src/mesa/state_tracker/st_draw.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  * 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_elements(), pipe->draw_range_elements() or pipe->draw_arrays().
  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/macros.h"
  46 #include "program/prog_uniform.h"
  47
  48 #include "vbo/vbo.h"
  49
  50 #include "st_context.h"
  51 #include "st_atom.h"
  52 #include "st_cb_bufferobjects.h"
  53 #include "st_draw.h"
  54 #include "st_program.h"
  55
  56 #include "pipe/p_context.h"
  57 #include "pipe/p_defines.h"
  58 #include "util/u_inlines.h"
  59 #include "util/u_format.h"
  60 #include "util/u_prim.h"
  61 #include "draw/draw_context.h"
  62 #include "cso_cache/cso_context.h"
  63
  64
  65 static GLuint double_types[4] = {
  66    PIPE_FORMAT_R64_FLOAT,
  67    PIPE_FORMAT_R64G64_FLOAT,
  68    PIPE_FORMAT_R64G64B64_FLOAT,
  69    PIPE_FORMAT_R64G64B64A64_FLOAT
  70 };
  71
  72 static GLuint float_types[4] = {
  73    PIPE_FORMAT_R32_FLOAT,
  74    PIPE_FORMAT_R32G32_FLOAT,
  75    PIPE_FORMAT_R32G32B32_FLOAT,
  76    PIPE_FORMAT_R32G32B32A32_FLOAT
  77 };
  78
  79 static GLuint half_float_types[4] = {
  80    PIPE_FORMAT_R16_FLOAT,
  81    PIPE_FORMAT_R16G16_FLOAT,
  82    PIPE_FORMAT_R16G16B16_FLOAT,
  83    PIPE_FORMAT_R16G16B16A16_FLOAT
  84 };
  85
  86 static GLuint uint_types_norm[4] = {
  87    PIPE_FORMAT_R32_UNORM,
  88    PIPE_FORMAT_R32G32_UNORM,
  89    PIPE_FORMAT_R32G32B32_UNORM,
  90    PIPE_FORMAT_R32G32B32A32_UNORM
  91 };
  92
  93 static GLuint uint_types_scale[4] = {
  94    PIPE_FORMAT_R32_USCALED,
  95    PIPE_FORMAT_R32G32_USCALED,
  96    PIPE_FORMAT_R32G32B32_USCALED,
  97    PIPE_FORMAT_R32G32B32A32_USCALED
  98 };
  99
 100 static GLuint int_types_norm[4] = {
 101    PIPE_FORMAT_R32_SNORM,
 102    PIPE_FORMAT_R32G32_SNORM,
 103    PIPE_FORMAT_R32G32B32_SNORM,
 104    PIPE_FORMAT_R32G32B32A32_SNORM
 105 };
 106
 107 static GLuint int_types_scale[4] = {
 108    PIPE_FORMAT_R32_SSCALED,
 109    PIPE_FORMAT_R32G32_SSCALED,
 110    PIPE_FORMAT_R32G32B32_SSCALED,
 111    PIPE_FORMAT_R32G32B32A32_SSCALED
 112 };
 113
 114 static GLuint ushort_types_norm[4] = {
 115    PIPE_FORMAT_R16_UNORM,
 116    PIPE_FORMAT_R16G16_UNORM,
 117    PIPE_FORMAT_R16G16B16_UNORM,
 118    PIPE_FORMAT_R16G16B16A16_UNORM
 119 };
 120
 121 static GLuint ushort_types_scale[4] = {
 122    PIPE_FORMAT_R16_USCALED,
 123    PIPE_FORMAT_R16G16_USCALED,
 124    PIPE_FORMAT_R16G16B16_USCALED,
 125    PIPE_FORMAT_R16G16B16A16_USCALED
 126 };
 127
 128 static GLuint short_types_norm[4] = {
 129    PIPE_FORMAT_R16_SNORM,
 130    PIPE_FORMAT_R16G16_SNORM,
 131    PIPE_FORMAT_R16G16B16_SNORM,
 132    PIPE_FORMAT_R16G16B16A16_SNORM
 133 };
 134
 135 static GLuint short_types_scale[4] = {
 136    PIPE_FORMAT_R16_SSCALED,
 137    PIPE_FORMAT_R16G16_SSCALED,
 138    PIPE_FORMAT_R16G16B16_SSCALED,
 139    PIPE_FORMAT_R16G16B16A16_SSCALED
 140 };
 141
 142 static GLuint ubyte_types_norm[4] = {
 143    PIPE_FORMAT_R8_UNORM,
 144    PIPE_FORMAT_R8G8_UNORM,
 145    PIPE_FORMAT_R8G8B8_UNORM,
 146    PIPE_FORMAT_R8G8B8A8_UNORM
 147 };
 148
 149 static GLuint ubyte_types_scale[4] = {
 150    PIPE_FORMAT_R8_USCALED,
 151    PIPE_FORMAT_R8G8_USCALED,
 152    PIPE_FORMAT_R8G8B8_USCALED,
 153    PIPE_FORMAT_R8G8B8A8_USCALED
 154 };
 155
 156 static GLuint byte_types_norm[4] = {
 157    PIPE_FORMAT_R8_SNORM,
 158    PIPE_FORMAT_R8G8_SNORM,
 159    PIPE_FORMAT_R8G8B8_SNORM,
 160    PIPE_FORMAT_R8G8B8A8_SNORM
 161 };
 162
 163 static GLuint byte_types_scale[4] = {
 164    PIPE_FORMAT_R8_SSCALED,
 165    PIPE_FORMAT_R8G8_SSCALED,
 166    PIPE_FORMAT_R8G8B8_SSCALED,
 167    PIPE_FORMAT_R8G8B8A8_SSCALED
 168 };
 169
 170 static GLuint fixed_types[4] = {
 171    PIPE_FORMAT_R32_FIXED,
 172    PIPE_FORMAT_R32G32_FIXED,
 173    PIPE_FORMAT_R32G32B32_FIXED,
 174    PIPE_FORMAT_R32G32B32A32_FIXED
 175 };
 176
 177
 178
 179 /**
 180  * Return a PIPE_FORMAT_x for the given GL datatype and size.
 181  */
 182 GLuint
 183 st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
 184                       GLboolean normalized)
 185 {
 186    assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
 187           type == GL_FIXED || type == GL_HALF_FLOAT);
 188    assert(size >= 1);
 189    assert(size <= 4);
 190    assert(format == GL_RGBA || format == GL_BGRA);
 191
 192    if (format == GL_BGRA) {
 193       /* this is an odd-ball case */
 194       assert(type == GL_UNSIGNED_BYTE);
 195       assert(normalized);
 196       return PIPE_FORMAT_B8G8R8A8_UNORM;
 197    }
 198
 199    if (normalized) {
 200       switch (type) {
 201       case GL_DOUBLE: return double_types[size-1];
 202       case GL_FLOAT: return float_types[size-1];
 203       case GL_HALF_FLOAT: return half_float_types[size-1];
 204       case GL_INT: return int_types_norm[size-1];
 205       case GL_SHORT: return short_types_norm[size-1];
 206       case GL_BYTE: return byte_types_norm[size-1];
 207       case GL_UNSIGNED_INT: return uint_types_norm[size-1];
 208       case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
 209       case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
 210       case GL_FIXED: return fixed_types[size-1];
 211       default: assert(0); return 0;
 212       }
 213    }
 214    else {
 215       switch (type) {
 216       case GL_DOUBLE: return double_types[size-1];
 217       case GL_FLOAT: return float_types[size-1];
 218       case GL_HALF_FLOAT: return half_float_types[size-1];
 219       case GL_INT: return int_types_scale[size-1];
 220       case GL_SHORT: return short_types_scale[size-1];
 221       case GL_BYTE: return byte_types_scale[size-1];
 222       case GL_UNSIGNED_INT: return uint_types_scale[size-1];
 223       case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
 224       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
 225       case GL_FIXED: return fixed_types[size-1];
 226       default: assert(0); return 0;
 227       }
 228    }
 229    return 0; /* silence compiler warning */
 230 }
 231
 232
 233
 234
 235
 236 /**
 237  * Examine the active arrays to determine if we have interleaved
 238  * vertex arrays all living in one VBO, or all living in user space.
 239  * \param userSpace  returns whether the arrays are in user space.
 240  */
 241 static GLboolean
 242 is_interleaved_arrays(const struct st_vertex_program *vp,
 243                       const struct st_vp_varient *vpv,
 244                       const struct gl_client_array **arrays,
 245                       GLboolean *userSpace)
 246 {
 247    GLuint attr;
 248    const struct gl_buffer_object *firstBufObj = NULL;
 249    GLint firstStride = -1;
 250    GLuint num_client_arrays = 0;
 251    const GLubyte *client_addr = NULL;
 252
 253    for (attr = 0; attr < vpv->num_inputs; attr++) {
 254       const GLuint mesaAttr = vp->index_to_input[attr];
 255       const struct gl_buffer_object *bufObj = arrays[mesaAttr]->BufferObj;
 256       const GLsizei stride = arrays[mesaAttr]->StrideB; /* in bytes */
 257
 258       if (firstStride < 0) {
 259          firstStride = stride;
 260       }
 261       else if (firstStride != stride) {
 262          return GL_FALSE;
 263       }
 264
 265       if (!bufObj || !bufObj->Name) {
 266          num_client_arrays++;
 267          /* Try to detect if the client-space arrays are
 268           * "close" to each other.
 269           */
 270          if (!client_addr) {
 271             client_addr = arrays[mesaAttr]->Ptr;
 272          }
 273          else if (abs(arrays[mesaAttr]->Ptr - client_addr) > firstStride) {
 274             /* arrays start too far apart */
 275             return GL_FALSE;
 276          }
 277       }
 278       else if (!firstBufObj) {
 279          firstBufObj = bufObj;
 280       }
 281       else if (bufObj != firstBufObj) {
 282          return GL_FALSE;
 283       }
 284    }
 285
 286    *userSpace = (num_client_arrays == vpv->num_inputs);
 287    /* debug_printf("user space: %s (%d arrays, %d inputs)\n",
 288       (int)*userSpace ? "Yes" : "No", num_client_arrays, vp->num_inputs); */
 289
 290    return GL_TRUE;
 291 }
 292
 293
 294 /**
 295  * Compute the memory range occupied by the arrays.
 296  */
 297 static void
 298 get_arrays_bounds(const struct st_vertex_program *vp,
 299                   const struct st_vp_varient *vpv,
 300                   const struct gl_client_array **arrays,
 301                   GLuint max_index,
 302                   const GLubyte **low, const GLubyte **high)
 303 {
 304    const GLubyte *low_addr = NULL;
 305    const GLubyte *high_addr = NULL;
 306    GLuint attr;
 307
 308    /* debug_printf("get_arrays_bounds: Handling %u attrs\n", vpv->num_inputs); */
 309
 310    for (attr = 0; attr < vpv->num_inputs; attr++) {
 311       const GLuint mesaAttr = vp->index_to_input[attr];
 312       const GLint stride = arrays[mesaAttr]->StrideB;
 313       const GLubyte *start = arrays[mesaAttr]->Ptr;
 314       const unsigned sz = (arrays[mesaAttr]->Size *
 315                            _mesa_sizeof_type(arrays[mesaAttr]->Type));
 316       const GLubyte *end = start + (max_index * stride) + sz;
 317
 318       /* debug_printf("attr %u: stride %d size %u start %p end %p\n",
 319          attr, stride, sz, start, end); */
 320
 321       if (attr == 0) {
 322          low_addr = start;
 323          high_addr = end;
 324       }
 325       else {
 326          low_addr = MIN2(low_addr, start);
 327          high_addr = MAX2(high_addr, end);
 328       }
 329    }
 330
 331    *low = low_addr;
 332    *high = high_addr;
 333 }
 334
 335
 336 /**
 337  * Set up for drawing interleaved arrays that all live in one VBO
 338  * or all live in user space.
 339  * \param vbuffer  returns vertex buffer info
 340  * \param velements  returns vertex element info
 341  */
 342 static void
 343 setup_interleaved_attribs(GLcontext *ctx,
 344                           const struct st_vertex_program *vp,
 345                           const struct st_vp_varient *vpv,
 346                           const struct gl_client_array **arrays,
 347                           GLuint max_index,
 348                           GLboolean userSpace,
 349                           struct pipe_vertex_buffer *vbuffer,
 350                           struct pipe_vertex_element velements[])
 351 {
 352    struct st_context *st = st_context(ctx);
 353    struct pipe_context *pipe = st->pipe;
 354    GLuint attr;
 355    const GLubyte *offset0 = NULL;
 356
 357    for (attr = 0; attr < vpv->num_inputs; attr++) {
 358       const GLuint mesaAttr = vp->index_to_input[attr];
 359       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 360       struct st_buffer_object *stobj = st_buffer_object(bufobj);
 361       GLsizei stride = arrays[mesaAttr]->StrideB;
 362
 363       /*printf("stobj %u = %p\n", attr, (void*)stobj);*/
 364
 365       if (attr == 0) {
 366          const GLubyte *low, *high;
 367
 368          get_arrays_bounds(vp, vpv, arrays, max_index, &low, &high);
 369          /* debug_printf("buffer range: %p %p range %d max index %u\n",
 370             low, high, high - low, max_index); */
 371
 372          offset0 = low;
 373          if (userSpace) {
 374             vbuffer->buffer =
 375                pipe_user_buffer_create(pipe->screen, (void *) low, high - low,
 376                                        PIPE_BIND_VERTEX_BUFFER);
 377             vbuffer->buffer_offset = 0;
 378          }
 379          else {
 380             vbuffer->buffer = NULL;
 381             pipe_resource_reference(&vbuffer->buffer, stobj->buffer);
 382             vbuffer->buffer_offset = pointer_to_offset(low);
 383          }
 384          vbuffer->stride = stride; /* in bytes */
 385          vbuffer->max_index = max_index;
 386       }
 387
 388       velements[attr].src_offset =
 389          (unsigned) (arrays[mesaAttr]->Ptr - offset0);
 390       velements[attr].instance_divisor = 0;
 391       velements[attr].vertex_buffer_index = 0;
 392       velements[attr].src_format =
 393          st_pipe_vertex_format(arrays[mesaAttr]->Type,
 394                                arrays[mesaAttr]->Size,
 395                                arrays[mesaAttr]->Format,
 396                                arrays[mesaAttr]->Normalized);
 397       assert(velements[attr].src_format);
 398    }
 399 }
 400
 401
 402 /**
 403  * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
 404  * vertex attribute.
 405  * \param vbuffer  returns vertex buffer info
 406  * \param velements  returns vertex element info
 407  */
 408 static void
 409 setup_non_interleaved_attribs(GLcontext *ctx,
 410                               const struct st_vertex_program *vp,
 411                               const struct st_vp_varient *vpv,
 412                               const struct gl_client_array **arrays,
 413                               GLuint max_index,
 414                               GLboolean *userSpace,
 415                               struct pipe_vertex_buffer vbuffer[],
 416                               struct pipe_vertex_element velements[])
 417 {
 418    struct st_context *st = st_context(ctx);
 419    struct pipe_context *pipe = st->pipe;
 420    GLuint attr;
 421
 422    for (attr = 0; attr < vpv->num_inputs; attr++) {
 423       const GLuint mesaAttr = vp->index_to_input[attr];
 424       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 425       GLsizei stride = arrays[mesaAttr]->StrideB;
 426
 427       *userSpace = GL_FALSE;
 428
 429       if (bufobj && bufobj->Name) {
 430          /* Attribute data is in a VBO.
 431           * Recall that for VBOs, the gl_client_array->Ptr field is
 432           * really an offset from the start of the VBO, not a pointer.
 433           */
 434          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 435          assert(stobj->buffer);
 436          /*printf("stobj %u = %p\n", attr, (void*) stobj);*/
 437
 438          vbuffer[attr].buffer = NULL;
 439          pipe_resource_reference(&vbuffer[attr].buffer, stobj->buffer);
 440          vbuffer[attr].buffer_offset = pointer_to_offset(arrays[mesaAttr]->Ptr);
 441          velements[attr].src_offset = 0;
 442       }
 443       else {
 444          /* attribute data is in user-space memory, not a VBO */
 445          uint bytes;
 446          /*printf("user-space array %d stride %d\n", attr, stride);*/
 447
 448          *userSpace = GL_TRUE;
 449
 450          /* wrap user data */
 451          if (arrays[mesaAttr]->Ptr) {
 452             /* user's vertex array */
 453             if (arrays[mesaAttr]->StrideB) {
 454                bytes = arrays[mesaAttr]->StrideB * (max_index + 1);
 455             }
 456             else {
 457                bytes = arrays[mesaAttr]->Size
 458                   * _mesa_sizeof_type(arrays[mesaAttr]->Type);
 459             }
 460             vbuffer[attr].buffer =
 461                pipe_user_buffer_create(pipe->screen,
 462                                        (void *) arrays[mesaAttr]->Ptr, bytes,
 463                                        PIPE_BIND_VERTEX_BUFFER);
 464          }
 465          else {
 466             /* no array, use ctx->Current.Attrib[] value */
 467             bytes = sizeof(ctx->Current.Attrib[0]);
 468             vbuffer[attr].buffer =
 469                pipe_user_buffer_create(pipe->screen,
 470                                        (void *) ctx->Current.Attrib[mesaAttr],
 471                                        bytes,
 472                                        PIPE_BIND_VERTEX_BUFFER);
 473             stride = 0;
 474          }
 475
 476          vbuffer[attr].buffer_offset = 0;
 477          velements[attr].src_offset = 0;
 478       }
 479
 480       assert(velements[attr].src_offset <= 2048); /* 11-bit field */
 481
 482       /* common-case setup */
 483       vbuffer[attr].stride = stride; /* in bytes */
 484       vbuffer[attr].max_index = max_index;
 485       velements[attr].instance_divisor = 0;
 486       velements[attr].vertex_buffer_index = attr;
 487       velements[attr].src_format
 488          = st_pipe_vertex_format(arrays[mesaAttr]->Type,
 489                                  arrays[mesaAttr]->Size,
 490                                  arrays[mesaAttr]->Format,
 491                                  arrays[mesaAttr]->Normalized);
 492       assert(velements[attr].src_format);
 493    }
 494 }
 495
 496
 497
 498 /**
 499  * Prior to drawing, check that any uniforms referenced by the
 500  * current shader have been set.  If a uniform has not been set,
 501  * issue a warning.
 502  */
 503 static void
 504 check_uniforms(GLcontext *ctx)
 505 {
 506    const struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;
 507    if (shProg && shProg->LinkStatus) {
 508       GLuint i;
 509       for (i = 0; i < shProg->Uniforms->NumUniforms; i++) {
 510          const struct gl_uniform *u = &shProg->Uniforms->Uniforms[i];
 511          if (!u->Initialized) {
 512             _mesa_warning(ctx,
 513                           "Using shader with uninitialized uniform: %s",
 514                           u->Name);
 515          }
 516       }
 517    }
 518 }
 519
 520
 521 /**
 522  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
 523  * the corresponding Gallium type.
 524  */
 525 static unsigned
 526 translate_prim(const GLcontext *ctx, unsigned prim)
 527 {
 528    /* GL prims should match Gallium prims, spot-check a few */
 529    assert(GL_POINTS == PIPE_PRIM_POINTS);
 530    assert(GL_QUADS == PIPE_PRIM_QUADS);
 531    assert(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 532
 533    /* Avoid quadstrips if it's easy to do so:
 534     * Note: it's imporant to do the correct trimming if we change the prim type!
 535     * We do that wherever this function is called.
 536     */
 537    if (prim == GL_QUAD_STRIP &&
 538        ctx->Light.ShadeModel != GL_FLAT &&
 539        ctx->Polygon.FrontMode == GL_FILL &&
 540        ctx->Polygon.BackMode == GL_FILL)
 541       prim = GL_TRIANGLE_STRIP;
 542
 543    return prim;
 544 }
 545
 546
 547
 548 /**
 549  * This function gets plugged into the VBO module and is called when
 550  * we have something to render.
 551  * Basically, translate the information into the format expected by gallium.
 552  */
 553 void
 554 st_draw_vbo(GLcontext *ctx,
 555             const struct gl_client_array **arrays,
 556             const struct _mesa_prim *prims,
 557             GLuint nr_prims,
 558             const struct _mesa_index_buffer *ib,
 559             GLboolean index_bounds_valid,
 560             GLuint min_index,
 561             GLuint max_index)
 562 {
 563    struct st_context *st = st_context(ctx);
 564    struct pipe_context *pipe = st->pipe;
 565    const struct st_vertex_program *vp;
 566    const struct st_vp_varient *vpv;
 567    struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
 568    GLuint attr;
 569    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 570    unsigned num_vbuffers, num_velements;
 571    GLboolean userSpace = GL_FALSE;
 572    GLboolean vertDataEdgeFlags;
 573
 574    /* Mesa core state should have been validated already */
 575    assert(ctx->NewState == 0x0);
 576
 577    /* Gallium probably doesn't want this in some cases. */
 578    if (!index_bounds_valid)
 579       if (!vbo_all_varyings_in_vbos(arrays))
 580          vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
 581
 582    /* sanity check for pointer arithmetic below */
 583    assert(sizeof(arrays[0]->Ptr[0]) == 1);
 584
 585    vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj &&
 586                        arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name;
 587    if (vertDataEdgeFlags != st->vertdata_edgeflags) {
 588       st->vertdata_edgeflags = vertDataEdgeFlags;
 589       st->dirty.st |= ST_NEW_EDGEFLAGS_DATA;
 590    }
 591
 592    st_validate_state(st);
 593
 594    /* must get these after state validation! */
 595    vp = st->vp;
 596    vpv = st->vp_varient;
 597
 598 #if 0
 599    if (MESA_VERBOSE & VERBOSE_GLSL) {
 600       check_uniforms(ctx);
 601    }
 602 #else
 603    (void) check_uniforms;
 604 #endif
 605
 606    memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs);
 607    /*
 608     * Setup the vbuffer[] and velements[] arrays.
 609     */
 610    if (is_interleaved_arrays(vp, vpv, arrays, &userSpace)) {
 611       /*printf("Draw interleaved\n");*/
 612       setup_interleaved_attribs(ctx, vp, vpv, arrays, max_index, userSpace,
 613                                 vbuffer, velements);
 614       num_vbuffers = 1;
 615       num_velements = vpv->num_inputs;
 616       if (num_velements == 0)
 617          num_vbuffers = 0;
 618    }
 619    else {
 620       /*printf("Draw non-interleaved\n");*/
 621       setup_non_interleaved_attribs(ctx, vp, vpv, arrays, max_index,
 622                                     &userSpace, vbuffer, velements);
 623       num_vbuffers = vpv->num_inputs;
 624       num_velements = vpv->num_inputs;
 625    }
 626
 627 #if 0
 628    {
 629       GLuint i;
 630       for (i = 0; i < num_vbuffers; i++) {
 631          printf("buffers[%d].stride = %u\n", i, vbuffer[i].stride);
 632          printf("buffers[%d].max_index = %u\n", i, vbuffer[i].max_index);
 633          printf("buffers[%d].buffer_offset = %u\n", i, vbuffer[i].buffer_offset);
 634          printf("buffers[%d].buffer = %p\n", i, (void*) vbuffer[i].buffer);
 635       }
 636       for (i = 0; i < num_velements; i++) {
 637          printf("vlements[%d].vbuffer_index = %u\n", i, velements[i].vertex_buffer_index);
 638          printf("vlements[%d].src_offset = %u\n", i, velements[i].src_offset);
 639          printf("vlements[%d].format = %s\n", i, util_format_name(velements[i].src_format));
 640       }
 641    }
 642 #endif
 643
 644    pipe->set_vertex_buffers(pipe, num_vbuffers, vbuffer);
 645    cso_set_vertex_elements(st->cso_context, num_velements, velements);
 646
 647    if (num_vbuffers == 0 || num_velements == 0)
 648       return;
 649
 650    /* do actual drawing */
 651    if (ib) {
 652       /* indexed primitive */
 653       struct gl_buffer_object *bufobj = ib->obj;
 654       struct pipe_resource *indexBuf = NULL;
 655       unsigned indexSize, indexOffset, i;
 656
 657       switch (ib->type) {
 658       case GL_UNSIGNED_INT:
 659          indexSize = 4;
 660          break;
 661       case GL_UNSIGNED_SHORT:
 662          indexSize = 2;
 663          break;
 664       case GL_UNSIGNED_BYTE:
 665          indexSize = 1;
 666          break;
 667       default:
 668          assert(0);
 669          return;
 670       }
 671
 672       /* get/create the index buffer object */
 673       if (bufobj && bufobj->Name) {
 674          /* elements/indexes are in a real VBO */
 675          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 676          pipe_resource_reference(&indexBuf, stobj->buffer);
 677          indexOffset = pointer_to_offset(ib->ptr) / indexSize;
 678       }
 679       else {
 680          /* element/indicies are in user space memory */
 681          indexBuf = pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,
 682                                             ib->count * indexSize,
 683                                             PIPE_BIND_INDEX_BUFFER);
 684          indexOffset = 0;
 685       }
 686
 687       /* draw */
 688       if (pipe->draw_range_elements && min_index != ~0 && max_index != ~0) {
 689          /* XXX: exercise temporary path to pass min/max directly
 690           * through to driver & draw module.  These interfaces still
 691           * need a bit of work...
 692           */
 693          for (i = 0; i < nr_prims; i++) {
 694             unsigned vcount = prims[i].count;
 695             unsigned prim = translate_prim(ctx, prims[i].mode);
 696
 697             if (u_trim_pipe_prim(prims[i].mode, &vcount)) {
 698                pipe->draw_range_elements(pipe, indexBuf, indexSize,
 699                                          prims[i].basevertex,
 700                                          min_index, max_index, prim,
 701                                          prims[i].start + indexOffset, vcount);
 702             }
 703          }
 704       }
 705       else {
 706          for (i = 0; i < nr_prims; i++) {
 707             unsigned vcount = prims[i].count;
 708             unsigned prim = translate_prim(ctx, prims[i].mode);
 709
 710             if (u_trim_pipe_prim(prims[i].mode, &vcount)) {
 711                if (prims[i].num_instances == 1) {
 712                   pipe->draw_elements(pipe, indexBuf,
 713                                       indexSize,
 714                                       prims[i].basevertex,
 715                                       prim,
 716                                       prims[i].start + indexOffset,
 717                                       vcount);
 718                }
 719                else {
 720                   pipe->draw_elements_instanced(pipe, indexBuf,
 721                                                 indexSize,
 722                                                 prims[i].basevertex,
 723                                                 prim,
 724                                                 prims[i].start + indexOffset,
 725                                                 vcount,
 726                                                 0, /* startInstance */
 727                                                 prims[i].num_instances);
 728                }
 729             }
 730          }
 731       }
 732
 733       pipe_resource_reference(&indexBuf, NULL);
 734    }
 735    else {
 736       /* non-indexed */
 737       GLuint i;
 738
 739       for (i = 0; i < nr_prims; i++) {
 740          unsigned vcount = prims[i].count;
 741          unsigned prim = translate_prim(ctx, prims[i].mode);
 742
 743          if (u_trim_pipe_prim(prims[i].mode, &vcount)) {
 744             if (prims[i].num_instances == 1) {
 745                pipe->draw_arrays(pipe, prim, prims[i].start, vcount);
 746             }
 747             else {
 748                pipe->draw_arrays_instanced(pipe, prim,
 749                                            prims[i].start,
 750                                            vcount,
 751                                            0, /* startInstance */
 752                                            prims[i].num_instances);
 753             }
 754          }
 755       }
 756    }
 757
 758    /* unreference buffers (frees wrapped user-space buffer objects) */
 759    for (attr = 0; attr < num_vbuffers; attr++) {
 760       pipe_resource_reference(&vbuffer[attr].buffer, NULL);
 761       assert(!vbuffer[attr].buffer);
 762    }
 763
 764    if (userSpace)
 765    {
 766       pipe->set_vertex_buffers(pipe, 0, NULL);
 767    }
 768 }
 769
 770
 771 void st_init_draw( struct st_context *st )
 772 {
 773    GLcontext *ctx = st->ctx;
 774
 775    vbo_set_draw_func(ctx, st_draw_vbo);
 776
 777 #if FEATURE_feedback || FEATURE_rastpos
 778    st->draw = draw_create(st->pipe); /* for selection/feedback */
 779
 780    /* Disable draw options that might convert points/lines to tris, etc.
 781     * as that would foul-up feedback/selection mode.
 782     */
 783    draw_wide_line_threshold(st->draw, 1000.0f);
 784    draw_wide_point_threshold(st->draw, 1000.0f);
 785    draw_enable_line_stipple(st->draw, FALSE);
 786    draw_enable_point_sprites(st->draw, FALSE);
 787 #endif
 788 }
 789
 790
 791 void st_destroy_draw( struct st_context *st )
 792 {
 793 #if FEATURE_feedback || FEATURE_rastpos
 794    draw_destroy(st->draw);
 795 #endif
 796 }
 797
 798