src/gallium/auxiliary/draw/draw_pipe.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   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   */
  32
  33 #include "draw/draw_private.h"
  34 #include "draw/draw_pipe.h"
  35
  36
  37
  38 boolean draw_pipeline_init( struct draw_context *draw )
  39 {
  40    /* create pipeline stages */
  41    draw->pipeline.wide_line  = draw_wide_line_stage( draw );
  42    draw->pipeline.wide_point = draw_wide_point_stage( draw );
  43    draw->pipeline.stipple   = draw_stipple_stage( draw );
  44    draw->pipeline.unfilled  = draw_unfilled_stage( draw );
  45    draw->pipeline.twoside   = draw_twoside_stage( draw );
  46    draw->pipeline.offset    = draw_offset_stage( draw );
  47    draw->pipeline.clip      = draw_clip_stage( draw );
  48    draw->pipeline.flatshade = draw_flatshade_stage( draw );
  49    draw->pipeline.cull      = draw_cull_stage( draw );
  50    draw->pipeline.validate  = draw_validate_stage( draw );
  51    draw->pipeline.first     = draw->pipeline.validate;
  52
  53    if (!draw->pipeline.wide_line ||
  54        !draw->pipeline.wide_point ||
  55        !draw->pipeline.stipple ||
  56        !draw->pipeline.unfilled ||
  57        !draw->pipeline.twoside ||
  58        !draw->pipeline.offset ||
  59        !draw->pipeline.clip ||
  60        !draw->pipeline.flatshade ||
  61        !draw->pipeline.cull ||
  62        !draw->pipeline.validate)
  63       return FALSE;
  64
  65    /* these defaults are oriented toward the needs of softpipe */
  66    draw->pipeline.wide_point_threshold = 1000000.0; /* infinity */
  67    draw->pipeline.wide_line_threshold = 1.0;
  68    draw->pipeline.line_stipple = TRUE;
  69    draw->pipeline.point_sprite = TRUE;
  70
  71    return TRUE;
  72 }
  73
  74
  75 void draw_pipeline_destroy( struct draw_context *draw )
  76 {
  77    if (draw->pipeline.wide_line)
  78       draw->pipeline.wide_line->destroy( draw->pipeline.wide_line );
  79    if (draw->pipeline.wide_point)
  80       draw->pipeline.wide_point->destroy( draw->pipeline.wide_point );
  81    if (draw->pipeline.stipple)
  82       draw->pipeline.stipple->destroy( draw->pipeline.stipple );
  83    if (draw->pipeline.unfilled)
  84       draw->pipeline.unfilled->destroy( draw->pipeline.unfilled );
  85    if (draw->pipeline.twoside)
  86       draw->pipeline.twoside->destroy( draw->pipeline.twoside );
  87    if (draw->pipeline.offset)
  88       draw->pipeline.offset->destroy( draw->pipeline.offset );
  89    if (draw->pipeline.clip)
  90       draw->pipeline.clip->destroy( draw->pipeline.clip );
  91    if (draw->pipeline.flatshade)
  92       draw->pipeline.flatshade->destroy( draw->pipeline.flatshade );
  93    if (draw->pipeline.cull)
  94       draw->pipeline.cull->destroy( draw->pipeline.cull );
  95    if (draw->pipeline.validate)
  96       draw->pipeline.validate->destroy( draw->pipeline.validate );
  97    if (draw->pipeline.aaline)
  98       draw->pipeline.aaline->destroy( draw->pipeline.aaline );
  99    if (draw->pipeline.aapoint)
 100       draw->pipeline.aapoint->destroy( draw->pipeline.aapoint );
 101    if (draw->pipeline.pstipple)
 102       draw->pipeline.pstipple->destroy( draw->pipeline.pstipple );
 103    if (draw->pipeline.rasterize)
 104       draw->pipeline.rasterize->destroy( draw->pipeline.rasterize );
 105 }
 106
 107
 108
 109
 110
 111
 112
 113 static void do_point( struct draw_context *draw,
 114                       const char *v0 )
 115 {
 116    struct prim_header prim;
 117
 118    prim.flags = 0;
 119    prim.pad = 0;
 120    prim.v[0] = (struct vertex_header *)v0;
 121
 122    draw->pipeline.first->point( draw->pipeline.first, &prim );
 123 }
 124
 125
 126 static void do_line( struct draw_context *draw,
 127                      ushort flags,
 128                      const char *v0,
 129                      const char *v1 )
 130 {
 131    struct prim_header prim;
 132
 133    prim.flags = flags;
 134    prim.pad = 0;
 135    prim.v[0] = (struct vertex_header *)v0;
 136    prim.v[1] = (struct vertex_header *)v1;
 137
 138    draw->pipeline.first->line( draw->pipeline.first, &prim );
 139 }
 140
 141
 142 static void do_triangle( struct draw_context *draw,
 143                          ushort flags,
 144                          char *v0,
 145                          char *v1,
 146                          char *v2 )
 147 {
 148    struct prim_header prim;
 149
 150    prim.v[0] = (struct vertex_header *)v0;
 151    prim.v[1] = (struct vertex_header *)v1;
 152    prim.v[2] = (struct vertex_header *)v2;
 153    prim.flags = flags;
 154    prim.pad = 0;
 155
 156    draw->pipeline.first->tri( draw->pipeline.first, &prim );
 157 }
 158
 159
 160
 161
 162 /* Code to run the pipeline on a fairly arbitary collection of vertices.
 163  *
 164  * Vertex headers must be pre-initialized with the
 165  * UNDEFINED_VERTEX_ID, this code will cause that id to become
 166  * overwritten, so it may have to be reset if there is the intention
 167  * to reuse the vertices.
 168  *
 169  * This code provides a callback to reset the vertex id's which the
 170  * draw_vbuf.c code uses when it has to perform a flush.
 171  */
 172 void draw_pipeline_run( struct draw_context *draw,
 173                         unsigned prim,
 174                         struct vertex_header *vertices,
 175                         unsigned vertex_count,
 176                         unsigned stride,
 177                         const ushort *elts,
 178                         unsigned count )
 179 {
 180    char *verts = (char *)vertices;
 181    unsigned i;
 182
 183    draw->pipeline.verts = verts;
 184    draw->pipeline.vertex_stride = stride;
 185    draw->pipeline.vertex_count = vertex_count;
 186
 187    switch (prim) {
 188    case PIPE_PRIM_POINTS:
 189       for (i = 0; i < count; i++)
 190          do_point( draw,
 191                    verts + stride * elts[i] );
 192       break;
 193    case PIPE_PRIM_LINES:
 194       for (i = 0; i+1 < count; i += 2)
 195          do_line( draw,
 196                   elts[i+0],  /* flags */
 197                   verts + stride * (elts[i+0] & ~DRAW_PIPE_FLAG_MASK),
 198                   verts + stride * elts[i+1]);
 199       break;
 200    case PIPE_PRIM_TRIANGLES:
 201       for (i = 0; i+2 < count; i += 3)
 202          do_triangle( draw,
 203                       elts[i+0],  /* flags */
 204                       verts + stride * (elts[i+0] & ~DRAW_PIPE_FLAG_MASK),
 205                       verts + stride * elts[i+1],
 206                       verts + stride * elts[i+2]);
 207       break;
 208    }
 209
 210    draw->pipeline.verts = NULL;
 211    draw->pipeline.vertex_count = 0;
 212 }
 213
 214 #define QUAD(i0,i1,i2,i3)                                        \
 215    do_triangle( draw,                                            \
 216                 ( DRAW_PIPE_RESET_STIPPLE |                      \
 217                   DRAW_PIPE_EDGE_FLAG_0 |                        \
 218                   DRAW_PIPE_EDGE_FLAG_2 ),                       \
 219                  verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK), \
 220                  verts + stride * (i1),                          \
 221                 verts + stride * (i3));                          \
 222       do_triangle( draw,                                         \
 223                    ( DRAW_PIPE_EDGE_FLAG_0 |                     \
 224                      DRAW_PIPE_EDGE_FLAG_1 ),                    \
 225                  verts + stride * ((i1) & ~DRAW_PIPE_FLAG_MASK), \
 226                  verts + stride * (i2),                          \
 227                  verts + stride * (i3))
 228
 229 #define TRIANGLE(flags,i0,i1,i2)                                 \
 230    do_triangle( draw,                                            \
 231                 flags,  /* flags */                              \
 232                  verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK), \
 233                  verts + stride * (i1),                          \
 234                  verts + stride * (i2))
 235
 236 #define LINE(flags,i0,i1)                                   \
 237    do_line( draw,                                           \
 238             flags,                                          \
 239             verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK), \
 240             verts + stride * (i1))
 241
 242 #define POINT(i0)                               \
 243    do_point( draw,                              \
 244              verts + stride * i0 )
 245
 246 #define FUNC pipe_run_linear
 247 #define ARGS                                    \
 248     struct draw_context *draw,                  \
 249     unsigned prim,                              \
 250     struct vertex_header *vertices,             \
 251     unsigned stride
 252
 253 #define LOCAL_VARS                                           \
 254    char *verts = (char *)vertices;                           \
 255    boolean flatfirst = (draw->rasterizer->flatshade &&       \
 256                         draw->rasterizer->flatshade_first);  \
 257    unsigned i;                                               \
 258    ushort flags
 259
 260 #define FLUSH
 261
 262 #include "draw_pt_decompose.h"
 263
 264 void draw_pipeline_run_linear( struct draw_context *draw,
 265                                unsigned prim,
 266                                struct vertex_header *vertices,
 267                                unsigned count,
 268                                unsigned stride )
 269 {
 270    char *verts = (char *)vertices;
 271    draw->pipeline.verts = verts;
 272    draw->pipeline.vertex_stride = stride;
 273    draw->pipeline.vertex_count = count;
 274
 275    pipe_run_linear(draw, prim, vertices, stride, count);
 276
 277    draw->pipeline.verts = NULL;
 278    draw->pipeline.vertex_count = 0;
 279 }
 280
 281
 282 void draw_pipeline_flush( struct draw_context *draw,
 283                           unsigned flags )
 284 {
 285    draw->pipeline.first->flush( draw->pipeline.first, flags );
 286    draw->pipeline.first = draw->pipeline.validate;
 287 }