src/gallium/drivers/freedreno/a6xx/fd6_blend.h

   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_state.h"
  32 #include "pipe/p_context.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  */
  42 struct fd6_blend_variant {
  43         unsigned sample_mask;
  44         struct fd_ringbuffer *stateobj;
  45 };
  46
  47 struct fd6_blend_stateobj {
  48         struct pipe_blend_state base;
  49
  50         struct fd_context *ctx;
  51         bool reads_dest;
  52         struct util_dynarray variants;
  53 };
  54
  55 static inline struct fd6_blend_stateobj *
  56 fd6_blend_stateobj(struct pipe_blend_state *blend)
  57 {
  58         return (struct fd6_blend_stateobj *)blend;
  59 }
  60
  61 struct fd6_blend_variant * __fd6_setup_blend_variant(
  62                 struct fd6_blend_stateobj *blend, unsigned sample_mask);
  63
  64 static inline struct fd6_blend_variant *
  65 fd6_blend_variant(struct pipe_blend_state *cso,
  66                 unsigned nr_samples, unsigned sample_mask)
  67 {
  68         struct fd6_blend_stateobj *blend = fd6_blend_stateobj(cso);
  69         unsigned mask = BITFIELD_MASK(nr_samples);
  70
  71         util_dynarray_foreach(&blend->variants, struct fd6_blend_variant *, vp) {
  72                 struct fd6_blend_variant *v = *vp;
  73
  74                 /* mask out sample-mask bits that we don't care about to avoid
  75                  * creating unnecessary variants
  76                  */
  77                 if ((mask & v->sample_mask) == (mask & sample_mask)) {
  78                         return v;
  79                 }
  80         }
  81
  82         return __fd6_setup_blend_variant(blend, sample_mask);
  83 }
  84
  85 void * fd6_blend_state_create(struct pipe_context *pctx,
  86                 const struct pipe_blend_state *cso);
  87 void fd6_blend_state_delete(struct pipe_context *, void *hwcso);
  88
  89 #endif /* FD6_BLEND_H_ */