diff --git a/src/servers/app/server/Painter/drawing_modes/DrawingModeAdd.h b/src/servers/app/server/Painter/drawing_modes/DrawingModeAdd.h
new file mode 100644
index 0000000000..c4aa4ca2c5
--- /dev/null
+++ b/src/servers/app/server/Painter/drawing_modes/DrawingModeAdd.h
@@ -0,0 +1,271 @@
+// DrawingModeAdd.h
+
+#ifndef DRAWING_MODE_ADD_H
+#define DRAWING_MODE_ADD_H
+
+#include <SupportDefs.h>
+
+#include "DrawingMode.h"
+#include "PatternHandler.h"
+
+namespace agg
+{
+	//====================================================DrawingModeAdd
+	template<class Order>
+	class DrawingModeAdd : public DrawingMode
+	{
+	public:
+		typedef Order order_type;
+
+		//--------------------------------------------------------------------
+		DrawingModeAdd()
+			: DrawingMode()
+		{
+		}
+
+		//--------------------------------------------------------------------
+		virtual	void blend_pixel(int x, int y, const color_type& c, int8u cover)
+		{
+//printf("DrawingModeAdd::blend_pixel()\n");
+			if (fPatternHandler->IsHighColor(x, y)) {
+				int8u* p = m_rbuf->row(y) + (x << 2);
+				rgb_color color = fPatternHandler->R5ColorAt(x, y);
+	//			int alpha = int(cover) * int(c.a);
+				int alpha = int(cover) * int(color.alpha);
+				if(alpha == 255*255)
+				{
+					p[Order::R] = min_c(255, p[Order::R] + color.red);
+					p[Order::G] = min_c(255, p[Order::G] + color.green);
+					p[Order::B] = min_c(255, p[Order::B] + color.blue);
+//					p[Order::A] = color.alpha;
+				}
+				else
+				{
+					int r = p[Order::R];
+					int g = p[Order::G];
+					int b = p[Order::B];
+					int a = p[Order::A];
+					p[Order::R] = (int8u)((((color.red - r) * alpha) + (r << 16)) >> 16);
+					p[Order::G] = (int8u)((((color.green - g) * alpha) + (g << 16)) >> 16);
+					p[Order::B] = (int8u)((((color.blue - b) * alpha) + (b << 16)) >> 16);
+					p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
+				}
+			}
+		}
+
+		//--------------------------------------------------------------------
+		virtual	void blend_hline(int x, int y, unsigned len, 
+								 const color_type& c, int8u cover)
+		{
+//printf("DrawingModeAdd::blend_hline()\n");
+			int alpha = int(cover) * int(c.a);
+			if(alpha == 255*255)
+			{
+				int32u v;
+				int8u* p8 = (int8u*)&v;
+				p8[Order::R] = (int8u)c.r;
+				p8[Order::G] = (int8u)c.g;
+				p8[Order::B] = (int8u)c.b;
+				p8[Order::A] = (int8u)c.a;
+				int32u* p32 = (int32u*)(m_rbuf->row(y)) + x;
+				do
+				{
+					if (fPatternHandler->IsHighColor(x, y))
+						*p32 = v;
+					p32++;
+					x++;
+				}
+				while(--len);
+			}
+			else
+			{
+				int8u* p = m_rbuf->row(y) + (x << 2);
+				do
+				{
+					if (fPatternHandler->IsHighColor(x, y)) {
+						int r = p[Order::R];
+						int g = p[Order::G];
+						int b = p[Order::B];
+						int a = p[Order::A];
+						p[Order::R] = (int8u)((((c.r - r) * alpha) + (r << 16)) >> 16);
+						p[Order::G] = (int8u)((((c.g - g) * alpha) + (g << 16)) >> 16);
+						p[Order::B] = (int8u)((((c.b - b) * alpha) + (b << 16)) >> 16);
+						p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
+					}
+					x++;
+					p += 4;
+				}
+				while(--len);
+			}
+		}
+
+		//--------------------------------------------------------------------
+		virtual	void blend_vline(int x, int y, unsigned len, 
+								 const color_type& c, int8u cover)
+		{
+printf("DrawingModeAdd::blend_vline()\n");
+		}
+
+		//--------------------------------------------------------------------
+		virtual	void blend_solid_hspan(int x, int y, unsigned len, 
+									   const color_type& c, const int8u* covers)
+		{
+//printf("DrawingModeAdd::blend_solid_hspan()\n");
+			int8u* p = m_rbuf->row(y) + (x << 2);
+			do 
+			{
+				if (fPatternHandler->IsHighColor(x, y)) {
+					rgb_color color = fPatternHandler->R5ColorAt(x, y);
+	//				int alpha = int(*covers++) * c.a;
+					int alpha = int(*covers) * color.alpha;
+	//int alpha = int(*covers++);
+					if(alpha)
+					{
+						if(alpha == 255*255)
+						{
+	//						p[Order::R] = (int8u)c.r;
+	//						p[Order::G] = (int8u)c.g;
+	//						p[Order::B] = (int8u)c.b;
+	//						p[Order::A] = (int8u)c.a;
+							p[Order::R] = color.red;
+							p[Order::G] = color.green;
+							p[Order::B] = color.blue;
+							p[Order::A] = color.alpha;
+						}
+						else
+						{
+							int r = p[Order::R];
+							int g = p[Order::G];
+							int b = p[Order::B];
+							int a = p[Order::A];
+	//						p[Order::R] = (int8u)((((c.r - r) * alpha) + (r << 16)) >> 16);
+	//						p[Order::G] = (int8u)((((c.g - g) * alpha) + (g << 16)) >> 16);
+	//						p[Order::B] = (int8u)((((c.b - b) * alpha) + (b << 16)) >> 16);
+	//						p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
+							p[Order::R] = (int8u)((((color.red - r) * alpha) + (r << 16)) >> 16);
+							p[Order::G] = (int8u)((((color.green - g) * alpha) + (g << 16)) >> 16);
+							p[Order::B] = (int8u)((((color.blue - b) * alpha) + (b << 16)) >> 16);
+							p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
+						}
+					}
+				}
+				covers++;
+				p += 4;
+				x++;
+			}
+			while(--len);
+		}
+
+
+
+		//--------------------------------------------------------------------
+		virtual	void blend_solid_vspan(int x, int y, unsigned len, 
+									   const color_type& c, const int8u* covers)
+		{
+//printf("DrawingModeAdd::blend_solid_vspan()\n");
+			int8u* p = m_rbuf->row(y) + (x << 2);
+			do 
+			{
+				if (fPatternHandler->IsHighColor(x, y)) {
+					rgb_color color = fPatternHandler->R5ColorAt(x, y);
+	//				int alpha = int(*covers++) * c.a;
+					int alpha = int(*covers) * color.alpha;
+	//int alpha = int(*covers++);
+	
+					if(alpha)
+					{
+						if(alpha == 255*255)
+						{
+	//						p[Order::R] = (int8u)c.r;
+	//						p[Order::G] = (int8u)c.g;
+	//						p[Order::B] = (int8u)c.b;
+	//						p[Order::A] = (int8u)c.a;
+							p[Order::R] = color.red;
+							p[Order::G] = color.green;
+							p[Order::B] = color.blue;
+							p[Order::A] = color.alpha;
+						}
+						else
+						{
+							int r = p[Order::R];
+							int g = p[Order::G];
+							int b = p[Order::B];
+							int a = p[Order::A];
+	//						p[Order::R] = (int8u)((((c.r - r) * alpha) + (r << 16)) >> 16);
+	//						p[Order::G] = (int8u)((((c.g - g) * alpha) + (g << 16)) >> 16);
+	//						p[Order::B] = (int8u)((((c.b - b) * alpha) + (b << 16)) >> 16);
+	//						p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
+							p[Order::R] = (int8u)((((color.red - r) * alpha) + (r << 16)) >> 16);
+							p[Order::G] = (int8u)((((color.green - g) * alpha) + (g << 16)) >> 16);
+							p[Order::B] = (int8u)((((color.blue - b) * alpha) + (b << 16)) >> 16);
+							p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
+						}
+					}
+				};
+				covers++;
+				p += m_rbuf->stride();
+				y++;
+			}
+			while(--len);
+		}
+
+
+		//--------------------------------------------------------------------
+		virtual	void blend_color_hspan(int x, int y, unsigned len, 
+									   const color_type* colors, 
+									   const int8u* covers,
+									   int8u cover)
+		{
+//printf("DrawingModeAdd::blend_color_hspan()\n");
+			int8u* p = m_rbuf->row(y) + (x << 2);
+			do 
+			{
+				int alpha = colors->a * (covers ? int(*covers++) : int(cover));
+
+				if(alpha)
+				{
+					if(alpha == 255*255)
+					{
+						p[Order::R] = min_c(255, (int8u)colors->r + p[Order::R]);
+						p[Order::G] = min_c(255, (int8u)colors->g + p[Order::G]);
+						p[Order::B] = min_c(255, (int8u)colors->b + p[Order::B]);
+//						p[Order::A] = min_c(255, (int8u)colors->a + p[Order::R]);
+					}
+					else
+					{
+						int r = p[Order::R];
+						int g = p[Order::G];
+						int b = p[Order::B];
+						int a = p[Order::A];
+						p[Order::R] = (int8u)((((min_c(255, r + colors->r) - r) * alpha) + (r << 16)) >> 16);
+						p[Order::G] = (int8u)((((min_c(255, g + colors->g) - g) * alpha) + (g << 16)) >> 16);
+						p[Order::B] = (int8u)((((min_c(255, b + colors->b) - b) * alpha) + (b << 16)) >> 16);
+						p[Order::A] = (int8u)(((alpha + (a << 8)) - ((alpha * a) >> 8)) >> 8);
+					}
+				}
+				p += 4;
+				++colors;
+			}
+			while(--len);
+		}
+
+
+		//--------------------------------------------------------------------
+		virtual	void blend_color_vspan(int x, int y, unsigned len, 
+									   const color_type* colors, 
+									   const int8u* covers,
+									   int8u cover)
+		{
+printf("DrawingModeAdd::blend_color_vspan()\n");
+		}
+
+	};
+
+	typedef DrawingModeAdd<order_rgba32> DrawingModeRGBA32Add; //----DrawingModeRGBA32Over
+	typedef DrawingModeAdd<order_argb32> DrawingModeARGB32Add; //----DrawingModeARGB32Over
+	typedef DrawingModeAdd<order_abgr32> DrawingModeABGR32Add; //----DrawingModeABGR32Over
+	typedef DrawingModeAdd<order_bgra32> DrawingModeBGRA32Add; //----DrawingModeBGRA32Over
+}
+
+#endif // DRAWING_MODE_ADD_H
+
diff --git a/src/servers/app/server/Painter/drawing_modes/DrawingModeFactory.cpp b/src/servers/app/server/Painter/drawing_modes/DrawingModeFactory.cpp
index 54de17a21b..37a895ef7a 100644
--- a/src/servers/app/server/Painter/drawing_modes/DrawingModeFactory.cpp
+++ b/src/servers/app/server/Painter/drawing_modes/DrawingModeFactory.cpp
@@ -1,6 +1,7 @@
 // DrawingModeFactory.h
 
 
+#include "DrawingModeAdd.h"
 #include "DrawingModeCopy.h"
 #include "DrawingModeInvert.h"
 #include "DrawingModeOver.h"
@@ -21,6 +22,9 @@ DrawingModeFactory::DrawingModeFor(drawing_mode mode)
 		case B_OP_OVER:
 			return new agg::DrawingModeBGRA32Over();
 			break;
+		case B_OP_ADD:
+			return new agg::DrawingModeBGRA32Add();
+			break;
 
 		default:
 			return new agg::DrawingModeBGRA32Copy();