//===========================================================================//
// Copyright (C) Microsoft Corporation. All rights reserved.                 //
//===========================================================================//

#pragma once
#define MLR_GOSVERTEX_HPP

#include <MLR\MLR.hpp>
#include <Stuff\Scalar.hpp>
#include <GameOS.hpp>

namespace MidLevelRenderer {

	//##########################################################################
	//####################    GOSVertex    ##############################
	//##########################################################################

	class GOSVertex :
		public gos_VERTEX
	{
	public:
		GOSVertex();

		static Stuff::Scalar
			farClipReciprocal;

		inline GOSVertex&
			operator=(const GOSVertex& V)
				{
					Check_Pointer(this);

					x = V.x;
					y = V.y;
					z = V.z;
					rhw = V.rhw;
					argb = V.argb;
					frgb = V.frgb;
					u = V.u;
					v = V.v;

					return *this;
				};

		inline GOSVertex&
			operator=(const Stuff::Vector4D& v)
				{
					Check_Pointer(this);

					Verify(!Stuff::Small_Enough(v.w));

//					Tell_Value(v);

					rhw = 1.0f / v.w;

					x = v.x * rhw;
					Verify(x>=0.0f && x<=1.0f);

					y = v.y * rhw;
					Verify(y>=0.0f && y<=1.0f);

					z = v.z * rhw;
					Verify(z>=0.0f && z<1.0f);

					return *this;
				}

		inline GOSVertex&
			operator=(const Stuff::RGBAColor& c)
				{
					Check_Pointer(this);

//					DEBUG_STREAM << "c = <" << c.alpha << ", " << c.red << ", ";
//					DEBUG_STREAM << c.green << ", " << c.blue << ">" << endl;

					float f;
					f = c.alpha * 255.99f;
					Clamp(f, 0.0f, 255.f);
					argb = Stuff::Round_Float_To_Byte (f);

					f = c.red * 255.99f;
					Clamp(f, 0.0f, 255.f);
					argb = (argb << 8) | Stuff::Round_Float_To_Byte (f);

					f = c.green * 255.99f;
					Clamp(f, 0.0f, 255.f);
					argb = (argb << 8) | Stuff::Round_Float_To_Byte (f);

					f = c.blue * 255.99f;
					Clamp(f, 0.0f, 255.f);
					argb = (argb << 8) | Stuff::Round_Float_To_Byte (f);

//					DEBUG_STREAM << "0x" << hex << argb << dec << endl;

					return *this;
				}

		inline GOSVertex&
			operator=(const DWORD c)
				{
					Check_Pointer(this);

					argb = c;

					return *this;
				}

		inline GOSVertex&
			operator=(const Stuff::Vector2DOf<Stuff::Scalar>& uv)
				{
					Check_Pointer(this);

					u = uv[0];
					v = uv[1];

					return *this;
				}

		inline void
			GOSTransformNoClip(
				const Stuff::Point3D &v,
				const Stuff::Matrix4D &m,
				Stuff::Scalar *uv
#if FOG_HACK
				, int foggy
#endif
			);

#if FOG_HACK
		static BYTE	GOSVertex::fogTable[Limits::Max_Number_Of_FogStates][1024];

		static void
			SetFogTableEntry(int entry, Stuff::Scalar fogNearClip, Stuff::Scalar fogFarClip, Stuff::Scalar fogDensity);
#endif

	protected:
	};

	struct ViewportScalars
	{
		static Stuff::Scalar MulX;
		static Stuff::Scalar MulY;
		static Stuff::Scalar AddX;
		static Stuff::Scalar AddY;
	};

	typedef Stuff::Vector2DOf<Stuff::Scalar> Vector2DScalar;
	
	const float float_cheat = 12582912.0f/256.0f;
	const float One_Over_256 = 1.0f/256.0f;

	#pragma warning (disable : 4725)

void
	GOSVertex::GOSTransformNoClip(
		const Stuff::Point3D &_v,
		const Stuff::Matrix4D &m,
		Stuff::Scalar *uv
#if FOG_HACK
				, int foggy
#endif
	)
{
	Check_Pointer(this);
	Check_Object(&_v);
	Check_Object(&m);

#if USE_ASSEMBLER_CODE
	Stuff::Scalar *f = &x;
	_asm {
		mov         edx, m
		
		mov         eax, _v

		fld			dword ptr [eax]			//	v.x
		fld			dword ptr [eax+4]		//	v.y
		fld			dword ptr [eax+8]		//	v.z

		mov         eax, f

		fld         dword ptr [edx+34h]		//	m[1][3]
		fmul        st, st(2)				//	v.y
		
		fld         dword ptr [edx+38h]		//	m[2][3]
		fmul        st, st(2)				//	v.z

		fxch		st(1)
		fadd        dword ptr [edx+3Ch]		//	m[3][3]
		
		fld         dword ptr [edx+30h]		//	m[0][3]
		fmul        st, st(5)				//	v.x

		fxch		st(2)
		faddp       st(1),st

		fld         dword ptr [edx+14h]		//	m[1][1]
		fmul        st, st(4)				//	v.y

		fxch		st(2)
		faddp       st(1),st

		fld         dword ptr [edx+18h]		//	m[2][1]
		fmul        st, st(3)				//	v.z
		
		fxch		st(1)
		fstp        dword ptr [eax+0Ch]		//	w

		fadd        dword ptr [edx+1Ch]		//	m[3][1]

		fld         dword ptr [edx+10h]		//	m[0][1]
		fmul        st, st(5)				//	v.x

		fxch		st(2)
		faddp       st(1),st

		fld         dword ptr [edx+24h]		//	m[1][2]
		fmul        st, st(4)				//	v.y

		fxch		st(2)
		faddp       st(1),st

		fld         dword ptr [edx+28h]		//	m[2][2]
		fmul        st, st(3)				//	v.z
		
		fxch		st(1)
		fstp        dword ptr [eax+4]		//	y

		fadd        dword ptr [edx+2Ch]		//	m[3][2]
		
		fld         dword ptr [edx+20h]		//	m[0][2]
		fmul        st, st(5)				//	v.x

		fxch		st(2)
		faddp       st(1),st

		fld         dword ptr [edx+4]		//	m[1][0]
		fmul        st, st(4)				//	v.y

		fxch		st(2)
		faddp       st(1),st

		fld         dword ptr [edx+8]		//	m[2][0]
		fmul        st, st(3)				//	v.z

		fxch		st(1)
		fstp        dword ptr [eax+8]		//	z

		fadd        dword ptr [edx+0Ch]		//	m[3][0]
		
		fld         dword ptr [edx]			//	m[0][0]
		fmul        st, st(5)				//	v.x
		
		fxch		st(2)
		faddp       st(1),st

		faddp       st(1),st

//		fld1

//		fdivrp		st(1),st

//	get rid of x, y, z
		fstp		st(1)
		fstp		st(1)
		fstp		st(1)

		fstp        dword ptr [eax]			//	x

	}
#else
	x = v.x*m(0,0) + v.y*m(1,0) + v.z*m(2,0) + m(3,0);
	y = v.x*m(0,1) + v.y*m(1,1) + v.z*m(2,1) + m(3,1);
	z = v.x*m(0,2) + v.y*m(1,2) + v.z*m(2,2) + m(3,2);
	rhw = v.x*m(0,3) + v.y*m(1,3) + v.z*m(2,3) + m(3,3);
#endif
	
#if 0	//USE_ASSEMBLER_CODE
	_asm {
;		gos_vertices[0].w = 1.0f/coords[offset].w;

		mov         ecx, f
		fld1

		fdiv        dword ptr [ecx+0Ch]

		fst			dword ptr [ecx+0Ch]

;		gos_vertices[0].x = coords[offset].x * gos_vertices[0].w;
		fld         st(0)
		fmul        dword ptr [ecx]
		fstp        dword ptr [ecx]

;		gos_vertices[0].y = coords[offset].y * gos_vertices[0].w;
		fld         dword ptr [ecx+4]
		fmul        st,st(1)
		fstp        dword ptr [ecx+4]
;		gos_vertices[0].z = coords[offset].z * gos_vertices[0].w;

;		fld         dword ptr [ecx+8]
		fmul        dword ptr [ecx+8]

		fstp        dword ptr [ecx+8]
;		fstp        st(0)
	}
#else
#if FOG_HACK
	if(foggy)
	{
		*((BYTE *)&frgb + 3) =
			fogTable[foggy-1][Stuff::Truncate_Float_To_Word(rhw)];
	}
	else
	{
		*((BYTE *)&frgb + 3) = 0xff;
	}
#endif

	rhw = 1.0f/rhw;

	Verify(	MLRState::GetHasMaxUVs() ? (uv[0]<MLRState::GetMaxUV() && uv[0]>-MLRState::GetMaxUV()) : 1 );
	Verify(	MLRState::GetHasMaxUVs() ? (uv[1]<MLRState::GetMaxUV() && uv[1]>-MLRState::GetMaxUV()) : 1 );

	u = uv[0];
	v = uv[1];

	x = x * rhw;
	y = y * rhw;
	z = z * rhw;
#endif

	Verify(rhw > Stuff::SMALL);

	Verify(x >= 0.0f);
	Verify(y >= 0.0f);
	Verify(z >= 0.0f);
		
	Verify(x <= 1.0f);
	Verify(y <= 1.0f);
	Verify(z < 1.0f);

	x = x*ViewportScalars::MulX + ViewportScalars::AddX;
	y = y*ViewportScalars::MulY + ViewportScalars::AddY;
}

//	create a dword color out of 4 rgba floats
	inline DWORD
		GOSCopyColor( const Stuff::RGBAColor *color )
	{
		Stuff::Scalar f;
#if USE_ASSEMBLER_CODE
		DWORD argb;

		_asm {
			fld		float_cheat

			mov		esi, dword ptr [color]

			fld		dword ptr [esi + 0Ch]

			mov		ecx, dword ptr [esi + 0Ch]

			fadd	st, st(1)

			rcl		ecx, 1
			sbb		eax, eax
			xor		eax, -1

			fstp	f
			xor		ecx, ecx

			mov		ebx, f
			and		ebx, eax

			test	ebx, 0000ff00h

			seta	cl

			xor		eax, eax
			sub		eax, ecx

			or		ebx, eax
			and		ebx, 000000ffh

			mov		argb, ebx

			fld		dword ptr [esi]

			mov		ecx, dword ptr [esi]

			fadd	st, st(1)
			rcl		ecx, 1
			sbb		eax, eax
			xor		eax, -1

			fstp	f
			xor		ecx, ecx

			mov		ebx, f
			and		ebx, eax

			test	ebx, 0000ff00h

			seta	cl

			xor		eax, eax
			sub		eax, ecx

			or		ebx, eax
			and		ebx, 000000ffh

			mov		ecx, argb
			shl		ecx, 8

			or		ecx, ebx
			mov		argb, ecx

			fld		dword ptr [esi+4]

			mov		ecx, dword ptr [esi+4]

			fadd	st, st(1)
			rcl		ecx, 1
			sbb		eax, eax
			xor		eax, -1

			fstp	f
			xor		ecx, ecx

			mov		ebx, f
			and		ebx, eax

			test	ebx, 0000ff00h

			seta	cl

			xor		eax, eax
			sub		eax, ecx

			or		ebx, eax
			and		ebx, 000000ffh

			mov		ecx, argb
			shl		ecx, 8

			or		ecx, ebx
			mov		argb, ecx

;			fld		dword ptr [esi+8]

			mov		ecx, dword ptr [esi+8]

			fadd	dword ptr [esi+8]
			rcl		ecx, 1
			sbb		eax, eax
			xor		eax, -1

			fstp	f
			xor		ecx, ecx

			mov		ebx, f
			and		ebx, eax

			test	ebx, 0000ff00h

			seta	cl

			xor		eax, eax
			sub		eax, ecx

			or		ebx, eax
			and		ebx, 000000ffh

			mov		ecx, argb
			shl		ecx, 8

			or		ecx, ebx
			mov		argb, ecx
		}

#else
		f = color->alpha * 255.99f;
		Clamp(f, 0.0f, 255.f);
		argb = Stuff::Positive_Float_To_Byte (f);

		f = colors->red * 255.99f;
		Clamp(f, 0.0f, 255.f);
		argb = (gos_vertices[0].argb << 8) | Stuff::Positive_Float_To_Byte (f);

		f = colors->green * 255.99f;
		Clamp(f, 0.0f, 255.f);
		argb = (gos_vertices[0].argb << 8) | Stuff::Positive_Float_To_Byte (f);

		f = colors->blue * 255.99f;
		Clamp(f, 0.0f, 255.f);
		argb = (gos_vertices[0].argb << 8) | Stuff::Positive_Float_To_Byte (f);

#endif
		return argb;
	}

	inline DWORD
		Color_DWORD_Lerp (
			DWORD _from,
			DWORD _to,
			Stuff::Scalar _lerp
		)
	{
		Stuff::RGBAColor from, to, lerp;

		from.blue = (_from & 0xff) * One_Over_256;

		_from = _from>>8;

		from.green = (_from & 0xff) * One_Over_256;

		_from = _from>>8;

		from.red = (_from & 0xff) * One_Over_256;

		_from = _from>>8;

		from.alpha = (_from & 0xff) * One_Over_256;

// ====

		to.blue = (_to & 0xff) * One_Over_256;

		_to = _to>>8;

		to.green = (_to & 0xff) * One_Over_256;

		_to = _to>>8;

		to.red = (_to & 0xff) * One_Over_256;

		_to = _to>>8;

		to.alpha = (_to & 0xff) * One_Over_256;

		lerp.Lerp(from, to, _lerp);

		return GOSCopyColor(&lerp);
	}


	//######################################################################################################################
	//	the lines below will produce following functions:
	//
	//	bool GOSCopyData(GOSVertex*, const Stuff::Vector4D*, int);
	//	bool GOSCopyData(GOSVertex*, const Stuff::Vector4D*, const DWORD*, int);
	//	bool GOSCopyData(GOSVertex*, const Stuff::Vector4D*, const RGBAColor*, int);
	//	bool GOSCopyData(GOSVertex*, const Stuff::Vector4D*, const Vector2DScalar*, int);
	//	bool GOSCopyData(GOSVertex*, const Stuff::Vector4D*, const DWORD*, const Vector2DScalar*, int);
	//	bool GOSCopyData(GOSVertex*, const Stuff::Vector4D*, const RGBAColor*, const Vector2DScalar*, int);
	//
	//	bool GOSCopyTriangleData(GOSVertex*, const Stuff::Vector4D*, int, int, int);
	//	bool GOSCopyTriangleData(GOSVertex*, const Stuff::Vector4D*, const DWORD*, int, int, int);
	//	bool GOSCopyTriangleData(GOSVertex*, const Stuff::Vector4D*, const RGBAColor*, int, int, int);
	//	bool GOSCopyTriangleData(GOSVertex*, const Stuff::Vector4D*, const Vector2DScalar*, int, int, int);
	//	bool GOSCopyTriangleData(GOSVertex*, const Stuff::Vector4D*, const DWORD*, const Vector2DScalar*, int, int, int);
	//	bool GOSCopyTriangleData(GOSVertex*, const Stuff::Vector4D*, const RGBAColor*, const Vector2DScalar*, int, int, int);
	//#######################################################################################################################

	#define I_SAY_YES_TO_COLOR
	#define I_SAY_YES_TO_TEXTURE
	#define I_SAY_YES_TO_DWORD_COLOR
	#include <MLR\GOSVertexManipulation.hpp>

	#undef I_SAY_YES_TO_DWORD_COLOR
	#include <MLR\GOSVertexManipulation.hpp>

	#undef I_SAY_YES_TO_COLOR
	#include <MLR\GOSVertexManipulation.hpp>

	#define I_SAY_YES_TO_COLOR
	#undef I_SAY_YES_TO_TEXTURE
	#include <MLR\GOSVertexManipulation.hpp>

	#define I_SAY_YES_TO_DWORD_COLOR
	#include <MLR\GOSVertexManipulation.hpp>

	#undef I_SAY_YES_TO_COLOR
	#include <MLR\GOSVertexManipulation.hpp>

	#define MLR_GOSVERTEXMANIPULATION_HPP

}