fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-05-06 15:58:05 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

nir: gather interpolation qualifiers

Browse source 
we'll want this to be able to link interpolation qualifiers in a simple way with
nir_opt_varyings. add the metadata for it and the FS gathering pass.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Marek Olšák <maraeo@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36501>
This commit is contained in:
Alyssa Rosenzweig 2025-07-31 14:48:34 -04:00 • committed by Marge Bot
parent b8f50b6317
commit 66740d9c91
3 changed files with 36 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
src/compiler/nir/nir_gather_info.c
View file

@ -573,6 +573,25 @@ gather_intrinsic_info(nir_intrinsic_instr *instr, nir_shader *shader,
else
shader->info.tess.tcs_cross_invocation_inputs_read |= slot_mask;
}
if (shader->info.stage == MESA_SHADER_FRAGMENT &&
instr->intrinsic == nir_intrinsic_load_interpolated_input) {
nir_intrinsic_instr *bary = nir_src_as_intrinsic(instr->src[0]);
if (bary && nir_intrinsic_has_interp_mode(bary)) {
enum glsl_interp_mode mode = nir_intrinsic_interp_mode(bary);
if (mode == INTERP_MODE_NOPERSPECTIVE)
shader->info.linear_varyings |= slot_mask;
else
shader->info.perspective_varyings |= slot_mask;
} else {
/* If the driver is lowering barycentrics, we can't recover the
* interpolation qualifiers. Bail.
*/
shader->info.known_interpolation_qualifiers = false;
}
}
break;
case nir_intrinsic_load_output:
@ -1035,6 +1054,9 @@ nir_shader_gather_info(nir_shader *shader, nir_function_impl *entrypoint)
shader->info.fs.uses_fbfetch_output = false;
shader->info.fs.needs_coarse_quad_helper_invocations = false;
shader->info.fs.needs_full_quad_helper_invocations = false;
/* By definition the fragment shader knows, unless we fail to gather. */
shader->info.known_interpolation_qualifiers = true;
}
if (shader->info.stage == MESA_SHADER_TESS_CTRL) {
shader->info.tess.tcs_same_invocation_inputs_read = 0;

3
src/compiler/nir/nir_print.c
View file

@ -2676,6 +2676,8 @@ print_shader_info(const struct shader_info *info, FILE *fp)
print_nz_x64(fp, "dual_slot_inputs", info->dual_slot_inputs);
print_nz_x64(fp, "outputs_written", info->outputs_written);
print_nz_x64(fp, "outputs_read", info->outputs_read);
print_nz_x64(fp, "perspective_varyings", info->perspective_varyings);
print_nz_x64(fp, "linear_varyings", info->linear_varyings);
print_nz_bitset(fp, "system_values_read", info->system_values_read, ARRAY_SIZE(info->system_values_read));
@ -2750,6 +2752,7 @@ print_shader_info(const struct shader_info *info, FILE *fp)
print_nz_bool(fp, "first_ubo_is_default_ubo", info->first_ubo_is_default_ubo);
print_nz_bool(fp, "separate_shader", info->separate_shader);
print_nz_bool(fp, "known_interpolation_qualifiers", info->known_interpolation_qualifiers);
print_nz_bool(fp, "has_transform_feedback_varyings", info->has_transform_feedback_varyings);
print_nz_bool(fp, "flrp_lowered", info->flrp_lowered);
print_nz_bool(fp, "io_lowered", info->io_lowered);

11
src/compiler/shader_info.h
View file

@ -87,6 +87,12 @@ typedef struct shader_info {
/* Which system values are actually read */
BITSET_DECLARE(system_values_read, SYSTEM_VALUE_MAX);
/* If known_interpolation_qualifiers is set, bitsets mapping locations to
* interpolation qualifiers perspective/linear/flat.
*/
uint64_t perspective_varyings;
uint64_t linear_varyings;
/* Which I/O is per-primitive, for read/written information combine with
* the fields above.
*/
@ -202,6 +208,11 @@ typedef struct shader_info {
/* Whether or not separate shader objects were used */
bool separate_shader:1;
/* Whether perspective_varyings/linear_varyings can be trusted. This depends
* on what this shader was linked with, as well as the API.
*/
bool known_interpolation_qualifiers:1;
/** Was this shader linked with any transform feedback varyings? */
bool has_transform_feedback_varyings:1;