1/*
2 * Copyright (C) 2016 Rob Clark <robclark@freedesktop.org>
3 * Copyright © 2018 Google, Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 * Authors:
25 *    Rob Clark <robclark@freedesktop.org>
26 */
27
28#ifndef FD6_BLEND_H_
29#define FD6_BLEND_H_
30
31#include "pipe/p_context.h"
32#include "pipe/p_state.h"
33
34#include "freedreno_context.h"
35#include "freedreno_util.h"
36
37/**
38 * Since the sample-mask is part of the hw blend state, we need to have state
39 * variants per sample-mask value.  But we don't expect the sample-mask state
40 * to change frequently.
41 */
42struct fd6_blend_variant {
43   unsigned sample_mask;
44   struct fd_ringbuffer *stateobj;
45};
46
47struct fd6_blend_stateobj {
48   struct pipe_blend_state base;
49
50   bool use_dual_src_blend;
51
52   struct fd_context *ctx;
53   bool reads_dest;
54   struct util_dynarray variants;
55};
56
57static inline struct fd6_blend_stateobj *
58fd6_blend_stateobj(struct pipe_blend_state *blend)
59{
60   return (struct fd6_blend_stateobj *)blend;
61}
62
63struct fd6_blend_variant *
64__fd6_setup_blend_variant(struct fd6_blend_stateobj *blend,
65                          unsigned sample_mask);
66
67static inline struct fd6_blend_variant *
68fd6_blend_variant(struct pipe_blend_state *cso, unsigned nr_samples,
69                  unsigned sample_mask)
70{
71   struct fd6_blend_stateobj *blend = fd6_blend_stateobj(cso);
72   unsigned mask = BITFIELD_MASK(nr_samples);
73
74   util_dynarray_foreach (&blend->variants, struct fd6_blend_variant *, vp) {
75      struct fd6_blend_variant *v = *vp;
76
77      /* mask out sample-mask bits that we don't care about to avoid
78       * creating unnecessary variants
79       */
80      if ((mask & v->sample_mask) == (mask & sample_mask)) {
81         return v;
82      }
83   }
84
85   return __fd6_setup_blend_variant(blend, sample_mask);
86}
87
88void *fd6_blend_state_create(struct pipe_context *pctx,
89                             const struct pipe_blend_state *cso);
90void fd6_blend_state_delete(struct pipe_context *, void *hwcso);
91
92#endif /* FD6_BLEND_H_ */
93