src/mesa/drivers/dri/mga/mgatris.c

   1 /*
   2  * Copyright 2000-2001 VA Linux Systems, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Keith Whitwell <keith@tungstengraphics.com>
  26  */
  27 /* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgatris.c,v 1.10 2002/10/30 12:51:36 alanh Exp $ */
  28
  29 #include "mtypes.h"
  30 #include "macros.h"
  31 #include "colormac.h"
  32 #include "swrast/swrast.h"
  33 #include "swrast_setup/swrast_setup.h"
  34 #include "tnl/t_context.h"
  35 #include "tnl/t_pipeline.h"
  36
  37 #include "mm.h"
  38 #include "mgacontext.h"
  39 #include "mgaioctl.h"
  40 #include "mgatris.h"
  41 #include "mgavb.h"
  42 #include "mgastate.h"
  43
  44
  45 static void mgaRenderPrimitive( GLcontext *ctx, GLenum prim );
  46
  47 /***********************************************************************
  48  *                 Functions to draw basic primitives                  *
  49  ***********************************************************************/
  50
  51
  52 #if defined (USE_X86_ASM)
  53 #define EMIT_VERT( j, vb, vertex_size, v )              \
  54 do {    int __tmp;                                      \
  55         __asm__ __volatile__( "rep ; movsl"             \
  56                          : "=%c" (j), "=D" (vb), "=S" (__tmp)           \
  57                          : "0" (vertex_size),           \
  58                            "D" ((long)vb),              \
  59                            "S" ((long)v));              \
  60 } while (0)
  61 #else
  62 #define EMIT_VERT( j, vb, vertex_size, v )      \
  63 do {                                            \
  64    for ( j = 0 ; j < vertex_size ; j++ )        \
  65       vb[j] = (v)->ui[j];                       \
  66    vb += vertex_size;                           \
  67 } while (0)
  68 #endif
  69
  70 static void __inline__ mga_draw_triangle( mgaContextPtr mmesa,
  71                                            mgaVertexPtr v0,
  72                                            mgaVertexPtr v1,
  73                                            mgaVertexPtr v2 )
  74 {
  75    GLuint vertex_size = mmesa->vertex_size;
  76    GLuint *vb = mgaAllocDmaLow( mmesa, 3 * 4 * vertex_size );
  77    int j;
  78
  79    EMIT_VERT( j, vb, vertex_size, v0 );
  80    EMIT_VERT( j, vb, vertex_size, v1 );
  81    EMIT_VERT( j, vb, vertex_size, v2 );
  82 }
  83
  84
  85 static void __inline__ mga_draw_quad( mgaContextPtr mmesa,
  86                                        mgaVertexPtr v0,
  87                                        mgaVertexPtr v1,
  88                                        mgaVertexPtr v2,
  89                                        mgaVertexPtr v3 )
  90 {
  91    GLuint vertex_size = mmesa->vertex_size;
  92    GLuint *vb = mgaAllocDmaLow( mmesa, 6 * 4 * vertex_size );
  93    int j;
  94
  95    EMIT_VERT( j, vb, vertex_size, v0 );
  96    EMIT_VERT( j, vb, vertex_size, v1 );
  97    EMIT_VERT( j, vb, vertex_size, v3 );
  98    EMIT_VERT( j, vb, vertex_size, v1 );
  99    EMIT_VERT( j, vb, vertex_size, v2 );
 100    EMIT_VERT( j, vb, vertex_size, v3 );
 101 }
 102
 103
 104 static __inline__ void mga_draw_point( mgaContextPtr mmesa,
 105                                         mgaVertexPtr tmp )
 106 {
 107    GLfloat sz = mmesa->glCtx->Point._Size * .5;
 108    int vertex_size = mmesa->vertex_size;
 109    GLuint *vb = mgaAllocDmaLow( mmesa, 6 * 4 * vertex_size );
 110    int j;
 111
 112 #if 0
 113    v0->v.x += PNT_X_OFFSET - TRI_X_OFFSET;
 114    v0->v.y += PNT_Y_OFFSET - TRI_Y_OFFSET;
 115 #endif
 116
 117    /* Draw a point as two triangles.
 118     */
 119    *(float *)&vb[0] = tmp->v.x - sz;
 120    *(float *)&vb[1] = tmp->v.y - sz;
 121    for (j = 2 ; j < vertex_size ; j++)
 122       vb[j] = tmp->ui[j];
 123    vb += vertex_size;
 124
 125    *(float *)&vb[0] = tmp->v.x + sz;
 126    *(float *)&vb[1] = tmp->v.y - sz;
 127    for (j = 2 ; j < vertex_size ; j++)
 128       vb[j] = tmp->ui[j];
 129    vb += vertex_size;
 130
 131    *(float *)&vb[0] = tmp->v.x + sz;
 132    *(float *)&vb[1] = tmp->v.y + sz;
 133    for (j = 2 ; j < vertex_size ; j++)
 134       vb[j] = tmp->ui[j];
 135    vb += vertex_size;
 136
 137    *(float *)&vb[0] = tmp->v.x + sz;
 138    *(float *)&vb[1] = tmp->v.y + sz;
 139    for (j = 2 ; j < vertex_size ; j++)
 140       vb[j] = tmp->ui[j];
 141    vb += vertex_size;
 142
 143    *(float *)&vb[0] = tmp->v.x - sz;
 144    *(float *)&vb[1] = tmp->v.y + sz;
 145    for (j = 2 ; j < vertex_size ; j++)
 146       vb[j] = tmp->ui[j];
 147    vb += vertex_size;
 148
 149    *(float *)&vb[0] = tmp->v.x - sz;
 150    *(float *)&vb[1] = tmp->v.y - sz;
 151    for (j = 2 ; j < vertex_size ; j++)
 152       vb[j] = tmp->ui[j];
 153
 154 #if 0
 155    v0->v.x -= PNT_X_OFFSET - TRI_X_OFFSET;
 156    v0->v.y -= PNT_Y_OFFSET - TRI_Y_OFFSET;
 157 #endif
 158 }
 159
 160
 161 static __inline__ void mga_draw_line( mgaContextPtr mmesa,
 162                                       mgaVertexPtr v0,
 163                                       mgaVertexPtr v1 )
 164 {
 165    GLuint vertex_size = mmesa->vertex_size;
 166    GLuint *vb = mgaAllocDmaLow( mmesa, 6 * 4 * vertex_size );
 167    GLfloat dx, dy, ix, iy;
 168    GLfloat width = mmesa->glCtx->Line._Width;
 169    GLint j;
 170
 171 #if 0
 172    v0->v.x += LINE_X_OFFSET - TRI_X_OFFSET;
 173    v0->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;
 174    v1->v.x += LINE_X_OFFSET - TRI_X_OFFSET;
 175    v1->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;
 176 #endif
 177
 178    dx = v0->v.x - v1->v.x;
 179    dy = v0->v.y - v1->v.y;
 180
 181    ix = width * .5; iy = 0;
 182    if (dx * dx > dy * dy) {
 183       iy = ix; ix = 0;
 184    }
 185
 186    *(float *)&vb[0] = v0->v.x - ix;
 187    *(float *)&vb[1] = v0->v.y - iy;
 188    for (j = 2 ; j < vertex_size ; j++)
 189       vb[j] = v0->ui[j];
 190    vb += vertex_size;
 191
 192    *(float *)&vb[0] = v1->v.x + ix;
 193    *(float *)&vb[1] = v1->v.y + iy;
 194    for (j = 2 ; j < vertex_size ; j++)
 195       vb[j] = v1->ui[j];
 196    vb += vertex_size;
 197
 198    *(float *)&vb[0] = v0->v.x + ix;
 199    *(float *)&vb[1] = v0->v.y + iy;
 200    for (j = 2 ; j < vertex_size ; j++)
 201       vb[j] = v0->ui[j];
 202    vb += vertex_size;
 203
 204    *(float *)&vb[0] = v0->v.x - ix;
 205    *(float *)&vb[1] = v0->v.y - iy;
 206    for (j = 2 ; j < vertex_size ; j++)
 207       vb[j] = v0->ui[j];
 208    vb += vertex_size;
 209
 210    *(float *)&vb[0] = v1->v.x - ix;
 211    *(float *)&vb[1] = v1->v.y - iy;
 212    for (j = 2 ; j < vertex_size ; j++)
 213       vb[j] = v1->ui[j];
 214    vb += vertex_size;
 215
 216    *(float *)&vb[0] = v1->v.x + ix;
 217    *(float *)&vb[1] = v1->v.y + iy;
 218    for (j = 2 ; j < vertex_size ; j++)
 219       vb[j] = v1->ui[j];
 220    vb += vertex_size;
 221
 222 #if 0
 223    v0->v.x -= LINE_X_OFFSET - TRI_X_OFFSET;
 224    v0->v.y -= LINE_Y_OFFSET - TRI_Y_OFFSET;
 225    v1->v.x -= LINE_X_OFFSET - TRI_X_OFFSET;
 226    v1->v.y -= LINE_Y_OFFSET - TRI_Y_OFFSET;
 227 #endif
 228 }
 229
 230 /***********************************************************************
 231  *          Macros for t_dd_tritmp.h to draw basic primitives          *
 232  ***********************************************************************/
 233
 234 #define TRI( a, b, c )                          \
 235 do {                                            \
 236    if (DO_FALLBACK)                             \
 237       mmesa->draw_tri( mmesa, a, b, c );        \
 238    else                                         \
 239       mga_draw_triangle( mmesa, a, b, c );      \
 240 } while (0)
 241
 242 #define QUAD( a, b, c, d )                      \
 243 do {                                            \
 244    if (DO_FALLBACK) {                           \
 245       mmesa->draw_tri( mmesa, a, b, d );        \
 246       mmesa->draw_tri( mmesa, b, c, d );        \
 247    } else {                                     \
 248       mga_draw_quad( mmesa, a, b, c, d );       \
 249    }                                            \
 250 } while (0)
 251
 252 #define LINE( v0, v1 )                          \
 253 do {                                            \
 254    if (DO_FALLBACK)                             \
 255       mmesa->draw_line( mmesa, v0, v1 );        \
 256    else {                                       \
 257       mga_draw_line( mmesa, v0, v1 );           \
 258    }                                            \
 259 } while (0)
 260
 261 #define POINT( v0 )                             \
 262 do {                                            \
 263    if (DO_FALLBACK)                             \
 264       mmesa->draw_point( mmesa, v0 );           \
 265    else {                                       \
 266       mga_draw_point( mmesa, v0 );              \
 267    }                                            \
 268 } while (0)
 269
 270
 271 /***********************************************************************
 272  *              Fallback to swrast for basic primitives                *
 273  ***********************************************************************/
 274
 275 /* This code is hit only when a mix of accelerated and unaccelerated
 276  * primitives are being drawn, and only for the unaccelerated
 277  * primitives.
 278  */
 279
 280 static void
 281 mga_fallback_tri( mgaContextPtr mmesa,
 282                    mgaVertex *v0,
 283                    mgaVertex *v1,
 284                    mgaVertex *v2 )
 285 {
 286    GLcontext *ctx = mmesa->glCtx;
 287    SWvertex v[3];
 288    mga_translate_vertex( ctx, v0, &v[0] );
 289    mga_translate_vertex( ctx, v1, &v[1] );
 290    mga_translate_vertex( ctx, v2, &v[2] );
 291    _swrast_Triangle( ctx, &v[0], &v[1], &v[2] );
 292 }
 293
 294
 295 static void
 296 mga_fallback_line( mgaContextPtr mmesa,
 297                     mgaVertex *v0,
 298                     mgaVertex *v1 )
 299 {
 300    GLcontext *ctx = mmesa->glCtx;
 301    SWvertex v[2];
 302    mga_translate_vertex( ctx, v0, &v[0] );
 303    mga_translate_vertex( ctx, v1, &v[1] );
 304    _swrast_Line( ctx, &v[0], &v[1] );
 305 }
 306
 307
 308 static void
 309 mga_fallback_point( mgaContextPtr mmesa,
 310                      mgaVertex *v0 )
 311 {
 312    GLcontext *ctx = mmesa->glCtx;
 313    SWvertex v[1];
 314    mga_translate_vertex( ctx, v0, &v[0] );
 315    _swrast_Point( ctx, &v[0] );
 316 }
 317
 318 /***********************************************************************
 319  *              Build render functions from dd templates               *
 320  ***********************************************************************/
 321
 322
 323 #define MGA_UNFILLED_BIT    0x1
 324 #define MGA_OFFSET_BIT      0x2
 325 #define MGA_TWOSIDE_BIT     0x4
 326 #define MGA_FLAT_BIT        0x8 /* mga can't flatshade? */
 327 #define MGA_FALLBACK_BIT    0x10
 328 #define MGA_MAX_TRIFUNC     0x20
 329
 330 static struct {
 331    tnl_points_func              points;
 332    tnl_line_func                line;
 333    tnl_triangle_func    triangle;
 334    tnl_quad_func                quad;
 335 } rast_tab[MGA_MAX_TRIFUNC];
 336
 337 #define DO_FALLBACK (IND & MGA_FALLBACK_BIT)
 338 #define DO_OFFSET   (IND & MGA_OFFSET_BIT)
 339 #define DO_UNFILLED (IND & MGA_UNFILLED_BIT)
 340 #define DO_TWOSIDE  (IND & MGA_TWOSIDE_BIT)
 341 #define DO_FLAT     (IND & MGA_FLAT_BIT)
 342 #define DO_TRI       1
 343 #define DO_QUAD      1
 344 #define DO_LINE      1
 345 #define DO_POINTS    1
 346 #define DO_FULL_QUAD 1
 347
 348 #define HAVE_RGBA         1
 349 #define HAVE_BACK_COLORS  0
 350 #define HAVE_SPEC         1
 351 #define HAVE_HW_FLATSHADE 0
 352 #define VERTEX mgaVertex
 353 #define TAB rast_tab
 354
 355
 356 #define DEPTH_SCALE mmesa->depth_scale
 357 #define UNFILLED_TRI unfilled_tri
 358 #define UNFILLED_QUAD unfilled_quad
 359 #define VERT_X(_v) _v->v.x
 360 #define VERT_Y(_v) _v->v.y
 361 #define VERT_Z(_v) _v->v.z
 362 #define AREA_IS_CCW( a ) (a > 0)
 363 #define GET_VERTEX(e) (mmesa->verts + (e * mmesa->vertex_size * sizeof(int)))
 364
 365 #define VERT_SET_RGBA( v, c )                                   \
 366 do {                                                            \
 367    mga_color_t *color = (mga_color_t *)&((v)->ui[4]);   \
 368    UNCLAMPED_FLOAT_TO_UBYTE(color->red, (c)[0]);                \
 369    UNCLAMPED_FLOAT_TO_UBYTE(color->green, (c)[1]);              \
 370    UNCLAMPED_FLOAT_TO_UBYTE(color->blue, (c)[2]);               \
 371    UNCLAMPED_FLOAT_TO_UBYTE(color->alpha, (c)[3]);              \
 372 } while (0)
 373
 374 #define VERT_COPY_RGBA( v0, v1 ) v0->ui[4] = v1->ui[4]
 375
 376 #define VERT_SET_SPEC( v0, c )                                  \
 377 do {                                                            \
 378    UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.red, (c)[0]);        \
 379    UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.green, (c)[1]);      \
 380    UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.blue, (c)[2]);       \
 381 } while (0)
 382
 383 #define VERT_COPY_SPEC( v0, v1 )                \
 384 do {                                            \
 385    v0->v.specular.red   = v1->v.specular.red;   \
 386    v0->v.specular.green = v1->v.specular.green; \
 387    v0->v.specular.blue  = v1->v.specular.blue;  \
 388 } while (0)
 389
 390 #define VERT_SAVE_RGBA( idx )    color[idx] = v[idx]->ui[4]
 391 #define VERT_RESTORE_RGBA( idx ) v[idx]->ui[4] = color[idx]
 392 #define VERT_SAVE_SPEC( idx )    spec[idx] = v[idx]->ui[5]
 393 #define VERT_RESTORE_SPEC( idx ) v[idx]->ui[5] = spec[idx]
 394
 395 #define LOCAL_VARS(n)                                   \
 396    mgaContextPtr mmesa = MGA_CONTEXT(ctx);              \
 397    GLuint color[n], spec[n];                            \
 398    (void) color; (void) spec;
 399
 400
 401
 402 /***********************************************************************
 403  *            Functions to draw basic unfilled primitives              *
 404  ***********************************************************************/
 405
 406 #define RASTERIZE(x) if (mmesa->raster_primitive != x) \
 407                         mgaRasterPrimitive( ctx, x, MGA_WA_TRIANGLES )
 408 #define RENDER_PRIMITIVE mmesa->render_primitive
 409 #define IND MGA_FALLBACK_BIT
 410 #define TAG(x) x
 411 #include "tnl_dd/t_dd_unfilled.h"
 412 #undef IND
 413
 414 /***********************************************************************
 415  *                 Functions to draw GL primitives                     *
 416  ***********************************************************************/
 417
 418 #define IND (0)
 419 #define TAG(x) x
 420 #include "tnl_dd/t_dd_tritmp.h"
 421
 422 #define IND (MGA_OFFSET_BIT)
 423 #define TAG(x) x##_offset
 424 #include "tnl_dd/t_dd_tritmp.h"
 425
 426 #define IND (MGA_TWOSIDE_BIT)
 427 #define TAG(x) x##_twoside
 428 #include "tnl_dd/t_dd_tritmp.h"
 429
 430 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT)
 431 #define TAG(x) x##_twoside_offset
 432 #include "tnl_dd/t_dd_tritmp.h"
 433
 434 #define IND (MGA_UNFILLED_BIT)
 435 #define TAG(x) x##_unfilled
 436 #include "tnl_dd/t_dd_tritmp.h"
 437
 438 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT)
 439 #define TAG(x) x##_offset_unfilled
 440 #include "tnl_dd/t_dd_tritmp.h"
 441
 442 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT)
 443 #define TAG(x) x##_twoside_unfilled
 444 #include "tnl_dd/t_dd_tritmp.h"
 445
 446 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT)
 447 #define TAG(x) x##_twoside_offset_unfilled
 448 #include "tnl_dd/t_dd_tritmp.h"
 449
 450 #define IND (MGA_FALLBACK_BIT)
 451 #define TAG(x) x##_fallback
 452 #include "tnl_dd/t_dd_tritmp.h"
 453
 454 #define IND (MGA_OFFSET_BIT|MGA_FALLBACK_BIT)
 455 #define TAG(x) x##_offset_fallback
 456 #include "tnl_dd/t_dd_tritmp.h"
 457
 458 #define IND (MGA_TWOSIDE_BIT|MGA_FALLBACK_BIT)
 459 #define TAG(x) x##_twoside_fallback
 460 #include "tnl_dd/t_dd_tritmp.h"
 461
 462 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FALLBACK_BIT)
 463 #define TAG(x) x##_twoside_offset_fallback
 464 #include "tnl_dd/t_dd_tritmp.h"
 465
 466 #define IND (MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
 467 #define TAG(x) x##_unfilled_fallback
 468 #include "tnl_dd/t_dd_tritmp.h"
 469
 470 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
 471 #define TAG(x) x##_offset_unfilled_fallback
 472 #include "tnl_dd/t_dd_tritmp.h"
 473
 474 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
 475 #define TAG(x) x##_twoside_unfilled_fallback
 476 #include "tnl_dd/t_dd_tritmp.h"
 477
 478 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT| \
 479              MGA_FALLBACK_BIT)
 480 #define TAG(x) x##_twoside_offset_unfilled_fallback
 481 #include "tnl_dd/t_dd_tritmp.h"
 482
 483
 484 /* Mga doesn't support provoking-vertex flat-shading?
 485  */
 486 #define IND (MGA_FLAT_BIT)
 487 #define TAG(x) x##_flat
 488 #include "tnl_dd/t_dd_tritmp.h"
 489
 490 #define IND (MGA_OFFSET_BIT|MGA_FLAT_BIT)
 491 #define TAG(x) x##_offset_flat
 492 #include "tnl_dd/t_dd_tritmp.h"
 493
 494 #define IND (MGA_TWOSIDE_BIT|MGA_FLAT_BIT)
 495 #define TAG(x) x##_twoside_flat
 496 #include "tnl_dd/t_dd_tritmp.h"
 497
 498 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FLAT_BIT)
 499 #define TAG(x) x##_twoside_offset_flat
 500 #include "tnl_dd/t_dd_tritmp.h"
 501
 502 #define IND (MGA_UNFILLED_BIT|MGA_FLAT_BIT)
 503 #define TAG(x) x##_unfilled_flat
 504 #include "tnl_dd/t_dd_tritmp.h"
 505
 506 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
 507 #define TAG(x) x##_offset_unfilled_flat
 508 #include "tnl_dd/t_dd_tritmp.h"
 509
 510 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
 511 #define TAG(x) x##_twoside_unfilled_flat
 512 #include "tnl_dd/t_dd_tritmp.h"
 513
 514 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
 515 #define TAG(x) x##_twoside_offset_unfilled_flat
 516 #include "tnl_dd/t_dd_tritmp.h"
 517
 518 #define IND (MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 519 #define TAG(x) x##_fallback_flat
 520 #include "tnl_dd/t_dd_tritmp.h"
 521
 522 #define IND (MGA_OFFSET_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 523 #define TAG(x) x##_offset_fallback_flat
 524 #include "tnl_dd/t_dd_tritmp.h"
 525
 526 #define IND (MGA_TWOSIDE_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 527 #define TAG(x) x##_twoside_fallback_flat
 528 #include "tnl_dd/t_dd_tritmp.h"
 529
 530 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 531 #define TAG(x) x##_twoside_offset_fallback_flat
 532 #include "tnl_dd/t_dd_tritmp.h"
 533
 534 #define IND (MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 535 #define TAG(x) x##_unfilled_fallback_flat
 536 #include "tnl_dd/t_dd_tritmp.h"
 537
 538 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 539 #define TAG(x) x##_offset_unfilled_fallback_flat
 540 #include "tnl_dd/t_dd_tritmp.h"
 541
 542 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 543 #define TAG(x) x##_twoside_unfilled_fallback_flat
 544 #include "tnl_dd/t_dd_tritmp.h"
 545
 546 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT| \
 547              MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 548 #define TAG(x) x##_twoside_offset_unfilled_fallback_flat
 549 #include "tnl_dd/t_dd_tritmp.h"
 550
 551
 552 static void init_rast_tab( void )
 553 {
 554    init();
 555    init_offset();
 556    init_twoside();
 557    init_twoside_offset();
 558    init_unfilled();
 559    init_offset_unfilled();
 560    init_twoside_unfilled();
 561    init_twoside_offset_unfilled();
 562    init_fallback();
 563    init_offset_fallback();
 564    init_twoside_fallback();
 565    init_twoside_offset_fallback();
 566    init_unfilled_fallback();
 567    init_offset_unfilled_fallback();
 568    init_twoside_unfilled_fallback();
 569    init_twoside_offset_unfilled_fallback();
 570
 571    init_flat();
 572    init_offset_flat();
 573    init_twoside_flat();
 574    init_twoside_offset_flat();
 575    init_unfilled_flat();
 576    init_offset_unfilled_flat();
 577    init_twoside_unfilled_flat();
 578    init_twoside_offset_unfilled_flat();
 579    init_fallback_flat();
 580    init_offset_fallback_flat();
 581    init_twoside_fallback_flat();
 582    init_twoside_offset_fallback_flat();
 583    init_unfilled_fallback_flat();
 584    init_offset_unfilled_fallback_flat();
 585    init_twoside_unfilled_fallback_flat();
 586    init_twoside_offset_unfilled_fallback_flat();
 587 }
 588
 589 /**********************************************************************/
 590 /*                 Render whole begin/end objects                     */
 591 /**********************************************************************/
 592
 593
 594 #define VERT(x) (mgaVertex *)(vertptr + ((x)*vertex_size*sizeof(int)))
 595 #define RENDER_POINTS( start, count )           \
 596    for ( ; start < count ; start++)             \
 597       mga_draw_point( mmesa, VERT(ELT(start)) );
 598 #define RENDER_LINE( v0, v1 ) \
 599    mga_draw_line( mmesa, VERT(v0), VERT(v1) )
 600 #define RENDER_TRI( v0, v1, v2 )  \
 601    mga_draw_triangle( mmesa, VERT(v0), VERT(v1), VERT(v2) )
 602 #define RENDER_QUAD( v0, v1, v2, v3 ) \
 603    mga_draw_quad( mmesa, VERT(v0), VERT(v1), VERT(v2), VERT(v3) )
 604 #define INIT(x) mgaRenderPrimitive( ctx, x )
 605 #undef LOCAL_VARS
 606 #define LOCAL_VARS                                              \
 607     mgaContextPtr mmesa = MGA_CONTEXT(ctx);                     \
 608     GLubyte *vertptr = (GLubyte *)mmesa->verts;                 \
 609     const GLuint vertex_size = mmesa->vertex_size;              \
 610     const GLuint * const elt = TNL_CONTEXT(ctx)->vb.Elts;       \
 611     (void) elt;
 612 #define RESET_STIPPLE
 613 #define RESET_OCCLUSION
 614 #define PRESERVE_VB_DEFS
 615 #define ELT(x) x
 616 #define TAG(x) mga_##x##_verts
 617 #include "tnl/t_vb_rendertmp.h"
 618 #undef ELT
 619 #undef TAG
 620 #define TAG(x) mga_##x##_elts
 621 #define ELT(x) elt[x]
 622 #include "tnl/t_vb_rendertmp.h"
 623
 624
 625 /**********************************************************************/
 626 /*                   Render clipped primitives                        */
 627 /**********************************************************************/
 628
 629
 630
 631 static void mgaRenderClippedPoly( GLcontext *ctx, const GLuint *elts, GLuint n )
 632 {
 633    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 634    TNLcontext *tnl = TNL_CONTEXT(ctx);
 635    struct vertex_buffer *VB = &tnl->vb;
 636    GLuint prim = mmesa->render_primitive;
 637
 638    /* Render the new vertices as an unclipped polygon.
 639     */
 640    {
 641       GLuint *tmp = VB->Elts;
 642       VB->Elts = (GLuint *)elts;
 643       tnl->Driver.Render.PrimTabElts[GL_POLYGON]( ctx, 0, n, PRIM_BEGIN|PRIM_END );
 644       VB->Elts = tmp;
 645    }
 646
 647    /* Restore the render primitive
 648     */
 649    if (prim != GL_POLYGON)
 650       tnl->Driver.Render.PrimitiveNotify( ctx, prim );
 651 }
 652
 653 static void mgaRenderClippedLine( GLcontext *ctx, GLuint ii, GLuint jj )
 654 {
 655    TNLcontext *tnl = TNL_CONTEXT(ctx);
 656    tnl->Driver.Render.Line( ctx, ii, jj );
 657 }
 658
 659 static void mgaFastRenderClippedPoly( GLcontext *ctx, const GLuint *elts,
 660                                        GLuint n )
 661 {
 662    mgaContextPtr mmesa = MGA_CONTEXT( ctx );
 663    GLuint vertex_size = mmesa->vertex_size;
 664    GLuint *vb = mgaAllocDmaLow( mmesa, (n-2) * 3 * 4 * vertex_size );
 665    GLubyte *vertptr = (GLubyte *)mmesa->verts;
 666    const GLuint *start = (const GLuint *)VERT(elts[0]);
 667    int i,j;
 668
 669    for (i = 2 ; i < n ; i++) {
 670       EMIT_VERT( j, vb, vertex_size, (mgaVertexPtr) VERT(elts[i-1]) );
 671       EMIT_VERT( j, vb, vertex_size, (mgaVertexPtr) VERT(elts[i]) );
 672       EMIT_VERT( j, vb, vertex_size, (mgaVertexPtr) start );
 673    }
 674 }
 675
 676 /**********************************************************************/
 677 /*                    Choose render functions                         */
 678 /**********************************************************************/
 679
 680
 681 #define POINT_FALLBACK (DD_POINT_SMOOTH)
 682 #define LINE_FALLBACK (DD_LINE_SMOOTH | DD_LINE_STIPPLE)
 683 #define TRI_FALLBACK (DD_TRI_SMOOTH | DD_TRI_UNFILLED)
 684 #define ANY_FALLBACK_FLAGS (POINT_FALLBACK|LINE_FALLBACK|TRI_FALLBACK)
 685 #define ANY_RASTER_FLAGS (DD_FLATSHADE|DD_TRI_LIGHT_TWOSIDE|DD_TRI_OFFSET| \
 686                           DD_TRI_UNFILLED)
 687
 688 void mgaChooseRenderState(GLcontext *ctx)
 689 {
 690    TNLcontext *tnl = TNL_CONTEXT(ctx);
 691    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 692    GLuint flags = ctx->_TriangleCaps;
 693    GLuint index = 0;
 694
 695    if (flags & (ANY_FALLBACK_FLAGS|ANY_RASTER_FLAGS|DD_TRI_STIPPLE)) {
 696       if (flags & ANY_RASTER_FLAGS) {
 697          if (flags & DD_TRI_LIGHT_TWOSIDE)    index |= MGA_TWOSIDE_BIT;
 698          if (flags & DD_TRI_OFFSET)           index |= MGA_OFFSET_BIT;
 699          if (flags & DD_TRI_UNFILLED)         index |= MGA_UNFILLED_BIT;
 700          if (flags & DD_FLATSHADE)            index |= MGA_FLAT_BIT;
 701       }
 702
 703       mmesa->draw_point = mga_draw_point;
 704       mmesa->draw_line = mga_draw_line;
 705       mmesa->draw_tri = mga_draw_triangle;
 706
 707       /* Hook in fallbacks for specific primitives.
 708        */
 709       if (flags & ANY_FALLBACK_FLAGS)
 710       {
 711          if (flags & POINT_FALLBACK)
 712             mmesa->draw_point = mga_fallback_point;
 713
 714          if (flags & LINE_FALLBACK)
 715             mmesa->draw_line = mga_fallback_line;
 716
 717          if (flags & TRI_FALLBACK)
 718             mmesa->draw_tri = mga_fallback_tri;
 719
 720          index |= MGA_FALLBACK_BIT;
 721       }
 722
 723       if ((flags & DD_TRI_STIPPLE) && !mmesa->haveHwStipple) {
 724          mmesa->draw_tri = mga_fallback_tri;
 725          index |= MGA_FALLBACK_BIT;
 726       }
 727    }
 728
 729    if (mmesa->RenderIndex != index) {
 730       mmesa->RenderIndex = index;
 731
 732       tnl->Driver.Render.Points = rast_tab[index].points;
 733       tnl->Driver.Render.Line = rast_tab[index].line;
 734       tnl->Driver.Render.Triangle = rast_tab[index].triangle;
 735       tnl->Driver.Render.Quad = rast_tab[index].quad;
 736
 737       if (index == 0) {
 738          tnl->Driver.Render.PrimTabVerts = mga_render_tab_verts;
 739          tnl->Driver.Render.PrimTabElts = mga_render_tab_elts;
 740          tnl->Driver.Render.ClippedLine = line; /* from tritmp.h */
 741          tnl->Driver.Render.ClippedPolygon = mgaFastRenderClippedPoly;
 742       } else {
 743          tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 744          tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 745          tnl->Driver.Render.ClippedLine = mgaRenderClippedLine;
 746          tnl->Driver.Render.ClippedPolygon = mgaRenderClippedPoly;
 747       }
 748    }
 749 }
 750
 751 /**********************************************************************/
 752 /*                Runtime render state and callbacks                  */
 753 /**********************************************************************/
 754
 755
 756 static GLenum reduced_prim[GL_POLYGON+1] = {
 757    GL_POINTS,
 758    GL_LINES,
 759    GL_LINES,
 760    GL_LINES,
 761    GL_TRIANGLES,
 762    GL_TRIANGLES,
 763    GL_TRIANGLES,
 764    GL_TRIANGLES,
 765    GL_TRIANGLES,
 766    GL_TRIANGLES
 767 };
 768
 769
 770
 771 /* Always called between RenderStart and RenderFinish --> We already
 772  * hold the lock.
 773  */
 774 void mgaRasterPrimitive( GLcontext *ctx, GLenum prim, GLuint hwprim )
 775 {
 776    mgaContextPtr mmesa = MGA_CONTEXT( ctx );
 777
 778    FLUSH_BATCH( mmesa );
 779
 780    /* Update culling */
 781    if (mmesa->raster_primitive != prim)
 782       mmesa->dirty |= MGA_UPLOAD_CONTEXT;
 783
 784    mmesa->raster_primitive = prim;
 785 /*     mmesa->hw_primitive = hwprim; */
 786    mmesa->hw_primitive = MGA_WA_TRIANGLES; /* disable mgarender.c for now */
 787
 788    if (ctx->Polygon.StippleFlag && mmesa->haveHwStipple)
 789    {
 790       mmesa->dirty |= MGA_UPLOAD_CONTEXT;
 791       mmesa->setup.dwgctl &= ~(0xf<<20);
 792       if (mmesa->raster_primitive == GL_TRIANGLES)
 793          mmesa->setup.dwgctl |= mmesa->poly_stipple;
 794    }
 795 }
 796
 797
 798
 799 /* Determine the rasterized primitive when not drawing unfilled
 800  * polygons.
 801  *
 802  * Used only for the default render stage which always decomposes
 803  * primitives to trianges/lines/points.  For the accelerated stage,
 804  * which renders strips as strips, the equivalent calculations are
 805  * performed in mgarender.c.
 806  */
 807 static void mgaRenderPrimitive( GLcontext *ctx, GLenum prim )
 808 {
 809    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 810    GLuint rprim = reduced_prim[prim];
 811
 812    mmesa->render_primitive = prim;
 813
 814    if (rprim == GL_TRIANGLES && (ctx->_TriangleCaps & DD_TRI_UNFILLED))
 815       return;
 816
 817    if (mmesa->raster_primitive != rprim) {
 818       mgaRasterPrimitive( ctx, rprim, MGA_WA_TRIANGLES );
 819    }
 820 }
 821
 822 static void mgaRenderFinish( GLcontext *ctx )
 823 {
 824    if (MGA_CONTEXT(ctx)->RenderIndex & MGA_FALLBACK_BIT)
 825       _swrast_flush( ctx );
 826 }
 827
 828
 829
 830 /**********************************************************************/
 831 /*               Manage total rasterization fallbacks                 */
 832 /**********************************************************************/
 833
 834 static const char * const fallbackStrings[] = {
 835    "Texture mode",
 836    "glDrawBuffer(GL_FRONT_AND_BACK)",
 837    "read buffer",
 838    "glBlendFunc(GL_SRC_ALPHA_SATURATE, GL_ZERO)",
 839    "glRenderMode(selection or feedback)",
 840    "No hardware stencil",
 841    "glDepthFunc( GL_NEVER )",
 842    "Mixing GL_CLAMP_TO_EDGE and GL_CLAMP",
 843    "rasterization fallback option"
 844 };
 845
 846 static const char *getFallbackString(GLuint bit)
 847 {
 848    int i = 0;
 849    while (bit > 1) {
 850       i++;
 851       bit >>= 1;
 852    }
 853    return fallbackStrings[i];
 854 }
 855
 856
 857 void mgaFallback( GLcontext *ctx, GLuint bit, GLboolean mode )
 858 {
 859    TNLcontext *tnl = TNL_CONTEXT(ctx);
 860    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 861    GLuint oldfallback = mmesa->Fallback;
 862
 863    if (mode) {
 864       mmesa->Fallback |= bit;
 865       if (oldfallback == 0) {
 866          FLUSH_BATCH(mmesa);
 867          _swsetup_Wakeup( ctx );
 868          mmesa->RenderIndex = ~0;
 869          if (MGA_DEBUG & DEBUG_VERBOSE_FALLBACK) {
 870             fprintf(stderr, "MGA begin rasterization fallback: 0x%x %s\n",
 871                     bit, getFallbackString(bit));
 872          }
 873       }
 874    }
 875    else {
 876       mmesa->Fallback &= ~bit;
 877       if (oldfallback == bit) {
 878          _swrast_flush( ctx );
 879          tnl->Driver.Render.Start = mgaCheckTexSizes;
 880          tnl->Driver.Render.PrimitiveNotify = mgaRenderPrimitive;
 881          tnl->Driver.Render.Finish = mgaRenderFinish;
 882          tnl->Driver.Render.BuildVertices = mgaBuildVertices;
 883          mmesa->NewGLState |= (_MGA_NEW_RENDERSTATE |
 884                                _MGA_NEW_RASTERSETUP);
 885          if (MGA_DEBUG & DEBUG_VERBOSE_FALLBACK) {
 886             fprintf(stderr, "MGA end rasterization fallback: 0x%x %s\n",
 887                     bit, getFallbackString(bit));
 888          }
 889       }
 890    }
 891 }
 892
 893
 894 void mgaDDInitTriFuncs( GLcontext *ctx )
 895 {
 896    TNLcontext *tnl = TNL_CONTEXT(ctx);
 897    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 898    static int firsttime = 1;
 899    if (firsttime) {
 900       init_rast_tab();
 901       firsttime = 0;
 902    }
 903
 904    mmesa->RenderIndex = ~0;
 905
 906    tnl->Driver.Render.Start              = mgaCheckTexSizes;
 907    tnl->Driver.Render.Finish             = mgaRenderFinish;
 908    tnl->Driver.Render.PrimitiveNotify    = mgaRenderPrimitive;
 909    tnl->Driver.Render.ResetLineStipple   = _swrast_ResetLineStipple;
 910    tnl->Driver.Render.BuildVertices      = mgaBuildVertices;
 911    tnl->Driver.Render.Multipass          = NULL;
 912 }