Store image size in XML

and discard loaded image if size does not match

SessionCreator.cpp

@@ -552,6 +552,10 @@ FrameBufferImage *SessionLoader::XMLToImage(tinyxml2::XMLElement *xml)
         // if there is an Image mask stored
         XMLElement* imageNode = xml->FirstChildElement("Image");
         if (imageNode) {
+            // get theoretical image size
+            int w = 0, h = 0;
+            imageNode->QueryIntAttribute("width", &w);
+            imageNode->QueryIntAttribute("height", &h);
             // if there is an internal array of data
             XMLElement* array = imageNode->FirstChildElement("array");
             if (array) {
@@ -566,6 +570,11 @@ FrameBufferImage *SessionLoader::XMLToImage(tinyxml2::XMLElement *xml)
                     if (XMLElementDecodeArray(array, jpgimg.buffer, jpgimg.len) ) {
                         // create and set the image from jpeg
                         i = new FrameBufferImage(jpgimg);
+                        // failed if wrong size
+                        if ( (w>0 && h>0) && (i->width != w || i->height != h) ) {
+                            delete i;
+                            i = nullptr;
+                        }
                     }
                     // free temporary buffer
                     if (jpgimg.buffer)
@@ -741,7 +750,8 @@ void SessionLoader::visit (Source& s)
     }
 
     xmlCurrent_ = sourceNode->FirstChildElement("Blending");
-    if (xmlCurrent_) s.blendingShader()->accept(*this);
+    if (xmlCurrent_)
+        s.blendingShader()->accept(*this);
 
     xmlCurrent_ = sourceNode->FirstChildElement("Mask");
     if (xmlCurrent_)  {

SessionCreator.h

@@ -32,7 +32,7 @@ public:
     static bool isClipboard(const std::string &clipboard);
     static tinyxml2::XMLElement* firstSourceElement(const std::string &clipboard, tinyxml2::XMLDocument &xmlDoc);
     static void applyImageProcessing(const Source &s, const std::string &clipboard);
-    //TODO static void applyMask(const Source &s, std::string clipboard);
+    //TODO static void applyMask(const Source &s, const std::string &clipboard);
 
     // Elements of Scene
     void visit (Node& n) override;
@@ -90,6 +90,7 @@ public:
     void load(const std::string& filename);
 
     static std::string info(const std::string& filename);
+//    static std::string thumbnail(const std::string& filename);
 };
 
 #endif // SESSIONCREATOR_H

SessionVisitor.cpp

@@ -49,6 +49,13 @@ bool SessionVisitor::saveSession(const std::string& filename, Session *session)
         // source visitor
         (*iter)->accept(sv);
 
+    // get the thumbnail
+    FrameBufferImage *thumbnail = session->thumbnail();
+    XMLElement *imageelement = SessionVisitor::ImageToXML(thumbnail, &xmlDoc);
+    if (imageelement)
+        sessionNode->InsertEndChild(imageelement);
+    delete thumbnail;
+
     // 2. config of views
     XMLElement *views = xmlDoc.NewElement("Views");
     xmlDoc.InsertEndChild(views);
@@ -161,6 +168,8 @@ XMLElement *SessionVisitor::ImageToXML(FrameBufferImage *img, XMLDocument *doc)
             if (array) {
                 // create an Image node to store the mask image
                 imageelement = doc->NewElement("Image");
+                imageelement->SetAttribute("width", img->width);
+                imageelement->SetAttribute("height", img->height);
                 imageelement->InsertEndChild(array);
             }
         }

Source.cpp

@@ -762,8 +762,11 @@ void Source::setMask(FrameBufferImage *img)
         // ask to update the source
         touch();
     }
-    else
+    else {
+        // CANCEL mask if set to null
         mask_need_update_ = false;
+        maskshader_->mode = MaskShader::NONE;
+    }
 }
 
 bool Source::hasNode::operator()(const Source* elem) const