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i965: Emit writes to viewport index

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This variable is handled in a fashion identical to gl_Layer.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Ian Romanick 2013-11-05 12:19:23 -08:00
parent 37f65b0751
commit fceb8b55c0
2 changed files with 7 additions and 3 deletions
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4
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
View file

@ -2772,6 +2772,10 @@ vec4_visitor::emit_psiz_and_flags(struct brw_reg reg)
emit(MOV(retype(brw_writemask(reg, WRITEMASK_Y), BRW_REGISTER_TYPE_D),
src_reg(output_reg[VARYING_SLOT_LAYER])));
}
if (prog_data->vue_map.slots_valid & VARYING_BIT_VIEWPORT) {
emit(MOV(retype(brw_writemask(reg, WRITEMASK_Z), BRW_REGISTER_TYPE_D),
src_reg(output_reg[VARYING_SLOT_VIEWPORT])));
}
}
}

6
src/mesa/drivers/dri/i965/brw_vs.c
View file

@ -60,10 +60,10 @@ brw_compute_vue_map(struct brw_context *brw, struct brw_vue_map *vue_map,
vue_map->slots_valid = slots_valid;
int i;
/* gl_Layer doesn't get its own varying slot--it's stored in the virst VUE
* slot (VARYING_SLOT_PSIZ).
/* gl_Layer and gl_ViewportIndex don't get their own varying slots -- they
* are stored in the virst VUE slot (VARYING_SLOT_PSIZ).
*/
slots_valid &= ~VARYING_BIT_LAYER;
slots_valid &= ~(VARYING_BIT_LAYER | VARYING_BIT_VIEWPORT);
/* Make sure that the values we store in vue_map->varying_to_slot and
* vue_map->slot_to_varying won't overflow the signed chars that are used