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 #include "util/u_debug.h"
  36
  37
  38
  39 boolean draw_pipeline_init( struct draw_context *draw )
  40 {
  41    /* create pipeline stages */
  42    draw->pipeline.wide_line  = draw_wide_line_stage( draw );
  43    draw->pipeline.wide_point = draw_wide_point_stage( draw );
  44    draw->pipeline.stipple   = draw_stipple_stage( draw );
  45    draw->pipeline.unfilled  = draw_unfilled_stage( draw );
  46    draw->pipeline.twoside   = draw_twoside_stage( draw );
  47    draw->pipeline.offset    = draw_offset_stage( draw );
  48    draw->pipeline.clip      = draw_clip_stage( draw );
  49    draw->pipeline.flatshade = draw_flatshade_stage( draw );
  50    draw->pipeline.cull      = draw_cull_stage( draw );
  51    draw->pipeline.validate  = draw_validate_stage( draw );
  52    draw->pipeline.first     = draw->pipeline.validate;
  53
  54    if (!draw->pipeline.wide_line ||
  55        !draw->pipeline.wide_point ||
  56        !draw->pipeline.stipple ||
  57        !draw->pipeline.unfilled ||
  58        !draw->pipeline.twoside ||
  59        !draw->pipeline.offset ||
  60        !draw->pipeline.clip ||
  61        !draw->pipeline.flatshade ||
  62        !draw->pipeline.cull ||
  63        !draw->pipeline.validate)
  64       return FALSE;
  65
  66    /* these defaults are oriented toward the needs of softpipe */
  67    draw->pipeline.wide_point_threshold = 1000000.0; /* infinity */
  68    draw->pipeline.wide_line_threshold = 1.0;
  69    draw->pipeline.wide_point_sprites = FALSE;
  70    draw->pipeline.line_stipple = TRUE;
  71    draw->pipeline.point_sprite = TRUE;
  72
  73    return TRUE;
  74 }
  75
  76
  77 void draw_pipeline_destroy( struct draw_context *draw )
  78 {
  79    if (draw->pipeline.wide_line)
  80       draw->pipeline.wide_line->destroy( draw->pipeline.wide_line );
  81    if (draw->pipeline.wide_point)
  82       draw->pipeline.wide_point->destroy( draw->pipeline.wide_point );
  83    if (draw->pipeline.stipple)
  84       draw->pipeline.stipple->destroy( draw->pipeline.stipple );
  85    if (draw->pipeline.unfilled)
  86       draw->pipeline.unfilled->destroy( draw->pipeline.unfilled );
  87    if (draw->pipeline.twoside)
  88       draw->pipeline.twoside->destroy( draw->pipeline.twoside );
  89    if (draw->pipeline.offset)
  90       draw->pipeline.offset->destroy( draw->pipeline.offset );
  91    if (draw->pipeline.clip)
  92       draw->pipeline.clip->destroy( draw->pipeline.clip );
  93    if (draw->pipeline.flatshade)
  94       draw->pipeline.flatshade->destroy( draw->pipeline.flatshade );
  95    if (draw->pipeline.cull)
  96       draw->pipeline.cull->destroy( draw->pipeline.cull );
  97    if (draw->pipeline.validate)
  98       draw->pipeline.validate->destroy( draw->pipeline.validate );
  99    if (draw->pipeline.aaline)
 100       draw->pipeline.aaline->destroy( draw->pipeline.aaline );
 101    if (draw->pipeline.aapoint)
 102       draw->pipeline.aapoint->destroy( draw->pipeline.aapoint );
 103    if (draw->pipeline.pstipple)
 104       draw->pipeline.pstipple->destroy( draw->pipeline.pstipple );
 105    if (draw->pipeline.rasterize)
 106       draw->pipeline.rasterize->destroy( draw->pipeline.rasterize );
 107 }
 108
 109
 110
 111 /**
 112  * Build primitive to render a point with vertex at v0.
 113  */
 114 static void do_point( struct draw_context *draw,
 115                       const char *v0 )
 116 {
 117    struct prim_header prim;
 118
 119    prim.flags = 0;
 120    prim.pad = 0;
 121    prim.v[0] = (struct vertex_header *)v0;
 122
 123    draw->pipeline.first->point( draw->pipeline.first, &prim );
 124 }
 125
 126
 127 /**
 128  * Build primitive to render a line with vertices at v0, v1.
 129  * \param flags  bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
 130  */
 131 static void do_line( struct draw_context *draw,
 132                      ushort flags,
 133                      const char *v0,
 134                      const char *v1 )
 135 {
 136    struct prim_header prim;
 137
 138    prim.flags = flags;
 139    prim.pad = 0;
 140    prim.v[0] = (struct vertex_header *)v0;
 141    prim.v[1] = (struct vertex_header *)v1;
 142
 143    draw->pipeline.first->line( draw->pipeline.first, &prim );
 144 }
 145
 146
 147 /**
 148  * Build primitive to render a triangle with vertices at v0, v1, v2.
 149  * \param flags  bitmask of DRAW_PIPE_EDGE_x, DRAW_PIPE_RESET_STIPPLE
 150  */
 151 static void do_triangle( struct draw_context *draw,
 152                          ushort flags,
 153                          char *v0,
 154                          char *v1,
 155                          char *v2 )
 156 {
 157    struct prim_header prim;
 158
 159    prim.v[0] = (struct vertex_header *)v0;
 160    prim.v[1] = (struct vertex_header *)v1;
 161    prim.v[2] = (struct vertex_header *)v2;
 162    prim.flags = flags;
 163    prim.pad = 0;
 164
 165    draw->pipeline.first->tri( draw->pipeline.first, &prim );
 166 }
 167
 168
 169 /*
 170  * Set up macros for draw_pt_decompose.h template code.
 171  * This code uses vertex indexes / elements.
 172  */
 173 #define QUAD(i0,i1,i2,i3)                       \
 174    do_triangle( draw,                           \
 175                 ( DRAW_PIPE_RESET_STIPPLE |     \
 176                   DRAW_PIPE_EDGE_FLAG_0 |       \
 177                   DRAW_PIPE_EDGE_FLAG_2 ),      \
 178                 verts + stride * elts[i0],      \
 179                 verts + stride * elts[i1],      \
 180                 verts + stride * elts[i3]);     \
 181    do_triangle( draw,                           \
 182                 ( DRAW_PIPE_EDGE_FLAG_0 |       \
 183                   DRAW_PIPE_EDGE_FLAG_1 ),      \
 184                 verts + stride * elts[i1],      \
 185                 verts + stride * elts[i2],      \
 186                 verts + stride * elts[i3])
 187
 188 #define TRIANGLE(flags,i0,i1,i2)                                        \
 189    do_triangle( draw,                                                   \
 190                 elts[i0],  /* flags */                                  \
 191                 verts + stride * (elts[i0] & ~DRAW_PIPE_FLAG_MASK),     \
 192                 verts + stride * (elts[i1] & ~DRAW_PIPE_FLAG_MASK),     \
 193                 verts + stride * (elts[i2] & ~DRAW_PIPE_FLAG_MASK) );
 194
 195 #define LINE(flags,i0,i1)                                       \
 196    do_line( draw,                                               \
 197             elts[i0],                                           \
 198             verts + stride * (elts[i0] & ~DRAW_PIPE_FLAG_MASK), \
 199             verts + stride * (elts[i1] & ~DRAW_PIPE_FLAG_MASK) );
 200
 201 #define POINT(i0)                               \
 202    do_point( draw,                              \
 203              verts + stride * elts[i0] )
 204
 205 #define FUNC pipe_run
 206 #define ARGS                                    \
 207     struct draw_context *draw,                  \
 208     unsigned prim,                              \
 209     struct vertex_header *vertices,             \
 210     unsigned stride,                            \
 211     const ushort *elts
 212
 213 #define LOCAL_VARS                                           \
 214    char *verts = (char *)vertices;                           \
 215    boolean flatfirst = (draw->rasterizer->flatshade &&       \
 216                         draw->rasterizer->flatshade_first);  \
 217    unsigned i;                                               \
 218    ushort flags
 219
 220 #define FLUSH
 221
 222 #include "draw_pt_decompose.h"
 223 #undef ARGS
 224 #undef LOCAL_VARS
 225
 226
 227
 228 /**
 229  * Code to run the pipeline on a fairly arbitrary collection of vertices.
 230  * For drawing indexed primitives.
 231  *
 232  * Vertex headers must be pre-initialized with the
 233  * UNDEFINED_VERTEX_ID, this code will cause that id to become
 234  * overwritten, so it may have to be reset if there is the intention
 235  * to reuse the vertices.
 236  *
 237  * This code provides a callback to reset the vertex id's which the
 238  * draw_vbuf.c code uses when it has to perform a flush.
 239  */
 240 void draw_pipeline_run( struct draw_context *draw,
 241                         unsigned prim,
 242                         struct vertex_header *vertices,
 243                         unsigned vertex_count,
 244                         unsigned stride,
 245                         const ushort *elts,
 246                         unsigned count )
 247 {
 248    char *verts = (char *)vertices;
 249
 250    draw->pipeline.verts = verts;
 251    draw->pipeline.vertex_stride = stride;
 252    draw->pipeline.vertex_count = vertex_count;
 253
 254    pipe_run(draw, prim, vertices, stride, elts, count);
 255
 256    draw->pipeline.verts = NULL;
 257    draw->pipeline.vertex_count = 0;
 258 }
 259
 260
 261
 262 /*
 263  * Set up macros for draw_pt_decompose.h template code.
 264  * This code is for non-indexed rendering (no elts).
 265  */
 266 #define QUAD(i0,i1,i2,i3)                                        \
 267    do_triangle( draw,                                            \
 268                 ( DRAW_PIPE_RESET_STIPPLE |                      \
 269                   DRAW_PIPE_EDGE_FLAG_0 |                        \
 270                   DRAW_PIPE_EDGE_FLAG_2 ),                       \
 271                 verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK),  \
 272                 verts + stride * (i1),                           \
 273                 verts + stride * (i3));                          \
 274    do_triangle( draw,                                            \
 275                 ( DRAW_PIPE_EDGE_FLAG_0 |                        \
 276                   DRAW_PIPE_EDGE_FLAG_1 ),                       \
 277                 verts + stride * ((i1) & ~DRAW_PIPE_FLAG_MASK),  \
 278                 verts + stride * (i2),                           \
 279                 verts + stride * (i3))
 280
 281 #define TRIANGLE(flags,i0,i1,i2)                                 \
 282    do_triangle( draw,                                            \
 283                 flags,  /* flags */                              \
 284                 verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK),  \
 285                 verts + stride * (i1),                           \
 286                 verts + stride * (i2))
 287
 288 #define LINE(flags,i0,i1)                                   \
 289    do_line( draw,                                           \
 290             flags,                                          \
 291             verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK), \
 292             verts + stride * (i1))
 293
 294 #define POINT(i0)                               \
 295    do_point( draw,                              \
 296              verts + stride * i0 )
 297
 298 #define FUNC pipe_run_linear
 299 #define ARGS                                    \
 300     struct draw_context *draw,                  \
 301     unsigned prim,                              \
 302     struct vertex_header *vertices,             \
 303     unsigned stride
 304
 305 #define LOCAL_VARS                                           \
 306    char *verts = (char *)vertices;                           \
 307    boolean flatfirst = (draw->rasterizer->flatshade &&       \
 308                         draw->rasterizer->flatshade_first);  \
 309    unsigned i;                                               \
 310    ushort flags
 311
 312 #define FLUSH
 313
 314 #include "draw_pt_decompose.h"
 315
 316
 317 /*
 318  * For drawing non-indexed primitives.
 319  */
 320 void draw_pipeline_run_linear( struct draw_context *draw,
 321                                unsigned prim,
 322                                struct vertex_header *vertices,
 323                                unsigned count,
 324                                unsigned stride )
 325 {
 326    char *verts = (char *)vertices;
 327    draw->pipeline.verts = verts;
 328    draw->pipeline.vertex_stride = stride;
 329    draw->pipeline.vertex_count = count;
 330
 331    pipe_run_linear(draw, prim, vertices, stride, count);
 332
 333    draw->pipeline.verts = NULL;
 334    draw->pipeline.vertex_count = 0;
 335 }
 336
 337
 338 void draw_pipeline_flush( struct draw_context *draw,
 339                           unsigned flags )
 340 {
 341    draw->pipeline.first->flush( draw->pipeline.first, flags );
 342    draw->pipeline.first = draw->pipeline.validate;
 343 }