src/mesa/drivers/dri/i915tex/intel_tris.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 "glheader.h"
  29 #include "context.h"
  30 #include "macros.h"
  31 #include "enums.h"
  32 #include "texobj.h"
  33 #include "state.h"
  34 #include "dd.h"
  35
  36 #include "swrast/swrast.h"
  37 #include "swrast_setup/swrast_setup.h"
  38 #include "tnl/t_context.h"
  39 #include "tnl/t_pipeline.h"
  40 #include "tnl/t_vertex.h"
  41
  42 #include "intel_screen.h"
  43 #include "intel_context.h"
  44 #include "intel_tris.h"
  45 #include "intel_batchbuffer.h"
  46 #include "intel_buffers.h"
  47 #include "intel_reg.h"
  48 #include "intel_span.h"
  49 #include "intel_tex.h"
  50
  51 static void intelRenderPrimitive(GLcontext * ctx, GLenum prim);
  52 static void intelRasterPrimitive(GLcontext * ctx, GLenum rprim,
  53                                  GLuint hwprim);
  54
  55 /*
  56  */
  57 static void
  58 intel_flush_inline_primitive(struct intel_context *intel)
  59 {
  60    GLuint used = intel->batch->ptr - intel->prim.start_ptr;
  61
  62    assert(intel->prim.primitive != ~0);
  63
  64 /*    _mesa_printf("/\n"); */
  65
  66    if (used < 8)
  67       goto do_discard;
  68
  69    *(int *) intel->prim.start_ptr = (_3DPRIMITIVE |
  70                                      intel->prim.primitive | (used / 4 - 2));
  71
  72    goto finished;
  73
  74  do_discard:
  75    intel->batch->ptr -= used;
  76
  77  finished:
  78    intel->prim.primitive = ~0;
  79    intel->prim.start_ptr = 0;
  80    intel->prim.flush = 0;
  81 }
  82
  83
  84 /* Emit a primitive referencing vertices in a vertex buffer.
  85  */
  86 void
  87 intelStartInlinePrimitive(struct intel_context *intel,
  88                           GLuint prim, GLuint batch_flags)
  89 {
  90    BATCH_LOCALS;
  91
  92    intel->vtbl.emit_state(intel);
  93
  94    /* Need to make sure at the very least that we don't wrap
  95     * batchbuffers in BEGIN_BATCH below, otherwise the primitive will
  96     * be emitted to a batchbuffer missing the required full-state
  97     * preamble.
  98     */
  99    if (intel_batchbuffer_space(intel->batch) < 100) {
 100       intel_batchbuffer_flush(intel->batch);
 101       intel->vtbl.emit_state(intel);
 102    }
 103
 104 /*    _mesa_printf("%s *", __progname); */
 105
 106    intel_wait_flips(intel, batch_flags);
 107
 108    /* Emit a slot which will be filled with the inline primitive
 109     * command later.
 110     */
 111    BEGIN_BATCH(2, batch_flags);
 112    OUT_BATCH(0);
 113
 114    intel->prim.start_ptr = intel->batch->ptr;
 115    intel->prim.primitive = prim;
 116    intel->prim.flush = intel_flush_inline_primitive;
 117
 118    OUT_BATCH(0);
 119    ADVANCE_BATCH();
 120
 121 /*    _mesa_printf(">"); */
 122 }
 123
 124
 125 void
 126 intelWrapInlinePrimitive(struct intel_context *intel)
 127 {
 128    GLuint prim = intel->prim.primitive;
 129    GLuint batchflags = intel->batch->flags;
 130
 131    intel_flush_inline_primitive(intel);
 132    intel_batchbuffer_flush(intel->batch);
 133    intelStartInlinePrimitive(intel, prim, batchflags);  /* ??? */
 134 }
 135
 136 GLuint *
 137 intelExtendInlinePrimitive(struct intel_context *intel, GLuint dwords)
 138 {
 139    GLuint sz = dwords * sizeof(GLuint);
 140    GLuint *ptr;
 141
 142    assert(intel->prim.flush == intel_flush_inline_primitive);
 143
 144    if (intel_batchbuffer_space(intel->batch) < sz)
 145       intelWrapInlinePrimitive(intel);
 146
 147 /*    _mesa_printf("."); */
 148
 149    intel->vtbl.assert_not_dirty(intel);
 150
 151    ptr = (GLuint *) intel->batch->ptr;
 152    intel->batch->ptr += sz;
 153
 154    return ptr;
 155 }
 156
 157
 158
 159 /***********************************************************************
 160  *                    Emit primitives as inline vertices               *
 161  ***********************************************************************/
 162
 163 #ifdef __i386__
 164 #define COPY_DWORDS( j, vb, vertsize, v )                       \
 165 do {                                                            \
 166    int __tmp;                                                   \
 167    __asm__ __volatile__( "rep ; movsl"                          \
 168                          : "=%c" (j), "=D" (vb), "=S" (__tmp)   \
 169                          : "0" (vertsize),                      \
 170                          "D" ((long)vb),                        \
 171                          "S" ((long)v) );                       \
 172 } while (0)
 173 #else
 174 #define COPY_DWORDS( j, vb, vertsize, v )       \
 175 do {                                            \
 176    for ( j = 0 ; j < vertsize ; j++ ) {         \
 177       vb[j] = ((GLuint *)v)[j];                 \
 178    }                                            \
 179    vb += vertsize;                              \
 180 } while (0)
 181 #endif
 182
 183 static void
 184 intel_draw_quad(struct intel_context *intel,
 185                 intelVertexPtr v0,
 186                 intelVertexPtr v1, intelVertexPtr v2, intelVertexPtr v3)
 187 {
 188    GLuint vertsize = intel->vertex_size;
 189    GLuint *vb = intelExtendInlinePrimitive(intel, 6 * vertsize);
 190    int j;
 191
 192    COPY_DWORDS(j, vb, vertsize, v0);
 193    COPY_DWORDS(j, vb, vertsize, v1);
 194
 195    /* If smooth shading, draw like a trifan which gives better
 196     * rasterization.  Otherwise draw as two triangles with provoking
 197     * vertex in third position as required for flat shading.
 198     */
 199    if (intel->ctx.Light.ShadeModel == GL_FLAT) {
 200       COPY_DWORDS(j, vb, vertsize, v3);
 201       COPY_DWORDS(j, vb, vertsize, v1);
 202    }
 203    else {
 204       COPY_DWORDS(j, vb, vertsize, v2);
 205       COPY_DWORDS(j, vb, vertsize, v0);
 206    }
 207
 208    COPY_DWORDS(j, vb, vertsize, v2);
 209    COPY_DWORDS(j, vb, vertsize, v3);
 210 }
 211
 212 static void
 213 intel_draw_triangle(struct intel_context *intel,
 214                     intelVertexPtr v0, intelVertexPtr v1, intelVertexPtr v2)
 215 {
 216    GLuint vertsize = intel->vertex_size;
 217    GLuint *vb = intelExtendInlinePrimitive(intel, 3 * vertsize);
 218    int j;
 219
 220    COPY_DWORDS(j, vb, vertsize, v0);
 221    COPY_DWORDS(j, vb, vertsize, v1);
 222    COPY_DWORDS(j, vb, vertsize, v2);
 223 }
 224
 225
 226 static void
 227 intel_draw_line(struct intel_context *intel,
 228                 intelVertexPtr v0, intelVertexPtr v1)
 229 {
 230    GLuint vertsize = intel->vertex_size;
 231    GLuint *vb = intelExtendInlinePrimitive(intel, 2 * vertsize);
 232    int j;
 233
 234    COPY_DWORDS(j, vb, vertsize, v0);
 235    COPY_DWORDS(j, vb, vertsize, v1);
 236 }
 237
 238
 239 static void
 240 intel_draw_point(struct intel_context *intel, intelVertexPtr v0)
 241 {
 242    GLuint vertsize = intel->vertex_size;
 243    GLuint *vb = intelExtendInlinePrimitive(intel, vertsize);
 244    int j;
 245
 246    /* Adjust for sub pixel position -- still required for conform. */
 247    *(float *) &vb[0] = v0->v.x - 0.125;
 248    *(float *) &vb[1] = v0->v.y - 0.125;
 249    for (j = 2; j < vertsize; j++)
 250       vb[j] = v0->ui[j];
 251 }
 252
 253
 254
 255 /***********************************************************************
 256  *                Fixup for ARB_point_parameters                       *
 257  ***********************************************************************/
 258
 259 /* Currently not working - VERT_ATTRIB_POINTSIZE isn't correctly
 260  * represented in the fragment program InputsRead field.
 261  */
 262 static void
 263 intel_atten_point(struct intel_context *intel, intelVertexPtr v0)
 264 {
 265    GLcontext *ctx = &intel->ctx;
 266    GLfloat psz[4], col[4], restore_psz, restore_alpha;
 267
 268    _tnl_get_attr(ctx, v0, _TNL_ATTRIB_POINTSIZE, psz);
 269    _tnl_get_attr(ctx, v0, _TNL_ATTRIB_COLOR0, col);
 270
 271    restore_psz = psz[0];
 272    restore_alpha = col[3];
 273
 274    if (psz[0] >= ctx->Point.Threshold) {
 275       psz[0] = MIN2(psz[0], ctx->Point.MaxSize);
 276    }
 277    else {
 278       GLfloat dsize = psz[0] / ctx->Point.Threshold;
 279       psz[0] = MAX2(ctx->Point.Threshold, ctx->Point.MinSize);
 280       col[3] *= dsize * dsize;
 281    }
 282
 283    if (psz[0] < 1.0)
 284       psz[0] = 1.0;
 285
 286    if (restore_psz != psz[0] || restore_alpha != col[3]) {
 287       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_POINTSIZE, psz);
 288       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_COLOR0, col);
 289
 290       intel_draw_point(intel, v0);
 291
 292       psz[0] = restore_psz;
 293       col[3] = restore_alpha;
 294
 295       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_POINTSIZE, psz);
 296       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_COLOR0, col);
 297    }
 298    else
 299       intel_draw_point(intel, v0);
 300 }
 301
 302
 303
 304
 305
 306 /***********************************************************************
 307  *                Fixup for I915 WPOS texture coordinate                *
 308  ***********************************************************************/
 309
 310
 311
 312 static void
 313 intel_wpos_triangle(struct intel_context *intel,
 314                     intelVertexPtr v0, intelVertexPtr v1, intelVertexPtr v2)
 315 {
 316    GLuint offset = intel->wpos_offset;
 317    GLuint size = intel->wpos_size;
 318
 319    __memcpy(((char *) v0) + offset, v0, size);
 320    __memcpy(((char *) v1) + offset, v1, size);
 321    __memcpy(((char *) v2) + offset, v2, size);
 322
 323    intel_draw_triangle(intel, v0, v1, v2);
 324 }
 325
 326
 327 static void
 328 intel_wpos_line(struct intel_context *intel,
 329                 intelVertexPtr v0, intelVertexPtr v1)
 330 {
 331    GLuint offset = intel->wpos_offset;
 332    GLuint size = intel->wpos_size;
 333
 334    __memcpy(((char *) v0) + offset, v0, size);
 335    __memcpy(((char *) v1) + offset, v1, size);
 336
 337    intel_draw_line(intel, v0, v1);
 338 }
 339
 340
 341 static void
 342 intel_wpos_point(struct intel_context *intel, intelVertexPtr v0)
 343 {
 344    GLuint offset = intel->wpos_offset;
 345    GLuint size = intel->wpos_size;
 346
 347    __memcpy(((char *) v0) + offset, v0, size);
 348
 349    intel_draw_point(intel, v0);
 350 }
 351
 352
 353
 354
 355
 356
 357 /***********************************************************************
 358  *          Macros for t_dd_tritmp.h to draw basic primitives          *
 359  ***********************************************************************/
 360
 361 #define TRI( a, b, c )                          \
 362 do {                                            \
 363    if (DO_FALLBACK)                             \
 364       intel->draw_tri( intel, a, b, c );        \
 365    else                                         \
 366       intel_draw_triangle( intel, a, b, c );    \
 367 } while (0)
 368
 369 #define QUAD( a, b, c, d )                      \
 370 do {                                            \
 371    if (DO_FALLBACK) {                           \
 372       intel->draw_tri( intel, a, b, d );        \
 373       intel->draw_tri( intel, b, c, d );        \
 374    } else                                       \
 375       intel_draw_quad( intel, a, b, c, d );     \
 376 } while (0)
 377
 378 #define LINE( v0, v1 )                          \
 379 do {                                            \
 380    if (DO_FALLBACK)                             \
 381       intel->draw_line( intel, v0, v1 );        \
 382    else                                         \
 383       intel_draw_line( intel, v0, v1 );         \
 384 } while (0)
 385
 386 #define POINT( v0 )                             \
 387 do {                                            \
 388    if (DO_FALLBACK)                             \
 389       intel->draw_point( intel, v0 );           \
 390    else                                         \
 391       intel_draw_point( intel, v0 );            \
 392 } while (0)
 393
 394
 395 /***********************************************************************
 396  *              Build render functions from dd templates               *
 397  ***********************************************************************/
 398
 399 #define INTEL_OFFSET_BIT        0x01
 400 #define INTEL_TWOSIDE_BIT       0x02
 401 #define INTEL_UNFILLED_BIT      0x04
 402 #define INTEL_FALLBACK_BIT      0x08
 403 #define INTEL_MAX_TRIFUNC       0x10
 404
 405
 406 static struct
 407 {
 408    tnl_points_func points;
 409    tnl_line_func line;
 410    tnl_triangle_func triangle;
 411    tnl_quad_func quad;
 412 } rast_tab[INTEL_MAX_TRIFUNC];
 413
 414
 415 #define DO_FALLBACK (IND & INTEL_FALLBACK_BIT)
 416 #define DO_OFFSET   (IND & INTEL_OFFSET_BIT)
 417 #define DO_UNFILLED (IND & INTEL_UNFILLED_BIT)
 418 #define DO_TWOSIDE  (IND & INTEL_TWOSIDE_BIT)
 419 #define DO_FLAT      0
 420 #define DO_TRI       1
 421 #define DO_QUAD      1
 422 #define DO_LINE      1
 423 #define DO_POINTS    1
 424 #define DO_FULL_QUAD 1
 425
 426 #define HAVE_RGBA         1
 427 #define HAVE_SPEC         1
 428 #define HAVE_BACK_COLORS  0
 429 #define HAVE_HW_FLATSHADE 1
 430 #define VERTEX            intelVertex
 431 #define TAB               rast_tab
 432
 433 /* Only used to pull back colors into vertices (ie, we know color is
 434  * floating point).
 435  */
 436 #define INTEL_COLOR( dst, src )                         \
 437 do {                                                    \
 438    UNCLAMPED_FLOAT_TO_UBYTE((dst)[0], (src)[2]);        \
 439    UNCLAMPED_FLOAT_TO_UBYTE((dst)[1], (src)[1]);        \
 440    UNCLAMPED_FLOAT_TO_UBYTE((dst)[2], (src)[0]);        \
 441    UNCLAMPED_FLOAT_TO_UBYTE((dst)[3], (src)[3]);        \
 442 } while (0)
 443
 444 #define INTEL_SPEC( dst, src )                          \
 445 do {                                                    \
 446    UNCLAMPED_FLOAT_TO_UBYTE((dst)[0], (src)[2]);        \
 447    UNCLAMPED_FLOAT_TO_UBYTE((dst)[1], (src)[1]);        \
 448    UNCLAMPED_FLOAT_TO_UBYTE((dst)[2], (src)[0]);        \
 449 } while (0)
 450
 451
 452 #define DEPTH_SCALE intel->polygon_offset_scale
 453 #define UNFILLED_TRI unfilled_tri
 454 #define UNFILLED_QUAD unfilled_quad
 455 #define VERT_X(_v) _v->v.x
 456 #define VERT_Y(_v) _v->v.y
 457 #define VERT_Z(_v) _v->v.z
 458 #define AREA_IS_CCW( a ) (a > 0)
 459 #define GET_VERTEX(e) (intel->verts + (e * intel->vertex_size * sizeof(GLuint)))
 460
 461 #define VERT_SET_RGBA( v, c )    if (coloroffset) INTEL_COLOR( v->ub4[coloroffset], c )
 462 #define VERT_COPY_RGBA( v0, v1 ) if (coloroffset) v0->ui[coloroffset] = v1->ui[coloroffset]
 463 #define VERT_SAVE_RGBA( idx )    if (coloroffset) color[idx] = v[idx]->ui[coloroffset]
 464 #define VERT_RESTORE_RGBA( idx ) if (coloroffset) v[idx]->ui[coloroffset] = color[idx]
 465
 466 #define VERT_SET_SPEC( v, c )    if (specoffset) INTEL_SPEC( v->ub4[specoffset], c )
 467 #define VERT_COPY_SPEC( v0, v1 ) if (specoffset) COPY_3V(v0->ub4[specoffset], v1->ub4[specoffset])
 468 #define VERT_SAVE_SPEC( idx )    if (specoffset) spec[idx] = v[idx]->ui[specoffset]
 469 #define VERT_RESTORE_SPEC( idx ) if (specoffset) v[idx]->ui[specoffset] = spec[idx]
 470
 471 #define LOCAL_VARS(n)                                                   \
 472    struct intel_context *intel = intel_context(ctx);                            \
 473    GLuint color[n], spec[n];                                            \
 474    GLuint coloroffset = intel->coloroffset;             \
 475    GLboolean specoffset = intel->specoffset;                    \
 476    (void) color; (void) spec; (void) coloroffset; (void) specoffset;
 477
 478
 479 /***********************************************************************
 480  *                Helpers for rendering unfilled primitives            *
 481  ***********************************************************************/
 482
 483 static const GLuint hw_prim[GL_POLYGON + 1] = {
 484    PRIM3D_POINTLIST,
 485    PRIM3D_LINELIST,
 486    PRIM3D_LINELIST,
 487    PRIM3D_LINELIST,
 488    PRIM3D_TRILIST,
 489    PRIM3D_TRILIST,
 490    PRIM3D_TRILIST,
 491    PRIM3D_TRILIST,
 492    PRIM3D_TRILIST,
 493    PRIM3D_TRILIST
 494 };
 495
 496 #define RASTERIZE(x) intelRasterPrimitive( ctx, x, hw_prim[x] )
 497 #define RENDER_PRIMITIVE intel->render_primitive
 498 #define TAG(x) x
 499 #define IND INTEL_FALLBACK_BIT
 500 #include "tnl_dd/t_dd_unfilled.h"
 501 #undef IND
 502
 503 /***********************************************************************
 504  *                      Generate GL render functions                   *
 505  ***********************************************************************/
 506
 507 #define IND (0)
 508 #define TAG(x) x
 509 #include "tnl_dd/t_dd_tritmp.h"
 510
 511 #define IND (INTEL_OFFSET_BIT)
 512 #define TAG(x) x##_offset
 513 #include "tnl_dd/t_dd_tritmp.h"
 514
 515 #define IND (INTEL_TWOSIDE_BIT)
 516 #define TAG(x) x##_twoside
 517 #include "tnl_dd/t_dd_tritmp.h"
 518
 519 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT)
 520 #define TAG(x) x##_twoside_offset
 521 #include "tnl_dd/t_dd_tritmp.h"
 522
 523 #define IND (INTEL_UNFILLED_BIT)
 524 #define TAG(x) x##_unfilled
 525 #include "tnl_dd/t_dd_tritmp.h"
 526
 527 #define IND (INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT)
 528 #define TAG(x) x##_offset_unfilled
 529 #include "tnl_dd/t_dd_tritmp.h"
 530
 531 #define IND (INTEL_TWOSIDE_BIT|INTEL_UNFILLED_BIT)
 532 #define TAG(x) x##_twoside_unfilled
 533 #include "tnl_dd/t_dd_tritmp.h"
 534
 535 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT)
 536 #define TAG(x) x##_twoside_offset_unfilled
 537 #include "tnl_dd/t_dd_tritmp.h"
 538
 539 #define IND (INTEL_FALLBACK_BIT)
 540 #define TAG(x) x##_fallback
 541 #include "tnl_dd/t_dd_tritmp.h"
 542
 543 #define IND (INTEL_OFFSET_BIT|INTEL_FALLBACK_BIT)
 544 #define TAG(x) x##_offset_fallback
 545 #include "tnl_dd/t_dd_tritmp.h"
 546
 547 #define IND (INTEL_TWOSIDE_BIT|INTEL_FALLBACK_BIT)
 548 #define TAG(x) x##_twoside_fallback
 549 #include "tnl_dd/t_dd_tritmp.h"
 550
 551 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT|INTEL_FALLBACK_BIT)
 552 #define TAG(x) x##_twoside_offset_fallback
 553 #include "tnl_dd/t_dd_tritmp.h"
 554
 555 #define IND (INTEL_UNFILLED_BIT|INTEL_FALLBACK_BIT)
 556 #define TAG(x) x##_unfilled_fallback
 557 #include "tnl_dd/t_dd_tritmp.h"
 558
 559 #define IND (INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT|INTEL_FALLBACK_BIT)
 560 #define TAG(x) x##_offset_unfilled_fallback
 561 #include "tnl_dd/t_dd_tritmp.h"
 562
 563 #define IND (INTEL_TWOSIDE_BIT|INTEL_UNFILLED_BIT|INTEL_FALLBACK_BIT)
 564 #define TAG(x) x##_twoside_unfilled_fallback
 565 #include "tnl_dd/t_dd_tritmp.h"
 566
 567 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT| \
 568              INTEL_FALLBACK_BIT)
 569 #define TAG(x) x##_twoside_offset_unfilled_fallback
 570 #include "tnl_dd/t_dd_tritmp.h"
 571
 572
 573 static void
 574 init_rast_tab(void)
 575 {
 576    init();
 577    init_offset();
 578    init_twoside();
 579    init_twoside_offset();
 580    init_unfilled();
 581    init_offset_unfilled();
 582    init_twoside_unfilled();
 583    init_twoside_offset_unfilled();
 584    init_fallback();
 585    init_offset_fallback();
 586    init_twoside_fallback();
 587    init_twoside_offset_fallback();
 588    init_unfilled_fallback();
 589    init_offset_unfilled_fallback();
 590    init_twoside_unfilled_fallback();
 591    init_twoside_offset_unfilled_fallback();
 592 }
 593
 594
 595 /***********************************************************************
 596  *                    Rasterization fallback helpers                   *
 597  ***********************************************************************/
 598
 599
 600 /* This code is hit only when a mix of accelerated and unaccelerated
 601  * primitives are being drawn, and only for the unaccelerated
 602  * primitives.
 603  */
 604 static void
 605 intel_fallback_tri(struct intel_context *intel,
 606                    intelVertex * v0, intelVertex * v1, intelVertex * v2)
 607 {
 608    GLcontext *ctx = &intel->ctx;
 609    SWvertex v[3];
 610
 611    if (0)
 612       fprintf(stderr, "\n%s\n", __FUNCTION__);
 613
 614    INTEL_FIREVERTICES(intel);
 615
 616    _swsetup_Translate(ctx, v0, &v[0]);
 617    _swsetup_Translate(ctx, v1, &v[1]);
 618    _swsetup_Translate(ctx, v2, &v[2]);
 619    intelSpanRenderStart(ctx);
 620    _swrast_Triangle(ctx, &v[0], &v[1], &v[2]);
 621    intelSpanRenderFinish(ctx);
 622 }
 623
 624
 625 static void
 626 intel_fallback_line(struct intel_context *intel,
 627                     intelVertex * v0, intelVertex * v1)
 628 {
 629    GLcontext *ctx = &intel->ctx;
 630    SWvertex v[2];
 631
 632    if (0)
 633       fprintf(stderr, "\n%s\n", __FUNCTION__);
 634
 635    INTEL_FIREVERTICES(intel);
 636
 637    _swsetup_Translate(ctx, v0, &v[0]);
 638    _swsetup_Translate(ctx, v1, &v[1]);
 639    intelSpanRenderStart(ctx);
 640    _swrast_Line(ctx, &v[0], &v[1]);
 641    intelSpanRenderFinish(ctx);
 642 }
 643
 644 static void
 645 intel_fallback_point(struct intel_context *intel,
 646                      intelVertex * v0)
 647 {
 648    GLcontext *ctx = &intel->ctx;
 649    SWvertex v[1];
 650
 651    if (0)
 652       fprintf(stderr, "\n%s\n", __FUNCTION__);
 653
 654    INTEL_FIREVERTICES(intel);
 655
 656    _swsetup_Translate(ctx, v0, &v[0]);
 657    intelSpanRenderStart(ctx);
 658    _swrast_Point(ctx, &v[0]);
 659    intelSpanRenderFinish(ctx);
 660 }
 661
 662
 663 /**********************************************************************/
 664 /*               Render unclipped begin/end objects                   */
 665 /**********************************************************************/
 666
 667 #define IND 0
 668 #define V(x) (intelVertex *)(vertptr + ((x)*vertsize*sizeof(GLuint)))
 669 #define RENDER_POINTS( start, count )   \
 670    for ( ; start < count ; start++) POINT( V(ELT(start)) );
 671 #define RENDER_LINE( v0, v1 )         LINE( V(v0), V(v1) )
 672 #define RENDER_TRI(  v0, v1, v2 )     TRI(  V(v0), V(v1), V(v2) )
 673 #define RENDER_QUAD( v0, v1, v2, v3 ) QUAD( V(v0), V(v1), V(v2), V(v3) )
 674 #define INIT(x) intelRenderPrimitive( ctx, x )
 675 #undef LOCAL_VARS
 676 #define LOCAL_VARS                                              \
 677     struct intel_context *intel = intel_context(ctx);                   \
 678     GLubyte *vertptr = (GLubyte *)intel->verts;                 \
 679     const GLuint vertsize = intel->vertex_size;         \
 680     const GLuint * const elt = TNL_CONTEXT(ctx)->vb.Elts;       \
 681     (void) elt;
 682 #define RESET_STIPPLE
 683 #define RESET_OCCLUSION
 684 #define PRESERVE_VB_DEFS
 685 #define ELT(x) x
 686 #define TAG(x) intel_##x##_verts
 687 #include "tnl/t_vb_rendertmp.h"
 688 #undef ELT
 689 #undef TAG
 690 #define TAG(x) intel_##x##_elts
 691 #define ELT(x) elt[x]
 692 #include "tnl/t_vb_rendertmp.h"
 693
 694 /**********************************************************************/
 695 /*                   Render clipped primitives                        */
 696 /**********************************************************************/
 697
 698
 699
 700 static void
 701 intelRenderClippedPoly(GLcontext * ctx, const GLuint * elts, GLuint n)
 702 {
 703    struct intel_context *intel = intel_context(ctx);
 704    TNLcontext *tnl = TNL_CONTEXT(ctx);
 705    struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
 706    GLuint prim = intel->render_primitive;
 707
 708    /* Render the new vertices as an unclipped polygon.
 709     */
 710    {
 711       GLuint *tmp = VB->Elts;
 712       VB->Elts = (GLuint *) elts;
 713       tnl->Driver.Render.PrimTabElts[GL_POLYGON] (ctx, 0, n,
 714                                                   PRIM_BEGIN | PRIM_END);
 715       VB->Elts = tmp;
 716    }
 717
 718    /* Restore the render primitive
 719     */
 720    if (prim != GL_POLYGON)
 721       tnl->Driver.Render.PrimitiveNotify(ctx, prim);
 722 }
 723
 724 static void
 725 intelRenderClippedLine(GLcontext * ctx, GLuint ii, GLuint jj)
 726 {
 727    TNLcontext *tnl = TNL_CONTEXT(ctx);
 728
 729    tnl->Driver.Render.Line(ctx, ii, jj);
 730 }
 731
 732 static void
 733 intelFastRenderClippedPoly(GLcontext * ctx, const GLuint * elts, GLuint n)
 734 {
 735    struct intel_context *intel = intel_context(ctx);
 736    const GLuint vertsize = intel->vertex_size;
 737    GLuint *vb = intelExtendInlinePrimitive(intel, (n - 2) * 3 * vertsize);
 738    GLubyte *vertptr = (GLubyte *) intel->verts;
 739    const GLuint *start = (const GLuint *) V(elts[0]);
 740    int i, j;
 741
 742    for (i = 2; i < n; i++) {
 743       COPY_DWORDS(j, vb, vertsize, V(elts[i - 1]));
 744       COPY_DWORDS(j, vb, vertsize, V(elts[i]));
 745       COPY_DWORDS(j, vb, vertsize, start);
 746    }
 747 }
 748
 749 /**********************************************************************/
 750 /*                    Choose render functions                         */
 751 /**********************************************************************/
 752
 753
 754
 755
 756 #define ANY_FALLBACK_FLAGS (DD_LINE_STIPPLE | DD_TRI_STIPPLE | DD_POINT_ATTEN | DD_POINT_SMOOTH | DD_TRI_SMOOTH)
 757 #define ANY_RASTER_FLAGS (DD_TRI_LIGHT_TWOSIDE | DD_TRI_OFFSET | DD_TRI_UNFILLED)
 758
 759 void
 760 intelChooseRenderState(GLcontext * ctx)
 761 {
 762    TNLcontext *tnl = TNL_CONTEXT(ctx);
 763    struct intel_context *intel = intel_context(ctx);
 764    GLuint flags = ctx->_TriangleCaps;
 765    const struct gl_fragment_program *fprog = ctx->FragmentProgram._Current;
 766    GLboolean have_wpos = (fprog && (fprog->Base.InputsRead & FRAG_BIT_WPOS));
 767    GLuint index = 0;
 768
 769    if (INTEL_DEBUG & DEBUG_STATE)
 770       fprintf(stderr, "\n%s\n", __FUNCTION__);
 771
 772    if ((flags & (ANY_FALLBACK_FLAGS | ANY_RASTER_FLAGS)) || have_wpos) {
 773
 774       if (flags & ANY_RASTER_FLAGS) {
 775          if (flags & DD_TRI_LIGHT_TWOSIDE)
 776             index |= INTEL_TWOSIDE_BIT;
 777          if (flags & DD_TRI_OFFSET)
 778             index |= INTEL_OFFSET_BIT;
 779          if (flags & DD_TRI_UNFILLED)
 780             index |= INTEL_UNFILLED_BIT;
 781       }
 782
 783       if (have_wpos) {
 784          intel->draw_point = intel_wpos_point;
 785          intel->draw_line = intel_wpos_line;
 786          intel->draw_tri = intel_wpos_triangle;
 787
 788          /* Make sure these get called:
 789           */
 790          index |= INTEL_FALLBACK_BIT;
 791       }
 792       else {
 793          intel->draw_point = intel_draw_point;
 794          intel->draw_line = intel_draw_line;
 795          intel->draw_tri = intel_draw_triangle;
 796       }
 797
 798       /* Hook in fallbacks for specific primitives.
 799        */
 800       if (flags & ANY_FALLBACK_FLAGS) {
 801          if (flags & DD_LINE_STIPPLE)
 802             intel->draw_line = intel_fallback_line;
 803
 804          if ((flags & DD_TRI_STIPPLE) && !intel->hw_stipple)
 805             intel->draw_tri = intel_fallback_tri;
 806
 807          if (flags & DD_TRI_SMOOTH) {
 808             if (intel->strict_conformance)
 809                intel->draw_tri = intel_fallback_tri;
 810          }
 811
 812          if (flags & DD_POINT_ATTEN) {
 813             if (0)
 814                intel->draw_point = intel_atten_point;
 815             else
 816                intel->draw_point = intel_fallback_point;
 817          }
 818
 819          if (flags & DD_POINT_SMOOTH) {
 820             if (intel->strict_conformance)
 821                intel->draw_point = intel_fallback_point;
 822          }
 823
 824          index |= INTEL_FALLBACK_BIT;
 825       }
 826    }
 827
 828    if (intel->RenderIndex != index) {
 829       intel->RenderIndex = index;
 830
 831       tnl->Driver.Render.Points = rast_tab[index].points;
 832       tnl->Driver.Render.Line = rast_tab[index].line;
 833       tnl->Driver.Render.Triangle = rast_tab[index].triangle;
 834       tnl->Driver.Render.Quad = rast_tab[index].quad;
 835
 836       if (index == 0) {
 837          tnl->Driver.Render.PrimTabVerts = intel_render_tab_verts;
 838          tnl->Driver.Render.PrimTabElts = intel_render_tab_elts;
 839          tnl->Driver.Render.ClippedLine = line; /* from tritmp.h */
 840          tnl->Driver.Render.ClippedPolygon = intelFastRenderClippedPoly;
 841       }
 842       else {
 843          tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 844          tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 845          tnl->Driver.Render.ClippedLine = intelRenderClippedLine;
 846          tnl->Driver.Render.ClippedPolygon = intelRenderClippedPoly;
 847       }
 848    }
 849 }
 850
 851 static const GLenum reduced_prim[GL_POLYGON + 1] = {
 852    GL_POINTS,
 853    GL_LINES,
 854    GL_LINES,
 855    GL_LINES,
 856    GL_TRIANGLES,
 857    GL_TRIANGLES,
 858    GL_TRIANGLES,
 859    GL_TRIANGLES,
 860    GL_TRIANGLES,
 861    GL_TRIANGLES
 862 };
 863
 864
 865 /**********************************************************************/
 866 /*                 High level hooks for t_vb_render.c                 */
 867 /**********************************************************************/
 868
 869
 870
 871
 872 static void
 873 intelRunPipeline(GLcontext * ctx)
 874 {
 875    struct intel_context *intel = intel_context(ctx);
 876
 877    _mesa_lock_context_textures(ctx);
 878
 879    if (ctx->NewState)
 880       _mesa_update_state_locked(ctx);
 881
 882    if (intel->NewGLState) {
 883       if (intel->NewGLState & _NEW_TEXTURE) {
 884          intel->vtbl.update_texture_state(intel);
 885       }
 886
 887       if (!intel->Fallback) {
 888          if (intel->NewGLState & _INTEL_NEW_RENDERSTATE)
 889             intelChooseRenderState(ctx);
 890       }
 891
 892       intel->NewGLState = 0;
 893    }
 894
 895    _tnl_run_pipeline(ctx);
 896
 897    _mesa_unlock_context_textures(ctx);
 898 }
 899
 900 static void
 901 intelRenderStart(GLcontext * ctx)
 902 {
 903    struct intel_context *intel = intel_context(ctx);
 904
 905    intel->vtbl.render_start(intel_context(ctx));
 906    intel->vtbl.emit_state(intel);
 907 }
 908
 909 static void
 910 intelRenderFinish(GLcontext * ctx)
 911 {
 912    struct intel_context *intel = intel_context(ctx);
 913
 914    if (intel->RenderIndex & INTEL_FALLBACK_BIT)
 915       _swrast_flush(ctx);
 916
 917    INTEL_FIREVERTICES(intel);
 918 }
 919
 920
 921
 922
 923  /* System to flush dma and emit state changes based on the rasterized
 924   * primitive.
 925   */
 926 static void
 927 intelRasterPrimitive(GLcontext * ctx, GLenum rprim, GLuint hwprim)
 928 {
 929    struct intel_context *intel = intel_context(ctx);
 930
 931    if (0)
 932       fprintf(stderr, "%s %s %x\n", __FUNCTION__,
 933               _mesa_lookup_enum_by_nr(rprim), hwprim);
 934
 935    intel->vtbl.reduced_primitive_state(intel, rprim);
 936
 937    /* Start a new primitive.  Arrange to have it flushed later on.
 938     */
 939    if (hwprim != intel->prim.primitive) {
 940       INTEL_FIREVERTICES(intel);
 941
 942       intelStartInlinePrimitive(intel, hwprim, INTEL_BATCH_CLIPRECTS);
 943    }
 944 }
 945
 946
 947  /*
 948   */
 949 static void
 950 intelRenderPrimitive(GLcontext * ctx, GLenum prim)
 951 {
 952    struct intel_context *intel = intel_context(ctx);
 953
 954    if (0)
 955       fprintf(stderr, "%s %s\n", __FUNCTION__, _mesa_lookup_enum_by_nr(prim));
 956
 957    /* Let some clipping routines know which primitive they're dealing
 958     * with.
 959     */
 960    intel->render_primitive = prim;
 961
 962    /* Shortcircuit this when called from t_dd_rendertmp.h for unfilled
 963     * triangles.  The rasterized primitive will always be reset by
 964     * lower level functions in that case, potentially pingponging the
 965     * state:
 966     */
 967    if (reduced_prim[prim] == GL_TRIANGLES &&
 968        (ctx->_TriangleCaps & DD_TRI_UNFILLED))
 969       return;
 970
 971    /* Set some primitive-dependent state and Start? a new primitive.
 972     */
 973    intelRasterPrimitive(ctx, reduced_prim[prim], hw_prim[prim]);
 974 }
 975
 976
 977  /**********************************************************************/
 978  /*           Transition to/from hardware rasterization.               */
 979  /**********************************************************************/
 980
 981 static char *fallbackStrings[] = {
 982    [0] = "Draw buffer",
 983    [1] = "Read buffer",
 984    [2] = "Depth buffer",
 985    [3] = "Stencil buffer",
 986    [4] = "User disable",
 987    [5] = "Render mode",
 988
 989    [12] = "Texture",
 990    [13] = "Color mask",
 991    [14] = "Stencil",
 992    [15] = "Stipple",
 993    [16] = "Program",
 994    [17] = "Logic op",
 995    [18] = "Smooth polygon",
 996    [19] = "Smooth point",
 997 };
 998
 999
1000 static char *
1001 getFallbackString(GLuint bit)
1002 {
1003    int i = 0;
1004    while (bit > 1) {
1005       i++;
1006       bit >>= 1;
1007    }
1008    return fallbackStrings[i];
1009 }
1010
1011
1012
1013 void
1014 intelFallback(struct intel_context *intel, GLuint bit, GLboolean mode)
1015 {
1016    GLcontext *ctx = &intel->ctx;
1017    TNLcontext *tnl = TNL_CONTEXT(ctx);
1018    GLuint oldfallback = intel->Fallback;
1019
1020    if (mode) {
1021       intel->Fallback |= bit;
1022       if (oldfallback == 0) {
1023          intelFlush(ctx);
1024          if (INTEL_DEBUG & DEBUG_FALLBACKS)
1025             fprintf(stderr, "ENTER FALLBACK %x: %s\n",
1026                     bit, getFallbackString(bit));
1027          _swsetup_Wakeup(ctx);
1028          intel->RenderIndex = ~0;
1029       }
1030    }
1031    else {
1032       intel->Fallback &= ~bit;
1033       if (oldfallback == bit) {
1034          _swrast_flush(ctx);
1035          if (INTEL_DEBUG & DEBUG_FALLBACKS)
1036             fprintf(stderr, "LEAVE FALLBACK %s\n", getFallbackString(bit));
1037          tnl->Driver.Render.Start = intelRenderStart;
1038          tnl->Driver.Render.PrimitiveNotify = intelRenderPrimitive;
1039          tnl->Driver.Render.Finish = intelRenderFinish;
1040          tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
1041          tnl->Driver.Render.CopyPV = _tnl_copy_pv;
1042          tnl->Driver.Render.Interp = _tnl_interp;
1043
1044          _tnl_invalidate_vertex_state(ctx, ~0);
1045          _tnl_invalidate_vertices(ctx, ~0);
1046          _tnl_install_attrs(ctx,
1047                             intel->vertex_attrs,
1048                             intel->vertex_attr_count,
1049                             intel->ViewportMatrix.m, 0);
1050
1051          intel->NewGLState |= _INTEL_NEW_RENDERSTATE;
1052       }
1053    }
1054 }
1055
1056 union fi
1057 {
1058    GLfloat f;
1059    GLint i;
1060 };
1061
1062
1063 /**********************************************************************/
1064 /*             Used only with the metaops callbacks.                  */
1065 /**********************************************************************/
1066 void
1067 intel_meta_draw_poly(struct intel_context *intel,
1068                      GLuint n,
1069                      GLfloat xy[][2],
1070                      GLfloat z, GLuint color, GLfloat tex[][2])
1071 {
1072    union fi *vb;
1073    GLint i;
1074
1075    /* All 3d primitives should be emitted with INTEL_BATCH_CLIPRECTS,
1076     * otherwise the drawing origin (DR4) might not be set correctly.
1077     */
1078    intelStartInlinePrimitive(intel, PRIM3D_TRIFAN, INTEL_BATCH_CLIPRECTS);
1079    vb = (union fi *) intelExtendInlinePrimitive(intel, n * 6);
1080
1081    for (i = 0; i < n; i++) {
1082       vb[0].f = xy[i][0];
1083       vb[1].f = xy[i][1];
1084       vb[2].f = z;
1085       vb[3].i = color;
1086       vb[4].f = tex[i][0];
1087       vb[5].f = tex[i][1];
1088       vb += 6;
1089    }
1090
1091    INTEL_FIREVERTICES(intel);
1092 }
1093
1094 void
1095 intel_meta_draw_quad(struct intel_context *intel,
1096                      GLfloat x0, GLfloat x1,
1097                      GLfloat y0, GLfloat y1,
1098                      GLfloat z,
1099                      GLuint color,
1100                      GLfloat s0, GLfloat s1, GLfloat t0, GLfloat t1)
1101 {
1102    GLfloat xy[4][2];
1103    GLfloat tex[4][2];
1104
1105    xy[0][0] = x0;
1106    xy[0][1] = y0;
1107    xy[1][0] = x1;
1108    xy[1][1] = y0;
1109    xy[2][0] = x1;
1110    xy[2][1] = y1;
1111    xy[3][0] = x0;
1112    xy[3][1] = y1;
1113
1114    tex[0][0] = s0;
1115    tex[0][1] = t0;
1116    tex[1][0] = s1;
1117    tex[1][1] = t0;
1118    tex[2][0] = s1;
1119    tex[2][1] = t1;
1120    tex[3][0] = s0;
1121    tex[3][1] = t1;
1122
1123    intel_meta_draw_poly(intel, 4, xy, z, color, tex);
1124 }
1125
1126
1127
1128 /**********************************************************************/
1129 /*                            Initialization.                         */
1130 /**********************************************************************/
1131
1132
1133 void
1134 intelInitTriFuncs(GLcontext * ctx)
1135 {
1136    TNLcontext *tnl = TNL_CONTEXT(ctx);
1137    static int firsttime = 1;
1138
1139    if (firsttime) {
1140       init_rast_tab();
1141       firsttime = 0;
1142    }
1143
1144    tnl->Driver.RunPipeline = intelRunPipeline;
1145    tnl->Driver.Render.Start = intelRenderStart;
1146    tnl->Driver.Render.Finish = intelRenderFinish;
1147    tnl->Driver.Render.PrimitiveNotify = intelRenderPrimitive;
1148    tnl->Driver.Render.ResetLineStipple = _swrast_ResetLineStipple;
1149    tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
1150    tnl->Driver.Render.CopyPV = _tnl_copy_pv;
1151    tnl->Driver.Render.Interp = _tnl_interp;
1152 }