Add possibility to disable FboSource::draw() when needed

src/Sources/FboSource.cpp

@@ -8,6 +8,7 @@ FboSource::FboSource() : fbo(0){
 	loadable = false;
 	loaded = false;
 	type = SourceType::SOURCE_TYPE_FBO;
+	_disableDraw = false;
 }
 
 FboSource::~FboSource(){
@@ -48,6 +49,11 @@ void FboSource::onAppDraw(ofEventArgs & args){
 		ofLogWarning("FboSource") << "FBO not allocated";
 		return;
 	}
+	
+	if(_disableDraw){
+		return;
+	}
+	
 	fbo->begin();
 	draw();
 	fbo->end();
@@ -57,6 +63,10 @@ void FboSource::onAppExit(ofEventArgs & args){
 	exit();
 }
 
+void FboSource::setDisableDraw(bool b){
+	_disableDraw = b;
+}
+
 void FboSource::allocate(int width, int height){
 	clear();
 	fbo = new ofFbo();

src/Sources/FboSource.h

@@ -30,6 +30,7 @@ class FboSource : public BaseSource {
 		void onAppUpdate(ofEventArgs & args);
 		void onAppDraw(ofEventArgs & args);
 		void onAppExit(ofEventArgs & args);
+		void setDisableDraw(bool b); // Use in cases with external ofFbo
 
 	protected:
 		ofFbo * fbo;
@@ -39,6 +40,7 @@ class FboSource : public BaseSource {
 		int getWidth();
 		int getHeight();
 	
+		bool _disableDraw;
 };
 
 } // namespace piMapper