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