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