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                           unsigned num_instances)
 312 {
 313    struct st_context *st = st_context(ctx);
 314    struct pipe_context *pipe = st->pipe;
 315    GLuint attr;
 316    const GLubyte *low_addr = NULL;
 317
 318    /* Find the lowest address. */
 319    if(vpv->num_inputs) {
 320       low_addr = arrays[vp->index_to_input[0]]->Ptr;
 321
 322       for (attr = 1; attr < vpv->num_inputs; attr++) {
 323          const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
 324          low_addr = MIN2(low_addr, start);
 325       }
 326    }
 327
 328    for (attr = 0; attr < vpv->num_inputs; attr++) {
 329       const GLuint mesaAttr = vp->index_to_input[attr];
 330       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 331       struct st_buffer_object *stobj = st_buffer_object(bufobj);
 332       GLsizei stride = arrays[mesaAttr]->StrideB;
 333
 334       if (attr == 0) {
 335          if (bufobj && bufobj->Name) {
 336             vbuffer->buffer = NULL;
 337             pipe_resource_reference(&vbuffer->buffer, stobj->buffer);
 338             vbuffer->buffer_offset = pointer_to_offset(low_addr);
 339          } else {
 340             uint divisor = arrays[mesaAttr]->InstanceDivisor;
 341             uint length = (divisor ? num_instances / divisor : max_index) + 1;
 342             vbuffer->buffer =
 343                pipe_user_buffer_create(pipe->screen, (void*)low_addr,
 344                                        stride * length,
 345                                        PIPE_BIND_VERTEX_BUFFER);
 346             vbuffer->buffer_offset = 0;
 347
 348             /* Track user vertex buffers. */
 349             pipe_resource_reference(&st->user_vb[0], vbuffer->buffer);
 350             st->user_vb_stride[0] = stride;
 351             st->num_user_vbs = 1;
 352          }
 353          vbuffer->stride = stride; /* in bytes */
 354       }
 355
 356       velements[attr].src_offset =
 357          (unsigned) (arrays[mesaAttr]->Ptr - low_addr);
 358       velements[attr].instance_divisor = arrays[mesaAttr]->InstanceDivisor;
 359       velements[attr].vertex_buffer_index = 0;
 360       velements[attr].src_format =
 361          st_pipe_vertex_format(arrays[mesaAttr]->Type,
 362                                arrays[mesaAttr]->Size,
 363                                arrays[mesaAttr]->Format,
 364                                arrays[mesaAttr]->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       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 393       GLsizei stride = arrays[mesaAttr]->StrideB;
 394
 395       if (bufobj && bufobj->Name) {
 396          /* Attribute data is in a VBO.
 397           * Recall that for VBOs, the gl_client_array->Ptr field is
 398           * really an offset from the start of the VBO, not a pointer.
 399           */
 400          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 401          assert(stobj->buffer);
 402
 403          vbuffer[attr].buffer = NULL;
 404          pipe_resource_reference(&vbuffer[attr].buffer, stobj->buffer);
 405          vbuffer[attr].buffer_offset = pointer_to_offset(arrays[mesaAttr]->Ptr);
 406       }
 407       else {
 408          /* wrap user data */
 409          if (arrays[mesaAttr]->Ptr) {
 410             uint divisor = arrays[mesaAttr]->InstanceDivisor;
 411             uint length = (divisor ? num_instances / divisor : max_index) + 1;
 412             vbuffer[attr].buffer =
 413                pipe_user_buffer_create(pipe->screen,
 414                                        (void *) arrays[mesaAttr]->Ptr,
 415                                        stride * length,
 416                                        PIPE_BIND_VERTEX_BUFFER);
 417          }
 418          else {
 419             /* no array, use ctx->Current.Attrib[] value */
 420             uint bytes = sizeof(ctx->Current.Attrib[0]);
 421             vbuffer[attr].buffer =
 422                pipe_user_buffer_create(pipe->screen,
 423                                        (void *) ctx->Current.Attrib[mesaAttr],
 424                                        bytes,
 425                                        PIPE_BIND_VERTEX_BUFFER);
 426             stride = 0;
 427          }
 428
 429          vbuffer[attr].buffer_offset = 0;
 430
 431          /* Track user vertex buffers. */
 432          pipe_resource_reference(&st->user_vb[attr], vbuffer[attr].buffer);
 433          st->user_vb_stride[attr] = stride;
 434          st->num_user_vbs = MAX2(st->num_user_vbs, attr+1);
 435       }
 436
 437       /* common-case setup */
 438       vbuffer[attr].stride = stride; /* in bytes */
 439
 440       velements[attr].src_offset = 0;
 441       velements[attr].instance_divisor = arrays[mesaAttr]->InstanceDivisor;
 442       velements[attr].vertex_buffer_index = attr;
 443       velements[attr].src_format
 444          = st_pipe_vertex_format(arrays[mesaAttr]->Type,
 445                                  arrays[mesaAttr]->Size,
 446                                  arrays[mesaAttr]->Format,
 447                                  arrays[mesaAttr]->Normalized);
 448       assert(velements[attr].src_format);
 449    }
 450 }
 451
 452
 453 static void
 454 setup_index_buffer(struct gl_context *ctx,
 455                    const struct _mesa_index_buffer *ib,
 456                    struct pipe_index_buffer *ibuffer)
 457 {
 458    struct st_context *st = st_context(ctx);
 459    struct pipe_context *pipe = st->pipe;
 460
 461    memset(ibuffer, 0, sizeof(*ibuffer));
 462    if (ib) {
 463       struct gl_buffer_object *bufobj = ib->obj;
 464
 465       switch (ib->type) {
 466       case GL_UNSIGNED_INT:
 467          ibuffer->index_size = 4;
 468          break;
 469       case GL_UNSIGNED_SHORT:
 470          ibuffer->index_size = 2;
 471          break;
 472       case GL_UNSIGNED_BYTE:
 473          ibuffer->index_size = 1;
 474          break;
 475       default:
 476          assert(0);
 477          return;
 478       }
 479
 480       /* get/create the index buffer object */
 481       if (bufobj && bufobj->Name) {
 482          /* elements/indexes are in a real VBO */
 483          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 484          pipe_resource_reference(&ibuffer->buffer, stobj->buffer);
 485          ibuffer->offset = pointer_to_offset(ib->ptr);
 486       }
 487       else {
 488          /* element/indicies are in user space memory */
 489          ibuffer->buffer =
 490             pipe_user_buffer_create(pipe->screen, (void *) ib->ptr,
 491                                     ib->count * ibuffer->index_size,
 492                                     PIPE_BIND_INDEX_BUFFER);
 493       }
 494    }
 495 }
 496
 497 /**
 498  * Prior to drawing, check that any uniforms referenced by the
 499  * current shader have been set.  If a uniform has not been set,
 500  * issue a warning.
 501  */
 502 static void
 503 check_uniforms(struct gl_context *ctx)
 504 {
 505    struct gl_shader_program *shProg[3] = {
 506       ctx->Shader.CurrentVertexProgram,
 507       ctx->Shader.CurrentGeometryProgram,
 508       ctx->Shader.CurrentFragmentProgram,
 509    };
 510    unsigned j;
 511
 512    for (j = 0; j < 3; j++) {
 513       unsigned i;
 514
 515       if (shProg[j] == NULL || !shProg[j]->LinkStatus)
 516          continue;
 517
 518       for (i = 0; i < shProg[j]->Uniforms->NumUniforms; i++) {
 519          const struct gl_uniform *u = &shProg[j]->Uniforms->Uniforms[i];
 520          if (!u->Initialized) {
 521             _mesa_warning(ctx,
 522                           "Using shader with uninitialized uniform: %s",
 523                           u->Name);
 524          }
 525       }
 526    }
 527 }
 528
 529
 530 /**
 531  * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
 532  * the corresponding Gallium type.
 533  */
 534 static unsigned
 535 translate_prim(const struct gl_context *ctx, unsigned prim)
 536 {
 537    /* GL prims should match Gallium prims, spot-check a few */
 538    assert(GL_POINTS == PIPE_PRIM_POINTS);
 539    assert(GL_QUADS == PIPE_PRIM_QUADS);
 540    assert(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
 541
 542    /* Avoid quadstrips if it's easy to do so:
 543     * Note: it's imporant to do the correct trimming if we change the prim type!
 544     * We do that wherever this function is called.
 545     */
 546    if (prim == GL_QUAD_STRIP &&
 547        ctx->Light.ShadeModel != GL_FLAT &&
 548        ctx->Polygon.FrontMode == GL_FILL &&
 549        ctx->Polygon.BackMode == GL_FILL)
 550       prim = GL_TRIANGLE_STRIP;
 551
 552    return prim;
 553 }
 554
 555
 556 static void
 557 st_validate_varrays(struct gl_context *ctx,
 558                     const struct gl_client_array **arrays,
 559                     unsigned max_index,
 560                     unsigned num_instances)
 561 {
 562    struct st_context *st = st_context(ctx);
 563    const struct st_vertex_program *vp;
 564    const struct st_vp_variant *vpv;
 565    struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS];
 566    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 567    unsigned num_vbuffers, num_velements;
 568    GLuint attr;
 569    unsigned i;
 570
 571    /* must get these after state validation! */
 572    vp = st->vp;
 573    vpv = st->vp_variant;
 574
 575    memset(velements, 0, sizeof(struct pipe_vertex_element) * vpv->num_inputs);
 576
 577    /* Unreference any user vertex buffers. */
 578    for (i = 0; i < st->num_user_vbs; i++) {
 579       pipe_resource_reference(&st->user_vb[i], NULL);
 580    }
 581    st->num_user_vbs = 0;
 582
 583    /*
 584     * Setup the vbuffer[] and velements[] arrays.
 585     */
 586    if (is_interleaved_arrays(vp, vpv, arrays)) {
 587       setup_interleaved_attribs(ctx, vp, vpv, arrays, vbuffer, velements,
 588                                 max_index, num_instances);
 589
 590       num_vbuffers = 1;
 591       num_velements = vpv->num_inputs;
 592       if (num_velements == 0)
 593          num_vbuffers = 0;
 594    }
 595    else {
 596       setup_non_interleaved_attribs(ctx, vp, vpv, arrays,
 597                                     vbuffer, velements, max_index, num_instances);
 598       num_vbuffers = vpv->num_inputs;
 599       num_velements = vpv->num_inputs;
 600    }
 601
 602    cso_set_vertex_buffers(st->cso_context, num_vbuffers, vbuffer);
 603    cso_set_vertex_elements(st->cso_context, num_velements, velements);
 604
 605    /* unreference buffers (frees wrapped user-space buffer objects)
 606     * This is OK, because the pipe driver should reference buffers by itself
 607     * in set_vertex_buffers. */
 608    for (attr = 0; attr < num_vbuffers; attr++) {
 609       pipe_resource_reference(&vbuffer[attr].buffer, NULL);
 610       assert(!vbuffer[attr].buffer);
 611    }
 612 }
 613
 614
 615 /**
 616  * This function gets plugged into the VBO module and is called when
 617  * we have something to render.
 618  * Basically, translate the information into the format expected by gallium.
 619  */
 620 void
 621 st_draw_vbo(struct gl_context *ctx,
 622             const struct gl_client_array **arrays,
 623             const struct _mesa_prim *prims,
 624             GLuint nr_prims,
 625             const struct _mesa_index_buffer *ib,
 626             GLboolean index_bounds_valid,
 627             GLuint min_index,
 628             GLuint max_index)
 629 {
 630    struct st_context *st = st_context(ctx);
 631    struct pipe_context *pipe = st->pipe;
 632    struct pipe_index_buffer ibuffer;
 633    struct pipe_draw_info info;
 634    unsigned i, num_instances = 1;
 635    GLboolean new_array =
 636          st->dirty.st && (st->dirty.mesa & (_NEW_ARRAY | _NEW_PROGRAM)) != 0;
 637
 638    /* Mesa core state should have been validated already */
 639    assert(ctx->NewState == 0x0);
 640
 641    if (ib) {
 642       /* Gallium probably doesn't want this in some cases. */
 643       if (!index_bounds_valid)
 644          if (!vbo_all_varyings_in_vbos(arrays))
 645             vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
 646
 647       for (i = 0; i < nr_prims; i++) {
 648          num_instances = MAX2(num_instances, prims[i].num_instances);
 649       }
 650    } else {
 651       /* Get min/max index for non-indexed drawing. */
 652       min_index = ~0;
 653       max_index = 0;
 654
 655       for (i = 0; i < nr_prims; i++) {
 656          min_index = MIN2(min_index, prims[i].start);
 657          max_index = MAX2(max_index, prims[i].start + prims[i].count - 1);
 658          num_instances = MAX2(num_instances, prims[i].num_instances);
 659       }
 660    }
 661
 662    /* Validate state. */
 663    if (st->dirty.st) {
 664       GLboolean vertDataEdgeFlags;
 665
 666       /* sanity check for pointer arithmetic below */
 667       assert(sizeof(arrays[0]->Ptr[0]) == 1);
 668
 669       vertDataEdgeFlags = arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj &&
 670                           arrays[VERT_ATTRIB_EDGEFLAG]->BufferObj->Name;
 671       if (vertDataEdgeFlags != st->vertdata_edgeflags) {
 672          st->vertdata_edgeflags = vertDataEdgeFlags;
 673          st->dirty.st |= ST_NEW_EDGEFLAGS_DATA;
 674       }
 675
 676       st_validate_state(st);
 677
 678       if (new_array) {
 679          st_validate_varrays(ctx, arrays, max_index, num_instances);
 680       }
 681
 682 #if 0
 683       if (MESA_VERBOSE & VERBOSE_GLSL) {
 684          check_uniforms(ctx);
 685       }
 686 #else
 687       (void) check_uniforms;
 688 #endif
 689    }
 690
 691    /* Notify the driver that the content of user buffers may have been
 692     * changed. */
 693    if (!new_array && st->num_user_vbs) {
 694       for (i = 0; i < st->num_user_vbs; i++) {
 695          if (st->user_vb[i]) {
 696             unsigned stride = st->user_vb_stride[i];
 697
 698             if (stride) {
 699                pipe->redefine_user_buffer(pipe, st->user_vb[i],
 700                                           min_index * stride,
 701                                           (max_index + 1 - min_index) * stride);
 702             } else {
 703                /* stride == 0 */
 704                pipe->redefine_user_buffer(pipe, st->user_vb[i],
 705                                           0, st->user_vb[i]->width0);
 706             }
 707          }
 708       }
 709    }
 710
 711    setup_index_buffer(ctx, ib, &ibuffer);
 712    pipe->set_index_buffer(pipe, &ibuffer);
 713
 714    util_draw_init_info(&info);
 715    if (ib) {
 716       info.indexed = TRUE;
 717       if (min_index != ~0 && max_index != ~0) {
 718          info.min_index = min_index;
 719          info.max_index = max_index;
 720       }
 721    }
 722
 723    info.primitive_restart = st->ctx->Array.PrimitiveRestart;
 724    info.restart_index = st->ctx->Array.RestartIndex;
 725
 726    /* do actual drawing */
 727    for (i = 0; i < nr_prims; i++) {
 728       info.mode = translate_prim( ctx, prims[i].mode );
 729       info.start = prims[i].start;
 730       info.count = prims[i].count;
 731       info.instance_count = prims[i].num_instances;
 732       info.index_bias = prims[i].basevertex;
 733       if (!ib) {
 734          info.min_index = info.start;
 735          info.max_index = info.start + info.count - 1;
 736       }
 737
 738       if (u_trim_pipe_prim(info.mode, &info.count))
 739          pipe->draw_vbo(pipe, &info);
 740    }
 741
 742    pipe_resource_reference(&ibuffer.buffer, NULL);
 743 }
 744
 745
 746 void st_init_draw( struct st_context *st )
 747 {
 748    struct gl_context *ctx = st->ctx;
 749
 750    vbo_set_draw_func(ctx, st_draw_vbo);
 751
 752 #if FEATURE_feedback || FEATURE_rastpos
 753    st->draw = draw_create(st->pipe); /* for selection/feedback */
 754
 755    /* Disable draw options that might convert points/lines to tris, etc.
 756     * as that would foul-up feedback/selection mode.
 757     */
 758    draw_wide_line_threshold(st->draw, 1000.0f);
 759    draw_wide_point_threshold(st->draw, 1000.0f);
 760    draw_enable_line_stipple(st->draw, FALSE);
 761    draw_enable_point_sprites(st->draw, FALSE);
 762 #endif
 763 }
 764
 765
 766 void st_destroy_draw( struct st_context *st )
 767 {
 768 #if FEATURE_feedback || FEATURE_rastpos
 769    draw_destroy(st->draw);
 770 #endif
 771 }
 772
 773