src/gallium/drivers/freedreno/a3xx/fd3_blend.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 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 "fd3_blend.h"
  34 #include "fd3_context.h"
  35 #include "fd3_util.h"
  36
  37 void *
  38 fd3_blend_state_create(struct pipe_context *pctx,
  39                 const struct pipe_blend_state *cso)
  40 {
  41         struct fd3_blend_stateobj *so;
  42         int i;
  43
  44         if (cso->logicop_enable) {
  45                 DBG("Unsupported! logicop");
  46                 return NULL;
  47         }
  48
  49         if (cso->independent_blend_enable) {
  50                 DBG("Unsupported! independent blend state");
  51                 return NULL;
  52         }
  53
  54         so = CALLOC_STRUCT(fd3_blend_stateobj);
  55         if (!so)
  56                 return NULL;
  57
  58         so->base = *cso;
  59
  60         for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
  61                 const struct pipe_rt_blend_state *rt = &cso->rt[i];
  62
  63                 so->rb_mrt[i].blend_control =
  64                                 A3XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
  65                                 A3XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(fd_blend_func(rt->rgb_func)) |
  66                                 A3XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor)) |
  67                                 A3XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
  68                                 A3XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(fd_blend_func(rt->alpha_func)) |
  69                                 A3XX_RB_MRT_BLEND_CONTROL_ALPHA_DEST_FACTOR(fd_blend_factor(rt->alpha_dst_factor)) |
  70                                 A3XX_RB_MRT_BLEND_CONTROL_CLAMP_ENABLE;
  71
  72                 so->rb_mrt[i].control =
  73                                 A3XX_RB_MRT_CONTROL_ROP_CODE(12) |
  74                                 A3XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
  75
  76                 if (rt->blend_enable)
  77                         so->rb_mrt[i].control |=
  78                                         A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
  79                                         A3XX_RB_MRT_CONTROL_BLEND |
  80                                         A3XX_RB_MRT_CONTROL_BLEND2;
  81
  82                 if (cso->dither)
  83                         so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_DITHER_MODE(DITHER_ALWAYS);
  84         }
  85
  86         return so;
  87 }