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mesa/st: add sampler uniforms

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Add sampler uniforms for the UV plane(s), so driver can count the
uniforms and get the correct sampler count.

Fixes lowered YUV on a6xx which actually wants to know # of samplers.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Rob Clark 2019-07-15 09:05:55 -07:00 • committed by Rob Clark
parent a9f34b5631
commit 856e84083e
1 changed files with 45 additions and 6 deletions
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47
src/mesa/state_tracker/st_nir_lower_tex_src_plane.c
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@ -33,7 +33,7 @@
#include "st_nir.h"
typedef struct {
struct shader_info *info;
struct nir_shader *shader;
unsigned lower_2plane;
unsigned lower_3plane;
@ -44,6 +44,34 @@ typedef struct {
unsigned char sampler_map[PIPE_MAX_SAMPLERS][2];
} lower_tex_src_state;
static nir_variable *
find_sampler(lower_tex_src_state *state, unsigned samp)
{
/* NOTE: arrays of samplerExternalOES do not appear to be allowed: */
nir_foreach_variable(var, &state->shader->uniforms)
if (var->data.binding == samp)
return var;
return NULL;
}
static void
add_sampler(lower_tex_src_state *state, unsigned orig_binding,
unsigned new_binding, const char *ext)
{
const struct glsl_type *samplerExternalOES =
glsl_sampler_type(GLSL_SAMPLER_DIM_EXTERNAL, false, false, GLSL_TYPE_FLOAT);
nir_variable *new_sampler, *orig_sampler =
find_sampler(state, orig_binding);
char *name;
asprintf(&name, "%s:%s", orig_sampler->name, ext);
new_sampler = nir_variable_create(state->shader, nir_var_uniform,
samplerExternalOES, name);
free(name);
new_sampler->data.binding = new_binding;
}
static void
assign_extra_samplers(lower_tex_src_state *state, unsigned free_slots)
{
@ -52,12 +80,23 @@ assign_extra_samplers(lower_tex_src_state *state, unsigned free_slots)
while (mask) {
unsigned extra, y_samp = u_bit_scan(&mask);
if (state->lower_3plane & (1 << y_samp)) {
/* two additional planes (U and V): */
extra = u_bit_scan(&free_slots);
state->sampler_map[y_samp][0] = extra;
if (state->lower_3plane & (1 << y_samp)) {
add_sampler(state, y_samp, extra, "u");
extra = u_bit_scan(&free_slots);
state->sampler_map[y_samp][1] = extra;
add_sampler(state, y_samp, extra, "v");
} else {
/* single additional UV plane: */
extra = u_bit_scan(&free_slots);
state->sampler_map[y_samp][0] = extra;
add_sampler(state, y_samp, extra, "uv");
}
}
}
@ -88,7 +127,7 @@ lower_tex_src_plane_block(lower_tex_src_state *state, nir_block *block)
tex->texture_index = tex->sampler_index =
state->sampler_map[y_samp][plane[0].i32 - 1];
state->info->textures_used |= 1u << tex->texture_index;
state->shader->info.textures_used |= 1u << tex->texture_index;
}
nir_tex_instr_remove_src(tex, plane_index);
@ -112,7 +151,7 @@ st_nir_lower_tex_src_plane(struct nir_shader *shader, unsigned free_slots,
{
lower_tex_src_state state = {0};
state.info = &shader->info;
state.shader = shader;
state.lower_2plane = lower_2plane;
state.lower_3plane = lower_3plane;