- GLfloat wMax = vMax->win[3];
- GLfloat wMin = vMin->win[3];
- GLfloat wMid = vMid->win[3];
- GLfloat eMaj_ds, eBot_ds;
- GLfloat eMaj_dt, eBot_dt;
- GLfloat eMaj_du, eBot_du;
- GLfloat eMaj_dv, eBot_dv;
-
- eMaj_ds = vMax->texcoord[0][0] * wMax - vMin->texcoord[0][0] * wMin;
- eBot_ds = vMid->texcoord[0][0] * wMid - vMin->texcoord[0][0] * wMin;
- span.texStep[0][0] = oneOverArea * (eMaj_ds * eBot.dy
- - 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.dy * eBot_dt);
- 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.dy * eBot_du);
- 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.dy * eBot_dv);
- dvdy = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
- }
-# ifdef INTERP_LAMBDA
- {
- GLfloat dudx = span.texStep[0][0] * span.texWidth[0];
- GLfloat dudy = dsdy * span.texWidth[0];
- GLfloat dvdx = span.texStep[0][1] * span.texHeight[0];
- GLfloat dvdy = dtdy * span.texHeight[0];
- GLfloat r1 = dudx * dudx + dudy * dudy;
- GLfloat r2 = dvdx * dvdx + dvdy * dvdy;
- span.rho[0] = r1 + r2; /* was rho2 = MAX2(r1,r2) */
- span.activeMask |= SPAN_LAMBDA;
- }
-# endif
-#endif
-#ifdef INTERP_MULTITEX
- span.activeMask |= SPAN_TEXTURE;
-# ifdef INTERP_LAMBDA
- span.activeMask |= SPAN_LAMBDA;
-# endif
- {
- GLfloat wMax = vMax->win[3];
- GLfloat wMin = vMin->win[3];
- GLfloat wMid = vMid->win[3];
- GLuint u;
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- GLfloat eMaj_ds, eBot_ds;
- GLfloat eMaj_dt, eBot_dt;
- GLfloat eMaj_du, eBot_du;
- GLfloat eMaj_dv, eBot_dv;
- eMaj_ds = vMax->texcoord[u][0] * wMax
- - vMin->texcoord[u][0] * wMin;
- eBot_ds = vMid->texcoord[u][0] * wMid
- - vMin->texcoord[u][0] * wMin;
- span.texStep[u][0] = oneOverArea * (eMaj_ds * eBot.dy
- - 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.dy * eBot_dt);
- dtdy[u] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
-
- eMaj_du = vMax->texcoord[u][2] * wMax
- - vMin->texcoord[u][2] * wMin;
- eBot_du = vMid->texcoord[u][2] * wMid
- - vMin->texcoord[u][2] * wMin;
- span.texStep[u][2] = oneOverArea * (eMaj_du * eBot.dy
- - eMaj.dy * eBot_du);
- dudy[u] = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
-
- eMaj_dv = vMax->texcoord[u][3] * wMax
- - vMin->texcoord[u][3] * wMin;
- eBot_dv = vMid->texcoord[u][3] * wMid
- - vMin->texcoord[u][3] * wMin;
- span.texStep[u][3] = oneOverArea * (eMaj_dv * eBot.dy
- - eMaj.dy * eBot_dv);
- dvdy[u] = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
-# ifdef INTERP_LAMBDA
- {
- GLfloat dudx = span.texStep[u][0] * span.texWidth[u];
- GLfloat dudy = dsdy[u] * span.texWidth[u];
- GLfloat dvdx = span.texStep[u][1] * span.texHeight[u];
- GLfloat dvdy = dtdy[u] * span.texHeight[u];
- GLfloat r1 = dudx * dudx + dudy * dudy;
- GLfloat r2 = dvdx * dvdx + dvdy * dvdy;
- span.rho[u] = r1 + r2; /* was rho2 = MAX2(r1,r2) */
- }
-# endif
- }
- }
+ /* win[3] is 1/W */
+ const GLfloat wMax = vMax->win[3], wMin = vMin->win[3], wMid = vMid->win[3];
+ TEX_UNIT_LOOP(
+ GLfloat eMaj_ds = vMax->texcoord[u][0] * wMax - vMin->texcoord[u][0] * wMin;
+ GLfloat eBot_ds = vMid->texcoord[u][0] * wMid - vMin->texcoord[u][0] * wMin;
+ GLfloat eMaj_dt = vMax->texcoord[u][1] * wMax - vMin->texcoord[u][1] * wMin;
+ GLfloat eBot_dt = vMid->texcoord[u][1] * wMid - vMin->texcoord[u][1] * wMin;
+ GLfloat eMaj_du = vMax->texcoord[u][2] * wMax - vMin->texcoord[u][2] * wMin;
+ GLfloat eBot_du = vMid->texcoord[u][2] * wMid - vMin->texcoord[u][2] * wMin;
+ GLfloat eMaj_dv = vMax->texcoord[u][3] * wMax - vMin->texcoord[u][3] * wMin;
+ GLfloat eBot_dv = vMid->texcoord[u][3] * wMid - vMin->texcoord[u][3] * wMin;
+ span.texStepX[u][0] = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
+ span.texStepY[u][0] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
+ span.texStepX[u][1] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
+ span.texStepY[u][1] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
+ span.texStepX[u][2] = oneOverArea * (eMaj_du * eBot.dy - eMaj.dy * eBot_du);
+ span.texStepY[u][2] = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
+ span.texStepX[u][3] = oneOverArea * (eMaj_dv * eBot.dy - eMaj.dy * eBot_dv);
+ span.texStepY[u][3] = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
+ )