src/mesa/pipe/draw/draw_context.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
  34 #include "pipe/p_util.h"
  35 #include "draw_context.h"
  36 #include "draw_private.h"
  37
  38
  39
  40 struct draw_context *draw_create( void )
  41 {
  42    struct draw_context *draw = CALLOC_STRUCT( draw_context );
  43
  44 #if defined(__i386__) || defined(__386__)
  45    draw->use_sse = GETENV( "GALLIUM_NOSSE" ) == NULL;
  46 #else
  47    draw->use_sse = FALSE;
  48 #endif
  49
  50    /* create pipeline stages */
  51    draw->pipeline.wide      = draw_wide_stage( draw );
  52    draw->pipeline.stipple   = draw_stipple_stage( draw );
  53    draw->pipeline.unfilled  = draw_unfilled_stage( draw );
  54    draw->pipeline.twoside   = draw_twoside_stage( draw );
  55    draw->pipeline.offset    = draw_offset_stage( draw );
  56    draw->pipeline.clip      = draw_clip_stage( draw );
  57    draw->pipeline.flatshade = draw_flatshade_stage( draw );
  58    draw->pipeline.cull      = draw_cull_stage( draw );
  59    draw->pipeline.validate  = draw_validate_stage( draw );
  60    draw->pipeline.first     = draw->pipeline.validate;
  61
  62    ASSIGN_4V( draw->plane[0], -1,  0,  0, 1 );
  63    ASSIGN_4V( draw->plane[1],  1,  0,  0, 1 );
  64    ASSIGN_4V( draw->plane[2],  0, -1,  0, 1 );
  65    ASSIGN_4V( draw->plane[3],  0,  1,  0, 1 );
  66    ASSIGN_4V( draw->plane[4],  0,  0,  1, 1 ); /* yes these are correct */
  67    ASSIGN_4V( draw->plane[5],  0,  0, -1, 1 ); /* mesa's a bit wonky */
  68    draw->nr_planes = 6;
  69
  70    /* Statically allocate maximum sized vertices for the cache - could be cleverer...
  71     */
  72    {
  73       uint i;
  74       const unsigned size = (MAX_VERTEX_SIZE + 0x0f) & ~0x0f;
  75       char *tmp = align_malloc(Elements(draw->vcache.vertex) * size, 16);
  76
  77       for (i = 0; i < Elements(draw->vcache.vertex); i++)
  78          draw->vcache.vertex[i] = (struct vertex_header *)(tmp + i * size);
  79    }
  80
  81    draw->convert_wide_points = TRUE;
  82    draw->convert_wide_lines = TRUE;
  83
  84    draw->reduced_prim = ~0; /* != any of PIPE_PRIM_x */
  85
  86    draw_vertex_cache_invalidate( draw );
  87    draw_set_mapped_element_buffer( draw, 0, NULL );
  88
  89    return draw;
  90 }
  91
  92
  93 void draw_destroy( struct draw_context *draw )
  94 {
  95    draw->pipeline.wide->destroy( draw->pipeline.wide );
  96    draw->pipeline.stipple->destroy( draw->pipeline.stipple );
  97    draw->pipeline.unfilled->destroy( draw->pipeline.unfilled );
  98    draw->pipeline.twoside->destroy( draw->pipeline.twoside );
  99    draw->pipeline.offset->destroy( draw->pipeline.offset );
 100    draw->pipeline.clip->destroy( draw->pipeline.clip );
 101    draw->pipeline.flatshade->destroy( draw->pipeline.flatshade );
 102    draw->pipeline.cull->destroy( draw->pipeline.cull );
 103    draw->pipeline.validate->destroy( draw->pipeline.validate );
 104    if (draw->pipeline.rasterize)
 105       draw->pipeline.rasterize->destroy( draw->pipeline.rasterize );
 106    tgsi_exec_machine_free_data(&draw->machine);
 107    FREE( draw->vcache.vertex[0] ); /* Frees all the vertices. */
 108    FREE( draw );
 109 }
 110
 111
 112
 113 void draw_flush( struct draw_context *draw )
 114 {
 115    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 116 }
 117
 118
 119
 120 /**
 121  * Register new primitive rasterization/rendering state.
 122  * This causes the drawing pipeline to be rebuilt.
 123  */
 124 void draw_set_rasterizer_state( struct draw_context *draw,
 125                                 const struct pipe_rasterizer_state *raster )
 126 {
 127    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 128
 129    draw->rasterizer = raster;
 130 }
 131
 132
 133 /**
 134  * Plug in the primitive rendering/rasterization stage (which is the last
 135  * stage in the drawing pipeline).
 136  * This is provided by the device driver.
 137  */
 138 void draw_set_rasterize_stage( struct draw_context *draw,
 139                                struct draw_stage *stage )
 140 {
 141    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 142
 143    draw->pipeline.rasterize = stage;
 144 }
 145
 146
 147 /**
 148  * Set the draw module's clipping state.
 149  */
 150 void draw_set_clip_state( struct draw_context *draw,
 151                           const struct pipe_clip_state *clip )
 152 {
 153    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 154
 155    assert(clip->nr <= PIPE_MAX_CLIP_PLANES);
 156    memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0]));
 157    draw->nr_planes = 6 + clip->nr;
 158 }
 159
 160
 161 /**
 162  * Set the draw module's viewport state.
 163  */
 164 void draw_set_viewport_state( struct draw_context *draw,
 165                               const struct pipe_viewport_state *viewport )
 166 {
 167    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 168    draw->viewport = *viewport; /* struct copy */
 169 }
 170
 171
 172
 173 void
 174 draw_set_vertex_buffer(struct draw_context *draw,
 175                        unsigned attr,
 176                        const struct pipe_vertex_buffer *buffer)
 177 {
 178    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 179    assert(attr < PIPE_ATTRIB_MAX);
 180    draw->vertex_buffer[attr] = *buffer;
 181 }
 182
 183
 184 void
 185 draw_set_vertex_element(struct draw_context *draw,
 186                         unsigned attr,
 187                         const struct pipe_vertex_element *element)
 188 {
 189    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 190    assert(attr < PIPE_ATTRIB_MAX);
 191    draw->vertex_element[attr] = *element;
 192 }
 193
 194
 195 /**
 196  * Tell drawing context where to find mapped vertex buffers.
 197  */
 198 void
 199 draw_set_mapped_vertex_buffer(struct draw_context *draw,
 200                               unsigned attr, const void *buffer)
 201 {
 202    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 203    draw->user.vbuffer[attr] = buffer;
 204 }
 205
 206
 207 void
 208 draw_set_mapped_constant_buffer(struct draw_context *draw,
 209                                 const void *buffer)
 210 {
 211    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 212    draw->user.constants = buffer;
 213 }
 214
 215
 216 /**
 217  * Tells the draw module whether to convert wide points (size != 1)
 218  * into triangles.
 219  */
 220 void
 221 draw_convert_wide_points(struct draw_context *draw, boolean enable)
 222 {
 223    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 224    draw->convert_wide_points = enable;
 225 }
 226
 227
 228 /**
 229  * Tells the draw module whether to convert wide lines (width != 1)
 230  * into triangles.
 231  */
 232 void
 233 draw_convert_wide_lines(struct draw_context *draw, boolean enable)
 234 {
 235    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 236    draw->convert_wide_lines = enable;
 237 }
 238
 239
 240 /**
 241  * Allocate space for temporary post-transform vertices, such as for clipping.
 242  */
 243 void draw_alloc_tmps( struct draw_stage *stage, unsigned nr )
 244 {
 245    assert(!stage->tmp);
 246
 247    stage->nr_tmps = nr;
 248
 249    if (nr) {
 250       ubyte *store = (ubyte *) MALLOC( MAX_VERTEX_SIZE * nr );
 251       unsigned i;
 252
 253       stage->tmp = (struct vertex_header **) MALLOC( sizeof(struct vertex_header *) * nr );
 254
 255       for (i = 0; i < nr; i++)
 256          stage->tmp[i] = (struct vertex_header *)(store + i * MAX_VERTEX_SIZE);
 257    }
 258 }
 259
 260
 261 void draw_free_tmps( struct draw_stage *stage )
 262 {
 263    if (stage->tmp) {
 264       FREE( stage->tmp[0] );
 265       FREE( stage->tmp );
 266       stage->tmp = NULL;
 267    }
 268 }
 269
 270
 271 boolean draw_use_sse(struct draw_context *draw)
 272 {
 273    return (boolean) draw->use_sse;
 274 }
 275
 276
 277 void draw_reset_vertex_ids(struct draw_context *draw)
 278 {
 279    struct draw_stage *stage = draw->pipeline.first;
 280
 281    while (stage) {
 282       unsigned i;
 283
 284       for (i = 0; i < stage->nr_tmps; i++)
 285          stage->tmp[i]->vertex_id = UNDEFINED_VERTEX_ID;
 286
 287       stage = stage->next;
 288    }
 289
 290    draw_vertex_cache_reset_vertex_ids(draw);
 291 }