diff options
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/swrast/s_linetemp.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/mesa/swrast/s_linetemp.h b/src/mesa/swrast/s_linetemp.h index f5b2d95653f..61c338ac69a 100644 --- a/src/mesa/swrast/s_linetemp.h +++ b/src/mesa/swrast/s_linetemp.h @@ -37,6 +37,7 @@ * INTERP_INDEX - if defined, interpolate color index values * INTERP_TEX - if defined, interpolate unit 0 texcoords * INTERP_MULTITEX - if defined, interpolate multi-texcoords + * INTERP_VARYING - if defined, interpolate GLSL varyings * * When one can directly address pixels in the color buffer the following * macros can be defined and used to directly compute pixel addresses during @@ -333,6 +334,34 @@ NAME( GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1 ) } } #endif +#ifdef INTERP_VARYING + interpFlags |= SPAN_VARYING; + { /* XXX review this */ + const GLfloat invLen = 1.0F / numPixels; + GLuint v; + for (v = 0; v < MAX_VARYING; v++) { + const GLfloat invw0 = vert0->win[3]; + const GLfloat invw1 = vert1->win[3]; + GLfloat ds, dt, dr, dq; + span.var[v][0] = invw0 * vert0->varying[v][0]; + span.var[v][1] = invw0 * vert0->varying[v][1]; + span.var[v][2] = invw0 * vert0->varying[v][2]; + span.var[v][3] = invw0 * vert0->varying[v][3]; + ds = (invw1 * vert1->varying[v][0]) - span.var[v][0]; + dt = (invw1 * vert1->varying[v][1]) - span.var[v][1]; + dr = (invw1 * vert1->varying[v][2]) - span.var[v][2]; + dq = (invw1 * vert1->varying[v][3]) - span.var[v][3]; + span.varStepX[v][0] = ds * invLen; + span.varStepX[v][1] = dt * invLen; + span.varStepX[v][2] = dr * invLen; + span.varStepX[v][3] = dq * invLen; + span.varStepY[v][0] = 0.0F; + span.varStepY[v][1] = 0.0F; + span.varStepY[v][2] = 0.0F; + span.varStepY[v][3] = 0.0F; + } + } +#endif INIT_SPAN(span, GL_LINE, numPixels, interpFlags, SPAN_XY); |