src/mesa/main/mtypes.h

   1 /**
   2  * \file mtypes.h
   3  * Main Mesa data structures.
   4  *
   5  * Please try to mark derived values with a leading underscore ('_').
   6  */
   7
   8 /*
   9  * Mesa 3-D graphics library
  10  * Version:  6.5
  11  *
  12  * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the "Software"),
  16  * to deal in the Software without restriction, including without limitation
  17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  18  * and/or sell copies of the Software, and to permit persons to whom the
  19  * Software is furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice shall be included
  22  * in all copies or substantial portions of the Software.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  25  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  27  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  28  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30  */
  31
  32
  33
  34 #ifndef TYPES_H
  35 #define TYPES_H
  36
  37
  38 #include "glheader.h"
  39 #include <GL/internal/glcore.h> /* GLimports/GLexports/GLcontextModes */
  40 #include "config.h"             /* Hardwired parameters */
  41 #include "glapitable.h"
  42 #include "glthread.h"
  43 #include "math/m_matrix.h"      /* GLmatrix */
  44
  45
  46 /**
  47  * Color channel data type.
  48  */
  49 #if CHAN_BITS == 8
  50    typedef GLubyte GLchan;
  51 #define CHAN_MAX 255
  52 #define CHAN_MAXF 255.0F
  53 #define CHAN_TYPE GL_UNSIGNED_BYTE
  54 #elif CHAN_BITS == 16
  55    typedef GLushort GLchan;
  56 #define CHAN_MAX 65535
  57 #define CHAN_MAXF 65535.0F
  58 #define CHAN_TYPE GL_UNSIGNED_SHORT
  59 #elif CHAN_BITS == 32
  60    typedef GLfloat GLchan;
  61 #define CHAN_MAX 1.0
  62 #define CHAN_MAXF 1.0F
  63 #define CHAN_TYPE GL_FLOAT
  64 #else
  65 #error "illegal number of color channel bits"
  66 #endif
  67
  68
  69 #if ACCUM_BITS != 16
  70 /* Software accum done with GLshort at this time */
  71 #  error "illegal number of accumulation bits"
  72 #endif
  73
  74
  75 /**
  76  * Stencil buffer data type.
  77  */
  78 #if STENCIL_BITS==8
  79    typedef GLubyte GLstencil;
  80 #elif STENCIL_BITS==16
  81    typedef GLushort GLstencil;
  82 #else
  83 #  error "illegal number of stencil bits"
  84 #endif
  85
  86
  87 /**
  88  * Used for storing intermediate depth buffer values.
  89  * The actual depth/Z buffer might use 16 or 32-bit values.
  90  *
  91  * \note Must be 32-bits!
  92  */
  93 typedef GLuint GLdepth;
  94
  95
  96 /**
  97  * Fixed point data type.
  98  */
  99 typedef int GLfixed;
 100 /*
 101  * Fixed point arithmetic macros
 102  */
 103 #ifndef FIXED_FRAC_BITS
 104 #define FIXED_FRAC_BITS 11
 105 #endif
 106
 107 #define FIXED_SHIFT     FIXED_FRAC_BITS
 108 #define FIXED_ONE       (1 << FIXED_SHIFT)
 109 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
 110 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
 111 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
 112 #define FIXED_EPSILON   1
 113 #define FIXED_SCALE     ((float) FIXED_ONE)
 114 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 115 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 116 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 117 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 118 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 119 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 120 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 121 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 122 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 123 #define PosFloatToFixed(X)      FloatToFixed(X)
 124 #define SignedFloatToFixed(X)   FloatToFixed(X)
 125
 126
 127
 128 /**
 129  * \name Some forward type declarations
 130  */
 131 /*@{*/
 132 struct _mesa_HashTable;
 133 struct gl_pixelstore_attrib;
 134 struct gl_texture_format;
 135 struct gl_texture_image;
 136 struct gl_texture_object;
 137 typedef struct __GLcontextRec GLcontext;
 138 typedef struct __GLcontextModesRec GLvisual;
 139 typedef struct gl_framebuffer GLframebuffer;
 140 /*@}*/
 141
 142
 143
 144 /**
 145  * Indexes for vertex program attributes.
 146  * GL_NV_vertex_program aliases generic attributes over the conventional
 147  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 148  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 149  * generic attributes are distinct/separate).
 150  */
 151 enum
 152 {
 153    VERT_ATTRIB_POS = 0,
 154    VERT_ATTRIB_WEIGHT = 1,
 155    VERT_ATTRIB_NORMAL = 2,
 156    VERT_ATTRIB_COLOR0 = 3,
 157    VERT_ATTRIB_COLOR1 = 4,
 158    VERT_ATTRIB_FOG = 5,
 159    VERT_ATTRIB_SIX = 6,
 160    VERT_ATTRIB_SEVEN = 7,
 161    VERT_ATTRIB_TEX0 = 8,
 162    VERT_ATTRIB_TEX1 = 9,
 163    VERT_ATTRIB_TEX2 = 10,
 164    VERT_ATTRIB_TEX3 = 11,
 165    VERT_ATTRIB_TEX4 = 12,
 166    VERT_ATTRIB_TEX5 = 13,
 167    VERT_ATTRIB_TEX6 = 14,
 168    VERT_ATTRIB_TEX7 = 15,
 169    VERT_ATTRIB_GENERIC0 = 16,
 170    VERT_ATTRIB_GENERIC1 = 17,
 171    VERT_ATTRIB_GENERIC2 = 18,
 172    VERT_ATTRIB_GENERIC3 = 19,
 173    VERT_ATTRIB_MAX = 16
 174 };
 175
 176 /**
 177  * Bitflags for vertex attributes.
 178  * These are used in bitfields in many places.
 179  */
 180 /*@{*/
 181 #define VERT_BIT_POS      (1 << VERT_ATTRIB_POS)
 182 #define VERT_BIT_WEIGHT   (1 << VERT_ATTRIB_WEIGHT)
 183 #define VERT_BIT_NORMAL   (1 << VERT_ATTRIB_NORMAL)
 184 #define VERT_BIT_COLOR0   (1 << VERT_ATTRIB_COLOR0)
 185 #define VERT_BIT_COLOR1   (1 << VERT_ATTRIB_COLOR1)
 186 #define VERT_BIT_FOG      (1 << VERT_ATTRIB_FOG)
 187 #define VERT_BIT_SIX      (1 << VERT_ATTRIB_SIX)
 188 #define VERT_BIT_SEVEN    (1 << VERT_ATTRIB_SEVEN)
 189 #define VERT_BIT_TEX0     (1 << VERT_ATTRIB_TEX0)
 190 #define VERT_BIT_TEX1     (1 << VERT_ATTRIB_TEX1)
 191 #define VERT_BIT_TEX2     (1 << VERT_ATTRIB_TEX2)
 192 #define VERT_BIT_TEX3     (1 << VERT_ATTRIB_TEX3)
 193 #define VERT_BIT_TEX4     (1 << VERT_ATTRIB_TEX4)
 194 #define VERT_BIT_TEX5     (1 << VERT_ATTRIB_TEX5)
 195 #define VERT_BIT_TEX6     (1 << VERT_ATTRIB_TEX6)
 196 #define VERT_BIT_TEX7     (1 << VERT_ATTRIB_TEX7)
 197 #define VERT_BIT_GENERIC0 (1 << VERT_ATTRIB_GENERIC0)
 198 #define VERT_BIT_GENERIC1 (1 << VERT_ATTRIB_GENERIC1)
 199 #define VERT_BIT_GENERIC2 (1 << VERT_ATTRIB_GENERIC2)
 200 #define VERT_BIT_GENERIC3 (1 << VERT_ATTRIB_GENERIC3)
 201
 202 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 203 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 204 /*@}*/
 205
 206
 207 /**
 208  * Indexes for vertex program result attributes
 209  */
 210 #define VERT_RESULT_HPOS 0
 211 #define VERT_RESULT_COL0 1
 212 #define VERT_RESULT_COL1 2
 213 #define VERT_RESULT_BFC0 3
 214 #define VERT_RESULT_BFC1 4
 215 #define VERT_RESULT_FOGC 5
 216 #define VERT_RESULT_PSIZ 6
 217 #define VERT_RESULT_TEX0 7
 218 #define VERT_RESULT_TEX1 8
 219 #define VERT_RESULT_TEX2 9
 220 #define VERT_RESULT_TEX3 10
 221 #define VERT_RESULT_TEX4 11
 222 #define VERT_RESULT_TEX5 12
 223 #define VERT_RESULT_TEX6 13
 224 #define VERT_RESULT_TEX7 14
 225 #define VERT_RESULT_MAX  15
 226
 227
 228 /**
 229  * Indexes for fragment program input attributes.
 230  */
 231 enum
 232 {
 233    FRAG_ATTRIB_WPOS = 0,
 234    FRAG_ATTRIB_COL0 = 1,
 235    FRAG_ATTRIB_COL1 = 2,
 236    FRAG_ATTRIB_FOGC = 3,
 237    FRAG_ATTRIB_TEX0 = 4,
 238    FRAG_ATTRIB_TEX1 = 5,
 239    FRAG_ATTRIB_TEX2 = 6,
 240    FRAG_ATTRIB_TEX3 = 7,
 241    FRAG_ATTRIB_TEX4 = 8,
 242    FRAG_ATTRIB_TEX5 = 9,
 243    FRAG_ATTRIB_TEX6 = 10,
 244    FRAG_ATTRIB_TEX7 = 11
 245 };
 246
 247 /*
 248  * Bitflags for fragment attributes.
 249  */
 250 /*@{*/
 251 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 252 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 253 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 254 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 255 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 256 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 257 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 258 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 259 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 260 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 261 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 262 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 263
 264 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 265                            FRAG_BIT_TEX1|       \
 266                            FRAG_BIT_TEX2|       \
 267                            FRAG_BIT_TEX3|       \
 268                            FRAG_BIT_TEX4|       \
 269                            FRAG_BIT_TEX5|       \
 270                            FRAG_BIT_TEX6|       \
 271                            FRAG_BIT_TEX7)
 272 /*@}*/
 273
 274
 275 /**
 276  * Indexes for all renderbuffers
 277  */
 278 enum {
 279    BUFFER_FRONT_LEFT  = 0,  /* the four standard color buffers */
 280    BUFFER_BACK_LEFT   = 1,
 281    BUFFER_FRONT_RIGHT = 2,
 282    BUFFER_BACK_RIGHT  = 3,
 283    BUFFER_AUX0        = 4,  /* optional aux buffer */
 284    BUFFER_AUX1        = 5,
 285    BUFFER_AUX2        = 6,
 286    BUFFER_AUX3        = 7,
 287    BUFFER_DEPTH       = 8,
 288    BUFFER_STENCIL     = 9,
 289    BUFFER_ACCUM       = 10,
 290    BUFFER_COLOR0      = 11, /* generic renderbuffers */
 291    BUFFER_COLOR1      = 12,
 292    BUFFER_COLOR2      = 13,
 293    BUFFER_COLOR3      = 14,
 294    BUFFER_COLOR4      = 15,
 295    BUFFER_COLOR5      = 16,
 296    BUFFER_COLOR6      = 17,
 297    BUFFER_COLOR7      = 18,
 298    BUFFER_COUNT       = 19
 299 };
 300
 301 /**
 302  * Bit flags for all renderbuffers
 303  */
 304 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 305 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 306 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 307 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 308 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 309 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 310 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 311 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 312 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 313 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 314 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 315 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 316 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 317 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 318 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 319 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 320 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 321 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 322 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 323
 324
 325 /**
 326  * Data structure for color tables
 327  */
 328 struct gl_color_table
 329 {
 330    GLenum Format;         /**< GL_ALPHA, GL_RGB, GL_RGB, etc */
 331    GLenum IntFormat;
 332    GLuint Size;           /**< number of entries (rows) in table */
 333    GLvoid *Table;         /**< points to data of <Type> */
 334    GLenum Type;           /**< GL_UNSIGNED_BYTE or GL_FLOAT */
 335    GLubyte RedSize;
 336    GLubyte GreenSize;
 337    GLubyte BlueSize;
 338    GLubyte AlphaSize;
 339    GLubyte LuminanceSize;
 340    GLubyte IntensitySize;
 341 };
 342
 343
 344 /**
 345  * \name Bit flags used for updating material values.
 346  */
 347 /*@{*/
 348 #define MAT_ATTRIB_FRONT_AMBIENT           0
 349 #define MAT_ATTRIB_BACK_AMBIENT            1
 350 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 351 #define MAT_ATTRIB_BACK_DIFFUSE            3
 352 #define MAT_ATTRIB_FRONT_SPECULAR          4
 353 #define MAT_ATTRIB_BACK_SPECULAR           5
 354 #define MAT_ATTRIB_FRONT_EMISSION          6
 355 #define MAT_ATTRIB_BACK_EMISSION           7
 356 #define MAT_ATTRIB_FRONT_SHININESS         8
 357 #define MAT_ATTRIB_BACK_SHININESS          9
 358 #define MAT_ATTRIB_FRONT_INDEXES           10
 359 #define MAT_ATTRIB_BACK_INDEXES            11
 360 #define MAT_ATTRIB_MAX                     12
 361
 362 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 363 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 364 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 365 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 366 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 367 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 368
 369 #define MAT_INDEX_AMBIENT  0
 370 #define MAT_INDEX_DIFFUSE  1
 371 #define MAT_INDEX_SPECULAR 2
 372
 373 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 374 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 375 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 376 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 377 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 378 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 379 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 380 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 381 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 382 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 383 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 384 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 385
 386
 387 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 388                                  MAT_BIT_FRONT_AMBIENT |        \
 389                                  MAT_BIT_FRONT_DIFFUSE |        \
 390                                  MAT_BIT_FRONT_SPECULAR |       \
 391                                  MAT_BIT_FRONT_SHININESS |      \
 392                                  MAT_BIT_FRONT_INDEXES)
 393
 394 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 395                                  MAT_BIT_BACK_AMBIENT |         \
 396                                  MAT_BIT_BACK_DIFFUSE |         \
 397                                  MAT_BIT_BACK_SPECULAR |        \
 398                                  MAT_BIT_BACK_SHININESS |       \
 399                                  MAT_BIT_BACK_INDEXES)
 400
 401 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 402 /*@}*/
 403
 404
 405 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 406 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 407
 408 /**
 409  * Material shininess lookup table.
 410  */
 411 struct gl_shine_tab
 412 {
 413    struct gl_shine_tab *next, *prev;
 414    GLfloat tab[SHINE_TABLE_SIZE+1];
 415    GLfloat shininess;
 416    GLuint refcount;
 417 };
 418
 419
 420 /**
 421  * Light source state.
 422  */
 423 struct gl_light
 424 {
 425    struct gl_light *next;       /**< double linked list with sentinel */
 426    struct gl_light *prev;
 427
 428    GLfloat Ambient[4];          /**< ambient color */
 429    GLfloat Diffuse[4];          /**< diffuse color */
 430    GLfloat Specular[4];         /**< specular color */
 431    GLfloat EyePosition[4];      /**< position in eye coordinates */
 432    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 433    GLfloat SpotExponent;
 434    GLfloat SpotCutoff;          /**< in degrees */
 435    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 436    GLfloat ConstantAttenuation;
 437    GLfloat LinearAttenuation;
 438    GLfloat QuadraticAttenuation;
 439    GLboolean Enabled;           /**< On/off flag */
 440
 441    /**
 442     * \name Derived fields
 443     */
 444    /*@{*/
 445    GLbitfield _Flags;           /**< State */
 446
 447    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 448    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 449    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 450    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 451    GLfloat _VP_inf_spot_attenuation;
 452
 453    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 454    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 455    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 456    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 457    GLfloat _dli;                /**< CI diffuse light intensity */
 458    GLfloat _sli;                /**< CI specular light intensity */
 459    /*@}*/
 460 };
 461
 462
 463 /**
 464  * Light model state.
 465  */
 466 struct gl_lightmodel
 467 {
 468    GLfloat Ambient[4];          /**< ambient color */
 469    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 470    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 471    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 472                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 473 };
 474
 475
 476 /**
 477  * Material state.
 478  */
 479 struct gl_material
 480 {
 481    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 482 };
 483
 484
 485 /**
 486  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 487  */
 488 struct gl_accum_attrib
 489 {
 490    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 491 };
 492
 493
 494 /**
 495  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 496  */
 497 struct gl_colorbuffer_attrib
 498 {
 499    GLuint ClearIndex;                   /**< Index to use for glClear */
 500    GLclampf ClearColor[4];              /**< Color to use for glClear */
 501
 502    GLuint IndexMask;                    /**< Color index write mask */
 503    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 504
 505    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 506
 507    /**
 508     * \name alpha testing
 509     */
 510    /*@{*/
 511    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 512    GLenum AlphaFunc;                    /**< Alpha test function */
 513    GLclampf AlphaRef;                   /**< Alpha reference value */
 514    /*@}*/
 515
 516    /**
 517     * \name Blending
 518     */
 519    /*@{*/
 520    GLboolean BlendEnabled;              /**< Blending enabled flag */
 521    GLenum BlendSrcRGB;                  /**< Blending source operator */
 522    GLenum BlendDstRGB;                  /**< Blending destination operator */
 523    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 524    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 525    GLenum BlendEquationRGB;             /**< Blending equation */
 526    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 527    GLfloat BlendColor[4];               /**< Blending color */
 528    /*@}*/
 529
 530    /**
 531     * \name Logic op
 532     */
 533    /*@{*/
 534    GLenum LogicOp;                      /**< Logic operator */
 535    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 536    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 537    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 538    /*@}*/
 539
 540    GLboolean DitherFlag;                /**< Dither enable flag */
 541 };
 542
 543
 544 /**
 545  * Current attribute group (GL_CURRENT_BIT).
 546  */
 547 struct gl_current_attrib
 548 {
 549    /**
 550     * \name Values valid only when FLUSH_VERTICES has been called.
 551     */
 552    /*@{*/
 553    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 554                                                   *  indexed by VERT_ATTRIB_* */
 555    GLfloat Index;                               /**< Current color index */
 556    GLboolean EdgeFlag;                          /**< Current edge flag */
 557    /*@}*/
 558
 559    /**
 560     * \name Values are always valid.
 561     *
 562     * \note BTW, note how similar this set of attributes is to the SWvertex
 563     * data type in the software rasterizer...
 564     */
 565    /*@{*/
 566    GLfloat RasterPos[4];                        /**< Current raster position */
 567    GLfloat RasterDistance;                      /**< Current raster distance */
 568    GLfloat RasterColor[4];                      /**< Current raster color */
 569    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 570    GLfloat RasterIndex;                         /**< Current raster index */
 571    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 572    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 573    /*@}*/
 574 };
 575
 576
 577 /**
 578  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 579  */
 580 struct gl_depthbuffer_attrib
 581 {
 582    GLenum Func;                 /**< Function for depth buffer compare */
 583    GLclampd Clear;              /**< Value to clear depth buffer to */
 584    GLboolean Test;              /**< Depth buffering enabled flag */
 585    GLboolean Mask;              /**< Depth buffer writable? */
 586    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 587    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 588 };
 589
 590
 591 /**
 592  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
 593  */
 594 struct gl_enable_attrib
 595 {
 596    GLboolean AlphaTest;
 597    GLboolean AutoNormal;
 598    GLboolean Blend;
 599    GLbitfield ClipPlanes;
 600    GLboolean ColorMaterial;
 601    GLboolean ColorTable;                /* SGI_color_table */
 602    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 603    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 604    GLboolean Convolution1D;
 605    GLboolean Convolution2D;
 606    GLboolean Separable2D;
 607    GLboolean CullFace;
 608    GLboolean DepthTest;
 609    GLboolean Dither;
 610    GLboolean Fog;
 611    GLboolean Histogram;
 612    GLboolean Light[MAX_LIGHTS];
 613    GLboolean Lighting;
 614    GLboolean LineSmooth;
 615    GLboolean LineStipple;
 616    GLboolean IndexLogicOp;
 617    GLboolean ColorLogicOp;
 618    GLboolean Map1Color4;
 619    GLboolean Map1Index;
 620    GLboolean Map1Normal;
 621    GLboolean Map1TextureCoord1;
 622    GLboolean Map1TextureCoord2;
 623    GLboolean Map1TextureCoord3;
 624    GLboolean Map1TextureCoord4;
 625    GLboolean Map1Vertex3;
 626    GLboolean Map1Vertex4;
 627    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 628    GLboolean Map2Color4;
 629    GLboolean Map2Index;
 630    GLboolean Map2Normal;
 631    GLboolean Map2TextureCoord1;
 632    GLboolean Map2TextureCoord2;
 633    GLboolean Map2TextureCoord3;
 634    GLboolean Map2TextureCoord4;
 635    GLboolean Map2Vertex3;
 636    GLboolean Map2Vertex4;
 637    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 638    GLboolean MinMax;
 639    GLboolean Normalize;
 640    GLboolean PixelTexture;
 641    GLboolean PointSmooth;
 642    GLboolean PolygonOffsetPoint;
 643    GLboolean PolygonOffsetLine;
 644    GLboolean PolygonOffsetFill;
 645    GLboolean PolygonSmooth;
 646    GLboolean PolygonStipple;
 647    GLboolean RescaleNormals;
 648    GLboolean Scissor;
 649    GLboolean Stencil;
 650    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 651    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 652    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 653    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 654    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 655    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 656    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 657    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 658    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 659    /* SGI_texture_color_table */
 660    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 661    /* GL_NV_vertex_program */
 662    GLboolean VertexProgram;
 663    GLboolean VertexProgramPointSize;
 664    GLboolean VertexProgramTwoSide;
 665    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 666    GLboolean PointSprite;
 667    GLboolean FragmentShaderATI;
 668 };
 669
 670
 671 /**
 672  * Evaluator attribute group (GL_EVAL_BIT).
 673  */
 674 struct gl_eval_attrib
 675 {
 676    /**
 677     * \name Enable bits
 678     */
 679    /*@{*/
 680    GLboolean Map1Color4;
 681    GLboolean Map1Index;
 682    GLboolean Map1Normal;
 683    GLboolean Map1TextureCoord1;
 684    GLboolean Map1TextureCoord2;
 685    GLboolean Map1TextureCoord3;
 686    GLboolean Map1TextureCoord4;
 687    GLboolean Map1Vertex3;
 688    GLboolean Map1Vertex4;
 689    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 690    GLboolean Map2Color4;
 691    GLboolean Map2Index;
 692    GLboolean Map2Normal;
 693    GLboolean Map2TextureCoord1;
 694    GLboolean Map2TextureCoord2;
 695    GLboolean Map2TextureCoord3;
 696    GLboolean Map2TextureCoord4;
 697    GLboolean Map2Vertex3;
 698    GLboolean Map2Vertex4;
 699    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 700    GLboolean AutoNormal;
 701    /*@}*/
 702
 703    /**
 704     * \name Map Grid endpoints and divisions and calculated du values
 705     */
 706    /*@{*/
 707    GLint MapGrid1un;
 708    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 709    GLint MapGrid2un, MapGrid2vn;
 710    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 711    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 712    /*@}*/
 713 };
 714
 715
 716 /**
 717  * Fog attribute group (GL_FOG_BIT).
 718  */
 719 struct gl_fog_attrib
 720 {
 721    GLboolean Enabled;           /**< Fog enabled flag */
 722    GLfloat Color[4];            /**< Fog color */
 723    GLfloat Density;             /**< Density >= 0.0 */
 724    GLfloat Start;               /**< Start distance in eye coords */
 725    GLfloat End;                 /**< End distance in eye coords */
 726    GLfloat Index;               /**< Fog index */
 727    GLenum Mode;                 /**< Fog mode */
 728    GLboolean ColorSumEnabled;
 729    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 730 };
 731
 732
 733 /**
 734  * Hint attribute group (GL_HINT_BIT).
 735  *
 736  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 737  */
 738 struct gl_hint_attrib
 739 {
 740    GLenum PerspectiveCorrection;
 741    GLenum PointSmooth;
 742    GLenum LineSmooth;
 743    GLenum PolygonSmooth;
 744    GLenum Fog;
 745    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 746    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 747    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 748    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 749 };
 750
 751
 752 /**
 753  * Histogram attributes.
 754  */
 755 struct gl_histogram_attrib
 756 {
 757    GLuint Width;                                /**< number of table entries */
 758    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 759    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 760    GLboolean Sink;                              /**< terminate image transfer? */
 761    GLubyte RedSize;                             /**< Bits per counter */
 762    GLubyte GreenSize;
 763    GLubyte BlueSize;
 764    GLubyte AlphaSize;
 765    GLubyte LuminanceSize;
 766 };
 767
 768
 769 /**
 770  * Color Min/max state.
 771  */
 772 struct gl_minmax_attrib
 773 {
 774    GLenum Format;
 775    GLboolean Sink;
 776    GLfloat Min[4], Max[4];   /**< RGBA */
 777 };
 778
 779
 780 /**
 781  * Image convolution state.
 782  */
 783 struct gl_convolution_attrib
 784 {
 785    GLenum Format;
 786    GLenum InternalFormat;
 787    GLuint Width;
 788    GLuint Height;
 789    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 790 };
 791
 792
 793 /**
 794  * Light state flags.
 795  */
 796 /*@{*/
 797 #define LIGHT_SPOT         0x1
 798 #define LIGHT_LOCAL_VIEWER 0x2
 799 #define LIGHT_POSITIONAL   0x4
 800 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 801 /*@}*/
 802
 803
 804 /**
 805  * Lighting attribute group (GL_LIGHT_BIT).
 806  */
 807 struct gl_light_attrib
 808 {
 809    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 810    struct gl_lightmodel Model;          /**< Lighting model */
 811
 812    /**
 813     * Must flush FLUSH_VERTICES before referencing:
 814     */
 815    /*@{*/
 816    struct gl_material Material;         /**< Includes front & back values */
 817    /*@}*/
 818
 819    GLboolean Enabled;                   /**< Lighting enabled flag */
 820    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 821    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 822    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 823    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 824    GLboolean ColorMaterialEnabled;
 825
 826    struct gl_light EnabledList;         /**< List sentinel */
 827
 828    /**
 829     * Derived state for optimizations:
 830     */
 831    /*@{*/
 832    GLboolean _NeedEyeCoords;
 833    GLboolean _NeedVertices;             /**< Use fast shader? */
 834    GLbitfield  _Flags;                  /**< LIGHT_* flags, see above */
 835    GLfloat _BaseColor[2][3];
 836    /*@}*/
 837 };
 838
 839
 840 /**
 841  * Line attribute group (GL_LINE_BIT).
 842  */
 843 struct gl_line_attrib
 844 {
 845    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 846    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 847    GLushort StipplePattern;     /**< Stipple pattern */
 848    GLint StippleFactor;         /**< Stipple repeat factor */
 849    GLfloat Width;               /**< Line width */
 850    GLfloat _Width;              /**< Clamped Line width */
 851 };
 852
 853
 854 /**
 855  * Display list attribute group (GL_LIST_BIT).
 856  */
 857 struct gl_list_attrib
 858 {
 859    GLuint ListBase;
 860 };
 861
 862
 863 /**
 864  * Used by device drivers to hook new commands into display lists.
 865  */
 866 struct gl_list_instruction
 867 {
 868    GLuint Size;
 869    void (*Execute)( GLcontext *ctx, void *data );
 870    void (*Destroy)( GLcontext *ctx, void *data );
 871    void (*Print)( GLcontext *ctx, void *data );
 872 };
 873
 874 #define MAX_DLIST_EXT_OPCODES 16
 875
 876 /**
 877  * Used by device drivers to hook new commands into display lists.
 878  */
 879 struct gl_list_extensions
 880 {
 881    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 882    GLuint NumOpcodes;
 883 };
 884
 885
 886 /**
 887  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 888  */
 889 struct gl_multisample_attrib
 890 {
 891    GLboolean Enabled;
 892    GLboolean SampleAlphaToCoverage;
 893    GLboolean SampleAlphaToOne;
 894    GLboolean SampleCoverage;
 895    GLfloat SampleCoverageValue;
 896    GLboolean SampleCoverageInvert;
 897 };
 898
 899
 900 /**
 901  * Pixel attribute group (GL_PIXEL_MODE_BIT).
 902  */
 903 struct gl_pixel_attrib
 904 {
 905    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
 906    GLfloat RedBias, RedScale;
 907    GLfloat GreenBias, GreenScale;
 908    GLfloat BlueBias, BlueScale;
 909    GLfloat AlphaBias, AlphaScale;
 910    GLfloat DepthBias, DepthScale;
 911    GLint IndexShift, IndexOffset;
 912    GLboolean MapColorFlag;
 913    GLboolean MapStencilFlag;
 914    GLfloat ZoomX, ZoomY;
 915    /* XXX move these out of gl_pixel_attrib */
 916    GLint MapStoSsize;           /**< Size of each pixel map */
 917    GLint MapItoIsize;
 918    GLint MapItoRsize;
 919    GLint MapItoGsize;
 920    GLint MapItoBsize;
 921    GLint MapItoAsize;
 922    GLint MapRtoRsize;
 923    GLint MapGtoGsize;
 924    GLint MapBtoBsize;
 925    GLint MapAtoAsize;
 926    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 927    GLfloat MapItoI[MAX_PIXEL_MAP_TABLE];
 928    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 929    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 930    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 931    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 932    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 933    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 934    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 935    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 936    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 937    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 938    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 939    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 940    /** GL_EXT_histogram */
 941    GLboolean HistogramEnabled;
 942    GLboolean MinMaxEnabled;
 943    /** GL_SGIS_pixel_texture */
 944    GLboolean PixelTextureEnabled;
 945    GLenum FragmentRgbSource;
 946    GLenum FragmentAlphaSource;
 947    /** GL_SGI_color_matrix */
 948    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 949    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 950    /** GL_SGI_color_table */
 951    GLfloat ColorTableScale[4];
 952    GLfloat ColorTableBias[4];
 953    GLboolean ColorTableEnabled;
 954    GLfloat PCCTscale[4];
 955    GLfloat PCCTbias[4];
 956    GLboolean PostConvolutionColorTableEnabled;
 957    GLfloat PCMCTscale[4];
 958    GLfloat PCMCTbias[4];
 959    GLboolean PostColorMatrixColorTableEnabled;
 960    /** GL_SGI_texture_color_table */
 961    GLfloat TextureColorTableScale[4];
 962    GLfloat TextureColorTableBias[4];
 963    /** Convolution */
 964    GLboolean Convolution1DEnabled;
 965    GLboolean Convolution2DEnabled;
 966    GLboolean Separable2DEnabled;
 967    GLfloat ConvolutionBorderColor[3][4];
 968    GLenum ConvolutionBorderMode[3];
 969    GLfloat ConvolutionFilterScale[3][4];
 970    GLfloat ConvolutionFilterBias[3][4];
 971    GLfloat PostConvolutionScale[4];  /**< RGBA */
 972    GLfloat PostConvolutionBias[4];   /**< RGBA */
 973 };
 974
 975
 976 /**
 977  * Point attribute group (GL_POINT_BIT).
 978  */
 979 struct gl_point_attrib
 980 {
 981    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 982    GLfloat Size;                /**< User-specified point size */
 983    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
 984    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 985    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 986    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 987    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 988    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
 989    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV/ARB_point_sprite */
 990    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 991    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
 992 };
 993
 994
 995 /**
 996  * Polygon attribute group (GL_POLYGON_BIT).
 997  */
 998 struct gl_polygon_attrib
 999 {
1000    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1001    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1002    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1003    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1004    GLboolean CullFlag;          /**< Culling on/off flag */
1005    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1006    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1007    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1008    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1009    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1010    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1011    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1012    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1013 };
1014
1015
1016 /**
1017  * Scissor attributes (GL_SCISSOR_BIT).
1018  */
1019 struct gl_scissor_attrib
1020 {
1021    GLboolean Enabled;           /**< Scissor test enabled? */
1022    GLint X, Y;                  /**< Lower left corner of box */
1023    GLsizei Width, Height;       /**< Size of box */
1024 };
1025
1026
1027 /**
1028  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1029  */
1030 struct gl_stencil_attrib
1031 {
1032    GLboolean Enabled;           /**< Enabled flag */
1033    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1034    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1035    GLboolean _TestTwoSide;
1036    GLenum Function[2];          /**< Stencil function */
1037    GLenum FailFunc[2];          /**< Fail function */
1038    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1039    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1040    GLint Ref[2];                /**< Reference value */
1041    GLuint ValueMask[2];         /**< Value mask */
1042    GLuint WriteMask[2];         /**< Write mask */
1043    GLuint Clear;                /**< Clear value */
1044 };
1045
1046
1047 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
1048
1049 /**
1050  * An index for each type of texture object
1051  */
1052 /*@{*/
1053 #define TEXTURE_1D_INDEX    0
1054 #define TEXTURE_2D_INDEX    1
1055 #define TEXTURE_3D_INDEX    2
1056 #define TEXTURE_CUBE_INDEX  3
1057 #define TEXTURE_RECT_INDEX  4
1058 /*@}*/
1059
1060 /**
1061  * Bit flags for each type of texture object
1062  * Used for Texture.Unit[]._ReallyEnabled flags.
1063  */
1064 /*@{*/
1065 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
1066 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
1067 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
1068 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
1069 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
1070 /*@}*/
1071
1072
1073 /**
1074  * TexGenEnabled flags.
1075  */
1076 /*@{*/
1077 #define S_BIT 1
1078 #define T_BIT 2
1079 #define R_BIT 4
1080 #define Q_BIT 8
1081 /*@}*/
1082
1083
1084 /**
1085  * Bit flag versions of the corresponding GL_ constants.
1086  */
1087 /*@{*/
1088 #define TEXGEN_SPHERE_MAP        0x1
1089 #define TEXGEN_OBJ_LINEAR        0x2
1090 #define TEXGEN_EYE_LINEAR        0x4
1091 #define TEXGEN_REFLECTION_MAP_NV 0x8
1092 #define TEXGEN_NORMAL_MAP_NV     0x10
1093
1094 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1095                                   TEXGEN_REFLECTION_MAP_NV | \
1096                                   TEXGEN_NORMAL_MAP_NV)
1097 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1098                                   TEXGEN_REFLECTION_MAP_NV | \
1099                                   TEXGEN_NORMAL_MAP_NV     | \
1100                                   TEXGEN_EYE_LINEAR)
1101 /*@}*/
1102
1103
1104 /* A selection of state flags to make driver and module's lives easier. */
1105 #define ENABLE_TEXGEN0        0x1
1106 #define ENABLE_TEXGEN1        0x2
1107 #define ENABLE_TEXGEN2        0x4
1108 #define ENABLE_TEXGEN3        0x8
1109 #define ENABLE_TEXGEN4        0x10
1110 #define ENABLE_TEXGEN5        0x20
1111 #define ENABLE_TEXGEN6        0x40
1112 #define ENABLE_TEXGEN7        0x80
1113
1114 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1115 #define ENABLE_TEXMAT1        0x2
1116 #define ENABLE_TEXMAT2        0x4
1117 #define ENABLE_TEXMAT3        0x8
1118 #define ENABLE_TEXMAT4        0x10
1119 #define ENABLE_TEXMAT5        0x20
1120 #define ENABLE_TEXMAT6        0x40
1121 #define ENABLE_TEXMAT7        0x80
1122
1123 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1124 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1125
1126
1127 /**
1128  * Texel fetch function prototype.  We use texel fetch functions to
1129  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1130  * texture images.  These functions help to isolate us from the gritty
1131  * details of all the various texture image encodings.
1132  *
1133  * \param texImage texture image.
1134  * \param col texel column.
1135  * \param row texel row.
1136  * \param img texel image level/layer.
1137  * \param texelOut output texel (up to 4 GLchans)
1138  */
1139 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1140                                  GLint col, GLint row, GLint img,
1141                                  GLchan *texelOut );
1142
1143 /**
1144  * As above, but returns floats.
1145  * Used for depth component images and for upcoming signed/float
1146  * texture images.
1147  */
1148 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1149                                  GLint col, GLint row, GLint img,
1150                                  GLfloat *texelOut );
1151
1152
1153 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1154                                GLint col, GLint row, GLint img,
1155                                const void *texel);
1156
1157 /**
1158  * TexImage store function.  This is called by the glTex[Sub]Image
1159  * functions and is responsible for converting the user-specified texture
1160  * image into a specific (hardware) image format.
1161  */
1162 typedef GLboolean (*StoreTexImageFunc)(GLcontext *ctx, GLuint dims,
1163                           GLenum baseInternalFormat,
1164                           const struct gl_texture_format *dstFormat,
1165                           GLvoid *dstAddr,
1166                           GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
1167                           GLint dstRowStride, GLint dstImageStride,
1168                           GLint srcWidth, GLint srcHeight, GLint srcDepth,
1169                           GLenum srcFormat, GLenum srcType,
1170                           const GLvoid *srcAddr,
1171                           const struct gl_pixelstore_attrib *srcPacking);
1172
1173
1174
1175 /**
1176  * Texture format record
1177  */
1178 struct gl_texture_format
1179 {
1180    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1181
1182    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1183                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1184                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1185                                  *   GL_DEPTH_COMPONENT.
1186                                  */
1187    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1188    GLubyte RedBits;             /**< Bits per texel component */
1189    GLubyte GreenBits;           /**< These are just rough approximations for */
1190    GLubyte BlueBits;            /**< compressed texture formats. */
1191    GLubyte AlphaBits;
1192    GLubyte LuminanceBits;
1193    GLubyte IntensityBits;
1194    GLubyte IndexBits;
1195    GLubyte DepthBits;
1196
1197    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1198
1199    StoreTexImageFunc StoreImage;
1200
1201    /**
1202     * \name Texel fetch function pointers
1203     */
1204    /*@{*/
1205    FetchTexelFuncC FetchTexel1D;
1206    FetchTexelFuncC FetchTexel2D;
1207    FetchTexelFuncC FetchTexel3D;
1208    FetchTexelFuncF FetchTexel1Df;
1209    FetchTexelFuncF FetchTexel2Df;
1210    FetchTexelFuncF FetchTexel3Df;
1211    /*@}*/
1212
1213    StoreTexelFunc StoreTexel;
1214 };
1215
1216
1217 /**
1218  * Texture image state.  Describes the dimensions of a texture image,
1219  * the texel format and pointers to Texel Fetch functions.
1220  */
1221 struct gl_texture_image
1222 {
1223    GLenum Format;               /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1224                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1225                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1226                                  *   GL_DEPTH_COMPONENT only.
1227                                  *   Used for choosing TexEnv arithmetic.
1228                                  */
1229    GLint IntFormat;             /**< Internal format as given by the user */
1230    GLuint Border;               /**< 0 or 1 */
1231    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1232    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1233    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1234    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1235    GLuint Width2;               /**< = Width - 2*Border */
1236    GLuint Height2;              /**< = Height - 2*Border */
1237    GLuint Depth2;               /**< = Depth - 2*Border */
1238    GLuint WidthLog2;            /**< = log2(Width2) */
1239    GLuint HeightLog2;           /**< = log2(Height2) */
1240    GLuint DepthLog2;            /**< = log2(Depth2) */
1241    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1242    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1243    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1244    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1245    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1246    GLboolean IsClientData;      /**< Data owned by client? */
1247    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1248
1249    const struct gl_texture_format *TexFormat;
1250
1251    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1252
1253    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1254    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1255
1256    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1257    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1258
1259    /**
1260     * \name For device driver:
1261     */
1262    /*@{*/
1263    void *DriverData;            /**< Arbitrary device driver data */
1264    /*@}*/
1265 };
1266
1267
1268 /**
1269  * Indexes for cube map faces.
1270  */
1271 /*@{*/
1272 #define FACE_POS_X   0
1273 #define FACE_NEG_X   1
1274 #define FACE_POS_Y   2
1275 #define FACE_NEG_Y   3
1276 #define FACE_POS_Z   4
1277 #define FACE_NEG_Z   5
1278 #define MAX_FACES  6
1279 /*@}*/
1280
1281
1282 /**
1283  * Texture object state.  Contains the array of mipmap images, border color,
1284  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1285  * color palette.
1286  */
1287 struct gl_texture_object
1288 {
1289    _glthread_Mutex Mutex;       /**< for thread safety */
1290    GLint RefCount;              /**< reference count */
1291    GLuint Name;                 /**< the user-visible texture object ID */
1292    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1293    GLfloat Priority;            /**< in [0,1] */
1294    GLfloat BorderColor[4];      /**< unclamped */
1295    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1296    GLenum WrapS;                /**< S-axis texture image wrap mode */
1297    GLenum WrapT;                /**< T-axis texture image wrap mode */
1298    GLenum WrapR;                /**< R-axis texture image wrap mode */
1299    GLenum MinFilter;            /**< minification filter */
1300    GLenum MagFilter;            /**< magnification filter */
1301    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1302    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1303    GLfloat LodBias;             /**< OpenGL 1.4 */
1304    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1305    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1306    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1307    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1308    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1309    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1310    GLenum CompareMode;          /**< GL_ARB_shadow */
1311    GLenum CompareFunc;          /**< GL_ARB_shadow */
1312    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1313    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1314    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1315    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1316    GLboolean _IsPowerOfTwo;     /**< Are all image dimensions powers of two? */
1317    GLboolean Complete;          /**< Is texture object complete? */
1318
1319    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1320    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1321
1322    /** GL_EXT_paletted_texture */
1323    struct gl_color_table Palette;
1324
1325
1326    /**
1327     * \name For device driver.
1328     * Note: instead of attaching driver data to this pointer, it's preferable
1329     * to instead use this struct as a base class for your own texture object
1330     * class.  Driver->NewTextureObject() can be used to implement the
1331     * allocation.
1332     */
1333    void *DriverData;    /**< Arbitrary device driver data */
1334 };
1335
1336
1337 /**
1338  * Texture combine environment state.
1339  *
1340  * \todo
1341  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1342  * structure will need to be expanded for 4 elements.
1343  */
1344 struct gl_tex_env_combine_state
1345 {
1346    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1347    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1348    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1349    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1350    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1351    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1352    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1353    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1354    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1355    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1356 };
1357
1358
1359 /**
1360  * Texture unit state.  Contains enable flags, texture environment/function/
1361  * combiners, texgen state, pointers to current texture objects and
1362  * post-filter color tables.
1363  */
1364 struct gl_texture_unit
1365 {
1366    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1367    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1368
1369    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1370    GLfloat EnvColor[4];
1371    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1372    /** \name Tex coord generation mode
1373     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1374    /*@{*/
1375    GLenum GenModeS;
1376    GLenum GenModeT;
1377    GLenum GenModeR;
1378    GLenum GenModeQ;
1379    /*@}*/
1380    GLbitfield _GenBitS;
1381    GLbitfield _GenBitT;
1382    GLbitfield _GenBitR;
1383    GLbitfield _GenBitQ;
1384    GLbitfield _GenFlags;        /**< bitwise or of GenBit[STRQ] */
1385    GLfloat ObjectPlaneS[4];
1386    GLfloat ObjectPlaneT[4];
1387    GLfloat ObjectPlaneR[4];
1388    GLfloat ObjectPlaneQ[4];
1389    GLfloat EyePlaneS[4];
1390    GLfloat EyePlaneT[4];
1391    GLfloat EyePlaneR[4];
1392    GLfloat EyePlaneQ[4];
1393    GLfloat LodBias;             /**< for biasing mipmap levels */
1394
1395    /**
1396     * \name GL_EXT_texture_env_combine
1397     */
1398    struct gl_tex_env_combine_state Combine;
1399
1400    /**
1401     * Derived state based on \c EnvMode and the \c BaseFormat of the
1402     * currently enabled texture.
1403     */
1404    struct gl_tex_env_combine_state _EnvMode;
1405
1406    /**
1407     * Currently enabled combiner state.  This will point to either
1408     * \c Combine or \c _EnvMode.
1409     */
1410    struct gl_tex_env_combine_state *_CurrentCombine;
1411
1412    struct gl_texture_object *Current1D;
1413    struct gl_texture_object *Current2D;
1414    struct gl_texture_object *Current3D;
1415    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1416    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1417
1418    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1419
1420    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1421    struct gl_texture_object Saved2D;
1422    struct gl_texture_object Saved3D;
1423    struct gl_texture_object SavedCubeMap;
1424    struct gl_texture_object SavedRect;
1425
1426    /* GL_SGI_texture_color_table */
1427    struct gl_color_table ColorTable;
1428    struct gl_color_table ProxyColorTable;
1429    GLboolean ColorTableEnabled;
1430 };
1431
1432 struct texenvprog_cache {
1433    GLuint hash;
1434    void *key;
1435    void *data;
1436    struct texenvprog_cache *next;
1437 };
1438
1439 /**
1440  * Texture attribute group (GL_TEXTURE_BIT).
1441  */
1442 struct gl_texture_attrib
1443 {
1444    /**
1445     * name multitexture
1446     */
1447    /**@{*/
1448    GLuint CurrentUnit;         /**< Active texture unit */
1449    GLbitfield _EnabledUnits;  /**< one bit set for each really-enabled unit */
1450    GLbitfield _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1451    GLbitfield _GenFlags;            /**< for texgen */
1452    GLbitfield _TexGenEnabled;
1453    GLbitfield _TexMatEnabled;
1454    /**@}*/
1455
1456    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1457
1458    struct gl_texture_object *Proxy1D;
1459    struct gl_texture_object *Proxy2D;
1460    struct gl_texture_object *Proxy3D;
1461    struct gl_texture_object *ProxyCubeMap;
1462    struct gl_texture_object *ProxyRect;
1463
1464    /** GL_EXT_shared_texture_palette */
1465    GLboolean SharedPalette;
1466    struct gl_color_table Palette;
1467
1468    /** Cached texenv fragment programs */
1469    struct texenvprog_cache *env_fp_cache;
1470 };
1471
1472
1473 /**
1474  * Transformation attribute group (GL_TRANSFORM_BIT).
1475  */
1476 struct gl_transform_attrib
1477 {
1478    GLenum MatrixMode;                           /**< Matrix mode */
1479    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1480    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1481    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1482    GLboolean Normalize;                         /**< Normalize all normals? */
1483    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1484    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1485
1486    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1487    GLfloat CullEyePos[4];
1488    GLfloat CullObjPos[4];
1489 };
1490
1491
1492 /**
1493  * Viewport attribute group (GL_VIEWPORT_BIT).
1494  */
1495 struct gl_viewport_attrib
1496 {
1497    GLint X, Y;                  /**< position */
1498    GLsizei Width, Height;       /**< size */
1499    GLfloat Near, Far;           /**< Depth buffer range */
1500    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1501 };
1502
1503
1504 /**
1505  * Node for the attribute stack.
1506  */
1507 struct gl_attrib_node
1508 {
1509    GLbitfield kind;
1510    void *data;
1511    struct gl_attrib_node *next;
1512 };
1513
1514
1515 /**
1516  * GL_ARB_vertex/pixel_buffer_object buffer object
1517  */
1518 struct gl_buffer_object
1519 {
1520    GLint RefCount;
1521    GLuint Name;
1522    GLenum Usage;
1523    GLenum Access;
1524    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1525    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1526    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1527    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1528 };
1529
1530
1531
1532 /**
1533  * Client pixel packing/unpacking attributes
1534  */
1535 struct gl_pixelstore_attrib
1536 {
1537    GLint Alignment;
1538    GLint RowLength;
1539    GLint SkipPixels;
1540    GLint SkipRows;
1541    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1542    GLint SkipImages;      /**< for GL_EXT_texture3D */
1543    GLboolean SwapBytes;
1544    GLboolean LsbFirst;
1545    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1546    GLboolean Invert;        /**< GL_MESA_pack_invert */
1547    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1548 };
1549
1550
1551 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1552
1553
1554 /**
1555  * Client vertex array attributes
1556  */
1557 struct gl_client_array
1558 {
1559    GLint Size;                  /**< components per element (1,2,3,4) */
1560    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1561    GLsizei Stride;              /**< user-specified stride */
1562    GLsizei StrideB;             /**< actual stride in bytes */
1563    const GLubyte *Ptr;          /**< Points to array data */
1564    GLbitfield Enabled;          /**< one of the _NEW_ARRAY_ bits */
1565    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1566
1567    /**< GL_ARB_vertex_buffer_object */
1568    struct gl_buffer_object *BufferObj;
1569    GLuint _MaxElement;
1570
1571    GLbitfield Flags;
1572 };
1573
1574
1575 /**
1576  * Vertex array state
1577  */
1578 struct gl_array_attrib
1579 {
1580    struct gl_client_array Vertex;            /**< client data descriptors */
1581    struct gl_client_array Normal;
1582    struct gl_client_array Color;
1583    struct gl_client_array SecondaryColor;
1584    struct gl_client_array FogCoord;
1585    struct gl_client_array Index;
1586    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1587    struct gl_client_array EdgeFlag;
1588
1589    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1590
1591    GLint ActiveTexture;         /**< Client Active Texture */
1592    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1593    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1594
1595    GLbitfield _Enabled;         /**< _NEW_ARRAY_* - bit set if array enabled */
1596    GLbitfield NewState;         /**< _NEW_ARRAY_* */
1597
1598 #if FEATURE_ARB_vertex_buffer_object
1599    struct gl_buffer_object *NullBufferObj;
1600    struct gl_buffer_object *ArrayBufferObj;
1601    struct gl_buffer_object *ElementArrayBufferObj;
1602 #endif
1603    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1604 };
1605
1606
1607 /**
1608  * Feedback buffer state
1609  */
1610 struct gl_feedback
1611 {
1612    GLenum Type;
1613    GLbitfield _Mask;            /* FB_* bits */
1614    GLfloat *Buffer;
1615    GLuint BufferSize;
1616    GLuint Count;
1617 };
1618
1619
1620 /**
1621  * Selection buffer state
1622  */
1623 struct gl_selection
1624 {
1625    GLuint *Buffer;      /**< selection buffer */
1626    GLuint BufferSize;   /**< size of the selection buffer */
1627    GLuint BufferCount;  /**< number of values in the selection buffer */
1628    GLuint Hits;         /**< number of records in the selection buffer */
1629    GLuint NameStackDepth; /**< name stack depth */
1630    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1631    GLboolean HitFlag;   /**< hit flag */
1632    GLfloat HitMinZ;     /**< minimum hit depth */
1633    GLfloat HitMaxZ;     /**< maximum hit depth */
1634 };
1635
1636
1637 /**
1638  * 1-D Evaluator control points
1639  */
1640 struct gl_1d_map
1641 {
1642    GLuint Order;        /**< Number of control points */
1643    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1644    GLfloat *Points;     /**< Points to contiguous control points */
1645 };
1646
1647
1648 /**
1649  * 2-D Evaluator control points
1650  */
1651 struct gl_2d_map
1652 {
1653    GLuint Uorder;               /**< Number of control points in U dimension */
1654    GLuint Vorder;               /**< Number of control points in V dimension */
1655    GLfloat u1, u2, du;
1656    GLfloat v1, v2, dv;
1657    GLfloat *Points;             /**< Points to contiguous control points */
1658 };
1659
1660
1661 /**
1662  * All evaluator control point state
1663  */
1664 struct gl_evaluators
1665 {
1666    /**
1667     * \name 1-D maps
1668     */
1669    /*@{*/
1670    struct gl_1d_map Map1Vertex3;
1671    struct gl_1d_map Map1Vertex4;
1672    struct gl_1d_map Map1Index;
1673    struct gl_1d_map Map1Color4;
1674    struct gl_1d_map Map1Normal;
1675    struct gl_1d_map Map1Texture1;
1676    struct gl_1d_map Map1Texture2;
1677    struct gl_1d_map Map1Texture3;
1678    struct gl_1d_map Map1Texture4;
1679    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1680    /*@}*/
1681
1682    /**
1683     * \name 2-D maps
1684     */
1685    /*@{*/
1686    struct gl_2d_map Map2Vertex3;
1687    struct gl_2d_map Map2Vertex4;
1688    struct gl_2d_map Map2Index;
1689    struct gl_2d_map Map2Color4;
1690    struct gl_2d_map Map2Normal;
1691    struct gl_2d_map Map2Texture1;
1692    struct gl_2d_map Map2Texture2;
1693    struct gl_2d_map Map2Texture3;
1694    struct gl_2d_map Map2Texture4;
1695    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1696    /*@}*/
1697 };
1698
1699
1700 /**
1701  * NV_fragment_program runtime state
1702  */
1703 struct fp_machine
1704 {
1705    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1706    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1707    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1708    GLuint CondCodes[4];
1709 };
1710
1711 /**
1712  * ATI_fragment_shader runtime state
1713  */
1714 #define ATI_FS_INPUT_PRIMARY 0
1715 #define ATI_FS_INPUT_SECONDARY 1
1716
1717 /* 6 register sets - 2 inputs (primary, secondary) */
1718 struct atifs_machine
1719 {
1720    GLfloat Registers[6][4];
1721    GLfloat PrevPassRegisters[6][4];
1722    GLfloat Inputs[2][4];
1723    GLuint pass;
1724 };
1725
1726
1727 /**
1728  * Names of the various vertex/fragment register files
1729  */
1730 enum register_file
1731 {
1732    PROGRAM_TEMPORARY,
1733    PROGRAM_INPUT,
1734    PROGRAM_OUTPUT,
1735    PROGRAM_LOCAL_PARAM,
1736    PROGRAM_ENV_PARAM,
1737    PROGRAM_NAMED_PARAM,
1738    PROGRAM_STATE_VAR,
1739    PROGRAM_WRITE_ONLY,
1740    PROGRAM_ADDRESS,
1741    PROGRAM_UNDEFINED   /* invalid value */
1742 };
1743
1744
1745 /** Vertex and fragment instructions */
1746 struct vp_instruction;
1747 struct fp_instruction;
1748 struct atifs_instruction;
1749 struct atifs_setupinst;
1750 struct program_parameter_list;
1751
1752
1753 /**
1754  * Base class for any kind of program object
1755  */
1756 struct program
1757 {
1758    GLuint Id;
1759    GLubyte *String;          /**< Null-terminated program text */
1760    GLint RefCount;
1761    GLenum Target;
1762    GLenum Format;            /**< String encoding format */
1763    GLboolean Resident;
1764    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1765    GLuint NumInstructions;  /* GL_ARB_vertex/fragment_program */
1766    GLuint NumTemporaries;
1767    GLuint NumParameters;
1768    GLuint NumAttributes;
1769    GLuint NumAddressRegs;
1770 };
1771
1772
1773 /** Vertex program object */
1774 struct vertex_program
1775 {
1776    struct program Base;   /* base class */
1777    struct vp_instruction *Instructions;  /* Compiled instructions */
1778    GLboolean IsNVProgram; /* GL_NV_vertex_program ? */
1779    GLboolean IsPositionInvariant;  /* GL_NV_vertex_program1_1 */
1780    GLbitfield InputsRead;     /* Bitmask of which input regs are read */
1781    GLbitfield OutputsWritten; /* Bitmask of which output regs are written to */
1782    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1783    void *TnlData;               /* should probably use Base.DriverData */
1784 };
1785
1786
1787 /** Fragment program object */
1788 struct fragment_program
1789 {
1790    struct program Base;   /**< base class */
1791    struct fp_instruction *Instructions;  /**< Compiled instructions */
1792    GLbitfield InputsRead;     /**< Bitmask of which input regs are read */
1793    GLbitfield OutputsWritten; /**< Bitmask of which output regs are written to */
1794    GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_INDEX bitmask */
1795    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1796    GLuint NumTexInstructions;
1797    GLuint NumTexIndirections;
1798    GLenum FogOption;
1799    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1800
1801 #ifdef USE_TCC
1802    char c_str[4096];            /* experimental... */
1803    int c_strlen;
1804 #endif
1805 };
1806
1807 struct ati_fragment_shader
1808 {
1809    struct program Base;
1810    struct atifs_instruction *Instructions[2];
1811    struct atifs_setupinst *SetupInst[2];
1812    GLfloat Constants[8][4];
1813    GLuint localConstDef;
1814    GLubyte numArithInstr[2];
1815    GLubyte regsAssigned[2];
1816    GLubyte NumPasses;
1817    GLubyte cur_pass;
1818    GLubyte last_optype;
1819    GLboolean interpinp1;
1820    GLboolean isValid;
1821    GLuint swizzlerq;
1822 };
1823
1824 /**
1825  * State common to vertex and fragment programs.
1826  */
1827 struct gl_program_state
1828 {
1829    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_NV */
1830    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_NV */
1831 };
1832
1833
1834 /**
1835  * State vars for GL_ARB/GL_NV_vertex_program
1836  */
1837 struct gl_vertex_program_state
1838 {
1839    GLboolean Enabled;                  /**< GL_VERTEX_PROGRAM_NV */
1840    GLboolean _Enabled;                 /**< Really enabled? */
1841    GLboolean PointSizeEnabled;         /**< GL_VERTEX_PROGRAM_POINT_SIZE_NV */
1842    GLboolean TwoSideEnabled;           /**< GL_VERTEX_PROGRAM_TWO_SIDE_NV */
1843    struct vertex_program *Current;     /**< ptr to currently bound program */
1844
1845    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1846    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1847
1848    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1849    /* Only used during program execution (may be moved someday): */
1850    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1851    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1852    GLuint InputsSize[MAX_NV_VERTEX_PROGRAM_INPUTS];
1853    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1854    GLint AddressReg[4];
1855
1856 #if FEATURE_MESA_program_debug
1857    GLprogramcallbackMESA Callback;
1858    GLvoid *CallbackData;
1859    GLboolean CallbackEnabled;
1860    GLuint CurrentPosition;
1861 #endif
1862 };
1863
1864
1865 /**
1866  * State for GL_ARB/NV_fragment_program
1867  */
1868 struct gl_fragment_program_state
1869 {
1870    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1871    GLboolean _Enabled;                   /* Really enabled? */
1872    GLboolean _Active;                    /* Really really enabled? */
1873    struct fragment_program *Current;     /* ptr to currently bound program */
1874    struct fragment_program *_Current;    /* ptr to currently active program */
1875    struct fp_machine Machine;            /* machine state */
1876    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1877
1878 #if FEATURE_MESA_program_debug
1879    GLprogramcallbackMESA Callback;
1880    GLvoid *CallbackData;
1881    GLboolean CallbackEnabled;
1882    GLuint CurrentPosition;
1883 #endif
1884 };
1885
1886
1887 /**
1888  * State for GL_ATI_fragment_shader
1889  */
1890 struct gl_ati_fragment_shader_state
1891 {
1892    GLboolean Enabled;
1893    GLboolean _Enabled;
1894    GLboolean Compiling;
1895    GLfloat globalConstants[8][4];
1896    struct atifs_machine Machine;            /* machine state */
1897    struct ati_fragment_shader *Current;
1898 };
1899
1900
1901 struct gl_query_object
1902 {
1903    GLuint Id;
1904    GLuint Result;      /* the counter */
1905    GLboolean Active;   /* inside Begin/EndQuery */
1906    GLboolean Ready;    /* result is ready */
1907 };
1908
1909
1910 struct gl_query_state
1911 {
1912    struct _mesa_HashTable *QueryObjects;
1913    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
1914    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
1915 };
1916
1917
1918 /**
1919  * gl2 unique interface identifier.
1920  * Each gl2 interface has its own interface id used for object queries.
1921  */
1922 enum gl2_uiid
1923 {
1924    UIID_UNKNOWN,                /* supported by all objects */
1925    UIID_GENERIC,                /* generic object */
1926    UIID_CONTAINER,              /* contains generic objects */
1927    UIID_SHADER,                 /* shader object */
1928    UIID_FRAGMENT_SHADER,        /* fragment shader */
1929    UIID_VERTEX_SHADER,          /* vertex shader */
1930    UIID_PROGRAM,                /* program object */
1931    UIID_3DLABS_SHHANDLE         /* encapsulates 3dlabs' ShHandle */
1932 };
1933
1934 struct gl2_unknown_intf
1935 {
1936    GLvoid (* AddRef) (struct gl2_unknown_intf **);
1937    GLvoid (* Release) (struct gl2_unknown_intf **);
1938    struct gl2_unknown_intf **(* QueryInterface) (struct gl2_unknown_intf **, enum gl2_uiid uiid);
1939 };
1940
1941 struct gl2_generic_intf
1942 {
1943    struct gl2_unknown_intf _unknown;
1944    GLvoid (* Delete) (struct gl2_generic_intf **);
1945    GLenum (* GetType) (struct gl2_generic_intf **);
1946    GLhandleARB (* GetName) (struct gl2_generic_intf **);
1947    GLboolean (* GetDeleteStatus) (struct gl2_generic_intf **);
1948    const GLcharARB *(* GetInfoLog) (struct gl2_generic_intf **);
1949 };
1950
1951 struct gl2_container_intf
1952 {
1953    struct gl2_generic_intf _generic;
1954    GLboolean (* Attach) (struct gl2_container_intf **, struct gl2_generic_intf **);
1955    GLboolean (* Detach) (struct gl2_container_intf **, struct gl2_generic_intf **);
1956    GLsizei (* GetAttachedCount) (struct gl2_container_intf **);
1957    struct gl2_generic_intf **(* GetAttached) (struct gl2_container_intf **, GLuint);
1958 };
1959
1960 struct gl2_shader_intf
1961 {
1962    struct gl2_generic_intf _generic;
1963    GLenum (* GetSubType) (struct gl2_shader_intf **);
1964    GLboolean (* GetCompileStatus) (struct gl2_shader_intf **);
1965    GLvoid (* SetSource) (struct gl2_shader_intf **, GLcharARB *, GLint *, GLsizei);
1966    const GLcharARB *(* GetSource) (struct gl2_shader_intf **);
1967    GLvoid (* Compile) (struct gl2_shader_intf **);
1968 };
1969
1970 struct gl2_program_intf
1971 {
1972    struct gl2_container_intf _container;
1973    GLboolean (* GetLinkStatus) (struct gl2_program_intf **);
1974    GLboolean (* GetValidateStatus) (struct gl2_program_intf **);
1975    GLvoid (* Link) (struct gl2_program_intf **);
1976    GLvoid (* Validate) (struct gl2_program_intf **);
1977 };
1978
1979 struct gl2_fragment_shader_intf
1980 {
1981    struct gl2_shader_intf _shader;
1982 };
1983
1984 struct gl2_vertex_shader_intf
1985 {
1986    struct gl2_shader_intf _shader;
1987 };
1988
1989 struct gl2_3dlabs_shhandle_intf
1990 {
1991    struct gl2_unknown_intf _unknown;
1992    GLvoid *(* GetShHandle) (struct gl2_3dlabs_shhandle_intf **);
1993 };
1994
1995 struct gl_shader_objects_state
1996 {
1997    struct gl2_program_intf **current_program;
1998 };
1999
2000
2001 /**
2002  * State which can be shared by multiple contexts:
2003  */
2004 struct gl_shared_state
2005 {
2006    _glthread_Mutex Mutex;                  /**< for thread safety */
2007    GLint RefCount;                         /**< Reference count */
2008    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2009    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2010
2011    /**
2012     * \name Default texture objects (shared by all multi-texture units)
2013     */
2014    /*@{*/
2015    struct gl_texture_object *Default1D;
2016    struct gl_texture_object *Default2D;
2017    struct gl_texture_object *Default3D;
2018    struct gl_texture_object *DefaultCubeMap;
2019    struct gl_texture_object *DefaultRect;
2020    /*@}*/
2021
2022    /**
2023     * \name Vertex/fragment programs
2024     */
2025    /*@{*/
2026    struct _mesa_HashTable *Programs;
2027 #if FEATURE_ARB_vertex_program
2028    struct program *DefaultVertexProgram;
2029 #endif
2030 #if FEATURE_ARB_fragment_program
2031    struct program *DefaultFragmentProgram;
2032 #endif
2033 #if FEATURE_ATI_fragment_shader
2034    struct program *DefaultFragmentShader;
2035 #endif
2036    /*@}*/
2037
2038 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2039    struct _mesa_HashTable *BufferObjects;
2040 #endif
2041
2042    struct _mesa_HashTable *GL2Objects;
2043
2044 #if FEATURE_EXT_framebuffer_object
2045    struct _mesa_HashTable *RenderBuffers;
2046    struct _mesa_HashTable *FrameBuffers;
2047 #endif
2048
2049    void *DriverData;  /**< Device driver shared state */
2050 };
2051
2052
2053
2054
2055 /**
2056  * A renderbuffer stores colors or depth values or stencil values.
2057  * A framebuffer object will have a collection of these.
2058  * Data are read/written to the buffer with a handful of Get/Put functions.
2059  *
2060  * Instances of this object are allocated with the Driver's NewRenderbuffer
2061  * hook.  Drivers will likely wrap this class inside a driver-specific
2062  * class to simulate inheritance.
2063  */
2064 struct gl_renderbuffer
2065 {
2066    GLuint Name;
2067    GLint RefCount;
2068    GLuint Width, Height;
2069    GLenum InternalFormat; /* The user-specified value */
2070    GLenum _BaseFormat;    /* Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or */
2071                           /* GL_STENCIL_INDEX. */
2072    GLenum DataType;       /* Type of values passed to the Get/Put functions */
2073    GLubyte ComponentSizes[4];  /* bits per component or channel */
2074    GLvoid *Data;
2075
2076    /* Delete this renderbuffer */
2077    void (*Delete)(struct gl_renderbuffer *rb);
2078
2079    /* Allocate new storage for this renderbuffer */
2080    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2081                              GLenum internalFormat,
2082                              GLuint width, GLuint height);
2083
2084    /* Lock/Unlock are called before/after calling the Get/Put functions.
2085     * Not sure this is the right place for these yet.
2086    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2087    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2088     */
2089
2090    /* Return a pointer to the element/pixel at (x,y).
2091     * Should return NULL if the buffer memory can't be directly addressed.
2092     */
2093    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2094                        GLint x, GLint y);
2095
2096    /* Get/Read a row of values.
2097     * The values will be of format _BaseFormat and type DataType.
2098     */
2099    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2100                   GLint x, GLint y, void *values);
2101
2102    /* Get/Read values at arbitrary locations.
2103     * The values will be of format _BaseFormat and type DataType.
2104     */
2105    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2106                      const GLint x[], const GLint y[], void *values);
2107
2108    /* Put/Write a row of values.
2109     * The values will be of format _BaseFormat and type DataType.
2110     */
2111    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2112                   GLint x, GLint y, const void *values, const GLubyte *mask);
2113
2114    /* Put/Write a row of RGB values.  This is a special-case routine that's
2115     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2116     * a common case for glDrawPixels and some triangle routines.
2117     * The values will be of format GL_RGB and type DataType.
2118     */
2119    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2120                     GLint x, GLint y, const void *values, const GLubyte *mask);
2121
2122
2123    /* Put/Write a row of identical values.
2124     * The values will be of format _BaseFormat and type DataType.
2125     */
2126    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2127                      GLint x, GLint y, const void *value, const GLubyte *mask);
2128
2129    /* Put/Write values at arbitrary locations.
2130     * The values will be of format _BaseFormat and type DataType.
2131     */
2132    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2133                      const GLint x[], const GLint y[], const void *values,
2134                      const GLubyte *mask);
2135    /* Put/Write identical values at arbitrary locations.
2136     * The values will be of format _BaseFormat and type DataType.
2137     */
2138    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2139                          GLuint count, const GLint x[], const GLint y[],
2140                          const void *value, const GLubyte *mask);
2141 };
2142
2143
2144 /**
2145  * A renderbuffer attachment point points to either a texture object
2146  * (and specifies a mipmap level, cube face or 3D texture slice) or
2147  * points to a renderbuffer.
2148  */
2149 struct gl_renderbuffer_attachment
2150 {
2151    GLenum Type;  /* GL_NONE or GL_TEXTURE or GL_RENDERBUFFER_EXT */
2152    GLboolean Complete;
2153
2154    /* IF Type == GL_RENDERBUFFER_EXT: */
2155    struct gl_renderbuffer *Renderbuffer;
2156
2157    /* IF Type == GL_TEXTURE: */
2158    struct gl_texture_object *Texture;
2159    GLuint TextureLevel;
2160    GLuint CubeMapFace;  /* 0 .. 5, for cube map textures */
2161    GLuint Zoffset;      /* for 3D textures */
2162 };
2163
2164
2165 /**
2166  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2167  * In C++ terms, think of this as a base class from which device drivers
2168  * will make derived classes.
2169  */
2170 struct gl_framebuffer
2171 {
2172    GLuint Name;      /* if zero, this is a window system framebuffer */
2173    GLint RefCount;
2174
2175    GLvisual Visual;             /**< The corresponding visual */
2176
2177    GLboolean Initialized;
2178
2179    GLuint Width, Height;        /**< size of frame buffer in pixels */
2180
2181    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2182    /*@{*/
2183    GLint _Xmin, _Xmax;  /**< inclusive */
2184    GLint _Ymin, _Ymax;  /**< exclusive */
2185    /*@}*/
2186
2187    /** \name  Derived Z buffer stuff */
2188    /*@{*/
2189    GLuint _DepthMax;    /**< Max depth buffer value */
2190    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2191    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2192    /*@}*/
2193
2194    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2195
2196    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2197    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2198
2199    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2200     * attribute group and GL_PIXEL attribute group, respectively.
2201     */
2202    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2203    GLenum ColorReadBuffer;
2204
2205    /* These are computed from ColorDrawBuffer and ColorReadBuffer */
2206    GLbitfield _ColorDrawBufferMask[MAX_DRAW_BUFFERS]; /* Mask of BUFFER_BIT_* flags */
2207    GLbitfield _ColorReadBufferMask; /* Zero or one of BUFFER_BIT_ flags */
2208
2209    /* These are computed from _Draw/ReadBufferMask, above. */
2210    GLuint _NumColorDrawBuffers[MAX_DRAW_BUFFERS];
2211    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS][4];
2212    struct gl_renderbuffer *_ColorReadBuffer;
2213
2214    /** Delete this framebuffer */
2215    void (*Delete)(struct gl_framebuffer *fb);
2216 };
2217
2218
2219 /**
2220  * Constants which may be overridden by device driver during context creation
2221  * but are never changed after that.
2222  */
2223 struct gl_constants
2224 {
2225    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2226    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2227    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2228    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2229    GLuint MaxTextureCoordUnits;
2230    GLuint MaxTextureImageUnits;
2231    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
2232    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2233    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2234    GLuint MaxArrayLockSize;
2235    GLint SubPixelBits;
2236    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2237    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2238    GLfloat PointSizeGranularity;
2239    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2240    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2241    GLfloat LineWidthGranularity;
2242    GLuint MaxColorTableSize;
2243    GLuint MaxConvolutionWidth;
2244    GLuint MaxConvolutionHeight;
2245    GLuint MaxClipPlanes;
2246    GLuint MaxLights;
2247    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2248    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2249    GLuint MaxViewportWidth, MaxViewportHeight;
2250    /* GL_ARB_vertex_program */
2251    GLuint MaxVertexProgramInstructions;
2252    GLuint MaxVertexProgramAttribs;
2253    GLuint MaxVertexProgramTemps;
2254    GLuint MaxVertexProgramLocalParams;
2255    GLuint MaxVertexProgramEnvParams;
2256    GLuint MaxVertexProgramAddressRegs;
2257    /* GL_ARB_fragment_program */
2258    GLuint MaxFragmentProgramInstructions;
2259    GLuint MaxFragmentProgramAttribs;
2260    GLuint MaxFragmentProgramTemps;
2261    GLuint MaxFragmentProgramLocalParams;
2262    GLuint MaxFragmentProgramEnvParams;
2263    GLuint MaxFragmentProgramAddressRegs;
2264    GLuint MaxFragmentProgramAluInstructions;
2265    GLuint MaxFragmentProgramTexInstructions;
2266    GLuint MaxFragmentProgramTexIndirections;
2267    /* vertex or fragment program */
2268    GLuint MaxProgramMatrices;
2269    GLuint MaxProgramMatrixStackDepth;
2270    /* vertex array / buffer object bounds checking */
2271    GLboolean CheckArrayBounds;
2272    /* GL_ARB_draw_buffers */
2273    GLuint MaxDrawBuffers;
2274    /* GL_OES_read_format */
2275    GLenum ColorReadFormat;
2276    GLenum ColorReadType;
2277    /* GL_EXT_framebuffer_object */
2278    GLuint MaxColorAttachments;
2279    GLuint MaxRenderbufferSize;
2280 };
2281
2282
2283 /**
2284  * Enable flag for each OpenGL extension.  Different device drivers will
2285  * enable different extensions at runtime.
2286  */
2287 struct gl_extensions
2288 {
2289    /**
2290     * \name Flags to quickly test if certain extensions are available.
2291     *
2292     * Not every extension needs to have such a flag, but it's encouraged.
2293     */
2294    /*@{*/
2295    GLboolean dummy;  /* don't remove this! */
2296    GLboolean ARB_depth_texture;
2297    GLboolean ARB_draw_buffers;
2298    GLboolean ARB_fragment_program;
2299    GLboolean ARB_fragment_shader;
2300    GLboolean ARB_half_float_pixel;
2301    GLboolean ARB_imaging;
2302    GLboolean ARB_multisample;
2303    GLboolean ARB_multitexture;
2304    GLboolean ARB_occlusion_query;
2305    GLboolean ARB_point_sprite;
2306    GLboolean ARB_shader_objects;
2307    GLboolean ARB_shading_language_100;
2308    GLboolean ARB_shadow;
2309    GLboolean ARB_texture_border_clamp;
2310    GLboolean ARB_texture_compression;
2311    GLboolean ARB_texture_cube_map;
2312    GLboolean ARB_texture_env_combine;
2313    GLboolean ARB_texture_env_crossbar;
2314    GLboolean ARB_texture_env_dot3;
2315    GLboolean ARB_texture_float;
2316    GLboolean ARB_texture_mirrored_repeat;
2317    GLboolean ARB_texture_non_power_of_two;
2318    GLboolean ARB_transpose_matrix;
2319    GLboolean ARB_vertex_buffer_object;
2320    GLboolean ARB_vertex_program;
2321    GLboolean ARB_vertex_shader;
2322    GLboolean ARB_window_pos;
2323    GLboolean EXT_abgr;
2324    GLboolean EXT_bgra;
2325    GLboolean EXT_blend_color;
2326    GLboolean EXT_blend_equation_separate;
2327    GLboolean EXT_blend_func_separate;
2328    GLboolean EXT_blend_logic_op;
2329    GLboolean EXT_blend_minmax;
2330    GLboolean EXT_blend_subtract;
2331    GLboolean EXT_clip_volume_hint;
2332    GLboolean EXT_cull_vertex;
2333    GLboolean EXT_convolution;
2334    GLboolean EXT_compiled_vertex_array;
2335    GLboolean EXT_copy_texture;
2336    GLboolean EXT_depth_bounds_test;
2337    GLboolean EXT_draw_range_elements;
2338    GLboolean EXT_framebuffer_object;
2339    GLboolean EXT_fog_coord;
2340    GLboolean EXT_histogram;
2341    GLboolean EXT_multi_draw_arrays;
2342    GLboolean EXT_paletted_texture;
2343    GLboolean EXT_packed_pixels;
2344    GLboolean EXT_pixel_buffer_object;
2345    GLboolean EXT_point_parameters;
2346    GLboolean EXT_polygon_offset;
2347    GLboolean EXT_rescale_normal;
2348    GLboolean EXT_shadow_funcs;
2349    GLboolean EXT_secondary_color;
2350    GLboolean EXT_separate_specular_color;
2351    GLboolean EXT_shared_texture_palette;
2352    GLboolean EXT_stencil_wrap;
2353    GLboolean EXT_stencil_two_side;
2354    GLboolean EXT_subtexture;
2355    GLboolean EXT_texture;
2356    GLboolean EXT_texture_object;
2357    GLboolean EXT_texture3D;
2358    GLboolean EXT_texture_compression_s3tc;
2359    GLboolean EXT_texture_env_add;
2360    GLboolean EXT_texture_env_combine;
2361    GLboolean EXT_texture_env_dot3;
2362    GLboolean EXT_texture_filter_anisotropic;
2363    GLboolean EXT_texture_lod_bias;
2364    GLboolean EXT_texture_mirror_clamp;
2365    GLboolean EXT_timer_query;
2366    GLboolean EXT_vertex_array;
2367    GLboolean EXT_vertex_array_set;
2368    /* vendor extensions */
2369    GLboolean APPLE_client_storage;
2370    GLboolean APPLE_packed_pixels;
2371    GLboolean ATI_texture_mirror_once;
2372    GLboolean ATI_texture_env_combine3;
2373    GLboolean ATI_fragment_shader;
2374    GLboolean IBM_rasterpos_clip;
2375    GLboolean IBM_multimode_draw_arrays;
2376    GLboolean MESA_pack_invert;
2377    GLboolean MESA_packed_depth_stencil;
2378    GLboolean MESA_program_debug;
2379    GLboolean MESA_resize_buffers;
2380    GLboolean MESA_ycbcr_texture;
2381    GLboolean NV_blend_square;
2382    GLboolean NV_fragment_program;
2383    GLboolean NV_light_max_exponent;
2384    GLboolean NV_point_sprite;
2385    GLboolean NV_texgen_reflection;
2386    GLboolean NV_texture_rectangle;
2387    GLboolean NV_vertex_program;
2388    GLboolean NV_vertex_program1_1;
2389    GLboolean OES_read_format;
2390    GLboolean SGI_color_matrix;
2391    GLboolean SGI_color_table;
2392    GLboolean SGI_texture_color_table;
2393    GLboolean SGIS_generate_mipmap;
2394    GLboolean SGIS_pixel_texture;
2395    GLboolean SGIS_texture_edge_clamp;
2396    GLboolean SGIS_texture_lod;
2397    GLboolean SGIX_depth_texture;
2398    GLboolean SGIX_pixel_texture;
2399    GLboolean SGIX_shadow;
2400    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2401    GLboolean TDFX_texture_compression_FXT1;
2402    GLboolean S3_s3tc;
2403    /*@}*/
2404    /* The extension string */
2405    const GLubyte *String;
2406 };
2407
2408
2409 /**
2410  * A stack of matrices (projection, modelview, color, texture, etc).
2411  */
2412 struct matrix_stack
2413 {
2414    GLmatrix *Top;      /**< points into Stack */
2415    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2416    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2417    GLuint MaxDepth;    /**< size of Stack[] array */
2418    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2419 };
2420
2421
2422 /**
2423  * \name Bits for image transfer operations
2424  *
2425  * \sa __GLcontextRec::ImageTransferState.
2426  */
2427 /*@{*/
2428 #define IMAGE_SCALE_BIAS_BIT                      0x1
2429 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2430 #define IMAGE_MAP_COLOR_BIT                       0x4
2431 #define IMAGE_COLOR_TABLE_BIT                     0x8
2432 #define IMAGE_CONVOLUTION_BIT                     0x10
2433 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2434 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2435 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2436 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2437 #define IMAGE_HISTOGRAM_BIT                       0x200
2438 #define IMAGE_MIN_MAX_BIT                         0x400
2439 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2440
2441
2442 /** Pixel Transfer ops up to convolution */
2443 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2444                                     IMAGE_SHIFT_OFFSET_BIT |   \
2445                                     IMAGE_MAP_COLOR_BIT |      \
2446                                     IMAGE_COLOR_TABLE_BIT)
2447
2448 /** Pixel transfer ops after convolution */
2449 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2450                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2451                                      IMAGE_COLOR_MATRIX_BIT |                 \
2452                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2453                                      IMAGE_HISTOGRAM_BIT |                    \
2454                                      IMAGE_MIN_MAX_BIT)
2455 /*@}*/
2456
2457
2458 /**
2459  * \name Bits to indicate what state has changed.
2460  *
2461  * 4 unused flags.
2462  */
2463 /*@{*/
2464 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2465 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2466 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2467 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2468 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2469 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2470 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2471 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2472 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2473 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2474 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2475 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2476 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2477 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2478 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2479 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2480 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2481 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2482 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2483 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2484 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2485 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2486 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2487 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2488 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2489 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2490 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2491 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2492 #define _NEW_ALL ~0
2493 /*@}*/
2494
2495
2496 /**
2497  * \name Bits to track array state changes
2498  *
2499  * Also used to summarize array enabled.
2500  */
2501 /*@{*/
2502 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2503 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2504 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2505 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2506 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2507 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2508 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
2509 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
2510 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2511 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2512 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2513 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2514 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2515 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2516 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2517 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2518 #define _NEW_ARRAY_ATTRIB_0         0x10000  /* start at bit 16 */
2519 #define _NEW_ARRAY_ALL              0xffffffff
2520
2521
2522 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2523 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2524 /*@}*/
2525
2526
2527 /**
2528  * \name A bunch of flags that we think might be useful to drivers.
2529  *
2530  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2531  */
2532 /*@{*/
2533 #define DD_FLATSHADE                0x1
2534 #define DD_SEPARATE_SPECULAR        0x2
2535 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2536 #define DD_TRI_LIGHT_TWOSIDE        0x8
2537 #define DD_TRI_UNFILLED             0x10
2538 #define DD_TRI_SMOOTH               0x20
2539 #define DD_TRI_STIPPLE              0x40
2540 #define DD_TRI_OFFSET               0x80
2541 #define DD_LINE_SMOOTH              0x100
2542 #define DD_LINE_STIPPLE             0x200
2543 #define DD_LINE_WIDTH               0x400
2544 #define DD_POINT_SMOOTH             0x800
2545 #define DD_POINT_SIZE               0x1000
2546 #define DD_POINT_ATTEN              0x2000
2547 #define DD_TRI_TWOSTENCIL           0x4000
2548 /*@}*/
2549
2550
2551 /**
2552  * \name Define the state changes under which each of these bits might change
2553  */
2554 /*@{*/
2555 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2556 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2557 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2558 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2559 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2560 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2561 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2562 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2563 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2564 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2565 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2566 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2567 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2568 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2569 /*@}*/
2570
2571
2572 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2573                                            _NEW_TEXTURE |       \
2574                                            _NEW_POINT |         \
2575                                            _NEW_MODELVIEW)
2576
2577 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2578                                            _NEW_TEXTURE)
2579
2580 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2581
2582
2583
2584
2585 /*
2586  * Forward declaration of display list data types:
2587  */
2588 union node;
2589 typedef union node Node;
2590
2591
2592 /* This has to be included here. */
2593 #include "dd.h"
2594
2595
2596 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2597
2598 /**
2599  * Core Mesa's support for tnl modules:
2600  */
2601 struct gl_tnl_module
2602 {
2603    /**
2604     * Vertex format to be lazily swapped into current dispatch.
2605     */
2606    const GLvertexformat *Current;
2607
2608    /**
2609     * \name Record of functions swapped out.
2610     * On restore, only need to swap these functions back in.
2611     */
2612    /*@{*/
2613    struct {
2614        _glapi_proc * location;
2615        _glapi_proc function;
2616    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2617    GLuint SwapCount;
2618    /*@}*/
2619 };
2620
2621 /* Strictly this is a tnl/ private concept, but it doesn't seem
2622  * worthwhile adding a tnl private structure just to hold this one bit
2623  * of information:
2624  */
2625 #define MESA_DLIST_DANGLING_REFS     0x1
2626
2627 /* Provide a location where information about a display list can be
2628  * collected.  Could be extended with driverPrivate structures,
2629  * etc. in the future.
2630  */
2631 struct mesa_display_list
2632 {
2633    Node *node;
2634    GLuint id;
2635    GLbitfield flags;
2636 };
2637
2638
2639 /**
2640  * State used during display list compilation and execution.
2641  */
2642 struct mesa_list_state
2643 {
2644    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2645    GLuint CallDepth;            /**< Current recursion calling depth */
2646
2647    struct mesa_display_list *CurrentList;
2648    Node *CurrentListPtr;        /**< Head of list being compiled */
2649    GLuint CurrentListNum;       /**< Number of the list being compiled */
2650    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2651    GLuint CurrentPos;           /**< Index into current block of nodes */
2652
2653    GLvertexformat ListVtxfmt;
2654
2655    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2656    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2657
2658    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2659    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2660
2661    GLubyte ActiveIndex;
2662    GLfloat CurrentIndex;
2663
2664    GLubyte ActiveEdgeFlag;
2665    GLboolean CurrentEdgeFlag;
2666 };
2667
2668
2669 /**
2670  * Mesa rendering context.
2671  *
2672  * This is the central context data structure for Mesa.  Almost all
2673  * OpenGL state is contained in this structure.
2674  * Think of this as a base class from which device drivers will derive
2675  * sub classes.
2676  *
2677  * The GLcontext typedef names this structure.
2678  */
2679 struct __GLcontextRec
2680 {
2681    /**
2682     * \name OS related interfaces.
2683     *
2684     * These \b must be the first members of this structure, because they are
2685     * exposed to the outside world (i.e. GLX extension).
2686     */
2687    /*@{*/
2688    __GLimports imports;
2689    __GLexports exports;
2690    /*@}*/
2691
2692    /** State possibly shared with other contexts in the address space */
2693    struct gl_shared_state *Shared;
2694
2695    /** \name API function pointer tables */
2696    /*@{*/
2697    struct _glapi_table *Save;   /**< Display list save functions */
2698    struct _glapi_table *Exec;   /**< Execute functions */
2699    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2700    /*@}*/
2701
2702    GLvisual Visual;
2703    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2704    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2705    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2706    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2707
2708    /**
2709     * Device driver function pointer table
2710     */
2711    struct dd_function_table Driver;
2712
2713    void *DriverCtx;     /**< Points to device driver context/state */
2714    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2715
2716    /** Core/Driver constants */
2717    struct gl_constants Const;
2718
2719    /** \name The various 4x4 matrix stacks */
2720    /*@{*/
2721    struct matrix_stack ModelviewMatrixStack;
2722    struct matrix_stack ProjectionMatrixStack;
2723    struct matrix_stack ColorMatrixStack;
2724    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2725    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2726    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2727    /*@}*/
2728
2729    /** Combined modelview and projection matrix */
2730    GLmatrix _ModelProjectMatrix;
2731
2732    /** \name Display lists */
2733    struct mesa_list_state ListState;
2734
2735    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2736    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2737
2738    /** Extensions */
2739    struct gl_extensions Extensions;
2740
2741    /** \name Renderer attribute stack */
2742    /*@{*/
2743    GLuint AttribStackDepth;
2744    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2745    /*@}*/
2746
2747    /** \name Renderer attribute groups
2748     *
2749     * We define a struct for each attribute group to make pushing and popping
2750     * attributes easy.  Also it's a good organization.
2751     */
2752    /*@{*/
2753    struct gl_accum_attrib       Accum;          /**< Accumulation buffer attributes */
2754    struct gl_colorbuffer_attrib Color;          /**< Color buffers attributes */
2755    struct gl_current_attrib     Current;        /**< Current attributes */
2756    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2757    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2758    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2759    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2760    struct gl_light_attrib       Light;          /**< Light attributes */
2761    struct gl_line_attrib        Line;           /**< Line attributes */
2762    struct gl_list_attrib        List;           /**< List attributes */
2763    struct gl_multisample_attrib Multisample;
2764    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2765    struct gl_point_attrib       Point;          /**< Point attributes */
2766    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2767    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2768    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2769    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2770    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2771    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2772    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2773    /*@}*/
2774
2775    /** \name Client attribute stack */
2776    /*@{*/
2777    GLuint ClientAttribStackDepth;
2778    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2779    /*@}*/
2780
2781    /** \name Client attribute groups */
2782    /*@{*/
2783    struct gl_array_attrib       Array;  /**< Vertex arrays */
2784    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2785    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2786    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2787    /*@}*/
2788
2789    /** \name Other assorted state (not pushed/popped on attribute stack) */
2790    /*@{*/
2791    struct gl_histogram_attrib   Histogram;
2792    struct gl_minmax_attrib      MinMax;
2793    struct gl_convolution_attrib Convolution1D;
2794    struct gl_convolution_attrib Convolution2D;
2795    struct gl_convolution_attrib Separable2D;
2796
2797    struct gl_evaluators EvalMap;   /**< All evaluators */
2798    struct gl_feedback   Feedback;  /**< Feedback */
2799    struct gl_selection  Select;    /**< Selection */
2800
2801    struct gl_color_table ColorTable;       /**< Pre-convolution */
2802    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2803    struct gl_color_table PostConvolutionColorTable;
2804    struct gl_color_table ProxyPostConvolutionColorTable;
2805    struct gl_color_table PostColorMatrixColorTable;
2806    struct gl_color_table ProxyPostColorMatrixColorTable;
2807
2808    struct gl_program_state Program;        /**< for vertex or fragment progs */
2809    struct gl_vertex_program_state VertexProgram;   /**< GL_NV_vertex_program */
2810    struct gl_fragment_program_state FragmentProgram;  /**< GL_NV_fragment_program */
2811    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
2812
2813    struct fragment_program *_TexEnvProgram;     /**< Texture state as fragment program */
2814    struct vertex_program *_TnlProgram;          /**< Fixed func TNL state as vertex program */
2815
2816    GLboolean _MaintainTexEnvProgram;
2817    GLboolean _MaintainTnlProgram;
2818
2819    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
2820
2821    struct gl_shader_objects_state ShaderObjects;        /* GL_ARB_shader_objects */
2822    /*@}*/
2823
2824 #if FEATURE_EXT_framebuffer_object
2825    /*struct gl_framebuffer *CurrentFramebuffer;*/
2826    struct gl_renderbuffer *CurrentRenderbuffer;
2827 #endif
2828
2829    GLenum ErrorValue;        /**< Last error code */
2830    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2831    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
2832
2833    /** \name Derived state */
2834    /*@{*/
2835    GLbitfield _TriangleCaps;      /**< bitwise-or of DD_* flags */
2836    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2837    GLfloat _EyeZDir[3];
2838    GLfloat _ModelViewInvScale;
2839    GLboolean _NeedEyeCoords;
2840    GLboolean _ForceEyeCoords;
2841    GLboolean _RotateMode;
2842    GLenum _CurrentProgram;    /* currently executing program */
2843
2844    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2845    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2846    /**@}*/
2847
2848    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2849
2850
2851    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2852                     *
2853                     * We don't have a better way to communicate this value from
2854                     * swrast_setup to swrast. */
2855
2856    /** \name Color clamping (tentative part of GL_ARB_color_clamp_control) */
2857    /*@{*/
2858    GLboolean ClampFragmentColors;
2859    GLboolean ClampVertexColors;
2860    /*@}*/
2861
2862    /** \name For debugging/development only */
2863    /*@{*/
2864    GLboolean FirstTimeCurrent;
2865    /*@}*/
2866
2867    /** Dither disable via MESA_NO_DITHER env var */
2868    GLboolean NoDither;
2869
2870    /** software compression/decompression supported or not */
2871    GLboolean Mesa_DXTn;
2872
2873    /** Core tnl module support */
2874    struct gl_tnl_module TnlModule;
2875
2876    /**
2877     * \name Hooks for module contexts.
2878     *
2879     * These will eventually live in the driver or elsewhere.
2880     */
2881    /*@{*/
2882    void *swrast_context;
2883    void *swsetup_context;
2884    void *swtnl_context;
2885    void *swtnl_im;
2886    void *acache_context;
2887    void *aelt_context;
2888    /*@}*/
2889 };
2890
2891
2892 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2893 extern const char *_mesa_prim_name[GL_POLYGON+4];
2894
2895
2896 #ifdef MESA_DEBUG
2897 extern int MESA_VERBOSE;
2898 extern int MESA_DEBUG_FLAGS;
2899 # define MESA_FUNCTION __FUNCTION__
2900 #else
2901 # define MESA_VERBOSE 0
2902 # define MESA_DEBUG_FLAGS 0
2903 # define MESA_FUNCTION "a function"
2904 # ifndef NDEBUG
2905 #  define NDEBUG
2906 # endif
2907 #endif
2908
2909
2910 enum _verbose
2911 {
2912    VERBOSE_VARRAY               = 0x0001,
2913    VERBOSE_TEXTURE              = 0x0002,
2914    VERBOSE_IMMEDIATE            = 0x0004,
2915    VERBOSE_PIPELINE             = 0x0008,
2916    VERBOSE_DRIVER               = 0x0010,
2917    VERBOSE_STATE                = 0x0020,
2918    VERBOSE_API                  = 0x0040,
2919    VERBOSE_DISPLAY_LIST         = 0x0100,
2920    VERBOSE_LIGHTING             = 0x0200,
2921    VERBOSE_PRIMS                = 0x0400,
2922    VERBOSE_VERTS                = 0x0800,
2923    VERBOSE_DISASSEM             = 0x1000
2924 };
2925
2926
2927 enum _debug
2928 {
2929    DEBUG_ALWAYS_FLUSH           = 0x1
2930 };
2931
2932
2933
2934 #define Elements(x) sizeof(x)/sizeof(*(x))
2935
2936
2937 #endif /* TYPES_H */