src/gallium/drivers/freedreno/freedreno_zsa.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
  30 #include "pipe/p_state.h"
  31 #include "util/u_string.h"
  32 #include "util/u_memory.h"
  33
  34 #include "freedreno_zsa.h"
  35 #include "freedreno_context.h"
  36 #include "freedreno_util.h"
  37
  38 static enum adreno_stencil_op
  39 stencil_op(unsigned op)
  40 {
  41         switch (op) {
  42         case PIPE_STENCIL_OP_KEEP:
  43                 return STENCIL_KEEP;
  44         case PIPE_STENCIL_OP_ZERO:
  45                 return STENCIL_ZERO;
  46         case PIPE_STENCIL_OP_REPLACE:
  47                 return STENCIL_REPLACE;
  48         case PIPE_STENCIL_OP_INCR:
  49                 return STENCIL_INCR_CLAMP;
  50         case PIPE_STENCIL_OP_DECR:
  51                 return STENCIL_DECR_CLAMP;
  52         case PIPE_STENCIL_OP_INCR_WRAP:
  53                 return STENCIL_INCR_WRAP;
  54         case PIPE_STENCIL_OP_DECR_WRAP:
  55                 return STENCIL_DECR_WRAP;
  56         case PIPE_STENCIL_OP_INVERT:
  57                 return STENCIL_INVERT;
  58         default:
  59                 DBG("invalid stencil op: %u", op);
  60                 return 0;
  61         }
  62 }
  63
  64 static void *
  65 fd_zsa_state_create(struct pipe_context *pctx,
  66                 const struct pipe_depth_stencil_alpha_state *cso)
  67 {
  68         struct fd_zsa_stateobj *so;
  69
  70         so = CALLOC_STRUCT(fd_zsa_stateobj);
  71         if (!so)
  72                 return NULL;
  73
  74         so->base = *cso;
  75
  76         so->rb_depthcontrol |=
  77                 A2XX_RB_DEPTHCONTROL_ZFUNC(cso->depth.func); /* maps 1:1 */
  78
  79         if (cso->depth.enabled)
  80                 so->rb_depthcontrol |= A2XX_RB_DEPTHCONTROL_Z_ENABLE;
  81         if (cso->depth.writemask)
  82                 so->rb_depthcontrol |= A2XX_RB_DEPTHCONTROL_Z_WRITE_ENABLE;
  83
  84         if (cso->stencil[0].enabled) {
  85                 const struct pipe_stencil_state *s = &cso->stencil[0];
  86
  87                 so->rb_depthcontrol |=
  88                         A2XX_RB_DEPTHCONTROL_STENCIL_ENABLE |
  89                         A2XX_RB_DEPTHCONTROL_STENCILFUNC(s->func) | /* maps 1:1 */
  90                         A2XX_RB_DEPTHCONTROL_STENCILFAIL(stencil_op(s->fail_op)) |
  91                         A2XX_RB_DEPTHCONTROL_STENCILZPASS(stencil_op(s->zpass_op)) |
  92                         A2XX_RB_DEPTHCONTROL_STENCILZFAIL(stencil_op(s->zfail_op));
  93                 so->rb_stencilrefmask |=
  94                         0xff000000 | /* ??? */
  95                         A2XX_RB_STENCILREFMASK_STENCILWRITEMASK(s->writemask) |
  96                         A2XX_RB_STENCILREFMASK_STENCILMASK(s->valuemask);
  97
  98                 if (cso->stencil[1].enabled) {
  99                         const struct pipe_stencil_state *bs = &cso->stencil[1];
 100
 101                         so->rb_depthcontrol |=
 102                                 A2XX_RB_DEPTHCONTROL_BACKFACE_ENABLE |
 103                                 A2XX_RB_DEPTHCONTROL_STENCILFUNC_BF(bs->func) | /* maps 1:1 */
 104                                 A2XX_RB_DEPTHCONTROL_STENCILFAIL_BF(stencil_op(bs->fail_op)) |
 105                                 A2XX_RB_DEPTHCONTROL_STENCILZPASS_BF(stencil_op(bs->zpass_op)) |
 106                                 A2XX_RB_DEPTHCONTROL_STENCILZFAIL_BF(stencil_op(bs->zfail_op));
 107                         so->rb_stencilrefmask_bf |=
 108                                 0xff000000 | /* ??? */
 109                                 A2XX_RB_STENCILREFMASK_STENCILWRITEMASK(bs->writemask) |
 110                                 A2XX_RB_STENCILREFMASK_STENCILMASK(bs->valuemask);
 111                 }
 112         }
 113
 114         if (cso->alpha.enabled) {
 115                 so->rb_colorcontrol =
 116                         A2XX_RB_COLORCONTROL_ALPHA_FUNC(cso->alpha.func) |
 117                         A2XX_RB_COLORCONTROL_ALPHA_TEST_ENABLE;
 118                 so->rb_alpha_ref = fui(cso->alpha.ref_value);
 119         }
 120
 121         return so;
 122 }
 123
 124 static void
 125 fd_zsa_state_bind(struct pipe_context *pctx, void *hwcso)
 126 {
 127         struct fd_context *ctx = fd_context(pctx);
 128         ctx->zsa = hwcso;
 129         ctx->dirty |= FD_DIRTY_ZSA;
 130 }
 131
 132 static void
 133 fd_zsa_state_delete(struct pipe_context *pctx, void *hwcso)
 134 {
 135         FREE(hwcso);
 136 }
 137
 138 void
 139 fd_zsa_init(struct pipe_context *pctx)
 140 {
 141         pctx->create_depth_stencil_alpha_state = fd_zsa_state_create;
 142         pctx->bind_depth_stencil_alpha_state = fd_zsa_state_bind;
 143         pctx->delete_depth_stencil_alpha_state = fd_zsa_state_delete;
 144 }