Exemplo n.º 1
0
void ComputeClipWindows()
{
   struct ClipData* pClip = &IPPU.Clip [0];
   int c, w, i;

   // Loop around the main screen then the sub-screen.
   for (c = 0; c < 2; c++, pClip++)
   {
      // Loop around the colour window then a clip window for each of the
      // background layers.
      for (w = 5; w >= 0; w--)
      {
         pClip->Count[w] = 0;

         if (w == 5) // The colour window...
         {
            if (c == 0) // ... on the main screen
            {
               if ((Memory.FillRAM [0x2130] & 0xc0) == 0xc0)
               {
                  // The whole of the main screen is switched off,
                  // completely clip everything.
                  for (i = 0; i < 6; i++)
                  {
                     IPPU.Clip [c].Count [i] = 1;
                     IPPU.Clip [c].Left [0][i] = 1;
                     IPPU.Clip [c].Right [0][i] = 0;
                  }
                  continue;
               }
               else if ((Memory.FillRAM [0x2130] & 0xc0) == 0x00)
                  continue;
            }
            else
            {
               // .. colour window on the sub-screen.
               if ((Memory.FillRAM [0x2130] & 0x30) == 0x30)
               {
                  // The sub-screen is switched off, completely
                  // clip everything.
                  int i;
                  for (i = 0; i < 6; i++)
                  {
                     IPPU.Clip [1].Count [i] = 1;
                     IPPU.Clip [1].Left [0][i] = 1;
                     IPPU.Clip [1].Right [0][i] = 0;
                  }
                  return;
               }
               else if ((Memory.FillRAM [0x2130] & 0x30) == 0x00)
                  continue;
            }
         }

         //       if (!Settings.DisableGraphicWindows)
         {
            if (w == 5 || pClip->Count [5] ||
                  (Memory.FillRAM [0x212c + c] & Memory.FillRAM [0x212e + c] & (1 << w)))
            {
               struct Band Win1[3];
               struct Band Win2[3];
               uint32_t Window1Enabled = 0;
               uint32_t Window2Enabled = 0;
               bool invert = (w == 5 &&
                               ((c == 1 && (Memory.FillRAM [0x2130] & 0x30) == 0x10) ||
                                (c == 0 && (Memory.FillRAM [0x2130] & 0xc0) == 0x40)));

               if (w == 5 ||
                     (Memory.FillRAM [0x212c + c] & Memory.FillRAM [0x212e + c] & (1 << w)))
               {
                  if (PPU.ClipWindow1Enable [w])
                  {
                     if (!PPU.ClipWindow1Inside [w])
                     {
                        Win1[Window1Enabled].Left = PPU.Window1Left;
                        Win1[Window1Enabled++].Right = PPU.Window1Right + 1;
                     }
                     else
                     {
                        if (PPU.Window1Left <= PPU.Window1Right)
                        {
                           if (PPU.Window1Left > 0)
                           {
                              Win1[Window1Enabled].Left = 0;
                              Win1[Window1Enabled++].Right = PPU.Window1Left;
                           }
                           if (PPU.Window1Right < 255)
                           {
                              Win1[Window1Enabled].Left = PPU.Window1Right + 1;
                              Win1[Window1Enabled++].Right = 256;
                           }
                           if (Window1Enabled == 0)
                           {
                              Win1[Window1Enabled].Left = 1;
                              Win1[Window1Enabled++].Right = 0;
                           }
                        }
                        else
                        {
                           // 'outside' a window with no range -
                           // appears to be the whole screen.
                           Win1[Window1Enabled].Left = 0;
                           Win1[Window1Enabled++].Right = 256;
                        }
                     }
                  }
                  if (PPU.ClipWindow2Enable [w])
                  {
                     if (!PPU.ClipWindow2Inside [w])
                     {
                        Win2[Window2Enabled].Left = PPU.Window2Left;
                        Win2[Window2Enabled++].Right = PPU.Window2Right + 1;
                     }
                     else
                     {
                        if (PPU.Window2Left <= PPU.Window2Right)
                        {
                           if (PPU.Window2Left > 0)
                           {
                              Win2[Window2Enabled].Left = 0;
                              Win2[Window2Enabled++].Right = PPU.Window2Left;
                           }
                           if (PPU.Window2Right < 255)
                           {
                              Win2[Window2Enabled].Left = PPU.Window2Right + 1;
                              Win2[Window2Enabled++].Right = 256;
                           }
                           if (Window2Enabled == 0)
                           {
                              Win2[Window2Enabled].Left = 1;
                              Win2[Window2Enabled++].Right = 0;
                           }
                        }
                        else
                        {
                           Win2[Window2Enabled].Left = 0;
                           Win2[Window2Enabled++].Right = 256;
                        }
                     }
                  }
               }
               if (Window1Enabled && Window2Enabled)
               {
                  // Overlap logic
                  //
                  // Each window will be in one of three states:
                  // 1. <no range> (Left > Right. One band)
                  // 2. |    ----------------             | (Left >= 0, Right <= 255, Left <= Right. One band)
                  // 3. |------------           ----------| (Left1 == 0, Right1 < Left2; Left2 > Right1, Right2 == 255. Two bands)

                  struct Band Bands [6];
                  int B = 0;
                  switch (PPU.ClipWindowOverlapLogic [w] ^ 1)
                  {
                  case CLIP_OR:
                     if (Window1Enabled == 1)
                     {
                        if (BAND_EMPTY(Win1[0]))
                        {
                           B = Window2Enabled;
                           // memmove converted: Different stack allocations [Neb]
                           memcpy(Bands, Win2,
                                  sizeof(Win2[0]) * Window2Enabled);
                        }
                        else
                        {
                           if (Window2Enabled == 1)
                           {
                              if (BAND_EMPTY(Win2[0]))
                                 Bands[B++] = Win1[0];
                              else
                              {
                                 if (BANDS_INTERSECT(Win1[0], Win2[0]))
                                 {
                                    OR_BANDS(Bands[0], Win1[0], Win2[0])
                                    B = 1;
                                 }
                                 else
                                 {
                                    Bands[B++] = Win1[0];
                                    Bands[B++] = Win2[0];
                                 }
                              }
                           }
                           else
                           {
                              if (BANDS_INTERSECT(Win1[0], Win2[0]))
                              {
                                 OR_BANDS(Bands[0], Win1[0], Win2[0])
                                 if (BANDS_INTERSECT(Win1[0], Win2[1]))
                                    OR_BANDS(Bands[1], Win1[0], Win2[1])
                                    else
                                       Bands[1] = Win2[1];
                                 B = 1;
                                 if (BANDS_INTERSECT(Bands[0], Bands[1]))
                                    OR_BANDS(Bands[0], Bands[0], Bands[1])
                                    else
                                       B = 2;
                              }
                              else if (BANDS_INTERSECT(Win1[0], Win2[1]))
                              {
                                 Bands[B++] = Win2[0];
                                 OR_BANDS(Bands[B], Win1[0], Win2[1]);
                                 B++;
                              }
                              else
                              {
                                 Bands[0] = Win2[0];
                                 Bands[1] = Win1[0];
                                 Bands[2] = Win2[1];
                                 B = 3;
                              }
                           }
                        }
                     }
                     else if (Window2Enabled == 1)
                     {
                        if (BAND_EMPTY(Win2[0]))
                        {
                           // Window 2 defines an empty range - just
                           // use window 1 as the clipping (which
                           // could also be empty).
                           B = Window1Enabled;
                           // memmove converted: Different stack allocations [Neb]
                           memcpy(Bands, Win1,
                                  sizeof(Win1[0]) * Window1Enabled);
                        }
                        else
                        {
                           // Window 1 has two bands and Window 2 has one.
                           // Neither is an empty region.
                           if (BANDS_INTERSECT(Win2[0], Win1[0]))
                           {
                              OR_BANDS(Bands[0], Win2[0], Win1[0])
                              if (BANDS_INTERSECT(Win2[0], Win1[1]))
                                 OR_BANDS(Bands[1], Win2[0], Win1[1])
                                 else
                                    Bands[1] = Win1[1];
                              B = 1;
                              if (BANDS_INTERSECT(Bands[0], Bands[1]))
                                 OR_BANDS(Bands[0], Bands[0], Bands[1])
                                 else
                                    B = 2;
                           }
                           else if (BANDS_INTERSECT(Win2[0], Win1[1]))
                           {
                              Bands[B++] = Win1[0];
                              OR_BANDS(Bands[B], Win2[0], Win1[1]);
                              B++;
                           }
                           else
                           {
                              Bands[0] = Win1[0];
                              Bands[1] = Win2[0];
                              Bands[2] = Win1[1];
                              B = 3;
                           }
                        }
                     }
                     else
                     {
                        // Both windows have two bands
                        OR_BANDS(Bands[0], Win1[0], Win2[0]);
                        OR_BANDS(Bands[1], Win1[1], Win2[1]);
                        B = 1;
                        if (BANDS_INTERSECT(Bands[0], Bands[1]))
                           OR_BANDS(Bands[0], Bands[0], Bands[1])
                           else
                              B = 2;
                     }
                     break;

                  case CLIP_AND:
                     if (Window1Enabled == 1)
                     {
                        // Window 1 has one band
                        if (BAND_EMPTY(Win1[0]))
                           Bands [B++] = Win1[0];
                        else if (Window2Enabled == 1)
                        {
                           if (BAND_EMPTY(Win2[0]))
                              Bands [B++] = Win2[0];
                           else
                           {
                              AND_BANDS(Bands[0], Win1[0], Win2[0]);
                              B = 1;
                           }
                        }
                        else
                        {
                           AND_BANDS(Bands[0], Win1[0], Win2[0]);
                           AND_BANDS(Bands[1], Win1[0], Win2[1]);
                           B = 2;
                        }
                     }
                     else if (Window2Enabled == 1)
                     {
                        if (BAND_EMPTY(Win2[0]))
                           Bands[B++] = Win2[0];
                        else
                        {
                           // Window 1 has two bands.
                           AND_BANDS(Bands[0], Win1[0], Win2[0]);
                           AND_BANDS(Bands[1], Win1[1], Win2[0]);
                           B = 2;
                        }
                     }
                     else
                     {
                        // Both windows have two bands.
                        AND_BANDS(Bands[0], Win1[0], Win2[0]);
                        AND_BANDS(Bands[1], Win1[1], Win2[1]);
                        B = 2;
                        if (BANDS_INTERSECT(Win1[0], Win2[1]))
                        {
                           AND_BANDS(Bands[2], Win1[0], Win2[1]);
                           B = 3;
                        }
                        else if (BANDS_INTERSECT(Win1[1], Win2[0]))
                        {
                           AND_BANDS(Bands[2], Win1[1], Win2[0]);
                           B = 3;
                        }
                     }
                     break;
                  case CLIP_XNOR:
                     invert = !invert;
                  // Fall...

                  case CLIP_XOR:
                     if (Window1Enabled == 1 && BAND_EMPTY(Win1[0]))
                     {
                        B = Window2Enabled;
                        // memmove converted: Different stack allocations [Neb]
                        memcpy(Bands, Win2,
                               sizeof(Win2[0]) * Window2Enabled);
                     }
                     else if (Window2Enabled == 1 && BAND_EMPTY(Win2[0]))
                     {
                        B = Window1Enabled;
                        // memmove converted: Different stack allocations [Neb]
                        memcpy(Bands, Win1,
                               sizeof(Win1[0]) * Window1Enabled);
                     }
                     else
                     {
                        uint32_t p = 0;
                        uint32_t points [10];
                        uint32_t i;

                        invert = !invert;
                        // Build an array of points (window edges)
                        points [p++] = 0;
                        for (i = 0; i < Window1Enabled; i++)
                        {
                           points [p++] = Win1[i].Left;
                           points [p++] = Win1[i].Right;
                        }
                        for (i = 0; i < Window2Enabled; i++)
                        {
                           points [p++] = Win2[i].Left;
                           points [p++] = Win2[i].Right;
                        }
                        points [p++] = 256;
                        // Sort them
                        qsort((void*) points, p, sizeof(points [0]),
                              IntCompare);
                        for (i = 0; i < p; i += 2)
                        {
                           if (points [i] == points [i + 1])
                              continue;
                           Bands [B].Left = points [i];
                           while (i + 2 < p &&
                                  points [i + 1] == points [i + 2])
                              i += 2;
                           Bands [B++].Right = points [i + 1];
                        }
                     }
                     break;
                  }
                  if (invert)
                  {
                     int b;
                     int j = 0;
                     int empty_band_count = 0;

                     // First remove all empty bands from the list.
                     for (b = 0; b < B; b++)
                     {
                        if (!BAND_EMPTY(Bands[b]))
                        {
                           if (b != j)
                              Bands[j] = Bands[b];
                           j++;
                        }
                        else
                           empty_band_count++;
                     }

                     if (j > 0)
                     {
                        if (j == 1)
                        {
                           j = 0;
                           // Easy case to deal with, so special case it.

                           if (Bands[0].Left > 0)
                           {
                              pClip->Left[j][w] = 0;
                              pClip->Right[j++][w] = Bands[0].Left + 1;
                           }
                           if (Bands[0].Right < 256)
                           {
                              pClip->Left[j][w] = Bands[0].Right;
                              pClip->Right[j++][w] = 256;
                           }
                           if (j == 0)
                           {
                              pClip->Left[j][w] = 1;
                              pClip->Right[j++][w] = 0;
                           }
                        }
                        else
                        {
                           // Now sort the bands into order
                           B = j;
                           qsort((void*) Bands, B,
                                 sizeof(Bands [0]), BandCompare);

                           // Now invert the area the bands cover
                           j = 0;
                           for (b = 0; b < B; b++)
                           {
                              if (b == 0 && Bands[b].Left > 0)
                              {
                                 pClip->Left[j][w] = 0;
                                 pClip->Right[j++][w] = Bands[b].Left + 1;
                              }
                              else if (b == B - 1 && Bands[b].Right < 256)
                              {
                                 pClip->Left[j][w] = Bands[b].Right;
                                 pClip->Right[j++][w] = 256;
                              }
                              if (b < B - 1)
                              {
                                 pClip->Left[j][w] = Bands[b].Right;
                                 pClip->Right[j++][w] = Bands[b + 1].Left + 1;
                              }
                           }
                        }
                     }
                     else
                     {
                        // Inverting a window that consisted of only
                        // empty bands is the whole width of the screen.
                        // Needed for Mario Kart's rear-view mirror display.
                        if (empty_band_count)
                        {
                           pClip->Left[j][w] = 0;
                           pClip->Right[j][w] = 256;
                           j++;
                        }
                     }
                     pClip->Count[w] = j;
                  }
                  else
                  {
                     int j;
                     for (j = 0; j < B; j++)
                     {
                        pClip->Left[j][w] = Bands[j].Left;
                        pClip->Right[j][w] = Bands[j].Right;
                     }
                     pClip->Count [w] = B;
                  }
               }
               else
               {
                  // Only one window enabled so no need to perform
                  // complex overlap logic...

                  if (Window1Enabled)
Exemplo n.º 2
0
void ComputeClipWindow(bool8_32 invert, int w, int wok, ClipData* pClip)
{
   pClip->Count[w] = 0;

   if (!Settings.DisableGraphicWindows)
   {
      if (pClip->Count [5] || wok)
      {
         struct Band Win1[3];
         struct Band Win2[3];
         uint32 Window1Enabled = 0;
         uint32 Window2Enabled = 0;
         if (wok)
         {
            if (PPU.ClipWindow1Enable [w])
            {
               if (!PPU.ClipWindow1Inside [w])
               {
                  Win1[0].Left = PPU.Window1Left;
                  Win1[0].Right = PPU.Window1Right + 1;
                  Window1Enabled = 1;
               }
               else
               {
                  if (PPU.Window1Left <= PPU.Window1Right)
                  {
                     if (PPU.Window1Left > 0)
                     {
                        Win1[0].Left = 0;
                        Win1[0].Right = PPU.Window1Left;
                        Window1Enabled = 1;
                     }
                     if (PPU.Window1Right < 255)
                     {
                        Win1[Window1Enabled].Left = PPU.Window1Right + 1;
                        Win1[Window1Enabled++].Right = 256;
                     }
                     if (Window1Enabled == 0)
                     {
                        Win1[0].Left = 1;
                        Win1[0].Right = 0;
                        Window1Enabled = 1;
                     }
                  }
                  else
                  {
                     // 'outside' a window with no range -
                     // appears to be the whole screen.
                     Win1[0].Left = 0;
                     Win1[0].Right = 256;
                     Window1Enabled = 1;
                  }
               }
            }
            if (PPU.ClipWindow2Enable [w])
            {
               if (!PPU.ClipWindow2Inside [w])
               {
                  Win2[0].Left = PPU.Window2Left;
                  Win2[0].Right = PPU.Window2Right + 1;
                  Window2Enabled = 1;
               }
               else
               {
                  if (PPU.Window2Left <= PPU.Window2Right)
                  {
                     if (PPU.Window2Left > 0)
                     {
                        Win2[0].Left = 0;
                        Win2[0].Right = PPU.Window2Left;
                        Window2Enabled = 1;
                     }
                     if (PPU.Window2Right < 255)
                     {
                        Win2[Window2Enabled].Left = PPU.Window2Right + 1;
                        Win2[Window2Enabled++].Right = 256;
                     }
                     if (Window2Enabled == 0)
                     {
                        Win2[0].Left = 1;
                        Win2[0].Right = 0;
                        Window2Enabled = 1;
                     }
                  }
                  else
                  {
                     Win2[0].Left = 0;
                     Win2[0].Right = 256;
                     Window2Enabled = 1;
                  }
               }
            }
         }
         if (Window1Enabled && Window2Enabled)
         {
            // Overlap logic
            //
            // Each window will be in one of three states:
            // 1. <no range> (Left > Right. One band)
            // 2. |    ----------------             | (Left >= 0, Right <= 255, Left <= Right. One band)
            // 3. |------------           ----------| (Left1 == 0, Right1 < Left2; Left2 > Right1, Right2 == 255. Two bands)

            struct Band Bands [6];
            int B = 0;
            switch (PPU.ClipWindowOverlapLogic [w] ^ 1)
            {
            case CLIP_OR:
               if (Window1Enabled == 1)
               {
                  if (BAND_EMPTY(Win1[0]))
                  {
                     B = Window2Enabled;
                     memmove(Bands, Win2,
                             sizeof(Win2[0]) * Window2Enabled);
                  }
                  else
                  {
                     if (Window2Enabled == 1)
                     {
                        if (BAND_EMPTY(Win2[0]))
                           Bands[B++] = Win1[0];
                        else
                        {
                           if (BANDS_INTERSECT(Win1[0], Win2[0]))
                           {
                              OR_BANDS(Bands[0], Win1[0], Win2[0])
                              B = 1;
                           }
                           else
                           {
                              Bands[B++] = Win1[0];
                              Bands[B++] = Win2[0];
                           }
                        }
                     }
                     else
                     {
                        if (BANDS_INTERSECT(Win1[0], Win2[0]))
                        {
                           OR_BANDS(Bands[0], Win1[0], Win2[0])
                           if (BANDS_INTERSECT(Win1[0], Win2[1]))
                              OR_BANDS(Bands[1], Win1[0], Win2[1])
                              else
                                 Bands[1] = Win2[1];
                           B = 1;
                           if (BANDS_INTERSECT(Bands[0], Bands[1]))
                              OR_BANDS(Bands[0], Bands[0], Bands[1])
                              else
                                 B = 2;
                        }
                        else if (BANDS_INTERSECT(Win1[0], Win2[1]))
                        {
                           Bands[B++] = Win2[0];
                           OR_BANDS(Bands[B], Win1[0], Win2[1]);
                           B++;
                        }
                        else
                        {
                           Bands[0] = Win2[0];
                           Bands[1] = Win1[0];
                           Bands[2] = Win2[1];
                           B = 3;
                        }
                     }
                  }
               }
               else if (Window2Enabled == 1)
               {
                  if (BAND_EMPTY(Win2[0]))
                  {
                     // Window 2 defines an empty range - just
                     // use window 1 as the clipping (which
                     // could also be empty).
                     B = Window1Enabled;
                     memmove(Bands, Win1,
                             sizeof(Win1[0]) * Window1Enabled);
                  }
                  else
                  {
                     // Window 1 has two bands and Window 2 has one.
                     // Neither is an empty region.
                     if (BANDS_INTERSECT(Win2[0], Win1[0]))
                     {
                        OR_BANDS(Bands[0], Win2[0], Win1[0])
                        if (BANDS_INTERSECT(Win2[0], Win1[1]))
                           OR_BANDS(Bands[1], Win2[0], Win1[1])
                           else
                              Bands[1] = Win1[1];
                        B = 1;
                        if (BANDS_INTERSECT(Bands[0], Bands[1]))
                           OR_BANDS(Bands[0], Bands[0], Bands[1])
                           else
                              B = 2;
                     }
                     else if (BANDS_INTERSECT(Win2[0], Win1[1]))
                     {
                        Bands[B++] = Win1[0];
                        OR_BANDS(Bands[B], Win2[0], Win1[1]);
                        B++;
                     }
                     else
                     {
                        Bands[0] = Win1[0];
                        Bands[1] = Win2[0];
                        Bands[2] = Win1[1];
                        B = 3;
                     }
                  }
               }
               else
               {
                  // Both windows have two bands
                  OR_BANDS(Bands[0], Win1[0], Win2[0]);
                  OR_BANDS(Bands[1], Win1[1], Win2[1]);
                  B = 1;
                  if (BANDS_INTERSECT(Bands[0], Bands[1]))
                     OR_BANDS(Bands[0], Bands[0], Bands[1])
                     else
                        B = 2;
               }
               break;

            case CLIP_AND:
               if (Window1Enabled == 1)
               {
                  // Window 1 has one band
                  if (BAND_EMPTY(Win1[0]))
                     Bands [B++] = Win1[0];
                  else if (Window2Enabled == 1)
                  {
                     if (BAND_EMPTY(Win2[0]))
                        Bands [B++] = Win2[0];
                     else
                     {
                        AND_BANDS(Bands[0], Win1[0], Win2[0]);
                        B = 1;
                     }
                  }
                  else
                  {
                     AND_BANDS(Bands[0], Win1[0], Win2[0]);
                     AND_BANDS(Bands[1], Win1[0], Win2[1]);
                     B = 2;
                  }
               }
               else if (Window2Enabled == 1)
               {
                  if (BAND_EMPTY(Win2[0]))
                     Bands[B++] = Win2[0];
                  else
                  {
                     // Window 1 has two bands.
                     AND_BANDS(Bands[0], Win1[0], Win2[0]);
                     AND_BANDS(Bands[1], Win1[1], Win2[0]);
                     B = 2;
                  }
               }
               else
               {
                  // Both windows have two bands.
                  AND_BANDS(Bands[0], Win1[0], Win2[0]);
                  AND_BANDS(Bands[1], Win1[1], Win2[1]);
                  B = 2;
                  if (BANDS_INTERSECT(Win1[0], Win2[1]))
                  {
                     AND_BANDS(Bands[2], Win1[0], Win2[1]);
                     B = 3;
                  }
                  else if (BANDS_INTERSECT(Win1[1], Win2[0]))
                  {
                     AND_BANDS(Bands[2], Win1[1], Win2[0]);
                     B = 3;
                  }
               }
               break;
            case CLIP_XNOR:
               invert = !invert;
            // Fall...

            case CLIP_XOR:
               if (Window1Enabled == 1 && BAND_EMPTY(Win1[0]))
               {
                  B = Window2Enabled;
                  memmove(Bands, Win2,
                          sizeof(Win2[0]) * Window2Enabled);
               }
               else if (Window2Enabled == 1 && BAND_EMPTY(Win2[0]))
               {
                  B = Window1Enabled;
                  memmove(Bands, Win1,
                          sizeof(Win1[0]) * Window1Enabled);
               }
               else
               {
                  uint32 p = 0;
                  uint32 points [10];
                  uint32 i;

                  invert = !invert;
                  // Build an array of points (window edges)
                  points [p++] = 0;
                  for (i = 0; i < Window1Enabled; i++)
                  {
                     points [p++] = Win1[i].Left;
                     points [p++] = Win1[i].Right;
                  }
                  for (i = 0; i < Window2Enabled; i++)
                  {
                     points [p++] = Win2[i].Left;
                     points [p++] = Win2[i].Right;
                  }
                  points [p++] = 256;
                  // Sort them
                  qsort((void*) points, p, sizeof(points [0]),
                        IntCompare);
                  for (i = 0; i < p; i += 2)
                  {
                     if (points [i] == points [i + 1])
                        continue;
                     Bands [B].Left = points [i];
                     while (i + 2 < p &&
                            points [i + 1] == points [i + 2])
                        i += 2;
                     Bands [B++].Right = points [i + 1];
                  }
               }
               break;
            }