draw_pipe_vbuf.c revision 543b9566bdaa48fea2df1866fa1310c1cdbcde27
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 switch (vbuf->vinfo->attrib[i].emit) { 242 case EMIT_4F: 243 output_format = PIPE_FORMAT_R32G32B32A32_FLOAT; 244 emit_sz = 4 * sizeof(float); 245 break; 246 case EMIT_3F: 247 output_format = PIPE_FORMAT_R32G32B32_FLOAT; 248 emit_sz = 3 * sizeof(float); 249 break; 250 case EMIT_2F: 251 output_format = PIPE_FORMAT_R32G32_FLOAT; 252 emit_sz = 2 * sizeof(float); 253 break; 254 case EMIT_1F: 255 output_format = PIPE_FORMAT_R32_FLOAT; 256 emit_sz = 1 * sizeof(float); 257 break; 258 case EMIT_1F_PSIZE: 259 output_format = PIPE_FORMAT_R32_FLOAT; 260 emit_sz = 1 * sizeof(float); 261 src_buffer = 1; 262 src_offset = 0; 263 break; 264 case EMIT_4UB: 265 output_format = PIPE_FORMAT_B8G8R8A8_UNORM; 266 emit_sz = 4 * sizeof(ubyte); 267 break; 268 default: 269 assert(0); 270 output_format = PIPE_FORMAT_NONE; 271 emit_sz = 0; 272 break; 273 } 274 275 hw_key.element[i].type = TRANSLATE_ELEMENT_NORMAL; 276 hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT; 277 hw_key.element[i].input_buffer = src_buffer; 278 hw_key.element[i].input_offset = src_offset; 279 hw_key.element[i].instance_divisor = 0; 280 hw_key.element[i].output_format = output_format; 281 hw_key.element[i].output_offset = dst_offset; 282 283 dst_offset += emit_sz; 284 } 285 286 hw_key.nr_elements = vbuf->vinfo->num_attribs; 287 hw_key.output_stride = vbuf->vinfo->size * 4; 288 289 /* Don't bother with caching at this stage: 290 */ 291 if (!vbuf->translate || 292 translate_key_compare(&vbuf->translate->key, &hw_key) != 0) 293 { 294 translate_key_sanitize(&hw_key); 295 vbuf->translate = translate_cache_find(vbuf->cache, &hw_key); 296 297 vbuf->translate->set_buffer(vbuf->translate, 1, &vbuf->point_size, 0); 298 } 299 300 vbuf->point_size = vbuf->stage.draw->rasterizer->point_size; 301 302 /* Allocate new buffer? 303 */ 304 assert(vbuf->vertices == NULL); 305 vbuf_alloc_vertices(vbuf); 306} 307 308 309static void 310vbuf_first_tri( struct draw_stage *stage, 311 struct prim_header *prim ) 312{ 313 struct vbuf_stage *vbuf = vbuf_stage( stage ); 314 315 vbuf_flush_vertices( vbuf ); 316 vbuf_start_prim(vbuf, PIPE_PRIM_TRIANGLES); 317 stage->tri = vbuf_tri; 318 stage->tri( stage, prim ); 319} 320 321 322static void 323vbuf_first_line( struct draw_stage *stage, 324 struct prim_header *prim ) 325{ 326 struct vbuf_stage *vbuf = vbuf_stage( stage ); 327 328 vbuf_flush_vertices( vbuf ); 329 vbuf_start_prim(vbuf, PIPE_PRIM_LINES); 330 stage->line = vbuf_line; 331 stage->line( stage, prim ); 332} 333 334 335static void 336vbuf_first_point( struct draw_stage *stage, 337 struct prim_header *prim ) 338{ 339 struct vbuf_stage *vbuf = vbuf_stage( stage ); 340 341 vbuf_flush_vertices(vbuf); 342 vbuf_start_prim(vbuf, PIPE_PRIM_POINTS); 343 stage->point = vbuf_point; 344 stage->point( stage, prim ); 345} 346 347 348 349/** 350 * Flush existing vertex buffer and allocate a new one. 351 */ 352static void 353vbuf_flush_vertices( struct vbuf_stage *vbuf ) 354{ 355 if(vbuf->vertices) { 356 357 vbuf->render->unmap_vertices( vbuf->render, 0, vbuf->nr_vertices - 1 ); 358 359 if (vbuf->nr_indices) 360 { 361 vbuf->render->draw(vbuf->render, 362 vbuf->indices, 363 vbuf->nr_indices ); 364 365 vbuf->nr_indices = 0; 366 } 367 368 /* Reset temporary vertices ids */ 369 if(vbuf->nr_vertices) 370 draw_reset_vertex_ids( vbuf->stage.draw ); 371 372 /* Free the vertex buffer */ 373 vbuf->render->release_vertices( vbuf->render ); 374 375 vbuf->max_vertices = vbuf->nr_vertices = 0; 376 vbuf->vertex_ptr = vbuf->vertices = NULL; 377 } 378} 379 380 381static void 382vbuf_alloc_vertices( struct vbuf_stage *vbuf ) 383{ 384 assert(!vbuf->nr_indices); 385 assert(!vbuf->vertices); 386 387 /* Allocate a new vertex buffer */ 388 vbuf->max_vertices = vbuf->render->max_vertex_buffer_bytes / vbuf->vertex_size; 389 390 /* even number */ 391 vbuf->max_vertices = vbuf->max_vertices & ~1; 392 393 if(vbuf->max_vertices >= UNDEFINED_VERTEX_ID) 394 vbuf->max_vertices = UNDEFINED_VERTEX_ID - 1; 395 396 /* Must always succeed -- driver gives us a 397 * 'max_vertex_buffer_bytes' which it guarantees it can allocate, 398 * and it will flush itself if necessary to do so. If this does 399 * fail, we are basically without usable hardware. 400 */ 401 vbuf->render->allocate_vertices(vbuf->render, 402 (ushort) vbuf->vertex_size, 403 (ushort) vbuf->max_vertices); 404 405 vbuf->vertices = (uint *) vbuf->render->map_vertices( vbuf->render ); 406 407 vbuf->vertex_ptr = vbuf->vertices; 408} 409 410 411 412static void 413vbuf_flush( struct draw_stage *stage, unsigned flags ) 414{ 415 struct vbuf_stage *vbuf = vbuf_stage( stage ); 416 417 vbuf_flush_vertices( vbuf ); 418 419 stage->point = vbuf_first_point; 420 stage->line = vbuf_first_line; 421 stage->tri = vbuf_first_tri; 422} 423 424 425static void 426vbuf_reset_stipple_counter( struct draw_stage *stage ) 427{ 428 /* XXX: Need to do something here for hardware with linestipple. 429 */ 430 (void) stage; 431} 432 433 434static void vbuf_destroy( struct draw_stage *stage ) 435{ 436 struct vbuf_stage *vbuf = vbuf_stage( stage ); 437 438 if(vbuf->indices) 439 align_free( vbuf->indices ); 440 441 if (vbuf->render) 442 vbuf->render->destroy( vbuf->render ); 443 444 if (vbuf->cache) 445 translate_cache_destroy(vbuf->cache); 446 447 FREE( stage ); 448} 449 450 451/** 452 * Create a new primitive vbuf/render stage. 453 */ 454struct draw_stage *draw_vbuf_stage( struct draw_context *draw, 455 struct vbuf_render *render ) 456{ 457 struct vbuf_stage *vbuf = CALLOC_STRUCT(vbuf_stage); 458 if (vbuf == NULL) 459 goto fail; 460 461 vbuf->stage.draw = draw; 462 vbuf->stage.name = "vbuf"; 463 vbuf->stage.point = vbuf_first_point; 464 vbuf->stage.line = vbuf_first_line; 465 vbuf->stage.tri = vbuf_first_tri; 466 vbuf->stage.flush = vbuf_flush; 467 vbuf->stage.reset_stipple_counter = vbuf_reset_stipple_counter; 468 vbuf->stage.destroy = vbuf_destroy; 469 470 vbuf->render = render; 471 vbuf->max_indices = MAX2(render->max_indices, UNDEFINED_VERTEX_ID-1); 472 473 vbuf->indices = (ushort *) align_malloc( vbuf->max_indices * 474 sizeof(vbuf->indices[0]), 475 16 ); 476 if (!vbuf->indices) 477 goto fail; 478 479 vbuf->cache = translate_cache_create(); 480 if (!vbuf->cache) 481 goto fail; 482 483 484 vbuf->vertices = NULL; 485 vbuf->vertex_ptr = vbuf->vertices; 486 487 return &vbuf->stage; 488 489 fail: 490 if (vbuf) 491 vbuf_destroy(&vbuf->stage); 492 493 return NULL; 494} 495