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   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   */
  32
  33 #include "main/imports.h"
  34 #include "main/image.h"
  35
  36 #include "vbo/vbo.h"
  37
  38 #include "st_atom.h"
  39 #include "st_context.h"
  40 #include "st_cb_bufferobjects.h"
  41 #include "st_draw.h"
  42 #include "st_program.h"
  43
  44 #include "pipe/p_context.h"
  45 #include "pipe/p_defines.h"
  46 #include "pipe/p_winsys.h"
  47 #include "pipe/p_inlines.h"
  48
  49 #include "draw/draw_private.h"
  50 #include "draw/draw_context.h"
  51
  52
  53 static GLuint double_types[4] = {
  54    PIPE_FORMAT_R64_FLOAT,
  55    PIPE_FORMAT_R64G64_FLOAT,
  56    PIPE_FORMAT_R64G64B64_FLOAT,
  57    PIPE_FORMAT_R64G64B64A64_FLOAT
  58 };
  59
  60 static GLuint float_types[4] = {
  61    PIPE_FORMAT_R32_FLOAT,
  62    PIPE_FORMAT_R32G32_FLOAT,
  63    PIPE_FORMAT_R32G32B32_FLOAT,
  64    PIPE_FORMAT_R32G32B32A32_FLOAT
  65 };
  66
  67 static GLuint uint_types_norm[4] = {
  68    PIPE_FORMAT_R32_UNORM,
  69    PIPE_FORMAT_R32G32_UNORM,
  70    PIPE_FORMAT_R32G32B32_UNORM,
  71    PIPE_FORMAT_R32G32B32A32_UNORM
  72 };
  73
  74 static GLuint uint_types_scale[4] = {
  75    PIPE_FORMAT_R32_USCALED,
  76    PIPE_FORMAT_R32G32_USCALED,
  77    PIPE_FORMAT_R32G32B32_USCALED,
  78    PIPE_FORMAT_R32G32B32A32_USCALED
  79 };
  80
  81 static GLuint int_types_norm[4] = {
  82    PIPE_FORMAT_R32_SNORM,
  83    PIPE_FORMAT_R32G32_SNORM,
  84    PIPE_FORMAT_R32G32B32_SNORM,
  85    PIPE_FORMAT_R32G32B32A32_SNORM
  86 };
  87
  88 static GLuint int_types_scale[4] = {
  89    PIPE_FORMAT_R32_SSCALED,
  90    PIPE_FORMAT_R32G32_SSCALED,
  91    PIPE_FORMAT_R32G32B32_SSCALED,
  92    PIPE_FORMAT_R32G32B32A32_SSCALED
  93 };
  94
  95 static GLuint ushort_types_norm[4] = {
  96    PIPE_FORMAT_R16_UNORM,
  97    PIPE_FORMAT_R16G16_UNORM,
  98    PIPE_FORMAT_R16G16B16_UNORM,
  99    PIPE_FORMAT_R16G16B16A16_UNORM
 100 };
 101
 102 static GLuint ushort_types_scale[4] = {
 103    PIPE_FORMAT_R16_USCALED,
 104    PIPE_FORMAT_R16G16_USCALED,
 105    PIPE_FORMAT_R16G16B16_USCALED,
 106    PIPE_FORMAT_R16G16B16A16_USCALED
 107 };
 108
 109 static GLuint short_types_norm[4] = {
 110    PIPE_FORMAT_R16_SNORM,
 111    PIPE_FORMAT_R16G16_SNORM,
 112    PIPE_FORMAT_R16G16B16_SNORM,
 113    PIPE_FORMAT_R16G16B16A16_SNORM
 114 };
 115
 116 static GLuint short_types_scale[4] = {
 117    PIPE_FORMAT_R16_SSCALED,
 118    PIPE_FORMAT_R16G16_SSCALED,
 119    PIPE_FORMAT_R16G16B16_SSCALED,
 120    PIPE_FORMAT_R16G16B16A16_SSCALED
 121 };
 122
 123 static GLuint ubyte_types_norm[4] = {
 124    PIPE_FORMAT_R8_UNORM,
 125    PIPE_FORMAT_R8G8_UNORM,
 126    PIPE_FORMAT_R8G8B8_UNORM,
 127    PIPE_FORMAT_R8G8B8A8_UNORM
 128 };
 129
 130 static GLuint ubyte_types_scale[4] = {
 131    PIPE_FORMAT_R8_USCALED,
 132    PIPE_FORMAT_R8G8_USCALED,
 133    PIPE_FORMAT_R8G8B8_USCALED,
 134    PIPE_FORMAT_R8G8B8A8_USCALED
 135 };
 136
 137 static GLuint byte_types_norm[4] = {
 138    PIPE_FORMAT_R8_SNORM,
 139    PIPE_FORMAT_R8G8_SNORM,
 140    PIPE_FORMAT_R8G8B8_SNORM,
 141    PIPE_FORMAT_R8G8B8A8_SNORM
 142 };
 143
 144 static GLuint byte_types_scale[4] = {
 145    PIPE_FORMAT_R8_SSCALED,
 146    PIPE_FORMAT_R8G8_SSCALED,
 147    PIPE_FORMAT_R8G8B8_SSCALED,
 148    PIPE_FORMAT_R8G8B8A8_SSCALED
 149 };
 150
 151
 152 /**
 153  * Return a PIPE_FORMAT_x for the given GL datatype and size.
 154  */
 155 static GLuint
 156 pipe_vertex_format(GLenum type, GLuint size, GLboolean normalized)
 157 {
 158    assert(type >= GL_BYTE);
 159    assert(type <= GL_DOUBLE);
 160    assert(size >= 1);
 161    assert(size <= 4);
 162
 163    if (normalized) {
 164       switch (type) {
 165       case GL_DOUBLE: return double_types[size-1];
 166       case GL_FLOAT: return float_types[size-1];
 167       case GL_INT: return int_types_norm[size-1];
 168       case GL_SHORT: return short_types_norm[size-1];
 169       case GL_BYTE: return byte_types_norm[size-1];
 170       case GL_UNSIGNED_INT: return uint_types_norm[size-1];
 171       case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1];
 172       case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1];
 173       default: assert(0); return 0;
 174       }
 175    }
 176    else {
 177       switch (type) {
 178       case GL_DOUBLE: return double_types[size-1];
 179       case GL_FLOAT: return float_types[size-1];
 180       case GL_INT: return int_types_scale[size-1];
 181       case GL_SHORT: return short_types_scale[size-1];
 182       case GL_BYTE: return byte_types_scale[size-1];
 183       case GL_UNSIGNED_INT: return uint_types_scale[size-1];
 184       case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1];
 185       case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1];
 186       default: assert(0); return 0;
 187       }
 188    }
 189    return 0; /* silence compiler warning */
 190 }
 191
 192
 193 /*
 194  * If edge flags are needed, setup an bitvector of flags and call
 195  * pipe->set_edgeflags().
 196  * XXX memleak: need to free the returned pointer at some point
 197  */
 198 static void *
 199 setup_edgeflags(GLcontext *ctx, GLenum primMode, GLint start, GLint count,
 200                 const struct gl_client_array *array)
 201 {
 202    struct pipe_context *pipe = ctx->st->pipe;
 203
 204    if ((primMode == GL_TRIANGLES ||
 205         primMode == GL_QUADS ||
 206         primMode == GL_POLYGON) &&
 207        (ctx->Polygon.FrontMode != GL_FILL ||
 208         ctx->Polygon.BackMode != GL_FILL)) {
 209       /* need edge flags */
 210       GLuint i;
 211       unsigned *vec;
 212       struct st_buffer_object *stobj = st_buffer_object(array->BufferObj);
 213       ubyte *map;
 214
 215       if (!stobj)
 216          return NULL;
 217
 218       vec = (unsigned *) calloc(sizeof(unsigned), (count + 31) / 32);
 219       if (!vec)
 220          return NULL;
 221
 222       map = pipe->winsys->buffer_map(pipe->winsys, stobj->buffer,
 223                                      PIPE_BUFFER_USAGE_CPU_READ);
 224       map = ADD_POINTERS(map, array->Ptr);
 225
 226       for (i = 0; i < count; i++) {
 227          if (*((float *) map))
 228             vec[i/32] |= 1 << (i % 32);
 229
 230          map += array->StrideB;
 231       }
 232
 233       pipe->winsys->buffer_unmap(pipe->winsys, stobj->buffer);
 234
 235       pipe->set_edgeflags(pipe, vec);
 236
 237       return vec;
 238    }
 239    else {
 240       /* edge flags not needed */
 241       pipe->set_edgeflags(pipe, NULL);
 242       return NULL;
 243    }
 244 }
 245
 246
 247
 248 /**
 249  * This function gets plugged into the VBO module and is called when
 250  * we have something to render.
 251  * Basically, translate the information into the format expected by pipe.
 252  */
 253 void
 254 st_draw_vbo(GLcontext *ctx,
 255             const struct gl_client_array **arrays,
 256             const struct _mesa_prim *prims,
 257             GLuint nr_prims,
 258             const struct _mesa_index_buffer *ib,
 259             GLuint min_index,
 260             GLuint max_index)
 261 {
 262    struct pipe_context *pipe = ctx->st->pipe;
 263    struct pipe_winsys *winsys = pipe->winsys;
 264    const struct st_vertex_program *vp;
 265    const struct pipe_shader_state *vs;
 266    struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
 267    GLuint attr;
 268    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 269
 270    /* sanity check for pointer arithmetic below */
 271    assert(sizeof(arrays[0]->Ptr[0]) == 1);
 272
 273    st_validate_state(ctx->st);
 274
 275    /* must get these after state validation! */
 276    vp = ctx->st->vp;
 277    vs = &ctx->st->vp->state;
 278
 279    /* loop over TGSI shader inputs to determine vertex buffer
 280     * and attribute info
 281     */
 282    for (attr = 0; attr < vp->num_inputs; attr++) {
 283       const GLuint mesaAttr = vp->index_to_input[attr];
 284       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 285
 286       if (bufobj && bufobj->Name) {
 287          /* Attribute data is in a VBO.
 288           * Recall that for VBOs, the gl_client_array->Ptr field is
 289           * really an offset from the start of the VBO, not a pointer.
 290           */
 291          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 292          assert(stobj->buffer);
 293
 294          vbuffer[attr].buffer = NULL;
 295          pipe_buffer_reference(winsys, &vbuffer[attr].buffer, stobj->buffer);
 296          vbuffer[attr].buffer_offset = (unsigned) arrays[0]->Ptr;/* in bytes */
 297          velements[attr].src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr;
 298          assert(velements[attr].src_offset <= 2048); /* 11-bit field */
 299       }
 300       else {
 301          /* attribute data is in user-space memory, not a VBO */
 302          uint bytes;
 303
 304          if (!arrays[mesaAttr]->StrideB) {
 305             bytes = arrays[mesaAttr]->Size
 306                     * _mesa_sizeof_type(arrays[mesaAttr]->Type);
 307          } else {
 308             bytes = arrays[mesaAttr]->StrideB * (max_index + 1);
 309          }
 310
 311          /* wrap user data */
 312          vbuffer[attr].buffer
 313             = winsys->user_buffer_create(winsys,
 314                                          (void *) arrays[mesaAttr]->Ptr,
 315                                          bytes);
 316          vbuffer[attr].buffer_offset = 0;
 317          velements[attr].src_offset = 0;
 318       }
 319
 320       /* common-case setup */
 321       vbuffer[attr].pitch = arrays[mesaAttr]->StrideB; /* in bytes */
 322       vbuffer[attr].max_index = max_index;
 323       velements[attr].vertex_buffer_index = attr;
 324       velements[attr].nr_components = arrays[mesaAttr]->Size;
 325       velements[attr].src_format
 326          = pipe_vertex_format(arrays[mesaAttr]->Type,
 327                               arrays[mesaAttr]->Size,
 328                               arrays[mesaAttr]->Normalized);
 329       assert(velements[attr].src_format);
 330    }
 331
 332    pipe->set_vertex_buffers(pipe, vp->num_inputs, vbuffer);
 333    pipe->set_vertex_elements(pipe, vp->num_inputs, velements);
 334
 335    /* do actual drawing */
 336    if (ib) {
 337       /* indexed primitive */
 338       struct gl_buffer_object *bufobj = ib->obj;
 339       struct pipe_buffer *indexBuf = NULL;
 340       unsigned indexSize, indexOffset, i;
 341
 342       switch (ib->type) {
 343       case GL_UNSIGNED_INT:
 344          indexSize = 4;
 345          break;
 346       case GL_UNSIGNED_SHORT:
 347          indexSize = 2;
 348          break;
 349       case GL_UNSIGNED_BYTE:
 350          indexSize = 1;
 351          break;
 352       default:
 353          assert(0);
 354          return;
 355       }
 356
 357       /* get/create the index buffer object */
 358       if (bufobj && bufobj->Name) {
 359          /* elements/indexes are in a real VBO */
 360          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 361          pipe_buffer_reference(winsys, &indexBuf, stobj->buffer);
 362          indexOffset = (unsigned) ib->ptr / indexSize;
 363       }
 364       else {
 365          /* element/indicies are in user space memory */
 366          indexBuf = winsys->user_buffer_create(winsys,
 367                                                (void *) ib->ptr,
 368                                                ib->count * indexSize);
 369          indexOffset = 0;
 370       }
 371
 372       /* draw */
 373       for (i = 0; i < nr_prims; i++) {
 374          setup_edgeflags(ctx, prims[i].mode,
 375                          prims[i].start + indexOffset, prims[i].count,
 376                          arrays[VERT_ATTRIB_EDGEFLAG]);
 377
 378          pipe->draw_elements(pipe, indexBuf, indexSize,
 379                              prims[i].mode,
 380                              prims[i].start + indexOffset, prims[i].count);
 381       }
 382
 383       pipe_buffer_reference(winsys, &indexBuf, NULL);
 384    }
 385    else {
 386       /* non-indexed */
 387       GLuint i;
 388       for (i = 0; i < nr_prims; i++) {
 389          setup_edgeflags(ctx, prims[i].mode,
 390                          prims[i].start, prims[i].count,
 391                          arrays[VERT_ATTRIB_EDGEFLAG]);
 392
 393          pipe->draw_arrays(pipe, prims[i].mode, prims[i].start, prims[i].count);
 394       }
 395    }
 396
 397    /* unreference buffers (frees wrapped user-space buffer objects) */
 398    for (attr = 0; attr < vp->num_inputs; attr++) {
 399       pipe_buffer_reference(winsys, &vbuffer[attr].buffer, NULL);
 400       assert(!vbuffer[attr].buffer);
 401    }
 402    pipe->set_vertex_buffers(pipe, vp->num_inputs, vbuffer);
 403 }
 404
 405
 406
 407 /**
 408  * Set the (private) draw module's post-transformed vertex format when in
 409  * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
 410  */
 411 static void
 412 set_feedback_vertex_format(GLcontext *ctx)
 413 {
 414 #if 0
 415    struct st_context *st = ctx->st;
 416    struct vertex_info vinfo;
 417    GLuint i;
 418
 419    memset(&vinfo, 0, sizeof(vinfo));
 420
 421    if (ctx->RenderMode == GL_SELECT) {
 422       assert(ctx->RenderMode == GL_SELECT);
 423       vinfo.num_attribs = 1;
 424       vinfo.format[0] = FORMAT_4F;
 425       vinfo.interp_mode[0] = INTERP_LINEAR;
 426    }
 427    else {
 428       /* GL_FEEDBACK, or glRasterPos */
 429       /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
 430       vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
 431       for (i = 0; i < vinfo.num_attribs; i++) {
 432          vinfo.format[i] = FORMAT_4F;
 433          vinfo.interp_mode[i] = INTERP_LINEAR;
 434       }
 435    }
 436
 437    draw_set_vertex_info(st->draw, &vinfo);
 438 #endif
 439 }
 440
 441
 442 /**
 443  * Called by VBO to draw arrays when in selection or feedback mode and
 444  * to implement glRasterPos.
 445  * This is very much like the normal draw_vbo() function above.
 446  * Look at code refactoring some day.
 447  * Might move this into the failover module some day.
 448  */
 449 void
 450 st_feedback_draw_vbo(GLcontext *ctx,
 451                      const struct gl_client_array **arrays,
 452                      const struct _mesa_prim *prims,
 453                      GLuint nr_prims,
 454                      const struct _mesa_index_buffer *ib,
 455                      GLuint min_index,
 456                      GLuint max_index)
 457 {
 458    struct st_context *st = ctx->st;
 459    struct pipe_context *pipe = st->pipe;
 460    struct draw_context *draw = st->draw;
 461    struct pipe_winsys *winsys = pipe->winsys;
 462    const struct st_vertex_program *vp;
 463    const struct pipe_shader_state *vs;
 464    struct pipe_buffer *index_buffer_handle = 0;
 465    struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
 466    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 467    GLuint attr, i;
 468    ubyte *mapped_constants;
 469
 470    assert(draw);
 471
 472    st_validate_state(ctx->st);
 473
 474    /* must get these after state validation! */
 475    vp = ctx->st->vp;
 476    vs = &st->vp->state;
 477
 478    if (!st->vp->draw_shader) {
 479       st->vp->draw_shader = draw_create_vertex_shader(draw, vs);
 480    }
 481
 482    /*
 483     * Set up the draw module's state.
 484     *
 485     * We'd like to do this less frequently, but the normal state-update
 486     * code sends state updates to the pipe, not to our private draw module.
 487     */
 488    assert(draw);
 489    draw_set_viewport_state(draw, &st->state.viewport);
 490    draw_set_clip_state(draw, &st->state.clip);
 491    draw_set_rasterizer_state(draw, &st->state.rasterizer);
 492    draw_bind_vertex_shader(draw, st->vp->draw_shader);
 493    set_feedback_vertex_format(ctx);
 494
 495    /* loop over TGSI shader inputs to determine vertex buffer
 496     * and attribute info
 497     */
 498    for (attr = 0; attr < vp->num_inputs; attr++) {
 499       const GLuint mesaAttr = vp->index_to_input[attr];
 500       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 501       void *map;
 502
 503       if (bufobj && bufobj->Name) {
 504          /* Attribute data is in a VBO.
 505           * Recall that for VBOs, the gl_client_array->Ptr field is
 506           * really an offset from the start of the VBO, not a pointer.
 507           */
 508          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 509          assert(stobj->buffer);
 510
 511          vbuffers[attr].buffer = NULL;
 512          pipe_buffer_reference(winsys, &vbuffers[attr].buffer, stobj->buffer);
 513          vbuffers[attr].buffer_offset = (unsigned) arrays[0]->Ptr;/* in bytes */
 514          velements[attr].src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr;
 515       }
 516       else {
 517          /* attribute data is in user-space memory, not a VBO */
 518          uint bytes = (arrays[mesaAttr]->Size
 519                        * _mesa_sizeof_type(arrays[mesaAttr]->Type)
 520                        * (max_index + 1));
 521
 522          /* wrap user data */
 523          vbuffers[attr].buffer
 524             = winsys->user_buffer_create(winsys,
 525                                          (void *) arrays[mesaAttr]->Ptr,
 526                                          bytes);
 527          vbuffers[attr].buffer_offset = 0;
 528          velements[attr].src_offset = 0;
 529       }
 530
 531       /* common-case setup */
 532       vbuffers[attr].pitch = arrays[mesaAttr]->StrideB; /* in bytes */
 533       vbuffers[attr].max_index = max_index;
 534       velements[attr].vertex_buffer_index = attr;
 535       velements[attr].nr_components = arrays[mesaAttr]->Size;
 536       velements[attr].src_format = pipe_vertex_format(arrays[mesaAttr]->Type,
 537                                                arrays[mesaAttr]->Size,
 538                                                arrays[mesaAttr]->Normalized);
 539       assert(velements[attr].src_format);
 540
 541       /* tell draw about this attribute */
 542 #if 0
 543       draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
 544 #endif
 545
 546       /* map the attrib buffer */
 547       map = pipe->winsys->buffer_map(pipe->winsys,
 548                                      vbuffers[attr].buffer,
 549                                      PIPE_BUFFER_USAGE_CPU_READ);
 550       draw_set_mapped_vertex_buffer(draw, attr, map);
 551    }
 552
 553    draw_set_vertex_buffers(draw, vp->num_inputs, vbuffers);
 554    draw_set_vertex_elements(draw, vp->num_inputs, velements);
 555
 556    if (ib) {
 557       unsigned indexSize;
 558       struct gl_buffer_object *bufobj = ib->obj;
 559       struct st_buffer_object *stobj = st_buffer_object(bufobj);
 560       index_buffer_handle = stobj->buffer;
 561       void *map;
 562
 563       switch (ib->type) {
 564       case GL_UNSIGNED_INT:
 565          indexSize = 4;
 566          break;
 567       case GL_UNSIGNED_SHORT:
 568          indexSize = 2;
 569          break;
 570       default:
 571          assert(0);
 572          return;
 573       }
 574
 575       map = pipe->winsys->buffer_map(pipe->winsys,
 576                                      index_buffer_handle,
 577                                      PIPE_BUFFER_USAGE_CPU_READ);
 578       draw_set_mapped_element_buffer(draw, indexSize, map);
 579    }
 580    else {
 581       /* no index/element buffer */
 582       draw_set_mapped_element_buffer(draw, 0, NULL);
 583    }
 584
 585
 586    /* map constant buffers */
 587    mapped_constants = winsys->buffer_map(winsys,
 588                                st->state.constants[PIPE_SHADER_VERTEX].buffer,
 589                                PIPE_BUFFER_USAGE_CPU_READ);
 590    draw_set_mapped_constant_buffer(st->draw, mapped_constants);
 591
 592
 593    /* draw here */
 594    for (i = 0; i < nr_prims; i++) {
 595       draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
 596    }
 597
 598
 599    /* unmap constant buffers */
 600    winsys->buffer_unmap(winsys, st->state.constants[PIPE_SHADER_VERTEX].buffer);
 601
 602    /*
 603     * unmap vertex/index buffers
 604     */
 605    for (i = 0; i < PIPE_MAX_ATTRIBS; i++) {
 606       if (draw->pt.vertex_buffer[i].buffer) {
 607          pipe->winsys->buffer_unmap(pipe->winsys,
 608                                     draw->pt.vertex_buffer[i].buffer);
 609          pipe_buffer_reference(winsys, &draw->pt.vertex_buffer[i].buffer, NULL);
 610          draw_set_mapped_vertex_buffer(draw, i, NULL);
 611       }
 612    }
 613    if (ib) {
 614       pipe->winsys->buffer_unmap(pipe->winsys, index_buffer_handle);
 615       draw_set_mapped_element_buffer(draw, 0, NULL);
 616    }
 617 }
 618
 619
 620
 621 void st_init_draw( struct st_context *st )
 622 {
 623    GLcontext *ctx = st->ctx;
 624
 625    vbo_set_draw_func(ctx, st_draw_vbo);
 626 }
 627
 628
 629 void st_destroy_draw( struct st_context *st )
 630 {
 631 }
 632
 633