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
33 struct intel_sample_position {
34 float x;
35 float y;
36 };
37
38 extern const struct intel_sample_position intel_sample_positions_1x[];
39 extern const struct intel_sample_position intel_sample_positions_2x[];
40 extern const struct intel_sample_position intel_sample_positions_4x[];
41 extern const struct intel_sample_position intel_sample_positions_8x[];
42 extern const struct intel_sample_position intel_sample_positions_16x[];
43
44 static inline const struct intel_sample_position *
intel_get_sample_positions(int samples)45 intel_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) \
70 prefix##sample_idx##XOffset = arr[sample_idx].x; \
71 prefix##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