- GLfloat ds, dt, dr, dq;
- span.attrStart[FRAG_ATTRIB_TEX0][0] = invw0 * vert0->attrib[FRAG_ATTRIB_TEX0][0];
- span.attrStart[FRAG_ATTRIB_TEX0][1] = invw0 * vert0->attrib[FRAG_ATTRIB_TEX0][1];
- span.attrStart[FRAG_ATTRIB_TEX0][2] = invw0 * vert0->attrib[FRAG_ATTRIB_TEX0][2];
- span.attrStart[FRAG_ATTRIB_TEX0][3] = invw0 * vert0->attrib[FRAG_ATTRIB_TEX0][3];
- ds = (invw1 * vert1->attrib[FRAG_ATTRIB_TEX0][0]) - span.attrStart[FRAG_ATTRIB_TEX0][0];
- dt = (invw1 * vert1->attrib[FRAG_ATTRIB_TEX0][1]) - span.attrStart[FRAG_ATTRIB_TEX0][1];
- dr = (invw1 * vert1->attrib[FRAG_ATTRIB_TEX0][2]) - span.attrStart[FRAG_ATTRIB_TEX0][2];
- dq = (invw1 * vert1->attrib[FRAG_ATTRIB_TEX0][3]) - span.attrStart[FRAG_ATTRIB_TEX0][3];
- span.attrStepX[FRAG_ATTRIB_TEX0][0] = ds * invLen;
- span.attrStepX[FRAG_ATTRIB_TEX0][1] = dt * invLen;
- span.attrStepX[FRAG_ATTRIB_TEX0][2] = dr * invLen;
- span.attrStepX[FRAG_ATTRIB_TEX0][3] = dq * invLen;
- span.attrStepY[FRAG_ATTRIB_TEX0][0] = 0.0F;
- span.attrStepY[FRAG_ATTRIB_TEX0][1] = 0.0F;
- span.attrStepY[FRAG_ATTRIB_TEX0][2] = 0.0F;
- span.attrStepY[FRAG_ATTRIB_TEX0][3] = 0.0F;
- }
-#endif
-#if defined(INTERP_MULTITEX) || defined(INTERP_VARYING)
- interpFlags |= (SPAN_TEXTURE | SPAN_VARYING);
- {
- const GLfloat invLen = 1.0F / numPixels;
- const GLfloat invw0 = vert0->win[3];
- const GLfloat invw1 = vert1->win[3];
+ const GLfloat invw0 = vert0->attrib[VARYING_SLOT_POS][3];
+ const GLfloat invw1 = vert1->attrib[VARYING_SLOT_POS][3];
+
+ span.attrStart[VARYING_SLOT_POS][3] = invw0;
+ span.attrStepX[VARYING_SLOT_POS][3] = (invw1 - invw0) * invLen;
+ span.attrStepY[VARYING_SLOT_POS][3] = 0.0;
+