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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 
69 		switch (cso->logicop_func) {
70 		case PIPE_LOGICOP_NOR:
71 		case PIPE_LOGICOP_AND_INVERTED:
72 		case PIPE_LOGICOP_AND_REVERSE:
73 		case PIPE_LOGICOP_INVERT:
74 		case PIPE_LOGICOP_XOR:
75 		case PIPE_LOGICOP_NAND:
76 		case PIPE_LOGICOP_AND:
77 		case PIPE_LOGICOP_EQUIV:
78 		case PIPE_LOGICOP_NOOP:
79 		case PIPE_LOGICOP_OR_INVERTED:
80 		case PIPE_LOGICOP_OR_REVERSE:
81 		case PIPE_LOGICOP_OR:
82 			reads_dest = true;
83 			break;
84 		}
85 	}
86 
87 	so = CALLOC_STRUCT(fd5_blend_stateobj);
88 	if (!so)
89 		return NULL;
90 
91 	so->base = *cso;
92 
93 	so->lrz_write = true;  /* unless blend enabled for any MRT */
94 
95 	for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
96 		const struct pipe_rt_blend_state *rt;
97 
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 				A5XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
105 				A5XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
106 				A5XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor));
107 
108 		so->rb_mrt[i].blend_control_alpha =
109 				A5XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
110 				A5XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(blend_func(rt->alpha_func)) |
111 				A5XX_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 				A5XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_src_factor))) |
115 				A5XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
116 				A5XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_dst_factor)));
117 
118 
119 		so->rb_mrt[i].control =
120 				A5XX_RB_MRT_CONTROL_ROP_CODE(rop) |
121 				COND(cso->logicop_enable, A5XX_RB_MRT_CONTROL_ROP_ENABLE) |
122 				A5XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
123 
124 		if (rt->blend_enable) {
125 			so->rb_mrt[i].control |=
126 //					A5XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
127 					A5XX_RB_MRT_CONTROL_BLEND |
128 					A5XX_RB_MRT_CONTROL_BLEND2;
129 			mrt_blend |= (1 << i);
130 			so->lrz_write = false;
131 		}
132 
133 		if (reads_dest) {
134 //			so->rb_mrt[i].control |= A5XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
135 			mrt_blend |= (1 << i);
136 		}
137 
138 //		if (cso->dither)
139 //			so->rb_mrt[i].buf_info |= A5XX_RB_MRT_BUF_INFO_DITHER_MODE(DITHER_ALWAYS);
140 	}
141 
142 	so->rb_blend_cntl = A5XX_RB_BLEND_CNTL_ENABLE_BLEND(mrt_blend) |
143 		COND(cso->independent_blend_enable, A5XX_RB_BLEND_CNTL_INDEPENDENT_BLEND);
144 	so->sp_blend_cntl = A5XX_SP_BLEND_CNTL_UNK8 |
145 		COND(mrt_blend, A5XX_SP_BLEND_CNTL_ENABLED);
146 
147 	return so;
148 }
149