src/mesa/vbo/vbo_exec_array.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * Copyright 2009 VMware, Inc.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 #include "main/glheader.h"
  30 #include "main/context.h"
  31 #include "main/state.h"
  32 #include "main/api_validate.h"
  33 #include "main/api_noop.h"
  34 #include "main/varray.h"
  35 #include "main/bufferobj.h"
  36 #include "main/enums.h"
  37 #include "main/macros.h"
  38 #include "glapi/dispatch.h"
  39
  40 #include "vbo_context.h"
  41
  42
  43 /**
  44  * Compute min and max elements for glDraw[Range]Elements() calls.
  45  */
  46 void
  47 vbo_get_minmax_index(GLcontext *ctx,
  48                      const struct _mesa_prim *prim,
  49                      const struct _mesa_index_buffer *ib,
  50                      GLuint *min_index, GLuint *max_index)
  51 {
  52    GLuint i;
  53    GLsizei count = prim->count;
  54    const void *indices;
  55
  56    if (_mesa_is_bufferobj(ib->obj)) {
  57       const GLvoid *map = ctx->Driver.MapBuffer(ctx,
  58                                                 GL_ELEMENT_ARRAY_BUFFER_ARB,
  59                                                 GL_READ_ONLY,
  60                                                 ib->obj);
  61       indices = ADD_POINTERS(map, ib->ptr);
  62    } else {
  63       indices = ib->ptr;
  64    }
  65
  66    switch (ib->type) {
  67    case GL_UNSIGNED_INT: {
  68       const GLuint *ui_indices = (const GLuint *)indices;
  69       GLuint max_ui = ui_indices[count-1];
  70       GLuint min_ui = ui_indices[0];
  71       for (i = 0; i < count; i++) {
  72          if (ui_indices[i] > max_ui) max_ui = ui_indices[i];
  73          if (ui_indices[i] < min_ui) min_ui = ui_indices[i];
  74       }
  75       *min_index = min_ui;
  76       *max_index = max_ui;
  77       break;
  78    }
  79    case GL_UNSIGNED_SHORT: {
  80       const GLushort *us_indices = (const GLushort *)indices;
  81       GLuint max_us = us_indices[count-1];
  82       GLuint min_us = us_indices[0];
  83       for (i = 0; i < count; i++) {
  84          if (us_indices[i] > max_us) max_us = us_indices[i];
  85          if (us_indices[i] < min_us) min_us = us_indices[i];
  86       }
  87       *min_index = min_us;
  88       *max_index = max_us;
  89       break;
  90    }
  91    case GL_UNSIGNED_BYTE: {
  92       const GLubyte *ub_indices = (const GLubyte *)indices;
  93       GLuint max_ub = ub_indices[count-1];
  94       GLuint min_ub = ub_indices[0];
  95       for (i = 0; i < count; i++) {
  96          if (ub_indices[i] > max_ub) max_ub = ub_indices[i];
  97          if (ub_indices[i] < min_ub) min_ub = ub_indices[i];
  98       }
  99       *min_index = min_ub;
 100       *max_index = max_ub;
 101       break;
 102    }
 103    default:
 104       assert(0);
 105       break;
 106    }
 107
 108    if (_mesa_is_bufferobj(ib->obj)) {
 109       ctx->Driver.UnmapBuffer(ctx,
 110                               GL_ELEMENT_ARRAY_BUFFER_ARB,
 111                               ib->obj);
 112    }
 113 }
 114
 115
 116 /**
 117  * Check that element 'j' of the array has reasonable data.
 118  * Map VBO if needed.
 119  */
 120 static void
 121 check_array_data(GLcontext *ctx, struct gl_client_array *array,
 122                  GLuint attrib, GLuint j)
 123 {
 124    if (array->Enabled) {
 125       const void *data = array->Ptr;
 126       if (_mesa_is_bufferobj(array->BufferObj)) {
 127          if (!array->BufferObj->Pointer) {
 128             /* need to map now */
 129             array->BufferObj->Pointer = ctx->Driver.MapBuffer(ctx,
 130                                                               GL_ARRAY_BUFFER_ARB,
 131                                                               GL_READ_ONLY,
 132                                                               array->BufferObj);
 133          }
 134          data = ADD_POINTERS(data, array->BufferObj->Pointer);
 135       }
 136       switch (array->Type) {
 137       case GL_FLOAT:
 138          {
 139             GLfloat *f = (GLfloat *) ((GLubyte *) data + array->StrideB * j);
 140             GLuint k;
 141             for (k = 0; k < array->Size; k++) {
 142                if (IS_INF_OR_NAN(f[k]) ||
 143                    f[k] >= 1.0e20 || f[k] <= -1.0e10) {
 144                   _mesa_printf("Bad array data:\n");
 145                   _mesa_printf("  Element[%u].%u = %f\n", j, k, f[k]);
 146                   _mesa_printf("  Array %u at %p\n", attrib, (void* ) array);
 147                   _mesa_printf("  Type 0x%x, Size %d, Stride %d\n",
 148                                array->Type, array->Size, array->Stride);
 149                   _mesa_printf("  Address/offset %p in Buffer Object %u\n",
 150                                array->Ptr, array->BufferObj->Name);
 151                   f[k] = 1.0; /* XXX replace the bad value! */
 152                }
 153                //assert(!IS_INF_OR_NAN(f[k]));
 154             }
 155          }
 156          break;
 157       default:
 158          ;
 159       }
 160    }
 161 }
 162
 163
 164 /**
 165  * Unmap the buffer object referenced by given array, if mapped.
 166  */
 167 static void
 168 unmap_array_buffer(GLcontext *ctx, struct gl_client_array *array)
 169 {
 170    if (array->Enabled &&
 171        _mesa_is_bufferobj(array->BufferObj) &&
 172        _mesa_bufferobj_mapped(array->BufferObj)) {
 173       ctx->Driver.UnmapBuffer(ctx,
 174                               GL_ARRAY_BUFFER_ARB,
 175                               array->BufferObj);
 176    }
 177 }
 178
 179
 180 /**
 181  * Examine the array's data for NaNs, etc.
 182  */
 183 static void
 184 check_draw_elements_data(GLcontext *ctx, GLsizei count, GLenum elemType,
 185                          const void *elements, GLint basevertex)
 186 {
 187    struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
 188    const void *elemMap;
 189    GLint i, k;
 190
 191    if (_mesa_is_bufferobj(ctx->Array.ElementArrayBufferObj)) {
 192       elemMap = ctx->Driver.MapBuffer(ctx,
 193                                       GL_ELEMENT_ARRAY_BUFFER_ARB,
 194                                       GL_READ_ONLY,
 195                                       ctx->Array.ElementArrayBufferObj);
 196       elements = ADD_POINTERS(elements, elemMap);
 197    }
 198
 199    for (i = 0; i < count; i++) {
 200       GLuint j;
 201
 202       /* j = element[i] */
 203       switch (elemType) {
 204       case GL_UNSIGNED_BYTE:
 205          j = ((const GLubyte *) elements)[i];
 206          break;
 207       case GL_UNSIGNED_SHORT:
 208          j = ((const GLushort *) elements)[i];
 209          break;
 210       case GL_UNSIGNED_INT:
 211          j = ((const GLuint *) elements)[i];
 212          break;
 213       default:
 214          assert(0);
 215       }
 216
 217       /* check element j of each enabled array */
 218       check_array_data(ctx, &arrayObj->Vertex, VERT_ATTRIB_POS, j);
 219       check_array_data(ctx, &arrayObj->Normal, VERT_ATTRIB_NORMAL, j);
 220       check_array_data(ctx, &arrayObj->Color, VERT_ATTRIB_COLOR0, j);
 221       check_array_data(ctx, &arrayObj->SecondaryColor, VERT_ATTRIB_COLOR1, j);
 222       for (k = 0; k < Elements(arrayObj->TexCoord); k++) {
 223          check_array_data(ctx, &arrayObj->TexCoord[k], VERT_ATTRIB_TEX0 + k, j);
 224       }
 225       for (k = 0; k < Elements(arrayObj->VertexAttrib); k++) {
 226          check_array_data(ctx, &arrayObj->VertexAttrib[k], VERT_ATTRIB_GENERIC0 + k, j);
 227       }
 228    }
 229
 230    if (_mesa_is_bufferobj(ctx->Array.ElementArrayBufferObj)) {
 231       ctx->Driver.UnmapBuffer(ctx,
 232                               GL_ELEMENT_ARRAY_BUFFER_ARB,
 233                               ctx->Array.ElementArrayBufferObj);
 234    }
 235
 236    unmap_array_buffer(ctx, &arrayObj->Vertex);
 237    unmap_array_buffer(ctx, &arrayObj->Normal);
 238    unmap_array_buffer(ctx, &arrayObj->Color);
 239    for (k = 0; k < Elements(arrayObj->TexCoord); k++) {
 240       unmap_array_buffer(ctx, &arrayObj->TexCoord[k]);
 241    }
 242    for (k = 0; k < Elements(arrayObj->VertexAttrib); k++) {
 243       unmap_array_buffer(ctx, &arrayObj->VertexAttrib[k]);
 244    }
 245 }
 246
 247
 248 /**
 249  * Check array data, looking for NaNs, etc.
 250  */
 251 static void
 252 check_draw_arrays_data(GLcontext *ctx, GLint start, GLsizei count)
 253 {
 254    /* TO DO */
 255 }
 256
 257
 258 /**
 259  * Print info/data for glDrawArrays().
 260  */
 261 static void
 262 print_draw_arrays(GLcontext *ctx, struct vbo_exec_context *exec,
 263                   GLenum mode, GLint start, GLsizei count)
 264 {
 265    int i;
 266
 267    _mesa_printf("vbo_exec_DrawArrays(mode 0x%x, start %d, count %d):\n",
 268                 mode, start, count);
 269
 270    for (i = 0; i < 32; i++) {
 271       GLuint bufName = exec->array.inputs[i]->BufferObj->Name;
 272       GLint stride = exec->array.inputs[i]->Stride;
 273       _mesa_printf("attr %2d: size %d stride %d  enabled %d  "
 274                    "ptr %p  Bufobj %u\n",
 275                    i,
 276                    exec->array.inputs[i]->Size,
 277                    stride,
 278                    /*exec->array.inputs[i]->Enabled,*/
 279                    exec->array.legacy_array[i]->Enabled,
 280                    exec->array.inputs[i]->Ptr,
 281                    bufName);
 282
 283       if (bufName) {
 284          struct gl_buffer_object *buf = _mesa_lookup_bufferobj(ctx, bufName);
 285          GLubyte *p = ctx->Driver.MapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
 286                                             GL_READ_ONLY_ARB, buf);
 287          int offset = (int) (GLintptr) exec->array.inputs[i]->Ptr;
 288          float *f = (float *) (p + offset);
 289          int *k = (int *) f;
 290          int i;
 291          int n = (count * stride) / 4;
 292          if (n > 32)
 293             n = 32;
 294          _mesa_printf("  Data at offset %d:\n", offset);
 295          for (i = 0; i < n; i++) {
 296             _mesa_printf("    float[%d] = 0x%08x %f\n", i, k[i], f[i]);
 297          }
 298          ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB, buf);
 299       }
 300    }
 301 }
 302
 303
 304 /**
 305  * Just translate the arrayobj into a sane layout.
 306  */
 307 static void
 308 bind_array_obj(GLcontext *ctx)
 309 {
 310    struct vbo_context *vbo = vbo_context(ctx);
 311    struct vbo_exec_context *exec = &vbo->exec;
 312    struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
 313    GLuint i;
 314
 315    /* TODO: Fix the ArrayObj struct to keep legacy arrays in an array
 316     * rather than as individual named arrays.  Then this function can
 317     * go away.
 318     */
 319    exec->array.legacy_array[VERT_ATTRIB_POS] = &arrayObj->Vertex;
 320    exec->array.legacy_array[VERT_ATTRIB_WEIGHT] = &arrayObj->Weight;
 321    exec->array.legacy_array[VERT_ATTRIB_NORMAL] = &arrayObj->Normal;
 322    exec->array.legacy_array[VERT_ATTRIB_COLOR0] = &arrayObj->Color;
 323    exec->array.legacy_array[VERT_ATTRIB_COLOR1] = &arrayObj->SecondaryColor;
 324    exec->array.legacy_array[VERT_ATTRIB_FOG] = &arrayObj->FogCoord;
 325    exec->array.legacy_array[VERT_ATTRIB_COLOR_INDEX] = &arrayObj->Index;
 326    if (arrayObj->PointSize.Enabled) {
 327       /* this aliases COLOR_INDEX */
 328       exec->array.legacy_array[VERT_ATTRIB_POINT_SIZE] = &arrayObj->PointSize;
 329    }
 330    exec->array.legacy_array[VERT_ATTRIB_EDGEFLAG] = &arrayObj->EdgeFlag;
 331
 332    for (i = 0; i < Elements(arrayObj->TexCoord); i++)
 333       exec->array.legacy_array[VERT_ATTRIB_TEX0 + i] = &arrayObj->TexCoord[i];
 334
 335    for (i = 0; i < Elements(arrayObj->VertexAttrib); i++) {
 336       assert(i < Elements(exec->array.generic_array));
 337       exec->array.generic_array[i] = &arrayObj->VertexAttrib[i];
 338    }
 339
 340    exec->array.array_obj = arrayObj->Name;
 341 }
 342
 343
 344 static void
 345 recalculate_input_bindings(GLcontext *ctx)
 346 {
 347    struct vbo_context *vbo = vbo_context(ctx);
 348    struct vbo_exec_context *exec = &vbo->exec;
 349    const struct gl_client_array **inputs = &exec->array.inputs[0];
 350    GLbitfield const_inputs = 0x0;
 351    GLuint i;
 352
 353    exec->array.program_mode = get_program_mode(ctx);
 354    exec->array.enabled_flags = ctx->Array.ArrayObj->_Enabled;
 355
 356    switch (exec->array.program_mode) {
 357    case VP_NONE:
 358       /* When no vertex program is active (or the vertex program is generated
 359        * from fixed-function state).  We put the material values into the
 360        * generic slots.  This is the only situation where material values
 361        * are available as per-vertex attributes.
 362        */
 363       for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
 364          if (exec->array.legacy_array[i]->Enabled)
 365             inputs[i] = exec->array.legacy_array[i];
 366          else {
 367             inputs[i] = &vbo->legacy_currval[i];
 368             const_inputs |= 1 << i;
 369          }
 370       }
 371
 372       for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 373          inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->mat_currval[i];
 374          const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
 375       }
 376
 377       /* Could use just about anything, just to fill in the empty
 378        * slots:
 379        */
 380       for (i = MAT_ATTRIB_MAX; i < VERT_ATTRIB_MAX - VERT_ATTRIB_GENERIC0; i++) {
 381          inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];
 382          const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
 383       }
 384       break;
 385
 386    case VP_NV:
 387       /* NV_vertex_program - attribute arrays alias and override
 388        * conventional, legacy arrays.  No materials, and the generic
 389        * slots are vacant.
 390        */
 391       for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
 392          if (exec->array.generic_array[i]->Enabled)
 393             inputs[i] = exec->array.generic_array[i];
 394          else if (exec->array.legacy_array[i]->Enabled)
 395             inputs[i] = exec->array.legacy_array[i];
 396          else {
 397             inputs[i] = &vbo->legacy_currval[i];
 398             const_inputs |= 1 << i;
 399          }
 400       }
 401
 402       /* Could use just about anything, just to fill in the empty
 403        * slots:
 404        */
 405       for (i = VERT_ATTRIB_GENERIC0; i < VERT_ATTRIB_MAX; i++) {
 406          inputs[i] = &vbo->generic_currval[i - VERT_ATTRIB_GENERIC0];
 407          const_inputs |= 1 << i;
 408       }
 409       break;
 410
 411    case VP_ARB:
 412       /* GL_ARB_vertex_program or GLSL vertex shader - Only the generic[0]
 413        * attribute array aliases and overrides the legacy position array.
 414        *
 415        * Otherwise, legacy attributes available in the legacy slots,
 416        * generic attributes in the generic slots and materials are not
 417        * available as per-vertex attributes.
 418        */
 419       if (exec->array.generic_array[0]->Enabled)
 420          inputs[0] = exec->array.generic_array[0];
 421       else if (exec->array.legacy_array[0]->Enabled)
 422          inputs[0] = exec->array.legacy_array[0];
 423       else {
 424          inputs[0] = &vbo->legacy_currval[0];
 425          const_inputs |= 1 << 0;
 426       }
 427
 428       for (i = 1; i <= VERT_ATTRIB_TEX7; i++) {
 429          if (exec->array.legacy_array[i]->Enabled)
 430             inputs[i] = exec->array.legacy_array[i];
 431          else {
 432             inputs[i] = &vbo->legacy_currval[i];
 433             const_inputs |= 1 << i;
 434          }
 435       }
 436
 437       for (i = 0; i < MAX_VERTEX_GENERIC_ATTRIBS; i++) {
 438          if (exec->array.generic_array[i]->Enabled)
 439             inputs[VERT_ATTRIB_GENERIC0 + i] = exec->array.generic_array[i];
 440          else {
 441             inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];
 442             const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
 443          }
 444
 445       }
 446       break;
 447    }
 448
 449    _mesa_set_varying_vp_inputs( ctx, ~const_inputs );
 450 }
 451
 452
 453 static void
 454 bind_arrays(GLcontext *ctx)
 455 {
 456 #if 0
 457    if (ctx->Array.ArrayObj.Name != exec->array.array_obj) {
 458       bind_array_obj(ctx);
 459       recalculate_input_bindings(ctx);
 460    }
 461    else if (exec->array.program_mode != get_program_mode(ctx) ||
 462             exec->array.enabled_flags != ctx->Array.ArrayObj->_Enabled) {
 463
 464       recalculate_input_bindings(ctx);
 465    }
 466 #else
 467    bind_array_obj(ctx);
 468    recalculate_input_bindings(ctx);
 469 #endif
 470 }
 471
 472
 473
 474 /***********************************************************************
 475  * API functions.
 476  */
 477
 478 static void GLAPIENTRY
 479 vbo_exec_DrawArrays(GLenum mode, GLint start, GLsizei count)
 480 {
 481    GET_CURRENT_CONTEXT(ctx);
 482    struct vbo_context *vbo = vbo_context(ctx);
 483    struct vbo_exec_context *exec = &vbo->exec;
 484    struct _mesa_prim prim[1];
 485
 486    if (MESA_VERBOSE & VERBOSE_DRAW)
 487       _mesa_debug(ctx, "glDrawArrays(%s, %d, %d)\n",
 488                   _mesa_lookup_enum_by_nr(mode), start, count);
 489
 490    if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
 491       return;
 492
 493    FLUSH_CURRENT( ctx, 0 );
 494
 495    if (ctx->NewState)
 496       _mesa_update_state( ctx );
 497
 498    if (!_mesa_valid_to_render(ctx, "glDrawArrays")) {
 499       return;
 500    }
 501
 502 #if 0
 503    check_draw_arrays_data(ctx, start, count);
 504 #else
 505    (void) check_draw_arrays_data;
 506 #endif
 507
 508    bind_arrays( ctx );
 509
 510    /* Again... because we may have changed the bitmask of per-vertex varying
 511     * attributes.  If we regenerate the fixed-function vertex program now
 512     * we may be able to prune down the number of vertex attributes which we
 513     * need in the shader.
 514     */
 515    if (ctx->NewState)
 516       _mesa_update_state( ctx );
 517
 518    prim[0].begin = 1;
 519    prim[0].end = 1;
 520    prim[0].weak = 0;
 521    prim[0].pad = 0;
 522    prim[0].mode = mode;
 523    prim[0].start = start;
 524    prim[0].count = count;
 525    prim[0].indexed = 0;
 526    prim[0].basevertex = 0;
 527
 528    vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL,
 529                     GL_TRUE, start, start + count - 1 );
 530
 531 #if 0
 532    print_draw_arrays(ctx, exec, mode, start, count);
 533 #else
 534    (void) print_draw_arrays;
 535 #endif
 536 }
 537
 538
 539 /**
 540  * Map GL_ELEMENT_ARRAY_BUFFER and print contents.
 541  */
 542 static void
 543 dump_element_buffer(GLcontext *ctx, GLenum type)
 544 {
 545    const GLvoid *map = ctx->Driver.MapBuffer(ctx,
 546                                              GL_ELEMENT_ARRAY_BUFFER_ARB,
 547                                              GL_READ_ONLY,
 548                                              ctx->Array.ElementArrayBufferObj);
 549    switch (type) {
 550    case GL_UNSIGNED_BYTE:
 551       {
 552          const GLubyte *us = (const GLubyte *) map;
 553          GLuint i;
 554          for (i = 0; i < ctx->Array.ElementArrayBufferObj->Size; i++) {
 555             _mesa_printf("%02x ", us[i]);
 556             if (i % 32 == 31)
 557                _mesa_printf("\n");
 558          }
 559          _mesa_printf("\n");
 560       }
 561       break;
 562    case GL_UNSIGNED_SHORT:
 563       {
 564          const GLushort *us = (const GLushort *) map;
 565          GLuint i;
 566          for (i = 0; i < ctx->Array.ElementArrayBufferObj->Size / 2; i++) {
 567             _mesa_printf("%04x ", us[i]);
 568             if (i % 16 == 15)
 569                _mesa_printf("\n");
 570          }
 571          _mesa_printf("\n");
 572       }
 573       break;
 574    case GL_UNSIGNED_INT:
 575       {
 576          const GLuint *us = (const GLuint *) map;
 577          GLuint i;
 578          for (i = 0; i < ctx->Array.ElementArrayBufferObj->Size / 4; i++) {
 579             _mesa_printf("%08x ", us[i]);
 580             if (i % 8 == 7)
 581                _mesa_printf("\n");
 582          }
 583          _mesa_printf("\n");
 584       }
 585       break;
 586    default:
 587       ;
 588    }
 589
 590    ctx->Driver.UnmapBuffer(ctx,
 591                            GL_ELEMENT_ARRAY_BUFFER_ARB,
 592                            ctx->Array.ElementArrayBufferObj);
 593 }
 594
 595 /* Inner support for both _mesa_DrawElements and _mesa_DrawRangeElements */
 596 static void
 597 vbo_validated_drawrangeelements(GLcontext *ctx, GLenum mode,
 598                                 GLboolean index_bounds_valid,
 599                                 GLuint start, GLuint end,
 600                                 GLsizei count, GLenum type,
 601                                 const GLvoid *indices,
 602                                 GLint basevertex)
 603 {
 604    struct vbo_context *vbo = vbo_context(ctx);
 605    struct vbo_exec_context *exec = &vbo->exec;
 606    struct _mesa_index_buffer ib;
 607    struct _mesa_prim prim[1];
 608
 609    FLUSH_CURRENT( ctx, 0 );
 610
 611    if (ctx->NewState)
 612       _mesa_update_state( ctx );
 613
 614    if (!_mesa_valid_to_render(ctx, "glDraw[Range]Elements")) {
 615       return;
 616    }
 617
 618    if (ctx->NewState)
 619       _mesa_update_state( ctx );
 620
 621    bind_arrays( ctx );
 622
 623    ib.count = count;
 624    ib.type = type;
 625    ib.obj = ctx->Array.ElementArrayBufferObj;
 626    ib.ptr = indices;
 627
 628    prim[0].begin = 1;
 629    prim[0].end = 1;
 630    prim[0].weak = 0;
 631    prim[0].pad = 0;
 632    prim[0].mode = mode;
 633    prim[0].start = 0;
 634    prim[0].count = count;
 635    prim[0].indexed = 1;
 636    prim[0].basevertex = basevertex;
 637
 638    /* Need to give special consideration to rendering a range of
 639     * indices starting somewhere above zero.  Typically the
 640     * application is issuing multiple DrawRangeElements() to draw
 641     * successive primitives layed out linearly in the vertex arrays.
 642     * Unless the vertex arrays are all in a VBO (or locked as with
 643     * CVA), the OpenGL semantics imply that we need to re-read or
 644     * re-upload the vertex data on each draw call.
 645     *
 646     * In the case of hardware tnl, we want to avoid starting the
 647     * upload at zero, as it will mean every draw call uploads an
 648     * increasing amount of not-used vertex data.  Worse - in the
 649     * software tnl module, all those vertices might be transformed and
 650     * lit but never rendered.
 651     *
 652     * If we just upload or transform the vertices in start..end,
 653     * however, the indices will be incorrect.
 654     *
 655     * At this level, we don't know exactly what the requirements of
 656     * the backend are going to be, though it will likely boil down to
 657     * either:
 658     *
 659     * 1) Do nothing, everything is in a VBO and is processed once
 660     *       only.
 661     *
 662     * 2) Adjust the indices and vertex arrays so that start becomes
 663     *    zero.
 664     *
 665     * Rather than doing anything here, I'll provide a helper function
 666     * for the latter case elsewhere.
 667     */
 668
 669    vbo->draw_prims( ctx, exec->array.inputs, prim, 1, &ib,
 670                     index_bounds_valid, start, end );
 671 }
 672
 673 static void GLAPIENTRY
 674 vbo_exec_DrawRangeElementsBaseVertex(GLenum mode,
 675                                      GLuint start, GLuint end,
 676                                      GLsizei count, GLenum type,
 677                                      const GLvoid *indices,
 678                                      GLint basevertex)
 679 {
 680    static GLuint warnCount = 0;
 681    GET_CURRENT_CONTEXT(ctx);
 682
 683    if (MESA_VERBOSE & VERBOSE_DRAW)
 684       _mesa_debug(ctx,
 685                 "glDrawRangeElementsBaseVertex(%s, %u, %u, %d, %s, %p, %d)\n",
 686                 _mesa_lookup_enum_by_nr(mode), start, end, count,
 687                 _mesa_lookup_enum_by_nr(type), indices, basevertex);
 688
 689    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count,
 690                                           type, indices, basevertex ))
 691       return;
 692
 693    /* NOTE: It's important that 'end' is a reasonable value.
 694     * in _tnl_draw_prims(), we use end to determine how many vertices
 695     * to transform.  If it's too large, we can unnecessarily split prims
 696     * or we can read/write out of memory in several different places!
 697     */
 698
 699    if (end >= ctx->Array.ArrayObj->_MaxElement) {
 700       /* the max element is out of bounds of one or more enabled arrays */
 701       warnCount++;
 702
 703       if (warnCount < 10) {
 704          _mesa_warning(ctx, "glDraw[Range]Elements(start %u, end %u, count %d, "
 705                        "type 0x%x, indices=%p)\n"
 706                        "\tend is out of bounds (max=%u)  "
 707                        "Element Buffer %u (size %d)\n"
 708                        "\tThis should probably be fixed in the application.",
 709                        start, end, count, type, indices,
 710                        ctx->Array.ArrayObj->_MaxElement - 1,
 711                        ctx->Array.ElementArrayBufferObj->Name,
 712                        ctx->Array.ElementArrayBufferObj->Size);
 713       }
 714
 715       if (0)
 716          dump_element_buffer(ctx, type);
 717
 718       if (0)
 719          _mesa_print_arrays(ctx);
 720
 721 #ifdef DEBUG
 722       /* 'end' was out of bounds, but now let's check the actual array
 723        * indexes to see if any of them are out of bounds.  If so, warn
 724        * and skip the draw to avoid potential segfault, etc.
 725        */
 726       {
 727          GLuint max = _mesa_max_buffer_index(ctx, count, type, indices,
 728                                              ctx->Array.ElementArrayBufferObj);
 729          if (max >= ctx->Array.ArrayObj->_MaxElement) {
 730             if (warnCount < 10) {
 731                _mesa_warning(ctx, "glDraw[Range]Elements(start %u, end %u, "
 732                              "count %d, type 0x%x, indices=%p)\n"
 733                              "\tindex=%u is out of bounds (max=%u)  "
 734                              "Element Buffer %u (size %d)\n"
 735                              "\tSkipping the glDrawRangeElements() call",
 736                              start, end, count, type, indices, max,
 737                              ctx->Array.ArrayObj->_MaxElement - 1,
 738                              ctx->Array.ElementArrayBufferObj->Name,
 739                              ctx->Array.ElementArrayBufferObj->Size);
 740             }
 741             return;
 742          }
 743          /* XXX we could also find the min index and compare to 'start'
 744           * to see if start is correct.  But it's more likely to get the
 745           * upper bound wrong.
 746           */
 747       }
 748 #endif
 749    }
 750    else if (0) {
 751       _mesa_printf("glDraw[Range]Elements{,BaseVertex}"
 752                    "(start %u, end %u, type 0x%x, count %d) ElemBuf %u, "
 753                    "base %d\n",
 754                    start, end, type, count,
 755                    ctx->Array.ElementArrayBufferObj->Name,
 756                    basevertex);
 757    }
 758
 759 #if 0
 760    check_draw_elements_data(ctx, count, type, indices);
 761 #else
 762    (void) check_draw_elements_data;
 763 #endif
 764
 765    vbo_validated_drawrangeelements(ctx, mode, GL_TRUE, start, end,
 766                                    count, type, indices, basevertex);
 767 }
 768
 769 static void GLAPIENTRY
 770 vbo_exec_DrawRangeElements(GLenum mode,
 771                                      GLuint start, GLuint end,
 772                                      GLsizei count, GLenum type,
 773                                      const GLvoid *indices)
 774 {
 775    GET_CURRENT_CONTEXT(ctx);
 776
 777    if (MESA_VERBOSE & VERBOSE_DRAW)
 778       _mesa_debug(ctx,
 779                   "glDrawRangeElements(%s, %u, %u, %d, %s, %p)\n",
 780                   _mesa_lookup_enum_by_nr(mode), start, end, count,
 781                   _mesa_lookup_enum_by_nr(type), indices);
 782
 783    vbo_exec_DrawRangeElementsBaseVertex(mode, start, end, count, type,
 784                                         indices, 0);
 785 }
 786
 787
 788 static void GLAPIENTRY
 789 vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type,
 790                       const GLvoid *indices)
 791 {
 792    GET_CURRENT_CONTEXT(ctx);
 793
 794    if (MESA_VERBOSE & VERBOSE_DRAW)
 795       _mesa_debug(ctx, "glDrawElements(%s, %u, %s, %p)\n",
 796                   _mesa_lookup_enum_by_nr(mode), count,
 797                   _mesa_lookup_enum_by_nr(type), indices);
 798
 799    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices, 0 ))
 800       return;
 801
 802    vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, ~0, ~0,
 803                                    count, type, indices, 0);
 804 }
 805
 806 static void GLAPIENTRY
 807 vbo_exec_DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type,
 808                                 const GLvoid *indices, GLint basevertex)
 809 {
 810    GET_CURRENT_CONTEXT(ctx);
 811
 812    if (MESA_VERBOSE & VERBOSE_DRAW)
 813       _mesa_debug(ctx, "glDrawElementsBaseVertex(%s, %d, %s, %p, %d)\n",
 814                   _mesa_lookup_enum_by_nr(mode), count,
 815                   _mesa_lookup_enum_by_nr(type), indices, basevertex);
 816
 817    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices,
 818                                      basevertex ))
 819       return;
 820
 821    vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, ~0, ~0,
 822                                    count, type, indices, basevertex);
 823 }
 824
 825 /* Inner support for both _mesa_DrawElements and _mesa_DrawRangeElements */
 826 static void
 827 vbo_validated_multidrawelements(GLcontext *ctx, GLenum mode,
 828                                 const GLsizei *count, GLenum type,
 829                                 const GLvoid **indices, GLsizei primcount,
 830                                 const GLint *basevertex)
 831 {
 832    struct vbo_context *vbo = vbo_context(ctx);
 833    struct vbo_exec_context *exec = &vbo->exec;
 834    struct _mesa_index_buffer ib;
 835    struct _mesa_prim *prim;
 836    unsigned int index_type_size = 0;
 837    uintptr_t min_index_ptr, max_index_ptr;
 838    GLboolean fallback = GL_FALSE;
 839    int i;
 840
 841    if (primcount == 0)
 842       return;
 843
 844    FLUSH_CURRENT( ctx, 0 );
 845
 846    if (ctx->NewState)
 847       _mesa_update_state( ctx );
 848
 849    if (!_mesa_valid_to_render(ctx, "glMultiDrawElements")) {
 850       return;
 851    }
 852
 853    if (ctx->NewState)
 854       _mesa_update_state( ctx );
 855
 856    prim = _mesa_calloc(primcount * sizeof(*prim));
 857    if (prim == NULL) {
 858       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMultiDrawElements");
 859       return;
 860    }
 861
 862    /* Decide if we can do this all as one set of primitives sharing the
 863     * same index buffer, or if we have to reset the index pointer per primitive.
 864     */
 865    bind_arrays( ctx );
 866
 867    switch (type) {
 868    case GL_UNSIGNED_INT:
 869       index_type_size = 4;
 870       break;
 871    case GL_UNSIGNED_SHORT:
 872       index_type_size = 2;
 873       break;
 874    case GL_UNSIGNED_BYTE:
 875       index_type_size = 1;
 876       break;
 877    default:
 878       assert(0);
 879    }
 880
 881    min_index_ptr = (uintptr_t)indices[0];
 882    max_index_ptr = 0;
 883    for (i = 0; i < primcount; i++) {
 884       min_index_ptr = MIN2(min_index_ptr, (uintptr_t)indices[i]);
 885       max_index_ptr = MAX2(max_index_ptr, (uintptr_t)indices[i] +
 886                            index_type_size * count[i]);
 887    }
 888
 889    /* Check if we can handle this thing as a bunch of index offsets from the
 890     * same index pointer.  If we can't, then we have to fall back to doing
 891     * a draw_prims per primitive.
 892     */
 893    if (index_type_size != 1) {
 894       for (i = 0; i < primcount; i++) {
 895          if ((((uintptr_t)indices[i] - min_index_ptr) % index_type_size) != 0) {
 896             fallback = GL_TRUE;
 897             break;
 898          }
 899       }
 900    }
 901
 902    /* If the index buffer isn't in a VBO, then treating the application's
 903     * subranges of the index buffer as one large index buffer may lead to
 904     * us reading unmapped memory.
 905     */
 906    if (!_mesa_is_bufferobj(ctx->Array.ElementArrayBufferObj))
 907       fallback = GL_TRUE;
 908
 909    if (!fallback) {
 910       ib.count = (max_index_ptr - min_index_ptr) / index_type_size;
 911       ib.type = type;
 912       ib.obj = ctx->Array.ElementArrayBufferObj;
 913       ib.ptr = (void *)min_index_ptr;
 914
 915       for (i = 0; i < primcount; i++) {
 916          prim[i].begin = (i == 0);
 917          prim[i].end = (i == primcount - 1);
 918          prim[i].weak = 0;
 919          prim[i].pad = 0;
 920          prim[i].mode = mode;
 921          prim[i].start = ((uintptr_t)indices[i] - min_index_ptr) / index_type_size;
 922          prim[i].count = count[i];
 923          prim[i].indexed = 1;
 924          if (basevertex != NULL)
 925             prim[i].basevertex = basevertex[i];
 926          else
 927             prim[i].basevertex = 0;
 928       }
 929
 930       vbo->draw_prims(ctx, exec->array.inputs, prim, primcount, &ib,
 931                       GL_FALSE, ~0, ~0);
 932    } else {
 933       for (i = 0; i < primcount; i++) {
 934          ib.count = count[i];
 935          ib.type = type;
 936          ib.obj = ctx->Array.ElementArrayBufferObj;
 937          ib.ptr = indices[i];
 938
 939
 940          prim[0].begin = 1;
 941          prim[0].end = 1;
 942          prim[0].weak = 0;
 943          prim[0].pad = 0;
 944          prim[0].mode = mode;
 945          prim[0].start = 0;
 946          prim[0].count = count[i];
 947          prim[0].indexed = 1;
 948          if (basevertex != NULL)
 949             prim[0].basevertex = basevertex[i];
 950          else
 951             prim[0].basevertex = 0;
 952       }
 953
 954       vbo->draw_prims(ctx, exec->array.inputs, prim, 1, &ib,
 955                       GL_FALSE, ~0, ~0);
 956    }
 957    _mesa_free(prim);
 958 }
 959
 960 static void GLAPIENTRY
 961 vbo_exec_MultiDrawElements(GLenum mode,
 962                            const GLsizei *count, GLenum type,
 963                            const GLvoid **indices,
 964                            GLsizei primcount)
 965 {
 966    GET_CURRENT_CONTEXT(ctx);
 967    GLint i;
 968
 969    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 970
 971    for (i = 0; i < primcount; i++) {
 972       if (!_mesa_validate_DrawElements(ctx, mode, count[i], type, indices[i],
 973                                        0))
 974          return;
 975    }
 976
 977    vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount,
 978                                    NULL);
 979 }
 980
 981 static void GLAPIENTRY
 982 vbo_exec_MultiDrawElementsBaseVertex(GLenum mode,
 983                                      const GLsizei *count, GLenum type,
 984                                      const GLvoid **indices,
 985                                      GLsizei primcount,
 986                                      const GLsizei *basevertex)
 987 {
 988    GET_CURRENT_CONTEXT(ctx);
 989    GLint i;
 990
 991    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
 992
 993    for (i = 0; i < primcount; i++) {
 994       if (!_mesa_validate_DrawElements(ctx, mode, count[i], type, indices[i],
 995                                        basevertex[i]))
 996          return;
 997    }
 998
 999    vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount,
1000                                    basevertex);
1001 }
1002
1003
1004 /***********************************************************************
1005  * Initialization
1006  */
1007
1008 void
1009 vbo_exec_array_init( struct vbo_exec_context *exec )
1010 {
1011 #if 1
1012    exec->vtxfmt.DrawArrays = vbo_exec_DrawArrays;
1013    exec->vtxfmt.DrawElements = vbo_exec_DrawElements;
1014    exec->vtxfmt.DrawRangeElements = vbo_exec_DrawRangeElements;
1015    exec->vtxfmt.MultiDrawElementsEXT = vbo_exec_MultiDrawElements;
1016    exec->vtxfmt.DrawElementsBaseVertex = vbo_exec_DrawElementsBaseVertex;
1017    exec->vtxfmt.DrawRangeElementsBaseVertex = vbo_exec_DrawRangeElementsBaseVertex;
1018    exec->vtxfmt.MultiDrawElementsBaseVertex = vbo_exec_MultiDrawElementsBaseVertex;
1019 #else
1020    exec->vtxfmt.DrawArrays = _mesa_noop_DrawArrays;
1021    exec->vtxfmt.DrawElements = _mesa_noop_DrawElements;
1022    exec->vtxfmt.DrawRangeElements = _mesa_noop_DrawRangeElements;
1023    exec->vtxfmt.MultiDrawElementsEXT = _mesa_noop_MultiDrawElements;
1024    exec->vtxfmt.DrawElementsBaseVertex = _mesa_noop_DrawElementsBaseVertex;
1025    exec->vtxfmt.DrawRangeElementsBaseVertex = _mesa_noop_DrawRangeElementsBaseVertex;
1026    exec->vtxfmt.MultiDrawElementsBaseVertex = _mesa_noop_MultiDrawElementsBaseVertex;
1027 #endif
1028 }
1029
1030
1031 void
1032 vbo_exec_array_destroy( struct vbo_exec_context *exec )
1033 {
1034    /* nothing to do */
1035 }
1036
1037
1038 /* This API entrypoint is not ordinarily used */
1039 void GLAPIENTRY
1040 _mesa_DrawArrays(GLenum mode, GLint first, GLsizei count)
1041 {
1042    vbo_exec_DrawArrays(mode, first, count);
1043 }
1044
1045
1046 /* This API entrypoint is not ordinarily used */
1047 void GLAPIENTRY
1048 _mesa_DrawElements(GLenum mode, GLsizei count, GLenum type,
1049                    const GLvoid *indices)
1050 {
1051    vbo_exec_DrawElements(mode, count, type, indices);
1052 }
1053
1054 void GLAPIENTRY
1055 _mesa_DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type,
1056                              const GLvoid *indices, GLint basevertex)
1057 {
1058    vbo_exec_DrawElementsBaseVertex(mode, count, type, indices, basevertex);
1059 }
1060
1061
1062 /* This API entrypoint is not ordinarily used */
1063 void GLAPIENTRY
1064 _mesa_DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count,
1065                         GLenum type, const GLvoid *indices)
1066 {
1067    vbo_exec_DrawRangeElements(mode, start, end, count, type, indices);
1068 }
1069
1070 void GLAPIENTRY
1071 _mesa_DrawRangeElementsBaseVertex(GLenum mode, GLuint start, GLuint end,
1072                                   GLsizei count, GLenum type,
1073                                   const GLvoid *indices, GLint basevertex)
1074 {
1075    vbo_exec_DrawRangeElementsBaseVertex(mode, start, end, count, type,
1076                                         indices, basevertex);
1077 }
1078
1079 /* GL_EXT_multi_draw_arrays */
1080 void GLAPIENTRY
1081 _mesa_MultiDrawElementsEXT(GLenum mode, const GLsizei *count, GLenum type,
1082                            const GLvoid **indices, GLsizei primcount)
1083 {
1084    vbo_exec_MultiDrawElements(mode, count, type, indices, primcount);
1085 }
1086
1087 void GLAPIENTRY
1088 _mesa_MultiDrawElementsBaseVertex(GLenum mode,
1089                                   const GLsizei *count, GLenum type,
1090                                   const GLvoid **indices, GLsizei primcount,
1091                                   const GLint *basevertex)
1092 {
1093    vbo_exec_MultiDrawElementsBaseVertex(mode, count, type, indices,
1094                                         primcount, basevertex);
1095 }