2 files changed, 13 insertions, 13 deletions

diff --git a/avatar.cpp b/avatar.cpp
index eeb61f30..ee7db6ed 100644
--- a/avatar.cpp
+++ b/avatar.cpp
@@ -30,19 +30,19 @@ class Avatar::Private
 {
     public:
         Private(Connection* c, QIcon di) : _connection(c), _defaultIcon(di) { }
-        QImage get(QSize size, Avatar::notifier_t notifier);
+        QImage get(QSize size, Avatar::notifier_t notifier) const;
 
         Connection* _connection;
         const QIcon _defaultIcon;
         QUrl _url;
-        QImage _originalImage;
 
-        std::vector<QPair<QSize, QImage>> _scaledImages;
-
-        QSize _requestedSize;
-        bool _valid = false;
-        MediaThumbnailJob* _ongoingRequest = nullptr;
-        std::vector<notifier_t> notifiers;
+        // The below are related to image caching, hence mutable
+        mutable QImage _originalImage;
+        mutable std::vector<QPair<QSize, QImage>> _scaledImages;
+        mutable QSize _requestedSize;
+        mutable bool _valid = false;
+        mutable MediaThumbnailJob* _ongoingRequest = nullptr;
+        mutable std::vector<notifier_t> notifiers;
 };
 
 Avatar::Avatar(Connection* connection, QIcon defaultIcon)
@@ -51,17 +51,17 @@ Avatar::Avatar(Connection* connection, QIcon defaultIcon)
 
 Avatar::~Avatar() = default;
 
-QImage Avatar::get(int dimension, Avatar::notifier_t notifier)
+QImage Avatar::get(int dimension, notifier_t notifier) const
 {
     return d->get({dimension, dimension}, notifier);
 }
 
-QImage Avatar::get(int width, int height, Avatar::notifier_t notifier)
+QImage Avatar::get(int width, int height, notifier_t notifier) const
 {
     return d->get({width, height}, notifier);
 }
 
-QImage Avatar::Private::get(QSize size, Avatar::notifier_t notifier)
+QImage Avatar::Private::get(QSize size, Avatar::notifier_t notifier) const
 {
     // FIXME: Alternating between longer-width and longer-height requests
     // is a sure way to trick the below code into constantly getting another
diff --git a/avatar.h b/avatar.h
index bf9cfdcd..28c16e4d 100644
--- a/avatar.h
+++ b/avatar.h
@@ -35,8 +35,8 @@ namespace QMatrixClient
 
             using notifier_t = std::function<void()>;
 
-            QImage get(int dimension, notifier_t notifier);
-            QImage get(int w, int h, notifier_t notifier);
+            QImage get(int dimension, notifier_t notifier) const;
+            QImage get(int w, int h, notifier_t notifier) const;
 
             QUrl url() const;
             bool updateUrl(const QUrl& newUrl);