src/gallium/drivers/freedreno/freedreno_blend.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2012 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 "freedreno_blend.h"
  34 #include "freedreno_context.h"
  35 #include "freedreno_util.h"
  36
  37 static enum rb_blend_op
  38 blend_factor(unsigned factor)
  39 {
  40         switch (factor) {
  41         case PIPE_BLENDFACTOR_ONE:
  42                 return RB_BLEND_ONE;
  43         case PIPE_BLENDFACTOR_SRC_COLOR:
  44                 return RB_BLEND_SRC_COLOR;
  45         case PIPE_BLENDFACTOR_SRC_ALPHA:
  46                 return RB_BLEND_SRC_ALPHA;
  47         case PIPE_BLENDFACTOR_DST_ALPHA:
  48                 return RB_BLEND_DST_ALPHA;
  49         case PIPE_BLENDFACTOR_DST_COLOR:
  50                 return RB_BLEND_DST_COLOR;
  51         case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE:
  52                 return RB_BLEND_SRC_ALPHA_SATURATE;
  53         case PIPE_BLENDFACTOR_CONST_COLOR:
  54                 return RB_BLEND_CONSTANT_COLOR;
  55         case PIPE_BLENDFACTOR_CONST_ALPHA:
  56                 return RB_BLEND_CONSTANT_ALPHA;
  57         case PIPE_BLENDFACTOR_ZERO:
  58         case 0:
  59                 return RB_BLEND_ZERO;
  60         case PIPE_BLENDFACTOR_INV_SRC_COLOR:
  61                 return RB_BLEND_ONE_MINUS_SRC_COLOR;
  62         case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
  63                 return RB_BLEND_ONE_MINUS_SRC_ALPHA;
  64         case PIPE_BLENDFACTOR_INV_DST_ALPHA:
  65                 return RB_BLEND_ONE_MINUS_DST_ALPHA;
  66         case PIPE_BLENDFACTOR_INV_DST_COLOR:
  67                 return RB_BLEND_ONE_MINUS_DST_COLOR;
  68         case PIPE_BLENDFACTOR_INV_CONST_COLOR:
  69                 return RB_BLEND_ONE_MINUS_CONSTANT_COLOR;
  70         case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
  71                 return RB_BLEND_ONE_MINUS_CONSTANT_ALPHA;
  72         case PIPE_BLENDFACTOR_INV_SRC1_COLOR:
  73         case PIPE_BLENDFACTOR_INV_SRC1_ALPHA:
  74         case PIPE_BLENDFACTOR_SRC1_COLOR:
  75         case PIPE_BLENDFACTOR_SRC1_ALPHA:
  76                 /* I don't think these are supported */
  77         default:
  78                 DBG("invalid blend factor: %x", factor);
  79                 return 0;
  80         }
  81 }
  82
  83 static enum rb_comb_func
  84 blend_func(unsigned func)
  85 {
  86         switch (func) {
  87         case PIPE_BLEND_ADD:
  88                 return COMB_DST_PLUS_SRC;
  89         case PIPE_BLEND_MIN:
  90                 return COMB_MIN_DST_SRC;
  91         case PIPE_BLEND_MAX:
  92                 return COMB_MAX_DST_SRC;
  93         case PIPE_BLEND_SUBTRACT:
  94                 return COMB_SRC_MINUS_DST;
  95         case PIPE_BLEND_REVERSE_SUBTRACT:
  96                 return COMB_DST_MINUS_SRC;
  97         default:
  98                 DBG("invalid blend func: %x", func);
  99                 return 0;
 100         }
 101 }
 102
 103 static void *
 104 fd_blend_state_create(struct pipe_context *pctx,
 105                 const struct pipe_blend_state *cso)
 106 {
 107         const struct pipe_rt_blend_state *rt = &cso->rt[0];
 108         struct fd_blend_stateobj *so;
 109
 110         if (cso->logicop_enable) {
 111                 DBG("Unsupported! logicop");
 112                 return NULL;
 113         }
 114
 115         if (cso->independent_blend_enable) {
 116                 DBG("Unsupported! independent blend state");
 117                 return NULL;
 118         }
 119
 120         so = CALLOC_STRUCT(fd_blend_stateobj);
 121         if (!so)
 122                 return NULL;
 123
 124         so->base = *cso;
 125
 126         so->rb_colorcontrol = RB_COLORCONTROL_ROP_CODE(12);
 127
 128         so->rb_blendcontrol =
 129                 RB_BLENDCONTROL_COLOR_SRCBLEND(blend_factor(rt->rgb_src_factor)) |
 130                 RB_BLENDCONTROL_COLOR_COMB_FCN(blend_func(rt->rgb_func)) |
 131                 RB_BLENDCONTROL_COLOR_DESTBLEND(blend_factor(rt->rgb_dst_factor)) |
 132                 RB_BLENDCONTROL_ALPHA_SRCBLEND(blend_factor(rt->alpha_src_factor)) |
 133                 RB_BLENDCONTROL_ALPHA_COMB_FCN(blend_func(rt->alpha_func)) |
 134                 RB_BLENDCONTROL_ALPHA_DESTBLEND(blend_factor(rt->alpha_dst_factor));
 135
 136         if (rt->colormask & PIPE_MASK_R)
 137                 so->rb_colormask |= RB_COLOR_MASK_WRITE_RED;
 138         if (rt->colormask & PIPE_MASK_G)
 139                 so->rb_colormask |= RB_COLOR_MASK_WRITE_GREEN;
 140         if (rt->colormask & PIPE_MASK_B)
 141                 so->rb_colormask |= RB_COLOR_MASK_WRITE_BLUE;
 142         if (rt->colormask & PIPE_MASK_A)
 143                 so->rb_colormask |= RB_COLOR_MASK_WRITE_ALPHA;
 144
 145         if (!rt->blend_enable)
 146                 so->rb_colorcontrol |= RB_COLORCONTROL_BLEND_DISABLE;
 147
 148         if (cso->dither)
 149                 so->rb_colorcontrol |= RB_COLORCONTROL_DITHER_MODE(DITHER_ALWAYS);
 150
 151         return so;
 152 }
 153
 154 static void
 155 fd_blend_state_bind(struct pipe_context *pctx, void *hwcso)
 156 {
 157         struct fd_context *ctx = fd_context(pctx);
 158         ctx->blend = hwcso;
 159         ctx->dirty |= FD_DIRTY_BLEND;
 160 }
 161
 162 static void
 163 fd_blend_state_delete(struct pipe_context *pctx, void *hwcso)
 164 {
 165         FREE(hwcso);
 166 }
 167
 168 void
 169 fd_blend_init(struct pipe_context *pctx)
 170 {
 171         pctx->create_blend_state = fd_blend_state_create;
 172         pctx->bind_blend_state = fd_blend_state_bind;
 173         pctx->delete_blend_state = fd_blend_state_delete;
 174 }
 175