From d8bbde74d7e0173dd0fed00276b9816d2e7566fb Mon Sep 17 00:00:00 2001
From: Ryan Cramer <ryan@processwire.com>
Date: Fri, 24 May 2019 14:22:07 -0400
Subject: [PATCH] A couple other ImageSizerEngine adjustments for webp

---
 wire/core/ImageSizerEngine.php   | 18 +++++++++++-------
 wire/core/ImageSizerEngineGD.php |  2 +-
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/wire/core/ImageSizerEngine.php b/wire/core/ImageSizerEngine.php
index be7ba089..599629e2 100755
--- a/wire/core/ImageSizerEngine.php
+++ b/wire/core/ImageSizerEngine.php
@@ -1657,13 +1657,17 @@ abstract class ImageSizerEngine extends WireData implements Module, Configurable
 			return false; // fallback or failed
 		}
 
-		// all went well, copy back the temp file, remove the temp file
-		if(!@copy($this->tmpFile, $this->filename)) return false; // fallback or failed 
-		$this->wire('files')->chmod($this->filename);
-		$this->wire('files')->unlink($this->tmpFile);
-
-		// post processing: IPTC, setModified and reload ImageInfo
-		$this->writeBackIPTC($this->filename, false);
+		if($this->webpOnly) {
+			$this->wire('files')->unlink($this->tmpFile);
+		} else {
+			// all went well, copy back the temp file,
+			if(!@copy($this->tmpFile, $this->filename)) return false; // fallback or failed 
+			$this->wire('files')->chmod($this->filename);
+			// remove the temp file
+			$this->wire('files')->unlink($this->tmpFile);
+			// post processing: IPTC, setModified and reload ImageInfo
+			$this->writeBackIPTC($this->filename, false);
+		}
 		$this->setModified($this->modified);
 		$this->loadImageInfo($this->filename, true);
 
diff --git a/wire/core/ImageSizerEngineGD.php b/wire/core/ImageSizerEngineGD.php
index 45c89600..65bb9cb7 100755
--- a/wire/core/ImageSizerEngineGD.php
+++ b/wire/core/ImageSizerEngineGD.php
@@ -239,7 +239,7 @@ class ImageSizerEngineGD extends ImageSizerEngine {
 
 			// current version is already the desired result, we only may have to compress JPEGs but leave GIF and PNG as is:
 			
-			if(!$isModified && ($this->imageType == \IMAGETYPE_PNG || $this->imageType == \IMAGETYPE_GIF)) {
+			if(!$isModified && !$this->webpOnly && ($this->imageType == \IMAGETYPE_PNG || $this->imageType == \IMAGETYPE_GIF)) {
 				$result = @copy($srcFilename, $dstFilename);
 				if(isset($image) && is_resource($image)) @imagedestroy($image); // clean up
 				if(isset($image)) $image = null;