-/* $Id: s_tritemp.h,v 1.24 2001/08/14 14:08:44 brianp Exp $ */
+/* $Id: s_tritemp.h,v 1.25 2001/09/13 21:54:29 brianp Exp $ */
/*
* Mesa 3-D graphics library
{
typedef struct {
const SWvertex *v0, *v1; /* Y(v0) < Y(v1) */
- GLfloat dx; /* X(v1) - X(v0) */
- GLfloat dy; /* Y(v1) - Y(v0) */
- GLfixed fdxdy; /* dx/dy in fixed-point */
- GLfixed fsx; /* first sample point x coord */
- GLfixed fsy;
- GLfloat adjy; /* adjust from v[0]->fy to fsy, scaled */
- GLint lines; /* number of lines to be sampled on this edge */
- GLfixed fx0; /* fixed pt X of lower endpoint */
+ GLfloat dx; /* X(v1) - X(v0) */
+ GLfloat dy; /* Y(v1) - Y(v0) */
+ GLfixed fdxdy; /* dx/dy in fixed-point */
+ GLfixed fsx; /* first sample point x coord */
+ GLfixed fsy;
+ GLfloat adjy; /* adjust from v[0]->fy to fsy, scaled */
+ GLint lines; /* number of lines to be sampled on this edge */
+ GLfixed fx0; /* fixed pt X of lower endpoint */
} EdgeT;
#ifdef INTERP_Z
const GLfixed fy2 = FloatToFixed(v2->win[1] - 0.5F) & snapMask;
if (fy0 <= fy1) {
- if (fy1 <= fy2) {
+ if (fy1 <= fy2) {
/* y0 <= y1 <= y2 */
- vMin = v0; vMid = v1; vMax = v2;
+ vMin = v0; vMid = v1; vMax = v2;
vMin_fy = fy0; vMid_fy = fy1; vMax_fy = fy2;
- }
- else if (fy2 <= fy0) {
+ }
+ else if (fy2 <= fy0) {
/* y2 <= y0 <= y1 */
- vMin = v2; vMid = v0; vMax = v1;
+ vMin = v2; vMid = v0; vMax = v1;
vMin_fy = fy2; vMid_fy = fy0; vMax_fy = fy1;
- }
- else {
+ }
+ else {
/* y0 <= y2 <= y1 */
- vMin = v0; vMid = v2; vMax = v1;
+ vMin = v0; vMid = v2; vMax = v1;
vMin_fy = fy0; vMid_fy = fy2; vMax_fy = fy1;
bf = -bf;
- }
+ }
}
else {
- if (fy0 <= fy2) {
+ if (fy0 <= fy2) {
/* y1 <= y0 <= y2 */
- vMin = v1; vMid = v0; vMax = v2;
+ vMin = v1; vMid = v0; vMax = v2;
vMin_fy = fy1; vMid_fy = fy0; vMax_fy = fy2;
bf = -bf;
- }
- else if (fy2 <= fy1) {
+ }
+ else if (fy2 <= fy1) {
/* y2 <= y1 <= y0 */
- vMin = v2; vMid = v1; vMax = v0;
+ vMin = v2; vMid = v1; vMax = v0;
vMin_fy = fy2; vMid_fy = fy1; vMax_fy = fy0;
bf = -bf;
- }
- else {
+ }
+ else {
/* y1 <= y2 <= y0 */
- vMin = v1; vMid = v2; vMax = v0;
+ vMin = v1; vMid = v2; vMax = v0;
vMin_fy = fy1; vMid_fy = fy2; vMax_fy = fy0;
- }
+ }
}
/* fixed point X coords */
/* Do backface culling */
if (area * bf < 0.0)
- return;
+ return;
if (area == 0.0F)
return;
span.redStep = SignedFloatToFixed(drdx);
drdy = oneOverArea * (eMaj.dx * eBot_dr - eMaj_dr * eBot.dx);
eMaj_dg = (GLint) vMax->color[GCOMP] - (GLint) vMin->color[GCOMP];
- eBot_dg = (GLint) vMid->color[GCOMP] - (GLint) vMin->color[GCOMP];
+ eBot_dg = (GLint) vMid->color[GCOMP] - (GLint) vMin->color[GCOMP];
dgdx = oneOverArea * (eMaj_dg * eBot.dy - eMaj.dy * eBot_dg);
span.greenStep = SignedFloatToFixed(dgdx);
dgdy = oneOverArea * (eMaj.dx * eBot_dg - eMaj_dg * eBot.dx);
eBot_db = (GLint) vMid->color[BCOMP] - (GLint) vMin->color[BCOMP];
dbdx = oneOverArea * (eMaj_db * eBot.dy - eMaj.dy * eBot_db);
span.blueStep = SignedFloatToFixed(dbdx);
- dbdy = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
+ dbdy = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
# ifdef INTERP_ALPHA
eMaj_da = (GLint) vMax->color[ACOMP] - (GLint) vMin->color[ACOMP];
eBot_da = (GLint) vMid->color[ACOMP] - (GLint) vMin->color[ACOMP];
span.redStep = drdx;
drdy = oneOverArea * (eMaj.dx * eBot_dr - eMaj_dr * eBot.dx);
eMaj_dg = vMax->color[GCOMP] - vMin->color[GCOMP];
- eBot_dg = vMid->color[GCOMP] - vMin->color[GCOMP];
+ eBot_dg = vMid->color[GCOMP] - vMin->color[GCOMP];
dgdx = oneOverArea * (eMaj_dg * eBot.dy - eMaj.dy * eBot_dg);
span.greenStep = dgdx;
dgdy = oneOverArea * (eMaj.dx * eBot_dg - eMaj_dg * eBot.dx);
eBot_db = vMid->color[BCOMP] - vMin->color[BCOMP];
dbdx = oneOverArea * (eMaj_db * eBot.dy - eMaj.dy * eBot_db);
span.blueStep = dbdx;
- dbdy = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
+ dbdy = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
eMaj_da = vMax->color[ACOMP] - vMin->color[ACOMP];
eBot_da = vMid->color[ACOMP] - vMin->color[ACOMP];
dadx = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
span.specRedStep = SignedFloatToFixed(dsrdx);
dsrdy = oneOverArea * (eMaj.dx * eBot_dsr - eMaj_dsr * eBot.dx);
eMaj_dsg = (GLint) vMax->specular[GCOMP] - (GLint) vMin->specular[GCOMP];
- eBot_dsg = (GLint) vMid->specular[GCOMP] - (GLint) vMin->specular[GCOMP];
+ eBot_dsg = (GLint) vMid->specular[GCOMP] - (GLint) vMin->specular[GCOMP];
dsgdx = oneOverArea * (eMaj_dsg * eBot.dy - eMaj.dy * eBot_dsg);
span.specGreenStep = SignedFloatToFixed(dsgdx);
dsgdy = oneOverArea * (eMaj.dx * eBot_dsg - eMaj_dsg * eBot.dx);
eBot_dsb = (GLint) vMid->specular[BCOMP] - (GLint) vMin->specular[BCOMP];
dsbdx = oneOverArea * (eMaj_dsb * eBot.dy - eMaj.dy * eBot_dsb);
span.specBlueStep = SignedFloatToFixed(dsbdx);
- dsbdy = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
+ dsbdy = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
}
else {
dsrdx = dsrdy = 0.0F;
span.specRedStep = dsrdx;
dsrdy = oneOverArea * (eMaj.dx * eBot_dsr - eMaj_dsr * eBot.dx);
eMaj_dsg = vMax->specular[GCOMP] - vMin->specular[GCOMP];
- eBot_dsg = vMid->specular[GCOMP] - vMin->specular[GCOMP];
+ eBot_dsg = vMid->specular[GCOMP] - vMin->specular[GCOMP];
dsgdx = oneOverArea * (eMaj_dsg * eBot.dy - eMaj.dy * eBot_dsg);
span.specGreenStep = dsgdx;
dsgdy = oneOverArea * (eMaj.dx * eBot_dsg - eMaj_dsg * eBot.dx);
eBot_dsb = vMid->specular[BCOMP] - vMin->specular[BCOMP];
dsbdx = oneOverArea * (eMaj_dsb * eBot.dy - eMaj.dy * eBot_dsb);
span.specBlueStep = dsbdx;
- dsbdy = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
+ dsbdy = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
}
else {
dsrdx = dsrdy = span.specRedStep = 0;
- eMaj.dy * eBot_ds);
dsdy = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
- eMaj_dt = vMax->texcoord[0][1] * wMax - vMin->texcoord[0][1] * wMin;
- eBot_dt = vMid->texcoord[0][1] * wMid - vMin->texcoord[0][1] * wMin;
- span.texStep[0][1] = oneOverArea * (eMaj_dt * eBot.dy
+ eMaj_dt = vMax->texcoord[0][1] * wMax - vMin->texcoord[0][1] * wMin;
+ eBot_dt = vMid->texcoord[0][1] * wMid - vMin->texcoord[0][1] * wMin;
+ span.texStep[0][1] = oneOverArea * (eMaj_dt * eBot.dy
- eMaj.dy * eBot_dt);
- dtdy = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
+ dtdy = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
- eMaj_du = vMax->texcoord[0][2] * wMax - vMin->texcoord[0][2] * wMin;
- eBot_du = vMid->texcoord[0][2] * wMid - vMin->texcoord[0][2] * wMin;
- span.texStep[0][2] = oneOverArea * (eMaj_du * eBot.dy
+ eMaj_du = vMax->texcoord[0][2] * wMax - vMin->texcoord[0][2] * wMin;
+ eBot_du = vMid->texcoord[0][2] * wMid - vMin->texcoord[0][2] * wMin;
+ span.texStep[0][2] = oneOverArea * (eMaj_du * eBot.dy
- eMaj.dy * eBot_du);
- dudy = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
+ dudy = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
- eMaj_dv = vMax->texcoord[0][3] * wMax - vMin->texcoord[0][3] * wMin;
- eBot_dv = vMid->texcoord[0][3] * wMid - vMin->texcoord[0][3] * wMin;
- span.texStep[0][3] = oneOverArea * (eMaj_dv * eBot.dy
+ eMaj_dv = vMax->texcoord[0][3] * wMax - vMin->texcoord[0][3] * wMin;
+ eBot_dv = vMid->texcoord[0][3] * wMid - vMin->texcoord[0][3] * wMin;
+ span.texStep[0][3] = oneOverArea * (eMaj_dv * eBot.dy
- eMaj.dy * eBot_dv);
- dvdy = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
+ dvdy = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
}
# ifdef INTERP_LAMBDA
{
- eMaj.dy * eBot_ds);
dsdy[u] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
- eMaj_dt = vMax->texcoord[u][1] * wMax
- - vMin->texcoord[u][1] * wMin;
- eBot_dt = vMid->texcoord[u][1] * wMid
- - vMin->texcoord[u][1] * wMin;
- span.texStep[u][1] = oneOverArea * (eMaj_dt * eBot.dy
+ eMaj_dt = vMax->texcoord[u][1] * wMax
+ - vMin->texcoord[u][1] * wMin;
+ eBot_dt = vMid->texcoord[u][1] * wMid
+ - vMin->texcoord[u][1] * wMin;
+ span.texStep[u][1] = oneOverArea * (eMaj_dt * eBot.dy
- eMaj.dy * eBot_dt);
- dtdy[u] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
+ dtdy[u] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
- eMaj_du = vMax->texcoord[u][2] * wMax
+ eMaj_du = vMax->texcoord[u][2] * wMax
- vMin->texcoord[u][2] * wMin;
- eBot_du = vMid->texcoord[u][2] * wMid
+ eBot_du = vMid->texcoord[u][2] * wMid
- vMin->texcoord[u][2] * wMin;
- span.texStep[u][2] = oneOverArea * (eMaj_du * eBot.dy
+ span.texStep[u][2] = oneOverArea * (eMaj_du * eBot.dy
- eMaj.dy * eBot_du);
- dudy[u] = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
+ dudy[u] = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
- eMaj_dv = vMax->texcoord[u][3] * wMax
+ eMaj_dv = vMax->texcoord[u][3] * wMax
- vMin->texcoord[u][3] * wMin;
- eBot_dv = vMid->texcoord[u][3] * wMid
+ eBot_dv = vMid->texcoord[u][3] * wMid
- vMin->texcoord[u][3] * wMin;
- span.texStep[u][3] = oneOverArea * (eMaj_dv * eBot.dy
+ span.texStep[u][3] = oneOverArea * (eMaj_dv * eBot.dy
- eMaj.dy * eBot_dv);
- dvdy[u] = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
+ dvdy[u] = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
# ifdef INTERP_LAMBDA
{
GLfloat dudx = span.texStep[u][0] * span.texWidth[u];
+ dsdy * adjy) + FIXED_HALF;
fdsOuter = SignedFloatToFixed(dsdy + dxOuter * dsdx);
- t0 = vLower->texcoord[0][1] * T_SCALE;
- ft = (GLfixed)(t0 * FIXED_SCALE + dtdx * adjx
+ t0 = vLower->texcoord[0][1] * T_SCALE;
+ ft = (GLfixed)(t0 * FIXED_SCALE + dtdx * adjx
+ dtdy * adjy) + FIXED_HALF;
- fdtOuter = SignedFloatToFixed(dtdy + dxOuter * dtdx);
- }
+ fdtOuter = SignedFloatToFixed(dtdy + dxOuter * dtdx);
+ }
#endif
#ifdef INTERP_TEX
{
sLeft = s0 + (span.texStep[0][0] * adjx + dsdy * adjy)
* (1.0F/FIXED_SCALE);
dsOuter = dsdy + dxOuter * span.texStep[0][0];
- t0 = vLower->texcoord[0][1] * invW;
- tLeft = t0 + (span.texStep[0][1] * adjx + dtdy * adjy)
+ t0 = vLower->texcoord[0][1] * invW;
+ tLeft = t0 + (span.texStep[0][1] * adjx + dtdy * adjy)
* (1.0F/FIXED_SCALE);
- dtOuter = dtdy + dxOuter * span.texStep[0][1];
- u0 = vLower->texcoord[0][2] * invW;
- uLeft = u0 + (span.texStep[0][2] * adjx + dudy * adjy)
+ dtOuter = dtdy + dxOuter * span.texStep[0][1];
+ u0 = vLower->texcoord[0][2] * invW;
+ uLeft = u0 + (span.texStep[0][2] * adjx + dudy * adjy)
* (1.0F/FIXED_SCALE);
- duOuter = dudy + dxOuter * span.texStep[0][2];
- v0 = vLower->texcoord[0][3] * invW;
- vLeft = v0 + (span.texStep[0][3] * adjx + dvdy * adjy)
+ duOuter = dudy + dxOuter * span.texStep[0][2];
+ v0 = vLower->texcoord[0][3] * invW;
+ vLeft = v0 + (span.texStep[0][3] * adjx + dvdy * adjy)
* (1.0F/FIXED_SCALE);
- dvOuter = dvdy + dxOuter * span.texStep[0][3];
+ dvOuter = dvdy + dxOuter * span.texStep[0][3];
}
#endif
#ifdef INTERP_MULTITEX
sLeft[u] = s0 + (span.texStep[u][0] * adjx + dsdy[u]
* adjy) * (1.0F/FIXED_SCALE);
dsOuter[u] = dsdy[u] + dxOuter * span.texStep[u][0];
- t0 = vLower->texcoord[u][1] * invW;
- tLeft[u] = t0 + (span.texStep[u][1] * adjx + dtdy[u]
+ t0 = vLower->texcoord[u][1] * invW;
+ tLeft[u] = t0 + (span.texStep[u][1] * adjx + dtdy[u]
* adjy) * (1.0F/FIXED_SCALE);
- dtOuter[u] = dtdy[u] + dxOuter * span.texStep[u][1];
- u0 = vLower->texcoord[u][2] * invW;
- uLeft[u] = u0 + (span.texStep[u][2] * adjx + dudy[u]
+ dtOuter[u] = dtdy[u] + dxOuter * span.texStep[u][1];
+ u0 = vLower->texcoord[u][2] * invW;
+ uLeft[u] = u0 + (span.texStep[u][2] * adjx + dudy[u]
* adjy) * (1.0F/FIXED_SCALE);
- duOuter[u] = dudy[u] + dxOuter * span.texStep[u][2];
- v0 = vLower->texcoord[u][3] * invW;
+ duOuter[u] = dudy[u] + dxOuter * span.texStep[u][2];
+ v0 = vLower->texcoord[u][3] * invW;
vLeft[u] = v0 + (span.texStep[u][3] * adjx + dvdy[u]
* adjy) * (1.0F/FIXED_SCALE);
dvOuter[u] = dvdy[u] + dxOuter * span.texStep[u][3];
fdtInner = fdtOuter + span.intTexStep[1];
#endif
#ifdef INTERP_TEX
- dsInner = dsOuter + span.texStep[0][0];
- dtInner = dtOuter + span.texStep[0][1];
- duInner = duOuter + span.texStep[0][2];
- dvInner = dvOuter + span.texStep[0][3];
+ dsInner = dsOuter + span.texStep[0][0];
+ dtInner = dtOuter + span.texStep[0][1];
+ duInner = duOuter + span.texStep[0][2];
+ dvInner = dvOuter + span.texStep[0][3];
#endif
#ifdef INTERP_MULTITEX
{
ft += fdtOuter;
#endif
#ifdef INTERP_TEX
- sLeft += dsOuter;
- tLeft += dtOuter;
- uLeft += duOuter;
- vLeft += dvOuter;
+ sLeft += dsOuter;
+ tLeft += dtOuter;
+ uLeft += duOuter;
+ vLeft += dvOuter;
#endif
#ifdef INTERP_MULTITEX
{
ft += fdtInner;
#endif
#ifdef INTERP_TEX
- sLeft += dsInner;
- tLeft += dtInner;
- uLeft += duInner;
- vLeft += dvInner;
+ sLeft += dsInner;
+ tLeft += dtInner;
+ uLeft += duInner;
+ vLeft += dvInner;
#endif
#ifdef INTERP_MULTITEX
{
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