1 /*
2 * Copyright (C) 2013 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_dual_blend.h"
30 #include "util/u_memory.h"
31 #include "util/u_string.h"
32
33 #include "fd3_blend.h"
34 #include "fd3_context.h"
35 #include "fd3_format.h"
36
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 *
fd3_blend_state_create(struct pipe_context * pctx,const struct pipe_blend_state * cso)58 fd3_blend_state_create(struct pipe_context *pctx,
59 const struct pipe_blend_state *cso)
60 {
61 struct fd3_blend_stateobj *so;
62 enum a3xx_rop_code rop = ROP_COPY;
63 bool reads_dest = false;
64 int i;
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(fd3_blend_stateobj);
72 if (!so)
73 return NULL;
74
75 so->base = *cso;
76
77 for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
78 const struct pipe_rt_blend_state *rt;
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 A3XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(
86 fd_blend_factor(rt->rgb_src_factor)) |
87 A3XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
88 A3XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(
89 fd_blend_factor(rt->rgb_dst_factor)) |
90 A3XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(
91 fd_blend_factor(rt->alpha_src_factor)) |
92 A3XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(
93 blend_func(rt->alpha_func)) |
94 A3XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(
95 fd_blend_factor(rt->alpha_dst_factor));
96
97 so->rb_mrt[i].control =
98 A3XX_RB_MRT_CONTROL_ROP_CODE(rop) |
99 A3XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
100
101 if (rt->blend_enable)
102 so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
103 A3XX_RB_MRT_CONTROL_BLEND |
104 A3XX_RB_MRT_CONTROL_BLEND2;
105
106 if (reads_dest)
107 so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
108
109 if (cso->dither)
110 so->rb_mrt[i].control |=
111 A3XX_RB_MRT_CONTROL_DITHER_MODE(DITHER_ALWAYS);
112 }
113
114 if (cso->rt[0].blend_enable && util_blend_state_is_dual(cso, 0))
115 so->rb_render_control = A3XX_RB_RENDER_CONTROL_DUAL_COLOR_IN_ENABLE;
116
117 return so;
118 }
119