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 #define QUAD(i0,i1,i2,i3)                       \
 162    do_triangle( draw,                           \
 163                 ( DRAW_PIPE_RESET_STIPPLE |     \
 164                   DRAW_PIPE_EDGE_FLAG_0 |       \
 165                   DRAW_PIPE_EDGE_FLAG_2 ),      \
 166                 verts + stride * elts[i0],      \
 167                 verts + stride * elts[i1],      \
 168                 verts + stride * elts[i3]);     \
 169    do_triangle( draw,                           \
 170                 ( DRAW_PIPE_EDGE_FLAG_0 |       \
 171                   DRAW_PIPE_EDGE_FLAG_1 ),      \
 172                 verts + stride * elts[i1],      \
 173                 verts + stride * elts[i2],      \
 174                 verts + stride * elts[i3])
 175
 176 #define TRIANGLE(flags,i0,i1,i2)                                        \
 177    do_triangle( draw,                                                   \
 178                 elts[i0],  /* flags */                          \
 179                 verts + stride * (elts[i0] & ~DRAW_PIPE_FLAG_MASK),     \
 180                 verts + stride * elts[i1],                              \
 181                 verts + stride * elts[i2])
 182
 183 #define LINE(flags,i0,i1)                                       \
 184    do_line( draw,                                               \
 185             elts[i0],                                   \
 186             verts + stride * (elts[i0] & ~DRAW_PIPE_FLAG_MASK), \
 187             verts + stride * elts[i1])
 188
 189 #define POINT(i0)                               \
 190    do_point( draw,                              \
 191              verts + stride * elts[i0] )
 192
 193 #define FUNC pipe_run
 194 #define ARGS                                    \
 195     struct draw_context *draw,                  \
 196     unsigned prim,                              \
 197     struct vertex_header *vertices,             \
 198     unsigned stride,                            \
 199     const ushort *elts
 200
 201 #define LOCAL_VARS                                           \
 202    char *verts = (char *)vertices;                           \
 203    boolean flatfirst = (draw->rasterizer->flatshade &&       \
 204                         draw->rasterizer->flatshade_first);  \
 205    unsigned i;                                               \
 206    ushort flags
 207
 208 #define FLUSH
 209
 210 #include "draw_pt_decompose.h"
 211 #undef ARGS
 212 #undef LOCAL_VARS
 213
 214
 215
 216 /* Code to run the pipeline on a fairly arbitary collection of vertices.
 217  *
 218  * Vertex headers must be pre-initialized with the
 219  * UNDEFINED_VERTEX_ID, this code will cause that id to become
 220  * overwritten, so it may have to be reset if there is the intention
 221  * to reuse the vertices.
 222  *
 223  * This code provides a callback to reset the vertex id's which the
 224  * draw_vbuf.c code uses when it has to perform a flush.
 225  */
 226 void draw_pipeline_run( struct draw_context *draw,
 227                         unsigned prim,
 228                         struct vertex_header *vertices,
 229                         unsigned vertex_count,
 230                         unsigned stride,
 231                         const ushort *elts,
 232                         unsigned count )
 233 {
 234    char *verts = (char *)vertices;
 235
 236    draw->pipeline.verts = verts;
 237    draw->pipeline.vertex_stride = stride;
 238    draw->pipeline.vertex_count = vertex_count;
 239
 240    pipe_run(draw, prim, vertices, stride, elts, count);
 241
 242    draw->pipeline.verts = NULL;
 243    draw->pipeline.vertex_count = 0;
 244 }
 245
 246 #define QUAD(i0,i1,i2,i3)                                        \
 247    do_triangle( draw,                                            \
 248                 ( DRAW_PIPE_RESET_STIPPLE |                      \
 249                   DRAW_PIPE_EDGE_FLAG_0 |                        \
 250                   DRAW_PIPE_EDGE_FLAG_2 ),                       \
 251                 verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK),  \
 252                 verts + stride * (i1),                           \
 253                 verts + stride * (i3));                          \
 254    do_triangle( draw,                                            \
 255                 ( DRAW_PIPE_EDGE_FLAG_0 |                        \
 256                   DRAW_PIPE_EDGE_FLAG_1 ),                       \
 257                 verts + stride * ((i1) & ~DRAW_PIPE_FLAG_MASK),  \
 258                 verts + stride * (i2),                           \
 259                 verts + stride * (i3))
 260
 261 #define TRIANGLE(flags,i0,i1,i2)                                 \
 262    do_triangle( draw,                                            \
 263                 flags,  /* flags */                              \
 264                 verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK),  \
 265                 verts + stride * (i1),                           \
 266                 verts + stride * (i2))
 267
 268 #define LINE(flags,i0,i1)                                   \
 269    do_line( draw,                                           \
 270             flags,                                          \
 271             verts + stride * ((i0) & ~DRAW_PIPE_FLAG_MASK), \
 272             verts + stride * (i1))
 273
 274 #define POINT(i0)                               \
 275    do_point( draw,                              \
 276              verts + stride * i0 )
 277
 278 #define FUNC pipe_run_linear
 279 #define ARGS                                    \
 280     struct draw_context *draw,                  \
 281     unsigned prim,                              \
 282     struct vertex_header *vertices,             \
 283     unsigned stride
 284
 285 #define LOCAL_VARS                                           \
 286    char *verts = (char *)vertices;                           \
 287    boolean flatfirst = (draw->rasterizer->flatshade &&       \
 288                         draw->rasterizer->flatshade_first);  \
 289    unsigned i;                                               \
 290    ushort flags
 291
 292 #define FLUSH
 293
 294 #include "draw_pt_decompose.h"
 295
 296 void draw_pipeline_run_linear( struct draw_context *draw,
 297                                unsigned prim,
 298                                struct vertex_header *vertices,
 299                                unsigned count,
 300                                unsigned stride )
 301 {
 302    char *verts = (char *)vertices;
 303    draw->pipeline.verts = verts;
 304    draw->pipeline.vertex_stride = stride;
 305    draw->pipeline.vertex_count = count;
 306
 307    pipe_run_linear(draw, prim, vertices, stride, count);
 308
 309    draw->pipeline.verts = NULL;
 310    draw->pipeline.vertex_count = 0;
 311 }
 312
 313
 314 void draw_pipeline_flush( struct draw_context *draw,
 315                           unsigned flags )
 316 {
 317    draw->pipeline.first->flush( draw->pipeline.first, flags );
 318    draw->pipeline.first = draw->pipeline.validate;
 319 }