/*
	TA-VTX handling

	Parsing of the TA stream and generation of vertex data !
*/
#include "ta.h"
#include "ta_ctx.h"
#include "pvr_mem.h"
#include "Renderer_if.h"
#include "cfg/option.h"

#include <algorithm>
#include <utility>

#define TACALL DYNACALL
#ifdef NDEBUG
#undef verify
#define verify(x)
#endif

static u8 f32_su8_tbl[65536];

static u8 float_to_satu8(float val) {
	return f32_su8_tbl[(u32&)val >> 16];
}

static TA_context *vd_ctx;
#define vd_rc (vd_ctx->rend)

constexpr u32 ListType_None = -1;

static f32 f16(u16 v)
{
	u32 z=v<<16;
	return *(f32*)&z;
}

class BaseTAParser
{
	static Ta_Dma *DYNACALL NullVertexData(Ta_Dma *data, Ta_Dma *data_end)
	{
		INFO_LOG(PVR, "TA: Invalid state, ignoring VTX data");
		return data + SZ32;
	}

public:
	static bool startList(u32 listType)
	{
		if (CurrentList != ListType_None)
			return true;
		switch (listType)
		{
		case ListType_Opaque:
			CurrentPPlist = &vd_rc.global_param_op;
			break;
		case ListType_Punch_Through:
			CurrentPPlist = &vd_rc.global_param_pt;
			break;
		case ListType_Translucent:
			CurrentPPlist = &vd_rc.global_param_tr;
			break;
		case ListType_Opaque_Modifier_Volume:
		case ListType_Translucent_Modifier_Volume:
			break;
		default:
			WARN_LOG(PVR, "Invalid list type %d", listType);
			return false;
		}
		CurrentList = listType;
		CurrentPP = nullptr;

		return true;
	}

	static void endList()
	{
		if (CurrentList == ListType_None)
			return;
		if (CurrentPP != nullptr && CurrentPP->count == 0 && CurrentPP == &CurrentPPlist->back())
			CurrentPPlist->pop_back();
		CurrentPP = nullptr;
		CurrentPPlist = nullptr;

		if (CurrentList == ListType_Opaque_Modifier_Volume
				|| CurrentList == ListType_Translucent_Modifier_Volume)
			endModVol();
		CurrentList = ListType_None;
		VertexDataFP = NullVertexData;
	}

	static int getCurrentList() {
		return CurrentList;
	}

	static u32 getTileClip() {
		return tileclip_val;
	}

	static void setTileClip(u32 tileclip) {
		tileclip_val = tileclip;
	}

protected:
	typedef Ta_Dma* DYNACALL TaListFP(Ta_Dma* data, Ta_Dma* data_end);
	typedef void TACALL TaPolyParamFP(void* ptr);

	static void endModVol()
	{
		std::vector<ModifierVolumeParam> *list = nullptr;
		if (CurrentList == ListType_Opaque_Modifier_Volume)
			list = &vd_rc.global_param_mvo;
		else if (CurrentList == ListType_Translucent_Modifier_Volume)
			list = &vd_rc.global_param_mvo_tr;
		else
			return;
		if (!list->empty())
		{
			ModifierVolumeParam *p = &list->back();
			p->count = vd_rc.modtrig.size() - p->first;
			if (p->count == 0)
				list->pop_back();
		}
	}

	static void reset()
	{
		memset(FaceBaseColor, 0xff, sizeof(FaceBaseColor));
		memset(FaceOffsColor, 0xff, sizeof(FaceOffsColor));
		memset(FaceBaseColor1, 0xff, sizeof(FaceBaseColor1));
		memset(FaceOffsColor1, 0xff, sizeof(FaceOffsColor1));
		SFaceBaseColor = 0;
		SFaceOffsColor = 0;
		lmr = nullptr;
		CurrentList = ListType_None;
		CurrentPP = nullptr;
		CurrentPPlist = nullptr;
		VertexDataFP = NullVertexData;
	}

	static const u32 *ta_type_lut;

	//cache state vars
	static u32 tileclip_val;

	//TA state vars
	static u8 FaceBaseColor[4];
	static u8 FaceOffsColor[4];
	static u8 FaceBaseColor1[4];
	static u8 FaceOffsColor1[4];
	static u32 SFaceBaseColor;
	static u32 SFaceOffsColor;
	//vdec state variables
	static ModTriangle* lmr;

	static u32 CurrentList;
	static TaListFP *VertexDataFP;
public:
	static std::vector<PolyParam> *CurrentPPlist;
	static PolyParam* CurrentPP;
	static TaListFP* TaCmd;
	inline static bool fetchTextures = true;
};

const u32 *BaseTAParser::ta_type_lut = TaTypeLut::instance().table;
u32 BaseTAParser::tileclip_val;
alignas(4) u8 BaseTAParser::FaceBaseColor[4];
alignas(4) u8 BaseTAParser::FaceOffsColor[4];
alignas(4) u8 BaseTAParser::FaceBaseColor1[4];
alignas(4) u8 BaseTAParser::FaceOffsColor1[4];
u32 BaseTAParser::SFaceBaseColor;
u32 BaseTAParser::SFaceOffsColor;
ModTriangle* BaseTAParser::lmr;
u32 BaseTAParser::CurrentList;
PolyParam* BaseTAParser::CurrentPP;
std::vector<PolyParam>* BaseTAParser::CurrentPPlist;
BaseTAParser::TaListFP *BaseTAParser::TaCmd;
BaseTAParser::TaListFP *BaseTAParser::VertexDataFP;

template<int Red = 0, int Green = 1, int Blue = 2, int Alpha = 3>
class TAParserTempl : public BaseTAParser
{
	//part : 0 fill all data , 1 fill upper 32B , 2 fill lower 32B
	//Poly decoder , will be moved to pvr code
	template <u32 poly_type,u32 part>
	static Ta_Dma* TACALL ta_handle_poly(Ta_Dma* data,Ta_Dma* data_end)
	{
		TA_VertexParam* vp=(TA_VertexParam*)data;
		u32 rv=0;

		if constexpr (part == 2)
		{
			TaCmd=ta_main;
		}

		switch (poly_type)
		{
#define ver_32B_def(num) \
case num : {\
AppendPolyVertex##num(&vp->vtx##num);\
rv=SZ32; }\
break;

			//32b , always in one pass :)
			ver_32B_def(0);//(Non-Textured, Packed Color)
			ver_32B_def(1);//(Non-Textured, Floating Color)
			ver_32B_def(2);//(Non-Textured, Intensity)
			ver_32B_def(3);//(Textured, Packed Color)
			ver_32B_def(4);//(Textured, Packed Color, 16bit UV)
			ver_32B_def(7);//(Textured, Intensity)
			ver_32B_def(8);//(Textured, Intensity, 16bit UV)
			ver_32B_def(9);//(Non-Textured, Packed Color, with Two Volumes)
			ver_32B_def(10);//(Non-Textured, Intensity,	with Two Volumes)

#undef ver_32B_def

#define ver_64B_def(num) \
case num : {\
/*process first half*/\
	if constexpr (part != 2)\
	{\
	rv+=SZ32;\
	AppendPolyVertex##num##A(&vp->vtx##num##A);\
	}\
	/*process second half*/\
	if constexpr (part == 0)\
	{\
	AppendPolyVertex##num##B(&vp->vtx##num##B);\
	rv+=SZ32;\
	}\
	else if constexpr (part == 2)\
	{\
	AppendPolyVertex##num##B((TA_Vertex##num##B*)data);\
	rv+=SZ32;\
	}\
	}\
	break;


			//64b , may be on 2 pass
			ver_64B_def(5);//(Textured, Floating Color)
			ver_64B_def(6);//(Textured, Floating Color, 16bit UV)
			ver_64B_def(11);//(Textured, Packed Color,	with Two Volumes)	
			ver_64B_def(12);//(Textured, Packed Color, 16bit UV, with Two Volumes)
			ver_64B_def(13);//(Textured, Intensity,	with Two Volumes)
			ver_64B_def(14);//(Textured, Intensity, 16bit UV, with Two Volumes)
#undef ver_64B_def
		}

		return data+rv;
	};

	//Code Splitter/routers

	static Ta_Dma* TACALL ta_modvolB_32(Ta_Dma* data,Ta_Dma* data_end)
	{
		AppendModVolVertexB((TA_ModVolB*)data);
		TaCmd=ta_main;
		return data+SZ32;
	}
		
	static Ta_Dma* TACALL ta_mod_vol_data(Ta_Dma* data,Ta_Dma* data_end)
	{
		TA_VertexParam* vp=(TA_VertexParam*)data;
		if (data == data_end - SZ32)
		{
			AppendModVolVertexA(&vp->mvolA);
			//32B more needed , 32B done :)
			TaCmd=ta_modvolB_32;
			return data+SZ32;
		}
		else
		{
			//all 64B done
			AppendModVolVertexA(&vp->mvolA);
			AppendModVolVertexB(&vp->mvolB);
			return data+SZ64;
		}
	}
	static Ta_Dma* TACALL ta_spriteB_data(Ta_Dma* data,Ta_Dma* data_end)
	{
		//32B more needed , 32B done :)
		TaCmd=ta_main;
			
		AppendSpriteVertexB((TA_Sprite1B*)data);

		return data+SZ32;
	}
	static Ta_Dma* TACALL ta_sprite_data(Ta_Dma* data,Ta_Dma* data_end)
	{
		verify(data->pcw.ParaType==ParamType_Vertex_Parameter);
		if (data == data_end - SZ32)
		{
			//32B more needed , 32B done :)
			TaCmd=ta_spriteB_data;

			TA_VertexParam* vp=(TA_VertexParam*)data;

			AppendSpriteVertexA(&vp->spr1A);
			return data+SZ32;
		}
		else
		{
			TA_VertexParam* vp=(TA_VertexParam*)data;

			AppendSpriteVertexA(&vp->spr1A);
			AppendSpriteVertexB(&vp->spr1B);

			return data+SZ64;
		}
	}

	template <u32 poly_type,u32 poly_size>
	static Ta_Dma* TACALL ta_poly_data(Ta_Dma* data,Ta_Dma* data_end)
	{
		verify(data < data_end);

					//If SZ64  && 32 bytes
#define IS_FIST_HALF (poly_size != SZ32 && data == data_end - SZ32)

		if (IS_FIST_HALF)
			goto fist_half;

		do
		{
			verify(data->pcw.ParaType == ParamType_Vertex_Parameter);
			ta_handle_poly<poly_type,0>(data, 0);
			if (data->pcw.EndOfStrip)
				goto strip_end;
			data += poly_size;
		} while (data <= data_end - poly_size);
			
		if (IS_FIST_HALF)
		{
		fist_half:
			ta_handle_poly<poly_type,1>(data,0);
			if (data->pcw.EndOfStrip) EndPolyStrip();
			TaCmd=ta_handle_poly<poly_type,2>;
					
			data+=SZ32;
		}
			
		return data;

strip_end:
		TaCmd=ta_main;
		if (data->pcw.EndOfStrip)
			EndPolyStrip();
		return data+poly_size;
	}

	static void TACALL AppendPolyParam2Full(void* vpp)
	{
		Ta_Dma* pp=(Ta_Dma*)vpp;

		AppendPolyParam2A((TA_PolyParam2A*)&pp[0]);
		AppendPolyParam2B((TA_PolyParam2B*)&pp[1]);
	}

	static void TACALL AppendPolyParam4Full(void* vpp)
	{
		Ta_Dma* pp=(Ta_Dma*)vpp;

		AppendPolyParam4A((TA_PolyParam4A*)&pp[0]);
		AppendPolyParam4B((TA_PolyParam4B*)&pp[1]);
	}
	//Second part of poly data
	template <int t>
	static Ta_Dma* TACALL ta_poly_B_32(Ta_Dma* data,Ta_Dma* data_end)
	{
		if constexpr (t == 2)
			AppendPolyParam2B((TA_PolyParam2B*)data);
		else
			AppendPolyParam4B((TA_PolyParam4B*)data);
	
		TaCmd=ta_main;
		return data+SZ32;
	}

	static Ta_Dma* TACALL ta_main(Ta_Dma* data, Ta_Dma* data_end)
	{
		while (data < data_end)
		{
			if (settings.platform.isNaomi2() && (data->pcw.full & 0x08000000) != 0)
			{
				DEBUG_LOG(PVR, "Naomi 2 command detected");
				break;
			}
			switch (data->pcw.ParaType)
			{
				//Control parameter
				//32Bw3
			case ParamType_End_Of_List:
				endList();
				data += SZ32;
				break;

				//32B
			case ParamType_User_Tile_Clip:
				setClipRect(data->data_32[3] & 63, data->data_32[4] & 31, data->data_32[5] & 63, data->data_32[6] & 31);
				data += SZ32;
				break;

				//32B
			case ParamType_Object_List_Set:
				INFO_LOG(PVR, "Unsupported list type: ParamType_Object_List_Set");	// NAOMI Virtual on Oratorio Tangram
				// *cough* ignore it :p
				data += SZ32;
				break;

				//Global Parameter
				//ModVolue :32B
				//PolyType :32B/64B
			case ParamType_Polygon_or_Modifier_Volume:
				{
					setClipMode(data->pcw.User_Clip);
					//Yep , C++ IS lame & limited
					#include "ta_const_df.h"
					if (CurrentList == ListType_None && !startList(data->pcw.ListType))
					{
						// Invalid list type
						data += SZ32;
					}
					else if (IsModVolList(CurrentList))
					{
						//accept mod data
						StartModVol((TA_ModVolParam*)data);
						VertexDataFP = ta_mod_vol_data;
						data += SZ32;
					}
					else
					{
						u32 uid = ta_type_lut[data->pcw.obj_ctrl];
						if (uid == TaTypeLut::INVALID_TYPE)
						{
							WARN_LOG(PVR, "Invalid TA type %08x", data->pcw.full);
							data += SZ32;
						}
						else
						{
							u32 psz = uid >> 30;
							u32 pdid = (u8)uid;
							u32 ppid = (u8)(uid >> 8);

							VertexDataFP = ta_poly_data_lut[pdid];

							if (data <= data_end - psz)
							{
								// Full poly, 32B or 64B
								ta_poly_param_lut[ppid](data);
								data += psz;
							}
							else
							{
								// 64B, first part
								ta_poly_param_a_lut[ppid](data);
								// Handle next 32B
								TaCmd = ta_poly_param_b_lut[ppid];
								data += SZ32;
							}
						}
					}
				}
				break;
				//32B
				//Sets Sprite info , and switches to ta_sprite_data function
			case ParamType_Sprite:
				setClipMode(data->pcw.User_Clip);
				if (CurrentList != ListType_None || startList(data->pcw.ListType))
				{
					VertexDataFP = ta_sprite_data;
					AppendSpriteParam((TA_SpriteParam*)data);
				}
				data += SZ32;
				break;

				//Variable size
			case ParamType_Vertex_Parameter:
				data = VertexDataFP(data, data_end);
				break;

				//not handled
				//Assumed to be 32B
			case 3:
			case 6:
				WARN_LOG(PVR, "Unhandled param type pcw %08x", data->pcw.full);
				throw TAParserException();
				//die("Unhandled parameter");
				//data += SZ32;
				break;
			}
		}

		return data;
	}

	TAParserTempl();

public:
	static void reset()
	{
		TaCmd = ta_main;
		BaseTAParser::reset();
		setClipRect(0, 0, 39, 14);
		setClipMode(0);
	}

private:
	static void setClipRect(u32 xmin, u32 ymin, u32 xmax, u32 ymax)
	{
		u32 rv = tileclip_val & 0xF0000000;
		rv |= xmin; 		// 6 bits
		rv |= xmax << 6;	// 6 bits
		rv |= ymin << 12;	// 5 bits
		rv |= ymax << 17;	// 5 bits
		tileclip_val = rv;
	}

	static void setClipMode(u32 mode)
	{
		//Group_En bit seems ignored, thanks p1pkin
		tileclip_val = (tileclip_val & ~0xF0000000) | (mode << 28);
	}

	//Polys  -- update code on sprites if that gets updated too --
	template<class T>
	static void glob_param_bdc_(T* pp)
	{
		PolyParam* d_pp = CurrentPP;
		if (d_pp == NULL || d_pp->count != 0)
		{
			CurrentPPlist->emplace_back();
			d_pp = &CurrentPPlist->back();
			CurrentPP = d_pp;
		}
		d_pp->init();
		d_pp->first = vd_rc.verts.size();

		d_pp->isp = pp->isp;
		d_pp->tsp = pp->tsp;
		d_pp->tcw = pp->tcw;
		d_pp->pcw = pp->pcw;
		d_pp->tileclip = tileclip_val;

		if (d_pp->pcw.Texture && fetchTextures)
			d_pp->texture = renderer->GetTexture(d_pp->tsp, d_pp->tcw);
	}

	#define glob_param_bdc(pp) glob_param_bdc_( (TA_PolyParam0*)pp)

	#define poly_float_color_(to,a,r,g,b) \
		to[Red] = float_to_satu8(r);	\
		to[Green] = float_to_satu8(g);	\
		to[Blue] = float_to_satu8(b);	\
		to[Alpha] = float_to_satu8(a);


	#define poly_float_color(to,src) \
		poly_float_color_(to,pp->src##A,pp->src##R,pp->src##G,pp->src##B)

	// Poly param handling

	// Packed/Floating Color
	static void TACALL AppendPolyParam0(void* vpp)
	{
		TA_PolyParam0* pp=(TA_PolyParam0*)vpp;

		glob_param_bdc(pp);
	}

	// Intensity, no Offset Color
	static void TACALL AppendPolyParam1(void* vpp)
	{
		TA_PolyParam1* pp=(TA_PolyParam1*)vpp;

		glob_param_bdc(pp);
		poly_float_color(FaceBaseColor,FaceColor);
	}

	// Intensity, use Offset Color
	static void TACALL AppendPolyParam2A(void* vpp)
	{
		TA_PolyParam2A* pp=(TA_PolyParam2A*)vpp;

		glob_param_bdc(pp);
	}

	static void TACALL AppendPolyParam2B(void* vpp)
	{
		TA_PolyParam2B* pp=(TA_PolyParam2B*)vpp;

		poly_float_color(FaceBaseColor,FaceColor);
		poly_float_color(FaceOffsColor,FaceOffset);
	}

	// Packed Color, with Two Volumes
	static void TACALL AppendPolyParam3(void* vpp)
	{
		TA_PolyParam3* pp=(TA_PolyParam3*)vpp;

		glob_param_bdc(pp);

		CurrentPP->tsp1.full = pp->tsp1.full;
		CurrentPP->tcw1.full = pp->tcw1.full;
		if (pp->pcw.Texture && fetchTextures)
			CurrentPP->texture1 = renderer->GetTexture(pp->tsp1, pp->tcw1);
	}

	// Intensity, with Two Volumes
	static void TACALL AppendPolyParam4A(void* vpp)
	{
		TA_PolyParam4A* pp=(TA_PolyParam4A*)vpp;

		glob_param_bdc(pp);

		CurrentPP->tsp1.full = pp->tsp1.full;
		CurrentPP->tcw1.full = pp->tcw1.full;
		if (pp->pcw.Texture && fetchTextures)
			CurrentPP->texture1 = renderer->GetTexture(pp->tsp1, pp->tcw1);
	}

	static void TACALL AppendPolyParam4B(void* vpp)
	{
		TA_PolyParam4B* pp=(TA_PolyParam4B*)vpp;

		poly_float_color(FaceBaseColor, FaceColor0);
		poly_float_color(FaceBaseColor1, FaceColor1);
	}

	//Poly Strip handling
	static void EndPolyStrip()
	{
		CurrentPP->count = vd_rc.verts.size() - CurrentPP->first;

		if (CurrentPP->count > 0)
		{
			CurrentPPlist->push_back(*CurrentPP);
			CurrentPP = &CurrentPPlist->back();
			CurrentPP->first = vd_rc.verts.size();
			CurrentPP->count = 0;
		}
	}
	
	static inline void update_fz(float z)
	{
		if ((s32&)vd_rc.fZ_max<(s32&)z && (s32&)z<0x49800000)
			vd_rc.fZ_max=z;
	}

		//Poly Vertex handlers
		//Append vertex base
	template<class T>
	static Vertex* vert_cvt_base_(T* vtx)
	{
		f32 invW = vtx->xyz[2];
		vd_rc.verts.emplace_back();
		Vertex* cv = &vd_rc.verts.back();
		cv->x = vtx->xyz[0];
		cv->y = vtx->xyz[1];
		cv->z = invW;
		update_fz(invW);
		return cv;
	}

	#define vert_cvt_base Vertex* cv=vert_cvt_base_((TA_Vertex0*)vtx)

		//Resume vertex base (for B part)
	#define vert_res_base \
		Vertex* cv = &vd_rc.verts.back();

		//uv 16/32
	#define vert_uv_32(u_name,v_name) \
		cv->u = (vtx->u_name);\
		cv->v = (vtx->v_name);

	#define vert_uv_16(u_name,v_name) \
		cv->u = f16(vtx->u_name);\
		cv->v = f16(vtx->v_name);

	#define vert_uv1_32(u_name,v_name) \
		cv->u1 = (vtx->u_name);\
		cv->v1 = (vtx->v_name);

	#define vert_uv1_16(u_name,v_name) \
		cv->u1 = f16(vtx->u_name);\
		cv->v1 = f16(vtx->v_name);

		//Color conversions
	#define vert_packed_color_(to,src) \
		{ \
		u32 t=src; \
		to[Blue] = (u8)(t);t>>=8;\
		to[Green] = (u8)(t);t>>=8;\
		to[Red] = (u8)(t);t>>=8;\
		to[Alpha] = (u8)(t);      \
		}

	#define vert_float_color_(to,a,r,g,b) \
		to[Red] = float_to_satu8(r); \
		to[Green] = float_to_satu8(g); \
		to[Blue] = float_to_satu8(b); \
		to[Alpha] = float_to_satu8(a);

		//Macros to make thins easier ;)
	#define vert_packed_color(to,src) \
		vert_packed_color_(cv->to,vtx->src);

	#define vert_float_color(to,src) \
		vert_float_color_(cv->to,vtx->src##A,vtx->src##R,vtx->src##G,vtx->src##B)

		//Intensity handling

		//Notes:
		//Alpha doesn't get intensity
		//Intensity is clamped before the mul, as well as on face color to work the same as the hardware. [Fixes red dog]

	#define vert_face_base_color(baseint) \
		{ u32 satint = float_to_satu8(vtx->baseint); \
		cv->col[Red] = FaceBaseColor[Red] * satint / 256;  \
		cv->col[Green] = FaceBaseColor[Green] * satint / 256;  \
		cv->col[Blue] = FaceBaseColor[Blue] * satint / 256;  \
		cv->col[Alpha] = FaceBaseColor[Alpha]; }

	#define vert_face_offs_color(offsint) \
		{ u32 satint = float_to_satu8(vtx->offsint); \
		cv->spc[Red] = FaceOffsColor[Red] * satint / 256;  \
		cv->spc[Green] = FaceOffsColor[Green] * satint / 256;  \
		cv->spc[Blue] = FaceOffsColor[Blue] * satint / 256;  \
		cv->spc[Alpha] = FaceOffsColor[Alpha]; }

	#define vert_face_base_color1(baseint) \
		{ u32 satint = float_to_satu8(vtx->baseint); \
		cv->col1[Red] = FaceBaseColor1[Red] * satint / 256;  \
		cv->col1[Green] = FaceBaseColor1[Green] * satint / 256;  \
		cv->col1[Blue] = FaceBaseColor1[Blue] * satint / 256;  \
		cv->col1[Alpha] = FaceBaseColor1[Alpha]; }

	#define vert_face_offs_color1(offsint) \
		{ u32 satint = float_to_satu8(vtx->offsint); \
		cv->spc1[Red] = FaceOffsColor1[Red] * satint / 256;  \
		cv->spc1[Green] = FaceOffsColor1[Green] * satint / 256;  \
		cv->spc1[Blue] = FaceOffsColor1[Blue] * satint / 256;  \
		cv->spc1[Alpha] = FaceOffsColor1[Alpha]; }


	//(Non-Textured, Packed Color)
	static void AppendPolyVertex0(TA_Vertex0* vtx)
	{
		vert_cvt_base;

		vert_packed_color(col,BaseCol);
	}

	//(Non-Textured, Floating Color)
	static void AppendPolyVertex1(TA_Vertex1* vtx)
	{
		vert_cvt_base;

		vert_float_color(col,Base);
	}

	//(Non-Textured, Intensity)
	static void AppendPolyVertex2(TA_Vertex2* vtx)
	{
		vert_cvt_base;

		vert_face_base_color(BaseInt);
	}

	//(Textured, Packed Color)
	static void AppendPolyVertex3(TA_Vertex3* vtx)
	{
		vert_cvt_base;

		vert_packed_color(col,BaseCol);
		vert_packed_color(spc,OffsCol);

		vert_uv_32(u,v);
	}

	//(Textured, Packed Color, 16bit UV)
	static void AppendPolyVertex4(TA_Vertex4* vtx)
	{
		vert_cvt_base;

		vert_packed_color(col,BaseCol);
		vert_packed_color(spc,OffsCol);

		vert_uv_16(u,v);
	}

	//(Textured, Floating Color)
	static void AppendPolyVertex5A(TA_Vertex5A* vtx)
	{
		vert_cvt_base;

		//Colors are on B

		vert_uv_32(u,v);
	}

	static void AppendPolyVertex5B(TA_Vertex5B* vtx)
	{
		vert_res_base;

		vert_float_color(col,Base);
		vert_float_color(spc,Offs);
	}

	//(Textured, Floating Color, 16bit UV)
	static void AppendPolyVertex6A(TA_Vertex6A* vtx)
	{
		vert_cvt_base;

		//Colors are on B

		vert_uv_16(u,v);
	}

	static void AppendPolyVertex6B(TA_Vertex6B* vtx)
	{
		vert_res_base;

		vert_float_color(col,Base);
		vert_float_color(spc,Offs);
	}

	//(Textured, Intensity)
	static void AppendPolyVertex7(TA_Vertex7* vtx)
	{
		vert_cvt_base;

		vert_face_base_color(BaseInt);
		vert_face_offs_color(OffsInt);

		vert_uv_32(u,v);
	}

	//(Textured, Intensity, 16bit UV)
	static void AppendPolyVertex8(TA_Vertex8* vtx)
	{
		vert_cvt_base;

		vert_face_base_color(BaseInt);
		vert_face_offs_color(OffsInt);

		vert_uv_16(u,v);

	}

	//(Non-Textured, Packed Color, with Two Volumes)
	static void AppendPolyVertex9(TA_Vertex9* vtx)
	{
		vert_cvt_base;

		vert_packed_color(col,BaseCol0);
		vert_packed_color(col1, BaseCol1);
	}

	//(Non-Textured, Intensity,	with Two Volumes)
	static void AppendPolyVertex10(TA_Vertex10* vtx)
	{
		vert_cvt_base;

		vert_face_base_color(BaseInt0);
		vert_face_base_color1(BaseInt1);
	}

	//(Textured, Packed Color,	with Two Volumes)	
	static void AppendPolyVertex11A(TA_Vertex11A* vtx)
	{
		vert_cvt_base;

		vert_packed_color(col,BaseCol0);
		vert_packed_color(spc,OffsCol0);

		vert_uv_32(u0,v0);
	}

	static void AppendPolyVertex11B(TA_Vertex11B* vtx)
	{
		vert_res_base;

		vert_packed_color(col1, BaseCol1);
		vert_packed_color(spc1, OffsCol1);

		vert_uv1_32(u1, v1);
	}

	//(Textured, Packed Color, 16bit UV, with Two Volumes)
	static void AppendPolyVertex12A(TA_Vertex12A* vtx)
	{
		vert_cvt_base;

		vert_packed_color(col,BaseCol0);
		vert_packed_color(spc,OffsCol0);

		vert_uv_16(u0,v0);
	}

	static void AppendPolyVertex12B(TA_Vertex12B* vtx)
	{
		vert_res_base;

		vert_packed_color(col1, BaseCol1);
		vert_packed_color(spc1, OffsCol1);

		vert_uv1_16(u1, v1);
	}

	//(Textured, Intensity,	with Two Volumes)
	static void AppendPolyVertex13A(TA_Vertex13A* vtx)
	{
		vert_cvt_base;

		vert_face_base_color(BaseInt0);
		vert_face_offs_color(OffsInt0);

		vert_uv_32(u0,v0);
	}

	static void AppendPolyVertex13B(TA_Vertex13B* vtx)
	{
		vert_res_base;

		vert_face_base_color1(BaseInt1);
		vert_face_offs_color1(OffsInt1);

		vert_uv1_32(u1,v1);
	}

	//(Textured, Intensity, 16bit UV, with Two Volumes)
	static void AppendPolyVertex14A(TA_Vertex14A* vtx)
	{
		vert_cvt_base;

		vert_face_base_color(BaseInt0);
		vert_face_offs_color(OffsInt0);

		vert_uv_16(u0,v0);
	}

	static void AppendPolyVertex14B(TA_Vertex14B* vtx)
	{
		vert_res_base;

		vert_face_base_color1(BaseInt1);
		vert_face_offs_color1(OffsInt1);

		vert_uv1_16(u1, v1);
	}

	//Sprites
	static void AppendSpriteParam(TA_SpriteParam* spr)
	{
		PolyParam* d_pp = CurrentPP;
		if (CurrentPP == NULL || CurrentPP->count != 0)
		{
			if (CurrentPPlist == nullptr)	// wldkickspw
				return;
			CurrentPPlist->emplace_back();
			d_pp = &CurrentPPlist->back();
			CurrentPP = d_pp;
		}
		d_pp->init();
		d_pp->first = vd_rc.verts.size();
		d_pp->isp = spr->isp;
		d_pp->tsp = spr->tsp;
		d_pp->tcw = spr->tcw;
		d_pp->pcw = spr->pcw;
		d_pp->tileclip = tileclip_val;

		if (d_pp->pcw.Texture && fetchTextures)
			d_pp->texture = renderer->GetTexture(d_pp->tsp, d_pp->tcw);

		SFaceBaseColor = spr->BaseCol;
		SFaceOffsColor = spr->OffsCol;
        
        d_pp->isp.CullMode ^= 1;
	}

	#define append_sprite(indx) \
		vert_packed_color_(cv[indx].col,SFaceBaseColor)\
		vert_packed_color_(cv[indx].spc,SFaceOffsColor)

	#define sprite_uv(indx,u_name,v_name) \
		cv[indx].u = f16(sv->u_name);\
		cv[indx].v = f16(sv->v_name);

	//Sprite Vertex Handlers
	static void AppendSpriteVertexA(TA_Sprite1A* sv)
	{
		if (CurrentPP == nullptr)
			return;
        CurrentPP->count = 4;

        vd_rc.verts.resize(vd_rc.verts.size() + 4);
		Vertex *cv = &vd_rc.verts.back() - 3;

		//Fill static stuff
		append_sprite(0);
		append_sprite(1);
		append_sprite(2);
		append_sprite(3);

		cv[2].x=sv->x0;
		cv[2].y=sv->y0;
		cv[2].z=sv->z0;
		update_fz(sv->z0);

		cv[3].x=sv->x1;
		cv[3].y=sv->y1;
		cv[3].z=sv->z1;
		update_fz(sv->z1);

		cv[1].x=sv->x2;
	}

	static void CaclulateSpritePlane(Vertex* base)
	{
		const Vertex& A=base[2];
		const Vertex& B=base[3];
		const Vertex& C=base[1];
		Vertex& P=base[0];
		//Vector AB = B-A;
		//Vector AC = C-A;
		//Vector AP = P-A;
		float AC_x=C.x-A.x,AC_y=C.y-A.y,AC_z=C.z-A.z,
			AB_x=B.x-A.x,AB_y=B.y-A.y,AB_z=B.z-A.z,
			AP_x=P.x-A.x,AP_y=P.y-A.y;

		float P_y = P.y, P_x = P.x, A_x = A.x, A_y = A.y, A_z = A.z;

		float AB_v=B.v-A.v,AB_u=B.u-A.u,
			AC_v=C.v-A.v,AC_u=C.u-A.u;

		float /*P_v,P_u,*/A_v=A.v,A_u=A.u;

		float k3 = (AC_x * AB_y - AC_y * AB_x);

		if (k3 == 0)
		{
			//throw new Exception("WTF?!");
		}

		float k2 = (AP_x * AB_y - AP_y * AB_x) / k3;

		float k1 = 0;

		if (AB_x == 0)
		{
			//if (AB_y == 0)
			//	;
			//    //throw new Exception("WTF?!");

			k1 = (P_y - A_y - k2 * AC_y) / AB_y;
		}
		else
		{
			k1 = (P_x - A_x - k2 * AC_x) / AB_x;
		}

		P.z = A_z + k1 * AB_z + k2 * AC_z;
		P.u = A_u + k1 * AB_u + k2 * AC_u;
		P.v = A_v + k1 * AB_v + k2 * AC_v;
	}

	static void AppendSpriteVertexB(TA_Sprite1B* sv)
	{
		if (CurrentPP == nullptr)
			return;
		vert_res_base;
		cv-=3;

		cv[1].y=sv->y2;
		cv[1].z=sv->z2;
		update_fz(sv->z2);

		cv[0].x=sv->x3;
		cv[0].y=sv->y3;


		sprite_uv(2, u0,v0);
		sprite_uv(3, u1,v1);
		sprite_uv(1, u2,v2);
		//sprite_uv(0, u0,v2);//or sprite_uv(u2,v0); ?

		CaclulateSpritePlane(cv);

		update_fz(cv[0].z);

		CurrentPPlist->push_back(*CurrentPP);
		PolyParam *d_pp = &CurrentPPlist->back();
		CurrentPP = d_pp;
		d_pp->first = vd_rc.verts.size();
		d_pp->count = 0;
	}

	// Modifier Volumes Vertex handlers
	
	static void StartModVol(TA_ModVolParam* param)
	{
		endModVol();

		ModifierVolumeParam *p = NULL;
		if (CurrentList == ListType_Opaque_Modifier_Volume)
		{
			vd_rc.global_param_mvo.emplace_back();
			p = &vd_rc.global_param_mvo.back();
		}
		else if (CurrentList == ListType_Translucent_Modifier_Volume)
		{
			vd_rc.global_param_mvo_tr.emplace_back();
			p = &vd_rc.global_param_mvo_tr.back();
		}
		else
			return;
		p->init();
		p->isp.full = param->isp.full;
		p->isp.VolumeLast = param->pcw.Volume != 0;
		p->first = vd_rc.modtrig.size();
		p->tileclip = tileclip_val;
	}

	static void AppendModVolVertexA(TA_ModVolA* mvv)
	{
		if (CurrentList != ListType_Opaque_Modifier_Volume && CurrentList != ListType_Translucent_Modifier_Volume)
			return;
		vd_rc.modtrig.emplace_back();
		lmr = &vd_rc.modtrig.back();

		lmr->x0=mvv->x0;
		lmr->y0=mvv->y0;
		lmr->z0=mvv->z0;
		//update_fz(mvv->z0);

		lmr->x1=mvv->x1;
		lmr->y1=mvv->y1;
		lmr->z1=mvv->z1;
		//update_fz(mvv->z1);

		lmr->x2=mvv->x2;
	}

	static void AppendModVolVertexB(TA_ModVolB* mvv)
	{
		if (CurrentList != ListType_Opaque_Modifier_Volume && CurrentList != ListType_Translucent_Modifier_Volume)
			return;
		lmr->y2=mvv->y2;
		lmr->z2=mvv->z2;
		//update_fz(mvv->z2);
	}
};

static void getRegionTileClipping(u32& xmin, u32& xmax, u32& ymin, u32& ymax);
static void getRegionSettings(int passNumber, RenderPass& pass);

static void parseRenderPass(RenderPass& pass, const RenderPass& previousPass, rend_context& ctx, bool primRestart)
{
	const bool perPixel = config::RendererType == RenderType::OpenGL_OIT
			|| config::RendererType == RenderType::DirectX11_OIT
			|| config::RendererType == RenderType::Vulkan_OIT;
	const bool mergeTranslucent = config::PerStripSorting || perPixel;

	if (config::RenderResolution > 480 && !config::EmulateFramebuffer && config::FixUpscaleBleedingEdge)
	{
		fix_texture_bleeding(ctx.global_param_op, previousPass.op_count, pass.op_count, ctx);
		fix_texture_bleeding(ctx.global_param_pt, previousPass.pt_count, pass.pt_count, ctx);
		fix_texture_bleeding(ctx.global_param_tr, previousPass.tr_count, pass.tr_count, ctx);
	}
	if (primRestart)
	{
		makePrimRestartIndex(ctx.global_param_op, previousPass.op_count, pass.op_count, true, ctx);
		makePrimRestartIndex(ctx.global_param_pt, previousPass.pt_count, pass.pt_count, true, ctx);
	}
	else
	{
		makeIndex(ctx.global_param_op, previousPass.op_count, pass.op_count, true, ctx);
		makeIndex(ctx.global_param_pt, previousPass.pt_count, pass.pt_count, true, ctx);
	}
	pass.sorted_tr_count = previousPass.sorted_tr_count;
	if (pass.autosort && !perPixel)
	{
		if (config::PerStripSorting)
			sortPolyParams(ctx.global_param_tr, previousPass.tr_count, pass.tr_count, ctx);
		else
			sortTriangles(ctx, pass, previousPass);
	}
	// sortTriangles already created the index
	if (!pass.autosort || perPixel || config::PerStripSorting)
	{
		if (primRestart)
			makePrimRestartIndex(ctx.global_param_tr, previousPass.tr_count, pass.tr_count, mergeTranslucent, ctx);
		else
			makeIndex(ctx.global_param_tr, previousPass.tr_count, pass.tr_count, mergeTranslucent, ctx);
	}
}

static void ta_parse_vdrc(TA_context* ctx, bool primRestart)
{
	verify(vd_ctx == nullptr);
	vd_ctx = ctx;

	ta_parse_reset();

	PolyParam *bgpp = &vd_rc.global_param_op.front();
	if (bgpp->pcw.Texture)
		bgpp->texture = renderer->GetTexture(bgpp->tsp, bgpp->tcw);

	TA_context *childCtx = ctx;
	int pass = 0;
	RenderPass previousPass{};

	while (childCtx != nullptr)
	{
		Ta_Dma* ta_data = (Ta_Dma *)childCtx->getTADataBegin();
		Ta_Dma* ta_data_end = (Ta_Dma *)childCtx->getTADataEnd();

		while (ta_data < ta_data_end)
			try {
				ta_data = BaseTAParser::TaCmd(ta_data, ta_data_end);
			} catch (const TAParserException& e) {
				break;
			}

		// Disable blending for opaque polys of the first pass
		if (pass == 0)
		{
			for (PolyParam& pp : vd_rc.global_param_op) {
				pp.tsp.DstInstr = 0;
				pp.tsp.SrcInstr = 1;
			}
		}

		bool empty_pass = vd_rc.global_param_op.size() == (pass == 0 ? 0u : (int)vd_rc.render_passes.back().op_count)
				&& vd_rc.global_param_pt.size() == (pass == 0 ? 0u : (int)vd_rc.render_passes.back().pt_count)
				&& vd_rc.global_param_tr.size() == (pass == 0 ? 0u : (int)vd_rc.render_passes.back().tr_count);

		if (pass == 0 || !empty_pass)
		{
			vd_rc.render_passes.emplace_back();
			RenderPass& render_pass = vd_rc.render_passes.back();
			getRegionSettings(pass, render_pass);
			render_pass.op_count = vd_rc.global_param_op.size();
			render_pass.pt_count = vd_rc.global_param_pt.size();
			render_pass.tr_count = vd_rc.global_param_tr.size();
			render_pass.sorted_tr_count = 0;
			render_pass.mvo_count = vd_rc.global_param_mvo.size();
			render_pass.mvo_tr_count = vd_rc.global_param_mvo_tr.size();

			parseRenderPass(render_pass, previousPass, vd_rc, primRestart);
			previousPass = render_pass;
		}
		childCtx = childCtx->nextContext;
		pass++;
	}

	u32 xmin, xmax, ymin, ymax;
	getRegionTileClipping(xmin, xmax, ymin, ymax);
	vd_rc.fb_X_CLIP.min = std::max(vd_rc.fb_X_CLIP.min, xmin);
	vd_rc.fb_X_CLIP.max = std::min(vd_rc.fb_X_CLIP.max, xmax + 31);
	vd_rc.fb_Y_CLIP.min = std::max(vd_rc.fb_Y_CLIP.min, ymin);
	vd_rc.fb_Y_CLIP.max = std::min(vd_rc.fb_Y_CLIP.max, ymax + 31);

	vd_ctx = nullptr;
}

static void ta_parse_naomi2(TA_context* ctx, bool primRestart)
{
	for (PolyParam& pp : ctx->rend.global_param_op)
	{
		if (pp.pcw.Texture)
			pp.texture = renderer->GetTexture(pp.tsp, pp.tcw);
		if (pp.tsp1.full != (u32)-1)
			pp.texture1 = renderer->GetTexture(pp.tsp1, pp.tcw1);
	}
	for (PolyParam& pp : ctx->rend.global_param_pt)
	{
		if (pp.pcw.Texture)
			pp.texture = renderer->GetTexture(pp.tsp, pp.tcw);
		if (pp.tsp1.full != (u32)-1)
			pp.texture1 = renderer->GetTexture(pp.tsp1, pp.tcw1);
	}
	for (PolyParam& pp : ctx->rend.global_param_tr)
	{
		if (pp.pcw.Texture)
			pp.texture = renderer->GetTexture(pp.tsp, pp.tcw);
		if (pp.tsp1.full != (u32)-1)
			pp.texture1 = renderer->GetTexture(pp.tsp1, pp.tcw1);
	}

	ctx->rend.newRenderPass();
	RenderPass previousPass{};

	for (RenderPass& pass : ctx->rend.render_passes)
	{
		parseRenderPass(pass, previousPass, ctx->rend, primRestart);
		// Disable blending for opaque polys of the first pass
		if (&pass == &ctx->rend.render_passes[0])
		{
			for (PolyParam& pp : ctx->rend.global_param_op) {
				pp.tsp.DstInstr = 0;
				pp.tsp.SrcInstr = 1;
			}
		}
		previousPass = pass;
	}

	u32 xmin, xmax, ymin, ymax;
	getRegionTileClipping(xmin, xmax, ymin, ymax);
	ctx->rend.fb_X_CLIP.min = std::max(ctx->rend.fb_X_CLIP.min, xmin);
	ctx->rend.fb_X_CLIP.max = std::min(ctx->rend.fb_X_CLIP.max, xmax + 31);
	ctx->rend.fb_Y_CLIP.min = std::max(ctx->rend.fb_Y_CLIP.min, ymin);
	ctx->rend.fb_Y_CLIP.max = std::min(ctx->rend.fb_Y_CLIP.max, ymax + 31);
}

void ta_parse(TA_context *ctx, bool primRestart)
{
	if (settings.platform.isNaomi2())
		ta_parse_naomi2(ctx, primRestart);
	else
		ta_parse_vdrc(ctx, primRestart);
}

//
// Naomi 2 stuff
//
static PolyParam *n2CurrentPP;
static ModifierVolumeParam *n2CurrentMVP;

const float identityMat[] {
	1.f, 0.f, 0.f, 0.f,
	0.f, 1.f, 0.f, 0.f,
	0.f, 0.f, 1.f, 0.f,
	0.f, 0.f, 0.f, 1.f
};

constexpr int IdentityMatIndex = 0;
constexpr int NoLightIndex = 0;

static void setDefaultMatrices()
{
	if (ta_ctx->rend.matrices.empty())
		ta_ctx->rend.matrices.push_back(*(N2Matrix *)identityMat);
}

static void setDefaultLight()
{
	if (ta_ctx->rend.lightModels.empty())
		ta_ctx->rend.lightModels.emplace_back();
}

void ta_add_poly(const PolyParam& pp)
{
	verify(ta_ctx != nullptr);
	verify(vd_ctx == nullptr);
	vd_ctx = ta_ctx;
	BaseTAParser::startList(pp.pcw.ListType);

	BaseTAParser::CurrentPPlist->push_back(pp);
	BaseTAParser::CurrentPP = nullptr; // might be invalidated
	n2CurrentPP = &BaseTAParser::CurrentPPlist->back();
	n2CurrentPP->first = ta_ctx->rend.verts.size();
	n2CurrentPP->count = 0;
	n2CurrentPP->tileclip = BaseTAParser::getTileClip();
	setDefaultMatrices();
	if (n2CurrentPP->mvMatrix == -1)
		n2CurrentPP->mvMatrix = IdentityMatIndex;
	if (n2CurrentPP->normalMatrix == -1)
		n2CurrentPP->normalMatrix = IdentityMatIndex;
	setDefaultLight();
	if (n2CurrentPP->lightModel == -1)
		n2CurrentPP->lightModel = NoLightIndex;
	vd_ctx = nullptr;
}

void ta_add_poly(int listType, const ModifierVolumeParam& mvp)
{
	verify(ta_ctx != nullptr);
	verify(vd_ctx == nullptr);
	vd_ctx = ta_ctx;
	BaseTAParser::startList(listType);

	switch (BaseTAParser::getCurrentList())
	{
	case ListType_Opaque_Modifier_Volume:
		ta_ctx->rend.global_param_mvo.push_back(mvp);
		n2CurrentMVP = &ta_ctx->rend.global_param_mvo.back();
		break;
	case ListType_Translucent_Modifier_Volume:
		ta_ctx->rend.global_param_mvo_tr.push_back(mvp);
		n2CurrentMVP = &ta_ctx->rend.global_param_mvo_tr.back();
		break;
	default:
		die("wrong list type");
		break;
	}
	n2CurrentMVP->first = ta_ctx->rend.modtrig.size();
	n2CurrentMVP->count = 0;
	setDefaultMatrices();
	if (n2CurrentMVP->mvMatrix == -1)
		n2CurrentMVP->mvMatrix = IdentityMatIndex;
	vd_ctx = nullptr;
}

void ta_add_vertex(const Vertex& vtx)
{
	ta_ctx->rend.verts.push_back(vtx);
	n2CurrentPP->count++;
}

void ta_add_triangle(const ModTriangle& tri)
{
	ta_ctx->rend.modtrig.push_back(tri);
	n2CurrentMVP->count++;
}

int ta_add_matrix(const float *matrix)
{
	setDefaultMatrices();
	ta_ctx->rend.matrices.push_back(*(N2Matrix *)matrix);
	return ta_ctx->rend.matrices.size() - 1;
}

int ta_add_light(const N2LightModel& light)
{
	setDefaultLight();
	ta_ctx->rend.lightModels.push_back(light);
	return ta_ctx->rend.lightModels.size() - 1;
}

u32 ta_add_ta_data(u32 *data, u32 size)
{
	verify(vd_ctx == nullptr);
	vd_ctx = ta_ctx;
	BaseTAParser::fetchTextures = false;

	Ta_Dma *ta_data = (Ta_Dma *)data;
	Ta_Dma *ta_data_end = (Ta_Dma *)(data + size / 4);
	try {
		ta_data = BaseTAParser::TaCmd(ta_data, ta_data_end);
	} catch (const FlycastException& e) {
		vd_ctx = nullptr;
		BaseTAParser::fetchTextures = true;
		throw;
	}

	vd_ctx = nullptr;
	BaseTAParser::fetchTextures = true;

	return (u8 *)ta_data - (u8 *)data;
}

u32 ta_get_tileclip() {
	return BaseTAParser::getTileClip();
}

void ta_set_tileclip(u32 tileclip) {
	BaseTAParser::setTileClip(tileclip);
}

u32 ta_get_list_type() {
	return BaseTAParser::getCurrentList();
}

void ta_set_list_type(u32 listType)
{
	verify(vd_ctx == nullptr);
	vd_ctx = ta_ctx;
	BaseTAParser::endList();
	if (listType != ListType_None)
		BaseTAParser::startList(listType);
	vd_ctx = nullptr;
}

//
// end Naomi 2
//

void ta_parse_reset()
{
	using TAParser = TAParserTempl<>;
	using TAParserDX = TAParserTempl<2, 1, 0, 3>;

	if (isDirectX(config::RendererType))
		TAParserDX::reset();
	else
		TAParser::reset();
}

//decode a vertex in the native pvr format
//used for bg poly
template<int Red, int Green, int Blue, int Alpha>
void decode_pvr_vertex(u32 base, u32 ptr, Vertex* cv)
{
	//ISP
	//TSP
	//TCW
	ISP_TSP isp;
	isp.full = pvr_read32p<u32>(base);

	//XYZ
	//UV
	//Base Col
	//Offset Col

	//XYZ are _always_ there :)
	cv->x = pvr_read32p<float>(ptr);
	ptr += 4;
	cv->y = pvr_read32p<float>(ptr);
	ptr += 4;
	cv->z = pvr_read32p<float>(ptr);
	ptr += 4;

	if (isp.Texture)
	{	//Do texture , if any
		if (isp.UV_16b)
		{
			u32 uv = pvr_read32p<u32>(ptr);
			cv->u = f16((u16)uv);
			cv->v = f16((u16)(uv >> 16));
			ptr+=4;
		}
		else
		{
			cv->u = pvr_read32p<float>(ptr);
			ptr += 4;
			cv->v = pvr_read32p<float>(ptr);
			ptr += 4;
		}
	}

	//Color
	u32 col = pvr_read32p<u32>(ptr);
	ptr += 4;
	vert_packed_color_(cv->col, col);
	if (isp.Offset)
	{
		//Intensity color (can be missing too ;p)
		u32 col = pvr_read32p<u32>(ptr);
		ptr += 4;
		vert_packed_color_(cv->spc, col);
	}
}

static u8 float_to_satu8_math(float val)
{
	return (u8)(val == val ? std::min(1.f, std::max(0.f, val)) * 255.f : 255.f);
}

static void vtxdec_init()
{
	/*
		0x3b80 ~ 0x3f80 -> actual useful range. Rest is clamping to 0 or 255 ~
	*/

	for (u32 i = 0; i < std::size(f32_su8_tbl); i++)
	{
		u32 fr = i << 16;
		
		f32_su8_tbl[i] = float_to_satu8_math((f32&)fr);
	}
}
static OnLoad ol_vtxdec(&vtxdec_init);

void FillBGP(TA_context* ctx)
{
	// Background polygon handling
	PolyParam *bgpp = &ctx->rend.global_param_op[0];
	Vertex *cv = &ctx->rend.verts[0];

	//Get the strip base
	const u32 param_base = PARAM_BASE & 0xF00000;
	const u32 strip_base = (param_base + ISP_BACKGND_T.tag_address * 4) & VRAM_MASK;

	//Calculate the vertex size
	u32 strip_vs = 3 + ISP_BACKGND_T.skip;
	if (FPU_SHAD_SCALE.intensity_shadow == 1 && ISP_BACKGND_T.shadow == 1)
		strip_vs += ISP_BACKGND_T.skip; // 2x the size needed
	strip_vs *= 4;

	//Get vertex ptr
	const u32 strip_vert_num = ISP_BACKGND_T.tag_offset;
	u32 vertex_ptr = strip_vert_num * strip_vs + strip_base + 3 * 4;

	bgpp->isp.full = pvr_read32p<u32>(strip_base);
	bgpp->tsp.full = pvr_read32p<u32>(strip_base + 4);
	bgpp->tcw.full = pvr_read32p<u32>(strip_base + 8);
	bgpp->count = 4;
	bgpp->first = 0;
	bgpp->tileclip = 0; // disabled

	bgpp->isp.DepthMode = 7;
	bgpp->isp.CullMode = 0;// -> so that its not culled, or somehow else hidden !
	bgpp->pcw.UV_16bit = bgpp->isp.UV_16b;
	bgpp->pcw.Gouraud = bgpp->isp.Gouraud;
	bgpp->pcw.Offset = bgpp->isp.Offset;
	bgpp->pcw.Texture = bgpp->isp.Texture;
	bgpp->pcw.Shadow = ISP_BACKGND_T.shadow;

	for (int i = 0; i < 3; i++)
	{
		if (isDirectX(config::RendererType))
			decode_pvr_vertex<2, 1, 0, 3>(strip_base, vertex_ptr, &cv[i]);
		else
			decode_pvr_vertex<0, 1, 2, 3>(strip_base, vertex_ptr, &cv[i]);
		vertex_ptr += strip_vs;
	}

	// Apply a negative 1e-6 bias since the background plane is clipping too much
	// (Fixes Xtreme Sports, Blue Stinger (JP) and many WinCE games using yuv FMV)
	float bg_depth = std::max(ISP_BACKGND_D.f - 1e-6f, 1e-11f);
	cv[0].z = bg_depth;
	cv[1].z = bg_depth;
	cv[2].z = bg_depth;

	float scale_x = SCALER_CTL.hscale == 1 ? 2.f : 1.f;
	if (bgpp->pcw.Texture == 0)
	{
		cv[0].x = -256.f * scale_x;
		cv[0].y = 0.f;

		cv[1].x = 896.f * scale_x;
		cv[1].y = 0.f;

		cv[2].x = cv[0].x;
		cv[2].y = 480.f;

		cv[3] = cv[2];
		cv[3].x = cv[1].x;
	}
	else
	{
		if (cv[2].x == cv[1].x) {
			cv[2].x = cv[0].x;
			cv[2].u = cv[0].u;
		}
		const float deltaU = (cv[1].u - cv[0].u) * 0.4f;
		cv[0].x -= 256.f;
		cv[0].u -= deltaU;
		cv[1].x += 256.f;
		cv[1].u += deltaU;
		cv[2].x -= 256.f;
		cv[2].u -= deltaU;

		cv[0].x *= scale_x;
		cv[1].x *= scale_x;
		cv[2].x *= scale_x;

		cv[3] = cv[2];
		cv[3].x = cv[1].x;
		cv[3].u = cv[1].u;
	}
}

static void getRegionTileClipping(u32& xmin, u32& xmax, u32& ymin, u32& ymax)
{
	xmin = 20;
	xmax = 0;
	ymin = 15;
	ymax = 0;

	u32 addr;
	u32 tile_size;
	getRegionTileAddrAndSize(addr, tile_size);

	RegionArrayTile tile;
	int maxTiles = 3000;
	do {
		tile.full = pvr_read32p<u32>(addr);
		xmin = std::min(xmin, tile.X);
		xmax = std::max(xmax, tile.X);
		ymin = std::min(ymin, tile.Y);
		ymax = std::max(ymax, tile.Y);
		addr += tile_size;
	} while (!tile.LastRegion && --maxTiles >= 0);
	if (maxTiles < 0)
		WARN_LOG(PVR, "getRegionTileClipping overflow");

	xmin *= 32;
	xmax *= 32;
	ymin *= 32;
	ymax *= 32;
}

static void getRegionSettings(int passNumber, RenderPass& pass)
{
	u32 addr;
	u32 tileSize;
	getRegionTileAddrAndSize(addr, tileSize);
	addr += passNumber * tileSize;
	RegionArrayTile tile;
	tile.full = pvr_read32p<u32>(addr);

	if (((FPU_PARAM_CFG >> 21) & 1) == 0)
		// Type 1 region header type
		pass.autosort = (ISP_FEED_CFG & 1) == 0;
	else
		// Type 2
		pass.autosort = !tile.PreSort;
	pass.z_clear = !tile.NoZClear;
	pass.mv_op_tr_shared = pvr_read32p<u32>(addr + 8) == pvr_read32p<u32>(addr + 16);
}

void rend_context::newRenderPass()
{
	RenderPass pass;
	pass.op_count = global_param_op.size();
	pass.tr_count = global_param_tr.size();
	pass.pt_count = global_param_pt.size();
	pass.mvo_count = global_param_mvo.size();
	pass.mvo_tr_count = global_param_mvo_tr.size();
	pass.sorted_tr_count = 0;
	getRegionSettings(render_passes.size(), pass);
	render_passes.push_back(pass);
}