src/mesa/vbo/vbo_exec_array.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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 #include "main/glheader.h"
  29 #include "main/context.h"
  30 #include "main/state.h"
  31 #include "main/api_validate.h"
  32 #include "main/api_noop.h"
  33 #include "main/varray.h"
  34 #include "main/bufferobj.h"
  35 #include "glapi/dispatch.h"
  36
  37 #include "vbo_context.h"
  38
  39 /**
  40  * Compute min and max elements for glDraw[Range]Elements() calls.
  41  */
  42 static void get_minmax_index( GLuint count, GLuint type,
  43                               const GLvoid *indices,
  44                               GLuint *min_index,
  45                               GLuint *max_index)
  46 {
  47    GLuint i;
  48
  49    switch(type) {
  50    case GL_UNSIGNED_INT: {
  51       const GLuint *ui_indices = (const GLuint *)indices;
  52       GLuint max_ui = ui_indices[count-1];
  53       GLuint min_ui = ui_indices[0];
  54       for (i = 0; i < count; i++) {
  55          if (ui_indices[i] > max_ui) max_ui = ui_indices[i];
  56          if (ui_indices[i] < min_ui) min_ui = ui_indices[i];
  57       }
  58       *min_index = min_ui;
  59       *max_index = max_ui;
  60       break;
  61    }
  62    case GL_UNSIGNED_SHORT: {
  63       const GLushort *us_indices = (const GLushort *)indices;
  64       GLuint max_us = us_indices[count-1];
  65       GLuint min_us = us_indices[0];
  66       for (i = 0; i < count; i++) {
  67          if (us_indices[i] > max_us) max_us = us_indices[i];
  68          if (us_indices[i] < min_us) min_us = us_indices[i];
  69       }
  70       *min_index = min_us;
  71       *max_index = max_us;
  72       break;
  73    }
  74    case GL_UNSIGNED_BYTE: {
  75       const GLubyte *ub_indices = (const GLubyte *)indices;
  76       GLuint max_ub = ub_indices[count-1];
  77       GLuint min_ub = ub_indices[0];
  78       for (i = 0; i < count; i++) {
  79          if (ub_indices[i] > max_ub) max_ub = ub_indices[i];
  80          if (ub_indices[i] < min_ub) min_ub = ub_indices[i];
  81       }
  82       *min_index = min_ub;
  83       *max_index = max_ub;
  84       break;
  85    }
  86    default:
  87       assert(0);
  88       break;
  89    }
  90 }
  91
  92
  93 /**
  94  * Just translate the arrayobj into a sane layout.
  95  */
  96 static void bind_array_obj( GLcontext *ctx )
  97 {
  98    struct vbo_context *vbo = vbo_context(ctx);
  99    struct vbo_exec_context *exec = &vbo->exec;
 100    struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
 101    GLuint i;
 102
 103    /* TODO: Fix the ArrayObj struct to keep legacy arrays in an array
 104     * rather than as individual named arrays.  Then this function can
 105     * go away.
 106     */
 107    exec->array.legacy_array[VERT_ATTRIB_POS] = &arrayObj->Vertex;
 108    exec->array.legacy_array[VERT_ATTRIB_WEIGHT] = &arrayObj->Weight;
 109    exec->array.legacy_array[VERT_ATTRIB_NORMAL] = &arrayObj->Normal;
 110    exec->array.legacy_array[VERT_ATTRIB_COLOR0] = &arrayObj->Color;
 111    exec->array.legacy_array[VERT_ATTRIB_COLOR1] = &arrayObj->SecondaryColor;
 112    exec->array.legacy_array[VERT_ATTRIB_FOG] = &arrayObj->FogCoord;
 113    exec->array.legacy_array[VERT_ATTRIB_COLOR_INDEX] = &arrayObj->Index;
 114    if (arrayObj->PointSize.Enabled) {
 115       /* this aliases COLOR_INDEX */
 116       exec->array.legacy_array[VERT_ATTRIB_POINT_SIZE] = &arrayObj->PointSize;
 117    }
 118    exec->array.legacy_array[VERT_ATTRIB_EDGEFLAG] = &arrayObj->EdgeFlag;
 119
 120    for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
 121       exec->array.legacy_array[VERT_ATTRIB_TEX0 + i] = &arrayObj->TexCoord[i];
 122
 123    for (i = 0; i < MAX_VERTEX_GENERIC_ATTRIBS; i++) {
 124       assert(i < Elements(arrayObj->VertexAttrib));
 125       assert(i < Elements(exec->array.generic_array));
 126       exec->array.generic_array[i] = &arrayObj->VertexAttrib[i];
 127    }
 128
 129    exec->array.array_obj = arrayObj->Name;
 130 }
 131
 132
 133 static void recalculate_input_bindings( GLcontext *ctx )
 134 {
 135    struct vbo_context *vbo = vbo_context(ctx);
 136    struct vbo_exec_context *exec = &vbo->exec;
 137    const struct gl_client_array **inputs = &exec->array.inputs[0];
 138    GLbitfield const_inputs = 0x0;
 139    GLuint i;
 140
 141    exec->array.program_mode = get_program_mode(ctx);
 142    exec->array.enabled_flags = ctx->Array.ArrayObj->_Enabled;
 143
 144    switch (exec->array.program_mode) {
 145    case VP_NONE:
 146       /* When no vertex program is active (or the vertex program is generated
 147        * from fixed-function state).  We put the material values into the
 148        * generic slots.  This is the only situation where material values
 149        * are available as per-vertex attributes.
 150        */
 151       for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
 152          if (exec->array.legacy_array[i]->Enabled)
 153             inputs[i] = exec->array.legacy_array[i];
 154          else {
 155             inputs[i] = &vbo->legacy_currval[i];
 156             const_inputs |= 1 << i;
 157          }
 158       }
 159
 160       for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 161          inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->mat_currval[i];
 162          const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
 163       }
 164
 165       /* Could use just about anything, just to fill in the empty
 166        * slots:
 167        */
 168       for (i = MAT_ATTRIB_MAX; i < VERT_ATTRIB_MAX - VERT_ATTRIB_GENERIC0; i++) {
 169          inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];
 170          const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
 171       }
 172       break;
 173
 174    case VP_NV:
 175       /* NV_vertex_program - attribute arrays alias and override
 176        * conventional, legacy arrays.  No materials, and the generic
 177        * slots are vacant.
 178        */
 179       for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
 180          if (exec->array.generic_array[i]->Enabled)
 181             inputs[i] = exec->array.generic_array[i];
 182          else if (exec->array.legacy_array[i]->Enabled)
 183             inputs[i] = exec->array.legacy_array[i];
 184          else {
 185             inputs[i] = &vbo->legacy_currval[i];
 186             const_inputs |= 1 << i;
 187          }
 188       }
 189
 190       /* Could use just about anything, just to fill in the empty
 191        * slots:
 192        */
 193       for (i = VERT_ATTRIB_GENERIC0; i < VERT_ATTRIB_MAX; i++) {
 194          inputs[i] = &vbo->generic_currval[i - VERT_ATTRIB_GENERIC0];
 195          const_inputs |= 1 << i;
 196       }
 197       break;
 198
 199    case VP_ARB:
 200       /* GL_ARB_vertex_program or GLSL vertex shader - Only the generic[0]
 201        * attribute array aliases and overrides the legacy position array.
 202        *
 203        * Otherwise, legacy attributes available in the legacy slots,
 204        * generic attributes in the generic slots and materials are not
 205        * available as per-vertex attributes.
 206        */
 207       if (exec->array.generic_array[0]->Enabled)
 208          inputs[0] = exec->array.generic_array[0];
 209       else if (exec->array.legacy_array[0]->Enabled)
 210          inputs[0] = exec->array.legacy_array[0];
 211       else {
 212          inputs[0] = &vbo->legacy_currval[0];
 213          const_inputs |= 1 << 0;
 214       }
 215
 216       for (i = 1; i <= VERT_ATTRIB_TEX7; i++) {
 217          if (exec->array.legacy_array[i]->Enabled)
 218             inputs[i] = exec->array.legacy_array[i];
 219          else {
 220             inputs[i] = &vbo->legacy_currval[i];
 221             const_inputs |= 1 << i;
 222          }
 223       }
 224
 225       for (i = 0; i < MAX_VERTEX_GENERIC_ATTRIBS; i++) {
 226          if (exec->array.generic_array[i]->Enabled)
 227             inputs[VERT_ATTRIB_GENERIC0 + i] = exec->array.generic_array[i];
 228          else {
 229             inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];
 230             const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
 231          }
 232
 233       }
 234       break;
 235    }
 236
 237    _mesa_set_varying_vp_inputs( ctx, ~const_inputs );
 238 }
 239
 240
 241 static void bind_arrays( GLcontext *ctx )
 242 {
 243 #if 0
 244    if (ctx->Array.ArrayObj.Name != exec->array.array_obj) {
 245       bind_array_obj(ctx);
 246       recalculate_input_bindings(ctx);
 247    }
 248    else if (exec->array.program_mode != get_program_mode(ctx) ||
 249             exec->array.enabled_flags != ctx->Array.ArrayObj->_Enabled) {
 250
 251       recalculate_input_bindings(ctx);
 252    }
 253 #else
 254    bind_array_obj(ctx);
 255    recalculate_input_bindings(ctx);
 256 #endif
 257 }
 258
 259
 260
 261 /***********************************************************************
 262  * API functions.
 263  */
 264
 265 static void GLAPIENTRY
 266 vbo_exec_DrawArrays(GLenum mode, GLint start, GLsizei count)
 267 {
 268    GET_CURRENT_CONTEXT(ctx);
 269    struct vbo_context *vbo = vbo_context(ctx);
 270    struct vbo_exec_context *exec = &vbo->exec;
 271    struct _mesa_prim prim[1];
 272
 273    if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
 274       return;
 275
 276    FLUSH_CURRENT( ctx, 0 );
 277
 278    if (ctx->NewState)
 279       _mesa_update_state( ctx );
 280
 281    if (!vbo_validate_shaders(ctx)) {
 282       _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawArrays(bad shader)");
 283       return;
 284    }
 285
 286    bind_arrays( ctx );
 287
 288    /* Again... because we may have changed the bitmask of per-vertex varying
 289     * attributes.  If we regenerate the fixed-function vertex program now
 290     * we may be able to prune down the number of vertex attributes which we
 291     * need in the shader.
 292     */
 293    if (ctx->NewState)
 294       _mesa_update_state( ctx );
 295
 296    prim[0].begin = 1;
 297    prim[0].end = 1;
 298    prim[0].weak = 0;
 299    prim[0].pad = 0;
 300    prim[0].mode = mode;
 301    prim[0].start = start;
 302    prim[0].count = count;
 303    prim[0].indexed = 0;
 304
 305    vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL,
 306                     start, start + count - 1 );
 307
 308 #if 0
 309    {
 310       int i;
 311
 312       _mesa_printf("vbo_exec_DrawArrays(mode 0x%x, start %d, count %d):\n",
 313                    mode, start, count);
 314
 315       for (i = 0; i < 32; i++) {
 316          GLuint bufName = exec->array.inputs[i]->BufferObj->Name;
 317          GLint stride = exec->array.inputs[i]->Stride;
 318          _mesa_printf("attr %2d: size %d stride %d  enabled %d  "
 319                       "ptr %p  Bufobj %u\n",
 320                       i,
 321                       exec->array.inputs[i]->Size,
 322                       stride,
 323                       /*exec->array.inputs[i]->Enabled,*/
 324                       exec->array.legacy_array[i]->Enabled,
 325                       exec->array.inputs[i]->Ptr,
 326                       bufName);
 327
 328          if (bufName) {
 329             struct gl_buffer_object *buf = _mesa_lookup_bufferobj(ctx, bufName);
 330             GLubyte *p = ctx->Driver.MapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
 331                                             GL_READ_ONLY_ARB, buf);
 332             int offset = (int) exec->array.inputs[i]->Ptr;
 333             float *f = (float *) (p + offset);
 334             int *k = (int *) f;
 335             int i;
 336             int n = (count * stride) / 4;
 337             if (n > 32)
 338                n = 32;
 339             _mesa_printf("  Data at offset %d:\n", offset);
 340             for (i = 0; i < n; i++) {
 341                _mesa_printf("    float[%d] = 0x%08x %f\n", i, k[i], f[i]);
 342             }
 343             ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB, buf);
 344          }
 345       }
 346    }
 347 #endif
 348 }
 349
 350
 351 static void GLAPIENTRY
 352 vbo_exec_DrawRangeElements(GLenum mode,
 353                            GLuint start, GLuint end,
 354                            GLsizei count, GLenum type, const GLvoid *indices)
 355 {
 356    GET_CURRENT_CONTEXT(ctx);
 357    struct vbo_context *vbo = vbo_context(ctx);
 358    struct vbo_exec_context *exec = &vbo->exec;
 359    struct _mesa_index_buffer ib;
 360    struct _mesa_prim prim[1];
 361
 362    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count, type, indices ))
 363       return;
 364
 365    if (end >= ctx->Array.ArrayObj->_MaxElement) {
 366       /* the max element is out of bounds of one or more enabled arrays */
 367       _mesa_warning(ctx, "glDraw[Range]Elements(start %u, end %u, count %d, "
 368                     "type 0x%x) index=%u is out of bounds (max=%u)",
 369                     start, end, count, type, end);
 370       if (0)
 371          _mesa_print_arrays(ctx);
 372       return;
 373    }
 374
 375    FLUSH_CURRENT( ctx, 0 );
 376
 377    if (ctx->NewState)
 378       _mesa_update_state( ctx );
 379
 380    if (!vbo_validate_shaders(ctx)) {
 381       _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawRangeElements(bad shader)");
 382       return;
 383    }
 384
 385    bind_arrays( ctx );
 386
 387    if (ctx->NewState)
 388       _mesa_update_state( ctx );
 389
 390    ib.count = count;
 391    ib.type = type;
 392    ib.obj = ctx->Array.ElementArrayBufferObj;
 393    ib.ptr = indices;
 394
 395    prim[0].begin = 1;
 396    prim[0].end = 1;
 397    prim[0].weak = 0;
 398    prim[0].pad = 0;
 399    prim[0].mode = mode;
 400    prim[0].start = 0;
 401    prim[0].count = count;
 402    prim[0].indexed = 1;
 403
 404    /* Need to give special consideration to rendering a range of
 405     * indices starting somewhere above zero.  Typically the
 406     * application is issuing multiple DrawRangeElements() to draw
 407     * successive primitives layed out linearly in the vertex arrays.
 408     * Unless the vertex arrays are all in a VBO (or locked as with
 409     * CVA), the OpenGL semantics imply that we need to re-read or
 410     * re-upload the vertex data on each draw call.
 411     *
 412     * In the case of hardware tnl, we want to avoid starting the
 413     * upload at zero, as it will mean every draw call uploads an
 414     * increasing amount of not-used vertex data.  Worse - in the
 415     * software tnl module, all those vertices might be transformed and
 416     * lit but never rendered.
 417     *
 418     * If we just upload or transform the vertices in start..end,
 419     * however, the indices will be incorrect.
 420     *
 421     * At this level, we don't know exactly what the requirements of
 422     * the backend are going to be, though it will likely boil down to
 423     * either:
 424     *
 425     * 1) Do nothing, everything is in a VBO and is processed once
 426     *       only.
 427     *
 428     * 2) Adjust the indices and vertex arrays so that start becomes
 429     *    zero.
 430     *
 431     * Rather than doing anything here, I'll provide a helper function
 432     * for the latter case elsewhere.
 433     */
 434
 435    vbo->draw_prims( ctx, exec->array.inputs, prim, 1, &ib, start, end );
 436 }
 437
 438
 439 static void GLAPIENTRY
 440 vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices)
 441 {
 442    GET_CURRENT_CONTEXT(ctx);
 443    GLuint min_index = 0;
 444    GLuint max_index = 0;
 445
 446    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
 447       return;
 448
 449    if (!vbo_validate_shaders(ctx)) {
 450       _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawElements(bad shader)");
 451       return;
 452    }
 453
 454    if (ctx->Array.ElementArrayBufferObj->Name) {
 455       const GLvoid *map = ctx->Driver.MapBuffer(ctx,
 456                                                  GL_ELEMENT_ARRAY_BUFFER_ARB,
 457                                                  GL_READ_ONLY,
 458                                                  ctx->Array.ElementArrayBufferObj);
 459
 460       get_minmax_index(count, type, ADD_POINTERS(map, indices), &min_index, &max_index);
 461
 462       ctx->Driver.UnmapBuffer(ctx,
 463                               GL_ELEMENT_ARRAY_BUFFER_ARB,
 464                               ctx->Array.ElementArrayBufferObj);
 465    }
 466    else {
 467       get_minmax_index(count, type, indices, &min_index, &max_index);
 468    }
 469
 470    vbo_exec_DrawRangeElements(mode, min_index, max_index, count, type, indices);
 471 }
 472
 473
 474 /***********************************************************************
 475  * Initialization
 476  */
 477
 478 void vbo_exec_array_init( struct vbo_exec_context *exec )
 479 {
 480 #if 1
 481    exec->vtxfmt.DrawArrays = vbo_exec_DrawArrays;
 482    exec->vtxfmt.DrawElements = vbo_exec_DrawElements;
 483    exec->vtxfmt.DrawRangeElements = vbo_exec_DrawRangeElements;
 484 #else
 485    exec->vtxfmt.DrawArrays = _mesa_noop_DrawArrays;
 486    exec->vtxfmt.DrawElements = _mesa_noop_DrawElements;
 487    exec->vtxfmt.DrawRangeElements = _mesa_noop_DrawRangeElements;
 488 #endif
 489 }
 490
 491
 492 void vbo_exec_array_destroy( struct vbo_exec_context *exec )
 493 {
 494    /* nothing to do */
 495 }
 496
 497
 498 /* This API entrypoint is not ordinarily used */
 499 void GLAPIENTRY
 500 _mesa_DrawArrays(GLenum mode, GLint first, GLsizei count)
 501 {
 502    vbo_exec_DrawArrays(mode, first, count);
 503 }
 504
 505
 506 /* This API entrypoint is not ordinarily used */
 507 void GLAPIENTRY
 508 _mesa_DrawElements(GLenum mode, GLsizei count, GLenum type,
 509                    const GLvoid *indices)
 510 {
 511    vbo_exec_DrawElements(mode, count, type, indices);
 512 }
 513
 514
 515 /* This API entrypoint is not ordinarily used */
 516 void GLAPIENTRY
 517 _mesa_DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count,
 518                         GLenum type, const GLvoid *indices)
 519 {
 520    vbo_exec_DrawRangeElements(mode, start, end, count, type, indices);
 521 }