src/gallium/drivers/freedreno/a6xx/fd6_rasterizer.c

   1 /*
   2  * Copyright (C) 2016 Rob Clark <robclark@freedesktop.org>
   3  * Copyright © 2018 Google, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  * Authors:
  25  *    Rob Clark <robclark@freedesktop.org>
  26  */
  27
  28
  29 #include "pipe/p_state.h"
  30 #include "util/u_string.h"
  31 #include "util/u_memory.h"
  32
  33 #include "fd6_rasterizer.h"
  34 #include "fd6_context.h"
  35 #include "fd6_format.h"
  36 #include "fd6_pack.h"
  37
  38 struct fd_ringbuffer *
  39 __fd6_setup_rasterizer_stateobj(struct fd_context *ctx,
  40                 const struct pipe_rasterizer_state *cso, bool primitive_restart)
  41 {
  42         struct fd_ringbuffer *ring = fd_ringbuffer_new_object(ctx->pipe, 18 * 4);
  43         float psize_min, psize_max;
  44
  45         if (cso->point_size_per_vertex) {
  46                 psize_min = util_get_min_point_size(cso);
  47                 psize_max = 4092;
  48         } else {
  49                 /* Force the point size to be as if the vertex output was disabled. */
  50                 psize_min = cso->point_size;
  51                 psize_max = cso->point_size;
  52         }
  53
  54         OUT_REG(ring,
  55                 A6XX_GRAS_CL_CNTL(
  56                         .znear_clip_disable = !cso->depth_clip_near,
  57                         .zfar_clip_disable = !cso->depth_clip_far,
  58                         .unk5 = !cso->depth_clip_near || !cso->depth_clip_far,
  59                         .vp_clip_code_ignore = 1,
  60                         .zero_gb_scale_z = cso->clip_halfz
  61                         ),
  62                 A6XX_GRAS_VS_CL_CNTL());
  63
  64         OUT_REG(ring,
  65                 A6XX_GRAS_SU_CNTL(
  66                         .linehalfwidth = cso->line_width / 2.0,
  67                         .poly_offset = cso->offset_tri,
  68                         .msaa_enable = cso->multisample,
  69                         .cull_front = cso->cull_face & PIPE_FACE_FRONT,
  70                         .cull_back = cso->cull_face & PIPE_FACE_BACK,
  71                         .front_cw = !cso->front_ccw,
  72                 ));
  73
  74         OUT_REG(ring,
  75                 A6XX_GRAS_SU_POINT_MINMAX(
  76                         .min = psize_min,
  77                         .max = psize_max,
  78                 ),
  79                 A6XX_GRAS_SU_POINT_SIZE(
  80                         cso->point_size
  81                 ));
  82
  83         OUT_REG(ring,
  84                 A6XX_GRAS_SU_POLY_OFFSET_SCALE(
  85                         cso->offset_scale
  86                 ),
  87                 A6XX_GRAS_SU_POLY_OFFSET_OFFSET(
  88                         cso->offset_units
  89                 ),
  90                 A6XX_GRAS_SU_POLY_OFFSET_OFFSET_CLAMP(
  91                         cso->offset_clamp
  92                 ));
  93
  94         OUT_REG(ring,
  95                 A6XX_PC_PRIMITIVE_CNTL_0(
  96                         .provoking_vtx_last = !cso->flatshade_first,
  97                         .primitive_restart = primitive_restart,
  98                 ));
  99
 100         enum a6xx_polygon_mode mode = POLYMODE6_TRIANGLES;
 101         switch (cso->fill_front) {
 102         case PIPE_POLYGON_MODE_POINT:
 103                 mode = POLYMODE6_POINTS;
 104                 break;
 105         case PIPE_POLYGON_MODE_LINE:
 106                 mode = POLYMODE6_LINES;
 107                 break;
 108         default:
 109                 assert(cso->fill_front == PIPE_POLYGON_MODE_FILL);
 110                 break;
 111         }
 112
 113         OUT_REG(ring, A6XX_VPC_POLYGON_MODE(mode));
 114         OUT_REG(ring, A6XX_PC_POLYGON_MODE(mode));
 115
 116         return ring;
 117 }
 118
 119 void *
 120 fd6_rasterizer_state_create(struct pipe_context *pctx,
 121                 const struct pipe_rasterizer_state *cso)
 122 {
 123         struct fd6_rasterizer_stateobj *so;
 124
 125         so = CALLOC_STRUCT(fd6_rasterizer_stateobj);
 126         if (!so)
 127                 return NULL;
 128
 129         so->base = *cso;
 130
 131         return so;
 132 }
 133
 134 void
 135 fd6_rasterizer_state_delete(struct pipe_context *pctx, void *hwcso)
 136 {
 137         struct fd6_rasterizer_stateobj *so = hwcso;
 138
 139         for (unsigned i = 0; i < ARRAY_SIZE(so->stateobjs); i++)
 140                 if (so->stateobjs[i])
 141                         fd_ringbuffer_del(so->stateobjs[i]);
 142
 143         FREE(hwcso);
 144 }
 145