diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.cpp | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index 4f9a89e83e6..3aaf843bc97 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -39,6 +39,7 @@ #include "brw_program.h" #include "brw_dead_control_flow.h" #include "compiler/glsl_types.h" +#include "compiler/nir/nir_builder.h" #include "program/prog_parameter.h" using namespace brw; @@ -6445,6 +6446,47 @@ brw_nir_set_default_interpolation(const struct brw_device_info *devinfo, } } +/** + * Demote per-sample barycentric intrinsics to centroid. + * + * Useful when rendering to a non-multisampled buffer. + */ +static void +demote_sample_qualifiers(nir_shader *nir) +{ + nir_foreach_function(f, nir) { + if (!f->impl) + continue; + + nir_builder b; + nir_builder_init(&b, f->impl); + + nir_foreach_block(block, f->impl) { + nir_foreach_instr_safe(instr, block) { + if (instr->type != nir_instr_type_intrinsic) + continue; + + nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr); + if (intrin->intrinsic != nir_intrinsic_load_barycentric_sample && + intrin->intrinsic != nir_intrinsic_load_barycentric_at_sample) + continue; + + b.cursor = nir_before_instr(instr); + nir_ssa_def *centroid = + nir_load_barycentric(&b, nir_intrinsic_load_barycentric_centroid, + nir_intrinsic_interp_mode(intrin)); + nir_ssa_def_rewrite_uses(&intrin->dest.ssa, + nir_src_for_ssa(centroid)); + nir_instr_remove(instr); + } + } + + nir_metadata_preserve(f->impl, (nir_metadata) + ((unsigned) nir_metadata_block_index | + (unsigned) nir_metadata_dominance)); + } +} + const unsigned * brw_compile_fs(const struct brw_compiler *compiler, void *log_data, void *mem_ctx, @@ -6465,6 +6507,8 @@ brw_compile_fs(const struct brw_compiler *compiler, void *log_data, key->flat_shade, key->persample_interp); brw_nir_lower_fs_inputs(shader); brw_nir_lower_fs_outputs(shader); + if (!key->multisample_fbo) + NIR_PASS_V(shader, demote_sample_qualifiers); shader = brw_postprocess_nir(shader, compiler->devinfo, true); /* key->alpha_test_func means simulating alpha testing via discards, |