Bounding Box bugfixes.

- Fixes all (I hope) BBox-related unknown pointer crashes.
- Fixes wrong BBox values with Frame Skip on (and the resulting unknown pointer crashes).
- Fixes a small oversight on the change I made to the ISO Properties dialog.

This should also be a (very very little) bit faster than the previous version.

Source/Core/DolphinWX/Src/ISOProperties.cpp

@@ -325,7 +325,7 @@ void CISOProperties::CreateGUIControls(bool IsWad)
 	DisableWiimoteSpeaker->SetToolTip(_("Mutes the Wiimote speaker. Fixes random disconnections on real wiimotes. No effect on emulated wiimotes."));
 
 	// Video
-	UseBBox = new wxCheckBox(m_GameConfig, ID_ZTP_SPEEDUP, _("Enable Bounding Box Calculation"), wxDefaultPosition, wxDefaultSize, wxCHK_3STATE|wxCHK_ALLOW_3RD_STATE_FOR_USER);
+	UseBBox = new wxCheckBox(m_GameConfig, ID_USE_BBOX, _("Enable Bounding Box Calculation"), wxDefaultPosition, wxDefaultSize, wxCHK_3STATE|wxCHK_ALLOW_3RD_STATE_FOR_USER);
 	UseBBox->SetToolTip(_("If checked, the bounding box registers will be updated. Used by the Paper Mario games."));
 
 	UseZTPSpeedupHack = new wxCheckBox(m_GameConfig, ID_ZTP_SPEEDUP, _("ZTP hack"), wxDefaultPosition, wxDefaultSize, wxCHK_3STATE|wxCHK_ALLOW_3RD_STATE_FOR_USER);

Source/Core/DolphinWX/Src/ISOProperties.h

@@ -133,6 +133,7 @@ private:
 		ID_DISCSPEED,
 		ID_MERGEBLOCKS,
 		ID_AUDIO_DSP_HLE,
+		ID_USE_BBOX,
 		ID_ZTP_SPEEDUP,
 		ID_PHACKENABLE,
 		ID_PHSETTINGS,

Source/Core/VideoCommon/Src/BPStructs.cpp

@@ -37,6 +37,8 @@ u32 mapTexAddress;
 bool mapTexFound;
 int numWrites;
 
+extern volatile bool g_bSkipCurrentFrame;
+
 static const float s_gammaLUT[] = 
 {
 	1.0f,
@@ -401,7 +403,11 @@ void BPWritten(const BPCmd& bp)
 		{
 		if(g_ActiveConfig.bUseBBox)
 		{
-			// which is which? these are GUESSES!
+			// Don't compute bounding box if this frame is being skipped!
+			// Wrong but valid values are better than bogus values...
+			if(g_bSkipCurrentFrame)
+				break;
+
 			if (bp.address == BPMEM_CLEARBBOX1) {
 				int right = bp.newvalue >> 10;
 				int left = bp.newvalue & 0x3ff;
@@ -410,7 +416,6 @@ void BPWritten(const BPCmd& bp)
 				PixelEngine::bbox[0] = left;
 				PixelEngine::bbox[1] = right;
 				PixelEngine::bbox_active = true;
-				// WARN_LOG(VIDEO, "ClearBBox LR: %i, %08x - %i, %i", bp.address, bp.newvalue, left, right);
 			} else {
 				int bottom = bp.newvalue >> 10;
 				int top = bp.newvalue & 0x3ff;
@@ -419,7 +424,6 @@ void BPWritten(const BPCmd& bp)
 				PixelEngine::bbox[2] = top;
 				PixelEngine::bbox[3] = bottom;
 				PixelEngine::bbox_active = true;
-				// WARN_LOG(VIDEO, "ClearBBox TB: %i, %08x - %i, %i", bp.address, bp.newvalue, top, bottom);
 			}
 		}
 		}

Source/Core/VideoCommon/Src/PixelEngine.cpp

@@ -206,14 +206,45 @@ void Read16(u16& _uReturnValue, const u32 _iAddress)
 		INFO_LOG(PIXELENGINE, "(r16) TOKEN_REG : %04x", _uReturnValue);
 		break;
 
-		// The return values for these BBOX registers need to be gotten from the bounding box of the object. 
-		// See http://code.google.com/p/dolphin-emu/issues/detail?id=360#c74 for more details.
+	case PE_BBOX_LEFT:
+	{
+		// Left must be even and 606px max
+		_uReturnValue = std::min((u16) 606, bbox[0]) & ~1;
 
-	// 0x80, 0xa0, 0x80, 0xa0 makes Paper Mario happy.
-	case PE_BBOX_LEFT:   _uReturnValue = bbox[0]; INFO_LOG(PIXELENGINE, "R: BBOX_LEFT   = %i", bbox[0]); bbox_active = false; break;
-	case PE_BBOX_RIGHT:  _uReturnValue = bbox[1]; INFO_LOG(PIXELENGINE, "R: BBOX_RIGHT  = %i", bbox[1]); bbox_active = false; break;
-	case PE_BBOX_TOP:    _uReturnValue = bbox[2]; INFO_LOG(PIXELENGINE, "R: BBOX_TOP    = %i", bbox[2]); bbox_active = false; break;
-	case PE_BBOX_BOTTOM: _uReturnValue = bbox[3]; INFO_LOG(PIXELENGINE, "R: BBOX_BOTTOM = %i", bbox[3]); bbox_active = false; break;
+		INFO_LOG(PIXELENGINE, "R: BBOX_LEFT   = %i", _uReturnValue);
+		bbox_active = false;
+		break;
+	}
+
+	case PE_BBOX_RIGHT:
+	{
+		// Right must be odd and 607px max
+		_uReturnValue = std::min((u16) 607, bbox[1]) | 1;
+
+		INFO_LOG(PIXELENGINE, "R: BBOX_RIGHT  = %i", _uReturnValue);
+		bbox_active = false;
+		break;
+	}
+
+	case PE_BBOX_TOP:
+	{
+		// Top must be even and 478px max
+		_uReturnValue = std::min((u16) 478, bbox[2]) & ~1;
+
+		INFO_LOG(PIXELENGINE, "R: BBOX_TOP    = %i", _uReturnValue);
+		bbox_active = false;
+		break;
+	}
+
+	case PE_BBOX_BOTTOM:
+	{
+		// Bottom must be odd and 479px max
+		_uReturnValue = std::min((u16) 479, bbox[3]) | 1;
+
+		INFO_LOG(PIXELENGINE, "R: BBOX_BOTTOM = %i", _uReturnValue);
+		bbox_active = false;
+		break;
+	}
 
 	case PE_PERF_0L:
 	case PE_PERF_0H:

Source/Core/VideoCommon/Src/VertexLoader.cpp

@@ -124,41 +124,18 @@ void LOADERDECL UpdateBoundingBox()
 	o[1] = t[0] * proj_matrix[4]  + t[1] * proj_matrix[5]  + t[2] * proj_matrix[6] + proj_matrix[7];
 	o[2] = t[0] * proj_matrix[12] + t[1] * proj_matrix[13] + t[2] * proj_matrix[14] + proj_matrix[15];
 
-
 	o[0] /= o[2];
 	o[1] /= o[2];
 
-	// should possibly adjust for viewport?
+	// Max width seems to be 608, while max height is 480
+	// Here height is set to 484 as BBox bottom always seems to be off by a few pixels
 	o[0] = (o[0] + 1.0f) * 304.0f;
-	o[1] = (1.0f - o[1]) * 240.0f;
+	o[1] = (1.0f - o[1]) * 242.0f;
 
-    if (o[0] < PixelEngine::bbox[0])
-	{
-		PixelEngine::bbox[0] = (u16) std::max(0.0f, o[0]);
-
-		// Hardware tests bounding boxes in 2x2 blocks => left and top are even, right and bottom are odd
-		PixelEngine::bbox[0] &= ~1;
-	}
-
-	if (o[0] > PixelEngine::bbox[1])
-	{
-		PixelEngine::bbox[1] = (u16) std::min(608.0f, o[0]);
-		if(!(PixelEngine::bbox[1] & 1) && PixelEngine::bbox[1] != 0)
-			PixelEngine::bbox[1]--;
-	}
-
-	if (o[1] < PixelEngine::bbox[2])
-	{
-		PixelEngine::bbox[2] = (u16) std::max(0.0f, o[1]);
-		PixelEngine::bbox[2] &= ~1;
-	}
-
-	if (o[1] > PixelEngine::bbox[3])
-	{
-		PixelEngine::bbox[3] = (u16) std::min(480.0f, o[1]);
-		if(!(PixelEngine::bbox[3] & 1) && PixelEngine::bbox[3] != 0)
-			PixelEngine::bbox[3]--;
-	}
+	if (o[0] < PixelEngine::bbox[0]) PixelEngine::bbox[0] = (u16) std::max(0.0f, o[0]);
+	if (o[0] > PixelEngine::bbox[1]) PixelEngine::bbox[1] = (u16) o[0]; 
+	if (o[1] < PixelEngine::bbox[2]) PixelEngine::bbox[2] = (u16) std::max(0.0f, o[1]);
+	if (o[1] > PixelEngine::bbox[3]) PixelEngine::bbox[3] = (u16) o[1];
 }
 
 void LOADERDECL TexMtx_ReadDirect_UByte()