From: Rob Clark <robcl...@freedesktop.org> Handled by tgsi_emulate for glsl->tgsi case.
Signed-off-by: Rob Clark <robcl...@freedesktop.org> Reviewed-by: Connor Abbott <cwabbo...@gmail.com> --- src/compiler/Makefile.sources | 1 + src/compiler/nir/nir.h | 2 + src/compiler/nir/nir_lower_passthrough_edgeflags.c | 82 ++++++++++++++++++++++ 3 files changed, 85 insertions(+) create mode 100644 src/compiler/nir/nir_lower_passthrough_edgeflags.c diff --git a/src/compiler/Makefile.sources b/src/compiler/Makefile.sources index b68b745..131eb5c 100644 --- a/src/compiler/Makefile.sources +++ b/src/compiler/Makefile.sources @@ -199,6 +199,7 @@ NIR_FILES = \ nir/nir_lower_indirect_derefs.c \ nir/nir_lower_io.c \ nir/nir_lower_outputs_to_temporaries.c \ + nir/nir_lower_passthrough_edgeflags.c \ nir/nir_lower_phis_to_scalar.c \ nir/nir_lower_returns.c \ nir/nir_lower_samplers.c \ diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h index e169d1a..e65e1e3 100644 --- a/src/compiler/nir/nir.h +++ b/src/compiler/nir/nir.h @@ -2278,6 +2278,8 @@ void nir_lower_two_sided_color(nir_shader *shader); void nir_lower_clamp_color_outputs(nir_shader *shader); +void nir_lower_passthrough_edgeflags(nir_shader *shader); + typedef struct nir_lower_wpos_ytransform_options { int state_tokens[5]; bool fs_coord_origin_upper_left :1; diff --git a/src/compiler/nir/nir_lower_passthrough_edgeflags.c b/src/compiler/nir/nir_lower_passthrough_edgeflags.c new file mode 100644 index 0000000..1afcbf7 --- /dev/null +++ b/src/compiler/nir/nir_lower_passthrough_edgeflags.c @@ -0,0 +1,82 @@ +/* + * Copyright © 2015 Red Hat + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "nir.h" +#include "nir_builder.h" + +typedef struct { + nir_shader *shader; + nir_builder b; +} lower_state; + +static nir_variable * +create_edgeflag_var(nir_shader *shader, bool output) +{ + nir_variable_mode mode = output ? nir_var_shader_out : nir_var_shader_in; + nir_variable *var = nir_variable_create(shader, mode, glsl_vec4_type(), + output ? "edgeflag_out" : "edgeflag_in"); + var->data.location = output ? VARYING_SLOT_EDGE : VERT_ATTRIB_EDGEFLAG; + return var; +} + +static bool +lower_block(nir_block *block, void *_state) +{ + lower_state *state = _state; + nir_builder *b = &state->b; + nir_variable *in, *out; + nir_ssa_def *def; + + in = create_edgeflag_var(state->shader, false); + out = create_edgeflag_var(state->shader, true); + + b->cursor = nir_before_block(block); + + def = nir_load_var(b, in); + nir_store_var(b, out, def, 0xf); + + /* only do this for first block: */ + return false; +} + +static void +lower_impl(lower_state *state, nir_function_impl *impl) +{ + nir_builder_init(&state->b, impl); + + nir_foreach_block(impl, lower_block, state); + nir_metadata_preserve(impl, nir_metadata_block_index | + nir_metadata_dominance); +} + +void nir_lower_passthrough_edgeflags(nir_shader *shader) +{ + lower_state state = { + .shader = shader, + }; + + nir_foreach_function(shader, function) { + if ((strcmp(function->name, "main") == 0) && function->impl) + lower_impl(&state, function->impl); + } +} -- 2.5.5 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev