Add lag frame count display, instead of "ignored" sign.

Adjust reset timing:
- move IPPU.TotalEmulatedFrames initialization from InitROM to S9xResetPPU (part of S9xReset)
- reset pad_read in S9xResetPPU (it must be reset at the beginning of emulation including movie playing/recording, otherwise the lag frame count can show a different value, because of the first frame.)

controls.cpp

@@ -3321,6 +3321,9 @@ void S9xControlEOF (void)
 
 	S9xMovieUpdate();
 
+	if(!pad_read)
+		IPPU.PadIgnoredFrames++;
+
 	pad_read_last = pad_read;
 	pad_read      = false;
 }

memmap.cpp

@@ -2695,8 +2695,6 @@ void CMemory::InitROM (void)
 	Timings.NMIDMADelay  = 24;
 	Timings.IRQPendCount = 0;
 
-	IPPU.TotalEmulatedFrames = 0;
-
 	//// Hack games
 
 	ApplyROMFixes();

movie.cpp

@@ -1209,4 +1209,11 @@ void S9xUpdateFrameCounter (int offset)
 		double second = fmod(totalseconds, 60.0);
 		sprintf(GFX.FrameDisplayString, "Frame: %d (%d:%02d:%05.2f)", frame, hour, minute, second);
 	}
+
+	if (Settings.DisplayLagFrame)
+	{
+		char LagFrameDisplayString[64];
+		sprintf(LagFrameDisplayString, " | %d", IPPU.PadIgnoredFrames);
+		strcat(GFX.FrameDisplayString, LagFrameDisplayString);
+	}
 }

ppu.cpp

@@ -1812,6 +1812,11 @@ void S9xResetPPU (void)
 	PPU.M7HOFS = 0;
 	PPU.M7VOFS = 0;
 	PPU.M7byte = 0;
+
+	IPPU.TotalEmulatedFrames = 0;
+	IPPU.PadIgnoredFrames = 0;
+	extern bool8 pad_read, pad_read_last;
+	pad_read = pad_read_last = FALSE;
 }
 
 void S9xSoftResetPPU (void)

ppu.h

@@ -237,6 +237,7 @@ struct InternalPPU
 	uint32	TotalEmulatedFrames;
 	uint32	SkippedFrames;
 	uint32	FrameSkip;
+	uint32	PadIgnoredFrames;
 };
 
 struct SOBJ

snes9x.cpp

@@ -416,6 +416,7 @@ void S9xLoadConfigFiles (char **argv, int argc)
 	Settings.DisplayWatchedAddresses    =  conf.GetBool("Display::DisplayWatchedAddresses",    false);
 	Settings.DisplayPressedKeys         =  conf.GetBool("Display::DisplayInput",               false);
 	Settings.DisplayMovieFrame          =  conf.GetBool("Display::DisplayFrameCount",          false);
+	Settings.DisplayLagFrame            =  conf.GetBool("Display::DisplayLagFrameCount",       false);
 	Settings.AutoDisplayMessages        =  conf.GetBool("Display::MessagesInImage",            true);
 	Settings.InitialInfoStringTimeout   =  conf.GetInt ("Display::MessageDisplayTime",         120);
 

snes9x.h

@@ -402,6 +402,7 @@ struct SSettings
 	bool8	DisplayWatchedAddresses;
 	bool8	DisplayPressedKeys;
 	bool8	DisplayMovieFrame;
+	bool8	DisplayLagFrame;
 	bool8	AutoDisplayMessages;
 	uint32	InitialInfoStringTimeout;
 	uint16	DisplayColor;

win32/wconfig.cpp

@@ -860,6 +860,7 @@ void WinRegisterConfigItems()
 	AddBool2C("FrameRate", Settings.DisplayFrameRate, false, "on to display the framerate (will be inaccurate if AutoMaxSkipFrames is too small)");
 	AddBoolC("DisplayInput", Settings.DisplayPressedKeys, false, "true to show which buttons are pressed");
 	AddBoolC("DisplayFrameCount", Settings.DisplayMovieFrame, true, "true to show the frame count when a movie is playing");
+	AddBoolC("DisplayLagFrameCount", Settings.DisplayLagFrame, true, "true to show the lag frame count");
 #undef CATEGORY
 #define CATEGORY "Display\\Win"
 	AddUIntC("OutputMethod", GUI.outputMethod, 1, "0=DirectDraw, 1=Direct3D, 2=OpenGL");