Initial community commit

1 files changed, 584 insertions, 0 deletions

diff --git a/Src/Winamp/plush/PF_TEX.C b/Src/Winamp/plush/PF_TEX.C
new file mode 100644
index 00000000..b9879169
--- /dev/null
+++ b/Src/Winamp/plush/PF_TEX.C
@@ -0,0 +1,584 @@
+/******************************************************************************
+Plush Version 1.2
+pf_tex.c
+Affine Texture Mapping Rasterizers
+Copyright (c) 1996-2000, Justin Frankel
+******************************************************************************/
+
+#include "plush.h"
+#include "putface.h"
+
+
+void plPF_TexEnv(pl_Cam *cam, pl_Face *TriFace) {
+  pl_uChar i0, i1, i2;
+  pl_uChar *gmem = cam->frameBuffer;
+  pl_uChar *remap;
+  pl_ZBuffer *zbuf = cam->zBuffer;
+
+  pl_sInt32 MappingU1, MappingU2, MappingU3;
+  pl_sInt32 MappingV1, MappingV2, MappingV3;
+  pl_sInt32 MappingU_AND, MappingV_AND;
+  pl_sInt32 eMappingU1, eMappingU2, eMappingU3;
+  pl_sInt32 eMappingV1, eMappingV2, eMappingV3;
+  pl_sInt32 eMappingU_AND, eMappingV_AND;
+
+  pl_uChar *texture, *environment;
+  pl_uChar vshift;
+  pl_uChar evshift;
+  pl_uInt16 *addtable;
+  pl_Texture *Texture, *Environment;
+  pl_uChar stat;
+  pl_Bool zb = (zbuf&&TriFace->Material->zBufferable) ? 1 : 0;
+
+  pl_sInt32 U1, V1, U2, V2, dU1=0, dU2=0, dV1=0, dV2=0, dUL=0, dVL=0, UL, VL;
+  pl_sInt32 eU1, eV1, eU2, eV2, edU1=0, edU2=0, edV1=0,
+            edV2=0, edUL=0, edVL=0, eUL, eVL;
+  pl_sInt32 X1, X2, dX1=0, dX2=0, XL1, XL2;
+  pl_Float Z1, ZL, dZ1=0, dZ2=0, dZL=0, Z2;
+  pl_sInt32 Y1, Y2, Y0, dY;
+
+  Environment = TriFace->Material->Environment;
+  Texture = TriFace->Material->Texture;
+
+  if (!Texture || !Environment) return;
+  texture = Texture->Data;
+  environment = Environment->Data;
+  addtable = TriFace->Material->_AddTable;
+  remap = TriFace->Material->_ReMapTable;
+
+  MappingV_AND = ((1<<Texture->Height)-1)<<Texture->Width;
+  MappingU_AND = (1<<Texture->Width)-1;
+  vshift = 16 - Texture->Width;
+  eMappingV_AND = ((1<<Environment->Height)-1)<<Environment->Width;
+  eMappingU_AND = (1<<Environment->Width)-1;
+  evshift = 16 - Environment->Width;
+
+  PUTFACE_SORT_TEX();
+
+  eMappingU1=(pl_sInt32) (TriFace->eMappingU[i0]*Environment->uScale*TriFace->Material->EnvScaling);
+  eMappingV1=(pl_sInt32) (TriFace->eMappingV[i0]*Environment->vScale*TriFace->Material->EnvScaling);
+  eMappingU2=(pl_sInt32) (TriFace->eMappingU[i1]*Environment->uScale*TriFace->Material->EnvScaling);
+  eMappingV2=(pl_sInt32) (TriFace->eMappingV[i1]*Environment->vScale*TriFace->Material->EnvScaling);
+  eMappingU3=(pl_sInt32) (TriFace->eMappingU[i2]*Environment->uScale*TriFace->Material->EnvScaling);
+  eMappingV3=(pl_sInt32) (TriFace->eMappingV[i2]*Environment->vScale*TriFace->Material->EnvScaling);
+
+  U1 = U2 = MappingU1;
+  V1 = V2 = MappingV1;
+  eU1 = eU2 = eMappingU1;
+  eV1 = eV2 = eMappingV1;
+  X2 = X1 = TriFace->Scrx[i0];
+  Z2 = Z1 = TriFace->Scrz[i0];
+  Y0 = (TriFace->Scry[i0]+(1<<19))>>20;
+  Y1 = (TriFace->Scry[i1]+(1<<19))>>20;
+  Y2 = (TriFace->Scry[i2]+(1<<19))>>20;
+
+  dY = Y2 - Y0;
+  if (dY) {
+    dU2 = (MappingU3 - U1) / dY;
+    dV2 = (MappingV3 - V1) / dY;
+    edU2 = (eMappingU3 - eU1) / dY;
+    edV2 = (eMappingV3 - eV1) / dY;
+    dX2 = (TriFace->Scrx[i2] - X1) / dY;
+    dZ2 = (TriFace->Scrz[i2] - Z1) / dY;
+  }
+  dY = Y1-Y0;
+  if (dY) {
+    dX1 = (TriFace->Scrx[i1] - X1) / dY;
+    dU1 = (MappingU2 - U1) / dY;
+    dV1 = (MappingV2 - V1) / dY;
+    edU1 = (eMappingU2 - eU1) / dY;
+    edV1 = (eMappingV2 - eV1) / dY;
+    dZ1 = (TriFace->Scrz[i1] - Z1) / dY;
+    if (dX2 < dX1) {
+      dX2 ^= dX1; dX1 ^= dX2; dX2 ^= dX1;
+      dU2 ^= dU1; dU1 ^= dU2; dU2 ^= dU1;
+      dV2 ^= dV1; dV1 ^= dV2; dV2 ^= dV1;
+      edU2 ^= edU1; edU1 ^= edU2; edU2 ^= edU1;
+      edV2 ^= edV1; edV1 ^= edV2; edV2 ^= edV1;
+      dZL = dZ1; dZ1 = dZ2; dZ2 = dZL;
+      stat = 2;
+    } else stat = 1;
+  } else {
+    if (TriFace->Scrx[i1] > X1) {
+      X2 = TriFace->Scrx[i1];
+      Z2 = TriFace->Scrz[i1];
+      U2 = MappingU2;
+      V2 = MappingV2;
+      eU2 = eMappingU2;
+      eV2 = eMappingV2;
+      stat = 2|4;
+    } else {
+      X1 = TriFace->Scrx[i1];
+      Z1 = TriFace->Scrz[i1];
+      U1 = MappingU2;
+      V1 = MappingV2;
+      eU1 = eMappingU2;
+      eV1 = eMappingV2;
+      stat = 1|8;
+    }
+  }
+
+  gmem += (Y0 * cam->ScreenWidth);
+  zbuf += (Y0 * cam->ScreenWidth);
+
+  XL1 = (((dX1-dX2)*dY+(1<<19))>>20);
+  if (XL1) {
+    dUL = ((dU1-dU2)*dY)/XL1;
+    dVL = ((dV1-dV2)*dY)/XL1;
+    edUL = ((edU1-edU2)*dY)/XL1;
+    edVL = ((edV1-edV2)*dY)/XL1;
+    dZL = ((dZ1-dZ2)*dY)/XL1;
+  } else {
+    XL1 = ((X2-X1+(1<<19))>>20);
+    if (XL1) {
+      edUL = (eU2-eU1)/XL1;
+      edVL = (eV2-eV1)/XL1;
+      dUL = (U2-U1)/XL1;
+      dVL = (V2-V1)/XL1;
+      dZL = (Z2-Z1)/XL1;
+    }
+  }
+
+  while (Y0 < Y2) {
+    if (Y0 == Y1) {
+      dY = Y2 - ((TriFace->Scry[i1]+(1<<19))>>20);
+      if (dY) {
+        if (stat & 1) {
+          X1 = TriFace->Scrx[i1];
+          dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
+        }
+        if (stat & 2) {
+          X2 = TriFace->Scrx[i1];
+          dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
+        }
+        if (stat & 4) {
+          X1 = TriFace->Scrx[i0];
+          dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
+        }
+        if (stat & 8) {
+          X2 = TriFace->Scrx[i0];
+          dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
+        }
+        dZ1 = (TriFace->Scrz[i2]-Z1)/dY;
+        dV1 = (MappingV3 - V1) / dY;
+        dU1 = (MappingU3 - U1) / dY;
+        edV1 = (eMappingV3 - eV1) / dY;
+        edU1 = (eMappingU3 - eU1) / dY;
+      }
+    }
+    XL1 = (X1+(1<<19))>>20;
+    XL2 = (X2+(1<<19))>>20;
+    ZL = Z1;
+    UL = U1;
+    VL = V1;
+    eUL = eU1;
+    eVL = eV1;
+    if ((XL2-XL1) > 0) {
+      XL2 -= XL1;
+      gmem += XL1;
+      zbuf += XL1;
+      XL1 += XL2;
+      if (zb) do {
+          if (*zbuf < ZL) {
+            *zbuf = ZL;
+            *gmem = remap[addtable[environment[
+                ((eUL>>16)&eMappingU_AND)+((eVL>>evshift)&eMappingV_AND)]] +
+                            texture[((UL>>16)&MappingU_AND) +
+                                    ((VL>>vshift)&MappingV_AND)]];
+          }
+          zbuf++;
+          gmem++;
+          ZL += dZL;
+          UL += dUL;
+          VL += dVL;
+          eUL += edUL;
+          eVL += edVL;
+        } while (--XL2);
+      else do {
+          *gmem++ = remap[addtable[environment[
+              ((eUL>>16)&eMappingU_AND)+((eVL>>evshift)&eMappingV_AND)]] +
+                          texture[((UL>>16)&MappingU_AND) +
+                                  ((VL>>vshift)&MappingV_AND)]];
+          UL += dUL;
+          VL += dVL;
+          eUL += edUL;
+          eVL += edVL;
+        } while (--XL2);
+      gmem -= XL1;
+      zbuf -= XL1;
+    }
+    zbuf += cam->ScreenWidth;
+    gmem += cam->ScreenWidth;
+    Z1 += dZ1;
+    X1 += dX1;
+    X2 += dX2;
+    U1 += dU1;
+    V1 += dV1;
+    eU1 += edU1;
+    eV1 += edV1;
+    Y0++;
+  }
+}
+
+void plPF_TexF(pl_Cam *cam, pl_Face *TriFace) {
+  pl_uChar i0, i1, i2;
+  pl_uChar *gmem = cam->frameBuffer;
+  pl_ZBuffer *zbuf = cam->zBuffer;
+  pl_sInt32 MappingU1, MappingU2, MappingU3;
+  pl_sInt32 MappingV1, MappingV2, MappingV3;
+  pl_sInt32 MappingU_AND, MappingV_AND;
+  pl_uChar *texture;
+  pl_uChar vshift;
+  pl_uInt bc;
+  pl_uChar *remap;
+  pl_Texture *Texture;
+  pl_uChar stat;
+
+  pl_ZBuffer Z1, ZL, dZ1=0, dZL=0, Z2, dZ2=0;
+  pl_sInt32 dU1=0, dV1=0, dU2=0, dV2=0, U1, V1, U2, V2;
+  pl_sInt32 dUL=0, dVL=0, UL, VL;
+  pl_sInt32 X1, X2, dX1=0, dX2=0, XL1, XL2;
+  pl_sInt32 Y1, Y2, Y0, dY;
+  pl_Bool zb = (zbuf&&TriFace->Material->zBufferable) ? 1 : 0;
+  pl_sInt shade;
+
+  if (TriFace->Material->Environment) Texture = TriFace->Material->Environment;
+  else Texture = TriFace->Material->Texture;
+
+  if (!Texture) return;
+  remap = TriFace->Material->_ReMapTable;
+  if (TriFace->Material->_AddTable)
+  {
+    shade=(pl_sInt)(TriFace->fShade*255.0f);
+    if (shade < 0) shade=0;
+    if (shade > 255) shade=255;
+    bc = TriFace->Material->_AddTable[shade];
+  }
+  else bc=0;
+  texture = Texture->Data;
+  vshift = 16 - Texture->Width;
+  MappingV_AND = ((1<<Texture->Height)-1)<<Texture->Width;
+  MappingU_AND = (1<<Texture->Width)-1;
+
+  if (TriFace->Material->Environment) {
+    PUTFACE_SORT_ENV();
+  } else {
+    PUTFACE_SORT_TEX();
+  }
+
+  U1 = U2 = MappingU1;
+  V1 = V2 = MappingV1;
+  X2 = X1 = TriFace->Scrx[i0];
+  Z2 = Z1 = TriFace->Scrz[i0];
+  Y0 = (TriFace->Scry[i0]+(1<<19))>>20;
+  Y1 = (TriFace->Scry[i1]+(1<<19))>>20;
+  Y2 = (TriFace->Scry[i2]+(1<<19))>>20;
+
+  dY = Y2 - Y0;
+  if (dY) {
+    dX2 = (TriFace->Scrx[i2] - X1) / dY;
+    dV2 = (MappingV3 - V1) / dY;
+    dU2 = (MappingU3 - U1) / dY;
+    dZ2 = (TriFace->Scrz[i2] - Z1) / dY;
+  }
+  dY = Y1-Y0;
+  if (dY) {
+    dX1 = (TriFace->Scrx[i1] - X1) / dY;
+    dZ1 = (TriFace->Scrz[i1] - Z1) / dY;
+    dU1 = (MappingU2 - U1) / dY;
+    dV1 = (MappingV2 - V1) / dY;
+    if (dX2 < dX1) {
+      dX2 ^= dX1; dX1 ^= dX2; dX2 ^= dX1;
+      dU2 ^= dU1; dU1 ^= dU2; dU2 ^= dU1;
+      dV2 ^= dV1; dV1 ^= dV2; dV2 ^= dV1;
+      dZL = dZ1; dZ1 = dZ2; dZ2 = dZL;
+      stat = 2;
+    } else stat = 1;
+  } else {
+    if (TriFace->Scrx[i1] > X1) {
+      X2 = TriFace->Scrx[i1];
+      Z2 = TriFace->Scrz[i1];
+      U2 = MappingU2;
+      V2 = MappingV2;
+      stat = 2|4;
+    } else {
+      X1 = TriFace->Scrx[i1];
+      Z1 = TriFace->Scrz[i1];
+      U1 = MappingU2;
+      V1 = MappingV2;
+      stat = 1|8;
+    }
+  }
+
+  gmem += (Y0 * cam->ScreenWidth);
+  zbuf += (Y0 * cam->ScreenWidth);
+
+  XL1 = (((dX1-dX2)*dY+(1<<19))>>20);
+  if (XL1) {
+    dUL = ((dU1-dU2)*dY)/XL1;
+    dVL = ((dV1-dV2)*dY)/XL1;
+    dZL = ((dZ1-dZ2)*dY)/XL1;
+  } else {
+    XL1 = ((X2-X1+(1<<19))>>20);
+    if (XL1) {
+      dUL = (U2-U1)/XL1;
+      dVL = (V2-V1)/XL1;
+      dZL = (Z2-Z1)/XL1;
+    }
+  }
+
+  while (Y0 < Y2) {
+    if (Y0 == Y1) {
+      dY = Y2 - ((TriFace->Scry[i1]+(1<<19))>>20);
+      if (dY) {
+        if (stat & 1) {
+          X1 = TriFace->Scrx[i1];
+          dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
+        }
+        if (stat & 2) {
+          X2 = TriFace->Scrx[i1];
+          dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
+        }
+        if (stat & 4) {
+          X1 = TriFace->Scrx[i0];
+          dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
+        }
+        if (stat & 8) {
+          X2 = TriFace->Scrx[i0];
+          dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
+        }
+        dZ1 = (TriFace->Scrz[i2]-Z1) / dY;
+        dV1 = (MappingV3 - V1) / dY;
+        dU1 = (MappingU3 - U1) / dY;
+      }
+    }
+    XL1 = (X1+(1<<19))>>20;
+    XL2 = (X2+(1<<19))>>20;
+    ZL = Z1;
+    UL = U1;
+    VL = V1;
+    if ((XL2-XL1) > 0) {
+      XL2 -= XL1;
+      gmem += XL1;
+      zbuf += XL1;
+      XL1 += XL2;
+      if (zb) do {
+          if (*zbuf < ZL) {
+            *zbuf = ZL;
+            *gmem = remap[bc + texture[((UL >> 16)&MappingU_AND) +
+                                ((VL>>vshift)&MappingV_AND)]];
+          }
+          zbuf++;
+          gmem++;
+          ZL += dZL;
+          UL += dUL;
+          VL += dVL;
+        } while (--XL2);
+      else do {
+          *gmem++ = remap[bc + texture[((UL >> 16)&MappingU_AND) +
+                                ((VL>>vshift)&MappingV_AND)]];
+          UL += dUL;
+          VL += dVL;
+        } while (--XL2);
+      gmem -= XL1;
+      zbuf -= XL1;
+    }
+    zbuf += cam->ScreenWidth;
+    gmem += cam->ScreenWidth;
+    X1 += dX1;
+    X2 += dX2;
+    U1 += dU1;
+    V1 += dV1;
+    Z1 += dZ1;
+    Y0++;
+  }
+}
+
+void plPF_TexG(pl_Cam *cam, pl_Face *TriFace) {
+  pl_uChar i0, i1, i2;
+  pl_uChar *gmem = cam->frameBuffer;
+  pl_ZBuffer *zbuf = cam->zBuffer;
+  pl_sInt32 MappingU1, MappingU2, MappingU3;
+  pl_sInt32 MappingV1, MappingV2, MappingV3;
+  pl_sInt32 MappingU_AND, MappingV_AND;
+  pl_uChar *texture;
+  pl_uChar *remap;
+  pl_uChar vshift;
+  pl_uInt16 *addtable;
+  pl_Texture *Texture;
+
+  pl_sInt32 U1, V1, U2, V2, dU1=0, dU2=0, dV1=0, dV2=0, dUL=0, dVL=0, UL, VL;
+  pl_sInt32 X1, X2, dX1=0, dX2=0, XL1, XL2;
+  pl_sInt32 C1, C2, dC1=0, dC2=0, CL, dCL=0;
+  pl_ZBuffer Z1, ZL, dZ1=0, dZ2=0, dZL=0, Z2;
+  pl_sInt32 Y1, Y2, Y0, dY;
+  pl_uChar stat;
+
+  pl_Bool zb = (zbuf&&TriFace->Material->zBufferable) ? 1 : 0;
+
+  if (TriFace->Material->Environment) Texture = TriFace->Material->Environment;
+  else Texture = TriFace->Material->Texture;
+
+  if (!Texture) return;
+  remap = TriFace->Material->_ReMapTable;
+  texture = Texture->Data;
+  addtable = TriFace->Material->_AddTable;
+  vshift = 16 - Texture->Width;
+  MappingV_AND = ((1<<Texture->Height)-1)<<Texture->Width;
+  MappingU_AND = (1<<Texture->Width)-1;
+
+  if (TriFace->Material->Environment) {
+    PUTFACE_SORT_ENV();
+  } else {
+    PUTFACE_SORT_TEX();
+  }
+
+  C1 = C2 = TriFace->Shades[i0]*65535.0f;
+  U1 = U2 = MappingU1;
+  V1 = V2 = MappingV1;
+  X2 = X1 = TriFace->Scrx[i0];
+  Z2 = Z1 = TriFace->Scrz[i0];
+  Y0 = (TriFace->Scry[i0]+(1<<19))>>20;
+  Y1 = (TriFace->Scry[i1]+(1<<19))>>20;
+  Y2 = (TriFace->Scry[i2]+(1<<19))>>20;
+
+  dY = Y2 - Y0;
+  if (dY) {
+    dX2 = (TriFace->Scrx[i2] - X1) / dY;
+    dZ2 = (TriFace->Scrz[i2] - Z1) / dY;
+    dC2 = (TriFace->Shades[i2]*65535.0f - C1) / dY;
+    dU2 = (MappingU3 - U1) / dY;
+    dV2 = (MappingV3 - V1) / dY;
+  }
+  dY = Y1-Y0;
+  if (dY) {
+    dX1 = (TriFace->Scrx[i1] - X1) / dY;
+    dZ1 = (TriFace->Scrz[i1] - Z1) / dY;
+    dC1 = (TriFace->Shades[i1]*65535.0f - C1) / dY;
+    dU1 = (MappingU2 - U1) / dY;
+    dV1 = (MappingV2 - V1) / dY;
+    if (dX2 < dX1) {
+      dX2 ^= dX1; dX1 ^= dX2; dX2 ^= dX1;
+      dU2 ^= dU1; dU1 ^= dU2; dU2 ^= dU1;
+      dV2 ^= dV1; dV1 ^= dV2; dV2 ^= dV1;
+      dC2 ^= dC1; dC1 ^= dC2; dC2 ^= dC1;
+      dZL = dZ1; dZ1 = dZ2; dZ2 = dZL;
+      stat = 2;
+    } else stat = 1;
+  } else {
+    if (TriFace->Scrx[i1] > X1) {
+      X2 = TriFace->Scrx[i1];
+      Z2 = TriFace->Scrz[i1];
+      C2 = TriFace->Shades[i1]*65535.0f;
+      U2 = MappingU2;
+      V2 = MappingV2;
+      stat = 2|4;
+    } else {
+      X1 = TriFace->Scrx[i1];
+      Z1 = TriFace->Scrz[i1];
+      C1 = TriFace->Shades[i1]*65535.0f;
+      U1 = MappingU2;
+      V1 = MappingV2;
+      stat = 1|8;
+    }
+  }
+
+  gmem += (Y0 * cam->ScreenWidth);
+  zbuf += (Y0 * cam->ScreenWidth);
+
+  XL1 = (((dX1-dX2)*dY+(1<<19))>>20);
+  if (XL1) {
+    dUL = ((dU1-dU2)*dY)/XL1;
+    dVL = ((dV1-dV2)*dY)/XL1;
+    if (zb) dZL = ((dZ1-dZ2)*dY)/XL1;
+    dCL = ((dC1-dC2)*dY)/XL1;
+  } else {
+    XL1 = ((X2-X1+(1<<19))>>20);
+    if (XL1) {
+      dUL = (U2-U1)/XL1;
+      dVL = (V2-V1)/XL1;
+      if (zb) dZL = (Z2-Z1)/XL1;
+      dCL = (C2-C1)/(XL1);
+    }
+  }
+  while (Y0 < Y2) {
+    if (Y0 == Y1) {
+      dY = Y2 - ((TriFace->Scry[i1]+(1<<19))>>20);
+      if (dY) {
+        if (stat & 1) {
+          X1 = TriFace->Scrx[i1];
+          dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
+        }
+        if (stat & 2) {
+          X2 = TriFace->Scrx[i1];
+          dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i1])/dY;
+        }
+        if (stat & 4) {
+          X1 = TriFace->Scrx[i0];
+          dX1 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
+        }
+        if (stat & 8) {
+          X2 = TriFace->Scrx[i0];
+          dX2 = (TriFace->Scrx[i2]-TriFace->Scrx[i0])/dY;
+        }
+        dZ1 = (TriFace->Scrz[i2]-Z1)/dY;
+        dV1 = (MappingV3 - V1) / dY;
+        dU1 = (MappingU3 - U1) / dY;
+        dC1 = (TriFace->Shades[i2]*65535.0f-C1)/dY;
+      }
+    }
+    XL1 = (X1+(1<<19))>>20;
+    XL2 = (X2+(1<<19))>>20;
+    CL = C1;
+    ZL = Z1;
+    UL = U1;
+    VL = V1;
+    if ((XL2-XL1) > 0) {
+      XL2 -= XL1;
+      gmem += XL1;
+      zbuf += XL1;
+      XL1 += XL2;
+      if (zb) do {
+          if (*zbuf < ZL) {
+            int av;
+            if (CL < 0) av=addtable[0];
+            else if (CL > (255<<8)) av=addtable[255];
+            else av=addtable[CL>>8];
+            *zbuf = ZL;
+            *gmem = remap[av +
+                            texture[((UL>>16)&MappingU_AND) +
+                                    ((VL>>vshift)&MappingV_AND)]];
+          }
+          zbuf++;
+          gmem++;
+          ZL += dZL;
+          CL += dCL;
+          UL += dUL;
+          VL += dVL;
+        } while (--XL2);
+      else do {
+          int av;
+          if (CL < 0) av=addtable[0];
+          else if (CL > (255<<8)) av=addtable[255];
+          else av=addtable[CL>>8];
+          *gmem++ = remap[av +
+                          texture[((UL>>16)&MappingU_AND) +
+                                  ((VL>>vshift)&MappingV_AND)]];
+          CL += dCL;
+          UL += dUL;
+          VL += dVL;
+        } while (--XL2);
+      gmem -= XL1;
+      zbuf -= XL1;
+    }
+    zbuf += cam->ScreenWidth;
+    gmem += cam->ScreenWidth;
+    Z1 += dZ1;
+    X1 += dX1;
+    X2 += dX2;
+    C1 += dC1;
+    U1 += dU1;
+    V1 += dV1;
+    Y0++;
+  }
+}