src/mesa/drivers/dri/i915/intel_tris.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 VMware, Inc.
   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
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   9  * without limitation the rights to use, copy, modify, merge, publish,
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  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 VMWARE 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 /** @file intel_tris.c
  29  *
  30  * This file contains functions for managing the vertex buffer and emitting
  31  * primitives into it.
  32  */
  33
  34 #include "main/glheader.h"
  35 #include "main/context.h"
  36 #include "main/macros.h"
  37 #include "main/enums.h"
  38 #include "main/texobj.h"
  39 #include "main/state.h"
  40 #include "main/dd.h"
  41 #include "main/fbobject.h"
  42
  43 #include "swrast/swrast.h"
  44 #include "swrast_setup/swrast_setup.h"
  45 #include "tnl/t_context.h"
  46 #include "tnl/t_pipeline.h"
  47 #include "tnl/t_vertex.h"
  48
  49 #include "intel_screen.h"
  50 #include "intel_context.h"
  51 #include "intel_tris.h"
  52 #include "intel_batchbuffer.h"
  53 #include "intel_buffers.h"
  54 #include "intel_reg.h"
  55 #include "i830_context.h"
  56 #include "i830_reg.h"
  57 #include "i915_context.h"
  58
  59 static void intelRenderPrimitive(struct gl_context * ctx, GLenum prim);
  60 static void intelRasterPrimitive(struct gl_context * ctx, GLenum rprim,
  61                                  GLuint hwprim);
  62
  63 static void
  64 intel_flush_inline_primitive(struct intel_context *intel)
  65 {
  66    GLuint used = intel->batch.used - intel->prim.start_ptr;
  67
  68    assert(intel->prim.primitive != ~0);
  69
  70 /*    printf("/\n"); */
  71
  72    if (used < 2)
  73       goto do_discard;
  74
  75    intel->batch.map[intel->prim.start_ptr] =
  76       _3DPRIMITIVE | intel->prim.primitive | (used - 2);
  77
  78    goto finished;
  79
  80  do_discard:
  81    intel->batch.used = intel->prim.start_ptr;
  82
  83  finished:
  84    intel->prim.primitive = ~0;
  85    intel->prim.start_ptr = 0;
  86    intel->prim.flush = 0;
  87 }
  88
  89 static void intel_start_inline(struct intel_context *intel, uint32_t prim)
  90 {
  91    BATCH_LOCALS;
  92
  93    intel->vtbl.emit_state(intel);
  94
  95    intel->no_batch_wrap = true;
  96
  97    /* Emit a slot which will be filled with the inline primitive
  98     * command later.
  99     */
 100    BEGIN_BATCH(1);
 101
 102    intel->prim.start_ptr = intel->batch.used;
 103    intel->prim.primitive = prim;
 104    intel->prim.flush = intel_flush_inline_primitive;
 105
 106    OUT_BATCH(0);
 107    ADVANCE_BATCH();
 108
 109    intel->no_batch_wrap = false;
 110 /*    printf(">"); */
 111 }
 112
 113 static void intel_wrap_inline(struct intel_context *intel)
 114 {
 115    GLuint prim = intel->prim.primitive;
 116
 117    intel_flush_inline_primitive(intel);
 118    intel_batchbuffer_flush(intel);
 119    intel_start_inline(intel, prim);  /* ??? */
 120 }
 121
 122 static GLuint *intel_extend_inline(struct intel_context *intel, GLuint dwords)
 123 {
 124    GLuint *ptr;
 125
 126    assert(intel->prim.flush == intel_flush_inline_primitive);
 127
 128    if (intel_batchbuffer_space(intel) < dwords * sizeof(GLuint))
 129       intel_wrap_inline(intel);
 130
 131 /*    printf("."); */
 132
 133    intel->vtbl.assert_not_dirty(intel);
 134
 135    ptr = intel->batch.map + intel->batch.used;
 136    intel->batch.used += dwords;
 137
 138    return ptr;
 139 }
 140
 141 /** Sets the primitive type for a primitive sequence, flushing as needed. */
 142 void intel_set_prim(struct intel_context *intel, uint32_t prim)
 143 {
 144    /* if we have no VBOs */
 145
 146    if (intel->intelScreen->no_vbo) {
 147       intel_start_inline(intel, prim);
 148       return;
 149    }
 150    if (prim != intel->prim.primitive) {
 151       INTEL_FIREVERTICES(intel);
 152       intel->prim.primitive = prim;
 153    }
 154 }
 155
 156 /** Returns mapped VB space for the given number of vertices */
 157 uint32_t *intel_get_prim_space(struct intel_context *intel, unsigned int count)
 158 {
 159    uint32_t *addr;
 160
 161    if (intel->intelScreen->no_vbo) {
 162       return intel_extend_inline(intel, count * intel->vertex_size);
 163    }
 164
 165    /* Check for space in the existing VB */
 166    if (intel->prim.vb_bo == NULL ||
 167        (intel->prim.current_offset +
 168         count * intel->vertex_size * 4) > INTEL_VB_SIZE ||
 169        (intel->prim.count + count) >= (1 << 16)) {
 170       /* Flush existing prim if any */
 171       INTEL_FIREVERTICES(intel);
 172
 173       intel_finish_vb(intel);
 174
 175       /* Start a new VB */
 176       if (intel->prim.vb == NULL)
 177          intel->prim.vb = malloc(INTEL_VB_SIZE);
 178       intel->prim.vb_bo = drm_intel_bo_alloc(intel->bufmgr, "vb",
 179                                              INTEL_VB_SIZE, 4);
 180       intel->prim.start_offset = 0;
 181       intel->prim.current_offset = 0;
 182    }
 183
 184    intel->prim.flush = intel_flush_prim;
 185
 186    addr = (uint32_t *)(intel->prim.vb + intel->prim.current_offset);
 187    intel->prim.current_offset += intel->vertex_size * 4 * count;
 188    intel->prim.count += count;
 189
 190    return addr;
 191 }
 192
 193 /** Dispatches the accumulated primitive to the batchbuffer. */
 194 void intel_flush_prim(struct intel_context *intel)
 195 {
 196    drm_intel_bo *aper_array[2];
 197    drm_intel_bo *vb_bo;
 198    unsigned int offset, count;
 199    BATCH_LOCALS;
 200
 201    /* Must be called after an intel_start_prim. */
 202    assert(intel->prim.primitive != ~0);
 203
 204    if (intel->prim.count == 0)
 205       return;
 206
 207    /* Clear the current prims out of the context state so that a batch flush
 208     * flush triggered by emit_state doesn't loop back to flush_prim again.
 209     */
 210    vb_bo = intel->prim.vb_bo;
 211    drm_intel_bo_reference(vb_bo);
 212    count = intel->prim.count;
 213    intel->prim.count = 0;
 214    offset = intel->prim.start_offset;
 215    intel->prim.start_offset = intel->prim.current_offset;
 216    if (intel->gen < 3)
 217       intel->prim.current_offset = intel->prim.start_offset = ALIGN(intel->prim.start_offset, 128);
 218    intel->prim.flush = NULL;
 219
 220    intel->vtbl.emit_state(intel);
 221
 222    aper_array[0] = intel->batch.bo;
 223    aper_array[1] = vb_bo;
 224    if (dri_bufmgr_check_aperture_space(aper_array, 2)) {
 225       intel_batchbuffer_flush(intel);
 226       intel->vtbl.emit_state(intel);
 227    }
 228
 229    /* Ensure that we don't start a new batch for the following emit, which
 230     * depends on the state just emitted. emit_state should be making sure we
 231     * have the space for this.
 232     */
 233    intel->no_batch_wrap = true;
 234
 235    if (intel->always_flush_cache) {
 236       intel_batchbuffer_emit_mi_flush(intel);
 237    }
 238
 239 #if 0
 240    printf("emitting %d..%d=%d vertices size %d\n", offset,
 241           intel->prim.current_offset, count,
 242           intel->vertex_size * 4);
 243 #endif
 244
 245    if (intel->gen >= 3) {
 246       struct i915_context *i915 = i915_context(&intel->ctx);
 247       unsigned int cmd = 0, len = 0;
 248
 249       if (vb_bo != i915->current_vb_bo) {
 250          cmd |= I1_LOAD_S(0);
 251          len++;
 252       }
 253
 254       if (intel->vertex_size != i915->current_vertex_size) {
 255          cmd |= I1_LOAD_S(1);
 256          len++;
 257       }
 258       if (len)
 259          len++;
 260
 261       BEGIN_BATCH(2+len);
 262       if (cmd)
 263          OUT_BATCH(_3DSTATE_LOAD_STATE_IMMEDIATE_1 | cmd | (len - 2));
 264       if (vb_bo != i915->current_vb_bo) {
 265          OUT_RELOC(vb_bo, I915_GEM_DOMAIN_VERTEX, 0, 0);
 266          i915->current_vb_bo = vb_bo;
 267       }
 268       if (intel->vertex_size != i915->current_vertex_size) {
 269          OUT_BATCH((intel->vertex_size << S1_VERTEX_WIDTH_SHIFT) |
 270                    (intel->vertex_size << S1_VERTEX_PITCH_SHIFT));
 271          i915->current_vertex_size = intel->vertex_size;
 272       }
 273       OUT_BATCH(_3DPRIMITIVE |
 274                 PRIM_INDIRECT |
 275                 PRIM_INDIRECT_SEQUENTIAL |
 276                 intel->prim.primitive |
 277                 count);
 278       OUT_BATCH(offset / (intel->vertex_size * 4));
 279       ADVANCE_BATCH();
 280    } else {
 281       struct i830_context *i830 = i830_context(&intel->ctx);
 282
 283       BEGIN_BATCH(5);
 284       OUT_BATCH(_3DSTATE_LOAD_STATE_IMMEDIATE_1 |
 285                 I1_LOAD_S(0) | I1_LOAD_S(2) | 1);
 286       /* S0 */
 287       assert((offset & ~S0_VB_OFFSET_MASK_830) == 0);
 288       OUT_RELOC(vb_bo, I915_GEM_DOMAIN_VERTEX, 0,
 289                 offset | (intel->vertex_size << S0_VB_PITCH_SHIFT_830) |
 290                 S0_VB_ENABLE_830);
 291       /* S2
 292        * This is somewhat unfortunate -- VB width is tied up with
 293        * vertex format data that we've already uploaded through
 294        * _3DSTATE_VFT[01]_CMD.  We may want to replace emits of VFT state with
 295        * STATE_IMMEDIATE_1 like this to avoid duplication.
 296        */
 297       OUT_BATCH((i830->state.Ctx[I830_CTXREG_VF] & VFT0_TEX_COUNT_MASK) >>
 298                 VFT0_TEX_COUNT_SHIFT << S2_TEX_COUNT_SHIFT_830 |
 299                 (i830->state.Ctx[I830_CTXREG_VF2] << 16) |
 300                 intel->vertex_size << S2_VERTEX_0_WIDTH_SHIFT_830);
 301
 302       OUT_BATCH(_3DPRIMITIVE |
 303                 PRIM_INDIRECT |
 304                 PRIM_INDIRECT_SEQUENTIAL |
 305                 intel->prim.primitive |
 306                 count);
 307       OUT_BATCH(0); /* Beginning vertex index */
 308       ADVANCE_BATCH();
 309    }
 310
 311    if (intel->always_flush_cache) {
 312       intel_batchbuffer_emit_mi_flush(intel);
 313    }
 314
 315    intel->no_batch_wrap = false;
 316
 317    drm_intel_bo_unreference(vb_bo);
 318 }
 319
 320 /**
 321  * Uploads the locally-accumulated VB into the buffer object.
 322  *
 323  * This avoids us thrashing the cachelines in and out as the buffer gets
 324  * filled, dispatched, then reused as the hardware completes rendering from it,
 325  * and also lets us clflush less if we dispatch with a partially-filled VB.
 326  *
 327  * This is called normally from get_space when we're finishing a BO, but also
 328  * at batch flush time so that we don't try accessing the contents of a
 329  * just-dispatched buffer.
 330  */
 331 void intel_finish_vb(struct intel_context *intel)
 332 {
 333    if (intel->prim.vb_bo == NULL)
 334       return;
 335
 336    drm_intel_bo_subdata(intel->prim.vb_bo, 0, intel->prim.start_offset,
 337                         intel->prim.vb);
 338    drm_intel_bo_unreference(intel->prim.vb_bo);
 339    intel->prim.vb_bo = NULL;
 340 }
 341
 342 /***********************************************************************
 343  *                    Emit primitives as inline vertices               *
 344  ***********************************************************************/
 345
 346 #ifdef __i386__
 347 #define COPY_DWORDS( j, vb, vertsize, v )                       \
 348 do {                                                            \
 349    int __tmp;                                                   \
 350    __asm__ __volatile__( "rep ; movsl"                          \
 351                          : "=%c" (j), "=D" (vb), "=S" (__tmp)   \
 352                          : "0" (vertsize),                      \
 353                          "D" ((long)vb),                        \
 354                          "S" ((long)v) );                       \
 355 } while (0)
 356 #else
 357 #define COPY_DWORDS( j, vb, vertsize, v )       \
 358 do {                                            \
 359    for ( j = 0 ; j < vertsize ; j++ ) {         \
 360       vb[j] = ((GLuint *)v)[j];                 \
 361    }                                            \
 362    vb += vertsize;                              \
 363 } while (0)
 364 #endif
 365
 366 static void
 367 intel_draw_quad(struct intel_context *intel,
 368                 intelVertexPtr v0,
 369                 intelVertexPtr v1, intelVertexPtr v2, intelVertexPtr v3)
 370 {
 371    GLuint vertsize = intel->vertex_size;
 372    GLuint *vb = intel_get_prim_space(intel, 6);
 373    int j;
 374
 375    COPY_DWORDS(j, vb, vertsize, v0);
 376    COPY_DWORDS(j, vb, vertsize, v1);
 377
 378    /* If smooth shading, draw like a trifan which gives better
 379     * rasterization.  Otherwise draw as two triangles with provoking
 380     * vertex in third position as required for flat shading.
 381     */
 382    if (intel->ctx.Light.ShadeModel == GL_FLAT) {
 383       COPY_DWORDS(j, vb, vertsize, v3);
 384       COPY_DWORDS(j, vb, vertsize, v1);
 385    }
 386    else {
 387       COPY_DWORDS(j, vb, vertsize, v2);
 388       COPY_DWORDS(j, vb, vertsize, v0);
 389    }
 390
 391    COPY_DWORDS(j, vb, vertsize, v2);
 392    COPY_DWORDS(j, vb, vertsize, v3);
 393 }
 394
 395 static void
 396 intel_draw_triangle(struct intel_context *intel,
 397                     intelVertexPtr v0, intelVertexPtr v1, intelVertexPtr v2)
 398 {
 399    GLuint vertsize = intel->vertex_size;
 400    GLuint *vb = intel_get_prim_space(intel, 3);
 401    int j;
 402
 403    COPY_DWORDS(j, vb, vertsize, v0);
 404    COPY_DWORDS(j, vb, vertsize, v1);
 405    COPY_DWORDS(j, vb, vertsize, v2);
 406 }
 407
 408
 409 static void
 410 intel_draw_line(struct intel_context *intel,
 411                 intelVertexPtr v0, intelVertexPtr v1)
 412 {
 413    GLuint vertsize = intel->vertex_size;
 414    GLuint *vb = intel_get_prim_space(intel, 2);
 415    int j;
 416
 417    COPY_DWORDS(j, vb, vertsize, v0);
 418    COPY_DWORDS(j, vb, vertsize, v1);
 419 }
 420
 421
 422 static void
 423 intel_draw_point(struct intel_context *intel, intelVertexPtr v0)
 424 {
 425    GLuint vertsize = intel->vertex_size;
 426    GLuint *vb = intel_get_prim_space(intel, 1);
 427    int j;
 428
 429    /* Adjust for sub pixel position -- still required for conform. */
 430    *(float *) &vb[0] = v0->v.x;
 431    *(float *) &vb[1] = v0->v.y;
 432    for (j = 2; j < vertsize; j++)
 433       vb[j] = v0->ui[j];
 434 }
 435
 436
 437
 438 /***********************************************************************
 439  *                Fixup for ARB_point_parameters                       *
 440  ***********************************************************************/
 441
 442 /* Currently not working - VERT_ATTRIB_POINTSIZE isn't correctly
 443  * represented in the fragment program InputsRead field.
 444  */
 445 static void
 446 intel_atten_point(struct intel_context *intel, intelVertexPtr v0)
 447 {
 448    struct gl_context *ctx = &intel->ctx;
 449    GLfloat psz[4], col[4], restore_psz, restore_alpha;
 450
 451    _tnl_get_attr(ctx, v0, _TNL_ATTRIB_POINTSIZE, psz);
 452    _tnl_get_attr(ctx, v0, _TNL_ATTRIB_COLOR0, col);
 453
 454    restore_psz = psz[0];
 455    restore_alpha = col[3];
 456
 457    if (psz[0] >= ctx->Point.Threshold) {
 458       psz[0] = MIN2(psz[0], ctx->Point.MaxSize);
 459    }
 460    else {
 461       GLfloat dsize = psz[0] / ctx->Point.Threshold;
 462       psz[0] = MAX2(ctx->Point.Threshold, ctx->Point.MinSize);
 463       col[3] *= dsize * dsize;
 464    }
 465
 466    if (psz[0] < 1.0)
 467       psz[0] = 1.0;
 468
 469    if (restore_psz != psz[0] || restore_alpha != col[3]) {
 470       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_POINTSIZE, psz);
 471       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_COLOR0, col);
 472
 473       intel_draw_point(intel, v0);
 474
 475       psz[0] = restore_psz;
 476       col[3] = restore_alpha;
 477
 478       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_POINTSIZE, psz);
 479       _tnl_set_attr(ctx, v0, _TNL_ATTRIB_COLOR0, col);
 480    }
 481    else
 482       intel_draw_point(intel, v0);
 483 }
 484
 485
 486
 487
 488
 489 /***********************************************************************
 490  *                Fixup for I915 WPOS texture coordinate                *
 491  ***********************************************************************/
 492
 493 static void
 494 intel_emit_fragcoord(struct intel_context *intel, intelVertexPtr v)
 495 {
 496    struct gl_context *ctx = &intel->ctx;
 497    struct gl_framebuffer *fb = ctx->DrawBuffer;
 498    GLuint offset = intel->wpos_offset;
 499    float *vertex_position = (float *)v;
 500    float *fragcoord = (float *)((char *)v + offset);
 501
 502    fragcoord[0] = vertex_position[0];
 503
 504    if (_mesa_is_user_fbo(fb))
 505       fragcoord[1] = vertex_position[1];
 506    else
 507       fragcoord[1] = fb->Height - vertex_position[1];
 508
 509    fragcoord[2] = vertex_position[2];
 510    fragcoord[3] = vertex_position[3];
 511 }
 512
 513 static void
 514 intel_wpos_triangle(struct intel_context *intel,
 515                     intelVertexPtr v0, intelVertexPtr v1, intelVertexPtr v2)
 516 {
 517    intel_emit_fragcoord(intel, v0);
 518    intel_emit_fragcoord(intel, v1);
 519    intel_emit_fragcoord(intel, v2);
 520
 521    intel_draw_triangle(intel, v0, v1, v2);
 522 }
 523
 524
 525 static void
 526 intel_wpos_line(struct intel_context *intel,
 527                 intelVertexPtr v0, intelVertexPtr v1)
 528 {
 529    intel_emit_fragcoord(intel, v0);
 530    intel_emit_fragcoord(intel, v1);
 531    intel_draw_line(intel, v0, v1);
 532 }
 533
 534
 535 static void
 536 intel_wpos_point(struct intel_context *intel, intelVertexPtr v0)
 537 {
 538    intel_emit_fragcoord(intel, v0);
 539    intel_draw_point(intel, v0);
 540 }
 541
 542
 543
 544
 545
 546
 547 /***********************************************************************
 548  *          Macros for t_dd_tritmp.h to draw basic primitives          *
 549  ***********************************************************************/
 550
 551 #define TRI( a, b, c )                          \
 552 do {                                            \
 553    if (DO_FALLBACK)                             \
 554       intel->draw_tri( intel, a, b, c );        \
 555    else                                         \
 556       intel_draw_triangle( intel, a, b, c );    \
 557 } while (0)
 558
 559 #define QUAD( a, b, c, d )                      \
 560 do {                                            \
 561    if (DO_FALLBACK) {                           \
 562       intel->draw_tri( intel, a, b, d );        \
 563       intel->draw_tri( intel, b, c, d );        \
 564    } else                                       \
 565       intel_draw_quad( intel, a, b, c, d );     \
 566 } while (0)
 567
 568 #define LINE( v0, v1 )                          \
 569 do {                                            \
 570    if (DO_FALLBACK)                             \
 571       intel->draw_line( intel, v0, v1 );        \
 572    else                                         \
 573       intel_draw_line( intel, v0, v1 );         \
 574 } while (0)
 575
 576 #define POINT( v0 )                             \
 577 do {                                            \
 578    if (DO_FALLBACK)                             \
 579       intel->draw_point( intel, v0 );           \
 580    else                                         \
 581       intel_draw_point( intel, v0 );            \
 582 } while (0)
 583
 584
 585 /***********************************************************************
 586  *              Build render functions from dd templates               *
 587  ***********************************************************************/
 588
 589 #define INTEL_OFFSET_BIT        0x01
 590 #define INTEL_TWOSIDE_BIT       0x02
 591 #define INTEL_UNFILLED_BIT      0x04
 592 #define INTEL_FALLBACK_BIT      0x08
 593 #define INTEL_MAX_TRIFUNC       0x10
 594
 595
 596 static struct
 597 {
 598    tnl_points_func points;
 599    tnl_line_func line;
 600    tnl_triangle_func triangle;
 601    tnl_quad_func quad;
 602 } rast_tab[INTEL_MAX_TRIFUNC];
 603
 604
 605 #define DO_FALLBACK (IND & INTEL_FALLBACK_BIT)
 606 #define DO_OFFSET   (IND & INTEL_OFFSET_BIT)
 607 #define DO_UNFILLED (IND & INTEL_UNFILLED_BIT)
 608 #define DO_TWOSIDE  (IND & INTEL_TWOSIDE_BIT)
 609 #define DO_FLAT      0
 610 #define DO_TRI       1
 611 #define DO_QUAD      1
 612 #define DO_LINE      1
 613 #define DO_POINTS    1
 614 #define DO_FULL_QUAD 1
 615
 616 #define HAVE_SPEC         1
 617 #define HAVE_BACK_COLORS  0
 618 #define HAVE_HW_FLATSHADE 1
 619 #define VERTEX            intelVertex
 620 #define TAB               rast_tab
 621
 622 /* Only used to pull back colors into vertices (ie, we know color is
 623  * floating point).
 624  */
 625 #define INTEL_COLOR( dst, src )                         \
 626 do {                                                    \
 627    UNCLAMPED_FLOAT_TO_UBYTE((dst)[0], (src)[2]);        \
 628    UNCLAMPED_FLOAT_TO_UBYTE((dst)[1], (src)[1]);        \
 629    UNCLAMPED_FLOAT_TO_UBYTE((dst)[2], (src)[0]);        \
 630    UNCLAMPED_FLOAT_TO_UBYTE((dst)[3], (src)[3]);        \
 631 } while (0)
 632
 633 #define INTEL_SPEC( dst, src )                          \
 634 do {                                                    \
 635    UNCLAMPED_FLOAT_TO_UBYTE((dst)[0], (src)[2]);        \
 636    UNCLAMPED_FLOAT_TO_UBYTE((dst)[1], (src)[1]);        \
 637    UNCLAMPED_FLOAT_TO_UBYTE((dst)[2], (src)[0]);        \
 638 } while (0)
 639
 640
 641 #define DEPTH_SCALE (ctx->DrawBuffer->Visual.depthBits == 16 ? 1.0 : 2.0)
 642 #define UNFILLED_TRI unfilled_tri
 643 #define UNFILLED_QUAD unfilled_quad
 644 #define VERT_X(_v) _v->v.x
 645 #define VERT_Y(_v) _v->v.y
 646 #define VERT_Z(_v) _v->v.z
 647 #define AREA_IS_CCW( a ) (a > 0)
 648 #define GET_VERTEX(e) (intel->verts + (e * intel->vertex_size * sizeof(GLuint)))
 649
 650 #define VERT_SET_RGBA( v, c )    if (coloroffset) INTEL_COLOR( v->ub4[coloroffset], c )
 651 #define VERT_COPY_RGBA( v0, v1 ) if (coloroffset) v0->ui[coloroffset] = v1->ui[coloroffset]
 652 #define VERT_SAVE_RGBA( idx )    if (coloroffset) color[idx] = v[idx]->ui[coloroffset]
 653 #define VERT_RESTORE_RGBA( idx ) if (coloroffset) v[idx]->ui[coloroffset] = color[idx]
 654
 655 #define VERT_SET_SPEC( v, c )    if (specoffset) INTEL_SPEC( v->ub4[specoffset], c )
 656 #define VERT_COPY_SPEC( v0, v1 ) if (specoffset) COPY_3V(v0->ub4[specoffset], v1->ub4[specoffset])
 657 #define VERT_SAVE_SPEC( idx )    if (specoffset) spec[idx] = v[idx]->ui[specoffset]
 658 #define VERT_RESTORE_SPEC( idx ) if (specoffset) v[idx]->ui[specoffset] = spec[idx]
 659
 660 #define LOCAL_VARS(n)                                                   \
 661    struct intel_context *intel = intel_context(ctx);                    \
 662    GLuint color[n] = { 0, }, spec[n] = { 0, };                          \
 663    GLuint coloroffset = intel->coloroffset;                             \
 664    GLuint specoffset = intel->specoffset;                               \
 665    (void) color; (void) spec; (void) coloroffset; (void) specoffset;
 666
 667
 668 /***********************************************************************
 669  *                Helpers for rendering unfilled primitives            *
 670  ***********************************************************************/
 671
 672 static const GLuint hw_prim[GL_POLYGON + 1] = {
 673    PRIM3D_POINTLIST,
 674    PRIM3D_LINELIST,
 675    PRIM3D_LINELIST,
 676    PRIM3D_LINELIST,
 677    PRIM3D_TRILIST,
 678    PRIM3D_TRILIST,
 679    PRIM3D_TRILIST,
 680    PRIM3D_TRILIST,
 681    PRIM3D_TRILIST,
 682    PRIM3D_TRILIST
 683 };
 684
 685 #define RASTERIZE(x) intelRasterPrimitive( ctx, x, hw_prim[x] )
 686 #define RENDER_PRIMITIVE intel->render_primitive
 687 #define TAG(x) x
 688 #define IND INTEL_FALLBACK_BIT
 689 #include "tnl_dd/t_dd_unfilled.h"
 690 #undef IND
 691
 692 /***********************************************************************
 693  *                      Generate GL render functions                   *
 694  ***********************************************************************/
 695
 696 #define IND (0)
 697 #define TAG(x) x
 698 #include "tnl_dd/t_dd_tritmp.h"
 699
 700 #define IND (INTEL_OFFSET_BIT)
 701 #define TAG(x) x##_offset
 702 #include "tnl_dd/t_dd_tritmp.h"
 703
 704 #define IND (INTEL_TWOSIDE_BIT)
 705 #define TAG(x) x##_twoside
 706 #include "tnl_dd/t_dd_tritmp.h"
 707
 708 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT)
 709 #define TAG(x) x##_twoside_offset
 710 #include "tnl_dd/t_dd_tritmp.h"
 711
 712 #define IND (INTEL_UNFILLED_BIT)
 713 #define TAG(x) x##_unfilled
 714 #include "tnl_dd/t_dd_tritmp.h"
 715
 716 #define IND (INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT)
 717 #define TAG(x) x##_offset_unfilled
 718 #include "tnl_dd/t_dd_tritmp.h"
 719
 720 #define IND (INTEL_TWOSIDE_BIT|INTEL_UNFILLED_BIT)
 721 #define TAG(x) x##_twoside_unfilled
 722 #include "tnl_dd/t_dd_tritmp.h"
 723
 724 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT)
 725 #define TAG(x) x##_twoside_offset_unfilled
 726 #include "tnl_dd/t_dd_tritmp.h"
 727
 728 #define IND (INTEL_FALLBACK_BIT)
 729 #define TAG(x) x##_fallback
 730 #include "tnl_dd/t_dd_tritmp.h"
 731
 732 #define IND (INTEL_OFFSET_BIT|INTEL_FALLBACK_BIT)
 733 #define TAG(x) x##_offset_fallback
 734 #include "tnl_dd/t_dd_tritmp.h"
 735
 736 #define IND (INTEL_TWOSIDE_BIT|INTEL_FALLBACK_BIT)
 737 #define TAG(x) x##_twoside_fallback
 738 #include "tnl_dd/t_dd_tritmp.h"
 739
 740 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT|INTEL_FALLBACK_BIT)
 741 #define TAG(x) x##_twoside_offset_fallback
 742 #include "tnl_dd/t_dd_tritmp.h"
 743
 744 #define IND (INTEL_UNFILLED_BIT|INTEL_FALLBACK_BIT)
 745 #define TAG(x) x##_unfilled_fallback
 746 #include "tnl_dd/t_dd_tritmp.h"
 747
 748 #define IND (INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT|INTEL_FALLBACK_BIT)
 749 #define TAG(x) x##_offset_unfilled_fallback
 750 #include "tnl_dd/t_dd_tritmp.h"
 751
 752 #define IND (INTEL_TWOSIDE_BIT|INTEL_UNFILLED_BIT|INTEL_FALLBACK_BIT)
 753 #define TAG(x) x##_twoside_unfilled_fallback
 754 #include "tnl_dd/t_dd_tritmp.h"
 755
 756 #define IND (INTEL_TWOSIDE_BIT|INTEL_OFFSET_BIT|INTEL_UNFILLED_BIT| \
 757              INTEL_FALLBACK_BIT)
 758 #define TAG(x) x##_twoside_offset_unfilled_fallback
 759 #include "tnl_dd/t_dd_tritmp.h"
 760
 761
 762 static void
 763 init_rast_tab(void)
 764 {
 765    init();
 766    init_offset();
 767    init_twoside();
 768    init_twoside_offset();
 769    init_unfilled();
 770    init_offset_unfilled();
 771    init_twoside_unfilled();
 772    init_twoside_offset_unfilled();
 773    init_fallback();
 774    init_offset_fallback();
 775    init_twoside_fallback();
 776    init_twoside_offset_fallback();
 777    init_unfilled_fallback();
 778    init_offset_unfilled_fallback();
 779    init_twoside_unfilled_fallback();
 780    init_twoside_offset_unfilled_fallback();
 781 }
 782
 783
 784 /***********************************************************************
 785  *                    Rasterization fallback helpers                   *
 786  ***********************************************************************/
 787
 788
 789 /* This code is hit only when a mix of accelerated and unaccelerated
 790  * primitives are being drawn, and only for the unaccelerated
 791  * primitives.
 792  */
 793 static void
 794 intel_fallback_tri(struct intel_context *intel,
 795                    intelVertex * v0, intelVertex * v1, intelVertex * v2)
 796 {
 797    struct gl_context *ctx = &intel->ctx;
 798    SWvertex v[3];
 799
 800    if (0)
 801       fprintf(stderr, "\n%s\n", __FUNCTION__);
 802
 803    INTEL_FIREVERTICES(intel);
 804
 805    _swsetup_Translate(ctx, v0, &v[0]);
 806    _swsetup_Translate(ctx, v1, &v[1]);
 807    _swsetup_Translate(ctx, v2, &v[2]);
 808    _swrast_render_start(ctx);
 809    _swrast_Triangle(ctx, &v[0], &v[1], &v[2]);
 810    _swrast_render_finish(ctx);
 811 }
 812
 813
 814 static void
 815 intel_fallback_line(struct intel_context *intel,
 816                     intelVertex * v0, intelVertex * v1)
 817 {
 818    struct gl_context *ctx = &intel->ctx;
 819    SWvertex v[2];
 820
 821    if (0)
 822       fprintf(stderr, "\n%s\n", __FUNCTION__);
 823
 824    INTEL_FIREVERTICES(intel);
 825
 826    _swsetup_Translate(ctx, v0, &v[0]);
 827    _swsetup_Translate(ctx, v1, &v[1]);
 828    _swrast_render_start(ctx);
 829    _swrast_Line(ctx, &v[0], &v[1]);
 830    _swrast_render_finish(ctx);
 831 }
 832
 833 static void
 834 intel_fallback_point(struct intel_context *intel,
 835                      intelVertex * v0)
 836 {
 837    struct gl_context *ctx = &intel->ctx;
 838    SWvertex v[1];
 839
 840    if (0)
 841       fprintf(stderr, "\n%s\n", __FUNCTION__);
 842
 843    INTEL_FIREVERTICES(intel);
 844
 845    _swsetup_Translate(ctx, v0, &v[0]);
 846    _swrast_render_start(ctx);
 847    _swrast_Point(ctx, &v[0]);
 848    _swrast_render_finish(ctx);
 849 }
 850
 851
 852 /**********************************************************************/
 853 /*               Render unclipped begin/end objects                   */
 854 /**********************************************************************/
 855
 856 #define IND 0
 857 #define V(x) (intelVertex *)(vertptr + ((x)*vertsize*sizeof(GLuint)))
 858 #define RENDER_POINTS( start, count )   \
 859    for ( ; start < count ; start++) POINT( V(ELT(start)) );
 860 #define RENDER_LINE( v0, v1 )         LINE( V(v0), V(v1) )
 861 #define RENDER_TRI(  v0, v1, v2 )     TRI(  V(v0), V(v1), V(v2) )
 862 #define RENDER_QUAD( v0, v1, v2, v3 ) QUAD( V(v0), V(v1), V(v2), V(v3) )
 863 #define INIT(x) intelRenderPrimitive( ctx, x )
 864 #undef LOCAL_VARS
 865 #define LOCAL_VARS                                              \
 866     struct intel_context *intel = intel_context(ctx);                   \
 867     GLubyte *vertptr = (GLubyte *)intel->verts;                 \
 868     const GLuint vertsize = intel->vertex_size;         \
 869     const GLuint * const elt = TNL_CONTEXT(ctx)->vb.Elts;       \
 870     (void) elt;
 871 #define RESET_STIPPLE
 872 #define RESET_OCCLUSION
 873 #define PRESERVE_VB_DEFS
 874 #define ELT(x) x
 875 #define TAG(x) intel_##x##_verts
 876 #include "tnl/t_vb_rendertmp.h"
 877 #undef ELT
 878 #undef TAG
 879 #define TAG(x) intel_##x##_elts
 880 #define ELT(x) elt[x]
 881 #include "tnl/t_vb_rendertmp.h"
 882
 883 /**********************************************************************/
 884 /*                   Render clipped primitives                        */
 885 /**********************************************************************/
 886
 887
 888
 889 static void
 890 intelRenderClippedPoly(struct gl_context * ctx, const GLuint * elts, GLuint n)
 891 {
 892    struct intel_context *intel = intel_context(ctx);
 893    TNLcontext *tnl = TNL_CONTEXT(ctx);
 894    struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
 895    GLuint prim = intel->render_primitive;
 896
 897    /* Render the new vertices as an unclipped polygon.
 898     */
 899    {
 900       GLuint *tmp = VB->Elts;
 901       VB->Elts = (GLuint *) elts;
 902       tnl->Driver.Render.PrimTabElts[GL_POLYGON] (ctx, 0, n,
 903                                                   PRIM_BEGIN | PRIM_END);
 904       VB->Elts = tmp;
 905    }
 906
 907    /* Restore the render primitive
 908     */
 909    if (prim != GL_POLYGON)
 910       tnl->Driver.Render.PrimitiveNotify(ctx, prim);
 911 }
 912
 913 static void
 914 intelRenderClippedLine(struct gl_context * ctx, GLuint ii, GLuint jj)
 915 {
 916    TNLcontext *tnl = TNL_CONTEXT(ctx);
 917
 918    tnl->Driver.Render.Line(ctx, ii, jj);
 919 }
 920
 921 static void
 922 intelFastRenderClippedPoly(struct gl_context * ctx, const GLuint * elts, GLuint n)
 923 {
 924    struct intel_context *intel = intel_context(ctx);
 925    const GLuint vertsize = intel->vertex_size;
 926    GLuint *vb = intel_get_prim_space(intel, (n - 2) * 3);
 927    GLubyte *vertptr = (GLubyte *) intel->verts;
 928    const GLuint *start = (const GLuint *) V(elts[0]);
 929    int i, j;
 930
 931    for (i = 2; i < n; i++) {
 932       COPY_DWORDS(j, vb, vertsize, V(elts[i - 1]));
 933       COPY_DWORDS(j, vb, vertsize, V(elts[i]));
 934       COPY_DWORDS(j, vb, vertsize, start);
 935    }
 936 }
 937
 938 /**********************************************************************/
 939 /*                    Choose render functions                         */
 940 /**********************************************************************/
 941
 942
 943 #define DD_TRI_LIGHT_TWOSIDE (1 << 1)
 944 #define DD_TRI_UNFILLED (1 << 2)
 945 #define DD_TRI_STIPPLE  (1 << 4)
 946 #define DD_TRI_OFFSET   (1 << 5)
 947 #define DD_LINE_STIPPLE (1 << 7)
 948 #define DD_POINT_ATTEN  (1 << 9)
 949
 950 #define ANY_FALLBACK_FLAGS (DD_LINE_STIPPLE | DD_TRI_STIPPLE | DD_POINT_ATTEN)
 951 #define ANY_RASTER_FLAGS (DD_TRI_LIGHT_TWOSIDE | DD_TRI_OFFSET | DD_TRI_UNFILLED)
 952
 953 void
 954 intelChooseRenderState(struct gl_context * ctx)
 955 {
 956    TNLcontext *tnl = TNL_CONTEXT(ctx);
 957    struct intel_context *intel = intel_context(ctx);
 958    GLuint flags =
 959       ((ctx->Light.Enabled &&
 960         ctx->Light.Model.TwoSide) ? DD_TRI_LIGHT_TWOSIDE : 0) |
 961       ((ctx->Polygon.FrontMode != GL_FILL ||
 962         ctx->Polygon.BackMode != GL_FILL) ? DD_TRI_UNFILLED : 0) |
 963       (ctx->Polygon.StippleFlag ? DD_TRI_STIPPLE : 0) |
 964       ((ctx->Polygon.OffsetPoint ||
 965         ctx->Polygon.OffsetLine ||
 966         ctx->Polygon.OffsetFill) ? DD_TRI_OFFSET : 0) |
 967       (ctx->Line.StippleFlag ? DD_LINE_STIPPLE : 0) |
 968       (ctx->Point._Attenuated ? DD_POINT_ATTEN : 0);
 969    const struct gl_fragment_program *fprog = ctx->FragmentProgram._Current;
 970    bool have_wpos = (fprog && (fprog->Base.InputsRead & VARYING_BIT_POS));
 971    GLuint index = 0;
 972
 973    if (INTEL_DEBUG & DEBUG_STATE)
 974       fprintf(stderr, "\n%s\n", __FUNCTION__);
 975
 976    if ((flags & (ANY_FALLBACK_FLAGS | ANY_RASTER_FLAGS)) || have_wpos) {
 977
 978       if (flags & ANY_RASTER_FLAGS) {
 979          if (flags & DD_TRI_LIGHT_TWOSIDE)
 980             index |= INTEL_TWOSIDE_BIT;
 981          if (flags & DD_TRI_OFFSET)
 982             index |= INTEL_OFFSET_BIT;
 983          if (flags & DD_TRI_UNFILLED)
 984             index |= INTEL_UNFILLED_BIT;
 985       }
 986
 987       if (have_wpos) {
 988          intel->draw_point = intel_wpos_point;
 989          intel->draw_line = intel_wpos_line;
 990          intel->draw_tri = intel_wpos_triangle;
 991
 992          /* Make sure these get called:
 993           */
 994          index |= INTEL_FALLBACK_BIT;
 995       }
 996       else {
 997          intel->draw_point = intel_draw_point;
 998          intel->draw_line = intel_draw_line;
 999          intel->draw_tri = intel_draw_triangle;
1000       }
1001
1002       /* Hook in fallbacks for specific primitives.
1003        */
1004       if (flags & ANY_FALLBACK_FLAGS) {
1005          if (flags & DD_LINE_STIPPLE)
1006             intel->draw_line = intel_fallback_line;
1007
1008          if ((flags & DD_TRI_STIPPLE) && !intel->hw_stipple)
1009             intel->draw_tri = intel_fallback_tri;
1010
1011          if (flags & DD_POINT_ATTEN) {
1012             if (0)
1013                intel->draw_point = intel_atten_point;
1014             else
1015                intel->draw_point = intel_fallback_point;
1016          }
1017
1018          index |= INTEL_FALLBACK_BIT;
1019       }
1020    }
1021
1022    if (intel->RenderIndex != index) {
1023       intel->RenderIndex = index;
1024
1025       tnl->Driver.Render.Points = rast_tab[index].points;
1026       tnl->Driver.Render.Line = rast_tab[index].line;
1027       tnl->Driver.Render.Triangle = rast_tab[index].triangle;
1028       tnl->Driver.Render.Quad = rast_tab[index].quad;
1029
1030       if (index == 0) {
1031          tnl->Driver.Render.PrimTabVerts = intel_render_tab_verts;
1032          tnl->Driver.Render.PrimTabElts = intel_render_tab_elts;
1033          tnl->Driver.Render.ClippedLine = line; /* from tritmp.h */
1034          tnl->Driver.Render.ClippedPolygon = intelFastRenderClippedPoly;
1035       }
1036       else {
1037          tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
1038          tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
1039          tnl->Driver.Render.ClippedLine = intelRenderClippedLine;
1040          tnl->Driver.Render.ClippedPolygon = intelRenderClippedPoly;
1041       }
1042    }
1043 }
1044
1045 static const GLenum reduced_prim[GL_POLYGON + 1] = {
1046    GL_POINTS,
1047    GL_LINES,
1048    GL_LINES,
1049    GL_LINES,
1050    GL_TRIANGLES,
1051    GL_TRIANGLES,
1052    GL_TRIANGLES,
1053    GL_TRIANGLES,
1054    GL_TRIANGLES,
1055    GL_TRIANGLES
1056 };
1057
1058
1059 /**********************************************************************/
1060 /*                 High level hooks for t_vb_render.c                 */
1061 /**********************************************************************/
1062
1063
1064
1065
1066 static void
1067 intelRunPipeline(struct gl_context * ctx)
1068 {
1069    struct intel_context *intel = intel_context(ctx);
1070
1071    _mesa_lock_context_textures(ctx);
1072
1073    if (ctx->NewState)
1074       _mesa_update_state_locked(ctx);
1075
1076    /* We need to get this done before we start the pipeline, or a
1077     * change in the INTEL_FALLBACK() of its intel_draw_buffers() call
1078     * while the pipeline is running will result in mismatched swrast
1079     * map/unmaps, and later assertion failures.
1080     */
1081    intel_prepare_render(intel);
1082
1083    if (intel->NewGLState) {
1084       if (intel->NewGLState & _NEW_TEXTURE) {
1085          intel->vtbl.update_texture_state(intel);
1086       }
1087
1088       if (!intel->Fallback) {
1089          if (intel->NewGLState & _INTEL_NEW_RENDERSTATE)
1090             intelChooseRenderState(ctx);
1091       }
1092
1093       intel->NewGLState = 0;
1094    }
1095
1096    intel->tnl_pipeline_running = true;
1097    _tnl_run_pipeline(ctx);
1098    intel->tnl_pipeline_running = false;
1099
1100    _mesa_unlock_context_textures(ctx);
1101 }
1102
1103 static void
1104 intelRenderStart(struct gl_context * ctx)
1105 {
1106    struct intel_context *intel = intel_context(ctx);
1107
1108    intel_check_front_buffer_rendering(intel);
1109    intel->vtbl.render_start(intel_context(ctx));
1110    intel->vtbl.emit_state(intel);
1111 }
1112
1113 static void
1114 intelRenderFinish(struct gl_context * ctx)
1115 {
1116    struct intel_context *intel = intel_context(ctx);
1117
1118    if (intel->RenderIndex & INTEL_FALLBACK_BIT)
1119       _swrast_flush(ctx);
1120
1121    INTEL_FIREVERTICES(intel);
1122 }
1123
1124
1125
1126
1127  /* System to flush dma and emit state changes based on the rasterized
1128   * primitive.
1129   */
1130 static void
1131 intelRasterPrimitive(struct gl_context * ctx, GLenum rprim, GLuint hwprim)
1132 {
1133    struct intel_context *intel = intel_context(ctx);
1134
1135    if (0)
1136       fprintf(stderr, "%s %s %x\n", __FUNCTION__,
1137               _mesa_lookup_enum_by_nr(rprim), hwprim);
1138
1139    intel->vtbl.reduced_primitive_state(intel, rprim);
1140
1141    /* Start a new primitive.  Arrange to have it flushed later on.
1142     */
1143    if (hwprim != intel->prim.primitive) {
1144       INTEL_FIREVERTICES(intel);
1145
1146       intel_set_prim(intel, hwprim);
1147    }
1148 }
1149
1150
1151  /*
1152   */
1153 static void
1154 intelRenderPrimitive(struct gl_context * ctx, GLenum prim)
1155 {
1156    struct intel_context *intel = intel_context(ctx);
1157    GLboolean unfilled = (ctx->Polygon.FrontMode != GL_FILL ||
1158                          ctx->Polygon.BackMode != GL_FILL);
1159
1160    if (0)
1161       fprintf(stderr, "%s %s\n", __FUNCTION__, _mesa_lookup_enum_by_nr(prim));
1162
1163    /* Let some clipping routines know which primitive they're dealing
1164     * with.
1165     */
1166    intel->render_primitive = prim;
1167
1168    /* Shortcircuit this when called for unfilled triangles.  The rasterized
1169     * primitive will always be reset by lower level functions in that case,
1170     * potentially pingponging the state:
1171     */
1172    if (reduced_prim[prim] == GL_TRIANGLES && unfilled)
1173       return;
1174
1175    /* Set some primitive-dependent state and Start? a new primitive.
1176     */
1177    intelRasterPrimitive(ctx, reduced_prim[prim], hw_prim[prim]);
1178 }
1179
1180
1181  /**********************************************************************/
1182  /*           Transition to/from hardware rasterization.               */
1183  /**********************************************************************/
1184
1185 static char *fallbackStrings[] = {
1186    [0] = "Draw buffer",
1187    [1] = "Read buffer",
1188    [2] = "Depth buffer",
1189    [3] = "Stencil buffer",
1190    [4] = "User disable",
1191    [5] = "Render mode",
1192
1193    [12] = "Texture",
1194    [13] = "Color mask",
1195    [14] = "Stencil",
1196    [15] = "Stipple",
1197    [16] = "Program",
1198    [17] = "Logic op",
1199    [18] = "Smooth polygon",
1200    [19] = "Smooth point",
1201    [20] = "point sprite coord origin",
1202    [21] = "depth/color drawing offset",
1203    [22] = "coord replace(SPRITE POINT ENABLE)",
1204 };
1205
1206
1207 static char *
1208 getFallbackString(GLuint bit)
1209 {
1210    int i = 0;
1211    while (bit > 1) {
1212       i++;
1213       bit >>= 1;
1214    }
1215    return fallbackStrings[i];
1216 }
1217
1218
1219
1220 /**
1221  * Enable/disable a fallback flag.
1222  * \param bit  one of INTEL_FALLBACK_x flags.
1223  */
1224 void
1225 intelFallback(struct intel_context *intel, GLbitfield bit, bool mode)
1226 {
1227    struct gl_context *ctx = &intel->ctx;
1228    TNLcontext *tnl = TNL_CONTEXT(ctx);
1229    const GLbitfield oldfallback = intel->Fallback;
1230
1231    if (mode) {
1232       intel->Fallback |= bit;
1233       if (oldfallback == 0) {
1234          assert(!intel->tnl_pipeline_running);
1235
1236          intel_flush(ctx);
1237          if (INTEL_DEBUG & DEBUG_PERF)
1238             fprintf(stderr, "ENTER FALLBACK %x: %s\n",
1239                     bit, getFallbackString(bit));
1240          _swsetup_Wakeup(ctx);
1241          intel->RenderIndex = ~0;
1242       }
1243    }
1244    else {
1245       intel->Fallback &= ~bit;
1246       if (oldfallback == bit) {
1247          assert(!intel->tnl_pipeline_running);
1248
1249          _swrast_flush(ctx);
1250          if (INTEL_DEBUG & DEBUG_PERF)
1251             fprintf(stderr, "LEAVE FALLBACK %s\n", getFallbackString(bit));
1252          tnl->Driver.Render.Start = intelRenderStart;
1253          tnl->Driver.Render.PrimitiveNotify = intelRenderPrimitive;
1254          tnl->Driver.Render.Finish = intelRenderFinish;
1255          tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
1256          tnl->Driver.Render.CopyPV = _tnl_copy_pv;
1257          tnl->Driver.Render.Interp = _tnl_interp;
1258
1259          _tnl_invalidate_vertex_state(ctx, ~0);
1260          _tnl_invalidate_vertices(ctx, ~0);
1261          _tnl_install_attrs(ctx,
1262                             intel->vertex_attrs,
1263                             intel->vertex_attr_count,
1264                             intel->ViewportMatrix.m, 0);
1265
1266          intel->NewGLState |= _INTEL_NEW_RENDERSTATE;
1267       }
1268    }
1269 }
1270
1271 union fi
1272 {
1273    GLfloat f;
1274    GLint i;
1275 };
1276
1277 /**********************************************************************/
1278 /*                            Initialization.                         */
1279 /**********************************************************************/
1280
1281
1282 void
1283 intelInitTriFuncs(struct gl_context * ctx)
1284 {
1285    TNLcontext *tnl = TNL_CONTEXT(ctx);
1286    static int firsttime = 1;
1287
1288    if (firsttime) {
1289       init_rast_tab();
1290       firsttime = 0;
1291    }
1292
1293    tnl->Driver.RunPipeline = intelRunPipeline;
1294    tnl->Driver.Render.Start = intelRenderStart;
1295    tnl->Driver.Render.Finish = intelRenderFinish;
1296    tnl->Driver.Render.PrimitiveNotify = intelRenderPrimitive;
1297    tnl->Driver.Render.ResetLineStipple = _swrast_ResetLineStipple;
1298    tnl->Driver.Render.BuildVertices = _tnl_build_vertices;
1299    tnl->Driver.Render.CopyPV = _tnl_copy_pv;
1300    tnl->Driver.Render.Interp = _tnl_interp;
1301 }