1/*
2 * Copyright © 2016 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#ifndef INTEL_SAMPLE_POSITIONS_H
24#define INTEL_SAMPLE_POSITIONS_H
25
26#include <util/macros.h>
27
28/*
29 * This file defines the standard multisample positions used by both GL and
30 * Vulkan.  These correspond to the Vulkan "standard sample locations".
31 */
32
33struct intel_sample_position {
34   float x;
35   float y;
36};
37
38extern const struct intel_sample_position intel_sample_positions_1x[];
39extern const struct intel_sample_position intel_sample_positions_2x[];
40extern const struct intel_sample_position intel_sample_positions_4x[];
41extern const struct intel_sample_position intel_sample_positions_8x[];
42extern const struct intel_sample_position intel_sample_positions_16x[];
43
44static inline const struct intel_sample_position *
45intel_get_sample_positions(int samples)
46{
47   switch (samples) {
48   case 1: return intel_sample_positions_1x;
49   case 2: return intel_sample_positions_2x;
50   case 4: return intel_sample_positions_4x;
51   case 8: return intel_sample_positions_8x;
52   case 16: return intel_sample_positions_16x;
53   default: unreachable("Invalid sample count");
54   }
55}
56
57/* Examples:
58 * in case of GFX_VER < 8:
59 * INTEL_SAMPLE_POS_ELEM(ms.Sample, info->pSampleLocations, 0); expands to:
60 *    ms.Sample0XOffset = info->pSampleLocations[0].x;
61 *    ms.Sample0YOffset = info->pSampleLocations[0].y;
62 *
63 * in case of GFX_VER >= 8:
64 * INTEL_SAMPLE_POS_ELEM(sp._16xSample, info->pSampleLocations, 0); expands to:
65 *    sp._16xSample0XOffset = info->pSampleLocations[0].x;
66 *    sp._16xSample0YOffset = info->pSampleLocations[0].y;
67 */
68
69#define INTEL_SAMPLE_POS_ELEM(prefix, arr, sample_idx) \
70prefix##sample_idx##XOffset = arr[sample_idx].x; \
71prefix##sample_idx##YOffset = arr[sample_idx].y;
72
73#define INTEL_SAMPLE_POS_1X_ARRAY(prefix, arr)\
74   INTEL_SAMPLE_POS_ELEM(prefix, arr, 0);
75
76#define INTEL_SAMPLE_POS_2X_ARRAY(prefix, arr) \
77   INTEL_SAMPLE_POS_ELEM(prefix, arr, 0); \
78   INTEL_SAMPLE_POS_ELEM(prefix, arr, 1);
79
80#define INTEL_SAMPLE_POS_4X_ARRAY(prefix, arr) \
81   INTEL_SAMPLE_POS_ELEM(prefix, arr, 0); \
82   INTEL_SAMPLE_POS_ELEM(prefix, arr, 1); \
83   INTEL_SAMPLE_POS_ELEM(prefix, arr, 2); \
84   INTEL_SAMPLE_POS_ELEM(prefix, arr, 3);
85
86#define INTEL_SAMPLE_POS_8X_ARRAY(prefix, arr) \
87   INTEL_SAMPLE_POS_ELEM(prefix, arr, 0); \
88   INTEL_SAMPLE_POS_ELEM(prefix, arr, 1); \
89   INTEL_SAMPLE_POS_ELEM(prefix, arr, 2); \
90   INTEL_SAMPLE_POS_ELEM(prefix, arr, 3); \
91   INTEL_SAMPLE_POS_ELEM(prefix, arr, 4); \
92   INTEL_SAMPLE_POS_ELEM(prefix, arr, 5); \
93   INTEL_SAMPLE_POS_ELEM(prefix, arr, 6); \
94   INTEL_SAMPLE_POS_ELEM(prefix, arr, 7);
95
96#define INTEL_SAMPLE_POS_16X_ARRAY(prefix, arr) \
97   INTEL_SAMPLE_POS_ELEM(prefix, arr, 0); \
98   INTEL_SAMPLE_POS_ELEM(prefix, arr, 1); \
99   INTEL_SAMPLE_POS_ELEM(prefix, arr, 2); \
100   INTEL_SAMPLE_POS_ELEM(prefix, arr, 3); \
101   INTEL_SAMPLE_POS_ELEM(prefix, arr, 4); \
102   INTEL_SAMPLE_POS_ELEM(prefix, arr, 5); \
103   INTEL_SAMPLE_POS_ELEM(prefix, arr, 6); \
104   INTEL_SAMPLE_POS_ELEM(prefix, arr, 7); \
105   INTEL_SAMPLE_POS_ELEM(prefix, arr, 8); \
106   INTEL_SAMPLE_POS_ELEM(prefix, arr, 9); \
107   INTEL_SAMPLE_POS_ELEM(prefix, arr, 10); \
108   INTEL_SAMPLE_POS_ELEM(prefix, arr, 11); \
109   INTEL_SAMPLE_POS_ELEM(prefix, arr, 12); \
110   INTEL_SAMPLE_POS_ELEM(prefix, arr, 13); \
111   INTEL_SAMPLE_POS_ELEM(prefix, arr, 14); \
112   INTEL_SAMPLE_POS_ELEM(prefix, arr, 15);
113
114#define INTEL_SAMPLE_POS_1X(prefix) \
115   INTEL_SAMPLE_POS_1X_ARRAY(prefix, intel_sample_positions_1x)
116
117#define INTEL_SAMPLE_POS_2X(prefix) \
118   INTEL_SAMPLE_POS_2X_ARRAY(prefix, intel_sample_positions_2x)
119
120#define INTEL_SAMPLE_POS_4X(prefix) \
121   INTEL_SAMPLE_POS_4X_ARRAY(prefix, intel_sample_positions_4x)
122
123#define INTEL_SAMPLE_POS_8X(prefix) \
124   INTEL_SAMPLE_POS_8X_ARRAY(prefix, intel_sample_positions_8x)
125
126#define INTEL_SAMPLE_POS_16X(prefix) \
127   INTEL_SAMPLE_POS_16X_ARRAY(prefix, intel_sample_positions_16x)
128
129#endif /* INTEL_SAMPLE_POSITIONS_H */
130