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   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   */
  32
  33 #include "main/imports.h"
  34 #include "main/image.h"
  35 #include "main/macros.h"
  36 #include "shader/prog_uniform.h"
  37
  38 #include "vbo/vbo.h"
  39
  40 #include "st_context.h"
  41 #include "st_atom.h"
  42 #include "st_cb_bufferobjects.h"
  43 #include "st_draw.h"
  44 #include "st_program.h"
  45
  46 #include "pipe/p_context.h"
  47 #include "pipe/p_defines.h"
  48 #include "pipe/p_inlines.h"
  49
  50
  51 static GLuint double_types[4] = {
  52    PIPE_FORMAT_R64_FLOAT,
  53    PIPE_FORMAT_R64G64_FLOAT,
  54    PIPE_FORMAT_R64G64B64_FLOAT,
  55    PIPE_FORMAT_R64G64B64A64_FLOAT
  56 };
  57
  58 static GLuint float_types[4] = {
  59    PIPE_FORMAT_R32_FLOAT,
  60    PIPE_FORMAT_R32G32_FLOAT,
  61    PIPE_FORMAT_R32G32B32_FLOAT,
  62    PIPE_FORMAT_R32G32B32A32_FLOAT
  63 };
  64
  65 static GLuint uint_types_norm[4] = {
  66    PIPE_FORMAT_R32_UNORM,
  67    PIPE_FORMAT_R32G32_UNORM,
  68    PIPE_FORMAT_R32G32B32_UNORM,
  69    PIPE_FORMAT_R32G32B32A32_UNORM
  70 };
  71
  72 static GLuint uint_types_scale[4] = {
  73    PIPE_FORMAT_R32_USCALED,
  74    PIPE_FORMAT_R32G32_USCALED,
  75    PIPE_FORMAT_R32G32B32_USCALED,
  76    PIPE_FORMAT_R32G32B32A32_USCALED
  77 };
  78
  79 static GLuint int_types_norm[4] = {
  80    PIPE_FORMAT_R32_SNORM,
  81    PIPE_FORMAT_R32G32_SNORM,
  82    PIPE_FORMAT_R32G32B32_SNORM,
  83    PIPE_FORMAT_R32G32B32A32_SNORM
  84 };
  85
  86 static GLuint int_types_scale[4] = {
  87    PIPE_FORMAT_R32_SSCALED,
  88    PIPE_FORMAT_R32G32_SSCALED,
  89    PIPE_FORMAT_R32G32B32_SSCALED,
  90    PIPE_FORMAT_R32G32B32A32_SSCALED
  91 };
  92
  93 static GLuint ushort_types_norm[4] = {
  94    PIPE_FORMAT_R16_UNORM,
  95    PIPE_FORMAT_R16G16_UNORM,
  96    PIPE_FORMAT_R16G16B16_UNORM,
  97    PIPE_FORMAT_R16G16B16A16_UNORM
  98 };
  99
 100 static GLuint ushort_types_scale[4] = {
 101    PIPE_FORMAT_R16_USCALED,
 102    PIPE_FORMAT_R16G16_USCALED,
 103    PIPE_FORMAT_R16G16B16_USCALED,
 104    PIPE_FORMAT_R16G16B16A16_USCALED
 105 };
 106
 107 static GLuint short_types_norm[4] = {
 108    PIPE_FORMAT_R16_SNORM,
 109    PIPE_FORMAT_R16G16_SNORM,
 110    PIPE_FORMAT_R16G16B16_SNORM,
 111    PIPE_FORMAT_R16G16B16A16_SNORM
 112 };
 113
 114 static GLuint short_types_scale[4] = {
 115    PIPE_FORMAT_R16_SSCALED,
 116    PIPE_FORMAT_R16G16_SSCALED,
 117    PIPE_FORMAT_R16G16B16_SSCALED,
 118    PIPE_FORMAT_R16G16B16A16_SSCALED
 119 };
 120
 121 static GLuint ubyte_types_norm[4] = {
 122    PIPE_FORMAT_R8_UNORM,
 123    PIPE_FORMAT_R8G8_UNORM,
 124    PIPE_FORMAT_R8G8B8_UNORM,
 125    PIPE_FORMAT_R8G8B8A8_UNORM
 126 };
 127
 128 static GLuint ubyte_types_scale[4] = {
 129    PIPE_FORMAT_R8_USCALED,
 130    PIPE_FORMAT_R8G8_USCALED,
 131    PIPE_FORMAT_R8G8B8_USCALED,
 132    PIPE_FORMAT_R8G8B8A8_USCALED
 133 };
 134
 135 static GLuint byte_types_norm[4] = {
 136    PIPE_FORMAT_R8_SNORM,
 137    PIPE_FORMAT_R8G8_SNORM,
 138    PIPE_FORMAT_R8G8B8_SNORM,
 139    PIPE_FORMAT_R8G8B8A8_SNORM
 140 };
 141
 142 static GLuint byte_types_scale[4] = {
 143    PIPE_FORMAT_R8_SSCALED,
 144    PIPE_FORMAT_R8G8_SSCALED,
 145    PIPE_FORMAT_R8G8B8_SSCALED,
 146    PIPE_FORMAT_R8G8B8A8_SSCALED
 147 };
 148
 149 static GLuint fixed_types[4] = {
 150    PIPE_FORMAT_R32_FIXED,
 151    PIPE_FORMAT_R32G32_FIXED,
 152    PIPE_FORMAT_R32G32B32_FIXED,
 153    PIPE_FORMAT_R32G32B32A32_FIXED
 154 };
 155
 156
 157
 158 /**
 159  * Return a PIPE_FORMAT_x for the given GL datatype and size.
 160  */
 161 GLuint
 162 st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
 163                       GLboolean normalized)
 164 {
 165    assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
 166           type == GL_FIXED);
 167    assert(size >= 1);
 168    assert(size <= 4);
 169    assert(format == GL_RGBA || format == GL_BGRA);
 170
 171    if (format == GL_BGRA) {
 172       /* this is an odd-ball case */
 173       assert(type == GL_UNSIGNED_BYTE);
 174       assert(normalized);
 175       return PIPE_FORMAT_B8G8R8A8_UNORM;
 176    }
 177
 178    if (normalized) {
 179       switch (type) {
 180       case GL_DOUBLE: return double_types[size-1];
 181       case GL_FLOAT: return float_types[size-1];
 182       case GL_INT: return int_types_norm[size-1];
 183       case GL_SHORT: return short_types_norm[size-1];
 184       case GL_BYTE: return byte_types_norm[size-1];
 185       case GL_UNSIGNED_INT: return uint_types_norm[size-1];
 186       case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
 187       case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
 188       case GL_FIXED: return fixed_types[size-1];
 189       default: assert(0); return 0;
 190       }
 191    }
 192    else {
 193       switch (type) {
 194       case GL_DOUBLE: return double_types[size-1];
 195       case GL_FLOAT: return float_types[size-1];
 196       case GL_INT: return int_types_scale[size-1];
 197       case GL_SHORT: return short_types_scale[size-1];
 198       case GL_BYTE: return byte_types_scale[size-1];
 199       case GL_UNSIGNED_INT: return uint_types_scale[size-1];
 200       case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
 201       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
 202       case GL_FIXED: return fixed_types[size-1];
 203       default: assert(0); return 0;
 204       }
 205    }
 206    return 0; /* silence compiler warning */
 207 }
 208
 209
 210 /*
 211  * If edge flags are needed, setup an bitvector of flags and call
 212  * pipe->set_edgeflags().
 213  * XXX memleak: need to free the returned pointer at some point
 214  */
 215 static void *
 216 setup_edgeflags(GLcontext *ctx, GLenum primMode, GLint start, GLint count,
 217                 const struct gl_client_array *array)
 218 {
 219    struct pipe_context *pipe = ctx->st->pipe;
 220
 221    if ((primMode == GL_TRIANGLES ||
 222         primMode == GL_QUADS ||
 223         primMode == GL_POLYGON) &&
 224        (ctx->Polygon.FrontMode != GL_FILL ||
 225         ctx->Polygon.BackMode != GL_FILL)) {
 226       /* need edge flags */
 227       GLint i;
 228       unsigned *vec;
 229       struct st_buffer_object *stobj = st_buffer_object(array->BufferObj);
 230       ubyte *map;
 231
 232       if (!stobj || stobj->Base.Name == 0) {
 233          /* edge flags are not in a VBO */
 234          return NULL;
 235       }
 236
 237       vec = (unsigned *) _mesa_calloc(sizeof(unsigned) * ((count + 31) / 32));
 238       if (!vec)
 239          return NULL;
 240
 241       map = pipe_buffer_map(pipe->screen, stobj->buffer, PIPE_BUFFER_USAGE_CPU_READ);
 242       map = ADD_POINTERS(map, array->Ptr);
 243
 244       for (i = 0; i < count; i++) {
 245          if (*((float *) map))
 246             vec[i/32] |= 1 << (i % 32);
 247
 248          map += array->StrideB;
 249       }
 250
 251       pipe_buffer_unmap(pipe->screen, stobj->buffer);
 252
 253       pipe->set_edgeflags(pipe, vec);
 254
 255       return vec;
 256    }
 257    else {
 258       /* edge flags not needed */
 259       pipe->set_edgeflags(pipe, NULL);
 260       return NULL;
 261    }
 262 }
 263
 264
 265 /**
 266  * Examine the active arrays to determine if we have interleaved
 267  * vertex arrays all living in one VBO, or all living in user space.
 268  * \param userSpace  returns whether the arrays are in user space.
 269  */
 270 static GLboolean
 271 is_interleaved_arrays(const struct st_vertex_program *vp,
 272                       const struct gl_client_array **arrays,
 273                       GLboolean *userSpace)
 274 {
 275    GLuint attr;
 276    const struct gl_buffer_object *firstBufObj = NULL;
 277    GLint firstStride = -1;
 278    GLuint num_client_arrays = 0;
 279    const GLubyte *client_addr = NULL;
 280
 281    for (attr = 0; attr < vp->num_inputs; attr++) {
 282       const GLuint mesaAttr = vp->index_to_input[attr];
 283       const struct gl_buffer_object *bufObj = arrays[mesaAttr]->BufferObj;
 284       const GLsizei stride = arrays[mesaAttr]->StrideB; /* in bytes */
 285
 286       if (firstStride < 0) {
 287          firstStride = stride;
 288       }
 289       else if (firstStride != stride) {
 290          return GL_FALSE;
 291       }
 292
 293       if (!bufObj || !bufObj->Name) {
 294          num_client_arrays++;
 295          /* Try to detect if the client-space arrays are
 296           * "close" to each other.
 297           */
 298          if (!client_addr) {
 299             client_addr = arrays[mesaAttr]->Ptr;
 300          }
 301          else if (abs(arrays[mesaAttr]->Ptr - client_addr) > firstStride) {
 302             /* arrays start too far apart */
 303             return GL_FALSE;
 304          }
 305       }
 306       else if (!firstBufObj) {
 307          firstBufObj = bufObj;
 308       }
 309       else if (bufObj != firstBufObj) {
 310          return GL_FALSE;
 311       }
 312    }
 313
 314    *userSpace = (num_client_arrays == vp->num_inputs);
 315    /* printf("user space: %d (%d %d)\n", (int) *userSpace,num_client_arrays,vp->num_inputs); */
 316
 317    return GL_TRUE;
 318 }
 319
 320
 321 /**
 322  * Compute the memory range occupied by the arrays.
 323  */
 324 static void
 325 get_arrays_bounds(const struct st_vertex_program *vp,
 326                        const struct gl_client_array **arrays,
 327                        GLuint max_index,
 328                        const GLubyte **low, const GLubyte **high)
 329 {
 330    const GLubyte *low_addr = NULL;
 331    GLuint attr;
 332    GLint stride;
 333
 334    for (attr = 0; attr < vp->num_inputs; attr++) {
 335       const GLuint mesaAttr = vp->index_to_input[attr];
 336       const GLubyte *start = arrays[mesaAttr]->Ptr;
 337       stride = arrays[mesaAttr]->StrideB;
 338       if (attr == 0) {
 339          low_addr = start;
 340       }
 341       else {
 342          low_addr = MIN2(low_addr, start);
 343       }
 344    }
 345
 346    *low = low_addr;
 347    *high = low_addr + (max_index + 1) * stride;
 348 }
 349
 350
 351 /**
 352  * Set up for drawing interleaved arrays that all live in one VBO
 353  * or all live in user space.
 354  * \param vbuffer  returns vertex buffer info
 355  * \param velements  returns vertex element info
 356  */
 357 static void
 358 setup_interleaved_attribs(GLcontext *ctx,
 359                           const struct st_vertex_program *vp,
 360                           const struct gl_client_array **arrays,
 361                           GLuint max_index,
 362                           GLboolean userSpace,
 363                           struct pipe_vertex_buffer *vbuffer,
 364                           struct pipe_vertex_element velements[])
 365 {
 366    struct pipe_context *pipe = ctx->st->pipe;
 367    GLuint attr;
 368    const GLubyte *offset0;
 369
 370    for (attr = 0; attr < vp->num_inputs; attr++) {
 371       const GLuint mesaAttr = vp->index_to_input[attr];
 372       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 373       struct st_buffer_object *stobj = st_buffer_object(bufobj);
 374       GLsizei stride = arrays[mesaAttr]->StrideB;
 375
 376       /*printf("stobj %u = %p\n", attr, (void*)stobj);*/
 377
 378       if (attr == 0) {
 379          const GLubyte *low, *high;
 380
 381          get_arrays_bounds(vp, arrays, max_index, &low, &high);
 382          /*printf("buffer range: %p %p  %d\n", low, high, high-low);*/
 383
 384          offset0 = low;
 385          if (userSpace) {
 386             vbuffer->buffer =
 387                pipe_user_buffer_create(pipe->screen, (void *) low, high - low);
 388             vbuffer->buffer_offset = 0;
 389          }
 390          else {
 391             vbuffer->buffer = NULL;
 392             pipe_buffer_reference(&vbuffer->buffer, stobj->buffer);
 393             vbuffer->buffer_offset = pointer_to_offset(low);
 394          }
 395          vbuffer->stride = stride; /* in bytes */
 396          vbuffer->max_index = max_index;
 397       }
 398
 399       velements[attr].src_offset =
 400          (unsigned) (arrays[mesaAttr]->Ptr - offset0);
 401       velements[attr].vertex_buffer_index = 0;
 402       velements[attr].nr_components = arrays[mesaAttr]->Size;
 403       velements[attr].src_format =
 404          st_pipe_vertex_format(arrays[mesaAttr]->Type,
 405                                arrays[mesaAttr]->Size,
 406                                arrays[mesaAttr]->Format,
 407                                arrays[mesaAttr]->Normalized);
 408       assert(velements[attr].src_format);
 409    }
 410 }
 411
 412
 413 /**
 414  * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
 415  * vertex attribute.
 416  * \param vbuffer  returns vertex buffer info
 417  * \param velements  returns vertex element info
 418  */
 419 static void
 420 setup_non_interleaved_attribs(GLcontext *ctx,
 421                               const struct st_vertex_program *vp,
 422                               const struct gl_client_array **arrays,
 423                               GLuint max_index,
 424                               GLboolean *userSpace,
 425                               struct pipe_vertex_buffer vbuffer[],
 426                               struct pipe_vertex_element velements[])
 427 {
 428    struct pipe_context *pipe = ctx->st->pipe;
 429    GLuint attr;
 430
 431    for (attr = 0; attr < vp->num_inputs; attr++) {
 432       const GLuint mesaAttr = vp->index_to_input[attr];
 433       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 434       GLsizei stride = arrays[mesaAttr]->StrideB;
 435
 436       *userSpace = GL_FALSE;
 437
 438       if (bufobj && bufobj->Name) {
 439          /* Attribute data is in a VBO.
 440           * Recall that for VBOs, the gl_client_array->Ptr field is
 441           * really an offset from the start of the VBO, not a pointer.
 442           */
 443          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 444          assert(stobj->buffer);
 445          /*printf("stobj %u = %p\n", attr, (void*) stobj);*/
 446
 447          vbuffer[attr].buffer = NULL;
 448          pipe_buffer_reference(&vbuffer[attr].buffer, stobj->buffer);
 449          vbuffer[attr].buffer_offset = pointer_to_offset(arrays[mesaAttr]->Ptr);
 450          velements[attr].src_offset = 0;
 451       }
 452       else {
 453          /* attribute data is in user-space memory, not a VBO */
 454          uint bytes;
 455          /*printf("user-space array %d stride %d\n", attr, stride);*/
 456
 457          *userSpace = GL_TRUE;
 458
 459          /* wrap user data */
 460          if (arrays[mesaAttr]->Ptr) {
 461             /* user's vertex array */
 462             if (arrays[mesaAttr]->StrideB) {
 463                bytes = arrays[mesaAttr]->StrideB * (max_index + 1);
 464             }
 465             else {
 466                bytes = arrays[mesaAttr]->Size
 467                   * _mesa_sizeof_type(arrays[mesaAttr]->Type);
 468             }
 469             vbuffer[attr].buffer = pipe_user_buffer_create(pipe->screen,
 470                            (void *) arrays[mesaAttr]->Ptr, bytes);
 471          }
 472          else {
 473             /* no array, use ctx->Current.Attrib[] value */
 474             bytes = sizeof(ctx->Current.Attrib[0]);
 475             vbuffer[attr].buffer = pipe_user_buffer_create(pipe->screen,
 476                            (void *) ctx->Current.Attrib[mesaAttr], bytes);
 477             stride = 0;
 478          }
 479
 480          vbuffer[attr].buffer_offset = 0;
 481          velements[attr].src_offset = 0;
 482       }
 483
 484       assert(velements[attr].src_offset <= 2048); /* 11-bit field */
 485
 486       /* common-case setup */
 487       vbuffer[attr].stride = stride; /* in bytes */
 488       vbuffer[attr].max_index = max_index;
 489       velements[attr].vertex_buffer_index = attr;
 490       velements[attr].nr_components = arrays[mesaAttr]->Size;
 491       velements[attr].src_format
 492          = st_pipe_vertex_format(arrays[mesaAttr]->Type,
 493                                  arrays[mesaAttr]->Size,
 494                                  arrays[mesaAttr]->Format,
 495                                  arrays[mesaAttr]->Normalized);
 496       assert(velements[attr].src_format);
 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  */
 507 static void
 508 check_uniforms(GLcontext *ctx)
 509 {
 510    const struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;
 511    if (shProg && shProg->LinkStatus) {
 512       GLuint i;
 513       for (i = 0; i < shProg->Uniforms->NumUniforms; i++) {
 514          const struct gl_uniform *u = &shProg->Uniforms->Uniforms[i];
 515          if (!u->Initialized) {
 516             _mesa_warning(ctx,
 517                           "Using shader with uninitialized uniform: %s",
 518                           u->Name);
 519          }
 520       }
 521    }
 522 }
 523
 524
 525 /**
 526  * This function gets plugged into the VBO module and is called when
 527  * we have something to render.
 528  * Basically, translate the information into the format expected by gallium.
 529  */
 530 void
 531 st_draw_vbo(GLcontext *ctx,
 532             const struct gl_client_array **arrays,
 533             const struct _mesa_prim *prims,
 534             GLuint nr_prims,
 535             const struct _mesa_index_buffer *ib,
 536             GLboolean index_bounds_valid,
 537             GLuint min_index,
 538             GLuint max_index)
 539 {
 540    struct pipe_context *pipe = ctx->st->pipe;
 541    const struct st_vertex_program *vp;
 542    const struct pipe_shader_state *vs;
 543    struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
 544    GLuint attr;
 545    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 546    unsigned num_vbuffers, num_velements;
 547    GLboolean userSpace;
 548
 549    /* Gallium probably doesn't want this in some cases. */
 550    if (!index_bounds_valid)
 551       vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
 552
 553    /* sanity check for pointer arithmetic below */
 554    assert(sizeof(arrays[0]->Ptr[0]) == 1);
 555
 556    st_validate_state(ctx->st);
 557
 558    /* must get these after state validation! */
 559    vp = ctx->st->vp;
 560    vs = &ctx->st->vp->state;
 561
 562 #if 0
 563    if (MESA_VERBOSE & VERBOSE_GLSL) {
 564       check_uniforms(ctx);
 565    }
 566 #else
 567    (void) check_uniforms;
 568 #endif
 569
 570    /*
 571     * Setup the vbuffer[] and velements[] arrays.
 572     */
 573    if (is_interleaved_arrays(vp, arrays, &userSpace)) {
 574       /*printf("Draw interleaved\n");*/
 575       setup_interleaved_attribs(ctx, vp, arrays, max_index, userSpace,
 576                                 vbuffer, velements);
 577       num_vbuffers = 1;
 578       num_velements = vp->num_inputs;
 579       if (num_velements == 0)
 580          num_vbuffers = 0;
 581    }
 582    else {
 583       /*printf("Draw non-interleaved\n");*/
 584       setup_non_interleaved_attribs(ctx, vp, arrays, max_index,
 585                                     &userSpace, vbuffer, velements);
 586       num_vbuffers = vp->num_inputs;
 587       num_velements = vp->num_inputs;
 588    }
 589
 590 #if 0
 591    {
 592       GLuint i;
 593       for (i = 0; i < num_vbuffers; i++) {
 594          printf("buffers[%d].stride = %u\n", i, vbuffer[i].stride);
 595          printf("buffers[%d].max_index = %u\n", i, vbuffer[i].max_index);
 596          printf("buffers[%d].buffer_offset = %u\n", i, vbuffer[i].buffer_offset);
 597          printf("buffers[%d].buffer = %p\n", i, (void*) vbuffer[i].buffer);
 598       }
 599       for (i = 0; i < num_velements; i++) {
 600          printf("vlements[%d].vbuffer_index = %u\n", i, velements[i].vertex_buffer_index);
 601          printf("vlements[%d].src_offset = %u\n", i, velements[i].src_offset);
 602          printf("vlements[%d].nr_comps = %u\n", i, velements[i].nr_components);
 603          printf("vlements[%d].format = %s\n", i, pf_name(velements[i].src_format));
 604       }
 605    }
 606 #endif
 607
 608    pipe->set_vertex_buffers(pipe, num_vbuffers, vbuffer);
 609    pipe->set_vertex_elements(pipe, num_velements, velements);
 610
 611    if (num_vbuffers == 0 || num_velements == 0)
 612       return;
 613
 614    /* do actual drawing */
 615    if (ib) {
 616       /* indexed primitive */
 617       struct gl_buffer_object *bufobj = ib->obj;
 618       struct pipe_buffer *indexBuf = NULL;
 619       unsigned indexSize, indexOffset, i;
 620
 621       switch (ib->type) {
 622       case GL_UNSIGNED_INT:
 623          indexSize = 4;
 624          break;
 625       case GL_UNSIGNED_SHORT:
 626          indexSize = 2;
 627          break;
 628       case GL_UNSIGNED_BYTE:
 629          indexSize = 1;
 630          break;
 631       default:
 632          assert(0);
 633          return;
 634       }
 635
 636       /* get/create the index buffer object */
 637       if (bufobj && bufobj->Name) {
 638          /* elements/indexes are in a real VBO */
 639          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 640          pipe_buffer_reference(&indexBuf, stobj->buffer);
 641          indexOffset = pointer_to_offset(ib->ptr) / indexSize;
 642       }
 643       else {
 644          /* element/indicies are in user space memory */
 645          indexBuf = pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,
 646                                             ib->count * indexSize);
 647          indexOffset = 0;
 648       }
 649
 650       /* draw */
 651       if (nr_prims == 1 && pipe->draw_range_elements != NULL) {
 652          i = 0;
 653
 654          /* XXX: exercise temporary path to pass min/max directly
 655           * through to driver & draw module.  These interfaces still
 656           * need a bit of work...
 657           */
 658          setup_edgeflags(ctx, prims[i].mode,
 659                          prims[i].start + indexOffset, prims[i].count,
 660                          arrays[VERT_ATTRIB_EDGEFLAG]);
 661
 662          pipe->draw_range_elements(pipe, indexBuf, indexSize,
 663                                    min_index,
 664                                    max_index,
 665                                    prims[i].mode,
 666                                    prims[i].start + indexOffset, prims[i].count);
 667       }
 668       else {
 669          for (i = 0; i < nr_prims; i++) {
 670             setup_edgeflags(ctx, prims[i].mode,
 671                             prims[i].start + indexOffset, prims[i].count,
 672                             arrays[VERT_ATTRIB_EDGEFLAG]);
 673
 674             pipe->draw_elements(pipe, indexBuf, indexSize,
 675                                 prims[i].mode,
 676                                 prims[i].start + indexOffset, prims[i].count);
 677          }
 678       }
 679
 680       pipe_buffer_reference(&indexBuf, NULL);
 681    }
 682    else {
 683       /* non-indexed */
 684       GLuint i;
 685       for (i = 0; i < nr_prims; i++) {
 686          setup_edgeflags(ctx, prims[i].mode,
 687                          prims[i].start, prims[i].count,
 688                          arrays[VERT_ATTRIB_EDGEFLAG]);
 689
 690          pipe->draw_arrays(pipe, prims[i].mode, prims[i].start, prims[i].count);
 691       }
 692    }
 693
 694    /* unreference buffers (frees wrapped user-space buffer objects) */
 695    for (attr = 0; attr < num_vbuffers; attr++) {
 696       pipe_buffer_reference(&vbuffer[attr].buffer, NULL);
 697       assert(!vbuffer[attr].buffer);
 698    }
 699
 700    if (userSpace)
 701    {
 702       pipe->set_vertex_buffers(pipe, 0, NULL);
 703    }
 704 }
 705
 706
 707 void st_init_draw( struct st_context *st )
 708 {
 709    GLcontext *ctx = st->ctx;
 710
 711    vbo_set_draw_func(ctx, st_draw_vbo);
 712 }
 713
 714
 715 void st_destroy_draw( struct st_context *st )
 716 {
 717 }
 718
 719