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#ifdef __cplusplus
30extern "C" {
31#endif
32
33#define NIR_MAX_XFB_BUFFERS 4
34#define NIR_MAX_XFB_STREAMS 4
35
36typedef struct {
37   uint16_t stride;
38   uint16_t varying_count;
39} nir_xfb_buffer_info;
40
41typedef struct {
42   uint8_t buffer;
43   uint16_t offset;
44   uint8_t location;
45   uint8_t component_mask;
46   uint8_t component_offset;
47} nir_xfb_output_info;
48
49typedef struct {
50   const struct glsl_type *type;
51   uint8_t buffer;
52   uint16_t offset;
53} nir_xfb_varying_info;
54
55typedef struct nir_xfb_info {
56   uint8_t buffers_written;
57   uint8_t streams_written;
58
59   nir_xfb_buffer_info buffers[NIR_MAX_XFB_BUFFERS];
60   uint8_t buffer_to_stream[NIR_MAX_XFB_BUFFERS];
61
62   uint16_t output_count;
63   nir_xfb_output_info outputs[0];
64} nir_xfb_info;
65
66typedef struct nir_xfb_varyings_info {
67   uint16_t varying_count;
68   nir_xfb_varying_info varyings[0];
69} nir_xfb_varyings_info;
70
71static inline size_t
72nir_xfb_info_size(uint16_t output_count)
73{
74   return sizeof(nir_xfb_info) + sizeof(nir_xfb_output_info) * output_count;
75}
76
77void nir_shader_gather_xfb_info(nir_shader *shader);
78
79void
80nir_gather_xfb_info_with_varyings(nir_shader *shader,
81                                  void *mem_ctx,
82                                  nir_xfb_varyings_info **varyings_info);
83
84nir_xfb_info *
85nir_gather_xfb_info_from_intrinsics(nir_shader *nir,
86                                    int slot_to_register[NUM_TOTAL_VARYING_SLOTS]);
87
88void
89nir_print_xfb_info(nir_xfb_info *info, FILE *fp);
90
91#ifdef __cplusplus
92} /* extern "C" */
93#endif
94
95#endif /* NIR_XFB_INFO_H */
96