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i965/vs: Split setup_uniform_clipplane_values() into Gen4-5/6-7 parts.

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Since Gen4-5 compacts clip planes and Gen6-7 doesn't, it makes sense to
split them into separate code paths.  This patch simply copies the code
to both halves; the next commits will simplify it.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Kenneth Graunke 2012-11-06 22:23:03 -08:00
parent bb284669f8
commit 0ad4360ca1
1 changed files with 39 additions and 21 deletions
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60
src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
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@ -526,29 +526,47 @@ vec4_visitor::setup_uniform_clipplane_values()
{
gl_clip_plane *clip_planes = brw_select_clip_planes(ctx);
/* Pre-Gen6, we compact clip planes. For example, if the user
* enables just clip planes 0, 1, and 3, we will enable clip planes
* 0, 1, and 2 in the hardware, and we'll move clip plane 3 to clip
* plane 2. This simplifies the implementation of the Gen6 clip
* thread.
*
* In Gen6 and later, we don't compact clip planes, because this
* simplifies the implementation of gl_ClipDistance.
*/
int compacted_clipplane_index = 0;
for (int i = 0; i < c->key.nr_userclip_plane_consts; ++i) {
if (intel->gen < 6 &&
!(c->key.userclip_planes_enabled_gen_4_5 & (1 << i))) {
continue;
if (intel->gen < 6) {
/* Pre-Gen6, we compact clip planes. For example, if the user
* enables just clip planes 0, 1, and 3, we will enable clip planes
* 0, 1, and 2 in the hardware, and we'll move clip plane 3 to clip
* plane 2. This simplifies the implementation of the Gen6 clip
* thread.
*/
int compacted_clipplane_index = 0;
for (int i = 0; i < c->key.nr_userclip_plane_consts; ++i) {
if (intel->gen < 6 &&
!(c->key.userclip_planes_enabled_gen_4_5 & (1 << i))) {
continue;
}
this->uniform_vector_size[this->uniforms] = 4;
this->userplane[compacted_clipplane_index] = dst_reg(UNIFORM, this->uniforms);
this->userplane[compacted_clipplane_index].type = BRW_REGISTER_TYPE_F;
for (int j = 0; j < 4; ++j) {
c->prog_data.param[this->uniforms * 4 + j] = &clip_planes[i][j];
}
++compacted_clipplane_index;
++this->uniforms;
}
this->uniform_vector_size[this->uniforms] = 4;
this->userplane[compacted_clipplane_index] = dst_reg(UNIFORM, this->uniforms);
this->userplane[compacted_clipplane_index].type = BRW_REGISTER_TYPE_F;
for (int j = 0; j < 4; ++j) {
c->prog_data.param[this->uniforms * 4 + j] = &clip_planes[i][j];
} else {
/* In Gen6 and later, we don't compact clip planes, because this
* simplifies the implementation of gl_ClipDistance.
*/
int compacted_clipplane_index = 0;
for (int i = 0; i < c->key.nr_userclip_plane_consts; ++i) {
if (intel->gen < 6 &&
!(c->key.userclip_planes_enabled_gen_4_5 & (1 << i))) {
continue;
}
this->uniform_vector_size[this->uniforms] = 4;
this->userplane[compacted_clipplane_index] = dst_reg(UNIFORM, this->uniforms);
this->userplane[compacted_clipplane_index].type = BRW_REGISTER_TYPE_F;
for (int j = 0; j < 4; ++j) {
c->prog_data.param[this->uniforms * 4 + j] = &clip_planes[i][j];
}
++compacted_clipplane_index;
++this->uniforms;
}
++compacted_clipplane_index;
++this->uniforms;
}
}