Lines Matching refs:dtdx
415 _swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy,
420 GLfloat dvdx = texH * ((t + dtdx) / (q + dqdx) - t * invQ);
437 _swrast_compute_lambda(GLfloat dsdx, GLfloat dsdy, GLfloat dtdx, GLfloat dtdy,
442 GLfloat dtdx2 = (t + dtdx) / (q + dqdx) - t * invQ;
488 const GLfloat dtdx = span->attrStepX[attr][1];
494 GLfloat t = span->attrStart[attr][1] + span->leftClip * dtdx;
536 lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy,
540 t += dtdx;
553 lambda[i] = _swrast_compute_lambda(dsdx, dsdy, dtdx, dtdy,
557 t += dtdx;
579 t += dtdx;
595 t += dtdx;
608 t += dtdx;
