1 /*
2 * Copyright (C) 2014 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 "fd4_blend.h"
33 #include "fd4_context.h"
34 #include "fd4_format.h"
35
36 static enum a3xx_rb_blend_opcode
blend_func(unsigned func)37 blend_func(unsigned func)
38 {
39 switch (func) {
40 case PIPE_BLEND_ADD:
41 return BLEND_DST_PLUS_SRC;
42 case PIPE_BLEND_MIN:
43 return BLEND_MIN_DST_SRC;
44 case PIPE_BLEND_MAX:
45 return BLEND_MAX_DST_SRC;
46 case PIPE_BLEND_SUBTRACT:
47 return BLEND_SRC_MINUS_DST;
48 case PIPE_BLEND_REVERSE_SUBTRACT:
49 return BLEND_DST_MINUS_SRC;
50 default:
51 DBG("invalid blend func: %x", func);
52 return 0;
53 }
54 }
55
56 void *
fd4_blend_state_create(struct pipe_context * pctx,const struct pipe_blend_state * cso)57 fd4_blend_state_create(struct pipe_context *pctx,
58 const struct pipe_blend_state *cso)
59 {
60 struct fd4_blend_stateobj *so;
61 enum a3xx_rop_code rop = ROP_COPY;
62 bool reads_dest = false;
63 unsigned i, mrt_blend = 0;
64
65 if (cso->logicop_enable) {
66 rop = cso->logicop_func; /* maps 1:1 */
67 reads_dest = util_logicop_reads_dest(cso->logicop_func);
68 }
69
70 so = CALLOC_STRUCT(fd4_blend_stateobj);
71 if (!so)
72 return NULL;
73
74 so->base = *cso;
75
76 for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
77 const struct pipe_rt_blend_state *rt;
78
79 if (cso->independent_blend_enable)
80 rt = &cso->rt[i];
81 else
82 rt = &cso->rt[0];
83
84 so->rb_mrt[i].blend_control =
85 A4XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
86 A4XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
87 A4XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor)) |
88 A4XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
89 A4XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(blend_func(rt->alpha_func)) |
90 A4XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(fd_blend_factor(rt->alpha_dst_factor));
91
92 so->rb_mrt[i].control =
93 A4XX_RB_MRT_CONTROL_ROP_CODE(rop) |
94 COND(cso->logicop_enable, A4XX_RB_MRT_CONTROL_ROP_ENABLE) |
95 A4XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
96
97 if (rt->blend_enable) {
98 so->rb_mrt[i].control |=
99 A4XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
100 A4XX_RB_MRT_CONTROL_BLEND |
101 A4XX_RB_MRT_CONTROL_BLEND2;
102 mrt_blend |= (1 << i);
103 }
104
105 if (reads_dest) {
106 so->rb_mrt[i].control |= A4XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
107 mrt_blend |= (1 << i);
108 }
109
110 if (cso->dither)
111 so->rb_mrt[i].buf_info |= A4XX_RB_MRT_BUF_INFO_DITHER_MODE(DITHER_ALWAYS);
112 }
113
114 so->rb_fs_output = A4XX_RB_FS_OUTPUT_ENABLE_BLEND(mrt_blend) |
115 COND(cso->independent_blend_enable, A4XX_RB_FS_OUTPUT_INDEPENDENT_BLEND);
116
117 return so;
118 }
119