists( 'Imagick', false ) || ! class_exists( 'ImagickPixel', false ) )
return false;
if ( version_compare( phpversion( 'imagick' ), '2.2.0', '<' ) )
'setimagecompression',
'setimagecompressionquality',
'setimagepage',
+ 'setoption',
'scaleimage',
'cropimage',
'rotateimage',
if ( ! defined( 'imagick::COMPRESSION_JPEG' ) )
return false;
- if ( array_diff( $required_methods, get_class_methods( 'Imagick' ) ) )
+ $class_methods = array_map( 'strtolower', get_class_methods( 'Imagick' ) );
+ if ( array_diff( $required_methods, $class_methods ) ) {
return false;
+ }
+
+ // HHVM Imagick does not support loading from URL, so fail to allow fallback to GD.
+ if ( defined( 'HHVM_VERSION' ) && isset( $args['path'] ) && preg_match( '|^https?://|', $args['path'] ) ) {
+ return false;
+ }
return true;
}
$size = $this->image->getImageGeometry();
}
catch ( Exception $e ) {
- return new WP_Error( 'invalid_image', __('Could not read image size'), $this->file );
+ return new WP_Error( 'invalid_image', __( 'Could not read image size.' ), $this->file );
}
}
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
+ * @access protected
+ *
+ * @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 bool|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 our whitelist and the related
+ * Imagick constant is defined or fall back to our default filter.
+ */
+ if ( in_array( $filter_name, $allowed_filters ) && defined( 'Imagick::' . $filter_name ) ) {
+ $filter = constant( 'Imagick::' . $filter_name );
+ } else {
+ $filter = defined( 'Imagick::FILTER_TRIANGLE' ) ? Imagick::FILTER_TRIANGLE : false;
+ }
+
+ /**
+ * Filter 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 {
- /**
- * @TODO: Thumbnail is more efficient, given a newer version of Imagemagick.
- * $this->image->thumbnailImage( $dst_w, $dst_h );
+ /*
+ * 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 backwards 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.
*/
- $this->image->scaleImage( $dst_w, $dst_h );
+ 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 );
+ }
+ }
+
+ if ( is_callable( array( $this->image, 'setInterlaceScheme' ) ) && defined( 'Imagick::INTERLACE_NO' ) ) {
+ $this->image->setInterlaceScheme( Imagick::INTERLACE_NO );
+ }
+
}
catch ( Exception $e ) {
return new WP_Error( 'image_resize_error', $e->getMessage() );
}
-
- return $this->update_size( $dst_w, $dst_h );
}
/**
* @access public
*
* @param array $sizes {
- * An array of image size arrays. Default sizes are 'small', 'medium', 'large'.
+ * An array of image size arrays. Default sizes are 'small', 'medium', 'medium_large', 'large'.
*
* 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 $size {
- * @type int ['width'] Optional. Image width.
- * @type int ['height'] Optional. Image height.
+ * 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 $crop Optional. Whether to crop the image. Default false.
* }
* }
if ( ! $dst_h )
$dst_h = $src_h;
- $this->image->scaleImage( $dst_w, $dst_h );
+ $thumb_result = $this->thumbnail_image( $dst_w, $dst_h );
+ if ( is_wp_error( $thumb_result ) ) {
+ return $thumb_result;
+ }
+
return $this->update_size();
}
}
return true;
}
+
+ /**
+ * Strips all image meta except color profiles from an image.
+ *
+ * @since 4.5.0
+ * @access protected
+ *
+ * @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' ) ) ) {
+ /* translators: %s: ImageMagick method name */
+ return new WP_Error( 'image_strip_meta_error', sprintf( __( '%s is required to strip image meta.' ), '<code>Imagick::getImageProfiles()</code>' ) );
+ }
+
+ if ( ! is_callable( array( $this->image, 'removeImageProfile' ) ) ) {
+ /* translators: %s: ImageMagick method name */
+ return new WP_Error( 'image_strip_meta_error', sprintf( __( '%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 ) ) {
+ $this->image->removeImageProfile( $key );
+ }
+ }
+
+ } catch ( Exception $e ) {
+ return new WP_Error( 'image_strip_meta_error', $e->getMessage() );
+ }
+
+ return true;
+ }
+
}
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