st_draw.c revision 99feecc7d1d0a6efb2511859973d6029d9fed9fd
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 * This file implements the st_draw_vbo() function which is called from 30 * Mesa's VBO module. All point/line/triangle rendering is done through 31 * this function whether the user called glBegin/End, glDrawArrays, 32 * glDrawElements, glEvalMesh, or glCalList, etc. 33 * 34 * We basically convert the VBO's vertex attribute/array information into 35 * Gallium vertex state, bind the vertex buffer objects and call 36 * pipe->draw_vbo(). 37 * 38 * Authors: 39 * Keith Whitwell <keith@tungstengraphics.com> 40 */ 41 42 43#include "main/imports.h" 44#include "main/image.h" 45#include "main/bufferobj.h" 46#include "main/macros.h" 47#include "main/mfeatures.h" 48#include "program/prog_uniform.h" 49 50#include "vbo/vbo.h" 51 52#include "st_context.h" 53#include "st_atom.h" 54#include "st_cb_bufferobjects.h" 55#include "st_draw.h" 56#include "st_program.h" 57 58#include "pipe/p_context.h" 59#include "pipe/p_defines.h" 60#include "util/u_inlines.h" 61#include "util/u_format.h" 62#include "util/u_prim.h" 63#include "util/u_draw_quad.h" 64#include "draw/draw_context.h" 65#include "cso_cache/cso_context.h" 66 67 68static GLuint double_types[4] = { 69 PIPE_FORMAT_R64_FLOAT, 70 PIPE_FORMAT_R64G64_FLOAT, 71 PIPE_FORMAT_R64G64B64_FLOAT, 72 PIPE_FORMAT_R64G64B64A64_FLOAT 73}; 74 75static GLuint float_types[4] = { 76 PIPE_FORMAT_R32_FLOAT, 77 PIPE_FORMAT_R32G32_FLOAT, 78 PIPE_FORMAT_R32G32B32_FLOAT, 79 PIPE_FORMAT_R32G32B32A32_FLOAT 80}; 81 82static GLuint half_float_types[4] = { 83 PIPE_FORMAT_R16_FLOAT, 84 PIPE_FORMAT_R16G16_FLOAT, 85 PIPE_FORMAT_R16G16B16_FLOAT, 86 PIPE_FORMAT_R16G16B16A16_FLOAT 87}; 88 89static GLuint uint_types_norm[4] = { 90 PIPE_FORMAT_R32_UNORM, 91 PIPE_FORMAT_R32G32_UNORM, 92 PIPE_FORMAT_R32G32B32_UNORM, 93 PIPE_FORMAT_R32G32B32A32_UNORM 94}; 95 96static GLuint uint_types_scale[4] = { 97 PIPE_FORMAT_R32_USCALED, 98 PIPE_FORMAT_R32G32_USCALED, 99 PIPE_FORMAT_R32G32B32_USCALED, 100 PIPE_FORMAT_R32G32B32A32_USCALED 101}; 102 103static GLuint int_types_norm[4] = { 104 PIPE_FORMAT_R32_SNORM, 105 PIPE_FORMAT_R32G32_SNORM, 106 PIPE_FORMAT_R32G32B32_SNORM, 107 PIPE_FORMAT_R32G32B32A32_SNORM 108}; 109 110static GLuint int_types_scale[4] = { 111 PIPE_FORMAT_R32_SSCALED, 112 PIPE_FORMAT_R32G32_SSCALED, 113 PIPE_FORMAT_R32G32B32_SSCALED, 114 PIPE_FORMAT_R32G32B32A32_SSCALED 115}; 116 117static GLuint ushort_types_norm[4] = { 118 PIPE_FORMAT_R16_UNORM, 119 PIPE_FORMAT_R16G16_UNORM, 120 PIPE_FORMAT_R16G16B16_UNORM, 121 PIPE_FORMAT_R16G16B16A16_UNORM 122}; 123 124static GLuint ushort_types_scale[4] = { 125 PIPE_FORMAT_R16_USCALED, 126 PIPE_FORMAT_R16G16_USCALED, 127 PIPE_FORMAT_R16G16B16_USCALED, 128 PIPE_FORMAT_R16G16B16A16_USCALED 129}; 130 131static GLuint short_types_norm[4] = { 132 PIPE_FORMAT_R16_SNORM, 133 PIPE_FORMAT_R16G16_SNORM, 134 PIPE_FORMAT_R16G16B16_SNORM, 135 PIPE_FORMAT_R16G16B16A16_SNORM 136}; 137 138static GLuint short_types_scale[4] = { 139 PIPE_FORMAT_R16_SSCALED, 140 PIPE_FORMAT_R16G16_SSCALED, 141 PIPE_FORMAT_R16G16B16_SSCALED, 142 PIPE_FORMAT_R16G16B16A16_SSCALED 143}; 144 145static GLuint ubyte_types_norm[4] = { 146 PIPE_FORMAT_R8_UNORM, 147 PIPE_FORMAT_R8G8_UNORM, 148 PIPE_FORMAT_R8G8B8_UNORM, 149 PIPE_FORMAT_R8G8B8A8_UNORM 150}; 151 152static GLuint ubyte_types_scale[4] = { 153 PIPE_FORMAT_R8_USCALED, 154 PIPE_FORMAT_R8G8_USCALED, 155 PIPE_FORMAT_R8G8B8_USCALED, 156 PIPE_FORMAT_R8G8B8A8_USCALED 157}; 158 159static GLuint byte_types_norm[4] = { 160 PIPE_FORMAT_R8_SNORM, 161 PIPE_FORMAT_R8G8_SNORM, 162 PIPE_FORMAT_R8G8B8_SNORM, 163 PIPE_FORMAT_R8G8B8A8_SNORM 164}; 165 166static GLuint byte_types_scale[4] = { 167 PIPE_FORMAT_R8_SSCALED, 168 PIPE_FORMAT_R8G8_SSCALED, 169 PIPE_FORMAT_R8G8B8_SSCALED, 170 PIPE_FORMAT_R8G8B8A8_SSCALED 171}; 172 173static GLuint fixed_types[4] = { 174 PIPE_FORMAT_R32_FIXED, 175 PIPE_FORMAT_R32G32_FIXED, 176 PIPE_FORMAT_R32G32B32_FIXED, 177 PIPE_FORMAT_R32G32B32A32_FIXED 178}; 179 180 181 182/** 183 * Return a PIPE_FORMAT_x for the given GL datatype and size. 184 */ 185enum pipe_format 186st_pipe_vertex_format(GLenum type, GLuint size, GLenum format, 187 GLboolean normalized) 188{ 189 assert((type >= GL_BYTE && type <= GL_DOUBLE) || 190 type == GL_FIXED || type == GL_HALF_FLOAT); 191 assert(size >= 1); 192 assert(size <= 4); 193 assert(format == GL_RGBA || format == GL_BGRA); 194 195 if (format == GL_BGRA) { 196 /* this is an odd-ball case */ 197 assert(type == GL_UNSIGNED_BYTE); 198 assert(normalized); 199 return PIPE_FORMAT_B8G8R8A8_UNORM; 200 } 201 202 if (normalized) { 203 switch (type) { 204 case GL_DOUBLE: return double_types[size-1]; 205 case GL_FLOAT: return float_types[size-1]; 206 case GL_HALF_FLOAT: return half_float_types[size-1]; 207 case GL_INT: return int_types_norm[size-1]; 208 case GL_SHORT: return short_types_norm[size-1]; 209 case GL_BYTE: return byte_types_norm[size-1]; 210 case GL_UNSIGNED_INT: return uint_types_norm[size-1]; 211 case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1]; 212 case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1]; 213 case GL_FIXED: return fixed_types[size-1]; 214 default: assert(0); return 0; 215 } 216 } 217 else { 218 switch (type) { 219 case GL_DOUBLE: return double_types[size-1]; 220 case GL_FLOAT: return float_types[size-1]; 221 case GL_HALF_FLOAT: return half_float_types[size-1]; 222 case GL_INT: return int_types_scale[size-1]; 223 case GL_SHORT: return short_types_scale[size-1]; 224 case GL_BYTE: return byte_types_scale[size-1]; 225 case GL_UNSIGNED_INT: return uint_types_scale[size-1]; 226 case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1]; 227 case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1]; 228 case GL_FIXED: return fixed_types[size-1]; 229 default: assert(0); return 0; 230 } 231 } 232 return PIPE_FORMAT_NONE; /* silence compiler warning */ 233} 234 235 236 237/** 238 * Examine the active arrays to determine if we have interleaved 239 * vertex arrays all living in one VBO, or all living in user space. 240 */ 241static GLboolean 242is_interleaved_arrays(const struct st_vertex_program *vp, 243 const struct st_vp_variant *vpv, 244 const struct gl_client_array **arrays) 245{ 246 GLuint attr; 247 const struct gl_buffer_object *firstBufObj = NULL; 248 GLint firstStride = -1; 249 const GLubyte *firstPtr = NULL; 250 GLboolean userSpaceBuffer = GL_FALSE; 251 252 for (attr = 0; attr < vpv->num_inputs; attr++) { 253 const GLuint mesaAttr = vp->index_to_input[attr]; 254 const struct gl_client_array *array = arrays[mesaAttr]; 255 const struct gl_buffer_object *bufObj = array->BufferObj; 256 const GLsizei stride = array->StrideB; /* in bytes */ 257 258 if (attr == 0) { 259 /* save info about the first array */ 260 firstStride = stride; 261 firstPtr = array->Ptr; 262 firstBufObj = bufObj; 263 userSpaceBuffer = !bufObj || !bufObj->Name; 264 } 265 else { 266 /* check if other arrays interleave with the first, in same buffer */ 267 if (stride != firstStride) 268 return GL_FALSE; /* strides don't match */ 269 270 if (bufObj != firstBufObj) 271 return GL_FALSE; /* arrays in different VBOs */ 272 273 if (abs(array->Ptr - firstPtr) > firstStride) 274 return GL_FALSE; /* arrays start too far apart */ 275 276 if ((!bufObj || !_mesa_is_bufferobj(bufObj)) != userSpaceBuffer) 277 return GL_FALSE; /* mix of VBO and user-space arrays */ 278 } 279 } 280 281 return GL_TRUE; 282} 283 284 285/** 286 * Set up for drawing interleaved arrays that all live in one VBO 287 * or all live in user space. 288 * \param vbuffer returns vertex buffer info 289 * \param velements returns vertex element info 290 */ 291static void 292setup_interleaved_attribs(struct gl_context *ctx, 293 const struct st_vertex_program *vp, 294 const struct st_vp_variant *vpv, 295 const struct gl_client_array **arrays, 296 struct pipe_vertex_buffer *vbuffer, 297 struct pipe_vertex_element velements[], 298 unsigned max_index, 299 unsigned num_instances) 300{ 301 struct st_context *st = st_context(ctx); 302 struct pipe_context *pipe = st->pipe; 303 GLuint attr; 304 const GLubyte *low_addr = NULL; 305 306 /* Find the lowest address of the arrays we're drawing */ 307 if (vpv->num_inputs) { 308 low_addr = arrays[vp->index_to_input[0]]->Ptr; 309 310 for (attr = 1; attr < vpv->num_inputs; attr++) { 311 const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr; 312 low_addr = MIN2(low_addr, start); 313 } 314 } 315 316 for (attr = 0; attr < vpv->num_inputs; attr++) { 317 const GLuint mesaAttr = vp->index_to_input[attr]; 318 const struct gl_client_array *array = arrays[mesaAttr]; 319 struct gl_buffer_object *bufobj = array->BufferObj; 320 struct st_buffer_object *stobj = st_buffer_object(bufobj); 321 unsigned src_offset = (unsigned) (array->Ptr - low_addr); 322 GLuint element_size = array->_ElementSize; 323 GLsizei stride = array->StrideB; 324 325 assert(element_size == array->Size * _mesa_sizeof_type(array->Type)); 326 327 if (attr == 0) { 328 if (bufobj && _mesa_is_bufferobj(bufobj)) { 329 vbuffer->buffer = NULL; 330 pipe_resource_reference(&vbuffer->buffer, stobj->buffer); 331 vbuffer->buffer_offset = pointer_to_offset(low_addr); 332 } 333 else { 334 uint divisor = array->InstanceDivisor; 335 uint last_index = divisor ? num_instances / divisor : max_index; 336 uint bytes = src_offset + stride * last_index + element_size; 337 338 vbuffer->buffer = pipe_user_buffer_create(pipe->screen, 339 (void*) low_addr, 340 bytes, 341 PIPE_BIND_VERTEX_BUFFER); 342 vbuffer->buffer_offset = 0; 343 344 /* Track user vertex buffers. */ 345 pipe_resource_reference(&st->user_attrib[0].buffer, vbuffer->buffer); 346 st->user_attrib[0].element_size = element_size; 347 st->user_attrib[0].stride = stride; 348 st->num_user_attribs = 1; 349 } 350 vbuffer->stride = stride; /* in bytes */ 351 } 352 353 velements[attr].src_offset = src_offset; 354 velements[attr].instance_divisor = array->InstanceDivisor; 355 velements[attr].vertex_buffer_index = 0; 356 velements[attr].src_format = st_pipe_vertex_format(array->Type, 357 array->Size, 358 array->Format, 359 array->Normalized); 360 assert(velements[attr].src_format); 361 } 362} 363 364 365/** 366 * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each 367 * vertex attribute. 368 * \param vbuffer returns vertex buffer info 369 * \param velements returns vertex element info 370 */ 371static void 372setup_non_interleaved_attribs(struct gl_context *ctx, 373 const struct st_vertex_program *vp, 374 const struct st_vp_variant *vpv, 375 const struct gl_client_array **arrays, 376 struct pipe_vertex_buffer vbuffer[], 377 struct pipe_vertex_element velements[], 378 unsigned max_index, 379 unsigned num_instances) 380{ 381 struct st_context *st = st_context(ctx); 382 struct pipe_context *pipe = st->pipe; 383 GLuint attr; 384 385 for (attr = 0; attr < vpv->num_inputs; attr++) { 386 const GLuint mesaAttr = vp->index_to_input[attr]; 387 const struct gl_client_array *array = arrays[mesaAttr]; 388 struct gl_buffer_object *bufobj = array->BufferObj; 389 GLuint element_size = array->_ElementSize; 390 GLsizei stride = array->StrideB; 391 392 assert(element_size == array->Size * _mesa_sizeof_type(array->Type)); 393 394 if (bufobj && _mesa_is_bufferobj(bufobj)) { 395 /* Attribute data is in a VBO. 396 * Recall that for VBOs, the gl_client_array->Ptr field is 397 * really an offset from the start of the VBO, not a pointer. 398 */ 399 struct st_buffer_object *stobj = st_buffer_object(bufobj); 400 assert(stobj->buffer); 401 402 vbuffer[attr].buffer = NULL; 403 pipe_resource_reference(&vbuffer[attr].buffer, stobj->buffer); 404 vbuffer[attr].buffer_offset = pointer_to_offset(array->Ptr); 405 } 406 else { 407 /* wrap user data */ 408 uint bytes; 409 void *ptr; 410 411 if (array->Ptr) { 412 uint divisor = array->InstanceDivisor; 413 uint last_index = divisor ? num_instances / divisor : max_index; 414 415 bytes = stride * last_index + element_size; 416 417 ptr = (void *) array->Ptr; 418 } 419 else { 420 /* no array, use ctx->Current.Attrib[] value */ 421 bytes = element_size = sizeof(ctx->Current.Attrib[0]); 422 ptr = (void *) ctx->Current.Attrib[mesaAttr]; 423 stride = 0; 424 } 425 426 assert(ptr); 427 assert(bytes); 428 429 vbuffer[attr].buffer = 430 pipe_user_buffer_create(pipe->screen, ptr, bytes, 431 PIPE_BIND_VERTEX_BUFFER); 432 433 vbuffer[attr].buffer_offset = 0; 434 435 /* Track user vertex buffers. */ 436 pipe_resource_reference(&st->user_attrib[attr].buffer, vbuffer[attr].buffer); 437 st->user_attrib[attr].element_size = element_size; 438 st->user_attrib[attr].stride = stride; 439 st->num_user_attribs = MAX2(st->num_user_attribs, attr + 1); 440 } 441 442 /* common-case setup */ 443 vbuffer[attr].stride = stride; /* in bytes */ 444 445 velements[attr].src_offset = 0; 446 velements[attr].instance_divisor = array->InstanceDivisor; 447 velements[attr].vertex_buffer_index = attr; 448 velements[attr].src_format = st_pipe_vertex_format(array->Type, 449 array->Size, 450 array->Format, 451 array->Normalized); 452 assert(velements[attr].src_format); 453 } 454} 455 456 457static void 458setup_index_buffer(struct gl_context *ctx, 459 const struct _mesa_index_buffer *ib, 460 struct pipe_index_buffer *ibuffer) 461{ 462 struct st_context *st = st_context(ctx); 463 struct pipe_context *pipe = st->pipe; 464 465 memset(ibuffer, 0, sizeof(*ibuffer)); 466 if (ib) { 467 struct gl_buffer_object *bufobj = ib->obj; 468 469 switch (ib->type) { 470 case GL_UNSIGNED_INT: 471 ibuffer->index_size = 4; 472 break; 473 case GL_UNSIGNED_SHORT: 474 ibuffer->index_size = 2; 475 break; 476 case GL_UNSIGNED_BYTE: 477 ibuffer->index_size = 1; 478 break; 479 default: 480 assert(0); 481 return; 482 } 483 484 /* get/create the index buffer object */ 485 if (bufobj && _mesa_is_bufferobj(bufobj)) { 486 /* elements/indexes are in a real VBO */ 487 struct st_buffer_object *stobj = st_buffer_object(bufobj); 488 pipe_resource_reference(&ibuffer->buffer, stobj->buffer); 489 ibuffer->offset = pointer_to_offset(ib->ptr); 490 } 491 else { 492 /* element/indicies are in user space memory */ 493 ibuffer->buffer = 494 pipe_user_buffer_create(pipe->screen, (void *) ib->ptr, 495 ib->count * ibuffer->index_size, 496 PIPE_BIND_INDEX_BUFFER); 497 } 498 } 499} 500 501 502/** 503 * Prior to drawing, check that any uniforms referenced by the 504 * current shader have been set. If a uniform has not been set, 505 * issue a warning. 506 */ 507static void 508check_uniforms(struct gl_context *ctx) 509{ 510 struct gl_shader_program *shProg[3] = { 511 ctx->Shader.CurrentVertexProgram, 512 ctx->Shader.CurrentGeometryProgram, 513 ctx->Shader.CurrentFragmentProgram, 514 }; 515 unsigned j; 516 517 for (j = 0; j < 3; j++) { 518 unsigned i; 519 520 if (shProg[j] == NULL || !shProg[j]->LinkStatus) 521 continue; 522 523 for (i = 0; i < shProg[j]->Uniforms->NumUniforms; i++) { 524 const struct gl_uniform *u = &shProg[j]->Uniforms->Uniforms[i]; 525 if (!u->Initialized) { 526 _mesa_warning(ctx, 527 "Using shader with uninitialized uniform: %s", 528 u->Name); 529 } 530 } 531 } 532} 533 534 535/** 536 * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to 537 * the corresponding Gallium type. 538 */ 539static unsigned 540translate_prim(const struct gl_context *ctx, unsigned prim) 541{ 542 /* GL prims should match Gallium prims, spot-check a few */ 543 assert(GL_POINTS == PIPE_PRIM_POINTS); 544 assert(GL_QUADS == PIPE_PRIM_QUADS); 545 assert(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY); 546 547 /* Avoid quadstrips if it's easy to do so: 548 * Note: it's important to do the correct trimming if we change the 549 * prim type! We do that wherever this function is called. 550 */ 551 if (prim == GL_QUAD_STRIP && 552 ctx->Light.ShadeModel != GL_FLAT && 553 ctx->Polygon.FrontMode == GL_FILL && 554 ctx->Polygon.BackMode == GL_FILL) 555 prim = GL_TRIANGLE_STRIP; 556 557 return prim; 558} 559 560 561static void 562st_validate_varrays(struct gl_context *ctx, 563 const struct gl_client_array **arrays, 564 unsigned max_index, 565 unsigned num_instances) 566{ 567 struct st_context *st = st_context(ctx); 568 const struct st_vertex_program *vp; 569 const struct st_vp_variant *vpv; 570 struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS]; 571 struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS]; 572 unsigned num_vbuffers, num_velements; 573 GLuint attr; 574 unsigned i; 575 576 /* must get these after state validation! */ 577 vp = st->vp; 578 vpv = st->vp_variant; 579 580 memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs); 581 582 /* Unreference any user vertex buffers. */ 583 for (i = 0; i < st->num_user_attribs; i++) { 584 pipe_resource_reference(&st->user_attrib[i].buffer, NULL); 585 } 586 st->num_user_attribs = 0; 587 588 /* 589 * Setup the vbuffer[] and velements[] arrays. 590 */ 591 if (is_interleaved_arrays(vp, vpv, arrays)) { 592 setup_interleaved_attribs(ctx, vp, vpv, arrays, vbuffer, velements, 593 max_index, num_instances); 594 595 num_vbuffers = 1; 596 num_velements = vpv->num_inputs; 597 if (num_velements == 0) 598 num_vbuffers = 0; 599 } 600 else { 601 setup_non_interleaved_attribs(ctx, vp, vpv, arrays, 602 vbuffer, velements, max_index, 603 num_instances); 604 num_vbuffers = vpv->num_inputs; 605 num_velements = vpv->num_inputs; 606 } 607 608 cso_set_vertex_buffers(st->cso_context, num_vbuffers, vbuffer); 609 cso_set_vertex_elements(st->cso_context, num_velements, velements); 610 611 /* unreference buffers (frees wrapped user-space buffer objects) 612 * This is OK, because the pipe driver should reference buffers by itself 613 * in set_vertex_buffers. */ 614 for (attr = 0; attr < num_vbuffers; attr++) { 615 pipe_resource_reference(&vbuffer[attr].buffer, NULL); 616 assert(!vbuffer[attr].buffer); 617 } 618} 619 620 621/** 622 * This function gets plugged into the VBO module and is called when 623 * we have something to render. 624 * Basically, translate the information into the format expected by gallium. 625 */ 626void 627st_draw_vbo(struct gl_context *ctx, 628 const struct gl_client_array **arrays, 629 const struct _mesa_prim *prims, 630 GLuint nr_prims, 631 const struct _mesa_index_buffer *ib, 632 GLboolean index_bounds_valid, 633 GLuint min_index, 634 GLuint max_index) 635{ 636 struct st_context *st = st_context(ctx); 637 struct pipe_context *pipe = st->pipe; 638 struct pipe_index_buffer ibuffer; 639 struct pipe_draw_info info; 640 unsigned i, num_instances = 1; 641 GLboolean new_array = 642 st->dirty.st && 643 (st->dirty.mesa & (_NEW_ARRAY | _NEW_PROGRAM | _NEW_BUFFER_OBJECT)) != 0; 644 645 /* Mesa core state should have been validated already */ 646 assert(ctx->NewState == 0x0); 647 648 if (ib) { 649 /* Gallium probably doesn't want this in some cases. */ 650 if (!index_bounds_valid) 651 if (!vbo_all_varyings_in_vbos(arrays)) 652 vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index); 653 654 for (i = 0; i < nr_prims; i++) { 655 num_instances = MAX2(num_instances, prims[i].num_instances); 656 } 657 } 658 else { 659 /* Get min/max index for non-indexed drawing. */ 660 min_index = ~0; 661 max_index = 0; 662 663 for (i = 0; i < nr_prims; i++) { 664 min_index = MIN2(min_index, prims[i].start); 665 max_index = MAX2(max_index, prims[i].start + prims[i].count - 1); 666 num_instances = MAX2(num_instances, prims[i].num_instances); 667 } 668 } 669 670 /* Validate state. */ 671 if (st->dirty.st) { 672 GLboolean vertDataEdgeFlags; 673 674 /* sanity check for pointer arithmetic below */ 675 assert(sizeof(arrays[0]->Ptr[0]) == 1); 676 677 vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj && 678 arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name; 679 if (vertDataEdgeFlags != st->vertdata_edgeflags) { 680 st->vertdata_edgeflags = vertDataEdgeFlags; 681 st->dirty.st |= ST_NEW_EDGEFLAGS_DATA; 682 } 683 684 st_validate_state(st); 685 686 if (new_array) { 687 st_validate_varrays(ctx, arrays, max_index, num_instances); 688 } 689 690#if 0 691 if (MESA_VERBOSE & VERBOSE_GLSL) { 692 check_uniforms(ctx); 693 } 694#else 695 (void) check_uniforms; 696#endif 697 } 698 699 /* Notify the driver that the content of user buffers may have been 700 * changed. */ 701 assert(max_index >= min_index); 702 if (!new_array && st->num_user_attribs) { 703 for (i = 0; i < st->num_user_attribs; i++) { 704 if (st->user_attrib[i].buffer) { 705 unsigned element_size = st->user_attrib[i].element_size; 706 unsigned stride = st->user_attrib[i].stride; 707 unsigned min_offset = min_index * stride; 708 unsigned max_offset = max_index * stride + element_size; 709 710 assert(max_offset > min_offset); 711 712 pipe->redefine_user_buffer(pipe, st->user_attrib[i].buffer, 713 min_offset, 714 max_offset - min_offset); 715 } 716 } 717 } 718 719 setup_index_buffer(ctx, ib, &ibuffer); 720 pipe->set_index_buffer(pipe, &ibuffer); 721 722 util_draw_init_info(&info); 723 if (ib) { 724 info.indexed = TRUE; 725 if (min_index != ~0 && max_index != ~0) { 726 info.min_index = min_index; 727 info.max_index = max_index; 728 } 729 } 730 731 info.primitive_restart = ctx->Array.PrimitiveRestart; 732 info.restart_index = ctx->Array.RestartIndex; 733 734 /* do actual drawing */ 735 for (i = 0; i < nr_prims; i++) { 736 info.mode = translate_prim( ctx, prims[i].mode ); 737 info.start = prims[i].start; 738 info.count = prims[i].count; 739 info.instance_count = prims[i].num_instances; 740 info.index_bias = prims[i].basevertex; 741 if (!ib) { 742 info.min_index = info.start; 743 info.max_index = info.start + info.count - 1; 744 } 745 746 if (u_trim_pipe_prim(info.mode, &info.count)) 747 pipe->draw_vbo(pipe, &info); 748 } 749 750 pipe_resource_reference(&ibuffer.buffer, NULL); 751} 752 753 754void 755st_init_draw(struct st_context *st) 756{ 757 struct gl_context *ctx = st->ctx; 758 759 vbo_set_draw_func(ctx, st_draw_vbo); 760 761#if FEATURE_feedback || FEATURE_rastpos 762 st->draw = draw_create(st->pipe); /* for selection/feedback */ 763 764 /* Disable draw options that might convert points/lines to tris, etc. 765 * as that would foul-up feedback/selection mode. 766 */ 767 draw_wide_line_threshold(st->draw, 1000.0f); 768 draw_wide_point_threshold(st->draw, 1000.0f); 769 draw_enable_line_stipple(st->draw, FALSE); 770 draw_enable_point_sprites(st->draw, FALSE); 771#endif 772} 773 774 775void 776st_destroy_draw(struct st_context *st) 777{ 778#if FEATURE_feedback || FEATURE_rastpos 779 draw_destroy(st->draw); 780#endif 781} 782