add stylus jitter on/off hotkey (default:on)

because the jitter hack can be annoying when TASing.

desmume/src/MMU.cpp

@@ -4009,8 +4009,11 @@ void FASTCALL _MMU_ARM7_write16(u32 adr, u16 val)
 										if(nds.adc_jitterctr == 25)
 										{
 											nds.adc_jitterctr = 0;
-											nds.adc_touchY ^= 16;
-											nds.adc_touchX ^= 16;
+											if (nds.stylusJitter)
+											{
+												nds.adc_touchY ^= 16;
+												nds.adc_touchX ^= 16;
+											}
 										}
 										if(MMU.SPI_CNT&(1<<11))
 										{

desmume/src/NDSSystem.cpp

@@ -2522,6 +2522,7 @@ void NDS_Reset()
 	nds.ConsoleType = CommonSettings.ConsoleType;
 	nds._DebugConsole = CommonSettings.DebugConsole;
 	nds.ensataEmulation = CommonSettings.EnsataEmulation;
+	nds.stylusJitter = CommonSettings.StylusJitter;
 	nds.ensataHandshake = ENSATA_HANDSHAKE_none;
 	nds.ensataIpcSyncCounter = 0;
 	SetupMMU(nds.Is_DebugConsole(),nds.Is_DSI());

desmume/src/NDSSystem.h

@@ -177,6 +177,7 @@ struct NDSSystem
 	u16 adc_touchX;
 	u16 adc_touchY;
 	s32 adc_jitterctr;
+	BOOL stylusJitter;
 
 	//the DSI returns calibrated touch coords from its TSC (?), so we need to save these separately
 	u16 scr_touchX;
@@ -507,6 +508,7 @@ extern struct TCommonSettings {
 		, spu_advanced(false)
 		, StylusPressure(50)
 		, ConsoleType(NDS_CONSOLE_TYPE_FAT)
+		, StylusJitter(true)
 	{
 		strcpy(ARM9BIOS, "biosnds9.bin");
 		strcpy(ARM7BIOS, "biosnds7.bin");
@@ -558,6 +560,7 @@ extern struct TCommonSettings {
 	bool rigorous_timing;
 
 	int StylusPressure;
+	bool StylusJitter;
 
 	bool dispLayers[2][5];
 	

desmume/src/windows/hotkey.cpp

@@ -464,6 +464,12 @@ void HK_DecreasePressure(int, bool justPressed) {
 	if(CommonSettings.StylusPressure<0) CommonSettings.StylusPressure = 0;
 	osd->addLine("Stylus Pressure to %d%%",CommonSettings.StylusPressure);
 }
+void HK_ToggleStylusJitter(int, bool justPressed) {
+	CommonSettings.StylusJitter = !CommonSettings.StylusJitter;
+	nds.stylusJitter = CommonSettings.StylusJitter;
+	WritePrivateProfileBool("Emulation", "StylusJitter", CommonSettings.StylusJitter, IniName);
+	osd->addLine("Stylus Jitter %s",CommonSettings.StylusJitter ? "On" : "Off");
+}
 
 void HK_Rotate0(int, bool justPressed) { SetRotate(MainWindow->getHWnd(), 0);}
 void HK_Rotate90(int, bool justPressed) { SetRotate(MainWindow->getHWnd(), 90);}
@@ -579,6 +585,12 @@ void InitCustomKeys (SCustomKeys *keys)
 	keys->DecreasePressure.key = VK_OEM_MINUS;
 	keys->DecreasePressure.modifiers = CUSTKEY_SHIFT_MASK;
 	
+	keys->ToggleStylusJitter.handleKeyDown = HK_ToggleStylusJitter;
+	keys->ToggleStylusJitter.code = "ToggleStylusJitter";
+	keys->ToggleStylusJitter.name = STRW(ID_LABEL_HK61);
+	keys->ToggleStylusJitter.page = HOTKEY_PAGE_MAIN;
+	keys->ToggleStylusJitter.key = NULL;
+	
 	keys->Microphone.handleKeyDown = HK_MicrophoneKeyDown;
 	keys->Microphone.handleKeyUp = HK_MicrophoneKeyUp;
 	keys->Microphone.code = "Microphone";

desmume/src/windows/hotkey.h

@@ -71,7 +71,7 @@ struct SCustomKeys
 	
 	SCustomKey Rotate0, Rotate90, Rotate180, Rotate270;
 
-	SCustomKey OpenROM, ReloadROM, Reset, Pause, CpuMode, FrameAdvance, FastForward, FastForwardToggle, IncreaseSpeed, DecreaseSpeed, FrameLimitToggle, Microphone, IncreasePressure, DecreasePressure;
+	SCustomKey OpenROM, ReloadROM, Reset, Pause, CpuMode, FrameAdvance, FastForward, FastForwardToggle, IncreaseSpeed, DecreaseSpeed, FrameLimitToggle, Microphone, IncreasePressure, DecreasePressure, ToggleStylusJitter;
 
 	SCustomKey PlayMovie, RecordMovie, StopMovie, ToggleReadOnly;
 	

desmume/src/windows/resource.h

@@ -805,6 +805,7 @@
 #define ID_LABEL_HK58                   4523
 #define ID_LABEL_HK59                   4524
 #define ID_LABEL_HK60                   4525
+#define ID_LABEL_HK61                   4526
 #define IDD_MICROPHONE                  5000
 #define IDM_MICROPHONESETTINGS          5001
 #define IDC_MICSAMPLEBROWSE             5003