src/mesa/drivers/dri/r200/r200_tcl.c

   1 /*
   2 Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   3
   4 The Weather Channel (TM) funded Tungsten Graphics to develop the
   5 initial release of the Radeon 8500 driver under the XFree86 license.
   6 This notice must be preserved.
   7
   8 Permission is hereby granted, free of charge, to any person obtaining
   9 a copy of this software and associated documentation files (the
  10 "Software"), to deal in the Software without restriction, including
  11 without limitation the rights to use, copy, modify, merge, publish,
  12 distribute, sublicense, and/or sell copies of the Software, and to
  13 permit persons to whom the Software is furnished to do so, subject to
  14 the following conditions:
  15
  16 The above copyright notice and this permission notice (including the
  17 next paragraph) shall be included in all copies or substantial
  18 portions of the Software.
  19
  20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  23 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  24 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27
  28 **************************************************************************/
  29
  30 /*
  31  * Authors:
  32  *   Keith Whitwell <keith@tungstengraphics.com>
  33  */
  34
  35 #include "main/glheader.h"
  36 #include "main/imports.h"
  37 #include "main/mtypes.h"
  38 #include "main/enums.h"
  39 #include "main/colormac.h"
  40 #include "main/light.h"
  41
  42 #include "vbo/vbo.h"
  43 #include "tnl/tnl.h"
  44 #include "tnl/t_pipeline.h"
  45
  46 #include "r200_context.h"
  47 #include "r200_state.h"
  48 #include "r200_ioctl.h"
  49 #include "r200_tex.h"
  50 #include "r200_tcl.h"
  51 #include "r200_swtcl.h"
  52 #include "r200_maos.h"
  53
  54 #include "radeon_common_context.h"
  55
  56
  57
  58 #define HAVE_POINTS      1
  59 #define HAVE_LINES       1
  60 #define HAVE_LINE_LOOP   0
  61 #define HAVE_LINE_STRIPS 1
  62 #define HAVE_TRIANGLES   1
  63 #define HAVE_TRI_STRIPS  1
  64 #define HAVE_TRI_STRIP_1 0
  65 #define HAVE_TRI_FANS    1
  66 #define HAVE_QUADS       1
  67 #define HAVE_QUAD_STRIPS 1
  68 #define HAVE_POLYGONS    1
  69 #define HAVE_ELTS        1
  70
  71
  72 #define HW_POINTS           ((ctx->Point.PointSprite || \
  73                                 ((ctx->_TriangleCaps & (DD_POINT_SIZE | DD_POINT_ATTEN)) && \
  74                                 !(ctx->_TriangleCaps & (DD_POINT_SMOOTH)))) ? \
  75                                 R200_VF_PRIM_POINT_SPRITES : R200_VF_PRIM_POINTS)
  76 #define HW_LINES            R200_VF_PRIM_LINES
  77 #define HW_LINE_LOOP        0
  78 #define HW_LINE_STRIP       R200_VF_PRIM_LINE_STRIP
  79 #define HW_TRIANGLES        R200_VF_PRIM_TRIANGLES
  80 #define HW_TRIANGLE_STRIP_0 R200_VF_PRIM_TRIANGLE_STRIP
  81 #define HW_TRIANGLE_STRIP_1 0
  82 #define HW_TRIANGLE_FAN     R200_VF_PRIM_TRIANGLE_FAN
  83 #define HW_QUADS            R200_VF_PRIM_QUADS
  84 #define HW_QUAD_STRIP       R200_VF_PRIM_QUAD_STRIP
  85 #define HW_POLYGON          R200_VF_PRIM_POLYGON
  86
  87
  88 static GLboolean discrete_prim[0x10] = {
  89    0,                           /* 0 none */
  90    1,                           /* 1 points */
  91    1,                           /* 2 lines */
  92    0,                           /* 3 line_strip */
  93    1,                           /* 4 tri_list */
  94    0,                           /* 5 tri_fan */
  95    0,                           /* 6 tri_strip */
  96    0,                           /* 7 tri_w_flags */
  97    1,                           /* 8 rect list (unused) */
  98    1,                           /* 9 3vert point */
  99    1,                           /* a 3vert line */
 100    0,                           /* b point sprite */
 101    0,                           /* c line loop */
 102    1,                           /* d quads */
 103    0,                           /* e quad strip */
 104    0,                           /* f polygon */
 105 };
 106
 107
 108 #define LOCAL_VARS r200ContextPtr rmesa = R200_CONTEXT(ctx)
 109 #define ELT_TYPE  GLushort
 110
 111 #define ELT_INIT(prim, hw_prim) \
 112    r200TclPrimitive( ctx, prim, hw_prim | R200_VF_PRIM_WALK_IND )
 113
 114 #define GET_MESA_ELTS() TNL_CONTEXT(ctx)->vb.Elts
 115
 116
 117 /* Don't really know how many elts will fit in what's left of cmdbuf,
 118  * as there is state to emit, etc:
 119  */
 120
 121 /* Testing on isosurf shows a maximum around here.  Don't know if it's
 122  * the card or driver or kernel module that is causing the behaviour.
 123  */
 124 #define GET_MAX_HW_ELTS() 300
 125
 126 #define RESET_STIPPLE() do {                    \
 127    R200_STATECHANGE( rmesa, lin );              \
 128    radeonEmitState(&rmesa->radeon);                     \
 129 } while (0)
 130
 131 #define AUTO_STIPPLE( mode )  do {              \
 132    R200_STATECHANGE( rmesa, lin );              \
 133    if (mode)                                    \
 134       rmesa->hw.lin.cmd[LIN_RE_LINE_PATTERN] |= \
 135          R200_LINE_PATTERN_AUTO_RESET;  \
 136    else                                         \
 137       rmesa->hw.lin.cmd[LIN_RE_LINE_PATTERN] &= \
 138          ~R200_LINE_PATTERN_AUTO_RESET; \
 139    radeonEmitState(&rmesa->radeon);                     \
 140 } while (0)
 141
 142
 143 #define ALLOC_ELTS(nr)  r200AllocElts( rmesa, nr )
 144
 145 static GLushort *r200AllocElts( r200ContextPtr rmesa, GLuint nr )
 146 {
 147    if (rmesa->radeon.dma.flush == r200FlushElts &&
 148        rmesa->tcl.elt_used + nr*2 < R200_ELT_BUF_SZ) {
 149
 150       GLushort *dest = (GLushort *)(rmesa->radeon.tcl.elt_dma_bo->ptr +
 151                                     rmesa->radeon.tcl.elt_dma_offset + rmesa->tcl.elt_used);
 152
 153       rmesa->tcl.elt_used += nr*2;
 154
 155       return dest;
 156    }
 157    else {
 158       if (rmesa->radeon.dma.flush)
 159          rmesa->radeon.dma.flush( rmesa->radeon.glCtx );
 160
 161       r200EmitAOS( rmesa,
 162                    rmesa->radeon.tcl.aos_count, 0 );
 163
 164       return r200AllocEltsOpenEnded( rmesa, rmesa->tcl.hw_primitive, nr );
 165    }
 166 }
 167
 168
 169 #define CLOSE_ELTS()                            \
 170 do {                                            \
 171    if (0) R200_NEWPRIM( rmesa );                \
 172 }                                               \
 173 while (0)
 174
 175
 176 /* TODO: Try to extend existing primitive if both are identical,
 177  * discrete and there are no intervening state changes.  (Somewhat
 178  * duplicates changes to DrawArrays code)
 179  */
 180 static void r200EmitPrim( GLcontext *ctx,
 181                           GLenum prim,
 182                           GLuint hwprim,
 183                           GLuint start,
 184                           GLuint count)
 185 {
 186    r200ContextPtr rmesa = R200_CONTEXT( ctx );
 187    r200TclPrimitive( ctx, prim, hwprim );
 188
 189    //   fprintf(stderr,"Emit prim %d\n", rmesa->radeon.tcl.aos_count);
 190
 191    r200EmitAOS( rmesa,
 192                 rmesa->radeon.tcl.aos_count,
 193                 start );
 194
 195    /* Why couldn't this packet have taken an offset param?
 196     */
 197    r200EmitVbufPrim( rmesa,
 198                      rmesa->tcl.hw_primitive,
 199                      count - start );
 200 }
 201
 202 #define EMIT_PRIM(ctx, prim, hwprim, start, count) do {         \
 203    r200EmitPrim( ctx, prim, hwprim, start, count );             \
 204    (void) rmesa; } while (0)
 205
 206 #define MAX_CONVERSION_SIZE 40
 207 /* Try & join small primitives
 208  */
 209 #if 0
 210 #define PREFER_DISCRETE_ELT_PRIM( NR, PRIM ) 0
 211 #else
 212 #define PREFER_DISCRETE_ELT_PRIM( NR, PRIM )                    \
 213   ((NR) < 20 ||                                                 \
 214    ((NR) < 40 &&                                                \
 215     rmesa->tcl.hw_primitive == (PRIM|                           \
 216                             R200_VF_TCL_OUTPUT_VTX_ENABLE|      \
 217                                 R200_VF_PRIM_WALK_IND)))
 218 #endif
 219
 220 #ifdef MESA_BIG_ENDIAN
 221 /* We could do without (most of) this ugliness if dest was always 32 bit word aligned... */
 222 #define EMIT_ELT(dest, offset, x) do {                          \
 223         int off = offset + ( ( (GLuint)dest & 0x2 ) >> 1 );     \
 224         GLushort *des = (GLushort *)( (GLuint)dest & ~0x2 );    \
 225         (des)[ off + 1 - 2 * ( off & 1 ) ] = (GLushort)(x);     \
 226         (void)rmesa; } while (0)
 227 #else
 228 #define EMIT_ELT(dest, offset, x) do {                          \
 229         (dest)[offset] = (GLushort) (x);                        \
 230         (void)rmesa; } while (0)
 231 #endif
 232
 233 #define EMIT_TWO_ELTS(dest, offset, x, y)  *(GLuint *)((dest)+offset) = ((y)<<16)|(x);
 234
 235
 236
 237 #define TAG(x) tcl_##x
 238 #include "tnl_dd/t_dd_dmatmp2.h"
 239
 240 /**********************************************************************/
 241 /*                          External entrypoints                     */
 242 /**********************************************************************/
 243
 244 void r200EmitPrimitive( GLcontext *ctx,
 245                           GLuint first,
 246                           GLuint last,
 247                           GLuint flags )
 248 {
 249    tcl_render_tab_verts[flags&PRIM_MODE_MASK]( ctx, first, last, flags );
 250 }
 251
 252 void r200EmitEltPrimitive( GLcontext *ctx,
 253                              GLuint first,
 254                              GLuint last,
 255                              GLuint flags )
 256 {
 257    tcl_render_tab_elts[flags&PRIM_MODE_MASK]( ctx, first, last, flags );
 258 }
 259
 260 void r200TclPrimitive( GLcontext *ctx,
 261                          GLenum prim,
 262                          int hw_prim )
 263 {
 264    r200ContextPtr rmesa = R200_CONTEXT(ctx);
 265    GLuint newprim = hw_prim | R200_VF_TCL_OUTPUT_VTX_ENABLE;
 266
 267    if (newprim != rmesa->tcl.hw_primitive ||
 268        !discrete_prim[hw_prim&0xf]) {
 269       /* need to disable perspective-correct texturing for point sprites */
 270       if ((prim & PRIM_MODE_MASK) == GL_POINTS && ctx->Point.PointSprite) {
 271          if (rmesa->hw.set.cmd[SET_RE_CNTL] & R200_PERSPECTIVE_ENABLE) {
 272             R200_STATECHANGE( rmesa, set );
 273             rmesa->hw.set.cmd[SET_RE_CNTL] &= ~R200_PERSPECTIVE_ENABLE;
 274          }
 275       }
 276       else if (!(rmesa->hw.set.cmd[SET_RE_CNTL] & R200_PERSPECTIVE_ENABLE)) {
 277          R200_STATECHANGE( rmesa, set );
 278          rmesa->hw.set.cmd[SET_RE_CNTL] |= R200_PERSPECTIVE_ENABLE;
 279       }
 280       R200_NEWPRIM( rmesa );
 281       rmesa->tcl.hw_primitive = newprim;
 282    }
 283 }
 284
 285
 286 /**********************************************************************/
 287 /*             Fog blend factor computation for hw tcl                */
 288 /*             same calculation used as in t_vb_fog.c                 */
 289 /**********************************************************************/
 290
 291 #define FOG_EXP_TABLE_SIZE 256
 292 #define FOG_MAX (10.0)
 293 #define EXP_FOG_MAX .0006595
 294 #define FOG_INCR (FOG_MAX/FOG_EXP_TABLE_SIZE)
 295 static GLfloat exp_table[FOG_EXP_TABLE_SIZE];
 296
 297 #if 1
 298 #define NEG_EXP( result, narg )                                         \
 299 do {                                                                    \
 300    GLfloat f = (GLfloat) (narg * (1.0/FOG_INCR));                       \
 301    GLint k = (GLint) f;                                                 \
 302    if (k > FOG_EXP_TABLE_SIZE-2)                                        \
 303       result = (GLfloat) EXP_FOG_MAX;                                   \
 304    else                                                                 \
 305       result = exp_table[k] + (f-k)*(exp_table[k+1]-exp_table[k]);      \
 306 } while (0)
 307 #else
 308 #define NEG_EXP( result, narg )                                 \
 309 do {                                                            \
 310    result = exp(-narg);                                         \
 311 } while (0)
 312 #endif
 313
 314
 315 /**
 316  * Initialize the exp_table[] lookup table for approximating exp().
 317  */
 318 void
 319 r200InitStaticFogData( void )
 320 {
 321    GLfloat f = 0.0F;
 322    GLint i = 0;
 323    for ( ; i < FOG_EXP_TABLE_SIZE ; i++, f += FOG_INCR) {
 324       exp_table[i] = (GLfloat) exp(-f);
 325    }
 326 }
 327
 328
 329 /**
 330  * Compute per-vertex fog blend factors from fog coordinates by
 331  * evaluating the GL_LINEAR, GL_EXP or GL_EXP2 fog function.
 332  * Fog coordinates are distances from the eye (typically between the
 333  * near and far clip plane distances).
 334  * Note the fog (eye Z) coords may be negative so we use ABS(z) below.
 335  * Fog blend factors are in the range [0,1].
 336  */
 337 float
 338 r200ComputeFogBlendFactor( GLcontext *ctx, GLfloat fogcoord )
 339 {
 340    GLfloat end  = ctx->Fog.End;
 341    GLfloat d, temp;
 342    const GLfloat z = FABSF(fogcoord);
 343
 344    switch (ctx->Fog.Mode) {
 345    case GL_LINEAR:
 346       if (ctx->Fog.Start == ctx->Fog.End)
 347          d = 1.0F;
 348       else
 349          d = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
 350       temp = (end - z) * d;
 351       return CLAMP(temp, 0.0F, 1.0F);
 352       break;
 353    case GL_EXP:
 354       d = ctx->Fog.Density;
 355       NEG_EXP( temp, d * z );
 356       return temp;
 357       break;
 358    case GL_EXP2:
 359       d = ctx->Fog.Density*ctx->Fog.Density;
 360       NEG_EXP( temp, d * z * z );
 361       return temp;
 362       break;
 363    default:
 364       _mesa_problem(ctx, "Bad fog mode in make_fog_coord");
 365       return 0;
 366    }
 367 }
 368
 369 /**
 370  * Predict total emit size for next rendering operation so there is no flush in middle of rendering
 371  * Prediction has to aim towards the best possible value that is worse than worst case scenario
 372  */
 373 static GLuint r200EnsureEmitSize( GLcontext * ctx , GLubyte* vimap_rev )
 374 {
 375   r200ContextPtr rmesa = R200_CONTEXT(ctx);
 376   TNLcontext *tnl = TNL_CONTEXT(ctx);
 377   struct vertex_buffer *VB = &tnl->vb;
 378   GLuint space_required;
 379   GLuint state_size;
 380   GLuint nr_aos = 0;
 381   int i;
 382   /* predict number of aos to emit */
 383   for (i = 0; i < 15; ++i)
 384   {
 385     if (vimap_rev[i] != 255)
 386     {
 387       ++nr_aos;
 388     }
 389   }
 390
 391   {
 392     /* count the prediction for state size */
 393     space_required = 0;
 394     state_size = radeonCountStateEmitSize( &rmesa->radeon );
 395     /* vtx may be changed in r200EmitArrays so account for it if not dirty */
 396     if (!rmesa->hw.vtx.dirty)
 397       state_size += rmesa->hw.vtx.check(rmesa->radeon.glCtx, &rmesa->hw.vtx);
 398     /* predict size for elements */
 399     for (i = 0; i < VB->PrimitiveCount; ++i)
 400     {
 401       if (!VB->Primitive[i].count)
 402         continue;
 403       /* If primitive.count is less than MAX_CONVERSION_SIZE
 404          rendering code may decide convert to elts.
 405          In that case we have to make pessimistic prediction.
 406          and use larger of 2 paths. */
 407       const GLuint elts = ELTS_BUFSZ(nr_aos);
 408       const GLuint index = INDEX_BUFSZ;
 409       const GLuint vbuf = VBUF_BUFSZ;
 410       if ( (!VB->Elts && VB->Primitive[i].count >= MAX_CONVERSION_SIZE)
 411           || vbuf > index + elts)
 412         space_required += vbuf;
 413       else
 414         space_required += index + elts;
 415       space_required += AOS_BUFSZ(nr_aos);
 416     }
 417     space_required += SCISSOR_BUFSZ;
 418   }
 419   /* flush the buffer in case we need more than is left. */
 420   if (rcommonEnsureCmdBufSpace(&rmesa->radeon, space_required + state_size, __FUNCTION__))
 421     return space_required + radeonCountStateEmitSize( &rmesa->radeon );
 422   else
 423     return space_required + state_size;
 424 }
 425
 426
 427 /**********************************************************************/
 428 /*                          Render pipeline stage                     */
 429 /**********************************************************************/
 430
 431
 432 /* TCL render.
 433  */
 434 static GLboolean r200_run_tcl_render( GLcontext *ctx,
 435                                       struct tnl_pipeline_stage *stage )
 436 {
 437    r200ContextPtr rmesa = R200_CONTEXT(ctx);
 438    TNLcontext *tnl = TNL_CONTEXT(ctx);
 439    struct vertex_buffer *VB = &tnl->vb;
 440    GLuint i;
 441    GLubyte *vimap_rev;
 442 /* use hw fixed order for simplicity, pos 0, weight 1, normal 2, fog 3,
 443    color0 - color3 4-7, texcoord0 - texcoord5 8-13, pos 1 14. Must not use
 444    more than 12 of those at the same time. */
 445    GLubyte map_rev_fixed[15] = {255, 255, 255, 255, 255, 255, 255, 255,
 446                             255, 255, 255, 255, 255, 255, 255};
 447
 448
 449    /* TODO: separate this from the swtnl pipeline
 450     */
 451    if (rmesa->radeon.TclFallback)
 452       return GL_TRUE;   /* fallback to software t&l */
 453
 454    if (R200_DEBUG & DEBUG_PRIMS)
 455       fprintf(stderr, "%s\n", __FUNCTION__);
 456
 457    if (VB->Count == 0)
 458       return GL_FALSE;
 459
 460    /* Validate state:
 461     */
 462    if (rmesa->radeon.NewGLState)
 463       if (!r200ValidateState( ctx ))
 464          return GL_TRUE; /* fallback to sw t&l */
 465
 466    if (!ctx->VertexProgram._Enabled) {
 467    /* NOTE: inputs != tnl->render_inputs - these are the untransformed
 468     * inputs.
 469     */
 470       map_rev_fixed[0] = VERT_ATTRIB_POS;
 471       /* technically there is no reason we always need VA_COLOR0. In theory
 472          could disable it depending on lighting, color materials, texturing... */
 473       map_rev_fixed[4] = VERT_ATTRIB_COLOR0;
 474
 475       if (ctx->Light.Enabled) {
 476          map_rev_fixed[2] = VERT_ATTRIB_NORMAL;
 477       }
 478
 479       /* this also enables VA_COLOR1 when using separate specular
 480          lighting model, which is unnecessary.
 481          FIXME: OTOH, we're missing the case where a ATI_fragment_shader accesses
 482          the secondary color (if lighting is disabled). The chip seems
 483          misconfigured for that though elsewhere (tcl output, might lock up) */
 484       if (ctx->_TriangleCaps & DD_SEPARATE_SPECULAR) {
 485          map_rev_fixed[5] = VERT_ATTRIB_COLOR1;
 486       }
 487
 488       if ( (ctx->Fog.FogCoordinateSource == GL_FOG_COORD) && ctx->Fog.Enabled ) {
 489          map_rev_fixed[3] = VERT_ATTRIB_FOG;
 490       }
 491
 492       for (i = 0 ; i < ctx->Const.MaxTextureUnits; i++) {
 493          if (ctx->Texture.Unit[i]._ReallyEnabled) {
 494             if (rmesa->TexGenNeedNormals[i]) {
 495                map_rev_fixed[2] = VERT_ATTRIB_NORMAL;
 496             }
 497             map_rev_fixed[8 + i] = VERT_ATTRIB_TEX0 + i;
 498          }
 499       }
 500       vimap_rev = &map_rev_fixed[0];
 501    }
 502    else {
 503       /* vtx_tcl_output_vtxfmt_0/1 need to match configuration of "fragment
 504          part", since using some vertex interpolator later which is not in
 505          out_vtxfmt0/1 will lock up. It seems to be ok to write in vertex
 506          prog to a not enabled output however, so just don't mess with it.
 507          We only need to change compsel. */
 508       GLuint out_compsel = 0;
 509       GLuint vp_out = rmesa->curr_vp_hw->mesa_program.Base.OutputsWritten;
 510
 511       vimap_rev = &rmesa->curr_vp_hw->inputmap_rev[0];
 512       assert(vp_out & (1 << VERT_RESULT_HPOS));
 513       out_compsel = R200_OUTPUT_XYZW;
 514       if (vp_out & (1 << VERT_RESULT_COL0)) {
 515          out_compsel |= R200_OUTPUT_COLOR_0;
 516       }
 517       if (vp_out & (1 << VERT_RESULT_COL1)) {
 518          out_compsel |= R200_OUTPUT_COLOR_1;
 519       }
 520       if (vp_out & (1 << VERT_RESULT_FOGC)) {
 521          out_compsel |= R200_OUTPUT_DISCRETE_FOG;
 522       }
 523       if (vp_out & (1 << VERT_RESULT_PSIZ)) {
 524          out_compsel |= R200_OUTPUT_PT_SIZE;
 525       }
 526       for (i = VERT_RESULT_TEX0; i < VERT_RESULT_TEX6; i++) {
 527          if (vp_out & (1 << i)) {
 528             out_compsel |= R200_OUTPUT_TEX_0 << (i - VERT_RESULT_TEX0);
 529          }
 530       }
 531       if (rmesa->hw.vtx.cmd[VTX_TCL_OUTPUT_COMPSEL] != out_compsel) {
 532          R200_STATECHANGE( rmesa, vtx );
 533          rmesa->hw.vtx.cmd[VTX_TCL_OUTPUT_COMPSEL] = out_compsel;
 534       }
 535    }
 536
 537    /* Do the actual work:
 538     */
 539    radeonReleaseArrays( ctx, ~0 /* stage->changed_inputs */ );
 540    GLuint emit_end = r200EnsureEmitSize( ctx, vimap_rev )
 541      + rmesa->radeon.cmdbuf.cs->cdw;
 542    r200EmitArrays( ctx, vimap_rev );
 543
 544    for (i = 0 ; i < VB->PrimitiveCount ; i++)
 545    {
 546       GLuint prim = _tnl_translate_prim(&VB->Primitive[i]);
 547       GLuint start = VB->Primitive[i].start;
 548       GLuint length = VB->Primitive[i].count;
 549
 550       if (!length)
 551          continue;
 552
 553       if (VB->Elts)
 554          r200EmitEltPrimitive( ctx, start, start+length, prim );
 555       else
 556          r200EmitPrimitive( ctx, start, start+length, prim );
 557    }
 558    if ( emit_end < rmesa->radeon.cmdbuf.cs->cdw )
 559      WARN_ONCE("Rendering was %d commands larger than predicted size."
 560          " We might overflow  command buffer.\n", rmesa->radeon.cmdbuf.cs->cdw - emit_end);
 561
 562    return GL_FALSE;             /* finished the pipe */
 563 }
 564
 565
 566
 567 /* Initial state for tcl stage.
 568  */
 569 const struct tnl_pipeline_stage _r200_tcl_stage =
 570 {
 571    "r200 render",
 572    NULL,                        /*  private */
 573    NULL,
 574    NULL,
 575    NULL,
 576    r200_run_tcl_render  /* run */
 577 };
 578
 579
 580
 581 /**********************************************************************/
 582 /*                 Validate state at pipeline start                   */
 583 /**********************************************************************/
 584
 585
 586 /*-----------------------------------------------------------------------
 587  * Manage TCL fallbacks
 588  */
 589
 590
 591 static void transition_to_swtnl( GLcontext *ctx )
 592 {
 593    r200ContextPtr rmesa = R200_CONTEXT(ctx);
 594    TNLcontext *tnl = TNL_CONTEXT(ctx);
 595
 596    R200_NEWPRIM( rmesa );
 597
 598    r200ChooseVertexState( ctx );
 599    r200ChooseRenderState( ctx );
 600
 601    _mesa_validate_all_lighting_tables( ctx );
 602
 603    tnl->Driver.NotifyMaterialChange =
 604       _mesa_validate_all_lighting_tables;
 605
 606    radeonReleaseArrays( ctx, ~0 );
 607
 608    /* Still using the D3D based hardware-rasterizer from the radeon;
 609     * need to put the card into D3D mode to make it work:
 610     */
 611    R200_STATECHANGE( rmesa, vap );
 612    rmesa->hw.vap.cmd[VAP_SE_VAP_CNTL] &= ~(R200_VAP_TCL_ENABLE|R200_VAP_PROG_VTX_SHADER_ENABLE);
 613 }
 614
 615 static void transition_to_hwtnl( GLcontext *ctx )
 616 {
 617    r200ContextPtr rmesa = R200_CONTEXT(ctx);
 618    TNLcontext *tnl = TNL_CONTEXT(ctx);
 619
 620    _tnl_need_projected_coords( ctx, GL_FALSE );
 621
 622    r200UpdateMaterial( ctx );
 623
 624    tnl->Driver.NotifyMaterialChange = r200UpdateMaterial;
 625
 626    if ( rmesa->radeon.dma.flush )
 627       rmesa->radeon.dma.flush( rmesa->radeon.glCtx );
 628
 629    rmesa->radeon.dma.flush = NULL;
 630
 631    R200_STATECHANGE( rmesa, vap );
 632    rmesa->hw.vap.cmd[VAP_SE_VAP_CNTL] |= R200_VAP_TCL_ENABLE;
 633    rmesa->hw.vap.cmd[VAP_SE_VAP_CNTL] &= ~R200_VAP_FORCE_W_TO_ONE;
 634
 635    if (ctx->VertexProgram._Enabled) {
 636       rmesa->hw.vap.cmd[VAP_SE_VAP_CNTL] |= R200_VAP_PROG_VTX_SHADER_ENABLE;
 637    }
 638
 639    if ( ((rmesa->hw.ctx.cmd[CTX_PP_FOG_COLOR] & R200_FOG_USE_MASK)
 640       == R200_FOG_USE_SPEC_ALPHA) &&
 641       (ctx->Fog.FogCoordinateSource == GL_FOG_COORD )) {
 642       R200_STATECHANGE( rmesa, ctx );
 643       rmesa->hw.ctx.cmd[CTX_PP_FOG_COLOR] &= ~R200_FOG_USE_MASK;
 644       rmesa->hw.ctx.cmd[CTX_PP_FOG_COLOR] |= R200_FOG_USE_VTX_FOG;
 645    }
 646
 647    R200_STATECHANGE( rmesa, vte );
 648    rmesa->hw.vte.cmd[VTE_SE_VTE_CNTL] &= ~(R200_VTX_XY_FMT|R200_VTX_Z_FMT);
 649    rmesa->hw.vte.cmd[VTE_SE_VTE_CNTL] |= R200_VTX_W0_FMT;
 650
 651    if (R200_DEBUG & DEBUG_FALLBACKS)
 652       fprintf(stderr, "R200 end tcl fallback\n");
 653 }
 654
 655
 656 static char *fallbackStrings[] = {
 657    "Rasterization fallback",
 658    "Unfilled triangles",
 659    "Twosided lighting, differing materials",
 660    "Materials in VB (maybe between begin/end)",
 661    "Texgen unit 0",
 662    "Texgen unit 1",
 663    "Texgen unit 2",
 664    "Texgen unit 3",
 665    "Texgen unit 4",
 666    "Texgen unit 5",
 667    "User disable",
 668    "Bitmap as points",
 669    "Vertex program"
 670 };
 671
 672
 673 static char *getFallbackString(GLuint bit)
 674 {
 675    int i = 0;
 676    while (bit > 1) {
 677       i++;
 678       bit >>= 1;
 679    }
 680    return fallbackStrings[i];
 681 }
 682
 683
 684
 685 void r200TclFallback( GLcontext *ctx, GLuint bit, GLboolean mode )
 686 {
 687    r200ContextPtr rmesa = R200_CONTEXT(ctx);
 688    GLuint oldfallback = rmesa->radeon.TclFallback;
 689
 690    if (mode) {
 691       rmesa->radeon.TclFallback |= bit;
 692       if (oldfallback == 0) {
 693          if (R200_DEBUG & DEBUG_FALLBACKS)
 694             fprintf(stderr, "R200 begin tcl fallback %s\n",
 695                     getFallbackString( bit ));
 696          transition_to_swtnl( ctx );
 697       }
 698    }
 699    else {
 700       rmesa->radeon.TclFallback &= ~bit;
 701       if (oldfallback == bit) {
 702          if (R200_DEBUG & DEBUG_FALLBACKS)
 703             fprintf(stderr, "R200 end tcl fallback %s\n",
 704                     getFallbackString( bit ));
 705          transition_to_hwtnl( ctx );
 706       }
 707    }
 708 }