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  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_blend.h"
  31. #include "util/u_string.h"
  32. #include "util/u_memory.h"
  33.  
  34. #include "fd3_blend.h"
  35. #include "fd3_context.h"
  36. #include "fd3_format.h"
  37.  
  38.  
  39. static enum a3xx_rb_blend_opcode
  40. blend_func(unsigned func)
  41. {
  42.         switch (func) {
  43.         case PIPE_BLEND_ADD:
  44.                 return BLEND_DST_PLUS_SRC;
  45.         case PIPE_BLEND_MIN:
  46.                 return BLEND_MIN_DST_SRC;
  47.         case PIPE_BLEND_MAX:
  48.                 return BLEND_MAX_DST_SRC;
  49.         case PIPE_BLEND_SUBTRACT:
  50.                 return BLEND_SRC_MINUS_DST;
  51.         case PIPE_BLEND_REVERSE_SUBTRACT:
  52.                 return BLEND_DST_MINUS_SRC;
  53.         default:
  54.                 DBG("invalid blend func: %x", func);
  55.                 return 0;
  56.         }
  57. }
  58.  
  59. void *
  60. fd3_blend_state_create(struct pipe_context *pctx,
  61.                 const struct pipe_blend_state *cso)
  62. {
  63.         struct fd3_blend_stateobj *so;
  64.         enum a3xx_rop_code rop = ROP_COPY;
  65.         bool reads_dest = false;
  66.         int i;
  67.  
  68.         if (cso->logicop_enable) {
  69.                 rop = cso->logicop_func;  /* maps 1:1 */
  70.  
  71.                 switch (cso->logicop_func) {
  72.                 case PIPE_LOGICOP_NOR:
  73.                 case PIPE_LOGICOP_AND_INVERTED:
  74.                 case PIPE_LOGICOP_AND_REVERSE:
  75.                 case PIPE_LOGICOP_INVERT:
  76.                 case PIPE_LOGICOP_XOR:
  77.                 case PIPE_LOGICOP_NAND:
  78.                 case PIPE_LOGICOP_AND:
  79.                 case PIPE_LOGICOP_EQUIV:
  80.                 case PIPE_LOGICOP_NOOP:
  81.                 case PIPE_LOGICOP_OR_INVERTED:
  82.                 case PIPE_LOGICOP_OR_REVERSE:
  83.                 case PIPE_LOGICOP_OR:
  84.                         reads_dest = true;
  85.                         break;
  86.                 }
  87.         }
  88.  
  89.         so = CALLOC_STRUCT(fd3_blend_stateobj);
  90.         if (!so)
  91.                 return NULL;
  92.  
  93.         so->base = *cso;
  94.  
  95.         for (i = 0; i < ARRAY_SIZE(so->rb_mrt); i++) {
  96.                 const struct pipe_rt_blend_state *rt;
  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.                                 A3XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(rt->rgb_src_factor)) |
  104.                                 A3XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
  105.                                 A3XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(rt->rgb_dst_factor));
  106.  
  107.                 so->rb_mrt[i].blend_control_alpha =
  108.                                 A3XX_RB_MRT_BLEND_CONTROL_ALPHA_SRC_FACTOR(fd_blend_factor(rt->alpha_src_factor)) |
  109.                                 A3XX_RB_MRT_BLEND_CONTROL_ALPHA_BLEND_OPCODE(blend_func(rt->alpha_func)) |
  110.                                 A3XX_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.                                 A3XX_RB_MRT_BLEND_CONTROL_RGB_SRC_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_src_factor))) |
  114.                                 A3XX_RB_MRT_BLEND_CONTROL_RGB_BLEND_OPCODE(blend_func(rt->rgb_func)) |
  115.                                 A3XX_RB_MRT_BLEND_CONTROL_RGB_DEST_FACTOR(fd_blend_factor(util_blend_dst_alpha_to_one(rt->rgb_dst_factor)));
  116.  
  117.                 so->rb_mrt[i].control =
  118.                                 A3XX_RB_MRT_CONTROL_ROP_CODE(rop) |
  119.                                 A3XX_RB_MRT_CONTROL_COMPONENT_ENABLE(rt->colormask);
  120.  
  121.                 if (rt->blend_enable)
  122.                         so->rb_mrt[i].control |=
  123.                                         A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE |
  124.                                         A3XX_RB_MRT_CONTROL_BLEND |
  125.                                         A3XX_RB_MRT_CONTROL_BLEND2;
  126.  
  127.                 if (reads_dest)
  128.                         so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_READ_DEST_ENABLE;
  129.  
  130.                 if (cso->dither)
  131.                         so->rb_mrt[i].control |= A3XX_RB_MRT_CONTROL_DITHER_MODE(DITHER_ALWAYS);
  132.         }
  133.  
  134.         return so;
  135. }
  136.