Could you use these things to print like, boobs?

BizHawk.Emulation.Cores/Consoles/Nintendo/Gameboy/LibSameboy.cs

@@ -31,6 +31,13 @@ namespace BizHawk.Emulation.Cores.Consoles.Nintendo.Gameboy
 			public Buttons Keys;
 		}
 
+		[UnmanagedFunctionPointer(CC)]
+		public delegate void PrinterCallback(IntPtr image,
+										  byte height,
+										  byte top_margin,
+										  byte bottom_margin,
+										  byte exposure);
+
 		[BizImport(CC)]
 		public abstract bool Init(bool cgb, byte[] spc, int spclen);
 
@@ -51,5 +58,8 @@ namespace BizHawk.Emulation.Cores.Consoles.Nintendo.Gameboy
 
 		[BizImport(CC)]
 		public abstract bool HasSaveRam();
+
+		[BizImport(CC)]
+		public abstract void SetPrinterCallback(PrinterCallback callback);
 	}
 }

waterbox/sameboy/bizhawk.cpp

@@ -64,6 +64,24 @@ static void InputCallback(GB_gameboy_t *gb)
 	FrontendInputCallback();
 }
 
+typedef void (*FrontendPrinterCallback_t)(uint32_t *image,
+										  uint8_t height,
+										  uint8_t top_margin,
+										  uint8_t bottom_margin,
+										  uint8_t exposure);
+
+static FrontendPrinterCallback_t FrontendPrinterCallback;
+
+static void PrinterCallback(GB_gameboy_t *gb,
+							uint32_t *image,
+							uint8_t height,
+							uint8_t top_margin,
+							uint8_t bottom_margin,
+							uint8_t exposure)
+{
+	FrontendPrinterCallback(image, height, top_margin, bottom_margin, exposure);
+}
+
 static blip_t *leftblip;
 static blip_t *rightblip;
 const int SOUND_RATE_GB = 2097152;
@@ -245,6 +263,22 @@ ECL_EXPORT bool HasSaveRam()
 	return true;
 }
 
+ECL_EXPORT void SetPrinterCallback(FrontendPrinterCallback_t callback)
+{
+	FrontendPrinterCallback = callback;
+
+	if (callback)
+	{
+		GB_connect_printer(&GB, PrinterCallback);
+	}
+	else
+	{
+		GB_set_serial_transfer_start_callback(&GB, NULL);
+		GB_set_serial_transfer_end_callback(&GB, NULL);
+		GB.printer.callback = NULL;
+	}
+}
+
 int main()
 {
 	return 0;