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 "main/mfeatures.h"
  47 #include "program/prog_uniform.h"
  48
  49 #include "vbo/vbo.h"
  50
  51 #include "st_context.h"
  52 #include "st_atom.h"
  53 #include "st_cb_bufferobjects.h"
  54 #include "st_draw.h"
  55 #include "st_program.h"
  56
  57 #include "pipe/p_context.h"
  58 #include "pipe/p_defines.h"
  59 #include "util/u_inlines.h"
  60 #include "util/u_format.h"
  61 #include "util/u_prim.h"
  62 #include "util/u_draw_quad.h"
  63 #include "draw/draw_context.h"
  64 #include "cso_cache/cso_context.h"
  65
  66
  67 static GLuint double_types[4] = {
  68    PIPE_FORMAT_R64_FLOAT,
  69    PIPE_FORMAT_R64G64_FLOAT,
  70    PIPE_FORMAT_R64G64B64_FLOAT,
  71    PIPE_FORMAT_R64G64B64A64_FLOAT
  72 };
  73
  74 static GLuint float_types[4] = {
  75    PIPE_FORMAT_R32_FLOAT,
  76    PIPE_FORMAT_R32G32_FLOAT,
  77    PIPE_FORMAT_R32G32B32_FLOAT,
  78    PIPE_FORMAT_R32G32B32A32_FLOAT
  79 };
  80
  81 static GLuint half_float_types[4] = {
  82    PIPE_FORMAT_R16_FLOAT,
  83    PIPE_FORMAT_R16G16_FLOAT,
  84    PIPE_FORMAT_R16G16B16_FLOAT,
  85    PIPE_FORMAT_R16G16B16A16_FLOAT
  86 };
  87
  88 static GLuint uint_types_norm[4] = {
  89    PIPE_FORMAT_R32_UNORM,
  90    PIPE_FORMAT_R32G32_UNORM,
  91    PIPE_FORMAT_R32G32B32_UNORM,
  92    PIPE_FORMAT_R32G32B32A32_UNORM
  93 };
  94
  95 static GLuint uint_types_scale[4] = {
  96    PIPE_FORMAT_R32_USCALED,
  97    PIPE_FORMAT_R32G32_USCALED,
  98    PIPE_FORMAT_R32G32B32_USCALED,
  99    PIPE_FORMAT_R32G32B32A32_USCALED
 100 };
 101
 102 static GLuint int_types_norm[4] = {
 103    PIPE_FORMAT_R32_SNORM,
 104    PIPE_FORMAT_R32G32_SNORM,
 105    PIPE_FORMAT_R32G32B32_SNORM,
 106    PIPE_FORMAT_R32G32B32A32_SNORM
 107 };
 108
 109 static GLuint int_types_scale[4] = {
 110    PIPE_FORMAT_R32_SSCALED,
 111    PIPE_FORMAT_R32G32_SSCALED,
 112    PIPE_FORMAT_R32G32B32_SSCALED,
 113    PIPE_FORMAT_R32G32B32A32_SSCALED
 114 };
 115
 116 static GLuint ushort_types_norm[4] = {
 117    PIPE_FORMAT_R16_UNORM,
 118    PIPE_FORMAT_R16G16_UNORM,
 119    PIPE_FORMAT_R16G16B16_UNORM,
 120    PIPE_FORMAT_R16G16B16A16_UNORM
 121 };
 122
 123 static GLuint ushort_types_scale[4] = {
 124    PIPE_FORMAT_R16_USCALED,
 125    PIPE_FORMAT_R16G16_USCALED,
 126    PIPE_FORMAT_R16G16B16_USCALED,
 127    PIPE_FORMAT_R16G16B16A16_USCALED
 128 };
 129
 130 static GLuint short_types_norm[4] = {
 131    PIPE_FORMAT_R16_SNORM,
 132    PIPE_FORMAT_R16G16_SNORM,
 133    PIPE_FORMAT_R16G16B16_SNORM,
 134    PIPE_FORMAT_R16G16B16A16_SNORM
 135 };
 136
 137 static GLuint short_types_scale[4] = {
 138    PIPE_FORMAT_R16_SSCALED,
 139    PIPE_FORMAT_R16G16_SSCALED,
 140    PIPE_FORMAT_R16G16B16_SSCALED,
 141    PIPE_FORMAT_R16G16B16A16_SSCALED
 142 };
 143
 144 static GLuint ubyte_types_norm[4] = {
 145    PIPE_FORMAT_R8_UNORM,
 146    PIPE_FORMAT_R8G8_UNORM,
 147    PIPE_FORMAT_R8G8B8_UNORM,
 148    PIPE_FORMAT_R8G8B8A8_UNORM
 149 };
 150
 151 static GLuint ubyte_types_scale[4] = {
 152    PIPE_FORMAT_R8_USCALED,
 153    PIPE_FORMAT_R8G8_USCALED,
 154    PIPE_FORMAT_R8G8B8_USCALED,
 155    PIPE_FORMAT_R8G8B8A8_USCALED
 156 };
 157
 158 static GLuint byte_types_norm[4] = {
 159    PIPE_FORMAT_R8_SNORM,
 160    PIPE_FORMAT_R8G8_SNORM,
 161    PIPE_FORMAT_R8G8B8_SNORM,
 162    PIPE_FORMAT_R8G8B8A8_SNORM
 163 };
 164
 165 static GLuint byte_types_scale[4] = {
 166    PIPE_FORMAT_R8_SSCALED,
 167    PIPE_FORMAT_R8G8_SSCALED,
 168    PIPE_FORMAT_R8G8B8_SSCALED,
 169    PIPE_FORMAT_R8G8B8A8_SSCALED
 170 };
 171
 172 static GLuint fixed_types[4] = {
 173    PIPE_FORMAT_R32_FIXED,
 174    PIPE_FORMAT_R32G32_FIXED,
 175    PIPE_FORMAT_R32G32B32_FIXED,
 176    PIPE_FORMAT_R32G32B32A32_FIXED
 177 };
 178
 179
 180
 181 /**
 182  * Return a PIPE_FORMAT_x for the given GL datatype and size.
 183  */
 184 GLuint
 185 st_pipe_vertex_format(GLenum type, GLuint size, GLenum format,
 186                       GLboolean normalized)
 187 {
 188    assert((type >= GL_BYTE && type <= GL_DOUBLE) ||
 189           type == GL_FIXED || type == GL_HALF_FLOAT);
 190    assert(size >= 1);
 191    assert(size <= 4);
 192    assert(format == GL_RGBA || format == GL_BGRA);
 193
 194    if (format == GL_BGRA) {
 195       /* this is an odd-ball case */
 196       assert(type == GL_UNSIGNED_BYTE);
 197       assert(normalized);
 198       return PIPE_FORMAT_B8G8R8A8_UNORM;
 199    }
 200
 201    if (normalized) {
 202       switch (type) {
 203       case GL_DOUBLE: return double_types[size-1];
 204       case GL_FLOAT: return float_types[size-1];
 205       case GL_HALF_FLOAT: return half_float_types[size-1];
 206       case GL_INT: return int_types_norm[size-1];
 207       case GL_SHORT: return short_types_norm[size-1];
 208       case GL_BYTE: return byte_types_norm[size-1];
 209       case GL_UNSIGNED_INT: return uint_types_norm[size-1];
 210       case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
 211       case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
 212       case GL_FIXED: return fixed_types[size-1];
 213       default: assert(0); return 0;
 214       }
 215    }
 216    else {
 217       switch (type) {
 218       case GL_DOUBLE: return double_types[size-1];
 219       case GL_FLOAT: return float_types[size-1];
 220       case GL_HALF_FLOAT: return half_float_types[size-1];
 221       case GL_INT: return int_types_scale[size-1];
 222       case GL_SHORT: return short_types_scale[size-1];
 223       case GL_BYTE: return byte_types_scale[size-1];
 224       case GL_UNSIGNED_INT: return uint_types_scale[size-1];
 225       case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
 226       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
 227       case GL_FIXED: return fixed_types[size-1];
 228       default: assert(0); return 0;
 229       }
 230    }
 231    return 0; /* silence compiler warning */
 232 }
 233
 234
 235
 236
 237
 238 /**
 239  * Examine the active arrays to determine if we have interleaved
 240  * vertex arrays all living in one VBO, or all living in user space.
 241  * \param userSpace  returns whether the arrays are in user space.
 242  */
 243 static GLboolean
 244 is_interleaved_arrays(const struct st_vertex_program *vp,
 245                       const struct st_vp_variant *vpv,
 246                       const struct gl_client_array **arrays)
 247 {
 248    GLuint attr;
 249    const struct gl_buffer_object *firstBufObj = NULL;
 250    GLint firstStride = -1;
 251    const GLubyte *client_addr = NULL;
 252    GLboolean user_memory;
 253
 254    for (attr = 0; attr < vpv->num_inputs; attr++) {
 255       const GLuint mesaAttr = vp->index_to_input[attr];
 256       const struct gl_client_array *array = arrays[mesaAttr];
 257       const struct gl_buffer_object *bufObj = array->BufferObj;
 258       const GLsizei stride = array->StrideB; /* in bytes */
 259
 260       if (firstStride < 0) {
 261          firstStride = stride;
 262          user_memory = !bufObj || !bufObj->Name;
 263       }
 264       else if (firstStride != stride) {
 265          return GL_FALSE;
 266       }
 267
 268       if (!bufObj || !bufObj->Name) {
 269          /* Try to detect if the client-space arrays are
 270           * "close" to each other.
 271           */
 272          if (!user_memory) {
 273             return GL_FALSE;
 274          }
 275          if (!client_addr) {
 276             client_addr = array->Ptr;
 277          }
 278          else if (abs(array->Ptr - client_addr) > firstStride) {
 279             /* arrays start too far apart */
 280             return GL_FALSE;
 281          }
 282       }
 283       else if (!firstBufObj) {
 284          if (user_memory) {
 285             return GL_FALSE;
 286          }
 287          firstBufObj = bufObj;
 288       }
 289       else if (bufObj != firstBufObj) {
 290          return GL_FALSE;
 291       }
 292    }
 293
 294    return GL_TRUE;
 295 }
 296
 297
 298 /**
 299  * Set up for drawing interleaved arrays that all live in one VBO
 300  * or all live in user space.
 301  * \param vbuffer  returns vertex buffer info
 302  * \param velements  returns vertex element info
 303  */
 304 static void
 305 setup_interleaved_attribs(struct gl_context *ctx,
 306                           const struct st_vertex_program *vp,
 307                           const struct st_vp_variant *vpv,
 308                           const struct gl_client_array **arrays,
 309                           struct pipe_vertex_buffer *vbuffer,
 310                           struct pipe_vertex_element velements[],
 311                           unsigned max_index,
 312                           unsigned num_instances)
 313 {
 314    struct st_context *st = st_context(ctx);
 315    struct pipe_context *pipe = st->pipe;
 316    GLuint attr;
 317    const GLubyte *low_addr = NULL;
 318
 319    /* Find the lowest address. */
 320    if(vpv->num_inputs) {
 321       low_addr = arrays[vp->index_to_input[0]]->Ptr;
 322
 323       for (attr = 1; attr < vpv->num_inputs; attr++) {
 324          const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
 325          low_addr = MIN2(low_addr, start);
 326       }
 327    }
 328
 329    for (attr = 0; attr < vpv->num_inputs; attr++) {
 330       const GLuint mesaAttr = vp->index_to_input[attr];
 331       const struct gl_client_array *array = arrays[mesaAttr];
 332       struct gl_buffer_object *bufobj = array->BufferObj;
 333       struct st_buffer_object *stobj = st_buffer_object(bufobj);
 334       GLsizei stride = array->StrideB;
 335
 336       if (attr == 0) {
 337          if (bufobj && bufobj->Name) {
 338             vbuffer->buffer = NULL;
 339             pipe_resource_reference(&vbuffer->buffer, stobj->buffer);
 340             vbuffer->buffer_offset = pointer_to_offset(low_addr);
 341          } else {
 342             uint divisor = array->InstanceDivisor;
 343             uint length = (divisor ? num_instances / divisor : max_index) + 1;
 344             vbuffer->buffer =
 345                pipe_user_buffer_create(pipe->screen, (void*)low_addr,
 346                                        stride * length,
 347                                        PIPE_BIND_VERTEX_BUFFER);
 348             vbuffer->buffer_offset = 0;
 349
 350             /* Track user vertex buffers. */
 351             pipe_resource_reference(&st->user_vb[0], vbuffer->buffer);
 352             st->user_vb_stride[0] = stride;
 353             st->num_user_vbs = 1;
 354          }
 355          vbuffer->stride = stride; /* in bytes */
 356       }
 357
 358       velements[attr].src_offset = (unsigned) (array->Ptr - low_addr);
 359       velements[attr].instance_divisor = array->InstanceDivisor;
 360       velements[attr].vertex_buffer_index = 0;
 361       velements[attr].src_format = st_pipe_vertex_format(array->Type,
 362                                                          array->Size,
 363                                                          array->Format,
 364                                                          array->Normalized);
 365       assert(velements[attr].src_format);
 366    }
 367 }
 368
 369
 370 /**
 371  * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
 372  * vertex attribute.
 373  * \param vbuffer  returns vertex buffer info
 374  * \param velements  returns vertex element info
 375  */
 376 static void
 377 setup_non_interleaved_attribs(struct gl_context *ctx,
 378                               const struct st_vertex_program *vp,
 379                               const struct st_vp_variant *vpv,
 380                               const struct gl_client_array **arrays,
 381                               struct pipe_vertex_buffer vbuffer[],
 382                               struct pipe_vertex_element velements[],
 383                               unsigned max_index,
 384                               unsigned num_instances)
 385 {
 386    struct st_context *st = st_context(ctx);
 387    struct pipe_context *pipe = st->pipe;
 388    GLuint attr;
 389
 390    for (attr = 0; attr < vpv->num_inputs; attr++) {
 391       const GLuint mesaAttr = vp->index_to_input[attr];
 392       const struct gl_client_array *array = arrays[mesaAttr];
 393       struct gl_buffer_object *bufobj = array->BufferObj;
 394       GLsizei stride = array->StrideB;
 395
 396       if (bufobj && bufobj->Name) {
 397          /* Attribute data is in a VBO.
 398           * Recall that for VBOs, the gl_client_array->Ptr field is
 399           * really an offset from the start of the VBO, not a pointer.
 400           */
 401          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 402          assert(stobj->buffer);
 403
 404          vbuffer[attr].buffer = NULL;
 405          pipe_resource_reference(&vbuffer[attr].buffer, stobj->buffer);
 406          vbuffer[attr].buffer_offset = pointer_to_offset(array->Ptr);
 407       }
 408       else {
 409          /* wrap user data */
 410          uint bytes;
 411          void *ptr;
 412
 413          if (array->Ptr) {
 414             if (stride == 0) {
 415                bytes = _mesa_sizeof_type(array->Type) * array->Size;
 416             }
 417             else {
 418                uint divisor = array->InstanceDivisor;
 419                uint length = (divisor ? num_instances / divisor : max_index) + 1;
 420                bytes = stride * length;
 421             }
 422
 423             ptr = (void *) array->Ptr;
 424          }
 425          else {
 426             /* no array, use ctx->Current.Attrib[] value */
 427             bytes = sizeof(ctx->Current.Attrib[0]);
 428             ptr = (void *) ctx->Current.Attrib[mesaAttr];
 429             stride = 0;
 430          }
 431
 432          assert(ptr);
 433          assert(bytes);
 434
 435          vbuffer[attr].buffer =
 436             pipe_user_buffer_create(pipe->screen, ptr, bytes,
 437                                     PIPE_BIND_VERTEX_BUFFER);
 438
 439          vbuffer[attr].buffer_offset = 0;
 440
 441          /* Track user vertex buffers. */
 442          pipe_resource_reference(&st->user_vb[attr], vbuffer[attr].buffer);
 443          st->user_vb_stride[attr] = stride;
 444          st->num_user_vbs = MAX2(st->num_user_vbs, attr+1);
 445       }
 446
 447       /* common-case setup */
 448       vbuffer[attr].stride = stride; /* in bytes */
 449
 450       velements[attr].src_offset = 0;
 451       velements[attr].instance_divisor = array->InstanceDivisor;
 452       velements[attr].vertex_buffer_index = attr;
 453       velements[attr].src_format = st_pipe_vertex_format(array->Type,
 454                                                          array->Size,
 455                                                          array->Format,
 456                                                          array->Normalized);
 457       assert(velements[attr].src_format);
 458    }
 459 }
 460
 461
 462 static void
 463 setup_index_buffer(struct gl_context *ctx,
 464                    const struct _mesa_index_buffer *ib,
 465                    struct pipe_index_buffer *ibuffer)
 466 {
 467    struct st_context *st = st_context(ctx);
 468    struct pipe_context *pipe = st->pipe;
 469
 470    memset(ibuffer, 0, sizeof(*ibuffer));
 471    if (ib) {
 472       struct gl_buffer_object *bufobj = ib->obj;
 473
 474       switch (ib->type) {
 475       case GL_UNSIGNED_INT:
 476          ibuffer->index_size = 4;
 477          break;
 478       case GL_UNSIGNED_SHORT:
 479          ibuffer->index_size = 2;
 480          break;
 481       case GL_UNSIGNED_BYTE:
 482          ibuffer->index_size = 1;
 483          break;
 484       default:
 485          assert(0);
 486          return;
 487       }
 488
 489       /* get/create the index buffer object */
 490       if (bufobj && bufobj->Name) {
 491          /* elements/indexes are in a real VBO */
 492          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 493          pipe_resource_reference(&ibuffer->buffer, stobj->buffer);
 494          ibuffer->offset = pointer_to_offset(ib->ptr);
 495       }
 496       else {
 497          /* element/indicies are in user space memory */
 498          ibuffer->buffer =
 499             pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,
 500                                     ib->count * ibuffer->index_size,
 501                                     PIPE_BIND_INDEX_BUFFER);
 502       }
 503    }
 504 }
 505
 506 /**
 507  * Prior to drawing, check that any uniforms referenced by the
 508  * current shader have been set.  If a uniform has not been set,
 509  * issue a warning.
 510  */
 511 static void
 512 check_uniforms(struct gl_context *ctx)
 513 {
 514    struct gl_shader_program *shProg[3] = {
 515       ctx->Shader.CurrentVertexProgram,
 516       ctx->Shader.CurrentGeometryProgram,
 517       ctx->Shader.CurrentFragmentProgram,
 518    };
 519    unsigned j;
 520
 521    for (j = 0; j < 3; j++) {
 522       unsigned i;
 523
 524       if (shProg[j] == NULL || !shProg[j]->LinkStatus)
 525          continue;
 526
 527       for (i = 0; i < shProg[j]->Uniforms->NumUniforms; i++) {
 528          const struct gl_uniform *u = &shProg[j]->Uniforms->Uniforms[i];
 529          if (!u->Initialized) {
 530             _mesa_warning(ctx,
 531                           "Using shader with uninitialized uniform: %s",
 532                           u->Name);
 533          }
 534       }
 535    }
 536 }
 537
 538
 539 /**
 540  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
 541  * the corresponding Gallium type.
 542  */
 543 static unsigned
 544 translate_prim(const struct gl_context *ctx, unsigned prim)
 545 {
 546    /* GL prims should match Gallium prims, spot-check a few */
 547    assert(GL_POINTS == PIPE_PRIM_POINTS);
 548    assert(GL_QUADS == PIPE_PRIM_QUADS);
 549    assert(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 550
 551    /* Avoid quadstrips if it's easy to do so:
 552     * Note: it's imporant to do the correct trimming if we change the prim type!
 553     * We do that wherever this function is called.
 554     */
 555    if (prim == GL_QUAD_STRIP &&
 556        ctx->Light.ShadeModel != GL_FLAT &&
 557        ctx->Polygon.FrontMode == GL_FILL &&
 558        ctx->Polygon.BackMode == GL_FILL)
 559       prim = GL_TRIANGLE_STRIP;
 560
 561    return prim;
 562 }
 563
 564
 565 static void
 566 st_validate_varrays(struct gl_context *ctx,
 567                     const struct gl_client_array **arrays,
 568                     unsigned max_index,
 569                     unsigned num_instances)
 570 {
 571    struct st_context *st = st_context(ctx);
 572    const struct st_vertex_program *vp;
 573    const struct st_vp_variant *vpv;
 574    struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
 575    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 576    unsigned num_vbuffers, num_velements;
 577    GLuint attr;
 578    unsigned i;
 579
 580    /* must get these after state validation! */
 581    vp = st->vp;
 582    vpv = st->vp_variant;
 583
 584    memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs);
 585
 586    /* Unreference any user vertex buffers. */
 587    for (i = 0; i < st->num_user_vbs; i++) {
 588       pipe_resource_reference(&st->user_vb[i], NULL);
 589    }
 590    st->num_user_vbs = 0;
 591
 592    /*
 593     * Setup the vbuffer[] and velements[] arrays.
 594     */
 595    if (is_interleaved_arrays(vp, vpv, arrays)) {
 596       setup_interleaved_attribs(ctx, vp, vpv, arrays, vbuffer, velements,
 597                                 max_index, num_instances);
 598
 599       num_vbuffers = 1;
 600       num_velements = vpv->num_inputs;
 601       if (num_velements == 0)
 602          num_vbuffers = 0;
 603    }
 604    else {
 605       setup_non_interleaved_attribs(ctx, vp, vpv, arrays,
 606                                     vbuffer, velements, max_index, num_instances);
 607       num_vbuffers = vpv->num_inputs;
 608       num_velements = vpv->num_inputs;
 609    }
 610
 611    cso_set_vertex_buffers(st->cso_context, num_vbuffers, vbuffer);
 612    cso_set_vertex_elements(st->cso_context, num_velements, velements);
 613
 614    /* unreference buffers (frees wrapped user-space buffer objects)
 615     * This is OK, because the pipe driver should reference buffers by itself
 616     * in set_vertex_buffers. */
 617    for (attr = 0; attr < num_vbuffers; attr++) {
 618       pipe_resource_reference(&vbuffer[attr].buffer, NULL);
 619       assert(!vbuffer[attr].buffer);
 620    }
 621 }
 622
 623
 624 /**
 625  * This function gets plugged into the VBO module and is called when
 626  * we have something to render.
 627  * Basically, translate the information into the format expected by gallium.
 628  */
 629 void
 630 st_draw_vbo(struct gl_context *ctx,
 631             const struct gl_client_array **arrays,
 632             const struct _mesa_prim *prims,
 633             GLuint nr_prims,
 634             const struct _mesa_index_buffer *ib,
 635             GLboolean index_bounds_valid,
 636             GLuint min_index,
 637             GLuint max_index)
 638 {
 639    struct st_context *st = st_context(ctx);
 640    struct pipe_context *pipe = st->pipe;
 641    struct pipe_index_buffer ibuffer;
 642    struct pipe_draw_info info;
 643    unsigned i, num_instances = 1;
 644    GLboolean new_array =
 645          st->dirty.st && (st->dirty.mesa & (_NEW_ARRAY | _NEW_PROGRAM)) != 0;
 646
 647    /* Mesa core state should have been validated already */
 648    assert(ctx->NewState == 0x0);
 649
 650    if (ib) {
 651       /* Gallium probably doesn't want this in some cases. */
 652       if (!index_bounds_valid)
 653          if (!vbo_all_varyings_in_vbos(arrays))
 654             vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
 655
 656       for (i = 0; i < nr_prims; i++) {
 657          num_instances = MAX2(num_instances, prims[i].num_instances);
 658       }
 659    } else {
 660       /* Get min/max index for non-indexed drawing. */
 661       min_index = ~0;
 662       max_index = 0;
 663
 664       for (i = 0; i < nr_prims; i++) {
 665          min_index = MIN2(min_index, prims[i].start);
 666          max_index = MAX2(max_index, prims[i].start + prims[i].count - 1);
 667          num_instances = MAX2(num_instances, prims[i].num_instances);
 668       }
 669    }
 670
 671    /* Validate state. */
 672    if (st->dirty.st) {
 673       GLboolean vertDataEdgeFlags;
 674
 675       /* sanity check for pointer arithmetic below */
 676       assert(sizeof(arrays[0]->Ptr[0]) == 1);
 677
 678       vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj &&
 679                           arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name;
 680       if (vertDataEdgeFlags != st->vertdata_edgeflags) {
 681          st->vertdata_edgeflags = vertDataEdgeFlags;
 682          st->dirty.st |= ST_NEW_EDGEFLAGS_DATA;
 683       }
 684
 685       st_validate_state(st);
 686
 687       if (new_array) {
 688          st_validate_varrays(ctx, arrays, max_index, num_instances);
 689       }
 690
 691 #if 0
 692       if (MESA_VERBOSE & VERBOSE_GLSL) {
 693          check_uniforms(ctx);
 694       }
 695 #else
 696       (void) check_uniforms;
 697 #endif
 698    }
 699
 700    /* Notify the driver that the content of user buffers may have been
 701     * changed. */
 702    if (!new_array && st->num_user_vbs) {
 703       for (i = 0; i < st->num_user_vbs; i++) {
 704          if (st->user_vb[i]) {
 705             unsigned stride = st->user_vb_stride[i];
 706
 707             if (stride) {
 708                pipe->redefine_user_buffer(pipe, st->user_vb[i],
 709                                           min_index * stride,
 710                                           (max_index + 1 - min_index) * stride);
 711             } else {
 712                /* stride == 0 */
 713                pipe->redefine_user_buffer(pipe, st->user_vb[i],
 714                                           0, st->user_vb[i]->width0);
 715             }
 716          }
 717       }
 718    }
 719
 720    setup_index_buffer(ctx, ib, &ibuffer);
 721    pipe->set_index_buffer(pipe, &ibuffer);
 722
 723    util_draw_init_info(&info);
 724    if (ib) {
 725       info.indexed = TRUE;
 726       if (min_index != ~0 && max_index != ~0) {
 727          info.min_index = min_index;
 728          info.max_index = max_index;
 729       }
 730    }
 731
 732    info.primitive_restart = st->ctx->Array.PrimitiveRestart;
 733    info.restart_index = st->ctx->Array.RestartIndex;
 734
 735    /* do actual drawing */
 736    for (i = 0; i < nr_prims; i++) {
 737       info.mode = translate_prim( ctx, prims[i].mode );
 738       info.start = prims[i].start;
 739       info.count = prims[i].count;
 740       info.instance_count = prims[i].num_instances;
 741       info.index_bias = prims[i].basevertex;
 742       if (!ib) {
 743          info.min_index = info.start;
 744          info.max_index = info.start + info.count - 1;
 745       }
 746
 747       if (u_trim_pipe_prim(info.mode, &info.count))
 748          pipe->draw_vbo(pipe, &info);
 749    }
 750
 751    pipe_resource_reference(&ibuffer.buffer, NULL);
 752 }
 753
 754
 755 void st_init_draw( struct st_context *st )
 756 {
 757    struct gl_context *ctx = st->ctx;
 758
 759    vbo_set_draw_func(ctx, st_draw_vbo);
 760
 761 #if FEATURE_feedback || FEATURE_rastpos
 762    st->draw = draw_create(st->pipe); /* for selection/feedback */
 763
 764    /* Disable draw options that might convert points/lines to tris, etc.
 765     * as that would foul-up feedback/selection mode.
 766     */
 767    draw_wide_line_threshold(st->draw, 1000.0f);
 768    draw_wide_point_threshold(st->draw, 1000.0f);
 769    draw_enable_line_stipple(st->draw, FALSE);
 770    draw_enable_point_sprites(st->draw, FALSE);
 771 #endif
 772 }
 773
 774
 775 void st_destroy_draw( struct st_context *st )
 776 {
 777 #if FEATURE_feedback || FEATURE_rastpos
 778    draw_destroy(st->draw);
 779 #endif
 780 }
 781
 782