1 /*
2 * Copyright © 2023 Valve Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #include "nir.h"
25 #include "nir_builder.h"
26 #include "radv_nir.h"
27 #include "radv_private.h"
28
29 static bool
radv_should_lower_poly_line_smooth(nir_shader * nir,const struct radv_graphics_state_key * gfx_state)30 radv_should_lower_poly_line_smooth(nir_shader *nir, const struct radv_graphics_state_key *gfx_state)
31 {
32 nir_function_impl *impl = nir_shader_get_entrypoint(nir);
33
34 if (!gfx_state->rs.line_smooth_enabled && !gfx_state->dynamic_line_rast_mode)
35 return false;
36
37 nir_foreach_block (block, impl) {
38 nir_foreach_instr (instr, block) {
39 if (instr->type != nir_instr_type_intrinsic)
40 continue;
41
42 nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
43 if (intr->intrinsic != nir_intrinsic_store_output)
44 continue;
45
46 /* Line smooth lowering is only valid for vec4. */
47 if (intr->num_components != 4)
48 return false;
49 }
50 }
51
52 return true;
53 }
54
55 void
radv_nir_lower_poly_line_smooth(nir_shader * nir,const struct radv_graphics_state_key * gfx_state)56 radv_nir_lower_poly_line_smooth(nir_shader *nir, const struct radv_graphics_state_key *gfx_state)
57 {
58 bool progress = false;
59
60 if (!radv_should_lower_poly_line_smooth(nir, gfx_state))
61 return;
62
63 NIR_PASS(progress, nir, nir_lower_poly_line_smooth, RADV_NUM_SMOOTH_AA_SAMPLES);
64 if (progress)
65 nir_shader_gather_info(nir, nir_shader_get_entrypoint(nir));
66 }
67