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_buffer_object *bufObj = arrays[mesaAttr]->BufferObj;
 257       const GLsizei stride = arrays[mesaAttr]->StrideB; /* in bytes */
 258
 259       if (firstStride < 0) {
 260          firstStride = stride;
 261          user_memory = !bufObj || !bufObj->Name;
 262       }
 263       else if (firstStride != stride) {
 264          return GL_FALSE;
 265       }
 266
 267       if (!bufObj || !bufObj->Name) {
 268          /* Try to detect if the client-space arrays are
 269           * "close" to each other.
 270           */
 271          if (!user_memory) {
 272             return GL_FALSE;
 273          }
 274          if (!client_addr) {
 275             client_addr = arrays[mesaAttr]->Ptr;
 276          }
 277          else if (abs(arrays[mesaAttr]->Ptr - client_addr) > firstStride) {
 278             /* arrays start too far apart */
 279             return GL_FALSE;
 280          }
 281       }
 282       else if (!firstBufObj) {
 283          if (user_memory) {
 284             return GL_FALSE;
 285          }
 286          firstBufObj = bufObj;
 287       }
 288       else if (bufObj != firstBufObj) {
 289          return GL_FALSE;
 290       }
 291    }
 292
 293    return GL_TRUE;
 294 }
 295
 296
 297 /**
 298  * Set up for drawing interleaved arrays that all live in one VBO
 299  * or all live in user space.
 300  * \param vbuffer  returns vertex buffer info
 301  * \param velements  returns vertex element info
 302  */
 303 static void
 304 setup_interleaved_attribs(struct gl_context *ctx,
 305                           const struct st_vertex_program *vp,
 306                           const struct st_vp_variant *vpv,
 307                           const struct gl_client_array **arrays,
 308                           struct pipe_vertex_buffer *vbuffer,
 309                           struct pipe_vertex_element velements[],
 310                           unsigned max_index)
 311 {
 312    struct st_context *st = st_context(ctx);
 313    struct pipe_context *pipe = st->pipe;
 314    GLuint attr;
 315    const GLubyte *low_addr = NULL;
 316
 317    /* Find the lowest address. */
 318    if(vpv->num_inputs) {
 319       low_addr = arrays[vp->index_to_input[0]]->Ptr;
 320
 321       for (attr = 1; attr < vpv->num_inputs; attr++) {
 322          const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
 323          low_addr = MIN2(low_addr, start);
 324       }
 325    }
 326
 327    for (attr = 0; attr < vpv->num_inputs; attr++) {
 328       const GLuint mesaAttr = vp->index_to_input[attr];
 329       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 330       struct st_buffer_object *stobj = st_buffer_object(bufobj);
 331       GLsizei stride = arrays[mesaAttr]->StrideB;
 332
 333       if (attr == 0) {
 334          if (bufobj && bufobj->Name) {
 335             vbuffer->buffer = NULL;
 336             pipe_resource_reference(&vbuffer->buffer, stobj->buffer);
 337             vbuffer->buffer_offset = pointer_to_offset(low_addr);
 338          } else {
 339             vbuffer->buffer =
 340                pipe_user_buffer_create(pipe->screen, (void*)low_addr,
 341                                        stride * (max_index + 1),
 342                                        PIPE_BIND_VERTEX_BUFFER);
 343             vbuffer->buffer_offset = 0;
 344
 345             /* Track user vertex buffers. */
 346             pipe_resource_reference(&st->user_vb[0], vbuffer->buffer);
 347             st->user_vb_stride[0] = stride;
 348             st->num_user_vbs = 1;
 349          }
 350          vbuffer->stride = stride; /* in bytes */
 351       }
 352
 353       velements[attr].src_offset =
 354          (unsigned) (arrays[mesaAttr]->Ptr - low_addr);
 355       velements[attr].instance_divisor = arrays[mesaAttr]->InstanceDivisor;
 356       velements[attr].vertex_buffer_index = 0;
 357       velements[attr].src_format =
 358          st_pipe_vertex_format(arrays[mesaAttr]->Type,
 359                                arrays[mesaAttr]->Size,
 360                                arrays[mesaAttr]->Format,
 361                                arrays[mesaAttr]->Normalized);
 362       assert(velements[attr].src_format);
 363    }
 364 }
 365
 366
 367 /**
 368  * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
 369  * vertex attribute.
 370  * \param vbuffer  returns vertex buffer info
 371  * \param velements  returns vertex element info
 372  */
 373 static void
 374 setup_non_interleaved_attribs(struct gl_context *ctx,
 375                               const struct st_vertex_program *vp,
 376                               const struct st_vp_variant *vpv,
 377                               const struct gl_client_array **arrays,
 378                               struct pipe_vertex_buffer vbuffer[],
 379                               struct pipe_vertex_element velements[],
 380                               unsigned max_index)
 381 {
 382    struct st_context *st = st_context(ctx);
 383    struct pipe_context *pipe = st->pipe;
 384    GLuint attr;
 385
 386    for (attr = 0; attr < vpv->num_inputs; attr++) {
 387       const GLuint mesaAttr = vp->index_to_input[attr];
 388       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 389       GLsizei stride = arrays[mesaAttr]->StrideB;
 390
 391       if (bufobj && bufobj->Name) {
 392          /* Attribute data is in a VBO.
 393           * Recall that for VBOs, the gl_client_array->Ptr field is
 394           * really an offset from the start of the VBO, not a pointer.
 395           */
 396          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 397          assert(stobj->buffer);
 398
 399          vbuffer[attr].buffer = NULL;
 400          pipe_resource_reference(&vbuffer[attr].buffer, stobj->buffer);
 401          vbuffer[attr].buffer_offset = pointer_to_offset(arrays[mesaAttr]->Ptr);
 402       }
 403       else {
 404          /* wrap user data */
 405          if (arrays[mesaAttr]->Ptr) {
 406             vbuffer[attr].buffer =
 407                pipe_user_buffer_create(pipe->screen,
 408                                        (void *) arrays[mesaAttr]->Ptr,
 409                                        stride * (max_index + 1),
 410                                        PIPE_BIND_VERTEX_BUFFER);
 411          }
 412          else {
 413             /* no array, use ctx->Current.Attrib[] value */
 414             uint bytes = sizeof(ctx->Current.Attrib[0]);
 415             vbuffer[attr].buffer =
 416                pipe_user_buffer_create(pipe->screen,
 417                                        (void *) ctx->Current.Attrib[mesaAttr],
 418                                        bytes,
 419                                        PIPE_BIND_VERTEX_BUFFER);
 420             stride = 0;
 421          }
 422
 423          vbuffer[attr].buffer_offset = 0;
 424
 425          /* Track user vertex buffers. */
 426          pipe_resource_reference(&st->user_vb[attr], vbuffer->buffer);
 427          st->user_vb_stride[attr] = stride;
 428          st->num_user_vbs = MAX2(st->num_user_vbs, attr+1);
 429       }
 430
 431       /* common-case setup */
 432       vbuffer[attr].stride = stride; /* in bytes */
 433
 434       velements[attr].src_offset = 0;
 435       velements[attr].instance_divisor = arrays[mesaAttr]->InstanceDivisor;
 436       velements[attr].vertex_buffer_index = attr;
 437       velements[attr].src_format
 438          = st_pipe_vertex_format(arrays[mesaAttr]->Type,
 439                                  arrays[mesaAttr]->Size,
 440                                  arrays[mesaAttr]->Format,
 441                                  arrays[mesaAttr]->Normalized);
 442       assert(velements[attr].src_format);
 443    }
 444 }
 445
 446
 447 static void
 448 setup_index_buffer(struct gl_context *ctx,
 449                    const struct _mesa_index_buffer *ib,
 450                    struct pipe_index_buffer *ibuffer)
 451 {
 452    struct st_context *st = st_context(ctx);
 453    struct pipe_context *pipe = st->pipe;
 454
 455    memset(ibuffer, 0, sizeof(*ibuffer));
 456    if (ib) {
 457       struct gl_buffer_object *bufobj = ib->obj;
 458
 459       switch (ib->type) {
 460       case GL_UNSIGNED_INT:
 461          ibuffer->index_size = 4;
 462          break;
 463       case GL_UNSIGNED_SHORT:
 464          ibuffer->index_size = 2;
 465          break;
 466       case GL_UNSIGNED_BYTE:
 467          ibuffer->index_size = 1;
 468          break;
 469       default:
 470          assert(0);
 471          return;
 472       }
 473
 474       /* get/create the index buffer object */
 475       if (bufobj && bufobj->Name) {
 476          /* elements/indexes are in a real VBO */
 477          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 478          pipe_resource_reference(&ibuffer->buffer, stobj->buffer);
 479          ibuffer->offset = pointer_to_offset(ib->ptr);
 480       }
 481       else {
 482          /* element/indicies are in user space memory */
 483          ibuffer->buffer =
 484             pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,
 485                                     ib->count * ibuffer->index_size,
 486                                     PIPE_BIND_INDEX_BUFFER);
 487       }
 488    }
 489 }
 490
 491 /**
 492  * Prior to drawing, check that any uniforms referenced by the
 493  * current shader have been set.  If a uniform has not been set,
 494  * issue a warning.
 495  */
 496 static void
 497 check_uniforms(struct gl_context *ctx)
 498 {
 499    struct gl_shader_program *shProg[3] = {
 500       ctx->Shader.CurrentVertexProgram,
 501       ctx->Shader.CurrentGeometryProgram,
 502       ctx->Shader.CurrentFragmentProgram,
 503    };
 504    unsigned j;
 505
 506    for (j = 0; j < 3; j++) {
 507       unsigned i;
 508
 509       if (shProg[j] == NULL || !shProg[j]->LinkStatus)
 510          continue;
 511
 512       for (i = 0; i < shProg[j]->Uniforms->NumUniforms; i++) {
 513          const struct gl_uniform *u = &shProg[j]->Uniforms->Uniforms[i];
 514          if (!u->Initialized) {
 515             _mesa_warning(ctx,
 516                           "Using shader with uninitialized uniform: %s",
 517                           u->Name);
 518          }
 519       }
 520    }
 521 }
 522
 523
 524 /**
 525  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
 526  * the corresponding Gallium type.
 527  */
 528 static unsigned
 529 translate_prim(const struct gl_context *ctx, unsigned prim)
 530 {
 531    /* GL prims should match Gallium prims, spot-check a few */
 532    assert(GL_POINTS == PIPE_PRIM_POINTS);
 533    assert(GL_QUADS == PIPE_PRIM_QUADS);
 534    assert(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 535
 536    /* Avoid quadstrips if it's easy to do so:
 537     * Note: it's imporant to do the correct trimming if we change the prim type!
 538     * We do that wherever this function is called.
 539     */
 540    if (prim == GL_QUAD_STRIP &&
 541        ctx->Light.ShadeModel != GL_FLAT &&
 542        ctx->Polygon.FrontMode == GL_FILL &&
 543        ctx->Polygon.BackMode == GL_FILL)
 544       prim = GL_TRIANGLE_STRIP;
 545
 546    return prim;
 547 }
 548
 549
 550 static void
 551 st_validate_varrays(struct gl_context *ctx,
 552                     const struct gl_client_array **arrays,
 553                     unsigned max_index)
 554 {
 555    struct st_context *st = st_context(ctx);
 556    const struct st_vertex_program *vp;
 557    const struct st_vp_variant *vpv;
 558    struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
 559    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 560    unsigned num_vbuffers, num_velements;
 561    GLuint attr;
 562    unsigned i;
 563
 564    /* must get these after state validation! */
 565    vp = st->vp;
 566    vpv = st->vp_variant;
 567
 568    memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs);
 569
 570    /* Unreference any user vertex buffers. */
 571    for (i = 0; i < st->num_user_vbs; i++) {
 572       pipe_resource_reference(&st->user_vb[i], NULL);
 573    }
 574    st->num_user_vbs = 0;
 575
 576    /*
 577     * Setup the vbuffer[] and velements[] arrays.
 578     */
 579    if (is_interleaved_arrays(vp, vpv, arrays)) {
 580       setup_interleaved_attribs(ctx, vp, vpv, arrays, vbuffer, velements,
 581                                 max_index);
 582       num_vbuffers = 1;
 583       num_velements = vpv->num_inputs;
 584       if (num_velements == 0)
 585          num_vbuffers = 0;
 586    }
 587    else {
 588       setup_non_interleaved_attribs(ctx, vp, vpv, arrays,
 589                                     vbuffer, velements, max_index);
 590       num_vbuffers = vpv->num_inputs;
 591       num_velements = vpv->num_inputs;
 592    }
 593
 594    cso_set_vertex_buffers(st->cso_context, num_vbuffers, vbuffer);
 595    cso_set_vertex_elements(st->cso_context, num_velements, velements);
 596
 597    /* unreference buffers (frees wrapped user-space buffer objects)
 598     * This is OK, because the pipe driver should reference buffers by itself
 599     * in set_vertex_buffers. */
 600    for (attr = 0; attr < num_vbuffers; attr++) {
 601       pipe_resource_reference(&vbuffer[attr].buffer, NULL);
 602       assert(!vbuffer[attr].buffer);
 603    }
 604 }
 605
 606
 607 /**
 608  * This function gets plugged into the VBO module and is called when
 609  * we have something to render.
 610  * Basically, translate the information into the format expected by gallium.
 611  */
 612 void
 613 st_draw_vbo(struct gl_context *ctx,
 614             const struct gl_client_array **arrays,
 615             const struct _mesa_prim *prims,
 616             GLuint nr_prims,
 617             const struct _mesa_index_buffer *ib,
 618             GLboolean index_bounds_valid,
 619             GLuint min_index,
 620             GLuint max_index)
 621 {
 622    struct st_context *st = st_context(ctx);
 623    struct pipe_context *pipe = st->pipe;
 624    struct pipe_index_buffer ibuffer;
 625    struct pipe_draw_info info;
 626    unsigned i;
 627    GLboolean new_array = GL_TRUE;
 628    /* Fix this (Bug 34378):
 629    GLboolean new_array =
 630          st->dirty.st && (st->dirty.mesa & (_NEW_ARRAY | _NEW_PROGRAM)) != 0;*/
 631
 632    /* Mesa core state should have been validated already */
 633    assert(ctx->NewState == 0x0);
 634
 635    if (ib) {
 636       /* Gallium probably doesn't want this in some cases. */
 637       if (!index_bounds_valid)
 638          if (!vbo_all_varyings_in_vbos(arrays))
 639             vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
 640    } else {
 641       /* Get min/max index for non-indexed drawing. */
 642       min_index = ~0;
 643       max_index = 0;
 644
 645       for (i = 0; i < nr_prims; i++) {
 646          min_index = MIN2(min_index, prims[i].start);
 647          max_index = MAX2(max_index, prims[i].start + prims[i].count - 1);
 648       }
 649    }
 650
 651    /* Validate state. */
 652    if (st->dirty.st) {
 653       GLboolean vertDataEdgeFlags;
 654
 655       /* sanity check for pointer arithmetic below */
 656       assert(sizeof(arrays[0]->Ptr[0]) == 1);
 657
 658       vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj &&
 659                           arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name;
 660       if (vertDataEdgeFlags != st->vertdata_edgeflags) {
 661          st->vertdata_edgeflags = vertDataEdgeFlags;
 662          st->dirty.st |= ST_NEW_EDGEFLAGS_DATA;
 663       }
 664
 665       st_validate_state(st);
 666
 667       if (new_array) {
 668          st_validate_varrays(ctx, arrays, max_index);
 669       }
 670
 671 #if 0
 672       if (MESA_VERBOSE & VERBOSE_GLSL) {
 673          check_uniforms(ctx);
 674       }
 675 #else
 676       (void) check_uniforms;
 677 #endif
 678    }
 679
 680    /* Notify the driver that the content of user buffers may have been
 681     * changed. */
 682    if (!new_array && st->num_user_vbs) {
 683       for (i = 0; i < st->num_user_vbs; i++) {
 684          if (st->user_vb[i]) {
 685             unsigned stride = st->user_vb_stride[i];
 686
 687             if (stride) {
 688                pipe->redefine_user_buffer(pipe, st->user_vb[i],
 689                                           min_index * stride,
 690                                           (max_index + 1 - min_index) * stride);
 691             } else {
 692                /* stride == 0 */
 693                pipe->redefine_user_buffer(pipe, st->user_vb[i],
 694                                           0, st->user_vb[i]->width0);
 695             }
 696          }
 697       }
 698    }
 699
 700    setup_index_buffer(ctx, ib, &ibuffer);
 701    pipe->set_index_buffer(pipe, &ibuffer);
 702
 703    util_draw_init_info(&info);
 704    if (ib) {
 705       info.indexed = TRUE;
 706       if (min_index != ~0 && max_index != ~0) {
 707          info.min_index = min_index;
 708          info.max_index = max_index;
 709       }
 710    }
 711
 712    info.primitive_restart = st->ctx->Array.PrimitiveRestart;
 713    info.restart_index = st->ctx->Array.RestartIndex;
 714
 715    /* do actual drawing */
 716    for (i = 0; i < nr_prims; i++) {
 717       info.mode = translate_prim( ctx, prims[i].mode );
 718       info.start = prims[i].start;
 719       info.count = prims[i].count;
 720       info.instance_count = prims[i].num_instances;
 721       info.index_bias = prims[i].basevertex;
 722       if (!ib) {
 723          info.min_index = info.start;
 724          info.max_index = info.start + info.count - 1;
 725       }
 726
 727       if (u_trim_pipe_prim(info.mode, &info.count))
 728          pipe->draw_vbo(pipe, &info);
 729    }
 730
 731    pipe_resource_reference(&ibuffer.buffer, NULL);
 732 }
 733
 734
 735 void st_init_draw( struct st_context *st )
 736 {
 737    struct gl_context *ctx = st->ctx;
 738
 739    vbo_set_draw_func(ctx, st_draw_vbo);
 740
 741 #if FEATURE_feedback || FEATURE_rastpos
 742    st->draw = draw_create(st->pipe); /* for selection/feedback */
 743
 744    /* Disable draw options that might convert points/lines to tris, etc.
 745     * as that would foul-up feedback/selection mode.
 746     */
 747    draw_wide_line_threshold(st->draw, 1000.0f);
 748    draw_wide_point_threshold(st->draw, 1000.0f);
 749    draw_enable_line_stipple(st->draw, FALSE);
 750    draw_enable_point_sprites(st->draw, FALSE);
 751 #endif
 752 }
 753
 754
 755 void st_destroy_draw( struct st_context *st )
 756 {
 757 #if FEATURE_feedback || FEATURE_rastpos
 758    draw_destroy(st->draw);
 759 #endif
 760 }
 761
 762