diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/gen6_sf_state.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/src/mesa/drivers/dri/i965/gen6_sf_state.c b/src/mesa/drivers/dri/i965/gen6_sf_state.c index c1bc252cb0..bd7d4610d4 100644 --- a/src/mesa/drivers/dri/i965/gen6_sf_state.c +++ b/src/mesa/drivers/dri/i965/gen6_sf_state.c @@ -56,7 +56,6 @@ uint32_t get_attr_override(struct brw_vue_map *vue_map, int urb_entry_read_offset, int fs_attr, bool two_side_color) { - int attr_override, slot; int vs_attr = _mesa_frag_attrib_to_vert_result(fs_attr); if (vs_attr < 0 || vs_attr == VERT_RESULT_HPOS) { /* These attributes will be overwritten by the fragment shader's @@ -67,7 +66,7 @@ get_attr_override(struct brw_vue_map *vue_map, int urb_entry_read_offset, } /* Find the VUE slot for this attribute. */ - slot = vue_map->vert_result_to_slot[vs_attr]; + int slot = vue_map->vert_result_to_slot[vs_attr]; /* If there was only a back color written but not front, use back * as the color instead of undefined @@ -89,23 +88,25 @@ get_attr_override(struct brw_vue_map *vue_map, int urb_entry_read_offset, * Each increment of urb_entry_read_offset represents a 256-bit value, so * it counts for two 128-bit VUE slots. */ - attr_override = slot - 2 * urb_entry_read_offset; - assert (attr_override >= 0 && attr_override < 32); + int source_attr = slot - 2 * urb_entry_read_offset; + assert(source_attr >= 0 && source_attr < 32); /* If we are doing two-sided color, and the VUE slot following this one * represents a back-facing color, then we need to instruct the SF unit to * do back-facing swizzling. */ - if (two_side_color) { - if (vue_map->slot_to_vert_result[slot] == VERT_RESULT_COL0 && - vue_map->slot_to_vert_result[slot+1] == VERT_RESULT_BFC0) - attr_override |= (ATTRIBUTE_SWIZZLE_INPUTATTR_FACING << ATTRIBUTE_SWIZZLE_SHIFT); - else if (vue_map->slot_to_vert_result[slot] == VERT_RESULT_COL1 && - vue_map->slot_to_vert_result[slot+1] == VERT_RESULT_BFC1) - attr_override |= (ATTRIBUTE_SWIZZLE_INPUTATTR_FACING << ATTRIBUTE_SWIZZLE_SHIFT); + bool swizzling = two_side_color && + ((vue_map->slot_to_vert_result[slot] == VERT_RESULT_COL0 && + vue_map->slot_to_vert_result[slot+1] == VERT_RESULT_BFC0) || + (vue_map->slot_to_vert_result[slot] == VERT_RESULT_COL1 && + vue_map->slot_to_vert_result[slot+1] == VERT_RESULT_BFC1)); + + if (swizzling) { + return source_attr | + (ATTRIBUTE_SWIZZLE_INPUTATTR_FACING << ATTRIBUTE_SWIZZLE_SHIFT); } - return attr_override; + return source_attr; } static void |