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nir: allow nir_lower_fb_read to support multiple render targets

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Signed-off-by: Amber Amber <amber@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21260>
This commit is contained in:
Amber
2023-02-09 14:04:46 +01:00
committed by Marge Bot
parent c54b8dfe67
commit 1462da2a70
1 changed files with 4 additions and 11 deletions
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src/compiler/nir/nir_lower_fb_read.c
+4 -11
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@@ -56,16 +56,6 @@ nir_lower_fb_read_instr(nir_builder *b, nir_instr *instr, UNUSED void *cb_data)
if (intr->intrinsic != nir_intrinsic_load_output)
return false;
/* TODO KHR_blend_equation_advanced is limited to non-MRT
* scenarios.. but possible there are other extensions
* where this pass would be useful that do support MRT?
*
* I guess for now I'll leave that as an exercise for the
* reader.
*/
if (nir_intrinsic_base(intr) != 0 || nir_src_as_uint(intr->src[0]) != 0)
return false;
b->cursor = nir_before_instr(&intr->instr);
nir_ssa_def *fragcoord = nir_load_frag_coord(b);
@@ -73,7 +63,7 @@ nir_lower_fb_read_instr(nir_builder *b, nir_instr *instr, UNUSED void *cb_data)
fragcoord = nir_f2i32(b, fragcoord);
nir_tex_instr *tex = nir_tex_instr_create(b->shader, 2);
nir_tex_instr *tex = nir_tex_instr_create(b->shader, 3);
tex->op = nir_texop_txf_ms_fb;
tex->sampler_dim = GLSL_SAMPLER_DIM_2D;
tex->coord_components = 2;
@@ -82,6 +72,9 @@ nir_lower_fb_read_instr(nir_builder *b, nir_instr *instr, UNUSED void *cb_data)
tex->src[0].src = nir_src_for_ssa(nir_channels(b, fragcoord, 0x3));
tex->src[1].src_type = nir_tex_src_ms_index;
tex->src[1].src = nir_src_for_ssa(sampid);
struct nir_io_semantics io = nir_intrinsic_io_semantics(intr);
tex->src[2].src = nir_src_for_ssa(nir_imm_intN_t(b, io.location - FRAG_RESULT_DATA0, 32));
tex->src[2].src_type = nir_tex_src_texture_handle;
nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, NULL);
nir_builder_instr_insert(b, &tex->instr);