1 files changed, 4 insertions, 1 deletions

diff --git a/libopie2/opiemm/oimagescrollview.cpp b/libopie2/opiemm/oimagescrollview.cpp
index 10da823..76f50e1 100644
--- a/libopie2/opiemm/oimagescrollview.cpp
+++ b/libopie2/opiemm/oimagescrollview.cpp
@@ -202,12 +202,13 @@ void OImageScrollView::setAutoScale(bool how)
 {
     m_states.setBit(AUTO_SCALE,how);
     _image_data = QImage();
     if (ImageIsJpeg() && how == false && ImageScaledLoaded()==true) {
         loadJpeg(true);
     }
+    _newImage = true;
     generateImage();
 }
 
 bool OImageScrollView::AutoScale()const
 {
     return m_states.testBit(AUTO_SCALE);
@@ -345,14 +346,16 @@ void OImageScrollView::rotate_into_data(Rotation r)
     _image_data = dest;
 }
 
 // yes - sorry - it is NOT gamma it is just BRIGHTNESS. Alwin
 void OImageScrollView::apply_gamma(int aValue)
 {
-    if (!_image_data.size().isValid()) return;
+    if (aValue==0 || !_image_data.size().isValid()) return;
     float percent = ((float)aValue/100.0);
+    /* make sure working on a copy */
+    _image_data.detach();
 
     int segColors = _image_data.depth() > 8 ? 256 : _image_data.numColors();
     /* must be - otherwise it displays some ... strange colors */
     if (segColors<256) segColors=256;
 
     unsigned char *segTbl = new unsigned char[segColors];