src/mesa/tnl/t_context.h

   1 /* $Id: t_context.h,v 1.41 2002/04/19 12:32:14 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  4.1
   6  *
   7  * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 /**
  28  * \file t_context.h
  29  * \brief TnL module datatypes and definitions.
  30  * \author Keith Whitwell
  31  */
  32
  33 #ifndef _T_CONTEXT_H
  34 #define _T_CONTEXT_H
  35
  36 #include "glheader.h"
  37 #include "mtypes.h"
  38
  39 #include "math/m_matrix.h"
  40 #include "math/m_vector.h"
  41 #include "math/m_xform.h"
  42
  43
  44 #define MAX_PIPELINE_STAGES     30
  45
  46
  47 /* Numbers for sizing immediate structs.
  48  */
  49 #define IMM_MAX_COPIED_VERTS  3
  50 #define IMM_MAXDATA          (216 + IMM_MAX_COPIED_VERTS)
  51 #define IMM_SIZE             (IMM_MAXDATA + MAX_CLIPPED_VERTICES)
  52
  53
  54 /* Values for IM->BeginState
  55  */
  56 #define VERT_BEGIN_0    0x1        /* glBegin (if initially inside beg/end) */
  57 #define VERT_BEGIN_1    0x2        /* glBegin (if initially outside beg/end) */
  58 #define VERT_ERROR_0    0x4        /* invalid_operation in initial state 0 */
  59 #define VERT_ERROR_1    0x8        /* invalid_operation in initial state 1 */
  60
  61
  62 /* Flags to be added to the primitive enum in VB->Primitive.
  63  */
  64 #define PRIM_MODE_MASK  0xff   /* Extract the actual primitive */
  65 #define PRIM_BEGIN      0x100  /* The prim starts here (not wrapped) */
  66 #define PRIM_END        0x200  /* The prim ends in this VB (does not wrap) */
  67 #define PRIM_PARITY     0x400  /* The prim wrapped on an odd number of verts */
  68 #define PRIM_LAST       0x800  /* No more prims in the VB */
  69
  70
  71 /**
  72  * Flags that describe the inputs and outputs of pipeline stages, and
  73  * the contents of a vertex-cassette.  We reuse the VERT_BIT_* flags
  74  * defined in mtypes.h and add a bunch of new ones.
  75  */
  76 /* bits 0..5 defined in mtypes.h */
  77 #define VERT_BIT_INDEX       VERT_BIT_SIX    /* a free vertex attrib bit */
  78 #define VERT_BIT_EDGEFLAG    VERT_BIT_SEVEN  /* a free vertex attrib bit */
  79 /* bits 8..15 defined in mtypes.h */
  80 #define VERT_BIT_EVAL_C1     (1 << 16)  /* imm only */
  81 #define VERT_BIT_EVAL_C2     (1 << 17)  /* imm only */
  82 #define VERT_BIT_EVAL_P1     (1 << 18)  /* imm only */
  83 #define VERT_BIT_EVAL_P2     (1 << 19)  /* imm only */
  84 #define VERT_BIT_OBJ_3       (1 << 20)  /* imm only */
  85 #define VERT_BIT_OBJ_4       (1 << 21)  /* imm only */
  86 #define VERT_BIT_MATERIAL    (1 << 22)  /* imm only, but tested in vb code */
  87 #define VERT_BIT_ELT         (1 << 23)  /* imm only */
  88 #define VERT_BIT_BEGIN       (1 << 24)  /* imm only, but tested in vb code */
  89 #define VERT_BIT_END         (1 << 25)  /* imm only, but tested in vb code */
  90 #define VERT_BIT_END_VB      (1 << 26)  /* imm only, but tested in vb code */
  91 #define VERT_BIT_POINT_SIZE  (1 << 27)  /* vb only, could reuse a bit */
  92 #define VERT_BIT_EYE         VERT_BIT_BEGIN /* vb only, reuse imm bit */
  93 #define VERT_BIT_CLIP        VERT_BIT_END   /* vb only, reuse imm bit*/
  94
  95
  96 /*
  97  * XXXX these are temporary - for backward compatibility w/ DRI drivers
  98  */
  99 #define VERT_OBJ             VERT_BIT_POS
 100 #define VERT_RGBA            VERT_BIT_COLOR0
 101 #define VERT_NORM            VERT_BIT_NORMAL
 102 #define VERT_INDEX           VERT_BIT_INDEX
 103 #define VERT_EDGE            VERT_BIT_SEVEN
 104 #define VERT_SPEC_RGB        VERT_BIT_COLOR1
 105 #define VERT_FOG_COORD       VERT_BIT_FOG
 106 #define VERT_TEX0            VERT_BIT_TEX0
 107 #define VERT_TEX1            VERT_BIT_TEX1
 108 #define VERT_TEX2            VERT_BIT_TEX2
 109 #define VERT_TEX3            VERT_BIT_TEX3
 110 #define VERT_TEX4            VERT_BIT_TEX4
 111 #define VERT_TEX5            VERT_BIT_TEX5
 112 #define VERT_TEX6            VERT_BIT_TEX6
 113 #define VERT_TEX7            VERT_BIT_TEX7
 114 #define VERT_EVAL_C1         VERT_BIT_EVAL_C1
 115 #define VERT_EVAL_C2         VERT_BIT_EVAL_C2
 116 #define VERT_EVAL_P1         VERT_BIT_EVAL_P1
 117 #define VERT_EVAL_P2         VERT_BIT_EVAL_P2
 118 #define VERT_OBJ_3           VERT_BIT_OBJ_3
 119 #define VERT_OBJ_4           VERT_BIT_OBJ_4
 120 #define VERT_MATERIAL        VERT_BIT_MATERIAL
 121 #define VERT_ELT             VERT_BIT_ELT
 122 #define VERT_BEGIN           VERT_BIT_BEGIN
 123 #define VERT_END             VERT_BIT_END
 124 #define VERT_END_VB          VERT_BIT_END_VB
 125 #define VERT_POINT_SIZE      VERT_BIT_POINT_SIZE
 126 #define VERT_EYE             VERT_BIT_EYE
 127 #define VERT_CLIP            VERT_BIT_CLIP
 128
 129
 130 /* Flags for IM->TexCoordSize.  Enough flags for 16 units.
 131  */
 132 #define TEX_0_SIZE_3          (unsigned)0x1
 133 #define TEX_0_SIZE_4          (unsigned)0x10001
 134 #define TEX_SIZE_3(unit)      (TEX_0_SIZE_3 << (unit))
 135 #define TEX_SIZE_4(unit)      (TEX_0_SIZE_4 << (unit))
 136
 137
 138 /* Shorthands.
 139  */
 140 #define VERT_BITS_OBJ_23   (VERT_BIT_POS | VERT_BIT_OBJ_3)
 141 #define VERT_BITS_OBJ_234  (VERT_BIT_POS | VERT_BIT_OBJ_3 | VERT_BIT_OBJ_4)
 142
 143 #define VERT_BITS_TEX_ANY  (VERT_BIT_TEX0 |     \
 144                             VERT_BIT_TEX1 |     \
 145                             VERT_BIT_TEX2 |     \
 146                             VERT_BIT_TEX3 |     \
 147                             VERT_BIT_TEX4 |     \
 148                             VERT_BIT_TEX5 |     \
 149                             VERT_BIT_TEX6 |     \
 150                             VERT_BIT_TEX7)
 151
 152 #define VERT_BITS_EVAL_ANY (VERT_BIT_EVAL_C1 | VERT_BIT_EVAL_P1 | \
 153                             VERT_BIT_EVAL_C2 | VERT_BIT_EVAL_P2)
 154
 155 #define VERT_BITS_FIXUP    (VERT_BITS_TEX_ANY |         \
 156                             VERT_BIT_COLOR0 |           \
 157                             VERT_BIT_COLOR1 |           \
 158                             VERT_BIT_FOG |              \
 159                             VERT_BIT_INDEX |            \
 160                             VERT_BIT_EDGEFLAG |         \
 161                             VERT_BIT_NORMAL)
 162
 163 #define VERT_BITS_CURRENT_DATA  (VERT_BITS_FIXUP |      \
 164                                  VERT_BIT_MATERIAL)
 165
 166 #define VERT_BITS_DATA     (VERT_BITS_TEX_ANY |         \
 167                             VERT_BIT_COLOR0 |           \
 168                             VERT_BIT_COLOR1 |           \
 169                             VERT_BIT_FOG |              \
 170                             VERT_BIT_INDEX |            \
 171                             VERT_BIT_EDGEFLAG |         \
 172                             VERT_BIT_NORMAL |           \
 173                             VERT_BIT_POS |              \
 174                             VERT_BIT_MATERIAL |         \
 175                             VERT_BIT_ELT |              \
 176                             VERT_BITS_EVAL_ANY)
 177
 178
 179 /**
 180  * KW: Represents everything that can take place between a begin and
 181  * end, and can represent multiple begin/end pairs.  Can be used to
 182  * losslessly encode this information in display lists.
 183  */
 184 struct immediate
 185 {
 186    GLuint id, ref_count;
 187
 188    /* This must be saved when immediates are shared in display lists.
 189     */
 190    GLuint CopyStart, Start, Count;
 191    GLuint LastData;             /* count or count+1 */
 192    GLuint AndFlag, OrFlag;
 193    GLuint TexSize;              /* keep track of texcoord sizes */
 194    GLuint BeginState, SavedBeginState;
 195    GLuint LastPrimitive;
 196
 197    GLuint ArrayEltFlags;        /* precalc'ed for glArrayElt */
 198    GLuint ArrayEltIncr;
 199    GLuint ArrayEltFlush;
 200
 201 #define FLUSH_ELT_EAGER 0x1
 202 #define FLUSH_ELT_LAZY 0x2
 203    GLuint FlushElt;
 204
 205    GLuint MaxTextureUnits;      /* precalc'ed for glMultiTexCoordARB */
 206
 207    /* Temporary values created when vertices are copied into the
 208     * first 3 slots of the struct:
 209     */
 210    GLuint CopyOrFlag;
 211    GLuint CopyAndFlag;
 212    GLuint CopyTexSize;
 213    GLuint Evaluated;
 214
 215
 216    /* allocate storage for these on demand:
 217     */
 218    struct gl_material (*Material)[2];
 219    GLuint *MaterialMask;
 220    GLuint LastMaterial;
 221    GLuint MaterialOrMask;
 222    GLuint MaterialAndMask;
 223
 224    GLuint  Primitive[IMM_SIZE];       /* BEGIN/END */
 225    GLuint  PrimitiveLength[IMM_SIZE]; /* BEGIN/END */
 226    GLuint  Flag[IMM_SIZE];            /* VERT_BIT_* flags */
 227
 228    /* All vertex attributes (position, normal, color, secondary color,
 229     * texcoords, fog coord) are stored in the Attrib[] arrays instead
 230     * of individual arrays as we did prior to Mesa 4.1.
 231     *
 232     * XXX may need to use 32-byte aligned allocation for this!!!
 233     */
 234    GLfloat Attrib[VERT_ATTRIB_MAX][IMM_SIZE][4];  /* GL_NV_vertex_program */
 235
 236    GLfloat *NormalLengthPtr; /* length of normal vectors (display list only) */
 237
 238    GLuint  Elt[IMM_SIZE];
 239    GLubyte EdgeFlag[IMM_SIZE];
 240    GLuint  Index[IMM_SIZE];
 241 };
 242
 243
 244 struct vertex_arrays
 245 {
 246    GLvector4f  Obj;
 247    GLvector4f  Normal;
 248    struct gl_client_array Color;
 249    struct gl_client_array SecondaryColor;
 250    GLvector1ui Index;
 251    GLvector1ub EdgeFlag;
 252    GLvector4f  TexCoord[MAX_TEXTURE_UNITS];
 253    GLvector1ui Elt;
 254    GLvector4f  FogCoord;
 255    GLvector4f  Attribs[VERT_ATTRIB_MAX];
 256 };
 257
 258
 259 /**
 260  * Contains the current state of a running pipeline.
 261  */
 262 typedef struct vertex_buffer
 263 {
 264    /* Constant over life of the vertex_buffer.
 265     */
 266    GLuint Size;
 267
 268    /* Constant over the pipeline.
 269     */
 270    GLuint     Count;                          /* for everything except Elts */
 271    GLuint     FirstClipped;                   /* temp verts for clipping */
 272    GLuint     FirstPrimitive;                 /* usually zero */
 273
 274    /* Pointers to current data.
 275     */
 276    GLuint      *Elts;                           /* VERT_BIT_ELT */
 277    GLvector4f  *ObjPtr;                         /* VERT_BIT_POS */
 278    GLvector4f  *EyePtr;                         /* VERT_BIT_EYE */
 279    GLvector4f  *ClipPtr;                        /* VERT_BIT_CLIP */
 280    GLvector4f  *NdcPtr;                         /* VERT_BIT_CLIP (2) */
 281    GLubyte     ClipOrMask;                      /* VERT_BIT_CLIP (3) */
 282    GLubyte     *ClipMask;                       /* VERT_BIT_CLIP (4) */
 283    GLvector4f  *NormalPtr;                      /* VERT_BIT_NORMAL */
 284    GLfloat     *NormalLengthPtr;                /* VERT_BIT_NORMAL */
 285    GLboolean   *EdgeFlag;                       /* VERT_BIT_EDGEFLAG */
 286    GLvector4f  *TexCoordPtr[MAX_TEXTURE_UNITS]; /* VERT_TEX_0..n */
 287    GLvector1ui *IndexPtr[2];                    /* VERT_BIT_INDEX */
 288    struct gl_client_array *ColorPtr[2];         /* VERT_BIT_COLOR0 */
 289    struct gl_client_array *SecondaryColorPtr[2];/* VERT_BIT_COLOR1 */
 290    GLvector4f  *PointSizePtr;                   /* VERT_BIT_POINT_SIZE */
 291    GLvector4f  *FogCoordPtr;                    /* VERT_BIT_FOG */
 292    struct gl_material (*Material)[2];         /* VERT_BIT_MATERIAL, optional */
 293    GLuint      *MaterialMask;                 /* VERT_BIT_MATERIAL, optional */
 294    GLuint      *Flag;                         /* VERT_BIT_* flags, optional */
 295    GLuint      *Primitive;                    /* GL_(mode)|PRIM_* flags */
 296    GLuint      *PrimitiveLength;              /* integers */
 297
 298    /* Inputs to the vertex program stage */
 299    GLvector4f *AttribPtr[VERT_ATTRIB_MAX];      /* GL_NV_vertex_program */
 300
 301    GLuint importable_data;
 302    void *import_source;
 303    void (*import_data)( GLcontext *ctx, GLuint flags, GLuint vecflags );
 304    /* Callback to the provider of the untransformed input for the
 305     * render stage (or other stages) to call if they need to write into
 306     * write-protected arrays, or fixup the stride on input arrays.
 307     *
 308     * This is currently only necessary for client arrays that make it
 309     * as far down the pipeline as the render stage.
 310     */
 311
 312    GLuint LastClipped;
 313    /* Private data from _tnl_render_stage that has no business being
 314     * in this struct.
 315     */
 316
 317 } TNLvertexbuffer;
 318
 319
 320
 321 /* Describes an individual operation on the pipeline.
 322  */
 323 struct gl_pipeline_stage {
 324    const char *name;
 325    GLuint check_state;          /* All state referenced in check() --
 326                                  * When is the pipeline_stage struct
 327                                  * itself invalidated?  Must be
 328                                  * constant.
 329                                  */
 330
 331    /* Usually constant or set by the 'check' callback:
 332     */
 333    GLuint run_state;            /* All state referenced in run() --
 334                                  * When is the cached output of the
 335                                  * stage invalidated?
 336                                  */
 337
 338    GLboolean active;            /* True if runnable in current state */
 339    GLuint inputs;               /* VERT_* inputs to the stage */
 340    GLuint outputs;              /* VERT_* outputs of the stage */
 341
 342    /* Set in _tnl_run_pipeline():
 343     */
 344    GLuint changed_inputs;       /* Generated value -- inputs to the
 345                                  * stage that have changed since last
 346                                  * call to 'run'.
 347                                  */
 348
 349    /* Private data for the pipeline stage:
 350     */
 351    void *privatePtr;
 352
 353    /* Free private data.  May not be null.
 354     */
 355    void (*destroy)( struct gl_pipeline_stage * );
 356
 357    /* Called from _tnl_validate_pipeline().  Must update all fields in
 358     * the pipeline_stage struct for the current state.
 359     */
 360    void (*check)( GLcontext *ctx, struct gl_pipeline_stage * );
 361
 362    /* Called from _tnl_run_pipeline().  The stage.changed_inputs value
 363     * encodes all inputs to thee struct which have changed.  If
 364     * non-zero, recompute all affected outputs of the stage, otherwise
 365     * execute any 'sideeffects' of the stage.
 366     *
 367     * Return value: GL_TRUE - keep going
 368     *               GL_FALSE - finished pipeline
 369     */
 370    GLboolean (*run)( GLcontext *ctx, struct gl_pipeline_stage * );
 371 };
 372
 373
 374 struct gl_pipeline {
 375    GLuint build_state_trigger;    /* state changes which require build */
 376    GLuint build_state_changes;    /* state changes since last build */
 377    GLuint run_state_changes;      /* state changes since last run */
 378    GLuint run_input_changes;      /* VERT_* changes since last run */
 379    GLuint inputs;                 /* VERT_* inputs to pipeline */
 380    struct gl_pipeline_stage stages[MAX_PIPELINE_STAGES+1];
 381    GLuint nr_stages;
 382 };
 383
 384
 385 struct tnl_eval_store {
 386    GLuint EvalMap1Flags;
 387    GLuint EvalMap2Flags;
 388    GLuint EvalNewState;
 389    struct immediate *im;        /* used for temporary data */
 390 };
 391
 392
 393 typedef void (*points_func)( GLcontext *ctx, GLuint first, GLuint last );
 394 typedef void (*line_func)( GLcontext *ctx, GLuint v1, GLuint v2 );
 395 typedef void (*triangle_func)( GLcontext *ctx,
 396                                GLuint v1, GLuint v2, GLuint v3 );
 397 typedef void (*quad_func)( GLcontext *ctx, GLuint v1, GLuint v2,
 398                            GLuint v3, GLuint v4 );
 399 typedef void (*render_func)( GLcontext *ctx, GLuint start, GLuint count,
 400                              GLuint flags );
 401 typedef void (*interp_func)( GLcontext *ctx,
 402                              GLfloat t, GLuint dst, GLuint out, GLuint in,
 403                              GLboolean force_boundary );
 404 typedef void (*copy_pv_func)( GLcontext *ctx, GLuint dst, GLuint src );
 405 typedef void (*setup_func)( GLcontext *ctx,
 406                             GLuint start, GLuint end,
 407                             GLuint new_inputs);
 408
 409
 410 struct tnl_device_driver {
 411    /***
 412     *** TNL Pipeline
 413     ***/
 414
 415    void (*RunPipeline)(GLcontext *ctx);
 416    /* Replaces PipelineStart/PipelineFinish -- intended to allow
 417     * drivers to wrap _tnl_run_pipeline() with code to validate state
 418     * and grab/release hardware locks.
 419     */
 420
 421    void (*NotifyMaterialChange)(GLcontext *ctx);
 422    /* Alert tnl-aware drivers of changes to material.
 423     */
 424
 425    GLboolean (*NotifyBegin)(GLcontext *ctx, GLenum p);
 426    /* Allow drivers to hook in optimized begin/end engines.
 427     * Return value:  GL_TRUE - driver handled the begin
 428     *                GL_FALSE - driver didn't handle the begin
 429     */
 430
 431    /***
 432     *** Rendering -- These functions called only from t_vb_render.c
 433     ***/
 434    struct {
 435       void (*Start)(GLcontext *ctx);
 436       void (*Finish)(GLcontext *ctx);
 437       /* Called before and after all rendering operations, including DrawPixels,
 438        * ReadPixels, Bitmap, span functions, and CopyTexImage, etc commands.
 439        * These are a suitable place for grabbing/releasing hardware locks.
 440        */
 441
 442       void (*PrimitiveNotify)(GLcontext *ctx, GLenum mode);
 443       /* Called between RenderStart() and RenderFinish() to indicate the
 444        * type of primitive we're about to draw.  Mode will be one of the
 445        * modes accepted by glBegin().
 446        */
 447
 448       interp_func Interp;
 449       /* The interp function is called by the clipping routines when we need
 450        * to generate an interpolated vertex.  All pertinant vertex ancilliary
 451        * data should be computed by interpolating between the 'in' and 'out'
 452        * vertices.
 453        */
 454
 455       copy_pv_func CopyPV;
 456       /* The copy function is used to make a copy of a vertex.  All pertinant
 457        * vertex attributes should be copied.
 458        */
 459
 460       void (*ClippedPolygon)( GLcontext *ctx, const GLuint *elts, GLuint n );
 461       /* Render a polygon with <n> vertices whose indexes are in the <elts>
 462        * array.
 463        */
 464
 465       void (*ClippedLine)( GLcontext *ctx, GLuint v0, GLuint v1 );
 466       /* Render a line between the two vertices given by indexes v0 and v1. */
 467
 468       points_func           Points; /* must now respect vb->elts */
 469       line_func             Line;
 470       triangle_func         Triangle;
 471       quad_func             Quad;
 472       /* These functions are called in order to render points, lines,
 473        * triangles and quads.  These are only called via the T&L module.
 474        */
 475
 476       render_func          *PrimTabVerts;
 477       render_func          *PrimTabElts;
 478       /* Render whole unclipped primitives (points, lines, linestrips,
 479        * lineloops, etc).  The tables are indexed by the GL enum of the
 480        * primitive to be rendered.  RenderTabVerts is used for non-indexed
 481        * arrays of vertices.  RenderTabElts is used for indexed arrays of
 482        * vertices.
 483        */
 484
 485       void (*ResetLineStipple)( GLcontext *ctx );
 486       /* Reset the hardware's line stipple counter.
 487        */
 488
 489       setup_func BuildVertices;
 490       /* This function is called whenever new vertices are required for
 491        * rendering.  The vertices in question are those n such that start
 492        * <= n < end.  The new_inputs parameter indicates those fields of
 493        * the vertex which need to be updated, if only a partial repair of
 494        * the vertex is required.
 495        *
 496        * This function is called only from _tnl_render_stage in tnl/t_render.c.
 497        */
 498
 499
 500       GLboolean (*Multipass)( GLcontext *ctx, GLuint passno );
 501       /* Driver may request additional render passes by returning GL_TRUE
 502        * when this function is called.  This function will be called
 503        * after the first pass, and passes will be made until the function
 504        * returns GL_FALSE.  If no function is registered, only one pass
 505        * is made.
 506        *
 507        * This function will be first invoked with passno == 1.
 508        */
 509    } Render;
 510 };
 511
 512
 513 typedef struct {
 514
 515    /* Driver interface.
 516     */
 517    struct tnl_device_driver Driver;
 518
 519    /* Track whether the module is active.
 520     */
 521    GLboolean bound_exec;
 522
 523    /* Display list extensions
 524     */
 525    GLuint opcode_vertex_cassette;
 526
 527    /* Pipeline
 528     */
 529    struct gl_pipeline pipeline;
 530    struct vertex_buffer vb;
 531
 532    /* GLvectors for binding to vb:
 533     */
 534    struct vertex_arrays imm_inputs;
 535    struct vertex_arrays array_inputs;
 536    GLuint *tmp_primitive;
 537    GLuint *tmp_primitive_length;
 538
 539    /* Set when executing an internally generated begin/end object.  If
 540     * such an object is encountered in a display list, it will be
 541     * replayed only if the list is outside any existing begin/end
 542     * objects.
 543     */
 544    GLboolean ReplayHardBeginEnd;
 545
 546    /* Note which vertices need copying over succesive immediates.
 547     * Will add save versions to precompute vertex copying where
 548     * possible.
 549     */
 550    struct immediate *ExecCopySource;
 551    GLuint ExecCopyCount;
 552    GLuint ExecCopyElts[IMM_MAX_COPIED_VERTS];
 553    GLuint ExecCopyTexSize;
 554    GLuint ExecParity;
 555
 556    GLuint DlistPrimitive;
 557    GLuint DlistPrimitiveLength;
 558    GLuint DlistLastPrimitive;
 559
 560    /* Cache a single free immediate (refcount == 0)
 561     */
 562    struct immediate *freed_immediate;
 563
 564    /* Probably need a better configuration mechanism:
 565     */
 566    GLboolean NeedNdcCoords;
 567    GLboolean LoopbackDListCassettes;
 568    GLboolean CalcDListNormalLengths;
 569    GLboolean IsolateMaterials;
 570
 571    /* Derived state and storage for _tnl_eval_vb:
 572     */
 573    struct tnl_eval_store eval;
 574
 575    /* Functions to be plugged into dispatch when tnl is active.
 576     */
 577    GLvertexformat vtxfmt;
 578    GLvertexformat save_vtxfmt;
 579
 580 } TNLcontext;
 581
 582
 583
 584 #define TNL_CONTEXT(ctx) ((TNLcontext *)(ctx->swtnl_context))
 585 #define TNL_CURRENT_IM(ctx) ((struct immediate *)(ctx->swtnl_im))
 586
 587
 588 #define TYPE_IDX(t) ((t) & 0xf)
 589 #define MAX_TYPES TYPE_IDX(GL_DOUBLE)+1      /* 0xa + 1 */
 590
 591 extern void _tnl_MakeCurrent( GLcontext *ctx,
 592                               GLframebuffer *drawBuffer,
 593                               GLframebuffer *readBuffer );
 594
 595
 596 /*
 597  * Macros for fetching current input buffer.
 598  */
 599 #ifdef THREADS
 600 #define GET_IMMEDIATE  struct immediate *IM = TNL_CURRENT_IM(((GLcontext *) (_glapi_Context ? _glapi_Context : _glapi_get_context())))
 601 #define SET_IMMEDIATE(ctx, im)  ctx->swtnl_im = (void *)im
 602 #else
 603 extern struct immediate *_tnl_CurrentInput;
 604 #define GET_IMMEDIATE struct immediate *IM = _tnl_CurrentInput
 605 #define SET_IMMEDIATE(ctx, im)                  \
 606 do {                                            \
 607    ctx->swtnl_im = (void *)im;                  \
 608    _tnl_CurrentInput = im;                      \
 609 } while (0)
 610 #endif
 611
 612
 613 #endif