src/gallium/drivers/freedreno/a2xx/fd2_blend.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2012-2013 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 "fd2_blend.h"
  34 #include "fd2_context.h"
  35 #include "fd2_util.h"
  36
  37 void *
  38 fd2_blend_state_create(struct pipe_context *pctx,
  39                 const struct pipe_blend_state *cso)
  40 {
  41         const struct pipe_rt_blend_state *rt = &cso->rt[0];
  42         struct fd2_blend_stateobj *so;
  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(fd2_blend_stateobj);
  55         if (!so)
  56                 return NULL;
  57
  58         so->base = *cso;
  59
  60         so->rb_colorcontrol = A2XX_RB_COLORCONTROL_ROP_CODE(12);
  61
  62         so->rb_blendcontrol =
  63                 A2XX_RB_BLEND_CONTROL_COLOR_SRCBLEND(fd_blend_factor(rt->rgb_src_factor)) |
  64                 A2XX_RB_BLEND_CONTROL_COLOR_COMB_FCN(fd_blend_func(rt->rgb_func)) |
  65                 A2XX_RB_BLEND_CONTROL_COLOR_DESTBLEND(fd_blend_factor(rt->rgb_dst_factor)) |
  66                 A2XX_RB_BLEND_CONTROL_ALPHA_SRCBLEND(fd_blend_factor(rt->alpha_src_factor)) |
  67                 A2XX_RB_BLEND_CONTROL_ALPHA_COMB_FCN(fd_blend_func(rt->alpha_func)) |
  68                 A2XX_RB_BLEND_CONTROL_ALPHA_DESTBLEND(fd_blend_factor(rt->alpha_dst_factor));
  69
  70         if (rt->colormask & PIPE_MASK_R)
  71                 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_RED;
  72         if (rt->colormask & PIPE_MASK_G)
  73                 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_GREEN;
  74         if (rt->colormask & PIPE_MASK_B)
  75                 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_BLUE;
  76         if (rt->colormask & PIPE_MASK_A)
  77                 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_ALPHA;
  78
  79         if (!rt->blend_enable)
  80                 so->rb_colorcontrol |= A2XX_RB_COLORCONTROL_BLEND_DISABLE;
  81
  82         if (cso->dither)
  83                 so->rb_colorcontrol |= A2XX_RB_COLORCONTROL_DITHER_MODE(DITHER_ALWAYS);
  84
  85         return so;
  86 }