1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
2
3 /*
4 * Copyright (C) 2012-2013 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_string.h"
31 #include "util/u_memory.h"
32
33 #include "fd2_blend.h"
34 #include "fd2_context.h"
35 #include "fd2_util.h"
36
37
38 static enum a2xx_rb_blend_opcode
blend_func(unsigned func)39 blend_func(unsigned func)
40 {
41 switch (func) {
42 case PIPE_BLEND_ADD:
43 return BLEND2_DST_PLUS_SRC;
44 case PIPE_BLEND_MIN:
45 return BLEND2_MIN_DST_SRC;
46 case PIPE_BLEND_MAX:
47 return BLEND2_MAX_DST_SRC;
48 case PIPE_BLEND_SUBTRACT:
49 return BLEND2_SRC_MINUS_DST;
50 case PIPE_BLEND_REVERSE_SUBTRACT:
51 return BLEND2_DST_MINUS_SRC;
52 default:
53 DBG("invalid blend func: %x", func);
54 return 0;
55 }
56 }
57
58 void *
fd2_blend_state_create(struct pipe_context * pctx,const struct pipe_blend_state * cso)59 fd2_blend_state_create(struct pipe_context *pctx,
60 const struct pipe_blend_state *cso)
61 {
62 const struct pipe_rt_blend_state *rt = &cso->rt[0];
63 struct fd2_blend_stateobj *so;
64
65 if (cso->logicop_enable) {
66 DBG("Unsupported! logicop");
67 return NULL;
68 }
69
70 if (cso->independent_blend_enable) {
71 DBG("Unsupported! independent blend state");
72 return NULL;
73 }
74
75 so = CALLOC_STRUCT(fd2_blend_stateobj);
76 if (!so)
77 return NULL;
78
79 so->base = *cso;
80
81 so->rb_colorcontrol = A2XX_RB_COLORCONTROL_ROP_CODE(12);
82
83 so->rb_blendcontrol =
84 A2XX_RB_BLEND_CONTROL_COLOR_SRCBLEND(fd_blend_factor(rt->rgb_src_factor)) |
85 A2XX_RB_BLEND_CONTROL_COLOR_COMB_FCN(blend_func(rt->rgb_func)) |
86 A2XX_RB_BLEND_CONTROL_COLOR_DESTBLEND(fd_blend_factor(rt->rgb_dst_factor)) |
87 A2XX_RB_BLEND_CONTROL_ALPHA_SRCBLEND(fd_blend_factor(rt->alpha_src_factor)) |
88 A2XX_RB_BLEND_CONTROL_ALPHA_COMB_FCN(blend_func(rt->alpha_func)) |
89 A2XX_RB_BLEND_CONTROL_ALPHA_DESTBLEND(fd_blend_factor(rt->alpha_dst_factor));
90
91 if (rt->colormask & PIPE_MASK_R)
92 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_RED;
93 if (rt->colormask & PIPE_MASK_G)
94 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_GREEN;
95 if (rt->colormask & PIPE_MASK_B)
96 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_BLUE;
97 if (rt->colormask & PIPE_MASK_A)
98 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_ALPHA;
99
100 if (!rt->blend_enable)
101 so->rb_colorcontrol |= A2XX_RB_COLORCONTROL_BLEND_DISABLE;
102
103 if (cso->dither)
104 so->rb_colorcontrol |= A2XX_RB_COLORCONTROL_DITHER_MODE(DITHER_ALWAYS);
105
106 return so;
107 }
108