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  * A pixelmap (see glPixelMap)
 969  */
 970 struct gl_pixelmap
 971 {
 972    GLint Size;
 973    GLfloat Map[MAX_PIXEL_MAP_TABLE];
 974    GLubyte Map8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 975 };
 976
 977
 978 /**
 979  * Collection of all pixelmaps
 980  */
 981 struct gl_pixelmaps
 982 {
 983    struct gl_pixelmap RtoR;  /**< i.e. GL_PIXEL_MAP_R_TO_R */
 984    struct gl_pixelmap GtoG;
 985    struct gl_pixelmap BtoB;
 986    struct gl_pixelmap AtoA;
 987    struct gl_pixelmap ItoR;
 988    struct gl_pixelmap ItoG;
 989    struct gl_pixelmap ItoB;
 990    struct gl_pixelmap ItoA;
 991    struct gl_pixelmap ItoI;
 992    struct gl_pixelmap StoS;
 993 };
 994
 995
 996 /**
 997  * Pixel attribute group (GL_PIXEL_MODE_BIT).
 998  */
 999 struct gl_pixel_attrib
1000 {
1001    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
1002
1003    /*--- Begin Pixel Transfer State ---*/
1004    /* Fields are in the order in which they're applied... */
1005
1006    /* Scale & Bias (index shift, offset) */
1007    GLfloat RedBias, RedScale;
1008    GLfloat GreenBias, GreenScale;
1009    GLfloat BlueBias, BlueScale;
1010    GLfloat AlphaBias, AlphaScale;
1011    GLfloat DepthBias, DepthScale;
1012    GLint IndexShift, IndexOffset;
1013
1014    /* Pixel Maps */
1015    /* Note: actual pixel maps are not part of this attrib group */
1016    GLboolean MapColorFlag;
1017    GLboolean MapStencilFlag;
1018
1019    /* Color table lookup (GL_SGI_color_table) */
1020    /* Note: actual table is not part of this attrib group */
1021    GLfloat ColorTableScale[4];
1022    GLfloat ColorTableBias[4];
1023    GLboolean ColorTableEnabled;
1024
1025    /* Convolution (GL_EXT_convolution) */
1026    GLboolean Convolution1DEnabled;
1027    GLboolean Convolution2DEnabled;
1028    GLboolean Separable2DEnabled;
1029    GLfloat ConvolutionBorderColor[3][4];
1030    GLenum ConvolutionBorderMode[3];
1031    GLfloat ConvolutionFilterScale[3][4];  /**< RGBA */
1032    GLfloat ConvolutionFilterBias[3][4];   /**< RGBA */
1033    GLfloat PostConvolutionScale[4];  /**< RGBA */
1034    GLfloat PostConvolutionBias[4];   /**< RGBA */
1035
1036    /* Post-convolution color table */
1037    /* Note: actual table is not part of this attrib group */
1038    GLboolean PostConvolutionColorTableEnabled;
1039    GLfloat PCCTscale[4];  /** Post Convolution Color Table scale */
1040    GLfloat PCCTbias[4];   /** Post Convolution Color Table bias */
1041
1042    /* Color matrix (GL_SGI_color_matrix) */
1043    /* Note: the color matrix is not part of this attrib group */
1044    GLfloat PostColorMatrixScale[4];  /**< RGBA */
1045    GLfloat PostColorMatrixBias[4];   /**< RGBA */
1046
1047    /* Post color matrix color table */
1048    /* Note: actual table is not part of this attrib group */
1049    GLboolean PostColorMatrixColorTableEnabled;
1050    GLfloat PCMCTscale[4]; /** Post Color Matrix Color Table scale */
1051    GLfloat PCMCTbias[4];  /** Post Color Matrix Color Table bias */
1052
1053    /* Histogram & minmax (GL_EXT_histogram) */
1054    /* Note: histogram and minmax data are not part of this attrib group */
1055    GLboolean HistogramEnabled;
1056    GLboolean MinMaxEnabled;
1057
1058    /*--- End Pixel Transfer State ---*/
1059
1060    /* Pixel Zoom */
1061    GLfloat ZoomX, ZoomY;
1062
1063    /** GL_SGI_texture_color_table */
1064    GLfloat TextureColorTableScale[4];
1065    GLfloat TextureColorTableBias[4];
1066 };
1067
1068
1069 /**
1070  * Point attribute group (GL_POINT_BIT).
1071  */
1072 struct gl_point_attrib
1073 {
1074    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1075    GLfloat Size;                /**< User-specified point size */
1076    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
1077    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1078    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1079    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1080    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1081    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
1082    GLboolean CoordReplace[MAX_TEXTURE_COORD_UNITS]; /**< GL_ARB_point_sprite */
1083    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1084    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1085 };
1086
1087
1088 /**
1089  * Polygon attribute group (GL_POLYGON_BIT).
1090  */
1091 struct gl_polygon_attrib
1092 {
1093    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1094    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1095    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1096    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1097    GLboolean CullFlag;          /**< Culling on/off flag */
1098    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1099    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1100    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1101    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1102    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1103    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1104    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1105    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1106 };
1107
1108
1109 /**
1110  * Scissor attributes (GL_SCISSOR_BIT).
1111  */
1112 struct gl_scissor_attrib
1113 {
1114    GLboolean Enabled;           /**< Scissor test enabled? */
1115    GLint X, Y;                  /**< Lower left corner of box */
1116    GLsizei Width, Height;       /**< Size of box */
1117 };
1118
1119
1120 /**
1121  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1122  */
1123 struct gl_stencil_attrib
1124 {
1125    GLboolean Enabled;           /**< Enabled flag */
1126    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1127    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1128    GLboolean _TestTwoSide;
1129    GLenum Function[2];          /**< Stencil function */
1130    GLenum FailFunc[2];          /**< Fail function */
1131    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1132    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1133    GLint Ref[2];                /**< Reference value */
1134    GLuint ValueMask[2];         /**< Value mask */
1135    GLuint WriteMask[2];         /**< Write mask */
1136    GLuint Clear;                /**< Clear value */
1137 };
1138
1139
1140 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
1141
1142 /**
1143  * An index for each type of texture object
1144  */
1145 /*@{*/
1146 #define TEXTURE_1D_INDEX    0
1147 #define TEXTURE_2D_INDEX    1
1148 #define TEXTURE_3D_INDEX    2
1149 #define TEXTURE_CUBE_INDEX  3
1150 #define TEXTURE_RECT_INDEX  4
1151 /*@}*/
1152
1153 /**
1154  * Bit flags for each type of texture object
1155  * Used for Texture.Unit[]._ReallyEnabled flags.
1156  */
1157 /*@{*/
1158 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
1159 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
1160 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
1161 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
1162 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
1163 /*@}*/
1164
1165
1166 /**
1167  * TexGenEnabled flags.
1168  */
1169 /*@{*/
1170 #define S_BIT 1
1171 #define T_BIT 2
1172 #define R_BIT 4
1173 #define Q_BIT 8
1174 /*@}*/
1175
1176
1177 /**
1178  * Bit flag versions of the corresponding GL_ constants.
1179  */
1180 /*@{*/
1181 #define TEXGEN_SPHERE_MAP        0x1
1182 #define TEXGEN_OBJ_LINEAR        0x2
1183 #define TEXGEN_EYE_LINEAR        0x4
1184 #define TEXGEN_REFLECTION_MAP_NV 0x8
1185 #define TEXGEN_NORMAL_MAP_NV     0x10
1186
1187 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1188                                   TEXGEN_REFLECTION_MAP_NV | \
1189                                   TEXGEN_NORMAL_MAP_NV)
1190 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1191                                   TEXGEN_REFLECTION_MAP_NV | \
1192                                   TEXGEN_NORMAL_MAP_NV     | \
1193                                   TEXGEN_EYE_LINEAR)
1194 /*@}*/
1195
1196
1197 /* A selection of state flags to make driver and module's lives easier. */
1198 #define ENABLE_TEXGEN0        0x1
1199 #define ENABLE_TEXGEN1        0x2
1200 #define ENABLE_TEXGEN2        0x4
1201 #define ENABLE_TEXGEN3        0x8
1202 #define ENABLE_TEXGEN4        0x10
1203 #define ENABLE_TEXGEN5        0x20
1204 #define ENABLE_TEXGEN6        0x40
1205 #define ENABLE_TEXGEN7        0x80
1206
1207 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1208 #define ENABLE_TEXMAT1        0x2
1209 #define ENABLE_TEXMAT2        0x4
1210 #define ENABLE_TEXMAT3        0x8
1211 #define ENABLE_TEXMAT4        0x10
1212 #define ENABLE_TEXMAT5        0x20
1213 #define ENABLE_TEXMAT6        0x40
1214 #define ENABLE_TEXMAT7        0x80
1215
1216 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1217 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1218
1219
1220 /**
1221  * Texel fetch function prototype.  We use texel fetch functions to
1222  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1223  * texture images.  These functions help to isolate us from the gritty
1224  * details of all the various texture image encodings.
1225  *
1226  * \param texImage texture image.
1227  * \param col texel column.
1228  * \param row texel row.
1229  * \param img texel image level/layer.
1230  * \param texelOut output texel (up to 4 GLchans)
1231  */
1232 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1233                                  GLint col, GLint row, GLint img,
1234                                  GLchan *texelOut );
1235
1236 /**
1237  * As above, but returns floats.
1238  * Used for depth component images and for upcoming signed/float
1239  * texture images.
1240  */
1241 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1242                                  GLint col, GLint row, GLint img,
1243                                  GLfloat *texelOut );
1244
1245
1246 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1247                                GLint col, GLint row, GLint img,
1248                                const void *texel);
1249
1250
1251 /**
1252  * This macro defines the (many) parameters to the texstore functions.
1253  * \param dims  either 1 or 2 or 3
1254  * \param baseInternalFormat  user-specified base internal format
1255  * \param dstFormat  destination Mesa texture format
1256  * \param dstAddr  destination image address
1257  * \param dstX/Y/Zoffset  destination x/y/z offset (ala TexSubImage), in texels
1258  * \param dstRowStride  destination image row stride, in bytes
1259  * \param dstImageOffsets  offset of each 2D slice within 3D texture, in texels
1260  * \param srcWidth/Height/Depth  source image size, in pixels
1261  * \param srcFormat  incoming image format
1262  * \param srcType  incoming image data type
1263  * \param srcAddr  source image address
1264  * \param srcPacking  source image packing parameters
1265  */
1266 #define TEXSTORE_PARAMS \
1267         GLcontext *ctx, GLuint dims, \
1268         GLenum baseInternalFormat, \
1269         const struct gl_texture_format *dstFormat, \
1270         GLvoid *dstAddr, \
1271         GLint dstXoffset, GLint dstYoffset, GLint dstZoffset, \
1272         GLint dstRowStride, const GLuint *dstImageOffsets, \
1273         GLint srcWidth, GLint srcHeight, GLint srcDepth, \
1274         GLenum srcFormat, GLenum srcType, \
1275         const GLvoid *srcAddr, \
1276         const struct gl_pixelstore_attrib *srcPacking
1277
1278
1279
1280 /**
1281  * Texture image storage function.
1282  */
1283 typedef GLboolean (*StoreTexImageFunc)(TEXSTORE_PARAMS);
1284
1285
1286 /**
1287  * Texture format record
1288  */
1289 struct gl_texture_format
1290 {
1291    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1292
1293    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1294                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1295                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1296                                  *   GL_DEPTH_COMPONENT.
1297                                  */
1298    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1299    GLubyte RedBits;             /**< Bits per texel component */
1300    GLubyte GreenBits;           /**< These are just rough approximations for */
1301    GLubyte BlueBits;            /**< compressed texture formats. */
1302    GLubyte AlphaBits;
1303    GLubyte LuminanceBits;
1304    GLubyte IntensityBits;
1305    GLubyte IndexBits;
1306    GLubyte DepthBits;
1307    GLubyte StencilBits;         /**< GL_EXT_packed_depth_stencil */
1308
1309    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1310
1311    StoreTexImageFunc StoreImage;
1312
1313    /**
1314     * \name Texel fetch function pointers
1315     */
1316    /*@{*/
1317    FetchTexelFuncC FetchTexel1D;
1318    FetchTexelFuncC FetchTexel2D;
1319    FetchTexelFuncC FetchTexel3D;
1320    FetchTexelFuncF FetchTexel1Df;
1321    FetchTexelFuncF FetchTexel2Df;
1322    FetchTexelFuncF FetchTexel3Df;
1323    /*@}*/
1324
1325    StoreTexelFunc StoreTexel;
1326 };
1327
1328
1329 #define MAX_3D_TEXTURE_SIZE (1 << (MAX_3D_TEXTURE_LEVELS - 1))
1330
1331 /**
1332  * Texture image state.  Describes the dimensions of a texture image,
1333  * the texel format and pointers to Texel Fetch functions.
1334  */
1335 struct gl_texture_image
1336 {
1337    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1338                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1339                                  *   GL_INTENSITY, GL_COLOR_INDEX,
1340                                  *   GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT
1341                                  *   only. Used for choosing TexEnv arithmetic.
1342                                  */
1343    GLint InternalFormat;        /**< Internal format as given by the user */
1344    GLuint Border;               /**< 0 or 1 */
1345    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1346    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1347    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1348    GLuint Width2;               /**< = Width - 2*Border */
1349    GLuint Height2;              /**< = Height - 2*Border */
1350    GLuint Depth2;               /**< = Depth - 2*Border */
1351    GLuint WidthLog2;            /**< = log2(Width2) */
1352    GLuint HeightLog2;           /**< = log2(Height2) */
1353    GLuint DepthLog2;            /**< = log2(Depth2) */
1354    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1355    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1356    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1357    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1358    GLboolean IsClientData;      /**< Data owned by client? */
1359    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1360
1361    const struct gl_texture_format *TexFormat;
1362
1363    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1364
1365    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1366    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1367
1368    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1369    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1370
1371    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1372    GLuint *ImageOffsets;        /**< if 3D texture: array [Depth] of offsets to
1373                                      each 2D slice in 'Data', in texels */
1374    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1375
1376    /**
1377     * \name For device driver:
1378     */
1379    /*@{*/
1380    void *DriverData;            /**< Arbitrary device driver data */
1381    /*@}*/
1382 };
1383
1384
1385 /**
1386  * Indexes for cube map faces.
1387  */
1388 /*@{*/
1389 #define FACE_POS_X   0
1390 #define FACE_NEG_X   1
1391 #define FACE_POS_Y   2
1392 #define FACE_NEG_Y   3
1393 #define FACE_POS_Z   4
1394 #define FACE_NEG_Z   5
1395 #define MAX_FACES  6
1396 /*@}*/
1397
1398
1399 /**
1400  * Texture object state.  Contains the array of mipmap images, border color,
1401  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1402  * color palette.
1403  */
1404 struct gl_texture_object
1405 {
1406    _glthread_Mutex Mutex;       /**< for thread safety */
1407    GLint RefCount;              /**< reference count */
1408    GLuint Name;                 /**< the user-visible texture object ID */
1409    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1410    GLfloat Priority;            /**< in [0,1] */
1411    GLfloat BorderColor[4];      /**< unclamped */
1412    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1413    GLenum WrapS;                /**< S-axis texture image wrap mode */
1414    GLenum WrapT;                /**< T-axis texture image wrap mode */
1415    GLenum WrapR;                /**< R-axis texture image wrap mode */
1416    GLenum MinFilter;            /**< minification filter */
1417    GLenum MagFilter;            /**< magnification filter */
1418    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1419    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1420    GLfloat LodBias;             /**< OpenGL 1.4 */
1421    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1422    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1423    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1424    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1425    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1426    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1427    GLenum CompareMode;          /**< GL_ARB_shadow */
1428    GLenum CompareFunc;          /**< GL_ARB_shadow */
1429    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1430    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1431    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1432    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1433    GLboolean Complete;          /**< Is texture object complete? */
1434
1435    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1436    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1437
1438    /** GL_EXT_paletted_texture */
1439    struct gl_color_table Palette;
1440
1441
1442    /**
1443     * \name For device driver.
1444     * Note: instead of attaching driver data to this pointer, it's preferable
1445     * to instead use this struct as a base class for your own texture object
1446     * class.  Driver->NewTextureObject() can be used to implement the
1447     * allocation.
1448     */
1449    void *DriverData;    /**< Arbitrary device driver data */
1450 };
1451
1452
1453 /**
1454  * Texture combine environment state.
1455  *
1456  * \todo
1457  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1458  * structure will need to be expanded for 4 elements.
1459  */
1460 struct gl_tex_env_combine_state
1461 {
1462    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1463    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1464    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1465    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1466    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1467    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1468    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1469    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1470    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1471    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1472 };
1473
1474
1475 /**
1476  * Texture unit state.  Contains enable flags, texture environment/function/
1477  * combiners, texgen state, pointers to current texture objects and
1478  * post-filter color tables.
1479  */
1480 struct gl_texture_unit
1481 {
1482    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1483    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1484
1485    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1486    GLfloat EnvColor[4];
1487    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1488    /** \name Tex coord generation mode
1489     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1490    /*@{*/
1491    GLenum GenModeS;
1492    GLenum GenModeT;
1493    GLenum GenModeR;
1494    GLenum GenModeQ;
1495    /*@}*/
1496    GLbitfield _GenBitS;
1497    GLbitfield _GenBitT;
1498    GLbitfield _GenBitR;
1499    GLbitfield _GenBitQ;
1500    GLbitfield _GenFlags;        /**< bitwise or of GenBit[STRQ] */
1501    GLfloat ObjectPlaneS[4];
1502    GLfloat ObjectPlaneT[4];
1503    GLfloat ObjectPlaneR[4];
1504    GLfloat ObjectPlaneQ[4];
1505    GLfloat EyePlaneS[4];
1506    GLfloat EyePlaneT[4];
1507    GLfloat EyePlaneR[4];
1508    GLfloat EyePlaneQ[4];
1509    GLfloat LodBias;             /**< for biasing mipmap levels */
1510
1511    /**
1512     * \name GL_EXT_texture_env_combine
1513     */
1514    struct gl_tex_env_combine_state Combine;
1515
1516    /**
1517     * Derived state based on \c EnvMode and the \c BaseFormat of the
1518     * currently enabled texture.
1519     */
1520    struct gl_tex_env_combine_state _EnvMode;
1521
1522    /**
1523     * Currently enabled combiner state.  This will point to either
1524     * \c Combine or \c _EnvMode.
1525     */
1526    struct gl_tex_env_combine_state *_CurrentCombine;
1527
1528    struct gl_texture_object *Current1D;
1529    struct gl_texture_object *Current2D;
1530    struct gl_texture_object *Current3D;
1531    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1532    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1533
1534    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1535
1536    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1537    struct gl_texture_object Saved2D;
1538    struct gl_texture_object Saved3D;
1539    struct gl_texture_object SavedCubeMap;
1540    struct gl_texture_object SavedRect;
1541
1542    /* GL_SGI_texture_color_table */
1543    struct gl_color_table ColorTable;
1544    struct gl_color_table ProxyColorTable;
1545    GLboolean ColorTableEnabled;
1546 };
1547
1548 struct texenvprog_cache_item {
1549    GLuint hash;
1550    void *key;
1551    struct gl_fragment_program *data;
1552    struct texenvprog_cache_item *next;
1553 };
1554
1555 struct texenvprog_cache {
1556    struct texenvprog_cache_item **items;
1557    GLuint size, n_items;
1558    GLcontext *ctx;
1559 };
1560
1561 /**
1562  * Texture attribute group (GL_TEXTURE_BIT).
1563  */
1564 struct gl_texture_attrib
1565 {
1566    /**
1567     * name multitexture
1568     */
1569    /**@{*/
1570    GLuint CurrentUnit;         /**< Active texture unit */
1571    GLbitfield _EnabledUnits;  /**< one bit set for each really-enabled unit */
1572    GLbitfield _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1573    GLbitfield _GenFlags;            /**< for texgen */
1574    GLbitfield _TexGenEnabled;
1575    GLbitfield _TexMatEnabled;
1576    /**@}*/
1577
1578    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1579
1580    struct gl_texture_object *Proxy1D;
1581    struct gl_texture_object *Proxy2D;
1582    struct gl_texture_object *Proxy3D;
1583    struct gl_texture_object *ProxyCubeMap;
1584    struct gl_texture_object *ProxyRect;
1585
1586    /** GL_EXT_shared_texture_palette */
1587    GLboolean SharedPalette;
1588    struct gl_color_table Palette;
1589
1590    /** Cached texenv fragment programs */
1591    struct texenvprog_cache env_fp_cache;
1592 };
1593
1594
1595 /**
1596  * Transformation attribute group (GL_TRANSFORM_BIT).
1597  */
1598 struct gl_transform_attrib
1599 {
1600    GLenum MatrixMode;                           /**< Matrix mode */
1601    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1602    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1603    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1604    GLboolean Normalize;                         /**< Normalize all normals? */
1605    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1606    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1607
1608    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1609    GLfloat CullEyePos[4];
1610    GLfloat CullObjPos[4];
1611 };
1612
1613
1614 /**
1615  * Viewport attribute group (GL_VIEWPORT_BIT).
1616  */
1617 struct gl_viewport_attrib
1618 {
1619    GLint X, Y;                  /**< position */
1620    GLsizei Width, Height;       /**< size */
1621    GLfloat Near, Far;           /**< Depth buffer range */
1622    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1623 };
1624
1625
1626 /**
1627  * Node for the attribute stack.
1628  */
1629 struct gl_attrib_node
1630 {
1631    GLbitfield kind;
1632    void *data;
1633    struct gl_attrib_node *next;
1634 };
1635
1636
1637 /**
1638  * GL_ARB_vertex/pixel_buffer_object buffer object
1639  */
1640 struct gl_buffer_object
1641 {
1642    GLint RefCount;
1643    GLuint Name;
1644    GLenum Usage;
1645    GLenum Access;
1646    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1647    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1648    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1649    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1650 };
1651
1652
1653
1654 /**
1655  * Client pixel packing/unpacking attributes
1656  */
1657 struct gl_pixelstore_attrib
1658 {
1659    GLint Alignment;
1660    GLint RowLength;
1661    GLint SkipPixels;
1662    GLint SkipRows;
1663    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1664    GLint SkipImages;      /**< for GL_EXT_texture3D */
1665    GLboolean SwapBytes;
1666    GLboolean LsbFirst;
1667    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1668    GLboolean Invert;        /**< GL_MESA_pack_invert */
1669    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1670 };
1671
1672
1673
1674 /**
1675  * Client vertex array attributes
1676  */
1677 struct gl_client_array
1678 {
1679    GLint Size;                  /**< components per element (1,2,3,4) */
1680    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1681    GLsizei Stride;              /**< user-specified stride */
1682    GLsizei StrideB;             /**< actual stride in bytes */
1683    const GLubyte *Ptr;          /**< Points to array data */
1684    GLboolean Enabled;           /**< Enabled flag is a boolean */
1685    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1686
1687    /**< GL_ARB_vertex_buffer_object */
1688    struct gl_buffer_object *BufferObj;
1689    GLuint _MaxElement;
1690 };
1691
1692
1693 /**
1694  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1695  * extension, but a nice encapsulation in any case.
1696  */
1697 struct gl_array_object
1698 {
1699    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1700    GLuint Name;
1701
1702    /** Conventional vertex arrays */
1703    /*@{*/
1704    struct gl_client_array Vertex;
1705    struct gl_client_array Normal;
1706    struct gl_client_array Color;
1707    struct gl_client_array SecondaryColor;
1708    struct gl_client_array FogCoord;
1709    struct gl_client_array Index;
1710    struct gl_client_array EdgeFlag;
1711    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1712    /*@}*/
1713
1714    /** Generic arrays for vertex programs/shaders */
1715    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1716
1717    /** Mask of _NEW_ARRAY_* values indicating which arrays are enabled */
1718    GLbitfield _Enabled;
1719 };
1720
1721
1722 /**
1723  * Vertex array state
1724  */
1725 struct gl_array_attrib
1726 {
1727    struct gl_array_object *ArrayObj;
1728    struct gl_array_object *DefaultArrayObj;
1729
1730    GLint ActiveTexture;         /**< Client Active Texture */
1731    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1732    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1733
1734    GLbitfield NewState;         /**< mask of _NEW_ARRAY_* values */
1735
1736 #if FEATURE_ARB_vertex_buffer_object
1737    struct gl_buffer_object *NullBufferObj;
1738    struct gl_buffer_object *ArrayBufferObj;
1739    struct gl_buffer_object *ElementArrayBufferObj;
1740 #endif
1741    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1742 };
1743
1744
1745 /**
1746  * Feedback buffer state
1747  */
1748 struct gl_feedback
1749 {
1750    GLenum Type;
1751    GLbitfield _Mask;            /* FB_* bits */
1752    GLfloat *Buffer;
1753    GLuint BufferSize;
1754    GLuint Count;
1755 };
1756
1757
1758 /**
1759  * Selection buffer state
1760  */
1761 struct gl_selection
1762 {
1763    GLuint *Buffer;      /**< selection buffer */
1764    GLuint BufferSize;   /**< size of the selection buffer */
1765    GLuint BufferCount;  /**< number of values in the selection buffer */
1766    GLuint Hits;         /**< number of records in the selection buffer */
1767    GLuint NameStackDepth; /**< name stack depth */
1768    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1769    GLboolean HitFlag;   /**< hit flag */
1770    GLfloat HitMinZ;     /**< minimum hit depth */
1771    GLfloat HitMaxZ;     /**< maximum hit depth */
1772 };
1773
1774
1775 /**
1776  * 1-D Evaluator control points
1777  */
1778 struct gl_1d_map
1779 {
1780    GLuint Order;        /**< Number of control points */
1781    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1782    GLfloat *Points;     /**< Points to contiguous control points */
1783 };
1784
1785
1786 /**
1787  * 2-D Evaluator control points
1788  */
1789 struct gl_2d_map
1790 {
1791    GLuint Uorder;               /**< Number of control points in U dimension */
1792    GLuint Vorder;               /**< Number of control points in V dimension */
1793    GLfloat u1, u2, du;
1794    GLfloat v1, v2, dv;
1795    GLfloat *Points;             /**< Points to contiguous control points */
1796 };
1797
1798
1799 /**
1800  * All evaluator control point state
1801  */
1802 struct gl_evaluators
1803 {
1804    /**
1805     * \name 1-D maps
1806     */
1807    /*@{*/
1808    struct gl_1d_map Map1Vertex3;
1809    struct gl_1d_map Map1Vertex4;
1810    struct gl_1d_map Map1Index;
1811    struct gl_1d_map Map1Color4;
1812    struct gl_1d_map Map1Normal;
1813    struct gl_1d_map Map1Texture1;
1814    struct gl_1d_map Map1Texture2;
1815    struct gl_1d_map Map1Texture3;
1816    struct gl_1d_map Map1Texture4;
1817    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1818    /*@}*/
1819
1820    /**
1821     * \name 2-D maps
1822     */
1823    /*@{*/
1824    struct gl_2d_map Map2Vertex3;
1825    struct gl_2d_map Map2Vertex4;
1826    struct gl_2d_map Map2Index;
1827    struct gl_2d_map Map2Color4;
1828    struct gl_2d_map Map2Normal;
1829    struct gl_2d_map Map2Texture1;
1830    struct gl_2d_map Map2Texture2;
1831    struct gl_2d_map Map2Texture3;
1832    struct gl_2d_map Map2Texture4;
1833    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1834    /*@}*/
1835 };
1836
1837
1838 /**
1839  * Names of the various vertex/fragment program register files, etc.
1840  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1841  * All values should fit in a 4-bit field.
1842  */
1843 enum register_file
1844 {
1845    PROGRAM_TEMPORARY = 0,
1846    PROGRAM_LOCAL_PARAM = 1,
1847    PROGRAM_ENV_PARAM = 2,
1848    PROGRAM_STATE_VAR = 3,
1849    PROGRAM_INPUT = 4,
1850    PROGRAM_OUTPUT = 5,
1851    PROGRAM_NAMED_PARAM = 6,
1852    PROGRAM_CONSTANT = 7,
1853    PROGRAM_WRITE_ONLY = 8,
1854    PROGRAM_ADDRESS = 9,
1855    PROGRAM_UNDEFINED = 10,  /* invalid value */
1856    PROGRAM_FILE_MAX
1857 };
1858
1859
1860 /** Vertex and fragment instructions */
1861 struct prog_instruction;
1862 struct gl_program_parameter_list;
1863
1864
1865 /**
1866  * Base class for any kind of program object
1867  */
1868 struct gl_program
1869 {
1870    GLuint Id;
1871    GLubyte *String;          /**< Null-terminated program text */
1872    GLint RefCount;
1873    GLenum Target;
1874    GLenum Format;            /**< String encoding format */
1875    GLboolean Resident;
1876
1877    struct prog_instruction *Instructions;
1878
1879    GLbitfield InputsRead;     /* Bitmask of which input regs are read */
1880    GLbitfield OutputsWritten; /* Bitmask of which output regs are written to */
1881
1882    /** Named parameters, constants, etc. from program text */
1883    struct gl_program_parameter_list *Parameters;
1884    /** Numbered local parameters */
1885    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1886
1887    /** Logical counts */
1888    /*@{*/
1889    GLuint NumInstructions;
1890    GLuint NumTemporaries;
1891    GLuint NumParameters;
1892    GLuint NumAttributes;
1893    GLuint NumAddressRegs;
1894    /*@}*/
1895    /** Native, actual h/w counts */
1896    /*@{*/
1897    GLuint NumNativeInstructions;
1898    GLuint NumNativeTemporaries;
1899    GLuint NumNativeParameters;
1900    GLuint NumNativeAttributes;
1901    GLuint NumNativeAddressRegs;
1902    /*@}*/
1903 };
1904
1905
1906 /** Vertex program object */
1907 struct gl_vertex_program
1908 {
1909    struct gl_program Base;   /**< base class */
1910    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1911    GLboolean IsPositionInvariant;
1912    void *TnlData;               /**< should probably use Base.DriverData */
1913 };
1914
1915
1916 /** Fragment program object */
1917 struct gl_fragment_program
1918 {
1919    struct gl_program Base;   /**< base class */
1920    GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1921    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1922    GLuint NumTexInstructions;
1923    GLuint NumTexIndirections;
1924    GLuint NumNativeAluInstructions; /**< GL_ARB_fragment_program */
1925    GLuint NumNativeTexInstructions;
1926    GLuint NumNativeTexIndirections;
1927    GLenum FogOption;
1928    GLboolean UsesKill;
1929 };
1930
1931
1932 /**
1933  * State common to vertex and fragment programs.
1934  */
1935 struct gl_program_state
1936 {
1937    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1938    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1939 };
1940
1941
1942 /**
1943  * Context state for vertex programs.
1944  */
1945 struct gl_vertex_program_state
1946 {
1947    GLboolean Enabled;               /**< GL_VERTEX_PROGRAM_ARB/NV */
1948    GLboolean _Enabled;              /**< Enabled and valid program? */
1949    GLboolean PointSizeEnabled;      /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1950    GLboolean TwoSideEnabled;        /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1951    struct gl_vertex_program *Current;  /**< ptr to currently bound program */
1952    const struct gl_vertex_program *_Current;    /**< ptr to currently bound
1953                                                   program, including internal
1954                                                   (t_vp_build.c) programs */
1955
1956    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /**< Env params */
1957
1958    /* For GL_NV_vertex_program only: */
1959    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1960    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1961
1962 #if FEATURE_MESA_program_debug
1963    GLprogramcallbackMESA Callback;
1964    GLvoid *CallbackData;
1965    GLboolean CallbackEnabled;
1966    GLuint CurrentPosition;
1967 #endif
1968 };
1969
1970
1971 /**
1972  * Context state for fragment programs.
1973  */
1974 struct gl_fragment_program_state
1975 {
1976    GLboolean Enabled;     /**< User-set fragment program enable flag */
1977    GLboolean _Enabled;    /**< Fragment program enabled and valid? */
1978    GLboolean _Active;     /**< Is a user program or internal program active? */
1979    struct gl_fragment_program *Current;  /**< User-bound program */
1980    const struct gl_fragment_program *_Current; /**< currently active program
1981                                                (including internal programs) */
1982    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /**< Env params */
1983
1984 #if FEATURE_MESA_program_debug
1985    GLprogramcallbackMESA Callback;
1986    GLvoid *CallbackData;
1987    GLboolean CallbackEnabled;
1988    GLuint CurrentPosition;
1989 #endif
1990 };
1991
1992
1993 /**
1994  * ATI_fragment_shader runtime state
1995  */
1996 #define ATI_FS_INPUT_PRIMARY 0
1997 #define ATI_FS_INPUT_SECONDARY 1
1998
1999 struct atifs_instruction;
2000 struct atifs_setupinst;
2001
2002 /**
2003  * ATI fragment shader
2004  */
2005 struct ati_fragment_shader
2006 {
2007    GLuint Id;
2008    GLint RefCount;
2009    struct atifs_instruction *Instructions[2];
2010    struct atifs_setupinst *SetupInst[2];
2011    GLfloat Constants[8][4];
2012    GLbitfield LocalConstDef;  /** Indicates which constants have been set */
2013    GLubyte numArithInstr[2];
2014    GLubyte regsAssigned[2];
2015    GLubyte NumPasses;         /** 1 or 2 */
2016    GLubyte cur_pass;
2017    GLubyte last_optype;
2018    GLboolean interpinp1;
2019    GLboolean isValid;
2020    GLuint swizzlerq;
2021 };
2022
2023 /**
2024  * Context state for GL_ATI_fragment_shader
2025  */
2026 struct gl_ati_fragment_shader_state
2027 {
2028    GLboolean Enabled;
2029    GLboolean _Enabled;                      /** enabled and valid shader? */
2030    GLboolean Compiling;
2031    GLfloat GlobalConstants[8][4];
2032    struct ati_fragment_shader *Current;
2033 };
2034
2035
2036 /**
2037  * Occlusion/timer query object.
2038  */
2039 struct gl_query_object
2040 {
2041    GLuint Id;
2042    GLuint64EXT Result; /* the counter */
2043    GLboolean Active;   /* inside Begin/EndQuery */
2044    GLboolean Ready;    /* result is ready */
2045 };
2046
2047
2048 /**
2049  * Context state for query objects.
2050  */
2051 struct gl_query_state
2052 {
2053    struct _mesa_HashTable *QueryObjects;
2054    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2055    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2056 };
2057
2058
2059 /**
2060  * Context state for vertex/fragment shaders.
2061  */
2062 struct gl_shader_objects_state
2063 {
2064    struct gl2_program_intf **CurrentProgram;
2065    GLboolean _VertexShaderPresent;
2066    GLboolean _FragmentShaderPresent;
2067 };
2068
2069
2070 /**
2071  * State which can be shared by multiple contexts:
2072  */
2073 struct gl_shared_state
2074 {
2075    _glthread_Mutex Mutex;                  /**< for thread safety */
2076    GLint RefCount;                         /**< Reference count */
2077    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2078    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2079
2080    /**
2081     * \name Default texture objects (shared by all multi-texture units)
2082     */
2083    /*@{*/
2084    struct gl_texture_object *Default1D;
2085    struct gl_texture_object *Default2D;
2086    struct gl_texture_object *Default3D;
2087    struct gl_texture_object *DefaultCubeMap;
2088    struct gl_texture_object *DefaultRect;
2089    /*@}*/
2090
2091    /**
2092     * \name Thread safety and statechange notification for texture
2093     * objects.
2094     *
2095     * \todo Improve the granularity of locking.
2096     */
2097    /*@{*/
2098    _glthread_Mutex TexMutex;               /**< texobj thread safety */
2099    GLuint TextureStateStamp;               /**< state notification for shared tex  */
2100    /*@}*/
2101
2102
2103
2104    /**
2105     * \name Vertex/fragment programs
2106     */
2107    /*@{*/
2108    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2109 #if FEATURE_ARB_vertex_program
2110    struct gl_program *DefaultVertexProgram;
2111 #endif
2112 #if FEATURE_ARB_fragment_program
2113    struct gl_program *DefaultFragmentProgram;
2114 #endif
2115    /*@}*/
2116
2117 #if FEATURE_ATI_fragment_shader
2118    struct _mesa_HashTable *ATIShaders;
2119    struct ati_fragment_shader *DefaultFragmentShader;
2120 #endif
2121
2122 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2123    struct _mesa_HashTable *BufferObjects;
2124 #endif
2125
2126 #if FEATURE_ARB_shader_objects
2127    struct _mesa_HashTable *GL2Objects;
2128 #endif
2129
2130 #if FEATURE_EXT_framebuffer_object
2131    struct _mesa_HashTable *RenderBuffers;
2132    struct _mesa_HashTable *FrameBuffers;
2133 #endif
2134
2135    /** Objects associated with the GL_APPLE_vertex_array_object extension. */
2136    struct _mesa_HashTable *ArrayObjects;
2137
2138    void *DriverData;  /**< Device driver shared state */
2139 };
2140
2141
2142
2143
2144 /**
2145  * A renderbuffer stores colors or depth values or stencil values.
2146  * A framebuffer object will have a collection of these.
2147  * Data are read/written to the buffer with a handful of Get/Put functions.
2148  *
2149  * Instances of this object are allocated with the Driver's NewRenderbuffer
2150  * hook.  Drivers will likely wrap this class inside a driver-specific
2151  * class to simulate inheritance.
2152  */
2153 struct gl_renderbuffer
2154 {
2155    _glthread_Mutex Mutex;                  /**< for thread safety */
2156    GLuint ClassID;        /**< Useful for drivers */
2157    GLuint Name;
2158    GLint RefCount;
2159    GLuint Width, Height;
2160    GLenum InternalFormat; /**< The user-specified format */
2161    GLenum _ActualFormat;  /**< The driver-chosen format */
2162    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2163                                GL_STENCIL_INDEX. */
2164    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2165    GLubyte RedBits;      /**< Bits of red per pixel */
2166    GLubyte GreenBits;
2167    GLubyte BlueBits;
2168    GLubyte AlphaBits;
2169    GLubyte IndexBits;
2170    GLubyte DepthBits;
2171    GLubyte StencilBits;
2172    GLvoid *Data;        /**< This may not be used by some kinds of RBs */
2173
2174    /* Used to wrap one renderbuffer around another: */
2175    struct gl_renderbuffer *Wrapped;
2176
2177    /* Delete this renderbuffer */
2178    void (*Delete)(struct gl_renderbuffer *rb);
2179
2180    /* Allocate new storage for this renderbuffer */
2181    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2182                              GLenum internalFormat,
2183                              GLuint width, GLuint height);
2184
2185    /* Lock/Unlock are called before/after calling the Get/Put functions.
2186     * Not sure this is the right place for these yet.
2187    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2188    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2189     */
2190
2191    /* Return a pointer to the element/pixel at (x,y).
2192     * Should return NULL if the buffer memory can't be directly addressed.
2193     */
2194    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2195                        GLint x, GLint y);
2196
2197    /* Get/Read a row of values.
2198     * The values will be of format _BaseFormat and type DataType.
2199     */
2200    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2201                   GLint x, GLint y, void *values);
2202
2203    /* Get/Read values at arbitrary locations.
2204     * The values will be of format _BaseFormat and type DataType.
2205     */
2206    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2207                      const GLint x[], const GLint y[], void *values);
2208
2209    /* Put/Write a row of values.
2210     * The values will be of format _BaseFormat and type DataType.
2211     */
2212    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2213                   GLint x, GLint y, const void *values, const GLubyte *mask);
2214
2215    /* Put/Write a row of RGB values.  This is a special-case routine that's
2216     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2217     * a common case for glDrawPixels and some triangle routines.
2218     * The values will be of format GL_RGB and type DataType.
2219     */
2220    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2221                     GLint x, GLint y, const void *values, const GLubyte *mask);
2222
2223
2224    /* Put/Write a row of identical values.
2225     * The values will be of format _BaseFormat and type DataType.
2226     */
2227    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2228                      GLint x, GLint y, const void *value, const GLubyte *mask);
2229
2230    /* Put/Write values at arbitrary locations.
2231     * The values will be of format _BaseFormat and type DataType.
2232     */
2233    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2234                      const GLint x[], const GLint y[], const void *values,
2235                      const GLubyte *mask);
2236    /* Put/Write identical values at arbitrary locations.
2237     * The values will be of format _BaseFormat and type DataType.
2238     */
2239    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2240                          GLuint count, const GLint x[], const GLint y[],
2241                          const void *value, const GLubyte *mask);
2242 };
2243
2244
2245 /**
2246  * A renderbuffer attachment point points to either a texture object
2247  * (and specifies a mipmap level, cube face or 3D texture slice) or
2248  * points to a renderbuffer.
2249  */
2250 struct gl_renderbuffer_attachment
2251 {
2252    GLenum Type;  /* GL_NONE or GL_TEXTURE or GL_RENDERBUFFER_EXT */
2253    GLboolean Complete;
2254
2255    /* IF Type == GL_RENDERBUFFER_EXT: */
2256    struct gl_renderbuffer *Renderbuffer;
2257
2258    /* IF Type == GL_TEXTURE: */
2259    struct gl_texture_object *Texture;
2260    GLuint TextureLevel;
2261    GLuint CubeMapFace;  /* 0 .. 5, for cube map textures */
2262    GLuint Zoffset;      /* for 3D textures */
2263 };
2264
2265
2266 /**
2267  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2268  * In C++ terms, think of this as a base class from which device drivers
2269  * will make derived classes.
2270  */
2271 struct gl_framebuffer
2272 {
2273    _glthread_Mutex Mutex;                  /**< for thread safety */
2274    GLuint Name;      /* if zero, this is a window system framebuffer */
2275    GLint RefCount;
2276    GLboolean DeletePending;
2277
2278    GLvisual Visual;     /**< The framebuffer's visual.
2279                              Immutable if this is a window system buffer.
2280                              Computed from attachments if user-made FBO. */
2281
2282    GLboolean Initialized;
2283
2284    GLuint Width, Height;        /**< size of frame buffer in pixels */
2285
2286    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2287    /*@{*/
2288    GLint _Xmin, _Xmax;  /**< inclusive */
2289    GLint _Ymin, _Ymax;  /**< exclusive */
2290    /*@}*/
2291
2292    /** \name  Derived Z buffer stuff */
2293    /*@{*/
2294    GLuint _DepthMax;    /**< Max depth buffer value */
2295    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2296    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2297    /*@}*/
2298
2299    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2300
2301    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2302    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2303
2304    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2305     * attribute group and GL_PIXEL attribute group, respectively.
2306     */
2307    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2308    GLenum ColorReadBuffer;
2309
2310    /* These are computed from ColorDrawBuffer and ColorReadBuffer */
2311    GLbitfield _ColorDrawBufferMask[MAX_DRAW_BUFFERS]; /* Mask of BUFFER_BIT_* flags */
2312    GLint _ColorReadBufferIndex; /* -1 = None */
2313
2314    /* These are computed from _ColorDrawBufferMask and _ColorReadBufferIndex */
2315    GLuint _NumColorDrawBuffers[MAX_DRAW_BUFFERS];
2316    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS][4];
2317    struct gl_renderbuffer *_ColorReadBuffer;
2318
2319    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2320     * depth/stencil buffers attached above. */
2321    struct gl_renderbuffer *_DepthBuffer;
2322    struct gl_renderbuffer *_StencilBuffer;
2323
2324    /** Delete this framebuffer */
2325    void (*Delete)(struct gl_framebuffer *fb);
2326 };
2327
2328
2329 /**
2330  * Limits for vertex and fragment programs.
2331  */
2332 struct gl_program_constants
2333 {
2334    /* logical limits */
2335    GLuint MaxInstructions;
2336    GLuint MaxAluInstructions; /* fragment programs only, for now */
2337    GLuint MaxTexInstructions; /* fragment programs only, for now */
2338    GLuint MaxTexIndirections; /* fragment programs only, for now */
2339    GLuint MaxAttribs;
2340    GLuint MaxTemps;
2341    GLuint MaxAddressRegs; /* vertex program only, for now */
2342    GLuint MaxParameters;
2343    GLuint MaxLocalParams;
2344    GLuint MaxEnvParams;
2345    /* native/hardware limits */
2346    GLuint MaxNativeInstructions;
2347    GLuint MaxNativeAluInstructions; /* fragment programs only, for now */
2348    GLuint MaxNativeTexInstructions; /* fragment programs only, for now */
2349    GLuint MaxNativeTexIndirections; /* fragment programs only, for now */
2350    GLuint MaxNativeAttribs;
2351    GLuint MaxNativeTemps;
2352    GLuint MaxNativeAddressRegs; /* vertex program only, for now */
2353    GLuint MaxNativeParameters;
2354    /* For shaders */
2355    GLuint MaxUniformComponents;
2356 };
2357
2358
2359 /**
2360  * Constants which may be overridden by device driver during context creation
2361  * but are never changed after that.
2362  */
2363 struct gl_constants
2364 {
2365    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2366    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2367    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2368    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2369    GLuint MaxTextureCoordUnits;
2370    GLuint MaxTextureImageUnits;
2371    GLuint MaxTextureUnits;              /* = MIN(CoordUnits, ImageUnits) */
2372    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2373    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2374    GLuint MaxArrayLockSize;
2375    GLint SubPixelBits;
2376    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2377    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2378    GLfloat PointSizeGranularity;
2379    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2380    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2381    GLfloat LineWidthGranularity;
2382    GLuint MaxColorTableSize;
2383    GLuint MaxConvolutionWidth;
2384    GLuint MaxConvolutionHeight;
2385    GLuint MaxClipPlanes;
2386    GLuint MaxLights;
2387    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2388    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2389    GLuint MaxViewportWidth, MaxViewportHeight;
2390    struct gl_program_constants VertexProgram;    /* GL_ARB_vertex_program */
2391    struct gl_program_constants FragmentProgram;  /* GL_ARB_fragment_program */
2392    /* shared by vertex and fragment program: */
2393    GLuint MaxProgramMatrices;
2394    GLuint MaxProgramMatrixStackDepth;
2395    /* vertex array / buffer object bounds checking */
2396    GLboolean CheckArrayBounds;
2397    /* GL_ARB_draw_buffers */
2398    GLuint MaxDrawBuffers;
2399    /* GL_OES_read_format */
2400    GLenum ColorReadFormat;
2401    GLenum ColorReadType;
2402    /* GL_EXT_framebuffer_object */
2403    GLuint MaxColorAttachments;
2404    GLuint MaxRenderbufferSize;
2405    /* GL_ARB_vertex_shader */
2406    GLuint MaxVertexTextureImageUnits;
2407    GLuint MaxVaryingFloats;
2408 };
2409
2410
2411 /**
2412  * Enable flag for each OpenGL extension.  Different device drivers will
2413  * enable different extensions at runtime.
2414  */
2415 struct gl_extensions
2416 {
2417    /**
2418     * \name Flags to quickly test if certain extensions are available.
2419     *
2420     * Not every extension needs to have such a flag, but it's encouraged.
2421     */
2422    /*@{*/
2423    GLboolean dummy;  /* don't remove this! */
2424    GLboolean ARB_depth_texture;
2425    GLboolean ARB_draw_buffers;
2426    GLboolean ARB_fragment_program;
2427    GLboolean ARB_fragment_shader;
2428    GLboolean ARB_half_float_pixel;
2429    GLboolean ARB_imaging;
2430    GLboolean ARB_multisample;
2431    GLboolean ARB_multitexture;
2432    GLboolean ARB_occlusion_query;
2433    GLboolean ARB_point_sprite;
2434    GLboolean ARB_shader_objects;
2435    GLboolean ARB_shading_language_100;
2436    GLboolean ARB_shading_language_120;
2437    GLboolean ARB_shadow;
2438    GLboolean ARB_texture_border_clamp;
2439    GLboolean ARB_texture_compression;
2440    GLboolean ARB_texture_cube_map;
2441    GLboolean ARB_texture_env_combine;
2442    GLboolean ARB_texture_env_crossbar;
2443    GLboolean ARB_texture_env_dot3;
2444    GLboolean ARB_texture_float;
2445    GLboolean ARB_texture_mirrored_repeat;
2446    GLboolean ARB_texture_non_power_of_two;
2447    GLboolean ARB_transpose_matrix;
2448    GLboolean ARB_vertex_buffer_object;
2449    GLboolean ARB_vertex_program;
2450    GLboolean ARB_vertex_shader;
2451    GLboolean ARB_window_pos;
2452    GLboolean EXT_abgr;
2453    GLboolean EXT_bgra;
2454    GLboolean EXT_blend_color;
2455    GLboolean EXT_blend_equation_separate;
2456    GLboolean EXT_blend_func_separate;
2457    GLboolean EXT_blend_logic_op;
2458    GLboolean EXT_blend_minmax;
2459    GLboolean EXT_blend_subtract;
2460    GLboolean EXT_clip_volume_hint;
2461    GLboolean EXT_cull_vertex;
2462    GLboolean EXT_convolution;
2463    GLboolean EXT_compiled_vertex_array;
2464    GLboolean EXT_copy_texture;
2465    GLboolean EXT_depth_bounds_test;
2466    GLboolean EXT_draw_range_elements;
2467    GLboolean EXT_framebuffer_object;
2468    GLboolean EXT_fog_coord;
2469    GLboolean EXT_framebuffer_blit;
2470    GLboolean EXT_gpu_program_parameters;
2471    GLboolean EXT_histogram;
2472    GLboolean EXT_multi_draw_arrays;
2473    GLboolean EXT_paletted_texture;
2474    GLboolean EXT_packed_depth_stencil;
2475    GLboolean EXT_packed_pixels;
2476    GLboolean EXT_pixel_buffer_object;
2477    GLboolean EXT_point_parameters;
2478    GLboolean EXT_polygon_offset;
2479    GLboolean EXT_rescale_normal;
2480    GLboolean EXT_shadow_funcs;
2481    GLboolean EXT_secondary_color;
2482    GLboolean EXT_separate_specular_color;
2483    GLboolean EXT_shared_texture_palette;
2484    GLboolean EXT_stencil_wrap;
2485    GLboolean EXT_stencil_two_side;
2486    GLboolean EXT_subtexture;
2487    GLboolean EXT_texture;
2488    GLboolean EXT_texture_object;
2489    GLboolean EXT_texture3D;
2490    GLboolean EXT_texture_compression_s3tc;
2491    GLboolean EXT_texture_env_add;
2492    GLboolean EXT_texture_env_combine;
2493    GLboolean EXT_texture_env_dot3;
2494    GLboolean EXT_texture_filter_anisotropic;
2495    GLboolean EXT_texture_lod_bias;
2496    GLboolean EXT_texture_mirror_clamp;
2497    GLboolean EXT_texture_sRGB;
2498    GLboolean EXT_timer_query;
2499    GLboolean EXT_vertex_array;
2500    GLboolean EXT_vertex_array_set;
2501    /* vendor extensions */
2502    GLboolean APPLE_client_storage;
2503    GLboolean APPLE_packed_pixels;
2504    GLboolean APPLE_vertex_array_object;
2505    GLboolean ATI_texture_mirror_once;
2506    GLboolean ATI_texture_env_combine3;
2507    GLboolean ATI_fragment_shader;
2508    GLboolean ATI_separate_stencil;
2509    GLboolean IBM_rasterpos_clip;
2510    GLboolean IBM_multimode_draw_arrays;
2511    GLboolean MESA_pack_invert;
2512    GLboolean MESA_packed_depth_stencil;
2513    GLboolean MESA_program_debug;
2514    GLboolean MESA_resize_buffers;
2515    GLboolean MESA_ycbcr_texture;
2516    GLboolean NV_blend_square;
2517    GLboolean NV_fragment_program;
2518    GLboolean NV_light_max_exponent;
2519    GLboolean NV_point_sprite;
2520    GLboolean NV_texgen_reflection;
2521    GLboolean NV_texture_rectangle;
2522    GLboolean NV_vertex_program;
2523    GLboolean NV_vertex_program1_1;
2524    GLboolean OES_read_format;
2525    GLboolean SGI_color_matrix;
2526    GLboolean SGI_color_table;
2527    GLboolean SGI_texture_color_table;
2528    GLboolean SGIS_generate_mipmap;
2529    GLboolean SGIS_texture_edge_clamp;
2530    GLboolean SGIS_texture_lod;
2531    GLboolean SGIX_depth_texture;
2532    GLboolean SGIX_shadow;
2533    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2534    GLboolean TDFX_texture_compression_FXT1;
2535    GLboolean S3_s3tc;
2536    /*@}*/
2537    /* The extension string */
2538    const GLubyte *String;
2539 };
2540
2541
2542 /**
2543  * A stack of matrices (projection, modelview, color, texture, etc).
2544  */
2545 struct matrix_stack
2546 {
2547    GLmatrix *Top;      /**< points into Stack */
2548    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2549    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2550    GLuint MaxDepth;    /**< size of Stack[] array */
2551    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2552 };
2553
2554
2555 /**
2556  * \name Bits for image transfer operations
2557  *
2558  * \sa __GLcontextRec::ImageTransferState.
2559  */
2560 /*@{*/
2561 #define IMAGE_SCALE_BIAS_BIT                      0x1
2562 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2563 #define IMAGE_MAP_COLOR_BIT                       0x4
2564 #define IMAGE_COLOR_TABLE_BIT                     0x8
2565 #define IMAGE_CONVOLUTION_BIT                     0x10
2566 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2567 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2568 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2569 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2570 #define IMAGE_HISTOGRAM_BIT                       0x200
2571 #define IMAGE_MIN_MAX_BIT                         0x400
2572 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2573 #define IMAGE_RED_TO_LUMINANCE                    0x1000
2574
2575
2576 /** Pixel Transfer ops up to convolution */
2577 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2578                                     IMAGE_SHIFT_OFFSET_BIT |   \
2579                                     IMAGE_MAP_COLOR_BIT |      \
2580                                     IMAGE_COLOR_TABLE_BIT)
2581
2582 /** Pixel transfer ops after convolution */
2583 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2584                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2585                                      IMAGE_COLOR_MATRIX_BIT |                 \
2586                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2587                                      IMAGE_HISTOGRAM_BIT |                    \
2588                                      IMAGE_MIN_MAX_BIT)
2589 /*@}*/
2590
2591
2592 /**
2593  * \name Bits to indicate what state has changed.
2594  *
2595  * 4 unused flags.
2596  */
2597 /*@{*/
2598 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2599 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2600 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2601 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2602 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2603 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2604 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2605 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2606 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2607 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2608 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2609 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2610 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2611 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2612 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2613 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2614 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2615 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2616 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2617 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2618 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2619 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2620 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2621 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2622 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2623 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2624 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2625 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2626 #define _NEW_ALL ~0
2627 /*@}*/
2628
2629
2630 /**
2631  * \name Bits to track array state changes
2632  *
2633  * Also used to summarize array enabled.
2634  */
2635 /*@{*/
2636 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2637 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2638 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2639 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2640 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2641 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2642 #define _NEW_ARRAY_INDEX            VERT_BIT_COLOR_INDEX
2643 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_EDGEFLAG
2644 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2645 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2646 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2647 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2648 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2649 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2650 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2651 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2652 #define _NEW_ARRAY_ATTRIB_0         VERT_BIT_GENERIC0  /* start at bit 16 */
2653 #define _NEW_ARRAY_ALL              0xffffffff
2654
2655
2656 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2657 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2658 /*@}*/
2659
2660
2661 /**
2662  * \name A bunch of flags that we think might be useful to drivers.
2663  *
2664  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2665  */
2666 /*@{*/
2667 #define DD_FLATSHADE                0x1
2668 #define DD_SEPARATE_SPECULAR        0x2
2669 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2670 #define DD_TRI_LIGHT_TWOSIDE        0x8
2671 #define DD_TRI_UNFILLED             0x10
2672 #define DD_TRI_SMOOTH               0x20
2673 #define DD_TRI_STIPPLE              0x40
2674 #define DD_TRI_OFFSET               0x80
2675 #define DD_LINE_SMOOTH              0x100
2676 #define DD_LINE_STIPPLE             0x200
2677 #define DD_LINE_WIDTH               0x400
2678 #define DD_POINT_SMOOTH             0x800
2679 #define DD_POINT_SIZE               0x1000
2680 #define DD_POINT_ATTEN              0x2000
2681 #define DD_TRI_TWOSTENCIL           0x4000
2682 /*@}*/
2683
2684
2685 /**
2686  * \name Define the state changes under which each of these bits might change
2687  */
2688 /*@{*/
2689 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2690 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2691 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2692 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2693 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2694 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2695 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2696 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2697 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2698 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2699 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2700 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2701 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2702 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2703 /*@}*/
2704
2705
2706 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2707                                            _NEW_TEXTURE |       \
2708                                            _NEW_POINT |         \
2709                                            _NEW_PROGRAM |       \
2710                                            _NEW_MODELVIEW)
2711
2712 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2713                                            _NEW_TEXTURE)
2714
2715 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2716
2717
2718
2719
2720 /*
2721  * Forward declaration of display list data types:
2722  */
2723 union node;
2724 typedef union node Node;
2725
2726
2727 /* This has to be included here. */
2728 #include "dd.h"
2729
2730
2731 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2732
2733 /**
2734  * Core Mesa's support for tnl modules:
2735  */
2736 struct gl_tnl_module
2737 {
2738    /**
2739     * Vertex format to be lazily swapped into current dispatch.
2740     */
2741    const GLvertexformat *Current;
2742
2743    /**
2744     * \name Record of functions swapped out.
2745     * On restore, only need to swap these functions back in.
2746     */
2747    /*@{*/
2748    struct {
2749        _glapi_proc * location;
2750        _glapi_proc function;
2751    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2752    GLuint SwapCount;
2753    /*@}*/
2754 };
2755
2756 /* Strictly this is a tnl/ private concept, but it doesn't seem
2757  * worthwhile adding a tnl private structure just to hold this one bit
2758  * of information:
2759  */
2760 #define MESA_DLIST_DANGLING_REFS     0x1
2761
2762 /* Provide a location where information about a display list can be
2763  * collected.  Could be extended with driverPrivate structures,
2764  * etc. in the future.
2765  */
2766 struct mesa_display_list
2767 {
2768    Node *node;
2769    GLuint id;
2770    GLbitfield flags;
2771 };
2772
2773
2774 /**
2775  * State used during display list compilation and execution.
2776  */
2777 struct mesa_list_state
2778 {
2779    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2780    GLuint CallDepth;            /**< Current recursion calling depth */
2781
2782    struct mesa_display_list *CurrentList;
2783    Node *CurrentListPtr;        /**< Head of list being compiled */
2784    GLuint CurrentListNum;       /**< Number of the list being compiled */
2785    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2786    GLuint CurrentPos;           /**< Index into current block of nodes */
2787
2788    GLvertexformat ListVtxfmt;
2789
2790    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2791    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2792
2793    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2794    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2795
2796    GLubyte ActiveIndex;
2797    GLfloat CurrentIndex;
2798
2799    GLubyte ActiveEdgeFlag;
2800    GLboolean CurrentEdgeFlag;
2801 };
2802
2803
2804 /**
2805  * Mesa rendering context.
2806  *
2807  * This is the central context data structure for Mesa.  Almost all
2808  * OpenGL state is contained in this structure.
2809  * Think of this as a base class from which device drivers will derive
2810  * sub classes.
2811  *
2812  * The GLcontext typedef names this structure.
2813  */
2814 struct __GLcontextRec
2815 {
2816    /**
2817     * \name OS related interfaces.
2818     *
2819     * These \b must be the first members of this structure, because they are
2820     * exposed to the outside world (i.e. GLX extension).
2821     */
2822    /*@{*/
2823    __GLimports imports;
2824    __GLexports exports;
2825    /*@}*/
2826
2827    /** State possibly shared with other contexts in the address space */
2828    struct gl_shared_state *Shared;
2829
2830    /** \name API function pointer tables */
2831    /*@{*/
2832    struct _glapi_table *Save;   /**< Display list save functions */
2833    struct _glapi_table *Exec;   /**< Execute functions */
2834    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2835    /*@}*/
2836
2837    GLvisual Visual;
2838    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2839    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2840    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2841    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2842
2843    /**
2844     * Device driver function pointer table
2845     */
2846    struct dd_function_table Driver;
2847
2848    void *DriverCtx;     /**< Points to device driver context/state */
2849    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2850
2851    /** Core/Driver constants */
2852    struct gl_constants Const;
2853
2854    /** \name The various 4x4 matrix stacks */
2855    /*@{*/
2856    struct matrix_stack ModelviewMatrixStack;
2857    struct matrix_stack ProjectionMatrixStack;
2858    struct matrix_stack ColorMatrixStack;
2859    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2860    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2861    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2862    /*@}*/
2863
2864    /** Combined modelview and projection matrix */
2865    GLmatrix _ModelProjectMatrix;
2866
2867    /** \name Display lists */
2868    struct mesa_list_state ListState;
2869
2870    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2871    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2872
2873    /** Extension information */
2874    struct gl_extensions Extensions;
2875
2876    /** \name State attribute stack (for glPush/PopAttrib) */
2877    /*@{*/
2878    GLuint AttribStackDepth;
2879    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2880    /*@}*/
2881
2882    /** \name Renderer attribute groups
2883     *
2884     * We define a struct for each attribute group to make pushing and popping
2885     * attributes easy.  Also it's a good organization.
2886     */
2887    /*@{*/
2888    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
2889    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
2890    struct gl_current_attrib     Current;        /**< Current attributes */
2891    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2892    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2893    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2894    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2895    struct gl_light_attrib       Light;          /**< Light attributes */
2896    struct gl_line_attrib        Line;           /**< Line attributes */
2897    struct gl_list_attrib        List;           /**< List attributes */
2898    struct gl_multisample_attrib Multisample;
2899    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2900    struct gl_point_attrib       Point;          /**< Point attributes */
2901    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2902    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2903    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2904    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2905    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2906    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2907    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2908    /*@}*/
2909
2910    /** \name Client attribute stack */
2911    /*@{*/
2912    GLuint ClientAttribStackDepth;
2913    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2914    /*@}*/
2915
2916    /** \name Client attribute groups */
2917    /*@{*/
2918    struct gl_array_attrib       Array;  /**< Vertex arrays */
2919    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2920    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2921    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2922    /*@}*/
2923
2924    /** \name Other assorted state (not pushed/popped on attribute stack) */
2925    /*@{*/
2926    struct gl_pixelmaps          PixelMaps;
2927    struct gl_histogram_attrib   Histogram;
2928    struct gl_minmax_attrib      MinMax;
2929    struct gl_convolution_attrib Convolution1D;
2930    struct gl_convolution_attrib Convolution2D;
2931    struct gl_convolution_attrib Separable2D;
2932
2933    struct gl_evaluators EvalMap;   /**< All evaluators */
2934    struct gl_feedback   Feedback;  /**< Feedback */
2935    struct gl_selection  Select;    /**< Selection */
2936
2937    struct gl_color_table ColorTable;       /**< Pre-convolution */
2938    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2939    struct gl_color_table PostConvolutionColorTable;
2940    struct gl_color_table ProxyPostConvolutionColorTable;
2941    struct gl_color_table PostColorMatrixColorTable;
2942    struct gl_color_table ProxyPostColorMatrixColorTable;
2943
2944    struct gl_program_state Program;        /**< for vertex or fragment progs */
2945    struct gl_vertex_program_state VertexProgram;   /**< GL_ARB/NV_vertex_program */
2946    struct gl_fragment_program_state FragmentProgram;  /**< GL_ARB/NV_vertex_program */
2947    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
2948
2949    struct gl_fragment_program *_TexEnvProgram;     /**< Texture state as fragment program */
2950    struct gl_vertex_program *_TnlProgram;          /**< Fixed func TNL state as vertex program */
2951
2952    GLboolean _MaintainTnlProgram;
2953    GLboolean _MaintainTexEnvProgram;
2954    GLboolean _UseTexEnvProgram;
2955
2956    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
2957
2958    struct gl_shader_objects_state ShaderObjects;        /* GL_ARB_shader_objects */
2959    /*@}*/
2960
2961 #if FEATURE_EXT_framebuffer_object
2962    struct gl_renderbuffer *CurrentRenderbuffer;
2963 #endif
2964
2965    GLenum ErrorValue;        /**< Last error code */
2966    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2967    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
2968
2969    /** \name Derived state */
2970    /*@{*/
2971    GLbitfield _TriangleCaps;      /**< bitwise-or of DD_* flags */
2972    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2973    GLfloat _EyeZDir[3];
2974    GLfloat _ModelViewInvScale;
2975    GLboolean _NeedEyeCoords;
2976    GLboolean _ForceEyeCoords;
2977    GLenum _CurrentProgram;    /* currently executing program */
2978
2979    GLuint TextureStateTimestamp; /* detect changes to shared state */
2980
2981    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2982    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2983    /**@}*/
2984
2985    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2986
2987
2988    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2989                     *
2990                     * We don't have a better way to communicate this value from
2991                     * swrast_setup to swrast. */
2992
2993    /** \name For debugging/development only */
2994    /*@{*/
2995    GLboolean FirstTimeCurrent;
2996    /*@}*/
2997
2998    /** Dither disable via MESA_NO_DITHER env var */
2999    GLboolean NoDither;
3000
3001    /** software compression/decompression supported or not */
3002    GLboolean Mesa_DXTn;
3003
3004    /** Core tnl module support */
3005    struct gl_tnl_module TnlModule;
3006
3007    /**
3008     * \name Hooks for module contexts.
3009     *
3010     * These will eventually live in the driver or elsewhere.
3011     */
3012    /*@{*/
3013    void *swrast_context;
3014    void *swsetup_context;
3015    void *swtnl_context;
3016    void *swtnl_im;
3017    void *acache_context;
3018    void *aelt_context;
3019    /*@}*/
3020 };
3021
3022
3023 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
3024 extern const char *_mesa_prim_name[GL_POLYGON+4];
3025
3026
3027 #ifdef DEBUG
3028 extern int MESA_VERBOSE;
3029 extern int MESA_DEBUG_FLAGS;
3030 # define MESA_FUNCTION __FUNCTION__
3031 #else
3032 # define MESA_VERBOSE 0
3033 # define MESA_DEBUG_FLAGS 0
3034 # define MESA_FUNCTION "a function"
3035 # ifndef NDEBUG
3036 #  define NDEBUG
3037 # endif
3038 #endif
3039
3040
3041 enum _verbose
3042 {
3043    VERBOSE_VARRAY               = 0x0001,
3044    VERBOSE_TEXTURE              = 0x0002,
3045    VERBOSE_IMMEDIATE            = 0x0004,
3046    VERBOSE_PIPELINE             = 0x0008,
3047    VERBOSE_DRIVER               = 0x0010,
3048    VERBOSE_STATE                = 0x0020,
3049    VERBOSE_API                  = 0x0040,
3050    VERBOSE_DISPLAY_LIST         = 0x0100,
3051    VERBOSE_LIGHTING             = 0x0200,
3052    VERBOSE_PRIMS                = 0x0400,
3053    VERBOSE_VERTS                = 0x0800,
3054    VERBOSE_DISASSEM             = 0x1000
3055 };
3056
3057
3058 enum _debug
3059 {
3060    DEBUG_ALWAYS_FLUSH           = 0x1
3061 };
3062
3063
3064
3065 #define Elements(x) sizeof(x)/sizeof(*(x))
3066
3067
3068 #endif /* TYPES_H */