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winamp/Src/Winamp/plush/PF_TEX.C
Jef 20d28e80a5 Initial community commit
2024-09-24 14:54:57 +02:00

585 lines
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/******************************************************************************
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++;
}
}
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