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 pipe_context *pipe = ctx->st->pipe;
 351    GLuint attr;
 352    const GLubyte *offset0 = NULL;
 353
 354    for (attr = 0; attr < vpv->num_inputs; attr++) {
 355       const GLuint mesaAttr = vp->index_to_input[attr];
 356       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 357       struct st_buffer_object *stobj = st_buffer_object(bufobj);
 358       GLsizei stride = arrays[mesaAttr]->StrideB;
 359
 360       /*printf("stobj %u = %p\n", attr, (void*)stobj);*/
 361
 362       if (attr == 0) {
 363          const GLubyte *low, *high;
 364
 365          get_arrays_bounds(vp, vpv, arrays, max_index, &low, &high);
 366          /* debug_printf("buffer range: %p %p range %d max index %u\n",
 367             low, high, high - low, max_index); */
 368
 369          offset0 = low;
 370          if (userSpace) {
 371             vbuffer->buffer =
 372                pipe_user_buffer_create(pipe->screen, (void *) low, high - low,
 373                                        PIPE_BIND_VERTEX_BUFFER);
 374             vbuffer->buffer_offset = 0;
 375          }
 376          else {
 377             vbuffer->buffer = NULL;
 378             pipe_resource_reference(&vbuffer->buffer, stobj->buffer);
 379             vbuffer->buffer_offset = pointer_to_offset(low);
 380          }
 381          vbuffer->stride = stride; /* in bytes */
 382          vbuffer->max_index = max_index;
 383       }
 384
 385       velements[attr].src_offset =
 386          (unsigned) (arrays[mesaAttr]->Ptr - offset0);
 387       velements[attr].instance_divisor = 0;
 388       velements[attr].vertex_buffer_index = 0;
 389       velements[attr].src_format =
 390          st_pipe_vertex_format(arrays[mesaAttr]->Type,
 391                                arrays[mesaAttr]->Size,
 392                                arrays[mesaAttr]->Format,
 393                                arrays[mesaAttr]->Normalized);
 394       assert(velements[attr].src_format);
 395    }
 396 }
 397
 398
 399 /**
 400  * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
 401  * vertex attribute.
 402  * \param vbuffer  returns vertex buffer info
 403  * \param velements  returns vertex element info
 404  */
 405 static void
 406 setup_non_interleaved_attribs(GLcontext *ctx,
 407                               const struct st_vertex_program *vp,
 408                               const struct st_vp_varient *vpv,
 409                               const struct gl_client_array **arrays,
 410                               GLuint max_index,
 411                               GLboolean *userSpace,
 412                               struct pipe_vertex_buffer vbuffer[],
 413                               struct pipe_vertex_element velements[])
 414 {
 415    struct pipe_context *pipe = ctx->st->pipe;
 416    GLuint attr;
 417
 418    for (attr = 0; attr < vpv->num_inputs; attr++) {
 419       const GLuint mesaAttr = vp->index_to_input[attr];
 420       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 421       GLsizei stride = arrays[mesaAttr]->StrideB;
 422
 423       *userSpace = GL_FALSE;
 424
 425       if (bufobj && bufobj->Name) {
 426          /* Attribute data is in a VBO.
 427           * Recall that for VBOs, the gl_client_array->Ptr field is
 428           * really an offset from the start of the VBO, not a pointer.
 429           */
 430          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 431          assert(stobj->buffer);
 432          /*printf("stobj %u = %p\n", attr, (void*) stobj);*/
 433
 434          vbuffer[attr].buffer = NULL;
 435          pipe_resource_reference(&vbuffer[attr].buffer, stobj->buffer);
 436          vbuffer[attr].buffer_offset = pointer_to_offset(arrays[mesaAttr]->Ptr);
 437          velements[attr].src_offset = 0;
 438       }
 439       else {
 440          /* attribute data is in user-space memory, not a VBO */
 441          uint bytes;
 442          /*printf("user-space array %d stride %d\n", attr, stride);*/
 443
 444          *userSpace = GL_TRUE;
 445
 446          /* wrap user data */
 447          if (arrays[mesaAttr]->Ptr) {
 448             /* user's vertex array */
 449             if (arrays[mesaAttr]->StrideB) {
 450                bytes = arrays[mesaAttr]->StrideB * (max_index + 1);
 451             }
 452             else {
 453                bytes = arrays[mesaAttr]->Size
 454                   * _mesa_sizeof_type(arrays[mesaAttr]->Type);
 455             }
 456             vbuffer[attr].buffer =
 457                pipe_user_buffer_create(pipe->screen,
 458                                        (void *) arrays[mesaAttr]->Ptr, bytes,
 459                                        PIPE_BIND_VERTEX_BUFFER);
 460          }
 461          else {
 462             /* no array, use ctx->Current.Attrib[] value */
 463             bytes = sizeof(ctx->Current.Attrib[0]);
 464             vbuffer[attr].buffer =
 465                pipe_user_buffer_create(pipe->screen,
 466                                        (void *) ctx->Current.Attrib[mesaAttr],
 467                                        bytes,
 468                                        PIPE_BIND_VERTEX_BUFFER);
 469             stride = 0;
 470          }
 471
 472          vbuffer[attr].buffer_offset = 0;
 473          velements[attr].src_offset = 0;
 474       }
 475
 476       assert(velements[attr].src_offset <= 2048); /* 11-bit field */
 477
 478       /* common-case setup */
 479       vbuffer[attr].stride = stride; /* in bytes */
 480       vbuffer[attr].max_index = max_index;
 481       velements[attr].instance_divisor = 0;
 482       velements[attr].vertex_buffer_index = attr;
 483       velements[attr].src_format
 484          = st_pipe_vertex_format(arrays[mesaAttr]->Type,
 485                                  arrays[mesaAttr]->Size,
 486                                  arrays[mesaAttr]->Format,
 487                                  arrays[mesaAttr]->Normalized);
 488       assert(velements[attr].src_format);
 489    }
 490 }
 491
 492
 493
 494 /**
 495  * Prior to drawing, check that any uniforms referenced by the
 496  * current shader have been set.  If a uniform has not been set,
 497  * issue a warning.
 498  */
 499 static void
 500 check_uniforms(GLcontext *ctx)
 501 {
 502    const struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;
 503    if (shProg && shProg->LinkStatus) {
 504       GLuint i;
 505       for (i = 0; i < shProg->Uniforms->NumUniforms; i++) {
 506          const struct gl_uniform *u = &shProg->Uniforms->Uniforms[i];
 507          if (!u->Initialized) {
 508             _mesa_warning(ctx,
 509                           "Using shader with uninitialized uniform: %s",
 510                           u->Name);
 511          }
 512       }
 513    }
 514 }
 515
 516
 517 static unsigned translate_prim( GLcontext *ctx,
 518                                 unsigned prim )
 519 {
 520    /* Avoid quadstrips if it's easy to do so:
 521     */
 522    if (prim == GL_QUAD_STRIP &&
 523        ctx->Light.ShadeModel != GL_FLAT &&
 524        ctx->Polygon.FrontMode == GL_FILL &&
 525        ctx->Polygon.BackMode == GL_FILL)
 526       prim = GL_TRIANGLE_STRIP;
 527
 528    return prim;
 529 }
 530
 531 /**
 532  * This function gets plugged into the VBO module and is called when
 533  * we have something to render.
 534  * Basically, translate the information into the format expected by gallium.
 535  */
 536 void
 537 st_draw_vbo(GLcontext *ctx,
 538             const struct gl_client_array **arrays,
 539             const struct _mesa_prim *prims,
 540             GLuint nr_prims,
 541             const struct _mesa_index_buffer *ib,
 542             GLboolean index_bounds_valid,
 543             GLuint min_index,
 544             GLuint max_index)
 545 {
 546    struct pipe_context *pipe = ctx->st->pipe;
 547    const struct st_vertex_program *vp;
 548    const struct st_vp_varient *vpv;
 549    struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
 550    GLuint attr;
 551    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 552    unsigned num_vbuffers, num_velements;
 553    GLboolean userSpace = GL_FALSE;
 554    GLboolean vertDataEdgeFlags;
 555
 556    /* Mesa core state should have been validated already */
 557    assert(ctx->NewState == 0x0);
 558
 559    /* Gallium probably doesn't want this in some cases. */
 560    if (!index_bounds_valid)
 561       if (!vbo_all_varyings_in_vbos(arrays))
 562          vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
 563
 564    /* sanity check for pointer arithmetic below */
 565    assert(sizeof(arrays[0]->Ptr[0]) == 1);
 566
 567    vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj &&
 568                        arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name;
 569    if (vertDataEdgeFlags != ctx->st->vertdata_edgeflags) {
 570       ctx->st->vertdata_edgeflags = vertDataEdgeFlags;
 571       ctx->st->dirty.st |= ST_NEW_EDGEFLAGS_DATA;
 572    }
 573
 574    st_validate_state(ctx->st);
 575
 576    /* must get these after state validation! */
 577    vp = ctx->st->vp;
 578    vpv = ctx->st->vp_varient;
 579
 580 #if 0
 581    if (MESA_VERBOSE & VERBOSE_GLSL) {
 582       check_uniforms(ctx);
 583    }
 584 #else
 585    (void) check_uniforms;
 586 #endif
 587
 588    memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs);
 589    /*
 590     * Setup the vbuffer[] and velements[] arrays.
 591     */
 592    if (is_interleaved_arrays(vp, vpv, arrays, &userSpace)) {
 593       /*printf("Draw interleaved\n");*/
 594       setup_interleaved_attribs(ctx, vp, vpv, arrays, max_index, userSpace,
 595                                 vbuffer, velements);
 596       num_vbuffers = 1;
 597       num_velements = vpv->num_inputs;
 598       if (num_velements == 0)
 599          num_vbuffers = 0;
 600    }
 601    else {
 602       /*printf("Draw non-interleaved\n");*/
 603       setup_non_interleaved_attribs(ctx, vp, vpv, arrays, max_index,
 604                                     &userSpace, vbuffer, velements);
 605       num_vbuffers = vpv->num_inputs;
 606       num_velements = vpv->num_inputs;
 607    }
 608
 609 #if 0
 610    {
 611       GLuint i;
 612       for (i = 0; i < num_vbuffers; i++) {
 613          printf("buffers[%d].stride = %u\n", i, vbuffer[i].stride);
 614          printf("buffers[%d].max_index = %u\n", i, vbuffer[i].max_index);
 615          printf("buffers[%d].buffer_offset = %u\n", i, vbuffer[i].buffer_offset);
 616          printf("buffers[%d].buffer = %p\n", i, (void*) vbuffer[i].buffer);
 617       }
 618       for (i = 0; i < num_velements; i++) {
 619          printf("vlements[%d].vbuffer_index = %u\n", i, velements[i].vertex_buffer_index);
 620          printf("vlements[%d].src_offset = %u\n", i, velements[i].src_offset);
 621          printf("vlements[%d].format = %s\n", i, util_format_name(velements[i].src_format));
 622       }
 623    }
 624 #endif
 625
 626    pipe->set_vertex_buffers(pipe, num_vbuffers, vbuffer);
 627    cso_set_vertex_elements(ctx->st->cso_context, num_velements, velements);
 628
 629    if (num_vbuffers == 0 || num_velements == 0)
 630       return;
 631
 632    /* do actual drawing */
 633    if (ib) {
 634       /* indexed primitive */
 635       struct gl_buffer_object *bufobj = ib->obj;
 636       struct pipe_resource *indexBuf = NULL;
 637       unsigned indexSize, indexOffset, i;
 638       unsigned prim;
 639
 640       switch (ib->type) {
 641       case GL_UNSIGNED_INT:
 642          indexSize = 4;
 643          break;
 644       case GL_UNSIGNED_SHORT:
 645          indexSize = 2;
 646          break;
 647       case GL_UNSIGNED_BYTE:
 648          indexSize = 1;
 649          break;
 650       default:
 651          assert(0);
 652          return;
 653       }
 654
 655       /* get/create the index buffer object */
 656       if (bufobj && bufobj->Name) {
 657          /* elements/indexes are in a real VBO */
 658          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 659          pipe_resource_reference(&indexBuf, stobj->buffer);
 660          indexOffset = pointer_to_offset(ib->ptr) / indexSize;
 661       }
 662       else {
 663          /* element/indicies are in user space memory */
 664          indexBuf = pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,
 665                                             ib->count * indexSize,
 666                                             PIPE_BIND_INDEX_BUFFER);
 667          indexOffset = 0;
 668       }
 669
 670       /* draw */
 671       if (pipe->draw_range_elements && min_index != ~0 && max_index != ~0) {
 672          /* XXX: exercise temporary path to pass min/max directly
 673           * through to driver & draw module.  These interfaces still
 674           * need a bit of work...
 675           */
 676          for (i = 0; i < nr_prims; i++) {
 677             prim = translate_prim( ctx, prims[i].mode );
 678
 679             pipe->draw_range_elements(pipe, indexBuf, indexSize, 0,
 680                                       min_index, max_index, prim,
 681                                       prims[i].start + indexOffset, prims[i].count);
 682          }
 683       }
 684       else {
 685          for (i = 0; i < nr_prims; i++) {
 686             prim = translate_prim( ctx, prims[i].mode );
 687
 688             if (prims[i].num_instances == 1) {
 689                pipe->draw_elements(pipe, indexBuf, indexSize, 0, prim,
 690                                    prims[i].start + indexOffset,
 691                                    prims[i].count);
 692             }
 693             else {
 694                pipe->draw_elements_instanced(pipe, indexBuf, indexSize, 0, prim,
 695                                              prims[i].start + indexOffset,
 696                                              prims[i].count,
 697                                              0, prims[i].num_instances);
 698             }
 699          }
 700       }
 701
 702       pipe_resource_reference(&indexBuf, NULL);
 703    }
 704    else {
 705       /* non-indexed */
 706       GLuint i;
 707       GLuint prim;
 708
 709       for (i = 0; i < nr_prims; i++) {
 710          prim = translate_prim( ctx, prims[i].mode );
 711
 712          if (prims[i].num_instances == 1) {
 713             pipe->draw_arrays(pipe, prim, prims[i].start, prims[i].count);
 714          }
 715          else {
 716             pipe->draw_arrays_instanced(pipe, prim, prims[i].start,
 717                                         prims[i].count,
 718                                         0, prims[i].num_instances);
 719          }
 720       }
 721    }
 722
 723    /* unreference buffers (frees wrapped user-space buffer objects) */
 724    for (attr = 0; attr < num_vbuffers; attr++) {
 725       pipe_resource_reference(&vbuffer[attr].buffer, NULL);
 726       assert(!vbuffer[attr].buffer);
 727    }
 728
 729    if (userSpace)
 730    {
 731       pipe->set_vertex_buffers(pipe, 0, NULL);
 732    }
 733 }
 734
 735
 736 void st_init_draw( struct st_context *st )
 737 {
 738    GLcontext *ctx = st->ctx;
 739
 740    vbo_set_draw_func(ctx, st_draw_vbo);
 741 }
 742
 743
 744 void st_destroy_draw( struct st_context *st )
 745 {
 746 }
 747
 748