src/gallium/drivers/freedreno/freedreno_rasterizer.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_rasterizer.h"
  35 #include "freedreno_context.h"
  36 #include "freedreno_util.h"
  37
  38
  39 static enum pa_su_sc_draw
  40 polygon_mode(unsigned mode)
  41 {
  42         switch (mode) {
  43         case PIPE_POLYGON_MODE_POINT:
  44                 return DRAW_POINTS;
  45         case PIPE_POLYGON_MODE_LINE:
  46                 return DRAW_LINES;
  47         case PIPE_POLYGON_MODE_FILL:
  48                 return DRAW_TRIANGLES;
  49         default:
  50                 DBG("invalid polygon mode: %u", mode);
  51                 return 0;
  52         }
  53 }
  54
  55 static void *
  56 fd_rasterizer_state_create(struct pipe_context *pctx,
  57                 const struct pipe_rasterizer_state *cso)
  58 {
  59         struct fd_rasterizer_stateobj *so;
  60         float psize_min, psize_max;
  61
  62         so = CALLOC_STRUCT(fd_rasterizer_stateobj);
  63         if (!so)
  64                 return NULL;
  65
  66         if (cso->point_size_per_vertex) {
  67                 psize_min = util_get_min_point_size(cso);
  68                 psize_max = 8192;
  69         } else {
  70                 /* Force the point size to be as if the vertex output was disabled. */
  71                 psize_min = cso->point_size;
  72                 psize_max = cso->point_size;
  73         }
  74
  75         so->base = *cso;
  76
  77         so->pa_sc_line_stipple = cso->line_stipple_enable ?
  78                 PA_SC_LINE_STIPPLE_LINE_PATTERN(cso->line_stipple_pattern) |
  79                 PA_SC_LINE_STIPPLE_REPEAT_COUNT(cso->line_stipple_factor) : 0;
  80
  81         so->pa_cl_clip_cntl = 0; // TODO
  82
  83         so->pa_su_vtx_cntl =
  84                 PA_SU_VTX_CNTL_PIX_CENTER(cso->gl_rasterization_rules ? PIXCENTER_OGL : PIXCENTER_D3D) |
  85                 PA_SU_VTX_CNTL_QUANT_MODE(ONE_SIXTEENTH);
  86
  87         so->pa_su_point_size =
  88                 PA_SU_POINT_SIZE_HEIGHT(cso->point_size/2) |
  89                 PA_SU_POINT_SIZE_WIDTH(cso->point_size/2);
  90
  91         so->pa_su_point_minmax =
  92                 PA_SU_POINT_MINMAX_MIN_SIZE(psize_min/2) |
  93                 PA_SU_POINT_MINMAX_MAX_SIZE(psize_max/2);
  94
  95         so->pa_su_line_cntl =
  96                 PA_SU_LINE_CNTL_WIDTH(cso->line_width/2);
  97
  98         so->pa_su_sc_mode_cntl =
  99                 PA_SU_SC_MODE_CNTL_VTX_WINDOW_OFFSET_ENABLE |
 100                 PA_SU_SC_MODE_CNTL_POLYMODE_FRONT_PTYPE(polygon_mode(cso->fill_front)) |
 101                 PA_SU_SC_MODE_CNTL_POLYMODE_BACK_PTYPE(polygon_mode(cso->fill_back));
 102
 103         if (cso->cull_face & PIPE_FACE_FRONT)
 104                 so->pa_su_sc_mode_cntl |= PA_SU_SC_MODE_CNTL_CULL_FRONT;
 105         if (cso->cull_face & PIPE_FACE_BACK)
 106                 so->pa_su_sc_mode_cntl |= PA_SU_SC_MODE_CNTL_CULL_BACK;
 107         if (!cso->flatshade_first)
 108                 so->pa_su_sc_mode_cntl |= PA_SU_SC_MODE_CNTL_PROVOKING_VTX_LAST;
 109         if (!cso->front_ccw)
 110                 so->pa_su_sc_mode_cntl |= PA_SU_SC_MODE_CNTL_FACE;
 111         if (cso->line_stipple_enable)
 112                 so->pa_su_sc_mode_cntl |= PA_SU_SC_MODE_CNTL_LINE_STIPPLE_ENABLE;
 113         if (cso->multisample)
 114                 so->pa_su_sc_mode_cntl |= PA_SU_SC_MODE_CNTL_MSAA_ENABLE;
 115
 116         if (cso->fill_front != PIPE_POLYGON_MODE_FILL ||
 117                         cso->fill_back != PIPE_POLYGON_MODE_FILL)
 118                 so->pa_su_sc_mode_cntl |= PA_SU_SC_MODE_CNTL_POLYMODE(POLY_DUALMODE);
 119         else
 120                 so->pa_su_sc_mode_cntl |= PA_SU_SC_MODE_CNTL_POLYMODE(POLY_DISABLED);
 121
 122         if (cso->offset_tri)
 123                 so->pa_su_sc_mode_cntl |=
 124                         PA_SU_SC_MODE_CNTL_POLY_OFFSET_FRONT_ENABLE |
 125                         PA_SU_SC_MODE_CNTL_POLY_OFFSET_BACK_ENABLE |
 126                         PA_SU_SC_MODE_CNTL_POLY_OFFSET_PARA_ENABLE;
 127
 128         return so;
 129 }
 130
 131 static void
 132 fd_rasterizer_state_bind(struct pipe_context *pctx, void *hwcso)
 133 {
 134         struct fd_context *ctx = fd_context(pctx);
 135         ctx->rasterizer = hwcso;
 136         ctx->dirty |= FD_DIRTY_RASTERIZER;
 137 }
 138
 139 static void
 140 fd_rasterizer_state_delete(struct pipe_context *pctx, void *hwcso)
 141 {
 142         FREE(hwcso);
 143 }
 144
 145 void
 146 fd_rasterizer_init(struct pipe_context *pctx)
 147 {
 148         pctx->create_rasterizer_state = fd_rasterizer_state_create;
 149         pctx->bind_rasterizer_state = fd_rasterizer_state_bind;
 150         pctx->delete_rasterizer_state = fd_rasterizer_state_delete;
 151 }