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 /* Compute min and max elements for drawelements calls.
  40  */
  41 static void get_minmax_index( GLuint count, GLuint type,
  42                               const GLvoid *indices,
  43                               GLuint *min_index,
  44                               GLuint *max_index)
  45 {
  46    GLuint i;
  47
  48    switch(type) {
  49    case GL_UNSIGNED_INT: {
  50       const GLuint *ui_indices = (const GLuint *)indices;
  51       GLuint max_ui = ui_indices[count-1];
  52       GLuint min_ui = ui_indices[0];
  53       for (i = 0; i < count; i++) {
  54          if (ui_indices[i] > max_ui) max_ui = ui_indices[i];
  55          if (ui_indices[i] < min_ui) min_ui = ui_indices[i];
  56       }
  57       *min_index = min_ui;
  58       *max_index = max_ui;
  59       break;
  60    }
  61    case GL_UNSIGNED_SHORT: {
  62       const GLushort *us_indices = (const GLushort *)indices;
  63       GLuint max_us = us_indices[count-1];
  64       GLuint min_us = us_indices[0];
  65       for (i = 0; i < count; i++) {
  66          if (us_indices[i] > max_us) max_us = us_indices[i];
  67          if (us_indices[i] < min_us) min_us = us_indices[i];
  68       }
  69       *min_index = min_us;
  70       *max_index = max_us;
  71       break;
  72    }
  73    case GL_UNSIGNED_BYTE: {
  74       const GLubyte *ub_indices = (const GLubyte *)indices;
  75       GLuint max_ub = ub_indices[count-1];
  76       GLuint min_ub = ub_indices[0];
  77       for (i = 0; i < count; i++) {
  78          if (ub_indices[i] > max_ub) max_ub = ub_indices[i];
  79          if (ub_indices[i] < min_ub) min_ub = ub_indices[i];
  80       }
  81       *min_index = min_ub;
  82       *max_index = max_ub;
  83       break;
  84    }
  85    default:
  86       assert(0);
  87       break;
  88    }
  89 }
  90
  91
  92 /* Just translate the arrayobj into a sane layout.
  93  */
  94 static void bind_array_obj( GLcontext *ctx )
  95 {
  96    struct vbo_context *vbo = vbo_context(ctx);
  97    struct vbo_exec_context *exec = &vbo->exec;
  98    struct gl_array_object *arrayObj = ctx->Array.ArrayObj;
  99    GLuint i;
 100
 101    /* TODO: Fix the ArrayObj struct to keep legacy arrays in an array
 102     * rather than as individual named arrays.  Then this function can
 103     * go away.
 104     */
 105    exec->array.legacy_array[VERT_ATTRIB_POS] = &arrayObj->Vertex;
 106    exec->array.legacy_array[VERT_ATTRIB_WEIGHT] = &vbo->legacy_currval[VERT_ATTRIB_WEIGHT];
 107    exec->array.legacy_array[VERT_ATTRIB_NORMAL] = &arrayObj->Normal;
 108    exec->array.legacy_array[VERT_ATTRIB_COLOR0] = &arrayObj->Color;
 109    exec->array.legacy_array[VERT_ATTRIB_COLOR1] = &arrayObj->SecondaryColor;
 110    exec->array.legacy_array[VERT_ATTRIB_FOG] = &arrayObj->FogCoord;
 111    exec->array.legacy_array[VERT_ATTRIB_COLOR_INDEX] = &arrayObj->Index;
 112    if (arrayObj->PointSize.Enabled) {
 113       /* this aliases COLOR_INDEX */
 114       exec->array.legacy_array[VERT_ATTRIB_POINT_SIZE] = &arrayObj->PointSize;
 115    }
 116    exec->array.legacy_array[VERT_ATTRIB_EDGEFLAG] = &arrayObj->EdgeFlag;
 117
 118    for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
 119       exec->array.legacy_array[VERT_ATTRIB_TEX0 + i] = &arrayObj->TexCoord[i];
 120
 121    for (i = 0; i < VERT_ATTRIB_MAX; i++)
 122       exec->array.generic_array[i] = &arrayObj->VertexAttrib[i];
 123
 124    exec->array.array_obj = arrayObj->Name;
 125 }
 126
 127 static void recalculate_input_bindings( GLcontext *ctx )
 128 {
 129    struct vbo_context *vbo = vbo_context(ctx);
 130    struct vbo_exec_context *exec = &vbo->exec;
 131    const struct gl_client_array **inputs = &exec->array.inputs[0];
 132    GLbitfield const_inputs = 0x0;
 133    GLuint i;
 134
 135    exec->array.program_mode = get_program_mode(ctx);
 136    exec->array.enabled_flags = ctx->Array.ArrayObj->_Enabled;
 137
 138    switch (exec->array.program_mode) {
 139    case VP_NONE:
 140       /* When no vertex program is active, we put the material values
 141        * into the generic slots.  This is the only situation where
 142        * material values are available as per-vertex attributes.
 143        */
 144       for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
 145          if (exec->array.legacy_array[i]->Enabled)
 146             inputs[i] = exec->array.legacy_array[i];
 147          else {
 148             inputs[i] = &vbo->legacy_currval[i];
 149             const_inputs |= 1 << i;
 150          }
 151       }
 152
 153       for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 154          inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->mat_currval[i];
 155          const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
 156       }
 157
 158       /* Could use just about anything, just to fill in the empty
 159        * slots:
 160        */
 161       for (i = MAT_ATTRIB_MAX; i < VERT_ATTRIB_MAX - VERT_ATTRIB_GENERIC0; i++) {
 162          inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];
 163          const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
 164       }
 165
 166       break;
 167    case VP_NV:
 168       /* NV_vertex_program - attribute arrays alias and override
 169        * conventional, legacy arrays.  No materials, and the generic
 170        * slots are vacant.
 171        */
 172       for (i = 0; i <= VERT_ATTRIB_TEX7; i++) {
 173          if (exec->array.generic_array[i]->Enabled)
 174             inputs[i] = exec->array.generic_array[i];
 175          else if (exec->array.legacy_array[i]->Enabled)
 176             inputs[i] = exec->array.legacy_array[i];
 177          else {
 178             inputs[i] = &vbo->legacy_currval[i];
 179             const_inputs |= 1 << i;
 180          }
 181       }
 182
 183       /* Could use just about anything, just to fill in the empty
 184        * slots:
 185        */
 186       for (i = VERT_ATTRIB_GENERIC0; i < VERT_ATTRIB_MAX; i++) {
 187          inputs[i] = &vbo->generic_currval[i - VERT_ATTRIB_GENERIC0];
 188          const_inputs |= 1 << i;
 189       }
 190
 191       break;
 192    case VP_ARB:
 193       /* ARB_vertex_program - Only the attribute zero (position) array
 194        * aliases and overrides the legacy position array.
 195        *
 196        * Otherwise, legacy attributes available in the legacy slots,
 197        * generic attributes in the generic slots and materials are not
 198        * available as per-vertex attributes.
 199        */
 200       if (exec->array.generic_array[0]->Enabled)
 201          inputs[0] = exec->array.generic_array[0];
 202       else if (exec->array.legacy_array[0]->Enabled)
 203          inputs[0] = exec->array.legacy_array[0];
 204       else {
 205          inputs[0] = &vbo->legacy_currval[0];
 206          const_inputs |= 1 << 0;
 207       }
 208
 209
 210       for (i = 1; i <= VERT_ATTRIB_TEX7; i++) {
 211          if (exec->array.legacy_array[i]->Enabled)
 212             inputs[i] = exec->array.legacy_array[i];
 213          else {
 214             inputs[i] = &vbo->legacy_currval[i];
 215             const_inputs |= 1 << i;
 216          }
 217       }
 218
 219       for (i = 0; i < 16; i++) {
 220          if (exec->array.generic_array[i]->Enabled)
 221             inputs[VERT_ATTRIB_GENERIC0 + i] = exec->array.generic_array[i];
 222          else {
 223             inputs[VERT_ATTRIB_GENERIC0 + i] = &vbo->generic_currval[i];
 224             const_inputs |= 1 << (VERT_ATTRIB_GENERIC0 + i);
 225          }
 226
 227       }
 228       break;
 229    }
 230
 231    _mesa_set_varying_vp_inputs( ctx, ~const_inputs );
 232 }
 233
 234 static void bind_arrays( GLcontext *ctx )
 235 {
 236 #if 0
 237    if (ctx->Array.ArrayObj.Name != exec->array.array_obj) {
 238       bind_array_obj(ctx);
 239       recalculate_input_bindings(ctx);
 240    }
 241    else if (exec->array.program_mode != get_program_mode(ctx) ||
 242             exec->array.enabled_flags != ctx->Array.ArrayObj->_Enabled) {
 243
 244       recalculate_input_bindings(ctx);
 245    }
 246 #else
 247    bind_array_obj(ctx);
 248    recalculate_input_bindings(ctx);
 249 #endif
 250 }
 251
 252
 253
 254 /***********************************************************************
 255  * API functions.
 256  */
 257
 258 static void GLAPIENTRY
 259 vbo_exec_DrawArrays(GLenum mode, GLint start, GLsizei count)
 260 {
 261    GET_CURRENT_CONTEXT(ctx);
 262    struct vbo_context *vbo = vbo_context(ctx);
 263    struct vbo_exec_context *exec = &vbo->exec;
 264    struct _mesa_prim prim[1];
 265
 266    if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
 267       return;
 268
 269    FLUSH_CURRENT( ctx, 0 );
 270
 271    if (ctx->NewState)
 272       _mesa_update_state( ctx );
 273
 274    if (!vbo_validate_shaders(ctx)) {
 275       _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawArrays(bad shader)");
 276       return;
 277    }
 278
 279    bind_arrays( ctx );
 280
 281    /* Again...
 282     */
 283    if (ctx->NewState)
 284       _mesa_update_state( ctx );
 285
 286    prim[0].begin = 1;
 287    prim[0].end = 1;
 288    prim[0].weak = 0;
 289    prim[0].pad = 0;
 290    prim[0].mode = mode;
 291    prim[0].start = start;
 292    prim[0].count = count;
 293    prim[0].indexed = 0;
 294
 295    vbo->draw_prims( ctx, exec->array.inputs, prim, 1, NULL, start, start + count - 1 );
 296
 297 #if 0
 298    {
 299       int i;
 300
 301       _mesa_printf("vbo_exec_DrawArrays(mode 0x%x, start %d, count %d):\n",
 302                    mode, start, count);
 303
 304       for (i = 0; i < 32; i++) {
 305          GLuint bufName = exec->array.inputs[i]->BufferObj->Name;
 306          GLint stride = exec->array.inputs[i]->Stride;
 307          _mesa_printf("attr %2d: size %d stride %d  enabled %d  "
 308                       "ptr %p  Bufobj %u\n",
 309                       i,
 310                       exec->array.inputs[i]->Size,
 311                       stride,
 312                       /*exec->array.inputs[i]->Enabled,*/
 313                       exec->array.legacy_array[i]->Enabled,
 314                       exec->array.inputs[i]->Ptr,
 315                       bufName);
 316
 317          if (bufName) {
 318             struct gl_buffer_object *buf = _mesa_lookup_bufferobj(ctx, bufName);
 319             GLubyte *p = ctx->Driver.MapBuffer(ctx, GL_ARRAY_BUFFER_ARB,
 320                                             GL_READ_ONLY_ARB, buf);
 321             int offset = (int) exec->array.inputs[i]->Ptr;
 322             float *f = (float *) (p + offset);
 323             int *k = (int *) f;
 324             int i;
 325             int n = (count * stride) / 4;
 326             if (n > 32)
 327                n = 32;
 328             _mesa_printf("  Data at offset %d:\n", offset);
 329             for (i = 0; i < n; i++) {
 330                _mesa_printf("    float[%d] = 0x%08x %f\n", i, k[i], f[i]);
 331             }
 332             ctx->Driver.UnmapBuffer(ctx, GL_ARRAY_BUFFER_ARB, buf);
 333          }
 334       }
 335    }
 336 #endif
 337 }
 338
 339
 340
 341 static void GLAPIENTRY
 342 vbo_exec_DrawRangeElements(GLenum mode,
 343                            GLuint start, GLuint end,
 344                            GLsizei count, GLenum type, const GLvoid *indices)
 345 {
 346    GET_CURRENT_CONTEXT(ctx);
 347    struct vbo_context *vbo = vbo_context(ctx);
 348    struct vbo_exec_context *exec = &vbo->exec;
 349    struct _mesa_index_buffer ib;
 350    struct _mesa_prim prim[1];
 351
 352    if (!_mesa_validate_DrawRangeElements( ctx, mode, start, end, count, type, indices ))
 353       return;
 354
 355    if (end >= ctx->Array.ArrayObj->_MaxElement) {
 356       /* the max element is out of bounds of one or more enabled arrays */
 357       _mesa_warning(ctx, "glDraw[Range]Elements() index=%u is "
 358                     "out of bounds (max=%u)", end,
 359                     ctx->Array.ArrayObj->_MaxElement);
 360       return;
 361    }
 362
 363    FLUSH_CURRENT( ctx, 0 );
 364
 365    if (ctx->NewState)
 366       _mesa_update_state( ctx );
 367
 368    if (!vbo_validate_shaders(ctx)) {
 369       _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawRangeElements(bad shader)");
 370       return;
 371    }
 372
 373    bind_arrays( ctx );
 374
 375    if (ctx->NewState)
 376       _mesa_update_state( ctx );
 377
 378    ib.count = count;
 379    ib.type = type;
 380    ib.obj = ctx->Array.ElementArrayBufferObj;
 381    ib.ptr = indices;
 382
 383    prim[0].begin = 1;
 384    prim[0].end = 1;
 385    prim[0].weak = 0;
 386    prim[0].pad = 0;
 387    prim[0].mode = mode;
 388    prim[0].start = 0;
 389    prim[0].count = count;
 390    prim[0].indexed = 1;
 391
 392    /* Need to give special consideration to rendering a range of
 393     * indices starting somewhere above zero.  Typically the
 394     * application is issuing multiple DrawRangeElements() to draw
 395     * successive primitives layed out linearly in the vertex arrays.
 396     * Unless the vertex arrays are all in a VBO (or locked as with
 397     * CVA), the OpenGL semantics imply that we need to re-read or
 398     * re-upload the vertex data on each draw call.
 399     *
 400     * In the case of hardware tnl, we want to avoid starting the
 401     * upload at zero, as it will mean every draw call uploads an
 402     * increasing amount of not-used vertex data.  Worse - in the
 403     * software tnl module, all those vertices might be transformed and
 404     * lit but never rendered.
 405     *
 406     * If we just upload or transform the vertices in start..end,
 407     * however, the indices will be incorrect.
 408     *
 409     * At this level, we don't know exactly what the requirements of
 410     * the backend are going to be, though it will likely boil down to
 411     * either:
 412     *
 413     * 1) Do nothing, everything is in a VBO and is processed once
 414     *       only.
 415     *
 416     * 2) Adjust the indices and vertex arrays so that start becomes
 417     *    zero.
 418     *
 419     * Rather than doing anything here, I'll provide a helper function
 420     * for the latter case elsewhere.
 421     */
 422
 423    vbo->draw_prims( ctx, exec->array.inputs, prim, 1, &ib, start, end );
 424 }
 425
 426 static void GLAPIENTRY
 427 vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices)
 428 {
 429    GET_CURRENT_CONTEXT(ctx);
 430    GLuint min_index = 0;
 431    GLuint max_index = 0;
 432
 433    if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
 434       return;
 435
 436    if (!vbo_validate_shaders(ctx)) {
 437       _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawElements(bad shader)");
 438       return;
 439    }
 440
 441    if (ctx->Array.ElementArrayBufferObj->Name) {
 442       const GLvoid *map = ctx->Driver.MapBuffer(ctx,
 443                                                  GL_ELEMENT_ARRAY_BUFFER_ARB,
 444                                                  GL_READ_ONLY,
 445                                                  ctx->Array.ElementArrayBufferObj);
 446
 447       get_minmax_index(count, type, ADD_POINTERS(map, indices), &min_index, &max_index);
 448
 449       ctx->Driver.UnmapBuffer(ctx,
 450                               GL_ELEMENT_ARRAY_BUFFER_ARB,
 451                               ctx->Array.ElementArrayBufferObj);
 452    }
 453    else {
 454       get_minmax_index(count, type, indices, &min_index, &max_index);
 455    }
 456
 457    vbo_exec_DrawRangeElements(mode, min_index, max_index, count, type, indices);
 458 }
 459
 460
 461 /***********************************************************************
 462  * Initialization
 463  */
 464
 465
 466
 467
 468 void vbo_exec_array_init( struct vbo_exec_context *exec )
 469 {
 470 #if 1
 471    exec->vtxfmt.DrawArrays = vbo_exec_DrawArrays;
 472    exec->vtxfmt.DrawElements = vbo_exec_DrawElements;
 473    exec->vtxfmt.DrawRangeElements = vbo_exec_DrawRangeElements;
 474 #else
 475    exec->vtxfmt.DrawArrays = _mesa_noop_DrawArrays;
 476    exec->vtxfmt.DrawElements = _mesa_noop_DrawElements;
 477    exec->vtxfmt.DrawRangeElements = _mesa_noop_DrawRangeElements;
 478 #endif
 479 }
 480
 481
 482 void vbo_exec_array_destroy( struct vbo_exec_context *exec )
 483 {
 484    /* nothing to do */
 485 }
 486
 487
 488 /* This API entrypoint is not ordinarily used */
 489 void GLAPIENTRY
 490 _mesa_DrawArrays(GLenum mode, GLint first, GLsizei count)
 491 {
 492    vbo_exec_DrawArrays(mode, first, count);
 493 }
 494
 495
 496 /* This API entrypoint is not ordinarily used */
 497 void GLAPIENTRY
 498 _mesa_DrawElements(GLenum mode, GLsizei count, GLenum type,
 499                    const GLvoid *indices)
 500 {
 501    vbo_exec_DrawElements(mode, count, type, indices);
 502 }
 503
 504
 505 /* This API entrypoint is not ordinarily used */
 506 void GLAPIENTRY
 507 _mesa_DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count,
 508                         GLenum type, const GLvoid *indices)
 509 {
 510    vbo_exec_DrawRangeElements(mode, start, end, count, type, indices);
 511 }