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
  45
  46 /**
  47  * Color channel data type.
  48  */
  49 #if CHAN_BITS == 8
  50    typedef GLubyte GLchan;
  51 #define CHAN_MAX 255
  52 #define CHAN_MAXF 255.0F
  53 #define CHAN_TYPE GL_UNSIGNED_BYTE
  54 #elif CHAN_BITS == 16
  55    typedef GLushort GLchan;
  56 #define CHAN_MAX 65535
  57 #define CHAN_MAXF 65535.0F
  58 #define CHAN_TYPE GL_UNSIGNED_SHORT
  59 #elif CHAN_BITS == 32
  60    typedef GLfloat GLchan;
  61 #define CHAN_MAX 1.0
  62 #define CHAN_MAXF 1.0F
  63 #define CHAN_TYPE GL_FLOAT
  64 #else
  65 #error "illegal number of color channel bits"
  66 #endif
  67
  68
  69 /**
  70  * Stencil buffer data type.
  71  */
  72 #if STENCIL_BITS==8
  73    typedef GLubyte GLstencil;
  74 #elif STENCIL_BITS==16
  75    typedef GLushort GLstencil;
  76 #else
  77 #  error "illegal number of stencil bits"
  78 #endif
  79
  80
  81 /**
  82  * Fixed point data type.
  83  */
  84 typedef int GLfixed;
  85 /*
  86  * Fixed point arithmetic macros
  87  */
  88 #ifndef FIXED_FRAC_BITS
  89 #define FIXED_FRAC_BITS 11
  90 #endif
  91
  92 #define FIXED_SHIFT     FIXED_FRAC_BITS
  93 #define FIXED_ONE       (1 << FIXED_SHIFT)
  94 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
  95 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
  96 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
  97 #define FIXED_EPSILON   1
  98 #define FIXED_SCALE     ((float) FIXED_ONE)
  99 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 100 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 101 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 102 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 103 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 104 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 105 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 106 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 107 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 108 #define PosFloatToFixed(X)      FloatToFixed(X)
 109 #define SignedFloatToFixed(X)   FloatToFixed(X)
 110
 111
 112
 113 /**
 114  * \name Some forward type declarations
 115  */
 116 /*@{*/
 117 struct _mesa_HashTable;
 118 struct gl_pixelstore_attrib;
 119 struct gl_texture_format;
 120 struct gl_texture_image;
 121 struct gl_texture_object;
 122 typedef struct __GLcontextRec GLcontext;
 123 typedef struct __GLcontextModesRec GLvisual;
 124 typedef struct gl_framebuffer GLframebuffer;
 125 /*@}*/
 126
 127
 128
 129 /**
 130  * Indexes for vertex program attributes.
 131  * GL_NV_vertex_program aliases generic attributes over the conventional
 132  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 133  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 134  * generic attributes are distinct/separate).
 135  */
 136 enum
 137 {
 138    VERT_ATTRIB_POS = 0,
 139    VERT_ATTRIB_WEIGHT = 1,
 140    VERT_ATTRIB_NORMAL = 2,
 141    VERT_ATTRIB_COLOR0 = 3,
 142    VERT_ATTRIB_COLOR1 = 4,
 143    VERT_ATTRIB_FOG = 5,
 144    VERT_ATTRIB_SIX = 6,
 145    VERT_ATTRIB_SEVEN = 7,
 146    VERT_ATTRIB_TEX0 = 8,
 147    VERT_ATTRIB_TEX1 = 9,
 148    VERT_ATTRIB_TEX2 = 10,
 149    VERT_ATTRIB_TEX3 = 11,
 150    VERT_ATTRIB_TEX4 = 12,
 151    VERT_ATTRIB_TEX5 = 13,
 152    VERT_ATTRIB_TEX6 = 14,
 153    VERT_ATTRIB_TEX7 = 15,
 154    VERT_ATTRIB_GENERIC0 = 16,
 155    VERT_ATTRIB_GENERIC1 = 17,
 156    VERT_ATTRIB_GENERIC2 = 18,
 157    VERT_ATTRIB_GENERIC3 = 19,
 158    VERT_ATTRIB_MAX = 16  /* XXX not counting generic attribs yet */
 159 };
 160
 161 /**
 162  * Bitflags for vertex attributes.
 163  * These are used in bitfields in many places.
 164  */
 165 /*@{*/
 166 #define VERT_BIT_POS      (1 << VERT_ATTRIB_POS)
 167 #define VERT_BIT_WEIGHT   (1 << VERT_ATTRIB_WEIGHT)
 168 #define VERT_BIT_NORMAL   (1 << VERT_ATTRIB_NORMAL)
 169 #define VERT_BIT_COLOR0   (1 << VERT_ATTRIB_COLOR0)
 170 #define VERT_BIT_COLOR1   (1 << VERT_ATTRIB_COLOR1)
 171 #define VERT_BIT_FOG      (1 << VERT_ATTRIB_FOG)
 172 #define VERT_BIT_SIX      (1 << VERT_ATTRIB_SIX)
 173 #define VERT_BIT_SEVEN    (1 << VERT_ATTRIB_SEVEN)
 174 #define VERT_BIT_TEX0     (1 << VERT_ATTRIB_TEX0)
 175 #define VERT_BIT_TEX1     (1 << VERT_ATTRIB_TEX1)
 176 #define VERT_BIT_TEX2     (1 << VERT_ATTRIB_TEX2)
 177 #define VERT_BIT_TEX3     (1 << VERT_ATTRIB_TEX3)
 178 #define VERT_BIT_TEX4     (1 << VERT_ATTRIB_TEX4)
 179 #define VERT_BIT_TEX5     (1 << VERT_ATTRIB_TEX5)
 180 #define VERT_BIT_TEX6     (1 << VERT_ATTRIB_TEX6)
 181 #define VERT_BIT_TEX7     (1 << VERT_ATTRIB_TEX7)
 182 #define VERT_BIT_GENERIC0 (1 << VERT_ATTRIB_GENERIC0)
 183 #define VERT_BIT_GENERIC1 (1 << VERT_ATTRIB_GENERIC1)
 184 #define VERT_BIT_GENERIC2 (1 << VERT_ATTRIB_GENERIC2)
 185 #define VERT_BIT_GENERIC3 (1 << VERT_ATTRIB_GENERIC3)
 186
 187 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 188 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 189 /*@}*/
 190
 191 /**
 192  * Indexes for vertex program result attributes
 193  */
 194 /*@{*/
 195 #define VERT_RESULT_HPOS 0
 196 #define VERT_RESULT_COL0 1
 197 #define VERT_RESULT_COL1 2
 198 #define VERT_RESULT_FOGC 3
 199 #define VERT_RESULT_TEX0 4
 200 #define VERT_RESULT_TEX1 5
 201 #define VERT_RESULT_TEX2 6
 202 #define VERT_RESULT_TEX3 7
 203 #define VERT_RESULT_TEX4 8
 204 #define VERT_RESULT_TEX5 9
 205 #define VERT_RESULT_TEX6 10
 206 #define VERT_RESULT_TEX7 11
 207 #define VERT_RESULT_PSIZ 12
 208 #define VERT_RESULT_BFC0 13
 209 #define VERT_RESULT_BFC1 14
 210 #define VERT_RESULT_MAX  15
 211 /*@}*/
 212
 213
 214 /**
 215  * Indexes for fragment program input attributes.
 216  */
 217 enum
 218 {
 219    FRAG_ATTRIB_WPOS = 0,
 220    FRAG_ATTRIB_COL0 = 1,
 221    FRAG_ATTRIB_COL1 = 2,
 222    FRAG_ATTRIB_FOGC = 3,
 223    FRAG_ATTRIB_TEX0 = 4,
 224    FRAG_ATTRIB_TEX1 = 5,
 225    FRAG_ATTRIB_TEX2 = 6,
 226    FRAG_ATTRIB_TEX3 = 7,
 227    FRAG_ATTRIB_TEX4 = 8,
 228    FRAG_ATTRIB_TEX5 = 9,
 229    FRAG_ATTRIB_TEX6 = 10,
 230    FRAG_ATTRIB_TEX7 = 11,
 231    FRAG_ATTRIB_MAX = 12
 232 };
 233
 234 /**
 235  * Bitflags for fragment program input attributes.
 236  */
 237 /*@{*/
 238 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 239 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 240 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 241 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 242 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 243 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 244 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 245 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 246 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 247 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 248 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 249 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 250
 251 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 252                            FRAG_BIT_TEX1|       \
 253                            FRAG_BIT_TEX2|       \
 254                            FRAG_BIT_TEX3|       \
 255                            FRAG_BIT_TEX4|       \
 256                            FRAG_BIT_TEX5|       \
 257                            FRAG_BIT_TEX6|       \
 258                            FRAG_BIT_TEX7)
 259 /*@}*/
 260
 261
 262 /**
 263  * Fragment program results
 264  */
 265 /*@{*/
 266 #define FRAG_RESULT_COLR  0
 267 #define FRAG_RESULT_COLH  1
 268 #define FRAG_RESULT_DEPR  2
 269 #define FRAG_RESULT_MAX   3
 270 /*@}*/
 271
 272
 273 /**
 274  * Indexes for all renderbuffers
 275  */
 276 enum {
 277    BUFFER_FRONT_LEFT  = 0,  /* the four standard color buffers */
 278    BUFFER_BACK_LEFT   = 1,
 279    BUFFER_FRONT_RIGHT = 2,
 280    BUFFER_BACK_RIGHT  = 3,
 281    BUFFER_AUX0        = 4,  /* optional aux buffer */
 282    BUFFER_AUX1        = 5,
 283    BUFFER_AUX2        = 6,
 284    BUFFER_AUX3        = 7,
 285    BUFFER_DEPTH       = 8,
 286    BUFFER_STENCIL     = 9,
 287    BUFFER_ACCUM       = 10,
 288    BUFFER_COLOR0      = 11, /* generic renderbuffers */
 289    BUFFER_COLOR1      = 12,
 290    BUFFER_COLOR2      = 13,
 291    BUFFER_COLOR3      = 14,
 292    BUFFER_COLOR4      = 15,
 293    BUFFER_COLOR5      = 16,
 294    BUFFER_COLOR6      = 17,
 295    BUFFER_COLOR7      = 18,
 296    BUFFER_COUNT       = 19
 297 };
 298
 299 /**
 300  * Bit flags for all renderbuffers
 301  */
 302 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 303 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 304 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 305 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 306 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 307 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 308 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 309 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 310 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 311 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 312 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 313 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 314 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 315 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 316 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 317 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 318 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 319 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 320 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 321
 322 /**
 323  * Mask of all the color buffer bits (but not accum).
 324  */
 325 #define BUFFER_BITS_COLOR  (BUFFER_BIT_FRONT_LEFT | \
 326                             BUFFER_BIT_BACK_LEFT | \
 327                             BUFFER_BIT_FRONT_RIGHT | \
 328                             BUFFER_BIT_BACK_RIGHT | \
 329                             BUFFER_BIT_AUX0 | \
 330                             BUFFER_BIT_AUX1 | \
 331                             BUFFER_BIT_AUX2 | \
 332                             BUFFER_BIT_AUX3 | \
 333                             BUFFER_BIT_COLOR0 | \
 334                             BUFFER_BIT_COLOR1 | \
 335                             BUFFER_BIT_COLOR2 | \
 336                             BUFFER_BIT_COLOR3 | \
 337                             BUFFER_BIT_COLOR4 | \
 338                             BUFFER_BIT_COLOR5 | \
 339                             BUFFER_BIT_COLOR6 | \
 340                             BUFFER_BIT_COLOR7)
 341
 342
 343
 344
 345 /**
 346  * Data structure for color tables
 347  */
 348 struct gl_color_table
 349 {
 350    GLenum InternalFormat;      /**< The user-specified format */
 351    GLenum _BaseFormat;         /**< GL_ALPHA, GL_RGBA, GL_RGB, etc */
 352    GLuint Size;           /**< number of entries (rows) in table */
 353    GLvoid *Table;         /**< points to data of <Type> */
 354    GLenum Type;           /**< GL_UNSIGNED_BYTE or GL_FLOAT */
 355    GLubyte RedSize;
 356    GLubyte GreenSize;
 357    GLubyte BlueSize;
 358    GLubyte AlphaSize;
 359    GLubyte LuminanceSize;
 360    GLubyte IntensitySize;
 361 };
 362
 363
 364 /**
 365  * \name Bit flags used for updating material values.
 366  */
 367 /*@{*/
 368 #define MAT_ATTRIB_FRONT_AMBIENT           0
 369 #define MAT_ATTRIB_BACK_AMBIENT            1
 370 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 371 #define MAT_ATTRIB_BACK_DIFFUSE            3
 372 #define MAT_ATTRIB_FRONT_SPECULAR          4
 373 #define MAT_ATTRIB_BACK_SPECULAR           5
 374 #define MAT_ATTRIB_FRONT_EMISSION          6
 375 #define MAT_ATTRIB_BACK_EMISSION           7
 376 #define MAT_ATTRIB_FRONT_SHININESS         8
 377 #define MAT_ATTRIB_BACK_SHININESS          9
 378 #define MAT_ATTRIB_FRONT_INDEXES           10
 379 #define MAT_ATTRIB_BACK_INDEXES            11
 380 #define MAT_ATTRIB_MAX                     12
 381
 382 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 383 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 384 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 385 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 386 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 387 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 388
 389 #define MAT_INDEX_AMBIENT  0
 390 #define MAT_INDEX_DIFFUSE  1
 391 #define MAT_INDEX_SPECULAR 2
 392
 393 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 394 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 395 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 396 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 397 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 398 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 399 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 400 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 401 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 402 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 403 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 404 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 405
 406
 407 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 408                                  MAT_BIT_FRONT_AMBIENT |        \
 409                                  MAT_BIT_FRONT_DIFFUSE |        \
 410                                  MAT_BIT_FRONT_SPECULAR |       \
 411                                  MAT_BIT_FRONT_SHININESS |      \
 412                                  MAT_BIT_FRONT_INDEXES)
 413
 414 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 415                                  MAT_BIT_BACK_AMBIENT |         \
 416                                  MAT_BIT_BACK_DIFFUSE |         \
 417                                  MAT_BIT_BACK_SPECULAR |        \
 418                                  MAT_BIT_BACK_SHININESS |       \
 419                                  MAT_BIT_BACK_INDEXES)
 420
 421 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 422 /*@}*/
 423
 424
 425 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 426 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 427
 428 /**
 429  * Material shininess lookup table.
 430  */
 431 struct gl_shine_tab
 432 {
 433    struct gl_shine_tab *next, *prev;
 434    GLfloat tab[SHINE_TABLE_SIZE+1];
 435    GLfloat shininess;
 436    GLuint refcount;
 437 };
 438
 439
 440 /**
 441  * Light source state.
 442  */
 443 struct gl_light
 444 {
 445    struct gl_light *next;       /**< double linked list with sentinel */
 446    struct gl_light *prev;
 447
 448    GLfloat Ambient[4];          /**< ambient color */
 449    GLfloat Diffuse[4];          /**< diffuse color */
 450    GLfloat Specular[4];         /**< specular color */
 451    GLfloat EyePosition[4];      /**< position in eye coordinates */
 452    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 453    GLfloat SpotExponent;
 454    GLfloat SpotCutoff;          /**< in degrees */
 455    GLfloat _CosCutoffNeg;       /**< = cos(SpotCutoff) */
 456    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 457    GLfloat ConstantAttenuation;
 458    GLfloat LinearAttenuation;
 459    GLfloat QuadraticAttenuation;
 460    GLboolean Enabled;           /**< On/off flag */
 461
 462    /**
 463     * \name Derived fields
 464     */
 465    /*@{*/
 466    GLbitfield _Flags;           /**< State */
 467
 468    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 469    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 470    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 471    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 472    GLfloat _VP_inf_spot_attenuation;
 473
 474    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 475    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 476    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 477    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 478    GLfloat _dli;                /**< CI diffuse light intensity */
 479    GLfloat _sli;                /**< CI specular light intensity */
 480    /*@}*/
 481 };
 482
 483
 484 /**
 485  * Light model state.
 486  */
 487 struct gl_lightmodel
 488 {
 489    GLfloat Ambient[4];          /**< ambient color */
 490    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 491    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 492    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 493                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 494 };
 495
 496
 497 /**
 498  * Material state.
 499  */
 500 struct gl_material
 501 {
 502    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 503 };
 504
 505
 506 /**
 507  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 508  */
 509 struct gl_accum_attrib
 510 {
 511    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 512 };
 513
 514
 515 /**
 516  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 517  */
 518 struct gl_colorbuffer_attrib
 519 {
 520    GLuint ClearIndex;                   /**< Index to use for glClear */
 521    GLclampf ClearColor[4];              /**< Color to use for glClear */
 522
 523    GLuint IndexMask;                    /**< Color index write mask */
 524    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 525
 526    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 527
 528    /**
 529     * \name alpha testing
 530     */
 531    /*@{*/
 532    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 533    GLenum AlphaFunc;                    /**< Alpha test function */
 534    GLclampf AlphaRef;                   /**< Alpha reference value */
 535    /*@}*/
 536
 537    /**
 538     * \name Blending
 539     */
 540    /*@{*/
 541    GLboolean BlendEnabled;              /**< Blending enabled flag */
 542    GLenum BlendSrcRGB;                  /**< Blending source operator */
 543    GLenum BlendDstRGB;                  /**< Blending destination operator */
 544    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 545    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 546    GLenum BlendEquationRGB;             /**< Blending equation */
 547    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 548    GLfloat BlendColor[4];               /**< Blending color */
 549    /*@}*/
 550
 551    /**
 552     * \name Logic op
 553     */
 554    /*@{*/
 555    GLenum LogicOp;                      /**< Logic operator */
 556    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 557    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 558    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 559    /*@}*/
 560
 561    GLboolean DitherFlag;                /**< Dither enable flag */
 562
 563    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 564    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 565 };
 566
 567
 568 /**
 569  * Current attribute group (GL_CURRENT_BIT).
 570  */
 571 struct gl_current_attrib
 572 {
 573    /**
 574     * \name Values valid only when FLUSH_VERTICES has been called.
 575     */
 576    /*@{*/
 577    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 578                                                   *  indexed by VERT_ATTRIB_* */
 579    GLfloat Index;                               /**< Current color index */
 580    GLboolean EdgeFlag;                          /**< Current edge flag */
 581    /*@}*/
 582
 583    /**
 584     * \name Values are always valid.
 585     *
 586     * \note BTW, note how similar this set of attributes is to the SWvertex
 587     * data type in the software rasterizer...
 588     */
 589    /*@{*/
 590    GLfloat RasterPos[4];                        /**< Current raster position */
 591    GLfloat RasterDistance;                      /**< Current raster distance */
 592    GLfloat RasterColor[4];                      /**< Current raster color */
 593    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 594    GLfloat RasterIndex;                         /**< Current raster index */
 595    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 596    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 597    /*@}*/
 598 };
 599
 600
 601 /**
 602  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 603  */
 604 struct gl_depthbuffer_attrib
 605 {
 606    GLenum Func;                 /**< Function for depth buffer compare */
 607    GLclampd Clear;              /**< Value to clear depth buffer to */
 608    GLboolean Test;              /**< Depth buffering enabled flag */
 609    GLboolean Mask;              /**< Depth buffer writable? */
 610    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 611    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 612 };
 613
 614
 615 /**
 616  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
 617  */
 618 struct gl_enable_attrib
 619 {
 620    GLboolean AlphaTest;
 621    GLboolean AutoNormal;
 622    GLboolean Blend;
 623    GLbitfield ClipPlanes;
 624    GLboolean ColorMaterial;
 625    GLboolean ColorTable;                /* SGI_color_table */
 626    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 627    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 628    GLboolean Convolution1D;
 629    GLboolean Convolution2D;
 630    GLboolean Separable2D;
 631    GLboolean CullFace;
 632    GLboolean DepthTest;
 633    GLboolean Dither;
 634    GLboolean Fog;
 635    GLboolean Histogram;
 636    GLboolean Light[MAX_LIGHTS];
 637    GLboolean Lighting;
 638    GLboolean LineSmooth;
 639    GLboolean LineStipple;
 640    GLboolean IndexLogicOp;
 641    GLboolean ColorLogicOp;
 642    GLboolean Map1Color4;
 643    GLboolean Map1Index;
 644    GLboolean Map1Normal;
 645    GLboolean Map1TextureCoord1;
 646    GLboolean Map1TextureCoord2;
 647    GLboolean Map1TextureCoord3;
 648    GLboolean Map1TextureCoord4;
 649    GLboolean Map1Vertex3;
 650    GLboolean Map1Vertex4;
 651    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 652    GLboolean Map2Color4;
 653    GLboolean Map2Index;
 654    GLboolean Map2Normal;
 655    GLboolean Map2TextureCoord1;
 656    GLboolean Map2TextureCoord2;
 657    GLboolean Map2TextureCoord3;
 658    GLboolean Map2TextureCoord4;
 659    GLboolean Map2Vertex3;
 660    GLboolean Map2Vertex4;
 661    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 662    GLboolean MinMax;
 663    GLboolean Normalize;
 664    GLboolean PixelTexture;
 665    GLboolean PointSmooth;
 666    GLboolean PolygonOffsetPoint;
 667    GLboolean PolygonOffsetLine;
 668    GLboolean PolygonOffsetFill;
 669    GLboolean PolygonSmooth;
 670    GLboolean PolygonStipple;
 671    GLboolean RescaleNormals;
 672    GLboolean Scissor;
 673    GLboolean Stencil;
 674    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 675    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 676    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 677    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 678    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 679    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 680    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 681    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 682    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 683    /* SGI_texture_color_table */
 684    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 685    /* GL_ARB_vertex_program / GL_NV_vertex_program */
 686    GLboolean VertexProgram;
 687    GLboolean VertexProgramPointSize;
 688    GLboolean VertexProgramTwoSide;
 689    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 690    GLboolean PointSprite;
 691    GLboolean FragmentShaderATI;
 692 };
 693
 694
 695 /**
 696  * Evaluator attribute group (GL_EVAL_BIT).
 697  */
 698 struct gl_eval_attrib
 699 {
 700    /**
 701     * \name Enable bits
 702     */
 703    /*@{*/
 704    GLboolean Map1Color4;
 705    GLboolean Map1Index;
 706    GLboolean Map1Normal;
 707    GLboolean Map1TextureCoord1;
 708    GLboolean Map1TextureCoord2;
 709    GLboolean Map1TextureCoord3;
 710    GLboolean Map1TextureCoord4;
 711    GLboolean Map1Vertex3;
 712    GLboolean Map1Vertex4;
 713    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 714    GLboolean Map2Color4;
 715    GLboolean Map2Index;
 716    GLboolean Map2Normal;
 717    GLboolean Map2TextureCoord1;
 718    GLboolean Map2TextureCoord2;
 719    GLboolean Map2TextureCoord3;
 720    GLboolean Map2TextureCoord4;
 721    GLboolean Map2Vertex3;
 722    GLboolean Map2Vertex4;
 723    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 724    GLboolean AutoNormal;
 725    /*@}*/
 726
 727    /**
 728     * \name Map Grid endpoints and divisions and calculated du values
 729     */
 730    /*@{*/
 731    GLint MapGrid1un;
 732    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 733    GLint MapGrid2un, MapGrid2vn;
 734    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 735    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 736    /*@}*/
 737 };
 738
 739
 740 /**
 741  * Fog attribute group (GL_FOG_BIT).
 742  */
 743 struct gl_fog_attrib
 744 {
 745    GLboolean Enabled;           /**< Fog enabled flag */
 746    GLfloat Color[4];            /**< Fog color */
 747    GLfloat Density;             /**< Density >= 0.0 */
 748    GLfloat Start;               /**< Start distance in eye coords */
 749    GLfloat End;                 /**< End distance in eye coords */
 750    GLfloat Index;               /**< Fog index */
 751    GLenum Mode;                 /**< Fog mode */
 752    GLboolean ColorSumEnabled;
 753    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 754    GLfloat _Scale;              /**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
 755 };
 756
 757
 758 /**
 759  * Hint attribute group (GL_HINT_BIT).
 760  *
 761  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 762  */
 763 struct gl_hint_attrib
 764 {
 765    GLenum PerspectiveCorrection;
 766    GLenum PointSmooth;
 767    GLenum LineSmooth;
 768    GLenum PolygonSmooth;
 769    GLenum Fog;
 770    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 771    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 772    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 773    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 774 };
 775
 776
 777 /**
 778  * Histogram attributes.
 779  */
 780 struct gl_histogram_attrib
 781 {
 782    GLuint Width;                                /**< number of table entries */
 783    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 784    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 785    GLboolean Sink;                              /**< terminate image transfer? */
 786    GLubyte RedSize;                             /**< Bits per counter */
 787    GLubyte GreenSize;
 788    GLubyte BlueSize;
 789    GLubyte AlphaSize;
 790    GLubyte LuminanceSize;
 791 };
 792
 793
 794 /**
 795  * Color Min/max state.
 796  */
 797 struct gl_minmax_attrib
 798 {
 799    GLenum Format;
 800    GLboolean Sink;
 801    GLfloat Min[4], Max[4];   /**< RGBA */
 802 };
 803
 804
 805 /**
 806  * Image convolution state.
 807  */
 808 struct gl_convolution_attrib
 809 {
 810    GLenum Format;
 811    GLenum InternalFormat;
 812    GLuint Width;
 813    GLuint Height;
 814    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 815 };
 816
 817
 818 /**
 819  * Light state flags.
 820  */
 821 /*@{*/
 822 #define LIGHT_SPOT         0x1
 823 #define LIGHT_LOCAL_VIEWER 0x2
 824 #define LIGHT_POSITIONAL   0x4
 825 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 826 /*@}*/
 827
 828
 829 /**
 830  * Lighting attribute group (GL_LIGHT_BIT).
 831  */
 832 struct gl_light_attrib
 833 {
 834    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 835    struct gl_lightmodel Model;          /**< Lighting model */
 836
 837    /**
 838     * Must flush FLUSH_VERTICES before referencing:
 839     */
 840    /*@{*/
 841    struct gl_material Material;         /**< Includes front & back values */
 842    /*@}*/
 843
 844    GLboolean Enabled;                   /**< Lighting enabled flag */
 845    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 846    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 847    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 848    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 849    GLboolean ColorMaterialEnabled;
 850
 851    struct gl_light EnabledList;         /**< List sentinel */
 852
 853    /**
 854     * Derived state for optimizations:
 855     */
 856    /*@{*/
 857    GLboolean _NeedEyeCoords;
 858    GLboolean _NeedVertices;             /**< Use fast shader? */
 859    GLbitfield  _Flags;                  /**< LIGHT_* flags, see above */
 860    GLfloat _BaseColor[2][3];
 861    /*@}*/
 862 };
 863
 864
 865 /**
 866  * Line attribute group (GL_LINE_BIT).
 867  */
 868 struct gl_line_attrib
 869 {
 870    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 871    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 872    GLushort StipplePattern;     /**< Stipple pattern */
 873    GLint StippleFactor;         /**< Stipple repeat factor */
 874    GLfloat Width;               /**< Line width */
 875    GLfloat _Width;              /**< Clamped Line width */
 876 };
 877
 878
 879 /**
 880  * Display list attribute group (GL_LIST_BIT).
 881  */
 882 struct gl_list_attrib
 883 {
 884    GLuint ListBase;
 885 };
 886
 887
 888 /**
 889  * Used by device drivers to hook new commands into display lists.
 890  */
 891 struct gl_list_instruction
 892 {
 893    GLuint Size;
 894    void (*Execute)( GLcontext *ctx, void *data );
 895    void (*Destroy)( GLcontext *ctx, void *data );
 896    void (*Print)( GLcontext *ctx, void *data );
 897 };
 898
 899 #define MAX_DLIST_EXT_OPCODES 16
 900
 901 /**
 902  * Used by device drivers to hook new commands into display lists.
 903  */
 904 struct gl_list_extensions
 905 {
 906    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 907    GLuint NumOpcodes;
 908 };
 909
 910
 911 /**
 912  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 913  */
 914 struct gl_multisample_attrib
 915 {
 916    GLboolean Enabled;
 917    GLboolean SampleAlphaToCoverage;
 918    GLboolean SampleAlphaToOne;
 919    GLboolean SampleCoverage;
 920    GLfloat SampleCoverageValue;
 921    GLboolean SampleCoverageInvert;
 922 };
 923
 924
 925 /**
 926  * Pixel attribute group (GL_PIXEL_MODE_BIT).
 927  */
 928 struct gl_pixel_attrib
 929 {
 930    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
 931    GLfloat RedBias, RedScale;
 932    GLfloat GreenBias, GreenScale;
 933    GLfloat BlueBias, BlueScale;
 934    GLfloat AlphaBias, AlphaScale;
 935    GLfloat DepthBias, DepthScale;
 936    GLint IndexShift, IndexOffset;
 937    GLboolean MapColorFlag;
 938    GLboolean MapStencilFlag;
 939    GLfloat ZoomX, ZoomY;
 940    /* XXX move these out of gl_pixel_attrib */
 941    GLint MapStoSsize;           /**< Size of each pixel map */
 942    GLint MapItoIsize;
 943    GLint MapItoRsize;
 944    GLint MapItoGsize;
 945    GLint MapItoBsize;
 946    GLint MapItoAsize;
 947    GLint MapRtoRsize;
 948    GLint MapGtoGsize;
 949    GLint MapBtoBsize;
 950    GLint MapAtoAsize;
 951    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 952    GLfloat MapItoI[MAX_PIXEL_MAP_TABLE];
 953    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 954    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 955    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 956    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 957    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 958    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 959    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 960    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 961    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 962    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 963    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 964    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 965    /** GL_EXT_histogram */
 966    GLboolean HistogramEnabled;
 967    GLboolean MinMaxEnabled;
 968    /** GL_SGI_color_matrix */
 969    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 970    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 971    /** GL_SGI_color_table */
 972    GLfloat ColorTableScale[4];
 973    GLfloat ColorTableBias[4];
 974    GLboolean ColorTableEnabled;
 975    GLfloat PCCTscale[4];
 976    GLfloat PCCTbias[4];
 977    GLboolean PostConvolutionColorTableEnabled;
 978    GLfloat PCMCTscale[4];
 979    GLfloat PCMCTbias[4];
 980    GLboolean PostColorMatrixColorTableEnabled;
 981    /** GL_SGI_texture_color_table */
 982    GLfloat TextureColorTableScale[4];
 983    GLfloat TextureColorTableBias[4];
 984    /** Convolution */
 985    GLboolean Convolution1DEnabled;
 986    GLboolean Convolution2DEnabled;
 987    GLboolean Separable2DEnabled;
 988    GLfloat ConvolutionBorderColor[3][4];
 989    GLenum ConvolutionBorderMode[3];
 990    GLfloat ConvolutionFilterScale[3][4];
 991    GLfloat ConvolutionFilterBias[3][4];
 992    GLfloat PostConvolutionScale[4];  /**< RGBA */
 993    GLfloat PostConvolutionBias[4];   /**< RGBA */
 994 };
 995
 996
 997 /**
 998  * Point attribute group (GL_POINT_BIT).
 999  */
1000 struct gl_point_attrib
1001 {
1002    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1003    GLfloat Size;                /**< User-specified point size */
1004    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
1005    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1006    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1007    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1008    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1009    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
1010    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV/ARB_point_sprite */
1011    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1012    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1013 };
1014
1015
1016 /**
1017  * Polygon attribute group (GL_POLYGON_BIT).
1018  */
1019 struct gl_polygon_attrib
1020 {
1021    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1022    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1023    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1024    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1025    GLboolean CullFlag;          /**< Culling on/off flag */
1026    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1027    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1028    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1029    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1030    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1031    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1032    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1033    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1034 };
1035
1036
1037 /**
1038  * Scissor attributes (GL_SCISSOR_BIT).
1039  */
1040 struct gl_scissor_attrib
1041 {
1042    GLboolean Enabled;           /**< Scissor test enabled? */
1043    GLint X, Y;                  /**< Lower left corner of box */
1044    GLsizei Width, Height;       /**< Size of box */
1045 };
1046
1047
1048 /**
1049  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1050  */
1051 struct gl_stencil_attrib
1052 {
1053    GLboolean Enabled;           /**< Enabled flag */
1054    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1055    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1056    GLboolean _TestTwoSide;
1057    GLenum Function[2];          /**< Stencil function */
1058    GLenum FailFunc[2];          /**< Fail function */
1059    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1060    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1061    GLint Ref[2];                /**< Reference value */
1062    GLuint ValueMask[2];         /**< Value mask */
1063    GLuint WriteMask[2];         /**< Write mask */
1064    GLuint Clear;                /**< Clear value */
1065 };
1066
1067
1068 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
1069
1070 /**
1071  * An index for each type of texture object
1072  */
1073 /*@{*/
1074 #define TEXTURE_1D_INDEX    0
1075 #define TEXTURE_2D_INDEX    1
1076 #define TEXTURE_3D_INDEX    2
1077 #define TEXTURE_CUBE_INDEX  3
1078 #define TEXTURE_RECT_INDEX  4
1079 /*@}*/
1080
1081 /**
1082  * Bit flags for each type of texture object
1083  * Used for Texture.Unit[]._ReallyEnabled flags.
1084  */
1085 /*@{*/
1086 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
1087 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
1088 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
1089 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
1090 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
1091 /*@}*/
1092
1093
1094 /**
1095  * TexGenEnabled flags.
1096  */
1097 /*@{*/
1098 #define S_BIT 1
1099 #define T_BIT 2
1100 #define R_BIT 4
1101 #define Q_BIT 8
1102 /*@}*/
1103
1104
1105 /**
1106  * Bit flag versions of the corresponding GL_ constants.
1107  */
1108 /*@{*/
1109 #define TEXGEN_SPHERE_MAP        0x1
1110 #define TEXGEN_OBJ_LINEAR        0x2
1111 #define TEXGEN_EYE_LINEAR        0x4
1112 #define TEXGEN_REFLECTION_MAP_NV 0x8
1113 #define TEXGEN_NORMAL_MAP_NV     0x10
1114
1115 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1116                                   TEXGEN_REFLECTION_MAP_NV | \
1117                                   TEXGEN_NORMAL_MAP_NV)
1118 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1119                                   TEXGEN_REFLECTION_MAP_NV | \
1120                                   TEXGEN_NORMAL_MAP_NV     | \
1121                                   TEXGEN_EYE_LINEAR)
1122 /*@}*/
1123
1124
1125 /* A selection of state flags to make driver and module's lives easier. */
1126 #define ENABLE_TEXGEN0        0x1
1127 #define ENABLE_TEXGEN1        0x2
1128 #define ENABLE_TEXGEN2        0x4
1129 #define ENABLE_TEXGEN3        0x8
1130 #define ENABLE_TEXGEN4        0x10
1131 #define ENABLE_TEXGEN5        0x20
1132 #define ENABLE_TEXGEN6        0x40
1133 #define ENABLE_TEXGEN7        0x80
1134
1135 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1136 #define ENABLE_TEXMAT1        0x2
1137 #define ENABLE_TEXMAT2        0x4
1138 #define ENABLE_TEXMAT3        0x8
1139 #define ENABLE_TEXMAT4        0x10
1140 #define ENABLE_TEXMAT5        0x20
1141 #define ENABLE_TEXMAT6        0x40
1142 #define ENABLE_TEXMAT7        0x80
1143
1144 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1145 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1146
1147
1148 /**
1149  * Texel fetch function prototype.  We use texel fetch functions to
1150  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1151  * texture images.  These functions help to isolate us from the gritty
1152  * details of all the various texture image encodings.
1153  *
1154  * \param texImage texture image.
1155  * \param col texel column.
1156  * \param row texel row.
1157  * \param img texel image level/layer.
1158  * \param texelOut output texel (up to 4 GLchans)
1159  */
1160 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1161                                  GLint col, GLint row, GLint img,
1162                                  GLchan *texelOut );
1163
1164 /**
1165  * As above, but returns floats.
1166  * Used for depth component images and for upcoming signed/float
1167  * texture images.
1168  */
1169 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1170                                  GLint col, GLint row, GLint img,
1171                                  GLfloat *texelOut );
1172
1173
1174 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1175                                GLint col, GLint row, GLint img,
1176                                const void *texel);
1177
1178 /**
1179  * TexImage store function.  This is called by the glTex[Sub]Image
1180  * functions and is responsible for converting the user-specified texture
1181  * image into a specific (hardware) image format.
1182  */
1183 typedef GLboolean (*StoreTexImageFunc)(GLcontext *ctx, GLuint dims,
1184                           GLenum baseInternalFormat,
1185                           const struct gl_texture_format *dstFormat,
1186                           GLvoid *dstAddr,
1187                           GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
1188                           GLint dstRowStride, GLint dstImageStride,
1189                           GLint srcWidth, GLint srcHeight, GLint srcDepth,
1190                           GLenum srcFormat, GLenum srcType,
1191                           const GLvoid *srcAddr,
1192                           const struct gl_pixelstore_attrib *srcPacking);
1193
1194
1195
1196 /**
1197  * Texture format record
1198  */
1199 struct gl_texture_format
1200 {
1201    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1202
1203    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1204                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1205                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1206                                  *   GL_DEPTH_COMPONENT.
1207                                  */
1208    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1209    GLubyte RedBits;             /**< Bits per texel component */
1210    GLubyte GreenBits;           /**< These are just rough approximations for */
1211    GLubyte BlueBits;            /**< compressed texture formats. */
1212    GLubyte AlphaBits;
1213    GLubyte LuminanceBits;
1214    GLubyte IntensityBits;
1215    GLubyte IndexBits;
1216    GLubyte DepthBits;
1217    GLubyte StencilBits;         /**< GL_EXT_packed_depth_stencil */
1218
1219    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1220
1221    StoreTexImageFunc StoreImage;
1222
1223    /**
1224     * \name Texel fetch function pointers
1225     */
1226    /*@{*/
1227    FetchTexelFuncC FetchTexel1D;
1228    FetchTexelFuncC FetchTexel2D;
1229    FetchTexelFuncC FetchTexel3D;
1230    FetchTexelFuncF FetchTexel1Df;
1231    FetchTexelFuncF FetchTexel2Df;
1232    FetchTexelFuncF FetchTexel3Df;
1233    /*@}*/
1234
1235    StoreTexelFunc StoreTexel;
1236 };
1237
1238
1239 /**
1240  * Texture image state.  Describes the dimensions of a texture image,
1241  * the texel format and pointers to Texel Fetch functions.
1242  */
1243 struct gl_texture_image
1244 {
1245    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1246                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1247                                  *   GL_INTENSITY, GL_COLOR_INDEX,
1248                                  *   GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT
1249                                  *   only. Used for choosing TexEnv arithmetic.
1250                                  */
1251    GLint InternalFormat;        /**< Internal format as given by the user */
1252    GLuint Border;               /**< 0 or 1 */
1253    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1254    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1255    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1256    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1257    GLuint ImageStride;          /**< Stride between images, in texels */
1258    GLuint Width2;               /**< = Width - 2*Border */
1259    GLuint Height2;              /**< = Height - 2*Border */
1260    GLuint Depth2;               /**< = Depth - 2*Border */
1261    GLuint WidthLog2;            /**< = log2(Width2) */
1262    GLuint HeightLog2;           /**< = log2(Height2) */
1263    GLuint DepthLog2;            /**< = log2(Depth2) */
1264    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1265    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1266    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1267    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1268    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1269    GLboolean IsClientData;      /**< Data owned by client? */
1270    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1271
1272    const struct gl_texture_format *TexFormat;
1273
1274    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1275
1276    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1277    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1278
1279    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1280    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1281
1282    /**
1283     * \name For device driver:
1284     */
1285    /*@{*/
1286    void *DriverData;            /**< Arbitrary device driver data */
1287    /*@}*/
1288 };
1289
1290
1291 /**
1292  * Indexes for cube map faces.
1293  */
1294 /*@{*/
1295 #define FACE_POS_X   0
1296 #define FACE_NEG_X   1
1297 #define FACE_POS_Y   2
1298 #define FACE_NEG_Y   3
1299 #define FACE_POS_Z   4
1300 #define FACE_NEG_Z   5
1301 #define MAX_FACES  6
1302 /*@}*/
1303
1304
1305 /**
1306  * Texture object state.  Contains the array of mipmap images, border color,
1307  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1308  * color palette.
1309  */
1310 struct gl_texture_object
1311 {
1312    _glthread_Mutex Mutex;       /**< for thread safety */
1313    GLint RefCount;              /**< reference count */
1314    GLuint Name;                 /**< the user-visible texture object ID */
1315    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1316    GLfloat Priority;            /**< in [0,1] */
1317    GLfloat BorderColor[4];      /**< unclamped */
1318    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1319    GLenum WrapS;                /**< S-axis texture image wrap mode */
1320    GLenum WrapT;                /**< T-axis texture image wrap mode */
1321    GLenum WrapR;                /**< R-axis texture image wrap mode */
1322    GLenum MinFilter;            /**< minification filter */
1323    GLenum MagFilter;            /**< magnification filter */
1324    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1325    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1326    GLfloat LodBias;             /**< OpenGL 1.4 */
1327    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1328    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1329    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1330    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1331    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1332    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1333    GLenum CompareMode;          /**< GL_ARB_shadow */
1334    GLenum CompareFunc;          /**< GL_ARB_shadow */
1335    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1336    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1337    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1338    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1339    GLboolean Complete;          /**< Is texture object complete? */
1340
1341    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1342    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1343
1344    /** GL_EXT_paletted_texture */
1345    struct gl_color_table Palette;
1346
1347
1348    /**
1349     * \name For device driver.
1350     * Note: instead of attaching driver data to this pointer, it's preferable
1351     * to instead use this struct as a base class for your own texture object
1352     * class.  Driver->NewTextureObject() can be used to implement the
1353     * allocation.
1354     */
1355    void *DriverData;    /**< Arbitrary device driver data */
1356 };
1357
1358
1359 /**
1360  * Texture combine environment state.
1361  *
1362  * \todo
1363  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1364  * structure will need to be expanded for 4 elements.
1365  */
1366 struct gl_tex_env_combine_state
1367 {
1368    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1369    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1370    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1371    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1372    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1373    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1374    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1375    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1376    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1377    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1378 };
1379
1380
1381 /**
1382  * Texture unit state.  Contains enable flags, texture environment/function/
1383  * combiners, texgen state, pointers to current texture objects and
1384  * post-filter color tables.
1385  */
1386 struct gl_texture_unit
1387 {
1388    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1389    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1390
1391    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1392    GLfloat EnvColor[4];
1393    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1394    /** \name Tex coord generation mode
1395     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1396    /*@{*/
1397    GLenum GenModeS;
1398    GLenum GenModeT;
1399    GLenum GenModeR;
1400    GLenum GenModeQ;
1401    /*@}*/
1402    GLbitfield _GenBitS;
1403    GLbitfield _GenBitT;
1404    GLbitfield _GenBitR;
1405    GLbitfield _GenBitQ;
1406    GLbitfield _GenFlags;        /**< bitwise or of GenBit[STRQ] */
1407    GLfloat ObjectPlaneS[4];
1408    GLfloat ObjectPlaneT[4];
1409    GLfloat ObjectPlaneR[4];
1410    GLfloat ObjectPlaneQ[4];
1411    GLfloat EyePlaneS[4];
1412    GLfloat EyePlaneT[4];
1413    GLfloat EyePlaneR[4];
1414    GLfloat EyePlaneQ[4];
1415    GLfloat LodBias;             /**< for biasing mipmap levels */
1416
1417    /**
1418     * \name GL_EXT_texture_env_combine
1419     */
1420    struct gl_tex_env_combine_state Combine;
1421
1422    /**
1423     * Derived state based on \c EnvMode and the \c BaseFormat of the
1424     * currently enabled texture.
1425     */
1426    struct gl_tex_env_combine_state _EnvMode;
1427
1428    /**
1429     * Currently enabled combiner state.  This will point to either
1430     * \c Combine or \c _EnvMode.
1431     */
1432    struct gl_tex_env_combine_state *_CurrentCombine;
1433
1434    struct gl_texture_object *Current1D;
1435    struct gl_texture_object *Current2D;
1436    struct gl_texture_object *Current3D;
1437    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1438    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1439
1440    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1441
1442    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1443    struct gl_texture_object Saved2D;
1444    struct gl_texture_object Saved3D;
1445    struct gl_texture_object SavedCubeMap;
1446    struct gl_texture_object SavedRect;
1447
1448    /* GL_SGI_texture_color_table */
1449    struct gl_color_table ColorTable;
1450    struct gl_color_table ProxyColorTable;
1451    GLboolean ColorTableEnabled;
1452 };
1453
1454 struct texenvprog_cache {
1455    GLuint hash;
1456    void *key;
1457    void *data;
1458    struct texenvprog_cache *next;
1459 };
1460
1461 /**
1462  * Texture attribute group (GL_TEXTURE_BIT).
1463  */
1464 struct gl_texture_attrib
1465 {
1466    /**
1467     * name multitexture
1468     */
1469    /**@{*/
1470    GLuint CurrentUnit;         /**< Active texture unit */
1471    GLbitfield _EnabledUnits;  /**< one bit set for each really-enabled unit */
1472    GLbitfield _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1473    GLbitfield _GenFlags;            /**< for texgen */
1474    GLbitfield _TexGenEnabled;
1475    GLbitfield _TexMatEnabled;
1476    /**@}*/
1477
1478    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1479
1480    struct gl_texture_object *Proxy1D;
1481    struct gl_texture_object *Proxy2D;
1482    struct gl_texture_object *Proxy3D;
1483    struct gl_texture_object *ProxyCubeMap;
1484    struct gl_texture_object *ProxyRect;
1485
1486    /** GL_EXT_shared_texture_palette */
1487    GLboolean SharedPalette;
1488    struct gl_color_table Palette;
1489
1490    /** Cached texenv fragment programs */
1491    struct texenvprog_cache *env_fp_cache;
1492 };
1493
1494
1495 /**
1496  * Transformation attribute group (GL_TRANSFORM_BIT).
1497  */
1498 struct gl_transform_attrib
1499 {
1500    GLenum MatrixMode;                           /**< Matrix mode */
1501    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1502    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1503    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1504    GLboolean Normalize;                         /**< Normalize all normals? */
1505    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1506    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1507
1508    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1509    GLfloat CullEyePos[4];
1510    GLfloat CullObjPos[4];
1511 };
1512
1513
1514 /**
1515  * Viewport attribute group (GL_VIEWPORT_BIT).
1516  */
1517 struct gl_viewport_attrib
1518 {
1519    GLint X, Y;                  /**< position */
1520    GLsizei Width, Height;       /**< size */
1521    GLfloat Near, Far;           /**< Depth buffer range */
1522    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1523 };
1524
1525
1526 /**
1527  * Node for the attribute stack.
1528  */
1529 struct gl_attrib_node
1530 {
1531    GLbitfield kind;
1532    void *data;
1533    struct gl_attrib_node *next;
1534 };
1535
1536
1537 /**
1538  * GL_ARB_vertex/pixel_buffer_object buffer object
1539  */
1540 struct gl_buffer_object
1541 {
1542    GLint RefCount;
1543    GLuint Name;
1544    GLenum Usage;
1545    GLenum Access;
1546    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1547    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1548    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1549    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1550 };
1551
1552
1553
1554 /**
1555  * Client pixel packing/unpacking attributes
1556  */
1557 struct gl_pixelstore_attrib
1558 {
1559    GLint Alignment;
1560    GLint RowLength;
1561    GLint SkipPixels;
1562    GLint SkipRows;
1563    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1564    GLint SkipImages;      /**< for GL_EXT_texture3D */
1565    GLboolean SwapBytes;
1566    GLboolean LsbFirst;
1567    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1568    GLboolean Invert;        /**< GL_MESA_pack_invert */
1569    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1570 };
1571
1572
1573 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1574
1575
1576 /**
1577  * Client vertex array attributes
1578  */
1579 struct gl_client_array
1580 {
1581    GLint Size;                  /**< components per element (1,2,3,4) */
1582    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1583    GLsizei Stride;              /**< user-specified stride */
1584    GLsizei StrideB;             /**< actual stride in bytes */
1585    const GLubyte *Ptr;          /**< Points to array data */
1586    GLbitfield Enabled;          /**< one of the _NEW_ARRAY_ bits */
1587    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1588
1589    /**< GL_ARB_vertex_buffer_object */
1590    struct gl_buffer_object *BufferObj;
1591    GLuint _MaxElement;
1592
1593    GLbitfield Flags;
1594 };
1595
1596
1597 /**
1598  * Vertex array state
1599  */
1600 struct gl_array_attrib
1601 {
1602    struct gl_client_array Vertex;            /**< client data descriptors */
1603    struct gl_client_array Normal;
1604    struct gl_client_array Color;
1605    struct gl_client_array SecondaryColor;
1606    struct gl_client_array FogCoord;
1607    struct gl_client_array Index;
1608    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1609    struct gl_client_array EdgeFlag;
1610
1611    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1612
1613    GLint ActiveTexture;         /**< Client Active Texture */
1614    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1615    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1616
1617    GLbitfield _Enabled;         /**< _NEW_ARRAY_* - bit set if array enabled */
1618    GLbitfield NewState;         /**< _NEW_ARRAY_* */
1619
1620 #if FEATURE_ARB_vertex_buffer_object
1621    struct gl_buffer_object *NullBufferObj;
1622    struct gl_buffer_object *ArrayBufferObj;
1623    struct gl_buffer_object *ElementArrayBufferObj;
1624 #endif
1625    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1626 };
1627
1628
1629 /**
1630  * Feedback buffer state
1631  */
1632 struct gl_feedback
1633 {
1634    GLenum Type;
1635    GLbitfield _Mask;            /* FB_* bits */
1636    GLfloat *Buffer;
1637    GLuint BufferSize;
1638    GLuint Count;
1639 };
1640
1641
1642 /**
1643  * Selection buffer state
1644  */
1645 struct gl_selection
1646 {
1647    GLuint *Buffer;      /**< selection buffer */
1648    GLuint BufferSize;   /**< size of the selection buffer */
1649    GLuint BufferCount;  /**< number of values in the selection buffer */
1650    GLuint Hits;         /**< number of records in the selection buffer */
1651    GLuint NameStackDepth; /**< name stack depth */
1652    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1653    GLboolean HitFlag;   /**< hit flag */
1654    GLfloat HitMinZ;     /**< minimum hit depth */
1655    GLfloat HitMaxZ;     /**< maximum hit depth */
1656 };
1657
1658
1659 /**
1660  * 1-D Evaluator control points
1661  */
1662 struct gl_1d_map
1663 {
1664    GLuint Order;        /**< Number of control points */
1665    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1666    GLfloat *Points;     /**< Points to contiguous control points */
1667 };
1668
1669
1670 /**
1671  * 2-D Evaluator control points
1672  */
1673 struct gl_2d_map
1674 {
1675    GLuint Uorder;               /**< Number of control points in U dimension */
1676    GLuint Vorder;               /**< Number of control points in V dimension */
1677    GLfloat u1, u2, du;
1678    GLfloat v1, v2, dv;
1679    GLfloat *Points;             /**< Points to contiguous control points */
1680 };
1681
1682
1683 /**
1684  * All evaluator control point state
1685  */
1686 struct gl_evaluators
1687 {
1688    /**
1689     * \name 1-D maps
1690     */
1691    /*@{*/
1692    struct gl_1d_map Map1Vertex3;
1693    struct gl_1d_map Map1Vertex4;
1694    struct gl_1d_map Map1Index;
1695    struct gl_1d_map Map1Color4;
1696    struct gl_1d_map Map1Normal;
1697    struct gl_1d_map Map1Texture1;
1698    struct gl_1d_map Map1Texture2;
1699    struct gl_1d_map Map1Texture3;
1700    struct gl_1d_map Map1Texture4;
1701    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1702    /*@}*/
1703
1704    /**
1705     * \name 2-D maps
1706     */
1707    /*@{*/
1708    struct gl_2d_map Map2Vertex3;
1709    struct gl_2d_map Map2Vertex4;
1710    struct gl_2d_map Map2Index;
1711    struct gl_2d_map Map2Color4;
1712    struct gl_2d_map Map2Normal;
1713    struct gl_2d_map Map2Texture1;
1714    struct gl_2d_map Map2Texture2;
1715    struct gl_2d_map Map2Texture3;
1716    struct gl_2d_map Map2Texture4;
1717    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1718    /*@}*/
1719 };
1720
1721
1722 /**
1723  * State used during execution of fragment programs.
1724  */
1725 struct fp_machine
1726 {
1727    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1728    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1729    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1730    GLuint CondCodes[4];
1731 };
1732
1733
1734 /**
1735  * Names of the various vertex/fragment program register files, etc.
1736  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1737  * All values should fit in a 4-bit field.
1738  */
1739 enum register_file
1740 {
1741    PROGRAM_TEMPORARY = 0,
1742    PROGRAM_LOCAL_PARAM = 1,
1743    PROGRAM_ENV_PARAM = 2,
1744    PROGRAM_STATE_VAR = 3,
1745    PROGRAM_INPUT = 4,
1746    PROGRAM_OUTPUT = 5,
1747    PROGRAM_NAMED_PARAM = 6,
1748    PROGRAM_CONSTANT = 7,
1749    PROGRAM_WRITE_ONLY = 8,
1750    PROGRAM_ADDRESS = 9,
1751    PROGRAM_UNDEFINED = 15  /* invalid value */
1752 };
1753
1754
1755 /** Vertex and fragment instructions */
1756 struct prog_instruction;
1757 struct program_parameter_list;
1758
1759
1760 /**
1761  * Base class for any kind of program object
1762  */
1763 struct program
1764 {
1765    GLuint Id;
1766    GLubyte *String;          /**< Null-terminated program text */
1767    GLint RefCount;
1768    GLenum Target;
1769    GLenum Format;            /**< String encoding format */
1770    GLboolean Resident;
1771
1772    struct prog_instruction *Instructions;
1773
1774    GLbitfield InputsRead;     /* Bitmask of which input regs are read */
1775    GLbitfield OutputsWritten; /* Bitmask of which output regs are written to */
1776
1777    /** Named parameters, constants, etc. from program text */
1778    struct program_parameter_list *Parameters;
1779    /** Numbered local parameters */
1780    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1781
1782    /** Logical counts */
1783    /*@{*/
1784    GLuint NumInstructions;
1785    GLuint NumTemporaries;
1786    GLuint NumParameters;
1787    GLuint NumAttributes;
1788    GLuint NumAddressRegs;
1789    /*@}*/
1790    /** Native, actual h/w counts */
1791    /*@{*/
1792    GLuint NumNativeInstructions;
1793    GLuint NumNativeTemporaries;
1794    GLuint NumNativeParameters;
1795    GLuint NumNativeAttributes;
1796    GLuint NumNativeAddressRegs;
1797    /*@}*/
1798 };
1799
1800
1801 /** Vertex program object */
1802 struct vertex_program
1803 {
1804    struct program Base;   /* base class */
1805    GLboolean IsNVProgram; /* GL_NV_vertex_program ? */
1806    GLboolean IsPositionInvariant;  /* GL_ARB_vertex_program / GL_NV_vertex_program1_1 */
1807    void *TnlData;               /* should probably use Base.DriverData */
1808 };
1809
1810
1811 /** Fragment program object */
1812 struct fragment_program
1813 {
1814    struct program Base;   /**< base class */
1815    GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1816    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1817    GLuint NumTexInstructions;
1818    GLuint NumTexIndirections;
1819    GLuint NumNativeAluInstructions; /**< GL_ARB_fragment_program */
1820    GLuint NumNativeTexInstructions;
1821    GLuint NumNativeTexIndirections;
1822    GLenum FogOption;
1823    GLboolean UsesKill;
1824 };
1825
1826
1827 /**
1828  * State common to vertex and fragment programs.
1829  */
1830 struct gl_program_state
1831 {
1832    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1833    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1834 };
1835
1836
1837 /**
1838  * State vars for GL_ARB/GL_NV_vertex_program
1839  */
1840 struct gl_vertex_program_state
1841 {
1842    GLboolean Enabled;                  /**< GL_VERTEX_PROGRAM_ARB/NV */
1843    GLboolean _Enabled;                 /**< Enabled and valid program? */
1844    GLboolean PointSizeEnabled;         /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1845    GLboolean TwoSideEnabled;           /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1846    struct vertex_program *Current;     /**< ptr to currently bound program */
1847    struct vertex_program *_Current;    /**< ptr to currently bound
1848                                            program, including internal
1849                                            (t_vp_build.c) programs */
1850
1851    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1852    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1853
1854    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1855    /* Only used during program execution (may be moved someday): */
1856    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1857    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1858    GLuint InputsSize[MAX_NV_VERTEX_PROGRAM_INPUTS];
1859    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1860    GLint AddressReg[4];
1861
1862 #if FEATURE_MESA_program_debug
1863    GLprogramcallbackMESA Callback;
1864    GLvoid *CallbackData;
1865    GLboolean CallbackEnabled;
1866    GLuint CurrentPosition;
1867 #endif
1868 };
1869
1870
1871 /**
1872  * Context state for GL_ARB/NV_fragment_program
1873  */
1874 struct gl_fragment_program_state
1875 {
1876    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1877    GLboolean _Enabled;                   /* Enabled and valid program? */
1878    GLboolean _Active;
1879    struct fragment_program *Current;     /* ptr to currently bound program */
1880    struct fragment_program *_Current;    /* ptr to currently active program
1881                                             (including internal programs) */
1882    struct fp_machine Machine;            /* machine state */
1883    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1884
1885 #if FEATURE_MESA_program_debug
1886    GLprogramcallbackMESA Callback;
1887    GLvoid *CallbackData;
1888    GLboolean CallbackEnabled;
1889    GLuint CurrentPosition;
1890 #endif
1891 };
1892
1893
1894 /**
1895  * ATI_fragment_shader runtime state
1896  */
1897 #define ATI_FS_INPUT_PRIMARY 0
1898 #define ATI_FS_INPUT_SECONDARY 1
1899
1900 struct atifs_instruction;
1901 struct atifs_setupinst;
1902
1903 /**
1904  * State for executing ATI fragment shader.
1905  */
1906 struct atifs_machine
1907 {
1908    GLfloat Registers[6][4];         /** six temporary registers */
1909    GLfloat PrevPassRegisters[6][4];
1910    GLfloat Inputs[2][4];   /** Primary, secondary input colors */
1911 };
1912
1913
1914 /**
1915  * ATI fragment shader
1916  */
1917 struct ati_fragment_shader
1918 {
1919    GLuint Id;
1920    GLint RefCount;
1921    struct atifs_instruction *Instructions[2];
1922    struct atifs_setupinst *SetupInst[2];
1923    GLfloat Constants[8][4];
1924    GLbitfield LocalConstDef;  /** Indicates which constants have been set */
1925    GLubyte numArithInstr[2];
1926    GLubyte regsAssigned[2];
1927    GLubyte NumPasses;         /** 1 or 2 */
1928    GLubyte cur_pass;
1929    GLubyte last_optype;
1930    GLboolean interpinp1;
1931    GLboolean isValid;
1932    GLuint swizzlerq;
1933 };
1934
1935 /**
1936  * Context state for GL_ATI_fragment_shader
1937  */
1938 struct gl_ati_fragment_shader_state
1939 {
1940    GLboolean Enabled;
1941    GLboolean _Enabled;                      /** enabled and valid shader? */
1942    GLboolean Compiling;
1943    GLfloat GlobalConstants[8][4];
1944    struct atifs_machine Machine;            /* machine state */
1945    struct ati_fragment_shader *Current;
1946 };
1947
1948
1949 /**
1950  * Occlusion/timer query object.
1951  */
1952 struct gl_query_object
1953 {
1954    GLuint Id;
1955    GLuint64EXT Result; /* the counter */
1956    GLboolean Active;   /* inside Begin/EndQuery */
1957    GLboolean Ready;    /* result is ready */
1958 };
1959
1960
1961 /**
1962  * Context state for query objects.
1963  */
1964 struct gl_query_state
1965 {
1966    struct _mesa_HashTable *QueryObjects;
1967    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
1968    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
1969 };
1970
1971
1972 /**
1973  * Context state for vertex/fragment shaders.
1974  */
1975 struct gl_shader_objects_state
1976 {
1977    struct gl2_program_intf **CurrentProgram;
1978    GLboolean _VertexShaderPresent;
1979    GLboolean _FragmentShaderPresent;
1980 };
1981
1982
1983 /**
1984  * State which can be shared by multiple contexts:
1985  */
1986 struct gl_shared_state
1987 {
1988    _glthread_Mutex Mutex;                  /**< for thread safety */
1989    GLint RefCount;                         /**< Reference count */
1990    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
1991    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
1992
1993    /**
1994     * \name Default texture objects (shared by all multi-texture units)
1995     */
1996    /*@{*/
1997    struct gl_texture_object *Default1D;
1998    struct gl_texture_object *Default2D;
1999    struct gl_texture_object *Default3D;
2000    struct gl_texture_object *DefaultCubeMap;
2001    struct gl_texture_object *DefaultRect;
2002    /*@}*/
2003
2004    /**
2005     * \name Vertex/fragment programs
2006     */
2007    /*@{*/
2008    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2009 #if FEATURE_ARB_vertex_program
2010    struct program *DefaultVertexProgram;
2011 #endif
2012 #if FEATURE_ARB_fragment_program
2013    struct program *DefaultFragmentProgram;
2014 #endif
2015    /*@}*/
2016
2017 #if FEATURE_ATI_fragment_shader
2018    struct _mesa_HashTable *ATIShaders;
2019    struct ati_fragment_shader *DefaultFragmentShader;
2020 #endif
2021
2022 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2023    struct _mesa_HashTable *BufferObjects;
2024 #endif
2025
2026    struct _mesa_HashTable *GL2Objects;
2027
2028 #if FEATURE_EXT_framebuffer_object
2029    struct _mesa_HashTable *RenderBuffers;
2030    struct _mesa_HashTable *FrameBuffers;
2031 #endif
2032
2033    void *DriverData;  /**< Device driver shared state */
2034 };
2035
2036
2037
2038
2039 /**
2040  * A renderbuffer stores colors or depth values or stencil values.
2041  * A framebuffer object will have a collection of these.
2042  * Data are read/written to the buffer with a handful of Get/Put functions.
2043  *
2044  * Instances of this object are allocated with the Driver's NewRenderbuffer
2045  * hook.  Drivers will likely wrap this class inside a driver-specific
2046  * class to simulate inheritance.
2047  */
2048 struct gl_renderbuffer
2049 {
2050    _glthread_Mutex Mutex;                  /**< for thread safety */
2051    GLuint ClassID;        /**< Useful for drivers */
2052    GLuint Name;
2053    GLint RefCount;
2054    GLuint Width, Height;
2055    GLenum InternalFormat; /**< The user-specified format */
2056    GLenum _ActualFormat;  /**< The driver-chosen format */
2057    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2058                                GL_STENCIL_INDEX. */
2059    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2060    GLubyte RedBits;      /**< Bits of red per pixel */
2061    GLubyte GreenBits;
2062    GLubyte BlueBits;
2063    GLubyte AlphaBits;
2064    GLubyte IndexBits;
2065    GLubyte DepthBits;
2066    GLubyte StencilBits;
2067    GLvoid *Data;
2068
2069    /* Used to wrap one renderbuffer around another: */
2070    struct gl_renderbuffer *Wrapped;
2071
2072    /* Delete this renderbuffer */
2073    void (*Delete)(struct gl_renderbuffer *rb);
2074
2075    /* Allocate new storage for this renderbuffer */
2076    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2077                              GLenum internalFormat,
2078                              GLuint width, GLuint height);
2079
2080    /* Lock/Unlock are called before/after calling the Get/Put functions.
2081     * Not sure this is the right place for these yet.
2082    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2083    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2084     */
2085
2086    /* Return a pointer to the element/pixel at (x,y).
2087     * Should return NULL if the buffer memory can't be directly addressed.
2088     */
2089    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2090                        GLint x, GLint y);
2091
2092    /* Get/Read a row of values.
2093     * The values will be of format _BaseFormat and type DataType.
2094     */
2095    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2096                   GLint x, GLint y, void *values);
2097
2098    /* Get/Read values at arbitrary locations.
2099     * The values will be of format _BaseFormat and type DataType.
2100     */
2101    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2102                      const GLint x[], const GLint y[], void *values);
2103
2104    /* Put/Write a row of values.
2105     * The values will be of format _BaseFormat and type DataType.
2106     */
2107    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2108                   GLint x, GLint y, const void *values, const GLubyte *mask);
2109
2110    /* Put/Write a row of RGB values.  This is a special-case routine that's
2111     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2112     * a common case for glDrawPixels and some triangle routines.
2113     * The values will be of format GL_RGB and type DataType.
2114     */
2115    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2116                     GLint x, GLint y, const void *values, const GLubyte *mask);
2117
2118
2119    /* Put/Write a row of identical values.
2120     * The values will be of format _BaseFormat and type DataType.
2121     */
2122    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2123                      GLint x, GLint y, const void *value, const GLubyte *mask);
2124
2125    /* Put/Write values at arbitrary locations.
2126     * The values will be of format _BaseFormat and type DataType.
2127     */
2128    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2129                      const GLint x[], const GLint y[], const void *values,
2130                      const GLubyte *mask);
2131    /* Put/Write identical values at arbitrary locations.
2132     * The values will be of format _BaseFormat and type DataType.
2133     */
2134    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2135                          GLuint count, const GLint x[], const GLint y[],
2136                          const void *value, const GLubyte *mask);
2137 };
2138
2139
2140 /**
2141  * A renderbuffer attachment point points to either a texture object
2142  * (and specifies a mipmap level, cube face or 3D texture slice) or
2143  * points to a renderbuffer.
2144  */
2145 struct gl_renderbuffer_attachment
2146 {
2147    GLenum Type;  /* GL_NONE or GL_TEXTURE or GL_RENDERBUFFER_EXT */
2148    GLboolean Complete;
2149
2150    /* IF Type == GL_RENDERBUFFER_EXT: */
2151    struct gl_renderbuffer *Renderbuffer;
2152
2153    /* IF Type == GL_TEXTURE: */
2154    struct gl_texture_object *Texture;
2155    GLuint TextureLevel;
2156    GLuint CubeMapFace;  /* 0 .. 5, for cube map textures */
2157    GLuint Zoffset;      /* for 3D textures */
2158 };
2159
2160
2161 /**
2162  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2163  * In C++ terms, think of this as a base class from which device drivers
2164  * will make derived classes.
2165  */
2166 struct gl_framebuffer
2167 {
2168    _glthread_Mutex Mutex;                  /**< for thread safety */
2169    GLuint Name;      /* if zero, this is a window system framebuffer */
2170    GLint RefCount;
2171
2172    GLvisual Visual;     /**< The framebuffer's visual.
2173                              Immutable if this is a window system buffer.
2174                              Computed from attachments if user-made FBO. */
2175
2176    GLboolean Initialized;
2177
2178    GLuint Width, Height;        /**< size of frame buffer in pixels */
2179
2180    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2181    /*@{*/
2182    GLint _Xmin, _Xmax;  /**< inclusive */
2183    GLint _Ymin, _Ymax;  /**< exclusive */
2184    /*@}*/
2185
2186    /** \name  Derived Z buffer stuff */
2187    /*@{*/
2188    GLuint _DepthMax;    /**< Max depth buffer value */
2189    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2190    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2191    /*@}*/
2192
2193    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2194
2195    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2196    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2197
2198    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2199     * attribute group and GL_PIXEL attribute group, respectively.
2200     */
2201    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2202    GLenum ColorReadBuffer;
2203
2204    /* These are computed from ColorDrawBuffer and ColorReadBuffer */
2205    GLbitfield _ColorDrawBufferMask[MAX_DRAW_BUFFERS]; /* Mask of BUFFER_BIT_* flags */
2206    GLint _ColorReadBufferIndex; /* -1 = None */
2207
2208    /* These are computed from _ColorDrawBufferMask and _ColorReadBufferIndex */
2209    GLuint _NumColorDrawBuffers[MAX_DRAW_BUFFERS];
2210    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS][4];
2211    struct gl_renderbuffer *_ColorReadBuffer;
2212
2213    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2214     * depth/stencil buffers attached above. */
2215    struct gl_renderbuffer *_DepthBuffer;
2216    struct gl_renderbuffer *_StencilBuffer;
2217
2218    /** Delete this framebuffer */
2219    void (*Delete)(struct gl_framebuffer *fb);
2220 };
2221
2222
2223 /**
2224  * Limits for vertex and fragment programs.
2225  */
2226 struct gl_program_constants
2227 {
2228    /* logical limits */
2229    GLuint MaxInstructions;
2230    GLuint MaxAluInstructions; /* fragment programs only, for now */
2231    GLuint MaxTexInstructions; /* fragment programs only, for now */
2232    GLuint MaxTexIndirections; /* fragment programs only, for now */
2233    GLuint MaxAttribs;
2234    GLuint MaxTemps;
2235    GLuint MaxAddressRegs; /* vertex program only, for now */
2236    GLuint MaxParameters;
2237    GLuint MaxLocalParams;
2238    GLuint MaxEnvParams;
2239    /* native/hardware limits */
2240    GLuint MaxNativeInstructions;
2241    GLuint MaxNativeAluInstructions; /* fragment programs only, for now */
2242    GLuint MaxNativeTexInstructions; /* fragment programs only, for now */
2243    GLuint MaxNativeTexIndirections; /* fragment programs only, for now */
2244    GLuint MaxNativeAttribs;
2245    GLuint MaxNativeTemps;
2246    GLuint MaxNativeAddressRegs; /* vertex program only, for now */
2247    GLuint MaxNativeParameters;
2248 };
2249
2250
2251 /**
2252  * Constants which may be overridden by device driver during context creation
2253  * but are never changed after that.
2254  */
2255 struct gl_constants
2256 {
2257    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2258    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2259    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2260    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2261    GLuint MaxTextureCoordUnits;
2262    GLuint MaxTextureImageUnits;
2263    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
2264    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2265    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2266    GLuint MaxArrayLockSize;
2267    GLint SubPixelBits;
2268    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2269    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2270    GLfloat PointSizeGranularity;
2271    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2272    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2273    GLfloat LineWidthGranularity;
2274    GLuint MaxColorTableSize;
2275    GLuint MaxConvolutionWidth;
2276    GLuint MaxConvolutionHeight;
2277    GLuint MaxClipPlanes;
2278    GLuint MaxLights;
2279    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2280    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2281    GLuint MaxViewportWidth, MaxViewportHeight;
2282    struct gl_program_constants VertexProgram;    /* GL_ARB_vertex_program */
2283    struct gl_program_constants FragmentProgram;  /* GL_ARB_fragment_program */
2284    /* shared by vertex and fragment program: */
2285    GLuint MaxProgramMatrices;
2286    GLuint MaxProgramMatrixStackDepth;
2287    /* vertex array / buffer object bounds checking */
2288    GLboolean CheckArrayBounds;
2289    /* GL_ARB_draw_buffers */
2290    GLuint MaxDrawBuffers;
2291    /* GL_OES_read_format */
2292    GLenum ColorReadFormat;
2293    GLenum ColorReadType;
2294    /* GL_EXT_framebuffer_object */
2295    GLuint MaxColorAttachments;
2296    GLuint MaxRenderbufferSize;
2297 };
2298
2299
2300 /**
2301  * Enable flag for each OpenGL extension.  Different device drivers will
2302  * enable different extensions at runtime.
2303  */
2304 struct gl_extensions
2305 {
2306    /**
2307     * \name Flags to quickly test if certain extensions are available.
2308     *
2309     * Not every extension needs to have such a flag, but it's encouraged.
2310     */
2311    /*@{*/
2312    GLboolean dummy;  /* don't remove this! */
2313    GLboolean ARB_depth_texture;
2314    GLboolean ARB_draw_buffers;
2315    GLboolean ARB_fragment_program;
2316    GLboolean ARB_fragment_shader;
2317    GLboolean ARB_half_float_pixel;
2318    GLboolean ARB_imaging;
2319    GLboolean ARB_multisample;
2320    GLboolean ARB_multitexture;
2321    GLboolean ARB_occlusion_query;
2322    GLboolean ARB_point_sprite;
2323    GLboolean ARB_shader_objects;
2324    GLboolean ARB_shading_language_100;
2325    GLboolean ARB_shadow;
2326    GLboolean ARB_texture_border_clamp;
2327    GLboolean ARB_texture_compression;
2328    GLboolean ARB_texture_cube_map;
2329    GLboolean ARB_texture_env_combine;
2330    GLboolean ARB_texture_env_crossbar;
2331    GLboolean ARB_texture_env_dot3;
2332    GLboolean ARB_texture_float;
2333    GLboolean ARB_texture_mirrored_repeat;
2334    GLboolean ARB_texture_non_power_of_two;
2335    GLboolean ARB_transpose_matrix;
2336    GLboolean ARB_vertex_buffer_object;
2337    GLboolean ARB_vertex_program;
2338    GLboolean ARB_vertex_shader;
2339    GLboolean ARB_window_pos;
2340    GLboolean EXT_abgr;
2341    GLboolean EXT_bgra;
2342    GLboolean EXT_blend_color;
2343    GLboolean EXT_blend_equation_separate;
2344    GLboolean EXT_blend_func_separate;
2345    GLboolean EXT_blend_logic_op;
2346    GLboolean EXT_blend_minmax;
2347    GLboolean EXT_blend_subtract;
2348    GLboolean EXT_clip_volume_hint;
2349    GLboolean EXT_cull_vertex;
2350    GLboolean EXT_convolution;
2351    GLboolean EXT_compiled_vertex_array;
2352    GLboolean EXT_copy_texture;
2353    GLboolean EXT_depth_bounds_test;
2354    GLboolean EXT_draw_range_elements;
2355    GLboolean EXT_framebuffer_object;
2356    GLboolean EXT_fog_coord;
2357    GLboolean EXT_framebuffer_blit;
2358    GLboolean EXT_histogram;
2359    GLboolean EXT_multi_draw_arrays;
2360    GLboolean EXT_paletted_texture;
2361    GLboolean EXT_packed_depth_stencil;
2362    GLboolean EXT_packed_pixels;
2363    GLboolean EXT_pixel_buffer_object;
2364    GLboolean EXT_point_parameters;
2365    GLboolean EXT_polygon_offset;
2366    GLboolean EXT_rescale_normal;
2367    GLboolean EXT_shadow_funcs;
2368    GLboolean EXT_secondary_color;
2369    GLboolean EXT_separate_specular_color;
2370    GLboolean EXT_shared_texture_palette;
2371    GLboolean EXT_stencil_wrap;
2372    GLboolean EXT_stencil_two_side;
2373    GLboolean EXT_subtexture;
2374    GLboolean EXT_texture;
2375    GLboolean EXT_texture_object;
2376    GLboolean EXT_texture3D;
2377    GLboolean EXT_texture_compression_s3tc;
2378    GLboolean EXT_texture_env_add;
2379    GLboolean EXT_texture_env_combine;
2380    GLboolean EXT_texture_env_dot3;
2381    GLboolean EXT_texture_filter_anisotropic;
2382    GLboolean EXT_texture_lod_bias;
2383    GLboolean EXT_texture_mirror_clamp;
2384    GLboolean EXT_timer_query;
2385    GLboolean EXT_vertex_array;
2386    GLboolean EXT_vertex_array_set;
2387    /* vendor extensions */
2388    GLboolean APPLE_client_storage;
2389    GLboolean APPLE_packed_pixels;
2390    GLboolean ATI_texture_mirror_once;
2391    GLboolean ATI_texture_env_combine3;
2392    GLboolean ATI_fragment_shader;
2393    GLboolean IBM_rasterpos_clip;
2394    GLboolean IBM_multimode_draw_arrays;
2395    GLboolean MESA_pack_invert;
2396    GLboolean MESA_packed_depth_stencil;
2397    GLboolean MESA_program_debug;
2398    GLboolean MESA_resize_buffers;
2399    GLboolean MESA_ycbcr_texture;
2400    GLboolean NV_blend_square;
2401    GLboolean NV_fragment_program;
2402    GLboolean NV_light_max_exponent;
2403    GLboolean NV_point_sprite;
2404    GLboolean NV_texgen_reflection;
2405    GLboolean NV_texture_rectangle;
2406    GLboolean NV_vertex_program;
2407    GLboolean NV_vertex_program1_1;
2408    GLboolean OES_read_format;
2409    GLboolean SGI_color_matrix;
2410    GLboolean SGI_color_table;
2411    GLboolean SGI_texture_color_table;
2412    GLboolean SGIS_generate_mipmap;
2413    GLboolean SGIS_texture_edge_clamp;
2414    GLboolean SGIS_texture_lod;
2415    GLboolean SGIX_depth_texture;
2416    GLboolean SGIX_shadow;
2417    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2418    GLboolean TDFX_texture_compression_FXT1;
2419    GLboolean S3_s3tc;
2420    /*@}*/
2421    /* The extension string */
2422    const GLubyte *String;
2423 };
2424
2425
2426 /**
2427  * A stack of matrices (projection, modelview, color, texture, etc).
2428  */
2429 struct matrix_stack
2430 {
2431    GLmatrix *Top;      /**< points into Stack */
2432    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2433    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2434    GLuint MaxDepth;    /**< size of Stack[] array */
2435    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2436 };
2437
2438
2439 /**
2440  * \name Bits for image transfer operations
2441  *
2442  * \sa __GLcontextRec::ImageTransferState.
2443  */
2444 /*@{*/
2445 #define IMAGE_SCALE_BIAS_BIT                      0x1
2446 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2447 #define IMAGE_MAP_COLOR_BIT                       0x4
2448 #define IMAGE_COLOR_TABLE_BIT                     0x8
2449 #define IMAGE_CONVOLUTION_BIT                     0x10
2450 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2451 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2452 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2453 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2454 #define IMAGE_HISTOGRAM_BIT                       0x200
2455 #define IMAGE_MIN_MAX_BIT                         0x400
2456 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2457
2458
2459 /** Pixel Transfer ops up to convolution */
2460 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2461                                     IMAGE_SHIFT_OFFSET_BIT |   \
2462                                     IMAGE_MAP_COLOR_BIT |      \
2463                                     IMAGE_COLOR_TABLE_BIT)
2464
2465 /** Pixel transfer ops after convolution */
2466 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2467                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2468                                      IMAGE_COLOR_MATRIX_BIT |                 \
2469                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2470                                      IMAGE_HISTOGRAM_BIT |                    \
2471                                      IMAGE_MIN_MAX_BIT)
2472 /*@}*/
2473
2474
2475 /**
2476  * \name Bits to indicate what state has changed.
2477  *
2478  * 4 unused flags.
2479  */
2480 /*@{*/
2481 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2482 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2483 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2484 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2485 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2486 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2487 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2488 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2489 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2490 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2491 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2492 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2493 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2494 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2495 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2496 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2497 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2498 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2499 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2500 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2501 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2502 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2503 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2504 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2505 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2506 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2507 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2508 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2509 #define _NEW_ALL ~0
2510 /*@}*/
2511
2512
2513 /**
2514  * \name Bits to track array state changes
2515  *
2516  * Also used to summarize array enabled.
2517  */
2518 /*@{*/
2519 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2520 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2521 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2522 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2523 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2524 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2525 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
2526 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
2527 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2528 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2529 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2530 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2531 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2532 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2533 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2534 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2535 #define _NEW_ARRAY_ATTRIB_0         0x10000  /* start at bit 16 */
2536 #define _NEW_ARRAY_ALL              0xffffffff
2537
2538
2539 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2540 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2541 /*@}*/
2542
2543
2544 /**
2545  * \name A bunch of flags that we think might be useful to drivers.
2546  *
2547  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2548  */
2549 /*@{*/
2550 #define DD_FLATSHADE                0x1
2551 #define DD_SEPARATE_SPECULAR        0x2
2552 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2553 #define DD_TRI_LIGHT_TWOSIDE        0x8
2554 #define DD_TRI_UNFILLED             0x10
2555 #define DD_TRI_SMOOTH               0x20
2556 #define DD_TRI_STIPPLE              0x40
2557 #define DD_TRI_OFFSET               0x80
2558 #define DD_LINE_SMOOTH              0x100
2559 #define DD_LINE_STIPPLE             0x200
2560 #define DD_LINE_WIDTH               0x400
2561 #define DD_POINT_SMOOTH             0x800
2562 #define DD_POINT_SIZE               0x1000
2563 #define DD_POINT_ATTEN              0x2000
2564 #define DD_TRI_TWOSTENCIL           0x4000
2565 /*@}*/
2566
2567
2568 /**
2569  * \name Define the state changes under which each of these bits might change
2570  */
2571 /*@{*/
2572 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2573 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2574 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2575 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2576 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2577 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2578 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2579 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2580 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2581 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2582 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2583 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2584 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2585 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2586 /*@}*/
2587
2588
2589 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2590                                            _NEW_TEXTURE |       \
2591                                            _NEW_POINT |         \
2592                                            _NEW_MODELVIEW)
2593
2594 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2595                                            _NEW_TEXTURE)
2596
2597 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2598
2599
2600
2601
2602 /*
2603  * Forward declaration of display list data types:
2604  */
2605 union node;
2606 typedef union node Node;
2607
2608
2609 /* This has to be included here. */
2610 #include "dd.h"
2611
2612
2613 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2614
2615 /**
2616  * Core Mesa's support for tnl modules:
2617  */
2618 struct gl_tnl_module
2619 {
2620    /**
2621     * Vertex format to be lazily swapped into current dispatch.
2622     */
2623    const GLvertexformat *Current;
2624
2625    /**
2626     * \name Record of functions swapped out.
2627     * On restore, only need to swap these functions back in.
2628     */
2629    /*@{*/
2630    struct {
2631        _glapi_proc * location;
2632        _glapi_proc function;
2633    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2634    GLuint SwapCount;
2635    /*@}*/
2636 };
2637
2638 /* Strictly this is a tnl/ private concept, but it doesn't seem
2639  * worthwhile adding a tnl private structure just to hold this one bit
2640  * of information:
2641  */
2642 #define MESA_DLIST_DANGLING_REFS     0x1
2643
2644 /* Provide a location where information about a display list can be
2645  * collected.  Could be extended with driverPrivate structures,
2646  * etc. in the future.
2647  */
2648 struct mesa_display_list
2649 {
2650    Node *node;
2651    GLuint id;
2652    GLbitfield flags;
2653 };
2654
2655
2656 /**
2657  * State used during display list compilation and execution.
2658  */
2659 struct mesa_list_state
2660 {
2661    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2662    GLuint CallDepth;            /**< Current recursion calling depth */
2663
2664    struct mesa_display_list *CurrentList;
2665    Node *CurrentListPtr;        /**< Head of list being compiled */
2666    GLuint CurrentListNum;       /**< Number of the list being compiled */
2667    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2668    GLuint CurrentPos;           /**< Index into current block of nodes */
2669
2670    GLvertexformat ListVtxfmt;
2671
2672    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2673    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2674
2675    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2676    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2677
2678    GLubyte ActiveIndex;
2679    GLfloat CurrentIndex;
2680
2681    GLubyte ActiveEdgeFlag;
2682    GLboolean CurrentEdgeFlag;
2683 };
2684
2685
2686 /**
2687  * Mesa rendering context.
2688  *
2689  * This is the central context data structure for Mesa.  Almost all
2690  * OpenGL state is contained in this structure.
2691  * Think of this as a base class from which device drivers will derive
2692  * sub classes.
2693  *
2694  * The GLcontext typedef names this structure.
2695  */
2696 struct __GLcontextRec
2697 {
2698    /**
2699     * \name OS related interfaces.
2700     *
2701     * These \b must be the first members of this structure, because they are
2702     * exposed to the outside world (i.e. GLX extension).
2703     */
2704    /*@{*/
2705    __GLimports imports;
2706    __GLexports exports;
2707    /*@}*/
2708
2709    /** State possibly shared with other contexts in the address space */
2710    struct gl_shared_state *Shared;
2711
2712    /** \name API function pointer tables */
2713    /*@{*/
2714    struct _glapi_table *Save;   /**< Display list save functions */
2715    struct _glapi_table *Exec;   /**< Execute functions */
2716    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2717    /*@}*/
2718
2719    GLvisual Visual;
2720    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2721    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2722    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2723    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2724
2725    /**
2726     * Device driver function pointer table
2727     */
2728    struct dd_function_table Driver;
2729
2730    void *DriverCtx;     /**< Points to device driver context/state */
2731    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2732
2733    /** Core/Driver constants */
2734    struct gl_constants Const;
2735
2736    /** \name The various 4x4 matrix stacks */
2737    /*@{*/
2738    struct matrix_stack ModelviewMatrixStack;
2739    struct matrix_stack ProjectionMatrixStack;
2740    struct matrix_stack ColorMatrixStack;
2741    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2742    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2743    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2744    /*@}*/
2745
2746    /** Combined modelview and projection matrix */
2747    GLmatrix _ModelProjectMatrix;
2748
2749    /** \name Display lists */
2750    struct mesa_list_state ListState;
2751
2752    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2753    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2754
2755    /** Extension information */
2756    struct gl_extensions Extensions;
2757
2758    /** \name State attribute stack (for glPush/PopAttrib) */
2759    /*@{*/
2760    GLuint AttribStackDepth;
2761    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2762    /*@}*/
2763
2764    /** \name Renderer attribute groups
2765     *
2766     * We define a struct for each attribute group to make pushing and popping
2767     * attributes easy.  Also it's a good organization.
2768     */
2769    /*@{*/
2770    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
2771    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
2772    struct gl_current_attrib     Current;        /**< Current attributes */
2773    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2774    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2775    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2776    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2777    struct gl_light_attrib       Light;          /**< Light attributes */
2778    struct gl_line_attrib        Line;           /**< Line attributes */
2779    struct gl_list_attrib        List;           /**< List attributes */
2780    struct gl_multisample_attrib Multisample;
2781    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2782    struct gl_point_attrib       Point;          /**< Point attributes */
2783    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2784    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2785    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2786    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2787    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2788    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2789    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2790    /*@}*/
2791
2792    /** \name Client attribute stack */
2793    /*@{*/
2794    GLuint ClientAttribStackDepth;
2795    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2796    /*@}*/
2797
2798    /** \name Client attribute groups */
2799    /*@{*/
2800    struct gl_array_attrib       Array;  /**< Vertex arrays */
2801    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2802    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2803    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2804    /*@}*/
2805
2806    /** \name Other assorted state (not pushed/popped on attribute stack) */
2807    /*@{*/
2808    struct gl_histogram_attrib   Histogram;
2809    struct gl_minmax_attrib      MinMax;
2810    struct gl_convolution_attrib Convolution1D;
2811    struct gl_convolution_attrib Convolution2D;
2812    struct gl_convolution_attrib Separable2D;
2813
2814    struct gl_evaluators EvalMap;   /**< All evaluators */
2815    struct gl_feedback   Feedback;  /**< Feedback */
2816    struct gl_selection  Select;    /**< Selection */
2817
2818    struct gl_color_table ColorTable;       /**< Pre-convolution */
2819    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2820    struct gl_color_table PostConvolutionColorTable;
2821    struct gl_color_table ProxyPostConvolutionColorTable;
2822    struct gl_color_table PostColorMatrixColorTable;
2823    struct gl_color_table ProxyPostColorMatrixColorTable;
2824
2825    struct gl_program_state Program;        /**< for vertex or fragment progs */
2826    struct gl_vertex_program_state VertexProgram;   /**< GL_ARB/NV_vertex_program */
2827    struct gl_fragment_program_state FragmentProgram;  /**< GL_ARB/NV_vertex_program */
2828    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
2829
2830    struct fragment_program *_TexEnvProgram;     /**< Texture state as fragment program */
2831    struct vertex_program *_TnlProgram;          /**< Fixed func TNL state as vertex program */
2832
2833    GLboolean _MaintainTnlProgram;
2834    GLboolean _MaintainTexEnvProgram;
2835    GLboolean _UseTexEnvProgram;
2836
2837    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
2838
2839    struct gl_shader_objects_state ShaderObjects;        /* GL_ARB_shader_objects */
2840    /*@}*/
2841
2842 #if FEATURE_EXT_framebuffer_object
2843    struct gl_renderbuffer *CurrentRenderbuffer;
2844 #endif
2845
2846    GLenum ErrorValue;        /**< Last error code */
2847    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2848    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
2849
2850    /** \name Derived state */
2851    /*@{*/
2852    GLbitfield _TriangleCaps;      /**< bitwise-or of DD_* flags */
2853    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2854    GLfloat _EyeZDir[3];
2855    GLfloat _ModelViewInvScale;
2856    GLboolean _NeedEyeCoords;
2857    GLboolean _ForceEyeCoords;
2858    GLenum _CurrentProgram;    /* currently executing program */
2859
2860    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2861    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2862    /**@}*/
2863
2864    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2865
2866
2867    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2868                     *
2869                     * We don't have a better way to communicate this value from
2870                     * swrast_setup to swrast. */
2871
2872    /** \name For debugging/development only */
2873    /*@{*/
2874    GLboolean FirstTimeCurrent;
2875    /*@}*/
2876
2877    /** Dither disable via MESA_NO_DITHER env var */
2878    GLboolean NoDither;
2879
2880    /** software compression/decompression supported or not */
2881    GLboolean Mesa_DXTn;
2882
2883    /** Core tnl module support */
2884    struct gl_tnl_module TnlModule;
2885
2886    /**
2887     * \name Hooks for module contexts.
2888     *
2889     * These will eventually live in the driver or elsewhere.
2890     */
2891    /*@{*/
2892    void *swrast_context;
2893    void *swsetup_context;
2894    void *swtnl_context;
2895    void *swtnl_im;
2896    void *acache_context;
2897    void *aelt_context;
2898    /*@}*/
2899 };
2900
2901
2902 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2903 extern const char *_mesa_prim_name[GL_POLYGON+4];
2904
2905
2906 #ifdef DEBUG
2907 extern int MESA_VERBOSE;
2908 extern int MESA_DEBUG_FLAGS;
2909 # define MESA_FUNCTION __FUNCTION__
2910 #else
2911 # define MESA_VERBOSE 0
2912 # define MESA_DEBUG_FLAGS 0
2913 # define MESA_FUNCTION "a function"
2914 # ifndef NDEBUG
2915 #  define NDEBUG
2916 # endif
2917 #endif
2918
2919
2920 enum _verbose
2921 {
2922    VERBOSE_VARRAY               = 0x0001,
2923    VERBOSE_TEXTURE              = 0x0002,
2924    VERBOSE_IMMEDIATE            = 0x0004,
2925    VERBOSE_PIPELINE             = 0x0008,
2926    VERBOSE_DRIVER               = 0x0010,
2927    VERBOSE_STATE                = 0x0020,
2928    VERBOSE_API                  = 0x0040,
2929    VERBOSE_DISPLAY_LIST         = 0x0100,
2930    VERBOSE_LIGHTING             = 0x0200,
2931    VERBOSE_PRIMS                = 0x0400,
2932    VERBOSE_VERTS                = 0x0800,
2933    VERBOSE_DISASSEM             = 0x1000
2934 };
2935
2936
2937 enum _debug
2938 {
2939    DEBUG_ALWAYS_FLUSH           = 0x1
2940 };
2941
2942
2943
2944 #define Elements(x) sizeof(x)/sizeof(*(x))
2945
2946
2947 #endif /* TYPES_H */