This commit addresses the Hyrule field slowdown issue in Zelda: Twilight Princess, as discussed in Xtreme2damax's thread: http://forums.dolphin-emu.com/thread-10638.html. It can be activated in the DX9, DX11, and OpenGL plugin GUI's. Enabling the hack while playing other games besides ZTP will likely have either an undesirable or no(more likely) effect.

The code changes disable the usual pipeline flush for certain BP Writes that occur while the minimap is being drawn in Zelda: twilight princess. This significantly increases speed while in hyrule field. The way this is accomplished is described more in depth on page 42 of Xtreme's thread. Big thanks to Xtreme for doing a great job hosting that thread, and Kiesel-stein for initial work on the hack

Also, I used the resource editor in Visual studio to generate the GUI code for the DX11 plugin, and some code appeared to be removed, although the behavior of the GUI did not seem to change. Hopefully someone more experienced with resource files (forms?) can double check that no code was damaged


git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6057 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/VideoCommon/Src/BPStructs.cpp

@@ -34,10 +34,18 @@
 
 using namespace BPFunctions;
 
+u32 mapTexAddress;
+bool mapTexFound;
+int numWrites;
+
 void BPInit()
 {
 	memset(&bpmem, 0, sizeof(bpmem));
 	bpmem.bpMask = 0xFFFFFF;
+
+   mapTexAddress = 0;
+   numWrites = 0;
+   mapTexFound = false;
 }
 
 void RenderToXFB(const BPCmd &bp, const EFBRectangle &rc, float yScale, float xfbLines, u32 xfbAddr, const u32 dstWidth, const u32 dstHeight)
@@ -83,7 +91,40 @@ void BPWritten(const BPCmd& bp)
 	// FIXME: Hangs load-state, but should fix graphic-heavy games state loading
 	//s_bpCritical.Enter();
 
+   //BEGIN ZTP SPEEDUP HACK CHANGES
+   //This hunk of code disables the usual pipeline flush for certain BP Writes
+   //that occur while the minimap is being drawn in Zelda: twilight princess.
+   //This significantly increases speed while in hyrule field. In depth discussion
+   //on how this Hack came to be can be found at:http://forums.dolphin-emu.com/thread-10638.html
+   //-fircrestsk8
+   if (g_ActiveConfig.bZTPSpeedHack)
+   {
+      if (!mapTexFound)
+      {
+         if (bp.address == BPMEM_TEV_COLOR_ENV || bp.address == BPMEM_TEV_ALPHA_ENV)
+         {
+            numWrites++;
+            if (numWrites >= 100) //seem that if 100 consecutive BP writes are called to either of these addresses in ZTP, 
+            {                      //then it is safe to assume the map texture address is currently loaded into the BP memory
+               mapTexAddress = (bpmem.tex[0].texImage3[0].hex << 5);
+               mapTexFound = true;
+               WARN_LOG(VIDEO, "\nZTP map texture found at address %08x\n", mapTexAddress);
+            }
+         }
+         else
+            numWrites = 0;
          FlushPipeline();
+      }
+      else
+      {
+         if ( ((bpmem.tex[0].texImage3[0].hex << 5) != mapTexAddress) || !(bpmem.tevorders[0].getEnable(0))  || bp.address == BPMEM_TREF )
+	         FlushPipeline();
+      }
+   }
+   else
+      FlushPipeline();
+   //END ZTP SPEEDUP HACK CHANGES
+
 	((u32*)&bpmem)[bp.address] = bp.newvalue;
 	
 	switch (bp.address)

Source/Core/VideoCommon/Src/VideoConfig.cpp

@@ -96,6 +96,7 @@ void VideoConfig::Load(const char *ini_file)
 	iniFile.Get("Hacks", "EFBScaledCopy", &bCopyEFBScaled, true);
 	iniFile.Get("Hacks", "FIFOWatermarkTightness", &iFIFOWatermarkTightness, 50);
 	iniFile.Get("Hacks", "ProjectionHack", &iPhackvalue, 0);
+   iniFile.Get("Hacks", "ZTPSpeedHack", &bZTPSpeedHack, false);
 
 	iniFile.Get("Hardware", "Adapter", &iAdapter, 0);
 	if (iAdapter == -1)
@@ -201,6 +202,7 @@ void VideoConfig::Save(const char *ini_file)
 	iniFile.Set("Hacks", "EFBToTextureEnable", bCopyEFBToTexture);	
 	iniFile.Set("Hacks", "EFBScaledCopy", bCopyEFBScaled);
 	iniFile.Set("Hacks", "ProjectionHack", iPhackvalue);
+   iniFile.Set("Hacks", "ZTPSpeedHack", bZTPSpeedHack);
 	
 	iniFile.Set("Hardware", "Adapter", iAdapter);
 	

Source/Core/VideoCommon/Src/VideoConfig.h

@@ -125,6 +125,7 @@ struct VideoConfig
 	float fhackvalue1, fhackvalue2;
 	bool bProjHack1;
 	float fAspectRatioHackW, fAspectRatioHackH;
+   bool bZTPSpeedHack;
 
 	int iLog; // CONF_ bits
 	int iSaveTargetId;

Source/Plugins/Plugin_VideoDX11/Src/DlgSettings.cpp

@@ -182,6 +182,7 @@ struct TabAdvanced : public W32Util::Tab
 		Button_SetCheck(GetDlgItem(hDlg, IDC_WIREFRAME), g_Config.bWireFrame);
 		Button_SetCheck(GetDlgItem(hDlg, IDC_DISABLEFOG), g_Config.bDisableFog);
 		Button_SetCheck(GetDlgItem(hDlg, IDC_ENABLEEFBCOPY), !g_Config.bEFBCopyDisable);
+      Button_SetCheck(GetDlgItem(hDlg, IDC_ZTPSPEEDUP), g_Config.bZTPSpeedHack);
 
 		Button_SetCheck(GetDlgItem(hDlg, IDC_TEXFMT_OVERLAY), g_Config.bTexFmtOverlayEnable);
 		Button_SetCheck(GetDlgItem(hDlg, IDC_TEXFMT_CENTER),  g_Config.bTexFmtOverlayCenter);
@@ -226,6 +227,7 @@ struct TabAdvanced : public W32Util::Tab
 		g_Config.bDumpFrames = false;
 		g_Config.bShowShaderErrors = true;
 		g_Config.bUseNativeMips = true;
+      g_Config.bZTPSpeedHack = Button_GetCheck(GetDlgItem(hDlg, IDC_ZTPSPEEDUP)) ? true : false;
 
 		g_Config.iMaxAnisotropy = Button_GetCheck(GetDlgItem(hDlg, IDC_FORCEANISOTROPY)) ? 16 : 1;
 		g_Config.bForceFiltering = false;

Source/Plugins/Plugin_VideoDX11/Src/resource.h

@@ -6,8 +6,6 @@
 #define IDD_SETTINGS                    103
 #define IDD_ADVANCED                    105
 #define IDC_ADAPTER                     1001
-//#define IDC_ANTIALIASMODE               1002
-//#define IDC_RESOLUTION                  1003
 #define IDC_VSYNC                       1006
 #define IDC_ASPECT_16_9                 1008
 #define IDC_ASPECT_4_3                  1009
@@ -20,15 +18,10 @@
 #define IDC_OVERLAYSTATS                1016
 #define IDC_OVERLAYPROJSTATS            1017
 #define IDC_ENABLEEFBCOPY               1018
-//#define IDC_EFBTORAM                    1019
-//#define IDC_EFBTOTEX                    1020
 #define IDC_TEXFMT_OVERLAY              1024
 #define IDC_TEXFMT_CENTER               1025
 #define IDC_ENABLEXFB                   1026
 #define IDC_FORCEANISOTROPY             1027
-//#define IDC_ENABLEXFB2                  1027
-//#define IDC_ENABLEREALXFB               1027
-//#define IDC_LOADHIRESTEXTURE            1028
 #define IDC_EFBSCALEDCOPY               1029
 #define IDC_OSDHOTKEY                   1030
 #define IDC_COMBO2                      1040
@@ -37,7 +30,7 @@
 #define IDC_SAFE_TEXTURE_CACHE_NORMAL   1042
 #define IDC_RADIO3                      1043
 #define IDC_SAFE_TEXTURE_CACHE_FAST     1043
-//#define IDC_DISABLEMIPS                 1100
+#define IDC_ZTPSPEEDUP                  1050
 #define IDC_STATIC                      -1
 
 // Next default values for new objects
@@ -46,7 +39,7 @@
 #ifndef APSTUDIO_READONLY_SYMBOLS
 #define _APS_NEXT_RESOURCE_VALUE        106
 #define _APS_NEXT_COMMAND_VALUE         40001
-#define _APS_NEXT_CONTROL_VALUE         1044
+#define _APS_NEXT_CONTROL_VALUE         1045
-#define _APS_NEXT_SYMED_VALUE           101
+#define _APS_NEXT_SYMED_VALUE           102
 #endif
 #endif

Source/Plugins/Plugin_VideoDX11/Src/resource.rc

@@ -46,7 +46,8 @@ BEGIN
     LTEXT           "&Aspect Ratio:",IDC_STATIC,9,40,48,8
     COMBOBOX        IDC_ASPECTRATIO,60,38,89,57,CBS_DROPDOWNLIST | CBS_SORT | WS_VSCROLL | WS_TABSTOP
     CONTROL         "&Enable CPU->EFB access ",IDC_EFB_ACCESS_ENABLE,"Button",BS_AUTOCHECKBOX | BS_MULTILINE | WS_TABSTOP,7,60,94,11
-    CONTROL         "Enable &Safe Texture Cache",IDC_SAFE_TEXTURE_CACHE,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,74,108,11
+    CONTROL         "Enable &Safe Texture Cache",IDC_SAFE_TEXTURE_CACHE,
+                    "Button",BS_AUTOCHECKBOX | WS_TABSTOP,7,74,108,11
     CONTROL         "Safe",IDC_SAFE_TEXTURE_CACHE_SAFE,"Button",BS_AUTORADIOBUTTON,20,87,32,10
     CONTROL         "Normal",IDC_SAFE_TEXTURE_CACHE_NORMAL,"Button",BS_AUTORADIOBUTTON,52,87,40,10
     CONTROL         "Fast",IDC_SAFE_TEXTURE_CACHE_FAST,"Button",BS_AUTORADIOBUTTON,92,87,32,10
@@ -56,76 +57,22 @@ IDD_ADVANCED DIALOGEX 0, 0, 244, 200
 STYLE DS_SETFONT | DS_FIXEDSYS | WS_CHILD | WS_BORDER | WS_SYSMENU
 FONT 8, "MS Shell Dlg", 0, 0, 0x0
 BEGIN
-    GROUPBOX        "&Settings",IDC_STATIC,6,7,228,74
+    GROUPBOX        "&Settings",IDC_STATIC,6,7,228,84
     CONTROL         "Overlay FPS counter",IDC_OVERLAYFPS,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,114,18,82,8
     CONTROL         "Disable Fog",IDC_DISABLEFOG,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,14,18,78,8
     CONTROL         "Enable Hotkey",IDC_OSDHOTKEY,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,114,33,87,8
     CONTROL         "Enable EFB copy",IDC_ENABLEEFBCOPY,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,14,33,81,8
     CONTROL         "EFB Scaled Copy",IDC_EFBSCALEDCOPY,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,14,48,64,8
     CONTROL         "Enable &Wireframe",IDC_WIREFRAME,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,114,48,87,8
-    CONTROL         "Enable 16x &anisotropy filtering",IDC_FORCEANISOTROPY,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,14,63,110,8
+    CONTROL         "Enable 16x &anisotropy filtering",IDC_FORCEANISOTROPY,
-
+                    "Button",BS_AUTOCHECKBOX | WS_TABSTOP,14,63,110,8
     GROUPBOX        "Debugging Tools",IDC_STATIC,7,148,228,46
     CONTROL         "&Overlay some statistics",IDC_OVERLAYSTATS,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,14,159,90,8
     CONTROL         "Enable TexFmt Overlay",IDC_TEXFMT_OVERLAY,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,14,174,92,10
     CONTROL         "Centered",IDC_TEXFMT_CENTER,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,114,174,52,10
+    CONTROL         "ZTP Speed-up Hack",IDC_ZTPSPEEDUP,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,14,76,78,10
 END
 
-/////////////////////////////////////////////////////////////////////////////
-//
-// DESIGNINFO
-//
-
-#ifdef APSTUDIO_INVOKED
-GUIDELINES DESIGNINFO 
-BEGIN
-    IDD_ABOUT, DIALOG
-    BEGIN
-        LEFTMARGIN, 7
-        RIGHTMARGIN, 181
-        TOPMARGIN, 7
-        BOTTOMMARGIN, 74
-    END
-
-    IDD_SETTINGS, DIALOG
-    BEGIN
-        LEFTMARGIN, 7
-        RIGHTMARGIN, 237
-        VERTGUIDE, 7
-        VERTGUIDE, 68
-        VERTGUIDE, 81
-        VERTGUIDE, 87
-        TOPMARGIN, 7
-        BOTTOMMARGIN, 176
-    END
-
-    IDD_ADVANCED, DIALOG
-    BEGIN
-        LEFTMARGIN, 7
-        RIGHTMARGIN, 237
-        VERTGUIDE, 14
-        VERTGUIDE, 29
-        VERTGUIDE, 114
-        TOPMARGIN, 7
-        BOTTOMMARGIN, 195
-        HORZGUIDE, 18
-        HORZGUIDE, 33
-        HORZGUIDE, 49
-        HORZGUIDE, 156
-    END
-
-    IDD_ENHANCEMENTS, DIALOG
-    BEGIN
-        LEFTMARGIN, 7
-        RIGHTMARGIN, 217
-        VERTGUIDE, 16
-        VERTGUIDE, 74
-        TOPMARGIN, 7
-        BOTTOMMARGIN, 168
-    END
-END
-#endif    // APSTUDIO_INVOKED
-
 
 #ifdef APSTUDIO_INVOKED
 /////////////////////////////////////////////////////////////////////////////

Source/Plugins/Plugin_VideoDX9/Src/DlgSettings.cpp

@@ -54,6 +54,7 @@ BEGIN_EVENT_TABLE(GFXConfigDialogDX,wxDialog)
 	EVT_CHECKBOX(ID_FORCEANISOTROPY, GFXConfigDialogDX::EnhancementsSettingsChanged)
 	EVT_CHECKBOX(ID_LOADHIRESTEXTURES, GFXConfigDialogDX::EnhancementsSettingsChanged)
 	EVT_CHECKBOX(ID_EFBSCALEDCOPY, GFXConfigDialogDX::EnhancementsSettingsChanged)
+   EVT_CHECKBOX(ID_ZTPSPEEDHACK, GFXConfigDialogDX::EnhancementsSettingsChanged)
 
 	//Advanced Tab
 	EVT_CHECKBOX(ID_DISABLEFOG, GFXConfigDialogDX::AdvancedSettingsChanged)
@@ -131,6 +132,7 @@ void GFXConfigDialogDX::InitializeGUIValues()
 	m_HiresTextures->SetValue(g_Config.bHiresTextures);
 	m_MSAAModeCB->SetSelection(g_Config.iMultisampleMode);
 	m_EFBScaledCopy->SetValue(g_Config.bCopyEFBScaled);
+   m_ZTPSpeedHack->SetValue(g_Config.bZTPSpeedHack);
 
 	//Advance
 	m_DisableFog->SetValue(g_Config.bDisableFog);
@@ -265,6 +267,10 @@ void GFXConfigDialogDX::CreateGUIControls()
 	sbEFBHacks = new wxStaticBoxSizer( new wxStaticBox( m_PageEnhancements, wxID_ANY, wxT("EFB hacks") ), wxVERTICAL );
 	m_EFBScaledCopy = new wxCheckBox( m_PageEnhancements, ID_EFBSCALEDCOPY, wxT("EFB scaled copy"), wxDefaultPosition, wxDefaultSize, 0 );
 
+   wxStaticBoxSizer* sbOtherHacks;
+	sbOtherHacks = new wxStaticBoxSizer( new wxStaticBox( m_PageEnhancements, wxID_ANY, wxT("Other Hacks") ), wxVERTICAL );
+	m_ZTPSpeedHack = new wxCheckBox( m_PageEnhancements, ID_ZTPSPEEDHACK, wxT("ZTP Speed-Up Hack"), wxDefaultPosition, wxDefaultSize, 0 );
+
 	// Sizers
 	wxBoxSizer* sEnhancements;
 	wxGridBagSizer* sTextureFilter;
@@ -286,6 +292,14 @@ void GFXConfigDialogDX::CreateGUIControls()
 	sbEFBHacks->Add( sEFBHacks, 1, wxEXPAND, 5 );
 	sEnhancements->Add( sbEFBHacks, 0, wxEXPAND|wxALL, 5 );
 
+   wxGridBagSizer* sOtherHacks;
+	sOtherHacks = new wxGridBagSizer( 0, 0 );
+	sOtherHacks->SetFlexibleDirection( wxBOTH );
+	sOtherHacks->SetNonFlexibleGrowMode( wxFLEX_GROWMODE_SPECIFIED );
+	sOtherHacks->Add( m_ZTPSpeedHack, wxGBPosition( 0, 0 ), wxGBSpan( 1, 1 ), wxALL, 5 );
+	sbOtherHacks->Add( sOtherHacks, 1, wxEXPAND, 5 );
+	sEnhancements->Add( sbOtherHacks, 0, wxEXPAND|wxALL, 5 );
+	
 	m_PageEnhancements->SetSizer( sEnhancements );
 	m_PageEnhancements->Layout();
 	sEnhancements->Fit( m_PageEnhancements );
@@ -443,6 +457,9 @@ void GFXConfigDialogDX::EnhancementsSettingsChanged(wxCommandEvent& event)
 	case ID_EFBSCALEDCOPY:
 			g_Config.bCopyEFBScaled = m_EFBScaledCopy->IsChecked();
 		break;
+   case ID_ZTPSPEEDHACK:
+			g_Config.bZTPSpeedHack = m_ZTPSpeedHack->IsChecked();
+		break;
 	}
 	UpdateGUI();
 }

Source/Plugins/Plugin_VideoDX9/Src/DlgSettings.h

@@ -106,6 +106,7 @@ class GFXConfigDialogDX : public wxDialog
 		wxCheckBox *m_MaxAnisotropy;
 		wxCheckBox *m_HiresTextures;
 		wxCheckBox *m_EFBScaledCopy;
+      wxCheckBox *m_ZTPSpeedHack;
 
 		//Advanced Tab
 		wxCheckBox *m_DisableFog;
@@ -172,7 +173,8 @@ class GFXConfigDialogDX : public wxDialog
 			ID_ABOUT,
 			ID_DIRERCT3D,
 			ID_PAGEENHANCEMENTS,
-			ID_PAGEADVANCED
+			ID_PAGEADVANCED,
+         ID_ZTPSPEEDHACK
 		};
 		void InitializeAdapters();
 		void OnClose(wxCloseEvent& event);

Source/Plugins/Plugin_VideoOGL/Src/GUI/ConfigDlg.cpp

@@ -68,6 +68,7 @@ BEGIN_EVENT_TABLE(GFXConfigDialogOGL,wxDialog)
 	EVT_CHECKBOX(ID_DISABLEFOG, GFXConfigDialogOGL::AdvancedSettingsChanged)
 	EVT_CHECKBOX(ID_OSDHOTKEY, GFXConfigDialogOGL::AdvancedSettingsChanged)
 	EVT_CHECKBOX(ID_HACK, GFXConfigDialogOGL::AdvancedSettingsChanged)
+	EVT_CHECKBOX(ID_ZTPSPEEDHACK, GFXConfigDialogOGL::AdvancedSettingsChanged)
 	EVT_CHECKBOX(ID_SAFETEXTURECACHE,GFXConfigDialogOGL::AdvancedSettingsChanged)
 	EVT_RADIOBUTTON(ID_RADIO_SAFETEXTURECACHE_SAFE, GFXConfigDialogOGL::AdvancedSettingsChanged)
 	EVT_RADIOBUTTON(ID_RADIO_SAFETEXTURECACHE_NORMAL, GFXConfigDialogOGL::AdvancedSettingsChanged)
@@ -204,6 +205,7 @@ void GFXConfigDialogOGL::InitializeGUIValues()
 	m_WidescreenHack->SetValue(g_Config.bWidescreenHack);
 	m_UseNativeMips->SetValue(g_Config.bUseNativeMips);
 	m_EFBScaledCopy->SetValue(g_Config.bCopyEFBScaled);
+	m_ZTPSpeedHack->SetValue(g_Config.bZTPSpeedHack);
 	// Enhancements
 	m_MaxAnisotropyCB->SetSelection(g_Config.iMaxAnisotropy - 1);
 	m_ForceFiltering->SetValue(g_Config.bForceFiltering);
@@ -291,7 +293,7 @@ void GFXConfigDialogOGL::InitializeGUITooltips()
 		wxT(" But it may also cause graphical errors and missing graphics."));
 	m_Radio_CopyEFBToRAM->SetToolTip(wxT("[This option will apply immediately and does not require a restart to take effect.]"));
 	m_Radio_CopyEFBToGL->SetToolTip(wxT("[This option will apply immediately and does not require a restart to take effect.]"));
-	
+	m_ZTPSpeedHack->SetToolTip(wxT("Speeds up Hyrule Field in Zelda: Twilight Princess"));
 	// Utility
 #ifdef _WIN32
 	m_DumpFrames->SetToolTip(
@@ -468,6 +470,7 @@ void GFXConfigDialogOGL::CreateGUIControls()
 	m_Radio_SafeTextureCache_Safe = new wxRadioButton(m_PageAdvanced, ID_RADIO_SAFETEXTURECACHE_SAFE, wxT("Safe"), wxDefaultPosition, wxDefaultSize, wxRB_GROUP);
 	m_Radio_SafeTextureCache_Normal = new wxRadioButton(m_PageAdvanced, ID_RADIO_SAFETEXTURECACHE_NORMAL, wxT("Normal"));
 	m_Radio_SafeTextureCache_Fast = new wxRadioButton(m_PageAdvanced, ID_RADIO_SAFETEXTURECACHE_FAST, wxT("Fast"));
+	m_ZTPSpeedHack = new wxCheckBox( m_PageAdvanced, ID_ZTPSPEEDHACK, wxT("ZTP Speed-Up Hack"), wxDefaultPosition, wxDefaultSize, 0 );
 
 	// Sizers
 	sHacks->Add(m_PhackvalueCB, 0, wxTOP, 0);
@@ -478,6 +481,7 @@ void GFXConfigDialogOGL::CreateGUIControls()
 	sbHacks->Add(m_Radio_SafeTextureCache_Normal, 0, wxALL, 5);
 	sbHacks->Add(m_Radio_SafeTextureCache_Fast, 0, wxALL, 5);
 	sHacks->Add(sbHacks, 0, wxEXPAND | (wxTOP), 5);
+	sHacks->Add(m_ZTPSpeedHack, 0, wxEXPAND | (wxTOP), 0);
 
 	// Sizers
 	sAdvanced = new wxBoxSizer(wxVERTICAL);
@@ -704,6 +708,9 @@ void GFXConfigDialogOGL::AdvancedSettingsChanged(wxCommandEvent& event)
 		g_Config.bOSDHotKey = m_OSDHotKey->IsChecked();
 		break;
 	// Hacks
+	case ID_ZTPSPEEDHACK:
+		g_Config.bZTPSpeedHack = m_ZTPSpeedHack->IsChecked();
+		break;
 	case ID_SAFETEXTURECACHE:
 		g_Config.bSafeTextureCache = m_SafeTextureCache->IsChecked();
 		break;

Source/Plugins/Plugin_VideoOGL/Src/GUI/ConfigDlg.h

@@ -128,6 +128,7 @@ class GFXConfigDialogOGL : public wxDialog
 		wxRadioButton *m_Radio_SafeTextureCache_Safe;
 		wxRadioButton *m_Radio_SafeTextureCache_Normal;
 		wxRadioButton *m_Radio_SafeTextureCache_Fast;
+      wxCheckBox *m_ZTPSpeedHack;
 		// Screen size
 		wxStaticText *m_TextScreenWidth, *m_TextScreenHeight, *m_TextScreenLeft, *m_TextScreenTop;
 		wxSlider *m_SliderWidth, *m_SliderHeight, *m_SliderLeft, *m_SliderTop;
@@ -182,6 +183,7 @@ class GFXConfigDialogOGL : public wxDialog
 			ID_RADIO_SAFETEXTURECACHE_FAST,
 			ID_HACK,
 			ID_PHACKVALUE,
+         ID_ZTPSPEEDHACK,
 
 			ID_DUMPTEXTURES,
 			ID_HIRESTEXTURES,