Checks if the file exists before it passes the file to photon
| protected static strip_image_dimensions_maybe ( string $src ) : string | ||
| $src | string | The image URL |
| return | string | |
/**
* Filters an array of image `srcset` values, replacing each URL with its Photon equivalent.
*
* @since 3.8.0
* @since 4.0.4 Added automatically additional sizes beyond declared image sizes.
* @param array $sources An array of image urls and widths.
* @uses self::validate_image_url, jetpack_photon_url, Jetpack_Photon::parse_from_filename
* @uses Jetpack_Photon::strip_image_dimensions_maybe, Jetpack::get_content_width
* @return array An array of Photon image urls and widths.
*/
public function filter_srcset_array($sources, $size_array, $image_src, $image_meta)
{
$upload_dir = wp_upload_dir();
foreach ($sources as $i => $source) {
if (!self::validate_image_url($source['url'])) {
continue;
}
/** This filter is already documented in class.photon.php */
if (apply_filters('jetpack_photon_skip_image', false, $source['url'], $source)) {
continue;
}
$url = $source['url'];
list($width, $height) = Jetpack_Photon::parse_dimensions_from_filename($url);
// It's quicker to get the full size with the data we have already, if available
if (isset($image_meta['file'])) {
$url = trailingslashit($upload_dir['baseurl']) . $image_meta['file'];
} else {
$url = Jetpack_Photon::strip_image_dimensions_maybe($url);
}
$args = array();
if ('w' === $source['descriptor']) {
if ($height && $source['value'] == $width) {
$args['resize'] = $width . ',' . $height;
} else {
$args['w'] = $source['value'];
}
}
$sources[$i]['url'] = jetpack_photon_url($url, $args);
}
/**
* At this point, $sources is the original srcset with Photonized URLs.
* Now, we're going to construct additional sizes based on multiples of the content_width.
* This will reduce the gap between the largest defined size and the original image.
*/
/**
* Filter the multiplier Photon uses to create new srcset items.
* Return false to short-circuit and bypass auto-generation.
*
* @module photon
*
* @since 4.0.4
*
* @param array|bool $multipliers Array of multipliers to use or false to bypass.
*/
$multipliers = apply_filters('jetpack_photon_srcset_multipliers', array(2, 3));
$url = trailingslashit($upload_dir['baseurl']) . $image_meta['file'];
if (is_array($multipliers) && !apply_filters('jetpack_photon_skip_image', false, $url, null) && isset($image_meta['width']) && isset($image_meta['height']) && isset($image_meta['file']) && isset($size_array[0]) && isset($size_array[1])) {
$fullwidth = $image_meta['width'];
$fullheight = $image_meta['height'];
$reqwidth = $size_array[0];
$reqheight = $size_array[1];
$constrained_size = wp_constrain_dimensions($fullwidth, $fullheight, $reqwidth);
$expected_size = array($reqwidth, $reqheight);
if (abs($constrained_size[0] - $expected_size[0]) <= 1 && abs($constrained_size[1] - $expected_size[1]) <= 1) {
$crop = 'soft';
$base = Jetpack::get_content_width() ? Jetpack::get_content_width() : 1000;
// Provide a default width if none set by the theme.
} else {
$crop = 'hard';
$base = $reqwidth;
}
$currentwidths = array_keys($sources);
$newsources = null;
foreach ($multipliers as $multiplier) {
$newwidth = $base * $multiplier;
foreach ($currentwidths as $currentwidth) {
// If a new width would be within 100 pixes of an existing one or larger than the full size image, skip.
if (abs($currentwidth - $newwidth) < 50 || $newwidth > $fullwidth) {
continue 2;
// Back to the foreach ( $multipliers as $multiplier )
}
}
// foreach ( $currentwidths as $currentwidth ){
if ('soft' == $crop) {
$args = array('w' => $newwidth);
} else {
// hard crop, e.g. add_image_size( 'example', 200, 200, true );
$args = array('zoom' => $multiplier, 'resize' => $reqwidth . ',' . $reqheight);
}
$newsources[$newwidth] = array('url' => jetpack_photon_url($url, $args), 'descriptor' => 'w', 'value' => $newwidth);
}
// foreach ( $multipliers as $multiplier )
if (is_array($newsources)) {
$sources = array_merge($sources, $newsources);
}
}
// if ( isset( $image_meta['width'] ) && isset( $image_meta['file'] ) )
return $sources;
}
/**
* Filters an array of image `srcset` values, replacing each URL with its Photon equivalent.
*
* @since 3.8.0
* @param array $sources An array of image urls and widths.
* @uses self::validate_image_url, jetpack_photon_url
* @return array An array of Photon image urls and widths.
*/
public function filter_srcset_array($sources)
{
foreach ($sources as $i => $source) {
if (!self::validate_image_url($source['url'])) {
continue;
}
$url = Jetpack_Photon::strip_image_dimensions_maybe($source['url']);
$args = array();
if ('w' === $source['descriptor']) {
$args['w'] = $source['value'];
}
$sources[$i]['url'] = jetpack_photon_url($url, $args);
}
return $sources;
}
/**
* Filters an array of image `srcset` values, replacing each URL with its Photon equivalent.
*
* @since 3.8.0
* @param array $sources An array of image urls and widths.
* @uses self::validate_image_url, jetpack_photon_url
* @return array An array of Photon image urls and widths.
*/
public function filter_srcset_array($sources, $size_array, $image_src, $image_meta)
{
$upload_dir = wp_upload_dir();
foreach ($sources as $i => $source) {
if (!self::validate_image_url($source['url'])) {
continue;
}
$url = $source['url'];
list($width, $height) = Jetpack_Photon::parse_dimensions_from_filename($url);
// It's quicker to get the full size with the data we have already, if available
if (isset($image_meta['file'])) {
$url = trailingslashit($upload_dir['baseurl']) . $image_meta['file'];
} else {
$url = Jetpack_Photon::strip_image_dimensions_maybe($url);
}
$args = array();
if ('w' === $source['descriptor']) {
if ($height && $source['value'] == $width) {
$args['resize'] = $width . ',' . $height;
} else {
$args['w'] = $source['value'];
}
}
$sources[$i]['url'] = jetpack_photon_url($url, $args);
}
return $sources;
}
