src/mesa/main/mtypes.h

   1 /**
   2  * \file mtypes.h
   3  * Main Mesa data structures.
   4  *
   5  * Please try to mark derived values with a leading underscore ('_').
   6  */
   7
   8 /*
   9  * Mesa 3-D graphics library
  10  * Version:  6.5.3
  11  *
  12  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the "Software"),
  16  * to deal in the Software without restriction, including without limitation
  17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  18  * and/or sell copies of the Software, and to permit persons to whom the
  19  * Software is furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice shall be included
  22  * in all copies or substantial portions of the Software.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  25  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  27  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  28  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30  */
  31
  32
  33
  34 #ifndef TYPES_H
  35 #define TYPES_H
  36
  37
  38 #include "glheader.h"
  39 #include <GL/internal/glcore.h> /* GLimports/GLexports/GLcontextModes */
  40 #include "config.h"             /* Hardwired parameters */
  41 #include "glapitable.h"
  42 #include "glthread.h"
  43 #include "math/m_matrix.h"      /* GLmatrix */
  44 #include "bitset.h"
  45
  46
  47 /**
  48  * Special, internal token
  49  */
  50 #define GL_SHADER_PROGRAM 0x9999
  51
  52
  53 /**
  54  * Color channel data type.
  55  */
  56 #if CHAN_BITS == 8
  57    typedef GLubyte GLchan;
  58 #define CHAN_MAX 255
  59 #define CHAN_MAXF 255.0F
  60 #define CHAN_TYPE GL_UNSIGNED_BYTE
  61 #elif CHAN_BITS == 16
  62    typedef GLushort GLchan;
  63 #define CHAN_MAX 65535
  64 #define CHAN_MAXF 65535.0F
  65 #define CHAN_TYPE GL_UNSIGNED_SHORT
  66 #elif CHAN_BITS == 32
  67    typedef GLfloat GLchan;
  68 #define CHAN_MAX 1.0
  69 #define CHAN_MAXF 1.0F
  70 #define CHAN_TYPE GL_FLOAT
  71 #else
  72 #error "illegal number of color channel bits"
  73 #endif
  74
  75
  76 /**
  77  * Stencil buffer data type.
  78  */
  79 #if STENCIL_BITS==8
  80    typedef GLubyte GLstencil;
  81 #elif STENCIL_BITS==16
  82    typedef GLushort GLstencil;
  83 #else
  84 #  error "illegal number of stencil bits"
  85 #endif
  86
  87
  88 /**
  89  * Fixed point data type.
  90  */
  91 typedef int GLfixed;
  92 /*
  93  * Fixed point arithmetic macros
  94  */
  95 #ifndef FIXED_FRAC_BITS
  96 #define FIXED_FRAC_BITS 11
  97 #endif
  98
  99 #define FIXED_SHIFT     FIXED_FRAC_BITS
 100 #define FIXED_ONE       (1 << FIXED_SHIFT)
 101 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
 102 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
 103 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
 104 #define FIXED_EPSILON   1
 105 #define FIXED_SCALE     ((float) FIXED_ONE)
 106 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 107 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 108 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 109 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 110 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 111 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 112 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 113 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 114 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 115 #define PosFloatToFixed(X)      FloatToFixed(X)
 116 #define SignedFloatToFixed(X)   FloatToFixed(X)
 117
 118
 119
 120 /**
 121  * \name Some forward type declarations
 122  */
 123 /*@{*/
 124 struct _mesa_HashTable;
 125 struct gl_pixelstore_attrib;
 126 struct gl_texture_format;
 127 struct gl_texture_image;
 128 struct gl_texture_object;
 129 typedef struct __GLcontextRec GLcontext;
 130 typedef struct __GLcontextModesRec GLvisual;
 131 typedef struct gl_framebuffer GLframebuffer;
 132 /*@}*/
 133
 134
 135
 136 /**
 137  * Indexes for vertex program attributes.
 138  * GL_NV_vertex_program aliases generic attributes over the conventional
 139  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 140  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 141  * generic attributes are distinct/separate).
 142  */
 143 enum
 144 {
 145    VERT_ATTRIB_POS = 0,
 146    VERT_ATTRIB_WEIGHT = 1,
 147    VERT_ATTRIB_NORMAL = 2,
 148    VERT_ATTRIB_COLOR0 = 3,
 149    VERT_ATTRIB_COLOR1 = 4,
 150    VERT_ATTRIB_FOG = 5,
 151    VERT_ATTRIB_COLOR_INDEX = 6,
 152    VERT_ATTRIB_EDGEFLAG = 7,
 153    VERT_ATTRIB_TEX0 = 8,
 154    VERT_ATTRIB_TEX1 = 9,
 155    VERT_ATTRIB_TEX2 = 10,
 156    VERT_ATTRIB_TEX3 = 11,
 157    VERT_ATTRIB_TEX4 = 12,
 158    VERT_ATTRIB_TEX5 = 13,
 159    VERT_ATTRIB_TEX6 = 14,
 160    VERT_ATTRIB_TEX7 = 15,
 161    VERT_ATTRIB_GENERIC0 = 16,
 162    VERT_ATTRIB_GENERIC1 = 17,
 163    VERT_ATTRIB_GENERIC2 = 18,
 164    VERT_ATTRIB_GENERIC3 = 19,
 165    VERT_ATTRIB_GENERIC4 = 20,
 166    VERT_ATTRIB_GENERIC5 = 21,
 167    VERT_ATTRIB_GENERIC6 = 22,
 168    VERT_ATTRIB_GENERIC7 = 23,
 169    VERT_ATTRIB_GENERIC8 = 24,
 170    VERT_ATTRIB_GENERIC9 = 25,
 171    VERT_ATTRIB_GENERIC10 = 26,
 172    VERT_ATTRIB_GENERIC11 = 27,
 173    VERT_ATTRIB_GENERIC12 = 28,
 174    VERT_ATTRIB_GENERIC13 = 29,
 175    VERT_ATTRIB_GENERIC14 = 30,
 176    VERT_ATTRIB_GENERIC15 = 31,
 177    VERT_ATTRIB_MAX = 32
 178 };
 179
 180 /**
 181  * Bitflags for vertex attributes.
 182  * These are used in bitfields in many places.
 183  */
 184 /*@{*/
 185 #define VERT_BIT_POS         (1 << VERT_ATTRIB_POS)
 186 #define VERT_BIT_WEIGHT      (1 << VERT_ATTRIB_WEIGHT)
 187 #define VERT_BIT_NORMAL      (1 << VERT_ATTRIB_NORMAL)
 188 #define VERT_BIT_COLOR0      (1 << VERT_ATTRIB_COLOR0)
 189 #define VERT_BIT_COLOR1      (1 << VERT_ATTRIB_COLOR1)
 190 #define VERT_BIT_FOG         (1 << VERT_ATTRIB_FOG)
 191 #define VERT_BIT_COLOR_INDEX (1 << VERT_ATTRIB_COLOR_INDEX)
 192 #define VERT_BIT_EDGEFLAG    (1 << VERT_ATTRIB_EDGEFLAG)
 193 #define VERT_BIT_TEX0        (1 << VERT_ATTRIB_TEX0)
 194 #define VERT_BIT_TEX1        (1 << VERT_ATTRIB_TEX1)
 195 #define VERT_BIT_TEX2        (1 << VERT_ATTRIB_TEX2)
 196 #define VERT_BIT_TEX3        (1 << VERT_ATTRIB_TEX3)
 197 #define VERT_BIT_TEX4        (1 << VERT_ATTRIB_TEX4)
 198 #define VERT_BIT_TEX5        (1 << VERT_ATTRIB_TEX5)
 199 #define VERT_BIT_TEX6        (1 << VERT_ATTRIB_TEX6)
 200 #define VERT_BIT_TEX7        (1 << VERT_ATTRIB_TEX7)
 201 #define VERT_BIT_GENERIC0    (1 << VERT_ATTRIB_GENERIC0)
 202 #define VERT_BIT_GENERIC1    (1 << VERT_ATTRIB_GENERIC1)
 203 #define VERT_BIT_GENERIC2    (1 << VERT_ATTRIB_GENERIC2)
 204 #define VERT_BIT_GENERIC3    (1 << VERT_ATTRIB_GENERIC3)
 205 #define VERT_BIT_GENERIC4    (1 << VERT_ATTRIB_GENERIC4)
 206 #define VERT_BIT_GENERIC5    (1 << VERT_ATTRIB_GENERIC5)
 207 #define VERT_BIT_GENERIC6    (1 << VERT_ATTRIB_GENERIC6)
 208 #define VERT_BIT_GENERIC7    (1 << VERT_ATTRIB_GENERIC7)
 209 #define VERT_BIT_GENERIC8    (1 << VERT_ATTRIB_GENERIC8)
 210 #define VERT_BIT_GENERIC9    (1 << VERT_ATTRIB_GENERIC9)
 211 #define VERT_BIT_GENERIC10   (1 << VERT_ATTRIB_GENERIC10)
 212 #define VERT_BIT_GENERIC11   (1 << VERT_ATTRIB_GENERIC11)
 213 #define VERT_BIT_GENERIC12   (1 << VERT_ATTRIB_GENERIC12)
 214 #define VERT_BIT_GENERIC13   (1 << VERT_ATTRIB_GENERIC13)
 215 #define VERT_BIT_GENERIC14   (1 << VERT_ATTRIB_GENERIC14)
 216 #define VERT_BIT_GENERIC15   (1 << VERT_ATTRIB_GENERIC15)
 217
 218 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 219 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 220 /*@}*/
 221
 222
 223 /**
 224  * Indexes for vertex program result attributes
 225  */
 226 /*@{*/
 227 #define VERT_RESULT_HPOS 0
 228 #define VERT_RESULT_COL0 1
 229 #define VERT_RESULT_COL1 2
 230 #define VERT_RESULT_FOGC 3
 231 #define VERT_RESULT_TEX0 4
 232 #define VERT_RESULT_TEX1 5
 233 #define VERT_RESULT_TEX2 6
 234 #define VERT_RESULT_TEX3 7
 235 #define VERT_RESULT_TEX4 8
 236 #define VERT_RESULT_TEX5 9
 237 #define VERT_RESULT_TEX6 10
 238 #define VERT_RESULT_TEX7 11
 239 #define VERT_RESULT_PSIZ 12
 240 #define VERT_RESULT_BFC0 13
 241 #define VERT_RESULT_BFC1 14
 242 #define VERT_RESULT_EDGE 15
 243 #define VERT_RESULT_VAR0 16  /**< shader varying */
 244 #define VERT_RESULT_MAX  (VERT_RESULT_VAR0 + MAX_VARYING)
 245 /*@}*/
 246
 247
 248 /**
 249  * Indexes for fragment program input attributes.
 250  */
 251 enum
 252 {
 253    FRAG_ATTRIB_WPOS = 0,
 254    FRAG_ATTRIB_COL0 = 1,
 255    FRAG_ATTRIB_COL1 = 2,
 256    FRAG_ATTRIB_FOGC = 3,
 257    FRAG_ATTRIB_TEX0 = 4,
 258    FRAG_ATTRIB_TEX1 = 5,
 259    FRAG_ATTRIB_TEX2 = 6,
 260    FRAG_ATTRIB_TEX3 = 7,
 261    FRAG_ATTRIB_TEX4 = 8,
 262    FRAG_ATTRIB_TEX5 = 9,
 263    FRAG_ATTRIB_TEX6 = 10,
 264    FRAG_ATTRIB_TEX7 = 11,
 265    FRAG_ATTRIB_VAR0 = 12,  /**< shader varying */
 266    FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + MAX_VARYING)
 267 };
 268
 269 /**
 270  * Bitflags for fragment program input attributes.
 271  */
 272 /*@{*/
 273 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 274 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 275 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 276 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 277 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 278 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 279 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 280 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 281 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 282 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 283 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 284 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 285 #define FRAG_BIT_VAR0  (1 << FRAG_ATTRIB_VAR0)
 286
 287 #define FRAG_BIT_TEX(U)  (FRAG_BIT_TEX0 << (U))
 288 #define FRAG_BIT_VAR(V)  (FRAG_BIT_VAR0 << (V))
 289
 290 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 291                            FRAG_BIT_TEX1|       \
 292                            FRAG_BIT_TEX2|       \
 293                            FRAG_BIT_TEX3|       \
 294                            FRAG_BIT_TEX4|       \
 295                            FRAG_BIT_TEX5|       \
 296                            FRAG_BIT_TEX6|       \
 297                            FRAG_BIT_TEX7)
 298 /*@}*/
 299
 300
 301 /**
 302  * Fragment program results
 303  */
 304 enum
 305 {
 306    FRAG_RESULT_COLR = 0,
 307    FRAG_RESULT_COLH = 1,
 308    FRAG_RESULT_DEPR = 2,
 309    FRAG_RESULT_MAX = 3
 310 };
 311
 312
 313 /**
 314  * Indexes for all renderbuffers
 315  */
 316 enum {
 317    BUFFER_FRONT_LEFT  = 0,  /* the four standard color buffers */
 318    BUFFER_BACK_LEFT   = 1,
 319    BUFFER_FRONT_RIGHT = 2,
 320    BUFFER_BACK_RIGHT  = 3,
 321    BUFFER_AUX0        = 4,  /* optional aux buffer */
 322    BUFFER_AUX1        = 5,
 323    BUFFER_AUX2        = 6,
 324    BUFFER_AUX3        = 7,
 325    BUFFER_DEPTH       = 8,
 326    BUFFER_STENCIL     = 9,
 327    BUFFER_ACCUM       = 10,
 328    BUFFER_COLOR0      = 11, /* generic renderbuffers */
 329    BUFFER_COLOR1      = 12,
 330    BUFFER_COLOR2      = 13,
 331    BUFFER_COLOR3      = 14,
 332    BUFFER_COLOR4      = 15,
 333    BUFFER_COLOR5      = 16,
 334    BUFFER_COLOR6      = 17,
 335    BUFFER_COLOR7      = 18,
 336    BUFFER_COUNT       = 19
 337 };
 338
 339 /**
 340  * Bit flags for all renderbuffers
 341  */
 342 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 343 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 344 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 345 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 346 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 347 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 348 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 349 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 350 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 351 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 352 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 353 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 354 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 355 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 356 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 357 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 358 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 359 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 360 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 361
 362 /**
 363  * Mask of all the color buffer bits (but not accum).
 364  */
 365 #define BUFFER_BITS_COLOR  (BUFFER_BIT_FRONT_LEFT | \
 366                             BUFFER_BIT_BACK_LEFT | \
 367                             BUFFER_BIT_FRONT_RIGHT | \
 368                             BUFFER_BIT_BACK_RIGHT | \
 369                             BUFFER_BIT_AUX0 | \
 370                             BUFFER_BIT_AUX1 | \
 371                             BUFFER_BIT_AUX2 | \
 372                             BUFFER_BIT_AUX3 | \
 373                             BUFFER_BIT_COLOR0 | \
 374                             BUFFER_BIT_COLOR1 | \
 375                             BUFFER_BIT_COLOR2 | \
 376                             BUFFER_BIT_COLOR3 | \
 377                             BUFFER_BIT_COLOR4 | \
 378                             BUFFER_BIT_COLOR5 | \
 379                             BUFFER_BIT_COLOR6 | \
 380                             BUFFER_BIT_COLOR7)
 381
 382
 383
 384
 385 /**
 386  * Data structure for color tables
 387  */
 388 struct gl_color_table
 389 {
 390    GLenum InternalFormat;      /**< The user-specified format */
 391    GLenum _BaseFormat;         /**< GL_ALPHA, GL_RGBA, GL_RGB, etc */
 392    GLuint Size;                /**< number of entries in table */
 393    GLfloat *TableF;            /**< Color table, floating point values */
 394    GLubyte *TableUB;           /**< Color table, ubyte values */
 395    GLubyte RedSize;
 396    GLubyte GreenSize;
 397    GLubyte BlueSize;
 398    GLubyte AlphaSize;
 399    GLubyte LuminanceSize;
 400    GLubyte IntensitySize;
 401 };
 402
 403
 404 /**
 405  * \name Bit flags used for updating material values.
 406  */
 407 /*@{*/
 408 #define MAT_ATTRIB_FRONT_AMBIENT           0
 409 #define MAT_ATTRIB_BACK_AMBIENT            1
 410 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 411 #define MAT_ATTRIB_BACK_DIFFUSE            3
 412 #define MAT_ATTRIB_FRONT_SPECULAR          4
 413 #define MAT_ATTRIB_BACK_SPECULAR           5
 414 #define MAT_ATTRIB_FRONT_EMISSION          6
 415 #define MAT_ATTRIB_BACK_EMISSION           7
 416 #define MAT_ATTRIB_FRONT_SHININESS         8
 417 #define MAT_ATTRIB_BACK_SHININESS          9
 418 #define MAT_ATTRIB_FRONT_INDEXES           10
 419 #define MAT_ATTRIB_BACK_INDEXES            11
 420 #define MAT_ATTRIB_MAX                     12
 421
 422 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 423 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 424 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 425 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 426 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 427 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 428
 429 #define MAT_INDEX_AMBIENT  0
 430 #define MAT_INDEX_DIFFUSE  1
 431 #define MAT_INDEX_SPECULAR 2
 432
 433 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 434 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 435 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 436 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 437 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 438 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 439 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 440 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 441 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 442 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 443 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 444 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 445
 446
 447 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 448                                  MAT_BIT_FRONT_AMBIENT |        \
 449                                  MAT_BIT_FRONT_DIFFUSE |        \
 450                                  MAT_BIT_FRONT_SPECULAR |       \
 451                                  MAT_BIT_FRONT_SHININESS |      \
 452                                  MAT_BIT_FRONT_INDEXES)
 453
 454 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 455                                  MAT_BIT_BACK_AMBIENT |         \
 456                                  MAT_BIT_BACK_DIFFUSE |         \
 457                                  MAT_BIT_BACK_SPECULAR |        \
 458                                  MAT_BIT_BACK_SHININESS |       \
 459                                  MAT_BIT_BACK_INDEXES)
 460
 461 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 462 /*@}*/
 463
 464
 465 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 466 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 467
 468 /**
 469  * Material shininess lookup table.
 470  */
 471 struct gl_shine_tab
 472 {
 473    struct gl_shine_tab *next, *prev;
 474    GLfloat tab[SHINE_TABLE_SIZE+1];
 475    GLfloat shininess;
 476    GLuint refcount;
 477 };
 478
 479
 480 /**
 481  * Light source state.
 482  */
 483 struct gl_light
 484 {
 485    struct gl_light *next;       /**< double linked list with sentinel */
 486    struct gl_light *prev;
 487
 488    GLfloat Ambient[4];          /**< ambient color */
 489    GLfloat Diffuse[4];          /**< diffuse color */
 490    GLfloat Specular[4];         /**< specular color */
 491    GLfloat EyePosition[4];      /**< position in eye coordinates */
 492    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 493    GLfloat SpotExponent;
 494    GLfloat SpotCutoff;          /**< in degrees */
 495    GLfloat _CosCutoffNeg;       /**< = cos(SpotCutoff) */
 496    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 497    GLfloat ConstantAttenuation;
 498    GLfloat LinearAttenuation;
 499    GLfloat QuadraticAttenuation;
 500    GLboolean Enabled;           /**< On/off flag */
 501
 502    /**
 503     * \name Derived fields
 504     */
 505    /*@{*/
 506    GLbitfield _Flags;           /**< State */
 507
 508    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 509    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 510    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 511    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 512    GLfloat _VP_inf_spot_attenuation;
 513
 514    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 515    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 516    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 517    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 518    GLfloat _dli;                /**< CI diffuse light intensity */
 519    GLfloat _sli;                /**< CI specular light intensity */
 520    /*@}*/
 521 };
 522
 523
 524 /**
 525  * Light model state.
 526  */
 527 struct gl_lightmodel
 528 {
 529    GLfloat Ambient[4];          /**< ambient color */
 530    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 531    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 532    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 533                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 534 };
 535
 536
 537 /**
 538  * Material state.
 539  */
 540 struct gl_material
 541 {
 542    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 543 };
 544
 545
 546 /**
 547  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 548  */
 549 struct gl_accum_attrib
 550 {
 551    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 552 };
 553
 554
 555 /**
 556  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 557  */
 558 struct gl_colorbuffer_attrib
 559 {
 560    GLuint ClearIndex;                   /**< Index to use for glClear */
 561    GLclampf ClearColor[4];              /**< Color to use for glClear */
 562
 563    GLuint IndexMask;                    /**< Color index write mask */
 564    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 565
 566    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 567
 568    /**
 569     * \name alpha testing
 570     */
 571    /*@{*/
 572    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 573    GLenum AlphaFunc;                    /**< Alpha test function */
 574    GLclampf AlphaRef;                   /**< Alpha reference value */
 575    /*@}*/
 576
 577    /**
 578     * \name Blending
 579     */
 580    /*@{*/
 581    GLboolean BlendEnabled;              /**< Blending enabled flag */
 582    GLenum BlendSrcRGB;                  /**< Blending source operator */
 583    GLenum BlendDstRGB;                  /**< Blending destination operator */
 584    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 585    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 586    GLenum BlendEquationRGB;             /**< Blending equation */
 587    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 588    GLfloat BlendColor[4];               /**< Blending color */
 589    /*@}*/
 590
 591    /**
 592     * \name Logic op
 593     */
 594    /*@{*/
 595    GLenum LogicOp;                      /**< Logic operator */
 596    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 597    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 598    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 599    /*@}*/
 600
 601    GLboolean DitherFlag;                /**< Dither enable flag */
 602
 603    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 604    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 605 };
 606
 607
 608 /**
 609  * Current attribute group (GL_CURRENT_BIT).
 610  */
 611 struct gl_current_attrib
 612 {
 613    /**
 614     * \name Current vertex attributes.
 615     * \note Values are valid only after FLUSH_VERTICES has been called.
 616     * \note Index and Edgeflag current values are stored as floats in the
 617     * SIX and SEVEN attribute slots.
 618     */
 619    /*@{*/
 620    GLfloat Attrib[VERT_ATTRIB_MAX][4];  /**< Position, color, texcoords, etc */
 621    /*@}*/
 622
 623    /**
 624     * \name Current raster position attributes (always valid).
 625     * \note This set of attributes is very similar to the SWvertex struct.
 626     */
 627    /*@{*/
 628    GLfloat RasterPos[4];
 629    GLfloat RasterDistance;
 630    GLfloat RasterColor[4];
 631    GLfloat RasterSecondaryColor[4];
 632    GLfloat RasterIndex;
 633    GLfloat RasterTexCoords[MAX_TEXTURE_COORD_UNITS][4];
 634    GLboolean RasterPosValid;
 635    /*@}*/
 636 };
 637
 638
 639 /**
 640  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 641  */
 642 struct gl_depthbuffer_attrib
 643 {
 644    GLenum Func;                 /**< Function for depth buffer compare */
 645    GLclampd Clear;              /**< Value to clear depth buffer to */
 646    GLboolean Test;              /**< Depth buffering enabled flag */
 647    GLboolean Mask;              /**< Depth buffer writable? */
 648    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 649    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 650 };
 651
 652
 653 /**
 654  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
 655  */
 656 struct gl_enable_attrib
 657 {
 658    GLboolean AlphaTest;
 659    GLboolean AutoNormal;
 660    GLboolean Blend;
 661    GLbitfield ClipPlanes;
 662    GLboolean ColorMaterial;
 663    GLboolean ColorTable;                /* SGI_color_table */
 664    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 665    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 666    GLboolean Convolution1D;
 667    GLboolean Convolution2D;
 668    GLboolean Separable2D;
 669    GLboolean CullFace;
 670    GLboolean DepthTest;
 671    GLboolean Dither;
 672    GLboolean Fog;
 673    GLboolean Histogram;
 674    GLboolean Light[MAX_LIGHTS];
 675    GLboolean Lighting;
 676    GLboolean LineSmooth;
 677    GLboolean LineStipple;
 678    GLboolean IndexLogicOp;
 679    GLboolean ColorLogicOp;
 680    GLboolean Map1Color4;
 681    GLboolean Map1Index;
 682    GLboolean Map1Normal;
 683    GLboolean Map1TextureCoord1;
 684    GLboolean Map1TextureCoord2;
 685    GLboolean Map1TextureCoord3;
 686    GLboolean Map1TextureCoord4;
 687    GLboolean Map1Vertex3;
 688    GLboolean Map1Vertex4;
 689    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 690    GLboolean Map2Color4;
 691    GLboolean Map2Index;
 692    GLboolean Map2Normal;
 693    GLboolean Map2TextureCoord1;
 694    GLboolean Map2TextureCoord2;
 695    GLboolean Map2TextureCoord3;
 696    GLboolean Map2TextureCoord4;
 697    GLboolean Map2Vertex3;
 698    GLboolean Map2Vertex4;
 699    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 700    GLboolean MinMax;
 701    GLboolean Normalize;
 702    GLboolean PixelTexture;
 703    GLboolean PointSmooth;
 704    GLboolean PolygonOffsetPoint;
 705    GLboolean PolygonOffsetLine;
 706    GLboolean PolygonOffsetFill;
 707    GLboolean PolygonSmooth;
 708    GLboolean PolygonStipple;
 709    GLboolean RescaleNormals;
 710    GLboolean Scissor;
 711    GLboolean Stencil;
 712    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 713    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 714    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 715    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 716    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 717    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 718    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 719    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 720    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 721    /* SGI_texture_color_table */
 722    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 723    /* GL_ARB_vertex_program / GL_NV_vertex_program */
 724    GLboolean VertexProgram;
 725    GLboolean VertexProgramPointSize;
 726    GLboolean VertexProgramTwoSide;
 727    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 728    GLboolean PointSprite;
 729    GLboolean FragmentShaderATI;
 730 };
 731
 732
 733 /**
 734  * Evaluator attribute group (GL_EVAL_BIT).
 735  */
 736 struct gl_eval_attrib
 737 {
 738    /**
 739     * \name Enable bits
 740     */
 741    /*@{*/
 742    GLboolean Map1Color4;
 743    GLboolean Map1Index;
 744    GLboolean Map1Normal;
 745    GLboolean Map1TextureCoord1;
 746    GLboolean Map1TextureCoord2;
 747    GLboolean Map1TextureCoord3;
 748    GLboolean Map1TextureCoord4;
 749    GLboolean Map1Vertex3;
 750    GLboolean Map1Vertex4;
 751    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 752    GLboolean Map2Color4;
 753    GLboolean Map2Index;
 754    GLboolean Map2Normal;
 755    GLboolean Map2TextureCoord1;
 756    GLboolean Map2TextureCoord2;
 757    GLboolean Map2TextureCoord3;
 758    GLboolean Map2TextureCoord4;
 759    GLboolean Map2Vertex3;
 760    GLboolean Map2Vertex4;
 761    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 762    GLboolean AutoNormal;
 763    /*@}*/
 764
 765    /**
 766     * \name Map Grid endpoints and divisions and calculated du values
 767     */
 768    /*@{*/
 769    GLint MapGrid1un;
 770    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 771    GLint MapGrid2un, MapGrid2vn;
 772    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 773    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 774    /*@}*/
 775 };
 776
 777
 778 /**
 779  * Fog attribute group (GL_FOG_BIT).
 780  */
 781 struct gl_fog_attrib
 782 {
 783    GLboolean Enabled;           /**< Fog enabled flag */
 784    GLfloat Color[4];            /**< Fog color */
 785    GLfloat Density;             /**< Density >= 0.0 */
 786    GLfloat Start;               /**< Start distance in eye coords */
 787    GLfloat End;                 /**< End distance in eye coords */
 788    GLfloat Index;               /**< Fog index */
 789    GLenum Mode;                 /**< Fog mode */
 790    GLboolean ColorSumEnabled;
 791    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 792    GLfloat _Scale;              /**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
 793 };
 794
 795
 796 /**
 797  * Hint attribute group (GL_HINT_BIT).
 798  *
 799  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 800  */
 801 struct gl_hint_attrib
 802 {
 803    GLenum PerspectiveCorrection;
 804    GLenum PointSmooth;
 805    GLenum LineSmooth;
 806    GLenum PolygonSmooth;
 807    GLenum Fog;
 808    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 809    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 810    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 811    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 812 };
 813
 814
 815 /**
 816  * Histogram attributes.
 817  */
 818 struct gl_histogram_attrib
 819 {
 820    GLuint Width;                                /**< number of table entries */
 821    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 822    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 823    GLboolean Sink;                              /**< terminate image transfer? */
 824    GLubyte RedSize;                             /**< Bits per counter */
 825    GLubyte GreenSize;
 826    GLubyte BlueSize;
 827    GLubyte AlphaSize;
 828    GLubyte LuminanceSize;
 829 };
 830
 831
 832 /**
 833  * Color Min/max state.
 834  */
 835 struct gl_minmax_attrib
 836 {
 837    GLenum Format;
 838    GLboolean Sink;
 839    GLfloat Min[4], Max[4];   /**< RGBA */
 840 };
 841
 842
 843 /**
 844  * Image convolution state.
 845  */
 846 struct gl_convolution_attrib
 847 {
 848    GLenum Format;
 849    GLenum InternalFormat;
 850    GLuint Width;
 851    GLuint Height;
 852    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 853 };
 854
 855
 856 /**
 857  * Light state flags.
 858  */
 859 /*@{*/
 860 #define LIGHT_SPOT         0x1
 861 #define LIGHT_LOCAL_VIEWER 0x2
 862 #define LIGHT_POSITIONAL   0x4
 863 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 864 /*@}*/
 865
 866
 867 /**
 868  * Lighting attribute group (GL_LIGHT_BIT).
 869  */
 870 struct gl_light_attrib
 871 {
 872    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 873    struct gl_lightmodel Model;          /**< Lighting model */
 874
 875    /**
 876     * Must flush FLUSH_VERTICES before referencing:
 877     */
 878    /*@{*/
 879    struct gl_material Material;         /**< Includes front & back values */
 880    /*@}*/
 881
 882    GLboolean Enabled;                   /**< Lighting enabled flag */
 883    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 884    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 885    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 886    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 887    GLboolean ColorMaterialEnabled;
 888    GLenum ClampVertexColor;
 889
 890    struct gl_light EnabledList;         /**< List sentinel */
 891
 892    /**
 893     * Derived state for optimizations:
 894     */
 895    /*@{*/
 896    GLboolean _NeedEyeCoords;
 897    GLboolean _NeedVertices;             /**< Use fast shader? */
 898    GLbitfield  _Flags;                  /**< LIGHT_* flags, see above */
 899    GLfloat _BaseColor[2][3];
 900    /*@}*/
 901 };
 902
 903
 904 /**
 905  * Line attribute group (GL_LINE_BIT).
 906  */
 907 struct gl_line_attrib
 908 {
 909    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 910    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 911    GLushort StipplePattern;     /**< Stipple pattern */
 912    GLint StippleFactor;         /**< Stipple repeat factor */
 913    GLfloat Width;               /**< Line width */
 914    GLfloat _Width;              /**< Clamped Line width */
 915 };
 916
 917
 918 /**
 919  * Display list attribute group (GL_LIST_BIT).
 920  */
 921 struct gl_list_attrib
 922 {
 923    GLuint ListBase;
 924 };
 925
 926
 927 /**
 928  * Used by device drivers to hook new commands into display lists.
 929  */
 930 struct gl_list_instruction
 931 {
 932    GLuint Size;
 933    void (*Execute)( GLcontext *ctx, void *data );
 934    void (*Destroy)( GLcontext *ctx, void *data );
 935    void (*Print)( GLcontext *ctx, void *data );
 936 };
 937
 938 #define MAX_DLIST_EXT_OPCODES 16
 939
 940 /**
 941  * Used by device drivers to hook new commands into display lists.
 942  */
 943 struct gl_list_extensions
 944 {
 945    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 946    GLuint NumOpcodes;
 947 };
 948
 949
 950 /**
 951  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 952  */
 953 struct gl_multisample_attrib
 954 {
 955    GLboolean Enabled;
 956    GLboolean SampleAlphaToCoverage;
 957    GLboolean SampleAlphaToOne;
 958    GLboolean SampleCoverage;
 959    GLfloat SampleCoverageValue;
 960    GLboolean SampleCoverageInvert;
 961 };
 962
 963
 964 /**
 965  * Pixel attribute group (GL_PIXEL_MODE_BIT).
 966  */
 967 struct gl_pixel_attrib
 968 {
 969    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
 970    GLfloat RedBias, RedScale;
 971    GLfloat GreenBias, GreenScale;
 972    GLfloat BlueBias, BlueScale;
 973    GLfloat AlphaBias, AlphaScale;
 974    GLfloat DepthBias, DepthScale;
 975    GLint IndexShift, IndexOffset;
 976    GLboolean MapColorFlag;
 977    GLboolean MapStencilFlag;
 978    GLfloat ZoomX, ZoomY;
 979    /* XXX move these out of gl_pixel_attrib */
 980    GLint MapStoSsize;           /**< Size of each pixel map */
 981    GLint MapItoIsize;
 982    GLint MapItoRsize;
 983    GLint MapItoGsize;
 984    GLint MapItoBsize;
 985    GLint MapItoAsize;
 986    GLint MapRtoRsize;
 987    GLint MapGtoGsize;
 988    GLint MapBtoBsize;
 989    GLint MapAtoAsize;
 990    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 991    GLfloat MapItoI[MAX_PIXEL_MAP_TABLE];
 992    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 993    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 994    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 995    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 996    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 997    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 998    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 999    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
1000    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
1001    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
1002    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
1003    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
1004    /** GL_EXT_histogram */
1005    GLboolean HistogramEnabled;
1006    GLboolean MinMaxEnabled;
1007    /** GL_SGI_color_matrix */
1008    GLfloat PostColorMatrixScale[4];  /**< RGBA */
1009    GLfloat PostColorMatrixBias[4];   /**< RGBA */
1010    /** GL_SGI_color_table */
1011    GLfloat ColorTableScale[4];
1012    GLfloat ColorTableBias[4];
1013    GLboolean ColorTableEnabled;
1014    GLfloat PCCTscale[4];
1015    GLfloat PCCTbias[4];
1016    GLboolean PostConvolutionColorTableEnabled;
1017    GLfloat PCMCTscale[4];
1018    GLfloat PCMCTbias[4];
1019    GLboolean PostColorMatrixColorTableEnabled;
1020    /** GL_SGI_texture_color_table */
1021    GLfloat TextureColorTableScale[4];
1022    GLfloat TextureColorTableBias[4];
1023    /** Convolution */
1024    GLboolean Convolution1DEnabled;
1025    GLboolean Convolution2DEnabled;
1026    GLboolean Separable2DEnabled;
1027    GLfloat ConvolutionBorderColor[3][4];
1028    GLenum ConvolutionBorderMode[3];
1029    GLfloat ConvolutionFilterScale[3][4];
1030    GLfloat ConvolutionFilterBias[3][4];
1031    GLfloat PostConvolutionScale[4];  /**< RGBA */
1032    GLfloat PostConvolutionBias[4];   /**< RGBA */
1033 };
1034
1035
1036 /**
1037  * Point attribute group (GL_POINT_BIT).
1038  */
1039 struct gl_point_attrib
1040 {
1041    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1042    GLfloat Size;                /**< User-specified point size */
1043    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
1044    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1045    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1046    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1047    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1048    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
1049    GLboolean CoordReplace[MAX_TEXTURE_COORD_UNITS]; /**< GL_ARB_point_sprite */
1050    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1051    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1052 };
1053
1054
1055 /**
1056  * Polygon attribute group (GL_POLYGON_BIT).
1057  */
1058 struct gl_polygon_attrib
1059 {
1060    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1061    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1062    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1063    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1064    GLboolean CullFlag;          /**< Culling on/off flag */
1065    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1066    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1067    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1068    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1069    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1070    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1071    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1072    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1073 };
1074
1075
1076 /**
1077  * Scissor attributes (GL_SCISSOR_BIT).
1078  */
1079 struct gl_scissor_attrib
1080 {
1081    GLboolean Enabled;           /**< Scissor test enabled? */
1082    GLint X, Y;                  /**< Lower left corner of box */
1083    GLsizei Width, Height;       /**< Size of box */
1084 };
1085
1086
1087 /**
1088  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1089  */
1090 struct gl_stencil_attrib
1091 {
1092    GLboolean Enabled;           /**< Enabled flag */
1093    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1094    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1095    GLboolean _TestTwoSide;
1096    GLenum Function[2];          /**< Stencil function */
1097    GLenum FailFunc[2];          /**< Fail function */
1098    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1099    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1100    GLint Ref[2];                /**< Reference value */
1101    GLuint ValueMask[2];         /**< Value mask */
1102    GLuint WriteMask[2];         /**< Write mask */
1103    GLuint Clear;                /**< Clear value */
1104 };
1105
1106
1107 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
1108
1109 /**
1110  * An index for each type of texture object
1111  */
1112 /*@{*/
1113 #define TEXTURE_1D_INDEX    0
1114 #define TEXTURE_2D_INDEX    1
1115 #define TEXTURE_3D_INDEX    2
1116 #define TEXTURE_CUBE_INDEX  3
1117 #define TEXTURE_RECT_INDEX  4
1118 /*@}*/
1119
1120 /**
1121  * Bit flags for each type of texture object
1122  * Used for Texture.Unit[]._ReallyEnabled flags.
1123  */
1124 /*@{*/
1125 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
1126 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
1127 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
1128 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
1129 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
1130 /*@}*/
1131
1132
1133 /**
1134  * TexGenEnabled flags.
1135  */
1136 /*@{*/
1137 #define S_BIT 1
1138 #define T_BIT 2
1139 #define R_BIT 4
1140 #define Q_BIT 8
1141 /*@}*/
1142
1143
1144 /**
1145  * Bit flag versions of the corresponding GL_ constants.
1146  */
1147 /*@{*/
1148 #define TEXGEN_SPHERE_MAP        0x1
1149 #define TEXGEN_OBJ_LINEAR        0x2
1150 #define TEXGEN_EYE_LINEAR        0x4
1151 #define TEXGEN_REFLECTION_MAP_NV 0x8
1152 #define TEXGEN_NORMAL_MAP_NV     0x10
1153
1154 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1155                                   TEXGEN_REFLECTION_MAP_NV | \
1156                                   TEXGEN_NORMAL_MAP_NV)
1157 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1158                                   TEXGEN_REFLECTION_MAP_NV | \
1159                                   TEXGEN_NORMAL_MAP_NV     | \
1160                                   TEXGEN_EYE_LINEAR)
1161 /*@}*/
1162
1163
1164 /* A selection of state flags to make driver and module's lives easier. */
1165 #define ENABLE_TEXGEN0        0x1
1166 #define ENABLE_TEXGEN1        0x2
1167 #define ENABLE_TEXGEN2        0x4
1168 #define ENABLE_TEXGEN3        0x8
1169 #define ENABLE_TEXGEN4        0x10
1170 #define ENABLE_TEXGEN5        0x20
1171 #define ENABLE_TEXGEN6        0x40
1172 #define ENABLE_TEXGEN7        0x80
1173
1174 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1175 #define ENABLE_TEXMAT1        0x2
1176 #define ENABLE_TEXMAT2        0x4
1177 #define ENABLE_TEXMAT3        0x8
1178 #define ENABLE_TEXMAT4        0x10
1179 #define ENABLE_TEXMAT5        0x20
1180 #define ENABLE_TEXMAT6        0x40
1181 #define ENABLE_TEXMAT7        0x80
1182
1183 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1184 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1185
1186
1187 /**
1188  * Texel fetch function prototype.  We use texel fetch functions to
1189  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1190  * texture images.  These functions help to isolate us from the gritty
1191  * details of all the various texture image encodings.
1192  *
1193  * \param texImage texture image.
1194  * \param col texel column.
1195  * \param row texel row.
1196  * \param img texel image level/layer.
1197  * \param texelOut output texel (up to 4 GLchans)
1198  */
1199 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1200                                  GLint col, GLint row, GLint img,
1201                                  GLchan *texelOut );
1202
1203 /**
1204  * As above, but returns floats.
1205  * Used for depth component images and for upcoming signed/float
1206  * texture images.
1207  */
1208 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1209                                  GLint col, GLint row, GLint img,
1210                                  GLfloat *texelOut );
1211
1212
1213 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1214                                GLint col, GLint row, GLint img,
1215                                const void *texel);
1216
1217
1218 /**
1219  * This macro defines the (many) parameters to the texstore functions.
1220  * \param dims  either 1 or 2 or 3
1221  * \param baseInternalFormat  user-specified base internal format
1222  * \param dstFormat  destination Mesa texture format
1223  * \param dstAddr  destination image address
1224  * \param dstX/Y/Zoffset  destination x/y/z offset (ala TexSubImage), in texels
1225  * \param dstRowStride  destination image row stride, in bytes
1226  * \param dstImageOffsets  offset of each 2D slice within 3D texture, in texels
1227  * \param srcWidth/Height/Depth  source image size, in pixels
1228  * \param srcFormat  incoming image format
1229  * \param srcType  incoming image data type
1230  * \param srcAddr  source image address
1231  * \param srcPacking  source image packing parameters
1232  */
1233 #define TEXSTORE_PARAMS \
1234         GLcontext *ctx, GLuint dims, \
1235         GLenum baseInternalFormat, \
1236         const struct gl_texture_format *dstFormat, \
1237         GLvoid *dstAddr, \
1238         GLint dstXoffset, GLint dstYoffset, GLint dstZoffset, \
1239         GLint dstRowStride, const GLuint *dstImageOffsets, \
1240         GLint srcWidth, GLint srcHeight, GLint srcDepth, \
1241         GLenum srcFormat, GLenum srcType, \
1242         const GLvoid *srcAddr, \
1243         const struct gl_pixelstore_attrib *srcPacking
1244
1245
1246
1247 /**
1248  * Texture image storage function.
1249  */
1250 typedef GLboolean (*StoreTexImageFunc)(TEXSTORE_PARAMS);
1251
1252
1253 /**
1254  * Texture format record
1255  */
1256 struct gl_texture_format
1257 {
1258    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1259
1260    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1261                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1262                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1263                                  *   GL_DEPTH_COMPONENT.
1264                                  */
1265    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1266    GLubyte RedBits;             /**< Bits per texel component */
1267    GLubyte GreenBits;           /**< These are just rough approximations for */
1268    GLubyte BlueBits;            /**< compressed texture formats. */
1269    GLubyte AlphaBits;
1270    GLubyte LuminanceBits;
1271    GLubyte IntensityBits;
1272    GLubyte IndexBits;
1273    GLubyte DepthBits;
1274    GLubyte StencilBits;         /**< GL_EXT_packed_depth_stencil */
1275
1276    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1277
1278    StoreTexImageFunc StoreImage;
1279
1280    /**
1281     * \name Texel fetch function pointers
1282     */
1283    /*@{*/
1284    FetchTexelFuncC FetchTexel1D;
1285    FetchTexelFuncC FetchTexel2D;
1286    FetchTexelFuncC FetchTexel3D;
1287    FetchTexelFuncF FetchTexel1Df;
1288    FetchTexelFuncF FetchTexel2Df;
1289    FetchTexelFuncF FetchTexel3Df;
1290    /*@}*/
1291
1292    StoreTexelFunc StoreTexel;
1293 };
1294
1295
1296 #define MAX_3D_TEXTURE_SIZE (1 << (MAX_3D_TEXTURE_LEVELS - 1))
1297
1298 /**
1299  * Texture image state.  Describes the dimensions of a texture image,
1300  * the texel format and pointers to Texel Fetch functions.
1301  */
1302 struct gl_texture_image
1303 {
1304    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1305                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1306                                  *   GL_INTENSITY, GL_COLOR_INDEX,
1307                                  *   GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT
1308                                  *   only. Used for choosing TexEnv arithmetic.
1309                                  */
1310    GLint InternalFormat;        /**< Internal format as given by the user */
1311    GLuint Border;               /**< 0 or 1 */
1312    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1313    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1314    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1315    GLuint Width2;               /**< = Width - 2*Border */
1316    GLuint Height2;              /**< = Height - 2*Border */
1317    GLuint Depth2;               /**< = Depth - 2*Border */
1318    GLuint WidthLog2;            /**< = log2(Width2) */
1319    GLuint HeightLog2;           /**< = log2(Height2) */
1320    GLuint DepthLog2;            /**< = log2(Depth2) */
1321    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1322    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1323    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1324    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1325    GLboolean IsClientData;      /**< Data owned by client? */
1326    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1327
1328    const struct gl_texture_format *TexFormat;
1329
1330    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1331
1332    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1333    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1334
1335    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1336    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1337
1338    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1339    GLuint *ImageOffsets;        /**< if 3D texture: array [Depth] of offsets to
1340                                      each 2D slice in 'Data', in texels */
1341    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1342
1343    /**
1344     * \name For device driver:
1345     */
1346    /*@{*/
1347    void *DriverData;            /**< Arbitrary device driver data */
1348    /*@}*/
1349 };
1350
1351
1352 /**
1353  * Indexes for cube map faces.
1354  */
1355 /*@{*/
1356 #define FACE_POS_X   0
1357 #define FACE_NEG_X   1
1358 #define FACE_POS_Y   2
1359 #define FACE_NEG_Y   3
1360 #define FACE_POS_Z   4
1361 #define FACE_NEG_Z   5
1362 #define MAX_FACES  6
1363 /*@}*/
1364
1365
1366 /**
1367  * Texture object state.  Contains the array of mipmap images, border color,
1368  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1369  * color palette.
1370  */
1371 struct gl_texture_object
1372 {
1373    _glthread_Mutex Mutex;       /**< for thread safety */
1374    GLint RefCount;              /**< reference count */
1375    GLuint Name;                 /**< the user-visible texture object ID */
1376    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1377    GLfloat Priority;            /**< in [0,1] */
1378    GLfloat BorderColor[4];      /**< unclamped */
1379    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1380    GLenum WrapS;                /**< S-axis texture image wrap mode */
1381    GLenum WrapT;                /**< T-axis texture image wrap mode */
1382    GLenum WrapR;                /**< R-axis texture image wrap mode */
1383    GLenum MinFilter;            /**< minification filter */
1384    GLenum MagFilter;            /**< magnification filter */
1385    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1386    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1387    GLfloat LodBias;             /**< OpenGL 1.4 */
1388    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1389    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1390    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1391    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1392    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1393    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1394    GLenum CompareMode;          /**< GL_ARB_shadow */
1395    GLenum CompareFunc;          /**< GL_ARB_shadow */
1396    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1397    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1398    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1399    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1400    GLboolean Complete;          /**< Is texture object complete? */
1401
1402    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1403    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1404
1405    /** GL_EXT_paletted_texture */
1406    struct gl_color_table Palette;
1407
1408
1409    /**
1410     * \name For device driver.
1411     * Note: instead of attaching driver data to this pointer, it's preferable
1412     * to instead use this struct as a base class for your own texture object
1413     * class.  Driver->NewTextureObject() can be used to implement the
1414     * allocation.
1415     */
1416    void *DriverData;    /**< Arbitrary device driver data */
1417 };
1418
1419
1420 /**
1421  * Texture combine environment state.
1422  *
1423  * \todo
1424  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1425  * structure will need to be expanded for 4 elements.
1426  */
1427 struct gl_tex_env_combine_state
1428 {
1429    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1430    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1431    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1432    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1433    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1434    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1435    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1436    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1437    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1438    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1439 };
1440
1441
1442 /**
1443  * Texture unit state.  Contains enable flags, texture environment/function/
1444  * combiners, texgen state, pointers to current texture objects and
1445  * post-filter color tables.
1446  */
1447 struct gl_texture_unit
1448 {
1449    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1450    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1451
1452    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1453    GLfloat EnvColor[4];
1454    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1455    /** \name Tex coord generation mode
1456     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1457    /*@{*/
1458    GLenum GenModeS;
1459    GLenum GenModeT;
1460    GLenum GenModeR;
1461    GLenum GenModeQ;
1462    /*@}*/
1463    GLbitfield _GenBitS;
1464    GLbitfield _GenBitT;
1465    GLbitfield _GenBitR;
1466    GLbitfield _GenBitQ;
1467    GLbitfield _GenFlags;        /**< bitwise or of GenBit[STRQ] */
1468    GLfloat ObjectPlaneS[4];
1469    GLfloat ObjectPlaneT[4];
1470    GLfloat ObjectPlaneR[4];
1471    GLfloat ObjectPlaneQ[4];
1472    GLfloat EyePlaneS[4];
1473    GLfloat EyePlaneT[4];
1474    GLfloat EyePlaneR[4];
1475    GLfloat EyePlaneQ[4];
1476    GLfloat LodBias;             /**< for biasing mipmap levels */
1477
1478    /**
1479     * \name GL_EXT_texture_env_combine
1480     */
1481    struct gl_tex_env_combine_state Combine;
1482
1483    /**
1484     * Derived state based on \c EnvMode and the \c BaseFormat of the
1485     * currently enabled texture.
1486     */
1487    struct gl_tex_env_combine_state _EnvMode;
1488
1489    /**
1490     * Currently enabled combiner state.  This will point to either
1491     * \c Combine or \c _EnvMode.
1492     */
1493    struct gl_tex_env_combine_state *_CurrentCombine;
1494
1495    struct gl_texture_object *Current1D;
1496    struct gl_texture_object *Current2D;
1497    struct gl_texture_object *Current3D;
1498    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1499    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1500
1501    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1502
1503    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1504    struct gl_texture_object Saved2D;
1505    struct gl_texture_object Saved3D;
1506    struct gl_texture_object SavedCubeMap;
1507    struct gl_texture_object SavedRect;
1508
1509    /* GL_SGI_texture_color_table */
1510    struct gl_color_table ColorTable;
1511    struct gl_color_table ProxyColorTable;
1512    GLboolean ColorTableEnabled;
1513 };
1514
1515 struct texenvprog_cache_item {
1516    GLuint hash;
1517    void *key;
1518    struct gl_fragment_program *data;
1519    struct texenvprog_cache_item *next;
1520 };
1521
1522 struct texenvprog_cache {
1523    struct texenvprog_cache_item **items;
1524    GLuint size, n_items;
1525    GLcontext *ctx;
1526 };
1527
1528 /**
1529  * Texture attribute group (GL_TEXTURE_BIT).
1530  */
1531 struct gl_texture_attrib
1532 {
1533    /**
1534     * name multitexture
1535     */
1536    /**@{*/
1537    GLuint CurrentUnit;         /**< Active texture unit */
1538    GLbitfield _EnabledUnits;  /**< one bit set for each really-enabled unit */
1539    GLbitfield _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1540    GLbitfield _GenFlags;            /**< for texgen */
1541    GLbitfield _TexGenEnabled;
1542    GLbitfield _TexMatEnabled;
1543    /**@}*/
1544
1545    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1546
1547    struct gl_texture_object *Proxy1D;
1548    struct gl_texture_object *Proxy2D;
1549    struct gl_texture_object *Proxy3D;
1550    struct gl_texture_object *ProxyCubeMap;
1551    struct gl_texture_object *ProxyRect;
1552
1553    /** GL_EXT_shared_texture_palette */
1554    GLboolean SharedPalette;
1555    struct gl_color_table Palette;
1556
1557    /** Cached texenv fragment programs */
1558    struct texenvprog_cache env_fp_cache;
1559 };
1560
1561
1562 /**
1563  * Transformation attribute group (GL_TRANSFORM_BIT).
1564  */
1565 struct gl_transform_attrib
1566 {
1567    GLenum MatrixMode;                           /**< Matrix mode */
1568    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1569    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1570    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1571    GLboolean Normalize;                         /**< Normalize all normals? */
1572    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1573    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1574
1575    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1576    GLfloat CullEyePos[4];
1577    GLfloat CullObjPos[4];
1578 };
1579
1580
1581 /**
1582  * Viewport attribute group (GL_VIEWPORT_BIT).
1583  */
1584 struct gl_viewport_attrib
1585 {
1586    GLint X, Y;                  /**< position */
1587    GLsizei Width, Height;       /**< size */
1588    GLfloat Near, Far;           /**< Depth buffer range */
1589    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1590 };
1591
1592
1593 /**
1594  * Node for the attribute stack.
1595  */
1596 struct gl_attrib_node
1597 {
1598    GLbitfield kind;
1599    void *data;
1600    struct gl_attrib_node *next;
1601 };
1602
1603
1604 /**
1605  * GL_ARB_vertex/pixel_buffer_object buffer object
1606  */
1607 struct gl_buffer_object
1608 {
1609    GLint RefCount;
1610    GLuint Name;
1611    GLenum Usage;
1612    GLenum Access;
1613    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1614    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1615    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1616    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1617 };
1618
1619
1620
1621 /**
1622  * Client pixel packing/unpacking attributes
1623  */
1624 struct gl_pixelstore_attrib
1625 {
1626    GLint Alignment;
1627    GLint RowLength;
1628    GLint SkipPixels;
1629    GLint SkipRows;
1630    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1631    GLint SkipImages;      /**< for GL_EXT_texture3D */
1632    GLboolean SwapBytes;
1633    GLboolean LsbFirst;
1634    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1635    GLboolean Invert;        /**< GL_MESA_pack_invert */
1636    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1637 };
1638
1639
1640
1641 /**
1642  * Client vertex array attributes
1643  */
1644 struct gl_client_array
1645 {
1646    GLint Size;                  /**< components per element (1,2,3,4) */
1647    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1648    GLsizei Stride;              /**< user-specified stride */
1649    GLsizei StrideB;             /**< actual stride in bytes */
1650    const GLubyte *Ptr;          /**< Points to array data */
1651    GLboolean Enabled;           /**< Enabled flag is a boolean */
1652    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1653
1654    /**< GL_ARB_vertex_buffer_object */
1655    struct gl_buffer_object *BufferObj;
1656    GLuint _MaxElement;
1657 };
1658
1659
1660 /**
1661  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1662  * extension, but a nice encapsulation in any case.
1663  */
1664 struct gl_array_object
1665 {
1666    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1667    GLuint Name;
1668
1669    /** Conventional vertex arrays */
1670    /*@{*/
1671    struct gl_client_array Vertex;
1672    struct gl_client_array Normal;
1673    struct gl_client_array Color;
1674    struct gl_client_array SecondaryColor;
1675    struct gl_client_array FogCoord;
1676    struct gl_client_array Index;
1677    struct gl_client_array EdgeFlag;
1678    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1679    /*@}*/
1680
1681    /** Generic arrays for vertex programs/shaders */
1682    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1683
1684    /** Mask of _NEW_ARRAY_* values indicating which arrays are enabled */
1685    GLbitfield _Enabled;
1686 };
1687
1688
1689 /**
1690  * Vertex array state
1691  */
1692 struct gl_array_attrib
1693 {
1694    struct gl_array_object *ArrayObj;
1695    struct gl_array_object *DefaultArrayObj;
1696
1697    GLint ActiveTexture;         /**< Client Active Texture */
1698    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1699    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1700
1701    GLbitfield NewState;         /**< mask of _NEW_ARRAY_* values */
1702
1703 #if FEATURE_ARB_vertex_buffer_object
1704    struct gl_buffer_object *NullBufferObj;
1705    struct gl_buffer_object *ArrayBufferObj;
1706    struct gl_buffer_object *ElementArrayBufferObj;
1707 #endif
1708    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1709 };
1710
1711
1712 /**
1713  * Feedback buffer state
1714  */
1715 struct gl_feedback
1716 {
1717    GLenum Type;
1718    GLbitfield _Mask;            /* FB_* bits */
1719    GLfloat *Buffer;
1720    GLuint BufferSize;
1721    GLuint Count;
1722 };
1723
1724
1725 /**
1726  * Selection buffer state
1727  */
1728 struct gl_selection
1729 {
1730    GLuint *Buffer;      /**< selection buffer */
1731    GLuint BufferSize;   /**< size of the selection buffer */
1732    GLuint BufferCount;  /**< number of values in the selection buffer */
1733    GLuint Hits;         /**< number of records in the selection buffer */
1734    GLuint NameStackDepth; /**< name stack depth */
1735    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1736    GLboolean HitFlag;   /**< hit flag */
1737    GLfloat HitMinZ;     /**< minimum hit depth */
1738    GLfloat HitMaxZ;     /**< maximum hit depth */
1739 };
1740
1741
1742 /**
1743  * 1-D Evaluator control points
1744  */
1745 struct gl_1d_map
1746 {
1747    GLuint Order;        /**< Number of control points */
1748    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1749    GLfloat *Points;     /**< Points to contiguous control points */
1750 };
1751
1752
1753 /**
1754  * 2-D Evaluator control points
1755  */
1756 struct gl_2d_map
1757 {
1758    GLuint Uorder;               /**< Number of control points in U dimension */
1759    GLuint Vorder;               /**< Number of control points in V dimension */
1760    GLfloat u1, u2, du;
1761    GLfloat v1, v2, dv;
1762    GLfloat *Points;             /**< Points to contiguous control points */
1763 };
1764
1765
1766 /**
1767  * All evaluator control point state
1768  */
1769 struct gl_evaluators
1770 {
1771    /**
1772     * \name 1-D maps
1773     */
1774    /*@{*/
1775    struct gl_1d_map Map1Vertex3;
1776    struct gl_1d_map Map1Vertex4;
1777    struct gl_1d_map Map1Index;
1778    struct gl_1d_map Map1Color4;
1779    struct gl_1d_map Map1Normal;
1780    struct gl_1d_map Map1Texture1;
1781    struct gl_1d_map Map1Texture2;
1782    struct gl_1d_map Map1Texture3;
1783    struct gl_1d_map Map1Texture4;
1784    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1785    /*@}*/
1786
1787    /**
1788     * \name 2-D maps
1789     */
1790    /*@{*/
1791    struct gl_2d_map Map2Vertex3;
1792    struct gl_2d_map Map2Vertex4;
1793    struct gl_2d_map Map2Index;
1794    struct gl_2d_map Map2Color4;
1795    struct gl_2d_map Map2Normal;
1796    struct gl_2d_map Map2Texture1;
1797    struct gl_2d_map Map2Texture2;
1798    struct gl_2d_map Map2Texture3;
1799    struct gl_2d_map Map2Texture4;
1800    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1801    /*@}*/
1802 };
1803
1804
1805 /**
1806  * Names of the various vertex/fragment program register files, etc.
1807  *
1808  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1809  * All values should fit in a 4-bit field.
1810  *
1811  * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
1812  * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
1813  * be "uniform" variables since they can only be set outside glBegin/End.
1814  * They're also all stored in the same Parameters array.
1815  */
1816 enum register_file
1817 {
1818    PROGRAM_TEMPORARY = 0,   /**< machine->Temporary[] */
1819    PROGRAM_LOCAL_PARAM = 1, /**< gl_program->LocalParams[] */
1820    PROGRAM_ENV_PARAM = 2,   /**< gl_program->Parameters[] */
1821    PROGRAM_STATE_VAR = 3,   /**< gl_program->Parameters[] */
1822    PROGRAM_INPUT = 4,       /**< machine->Inputs[] */
1823    PROGRAM_OUTPUT = 5,      /**< machine->Outputs[] */
1824    PROGRAM_NAMED_PARAM = 6, /**< gl_program->Parameters[] */
1825    PROGRAM_CONSTANT = 7,    /**< gl_program->Parameters[] */
1826    PROGRAM_UNIFORM = 8,     /**< gl_program->Parameters[] */
1827    PROGRAM_VARYING = 9,     /**< machine->Inputs[]/Outputs[] */
1828    PROGRAM_WRITE_ONLY = 10, /**< A dummy, write-only register */
1829    PROGRAM_ADDRESS = 11,    /**< machine->AddressReg */
1830    PROGRAM_SAMPLER = 12,    /**< for shader samplers, compile-time only */
1831    PROGRAM_UNDEFINED = 13,  /**< Invalid value */
1832    PROGRAM_FILE_MAX
1833 };
1834
1835
1836 /** Vertex and fragment instructions */
1837 struct prog_instruction;
1838 struct gl_program_parameter_list;
1839
1840
1841 /**
1842  * Base class for any kind of program object
1843  */
1844 struct gl_program
1845 {
1846    GLuint Id;
1847    GLubyte *String;  /**< Null-terminated program text */
1848    GLint RefCount;
1849    GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
1850    GLenum Format;    /**< String encoding format */
1851    GLboolean Resident;
1852
1853    struct prog_instruction *Instructions;
1854
1855    GLbitfield InputsRead;     /**< Bitmask of which input regs are read */
1856    GLbitfield OutputsWritten; /**< Bitmask of which output regs are written to */
1857    GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1858
1859    /** Named parameters, constants, etc. from program text */
1860    struct gl_program_parameter_list *Parameters;
1861    /** Numbered local parameters */
1862    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1863
1864    /** Vertex/fragment shader varying vars */
1865    struct gl_program_parameter_list *Varying;
1866    /** Vertex program user-defined attributes */
1867    struct gl_program_parameter_list *Attributes;
1868
1869    /** Logical counts */
1870    /*@{*/
1871    GLuint NumInstructions;
1872    GLuint NumTemporaries;
1873    GLuint NumParameters;
1874    GLuint NumAttributes;
1875    GLuint NumAddressRegs;
1876    GLuint NumAluInstructions;
1877    GLuint NumTexInstructions;
1878    GLuint NumTexIndirections;
1879    /*@}*/
1880    /** Native, actual h/w counts */
1881    /*@{*/
1882    GLuint NumNativeInstructions;
1883    GLuint NumNativeTemporaries;
1884    GLuint NumNativeParameters;
1885    GLuint NumNativeAttributes;
1886    GLuint NumNativeAddressRegs;
1887    GLuint NumNativeAluInstructions;
1888    GLuint NumNativeTexInstructions;
1889    GLuint NumNativeTexIndirections;
1890    /*@}*/
1891 };
1892
1893
1894 /** Vertex program object */
1895 struct gl_vertex_program
1896 {
1897    struct gl_program Base;   /**< base class */
1898    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1899    GLboolean IsPositionInvariant;
1900    void *TnlData;               /**< should probably use Base.DriverData */
1901 };
1902
1903
1904 /** Fragment program object */
1905 struct gl_fragment_program
1906 {
1907    struct gl_program Base;   /**< base class */
1908    GLenum FogOption;
1909    GLboolean UsesKill;
1910 };
1911
1912
1913 /**
1914  * State common to vertex and fragment programs.
1915  */
1916 struct gl_program_state
1917 {
1918    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1919    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1920 };
1921
1922
1923 /**
1924  * Context state for vertex programs.
1925  */
1926 struct gl_vertex_program_state
1927 {
1928    GLboolean Enabled;               /**< GL_VERTEX_PROGRAM_ARB/NV */
1929    GLboolean _Enabled;              /**< Enabled and valid program? */
1930    GLboolean PointSizeEnabled;      /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1931    GLboolean TwoSideEnabled;        /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1932    struct gl_vertex_program *Current;  /**< ptr to currently bound program */
1933
1934    /** Currently enabled and valid program (including internal programs) */
1935    struct gl_vertex_program *_Current;
1936
1937    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1938
1939    /* For GL_NV_vertex_program only: */
1940    GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
1941    GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];
1942
1943    /** Should fixed-function T&L be implemented with a vertex prog? */
1944    GLboolean _MaintainTnlProgram;
1945
1946    /** Program to emulate fixed-function T&L (see above) */
1947    struct gl_vertex_program *_TnlProgram;
1948
1949 #if FEATURE_MESA_program_debug
1950    GLprogramcallbackMESA Callback;
1951    GLvoid *CallbackData;
1952    GLboolean CallbackEnabled;
1953    GLuint CurrentPosition;
1954 #endif
1955 };
1956
1957
1958 /**
1959  * Context state for fragment programs.
1960  */
1961 struct gl_fragment_program_state
1962 {
1963    GLboolean Enabled;     /**< User-set fragment program enable flag */
1964    GLboolean _Enabled;    /**< Fragment program enabled and valid? */
1965    struct gl_fragment_program *Current;  /**< User-bound program */
1966
1967    /** Currently enabled and valid program (including internal programs) */
1968    struct gl_fragment_program *_Current;
1969
1970    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1971
1972    /** Should fixed-function texturing be implemented with a fragment prog? */
1973    GLboolean _MaintainTexEnvProgram;
1974
1975    /** Program to emulate fixed-function texture env/combine (see above) */
1976    struct gl_fragment_program *_TexEnvProgram;
1977
1978 #if FEATURE_MESA_program_debug
1979    GLprogramcallbackMESA Callback;
1980    GLvoid *CallbackData;
1981    GLboolean CallbackEnabled;
1982    GLuint CurrentPosition;
1983 #endif
1984 };
1985
1986
1987 /**
1988  * ATI_fragment_shader runtime state
1989  */
1990 #define ATI_FS_INPUT_PRIMARY 0
1991 #define ATI_FS_INPUT_SECONDARY 1
1992
1993 struct atifs_instruction;
1994 struct atifs_setupinst;
1995
1996 /**
1997  * ATI fragment shader
1998  */
1999 struct ati_fragment_shader
2000 {
2001    GLuint Id;
2002    GLint RefCount;
2003    struct atifs_instruction *Instructions[2];
2004    struct atifs_setupinst *SetupInst[2];
2005    GLfloat Constants[8][4];
2006    GLbitfield LocalConstDef;  /** Indicates which constants have been set */
2007    GLubyte numArithInstr[2];
2008    GLubyte regsAssigned[2];
2009    GLubyte NumPasses;         /** 1 or 2 */
2010    GLubyte cur_pass;
2011    GLubyte last_optype;
2012    GLboolean interpinp1;
2013    GLboolean isValid;
2014    GLuint swizzlerq;
2015 };
2016
2017 /**
2018  * Context state for GL_ATI_fragment_shader
2019  */
2020 struct gl_ati_fragment_shader_state
2021 {
2022    GLboolean Enabled;
2023    GLboolean _Enabled;                      /** enabled and valid shader? */
2024    GLboolean Compiling;
2025    GLfloat GlobalConstants[8][4];
2026    struct ati_fragment_shader *Current;
2027 };
2028
2029
2030 /**
2031  * Occlusion/timer query object.
2032  */
2033 struct gl_query_object
2034 {
2035    GLuint Id;
2036    GLuint64EXT Result; /* the counter */
2037    GLboolean Active;   /* inside Begin/EndQuery */
2038    GLboolean Ready;    /* result is ready */
2039 };
2040
2041
2042 /**
2043  * Context state for query objects.
2044  */
2045 struct gl_query_state
2046 {
2047    struct _mesa_HashTable *QueryObjects;
2048    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2049    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2050 };
2051
2052
2053
2054 /**
2055  * A GLSL shader object.
2056  */
2057 struct gl_shader
2058 {
2059    GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER (first field!) */
2060    GLuint Name;  /**< AKA the handle */
2061    GLint RefCount;  /**< Reference count */
2062    GLboolean DeletePending;
2063
2064    const GLchar *Source;  /**< Source code string */
2065    GLboolean CompileStatus;
2066    GLuint NumPrograms;  /**< size of Programs[] array */
2067    struct gl_program **Programs;  /**< Post-compile assembly code */
2068    GLchar *InfoLog;
2069 };
2070
2071
2072 /**
2073  * A GLSL program object.  Basically a linked collection of "shaders".
2074  */
2075 struct gl_shader_program
2076 {
2077    GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
2078    GLuint Name;  /**< aka handle or ID */
2079    GLint RefCount;  /**< Reference count */
2080    GLboolean DeletePending;
2081
2082    GLuint NumShaders;          /**< number of attached shaders */
2083    struct gl_shader **Shaders; /**< List of attached the shaders */
2084
2085    /* post-link info: */
2086    struct gl_vertex_program *VertexProgram;     /**< Linked vertex program */
2087    struct gl_fragment_program *FragmentProgram; /**< Linked fragment prog */
2088    struct gl_program_parameter_list *Uniforms; /**< Plus constants, etc */
2089    struct gl_program_parameter_list *Varying;
2090    struct gl_program_parameter_list *Attributes; /**< Vertex attributes */
2091    GLboolean LinkStatus;   /**< GL_LINK_STATUS */
2092    GLboolean Validated;
2093    GLchar *InfoLog;
2094 };
2095
2096
2097 /**
2098  * Context state for GLSL vertex/fragment shaders.
2099  */
2100 struct gl_shader_state
2101 {
2102    GLboolean _VertexShaderPresent;
2103    GLboolean _FragmentShaderPresent;
2104    struct gl_shader_program *CurrentProgram;
2105 };
2106
2107
2108 /**
2109  * State which can be shared by multiple contexts:
2110  */
2111 struct gl_shared_state
2112 {
2113    _glthread_Mutex Mutex;                  /**< for thread safety */
2114    GLint RefCount;                         /**< Reference count */
2115    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2116    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2117
2118    /**
2119     * \name Default texture objects (shared by all multi-texture units)
2120     */
2121    /*@{*/
2122    struct gl_texture_object *Default1D;
2123    struct gl_texture_object *Default2D;
2124    struct gl_texture_object *Default3D;
2125    struct gl_texture_object *DefaultCubeMap;
2126    struct gl_texture_object *DefaultRect;
2127    /*@}*/
2128
2129    /**
2130     * \name Thread safety and statechange notification for texture
2131     * objects.
2132     *
2133     * \todo Improve the granularity of locking.
2134     */
2135    /*@{*/
2136    _glthread_Mutex TexMutex;               /**< texobj thread safety */
2137    GLuint TextureStateStamp;               /**< state notification for shared tex  */
2138    /*@}*/
2139
2140
2141
2142    /**
2143     * \name Vertex/fragment programs
2144     */
2145    /*@{*/
2146    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2147 #if FEATURE_ARB_vertex_program
2148    struct gl_program *DefaultVertexProgram;
2149 #endif
2150 #if FEATURE_ARB_fragment_program
2151    struct gl_program *DefaultFragmentProgram;
2152 #endif
2153    /*@}*/
2154
2155 #if FEATURE_ATI_fragment_shader
2156    struct _mesa_HashTable *ATIShaders;
2157    struct ati_fragment_shader *DefaultFragmentShader;
2158 #endif
2159
2160 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2161    struct _mesa_HashTable *BufferObjects;
2162 #endif
2163
2164 #if FEATURE_ARB_shader_objects
2165    /** Table of both gl_shader and gl_shader_program objects */
2166    struct _mesa_HashTable *ShaderObjects;
2167 #endif
2168
2169 #if FEATURE_EXT_framebuffer_object
2170    struct _mesa_HashTable *RenderBuffers;
2171    struct _mesa_HashTable *FrameBuffers;
2172 #endif
2173
2174    /** Objects associated with the GL_APPLE_vertex_array_object extension. */
2175    struct _mesa_HashTable *ArrayObjects;
2176
2177    void *DriverData;  /**< Device driver shared state */
2178 };
2179
2180
2181
2182
2183 /**
2184  * A renderbuffer stores colors or depth values or stencil values.
2185  * A framebuffer object will have a collection of these.
2186  * Data are read/written to the buffer with a handful of Get/Put functions.
2187  *
2188  * Instances of this object are allocated with the Driver's NewRenderbuffer
2189  * hook.  Drivers will likely wrap this class inside a driver-specific
2190  * class to simulate inheritance.
2191  */
2192 struct gl_renderbuffer
2193 {
2194    _glthread_Mutex Mutex;                  /**< for thread safety */
2195    GLuint ClassID;        /**< Useful for drivers */
2196    GLuint Name;
2197    GLint RefCount;
2198    GLuint Width, Height;
2199    GLenum InternalFormat; /**< The user-specified format */
2200    GLenum _ActualFormat;  /**< The driver-chosen format */
2201    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2202                                GL_STENCIL_INDEX. */
2203    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2204    GLubyte RedBits;      /**< Bits of red per pixel */
2205    GLubyte GreenBits;
2206    GLubyte BlueBits;
2207    GLubyte AlphaBits;
2208    GLubyte IndexBits;
2209    GLubyte DepthBits;
2210    GLubyte StencilBits;
2211    GLvoid *Data;
2212
2213    /* Used to wrap one renderbuffer around another: */
2214    struct gl_renderbuffer *Wrapped;
2215
2216    /* Delete this renderbuffer */
2217    void (*Delete)(struct gl_renderbuffer *rb);
2218
2219    /* Allocate new storage for this renderbuffer */
2220    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2221                              GLenum internalFormat,
2222                              GLuint width, GLuint height);
2223
2224    /* Lock/Unlock are called before/after calling the Get/Put functions.
2225     * Not sure this is the right place for these yet.
2226    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2227    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2228     */
2229
2230    /* Return a pointer to the element/pixel at (x,y).
2231     * Should return NULL if the buffer memory can't be directly addressed.
2232     */
2233    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2234                        GLint x, GLint y);
2235
2236    /* Get/Read a row of values.
2237     * The values will be of format _BaseFormat and type DataType.
2238     */
2239    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2240                   GLint x, GLint y, void *values);
2241
2242    /* Get/Read values at arbitrary locations.
2243     * The values will be of format _BaseFormat and type DataType.
2244     */
2245    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2246                      const GLint x[], const GLint y[], void *values);
2247
2248    /* Put/Write a row of values.
2249     * The values will be of format _BaseFormat and type DataType.
2250     */
2251    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2252                   GLint x, GLint y, const void *values, const GLubyte *mask);
2253
2254    /* Put/Write a row of RGB values.  This is a special-case routine that's
2255     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2256     * a common case for glDrawPixels and some triangle routines.
2257     * The values will be of format GL_RGB and type DataType.
2258     */
2259    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2260                     GLint x, GLint y, const void *values, const GLubyte *mask);
2261
2262
2263    /* Put/Write a row of identical values.
2264     * The values will be of format _BaseFormat and type DataType.
2265     */
2266    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2267                      GLint x, GLint y, const void *value, const GLubyte *mask);
2268
2269    /* Put/Write values at arbitrary locations.
2270     * The values will be of format _BaseFormat and type DataType.
2271     */
2272    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2273                      const GLint x[], const GLint y[], const void *values,
2274                      const GLubyte *mask);
2275    /* Put/Write identical values at arbitrary locations.
2276     * The values will be of format _BaseFormat and type DataType.
2277     */
2278    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2279                          GLuint count, const GLint x[], const GLint y[],
2280                          const void *value, const GLubyte *mask);
2281 };
2282
2283
2284 /**
2285  * A renderbuffer attachment point points to either a texture object
2286  * (and specifies a mipmap level, cube face or 3D texture slice) or
2287  * points to a renderbuffer.
2288  */
2289 struct gl_renderbuffer_attachment
2290 {
2291    GLenum Type;  /* GL_NONE or GL_TEXTURE or GL_RENDERBUFFER_EXT */
2292    GLboolean Complete;
2293
2294    /* IF Type == GL_RENDERBUFFER_EXT: */
2295    struct gl_renderbuffer *Renderbuffer;
2296
2297    /* IF Type == GL_TEXTURE: */
2298    struct gl_texture_object *Texture;
2299    GLuint TextureLevel;
2300    GLuint CubeMapFace;  /* 0 .. 5, for cube map textures */
2301    GLuint Zoffset;      /* for 3D textures */
2302 };
2303
2304
2305 /**
2306  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2307  * In C++ terms, think of this as a base class from which device drivers
2308  * will make derived classes.
2309  */
2310 struct gl_framebuffer
2311 {
2312    _glthread_Mutex Mutex;                  /**< for thread safety */
2313    GLuint Name;      /* if zero, this is a window system framebuffer */
2314    GLint RefCount;
2315
2316    GLvisual Visual;     /**< The framebuffer's visual.
2317                              Immutable if this is a window system buffer.
2318                              Computed from attachments if user-made FBO. */
2319
2320    GLboolean Initialized;
2321
2322    GLuint Width, Height;        /**< size of frame buffer in pixels */
2323
2324    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2325    /*@{*/
2326    GLint _Xmin, _Xmax;  /**< inclusive */
2327    GLint _Ymin, _Ymax;  /**< exclusive */
2328    /*@}*/
2329
2330    /** \name  Derived Z buffer stuff */
2331    /*@{*/
2332    GLuint _DepthMax;    /**< Max depth buffer value */
2333    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2334    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2335    /*@}*/
2336
2337    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2338
2339    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2340    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2341
2342    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2343     * attribute group and GL_PIXEL attribute group, respectively.
2344     */
2345    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2346    GLenum ColorReadBuffer;
2347
2348    /* These are computed from ColorDrawBuffer and ColorReadBuffer */
2349    GLbitfield _ColorDrawBufferMask[MAX_DRAW_BUFFERS]; /* Mask of BUFFER_BIT_* flags */
2350    GLint _ColorReadBufferIndex; /* -1 = None */
2351
2352    /* These are computed from _ColorDrawBufferMask and _ColorReadBufferIndex */
2353    GLuint _NumColorDrawBuffers[MAX_DRAW_BUFFERS];
2354    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS][4];
2355    struct gl_renderbuffer *_ColorReadBuffer;
2356
2357    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2358     * depth/stencil buffers attached above. */
2359    struct gl_renderbuffer *_DepthBuffer;
2360    struct gl_renderbuffer *_StencilBuffer;
2361
2362    /** Delete this framebuffer */
2363    void (*Delete)(struct gl_framebuffer *fb);
2364 };
2365
2366
2367 /**
2368  * Limits for vertex and fragment programs.
2369  */
2370 struct gl_program_constants
2371 {
2372    /* logical limits */
2373    GLuint MaxInstructions;
2374    GLuint MaxAluInstructions; /* fragment programs only, for now */
2375    GLuint MaxTexInstructions; /* fragment programs only, for now */
2376    GLuint MaxTexIndirections; /* fragment programs only, for now */
2377    GLuint MaxAttribs;
2378    GLuint MaxTemps;
2379    GLuint MaxAddressRegs; /* vertex program only, for now */
2380    GLuint MaxParameters;
2381    GLuint MaxLocalParams;
2382    GLuint MaxEnvParams;
2383    /* native/hardware limits */
2384    GLuint MaxNativeInstructions;
2385    GLuint MaxNativeAluInstructions; /* fragment programs only, for now */
2386    GLuint MaxNativeTexInstructions; /* fragment programs only, for now */
2387    GLuint MaxNativeTexIndirections; /* fragment programs only, for now */
2388    GLuint MaxNativeAttribs;
2389    GLuint MaxNativeTemps;
2390    GLuint MaxNativeAddressRegs; /* vertex program only, for now */
2391    GLuint MaxNativeParameters;
2392    /* For shaders */
2393    GLuint MaxUniformComponents;
2394 };
2395
2396
2397 /**
2398  * Constants which may be overridden by device driver during context creation
2399  * but are never changed after that.
2400  */
2401 struct gl_constants
2402 {
2403    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2404    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2405    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2406    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2407    GLuint MaxTextureCoordUnits;
2408    GLuint MaxTextureImageUnits;
2409    GLuint MaxTextureUnits;              /* = MIN(CoordUnits, ImageUnits) */
2410    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2411    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2412    GLuint MaxArrayLockSize;
2413    GLint SubPixelBits;
2414    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2415    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2416    GLfloat PointSizeGranularity;
2417    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2418    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2419    GLfloat LineWidthGranularity;
2420    GLuint MaxColorTableSize;
2421    GLuint MaxConvolutionWidth;
2422    GLuint MaxConvolutionHeight;
2423    GLuint MaxClipPlanes;
2424    GLuint MaxLights;
2425    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2426    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2427    GLuint MaxViewportWidth, MaxViewportHeight;
2428    struct gl_program_constants VertexProgram;    /* GL_ARB_vertex_program */
2429    struct gl_program_constants FragmentProgram;  /* GL_ARB_fragment_program */
2430    /* shared by vertex and fragment program: */
2431    GLuint MaxProgramMatrices;
2432    GLuint MaxProgramMatrixStackDepth;
2433    /* vertex array / buffer object bounds checking */
2434    GLboolean CheckArrayBounds;
2435    /* GL_ARB_draw_buffers */
2436    GLuint MaxDrawBuffers;
2437    /* GL_OES_read_format */
2438    GLenum ColorReadFormat;
2439    GLenum ColorReadType;
2440    /* GL_EXT_framebuffer_object */
2441    GLuint MaxColorAttachments;
2442    GLuint MaxRenderbufferSize;
2443    /* GL_ARB_vertex_shader */
2444    GLuint MaxVertexTextureImageUnits;
2445    GLuint MaxVarying;
2446 };
2447
2448
2449 /**
2450  * Enable flag for each OpenGL extension.  Different device drivers will
2451  * enable different extensions at runtime.
2452  */
2453 struct gl_extensions
2454 {
2455    /**
2456     * \name Flags to quickly test if certain extensions are available.
2457     *
2458     * Not every extension needs to have such a flag, but it's encouraged.
2459     */
2460    /*@{*/
2461    GLboolean dummy;  /* don't remove this! */
2462    GLboolean ARB_depth_texture;
2463    GLboolean ARB_draw_buffers;
2464    GLboolean ARB_fragment_program;
2465    GLboolean ARB_fragment_shader;
2466    GLboolean ARB_half_float_pixel;
2467    GLboolean ARB_imaging;
2468    GLboolean ARB_multisample;
2469    GLboolean ARB_multitexture;
2470    GLboolean ARB_occlusion_query;
2471    GLboolean ARB_point_sprite;
2472    GLboolean ARB_shader_objects;
2473    GLboolean ARB_shading_language_100;
2474    GLboolean ARB_shading_language_120;
2475    GLboolean ARB_shadow;
2476    GLboolean ARB_texture_border_clamp;
2477    GLboolean ARB_texture_compression;
2478    GLboolean ARB_texture_cube_map;
2479    GLboolean ARB_texture_env_combine;
2480    GLboolean ARB_texture_env_crossbar;
2481    GLboolean ARB_texture_env_dot3;
2482    GLboolean ARB_texture_float;
2483    GLboolean ARB_texture_mirrored_repeat;
2484    GLboolean ARB_texture_non_power_of_two;
2485    GLboolean ARB_transpose_matrix;
2486    GLboolean ARB_vertex_buffer_object;
2487    GLboolean ARB_vertex_program;
2488    GLboolean ARB_vertex_shader;
2489    GLboolean ARB_window_pos;
2490    GLboolean EXT_abgr;
2491    GLboolean EXT_bgra;
2492    GLboolean EXT_blend_color;
2493    GLboolean EXT_blend_equation_separate;
2494    GLboolean EXT_blend_func_separate;
2495    GLboolean EXT_blend_logic_op;
2496    GLboolean EXT_blend_minmax;
2497    GLboolean EXT_blend_subtract;
2498    GLboolean EXT_clip_volume_hint;
2499    GLboolean EXT_cull_vertex;
2500    GLboolean EXT_convolution;
2501    GLboolean EXT_compiled_vertex_array;
2502    GLboolean EXT_copy_texture;
2503    GLboolean EXT_depth_bounds_test;
2504    GLboolean EXT_draw_range_elements;
2505    GLboolean EXT_framebuffer_object;
2506    GLboolean EXT_fog_coord;
2507    GLboolean EXT_framebuffer_blit;
2508    GLboolean EXT_gpu_program_parameters;
2509    GLboolean EXT_histogram;
2510    GLboolean EXT_multi_draw_arrays;
2511    GLboolean EXT_paletted_texture;
2512    GLboolean EXT_packed_depth_stencil;
2513    GLboolean EXT_packed_pixels;
2514    GLboolean EXT_pixel_buffer_object;
2515    GLboolean EXT_point_parameters;
2516    GLboolean EXT_polygon_offset;
2517    GLboolean EXT_rescale_normal;
2518    GLboolean EXT_shadow_funcs;
2519    GLboolean EXT_secondary_color;
2520    GLboolean EXT_separate_specular_color;
2521    GLboolean EXT_shared_texture_palette;
2522    GLboolean EXT_stencil_wrap;
2523    GLboolean EXT_stencil_two_side;
2524    GLboolean EXT_subtexture;
2525    GLboolean EXT_texture;
2526    GLboolean EXT_texture_object;
2527    GLboolean EXT_texture3D;
2528    GLboolean EXT_texture_compression_s3tc;
2529    GLboolean EXT_texture_env_add;
2530    GLboolean EXT_texture_env_combine;
2531    GLboolean EXT_texture_env_dot3;
2532    GLboolean EXT_texture_filter_anisotropic;
2533    GLboolean EXT_texture_lod_bias;
2534    GLboolean EXT_texture_mirror_clamp;
2535    GLboolean EXT_texture_sRGB;
2536    GLboolean EXT_timer_query;
2537    GLboolean EXT_vertex_array;
2538    GLboolean EXT_vertex_array_set;
2539    /* vendor extensions */
2540    GLboolean APPLE_client_storage;
2541    GLboolean APPLE_packed_pixels;
2542    GLboolean APPLE_vertex_array_object;
2543    GLboolean ATI_texture_mirror_once;
2544    GLboolean ATI_texture_env_combine3;
2545    GLboolean ATI_fragment_shader;
2546    GLboolean ATI_separate_stencil;
2547    GLboolean IBM_rasterpos_clip;
2548    GLboolean IBM_multimode_draw_arrays;
2549    GLboolean MESA_pack_invert;
2550    GLboolean MESA_packed_depth_stencil;
2551    GLboolean MESA_program_debug;
2552    GLboolean MESA_resize_buffers;
2553    GLboolean MESA_ycbcr_texture;
2554    GLboolean NV_blend_square;
2555    GLboolean NV_fragment_program;
2556    GLboolean NV_light_max_exponent;
2557    GLboolean NV_point_sprite;
2558    GLboolean NV_texgen_reflection;
2559    GLboolean NV_texture_rectangle;
2560    GLboolean NV_vertex_program;
2561    GLboolean NV_vertex_program1_1;
2562    GLboolean OES_read_format;
2563    GLboolean SGI_color_matrix;
2564    GLboolean SGI_color_table;
2565    GLboolean SGI_texture_color_table;
2566    GLboolean SGIS_generate_mipmap;
2567    GLboolean SGIS_texture_edge_clamp;
2568    GLboolean SGIS_texture_lod;
2569    GLboolean SGIX_depth_texture;
2570    GLboolean SGIX_shadow;
2571    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2572    GLboolean TDFX_texture_compression_FXT1;
2573    GLboolean S3_s3tc;
2574    /*@}*/
2575    /* The extension string */
2576    const GLubyte *String;
2577 };
2578
2579
2580 /**
2581  * A stack of matrices (projection, modelview, color, texture, etc).
2582  */
2583 struct matrix_stack
2584 {
2585    GLmatrix *Top;      /**< points into Stack */
2586    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2587    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2588    GLuint MaxDepth;    /**< size of Stack[] array */
2589    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2590 };
2591
2592
2593 /**
2594  * \name Bits for image transfer operations
2595  *
2596  * \sa __GLcontextRec::ImageTransferState.
2597  */
2598 /*@{*/
2599 #define IMAGE_SCALE_BIAS_BIT                      0x1
2600 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2601 #define IMAGE_MAP_COLOR_BIT                       0x4
2602 #define IMAGE_COLOR_TABLE_BIT                     0x8
2603 #define IMAGE_CONVOLUTION_BIT                     0x10
2604 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2605 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2606 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2607 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2608 #define IMAGE_HISTOGRAM_BIT                       0x200
2609 #define IMAGE_MIN_MAX_BIT                         0x400
2610 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2611
2612
2613 /** Pixel Transfer ops up to convolution */
2614 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2615                                     IMAGE_SHIFT_OFFSET_BIT |   \
2616                                     IMAGE_MAP_COLOR_BIT |      \
2617                                     IMAGE_COLOR_TABLE_BIT)
2618
2619 /** Pixel transfer ops after convolution */
2620 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2621                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2622                                      IMAGE_COLOR_MATRIX_BIT |                 \
2623                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2624                                      IMAGE_HISTOGRAM_BIT |                    \
2625                                      IMAGE_MIN_MAX_BIT)
2626 /*@}*/
2627
2628
2629 /**
2630  * \name Bits to indicate what state has changed.
2631  *
2632  * 4 unused flags.
2633  */
2634 /*@{*/
2635 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2636 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2637 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2638 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2639 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2640 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2641 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2642 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2643 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2644 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2645 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2646 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2647 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2648 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2649 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2650 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2651 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2652 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2653 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2654 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2655 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2656 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2657 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2658 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2659 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2660 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2661 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2662 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2663 #define _NEW_ALL ~0
2664 /*@}*/
2665
2666
2667 /**
2668  * \name Bits to track array state changes
2669  *
2670  * Also used to summarize array enabled.
2671  */
2672 /*@{*/
2673 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2674 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2675 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2676 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2677 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2678 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2679 #define _NEW_ARRAY_INDEX            VERT_BIT_COLOR_INDEX
2680 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_EDGEFLAG
2681 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2682 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2683 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2684 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2685 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2686 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2687 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2688 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2689 #define _NEW_ARRAY_ATTRIB_0         VERT_BIT_GENERIC0  /* start at bit 16 */
2690 #define _NEW_ARRAY_ALL              0xffffffff
2691
2692
2693 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2694 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2695 /*@}*/
2696
2697
2698 /**
2699  * \name A bunch of flags that we think might be useful to drivers.
2700  *
2701  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2702  */
2703 /*@{*/
2704 #define DD_FLATSHADE                0x1
2705 #define DD_SEPARATE_SPECULAR        0x2
2706 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2707 #define DD_TRI_LIGHT_TWOSIDE        0x8
2708 #define DD_TRI_UNFILLED             0x10
2709 #define DD_TRI_SMOOTH               0x20
2710 #define DD_TRI_STIPPLE              0x40
2711 #define DD_TRI_OFFSET               0x80
2712 #define DD_LINE_SMOOTH              0x100
2713 #define DD_LINE_STIPPLE             0x200
2714 #define DD_LINE_WIDTH               0x400
2715 #define DD_POINT_SMOOTH             0x800
2716 #define DD_POINT_SIZE               0x1000
2717 #define DD_POINT_ATTEN              0x2000
2718 #define DD_TRI_TWOSTENCIL           0x4000
2719 /*@}*/
2720
2721
2722 /**
2723  * \name Define the state changes under which each of these bits might change
2724  */
2725 /*@{*/
2726 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2727 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2728 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2729 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2730 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2731 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2732 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2733 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2734 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2735 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2736 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2737 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2738 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2739 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2740 /*@}*/
2741
2742
2743 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2744                                            _NEW_TEXTURE |       \
2745                                            _NEW_POINT |         \
2746                                            _NEW_PROGRAM |       \
2747                                            _NEW_MODELVIEW)
2748
2749 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2750                                            _NEW_TEXTURE)
2751
2752 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2753
2754
2755
2756
2757 /*
2758  * Forward declaration of display list data types:
2759  */
2760 union node;
2761 typedef union node Node;
2762
2763
2764 /* This has to be included here. */
2765 #include "dd.h"
2766
2767
2768 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2769
2770 /**
2771  * Core Mesa's support for tnl modules:
2772  */
2773 struct gl_tnl_module
2774 {
2775    /**
2776     * Vertex format to be lazily swapped into current dispatch.
2777     */
2778    const GLvertexformat *Current;
2779
2780    /**
2781     * \name Record of functions swapped out.
2782     * On restore, only need to swap these functions back in.
2783     */
2784    /*@{*/
2785    struct {
2786        _glapi_proc * location;
2787        _glapi_proc function;
2788    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2789    GLuint SwapCount;
2790    /*@}*/
2791 };
2792
2793 /* Strictly this is a tnl/ private concept, but it doesn't seem
2794  * worthwhile adding a tnl private structure just to hold this one bit
2795  * of information:
2796  */
2797 #define MESA_DLIST_DANGLING_REFS     0x1
2798
2799 /* Provide a location where information about a display list can be
2800  * collected.  Could be extended with driverPrivate structures,
2801  * etc. in the future.
2802  */
2803 struct mesa_display_list
2804 {
2805    Node *node;
2806    GLuint id;
2807    GLbitfield flags;
2808 };
2809
2810
2811 /**
2812  * State used during display list compilation and execution.
2813  */
2814 struct mesa_list_state
2815 {
2816    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2817    GLuint CallDepth;            /**< Current recursion calling depth */
2818
2819    struct mesa_display_list *CurrentList;
2820    Node *CurrentListPtr;        /**< Head of list being compiled */
2821    GLuint CurrentListNum;       /**< Number of the list being compiled */
2822    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2823    GLuint CurrentPos;           /**< Index into current block of nodes */
2824
2825    GLvertexformat ListVtxfmt;
2826
2827    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2828    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2829
2830    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2831    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2832
2833    GLubyte ActiveIndex;
2834    GLfloat CurrentIndex;
2835
2836    GLubyte ActiveEdgeFlag;
2837    GLboolean CurrentEdgeFlag;
2838 };
2839
2840
2841 /**
2842  * Mesa rendering context.
2843  *
2844  * This is the central context data structure for Mesa.  Almost all
2845  * OpenGL state is contained in this structure.
2846  * Think of this as a base class from which device drivers will derive
2847  * sub classes.
2848  *
2849  * The GLcontext typedef names this structure.
2850  */
2851 struct __GLcontextRec
2852 {
2853    /**
2854     * \name OS related interfaces.
2855     *
2856     * These \b must be the first members of this structure, because they are
2857     * exposed to the outside world (i.e. GLX extension).
2858     */
2859    /*@{*/
2860    __GLimports imports;
2861    __GLexports exports;
2862    /*@}*/
2863
2864    /** State possibly shared with other contexts in the address space */
2865    struct gl_shared_state *Shared;
2866
2867    /** \name API function pointer tables */
2868    /*@{*/
2869    struct _glapi_table *Save;   /**< Display list save functions */
2870    struct _glapi_table *Exec;   /**< Execute functions */
2871    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2872    /*@}*/
2873
2874    GLvisual Visual;
2875    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2876    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2877    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2878    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2879
2880    /**
2881     * Device driver function pointer table
2882     */
2883    struct dd_function_table Driver;
2884
2885    void *DriverCtx;     /**< Points to device driver context/state */
2886    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2887
2888    /** Core/Driver constants */
2889    struct gl_constants Const;
2890
2891    /** \name The various 4x4 matrix stacks */
2892    /*@{*/
2893    struct matrix_stack ModelviewMatrixStack;
2894    struct matrix_stack ProjectionMatrixStack;
2895    struct matrix_stack ColorMatrixStack;
2896    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2897    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2898    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2899    /*@}*/
2900
2901    /** Combined modelview and projection matrix */
2902    GLmatrix _ModelProjectMatrix;
2903
2904    /** \name Display lists */
2905    struct mesa_list_state ListState;
2906
2907    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2908    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2909
2910    /** Extension information */
2911    struct gl_extensions Extensions;
2912
2913    /** \name State attribute stack (for glPush/PopAttrib) */
2914    /*@{*/
2915    GLuint AttribStackDepth;
2916    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2917    /*@}*/
2918
2919    /** \name Renderer attribute groups
2920     *
2921     * We define a struct for each attribute group to make pushing and popping
2922     * attributes easy.  Also it's a good organization.
2923     */
2924    /*@{*/
2925    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
2926    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
2927    struct gl_current_attrib     Current;        /**< Current attributes */
2928    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2929    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2930    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2931    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2932    struct gl_light_attrib       Light;          /**< Light attributes */
2933    struct gl_line_attrib        Line;           /**< Line attributes */
2934    struct gl_list_attrib        List;           /**< List attributes */
2935    struct gl_multisample_attrib Multisample;
2936    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2937    struct gl_point_attrib       Point;          /**< Point attributes */
2938    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2939    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2940    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2941    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2942    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2943    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2944    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2945    /*@}*/
2946
2947    /** \name Client attribute stack */
2948    /*@{*/
2949    GLuint ClientAttribStackDepth;
2950    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2951    /*@}*/
2952
2953    /** \name Client attribute groups */
2954    /*@{*/
2955    struct gl_array_attrib       Array;  /**< Vertex arrays */
2956    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2957    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2958    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2959    /*@}*/
2960
2961    /** \name Other assorted state (not pushed/popped on attribute stack) */
2962    /*@{*/
2963    struct gl_histogram_attrib   Histogram;
2964    struct gl_minmax_attrib      MinMax;
2965    struct gl_convolution_attrib Convolution1D;
2966    struct gl_convolution_attrib Convolution2D;
2967    struct gl_convolution_attrib Separable2D;
2968
2969    struct gl_evaluators EvalMap;   /**< All evaluators */
2970    struct gl_feedback   Feedback;  /**< Feedback */
2971    struct gl_selection  Select;    /**< Selection */
2972
2973    struct gl_color_table ColorTable;       /**< Pre-convolution */
2974    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2975    struct gl_color_table PostConvolutionColorTable;
2976    struct gl_color_table ProxyPostConvolutionColorTable;
2977    struct gl_color_table PostColorMatrixColorTable;
2978    struct gl_color_table ProxyPostColorMatrixColorTable;
2979
2980    struct gl_program_state Program;        /**< for vertex or fragment progs */
2981    struct gl_vertex_program_state VertexProgram;   /**< GL_ARB/NV_vertex_program */
2982    struct gl_fragment_program_state FragmentProgram;  /**< GL_ARB/NV_vertex_program */
2983    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
2984
2985    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
2986
2987    struct gl_shader_state Shader; /**< GLSL shader object state */
2988    /*@}*/
2989
2990 #if FEATURE_EXT_framebuffer_object
2991    struct gl_renderbuffer *CurrentRenderbuffer;
2992 #endif
2993
2994    GLenum ErrorValue;        /**< Last error code */
2995    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2996    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
2997
2998    /** \name Derived state */
2999    /*@{*/
3000    GLbitfield _TriangleCaps;      /**< bitwise-or of DD_* flags */
3001    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
3002    GLfloat _EyeZDir[3];
3003    GLfloat _ModelViewInvScale;
3004    GLboolean _NeedEyeCoords;
3005    GLboolean _ForceEyeCoords;
3006    GLenum _CurrentProgram;    /* currently executing program */
3007
3008    GLuint TextureStateTimestamp; /* detect changes to shared state */
3009
3010    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
3011    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
3012    /**@}*/
3013
3014    struct gl_list_extensions ListExt; /**< driver dlist extensions */
3015
3016
3017    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
3018                     *
3019                     * We don't have a better way to communicate this value from
3020                     * swrast_setup to swrast. */
3021
3022    /** \name For debugging/development only */
3023    /*@{*/
3024    GLboolean FirstTimeCurrent;
3025    /*@}*/
3026
3027    /** Dither disable via MESA_NO_DITHER env var */
3028    GLboolean NoDither;
3029
3030    /** software compression/decompression supported or not */
3031    GLboolean Mesa_DXTn;
3032
3033    /** Core tnl module support */
3034    struct gl_tnl_module TnlModule;
3035
3036    /**
3037     * \name Hooks for module contexts.
3038     *
3039     * These will eventually live in the driver or elsewhere.
3040     */
3041    /*@{*/
3042    void *swrast_context;
3043    void *swsetup_context;
3044    void *swtnl_context;
3045    void *swtnl_im;
3046    void *acache_context;
3047    void *aelt_context;
3048    /*@}*/
3049 };
3050
3051
3052 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
3053 extern const char *_mesa_prim_name[GL_POLYGON+4];
3054
3055
3056 #ifdef DEBUG
3057 extern int MESA_VERBOSE;
3058 extern int MESA_DEBUG_FLAGS;
3059 # define MESA_FUNCTION __FUNCTION__
3060 #else
3061 # define MESA_VERBOSE 0
3062 # define MESA_DEBUG_FLAGS 0
3063 # define MESA_FUNCTION "a function"
3064 # ifndef NDEBUG
3065 #  define NDEBUG
3066 # endif
3067 #endif
3068
3069
3070 enum _verbose
3071 {
3072    VERBOSE_VARRAY               = 0x0001,
3073    VERBOSE_TEXTURE              = 0x0002,
3074    VERBOSE_IMMEDIATE            = 0x0004,
3075    VERBOSE_PIPELINE             = 0x0008,
3076    VERBOSE_DRIVER               = 0x0010,
3077    VERBOSE_STATE                = 0x0020,
3078    VERBOSE_API                  = 0x0040,
3079    VERBOSE_DISPLAY_LIST         = 0x0100,
3080    VERBOSE_LIGHTING             = 0x0200,
3081    VERBOSE_PRIMS                = 0x0400,
3082    VERBOSE_VERTS                = 0x0800,
3083    VERBOSE_DISASSEM             = 0x1000
3084 };
3085
3086
3087 enum _debug
3088 {
3089    DEBUG_ALWAYS_FLUSH           = 0x1
3090 };
3091
3092
3093
3094 #define Elements(x) sizeof(x)/sizeof(*(x))
3095
3096
3097 #endif /* TYPES_H */