1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
2
3 /*
4 * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Authors:
26 * Rob Clark <robclark@freedesktop.org>
27 */
28
29 #include "pipe/p_state.h"
30 #include "util/u_blend.h"
31 #include "util/u_dual_blend.h"
32 #include "util/u_string.h"
33 #include "util/u_memory.h"
34
35 #include "fd3_blend.h"
36 #include "fd3_context.h"
37 #include "fd3_format.h"
38
39
40 static enum a3xx_rb_blend_opcode
blend_func(unsigned func)41 blend_func(unsigned func)
42 {
43 switch (func) {
44 case PIPE_BLEND_ADD:
45 return BLEND_DST_PLUS_SRC;
46 case PIPE_BLEND_MIN:
47 return BLEND_MIN_DST_SRC;
48 case PIPE_BLEND_MAX:
49 return BLEND_MAX_DST_SRC;
50 case PIPE_BLEND_SUBTRACT:
51 return BLEND_SRC_MINUS_DST;
52 case PIPE_BLEND_REVERSE_SUBTRACT:
53 return BLEND_DST_MINUS_SRC;
54 default:
55 DBG("invalid blend func: %x", func);
56 return 0;
57 }
58 }
59
60 void *
fd3_blend_state_create(struct pipe_context * pctx,const struct pipe_blend_state * cso)61 fd3_blend_state_create(struct pipe_context *pctx,
62 const struct pipe_blend_state *cso)
63 {
64 struct fd3_blend_stateobj *so;
65 enum a3xx_rop_code rop = ROP_COPY;
66 bool reads_dest = false;
67 int i;
68
69 if (cso->logicop_enable) {
70 rop = cso->logicop_func; /* maps 1:1 */
71
72 switch (cso->logicop_func) {
73 case PIPE_LOGICOP_NOR:
74 case PIPE_LOGICOP_AND_INVERTED:
75 case PIPE_LOGICOP_AND_REVERSE:
76 case PIPE_LOGICOP_INVERT:
77 case PIPE_LOGICOP_XOR:
78 case PIPE_LOGICOP_NAND:
79 case PIPE_LOGICOP_AND:
80 case PIPE_LOGICOP_EQUIV:
81 case PIPE_LOGICOP_NOOP:
82 case PIPE_LOGICOP_OR_INVERTED:
83 case PIPE_LOGICOP_OR_REVERSE:
84 case PIPE_LOGICOP_OR:
85 reads_dest = true;
86 break;
87 }
88 }
89
90 so = CALLOC_STRUCT(fd3_blend_stateobj);
91 if (!so)
92 return NULL;
93
94 so->base = *cso;
95
96 for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
97 const struct pipe_rt_blend_state *rt;
98 if (cso->independent_blend_enable)
99 rt = &cso->rt[i];
100 else
101 rt = &cso->rt[0];
102
103 so->rb_mrt[i].blend_control_rgb =
104 A3XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
105 A3XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
106 A3XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor));
107
108 so->rb_mrt[i].blend_control_alpha =
109 A3XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
110 A3XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(blend_func(rt->alpha_func)) |
111 A3XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(fd_blend_factor(rt->alpha_dst_factor));
112
113 so->rb_mrt[i].blend_control_no_alpha_rgb =
114 A3XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_src_factor))) |
115 A3XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
116 A3XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_dst_factor)));
117
118 so->rb_mrt[i].control =
119 A3XX_RB_MRT_CONTROL_ROP_CODE(rop) |
120 A3XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
121
122 if (rt->blend_enable)
123 so->rb_mrt[i].control |=
124 A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
125 A3XX_RB_MRT_CONTROL_BLEND |
126 A3XX_RB_MRT_CONTROL_BLEND2;
127
128 if (reads_dest)
129 so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
130
131 if (cso->dither)
132 so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_DITHER_MODE(DITHER_ALWAYS);
133 }
134
135 if (cso->rt[0].blend_enable && util_blend_state_is_dual(cso, 0))
136 so->rb_render_control = A3XX_RB_RENDER_CONTROL_DUAL_COLOR_IN_ENABLE;
137
138 return so;
139 }
140