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