1 /*
2 * Copyright © 2012 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 #include "intel_batchbuffer.h"
25
26 #include "brw_context.h"
27 #include "brw_defines.h"
28 #include "brw_multisample_state.h"
29
30 /**
31 * 3DSTATE_MULTISAMPLE
32 */
33 void
gen8_emit_3dstate_multisample(struct brw_context * brw,unsigned num_samples)34 gen8_emit_3dstate_multisample(struct brw_context *brw, unsigned num_samples)
35 {
36 assert(num_samples <= 16);
37
38 unsigned log2_samples = ffs(MAX2(num_samples, 1)) - 1;
39
40 BEGIN_BATCH(2);
41 OUT_BATCH(GEN8_3DSTATE_MULTISAMPLE << 16 | (2 - 2));
42 OUT_BATCH(MS_PIXEL_LOCATION_CENTER | log2_samples << 1);
43 ADVANCE_BATCH();
44 }
45
46 /**
47 * 3DSTATE_SAMPLE_PATTERN
48 */
49 void
gen8_emit_3dstate_sample_pattern(struct brw_context * brw)50 gen8_emit_3dstate_sample_pattern(struct brw_context *brw)
51 {
52 BEGIN_BATCH(9);
53 OUT_BATCH(_3DSTATE_SAMPLE_PATTERN << 16 | (9 - 2));
54
55 /* 16x MSAA */
56 OUT_BATCH(brw_multisample_positions_16x[0]); /* positions 3, 2, 1, 0 */
57 OUT_BATCH(brw_multisample_positions_16x[1]); /* positions 7, 6, 5, 4 */
58 OUT_BATCH(brw_multisample_positions_16x[2]); /* positions 11, 10, 9, 8 */
59 OUT_BATCH(brw_multisample_positions_16x[3]); /* positions 15, 14, 13, 12 */
60
61 /* 8x MSAA */
62 OUT_BATCH(brw_multisample_positions_8x[1]); /* sample positions 7654 */
63 OUT_BATCH(brw_multisample_positions_8x[0]); /* sample positions 3210 */
64
65 /* 4x MSAA */
66 OUT_BATCH(brw_multisample_positions_4x);
67
68 /* 1x and 2x MSAA */
69 OUT_BATCH(brw_multisample_positions_1x_2x);
70 ADVANCE_BATCH();
71 }
72
73
74 static void
upload_multisample_state(struct brw_context * brw)75 upload_multisample_state(struct brw_context *brw)
76 {
77 gen8_emit_3dstate_multisample(brw, brw->num_samples);
78 gen6_emit_3dstate_sample_mask(brw, gen6_determine_sample_mask(brw));
79 }
80
81 const struct brw_tracked_state gen8_multisample_state = {
82 .dirty = {
83 .mesa = _NEW_MULTISAMPLE,
84 .brw = BRW_NEW_BLORP |
85 BRW_NEW_CONTEXT |
86 BRW_NEW_NUM_SAMPLES,
87 },
88 .emit = upload_multisample_state
89 };
90