closes #6373

public/language/en-GB/admin/settings/uploads.json

@@ -4,6 +4,8 @@
 	"private": "Make uploaded files private",
 	"max-image-width": "Resize images down to specified width (in pixels)",
 	"max-image-width-help": "(in pixels, default: 760 pixels, set to 0 to disable)",
+	"resize-image-quality": "Quality to use when resizing images",
+	"resize-image-quality-help": "Use a lower quality setting to reduce the file size of resized images.",
 	"max-file-size": "Maximum File Size (in KiB)",
 	"max-file-size-help": "(in kibibytes, default: 2048 KiB)",
 	"allow-topic-thumbnails": "Allow users to upload topic thumbnails",

src/controllers/uploads.js

@@ -118,6 +118,7 @@ function resizeImage(fileObj, callback) {
 				target: path.join(dirname, basename + '-resized' + extname),
 				extension: extname,
 				width: parseInt(meta.config.maximumImageWidth, 10) || 760,
+				quality: parseInt(meta.config.resizeImageQuality, 10) || 60,
 			}, next);
 		},
 		function (next) {

src/image.js

@@ -20,6 +20,7 @@ image.resizeImage = function (data, callback) {
 			extension: data.extension,
 			width: data.width,
 			height: data.height,
+			quality: data.quality,
 		}, function (err) {
 			callback(err);
 		});
@@ -73,6 +74,12 @@ image.resizeImage = function (data, callback) {
 						next(null, image);
 					}
 				},
+				function (image, next) {
+					if (data.quality) {
+						image.quality(data.quality);
+					}
+					next(null, image);
+				},
 				function (image, next) {
 					image.write(data.target || data.path, next);
 				},

src/views/admin/settings/uploads.tpl

@@ -28,6 +28,14 @@
 				</p>
 			</div>
 
+			<div class="form-group">
+				<label for="resizeImageQuality">[[admin/settings/uploads:resize-image-quality]]</label>
+				<input type="text" class="form-control" value="60" data-field="resizeImageQuality" placeholder="60">
+				<p class="help-block">
+					[[admin/settings/uploads:resize-image-quality-help]]
+				</p>
+			</div>
+
 			<div class="form-group">
 				<label for="maximumFileSize">[[admin/settings/uploads:max-file-size]]</label>
 				<input type="text" class="form-control" value="2048" data-field="maximumFileSize">