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

   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 #include "pipe/p_state.h"
  29 #include "util/u_blend.h"
  30 #include "util/u_string.h"
  31 #include "util/u_memory.h"
  32
  33 #include "fd6_blend.h"
  34 #include "fd6_context.h"
  35 #include "fd6_format.h"
  36
  37 // XXX move somewhere common.. same across a3xx/a4xx/a5xx..
  38 static enum a3xx_rb_blend_opcode
  39 blend_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
  58 void *
  59 fd6_blend_state_create(struct pipe_context *pctx,
  60                 const struct pipe_blend_state *cso)
  61 {
  62         struct fd6_blend_stateobj *so;
  63         enum a3xx_rop_code rop = ROP_COPY;
  64         bool reads_dest = false;
  65         unsigned i, mrt_blend = 0;
  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(fd6_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
  97                 if (cso->independent_blend_enable)
  98                         rt = &cso->rt[i];
  99                 else
 100                         rt = &cso->rt[0];
 101
 102                 so->rb_mrt[i].blend_control_rgb =
 103                                 A6XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
 104                                 A6XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
 105                                 A6XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor));
 106
 107                 so->rb_mrt[i].blend_control_alpha =
 108                                 A6XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
 109                                 A6XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(blend_func(rt->alpha_func)) |
 110                                 A6XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(fd_blend_factor(rt->alpha_dst_factor));
 111
 112                 so->rb_mrt[i].blend_control_no_alpha_rgb =
 113                                 A6XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_src_factor))) |
 114                                 A6XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
 115                                 A6XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_dst_factor)));
 116
 117
 118                 so->rb_mrt[i].control =
 119                                 A6XX_RB_MRT_CONTROL_ROP_CODE(rop) |
 120                                 COND(cso->logicop_enable, A6XX_RB_MRT_CONTROL_ROP_ENABLE) |
 121                                 A6XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
 122
 123                 if (rt->blend_enable) {
 124                         so->rb_mrt[i].control |=
 125 //                                      A6XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
 126                                         A6XX_RB_MRT_CONTROL_BLEND |
 127                                         A6XX_RB_MRT_CONTROL_BLEND2;
 128                         mrt_blend |= (1 << i);
 129                 }
 130
 131                 if (reads_dest) {
 132 //                      so->rb_mrt[i].control |= A6XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
 133                         mrt_blend |= (1 << i);
 134                 }
 135         }
 136
 137         if (cso->dither) {
 138                 so->rb_dither_cntl = A6XX_RB_DITHER_CNTL_DITHER_MODE_MRT0(DITHER_ALWAYS) |
 139                                 A6XX_RB_DITHER_CNTL_DITHER_MODE_MRT1(DITHER_ALWAYS) |
 140                                 A6XX_RB_DITHER_CNTL_DITHER_MODE_MRT2(DITHER_ALWAYS) |
 141                                 A6XX_RB_DITHER_CNTL_DITHER_MODE_MRT3(DITHER_ALWAYS) |
 142                                 A6XX_RB_DITHER_CNTL_DITHER_MODE_MRT4(DITHER_ALWAYS) |
 143                                 A6XX_RB_DITHER_CNTL_DITHER_MODE_MRT5(DITHER_ALWAYS) |
 144                                 A6XX_RB_DITHER_CNTL_DITHER_MODE_MRT6(DITHER_ALWAYS) |
 145                                 A6XX_RB_DITHER_CNTL_DITHER_MODE_MRT7(DITHER_ALWAYS);
 146         }
 147
 148         so->rb_blend_cntl = A6XX_RB_BLEND_CNTL_ENABLE_BLEND(mrt_blend) |
 149                 COND(cso->alpha_to_coverage, A6XX_RB_BLEND_CNTL_ALPHA_TO_COVERAGE) |
 150                 COND(cso->independent_blend_enable, A6XX_RB_BLEND_CNTL_INDEPENDENT_BLEND);
 151         so->sp_blend_cntl = A6XX_SP_BLEND_CNTL_UNK8 |
 152                 COND(cso->alpha_to_coverage, A6XX_SP_BLEND_CNTL_ALPHA_TO_COVERAGE) |
 153                 COND(mrt_blend, A6XX_SP_BLEND_CNTL_ENABLED);
 154
 155         return so;
 156 }