diff options
| -rw-r--r-- | src/compiler/Makefile.sources | 1 | ||||
| -rw-r--r-- | src/compiler/nir/nir.h | 2 | ||||
| -rw-r--r-- | src/compiler/nir/nir_lower_clamp_color_outputs.c | 117 |
3 files changed, 120 insertions, 0 deletions
diff --git a/src/compiler/Makefile.sources b/src/compiler/Makefile.sources index 8915943af00..3426bcfc451 100644 --- a/src/compiler/Makefile.sources +++ b/src/compiler/Makefile.sources @@ -186,6 +186,7 @@ NIR_FILES = \ nir/nir_liveness.c \ nir/nir_lower_alu_to_scalar.c \ nir/nir_lower_atomics.c \ + nir/nir_lower_clamp_color_outputs.c \ nir/nir_lower_clip.c \ nir/nir_lower_double_ops.c \ nir/nir_lower_double_packing.c \ diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h index f5f41446d6f..32eb3b2ca07 100644 --- a/src/compiler/nir/nir.h +++ b/src/compiler/nir/nir.h @@ -2409,6 +2409,8 @@ void nir_lower_clip_fs(nir_shader *shader, unsigned ucp_enables); void nir_lower_two_sided_color(nir_shader *shader); +void nir_lower_clamp_color_outputs(nir_shader *shader); + void nir_lower_atomics(nir_shader *shader, const struct gl_shader_program *shader_program); void nir_lower_to_source_mods(nir_shader *shader); diff --git a/src/compiler/nir/nir_lower_clamp_color_outputs.c b/src/compiler/nir/nir_lower_clamp_color_outputs.c new file mode 100644 index 00000000000..37c4ff00a3d --- /dev/null +++ b/src/compiler/nir/nir_lower_clamp_color_outputs.c @@ -0,0 +1,117 @@ +/* + * 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 bool +is_color_output(lower_state *state, nir_variable *out) +{ + switch (state->shader->stage) { + case MESA_SHADER_VERTEX: + case MESA_SHADER_GEOMETRY: + switch (out->data.location) { + case VARYING_SLOT_COL0: + case VARYING_SLOT_COL1: + case VARYING_SLOT_BFC0: + case VARYING_SLOT_BFC1: + return true; + default: + return false; + } + break; + case MESA_SHADER_FRAGMENT: + switch (out->data.location) { + case FRAG_RESULT_COLOR: + return true; + default: + return false; + } + break; + default: + return false; + } +} + +static void +lower_intrinsic(lower_state *state, nir_intrinsic_instr *intr) +{ + nir_variable *out; + nir_builder *b = &state->b; + nir_ssa_def *s; + + if (intr->intrinsic != nir_intrinsic_store_var) + return; + + out = intr->variables[0]->var; + + if (out->data.mode != nir_var_shader_out) + return; + + if (is_color_output(state, out)) { + b->cursor = nir_before_instr(&intr->instr); + s = nir_ssa_for_src(b, intr->src[0], intr->num_components); + s = nir_fsat(b, s); + nir_instr_rewrite_src(&intr->instr, &intr->src[0], nir_src_for_ssa(s)); + } +} + +static bool +lower_block(lower_state *state, nir_block *block) +{ + nir_foreach_instr_safe(instr, block) { + if (instr->type == nir_instr_type_intrinsic) + lower_intrinsic(state, nir_instr_as_intrinsic(instr)); + } + + return true; +} +static void +lower_impl(lower_state *state, nir_function_impl *impl) +{ + nir_builder_init(&state->b, impl); + + nir_foreach_block(block, impl) { + lower_block(state, block); + } + nir_metadata_preserve(impl, nir_metadata_block_index | + nir_metadata_dominance); +} + +void nir_lower_clamp_color_outputs(nir_shader *shader) +{ + lower_state state = { + .shader = shader, + }; + + nir_foreach_function(function, shader) { + if (function->impl) + lower_impl(&state, function->impl); + } +} |