st_draw.c revision c3991e1c57d3e09fd17f0bd868b73b35cca96d6f
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 49#include "vbo/vbo.h" 50 51#include "st_context.h" 52#include "st_atom.h" 53#include "st_cb_bufferobjects.h" 54#include "st_cb_xformfb.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 "util/u_upload_mgr.h" 65#include "draw/draw_context.h" 66#include "cso_cache/cso_context.h" 67 68#include "../glsl/ir_uniform.h" 69 70 71static GLuint double_types[4] = { 72 PIPE_FORMAT_R64_FLOAT, 73 PIPE_FORMAT_R64G64_FLOAT, 74 PIPE_FORMAT_R64G64B64_FLOAT, 75 PIPE_FORMAT_R64G64B64A64_FLOAT 76}; 77 78static GLuint float_types[4] = { 79 PIPE_FORMAT_R32_FLOAT, 80 PIPE_FORMAT_R32G32_FLOAT, 81 PIPE_FORMAT_R32G32B32_FLOAT, 82 PIPE_FORMAT_R32G32B32A32_FLOAT 83}; 84 85static GLuint half_float_types[4] = { 86 PIPE_FORMAT_R16_FLOAT, 87 PIPE_FORMAT_R16G16_FLOAT, 88 PIPE_FORMAT_R16G16B16_FLOAT, 89 PIPE_FORMAT_R16G16B16A16_FLOAT 90}; 91 92static GLuint uint_types_norm[4] = { 93 PIPE_FORMAT_R32_UNORM, 94 PIPE_FORMAT_R32G32_UNORM, 95 PIPE_FORMAT_R32G32B32_UNORM, 96 PIPE_FORMAT_R32G32B32A32_UNORM 97}; 98 99static GLuint uint_types_scale[4] = { 100 PIPE_FORMAT_R32_USCALED, 101 PIPE_FORMAT_R32G32_USCALED, 102 PIPE_FORMAT_R32G32B32_USCALED, 103 PIPE_FORMAT_R32G32B32A32_USCALED 104}; 105 106static GLuint uint_types_int[4] = { 107 PIPE_FORMAT_R32_UINT, 108 PIPE_FORMAT_R32G32_UINT, 109 PIPE_FORMAT_R32G32B32_UINT, 110 PIPE_FORMAT_R32G32B32A32_UINT 111}; 112 113static GLuint int_types_norm[4] = { 114 PIPE_FORMAT_R32_SNORM, 115 PIPE_FORMAT_R32G32_SNORM, 116 PIPE_FORMAT_R32G32B32_SNORM, 117 PIPE_FORMAT_R32G32B32A32_SNORM 118}; 119 120static GLuint int_types_scale[4] = { 121 PIPE_FORMAT_R32_SSCALED, 122 PIPE_FORMAT_R32G32_SSCALED, 123 PIPE_FORMAT_R32G32B32_SSCALED, 124 PIPE_FORMAT_R32G32B32A32_SSCALED 125}; 126 127static GLuint int_types_int[4] = { 128 PIPE_FORMAT_R32_SINT, 129 PIPE_FORMAT_R32G32_SINT, 130 PIPE_FORMAT_R32G32B32_SINT, 131 PIPE_FORMAT_R32G32B32A32_SINT 132}; 133 134static GLuint ushort_types_norm[4] = { 135 PIPE_FORMAT_R16_UNORM, 136 PIPE_FORMAT_R16G16_UNORM, 137 PIPE_FORMAT_R16G16B16_UNORM, 138 PIPE_FORMAT_R16G16B16A16_UNORM 139}; 140 141static GLuint ushort_types_scale[4] = { 142 PIPE_FORMAT_R16_USCALED, 143 PIPE_FORMAT_R16G16_USCALED, 144 PIPE_FORMAT_R16G16B16_USCALED, 145 PIPE_FORMAT_R16G16B16A16_USCALED 146}; 147 148static GLuint ushort_types_int[4] = { 149 PIPE_FORMAT_R16_UINT, 150 PIPE_FORMAT_R16G16_UINT, 151 PIPE_FORMAT_R16G16B16_UINT, 152 PIPE_FORMAT_R16G16B16A16_UINT 153}; 154 155static GLuint short_types_norm[4] = { 156 PIPE_FORMAT_R16_SNORM, 157 PIPE_FORMAT_R16G16_SNORM, 158 PIPE_FORMAT_R16G16B16_SNORM, 159 PIPE_FORMAT_R16G16B16A16_SNORM 160}; 161 162static GLuint short_types_scale[4] = { 163 PIPE_FORMAT_R16_SSCALED, 164 PIPE_FORMAT_R16G16_SSCALED, 165 PIPE_FORMAT_R16G16B16_SSCALED, 166 PIPE_FORMAT_R16G16B16A16_SSCALED 167}; 168 169static GLuint short_types_int[4] = { 170 PIPE_FORMAT_R16_SINT, 171 PIPE_FORMAT_R16G16_SINT, 172 PIPE_FORMAT_R16G16B16_SINT, 173 PIPE_FORMAT_R16G16B16A16_SINT 174}; 175 176static GLuint ubyte_types_norm[4] = { 177 PIPE_FORMAT_R8_UNORM, 178 PIPE_FORMAT_R8G8_UNORM, 179 PIPE_FORMAT_R8G8B8_UNORM, 180 PIPE_FORMAT_R8G8B8A8_UNORM 181}; 182 183static GLuint ubyte_types_scale[4] = { 184 PIPE_FORMAT_R8_USCALED, 185 PIPE_FORMAT_R8G8_USCALED, 186 PIPE_FORMAT_R8G8B8_USCALED, 187 PIPE_FORMAT_R8G8B8A8_USCALED 188}; 189 190static GLuint ubyte_types_int[4] = { 191 PIPE_FORMAT_R8_UINT, 192 PIPE_FORMAT_R8G8_UINT, 193 PIPE_FORMAT_R8G8B8_UINT, 194 PIPE_FORMAT_R8G8B8A8_UINT 195}; 196 197static GLuint byte_types_norm[4] = { 198 PIPE_FORMAT_R8_SNORM, 199 PIPE_FORMAT_R8G8_SNORM, 200 PIPE_FORMAT_R8G8B8_SNORM, 201 PIPE_FORMAT_R8G8B8A8_SNORM 202}; 203 204static GLuint byte_types_scale[4] = { 205 PIPE_FORMAT_R8_SSCALED, 206 PIPE_FORMAT_R8G8_SSCALED, 207 PIPE_FORMAT_R8G8B8_SSCALED, 208 PIPE_FORMAT_R8G8B8A8_SSCALED 209}; 210 211static GLuint byte_types_int[4] = { 212 PIPE_FORMAT_R8_SINT, 213 PIPE_FORMAT_R8G8_SINT, 214 PIPE_FORMAT_R8G8B8_SINT, 215 PIPE_FORMAT_R8G8B8A8_SINT 216}; 217 218static GLuint fixed_types[4] = { 219 PIPE_FORMAT_R32_FIXED, 220 PIPE_FORMAT_R32G32_FIXED, 221 PIPE_FORMAT_R32G32B32_FIXED, 222 PIPE_FORMAT_R32G32B32A32_FIXED 223}; 224 225 226 227/** 228 * Return a PIPE_FORMAT_x for the given GL datatype and size. 229 */ 230enum pipe_format 231st_pipe_vertex_format(GLenum type, GLuint size, GLenum format, 232 GLboolean normalized, GLboolean integer) 233{ 234 assert((type >= GL_BYTE && type <= GL_DOUBLE) || 235 type == GL_FIXED || type == GL_HALF_FLOAT || 236 type == GL_INT_2_10_10_10_REV || 237 type == GL_UNSIGNED_INT_2_10_10_10_REV); 238 assert(size >= 1); 239 assert(size <= 4); 240 assert(format == GL_RGBA || format == GL_BGRA); 241 242 if (type == GL_INT_2_10_10_10_REV || 243 type == GL_UNSIGNED_INT_2_10_10_10_REV) { 244 assert(size == 4); 245 assert(!integer); 246 247 if (format == GL_BGRA) { 248 if (type == GL_INT_2_10_10_10_REV) { 249 if (normalized) 250 return PIPE_FORMAT_B10G10R10A2_SNORM; 251 else 252 return PIPE_FORMAT_B10G10R10A2_SSCALED; 253 } else { 254 if (normalized) 255 return PIPE_FORMAT_B10G10R10A2_UNORM; 256 else 257 return PIPE_FORMAT_B10G10R10A2_USCALED; 258 } 259 } else { 260 if (type == GL_INT_2_10_10_10_REV) { 261 if (normalized) 262 return PIPE_FORMAT_R10G10B10A2_SNORM; 263 else 264 return PIPE_FORMAT_R10G10B10A2_SSCALED; 265 } else { 266 if (normalized) 267 return PIPE_FORMAT_R10G10B10A2_UNORM; 268 else 269 return PIPE_FORMAT_R10G10B10A2_USCALED; 270 } 271 } 272 } 273 274 if (format == GL_BGRA) { 275 /* this is an odd-ball case */ 276 assert(type == GL_UNSIGNED_BYTE); 277 assert(normalized); 278 return PIPE_FORMAT_B8G8R8A8_UNORM; 279 } 280 281 if (integer) { 282 switch (type) { 283 case GL_INT: return int_types_int[size-1]; 284 case GL_SHORT: return short_types_int[size-1]; 285 case GL_BYTE: return byte_types_int[size-1]; 286 case GL_UNSIGNED_INT: return uint_types_int[size-1]; 287 case GL_UNSIGNED_SHORT: return ushort_types_int[size-1]; 288 case GL_UNSIGNED_BYTE: return ubyte_types_int[size-1]; 289 default: assert(0); return 0; 290 } 291 } 292 else if (normalized) { 293 switch (type) { 294 case GL_DOUBLE: return double_types[size-1]; 295 case GL_FLOAT: return float_types[size-1]; 296 case GL_HALF_FLOAT: return half_float_types[size-1]; 297 case GL_INT: return int_types_norm[size-1]; 298 case GL_SHORT: return short_types_norm[size-1]; 299 case GL_BYTE: return byte_types_norm[size-1]; 300 case GL_UNSIGNED_INT: return uint_types_norm[size-1]; 301 case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1]; 302 case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1]; 303 case GL_FIXED: return fixed_types[size-1]; 304 default: assert(0); return 0; 305 } 306 } 307 else { 308 switch (type) { 309 case GL_DOUBLE: return double_types[size-1]; 310 case GL_FLOAT: return float_types[size-1]; 311 case GL_HALF_FLOAT: return half_float_types[size-1]; 312 case GL_INT: return int_types_scale[size-1]; 313 case GL_SHORT: return short_types_scale[size-1]; 314 case GL_BYTE: return byte_types_scale[size-1]; 315 case GL_UNSIGNED_INT: return uint_types_scale[size-1]; 316 case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1]; 317 case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1]; 318 case GL_FIXED: return fixed_types[size-1]; 319 default: assert(0); return 0; 320 } 321 } 322 return PIPE_FORMAT_NONE; /* silence compiler warning */ 323} 324 325 326/** 327 * This is very similar to vbo_all_varyings_in_vbos() but we are 328 * only interested in per-vertex data. See bug 38626. 329 */ 330static GLboolean 331all_varyings_in_vbos(const struct gl_client_array *arrays[]) 332{ 333 GLuint i; 334 335 for (i = 0; i < VERT_ATTRIB_MAX; i++) 336 if (arrays[i]->StrideB && 337 !arrays[i]->InstanceDivisor && 338 !_mesa_is_bufferobj(arrays[i]->BufferObj)) 339 return GL_FALSE; 340 341 return GL_TRUE; 342} 343 344 345/** 346 * Examine the active arrays to determine if we have interleaved 347 * vertex arrays all living in one VBO, or all living in user space. 348 */ 349static GLboolean 350is_interleaved_arrays(const struct st_vertex_program *vp, 351 const struct st_vp_variant *vpv, 352 const struct gl_client_array **arrays) 353{ 354 GLuint attr; 355 const struct gl_buffer_object *firstBufObj = NULL; 356 GLint firstStride = -1; 357 const GLubyte *firstPtr = NULL; 358 GLboolean userSpaceBuffer = GL_FALSE; 359 360 for (attr = 0; attr < vpv->num_inputs; attr++) { 361 const GLuint mesaAttr = vp->index_to_input[attr]; 362 const struct gl_client_array *array = arrays[mesaAttr]; 363 const struct gl_buffer_object *bufObj = array->BufferObj; 364 const GLsizei stride = array->StrideB; /* in bytes */ 365 366 if (attr == 0) { 367 /* save info about the first array */ 368 firstStride = stride; 369 firstPtr = array->Ptr; 370 firstBufObj = bufObj; 371 userSpaceBuffer = !bufObj || !bufObj->Name; 372 } 373 else { 374 /* check if other arrays interleave with the first, in same buffer */ 375 if (stride != firstStride) 376 return GL_FALSE; /* strides don't match */ 377 378 if (bufObj != firstBufObj) 379 return GL_FALSE; /* arrays in different VBOs */ 380 381 if (abs(array->Ptr - firstPtr) > firstStride) 382 return GL_FALSE; /* arrays start too far apart */ 383 384 if ((!_mesa_is_bufferobj(bufObj)) != userSpaceBuffer) 385 return GL_FALSE; /* mix of VBO and user-space arrays */ 386 } 387 } 388 389 return GL_TRUE; 390} 391 392 393/** 394 * Set up for drawing interleaved arrays that all live in one VBO 395 * or all live in user space. 396 * \param vbuffer returns vertex buffer info 397 * \param velements returns vertex element info 398 * \return GL_TRUE for success, GL_FALSE otherwise (probably out of memory) 399 */ 400static GLboolean 401setup_interleaved_attribs(struct gl_context *ctx, 402 const struct st_vertex_program *vp, 403 const struct st_vp_variant *vpv, 404 const struct gl_client_array **arrays, 405 struct pipe_vertex_buffer *vbuffer, 406 struct pipe_vertex_element velements[]) 407{ 408 GLuint attr; 409 const GLubyte *low_addr = NULL; 410 GLboolean usingVBO; /* all arrays in a VBO? */ 411 struct gl_buffer_object *bufobj; 412 GLsizei stride; 413 414 /* Find the lowest address of the arrays we're drawing, 415 * Init bufobj and stride. 416 */ 417 if (vpv->num_inputs) { 418 const GLuint mesaAttr0 = vp->index_to_input[0]; 419 const struct gl_client_array *array = arrays[mesaAttr0]; 420 421 /* Since we're doing interleaved arrays, we know there'll be at most 422 * one buffer object and the stride will be the same for all arrays. 423 * Grab them now. 424 */ 425 bufobj = array->BufferObj; 426 stride = array->StrideB; 427 428 low_addr = arrays[vp->index_to_input[0]]->Ptr; 429 430 for (attr = 1; attr < vpv->num_inputs; attr++) { 431 const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr; 432 low_addr = MIN2(low_addr, start); 433 } 434 } 435 else { 436 /* not sure we'll ever have zero inputs, but play it safe */ 437 bufobj = NULL; 438 stride = 0; 439 low_addr = 0; 440 } 441 442 /* are the arrays in user space? */ 443 usingVBO = _mesa_is_bufferobj(bufobj); 444 445 for (attr = 0; attr < vpv->num_inputs; attr++) { 446 const GLuint mesaAttr = vp->index_to_input[attr]; 447 const struct gl_client_array *array = arrays[mesaAttr]; 448 unsigned src_offset = (unsigned) (array->Ptr - low_addr); 449 GLuint element_size = array->_ElementSize; 450 451 assert(element_size == array->Size * _mesa_sizeof_type(array->Type)); 452 453 velements[attr].src_offset = src_offset; 454 velements[attr].instance_divisor = array->InstanceDivisor; 455 velements[attr].vertex_buffer_index = 0; 456 velements[attr].src_format = st_pipe_vertex_format(array->Type, 457 array->Size, 458 array->Format, 459 array->Normalized, 460 array->Integer); 461 assert(velements[attr].src_format); 462 } 463 464 /* 465 * Return the vbuffer info and setup user-space attrib info, if needed. 466 */ 467 if (vpv->num_inputs == 0) { 468 /* just defensive coding here */ 469 vbuffer->buffer = NULL; 470 vbuffer->user_buffer = NULL; 471 vbuffer->buffer_offset = 0; 472 vbuffer->stride = 0; 473 } 474 else if (usingVBO) { 475 /* all interleaved arrays in a VBO */ 476 struct st_buffer_object *stobj = st_buffer_object(bufobj); 477 478 if (!stobj || !stobj->buffer) { 479 /* probably out of memory (or zero-sized buffer) */ 480 return GL_FALSE; 481 } 482 483 vbuffer->buffer = stobj->buffer; 484 vbuffer->user_buffer = NULL; 485 vbuffer->buffer_offset = pointer_to_offset(low_addr); 486 vbuffer->stride = stride; 487 } 488 else { 489 /* all interleaved arrays in user memory */ 490 vbuffer->buffer = NULL; 491 vbuffer->user_buffer = low_addr; 492 vbuffer->buffer_offset = 0; 493 vbuffer->stride = stride; 494 } 495 496 return GL_TRUE; 497} 498 499 500/** 501 * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each 502 * vertex attribute. 503 * \param vbuffer returns vertex buffer info 504 * \param velements returns vertex element info 505 * \return GL_TRUE for success, GL_FALSE otherwise (probably out of memory) 506 */ 507static GLboolean 508setup_non_interleaved_attribs(struct gl_context *ctx, 509 const struct st_vertex_program *vp, 510 const struct st_vp_variant *vpv, 511 const struct gl_client_array **arrays, 512 struct pipe_vertex_buffer vbuffer[], 513 struct pipe_vertex_element velements[]) 514{ 515 GLuint attr; 516 517 for (attr = 0; attr < vpv->num_inputs; attr++) { 518 const GLuint mesaAttr = vp->index_to_input[attr]; 519 const struct gl_client_array *array = arrays[mesaAttr]; 520 struct gl_buffer_object *bufobj = array->BufferObj; 521 GLsizei stride = array->StrideB; 522 523 assert(array->_ElementSize == array->Size * _mesa_sizeof_type(array->Type)); 524 525 if (_mesa_is_bufferobj(bufobj)) { 526 /* Attribute data is in a VBO. 527 * Recall that for VBOs, the gl_client_array->Ptr field is 528 * really an offset from the start of the VBO, not a pointer. 529 */ 530 struct st_buffer_object *stobj = st_buffer_object(bufobj); 531 532 if (!stobj || !stobj->buffer) { 533 /* probably out of memory (or zero-sized buffer) */ 534 return GL_FALSE; 535 } 536 537 vbuffer[attr].buffer = stobj->buffer; 538 vbuffer[attr].user_buffer = NULL; 539 vbuffer[attr].buffer_offset = pointer_to_offset(array->Ptr); 540 } 541 else { 542 /* wrap user data */ 543 void *ptr; 544 545 if (array->Ptr) { 546 ptr = (void *) array->Ptr; 547 } 548 else { 549 /* no array, use ctx->Current.Attrib[] value */ 550 ptr = (void *) ctx->Current.Attrib[mesaAttr]; 551 stride = 0; 552 } 553 554 assert(ptr); 555 556 vbuffer[attr].buffer = NULL; 557 vbuffer[attr].user_buffer = ptr; 558 vbuffer[attr].buffer_offset = 0; 559 } 560 561 /* common-case setup */ 562 vbuffer[attr].stride = stride; /* in bytes */ 563 564 velements[attr].src_offset = 0; 565 velements[attr].instance_divisor = array->InstanceDivisor; 566 velements[attr].vertex_buffer_index = attr; 567 velements[attr].src_format = st_pipe_vertex_format(array->Type, 568 array->Size, 569 array->Format, 570 array->Normalized, 571 array->Integer); 572 assert(velements[attr].src_format); 573 } 574 575 return GL_TRUE; 576} 577 578 579static void 580setup_index_buffer(struct st_context *st, 581 const struct _mesa_index_buffer *ib, 582 struct pipe_index_buffer *ibuffer) 583{ 584 struct gl_buffer_object *bufobj = ib->obj; 585 586 ibuffer->index_size = vbo_sizeof_ib_type(ib->type); 587 588 /* get/create the index buffer object */ 589 if (_mesa_is_bufferobj(bufobj)) { 590 /* indices are in a real VBO */ 591 ibuffer->buffer = st_buffer_object(bufobj)->buffer; 592 ibuffer->offset = pointer_to_offset(ib->ptr); 593 } 594 else if (st->indexbuf_uploader) { 595 u_upload_data(st->indexbuf_uploader, 0, ib->count * ibuffer->index_size, 596 ib->ptr, &ibuffer->offset, &ibuffer->buffer); 597 u_upload_unmap(st->indexbuf_uploader); 598 } 599 else { 600 /* indices are in user space memory */ 601 ibuffer->user_buffer = ib->ptr; 602 } 603 604 cso_set_index_buffer(st->cso_context, ibuffer); 605} 606 607 608/** 609 * Prior to drawing, check that any uniforms referenced by the 610 * current shader have been set. If a uniform has not been set, 611 * issue a warning. 612 */ 613static void 614check_uniforms(struct gl_context *ctx) 615{ 616 struct gl_shader_program *shProg[3] = { 617 ctx->Shader.CurrentVertexProgram, 618 ctx->Shader.CurrentGeometryProgram, 619 ctx->Shader.CurrentFragmentProgram, 620 }; 621 unsigned j; 622 623 for (j = 0; j < 3; j++) { 624 unsigned i; 625 626 if (shProg[j] == NULL || !shProg[j]->LinkStatus) 627 continue; 628 629 for (i = 0; i < shProg[j]->NumUserUniformStorage; i++) { 630 const struct gl_uniform_storage *u = &shProg[j]->UniformStorage[i]; 631 if (!u->initialized) { 632 _mesa_warning(ctx, 633 "Using shader with uninitialized uniform: %s", 634 u->name); 635 } 636 } 637 } 638} 639 640 641/** 642 * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to 643 * the corresponding Gallium type. 644 */ 645static unsigned 646translate_prim(const struct gl_context *ctx, unsigned prim) 647{ 648 /* GL prims should match Gallium prims, spot-check a few */ 649 assert(GL_POINTS == PIPE_PRIM_POINTS); 650 assert(GL_QUADS == PIPE_PRIM_QUADS); 651 assert(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY); 652 653 /* Avoid quadstrips if it's easy to do so: 654 * Note: it's important to do the correct trimming if we change the 655 * prim type! We do that wherever this function is called. 656 */ 657 if (prim == GL_QUAD_STRIP && 658 ctx->Light.ShadeModel != GL_FLAT && 659 ctx->Polygon.FrontMode == GL_FILL && 660 ctx->Polygon.BackMode == GL_FILL) 661 prim = GL_TRIANGLE_STRIP; 662 663 return prim; 664} 665 666 667/** 668 * Setup vertex arrays and buffers prior to drawing. 669 * \return GL_TRUE for success, GL_FALSE otherwise (probably out of memory) 670 */ 671static GLboolean 672st_validate_varrays(struct gl_context *ctx, 673 const struct gl_client_array **arrays) 674{ 675 struct st_context *st = st_context(ctx); 676 const struct st_vertex_program *vp; 677 const struct st_vp_variant *vpv; 678 struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS]; 679 struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS]; 680 unsigned num_vbuffers, num_velements; 681 682 /* must get these after state validation! */ 683 vp = st->vp; 684 vpv = st->vp_variant; 685 686 memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs); 687 688 /* 689 * Setup the vbuffer[] and velements[] arrays. 690 */ 691 if (is_interleaved_arrays(vp, vpv, arrays)) { 692 if (!setup_interleaved_attribs(ctx, vp, vpv, arrays, vbuffer, 693 velements)) { 694 return GL_FALSE; 695 } 696 697 num_vbuffers = 1; 698 num_velements = vpv->num_inputs; 699 if (num_velements == 0) 700 num_vbuffers = 0; 701 } 702 else { 703 if (!setup_non_interleaved_attribs(ctx, vp, vpv, arrays, 704 vbuffer, velements)) { 705 return GL_FALSE; 706 } 707 708 num_vbuffers = vpv->num_inputs; 709 num_velements = vpv->num_inputs; 710 } 711 712 cso_set_vertex_buffers(st->cso_context, num_vbuffers, vbuffer); 713 cso_set_vertex_elements(st->cso_context, num_velements, velements); 714 715 return GL_TRUE; 716} 717 718 719/** 720 * This function gets plugged into the VBO module and is called when 721 * we have something to render. 722 * Basically, translate the information into the format expected by gallium. 723 */ 724void 725st_draw_vbo(struct gl_context *ctx, 726 const struct _mesa_prim *prims, 727 GLuint nr_prims, 728 const struct _mesa_index_buffer *ib, 729 GLboolean index_bounds_valid, 730 GLuint min_index, 731 GLuint max_index, 732 struct gl_transform_feedback_object *tfb_vertcount) 733{ 734 struct st_context *st = st_context(ctx); 735 struct pipe_index_buffer ibuffer = {0}; 736 struct pipe_draw_info info; 737 const struct gl_client_array **arrays = ctx->Array._DrawArrays; 738 unsigned i; 739 GLboolean new_array; 740 741 /* Mesa core state should have been validated already */ 742 assert(ctx->NewState == 0x0); 743 744 /* Get Mesa driver state. */ 745 st->dirty.st |= ctx->NewDriverState; 746 ctx->NewDriverState = 0; 747 748 new_array = 749 (st->dirty.st & (ST_NEW_VERTEX_ARRAYS | ST_NEW_VERTEX_PROGRAM)) || 750 (st->dirty.mesa & (_NEW_PROGRAM | _NEW_BUFFER_OBJECT)) != 0; 751 752 /* Validate state. */ 753 if (st->dirty.st) { 754 GLboolean vertDataEdgeFlags; 755 756 vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj && 757 arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name; 758 if (vertDataEdgeFlags != st->vertdata_edgeflags) { 759 st->vertdata_edgeflags = vertDataEdgeFlags; 760 st->dirty.st |= ST_NEW_EDGEFLAGS_DATA; 761 } 762 763 st_validate_state(st); 764 765 if (new_array) { 766 if (!st_validate_varrays(ctx, arrays)) { 767 /* probably out of memory, no-op the draw call */ 768 return; 769 } 770 } 771 772#if 0 773 if (MESA_VERBOSE & VERBOSE_GLSL) { 774 check_uniforms(ctx); 775 } 776#else 777 (void) check_uniforms; 778#endif 779 } 780 781 util_draw_init_info(&info); 782 if (ib) { 783 /* Get index bounds for user buffers. */ 784 if (!index_bounds_valid) 785 if (!all_varyings_in_vbos(arrays)) 786 vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, 787 nr_prims); 788 789 setup_index_buffer(st, ib, &ibuffer); 790 791 info.indexed = TRUE; 792 if (min_index != ~0 && max_index != ~0) { 793 info.min_index = min_index; 794 info.max_index = max_index; 795 } 796 797 /* The VBO module handles restart for the non-indexed GLDrawArrays 798 * so we only set these fields for indexed drawing: 799 */ 800 info.primitive_restart = ctx->Array.PrimitiveRestart; 801 info.restart_index = ctx->Array.RestartIndex; 802 } 803 else { 804 /* Transform feedback drawing is always non-indexed. */ 805 /* Set info.count_from_stream_output. */ 806 if (tfb_vertcount) { 807 st_transform_feedback_draw_init(tfb_vertcount, &info); 808 } 809 } 810 811 /* do actual drawing */ 812 for (i = 0; i < nr_prims; i++) { 813 info.mode = translate_prim( ctx, prims[i].mode ); 814 info.start = prims[i].start; 815 info.count = prims[i].count; 816 info.instance_count = prims[i].num_instances; 817 info.index_bias = prims[i].basevertex; 818 if (!ib) { 819 info.min_index = info.start; 820 info.max_index = info.start + info.count - 1; 821 } 822 823 if (info.count_from_stream_output) { 824 cso_draw_vbo(st->cso_context, &info); 825 } 826 else if (info.primitive_restart) { 827 /* don't trim, restarts might be inside index list */ 828 cso_draw_vbo(st->cso_context, &info); 829 } 830 else if (u_trim_pipe_prim(info.mode, &info.count)) 831 cso_draw_vbo(st->cso_context, &info); 832 } 833 834 if (ib && st->indexbuf_uploader && !_mesa_is_bufferobj(ib->obj)) { 835 pipe_resource_reference(&ibuffer.buffer, NULL); 836 } 837} 838 839 840void 841st_init_draw(struct st_context *st) 842{ 843 struct gl_context *ctx = st->ctx; 844 845 vbo_set_draw_func(ctx, st_draw_vbo); 846 847#if FEATURE_feedback || FEATURE_rastpos 848 st->draw = draw_create(st->pipe); /* for selection/feedback */ 849 850 /* Disable draw options that might convert points/lines to tris, etc. 851 * as that would foul-up feedback/selection mode. 852 */ 853 draw_wide_line_threshold(st->draw, 1000.0f); 854 draw_wide_point_threshold(st->draw, 1000.0f); 855 draw_enable_line_stipple(st->draw, FALSE); 856 draw_enable_point_sprites(st->draw, FALSE); 857#endif 858} 859 860 861void 862st_destroy_draw(struct st_context *st) 863{ 864#if FEATURE_feedback || FEATURE_rastpos 865 draw_destroy(st->draw); 866#endif 867} 868