* Lowers fixed-function blending to a load of the destination color and a
* series of ALU operations before the store of the output.
*/
-#include "util/u_format.h"
+#include "util/format/u_format.h"
#include "vc4_qir.h"
#include "compiler/nir/nir_builder.h"
+#include "compiler/nir/nir_format_convert.h"
#include "vc4_context.h"
static bool
return &load->dest.ssa;
}
-static nir_ssa_def *
-vc4_nir_srgb_decode(nir_builder *b, nir_ssa_def *srgb)
-{
- nir_ssa_def *is_low = nir_flt(b, srgb, nir_imm_float(b, 0.04045));
- nir_ssa_def *low = nir_fmul(b, srgb, nir_imm_float(b, 1.0 / 12.92));
- nir_ssa_def *high = nir_fpow(b,
- nir_fmul(b,
- nir_fadd(b, srgb,
- nir_imm_float(b, 0.055)),
- nir_imm_float(b, 1.0 / 1.055)),
- nir_imm_float(b, 2.4));
-
- return nir_bcsel(b, is_low, low, high);
-}
-
-static nir_ssa_def *
-vc4_nir_srgb_encode(nir_builder *b, nir_ssa_def *linear)
-{
- nir_ssa_def *is_low = nir_flt(b, linear, nir_imm_float(b, 0.0031308));
- nir_ssa_def *low = nir_fmul(b, linear, nir_imm_float(b, 12.92));
- nir_ssa_def *high = nir_fsub(b,
- nir_fmul(b,
- nir_imm_float(b, 1.055),
- nir_fpow(b,
- linear,
- nir_imm_float(b, 0.41666))),
- nir_imm_float(b, 0.055));
-
- return nir_bcsel(b, is_low, low, high);
-}
-
static nir_ssa_def *
vc4_blend_channel_f(nir_builder *b,
nir_ssa_def **src,
return nir_load_system_value(b,
nir_intrinsic_load_blend_const_color_r_float +
channel,
- 0);
+ 0, 32);
case PIPE_BLENDFACTOR_CONST_ALPHA:
return nir_load_blend_const_color_a_float(b);
case PIPE_BLENDFACTOR_ZERO:
nir_load_system_value(b,
nir_intrinsic_load_blend_const_color_r_float +
channel,
- 0));
+ 0, 32));
case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
return nir_fsub(b, nir_imm_float(b, 1.0),
nir_load_blend_const_color_a_float(b));
}
}
-static nir_ssa_def *
-vc4_nir_pipe_compare_func(nir_builder *b, int func,
- nir_ssa_def *src0, nir_ssa_def *src1)
-{
- switch (func) {
- default:
- fprintf(stderr, "Unknown compare func %d\n", func);
- /* FALLTHROUGH */
- case PIPE_FUNC_NEVER:
- return nir_imm_int(b, 0);
- case PIPE_FUNC_ALWAYS:
- return nir_imm_int(b, ~0);
- case PIPE_FUNC_EQUAL:
- return nir_feq(b, src0, src1);
- case PIPE_FUNC_NOTEQUAL:
- return nir_fne(b, src0, src1);
- case PIPE_FUNC_GREATER:
- return nir_flt(b, src1, src0);
- case PIPE_FUNC_GEQUAL:
- return nir_fge(b, src0, src1);
- case PIPE_FUNC_LESS:
- return nir_flt(b, src0, src1);
- case PIPE_FUNC_LEQUAL:
- return nir_fge(b, src1, src0);
- }
-}
-
-static void
-vc4_nir_emit_alpha_test_discard(struct vc4_compile *c, nir_builder *b,
- nir_ssa_def *alpha)
-{
- if (!c->fs_key->alpha_test)
- return;
-
- nir_ssa_def *condition =
- vc4_nir_pipe_compare_func(b, c->fs_key->alpha_test_func,
- alpha,
- nir_load_alpha_ref_float(b));
-
- nir_intrinsic_instr *discard =
- nir_intrinsic_instr_create(b->shader,
- nir_intrinsic_discard_if);
- discard->num_components = 1;
- discard->src[0] = nir_src_for_ssa(nir_inot(b, condition));
- nir_builder_instr_insert(b, &discard->instr);
- c->s->info.fs.uses_discard = true;
-}
-
static nir_ssa_def *
vc4_nir_swizzle_and_pack(struct vc4_compile *c, nir_builder *b,
nir_ssa_def **colors)
if (c->fs_key->sample_alpha_to_one && c->fs_key->msaa)
src_color[3] = nir_imm_float(b, 1.0);
- vc4_nir_emit_alpha_test_discard(c, b, src_color[3]);
-
nir_ssa_def *packed_color;
if (srgb) {
/* Unswizzle the destination color. */
/* Turn dst color to linear. */
for (int i = 0; i < 3; i++)
- dst_color[i] = vc4_nir_srgb_decode(b, dst_color[i]);
+ dst_color[i] = nir_format_srgb_to_linear(b, dst_color[i]);
nir_ssa_def *blend_color[4];
vc4_do_blending_f(c, b, blend_color, src_color, dst_color);
/* sRGB encode the output color */
for (int i = 0; i < 3; i++)
- blend_color[i] = vc4_nir_srgb_encode(b, blend_color[i]);
+ blend_color[i] = nir_format_linear_to_srgb(b, blend_color[i]);
packed_color = vc4_nir_swizzle_and_pack(c, b, blend_color);
} else {
nir_imm_int(b, ~colormask)));
}
-static int
-vc4_nir_next_output_driver_location(nir_shader *s)
-{
- int maxloc = -1;
-
- nir_foreach_variable(var, &s->outputs)
- maxloc = MAX2(maxloc, (int)var->data.driver_location);
-
- return maxloc + 1;
-}
-
static void
vc4_nir_store_sample_mask(struct vc4_compile *c, nir_builder *b,
nir_ssa_def *val)
nir_variable *sample_mask = nir_variable_create(c->s, nir_var_shader_out,
glsl_uint_type(),
"sample_mask");
- sample_mask->data.driver_location =
- vc4_nir_next_output_driver_location(c->s);
+ sample_mask->data.driver_location = c->s->num_outputs++;
sample_mask->data.location = FRAG_RESULT_SAMPLE_MASK;
nir_intrinsic_instr *intr =
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