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.rasterize)
 107       draw->pipeline.rasterize->destroy( draw->pipeline.rasterize );
 108    tgsi_exec_machine_free_data(&draw->machine);
 109    align_free( draw->vcache.vertex[0] ); /* Frees all the vertices. */
 110    FREE( draw );
 111 }
 112
 113
 114
 115 void draw_flush( struct draw_context *draw )
 116 {
 117    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 118 }
 119
 120
 121
 122 /**
 123  * Register new primitive rasterization/rendering state.
 124  * This causes the drawing pipeline to be rebuilt.
 125  */
 126 void draw_set_rasterizer_state( struct draw_context *draw,
 127                                 const struct pipe_rasterizer_state *raster )
 128 {
 129    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 130
 131    draw->rasterizer = raster;
 132 }
 133
 134
 135 /**
 136  * Plug in the primitive rendering/rasterization stage (which is the last
 137  * stage in the drawing pipeline).
 138  * This is provided by the device driver.
 139  */
 140 void draw_set_rasterize_stage( struct draw_context *draw,
 141                                struct draw_stage *stage )
 142 {
 143    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 144
 145    draw->pipeline.rasterize = stage;
 146 }
 147
 148
 149 /**
 150  * Set the draw module's clipping state.
 151  */
 152 void draw_set_clip_state( struct draw_context *draw,
 153                           const struct pipe_clip_state *clip )
 154 {
 155    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 156
 157    assert(clip->nr <= PIPE_MAX_CLIP_PLANES);
 158    memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0]));
 159    draw->nr_planes = 6 + clip->nr;
 160 }
 161
 162
 163 /**
 164  * Set the draw module's viewport state.
 165  */
 166 void draw_set_viewport_state( struct draw_context *draw,
 167                               const struct pipe_viewport_state *viewport )
 168 {
 169    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 170    draw->viewport = *viewport; /* struct copy */
 171 }
 172
 173
 174
 175 void
 176 draw_set_vertex_buffer(struct draw_context *draw,
 177                        unsigned attr,
 178                        const struct pipe_vertex_buffer *buffer)
 179 {
 180    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 181    assert(attr < PIPE_ATTRIB_MAX);
 182    draw->vertex_buffer[attr] = *buffer;
 183 }
 184
 185
 186 void
 187 draw_set_vertex_element(struct draw_context *draw,
 188                         unsigned attr,
 189                         const struct pipe_vertex_element *element)
 190 {
 191    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 192    assert(attr < PIPE_ATTRIB_MAX);
 193    draw->vertex_element[attr] = *element;
 194 }
 195
 196
 197 /**
 198  * Tell drawing context where to find mapped vertex buffers.
 199  */
 200 void
 201 draw_set_mapped_vertex_buffer(struct draw_context *draw,
 202                               unsigned attr, const void *buffer)
 203 {
 204    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 205    draw->user.vbuffer[attr] = buffer;
 206 }
 207
 208
 209 void
 210 draw_set_mapped_constant_buffer(struct draw_context *draw,
 211                                 const void *buffer)
 212 {
 213    draw_do_flush( draw, DRAW_FLUSH_VERTEX_CACHE/*STATE_CHANGE*/ );
 214    draw->user.constants = buffer;
 215 }
 216
 217
 218 /**
 219  * Tells the draw module whether to convert wide points (size != 1)
 220  * into triangles.
 221  */
 222 void
 223 draw_convert_wide_points(struct draw_context *draw, boolean enable)
 224 {
 225    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 226    draw->convert_wide_points = enable;
 227 }
 228
 229
 230 /**
 231  * Tells the draw module whether to convert wide lines (width != 1)
 232  * into triangles.
 233  */
 234 void
 235 draw_convert_wide_lines(struct draw_context *draw, boolean enable)
 236 {
 237    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 238    draw->convert_wide_lines = enable;
 239 }
 240
 241
 242 /**
 243  * Allocate space for temporary post-transform vertices, such as for clipping.
 244  */
 245 void draw_alloc_temp_verts( struct draw_stage *stage, unsigned nr )
 246 {
 247    assert(!stage->tmp);
 248
 249    stage->nr_tmps = nr;
 250
 251    if (nr) {
 252       ubyte *store = (ubyte *) MALLOC( MAX_VERTEX_SIZE * nr );
 253       unsigned i;
 254
 255       stage->tmp = (struct vertex_header **) MALLOC( sizeof(struct vertex_header *) * nr );
 256
 257       for (i = 0; i < nr; i++)
 258          stage->tmp[i] = (struct vertex_header *)(store + i * MAX_VERTEX_SIZE);
 259    }
 260 }
 261
 262
 263 void draw_free_temp_verts( struct draw_stage *stage )
 264 {
 265    if (stage->tmp) {
 266       FREE( stage->tmp[0] );
 267       FREE( stage->tmp );
 268       stage->tmp = NULL;
 269    }
 270 }
 271
 272
 273 boolean draw_use_sse(struct draw_context *draw)
 274 {
 275    return (boolean) draw->use_sse;
 276 }
 277
 278
 279 void draw_reset_vertex_ids(struct draw_context *draw)
 280 {
 281    struct draw_stage *stage = draw->pipeline.first;
 282
 283    while (stage) {
 284       unsigned i;
 285
 286       for (i = 0; i < stage->nr_tmps; i++)
 287          stage->tmp[i]->vertex_id = UNDEFINED_VERTEX_ID;
 288
 289       stage = stage->next;
 290    }
 291
 292    draw_vertex_cache_reset_vertex_ids(draw);
 293 }