src/mesa/tnl/t_context.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  5.1
   4  *
   5  * Copyright (C) 1999-2003  Brian Paul   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 shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file t_context.h
  27  * \brief TnL module datatypes and definitions.
  28  * \author Keith Whitwell
  29  */
  30
  31
  32 /**
  33  * \mainpage The TNL-module
  34  *
  35  * TNL stands for "transform and lighting", i.e. this module implements
  36  * a pipeline that receives as input a buffer of vertices and does all
  37  * necessary transformations (rotations, clipping, vertex shader etc.)
  38  * and passes then the output to the rasterizer.
  39  *
  40  * The gl_pipeline contains the array of all stages, which should be
  41  * applied. Each stage is a black-box, which is described by an
  42  * gl_pipeline_stage. The function ::_tnl_run_pipeline applies all the
  43  * stages to the vertex_buffer TNLcontext::vb, where the vertex data
  44  * is stored. The last stage in the pipeline is the rasterizer.
  45  *
  46  * The initial vertex_buffer data may either come from an ::immediate
  47  * structure or client vertex_arrays or display lists:
  48  *
  49  *
  50  * - The ::immediate structure records all the GL commands issued between
  51  * glBegin and glEnd.  \n
  52  * The structure accumulates data, until it is either full or it is
  53  * flushed (usually by a state change). Before starting then the pipeline,
  54  * the collected vertex data in ::immediate has to be pushed into
  55  * TNLcontext::vb.
  56  * This happens in ::_tnl_vb_bind_immediate. The pipeline is then run by
  57  * calling tnl_device_driver::RunPipeline = ::_tnl_run_pipeline, which
  58  * is stored in TNLcontext::Driver.   \n
  59  * An ::immediate does (for performance reasons) usually not finish with a
  60  * glEnd, and hence it also does not need to start with a glBegin.
  61  * This means that the last vertices of one ::immediate may need to be
  62  * saved for the next one.
  63  *
  64  *
  65  * - NOT SURE ABOUT THIS: The vertex_arrays structure is used to handle
  66  * glDrawArrays etc.  \n
  67  * Here, the data of the vertex_arrays is copied by ::_tnl_vb_bind_arrays
  68  * into TNLcontext::vb, so that the pipeline can be started.
  69  */
  70
  71 /* What is ELT? */
  72
  73 #ifndef _T_CONTEXT_H
  74 #define _T_CONTEXT_H
  75
  76 #include "glheader.h"
  77 #include "mtypes.h"
  78
  79 #include "math/m_matrix.h"
  80 #include "math/m_vector.h"
  81 #include "math/m_xform.h"
  82
  83
  84 #define MAX_PIPELINE_STAGES     30
  85
  86
  87 /* Numbers for sizing immediate structs.
  88  */
  89 #define IMM_MAX_COPIED_VERTS  3
  90 #define IMM_MAXDATA          (216 + IMM_MAX_COPIED_VERTS)
  91 #define IMM_SIZE             (IMM_MAXDATA + MAX_CLIPPED_VERTICES)
  92
  93
  94 /* Values for IM->BeginState
  95  */
  96 #define VERT_BEGIN_0    0x1        /* glBegin (if initially inside beg/end) */
  97 #define VERT_BEGIN_1    0x2        /* glBegin (if initially outside beg/end) */
  98 #define VERT_ERROR_0    0x4        /* invalid_operation in initial state 0 */
  99 #define VERT_ERROR_1    0x8        /* invalid_operation in initial state 1 */
 100
 101
 102 /* Flags to be added to the primitive enum in VB->Primitive.
 103  */
 104 #define PRIM_MODE_MASK  0xff   /* Extract the actual primitive */
 105 #define PRIM_BEGIN      0x100  /* The prim starts here (not wrapped) */
 106 #define PRIM_END        0x200  /* The prim ends in this VB (does not wrap) */
 107 #define PRIM_PARITY     0x400  /* The prim wrapped on an odd number of verts */
 108 #define PRIM_LAST       0x800  /* No more prims in the VB */
 109
 110
 111 /**
 112  * Flags that describe the inputs and outputs of pipeline stages, and
 113  * the contents of a vertex-cassette.  We reuse the VERT_BIT_* flags
 114  * defined in mtypes.h and add a bunch of new ones.
 115  */
 116 /* bits 0..5 defined in mtypes.h */
 117 #define VERT_BIT_INDEX       VERT_BIT_SIX    /* a free vertex attrib bit */
 118 #define VERT_BIT_EDGEFLAG    VERT_BIT_SEVEN  /* a free vertex attrib bit */
 119 /* bits 8..15 defined in mtypes.h */
 120 #define VERT_BIT_EVAL_C1     (1 << 16)  /* imm only */
 121 #define VERT_BIT_EVAL_C2     (1 << 17)  /* imm only */
 122 #define VERT_BIT_EVAL_P1     (1 << 18)  /* imm only */
 123 #define VERT_BIT_EVAL_P2     (1 << 19)  /* imm only */
 124 #define VERT_BIT_OBJ_3       (1 << 20)  /* imm only */
 125 #define VERT_BIT_OBJ_4       (1 << 21)  /* imm only */
 126 #define VERT_BIT_MATERIAL    (1 << 22)  /* imm only, but tested in vb code */
 127 #define VERT_BIT_ELT         (1 << 23)  /* imm only */
 128 #define VERT_BIT_BEGIN       (1 << 24)  /* imm only, but tested in vb code */
 129 #define VERT_BIT_END         (1 << 25)  /* imm only, but tested in vb code */
 130 #define VERT_BIT_END_VB      (1 << 26)  /* imm only, but tested in vb code */
 131 #define VERT_BIT_POINT_SIZE  (1 << 27)  /* vb only, could reuse a bit */
 132 #define VERT_BIT_EYE         VERT_BIT_BEGIN /* vb only, reuse imm bit */
 133 #define VERT_BIT_CLIP        VERT_BIT_END   /* vb only, reuse imm bit*/
 134
 135
 136 /* Flags for IM->TexCoordSize.  Enough flags for 16 units.
 137  */
 138 #define TEX_0_SIZE_3          (unsigned)0x1
 139 #define TEX_0_SIZE_4          (unsigned)0x10001
 140 #define TEX_SIZE_3(unit)      (TEX_0_SIZE_3 << (unit))
 141 #define TEX_SIZE_4(unit)      (TEX_0_SIZE_4 << (unit))
 142
 143
 144 /* Shorthands.
 145  */
 146 #define VERT_BITS_OBJ_23   (VERT_BIT_POS | VERT_BIT_OBJ_3)
 147 #define VERT_BITS_OBJ_234  (VERT_BIT_POS | VERT_BIT_OBJ_3 | VERT_BIT_OBJ_4)
 148
 149 #define VERT_BITS_TEX_ANY  (VERT_BIT_TEX0 |     \
 150                             VERT_BIT_TEX1 |     \
 151                             VERT_BIT_TEX2 |     \
 152                             VERT_BIT_TEX3 |     \
 153                             VERT_BIT_TEX4 |     \
 154                             VERT_BIT_TEX5 |     \
 155                             VERT_BIT_TEX6 |     \
 156                             VERT_BIT_TEX7)
 157
 158 #define VERT_BITS_EVAL_ANY (VERT_BIT_EVAL_C1 | VERT_BIT_EVAL_P1 | \
 159                             VERT_BIT_EVAL_C2 | VERT_BIT_EVAL_P2)
 160
 161 #define VERT_BITS_FIXUP    (VERT_BITS_TEX_ANY |         \
 162                             VERT_BIT_COLOR0 |           \
 163                             VERT_BIT_COLOR1 |           \
 164                             VERT_BIT_FOG |              \
 165                             VERT_BIT_INDEX |            \
 166                             VERT_BIT_EDGEFLAG |         \
 167                             VERT_BIT_NORMAL)
 168
 169 #define VERT_BITS_CURRENT_DATA  (VERT_BITS_FIXUP |      \
 170                                  VERT_BIT_MATERIAL)
 171
 172 #define VERT_BITS_DATA     (VERT_BITS_TEX_ANY |         \
 173                             VERT_BIT_COLOR0 |           \
 174                             VERT_BIT_COLOR1 |           \
 175                             VERT_BIT_FOG |              \
 176                             VERT_BIT_INDEX |            \
 177                             VERT_BIT_EDGEFLAG |         \
 178                             VERT_BIT_NORMAL |           \
 179                             VERT_BIT_POS |              \
 180                             VERT_BIT_MATERIAL |         \
 181                             VERT_BIT_ELT |              \
 182                             VERT_BITS_EVAL_ANY)
 183
 184
 185 /**
 186  * \struct immediate
 187  * Stores everything that can take place between a glBegin and glEnd.
 188  * Adjacent glBegin/glEnd pairs are stored back-to-back when there's no
 189  * state changes between them.
 190  * Used for immediate mode rendering and display lists.
 191  */
 192 struct immediate
 193 {
 194    GLuint id, ref_count;
 195
 196    /* This must be saved when immediates are shared in display lists.
 197     */
 198    GLuint CopyStart, Start, Count;
 199    GLuint LastData;             /* count or count+1 */
 200    GLuint AndFlag, OrFlag;
 201    GLuint TexSize;              /* keep track of texcoord sizes */
 202    GLuint BeginState, SavedBeginState;
 203    GLuint LastPrimitive;
 204
 205    GLuint ArrayEltFlags;        /* precalc'ed for glArrayElt */
 206    GLuint ArrayEltIncr;
 207    GLuint ArrayEltFlush;
 208
 209 #define FLUSH_ELT_EAGER 0x1
 210 #define FLUSH_ELT_LAZY 0x2
 211    GLuint FlushElt;
 212
 213    GLuint MaxTextureUnits;      /* precalc'ed for glMultiTexCoordARB */
 214
 215    /* Temporary values created when vertices are copied into the
 216     * first 3 slots of the struct:
 217     */
 218    GLuint CopyOrFlag;
 219    GLuint CopyAndFlag;
 220    GLuint CopyTexSize;
 221    GLuint Evaluated;
 222
 223
 224    /* allocate storage for these on demand:
 225     */
 226    struct gl_material *Material;
 227    GLuint *MaterialMask;
 228    GLuint LastMaterial;
 229    GLuint MaterialOrMask;
 230    GLuint MaterialAndMask;
 231
 232    GLuint  Primitive[IMM_SIZE];       /* BEGIN/END */
 233    GLuint  PrimitiveLength[IMM_SIZE]; /* BEGIN/END */
 234    GLuint  Flag[IMM_SIZE];            /* VERT_BIT_* flags */
 235
 236    /* Attrib is an array [MAX_VERT_ATTRIBS] of pointer to array [][4]
 237     * of GLfloat.
 238     * We only pre-allocate the vertex position array.  The other vertex
 239     * attribute arrays are only allocated when needed to save memory.
 240     */
 241    GLfloat (*Attrib[VERT_ATTRIB_MAX])[4];
 242
 243    GLfloat *NormalLengthPtr; /* length of normal vectors (display list only) */
 244
 245    GLuint  Elt[IMM_SIZE];
 246    GLubyte EdgeFlag[IMM_SIZE];
 247    GLuint  Index[IMM_SIZE];
 248 };
 249
 250
 251 struct vertex_arrays
 252 {
 253    /* Conventional vertex attribute arrays */
 254    GLvector4f  Obj;
 255    GLvector4f  Normal;
 256    struct gl_client_array Color;
 257    struct gl_client_array SecondaryColor;
 258    GLvector4f  FogCoord;
 259    GLvector4f  TexCoord[MAX_TEXTURE_COORD_UNITS];
 260    GLvector1ub EdgeFlag;
 261    GLvector1ui Index;
 262    GLvector1ui Elt;
 263
 264    /* These attributes don't alias with the conventional attributes.
 265     * The GL_NV_vertex_program extension defines 16 extra sets of vertex
 266     * arrays which have precedent over the conventional arrays when enabled.
 267     */
 268    GLvector4f  Attribs[VERT_ATTRIB_MAX];
 269 };
 270
 271
 272 /**
 273  * Contains the current state of a running pipeline.
 274  */
 275 typedef struct vertex_buffer
 276 {
 277    /* Constant over life of the vertex_buffer.
 278     */
 279    GLuint Size;
 280
 281    /* Constant over the pipeline.
 282     */
 283    GLuint     Count;                          /* for everything except Elts */
 284    GLuint     FirstClipped;                   /* temp verts for clipping */
 285    GLuint     FirstPrimitive;                 /* usually zero */
 286
 287    /* Pointers to current data.
 288     */
 289    GLuint      *Elts;                           /* VERT_BIT_ELT */
 290    GLvector4f  *ObjPtr;                         /* VERT_BIT_POS */
 291    GLvector4f  *EyePtr;                         /* VERT_BIT_EYE */
 292    GLvector4f  *ClipPtr;                        /* VERT_BIT_CLIP */
 293    GLvector4f  *NdcPtr;                         /* VERT_BIT_CLIP (2) */
 294    GLubyte     ClipOrMask;                      /* VERT_BIT_CLIP (3) */
 295    GLubyte     *ClipMask;                       /* VERT_BIT_CLIP (4) */
 296    GLvector4f  *NormalPtr;                      /* VERT_BIT_NORMAL */
 297    GLfloat     *NormalLengthPtr;                /* VERT_BIT_NORMAL */
 298    GLboolean   *EdgeFlag;                       /* VERT_BIT_EDGEFLAG */
 299    GLvector4f  *TexCoordPtr[MAX_TEXTURE_COORD_UNITS]; /* VERT_TEX_0..n */
 300    GLvector1ui *IndexPtr[2];                    /* VERT_BIT_INDEX */
 301    struct gl_client_array *ColorPtr[2];         /* VERT_BIT_COLOR0 */
 302    struct gl_client_array *SecondaryColorPtr[2];/* VERT_BIT_COLOR1 */
 303    GLvector4f  *PointSizePtr;                   /* VERT_BIT_POINT_SIZE */
 304    GLvector4f  *FogCoordPtr;                    /* VERT_BIT_FOG */
 305    struct gl_material *Material;              /* VERT_BIT_MATERIAL, optional */
 306    GLuint      *MaterialMask;                 /* VERT_BIT_MATERIAL, optional */
 307    GLuint      *Flag;                         /* VERT_BIT_* flags, optional */
 308    GLuint      *Primitive;                    /* GL_(mode)|PRIM_* flags */
 309    GLuint      *PrimitiveLength;              /* integers */
 310
 311    /* Inputs to the vertex program stage */
 312    GLvector4f *AttribPtr[VERT_ATTRIB_MAX];      /* GL_NV_vertex_program */
 313
 314    GLuint importable_data;
 315    void *import_source;
 316    void (*import_data)( GLcontext *ctx, GLuint flags, GLuint vecflags );
 317    /* Callback to the provider of the untransformed input for the
 318     * render stage (or other stages) to call if they need to write into
 319     * write-protected arrays, or fixup the stride on input arrays.
 320     *
 321     * This is currently only necessary for client arrays that make it
 322     * as far down the pipeline as the render stage.
 323     */
 324
 325    GLuint LastClipped;
 326    /* Private data from _tnl_render_stage that has no business being
 327     * in this struct.
 328     */
 329
 330 } TNLvertexbuffer;
 331
 332
 333
 334 /** Describes an individual operation on the pipeline.
 335  */
 336 struct gl_pipeline_stage {
 337    const char *name;
 338    GLuint check_state;          /* All state referenced in check() --
 339                                  * When is the pipeline_stage struct
 340                                  * itself invalidated?  Must be
 341                                  * constant.
 342                                  */
 343
 344    /* Usually constant or set by the 'check' callback:
 345     */
 346    GLuint run_state;            /* All state referenced in run() --
 347                                  * When is the cached output of the
 348                                  * stage invalidated?
 349                                  */
 350
 351    GLboolean active;            /* True if runnable in current state */
 352    GLuint inputs;               /* VERT_* inputs to the stage */
 353    GLuint outputs;              /* VERT_* outputs of the stage */
 354
 355    /* Set in _tnl_run_pipeline():
 356     */
 357    GLuint changed_inputs;       /* Generated value -- inputs to the
 358                                  * stage that have changed since last
 359                                  * call to 'run'.
 360                                  */
 361
 362    /* Private data for the pipeline stage:
 363     */
 364    void *privatePtr;
 365
 366    /* Free private data.  May not be null.
 367     */
 368    void (*destroy)( struct gl_pipeline_stage * );
 369
 370    /* Called from _tnl_validate_pipeline().  Must update all fields in
 371     * the pipeline_stage struct for the current state.
 372     */
 373    void (*check)( GLcontext *ctx, struct gl_pipeline_stage * );
 374
 375    /* Called from _tnl_run_pipeline().  The stage.changed_inputs value
 376     * encodes all inputs to thee struct which have changed.  If
 377     * non-zero, recompute all affected outputs of the stage, otherwise
 378     * execute any 'sideeffects' of the stage.
 379     *
 380     * Return value: GL_TRUE - keep going
 381     *               GL_FALSE - finished pipeline
 382     */
 383    GLboolean (*run)( GLcontext *ctx, struct gl_pipeline_stage * );
 384 };
 385
 386 /** Contains the array of all pipeline stages.
 387  * The default values are defined at the end of t_pipeline.c */
 388 struct gl_pipeline {
 389    GLuint build_state_trigger;    /**< state changes which require build */
 390    GLuint build_state_changes;    /**< state changes since last build */
 391    GLuint run_state_changes;      /**< state changes since last run */
 392    GLuint run_input_changes;      /**< VERT_* changes since last run */
 393    GLuint inputs;                 /**< VERT_* inputs to pipeline */
 394    /** This array has to end with a NULL-pointer. */
 395    struct gl_pipeline_stage stages[MAX_PIPELINE_STAGES+1];
 396    GLuint nr_stages;
 397 };
 398
 399
 400 struct tnl_eval_store {
 401    GLuint EvalMap1Flags;
 402    GLuint EvalMap2Flags;
 403    GLuint EvalMap1AttribFlags;  /* GL_NV_vertex_program */
 404    GLuint EvalMap2AttribFlags;  /* GL_NV_vertex_program */
 405    GLuint EvalNewState;
 406    struct immediate *im;        /* used for temporary data */
 407 };
 408
 409
 410 typedef void (*points_func)( GLcontext *ctx, GLuint first, GLuint last );
 411 typedef void (*line_func)( GLcontext *ctx, GLuint v1, GLuint v2 );
 412 typedef void (*triangle_func)( GLcontext *ctx,
 413                                GLuint v1, GLuint v2, GLuint v3 );
 414 typedef void (*quad_func)( GLcontext *ctx, GLuint v1, GLuint v2,
 415                            GLuint v3, GLuint v4 );
 416 typedef void (*render_func)( GLcontext *ctx, GLuint start, GLuint count,
 417                              GLuint flags );
 418 typedef void (*interp_func)( GLcontext *ctx,
 419                              GLfloat t, GLuint dst, GLuint out, GLuint in,
 420                              GLboolean force_boundary );
 421 typedef void (*copy_pv_func)( GLcontext *ctx, GLuint dst, GLuint src );
 422 typedef void (*setup_func)( GLcontext *ctx,
 423                             GLuint start, GLuint end,
 424                             GLuint new_inputs);
 425
 426
 427 struct tnl_device_driver {
 428    /***
 429     *** TNL Pipeline
 430     ***/
 431
 432    void (*RunPipeline)(GLcontext *ctx);
 433    /* Replaces PipelineStart/PipelineFinish -- intended to allow
 434     * drivers to wrap _tnl_run_pipeline() with code to validate state
 435     * and grab/release hardware locks.
 436     */
 437
 438    void (*NotifyMaterialChange)(GLcontext *ctx);
 439    /* Alert tnl-aware drivers of changes to material.
 440     */
 441
 442    GLboolean (*NotifyBegin)(GLcontext *ctx, GLenum p);
 443    /* Allow drivers to hook in optimized begin/end engines.
 444     * Return value:  GL_TRUE - driver handled the begin
 445     *                GL_FALSE - driver didn't handle the begin
 446     */
 447
 448    /***
 449     *** Rendering -- These functions called only from t_vb_render.c
 450     ***/
 451    struct {
 452       void (*Start)(GLcontext *ctx);
 453       void (*Finish)(GLcontext *ctx);
 454       /* Called before and after all rendering operations, including DrawPixels,
 455        * ReadPixels, Bitmap, span functions, and CopyTexImage, etc commands.
 456        * These are a suitable place for grabbing/releasing hardware locks.
 457        */
 458
 459       void (*PrimitiveNotify)(GLcontext *ctx, GLenum mode);
 460       /* Called between RenderStart() and RenderFinish() to indicate the
 461        * type of primitive we're about to draw.  Mode will be one of the
 462        * modes accepted by glBegin().
 463        */
 464
 465       interp_func Interp;
 466       /* The interp function is called by the clipping routines when we need
 467        * to generate an interpolated vertex.  All pertinant vertex ancilliary
 468        * data should be computed by interpolating between the 'in' and 'out'
 469        * vertices.
 470        */
 471
 472       copy_pv_func CopyPV;
 473       /* The copy function is used to make a copy of a vertex.  All pertinant
 474        * vertex attributes should be copied.
 475        */
 476
 477       void (*ClippedPolygon)( GLcontext *ctx, const GLuint *elts, GLuint n );
 478       /* Render a polygon with <n> vertices whose indexes are in the <elts>
 479        * array.
 480        */
 481
 482       void (*ClippedLine)( GLcontext *ctx, GLuint v0, GLuint v1 );
 483       /* Render a line between the two vertices given by indexes v0 and v1. */
 484
 485       points_func           Points; /* must now respect vb->elts */
 486       line_func             Line;
 487       triangle_func         Triangle;
 488       quad_func             Quad;
 489       /* These functions are called in order to render points, lines,
 490        * triangles and quads.  These are only called via the T&L module.
 491        */
 492
 493       render_func          *PrimTabVerts;
 494       render_func          *PrimTabElts;
 495       /* Render whole unclipped primitives (points, lines, linestrips,
 496        * lineloops, etc).  The tables are indexed by the GL enum of the
 497        * primitive to be rendered.  RenderTabVerts is used for non-indexed
 498        * arrays of vertices.  RenderTabElts is used for indexed arrays of
 499        * vertices.
 500        */
 501
 502       void (*ResetLineStipple)( GLcontext *ctx );
 503       /* Reset the hardware's line stipple counter.
 504        */
 505
 506       setup_func BuildVertices;
 507       /* This function is called whenever new vertices are required for
 508        * rendering.  The vertices in question are those n such that start
 509        * <= n < end.  The new_inputs parameter indicates those fields of
 510        * the vertex which need to be updated, if only a partial repair of
 511        * the vertex is required.
 512        *
 513        * This function is called only from _tnl_render_stage in tnl/t_render.c.
 514        */
 515
 516
 517       GLboolean (*Multipass)( GLcontext *ctx, GLuint passno );
 518       /* Driver may request additional render passes by returning GL_TRUE
 519        * when this function is called.  This function will be called
 520        * after the first pass, and passes will be made until the function
 521        * returns GL_FALSE.  If no function is registered, only one pass
 522        * is made.
 523        *
 524        * This function will be first invoked with passno == 1.
 525        */
 526    } Render;
 527 };
 528
 529
 530 typedef struct {
 531
 532    /* Driver interface.
 533     */
 534    struct tnl_device_driver Driver;
 535
 536    /* Track whether the module is active.
 537     */
 538    GLboolean bound_exec;
 539
 540    /* Display list extensions
 541     */
 542    GLuint opcode_vertex_cassette;
 543
 544    /* Pipeline
 545     */
 546    struct gl_pipeline pipeline;
 547    struct vertex_buffer vb;
 548
 549    /* GLvectors for binding to vb:
 550     */
 551    struct vertex_arrays imm_inputs;
 552    struct vertex_arrays array_inputs;
 553    GLuint *tmp_primitive;
 554    GLuint *tmp_primitive_length;
 555
 556    /* Set when executing an internally generated begin/end object.  If
 557     * such an object is encountered in a display list, it will be
 558     * replayed only if the list is outside any existing begin/end
 559     * objects.
 560     */
 561    GLboolean ReplayHardBeginEnd;
 562
 563    /* Note which vertices need copying over succesive immediates.
 564     * Will add save versions to precompute vertex copying where
 565     * possible.
 566     */
 567    struct immediate *ExecCopySource;
 568    GLuint ExecCopyCount;
 569    GLuint ExecCopyElts[IMM_MAX_COPIED_VERTS];
 570    GLuint ExecCopyTexSize;
 571    GLuint ExecParity;
 572
 573    GLuint DlistPrimitive;
 574    GLuint DlistPrimitiveLength;
 575    GLuint DlistLastPrimitive;
 576
 577    /* Cache a single free immediate (refcount == 0)
 578     */
 579    struct immediate *freed_immediate;
 580
 581    /* Probably need a better configuration mechanism:
 582     */
 583    GLboolean NeedNdcCoords;
 584    GLboolean LoopbackDListCassettes;
 585    GLboolean CalcDListNormalLengths;
 586    GLboolean IsolateMaterials;
 587
 588    /* Derived state and storage for _tnl_eval_vb:
 589     */
 590    struct tnl_eval_store eval;
 591
 592    /* Functions to be plugged into dispatch when tnl is active.
 593     */
 594    GLvertexformat vtxfmt;
 595    GLvertexformat save_vtxfmt;
 596
 597 } TNLcontext;
 598
 599
 600
 601 #define TNL_CONTEXT(ctx) ((TNLcontext *)(ctx->swtnl_context))
 602 #define TNL_CURRENT_IM(ctx) ((struct immediate *)(ctx->swtnl_im))
 603
 604
 605 #define TYPE_IDX(t) ((t) & 0xf)
 606 #define MAX_TYPES TYPE_IDX(GL_DOUBLE)+1      /* 0xa + 1 */
 607
 608 extern void _tnl_MakeCurrent( GLcontext *ctx,
 609                               GLframebuffer *drawBuffer,
 610                               GLframebuffer *readBuffer );
 611
 612
 613 /*
 614  * Macros for fetching current input buffer.
 615  */
 616 #ifdef THREADS
 617 #define GET_IMMEDIATE  struct immediate *IM = TNL_CURRENT_IM(((GLcontext *) (_glapi_Context ? _glapi_Context : _glapi_get_context())))
 618 #define SET_IMMEDIATE(ctx, im)  ctx->swtnl_im = (void *)im
 619 #else
 620 extern struct immediate *_tnl_CurrentInput;
 621 #define GET_IMMEDIATE struct immediate *IM = _tnl_CurrentInput
 622 #define SET_IMMEDIATE(ctx, im)                  \
 623 do {                                            \
 624    ctx->swtnl_im = (void *)im;                  \
 625    _tnl_CurrentInput = im;                      \
 626 } while (0)
 627 #endif
 628
 629
 630 #endif