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:  6.1
  11  *
  12  * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the "Software"),
  16  * to deal in the Software without restriction, including without limitation
  17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  18  * and/or sell copies of the Software, and to permit persons to whom the
  19  * Software is furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice shall be included
  22  * in all copies or substantial portions of the Software.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  25  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  27  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  28  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30  */
  31
  32
  33
  34 #ifndef TYPES_H
  35 #define TYPES_H
  36
  37
  38 #include "glheader.h"
  39 #include "config.h"             /* Hardwired parameters */
  40 #include "glapitable.h"
  41 #include "glthread.h"
  42 #include "math/m_matrix.h"      /* GLmatrix */
  43
  44
  45 /**
  46  * Color channel data type.
  47  */
  48 #if CHAN_BITS == 8
  49    typedef GLubyte GLchan;
  50 #define CHAN_MAX 255
  51 #define CHAN_MAXF 255.0F
  52 #define CHAN_TYPE GL_UNSIGNED_BYTE
  53 #elif CHAN_BITS == 16
  54    typedef GLushort GLchan;
  55 #define CHAN_MAX 65535
  56 #define CHAN_MAXF 65535.0F
  57 #define CHAN_TYPE GL_UNSIGNED_SHORT
  58 #elif CHAN_BITS == 32
  59    typedef GLfloat GLchan;
  60 #define CHAN_MAX 1.0
  61 #define CHAN_MAXF 1.0F
  62 #define CHAN_TYPE GL_FLOAT
  63 #else
  64 #error "illegal number of color channel bits"
  65 #endif
  66
  67
  68 /**
  69  * Accumulation buffer data type.
  70  */
  71 #if ACCUM_BITS==8
  72    typedef GLbyte GLaccum;
  73 #elif ACCUM_BITS==16
  74    typedef GLshort GLaccum;
  75 #elif ACCUM_BITS==32
  76    typedef GLfloat GLaccum;
  77 #else
  78 #  error "illegal number of accumulation bits"
  79 #endif
  80
  81
  82 /**
  83  * Stencil buffer data type.
  84  */
  85 #if STENCIL_BITS==8
  86    typedef GLubyte GLstencil;
  87 #  define STENCIL_MAX 0xff
  88 #elif STENCIL_BITS==16
  89    typedef GLushort GLstencil;
  90 #  define STENCIL_MAX 0xffff
  91 #else
  92 #  error "illegal number of stencil bits"
  93 #endif
  94
  95
  96 /**
  97  * Depth buffer data type.
  98  *
  99  * \note Must be 32-bits!
 100  */
 101 typedef GLuint GLdepth;
 102
 103
 104 /**
 105  * Fixed point data type.
 106  */
 107 typedef int GLfixed;
 108 /*
 109  * Fixed point arithmetic macros
 110  */
 111 #define FIXED_FRAC_BITS 11
 112
 113 #define FIXED_SHIFT     FIXED_FRAC_BITS
 114 #define FIXED_ONE       (1 << FIXED_SHIFT)
 115 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
 116 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
 117 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
 118 #define FIXED_EPSILON   1
 119 #define FIXED_SCALE     ((float) FIXED_ONE)
 120 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 121 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 122 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 123 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 124 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 125 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 126 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 127 #define PosFloatToFixed(X)      FloatToFixed(X)
 128 #define SignedFloatToFixed(X)   FloatToFixed(X)
 129
 130
 131
 132 /**
 133  * \name Some forward type declarations
 134  */
 135 /*@{*/
 136 struct _mesa_HashTable;
 137 struct gl_texture_image;
 138 struct gl_texture_object;
 139 typedef struct __GLcontextRec GLcontext;
 140 typedef struct __GLcontextModesRec GLvisual;
 141 typedef struct gl_frame_buffer GLframebuffer;
 142 /*@}*/
 143
 144
 145
 146 /**
 147  * These define the aliases between numbered vertex attributes and
 148  * conventional OpenGL vertex attributes.  We use these values in
 149  * quite a few places.
 150  *
 151  * New in Mesa 4.1.
 152  */
 153 enum {
 154         VERT_ATTRIB_POS = 0,
 155         VERT_ATTRIB_WEIGHT = 1,
 156         VERT_ATTRIB_NORMAL = 2,
 157         VERT_ATTRIB_COLOR0 = 3,
 158         VERT_ATTRIB_COLOR1 = 4,
 159         VERT_ATTRIB_FOG = 5,
 160         VERT_ATTRIB_SIX = 6,
 161         VERT_ATTRIB_SEVEN = 7,
 162         VERT_ATTRIB_TEX0 = 8,
 163         VERT_ATTRIB_TEX1 = 9,
 164         VERT_ATTRIB_TEX2 = 10,
 165         VERT_ATTRIB_TEX3 = 11,
 166         VERT_ATTRIB_TEX4 = 12,
 167         VERT_ATTRIB_TEX5 = 13,
 168         VERT_ATTRIB_TEX6 = 14,
 169         VERT_ATTRIB_TEX7 = 15,
 170         VERT_ATTRIB_MAX = 16
 171 } ;
 172
 173 /* These are used in bitfields in many places */
 174 #define VERT_BIT_POS     (1 << VERT_ATTRIB_POS)
 175 #define VERT_BIT_WEIGHT  (1 << VERT_ATTRIB_WEIGHT)
 176 #define VERT_BIT_NORMAL  (1 << VERT_ATTRIB_NORMAL)
 177 #define VERT_BIT_COLOR0  (1 << VERT_ATTRIB_COLOR0)
 178 #define VERT_BIT_COLOR1  (1 << VERT_ATTRIB_COLOR1)
 179 #define VERT_BIT_FOG     (1 << VERT_ATTRIB_FOG)
 180 #define VERT_BIT_SIX     (1 << VERT_ATTRIB_SIX)
 181 #define VERT_BIT_SEVEN   (1 << VERT_ATTRIB_SEVEN)
 182 #define VERT_BIT_TEX0    (1 << VERT_ATTRIB_TEX0)
 183 #define VERT_BIT_TEX1    (1 << VERT_ATTRIB_TEX1)
 184 #define VERT_BIT_TEX2    (1 << VERT_ATTRIB_TEX2)
 185 #define VERT_BIT_TEX3    (1 << VERT_ATTRIB_TEX3)
 186 #define VERT_BIT_TEX4    (1 << VERT_ATTRIB_TEX4)
 187 #define VERT_BIT_TEX5    (1 << VERT_ATTRIB_TEX5)
 188 #define VERT_BIT_TEX6    (1 << VERT_ATTRIB_TEX6)
 189 #define VERT_BIT_TEX7    (1 << VERT_ATTRIB_TEX7)
 190
 191 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 192
 193
 194 /* Fragment programs use a different but related set of attributes:
 195  */
 196
 197 /* Fragment input registers / attributes */
 198 #define FRAG_ATTRIB_WPOS  0
 199 #define FRAG_ATTRIB_COL0  1
 200 #define FRAG_ATTRIB_COL1  2
 201 #define FRAG_ATTRIB_FOGC  3
 202 #define FRAG_ATTRIB_TEX0  4
 203 #define FRAG_ATTRIB_TEX1  5
 204 #define FRAG_ATTRIB_TEX2  6
 205 #define FRAG_ATTRIB_TEX3  7
 206 #define FRAG_ATTRIB_TEX4  8
 207 #define FRAG_ATTRIB_TEX5  9
 208 #define FRAG_ATTRIB_TEX6  10
 209 #define FRAG_ATTRIB_TEX7  11
 210
 211 /* Bitmasks for the above */
 212 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 213 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 214 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 215 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 216 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 217 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 218 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 219 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 220 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 221 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 222 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 223 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 224
 225 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 226                            FRAG_BIT_TEX1|       \
 227                            FRAG_BIT_TEX2|       \
 228                            FRAG_BIT_TEX3|       \
 229                            FRAG_BIT_TEX4|       \
 230                            FRAG_BIT_TEX5|       \
 231                            FRAG_BIT_TEX6|       \
 232                            FRAG_BIT_TEX7)
 233
 234
 235
 236 /**
 237  * Maximum number of temporary vertices required for clipping.
 238  *
 239  * Used in array_cache and tnl modules.
 240  */
 241 #define MAX_CLIPPED_VERTICES ((2 * (6 + MAX_CLIP_PLANES))+1)
 242
 243
 244 /**
 245  * Data structure for color tables
 246  */
 247 struct gl_color_table {
 248    GLenum Format;         /**< GL_ALPHA, GL_RGB, GL_RGB, etc */
 249    GLenum IntFormat;
 250    GLuint Size;           /**< number of entries (rows) in table */
 251    GLvoid *Table;         /**< either GLfloat * or GLchan * */
 252    GLboolean FloatTable;  /**< are entries stored as floats? */
 253    GLubyte RedSize;
 254    GLubyte GreenSize;
 255    GLubyte BlueSize;
 256    GLubyte AlphaSize;
 257    GLubyte LuminanceSize;
 258    GLubyte IntensitySize;
 259 };
 260
 261
 262 /**
 263  * \name Bit flags used for updating material values.
 264  */
 265 /*@{*/
 266 #define MAT_ATTRIB_FRONT_AMBIENT           0
 267 #define MAT_ATTRIB_BACK_AMBIENT            1
 268 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 269 #define MAT_ATTRIB_BACK_DIFFUSE            3
 270 #define MAT_ATTRIB_FRONT_SPECULAR          4
 271 #define MAT_ATTRIB_BACK_SPECULAR           5
 272 #define MAT_ATTRIB_FRONT_EMISSION          6
 273 #define MAT_ATTRIB_BACK_EMISSION           7
 274 #define MAT_ATTRIB_FRONT_SHININESS         8
 275 #define MAT_ATTRIB_BACK_SHININESS          9
 276 #define MAT_ATTRIB_FRONT_INDEXES           10
 277 #define MAT_ATTRIB_BACK_INDEXES            11
 278 #define MAT_ATTRIB_MAX                     12
 279
 280 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 281 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 282 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 283 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 284 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 285 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 286
 287 #define MAT_INDEX_AMBIENT  0
 288 #define MAT_INDEX_DIFFUSE  1
 289 #define MAT_INDEX_SPECULAR 2
 290
 291 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 292 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 293 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 294 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 295 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 296 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 297 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 298 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 299 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 300 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 301 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 302 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 303
 304
 305 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 306                                  MAT_BIT_FRONT_AMBIENT |        \
 307                                  MAT_BIT_FRONT_DIFFUSE |        \
 308                                  MAT_BIT_FRONT_SPECULAR |       \
 309                                  MAT_BIT_FRONT_SHININESS |      \
 310                                  MAT_BIT_FRONT_INDEXES)
 311
 312 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 313                                  MAT_BIT_BACK_AMBIENT |         \
 314                                  MAT_BIT_BACK_DIFFUSE |         \
 315                                  MAT_BIT_BACK_SPECULAR |        \
 316                                  MAT_BIT_BACK_SHININESS |       \
 317                                  MAT_BIT_BACK_INDEXES)
 318
 319 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 320 /*@}*/
 321
 322
 323 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 324 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 325
 326 /**
 327  * Material shininess lookup table.
 328  */
 329 struct gl_shine_tab {
 330    struct gl_shine_tab *next, *prev;
 331    GLfloat tab[SHINE_TABLE_SIZE+1];
 332    GLfloat shininess;
 333    GLuint refcount;
 334 };
 335
 336
 337 /**
 338  * Light.
 339  */
 340 struct gl_light {
 341    struct gl_light *next;       /**< double linked list with sentinel */
 342    struct gl_light *prev;
 343
 344    GLfloat Ambient[4];          /**< ambient color */
 345    GLfloat Diffuse[4];          /**< diffuse color */
 346    GLfloat Specular[4];         /**< specular color */
 347    GLfloat EyePosition[4];      /**< position in eye coordinates */
 348    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 349    GLfloat SpotExponent;
 350    GLfloat SpotCutoff;          /**< in degrees */
 351    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 352    GLfloat ConstantAttenuation;
 353    GLfloat LinearAttenuation;
 354    GLfloat QuadraticAttenuation;
 355    GLboolean Enabled;           /**< On/off flag */
 356
 357    /**
 358     * \name Derived fields
 359     */
 360    /*@{*/
 361    GLuint _Flags;               /**< State */
 362
 363    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 364    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 365    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 366    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 367    GLfloat _VP_inf_spot_attenuation;
 368
 369    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 370    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 371    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 372    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 373    GLfloat _dli;                /**< CI diffuse light intensity */
 374    GLfloat _sli;                /**< CI specular light intensity */
 375    /*@}*/
 376 };
 377
 378
 379 /**
 380  * Light model.
 381  */
 382 struct gl_lightmodel {
 383    GLfloat Ambient[4];          /**< ambient color */
 384    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 385    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 386    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 387                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 388 };
 389
 390
 391 /**
 392  * Material.
 393  */
 394 struct gl_material
 395 {
 396    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 397 };
 398
 399
 400 /**
 401  * Accumulation buffer attributes.
 402  */
 403 struct gl_accum_attrib {
 404    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 405 };
 406
 407
 408 /**
 409  * \name Clipping planes bits
 410  *
 411  * Used in gl_colorbuffer_attrib::_DrawDestMask and
 412  * gl_colorbuffer_attrib::_ReadSrcMask below to identify color buffers.
 413  */
 414 /*@{*/
 415 #define FRONT_LEFT_BIT  0x1
 416 #define FRONT_RIGHT_BIT 0x2
 417 #define BACK_LEFT_BIT   0x4
 418 #define BACK_RIGHT_BIT  0x8
 419 #define AUX0_BIT        0x10
 420 #define AUX1_BIT        0x20
 421 #define AUX2_BIT        0x40
 422 #define AUX3_BIT        0x80
 423 /*@}*/
 424
 425
 426 /**
 427  * Color buffers attributes.
 428  */
 429 struct gl_colorbuffer_attrib {
 430    GLuint ClearIndex;                   /**< Index to use for glClear */
 431    GLclampf ClearColor[4];              /**< Color to use for glClear */
 432
 433    GLuint IndexMask;                    /**< Color index write mask */
 434    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 435
 436    GLenum DrawBuffer;                   /**< Which buffer to draw into */
 437    GLubyte _DrawDestMask;               /**< bitwise-OR of FRONT/BACK_LEFT/RIGHT_BITs */
 438
 439    /**
 440     * \name alpha testing
 441     */
 442    /*@{*/
 443    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 444    GLenum AlphaFunc;                    /**< Alpha test function */
 445    GLclampf AlphaRef;                   /**< Alpha reference value */
 446    /*@}*/
 447
 448    /**
 449     * \name Blending
 450     */
 451    /*@{*/
 452    GLboolean BlendEnabled;              /**< Blending enabled flag */
 453    GLenum BlendSrcRGB;                  /**< Blending source operator */
 454    GLenum BlendDstRGB;                  /**< Blending destination operator */
 455    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 456    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 457    GLenum BlendEquationRGB;             /**< Blending equation */
 458    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 459    GLfloat BlendColor[4];               /**< Blending color */
 460    /*@}*/
 461
 462    /**
 463     * \name Logic op
 464     */
 465    /*@{*/
 466    GLenum LogicOp;                      /**< Logic operator */
 467    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 468    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 469    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 470    /*@}*/
 471
 472    GLboolean DitherFlag;                /**< Dither enable flag */
 473 };
 474
 475
 476 /**
 477  * Current attributes.
 478  */
 479 struct gl_current_attrib {
 480    /**
 481     * \name Values valid only when FLUSH_VERTICES has been called.
 482     */
 483    /*@{*/
 484    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 485                                                   *  indexed by VERT_ATTRIB_* */
 486    GLfloat Index;                               /**< Current color index */
 487    GLboolean EdgeFlag;                          /**< Current edge flag */
 488    /*@}*/
 489
 490    /**
 491     * \name Values are always valid.
 492     *
 493     * \note BTW, note how similar this set of attributes is to the SWvertex
 494     * data type in the software rasterizer...
 495     */
 496    /*@{*/
 497    GLfloat RasterPos[4];                        /**< Current raster position */
 498    GLfloat RasterDistance;                      /**< Current raster distance */
 499    GLfloat RasterColor[4];                      /**< Current raster color */
 500    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 501    GLfloat RasterIndex;                         /**< Current raster index */
 502    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 503    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 504    /*@}*/
 505 };
 506
 507
 508 /**
 509  * Depth buffer attributes.
 510  */
 511 struct gl_depthbuffer_attrib {
 512    GLenum Func;                 /**< Function for depth buffer compare */
 513    GLclampd Clear;              /**< Value to clear depth buffer to */
 514    GLboolean Test;              /**< Depth buffering enabled flag */
 515    GLboolean Mask;              /**< Depth buffer writable? */
 516    GLboolean OcclusionTest;     /**< GL_HP_occlusion_test */
 517    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 518    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 519 };
 520
 521
 522 /**
 523  * glEnable()/glDisable() attributes.
 524  */
 525 struct gl_enable_attrib {
 526    GLboolean AlphaTest;
 527    GLboolean AutoNormal;
 528    GLboolean Blend;
 529    GLuint ClipPlanes;
 530    GLboolean ColorMaterial;
 531    GLboolean ColorTable;                /* SGI_color_table */
 532    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 533    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 534    GLboolean Convolution1D;
 535    GLboolean Convolution2D;
 536    GLboolean Separable2D;
 537    GLboolean CullFace;
 538    GLboolean DepthTest;
 539    GLboolean Dither;
 540    GLboolean Fog;
 541    GLboolean Histogram;
 542    GLboolean Light[MAX_LIGHTS];
 543    GLboolean Lighting;
 544    GLboolean LineSmooth;
 545    GLboolean LineStipple;
 546    GLboolean IndexLogicOp;
 547    GLboolean ColorLogicOp;
 548    GLboolean Map1Color4;
 549    GLboolean Map1Index;
 550    GLboolean Map1Normal;
 551    GLboolean Map1TextureCoord1;
 552    GLboolean Map1TextureCoord2;
 553    GLboolean Map1TextureCoord3;
 554    GLboolean Map1TextureCoord4;
 555    GLboolean Map1Vertex3;
 556    GLboolean Map1Vertex4;
 557    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 558    GLboolean Map2Color4;
 559    GLboolean Map2Index;
 560    GLboolean Map2Normal;
 561    GLboolean Map2TextureCoord1;
 562    GLboolean Map2TextureCoord2;
 563    GLboolean Map2TextureCoord3;
 564    GLboolean Map2TextureCoord4;
 565    GLboolean Map2Vertex3;
 566    GLboolean Map2Vertex4;
 567    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 568    GLboolean MinMax;
 569    GLboolean Normalize;
 570    GLboolean PixelTexture;
 571    GLboolean PointSmooth;
 572    GLboolean PolygonOffsetPoint;
 573    GLboolean PolygonOffsetLine;
 574    GLboolean PolygonOffsetFill;
 575    GLboolean PolygonSmooth;
 576    GLboolean PolygonStipple;
 577    GLboolean RescaleNormals;
 578    GLboolean Scissor;
 579    GLboolean Stencil;
 580    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 581    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 582    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 583    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 584    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 585    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 586    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 587    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 588    /* SGI_texture_color_table */
 589    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 590    /* GL_NV_vertex_program */
 591    GLboolean VertexProgram;
 592    GLboolean VertexProgramPointSize;
 593    GLboolean VertexProgramTwoSide;
 594    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 595    GLboolean PointSprite;
 596 };
 597
 598
 599 /**
 600  * Eval attributes.
 601  */
 602 struct gl_eval_attrib {
 603    /**
 604     * \name Enable bits
 605     */
 606    /*@{*/
 607    GLboolean Map1Color4;
 608    GLboolean Map1Index;
 609    GLboolean Map1Normal;
 610    GLboolean Map1TextureCoord1;
 611    GLboolean Map1TextureCoord2;
 612    GLboolean Map1TextureCoord3;
 613    GLboolean Map1TextureCoord4;
 614    GLboolean Map1Vertex3;
 615    GLboolean Map1Vertex4;
 616    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 617    GLboolean Map2Color4;
 618    GLboolean Map2Index;
 619    GLboolean Map2Normal;
 620    GLboolean Map2TextureCoord1;
 621    GLboolean Map2TextureCoord2;
 622    GLboolean Map2TextureCoord3;
 623    GLboolean Map2TextureCoord4;
 624    GLboolean Map2Vertex3;
 625    GLboolean Map2Vertex4;
 626    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 627    GLboolean AutoNormal;
 628    /*@}*/
 629
 630    /**
 631     * \name Map Grid endpoints and divisions and calculated du values
 632     */
 633    /*@{*/
 634    GLint MapGrid1un;
 635    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 636    GLint MapGrid2un, MapGrid2vn;
 637    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 638    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 639    /*@}*/
 640 };
 641
 642
 643 /**
 644  * Fog attributes.
 645  */
 646 struct gl_fog_attrib {
 647    GLboolean Enabled;           /**< Fog enabled flag */
 648    GLfloat Color[4];            /**< Fog color */
 649    GLfloat Density;             /**< Density >= 0.0 */
 650    GLfloat Start;               /**< Start distance in eye coords */
 651    GLfloat End;                 /**< End distance in eye coords */
 652    GLfloat Index;               /**< Fog index */
 653    GLenum Mode;                 /**< Fog mode */
 654    GLboolean ColorSumEnabled;
 655    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 656 };
 657
 658
 659 /**
 660  * Hint attributes.
 661  *
 662  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 663  */
 664 struct gl_hint_attrib {
 665    GLenum PerspectiveCorrection;
 666    GLenum PointSmooth;
 667    GLenum LineSmooth;
 668    GLenum PolygonSmooth;
 669    GLenum Fog;
 670    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 671    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 672    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 673 };
 674
 675
 676 /**
 677  * Histogram attributes.
 678  */
 679 struct gl_histogram_attrib {
 680    GLuint Width;                                /**< number of table entries */
 681    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 682    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 683    GLboolean Sink;                              /**< terminate image transfer? */
 684    GLubyte RedSize;                             /**< Bits per counter */
 685    GLubyte GreenSize;
 686    GLubyte BlueSize;
 687    GLubyte AlphaSize;
 688    GLubyte LuminanceSize;
 689 };
 690
 691
 692 struct gl_minmax_attrib {
 693    GLenum Format;
 694    GLboolean Sink;
 695    GLfloat Min[4], Max[4];   /**< RGBA */
 696 };
 697
 698
 699 struct gl_convolution_attrib {
 700    GLenum Format;
 701    GLenum InternalFormat;
 702    GLuint Width;
 703    GLuint Height;
 704    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 705 };
 706
 707
 708 #define LIGHT_SPOT         0x1
 709 #define LIGHT_LOCAL_VIEWER 0x2
 710 #define LIGHT_POSITIONAL   0x4
 711 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 712
 713 /**
 714  * Lighting attributes.
 715  */
 716 struct gl_light_attrib {
 717    struct gl_light Light[MAX_LIGHTS];   /**< Array of lights */
 718    struct gl_lightmodel Model;          /**< Lighting model */
 719
 720    /**
 721     * Must flush FLUSH_VERTICES before referencing:
 722     */
 723    /*@{*/
 724    struct gl_material Material;         /**< Includes front & back values */
 725    /*@}*/
 726
 727    GLboolean Enabled;                   /**< Lighting enabled flag */
 728    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 729    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 730    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 731    GLuint ColorMaterialBitmask;         /**< bitmask formed from Face and Mode */
 732    GLboolean ColorMaterialEnabled;
 733
 734    struct gl_light EnabledList;         /**< List sentinel */
 735
 736    /**
 737     * Derived for optimizations:
 738     */
 739    /*@{*/
 740    GLboolean _NeedEyeCoords;
 741    GLboolean _NeedVertices;             /**< Use fast shader? */
 742    GLuint  _Flags;                      /**< LIGHT_* flags, see above */
 743    GLfloat _BaseColor[2][3];
 744    /*@}*/
 745 };
 746
 747
 748 /**
 749  * Line attributes.
 750  */
 751 struct gl_line_attrib {
 752    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 753    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 754    GLushort StipplePattern;     /**< Stipple pattern */
 755    GLint StippleFactor;         /**< Stipple repeat factor */
 756    GLfloat Width;               /**< Line width */
 757    GLfloat _Width;              /**< Clamped Line width */
 758 };
 759
 760
 761 struct gl_list_attrib {
 762    GLuint ListBase;
 763 };
 764
 765
 766 struct gl_list_opcode {
 767    GLuint size;
 768    void (*execute)( GLcontext *ctx, void *data );
 769    void (*destroy)( GLcontext *ctx, void *data );
 770    void (*print)( GLcontext *ctx, void *data );
 771 };
 772
 773 #define GL_MAX_EXT_OPCODES 16
 774
 775 struct gl_list_extensions {
 776    struct gl_list_opcode opcode[GL_MAX_EXT_OPCODES];
 777    GLuint nr_opcodes;
 778 };
 779
 780
 781 struct gl_multisample_attrib {
 782    GLboolean Enabled;
 783    GLboolean SampleAlphaToCoverage;
 784    GLboolean SampleAlphaToOne;
 785    GLboolean SampleCoverage;
 786    GLfloat SampleCoverageValue;
 787    GLboolean SampleCoverageInvert;
 788 };
 789
 790
 791 /**
 792  * Pixel attributes.
 793  */
 794 struct gl_pixel_attrib {
 795    GLenum ReadBuffer;           /**< source buffer for glReadPixels()/glCopyPixels() */
 796    GLubyte _ReadSrcMask;        /**< Not really a mask, but like _DrawDestMask
 797                                   *
 798                                   * May be: FRONT_LEFT_BIT, BACK_LEFT_BIT,
 799                                   * FRONT_RIGHT_BIT or BACK_RIGHT_BIT. */
 800    GLfloat RedBias, RedScale;
 801    GLfloat GreenBias, GreenScale;
 802    GLfloat BlueBias, BlueScale;
 803    GLfloat AlphaBias, AlphaScale;
 804    GLfloat DepthBias, DepthScale;
 805    GLint IndexShift, IndexOffset;
 806    GLboolean MapColorFlag;
 807    GLboolean MapStencilFlag;
 808    GLfloat ZoomX, ZoomY;
 809    /* XXX move these out of gl_pixel_attrib */
 810    GLint MapStoSsize;           /**< Size of each pixel map */
 811    GLint MapItoIsize;
 812    GLint MapItoRsize;
 813    GLint MapItoGsize;
 814    GLint MapItoBsize;
 815    GLint MapItoAsize;
 816    GLint MapRtoRsize;
 817    GLint MapGtoGsize;
 818    GLint MapBtoBsize;
 819    GLint MapAtoAsize;
 820    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 821    GLint MapItoI[MAX_PIXEL_MAP_TABLE];
 822    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 823    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 824    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 825    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 826    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 827    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 828    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 829    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 830    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 831    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 832    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 833    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 834    /** GL_EXT_histogram */
 835    GLboolean HistogramEnabled;
 836    GLboolean MinMaxEnabled;
 837    /** GL_SGIS_pixel_texture */
 838    GLboolean PixelTextureEnabled;
 839    GLenum FragmentRgbSource;
 840    GLenum FragmentAlphaSource;
 841    /** GL_SGI_color_matrix */
 842    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 843    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 844    /** GL_SGI_color_table */
 845    GLfloat ColorTableScale[4];
 846    GLfloat ColorTableBias[4];
 847    GLboolean ColorTableEnabled;
 848    GLfloat PCCTscale[4];
 849    GLfloat PCCTbias[4];
 850    GLboolean PostConvolutionColorTableEnabled;
 851    GLfloat PCMCTscale[4];
 852    GLfloat PCMCTbias[4];
 853    GLboolean PostColorMatrixColorTableEnabled;
 854    /** GL_SGI_texture_color_table */
 855    GLfloat TextureColorTableScale[4];
 856    GLfloat TextureColorTableBias[4];
 857    /** Convolution */
 858    GLboolean Convolution1DEnabled;
 859    GLboolean Convolution2DEnabled;
 860    GLboolean Separable2DEnabled;
 861    GLfloat ConvolutionBorderColor[3][4];
 862    GLenum ConvolutionBorderMode[3];
 863    GLfloat ConvolutionFilterScale[3][4];
 864    GLfloat ConvolutionFilterBias[3][4];
 865    GLfloat PostConvolutionScale[4];  /**< RGBA */
 866    GLfloat PostConvolutionBias[4];   /**< RGBA */
 867 };
 868
 869
 870 /**
 871  * Point attributes.
 872  */
 873 struct gl_point_attrib {
 874    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 875    GLfloat Size;                /**< User-specified point size */
 876    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
 877    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 878    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 879    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 880    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 881    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
 882    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV_point_sprite / GL_NV_point_sprite */
 883    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 884 };
 885
 886
 887 /**
 888  * Polygon attributes.
 889  */
 890 struct gl_polygon_attrib {
 891    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
 892    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
 893    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
 894    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
 895    GLboolean CullFlag;          /**< Culling on/off flag */
 896    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
 897    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
 898    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
 899    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
 900    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
 901    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
 902    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
 903    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
 904 };
 905
 906
 907 /**
 908  * Scissor attributes.
 909  */
 910 struct gl_scissor_attrib {
 911    GLboolean Enabled;           /**< Scissor test enabled? */
 912    GLint X, Y;                  /**< Lower left corner of box */
 913    GLsizei Width, Height;       /**< Size of box */
 914 };
 915
 916
 917 /**
 918  * Stencil attributes.
 919  */
 920 struct gl_stencil_attrib {
 921    GLboolean Enabled;           /**< Enabled flag */
 922    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
 923    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
 924    GLenum Function[2];          /**< Stencil function */
 925    GLenum FailFunc[2];          /**< Fail function */
 926    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
 927    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
 928    GLstencil Ref[2];            /**< Reference value */
 929    GLstencil ValueMask[2];      /**< Value mask */
 930    GLstencil WriteMask[2];      /**< Write mask */
 931    GLstencil Clear;             /**< Clear value */
 932 };
 933
 934
 935 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
 936
 937 #define TEXTURE_1D_INDEX    0
 938 #define TEXTURE_2D_INDEX    1
 939 #define TEXTURE_3D_INDEX    2
 940 #define TEXTURE_CUBE_INDEX  3
 941 #define TEXTURE_RECT_INDEX  4
 942
 943 /* Texture.Unit[]._ReallyEnabled flags: */
 944 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
 945 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
 946 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
 947 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
 948 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
 949
 950
 951 /* TexGenEnabled flags */
 952 #define S_BIT 1
 953 #define T_BIT 2
 954 #define R_BIT 4
 955 #define Q_BIT 8
 956
 957 /* Bitmap versions of the GL_ constants. */
 958 #define TEXGEN_SPHERE_MAP        0x1
 959 #define TEXGEN_OBJ_LINEAR        0x2
 960 #define TEXGEN_EYE_LINEAR        0x4
 961 #define TEXGEN_REFLECTION_MAP_NV 0x8
 962 #define TEXGEN_NORMAL_MAP_NV     0x10
 963
 964 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
 965                                   TEXGEN_REFLECTION_MAP_NV | \
 966                                   TEXGEN_NORMAL_MAP_NV)
 967 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
 968                                   TEXGEN_REFLECTION_MAP_NV | \
 969                                   TEXGEN_NORMAL_MAP_NV     | \
 970                                   TEXGEN_EYE_LINEAR)
 971
 972 /* A selection of state flags to make driver and module's lives easier. */
 973 #define ENABLE_TEXGEN0        0x1
 974 #define ENABLE_TEXGEN1        0x2
 975 #define ENABLE_TEXGEN2        0x4
 976 #define ENABLE_TEXGEN3        0x8
 977 #define ENABLE_TEXGEN4        0x10
 978 #define ENABLE_TEXGEN5        0x20
 979 #define ENABLE_TEXGEN6        0x40
 980 #define ENABLE_TEXGEN7        0x80
 981
 982 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
 983 #define ENABLE_TEXMAT1        0x2
 984 #define ENABLE_TEXMAT2        0x4
 985 #define ENABLE_TEXMAT3        0x8
 986 #define ENABLE_TEXMAT4        0x10
 987 #define ENABLE_TEXMAT5        0x20
 988 #define ENABLE_TEXMAT6        0x40
 989 #define ENABLE_TEXMAT7        0x80
 990
 991 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
 992 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
 993
 994
 995 /**
 996  * Texel fetch function prototype.  We use texel fetch functions to
 997  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
 998  * texture images.  These functions help to isolate us from the gritty
 999  * details of all the various texture image encodings.
1000  *
1001  * \param texImage texture image.
1002  * \param col texel column.
1003  * \param row texel row.
1004  * \param img texel image level/layer.
1005  * \param texelOut output texel (up to 4 GLchans)
1006  */
1007 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1008                                  GLint col, GLint row, GLint img,
1009                                  GLchan *texelOut );
1010
1011 /**
1012  * As above, but returns floats.
1013  * Used for depth component images and for upcoming signed/float
1014  * texture images.
1015  */
1016 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1017                                  GLint col, GLint row, GLint img,
1018                                  GLfloat *texelOut );
1019
1020 /**
1021  * Texture format record
1022  */
1023 struct gl_texture_format {
1024    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1025
1026    GLenum BaseFormat;           /**< Either GL_ALPHA, GL_INTENSITY, GL_LUMINANCE,
1027                                  *   GL_LUMINANCE_ALPHA, GL_RGB, GL_RGBA,
1028                                  *   GL_COLOR_INDEX or GL_DEPTH_COMPONENT.
1029                                  */
1030    GLubyte RedBits;             /**< Bits per texel component */
1031    GLubyte GreenBits;           /**< These are just rough approximations for */
1032    GLubyte BlueBits;            /**< compressed texture formats. */
1033    GLubyte AlphaBits;
1034    GLubyte LuminanceBits;
1035    GLubyte IntensityBits;
1036    GLubyte IndexBits;
1037    GLubyte DepthBits;
1038
1039    GLint TexelBytes;            /**< Bytes per texel (0 for compressed formats */
1040
1041    /**
1042     * \name Texel fetch function pointers
1043     */
1044    /*@{*/
1045    FetchTexelFuncC FetchTexel1D;
1046    FetchTexelFuncC FetchTexel2D;
1047    FetchTexelFuncC FetchTexel3D;
1048    FetchTexelFuncF FetchTexel1Df;
1049    FetchTexelFuncF FetchTexel2Df;
1050    FetchTexelFuncF FetchTexel3Df;
1051    /*@}*/
1052 };
1053
1054
1055 /**
1056  * Texture image record
1057  */
1058 struct gl_texture_image {
1059    GLenum Format;               /**< GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1060                                  *    GL_INTENSITY, GL_RGB, GL_RGBA,
1061                                  *    GL_COLOR_INDEX or GL_DEPTH_COMPONENT only.
1062                                  *    Used for choosing TexEnv arithmetic.
1063                                  */
1064    GLint IntFormat;             /**< Internal format as given by the user */
1065    GLuint Border;               /**< 0 or 1 */
1066    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1067    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1068    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1069    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1070    GLuint Width2;               /**< = Width - 2*Border */
1071    GLuint Height2;              /**< = Height - 2*Border */
1072    GLuint Depth2;               /**< = Depth - 2*Border */
1073    GLuint WidthLog2;            /**< = log2(Width2) */
1074    GLuint HeightLog2;           /**< = log2(Height2) */
1075    GLuint DepthLog2;            /**< = log2(Depth2) */
1076    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1077    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1078    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1079    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1080    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1081    GLboolean IsClientData;      /**< Data owned by client? */
1082    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1083
1084    const struct gl_texture_format *TexFormat;
1085
1086    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1087    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1088
1089    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1090    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1091
1092    /**
1093     * \name For device driver:
1094     */
1095    /*@{*/
1096    void *DriverData;            /**< Arbitrary device driver data */
1097    /*@}*/
1098 };
1099
1100 #define FACE_POS_X   0
1101 #define FACE_NEG_X   1
1102 #define FACE_POS_Y   2
1103 #define FACE_NEG_Y   3
1104 #define FACE_POS_Z   4
1105 #define FACE_NEG_Z   5
1106 #define MAX_FACES  6
1107
1108 /**
1109  * Texture object record
1110  */
1111 struct gl_texture_object {
1112    _glthread_Mutex Mutex;       /**< for thread safety */
1113    GLint RefCount;              /**< reference count */
1114    GLuint Name;                 /**< an unsigned integer */
1115    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1116    GLfloat Priority;            /**< in [0,1] */
1117    GLfloat BorderColor[4];      /**< unclamped */
1118    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1119    /** \name Wrap modes
1120     * Are GL_CLAMP, REPEAT, GL_CLAMP_TO_EDGE, and GL_CLAMP_TO_BORDER_ARB. */
1121    /*@{*/
1122    GLenum WrapS;
1123    GLenum WrapT;
1124    GLenum WrapR;
1125    /*@}*/
1126    GLenum MinFilter;            /**< minification filter */
1127    GLenum MagFilter;            /**< magnification filter */
1128    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1129    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1130    GLfloat LodBias;             /**< OpenGL 1.4 */
1131    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1132    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1133    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1134    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1135    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1136    GLfloat ShadowAmbient;
1137    GLenum CompareMode;          /**< GL_ARB_shadow */
1138    GLenum CompareFunc;          /**< GL_ARB_shadow */
1139    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1140    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1141    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1142    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1143    GLboolean _IsPowerOfTwo;     /**< Are all image dimensions powers of two? */
1144
1145    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1146
1147    /** GL_EXT_paletted_texture */
1148    struct gl_color_table Palette;
1149
1150    GLboolean Complete;                  /**< Is texture object complete? */
1151    struct gl_texture_object *Next;      /**< Next in linked list */
1152
1153    /**
1154     * \name For device driver
1155     */
1156    /*@{*/
1157    void *DriverData;    /**< Arbitrary device driver data */
1158    /*@}*/
1159 };
1160
1161 /**
1162  * Texture combine environment state.
1163  *
1164  * \todo
1165  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1166  * structure will need to be expanded for 4 elements.
1167  */
1168 struct gl_tex_env_combine_state {
1169    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1170    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1171    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1172    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1173    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1174    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1175    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1176    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1177    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1178    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1179 };
1180
1181 /**
1182  * Texture unit record
1183  */
1184 struct gl_texture_unit {
1185    GLuint Enabled;              /**< bitmask of TEXTURE_*_BIT flags */
1186    GLuint _ReallyEnabled;       /**< 0 or exactly one of TEXTURE_*_BIT flags */
1187
1188    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1189    GLfloat EnvColor[4];
1190    GLuint TexGenEnabled;        /**< Bitwise-OR of [STRQ]_BIT values */
1191    /** \name Tex coord generation mode
1192     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1193    /*@{*/
1194    GLenum GenModeS;
1195    GLenum GenModeT;
1196    GLenum GenModeR;
1197    GLenum GenModeQ;
1198    /*@}*/
1199    GLuint _GenBitS;
1200    GLuint _GenBitT;
1201    GLuint _GenBitR;
1202    GLuint _GenBitQ;
1203    GLuint _GenFlags;            /**< bitwise or of GenBit[STRQ] */
1204    GLfloat ObjectPlaneS[4];
1205    GLfloat ObjectPlaneT[4];
1206    GLfloat ObjectPlaneR[4];
1207    GLfloat ObjectPlaneQ[4];
1208    GLfloat EyePlaneS[4];
1209    GLfloat EyePlaneT[4];
1210    GLfloat EyePlaneR[4];
1211    GLfloat EyePlaneQ[4];
1212    GLfloat LodBias;             /**< for biasing mipmap levels */
1213
1214    /**
1215     * \name GL_EXT_texture_env_combine
1216     */
1217    struct gl_tex_env_combine_state Combine;
1218
1219    /**
1220     * Derived state based on \c EnvMode and the \c BaseFormat of the
1221     * currently enabled texture.
1222     */
1223    struct gl_tex_env_combine_state _EnvMode;
1224
1225    /**
1226     * Currently enabled combiner state.  This will point to either
1227     * \c Combine or \c _EnvMode.
1228     */
1229    struct gl_tex_env_combine_state *_CurrentCombine;
1230
1231    struct gl_texture_object *Current1D;
1232    struct gl_texture_object *Current2D;
1233    struct gl_texture_object *Current3D;
1234    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1235    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1236
1237    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1238
1239    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1240    struct gl_texture_object Saved2D;
1241    struct gl_texture_object Saved3D;
1242    struct gl_texture_object SavedCubeMap;
1243    struct gl_texture_object SavedRect;
1244
1245    /* GL_SGI_texture_color_table */
1246    struct gl_color_table ColorTable;
1247    struct gl_color_table ProxyColorTable;
1248    GLboolean ColorTableEnabled;
1249 };
1250
1251
1252 /**
1253  * Texture attributes
1254  */
1255 struct gl_texture_attrib {
1256    /**
1257     * name multitexture
1258     */
1259    /**@{*/
1260    GLuint CurrentUnit;          /**< Active texture unit */
1261    GLuint _EnabledUnits;        /**< one bit set for each really-enabled unit */
1262    GLuint _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1263    GLuint _GenFlags;            /**< for texgen */
1264    GLuint _TexGenEnabled;
1265    GLuint _TexMatEnabled;
1266    /**@}*/
1267
1268    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1269
1270    struct gl_texture_object *Proxy1D;
1271    struct gl_texture_object *Proxy2D;
1272    struct gl_texture_object *Proxy3D;
1273    struct gl_texture_object *ProxyCubeMap;
1274    struct gl_texture_object *ProxyRect;
1275
1276    /** GL_EXT_shared_texture_palette */
1277    GLboolean SharedPalette;
1278    struct gl_color_table Palette;
1279 };
1280
1281
1282 /**
1283  * Transformation attributes.
1284  */
1285 struct gl_transform_attrib {
1286    GLenum MatrixMode;                           /**< Matrix mode */
1287    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1288    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1289    GLuint ClipPlanesEnabled;                    /**< on/off bitmask */
1290    GLboolean Normalize;                         /**< Normalize all normals? */
1291    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1292    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1293 };
1294
1295
1296 /**
1297  * Viewport attributes.
1298  */
1299 struct gl_viewport_attrib {
1300    GLint X, Y;                  /**< position */
1301    GLsizei Width, Height;       /**< size */
1302    GLfloat Near, Far;           /**< Depth buffer range */
1303    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1304 };
1305
1306
1307 /**
1308  * Node for the attribute stack
1309  */
1310 struct gl_attrib_node {
1311    GLbitfield kind;
1312    void *data;
1313    struct gl_attrib_node *next;
1314 };
1315
1316
1317 /**
1318  * GL_ARB_vertex_buffer_object buffer object
1319  */
1320 struct gl_buffer_object {
1321    GLint RefCount;
1322    GLuint Name;
1323    GLenum Usage;
1324    GLenum Access;
1325    GLvoid *Pointer;   /**< Only valid while buffer is mapped */
1326    GLuint Size;       /**< Size of data array in bytes */
1327    GLubyte *Data;     /**< The storage */
1328 };
1329
1330
1331
1332 /**
1333  * Client pixel packing/unpacking attributes
1334  */
1335 struct gl_pixelstore_attrib {
1336    GLint Alignment;
1337    GLint RowLength;
1338    GLint SkipPixels;
1339    GLint SkipRows;
1340    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1341    GLint SkipImages;      /**< for GL_EXT_texture3D */
1342    GLboolean SwapBytes;
1343    GLboolean LsbFirst;
1344    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1345    GLboolean Invert;        /**< GL_MESA_pack_invert */
1346 };
1347
1348
1349 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1350
1351
1352 /**
1353  * Client vertex array attributes
1354  */
1355 struct gl_client_array {
1356    GLint Size;
1357    GLenum Type;
1358    GLsizei Stride;              /**< user-specified stride */
1359    GLsizei StrideB;             /**< actual stride in bytes */
1360    const GLubyte *Ptr;
1361    GLuint Enabled;              /**< one of the _NEW_ARRAY_ bits */
1362    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1363
1364    /**< GL_ARB_vertex_buffer_object */
1365    struct gl_buffer_object *BufferObj;
1366    GLuint _MaxElement;
1367
1368    GLuint Flags;
1369 };
1370
1371
1372 /**
1373  * Array attributes.
1374  */
1375 struct gl_array_attrib {
1376    struct gl_client_array Vertex;            /**< client data descriptors */
1377    struct gl_client_array Normal;
1378    struct gl_client_array Color;
1379    struct gl_client_array SecondaryColor;
1380    struct gl_client_array FogCoord;
1381    struct gl_client_array Index;
1382    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1383    struct gl_client_array EdgeFlag;
1384
1385    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1386
1387    GLint ActiveTexture;         /**< Client Active Texture */
1388    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1389    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1390
1391    GLuint _Enabled;             /**< _NEW_ARRAY_* - bit set if array enabled */
1392    GLuint NewState;             /**< _NEW_ARRAY_* */
1393
1394 #if FEATURE_ARB_vertex_buffer_object
1395    struct gl_buffer_object *NullBufferObj;
1396    struct gl_buffer_object *ArrayBufferObj;
1397    struct gl_buffer_object *ElementArrayBufferObj;
1398 #endif
1399    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1400 };
1401
1402
1403 struct gl_feedback {
1404    GLenum Type;
1405    GLuint _Mask;                /* FB_* bits */
1406    GLfloat *Buffer;
1407    GLuint BufferSize;
1408    GLuint Count;
1409 };
1410
1411
1412 /**
1413  * Selection attributes.
1414  */
1415 struct gl_selection {
1416    GLuint *Buffer;      /**< selection buffer */
1417    GLuint BufferSize;   /**< size of the selection buffer */
1418    GLuint BufferCount;  /**< number of values in the selection buffer */
1419    GLuint Hits;         /**< number of records in the selection buffer */
1420    GLuint NameStackDepth; /**< name stack depth */
1421    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1422    GLboolean HitFlag;   /**< hit flag */
1423    GLfloat HitMinZ;     /**< minimum hit depth */
1424    GLfloat HitMaxZ;     /**< maximum hit depth */
1425 };
1426
1427
1428 /**
1429  * 1-D Evaluator control points
1430  */
1431 struct gl_1d_map
1432 {
1433    GLuint Order;        /**< Number of control points */
1434    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1435    GLfloat *Points;     /**< Points to contiguous control points */
1436 };
1437
1438
1439 /**
1440  * 2-D Evaluator control points
1441  */
1442 struct gl_2d_map
1443 {
1444    GLuint Uorder;               /**< Number of control points in U dimension */
1445    GLuint Vorder;               /**< Number of control points in V dimension */
1446    GLfloat u1, u2, du;
1447    GLfloat v1, v2, dv;
1448    GLfloat *Points;             /**< Points to contiguous control points */
1449 };
1450
1451
1452 /**
1453  * All evaluator control points
1454  */
1455 struct gl_evaluators
1456 {
1457    /**
1458     * \name 1-D maps
1459     */
1460    /*@{*/
1461    struct gl_1d_map Map1Vertex3;
1462    struct gl_1d_map Map1Vertex4;
1463    struct gl_1d_map Map1Index;
1464    struct gl_1d_map Map1Color4;
1465    struct gl_1d_map Map1Normal;
1466    struct gl_1d_map Map1Texture1;
1467    struct gl_1d_map Map1Texture2;
1468    struct gl_1d_map Map1Texture3;
1469    struct gl_1d_map Map1Texture4;
1470    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1471    /*@}*/
1472
1473    /**
1474     * \name 2-D maps
1475     */
1476    /*@{*/
1477    struct gl_2d_map Map2Vertex3;
1478    struct gl_2d_map Map2Vertex4;
1479    struct gl_2d_map Map2Index;
1480    struct gl_2d_map Map2Color4;
1481    struct gl_2d_map Map2Normal;
1482    struct gl_2d_map Map2Texture1;
1483    struct gl_2d_map Map2Texture2;
1484    struct gl_2d_map Map2Texture3;
1485    struct gl_2d_map Map2Texture4;
1486    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1487    /*@}*/
1488 };
1489
1490
1491 /**
1492  * NV_fragment_program runtime state
1493  */
1494 struct fp_machine
1495 {
1496    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1497    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1498    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1499    GLuint CondCodes[4];
1500 };
1501
1502
1503 /**
1504  * Names of the various vertex/fragment register files
1505  */
1506 enum register_file
1507 {
1508    PROGRAM_TEMPORARY = 10,
1509    PROGRAM_INPUT,
1510    PROGRAM_OUTPUT,
1511    PROGRAM_LOCAL_PARAM,
1512    PROGRAM_ENV_PARAM,
1513    PROGRAM_NAMED_PARAM,
1514    PROGRAM_STATE_VAR,
1515    PROGRAM_WRITE_ONLY,
1516         PROGRAM_ADDRESS
1517 };
1518
1519
1520 /* Vertex and fragment instructions */
1521 struct vp_instruction;
1522 struct fp_instruction;
1523
1524 struct program_parameter_list;
1525
1526
1527 /**
1528  * Base class for any kind of program object
1529  */
1530 struct program
1531 {
1532    GLuint Id;
1533    GLubyte *String;    /* Null-terminated program text */
1534    GLenum Target;
1535    GLenum Format;      /* String encoding format */
1536    GLint RefCount;
1537    GLboolean Resident;
1538    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1539    GLuint NumInstructions;  /* GL_ARB_vertex/fragment_program */
1540    GLuint NumTemporaries;
1541    GLuint NumParameters;
1542    GLuint NumAttributes;
1543    GLuint NumAddressRegs;
1544 };
1545
1546
1547 /** Vertex program object */
1548 struct vertex_program
1549 {
1550    struct program Base;   /* base class */
1551    struct vp_instruction *Instructions;  /* Compiled instructions */
1552    GLboolean IsPositionInvariant;  /* GL_NV_vertex_program1_1 */
1553    GLuint InputsRead;     /* Bitmask of which input regs are read */
1554    GLuint OutputsWritten; /* Bitmask of which output regs are written to */
1555    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1556 };
1557
1558
1559 /** Fragment program object */
1560 struct fragment_program
1561 {
1562    struct program Base;   /**< base class */
1563    struct fp_instruction *Instructions;  /**< Compiled instructions */
1564    GLuint InputsRead;     /**< Bitmask of which input regs are read */
1565    GLuint OutputsWritten; /**< Bitmask of which output regs are written to */
1566    GLuint TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_INDEX bitmask */
1567    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1568    GLuint NumTexInstructions;
1569    GLuint NumTexIndirections;
1570    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1571 };
1572
1573
1574 /**
1575  * State common to vertex and fragment programs.
1576  */
1577 struct program_state {
1578    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_NV */
1579    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_NV */
1580 };
1581
1582
1583 /**
1584  * State vars for GL_NV_vertex_program
1585  */
1586 struct vertex_program_state
1587 {
1588    GLboolean Enabled;                    /**< GL_VERTEX_PROGRAM_NV */
1589    GLboolean PointSizeEnabled;           /**< GL_VERTEX_PROGRAM_POINT_SIZE_NV */
1590    GLboolean TwoSideEnabled;             /**< GL_VERTEX_PROGRAM_TWO_SIDE_NV */
1591    struct vertex_program *Current;       /**< ptr to currently bound program */
1592
1593    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1594    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1595
1596    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1597    /* Only used during program execution (may be moved someday): */
1598    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1599    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1600    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1601    GLint AddressReg[4];
1602
1603 #if FEATURE_MESA_program_debug
1604    GLprogramcallbackMESA Callback;
1605    GLvoid *CallbackData;
1606    GLboolean CallbackEnabled;
1607    GLuint CurrentPosition;
1608 #endif
1609 };
1610
1611
1612 /*
1613  * State for GL_ARB/NV_fragment_program
1614  */
1615 struct fragment_program_state
1616 {
1617    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1618    struct fragment_program *Current;     /* ptr to currently bound program */
1619    struct fp_machine Machine;            /* machine state */
1620    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1621
1622 #if FEATURE_MESA_program_debug
1623    GLprogramcallbackMESA Callback;
1624    GLvoid *CallbackData;
1625    GLboolean CallbackEnabled;
1626    GLuint CurrentPosition;
1627 #endif
1628 };
1629
1630
1631 /*
1632  * State for GL_ARB_occlusion_query
1633  */
1634 struct occlusion_state
1635 {
1636    GLboolean Active;
1637    GLuint CurrentQueryObject;
1638    GLuint PassedCounter;
1639    struct _mesa_HashTable *QueryObjects;
1640 };
1641
1642
1643 /**
1644  * State which can be shared by multiple contexts:
1645  */
1646 struct gl_shared_state
1647 {
1648    _glthread_Mutex Mutex;                  /**< for thread safety */
1649    GLint RefCount;                         /**< Reference count */
1650    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
1651    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
1652    struct gl_texture_object *TexObjectList;/**< Linked list of texture objects */
1653
1654    /**
1655     * \name Default texture objects (shared by all multi-texture units)
1656     */
1657    /*@{*/
1658    struct gl_texture_object *Default1D;
1659    struct gl_texture_object *Default2D;
1660    struct gl_texture_object *Default3D;
1661    struct gl_texture_object *DefaultCubeMap;
1662    struct gl_texture_object *DefaultRect;
1663    /*@}*/
1664
1665    /**
1666     * \name GL_NV_vertex/_program
1667     */
1668    /*@{*/
1669    struct _mesa_HashTable *Programs;
1670 #if FEATURE_ARB_vertex_program
1671    struct program *DefaultVertexProgram;
1672 #endif
1673 #if FEATURE_ARB_fragment_program
1674    struct program *DefaultFragmentProgram;
1675 #endif
1676    /*@}*/
1677
1678 #if FEATURE_ARB_vertex_buffer_object
1679    struct _mesa_HashTable *BufferObjects;
1680 #endif
1681
1682    void *DriverData;  /**< Device driver shared state */
1683 };
1684
1685
1686 /**
1687  * Frame buffer.
1688  *
1689  * A "frame buffer" is a color buffer and its optional ancillary buffers:
1690  * depth, accum, stencil, and software-simulated alpha buffers.
1691  * In C++ terms, think of this as a base class from which device drivers
1692  * will make derived classes.
1693  */
1694 struct gl_frame_buffer
1695 {
1696    GLvisual Visual;             /**< The corresponding visual */
1697
1698    GLuint Width, Height;        /**< size of frame buffer in pixels */
1699
1700    GLboolean UseSoftwareDepthBuffer;
1701    GLboolean UseSoftwareAccumBuffer;
1702    GLboolean UseSoftwareStencilBuffer;
1703    GLboolean UseSoftwareAlphaBuffers;
1704
1705    /** \name Software depth (aka Z) buffer */
1706    /*@{*/
1707    GLvoid *DepthBuffer;         /**< array [Width*Height] of GLushort or GLuint*/
1708    /*@}*/
1709
1710    /** \name Software stencil buffer */
1711    /*@{*/
1712    GLstencil *Stencil;          /**< array [Width*Height] of GLstencil values */
1713    /*@}*/
1714
1715    /** \name Software accumulation buffer */
1716    /*@{*/
1717    GLaccum *Accum;              /**< array [4*Width*Height] of GLaccum values */
1718    /*@}*/
1719
1720    /** \name Software alpha planes */
1721    /*@{*/
1722    GLchan *FrontLeftAlpha;      /**< array [Width*Height] of GLchan */
1723    GLchan *BackLeftAlpha;       /**< array [Width*Height] of GLchan */
1724    GLchan *FrontRightAlpha;     /**< array [Width*Height] of GLchan */
1725    GLchan *BackRightAlpha;      /**< array [Width*Height] of GLchan */
1726    /*@}*/
1727
1728    /**
1729     * \name Drawing bounds
1730     *
1731     * Intersection of window size and scissor box
1732     */
1733    /*@{*/
1734    GLint _Xmin;  /**< inclusive */
1735    GLint _Ymin;  /**< inclusive */
1736    GLint _Xmax;  /**< exclusive */
1737    GLint _Ymax;  /**< exclusive */
1738    /*@}*/
1739 };
1740
1741
1742 /**
1743  * Constants which may be overridden by device driver during context creation
1744  * but are never changed after that.
1745  */
1746 struct gl_constants
1747 {
1748    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
1749    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
1750    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
1751    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
1752    GLuint MaxTextureCoordUnits;
1753    GLuint MaxTextureImageUnits;
1754    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
1755    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
1756    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
1757    GLuint MaxArrayLockSize;
1758    GLint SubPixelBits;
1759    GLfloat MinPointSize, MaxPointSize;          /* aliased */
1760    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
1761    GLfloat PointSizeGranularity;
1762    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
1763    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
1764    GLfloat LineWidthGranularity;
1765    GLuint NumAuxBuffers;
1766    GLuint MaxColorTableSize;
1767    GLuint MaxConvolutionWidth;
1768    GLuint MaxConvolutionHeight;
1769    GLuint MaxClipPlanes;
1770    GLuint MaxLights;
1771    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
1772    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
1773    /* GL_ARB_vertex_program */
1774    GLuint MaxVertexProgramInstructions;
1775    GLuint MaxVertexProgramAttribs;
1776    GLuint MaxVertexProgramTemps;
1777    GLuint MaxVertexProgramLocalParams;
1778    GLuint MaxVertexProgramEnvParams;
1779    GLuint MaxVertexProgramAddressRegs;
1780    /* GL_ARB_fragment_program */
1781    GLuint MaxFragmentProgramInstructions;
1782    GLuint MaxFragmentProgramAttribs;
1783    GLuint MaxFragmentProgramTemps;
1784    GLuint MaxFragmentProgramLocalParams;
1785    GLuint MaxFragmentProgramEnvParams;
1786    GLuint MaxFragmentProgramAddressRegs;
1787    GLuint MaxFragmentProgramAluInstructions;
1788    GLuint MaxFragmentProgramTexInstructions;
1789    GLuint MaxFragmentProgramTexIndirections;
1790    /* vertex or fragment program */
1791    GLuint MaxProgramMatrices;
1792    GLuint MaxProgramMatrixStackDepth;
1793    /* vertex array / buffer object bounds checking */
1794    GLboolean CheckArrayBounds;
1795 };
1796
1797
1798 /**
1799  * List of extensions.
1800  */
1801 struct gl_extensions
1802 {
1803    /**
1804     * \name Flags to quickly test if certain extensions are available.
1805     *
1806     * Not every extension needs to have such a flag, but it's encouraged.
1807     */
1808    /*@{*/
1809    GLboolean dummy;  /* don't remove this! */
1810    GLboolean ARB_depth_texture;
1811    GLboolean ARB_fragment_program;
1812    GLboolean ARB_imaging;
1813    GLboolean ARB_multisample;
1814    GLboolean ARB_multitexture;
1815    GLboolean ARB_occlusion_query;
1816    GLboolean ARB_point_sprite;
1817    GLboolean ARB_shadow;
1818    GLboolean ARB_texture_border_clamp;
1819    GLboolean ARB_texture_compression;
1820    GLboolean ARB_texture_cube_map;
1821    GLboolean ARB_texture_env_combine;
1822    GLboolean ARB_texture_env_crossbar;
1823    GLboolean ARB_texture_env_dot3;
1824    GLboolean ARB_texture_mirrored_repeat;
1825    GLboolean ARB_texture_non_power_of_two;
1826    GLboolean ARB_transpose_matrix;
1827    GLboolean ARB_vertex_buffer_object;
1828    GLboolean ARB_vertex_program;
1829    GLboolean ARB_window_pos;
1830    GLboolean EXT_abgr;
1831    GLboolean EXT_bgra;
1832    GLboolean EXT_blend_color;
1833    GLboolean EXT_blend_equation_separate;
1834    GLboolean EXT_blend_func_separate;
1835    GLboolean EXT_blend_logic_op;
1836    GLboolean EXT_blend_minmax;
1837    GLboolean EXT_blend_subtract;
1838    GLboolean EXT_clip_volume_hint;
1839    GLboolean EXT_convolution;
1840    GLboolean EXT_compiled_vertex_array;
1841    GLboolean EXT_copy_texture;
1842    GLboolean EXT_depth_bounds_test;
1843    GLboolean EXT_draw_range_elements;
1844    GLboolean EXT_fog_coord;
1845    GLboolean EXT_histogram;
1846    GLboolean EXT_multi_draw_arrays;
1847    GLboolean EXT_paletted_texture;
1848    GLboolean EXT_packed_pixels;
1849    GLboolean EXT_point_parameters;
1850    GLboolean EXT_polygon_offset;
1851    GLboolean EXT_rescale_normal;
1852    GLboolean EXT_shadow_funcs;
1853    GLboolean EXT_secondary_color;
1854    GLboolean EXT_separate_specular_color;
1855    GLboolean EXT_shared_texture_palette;
1856    GLboolean EXT_stencil_wrap;
1857    GLboolean EXT_stencil_two_side;
1858    GLboolean EXT_subtexture;
1859    GLboolean EXT_texture;
1860    GLboolean EXT_texture_object;
1861    GLboolean EXT_texture3D;
1862    GLboolean EXT_texture_compression_s3tc;
1863    GLboolean EXT_texture_env_add;
1864    GLboolean EXT_texture_env_combine;
1865    GLboolean EXT_texture_env_dot3;
1866    GLboolean EXT_texture_filter_anisotropic;
1867    GLboolean EXT_texture_lod_bias;
1868    GLboolean EXT_texture_mirror_clamp;
1869    GLboolean EXT_vertex_array;
1870    GLboolean EXT_vertex_array_set;
1871    /* vendor extensions */
1872    GLboolean APPLE_client_storage;
1873    GLboolean APPLE_packed_pixels;
1874    GLboolean ATI_texture_mirror_once;
1875    GLboolean ATI_texture_env_combine3;
1876    GLboolean HP_occlusion_test;
1877    GLboolean IBM_rasterpos_clip;
1878    GLboolean IBM_multimode_draw_arrays;
1879    GLboolean MESA_pack_invert;
1880    GLboolean MESA_packed_depth_stencil;
1881    GLboolean MESA_program_debug;
1882    GLboolean MESA_resize_buffers;
1883    GLboolean MESA_ycbcr_texture;
1884    GLboolean NV_blend_square;
1885    GLboolean NV_fragment_program;
1886    GLboolean NV_light_max_exponent;
1887    GLboolean NV_point_sprite;
1888    GLboolean NV_texgen_reflection;
1889    GLboolean NV_texture_rectangle;
1890    GLboolean NV_vertex_program;
1891    GLboolean NV_vertex_program1_1;
1892    GLboolean SGI_color_matrix;
1893    GLboolean SGI_color_table;
1894    GLboolean SGI_texture_color_table;
1895    GLboolean SGIS_generate_mipmap;
1896    GLboolean SGIS_pixel_texture;
1897    GLboolean SGIS_texture_edge_clamp;
1898    GLboolean SGIS_texture_lod;
1899    GLboolean SGIX_depth_texture;
1900    GLboolean SGIX_pixel_texture;
1901    GLboolean SGIX_shadow;
1902    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
1903    GLboolean TDFX_texture_compression_FXT1;
1904    GLboolean S3_s3tc;
1905    /*@}*/
1906    /* The extension string */
1907    const GLubyte *String;
1908 };
1909
1910
1911 /**
1912  * A stack of matrices (projection, modelview, color, texture, etc).
1913  */
1914 struct matrix_stack
1915 {
1916    GLmatrix *Top;      /**< points into Stack */
1917    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
1918    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
1919    GLuint MaxDepth;    /**< size of Stack[] array */
1920    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
1921 };
1922
1923
1924 /**
1925  * \name Bits for image transfer operations
1926  *
1927  * \sa __GLcontextRec::ImageTransferState.
1928  */
1929 /*@{*/
1930 #define IMAGE_SCALE_BIAS_BIT                      0x1
1931 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
1932 #define IMAGE_MAP_COLOR_BIT                       0x4
1933 #define IMAGE_COLOR_TABLE_BIT                     0x8
1934 #define IMAGE_CONVOLUTION_BIT                     0x10
1935 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
1936 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
1937 #define IMAGE_COLOR_MATRIX_BIT                    0x80
1938 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
1939 #define IMAGE_HISTOGRAM_BIT                       0x200
1940 #define IMAGE_MIN_MAX_BIT                         0x400
1941
1942 /** Transfer ops up to convolution */
1943 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
1944                                     IMAGE_SHIFT_OFFSET_BIT |   \
1945                                     IMAGE_MAP_COLOR_BIT |      \
1946                                     IMAGE_COLOR_TABLE_BIT)
1947
1948 /** Transfer ops after convolution */
1949 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
1950                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
1951                                      IMAGE_COLOR_MATRIX_BIT |                 \
1952                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
1953                                      IMAGE_HISTOGRAM_BIT |                    \
1954                                      IMAGE_MIN_MAX_BIT)
1955 /*@}*/
1956
1957
1958 /**
1959  * \name Bits to indicate what state has changed.
1960  *
1961  * 4 unused flags.
1962  */
1963 /*@{*/
1964 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
1965 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
1966 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
1967 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
1968 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
1969 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
1970 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
1971 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
1972 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
1973 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
1974 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
1975 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
1976 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
1977 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
1978 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
1979 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
1980 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
1981 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
1982 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
1983 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
1984 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
1985 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
1986 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
1987 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
1988 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
1989 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
1990 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
1991 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
1992 #define _NEW_ALL ~0
1993 /*@}*/
1994
1995
1996 /**
1997  * \name Bits to track array state changes
1998  *
1999  * Also used to summarize array enabled.
2000  */
2001 /*@{*/
2002 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2003 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2004 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2005 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2006 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2007 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2008 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
2009 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
2010 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2011 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2012 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2013 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2014 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2015 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2016 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2017 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2018 #define _NEW_ARRAY_ATTRIB_0         0x10000  /* start at bit 16 */
2019 #define _NEW_ARRAY_ALL              0xffffffff
2020
2021
2022 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2023 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2024 /*@}*/
2025
2026
2027 /**
2028  * \name A bunch of flags that we think might be useful to drivers.
2029  *
2030  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2031  */
2032 /*@{*/
2033 #define DD_FLATSHADE                0x1
2034 #define DD_SEPARATE_SPECULAR        0x2
2035 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2036 #define DD_TRI_LIGHT_TWOSIDE        0x8
2037 #define DD_TRI_UNFILLED             0x10
2038 #define DD_TRI_SMOOTH               0x20
2039 #define DD_TRI_STIPPLE              0x40
2040 #define DD_TRI_OFFSET               0x80
2041 #define DD_LINE_SMOOTH              0x100
2042 #define DD_LINE_STIPPLE             0x200
2043 #define DD_LINE_WIDTH               0x400
2044 #define DD_POINT_SMOOTH             0x800
2045 #define DD_POINT_SIZE               0x1000
2046 #define DD_POINT_ATTEN              0x2000
2047 /*@}*/
2048
2049
2050 /**
2051  * \name Define the state changes under which each of these bits might change
2052  */
2053 /*@{*/
2054 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2055 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2056 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2057 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2058 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2059 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2060 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2061 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2062 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2063 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2064 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2065 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2066 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2067 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2068 /*@}*/
2069
2070
2071 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2072                                            _NEW_TEXTURE |       \
2073                                            _NEW_POINT |         \
2074                                            _NEW_MODELVIEW)
2075
2076 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2077                                            _NEW_TEXTURE)
2078
2079 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2080
2081
2082
2083
2084 /*
2085  * Forward declaration of display list data types:
2086  */
2087 union node;
2088 typedef union node Node;
2089
2090
2091 /* This has to be included here. */
2092 #include "dd.h"
2093
2094
2095 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2096
2097 /**
2098  * Core Mesa's support for tnl modules:
2099  */
2100 struct gl_tnl_module {
2101    /**
2102     * Vertex format to be lazily swapped into current dispatch.
2103     */
2104    GLvertexformat *Current;
2105
2106    /**
2107     * \name Record of functions swapped out.
2108     * On restore, only need to swap these functions back in.
2109     */
2110    /*@{*/
2111    void *Swapped[NUM_VERTEX_FORMAT_ENTRIES][2];
2112    GLuint SwapCount;
2113    /*@}*/
2114 };
2115
2116 struct mesa_list_state {
2117    GLuint CallDepth;            /**< Current recursion calling depth */
2118    Node *CurrentListPtr;        /**< Head of list being compiled */
2119    GLuint CurrentListNum;       /**< Number of the list being compiled */
2120    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2121    GLuint CurrentPos;           /**< Index into current block of nodes */
2122    GLvertexformat ListVtxfmt;
2123
2124    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2125    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2126
2127    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2128    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2129
2130    GLubyte ActiveIndex;
2131    GLfloat CurrentIndex;
2132
2133    GLubyte ActiveEdgeFlag;
2134    GLboolean CurrentEdgeFlag;
2135 };
2136
2137
2138 /**
2139  * Mesa context
2140  *
2141  * This is the central context data structure for Mesa.  Almost all
2142  * OpenGL state is contained in this structure.
2143  * Think of this as a base class from which device drivers will derive
2144  * sub classes.
2145  */
2146 struct __GLcontextRec {
2147    /**
2148     * \name OS related interfaces.
2149     *
2150     * These \b must be the first members of this structure, because they are
2151     * exposed to the outside world (i.e. GLX extension).
2152     */
2153    /*@{*/
2154    __GLimports imports;
2155    __GLexports exports;
2156    /*@}*/
2157
2158    /** State possibly shared with other contexts in the address space */
2159    struct gl_shared_state *Shared;
2160
2161    /** \name API function pointer tables */
2162    /*@{*/
2163    struct _glapi_table *Save;   /**< Display list save functions */
2164    struct _glapi_table *Exec;   /**< Execute functions */
2165    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2166    /*@}*/
2167
2168    GLvisual Visual;
2169    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2170    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2171
2172    /**
2173     * Device driver function pointer table
2174     */
2175    struct dd_function_table Driver;
2176
2177    void *DriverCtx;     /**< Points to device driver context/state */
2178    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2179
2180    /** Core/Driver constants */
2181    struct gl_constants Const;
2182
2183    /** \name The various 4x4 matrix stacks */
2184    /*@{*/
2185    struct matrix_stack ModelviewMatrixStack;
2186    struct matrix_stack ProjectionMatrixStack;
2187    struct matrix_stack ColorMatrixStack;
2188    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2189    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2190    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2191    /*@}*/
2192
2193    /** Combined modelview and projection matrix */
2194    GLmatrix _ModelProjectMatrix;
2195
2196    /** \name Display lists */
2197    struct mesa_list_state ListState;
2198
2199    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2200    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2201
2202    /** Extensions */
2203    struct gl_extensions Extensions;
2204
2205    /** \name Renderer attribute stack */
2206    /*@{*/
2207    GLuint AttribStackDepth;
2208    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2209    /*@}*/
2210
2211    /** \name Renderer attribute groups
2212     *
2213     * We define a struct for each attribute group to make pushing and popping
2214     * attributes easy.  Also it's a good organization.
2215     */
2216    /*@{*/
2217    struct gl_accum_attrib       Accum;          /**< Accumulation buffer attributes */
2218    struct gl_colorbuffer_attrib Color;          /**< Color buffers attributes */
2219    struct gl_current_attrib     Current;        /**< Current attributes */
2220    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2221    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2222    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2223    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2224    struct gl_light_attrib       Light;          /**< Light attributes */
2225    struct gl_line_attrib        Line;           /**< Line attributes */
2226    struct gl_list_attrib        List;           /**< List attributes */
2227    struct gl_multisample_attrib Multisample;
2228    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2229    struct gl_point_attrib       Point;          /**< Point attributes */
2230    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2231    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2232    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2233    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2234    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2235    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2236    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2237    /*@}*/
2238
2239    /** \name Other attribute groups */
2240    /*@{*/
2241    struct gl_histogram_attrib   Histogram;
2242    struct gl_minmax_attrib      MinMax;
2243    struct gl_convolution_attrib Convolution1D;
2244    struct gl_convolution_attrib Convolution2D;
2245    struct gl_convolution_attrib Separable2D;
2246    /*@}*/
2247
2248    /** \name Client attribute stack */
2249    /*@{*/
2250    GLuint ClientAttribStackDepth;
2251    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2252    /*@}*/
2253
2254    /** \name Client attribute groups */
2255    /*@{*/
2256    struct gl_array_attrib       Array;  /**< Vertex arrays */
2257    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2258    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2259
2260    struct gl_evaluators EvalMap;   /**< All evaluators */
2261    struct gl_feedback   Feedback;  /**< Feedback */
2262    struct gl_selection  Select;    /**< Selection */
2263
2264    struct gl_color_table ColorTable;       /**< Pre-convolution */
2265    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2266    struct gl_color_table PostConvolutionColorTable;
2267    struct gl_color_table ProxyPostConvolutionColorTable;
2268    struct gl_color_table PostColorMatrixColorTable;
2269    struct gl_color_table ProxyPostColorMatrixColorTable;
2270
2271    struct program_state Program;             /**< for vertex or fragment progs */
2272    struct vertex_program_state VertexProgram;      /**< GL_NV_vertex_program */
2273    struct fragment_program_state FragmentProgram;  /**< GL_NV_fragment_program */
2274
2275    struct occlusion_state Occlusion;  /**< GL_ARB_occlusion_query */
2276
2277    GLenum ErrorValue;        /**< Last error code */
2278    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2279    GLuint NewState;          /**< bitwise-or of _NEW_* flags */
2280    /*@}*/
2281
2282    /** \name Derived */
2283    /*@{*/
2284    GLuint _TriangleCaps;      /**< bitwise-or of DD_* flags */
2285    GLuint _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2286    GLfloat _EyeZDir[3];
2287    GLfloat _ModelViewInvScale;
2288    GLuint _NeedEyeCoords;
2289    GLuint _ForceEyeCoords;
2290    GLboolean _RotateMode;
2291    GLenum _CurrentProgram;    /* currently executing program */
2292
2293    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2294    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2295    /**@}*/
2296
2297    struct gl_list_extensions listext; /**< driver dlist extensions */
2298
2299
2300    GLboolean OcclusionResult;       /**< for GL_HP_occlusion_test */
2301    GLboolean OcclusionResultSaved;  /**< for GL_HP_occlusion_test */
2302    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2303                     *
2304                     * We don't have a better way to communicate this value from
2305                     * swrast_setup to swrast. */
2306
2307
2308    /** \name Z buffer stuff */
2309    /*@{*/
2310    GLuint DepthMax;     /**< Max depth buffer value */
2311    GLfloat DepthMaxF;   /**< Float max depth buffer value */
2312    GLfloat MRD;         /**< minimum resolvable difference in Z values */
2313    /*@}*/
2314
2315    /** Should 3Dfx Glide driver catch signals? */
2316    GLboolean CatchSignals;
2317
2318    /** \name For debugging/development only */
2319    /*@{*/
2320    GLboolean FirstTimeCurrent;
2321    /*@}*/
2322
2323    /** Dither disable via MESA_NO_DITHER env var */
2324    GLboolean NoDither;
2325
2326    /** Core tnl module support */
2327    struct gl_tnl_module TnlModule;
2328
2329    /**
2330     * \name Hooks for module contexts.
2331     *
2332     * These will eventually live in the driver or elsewhere.
2333     */
2334    /*@{*/
2335    void *swrast_context;
2336    void *swsetup_context;
2337    void *swtnl_context;
2338    void *swtnl_im;
2339    void *acache_context;
2340    void *aelt_context;
2341    /*@}*/
2342 };
2343
2344
2345 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2346 extern const char *_mesa_prim_name[GL_POLYGON+4];
2347
2348
2349 #ifdef MESA_DEBUG
2350 extern int MESA_VERBOSE;
2351 extern int MESA_DEBUG_FLAGS;
2352 # define MESA_FUNCTION __FUNCTION__
2353 #else
2354 # define MESA_VERBOSE 0
2355 # define MESA_DEBUG_FLAGS 0
2356 # define MESA_FUNCTION "a function"
2357 # ifndef NDEBUG
2358 #  define NDEBUG
2359 # endif
2360 #endif
2361
2362
2363 enum _verbose {
2364    VERBOSE_VARRAY               = 0x0001,
2365    VERBOSE_TEXTURE              = 0x0002,
2366    VERBOSE_IMMEDIATE            = 0x0004,
2367    VERBOSE_PIPELINE             = 0x0008,
2368    VERBOSE_DRIVER               = 0x0010,
2369    VERBOSE_STATE                = 0x0020,
2370    VERBOSE_API                  = 0x0040,
2371    VERBOSE_DISPLAY_LIST         = 0x0100,
2372    VERBOSE_LIGHTING             = 0x0200,
2373    VERBOSE_PRIMS                = 0x0400,
2374    VERBOSE_VERTS                = 0x0800
2375 };
2376
2377
2378 enum _debug {
2379    DEBUG_ALWAYS_FLUSH           = 0x1
2380 };
2381
2382
2383
2384 #define Elements(x) sizeof(x)/sizeof(*(x))
2385
2386
2387 #endif /* TYPES_H */