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 #ifdef FIXED_14
 112 #define FIXED_ONE       0x00004000
 113 #define FIXED_HALF      0x00002000
 114 #define FIXED_FRAC_MASK 0x00003FFF
 115 #define FIXED_SCALE     16384.0f
 116 #define FIXED_SHIFT     14
 117 #else
 118 #define FIXED_ONE       0x00000800
 119 #define FIXED_HALF      0x00000400
 120 #define FIXED_FRAC_MASK 0x000007FF
 121 #define FIXED_SCALE     2048.0f
 122 #define FIXED_SHIFT     11
 123 #endif
 124 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
 125 #define FIXED_EPSILON   1
 126 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 127 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 128 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 129 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 130 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 131 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 132 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 133 #define PosFloatToFixed(X)      FloatToFixed(X)
 134 #define SignedFloatToFixed(X)   FloatToFixed(X)
 135
 136
 137
 138 /**
 139  * \name Some forward type declarations
 140  */
 141 /*@{*/
 142 struct _mesa_HashTable;
 143 struct gl_texture_image;
 144 struct gl_texture_object;
 145 typedef struct __GLcontextRec GLcontext;
 146 typedef struct __GLcontextModesRec GLvisual;
 147 typedef struct gl_frame_buffer GLframebuffer;
 148 /*@}*/
 149
 150
 151
 152 /**
 153  * These define the aliases between numbered vertex attributes and
 154  * conventional OpenGL vertex attributes.  We use these values in
 155  * quite a few places.
 156  *
 157  * New in Mesa 4.1.
 158  */
 159 enum {
 160         VERT_ATTRIB_POS = 0,
 161         VERT_ATTRIB_WEIGHT = 1,
 162         VERT_ATTRIB_NORMAL = 2,
 163         VERT_ATTRIB_COLOR0 = 3,
 164         VERT_ATTRIB_COLOR1 = 4,
 165         VERT_ATTRIB_FOG = 5,
 166         VERT_ATTRIB_SIX = 6,
 167         VERT_ATTRIB_SEVEN = 7,
 168         VERT_ATTRIB_TEX0 = 8,
 169         VERT_ATTRIB_TEX1 = 9,
 170         VERT_ATTRIB_TEX2 = 10,
 171         VERT_ATTRIB_TEX3 = 11,
 172         VERT_ATTRIB_TEX4 = 12,
 173         VERT_ATTRIB_TEX5 = 13,
 174         VERT_ATTRIB_TEX6 = 14,
 175         VERT_ATTRIB_TEX7 = 15,
 176         VERT_ATTRIB_MAX = 16
 177 } ;
 178
 179 /* These are used in bitfields in many places */
 180 #define VERT_BIT_POS     (1 << VERT_ATTRIB_POS)
 181 #define VERT_BIT_WEIGHT  (1 << VERT_ATTRIB_WEIGHT)
 182 #define VERT_BIT_NORMAL  (1 << VERT_ATTRIB_NORMAL)
 183 #define VERT_BIT_COLOR0  (1 << VERT_ATTRIB_COLOR0)
 184 #define VERT_BIT_COLOR1  (1 << VERT_ATTRIB_COLOR1)
 185 #define VERT_BIT_FOG     (1 << VERT_ATTRIB_FOG)
 186 #define VERT_BIT_SIX     (1 << VERT_ATTRIB_SIX)
 187 #define VERT_BIT_SEVEN   (1 << VERT_ATTRIB_SEVEN)
 188 #define VERT_BIT_TEX0    (1 << VERT_ATTRIB_TEX0)
 189 #define VERT_BIT_TEX1    (1 << VERT_ATTRIB_TEX1)
 190 #define VERT_BIT_TEX2    (1 << VERT_ATTRIB_TEX2)
 191 #define VERT_BIT_TEX3    (1 << VERT_ATTRIB_TEX3)
 192 #define VERT_BIT_TEX4    (1 << VERT_ATTRIB_TEX4)
 193 #define VERT_BIT_TEX5    (1 << VERT_ATTRIB_TEX5)
 194 #define VERT_BIT_TEX6    (1 << VERT_ATTRIB_TEX6)
 195 #define VERT_BIT_TEX7    (1 << VERT_ATTRIB_TEX7)
 196
 197 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 198
 199
 200 /* Fragment programs use a different but related set of attributes:
 201  */
 202
 203 /* Fragment input registers / attributes */
 204 #define FRAG_ATTRIB_WPOS  0
 205 #define FRAG_ATTRIB_COL0  1
 206 #define FRAG_ATTRIB_COL1  2
 207 #define FRAG_ATTRIB_FOGC  3
 208 #define FRAG_ATTRIB_TEX0  4
 209 #define FRAG_ATTRIB_TEX1  5
 210 #define FRAG_ATTRIB_TEX2  6
 211 #define FRAG_ATTRIB_TEX3  7
 212 #define FRAG_ATTRIB_TEX4  8
 213 #define FRAG_ATTRIB_TEX5  9
 214 #define FRAG_ATTRIB_TEX6  10
 215 #define FRAG_ATTRIB_TEX7  11
 216
 217 /* Bitmasks for the above */
 218 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 219 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 220 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 221 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 222 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 223 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 224 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 225 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 226 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 227 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 228 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 229 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 230
 231 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 232                            FRAG_BIT_TEX1|       \
 233                            FRAG_BIT_TEX2|       \
 234                            FRAG_BIT_TEX3|       \
 235                            FRAG_BIT_TEX4|       \
 236                            FRAG_BIT_TEX5|       \
 237                            FRAG_BIT_TEX6|       \
 238                            FRAG_BIT_TEX7)
 239
 240
 241
 242 /**
 243  * Maximum number of temporary vertices required for clipping.
 244  *
 245  * Used in array_cache and tnl modules.
 246  */
 247 #define MAX_CLIPPED_VERTICES ((2 * (6 + MAX_CLIP_PLANES))+1)
 248
 249
 250 /**
 251  * Data structure for color tables
 252  */
 253 struct gl_color_table {
 254    GLenum Format;         /**< GL_ALPHA, GL_RGB, GL_RGB, etc */
 255    GLenum IntFormat;
 256    GLuint Size;           /**< number of entries (rows) in table */
 257    GLvoid *Table;         /**< either GLfloat * or GLchan * */
 258    GLboolean FloatTable;  /**< are entries stored as floats? */
 259    GLubyte RedSize;
 260    GLubyte GreenSize;
 261    GLubyte BlueSize;
 262    GLubyte AlphaSize;
 263    GLubyte LuminanceSize;
 264    GLubyte IntensitySize;
 265 };
 266
 267
 268 /**
 269  * \name Bit flags used for updating material values.
 270  */
 271 /*@{*/
 272 #define MAT_ATTRIB_FRONT_AMBIENT           0
 273 #define MAT_ATTRIB_BACK_AMBIENT            1
 274 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 275 #define MAT_ATTRIB_BACK_DIFFUSE            3
 276 #define MAT_ATTRIB_FRONT_SPECULAR          4
 277 #define MAT_ATTRIB_BACK_SPECULAR           5
 278 #define MAT_ATTRIB_FRONT_EMISSION          6
 279 #define MAT_ATTRIB_BACK_EMISSION           7
 280 #define MAT_ATTRIB_FRONT_SHININESS         8
 281 #define MAT_ATTRIB_BACK_SHININESS          9
 282 #define MAT_ATTRIB_FRONT_INDEXES           10
 283 #define MAT_ATTRIB_BACK_INDEXES            11
 284 #define MAT_ATTRIB_MAX                     12
 285
 286 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 287 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 288 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 289 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 290 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 291 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 292
 293 #define MAT_INDEX_AMBIENT  0
 294 #define MAT_INDEX_DIFFUSE  1
 295 #define MAT_INDEX_SPECULAR 2
 296
 297 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 298 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 299 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 300 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 301 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 302 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 303 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 304 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 305 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 306 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 307 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 308 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 309
 310
 311 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 312                                  MAT_BIT_FRONT_AMBIENT |        \
 313                                  MAT_BIT_FRONT_DIFFUSE |        \
 314                                  MAT_BIT_FRONT_SPECULAR |       \
 315                                  MAT_BIT_FRONT_SHININESS |      \
 316                                  MAT_BIT_FRONT_INDEXES)
 317
 318 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 319                                  MAT_BIT_BACK_AMBIENT |         \
 320                                  MAT_BIT_BACK_DIFFUSE |         \
 321                                  MAT_BIT_BACK_SPECULAR |        \
 322                                  MAT_BIT_BACK_SHININESS |       \
 323                                  MAT_BIT_BACK_INDEXES)
 324
 325 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 326 /*@}*/
 327
 328
 329 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 330 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 331
 332 /**
 333  * Material shininess lookup table.
 334  */
 335 struct gl_shine_tab {
 336    struct gl_shine_tab *next, *prev;
 337    GLfloat tab[SHINE_TABLE_SIZE+1];
 338    GLfloat shininess;
 339    GLuint refcount;
 340 };
 341
 342
 343 /**
 344  * Light.
 345  */
 346 struct gl_light {
 347    struct gl_light *next;       /**< double linked list with sentinel */
 348    struct gl_light *prev;
 349
 350    GLfloat Ambient[4];          /**< ambient color */
 351    GLfloat Diffuse[4];          /**< diffuse color */
 352    GLfloat Specular[4];         /**< specular color */
 353    GLfloat EyePosition[4];      /**< position in eye coordinates */
 354    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 355    GLfloat SpotExponent;
 356    GLfloat SpotCutoff;          /**< in degrees */
 357    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 358    GLfloat ConstantAttenuation;
 359    GLfloat LinearAttenuation;
 360    GLfloat QuadraticAttenuation;
 361    GLboolean Enabled;           /**< On/off flag */
 362
 363    /**
 364     * \name Derived fields
 365     */
 366    /*@{*/
 367    GLuint _Flags;               /**< State */
 368
 369    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 370    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 371    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 372    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 373    GLfloat _VP_inf_spot_attenuation;
 374
 375    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 376    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 377    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 378    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 379    GLfloat _dli;                /**< CI diffuse light intensity */
 380    GLfloat _sli;                /**< CI specular light intensity */
 381    /*@}*/
 382 };
 383
 384
 385 /**
 386  * Light model.
 387  */
 388 struct gl_lightmodel {
 389    GLfloat Ambient[4];          /**< ambient color */
 390    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 391    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 392    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 393                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 394 };
 395
 396
 397 /**
 398  * Material.
 399  */
 400 struct gl_material
 401 {
 402    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 403 };
 404
 405
 406 /**
 407  * Accumulation buffer attributes.
 408  */
 409 struct gl_accum_attrib {
 410    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 411 };
 412
 413
 414 /**
 415  * \name Clipping planes bits
 416  *
 417  * Used in gl_colorbuffer_attrib::_DrawDestMask and
 418  * gl_colorbuffer_attrib::_ReadSrcMask below to identify color buffers.
 419  */
 420 /*@{*/
 421 #define FRONT_LEFT_BIT  0x1
 422 #define FRONT_RIGHT_BIT 0x2
 423 #define BACK_LEFT_BIT   0x4
 424 #define BACK_RIGHT_BIT  0x8
 425 #define AUX0_BIT        0x10
 426 #define AUX1_BIT        0x20
 427 #define AUX2_BIT        0x40
 428 #define AUX3_BIT        0x80
 429 /*@}*/
 430
 431
 432 /**
 433  * Color buffers attributes.
 434  */
 435 struct gl_colorbuffer_attrib {
 436    GLuint ClearIndex;                   /**< Index to use for glClear */
 437    GLclampf ClearColor[4];              /**< Color to use for glClear */
 438
 439    GLuint IndexMask;                    /**< Color index write mask */
 440    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 441
 442    GLenum DrawBuffer;                   /**< Which buffer to draw into */
 443    GLubyte _DrawDestMask;               /**< bitwise-OR of FRONT/BACK_LEFT/RIGHT_BITs */
 444
 445    /**
 446     * \name alpha testing
 447     */
 448    /*@{*/
 449    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 450    GLenum AlphaFunc;                    /**< Alpha test function */
 451    GLclampf AlphaRef;                   /**< Alpha reference value */
 452    /*@}*/
 453
 454    /**
 455     * \name Blending
 456     */
 457    /*@{*/
 458    GLboolean BlendEnabled;              /**< Blending enabled flag */
 459    GLenum BlendSrcRGB;                  /**< Blending source operator */
 460    GLenum BlendDstRGB;                  /**< Blending destination operator */
 461    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 462    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 463    GLenum BlendEquationRGB;             /**< Blending equation */
 464    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 465    GLfloat BlendColor[4];               /**< Blending color */
 466    /*@}*/
 467
 468    /**
 469     * \name Logic op
 470     */
 471    /*@{*/
 472    GLenum LogicOp;                      /**< Logic operator */
 473    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 474    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 475    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 476    /*@}*/
 477
 478    GLboolean DitherFlag;                /**< Dither enable flag */
 479 };
 480
 481
 482 /**
 483  * Current attributes.
 484  */
 485 struct gl_current_attrib {
 486    /**
 487     * \name Values valid only when FLUSH_VERTICES has been called.
 488     */
 489    /*@{*/
 490    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 491                                                   *  indexed by VERT_ATTRIB_* */
 492    GLfloat Index;                               /**< Current color index */
 493    GLboolean EdgeFlag;                          /**< Current edge flag */
 494    /*@}*/
 495
 496    /**
 497     * \name Values are always valid.
 498     *
 499     * \note BTW, note how similar this set of attributes is to the SWvertex
 500     * data type in the software rasterizer...
 501     */
 502    /*@{*/
 503    GLfloat RasterPos[4];                        /**< Current raster position */
 504    GLfloat RasterDistance;                      /**< Current raster distance */
 505    GLfloat RasterColor[4];                      /**< Current raster color */
 506    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 507    GLfloat RasterIndex;                         /**< Current raster index */
 508    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 509    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 510    /*@}*/
 511 };
 512
 513
 514 /**
 515  * Depth buffer attributes.
 516  */
 517 struct gl_depthbuffer_attrib {
 518    GLenum Func;                 /**< Function for depth buffer compare */
 519    GLclampd Clear;              /**< Value to clear depth buffer to */
 520    GLboolean Test;              /**< Depth buffering enabled flag */
 521    GLboolean Mask;              /**< Depth buffer writable? */
 522    GLboolean OcclusionTest;     /**< GL_HP_occlusion_test */
 523    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 524    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 525 };
 526
 527
 528 /**
 529  * glEnable()/glDisable() attributes.
 530  */
 531 struct gl_enable_attrib {
 532    GLboolean AlphaTest;
 533    GLboolean AutoNormal;
 534    GLboolean Blend;
 535    GLuint ClipPlanes;
 536    GLboolean ColorMaterial;
 537    GLboolean ColorTable;                /* SGI_color_table */
 538    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 539    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 540    GLboolean Convolution1D;
 541    GLboolean Convolution2D;
 542    GLboolean Separable2D;
 543    GLboolean CullFace;
 544    GLboolean DepthTest;
 545    GLboolean Dither;
 546    GLboolean Fog;
 547    GLboolean Histogram;
 548    GLboolean Light[MAX_LIGHTS];
 549    GLboolean Lighting;
 550    GLboolean LineSmooth;
 551    GLboolean LineStipple;
 552    GLboolean IndexLogicOp;
 553    GLboolean ColorLogicOp;
 554    GLboolean Map1Color4;
 555    GLboolean Map1Index;
 556    GLboolean Map1Normal;
 557    GLboolean Map1TextureCoord1;
 558    GLboolean Map1TextureCoord2;
 559    GLboolean Map1TextureCoord3;
 560    GLboolean Map1TextureCoord4;
 561    GLboolean Map1Vertex3;
 562    GLboolean Map1Vertex4;
 563    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 564    GLboolean Map2Color4;
 565    GLboolean Map2Index;
 566    GLboolean Map2Normal;
 567    GLboolean Map2TextureCoord1;
 568    GLboolean Map2TextureCoord2;
 569    GLboolean Map2TextureCoord3;
 570    GLboolean Map2TextureCoord4;
 571    GLboolean Map2Vertex3;
 572    GLboolean Map2Vertex4;
 573    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 574    GLboolean MinMax;
 575    GLboolean Normalize;
 576    GLboolean PixelTexture;
 577    GLboolean PointSmooth;
 578    GLboolean PolygonOffsetPoint;
 579    GLboolean PolygonOffsetLine;
 580    GLboolean PolygonOffsetFill;
 581    GLboolean PolygonSmooth;
 582    GLboolean PolygonStipple;
 583    GLboolean RescaleNormals;
 584    GLboolean Scissor;
 585    GLboolean Stencil;
 586    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 587    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 588    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 589    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 590    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 591    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 592    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 593    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 594    /* SGI_texture_color_table */
 595    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 596    /* GL_NV_vertex_program */
 597    GLboolean VertexProgram;
 598    GLboolean VertexProgramPointSize;
 599    GLboolean VertexProgramTwoSide;
 600    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 601    GLboolean PointSprite;
 602 };
 603
 604
 605 /**
 606  * Eval attributes.
 607  */
 608 struct gl_eval_attrib {
 609    /**
 610     * \name Enable bits
 611     */
 612    /*@{*/
 613    GLboolean Map1Color4;
 614    GLboolean Map1Index;
 615    GLboolean Map1Normal;
 616    GLboolean Map1TextureCoord1;
 617    GLboolean Map1TextureCoord2;
 618    GLboolean Map1TextureCoord3;
 619    GLboolean Map1TextureCoord4;
 620    GLboolean Map1Vertex3;
 621    GLboolean Map1Vertex4;
 622    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 623    GLboolean Map2Color4;
 624    GLboolean Map2Index;
 625    GLboolean Map2Normal;
 626    GLboolean Map2TextureCoord1;
 627    GLboolean Map2TextureCoord2;
 628    GLboolean Map2TextureCoord3;
 629    GLboolean Map2TextureCoord4;
 630    GLboolean Map2Vertex3;
 631    GLboolean Map2Vertex4;
 632    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 633    GLboolean AutoNormal;
 634    /*@}*/
 635
 636    /**
 637     * \name Map Grid endpoints and divisions and calculated du values
 638     */
 639    /*@{*/
 640    GLint MapGrid1un;
 641    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 642    GLint MapGrid2un, MapGrid2vn;
 643    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 644    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 645    /*@}*/
 646 };
 647
 648
 649 /**
 650  * Fog attributes.
 651  */
 652 struct gl_fog_attrib {
 653    GLboolean Enabled;           /**< Fog enabled flag */
 654    GLfloat Color[4];            /**< Fog color */
 655    GLfloat Density;             /**< Density >= 0.0 */
 656    GLfloat Start;               /**< Start distance in eye coords */
 657    GLfloat End;                 /**< End distance in eye coords */
 658    GLfloat Index;               /**< Fog index */
 659    GLenum Mode;                 /**< Fog mode */
 660    GLboolean ColorSumEnabled;
 661    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 662 };
 663
 664
 665 /**
 666  * Hint attributes.
 667  *
 668  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 669  */
 670 struct gl_hint_attrib {
 671    GLenum PerspectiveCorrection;
 672    GLenum PointSmooth;
 673    GLenum LineSmooth;
 674    GLenum PolygonSmooth;
 675    GLenum Fog;
 676    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 677    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 678    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 679 };
 680
 681
 682 /**
 683  * Histogram attributes.
 684  */
 685 struct gl_histogram_attrib {
 686    GLuint Width;                                /**< number of table entries */
 687    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 688    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 689    GLboolean Sink;                              /**< terminate image transfer? */
 690    GLubyte RedSize;                             /**< Bits per counter */
 691    GLubyte GreenSize;
 692    GLubyte BlueSize;
 693    GLubyte AlphaSize;
 694    GLubyte LuminanceSize;
 695 };
 696
 697
 698 struct gl_minmax_attrib {
 699    GLenum Format;
 700    GLboolean Sink;
 701    GLfloat Min[4], Max[4];   /**< RGBA */
 702 };
 703
 704
 705 struct gl_convolution_attrib {
 706    GLenum Format;
 707    GLenum InternalFormat;
 708    GLuint Width;
 709    GLuint Height;
 710    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 711 };
 712
 713
 714 #define LIGHT_SPOT         0x1
 715 #define LIGHT_LOCAL_VIEWER 0x2
 716 #define LIGHT_POSITIONAL   0x4
 717 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 718
 719 /**
 720  * Lighting attributes.
 721  */
 722 struct gl_light_attrib {
 723    struct gl_light Light[MAX_LIGHTS];   /**< Array of lights */
 724    struct gl_lightmodel Model;          /**< Lighting model */
 725
 726    /**
 727     * Must flush FLUSH_VERTICES before referencing:
 728     */
 729    /*@{*/
 730    struct gl_material Material;         /**< Includes front & back values */
 731    /*@}*/
 732
 733    GLboolean Enabled;                   /**< Lighting enabled flag */
 734    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 735    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 736    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 737    GLuint ColorMaterialBitmask;         /**< bitmask formed from Face and Mode */
 738    GLboolean ColorMaterialEnabled;
 739
 740    struct gl_light EnabledList;         /**< List sentinel */
 741
 742    /**
 743     * Derived for optimizations:
 744     */
 745    /*@{*/
 746    GLboolean _NeedEyeCoords;
 747    GLboolean _NeedVertices;             /**< Use fast shader? */
 748    GLuint  _Flags;                      /**< LIGHT_* flags, see above */
 749    GLfloat _BaseColor[2][3];
 750    /*@}*/
 751 };
 752
 753
 754 /**
 755  * Line attributes.
 756  */
 757 struct gl_line_attrib {
 758    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 759    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 760    GLushort StipplePattern;     /**< Stipple pattern */
 761    GLint StippleFactor;         /**< Stipple repeat factor */
 762    GLfloat Width;               /**< Line width */
 763    GLfloat _Width;              /**< Clamped Line width */
 764 };
 765
 766
 767 struct gl_list_attrib {
 768    GLuint ListBase;
 769 };
 770
 771
 772 struct gl_list_opcode {
 773    GLuint size;
 774    void (*execute)( GLcontext *ctx, void *data );
 775    void (*destroy)( GLcontext *ctx, void *data );
 776    void (*print)( GLcontext *ctx, void *data );
 777 };
 778
 779 #define GL_MAX_EXT_OPCODES 16
 780
 781 struct gl_list_extensions {
 782    struct gl_list_opcode opcode[GL_MAX_EXT_OPCODES];
 783    GLuint nr_opcodes;
 784 };
 785
 786
 787 struct gl_multisample_attrib {
 788    GLboolean Enabled;
 789    GLboolean SampleAlphaToCoverage;
 790    GLboolean SampleAlphaToOne;
 791    GLboolean SampleCoverage;
 792    GLfloat SampleCoverageValue;
 793    GLboolean SampleCoverageInvert;
 794 };
 795
 796
 797 /**
 798  * Pixel attributes.
 799  */
 800 struct gl_pixel_attrib {
 801    GLenum ReadBuffer;           /**< source buffer for glReadPixels()/glCopyPixels() */
 802    GLubyte _ReadSrcMask;        /**< Not really a mask, but like _DrawDestMask
 803                                   *
 804                                   * May be: FRONT_LEFT_BIT, BACK_LEFT_BIT,
 805                                   * FRONT_RIGHT_BIT or BACK_RIGHT_BIT. */
 806    GLfloat RedBias, RedScale;
 807    GLfloat GreenBias, GreenScale;
 808    GLfloat BlueBias, BlueScale;
 809    GLfloat AlphaBias, AlphaScale;
 810    GLfloat DepthBias, DepthScale;
 811    GLint IndexShift, IndexOffset;
 812    GLboolean MapColorFlag;
 813    GLboolean MapStencilFlag;
 814    GLfloat ZoomX, ZoomY;
 815    /* XXX move these out of gl_pixel_attrib */
 816    GLint MapStoSsize;           /**< Size of each pixel map */
 817    GLint MapItoIsize;
 818    GLint MapItoRsize;
 819    GLint MapItoGsize;
 820    GLint MapItoBsize;
 821    GLint MapItoAsize;
 822    GLint MapRtoRsize;
 823    GLint MapGtoGsize;
 824    GLint MapBtoBsize;
 825    GLint MapAtoAsize;
 826    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 827    GLint MapItoI[MAX_PIXEL_MAP_TABLE];
 828    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 829    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 830    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 831    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 832    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 833    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 834    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 835    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 836    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 837    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 838    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 839    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 840    /** GL_EXT_histogram */
 841    GLboolean HistogramEnabled;
 842    GLboolean MinMaxEnabled;
 843    /** GL_SGIS_pixel_texture */
 844    GLboolean PixelTextureEnabled;
 845    GLenum FragmentRgbSource;
 846    GLenum FragmentAlphaSource;
 847    /** GL_SGI_color_matrix */
 848    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 849    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 850    /** GL_SGI_color_table */
 851    GLfloat ColorTableScale[4];
 852    GLfloat ColorTableBias[4];
 853    GLboolean ColorTableEnabled;
 854    GLfloat PCCTscale[4];
 855    GLfloat PCCTbias[4];
 856    GLboolean PostConvolutionColorTableEnabled;
 857    GLfloat PCMCTscale[4];
 858    GLfloat PCMCTbias[4];
 859    GLboolean PostColorMatrixColorTableEnabled;
 860    /** GL_SGI_texture_color_table */
 861    GLfloat TextureColorTableScale[4];
 862    GLfloat TextureColorTableBias[4];
 863    /** Convolution */
 864    GLboolean Convolution1DEnabled;
 865    GLboolean Convolution2DEnabled;
 866    GLboolean Separable2DEnabled;
 867    GLfloat ConvolutionBorderColor[3][4];
 868    GLenum ConvolutionBorderMode[3];
 869    GLfloat ConvolutionFilterScale[3][4];
 870    GLfloat ConvolutionFilterBias[3][4];
 871    GLfloat PostConvolutionScale[4];  /**< RGBA */
 872    GLfloat PostConvolutionBias[4];   /**< RGBA */
 873 };
 874
 875
 876 /**
 877  * Point attributes.
 878  */
 879 struct gl_point_attrib {
 880    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 881    GLfloat Size;                /**< User-specified point size */
 882    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
 883    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 884    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 885    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 886    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 887    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
 888    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV_point_sprite / GL_NV_point_sprite */
 889    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 890 };
 891
 892
 893 /**
 894  * Polygon attributes.
 895  */
 896 struct gl_polygon_attrib {
 897    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
 898    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
 899    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
 900    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
 901    GLboolean CullFlag;          /**< Culling on/off flag */
 902    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
 903    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
 904    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
 905    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
 906    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
 907    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
 908    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
 909    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
 910 };
 911
 912
 913 /**
 914  * Scissor attributes.
 915  */
 916 struct gl_scissor_attrib {
 917    GLboolean Enabled;           /**< Scissor test enabled? */
 918    GLint X, Y;                  /**< Lower left corner of box */
 919    GLsizei Width, Height;       /**< Size of box */
 920 };
 921
 922
 923 /**
 924  * Stencil attributes.
 925  */
 926 struct gl_stencil_attrib {
 927    GLboolean Enabled;           /**< Enabled flag */
 928    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
 929    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
 930    GLenum Function[2];          /**< Stencil function */
 931    GLenum FailFunc[2];          /**< Fail function */
 932    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
 933    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
 934    GLstencil Ref[2];            /**< Reference value */
 935    GLstencil ValueMask[2];      /**< Value mask */
 936    GLstencil WriteMask[2];      /**< Write mask */
 937    GLstencil Clear;             /**< Clear value */
 938 };
 939
 940
 941 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
 942
 943 #define TEXTURE_1D_INDEX    0
 944 #define TEXTURE_2D_INDEX    1
 945 #define TEXTURE_3D_INDEX    2
 946 #define TEXTURE_CUBE_INDEX  3
 947 #define TEXTURE_RECT_INDEX  4
 948
 949 /* Texture.Unit[]._ReallyEnabled flags: */
 950 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
 951 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
 952 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
 953 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
 954 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
 955
 956
 957 /* TexGenEnabled flags */
 958 #define S_BIT 1
 959 #define T_BIT 2
 960 #define R_BIT 4
 961 #define Q_BIT 8
 962
 963 /* Bitmap versions of the GL_ constants. */
 964 #define TEXGEN_SPHERE_MAP        0x1
 965 #define TEXGEN_OBJ_LINEAR        0x2
 966 #define TEXGEN_EYE_LINEAR        0x4
 967 #define TEXGEN_REFLECTION_MAP_NV 0x8
 968 #define TEXGEN_NORMAL_MAP_NV     0x10
 969
 970 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
 971                                   TEXGEN_REFLECTION_MAP_NV | \
 972                                   TEXGEN_NORMAL_MAP_NV)
 973 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
 974                                   TEXGEN_REFLECTION_MAP_NV | \
 975                                   TEXGEN_NORMAL_MAP_NV     | \
 976                                   TEXGEN_EYE_LINEAR)
 977
 978 /* A selection of state flags to make driver and module's lives easier. */
 979 #define ENABLE_TEXGEN0        0x1
 980 #define ENABLE_TEXGEN1        0x2
 981 #define ENABLE_TEXGEN2        0x4
 982 #define ENABLE_TEXGEN3        0x8
 983 #define ENABLE_TEXGEN4        0x10
 984 #define ENABLE_TEXGEN5        0x20
 985 #define ENABLE_TEXGEN6        0x40
 986 #define ENABLE_TEXGEN7        0x80
 987
 988 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
 989 #define ENABLE_TEXMAT1        0x2
 990 #define ENABLE_TEXMAT2        0x4
 991 #define ENABLE_TEXMAT3        0x8
 992 #define ENABLE_TEXMAT4        0x10
 993 #define ENABLE_TEXMAT5        0x20
 994 #define ENABLE_TEXMAT6        0x40
 995 #define ENABLE_TEXMAT7        0x80
 996
 997 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
 998 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
 999
1000
1001 /**
1002  * Texel fetch function prototype.  We use texel fetch functions to
1003  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1004  * texture images.  These functions help to isolate us from the gritty
1005  * details of all the various texture image encodings.
1006  *
1007  * \param texImage texture image.
1008  * \param col texel column.
1009  * \param row texel row.
1010  * \param img texel image level/layer.
1011  * \param texelOut output texel (up to 4 GLchans)
1012  */
1013 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1014                                  GLint col, GLint row, GLint img,
1015                                  GLchan *texelOut );
1016
1017 /**
1018  * As above, but returns floats.
1019  * Used for depth component images and for upcoming signed/float
1020  * texture images.
1021  */
1022 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1023                                  GLint col, GLint row, GLint img,
1024                                  GLfloat *texelOut );
1025
1026 /**
1027  * Texture format record
1028  */
1029 struct gl_texture_format {
1030    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1031
1032    GLenum BaseFormat;           /**< Either GL_ALPHA, GL_INTENSITY, GL_LUMINANCE,
1033                                  *   GL_LUMINANCE_ALPHA, GL_RGB, GL_RGBA,
1034                                  *   GL_COLOR_INDEX or GL_DEPTH_COMPONENT.
1035                                  */
1036    GLubyte RedBits;             /**< Bits per texel component */
1037    GLubyte GreenBits;           /**< These are just rough approximations for */
1038    GLubyte BlueBits;            /**< compressed texture formats. */
1039    GLubyte AlphaBits;
1040    GLubyte LuminanceBits;
1041    GLubyte IntensityBits;
1042    GLubyte IndexBits;
1043    GLubyte DepthBits;
1044
1045    GLint TexelBytes;            /**< Bytes per texel (0 for compressed formats */
1046
1047    /**
1048     * \name Texel fetch function pointers
1049     */
1050    /*@{*/
1051    FetchTexelFuncC FetchTexel1D;
1052    FetchTexelFuncC FetchTexel2D;
1053    FetchTexelFuncC FetchTexel3D;
1054    FetchTexelFuncF FetchTexel1Df;
1055    FetchTexelFuncF FetchTexel2Df;
1056    FetchTexelFuncF FetchTexel3Df;
1057    /*@}*/
1058 };
1059
1060
1061 /**
1062  * Texture image record
1063  */
1064 struct gl_texture_image {
1065    GLenum Format;               /**< GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1066                                  *    GL_INTENSITY, GL_RGB, GL_RGBA,
1067                                  *    GL_COLOR_INDEX or GL_DEPTH_COMPONENT only.
1068                                  *    Used for choosing TexEnv arithmetic.
1069                                  */
1070    GLint IntFormat;             /**< Internal format as given by the user */
1071    GLuint Border;               /**< 0 or 1 */
1072    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1073    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1074    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1075    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1076    GLuint Width2;               /**< = Width - 2*Border */
1077    GLuint Height2;              /**< = Height - 2*Border */
1078    GLuint Depth2;               /**< = Depth - 2*Border */
1079    GLuint WidthLog2;            /**< = log2(Width2) */
1080    GLuint HeightLog2;           /**< = log2(Height2) */
1081    GLuint DepthLog2;            /**< = log2(Depth2) */
1082    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1083    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1084    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1085    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1086    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1087    GLboolean IsClientData;      /**< Data owned by client? */
1088    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1089
1090    const struct gl_texture_format *TexFormat;
1091
1092    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1093    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1094
1095    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1096    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1097
1098    /**
1099     * \name For device driver:
1100     */
1101    /*@{*/
1102    void *DriverData;            /**< Arbitrary device driver data */
1103    /*@}*/
1104 };
1105
1106 #define FACE_POS_X   0
1107 #define FACE_NEG_X   1
1108 #define FACE_POS_Y   2
1109 #define FACE_NEG_Y   3
1110 #define FACE_POS_Z   4
1111 #define FACE_NEG_Z   5
1112 #define MAX_FACES  6
1113
1114 /**
1115  * Texture object record
1116  */
1117 struct gl_texture_object {
1118    _glthread_Mutex Mutex;       /**< for thread safety */
1119    GLint RefCount;              /**< reference count */
1120    GLuint Name;                 /**< an unsigned integer */
1121    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1122    GLfloat Priority;            /**< in [0,1] */
1123    GLfloat BorderColor[4];      /**< unclamped */
1124    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1125    /** \name Wrap modes
1126     * Are GL_CLAMP, REPEAT, GL_CLAMP_TO_EDGE, and GL_CLAMP_TO_BORDER_ARB. */
1127    /*@{*/
1128    GLenum WrapS;
1129    GLenum WrapT;
1130    GLenum WrapR;
1131    /*@}*/
1132    GLenum MinFilter;            /**< minification filter */
1133    GLenum MagFilter;            /**< magnification filter */
1134    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1135    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1136    GLfloat LodBias;             /**< OpenGL 1.4 */
1137    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1138    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1139    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1140    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1141    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1142    GLfloat ShadowAmbient;
1143    GLenum CompareMode;          /**< GL_ARB_shadow */
1144    GLenum CompareFunc;          /**< GL_ARB_shadow */
1145    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1146    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1147    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1148    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1149    GLboolean _IsPowerOfTwo;     /**< Are all image dimensions powers of two? */
1150
1151    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1152
1153    /** GL_EXT_paletted_texture */
1154    struct gl_color_table Palette;
1155
1156    GLboolean Complete;                  /**< Is texture object complete? */
1157    struct gl_texture_object *Next;      /**< Next in linked list */
1158
1159    /**
1160     * \name For device driver
1161     */
1162    /*@{*/
1163    void *DriverData;    /**< Arbitrary device driver data */
1164    /*@}*/
1165 };
1166
1167
1168 /**
1169  * Texture unit record
1170  */
1171 struct gl_texture_unit {
1172    GLuint Enabled;              /**< bitmask of TEXTURE_*_BIT flags */
1173    GLuint _ReallyEnabled;       /**< 0 or exactly one of TEXTURE_*_BIT flags */
1174
1175    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1176    GLfloat EnvColor[4];
1177    GLuint TexGenEnabled;        /**< Bitwise-OR of [STRQ]_BIT values */
1178    /** \name Tex coord generation mode
1179     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1180    /*@{*/
1181    GLenum GenModeS;
1182    GLenum GenModeT;
1183    GLenum GenModeR;
1184    GLenum GenModeQ;
1185    /*@}*/
1186    GLuint _GenBitS;
1187    GLuint _GenBitT;
1188    GLuint _GenBitR;
1189    GLuint _GenBitQ;
1190    GLuint _GenFlags;            /**< bitwise or of GenBit[STRQ] */
1191    GLfloat ObjectPlaneS[4];
1192    GLfloat ObjectPlaneT[4];
1193    GLfloat ObjectPlaneR[4];
1194    GLfloat ObjectPlaneQ[4];
1195    GLfloat EyePlaneS[4];
1196    GLfloat EyePlaneT[4];
1197    GLfloat EyePlaneR[4];
1198    GLfloat EyePlaneQ[4];
1199    GLfloat LodBias;             /**< for biasing mipmap levels */
1200
1201    /**
1202     * \name GL_EXT_texture_env_combine
1203     */
1204    /*@{*/
1205    GLenum CombineModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1206    GLenum CombineModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1207    GLenum CombineSourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1208    GLenum CombineSourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1209    GLenum CombineOperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1210    GLenum CombineOperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1211    GLuint CombineScaleShiftRGB; /**< 0, 1 or 2 */
1212    GLuint CombineScaleShiftA;   /**< 0, 1 or 2 */
1213    /*@}*/
1214
1215    struct gl_texture_object *Current1D;
1216    struct gl_texture_object *Current2D;
1217    struct gl_texture_object *Current3D;
1218    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1219    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1220
1221    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1222
1223    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1224    struct gl_texture_object Saved2D;
1225    struct gl_texture_object Saved3D;
1226    struct gl_texture_object SavedCubeMap;
1227    struct gl_texture_object SavedRect;
1228
1229    /* GL_SGI_texture_color_table */
1230    struct gl_color_table ColorTable;
1231    struct gl_color_table ProxyColorTable;
1232    GLboolean ColorTableEnabled;
1233 };
1234
1235
1236 /**
1237  * Texture attributes
1238  */
1239 struct gl_texture_attrib {
1240    /**
1241     * name multitexture
1242     */
1243    /**@{*/
1244    GLuint CurrentUnit;          /**< Active texture unit */
1245    GLuint _EnabledUnits;        /**< one bit set for each really-enabled unit */
1246    GLuint _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1247    GLuint _GenFlags;            /**< for texgen */
1248    GLuint _TexGenEnabled;
1249    GLuint _TexMatEnabled;
1250    /**@}*/
1251
1252    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1253
1254    struct gl_texture_object *Proxy1D;
1255    struct gl_texture_object *Proxy2D;
1256    struct gl_texture_object *Proxy3D;
1257    struct gl_texture_object *ProxyCubeMap;
1258    struct gl_texture_object *ProxyRect;
1259
1260    /** GL_EXT_shared_texture_palette */
1261    GLboolean SharedPalette;
1262    struct gl_color_table Palette;
1263 };
1264
1265
1266 /**
1267  * Transformation attributes.
1268  */
1269 struct gl_transform_attrib {
1270    GLenum MatrixMode;                           /**< Matrix mode */
1271    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1272    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1273    GLuint ClipPlanesEnabled;                    /**< on/off bitmask */
1274    GLboolean Normalize;                         /**< Normalize all normals? */
1275    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1276    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1277 };
1278
1279
1280 /**
1281  * Viewport attributes.
1282  */
1283 struct gl_viewport_attrib {
1284    GLint X, Y;                  /**< position */
1285    GLsizei Width, Height;       /**< size */
1286    GLfloat Near, Far;           /**< Depth buffer range */
1287    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1288 };
1289
1290
1291 /**
1292  * Node for the attribute stack
1293  */
1294 struct gl_attrib_node {
1295    GLbitfield kind;
1296    void *data;
1297    struct gl_attrib_node *next;
1298 };
1299
1300
1301 /**
1302  * GL_ARB_vertex_buffer_object buffer object
1303  */
1304 struct gl_buffer_object {
1305    GLint RefCount;
1306    GLuint Name;
1307    GLenum Usage;
1308    GLenum Access;
1309    GLvoid *Pointer;   /**< Only valid while buffer is mapped */
1310    GLuint Size;       /**< Size of data array in bytes */
1311    GLubyte *Data;     /**< The storage */
1312 };
1313
1314
1315
1316 /**
1317  * Client pixel packing/unpacking attributes
1318  */
1319 struct gl_pixelstore_attrib {
1320    GLint Alignment;
1321    GLint RowLength;
1322    GLint SkipPixels;
1323    GLint SkipRows;
1324    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1325    GLint SkipImages;      /**< for GL_EXT_texture3D */
1326    GLboolean SwapBytes;
1327    GLboolean LsbFirst;
1328    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1329    GLboolean Invert;        /**< GL_MESA_pack_invert */
1330 };
1331
1332
1333 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1334
1335
1336 /**
1337  * Client vertex array attributes
1338  */
1339 struct gl_client_array {
1340    GLint Size;
1341    GLenum Type;
1342    GLsizei Stride;              /**< user-specified stride */
1343    GLsizei StrideB;             /**< actual stride in bytes */
1344    const GLubyte *Ptr;
1345    GLuint Enabled;              /**< one of the _NEW_ARRAY_ bits */
1346    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1347
1348    /**< GL_ARB_vertex_buffer_object */
1349    struct gl_buffer_object *BufferObj;
1350    GLuint _MaxElement;
1351
1352    GLuint Flags;
1353 };
1354
1355
1356 /**
1357  * Array attributes.
1358  */
1359 struct gl_array_attrib {
1360    struct gl_client_array Vertex;            /**< client data descriptors */
1361    struct gl_client_array Normal;
1362    struct gl_client_array Color;
1363    struct gl_client_array SecondaryColor;
1364    struct gl_client_array FogCoord;
1365    struct gl_client_array Index;
1366    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1367    struct gl_client_array EdgeFlag;
1368
1369    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1370
1371    GLint ActiveTexture;         /**< Client Active Texture */
1372    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1373    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1374
1375    GLuint _Enabled;             /**< _NEW_ARRAY_* - bit set if array enabled */
1376    GLuint NewState;             /**< _NEW_ARRAY_* */
1377
1378 #if FEATURE_ARB_vertex_buffer_object
1379    struct gl_buffer_object *NullBufferObj;
1380    struct gl_buffer_object *ArrayBufferObj;
1381    struct gl_buffer_object *ElementArrayBufferObj;
1382 #endif
1383    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1384 };
1385
1386
1387 struct gl_feedback {
1388    GLenum Type;
1389    GLuint _Mask;                /* FB_* bits */
1390    GLfloat *Buffer;
1391    GLuint BufferSize;
1392    GLuint Count;
1393 };
1394
1395
1396 /**
1397  * Selection attributes.
1398  */
1399 struct gl_selection {
1400    GLuint *Buffer;      /**< selection buffer */
1401    GLuint BufferSize;   /**< size of the selection buffer */
1402    GLuint BufferCount;  /**< number of values in the selection buffer */
1403    GLuint Hits;         /**< number of records in the selection buffer */
1404    GLuint NameStackDepth; /**< name stack depth */
1405    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1406    GLboolean HitFlag;   /**< hit flag */
1407    GLfloat HitMinZ;     /**< minimum hit depth */
1408    GLfloat HitMaxZ;     /**< maximum hit depth */
1409 };
1410
1411
1412 /**
1413  * 1-D Evaluator control points
1414  */
1415 struct gl_1d_map
1416 {
1417    GLuint Order;        /**< Number of control points */
1418    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1419    GLfloat *Points;     /**< Points to contiguous control points */
1420 };
1421
1422
1423 /**
1424  * 2-D Evaluator control points
1425  */
1426 struct gl_2d_map
1427 {
1428    GLuint Uorder;               /**< Number of control points in U dimension */
1429    GLuint Vorder;               /**< Number of control points in V dimension */
1430    GLfloat u1, u2, du;
1431    GLfloat v1, v2, dv;
1432    GLfloat *Points;             /**< Points to contiguous control points */
1433 };
1434
1435
1436 /**
1437  * All evaluator control points
1438  */
1439 struct gl_evaluators
1440 {
1441    /**
1442     * \name 1-D maps
1443     */
1444    /*@{*/
1445    struct gl_1d_map Map1Vertex3;
1446    struct gl_1d_map Map1Vertex4;
1447    struct gl_1d_map Map1Index;
1448    struct gl_1d_map Map1Color4;
1449    struct gl_1d_map Map1Normal;
1450    struct gl_1d_map Map1Texture1;
1451    struct gl_1d_map Map1Texture2;
1452    struct gl_1d_map Map1Texture3;
1453    struct gl_1d_map Map1Texture4;
1454    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1455    /*@}*/
1456
1457    /**
1458     * \name 2-D maps
1459     */
1460    /*@{*/
1461    struct gl_2d_map Map2Vertex3;
1462    struct gl_2d_map Map2Vertex4;
1463    struct gl_2d_map Map2Index;
1464    struct gl_2d_map Map2Color4;
1465    struct gl_2d_map Map2Normal;
1466    struct gl_2d_map Map2Texture1;
1467    struct gl_2d_map Map2Texture2;
1468    struct gl_2d_map Map2Texture3;
1469    struct gl_2d_map Map2Texture4;
1470    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1471    /*@}*/
1472 };
1473
1474
1475 /**
1476  * NV_fragment_program runtime state
1477  */
1478 struct fp_machine
1479 {
1480    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1481    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1482    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1483    GLuint CondCodes[4];
1484 };
1485
1486
1487 /**
1488  * Names of the various vertex/fragment register files
1489  */
1490 enum register_file
1491 {
1492    PROGRAM_TEMPORARY = 10,
1493    PROGRAM_INPUT,
1494    PROGRAM_OUTPUT,
1495    PROGRAM_LOCAL_PARAM,
1496    PROGRAM_ENV_PARAM,
1497    PROGRAM_NAMED_PARAM,
1498    PROGRAM_STATE_VAR,
1499    PROGRAM_WRITE_ONLY,
1500         PROGRAM_ADDRESS
1501 };
1502
1503
1504 /* Vertex and fragment instructions */
1505 struct vp_instruction;
1506 struct fp_instruction;
1507
1508 struct program_parameter_list;
1509
1510
1511 /**
1512  * Base class for any kind of program object
1513  */
1514 struct program
1515 {
1516    GLuint Id;
1517    GLubyte *String;    /* Null-terminated program text */
1518    GLenum Target;
1519    GLenum Format;      /* String encoding format */
1520    GLint RefCount;
1521    GLboolean Resident;
1522    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1523    GLuint NumInstructions;  /* GL_ARB_vertex/fragment_program */
1524    GLuint NumTemporaries;
1525    GLuint NumParameters;
1526    GLuint NumAttributes;
1527    GLuint NumAddressRegs;
1528 };
1529
1530
1531 /** Vertex program object */
1532 struct vertex_program
1533 {
1534    struct program Base;   /* base class */
1535    struct vp_instruction *Instructions;  /* Compiled instructions */
1536    GLboolean IsPositionInvariant;  /* GL_NV_vertex_program1_1 */
1537    GLuint InputsRead;     /* Bitmask of which input regs are read */
1538    GLuint OutputsWritten; /* Bitmask of which output regs are written to */
1539    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1540 };
1541
1542
1543 /** Fragment program object */
1544 struct fragment_program
1545 {
1546    struct program Base;   /**< base class */
1547    struct fp_instruction *Instructions;  /**< Compiled instructions */
1548    GLuint InputsRead;     /**< Bitmask of which input regs are read */
1549    GLuint OutputsWritten; /**< Bitmask of which output regs are written to */
1550    GLuint TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_INDEX bitmask */
1551    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1552    GLuint NumTexInstructions;
1553    GLuint NumTexIndirections;
1554    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1555 };
1556
1557
1558 /**
1559  * State common to vertex and fragment programs.
1560  */
1561 struct program_state {
1562    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_NV */
1563    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_NV */
1564 };
1565
1566
1567 /**
1568  * State vars for GL_NV_vertex_program
1569  */
1570 struct vertex_program_state
1571 {
1572    GLboolean Enabled;                    /**< GL_VERTEX_PROGRAM_NV */
1573    GLboolean PointSizeEnabled;           /**< GL_VERTEX_PROGRAM_POINT_SIZE_NV */
1574    GLboolean TwoSideEnabled;             /**< GL_VERTEX_PROGRAM_TWO_SIDE_NV */
1575    struct vertex_program *Current;       /**< ptr to currently bound program */
1576
1577    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1578    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1579
1580    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1581    /* Only used during program execution (may be moved someday): */
1582    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1583    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1584    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1585    GLint AddressReg[4];
1586
1587 #if FEATURE_MESA_program_debug
1588    GLprogramcallbackMESA Callback;
1589    GLvoid *CallbackData;
1590    GLboolean CallbackEnabled;
1591    GLuint CurrentPosition;
1592 #endif
1593 };
1594
1595
1596 /*
1597  * State for GL_ARB/NV_fragment_program
1598  */
1599 struct fragment_program_state
1600 {
1601    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1602    struct fragment_program *Current;     /* ptr to currently bound program */
1603    struct fp_machine Machine;            /* machine state */
1604    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1605
1606 #if FEATURE_MESA_program_debug
1607    GLprogramcallbackMESA Callback;
1608    GLvoid *CallbackData;
1609    GLboolean CallbackEnabled;
1610    GLuint CurrentPosition;
1611 #endif
1612 };
1613
1614
1615 /*
1616  * State for GL_ARB_occlusion_query
1617  */
1618 struct occlusion_state
1619 {
1620    GLboolean Active;
1621    GLuint CurrentQueryObject;
1622    GLuint PassedCounter;
1623    struct _mesa_HashTable *QueryObjects;
1624 };
1625
1626
1627 /**
1628  * State which can be shared by multiple contexts:
1629  */
1630 struct gl_shared_state
1631 {
1632    _glthread_Mutex Mutex;                  /**< for thread safety */
1633    GLint RefCount;                         /**< Reference count */
1634    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
1635    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
1636    struct gl_texture_object *TexObjectList;/**< Linked list of texture objects */
1637
1638    /**
1639     * \name Default texture objects (shared by all multi-texture units)
1640     */
1641    /*@{*/
1642    struct gl_texture_object *Default1D;
1643    struct gl_texture_object *Default2D;
1644    struct gl_texture_object *Default3D;
1645    struct gl_texture_object *DefaultCubeMap;
1646    struct gl_texture_object *DefaultRect;
1647    /*@}*/
1648
1649    /**
1650     * \name GL_NV_vertex/_program
1651     */
1652    /*@{*/
1653    struct _mesa_HashTable *Programs;
1654 #if FEATURE_ARB_vertex_program
1655    struct program *DefaultVertexProgram;
1656 #endif
1657 #if FEATURE_ARB_fragment_program
1658    struct program *DefaultFragmentProgram;
1659 #endif
1660    /*@}*/
1661
1662 #if FEATURE_ARB_vertex_buffer_object
1663    struct _mesa_HashTable *BufferObjects;
1664 #endif
1665
1666    void *DriverData;  /**< Device driver shared state */
1667 };
1668
1669
1670 /**
1671  * Frame buffer.
1672  *
1673  * A "frame buffer" is a color buffer and its optional ancillary buffers:
1674  * depth, accum, stencil, and software-simulated alpha buffers.
1675  * In C++ terms, think of this as a base class from which device drivers
1676  * will make derived classes.
1677  */
1678 struct gl_frame_buffer
1679 {
1680    GLvisual Visual;             /**< The corresponding visual */
1681
1682    GLuint Width, Height;        /**< size of frame buffer in pixels */
1683
1684    GLboolean UseSoftwareDepthBuffer;
1685    GLboolean UseSoftwareAccumBuffer;
1686    GLboolean UseSoftwareStencilBuffer;
1687    GLboolean UseSoftwareAlphaBuffers;
1688
1689    /** \name Software depth (aka Z) buffer */
1690    /*@{*/
1691    GLvoid *DepthBuffer;         /**< array [Width*Height] of GLushort or GLuint*/
1692    /*@}*/
1693
1694    /** \name Software stencil buffer */
1695    /*@{*/
1696    GLstencil *Stencil;          /**< array [Width*Height] of GLstencil values */
1697    /*@}*/
1698
1699    /** \name Software accumulation buffer */
1700    /*@{*/
1701    GLaccum *Accum;              /**< array [4*Width*Height] of GLaccum values */
1702    /*@}*/
1703
1704    /** \name Software alpha planes */
1705    /*@{*/
1706    GLchan *FrontLeftAlpha;      /**< array [Width*Height] of GLchan */
1707    GLchan *BackLeftAlpha;       /**< array [Width*Height] of GLchan */
1708    GLchan *FrontRightAlpha;     /**< array [Width*Height] of GLchan */
1709    GLchan *BackRightAlpha;      /**< array [Width*Height] of GLchan */
1710    /*@}*/
1711
1712    /**
1713     * \name Drawing bounds
1714     *
1715     * Intersection of window size and scissor box
1716     */
1717    /*@{*/
1718    GLint _Xmin;  /**< inclusive */
1719    GLint _Ymin;  /**< inclusive */
1720    GLint _Xmax;  /**< exclusive */
1721    GLint _Ymax;  /**< exclusive */
1722    /*@}*/
1723 };
1724
1725
1726 /**
1727  * Constants which may be overridden by device driver during context creation
1728  * but are never changed after that.
1729  */
1730 struct gl_constants
1731 {
1732    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
1733    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
1734    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
1735    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
1736    GLuint MaxTextureCoordUnits;
1737    GLuint MaxTextureImageUnits;
1738    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
1739    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
1740    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
1741    GLuint MaxArrayLockSize;
1742    GLint SubPixelBits;
1743    GLfloat MinPointSize, MaxPointSize;          /* aliased */
1744    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
1745    GLfloat PointSizeGranularity;
1746    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
1747    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
1748    GLfloat LineWidthGranularity;
1749    GLuint NumAuxBuffers;
1750    GLuint MaxColorTableSize;
1751    GLuint MaxConvolutionWidth;
1752    GLuint MaxConvolutionHeight;
1753    GLuint MaxClipPlanes;
1754    GLuint MaxLights;
1755    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
1756    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
1757    /* GL_ARB_vertex_program */
1758    GLuint MaxVertexProgramInstructions;
1759    GLuint MaxVertexProgramAttribs;
1760    GLuint MaxVertexProgramTemps;
1761    GLuint MaxVertexProgramLocalParams;
1762    GLuint MaxVertexProgramEnvParams;
1763    GLuint MaxVertexProgramAddressRegs;
1764    /* GL_ARB_fragment_program */
1765    GLuint MaxFragmentProgramInstructions;
1766    GLuint MaxFragmentProgramAttribs;
1767    GLuint MaxFragmentProgramTemps;
1768    GLuint MaxFragmentProgramLocalParams;
1769    GLuint MaxFragmentProgramEnvParams;
1770    GLuint MaxFragmentProgramAddressRegs;
1771    GLuint MaxFragmentProgramAluInstructions;
1772    GLuint MaxFragmentProgramTexInstructions;
1773    GLuint MaxFragmentProgramTexIndirections;
1774    /* vertex or fragment program */
1775    GLuint MaxProgramMatrices;
1776    GLuint MaxProgramMatrixStackDepth;
1777    /* vertex array / buffer object bounds checking */
1778    GLboolean CheckArrayBounds;
1779 };
1780
1781
1782 /**
1783  * List of extensions.
1784  */
1785 struct gl_extensions
1786 {
1787    /**
1788     * \name Flags to quickly test if certain extensions are available.
1789     *
1790     * Not every extension needs to have such a flag, but it's encouraged.
1791     */
1792    /*@{*/
1793    GLboolean dummy;  /* don't remove this! */
1794    GLboolean ARB_depth_texture;
1795    GLboolean ARB_fragment_program;
1796    GLboolean ARB_imaging;
1797    GLboolean ARB_multisample;
1798    GLboolean ARB_multitexture;
1799    GLboolean ARB_occlusion_query;
1800    GLboolean ARB_point_sprite;
1801    GLboolean ARB_shadow;
1802    GLboolean ARB_texture_border_clamp;
1803    GLboolean ARB_texture_compression;
1804    GLboolean ARB_texture_cube_map;
1805    GLboolean ARB_texture_env_combine;
1806    GLboolean ARB_texture_env_crossbar;
1807    GLboolean ARB_texture_env_dot3;
1808    GLboolean ARB_texture_mirrored_repeat;
1809    GLboolean ARB_texture_non_power_of_two;
1810    GLboolean ARB_vertex_buffer_object;
1811    GLboolean ARB_vertex_program;
1812    GLboolean ARB_window_pos;
1813    GLboolean ATI_texture_mirror_once;
1814    GLboolean ATI_texture_env_combine3;
1815    GLboolean EXT_blend_color;
1816    GLboolean EXT_blend_equation_separate;
1817    GLboolean EXT_blend_func_separate;
1818    GLboolean EXT_blend_logic_op;
1819    GLboolean EXT_blend_minmax;
1820    GLboolean EXT_blend_subtract;
1821    GLboolean EXT_convolution;
1822    GLboolean EXT_compiled_vertex_array;
1823    GLboolean EXT_depth_bounds_test;
1824    GLboolean EXT_fog_coord;
1825    GLboolean EXT_histogram;
1826    GLboolean EXT_multi_draw_arrays;
1827    GLboolean EXT_paletted_texture;
1828    GLboolean EXT_point_parameters;
1829    GLboolean EXT_shadow_funcs;
1830    GLboolean EXT_secondary_color;
1831    GLboolean EXT_shared_texture_palette;
1832    GLboolean EXT_stencil_wrap;
1833    GLboolean EXT_stencil_two_side;
1834    GLboolean EXT_texture3D;
1835    GLboolean EXT_texture_compression_s3tc;
1836    GLboolean EXT_texture_env_add;
1837    GLboolean EXT_texture_env_combine;
1838    GLboolean EXT_texture_env_dot3;
1839    GLboolean EXT_texture_filter_anisotropic;
1840    GLboolean EXT_texture_lod_bias;
1841    GLboolean EXT_texture_mirror_clamp;
1842    GLboolean EXT_vertex_array_set;
1843    GLboolean HP_occlusion_test;
1844    GLboolean IBM_rasterpos_clip;
1845    GLboolean IBM_multimode_draw_arrays;
1846    GLboolean MESA_pack_invert;
1847    GLboolean MESA_packed_depth_stencil;
1848    GLboolean MESA_program_debug;
1849    GLboolean MESA_resize_buffers;
1850    GLboolean MESA_ycbcr_texture;
1851    GLboolean NV_blend_square;
1852    GLboolean NV_fragment_program;
1853    GLboolean NV_point_sprite;
1854    GLboolean NV_texture_rectangle;
1855    GLboolean NV_vertex_program;
1856    GLboolean NV_vertex_program1_1;
1857    GLboolean SGI_color_matrix;
1858    GLboolean SGI_color_table;
1859    GLboolean SGI_texture_color_table;
1860    GLboolean SGIS_generate_mipmap;
1861    GLboolean SGIS_pixel_texture;
1862    GLboolean SGIS_texture_edge_clamp;
1863    GLboolean SGIX_depth_texture;
1864    GLboolean SGIX_pixel_texture;
1865    GLboolean SGIX_shadow;
1866    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
1867    GLboolean TDFX_texture_compression_FXT1;
1868    GLboolean APPLE_client_storage;
1869    GLboolean S3_s3tc;
1870    /*@}*/
1871    /* The extension string */
1872    const GLubyte *String;
1873 };
1874
1875
1876 /**
1877  * A stack of matrices (projection, modelview, color, texture, etc).
1878  */
1879 struct matrix_stack
1880 {
1881    GLmatrix *Top;      /**< points into Stack */
1882    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
1883    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
1884    GLuint MaxDepth;    /**< size of Stack[] array */
1885    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
1886 };
1887
1888
1889 /**
1890  * \name Bits for image transfer operations
1891  *
1892  * \sa __GLcontextRec::ImageTransferState.
1893  */
1894 /*@{*/
1895 #define IMAGE_SCALE_BIAS_BIT                      0x1
1896 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
1897 #define IMAGE_MAP_COLOR_BIT                       0x4
1898 #define IMAGE_COLOR_TABLE_BIT                     0x8
1899 #define IMAGE_CONVOLUTION_BIT                     0x10
1900 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
1901 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
1902 #define IMAGE_COLOR_MATRIX_BIT                    0x80
1903 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
1904 #define IMAGE_HISTOGRAM_BIT                       0x200
1905 #define IMAGE_MIN_MAX_BIT                         0x400
1906
1907 /** Transfer ops up to convolution */
1908 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
1909                                     IMAGE_SHIFT_OFFSET_BIT |   \
1910                                     IMAGE_MAP_COLOR_BIT |      \
1911                                     IMAGE_COLOR_TABLE_BIT)
1912
1913 /** Transfer ops after convolution */
1914 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
1915                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
1916                                      IMAGE_COLOR_MATRIX_BIT |                 \
1917                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
1918                                      IMAGE_HISTOGRAM_BIT |                    \
1919                                      IMAGE_MIN_MAX_BIT)
1920 /*@}*/
1921
1922
1923 /**
1924  * \name Bits to indicate what state has changed.
1925  *
1926  * 4 unused flags.
1927  */
1928 /*@{*/
1929 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
1930 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
1931 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
1932 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
1933 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
1934 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
1935 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
1936 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
1937 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
1938 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
1939 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
1940 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
1941 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
1942 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
1943 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
1944 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
1945 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
1946 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
1947 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
1948 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
1949 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
1950 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
1951 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
1952 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
1953 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
1954 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
1955 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
1956 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
1957 #define _NEW_ALL ~0
1958 /*@}*/
1959
1960
1961 /**
1962  * \name Bits to track array state changes
1963  *
1964  * Also used to summarize array enabled.
1965  */
1966 /*@{*/
1967 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
1968 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
1969 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
1970 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
1971 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
1972 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
1973 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
1974 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
1975 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
1976 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
1977 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
1978 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
1979 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
1980 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
1981 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
1982 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
1983 #define _NEW_ARRAY_ATTRIB_0         0x10000  /* start at bit 16 */
1984 #define _NEW_ARRAY_ALL              0xffffffff
1985
1986
1987 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
1988 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
1989 /*@}*/
1990
1991
1992 /**
1993  * \name A bunch of flags that we think might be useful to drivers.
1994  *
1995  * Set in the __GLcontextRec::_TriangleCaps bitfield.
1996  */
1997 /*@{*/
1998 #define DD_FLATSHADE                0x1
1999 #define DD_SEPARATE_SPECULAR        0x2
2000 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2001 #define DD_TRI_LIGHT_TWOSIDE        0x8
2002 #define DD_TRI_UNFILLED             0x10
2003 #define DD_TRI_SMOOTH               0x20
2004 #define DD_TRI_STIPPLE              0x40
2005 #define DD_TRI_OFFSET               0x80
2006 #define DD_LINE_SMOOTH              0x100
2007 #define DD_LINE_STIPPLE             0x200
2008 #define DD_LINE_WIDTH               0x400
2009 #define DD_POINT_SMOOTH             0x800
2010 #define DD_POINT_SIZE               0x1000
2011 #define DD_POINT_ATTEN              0x2000
2012 /*@}*/
2013
2014
2015 /**
2016  * \name Define the state changes under which each of these bits might change
2017  */
2018 /*@{*/
2019 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2020 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2021 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2022 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2023 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2024 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2025 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2026 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2027 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2028 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2029 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2030 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2031 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2032 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2033 /*@}*/
2034
2035
2036 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2037                                            _NEW_TEXTURE |       \
2038                                            _NEW_POINT |         \
2039                                            _NEW_MODELVIEW)
2040
2041 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2042                                            _NEW_TEXTURE)
2043
2044 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2045
2046
2047
2048
2049 /*
2050  * Forward declaration of display list data types:
2051  */
2052 union node;
2053 typedef union node Node;
2054
2055
2056 /* This has to be included here. */
2057 #include "dd.h"
2058
2059
2060 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2061
2062 /**
2063  * Core Mesa's support for tnl modules:
2064  */
2065 struct gl_tnl_module {
2066    /**
2067     * Vertex format to be lazily swapped into current dispatch.
2068     */
2069    GLvertexformat *Current;
2070
2071    /**
2072     * \name Record of functions swapped out.
2073     * On restore, only need to swap these functions back in.
2074     */
2075    /*@{*/
2076    void *Swapped[NUM_VERTEX_FORMAT_ENTRIES][2];
2077    GLuint SwapCount;
2078    /*@}*/
2079 };
2080
2081 struct mesa_list_state {
2082    GLuint CallDepth;            /**< Current recursion calling depth */
2083    Node *CurrentListPtr;        /**< Head of list being compiled */
2084    GLuint CurrentListNum;       /**< Number of the list being compiled */
2085    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2086    GLuint CurrentPos;           /**< Index into current block of nodes */
2087    GLvertexformat ListVtxfmt;
2088
2089    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2090    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2091
2092    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2093    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2094
2095    GLubyte ActiveIndex;
2096    GLfloat CurrentIndex;
2097
2098    GLubyte ActiveEdgeFlag;
2099    GLboolean CurrentEdgeFlag;
2100 };
2101
2102
2103 /**
2104  * Mesa context
2105  *
2106  * This is the central context data structure for Mesa.  Almost all
2107  * OpenGL state is contained in this structure.
2108  * Think of this as a base class from which device drivers will derive
2109  * sub classes.
2110  */
2111 struct __GLcontextRec {
2112    /**
2113     * \name OS related interfaces.
2114     *
2115     * These \b must be the first members of this structure, because they are
2116     * exposed to the outside world (i.e. GLX extension).
2117     */
2118    /*@{*/
2119    __GLimports imports;
2120    __GLexports exports;
2121    /*@}*/
2122
2123    /** State possibly shared with other contexts in the address space */
2124    struct gl_shared_state *Shared;
2125
2126    /** \name API function pointer tables */
2127    /*@{*/
2128    struct _glapi_table *Save;   /**< Display list save functions */
2129    struct _glapi_table *Exec;   /**< Execute functions */
2130    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2131    /*@}*/
2132
2133    GLvisual Visual;
2134    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2135    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2136
2137    /**
2138     * Device driver function pointer table
2139     */
2140    struct dd_function_table Driver;
2141
2142    void *DriverCtx;     /**< Points to device driver context/state */
2143    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2144
2145    /** Core/Driver constants */
2146    struct gl_constants Const;
2147
2148    /** \name The various 4x4 matrix stacks */
2149    /*@{*/
2150    struct matrix_stack ModelviewMatrixStack;
2151    struct matrix_stack ProjectionMatrixStack;
2152    struct matrix_stack ColorMatrixStack;
2153    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2154    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2155    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2156    /*@}*/
2157
2158    /** Combined modelview and projection matrix */
2159    GLmatrix _ModelProjectMatrix;
2160
2161    /** \name Display lists */
2162    struct mesa_list_state ListState;
2163
2164    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2165    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2166
2167    /** Extensions */
2168    struct gl_extensions Extensions;
2169
2170    /** \name Renderer attribute stack */
2171    /*@{*/
2172    GLuint AttribStackDepth;
2173    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2174    /*@}*/
2175
2176    /** \name Renderer attribute groups
2177     *
2178     * We define a struct for each attribute group to make pushing and popping
2179     * attributes easy.  Also it's a good organization.
2180     */
2181    /*@{*/
2182    struct gl_accum_attrib       Accum;          /**< Accumulation buffer attributes */
2183    struct gl_colorbuffer_attrib Color;          /**< Color buffers attributes */
2184    struct gl_current_attrib     Current;        /**< Current attributes */
2185    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2186    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2187    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2188    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2189    struct gl_light_attrib       Light;          /**< Light attributes */
2190    struct gl_line_attrib        Line;           /**< Line attributes */
2191    struct gl_list_attrib        List;           /**< List attributes */
2192    struct gl_multisample_attrib Multisample;
2193    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2194    struct gl_point_attrib       Point;          /**< Point attributes */
2195    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2196    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2197    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2198    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2199    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2200    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2201    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2202    /*@}*/
2203
2204    /** \name Other attribute groups */
2205    /*@{*/
2206    struct gl_histogram_attrib   Histogram;
2207    struct gl_minmax_attrib      MinMax;
2208    struct gl_convolution_attrib Convolution1D;
2209    struct gl_convolution_attrib Convolution2D;
2210    struct gl_convolution_attrib Separable2D;
2211    /*@}*/
2212
2213    /** \name Client attribute stack */
2214    /*@{*/
2215    GLuint ClientAttribStackDepth;
2216    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2217    /*@}*/
2218
2219    /** \name Client attribute groups */
2220    /*@{*/
2221    struct gl_array_attrib       Array;  /**< Vertex arrays */
2222    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2223    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2224
2225    struct gl_evaluators EvalMap;   /**< All evaluators */
2226    struct gl_feedback   Feedback;  /**< Feedback */
2227    struct gl_selection  Select;    /**< Selection */
2228
2229    struct gl_color_table ColorTable;       /**< Pre-convolution */
2230    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2231    struct gl_color_table PostConvolutionColorTable;
2232    struct gl_color_table ProxyPostConvolutionColorTable;
2233    struct gl_color_table PostColorMatrixColorTable;
2234    struct gl_color_table ProxyPostColorMatrixColorTable;
2235
2236    struct program_state Program;             /**< for vertex or fragment progs */
2237    struct vertex_program_state VertexProgram;      /**< GL_NV_vertex_program */
2238    struct fragment_program_state FragmentProgram;  /**< GL_NV_fragment_program */
2239
2240    struct occlusion_state Occlusion;  /**< GL_ARB_occlusion_query */
2241
2242    GLenum ErrorValue;        /**< Last error code */
2243    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2244    GLuint NewState;          /**< bitwise-or of _NEW_* flags */
2245    /*@}*/
2246
2247    /** \name Derived */
2248    /*@{*/
2249    GLuint _TriangleCaps;      /**< bitwise-or of DD_* flags */
2250    GLuint _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2251    GLfloat _EyeZDir[3];
2252    GLfloat _ModelViewInvScale;
2253    GLuint _NeedEyeCoords;
2254    GLuint _ForceEyeCoords;
2255    GLboolean _RotateMode;
2256    GLenum _CurrentProgram;    /* currently executing program */
2257
2258    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2259    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2260    /**@}*/
2261
2262    struct gl_list_extensions listext; /**< driver dlist extensions */
2263
2264
2265    GLboolean OcclusionResult;       /**< for GL_HP_occlusion_test */
2266    GLboolean OcclusionResultSaved;  /**< for GL_HP_occlusion_test */
2267    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2268                     *
2269                     * We don't have a better way to communicate this value from
2270                     * swrast_setup to swrast. */
2271
2272
2273    /** \name Z buffer stuff */
2274    /*@{*/
2275    GLuint DepthMax;     /**< Max depth buffer value */
2276    GLfloat DepthMaxF;   /**< Float max depth buffer value */
2277    GLfloat MRD;         /**< minimum resolvable difference in Z values */
2278    /*@}*/
2279
2280    /** Should 3Dfx Glide driver catch signals? */
2281    GLboolean CatchSignals;
2282
2283    /** \name For debugging/development only */
2284    /*@{*/
2285    GLboolean FirstTimeCurrent;
2286    /*@}*/
2287
2288    /** Dither disable via MESA_NO_DITHER env var */
2289    GLboolean NoDither;
2290
2291    /** Core tnl module support */
2292    struct gl_tnl_module TnlModule;
2293
2294    /**
2295     * \name Hooks for module contexts.
2296     *
2297     * These will eventually live in the driver or elsewhere.
2298     */
2299    /*@{*/
2300    void *swrast_context;
2301    void *swsetup_context;
2302    void *swtnl_context;
2303    void *swtnl_im;
2304    void *acache_context;
2305    void *aelt_context;
2306    /*@}*/
2307 };
2308
2309
2310 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2311 extern const char *_mesa_prim_name[GL_POLYGON+4];
2312
2313
2314 #ifdef MESA_DEBUG
2315 extern int MESA_VERBOSE;
2316 extern int MESA_DEBUG_FLAGS;
2317 # define MESA_FUNCTION __FUNCTION__
2318 #else
2319 # define MESA_VERBOSE 0
2320 # define MESA_DEBUG_FLAGS 0
2321 # define MESA_FUNCTION "a function"
2322 # ifndef NDEBUG
2323 #  define NDEBUG
2324 # endif
2325 #endif
2326
2327
2328 enum _verbose {
2329    VERBOSE_VARRAY               = 0x0001,
2330    VERBOSE_TEXTURE              = 0x0002,
2331    VERBOSE_IMMEDIATE            = 0x0004,
2332    VERBOSE_PIPELINE             = 0x0008,
2333    VERBOSE_DRIVER               = 0x0010,
2334    VERBOSE_STATE                = 0x0020,
2335    VERBOSE_API                  = 0x0040,
2336    VERBOSE_DISPLAY_LIST         = 0x0100,
2337    VERBOSE_LIGHTING             = 0x0200,
2338    VERBOSE_PRIMS                = 0x0400,
2339    VERBOSE_VERTS                = 0x0800
2340 };
2341
2342
2343 enum _debug {
2344    DEBUG_ALWAYS_FLUSH           = 0x1
2345 };
2346
2347
2348
2349 #define Elements(x) sizeof(x)/sizeof(*(x))
2350
2351
2352 #endif /* TYPES_H */