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
32typedef struct {
33   uint16_t stride;
34   uint16_t varying_count;
35} nir_xfb_buffer_info;
36
37typedef 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
45typedef struct {
46   const struct glsl_type *type;
47   uint8_t buffer;
48   uint16_t offset;
49} nir_xfb_varying_info;
50
51typedef 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
62typedef struct nir_xfb_varyings_info {
63   uint16_t varying_count;
64   nir_xfb_varying_info varyings[0];
65} nir_xfb_varyings_info;
66
67static inline size_t
68nir_xfb_info_size(uint16_t output_count)
69{
70   return sizeof(nir_xfb_info) + sizeof(nir_xfb_output_info) * output_count;
71}
72
73nir_xfb_info *
74nir_gather_xfb_info(const nir_shader *shader, void *mem_ctx);
75
76nir_xfb_info *
77nir_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