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 #include "intel_fbo.h"
26 #include "brw_context.h"
27 #include "brw_defines.h"
28 #include "brw_state.h"
29 #include "main/stencil.h"
30
31 static void
gen8_upload_wm_depth_stencil(struct brw_context * brw)32 gen8_upload_wm_depth_stencil(struct brw_context *brw)
33 {
34 struct gl_context *ctx = &brw->ctx;
35 uint32_t dw1 = 0, dw2 = 0, dw3 = 0;
36
37 /* _NEW_BUFFERS */
38 struct intel_renderbuffer *depth_irb =
39 intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_DEPTH);
40
41 struct gl_stencil_attrib *stencil = &ctx->Stencil;
42
43 /* _NEW_STENCIL | _NEW_BUFFERS */
44 if (stencil->_Enabled) {
45 #define FUNC intel_translate_compare_func
46 #define OP intel_translate_stencil_op
47
48 dw1 |=
49 GEN8_WM_DS_STENCIL_TEST_ENABLE |
50 FUNC(stencil->Function[0]) << GEN8_WM_DS_STENCIL_FUNC_SHIFT |
51 OP(stencil->FailFunc[0]) << GEN8_WM_DS_STENCIL_FAIL_OP_SHIFT |
52 OP(stencil->ZFailFunc[0]) << GEN8_WM_DS_Z_FAIL_OP_SHIFT |
53 OP(stencil->ZPassFunc[0]) << GEN8_WM_DS_Z_PASS_OP_SHIFT;
54
55 if (stencil->_WriteEnabled)
56 dw1 |= GEN8_WM_DS_STENCIL_BUFFER_WRITE_ENABLE;
57
58 dw2 |=
59 SET_FIELD(stencil->WriteMask[0] & 0xff, GEN8_WM_DS_STENCIL_WRITE_MASK) |
60 SET_FIELD(stencil->ValueMask[0] & 0xff, GEN8_WM_DS_STENCIL_TEST_MASK);
61
62 if (stencil->_TestTwoSide) {
63 const int b = stencil->_BackFace;
64
65 dw1 |=
66 GEN8_WM_DS_DOUBLE_SIDED_STENCIL_ENABLE |
67 FUNC(stencil->Function[b]) << GEN8_WM_DS_BF_STENCIL_FUNC_SHIFT |
68 OP(stencil->FailFunc[b]) << GEN8_WM_DS_BF_STENCIL_FAIL_OP_SHIFT |
69 OP(stencil->ZFailFunc[b]) << GEN8_WM_DS_BF_Z_FAIL_OP_SHIFT |
70 OP(stencil->ZPassFunc[b]) << GEN8_WM_DS_BF_Z_PASS_OP_SHIFT;
71
72 dw2 |= SET_FIELD(stencil->WriteMask[b] & 0xff,
73 GEN8_WM_DS_BF_STENCIL_WRITE_MASK) |
74 SET_FIELD(stencil->ValueMask[b] & 0xff,
75 GEN8_WM_DS_BF_STENCIL_TEST_MASK);
76 }
77
78 if (brw->gen >= 9) {
79 int stencil_ref = _mesa_get_stencil_ref(ctx, 0);
80 int backface_ref = _mesa_get_stencil_ref(ctx, ctx->Stencil._BackFace);
81
82 dw3 = SET_FIELD(stencil_ref, GEN9_WM_DS_STENCIL_REF) |
83 SET_FIELD(backface_ref, GEN9_WM_DS_BF_STENCIL_REF);
84 }
85 }
86
87 /* _NEW_DEPTH */
88 if (ctx->Depth.Test && depth_irb) {
89 dw1 |=
90 GEN8_WM_DS_DEPTH_TEST_ENABLE |
91 FUNC(ctx->Depth.Func) << GEN8_WM_DS_DEPTH_FUNC_SHIFT;
92
93 if (brw_depth_writes_enabled(brw))
94 dw1 |= GEN8_WM_DS_DEPTH_BUFFER_WRITE_ENABLE;
95 }
96
97 int pkt_len = brw->gen >= 9 ? 4 : 3;
98
99 BEGIN_BATCH(pkt_len);
100 OUT_BATCH(_3DSTATE_WM_DEPTH_STENCIL << 16 | (pkt_len - 2));
101 OUT_BATCH(dw1);
102 OUT_BATCH(dw2);
103 if (pkt_len > 3) {
104 OUT_BATCH(dw3);
105 }
106 ADVANCE_BATCH();
107 }
108
109 const struct brw_tracked_state gen8_wm_depth_stencil = {
110 .dirty = {
111 .mesa = _NEW_BUFFERS |
112 _NEW_DEPTH |
113 _NEW_STENCIL,
114 .brw = BRW_NEW_BLORP |
115 BRW_NEW_CONTEXT,
116 },
117 .emit = gen8_upload_wm_depth_stencil,
118 };
119