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i965/gen6: Refactor SF setup a bit to handle overrides in one place.

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Acked-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Eric Anholt 2011-06-05 11:45:04 -07:00
parent da8b4c0798
commit e7280b16d6
1 changed files with 24 additions and 19 deletions
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43
src/mesa/drivers/dri/i965/gen6_sf_state.c
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@ -100,10 +100,11 @@ upload_sf_state(struct brw_context *brw)
int i;
/* _NEW_BUFFER */
GLboolean render_to_fbo = brw->intel.ctx.DrawBuffer->Name != 0;
int attr = 0;
int attr = 0, input_index = 0;
int urb_start;
int two_side_color = (ctx->Light.Enabled && ctx->Light.Model.TwoSide);
float point_size;
uint16_t attr_overrides[FRAG_ATTRIB_MAX];
/* _NEW_TRANSFORM */
if (ctx->Transform.ClipPlanesEnabled)
@ -243,6 +244,27 @@ upload_sf_state(struct brw_context *brw)
((brw->fragment_program->Base.InputsRead & FRAG_BIT_WPOS) ? 0 : 1));
}
/* Create the mapping from the FS inputs we produce to the VS outputs
* they source from.
*/
for (; attr < FRAG_ATTRIB_MAX; attr++) {
if (!(brw->fragment_program->Base.InputsRead & BITFIELD64_BIT(attr)))
continue;
/* The hardware can only do the overrides on 16 overrides at a
* time, and the other up to 16 have to be lined up so that the
* input index = the output index. We'll need to do some
* tweaking to make sure that's the case.
*/
assert(input_index < 16 || attr == input_index);
attr_overrides[input_index++] = get_attr_override(brw, attr,
two_side_color);
}
for (; input_index < FRAG_ATTRIB_MAX; input_index++)
attr_overrides[input_index] = 0;
BEGIN_BATCH(20);
OUT_BATCH(_3DSTATE_SF << 16 | (20 - 2));
OUT_BATCH(dw1);
@ -253,24 +275,7 @@ upload_sf_state(struct brw_context *brw)
OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
OUT_BATCH_F(0.0); /* XXX: global depth offset clamp */
for (i = 0; i < 8; i++) {
uint32_t attr_overrides = 0;
for (; attr < 64; attr++) {
if (brw->fragment_program->Base.InputsRead & BITFIELD64_BIT(attr)) {
attr_overrides |= get_attr_override(brw, attr, two_side_color);
attr++;
break;
}
}
for (; attr < 64; attr++) {
if (brw->fragment_program->Base.InputsRead & BITFIELD64_BIT(attr)) {
attr_overrides |= get_attr_override(brw, attr, two_side_color) << 16;
attr++;
break;
}
}
OUT_BATCH(attr_overrides);
OUT_BATCH(attr_overrides[i * 2] | attr_overrides[i * 2 + 1] << 16);
}
OUT_BATCH(dw16); /* point sprite texcoord bitmask */
OUT_BATCH(dw17); /* constant interp bitmask */