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