/*============================  ==============================================;
 *
 *  Copyright (C) 1998 Microsoft Corporation.  All Rights Reserved.
 *
 *  File:       pvvid.mcp
 *  Content:    The implementation of the geometry inner loop
 *
 ***************************************************************************/

#include "pch.cpp"
#pragma hdrstop

#define DEBUG_PIPELINE

#include "light.h"
#include "clipper.h"
#include "drawprim.hpp"
#include "pvvid.h"
include(`pvvid.mh') dnl

#ifdef DEBUG_PIPELINE

DWORD g_DebugFlags = 0;

#endif // DEBUG_PIPELINE

//--------------------------------------------------------------------------
// Input:
//      v    - input vertex in the model space
//      le   - vertex, transformed to the camera space
// Output:
//      Alpha component of pv->lighting.outSpecular is set
//
void ComputeFog(LPD3DFE_PROCESSVERTICES pv, D3DVECTOR &v, D3DLIGHTINGELEMENT *le)
{
    D3DVALUE dist;
    if (pv->lighting.dwLightingFlags & __LIGHT_VERTEXTRANSFORMED)
    {
        // Vertex is already transformed to the camera space
        if (pv->dwDeviceFlags & D3DDEV_RANGEBASEDFOG)
            dist = SQRTF(le->dvPosition.x*le->dvPosition.x + 
                         le->dvPosition.y*le->dvPosition.y + 
                         le->dvPosition.z*le->dvPosition.z);
        else
            dist = le->dvPosition.z;
    }
    else
    if (pv->dwDeviceFlags & D3DDEV_RANGEBASEDFOG)
    {
        D3DVECTOR veye;
        d_TransformVertexToCameraSpace(2, (&v), (&veye));
        dist = SQRTF(veye.x*veye.x + veye.y*veye.y + veye.z*veye.z);
    }
    else
    {
        if (pv->dwNumVerBlends == 0)
        {
	        dist = v.x*pv->mWV._13 + v.y*pv->mWV._23 + v.z*pv->mWV._33 + pv->mWV._43;
        }
        else
        {
            D3DVECTOR veye;
            d_TransformVertexToCameraSpace(2, (&v), (&veye));
            dist = veye.z;
        }
    }
    ComputeFogFactor(pv, dist, &pv->lighting.outSpecular);
}
//---------------------------------------------------------------------
// Transform 1-dimensional texture
//
void TransformTexture1_1Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + m->_21;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 1-dimensional texture. Output 2 texture coordinates
//
void TransformTexture1_2Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + m->_21;
        pOut[1] = pIn[0] * m->_12 + m->_22;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 1-dimensional texture. Output 3 texture coordinates
//
void TransformTexture1_3Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + m->_21;
        pOut[1] = pIn[0] * m->_12 + m->_22;
        pOut[2] = pIn[0] * m->_13 + m->_23;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 1-dimensional texture. Output 4 texture coordinates
//
void TransformTexture1_4Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + m->_21;
        pOut[1] = pIn[0] * m->_12 + m->_22;
        pOut[2] = pIn[0] * m->_13 + m->_23;
        pOut[3] = pIn[0] * m->_14 + m->_24;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 2-dimensional texture
//
void TransformTexture2_2Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + m->_31;
        pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + m->_32;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 2-dimensional texture. Output 1 texture coordinate
//
void TransformTexture2_1Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + m->_31;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 2-dimensional texture. Output 3 texture coordinate
//
void TransformTexture2_3Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + m->_31;
        pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + m->_32;
        pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + m->_33;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 2-dimensional texture. Output 4 texture coordinate
//
void TransformTexture2_4Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + m->_31;
        pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + m->_32;
        pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + m->_33;
        pOut[3] = pIn[0] * m->_14 + pIn[1] * m->_24 + m->_34;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 3-dimensional texture
//
void TransformTexture3_3Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + m->_41;
        pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + m->_42;
        pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + pIn[2] * m->_33 + m->_43;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 3-dimensional texture. Output 1 texture coordinate
//
void TransformTexture3_1Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + m->_41;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 3-dimensional texture. Output 2 texture coordinates
//
void TransformTexture3_2Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + m->_41;
        pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + m->_42;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 3-dimensional texture. Output 4 texture coordinates
//
void TransformTexture3_4Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + m->_41;
        pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + m->_42;
        pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + pIn[2] * m->_33 + m->_43;
        pOut[3] = pIn[0] * m->_14 + pIn[1] * m->_24 + pIn[2] * m->_34 + m->_44;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 4-dimensional texture
//
void TransformTexture4_4Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + pIn[3] * m->_41;
        pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + pIn[3] * m->_42;
        pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + pIn[2] * m->_33 + pIn[3] * m->_43;
        pOut[3] = pIn[0] * m->_14 + pIn[1] * m->_24 + pIn[2] * m->_34 + pIn[3] * m->_44;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 4-dimensional texture. Output 1 texture coordinate
//
void TransformTexture4_1Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + pIn[3] * m->_41;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 4-dimensional texture. Output 2 texture coordinates
//
void TransformTexture4_2Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + pIn[3] * m->_41;
        pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + pIn[3] * m->_42;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 4-dimensional texture. Output 3 texture coordinates
//
void TransformTexture4_3Loop(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m, 
                           DWORD dwCount, 
                           DWORD dwInpStride,
                           DWORD dwOutStride)
{
    for (; dwCount; dwCount--)
    {
        pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + pIn[3] * m->_41;
        pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + pIn[3] * m->_42;
        pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + pIn[2] * m->_33 + pIn[3] * m->_43;
        pIn  = (D3DVALUE*)((BYTE*)pIn + dwInpStride);
        pOut = (D3DVALUE*)((BYTE*)pOut + dwOutStride);
    }
}
//---------------------------------------------------------------------
// Transform 1-dimensional texture. 
//
void TransformTexture1_1(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + m->_21;
}
//---------------------------------------------------------------------
// Transform 1-dimensional texture. Output 2 texture coordinates
//
void TransformTexture1_2(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + m->_21;
    pOut[1] = pIn[0] * m->_12 + m->_22;
}
//---------------------------------------------------------------------
// Transform 1-dimensional texture. Output 3 texture coordinates
//
void TransformTexture1_3(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + m->_21;
    pOut[1] = pIn[0] * m->_12 + m->_22;
    pOut[2] = pIn[0] * m->_13 + m->_23;
}
//---------------------------------------------------------------------
// Transform 1-dimensional texture. Output 4 texture coordinates
//
void TransformTexture1_4(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + m->_21;
    pOut[1] = pIn[0] * m->_12 + m->_22;
    pOut[2] = pIn[0] * m->_13 + m->_23;
    pOut[3] = pIn[0] * m->_14 + m->_24;
}
//---------------------------------------------------------------------
// Transform 2-dimensional texture
//
void TransformTexture2_2(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + m->_31;
    pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + m->_32;
}
//---------------------------------------------------------------------
// Transform 2-dimensional texture. Output 1 texture coordinate
//
void TransformTexture2_1(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + m->_31;
}
//---------------------------------------------------------------------
// Transform 2-dimensional texture. Output 3 texture coordinates
//
void TransformTexture2_3(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + m->_31;
    pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + m->_32;
    pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + m->_33;
}
//---------------------------------------------------------------------
// Transform 2-dimensional texture. Output 4 texture coordinates
//
void TransformTexture2_4(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + m->_31;
    pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + m->_32;
    pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + m->_33;
    pOut[3] = pIn[0] * m->_14 + pIn[1] * m->_24 + m->_34;
}
//---------------------------------------------------------------------
// Transform 3-dimensional texture. Output 3 texture coordinates
//
void TransformTexture3_3(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + m->_41;
    pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + m->_42;
    pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + pIn[2] * m->_33 + m->_43;
}
//---------------------------------------------------------------------
// Transform 3-dimensional texture. Output 1 texture coordinates
//
void TransformTexture3_1(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + m->_41;
}
//---------------------------------------------------------------------
// Transform 3-dimensional texture. Output 2 texture coordinates
//
void TransformTexture3_2(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + m->_41;
    pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + m->_42;
}
//---------------------------------------------------------------------
// Transform 3-dimensional texture. Output 4 texture coordinates
//
void TransformTexture3_4(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + m->_41;
    pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + m->_42;
    pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + pIn[2] * m->_33 + m->_43;
    pOut[3] = pIn[0] * m->_14 + pIn[1] * m->_24 + pIn[2] * m->_34 + m->_44;
}
//---------------------------------------------------------------------
// Transform 4-dimensional texture. Output 4 texture coordinates
//
void TransformTexture4_4(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + pIn[3] * m->_41;
    pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + pIn[3] * m->_42;
    pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + pIn[2] * m->_33 + pIn[3] * m->_43;
    pOut[3] = pIn[0] * m->_14 + pIn[1] * m->_24 + pIn[2] * m->_34 + pIn[3] * m->_44;
}
//---------------------------------------------------------------------
// Transform 4-dimensional texture. Output 1 texture coordinates
//
void TransformTexture4_1(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + pIn[3] * m->_41;
}
//---------------------------------------------------------------------
// Transform 4-dimensional texture. Output 2 texture coordinates
//
void TransformTexture4_2(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + pIn[3] * m->_41;
    pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + pIn[3] * m->_42;
}
//---------------------------------------------------------------------
// Transform 4-dimensional texture. Output 3 texture coordinates
//
void TransformTexture4_3(D3DVALUE *pIn, D3DVALUE *pOut, D3DMATRIXI *m)
{
    pOut[0] = pIn[0] * m->_11 + pIn[1] * m->_21 + pIn[2] * m->_31 + pIn[3] * m->_41;
    pOut[1] = pIn[0] * m->_12 + pIn[1] * m->_22 + pIn[2] * m->_32 + pIn[3] * m->_42;
    pOut[2] = pIn[0] * m->_13 + pIn[1] * m->_23 + pIn[2] * m->_33 + pIn[3] * m->_43;
}
//---------------------------------------------------------------------
// Index is:
//      bits 0-1 - (number of input  texture coordinates - 1)
//      bits 2-3 - (number of output texture coordinates - 1)
//
PFN_TEXTURETRANSFORM g_pfnTextureTransform[16] =
{
    TransformTexture1_1,
    TransformTexture2_1,
    TransformTexture3_1,
    TransformTexture4_1,
    TransformTexture1_2,
    TransformTexture2_2,
    TransformTexture3_2,
    TransformTexture4_2,
    TransformTexture1_3,
    TransformTexture2_3,
    TransformTexture3_3,
    TransformTexture4_3,
    TransformTexture1_4,
    TransformTexture2_4,
    TransformTexture3_4,
    TransformTexture4_4
};
//---------------------------------------------------------------------
PFN_TEXTURETRANSFORMLOOP g_pfnTextureTransformLoop[16] =
{
    TransformTexture1_1Loop,
    TransformTexture2_1Loop,
    TransformTexture3_1Loop,
    TransformTexture4_1Loop,
    TransformTexture1_2Loop,
    TransformTexture2_2Loop,
    TransformTexture3_2Loop,
    TransformTexture4_2Loop,
    TransformTexture1_3Loop,
    TransformTexture2_3Loop,
    TransformTexture3_3Loop,
    TransformTexture4_3Loop,
    TransformTexture1_4Loop,
    TransformTexture2_4Loop,
    TransformTexture3_4Loop,
    TransformTexture4_4Loop
};
//---------------------------------------------------------------------
// This function should be called every time FVF ID is changed
// All pv flags, input and output FVF id should be set before calling the
// function.
static DWORD POSITION_SIZE[16] =
{
    0, 0, 3*4, 0, 4*4, 0, 4*4, 0, 5*4, 0, 6*4, 0, 7*4, 0, 8*4, 0
};
//---------------------------------------------------------------------
// This function is called only when the input FVF is changed
//
void UpdateGeometryLoopData(LPD3DFE_PROCESSVERTICES pv)
{
// Compute input offsets
    if (!(pv->dwDeviceFlags & D3DDEV_STRIDE))
    {
        
        DWORD i = POSITION_SIZE[pv->dwVIDIn & D3DFVF_POSITION_MASK];
        pv->normalOffset = i;
        if (pv->dwVIDIn & D3DFVF_NORMAL)
            i += sizeof(D3DVECTOR);
        if (pv->dwVIDIn & D3DFVF_RESERVED1)
            i += sizeof(D3DVALUE);
        pv->diffuseOffset = i;
        if (pv->dwVIDIn & D3DFVF_DIFFUSE)
            i += sizeof(DWORD);
        pv->specularOffset = i;
        if (pv->dwVIDIn & D3DFVF_SPECULAR)
            i += sizeof(DWORD);
        pv->texOffset = i;
    }

    ComputeOutputVertexOffsets(pv);

// For pre-DX6 drivers we have to copy only one texture coordinate index 
// to the output
    pv->dwDeviceFlags &= ~D3DDEV_NOFVFANDNOTEXTURE;
    if (!(pv->dwDeviceFlags & D3DDEV_FVF || pv->dwFlags & D3DPV_VBCALL))
    {
        if (pv->nTexCoord)
        {
            for (DWORD k=0; k < pv->dwTextureIndexToCopy; k++)
                pv->texOffset += pv->dwInpTextureCoordSize[k];
        }
        else
        {
            // For non-FVF drivers we have to fill texture coordinates with 
            // zeros. 
            pv->dwDeviceFlags |= D3DDEV_NOFVFANDNOTEXTURE;
        }
    }
}
//--------------------------------------------------------------------------
// Transforms, lights vertices. Computes clip codes
//
// The following fields from pv are used:
//   dwFlags
//   dwNumVertices
//   all pointer and strides
//   position.lpvStrides
//   dwVIDIn
//   dwVIDOut
//   lpvOut
//   lpClipFlags
//   nTexCoord
// Returns:
//   returns dwClipIntersection or 0 (if D3DDEV_DONOTCLIP is set)
// Side effects:
//   dwClipUnion, dwClipIntersection are set only if D3DDEV_DONOTCLIP is not set
//   rExtents is updated if D3DDEV_DONOTUPDATEEXTENTS is not set
//
#undef DPF_MODNAME
#define DPF_MODNAME "ProcessVerticesGen"

DWORD ProcessVerticesGen(LPD3DFE_PROCESSVERTICES pv)
{
    D3DFE_CLIPCODE *hout = pv->lpClipFlags;
    D3DTLVERTEX *out  = (D3DTLVERTEX*)pv->lpvOut;
    D3DMATRIXI *m = &pv->mCTM;

    d_Setup()

    for (DWORD i = pv->dwNumVertices; i; i--) 
    {   
        D3DLIGHTINGELEMENT EyeSpaceData;
        float x, y, z, w;

        // Transform vertex to the clipping space
        d_TransformVertex(2, in, m, x, y, z, w)

        if (!(dwDeviceFlags & D3DDEV_DONOTCLIP))
        {
            DWORD clip;
            // Compute clip code
            d_ComputeClipCode(3)
            if (clip == 0)
            {
	            dwClipIntersection = 0;
                *hout++ = 0;
                w = D3DVAL(1)/w;
            }
            else
            {
                if (dwDeviceFlags & D3DDEV_GUARDBAND)
                {
                    // We do guardband check in the projection space, so
                    // we transform X and Y of the vertex there
                    d_ComputeClipCodeGB(5)
                    if ((clip & ~__D3DCLIP_INGUARDBAND) == 0)
                    {
                        // If vertex is inside the guardband we have to compute 
                        // screen coordinates
                        w = D3DVAL(1)/w;
                        *hout++ = (D3DFE_CLIPCODE)clip;
	                    dwClipIntersection &= clip;
	                    dwClipUnion |= clip;
                        goto l_DoScreenCoord;
                    }
                }
                if (pv->dwFlags & D3DPV_ONEPASSCLIPPING)
                {
                    pv->dwFirstClippedVertex = pv->dwNumVertices - i;
                    return 0;
                }
	            dwClipIntersection &= clip;
	            dwClipUnion |= clip;
                *hout++ = (D3DFE_CLIPCODE)clip;
                // If vertex is outside the frustum we can not compute screen
                // coordinates
                out->sx = x;
                out->sy = y;
                out->sz = z;
                out->rhw = w;
                goto l_DoLighting;
            }
        }
        else
        {
            // We have to check this only for DONOTCLIP case, because otherwise
            // the vertex with "we = 0" will be clipped and screen coordinates 
            // will not be computed
            // "clip" is not zero, if "w" is zero.
            if (!FLOAT_EQZ(w))
                w = D3DVAL(1)/w;
            else
                w = __HUGE_PWR2;
        }

l_DoScreenCoord:

        d_ComputeScreenCoordinates(2, x, y, z, w, out)

l_DoLighting:

        d_DoLightingAndFog(2, in, inNormal, inDiffuse, inSpecular, out);
        D3DVALUE *pOutTexture = (D3DVALUE*)((BYTE*)out + pv->texOffsetOut);
        d_CopyTextureCoordUpdateInputPointers(2, pOutTexture);
        
        NEXT(out, dwOutVerSize, D3DTLVERTEX);
    }

    d_UpdateExtents()

    pv->dwClipIntersection = dwClipIntersection;
    pv->dwClipUnion = dwClipUnion;
    return dwClipIntersection;
}
//---------------------------------------------------------------------
extern DWORD ProcessVerticesLoop(D3DFE_PROCESSVERTICES *pv);
//---------------------------------------------------------------------
DWORD D3DFE_PVFUNCS::ProcessVertices(LPD3DFE_PROCESSVERTICES pv)
{
    CD3DFPstate D3DFPstate;  // Sets optimal FPU state for D3D.
    
#ifdef DEBUG_PIPELINE
    if (g_DebugFlags & __DEBUG_MULTILOOP)
        return ProcessVerticesGen(pv);
#endif

    if (pv->dwFlags & D3DPV_LIGHTING || pv->dwDeviceFlags & D3DDEV_TEXTURETRANSFORM)
        return ProcessVerticesLoop(pv);
    else
        return ProcessVerticesGen(pv);
}
//---------------------------------------------------------------------
HRESULT D3DFE_PVFUNCS::ProcessPrimitive(LPD3DFE_PROCESSVERTICES pv)
{
    CD3DFPstate D3DFPstate;  // Sets optimal FPU state for D3D.
#ifdef DEBUG_PIPELINE
    if (!(g_DebugFlags & __DEBUG_ONEPASS))
#endif
    if (!(pv->dwDeviceFlags & D3DDEV_DONOTCLIP))
    { // We can do optimized processing of non-indexed primitives that 
      // require clipping 
        switch (pv->primType)
        {
        case D3DPT_TRIANGLELIST : return ProcessTriangleList(pv);
        case D3DPT_TRIANGLESTRIP: return ProcessTriangleStrip(pv);
        case D3DPT_TRIANGLEFAN  : return ProcessTriangleFan(pv);
        case D3DPT_LINELIST     : return ProcessLineList(pv);
        case D3DPT_LINESTRIP    : return ProcessLineStrip(pv);
        }
    }
    this->ProcessVertices(pv);
    if (pv->dwClipIntersection)
    {
        // all vertices were offscreen
        return D3D_OK;
    }
    // This should not be required as we should be able to change
    // the parameter of DoDrawPrimtive and all it's children to pv
    return (DoDrawPrimitive(pv));
}
//---------------------------------------------------------------------
HRESULT D3DFE_PVFUNCS::ProcessIndexedPrimitive(LPD3DFE_PROCESSVERTICES pv)
{
    this->ProcessVertices(pv);
    if (pv->dwClipIntersection)
    {
        // all vertices were offscreen
        return D3D_OK;
    }
    return (DoDrawIndexedPrimitive(pv));
}
//---------------------------------------------------------------------
D3DFE_PROCESSVERTICES::D3DFE_PROCESSVERTICES()
{
    for (DWORD i=0; i < D3DDP_MAXTEXCOORD; i++)
    {
        // Set texture size array to default for pre-DX7 drivers
        this->dwTextureCoordSize[i] = 4*2;
    }

    for (i = 0; i < VER_IN_BATCH-1; i++)
    {
        clipVer[i].next = &clipVer[i+1];
    }
    clipVer[VER_IN_BATCH-1].next = clipVer;
    this->dwFlags = 0;
    this->dwDeviceFlags = 0;
    this->dwFlags2 = 0;
    this->dwMaxUserClipPlanes = 0;
#ifdef DEBUG_PIPELINE
    GetD3DRegValue(REG_DWORD, "DebugFlags", &g_DebugFlags, 4);
#endif
}
//---------------------------------------------------------------------
void DIRECT3DDEVICEI::CheckClipStatus(D3DVALUE * pPositions, 
                                      DWORD dwStride, 
                                      DWORD dwNumVertices, 
                                      DWORD *pdwClipUnion,
                                      DWORD *pdwClipIntersection)
{
#define pv this
    D3DVECTOR *p = (D3DVECTOR*)pPositions;
    D3DMATRIXI *m = &this->mCTM;
    DWORD dwClipUnion = 0;
    DWORD dwClipIntersection = ~0;

    for (DWORD i = dwNumVertices; i; i--) 
    {   
        D3DVALUE x, y, z, w;
        DWORD clip;

        // Transform vertex to the clipping space
        x = p->x*m->_11 + p->y*m->_21 + p->z*m->_31 + m->_41;
        y = p->x*m->_12 + p->y*m->_22 + p->z*m->_32 + m->_42;
        z = p->x*m->_13 + p->y*m->_23 + p->z*m->_33 + m->_43;
        w = p->x*m->_14 + p->y*m->_24 + p->z*m->_34 + m->_44;
        d_ComputeClipCode(2)
        p = (D3DVECTOR*)((BYTE*)p + dwStride);
        dwClipUnion |= clip;
        dwClipIntersection &= clip;
    }
    *pdwClipIntersection = dwClipIntersection; 
    *pdwClipUnion = dwClipUnion;
#undef pv
}