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Add support for WP Retina 2x (tested with free version), for post cover
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@jefferyto
jefferyto committed Mar 8, 2023
1 parent 7e3b172 commit b4129a4
Showing 1 changed file with 56 additions and 24 deletions.
80 changes: 56 additions & 24 deletions inc/template-tags.php
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Original file line number Diff line number Diff line change
Expand Up @@ -629,6 +629,7 @@ function independent_publisher_full_width_featured_image() {
$featured_image_srcset = function_exists( 'wp_get_attachment_image_srcset' ) ? wp_get_attachment_image_srcset( get_post_thumbnail_id() ) : false;
$featured_image_srcset = $featured_image_srcset ? explode( ',', $featured_image_srcset ) : false;
$featured_image_versions = array();
$featured_image_high_dpi = array();

if ( $featured_image_srcset ) {
foreach ( $featured_image_srcset as $url_width_str ) {
Expand All @@ -640,44 +641,75 @@ function independent_publisher_full_width_featured_image() {
}
}

if ( $featured_image_versions ) {
usort( $featured_image_versions,
function ( $a, $b ) {
$a = intval( $a[1] );
$b = intval( $b[1] );
return $a < $b ? -1 : ($a > $b ? 1 : 0);
if ( $featured_image_versions && class_exists( 'Meow_WR2X_Core' ) ) { // WP Retina 2x support
$featured_image_base = array();
foreach ( $featured_image_versions as $url_width ) {
if ( preg_match( '/.@2x\.\w+$/', $url_width[0] ) ) {
$url_width[1] = $url_width[1] / 2;
array_push( $featured_image_high_dpi, $url_width );
} else {
array_push( $featured_image_base, $url_width );
}
);
}
$featured_image_versions = $featured_image_base;
}

function url_width_cmp( $a, $b ) {
$a = intval( $a[1] );
$b = intval( $b[1] );
return $a < $b ? -1 : ( $a > $b ? 1 : 0 );
}

usort( $featured_image_versions, 'url_width_cmp' );
usort( $featured_image_high_dpi, 'url_width_cmp' );

function post_cover_title_image_css( $url ) {
?>
.single.post-cover-overlay-post-title .post-cover-title-image,
.page.post-cover-overlay-post-title .post-cover-title-image {
background-image: url(<?php echo $url; ?>);
}
<?php
}
?>
<?php if ( $featured_image_versions ) : ?>
<style>
<?php for ($i = 0, $l = count( $featured_image_versions ); $i < $l; $i++) : ?>
@media only screen
<?php if ($i > 0) : ?>and (min-width: <?php echo $featured_image_versions[$i - 1][1] + 1; ?>px)<?php endif; ?>
<?php if ($i < $l - 1) : ?>and (max-width: <?php echo $featured_image_versions[$i][1]; ?>px)<?php endif; ?>
{
.single.post-cover-overlay-post-title .post-cover-title-image,
.page.post-cover-overlay-post-title .post-cover-title-image {
background-image: url(<?php echo $featured_image_versions[$i][0]; ?>);
}
<?php for ($i = 0, $l = count( $featured_image_versions ); $i < $l; $i++) :
$url = $featured_image_versions[$i][0];
$width = $featured_image_versions[$i][1];
$query = 'only screen' .
( $i > 0 ? ' and (min-width: ' . ( $prev_width + 1 ) . 'px)' : '' ) .
( $i < $l - 1 ? ' and (max-width: ' . ( $width ) . 'px)' : '' );
?>
@media <?php echo $query; ?> {
<?php post_cover_title_image_css( $url ); ?>
}
<?php $prev_width = $width; ?>
<?php endfor; ?>

<?php for ($i = 0, $l = count( $featured_image_high_dpi ); $i < $l; $i++) :
$url = $featured_image_high_dpi[$i][0];
$width = $featured_image_high_dpi[$i][1];
$query = 'only screen' .
( $i > 0 ? ' and (min-width: ' . ( $prev_width + 1 ) . 'px)' : '' ) .
( $i < $l - 1 ? ' and (max-width: ' . ( $width ) . 'px)' : '' );
?>
@media <?php echo $query; ?> and (-webkit-min-device-pixel-ratio: 1.25),
<?php echo $query; ?> and (min-resolution: 120dpi) {
<?php post_cover_title_image_css( $url ); ?>
}
<?php $prev_width = $width; ?>
<?php endfor; ?>
</style>

<!--[if lt IE 9]>
<style>
.single.post-cover-overlay-post-title .post-cover-title-image,
.page.post-cover-overlay-post-title .post-cover-title-image {
background-image: url(<?php echo $featured_image_url; ?>);
}
<?php post_cover_title_image_css( $featured_image_url ); ?>
</style>
<![endif]-->
<?php else : ?>
<style>
.single.post-cover-overlay-post-title .post-cover-title-image,
.page.post-cover-overlay-post-title .post-cover-title-image {
background-image: url(<?php echo $featured_image_url; ?>);
}
<?php post_cover_title_image_css( $featured_image_url ); ?>
</style>
<?php endif; ?>
<div class="post-cover-title-wrapper">
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