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  * Build primitive to render a point with vertex at v0.
 111  */
 112 static void do_point( struct draw_context *draw,
 113                       const char *v0 )
 114 {
 115    struct prim_header prim;
 116
 117    prim.flags = 0;
 118    prim.pad = 0;
 119    prim.v[0] = (struct vertex_header *)v0;
 120
 121    draw->pipeline.first->point( draw->pipeline.first, &prim );
 122 }
 123
 124
 125 /**
 126  * Build primitive to render a line with vertices at v0, v1.
 127  * \param flags  bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
 128  */
 129 static void do_line( struct draw_context *draw,
 130                      ushort flags,
 131                      const char *v0,
 132                      const char *v1 )
 133 {
 134    struct prim_header prim;
 135
 136    prim.flags = flags;
 137    prim.pad = 0;
 138    prim.v[0] = (struct vertex_header *)v0;
 139    prim.v[1] = (struct vertex_header *)v1;
 140
 141    draw->pipeline.first->line( draw->pipeline.first, &prim );
 142 }
 143
 144
 145 /**
 146  * Build primitive to render a triangle with vertices at v0, v1, v2.
 147  * \param flags  bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
 148  */
 149 static void do_triangle( struct draw_context *draw,
 150                          ushort flags,
 151                          char *v0,
 152                          char *v1,
 153                          char *v2 )
 154 {
 155    struct prim_header prim;
 156
 157    prim.v[0] = (struct vertex_header *)v0;
 158    prim.v[1] = (struct vertex_header *)v1;
 159    prim.v[2] = (struct vertex_header *)v2;
 160    prim.flags = flags;
 161    prim.pad = 0;
 162
 163    draw->pipeline.first->tri( draw->pipeline.first, &prim );
 164 }
 165
 166
 167 /*
 168  * Set up macros for draw_pt_decompose.h template code.
 169  * This code uses vertex indexes / elements.
 170  */
 171 #define QUAD(i0,i1,i2,i3)                       \
 172    do_triangle( draw,                           \
 173                 ( DRAW_PIPE_RESET_STIPPLE |     \
 174                   DRAW_PIPE_EDGE_FLAG_0 |       \
 175                   DRAW_PIPE_EDGE_FLAG_2 ),      \
 176                 verts + stride * elts[i0],      \
 177                 verts + stride * elts[i1],      \
 178                 verts + stride * elts[i3]);     \
 179    do_triangle( draw,                           \
 180                 ( DRAW_PIPE_EDGE_FLAG_0 |       \
 181                   DRAW_PIPE_EDGE_FLAG_1 ),      \
 182                 verts + stride * elts[i1],      \
 183                 verts + stride * elts[i2],      \
 184                 verts + stride * elts[i3])
 185
 186 #define TRIANGLE(flags,i0,i1,i2)                                        \
 187    do_triangle( draw,                                                   \
 188                 elts[i0],  /* flags */                                  \
 189                 verts + stride * (elts[i0] & ~DRAW_PIPE_FLAG_MASK),     \
 190                 verts + stride * elts[i1],                              \
 191                 verts + stride * elts[i2])
 192
 193 #define LINE(flags,i0,i1)                                       \
 194    do_line( draw,                                               \
 195             elts[i0],                                           \
 196             verts + stride * (elts[i0] & ~DRAW_PIPE_FLAG_MASK), \
 197             verts + stride * elts[i1])
 198
 199 #define POINT(i0)                               \
 200    do_point( draw,                              \
 201              verts + stride * elts[i0] )
 202
 203 #define FUNC pipe_run
 204 #define ARGS                                    \
 205     struct draw_context *draw,                  \
 206     unsigned prim,                              \
 207     struct vertex_header *vertices,             \
 208     unsigned stride,                            \
 209     const ushort *elts
 210
 211 #define LOCAL_VARS                                           \
 212    char *verts = (char *)vertices;                           \
 213    boolean flatfirst = (draw->rasterizer->flatshade &&       \
 214                         draw->rasterizer->flatshade_first);  \
 215    unsigned i;                                               \
 216    ushort flags
 217
 218 #define FLUSH
 219
 220 #include "draw_pt_decompose.h"
 221 #undef ARGS
 222 #undef LOCAL_VARS
 223
 224
 225
 226 /**
 227  * Code to run the pipeline on a fairly arbitary collection of vertices.
 228  * For drawing indexed primitives.
 229  *
 230  * Vertex headers must be pre-initialized with the
 231  * UNDEFINED_VERTEX_ID, this code will cause that id to become
 232  * overwritten, so it may have to be reset if there is the intention
 233  * to reuse the vertices.
 234  *
 235  * This code provides a callback to reset the vertex id's which the
 236  * draw_vbuf.c code uses when it has to perform a flush.
 237  */
 238 void draw_pipeline_run( struct draw_context *draw,
 239                         unsigned prim,
 240                         struct vertex_header *vertices,
 241                         unsigned vertex_count,
 242                         unsigned stride,
 243                         const ushort *elts,
 244                         unsigned count )
 245 {
 246    char *verts = (char *)vertices;
 247
 248    draw->pipeline.verts = verts;
 249    draw->pipeline.vertex_stride = stride;
 250    draw->pipeline.vertex_count = vertex_count;
 251
 252    pipe_run(draw, prim, vertices, stride, elts, count);
 253
 254    draw->pipeline.verts = NULL;
 255    draw->pipeline.vertex_count = 0;
 256 }
 257
 258
 259
 260 /*
 261  * Set up macros for draw_pt_decompose.h template code.
 262  * This code is for non-indexed rendering (no elts).
 263  */
 264 #define QUAD(i0,i1,i2,i3)                                        \
 265    do_triangle( draw,                                            \
 266                 ( DRAW_PIPE_RESET_STIPPLE |                      \
 267                   DRAW_PIPE_EDGE_FLAG_0 |                        \
 268                   DRAW_PIPE_EDGE_FLAG_2 ),                       \
 269                 verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK),  \
 270                 verts + stride * (i1),                           \
 271                 verts + stride * (i3));                          \
 272    do_triangle( draw,                                            \
 273                 ( DRAW_PIPE_EDGE_FLAG_0 |                        \
 274                   DRAW_PIPE_EDGE_FLAG_1 ),                       \
 275                 verts + stride * ((i1) & ~DRAW_PIPE_FLAG_MASK),  \
 276                 verts + stride * (i2),                           \
 277                 verts + stride * (i3))
 278
 279 #define TRIANGLE(flags,i0,i1,i2)                                 \
 280    do_triangle( draw,                                            \
 281                 flags,  /* flags */                              \
 282                 verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK),  \
 283                 verts + stride * (i1),                           \
 284                 verts + stride * (i2))
 285
 286 #define LINE(flags,i0,i1)                                   \
 287    do_line( draw,                                           \
 288             flags,                                          \
 289             verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK), \
 290             verts + stride * (i1))
 291
 292 #define POINT(i0)                               \
 293    do_point( draw,                              \
 294              verts + stride * i0 )
 295
 296 #define FUNC pipe_run_linear
 297 #define ARGS                                    \
 298     struct draw_context *draw,                  \
 299     unsigned prim,                              \
 300     struct vertex_header *vertices,             \
 301     unsigned stride
 302
 303 #define LOCAL_VARS                                           \
 304    char *verts = (char *)vertices;                           \
 305    boolean flatfirst = (draw->rasterizer->flatshade &&       \
 306                         draw->rasterizer->flatshade_first);  \
 307    unsigned i;                                               \
 308    ushort flags
 309
 310 #define FLUSH
 311
 312 #include "draw_pt_decompose.h"
 313
 314
 315 /*
 316  * For drawing non-indexed primitives.
 317  */
 318 void draw_pipeline_run_linear( struct draw_context *draw,
 319                                unsigned prim,
 320                                struct vertex_header *vertices,
 321                                unsigned count,
 322                                unsigned stride )
 323 {
 324    char *verts = (char *)vertices;
 325    draw->pipeline.verts = verts;
 326    draw->pipeline.vertex_stride = stride;
 327    draw->pipeline.vertex_count = count;
 328
 329    pipe_run_linear(draw, prim, vertices, stride, count);
 330
 331    draw->pipeline.verts = NULL;
 332    draw->pipeline.vertex_count = 0;
 333 }
 334
 335
 336 void draw_pipeline_flush( struct draw_context *draw,
 337                           unsigned flags )
 338 {
 339    draw->pipeline.first->flush( draw->pipeline.first, flags );
 340    draw->pipeline.first = draw->pipeline.validate;
 341 }