/*
* Glide64 - Glide video plugin for Nintendo 64 emulators.
* Copyright (c) 2002  Dave2001
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 
* Boston, MA  02110-1301, USA
*/

//****************************************************************
//
// Glide64 - Glide Plugin for Nintendo 64 emulators (tested mostly with Project64)
// Project started on December 29th, 2001
//
// To modify Glide64:
// * Write your name and (optional)email, commented by your work, so I know who did it, and so that you can find which parts you modified when it comes time to send it to me.
// * Do NOT send me the whole project or file that you modified.  Take out your modified code sections, and tell me where to put them.  If people sent the whole thing, I would have many different versions, but no idea how to combine them all.
//
// Official Glide64 development channel: #Glide64 on EFnet
//
// Original author: Dave2001 (Dave2999@hotmail.com)
// Other authors: Gonetz, Gugaman
//
//****************************************************************
//
// January 2004 Created by Gonetz (Gonetz@ngs.ru)
//****************************************************************

DWORD uc8_normale_addr = 0;
float uc8_coord_mod[16];

static void uc8_vertex ()
{
  if (rdp.update & UPDATE_MULT_MAT)
  {
    rdp.update ^= UPDATE_MULT_MAT;
        MulMatrices(rdp.model, rdp.proj, rdp.combined);
  }
  
  DWORD addr = segoffset(rdp.cmd1);
  int v0, i, n;
  float x, y, z;
  
  rdp.vn = n = (rdp.cmd0 >> 12) & 0xFF;
  rdp.v0 = v0 = ((rdp.cmd0 >> 1) & 0x7F) - n;
  
    FRDP ("uc8:vertex n: %d, v0: %d, from: %08lx\n", n, v0, addr);
  
  if (v0 < 0)
  {
    RDP_E ("** ERROR: uc2:vertex v0 < 0\n");
    RDP ("** ERROR: uc2:vertex v0 < 0\n");
    return;
  }
    //*  
  // This is special, not handled in update()
  if (rdp.update & UPDATE_LIGHTS)
  {
    rdp.update ^= UPDATE_LIGHTS;
    
    // Calculate light vectors
    for (DWORD l=0; l<rdp.num_lights; l++)
    {
            InverseTransformVector(&rdp.light[l].dir_x, rdp.light_vector[l], rdp.model);
      NormalizeVector (rdp.light_vector[l]);
#ifdef EXTREME_LOGGING
            FRDP("light_vector[%d] x: %f, y: %f, z: %f\n", l, rdp.light_vector[l][0], rdp.light_vector[l][1], rdp.light_vector[l][2]);
#endif
    }
  }
//*/
  for (i=0; i < (n<<4); i+=16)
  {
    VERTEX *v = &rdp.vtx[v0 + (i>>4)];
    x   = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 0)^1];
    y   = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 1)^1];
    z   = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 2)^1];
    v->flags  = ((WORD*)gfx.RDRAM)[(((addr+i) >> 1) + 3)^1];
    v->ou   = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 4)^1] * rdp.tiles[rdp.cur_tile].s_scale;
    v->ov   = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 5)^1] * rdp.tiles[rdp.cur_tile].t_scale;
    v->a    = ((BYTE*)gfx.RDRAM)[(addr+i + 15)^3];

#ifdef EXTREME_LOGGING
        FRDP ("before v%d - x: %f, y: %f, z: %f\n", i>>4, x, y, z);
#endif
    v->x = x*rdp.combined[0][0] + y*rdp.combined[1][0] + z*rdp.combined[2][0] + rdp.combined[3][0];
    v->y = x*rdp.combined[0][1] + y*rdp.combined[1][1] + z*rdp.combined[2][1] + rdp.combined[3][1];
    v->z = x*rdp.combined[0][2] + y*rdp.combined[1][2] + z*rdp.combined[2][2] + rdp.combined[3][2];
    v->w = x*rdp.combined[0][3] + y*rdp.combined[1][3] + z*rdp.combined[2][3] + rdp.combined[3][3];
    
#ifdef EXTREME_LOGGING
        FRDP ("v%d - x: %f, y: %f, z: %f, w: %f, u: %f, v: %f, flags: %d\n", i>>4, v->x, v->y, v->z, v->w, v->ou, v->ov, v->flags);
#endif
    
    v->oow = 1.0f / v->w;
    v->x_w = v->x * v->oow;
    v->y_w = v->y * v->oow;
    v->z_w = v->z * v->oow;
    
    v->uv_calculated = 0xFFFFFFFF;
    v->screen_translated = 0;
    v->shade_mods_allowed = 1;
    
    v->scr_off = 0;
    if (v->x < -v->w) v->scr_off |= 1;
    if (v->x > v->w) v->scr_off |= 2;
    if (v->y < -v->w) v->scr_off |= 4;
    if (v->y > v->w) v->scr_off |= 8;
    if (v->w < 0.1f) v->scr_off |= 16;
///*
    v->r = ((BYTE*)gfx.RDRAM)[(addr+i + 12)^3];
    v->g = ((BYTE*)gfx.RDRAM)[(addr+i + 13)^3];
    v->b = ((BYTE*)gfx.RDRAM)[(addr+i + 14)^3];
#ifdef EXTREME_LOGGING
        FRDP ("r: %02lx, g: %02lx, b: %02lx, a: %02lx\n", v->r, v->g, v->b, v->a);
#endif
        
        if ((rdp.geom_mode & 0x00020000))
        {
            DWORD shift = v0 << 1;
            v->vec[0] = ((char*)gfx.RDRAM)[(uc8_normale_addr + (i>>3) + shift + 0)^3];
            v->vec[1] = ((char*)gfx.RDRAM)[(uc8_normale_addr + (i>>3) + shift + 1)^3];
            v->vec[2] = (char)(v->flags&0xff);
            
            if (rdp.geom_mode & 0x80000) 
            {
                calc_linear (v);
#ifdef EXTREME_LOGGING
                FRDP ("calc linear: v%d - u: %f, v: %f\n", i>>4, v->ou, v->ov);
#endif
            }
            else if (rdp.geom_mode & 0x40000) 
            {
                calc_sphere (v);
#ifdef EXTREME_LOGGING
                FRDP ("calc sphere: v%d - u: %f, v: %f\n", i>>4, v->ou, v->ov);
#endif
            }
            //     FRDP("calc light. r: 0x%02lx, g: 0x%02lx, b: 0x%02lx, nx: %.3f, ny: %.3f, nz: %.3f\n", v->r, v->g, v->b, v->vec[0], v->vec[1], v->vec[2]);
            FRDP("v[%d] calc light. r: 0x%02lx, g: 0x%02lx, b: 0x%02lx\n", i>>4, v->r, v->g, v->b);
            float color[3] = {rdp.light[rdp.num_lights].r, rdp.light[rdp.num_lights].g, rdp.light[rdp.num_lights].b};
            FRDP("ambient light. r: %f, g: %f, b: %f\n", color[0], color[1], color[2]);
            float light_intensity = 0.0f;
            DWORD l;
            if (rdp.geom_mode & 0x00400000)
            {
                NormalizeVector (v->vec);
                for (l = 0; l < rdp.num_lights-1; l++)
        {
          if (!rdp.light[l].nonblack)
            continue;
          light_intensity = DotProduct (rdp.light_vector[l], v->vec);
          FRDP("light %d, intensity : %f\n", l, light_intensity);
          if (light_intensity < 0.0f) 
            continue;
          //*
          if (rdp.light[l].ca > 0.0f)
          {
            float vx = (v->x + uc8_coord_mod[8])*uc8_coord_mod[12] - rdp.light[l].x;
            float vy = (v->y + uc8_coord_mod[9])*uc8_coord_mod[13] - rdp.light[l].y;
            float vz = (v->z + uc8_coord_mod[10])*uc8_coord_mod[14] - rdp.light[l].z;
            float vw = (v->w + uc8_coord_mod[11])*uc8_coord_mod[15] - rdp.light[l].w;
            float len = (vx*vx+vy*vy+vz*vz+vw*vw)/65536.0f;
            float p_i = rdp.light[l].ca / len;
            if (p_i > 1.0f) p_i = 1.0f;
            light_intensity *= p_i;
            FRDP("light %d, len: %f, p_intensity : %f\n", l, len, p_i);
          }
//*/
          color[0] += rdp.light[l].r * light_intensity;
          color[1] += rdp.light[l].g * light_intensity;
          color[2] += rdp.light[l].b * light_intensity;
          FRDP("light %d r: %f, g: %f, b: %f\n", l, color[0], color[1], color[2]);
        }   
        light_intensity = DotProduct (rdp.light_vector[l], v->vec);
        FRDP("light %d, intensity : %f\n", l, light_intensity);
        if (light_intensity > 0.0f) 
        {
          color[0] += rdp.light[l].r * light_intensity;
          color[1] += rdp.light[l].g * light_intensity;
          color[2] += rdp.light[l].b * light_intensity;
        }
        FRDP("light %d r: %f, g: %f, b: %f\n", l, color[0], color[1], color[2]);
      }
            else 
            {
                for (l = 0; l < rdp.num_lights; l++)
                {
                    if (rdp.light[l].nonblack && rdp.light[l].nonzero)
                    {
                        float vx = (v->x + uc8_coord_mod[8])*uc8_coord_mod[12] - rdp.light[l].x;
                        float vy = (v->y + uc8_coord_mod[9])*uc8_coord_mod[13] - rdp.light[l].y;
                        float vz = (v->z + uc8_coord_mod[10])*uc8_coord_mod[14] - rdp.light[l].z;
                        float vw = (v->w + uc8_coord_mod[11])*uc8_coord_mod[15] - rdp.light[l].w;
                        float len = (vx*vx+vy*vy+vz*vz+vw*vw)/65536.0f;
                        light_intensity = rdp.light[l].ca / len;
                        if (light_intensity > 1.0f) light_intensity = 1.0f;
                        FRDP("light %d, p_intensity : %f\n", l, light_intensity);
                        color[0] += rdp.light[l].r * light_intensity;
                        color[1] += rdp.light[l].g * light_intensity;
                        color[2] += rdp.light[l].b * light_intensity;
                        //FRDP("light %d r: %f, g: %f, b: %f\n", l, color[0], color[1], color[2]);
                    }   
                }
            }
            if (color[0] > 1.0f) color[0] = 1.0f;
            if (color[1] > 1.0f) color[1] = 1.0f;
            if (color[2] > 1.0f) color[2] = 1.0f;
            v->r = (BYTE)(((float)v->r)*color[0]);
            v->g = (BYTE)(((float)v->g)*color[1]);
            v->b = (BYTE)(((float)v->b)*color[2]);
#ifdef EXTREME_LOGGING
        FRDP("color after light: r: 0x%02lx, g: 0x%02lx, b: 0x%02lx\n", v->r, v->g, v->b);
#endif
    }
  }
}

static void uc8_moveword ()
{
  BYTE index = (BYTE)((rdp.cmd0 >> 16) & 0xFF);
  WORD offset = (WORD)(rdp.cmd0 & 0xFFFF);
  DWORD data = rdp.cmd1;
  
  FRDP ("uc8:moveword ");
  
  switch (index)
  {
    // NOTE: right now it's assuming that it sets the integer part first.  This could
    //  be easily fixed, but only if i had something to test with.
    
  case 0x02:
    rdp.num_lights = (data / 48);
    rdp.update |= UPDATE_LIGHTS;
    FRDP ("numlights: %d\n", rdp.num_lights);
    break;
    
  case 0x04:
    FRDP ("mw_clip %08lx, %08lx\n", rdp.cmd0, rdp.cmd1);
    break;
    
  case 0x06:  // moveword SEGMENT
    {
      FRDP ("SEGMENT %08lx -> seg%d\n", data, offset >> 2);
      rdp.segment[(offset >> 2) & 0xF] = data;
    }
    break;
    
  case 0x08:
    {
            rdp.fog_multiplier = (short)(rdp.cmd1 >> 16);
            rdp.fog_offset = (short)(rdp.cmd1 & 0x0000FFFF);
            FRDP ("fog: multiplier: %f, offset: %f\n", rdp.fog_multiplier, rdp.fog_offset);
    }
    break;
    
  case 0x0c:
    RDP_E ("uc8:moveword forcemtx - IGNORED\n");
    RDP ("forcemtx - IGNORED\n");
    break;
    
  case 0x0e:
    RDP ("perspnorm - IGNORED\n");
    break;
    
    case 0x10:  // moveword coord mod
    {
      BYTE n = offset >> 2;
      
            FRDP ("coord mod:%d, %08lx\n", n, data);
            if (rdp.cmd0&8)
                return;
            DWORD idx = (rdp.cmd0>>1)&3;
            DWORD pos = rdp.cmd0&0x30;
            if (pos == 0)
            {
                uc8_coord_mod[0+idx] = (short)(rdp.cmd1>>16);
                uc8_coord_mod[1+idx] = (short)(rdp.cmd1&0xffff);
            }
            else if (pos == 0x10)
            {
                uc8_coord_mod[4+idx] = (rdp.cmd1>>16)/65536.0f;
                uc8_coord_mod[5+idx] = (rdp.cmd1&0xffff)/65536.0f;
                uc8_coord_mod[12+idx] = uc8_coord_mod[0+idx] + uc8_coord_mod[4+idx];
                uc8_coord_mod[13+idx] = uc8_coord_mod[1+idx] + uc8_coord_mod[5+idx];
                
            }
            else if (pos == 0x20)
            {
                uc8_coord_mod[8+idx] = (short)(rdp.cmd1>>16);
                uc8_coord_mod[9+idx] = (short)(rdp.cmd1&0xffff);
#ifdef EXTREME_LOGGING
                if (idx)
                {
                    for (int k = 8; k < 16; k++)
                    {
                        FRDP("coord_mod[%d]=%f\n", k, uc8_coord_mod[k]);
                    }
                }
#endif
            }
            
    }
    break;

  default:
    FRDP_E("uc8:moveword unknown (index: 0x%08lx, offset 0x%08lx)\n", index, offset);
    FRDP ("unknown (index: 0x%08lx, offset 0x%08lx)\n", index, offset);
  }
}

static void uc8_movemem ()
{
  int idx = rdp.cmd0 & 0xFF;
  DWORD addr = segoffset(rdp.cmd1);
  int ofs = (rdp.cmd0 >> 5) & 0x3FFF;
  
  FRDP ("uc8:movemem ofs:%d ", ofs);
  
  switch (idx)
  {
  case 8:   // VIEWPORT
    {
      DWORD a = addr >> 1;
      short scale_x = ((short*)gfx.RDRAM)[(a+0)^1] >> 2;
      short scale_y = ((short*)gfx.RDRAM)[(a+1)^1] >> 2;
      short scale_z = ((short*)gfx.RDRAM)[(a+2)^1];
      short trans_x = ((short*)gfx.RDRAM)[(a+4)^1] >> 2;
      short trans_y = ((short*)gfx.RDRAM)[(a+5)^1] >> 2;
      short trans_z = ((short*)gfx.RDRAM)[(a+6)^1];
      rdp.view_scale[0] = scale_x * rdp.scale_x;
      rdp.view_scale[1] = -scale_y * rdp.scale_y;
            rdp.view_scale[2] = 32.0f * scale_z;
      rdp.view_trans[0] = trans_x * rdp.scale_x;
      rdp.view_trans[1] = trans_y * rdp.scale_y;
            rdp.view_trans[2] = 32.0f * trans_z;
      
      rdp.update |= UPDATE_VIEWPORT;
      
      FRDP ("viewport scale(%d, %d), trans(%d, %d), from:%08lx\n", scale_x, scale_y,
        trans_x, trans_y, a);
    }
    break;
    
  case 10:  // LIGHT
    {
            int n = (ofs / 48);
            if (n < 2)
            {
              char dir_x = ((char*)gfx.RDRAM)[(addr+8)^3];
              rdp.lookat[n][0] = (float)(dir_x) / 127.0f;
              char dir_y = ((char*)gfx.RDRAM)[(addr+9)^3];
              rdp.lookat[n][1] = (float)(dir_y) / 127.0f;
              char dir_z = ((char*)gfx.RDRAM)[(addr+10)^3];
              rdp.lookat[n][2] = (float)(dir_z) / 127.0f;
              rdp.use_lookat = TRUE;
              if (n == 1)
              {
                 if (!dir_x && !dir_y)
                   rdp.use_lookat = FALSE;
              }
              FRDP("lookat_%d (%f, %f, %f)\n", n, rdp.lookat[n][0], rdp.lookat[n][1], rdp.lookat[n][2]);
              return;
            }
            n -= 2;
            BYTE col = gfx.RDRAM[(addr+0)^3];
            rdp.light[n].r = (float)col / 255.0f;
            rdp.light[n].nonblack = col;
            col = gfx.RDRAM[(addr+1)^3];
            rdp.light[n].g = (float)col / 255.0f;
            rdp.light[n].nonblack += col;
            col = gfx.RDRAM[(addr+2)^3];
            rdp.light[n].b = (float)col / 255.0f;
            rdp.light[n].nonblack += col;
      rdp.light[n].a = 1.0f;
      rdp.light[n].dir_x = (float)(((char*)gfx.RDRAM)[(addr+8)^3]) / 127.0f;
      rdp.light[n].dir_y = (float)(((char*)gfx.RDRAM)[(addr+9)^3]) / 127.0f;
      rdp.light[n].dir_z = (float)(((char*)gfx.RDRAM)[(addr+10)^3]) / 127.0f;
            // **
            DWORD a = addr >> 1;
            //FIXME: Why unused?
            //short pos = ((short*)gfx.RDRAM)[(a+16)^1];
            rdp.light[n].x = (float)(((short*)gfx.RDRAM)[(a+16)^1]);
            rdp.light[n].y = (float)(((short*)gfx.RDRAM)[(a+17)^1]);
            rdp.light[n].z = (float)(((short*)gfx.RDRAM)[(a+18)^1]);
            rdp.light[n].w = (float)(((short*)gfx.RDRAM)[(a+19)^1]);
            rdp.light[n].nonzero = gfx.RDRAM[(addr+12)^3];
            rdp.light[n].ca = (float)rdp.light[n].nonzero / 16.0f;
            //          rdp.light[n].la = rdp.light[n].ca * 1.0f;
            //#ifdef EXTREME_LOGGING
            FRDP ("light: n: %d, pos: x: %f, y: %f, z: %f, w: %f, ca: %f\n",
                n, rdp.light[n].x, rdp.light[n].y, rdp.light[n].z, rdp.light[n].w, rdp.light[n].ca);
            //#endif
            FRDP ("light: n: %d, r: %f, g: %f, b: %f. dir: x: %.3f, y: %.3f, z: %.3f\n",
        n, rdp.light[n].r, rdp.light[n].g, rdp.light[n].b,
        rdp.light[n].dir_x, rdp.light[n].dir_y, rdp.light[n].dir_z);
#ifdef EXTREME_LOGGING
            for (int t=0; t < 24; t++)
            {
                FRDP ("light[%d] = 0x%04lx \n", t, ((WORD*)gfx.RDRAM)[(a+t)^1]);
            }
#endif
    }
    break;
    
    case 14: //Normales
    {
            uc8_normale_addr = segoffset(rdp.cmd1);
            FRDP ("Normale - addr: %08lx\n", uc8_normale_addr);
#ifdef EXTREME_LOGGING
            for (int i = 0; i < 32; i++)
            {
                char x = ((char*)gfx.RDRAM)[uc8_normale_addr + ((i<<1) + 0)^3];
                char y = ((char*)gfx.RDRAM)[uc8_normale_addr + ((i<<1) + 1)^3];
                FRDP("#%d x = %d, y = %d\n", i, x, y);
            }
            DWORD a = uc8_normale_addr >> 1;
            for (i = 0; i < 32; i++)
            {
                FRDP ("n[%d] = 0x%04lx \n", i, ((WORD*)gfx.RDRAM)[(a+i)^1]);
            }
#endif
    }
    break;
    
  default:
        FRDP ("uc8:movemem unknown (%d)\n", idx);
  }
}


static void uc8_tri4() //by Gugaman Apr 19 2002
{ 
    if (rdp.skip_drawing)
    {
      RDP("uc8:tri4. skipped\n");
      return;
    }

    FRDP("uc8:tri4 (#%d - #%d), %d-%d-%d, %d-%d-%d, %d-%d-%d, %d-%d-%d\n",
        rdp.tri_n,
        rdp.tri_n+3,
        ((rdp.cmd0 >> 23) & 0x1F),
        ((rdp.cmd0 >> 18) & 0x1F),
        ((((rdp.cmd0 >> 15) & 0x7) << 2) | ((rdp.cmd1 >> 30) &0x3)),
        ((rdp.cmd0 >> 10) & 0x1F),
        ((rdp.cmd0 >> 5) & 0x1F),
        ((rdp.cmd0 >> 0) & 0x1F),
        ((rdp.cmd1 >> 25) & 0x1F),
        ((rdp.cmd1 >> 20) & 0x1F),
        ((rdp.cmd1 >> 15) & 0x1F),
        ((rdp.cmd1 >> 10) & 0x1F),
        ((rdp.cmd1 >> 5) & 0x1F),
        ((rdp.cmd1 >> 0) & 0x1F));

    VERTEX *v[12] = {
            &rdp.vtx[(rdp.cmd0 >> 23) & 0x1F],
            &rdp.vtx[(rdp.cmd0 >> 18) & 0x1F],
            &rdp.vtx[((((rdp.cmd0 >> 15) & 0x7) << 2) | ((rdp.cmd1 >> 30) &0x3))],
            &rdp.vtx[(rdp.cmd0 >> 10) & 0x1F],
            &rdp.vtx[(rdp.cmd0 >> 5) & 0x1F],
            &rdp.vtx[(rdp.cmd0 >> 0) & 0x1F],
            &rdp.vtx[(rdp.cmd1 >> 25) & 0x1F],
            &rdp.vtx[(rdp.cmd1 >> 20) & 0x1F],
            &rdp.vtx[(rdp.cmd1 >> 15) & 0x1F],
            &rdp.vtx[(rdp.cmd1 >> 10) & 0x1F],
            &rdp.vtx[(rdp.cmd1 >> 5) & 0x1F],
            &rdp.vtx[(rdp.cmd1 >> 0) & 0x1F]
    };

  BOOL updated = 0;

  if (cull_tri(v))
    rdp.tri_n ++;
  else
  {
    updated = 1;
    update ();

    DrawTri (v);
    rdp.tri_n ++;
  }

  if (cull_tri(v+3))
    rdp.tri_n ++;
  else
  {
    if (!updated)
    {
      updated = 1;
      update ();
    }

    DrawTri (v+3);
    rdp.tri_n ++;
  }

  if (cull_tri(v+6))
    rdp.tri_n ++;
  else
  {
    if (!updated)
    {
      updated = 1;
      update ();
    }

    DrawTri (v+6);
    rdp.tri_n ++;
  }

  if (cull_tri(v+9))
    rdp.tri_n ++;
  else
  {
    if (!updated)
    {
      updated = 1;
      update ();
    }

    DrawTri (v+9);
    rdp.tri_n ++;
  }
}