1 /**************************************************************************
2 *
3 * Copyright 2023 Red Hat.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 **************************************************************************/
25
26 #include "draw/draw_context.h"
27 #include "draw/draw_private.h"
28 #include "draw/draw_pt.h"
29 #include "draw/draw_mesh.h"
30
31 /*
32 * Mesh shader middle end,
33 * This doesn't need a frontend as mesh shader frontend
34 * is done with compute shaders in llvmpipe.
35 */
36
37 struct mesh_pipeline_middle_end {
38 struct draw_pt_middle_end base;
39 struct draw_context *draw;
40
41 struct pt_so_emit *so_emit;
42 struct pt_post_vs *post_vs;
43 };
44
45 /** cast wrapper */
46 static inline struct mesh_pipeline_middle_end *
mesh_pipeline_middle_end(struct draw_pt_middle_end * middle)47 mesh_pipeline_middle_end(struct draw_pt_middle_end *middle)
48 {
49 return (struct mesh_pipeline_middle_end *) middle;
50 }
51
52 static void
mesh_pipeline_destroy(struct draw_pt_middle_end * middle)53 mesh_pipeline_destroy(struct draw_pt_middle_end *middle)
54 {
55 struct mesh_pipeline_middle_end *mpme = mesh_pipeline_middle_end(middle);
56
57 if (mpme->so_emit)
58 draw_pt_so_emit_destroy(mpme->so_emit);
59 if (mpme->post_vs)
60 draw_pt_post_vs_destroy(mpme->post_vs);
61 FREE(middle);
62 }
63
64 static void
mesh_middle_end_prepare(struct draw_pt_middle_end * middle,enum mesa_prim prim,unsigned opt,unsigned * max_vertices)65 mesh_middle_end_prepare(struct draw_pt_middle_end *middle,
66 enum mesa_prim prim,
67 unsigned opt,
68 unsigned *max_vertices)
69 {
70 struct mesh_pipeline_middle_end *mpme = mesh_pipeline_middle_end(middle);
71 struct draw_context *draw = mpme->draw;
72 enum mesa_prim out_prim = draw->ms.mesh_shader->output_primitive;
73 unsigned point_clip = draw->rasterizer->fill_front == PIPE_POLYGON_MODE_POINT ||
74 out_prim == MESA_PRIM_POINTS;
75 draw_pt_post_vs_prepare(mpme->post_vs,
76 draw->clip_xy,
77 draw->clip_z,
78 draw->clip_user,
79 point_clip ? draw->guard_band_points_lines_xy :
80 draw->guard_band_xy,
81 draw->bypass_viewport,
82 draw->rasterizer->clip_halfz,
83 false);
84
85 draw_pt_so_emit_prepare(mpme->so_emit, false);
86
87 draw_do_flush(draw, DRAW_FLUSH_BACKEND);
88
89 }
90
91 void
draw_mesh_middle_end_run(struct draw_pt_middle_end * middle,struct draw_vertex_info * vert_info,struct draw_prim_info * prim_info)92 draw_mesh_middle_end_run(struct draw_pt_middle_end *middle,
93 struct draw_vertex_info *vert_info,
94 struct draw_prim_info *prim_info)
95 {
96 struct mesh_pipeline_middle_end *mpme = mesh_pipeline_middle_end(middle);
97
98 draw_pt_post_vs_run(mpme->post_vs, vert_info, prim_info);
99
100 /* just for primgen query */
101 draw_pt_so_emit(mpme->so_emit, 1, vert_info, prim_info);
102 draw_pipeline_run_linear(mpme->draw, vert_info, prim_info);
103 }
104
105 struct draw_pt_middle_end *
draw_pt_mesh_pipeline_or_emit(struct draw_context * draw)106 draw_pt_mesh_pipeline_or_emit(struct draw_context *draw)
107 {
108 struct mesh_pipeline_middle_end *mpme =
109 CALLOC_STRUCT(mesh_pipeline_middle_end);
110 if (!mpme)
111 goto fail;
112
113 mpme->base.prepare = mesh_middle_end_prepare;
114 mpme->base.destroy = mesh_pipeline_destroy;
115 mpme->draw = draw;
116
117 mpme->post_vs = draw_pt_post_vs_create(draw);
118 if (!mpme->post_vs)
119 goto fail;
120
121 mpme->so_emit = draw_pt_so_emit_create(draw);
122 if (!mpme->so_emit)
123 goto fail;
124
125 return &mpme->base;
126 fail:
127 if (mpme)
128 mesh_pipeline_destroy(&mpme->base);
129
130 return NULL;
131 }
132