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radeonsi: remove 'Authors:' comments
[mesa.git] / src / gallium / drivers / radeonsi / si_state_msaa.c
1 /*
2 * Copyright 2014 Advanced Micro Devices, Inc.
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24 #include "si_pipe.h"
25 #include "sid.h"
26 #include "radeon/r600_cs.h"
27
28 /* For MSAA sample positions. */
29 #define FILL_SREG(s0x, s0y, s1x, s1y, s2x, s2y, s3x, s3y) \
30 (((s0x) & 0xf) | (((unsigned)(s0y) & 0xf) << 4) | \
31 (((unsigned)(s1x) & 0xf) << 8) | (((unsigned)(s1y) & 0xf) << 12) | \
32 (((unsigned)(s2x) & 0xf) << 16) | (((unsigned)(s2y) & 0xf) << 20) | \
33 (((unsigned)(s3x) & 0xf) << 24) | (((unsigned)(s3y) & 0xf) << 28))
34
35 /* 2xMSAA
36 * There are two locations (4, 4), (-4, -4). */
37 static const uint32_t sample_locs_2x[4] = {
38 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
39 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
40 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
41 FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
42 };
43 /* 4xMSAA
44 * There are 4 locations: (-2, -6), (6, -2), (-6, 2), (2, 6). */
45 static const uint32_t sample_locs_4x[4] = {
46 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
47 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
48 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
49 FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
50 };
51
52 /* Cayman 8xMSAA */
53 static const uint32_t sample_locs_8x[] = {
54 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
55 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
56 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
57 FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
58 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
59 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
60 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
61 FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
62 };
63 /* Cayman 16xMSAA */
64 static const uint32_t sample_locs_16x[] = {
65 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
66 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
67 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
68 FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
69 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
70 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
71 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
72 FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
73 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
74 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
75 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
76 FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
77 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
78 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
79 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
80 FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
81 };
82
83 static void si_get_sample_position(struct pipe_context *ctx, unsigned sample_count,
84 unsigned sample_index, float *out_value)
85 {
86 int offset, index;
87 struct {
88 int idx:4;
89 } val;
90
91 switch (sample_count) {
92 case 1:
93 default:
94 out_value[0] = out_value[1] = 0.5;
95 break;
96 case 2:
97 offset = 4 * (sample_index * 2);
98 val.idx = (sample_locs_2x[0] >> offset) & 0xf;
99 out_value[0] = (float)(val.idx + 8) / 16.0f;
100 val.idx = (sample_locs_2x[0] >> (offset + 4)) & 0xf;
101 out_value[1] = (float)(val.idx + 8) / 16.0f;
102 break;
103 case 4:
104 offset = 4 * (sample_index * 2);
105 val.idx = (sample_locs_4x[0] >> offset) & 0xf;
106 out_value[0] = (float)(val.idx + 8) / 16.0f;
107 val.idx = (sample_locs_4x[0] >> (offset + 4)) & 0xf;
108 out_value[1] = (float)(val.idx + 8) / 16.0f;
109 break;
110 case 8:
111 offset = 4 * (sample_index % 4 * 2);
112 index = (sample_index / 4) * 4;
113 val.idx = (sample_locs_8x[index] >> offset) & 0xf;
114 out_value[0] = (float)(val.idx + 8) / 16.0f;
115 val.idx = (sample_locs_8x[index] >> (offset + 4)) & 0xf;
116 out_value[1] = (float)(val.idx + 8) / 16.0f;
117 break;
118 case 16:
119 offset = 4 * (sample_index % 4 * 2);
120 index = (sample_index / 4) * 4;
121 val.idx = (sample_locs_16x[index] >> offset) & 0xf;
122 out_value[0] = (float)(val.idx + 8) / 16.0f;
123 val.idx = (sample_locs_16x[index] >> (offset + 4)) & 0xf;
124 out_value[1] = (float)(val.idx + 8) / 16.0f;
125 break;
126 }
127 }
128
129 void si_emit_sample_locations(struct radeon_winsys_cs *cs, int nr_samples)
130 {
131 switch (nr_samples) {
132 default:
133 case 1:
134 radeon_set_context_reg(cs, R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 0);
135 radeon_set_context_reg(cs, R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, 0);
136 radeon_set_context_reg(cs, R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, 0);
137 radeon_set_context_reg(cs, R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, 0);
138 break;
139 case 2:
140 radeon_set_context_reg(cs, R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, sample_locs_2x[0]);
141 radeon_set_context_reg(cs, R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, sample_locs_2x[1]);
142 radeon_set_context_reg(cs, R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, sample_locs_2x[2]);
143 radeon_set_context_reg(cs, R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, sample_locs_2x[3]);
144 break;
145 case 4:
146 radeon_set_context_reg(cs, R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, sample_locs_4x[0]);
147 radeon_set_context_reg(cs, R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, sample_locs_4x[1]);
148 radeon_set_context_reg(cs, R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, sample_locs_4x[2]);
149 radeon_set_context_reg(cs, R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, sample_locs_4x[3]);
150 break;
151 case 8:
152 radeon_set_context_reg_seq(cs, R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 14);
153 radeon_emit(cs, sample_locs_8x[0]);
154 radeon_emit(cs, sample_locs_8x[4]);
155 radeon_emit(cs, 0);
156 radeon_emit(cs, 0);
157 radeon_emit(cs, sample_locs_8x[1]);
158 radeon_emit(cs, sample_locs_8x[5]);
159 radeon_emit(cs, 0);
160 radeon_emit(cs, 0);
161 radeon_emit(cs, sample_locs_8x[2]);
162 radeon_emit(cs, sample_locs_8x[6]);
163 radeon_emit(cs, 0);
164 radeon_emit(cs, 0);
165 radeon_emit(cs, sample_locs_8x[3]);
166 radeon_emit(cs, sample_locs_8x[7]);
167 break;
168 case 16:
169 radeon_set_context_reg_seq(cs, R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 16);
170 radeon_emit(cs, sample_locs_16x[0]);
171 radeon_emit(cs, sample_locs_16x[4]);
172 radeon_emit(cs, sample_locs_16x[8]);
173 radeon_emit(cs, sample_locs_16x[12]);
174 radeon_emit(cs, sample_locs_16x[1]);
175 radeon_emit(cs, sample_locs_16x[5]);
176 radeon_emit(cs, sample_locs_16x[9]);
177 radeon_emit(cs, sample_locs_16x[13]);
178 radeon_emit(cs, sample_locs_16x[2]);
179 radeon_emit(cs, sample_locs_16x[6]);
180 radeon_emit(cs, sample_locs_16x[10]);
181 radeon_emit(cs, sample_locs_16x[14]);
182 radeon_emit(cs, sample_locs_16x[3]);
183 radeon_emit(cs, sample_locs_16x[7]);
184 radeon_emit(cs, sample_locs_16x[11]);
185 radeon_emit(cs, sample_locs_16x[15]);
186 break;
187 }
188 }
189
190 void si_init_msaa_functions(struct si_context *sctx)
191 {
192 int i;
193
194 sctx->b.b.get_sample_position = si_get_sample_position;
195
196 si_get_sample_position(&sctx->b.b, 1, 0, sctx->sample_locations_1x[0]);
197
198 for (i = 0; i < 2; i++)
199 si_get_sample_position(&sctx->b.b, 2, i, sctx->sample_locations_2x[i]);
200 for (i = 0; i < 4; i++)
201 si_get_sample_position(&sctx->b.b, 4, i, sctx->sample_locations_4x[i]);
202 for (i = 0; i < 8; i++)
203 si_get_sample_position(&sctx->b.b, 8, i, sctx->sample_locations_8x[i]);
204 for (i = 0; i < 16; i++)
205 si_get_sample_position(&sctx->b.b, 16, i, sctx->sample_locations_16x[i]);
206 }