src/gallium/drivers/freedreno/a3xx/fd3_rasterizer.c

   1 /*
   2  * Copyright (C) 2013 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 "fd3_rasterizer.h"
  33 #include "fd3_context.h"
  34 #include "fd3_format.h"
  35
  36 void *
  37 fd3_rasterizer_state_create(struct pipe_context *pctx,
  38                 const struct pipe_rasterizer_state *cso)
  39 {
  40         struct fd3_rasterizer_stateobj *so;
  41         float psize_min, psize_max;
  42
  43         so = CALLOC_STRUCT(fd3_rasterizer_stateobj);
  44         if (!so)
  45                 return NULL;
  46
  47         so->base = *cso;
  48
  49         if (cso->point_size_per_vertex) {
  50                 psize_min = util_get_min_point_size(cso);
  51                 psize_max = 4092;
  52         } else {
  53                 /* Force the point size to be as if the vertex output was disabled. */
  54                 psize_min = cso->point_size;
  55                 psize_max = cso->point_size;
  56         }
  57
  58 /*
  59         if (cso->line_stipple_enable) {
  60                 ??? TODO line stipple
  61         }
  62         TODO cso->half_pixel_center
  63         if (cso->multisample)
  64                 TODO
  65 */
  66         so->gras_cl_clip_cntl = A3XX_GRAS_CL_CLIP_CNTL_IJ_PERSP_CENTER /* ??? */ |
  67                 COND(cso->clip_halfz, A3XX_GRAS_CL_CLIP_CNTL_ZERO_GB_SCALE_Z);
  68         so->gras_su_point_minmax =
  69                         A3XX_GRAS_SU_POINT_MINMAX_MIN(psize_min) |
  70                         A3XX_GRAS_SU_POINT_MINMAX_MAX(psize_max);
  71         so->gras_su_point_size   = A3XX_GRAS_SU_POINT_SIZE(cso->point_size);
  72         so->gras_su_poly_offset_scale =
  73                         A3XX_GRAS_SU_POLY_OFFSET_SCALE_VAL(cso->offset_scale);
  74         so->gras_su_poly_offset_offset =
  75                         A3XX_GRAS_SU_POLY_OFFSET_OFFSET(cso->offset_units * 2.0f);
  76
  77         so->gras_su_mode_control =
  78                         A3XX_GRAS_SU_MODE_CONTROL_LINEHALFWIDTH(cso->line_width/2.0);
  79
  80         so->pc_prim_vtx_cntl =
  81                 A3XX_PC_PRIM_VTX_CNTL_POLYMODE_FRONT_PTYPE(fd_polygon_mode(cso->fill_front)) |
  82                 A3XX_PC_PRIM_VTX_CNTL_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_cntl |= A3XX_PC_PRIM_VTX_CNTL_POLYMODE_ENABLE;
  87
  88         if (cso->cull_face & PIPE_FACE_FRONT)
  89                 so->gras_su_mode_control |= A3XX_GRAS_SU_MODE_CONTROL_CULL_FRONT;
  90         if (cso->cull_face & PIPE_FACE_BACK)
  91                 so->gras_su_mode_control |= A3XX_GRAS_SU_MODE_CONTROL_CULL_BACK;
  92         if (!cso->front_ccw)
  93                 so->gras_su_mode_control |= A3XX_GRAS_SU_MODE_CONTROL_FRONT_CW;
  94         if (!cso->flatshade_first)
  95                 so->pc_prim_vtx_cntl |= A3XX_PC_PRIM_VTX_CNTL_PROVOKING_VTX_LAST;
  96
  97         if (cso->offset_tri)
  98                 so->gras_su_mode_control |= A3XX_GRAS_SU_MODE_CONTROL_POLY_OFFSET;
  99         if (!cso->depth_clip_near)
 100                 so->gras_cl_clip_cntl |= A3XX_GRAS_CL_CLIP_CNTL_CLIP_DISABLE;
 101
 102         return so;
 103 }