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