1 /*
2 * Copyright (C) 2016 Rob Clark <robclark@freedesktop.org>
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 * Authors:
24 * Rob Clark <robclark@freedesktop.org>
25 */
26
27 #include "pipe/p_state.h"
28 #include "util/u_blend.h"
29 #include "util/u_string.h"
30 #include "util/u_memory.h"
31
32 #include "fd5_blend.h"
33 #include "fd5_context.h"
34 #include "fd5_format.h"
35
36 // XXX move somewhere common.. same across a3xx/a4xx/a5xx..
37 static enum a3xx_rb_blend_opcode
blend_func(unsigned func)38 blend_func(unsigned func)
39 {
40 switch (func) {
41 case PIPE_BLEND_ADD:
42 return BLEND_DST_PLUS_SRC;
43 case PIPE_BLEND_MIN:
44 return BLEND_MIN_DST_SRC;
45 case PIPE_BLEND_MAX:
46 return BLEND_MAX_DST_SRC;
47 case PIPE_BLEND_SUBTRACT:
48 return BLEND_SRC_MINUS_DST;
49 case PIPE_BLEND_REVERSE_SUBTRACT:
50 return BLEND_DST_MINUS_SRC;
51 default:
52 DBG("invalid blend func: %x", func);
53 return 0;
54 }
55 }
56
57 void *
fd5_blend_state_create(struct pipe_context * pctx,const struct pipe_blend_state * cso)58 fd5_blend_state_create(struct pipe_context *pctx,
59 const struct pipe_blend_state *cso)
60 {
61 struct fd5_blend_stateobj *so;
62 enum a3xx_rop_code rop = ROP_COPY;
63 bool reads_dest = false;
64 unsigned i, mrt_blend = 0;
65
66 if (cso->logicop_enable) {
67 rop = cso->logicop_func; /* maps 1:1 */
68 reads_dest = util_logicop_reads_dest(cso->logicop_func);
69 }
70
71 so = CALLOC_STRUCT(fd5_blend_stateobj);
72 if (!so)
73 return NULL;
74
75 so->base = *cso;
76
77 so->lrz_write = true; /* unless blend enabled for any MRT */
78
79 for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
80 const struct pipe_rt_blend_state *rt;
81
82 if (cso->independent_blend_enable)
83 rt = &cso->rt[i];
84 else
85 rt = &cso->rt[0];
86
87 so->rb_mrt[i].blend_control =
88 A5XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
89 A5XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
90 A5XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor)) |
91 A5XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
92 A5XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(blend_func(rt->alpha_func)) |
93 A5XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(fd_blend_factor(rt->alpha_dst_factor));
94
95 so->rb_mrt[i].control =
96 A5XX_RB_MRT_CONTROL_ROP_CODE(rop) |
97 COND(cso->logicop_enable, A5XX_RB_MRT_CONTROL_ROP_ENABLE) |
98 A5XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
99
100 if (rt->blend_enable) {
101 so->rb_mrt[i].control |=
102 // A5XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
103 A5XX_RB_MRT_CONTROL_BLEND |
104 A5XX_RB_MRT_CONTROL_BLEND2;
105 mrt_blend |= (1 << i);
106 so->lrz_write = false;
107 }
108
109 if (reads_dest) {
110 // so->rb_mrt[i].control |= A5XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
111 mrt_blend |= (1 << i);
112 }
113
114 // if (cso->dither)
115 // so->rb_mrt[i].buf_info |= A5XX_RB_MRT_BUF_INFO_DITHER_MODE(DITHER_ALWAYS);
116 }
117
118 so->rb_blend_cntl = A5XX_RB_BLEND_CNTL_ENABLE_BLEND(mrt_blend) |
119 COND(cso->alpha_to_coverage, A5XX_RB_BLEND_CNTL_ALPHA_TO_COVERAGE) |
120 COND(cso->independent_blend_enable, A5XX_RB_BLEND_CNTL_INDEPENDENT_BLEND);
121 so->sp_blend_cntl = A5XX_SP_BLEND_CNTL_UNK8 |
122 COND(cso->alpha_to_coverage, A5XX_SP_BLEND_CNTL_ALPHA_TO_COVERAGE) |
123 COND(mrt_blend, A5XX_SP_BLEND_CNTL_ENABLED);
124
125 return so;
126 }
127