diff --git a/src/gui/components/cc_draw.cpp b/src/gui/components/cc_draw.cpp
index 25c5df3c8..a1f11e340 100644
--- a/src/gui/components/cc_draw.cpp
+++ b/src/gui/components/cc_draw.cpp
@@ -422,7 +422,7 @@ void CCDraw::clearFbData()
 	v_fbdata.clear();
 }
 
-bool CCDraw::CheckFbData(const cc_fbdata_t& fbdata, const char* func, const int line)
+bool CCDraw::CheckFbData(const cc_fbdata_t& fbdata, const char* func, const int& line)
 {
 	if (fbdata.x < 0 || fbdata.y < 0 || fbdata.dx == 0 || fbdata.dy == 0) {
 		dprintf(DEBUG_DEBUG,"[CCDraw]\t[%s - %d], INFO! Position < 0 or dx and/or dy = 0, x = %d,  y = %d, dx = %d,  dy = %d item: %s [type: %d]\n",
@@ -483,14 +483,14 @@ cc_screen_data_t CCDraw::getScreenData(const int& ax, const int& ay, const int&
 	return res;
 }
 
-void CCDraw::enableSaveBg(bool save_bg)
+void CCDraw::enableSaveBg(const bool &save_bg)
 {
 	if (!cc_save_bg || (cc_save_bg != save_bg))
 		clearSavedScreen();
 	cc_save_bg = save_bg;
 }
 
-void CCDraw::enablePaintCache(bool enable)
+void CCDraw::enablePaintCache(const bool &enable)
 {
 	if (!cc_paint_cache || (cc_paint_cache != enable))
 		clearPaintCache();
@@ -801,7 +801,7 @@ void CCDraw::killShadow(const fb_pixel_t& bg_color, const int& corner_radius)
 	kill(bg_color, corner_radius, CC_FBDATA_TYPE_SHADOW_BOX);
 }
 
-bool CCDraw::doPaintBg(bool do_paint)
+bool CCDraw::doPaintBg(const bool &do_paint)
 {
 	if (paint_bg == do_paint)
 		return false;
diff --git a/src/gui/components/cc_draw.h b/src/gui/components/cc_draw.h
index 7c9fcad6e..05e81aa44 100644
--- a/src/gui/components/cc_draw.h
+++ b/src/gui/components/cc_draw.h
@@ -146,7 +146,7 @@ class CCDraw : public COSDFader, public CComponentsSignals, public CCTypes
 		fb_pixel_t cc_body_gradient_2nd_col, cc_body_gradient_2nd_col_old;
 
 		///check current fbdtata position and dimensions, parameter fbdata is an element of v_fbdata, returns false on error
-		bool CheckFbData(const cc_fbdata_t& fbdata, const char* func, const int line);
+		bool CheckFbData(const cc_fbdata_t& fbdata, const char* func, const int& line);
 
 		///sub: get gradient data evaluted with current parameters
 		gradientData_t* getGradientData();
@@ -257,20 +257,20 @@ class CCDraw : public COSDFader, public CComponentsSignals, public CCTypes
 		int getShadowWidth(){return shadow_w;}
 
 		///paint caching for body and shadow, see also cc_paint_cache NOTE: has no effect if paint_bg = false
-		void enablePaintCache(bool enable = true);
+		void enablePaintCache(const bool &enable = true);
 		///disable paint caching for body and shadow
 		void disablePaintCache(){enablePaintCache(false);}
 
 		///returns paint mode, true=item was painted
 		bool isPainted();
 		///allows paint of elementary item parts (shadow, frame and body), similar as background, set it usually to false, if item used in a form, returns true, if mode has changed, also cleans screnn buffer
-		bool doPaintBg(bool do_paint);
+		bool doPaintBg(const bool &do_paint);
 		///allows paint frame around body, default true , NOTE: ignored if frame width = 0
-		void enableFrame(bool enable = true, const int& frame_width = -1){cc_enable_frame = enable; setFrameThickness(frame_width == -1 ? fr_thickness : frame_width);}
+		void enableFrame(const bool &enable = true, const int& frame_width = -1){cc_enable_frame = enable; setFrameThickness(frame_width == -1 ? fr_thickness : frame_width);}
 		///disallow paint frame around body
 		void disableFrame(){enableFrame(false);}
 		///enable/disable background buffering, default action = enable, see also cc_save_bg
-		void enableSaveBg(bool save_bg = true);
+		void enableSaveBg(const bool &save_bg = true);
 		///disable background buffering, does the same like enableSaveBg(false), NOTE: cleans existant pixbuffer content!
 		void disableSaveBg(){enableSaveBg(false);}
 		///returns background buffering mode. Mode is assigned with paint() or enableSaveBg()/disableSaveBg())