From e0d88d435f780ca74ab8bde26517efd6180dcbab Mon Sep 17 00:00:00 2001
From: "CRINKLE-PC\\sloan" <sloan@lanimals.com>
Date: Fri, 31 Aug 2018 19:59:09 -0700
Subject: [PATCH] Swap joypads over Netplay

Someone smarter than me can probably figure out a more "proper" way to do this, but I hate RetroArch and wanted an easy way to Swap P1 and P2 without both players having to press the button at the same time.
---
 controls.cpp          |  9 +++++++++
 netplay.cpp           |  9 ++++++++-
 netplay.h             |  3 +++
 server.cpp            | 14 ++++++++++++++
 win32/snes9xw.vcxproj |  1 +
 5 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/controls.cpp b/controls.cpp
index 975c499a..bddac2e0 100644
--- a/controls.cpp
+++ b/controls.cpp
@@ -2628,6 +2628,15 @@ void S9xApplyCommand (s9xcommand_t cmd, int16 data1, int16 data2)
 							S9xSetInfoString("Cannot swap pads: port 2 is not a joypad");
 							break;
 						}
+						
+						if (Settings.NetPlay && data2 != 1) { //data2 == 1 means it's sent by the netplay code
+							if (Settings.NetPlayServer) {
+								S9xNPSendJoypadSwap();
+							} else {
+								S9xSetInfoString("Netplay Client cannot swap pads.");
+								break;
+							}
+						}
 
 						newcontrollers[1] = curcontrollers[0];
 						newcontrollers[0] = curcontrollers[1];
diff --git a/netplay.cpp b/netplay.cpp
index 56635058..c0e4fa0b 100644
--- a/netplay.cpp
+++ b/netplay.cpp
@@ -204,6 +204,7 @@
 #include <sys/types.h>
 
 #include "snes9x.h"
+#include "controls.h"
 
 #ifdef __WIN32__
 	#include <winsock.h>
@@ -684,7 +685,13 @@ bool8 S9xNPWaitForHeartBeat ()
 				else
 					S9xNPSetWarning("CLIENT: Server has resumed.");
                 break;
-            case NP_SERV_LOAD_ROM:
+		case NP_SERV_JOYPAD_SWAP:
+#ifdef NP_DEBUG
+			printf("CLIENT: Joypad Swap received @%ld\n", S9xGetMilliTime() - START);
+#endif
+			S9xApplyCommand(S9xGetCommandT("SwapJoypads"), 1, 1);
+			break;
+        case NP_SERV_LOAD_ROM:
 #ifdef NP_DEBUG
                 printf ("CLIENT: LOAD_ROM received @%ld\n", S9xGetMilliTime () - START);
 #endif
diff --git a/netplay.h b/netplay.h
index d8e81454..afbcc889 100644
--- a/netplay.h
+++ b/netplay.h
@@ -241,6 +241,8 @@
 #define NP_SERV_FREEZE_FILE 6
 #define NP_SERV_SRAM_DATA 7
 #define NP_SERV_READY 8
+// ...
+#define NP_SERV_JOYPAD_SWAP 12
 
 struct SNPClient
 {
@@ -382,6 +384,7 @@ void S9xNPServerAddTask (uint32 task, void *data);
 
 bool8 S9xNPStartServer (int port);
 void S9xNPStopServer ();
+void S9xNPSendJoypadSwap ();
 #ifdef __WIN32__
 #define S9xGetMilliTime timeGetTime
 #else
diff --git a/server.cpp b/server.cpp
index 5fc60e11..1497eb9c 100644
--- a/server.cpp
+++ b/server.cpp
@@ -869,6 +869,20 @@ void S9xNPSendServerPause (bool8 paused)
     S9xNPSendToAllClients (pause, 7);
 }
 
+void S9xNPSendJoypadSwap()
+{
+#ifdef NP_DEBUG
+	printf("SERVER: Swap Joypads - @%ld\n", S9xGetMilliTime() - START);
+#endif
+	uint8 swap[7];
+	uint8 *ptr = swap;
+	*ptr++ = NP_SERV_MAGIC;
+	*ptr++ = 0;
+	*ptr++ = NP_SERV_JOYPAD_SWAP;
+	WRITE_LONG(ptr, 7);
+	S9xNPSendToAllClients(swap, 7);
+}
+
 void S9xNPServerLoop (void *)
 {
 #ifdef __WIN32__
diff --git a/win32/snes9xw.vcxproj b/win32/snes9xw.vcxproj
index b71eb392..802a9d8c 100644
--- a/win32/snes9xw.vcxproj
+++ b/win32/snes9xw.vcxproj
@@ -92,6 +92,7 @@
     <IntDir>$(SolutionDir)_Intermediate\$(ProjectName)\$(Configuration)\$(PlatformTarget)\</IntDir>
     <TargetName>$(ProjectName)</TargetName>
     <IncludePath>$(DXSDK_DIR)include;$(CG_INC_PATH);$(IncludePath)</IncludePath>
+    <IncludePath>$(DXSDK_DIR)include;$(CG_INC_PATH);$(IncludePath);$(DXSDK_DIR)\include</IncludePath>
     <LibraryPath>$(DXSDK_DIR)Lib\$(PlatformTarget);$(CG_LIB_PATH);$(LibraryPath)</LibraryPath>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release Unicode|x64'">