src/mesa/drivers/dri/i915/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    assert(intel->batch->id == intel->last_state_batch_id);
 115    assert((intel->batch->dirty_state & (1<<1)) == 0);
 116
 117    intel->prim.start_ptr = intel->batch->ptr;
 118    intel->prim.primitive = prim;
 119    intel->prim.flush = intel_flush_inline_primitive;
 120
 121    OUT_BATCH(0);
 122    ADVANCE_BATCH();
 123
 124 /*    _mesa_printf(">"); */
 125 }
 126
 127
 128 void
 129 intelWrapInlinePrimitive(struct intel_context *intel)
 130 {
 131    GLuint prim = intel->prim.primitive;
 132    GLuint batchflags = intel->batch->flags;
 133
 134    intel_flush_inline_primitive(intel);
 135    intel_batchbuffer_flush(intel->batch);
 136    intelStartInlinePrimitive(intel, prim, batchflags);  /* ??? */
 137 }
 138
 139 GLuint *
 140 intelExtendInlinePrimitive(struct intel_context *intel, GLuint dwords)
 141 {
 142    GLuint sz = dwords * sizeof(GLuint);
 143    GLuint *ptr;
 144
 145    assert(intel->prim.flush == intel_flush_inline_primitive);
 146
 147    if (intel_batchbuffer_space(intel->batch) < sz)
 148       intelWrapInlinePrimitive(intel);
 149
 150 /*    _mesa_printf("."); */
 151
 152    intel->vtbl.assert_not_dirty(intel);
 153
 154    ptr = (GLuint *) intel->batch->ptr;
 155    intel->batch->ptr += sz;
 156
 157    return ptr;
 158 }
 159
 160
 161
 162 /***********************************************************************
 163  *                    Emit primitives as inline vertices               *
 164  ***********************************************************************/
 165
 166 #ifdef __i386__
 167 #define COPY_DWORDS( j, vb, vertsize, v )                       \
 168 do {                                                            \
 169    int __tmp;                                                   \
 170    __asm__ __volatile__( "rep ; movsl"                          \
 171                          : "=%c" (j), "=D" (vb), "=S" (__tmp)   \
 172                          : "0" (vertsize),                      \
 173                          "D" ((long)vb),                        \
 174                          "S" ((long)v) );                       \
 175 } while (0)
 176 #else
 177 #define COPY_DWORDS( j, vb, vertsize, v )       \
 178 do {                                            \
 179    for ( j = 0 ; j < vertsize ; j++ ) {         \
 180       vb[j] = ((GLuint *)v)[j];                 \
 181    }                                            \
 182    vb += vertsize;                              \
 183 } while (0)
 184 #endif
 185
 186 static void
 187 intel_draw_quad(struct intel_context *intel,
 188                 intelVertexPtr v0,
 189                 intelVertexPtr v1, intelVertexPtr v2, intelVertexPtr v3)
 190 {
 191    GLuint vertsize = intel->vertex_size;
 192    GLuint *vb = intelExtendInlinePrimitive(intel, 6 * vertsize);
 193    int j;
 194
 195    COPY_DWORDS(j, vb, vertsize, v0);
 196    COPY_DWORDS(j, vb, vertsize, v1);
 197
 198    /* If smooth shading, draw like a trifan which gives better
 199     * rasterization.  Otherwise draw as two triangles with provoking
 200     * vertex in third position as required for flat shading.
 201     */
 202    if (intel->ctx.Light.ShadeModel == GL_FLAT) {
 203       COPY_DWORDS(j, vb, vertsize, v3);
 204       COPY_DWORDS(j, vb, vertsize, v1);
 205    }
 206    else {
 207       COPY_DWORDS(j, vb, vertsize, v2);
 208       COPY_DWORDS(j, vb, vertsize, v0);
 209    }
 210
 211    COPY_DWORDS(j, vb, vertsize, v2);
 212    COPY_DWORDS(j, vb, vertsize, v3);
 213 }
 214
 215 static void
 216 intel_draw_triangle(struct intel_context *intel,
 217                     intelVertexPtr v0, intelVertexPtr v1, intelVertexPtr v2)
 218 {
 219    GLuint vertsize = intel->vertex_size;
 220    GLuint *vb = intelExtendInlinePrimitive(intel, 3 * vertsize);
 221    int j;
 222
 223    COPY_DWORDS(j, vb, vertsize, v0);
 224    COPY_DWORDS(j, vb, vertsize, v1);
 225    COPY_DWORDS(j, vb, vertsize, v2);
 226 }
 227
 228
 229 static void
 230 intel_draw_line(struct intel_context *intel,
 231                 intelVertexPtr v0, intelVertexPtr v1)
 232 {
 233    GLuint vertsize = intel->vertex_size;
 234    GLuint *vb = intelExtendInlinePrimitive(intel, 2 * vertsize);
 235    int j;
 236
 237    COPY_DWORDS(j, vb, vertsize, v0);
 238    COPY_DWORDS(j, vb, vertsize, v1);
 239 }
 240
 241
 242 static void
 243 intel_draw_point(struct intel_context *intel, intelVertexPtr v0)
 244 {
 245    GLuint vertsize = intel->vertex_size;
 246    GLuint *vb = intelExtendInlinePrimitive(intel, vertsize);
 247    int j;
 248
 249    /* Adjust for sub pixel position -- still required for conform. */
 250    *(float *) &vb[0] = v0->v.x - 0.125;
 251    *(float *) &vb[1] = v0->v.y - 0.125;
 252    for (j = 2; j < vertsize; j++)
 253       vb[j] = v0->ui[j];
 254 }
 255
 256
 257
 258 /***********************************************************************
 259  *                Fixup for ARB_point_parameters                       *
 260  ***********************************************************************/
 261
 262 /* Currently not working - VERT_ATTRIB_POINTSIZE isn't correctly
 263  * represented in the fragment program InputsRead field.
 264  */
 265 static void
 266 intel_atten_point(struct intel_context *intel, intelVertexPtr v0)
 267 {
 268    GLcontext *ctx = &intel->ctx;
 269    GLfloat psz[4], col[4], restore_psz, restore_alpha;
 270
 271    _tnl_get_attr(ctx, v0, _TNL_ATTRIB_POINTSIZE, psz);
 272    _tnl_get_attr(ctx, v0, _TNL_ATTRIB_COLOR0, col);
 273
 274    restore_psz = psz[0];
 275    restore_alpha = col[3];
 276
 277    if (psz[0] >= ctx->Point.Threshold) {
 278       psz[0] = MIN2(psz[0], ctx->Point.MaxSize);
 279    }
 280    else {
 281       GLfloat dsize = psz[0] / ctx->Point.Threshold;
 282       psz[0] = MAX2(ctx->Point.Threshold, ctx->Point.MinSize);
 283       col[3] *= dsize * dsize;
 284    }
 285
 286    if (psz[0] < 1.0)
 287       psz[0] = 1.0;
 288
 289    if (restore_psz != psz[0] || restore_alpha != col[3]) {
 290       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_POINTSIZE, psz);
 291       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_COLOR0, col);
 292
 293       intel_draw_point(intel, v0);
 294
 295       psz[0] = restore_psz;
 296       col[3] = restore_alpha;
 297
 298       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_POINTSIZE, psz);
 299       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_COLOR0, col);
 300    }
 301    else
 302       intel_draw_point(intel, v0);
 303 }
 304
 305
 306
 307
 308
 309 /***********************************************************************
 310  *                Fixup for I915 WPOS texture coordinate                *
 311  ***********************************************************************/
 312
 313
 314
 315 static void
 316 intel_wpos_triangle(struct intel_context *intel,
 317                     intelVertexPtr v0, intelVertexPtr v1, intelVertexPtr v2)
 318 {
 319    GLuint offset = intel->wpos_offset;
 320    GLuint size = intel->wpos_size;
 321
 322    __memcpy(((char *) v0) + offset, v0, size);
 323    __memcpy(((char *) v1) + offset, v1, size);
 324    __memcpy(((char *) v2) + offset, v2, size);
 325
 326    intel_draw_triangle(intel, v0, v1, v2);
 327 }
 328
 329
 330 static void
 331 intel_wpos_line(struct intel_context *intel,
 332                 intelVertexPtr v0, intelVertexPtr v1)
 333 {
 334    GLuint offset = intel->wpos_offset;
 335    GLuint size = intel->wpos_size;
 336
 337    __memcpy(((char *) v0) + offset, v0, size);
 338    __memcpy(((char *) v1) + offset, v1, size);
 339
 340    intel_draw_line(intel, v0, v1);
 341 }
 342
 343
 344 static void
 345 intel_wpos_point(struct intel_context *intel, intelVertexPtr v0)
 346 {
 347    GLuint offset = intel->wpos_offset;
 348    GLuint size = intel->wpos_size;
 349
 350    __memcpy(((char *) v0) + offset, v0, size);
 351
 352    intel_draw_point(intel, v0);
 353 }
 354
 355
 356
 357
 358
 359
 360 /***********************************************************************
 361  *          Macros for t_dd_tritmp.h to draw basic primitives          *
 362  ***********************************************************************/
 363
 364 #define TRI( a, b, c )                          \
 365 do {                                            \
 366    if (DO_FALLBACK)                             \
 367       intel->draw_tri( intel, a, b, c );        \
 368    else                                         \
 369       intel_draw_triangle( intel, a, b, c );    \
 370 } while (0)
 371
 372 #define QUAD( a, b, c, d )                      \
 373 do {                                            \
 374    if (DO_FALLBACK) {                           \
 375       intel->draw_tri( intel, a, b, d );        \
 376       intel->draw_tri( intel, b, c, d );        \
 377    } else                                       \
 378       intel_draw_quad( intel, a, b, c, d );     \
 379 } while (0)
 380
 381 #define LINE( v0, v1 )                          \
 382 do {                                            \
 383    if (DO_FALLBACK)                             \
 384       intel->draw_line( intel, v0, v1 );        \
 385    else                                         \
 386       intel_draw_line( intel, v0, v1 );         \
 387 } while (0)
 388
 389 #define POINT( v0 )                             \
 390 do {                                            \
 391    if (DO_FALLBACK)                             \
 392       intel->draw_point( intel, v0 );           \
 393    else                                         \
 394       intel_draw_point( intel, v0 );            \
 395 } while (0)
 396
 397
 398 /***********************************************************************
 399  *              Build render functions from dd templates               *
 400  ***********************************************************************/
 401
 402 #define INTEL_OFFSET_BIT        0x01
 403 #define INTEL_TWOSIDE_BIT       0x02
 404 #define INTEL_UNFILLED_BIT      0x04
 405 #define INTEL_FALLBACK_BIT      0x08
 406 #define INTEL_MAX_TRIFUNC       0x10
 407
 408
 409 static struct
 410 {
 411    tnl_points_func points;
 412    tnl_line_func line;
 413    tnl_triangle_func triangle;
 414    tnl_quad_func quad;
 415 } rast_tab[INTEL_MAX_TRIFUNC];
 416
 417
 418 #define DO_FALLBACK (IND & INTEL_FALLBACK_BIT)
 419 #define DO_OFFSET   (IND & INTEL_OFFSET_BIT)
 420 #define DO_UNFILLED (IND & INTEL_UNFILLED_BIT)
 421 #define DO_TWOSIDE  (IND & INTEL_TWOSIDE_BIT)
 422 #define DO_FLAT      0
 423 #define DO_TRI       1
 424 #define DO_QUAD      1
 425 #define DO_LINE      1
 426 #define DO_POINTS    1
 427 #define DO_FULL_QUAD 1
 428
 429 #define HAVE_RGBA         1
 430 #define HAVE_SPEC         1
 431 #define HAVE_BACK_COLORS  0
 432 #define HAVE_HW_FLATSHADE 1
 433 #define VERTEX            intelVertex
 434 #define TAB               rast_tab
 435
 436 /* Only used to pull back colors into vertices (ie, we know color is
 437  * floating point).
 438  */
 439 #define INTEL_COLOR( dst, src )                         \
 440 do {                                                    \
 441    UNCLAMPED_FLOAT_TO_UBYTE((dst)[0], (src)[2]);        \
 442    UNCLAMPED_FLOAT_TO_UBYTE((dst)[1], (src)[1]);        \
 443    UNCLAMPED_FLOAT_TO_UBYTE((dst)[2], (src)[0]);        \
 444    UNCLAMPED_FLOAT_TO_UBYTE((dst)[3], (src)[3]);        \
 445 } while (0)
 446
 447 #define INTEL_SPEC( dst, src )                          \
 448 do {                                                    \
 449    UNCLAMPED_FLOAT_TO_UBYTE((dst)[0], (src)[2]);        \
 450    UNCLAMPED_FLOAT_TO_UBYTE((dst)[1], (src)[1]);        \
 451    UNCLAMPED_FLOAT_TO_UBYTE((dst)[2], (src)[0]);        \
 452 } while (0)
 453
 454
 455 #define DEPTH_SCALE intel->polygon_offset_scale
 456 #define UNFILLED_TRI unfilled_tri
 457 #define UNFILLED_QUAD unfilled_quad
 458 #define VERT_X(_v) _v->v.x
 459 #define VERT_Y(_v) _v->v.y
 460 #define VERT_Z(_v) _v->v.z
 461 #define AREA_IS_CCW( a ) (a > 0)
 462 #define GET_VERTEX(e) (intel->verts + (e * intel->vertex_size * sizeof(GLuint)))
 463
 464 #define VERT_SET_RGBA( v, c )    if (coloroffset) INTEL_COLOR( v->ub4[coloroffset], c )
 465 #define VERT_COPY_RGBA( v0, v1 ) if (coloroffset) v0->ui[coloroffset] = v1->ui[coloroffset]
 466 #define VERT_SAVE_RGBA( idx )    if (coloroffset) color[idx] = v[idx]->ui[coloroffset]
 467 #define VERT_RESTORE_RGBA( idx ) if (coloroffset) v[idx]->ui[coloroffset] = color[idx]
 468
 469 #define VERT_SET_SPEC( v, c )    if (specoffset) INTEL_SPEC( v->ub4[specoffset], c )
 470 #define VERT_COPY_SPEC( v0, v1 ) if (specoffset) COPY_3V(v0->ub4[specoffset], v1->ub4[specoffset])
 471 #define VERT_SAVE_SPEC( idx )    if (specoffset) spec[idx] = v[idx]->ui[specoffset]
 472 #define VERT_RESTORE_SPEC( idx ) if (specoffset) v[idx]->ui[specoffset] = spec[idx]
 473
 474 #define LOCAL_VARS(n)                                                   \
 475    struct intel_context *intel = intel_context(ctx);                            \
 476    GLuint color[n], spec[n];                                            \
 477    GLuint coloroffset = intel->coloroffset;             \
 478    GLboolean specoffset = intel->specoffset;                    \
 479    (void) color; (void) spec; (void) coloroffset; (void) specoffset;
 480
 481
 482 /***********************************************************************
 483  *                Helpers for rendering unfilled primitives            *
 484  ***********************************************************************/
 485
 486 static const GLuint hw_prim[GL_POLYGON + 1] = {
 487    PRIM3D_POINTLIST,
 488    PRIM3D_LINELIST,
 489    PRIM3D_LINELIST,
 490    PRIM3D_LINELIST,
 491    PRIM3D_TRILIST,
 492    PRIM3D_TRILIST,
 493    PRIM3D_TRILIST,
 494    PRIM3D_TRILIST,
 495    PRIM3D_TRILIST,
 496    PRIM3D_TRILIST
 497 };
 498
 499 #define RASTERIZE(x) intelRasterPrimitive( ctx, x, hw_prim[x] )
 500 #define RENDER_PRIMITIVE intel->render_primitive
 501 #define TAG(x) x
 502 #define IND INTEL_FALLBACK_BIT
 503 #include "tnl_dd/t_dd_unfilled.h"
 504 #undef IND
 505
 506 /***********************************************************************
 507  *                      Generate GL render functions                   *
 508  ***********************************************************************/
 509
 510 #define IND (0)
 511 #define TAG(x) x
 512 #include "tnl_dd/t_dd_tritmp.h"
 513
 514 #define IND (INTEL_OFFSET_BIT)
 515 #define TAG(x) x##_offset
 516 #include "tnl_dd/t_dd_tritmp.h"
 517
 518 #define IND (INTEL_TWOSIDE_BIT)
 519 #define TAG(x) x##_twoside
 520 #include "tnl_dd/t_dd_tritmp.h"
 521
 522 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT)
 523 #define TAG(x) x##_twoside_offset
 524 #include "tnl_dd/t_dd_tritmp.h"
 525
 526 #define IND (INTEL_UNFILLED_BIT)
 527 #define TAG(x) x##_unfilled
 528 #include "tnl_dd/t_dd_tritmp.h"
 529
 530 #define IND (INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT)
 531 #define TAG(x) x##_offset_unfilled
 532 #include "tnl_dd/t_dd_tritmp.h"
 533
 534 #define IND (INTEL_TWOSIDE_BIT|INTEL_UNFILLED_BIT)
 535 #define TAG(x) x##_twoside_unfilled
 536 #include "tnl_dd/t_dd_tritmp.h"
 537
 538 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT)
 539 #define TAG(x) x##_twoside_offset_unfilled
 540 #include "tnl_dd/t_dd_tritmp.h"
 541
 542 #define IND (INTEL_FALLBACK_BIT)
 543 #define TAG(x) x##_fallback
 544 #include "tnl_dd/t_dd_tritmp.h"
 545
 546 #define IND (INTEL_OFFSET_BIT|INTEL_FALLBACK_BIT)
 547 #define TAG(x) x##_offset_fallback
 548 #include "tnl_dd/t_dd_tritmp.h"
 549
 550 #define IND (INTEL_TWOSIDE_BIT|INTEL_FALLBACK_BIT)
 551 #define TAG(x) x##_twoside_fallback
 552 #include "tnl_dd/t_dd_tritmp.h"
 553
 554 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT|INTEL_FALLBACK_BIT)
 555 #define TAG(x) x##_twoside_offset_fallback
 556 #include "tnl_dd/t_dd_tritmp.h"
 557
 558 #define IND (INTEL_UNFILLED_BIT|INTEL_FALLBACK_BIT)
 559 #define TAG(x) x##_unfilled_fallback
 560 #include "tnl_dd/t_dd_tritmp.h"
 561
 562 #define IND (INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT|INTEL_FALLBACK_BIT)
 563 #define TAG(x) x##_offset_unfilled_fallback
 564 #include "tnl_dd/t_dd_tritmp.h"
 565
 566 #define IND (INTEL_TWOSIDE_BIT|INTEL_UNFILLED_BIT|INTEL_FALLBACK_BIT)
 567 #define TAG(x) x##_twoside_unfilled_fallback
 568 #include "tnl_dd/t_dd_tritmp.h"
 569
 570 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT| \
 571              INTEL_FALLBACK_BIT)
 572 #define TAG(x) x##_twoside_offset_unfilled_fallback
 573 #include "tnl_dd/t_dd_tritmp.h"
 574
 575
 576 static void
 577 init_rast_tab(void)
 578 {
 579    init();
 580    init_offset();
 581    init_twoside();
 582    init_twoside_offset();
 583    init_unfilled();
 584    init_offset_unfilled();
 585    init_twoside_unfilled();
 586    init_twoside_offset_unfilled();
 587    init_fallback();
 588    init_offset_fallback();
 589    init_twoside_fallback();
 590    init_twoside_offset_fallback();
 591    init_unfilled_fallback();
 592    init_offset_unfilled_fallback();
 593    init_twoside_unfilled_fallback();
 594    init_twoside_offset_unfilled_fallback();
 595 }
 596
 597
 598 /***********************************************************************
 599  *                    Rasterization fallback helpers                   *
 600  ***********************************************************************/
 601
 602
 603 /* This code is hit only when a mix of accelerated and unaccelerated
 604  * primitives are being drawn, and only for the unaccelerated
 605  * primitives.
 606  */
 607 static void
 608 intel_fallback_tri(struct intel_context *intel,
 609                    intelVertex * v0, intelVertex * v1, intelVertex * v2)
 610 {
 611    GLcontext *ctx = &intel->ctx;
 612    SWvertex v[3];
 613
 614    if (0)
 615       fprintf(stderr, "\n%s\n", __FUNCTION__);
 616
 617    INTEL_FIREVERTICES(intel);
 618
 619    _swsetup_Translate(ctx, v0, &v[0]);
 620    _swsetup_Translate(ctx, v1, &v[1]);
 621    _swsetup_Translate(ctx, v2, &v[2]);
 622    intelSpanRenderStart(ctx);
 623    _swrast_Triangle(ctx, &v[0], &v[1], &v[2]);
 624    intelSpanRenderFinish(ctx);
 625 }
 626
 627
 628 static void
 629 intel_fallback_line(struct intel_context *intel,
 630                     intelVertex * v0, intelVertex * v1)
 631 {
 632    GLcontext *ctx = &intel->ctx;
 633    SWvertex v[2];
 634
 635    if (0)
 636       fprintf(stderr, "\n%s\n", __FUNCTION__);
 637
 638    INTEL_FIREVERTICES(intel);
 639
 640    _swsetup_Translate(ctx, v0, &v[0]);
 641    _swsetup_Translate(ctx, v1, &v[1]);
 642    intelSpanRenderStart(ctx);
 643    _swrast_Line(ctx, &v[0], &v[1]);
 644    intelSpanRenderFinish(ctx);
 645 }
 646
 647 static void
 648 intel_fallback_point(struct intel_context *intel,
 649                      intelVertex * v0)
 650 {
 651    GLcontext *ctx = &intel->ctx;
 652    SWvertex v[1];
 653
 654    if (0)
 655       fprintf(stderr, "\n%s\n", __FUNCTION__);
 656
 657    INTEL_FIREVERTICES(intel);
 658
 659    _swsetup_Translate(ctx, v0, &v[0]);
 660    intelSpanRenderStart(ctx);
 661    _swrast_Point(ctx, &v[0]);
 662    intelSpanRenderFinish(ctx);
 663 }
 664
 665
 666 /**********************************************************************/
 667 /*               Render unclipped begin/end objects                   */
 668 /**********************************************************************/
 669
 670 #define IND 0
 671 #define V(x) (intelVertex *)(vertptr + ((x)*vertsize*sizeof(GLuint)))
 672 #define RENDER_POINTS( start, count )   \
 673    for ( ; start < count ; start++) POINT( V(ELT(start)) );
 674 #define RENDER_LINE( v0, v1 )         LINE( V(v0), V(v1) )
 675 #define RENDER_TRI(  v0, v1, v2 )     TRI(  V(v0), V(v1), V(v2) )
 676 #define RENDER_QUAD( v0, v1, v2, v3 ) QUAD( V(v0), V(v1), V(v2), V(v3) )
 677 #define INIT(x) intelRenderPrimitive( ctx, x )
 678 #undef LOCAL_VARS
 679 #define LOCAL_VARS                                              \
 680     struct intel_context *intel = intel_context(ctx);                   \
 681     GLubyte *vertptr = (GLubyte *)intel->verts;                 \
 682     const GLuint vertsize = intel->vertex_size;         \
 683     const GLuint * const elt = TNL_CONTEXT(ctx)->vb.Elts;       \
 684     (void) elt;
 685 #define RESET_STIPPLE
 686 #define RESET_OCCLUSION
 687 #define PRESERVE_VB_DEFS
 688 #define ELT(x) x
 689 #define TAG(x) intel_##x##_verts
 690 #include "tnl/t_vb_rendertmp.h"
 691 #undef ELT
 692 #undef TAG
 693 #define TAG(x) intel_##x##_elts
 694 #define ELT(x) elt[x]
 695 #include "tnl/t_vb_rendertmp.h"
 696
 697 /**********************************************************************/
 698 /*                   Render clipped primitives                        */
 699 /**********************************************************************/
 700
 701
 702
 703 static void
 704 intelRenderClippedPoly(GLcontext * ctx, const GLuint * elts, GLuint n)
 705 {
 706    struct intel_context *intel = intel_context(ctx);
 707    TNLcontext *tnl = TNL_CONTEXT(ctx);
 708    struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
 709    GLuint prim = intel->render_primitive;
 710
 711    /* Render the new vertices as an unclipped polygon.
 712     */
 713    {
 714       GLuint *tmp = VB->Elts;
 715       VB->Elts = (GLuint *) elts;
 716       tnl->Driver.Render.PrimTabElts[GL_POLYGON] (ctx, 0, n,
 717                                                   PRIM_BEGIN | PRIM_END);
 718       VB->Elts = tmp;
 719    }
 720
 721    /* Restore the render primitive
 722     */
 723    if (prim != GL_POLYGON)
 724       tnl->Driver.Render.PrimitiveNotify(ctx, prim);
 725 }
 726
 727 static void
 728 intelRenderClippedLine(GLcontext * ctx, GLuint ii, GLuint jj)
 729 {
 730    TNLcontext *tnl = TNL_CONTEXT(ctx);
 731
 732    tnl->Driver.Render.Line(ctx, ii, jj);
 733 }
 734
 735 static void
 736 intelFastRenderClippedPoly(GLcontext * ctx, const GLuint * elts, GLuint n)
 737 {
 738    struct intel_context *intel = intel_context(ctx);
 739    const GLuint vertsize = intel->vertex_size;
 740    GLuint *vb = intelExtendInlinePrimitive(intel, (n - 2) * 3 * vertsize);
 741    GLubyte *vertptr = (GLubyte *) intel->verts;
 742    const GLuint *start = (const GLuint *) V(elts[0]);
 743    int i, j;
 744
 745    for (i = 2; i < n; i++) {
 746       COPY_DWORDS(j, vb, vertsize, V(elts[i - 1]));
 747       COPY_DWORDS(j, vb, vertsize, V(elts[i]));
 748       COPY_DWORDS(j, vb, vertsize, start);
 749    }
 750 }
 751
 752 /**********************************************************************/
 753 /*                    Choose render functions                         */
 754 /**********************************************************************/
 755
 756
 757
 758
 759 #define ANY_FALLBACK_FLAGS (DD_LINE_STIPPLE | DD_TRI_STIPPLE | DD_POINT_ATTEN | DD_POINT_SMOOTH | DD_TRI_SMOOTH)
 760 #define ANY_RASTER_FLAGS (DD_TRI_LIGHT_TWOSIDE | DD_TRI_OFFSET | DD_TRI_UNFILLED)
 761
 762 void
 763 intelChooseRenderState(GLcontext * ctx)
 764 {
 765    TNLcontext *tnl = TNL_CONTEXT(ctx);
 766    struct intel_context *intel = intel_context(ctx);
 767    GLuint flags = ctx->_TriangleCaps;
 768    const struct gl_fragment_program *fprog = ctx->FragmentProgram._Current;
 769    GLboolean have_wpos = (fprog && (fprog->Base.InputsRead & FRAG_BIT_WPOS));
 770    GLuint index = 0;
 771
 772    if (INTEL_DEBUG & DEBUG_STATE)
 773       fprintf(stderr, "\n%s\n", __FUNCTION__);
 774
 775    if ((flags & (ANY_FALLBACK_FLAGS | ANY_RASTER_FLAGS)) || have_wpos) {
 776
 777       if (flags & ANY_RASTER_FLAGS) {
 778          if (flags & DD_TRI_LIGHT_TWOSIDE)
 779             index |= INTEL_TWOSIDE_BIT;
 780          if (flags & DD_TRI_OFFSET)
 781             index |= INTEL_OFFSET_BIT;
 782          if (flags & DD_TRI_UNFILLED)
 783             index |= INTEL_UNFILLED_BIT;
 784       }
 785
 786       if (have_wpos) {
 787          intel->draw_point = intel_wpos_point;
 788          intel->draw_line = intel_wpos_line;
 789          intel->draw_tri = intel_wpos_triangle;
 790
 791          /* Make sure these get called:
 792           */
 793          index |= INTEL_FALLBACK_BIT;
 794       }
 795       else {
 796          intel->draw_point = intel_draw_point;
 797          intel->draw_line = intel_draw_line;
 798          intel->draw_tri = intel_draw_triangle;
 799       }
 800
 801       /* Hook in fallbacks for specific primitives.
 802        */
 803       if (flags & ANY_FALLBACK_FLAGS) {
 804          if (flags & DD_LINE_STIPPLE)
 805             intel->draw_line = intel_fallback_line;
 806
 807          if ((flags & DD_TRI_STIPPLE) && !intel->hw_stipple)
 808             intel->draw_tri = intel_fallback_tri;
 809
 810          if (flags & DD_TRI_SMOOTH) {
 811             if (intel->strict_conformance)
 812                intel->draw_tri = intel_fallback_tri;
 813          }
 814
 815          if (flags & DD_POINT_ATTEN) {
 816             if (0)
 817                intel->draw_point = intel_atten_point;
 818             else
 819                intel->draw_point = intel_fallback_point;
 820          }
 821
 822          if (flags & DD_POINT_SMOOTH) {
 823             if (intel->strict_conformance)
 824                intel->draw_point = intel_fallback_point;
 825          }
 826
 827          index |= INTEL_FALLBACK_BIT;
 828       }
 829    }
 830
 831    if (intel->RenderIndex != index) {
 832       intel->RenderIndex = index;
 833
 834       tnl->Driver.Render.Points = rast_tab[index].points;
 835       tnl->Driver.Render.Line = rast_tab[index].line;
 836       tnl->Driver.Render.Triangle = rast_tab[index].triangle;
 837       tnl->Driver.Render.Quad = rast_tab[index].quad;
 838
 839       if (index == 0) {
 840          tnl->Driver.Render.PrimTabVerts = intel_render_tab_verts;
 841          tnl->Driver.Render.PrimTabElts = intel_render_tab_elts;
 842          tnl->Driver.Render.ClippedLine = line; /* from tritmp.h */
 843          tnl->Driver.Render.ClippedPolygon = intelFastRenderClippedPoly;
 844       }
 845       else {
 846          tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 847          tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 848          tnl->Driver.Render.ClippedLine = intelRenderClippedLine;
 849          tnl->Driver.Render.ClippedPolygon = intelRenderClippedPoly;
 850       }
 851    }
 852 }
 853
 854 static const GLenum reduced_prim[GL_POLYGON + 1] = {
 855    GL_POINTS,
 856    GL_LINES,
 857    GL_LINES,
 858    GL_LINES,
 859    GL_TRIANGLES,
 860    GL_TRIANGLES,
 861    GL_TRIANGLES,
 862    GL_TRIANGLES,
 863    GL_TRIANGLES,
 864    GL_TRIANGLES
 865 };
 866
 867
 868 /**********************************************************************/
 869 /*                 High level hooks for t_vb_render.c                 */
 870 /**********************************************************************/
 871
 872
 873
 874
 875 static void
 876 intelRunPipeline(GLcontext * ctx)
 877 {
 878    struct intel_context *intel = intel_context(ctx);
 879
 880    _mesa_lock_context_textures(ctx);
 881
 882    if (ctx->NewState)
 883       _mesa_update_state_locked(ctx);
 884
 885    if (intel->NewGLState) {
 886       if (intel->NewGLState & _NEW_TEXTURE) {
 887          intel->vtbl.update_texture_state(intel);
 888       }
 889
 890       if (!intel->Fallback) {
 891          if (intel->NewGLState & _INTEL_NEW_RENDERSTATE)
 892             intelChooseRenderState(ctx);
 893       }
 894
 895       intel->NewGLState = 0;
 896    }
 897
 898    _tnl_run_pipeline(ctx);
 899
 900    _mesa_unlock_context_textures(ctx);
 901 }
 902
 903 static void
 904 intelRenderStart(GLcontext * ctx)
 905 {
 906    struct intel_context *intel = intel_context(ctx);
 907
 908    intel->vtbl.render_start(intel_context(ctx));
 909    intel->vtbl.emit_state(intel);
 910 }
 911
 912 static void
 913 intelRenderFinish(GLcontext * ctx)
 914 {
 915    struct intel_context *intel = intel_context(ctx);
 916
 917    if (intel->RenderIndex & INTEL_FALLBACK_BIT)
 918       _swrast_flush(ctx);
 919
 920    INTEL_FIREVERTICES(intel);
 921 }
 922
 923
 924
 925
 926  /* System to flush dma and emit state changes based on the rasterized
 927   * primitive.
 928   */
 929 static void
 930 intelRasterPrimitive(GLcontext * ctx, GLenum rprim, GLuint hwprim)
 931 {
 932    struct intel_context *intel = intel_context(ctx);
 933
 934    if (0)
 935       fprintf(stderr, "%s %s %x\n", __FUNCTION__,
 936               _mesa_lookup_enum_by_nr(rprim), hwprim);
 937
 938    intel->vtbl.reduced_primitive_state(intel, rprim);
 939
 940    /* Start a new primitive.  Arrange to have it flushed later on.
 941     */
 942    if (hwprim != intel->prim.primitive) {
 943       INTEL_FIREVERTICES(intel);
 944
 945       intelStartInlinePrimitive(intel, hwprim, INTEL_BATCH_CLIPRECTS);
 946    }
 947 }
 948
 949
 950  /*
 951   */
 952 static void
 953 intelRenderPrimitive(GLcontext * ctx, GLenum prim)
 954 {
 955    struct intel_context *intel = intel_context(ctx);
 956
 957    if (0)
 958       fprintf(stderr, "%s %s\n", __FUNCTION__, _mesa_lookup_enum_by_nr(prim));
 959
 960    /* Let some clipping routines know which primitive they're dealing
 961     * with.
 962     */
 963    intel->render_primitive = prim;
 964
 965    /* Shortcircuit this when called from t_dd_rendertmp.h for unfilled
 966     * triangles.  The rasterized primitive will always be reset by
 967     * lower level functions in that case, potentially pingponging the
 968     * state:
 969     */
 970    if (reduced_prim[prim] == GL_TRIANGLES &&
 971        (ctx->_TriangleCaps & DD_TRI_UNFILLED))
 972       return;
 973
 974    /* Set some primitive-dependent state and Start? a new primitive.
 975     */
 976    intelRasterPrimitive(ctx, reduced_prim[prim], hw_prim[prim]);
 977 }
 978
 979
 980  /**********************************************************************/
 981  /*           Transition to/from hardware rasterization.               */
 982  /**********************************************************************/
 983
 984 static char *fallbackStrings[] = {
 985    [0] = "Draw buffer",
 986    [1] = "Read buffer",
 987    [2] = "Depth buffer",
 988    [3] = "Stencil buffer",
 989    [4] = "User disable",
 990    [5] = "Render mode",
 991
 992    [12] = "Texture",
 993    [13] = "Color mask",
 994    [14] = "Stencil",
 995    [15] = "Stipple",
 996    [16] = "Program",
 997    [17] = "Logic op",
 998    [18] = "Smooth polygon",
 999    [19] = "Smooth point",
1000 };
1001
1002
1003 static char *
1004 getFallbackString(GLuint bit)
1005 {
1006    int i = 0;
1007    while (bit > 1) {
1008       i++;
1009       bit >>= 1;
1010    }
1011    return fallbackStrings[i];
1012 }
1013
1014
1015
1016 void
1017 intelFallback(struct intel_context *intel, GLuint bit, GLboolean mode)
1018 {
1019    GLcontext *ctx = &intel->ctx;
1020    TNLcontext *tnl = TNL_CONTEXT(ctx);
1021    GLuint oldfallback = intel->Fallback;
1022
1023    if (mode) {
1024       intel->Fallback |= bit;
1025       if (oldfallback == 0) {
1026          intelFlush(ctx);
1027          if (INTEL_DEBUG & DEBUG_FALLBACKS)
1028             fprintf(stderr, "ENTER FALLBACK %x: %s\n",
1029                     bit, getFallbackString(bit));
1030          _swsetup_Wakeup(ctx);
1031          intel->RenderIndex = ~0;
1032       }
1033    }
1034    else {
1035       intel->Fallback &= ~bit;
1036       if (oldfallback == bit) {
1037          _swrast_flush(ctx);
1038          if (INTEL_DEBUG & DEBUG_FALLBACKS)
1039             fprintf(stderr, "LEAVE FALLBACK %s\n", getFallbackString(bit));
1040          tnl->Driver.Render.Start = intelRenderStart;
1041          tnl->Driver.Render.PrimitiveNotify = intelRenderPrimitive;
1042          tnl->Driver.Render.Finish = intelRenderFinish;
1043          tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
1044          tnl->Driver.Render.CopyPV = _tnl_copy_pv;
1045          tnl->Driver.Render.Interp = _tnl_interp;
1046
1047          _tnl_invalidate_vertex_state(ctx, ~0);
1048          _tnl_invalidate_vertices(ctx, ~0);
1049          _tnl_install_attrs(ctx,
1050                             intel->vertex_attrs,
1051                             intel->vertex_attr_count,
1052                             intel->ViewportMatrix.m, 0);
1053
1054          intel->NewGLState |= _INTEL_NEW_RENDERSTATE;
1055       }
1056    }
1057 }
1058
1059 union fi
1060 {
1061    GLfloat f;
1062    GLint i;
1063 };
1064
1065
1066 /**********************************************************************/
1067 /*             Used only with the metaops callbacks.                  */
1068 /**********************************************************************/
1069 static void
1070 intel_meta_draw_poly(struct intel_context *intel,
1071                      GLuint n,
1072                      GLfloat xy[][2],
1073                      GLfloat z, GLuint color, GLfloat tex[][2])
1074 {
1075    union fi *vb;
1076    GLint i;
1077    GLboolean was_locked = intel->locked;
1078
1079    if (!was_locked)
1080        LOCK_HARDWARE(intel);
1081
1082    /* All 3d primitives should be emitted with INTEL_BATCH_CLIPRECTS,
1083     * otherwise the drawing origin (DR4) might not be set correctly.
1084     */
1085    intelStartInlinePrimitive(intel, PRIM3D_TRIFAN, INTEL_BATCH_CLIPRECTS);
1086    vb = (union fi *) intelExtendInlinePrimitive(intel, n * 6);
1087
1088    for (i = 0; i < n; i++) {
1089       vb[0].f = xy[i][0];
1090       vb[1].f = xy[i][1];
1091       vb[2].f = z;
1092       vb[3].i = color;
1093       vb[4].f = tex[i][0];
1094       vb[5].f = tex[i][1];
1095       vb += 6;
1096    }
1097
1098    INTEL_FIREVERTICES(intel);
1099
1100    if (!was_locked)
1101        UNLOCK_HARDWARE(intel);
1102 }
1103
1104 static void
1105 intel_meta_draw_quad(struct intel_context *intel,
1106                      GLfloat x0, GLfloat x1,
1107                      GLfloat y0, GLfloat y1,
1108                      GLfloat z,
1109                      GLuint color,
1110                      GLfloat s0, GLfloat s1, GLfloat t0, GLfloat t1)
1111 {
1112    GLfloat xy[4][2];
1113    GLfloat tex[4][2];
1114
1115    xy[0][0] = x0;
1116    xy[0][1] = y0;
1117    xy[1][0] = x1;
1118    xy[1][1] = y0;
1119    xy[2][0] = x1;
1120    xy[2][1] = y1;
1121    xy[3][0] = x0;
1122    xy[3][1] = y1;
1123
1124    tex[0][0] = s0;
1125    tex[0][1] = t0;
1126    tex[1][0] = s1;
1127    tex[1][1] = t0;
1128    tex[2][0] = s1;
1129    tex[2][1] = t1;
1130    tex[3][0] = s0;
1131    tex[3][1] = t1;
1132
1133    intel_meta_draw_poly(intel, 4, xy, z, color, tex);
1134 }
1135
1136
1137
1138 /**********************************************************************/
1139 /*                            Initialization.                         */
1140 /**********************************************************************/
1141
1142
1143 void
1144 intelInitTriFuncs(GLcontext * ctx)
1145 {
1146    struct intel_context *intel = intel_context(ctx);
1147    TNLcontext *tnl = TNL_CONTEXT(ctx);
1148    static int firsttime = 1;
1149
1150    if (firsttime) {
1151       init_rast_tab();
1152       firsttime = 0;
1153    }
1154
1155    tnl->Driver.RunPipeline = intelRunPipeline;
1156    tnl->Driver.Render.Start = intelRenderStart;
1157    tnl->Driver.Render.Finish = intelRenderFinish;
1158    tnl->Driver.Render.PrimitiveNotify = intelRenderPrimitive;
1159    tnl->Driver.Render.ResetLineStipple = _swrast_ResetLineStipple;
1160    tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
1161    tnl->Driver.Render.CopyPV = _tnl_copy_pv;
1162    tnl->Driver.Render.Interp = _tnl_interp;
1163
1164    intel->vtbl.meta_draw_quad = intel_meta_draw_quad;
1165 }