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Allow plugin to add retina image sizes #5

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Allow plugin to add retina image sizes #5

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7624552
Allow plugin to add retina image sizes
mattheu Oct 15, 2014
e2fb53b
remove test code
mattheu Oct 15, 2014
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33 changes: 30 additions & 3 deletions high-resoloution-images-with-srcset.php
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,10 @@ function __construct() {
add_filter( 'image_send_to_editor', array( $this, 'image_send_to_editor' ), 100, 8 );
add_filter( 'tiny_mce_before_init', array( $this, 'modify_mce_options' ), 100 );

if ( defined( 'HM_WP_SRCSET_ADD_2X_IMAGE_SIZES' ) && HM_WP_SRCSET_ADD_2X_IMAGE_SIZES ) {
$this->add_2x_image_sizes();
}

}

/**
Expand All @@ -66,7 +70,7 @@ function plugin_activation_check() {
*/
function enqueue_scripts() {

wp_enqueue_script( 'picturefill', $this->plugin_url . '/picturefill/dist/picturefill.min.js', false, false, true );
wp_enqueue_script( 'picturefill', $this->plugin_url . 'picturefill/dist/picturefill.min.js', false, false, true );

}

Expand Down Expand Up @@ -103,8 +107,10 @@ function image_downsize( $null, $attachment_id, $size ) {
}
}

$attr['src'] = $requested_image[0];
$attr['srcset'] = implode( ', ', $srcset );
if ( ! empty( $srcset ) ) {
$attr['src'] = $requested_image[0];
$attr['srcset'] = implode( ', ', $srcset );
}

add_filter( 'image_downsize', array( $that, 'image_downsize' ), 100, 3 );

Expand Down Expand Up @@ -219,6 +225,27 @@ function modify_mce_options( Array $init ) {

}

function add_2x_image_sizes() {
global $_wp_additional_image_sizes;
foreach ( get_intermediate_image_sizes() as $size ) {

if ( in_array( $size, array( 'thumbnail', 'medium', 'large' ) ) ) {
$args = array(
'width' => get_option( 'thumbnail_size_w' ),
'height' => get_option( 'thumbnail_size_h' ),
'crop' => get_option( 'thumbnail_size_crop' )
);
} elseif ( isset( $_wp_additional_image_sizes[ $size ] ) ) {
$args = $_wp_additional_image_sizes[ $size ];
} else {
continue;
}

add_image_size( $size . '2x', $args['width'] * 2, $args['height'] * 2, $args['crop'] );

}
}

}

$retina = new HM_WP_Srcset();