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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/57607">57607</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/57607","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>adamsilverstein</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2024-02-12 23:24:19 +0000 (Mon, 12 Feb 2024)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Media: enable control of progressive image output.

Add a new `image_save_progressive` filter which developers can use to control whether intermediate image sizes are saved in a progressive format (when available). By default, progressive image output is not used, matching the previous behavior.

Props: adamsilverstein, _ck_, markoheijnen, SergeyBiryukov, Japh, pmeenan, mikeschroder, derekspringer, buley, ericlewis, bahia0019, born2webdesign.
Fixes <a href="https://core.trac.wordpress.org/ticket/21668">#21668</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesclasswpimageeditorgdphp">trunk/src/wp-includes/class-wp-image-editor-gd.php</a></li>
<li><a href="#trunksrcwpincludesclasswpimageeditorimagickphp">trunk/src/wp-includes/class-wp-image-editor-imagick.php</a></li>
</ul>

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<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesclasswpimageeditorgdphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/class-wp-image-editor-gd.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/class-wp-image-editor-gd.php        2024-02-12 23:08:55 UTC (rev 57606)
+++ trunk/src/wp-includes/class-wp-image-editor-gd.php  2024-02-12 23:24:19 UTC (rev 57607)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -504,6 +504,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        $filename = $this->generate_filename( null, null, $extension );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                if ( function_exists( 'imageinterlace' ) ) {
+                       /** This filter is documented in wp-includes/class-wp-image-editor-imagick.php */
+                       imageinterlace( $image, apply_filters( 'image_save_progressive', false, $mime_type ) );
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 if ( 'image/gif' === $mime_type ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        if ( ! $this->make_image( $filename, 'imagegif', array( $image, $filename ) ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) );
</span></span></pre></div>
<a id="trunksrcwpincludesclasswpimageeditorimagickphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/class-wp-image-editor-imagick.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/class-wp-image-editor-imagick.php   2024-02-12 23:08:55 UTC (rev 57606)
+++ trunk/src/wp-includes/class-wp-image-editor-imagick.php     2024-02-12 23:24:19 UTC (rev 57607)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -489,10 +489,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                        $this->image->setImageDepth( 8 );
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
-                       if ( is_callable( array( $this->image, 'setInterlaceScheme' ) ) && defined( 'Imagick::INTERLACE_NO' ) ) {
-                               $this->image->setInterlaceScheme( Imagick::INTERLACE_NO );
-                       }
</del><span class="cx" style="display: block; padding: 0 10px">                 } catch ( Exception $e ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        return new WP_Error( 'image_resize_error', $e->getMessage() );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -825,6 +821,23 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        return new WP_Error( 'image_save_error', $e->getMessage(), $filename );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                if ( method_exists( $this->image, 'setInterlaceScheme' ) && method_exists( $this->image, 'getInterlaceScheme' ) && defined( 'Imagick::INTERLACE_PLANE' ) ) {
+                       $orig_interlace = $this->image->getInterlaceScheme();
+                       /**
+                        * Filters whether to output progressive images (if available).
+                        *
+                        * @since 6.5.0
+                        *
+                        * @param bool   $interlace Whether to use progressive images for output if available. Default false.
+                        * @param string $mime_type The mime type being saved.
+                        */
+                       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.
+                       }
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 $write_image_result = $this->write_image( $this->image, $filename );
</span><span class="cx" style="display: block; padding: 0 10px">                if ( is_wp_error( $write_image_result ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        return $write_image_result;
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -833,6 +846,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">                try {
</span><span class="cx" style="display: block; padding: 0 10px">                        // Reset original format.
</span><span class="cx" style="display: block; padding: 0 10px">                        $this->image->setImageFormat( $orig_format );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        if ( isset( $orig_interlace ) ) {
+                               $this->image->setInterlaceScheme( $orig_interlace );
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px">                 } catch ( Exception $e ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        return new WP_Error( 'image_save_error', $e->getMessage(), $filename );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span></span></pre>
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