Mesa (master): i965/vs: add support for emitting gl_ClipVertex
Chris Forbes
chrisf at kemper.freedesktop.org
Fri Jun 7 09:03:26 UTC 2013
Module: Mesa
Branch: master
Commit: 06a503ca7163174e9763adcf64186d38997fee83
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=06a503ca7163174e9763adcf64186d38997fee83
Author: Chris Forbes <chrisf at ijw.co.nz>
Date: Mon May 20 22:10:29 2013 +1200
i965/vs: add support for emitting gl_ClipVertex
Removes the special-case suppression of gl_ClipVertex in the VUE map.
Also calculate vertex outcodes for user clip planes based on
gl_ClipVertex if written; otherwise gl_Position.
Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
Reviewed-by: Paul Berry <stereotype441 at gmail.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
---
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp | 4 +++-
src/mesa/drivers/dri/i965/brw_vs.c | 6 ------
2 files changed, 3 insertions(+), 7 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index b2f8f00..33c1b24 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
@@ -2567,8 +2567,10 @@ vec4_visitor::emit_psiz_and_flags(struct brw_reg reg)
current_annotation = "Clipping flags";
for (i = 0; i < key->nr_userclip_plane_consts; i++) {
vec4_instruction *inst;
+ gl_varying_slot slot = (prog_data->vue_map.slots_valid & VARYING_BIT_CLIP_VERTEX)
+ ? VARYING_SLOT_CLIP_VERTEX : VARYING_SLOT_POS;
- inst = emit(DP4(dst_null_f(), src_reg(output_reg[VARYING_SLOT_POS]),
+ inst = emit(DP4(dst_null_f(), src_reg(output_reg[slot]),
src_reg(this->userplane[i])));
inst->conditional_mod = BRW_CONDITIONAL_L;
diff --git a/src/mesa/drivers/dri/i965/brw_vs.c b/src/mesa/drivers/dri/i965/brw_vs.c
index 6eb916e..720325d 100644
--- a/src/mesa/drivers/dri/i965/brw_vs.c
+++ b/src/mesa/drivers/dri/i965/brw_vs.c
@@ -63,12 +63,6 @@ brw_compute_vue_map(struct brw_context *brw, struct brw_vue_map *vue_map,
{
const struct intel_context *intel = &brw->intel;
- /* Prior to Gen6, don't assign a slot for VARYING_SLOT_CLIP_VERTEX, since
- * it is unsupported.
- */
- if (intel->gen < 6)
- slots_valid &= ~VARYING_BIT_CLIP_VERTEX;
-
vue_map->slots_valid = slots_valid;
int i;
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