src/gallium/drivers/freedreno/a4xx/fd4_blend.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2014 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 "fd4_blend.h"
  34 #include "fd4_context.h"
  35 #include "fd4_format.h"
  36
  37 static enum a4xx_rb_blend_opcode
  38 blend_func(unsigned func)
  39 {
  40         switch (func) {
  41         case PIPE_BLEND_ADD:
  42                 return BLEND_DST_PLUS_SRC;
  43         case PIPE_BLEND_MIN:
  44                 return BLEND_MIN_DST_SRC;
  45         case PIPE_BLEND_MAX:
  46                 return BLEND_MAX_DST_SRC;
  47         case PIPE_BLEND_SUBTRACT:
  48                 return BLEND_SRC_MINUS_DST;
  49         case PIPE_BLEND_REVERSE_SUBTRACT:
  50                 return BLEND_DST_MINUS_SRC;
  51         default:
  52                 DBG("invalid blend func: %x", func);
  53                 return 0;
  54         }
  55 }
  56
  57 void *
  58 fd4_blend_state_create(struct pipe_context *pctx,
  59                 const struct pipe_blend_state *cso)
  60 {
  61         struct fd4_blend_stateobj *so;
  62 //      enum a3xx_rop_code rop = ROP_COPY;
  63         bool reads_dest = false;
  64         unsigned i, mrt_blend = 0;
  65
  66         if (cso->logicop_enable) {
  67 //              rop = cso->logicop_func;  /* maps 1:1 */
  68
  69                 switch (cso->logicop_func) {
  70                 case PIPE_LOGICOP_NOR:
  71                 case PIPE_LOGICOP_AND_INVERTED:
  72                 case PIPE_LOGICOP_AND_REVERSE:
  73                 case PIPE_LOGICOP_INVERT:
  74                 case PIPE_LOGICOP_XOR:
  75                 case PIPE_LOGICOP_NAND:
  76                 case PIPE_LOGICOP_AND:
  77                 case PIPE_LOGICOP_EQUIV:
  78                 case PIPE_LOGICOP_NOOP:
  79                 case PIPE_LOGICOP_OR_INVERTED:
  80                 case PIPE_LOGICOP_OR_REVERSE:
  81                 case PIPE_LOGICOP_OR:
  82                         reads_dest = true;
  83                         break;
  84                 }
  85         }
  86
  87         so = CALLOC_STRUCT(fd4_blend_stateobj);
  88         if (!so)
  89                 return NULL;
  90
  91         so->base = *cso;
  92
  93         for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
  94                 const struct pipe_rt_blend_state *rt;
  95
  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 =
 102                                 A4XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
 103                                 A4XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
 104                                 A4XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor)) |
 105                                 A4XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
 106                                 A4XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(blend_func(rt->alpha_func)) |
 107                                 A4XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(fd_blend_factor(rt->alpha_dst_factor));
 108
 109                 so->rb_mrt[i].control =
 110                                 0xc00 | /* XXX ROP_CODE ?? */
 111                                 A4XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
 112
 113                 if (rt->blend_enable) {
 114                         so->rb_mrt[i].control |=
 115                                         A4XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
 116                                         A4XX_RB_MRT_CONTROL_BLEND |
 117                                         A4XX_RB_MRT_CONTROL_BLEND2;
 118                         mrt_blend |= (1 << i);
 119                 }
 120
 121                 if (reads_dest)
 122                         so->rb_mrt[i].control |= A4XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
 123
 124                 if (cso->dither)
 125                         so->rb_mrt[i].buf_info |= A4XX_RB_MRT_BUF_INFO_DITHER_MODE(DITHER_ALWAYS);
 126         }
 127
 128         so->rb_fs_output = A4XX_RB_FS_OUTPUT_ENABLE_BLEND(mrt_blend);
 129
 130         return so;
 131 }