src/mesa/drivers/dri/tdfx/tdfx_state.c

   1 /* -*- mode: c; c-basic-offset: 3 -*-
   2  *
   3  * Copyright 2000 VA Linux Systems Inc., Fremont, California.
   4  *
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * VA LINUX SYSTEMS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  23  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  */
  26 /* $XFree86: xc/lib/GL/mesa/src/drv/tdfx/tdfx_state.c,v 1.7 2002/10/30 12:52:00 alanh Exp $ */
  27
  28 /*
  29  * Original rewrite:
  30  *      Gareth Hughes <gareth@valinux.com>, 29 Sep - 1 Oct 2000
  31  *
  32  * Authors:
  33  *      Gareth Hughes <gareth@valinux.com>
  34  *      Brian Paul <brianp@valinux.com>
  35  *      Keith Whitwell <keith@tungstengraphics.com> (port to 3.5)
  36  *
  37  */
  38
  39 #include "mtypes.h"
  40 #include "colormac.h"
  41 #include "texformat.h"
  42 #include "texstore.h"
  43 #include "teximage.h"
  44
  45 #include "swrast/swrast.h"
  46 #include "array_cache/acache.h"
  47 #include "tnl/tnl.h"
  48 #include "tnl/t_pipeline.h"
  49 #include "swrast_setup/swrast_setup.h"
  50
  51 #include "tdfx_context.h"
  52 #include "tdfx_state.h"
  53 #include "tdfx_vb.h"
  54 #include "tdfx_tex.h"
  55 #include "tdfx_texman.h"
  56 #include "tdfx_texstate.h"
  57 #include "tdfx_tris.h"
  58 #include "tdfx_render.h"
  59
  60
  61
  62 /* =============================================================
  63  * Alpha blending
  64  */
  65
  66 static void tdfxUpdateAlphaMode( GLcontext *ctx )
  67 {
  68    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
  69    GrCmpFnc_t func;
  70    GrAlphaBlendFnc_t srcRGB, dstRGB, srcA, dstA;
  71    GrAlpha_t ref = (GLint) (ctx->Color.AlphaRef * 255.0);
  72
  73    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
  74       fprintf( stderr, "%s()\n", __FUNCTION__ );
  75    }
  76
  77    if ( ctx->Color.AlphaEnabled ) {
  78       switch ( ctx->Color.AlphaFunc ) {
  79       case GL_NEVER:
  80          func = GR_CMP_NEVER;
  81          break;
  82       case GL_LESS:
  83          func = GR_CMP_LESS;
  84          break;
  85       case GL_LEQUAL:
  86          func = GR_CMP_LEQUAL;
  87          break;
  88       case GL_EQUAL:
  89          func = GR_CMP_EQUAL;
  90          break;
  91       case GL_GEQUAL:
  92          func = GR_CMP_GEQUAL;
  93          break;
  94       case GL_GREATER:
  95          func = GR_CMP_GREATER;
  96          break;
  97       case GL_NOTEQUAL:
  98          func = GR_CMP_NOTEQUAL;
  99          break;
 100       case GL_ALWAYS:
 101       default:
 102          func = GR_CMP_ALWAYS;
 103          break;
 104       }
 105    } else {
 106       func = GR_CMP_ALWAYS;
 107    }
 108
 109    if ( ctx->Color.BlendEnabled
 110         && (fxMesa->Fallback & TDFX_FALLBACK_BLEND) == 0 ) {
 111       switch ( ctx->Color.BlendSrcRGB ) {
 112       case GL_ZERO:
 113          srcRGB = GR_BLEND_ZERO;
 114          break;
 115       case GL_ONE:
 116          srcRGB = GR_BLEND_ONE;
 117          break;
 118       case GL_DST_COLOR:
 119          srcRGB = GR_BLEND_DST_COLOR;
 120          break;
 121       case GL_ONE_MINUS_DST_COLOR:
 122          srcRGB = GR_BLEND_ONE_MINUS_DST_COLOR;
 123          break;
 124       case GL_SRC_ALPHA:
 125          srcRGB = GR_BLEND_SRC_ALPHA;
 126          break;
 127       case GL_ONE_MINUS_SRC_ALPHA:
 128          srcRGB = GR_BLEND_ONE_MINUS_SRC_ALPHA;
 129          break;
 130       case GL_DST_ALPHA:
 131          srcRGB = GR_BLEND_DST_ALPHA;
 132          break;
 133       case GL_ONE_MINUS_DST_ALPHA:
 134          srcRGB = GR_BLEND_ONE_MINUS_DST_ALPHA;
 135          break;
 136       case GL_SRC_ALPHA_SATURATE:
 137          srcRGB = GR_BLEND_ALPHA_SATURATE;
 138          break;
 139       default:
 140          srcRGB = GR_BLEND_ONE;
 141       }
 142
 143       switch ( ctx->Color.BlendSrcA ) {
 144       case GL_ZERO:
 145          srcA = GR_BLEND_ZERO;
 146          break;
 147       case GL_ONE:
 148          srcA = GR_BLEND_ONE;
 149          break;
 150       case GL_DST_COLOR:
 151          srcA = GR_BLEND_DST_ALPHA;  /* Napalm only */
 152          break;
 153       case GL_ONE_MINUS_DST_COLOR:
 154          srcA = GR_BLEND_ONE_MINUS_DST_ALPHA;  /* Napalm only */
 155          break;
 156       case GL_SRC_ALPHA:
 157          srcA = GR_BLEND_SRC_ALPHA;  /* Napalm only */
 158          break;
 159       case GL_ONE_MINUS_SRC_ALPHA:
 160          srcA = GR_BLEND_ONE_MINUS_SRC_ALPHA;  /* Napalm only */
 161          break;
 162       case GL_DST_ALPHA:
 163          srcA = GR_BLEND_DST_ALPHA;  /* Napalm only */
 164          break;
 165       case GL_ONE_MINUS_DST_ALPHA:
 166          srcA = GR_BLEND_ONE_MINUS_DST_ALPHA;  /* Napalm only */
 167          break;
 168       case GL_SRC_ALPHA_SATURATE:
 169          srcA = GR_BLEND_ONE;
 170          break;
 171       default:
 172          srcA = GR_BLEND_ONE;
 173       }
 174
 175       switch ( ctx->Color.BlendDstRGB ) {
 176       case GL_ZERO:
 177          dstRGB = GR_BLEND_ZERO;
 178          break;
 179       case GL_ONE:
 180          dstRGB = GR_BLEND_ONE;
 181          break;
 182       case GL_SRC_COLOR:
 183          dstRGB = GR_BLEND_SRC_COLOR;
 184          break;
 185       case GL_ONE_MINUS_SRC_COLOR:
 186          dstRGB = GR_BLEND_ONE_MINUS_SRC_COLOR;
 187          break;
 188       case GL_SRC_ALPHA:
 189          dstRGB = GR_BLEND_SRC_ALPHA;
 190          break;
 191       case GL_ONE_MINUS_SRC_ALPHA:
 192          dstRGB = GR_BLEND_ONE_MINUS_SRC_ALPHA;
 193          break;
 194       case GL_DST_ALPHA:
 195          dstRGB = GR_BLEND_DST_ALPHA;
 196          break;
 197       case GL_ONE_MINUS_DST_ALPHA:
 198          dstRGB = GR_BLEND_ONE_MINUS_DST_ALPHA;
 199          break;
 200       default:
 201          dstRGB = GR_BLEND_ZERO;
 202       }
 203
 204       switch ( ctx->Color.BlendDstA ) {
 205       case GL_ZERO:
 206          dstA = GR_BLEND_ZERO;
 207          break;
 208       case GL_ONE:
 209          dstA = GR_BLEND_ONE;
 210          break;
 211       case GL_SRC_COLOR:
 212          dstA = GR_BLEND_SRC_ALPHA;  /* Napalm only */
 213          break;
 214       case GL_ONE_MINUS_SRC_COLOR:
 215          dstA = GR_BLEND_ONE_MINUS_SRC_ALPHA;  /* Napalm only */
 216          break;
 217       case GL_SRC_ALPHA:
 218          dstA = GR_BLEND_SRC_ALPHA;  /* Napalm only */
 219          break;
 220       case GL_ONE_MINUS_SRC_ALPHA:
 221          dstA = GR_BLEND_ONE_MINUS_SRC_ALPHA;  /* Napalm only */
 222          break;
 223       case GL_DST_ALPHA:
 224          dstA = GR_BLEND_DST_ALPHA;  /* Napalm only */
 225          break;
 226       case GL_ONE_MINUS_DST_ALPHA:
 227          dstA = GR_BLEND_ONE_MINUS_DST_ALPHA;  /* Napalm only */
 228          break;
 229       default:
 230          dstA = GR_BLEND_ZERO;
 231       }
 232    } else {
 233       /* blend disabled */
 234       srcRGB = GR_BLEND_ONE;
 235       dstRGB = GR_BLEND_ZERO;
 236       srcA = GR_BLEND_ONE;
 237       dstA = GR_BLEND_ZERO;
 238    }
 239
 240    if ( fxMesa->Color.AlphaFunc != func ) {
 241       fxMesa->Color.AlphaFunc = func;
 242       fxMesa->dirty |= TDFX_UPLOAD_ALPHA_TEST;
 243    }
 244    if ( fxMesa->Color.AlphaRef != ref ) {
 245       fxMesa->Color.AlphaRef = ref;
 246       fxMesa->dirty |= TDFX_UPLOAD_ALPHA_REF;
 247    }
 248
 249    if ( fxMesa->Color.BlendSrcRGB != srcRGB ||
 250         fxMesa->Color.BlendDstRGB != dstRGB ||
 251         fxMesa->Color.BlendSrcA != srcA ||
 252         fxMesa->Color.BlendDstA != dstA )
 253    {
 254       fxMesa->Color.BlendSrcRGB = srcRGB;
 255       fxMesa->Color.BlendDstRGB = dstRGB;
 256       fxMesa->Color.BlendSrcA = srcA;
 257       fxMesa->Color.BlendDstA = dstA;
 258       fxMesa->dirty |= TDFX_UPLOAD_BLEND_FUNC;
 259    }
 260 }
 261
 262 static void tdfxDDAlphaFunc( GLcontext *ctx, GLenum func, GLfloat ref )
 263 {
 264    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 265
 266    FLUSH_BATCH( fxMesa );
 267    fxMesa->new_state |= TDFX_NEW_ALPHA;
 268 }
 269
 270 static void tdfxDDBlendEquationSeparate( GLcontext *ctx,
 271                                          GLenum modeRGB, GLenum modeA )
 272 {
 273    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 274
 275    assert( modeRGB == modeA );
 276    FLUSH_BATCH( fxMesa );
 277    fxMesa->new_state |= TDFX_NEW_ALPHA;
 278 }
 279
 280 static void tdfxDDBlendFuncSeparate( GLcontext *ctx,
 281                                      GLenum sfactorRGB, GLenum dfactorRGB,
 282                                      GLenum sfactorA, GLenum dfactorA )
 283 {
 284    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 285
 286    FLUSH_BATCH( fxMesa );
 287    fxMesa->new_state |= TDFX_NEW_ALPHA;
 288
 289    /*
 290     * XXX - Voodoo5 seems to suffer from precision problems in some
 291     * blend modes.  To pass all the conformance tests we'd have to
 292     * fall back to software for many modes.  Revisit someday.
 293     */
 294 }
 295
 296 /* =============================================================
 297  * Stipple
 298  */
 299
 300 void tdfxUpdateStipple( GLcontext *ctx )
 301 {
 302    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 303    GrStippleMode_t mode = GR_STIPPLE_DISABLE;
 304
 305    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
 306       fprintf( stderr, "%s()\n", __FUNCTION__ );
 307    }
 308
 309    FLUSH_BATCH( fxMesa );
 310
 311    if (ctx->Polygon.StippleFlag) {
 312       mode = GR_STIPPLE_PATTERN;
 313    }
 314
 315    if ( fxMesa->Stipple.Mode != mode ) {
 316       fxMesa->Stipple.Mode = mode;
 317       fxMesa->dirty |= TDFX_UPLOAD_STIPPLE;
 318    }
 319 }
 320
 321
 322 /* =============================================================
 323  * Depth testing
 324  */
 325
 326 static void tdfxUpdateZMode( GLcontext *ctx )
 327 {
 328    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 329    GrCmpFnc_t func;
 330    FxI32 bias;
 331    FxBool mask;
 332
 333    if ( TDFX_DEBUG & DEBUG_VERBOSE_API )
 334       fprintf( stderr, "%s()\n", __FUNCTION__ );
 335
 336
 337    bias = (FxI32) (ctx->Polygon.OffsetUnits * TDFX_DEPTH_BIAS_SCALE);
 338
 339    if ( ctx->Depth.Test ) {
 340       switch ( ctx->Depth.Func ) {
 341       case GL_NEVER:
 342          func = GR_CMP_NEVER;
 343          break;
 344       case GL_LESS:
 345          func = GR_CMP_LESS;
 346          break;
 347       case GL_LEQUAL:
 348          func = GR_CMP_LEQUAL;
 349          break;
 350       case GL_EQUAL:
 351          func = GR_CMP_EQUAL;
 352          break;
 353       case GL_GEQUAL:
 354          func = GR_CMP_GEQUAL;
 355          break;
 356       case GL_GREATER:
 357          func = GR_CMP_GREATER;
 358          break;
 359       case GL_NOTEQUAL:
 360          func = GR_CMP_NOTEQUAL;
 361          break;
 362       case GL_ALWAYS:
 363       default:
 364          func = GR_CMP_ALWAYS;
 365          break;
 366       }
 367
 368       if ( ctx->Depth.Mask ) {
 369          mask = FXTRUE;
 370       }
 371       else {
 372          mask = FXFALSE;
 373       }
 374    }
 375    else {
 376       /* depth testing disabled */
 377       func = GR_CMP_ALWAYS;  /* fragments always pass */
 378       mask = FXFALSE;        /* zbuffer is not touched */
 379    }
 380
 381    fxMesa->Depth.Clear = (FxU32) (((1 << fxMesa->glCtx->Visual.depthBits) - 1)
 382                                   * ctx->Depth.Clear);
 383
 384    if ( fxMesa->Depth.Bias != bias ) {
 385       fxMesa->Depth.Bias = bias;
 386       fxMesa->dirty |= TDFX_UPLOAD_DEPTH_BIAS;
 387    }
 388    if ( fxMesa->Depth.Func != func ) {
 389       fxMesa->Depth.Func = func;
 390       fxMesa->dirty |= TDFX_UPLOAD_DEPTH_FUNC | TDFX_UPLOAD_DEPTH_MASK;
 391    }
 392    if ( fxMesa->Depth.Mask != mask ) {
 393       fxMesa->Depth.Mask = mask;
 394       fxMesa->dirty |= TDFX_UPLOAD_DEPTH_MASK;
 395    }
 396 }
 397
 398 static void tdfxDDDepthFunc( GLcontext *ctx, GLenum func )
 399 {
 400    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 401
 402    FLUSH_BATCH( fxMesa );
 403    fxMesa->new_state |= TDFX_NEW_DEPTH;
 404 }
 405
 406 static void tdfxDDDepthMask( GLcontext *ctx, GLboolean flag )
 407 {
 408    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 409
 410    FLUSH_BATCH( fxMesa );
 411    fxMesa->new_state |= TDFX_NEW_DEPTH;
 412 }
 413
 414 static void tdfxDDClearDepth( GLcontext *ctx, GLclampd d )
 415 {
 416    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 417
 418    FLUSH_BATCH( fxMesa );
 419    fxMesa->new_state |= TDFX_NEW_DEPTH;
 420 }
 421
 422
 423
 424 /* =============================================================
 425  * Stencil
 426  */
 427
 428
 429 /* Evaluate all stencil state and make the Glide calls.
 430  */
 431 static GrStencil_t convertGLStencilOp( GLenum op )
 432 {
 433    switch ( op ) {
 434    case GL_KEEP:
 435       return GR_STENCILOP_KEEP;
 436    case GL_ZERO:
 437       return GR_STENCILOP_ZERO;
 438    case GL_REPLACE:
 439       return GR_STENCILOP_REPLACE;
 440    case GL_INCR:
 441       return GR_STENCILOP_INCR_CLAMP;
 442    case GL_DECR:
 443       return GR_STENCILOP_DECR_CLAMP;
 444    case GL_INVERT:
 445       return GR_STENCILOP_INVERT;
 446    case GL_INCR_WRAP_EXT:
 447       return GR_STENCILOP_INCR_WRAP;
 448    case GL_DECR_WRAP_EXT:
 449       return GR_STENCILOP_DECR_WRAP;
 450    default:
 451       _mesa_problem( NULL, "bad stencil op in convertGLStencilOp" );
 452    }
 453    return GR_STENCILOP_KEEP;   /* never get, silence compiler warning */
 454 }
 455
 456
 457 static void tdfxUpdateStencil( GLcontext *ctx )
 458 {
 459    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 460
 461    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
 462       fprintf( stderr, "%s()\n", __FUNCTION__ );
 463    }
 464
 465    if (fxMesa->haveHwStencil) {
 466       if (ctx->Stencil.Enabled) {
 467          fxMesa->Stencil.Function = ctx->Stencil.Function[0] - GL_NEVER;
 468          fxMesa->Stencil.RefValue = ctx->Stencil.Ref[0];
 469          fxMesa->Stencil.ValueMask = ctx->Stencil.ValueMask[0];
 470          fxMesa->Stencil.WriteMask = ctx->Stencil.WriteMask[0];
 471          fxMesa->Stencil.FailFunc = convertGLStencilOp(ctx->Stencil.FailFunc[0]);
 472          fxMesa->Stencil.ZFailFunc = convertGLStencilOp(ctx->Stencil.ZFailFunc[0]);
 473          fxMesa->Stencil.ZPassFunc = convertGLStencilOp(ctx->Stencil.ZPassFunc[0]);
 474          fxMesa->Stencil.Clear = ctx->Stencil.Clear & 0xff;
 475       }
 476       fxMesa->dirty |= TDFX_UPLOAD_STENCIL;
 477    }
 478 }
 479
 480
 481 static void tdfxDDStencilFunc( GLcontext *ctx, GLenum func,
 482                                GLint ref, GLuint mask )
 483 {
 484    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 485
 486    FLUSH_BATCH( fxMesa );
 487    fxMesa->new_state |= TDFX_NEW_STENCIL;
 488 }
 489
 490 static void tdfxDDStencilMask( GLcontext *ctx, GLuint mask )
 491 {
 492    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 493
 494    FLUSH_BATCH( fxMesa );
 495    fxMesa->new_state |= TDFX_NEW_STENCIL;
 496 }
 497
 498 static void tdfxDDStencilOp( GLcontext *ctx, GLenum sfail,
 499                              GLenum zfail, GLenum zpass )
 500 {
 501    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 502
 503    FLUSH_BATCH( fxMesa );
 504    fxMesa->new_state |= TDFX_NEW_STENCIL;
 505 }
 506
 507
 508 /* =============================================================
 509  * Fog - orthographic fog still not working
 510  */
 511
 512 static void tdfxUpdateFogAttrib( GLcontext *ctx )
 513 {
 514    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 515    GrFogMode_t mode;
 516    GrColor_t color;
 517
 518    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
 519       fprintf( stderr, "%s()\n", __FUNCTION__ );
 520    }
 521
 522    if ( ctx->Fog.Enabled ) {
 523       mode = GR_FOG_WITH_TABLE_ON_Q;
 524    } else {
 525       mode = GR_FOG_DISABLE;
 526    }
 527
 528    color = TDFXPACKCOLOR888((GLubyte)(ctx->Fog.Color[0]*255.0F),
 529                             (GLubyte)(ctx->Fog.Color[1]*255.0F),
 530                             (GLubyte)(ctx->Fog.Color[2]*255.0F));
 531
 532    if ( fxMesa->Fog.Mode != mode ) {
 533       fxMesa->Fog.Mode = mode;
 534       fxMesa->dirty |= TDFX_UPLOAD_FOG_MODE;
 535    }
 536    if ( fxMesa->Fog.Color != color ) {
 537       fxMesa->Fog.Color = color;
 538       fxMesa->dirty |= TDFX_UPLOAD_FOG_COLOR;
 539    }
 540    if ( fxMesa->Fog.TableMode != ctx->Fog.Mode ||
 541         fxMesa->Fog.Density != ctx->Fog.Density ||
 542         fxMesa->Fog.Near != ctx->Fog.Start ||
 543         fxMesa->Fog.Far != ctx->Fog.End )
 544    {
 545       switch( ctx->Fog.Mode ) {
 546       case GL_EXP:
 547          fxMesa->Glide.guFogGenerateExp( fxMesa->Fog.Table, ctx->Fog.Density );
 548          break;
 549       case GL_EXP2:
 550          fxMesa->Glide.guFogGenerateExp2( fxMesa->Fog.Table, ctx->Fog.Density);
 551          break;
 552       case GL_LINEAR:
 553          fxMesa->Glide.guFogGenerateLinear( fxMesa->Fog.Table,
 554                                             ctx->Fog.Start, ctx->Fog.End );
 555          break;
 556       }
 557
 558       fxMesa->Fog.TableMode = ctx->Fog.Mode;
 559       fxMesa->Fog.Density = ctx->Fog.Density;
 560       fxMesa->Fog.Near = ctx->Fog.Start;
 561       fxMesa->Fog.Far = ctx->Fog.End;
 562       fxMesa->dirty |= TDFX_UPLOAD_FOG_TABLE;
 563    }
 564 }
 565
 566 static void tdfxDDFogfv( GLcontext *ctx, GLenum pname, const GLfloat *param )
 567 {
 568    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 569
 570    FLUSH_BATCH( fxMesa );
 571    fxMesa->new_state |= TDFX_NEW_FOG;
 572 }
 573
 574
 575 /* =============================================================
 576  * Clipping
 577  */
 578
 579 static int intersect_rect( drm_clip_rect_t *out,
 580                            const drm_clip_rect_t *a,
 581                            const drm_clip_rect_t *b)
 582 {
 583    *out = *a;
 584    if (b->x1 > out->x1) out->x1 = b->x1;
 585    if (b->y1 > out->y1) out->y1 = b->y1;
 586    if (b->x2 < out->x2) out->x2 = b->x2;
 587    if (b->y2 < out->y2) out->y2 = b->y2;
 588    if (out->x1 >= out->x2) return 0;
 589    if (out->y1 >= out->y2) return 0;
 590    return 1;
 591 }
 592
 593
 594 /*
 595  * Examine XF86 cliprect list and scissor state to recompute our
 596  * cliprect list.
 597  */
 598 void tdfxUpdateClipping( GLcontext *ctx )
 599 {
 600    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 601    __DRIdrawablePrivate *dPriv = fxMesa->driDrawable;
 602
 603    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
 604       fprintf( stderr, "%s()\n", __FUNCTION__ );
 605    }
 606
 607    assert(ctx);
 608    assert(fxMesa);
 609    assert(dPriv);
 610
 611    if ( dPriv->x != fxMesa->x_offset || dPriv->y != fxMesa->y_offset ||
 612         dPriv->w != fxMesa->width || dPriv->h != fxMesa->height ) {
 613       fxMesa->x_offset = dPriv->x;
 614       fxMesa->y_offset = dPriv->y;
 615       fxMesa->width = dPriv->w;
 616       fxMesa->height = dPriv->h;
 617       fxMesa->y_delta =
 618          fxMesa->screen_height - fxMesa->y_offset - fxMesa->height;
 619       tdfxUpdateViewport( ctx );
 620    }
 621
 622    if (fxMesa->scissoredClipRects && fxMesa->pClipRects) {
 623       free(fxMesa->pClipRects);
 624    }
 625
 626    if (ctx->Scissor.Enabled) {
 627       /* intersect OpenGL scissor box with all cliprects to make a new
 628        * list of cliprects.
 629        */
 630       drm_clip_rect_t scissor;
 631       int x1 = ctx->Scissor.X + fxMesa->x_offset;
 632       int y1 = fxMesa->screen_height - fxMesa->y_delta
 633              - ctx->Scissor.Y - ctx->Scissor.Height;
 634       int x2 = x1 + ctx->Scissor.Width;
 635       int y2 = y1 + ctx->Scissor.Height;
 636       scissor.x1 = MAX2(x1, 0);
 637       scissor.y1 = MAX2(y1, 0);
 638       scissor.x2 = MAX2(x2, 0);
 639       scissor.y2 = MAX2(y2, 0);
 640
 641       assert(scissor.x2 >= scissor.x1);
 642       assert(scissor.y2 >= scissor.y1);
 643
 644       fxMesa->pClipRects = malloc(dPriv->numClipRects
 645                                   * sizeof(drm_clip_rect_t));
 646       if (fxMesa->pClipRects) {
 647          int i;
 648          fxMesa->numClipRects = 0;
 649          for (i = 0; i < dPriv->numClipRects; i++) {
 650             if (intersect_rect(&fxMesa->pClipRects[fxMesa->numClipRects],
 651                                &scissor, &dPriv->pClipRects[i])) {
 652                fxMesa->numClipRects++;
 653             }
 654          }
 655          fxMesa->scissoredClipRects = GL_TRUE;
 656       }
 657       else {
 658          /* out of memory, forgo scissor */
 659          fxMesa->numClipRects = dPriv->numClipRects;
 660          fxMesa->pClipRects = dPriv->pClipRects;
 661          fxMesa->scissoredClipRects = GL_FALSE;
 662       }
 663    }
 664    else {
 665       fxMesa->numClipRects = dPriv->numClipRects;
 666       fxMesa->pClipRects = dPriv->pClipRects;
 667       fxMesa->scissoredClipRects = GL_FALSE;
 668    }
 669
 670    fxMesa->dirty |= TDFX_UPLOAD_CLIP;
 671 }
 672
 673
 674
 675 /* =============================================================
 676  * Culling
 677  */
 678
 679 void tdfxUpdateCull( GLcontext *ctx )
 680 {
 681    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 682    GrCullMode_t mode = GR_CULL_DISABLE;
 683
 684    /* KW: don't need to check raster_primitive here as we don't
 685     * attempt to draw lines or points with triangles.
 686     */
 687    if ( ctx->Polygon.CullFlag ) {
 688       switch ( ctx->Polygon.CullFaceMode ) {
 689       case GL_FRONT:
 690          if ( ctx->Polygon.FrontFace == GL_CCW ) {
 691             mode = GR_CULL_POSITIVE;
 692          } else {
 693             mode = GR_CULL_NEGATIVE;
 694          }
 695          break;
 696
 697       case GL_BACK:
 698          if ( ctx->Polygon.FrontFace == GL_CCW ) {
 699             mode = GR_CULL_NEGATIVE;
 700          } else {
 701             mode = GR_CULL_POSITIVE;
 702          }
 703          break;
 704
 705       case GL_FRONT_AND_BACK:
 706          /* Handled as a fallback on triangles in tdfx_tris.c */
 707          return;
 708
 709       default:
 710          ASSERT(0);
 711          break;
 712       }
 713    }
 714
 715    if ( fxMesa->CullMode != mode ) {
 716       fxMesa->CullMode = mode;
 717       fxMesa->dirty |= TDFX_UPLOAD_CULL;
 718    }
 719 }
 720
 721 static void tdfxDDCullFace( GLcontext *ctx, GLenum mode )
 722 {
 723    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 724
 725    FLUSH_BATCH( fxMesa );
 726    fxMesa->new_state |= TDFX_NEW_CULL;
 727 }
 728
 729 static void tdfxDDFrontFace( GLcontext *ctx, GLenum mode )
 730 {
 731    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 732
 733    FLUSH_BATCH( fxMesa );
 734    fxMesa->new_state |= TDFX_NEW_CULL;
 735 }
 736
 737
 738 /* =============================================================
 739  * Line drawing.
 740  */
 741
 742 static void tdfxUpdateLine( GLcontext *ctx )
 743 {
 744    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 745
 746    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
 747       fprintf( stderr, "%s()\n", __FUNCTION__ );
 748    }
 749
 750    FLUSH_BATCH( fxMesa );
 751    fxMesa->dirty |= TDFX_UPLOAD_LINE;
 752 }
 753
 754
 755 static void tdfxDDLineWidth( GLcontext *ctx, GLfloat width )
 756 {
 757    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 758    FLUSH_BATCH( fxMesa );
 759    fxMesa->new_state |= TDFX_NEW_LINE;
 760 }
 761
 762
 763 /* =============================================================
 764  * Color Attributes
 765  */
 766
 767 static void tdfxDDColorMask( GLcontext *ctx,
 768                              GLboolean r, GLboolean g,
 769                              GLboolean b, GLboolean a )
 770 {
 771    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 772
 773    FLUSH_BATCH( fxMesa );
 774
 775    if ( fxMesa->Color.ColorMask[RCOMP] != r ||
 776         fxMesa->Color.ColorMask[GCOMP] != g ||
 777         fxMesa->Color.ColorMask[BCOMP] != b ||
 778         fxMesa->Color.ColorMask[ACOMP] != a ) {
 779       fxMesa->Color.ColorMask[RCOMP] = r;
 780       fxMesa->Color.ColorMask[GCOMP] = g;
 781       fxMesa->Color.ColorMask[BCOMP] = b;
 782       fxMesa->Color.ColorMask[ACOMP] = a;
 783       fxMesa->dirty |= TDFX_UPLOAD_COLOR_MASK;
 784
 785       if (ctx->Visual.redBits < 8) {
 786          /* Can't do RGB colormasking in 16bpp mode. */
 787          /* We can completely ignore the alpha mask. */
 788          FALLBACK( fxMesa, TDFX_FALLBACK_COLORMASK, (r != g || g != b) );
 789       }
 790    }
 791 }
 792
 793
 794 static void tdfxDDClearColor( GLcontext *ctx,
 795                               const GLfloat color[4] )
 796 {
 797    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 798    GLubyte c[4];
 799    FLUSH_BATCH( fxMesa );
 800    CLAMPED_FLOAT_TO_UBYTE(c[0], color[0]);
 801    CLAMPED_FLOAT_TO_UBYTE(c[1], color[1]);
 802    CLAMPED_FLOAT_TO_UBYTE(c[2], color[2]);
 803    CLAMPED_FLOAT_TO_UBYTE(c[3], color[3]);
 804    fxMesa->Color.ClearColor = TDFXPACKCOLOR888( c[0], c[1], c[2] );
 805    fxMesa->Color.ClearAlpha = c[3];
 806 }
 807
 808
 809 /* =============================================================
 810  * Light Model
 811  */
 812
 813 static void tdfxDDLightModelfv( GLcontext *ctx, GLenum pname,
 814                                 const GLfloat *param )
 815 {
 816    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 817
 818    if ( pname == GL_LIGHT_MODEL_COLOR_CONTROL ) {
 819       FALLBACK( fxMesa, TDFX_FALLBACK_SPECULAR,
 820                 (ctx->Light.Enabled &&
 821                  ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR ));
 822    }
 823 }
 824
 825 static void tdfxDDShadeModel( GLcontext *ctx, GLenum mode )
 826 {
 827    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 828
 829    /* FIXME: Can we implement native flat shading? */
 830    FLUSH_BATCH( fxMesa );
 831    fxMesa->new_state |= TDFX_NEW_TEXTURE;
 832 }
 833
 834
 835 /* =============================================================
 836  * Scissor
 837  */
 838
 839 static void
 840 tdfxDDScissor(GLcontext * ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 841 {
 842    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 843    FLUSH_BATCH( fxMesa );
 844    fxMesa->new_state |= TDFX_NEW_CLIP;
 845 }
 846
 847 /* =============================================================
 848  * Render
 849  */
 850
 851 static void tdfxUpdateRenderAttrib( GLcontext *ctx )
 852 {
 853    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 854    FLUSH_BATCH( fxMesa );
 855    fxMesa->dirty |= TDFX_UPLOAD_RENDER_BUFFER;
 856 }
 857
 858 /* =============================================================
 859  * Viewport
 860  */
 861
 862 void tdfxUpdateViewport( GLcontext *ctx )
 863 {
 864    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 865    const GLfloat *v = ctx->Viewport._WindowMap.m;
 866    GLfloat *m = fxMesa->hw_viewport;
 867
 868    m[MAT_SX] = v[MAT_SX];
 869    m[MAT_TX] = v[MAT_TX] + fxMesa->x_offset + TRI_X_OFFSET;
 870    m[MAT_SY] = v[MAT_SY];
 871    m[MAT_TY] = v[MAT_TY] + fxMesa->y_delta + TRI_Y_OFFSET;
 872    m[MAT_SZ] = v[MAT_SZ];
 873    m[MAT_TZ] = v[MAT_TZ];
 874
 875    fxMesa->SetupNewInputs |= VERT_BIT_POS;
 876 }
 877
 878
 879 static void tdfxDDViewport( GLcontext *ctx, GLint x, GLint y,
 880                             GLsizei w, GLsizei h )
 881 {
 882    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 883    FLUSH_BATCH( fxMesa );
 884    fxMesa->new_state |= TDFX_NEW_VIEWPORT;
 885 }
 886
 887
 888 static void tdfxDDDepthRange( GLcontext *ctx, GLclampd nearVal, GLclampd farVal )
 889 {
 890    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 891    FLUSH_BATCH( fxMesa );
 892    fxMesa->new_state |= TDFX_NEW_VIEWPORT;
 893 }
 894
 895
 896 /* =============================================================
 897  * State enable/disable
 898  */
 899
 900 static void tdfxDDEnable( GLcontext *ctx, GLenum cap, GLboolean state )
 901 {
 902    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 903
 904    switch ( cap ) {
 905    case GL_ALPHA_TEST:
 906       FLUSH_BATCH( fxMesa );
 907       fxMesa->new_state |= TDFX_NEW_ALPHA;
 908       break;
 909
 910    case GL_BLEND:
 911       FLUSH_BATCH( fxMesa );
 912       fxMesa->new_state |= TDFX_NEW_ALPHA;
 913       FALLBACK( fxMesa, TDFX_FALLBACK_LOGICOP,
 914                 (ctx->Color.ColorLogicOpEnabled &&
 915                  ctx->Color.LogicOp != GL_COPY));
 916       break;
 917
 918    case GL_CULL_FACE:
 919       FLUSH_BATCH( fxMesa );
 920       fxMesa->new_state |= TDFX_NEW_CULL;
 921       break;
 922
 923    case GL_DEPTH_TEST:
 924       FLUSH_BATCH( fxMesa );
 925       fxMesa->new_state |= TDFX_NEW_DEPTH;
 926       break;
 927
 928    case GL_DITHER:
 929       FLUSH_BATCH( fxMesa );
 930       if ( state ) {
 931          fxMesa->Color.Dither = GR_DITHER_2x2;
 932       } else {
 933          fxMesa->Color.Dither = GR_DITHER_DISABLE;
 934       }
 935       fxMesa->dirty |= TDFX_UPLOAD_DITHER;
 936       break;
 937
 938    case GL_FOG:
 939       FLUSH_BATCH( fxMesa );
 940       fxMesa->new_state |= TDFX_NEW_FOG;
 941       break;
 942
 943    case GL_COLOR_LOGIC_OP:
 944       FALLBACK( fxMesa, TDFX_FALLBACK_LOGICOP,
 945                 (ctx->Color.ColorLogicOpEnabled &&
 946                  ctx->Color.LogicOp != GL_COPY));
 947       break;
 948
 949    case GL_LIGHTING:
 950       FALLBACK( fxMesa, TDFX_FALLBACK_SPECULAR,
 951                 (ctx->Light.Enabled &&
 952                  ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR ));
 953       break;
 954
 955    case GL_LINE_SMOOTH:
 956       FLUSH_BATCH( fxMesa );
 957       fxMesa->new_state |= TDFX_NEW_LINE;
 958       break;
 959
 960    case GL_LINE_STIPPLE:
 961       FALLBACK(fxMesa, TDFX_FALLBACK_LINE_STIPPLE, state);
 962       break;
 963
 964    case GL_POLYGON_STIPPLE:
 965       FLUSH_BATCH(fxMesa);
 966       fxMesa->new_state |= TDFX_NEW_STIPPLE;
 967       break;
 968
 969    case GL_SCISSOR_TEST:
 970       FLUSH_BATCH( fxMesa );
 971       fxMesa->new_state |= TDFX_NEW_CLIP;
 972       break;
 973
 974    case GL_STENCIL_TEST:
 975       FLUSH_BATCH( fxMesa );
 976       FALLBACK( fxMesa, TDFX_FALLBACK_STENCIL, state && !fxMesa->haveHwStencil);
 977       break;
 978
 979    case GL_TEXTURE_1D:
 980    case GL_TEXTURE_3D:
 981       FLUSH_BATCH( fxMesa );
 982       FALLBACK( fxMesa, TDFX_FALLBACK_TEXTURE_1D_3D, state); /* wrong */
 983       fxMesa->new_state |= TDFX_NEW_TEXTURE;
 984       break;
 985
 986    case GL_TEXTURE_2D:
 987       FLUSH_BATCH( fxMesa );
 988       fxMesa->new_state |= TDFX_NEW_TEXTURE;
 989       break;
 990
 991    default:
 992       return;
 993    }
 994 }
 995
 996
 997
 998 /* Set the buffer used for drawing */
 999 /* XXX support for separate read/draw buffers hasn't been tested */
1000 static void tdfxDDDrawBuffer( GLcontext *ctx, GLenum mode )
1001 {
1002    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
1003
1004    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
1005       fprintf( stderr, "%s()\n", __FUNCTION__ );
1006    }
1007
1008    FLUSH_BATCH( fxMesa );
1009
1010    /*
1011     * _DrawDestMask is easier to cope with than <mode>.
1012     */
1013    switch ( ctx->Color._DrawDestMask ) {
1014    case FRONT_LEFT_BIT:
1015       fxMesa->DrawBuffer = fxMesa->ReadBuffer = GR_BUFFER_FRONTBUFFER;
1016       fxMesa->new_state |= TDFX_NEW_RENDER;
1017       FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_FALSE );
1018       break;
1019    case BACK_LEFT_BIT:
1020       fxMesa->DrawBuffer = fxMesa->ReadBuffer = GR_BUFFER_BACKBUFFER;
1021       fxMesa->new_state |= TDFX_NEW_RENDER;
1022       FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_FALSE );
1023       break;
1024    case 0:
1025       FX_grColorMaskv( ctx, false4 );
1026       FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_FALSE );
1027       break;
1028    default:
1029       FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_TRUE );
1030       break;
1031    }
1032
1033    /* We want to update the s/w rast state too so that tdfxDDSetBuffer()
1034     * gets called.
1035     */
1036    _swrast_DrawBuffer(ctx, mode);
1037 }
1038
1039
1040 static void tdfxDDReadBuffer( GLcontext *ctx, GLenum mode )
1041 {
1042    /* XXX ??? */
1043 }
1044
1045
1046 /* =============================================================
1047  * Polygon stipple
1048  */
1049
1050 static void tdfxDDPolygonStipple( GLcontext *ctx, const GLubyte *mask )
1051 {
1052    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
1053    const GLubyte *m = mask;
1054    GLubyte q[4];
1055    int i,j,k;
1056    GLboolean allBitsSet;
1057
1058 /*     int active = (ctx->Polygon.StippleFlag &&  */
1059 /*               fxMesa->reduced_prim == GL_TRIANGLES); */
1060
1061    FLUSH_BATCH(fxMesa);
1062    fxMesa->Stipple.Pattern = 0xffffffff;
1063    fxMesa->dirty |= TDFX_UPLOAD_STIPPLE;
1064    fxMesa->new_state |= TDFX_NEW_STIPPLE;
1065
1066    /* Check if the stipple pattern is fully opaque.  If so, use software
1067     * rendering.  This basically a trick to make sure the OpenGL conformance
1068     * test passes.
1069     */
1070    allBitsSet = GL_TRUE;
1071    for (i = 0; i < 32; i++) {
1072       if (((GLuint *) mask)[i] != 0xffffffff) {
1073          allBitsSet = GL_FALSE;
1074          break;
1075       }
1076    }
1077    if (allBitsSet) {
1078       fxMesa->haveHwStipple = GL_FALSE;
1079       return;
1080    }
1081
1082    q[0] = mask[0];
1083    q[1] = mask[4];
1084    q[2] = mask[8];
1085    q[3] = mask[12];
1086
1087    for (k = 0 ; k < 8 ; k++)
1088       for (j = 0 ; j < 4; j++)
1089          for (i = 0 ; i < 4 ; i++,m++) {
1090             if (*m != q[j]) {
1091                fxMesa->haveHwStipple = GL_FALSE;
1092                return;
1093             }
1094          }
1095
1096    fxMesa->haveHwStipple = GL_TRUE;
1097    fxMesa->Stipple.Pattern = ( (q[0] << 0) |
1098                                (q[1] << 8) |
1099                                (q[2] << 16) |
1100                                (q[3] << 24) );
1101 }
1102
1103
1104
1105 static void tdfxDDRenderMode( GLcontext *ctx, GLenum mode )
1106 {
1107    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
1108    FALLBACK( fxMesa, TDFX_FALLBACK_RENDER_MODE, (mode != GL_RENDER) );
1109 }
1110
1111
1112
1113 static void tdfxDDPrintState( const char *msg, GLuint flags )
1114 {
1115    fprintf( stderr,
1116             "%s: (0x%x) %s%s%s%s%s%s%s%s%s%s%s%s%s\n",
1117             msg,
1118             flags,
1119             (flags & TDFX_NEW_COLOR) ? "color, " : "",
1120             (flags & TDFX_NEW_ALPHA) ? "alpha, " : "",
1121             (flags & TDFX_NEW_DEPTH) ? "depth, " : "",
1122             (flags & TDFX_NEW_RENDER) ? "render, " : "",
1123             (flags & TDFX_NEW_FOG) ? "fog, " : "",
1124             (flags & TDFX_NEW_STENCIL) ? "stencil, " : "",
1125             (flags & TDFX_NEW_STIPPLE) ? "stipple, " : "",
1126             (flags & TDFX_NEW_CLIP) ? "clip, " : "",
1127             (flags & TDFX_NEW_VIEWPORT) ? "viewport, " : "",
1128             (flags & TDFX_NEW_CULL) ? "cull, " : "",
1129             (flags & TDFX_NEW_GLIDE) ? "glide, " : "",
1130             (flags & TDFX_NEW_TEXTURE) ? "texture, " : "",
1131             (flags & TDFX_NEW_CONTEXT) ? "context, " : "");
1132 }
1133
1134
1135
1136 void tdfxDDUpdateHwState( GLcontext *ctx )
1137 {
1138    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
1139    int new_state = fxMesa->new_state;
1140
1141    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
1142       fprintf( stderr, "%s()\n", __FUNCTION__ );
1143    }
1144
1145    if ( new_state )
1146    {
1147       FLUSH_BATCH( fxMesa );
1148
1149       fxMesa->new_state = 0;
1150
1151       if ( 0 )
1152          tdfxDDPrintState( "tdfxUpdateHwState", new_state );
1153
1154       /* Update the various parts of the context's state.
1155        */
1156       if ( new_state & TDFX_NEW_ALPHA ) {
1157          tdfxUpdateAlphaMode( ctx );
1158       }
1159
1160       if ( new_state & TDFX_NEW_DEPTH )
1161          tdfxUpdateZMode( ctx );
1162
1163       if ( new_state & TDFX_NEW_FOG )
1164          tdfxUpdateFogAttrib( ctx );
1165
1166       if ( new_state & TDFX_NEW_CLIP )
1167          tdfxUpdateClipping( ctx );
1168
1169       if ( new_state & TDFX_NEW_STIPPLE )
1170          tdfxUpdateStipple( ctx );
1171
1172       if ( new_state & TDFX_NEW_CULL )
1173          tdfxUpdateCull( ctx );
1174
1175       if ( new_state & TDFX_NEW_LINE )
1176          tdfxUpdateLine( ctx );
1177
1178       if ( new_state & TDFX_NEW_VIEWPORT )
1179          tdfxUpdateViewport( ctx );
1180
1181       if ( new_state & TDFX_NEW_RENDER )
1182          tdfxUpdateRenderAttrib( ctx );
1183
1184       if ( new_state & TDFX_NEW_STENCIL )
1185          tdfxUpdateStencil( ctx );
1186
1187       if ( new_state & TDFX_NEW_TEXTURE ) {
1188          tdfxUpdateTextureState( ctx );
1189       }
1190       else if ( new_state & TDFX_NEW_TEXTURE_BIND ) {
1191          tdfxUpdateTextureBinding( ctx );
1192       }
1193    }
1194
1195    if ( 0 ) {
1196       FxI32 bias = (FxI32) (ctx->Polygon.OffsetUnits * TDFX_DEPTH_BIAS_SCALE);
1197
1198       if ( fxMesa->Depth.Bias != bias ) {
1199          fxMesa->Depth.Bias = bias;
1200          fxMesa->dirty |= TDFX_UPLOAD_DEPTH_BIAS;
1201       }
1202    }
1203
1204    if ( fxMesa->dirty ) {
1205       LOCK_HARDWARE( fxMesa );
1206       tdfxEmitHwStateLocked( fxMesa );
1207       UNLOCK_HARDWARE( fxMesa );
1208    }
1209 }
1210
1211
1212 static void tdfxDDInvalidateState( GLcontext *ctx, GLuint new_state )
1213 {
1214    _swrast_InvalidateState( ctx, new_state );
1215    _swsetup_InvalidateState( ctx, new_state );
1216    _ac_InvalidateState( ctx, new_state );
1217    _tnl_InvalidateState( ctx, new_state );
1218    TDFX_CONTEXT(ctx)->new_gl_state |= new_state;
1219 }
1220
1221
1222
1223 /* Initialize the context's Glide state mirror.  These values will be
1224  * used as Glide function call parameters when the time comes.
1225  */
1226 void tdfxInitState( tdfxContextPtr fxMesa )
1227 {
1228    GLcontext *ctx = fxMesa->glCtx;
1229    GLint i;
1230
1231    fxMesa->ColorCombine.Function        = GR_COMBINE_FUNCTION_LOCAL;
1232    fxMesa->ColorCombine.Factor          = GR_COMBINE_FACTOR_NONE;
1233    fxMesa->ColorCombine.Local           = GR_COMBINE_LOCAL_ITERATED;
1234    fxMesa->ColorCombine.Other           = GR_COMBINE_OTHER_NONE;
1235    fxMesa->ColorCombine.Invert          = FXFALSE;
1236    fxMesa->AlphaCombine.Function        = GR_COMBINE_FUNCTION_LOCAL;
1237    fxMesa->AlphaCombine.Factor          = GR_COMBINE_FACTOR_NONE;
1238    fxMesa->AlphaCombine.Local           = GR_COMBINE_LOCAL_ITERATED;
1239    fxMesa->AlphaCombine.Other           = GR_COMBINE_OTHER_NONE;
1240    fxMesa->AlphaCombine.Invert          = FXFALSE;
1241
1242    fxMesa->ColorCombineExt.SourceA      = GR_CMBX_ITRGB;
1243    fxMesa->ColorCombineExt.ModeA        = GR_FUNC_MODE_X;
1244    fxMesa->ColorCombineExt.SourceB      = GR_CMBX_ZERO;
1245    fxMesa->ColorCombineExt.ModeB        = GR_FUNC_MODE_ZERO;
1246    fxMesa->ColorCombineExt.SourceC      = GR_CMBX_ZERO;
1247    fxMesa->ColorCombineExt.InvertC      = FXTRUE;
1248    fxMesa->ColorCombineExt.SourceD      = GR_CMBX_ZERO;
1249    fxMesa->ColorCombineExt.InvertD      = FXFALSE;
1250    fxMesa->ColorCombineExt.Shift        = 0;
1251    fxMesa->ColorCombineExt.Invert       = FXFALSE;
1252    fxMesa->AlphaCombineExt.SourceA      = GR_CMBX_ITALPHA;
1253    fxMesa->AlphaCombineExt.ModeA        = GR_FUNC_MODE_X;
1254    fxMesa->AlphaCombineExt.SourceB      = GR_CMBX_ZERO;
1255    fxMesa->AlphaCombineExt.ModeB        = GR_FUNC_MODE_ZERO;
1256    fxMesa->AlphaCombineExt.SourceC      = GR_CMBX_ZERO;
1257    fxMesa->AlphaCombineExt.InvertC      = FXTRUE;
1258    fxMesa->AlphaCombineExt.SourceD      = GR_CMBX_ZERO;
1259    fxMesa->AlphaCombineExt.InvertD      = FXFALSE;
1260    fxMesa->AlphaCombineExt.Shift        = 0;
1261    fxMesa->AlphaCombineExt.Invert       = FXFALSE;
1262
1263    fxMesa->sScale0 = fxMesa->tScale0 = 1.0;
1264    fxMesa->sScale1 = fxMesa->tScale1 = 1.0;
1265
1266    fxMesa->TexPalette.Type = 0;
1267    fxMesa->TexPalette.Data = NULL;
1268
1269    for ( i = 0 ; i < TDFX_NUM_TMU ; i++ ) {
1270       fxMesa->TexSource[i].StartAddress = 0;
1271       fxMesa->TexSource[i].EvenOdd      = GR_MIPMAPLEVELMASK_EVEN;
1272       fxMesa->TexSource[i].Info         = NULL;
1273
1274       fxMesa->TexCombine[i].FunctionRGB         = 0;
1275       fxMesa->TexCombine[i].FactorRGB           = 0;
1276       fxMesa->TexCombine[i].FunctionAlpha       = 0;
1277       fxMesa->TexCombine[i].FactorAlpha         = 0;
1278       fxMesa->TexCombine[i].InvertRGB           = FXFALSE;
1279       fxMesa->TexCombine[i].InvertAlpha         = FXFALSE;
1280
1281       fxMesa->TexCombineExt[i].Alpha.SourceA    = 0;
1282       /* XXX more state to init here */
1283       fxMesa->TexCombineExt[i].Color.SourceA    = 0;
1284       fxMesa->TexCombineExt[i].EnvColor        = 0x0;
1285
1286       fxMesa->TexParams[i].sClamp       = GR_TEXTURECLAMP_WRAP;
1287       fxMesa->TexParams[i].tClamp       = GR_TEXTURECLAMP_WRAP;
1288       fxMesa->TexParams[i].minFilt      = GR_TEXTUREFILTER_POINT_SAMPLED;
1289       fxMesa->TexParams[i].magFilt      = GR_TEXTUREFILTER_BILINEAR;
1290       fxMesa->TexParams[i].mmMode       = GR_MIPMAP_DISABLE;
1291       fxMesa->TexParams[i].LODblend     = FXFALSE;
1292       fxMesa->TexParams[i].LodBias      = 0.0;
1293
1294       fxMesa->TexState.EnvMode[i]       = ~0;
1295       fxMesa->TexState.TexFormat[i]     = ~0;
1296       fxMesa->TexState.Enabled[i]       = 0;
1297    }
1298
1299    if ( ctx->Visual.doubleBufferMode) {
1300       fxMesa->DrawBuffer                = GR_BUFFER_BACKBUFFER;
1301       fxMesa->ReadBuffer                = GR_BUFFER_BACKBUFFER;
1302    } else {
1303       fxMesa->DrawBuffer                = GR_BUFFER_FRONTBUFFER;
1304       fxMesa->ReadBuffer                = GR_BUFFER_FRONTBUFFER;
1305    }
1306
1307    fxMesa->Color.ClearColor             = 0x00000000;
1308    fxMesa->Color.ClearAlpha             = 0x00;
1309    fxMesa->Color.ColorMask[RCOMP]       = FXTRUE;
1310    fxMesa->Color.ColorMask[BCOMP]       = FXTRUE;
1311    fxMesa->Color.ColorMask[GCOMP]       = FXTRUE;
1312    fxMesa->Color.ColorMask[ACOMP]       = FXTRUE;
1313    fxMesa->Color.MonoColor              = 0xffffffff;
1314
1315    fxMesa->Color.AlphaFunc              = GR_CMP_ALWAYS;
1316    fxMesa->Color.AlphaRef               = 0x00;
1317    fxMesa->Color.BlendSrcRGB            = GR_BLEND_ONE;
1318    fxMesa->Color.BlendDstRGB            = GR_BLEND_ZERO;
1319    fxMesa->Color.BlendSrcA              = GR_BLEND_ONE;
1320    fxMesa->Color.BlendSrcA              = GR_BLEND_ZERO;
1321
1322    fxMesa->Color.Dither                 = GR_DITHER_2x2;
1323
1324    if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
1325       fxMesa->Depth.Mode                = GR_DEPTHBUFFER_ZBUFFER;
1326    } else {
1327       fxMesa->Depth.Mode                = GR_DEPTHBUFFER_DISABLE;
1328    }
1329    fxMesa->Depth.Bias                   = 0;
1330    fxMesa->Depth.Func                   = GR_CMP_LESS;
1331    fxMesa->Depth.Clear                  = 0; /* computed later */
1332    fxMesa->Depth.Mask                   = FXTRUE;
1333
1334
1335    fxMesa->Fog.Mode                     = GR_FOG_DISABLE;
1336    fxMesa->Fog.Color                    = 0x00000000;
1337    fxMesa->Fog.Table                    = NULL;
1338    fxMesa->Fog.Density                  = 1.0;
1339    fxMesa->Fog.Near                     = 1.0;
1340    fxMesa->Fog.Far                      = 1.0;
1341
1342    fxMesa->Stencil.Function             = GR_CMP_ALWAYS;
1343    fxMesa->Stencil.RefValue             = 0;
1344    fxMesa->Stencil.ValueMask            = 0xff;
1345    fxMesa->Stencil.WriteMask            = 0xff;
1346    fxMesa->Stencil.FailFunc             = 0;
1347    fxMesa->Stencil.ZFailFunc            = 0;
1348    fxMesa->Stencil.ZPassFunc            = 0;
1349    fxMesa->Stencil.Clear                = 0;
1350
1351    fxMesa->Stipple.Mode                 = GR_STIPPLE_DISABLE;
1352    fxMesa->Stipple.Pattern              = 0xffffffff;
1353
1354    fxMesa->Scissor.minX                 = 0;
1355    fxMesa->Scissor.minY                 = 0;
1356    fxMesa->Scissor.maxX                 = 0;
1357    fxMesa->Scissor.maxY                 = 0;
1358
1359    fxMesa->Viewport.Mode                = GR_WINDOW_COORDS;
1360    fxMesa->Viewport.X                   = 0;
1361    fxMesa->Viewport.Y                   = 0;
1362    fxMesa->Viewport.Width               = 0;
1363    fxMesa->Viewport.Height              = 0;
1364    fxMesa->Viewport.Near                = 0.0;
1365    fxMesa->Viewport.Far                 = 0.0;
1366
1367    fxMesa->CullMode                     = GR_CULL_DISABLE;
1368
1369    fxMesa->Glide.ColorFormat            = GR_COLORFORMAT_ABGR;
1370    fxMesa->Glide.Origin                 = GR_ORIGIN_LOWER_LEFT;
1371    fxMesa->Glide.Initialized            = FXFALSE;
1372 }
1373
1374
1375
1376 void tdfxDDInitStateFuncs( GLcontext *ctx )
1377 {
1378    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
1379
1380    ctx->Driver.UpdateState              = tdfxDDInvalidateState;
1381
1382
1383    /* State notification callbacks:
1384     */
1385    ctx->Driver.ClearColor               = tdfxDDClearColor;
1386    ctx->Driver.DrawBuffer               = tdfxDDDrawBuffer;
1387    ctx->Driver.ReadBuffer               = tdfxDDReadBuffer;
1388
1389    ctx->Driver.ColorMask                = tdfxDDColorMask;
1390
1391    ctx->Driver.AlphaFunc                = tdfxDDAlphaFunc;
1392    ctx->Driver.BlendEquationSeparate    = tdfxDDBlendEquationSeparate;
1393    ctx->Driver.BlendFuncSeparate        = tdfxDDBlendFuncSeparate;
1394    ctx->Driver.ClearDepth               = tdfxDDClearDepth;
1395    ctx->Driver.CullFace                 = tdfxDDCullFace;
1396    ctx->Driver.FrontFace                = tdfxDDFrontFace;
1397    ctx->Driver.DepthFunc                = tdfxDDDepthFunc;
1398    ctx->Driver.DepthMask                = tdfxDDDepthMask;
1399    ctx->Driver.DepthRange               = tdfxDDDepthRange;
1400    ctx->Driver.Enable                   = tdfxDDEnable;
1401    ctx->Driver.Fogfv                    = tdfxDDFogfv;
1402    ctx->Driver.LightModelfv             = tdfxDDLightModelfv;
1403    ctx->Driver.LineWidth                = tdfxDDLineWidth;
1404    ctx->Driver.PolygonStipple           = tdfxDDPolygonStipple;
1405    ctx->Driver.RenderMode               = tdfxDDRenderMode;
1406    ctx->Driver.Scissor                  = tdfxDDScissor;
1407    ctx->Driver.ShadeModel               = tdfxDDShadeModel;
1408
1409    if ( fxMesa->haveHwStencil ) {
1410       ctx->Driver.StencilFunc           = tdfxDDStencilFunc;
1411       ctx->Driver.StencilMask           = tdfxDDStencilMask;
1412       ctx->Driver.StencilOp             = tdfxDDStencilOp;
1413    }
1414
1415    ctx->Driver.Viewport                 = tdfxDDViewport;
1416
1417    /* Swrast hooks for imaging extensions:
1418     */
1419    ctx->Driver.CopyColorTable = _swrast_CopyColorTable;
1420    ctx->Driver.CopyColorSubTable = _swrast_CopyColorSubTable;
1421    ctx->Driver.CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
1422    ctx->Driver.CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
1423 }