resize qr code and logo for better scannability

Author: TamaroWalter

classes/output/renderer.php

@@ -44,7 +44,7 @@ public function display_image($courseid, $instanceid) {
             'courseid' => $courseid,
             'download' => false,
             'format' => 1,
-            'size' => 150,
+            'size' => 300,
             'instance' => $instanceid]);
 
         return \html_writer::img(
@@ -64,7 +64,7 @@ public function display_download_section($courseid, $instanceid) {
             'download' => true,
             'instance' => $instanceid]);
         $mform = new \block_qrcode\block_qrcode_form(
-            $download, ['format' => 1, 'size' => 150], 'post', '',
+            $download, ['format' => 1, 'size' => 300], 'post', '',
             ['data-double-submit-protection' => 'off']);
         return $mform->render();
     }

classes/output_image.php

@@ -181,7 +181,7 @@ public function create_image() {
                 }
                 $logo = new Logo(
                     $logopath,
-                    intval($this->size * 0.4),
+                    intval($this->size * 0.25),
                     null,
                     false
                 );
@@ -193,8 +193,8 @@ public function create_image() {
                         : $CFG->dirroot . '/blocks/qrcode/pix/moodlelogo.svg';
                 $logo = new Logo(
                     $logopath,
-                    intval($this->size * 0.4),
-                    intval($this->size * 0.4 / $this->get_logo_aspect_ratio($logopath)),
+                    intval($this->size * 0.25),
+                    intval($this->size * 0.25 / $this->get_logo_aspect_ratio($logopath)),
                     false
                 );
             }

download.php

@@ -29,7 +29,7 @@
 $download = required_param('download', PARAM_BOOL);
 $format = required_param('format', PARAM_TEXT);
 $instanceid = required_param('instance', PARAM_INT);
-$size = optional_param('size', 150, PARAM_INT);
+$size = optional_param('size', 300, PARAM_INT);
 
 if ($download) {
     require_capability('block/qrcode:download', context_course::instance($courseid));