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 tdfxDDBlendEquation( GLcontext *ctx, GLenum mode )
 271 {
 272    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 273
 274    FLUSH_BATCH( fxMesa );
 275    fxMesa->new_state |= TDFX_NEW_ALPHA;
 276 }
 277
 278 static void tdfxDDBlendFuncSeparate( GLcontext *ctx,
 279                                      GLenum sfactorRGB, GLenum dfactorRGB,
 280                                      GLenum sfactorA, GLenum dfactorA )
 281 {
 282    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 283
 284    FLUSH_BATCH( fxMesa );
 285    fxMesa->new_state |= TDFX_NEW_ALPHA;
 286
 287    /*
 288     * XXX - Voodoo5 seems to suffer from precision problems in some
 289     * blend modes.  To pass all the conformance tests we'd have to
 290     * fall back to software for many modes.  Revisit someday.
 291     */
 292 }
 293
 294 /* =============================================================
 295  * Stipple
 296  */
 297
 298 void tdfxUpdateStipple( GLcontext *ctx )
 299 {
 300    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 301    GrStippleMode_t mode = GR_STIPPLE_DISABLE;
 302
 303    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
 304       fprintf( stderr, "%s()\n", __FUNCTION__ );
 305    }
 306
 307    FLUSH_BATCH( fxMesa );
 308
 309    if (ctx->Polygon.StippleFlag) {
 310       mode = GR_STIPPLE_PATTERN;
 311    }
 312
 313    if ( fxMesa->Stipple.Mode != mode ) {
 314       fxMesa->Stipple.Mode = mode;
 315       fxMesa->dirty |= TDFX_UPLOAD_STIPPLE;
 316    }
 317 }
 318
 319
 320 /* =============================================================
 321  * Depth testing
 322  */
 323
 324 static void tdfxUpdateZMode( GLcontext *ctx )
 325 {
 326    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 327    GrCmpFnc_t func;
 328    FxI32 bias;
 329    FxBool mask;
 330
 331    if ( TDFX_DEBUG & DEBUG_VERBOSE_API )
 332       fprintf( stderr, "%s()\n", __FUNCTION__ );
 333
 334
 335    bias = (FxI32) (ctx->Polygon.OffsetUnits * TDFX_DEPTH_BIAS_SCALE);
 336
 337    if ( ctx->Depth.Test ) {
 338       switch ( ctx->Depth.Func ) {
 339       case GL_NEVER:
 340          func = GR_CMP_NEVER;
 341          break;
 342       case GL_LESS:
 343          func = GR_CMP_LESS;
 344          break;
 345       case GL_LEQUAL:
 346          func = GR_CMP_LEQUAL;
 347          break;
 348       case GL_EQUAL:
 349          func = GR_CMP_EQUAL;
 350          break;
 351       case GL_GEQUAL:
 352          func = GR_CMP_GEQUAL;
 353          break;
 354       case GL_GREATER:
 355          func = GR_CMP_GREATER;
 356          break;
 357       case GL_NOTEQUAL:
 358          func = GR_CMP_NOTEQUAL;
 359          break;
 360       case GL_ALWAYS:
 361       default:
 362          func = GR_CMP_ALWAYS;
 363          break;
 364       }
 365
 366       if ( ctx->Depth.Mask ) {
 367          mask = FXTRUE;
 368       }
 369       else {
 370          mask = FXFALSE;
 371       }
 372    }
 373    else {
 374       /* depth testing disabled */
 375       func = GR_CMP_ALWAYS;  /* fragments always pass */
 376       mask = FXFALSE;        /* zbuffer is not touched */
 377    }
 378
 379    fxMesa->Depth.Clear = (FxU32) (((1 << fxMesa->glCtx->Visual.depthBits) - 1)
 380                                   * ctx->Depth.Clear);
 381
 382    if ( fxMesa->Depth.Bias != bias ) {
 383       fxMesa->Depth.Bias = bias;
 384       fxMesa->dirty |= TDFX_UPLOAD_DEPTH_BIAS;
 385    }
 386    if ( fxMesa->Depth.Func != func ) {
 387       fxMesa->Depth.Func = func;
 388       fxMesa->dirty |= TDFX_UPLOAD_DEPTH_FUNC | TDFX_UPLOAD_DEPTH_MASK;
 389    }
 390    if ( fxMesa->Depth.Mask != mask ) {
 391       fxMesa->Depth.Mask = mask;
 392       fxMesa->dirty |= TDFX_UPLOAD_DEPTH_MASK;
 393    }
 394 }
 395
 396 static void tdfxDDDepthFunc( GLcontext *ctx, GLenum func )
 397 {
 398    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 399
 400    FLUSH_BATCH( fxMesa );
 401    fxMesa->new_state |= TDFX_NEW_DEPTH;
 402 }
 403
 404 static void tdfxDDDepthMask( GLcontext *ctx, GLboolean flag )
 405 {
 406    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 407
 408    FLUSH_BATCH( fxMesa );
 409    fxMesa->new_state |= TDFX_NEW_DEPTH;
 410 }
 411
 412 static void tdfxDDClearDepth( GLcontext *ctx, GLclampd d )
 413 {
 414    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 415
 416    FLUSH_BATCH( fxMesa );
 417    fxMesa->new_state |= TDFX_NEW_DEPTH;
 418 }
 419
 420
 421
 422 /* =============================================================
 423  * Stencil
 424  */
 425
 426
 427 /* Evaluate all stencil state and make the Glide calls.
 428  */
 429 static GrStencil_t convertGLStencilOp( GLenum op )
 430 {
 431    switch ( op ) {
 432    case GL_KEEP:
 433       return GR_STENCILOP_KEEP;
 434    case GL_ZERO:
 435       return GR_STENCILOP_ZERO;
 436    case GL_REPLACE:
 437       return GR_STENCILOP_REPLACE;
 438    case GL_INCR:
 439       return GR_STENCILOP_INCR_CLAMP;
 440    case GL_DECR:
 441       return GR_STENCILOP_DECR_CLAMP;
 442    case GL_INVERT:
 443       return GR_STENCILOP_INVERT;
 444    case GL_INCR_WRAP_EXT:
 445       return GR_STENCILOP_INCR_WRAP;
 446    case GL_DECR_WRAP_EXT:
 447       return GR_STENCILOP_DECR_WRAP;
 448    default:
 449       _mesa_problem( NULL, "bad stencil op in convertGLStencilOp" );
 450    }
 451    return GR_STENCILOP_KEEP;   /* never get, silence compiler warning */
 452 }
 453
 454
 455 static void tdfxUpdateStencil( GLcontext *ctx )
 456 {
 457    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 458
 459    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
 460       fprintf( stderr, "%s()\n", __FUNCTION__ );
 461    }
 462
 463    if (fxMesa->haveHwStencil) {
 464       if (ctx->Stencil.Enabled) {
 465          fxMesa->Stencil.Function = ctx->Stencil.Function[0] - GL_NEVER;
 466          fxMesa->Stencil.RefValue = ctx->Stencil.Ref[0];
 467          fxMesa->Stencil.ValueMask = ctx->Stencil.ValueMask[0];
 468          fxMesa->Stencil.WriteMask = ctx->Stencil.WriteMask[0];
 469          fxMesa->Stencil.FailFunc = convertGLStencilOp(ctx->Stencil.FailFunc[0]);
 470          fxMesa->Stencil.ZFailFunc = convertGLStencilOp(ctx->Stencil.ZFailFunc[0]);
 471          fxMesa->Stencil.ZPassFunc = convertGLStencilOp(ctx->Stencil.ZPassFunc[0]);
 472          fxMesa->Stencil.Clear = ctx->Stencil.Clear & 0xff;
 473       }
 474       fxMesa->dirty |= TDFX_UPLOAD_STENCIL;
 475    }
 476 }
 477
 478
 479 static void tdfxDDStencilFunc( GLcontext *ctx, GLenum func,
 480                                GLint ref, GLuint mask )
 481 {
 482    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 483
 484    FLUSH_BATCH( fxMesa );
 485    fxMesa->new_state |= TDFX_NEW_STENCIL;
 486 }
 487
 488 static void tdfxDDStencilMask( GLcontext *ctx, GLuint mask )
 489 {
 490    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 491
 492    FLUSH_BATCH( fxMesa );
 493    fxMesa->new_state |= TDFX_NEW_STENCIL;
 494 }
 495
 496 static void tdfxDDStencilOp( GLcontext *ctx, GLenum sfail,
 497                              GLenum zfail, GLenum zpass )
 498 {
 499    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 500
 501    FLUSH_BATCH( fxMesa );
 502    fxMesa->new_state |= TDFX_NEW_STENCIL;
 503 }
 504
 505
 506 /* =============================================================
 507  * Fog - orthographic fog still not working
 508  */
 509
 510 static void tdfxUpdateFogAttrib( GLcontext *ctx )
 511 {
 512    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 513    GrFogMode_t mode;
 514    GrColor_t color;
 515
 516    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
 517       fprintf( stderr, "%s()\n", __FUNCTION__ );
 518    }
 519
 520    if ( ctx->Fog.Enabled ) {
 521       mode = GR_FOG_WITH_TABLE_ON_Q;
 522    } else {
 523       mode = GR_FOG_DISABLE;
 524    }
 525
 526    color = TDFXPACKCOLOR888((GLubyte)(ctx->Fog.Color[0]*255.0F),
 527                             (GLubyte)(ctx->Fog.Color[1]*255.0F),
 528                             (GLubyte)(ctx->Fog.Color[2]*255.0F));
 529
 530    if ( fxMesa->Fog.Mode != mode ) {
 531       fxMesa->Fog.Mode = mode;
 532       fxMesa->dirty |= TDFX_UPLOAD_FOG_MODE;
 533    }
 534    if ( fxMesa->Fog.Color != color ) {
 535       fxMesa->Fog.Color = color;
 536       fxMesa->dirty |= TDFX_UPLOAD_FOG_COLOR;
 537    }
 538    if ( fxMesa->Fog.TableMode != ctx->Fog.Mode ||
 539         fxMesa->Fog.Density != ctx->Fog.Density ||
 540         fxMesa->Fog.Near != ctx->Fog.Start ||
 541         fxMesa->Fog.Far != ctx->Fog.End )
 542    {
 543       switch( ctx->Fog.Mode ) {
 544       case GL_EXP:
 545          fxMesa->Glide.guFogGenerateExp( fxMesa->Fog.Table, ctx->Fog.Density );
 546          break;
 547       case GL_EXP2:
 548          fxMesa->Glide.guFogGenerateExp2( fxMesa->Fog.Table, ctx->Fog.Density);
 549          break;
 550       case GL_LINEAR:
 551          fxMesa->Glide.guFogGenerateLinear( fxMesa->Fog.Table,
 552                                             ctx->Fog.Start, ctx->Fog.End );
 553          break;
 554       }
 555
 556       fxMesa->Fog.TableMode = ctx->Fog.Mode;
 557       fxMesa->Fog.Density = ctx->Fog.Density;
 558       fxMesa->Fog.Near = ctx->Fog.Start;
 559       fxMesa->Fog.Far = ctx->Fog.End;
 560       fxMesa->dirty |= TDFX_UPLOAD_FOG_TABLE;
 561    }
 562 }
 563
 564 static void tdfxDDFogfv( GLcontext *ctx, GLenum pname, const GLfloat *param )
 565 {
 566    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 567
 568    FLUSH_BATCH( fxMesa );
 569    fxMesa->new_state |= TDFX_NEW_FOG;
 570 }
 571
 572
 573 /* =============================================================
 574  * Clipping
 575  */
 576
 577 static int intersect_rect( XF86DRIClipRectPtr out,
 578                            const XF86DRIClipRectPtr a,
 579                            const XF86DRIClipRectPtr b)
 580 {
 581    *out = *a;
 582    if (b->x1 > out->x1) out->x1 = b->x1;
 583    if (b->y1 > out->y1) out->y1 = b->y1;
 584    if (b->x2 < out->x2) out->x2 = b->x2;
 585    if (b->y2 < out->y2) out->y2 = b->y2;
 586    if (out->x1 >= out->x2) return 0;
 587    if (out->y1 >= out->y2) return 0;
 588    return 1;
 589 }
 590
 591
 592 /*
 593  * Examine XF86 cliprect list and scissor state to recompute our
 594  * cliprect list.
 595  */
 596 void tdfxUpdateClipping( GLcontext *ctx )
 597 {
 598    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 599    __DRIdrawablePrivate *dPriv = fxMesa->driDrawable;
 600
 601    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
 602       fprintf( stderr, "%s()\n", __FUNCTION__ );
 603    }
 604
 605    assert(ctx);
 606    assert(fxMesa);
 607    assert(dPriv);
 608
 609    if ( dPriv->x != fxMesa->x_offset || dPriv->y != fxMesa->y_offset ||
 610         dPriv->w != fxMesa->width || dPriv->h != fxMesa->height ) {
 611       fxMesa->x_offset = dPriv->x;
 612       fxMesa->y_offset = dPriv->y;
 613       fxMesa->width = dPriv->w;
 614       fxMesa->height = dPriv->h;
 615       fxMesa->y_delta =
 616          fxMesa->screen_height - fxMesa->y_offset - fxMesa->height;
 617       tdfxUpdateViewport( ctx );
 618    }
 619
 620    if (fxMesa->scissoredClipRects && fxMesa->pClipRects) {
 621       free(fxMesa->pClipRects);
 622    }
 623
 624    if (ctx->Scissor.Enabled) {
 625       /* intersect OpenGL scissor box with all cliprects to make a new
 626        * list of cliprects.
 627        */
 628       XF86DRIClipRectRec scissor;
 629       int x1 = ctx->Scissor.X + fxMesa->x_offset;
 630       int y1 = fxMesa->screen_height - fxMesa->y_delta
 631              - ctx->Scissor.Y - ctx->Scissor.Height;
 632       int x2 = x1 + ctx->Scissor.Width;
 633       int y2 = y1 + ctx->Scissor.Height;
 634       scissor.x1 = MAX2(x1, 0);
 635       scissor.y1 = MAX2(y1, 0);
 636       scissor.x2 = MAX2(x2, 0);
 637       scissor.y2 = MAX2(y2, 0);
 638
 639       assert(scissor.x2 >= scissor.x1);
 640       assert(scissor.y2 >= scissor.y1);
 641
 642       fxMesa->pClipRects = malloc(dPriv->numClipRects
 643                                   * sizeof(XF86DRIClipRectRec));
 644       if (fxMesa->pClipRects) {
 645          int i;
 646          fxMesa->numClipRects = 0;
 647          for (i = 0; i < dPriv->numClipRects; i++) {
 648             if (intersect_rect(&fxMesa->pClipRects[fxMesa->numClipRects],
 649                                &scissor, &dPriv->pClipRects[i])) {
 650                fxMesa->numClipRects++;
 651             }
 652          }
 653          fxMesa->scissoredClipRects = GL_TRUE;
 654       }
 655       else {
 656          /* out of memory, forgo scissor */
 657          fxMesa->numClipRects = dPriv->numClipRects;
 658          fxMesa->pClipRects = dPriv->pClipRects;
 659          fxMesa->scissoredClipRects = GL_FALSE;
 660       }
 661    }
 662    else {
 663       fxMesa->numClipRects = dPriv->numClipRects;
 664       fxMesa->pClipRects = dPriv->pClipRects;
 665       fxMesa->scissoredClipRects = GL_FALSE;
 666    }
 667
 668    fxMesa->dirty |= TDFX_UPLOAD_CLIP;
 669 }
 670
 671
 672
 673 /* =============================================================
 674  * Culling
 675  */
 676
 677 void tdfxUpdateCull( GLcontext *ctx )
 678 {
 679    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 680    GrCullMode_t mode = GR_CULL_DISABLE;
 681
 682    /* KW: don't need to check raster_primitive here as we don't
 683     * attempt to draw lines or points with triangles.
 684     */
 685    if ( ctx->Polygon.CullFlag ) {
 686       switch ( ctx->Polygon.CullFaceMode ) {
 687       case GL_FRONT:
 688          if ( ctx->Polygon.FrontFace == GL_CCW ) {
 689             mode = GR_CULL_POSITIVE;
 690          } else {
 691             mode = GR_CULL_NEGATIVE;
 692          }
 693          break;
 694
 695       case GL_BACK:
 696          if ( ctx->Polygon.FrontFace == GL_CCW ) {
 697             mode = GR_CULL_NEGATIVE;
 698          } else {
 699             mode = GR_CULL_POSITIVE;
 700          }
 701          break;
 702
 703       case GL_FRONT_AND_BACK:
 704          /* Handled as a fallback on triangles in tdfx_tris.c */
 705          return;
 706
 707       default:
 708          ASSERT(0);
 709          break;
 710       }
 711    }
 712
 713    if ( fxMesa->CullMode != mode ) {
 714       fxMesa->CullMode = mode;
 715       fxMesa->dirty |= TDFX_UPLOAD_CULL;
 716    }
 717 }
 718
 719 static void tdfxDDCullFace( GLcontext *ctx, GLenum mode )
 720 {
 721    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 722
 723    FLUSH_BATCH( fxMesa );
 724    fxMesa->new_state |= TDFX_NEW_CULL;
 725 }
 726
 727 static void tdfxDDFrontFace( GLcontext *ctx, GLenum mode )
 728 {
 729    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 730
 731    FLUSH_BATCH( fxMesa );
 732    fxMesa->new_state |= TDFX_NEW_CULL;
 733 }
 734
 735
 736 /* =============================================================
 737  * Line drawing.
 738  */
 739
 740 static void tdfxUpdateLine( GLcontext *ctx )
 741 {
 742    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 743
 744    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
 745       fprintf( stderr, "%s()\n", __FUNCTION__ );
 746    }
 747
 748    FLUSH_BATCH( fxMesa );
 749    fxMesa->dirty |= TDFX_UPLOAD_LINE;
 750 }
 751
 752
 753 static void tdfxDDLineWidth( GLcontext *ctx, GLfloat width )
 754 {
 755    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 756    FLUSH_BATCH( fxMesa );
 757    fxMesa->new_state |= TDFX_NEW_LINE;
 758 }
 759
 760
 761 /* =============================================================
 762  * Color Attributes
 763  */
 764
 765 static void tdfxDDColorMask( GLcontext *ctx,
 766                              GLboolean r, GLboolean g,
 767                              GLboolean b, GLboolean a )
 768 {
 769    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 770
 771    FLUSH_BATCH( fxMesa );
 772
 773    if ( fxMesa->Color.ColorMask[RCOMP] != r ||
 774         fxMesa->Color.ColorMask[GCOMP] != g ||
 775         fxMesa->Color.ColorMask[BCOMP] != b ||
 776         fxMesa->Color.ColorMask[ACOMP] != a ) {
 777       fxMesa->Color.ColorMask[RCOMP] = r;
 778       fxMesa->Color.ColorMask[GCOMP] = g;
 779       fxMesa->Color.ColorMask[BCOMP] = b;
 780       fxMesa->Color.ColorMask[ACOMP] = a;
 781       fxMesa->dirty |= TDFX_UPLOAD_COLOR_MASK;
 782
 783       if (ctx->Visual.redBits < 8) {
 784          /* Can't do RGB colormasking in 16bpp mode. */
 785          /* We can completely ignore the alpha mask. */
 786          FALLBACK( fxMesa, TDFX_FALLBACK_COLORMASK, (r != g || g != b) );
 787       }
 788    }
 789 }
 790
 791
 792 static void tdfxDDClearColor( GLcontext *ctx,
 793                               const GLfloat color[4] )
 794 {
 795    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 796    GLubyte c[4];
 797    FLUSH_BATCH( fxMesa );
 798    CLAMPED_FLOAT_TO_UBYTE(c[0], color[0]);
 799    CLAMPED_FLOAT_TO_UBYTE(c[1], color[1]);
 800    CLAMPED_FLOAT_TO_UBYTE(c[2], color[2]);
 801    CLAMPED_FLOAT_TO_UBYTE(c[3], color[3]);
 802    fxMesa->Color.ClearColor = TDFXPACKCOLOR888( c[0], c[1], c[2] );
 803    fxMesa->Color.ClearAlpha = c[3];
 804 }
 805
 806
 807 /* =============================================================
 808  * Light Model
 809  */
 810
 811 static void tdfxDDLightModelfv( GLcontext *ctx, GLenum pname,
 812                                 const GLfloat *param )
 813 {
 814    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 815
 816    if ( pname == GL_LIGHT_MODEL_COLOR_CONTROL ) {
 817       FALLBACK( fxMesa, TDFX_FALLBACK_SPECULAR,
 818                 (ctx->Light.Enabled &&
 819                  ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR ));
 820    }
 821 }
 822
 823 static void tdfxDDShadeModel( GLcontext *ctx, GLenum mode )
 824 {
 825    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 826
 827    /* FIXME: Can we implement native flat shading? */
 828    FLUSH_BATCH( fxMesa );
 829    fxMesa->new_state |= TDFX_NEW_TEXTURE;
 830 }
 831
 832
 833 /* =============================================================
 834  * Scissor
 835  */
 836
 837 static void
 838 tdfxDDScissor(GLcontext * ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 839 {
 840    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 841    FLUSH_BATCH( fxMesa );
 842    fxMesa->new_state |= TDFX_NEW_CLIP;
 843 }
 844
 845 /* =============================================================
 846  * Render
 847  */
 848
 849 static void tdfxUpdateRenderAttrib( GLcontext *ctx )
 850 {
 851    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 852    FLUSH_BATCH( fxMesa );
 853    fxMesa->dirty |= TDFX_UPLOAD_RENDER_BUFFER;
 854 }
 855
 856 /* =============================================================
 857  * Viewport
 858  */
 859
 860 void tdfxUpdateViewport( GLcontext *ctx )
 861 {
 862    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 863    const GLfloat *v = ctx->Viewport._WindowMap.m;
 864    GLfloat *m = fxMesa->hw_viewport;
 865
 866    m[MAT_SX] = v[MAT_SX];
 867    m[MAT_TX] = v[MAT_TX] + fxMesa->x_offset + TRI_X_OFFSET;
 868    m[MAT_SY] = v[MAT_SY];
 869    m[MAT_TY] = v[MAT_TY] + fxMesa->y_delta + TRI_Y_OFFSET;
 870    m[MAT_SZ] = v[MAT_SZ];
 871    m[MAT_TZ] = v[MAT_TZ];
 872
 873    fxMesa->SetupNewInputs |= VERT_BIT_POS;
 874 }
 875
 876
 877 static void tdfxDDViewport( GLcontext *ctx, GLint x, GLint y,
 878                             GLsizei w, GLsizei h )
 879 {
 880    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 881    FLUSH_BATCH( fxMesa );
 882    fxMesa->new_state |= TDFX_NEW_VIEWPORT;
 883 }
 884
 885
 886 static void tdfxDDDepthRange( GLcontext *ctx, GLclampd nearVal, GLclampd farVal )
 887 {
 888    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
 889    FLUSH_BATCH( fxMesa );
 890    fxMesa->new_state |= TDFX_NEW_VIEWPORT;
 891 }
 892
 893
 894 /* =============================================================
 895  * State enable/disable
 896  */
 897
 898 static void tdfxDDEnable( GLcontext *ctx, GLenum cap, GLboolean state )
 899 {
 900    tdfxContextPtr fxMesa = TDFX_CONTEXT( ctx );
 901
 902    switch ( cap ) {
 903    case GL_ALPHA_TEST:
 904       FLUSH_BATCH( fxMesa );
 905       fxMesa->new_state |= TDFX_NEW_ALPHA;
 906       break;
 907
 908    case GL_BLEND:
 909       FLUSH_BATCH( fxMesa );
 910       fxMesa->new_state |= TDFX_NEW_ALPHA;
 911       FALLBACK( fxMesa, TDFX_FALLBACK_LOGICOP,
 912                 (ctx->Color.ColorLogicOpEnabled &&
 913                  ctx->Color.LogicOp != GL_COPY));
 914       break;
 915
 916    case GL_CULL_FACE:
 917       FLUSH_BATCH( fxMesa );
 918       fxMesa->new_state |= TDFX_NEW_CULL;
 919       break;
 920
 921    case GL_DEPTH_TEST:
 922       FLUSH_BATCH( fxMesa );
 923       fxMesa->new_state |= TDFX_NEW_DEPTH;
 924       break;
 925
 926    case GL_DITHER:
 927       FLUSH_BATCH( fxMesa );
 928       if ( state ) {
 929          fxMesa->Color.Dither = GR_DITHER_2x2;
 930       } else {
 931          fxMesa->Color.Dither = GR_DITHER_DISABLE;
 932       }
 933       fxMesa->dirty |= TDFX_UPLOAD_DITHER;
 934       break;
 935
 936    case GL_FOG:
 937       FLUSH_BATCH( fxMesa );
 938       fxMesa->new_state |= TDFX_NEW_FOG;
 939       break;
 940
 941    case GL_COLOR_LOGIC_OP:
 942       FALLBACK( fxMesa, TDFX_FALLBACK_LOGICOP,
 943                 (ctx->Color.ColorLogicOpEnabled &&
 944                  ctx->Color.LogicOp != GL_COPY));
 945       break;
 946
 947    case GL_LIGHTING:
 948       FALLBACK( fxMesa, TDFX_FALLBACK_SPECULAR,
 949                 (ctx->Light.Enabled &&
 950                  ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR ));
 951       break;
 952
 953    case GL_LINE_SMOOTH:
 954       FLUSH_BATCH( fxMesa );
 955       fxMesa->new_state |= TDFX_NEW_LINE;
 956       break;
 957
 958    case GL_LINE_STIPPLE:
 959       FALLBACK(fxMesa, TDFX_FALLBACK_LINE_STIPPLE, state);
 960       break;
 961
 962    case GL_POLYGON_STIPPLE:
 963       FLUSH_BATCH(fxMesa);
 964       fxMesa->new_state |= TDFX_NEW_STIPPLE;
 965       break;
 966
 967    case GL_SCISSOR_TEST:
 968       FLUSH_BATCH( fxMesa );
 969       fxMesa->new_state |= TDFX_NEW_CLIP;
 970       break;
 971
 972    case GL_STENCIL_TEST:
 973       FLUSH_BATCH( fxMesa );
 974       FALLBACK( fxMesa, TDFX_FALLBACK_STENCIL, state && !fxMesa->haveHwStencil);
 975       break;
 976
 977    case GL_TEXTURE_1D:
 978    case GL_TEXTURE_3D:
 979       FLUSH_BATCH( fxMesa );
 980       FALLBACK( fxMesa, TDFX_FALLBACK_TEXTURE_1D_3D, state); /* wrong */
 981       fxMesa->new_state |= TDFX_NEW_TEXTURE;
 982       break;
 983
 984    case GL_TEXTURE_2D:
 985       FLUSH_BATCH( fxMesa );
 986       fxMesa->new_state |= TDFX_NEW_TEXTURE;
 987       break;
 988
 989    default:
 990       return;
 991    }
 992 }
 993
 994
 995
 996 /* Set the buffer used for drawing */
 997 /* XXX support for separate read/draw buffers hasn't been tested */
 998 static void tdfxDDDrawBuffer( GLcontext *ctx, GLenum mode )
 999 {
1000    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
1001
1002    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
1003       fprintf( stderr, "%s()\n", __FUNCTION__ );
1004    }
1005
1006    FLUSH_BATCH( fxMesa );
1007
1008    /*
1009     * _DrawDestMask is easier to cope with than <mode>.
1010     */
1011    switch ( ctx->Color._DrawDestMask ) {
1012    case FRONT_LEFT_BIT:
1013       fxMesa->DrawBuffer = fxMesa->ReadBuffer = GR_BUFFER_FRONTBUFFER;
1014       fxMesa->new_state |= TDFX_NEW_RENDER;
1015       FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_FALSE );
1016       break;
1017    case BACK_LEFT_BIT:
1018       fxMesa->DrawBuffer = fxMesa->ReadBuffer = GR_BUFFER_BACKBUFFER;
1019       fxMesa->new_state |= TDFX_NEW_RENDER;
1020       FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_FALSE );
1021       break;
1022    case 0:
1023       FX_grColorMaskv( ctx, false4 );
1024       FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_FALSE );
1025       break;
1026    default:
1027       FALLBACK( fxMesa, TDFX_FALLBACK_DRAW_BUFFER, GL_TRUE );
1028       break;
1029    }
1030
1031    /* We want to update the s/w rast state too so that tdfxDDSetBuffer()
1032     * gets called.
1033     */
1034    _swrast_DrawBuffer(ctx, mode);
1035 }
1036
1037
1038 static void tdfxDDReadBuffer( GLcontext *ctx, GLenum mode )
1039 {
1040    /* XXX ??? */
1041 }
1042
1043
1044 /* =============================================================
1045  * Polygon stipple
1046  */
1047
1048 static void tdfxDDPolygonStipple( GLcontext *ctx, const GLubyte *mask )
1049 {
1050    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
1051    const GLubyte *m = mask;
1052    GLubyte q[4];
1053    int i,j,k;
1054    GLboolean allBitsSet;
1055
1056 /*     int active = (ctx->Polygon.StippleFlag &&  */
1057 /*               fxMesa->reduced_prim == GL_TRIANGLES); */
1058
1059    FLUSH_BATCH(fxMesa);
1060    fxMesa->Stipple.Pattern = 0xffffffff;
1061    fxMesa->dirty |= TDFX_UPLOAD_STIPPLE;
1062    fxMesa->new_state |= TDFX_NEW_STIPPLE;
1063
1064    /* Check if the stipple pattern is fully opaque.  If so, use software
1065     * rendering.  This basically a trick to make sure the OpenGL conformance
1066     * test passes.
1067     */
1068    allBitsSet = GL_TRUE;
1069    for (i = 0; i < 32; i++) {
1070       if (((GLuint *) mask)[i] != 0xffffffff) {
1071          allBitsSet = GL_FALSE;
1072          break;
1073       }
1074    }
1075    if (allBitsSet) {
1076       fxMesa->haveHwStipple = GL_FALSE;
1077       return;
1078    }
1079
1080    q[0] = mask[0];
1081    q[1] = mask[4];
1082    q[2] = mask[8];
1083    q[3] = mask[12];
1084
1085    for (k = 0 ; k < 8 ; k++)
1086       for (j = 0 ; j < 4; j++)
1087          for (i = 0 ; i < 4 ; i++,m++) {
1088             if (*m != q[j]) {
1089                fxMesa->haveHwStipple = GL_FALSE;
1090                return;
1091             }
1092          }
1093
1094    fxMesa->haveHwStipple = GL_TRUE;
1095    fxMesa->Stipple.Pattern = ( (q[0] << 0) |
1096                                (q[1] << 8) |
1097                                (q[2] << 16) |
1098                                (q[3] << 24) );
1099 }
1100
1101
1102
1103 static void tdfxDDRenderMode( GLcontext *ctx, GLenum mode )
1104 {
1105    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
1106    FALLBACK( fxMesa, TDFX_FALLBACK_RENDER_MODE, (mode != GL_RENDER) );
1107 }
1108
1109
1110
1111 static void tdfxDDPrintState( const char *msg, GLuint flags )
1112 {
1113    fprintf( stderr,
1114             "%s: (0x%x) %s%s%s%s%s%s%s%s%s%s%s%s%s\n",
1115             msg,
1116             flags,
1117             (flags & TDFX_NEW_COLOR) ? "color, " : "",
1118             (flags & TDFX_NEW_ALPHA) ? "alpha, " : "",
1119             (flags & TDFX_NEW_DEPTH) ? "depth, " : "",
1120             (flags & TDFX_NEW_RENDER) ? "render, " : "",
1121             (flags & TDFX_NEW_FOG) ? "fog, " : "",
1122             (flags & TDFX_NEW_STENCIL) ? "stencil, " : "",
1123             (flags & TDFX_NEW_STIPPLE) ? "stipple, " : "",
1124             (flags & TDFX_NEW_CLIP) ? "clip, " : "",
1125             (flags & TDFX_NEW_VIEWPORT) ? "viewport, " : "",
1126             (flags & TDFX_NEW_CULL) ? "cull, " : "",
1127             (flags & TDFX_NEW_GLIDE) ? "glide, " : "",
1128             (flags & TDFX_NEW_TEXTURE) ? "texture, " : "",
1129             (flags & TDFX_NEW_CONTEXT) ? "context, " : "");
1130 }
1131
1132
1133
1134 void tdfxDDUpdateHwState( GLcontext *ctx )
1135 {
1136    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
1137    int new_state = fxMesa->new_state;
1138
1139    if ( TDFX_DEBUG & DEBUG_VERBOSE_API ) {
1140       fprintf( stderr, "%s()\n", __FUNCTION__ );
1141    }
1142
1143    if ( new_state )
1144    {
1145       FLUSH_BATCH( fxMesa );
1146
1147       fxMesa->new_state = 0;
1148
1149       if ( 0 )
1150          tdfxDDPrintState( "tdfxUpdateHwState", new_state );
1151
1152       /* Update the various parts of the context's state.
1153        */
1154       if ( new_state & TDFX_NEW_ALPHA ) {
1155          tdfxUpdateAlphaMode( ctx );
1156       }
1157
1158       if ( new_state & TDFX_NEW_DEPTH )
1159          tdfxUpdateZMode( ctx );
1160
1161       if ( new_state & TDFX_NEW_FOG )
1162          tdfxUpdateFogAttrib( ctx );
1163
1164       if ( new_state & TDFX_NEW_CLIP )
1165          tdfxUpdateClipping( ctx );
1166
1167       if ( new_state & TDFX_NEW_STIPPLE )
1168          tdfxUpdateStipple( ctx );
1169
1170       if ( new_state & TDFX_NEW_CULL )
1171          tdfxUpdateCull( ctx );
1172
1173       if ( new_state & TDFX_NEW_LINE )
1174          tdfxUpdateLine( ctx );
1175
1176       if ( new_state & TDFX_NEW_VIEWPORT )
1177          tdfxUpdateViewport( ctx );
1178
1179       if ( new_state & TDFX_NEW_RENDER )
1180          tdfxUpdateRenderAttrib( ctx );
1181
1182       if ( new_state & TDFX_NEW_STENCIL )
1183          tdfxUpdateStencil( ctx );
1184
1185       if ( new_state & TDFX_NEW_TEXTURE ) {
1186          tdfxUpdateTextureState( ctx );
1187       }
1188       else if ( new_state & TDFX_NEW_TEXTURE_BIND ) {
1189          tdfxUpdateTextureBinding( ctx );
1190       }
1191    }
1192
1193    if ( 0 ) {
1194       FxI32 bias = (FxI32) (ctx->Polygon.OffsetUnits * TDFX_DEPTH_BIAS_SCALE);
1195
1196       if ( fxMesa->Depth.Bias != bias ) {
1197          fxMesa->Depth.Bias = bias;
1198          fxMesa->dirty |= TDFX_UPLOAD_DEPTH_BIAS;
1199       }
1200    }
1201
1202    if ( fxMesa->dirty ) {
1203       LOCK_HARDWARE( fxMesa );
1204       tdfxEmitHwStateLocked( fxMesa );
1205       UNLOCK_HARDWARE( fxMesa );
1206    }
1207 }
1208
1209
1210 static void tdfxDDInvalidateState( GLcontext *ctx, GLuint new_state )
1211 {
1212    _swrast_InvalidateState( ctx, new_state );
1213    _swsetup_InvalidateState( ctx, new_state );
1214    _ac_InvalidateState( ctx, new_state );
1215    _tnl_InvalidateState( ctx, new_state );
1216    TDFX_CONTEXT(ctx)->new_gl_state |= new_state;
1217 }
1218
1219
1220
1221 /* Initialize the context's Glide state mirror.  These values will be
1222  * used as Glide function call parameters when the time comes.
1223  */
1224 void tdfxInitState( tdfxContextPtr fxMesa )
1225 {
1226    GLcontext *ctx = fxMesa->glCtx;
1227    GLint i;
1228
1229    fxMesa->ColorCombine.Function        = GR_COMBINE_FUNCTION_LOCAL;
1230    fxMesa->ColorCombine.Factor          = GR_COMBINE_FACTOR_NONE;
1231    fxMesa->ColorCombine.Local           = GR_COMBINE_LOCAL_ITERATED;
1232    fxMesa->ColorCombine.Other           = GR_COMBINE_OTHER_NONE;
1233    fxMesa->ColorCombine.Invert          = FXFALSE;
1234    fxMesa->AlphaCombine.Function        = GR_COMBINE_FUNCTION_LOCAL;
1235    fxMesa->AlphaCombine.Factor          = GR_COMBINE_FACTOR_NONE;
1236    fxMesa->AlphaCombine.Local           = GR_COMBINE_LOCAL_ITERATED;
1237    fxMesa->AlphaCombine.Other           = GR_COMBINE_OTHER_NONE;
1238    fxMesa->AlphaCombine.Invert          = FXFALSE;
1239
1240    fxMesa->ColorCombineExt.SourceA      = GR_CMBX_ITRGB;
1241    fxMesa->ColorCombineExt.ModeA        = GR_FUNC_MODE_X;
1242    fxMesa->ColorCombineExt.SourceB      = GR_CMBX_ZERO;
1243    fxMesa->ColorCombineExt.ModeB        = GR_FUNC_MODE_ZERO;
1244    fxMesa->ColorCombineExt.SourceC      = GR_CMBX_ZERO;
1245    fxMesa->ColorCombineExt.InvertC      = FXTRUE;
1246    fxMesa->ColorCombineExt.SourceD      = GR_CMBX_ZERO;
1247    fxMesa->ColorCombineExt.InvertD      = FXFALSE;
1248    fxMesa->ColorCombineExt.Shift        = 0;
1249    fxMesa->ColorCombineExt.Invert       = FXFALSE;
1250    fxMesa->AlphaCombineExt.SourceA      = GR_CMBX_ITALPHA;
1251    fxMesa->AlphaCombineExt.ModeA        = GR_FUNC_MODE_X;
1252    fxMesa->AlphaCombineExt.SourceB      = GR_CMBX_ZERO;
1253    fxMesa->AlphaCombineExt.ModeB        = GR_FUNC_MODE_ZERO;
1254    fxMesa->AlphaCombineExt.SourceC      = GR_CMBX_ZERO;
1255    fxMesa->AlphaCombineExt.InvertC      = FXTRUE;
1256    fxMesa->AlphaCombineExt.SourceD      = GR_CMBX_ZERO;
1257    fxMesa->AlphaCombineExt.InvertD      = FXFALSE;
1258    fxMesa->AlphaCombineExt.Shift        = 0;
1259    fxMesa->AlphaCombineExt.Invert       = FXFALSE;
1260
1261    fxMesa->sScale0 = fxMesa->tScale0 = 1.0;
1262    fxMesa->sScale1 = fxMesa->tScale1 = 1.0;
1263
1264    fxMesa->TexPalette.Type = 0;
1265    fxMesa->TexPalette.Data = NULL;
1266
1267    for ( i = 0 ; i < TDFX_NUM_TMU ; i++ ) {
1268       fxMesa->TexSource[i].StartAddress = 0;
1269       fxMesa->TexSource[i].EvenOdd      = GR_MIPMAPLEVELMASK_EVEN;
1270       fxMesa->TexSource[i].Info         = NULL;
1271
1272       fxMesa->TexCombine[i].FunctionRGB         = 0;
1273       fxMesa->TexCombine[i].FactorRGB           = 0;
1274       fxMesa->TexCombine[i].FunctionAlpha       = 0;
1275       fxMesa->TexCombine[i].FactorAlpha         = 0;
1276       fxMesa->TexCombine[i].InvertRGB           = FXFALSE;
1277       fxMesa->TexCombine[i].InvertAlpha         = FXFALSE;
1278
1279       fxMesa->TexCombineExt[i].Alpha.SourceA    = 0;
1280       /* XXX more state to init here */
1281       fxMesa->TexCombineExt[i].Color.SourceA    = 0;
1282       fxMesa->TexCombineExt[i].EnvColor        = 0x0;
1283
1284       fxMesa->TexParams[i].sClamp       = GR_TEXTURECLAMP_WRAP;
1285       fxMesa->TexParams[i].tClamp       = GR_TEXTURECLAMP_WRAP;
1286       fxMesa->TexParams[i].minFilt      = GR_TEXTUREFILTER_POINT_SAMPLED;
1287       fxMesa->TexParams[i].magFilt      = GR_TEXTUREFILTER_BILINEAR;
1288       fxMesa->TexParams[i].mmMode       = GR_MIPMAP_DISABLE;
1289       fxMesa->TexParams[i].LODblend     = FXFALSE;
1290       fxMesa->TexParams[i].LodBias      = 0.0;
1291
1292       fxMesa->TexState.EnvMode[i]       = ~0;
1293       fxMesa->TexState.TexFormat[i]     = ~0;
1294       fxMesa->TexState.Enabled[i]       = 0;
1295    }
1296
1297    if ( ctx->Visual.doubleBufferMode) {
1298       fxMesa->DrawBuffer                = GR_BUFFER_BACKBUFFER;
1299       fxMesa->ReadBuffer                = GR_BUFFER_BACKBUFFER;
1300    } else {
1301       fxMesa->DrawBuffer                = GR_BUFFER_FRONTBUFFER;
1302       fxMesa->ReadBuffer                = GR_BUFFER_FRONTBUFFER;
1303    }
1304
1305    fxMesa->Color.ClearColor             = 0x00000000;
1306    fxMesa->Color.ClearAlpha             = 0x00;
1307    fxMesa->Color.ColorMask[RCOMP]       = FXTRUE;
1308    fxMesa->Color.ColorMask[BCOMP]       = FXTRUE;
1309    fxMesa->Color.ColorMask[GCOMP]       = FXTRUE;
1310    fxMesa->Color.ColorMask[ACOMP]       = FXTRUE;
1311    fxMesa->Color.MonoColor              = 0xffffffff;
1312
1313    fxMesa->Color.AlphaFunc              = GR_CMP_ALWAYS;
1314    fxMesa->Color.AlphaRef               = 0x00;
1315    fxMesa->Color.BlendSrcRGB            = GR_BLEND_ONE;
1316    fxMesa->Color.BlendDstRGB            = GR_BLEND_ZERO;
1317    fxMesa->Color.BlendSrcA              = GR_BLEND_ONE;
1318    fxMesa->Color.BlendSrcA              = GR_BLEND_ZERO;
1319
1320    fxMesa->Color.Dither                 = GR_DITHER_2x2;
1321
1322    if ( fxMesa->glCtx->Visual.depthBits > 0 ) {
1323       fxMesa->Depth.Mode                = GR_DEPTHBUFFER_ZBUFFER;
1324    } else {
1325       fxMesa->Depth.Mode                = GR_DEPTHBUFFER_DISABLE;
1326    }
1327    fxMesa->Depth.Bias                   = 0;
1328    fxMesa->Depth.Func                   = GR_CMP_LESS;
1329    fxMesa->Depth.Clear                  = 0; /* computed later */
1330    fxMesa->Depth.Mask                   = FXTRUE;
1331
1332
1333    fxMesa->Fog.Mode                     = GR_FOG_DISABLE;
1334    fxMesa->Fog.Color                    = 0x00000000;
1335    fxMesa->Fog.Table                    = NULL;
1336    fxMesa->Fog.Density                  = 1.0;
1337    fxMesa->Fog.Near                     = 1.0;
1338    fxMesa->Fog.Far                      = 1.0;
1339
1340    fxMesa->Stencil.Function             = GR_CMP_ALWAYS;
1341    fxMesa->Stencil.RefValue             = 0;
1342    fxMesa->Stencil.ValueMask            = 0xff;
1343    fxMesa->Stencil.WriteMask            = 0xff;
1344    fxMesa->Stencil.FailFunc             = 0;
1345    fxMesa->Stencil.ZFailFunc            = 0;
1346    fxMesa->Stencil.ZPassFunc            = 0;
1347    fxMesa->Stencil.Clear                = 0;
1348
1349    fxMesa->Stipple.Mode                 = GR_STIPPLE_DISABLE;
1350    fxMesa->Stipple.Pattern              = 0xffffffff;
1351
1352    fxMesa->Scissor.minX                 = 0;
1353    fxMesa->Scissor.minY                 = 0;
1354    fxMesa->Scissor.maxX                 = 0;
1355    fxMesa->Scissor.maxY                 = 0;
1356
1357    fxMesa->Viewport.Mode                = GR_WINDOW_COORDS;
1358    fxMesa->Viewport.X                   = 0;
1359    fxMesa->Viewport.Y                   = 0;
1360    fxMesa->Viewport.Width               = 0;
1361    fxMesa->Viewport.Height              = 0;
1362    fxMesa->Viewport.Near                = 0.0;
1363    fxMesa->Viewport.Far                 = 0.0;
1364
1365    fxMesa->CullMode                     = GR_CULL_DISABLE;
1366
1367    fxMesa->Glide.ColorFormat            = GR_COLORFORMAT_ABGR;
1368    fxMesa->Glide.Origin                 = GR_ORIGIN_LOWER_LEFT;
1369    fxMesa->Glide.Initialized            = FXFALSE;
1370 }
1371
1372
1373
1374 void tdfxDDInitStateFuncs( GLcontext *ctx )
1375 {
1376    tdfxContextPtr fxMesa = TDFX_CONTEXT(ctx);
1377
1378    ctx->Driver.UpdateState              = tdfxDDInvalidateState;
1379
1380
1381    /* State notification callbacks:
1382     */
1383    ctx->Driver.ClearColor               = tdfxDDClearColor;
1384    ctx->Driver.DrawBuffer               = tdfxDDDrawBuffer;
1385    ctx->Driver.ReadBuffer               = tdfxDDReadBuffer;
1386
1387    ctx->Driver.ColorMask                = tdfxDDColorMask;
1388
1389    ctx->Driver.AlphaFunc                = tdfxDDAlphaFunc;
1390    ctx->Driver.BlendEquation            = tdfxDDBlendEquation;
1391    ctx->Driver.BlendFuncSeparate        = tdfxDDBlendFuncSeparate;
1392    ctx->Driver.ClearDepth               = tdfxDDClearDepth;
1393    ctx->Driver.CullFace                 = tdfxDDCullFace;
1394    ctx->Driver.FrontFace                = tdfxDDFrontFace;
1395    ctx->Driver.DepthFunc                = tdfxDDDepthFunc;
1396    ctx->Driver.DepthMask                = tdfxDDDepthMask;
1397    ctx->Driver.DepthRange               = tdfxDDDepthRange;
1398    ctx->Driver.Enable                   = tdfxDDEnable;
1399    ctx->Driver.Fogfv                    = tdfxDDFogfv;
1400    ctx->Driver.LightModelfv             = tdfxDDLightModelfv;
1401    ctx->Driver.LineWidth                = tdfxDDLineWidth;
1402    ctx->Driver.PolygonStipple           = tdfxDDPolygonStipple;
1403    ctx->Driver.RenderMode               = tdfxDDRenderMode;
1404    ctx->Driver.Scissor                  = tdfxDDScissor;
1405    ctx->Driver.ShadeModel               = tdfxDDShadeModel;
1406
1407 /*     ctx->Driver.GetTexImage          = tdfxDDGetTexImage; */
1408    ctx->Driver.UpdateTexturePalette     = tdfxDDTexturePalette;
1409
1410    if ( fxMesa->haveHwStencil ) {
1411       ctx->Driver.StencilFunc           = tdfxDDStencilFunc;
1412       ctx->Driver.StencilMask           = tdfxDDStencilMask;
1413       ctx->Driver.StencilOp             = tdfxDDStencilOp;
1414    }
1415
1416    ctx->Driver.Viewport                 = tdfxDDViewport;
1417
1418    /* Swrast hooks for imaging extensions:
1419     */
1420    ctx->Driver.CopyColorTable = _swrast_CopyColorTable;
1421    ctx->Driver.CopyColorSubTable = _swrast_CopyColorSubTable;
1422    ctx->Driver.CopyConvolutionFilter1D = _swrast_CopyConvolutionFilter1D;
1423    ctx->Driver.CopyConvolutionFilter2D = _swrast_CopyConvolutionFilter2D;
1424 }