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
  11  *
  12  * Copyright (C) 1999-2006  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  * Color channel data type.
  49  */
  50 #if CHAN_BITS == 8
  51    typedef GLubyte GLchan;
  52 #define CHAN_MAX 255
  53 #define CHAN_MAXF 255.0F
  54 #define CHAN_TYPE GL_UNSIGNED_BYTE
  55 #elif CHAN_BITS == 16
  56    typedef GLushort GLchan;
  57 #define CHAN_MAX 65535
  58 #define CHAN_MAXF 65535.0F
  59 #define CHAN_TYPE GL_UNSIGNED_SHORT
  60 #elif CHAN_BITS == 32
  61    typedef GLfloat GLchan;
  62 #define CHAN_MAX 1.0
  63 #define CHAN_MAXF 1.0F
  64 #define CHAN_TYPE GL_FLOAT
  65 #else
  66 #error "illegal number of color channel bits"
  67 #endif
  68
  69
  70 /**
  71  * Stencil buffer data type.
  72  */
  73 #if STENCIL_BITS==8
  74    typedef GLubyte GLstencil;
  75 #elif STENCIL_BITS==16
  76    typedef GLushort GLstencil;
  77 #else
  78 #  error "illegal number of stencil bits"
  79 #endif
  80
  81
  82 /**
  83  * Fixed point data type.
  84  */
  85 typedef int GLfixed;
  86 /*
  87  * Fixed point arithmetic macros
  88  */
  89 #ifndef FIXED_FRAC_BITS
  90 #define FIXED_FRAC_BITS 11
  91 #endif
  92
  93 #define FIXED_SHIFT     FIXED_FRAC_BITS
  94 #define FIXED_ONE       (1 << FIXED_SHIFT)
  95 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
  96 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
  97 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
  98 #define FIXED_EPSILON   1
  99 #define FIXED_SCALE     ((float) FIXED_ONE)
 100 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 101 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 102 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 103 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 104 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 105 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 106 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 107 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 108 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 109 #define PosFloatToFixed(X)      FloatToFixed(X)
 110 #define SignedFloatToFixed(X)   FloatToFixed(X)
 111
 112
 113
 114 /**
 115  * \name Some forward type declarations
 116  */
 117 /*@{*/
 118 struct _mesa_HashTable;
 119 struct gl_pixelstore_attrib;
 120 struct gl_texture_format;
 121 struct gl_texture_image;
 122 struct gl_texture_object;
 123 typedef struct __GLcontextRec GLcontext;
 124 typedef struct __GLcontextModesRec GLvisual;
 125 typedef struct gl_framebuffer GLframebuffer;
 126 /*@}*/
 127
 128
 129
 130 /**
 131  * Indexes for vertex program attributes.
 132  * GL_NV_vertex_program aliases generic attributes over the conventional
 133  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 134  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 135  * generic attributes are distinct/separate).
 136  */
 137 enum
 138 {
 139    VERT_ATTRIB_POS = 0,
 140    VERT_ATTRIB_WEIGHT = 1,
 141    VERT_ATTRIB_NORMAL = 2,
 142    VERT_ATTRIB_COLOR0 = 3,
 143    VERT_ATTRIB_COLOR1 = 4,
 144    VERT_ATTRIB_FOG = 5,
 145    VERT_ATTRIB_COLOR_INDEX = 6,
 146    VERT_ATTRIB_EDGEFLAG = 7,
 147    VERT_ATTRIB_TEX0 = 8,
 148    VERT_ATTRIB_TEX1 = 9,
 149    VERT_ATTRIB_TEX2 = 10,
 150    VERT_ATTRIB_TEX3 = 11,
 151    VERT_ATTRIB_TEX4 = 12,
 152    VERT_ATTRIB_TEX5 = 13,
 153    VERT_ATTRIB_TEX6 = 14,
 154    VERT_ATTRIB_TEX7 = 15,
 155    VERT_ATTRIB_GENERIC0 = 16,
 156    VERT_ATTRIB_GENERIC1 = 17,
 157    VERT_ATTRIB_GENERIC2 = 18,
 158    VERT_ATTRIB_GENERIC3 = 19,
 159    VERT_ATTRIB_GENERIC4 = 20,
 160    VERT_ATTRIB_GENERIC5 = 21,
 161    VERT_ATTRIB_GENERIC6 = 22,
 162    VERT_ATTRIB_GENERIC7 = 23,
 163    VERT_ATTRIB_GENERIC8 = 24,
 164    VERT_ATTRIB_GENERIC9 = 25,
 165    VERT_ATTRIB_GENERIC10 = 26,
 166    VERT_ATTRIB_GENERIC11 = 27,
 167    VERT_ATTRIB_GENERIC12 = 28,
 168    VERT_ATTRIB_GENERIC13 = 29,
 169    VERT_ATTRIB_GENERIC14 = 30,
 170    VERT_ATTRIB_GENERIC15 = 31,
 171    VERT_ATTRIB_MAX = 32
 172 };
 173
 174 /**
 175  * Bitflags for vertex attributes.
 176  * These are used in bitfields in many places.
 177  */
 178 /*@{*/
 179 #define VERT_BIT_POS         (1 << VERT_ATTRIB_POS)
 180 #define VERT_BIT_WEIGHT      (1 << VERT_ATTRIB_WEIGHT)
 181 #define VERT_BIT_NORMAL      (1 << VERT_ATTRIB_NORMAL)
 182 #define VERT_BIT_COLOR0      (1 << VERT_ATTRIB_COLOR0)
 183 #define VERT_BIT_COLOR1      (1 << VERT_ATTRIB_COLOR1)
 184 #define VERT_BIT_FOG         (1 << VERT_ATTRIB_FOG)
 185 #define VERT_BIT_COLOR_INDEX (1 << VERT_ATTRIB_COLOR_INDEX)
 186 #define VERT_BIT_EDGEFLAG    (1 << VERT_ATTRIB_EDGEFLAG)
 187 #define VERT_BIT_TEX0        (1 << VERT_ATTRIB_TEX0)
 188 #define VERT_BIT_TEX1        (1 << VERT_ATTRIB_TEX1)
 189 #define VERT_BIT_TEX2        (1 << VERT_ATTRIB_TEX2)
 190 #define VERT_BIT_TEX3        (1 << VERT_ATTRIB_TEX3)
 191 #define VERT_BIT_TEX4        (1 << VERT_ATTRIB_TEX4)
 192 #define VERT_BIT_TEX5        (1 << VERT_ATTRIB_TEX5)
 193 #define VERT_BIT_TEX6        (1 << VERT_ATTRIB_TEX6)
 194 #define VERT_BIT_TEX7        (1 << VERT_ATTRIB_TEX7)
 195 #define VERT_BIT_GENERIC0    (1 << VERT_ATTRIB_GENERIC0)
 196 #define VERT_BIT_GENERIC1    (1 << VERT_ATTRIB_GENERIC1)
 197 #define VERT_BIT_GENERIC2    (1 << VERT_ATTRIB_GENERIC2)
 198 #define VERT_BIT_GENERIC3    (1 << VERT_ATTRIB_GENERIC3)
 199 #define VERT_BIT_GENERIC4    (1 << VERT_ATTRIB_GENERIC4)
 200 #define VERT_BIT_GENERIC5    (1 << VERT_ATTRIB_GENERIC5)
 201 #define VERT_BIT_GENERIC6    (1 << VERT_ATTRIB_GENERIC6)
 202 #define VERT_BIT_GENERIC7    (1 << VERT_ATTRIB_GENERIC7)
 203 #define VERT_BIT_GENERIC8    (1 << VERT_ATTRIB_GENERIC8)
 204 #define VERT_BIT_GENERIC9    (1 << VERT_ATTRIB_GENERIC9)
 205 #define VERT_BIT_GENERIC10   (1 << VERT_ATTRIB_GENERIC10)
 206 #define VERT_BIT_GENERIC11   (1 << VERT_ATTRIB_GENERIC11)
 207 #define VERT_BIT_GENERIC12   (1 << VERT_ATTRIB_GENERIC12)
 208 #define VERT_BIT_GENERIC13   (1 << VERT_ATTRIB_GENERIC13)
 209 #define VERT_BIT_GENERIC14   (1 << VERT_ATTRIB_GENERIC14)
 210 #define VERT_BIT_GENERIC15   (1 << VERT_ATTRIB_GENERIC15)
 211
 212 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 213 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 214 /*@}*/
 215
 216 /**
 217  * GLSL allows shader writers to allocate vertex result attributes (varyings) in
 218  * single float component granularity. This is in contrast to vertex / fragment
 219  * programs, where result attributes (actually texcoords) were allocated
 220  * in 4-component vectors of floats granularity.
 221  * For performance reasons, it would be optimal to stick with this scheme on a scalar
 222  * processor. Varyings will likely be allocated as 3-component vectors, so statistically
 223  * we win 2 floats.
 224  * The constant VARYINGS_PER_VECTOR tells us how much of float components we pack into
 225  * one result vector. For scalar processor it would be 1, for vector processor - 4.
 226  *
 227  * NOTE: Currently we pack varyings into vertex attributes.
 228  */
 229 #define VARYINGS_PER_VECTOR 2
 230 #define VARYING_EMIT_STYLE  EMIT_2F
 231 #define MAX_VARYING_VECTORS ((MAX_VARYING_FLOATS + VARYINGS_PER_VECTOR - 1) / VARYINGS_PER_VECTOR)
 232
 233 /**
 234  * Indexes for vertex program result attributes
 235  */
 236 /*@{*/
 237 #define VERT_RESULT_HPOS 0
 238 #define VERT_RESULT_COL0 1
 239 #define VERT_RESULT_COL1 2
 240 #define VERT_RESULT_FOGC 3
 241 #define VERT_RESULT_TEX0 4
 242 #define VERT_RESULT_TEX1 5
 243 #define VERT_RESULT_TEX2 6
 244 #define VERT_RESULT_TEX3 7
 245 #define VERT_RESULT_TEX4 8
 246 #define VERT_RESULT_TEX5 9
 247 #define VERT_RESULT_TEX6 10
 248 #define VERT_RESULT_TEX7 11
 249 #define VERT_RESULT_PSIZ 12
 250 #define VERT_RESULT_BFC0 13
 251 #define VERT_RESULT_BFC1 14
 252 #define VERT_RESULT_EDGE 15
 253 #define VERT_RESULT_MAX  16
 254 /*@}*/
 255
 256
 257 /**
 258  * Indexes for fragment program input attributes.
 259  */
 260 enum
 261 {
 262    FRAG_ATTRIB_WPOS = 0,
 263    FRAG_ATTRIB_COL0 = 1,
 264    FRAG_ATTRIB_COL1 = 2,
 265    FRAG_ATTRIB_FOGC = 3,
 266    FRAG_ATTRIB_TEX0 = 4,
 267    FRAG_ATTRIB_TEX1 = 5,
 268    FRAG_ATTRIB_TEX2 = 6,
 269    FRAG_ATTRIB_TEX3 = 7,
 270    FRAG_ATTRIB_TEX4 = 8,
 271    FRAG_ATTRIB_TEX5 = 9,
 272    FRAG_ATTRIB_TEX6 = 10,
 273    FRAG_ATTRIB_TEX7 = 11,
 274    FRAG_ATTRIB_MAX = 12
 275 };
 276
 277 /**
 278  * Bitflags for fragment program input attributes.
 279  */
 280 /*@{*/
 281 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 282 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 283 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 284 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 285 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 286 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 287 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 288 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 289 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 290 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 291 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 292 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 293
 294 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 295                            FRAG_BIT_TEX1|       \
 296                            FRAG_BIT_TEX2|       \
 297                            FRAG_BIT_TEX3|       \
 298                            FRAG_BIT_TEX4|       \
 299                            FRAG_BIT_TEX5|       \
 300                            FRAG_BIT_TEX6|       \
 301                            FRAG_BIT_TEX7)
 302 /*@}*/
 303
 304
 305 /**
 306  * Fragment program results
 307  */
 308 /*@{*/
 309 #define FRAG_RESULT_COLR  0
 310 #define FRAG_RESULT_COLH  1
 311 #define FRAG_RESULT_DEPR  2
 312 #define FRAG_RESULT_MAX   3
 313 /*@}*/
 314
 315
 316 /**
 317  * Indexes for all renderbuffers
 318  */
 319 enum {
 320    BUFFER_FRONT_LEFT  = 0,  /* the four standard color buffers */
 321    BUFFER_BACK_LEFT   = 1,
 322    BUFFER_FRONT_RIGHT = 2,
 323    BUFFER_BACK_RIGHT  = 3,
 324    BUFFER_AUX0        = 4,  /* optional aux buffer */
 325    BUFFER_AUX1        = 5,
 326    BUFFER_AUX2        = 6,
 327    BUFFER_AUX3        = 7,
 328    BUFFER_DEPTH       = 8,
 329    BUFFER_STENCIL     = 9,
 330    BUFFER_ACCUM       = 10,
 331    BUFFER_COLOR0      = 11, /* generic renderbuffers */
 332    BUFFER_COLOR1      = 12,
 333    BUFFER_COLOR2      = 13,
 334    BUFFER_COLOR3      = 14,
 335    BUFFER_COLOR4      = 15,
 336    BUFFER_COLOR5      = 16,
 337    BUFFER_COLOR6      = 17,
 338    BUFFER_COLOR7      = 18,
 339    BUFFER_COUNT       = 19
 340 };
 341
 342 /**
 343  * Bit flags for all renderbuffers
 344  */
 345 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 346 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 347 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 348 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 349 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 350 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 351 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 352 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 353 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 354 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 355 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 356 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 357 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 358 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 359 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 360 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 361 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 362 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 363 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 364
 365 /**
 366  * Mask of all the color buffer bits (but not accum).
 367  */
 368 #define BUFFER_BITS_COLOR  (BUFFER_BIT_FRONT_LEFT | \
 369                             BUFFER_BIT_BACK_LEFT | \
 370                             BUFFER_BIT_FRONT_RIGHT | \
 371                             BUFFER_BIT_BACK_RIGHT | \
 372                             BUFFER_BIT_AUX0 | \
 373                             BUFFER_BIT_AUX1 | \
 374                             BUFFER_BIT_AUX2 | \
 375                             BUFFER_BIT_AUX3 | \
 376                             BUFFER_BIT_COLOR0 | \
 377                             BUFFER_BIT_COLOR1 | \
 378                             BUFFER_BIT_COLOR2 | \
 379                             BUFFER_BIT_COLOR3 | \
 380                             BUFFER_BIT_COLOR4 | \
 381                             BUFFER_BIT_COLOR5 | \
 382                             BUFFER_BIT_COLOR6 | \
 383                             BUFFER_BIT_COLOR7)
 384
 385
 386
 387
 388 /**
 389  * Data structure for color tables
 390  */
 391 struct gl_color_table
 392 {
 393    GLenum InternalFormat;      /**< The user-specified format */
 394    GLenum _BaseFormat;         /**< GL_ALPHA, GL_RGBA, GL_RGB, etc */
 395    GLuint Size;                /**< number of entries in table */
 396    GLfloat *TableF;            /**< Color table, floating point values */
 397    GLubyte *TableUB;           /**< Color table, ubyte values */
 398    GLubyte RedSize;
 399    GLubyte GreenSize;
 400    GLubyte BlueSize;
 401    GLubyte AlphaSize;
 402    GLubyte LuminanceSize;
 403    GLubyte IntensitySize;
 404 };
 405
 406
 407 /**
 408  * \name Bit flags used for updating material values.
 409  */
 410 /*@{*/
 411 #define MAT_ATTRIB_FRONT_AMBIENT           0
 412 #define MAT_ATTRIB_BACK_AMBIENT            1
 413 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 414 #define MAT_ATTRIB_BACK_DIFFUSE            3
 415 #define MAT_ATTRIB_FRONT_SPECULAR          4
 416 #define MAT_ATTRIB_BACK_SPECULAR           5
 417 #define MAT_ATTRIB_FRONT_EMISSION          6
 418 #define MAT_ATTRIB_BACK_EMISSION           7
 419 #define MAT_ATTRIB_FRONT_SHININESS         8
 420 #define MAT_ATTRIB_BACK_SHININESS          9
 421 #define MAT_ATTRIB_FRONT_INDEXES           10
 422 #define MAT_ATTRIB_BACK_INDEXES            11
 423 #define MAT_ATTRIB_MAX                     12
 424
 425 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 426 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 427 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 428 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 429 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 430 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 431
 432 #define MAT_INDEX_AMBIENT  0
 433 #define MAT_INDEX_DIFFUSE  1
 434 #define MAT_INDEX_SPECULAR 2
 435
 436 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 437 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 438 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 439 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 440 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 441 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 442 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 443 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 444 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 445 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 446 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 447 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 448
 449
 450 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 451                                  MAT_BIT_FRONT_AMBIENT |        \
 452                                  MAT_BIT_FRONT_DIFFUSE |        \
 453                                  MAT_BIT_FRONT_SPECULAR |       \
 454                                  MAT_BIT_FRONT_SHININESS |      \
 455                                  MAT_BIT_FRONT_INDEXES)
 456
 457 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 458                                  MAT_BIT_BACK_AMBIENT |         \
 459                                  MAT_BIT_BACK_DIFFUSE |         \
 460                                  MAT_BIT_BACK_SPECULAR |        \
 461                                  MAT_BIT_BACK_SHININESS |       \
 462                                  MAT_BIT_BACK_INDEXES)
 463
 464 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 465 /*@}*/
 466
 467
 468 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 469 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 470
 471 /**
 472  * Material shininess lookup table.
 473  */
 474 struct gl_shine_tab
 475 {
 476    struct gl_shine_tab *next, *prev;
 477    GLfloat tab[SHINE_TABLE_SIZE+1];
 478    GLfloat shininess;
 479    GLuint refcount;
 480 };
 481
 482
 483 /**
 484  * Light source state.
 485  */
 486 struct gl_light
 487 {
 488    struct gl_light *next;       /**< double linked list with sentinel */
 489    struct gl_light *prev;
 490
 491    GLfloat Ambient[4];          /**< ambient color */
 492    GLfloat Diffuse[4];          /**< diffuse color */
 493    GLfloat Specular[4];         /**< specular color */
 494    GLfloat EyePosition[4];      /**< position in eye coordinates */
 495    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 496    GLfloat SpotExponent;
 497    GLfloat SpotCutoff;          /**< in degrees */
 498    GLfloat _CosCutoffNeg;       /**< = cos(SpotCutoff) */
 499    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 500    GLfloat ConstantAttenuation;
 501    GLfloat LinearAttenuation;
 502    GLfloat QuadraticAttenuation;
 503    GLboolean Enabled;           /**< On/off flag */
 504
 505    /**
 506     * \name Derived fields
 507     */
 508    /*@{*/
 509    GLbitfield _Flags;           /**< State */
 510
 511    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 512    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 513    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 514    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 515    GLfloat _VP_inf_spot_attenuation;
 516
 517    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 518    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 519    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 520    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 521    GLfloat _dli;                /**< CI diffuse light intensity */
 522    GLfloat _sli;                /**< CI specular light intensity */
 523    /*@}*/
 524 };
 525
 526
 527 /**
 528  * Light model state.
 529  */
 530 struct gl_lightmodel
 531 {
 532    GLfloat Ambient[4];          /**< ambient color */
 533    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 534    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 535    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 536                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 537 };
 538
 539
 540 /**
 541  * Material state.
 542  */
 543 struct gl_material
 544 {
 545    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 546 };
 547
 548
 549 /**
 550  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 551  */
 552 struct gl_accum_attrib
 553 {
 554    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 555 };
 556
 557
 558 /**
 559  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 560  */
 561 struct gl_colorbuffer_attrib
 562 {
 563    GLuint ClearIndex;                   /**< Index to use for glClear */
 564    GLclampf ClearColor[4];              /**< Color to use for glClear */
 565
 566    GLuint IndexMask;                    /**< Color index write mask */
 567    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 568
 569    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 570
 571    /**
 572     * \name alpha testing
 573     */
 574    /*@{*/
 575    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 576    GLenum AlphaFunc;                    /**< Alpha test function */
 577    GLclampf AlphaRef;                   /**< Alpha reference value */
 578    /*@}*/
 579
 580    /**
 581     * \name Blending
 582     */
 583    /*@{*/
 584    GLboolean BlendEnabled;              /**< Blending enabled flag */
 585    GLenum BlendSrcRGB;                  /**< Blending source operator */
 586    GLenum BlendDstRGB;                  /**< Blending destination operator */
 587    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 588    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 589    GLenum BlendEquationRGB;             /**< Blending equation */
 590    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 591    GLfloat BlendColor[4];               /**< Blending color */
 592    /*@}*/
 593
 594    /**
 595     * \name Logic op
 596     */
 597    /*@{*/
 598    GLenum LogicOp;                      /**< Logic operator */
 599    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 600    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 601    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 602    /*@}*/
 603
 604    GLboolean DitherFlag;                /**< Dither enable flag */
 605
 606    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 607    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 608 };
 609
 610
 611 /**
 612  * Current attribute group (GL_CURRENT_BIT).
 613  */
 614 struct gl_current_attrib
 615 {
 616    /**
 617     * \name Current vertex attributes.
 618     * \note Values are valid only after FLUSH_VERTICES has been called.
 619     * \note Index and Edgeflag current values are stored as floats in the
 620     * SIX and SEVEN attribute slots.
 621     */
 622    /*@{*/
 623    GLfloat Attrib[VERT_ATTRIB_MAX][4];  /**< Position, color, texcoords, etc */
 624    /*@}*/
 625
 626    /**
 627     * \name Current raster position attributes (always valid).
 628     * \note This set of attributes is very similar to the SWvertex struct.
 629     */
 630    /*@{*/
 631    GLfloat RasterPos[4];
 632    GLfloat RasterDistance;
 633    GLfloat RasterColor[4];
 634    GLfloat RasterSecondaryColor[4];
 635    GLfloat RasterIndex;
 636    GLfloat RasterTexCoords[MAX_TEXTURE_COORD_UNITS][4];
 637    GLboolean RasterPosValid;
 638    /*@}*/
 639 };
 640
 641
 642 /**
 643  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 644  */
 645 struct gl_depthbuffer_attrib
 646 {
 647    GLenum Func;                 /**< Function for depth buffer compare */
 648    GLclampd Clear;              /**< Value to clear depth buffer to */
 649    GLboolean Test;              /**< Depth buffering enabled flag */
 650    GLboolean Mask;              /**< Depth buffer writable? */
 651    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 652    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 653 };
 654
 655
 656 /**
 657  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
 658  */
 659 struct gl_enable_attrib
 660 {
 661    GLboolean AlphaTest;
 662    GLboolean AutoNormal;
 663    GLboolean Blend;
 664    GLbitfield ClipPlanes;
 665    GLboolean ColorMaterial;
 666    GLboolean ColorTable;                /* SGI_color_table */
 667    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 668    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 669    GLboolean Convolution1D;
 670    GLboolean Convolution2D;
 671    GLboolean Separable2D;
 672    GLboolean CullFace;
 673    GLboolean DepthTest;
 674    GLboolean Dither;
 675    GLboolean Fog;
 676    GLboolean Histogram;
 677    GLboolean Light[MAX_LIGHTS];
 678    GLboolean Lighting;
 679    GLboolean LineSmooth;
 680    GLboolean LineStipple;
 681    GLboolean IndexLogicOp;
 682    GLboolean ColorLogicOp;
 683    GLboolean Map1Color4;
 684    GLboolean Map1Index;
 685    GLboolean Map1Normal;
 686    GLboolean Map1TextureCoord1;
 687    GLboolean Map1TextureCoord2;
 688    GLboolean Map1TextureCoord3;
 689    GLboolean Map1TextureCoord4;
 690    GLboolean Map1Vertex3;
 691    GLboolean Map1Vertex4;
 692    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 693    GLboolean Map2Color4;
 694    GLboolean Map2Index;
 695    GLboolean Map2Normal;
 696    GLboolean Map2TextureCoord1;
 697    GLboolean Map2TextureCoord2;
 698    GLboolean Map2TextureCoord3;
 699    GLboolean Map2TextureCoord4;
 700    GLboolean Map2Vertex3;
 701    GLboolean Map2Vertex4;
 702    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 703    GLboolean MinMax;
 704    GLboolean Normalize;
 705    GLboolean PixelTexture;
 706    GLboolean PointSmooth;
 707    GLboolean PolygonOffsetPoint;
 708    GLboolean PolygonOffsetLine;
 709    GLboolean PolygonOffsetFill;
 710    GLboolean PolygonSmooth;
 711    GLboolean PolygonStipple;
 712    GLboolean RescaleNormals;
 713    GLboolean Scissor;
 714    GLboolean Stencil;
 715    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 716    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 717    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 718    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 719    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 720    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 721    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 722    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 723    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 724    /* SGI_texture_color_table */
 725    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 726    /* GL_ARB_vertex_program / GL_NV_vertex_program */
 727    GLboolean VertexProgram;
 728    GLboolean VertexProgramPointSize;
 729    GLboolean VertexProgramTwoSide;
 730    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 731    GLboolean PointSprite;
 732    GLboolean FragmentShaderATI;
 733 };
 734
 735
 736 /**
 737  * Evaluator attribute group (GL_EVAL_BIT).
 738  */
 739 struct gl_eval_attrib
 740 {
 741    /**
 742     * \name Enable bits
 743     */
 744    /*@{*/
 745    GLboolean Map1Color4;
 746    GLboolean Map1Index;
 747    GLboolean Map1Normal;
 748    GLboolean Map1TextureCoord1;
 749    GLboolean Map1TextureCoord2;
 750    GLboolean Map1TextureCoord3;
 751    GLboolean Map1TextureCoord4;
 752    GLboolean Map1Vertex3;
 753    GLboolean Map1Vertex4;
 754    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 755    GLboolean Map2Color4;
 756    GLboolean Map2Index;
 757    GLboolean Map2Normal;
 758    GLboolean Map2TextureCoord1;
 759    GLboolean Map2TextureCoord2;
 760    GLboolean Map2TextureCoord3;
 761    GLboolean Map2TextureCoord4;
 762    GLboolean Map2Vertex3;
 763    GLboolean Map2Vertex4;
 764    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 765    GLboolean AutoNormal;
 766    /*@}*/
 767
 768    /**
 769     * \name Map Grid endpoints and divisions and calculated du values
 770     */
 771    /*@{*/
 772    GLint MapGrid1un;
 773    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 774    GLint MapGrid2un, MapGrid2vn;
 775    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 776    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 777    /*@}*/
 778 };
 779
 780
 781 /**
 782  * Fog attribute group (GL_FOG_BIT).
 783  */
 784 struct gl_fog_attrib
 785 {
 786    GLboolean Enabled;           /**< Fog enabled flag */
 787    GLfloat Color[4];            /**< Fog color */
 788    GLfloat Density;             /**< Density >= 0.0 */
 789    GLfloat Start;               /**< Start distance in eye coords */
 790    GLfloat End;                 /**< End distance in eye coords */
 791    GLfloat Index;               /**< Fog index */
 792    GLenum Mode;                 /**< Fog mode */
 793    GLboolean ColorSumEnabled;
 794    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 795    GLfloat _Scale;              /**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
 796 };
 797
 798
 799 /**
 800  * Hint attribute group (GL_HINT_BIT).
 801  *
 802  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 803  */
 804 struct gl_hint_attrib
 805 {
 806    GLenum PerspectiveCorrection;
 807    GLenum PointSmooth;
 808    GLenum LineSmooth;
 809    GLenum PolygonSmooth;
 810    GLenum Fog;
 811    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 812    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 813    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 814    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 815 };
 816
 817
 818 /**
 819  * Histogram attributes.
 820  */
 821 struct gl_histogram_attrib
 822 {
 823    GLuint Width;                                /**< number of table entries */
 824    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 825    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 826    GLboolean Sink;                              /**< terminate image transfer? */
 827    GLubyte RedSize;                             /**< Bits per counter */
 828    GLubyte GreenSize;
 829    GLubyte BlueSize;
 830    GLubyte AlphaSize;
 831    GLubyte LuminanceSize;
 832 };
 833
 834
 835 /**
 836  * Color Min/max state.
 837  */
 838 struct gl_minmax_attrib
 839 {
 840    GLenum Format;
 841    GLboolean Sink;
 842    GLfloat Min[4], Max[4];   /**< RGBA */
 843 };
 844
 845
 846 /**
 847  * Image convolution state.
 848  */
 849 struct gl_convolution_attrib
 850 {
 851    GLenum Format;
 852    GLenum InternalFormat;
 853    GLuint Width;
 854    GLuint Height;
 855    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 856 };
 857
 858
 859 /**
 860  * Light state flags.
 861  */
 862 /*@{*/
 863 #define LIGHT_SPOT         0x1
 864 #define LIGHT_LOCAL_VIEWER 0x2
 865 #define LIGHT_POSITIONAL   0x4
 866 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 867 /*@}*/
 868
 869
 870 /**
 871  * Lighting attribute group (GL_LIGHT_BIT).
 872  */
 873 struct gl_light_attrib
 874 {
 875    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 876    struct gl_lightmodel Model;          /**< Lighting model */
 877
 878    /**
 879     * Must flush FLUSH_VERTICES before referencing:
 880     */
 881    /*@{*/
 882    struct gl_material Material;         /**< Includes front & back values */
 883    /*@}*/
 884
 885    GLboolean Enabled;                   /**< Lighting enabled flag */
 886    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 887    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 888    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 889    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 890    GLboolean ColorMaterialEnabled;
 891    GLenum ClampVertexColor;
 892
 893    struct gl_light EnabledList;         /**< List sentinel */
 894
 895    /**
 896     * Derived state for optimizations:
 897     */
 898    /*@{*/
 899    GLboolean _NeedEyeCoords;
 900    GLboolean _NeedVertices;             /**< Use fast shader? */
 901    GLbitfield  _Flags;                  /**< LIGHT_* flags, see above */
 902    GLfloat _BaseColor[2][3];
 903    /*@}*/
 904 };
 905
 906
 907 /**
 908  * Line attribute group (GL_LINE_BIT).
 909  */
 910 struct gl_line_attrib
 911 {
 912    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 913    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 914    GLushort StipplePattern;     /**< Stipple pattern */
 915    GLint StippleFactor;         /**< Stipple repeat factor */
 916    GLfloat Width;               /**< Line width */
 917    GLfloat _Width;              /**< Clamped Line width */
 918 };
 919
 920
 921 /**
 922  * Display list attribute group (GL_LIST_BIT).
 923  */
 924 struct gl_list_attrib
 925 {
 926    GLuint ListBase;
 927 };
 928
 929
 930 /**
 931  * Used by device drivers to hook new commands into display lists.
 932  */
 933 struct gl_list_instruction
 934 {
 935    GLuint Size;
 936    void (*Execute)( GLcontext *ctx, void *data );
 937    void (*Destroy)( GLcontext *ctx, void *data );
 938    void (*Print)( GLcontext *ctx, void *data );
 939 };
 940
 941 #define MAX_DLIST_EXT_OPCODES 16
 942
 943 /**
 944  * Used by device drivers to hook new commands into display lists.
 945  */
 946 struct gl_list_extensions
 947 {
 948    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 949    GLuint NumOpcodes;
 950 };
 951
 952
 953 /**
 954  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 955  */
 956 struct gl_multisample_attrib
 957 {
 958    GLboolean Enabled;
 959    GLboolean SampleAlphaToCoverage;
 960    GLboolean SampleAlphaToOne;
 961    GLboolean SampleCoverage;
 962    GLfloat SampleCoverageValue;
 963    GLboolean SampleCoverageInvert;
 964 };
 965
 966
 967 /**
 968  * Pixel attribute group (GL_PIXEL_MODE_BIT).
 969  */
 970 struct gl_pixel_attrib
 971 {
 972    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
 973    GLfloat RedBias, RedScale;
 974    GLfloat GreenBias, GreenScale;
 975    GLfloat BlueBias, BlueScale;
 976    GLfloat AlphaBias, AlphaScale;
 977    GLfloat DepthBias, DepthScale;
 978    GLint IndexShift, IndexOffset;
 979    GLboolean MapColorFlag;
 980    GLboolean MapStencilFlag;
 981    GLfloat ZoomX, ZoomY;
 982    /* XXX move these out of gl_pixel_attrib */
 983    GLint MapStoSsize;           /**< Size of each pixel map */
 984    GLint MapItoIsize;
 985    GLint MapItoRsize;
 986    GLint MapItoGsize;
 987    GLint MapItoBsize;
 988    GLint MapItoAsize;
 989    GLint MapRtoRsize;
 990    GLint MapGtoGsize;
 991    GLint MapBtoBsize;
 992    GLint MapAtoAsize;
 993    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 994    GLfloat MapItoI[MAX_PIXEL_MAP_TABLE];
 995    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 996    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 997    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 998    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 999    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
1000    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
1001    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
1002    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
1003    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
1004    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
1005    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
1006    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
1007    /** GL_EXT_histogram */
1008    GLboolean HistogramEnabled;
1009    GLboolean MinMaxEnabled;
1010    /** GL_SGI_color_matrix */
1011    GLfloat PostColorMatrixScale[4];  /**< RGBA */
1012    GLfloat PostColorMatrixBias[4];   /**< RGBA */
1013    /** GL_SGI_color_table */
1014    GLfloat ColorTableScale[4];
1015    GLfloat ColorTableBias[4];
1016    GLboolean ColorTableEnabled;
1017    GLfloat PCCTscale[4];
1018    GLfloat PCCTbias[4];
1019    GLboolean PostConvolutionColorTableEnabled;
1020    GLfloat PCMCTscale[4];
1021    GLfloat PCMCTbias[4];
1022    GLboolean PostColorMatrixColorTableEnabled;
1023    /** GL_SGI_texture_color_table */
1024    GLfloat TextureColorTableScale[4];
1025    GLfloat TextureColorTableBias[4];
1026    /** Convolution */
1027    GLboolean Convolution1DEnabled;
1028    GLboolean Convolution2DEnabled;
1029    GLboolean Separable2DEnabled;
1030    GLfloat ConvolutionBorderColor[3][4];
1031    GLenum ConvolutionBorderMode[3];
1032    GLfloat ConvolutionFilterScale[3][4];
1033    GLfloat ConvolutionFilterBias[3][4];
1034    GLfloat PostConvolutionScale[4];  /**< RGBA */
1035    GLfloat PostConvolutionBias[4];   /**< RGBA */
1036 };
1037
1038
1039 /**
1040  * Point attribute group (GL_POINT_BIT).
1041  */
1042 struct gl_point_attrib
1043 {
1044    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1045    GLfloat Size;                /**< User-specified point size */
1046    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
1047    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1048    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1049    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1050    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1051    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
1052    GLboolean CoordReplace[MAX_TEXTURE_COORD_UNITS]; /**< GL_ARB_point_sprite */
1053    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1054    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1055 };
1056
1057
1058 /**
1059  * Polygon attribute group (GL_POLYGON_BIT).
1060  */
1061 struct gl_polygon_attrib
1062 {
1063    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1064    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1065    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1066    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1067    GLboolean CullFlag;          /**< Culling on/off flag */
1068    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1069    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1070    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1071    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1072    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1073    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1074    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1075    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1076 };
1077
1078
1079 /**
1080  * Scissor attributes (GL_SCISSOR_BIT).
1081  */
1082 struct gl_scissor_attrib
1083 {
1084    GLboolean Enabled;           /**< Scissor test enabled? */
1085    GLint X, Y;                  /**< Lower left corner of box */
1086    GLsizei Width, Height;       /**< Size of box */
1087 };
1088
1089
1090 /**
1091  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1092  */
1093 struct gl_stencil_attrib
1094 {
1095    GLboolean Enabled;           /**< Enabled flag */
1096    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1097    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1098    GLboolean _TestTwoSide;
1099    GLenum Function[2];          /**< Stencil function */
1100    GLenum FailFunc[2];          /**< Fail function */
1101    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1102    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1103    GLint Ref[2];                /**< Reference value */
1104    GLuint ValueMask[2];         /**< Value mask */
1105    GLuint WriteMask[2];         /**< Write mask */
1106    GLuint Clear;                /**< Clear value */
1107 };
1108
1109
1110 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
1111
1112 /**
1113  * An index for each type of texture object
1114  */
1115 /*@{*/
1116 #define TEXTURE_1D_INDEX    0
1117 #define TEXTURE_2D_INDEX    1
1118 #define TEXTURE_3D_INDEX    2
1119 #define TEXTURE_CUBE_INDEX  3
1120 #define TEXTURE_RECT_INDEX  4
1121 /*@}*/
1122
1123 /**
1124  * Bit flags for each type of texture object
1125  * Used for Texture.Unit[]._ReallyEnabled flags.
1126  */
1127 /*@{*/
1128 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
1129 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
1130 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
1131 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
1132 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
1133 /*@}*/
1134
1135
1136 /**
1137  * TexGenEnabled flags.
1138  */
1139 /*@{*/
1140 #define S_BIT 1
1141 #define T_BIT 2
1142 #define R_BIT 4
1143 #define Q_BIT 8
1144 /*@}*/
1145
1146
1147 /**
1148  * Bit flag versions of the corresponding GL_ constants.
1149  */
1150 /*@{*/
1151 #define TEXGEN_SPHERE_MAP        0x1
1152 #define TEXGEN_OBJ_LINEAR        0x2
1153 #define TEXGEN_EYE_LINEAR        0x4
1154 #define TEXGEN_REFLECTION_MAP_NV 0x8
1155 #define TEXGEN_NORMAL_MAP_NV     0x10
1156
1157 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1158                                   TEXGEN_REFLECTION_MAP_NV | \
1159                                   TEXGEN_NORMAL_MAP_NV)
1160 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1161                                   TEXGEN_REFLECTION_MAP_NV | \
1162                                   TEXGEN_NORMAL_MAP_NV     | \
1163                                   TEXGEN_EYE_LINEAR)
1164 /*@}*/
1165
1166
1167 /* A selection of state flags to make driver and module's lives easier. */
1168 #define ENABLE_TEXGEN0        0x1
1169 #define ENABLE_TEXGEN1        0x2
1170 #define ENABLE_TEXGEN2        0x4
1171 #define ENABLE_TEXGEN3        0x8
1172 #define ENABLE_TEXGEN4        0x10
1173 #define ENABLE_TEXGEN5        0x20
1174 #define ENABLE_TEXGEN6        0x40
1175 #define ENABLE_TEXGEN7        0x80
1176
1177 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1178 #define ENABLE_TEXMAT1        0x2
1179 #define ENABLE_TEXMAT2        0x4
1180 #define ENABLE_TEXMAT3        0x8
1181 #define ENABLE_TEXMAT4        0x10
1182 #define ENABLE_TEXMAT5        0x20
1183 #define ENABLE_TEXMAT6        0x40
1184 #define ENABLE_TEXMAT7        0x80
1185
1186 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1187 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1188
1189
1190 /**
1191  * Texel fetch function prototype.  We use texel fetch functions to
1192  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1193  * texture images.  These functions help to isolate us from the gritty
1194  * details of all the various texture image encodings.
1195  *
1196  * \param texImage texture image.
1197  * \param col texel column.
1198  * \param row texel row.
1199  * \param img texel image level/layer.
1200  * \param texelOut output texel (up to 4 GLchans)
1201  */
1202 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1203                                  GLint col, GLint row, GLint img,
1204                                  GLchan *texelOut );
1205
1206 /**
1207  * As above, but returns floats.
1208  * Used for depth component images and for upcoming signed/float
1209  * texture images.
1210  */
1211 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1212                                  GLint col, GLint row, GLint img,
1213                                  GLfloat *texelOut );
1214
1215
1216 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1217                                GLint col, GLint row, GLint img,
1218                                const void *texel);
1219
1220
1221 /**
1222  * This macro defines the (many) parameters to the texstore functions.
1223  * \param dims  either 1 or 2 or 3
1224  * \param baseInternalFormat  user-specified base internal format
1225  * \param dstFormat  destination Mesa texture format
1226  * \param dstAddr  destination image address
1227  * \param dstX/Y/Zoffset  destination x/y/z offset (ala TexSubImage), in texels
1228  * \param dstRowStride  destination image row stride, in bytes
1229  * \param dstImageOffsets  offset of each 2D slice within 3D texture, in texels
1230  * \param srcWidth/Height/Depth  source image size, in pixels
1231  * \param srcFormat  incoming image format
1232  * \param srcType  incoming image data type
1233  * \param srcAddr  source image address
1234  * \param srcPacking  source image packing parameters
1235  */
1236 #define TEXSTORE_PARAMS \
1237         GLcontext *ctx, GLuint dims, \
1238         GLenum baseInternalFormat, \
1239         const struct gl_texture_format *dstFormat, \
1240         GLvoid *dstAddr, \
1241         GLint dstXoffset, GLint dstYoffset, GLint dstZoffset, \
1242         GLint dstRowStride, const GLuint *dstImageOffsets, \
1243         GLint srcWidth, GLint srcHeight, GLint srcDepth, \
1244         GLenum srcFormat, GLenum srcType, \
1245         const GLvoid *srcAddr, \
1246         const struct gl_pixelstore_attrib *srcPacking
1247
1248
1249
1250 /**
1251  * Texture image storage function.
1252  */
1253 typedef GLboolean (*StoreTexImageFunc)(TEXSTORE_PARAMS);
1254
1255
1256 /**
1257  * Texture format record
1258  */
1259 struct gl_texture_format
1260 {
1261    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1262
1263    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1264                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1265                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1266                                  *   GL_DEPTH_COMPONENT.
1267                                  */
1268    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1269    GLubyte RedBits;             /**< Bits per texel component */
1270    GLubyte GreenBits;           /**< These are just rough approximations for */
1271    GLubyte BlueBits;            /**< compressed texture formats. */
1272    GLubyte AlphaBits;
1273    GLubyte LuminanceBits;
1274    GLubyte IntensityBits;
1275    GLubyte IndexBits;
1276    GLubyte DepthBits;
1277    GLubyte StencilBits;         /**< GL_EXT_packed_depth_stencil */
1278
1279    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1280
1281    StoreTexImageFunc StoreImage;
1282
1283    /**
1284     * \name Texel fetch function pointers
1285     */
1286    /*@{*/
1287    FetchTexelFuncC FetchTexel1D;
1288    FetchTexelFuncC FetchTexel2D;
1289    FetchTexelFuncC FetchTexel3D;
1290    FetchTexelFuncF FetchTexel1Df;
1291    FetchTexelFuncF FetchTexel2Df;
1292    FetchTexelFuncF FetchTexel3Df;
1293    /*@}*/
1294
1295    StoreTexelFunc StoreTexel;
1296 };
1297
1298
1299 #define MAX_3D_TEXTURE_SIZE (1 << (MAX_3D_TEXTURE_LEVELS - 1))
1300
1301 /**
1302  * Texture image state.  Describes the dimensions of a texture image,
1303  * the texel format and pointers to Texel Fetch functions.
1304  */
1305 struct gl_texture_image
1306 {
1307    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1308                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1309                                  *   GL_INTENSITY, GL_COLOR_INDEX,
1310                                  *   GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT
1311                                  *   only. Used for choosing TexEnv arithmetic.
1312                                  */
1313    GLint InternalFormat;        /**< Internal format as given by the user */
1314    GLuint Border;               /**< 0 or 1 */
1315    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1316    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1317    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1318    GLuint Width2;               /**< = Width - 2*Border */
1319    GLuint Height2;              /**< = Height - 2*Border */
1320    GLuint Depth2;               /**< = Depth - 2*Border */
1321    GLuint WidthLog2;            /**< = log2(Width2) */
1322    GLuint HeightLog2;           /**< = log2(Height2) */
1323    GLuint DepthLog2;            /**< = log2(Depth2) */
1324    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1325    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1326    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1327    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1328    GLboolean IsClientData;      /**< Data owned by client? */
1329    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1330
1331    const struct gl_texture_format *TexFormat;
1332
1333    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1334
1335    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1336    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1337
1338    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1339    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1340
1341    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1342    GLuint *ImageOffsets;        /**< if 3D texture: array [Depth] of offsets to
1343                                      each 2D slice in 'Data', in texels */
1344    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1345
1346    /**
1347     * \name For device driver:
1348     */
1349    /*@{*/
1350    void *DriverData;            /**< Arbitrary device driver data */
1351    /*@}*/
1352 };
1353
1354
1355 /**
1356  * Indexes for cube map faces.
1357  */
1358 /*@{*/
1359 #define FACE_POS_X   0
1360 #define FACE_NEG_X   1
1361 #define FACE_POS_Y   2
1362 #define FACE_NEG_Y   3
1363 #define FACE_POS_Z   4
1364 #define FACE_NEG_Z   5
1365 #define MAX_FACES  6
1366 /*@}*/
1367
1368
1369 /**
1370  * Texture object state.  Contains the array of mipmap images, border color,
1371  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1372  * color palette.
1373  */
1374 struct gl_texture_object
1375 {
1376    _glthread_Mutex Mutex;       /**< for thread safety */
1377    GLint RefCount;              /**< reference count */
1378    GLuint Name;                 /**< the user-visible texture object ID */
1379    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1380    GLfloat Priority;            /**< in [0,1] */
1381    GLfloat BorderColor[4];      /**< unclamped */
1382    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1383    GLenum WrapS;                /**< S-axis texture image wrap mode */
1384    GLenum WrapT;                /**< T-axis texture image wrap mode */
1385    GLenum WrapR;                /**< R-axis texture image wrap mode */
1386    GLenum MinFilter;            /**< minification filter */
1387    GLenum MagFilter;            /**< magnification filter */
1388    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1389    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1390    GLfloat LodBias;             /**< OpenGL 1.4 */
1391    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1392    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1393    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1394    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1395    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1396    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1397    GLenum CompareMode;          /**< GL_ARB_shadow */
1398    GLenum CompareFunc;          /**< GL_ARB_shadow */
1399    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1400    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1401    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1402    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1403    GLboolean Complete;          /**< Is texture object complete? */
1404
1405    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1406    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1407
1408    /** GL_EXT_paletted_texture */
1409    struct gl_color_table Palette;
1410
1411
1412    /**
1413     * \name For device driver.
1414     * Note: instead of attaching driver data to this pointer, it's preferable
1415     * to instead use this struct as a base class for your own texture object
1416     * class.  Driver->NewTextureObject() can be used to implement the
1417     * allocation.
1418     */
1419    void *DriverData;    /**< Arbitrary device driver data */
1420 };
1421
1422
1423 /**
1424  * Texture combine environment state.
1425  *
1426  * \todo
1427  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1428  * structure will need to be expanded for 4 elements.
1429  */
1430 struct gl_tex_env_combine_state
1431 {
1432    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1433    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1434    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1435    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1436    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1437    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1438    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1439    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1440    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1441    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1442 };
1443
1444
1445 /**
1446  * Texture unit state.  Contains enable flags, texture environment/function/
1447  * combiners, texgen state, pointers to current texture objects and
1448  * post-filter color tables.
1449  */
1450 struct gl_texture_unit
1451 {
1452    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1453    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1454
1455    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1456    GLfloat EnvColor[4];
1457    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1458    /** \name Tex coord generation mode
1459     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1460    /*@{*/
1461    GLenum GenModeS;
1462    GLenum GenModeT;
1463    GLenum GenModeR;
1464    GLenum GenModeQ;
1465    /*@}*/
1466    GLbitfield _GenBitS;
1467    GLbitfield _GenBitT;
1468    GLbitfield _GenBitR;
1469    GLbitfield _GenBitQ;
1470    GLbitfield _GenFlags;        /**< bitwise or of GenBit[STRQ] */
1471    GLfloat ObjectPlaneS[4];
1472    GLfloat ObjectPlaneT[4];
1473    GLfloat ObjectPlaneR[4];
1474    GLfloat ObjectPlaneQ[4];
1475    GLfloat EyePlaneS[4];
1476    GLfloat EyePlaneT[4];
1477    GLfloat EyePlaneR[4];
1478    GLfloat EyePlaneQ[4];
1479    GLfloat LodBias;             /**< for biasing mipmap levels */
1480
1481    /**
1482     * \name GL_EXT_texture_env_combine
1483     */
1484    struct gl_tex_env_combine_state Combine;
1485
1486    /**
1487     * Derived state based on \c EnvMode and the \c BaseFormat of the
1488     * currently enabled texture.
1489     */
1490    struct gl_tex_env_combine_state _EnvMode;
1491
1492    /**
1493     * Currently enabled combiner state.  This will point to either
1494     * \c Combine or \c _EnvMode.
1495     */
1496    struct gl_tex_env_combine_state *_CurrentCombine;
1497
1498    struct gl_texture_object *Current1D;
1499    struct gl_texture_object *Current2D;
1500    struct gl_texture_object *Current3D;
1501    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1502    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1503
1504    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1505
1506    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1507    struct gl_texture_object Saved2D;
1508    struct gl_texture_object Saved3D;
1509    struct gl_texture_object SavedCubeMap;
1510    struct gl_texture_object SavedRect;
1511
1512    /* GL_SGI_texture_color_table */
1513    struct gl_color_table ColorTable;
1514    struct gl_color_table ProxyColorTable;
1515    GLboolean ColorTableEnabled;
1516 };
1517
1518 struct texenvprog_cache_item {
1519    GLuint hash;
1520    void *key;
1521    struct gl_fragment_program *data;
1522    struct texenvprog_cache_item *next;
1523 };
1524
1525 struct texenvprog_cache {
1526    struct texenvprog_cache_item **items;
1527    GLuint size, n_items;
1528    GLcontext *ctx;
1529 };
1530
1531 /**
1532  * Texture attribute group (GL_TEXTURE_BIT).
1533  */
1534 struct gl_texture_attrib
1535 {
1536    /**
1537     * name multitexture
1538     */
1539    /**@{*/
1540    GLuint CurrentUnit;         /**< Active texture unit */
1541    GLbitfield _EnabledUnits;  /**< one bit set for each really-enabled unit */
1542    GLbitfield _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1543    GLbitfield _GenFlags;            /**< for texgen */
1544    GLbitfield _TexGenEnabled;
1545    GLbitfield _TexMatEnabled;
1546    /**@}*/
1547
1548    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1549
1550    struct gl_texture_object *Proxy1D;
1551    struct gl_texture_object *Proxy2D;
1552    struct gl_texture_object *Proxy3D;
1553    struct gl_texture_object *ProxyCubeMap;
1554    struct gl_texture_object *ProxyRect;
1555
1556    /** GL_EXT_shared_texture_palette */
1557    GLboolean SharedPalette;
1558    struct gl_color_table Palette;
1559
1560    /** Cached texenv fragment programs */
1561    struct texenvprog_cache env_fp_cache;
1562 };
1563
1564
1565 /**
1566  * Transformation attribute group (GL_TRANSFORM_BIT).
1567  */
1568 struct gl_transform_attrib
1569 {
1570    GLenum MatrixMode;                           /**< Matrix mode */
1571    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1572    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1573    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1574    GLboolean Normalize;                         /**< Normalize all normals? */
1575    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1576    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1577
1578    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1579    GLfloat CullEyePos[4];
1580    GLfloat CullObjPos[4];
1581 };
1582
1583
1584 /**
1585  * Viewport attribute group (GL_VIEWPORT_BIT).
1586  */
1587 struct gl_viewport_attrib
1588 {
1589    GLint X, Y;                  /**< position */
1590    GLsizei Width, Height;       /**< size */
1591    GLfloat Near, Far;           /**< Depth buffer range */
1592    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1593 };
1594
1595
1596 /**
1597  * Node for the attribute stack.
1598  */
1599 struct gl_attrib_node
1600 {
1601    GLbitfield kind;
1602    void *data;
1603    struct gl_attrib_node *next;
1604 };
1605
1606
1607 /**
1608  * GL_ARB_vertex/pixel_buffer_object buffer object
1609  */
1610 struct gl_buffer_object
1611 {
1612    GLint RefCount;
1613    GLuint Name;
1614    GLenum Usage;
1615    GLenum Access;
1616    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1617    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1618    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1619    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1620 };
1621
1622
1623
1624 /**
1625  * Client pixel packing/unpacking attributes
1626  */
1627 struct gl_pixelstore_attrib
1628 {
1629    GLint Alignment;
1630    GLint RowLength;
1631    GLint SkipPixels;
1632    GLint SkipRows;
1633    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1634    GLint SkipImages;      /**< for GL_EXT_texture3D */
1635    GLboolean SwapBytes;
1636    GLboolean LsbFirst;
1637    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1638    GLboolean Invert;        /**< GL_MESA_pack_invert */
1639    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1640 };
1641
1642
1643
1644 /**
1645  * Client vertex array attributes
1646  */
1647 struct gl_client_array
1648 {
1649    GLint Size;                  /**< components per element (1,2,3,4) */
1650    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1651    GLsizei Stride;              /**< user-specified stride */
1652    GLsizei StrideB;             /**< actual stride in bytes */
1653    const GLubyte *Ptr;          /**< Points to array data */
1654    GLboolean Enabled;           /**< Enabled flag is a boolean */
1655    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1656
1657    /**< GL_ARB_vertex_buffer_object */
1658    struct gl_buffer_object *BufferObj;
1659    GLuint _MaxElement;
1660 };
1661
1662
1663 /**
1664  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1665  * extension, but a nice encapsulation in any case.
1666  */
1667 struct gl_array_object
1668 {
1669    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1670    GLuint Name;
1671
1672    /** Conventional vertex arrays */
1673    /*@{*/
1674    struct gl_client_array Vertex;
1675    struct gl_client_array Normal;
1676    struct gl_client_array Color;
1677    struct gl_client_array SecondaryColor;
1678    struct gl_client_array FogCoord;
1679    struct gl_client_array Index;
1680    struct gl_client_array EdgeFlag;
1681    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1682    /*@}*/
1683
1684    /** Generic arrays for vertex programs/shaders */
1685    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1686
1687    /** Mask of _NEW_ARRAY_* values indicating which arrays are enabled */
1688    GLbitfield _Enabled;
1689 };
1690
1691
1692 /**
1693  * Vertex array state
1694  */
1695 struct gl_array_attrib
1696 {
1697    struct gl_array_object *ArrayObj;
1698    struct gl_array_object *DefaultArrayObj;
1699
1700    GLint ActiveTexture;         /**< Client Active Texture */
1701    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1702    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1703
1704    GLbitfield NewState;         /**< mask of _NEW_ARRAY_* values */
1705
1706 #if FEATURE_ARB_vertex_buffer_object
1707    struct gl_buffer_object *NullBufferObj;
1708    struct gl_buffer_object *ArrayBufferObj;
1709    struct gl_buffer_object *ElementArrayBufferObj;
1710 #endif
1711    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1712 };
1713
1714
1715 /**
1716  * Feedback buffer state
1717  */
1718 struct gl_feedback
1719 {
1720    GLenum Type;
1721    GLbitfield _Mask;            /* FB_* bits */
1722    GLfloat *Buffer;
1723    GLuint BufferSize;
1724    GLuint Count;
1725 };
1726
1727
1728 /**
1729  * Selection buffer state
1730  */
1731 struct gl_selection
1732 {
1733    GLuint *Buffer;      /**< selection buffer */
1734    GLuint BufferSize;   /**< size of the selection buffer */
1735    GLuint BufferCount;  /**< number of values in the selection buffer */
1736    GLuint Hits;         /**< number of records in the selection buffer */
1737    GLuint NameStackDepth; /**< name stack depth */
1738    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1739    GLboolean HitFlag;   /**< hit flag */
1740    GLfloat HitMinZ;     /**< minimum hit depth */
1741    GLfloat HitMaxZ;     /**< maximum hit depth */
1742 };
1743
1744
1745 /**
1746  * 1-D Evaluator control points
1747  */
1748 struct gl_1d_map
1749 {
1750    GLuint Order;        /**< Number of control points */
1751    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1752    GLfloat *Points;     /**< Points to contiguous control points */
1753 };
1754
1755
1756 /**
1757  * 2-D Evaluator control points
1758  */
1759 struct gl_2d_map
1760 {
1761    GLuint Uorder;               /**< Number of control points in U dimension */
1762    GLuint Vorder;               /**< Number of control points in V dimension */
1763    GLfloat u1, u2, du;
1764    GLfloat v1, v2, dv;
1765    GLfloat *Points;             /**< Points to contiguous control points */
1766 };
1767
1768
1769 /**
1770  * All evaluator control point state
1771  */
1772 struct gl_evaluators
1773 {
1774    /**
1775     * \name 1-D maps
1776     */
1777    /*@{*/
1778    struct gl_1d_map Map1Vertex3;
1779    struct gl_1d_map Map1Vertex4;
1780    struct gl_1d_map Map1Index;
1781    struct gl_1d_map Map1Color4;
1782    struct gl_1d_map Map1Normal;
1783    struct gl_1d_map Map1Texture1;
1784    struct gl_1d_map Map1Texture2;
1785    struct gl_1d_map Map1Texture3;
1786    struct gl_1d_map Map1Texture4;
1787    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1788    /*@}*/
1789
1790    /**
1791     * \name 2-D maps
1792     */
1793    /*@{*/
1794    struct gl_2d_map Map2Vertex3;
1795    struct gl_2d_map Map2Vertex4;
1796    struct gl_2d_map Map2Index;
1797    struct gl_2d_map Map2Color4;
1798    struct gl_2d_map Map2Normal;
1799    struct gl_2d_map Map2Texture1;
1800    struct gl_2d_map Map2Texture2;
1801    struct gl_2d_map Map2Texture3;
1802    struct gl_2d_map Map2Texture4;
1803    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1804    /*@}*/
1805 };
1806
1807
1808 /**
1809  * Names of the various vertex/fragment program register files, etc.
1810  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1811  * All values should fit in a 4-bit field.
1812  */
1813 enum register_file
1814 {
1815    PROGRAM_TEMPORARY = 0,
1816    PROGRAM_LOCAL_PARAM = 1,
1817    PROGRAM_ENV_PARAM = 2,
1818    PROGRAM_STATE_VAR = 3,
1819    PROGRAM_INPUT = 4,
1820    PROGRAM_OUTPUT = 5,
1821    PROGRAM_NAMED_PARAM = 6,
1822    PROGRAM_CONSTANT = 7,
1823    PROGRAM_WRITE_ONLY = 8,
1824    PROGRAM_ADDRESS = 9,
1825    PROGRAM_UNDEFINED = 10,  /* invalid value */
1826    PROGRAM_FILE_MAX
1827 };
1828
1829
1830 /** Vertex and fragment instructions */
1831 struct prog_instruction;
1832 struct gl_program_parameter_list;
1833
1834
1835 /**
1836  * Base class for any kind of program object
1837  */
1838 struct gl_program
1839 {
1840    GLuint Id;
1841    GLubyte *String;          /**< Null-terminated program text */
1842    GLint RefCount;
1843    GLenum Target;
1844    GLenum Format;            /**< String encoding format */
1845    GLboolean Resident;
1846
1847    struct prog_instruction *Instructions;
1848
1849    GLbitfield InputsRead;     /* Bitmask of which input regs are read */
1850    GLbitfield OutputsWritten; /* Bitmask of which output regs are written to */
1851
1852    /** Named parameters, constants, etc. from program text */
1853    struct gl_program_parameter_list *Parameters;
1854    /** Numbered local parameters */
1855    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1856
1857    /** Logical counts */
1858    /*@{*/
1859    GLuint NumInstructions;
1860    GLuint NumTemporaries;
1861    GLuint NumParameters;
1862    GLuint NumAttributes;
1863    GLuint NumAddressRegs;
1864    /*@}*/
1865    /** Native, actual h/w counts */
1866    /*@{*/
1867    GLuint NumNativeInstructions;
1868    GLuint NumNativeTemporaries;
1869    GLuint NumNativeParameters;
1870    GLuint NumNativeAttributes;
1871    GLuint NumNativeAddressRegs;
1872    /*@}*/
1873 };
1874
1875
1876 /** Vertex program object */
1877 struct gl_vertex_program
1878 {
1879    struct gl_program Base;   /**< base class */
1880    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1881    GLboolean IsPositionInvariant;
1882    void *TnlData;               /**< should probably use Base.DriverData */
1883 };
1884
1885
1886 /** Fragment program object */
1887 struct gl_fragment_program
1888 {
1889    struct gl_program Base;   /**< base class */
1890    GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1891    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1892    GLuint NumTexInstructions;
1893    GLuint NumTexIndirections;
1894    GLuint NumNativeAluInstructions; /**< GL_ARB_fragment_program */
1895    GLuint NumNativeTexInstructions;
1896    GLuint NumNativeTexIndirections;
1897    GLenum FogOption;
1898    GLboolean UsesKill;
1899 };
1900
1901
1902 /**
1903  * State common to vertex and fragment programs.
1904  */
1905 struct gl_program_state
1906 {
1907    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1908    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1909 };
1910
1911
1912 /**
1913  * Context state for vertex programs.
1914  */
1915 struct gl_vertex_program_state
1916 {
1917    GLboolean Enabled;               /**< GL_VERTEX_PROGRAM_ARB/NV */
1918    GLboolean _Enabled;              /**< Enabled and valid program? */
1919    GLboolean PointSizeEnabled;      /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1920    GLboolean TwoSideEnabled;        /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1921    struct gl_vertex_program *Current;  /**< ptr to currently bound program */
1922    const struct gl_vertex_program *_Current;    /**< ptr to currently bound
1923                                                   program, including internal
1924                                                   (t_vp_build.c) programs */
1925
1926    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /**< Env params */
1927
1928    /* For GL_NV_vertex_program only: */
1929    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1930    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1931
1932 #if FEATURE_MESA_program_debug
1933    GLprogramcallbackMESA Callback;
1934    GLvoid *CallbackData;
1935    GLboolean CallbackEnabled;
1936    GLuint CurrentPosition;
1937 #endif
1938 };
1939
1940
1941 /**
1942  * Context state for fragment programs.
1943  */
1944 struct gl_fragment_program_state
1945 {
1946    GLboolean Enabled;     /**< User-set fragment program enable flag */
1947    GLboolean _Enabled;    /**< Fragment program enabled and valid? */
1948    GLboolean _Active;     /**< Is a user program or internal program active? */
1949    struct gl_fragment_program *Current;  /**< User-bound program */
1950    const struct gl_fragment_program *_Current; /**< currently active program
1951                                                (including internal programs) */
1952    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /**< Env params */
1953
1954 #if FEATURE_MESA_program_debug
1955    GLprogramcallbackMESA Callback;
1956    GLvoid *CallbackData;
1957    GLboolean CallbackEnabled;
1958    GLuint CurrentPosition;
1959 #endif
1960 };
1961
1962
1963 /**
1964  * ATI_fragment_shader runtime state
1965  */
1966 #define ATI_FS_INPUT_PRIMARY 0
1967 #define ATI_FS_INPUT_SECONDARY 1
1968
1969 struct atifs_instruction;
1970 struct atifs_setupinst;
1971
1972 /**
1973  * ATI fragment shader
1974  */
1975 struct ati_fragment_shader
1976 {
1977    GLuint Id;
1978    GLint RefCount;
1979    struct atifs_instruction *Instructions[2];
1980    struct atifs_setupinst *SetupInst[2];
1981    GLfloat Constants[8][4];
1982    GLbitfield LocalConstDef;  /** Indicates which constants have been set */
1983    GLubyte numArithInstr[2];
1984    GLubyte regsAssigned[2];
1985    GLubyte NumPasses;         /** 1 or 2 */
1986    GLubyte cur_pass;
1987    GLubyte last_optype;
1988    GLboolean interpinp1;
1989    GLboolean isValid;
1990    GLuint swizzlerq;
1991 };
1992
1993 /**
1994  * Context state for GL_ATI_fragment_shader
1995  */
1996 struct gl_ati_fragment_shader_state
1997 {
1998    GLboolean Enabled;
1999    GLboolean _Enabled;                      /** enabled and valid shader? */
2000    GLboolean Compiling;
2001    GLfloat GlobalConstants[8][4];
2002    struct ati_fragment_shader *Current;
2003 };
2004
2005
2006 /**
2007  * Occlusion/timer query object.
2008  */
2009 struct gl_query_object
2010 {
2011    GLuint Id;
2012    GLuint64EXT Result; /* the counter */
2013    GLboolean Active;   /* inside Begin/EndQuery */
2014    GLboolean Ready;    /* result is ready */
2015 };
2016
2017
2018 /**
2019  * Context state for query objects.
2020  */
2021 struct gl_query_state
2022 {
2023    struct _mesa_HashTable *QueryObjects;
2024    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2025    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2026 };
2027
2028
2029 /**
2030  * Context state for vertex/fragment shaders.
2031  */
2032 struct gl_shader_objects_state
2033 {
2034    struct gl2_program_intf **CurrentProgram;
2035    GLboolean _VertexShaderPresent;
2036    GLboolean _FragmentShaderPresent;
2037 };
2038
2039
2040 /**
2041  * State which can be shared by multiple contexts:
2042  */
2043 struct gl_shared_state
2044 {
2045    _glthread_Mutex Mutex;                  /**< for thread safety */
2046    GLint RefCount;                         /**< Reference count */
2047    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2048    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2049
2050    /**
2051     * \name Default texture objects (shared by all multi-texture units)
2052     */
2053    /*@{*/
2054    struct gl_texture_object *Default1D;
2055    struct gl_texture_object *Default2D;
2056    struct gl_texture_object *Default3D;
2057    struct gl_texture_object *DefaultCubeMap;
2058    struct gl_texture_object *DefaultRect;
2059    /*@}*/
2060
2061    /**
2062     * \name Thread safety and statechange notification for texture
2063     * objects.
2064     *
2065     * \todo Improve the granularity of locking.
2066     */
2067    /*@{*/
2068    _glthread_Mutex TexMutex;               /**< texobj thread safety */
2069    GLuint TextureStateStamp;               /**< state notification for shared tex  */
2070    /*@}*/
2071
2072
2073
2074    /**
2075     * \name Vertex/fragment programs
2076     */
2077    /*@{*/
2078    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2079 #if FEATURE_ARB_vertex_program
2080    struct gl_program *DefaultVertexProgram;
2081 #endif
2082 #if FEATURE_ARB_fragment_program
2083    struct gl_program *DefaultFragmentProgram;
2084 #endif
2085    /*@}*/
2086
2087 #if FEATURE_ATI_fragment_shader
2088    struct _mesa_HashTable *ATIShaders;
2089    struct ati_fragment_shader *DefaultFragmentShader;
2090 #endif
2091
2092 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2093    struct _mesa_HashTable *BufferObjects;
2094 #endif
2095
2096 #if FEATURE_ARB_shader_objects
2097    struct _mesa_HashTable *GL2Objects;
2098 #endif
2099
2100 #if FEATURE_EXT_framebuffer_object
2101    struct _mesa_HashTable *RenderBuffers;
2102    struct _mesa_HashTable *FrameBuffers;
2103 #endif
2104
2105    /** Objects associated with the GL_APPLE_vertex_array_object extension. */
2106    struct _mesa_HashTable *ArrayObjects;
2107
2108    void *DriverData;  /**< Device driver shared state */
2109 };
2110
2111
2112
2113
2114 /**
2115  * A renderbuffer stores colors or depth values or stencil values.
2116  * A framebuffer object will have a collection of these.
2117  * Data are read/written to the buffer with a handful of Get/Put functions.
2118  *
2119  * Instances of this object are allocated with the Driver's NewRenderbuffer
2120  * hook.  Drivers will likely wrap this class inside a driver-specific
2121  * class to simulate inheritance.
2122  */
2123 struct gl_renderbuffer
2124 {
2125    _glthread_Mutex Mutex;                  /**< for thread safety */
2126    GLuint ClassID;        /**< Useful for drivers */
2127    GLuint Name;
2128    GLint RefCount;
2129    GLuint Width, Height;
2130    GLenum InternalFormat; /**< The user-specified format */
2131    GLenum _ActualFormat;  /**< The driver-chosen format */
2132    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2133                                GL_STENCIL_INDEX. */
2134    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2135    GLubyte RedBits;      /**< Bits of red per pixel */
2136    GLubyte GreenBits;
2137    GLubyte BlueBits;
2138    GLubyte AlphaBits;
2139    GLubyte IndexBits;
2140    GLubyte DepthBits;
2141    GLubyte StencilBits;
2142    GLvoid *Data;
2143
2144    /* Used to wrap one renderbuffer around another: */
2145    struct gl_renderbuffer *Wrapped;
2146
2147    /* Delete this renderbuffer */
2148    void (*Delete)(struct gl_renderbuffer *rb);
2149
2150    /* Allocate new storage for this renderbuffer */
2151    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2152                              GLenum internalFormat,
2153                              GLuint width, GLuint height);
2154
2155    /* Lock/Unlock are called before/after calling the Get/Put functions.
2156     * Not sure this is the right place for these yet.
2157    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2158    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2159     */
2160
2161    /* Return a pointer to the element/pixel at (x,y).
2162     * Should return NULL if the buffer memory can't be directly addressed.
2163     */
2164    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2165                        GLint x, GLint y);
2166
2167    /* Get/Read a row of values.
2168     * The values will be of format _BaseFormat and type DataType.
2169     */
2170    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2171                   GLint x, GLint y, void *values);
2172
2173    /* Get/Read values at arbitrary locations.
2174     * The values will be of format _BaseFormat and type DataType.
2175     */
2176    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2177                      const GLint x[], const GLint y[], void *values);
2178
2179    /* Put/Write a row of values.
2180     * The values will be of format _BaseFormat and type DataType.
2181     */
2182    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2183                   GLint x, GLint y, const void *values, const GLubyte *mask);
2184
2185    /* Put/Write a row of RGB values.  This is a special-case routine that's
2186     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2187     * a common case for glDrawPixels and some triangle routines.
2188     * The values will be of format GL_RGB and type DataType.
2189     */
2190    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2191                     GLint x, GLint y, const void *values, const GLubyte *mask);
2192
2193
2194    /* Put/Write a row of identical values.
2195     * The values will be of format _BaseFormat and type DataType.
2196     */
2197    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2198                      GLint x, GLint y, const void *value, const GLubyte *mask);
2199
2200    /* Put/Write values at arbitrary locations.
2201     * The values will be of format _BaseFormat and type DataType.
2202     */
2203    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2204                      const GLint x[], const GLint y[], const void *values,
2205                      const GLubyte *mask);
2206    /* Put/Write identical values at arbitrary locations.
2207     * The values will be of format _BaseFormat and type DataType.
2208     */
2209    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2210                          GLuint count, const GLint x[], const GLint y[],
2211                          const void *value, const GLubyte *mask);
2212 };
2213
2214
2215 /**
2216  * A renderbuffer attachment point points to either a texture object
2217  * (and specifies a mipmap level, cube face or 3D texture slice) or
2218  * points to a renderbuffer.
2219  */
2220 struct gl_renderbuffer_attachment
2221 {
2222    GLenum Type;  /* GL_NONE or GL_TEXTURE or GL_RENDERBUFFER_EXT */
2223    GLboolean Complete;
2224
2225    /* IF Type == GL_RENDERBUFFER_EXT: */
2226    struct gl_renderbuffer *Renderbuffer;
2227
2228    /* IF Type == GL_TEXTURE: */
2229    struct gl_texture_object *Texture;
2230    GLuint TextureLevel;
2231    GLuint CubeMapFace;  /* 0 .. 5, for cube map textures */
2232    GLuint Zoffset;      /* for 3D textures */
2233 };
2234
2235
2236 /**
2237  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2238  * In C++ terms, think of this as a base class from which device drivers
2239  * will make derived classes.
2240  */
2241 struct gl_framebuffer
2242 {
2243    _glthread_Mutex Mutex;                  /**< for thread safety */
2244    GLuint Name;      /* if zero, this is a window system framebuffer */
2245    GLint RefCount;
2246    GLboolean DeletePending;
2247
2248    GLvisual Visual;     /**< The framebuffer's visual.
2249                              Immutable if this is a window system buffer.
2250                              Computed from attachments if user-made FBO. */
2251
2252    GLboolean Initialized;
2253
2254    GLuint Width, Height;        /**< size of frame buffer in pixels */
2255
2256    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2257    /*@{*/
2258    GLint _Xmin, _Xmax;  /**< inclusive */
2259    GLint _Ymin, _Ymax;  /**< exclusive */
2260    /*@}*/
2261
2262    /** \name  Derived Z buffer stuff */
2263    /*@{*/
2264    GLuint _DepthMax;    /**< Max depth buffer value */
2265    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2266    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2267    /*@}*/
2268
2269    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2270
2271    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2272    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2273
2274    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2275     * attribute group and GL_PIXEL attribute group, respectively.
2276     */
2277    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2278    GLenum ColorReadBuffer;
2279
2280    /* These are computed from ColorDrawBuffer and ColorReadBuffer */
2281    GLbitfield _ColorDrawBufferMask[MAX_DRAW_BUFFERS]; /* Mask of BUFFER_BIT_* flags */
2282    GLint _ColorReadBufferIndex; /* -1 = None */
2283
2284    /* These are computed from _ColorDrawBufferMask and _ColorReadBufferIndex */
2285    GLuint _NumColorDrawBuffers[MAX_DRAW_BUFFERS];
2286    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS][4];
2287    struct gl_renderbuffer *_ColorReadBuffer;
2288
2289    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2290     * depth/stencil buffers attached above. */
2291    struct gl_renderbuffer *_DepthBuffer;
2292    struct gl_renderbuffer *_StencilBuffer;
2293
2294    /** Delete this framebuffer */
2295    void (*Delete)(struct gl_framebuffer *fb);
2296 };
2297
2298
2299 /**
2300  * Limits for vertex and fragment programs.
2301  */
2302 struct gl_program_constants
2303 {
2304    /* logical limits */
2305    GLuint MaxInstructions;
2306    GLuint MaxAluInstructions; /* fragment programs only, for now */
2307    GLuint MaxTexInstructions; /* fragment programs only, for now */
2308    GLuint MaxTexIndirections; /* fragment programs only, for now */
2309    GLuint MaxAttribs;
2310    GLuint MaxTemps;
2311    GLuint MaxAddressRegs; /* vertex program only, for now */
2312    GLuint MaxParameters;
2313    GLuint MaxLocalParams;
2314    GLuint MaxEnvParams;
2315    /* native/hardware limits */
2316    GLuint MaxNativeInstructions;
2317    GLuint MaxNativeAluInstructions; /* fragment programs only, for now */
2318    GLuint MaxNativeTexInstructions; /* fragment programs only, for now */
2319    GLuint MaxNativeTexIndirections; /* fragment programs only, for now */
2320    GLuint MaxNativeAttribs;
2321    GLuint MaxNativeTemps;
2322    GLuint MaxNativeAddressRegs; /* vertex program only, for now */
2323    GLuint MaxNativeParameters;
2324    /* For shaders */
2325    GLuint MaxUniformComponents;
2326 };
2327
2328
2329 /**
2330  * Constants which may be overridden by device driver during context creation
2331  * but are never changed after that.
2332  */
2333 struct gl_constants
2334 {
2335    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2336    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2337    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2338    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2339    GLuint MaxTextureCoordUnits;
2340    GLuint MaxTextureImageUnits;
2341    GLuint MaxTextureUnits;              /* = MIN(CoordUnits, ImageUnits) */
2342    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2343    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2344    GLuint MaxArrayLockSize;
2345    GLint SubPixelBits;
2346    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2347    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2348    GLfloat PointSizeGranularity;
2349    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2350    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2351    GLfloat LineWidthGranularity;
2352    GLuint MaxColorTableSize;
2353    GLuint MaxConvolutionWidth;
2354    GLuint MaxConvolutionHeight;
2355    GLuint MaxClipPlanes;
2356    GLuint MaxLights;
2357    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2358    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2359    GLuint MaxViewportWidth, MaxViewportHeight;
2360    struct gl_program_constants VertexProgram;    /* GL_ARB_vertex_program */
2361    struct gl_program_constants FragmentProgram;  /* GL_ARB_fragment_program */
2362    /* shared by vertex and fragment program: */
2363    GLuint MaxProgramMatrices;
2364    GLuint MaxProgramMatrixStackDepth;
2365    /* vertex array / buffer object bounds checking */
2366    GLboolean CheckArrayBounds;
2367    /* GL_ARB_draw_buffers */
2368    GLuint MaxDrawBuffers;
2369    /* GL_OES_read_format */
2370    GLenum ColorReadFormat;
2371    GLenum ColorReadType;
2372    /* GL_EXT_framebuffer_object */
2373    GLuint MaxColorAttachments;
2374    GLuint MaxRenderbufferSize;
2375    /* GL_ARB_vertex_shader */
2376    GLuint MaxVertexTextureImageUnits;
2377    GLuint MaxVaryingFloats;
2378 };
2379
2380
2381 /**
2382  * Enable flag for each OpenGL extension.  Different device drivers will
2383  * enable different extensions at runtime.
2384  */
2385 struct gl_extensions
2386 {
2387    /**
2388     * \name Flags to quickly test if certain extensions are available.
2389     *
2390     * Not every extension needs to have such a flag, but it's encouraged.
2391     */
2392    /*@{*/
2393    GLboolean dummy;  /* don't remove this! */
2394    GLboolean ARB_depth_texture;
2395    GLboolean ARB_draw_buffers;
2396    GLboolean ARB_fragment_program;
2397    GLboolean ARB_fragment_shader;
2398    GLboolean ARB_half_float_pixel;
2399    GLboolean ARB_imaging;
2400    GLboolean ARB_multisample;
2401    GLboolean ARB_multitexture;
2402    GLboolean ARB_occlusion_query;
2403    GLboolean ARB_point_sprite;
2404    GLboolean ARB_shader_objects;
2405    GLboolean ARB_shading_language_100;
2406    GLboolean ARB_shading_language_120;
2407    GLboolean ARB_shadow;
2408    GLboolean ARB_texture_border_clamp;
2409    GLboolean ARB_texture_compression;
2410    GLboolean ARB_texture_cube_map;
2411    GLboolean ARB_texture_env_combine;
2412    GLboolean ARB_texture_env_crossbar;
2413    GLboolean ARB_texture_env_dot3;
2414    GLboolean ARB_texture_float;
2415    GLboolean ARB_texture_mirrored_repeat;
2416    GLboolean ARB_texture_non_power_of_two;
2417    GLboolean ARB_transpose_matrix;
2418    GLboolean ARB_vertex_buffer_object;
2419    GLboolean ARB_vertex_program;
2420    GLboolean ARB_vertex_shader;
2421    GLboolean ARB_window_pos;
2422    GLboolean EXT_abgr;
2423    GLboolean EXT_bgra;
2424    GLboolean EXT_blend_color;
2425    GLboolean EXT_blend_equation_separate;
2426    GLboolean EXT_blend_func_separate;
2427    GLboolean EXT_blend_logic_op;
2428    GLboolean EXT_blend_minmax;
2429    GLboolean EXT_blend_subtract;
2430    GLboolean EXT_clip_volume_hint;
2431    GLboolean EXT_cull_vertex;
2432    GLboolean EXT_convolution;
2433    GLboolean EXT_compiled_vertex_array;
2434    GLboolean EXT_copy_texture;
2435    GLboolean EXT_depth_bounds_test;
2436    GLboolean EXT_draw_range_elements;
2437    GLboolean EXT_framebuffer_object;
2438    GLboolean EXT_fog_coord;
2439    GLboolean EXT_framebuffer_blit;
2440    GLboolean EXT_gpu_program_parameters;
2441    GLboolean EXT_histogram;
2442    GLboolean EXT_multi_draw_arrays;
2443    GLboolean EXT_paletted_texture;
2444    GLboolean EXT_packed_depth_stencil;
2445    GLboolean EXT_packed_pixels;
2446    GLboolean EXT_pixel_buffer_object;
2447    GLboolean EXT_point_parameters;
2448    GLboolean EXT_polygon_offset;
2449    GLboolean EXT_rescale_normal;
2450    GLboolean EXT_shadow_funcs;
2451    GLboolean EXT_secondary_color;
2452    GLboolean EXT_separate_specular_color;
2453    GLboolean EXT_shared_texture_palette;
2454    GLboolean EXT_stencil_wrap;
2455    GLboolean EXT_stencil_two_side;
2456    GLboolean EXT_subtexture;
2457    GLboolean EXT_texture;
2458    GLboolean EXT_texture_object;
2459    GLboolean EXT_texture3D;
2460    GLboolean EXT_texture_compression_s3tc;
2461    GLboolean EXT_texture_env_add;
2462    GLboolean EXT_texture_env_combine;
2463    GLboolean EXT_texture_env_dot3;
2464    GLboolean EXT_texture_filter_anisotropic;
2465    GLboolean EXT_texture_lod_bias;
2466    GLboolean EXT_texture_mirror_clamp;
2467    GLboolean EXT_texture_sRGB;
2468    GLboolean EXT_timer_query;
2469    GLboolean EXT_vertex_array;
2470    GLboolean EXT_vertex_array_set;
2471    /* vendor extensions */
2472    GLboolean APPLE_client_storage;
2473    GLboolean APPLE_packed_pixels;
2474    GLboolean APPLE_vertex_array_object;
2475    GLboolean ATI_texture_mirror_once;
2476    GLboolean ATI_texture_env_combine3;
2477    GLboolean ATI_fragment_shader;
2478    GLboolean ATI_separate_stencil;
2479    GLboolean IBM_rasterpos_clip;
2480    GLboolean IBM_multimode_draw_arrays;
2481    GLboolean MESA_pack_invert;
2482    GLboolean MESA_packed_depth_stencil;
2483    GLboolean MESA_program_debug;
2484    GLboolean MESA_resize_buffers;
2485    GLboolean MESA_ycbcr_texture;
2486    GLboolean NV_blend_square;
2487    GLboolean NV_fragment_program;
2488    GLboolean NV_light_max_exponent;
2489    GLboolean NV_point_sprite;
2490    GLboolean NV_texgen_reflection;
2491    GLboolean NV_texture_rectangle;
2492    GLboolean NV_vertex_program;
2493    GLboolean NV_vertex_program1_1;
2494    GLboolean OES_read_format;
2495    GLboolean SGI_color_matrix;
2496    GLboolean SGI_color_table;
2497    GLboolean SGI_texture_color_table;
2498    GLboolean SGIS_generate_mipmap;
2499    GLboolean SGIS_texture_edge_clamp;
2500    GLboolean SGIS_texture_lod;
2501    GLboolean SGIX_depth_texture;
2502    GLboolean SGIX_shadow;
2503    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2504    GLboolean TDFX_texture_compression_FXT1;
2505    GLboolean S3_s3tc;
2506    /*@}*/
2507    /* The extension string */
2508    const GLubyte *String;
2509 };
2510
2511
2512 /**
2513  * A stack of matrices (projection, modelview, color, texture, etc).
2514  */
2515 struct matrix_stack
2516 {
2517    GLmatrix *Top;      /**< points into Stack */
2518    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2519    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2520    GLuint MaxDepth;    /**< size of Stack[] array */
2521    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2522 };
2523
2524
2525 /**
2526  * \name Bits for image transfer operations
2527  *
2528  * \sa __GLcontextRec::ImageTransferState.
2529  */
2530 /*@{*/
2531 #define IMAGE_SCALE_BIAS_BIT                      0x1
2532 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2533 #define IMAGE_MAP_COLOR_BIT                       0x4
2534 #define IMAGE_COLOR_TABLE_BIT                     0x8
2535 #define IMAGE_CONVOLUTION_BIT                     0x10
2536 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2537 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2538 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2539 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2540 #define IMAGE_HISTOGRAM_BIT                       0x200
2541 #define IMAGE_MIN_MAX_BIT                         0x400
2542 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2543 #define IMAGE_RED_TO_LUMINANCE                    0x1000
2544
2545
2546 /** Pixel Transfer ops up to convolution */
2547 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2548                                     IMAGE_SHIFT_OFFSET_BIT |   \
2549                                     IMAGE_MAP_COLOR_BIT |      \
2550                                     IMAGE_COLOR_TABLE_BIT)
2551
2552 /** Pixel transfer ops after convolution */
2553 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2554                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2555                                      IMAGE_COLOR_MATRIX_BIT |                 \
2556                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2557                                      IMAGE_HISTOGRAM_BIT |                    \
2558                                      IMAGE_MIN_MAX_BIT)
2559 /*@}*/
2560
2561
2562 /**
2563  * \name Bits to indicate what state has changed.
2564  *
2565  * 4 unused flags.
2566  */
2567 /*@{*/
2568 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2569 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2570 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2571 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2572 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2573 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2574 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2575 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2576 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2577 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2578 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2579 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2580 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2581 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2582 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2583 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2584 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2585 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2586 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2587 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2588 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2589 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2590 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2591 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2592 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2593 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2594 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2595 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2596 #define _NEW_ALL ~0
2597 /*@}*/
2598
2599
2600 /**
2601  * \name Bits to track array state changes
2602  *
2603  * Also used to summarize array enabled.
2604  */
2605 /*@{*/
2606 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2607 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2608 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2609 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2610 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2611 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2612 #define _NEW_ARRAY_INDEX            VERT_BIT_COLOR_INDEX
2613 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_EDGEFLAG
2614 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2615 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2616 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2617 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2618 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2619 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2620 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2621 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2622 #define _NEW_ARRAY_ATTRIB_0         VERT_BIT_GENERIC0  /* start at bit 16 */
2623 #define _NEW_ARRAY_ALL              0xffffffff
2624
2625
2626 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2627 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2628 /*@}*/
2629
2630
2631 /**
2632  * \name A bunch of flags that we think might be useful to drivers.
2633  *
2634  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2635  */
2636 /*@{*/
2637 #define DD_FLATSHADE                0x1
2638 #define DD_SEPARATE_SPECULAR        0x2
2639 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2640 #define DD_TRI_LIGHT_TWOSIDE        0x8
2641 #define DD_TRI_UNFILLED             0x10
2642 #define DD_TRI_SMOOTH               0x20
2643 #define DD_TRI_STIPPLE              0x40
2644 #define DD_TRI_OFFSET               0x80
2645 #define DD_LINE_SMOOTH              0x100
2646 #define DD_LINE_STIPPLE             0x200
2647 #define DD_LINE_WIDTH               0x400
2648 #define DD_POINT_SMOOTH             0x800
2649 #define DD_POINT_SIZE               0x1000
2650 #define DD_POINT_ATTEN              0x2000
2651 #define DD_TRI_TWOSTENCIL           0x4000
2652 /*@}*/
2653
2654
2655 /**
2656  * \name Define the state changes under which each of these bits might change
2657  */
2658 /*@{*/
2659 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2660 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2661 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2662 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2663 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2664 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2665 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2666 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2667 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2668 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2669 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2670 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2671 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2672 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2673 /*@}*/
2674
2675
2676 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2677                                            _NEW_TEXTURE |       \
2678                                            _NEW_POINT |         \
2679                                            _NEW_PROGRAM |       \
2680                                            _NEW_MODELVIEW)
2681
2682 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2683                                            _NEW_TEXTURE)
2684
2685 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2686
2687
2688
2689
2690 /*
2691  * Forward declaration of display list data types:
2692  */
2693 union node;
2694 typedef union node Node;
2695
2696
2697 /* This has to be included here. */
2698 #include "dd.h"
2699
2700
2701 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2702
2703 /**
2704  * Core Mesa's support for tnl modules:
2705  */
2706 struct gl_tnl_module
2707 {
2708    /**
2709     * Vertex format to be lazily swapped into current dispatch.
2710     */
2711    const GLvertexformat *Current;
2712
2713    /**
2714     * \name Record of functions swapped out.
2715     * On restore, only need to swap these functions back in.
2716     */
2717    /*@{*/
2718    struct {
2719        _glapi_proc * location;
2720        _glapi_proc function;
2721    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2722    GLuint SwapCount;
2723    /*@}*/
2724 };
2725
2726 /* Strictly this is a tnl/ private concept, but it doesn't seem
2727  * worthwhile adding a tnl private structure just to hold this one bit
2728  * of information:
2729  */
2730 #define MESA_DLIST_DANGLING_REFS     0x1
2731
2732 /* Provide a location where information about a display list can be
2733  * collected.  Could be extended with driverPrivate structures,
2734  * etc. in the future.
2735  */
2736 struct mesa_display_list
2737 {
2738    Node *node;
2739    GLuint id;
2740    GLbitfield flags;
2741 };
2742
2743
2744 /**
2745  * State used during display list compilation and execution.
2746  */
2747 struct mesa_list_state
2748 {
2749    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2750    GLuint CallDepth;            /**< Current recursion calling depth */
2751
2752    struct mesa_display_list *CurrentList;
2753    Node *CurrentListPtr;        /**< Head of list being compiled */
2754    GLuint CurrentListNum;       /**< Number of the list being compiled */
2755    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2756    GLuint CurrentPos;           /**< Index into current block of nodes */
2757
2758    GLvertexformat ListVtxfmt;
2759
2760    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2761    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2762
2763    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2764    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2765
2766    GLubyte ActiveIndex;
2767    GLfloat CurrentIndex;
2768
2769    GLubyte ActiveEdgeFlag;
2770    GLboolean CurrentEdgeFlag;
2771 };
2772
2773
2774 /**
2775  * Mesa rendering context.
2776  *
2777  * This is the central context data structure for Mesa.  Almost all
2778  * OpenGL state is contained in this structure.
2779  * Think of this as a base class from which device drivers will derive
2780  * sub classes.
2781  *
2782  * The GLcontext typedef names this structure.
2783  */
2784 struct __GLcontextRec
2785 {
2786    /**
2787     * \name OS related interfaces.
2788     *
2789     * These \b must be the first members of this structure, because they are
2790     * exposed to the outside world (i.e. GLX extension).
2791     */
2792    /*@{*/
2793    __GLimports imports;
2794    __GLexports exports;
2795    /*@}*/
2796
2797    /** State possibly shared with other contexts in the address space */
2798    struct gl_shared_state *Shared;
2799
2800    /** \name API function pointer tables */
2801    /*@{*/
2802    struct _glapi_table *Save;   /**< Display list save functions */
2803    struct _glapi_table *Exec;   /**< Execute functions */
2804    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2805    /*@}*/
2806
2807    GLvisual Visual;
2808    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2809    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2810    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2811    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2812
2813    /**
2814     * Device driver function pointer table
2815     */
2816    struct dd_function_table Driver;
2817
2818    void *DriverCtx;     /**< Points to device driver context/state */
2819    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2820
2821    /** Core/Driver constants */
2822    struct gl_constants Const;
2823
2824    /** \name The various 4x4 matrix stacks */
2825    /*@{*/
2826    struct matrix_stack ModelviewMatrixStack;
2827    struct matrix_stack ProjectionMatrixStack;
2828    struct matrix_stack ColorMatrixStack;
2829    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2830    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2831    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2832    /*@}*/
2833
2834    /** Combined modelview and projection matrix */
2835    GLmatrix _ModelProjectMatrix;
2836
2837    /** \name Display lists */
2838    struct mesa_list_state ListState;
2839
2840    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2841    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2842
2843    /** Extension information */
2844    struct gl_extensions Extensions;
2845
2846    /** \name State attribute stack (for glPush/PopAttrib) */
2847    /*@{*/
2848    GLuint AttribStackDepth;
2849    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2850    /*@}*/
2851
2852    /** \name Renderer attribute groups
2853     *
2854     * We define a struct for each attribute group to make pushing and popping
2855     * attributes easy.  Also it's a good organization.
2856     */
2857    /*@{*/
2858    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
2859    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
2860    struct gl_current_attrib     Current;        /**< Current attributes */
2861    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2862    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2863    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2864    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2865    struct gl_light_attrib       Light;          /**< Light attributes */
2866    struct gl_line_attrib        Line;           /**< Line attributes */
2867    struct gl_list_attrib        List;           /**< List attributes */
2868    struct gl_multisample_attrib Multisample;
2869    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2870    struct gl_point_attrib       Point;          /**< Point attributes */
2871    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2872    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2873    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2874    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2875    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2876    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2877    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2878    /*@}*/
2879
2880    /** \name Client attribute stack */
2881    /*@{*/
2882    GLuint ClientAttribStackDepth;
2883    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2884    /*@}*/
2885
2886    /** \name Client attribute groups */
2887    /*@{*/
2888    struct gl_array_attrib       Array;  /**< Vertex arrays */
2889    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2890    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2891    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2892    /*@}*/
2893
2894    /** \name Other assorted state (not pushed/popped on attribute stack) */
2895    /*@{*/
2896    struct gl_histogram_attrib   Histogram;
2897    struct gl_minmax_attrib      MinMax;
2898    struct gl_convolution_attrib Convolution1D;
2899    struct gl_convolution_attrib Convolution2D;
2900    struct gl_convolution_attrib Separable2D;
2901
2902    struct gl_evaluators EvalMap;   /**< All evaluators */
2903    struct gl_feedback   Feedback;  /**< Feedback */
2904    struct gl_selection  Select;    /**< Selection */
2905
2906    struct gl_color_table ColorTable;       /**< Pre-convolution */
2907    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2908    struct gl_color_table PostConvolutionColorTable;
2909    struct gl_color_table ProxyPostConvolutionColorTable;
2910    struct gl_color_table PostColorMatrixColorTable;
2911    struct gl_color_table ProxyPostColorMatrixColorTable;
2912
2913    struct gl_program_state Program;        /**< for vertex or fragment progs */
2914    struct gl_vertex_program_state VertexProgram;   /**< GL_ARB/NV_vertex_program */
2915    struct gl_fragment_program_state FragmentProgram;  /**< GL_ARB/NV_vertex_program */
2916    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
2917
2918    struct gl_fragment_program *_TexEnvProgram;     /**< Texture state as fragment program */
2919    struct gl_vertex_program *_TnlProgram;          /**< Fixed func TNL state as vertex program */
2920
2921    GLboolean _MaintainTnlProgram;
2922    GLboolean _MaintainTexEnvProgram;
2923    GLboolean _UseTexEnvProgram;
2924
2925    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
2926
2927    struct gl_shader_objects_state ShaderObjects;        /* GL_ARB_shader_objects */
2928    /*@}*/
2929
2930 #if FEATURE_EXT_framebuffer_object
2931    struct gl_renderbuffer *CurrentRenderbuffer;
2932 #endif
2933
2934    GLenum ErrorValue;        /**< Last error code */
2935    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2936    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
2937
2938    /** \name Derived state */
2939    /*@{*/
2940    GLbitfield _TriangleCaps;      /**< bitwise-or of DD_* flags */
2941    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2942    GLfloat _EyeZDir[3];
2943    GLfloat _ModelViewInvScale;
2944    GLboolean _NeedEyeCoords;
2945    GLboolean _ForceEyeCoords;
2946    GLenum _CurrentProgram;    /* currently executing program */
2947
2948    GLuint TextureStateTimestamp; /* detect changes to shared state */
2949
2950    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2951    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2952    /**@}*/
2953
2954    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2955
2956
2957    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2958                     *
2959                     * We don't have a better way to communicate this value from
2960                     * swrast_setup to swrast. */
2961
2962    /** \name For debugging/development only */
2963    /*@{*/
2964    GLboolean FirstTimeCurrent;
2965    /*@}*/
2966
2967    /** Dither disable via MESA_NO_DITHER env var */
2968    GLboolean NoDither;
2969
2970    /** software compression/decompression supported or not */
2971    GLboolean Mesa_DXTn;
2972
2973    /** Core tnl module support */
2974    struct gl_tnl_module TnlModule;
2975
2976    /**
2977     * \name Hooks for module contexts.
2978     *
2979     * These will eventually live in the driver or elsewhere.
2980     */
2981    /*@{*/
2982    void *swrast_context;
2983    void *swsetup_context;
2984    void *swtnl_context;
2985    void *swtnl_im;
2986    void *acache_context;
2987    void *aelt_context;
2988    /*@}*/
2989 };
2990
2991
2992 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2993 extern const char *_mesa_prim_name[GL_POLYGON+4];
2994
2995
2996 #ifdef DEBUG
2997 extern int MESA_VERBOSE;
2998 extern int MESA_DEBUG_FLAGS;
2999 # define MESA_FUNCTION __FUNCTION__
3000 #else
3001 # define MESA_VERBOSE 0
3002 # define MESA_DEBUG_FLAGS 0
3003 # define MESA_FUNCTION "a function"
3004 # ifndef NDEBUG
3005 #  define NDEBUG
3006 # endif
3007 #endif
3008
3009
3010 enum _verbose
3011 {
3012    VERBOSE_VARRAY               = 0x0001,
3013    VERBOSE_TEXTURE              = 0x0002,
3014    VERBOSE_IMMEDIATE            = 0x0004,
3015    VERBOSE_PIPELINE             = 0x0008,
3016    VERBOSE_DRIVER               = 0x0010,
3017    VERBOSE_STATE                = 0x0020,
3018    VERBOSE_API                  = 0x0040,
3019    VERBOSE_DISPLAY_LIST         = 0x0100,
3020    VERBOSE_LIGHTING             = 0x0200,
3021    VERBOSE_PRIMS                = 0x0400,
3022    VERBOSE_VERTS                = 0x0800,
3023    VERBOSE_DISASSEM             = 0x1000
3024 };
3025
3026
3027 enum _debug
3028 {
3029    DEBUG_ALWAYS_FLUSH           = 0x1
3030 };
3031
3032
3033
3034 #define Elements(x) sizeof(x)/sizeof(*(x))
3035
3036
3037 #endif /* TYPES_H */