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_string.h"
31#include "util/u_memory.h"
32
33#include "fd3_blend.h"
34#include "fd3_context.h"
35#include "fd3_format.h"
36
37
38static enum a3xx_rb_blend_opcode
39blend_func(unsigned func)
40{
41	switch (func) {
42	case PIPE_BLEND_ADD:
43		return BLEND_DST_PLUS_SRC;
44	case PIPE_BLEND_MIN:
45		return BLEND_MIN_DST_SRC;
46	case PIPE_BLEND_MAX:
47		return BLEND_MAX_DST_SRC;
48	case PIPE_BLEND_SUBTRACT:
49		return BLEND_SRC_MINUS_DST;
50	case PIPE_BLEND_REVERSE_SUBTRACT:
51		return BLEND_DST_MINUS_SRC;
52	default:
53		DBG("invalid blend func: %x", func);
54		return 0;
55	}
56}
57
58void *
59fd3_blend_state_create(struct pipe_context *pctx,
60		const struct pipe_blend_state *cso)
61{
62	struct fd3_blend_stateobj *so;
63	enum a3xx_rop_code rop = ROP_COPY;
64	bool reads_dest = false;
65	int i;
66
67	if (cso->logicop_enable) {
68		rop = cso->logicop_func;  /* maps 1:1 */
69
70		switch (cso->logicop_func) {
71		case PIPE_LOGICOP_NOR:
72		case PIPE_LOGICOP_AND_INVERTED:
73		case PIPE_LOGICOP_AND_REVERSE:
74		case PIPE_LOGICOP_INVERT:
75		case PIPE_LOGICOP_XOR:
76		case PIPE_LOGICOP_NAND:
77		case PIPE_LOGICOP_AND:
78		case PIPE_LOGICOP_EQUIV:
79		case PIPE_LOGICOP_NOOP:
80		case PIPE_LOGICOP_OR_INVERTED:
81		case PIPE_LOGICOP_OR_REVERSE:
82		case PIPE_LOGICOP_OR:
83			reads_dest = true;
84			break;
85		}
86	}
87
88	so = CALLOC_STRUCT(fd3_blend_stateobj);
89	if (!so)
90		return NULL;
91
92	so->base = *cso;
93
94	for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
95		const struct pipe_rt_blend_state *rt;
96		if (cso->independent_blend_enable)
97			rt = &cso->rt[i];
98		else
99			rt = &cso->rt[0];
100
101		so->rb_mrt[i].blend_control_rgb =
102				A3XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
103				A3XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
104				A3XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor));
105
106		so->rb_mrt[i].blend_control_alpha =
107				A3XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
108				A3XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(blend_func(rt->alpha_func)) |
109				A3XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(fd_blend_factor(rt->alpha_dst_factor));
110
111		so->rb_mrt[i].blend_control_no_alpha_rgb =
112				A3XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_src_factor))) |
113				A3XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
114				A3XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_dst_factor)));
115
116		so->rb_mrt[i].control =
117				A3XX_RB_MRT_CONTROL_ROP_CODE(rop) |
118				A3XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
119
120		if (rt->blend_enable)
121			so->rb_mrt[i].control |=
122					A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
123					A3XX_RB_MRT_CONTROL_BLEND |
124					A3XX_RB_MRT_CONTROL_BLEND2;
125
126		if (reads_dest)
127			so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
128
129		if (cso->dither)
130			so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_DITHER_MODE(DITHER_ALWAYS);
131	}
132
133	if (cso->rt[0].blend_enable && util_blend_state_is_dual(cso, 0))
134		so->rb_render_control = A3XX_RB_RENDER_CONTROL_DUAL_COLOR_IN_ENABLE;
135
136	return so;
137}
138