return *clipvertex || *position;
}
+static nir_ssa_def *
+get_ucp(nir_builder *b, int plane,
+ const gl_state_index16 clipplane_state_tokens[][STATE_LENGTH])
+{
+ if (clipplane_state_tokens) {
+ char tmp[100];
+ snprintf(tmp, ARRAY_SIZE(tmp), "gl_ClipPlane%dMESA", plane);
+ nir_variable *var = nir_variable_create(b->shader,
+ nir_var_uniform,
+ glsl_vec4_type(),
+ tmp);
+
+ var->num_state_slots = 1;
+ var->state_slots = ralloc_array(var, nir_state_slot, 1);
+ memcpy(var->state_slots[0].tokens,
+ clipplane_state_tokens[plane],
+ sizeof(var->state_slots[0].tokens));
+ return nir_load_var(b, var);
+ } else
+ return nir_load_user_clip_plane(b, plane);
+}
+
+
static void
lower_clip_outputs(nir_builder *b, nir_variable *position,
nir_variable *clipvertex, nir_variable **out,
unsigned ucp_enables, bool use_vars,
- bool use_clipdist_array)
+ bool use_clipdist_array,
+ const gl_state_index16 clipplane_state_tokens[][STATE_LENGTH])
{
nir_ssa_def *clipdist[MAX_CLIP_PLANES];
nir_ssa_def *cv;
exec_node_remove(&clipvertex->node);
clipvertex->data.mode = nir_var_shader_temp;
exec_list_push_tail(&b->shader->globals, &clipvertex->node);
+ nir_fixup_deref_modes(b->shader);
}
} else {
if (clipvertex)
for (int plane = 0; plane < MAX_CLIP_PLANES; plane++) {
if (ucp_enables & (1 << plane)) {
- nir_ssa_def *ucp = nir_load_user_clip_plane(b, plane);
+ nir_ssa_def *ucp = get_ucp(b, plane, clipplane_state_tokens);
/* calculate clipdist[plane] - dot(ucp, cv): */
clipdist[plane] = nir_fdot4(b, ucp, cv);
*/
bool
nir_lower_clip_vs(nir_shader *shader, unsigned ucp_enables, bool use_vars,
- bool use_clipdist_array)
+ bool use_clipdist_array,
+ const gl_state_index16 clipplane_state_tokens[][STATE_LENGTH])
{
nir_function_impl *impl = nir_shader_get_entrypoint(shader);
nir_builder b;
if (!ucp_enables)
return false;
+ /* find clipvertex/position outputs: */
+ nir_foreach_variable(var, &shader->outputs) {
+ int loc = var->data.driver_location;
+
+ /* keep track of last used driver-location.. we'll be
+ * appending CLIP_DIST0/CLIP_DIST1 after last existing
+ * output:
+ */
+ maxloc = MAX2(maxloc, loc);
+ }
+
nir_builder_init(&b, impl);
/* NIR should ensure that, even in case of loops/if-else, there
use_clipdist_array);
lower_clip_outputs(&b, position, clipvertex, out, ucp_enables, use_vars,
- use_clipdist_array);
+ use_clipdist_array, clipplane_state_tokens);
nir_metadata_preserve(impl, nir_metadata_dominance);
static void
lower_clip_in_gs_block(nir_builder *b, nir_block *block, nir_variable *position,
nir_variable *clipvertex, nir_variable **out,
- unsigned ucp_enables, bool use_clipdist_array)
+ unsigned ucp_enables, bool use_clipdist_array,
+ const gl_state_index16 clipplane_state_tokens[][STATE_LENGTH])
{
nir_foreach_instr_safe(instr, block) {
if (instr->type != nir_instr_type_intrinsic)
case nir_intrinsic_emit_vertex:
b->cursor = nir_before_instr(instr);
lower_clip_outputs(b, position, clipvertex, out, ucp_enables, true,
- use_clipdist_array);
+ use_clipdist_array, clipplane_state_tokens);
break;
default:
/* not interesting; skip this */
bool
nir_lower_clip_gs(nir_shader *shader, unsigned ucp_enables,
- bool use_clipdist_array)
+ bool use_clipdist_array,
+ const gl_state_index16 clipplane_state_tokens[][STATE_LENGTH])
{
nir_function_impl *impl = nir_shader_get_entrypoint(shader);
nir_builder b;
nir_foreach_block(block, impl)
lower_clip_in_gs_block(&b, block, position, clipvertex, out,
- ucp_enables, use_clipdist_array);
+ ucp_enables, use_clipdist_array,
+ clipplane_state_tokens);
nir_metadata_preserve(impl, nir_metadata_dominance);