src/gallium/drivers/softpipe/sp_prim_setup.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * \brief A draw stage that drives our triangle setup routines from
  30  * within the draw pipeline.  One of two ways to drive setup, the
  31  * other being in sp_prim_vbuf.c.
  32  *
  33  * \author  Keith Whitwell <keith@tungstengraphics.com>
  34  * \author  Brian Paul
  35  */
  36
  37
  38 #include "sp_context.h"
  39 #include "sp_setup.h"
  40 #include "sp_state.h"
  41 #include "sp_prim_setup.h"
  42 #include "draw/draw_pipe.h"
  43 #include "draw/draw_vertex.h"
  44 #include "pipe/p_util.h"
  45
  46 /**
  47  * Triangle setup info (derived from draw_stage).
  48  * Also used for line drawing (taking some liberties).
  49  */
  50 struct setup_stage {
  51    struct draw_stage stage; /**< This must be first (base class) */
  52
  53    struct setup_context *setup;
  54 };
  55
  56
  57
  58 /**
  59  * Basically a cast wrapper.
  60  */
  61 static INLINE struct setup_stage *setup_stage( struct draw_stage *stage )
  62 {
  63    return (struct setup_stage *)stage;
  64 }
  65
  66
  67
  68 static void
  69 do_tri(struct draw_stage *stage, struct prim_header *prim)
  70 {
  71    struct setup_stage *setup = setup_stage( stage );
  72
  73    setup_tri( setup->setup,
  74               prim->v[0]->data,
  75               prim->v[1]->data,
  76               prim->v[2]->data );
  77 }
  78
  79 static void
  80 do_line(struct draw_stage *stage, struct prim_header *prim)
  81 {
  82    struct setup_stage *setup = setup_stage( stage );
  83
  84    setup_line( setup->setup,
  85                prim->v[0]->data,
  86                prim->v[1]->data );
  87 }
  88
  89 static void
  90 do_point(struct draw_stage *stage, struct prim_header *prim)
  91 {
  92    struct setup_stage *setup = setup_stage( stage );
  93
  94    setup_point( setup->setup,
  95                 prim->v[0]->data );
  96 }
  97
  98
  99
 100
 101 static void setup_begin( struct draw_stage *stage )
 102 {
 103    struct setup_stage *setup = setup_stage(stage);
 104
 105    setup_prepare( setup->setup );
 106
 107    stage->point = do_point;
 108    stage->line = do_line;
 109    stage->tri = do_tri;
 110 }
 111
 112
 113 static void setup_first_point( struct draw_stage *stage,
 114                                struct prim_header *header )
 115 {
 116    setup_begin(stage);
 117    stage->point( stage, header );
 118 }
 119
 120 static void setup_first_line( struct draw_stage *stage,
 121                                struct prim_header *header )
 122 {
 123    setup_begin(stage);
 124    stage->line( stage, header );
 125 }
 126
 127
 128 static void setup_first_tri( struct draw_stage *stage,
 129                                struct prim_header *header )
 130 {
 131    setup_begin(stage);
 132    stage->tri( stage, header );
 133 }
 134
 135
 136
 137 static void setup_flush( struct draw_stage *stage,
 138                          unsigned flags )
 139 {
 140    stage->point = setup_first_point;
 141    stage->line = setup_first_line;
 142    stage->tri = setup_first_tri;
 143 }
 144
 145
 146 static void reset_stipple_counter( struct draw_stage *stage )
 147 {
 148 }
 149
 150
 151 static void render_destroy( struct draw_stage *stage )
 152 {
 153    struct setup_stage *ssetup = setup_stage(stage);
 154    setup_destroy_context(ssetup->setup);
 155    FREE( stage );
 156 }
 157
 158
 159 /**
 160  * Create a new primitive setup/render stage.
 161  */
 162 struct draw_stage *sp_draw_render_stage( struct softpipe_context *softpipe )
 163 {
 164    struct setup_stage *sstage = CALLOC_STRUCT(setup_stage);
 165
 166    sstage->setup = setup_create_context(softpipe);
 167    sstage->stage.draw = softpipe->draw;
 168    sstage->stage.point = setup_first_point;
 169    sstage->stage.line = setup_first_line;
 170    sstage->stage.tri = setup_first_tri;
 171    sstage->stage.flush = setup_flush;
 172    sstage->stage.reset_stipple_counter = reset_stipple_counter;
 173    sstage->stage.destroy = render_destroy;
 174
 175    return (struct draw_stage *)sstage;
 176 }
 177
 178 struct setup_context *
 179 sp_draw_setup_context( struct draw_stage *stage )
 180 {
 181    struct setup_stage *ssetup = setup_stage(stage);
 182    return ssetup->setup;
 183 }
 184
 185 void
 186 sp_draw_flush( struct draw_stage *stage )
 187 {
 188    stage->flush( stage, 0 );
 189 }