draw_pipe_vbuf.c revision 84a8347b9f6ef0c1b2519e9bd5fef2ce3c85afb7
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 * \file 30 * Vertex buffer drawing stage. 31 * 32 * \author Jose Fonseca <jrfonsec@tungstengraphics.com> 33 * \author Keith Whitwell <keith@tungstengraphics.com> 34 */ 35 36 37#include "util/u_debug.h" 38#include "util/u_math.h" 39#include "util/u_memory.h" 40 41#include "draw_vbuf.h" 42#include "draw_private.h" 43#include "draw_vertex.h" 44#include "draw_pipe.h" 45#include "translate/translate.h" 46#include "translate/translate_cache.h" 47 48 49/** 50 * Vertex buffer emit stage. 51 */ 52struct vbuf_stage { 53 struct draw_stage stage; /**< This must be first (base class) */ 54 55 struct vbuf_render *render; 56 57 const struct vertex_info *vinfo; 58 59 /** Vertex size in bytes */ 60 unsigned vertex_size; 61 62 struct translate *translate; 63 64 /* FIXME: we have no guarantee that 'unsigned' is 32bit */ 65 66 /** Vertices in hardware format */ 67 unsigned *vertices; 68 unsigned *vertex_ptr; 69 unsigned max_vertices; 70 unsigned nr_vertices; 71 72 /** Indices */ 73 ushort *indices; 74 unsigned max_indices; 75 unsigned nr_indices; 76 77 /* Cache point size somewhere it's address won't change: 78 */ 79 float point_size; 80 81 struct translate_cache *cache; 82}; 83 84 85/** 86 * Basically a cast wrapper. 87 */ 88static INLINE struct vbuf_stage * 89vbuf_stage( struct draw_stage *stage ) 90{ 91 assert(stage); 92 return (struct vbuf_stage *)stage; 93} 94 95 96static void vbuf_flush_vertices( struct vbuf_stage *vbuf ); 97static void vbuf_alloc_vertices( struct vbuf_stage *vbuf ); 98 99 100static INLINE boolean 101overflow( void *map, void *ptr, unsigned bytes, unsigned bufsz ) 102{ 103 unsigned long used = (unsigned long) ((char *)ptr - (char *)map); 104 return (used + bytes) > bufsz; 105} 106 107 108static INLINE void 109check_space( struct vbuf_stage *vbuf, unsigned nr ) 110{ 111 if (vbuf->nr_vertices + nr > vbuf->max_vertices || 112 vbuf->nr_indices + nr > vbuf->max_indices) 113 { 114 vbuf_flush_vertices( vbuf ); 115 vbuf_alloc_vertices( vbuf ); 116 } 117} 118 119 120 121 122/** 123 * Extract the needed fields from post-transformed vertex and emit 124 * a hardware(driver) vertex. 125 * Recall that the vertices are constructed by the 'draw' module and 126 * have a couple of slots at the beginning (1-dword header, 4-dword 127 * clip pos) that we ignore here. We only use the vertex->data[] fields. 128 */ 129static INLINE ushort 130emit_vertex( struct vbuf_stage *vbuf, 131 struct vertex_header *vertex ) 132{ 133 if(vertex->vertex_id == UNDEFINED_VERTEX_ID) { 134 /* Hmm - vertices are emitted one at a time - better make sure 135 * set_buffer is efficient. Consider a special one-shot mode for 136 * translate. 137 */ 138 /* Note: we really do want data[0] here, not data[pos]: 139 */ 140 vbuf->translate->set_buffer(vbuf->translate, 0, vertex->data[0], 0); 141 vbuf->translate->run(vbuf->translate, 0, 1, 0, vbuf->vertex_ptr); 142 143 if (0) draw_dump_emitted_vertex(vbuf->vinfo, (uint8_t *)vbuf->vertex_ptr); 144 145 vbuf->vertex_ptr += vbuf->vertex_size/4; 146 vertex->vertex_id = vbuf->nr_vertices++; 147 } 148 149 return (ushort)vertex->vertex_id; 150} 151 152 153static void 154vbuf_tri( struct draw_stage *stage, 155 struct prim_header *prim ) 156{ 157 struct vbuf_stage *vbuf = vbuf_stage( stage ); 158 unsigned i; 159 160 check_space( vbuf, 3 ); 161 162 if (vbuf->stage.draw->rasterizer->flatshade_first) { 163 /* Put provoking vertex in position expected by the driver. 164 * Emit last provoking vertex in first pos. 165 * Swap verts 0 & 1 to preserve polygon winding. 166 */ 167 vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[2] ); 168 vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[0] ); 169 vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[1] ); 170 } 171 else { 172 for (i = 0; i < 3; i++) { 173 vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] ); 174 } 175 } 176} 177 178 179static void 180vbuf_line( struct draw_stage *stage, 181 struct prim_header *prim ) 182{ 183 struct vbuf_stage *vbuf = vbuf_stage( stage ); 184 unsigned i; 185 186 check_space( vbuf, 2 ); 187 188 for (i = 0; i < 2; i++) { 189 vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[i] ); 190 } 191} 192 193 194static void 195vbuf_point( struct draw_stage *stage, 196 struct prim_header *prim ) 197{ 198 struct vbuf_stage *vbuf = vbuf_stage( stage ); 199 200 check_space( vbuf, 1 ); 201 202 vbuf->indices[vbuf->nr_indices++] = emit_vertex( vbuf, prim->v[0] ); 203} 204 205 206 207 208/** 209 * Set the prim type for subsequent vertices. 210 * This may result in a new vertex size. The existing vbuffer (if any) 211 * will be flushed if needed and a new one allocated. 212 */ 213static void 214vbuf_start_prim( struct vbuf_stage *vbuf, uint prim ) 215{ 216 struct translate_key hw_key; 217 unsigned dst_offset; 218 unsigned i; 219 220 vbuf->render->set_primitive(vbuf->render, prim); 221 222 /* Must do this after set_primitive() above: 223 * 224 * XXX: need some state managment to track when this needs to be 225 * recalculated. The driver should tell us whether there was a 226 * state change. 227 */ 228 vbuf->vinfo = vbuf->render->get_vertex_info(vbuf->render); 229 vbuf->vertex_size = vbuf->vinfo->size * sizeof(float); 230 231 /* Translate from pipeline vertices to hw vertices. 232 */ 233 dst_offset = 0; 234 235 for (i = 0; i < vbuf->vinfo->num_attribs; i++) { 236 unsigned emit_sz = 0; 237 unsigned src_buffer = 0; 238 unsigned output_format; 239 unsigned src_offset = (vbuf->vinfo->attrib[i].src_index * 4 * sizeof(float) ); 240 241 output_format = draw_translate_vinfo_format(vbuf->vinfo->attrib[i].emit); 242 emit_sz = draw_translate_vinfo_size(vbuf->vinfo->attrib[i].emit); 243 244 /* doesn't handle EMIT_OMIT */ 245 assert(emit_sz != 0); 246 247 if (vbuf->vinfo->attrib[i].emit == EMIT_1F_PSIZE) { 248 src_buffer = 1; 249 src_offset = 0; 250 } 251 252 hw_key.element[i].type = TRANSLATE_ELEMENT_NORMAL; 253 hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT; 254 hw_key.element[i].input_buffer = src_buffer; 255 hw_key.element[i].input_offset = src_offset; 256 hw_key.element[i].instance_divisor = 0; 257 hw_key.element[i].output_format = output_format; 258 hw_key.element[i].output_offset = dst_offset; 259 260 dst_offset += emit_sz; 261 } 262 263 hw_key.nr_elements = vbuf->vinfo->num_attribs; 264 hw_key.output_stride = vbuf->vinfo->size * 4; 265 266 /* Don't bother with caching at this stage: 267 */ 268 if (!vbuf->translate || 269 translate_key_compare(&vbuf->translate->key, &hw_key) != 0) 270 { 271 translate_key_sanitize(&hw_key); 272 vbuf->translate = translate_cache_find(vbuf->cache, &hw_key); 273 274 vbuf->translate->set_buffer(vbuf->translate, 1, &vbuf->point_size, 0); 275 } 276 277 vbuf->point_size = vbuf->stage.draw->rasterizer->point_size; 278 279 /* Allocate new buffer? 280 */ 281 assert(vbuf->vertices == NULL); 282 vbuf_alloc_vertices(vbuf); 283} 284 285 286static void 287vbuf_first_tri( struct draw_stage *stage, 288 struct prim_header *prim ) 289{ 290 struct vbuf_stage *vbuf = vbuf_stage( stage ); 291 292 vbuf_flush_vertices( vbuf ); 293 vbuf_start_prim(vbuf, PIPE_PRIM_TRIANGLES); 294 stage->tri = vbuf_tri; 295 stage->tri( stage, prim ); 296} 297 298 299static void 300vbuf_first_line( struct draw_stage *stage, 301 struct prim_header *prim ) 302{ 303 struct vbuf_stage *vbuf = vbuf_stage( stage ); 304 305 vbuf_flush_vertices( vbuf ); 306 vbuf_start_prim(vbuf, PIPE_PRIM_LINES); 307 stage->line = vbuf_line; 308 stage->line( stage, prim ); 309} 310 311 312static void 313vbuf_first_point( struct draw_stage *stage, 314 struct prim_header *prim ) 315{ 316 struct vbuf_stage *vbuf = vbuf_stage( stage ); 317 318 vbuf_flush_vertices(vbuf); 319 vbuf_start_prim(vbuf, PIPE_PRIM_POINTS); 320 stage->point = vbuf_point; 321 stage->point( stage, prim ); 322} 323 324 325 326/** 327 * Flush existing vertex buffer and allocate a new one. 328 */ 329static void 330vbuf_flush_vertices( struct vbuf_stage *vbuf ) 331{ 332 if(vbuf->vertices) { 333 334 vbuf->render->unmap_vertices( vbuf->render, 0, vbuf->nr_vertices - 1 ); 335 336 if (vbuf->nr_indices) 337 { 338 vbuf->render->draw(vbuf->render, 339 vbuf->indices, 340 vbuf->nr_indices ); 341 342 vbuf->nr_indices = 0; 343 } 344 345 /* Reset temporary vertices ids */ 346 if(vbuf->nr_vertices) 347 draw_reset_vertex_ids( vbuf->stage.draw ); 348 349 /* Free the vertex buffer */ 350 vbuf->render->release_vertices( vbuf->render ); 351 352 vbuf->max_vertices = vbuf->nr_vertices = 0; 353 vbuf->vertex_ptr = vbuf->vertices = NULL; 354 } 355} 356 357 358static void 359vbuf_alloc_vertices( struct vbuf_stage *vbuf ) 360{ 361 assert(!vbuf->nr_indices); 362 assert(!vbuf->vertices); 363 364 /* Allocate a new vertex buffer */ 365 vbuf->max_vertices = vbuf->render->max_vertex_buffer_bytes / vbuf->vertex_size; 366 367 /* even number */ 368 vbuf->max_vertices = vbuf->max_vertices & ~1; 369 370 if(vbuf->max_vertices >= UNDEFINED_VERTEX_ID) 371 vbuf->max_vertices = UNDEFINED_VERTEX_ID - 1; 372 373 /* Must always succeed -- driver gives us a 374 * 'max_vertex_buffer_bytes' which it guarantees it can allocate, 375 * and it will flush itself if necessary to do so. If this does 376 * fail, we are basically without usable hardware. 377 */ 378 vbuf->render->allocate_vertices(vbuf->render, 379 (ushort) vbuf->vertex_size, 380 (ushort) vbuf->max_vertices); 381 382 vbuf->vertices = (uint *) vbuf->render->map_vertices( vbuf->render ); 383 384 vbuf->vertex_ptr = vbuf->vertices; 385} 386 387 388 389static void 390vbuf_flush( struct draw_stage *stage, unsigned flags ) 391{ 392 struct vbuf_stage *vbuf = vbuf_stage( stage ); 393 394 vbuf_flush_vertices( vbuf ); 395 396 stage->point = vbuf_first_point; 397 stage->line = vbuf_first_line; 398 stage->tri = vbuf_first_tri; 399} 400 401 402static void 403vbuf_reset_stipple_counter( struct draw_stage *stage ) 404{ 405 /* XXX: Need to do something here for hardware with linestipple. 406 */ 407 (void) stage; 408} 409 410 411static void vbuf_destroy( struct draw_stage *stage ) 412{ 413 struct vbuf_stage *vbuf = vbuf_stage( stage ); 414 415 if(vbuf->indices) 416 align_free( vbuf->indices ); 417 418 if (vbuf->render) 419 vbuf->render->destroy( vbuf->render ); 420 421 if (vbuf->cache) 422 translate_cache_destroy(vbuf->cache); 423 424 FREE( stage ); 425} 426 427 428/** 429 * Create a new primitive vbuf/render stage. 430 */ 431struct draw_stage *draw_vbuf_stage( struct draw_context *draw, 432 struct vbuf_render *render ) 433{ 434 struct vbuf_stage *vbuf = CALLOC_STRUCT(vbuf_stage); 435 if (vbuf == NULL) 436 goto fail; 437 438 vbuf->stage.draw = draw; 439 vbuf->stage.name = "vbuf"; 440 vbuf->stage.point = vbuf_first_point; 441 vbuf->stage.line = vbuf_first_line; 442 vbuf->stage.tri = vbuf_first_tri; 443 vbuf->stage.flush = vbuf_flush; 444 vbuf->stage.reset_stipple_counter = vbuf_reset_stipple_counter; 445 vbuf->stage.destroy = vbuf_destroy; 446 447 vbuf->render = render; 448 vbuf->max_indices = MAX2(render->max_indices, UNDEFINED_VERTEX_ID-1); 449 450 vbuf->indices = (ushort *) align_malloc( vbuf->max_indices * 451 sizeof(vbuf->indices[0]), 452 16 ); 453 if (!vbuf->indices) 454 goto fail; 455 456 vbuf->cache = translate_cache_create(); 457 if (!vbuf->cache) 458 goto fail; 459 460 461 vbuf->vertices = NULL; 462 vbuf->vertex_ptr = vbuf->vertices; 463 464 return &vbuf->stage; 465 466 fail: 467 if (vbuf) 468 vbuf_destroy(&vbuf->stage); 469 470 return NULL; 471} 472