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:  6.3
  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 "config.h"             /* Hardwired parameters */
  40 #include "glapitable.h"
  41 #include "glthread.h"
  42 #include "math/m_matrix.h"      /* GLmatrix */
  43
  44
  45 /**
  46  * Color channel data type.
  47  */
  48 #if CHAN_BITS == 8
  49    typedef GLubyte GLchan;
  50 #define CHAN_MAX 255
  51 #define CHAN_MAXF 255.0F
  52 #define CHAN_TYPE GL_UNSIGNED_BYTE
  53 #elif CHAN_BITS == 16
  54    typedef GLushort GLchan;
  55 #define CHAN_MAX 65535
  56 #define CHAN_MAXF 65535.0F
  57 #define CHAN_TYPE GL_UNSIGNED_SHORT
  58 #elif CHAN_BITS == 32
  59    typedef GLfloat GLchan;
  60 #define CHAN_MAX 1.0
  61 #define CHAN_MAXF 1.0F
  62 #define CHAN_TYPE GL_FLOAT
  63 #else
  64 #error "illegal number of color channel bits"
  65 #endif
  66
  67
  68 /**
  69  * Accumulation buffer data type.
  70  */
  71 #if ACCUM_BITS==8
  72    typedef GLbyte GLaccum;
  73 #elif ACCUM_BITS==16
  74    typedef GLshort GLaccum;
  75 #elif ACCUM_BITS==32
  76    typedef GLfloat GLaccum;
  77 #else
  78 #  error "illegal number of accumulation bits"
  79 #endif
  80
  81
  82 /**
  83  * Stencil buffer data type.
  84  */
  85 #if STENCIL_BITS==8
  86    typedef GLubyte GLstencil;
  87 #  define STENCIL_MAX 0xff
  88 #elif STENCIL_BITS==16
  89    typedef GLushort GLstencil;
  90 #  define STENCIL_MAX 0xffff
  91 #else
  92 #  error "illegal number of stencil bits"
  93 #endif
  94
  95
  96 /**
  97  * Used for storing intermediate depth buffer values.
  98  * The actual depth/Z buffer might use 16 or 32-bit values.
  99  *
 100  * \note Must be 32-bits!
 101  */
 102 typedef GLuint GLdepth;
 103
 104
 105 /**
 106  * Fixed point data type.
 107  */
 108 typedef int GLfixed;
 109 /*
 110  * Fixed point arithmetic macros
 111  */
 112 #ifndef FIXED_FRAC_BITS
 113 #define FIXED_FRAC_BITS 11
 114 #endif
 115
 116 #define FIXED_SHIFT     FIXED_FRAC_BITS
 117 #define FIXED_ONE       (1 << FIXED_SHIFT)
 118 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
 119 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
 120 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
 121 #define FIXED_EPSILON   1
 122 #define FIXED_SCALE     ((float) FIXED_ONE)
 123 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 124 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 125 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 126 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 127 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 128 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 129 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 130 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 131 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 132 #define PosFloatToFixed(X)      FloatToFixed(X)
 133 #define SignedFloatToFixed(X)   FloatToFixed(X)
 134
 135
 136
 137 /**
 138  * \name Some forward type declarations
 139  */
 140 /*@{*/
 141 struct _mesa_HashTable;
 142 struct gl_texture_image;
 143 struct gl_texture_object;
 144 typedef struct __GLcontextRec GLcontext;
 145 typedef struct __GLcontextModesRec GLvisual;
 146 typedef struct gl_frame_buffer GLframebuffer;
 147 struct gl_pixelstore_attrib;
 148 struct gl_texture_format;
 149 /*@}*/
 150
 151
 152
 153 /**
 154  * Indexes for vertex program attributes.
 155  * GL_NV_vertex_program aliases generic attributes over the conventional
 156  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 157  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 158  * generic attributes are distinct/separate).
 159  */
 160 enum
 161 {
 162    VERT_ATTRIB_POS = 0,
 163    VERT_ATTRIB_WEIGHT = 1,
 164    VERT_ATTRIB_NORMAL = 2,
 165    VERT_ATTRIB_COLOR0 = 3,
 166    VERT_ATTRIB_COLOR1 = 4,
 167    VERT_ATTRIB_FOG = 5,
 168    VERT_ATTRIB_SIX = 6,
 169    VERT_ATTRIB_SEVEN = 7,
 170    VERT_ATTRIB_TEX0 = 8,
 171    VERT_ATTRIB_TEX1 = 9,
 172    VERT_ATTRIB_TEX2 = 10,
 173    VERT_ATTRIB_TEX3 = 11,
 174    VERT_ATTRIB_TEX4 = 12,
 175    VERT_ATTRIB_TEX5 = 13,
 176    VERT_ATTRIB_TEX6 = 14,
 177    VERT_ATTRIB_TEX7 = 15,
 178    VERT_ATTRIB_GENERIC0 = 16,
 179    VERT_ATTRIB_GENERIC1 = 17,
 180    VERT_ATTRIB_GENERIC2 = 18,
 181    VERT_ATTRIB_GENERIC3 = 19,
 182    VERT_ATTRIB_MAX = 16
 183 };
 184
 185 /**
 186  * Bitflags for vertex attributes.
 187  * These are used in bitfields in many places.
 188  */
 189 /*@{*/
 190 #define VERT_BIT_POS      (1 << VERT_ATTRIB_POS)
 191 #define VERT_BIT_WEIGHT   (1 << VERT_ATTRIB_WEIGHT)
 192 #define VERT_BIT_NORMAL   (1 << VERT_ATTRIB_NORMAL)
 193 #define VERT_BIT_COLOR0   (1 << VERT_ATTRIB_COLOR0)
 194 #define VERT_BIT_COLOR1   (1 << VERT_ATTRIB_COLOR1)
 195 #define VERT_BIT_FOG      (1 << VERT_ATTRIB_FOG)
 196 #define VERT_BIT_SIX      (1 << VERT_ATTRIB_SIX)
 197 #define VERT_BIT_SEVEN    (1 << VERT_ATTRIB_SEVEN)
 198 #define VERT_BIT_TEX0     (1 << VERT_ATTRIB_TEX0)
 199 #define VERT_BIT_TEX1     (1 << VERT_ATTRIB_TEX1)
 200 #define VERT_BIT_TEX2     (1 << VERT_ATTRIB_TEX2)
 201 #define VERT_BIT_TEX3     (1 << VERT_ATTRIB_TEX3)
 202 #define VERT_BIT_TEX4     (1 << VERT_ATTRIB_TEX4)
 203 #define VERT_BIT_TEX5     (1 << VERT_ATTRIB_TEX5)
 204 #define VERT_BIT_TEX6     (1 << VERT_ATTRIB_TEX6)
 205 #define VERT_BIT_TEX7     (1 << VERT_ATTRIB_TEX7)
 206 #define VERT_BIT_GENERIC0 (1 << VERT_ATTRIB_GENERIC0)
 207 #define VERT_BIT_GENERIC1 (1 << VERT_ATTRIB_GENERIC1)
 208 #define VERT_BIT_GENERIC2 (1 << VERT_ATTRIB_GENERIC2)
 209 #define VERT_BIT_GENERIC3 (1 << VERT_ATTRIB_GENERIC3)
 210
 211 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 212 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 213 /*@}*/
 214
 215
 216 /**
 217  * Indexes for vertex program result attributes
 218  */
 219 #define VERT_RESULT_HPOS 0
 220 #define VERT_RESULT_COL0 1
 221 #define VERT_RESULT_COL1 2
 222 #define VERT_RESULT_BFC0 3
 223 #define VERT_RESULT_BFC1 4
 224 #define VERT_RESULT_FOGC 5
 225 #define VERT_RESULT_PSIZ 6
 226 #define VERT_RESULT_TEX0 7
 227 #define VERT_RESULT_TEX1 8
 228 #define VERT_RESULT_TEX2 9
 229 #define VERT_RESULT_TEX3 10
 230 #define VERT_RESULT_TEX4 11
 231 #define VERT_RESULT_TEX5 12
 232 #define VERT_RESULT_TEX6 13
 233 #define VERT_RESULT_TEX7 14
 234 #define VERT_RESULT_MAX  15
 235
 236
 237 /**
 238  * Indexes for fragment program input attributes.
 239  */
 240 enum
 241 {
 242    FRAG_ATTRIB_WPOS = 0,
 243    FRAG_ATTRIB_COL0 = 1,
 244    FRAG_ATTRIB_COL1 = 2,
 245    FRAG_ATTRIB_FOGC = 3,
 246    FRAG_ATTRIB_TEX0 = 4,
 247    FRAG_ATTRIB_TEX1 = 5,
 248    FRAG_ATTRIB_TEX2 = 6,
 249    FRAG_ATTRIB_TEX3 = 7,
 250    FRAG_ATTRIB_TEX4 = 8,
 251    FRAG_ATTRIB_TEX5 = 9,
 252    FRAG_ATTRIB_TEX6 = 10,
 253    FRAG_ATTRIB_TEX7 = 11
 254 };
 255
 256 /*
 257  * Bitflags for fragment attributes.
 258  */
 259 /*@{*/
 260 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 261 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 262 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 263 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 264 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 265 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 266 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 267 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 268 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 269 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 270 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 271 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 272
 273 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 274                            FRAG_BIT_TEX1|       \
 275                            FRAG_BIT_TEX2|       \
 276                            FRAG_BIT_TEX3|       \
 277                            FRAG_BIT_TEX4|       \
 278                            FRAG_BIT_TEX5|       \
 279                            FRAG_BIT_TEX6|       \
 280                            FRAG_BIT_TEX7)
 281 /*@}*/
 282
 283
 284 /**
 285  * Bits for each basic buffer in a complete framebuffer.
 286  * When glDrawBuffer(GL_FRONT_AND_BACK) is called (non-stereo),
 287  * _DrawDestMask will be set to (DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT),
 288  * for example.  Also passed to ctx->Driver.Clear() to indicate which
 289  * buffers to clear.
 290  */
 291 /*@{*/
 292 #define DD_FRONT_LEFT_BIT  0x1
 293 #define DD_FRONT_RIGHT_BIT 0x2
 294 #define DD_BACK_LEFT_BIT   0x4
 295 #define DD_BACK_RIGHT_BIT  0x8
 296 #define DD_AUX0_BIT        0x10
 297 #define DD_AUX1_BIT        0x20
 298 #define DD_AUX2_BIT        0x40
 299 #define DD_AUX3_BIT        0x80
 300 #define DD_DEPTH_BIT       GL_DEPTH_BUFFER_BIT    /* 0x00000100 */
 301 #define DD_ACCUM_BIT       GL_ACCUM_BUFFER_BIT    /* 0x00000200 */
 302 #define DD_STENCIL_BIT     GL_STENCIL_BUFFER_BIT  /* 0x00000400 */
 303 /*@}*/
 304
 305
 306 /**
 307  * Data structure for color tables
 308  */
 309 struct gl_color_table
 310 {
 311    GLenum Format;         /**< GL_ALPHA, GL_RGB, GL_RGB, etc */
 312    GLenum IntFormat;
 313    GLuint Size;           /**< number of entries (rows) in table */
 314    GLvoid *Table;         /**< points to data of <Type> */
 315    GLenum Type;           /**< GL_UNSIGNED_BYTE or GL_FLOAT */
 316    GLubyte RedSize;
 317    GLubyte GreenSize;
 318    GLubyte BlueSize;
 319    GLubyte AlphaSize;
 320    GLubyte LuminanceSize;
 321    GLubyte IntensitySize;
 322 };
 323
 324
 325 /**
 326  * \name Bit flags used for updating material values.
 327  */
 328 /*@{*/
 329 #define MAT_ATTRIB_FRONT_AMBIENT           0
 330 #define MAT_ATTRIB_BACK_AMBIENT            1
 331 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 332 #define MAT_ATTRIB_BACK_DIFFUSE            3
 333 #define MAT_ATTRIB_FRONT_SPECULAR          4
 334 #define MAT_ATTRIB_BACK_SPECULAR           5
 335 #define MAT_ATTRIB_FRONT_EMISSION          6
 336 #define MAT_ATTRIB_BACK_EMISSION           7
 337 #define MAT_ATTRIB_FRONT_SHININESS         8
 338 #define MAT_ATTRIB_BACK_SHININESS          9
 339 #define MAT_ATTRIB_FRONT_INDEXES           10
 340 #define MAT_ATTRIB_BACK_INDEXES            11
 341 #define MAT_ATTRIB_MAX                     12
 342
 343 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 344 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 345 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 346 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 347 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 348 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 349
 350 #define MAT_INDEX_AMBIENT  0
 351 #define MAT_INDEX_DIFFUSE  1
 352 #define MAT_INDEX_SPECULAR 2
 353
 354 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 355 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 356 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 357 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 358 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 359 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 360 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 361 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 362 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 363 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 364 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 365 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 366
 367
 368 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 369                                  MAT_BIT_FRONT_AMBIENT |        \
 370                                  MAT_BIT_FRONT_DIFFUSE |        \
 371                                  MAT_BIT_FRONT_SPECULAR |       \
 372                                  MAT_BIT_FRONT_SHININESS |      \
 373                                  MAT_BIT_FRONT_INDEXES)
 374
 375 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 376                                  MAT_BIT_BACK_AMBIENT |         \
 377                                  MAT_BIT_BACK_DIFFUSE |         \
 378                                  MAT_BIT_BACK_SPECULAR |        \
 379                                  MAT_BIT_BACK_SHININESS |       \
 380                                  MAT_BIT_BACK_INDEXES)
 381
 382 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 383 /*@}*/
 384
 385
 386 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 387 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 388
 389 /**
 390  * Material shininess lookup table.
 391  */
 392 struct gl_shine_tab
 393 {
 394    struct gl_shine_tab *next, *prev;
 395    GLfloat tab[SHINE_TABLE_SIZE+1];
 396    GLfloat shininess;
 397    GLuint refcount;
 398 };
 399
 400
 401 /**
 402  * Light source state.
 403  */
 404 struct gl_light
 405 {
 406    struct gl_light *next;       /**< double linked list with sentinel */
 407    struct gl_light *prev;
 408
 409    GLfloat Ambient[4];          /**< ambient color */
 410    GLfloat Diffuse[4];          /**< diffuse color */
 411    GLfloat Specular[4];         /**< specular color */
 412    GLfloat EyePosition[4];      /**< position in eye coordinates */
 413    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 414    GLfloat SpotExponent;
 415    GLfloat SpotCutoff;          /**< in degrees */
 416    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 417    GLfloat ConstantAttenuation;
 418    GLfloat LinearAttenuation;
 419    GLfloat QuadraticAttenuation;
 420    GLboolean Enabled;           /**< On/off flag */
 421
 422    /**
 423     * \name Derived fields
 424     */
 425    /*@{*/
 426    GLuint _Flags;               /**< State */
 427
 428    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 429    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 430    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 431    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 432    GLfloat _VP_inf_spot_attenuation;
 433
 434    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 435    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 436    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 437    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 438    GLfloat _dli;                /**< CI diffuse light intensity */
 439    GLfloat _sli;                /**< CI specular light intensity */
 440    /*@}*/
 441 };
 442
 443
 444 /**
 445  * Light model state.
 446  */
 447 struct gl_lightmodel
 448 {
 449    GLfloat Ambient[4];          /**< ambient color */
 450    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 451    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 452    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 453                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 454 };
 455
 456
 457 /**
 458  * Material state.
 459  */
 460 struct gl_material
 461 {
 462    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 463 };
 464
 465
 466 /**
 467  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 468  */
 469 struct gl_accum_attrib
 470 {
 471    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 472 };
 473
 474
 475 /**
 476  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 477  */
 478 struct gl_colorbuffer_attrib
 479 {
 480    GLuint ClearIndex;                   /**< Index to use for glClear */
 481    GLclampf ClearColor[4];              /**< Color to use for glClear */
 482
 483    GLuint IndexMask;                    /**< Color index write mask */
 484    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 485
 486    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 487    GLbitfield _DrawDestMask[MAX_DRAW_BUFFERS];/**< bitmask of DD_*_BIT bits */
 488
 489    /**
 490     * \name alpha testing
 491     */
 492    /*@{*/
 493    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 494    GLenum AlphaFunc;                    /**< Alpha test function */
 495    GLclampf AlphaRef;                   /**< Alpha reference value */
 496    /*@}*/
 497
 498    /**
 499     * \name Blending
 500     */
 501    /*@{*/
 502    GLboolean BlendEnabled;              /**< Blending enabled flag */
 503    GLenum BlendSrcRGB;                  /**< Blending source operator */
 504    GLenum BlendDstRGB;                  /**< Blending destination operator */
 505    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 506    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 507    GLenum BlendEquationRGB;             /**< Blending equation */
 508    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 509    GLfloat BlendColor[4];               /**< Blending color */
 510    /*@}*/
 511
 512    /**
 513     * \name Logic op
 514     */
 515    /*@{*/
 516    GLenum LogicOp;                      /**< Logic operator */
 517    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 518    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 519    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 520    /*@}*/
 521
 522    GLboolean DitherFlag;                /**< Dither enable flag */
 523 };
 524
 525
 526 /**
 527  * Current attribute group (GL_CURRENT_BIT).
 528  */
 529 struct gl_current_attrib
 530 {
 531    /**
 532     * \name Values valid only when FLUSH_VERTICES has been called.
 533     */
 534    /*@{*/
 535    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 536                                                   *  indexed by VERT_ATTRIB_* */
 537    GLfloat Index;                               /**< Current color index */
 538    GLboolean EdgeFlag;                          /**< Current edge flag */
 539    /*@}*/
 540
 541    /**
 542     * \name Values are always valid.
 543     *
 544     * \note BTW, note how similar this set of attributes is to the SWvertex
 545     * data type in the software rasterizer...
 546     */
 547    /*@{*/
 548    GLfloat RasterPos[4];                        /**< Current raster position */
 549    GLfloat RasterDistance;                      /**< Current raster distance */
 550    GLfloat RasterColor[4];                      /**< Current raster color */
 551    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 552    GLfloat RasterIndex;                         /**< Current raster index */
 553    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 554    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 555    /*@}*/
 556 };
 557
 558
 559 /**
 560  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 561  */
 562 struct gl_depthbuffer_attrib
 563 {
 564    GLenum Func;                 /**< Function for depth buffer compare */
 565    GLclampd Clear;              /**< Value to clear depth buffer to */
 566    GLboolean Test;              /**< Depth buffering enabled flag */
 567    GLboolean Mask;              /**< Depth buffer writable? */
 568    GLboolean OcclusionTest;     /**< GL_HP_occlusion_test */
 569    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 570    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 571 };
 572
 573
 574 /**
 575  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
 576  */
 577 struct gl_enable_attrib
 578 {
 579    GLboolean AlphaTest;
 580    GLboolean AutoNormal;
 581    GLboolean Blend;
 582    GLuint ClipPlanes;
 583    GLboolean ColorMaterial;
 584    GLboolean ColorTable;                /* SGI_color_table */
 585    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 586    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 587    GLboolean Convolution1D;
 588    GLboolean Convolution2D;
 589    GLboolean Separable2D;
 590    GLboolean CullFace;
 591    GLboolean DepthTest;
 592    GLboolean Dither;
 593    GLboolean Fog;
 594    GLboolean Histogram;
 595    GLboolean Light[MAX_LIGHTS];
 596    GLboolean Lighting;
 597    GLboolean LineSmooth;
 598    GLboolean LineStipple;
 599    GLboolean IndexLogicOp;
 600    GLboolean ColorLogicOp;
 601    GLboolean Map1Color4;
 602    GLboolean Map1Index;
 603    GLboolean Map1Normal;
 604    GLboolean Map1TextureCoord1;
 605    GLboolean Map1TextureCoord2;
 606    GLboolean Map1TextureCoord3;
 607    GLboolean Map1TextureCoord4;
 608    GLboolean Map1Vertex3;
 609    GLboolean Map1Vertex4;
 610    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 611    GLboolean Map2Color4;
 612    GLboolean Map2Index;
 613    GLboolean Map2Normal;
 614    GLboolean Map2TextureCoord1;
 615    GLboolean Map2TextureCoord2;
 616    GLboolean Map2TextureCoord3;
 617    GLboolean Map2TextureCoord4;
 618    GLboolean Map2Vertex3;
 619    GLboolean Map2Vertex4;
 620    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 621    GLboolean MinMax;
 622    GLboolean Normalize;
 623    GLboolean PixelTexture;
 624    GLboolean PointSmooth;
 625    GLboolean PolygonOffsetPoint;
 626    GLboolean PolygonOffsetLine;
 627    GLboolean PolygonOffsetFill;
 628    GLboolean PolygonSmooth;
 629    GLboolean PolygonStipple;
 630    GLboolean RescaleNormals;
 631    GLboolean Scissor;
 632    GLboolean Stencil;
 633    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 634    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 635    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 636    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 637    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 638    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 639    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 640    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 641    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 642    /* SGI_texture_color_table */
 643    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 644    /* GL_NV_vertex_program */
 645    GLboolean VertexProgram;
 646    GLboolean VertexProgramPointSize;
 647    GLboolean VertexProgramTwoSide;
 648    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 649    GLboolean PointSprite;
 650    GLboolean FragmentShaderATI;
 651 };
 652
 653
 654 /**
 655  * Evaluator attribute group (GL_EVAL_BIT).
 656  */
 657 struct gl_eval_attrib
 658 {
 659    /**
 660     * \name Enable bits
 661     */
 662    /*@{*/
 663    GLboolean Map1Color4;
 664    GLboolean Map1Index;
 665    GLboolean Map1Normal;
 666    GLboolean Map1TextureCoord1;
 667    GLboolean Map1TextureCoord2;
 668    GLboolean Map1TextureCoord3;
 669    GLboolean Map1TextureCoord4;
 670    GLboolean Map1Vertex3;
 671    GLboolean Map1Vertex4;
 672    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 673    GLboolean Map2Color4;
 674    GLboolean Map2Index;
 675    GLboolean Map2Normal;
 676    GLboolean Map2TextureCoord1;
 677    GLboolean Map2TextureCoord2;
 678    GLboolean Map2TextureCoord3;
 679    GLboolean Map2TextureCoord4;
 680    GLboolean Map2Vertex3;
 681    GLboolean Map2Vertex4;
 682    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 683    GLboolean AutoNormal;
 684    /*@}*/
 685
 686    /**
 687     * \name Map Grid endpoints and divisions and calculated du values
 688     */
 689    /*@{*/
 690    GLint MapGrid1un;
 691    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 692    GLint MapGrid2un, MapGrid2vn;
 693    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 694    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 695    /*@}*/
 696 };
 697
 698
 699 /**
 700  * Fog attribute group (GL_FOG_BIT).
 701  */
 702 struct gl_fog_attrib
 703 {
 704    GLboolean Enabled;           /**< Fog enabled flag */
 705    GLfloat Color[4];            /**< Fog color */
 706    GLfloat Density;             /**< Density >= 0.0 */
 707    GLfloat Start;               /**< Start distance in eye coords */
 708    GLfloat End;                 /**< End distance in eye coords */
 709    GLfloat Index;               /**< Fog index */
 710    GLenum Mode;                 /**< Fog mode */
 711    GLboolean ColorSumEnabled;
 712    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 713 };
 714
 715
 716 /**
 717  * Hint attribute group (GL_HINT_BIT).
 718  *
 719  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 720  */
 721 struct gl_hint_attrib
 722 {
 723    GLenum PerspectiveCorrection;
 724    GLenum PointSmooth;
 725    GLenum LineSmooth;
 726    GLenum PolygonSmooth;
 727    GLenum Fog;
 728    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 729    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 730    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 731    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 732 };
 733
 734
 735 /**
 736  * Histogram attributes.
 737  */
 738 struct gl_histogram_attrib
 739 {
 740    GLuint Width;                                /**< number of table entries */
 741    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 742    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 743    GLboolean Sink;                              /**< terminate image transfer? */
 744    GLubyte RedSize;                             /**< Bits per counter */
 745    GLubyte GreenSize;
 746    GLubyte BlueSize;
 747    GLubyte AlphaSize;
 748    GLubyte LuminanceSize;
 749 };
 750
 751
 752 /**
 753  * Color Min/max state.
 754  */
 755 struct gl_minmax_attrib
 756 {
 757    GLenum Format;
 758    GLboolean Sink;
 759    GLfloat Min[4], Max[4];   /**< RGBA */
 760 };
 761
 762
 763 /**
 764  * Image convolution state.
 765  */
 766 struct gl_convolution_attrib
 767 {
 768    GLenum Format;
 769    GLenum InternalFormat;
 770    GLuint Width;
 771    GLuint Height;
 772    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 773 };
 774
 775
 776 /**
 777  * Light state flags.
 778  */
 779 /*@{*/
 780 #define LIGHT_SPOT         0x1
 781 #define LIGHT_LOCAL_VIEWER 0x2
 782 #define LIGHT_POSITIONAL   0x4
 783 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 784 /*@}*/
 785
 786
 787 /**
 788  * Lighting attribute group (GL_LIGHT_BIT).
 789  */
 790 struct gl_light_attrib
 791 {
 792    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 793    struct gl_lightmodel Model;          /**< Lighting model */
 794
 795    /**
 796     * Must flush FLUSH_VERTICES before referencing:
 797     */
 798    /*@{*/
 799    struct gl_material Material;         /**< Includes front & back values */
 800    /*@}*/
 801
 802    GLboolean Enabled;                   /**< Lighting enabled flag */
 803    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 804    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 805    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 806    GLuint ColorMaterialBitmask;         /**< bitmask formed from Face and Mode */
 807    GLboolean ColorMaterialEnabled;
 808
 809    struct gl_light EnabledList;         /**< List sentinel */
 810
 811    /**
 812     * Derived state for optimizations:
 813     */
 814    /*@{*/
 815    GLboolean _NeedEyeCoords;
 816    GLboolean _NeedVertices;             /**< Use fast shader? */
 817    GLuint  _Flags;                      /**< LIGHT_* flags, see above */
 818    GLfloat _BaseColor[2][3];
 819    /*@}*/
 820 };
 821
 822
 823 /**
 824  * Line attribute group (GL_LINE_BIT).
 825  */
 826 struct gl_line_attrib
 827 {
 828    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 829    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 830    GLushort StipplePattern;     /**< Stipple pattern */
 831    GLint StippleFactor;         /**< Stipple repeat factor */
 832    GLfloat Width;               /**< Line width */
 833    GLfloat _Width;              /**< Clamped Line width */
 834 };
 835
 836
 837 /**
 838  * Display list attribute group (GL_LIST_BIT).
 839  */
 840 struct gl_list_attrib
 841 {
 842    GLuint ListBase;
 843 };
 844
 845
 846 /**
 847  * Used by device drivers to hook new commands into display lists.
 848  */
 849 struct gl_list_instruction
 850 {
 851    GLuint Size;
 852    void (*Execute)( GLcontext *ctx, void *data );
 853    void (*Destroy)( GLcontext *ctx, void *data );
 854    void (*Print)( GLcontext *ctx, void *data );
 855 };
 856
 857 #define MAX_DLIST_EXT_OPCODES 16
 858
 859 /**
 860  * Used by device drivers to hook new commands into display lists.
 861  */
 862 struct gl_list_extensions
 863 {
 864    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 865    GLuint NumOpcodes;
 866 };
 867
 868
 869 /**
 870  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 871  */
 872 struct gl_multisample_attrib
 873 {
 874    GLboolean Enabled;
 875    GLboolean SampleAlphaToCoverage;
 876    GLboolean SampleAlphaToOne;
 877    GLboolean SampleCoverage;
 878    GLfloat SampleCoverageValue;
 879    GLboolean SampleCoverageInvert;
 880 };
 881
 882
 883 /**
 884  * Pixel attribute group (GL_PIXEL_MODE_BIT).
 885  */
 886 struct gl_pixel_attrib
 887 {
 888    GLenum ReadBuffer;           /**< source buffer for glReadPixels()/glCopyPixels() */
 889    GLubyte _ReadSrcMask;        /**< Not really a mask, but like _DrawDestMask
 890                                   *
 891                                   * May be: FRONT_LEFT_BIT, BACK_LEFT_BIT,
 892                                   * FRONT_RIGHT_BIT or BACK_RIGHT_BIT. */
 893    GLfloat RedBias, RedScale;
 894    GLfloat GreenBias, GreenScale;
 895    GLfloat BlueBias, BlueScale;
 896    GLfloat AlphaBias, AlphaScale;
 897    GLfloat DepthBias, DepthScale;
 898    GLint IndexShift, IndexOffset;
 899    GLboolean MapColorFlag;
 900    GLboolean MapStencilFlag;
 901    GLfloat ZoomX, ZoomY;
 902    /* XXX move these out of gl_pixel_attrib */
 903    GLint MapStoSsize;           /**< Size of each pixel map */
 904    GLint MapItoIsize;
 905    GLint MapItoRsize;
 906    GLint MapItoGsize;
 907    GLint MapItoBsize;
 908    GLint MapItoAsize;
 909    GLint MapRtoRsize;
 910    GLint MapGtoGsize;
 911    GLint MapBtoBsize;
 912    GLint MapAtoAsize;
 913    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 914    GLint MapItoI[MAX_PIXEL_MAP_TABLE];
 915    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 916    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 917    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 918    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 919    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 920    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 921    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 922    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 923    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 924    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 925    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 926    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 927    /** GL_EXT_histogram */
 928    GLboolean HistogramEnabled;
 929    GLboolean MinMaxEnabled;
 930    /** GL_SGIS_pixel_texture */
 931    GLboolean PixelTextureEnabled;
 932    GLenum FragmentRgbSource;
 933    GLenum FragmentAlphaSource;
 934    /** GL_SGI_color_matrix */
 935    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 936    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 937    /** GL_SGI_color_table */
 938    GLfloat ColorTableScale[4];
 939    GLfloat ColorTableBias[4];
 940    GLboolean ColorTableEnabled;
 941    GLfloat PCCTscale[4];
 942    GLfloat PCCTbias[4];
 943    GLboolean PostConvolutionColorTableEnabled;
 944    GLfloat PCMCTscale[4];
 945    GLfloat PCMCTbias[4];
 946    GLboolean PostColorMatrixColorTableEnabled;
 947    /** GL_SGI_texture_color_table */
 948    GLfloat TextureColorTableScale[4];
 949    GLfloat TextureColorTableBias[4];
 950    /** Convolution */
 951    GLboolean Convolution1DEnabled;
 952    GLboolean Convolution2DEnabled;
 953    GLboolean Separable2DEnabled;
 954    GLfloat ConvolutionBorderColor[3][4];
 955    GLenum ConvolutionBorderMode[3];
 956    GLfloat ConvolutionFilterScale[3][4];
 957    GLfloat ConvolutionFilterBias[3][4];
 958    GLfloat PostConvolutionScale[4];  /**< RGBA */
 959    GLfloat PostConvolutionBias[4];   /**< RGBA */
 960 };
 961
 962
 963 /**
 964  * Point attribute group (GL_POINT_BIT).
 965  */
 966 struct gl_point_attrib
 967 {
 968    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 969    GLfloat Size;                /**< User-specified point size */
 970    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
 971    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 972    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 973    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 974    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 975    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
 976    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV_point_sprite / GL_NV_point_sprite */
 977    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 978    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
 979 };
 980
 981
 982 /**
 983  * Polygon attribute group (GL_POLYGON_BIT).
 984  */
 985 struct gl_polygon_attrib
 986 {
 987    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
 988    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
 989    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
 990    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
 991    GLboolean CullFlag;          /**< Culling on/off flag */
 992    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
 993    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
 994    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
 995    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
 996    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
 997    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
 998    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
 999    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1000 };
1001
1002
1003 /**
1004  * Scissor attributes (GL_SCISSOR_BIT).
1005  */
1006 struct gl_scissor_attrib
1007 {
1008    GLboolean Enabled;           /**< Scissor test enabled? */
1009    GLint X, Y;                  /**< Lower left corner of box */
1010    GLsizei Width, Height;       /**< Size of box */
1011 };
1012
1013
1014 /**
1015  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1016  */
1017 struct gl_stencil_attrib
1018 {
1019    GLboolean Enabled;           /**< Enabled flag */
1020    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1021    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1022    GLenum Function[2];          /**< Stencil function */
1023    GLenum FailFunc[2];          /**< Fail function */
1024    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1025    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1026    GLstencil Ref[2];            /**< Reference value */
1027    GLstencil ValueMask[2];      /**< Value mask */
1028    GLstencil WriteMask[2];      /**< Write mask */
1029    GLstencil Clear;             /**< Clear value */
1030 };
1031
1032
1033 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
1034
1035 /**
1036  * An index for each type of texture object
1037  */
1038 /*@{*/
1039 #define TEXTURE_1D_INDEX    0
1040 #define TEXTURE_2D_INDEX    1
1041 #define TEXTURE_3D_INDEX    2
1042 #define TEXTURE_CUBE_INDEX  3
1043 #define TEXTURE_RECT_INDEX  4
1044 /*@}*/
1045
1046 /**
1047  * Bit flags for each type of texture object
1048  * Used for Texture.Unit[]._ReallyEnabled flags.
1049  */
1050 /*@{*/
1051 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
1052 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
1053 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
1054 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
1055 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
1056 /*@}*/
1057
1058
1059 /**
1060  * TexGenEnabled flags.
1061  */
1062 /*@{*/
1063 #define S_BIT 1
1064 #define T_BIT 2
1065 #define R_BIT 4
1066 #define Q_BIT 8
1067 /*@}*/
1068
1069
1070 /**
1071  * Bit flag versions of the corresponding GL_ constants.
1072  */
1073 /*@{*/
1074 #define TEXGEN_SPHERE_MAP        0x1
1075 #define TEXGEN_OBJ_LINEAR        0x2
1076 #define TEXGEN_EYE_LINEAR        0x4
1077 #define TEXGEN_REFLECTION_MAP_NV 0x8
1078 #define TEXGEN_NORMAL_MAP_NV     0x10
1079
1080 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1081                                   TEXGEN_REFLECTION_MAP_NV | \
1082                                   TEXGEN_NORMAL_MAP_NV)
1083 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1084                                   TEXGEN_REFLECTION_MAP_NV | \
1085                                   TEXGEN_NORMAL_MAP_NV     | \
1086                                   TEXGEN_EYE_LINEAR)
1087 /*@}*/
1088
1089
1090 /* A selection of state flags to make driver and module's lives easier. */
1091 #define ENABLE_TEXGEN0        0x1
1092 #define ENABLE_TEXGEN1        0x2
1093 #define ENABLE_TEXGEN2        0x4
1094 #define ENABLE_TEXGEN3        0x8
1095 #define ENABLE_TEXGEN4        0x10
1096 #define ENABLE_TEXGEN5        0x20
1097 #define ENABLE_TEXGEN6        0x40
1098 #define ENABLE_TEXGEN7        0x80
1099
1100 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1101 #define ENABLE_TEXMAT1        0x2
1102 #define ENABLE_TEXMAT2        0x4
1103 #define ENABLE_TEXMAT3        0x8
1104 #define ENABLE_TEXMAT4        0x10
1105 #define ENABLE_TEXMAT5        0x20
1106 #define ENABLE_TEXMAT6        0x40
1107 #define ENABLE_TEXMAT7        0x80
1108
1109 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1110 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1111
1112
1113 /**
1114  * Texel fetch function prototype.  We use texel fetch functions to
1115  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1116  * texture images.  These functions help to isolate us from the gritty
1117  * details of all the various texture image encodings.
1118  *
1119  * \param texImage texture image.
1120  * \param col texel column.
1121  * \param row texel row.
1122  * \param img texel image level/layer.
1123  * \param texelOut output texel (up to 4 GLchans)
1124  */
1125 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1126                                  GLint col, GLint row, GLint img,
1127                                  GLchan *texelOut );
1128
1129 /**
1130  * As above, but returns floats.
1131  * Used for depth component images and for upcoming signed/float
1132  * texture images.
1133  */
1134 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1135                                  GLint col, GLint row, GLint img,
1136                                  GLfloat *texelOut );
1137
1138
1139 /**
1140  * TexImage store function.  This is called by the glTex[Sub]Image
1141  * functions and is responsible for converting the user-specified texture
1142  * image into a specific (hardware) image format.
1143  */
1144 typedef GLboolean (*StoreTexImageFunc)(GLcontext *ctx, GLuint dims,
1145                           GLenum baseInternalFormat,
1146                           const struct gl_texture_format *dstFormat,
1147                           GLvoid *dstAddr,
1148                           GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
1149                           GLint dstRowStride, GLint dstImageStride,
1150                           GLint srcWidth, GLint srcHeight, GLint srcDepth,
1151                           GLenum srcFormat, GLenum srcType,
1152                           const GLvoid *srcAddr,
1153                           const struct gl_pixelstore_attrib *srcPacking);
1154
1155
1156
1157 /**
1158  * Texture format record
1159  */
1160 struct gl_texture_format
1161 {
1162    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1163
1164    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1165                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1166                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1167                                  *   GL_DEPTH_COMPONENT.
1168                                  */
1169    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1170    GLubyte RedBits;             /**< Bits per texel component */
1171    GLubyte GreenBits;           /**< These are just rough approximations for */
1172    GLubyte BlueBits;            /**< compressed texture formats. */
1173    GLubyte AlphaBits;
1174    GLubyte LuminanceBits;
1175    GLubyte IntensityBits;
1176    GLubyte IndexBits;
1177    GLubyte DepthBits;
1178
1179    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1180
1181    StoreTexImageFunc StoreImage;
1182
1183    /**
1184     * \name Texel fetch function pointers
1185     */
1186    /*@{*/
1187    FetchTexelFuncC FetchTexel1D;
1188    FetchTexelFuncC FetchTexel2D;
1189    FetchTexelFuncC FetchTexel3D;
1190    FetchTexelFuncF FetchTexel1Df;
1191    FetchTexelFuncF FetchTexel2Df;
1192    FetchTexelFuncF FetchTexel3Df;
1193    /*@}*/
1194 };
1195
1196
1197 /**
1198  * Texture image state.  Describes the dimensions of a texture image,
1199  * the texel format and pointers to Texel Fetch functions.
1200  */
1201 struct gl_texture_image
1202 {
1203    GLenum Format;               /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1204                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1205                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1206                                  *   GL_DEPTH_COMPONENT only.
1207                                  *   Used for choosing TexEnv arithmetic.
1208                                  */
1209    GLint IntFormat;             /**< Internal format as given by the user */
1210    GLuint Border;               /**< 0 or 1 */
1211    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1212    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1213    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1214    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1215    GLuint Width2;               /**< = Width - 2*Border */
1216    GLuint Height2;              /**< = Height - 2*Border */
1217    GLuint Depth2;               /**< = Depth - 2*Border */
1218    GLuint WidthLog2;            /**< = log2(Width2) */
1219    GLuint HeightLog2;           /**< = log2(Height2) */
1220    GLuint DepthLog2;            /**< = log2(Depth2) */
1221    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1222    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1223    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1224    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1225    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1226    GLboolean IsClientData;      /**< Data owned by client? */
1227    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1228
1229    const struct gl_texture_format *TexFormat;
1230
1231    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1232
1233    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1234    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1235
1236    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1237    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1238
1239    /**
1240     * \name For device driver:
1241     */
1242    /*@{*/
1243    void *DriverData;            /**< Arbitrary device driver data */
1244    /*@}*/
1245 };
1246
1247
1248 /**
1249  * Indexes for cube map faces.
1250  */
1251 /*@{*/
1252 #define FACE_POS_X   0
1253 #define FACE_NEG_X   1
1254 #define FACE_POS_Y   2
1255 #define FACE_NEG_Y   3
1256 #define FACE_POS_Z   4
1257 #define FACE_NEG_Z   5
1258 #define MAX_FACES  6
1259 /*@}*/
1260
1261
1262 /**
1263  * Texture object state.  Contains the array of mipmap images, border color,
1264  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1265  * color palette.
1266  */
1267 struct gl_texture_object
1268 {
1269    _glthread_Mutex Mutex;       /**< for thread safety */
1270    GLint RefCount;              /**< reference count */
1271    GLuint Name;                 /**< the user-visible texture object ID */
1272    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1273    GLfloat Priority;            /**< in [0,1] */
1274    GLfloat BorderColor[4];      /**< unclamped */
1275    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1276    GLenum WrapS;                /**< S-axis texture image wrap mode */
1277    GLenum WrapT;                /**< T-axis texture image wrap mode */
1278    GLenum WrapR;                /**< R-axis texture image wrap mode */
1279    GLenum MinFilter;            /**< minification filter */
1280    GLenum MagFilter;            /**< magnification filter */
1281    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1282    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1283    GLfloat LodBias;             /**< OpenGL 1.4 */
1284    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1285    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1286    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1287    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1288    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1289    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1290    GLenum CompareMode;          /**< GL_ARB_shadow */
1291    GLenum CompareFunc;          /**< GL_ARB_shadow */
1292    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1293    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1294    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1295    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1296    GLboolean _IsPowerOfTwo;     /**< Are all image dimensions powers of two? */
1297    GLboolean Complete;          /**< Is texture object complete? */
1298
1299    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1300    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1301
1302    /** GL_EXT_paletted_texture */
1303    struct gl_color_table Palette;
1304
1305
1306    /**
1307     * \name For device driver.
1308     * Note: instead of attaching driver data to this pointer, it's preferable
1309     * to instead use this struct as a base class for your own texture object
1310     * class.  Driver->NewTextureObject() can be used to implement the
1311     * allocation.
1312     */
1313    void *DriverData;    /**< Arbitrary device driver data */
1314 };
1315
1316
1317 /**
1318  * Texture combine environment state.
1319  *
1320  * \todo
1321  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1322  * structure will need to be expanded for 4 elements.
1323  */
1324 struct gl_tex_env_combine_state
1325 {
1326    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1327    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1328    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1329    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1330    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1331    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1332    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1333    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1334    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1335    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1336 };
1337
1338
1339 /**
1340  * Texture unit state.  Contains enable flags, texture environment/function/
1341  * combiners, texgen state, pointers to current texture objects and
1342  * post-filter color tables.
1343  */
1344 struct gl_texture_unit
1345 {
1346    GLuint Enabled;              /**< bitmask of TEXTURE_*_BIT flags */
1347    GLuint _ReallyEnabled;       /**< 0 or exactly one of TEXTURE_*_BIT flags */
1348
1349    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1350    GLfloat EnvColor[4];
1351    GLuint TexGenEnabled;        /**< Bitwise-OR of [STRQ]_BIT values */
1352    /** \name Tex coord generation mode
1353     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1354    /*@{*/
1355    GLenum GenModeS;
1356    GLenum GenModeT;
1357    GLenum GenModeR;
1358    GLenum GenModeQ;
1359    /*@}*/
1360    GLuint _GenBitS;
1361    GLuint _GenBitT;
1362    GLuint _GenBitR;
1363    GLuint _GenBitQ;
1364    GLuint _GenFlags;            /**< bitwise or of GenBit[STRQ] */
1365    GLfloat ObjectPlaneS[4];
1366    GLfloat ObjectPlaneT[4];
1367    GLfloat ObjectPlaneR[4];
1368    GLfloat ObjectPlaneQ[4];
1369    GLfloat EyePlaneS[4];
1370    GLfloat EyePlaneT[4];
1371    GLfloat EyePlaneR[4];
1372    GLfloat EyePlaneQ[4];
1373    GLfloat LodBias;             /**< for biasing mipmap levels */
1374
1375    /**
1376     * \name GL_EXT_texture_env_combine
1377     */
1378    struct gl_tex_env_combine_state Combine;
1379
1380    /**
1381     * Derived state based on \c EnvMode and the \c BaseFormat of the
1382     * currently enabled texture.
1383     */
1384    struct gl_tex_env_combine_state _EnvMode;
1385
1386    /**
1387     * Currently enabled combiner state.  This will point to either
1388     * \c Combine or \c _EnvMode.
1389     */
1390    struct gl_tex_env_combine_state *_CurrentCombine;
1391
1392    struct gl_texture_object *Current1D;
1393    struct gl_texture_object *Current2D;
1394    struct gl_texture_object *Current3D;
1395    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1396    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1397
1398    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1399
1400    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1401    struct gl_texture_object Saved2D;
1402    struct gl_texture_object Saved3D;
1403    struct gl_texture_object SavedCubeMap;
1404    struct gl_texture_object SavedRect;
1405
1406    /* GL_SGI_texture_color_table */
1407    struct gl_color_table ColorTable;
1408    struct gl_color_table ProxyColorTable;
1409    GLboolean ColorTableEnabled;
1410 };
1411
1412
1413 /**
1414  * Texture attribute group (GL_TEXTURE_BIT).
1415  */
1416 struct gl_texture_attrib
1417 {
1418    /**
1419     * name multitexture
1420     */
1421    /**@{*/
1422    GLuint CurrentUnit;          /**< Active texture unit */
1423    GLuint _EnabledUnits;        /**< one bit set for each really-enabled unit */
1424    GLuint _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1425    GLuint _GenFlags;            /**< for texgen */
1426    GLuint _TexGenEnabled;
1427    GLuint _TexMatEnabled;
1428    /**@}*/
1429
1430    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1431
1432    struct gl_texture_object *Proxy1D;
1433    struct gl_texture_object *Proxy2D;
1434    struct gl_texture_object *Proxy3D;
1435    struct gl_texture_object *ProxyCubeMap;
1436    struct gl_texture_object *ProxyRect;
1437
1438    /** GL_EXT_shared_texture_palette */
1439    GLboolean SharedPalette;
1440    struct gl_color_table Palette;
1441 };
1442
1443
1444 /**
1445  * Transformation attribute group (GL_TRANSFORM_BIT).
1446  */
1447 struct gl_transform_attrib
1448 {
1449    GLenum MatrixMode;                           /**< Matrix mode */
1450    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1451    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1452    GLuint ClipPlanesEnabled;                    /**< on/off bitmask */
1453    GLboolean Normalize;                         /**< Normalize all normals? */
1454    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1455    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1456
1457    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1458    GLfloat CullEyePos[4];
1459    GLfloat CullObjPos[4];
1460 };
1461
1462
1463 /**
1464  * Viewport attribute group (GL_VIEWPORT_BIT).
1465  */
1466 struct gl_viewport_attrib
1467 {
1468    GLint X, Y;                  /**< position */
1469    GLsizei Width, Height;       /**< size */
1470    GLfloat Near, Far;           /**< Depth buffer range */
1471    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1472 };
1473
1474
1475 /**
1476  * Node for the attribute stack.
1477  */
1478 struct gl_attrib_node
1479 {
1480    GLbitfield kind;
1481    void *data;
1482    struct gl_attrib_node *next;
1483 };
1484
1485
1486 /**
1487  * GL_ARB_vertex/pixel_buffer_object buffer object
1488  */
1489 struct gl_buffer_object
1490 {
1491    GLint RefCount;
1492    GLuint Name;
1493    GLenum Usage;
1494    GLenum Access;
1495    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1496    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1497    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1498    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1499 };
1500
1501
1502
1503 /**
1504  * Client pixel packing/unpacking attributes
1505  */
1506 struct gl_pixelstore_attrib
1507 {
1508    GLint Alignment;
1509    GLint RowLength;
1510    GLint SkipPixels;
1511    GLint SkipRows;
1512    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1513    GLint SkipImages;      /**< for GL_EXT_texture3D */
1514    GLboolean SwapBytes;
1515    GLboolean LsbFirst;
1516    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1517    GLboolean Invert;        /**< GL_MESA_pack_invert */
1518    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1519 };
1520
1521
1522 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1523
1524
1525 /**
1526  * Client vertex array attributes
1527  */
1528 struct gl_client_array
1529 {
1530    GLint Size;                  /**< components per element (1,2,3,4) */
1531    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1532    GLsizei Stride;              /**< user-specified stride */
1533    GLsizei StrideB;             /**< actual stride in bytes */
1534    const GLubyte *Ptr;          /**< Points to array data */
1535    GLuint Enabled;              /**< one of the _NEW_ARRAY_ bits */
1536    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1537
1538    /**< GL_ARB_vertex_buffer_object */
1539    struct gl_buffer_object *BufferObj;
1540    GLuint _MaxElement;
1541
1542    GLuint Flags;
1543 };
1544
1545
1546 /**
1547  * Vertex array state
1548  */
1549 struct gl_array_attrib
1550 {
1551    struct gl_client_array Vertex;            /**< client data descriptors */
1552    struct gl_client_array Normal;
1553    struct gl_client_array Color;
1554    struct gl_client_array SecondaryColor;
1555    struct gl_client_array FogCoord;
1556    struct gl_client_array Index;
1557    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1558    struct gl_client_array EdgeFlag;
1559
1560    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1561
1562    GLint ActiveTexture;         /**< Client Active Texture */
1563    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1564    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1565
1566    GLuint _Enabled;             /**< _NEW_ARRAY_* - bit set if array enabled */
1567    GLuint NewState;             /**< _NEW_ARRAY_* */
1568
1569 #if FEATURE_ARB_vertex_buffer_object
1570    struct gl_buffer_object *NullBufferObj;
1571    struct gl_buffer_object *ArrayBufferObj;
1572    struct gl_buffer_object *ElementArrayBufferObj;
1573 #endif
1574    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1575 };
1576
1577
1578 /**
1579  * Feedback buffer state
1580  */
1581 struct gl_feedback
1582 {
1583    GLenum Type;
1584    GLuint _Mask;                /* FB_* bits */
1585    GLfloat *Buffer;
1586    GLuint BufferSize;
1587    GLuint Count;
1588 };
1589
1590
1591 /**
1592  * Selection buffer state
1593  */
1594 struct gl_selection
1595 {
1596    GLuint *Buffer;      /**< selection buffer */
1597    GLuint BufferSize;   /**< size of the selection buffer */
1598    GLuint BufferCount;  /**< number of values in the selection buffer */
1599    GLuint Hits;         /**< number of records in the selection buffer */
1600    GLuint NameStackDepth; /**< name stack depth */
1601    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1602    GLboolean HitFlag;   /**< hit flag */
1603    GLfloat HitMinZ;     /**< minimum hit depth */
1604    GLfloat HitMaxZ;     /**< maximum hit depth */
1605 };
1606
1607
1608 /**
1609  * 1-D Evaluator control points
1610  */
1611 struct gl_1d_map
1612 {
1613    GLuint Order;        /**< Number of control points */
1614    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1615    GLfloat *Points;     /**< Points to contiguous control points */
1616 };
1617
1618
1619 /**
1620  * 2-D Evaluator control points
1621  */
1622 struct gl_2d_map
1623 {
1624    GLuint Uorder;               /**< Number of control points in U dimension */
1625    GLuint Vorder;               /**< Number of control points in V dimension */
1626    GLfloat u1, u2, du;
1627    GLfloat v1, v2, dv;
1628    GLfloat *Points;             /**< Points to contiguous control points */
1629 };
1630
1631
1632 /**
1633  * All evaluator control point state
1634  */
1635 struct gl_evaluators
1636 {
1637    /**
1638     * \name 1-D maps
1639     */
1640    /*@{*/
1641    struct gl_1d_map Map1Vertex3;
1642    struct gl_1d_map Map1Vertex4;
1643    struct gl_1d_map Map1Index;
1644    struct gl_1d_map Map1Color4;
1645    struct gl_1d_map Map1Normal;
1646    struct gl_1d_map Map1Texture1;
1647    struct gl_1d_map Map1Texture2;
1648    struct gl_1d_map Map1Texture3;
1649    struct gl_1d_map Map1Texture4;
1650    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1651    /*@}*/
1652
1653    /**
1654     * \name 2-D maps
1655     */
1656    /*@{*/
1657    struct gl_2d_map Map2Vertex3;
1658    struct gl_2d_map Map2Vertex4;
1659    struct gl_2d_map Map2Index;
1660    struct gl_2d_map Map2Color4;
1661    struct gl_2d_map Map2Normal;
1662    struct gl_2d_map Map2Texture1;
1663    struct gl_2d_map Map2Texture2;
1664    struct gl_2d_map Map2Texture3;
1665    struct gl_2d_map Map2Texture4;
1666    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1667    /*@}*/
1668 };
1669
1670
1671 /**
1672  * NV_fragment_program runtime state
1673  */
1674 struct fp_machine
1675 {
1676    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1677    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1678    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1679    GLuint CondCodes[4];
1680 };
1681
1682 /**
1683  * ATI_fragment_shader runtime state
1684  */
1685 #define ATI_FS_INPUT_PRIMARY 0
1686 #define ATI_FS_INPUT_SECONDARY 1
1687
1688 /* 6 register sets - 2 inputs (primary, secondary) */
1689 struct atifs_machine
1690 {
1691    GLfloat Registers[6][4];
1692    GLfloat PrevPassRegisters[6][4];
1693    GLfloat Inputs[2][4];
1694    GLuint pass;
1695 };
1696
1697
1698 /**
1699  * Names of the various vertex/fragment register files
1700  */
1701 enum register_file
1702 {
1703    PROGRAM_TEMPORARY,
1704    PROGRAM_INPUT,
1705    PROGRAM_OUTPUT,
1706    PROGRAM_LOCAL_PARAM,
1707    PROGRAM_ENV_PARAM,
1708    PROGRAM_NAMED_PARAM,
1709    PROGRAM_STATE_VAR,
1710    PROGRAM_WRITE_ONLY,
1711    PROGRAM_ADDRESS
1712 };
1713
1714
1715 /** Vertex and fragment instructions */
1716 struct vp_instruction;
1717 struct fp_instruction;
1718 struct atifs_instruction;
1719 struct program_parameter_list;
1720
1721
1722 /**
1723  * Base class for any kind of program object
1724  */
1725 struct program
1726 {
1727    GLuint Id;
1728    GLubyte *String;          /**< Null-terminated program text */
1729    GLint RefCount;
1730    GLenum Target;
1731    GLenum Format;            /**< String encoding format */
1732    GLboolean Resident;
1733    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1734    GLuint NumInstructions;  /* GL_ARB_vertex/fragment_program */
1735    GLuint NumTemporaries;
1736    GLuint NumParameters;
1737    GLuint NumAttributes;
1738    GLuint NumAddressRegs;
1739 };
1740
1741
1742 /** Vertex program object */
1743 struct vertex_program
1744 {
1745    struct program Base;   /* base class */
1746    struct vp_instruction *Instructions;  /* Compiled instructions */
1747    GLboolean IsNVProgram; /* GL_NV_vertex_program ? */
1748    GLboolean IsPositionInvariant;  /* GL_NV_vertex_program1_1 */
1749    GLuint InputsRead;     /* Bitmask of which input regs are read */
1750    GLuint OutputsWritten; /* Bitmask of which output regs are written to */
1751    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1752 };
1753
1754
1755 /** Fragment program object */
1756 struct fragment_program
1757 {
1758    struct program Base;   /**< base class */
1759    struct fp_instruction *Instructions;  /**< Compiled instructions */
1760    GLuint InputsRead;     /**< Bitmask of which input regs are read */
1761    GLuint OutputsWritten; /**< Bitmask of which output regs are written to */
1762    GLuint TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_INDEX bitmask */
1763    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1764    GLuint NumTexInstructions;
1765    GLuint NumTexIndirections;
1766    GLenum FogOption;
1767    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1768
1769 #ifdef USE_TCC
1770    char c_str[4096];            /* experimental... */
1771    int c_strlen;
1772 #endif
1773 };
1774
1775 struct ati_fragment_shader
1776 {
1777    struct program Base;
1778    struct atifs_instruction *Instructions;
1779    GLfloat Constants[8][4];
1780    GLint NumPasses;
1781    GLint cur_pass;
1782 };
1783
1784 /**
1785  * State common to vertex and fragment programs.
1786  */
1787 struct gl_program_state
1788 {
1789    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_NV */
1790    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_NV */
1791 };
1792
1793
1794 /**
1795  * State vars for GL_ARB/GL_NV_vertex_program
1796  */
1797 struct gl_vertex_program_state
1798 {
1799    GLboolean Enabled;                  /**< GL_VERTEX_PROGRAM_NV */
1800    GLboolean _Enabled;                 /**< Really enabled? */
1801    GLboolean PointSizeEnabled;         /**< GL_VERTEX_PROGRAM_POINT_SIZE_NV */
1802    GLboolean TwoSideEnabled;           /**< GL_VERTEX_PROGRAM_TWO_SIDE_NV */
1803    struct vertex_program *Current;     /**< ptr to currently bound program */
1804
1805    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1806    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1807
1808    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1809    /* Only used during program execution (may be moved someday): */
1810    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1811    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1812    GLuint InputsSize[MAX_NV_VERTEX_PROGRAM_INPUTS];
1813    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1814    GLint AddressReg[4];
1815
1816 #if FEATURE_MESA_program_debug
1817    GLprogramcallbackMESA Callback;
1818    GLvoid *CallbackData;
1819    GLboolean CallbackEnabled;
1820    GLuint CurrentPosition;
1821 #endif
1822 };
1823
1824
1825 /*
1826  * State for GL_ARB/NV_fragment_program
1827  */
1828 struct gl_fragment_program_state
1829 {
1830    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1831    GLboolean _Enabled;                   /* Really enabled? */
1832    GLboolean _Active;                    /* Really really enabled? */
1833    struct fragment_program *Current;     /* ptr to currently bound program */
1834    struct fragment_program *_Current;    /* ptr to currently active program */
1835    struct fp_machine Machine;            /* machine state */
1836    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1837
1838 #if FEATURE_MESA_program_debug
1839    GLprogramcallbackMESA Callback;
1840    GLvoid *CallbackData;
1841    GLboolean CallbackEnabled;
1842    GLuint CurrentPosition;
1843 #endif
1844 };
1845
1846 /*
1847  * State for GL_fragment_shader
1848  */
1849 struct gl_ati_fragment_shader_state
1850 {
1851    GLboolean Enabled;
1852    GLboolean _Enabled;
1853    GLboolean Compiling;
1854    struct atifs_machine Machine;            /* machine state */
1855    struct ati_fragment_shader *Current;
1856 };
1857
1858 /*
1859  * State for GL_ARB_occlusion_query
1860  */
1861 struct gl_occlusion_state
1862 {
1863    GLboolean Active;
1864    GLuint CurrentQueryObject;
1865    GLuint PassedCounter;
1866    struct _mesa_HashTable *QueryObjects;
1867 };
1868
1869 /**
1870  * gl2 unique interface identifier.
1871  * Each gl2 interface has its own interface id used for object queries.
1872  */
1873 enum gl2_uiid
1874 {
1875    UIID_UNKNOWN,                /* supported by all objects */
1876    UIID_GENERIC,                /* generic object */
1877    UIID_CONTAINER,              /* contains generic objects */
1878    UIID_SHADER,                 /* shader object */
1879    UIID_FRAGMENT_SHADER,        /* fragment shader */
1880    UIID_VERTEX_SHADER,          /* vertex shader */
1881    UIID_PROGRAM,                /* program object */
1882    UIID_3DLABS_SHHANDLE         /* encapsulates 3dlabs' ShHandle */
1883 };
1884
1885 struct gl2_unknown_intf
1886 {
1887    GLvoid (* AddRef) (struct gl2_unknown_intf **);
1888    GLvoid (* Release) (struct gl2_unknown_intf **);
1889    struct gl2_unknown_intf **(* QueryInterface) (struct gl2_unknown_intf **, enum gl2_uiid uiid);
1890 };
1891
1892 struct gl2_generic_intf
1893 {
1894    struct gl2_unknown_intf _unknown;
1895    GLvoid (* Delete) (struct gl2_generic_intf **);
1896    GLenum (* GetType) (struct gl2_generic_intf **);
1897    GLhandleARB (* GetName) (struct gl2_generic_intf **);
1898    GLboolean (* GetDeleteStatus) (struct gl2_generic_intf **);
1899    const GLcharARB *(* GetInfoLog) (struct gl2_generic_intf **);
1900 };
1901
1902 struct gl2_container_intf
1903 {
1904    struct gl2_generic_intf _generic;
1905    GLboolean (* Attach) (struct gl2_container_intf **, struct gl2_generic_intf **);
1906    GLboolean (* Detach) (struct gl2_container_intf **, struct gl2_generic_intf **);
1907    GLsizei (* GetAttachedCount) (struct gl2_container_intf **);
1908    struct gl2_generic_intf **(* GetAttached) (struct gl2_container_intf **, GLuint);
1909 };
1910
1911 struct gl2_shader_intf
1912 {
1913    struct gl2_generic_intf _generic;
1914    GLenum (* GetSubType) (struct gl2_shader_intf **);
1915    GLboolean (* GetCompileStatus) (struct gl2_shader_intf **);
1916    GLvoid (* SetSource) (struct gl2_shader_intf **, GLcharARB *, GLint *, GLsizei);
1917    const GLcharARB *(* GetSource) (struct gl2_shader_intf **);
1918    GLvoid (* Compile) (struct gl2_shader_intf **);
1919 };
1920
1921 struct gl2_program_intf
1922 {
1923    struct gl2_container_intf _container;
1924    GLboolean (* GetLinkStatus) (struct gl2_program_intf **);
1925    GLboolean (* GetValidateStatus) (struct gl2_program_intf **);
1926    GLvoid (* Link) (struct gl2_program_intf **);
1927    GLvoid (* Validate) (struct gl2_program_intf **);
1928 };
1929
1930 struct gl2_fragment_shader_intf
1931 {
1932    struct gl2_shader_intf _shader;
1933 };
1934
1935 struct gl2_vertex_shader_intf
1936 {
1937    struct gl2_shader_intf _shader;
1938 };
1939
1940 struct gl2_3dlabs_shhandle_intf
1941 {
1942    struct gl2_unknown_intf _unknown;
1943    GLvoid *(* GetShHandle) (struct gl2_3dlabs_shhandle_intf **);
1944 };
1945
1946 struct gl_shader_objects_state
1947 {
1948    struct gl2_program_intf **current_program;
1949 };
1950
1951
1952 /**
1953  * State which can be shared by multiple contexts:
1954  */
1955 struct gl_shared_state
1956 {
1957    _glthread_Mutex Mutex;                  /**< for thread safety */
1958    GLint RefCount;                         /**< Reference count */
1959    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
1960    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
1961
1962    /**
1963     * \name Default texture objects (shared by all multi-texture units)
1964     */
1965    /*@{*/
1966    struct gl_texture_object *Default1D;
1967    struct gl_texture_object *Default2D;
1968    struct gl_texture_object *Default3D;
1969    struct gl_texture_object *DefaultCubeMap;
1970    struct gl_texture_object *DefaultRect;
1971    /*@}*/
1972
1973    /**
1974     * \name Vertex/fragment programs
1975     */
1976    /*@{*/
1977    struct _mesa_HashTable *Programs;
1978 #if FEATURE_ARB_vertex_program
1979    struct program *DefaultVertexProgram;
1980 #endif
1981 #if FEATURE_ARB_fragment_program
1982    struct program *DefaultFragmentProgram;
1983 #endif
1984 #if FEATURE_ATI_fragment_shader
1985    struct program *DefaultFragmentShader;
1986 #endif
1987    /*@}*/
1988
1989 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
1990    struct _mesa_HashTable *BufferObjects;
1991 #endif
1992
1993    struct _mesa_HashTable *GL2Objects;
1994
1995 #if FEATURE_EXT_framebuffer_object
1996    struct _mesa_HashTable *RenderBuffers;
1997    struct _mesa_HashTable *FrameBuffers;
1998 #endif
1999
2000    void *DriverData;  /**< Device driver shared state */
2001 };
2002
2003
2004 /**
2005  * Frame buffer.
2006  *
2007  * A "frame buffer" is a color buffer and its optional ancillary buffers:
2008  * depth, accum, stencil, and software-simulated alpha buffers.
2009  * In C++ terms, think of this as a base class from which device drivers
2010  * will make derived classes.
2011  */
2012 struct gl_frame_buffer
2013 {
2014    GLvisual Visual;             /**< The corresponding visual */
2015
2016    GLuint Width, Height;        /**< size of frame buffer in pixels */
2017
2018    GLboolean Initialized;
2019
2020    GLboolean UseSoftwareDepthBuffer;
2021    GLboolean UseSoftwareAccumBuffer;
2022    GLboolean UseSoftwareStencilBuffer;
2023    GLboolean UseSoftwareAlphaBuffers;
2024    GLboolean UseSoftwareAuxBuffers;
2025
2026    /** \name Software depth (aka Z) buffer */
2027    /*@{*/
2028    GLvoid *DepthBuffer;         /**< array [Width*Height] of GLushort or GLuint*/
2029    /*@}*/
2030
2031    /** \name Software stencil buffer */
2032    /*@{*/
2033    GLstencil *Stencil;          /**< array [Width*Height] of GLstencil values */
2034    /*@}*/
2035
2036    /** \name Software accumulation buffer */
2037    /*@{*/
2038    GLaccum *Accum;              /**< array [4*Width*Height] of GLaccum values */
2039    /*@}*/
2040
2041    /** \name Software alpha planes */
2042    /*@{*/
2043    GLchan *FrontLeftAlpha;      /**< array [Width*Height] of GLchan */
2044    GLchan *BackLeftAlpha;       /**< array [Width*Height] of GLchan */
2045    GLchan *FrontRightAlpha;     /**< array [Width*Height] of GLchan */
2046    GLchan *BackRightAlpha;      /**< array [Width*Height] of GLchan */
2047    /*@}*/
2048
2049    GLchan *AuxBuffers[MAX_AUX_BUFFERS];
2050
2051    /**
2052     * \name Drawing bounds
2053     *
2054     * Intersection of window size and scissor box
2055     */
2056    /*@{*/
2057    GLint _Xmin;  /**< inclusive */
2058    GLint _Ymin;  /**< inclusive */
2059    GLint _Xmax;  /**< exclusive */
2060    GLint _Ymax;  /**< exclusive */
2061    /*@}*/
2062 };
2063
2064
2065 /**
2066  * Constants which may be overridden by device driver during context creation
2067  * but are never changed after that.
2068  */
2069 struct gl_constants
2070 {
2071    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2072    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2073    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2074    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2075    GLuint MaxTextureCoordUnits;
2076    GLuint MaxTextureImageUnits;
2077    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
2078    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2079    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2080    GLuint MaxArrayLockSize;
2081    GLint SubPixelBits;
2082    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2083    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2084    GLfloat PointSizeGranularity;
2085    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2086    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2087    GLfloat LineWidthGranularity;
2088    GLuint MaxColorTableSize;
2089    GLuint MaxConvolutionWidth;
2090    GLuint MaxConvolutionHeight;
2091    GLuint MaxClipPlanes;
2092    GLuint MaxLights;
2093    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2094    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2095    GLuint MaxViewportWidth, MaxViewportHeight;
2096    /* GL_ARB_vertex_program */
2097    GLuint MaxVertexProgramInstructions;
2098    GLuint MaxVertexProgramAttribs;
2099    GLuint MaxVertexProgramTemps;
2100    GLuint MaxVertexProgramLocalParams;
2101    GLuint MaxVertexProgramEnvParams;
2102    GLuint MaxVertexProgramAddressRegs;
2103    /* GL_ARB_fragment_program */
2104    GLuint MaxFragmentProgramInstructions;
2105    GLuint MaxFragmentProgramAttribs;
2106    GLuint MaxFragmentProgramTemps;
2107    GLuint MaxFragmentProgramLocalParams;
2108    GLuint MaxFragmentProgramEnvParams;
2109    GLuint MaxFragmentProgramAddressRegs;
2110    GLuint MaxFragmentProgramAluInstructions;
2111    GLuint MaxFragmentProgramTexInstructions;
2112    GLuint MaxFragmentProgramTexIndirections;
2113    /* vertex or fragment program */
2114    GLuint MaxProgramMatrices;
2115    GLuint MaxProgramMatrixStackDepth;
2116    /* vertex array / buffer object bounds checking */
2117    GLboolean CheckArrayBounds;
2118    /* GL_ARB_draw_buffers */
2119    GLuint MaxDrawBuffers;
2120    /* GL_OES_read_format */
2121    GLenum ColorReadFormat;
2122    GLenum ColorReadType;
2123    /* GL_EXT_framebuffer_object */
2124    GLuint MaxColorAttachments;
2125    GLuint MaxRenderbufferSize;
2126 };
2127
2128
2129 /**
2130  * Enable flag for each OpenGL extension.  Different device drivers will
2131  * enable different extensions at runtime.
2132  */
2133 struct gl_extensions
2134 {
2135    /**
2136     * \name Flags to quickly test if certain extensions are available.
2137     *
2138     * Not every extension needs to have such a flag, but it's encouraged.
2139     */
2140    /*@{*/
2141    GLboolean dummy;  /* don't remove this! */
2142    GLboolean ARB_depth_texture;
2143    GLboolean ARB_draw_buffers;
2144    GLboolean ARB_fragment_program;
2145    GLboolean ARB_fragment_shader;
2146    GLboolean ARB_half_float_pixel;
2147    GLboolean ARB_imaging;
2148    GLboolean ARB_multisample;
2149    GLboolean ARB_multitexture;
2150    GLboolean ARB_occlusion_query;
2151    GLboolean ARB_point_sprite;
2152    GLboolean ARB_shader_objects;
2153    GLboolean ARB_shading_language_100;
2154    GLboolean ARB_shadow;
2155    GLboolean ARB_texture_border_clamp;
2156    GLboolean ARB_texture_compression;
2157    GLboolean ARB_texture_cube_map;
2158    GLboolean ARB_texture_env_combine;
2159    GLboolean ARB_texture_env_crossbar;
2160    GLboolean ARB_texture_env_dot3;
2161    GLboolean ARB_texture_float;
2162    GLboolean ARB_texture_mirrored_repeat;
2163    GLboolean ARB_texture_non_power_of_two;
2164    GLboolean ARB_transpose_matrix;
2165    GLboolean ARB_vertex_buffer_object;
2166    GLboolean ARB_vertex_program;
2167    GLboolean ARB_vertex_shader;
2168    GLboolean ARB_window_pos;
2169    GLboolean EXT_abgr;
2170    GLboolean EXT_bgra;
2171    GLboolean EXT_blend_color;
2172    GLboolean EXT_blend_equation_separate;
2173    GLboolean EXT_blend_func_separate;
2174    GLboolean EXT_blend_logic_op;
2175    GLboolean EXT_blend_minmax;
2176    GLboolean EXT_blend_subtract;
2177    GLboolean EXT_clip_volume_hint;
2178    GLboolean EXT_cull_vertex;
2179    GLboolean EXT_convolution;
2180    GLboolean EXT_compiled_vertex_array;
2181    GLboolean EXT_copy_texture;
2182    GLboolean EXT_depth_bounds_test;
2183    GLboolean EXT_draw_range_elements;
2184    GLboolean EXT_framebuffer_object;
2185    GLboolean EXT_fog_coord;
2186    GLboolean EXT_histogram;
2187    GLboolean EXT_multi_draw_arrays;
2188    GLboolean EXT_paletted_texture;
2189    GLboolean EXT_packed_pixels;
2190    GLboolean EXT_pixel_buffer_object;
2191    GLboolean EXT_point_parameters;
2192    GLboolean EXT_polygon_offset;
2193    GLboolean EXT_rescale_normal;
2194    GLboolean EXT_shadow_funcs;
2195    GLboolean EXT_secondary_color;
2196    GLboolean EXT_separate_specular_color;
2197    GLboolean EXT_shared_texture_palette;
2198    GLboolean EXT_stencil_wrap;
2199    GLboolean EXT_stencil_two_side;
2200    GLboolean EXT_subtexture;
2201    GLboolean EXT_texture;
2202    GLboolean EXT_texture_object;
2203    GLboolean EXT_texture3D;
2204    GLboolean EXT_texture_compression_s3tc;
2205    GLboolean EXT_texture_env_add;
2206    GLboolean EXT_texture_env_combine;
2207    GLboolean EXT_texture_env_dot3;
2208    GLboolean EXT_texture_filter_anisotropic;
2209    GLboolean EXT_texture_lod_bias;
2210    GLboolean EXT_texture_mirror_clamp;
2211    GLboolean EXT_vertex_array;
2212    GLboolean EXT_vertex_array_set;
2213    /* vendor extensions */
2214    GLboolean APPLE_client_storage;
2215    GLboolean APPLE_packed_pixels;
2216    GLboolean ATI_texture_mirror_once;
2217    GLboolean ATI_texture_env_combine3;
2218    GLboolean ATI_fragment_shader;
2219    GLboolean HP_occlusion_test;
2220    GLboolean IBM_rasterpos_clip;
2221    GLboolean IBM_multimode_draw_arrays;
2222    GLboolean MESA_pack_invert;
2223    GLboolean MESA_packed_depth_stencil;
2224    GLboolean MESA_program_debug;
2225    GLboolean MESA_resize_buffers;
2226    GLboolean MESA_ycbcr_texture;
2227    GLboolean NV_blend_square;
2228    GLboolean NV_fragment_program;
2229    GLboolean NV_light_max_exponent;
2230    GLboolean NV_point_sprite;
2231    GLboolean NV_texgen_reflection;
2232    GLboolean NV_texture_rectangle;
2233    GLboolean NV_vertex_program;
2234    GLboolean NV_vertex_program1_1;
2235    GLboolean OES_read_format;
2236    GLboolean SGI_color_matrix;
2237    GLboolean SGI_color_table;
2238    GLboolean SGI_texture_color_table;
2239    GLboolean SGIS_generate_mipmap;
2240    GLboolean SGIS_pixel_texture;
2241    GLboolean SGIS_texture_edge_clamp;
2242    GLboolean SGIS_texture_lod;
2243    GLboolean SGIX_depth_texture;
2244    GLboolean SGIX_pixel_texture;
2245    GLboolean SGIX_shadow;
2246    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2247    GLboolean TDFX_texture_compression_FXT1;
2248    GLboolean S3_s3tc;
2249    /*@}*/
2250    /* The extension string */
2251    const GLubyte *String;
2252 };
2253
2254
2255 /**
2256  * A stack of matrices (projection, modelview, color, texture, etc).
2257  */
2258 struct matrix_stack
2259 {
2260    GLmatrix *Top;      /**< points into Stack */
2261    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2262    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2263    GLuint MaxDepth;    /**< size of Stack[] array */
2264    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2265 };
2266
2267
2268 /**
2269  * \name Bits for image transfer operations
2270  *
2271  * \sa __GLcontextRec::ImageTransferState.
2272  */
2273 /*@{*/
2274 #define IMAGE_SCALE_BIAS_BIT                      0x1
2275 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2276 #define IMAGE_MAP_COLOR_BIT                       0x4
2277 #define IMAGE_COLOR_TABLE_BIT                     0x8
2278 #define IMAGE_CONVOLUTION_BIT                     0x10
2279 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2280 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2281 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2282 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2283 #define IMAGE_HISTOGRAM_BIT                       0x200
2284 #define IMAGE_MIN_MAX_BIT                         0x400
2285 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2286
2287
2288 /** Pixel Transfer ops up to convolution */
2289 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2290                                     IMAGE_SHIFT_OFFSET_BIT |   \
2291                                     IMAGE_MAP_COLOR_BIT |      \
2292                                     IMAGE_COLOR_TABLE_BIT)
2293
2294 /** Pixel transfer ops after convolution */
2295 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2296                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2297                                      IMAGE_COLOR_MATRIX_BIT |                 \
2298                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2299                                      IMAGE_HISTOGRAM_BIT |                    \
2300                                      IMAGE_MIN_MAX_BIT)
2301 /*@}*/
2302
2303
2304 /**
2305  * \name Bits to indicate what state has changed.
2306  *
2307  * 4 unused flags.
2308  */
2309 /*@{*/
2310 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2311 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2312 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2313 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2314 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2315 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2316 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2317 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2318 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2319 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2320 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2321 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2322 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2323 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2324 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2325 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2326 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2327 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2328 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2329 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2330 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2331 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2332 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2333 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2334 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2335 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2336 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2337 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2338 #define _NEW_ALL ~0
2339 /*@}*/
2340
2341
2342 /**
2343  * \name Bits to track array state changes
2344  *
2345  * Also used to summarize array enabled.
2346  */
2347 /*@{*/
2348 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2349 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2350 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2351 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2352 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2353 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2354 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
2355 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
2356 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2357 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2358 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2359 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2360 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2361 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2362 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2363 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2364 #define _NEW_ARRAY_ATTRIB_0         0x10000  /* start at bit 16 */
2365 #define _NEW_ARRAY_ALL              0xffffffff
2366
2367
2368 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2369 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2370 /*@}*/
2371
2372
2373 /**
2374  * \name A bunch of flags that we think might be useful to drivers.
2375  *
2376  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2377  */
2378 /*@{*/
2379 #define DD_FLATSHADE                0x1
2380 #define DD_SEPARATE_SPECULAR        0x2
2381 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2382 #define DD_TRI_LIGHT_TWOSIDE        0x8
2383 #define DD_TRI_UNFILLED             0x10
2384 #define DD_TRI_SMOOTH               0x20
2385 #define DD_TRI_STIPPLE              0x40
2386 #define DD_TRI_OFFSET               0x80
2387 #define DD_LINE_SMOOTH              0x100
2388 #define DD_LINE_STIPPLE             0x200
2389 #define DD_LINE_WIDTH               0x400
2390 #define DD_POINT_SMOOTH             0x800
2391 #define DD_POINT_SIZE               0x1000
2392 #define DD_POINT_ATTEN              0x2000
2393 #define DD_TRI_TWOSTENCIL           0x4000
2394 /*@}*/
2395
2396
2397 /**
2398  * \name Define the state changes under which each of these bits might change
2399  */
2400 /*@{*/
2401 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2402 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2403 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2404 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2405 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2406 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2407 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2408 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2409 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2410 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2411 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2412 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2413 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2414 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2415 /*@}*/
2416
2417
2418 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2419                                            _NEW_TEXTURE |       \
2420                                            _NEW_POINT |         \
2421                                            _NEW_MODELVIEW)
2422
2423 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2424                                            _NEW_TEXTURE)
2425
2426 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2427
2428
2429
2430
2431 /*
2432  * Forward declaration of display list data types:
2433  */
2434 union node;
2435 typedef union node Node;
2436
2437
2438 /* This has to be included here. */
2439 #include "dd.h"
2440
2441
2442 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2443
2444 /**
2445  * Core Mesa's support for tnl modules:
2446  */
2447 struct gl_tnl_module
2448 {
2449    /**
2450     * Vertex format to be lazily swapped into current dispatch.
2451     */
2452    const GLvertexformat *Current;
2453
2454    /**
2455     * \name Record of functions swapped out.
2456     * On restore, only need to swap these functions back in.
2457     */
2458    /*@{*/
2459    void *Swapped[NUM_VERTEX_FORMAT_ENTRIES][2];
2460    GLuint SwapCount;
2461    /*@}*/
2462 };
2463
2464 /* Strictly this is a tnl/ private concept, but it doesn't seem
2465  * worthwhile adding a tnl private structure just to hold this one bit
2466  * of information:
2467  */
2468 #define MESA_DLIST_DANGLING_REFS     0x1
2469
2470 /* Provide a location where information about a display list can be
2471  * collected.  Could be extended with driverPrivate structures,
2472  * etc. in the future.
2473  */
2474 struct mesa_display_list
2475 {
2476    Node *node;
2477    GLuint id;
2478    GLuint flags;
2479 };
2480
2481
2482 /**
2483  * State used during display list compilation and execution.
2484  */
2485 struct mesa_list_state
2486 {
2487    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2488    GLuint CallDepth;            /**< Current recursion calling depth */
2489
2490    struct mesa_display_list *CurrentList;
2491    Node *CurrentListPtr;        /**< Head of list being compiled */
2492    GLuint CurrentListNum;       /**< Number of the list being compiled */
2493    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2494    GLuint CurrentPos;           /**< Index into current block of nodes */
2495
2496    GLvertexformat ListVtxfmt;
2497
2498    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2499    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2500
2501    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2502    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2503
2504    GLubyte ActiveIndex;
2505    GLfloat CurrentIndex;
2506
2507    GLubyte ActiveEdgeFlag;
2508    GLboolean CurrentEdgeFlag;
2509 };
2510
2511
2512 /**
2513  * Mesa rendering context.
2514  *
2515  * This is the central context data structure for Mesa.  Almost all
2516  * OpenGL state is contained in this structure.
2517  * Think of this as a base class from which device drivers will derive
2518  * sub classes.
2519  *
2520  * The GLcontext typedef names this structure.
2521  */
2522 struct __GLcontextRec
2523 {
2524    /**
2525     * \name OS related interfaces.
2526     *
2527     * These \b must be the first members of this structure, because they are
2528     * exposed to the outside world (i.e. GLX extension).
2529     */
2530    /*@{*/
2531    __GLimports imports;
2532    __GLexports exports;
2533    /*@}*/
2534
2535    /** State possibly shared with other contexts in the address space */
2536    struct gl_shared_state *Shared;
2537
2538    /** \name API function pointer tables */
2539    /*@{*/
2540    struct _glapi_table *Save;   /**< Display list save functions */
2541    struct _glapi_table *Exec;   /**< Execute functions */
2542    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2543    /*@}*/
2544
2545    GLvisual Visual;
2546    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2547    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2548
2549    /**
2550     * Device driver function pointer table
2551     */
2552    struct dd_function_table Driver;
2553
2554    void *DriverCtx;     /**< Points to device driver context/state */
2555    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2556
2557    /** Core/Driver constants */
2558    struct gl_constants Const;
2559
2560    /** \name The various 4x4 matrix stacks */
2561    /*@{*/
2562    struct matrix_stack ModelviewMatrixStack;
2563    struct matrix_stack ProjectionMatrixStack;
2564    struct matrix_stack ColorMatrixStack;
2565    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2566    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2567    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2568    /*@}*/
2569
2570    /** Combined modelview and projection matrix */
2571    GLmatrix _ModelProjectMatrix;
2572
2573    /** \name Display lists */
2574    struct mesa_list_state ListState;
2575
2576    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2577    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2578
2579    /** Extensions */
2580    struct gl_extensions Extensions;
2581
2582    /** \name Renderer attribute stack */
2583    /*@{*/
2584    GLuint AttribStackDepth;
2585    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2586    /*@}*/
2587
2588    /** \name Renderer attribute groups
2589     *
2590     * We define a struct for each attribute group to make pushing and popping
2591     * attributes easy.  Also it's a good organization.
2592     */
2593    /*@{*/
2594    struct gl_accum_attrib       Accum;          /**< Accumulation buffer attributes */
2595    struct gl_colorbuffer_attrib Color;          /**< Color buffers attributes */
2596    struct gl_current_attrib     Current;        /**< Current attributes */
2597    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2598    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2599    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2600    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2601    struct gl_light_attrib       Light;          /**< Light attributes */
2602    struct gl_line_attrib        Line;           /**< Line attributes */
2603    struct gl_list_attrib        List;           /**< List attributes */
2604    struct gl_multisample_attrib Multisample;
2605    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2606    struct gl_point_attrib       Point;          /**< Point attributes */
2607    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2608    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2609    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2610    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2611    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2612    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2613    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2614    /*@}*/
2615
2616    /** \name Client attribute stack */
2617    /*@{*/
2618    GLuint ClientAttribStackDepth;
2619    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2620    /*@}*/
2621
2622    /** \name Client attribute groups */
2623    /*@{*/
2624    struct gl_array_attrib       Array;  /**< Vertex arrays */
2625    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2626    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2627    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2628    /*@}*/
2629
2630    /** \name Other assorted state (not pushed/popped on attribute stack) */
2631    /*@{*/
2632    struct gl_histogram_attrib   Histogram;
2633    struct gl_minmax_attrib      MinMax;
2634    struct gl_convolution_attrib Convolution1D;
2635    struct gl_convolution_attrib Convolution2D;
2636    struct gl_convolution_attrib Separable2D;
2637
2638    struct gl_evaluators EvalMap;   /**< All evaluators */
2639    struct gl_feedback   Feedback;  /**< Feedback */
2640    struct gl_selection  Select;    /**< Selection */
2641
2642    struct gl_color_table ColorTable;       /**< Pre-convolution */
2643    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2644    struct gl_color_table PostConvolutionColorTable;
2645    struct gl_color_table ProxyPostConvolutionColorTable;
2646    struct gl_color_table PostColorMatrixColorTable;
2647    struct gl_color_table ProxyPostColorMatrixColorTable;
2648
2649    struct gl_program_state Program;        /**< for vertex or fragment progs */
2650    struct gl_vertex_program_state VertexProgram;   /**< GL_NV_vertex_program */
2651    struct gl_fragment_program_state FragmentProgram;  /**< GL_NV_fragment_program */
2652    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
2653
2654    struct fragment_program _TexEnvProgram;     /**< Texture state as fragment program */
2655    struct vertex_program _TnlProgram;          /**< Fixed func TNL state as vertex program */
2656
2657    GLboolean _MaintainTexEnvProgram;
2658    GLboolean _MaintainTnlProgram;
2659
2660    struct gl_occlusion_state Occlusion;  /**< GL_ARB_occlusion_query */
2661
2662    struct gl_shader_objects_state ShaderObjects;        /* GL_ARB_shader_objects */
2663    /*@}*/
2664
2665 #if FEATURE_EXT_framebuffer_object
2666    struct gl_framebuffer *CurrentFramebuffer;
2667    struct gl_renderbuffer *CurrentRenderbuffer;
2668 #endif
2669
2670    GLenum ErrorValue;        /**< Last error code */
2671    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2672    GLuint NewState;          /**< bitwise-or of _NEW_* flags */
2673
2674    /** \name Derived state */
2675    /*@{*/
2676    GLuint _TriangleCaps;      /**< bitwise-or of DD_* flags */
2677    GLuint _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2678    GLfloat _EyeZDir[3];
2679    GLfloat _ModelViewInvScale;
2680    GLuint _NeedEyeCoords;
2681    GLuint _ForceEyeCoords;
2682    GLboolean _RotateMode;
2683    GLenum _CurrentProgram;    /* currently executing program */
2684
2685    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2686    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2687    /**@}*/
2688
2689    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2690
2691
2692    GLboolean OcclusionResult;       /**< for GL_HP_occlusion_test */
2693    GLboolean OcclusionResultSaved;  /**< for GL_HP_occlusion_test */
2694    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2695                     *
2696                     * We don't have a better way to communicate this value from
2697                     * swrast_setup to swrast. */
2698
2699
2700    /** \name Z buffer stuff */
2701    /*@{*/
2702    GLuint DepthMax;     /**< Max depth buffer value */
2703    GLfloat DepthMaxF;   /**< Float max depth buffer value */
2704    GLfloat MRD;         /**< minimum resolvable difference in Z values */
2705    /*@}*/
2706
2707    /** \name Color clamping (tentative part of GL_ARB_color_clamp_control) */
2708    /*@{*/
2709    GLboolean ClampFragmentColors;
2710    GLboolean ClampVertexColors;
2711    /*@}*/
2712
2713    /** \name For debugging/development only */
2714    /*@{*/
2715    GLboolean FirstTimeCurrent;
2716    /*@}*/
2717
2718    /** Dither disable via MESA_NO_DITHER env var */
2719    GLboolean NoDither;
2720
2721    /** software compression/decompression supported or not */
2722    GLboolean Mesa_DXTn;
2723
2724    /** Core tnl module support */
2725    struct gl_tnl_module TnlModule;
2726
2727    /**
2728     * \name Hooks for module contexts.
2729     *
2730     * These will eventually live in the driver or elsewhere.
2731     */
2732    /*@{*/
2733    void *swrast_context;
2734    void *swsetup_context;
2735    void *swtnl_context;
2736    void *swtnl_im;
2737    void *acache_context;
2738    void *aelt_context;
2739    /*@}*/
2740 };
2741
2742
2743 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2744 extern const char *_mesa_prim_name[GL_POLYGON+4];
2745
2746
2747 #ifdef MESA_DEBUG
2748 extern int MESA_VERBOSE;
2749 extern int MESA_DEBUG_FLAGS;
2750 # define MESA_FUNCTION __FUNCTION__
2751 #else
2752 # define MESA_VERBOSE 0
2753 # define MESA_DEBUG_FLAGS 0
2754 # define MESA_FUNCTION "a function"
2755 # ifndef NDEBUG
2756 #  define NDEBUG
2757 # endif
2758 #endif
2759
2760
2761 enum _verbose
2762 {
2763    VERBOSE_VARRAY               = 0x0001,
2764    VERBOSE_TEXTURE              = 0x0002,
2765    VERBOSE_IMMEDIATE            = 0x0004,
2766    VERBOSE_PIPELINE             = 0x0008,
2767    VERBOSE_DRIVER               = 0x0010,
2768    VERBOSE_STATE                = 0x0020,
2769    VERBOSE_API                  = 0x0040,
2770    VERBOSE_DISPLAY_LIST         = 0x0100,
2771    VERBOSE_LIGHTING             = 0x0200,
2772    VERBOSE_PRIMS                = 0x0400,
2773    VERBOSE_VERTS                = 0x0800
2774 };
2775
2776
2777 enum _debug
2778 {
2779    DEBUG_ALWAYS_FLUSH           = 0x1
2780 };
2781
2782
2783
2784 #define Elements(x) sizeof(x)/sizeof(*(x))
2785
2786
2787 #endif /* TYPES_H */