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) 1999-2005  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 /**
 324  * Data structure for color tables
 325  */
 326 struct gl_color_table
 327 {
 328    GLenum InternalFormat;      /**< The user-specified format */
 329    GLenum _BaseFormat;         /**< GL_ALPHA, GL_RGBA, GL_RGB, etc */
 330    GLuint Size;           /**< number of entries (rows) in table */
 331    GLvoid *Table;         /**< points to data of <Type> */
 332    GLenum Type;           /**< GL_UNSIGNED_BYTE or GL_FLOAT */
 333    GLubyte RedSize;
 334    GLubyte GreenSize;
 335    GLubyte BlueSize;
 336    GLubyte AlphaSize;
 337    GLubyte LuminanceSize;
 338    GLubyte IntensitySize;
 339 };
 340
 341
 342 /**
 343  * \name Bit flags used for updating material values.
 344  */
 345 /*@{*/
 346 #define MAT_ATTRIB_FRONT_AMBIENT           0
 347 #define MAT_ATTRIB_BACK_AMBIENT            1
 348 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 349 #define MAT_ATTRIB_BACK_DIFFUSE            3
 350 #define MAT_ATTRIB_FRONT_SPECULAR          4
 351 #define MAT_ATTRIB_BACK_SPECULAR           5
 352 #define MAT_ATTRIB_FRONT_EMISSION          6
 353 #define MAT_ATTRIB_BACK_EMISSION           7
 354 #define MAT_ATTRIB_FRONT_SHININESS         8
 355 #define MAT_ATTRIB_BACK_SHININESS          9
 356 #define MAT_ATTRIB_FRONT_INDEXES           10
 357 #define MAT_ATTRIB_BACK_INDEXES            11
 358 #define MAT_ATTRIB_MAX                     12
 359
 360 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 361 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 362 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 363 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 364 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 365 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 366
 367 #define MAT_INDEX_AMBIENT  0
 368 #define MAT_INDEX_DIFFUSE  1
 369 #define MAT_INDEX_SPECULAR 2
 370
 371 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 372 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 373 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 374 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 375 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 376 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 377 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 378 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 379 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 380 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 381 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 382 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 383
 384
 385 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 386                                  MAT_BIT_FRONT_AMBIENT |        \
 387                                  MAT_BIT_FRONT_DIFFUSE |        \
 388                                  MAT_BIT_FRONT_SPECULAR |       \
 389                                  MAT_BIT_FRONT_SHININESS |      \
 390                                  MAT_BIT_FRONT_INDEXES)
 391
 392 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 393                                  MAT_BIT_BACK_AMBIENT |         \
 394                                  MAT_BIT_BACK_DIFFUSE |         \
 395                                  MAT_BIT_BACK_SPECULAR |        \
 396                                  MAT_BIT_BACK_SHININESS |       \
 397                                  MAT_BIT_BACK_INDEXES)
 398
 399 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 400 /*@}*/
 401
 402
 403 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 404 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 405
 406 /**
 407  * Material shininess lookup table.
 408  */
 409 struct gl_shine_tab
 410 {
 411    struct gl_shine_tab *next, *prev;
 412    GLfloat tab[SHINE_TABLE_SIZE+1];
 413    GLfloat shininess;
 414    GLuint refcount;
 415 };
 416
 417
 418 /**
 419  * Light source state.
 420  */
 421 struct gl_light
 422 {
 423    struct gl_light *next;       /**< double linked list with sentinel */
 424    struct gl_light *prev;
 425
 426    GLfloat Ambient[4];          /**< ambient color */
 427    GLfloat Diffuse[4];          /**< diffuse color */
 428    GLfloat Specular[4];         /**< specular color */
 429    GLfloat EyePosition[4];      /**< position in eye coordinates */
 430    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 431    GLfloat SpotExponent;
 432    GLfloat SpotCutoff;          /**< in degrees */
 433    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 434    GLfloat ConstantAttenuation;
 435    GLfloat LinearAttenuation;
 436    GLfloat QuadraticAttenuation;
 437    GLboolean Enabled;           /**< On/off flag */
 438
 439    /**
 440     * \name Derived fields
 441     */
 442    /*@{*/
 443    GLbitfield _Flags;           /**< State */
 444
 445    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 446    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 447    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 448    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 449    GLfloat _VP_inf_spot_attenuation;
 450
 451    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 452    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 453    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 454    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 455    GLfloat _dli;                /**< CI diffuse light intensity */
 456    GLfloat _sli;                /**< CI specular light intensity */
 457    /*@}*/
 458 };
 459
 460
 461 /**
 462  * Light model state.
 463  */
 464 struct gl_lightmodel
 465 {
 466    GLfloat Ambient[4];          /**< ambient color */
 467    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 468    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 469    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 470                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 471 };
 472
 473
 474 /**
 475  * Material state.
 476  */
 477 struct gl_material
 478 {
 479    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 480 };
 481
 482
 483 /**
 484  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 485  */
 486 struct gl_accum_attrib
 487 {
 488    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 489 };
 490
 491
 492 /**
 493  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 494  */
 495 struct gl_colorbuffer_attrib
 496 {
 497    GLuint ClearIndex;                   /**< Index to use for glClear */
 498    GLclampf ClearColor[4];              /**< Color to use for glClear */
 499
 500    GLuint IndexMask;                    /**< Color index write mask */
 501    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 502
 503    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 504
 505    /**
 506     * \name alpha testing
 507     */
 508    /*@{*/
 509    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 510    GLenum AlphaFunc;                    /**< Alpha test function */
 511    GLclampf AlphaRef;                   /**< Alpha reference value */
 512    /*@}*/
 513
 514    /**
 515     * \name Blending
 516     */
 517    /*@{*/
 518    GLboolean BlendEnabled;              /**< Blending enabled flag */
 519    GLenum BlendSrcRGB;                  /**< Blending source operator */
 520    GLenum BlendDstRGB;                  /**< Blending destination operator */
 521    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 522    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 523    GLenum BlendEquationRGB;             /**< Blending equation */
 524    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 525    GLfloat BlendColor[4];               /**< Blending color */
 526    /*@}*/
 527
 528    /**
 529     * \name Logic op
 530     */
 531    /*@{*/
 532    GLenum LogicOp;                      /**< Logic operator */
 533    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 534    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 535    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 536    /*@}*/
 537
 538    GLboolean DitherFlag;                /**< Dither enable flag */
 539 };
 540
 541
 542 /**
 543  * Current attribute group (GL_CURRENT_BIT).
 544  */
 545 struct gl_current_attrib
 546 {
 547    /**
 548     * \name Values valid only when FLUSH_VERTICES has been called.
 549     */
 550    /*@{*/
 551    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 552                                                   *  indexed by VERT_ATTRIB_* */
 553    GLfloat Index;                               /**< Current color index */
 554    GLboolean EdgeFlag;                          /**< Current edge flag */
 555    /*@}*/
 556
 557    /**
 558     * \name Values are always valid.
 559     *
 560     * \note BTW, note how similar this set of attributes is to the SWvertex
 561     * data type in the software rasterizer...
 562     */
 563    /*@{*/
 564    GLfloat RasterPos[4];                        /**< Current raster position */
 565    GLfloat RasterDistance;                      /**< Current raster distance */
 566    GLfloat RasterColor[4];                      /**< Current raster color */
 567    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 568    GLfloat RasterIndex;                         /**< Current raster index */
 569    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 570    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 571    /*@}*/
 572 };
 573
 574
 575 /**
 576  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 577  */
 578 struct gl_depthbuffer_attrib
 579 {
 580    GLenum Func;                 /**< Function for depth buffer compare */
 581    GLclampd Clear;              /**< Value to clear depth buffer to */
 582    GLboolean Test;              /**< Depth buffering enabled flag */
 583    GLboolean Mask;              /**< Depth buffer writable? */
 584    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 585    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 586 };
 587
 588
 589 /**
 590  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
 591  */
 592 struct gl_enable_attrib
 593 {
 594    GLboolean AlphaTest;
 595    GLboolean AutoNormal;
 596    GLboolean Blend;
 597    GLbitfield ClipPlanes;
 598    GLboolean ColorMaterial;
 599    GLboolean ColorTable;                /* SGI_color_table */
 600    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 601    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 602    GLboolean Convolution1D;
 603    GLboolean Convolution2D;
 604    GLboolean Separable2D;
 605    GLboolean CullFace;
 606    GLboolean DepthTest;
 607    GLboolean Dither;
 608    GLboolean Fog;
 609    GLboolean Histogram;
 610    GLboolean Light[MAX_LIGHTS];
 611    GLboolean Lighting;
 612    GLboolean LineSmooth;
 613    GLboolean LineStipple;
 614    GLboolean IndexLogicOp;
 615    GLboolean ColorLogicOp;
 616    GLboolean Map1Color4;
 617    GLboolean Map1Index;
 618    GLboolean Map1Normal;
 619    GLboolean Map1TextureCoord1;
 620    GLboolean Map1TextureCoord2;
 621    GLboolean Map1TextureCoord3;
 622    GLboolean Map1TextureCoord4;
 623    GLboolean Map1Vertex3;
 624    GLboolean Map1Vertex4;
 625    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 626    GLboolean Map2Color4;
 627    GLboolean Map2Index;
 628    GLboolean Map2Normal;
 629    GLboolean Map2TextureCoord1;
 630    GLboolean Map2TextureCoord2;
 631    GLboolean Map2TextureCoord3;
 632    GLboolean Map2TextureCoord4;
 633    GLboolean Map2Vertex3;
 634    GLboolean Map2Vertex4;
 635    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 636    GLboolean MinMax;
 637    GLboolean Normalize;
 638    GLboolean PixelTexture;
 639    GLboolean PointSmooth;
 640    GLboolean PolygonOffsetPoint;
 641    GLboolean PolygonOffsetLine;
 642    GLboolean PolygonOffsetFill;
 643    GLboolean PolygonSmooth;
 644    GLboolean PolygonStipple;
 645    GLboolean RescaleNormals;
 646    GLboolean Scissor;
 647    GLboolean Stencil;
 648    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 649    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 650    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 651    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 652    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 653    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 654    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 655    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 656    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 657    /* SGI_texture_color_table */
 658    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 659    /* GL_NV_vertex_program */
 660    GLboolean VertexProgram;
 661    GLboolean VertexProgramPointSize;
 662    GLboolean VertexProgramTwoSide;
 663    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 664    GLboolean PointSprite;
 665    GLboolean FragmentShaderATI;
 666 };
 667
 668
 669 /**
 670  * Evaluator attribute group (GL_EVAL_BIT).
 671  */
 672 struct gl_eval_attrib
 673 {
 674    /**
 675     * \name Enable bits
 676     */
 677    /*@{*/
 678    GLboolean Map1Color4;
 679    GLboolean Map1Index;
 680    GLboolean Map1Normal;
 681    GLboolean Map1TextureCoord1;
 682    GLboolean Map1TextureCoord2;
 683    GLboolean Map1TextureCoord3;
 684    GLboolean Map1TextureCoord4;
 685    GLboolean Map1Vertex3;
 686    GLboolean Map1Vertex4;
 687    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 688    GLboolean Map2Color4;
 689    GLboolean Map2Index;
 690    GLboolean Map2Normal;
 691    GLboolean Map2TextureCoord1;
 692    GLboolean Map2TextureCoord2;
 693    GLboolean Map2TextureCoord3;
 694    GLboolean Map2TextureCoord4;
 695    GLboolean Map2Vertex3;
 696    GLboolean Map2Vertex4;
 697    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 698    GLboolean AutoNormal;
 699    /*@}*/
 700
 701    /**
 702     * \name Map Grid endpoints and divisions and calculated du values
 703     */
 704    /*@{*/
 705    GLint MapGrid1un;
 706    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 707    GLint MapGrid2un, MapGrid2vn;
 708    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 709    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 710    /*@}*/
 711 };
 712
 713
 714 /**
 715  * Fog attribute group (GL_FOG_BIT).
 716  */
 717 struct gl_fog_attrib
 718 {
 719    GLboolean Enabled;           /**< Fog enabled flag */
 720    GLfloat Color[4];            /**< Fog color */
 721    GLfloat Density;             /**< Density >= 0.0 */
 722    GLfloat Start;               /**< Start distance in eye coords */
 723    GLfloat End;                 /**< End distance in eye coords */
 724    GLfloat Index;               /**< Fog index */
 725    GLenum Mode;                 /**< Fog mode */
 726    GLboolean ColorSumEnabled;
 727    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 728 };
 729
 730
 731 /**
 732  * Hint attribute group (GL_HINT_BIT).
 733  *
 734  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 735  */
 736 struct gl_hint_attrib
 737 {
 738    GLenum PerspectiveCorrection;
 739    GLenum PointSmooth;
 740    GLenum LineSmooth;
 741    GLenum PolygonSmooth;
 742    GLenum Fog;
 743    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 744    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 745    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 746    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 747 };
 748
 749
 750 /**
 751  * Histogram attributes.
 752  */
 753 struct gl_histogram_attrib
 754 {
 755    GLuint Width;                                /**< number of table entries */
 756    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 757    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 758    GLboolean Sink;                              /**< terminate image transfer? */
 759    GLubyte RedSize;                             /**< Bits per counter */
 760    GLubyte GreenSize;
 761    GLubyte BlueSize;
 762    GLubyte AlphaSize;
 763    GLubyte LuminanceSize;
 764 };
 765
 766
 767 /**
 768  * Color Min/max state.
 769  */
 770 struct gl_minmax_attrib
 771 {
 772    GLenum Format;
 773    GLboolean Sink;
 774    GLfloat Min[4], Max[4];   /**< RGBA */
 775 };
 776
 777
 778 /**
 779  * Image convolution state.
 780  */
 781 struct gl_convolution_attrib
 782 {
 783    GLenum Format;
 784    GLenum InternalFormat;
 785    GLuint Width;
 786    GLuint Height;
 787    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 788 };
 789
 790
 791 /**
 792  * Light state flags.
 793  */
 794 /*@{*/
 795 #define LIGHT_SPOT         0x1
 796 #define LIGHT_LOCAL_VIEWER 0x2
 797 #define LIGHT_POSITIONAL   0x4
 798 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 799 /*@}*/
 800
 801
 802 /**
 803  * Lighting attribute group (GL_LIGHT_BIT).
 804  */
 805 struct gl_light_attrib
 806 {
 807    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 808    struct gl_lightmodel Model;          /**< Lighting model */
 809
 810    /**
 811     * Must flush FLUSH_VERTICES before referencing:
 812     */
 813    /*@{*/
 814    struct gl_material Material;         /**< Includes front & back values */
 815    /*@}*/
 816
 817    GLboolean Enabled;                   /**< Lighting enabled flag */
 818    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 819    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 820    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 821    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 822    GLboolean ColorMaterialEnabled;
 823
 824    struct gl_light EnabledList;         /**< List sentinel */
 825
 826    /**
 827     * Derived state for optimizations:
 828     */
 829    /*@{*/
 830    GLboolean _NeedEyeCoords;
 831    GLboolean _NeedVertices;             /**< Use fast shader? */
 832    GLbitfield  _Flags;                  /**< LIGHT_* flags, see above */
 833    GLfloat _BaseColor[2][3];
 834    /*@}*/
 835 };
 836
 837
 838 /**
 839  * Line attribute group (GL_LINE_BIT).
 840  */
 841 struct gl_line_attrib
 842 {
 843    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 844    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 845    GLushort StipplePattern;     /**< Stipple pattern */
 846    GLint StippleFactor;         /**< Stipple repeat factor */
 847    GLfloat Width;               /**< Line width */
 848    GLfloat _Width;              /**< Clamped Line width */
 849 };
 850
 851
 852 /**
 853  * Display list attribute group (GL_LIST_BIT).
 854  */
 855 struct gl_list_attrib
 856 {
 857    GLuint ListBase;
 858 };
 859
 860
 861 /**
 862  * Used by device drivers to hook new commands into display lists.
 863  */
 864 struct gl_list_instruction
 865 {
 866    GLuint Size;
 867    void (*Execute)( GLcontext *ctx, void *data );
 868    void (*Destroy)( GLcontext *ctx, void *data );
 869    void (*Print)( GLcontext *ctx, void *data );
 870 };
 871
 872 #define MAX_DLIST_EXT_OPCODES 16
 873
 874 /**
 875  * Used by device drivers to hook new commands into display lists.
 876  */
 877 struct gl_list_extensions
 878 {
 879    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 880    GLuint NumOpcodes;
 881 };
 882
 883
 884 /**
 885  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 886  */
 887 struct gl_multisample_attrib
 888 {
 889    GLboolean Enabled;
 890    GLboolean SampleAlphaToCoverage;
 891    GLboolean SampleAlphaToOne;
 892    GLboolean SampleCoverage;
 893    GLfloat SampleCoverageValue;
 894    GLboolean SampleCoverageInvert;
 895 };
 896
 897
 898 /**
 899  * Pixel attribute group (GL_PIXEL_MODE_BIT).
 900  */
 901 struct gl_pixel_attrib
 902 {
 903    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
 904    GLfloat RedBias, RedScale;
 905    GLfloat GreenBias, GreenScale;
 906    GLfloat BlueBias, BlueScale;
 907    GLfloat AlphaBias, AlphaScale;
 908    GLfloat DepthBias, DepthScale;
 909    GLint IndexShift, IndexOffset;
 910    GLboolean MapColorFlag;
 911    GLboolean MapStencilFlag;
 912    GLfloat ZoomX, ZoomY;
 913    /* XXX move these out of gl_pixel_attrib */
 914    GLint MapStoSsize;           /**< Size of each pixel map */
 915    GLint MapItoIsize;
 916    GLint MapItoRsize;
 917    GLint MapItoGsize;
 918    GLint MapItoBsize;
 919    GLint MapItoAsize;
 920    GLint MapRtoRsize;
 921    GLint MapGtoGsize;
 922    GLint MapBtoBsize;
 923    GLint MapAtoAsize;
 924    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 925    GLfloat MapItoI[MAX_PIXEL_MAP_TABLE];
 926    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 927    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 928    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 929    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 930    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 931    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 932    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 933    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 934    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 935    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 936    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 937    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 938    /** GL_EXT_histogram */
 939    GLboolean HistogramEnabled;
 940    GLboolean MinMaxEnabled;
 941    /** GL_SGIS_pixel_texture */
 942    GLboolean PixelTextureEnabled;
 943    GLenum FragmentRgbSource;
 944    GLenum FragmentAlphaSource;
 945    /** GL_SGI_color_matrix */
 946    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 947    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 948    /** GL_SGI_color_table */
 949    GLfloat ColorTableScale[4];
 950    GLfloat ColorTableBias[4];
 951    GLboolean ColorTableEnabled;
 952    GLfloat PCCTscale[4];
 953    GLfloat PCCTbias[4];
 954    GLboolean PostConvolutionColorTableEnabled;
 955    GLfloat PCMCTscale[4];
 956    GLfloat PCMCTbias[4];
 957    GLboolean PostColorMatrixColorTableEnabled;
 958    /** GL_SGI_texture_color_table */
 959    GLfloat TextureColorTableScale[4];
 960    GLfloat TextureColorTableBias[4];
 961    /** Convolution */
 962    GLboolean Convolution1DEnabled;
 963    GLboolean Convolution2DEnabled;
 964    GLboolean Separable2DEnabled;
 965    GLfloat ConvolutionBorderColor[3][4];
 966    GLenum ConvolutionBorderMode[3];
 967    GLfloat ConvolutionFilterScale[3][4];
 968    GLfloat ConvolutionFilterBias[3][4];
 969    GLfloat PostConvolutionScale[4];  /**< RGBA */
 970    GLfloat PostConvolutionBias[4];   /**< RGBA */
 971 };
 972
 973
 974 /**
 975  * Point attribute group (GL_POINT_BIT).
 976  */
 977 struct gl_point_attrib
 978 {
 979    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 980    GLfloat Size;                /**< User-specified point size */
 981    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
 982    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 983    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 984    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 985    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 986    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
 987    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV/ARB_point_sprite */
 988    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 989    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
 990 };
 991
 992
 993 /**
 994  * Polygon attribute group (GL_POLYGON_BIT).
 995  */
 996 struct gl_polygon_attrib
 997 {
 998    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
 999    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1000    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1001    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1002    GLboolean CullFlag;          /**< Culling on/off flag */
1003    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1004    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1005    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1006    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1007    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1008    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1009    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1010    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1011 };
1012
1013
1014 /**
1015  * Scissor attributes (GL_SCISSOR_BIT).
1016  */
1017 struct gl_scissor_attrib
1018 {
1019    GLboolean Enabled;           /**< Scissor test enabled? */
1020    GLint X, Y;                  /**< Lower left corner of box */
1021    GLsizei Width, Height;       /**< Size of box */
1022 };
1023
1024
1025 /**
1026  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1027  */
1028 struct gl_stencil_attrib
1029 {
1030    GLboolean Enabled;           /**< Enabled flag */
1031    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1032    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1033    GLboolean _TestTwoSide;
1034    GLenum Function[2];          /**< Stencil function */
1035    GLenum FailFunc[2];          /**< Fail function */
1036    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1037    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1038    GLint Ref[2];                /**< Reference value */
1039    GLuint ValueMask[2];         /**< Value mask */
1040    GLuint WriteMask[2];         /**< Write mask */
1041    GLuint Clear;                /**< Clear value */
1042 };
1043
1044
1045 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
1046
1047 /**
1048  * An index for each type of texture object
1049  */
1050 /*@{*/
1051 #define TEXTURE_1D_INDEX    0
1052 #define TEXTURE_2D_INDEX    1
1053 #define TEXTURE_3D_INDEX    2
1054 #define TEXTURE_CUBE_INDEX  3
1055 #define TEXTURE_RECT_INDEX  4
1056 /*@}*/
1057
1058 /**
1059  * Bit flags for each type of texture object
1060  * Used for Texture.Unit[]._ReallyEnabled flags.
1061  */
1062 /*@{*/
1063 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
1064 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
1065 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
1066 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
1067 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
1068 /*@}*/
1069
1070
1071 /**
1072  * TexGenEnabled flags.
1073  */
1074 /*@{*/
1075 #define S_BIT 1
1076 #define T_BIT 2
1077 #define R_BIT 4
1078 #define Q_BIT 8
1079 /*@}*/
1080
1081
1082 /**
1083  * Bit flag versions of the corresponding GL_ constants.
1084  */
1085 /*@{*/
1086 #define TEXGEN_SPHERE_MAP        0x1
1087 #define TEXGEN_OBJ_LINEAR        0x2
1088 #define TEXGEN_EYE_LINEAR        0x4
1089 #define TEXGEN_REFLECTION_MAP_NV 0x8
1090 #define TEXGEN_NORMAL_MAP_NV     0x10
1091
1092 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1093                                   TEXGEN_REFLECTION_MAP_NV | \
1094                                   TEXGEN_NORMAL_MAP_NV)
1095 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1096                                   TEXGEN_REFLECTION_MAP_NV | \
1097                                   TEXGEN_NORMAL_MAP_NV     | \
1098                                   TEXGEN_EYE_LINEAR)
1099 /*@}*/
1100
1101
1102 /* A selection of state flags to make driver and module's lives easier. */
1103 #define ENABLE_TEXGEN0        0x1
1104 #define ENABLE_TEXGEN1        0x2
1105 #define ENABLE_TEXGEN2        0x4
1106 #define ENABLE_TEXGEN3        0x8
1107 #define ENABLE_TEXGEN4        0x10
1108 #define ENABLE_TEXGEN5        0x20
1109 #define ENABLE_TEXGEN6        0x40
1110 #define ENABLE_TEXGEN7        0x80
1111
1112 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1113 #define ENABLE_TEXMAT1        0x2
1114 #define ENABLE_TEXMAT2        0x4
1115 #define ENABLE_TEXMAT3        0x8
1116 #define ENABLE_TEXMAT4        0x10
1117 #define ENABLE_TEXMAT5        0x20
1118 #define ENABLE_TEXMAT6        0x40
1119 #define ENABLE_TEXMAT7        0x80
1120
1121 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1122 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1123
1124
1125 /**
1126  * Texel fetch function prototype.  We use texel fetch functions to
1127  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1128  * texture images.  These functions help to isolate us from the gritty
1129  * details of all the various texture image encodings.
1130  *
1131  * \param texImage texture image.
1132  * \param col texel column.
1133  * \param row texel row.
1134  * \param img texel image level/layer.
1135  * \param texelOut output texel (up to 4 GLchans)
1136  */
1137 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1138                                  GLint col, GLint row, GLint img,
1139                                  GLchan *texelOut );
1140
1141 /**
1142  * As above, but returns floats.
1143  * Used for depth component images and for upcoming signed/float
1144  * texture images.
1145  */
1146 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1147                                  GLint col, GLint row, GLint img,
1148                                  GLfloat *texelOut );
1149
1150
1151 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1152                                GLint col, GLint row, GLint img,
1153                                const void *texel);
1154
1155 /**
1156  * TexImage store function.  This is called by the glTex[Sub]Image
1157  * functions and is responsible for converting the user-specified texture
1158  * image into a specific (hardware) image format.
1159  */
1160 typedef GLboolean (*StoreTexImageFunc)(GLcontext *ctx, GLuint dims,
1161                           GLenum baseInternalFormat,
1162                           const struct gl_texture_format *dstFormat,
1163                           GLvoid *dstAddr,
1164                           GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
1165                           GLint dstRowStride, GLint dstImageStride,
1166                           GLint srcWidth, GLint srcHeight, GLint srcDepth,
1167                           GLenum srcFormat, GLenum srcType,
1168                           const GLvoid *srcAddr,
1169                           const struct gl_pixelstore_attrib *srcPacking);
1170
1171
1172
1173 /**
1174  * Texture format record
1175  */
1176 struct gl_texture_format
1177 {
1178    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1179
1180    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1181                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1182                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1183                                  *   GL_DEPTH_COMPONENT.
1184                                  */
1185    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1186    GLubyte RedBits;             /**< Bits per texel component */
1187    GLubyte GreenBits;           /**< These are just rough approximations for */
1188    GLubyte BlueBits;            /**< compressed texture formats. */
1189    GLubyte AlphaBits;
1190    GLubyte LuminanceBits;
1191    GLubyte IntensityBits;
1192    GLubyte IndexBits;
1193    GLubyte DepthBits;
1194    GLubyte StencilBits;         /**< GL_EXT_packed_depth_stencil */
1195
1196    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1197
1198    StoreTexImageFunc StoreImage;
1199
1200    /**
1201     * \name Texel fetch function pointers
1202     */
1203    /*@{*/
1204    FetchTexelFuncC FetchTexel1D;
1205    FetchTexelFuncC FetchTexel2D;
1206    FetchTexelFuncC FetchTexel3D;
1207    FetchTexelFuncF FetchTexel1Df;
1208    FetchTexelFuncF FetchTexel2Df;
1209    FetchTexelFuncF FetchTexel3Df;
1210    /*@}*/
1211
1212    StoreTexelFunc StoreTexel;
1213 };
1214
1215
1216 /**
1217  * Texture image state.  Describes the dimensions of a texture image,
1218  * the texel format and pointers to Texel Fetch functions.
1219  */
1220 struct gl_texture_image
1221 {
1222    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1223                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1224                                  *   GL_INTENSITY, GL_COLOR_INDEX,
1225                                  *   GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT
1226                                  *   only. Used for choosing TexEnv arithmetic.
1227                                  */
1228    GLint InternalFormat;        /**< Internal format as given by the user */
1229    GLuint Border;               /**< 0 or 1 */
1230    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1231    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1232    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1233    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1234    GLuint Width2;               /**< = Width - 2*Border */
1235    GLuint Height2;              /**< = Height - 2*Border */
1236    GLuint Depth2;               /**< = Depth - 2*Border */
1237    GLuint WidthLog2;            /**< = log2(Width2) */
1238    GLuint HeightLog2;           /**< = log2(Height2) */
1239    GLuint DepthLog2;            /**< = log2(Depth2) */
1240    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1241    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1242    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1243    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1244    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1245    GLboolean IsClientData;      /**< Data owned by client? */
1246    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1247
1248    const struct gl_texture_format *TexFormat;
1249
1250    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1251
1252    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1253    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1254
1255    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1256    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1257
1258    /**
1259     * \name For device driver:
1260     */
1261    /*@{*/
1262    void *DriverData;            /**< Arbitrary device driver data */
1263    /*@}*/
1264 };
1265
1266
1267 /**
1268  * Indexes for cube map faces.
1269  */
1270 /*@{*/
1271 #define FACE_POS_X   0
1272 #define FACE_NEG_X   1
1273 #define FACE_POS_Y   2
1274 #define FACE_NEG_Y   3
1275 #define FACE_POS_Z   4
1276 #define FACE_NEG_Z   5
1277 #define MAX_FACES  6
1278 /*@}*/
1279
1280
1281 /**
1282  * Texture object state.  Contains the array of mipmap images, border color,
1283  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1284  * color palette.
1285  */
1286 struct gl_texture_object
1287 {
1288    _glthread_Mutex Mutex;       /**< for thread safety */
1289    GLint RefCount;              /**< reference count */
1290    GLuint Name;                 /**< the user-visible texture object ID */
1291    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1292    GLfloat Priority;            /**< in [0,1] */
1293    GLfloat BorderColor[4];      /**< unclamped */
1294    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1295    GLenum WrapS;                /**< S-axis texture image wrap mode */
1296    GLenum WrapT;                /**< T-axis texture image wrap mode */
1297    GLenum WrapR;                /**< R-axis texture image wrap mode */
1298    GLenum MinFilter;            /**< minification filter */
1299    GLenum MagFilter;            /**< magnification filter */
1300    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1301    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1302    GLfloat LodBias;             /**< OpenGL 1.4 */
1303    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1304    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1305    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1306    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1307    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1308    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1309    GLenum CompareMode;          /**< GL_ARB_shadow */
1310    GLenum CompareFunc;          /**< GL_ARB_shadow */
1311    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1312    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1313    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1314    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1315    GLboolean Complete;          /**< Is texture object complete? */
1316
1317    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1318    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1319
1320    /** GL_EXT_paletted_texture */
1321    struct gl_color_table Palette;
1322
1323
1324    /**
1325     * \name For device driver.
1326     * Note: instead of attaching driver data to this pointer, it's preferable
1327     * to instead use this struct as a base class for your own texture object
1328     * class.  Driver->NewTextureObject() can be used to implement the
1329     * allocation.
1330     */
1331    void *DriverData;    /**< Arbitrary device driver data */
1332 };
1333
1334
1335 /**
1336  * Texture combine environment state.
1337  *
1338  * \todo
1339  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1340  * structure will need to be expanded for 4 elements.
1341  */
1342 struct gl_tex_env_combine_state
1343 {
1344    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1345    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1346    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1347    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1348    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1349    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1350    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1351    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1352    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1353    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1354 };
1355
1356
1357 /**
1358  * Texture unit state.  Contains enable flags, texture environment/function/
1359  * combiners, texgen state, pointers to current texture objects and
1360  * post-filter color tables.
1361  */
1362 struct gl_texture_unit
1363 {
1364    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1365    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1366
1367    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1368    GLfloat EnvColor[4];
1369    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1370    /** \name Tex coord generation mode
1371     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1372    /*@{*/
1373    GLenum GenModeS;
1374    GLenum GenModeT;
1375    GLenum GenModeR;
1376    GLenum GenModeQ;
1377    /*@}*/
1378    GLbitfield _GenBitS;
1379    GLbitfield _GenBitT;
1380    GLbitfield _GenBitR;
1381    GLbitfield _GenBitQ;
1382    GLbitfield _GenFlags;        /**< bitwise or of GenBit[STRQ] */
1383    GLfloat ObjectPlaneS[4];
1384    GLfloat ObjectPlaneT[4];
1385    GLfloat ObjectPlaneR[4];
1386    GLfloat ObjectPlaneQ[4];
1387    GLfloat EyePlaneS[4];
1388    GLfloat EyePlaneT[4];
1389    GLfloat EyePlaneR[4];
1390    GLfloat EyePlaneQ[4];
1391    GLfloat LodBias;             /**< for biasing mipmap levels */
1392
1393    /**
1394     * \name GL_EXT_texture_env_combine
1395     */
1396    struct gl_tex_env_combine_state Combine;
1397
1398    /**
1399     * Derived state based on \c EnvMode and the \c BaseFormat of the
1400     * currently enabled texture.
1401     */
1402    struct gl_tex_env_combine_state _EnvMode;
1403
1404    /**
1405     * Currently enabled combiner state.  This will point to either
1406     * \c Combine or \c _EnvMode.
1407     */
1408    struct gl_tex_env_combine_state *_CurrentCombine;
1409
1410    struct gl_texture_object *Current1D;
1411    struct gl_texture_object *Current2D;
1412    struct gl_texture_object *Current3D;
1413    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1414    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1415
1416    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1417
1418    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1419    struct gl_texture_object Saved2D;
1420    struct gl_texture_object Saved3D;
1421    struct gl_texture_object SavedCubeMap;
1422    struct gl_texture_object SavedRect;
1423
1424    /* GL_SGI_texture_color_table */
1425    struct gl_color_table ColorTable;
1426    struct gl_color_table ProxyColorTable;
1427    GLboolean ColorTableEnabled;
1428 };
1429
1430 struct texenvprog_cache {
1431    GLuint hash;
1432    void *key;
1433    void *data;
1434    struct texenvprog_cache *next;
1435 };
1436
1437 /**
1438  * Texture attribute group (GL_TEXTURE_BIT).
1439  */
1440 struct gl_texture_attrib
1441 {
1442    /**
1443     * name multitexture
1444     */
1445    /**@{*/
1446    GLuint CurrentUnit;         /**< Active texture unit */
1447    GLbitfield _EnabledUnits;  /**< one bit set for each really-enabled unit */
1448    GLbitfield _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1449    GLbitfield _GenFlags;            /**< for texgen */
1450    GLbitfield _TexGenEnabled;
1451    GLbitfield _TexMatEnabled;
1452    /**@}*/
1453
1454    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1455
1456    struct gl_texture_object *Proxy1D;
1457    struct gl_texture_object *Proxy2D;
1458    struct gl_texture_object *Proxy3D;
1459    struct gl_texture_object *ProxyCubeMap;
1460    struct gl_texture_object *ProxyRect;
1461
1462    /** GL_EXT_shared_texture_palette */
1463    GLboolean SharedPalette;
1464    struct gl_color_table Palette;
1465
1466    /** Cached texenv fragment programs */
1467    struct texenvprog_cache *env_fp_cache;
1468 };
1469
1470
1471 /**
1472  * Transformation attribute group (GL_TRANSFORM_BIT).
1473  */
1474 struct gl_transform_attrib
1475 {
1476    GLenum MatrixMode;                           /**< Matrix mode */
1477    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1478    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1479    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1480    GLboolean Normalize;                         /**< Normalize all normals? */
1481    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1482    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1483
1484    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1485    GLfloat CullEyePos[4];
1486    GLfloat CullObjPos[4];
1487 };
1488
1489
1490 /**
1491  * Viewport attribute group (GL_VIEWPORT_BIT).
1492  */
1493 struct gl_viewport_attrib
1494 {
1495    GLint X, Y;                  /**< position */
1496    GLsizei Width, Height;       /**< size */
1497    GLfloat Near, Far;           /**< Depth buffer range */
1498    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1499 };
1500
1501
1502 /**
1503  * Node for the attribute stack.
1504  */
1505 struct gl_attrib_node
1506 {
1507    GLbitfield kind;
1508    void *data;
1509    struct gl_attrib_node *next;
1510 };
1511
1512
1513 /**
1514  * GL_ARB_vertex/pixel_buffer_object buffer object
1515  */
1516 struct gl_buffer_object
1517 {
1518    GLint RefCount;
1519    GLuint Name;
1520    GLenum Usage;
1521    GLenum Access;
1522    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1523    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1524    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1525    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1526 };
1527
1528
1529
1530 /**
1531  * Client pixel packing/unpacking attributes
1532  */
1533 struct gl_pixelstore_attrib
1534 {
1535    GLint Alignment;
1536    GLint RowLength;
1537    GLint SkipPixels;
1538    GLint SkipRows;
1539    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1540    GLint SkipImages;      /**< for GL_EXT_texture3D */
1541    GLboolean SwapBytes;
1542    GLboolean LsbFirst;
1543    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1544    GLboolean Invert;        /**< GL_MESA_pack_invert */
1545    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1546 };
1547
1548
1549 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1550
1551
1552 /**
1553  * Client vertex array attributes
1554  */
1555 struct gl_client_array
1556 {
1557    GLint Size;                  /**< components per element (1,2,3,4) */
1558    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1559    GLsizei Stride;              /**< user-specified stride */
1560    GLsizei StrideB;             /**< actual stride in bytes */
1561    const GLubyte *Ptr;          /**< Points to array data */
1562    GLbitfield Enabled;          /**< one of the _NEW_ARRAY_ bits */
1563    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1564
1565    /**< GL_ARB_vertex_buffer_object */
1566    struct gl_buffer_object *BufferObj;
1567    GLuint _MaxElement;
1568
1569    GLbitfield Flags;
1570 };
1571
1572
1573 /**
1574  * Vertex array state
1575  */
1576 struct gl_array_attrib
1577 {
1578    struct gl_client_array Vertex;            /**< client data descriptors */
1579    struct gl_client_array Normal;
1580    struct gl_client_array Color;
1581    struct gl_client_array SecondaryColor;
1582    struct gl_client_array FogCoord;
1583    struct gl_client_array Index;
1584    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1585    struct gl_client_array EdgeFlag;
1586
1587    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1588
1589    GLint ActiveTexture;         /**< Client Active Texture */
1590    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1591    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1592
1593    GLbitfield _Enabled;         /**< _NEW_ARRAY_* - bit set if array enabled */
1594    GLbitfield NewState;         /**< _NEW_ARRAY_* */
1595
1596 #if FEATURE_ARB_vertex_buffer_object
1597    struct gl_buffer_object *NullBufferObj;
1598    struct gl_buffer_object *ArrayBufferObj;
1599    struct gl_buffer_object *ElementArrayBufferObj;
1600 #endif
1601    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1602 };
1603
1604
1605 /**
1606  * Feedback buffer state
1607  */
1608 struct gl_feedback
1609 {
1610    GLenum Type;
1611    GLbitfield _Mask;            /* FB_* bits */
1612    GLfloat *Buffer;
1613    GLuint BufferSize;
1614    GLuint Count;
1615 };
1616
1617
1618 /**
1619  * Selection buffer state
1620  */
1621 struct gl_selection
1622 {
1623    GLuint *Buffer;      /**< selection buffer */
1624    GLuint BufferSize;   /**< size of the selection buffer */
1625    GLuint BufferCount;  /**< number of values in the selection buffer */
1626    GLuint Hits;         /**< number of records in the selection buffer */
1627    GLuint NameStackDepth; /**< name stack depth */
1628    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1629    GLboolean HitFlag;   /**< hit flag */
1630    GLfloat HitMinZ;     /**< minimum hit depth */
1631    GLfloat HitMaxZ;     /**< maximum hit depth */
1632 };
1633
1634
1635 /**
1636  * 1-D Evaluator control points
1637  */
1638 struct gl_1d_map
1639 {
1640    GLuint Order;        /**< Number of control points */
1641    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1642    GLfloat *Points;     /**< Points to contiguous control points */
1643 };
1644
1645
1646 /**
1647  * 2-D Evaluator control points
1648  */
1649 struct gl_2d_map
1650 {
1651    GLuint Uorder;               /**< Number of control points in U dimension */
1652    GLuint Vorder;               /**< Number of control points in V dimension */
1653    GLfloat u1, u2, du;
1654    GLfloat v1, v2, dv;
1655    GLfloat *Points;             /**< Points to contiguous control points */
1656 };
1657
1658
1659 /**
1660  * All evaluator control point state
1661  */
1662 struct gl_evaluators
1663 {
1664    /**
1665     * \name 1-D maps
1666     */
1667    /*@{*/
1668    struct gl_1d_map Map1Vertex3;
1669    struct gl_1d_map Map1Vertex4;
1670    struct gl_1d_map Map1Index;
1671    struct gl_1d_map Map1Color4;
1672    struct gl_1d_map Map1Normal;
1673    struct gl_1d_map Map1Texture1;
1674    struct gl_1d_map Map1Texture2;
1675    struct gl_1d_map Map1Texture3;
1676    struct gl_1d_map Map1Texture4;
1677    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1678    /*@}*/
1679
1680    /**
1681     * \name 2-D maps
1682     */
1683    /*@{*/
1684    struct gl_2d_map Map2Vertex3;
1685    struct gl_2d_map Map2Vertex4;
1686    struct gl_2d_map Map2Index;
1687    struct gl_2d_map Map2Color4;
1688    struct gl_2d_map Map2Normal;
1689    struct gl_2d_map Map2Texture1;
1690    struct gl_2d_map Map2Texture2;
1691    struct gl_2d_map Map2Texture3;
1692    struct gl_2d_map Map2Texture4;
1693    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1694    /*@}*/
1695 };
1696
1697
1698 /**
1699  * NV_fragment_program runtime state
1700  */
1701 struct fp_machine
1702 {
1703    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1704    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1705    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1706    GLuint CondCodes[4];
1707 };
1708
1709 /**
1710  * ATI_fragment_shader runtime state
1711  */
1712 #define ATI_FS_INPUT_PRIMARY 0
1713 #define ATI_FS_INPUT_SECONDARY 1
1714
1715 /* 6 register sets - 2 inputs (primary, secondary) */
1716 struct atifs_machine
1717 {
1718    GLfloat Registers[6][4];
1719    GLfloat PrevPassRegisters[6][4];
1720    GLfloat Inputs[2][4];
1721    GLuint pass;
1722 };
1723
1724
1725 /**
1726  * Names of the various vertex/fragment program register files, etc.
1727  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1728  * All values should fit in a 4-bit field.
1729  */
1730 enum register_file
1731 {
1732    PROGRAM_TEMPORARY = 0,
1733    PROGRAM_LOCAL_PARAM = 1,
1734    PROGRAM_ENV_PARAM = 2,
1735    PROGRAM_STATE_VAR = 3,
1736    PROGRAM_INPUT = 4,
1737    PROGRAM_OUTPUT = 5,
1738    PROGRAM_NAMED_PARAM = 6,
1739    PROGRAM_CONSTANT = 7,
1740    PROGRAM_WRITE_ONLY = 8,
1741    PROGRAM_ADDRESS = 9,
1742    PROGRAM_UNDEFINED = 15  /* invalid value */
1743 };
1744
1745
1746 /** Vertex and fragment instructions */
1747 struct prog_instruction;
1748 struct atifs_instruction;
1749 struct atifs_setupinst;
1750 struct program_parameter_list;
1751
1752
1753 /**
1754  * Base class for any kind of program object
1755  */
1756 struct program
1757 {
1758    GLuint Id;
1759    GLubyte *String;          /**< Null-terminated program text */
1760    GLint RefCount;
1761    GLenum Target;
1762    GLenum Format;            /**< String encoding format */
1763    GLboolean Resident;
1764
1765    struct prog_instruction *Instructions;
1766
1767    GLbitfield InputsRead;     /* Bitmask of which input regs are read */
1768    GLbitfield OutputsWritten; /* Bitmask of which output regs are written to */
1769
1770    /** Named parameters, constants, etc. from program text */
1771    struct program_parameter_list *Parameters;
1772    /** Numbered local parameters */
1773    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1774
1775    /** Logical counts */
1776    /*@{*/
1777    GLuint NumInstructions;
1778    GLuint NumTemporaries;
1779    GLuint NumParameters;
1780    GLuint NumAttributes;
1781    GLuint NumAddressRegs;
1782    /*@}*/
1783    /** Native, actual h/w counts */
1784    /*@{*/
1785    GLuint NumNativeInstructions;
1786    GLuint NumNativeTemporaries;
1787    GLuint NumNativeParameters;
1788    GLuint NumNativeAttributes;
1789    GLuint NumNativeAddressRegs;
1790    /*@}*/
1791 };
1792
1793
1794 /** Vertex program object */
1795 struct vertex_program
1796 {
1797    struct program Base;   /* base class */
1798    GLboolean IsNVProgram; /* GL_NV_vertex_program ? */
1799    GLboolean IsPositionInvariant;  /* GL_NV_vertex_program1_1 */
1800    void *TnlData;               /* should probably use Base.DriverData */
1801 };
1802
1803
1804 /** Fragment program object */
1805 struct fragment_program
1806 {
1807    struct program Base;   /**< base class */
1808    GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1809    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1810    GLuint NumTexInstructions;
1811    GLuint NumTexIndirections;
1812    GLuint NumNativeAluInstructions; /**< GL_ARB_fragment_program */
1813    GLuint NumNativeTexInstructions;
1814    GLuint NumNativeTexIndirections;
1815    GLenum FogOption;
1816    GLboolean UsesKill;
1817 };
1818
1819 struct ati_fragment_shader
1820 {
1821    struct program Base;
1822    struct atifs_instruction *Instructions[2];
1823    struct atifs_setupinst *SetupInst[2];
1824    GLfloat Constants[8][4];
1825    GLuint localConstDef;
1826    GLubyte numArithInstr[2];
1827    GLubyte regsAssigned[2];
1828    GLubyte NumPasses;
1829    GLubyte cur_pass;
1830    GLubyte last_optype;
1831    GLboolean interpinp1;
1832    GLboolean isValid;
1833    GLuint swizzlerq;
1834 };
1835
1836 /**
1837  * State common to vertex and fragment programs.
1838  */
1839 struct gl_program_state
1840 {
1841    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_NV */
1842    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_NV */
1843 };
1844
1845
1846 /**
1847  * State vars for GL_ARB/GL_NV_vertex_program
1848  */
1849 struct gl_vertex_program_state
1850 {
1851    GLboolean Enabled;                  /**< GL_VERTEX_PROGRAM_NV */
1852    GLboolean _Enabled;                 /**< Really enabled? */
1853    GLboolean PointSizeEnabled;         /**< GL_VERTEX_PROGRAM_POINT_SIZE_NV */
1854    GLboolean TwoSideEnabled;           /**< GL_VERTEX_PROGRAM_TWO_SIDE_NV */
1855    struct vertex_program *Current;     /**< ptr to currently bound program */
1856    struct vertex_program *_Current;    /**< ptr to currently bound
1857                                            program, including internal
1858                                            (t_vp_build.c) programs */
1859
1860    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1861    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1862
1863    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1864    /* Only used during program execution (may be moved someday): */
1865    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1866    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1867    GLuint InputsSize[MAX_NV_VERTEX_PROGRAM_INPUTS];
1868    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1869    GLint AddressReg[4];
1870
1871 #if FEATURE_MESA_program_debug
1872    GLprogramcallbackMESA Callback;
1873    GLvoid *CallbackData;
1874    GLboolean CallbackEnabled;
1875    GLuint CurrentPosition;
1876 #endif
1877 };
1878
1879
1880 /**
1881  * State for GL_ARB/NV_fragment_program
1882  */
1883 struct gl_fragment_program_state
1884 {
1885    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1886    GLboolean _Enabled;                   /* Really enabled? */
1887    GLboolean _Active;                    /* Really really enabled? */
1888    struct fragment_program *Current;     /* ptr to currently bound program */
1889    struct fragment_program *_Current;    /* ptr to currently active program
1890                                             (including internal programs) */
1891    struct fp_machine Machine;            /* machine state */
1892    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1893
1894 #if FEATURE_MESA_program_debug
1895    GLprogramcallbackMESA Callback;
1896    GLvoid *CallbackData;
1897    GLboolean CallbackEnabled;
1898    GLuint CurrentPosition;
1899 #endif
1900 };
1901
1902
1903 /**
1904  * State for GL_ATI_fragment_shader
1905  */
1906 struct gl_ati_fragment_shader_state
1907 {
1908    GLboolean Enabled;
1909    GLboolean _Enabled;
1910    GLboolean Compiling;
1911    GLfloat globalConstants[8][4];
1912    struct atifs_machine Machine;            /* machine state */
1913    struct ati_fragment_shader *Current;
1914 };
1915
1916
1917 struct gl_query_object
1918 {
1919    GLuint Id;
1920    GLuint Result;      /* the counter */
1921    GLboolean Active;   /* inside Begin/EndQuery */
1922    GLboolean Ready;    /* result is ready */
1923 };
1924
1925
1926 struct gl_query_state
1927 {
1928    struct _mesa_HashTable *QueryObjects;
1929    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
1930    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
1931 };
1932
1933
1934 /**
1935  ** XXX do these gl2 structs really neeed to be here?
1936  **/
1937
1938 /**
1939  * gl2 unique interface identifier.
1940  * Each gl2 interface has its own interface id used for object queries.
1941  */
1942 enum gl2_uiid
1943 {
1944    UIID_UNKNOWN,                /* supported by all objects */
1945    UIID_GENERIC,                /* generic object */
1946    UIID_CONTAINER,              /* contains generic objects */
1947    UIID_SHADER,                 /* shader object */
1948    UIID_FRAGMENT_SHADER,        /* fragment shader */
1949    UIID_VERTEX_SHADER,          /* vertex shader */
1950    UIID_PROGRAM,                /* program object */
1951    UIID_3DLABS_SHHANDLE         /* encapsulates 3dlabs' ShHandle */
1952 };
1953
1954 struct gl2_unknown_intf
1955 {
1956    GLvoid (* AddRef) (struct gl2_unknown_intf **);
1957    GLvoid (* Release) (struct gl2_unknown_intf **);
1958    struct gl2_unknown_intf **(* QueryInterface) (struct gl2_unknown_intf **, enum gl2_uiid uiid);
1959 };
1960
1961 struct gl2_generic_intf
1962 {
1963    struct gl2_unknown_intf _unknown;
1964    GLvoid (* Delete) (struct gl2_generic_intf **);
1965    GLenum (* GetType) (struct gl2_generic_intf **);
1966    GLhandleARB (* GetName) (struct gl2_generic_intf **);
1967    GLboolean (* GetDeleteStatus) (struct gl2_generic_intf **);
1968    const GLcharARB *(* GetInfoLog) (struct gl2_generic_intf **);
1969 };
1970
1971 struct gl2_container_intf
1972 {
1973    struct gl2_generic_intf _generic;
1974    GLboolean (* Attach) (struct gl2_container_intf **, struct gl2_generic_intf **);
1975    GLboolean (* Detach) (struct gl2_container_intf **, struct gl2_generic_intf **);
1976    GLsizei (* GetAttachedCount) (struct gl2_container_intf **);
1977    struct gl2_generic_intf **(* GetAttached) (struct gl2_container_intf **, GLuint);
1978 };
1979
1980 struct gl2_shader_intf
1981 {
1982    struct gl2_generic_intf _generic;
1983    GLenum (* GetSubType) (struct gl2_shader_intf **);
1984    GLboolean (* GetCompileStatus) (struct gl2_shader_intf **);
1985    GLvoid (* SetSource) (struct gl2_shader_intf **, GLcharARB *, GLint *, GLsizei);
1986    const GLcharARB *(* GetSource) (struct gl2_shader_intf **);
1987    GLvoid (* Compile) (struct gl2_shader_intf **);
1988 };
1989
1990 struct gl2_program_intf
1991 {
1992    struct gl2_container_intf _container;
1993    GLboolean (* GetLinkStatus) (struct gl2_program_intf **);
1994    GLboolean (* GetValidateStatus) (struct gl2_program_intf **);
1995    GLvoid (* Link) (struct gl2_program_intf **);
1996    GLvoid (* Validate) (struct gl2_program_intf **);
1997 };
1998
1999 struct gl2_fragment_shader_intf
2000 {
2001    struct gl2_shader_intf _shader;
2002 };
2003
2004 struct gl2_vertex_shader_intf
2005 {
2006    struct gl2_shader_intf _shader;
2007 };
2008
2009 struct gl2_3dlabs_shhandle_intf
2010 {
2011    struct gl2_unknown_intf _unknown;
2012    GLvoid *(* GetShHandle) (struct gl2_3dlabs_shhandle_intf **);
2013 };
2014
2015 struct gl_shader_objects_state
2016 {
2017    struct gl2_program_intf **current_program;
2018 };
2019
2020
2021 /**
2022  * State which can be shared by multiple contexts:
2023  */
2024 struct gl_shared_state
2025 {
2026    _glthread_Mutex Mutex;                  /**< for thread safety */
2027    GLint RefCount;                         /**< Reference count */
2028    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2029    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2030
2031    /**
2032     * \name Default texture objects (shared by all multi-texture units)
2033     */
2034    /*@{*/
2035    struct gl_texture_object *Default1D;
2036    struct gl_texture_object *Default2D;
2037    struct gl_texture_object *Default3D;
2038    struct gl_texture_object *DefaultCubeMap;
2039    struct gl_texture_object *DefaultRect;
2040    /*@}*/
2041
2042    /**
2043     * \name Vertex/fragment programs
2044     */
2045    /*@{*/
2046    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2047 #if FEATURE_ARB_vertex_program
2048    struct program *DefaultVertexProgram;
2049 #endif
2050 #if FEATURE_ARB_fragment_program
2051    struct program *DefaultFragmentProgram;
2052 #endif
2053 #if FEATURE_ATI_fragment_shader
2054    struct program *DefaultFragmentShader;
2055 #endif
2056    /*@}*/
2057
2058 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2059    struct _mesa_HashTable *BufferObjects;
2060 #endif
2061
2062    struct _mesa_HashTable *GL2Objects;
2063
2064 #if FEATURE_EXT_framebuffer_object
2065    struct _mesa_HashTable *RenderBuffers;
2066    struct _mesa_HashTable *FrameBuffers;
2067 #endif
2068
2069    void *DriverData;  /**< Device driver shared state */
2070 };
2071
2072
2073
2074
2075 /**
2076  * A renderbuffer stores colors or depth values or stencil values.
2077  * A framebuffer object will have a collection of these.
2078  * Data are read/written to the buffer with a handful of Get/Put functions.
2079  *
2080  * Instances of this object are allocated with the Driver's NewRenderbuffer
2081  * hook.  Drivers will likely wrap this class inside a driver-specific
2082  * class to simulate inheritance.
2083  */
2084 struct gl_renderbuffer
2085 {
2086    GLuint Name;
2087    GLint RefCount;
2088    GLuint Width, Height;
2089    GLenum InternalFormat; /* The user-specified value */
2090    GLenum _BaseFormat;    /* Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or */
2091                           /* GL_STENCIL_INDEX. */
2092    GLenum DataType;       /* Type of values passed to the Get/Put functions */
2093    GLubyte RedBits;       /**< Bits per image component */
2094    GLubyte GreenBits;
2095    GLubyte BlueBits;
2096    GLubyte AlphaBits;
2097    GLubyte IndexBits;
2098    GLubyte DepthBits;
2099    GLubyte StencilBits;
2100    GLvoid *Data;
2101
2102    /* Used to wrap one renderbuffer around another: */
2103    struct gl_renderbuffer *Wrapped;
2104
2105    /* Delete this renderbuffer */
2106    void (*Delete)(struct gl_renderbuffer *rb);
2107
2108    /* Allocate new storage for this renderbuffer */
2109    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2110                              GLenum internalFormat,
2111                              GLuint width, GLuint height);
2112
2113    /* Lock/Unlock are called before/after calling the Get/Put functions.
2114     * Not sure this is the right place for these yet.
2115    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2116    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2117     */
2118
2119    /* Return a pointer to the element/pixel at (x,y).
2120     * Should return NULL if the buffer memory can't be directly addressed.
2121     */
2122    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2123                        GLint x, GLint y);
2124
2125    /* Get/Read a row of values.
2126     * The values will be of format _BaseFormat and type DataType.
2127     */
2128    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2129                   GLint x, GLint y, void *values);
2130
2131    /* Get/Read values at arbitrary locations.
2132     * The values will be of format _BaseFormat and type DataType.
2133     */
2134    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2135                      const GLint x[], const GLint y[], void *values);
2136
2137    /* Put/Write a row of values.
2138     * The values will be of format _BaseFormat and type DataType.
2139     */
2140    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2141                   GLint x, GLint y, const void *values, const GLubyte *mask);
2142
2143    /* Put/Write a row of RGB values.  This is a special-case routine that's
2144     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2145     * a common case for glDrawPixels and some triangle routines.
2146     * The values will be of format GL_RGB and type DataType.
2147     */
2148    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2149                     GLint x, GLint y, const void *values, const GLubyte *mask);
2150
2151
2152    /* Put/Write a row of identical values.
2153     * The values will be of format _BaseFormat and type DataType.
2154     */
2155    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2156                      GLint x, GLint y, const void *value, const GLubyte *mask);
2157
2158    /* Put/Write values at arbitrary locations.
2159     * The values will be of format _BaseFormat and type DataType.
2160     */
2161    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2162                      const GLint x[], const GLint y[], const void *values,
2163                      const GLubyte *mask);
2164    /* Put/Write identical values at arbitrary locations.
2165     * The values will be of format _BaseFormat and type DataType.
2166     */
2167    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2168                          GLuint count, const GLint x[], const GLint y[],
2169                          const void *value, const GLubyte *mask);
2170 };
2171
2172
2173 /**
2174  * A renderbuffer attachment point points to either a texture object
2175  * (and specifies a mipmap level, cube face or 3D texture slice) or
2176  * points to a renderbuffer.
2177  */
2178 struct gl_renderbuffer_attachment
2179 {
2180    GLenum Type;  /* GL_NONE or GL_TEXTURE or GL_RENDERBUFFER_EXT */
2181    GLboolean Complete;
2182
2183    /* IF Type == GL_RENDERBUFFER_EXT: */
2184    struct gl_renderbuffer *Renderbuffer;
2185
2186    /* IF Type == GL_TEXTURE: */
2187    struct gl_texture_object *Texture;
2188    GLuint TextureLevel;
2189    GLuint CubeMapFace;  /* 0 .. 5, for cube map textures */
2190    GLuint Zoffset;      /* for 3D textures */
2191 };
2192
2193
2194 /**
2195  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2196  * In C++ terms, think of this as a base class from which device drivers
2197  * will make derived classes.
2198  */
2199 struct gl_framebuffer
2200 {
2201    GLuint Name;      /* if zero, this is a window system framebuffer */
2202    GLint RefCount;
2203
2204    GLvisual Visual;             /**< The corresponding visual */
2205
2206    GLboolean Initialized;
2207
2208    GLuint Width, Height;        /**< size of frame buffer in pixels */
2209
2210    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2211    /*@{*/
2212    GLint _Xmin, _Xmax;  /**< inclusive */
2213    GLint _Ymin, _Ymax;  /**< exclusive */
2214    /*@}*/
2215
2216    /** \name  Derived Z buffer stuff */
2217    /*@{*/
2218    GLuint _DepthMax;    /**< Max depth buffer value */
2219    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2220    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2221    /*@}*/
2222
2223    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2224
2225    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2226    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2227
2228    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2229     * attribute group and GL_PIXEL attribute group, respectively.
2230     */
2231    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2232    GLenum ColorReadBuffer;
2233
2234    /* These are computed from ColorDrawBuffer and ColorReadBuffer */
2235    GLbitfield _ColorDrawBufferMask[MAX_DRAW_BUFFERS]; /* Mask of BUFFER_BIT_* flags */
2236    GLint _ColorReadBufferIndex; /* -1 = None */
2237
2238    /* These are computed from _ColorDrawBufferMask and _ColorReadBufferIndex */
2239    GLuint _NumColorDrawBuffers[MAX_DRAW_BUFFERS];
2240    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS][4];
2241    struct gl_renderbuffer *_ColorReadBuffer;
2242
2243    /** Delete this framebuffer */
2244    void (*Delete)(struct gl_framebuffer *fb);
2245 };
2246
2247
2248 /**
2249  * Limits for vertex and fragment programs.
2250  */
2251 struct gl_program_constants
2252 {
2253    /* logical limits */
2254    GLuint MaxInstructions;
2255    GLuint MaxAluInstructions; /* fragment programs only, for now */
2256    GLuint MaxTexInstructions; /* fragment programs only, for now */
2257    GLuint MaxTexIndirections; /* fragment programs only, for now */
2258    GLuint MaxAttribs;
2259    GLuint MaxTemps;
2260    GLuint MaxAddressRegs; /* vertex program only, for now */
2261    GLuint MaxParameters;
2262    GLuint MaxLocalParams;
2263    GLuint MaxEnvParams;
2264    /* native/hardware limits */
2265    GLuint MaxNativeInstructions;
2266    GLuint MaxNativeAluInstructions; /* fragment programs only, for now */
2267    GLuint MaxNativeTexInstructions; /* fragment programs only, for now */
2268    GLuint MaxNativeTexIndirections; /* fragment programs only, for now */
2269    GLuint MaxNativeAttribs;
2270    GLuint MaxNativeTemps;
2271    GLuint MaxNativeAddressRegs; /* vertex program only, for now */
2272    GLuint MaxNativeParameters;
2273 };
2274
2275
2276 /**
2277  * Constants which may be overridden by device driver during context creation
2278  * but are never changed after that.
2279  */
2280 struct gl_constants
2281 {
2282    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2283    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2284    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2285    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2286    GLuint MaxTextureCoordUnits;
2287    GLuint MaxTextureImageUnits;
2288    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
2289    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2290    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2291    GLuint MaxArrayLockSize;
2292    GLint SubPixelBits;
2293    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2294    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2295    GLfloat PointSizeGranularity;
2296    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2297    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2298    GLfloat LineWidthGranularity;
2299    GLuint MaxColorTableSize;
2300    GLuint MaxConvolutionWidth;
2301    GLuint MaxConvolutionHeight;
2302    GLuint MaxClipPlanes;
2303    GLuint MaxLights;
2304    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2305    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2306    GLuint MaxViewportWidth, MaxViewportHeight;
2307    struct gl_program_constants VertexProgram;    /* GL_ARB_vertex_program */
2308    struct gl_program_constants FragmentProgram;  /* GL_ARB_fragment_program */
2309    /* shared by vertex and fragment program: */
2310    GLuint MaxProgramMatrices;
2311    GLuint MaxProgramMatrixStackDepth;
2312    /* vertex array / buffer object bounds checking */
2313    GLboolean CheckArrayBounds;
2314    /* GL_ARB_draw_buffers */
2315    GLuint MaxDrawBuffers;
2316    /* GL_OES_read_format */
2317    GLenum ColorReadFormat;
2318    GLenum ColorReadType;
2319    /* GL_EXT_framebuffer_object */
2320    GLuint MaxColorAttachments;
2321    GLuint MaxRenderbufferSize;
2322 };
2323
2324
2325 /**
2326  * Enable flag for each OpenGL extension.  Different device drivers will
2327  * enable different extensions at runtime.
2328  */
2329 struct gl_extensions
2330 {
2331    /**
2332     * \name Flags to quickly test if certain extensions are available.
2333     *
2334     * Not every extension needs to have such a flag, but it's encouraged.
2335     */
2336    /*@{*/
2337    GLboolean dummy;  /* don't remove this! */
2338    GLboolean ARB_depth_texture;
2339    GLboolean ARB_draw_buffers;
2340    GLboolean ARB_fragment_program;
2341    GLboolean ARB_fragment_shader;
2342    GLboolean ARB_half_float_pixel;
2343    GLboolean ARB_imaging;
2344    GLboolean ARB_multisample;
2345    GLboolean ARB_multitexture;
2346    GLboolean ARB_occlusion_query;
2347    GLboolean ARB_point_sprite;
2348    GLboolean ARB_shader_objects;
2349    GLboolean ARB_shading_language_100;
2350    GLboolean ARB_shadow;
2351    GLboolean ARB_texture_border_clamp;
2352    GLboolean ARB_texture_compression;
2353    GLboolean ARB_texture_cube_map;
2354    GLboolean ARB_texture_env_combine;
2355    GLboolean ARB_texture_env_crossbar;
2356    GLboolean ARB_texture_env_dot3;
2357    GLboolean ARB_texture_float;
2358    GLboolean ARB_texture_mirrored_repeat;
2359    GLboolean ARB_texture_non_power_of_two;
2360    GLboolean ARB_transpose_matrix;
2361    GLboolean ARB_vertex_buffer_object;
2362    GLboolean ARB_vertex_program;
2363    GLboolean ARB_vertex_shader;
2364    GLboolean ARB_window_pos;
2365    GLboolean EXT_abgr;
2366    GLboolean EXT_bgra;
2367    GLboolean EXT_blend_color;
2368    GLboolean EXT_blend_equation_separate;
2369    GLboolean EXT_blend_func_separate;
2370    GLboolean EXT_blend_logic_op;
2371    GLboolean EXT_blend_minmax;
2372    GLboolean EXT_blend_subtract;
2373    GLboolean EXT_clip_volume_hint;
2374    GLboolean EXT_cull_vertex;
2375    GLboolean EXT_convolution;
2376    GLboolean EXT_compiled_vertex_array;
2377    GLboolean EXT_copy_texture;
2378    GLboolean EXT_depth_bounds_test;
2379    GLboolean EXT_draw_range_elements;
2380    GLboolean EXT_framebuffer_object;
2381    GLboolean EXT_fog_coord;
2382    GLboolean EXT_framebuffer_blit;
2383    GLboolean EXT_histogram;
2384    GLboolean EXT_multi_draw_arrays;
2385    GLboolean EXT_paletted_texture;
2386    GLboolean EXT_packed_depth_stencil;
2387    GLboolean EXT_packed_pixels;
2388    GLboolean EXT_pixel_buffer_object;
2389    GLboolean EXT_point_parameters;
2390    GLboolean EXT_polygon_offset;
2391    GLboolean EXT_rescale_normal;
2392    GLboolean EXT_shadow_funcs;
2393    GLboolean EXT_secondary_color;
2394    GLboolean EXT_separate_specular_color;
2395    GLboolean EXT_shared_texture_palette;
2396    GLboolean EXT_stencil_wrap;
2397    GLboolean EXT_stencil_two_side;
2398    GLboolean EXT_subtexture;
2399    GLboolean EXT_texture;
2400    GLboolean EXT_texture_object;
2401    GLboolean EXT_texture3D;
2402    GLboolean EXT_texture_compression_s3tc;
2403    GLboolean EXT_texture_env_add;
2404    GLboolean EXT_texture_env_combine;
2405    GLboolean EXT_texture_env_dot3;
2406    GLboolean EXT_texture_filter_anisotropic;
2407    GLboolean EXT_texture_lod_bias;
2408    GLboolean EXT_texture_mirror_clamp;
2409    GLboolean EXT_timer_query;
2410    GLboolean EXT_vertex_array;
2411    GLboolean EXT_vertex_array_set;
2412    /* vendor extensions */
2413    GLboolean APPLE_client_storage;
2414    GLboolean APPLE_packed_pixels;
2415    GLboolean ATI_texture_mirror_once;
2416    GLboolean ATI_texture_env_combine3;
2417    GLboolean ATI_fragment_shader;
2418    GLboolean IBM_rasterpos_clip;
2419    GLboolean IBM_multimode_draw_arrays;
2420    GLboolean MESA_pack_invert;
2421    GLboolean MESA_packed_depth_stencil;
2422    GLboolean MESA_program_debug;
2423    GLboolean MESA_resize_buffers;
2424    GLboolean MESA_ycbcr_texture;
2425    GLboolean NV_blend_square;
2426    GLboolean NV_fragment_program;
2427    GLboolean NV_light_max_exponent;
2428    GLboolean NV_point_sprite;
2429    GLboolean NV_texgen_reflection;
2430    GLboolean NV_texture_rectangle;
2431    GLboolean NV_vertex_program;
2432    GLboolean NV_vertex_program1_1;
2433    GLboolean OES_read_format;
2434    GLboolean SGI_color_matrix;
2435    GLboolean SGI_color_table;
2436    GLboolean SGI_texture_color_table;
2437    GLboolean SGIS_generate_mipmap;
2438    GLboolean SGIS_pixel_texture;
2439    GLboolean SGIS_texture_edge_clamp;
2440    GLboolean SGIS_texture_lod;
2441    GLboolean SGIX_depth_texture;
2442    GLboolean SGIX_pixel_texture;
2443    GLboolean SGIX_shadow;
2444    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2445    GLboolean TDFX_texture_compression_FXT1;
2446    GLboolean S3_s3tc;
2447    /*@}*/
2448    /* The extension string */
2449    const GLubyte *String;
2450 };
2451
2452
2453 /**
2454  * A stack of matrices (projection, modelview, color, texture, etc).
2455  */
2456 struct matrix_stack
2457 {
2458    GLmatrix *Top;      /**< points into Stack */
2459    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2460    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2461    GLuint MaxDepth;    /**< size of Stack[] array */
2462    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2463 };
2464
2465
2466 /**
2467  * \name Bits for image transfer operations
2468  *
2469  * \sa __GLcontextRec::ImageTransferState.
2470  */
2471 /*@{*/
2472 #define IMAGE_SCALE_BIAS_BIT                      0x1
2473 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2474 #define IMAGE_MAP_COLOR_BIT                       0x4
2475 #define IMAGE_COLOR_TABLE_BIT                     0x8
2476 #define IMAGE_CONVOLUTION_BIT                     0x10
2477 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2478 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2479 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2480 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2481 #define IMAGE_HISTOGRAM_BIT                       0x200
2482 #define IMAGE_MIN_MAX_BIT                         0x400
2483 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2484
2485
2486 /** Pixel Transfer ops up to convolution */
2487 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2488                                     IMAGE_SHIFT_OFFSET_BIT |   \
2489                                     IMAGE_MAP_COLOR_BIT |      \
2490                                     IMAGE_COLOR_TABLE_BIT)
2491
2492 /** Pixel transfer ops after convolution */
2493 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2494                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2495                                      IMAGE_COLOR_MATRIX_BIT |                 \
2496                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2497                                      IMAGE_HISTOGRAM_BIT |                    \
2498                                      IMAGE_MIN_MAX_BIT)
2499 /*@}*/
2500
2501
2502 /**
2503  * \name Bits to indicate what state has changed.
2504  *
2505  * 4 unused flags.
2506  */
2507 /*@{*/
2508 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2509 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2510 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2511 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2512 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2513 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2514 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2515 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2516 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2517 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2518 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2519 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2520 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2521 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2522 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2523 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2524 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2525 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2526 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2527 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2528 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2529 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2530 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2531 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2532 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2533 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2534 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2535 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2536 #define _NEW_ALL ~0
2537 /*@}*/
2538
2539
2540 /**
2541  * \name Bits to track array state changes
2542  *
2543  * Also used to summarize array enabled.
2544  */
2545 /*@{*/
2546 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2547 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2548 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2549 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2550 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2551 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2552 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
2553 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
2554 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2555 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2556 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2557 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2558 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2559 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2560 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2561 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2562 #define _NEW_ARRAY_ATTRIB_0         0x10000  /* start at bit 16 */
2563 #define _NEW_ARRAY_ALL              0xffffffff
2564
2565
2566 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2567 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2568 /*@}*/
2569
2570
2571 /**
2572  * \name A bunch of flags that we think might be useful to drivers.
2573  *
2574  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2575  */
2576 /*@{*/
2577 #define DD_FLATSHADE                0x1
2578 #define DD_SEPARATE_SPECULAR        0x2
2579 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2580 #define DD_TRI_LIGHT_TWOSIDE        0x8
2581 #define DD_TRI_UNFILLED             0x10
2582 #define DD_TRI_SMOOTH               0x20
2583 #define DD_TRI_STIPPLE              0x40
2584 #define DD_TRI_OFFSET               0x80
2585 #define DD_LINE_SMOOTH              0x100
2586 #define DD_LINE_STIPPLE             0x200
2587 #define DD_LINE_WIDTH               0x400
2588 #define DD_POINT_SMOOTH             0x800
2589 #define DD_POINT_SIZE               0x1000
2590 #define DD_POINT_ATTEN              0x2000
2591 #define DD_TRI_TWOSTENCIL           0x4000
2592 /*@}*/
2593
2594
2595 /**
2596  * \name Define the state changes under which each of these bits might change
2597  */
2598 /*@{*/
2599 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2600 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2601 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2602 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2603 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2604 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2605 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2606 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2607 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2608 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2609 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2610 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2611 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2612 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2613 /*@}*/
2614
2615
2616 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2617                                            _NEW_TEXTURE |       \
2618                                            _NEW_POINT |         \
2619                                            _NEW_MODELVIEW)
2620
2621 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2622                                            _NEW_TEXTURE)
2623
2624 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2625
2626
2627
2628
2629 /*
2630  * Forward declaration of display list data types:
2631  */
2632 union node;
2633 typedef union node Node;
2634
2635
2636 /* This has to be included here. */
2637 #include "dd.h"
2638
2639
2640 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2641
2642 /**
2643  * Core Mesa's support for tnl modules:
2644  */
2645 struct gl_tnl_module
2646 {
2647    /**
2648     * Vertex format to be lazily swapped into current dispatch.
2649     */
2650    const GLvertexformat *Current;
2651
2652    /**
2653     * \name Record of functions swapped out.
2654     * On restore, only need to swap these functions back in.
2655     */
2656    /*@{*/
2657    struct {
2658        _glapi_proc * location;
2659        _glapi_proc function;
2660    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2661    GLuint SwapCount;
2662    /*@}*/
2663 };
2664
2665 /* Strictly this is a tnl/ private concept, but it doesn't seem
2666  * worthwhile adding a tnl private structure just to hold this one bit
2667  * of information:
2668  */
2669 #define MESA_DLIST_DANGLING_REFS     0x1
2670
2671 /* Provide a location where information about a display list can be
2672  * collected.  Could be extended with driverPrivate structures,
2673  * etc. in the future.
2674  */
2675 struct mesa_display_list
2676 {
2677    Node *node;
2678    GLuint id;
2679    GLbitfield flags;
2680 };
2681
2682
2683 /**
2684  * State used during display list compilation and execution.
2685  */
2686 struct mesa_list_state
2687 {
2688    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2689    GLuint CallDepth;            /**< Current recursion calling depth */
2690
2691    struct mesa_display_list *CurrentList;
2692    Node *CurrentListPtr;        /**< Head of list being compiled */
2693    GLuint CurrentListNum;       /**< Number of the list being compiled */
2694    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2695    GLuint CurrentPos;           /**< Index into current block of nodes */
2696
2697    GLvertexformat ListVtxfmt;
2698
2699    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2700    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2701
2702    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2703    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2704
2705    GLubyte ActiveIndex;
2706    GLfloat CurrentIndex;
2707
2708    GLubyte ActiveEdgeFlag;
2709    GLboolean CurrentEdgeFlag;
2710 };
2711
2712
2713 /**
2714  * Mesa rendering context.
2715  *
2716  * This is the central context data structure for Mesa.  Almost all
2717  * OpenGL state is contained in this structure.
2718  * Think of this as a base class from which device drivers will derive
2719  * sub classes.
2720  *
2721  * The GLcontext typedef names this structure.
2722  */
2723 struct __GLcontextRec
2724 {
2725    /**
2726     * \name OS related interfaces.
2727     *
2728     * These \b must be the first members of this structure, because they are
2729     * exposed to the outside world (i.e. GLX extension).
2730     */
2731    /*@{*/
2732    __GLimports imports;
2733    __GLexports exports;
2734    /*@}*/
2735
2736    /** State possibly shared with other contexts in the address space */
2737    struct gl_shared_state *Shared;
2738
2739    /** \name API function pointer tables */
2740    /*@{*/
2741    struct _glapi_table *Save;   /**< Display list save functions */
2742    struct _glapi_table *Exec;   /**< Execute functions */
2743    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2744    /*@}*/
2745
2746    GLvisual Visual;
2747    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2748    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2749    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2750    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2751
2752    /**
2753     * Device driver function pointer table
2754     */
2755    struct dd_function_table Driver;
2756
2757    void *DriverCtx;     /**< Points to device driver context/state */
2758    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2759
2760    /** Core/Driver constants */
2761    struct gl_constants Const;
2762
2763    /** \name The various 4x4 matrix stacks */
2764    /*@{*/
2765    struct matrix_stack ModelviewMatrixStack;
2766    struct matrix_stack ProjectionMatrixStack;
2767    struct matrix_stack ColorMatrixStack;
2768    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2769    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2770    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2771    /*@}*/
2772
2773    /** Combined modelview and projection matrix */
2774    GLmatrix _ModelProjectMatrix;
2775
2776    /** \name Display lists */
2777    struct mesa_list_state ListState;
2778
2779    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2780    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2781
2782    /** Extension information */
2783    struct gl_extensions Extensions;
2784
2785    /** \name State attribute stack (for glPush/PopAttrib) */
2786    /*@{*/
2787    GLuint AttribStackDepth;
2788    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2789    /*@}*/
2790
2791    /** \name Renderer attribute groups
2792     *
2793     * We define a struct for each attribute group to make pushing and popping
2794     * attributes easy.  Also it's a good organization.
2795     */
2796    /*@{*/
2797    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
2798    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
2799    struct gl_current_attrib     Current;        /**< Current attributes */
2800    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2801    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2802    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2803    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2804    struct gl_light_attrib       Light;          /**< Light attributes */
2805    struct gl_line_attrib        Line;           /**< Line attributes */
2806    struct gl_list_attrib        List;           /**< List attributes */
2807    struct gl_multisample_attrib Multisample;
2808    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2809    struct gl_point_attrib       Point;          /**< Point attributes */
2810    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2811    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2812    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2813    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2814    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2815    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2816    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2817    /*@}*/
2818
2819    /** \name Client attribute stack */
2820    /*@{*/
2821    GLuint ClientAttribStackDepth;
2822    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2823    /*@}*/
2824
2825    /** \name Client attribute groups */
2826    /*@{*/
2827    struct gl_array_attrib       Array;  /**< Vertex arrays */
2828    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2829    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2830    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2831    /*@}*/
2832
2833    /** \name Other assorted state (not pushed/popped on attribute stack) */
2834    /*@{*/
2835    struct gl_histogram_attrib   Histogram;
2836    struct gl_minmax_attrib      MinMax;
2837    struct gl_convolution_attrib Convolution1D;
2838    struct gl_convolution_attrib Convolution2D;
2839    struct gl_convolution_attrib Separable2D;
2840
2841    struct gl_evaluators EvalMap;   /**< All evaluators */
2842    struct gl_feedback   Feedback;  /**< Feedback */
2843    struct gl_selection  Select;    /**< Selection */
2844
2845    struct gl_color_table ColorTable;       /**< Pre-convolution */
2846    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2847    struct gl_color_table PostConvolutionColorTable;
2848    struct gl_color_table ProxyPostConvolutionColorTable;
2849    struct gl_color_table PostColorMatrixColorTable;
2850    struct gl_color_table ProxyPostColorMatrixColorTable;
2851
2852    struct gl_program_state Program;        /**< for vertex or fragment progs */
2853    struct gl_vertex_program_state VertexProgram;   /**< GL_NV_vertex_program */
2854    struct gl_fragment_program_state FragmentProgram;  /**< GL_NV_fragment_program */
2855    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
2856
2857    struct fragment_program *_TexEnvProgram;     /**< Texture state as fragment program */
2858    struct vertex_program *_TnlProgram;          /**< Fixed func TNL state as vertex program */
2859
2860    GLboolean _MaintainTexEnvProgram;
2861    GLboolean _MaintainTnlProgram;
2862
2863    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
2864
2865    struct gl_shader_objects_state ShaderObjects;        /* GL_ARB_shader_objects */
2866    /*@}*/
2867
2868 #if FEATURE_EXT_framebuffer_object
2869    struct gl_renderbuffer *CurrentRenderbuffer;
2870 #endif
2871
2872    GLenum ErrorValue;        /**< Last error code */
2873    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2874    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
2875
2876    /** \name Derived state */
2877    /*@{*/
2878    GLbitfield _TriangleCaps;      /**< bitwise-or of DD_* flags */
2879    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2880    GLfloat _EyeZDir[3];
2881    GLfloat _ModelViewInvScale;
2882    GLboolean _NeedEyeCoords;
2883    GLboolean _ForceEyeCoords;
2884    GLboolean _RotateMode;
2885    GLenum _CurrentProgram;    /* currently executing program */
2886
2887    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2888    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2889    /**@}*/
2890
2891    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2892
2893
2894    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2895                     *
2896                     * We don't have a better way to communicate this value from
2897                     * swrast_setup to swrast. */
2898
2899    /** \name Color clamping (tentative part of GL_ARB_color_clamp_control) */
2900    /*@{*/
2901    GLboolean ClampFragmentColors;
2902    GLboolean ClampVertexColors;
2903    /*@}*/
2904
2905    /** \name For debugging/development only */
2906    /*@{*/
2907    GLboolean FirstTimeCurrent;
2908    /*@}*/
2909
2910    /** Dither disable via MESA_NO_DITHER env var */
2911    GLboolean NoDither;
2912
2913    /** software compression/decompression supported or not */
2914    GLboolean Mesa_DXTn;
2915
2916    /** Core tnl module support */
2917    struct gl_tnl_module TnlModule;
2918
2919    /**
2920     * \name Hooks for module contexts.
2921     *
2922     * These will eventually live in the driver or elsewhere.
2923     */
2924    /*@{*/
2925    void *swrast_context;
2926    void *swsetup_context;
2927    void *swtnl_context;
2928    void *swtnl_im;
2929    void *acache_context;
2930    void *aelt_context;
2931    /*@}*/
2932 };
2933
2934
2935 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2936 extern const char *_mesa_prim_name[GL_POLYGON+4];
2937
2938
2939 #ifdef DEBUG
2940 extern int MESA_VERBOSE;
2941 extern int MESA_DEBUG_FLAGS;
2942 # define MESA_FUNCTION __FUNCTION__
2943 #else
2944 # define MESA_VERBOSE 0
2945 # define MESA_DEBUG_FLAGS 0
2946 # define MESA_FUNCTION "a function"
2947 # ifndef NDEBUG
2948 #  define NDEBUG
2949 # endif
2950 #endif
2951
2952
2953 enum _verbose
2954 {
2955    VERBOSE_VARRAY               = 0x0001,
2956    VERBOSE_TEXTURE              = 0x0002,
2957    VERBOSE_IMMEDIATE            = 0x0004,
2958    VERBOSE_PIPELINE             = 0x0008,
2959    VERBOSE_DRIVER               = 0x0010,
2960    VERBOSE_STATE                = 0x0020,
2961    VERBOSE_API                  = 0x0040,
2962    VERBOSE_DISPLAY_LIST         = 0x0100,
2963    VERBOSE_LIGHTING             = 0x0200,
2964    VERBOSE_PRIMS                = 0x0400,
2965    VERBOSE_VERTS                = 0x0800,
2966    VERBOSE_DISASSEM             = 0x1000
2967 };
2968
2969
2970 enum _debug
2971 {
2972    DEBUG_ALWAYS_FLUSH           = 0x1
2973 };
2974
2975
2976
2977 #define Elements(x) sizeof(x)/sizeof(*(x))
2978
2979
2980 #endif /* TYPES_H */