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 #if ACCUM_BITS != 16
  69 /* Software accum done with GLshort at this time */
  70 #  error "illegal number of accumulation bits"
  71 #endif
  72
  73
  74 /**
  75  * Stencil buffer data type.
  76  */
  77 #if STENCIL_BITS==8
  78    typedef GLubyte GLstencil;
  79 #  define STENCIL_MAX 0xff
  80 #elif STENCIL_BITS==16
  81    typedef GLushort GLstencil;
  82 #  define STENCIL_MAX 0xffff
  83 #else
  84 #  error "illegal number of stencil bits"
  85 #endif
  86
  87
  88 /**
  89  * Used for storing intermediate depth buffer values.
  90  * The actual depth/Z buffer might use 16 or 32-bit values.
  91  *
  92  * \note Must be 32-bits!
  93  */
  94 typedef GLuint GLdepth;
  95
  96
  97 /**
  98  * Fixed point data type.
  99  */
 100 typedef int GLfixed;
 101 /*
 102  * Fixed point arithmetic macros
 103  */
 104 #ifndef FIXED_FRAC_BITS
 105 #define FIXED_FRAC_BITS 11
 106 #endif
 107
 108 #define FIXED_SHIFT     FIXED_FRAC_BITS
 109 #define FIXED_ONE       (1 << FIXED_SHIFT)
 110 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
 111 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
 112 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
 113 #define FIXED_EPSILON   1
 114 #define FIXED_SCALE     ((float) FIXED_ONE)
 115 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 116 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 117 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 118 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 119 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 120 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 121 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 122 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 123 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 124 #define PosFloatToFixed(X)      FloatToFixed(X)
 125 #define SignedFloatToFixed(X)   FloatToFixed(X)
 126
 127
 128
 129 /**
 130  * \name Some forward type declarations
 131  */
 132 /*@{*/
 133 struct _mesa_HashTable;
 134 struct gl_pixelstore_attrib;
 135 struct gl_texture_format;
 136 struct gl_texture_image;
 137 struct gl_texture_object;
 138 typedef struct __GLcontextRec GLcontext;
 139 typedef struct __GLcontextModesRec GLvisual;
 140 typedef struct gl_framebuffer GLframebuffer;
 141 /*@}*/
 142
 143
 144
 145 /**
 146  * Indexes for vertex program attributes.
 147  * GL_NV_vertex_program aliases generic attributes over the conventional
 148  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 149  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 150  * generic attributes are distinct/separate).
 151  */
 152 enum
 153 {
 154    VERT_ATTRIB_POS = 0,
 155    VERT_ATTRIB_WEIGHT = 1,
 156    VERT_ATTRIB_NORMAL = 2,
 157    VERT_ATTRIB_COLOR0 = 3,
 158    VERT_ATTRIB_COLOR1 = 4,
 159    VERT_ATTRIB_FOG = 5,
 160    VERT_ATTRIB_SIX = 6,
 161    VERT_ATTRIB_SEVEN = 7,
 162    VERT_ATTRIB_TEX0 = 8,
 163    VERT_ATTRIB_TEX1 = 9,
 164    VERT_ATTRIB_TEX2 = 10,
 165    VERT_ATTRIB_TEX3 = 11,
 166    VERT_ATTRIB_TEX4 = 12,
 167    VERT_ATTRIB_TEX5 = 13,
 168    VERT_ATTRIB_TEX6 = 14,
 169    VERT_ATTRIB_TEX7 = 15,
 170    VERT_ATTRIB_GENERIC0 = 16,
 171    VERT_ATTRIB_GENERIC1 = 17,
 172    VERT_ATTRIB_GENERIC2 = 18,
 173    VERT_ATTRIB_GENERIC3 = 19,
 174    VERT_ATTRIB_MAX = 16
 175 };
 176
 177 /**
 178  * Bitflags for vertex attributes.
 179  * These are used in bitfields in many places.
 180  */
 181 /*@{*/
 182 #define VERT_BIT_POS      (1 << VERT_ATTRIB_POS)
 183 #define VERT_BIT_WEIGHT   (1 << VERT_ATTRIB_WEIGHT)
 184 #define VERT_BIT_NORMAL   (1 << VERT_ATTRIB_NORMAL)
 185 #define VERT_BIT_COLOR0   (1 << VERT_ATTRIB_COLOR0)
 186 #define VERT_BIT_COLOR1   (1 << VERT_ATTRIB_COLOR1)
 187 #define VERT_BIT_FOG      (1 << VERT_ATTRIB_FOG)
 188 #define VERT_BIT_SIX      (1 << VERT_ATTRIB_SIX)
 189 #define VERT_BIT_SEVEN    (1 << VERT_ATTRIB_SEVEN)
 190 #define VERT_BIT_TEX0     (1 << VERT_ATTRIB_TEX0)
 191 #define VERT_BIT_TEX1     (1 << VERT_ATTRIB_TEX1)
 192 #define VERT_BIT_TEX2     (1 << VERT_ATTRIB_TEX2)
 193 #define VERT_BIT_TEX3     (1 << VERT_ATTRIB_TEX3)
 194 #define VERT_BIT_TEX4     (1 << VERT_ATTRIB_TEX4)
 195 #define VERT_BIT_TEX5     (1 << VERT_ATTRIB_TEX5)
 196 #define VERT_BIT_TEX6     (1 << VERT_ATTRIB_TEX6)
 197 #define VERT_BIT_TEX7     (1 << VERT_ATTRIB_TEX7)
 198 #define VERT_BIT_GENERIC0 (1 << VERT_ATTRIB_GENERIC0)
 199 #define VERT_BIT_GENERIC1 (1 << VERT_ATTRIB_GENERIC1)
 200 #define VERT_BIT_GENERIC2 (1 << VERT_ATTRIB_GENERIC2)
 201 #define VERT_BIT_GENERIC3 (1 << VERT_ATTRIB_GENERIC3)
 202
 203 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 204 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 205 /*@}*/
 206
 207
 208 /**
 209  * Indexes for vertex program result attributes
 210  */
 211 #define VERT_RESULT_HPOS 0
 212 #define VERT_RESULT_COL0 1
 213 #define VERT_RESULT_COL1 2
 214 #define VERT_RESULT_BFC0 3
 215 #define VERT_RESULT_BFC1 4
 216 #define VERT_RESULT_FOGC 5
 217 #define VERT_RESULT_PSIZ 6
 218 #define VERT_RESULT_TEX0 7
 219 #define VERT_RESULT_TEX1 8
 220 #define VERT_RESULT_TEX2 9
 221 #define VERT_RESULT_TEX3 10
 222 #define VERT_RESULT_TEX4 11
 223 #define VERT_RESULT_TEX5 12
 224 #define VERT_RESULT_TEX6 13
 225 #define VERT_RESULT_TEX7 14
 226 #define VERT_RESULT_MAX  15
 227
 228
 229 /**
 230  * Indexes for fragment program input attributes.
 231  */
 232 enum
 233 {
 234    FRAG_ATTRIB_WPOS = 0,
 235    FRAG_ATTRIB_COL0 = 1,
 236    FRAG_ATTRIB_COL1 = 2,
 237    FRAG_ATTRIB_FOGC = 3,
 238    FRAG_ATTRIB_TEX0 = 4,
 239    FRAG_ATTRIB_TEX1 = 5,
 240    FRAG_ATTRIB_TEX2 = 6,
 241    FRAG_ATTRIB_TEX3 = 7,
 242    FRAG_ATTRIB_TEX4 = 8,
 243    FRAG_ATTRIB_TEX5 = 9,
 244    FRAG_ATTRIB_TEX6 = 10,
 245    FRAG_ATTRIB_TEX7 = 11
 246 };
 247
 248 /*
 249  * Bitflags for fragment attributes.
 250  */
 251 /*@{*/
 252 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 253 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 254 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 255 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 256 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 257 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 258 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 259 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 260 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 261 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 262 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 263 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 264
 265 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 266                            FRAG_BIT_TEX1|       \
 267                            FRAG_BIT_TEX2|       \
 268                            FRAG_BIT_TEX3|       \
 269                            FRAG_BIT_TEX4|       \
 270                            FRAG_BIT_TEX5|       \
 271                            FRAG_BIT_TEX6|       \
 272                            FRAG_BIT_TEX7)
 273 /*@}*/
 274
 275
 276 /**
 277  * Indexes for all renderbuffers
 278  */
 279 enum {
 280    BUFFER_FRONT_LEFT  = 0,  /* the four standard color buffers */
 281    BUFFER_BACK_LEFT   = 1,
 282    BUFFER_FRONT_RIGHT = 2,
 283    BUFFER_BACK_RIGHT  = 3,
 284    BUFFER_AUX0        = 4,  /* optional aux buffer */
 285    BUFFER_AUX1        = 5,
 286    BUFFER_AUX2        = 6,
 287    BUFFER_AUX3        = 7,
 288    BUFFER_DEPTH       = 8,
 289    BUFFER_STENCIL     = 9,
 290    BUFFER_ACCUM       = 10,
 291    BUFFER_COLOR0      = 11, /* generic renderbuffers */
 292    BUFFER_COLOR1      = 12,
 293    BUFFER_COLOR2      = 13,
 294    BUFFER_COLOR3      = 14,
 295    BUFFER_COLOR4      = 15,
 296    BUFFER_COLOR5      = 16,
 297    BUFFER_COLOR6      = 17,
 298    BUFFER_COLOR7      = 18,
 299    BUFFER_COUNT       = 19
 300 };
 301
 302 /**
 303  * Bit flags for all renderbuffers
 304  */
 305 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 306 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 307 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 308 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 309 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 310 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 311 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 312 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 313 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 314 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 315 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 316 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 317 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 318 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 319 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 320 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 321 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 322 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 323 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 324
 325
 326 /**
 327  * Data structure for color tables
 328  */
 329 struct gl_color_table
 330 {
 331    GLenum Format;         /**< GL_ALPHA, GL_RGB, GL_RGB, etc */
 332    GLenum IntFormat;
 333    GLuint Size;           /**< number of entries (rows) in table */
 334    GLvoid *Table;         /**< points to data of <Type> */
 335    GLenum Type;           /**< GL_UNSIGNED_BYTE or GL_FLOAT */
 336    GLubyte RedSize;
 337    GLubyte GreenSize;
 338    GLubyte BlueSize;
 339    GLubyte AlphaSize;
 340    GLubyte LuminanceSize;
 341    GLubyte IntensitySize;
 342 };
 343
 344
 345 /**
 346  * \name Bit flags used for updating material values.
 347  */
 348 /*@{*/
 349 #define MAT_ATTRIB_FRONT_AMBIENT           0
 350 #define MAT_ATTRIB_BACK_AMBIENT            1
 351 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 352 #define MAT_ATTRIB_BACK_DIFFUSE            3
 353 #define MAT_ATTRIB_FRONT_SPECULAR          4
 354 #define MAT_ATTRIB_BACK_SPECULAR           5
 355 #define MAT_ATTRIB_FRONT_EMISSION          6
 356 #define MAT_ATTRIB_BACK_EMISSION           7
 357 #define MAT_ATTRIB_FRONT_SHININESS         8
 358 #define MAT_ATTRIB_BACK_SHININESS          9
 359 #define MAT_ATTRIB_FRONT_INDEXES           10
 360 #define MAT_ATTRIB_BACK_INDEXES            11
 361 #define MAT_ATTRIB_MAX                     12
 362
 363 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 364 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 365 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 366 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 367 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 368 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 369
 370 #define MAT_INDEX_AMBIENT  0
 371 #define MAT_INDEX_DIFFUSE  1
 372 #define MAT_INDEX_SPECULAR 2
 373
 374 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 375 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 376 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 377 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 378 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 379 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 380 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 381 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 382 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 383 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 384 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 385 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 386
 387
 388 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 389                                  MAT_BIT_FRONT_AMBIENT |        \
 390                                  MAT_BIT_FRONT_DIFFUSE |        \
 391                                  MAT_BIT_FRONT_SPECULAR |       \
 392                                  MAT_BIT_FRONT_SHININESS |      \
 393                                  MAT_BIT_FRONT_INDEXES)
 394
 395 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 396                                  MAT_BIT_BACK_AMBIENT |         \
 397                                  MAT_BIT_BACK_DIFFUSE |         \
 398                                  MAT_BIT_BACK_SPECULAR |        \
 399                                  MAT_BIT_BACK_SHININESS |       \
 400                                  MAT_BIT_BACK_INDEXES)
 401
 402 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 403 /*@}*/
 404
 405
 406 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 407 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 408
 409 /**
 410  * Material shininess lookup table.
 411  */
 412 struct gl_shine_tab
 413 {
 414    struct gl_shine_tab *next, *prev;
 415    GLfloat tab[SHINE_TABLE_SIZE+1];
 416    GLfloat shininess;
 417    GLuint refcount;
 418 };
 419
 420
 421 /**
 422  * Light source state.
 423  */
 424 struct gl_light
 425 {
 426    struct gl_light *next;       /**< double linked list with sentinel */
 427    struct gl_light *prev;
 428
 429    GLfloat Ambient[4];          /**< ambient color */
 430    GLfloat Diffuse[4];          /**< diffuse color */
 431    GLfloat Specular[4];         /**< specular color */
 432    GLfloat EyePosition[4];      /**< position in eye coordinates */
 433    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 434    GLfloat SpotExponent;
 435    GLfloat SpotCutoff;          /**< in degrees */
 436    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 437    GLfloat ConstantAttenuation;
 438    GLfloat LinearAttenuation;
 439    GLfloat QuadraticAttenuation;
 440    GLboolean Enabled;           /**< On/off flag */
 441
 442    /**
 443     * \name Derived fields
 444     */
 445    /*@{*/
 446    GLuint _Flags;               /**< State */
 447
 448    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 449    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 450    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 451    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 452    GLfloat _VP_inf_spot_attenuation;
 453
 454    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 455    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 456    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 457    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 458    GLfloat _dli;                /**< CI diffuse light intensity */
 459    GLfloat _sli;                /**< CI specular light intensity */
 460    /*@}*/
 461 };
 462
 463
 464 /**
 465  * Light model state.
 466  */
 467 struct gl_lightmodel
 468 {
 469    GLfloat Ambient[4];          /**< ambient color */
 470    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 471    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 472    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 473                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 474 };
 475
 476
 477 /**
 478  * Material state.
 479  */
 480 struct gl_material
 481 {
 482    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 483 };
 484
 485
 486 /**
 487  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 488  */
 489 struct gl_accum_attrib
 490 {
 491    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 492 };
 493
 494
 495 /**
 496  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 497  */
 498 struct gl_colorbuffer_attrib
 499 {
 500    GLuint ClearIndex;                   /**< Index to use for glClear */
 501    GLclampf ClearColor[4];              /**< Color to use for glClear */
 502
 503    GLuint IndexMask;                    /**< Color index write mask */
 504    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 505
 506    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 507
 508    /**
 509     * \name alpha testing
 510     */
 511    /*@{*/
 512    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 513    GLenum AlphaFunc;                    /**< Alpha test function */
 514    GLclampf AlphaRef;                   /**< Alpha reference value */
 515    /*@}*/
 516
 517    /**
 518     * \name Blending
 519     */
 520    /*@{*/
 521    GLboolean BlendEnabled;              /**< Blending enabled flag */
 522    GLenum BlendSrcRGB;                  /**< Blending source operator */
 523    GLenum BlendDstRGB;                  /**< Blending destination operator */
 524    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 525    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 526    GLenum BlendEquationRGB;             /**< Blending equation */
 527    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 528    GLfloat BlendColor[4];               /**< Blending color */
 529    /*@}*/
 530
 531    /**
 532     * \name Logic op
 533     */
 534    /*@{*/
 535    GLenum LogicOp;                      /**< Logic operator */
 536    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 537    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 538    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 539    /*@}*/
 540
 541    GLboolean DitherFlag;                /**< Dither enable flag */
 542 };
 543
 544
 545 /**
 546  * Current attribute group (GL_CURRENT_BIT).
 547  */
 548 struct gl_current_attrib
 549 {
 550    /**
 551     * \name Values valid only when FLUSH_VERTICES has been called.
 552     */
 553    /*@{*/
 554    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 555                                                   *  indexed by VERT_ATTRIB_* */
 556    GLfloat Index;                               /**< Current color index */
 557    GLboolean EdgeFlag;                          /**< Current edge flag */
 558    /*@}*/
 559
 560    /**
 561     * \name Values are always valid.
 562     *
 563     * \note BTW, note how similar this set of attributes is to the SWvertex
 564     * data type in the software rasterizer...
 565     */
 566    /*@{*/
 567    GLfloat RasterPos[4];                        /**< Current raster position */
 568    GLfloat RasterDistance;                      /**< Current raster distance */
 569    GLfloat RasterColor[4];                      /**< Current raster color */
 570    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 571    GLfloat RasterIndex;                         /**< Current raster index */
 572    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 573    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 574    /*@}*/
 575 };
 576
 577
 578 /**
 579  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 580  */
 581 struct gl_depthbuffer_attrib
 582 {
 583    GLenum Func;                 /**< Function for depth buffer compare */
 584    GLclampd Clear;              /**< Value to clear depth buffer to */
 585    GLboolean Test;              /**< Depth buffering enabled flag */
 586    GLboolean Mask;              /**< Depth buffer writable? */
 587    GLboolean OcclusionTest;     /**< GL_HP_occlusion_test */
 588    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 589    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 590 };
 591
 592
 593 /**
 594  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
 595  */
 596 struct gl_enable_attrib
 597 {
 598    GLboolean AlphaTest;
 599    GLboolean AutoNormal;
 600    GLboolean Blend;
 601    GLuint ClipPlanes;
 602    GLboolean ColorMaterial;
 603    GLboolean ColorTable;                /* SGI_color_table */
 604    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 605    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 606    GLboolean Convolution1D;
 607    GLboolean Convolution2D;
 608    GLboolean Separable2D;
 609    GLboolean CullFace;
 610    GLboolean DepthTest;
 611    GLboolean Dither;
 612    GLboolean Fog;
 613    GLboolean Histogram;
 614    GLboolean Light[MAX_LIGHTS];
 615    GLboolean Lighting;
 616    GLboolean LineSmooth;
 617    GLboolean LineStipple;
 618    GLboolean IndexLogicOp;
 619    GLboolean ColorLogicOp;
 620    GLboolean Map1Color4;
 621    GLboolean Map1Index;
 622    GLboolean Map1Normal;
 623    GLboolean Map1TextureCoord1;
 624    GLboolean Map1TextureCoord2;
 625    GLboolean Map1TextureCoord3;
 626    GLboolean Map1TextureCoord4;
 627    GLboolean Map1Vertex3;
 628    GLboolean Map1Vertex4;
 629    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 630    GLboolean Map2Color4;
 631    GLboolean Map2Index;
 632    GLboolean Map2Normal;
 633    GLboolean Map2TextureCoord1;
 634    GLboolean Map2TextureCoord2;
 635    GLboolean Map2TextureCoord3;
 636    GLboolean Map2TextureCoord4;
 637    GLboolean Map2Vertex3;
 638    GLboolean Map2Vertex4;
 639    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 640    GLboolean MinMax;
 641    GLboolean Normalize;
 642    GLboolean PixelTexture;
 643    GLboolean PointSmooth;
 644    GLboolean PolygonOffsetPoint;
 645    GLboolean PolygonOffsetLine;
 646    GLboolean PolygonOffsetFill;
 647    GLboolean PolygonSmooth;
 648    GLboolean PolygonStipple;
 649    GLboolean RescaleNormals;
 650    GLboolean Scissor;
 651    GLboolean Stencil;
 652    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 653    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 654    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 655    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 656    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 657    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 658    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 659    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 660    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 661    /* SGI_texture_color_table */
 662    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 663    /* GL_NV_vertex_program */
 664    GLboolean VertexProgram;
 665    GLboolean VertexProgramPointSize;
 666    GLboolean VertexProgramTwoSide;
 667    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 668    GLboolean PointSprite;
 669    GLboolean FragmentShaderATI;
 670 };
 671
 672
 673 /**
 674  * Evaluator attribute group (GL_EVAL_BIT).
 675  */
 676 struct gl_eval_attrib
 677 {
 678    /**
 679     * \name Enable bits
 680     */
 681    /*@{*/
 682    GLboolean Map1Color4;
 683    GLboolean Map1Index;
 684    GLboolean Map1Normal;
 685    GLboolean Map1TextureCoord1;
 686    GLboolean Map1TextureCoord2;
 687    GLboolean Map1TextureCoord3;
 688    GLboolean Map1TextureCoord4;
 689    GLboolean Map1Vertex3;
 690    GLboolean Map1Vertex4;
 691    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 692    GLboolean Map2Color4;
 693    GLboolean Map2Index;
 694    GLboolean Map2Normal;
 695    GLboolean Map2TextureCoord1;
 696    GLboolean Map2TextureCoord2;
 697    GLboolean Map2TextureCoord3;
 698    GLboolean Map2TextureCoord4;
 699    GLboolean Map2Vertex3;
 700    GLboolean Map2Vertex4;
 701    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 702    GLboolean AutoNormal;
 703    /*@}*/
 704
 705    /**
 706     * \name Map Grid endpoints and divisions and calculated du values
 707     */
 708    /*@{*/
 709    GLint MapGrid1un;
 710    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 711    GLint MapGrid2un, MapGrid2vn;
 712    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 713    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 714    /*@}*/
 715 };
 716
 717
 718 /**
 719  * Fog attribute group (GL_FOG_BIT).
 720  */
 721 struct gl_fog_attrib
 722 {
 723    GLboolean Enabled;           /**< Fog enabled flag */
 724    GLfloat Color[4];            /**< Fog color */
 725    GLfloat Density;             /**< Density >= 0.0 */
 726    GLfloat Start;               /**< Start distance in eye coords */
 727    GLfloat End;                 /**< End distance in eye coords */
 728    GLfloat Index;               /**< Fog index */
 729    GLenum Mode;                 /**< Fog mode */
 730    GLboolean ColorSumEnabled;
 731    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 732 };
 733
 734
 735 /**
 736  * Hint attribute group (GL_HINT_BIT).
 737  *
 738  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 739  */
 740 struct gl_hint_attrib
 741 {
 742    GLenum PerspectiveCorrection;
 743    GLenum PointSmooth;
 744    GLenum LineSmooth;
 745    GLenum PolygonSmooth;
 746    GLenum Fog;
 747    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 748    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 749    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 750    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 751 };
 752
 753
 754 /**
 755  * Histogram attributes.
 756  */
 757 struct gl_histogram_attrib
 758 {
 759    GLuint Width;                                /**< number of table entries */
 760    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 761    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 762    GLboolean Sink;                              /**< terminate image transfer? */
 763    GLubyte RedSize;                             /**< Bits per counter */
 764    GLubyte GreenSize;
 765    GLubyte BlueSize;
 766    GLubyte AlphaSize;
 767    GLubyte LuminanceSize;
 768 };
 769
 770
 771 /**
 772  * Color Min/max state.
 773  */
 774 struct gl_minmax_attrib
 775 {
 776    GLenum Format;
 777    GLboolean Sink;
 778    GLfloat Min[4], Max[4];   /**< RGBA */
 779 };
 780
 781
 782 /**
 783  * Image convolution state.
 784  */
 785 struct gl_convolution_attrib
 786 {
 787    GLenum Format;
 788    GLenum InternalFormat;
 789    GLuint Width;
 790    GLuint Height;
 791    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 792 };
 793
 794
 795 /**
 796  * Light state flags.
 797  */
 798 /*@{*/
 799 #define LIGHT_SPOT         0x1
 800 #define LIGHT_LOCAL_VIEWER 0x2
 801 #define LIGHT_POSITIONAL   0x4
 802 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 803 /*@}*/
 804
 805
 806 /**
 807  * Lighting attribute group (GL_LIGHT_BIT).
 808  */
 809 struct gl_light_attrib
 810 {
 811    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 812    struct gl_lightmodel Model;          /**< Lighting model */
 813
 814    /**
 815     * Must flush FLUSH_VERTICES before referencing:
 816     */
 817    /*@{*/
 818    struct gl_material Material;         /**< Includes front & back values */
 819    /*@}*/
 820
 821    GLboolean Enabled;                   /**< Lighting enabled flag */
 822    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 823    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 824    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 825    GLuint ColorMaterialBitmask;         /**< bitmask formed from Face and Mode */
 826    GLboolean ColorMaterialEnabled;
 827
 828    struct gl_light EnabledList;         /**< List sentinel */
 829
 830    /**
 831     * Derived state for optimizations:
 832     */
 833    /*@{*/
 834    GLboolean _NeedEyeCoords;
 835    GLboolean _NeedVertices;             /**< Use fast shader? */
 836    GLuint  _Flags;                      /**< LIGHT_* flags, see above */
 837    GLfloat _BaseColor[2][3];
 838    /*@}*/
 839 };
 840
 841
 842 /**
 843  * Line attribute group (GL_LINE_BIT).
 844  */
 845 struct gl_line_attrib
 846 {
 847    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 848    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 849    GLushort StipplePattern;     /**< Stipple pattern */
 850    GLint StippleFactor;         /**< Stipple repeat factor */
 851    GLfloat Width;               /**< Line width */
 852    GLfloat _Width;              /**< Clamped Line width */
 853 };
 854
 855
 856 /**
 857  * Display list attribute group (GL_LIST_BIT).
 858  */
 859 struct gl_list_attrib
 860 {
 861    GLuint ListBase;
 862 };
 863
 864
 865 /**
 866  * Used by device drivers to hook new commands into display lists.
 867  */
 868 struct gl_list_instruction
 869 {
 870    GLuint Size;
 871    void (*Execute)( GLcontext *ctx, void *data );
 872    void (*Destroy)( GLcontext *ctx, void *data );
 873    void (*Print)( GLcontext *ctx, void *data );
 874 };
 875
 876 #define MAX_DLIST_EXT_OPCODES 16
 877
 878 /**
 879  * Used by device drivers to hook new commands into display lists.
 880  */
 881 struct gl_list_extensions
 882 {
 883    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 884    GLuint NumOpcodes;
 885 };
 886
 887
 888 /**
 889  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 890  */
 891 struct gl_multisample_attrib
 892 {
 893    GLboolean Enabled;
 894    GLboolean SampleAlphaToCoverage;
 895    GLboolean SampleAlphaToOne;
 896    GLboolean SampleCoverage;
 897    GLfloat SampleCoverageValue;
 898    GLboolean SampleCoverageInvert;
 899 };
 900
 901
 902 /**
 903  * Pixel attribute group (GL_PIXEL_MODE_BIT).
 904  */
 905 struct gl_pixel_attrib
 906 {
 907    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
 908    GLfloat RedBias, RedScale;
 909    GLfloat GreenBias, GreenScale;
 910    GLfloat BlueBias, BlueScale;
 911    GLfloat AlphaBias, AlphaScale;
 912    GLfloat DepthBias, DepthScale;
 913    GLint IndexShift, IndexOffset;
 914    GLboolean MapColorFlag;
 915    GLboolean MapStencilFlag;
 916    GLfloat ZoomX, ZoomY;
 917    /* XXX move these out of gl_pixel_attrib */
 918    GLint MapStoSsize;           /**< Size of each pixel map */
 919    GLint MapItoIsize;
 920    GLint MapItoRsize;
 921    GLint MapItoGsize;
 922    GLint MapItoBsize;
 923    GLint MapItoAsize;
 924    GLint MapRtoRsize;
 925    GLint MapGtoGsize;
 926    GLint MapBtoBsize;
 927    GLint MapAtoAsize;
 928    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 929    GLint MapItoI[MAX_PIXEL_MAP_TABLE];
 930    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 931    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 932    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 933    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 934    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 935    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 936    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 937    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 938    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 939    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 940    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 941    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 942    /** GL_EXT_histogram */
 943    GLboolean HistogramEnabled;
 944    GLboolean MinMaxEnabled;
 945    /** GL_SGIS_pixel_texture */
 946    GLboolean PixelTextureEnabled;
 947    GLenum FragmentRgbSource;
 948    GLenum FragmentAlphaSource;
 949    /** GL_SGI_color_matrix */
 950    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 951    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 952    /** GL_SGI_color_table */
 953    GLfloat ColorTableScale[4];
 954    GLfloat ColorTableBias[4];
 955    GLboolean ColorTableEnabled;
 956    GLfloat PCCTscale[4];
 957    GLfloat PCCTbias[4];
 958    GLboolean PostConvolutionColorTableEnabled;
 959    GLfloat PCMCTscale[4];
 960    GLfloat PCMCTbias[4];
 961    GLboolean PostColorMatrixColorTableEnabled;
 962    /** GL_SGI_texture_color_table */
 963    GLfloat TextureColorTableScale[4];
 964    GLfloat TextureColorTableBias[4];
 965    /** Convolution */
 966    GLboolean Convolution1DEnabled;
 967    GLboolean Convolution2DEnabled;
 968    GLboolean Separable2DEnabled;
 969    GLfloat ConvolutionBorderColor[3][4];
 970    GLenum ConvolutionBorderMode[3];
 971    GLfloat ConvolutionFilterScale[3][4];
 972    GLfloat ConvolutionFilterBias[3][4];
 973    GLfloat PostConvolutionScale[4];  /**< RGBA */
 974    GLfloat PostConvolutionBias[4];   /**< RGBA */
 975 };
 976
 977
 978 /**
 979  * Point attribute group (GL_POINT_BIT).
 980  */
 981 struct gl_point_attrib
 982 {
 983    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 984    GLfloat Size;                /**< User-specified point size */
 985    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
 986    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 987    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 988    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 989    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 990    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
 991    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV/ARB_point_sprite */
 992    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 993    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
 994 };
 995
 996
 997 /**
 998  * Polygon attribute group (GL_POLYGON_BIT).
 999  */
1000 struct gl_polygon_attrib
1001 {
1002    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1003    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1004    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1005    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1006    GLboolean CullFlag;          /**< Culling on/off flag */
1007    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1008    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1009    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1010    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1011    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1012    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1013    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1014    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1015 };
1016
1017
1018 /**
1019  * Scissor attributes (GL_SCISSOR_BIT).
1020  */
1021 struct gl_scissor_attrib
1022 {
1023    GLboolean Enabled;           /**< Scissor test enabled? */
1024    GLint X, Y;                  /**< Lower left corner of box */
1025    GLsizei Width, Height;       /**< Size of box */
1026 };
1027
1028
1029 /**
1030  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1031  */
1032 struct gl_stencil_attrib
1033 {
1034    GLboolean Enabled;           /**< Enabled flag */
1035    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1036    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1037    GLenum Function[2];          /**< Stencil function */
1038    GLenum FailFunc[2];          /**< Fail function */
1039    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1040    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1041    GLstencil Ref[2];            /**< Reference value */
1042    GLstencil ValueMask[2];      /**< Value mask */
1043    GLstencil WriteMask[2];      /**< Write mask */
1044    GLstencil Clear;             /**< Clear value */
1045 };
1046
1047
1048 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
1049
1050 /**
1051  * An index for each type of texture object
1052  */
1053 /*@{*/
1054 #define TEXTURE_1D_INDEX    0
1055 #define TEXTURE_2D_INDEX    1
1056 #define TEXTURE_3D_INDEX    2
1057 #define TEXTURE_CUBE_INDEX  3
1058 #define TEXTURE_RECT_INDEX  4
1059 /*@}*/
1060
1061 /**
1062  * Bit flags for each type of texture object
1063  * Used for Texture.Unit[]._ReallyEnabled flags.
1064  */
1065 /*@{*/
1066 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
1067 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
1068 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
1069 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
1070 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
1071 /*@}*/
1072
1073
1074 /**
1075  * TexGenEnabled flags.
1076  */
1077 /*@{*/
1078 #define S_BIT 1
1079 #define T_BIT 2
1080 #define R_BIT 4
1081 #define Q_BIT 8
1082 /*@}*/
1083
1084
1085 /**
1086  * Bit flag versions of the corresponding GL_ constants.
1087  */
1088 /*@{*/
1089 #define TEXGEN_SPHERE_MAP        0x1
1090 #define TEXGEN_OBJ_LINEAR        0x2
1091 #define TEXGEN_EYE_LINEAR        0x4
1092 #define TEXGEN_REFLECTION_MAP_NV 0x8
1093 #define TEXGEN_NORMAL_MAP_NV     0x10
1094
1095 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1096                                   TEXGEN_REFLECTION_MAP_NV | \
1097                                   TEXGEN_NORMAL_MAP_NV)
1098 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1099                                   TEXGEN_REFLECTION_MAP_NV | \
1100                                   TEXGEN_NORMAL_MAP_NV     | \
1101                                   TEXGEN_EYE_LINEAR)
1102 /*@}*/
1103
1104
1105 /* A selection of state flags to make driver and module's lives easier. */
1106 #define ENABLE_TEXGEN0        0x1
1107 #define ENABLE_TEXGEN1        0x2
1108 #define ENABLE_TEXGEN2        0x4
1109 #define ENABLE_TEXGEN3        0x8
1110 #define ENABLE_TEXGEN4        0x10
1111 #define ENABLE_TEXGEN5        0x20
1112 #define ENABLE_TEXGEN6        0x40
1113 #define ENABLE_TEXGEN7        0x80
1114
1115 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1116 #define ENABLE_TEXMAT1        0x2
1117 #define ENABLE_TEXMAT2        0x4
1118 #define ENABLE_TEXMAT3        0x8
1119 #define ENABLE_TEXMAT4        0x10
1120 #define ENABLE_TEXMAT5        0x20
1121 #define ENABLE_TEXMAT6        0x40
1122 #define ENABLE_TEXMAT7        0x80
1123
1124 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1125 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1126
1127
1128 /**
1129  * Texel fetch function prototype.  We use texel fetch functions to
1130  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1131  * texture images.  These functions help to isolate us from the gritty
1132  * details of all the various texture image encodings.
1133  *
1134  * \param texImage texture image.
1135  * \param col texel column.
1136  * \param row texel row.
1137  * \param img texel image level/layer.
1138  * \param texelOut output texel (up to 4 GLchans)
1139  */
1140 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1141                                  GLint col, GLint row, GLint img,
1142                                  GLchan *texelOut );
1143
1144 /**
1145  * As above, but returns floats.
1146  * Used for depth component images and for upcoming signed/float
1147  * texture images.
1148  */
1149 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1150                                  GLint col, GLint row, GLint img,
1151                                  GLfloat *texelOut );
1152
1153
1154 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1155                                GLint col, GLint row, GLint img,
1156                                const void *texel);
1157
1158 /**
1159  * TexImage store function.  This is called by the glTex[Sub]Image
1160  * functions and is responsible for converting the user-specified texture
1161  * image into a specific (hardware) image format.
1162  */
1163 typedef GLboolean (*StoreTexImageFunc)(GLcontext *ctx, GLuint dims,
1164                           GLenum baseInternalFormat,
1165                           const struct gl_texture_format *dstFormat,
1166                           GLvoid *dstAddr,
1167                           GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
1168                           GLint dstRowStride, GLint dstImageStride,
1169                           GLint srcWidth, GLint srcHeight, GLint srcDepth,
1170                           GLenum srcFormat, GLenum srcType,
1171                           const GLvoid *srcAddr,
1172                           const struct gl_pixelstore_attrib *srcPacking);
1173
1174
1175
1176 /**
1177  * Texture format record
1178  */
1179 struct gl_texture_format
1180 {
1181    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1182
1183    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1184                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1185                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1186                                  *   GL_DEPTH_COMPONENT.
1187                                  */
1188    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1189    GLubyte RedBits;             /**< Bits per texel component */
1190    GLubyte GreenBits;           /**< These are just rough approximations for */
1191    GLubyte BlueBits;            /**< compressed texture formats. */
1192    GLubyte AlphaBits;
1193    GLubyte LuminanceBits;
1194    GLubyte IntensityBits;
1195    GLubyte IndexBits;
1196    GLubyte DepthBits;
1197
1198    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1199
1200    StoreTexImageFunc StoreImage;
1201
1202    /**
1203     * \name Texel fetch function pointers
1204     */
1205    /*@{*/
1206    FetchTexelFuncC FetchTexel1D;
1207    FetchTexelFuncC FetchTexel2D;
1208    FetchTexelFuncC FetchTexel3D;
1209    FetchTexelFuncF FetchTexel1Df;
1210    FetchTexelFuncF FetchTexel2Df;
1211    FetchTexelFuncF FetchTexel3Df;
1212    /*@}*/
1213
1214    StoreTexelFunc StoreTexel;
1215 };
1216
1217
1218 /**
1219  * Texture image state.  Describes the dimensions of a texture image,
1220  * the texel format and pointers to Texel Fetch functions.
1221  */
1222 struct gl_texture_image
1223 {
1224    GLenum Format;               /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1225                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1226                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1227                                  *   GL_DEPTH_COMPONENT only.
1228                                  *   Used for choosing TexEnv arithmetic.
1229                                  */
1230    GLint IntFormat;             /**< Internal format as given by the user */
1231    GLuint Border;               /**< 0 or 1 */
1232    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1233    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1234    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1235    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1236    GLuint Width2;               /**< = Width - 2*Border */
1237    GLuint Height2;              /**< = Height - 2*Border */
1238    GLuint Depth2;               /**< = Depth - 2*Border */
1239    GLuint WidthLog2;            /**< = log2(Width2) */
1240    GLuint HeightLog2;           /**< = log2(Height2) */
1241    GLuint DepthLog2;            /**< = log2(Depth2) */
1242    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1243    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1244    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1245    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1246    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1247    GLboolean IsClientData;      /**< Data owned by client? */
1248    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1249
1250    const struct gl_texture_format *TexFormat;
1251
1252    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1253
1254    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1255    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1256
1257    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1258    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1259
1260    /**
1261     * \name For device driver:
1262     */
1263    /*@{*/
1264    void *DriverData;            /**< Arbitrary device driver data */
1265    /*@}*/
1266 };
1267
1268
1269 /**
1270  * Indexes for cube map faces.
1271  */
1272 /*@{*/
1273 #define FACE_POS_X   0
1274 #define FACE_NEG_X   1
1275 #define FACE_POS_Y   2
1276 #define FACE_NEG_Y   3
1277 #define FACE_POS_Z   4
1278 #define FACE_NEG_Z   5
1279 #define MAX_FACES  6
1280 /*@}*/
1281
1282
1283 /**
1284  * Texture object state.  Contains the array of mipmap images, border color,
1285  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1286  * color palette.
1287  */
1288 struct gl_texture_object
1289 {
1290    _glthread_Mutex Mutex;       /**< for thread safety */
1291    GLint RefCount;              /**< reference count */
1292    GLuint Name;                 /**< the user-visible texture object ID */
1293    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1294    GLfloat Priority;            /**< in [0,1] */
1295    GLfloat BorderColor[4];      /**< unclamped */
1296    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1297    GLenum WrapS;                /**< S-axis texture image wrap mode */
1298    GLenum WrapT;                /**< T-axis texture image wrap mode */
1299    GLenum WrapR;                /**< R-axis texture image wrap mode */
1300    GLenum MinFilter;            /**< minification filter */
1301    GLenum MagFilter;            /**< magnification filter */
1302    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1303    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1304    GLfloat LodBias;             /**< OpenGL 1.4 */
1305    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1306    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1307    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1308    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1309    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1310    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1311    GLenum CompareMode;          /**< GL_ARB_shadow */
1312    GLenum CompareFunc;          /**< GL_ARB_shadow */
1313    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1314    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1315    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1316    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1317    GLboolean _IsPowerOfTwo;     /**< Are all image dimensions powers of two? */
1318    GLboolean Complete;          /**< Is texture object complete? */
1319
1320    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1321    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1322
1323    /** GL_EXT_paletted_texture */
1324    struct gl_color_table Palette;
1325
1326
1327    /**
1328     * \name For device driver.
1329     * Note: instead of attaching driver data to this pointer, it's preferable
1330     * to instead use this struct as a base class for your own texture object
1331     * class.  Driver->NewTextureObject() can be used to implement the
1332     * allocation.
1333     */
1334    void *DriverData;    /**< Arbitrary device driver data */
1335 };
1336
1337
1338 /**
1339  * Texture combine environment state.
1340  *
1341  * \todo
1342  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1343  * structure will need to be expanded for 4 elements.
1344  */
1345 struct gl_tex_env_combine_state
1346 {
1347    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1348    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1349    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1350    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1351    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1352    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1353    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1354    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1355    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1356    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1357 };
1358
1359
1360 /**
1361  * Texture unit state.  Contains enable flags, texture environment/function/
1362  * combiners, texgen state, pointers to current texture objects and
1363  * post-filter color tables.
1364  */
1365 struct gl_texture_unit
1366 {
1367    GLuint Enabled;              /**< bitmask of TEXTURE_*_BIT flags */
1368    GLuint _ReallyEnabled;       /**< 0 or exactly one of TEXTURE_*_BIT flags */
1369
1370    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1371    GLfloat EnvColor[4];
1372    GLuint TexGenEnabled;        /**< Bitwise-OR of [STRQ]_BIT values */
1373    /** \name Tex coord generation mode
1374     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1375    /*@{*/
1376    GLenum GenModeS;
1377    GLenum GenModeT;
1378    GLenum GenModeR;
1379    GLenum GenModeQ;
1380    /*@}*/
1381    GLuint _GenBitS;
1382    GLuint _GenBitT;
1383    GLuint _GenBitR;
1384    GLuint _GenBitQ;
1385    GLuint _GenFlags;            /**< bitwise or of GenBit[STRQ] */
1386    GLfloat ObjectPlaneS[4];
1387    GLfloat ObjectPlaneT[4];
1388    GLfloat ObjectPlaneR[4];
1389    GLfloat ObjectPlaneQ[4];
1390    GLfloat EyePlaneS[4];
1391    GLfloat EyePlaneT[4];
1392    GLfloat EyePlaneR[4];
1393    GLfloat EyePlaneQ[4];
1394    GLfloat LodBias;             /**< for biasing mipmap levels */
1395
1396    /**
1397     * \name GL_EXT_texture_env_combine
1398     */
1399    struct gl_tex_env_combine_state Combine;
1400
1401    /**
1402     * Derived state based on \c EnvMode and the \c BaseFormat of the
1403     * currently enabled texture.
1404     */
1405    struct gl_tex_env_combine_state _EnvMode;
1406
1407    /**
1408     * Currently enabled combiner state.  This will point to either
1409     * \c Combine or \c _EnvMode.
1410     */
1411    struct gl_tex_env_combine_state *_CurrentCombine;
1412
1413    struct gl_texture_object *Current1D;
1414    struct gl_texture_object *Current2D;
1415    struct gl_texture_object *Current3D;
1416    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1417    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1418
1419    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1420
1421    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1422    struct gl_texture_object Saved2D;
1423    struct gl_texture_object Saved3D;
1424    struct gl_texture_object SavedCubeMap;
1425    struct gl_texture_object SavedRect;
1426
1427    /* GL_SGI_texture_color_table */
1428    struct gl_color_table ColorTable;
1429    struct gl_color_table ProxyColorTable;
1430    GLboolean ColorTableEnabled;
1431 };
1432
1433
1434 /**
1435  * Texture attribute group (GL_TEXTURE_BIT).
1436  */
1437 struct gl_texture_attrib
1438 {
1439    /**
1440     * name multitexture
1441     */
1442    /**@{*/
1443    GLuint CurrentUnit;          /**< Active texture unit */
1444    GLuint _EnabledUnits;        /**< one bit set for each really-enabled unit */
1445    GLuint _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1446    GLuint _GenFlags;            /**< for texgen */
1447    GLuint _TexGenEnabled;
1448    GLuint _TexMatEnabled;
1449    /**@}*/
1450
1451    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1452
1453    struct gl_texture_object *Proxy1D;
1454    struct gl_texture_object *Proxy2D;
1455    struct gl_texture_object *Proxy3D;
1456    struct gl_texture_object *ProxyCubeMap;
1457    struct gl_texture_object *ProxyRect;
1458
1459    /** GL_EXT_shared_texture_palette */
1460    GLboolean SharedPalette;
1461    struct gl_color_table Palette;
1462 };
1463
1464
1465 /**
1466  * Transformation attribute group (GL_TRANSFORM_BIT).
1467  */
1468 struct gl_transform_attrib
1469 {
1470    GLenum MatrixMode;                           /**< Matrix mode */
1471    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1472    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1473    GLuint ClipPlanesEnabled;                    /**< on/off bitmask */
1474    GLboolean Normalize;                         /**< Normalize all normals? */
1475    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1476    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1477
1478    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1479    GLfloat CullEyePos[4];
1480    GLfloat CullObjPos[4];
1481 };
1482
1483
1484 /**
1485  * Viewport attribute group (GL_VIEWPORT_BIT).
1486  */
1487 struct gl_viewport_attrib
1488 {
1489    GLint X, Y;                  /**< position */
1490    GLsizei Width, Height;       /**< size */
1491    GLfloat Near, Far;           /**< Depth buffer range */
1492    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1493 };
1494
1495
1496 /**
1497  * Node for the attribute stack.
1498  */
1499 struct gl_attrib_node
1500 {
1501    GLbitfield kind;
1502    void *data;
1503    struct gl_attrib_node *next;
1504 };
1505
1506
1507 /**
1508  * GL_ARB_vertex/pixel_buffer_object buffer object
1509  */
1510 struct gl_buffer_object
1511 {
1512    GLint RefCount;
1513    GLuint Name;
1514    GLenum Usage;
1515    GLenum Access;
1516    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1517    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1518    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1519    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1520 };
1521
1522
1523
1524 /**
1525  * Client pixel packing/unpacking attributes
1526  */
1527 struct gl_pixelstore_attrib
1528 {
1529    GLint Alignment;
1530    GLint RowLength;
1531    GLint SkipPixels;
1532    GLint SkipRows;
1533    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1534    GLint SkipImages;      /**< for GL_EXT_texture3D */
1535    GLboolean SwapBytes;
1536    GLboolean LsbFirst;
1537    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1538    GLboolean Invert;        /**< GL_MESA_pack_invert */
1539    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1540 };
1541
1542
1543 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1544
1545
1546 /**
1547  * Client vertex array attributes
1548  */
1549 struct gl_client_array
1550 {
1551    GLint Size;                  /**< components per element (1,2,3,4) */
1552    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1553    GLsizei Stride;              /**< user-specified stride */
1554    GLsizei StrideB;             /**< actual stride in bytes */
1555    const GLubyte *Ptr;          /**< Points to array data */
1556    GLuint Enabled;              /**< one of the _NEW_ARRAY_ bits */
1557    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1558
1559    /**< GL_ARB_vertex_buffer_object */
1560    struct gl_buffer_object *BufferObj;
1561    GLuint _MaxElement;
1562
1563    GLuint Flags;
1564 };
1565
1566
1567 /**
1568  * Vertex array state
1569  */
1570 struct gl_array_attrib
1571 {
1572    struct gl_client_array Vertex;            /**< client data descriptors */
1573    struct gl_client_array Normal;
1574    struct gl_client_array Color;
1575    struct gl_client_array SecondaryColor;
1576    struct gl_client_array FogCoord;
1577    struct gl_client_array Index;
1578    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1579    struct gl_client_array EdgeFlag;
1580
1581    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1582
1583    GLint ActiveTexture;         /**< Client Active Texture */
1584    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1585    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1586
1587    GLuint _Enabled;             /**< _NEW_ARRAY_* - bit set if array enabled */
1588    GLuint NewState;             /**< _NEW_ARRAY_* */
1589
1590 #if FEATURE_ARB_vertex_buffer_object
1591    struct gl_buffer_object *NullBufferObj;
1592    struct gl_buffer_object *ArrayBufferObj;
1593    struct gl_buffer_object *ElementArrayBufferObj;
1594 #endif
1595    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1596 };
1597
1598
1599 /**
1600  * Feedback buffer state
1601  */
1602 struct gl_feedback
1603 {
1604    GLenum Type;
1605    GLuint _Mask;                /* FB_* bits */
1606    GLfloat *Buffer;
1607    GLuint BufferSize;
1608    GLuint Count;
1609 };
1610
1611
1612 /**
1613  * Selection buffer state
1614  */
1615 struct gl_selection
1616 {
1617    GLuint *Buffer;      /**< selection buffer */
1618    GLuint BufferSize;   /**< size of the selection buffer */
1619    GLuint BufferCount;  /**< number of values in the selection buffer */
1620    GLuint Hits;         /**< number of records in the selection buffer */
1621    GLuint NameStackDepth; /**< name stack depth */
1622    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1623    GLboolean HitFlag;   /**< hit flag */
1624    GLfloat HitMinZ;     /**< minimum hit depth */
1625    GLfloat HitMaxZ;     /**< maximum hit depth */
1626 };
1627
1628
1629 /**
1630  * 1-D Evaluator control points
1631  */
1632 struct gl_1d_map
1633 {
1634    GLuint Order;        /**< Number of control points */
1635    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1636    GLfloat *Points;     /**< Points to contiguous control points */
1637 };
1638
1639
1640 /**
1641  * 2-D Evaluator control points
1642  */
1643 struct gl_2d_map
1644 {
1645    GLuint Uorder;               /**< Number of control points in U dimension */
1646    GLuint Vorder;               /**< Number of control points in V dimension */
1647    GLfloat u1, u2, du;
1648    GLfloat v1, v2, dv;
1649    GLfloat *Points;             /**< Points to contiguous control points */
1650 };
1651
1652
1653 /**
1654  * All evaluator control point state
1655  */
1656 struct gl_evaluators
1657 {
1658    /**
1659     * \name 1-D maps
1660     */
1661    /*@{*/
1662    struct gl_1d_map Map1Vertex3;
1663    struct gl_1d_map Map1Vertex4;
1664    struct gl_1d_map Map1Index;
1665    struct gl_1d_map Map1Color4;
1666    struct gl_1d_map Map1Normal;
1667    struct gl_1d_map Map1Texture1;
1668    struct gl_1d_map Map1Texture2;
1669    struct gl_1d_map Map1Texture3;
1670    struct gl_1d_map Map1Texture4;
1671    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1672    /*@}*/
1673
1674    /**
1675     * \name 2-D maps
1676     */
1677    /*@{*/
1678    struct gl_2d_map Map2Vertex3;
1679    struct gl_2d_map Map2Vertex4;
1680    struct gl_2d_map Map2Index;
1681    struct gl_2d_map Map2Color4;
1682    struct gl_2d_map Map2Normal;
1683    struct gl_2d_map Map2Texture1;
1684    struct gl_2d_map Map2Texture2;
1685    struct gl_2d_map Map2Texture3;
1686    struct gl_2d_map Map2Texture4;
1687    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1688    /*@}*/
1689 };
1690
1691
1692 /**
1693  * NV_fragment_program runtime state
1694  */
1695 struct fp_machine
1696 {
1697    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1698    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1699    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1700    GLuint CondCodes[4];
1701 };
1702
1703 /**
1704  * ATI_fragment_shader runtime state
1705  */
1706 #define ATI_FS_INPUT_PRIMARY 0
1707 #define ATI_FS_INPUT_SECONDARY 1
1708
1709 /* 6 register sets - 2 inputs (primary, secondary) */
1710 struct atifs_machine
1711 {
1712    GLfloat Registers[6][4];
1713    GLfloat PrevPassRegisters[6][4];
1714    GLfloat Inputs[2][4];
1715    GLuint pass;
1716 };
1717
1718
1719 /**
1720  * Names of the various vertex/fragment register files
1721  */
1722 enum register_file
1723 {
1724    PROGRAM_TEMPORARY,
1725    PROGRAM_INPUT,
1726    PROGRAM_OUTPUT,
1727    PROGRAM_LOCAL_PARAM,
1728    PROGRAM_ENV_PARAM,
1729    PROGRAM_NAMED_PARAM,
1730    PROGRAM_STATE_VAR,
1731    PROGRAM_WRITE_ONLY,
1732    PROGRAM_ADDRESS
1733 };
1734
1735
1736 /** Vertex and fragment instructions */
1737 struct vp_instruction;
1738 struct fp_instruction;
1739 struct atifs_instruction;
1740 struct program_parameter_list;
1741
1742
1743 /**
1744  * Base class for any kind of program object
1745  */
1746 struct program
1747 {
1748    GLuint Id;
1749    GLubyte *String;          /**< Null-terminated program text */
1750    GLint RefCount;
1751    GLenum Target;
1752    GLenum Format;            /**< String encoding format */
1753    GLboolean Resident;
1754    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1755    GLuint NumInstructions;  /* GL_ARB_vertex/fragment_program */
1756    GLuint NumTemporaries;
1757    GLuint NumParameters;
1758    GLuint NumAttributes;
1759    GLuint NumAddressRegs;
1760 };
1761
1762
1763 /** Vertex program object */
1764 struct vertex_program
1765 {
1766    struct program Base;   /* base class */
1767    struct vp_instruction *Instructions;  /* Compiled instructions */
1768    GLboolean IsNVProgram; /* GL_NV_vertex_program ? */
1769    GLboolean IsPositionInvariant;  /* GL_NV_vertex_program1_1 */
1770    GLuint InputsRead;     /* Bitmask of which input regs are read */
1771    GLuint OutputsWritten; /* Bitmask of which output regs are written to */
1772    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1773 };
1774
1775
1776 /** Fragment program object */
1777 struct fragment_program
1778 {
1779    struct program Base;   /**< base class */
1780    struct fp_instruction *Instructions;  /**< Compiled instructions */
1781    GLuint InputsRead;     /**< Bitmask of which input regs are read */
1782    GLuint OutputsWritten; /**< Bitmask of which output regs are written to */
1783    GLuint TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_INDEX bitmask */
1784    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1785    GLuint NumTexInstructions;
1786    GLuint NumTexIndirections;
1787    GLenum FogOption;
1788    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1789
1790 #ifdef USE_TCC
1791    char c_str[4096];            /* experimental... */
1792    int c_strlen;
1793 #endif
1794 };
1795
1796 struct ati_fragment_shader
1797 {
1798    struct program Base;
1799    struct atifs_instruction *Instructions;
1800    GLfloat Constants[8][4];
1801    GLint NumPasses;
1802    GLint cur_pass;
1803 };
1804
1805 /**
1806  * State common to vertex and fragment programs.
1807  */
1808 struct gl_program_state
1809 {
1810    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_NV */
1811    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_NV */
1812 };
1813
1814
1815 /**
1816  * State vars for GL_ARB/GL_NV_vertex_program
1817  */
1818 struct gl_vertex_program_state
1819 {
1820    GLboolean Enabled;                  /**< GL_VERTEX_PROGRAM_NV */
1821    GLboolean _Enabled;                 /**< Really enabled? */
1822    GLboolean PointSizeEnabled;         /**< GL_VERTEX_PROGRAM_POINT_SIZE_NV */
1823    GLboolean TwoSideEnabled;           /**< GL_VERTEX_PROGRAM_TWO_SIDE_NV */
1824    struct vertex_program *Current;     /**< ptr to currently bound program */
1825
1826    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1827    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1828
1829    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1830    /* Only used during program execution (may be moved someday): */
1831    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1832    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1833    GLuint InputsSize[MAX_NV_VERTEX_PROGRAM_INPUTS];
1834    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1835    GLint AddressReg[4];
1836
1837 #if FEATURE_MESA_program_debug
1838    GLprogramcallbackMESA Callback;
1839    GLvoid *CallbackData;
1840    GLboolean CallbackEnabled;
1841    GLuint CurrentPosition;
1842 #endif
1843 };
1844
1845
1846 /*
1847  * State for GL_ARB/NV_fragment_program
1848  */
1849 struct gl_fragment_program_state
1850 {
1851    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1852    GLboolean _Enabled;                   /* Really enabled? */
1853    GLboolean _Active;                    /* Really really enabled? */
1854    struct fragment_program *Current;     /* ptr to currently bound program */
1855    struct fragment_program *_Current;    /* ptr to currently active program */
1856    struct fp_machine Machine;            /* machine state */
1857    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1858
1859 #if FEATURE_MESA_program_debug
1860    GLprogramcallbackMESA Callback;
1861    GLvoid *CallbackData;
1862    GLboolean CallbackEnabled;
1863    GLuint CurrentPosition;
1864 #endif
1865 };
1866
1867 /*
1868  * State for GL_fragment_shader
1869  */
1870 struct gl_ati_fragment_shader_state
1871 {
1872    GLboolean Enabled;
1873    GLboolean _Enabled;
1874    GLboolean Compiling;
1875    struct atifs_machine Machine;            /* machine state */
1876    struct ati_fragment_shader *Current;
1877 };
1878
1879 /*
1880  * State for GL_ARB_occlusion_query
1881  */
1882 struct gl_occlusion_state
1883 {
1884    GLboolean Active;
1885    GLuint CurrentQueryObject;
1886    GLuint PassedCounter;
1887    struct _mesa_HashTable *QueryObjects;
1888 };
1889
1890 /**
1891  * gl2 unique interface identifier.
1892  * Each gl2 interface has its own interface id used for object queries.
1893  */
1894 enum gl2_uiid
1895 {
1896    UIID_UNKNOWN,                /* supported by all objects */
1897    UIID_GENERIC,                /* generic object */
1898    UIID_CONTAINER,              /* contains generic objects */
1899    UIID_SHADER,                 /* shader object */
1900    UIID_FRAGMENT_SHADER,        /* fragment shader */
1901    UIID_VERTEX_SHADER,          /* vertex shader */
1902    UIID_PROGRAM,                /* program object */
1903    UIID_3DLABS_SHHANDLE         /* encapsulates 3dlabs' ShHandle */
1904 };
1905
1906 struct gl2_unknown_intf
1907 {
1908    GLvoid (* AddRef) (struct gl2_unknown_intf **);
1909    GLvoid (* Release) (struct gl2_unknown_intf **);
1910    struct gl2_unknown_intf **(* QueryInterface) (struct gl2_unknown_intf **, enum gl2_uiid uiid);
1911 };
1912
1913 struct gl2_generic_intf
1914 {
1915    struct gl2_unknown_intf _unknown;
1916    GLvoid (* Delete) (struct gl2_generic_intf **);
1917    GLenum (* GetType) (struct gl2_generic_intf **);
1918    GLhandleARB (* GetName) (struct gl2_generic_intf **);
1919    GLboolean (* GetDeleteStatus) (struct gl2_generic_intf **);
1920    const GLcharARB *(* GetInfoLog) (struct gl2_generic_intf **);
1921 };
1922
1923 struct gl2_container_intf
1924 {
1925    struct gl2_generic_intf _generic;
1926    GLboolean (* Attach) (struct gl2_container_intf **, struct gl2_generic_intf **);
1927    GLboolean (* Detach) (struct gl2_container_intf **, struct gl2_generic_intf **);
1928    GLsizei (* GetAttachedCount) (struct gl2_container_intf **);
1929    struct gl2_generic_intf **(* GetAttached) (struct gl2_container_intf **, GLuint);
1930 };
1931
1932 struct gl2_shader_intf
1933 {
1934    struct gl2_generic_intf _generic;
1935    GLenum (* GetSubType) (struct gl2_shader_intf **);
1936    GLboolean (* GetCompileStatus) (struct gl2_shader_intf **);
1937    GLvoid (* SetSource) (struct gl2_shader_intf **, GLcharARB *, GLint *, GLsizei);
1938    const GLcharARB *(* GetSource) (struct gl2_shader_intf **);
1939    GLvoid (* Compile) (struct gl2_shader_intf **);
1940 };
1941
1942 struct gl2_program_intf
1943 {
1944    struct gl2_container_intf _container;
1945    GLboolean (* GetLinkStatus) (struct gl2_program_intf **);
1946    GLboolean (* GetValidateStatus) (struct gl2_program_intf **);
1947    GLvoid (* Link) (struct gl2_program_intf **);
1948    GLvoid (* Validate) (struct gl2_program_intf **);
1949 };
1950
1951 struct gl2_fragment_shader_intf
1952 {
1953    struct gl2_shader_intf _shader;
1954 };
1955
1956 struct gl2_vertex_shader_intf
1957 {
1958    struct gl2_shader_intf _shader;
1959 };
1960
1961 struct gl2_3dlabs_shhandle_intf
1962 {
1963    struct gl2_unknown_intf _unknown;
1964    GLvoid *(* GetShHandle) (struct gl2_3dlabs_shhandle_intf **);
1965 };
1966
1967 struct gl_shader_objects_state
1968 {
1969    struct gl2_program_intf **current_program;
1970 };
1971
1972
1973 /**
1974  * State which can be shared by multiple contexts:
1975  */
1976 struct gl_shared_state
1977 {
1978    _glthread_Mutex Mutex;                  /**< for thread safety */
1979    GLint RefCount;                         /**< Reference count */
1980    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
1981    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
1982
1983    /**
1984     * \name Default texture objects (shared by all multi-texture units)
1985     */
1986    /*@{*/
1987    struct gl_texture_object *Default1D;
1988    struct gl_texture_object *Default2D;
1989    struct gl_texture_object *Default3D;
1990    struct gl_texture_object *DefaultCubeMap;
1991    struct gl_texture_object *DefaultRect;
1992    /*@}*/
1993
1994    /**
1995     * \name Vertex/fragment programs
1996     */
1997    /*@{*/
1998    struct _mesa_HashTable *Programs;
1999 #if FEATURE_ARB_vertex_program
2000    struct program *DefaultVertexProgram;
2001 #endif
2002 #if FEATURE_ARB_fragment_program
2003    struct program *DefaultFragmentProgram;
2004 #endif
2005 #if FEATURE_ATI_fragment_shader
2006    struct program *DefaultFragmentShader;
2007 #endif
2008    /*@}*/
2009
2010 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2011    struct _mesa_HashTable *BufferObjects;
2012 #endif
2013
2014    struct _mesa_HashTable *GL2Objects;
2015
2016 #if FEATURE_EXT_framebuffer_object
2017    struct _mesa_HashTable *RenderBuffers;
2018    struct _mesa_HashTable *FrameBuffers;
2019 #endif
2020
2021    void *DriverData;  /**< Device driver shared state */
2022 };
2023
2024
2025
2026
2027 /**
2028  * A renderbuffer stores colors or depth values or stencil values.
2029  * A framebuffer object will have a collection of these.
2030  * Data are read/written to the buffer with a handful of Get/Put functions.
2031  *
2032  * Instances of this object are allocated with the Driver's NewRenderbuffer
2033  * hook.  Drivers will likely wrap this class inside a driver-specific
2034  * class to simulate inheritance.
2035  */
2036 struct gl_renderbuffer
2037 {
2038    GLuint Name;
2039    GLint RefCount;
2040    GLuint Width, Height;
2041    GLenum InternalFormat; /* The user-specified value */
2042    GLenum _BaseFormat;    /* Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or */
2043                           /* GL_STENCIL_INDEX. */
2044    GLenum DataType;       /* Type of values passed to the Get/Put functions */
2045    GLubyte ComponentSizes[4];  /* bits per component or channel */
2046    GLvoid *Data;
2047
2048    /* Delete this renderbuffer */
2049    void (*Delete)(struct gl_renderbuffer *rb);
2050
2051    /* Allocate new storage for this renderbuffer */
2052    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2053                              GLenum internalFormat,
2054                              GLuint width, GLuint height);
2055
2056    /* Lock/Unlock are called before/after calling the Get/Put functions.
2057     * Not sure this is the right place for these yet.
2058    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2059    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2060     */
2061
2062    /* Return a pointer to the element/pixel at (x,y).
2063     * Should return NULL if the buffer memory can't be directly addressed.
2064     */
2065    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2066                        GLint x, GLint y);
2067
2068    /* Get/Read a row of values.
2069     * The values will be of format _BaseFormat and type DataType.
2070     */
2071    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2072                   GLint x, GLint y, void *values);
2073
2074    /* Get/Read values at arbitrary locations.
2075     * The values will be of format _BaseFormat and type DataType.
2076     */
2077    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2078                      const GLint x[], const GLint y[], void *values);
2079
2080    /* Put/Write a row of values.
2081     * The values will be of format _BaseFormat and type DataType.
2082     */
2083    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2084                   GLint x, GLint y, const void *values, const GLubyte *mask);
2085
2086    /* Put/Write a row of RGB values.  This is a special-case routine that's
2087     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2088     * a common case for glDrawPixels and some triangle routines.
2089     * The values will be of format GL_RGB and type DataType.
2090     */
2091    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2092                     GLint x, GLint y, const void *values, const GLubyte *mask);
2093
2094
2095    /* Put/Write a row of identical values.
2096     * The values will be of format _BaseFormat and type DataType.
2097     */
2098    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2099                      GLint x, GLint y, const void *value, const GLubyte *mask);
2100
2101    /* Put/Write values at arbitrary locations.
2102     * The values will be of format _BaseFormat and type DataType.
2103     */
2104    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2105                      const GLint x[], const GLint y[], const void *values,
2106                      const GLubyte *mask);
2107    /* Put/Write identical values at arbitrary locations.
2108     * The values will be of format _BaseFormat and type DataType.
2109     */
2110    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2111                          GLuint count, const GLint x[], const GLint y[],
2112                          const void *value, const GLubyte *mask);
2113 };
2114
2115
2116 /**
2117  * A renderbuffer attachment point points to either a texture object
2118  * (and specifies a mipmap level, cube face or 3D texture slice) or
2119  * points to a renderbuffer.
2120  */
2121 struct gl_renderbuffer_attachment
2122 {
2123    GLenum Type;  /* GL_NONE or GL_TEXTURE or GL_RENDERBUFFER_EXT */
2124    GLboolean Complete;
2125
2126    /* IF Type == GL_RENDERBUFFER_EXT: */
2127    struct gl_renderbuffer *Renderbuffer;
2128
2129    /* IF Type == GL_TEXTURE: */
2130    struct gl_texture_object *Texture;
2131    GLuint TextureLevel;
2132    GLuint CubeMapFace;  /* 0 .. 5, for cube map textures */
2133    GLuint Zoffset;      /* for 3D textures */
2134 };
2135
2136
2137 /**
2138  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2139  * In C++ terms, think of this as a base class from which device drivers
2140  * will make derived classes.
2141  */
2142 struct gl_framebuffer
2143 {
2144    GLuint Name;      /* if zero, this is a window system framebuffer */
2145    GLint RefCount;
2146
2147    GLvisual Visual;             /**< The corresponding visual */
2148
2149    GLboolean Initialized;
2150
2151    GLuint Width, Height;        /**< size of frame buffer in pixels */
2152
2153    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2154    /*@{*/
2155    GLint _Xmin, _Xmax;  /**< inclusive */
2156    GLint _Ymin, _Ymax;  /**< exclusive */
2157    /*@}*/
2158
2159    /** \name  Derived Z buffer stuff */
2160    /*@{*/
2161    GLuint _DepthMax;    /**< Max depth buffer value */
2162    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2163    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2164    /*@}*/
2165
2166    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2167
2168    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2169    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2170
2171    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2172     * attribute group and GL_PIXEL attribute group, respectively.
2173     */
2174    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2175    GLenum ColorReadBuffer;
2176
2177    /* These are computed from ColorDrawBuffer and ColorReadBuffer */
2178    GLuint _ColorDrawBufferMask[MAX_DRAW_BUFFERS]; /* Mask of BUFFER_BIT_* flags */
2179    GLuint _ColorReadBufferMask; /* Zero or one of BUFFER_BIT_ flags */
2180
2181    /* These are computed from _Draw/ReadBufferMask, above. */
2182    GLuint _NumColorDrawBuffers[MAX_DRAW_BUFFERS];
2183    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS][4];
2184    struct gl_renderbuffer *_ColorReadBuffer;
2185
2186 #if OLD_RENDERBUFFER
2187    /* XXX THIS IS TEMPORARY */
2188    GLuint _ColorDrawBit[MAX_DRAW_BUFFERS][4];
2189 #endif
2190
2191    /** Delete this framebuffer */
2192    void (*Delete)(struct gl_framebuffer *fb);
2193 };
2194
2195
2196 /**
2197  * Constants which may be overridden by device driver during context creation
2198  * but are never changed after that.
2199  */
2200 struct gl_constants
2201 {
2202    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2203    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2204    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2205    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2206    GLuint MaxTextureCoordUnits;
2207    GLuint MaxTextureImageUnits;
2208    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
2209    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2210    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2211    GLuint MaxArrayLockSize;
2212    GLint SubPixelBits;
2213    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2214    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2215    GLfloat PointSizeGranularity;
2216    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2217    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2218    GLfloat LineWidthGranularity;
2219    GLuint MaxColorTableSize;
2220    GLuint MaxConvolutionWidth;
2221    GLuint MaxConvolutionHeight;
2222    GLuint MaxClipPlanes;
2223    GLuint MaxLights;
2224    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2225    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2226    GLuint MaxViewportWidth, MaxViewportHeight;
2227    /* GL_ARB_vertex_program */
2228    GLuint MaxVertexProgramInstructions;
2229    GLuint MaxVertexProgramAttribs;
2230    GLuint MaxVertexProgramTemps;
2231    GLuint MaxVertexProgramLocalParams;
2232    GLuint MaxVertexProgramEnvParams;
2233    GLuint MaxVertexProgramAddressRegs;
2234    /* GL_ARB_fragment_program */
2235    GLuint MaxFragmentProgramInstructions;
2236    GLuint MaxFragmentProgramAttribs;
2237    GLuint MaxFragmentProgramTemps;
2238    GLuint MaxFragmentProgramLocalParams;
2239    GLuint MaxFragmentProgramEnvParams;
2240    GLuint MaxFragmentProgramAddressRegs;
2241    GLuint MaxFragmentProgramAluInstructions;
2242    GLuint MaxFragmentProgramTexInstructions;
2243    GLuint MaxFragmentProgramTexIndirections;
2244    /* vertex or fragment program */
2245    GLuint MaxProgramMatrices;
2246    GLuint MaxProgramMatrixStackDepth;
2247    /* vertex array / buffer object bounds checking */
2248    GLboolean CheckArrayBounds;
2249    /* GL_ARB_draw_buffers */
2250    GLuint MaxDrawBuffers;
2251    /* GL_OES_read_format */
2252    GLenum ColorReadFormat;
2253    GLenum ColorReadType;
2254    /* GL_EXT_framebuffer_object */
2255    GLuint MaxColorAttachments;
2256    GLuint MaxRenderbufferSize;
2257 };
2258
2259
2260 /**
2261  * Enable flag for each OpenGL extension.  Different device drivers will
2262  * enable different extensions at runtime.
2263  */
2264 struct gl_extensions
2265 {
2266    /**
2267     * \name Flags to quickly test if certain extensions are available.
2268     *
2269     * Not every extension needs to have such a flag, but it's encouraged.
2270     */
2271    /*@{*/
2272    GLboolean dummy;  /* don't remove this! */
2273    GLboolean ARB_depth_texture;
2274    GLboolean ARB_draw_buffers;
2275    GLboolean ARB_fragment_program;
2276    GLboolean ARB_fragment_shader;
2277    GLboolean ARB_half_float_pixel;
2278    GLboolean ARB_imaging;
2279    GLboolean ARB_multisample;
2280    GLboolean ARB_multitexture;
2281    GLboolean ARB_occlusion_query;
2282    GLboolean ARB_point_sprite;
2283    GLboolean ARB_shader_objects;
2284    GLboolean ARB_shading_language_100;
2285    GLboolean ARB_shadow;
2286    GLboolean ARB_texture_border_clamp;
2287    GLboolean ARB_texture_compression;
2288    GLboolean ARB_texture_cube_map;
2289    GLboolean ARB_texture_env_combine;
2290    GLboolean ARB_texture_env_crossbar;
2291    GLboolean ARB_texture_env_dot3;
2292    GLboolean ARB_texture_float;
2293    GLboolean ARB_texture_mirrored_repeat;
2294    GLboolean ARB_texture_non_power_of_two;
2295    GLboolean ARB_transpose_matrix;
2296    GLboolean ARB_vertex_buffer_object;
2297    GLboolean ARB_vertex_program;
2298    GLboolean ARB_vertex_shader;
2299    GLboolean ARB_window_pos;
2300    GLboolean EXT_abgr;
2301    GLboolean EXT_bgra;
2302    GLboolean EXT_blend_color;
2303    GLboolean EXT_blend_equation_separate;
2304    GLboolean EXT_blend_func_separate;
2305    GLboolean EXT_blend_logic_op;
2306    GLboolean EXT_blend_minmax;
2307    GLboolean EXT_blend_subtract;
2308    GLboolean EXT_clip_volume_hint;
2309    GLboolean EXT_cull_vertex;
2310    GLboolean EXT_convolution;
2311    GLboolean EXT_compiled_vertex_array;
2312    GLboolean EXT_copy_texture;
2313    GLboolean EXT_depth_bounds_test;
2314    GLboolean EXT_draw_range_elements;
2315    GLboolean EXT_framebuffer_object;
2316    GLboolean EXT_fog_coord;
2317    GLboolean EXT_histogram;
2318    GLboolean EXT_multi_draw_arrays;
2319    GLboolean EXT_paletted_texture;
2320    GLboolean EXT_packed_pixels;
2321    GLboolean EXT_pixel_buffer_object;
2322    GLboolean EXT_point_parameters;
2323    GLboolean EXT_polygon_offset;
2324    GLboolean EXT_rescale_normal;
2325    GLboolean EXT_shadow_funcs;
2326    GLboolean EXT_secondary_color;
2327    GLboolean EXT_separate_specular_color;
2328    GLboolean EXT_shared_texture_palette;
2329    GLboolean EXT_stencil_wrap;
2330    GLboolean EXT_stencil_two_side;
2331    GLboolean EXT_subtexture;
2332    GLboolean EXT_texture;
2333    GLboolean EXT_texture_object;
2334    GLboolean EXT_texture3D;
2335    GLboolean EXT_texture_compression_s3tc;
2336    GLboolean EXT_texture_env_add;
2337    GLboolean EXT_texture_env_combine;
2338    GLboolean EXT_texture_env_dot3;
2339    GLboolean EXT_texture_filter_anisotropic;
2340    GLboolean EXT_texture_lod_bias;
2341    GLboolean EXT_texture_mirror_clamp;
2342    GLboolean EXT_vertex_array;
2343    GLboolean EXT_vertex_array_set;
2344    /* vendor extensions */
2345    GLboolean APPLE_client_storage;
2346    GLboolean APPLE_packed_pixels;
2347    GLboolean ATI_texture_mirror_once;
2348    GLboolean ATI_texture_env_combine3;
2349    GLboolean ATI_fragment_shader;
2350    GLboolean HP_occlusion_test;
2351    GLboolean IBM_rasterpos_clip;
2352    GLboolean IBM_multimode_draw_arrays;
2353    GLboolean MESA_pack_invert;
2354    GLboolean MESA_packed_depth_stencil;
2355    GLboolean MESA_program_debug;
2356    GLboolean MESA_resize_buffers;
2357    GLboolean MESA_ycbcr_texture;
2358    GLboolean NV_blend_square;
2359    GLboolean NV_fragment_program;
2360    GLboolean NV_light_max_exponent;
2361    GLboolean NV_point_sprite;
2362    GLboolean NV_texgen_reflection;
2363    GLboolean NV_texture_rectangle;
2364    GLboolean NV_vertex_program;
2365    GLboolean NV_vertex_program1_1;
2366    GLboolean OES_read_format;
2367    GLboolean SGI_color_matrix;
2368    GLboolean SGI_color_table;
2369    GLboolean SGI_texture_color_table;
2370    GLboolean SGIS_generate_mipmap;
2371    GLboolean SGIS_pixel_texture;
2372    GLboolean SGIS_texture_edge_clamp;
2373    GLboolean SGIS_texture_lod;
2374    GLboolean SGIX_depth_texture;
2375    GLboolean SGIX_pixel_texture;
2376    GLboolean SGIX_shadow;
2377    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2378    GLboolean TDFX_texture_compression_FXT1;
2379    GLboolean S3_s3tc;
2380    /*@}*/
2381    /* The extension string */
2382    const GLubyte *String;
2383 };
2384
2385
2386 /**
2387  * A stack of matrices (projection, modelview, color, texture, etc).
2388  */
2389 struct matrix_stack
2390 {
2391    GLmatrix *Top;      /**< points into Stack */
2392    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2393    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2394    GLuint MaxDepth;    /**< size of Stack[] array */
2395    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2396 };
2397
2398
2399 /**
2400  * \name Bits for image transfer operations
2401  *
2402  * \sa __GLcontextRec::ImageTransferState.
2403  */
2404 /*@{*/
2405 #define IMAGE_SCALE_BIAS_BIT                      0x1
2406 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2407 #define IMAGE_MAP_COLOR_BIT                       0x4
2408 #define IMAGE_COLOR_TABLE_BIT                     0x8
2409 #define IMAGE_CONVOLUTION_BIT                     0x10
2410 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2411 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2412 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2413 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2414 #define IMAGE_HISTOGRAM_BIT                       0x200
2415 #define IMAGE_MIN_MAX_BIT                         0x400
2416 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2417
2418
2419 /** Pixel Transfer ops up to convolution */
2420 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2421                                     IMAGE_SHIFT_OFFSET_BIT |   \
2422                                     IMAGE_MAP_COLOR_BIT |      \
2423                                     IMAGE_COLOR_TABLE_BIT)
2424
2425 /** Pixel transfer ops after convolution */
2426 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2427                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2428                                      IMAGE_COLOR_MATRIX_BIT |                 \
2429                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2430                                      IMAGE_HISTOGRAM_BIT |                    \
2431                                      IMAGE_MIN_MAX_BIT)
2432 /*@}*/
2433
2434
2435 /**
2436  * \name Bits to indicate what state has changed.
2437  *
2438  * 4 unused flags.
2439  */
2440 /*@{*/
2441 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2442 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2443 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2444 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2445 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2446 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2447 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2448 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2449 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2450 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2451 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2452 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2453 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2454 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2455 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2456 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2457 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2458 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2459 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2460 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2461 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2462 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2463 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2464 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2465 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2466 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2467 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2468 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2469 #define _NEW_ALL ~0
2470 /*@}*/
2471
2472
2473 /**
2474  * \name Bits to track array state changes
2475  *
2476  * Also used to summarize array enabled.
2477  */
2478 /*@{*/
2479 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2480 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2481 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2482 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2483 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2484 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2485 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
2486 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
2487 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2488 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2489 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2490 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2491 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2492 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2493 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2494 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2495 #define _NEW_ARRAY_ATTRIB_0         0x10000  /* start at bit 16 */
2496 #define _NEW_ARRAY_ALL              0xffffffff
2497
2498
2499 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2500 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2501 /*@}*/
2502
2503
2504 /**
2505  * \name A bunch of flags that we think might be useful to drivers.
2506  *
2507  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2508  */
2509 /*@{*/
2510 #define DD_FLATSHADE                0x1
2511 #define DD_SEPARATE_SPECULAR        0x2
2512 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2513 #define DD_TRI_LIGHT_TWOSIDE        0x8
2514 #define DD_TRI_UNFILLED             0x10
2515 #define DD_TRI_SMOOTH               0x20
2516 #define DD_TRI_STIPPLE              0x40
2517 #define DD_TRI_OFFSET               0x80
2518 #define DD_LINE_SMOOTH              0x100
2519 #define DD_LINE_STIPPLE             0x200
2520 #define DD_LINE_WIDTH               0x400
2521 #define DD_POINT_SMOOTH             0x800
2522 #define DD_POINT_SIZE               0x1000
2523 #define DD_POINT_ATTEN              0x2000
2524 #define DD_TRI_TWOSTENCIL           0x4000
2525 /*@}*/
2526
2527
2528 /**
2529  * \name Define the state changes under which each of these bits might change
2530  */
2531 /*@{*/
2532 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2533 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2534 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2535 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2536 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2537 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2538 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2539 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2540 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2541 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2542 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2543 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2544 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2545 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2546 /*@}*/
2547
2548
2549 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2550                                            _NEW_TEXTURE |       \
2551                                            _NEW_POINT |         \
2552                                            _NEW_MODELVIEW)
2553
2554 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2555                                            _NEW_TEXTURE)
2556
2557 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2558
2559
2560
2561
2562 /*
2563  * Forward declaration of display list data types:
2564  */
2565 union node;
2566 typedef union node Node;
2567
2568
2569 /* This has to be included here. */
2570 #include "dd.h"
2571
2572
2573 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2574
2575 /**
2576  * Core Mesa's support for tnl modules:
2577  */
2578 struct gl_tnl_module
2579 {
2580    /**
2581     * Vertex format to be lazily swapped into current dispatch.
2582     */
2583    const GLvertexformat *Current;
2584
2585    /**
2586     * \name Record of functions swapped out.
2587     * On restore, only need to swap these functions back in.
2588     */
2589    /*@{*/
2590    void *Swapped[NUM_VERTEX_FORMAT_ENTRIES][2];
2591    GLuint SwapCount;
2592    /*@}*/
2593 };
2594
2595 /* Strictly this is a tnl/ private concept, but it doesn't seem
2596  * worthwhile adding a tnl private structure just to hold this one bit
2597  * of information:
2598  */
2599 #define MESA_DLIST_DANGLING_REFS     0x1
2600
2601 /* Provide a location where information about a display list can be
2602  * collected.  Could be extended with driverPrivate structures,
2603  * etc. in the future.
2604  */
2605 struct mesa_display_list
2606 {
2607    Node *node;
2608    GLuint id;
2609    GLuint flags;
2610 };
2611
2612
2613 /**
2614  * State used during display list compilation and execution.
2615  */
2616 struct mesa_list_state
2617 {
2618    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2619    GLuint CallDepth;            /**< Current recursion calling depth */
2620
2621    struct mesa_display_list *CurrentList;
2622    Node *CurrentListPtr;        /**< Head of list being compiled */
2623    GLuint CurrentListNum;       /**< Number of the list being compiled */
2624    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2625    GLuint CurrentPos;           /**< Index into current block of nodes */
2626
2627    GLvertexformat ListVtxfmt;
2628
2629    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2630    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2631
2632    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2633    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2634
2635    GLubyte ActiveIndex;
2636    GLfloat CurrentIndex;
2637
2638    GLubyte ActiveEdgeFlag;
2639    GLboolean CurrentEdgeFlag;
2640 };
2641
2642
2643 /**
2644  * Mesa rendering context.
2645  *
2646  * This is the central context data structure for Mesa.  Almost all
2647  * OpenGL state is contained in this structure.
2648  * Think of this as a base class from which device drivers will derive
2649  * sub classes.
2650  *
2651  * The GLcontext typedef names this structure.
2652  */
2653 struct __GLcontextRec
2654 {
2655    /**
2656     * \name OS related interfaces.
2657     *
2658     * These \b must be the first members of this structure, because they are
2659     * exposed to the outside world (i.e. GLX extension).
2660     */
2661    /*@{*/
2662    __GLimports imports;
2663    __GLexports exports;
2664    /*@}*/
2665
2666    /** State possibly shared with other contexts in the address space */
2667    struct gl_shared_state *Shared;
2668
2669    /** \name API function pointer tables */
2670    /*@{*/
2671    struct _glapi_table *Save;   /**< Display list save functions */
2672    struct _glapi_table *Exec;   /**< Execute functions */
2673    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2674    /*@}*/
2675
2676    GLvisual Visual;
2677    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2678    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2679    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2680    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2681
2682    /**
2683     * Device driver function pointer table
2684     */
2685    struct dd_function_table Driver;
2686
2687    void *DriverCtx;     /**< Points to device driver context/state */
2688    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2689
2690    /** Core/Driver constants */
2691    struct gl_constants Const;
2692
2693    /** \name The various 4x4 matrix stacks */
2694    /*@{*/
2695    struct matrix_stack ModelviewMatrixStack;
2696    struct matrix_stack ProjectionMatrixStack;
2697    struct matrix_stack ColorMatrixStack;
2698    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2699    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2700    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2701    /*@}*/
2702
2703    /** Combined modelview and projection matrix */
2704    GLmatrix _ModelProjectMatrix;
2705
2706    /** \name Display lists */
2707    struct mesa_list_state ListState;
2708
2709    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2710    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2711
2712    /** Extensions */
2713    struct gl_extensions Extensions;
2714
2715    /** \name Renderer attribute stack */
2716    /*@{*/
2717    GLuint AttribStackDepth;
2718    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2719    /*@}*/
2720
2721    /** \name Renderer attribute groups
2722     *
2723     * We define a struct for each attribute group to make pushing and popping
2724     * attributes easy.  Also it's a good organization.
2725     */
2726    /*@{*/
2727    struct gl_accum_attrib       Accum;          /**< Accumulation buffer attributes */
2728    struct gl_colorbuffer_attrib Color;          /**< Color buffers attributes */
2729    struct gl_current_attrib     Current;        /**< Current attributes */
2730    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2731    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2732    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2733    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2734    struct gl_light_attrib       Light;          /**< Light attributes */
2735    struct gl_line_attrib        Line;           /**< Line attributes */
2736    struct gl_list_attrib        List;           /**< List attributes */
2737    struct gl_multisample_attrib Multisample;
2738    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2739    struct gl_point_attrib       Point;          /**< Point attributes */
2740    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2741    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2742    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2743    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2744    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2745    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2746    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2747    /*@}*/
2748
2749    /** \name Client attribute stack */
2750    /*@{*/
2751    GLuint ClientAttribStackDepth;
2752    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2753    /*@}*/
2754
2755    /** \name Client attribute groups */
2756    /*@{*/
2757    struct gl_array_attrib       Array;  /**< Vertex arrays */
2758    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2759    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2760    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2761    /*@}*/
2762
2763    /** \name Other assorted state (not pushed/popped on attribute stack) */
2764    /*@{*/
2765    struct gl_histogram_attrib   Histogram;
2766    struct gl_minmax_attrib      MinMax;
2767    struct gl_convolution_attrib Convolution1D;
2768    struct gl_convolution_attrib Convolution2D;
2769    struct gl_convolution_attrib Separable2D;
2770
2771    struct gl_evaluators EvalMap;   /**< All evaluators */
2772    struct gl_feedback   Feedback;  /**< Feedback */
2773    struct gl_selection  Select;    /**< Selection */
2774
2775    struct gl_color_table ColorTable;       /**< Pre-convolution */
2776    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2777    struct gl_color_table PostConvolutionColorTable;
2778    struct gl_color_table ProxyPostConvolutionColorTable;
2779    struct gl_color_table PostColorMatrixColorTable;
2780    struct gl_color_table ProxyPostColorMatrixColorTable;
2781
2782    struct gl_program_state Program;        /**< for vertex or fragment progs */
2783    struct gl_vertex_program_state VertexProgram;   /**< GL_NV_vertex_program */
2784    struct gl_fragment_program_state FragmentProgram;  /**< GL_NV_fragment_program */
2785    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
2786
2787    struct fragment_program _TexEnvProgram;     /**< Texture state as fragment program */
2788    struct vertex_program _TnlProgram;          /**< Fixed func TNL state as vertex program */
2789
2790    GLboolean _MaintainTexEnvProgram;
2791    GLboolean _MaintainTnlProgram;
2792
2793    struct gl_occlusion_state Occlusion;  /**< GL_ARB_occlusion_query */
2794
2795    struct gl_shader_objects_state ShaderObjects;        /* GL_ARB_shader_objects */
2796    /*@}*/
2797
2798 #if FEATURE_EXT_framebuffer_object
2799    /*struct gl_framebuffer *CurrentFramebuffer;*/
2800    struct gl_renderbuffer *CurrentRenderbuffer;
2801 #endif
2802
2803    GLenum ErrorValue;        /**< Last error code */
2804    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2805    GLuint NewState;          /**< bitwise-or of _NEW_* flags */
2806
2807    /** \name Derived state */
2808    /*@{*/
2809    GLuint _TriangleCaps;      /**< bitwise-or of DD_* flags */
2810    GLuint _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2811    GLfloat _EyeZDir[3];
2812    GLfloat _ModelViewInvScale;
2813    GLuint _NeedEyeCoords;
2814    GLuint _ForceEyeCoords;
2815    GLboolean _RotateMode;
2816    GLenum _CurrentProgram;    /* currently executing program */
2817
2818    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2819    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2820    /**@}*/
2821
2822    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2823
2824
2825    GLboolean OcclusionResult;       /**< for GL_HP_occlusion_test */
2826    GLboolean OcclusionResultSaved;  /**< for GL_HP_occlusion_test */
2827    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2828                     *
2829                     * We don't have a better way to communicate this value from
2830                     * swrast_setup to swrast. */
2831
2832    /** \name Color clamping (tentative part of GL_ARB_color_clamp_control) */
2833    /*@{*/
2834    GLboolean ClampFragmentColors;
2835    GLboolean ClampVertexColors;
2836    /*@}*/
2837
2838    /** \name For debugging/development only */
2839    /*@{*/
2840    GLboolean FirstTimeCurrent;
2841    /*@}*/
2842
2843    /** Dither disable via MESA_NO_DITHER env var */
2844    GLboolean NoDither;
2845
2846    /** software compression/decompression supported or not */
2847    GLboolean Mesa_DXTn;
2848
2849    /** Core tnl module support */
2850    struct gl_tnl_module TnlModule;
2851
2852    /**
2853     * \name Hooks for module contexts.
2854     *
2855     * These will eventually live in the driver or elsewhere.
2856     */
2857    /*@{*/
2858    void *swrast_context;
2859    void *swsetup_context;
2860    void *swtnl_context;
2861    void *swtnl_im;
2862    void *acache_context;
2863    void *aelt_context;
2864    /*@}*/
2865 };
2866
2867
2868 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2869 extern const char *_mesa_prim_name[GL_POLYGON+4];
2870
2871
2872 #ifdef MESA_DEBUG
2873 extern int MESA_VERBOSE;
2874 extern int MESA_DEBUG_FLAGS;
2875 # define MESA_FUNCTION __FUNCTION__
2876 #else
2877 # define MESA_VERBOSE 0
2878 # define MESA_DEBUG_FLAGS 0
2879 # define MESA_FUNCTION "a function"
2880 # ifndef NDEBUG
2881 #  define NDEBUG
2882 # endif
2883 #endif
2884
2885
2886 enum _verbose
2887 {
2888    VERBOSE_VARRAY               = 0x0001,
2889    VERBOSE_TEXTURE              = 0x0002,
2890    VERBOSE_IMMEDIATE            = 0x0004,
2891    VERBOSE_PIPELINE             = 0x0008,
2892    VERBOSE_DRIVER               = 0x0010,
2893    VERBOSE_STATE                = 0x0020,
2894    VERBOSE_API                  = 0x0040,
2895    VERBOSE_DISPLAY_LIST         = 0x0100,
2896    VERBOSE_LIGHTING             = 0x0200,
2897    VERBOSE_PRIMS                = 0x0400,
2898    VERBOSE_VERTS                = 0x0800
2899 };
2900
2901
2902 enum _debug
2903 {
2904    DEBUG_ALWAYS_FLUSH           = 0x1
2905 };
2906
2907
2908
2909 #define Elements(x) sizeof(x)/sizeof(*(x))
2910
2911
2912 #endif /* TYPES_H */