src/gallium/drivers/freedreno/a4xx/fd4_rasterizer.c

   1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
   2
   3 /*
   4  * Copyright (C) 2014 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 "fd4_rasterizer.h"
  35 #include "fd4_context.h"
  36 #include "fd4_format.h"
  37
  38 void *
  39 fd4_rasterizer_state_create(struct pipe_context *pctx,
  40                 const struct pipe_rasterizer_state *cso)
  41 {
  42         struct fd4_rasterizer_stateobj *so;
  43         float psize_min, psize_max;
  44
  45         so = CALLOC_STRUCT(fd4_rasterizer_stateobj);
  46         if (!so)
  47                 return NULL;
  48
  49         so->base = *cso;
  50
  51         if (cso->point_size_per_vertex) {
  52                 psize_min = util_get_min_point_size(cso);
  53                 psize_max = 4092;
  54         } else {
  55                 /* Force the point size to be as if the vertex output was disabled. */
  56                 psize_min = cso->point_size;
  57                 psize_max = cso->point_size;
  58         }
  59
  60 /*
  61         if (cso->line_stipple_enable) {
  62                 ??? TODO line stipple
  63         }
  64         TODO cso->half_pixel_center
  65         if (cso->multisample)
  66                 TODO
  67 */
  68         so->gras_cl_clip_cntl = 0x80000; /* ??? */
  69         so->gras_su_point_minmax =
  70                         A4XX_GRAS_SU_POINT_MINMAX_MIN(psize_min) |
  71                         A4XX_GRAS_SU_POINT_MINMAX_MAX(psize_max);
  72         so->gras_su_point_size   = A4XX_GRAS_SU_POINT_SIZE(cso->point_size);
  73         so->gras_su_poly_offset_scale =
  74                         A4XX_GRAS_SU_POLY_OFFSET_SCALE(cso->offset_scale);
  75         so->gras_su_poly_offset_offset =
  76                         A4XX_GRAS_SU_POLY_OFFSET_OFFSET(cso->offset_units);
  77
  78         so->gras_su_mode_control =
  79                         A4XX_GRAS_SU_MODE_CONTROL_LINEHALFWIDTH(cso->line_width/2.0);
  80         so->pc_prim_vtx_cntl2 =
  81                 A4XX_PC_PRIM_VTX_CNTL2_POLYMODE_FRONT_PTYPE(fd_polygon_mode(cso->fill_front)) |
  82                 A4XX_PC_PRIM_VTX_CNTL2_POLYMODE_BACK_PTYPE(fd_polygon_mode(cso->fill_back));
  83
  84         if (cso->fill_front != PIPE_POLYGON_MODE_FILL ||
  85                 cso->fill_back != PIPE_POLYGON_MODE_FILL)
  86                 so->pc_prim_vtx_cntl2 |= A4XX_PC_PRIM_VTX_CNTL2_POLYMODE_ENABLE;
  87
  88         if (cso->cull_face & PIPE_FACE_FRONT)
  89                 so->gras_su_mode_control |= A4XX_GRAS_SU_MODE_CONTROL_CULL_FRONT;
  90         if (cso->cull_face & PIPE_FACE_BACK)
  91                 so->gras_su_mode_control |= A4XX_GRAS_SU_MODE_CONTROL_CULL_BACK;
  92         if (!cso->front_ccw)
  93                 so->gras_su_mode_control |= A4XX_GRAS_SU_MODE_CONTROL_FRONT_CW;
  94         if (!cso->flatshade_first)
  95                 so->pc_prim_vtx_cntl |= A4XX_PC_PRIM_VTX_CNTL_PROVOKING_VTX_LAST;
  96
  97         if (cso->offset_tri)
  98                 so->gras_su_mode_control |= A4XX_GRAS_SU_MODE_CONTROL_POLY_OFFSET;
  99
 100         if (!cso->depth_clip_near)
 101                 so->gras_cl_clip_cntl |= A4XX_GRAS_CL_CLIP_CNTL_ZNEAR_CLIP_DISABLE |
 102                         A4XX_GRAS_CL_CLIP_CNTL_ZFAR_CLIP_DISABLE;
 103         if (cso->clip_halfz)
 104                 so->gras_cl_clip_cntl |= A4XX_GRAS_CL_CLIP_CNTL_ZERO_GB_SCALE_Z;
 105
 106         return so;
 107 }