1 /*
2 * Copyright © 2018 Intel 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 #ifndef NIR_XFB_INFO_H
25 #define NIR_XFB_INFO_H
26
27 #include "nir.h"
28
29 #define NIR_MAX_XFB_BUFFERS 4
30 #define NIR_MAX_XFB_STREAMS 4
31
32 typedef struct {
33 uint16_t stride;
34 uint16_t varying_count;
35 } nir_xfb_buffer_info;
36
37 typedef struct {
38 uint8_t buffer;
39 uint16_t offset;
40 uint8_t location;
41 uint8_t component_mask;
42 uint8_t component_offset;
43 } nir_xfb_output_info;
44
45 typedef struct {
46 const struct glsl_type *type;
47 uint8_t buffer;
48 uint16_t offset;
49 } nir_xfb_varying_info;
50
51 typedef struct nir_xfb_info {
52 uint8_t buffers_written;
53 uint8_t streams_written;
54
55 nir_xfb_buffer_info buffers[NIR_MAX_XFB_BUFFERS];
56 uint8_t buffer_to_stream[NIR_MAX_XFB_STREAMS];
57
58 uint16_t output_count;
59 nir_xfb_output_info outputs[0];
60 } nir_xfb_info;
61
62 typedef struct nir_xfb_varyings_info {
63 uint16_t varying_count;
64 nir_xfb_varying_info varyings[0];
65 } nir_xfb_varyings_info;
66
67 static inline size_t
nir_xfb_info_size(uint16_t output_count)68 nir_xfb_info_size(uint16_t output_count)
69 {
70 return sizeof(nir_xfb_info) + sizeof(nir_xfb_output_info) * output_count;
71 }
72
73 nir_xfb_info *
74 nir_gather_xfb_info(const nir_shader *shader, void *mem_ctx);
75
76 nir_xfb_info *
77 nir_gather_xfb_info_with_varyings(const nir_shader *shader,
78 void *mem_ctx,
79 nir_xfb_varyings_info **varyings_info);
80 #endif /* NIR_XFB_INFO_H */
81