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
  28 #include "main/mtypes.h"
  29 #include "main/macros.h"
  30 #include "main/colormac.h"
  31 #include "main/mm.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 "mgacontext.h"
  38 #include "mgaioctl.h"
  39 #include "mgatris.h"
  40 #include "mgavb.h"
  41
  42
  43 static void mgaRenderPrimitive( GLcontext *ctx, GLenum prim );
  44
  45 /***********************************************************************
  46  *                 Functions to draw basic primitives                  *
  47  ***********************************************************************/
  48
  49
  50 #if defined (USE_X86_ASM)
  51 #define EMIT_VERT( j, vb, vertex_size, v )              \
  52 do {    int __tmp;                                      \
  53         __asm__ __volatile__( "rep ; movsl"             \
  54                          : "=%c" (j), "=D" (vb), "=S" (__tmp)           \
  55                          : "0" (vertex_size),           \
  56                            "D" ((long)vb),              \
  57                            "S" ((long)v));              \
  58 } while (0)
  59 #else
  60 #define EMIT_VERT( j, vb, vertex_size, v )      \
  61 do {                                            \
  62    for ( j = 0 ; j < vertex_size ; j++ )        \
  63       vb[j] = (v)->ui[j];                       \
  64    vb += vertex_size;                           \
  65 } while (0)
  66 #endif
  67
  68 static void INLINE mga_draw_triangle( mgaContextPtr mmesa,
  69                                            mgaVertexPtr v0,
  70                                            mgaVertexPtr v1,
  71                                            mgaVertexPtr v2 )
  72 {
  73    GLuint vertex_size = mmesa->vertex_size;
  74    GLuint *vb = mgaAllocDmaLow( mmesa, 3 * 4 * vertex_size );
  75    int j;
  76
  77    EMIT_VERT( j, vb, vertex_size, v0 );
  78    EMIT_VERT( j, vb, vertex_size, v1 );
  79    EMIT_VERT( j, vb, vertex_size, v2 );
  80 }
  81
  82
  83 static void INLINE mga_draw_quad( mgaContextPtr mmesa,
  84                                        mgaVertexPtr v0,
  85                                        mgaVertexPtr v1,
  86                                        mgaVertexPtr v2,
  87                                        mgaVertexPtr v3 )
  88 {
  89    GLuint vertex_size = mmesa->vertex_size;
  90    GLuint *vb = mgaAllocDmaLow( mmesa, 6 * 4 * vertex_size );
  91    int j;
  92
  93    EMIT_VERT( j, vb, vertex_size, v0 );
  94    EMIT_VERT( j, vb, vertex_size, v1 );
  95    EMIT_VERT( j, vb, vertex_size, v3 );
  96    EMIT_VERT( j, vb, vertex_size, v1 );
  97    EMIT_VERT( j, vb, vertex_size, v2 );
  98    EMIT_VERT( j, vb, vertex_size, v3 );
  99 }
 100
 101
 102 static INLINE void mga_draw_point( mgaContextPtr mmesa,
 103                                         mgaVertexPtr tmp )
 104 {
 105    const GLfloat sz = 0.5 * CLAMP(mmesa->glCtx->Point.Size,
 106                                   mmesa->glCtx->Const.MinPointSize,
 107                                   mmesa->glCtx->Const.MaxPointSize);
 108    const 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    const GLfloat width = CLAMP(mmesa->glCtx->Line.Width,
 169                                mmesa->glCtx->Const.MinLineWidth,
 170                                mmesa->glCtx->Const.MaxLineWidth);
 171    GLint j;
 172
 173 #if 0
 174    v0->v.x += LINE_X_OFFSET - TRI_X_OFFSET;
 175    v0->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;
 176    v1->v.x += LINE_X_OFFSET - TRI_X_OFFSET;
 177    v1->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;
 178 #endif
 179
 180    dx = v0->v.x - v1->v.x;
 181    dy = v0->v.y - v1->v.y;
 182
 183    ix = width * .5; iy = 0;
 184    if (dx * dx > dy * dy) {
 185       iy = ix; ix = 0;
 186    }
 187
 188    *(float *)&vb[0] = v0->v.x - ix;
 189    *(float *)&vb[1] = v0->v.y - iy;
 190    for (j = 2 ; j < vertex_size ; j++)
 191       vb[j] = v0->ui[j];
 192    vb += vertex_size;
 193
 194    *(float *)&vb[0] = v1->v.x + ix;
 195    *(float *)&vb[1] = v1->v.y + iy;
 196    for (j = 2 ; j < vertex_size ; j++)
 197       vb[j] = v1->ui[j];
 198    vb += vertex_size;
 199
 200    *(float *)&vb[0] = v0->v.x + ix;
 201    *(float *)&vb[1] = v0->v.y + iy;
 202    for (j = 2 ; j < vertex_size ; j++)
 203       vb[j] = v0->ui[j];
 204    vb += vertex_size;
 205
 206    *(float *)&vb[0] = v0->v.x - ix;
 207    *(float *)&vb[1] = v0->v.y - iy;
 208    for (j = 2 ; j < vertex_size ; j++)
 209       vb[j] = v0->ui[j];
 210    vb += vertex_size;
 211
 212    *(float *)&vb[0] = v1->v.x - ix;
 213    *(float *)&vb[1] = v1->v.y - iy;
 214    for (j = 2 ; j < vertex_size ; j++)
 215       vb[j] = v1->ui[j];
 216    vb += vertex_size;
 217
 218    *(float *)&vb[0] = v1->v.x + ix;
 219    *(float *)&vb[1] = v1->v.y + iy;
 220    for (j = 2 ; j < vertex_size ; j++)
 221       vb[j] = v1->ui[j];
 222    vb += vertex_size;
 223
 224 #if 0
 225    v0->v.x -= LINE_X_OFFSET - TRI_X_OFFSET;
 226    v0->v.y -= LINE_Y_OFFSET - TRI_Y_OFFSET;
 227    v1->v.x -= LINE_X_OFFSET - TRI_X_OFFSET;
 228    v1->v.y -= LINE_Y_OFFSET - TRI_Y_OFFSET;
 229 #endif
 230 }
 231
 232 /***********************************************************************
 233  *          Macros for t_dd_tritmp.h to draw basic primitives          *
 234  ***********************************************************************/
 235
 236 #define TRI( a, b, c )                          \
 237 do {                                            \
 238    if (DO_FALLBACK)                             \
 239       mmesa->draw_tri( mmesa, a, b, c );        \
 240    else                                         \
 241       mga_draw_triangle( mmesa, a, b, c );      \
 242 } while (0)
 243
 244 #define QUAD( a, b, c, d )                      \
 245 do {                                            \
 246    if (DO_FALLBACK) {                           \
 247       mmesa->draw_tri( mmesa, a, b, d );        \
 248       mmesa->draw_tri( mmesa, b, c, d );        \
 249    } else {                                     \
 250       mga_draw_quad( mmesa, a, b, c, d );       \
 251    }                                            \
 252 } while (0)
 253
 254 #define LINE( v0, v1 )                          \
 255 do {                                            \
 256    if (DO_FALLBACK)                             \
 257       mmesa->draw_line( mmesa, v0, v1 );        \
 258    else {                                       \
 259       mga_draw_line( mmesa, v0, v1 );           \
 260    }                                            \
 261 } while (0)
 262
 263 #define POINT( v0 )                             \
 264 do {                                            \
 265    if (DO_FALLBACK)                             \
 266       mmesa->draw_point( mmesa, v0 );           \
 267    else {                                       \
 268       mga_draw_point( mmesa, v0 );              \
 269    }                                            \
 270 } while (0)
 271
 272
 273 /***********************************************************************
 274  *              Fallback to swrast for basic primitives                *
 275  ***********************************************************************/
 276
 277 /* This code is hit only when a mix of accelerated and unaccelerated
 278  * primitives are being drawn, and only for the unaccelerated
 279  * primitives.
 280  */
 281
 282 static void
 283 mga_fallback_tri( mgaContextPtr mmesa,
 284                    mgaVertex *v0,
 285                    mgaVertex *v1,
 286                    mgaVertex *v2 )
 287 {
 288    GLcontext *ctx = mmesa->glCtx;
 289    SWvertex v[3];
 290    mga_translate_vertex( ctx, v0, &v[0] );
 291    mga_translate_vertex( ctx, v1, &v[1] );
 292    mga_translate_vertex( ctx, v2, &v[2] );
 293    _swrast_Triangle( ctx, &v[0], &v[1], &v[2] );
 294 }
 295
 296
 297 static void
 298 mga_fallback_line( mgaContextPtr mmesa,
 299                     mgaVertex *v0,
 300                     mgaVertex *v1 )
 301 {
 302    GLcontext *ctx = mmesa->glCtx;
 303    SWvertex v[2];
 304    mga_translate_vertex( ctx, v0, &v[0] );
 305    mga_translate_vertex( ctx, v1, &v[1] );
 306    _swrast_Line( ctx, &v[0], &v[1] );
 307 }
 308
 309
 310 static void
 311 mga_fallback_point( mgaContextPtr mmesa,
 312                      mgaVertex *v0 )
 313 {
 314    GLcontext *ctx = mmesa->glCtx;
 315    SWvertex v[1];
 316    mga_translate_vertex( ctx, v0, &v[0] );
 317    _swrast_Point( ctx, &v[0] );
 318 }
 319
 320 /***********************************************************************
 321  *              Build render functions from dd templates               *
 322  ***********************************************************************/
 323
 324
 325 #define MGA_UNFILLED_BIT    0x1
 326 #define MGA_OFFSET_BIT      0x2
 327 #define MGA_TWOSIDE_BIT     0x4
 328 #define MGA_FLAT_BIT        0x8 /* mga can't flatshade? */
 329 #define MGA_FALLBACK_BIT    0x10
 330 #define MGA_MAX_TRIFUNC     0x20
 331
 332 static struct {
 333    tnl_points_func              points;
 334    tnl_line_func                line;
 335    tnl_triangle_func    triangle;
 336    tnl_quad_func                quad;
 337 } rast_tab[MGA_MAX_TRIFUNC];
 338
 339 #define DO_FALLBACK (IND & MGA_FALLBACK_BIT)
 340 #define DO_OFFSET   (IND & MGA_OFFSET_BIT)
 341 #define DO_UNFILLED (IND & MGA_UNFILLED_BIT)
 342 #define DO_TWOSIDE  (IND & MGA_TWOSIDE_BIT)
 343 #define DO_FLAT     (IND & MGA_FLAT_BIT)
 344 #define DO_TRI       1
 345 #define DO_QUAD      1
 346 #define DO_LINE      1
 347 #define DO_POINTS    1
 348 #define DO_FULL_QUAD 1
 349
 350 #define HAVE_BACK_COLORS  0
 351 #define HAVE_SPEC         1
 352 #define HAVE_HW_FLATSHADE 0
 353 #define VERTEX mgaVertex
 354 #define TAB rast_tab
 355
 356
 357 #define DEPTH_SCALE mmesa->depth_scale
 358 #define UNFILLED_TRI unfilled_tri
 359 #define UNFILLED_QUAD unfilled_quad
 360 #define VERT_X(_v) _v->v.x
 361 #define VERT_Y(_v) _v->v.y
 362 #define VERT_Z(_v) _v->v.z
 363 #define AREA_IS_CCW( a ) (a > 0)
 364 #define GET_VERTEX(e) (mmesa->verts + (e * mmesa->vertex_size * sizeof(int)))
 365
 366 #define VERT_SET_RGBA( v, c )                                   \
 367 do {                                                            \
 368    mga_color_t *color = (mga_color_t *)&((v)->ui[4]);   \
 369    UNCLAMPED_FLOAT_TO_UBYTE(color->red, (c)[0]);                \
 370    UNCLAMPED_FLOAT_TO_UBYTE(color->green, (c)[1]);              \
 371    UNCLAMPED_FLOAT_TO_UBYTE(color->blue, (c)[2]);               \
 372    UNCLAMPED_FLOAT_TO_UBYTE(color->alpha, (c)[3]);              \
 373 } while (0)
 374
 375 #define VERT_COPY_RGBA( v0, v1 ) v0->ui[4] = v1->ui[4]
 376
 377 #define VERT_SET_SPEC( v0, c )                                  \
 378 do {                                                            \
 379    UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.red, (c)[0]);        \
 380    UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.green, (c)[1]);      \
 381    UNCLAMPED_FLOAT_TO_UBYTE(v0->v.specular.blue, (c)[2]);       \
 382 } while (0)
 383
 384 #define VERT_COPY_SPEC( v0, v1 )                \
 385 do {                                            \
 386    v0->v.specular.red   = v1->v.specular.red;   \
 387    v0->v.specular.green = v1->v.specular.green; \
 388    v0->v.specular.blue  = v1->v.specular.blue;  \
 389 } while (0)
 390
 391 #define VERT_SAVE_RGBA( idx )    color[idx] = v[idx]->ui[4]
 392 #define VERT_RESTORE_RGBA( idx ) v[idx]->ui[4] = color[idx]
 393 #define VERT_SAVE_SPEC( idx )    spec[idx] = v[idx]->ui[5]
 394 #define VERT_RESTORE_SPEC( idx ) v[idx]->ui[5] = spec[idx]
 395
 396 #define LOCAL_VARS(n)                                   \
 397    mgaContextPtr mmesa = MGA_CONTEXT(ctx);              \
 398    GLuint color[n] = { 0 };                             \
 399    GLuint spec[n] = { 0 };                              \
 400    (void) color; (void) spec;
 401
 402
 403
 404 /***********************************************************************
 405  *            Functions to draw basic unfilled primitives              *
 406  ***********************************************************************/
 407
 408 #define RASTERIZE(x) if (mmesa->raster_primitive != x) \
 409                         mgaRasterPrimitive( ctx, x, MGA_WA_TRIANGLES )
 410 #define RENDER_PRIMITIVE mmesa->render_primitive
 411 #define IND MGA_FALLBACK_BIT
 412 #define TAG(x) x
 413 #include "tnl_dd/t_dd_unfilled.h"
 414 #undef IND
 415
 416 /***********************************************************************
 417  *                 Functions to draw GL primitives                     *
 418  ***********************************************************************/
 419
 420 #define IND (0)
 421 #define TAG(x) x
 422 #include "tnl_dd/t_dd_tritmp.h"
 423
 424 #define IND (MGA_OFFSET_BIT)
 425 #define TAG(x) x##_offset
 426 #include "tnl_dd/t_dd_tritmp.h"
 427
 428 #define IND (MGA_TWOSIDE_BIT)
 429 #define TAG(x) x##_twoside
 430 #include "tnl_dd/t_dd_tritmp.h"
 431
 432 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT)
 433 #define TAG(x) x##_twoside_offset
 434 #include "tnl_dd/t_dd_tritmp.h"
 435
 436 #define IND (MGA_UNFILLED_BIT)
 437 #define TAG(x) x##_unfilled
 438 #include "tnl_dd/t_dd_tritmp.h"
 439
 440 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT)
 441 #define TAG(x) x##_offset_unfilled
 442 #include "tnl_dd/t_dd_tritmp.h"
 443
 444 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT)
 445 #define TAG(x) x##_twoside_unfilled
 446 #include "tnl_dd/t_dd_tritmp.h"
 447
 448 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT)
 449 #define TAG(x) x##_twoside_offset_unfilled
 450 #include "tnl_dd/t_dd_tritmp.h"
 451
 452 #define IND (MGA_FALLBACK_BIT)
 453 #define TAG(x) x##_fallback
 454 #include "tnl_dd/t_dd_tritmp.h"
 455
 456 #define IND (MGA_OFFSET_BIT|MGA_FALLBACK_BIT)
 457 #define TAG(x) x##_offset_fallback
 458 #include "tnl_dd/t_dd_tritmp.h"
 459
 460 #define IND (MGA_TWOSIDE_BIT|MGA_FALLBACK_BIT)
 461 #define TAG(x) x##_twoside_fallback
 462 #include "tnl_dd/t_dd_tritmp.h"
 463
 464 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FALLBACK_BIT)
 465 #define TAG(x) x##_twoside_offset_fallback
 466 #include "tnl_dd/t_dd_tritmp.h"
 467
 468 #define IND (MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
 469 #define TAG(x) x##_unfilled_fallback
 470 #include "tnl_dd/t_dd_tritmp.h"
 471
 472 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
 473 #define TAG(x) x##_offset_unfilled_fallback
 474 #include "tnl_dd/t_dd_tritmp.h"
 475
 476 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT)
 477 #define TAG(x) x##_twoside_unfilled_fallback
 478 #include "tnl_dd/t_dd_tritmp.h"
 479
 480 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT| \
 481              MGA_FALLBACK_BIT)
 482 #define TAG(x) x##_twoside_offset_unfilled_fallback
 483 #include "tnl_dd/t_dd_tritmp.h"
 484
 485
 486 /* Mga doesn't support provoking-vertex flat-shading?
 487  */
 488 #define IND (MGA_FLAT_BIT)
 489 #define TAG(x) x##_flat
 490 #include "tnl_dd/t_dd_tritmp.h"
 491
 492 #define IND (MGA_OFFSET_BIT|MGA_FLAT_BIT)
 493 #define TAG(x) x##_offset_flat
 494 #include "tnl_dd/t_dd_tritmp.h"
 495
 496 #define IND (MGA_TWOSIDE_BIT|MGA_FLAT_BIT)
 497 #define TAG(x) x##_twoside_flat
 498 #include "tnl_dd/t_dd_tritmp.h"
 499
 500 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FLAT_BIT)
 501 #define TAG(x) x##_twoside_offset_flat
 502 #include "tnl_dd/t_dd_tritmp.h"
 503
 504 #define IND (MGA_UNFILLED_BIT|MGA_FLAT_BIT)
 505 #define TAG(x) x##_unfilled_flat
 506 #include "tnl_dd/t_dd_tritmp.h"
 507
 508 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
 509 #define TAG(x) x##_offset_unfilled_flat
 510 #include "tnl_dd/t_dd_tritmp.h"
 511
 512 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
 513 #define TAG(x) x##_twoside_unfilled_flat
 514 #include "tnl_dd/t_dd_tritmp.h"
 515
 516 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FLAT_BIT)
 517 #define TAG(x) x##_twoside_offset_unfilled_flat
 518 #include "tnl_dd/t_dd_tritmp.h"
 519
 520 #define IND (MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 521 #define TAG(x) x##_fallback_flat
 522 #include "tnl_dd/t_dd_tritmp.h"
 523
 524 #define IND (MGA_OFFSET_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 525 #define TAG(x) x##_offset_fallback_flat
 526 #include "tnl_dd/t_dd_tritmp.h"
 527
 528 #define IND (MGA_TWOSIDE_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 529 #define TAG(x) x##_twoside_fallback_flat
 530 #include "tnl_dd/t_dd_tritmp.h"
 531
 532 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 533 #define TAG(x) x##_twoside_offset_fallback_flat
 534 #include "tnl_dd/t_dd_tritmp.h"
 535
 536 #define IND (MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 537 #define TAG(x) x##_unfilled_fallback_flat
 538 #include "tnl_dd/t_dd_tritmp.h"
 539
 540 #define IND (MGA_OFFSET_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 541 #define TAG(x) x##_offset_unfilled_fallback_flat
 542 #include "tnl_dd/t_dd_tritmp.h"
 543
 544 #define IND (MGA_TWOSIDE_BIT|MGA_UNFILLED_BIT|MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 545 #define TAG(x) x##_twoside_unfilled_fallback_flat
 546 #include "tnl_dd/t_dd_tritmp.h"
 547
 548 #define IND (MGA_TWOSIDE_BIT|MGA_OFFSET_BIT|MGA_UNFILLED_BIT| \
 549              MGA_FALLBACK_BIT|MGA_FLAT_BIT)
 550 #define TAG(x) x##_twoside_offset_unfilled_fallback_flat
 551 #include "tnl_dd/t_dd_tritmp.h"
 552
 553
 554 static void init_rast_tab( void )
 555 {
 556    init();
 557    init_offset();
 558    init_twoside();
 559    init_twoside_offset();
 560    init_unfilled();
 561    init_offset_unfilled();
 562    init_twoside_unfilled();
 563    init_twoside_offset_unfilled();
 564    init_fallback();
 565    init_offset_fallback();
 566    init_twoside_fallback();
 567    init_twoside_offset_fallback();
 568    init_unfilled_fallback();
 569    init_offset_unfilled_fallback();
 570    init_twoside_unfilled_fallback();
 571    init_twoside_offset_unfilled_fallback();
 572
 573    init_flat();
 574    init_offset_flat();
 575    init_twoside_flat();
 576    init_twoside_offset_flat();
 577    init_unfilled_flat();
 578    init_offset_unfilled_flat();
 579    init_twoside_unfilled_flat();
 580    init_twoside_offset_unfilled_flat();
 581    init_fallback_flat();
 582    init_offset_fallback_flat();
 583    init_twoside_fallback_flat();
 584    init_twoside_offset_fallback_flat();
 585    init_unfilled_fallback_flat();
 586    init_offset_unfilled_fallback_flat();
 587    init_twoside_unfilled_fallback_flat();
 588    init_twoside_offset_unfilled_fallback_flat();
 589 }
 590
 591 /**********************************************************************/
 592 /*                 Render whole begin/end objects                     */
 593 /**********************************************************************/
 594
 595
 596 #define VERT(x) (mgaVertex *)(vertptr + ((x)*vertex_size*sizeof(int)))
 597 #define RENDER_POINTS( start, count )           \
 598    for ( ; start < count ; start++)             \
 599       mga_draw_point( mmesa, VERT(ELT(start)) );
 600 #define RENDER_LINE( v0, v1 ) \
 601    mga_draw_line( mmesa, VERT(v0), VERT(v1) )
 602 #define RENDER_TRI( v0, v1, v2 )  \
 603    mga_draw_triangle( mmesa, VERT(v0), VERT(v1), VERT(v2) )
 604 #define RENDER_QUAD( v0, v1, v2, v3 ) \
 605    mga_draw_quad( mmesa, VERT(v0), VERT(v1), VERT(v2), VERT(v3) )
 606 #define INIT(x) mgaRenderPrimitive( ctx, x )
 607 #undef LOCAL_VARS
 608 #define LOCAL_VARS                                              \
 609     mgaContextPtr mmesa = MGA_CONTEXT(ctx);                     \
 610     GLubyte *vertptr = (GLubyte *)mmesa->verts;                 \
 611     const GLuint vertex_size = mmesa->vertex_size;              \
 612     const GLuint * const elt = TNL_CONTEXT(ctx)->vb.Elts;       \
 613     (void) elt;
 614 #define RESET_STIPPLE
 615 #define RESET_OCCLUSION
 616 #define PRESERVE_VB_DEFS
 617 #define ELT(x) x
 618 #define TAG(x) mga_##x##_verts
 619 #include "tnl/t_vb_rendertmp.h"
 620 #undef ELT
 621 #undef TAG
 622 #define TAG(x) mga_##x##_elts
 623 #define ELT(x) elt[x]
 624 #include "tnl/t_vb_rendertmp.h"
 625
 626
 627 /**********************************************************************/
 628 /*                   Render clipped primitives                        */
 629 /**********************************************************************/
 630
 631
 632
 633 static void mgaRenderClippedPoly( GLcontext *ctx, const GLuint *elts, GLuint n )
 634 {
 635    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 636    TNLcontext *tnl = TNL_CONTEXT(ctx);
 637    struct vertex_buffer *VB = &tnl->vb;
 638    GLuint prim = mmesa->render_primitive;
 639
 640    /* Render the new vertices as an unclipped polygon.
 641     */
 642    {
 643       GLuint *tmp = VB->Elts;
 644       VB->Elts = (GLuint *)elts;
 645       tnl->Driver.Render.PrimTabElts[GL_POLYGON]( ctx, 0, n, PRIM_BEGIN|PRIM_END );
 646       VB->Elts = tmp;
 647    }
 648
 649    /* Restore the render primitive
 650     */
 651    if (prim != GL_POLYGON)
 652       tnl->Driver.Render.PrimitiveNotify( ctx, prim );
 653 }
 654
 655 static void mgaRenderClippedLine( GLcontext *ctx, GLuint ii, GLuint jj )
 656 {
 657    TNLcontext *tnl = TNL_CONTEXT(ctx);
 658    tnl->Driver.Render.Line( ctx, ii, jj );
 659 }
 660
 661 static void mgaFastRenderClippedPoly( GLcontext *ctx, const GLuint *elts,
 662                                        GLuint n )
 663 {
 664    mgaContextPtr mmesa = MGA_CONTEXT( ctx );
 665    GLuint vertex_size = mmesa->vertex_size;
 666    GLuint *vb = mgaAllocDmaLow( mmesa, (n-2) * 3 * 4 * vertex_size );
 667    GLubyte *vertptr = (GLubyte *)mmesa->verts;
 668    const GLuint *start = (const GLuint *)VERT(elts[0]);
 669    int i,j;
 670
 671    for (i = 2 ; i < n ; i++) {
 672       EMIT_VERT( j, vb, vertex_size, (mgaVertexPtr) VERT(elts[i-1]) );
 673       EMIT_VERT( j, vb, vertex_size, (mgaVertexPtr) VERT(elts[i]) );
 674       EMIT_VERT( j, vb, vertex_size, (mgaVertexPtr) start );
 675    }
 676 }
 677
 678 /**********************************************************************/
 679 /*                    Choose render functions                         */
 680 /**********************************************************************/
 681
 682
 683 #define POINT_FALLBACK (DD_POINT_SMOOTH)
 684 #define LINE_FALLBACK (DD_LINE_SMOOTH | DD_LINE_STIPPLE)
 685 #define TRI_FALLBACK (DD_TRI_SMOOTH | DD_TRI_UNFILLED)
 686 #define ANY_FALLBACK_FLAGS (POINT_FALLBACK|LINE_FALLBACK|TRI_FALLBACK)
 687 #define ANY_RASTER_FLAGS (DD_FLATSHADE|DD_TRI_LIGHT_TWOSIDE|DD_TRI_OFFSET| \
 688                           DD_TRI_UNFILLED)
 689
 690 void mgaChooseRenderState(GLcontext *ctx)
 691 {
 692    TNLcontext *tnl = TNL_CONTEXT(ctx);
 693    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 694    GLuint flags = ctx->_TriangleCaps;
 695    GLuint index = 0;
 696
 697    if (flags & (ANY_FALLBACK_FLAGS|ANY_RASTER_FLAGS|DD_TRI_STIPPLE)) {
 698       if (flags & ANY_RASTER_FLAGS) {
 699          if (flags & DD_TRI_LIGHT_TWOSIDE)    index |= MGA_TWOSIDE_BIT;
 700          if (flags & DD_TRI_OFFSET)           index |= MGA_OFFSET_BIT;
 701          if (flags & DD_TRI_UNFILLED)         index |= MGA_UNFILLED_BIT;
 702          if (flags & DD_FLATSHADE)            index |= MGA_FLAT_BIT;
 703       }
 704
 705       mmesa->draw_point = mga_draw_point;
 706       mmesa->draw_line = mga_draw_line;
 707       mmesa->draw_tri = mga_draw_triangle;
 708
 709       /* Hook in fallbacks for specific primitives.
 710        */
 711       if (flags & ANY_FALLBACK_FLAGS)
 712       {
 713          if (flags & POINT_FALLBACK)
 714             mmesa->draw_point = mga_fallback_point;
 715
 716          if (flags & LINE_FALLBACK)
 717             mmesa->draw_line = mga_fallback_line;
 718
 719          if (flags & TRI_FALLBACK)
 720             mmesa->draw_tri = mga_fallback_tri;
 721
 722          index |= MGA_FALLBACK_BIT;
 723       }
 724
 725       if ((flags & DD_TRI_STIPPLE) && !mmesa->haveHwStipple) {
 726          mmesa->draw_tri = mga_fallback_tri;
 727          index |= MGA_FALLBACK_BIT;
 728       }
 729    }
 730
 731    if (mmesa->RenderIndex != index) {
 732       mmesa->RenderIndex = index;
 733
 734       tnl->Driver.Render.Points = rast_tab[index].points;
 735       tnl->Driver.Render.Line = rast_tab[index].line;
 736       tnl->Driver.Render.Triangle = rast_tab[index].triangle;
 737       tnl->Driver.Render.Quad = rast_tab[index].quad;
 738
 739       if (index == 0) {
 740          tnl->Driver.Render.PrimTabVerts = mga_render_tab_verts;
 741          tnl->Driver.Render.PrimTabElts = mga_render_tab_elts;
 742          tnl->Driver.Render.ClippedLine = line; /* from tritmp.h */
 743          tnl->Driver.Render.ClippedPolygon = mgaFastRenderClippedPoly;
 744       } else {
 745          tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
 746          tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
 747          tnl->Driver.Render.ClippedLine = mgaRenderClippedLine;
 748          tnl->Driver.Render.ClippedPolygon = mgaRenderClippedPoly;
 749       }
 750    }
 751 }
 752
 753 /**********************************************************************/
 754 /*                Runtime render state and callbacks                  */
 755 /**********************************************************************/
 756
 757
 758 static GLenum reduced_prim[GL_POLYGON+1] = {
 759    GL_POINTS,
 760    GL_LINES,
 761    GL_LINES,
 762    GL_LINES,
 763    GL_TRIANGLES,
 764    GL_TRIANGLES,
 765    GL_TRIANGLES,
 766    GL_TRIANGLES,
 767    GL_TRIANGLES,
 768    GL_TRIANGLES
 769 };
 770
 771
 772
 773 /* Always called between RenderStart and RenderFinish --> We already
 774  * hold the lock.
 775  */
 776 void mgaRasterPrimitive( GLcontext *ctx, GLenum prim, GLuint hwprim )
 777 {
 778    mgaContextPtr mmesa = MGA_CONTEXT( ctx );
 779
 780    FLUSH_BATCH( mmesa );
 781
 782    /* Update culling */
 783    if (mmesa->raster_primitive != prim)
 784       mmesa->dirty |= MGA_UPLOAD_CONTEXT;
 785
 786    mmesa->raster_primitive = prim;
 787 /*     mmesa->hw_primitive = hwprim; */
 788    mmesa->hw_primitive = MGA_WA_TRIANGLES; /* disable mgarender.c for now */
 789
 790    if (ctx->Polygon.StippleFlag && mmesa->haveHwStipple)
 791    {
 792       mmesa->dirty |= MGA_UPLOAD_CONTEXT;
 793       mmesa->setup.dwgctl &= ~(0xf<<20);
 794       if (mmesa->raster_primitive == GL_TRIANGLES)
 795          mmesa->setup.dwgctl |= mmesa->poly_stipple;
 796    }
 797 }
 798
 799
 800
 801 /* Determine the rasterized primitive when not drawing unfilled
 802  * polygons.
 803  *
 804  * Used only for the default render stage which always decomposes
 805  * primitives to trianges/lines/points.  For the accelerated stage,
 806  * which renders strips as strips, the equivalent calculations are
 807  * performed in mgarender.c.
 808  */
 809 static void mgaRenderPrimitive( GLcontext *ctx, GLenum prim )
 810 {
 811    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 812    GLuint rprim = reduced_prim[prim];
 813
 814    mmesa->render_primitive = prim;
 815
 816    if (rprim == GL_TRIANGLES && (ctx->_TriangleCaps & DD_TRI_UNFILLED))
 817       return;
 818
 819    if (mmesa->raster_primitive != rprim) {
 820       mgaRasterPrimitive( ctx, rprim, MGA_WA_TRIANGLES );
 821    }
 822 }
 823
 824 static void mgaRenderFinish( GLcontext *ctx )
 825 {
 826    if (MGA_CONTEXT(ctx)->RenderIndex & MGA_FALLBACK_BIT)
 827       _swrast_flush( ctx );
 828 }
 829
 830
 831
 832 /**********************************************************************/
 833 /*               Manage total rasterization fallbacks                 */
 834 /**********************************************************************/
 835
 836 static const char * const fallbackStrings[] = {
 837    "Texture mode",
 838    "glDrawBuffer(GL_FRONT_AND_BACK)",
 839    "read buffer",
 840    "glBlendFunc(GL_SRC_ALPHA_SATURATE, GL_ZERO)",
 841    "glRenderMode(selection or feedback)",
 842    "No hardware stencil",
 843    "glDepthFunc( GL_NEVER )",
 844    "Mixing GL_CLAMP_TO_EDGE and GL_CLAMP",
 845    "rasterization fallback option"
 846 };
 847
 848 static const char *getFallbackString(GLuint bit)
 849 {
 850    int i = 0;
 851    while (bit > 1) {
 852       i++;
 853       bit >>= 1;
 854    }
 855    return fallbackStrings[i];
 856 }
 857
 858
 859 void mgaFallback( GLcontext *ctx, GLuint bit, GLboolean mode )
 860 {
 861    TNLcontext *tnl = TNL_CONTEXT(ctx);
 862    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 863    GLuint oldfallback = mmesa->Fallback;
 864
 865    if (mode) {
 866       mmesa->Fallback |= bit;
 867       if (oldfallback == 0) {
 868          FLUSH_BATCH(mmesa);
 869          _swsetup_Wakeup( ctx );
 870          mmesa->RenderIndex = ~0;
 871          if (MGA_DEBUG & DEBUG_VERBOSE_FALLBACK) {
 872             fprintf(stderr, "MGA begin rasterization fallback: 0x%x %s\n",
 873                     bit, getFallbackString(bit));
 874          }
 875       }
 876    }
 877    else {
 878       mmesa->Fallback &= ~bit;
 879       if (oldfallback == bit) {
 880          _swrast_flush( ctx );
 881          tnl->Driver.Render.Start = mgaCheckTexSizes;
 882          tnl->Driver.Render.PrimitiveNotify = mgaRenderPrimitive;
 883          tnl->Driver.Render.Finish = mgaRenderFinish;
 884          tnl->Driver.Render.BuildVertices = mgaBuildVertices;
 885          mmesa->NewGLState |= (_MGA_NEW_RENDERSTATE |
 886                                _MGA_NEW_RASTERSETUP);
 887          if (MGA_DEBUG & DEBUG_VERBOSE_FALLBACK) {
 888             fprintf(stderr, "MGA end rasterization fallback: 0x%x %s\n",
 889                     bit, getFallbackString(bit));
 890          }
 891       }
 892    }
 893 }
 894
 895
 896 void mgaDDInitTriFuncs( GLcontext *ctx )
 897 {
 898    TNLcontext *tnl = TNL_CONTEXT(ctx);
 899    mgaContextPtr mmesa = MGA_CONTEXT(ctx);
 900    static int firsttime = 1;
 901    if (firsttime) {
 902       init_rast_tab();
 903       firsttime = 0;
 904    }
 905
 906    mmesa->RenderIndex = ~0;
 907
 908    tnl->Driver.Render.Start              = mgaCheckTexSizes;
 909    tnl->Driver.Render.Finish             = mgaRenderFinish;
 910    tnl->Driver.Render.PrimitiveNotify    = mgaRenderPrimitive;
 911    tnl->Driver.Render.ResetLineStipple   = _swrast_ResetLineStipple;
 912    tnl->Driver.Render.BuildVertices      = mgaBuildVertices;
 913    tnl->Driver.Render.Multipass          = NULL;
 914 }