src/gallium/auxiliary/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->shader_queue_flush = draw_vertex_shader_queue_flush;
  82
  83    draw->convert_wide_points = TRUE;
  84    draw->convert_wide_lines = TRUE;
  85
  86    draw->reduced_prim = ~0; /* != any of PIPE_PRIM_x */
  87
  88    draw_vertex_cache_invalidate( draw );
  89    draw_set_mapped_element_buffer( draw, 0, NULL );
  90
  91    return draw;
  92 }
  93
  94
  95 void draw_destroy( struct draw_context *draw )
  96 {
  97    draw->pipeline.wide->destroy( draw->pipeline.wide );
  98    draw->pipeline.stipple->destroy( draw->pipeline.stipple );
  99    draw->pipeline.unfilled->destroy( draw->pipeline.unfilled );
 100    draw->pipeline.twoside->destroy( draw->pipeline.twoside );
 101    draw->pipeline.offset->destroy( draw->pipeline.offset );
 102    draw->pipeline.clip->destroy( draw->pipeline.clip );
 103    draw->pipeline.flatshade->destroy( draw->pipeline.flatshade );
 104    draw->pipeline.cull->destroy( draw->pipeline.cull );
 105    draw->pipeline.validate->destroy( draw->pipeline.validate );
 106    if (draw->pipeline.aaline)
 107       draw->pipeline.aaline->destroy( draw->pipeline.aaline );
 108    if (draw->pipeline.rasterize)
 109       draw->pipeline.rasterize->destroy( draw->pipeline.rasterize );
 110    tgsi_exec_machine_free_data(&draw->machine);
 111    align_free( draw->vcache.vertex[0] ); /* Frees all the vertices. */
 112    FREE( draw );
 113 }
 114
 115
 116
 117 void draw_flush( struct draw_context *draw )
 118 {
 119    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 120 }
 121
 122
 123
 124 /**
 125  * Register new primitive rasterization/rendering state.
 126  * This causes the drawing pipeline to be rebuilt.
 127  */
 128 void draw_set_rasterizer_state( struct draw_context *draw,
 129                                 const struct pipe_rasterizer_state *raster )
 130 {
 131    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 132
 133    draw->rasterizer = raster;
 134 }
 135
 136
 137 /**
 138  * Plug in the primitive rendering/rasterization stage (which is the last
 139  * stage in the drawing pipeline).
 140  * This is provided by the device driver.
 141  */
 142 void draw_set_rasterize_stage( struct draw_context *draw,
 143                                struct draw_stage *stage )
 144 {
 145    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 146
 147    draw->pipeline.rasterize = stage;
 148 }
 149
 150
 151 /**
 152  * Set the draw module's clipping state.
 153  */
 154 void draw_set_clip_state( struct draw_context *draw,
 155                           const struct pipe_clip_state *clip )
 156 {
 157    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 158
 159    assert(clip->nr <= PIPE_MAX_CLIP_PLANES);
 160    memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0]));
 161    draw->nr_planes = 6 + clip->nr;
 162 }
 163
 164
 165 /**
 166  * Set the draw module's viewport state.
 167  */
 168 void draw_set_viewport_state( struct draw_context *draw,
 169                               const struct pipe_viewport_state *viewport )
 170 {
 171    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 172    draw->viewport = *viewport; /* struct copy */
 173 }
 174
 175
 176
 177 void
 178 draw_set_vertex_buffer(struct draw_context *draw,
 179                        unsigned attr,
 180                        const struct pipe_vertex_buffer *buffer)
 181 {
 182    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 183    assert(attr < PIPE_ATTRIB_MAX);
 184    draw->vertex_buffer[attr] = *buffer;
 185 }
 186
 187
 188 void
 189 draw_set_vertex_element(struct draw_context *draw,
 190                         unsigned attr,
 191                         const struct pipe_vertex_element *element)
 192 {
 193    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 194    assert(attr < PIPE_ATTRIB_MAX);
 195    draw->vertex_element[attr] = *element;
 196 }
 197
 198
 199 /**
 200  * Tell drawing context where to find mapped vertex buffers.
 201  */
 202 void
 203 draw_set_mapped_vertex_buffer(struct draw_context *draw,
 204                               unsigned attr, const void *buffer)
 205 {
 206    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 207    draw->user.vbuffer[attr] = buffer;
 208 }
 209
 210
 211 void
 212 draw_set_mapped_constant_buffer(struct draw_context *draw,
 213                                 const void *buffer)
 214 {
 215    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 216    draw->user.constants = buffer;
 217 }
 218
 219
 220 /**
 221  * Tells the draw module whether to convert wide points (size != 1)
 222  * into triangles.
 223  */
 224 void
 225 draw_convert_wide_points(struct draw_context *draw, boolean enable)
 226 {
 227    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 228    draw->convert_wide_points = enable;
 229 }
 230
 231
 232 /**
 233  * Tells the draw module whether to convert wide lines (width != 1)
 234  * into triangles.
 235  */
 236 void
 237 draw_convert_wide_lines(struct draw_context *draw, boolean enable)
 238 {
 239    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 240    draw->convert_wide_lines = enable;
 241 }
 242
 243
 244 /**
 245  * The draw module may sometimes generate vertices with extra attributes
 246  * (such as texcoords for AA lines).  The driver can call this function
 247  * to find those attributes.
 248  */
 249 int
 250 draw_find_vs_output(struct draw_context *draw,
 251                     uint semantic_name, uint semantic_index)
 252 {
 253    /* XXX there may be more than one extra vertex attrib.
 254     * For example, simulated gl_FragCoord and gl_PointCoord.
 255     */
 256    if (draw->extra_vp_outputs.semantic_name == semantic_name &&
 257        draw->extra_vp_outputs.semantic_index == semantic_index) {
 258       return draw->extra_vp_outputs.slot;
 259    }
 260    return 0;
 261 }
 262
 263
 264 /**
 265  * Allocate space for temporary post-transform vertices, such as for clipping.
 266  */
 267 void draw_alloc_temp_verts( struct draw_stage *stage, unsigned nr )
 268 {
 269    assert(!stage->tmp);
 270
 271    stage->nr_tmps = nr;
 272
 273    if (nr) {
 274       ubyte *store = (ubyte *) MALLOC( MAX_VERTEX_SIZE * nr );
 275       unsigned i;
 276
 277       stage->tmp = (struct vertex_header **) MALLOC( sizeof(struct vertex_header *) * nr );
 278
 279       for (i = 0; i < nr; i++)
 280          stage->tmp[i] = (struct vertex_header *)(store + i * MAX_VERTEX_SIZE);
 281    }
 282 }
 283
 284
 285 void draw_free_temp_verts( struct draw_stage *stage )
 286 {
 287    if (stage->tmp) {
 288       FREE( stage->tmp[0] );
 289       FREE( stage->tmp );
 290       stage->tmp = NULL;
 291    }
 292 }
 293
 294
 295 boolean draw_use_sse(struct draw_context *draw)
 296 {
 297    return (boolean) draw->use_sse;
 298 }
 299
 300
 301 void draw_reset_vertex_ids(struct draw_context *draw)
 302 {
 303    struct draw_stage *stage = draw->pipeline.first;
 304
 305    while (stage) {
 306       unsigned i;
 307
 308       for (i = 0; i < stage->nr_tmps; i++)
 309          stage->tmp[i]->vertex_id = UNDEFINED_VERTEX_ID;
 310
 311       stage = stage->next;
 312    }
 313
 314    draw_vertex_cache_reset_vertex_ids(draw);
 315 }