src/gallium/drivers/freedreno/a4xx/fd4_zsa.c

   1 /*
   2  * Copyright (C) 2014 Rob Clark <robclark@freedesktop.org>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  * Authors:
  24  *    Rob Clark <robclark@freedesktop.org>
  25  */
  26
  27
  28 #include "pipe/p_state.h"
  29 #include "util/u_string.h"
  30 #include "util/u_memory.h"
  31
  32 #include "fd4_zsa.h"
  33 #include "fd4_context.h"
  34 #include "fd4_format.h"
  35
  36 void *
  37 fd4_zsa_state_create(struct pipe_context *pctx,
  38                 const struct pipe_depth_stencil_alpha_state *cso)
  39 {
  40         struct fd4_zsa_stateobj *so;
  41
  42         so = CALLOC_STRUCT(fd4_zsa_stateobj);
  43         if (!so)
  44                 return NULL;
  45
  46         so->base = *cso;
  47
  48         so->rb_depth_control |=
  49                         A4XX_RB_DEPTH_CONTROL_ZFUNC(cso->depth.func); /* maps 1:1 */
  50
  51         if (cso->depth.enabled)
  52                 so->rb_depth_control |=
  53                         A4XX_RB_DEPTH_CONTROL_Z_ENABLE |
  54                         A4XX_RB_DEPTH_CONTROL_Z_TEST_ENABLE;
  55
  56         if (cso->depth.writemask)
  57                 so->rb_depth_control |= A4XX_RB_DEPTH_CONTROL_Z_WRITE_ENABLE;
  58
  59         if (cso->stencil[0].enabled) {
  60                 const struct pipe_stencil_state *s = &cso->stencil[0];
  61
  62                 so->rb_stencil_control |=
  63                         A4XX_RB_STENCIL_CONTROL_STENCIL_READ |
  64                         A4XX_RB_STENCIL_CONTROL_STENCIL_ENABLE |
  65                         A4XX_RB_STENCIL_CONTROL_FUNC(s->func) | /* maps 1:1 */
  66                         A4XX_RB_STENCIL_CONTROL_FAIL(fd_stencil_op(s->fail_op)) |
  67                         A4XX_RB_STENCIL_CONTROL_ZPASS(fd_stencil_op(s->zpass_op)) |
  68                         A4XX_RB_STENCIL_CONTROL_ZFAIL(fd_stencil_op(s->zfail_op));
  69                 so->rb_stencil_control2 |=
  70                         A4XX_RB_STENCIL_CONTROL2_STENCIL_BUFFER;
  71                 so->rb_stencilrefmask |=
  72                         0xff000000 | /* ??? */
  73                         A4XX_RB_STENCILREFMASK_STENCILWRITEMASK(s->writemask) |
  74                         A4XX_RB_STENCILREFMASK_STENCILMASK(s->valuemask);
  75
  76                 if (cso->stencil[1].enabled) {
  77                         const struct pipe_stencil_state *bs = &cso->stencil[1];
  78
  79                         so->rb_stencil_control |=
  80                                 A4XX_RB_STENCIL_CONTROL_STENCIL_ENABLE_BF |
  81                                 A4XX_RB_STENCIL_CONTROL_FUNC_BF(bs->func) | /* maps 1:1 */
  82                                 A4XX_RB_STENCIL_CONTROL_FAIL_BF(fd_stencil_op(bs->fail_op)) |
  83                                 A4XX_RB_STENCIL_CONTROL_ZPASS_BF(fd_stencil_op(bs->zpass_op)) |
  84                                 A4XX_RB_STENCIL_CONTROL_ZFAIL_BF(fd_stencil_op(bs->zfail_op));
  85                         so->rb_stencilrefmask_bf |=
  86                                 0xff000000 | /* ??? */
  87                                 A4XX_RB_STENCILREFMASK_BF_STENCILWRITEMASK(bs->writemask) |
  88                                 A4XX_RB_STENCILREFMASK_BF_STENCILMASK(bs->valuemask);
  89                 }
  90         }
  91
  92         if (cso->alpha.enabled) {
  93                 uint32_t ref = cso->alpha.ref_value * 255.0;
  94                 so->gras_alpha_control =
  95                         A4XX_GRAS_ALPHA_CONTROL_ALPHA_TEST_ENABLE;
  96                 so->rb_alpha_control =
  97                         A4XX_RB_ALPHA_CONTROL_ALPHA_TEST |
  98                         A4XX_RB_ALPHA_CONTROL_ALPHA_REF(ref) |
  99                         A4XX_RB_ALPHA_CONTROL_ALPHA_TEST_FUNC(cso->alpha.func);
 100                 so->rb_depth_control |=
 101                         A4XX_RB_DEPTH_CONTROL_EARLY_Z_DISABLE;
 102         }
 103
 104         return so;
 105 }