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:  5.1
  11  *
  12  * Copyright (C) 1999-2003  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
 201 /**
 202  * Maximum number of temporary vertices required for clipping.
 203  *
 204  * Used in array_cache and tnl modules.
 205  */
 206 #define MAX_CLIPPED_VERTICES ((2 * (6 + MAX_CLIP_PLANES))+1)
 207
 208
 209 /**
 210  * Data structure for color tables
 211  */
 212 struct gl_color_table {
 213    GLenum Format;         /**< GL_ALPHA, GL_RGB, GL_RGB, etc */
 214    GLenum IntFormat;
 215    GLuint Size;           /**< number of entries (rows) in table */
 216    GLvoid *Table;         /**< either GLfloat * or GLchan * */
 217    GLboolean FloatTable;  /**< are entries stored as floats? */
 218    GLubyte RedSize;
 219    GLubyte GreenSize;
 220    GLubyte BlueSize;
 221    GLubyte AlphaSize;
 222    GLubyte LuminanceSize;
 223    GLubyte IntensitySize;
 224 };
 225
 226
 227 /**
 228  * \name Bit flags used for updating material values.
 229  */
 230 /*@{*/
 231 #define MAT_ATTRIB_FRONT_AMBIENT           0
 232 #define MAT_ATTRIB_BACK_AMBIENT            1
 233 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 234 #define MAT_ATTRIB_BACK_DIFFUSE            3
 235 #define MAT_ATTRIB_FRONT_SPECULAR          4
 236 #define MAT_ATTRIB_BACK_SPECULAR           5
 237 #define MAT_ATTRIB_FRONT_EMISSION          6
 238 #define MAT_ATTRIB_BACK_EMISSION           7
 239 #define MAT_ATTRIB_FRONT_SHININESS         8
 240 #define MAT_ATTRIB_BACK_SHININESS          9
 241 #define MAT_ATTRIB_FRONT_INDEXES           10
 242 #define MAT_ATTRIB_BACK_INDEXES            11
 243 #define MAT_ATTRIB_MAX                     12
 244
 245 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 246 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 247 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 248 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 249 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 250 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 251
 252 #define MAT_INDEX_AMBIENT  0
 253 #define MAT_INDEX_DIFFUSE  1
 254 #define MAT_INDEX_SPECULAR 2
 255
 256 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 257 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 258 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 259 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 260 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 261 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 262 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 263 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 264 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 265 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 266 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 267 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 268
 269
 270 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 271                                  MAT_BIT_FRONT_AMBIENT |        \
 272                                  MAT_BIT_FRONT_DIFFUSE |        \
 273                                  MAT_BIT_FRONT_SPECULAR |       \
 274                                  MAT_BIT_FRONT_SHININESS |      \
 275                                  MAT_BIT_FRONT_INDEXES)
 276
 277 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 278                                  MAT_BIT_BACK_AMBIENT |         \
 279                                  MAT_BIT_BACK_DIFFUSE |         \
 280                                  MAT_BIT_BACK_SPECULAR |        \
 281                                  MAT_BIT_BACK_SHININESS |       \
 282                                  MAT_BIT_BACK_INDEXES)
 283
 284 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 285 /*@}*/
 286
 287
 288 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 289 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 290
 291 /**
 292  * Material shininess lookup table.
 293  */
 294 struct gl_shine_tab {
 295    struct gl_shine_tab *next, *prev;
 296    GLfloat tab[SHINE_TABLE_SIZE+1];
 297    GLfloat shininess;
 298    GLuint refcount;
 299 };
 300
 301
 302 /**
 303  * Light.
 304  */
 305 struct gl_light {
 306    struct gl_light *next;       /**< double linked list with sentinel */
 307    struct gl_light *prev;
 308
 309    GLfloat Ambient[4];          /**< ambient color */
 310    GLfloat Diffuse[4];          /**< diffuse color */
 311    GLfloat Specular[4];         /**< specular color */
 312    GLfloat EyePosition[4];      /**< position in eye coordinates */
 313    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 314    GLfloat SpotExponent;
 315    GLfloat SpotCutoff;          /**< in degrees */
 316    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 317    GLfloat ConstantAttenuation;
 318    GLfloat LinearAttenuation;
 319    GLfloat QuadraticAttenuation;
 320    GLboolean Enabled;           /**< On/off flag */
 321
 322    /**
 323     * \name Derived fields
 324     */
 325    /*@{*/
 326    GLuint _Flags;               /**< State */
 327
 328    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 329    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 330    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 331    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 332    GLfloat _VP_inf_spot_attenuation;
 333
 334    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 335    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 336    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 337    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 338    GLfloat _dli;                /**< CI diffuse light intensity */
 339    GLfloat _sli;                /**< CI specular light intensity */
 340    /*@}*/
 341 };
 342
 343
 344 /**
 345  * Light model.
 346  */
 347 struct gl_lightmodel {
 348    GLfloat Ambient[4];          /**< ambient color */
 349    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 350    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 351    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 352                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 353 };
 354
 355
 356 /**
 357  * Material.
 358  */
 359 struct gl_material
 360 {
 361    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 362 };
 363
 364
 365 /**
 366  * Accumulation buffer attributes.
 367  */
 368 struct gl_accum_attrib {
 369    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 370 };
 371
 372
 373 /**
 374  * \name Clipping planes bits
 375  *
 376  * Used in gl_colorbuffer_attrib::_DrawDestMask and
 377  * gl_colorbuffer_attrib::_ReadSrcMask below to identify color buffers.
 378  */
 379 /*@{*/
 380 #define FRONT_LEFT_BIT  0x1
 381 #define FRONT_RIGHT_BIT 0x2
 382 #define BACK_LEFT_BIT   0x4
 383 #define BACK_RIGHT_BIT  0x8
 384 #define AUX0_BIT        0x10
 385 #define AUX1_BIT        0x20
 386 #define AUX2_BIT        0x40
 387 #define AUX3_BIT        0x80
 388 /*@}*/
 389
 390
 391 /**
 392  * Color buffers attributes.
 393  */
 394 struct gl_colorbuffer_attrib {
 395    GLuint ClearIndex;                   /**< Index to use for glClear */
 396    GLclampf ClearColor[4];              /**< Color to use for glClear */
 397
 398    GLuint IndexMask;                    /**< Color index write mask */
 399    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 400
 401    GLenum DrawBuffer;                   /**< Which buffer to draw into */
 402    GLubyte _DrawDestMask;               /**< bitwise-OR of FRONT/BACK_LEFT/RIGHT_BITs */
 403
 404    /**
 405     * \name alpha testing
 406     */
 407    /*@{*/
 408    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 409    GLenum AlphaFunc;                    /**< Alpha test function */
 410    GLclampf AlphaRef;                   /**< Alpha reference value */
 411    /*@}*/
 412
 413    /**
 414     * \name Blending
 415     */
 416    /*@{*/
 417    GLboolean BlendEnabled;              /**< Blending enabled flag */
 418    GLenum BlendSrcRGB;                  /**< Blending source operator */
 419    GLenum BlendDstRGB;                  /**< Blending destination operator */
 420    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 421    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 422    GLenum BlendEquation;                /**< Blending equation */
 423    GLfloat BlendColor[4];               /**< Blending color */
 424    /*@}*/
 425
 426    /**
 427     * \name Logic op
 428     */
 429    /*@{*/
 430    GLenum LogicOp;                      /**< Logic operator */
 431    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 432    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 433    /*@}*/
 434
 435    GLboolean DitherFlag;                /**< Dither enable flag */
 436 };
 437
 438
 439 /**
 440  * Current attributes.
 441  */
 442 struct gl_current_attrib {
 443    /**
 444     * \name Values valid only when FLUSH_VERTICES has been called.
 445     */
 446    /*@{*/
 447    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 448                                                   *  indexed by VERT_ATTRIB_* */
 449    GLuint Index;                                /**< Current color index */
 450    GLboolean EdgeFlag;                          /**< Current edge flag */
 451    /*@}*/
 452
 453    /**
 454     * \name Values are always valid.
 455     *
 456     * \note BTW, note how similar this set of attributes is to the SWvertex data type
 457     * in the software rasterizer...
 458     */
 459    /*@{*/
 460    GLfloat RasterPos[4];                        /**< Current raster position */
 461    GLfloat RasterDistance;                      /**< Current raster distance */
 462    GLfloat RasterColor[4];                      /**< Current raster color */
 463    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 464    GLuint RasterIndex;                          /**< Current raster index */
 465    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 466    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 467    /*@}*/
 468 };
 469
 470
 471 /**
 472  * Depth buffer attributes.
 473  */
 474 struct gl_depthbuffer_attrib {
 475    GLenum Func;                 /**< Function for depth buffer compare */
 476    GLclampd Clear;              /**< Value to clear depth buffer to */
 477    GLboolean Test;              /**< Depth buffering enabled flag */
 478    GLboolean Mask;              /**< Depth buffer writable? */
 479    GLboolean OcclusionTest;     /**< GL_HP_occlusion_test */
 480    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 481    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 482 };
 483
 484
 485 /**
 486  * glEnable()/glDisable() attributes.
 487  */
 488 struct gl_enable_attrib {
 489    GLboolean AlphaTest;
 490    GLboolean AutoNormal;
 491    GLboolean Blend;
 492    GLuint ClipPlanes;
 493    GLboolean ColorMaterial;
 494    GLboolean ColorTable;                /* SGI_color_table */
 495    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 496    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 497    GLboolean Convolution1D;
 498    GLboolean Convolution2D;
 499    GLboolean Separable2D;
 500    GLboolean CullFace;
 501    GLboolean DepthTest;
 502    GLboolean Dither;
 503    GLboolean Fog;
 504    GLboolean Histogram;
 505    GLboolean Light[MAX_LIGHTS];
 506    GLboolean Lighting;
 507    GLboolean LineSmooth;
 508    GLboolean LineStipple;
 509    GLboolean IndexLogicOp;
 510    GLboolean ColorLogicOp;
 511    GLboolean Map1Color4;
 512    GLboolean Map1Index;
 513    GLboolean Map1Normal;
 514    GLboolean Map1TextureCoord1;
 515    GLboolean Map1TextureCoord2;
 516    GLboolean Map1TextureCoord3;
 517    GLboolean Map1TextureCoord4;
 518    GLboolean Map1Vertex3;
 519    GLboolean Map1Vertex4;
 520    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 521    GLboolean Map2Color4;
 522    GLboolean Map2Index;
 523    GLboolean Map2Normal;
 524    GLboolean Map2TextureCoord1;
 525    GLboolean Map2TextureCoord2;
 526    GLboolean Map2TextureCoord3;
 527    GLboolean Map2TextureCoord4;
 528    GLboolean Map2Vertex3;
 529    GLboolean Map2Vertex4;
 530    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 531    GLboolean MinMax;
 532    GLboolean Normalize;
 533    GLboolean PixelTexture;
 534    GLboolean PointSmooth;
 535    GLboolean PolygonOffsetPoint;
 536    GLboolean PolygonOffsetLine;
 537    GLboolean PolygonOffsetFill;
 538    GLboolean PolygonSmooth;
 539    GLboolean PolygonStipple;
 540    GLboolean RescaleNormals;
 541    GLboolean Scissor;
 542    GLboolean Stencil;
 543    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 544    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 545    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 546    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 547    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 548    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 549    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 550    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 551    /* SGI_texture_color_table */
 552    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 553    /* GL_NV_vertex_program */
 554    GLboolean VertexProgram;
 555    GLboolean VertexProgramPointSize;
 556    GLboolean VertexProgramTwoSide;
 557    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 558    GLboolean PointSprite;
 559 };
 560
 561
 562 /**
 563  * Eval attributes.
 564  */
 565 struct gl_eval_attrib {
 566    /**
 567     * \name Enable bits
 568     */
 569    /*@{*/
 570    GLboolean Map1Color4;
 571    GLboolean Map1Index;
 572    GLboolean Map1Normal;
 573    GLboolean Map1TextureCoord1;
 574    GLboolean Map1TextureCoord2;
 575    GLboolean Map1TextureCoord3;
 576    GLboolean Map1TextureCoord4;
 577    GLboolean Map1Vertex3;
 578    GLboolean Map1Vertex4;
 579    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 580    GLboolean Map2Color4;
 581    GLboolean Map2Index;
 582    GLboolean Map2Normal;
 583    GLboolean Map2TextureCoord1;
 584    GLboolean Map2TextureCoord2;
 585    GLboolean Map2TextureCoord3;
 586    GLboolean Map2TextureCoord4;
 587    GLboolean Map2Vertex3;
 588    GLboolean Map2Vertex4;
 589    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 590    GLboolean AutoNormal;
 591    /*@}*/
 592
 593    /**
 594     * \name Map Grid endpoints and divisions and calculated du values
 595     */
 596    /*@{*/
 597    GLint MapGrid1un;
 598    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 599    GLint MapGrid2un, MapGrid2vn;
 600    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 601    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 602    /*@}*/
 603 };
 604
 605
 606 /**
 607  * Fog attributes.
 608  */
 609 struct gl_fog_attrib {
 610    GLboolean Enabled;           /**< Fog enabled flag */
 611    GLfloat Color[4];            /**< Fog color */
 612    GLfloat Density;             /**< Density >= 0.0 */
 613    GLfloat Start;               /**< Start distance in eye coords */
 614    GLfloat End;                 /**< End distance in eye coords */
 615    GLfloat Index;               /**< Fog index */
 616    GLenum Mode;                 /**< Fog mode */
 617    GLboolean ColorSumEnabled;
 618    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 619 };
 620
 621
 622 /**
 623  * Hint attributes.
 624  *
 625  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 626  */
 627 struct gl_hint_attrib {
 628    GLenum PerspectiveCorrection;
 629    GLenum PointSmooth;
 630    GLenum LineSmooth;
 631    GLenum PolygonSmooth;
 632    GLenum Fog;
 633    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 634    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 635    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 636 };
 637
 638
 639 /**
 640  * Histogram attributes.
 641  */
 642 struct gl_histogram_attrib {
 643    GLuint Width;                                /**< number of table entries */
 644    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 645    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 646    GLboolean Sink;                              /**< terminate image transfer? */
 647    GLubyte RedSize;                             /**< Bits per counter */
 648    GLubyte GreenSize;
 649    GLubyte BlueSize;
 650    GLubyte AlphaSize;
 651    GLubyte LuminanceSize;
 652 };
 653
 654
 655 struct gl_minmax_attrib {
 656    GLenum Format;
 657    GLboolean Sink;
 658    GLfloat Min[4], Max[4];   /**< RGBA */
 659 };
 660
 661
 662 struct gl_convolution_attrib {
 663    GLenum Format;
 664    GLenum InternalFormat;
 665    GLuint Width;
 666    GLuint Height;
 667    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 668 };
 669
 670
 671 #define LIGHT_SPOT         0x1
 672 #define LIGHT_LOCAL_VIEWER 0x2
 673 #define LIGHT_POSITIONAL   0x4
 674 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 675
 676 /**
 677  * Lighting attributes.
 678  */
 679 struct gl_light_attrib {
 680    struct gl_light Light[MAX_LIGHTS];   /**< Array of lights */
 681    struct gl_lightmodel Model;          /**< Lighting model */
 682
 683    /**
 684     * Must flush FLUSH_VERTICES before referencing:
 685     */
 686    /*@{*/
 687    struct gl_material Material;         /**< Includes front & back values */
 688    /*@}*/
 689
 690    GLboolean Enabled;                   /**< Lighting enabled flag */
 691    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 692    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 693    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 694    GLuint ColorMaterialBitmask;         /**< bitmask formed from Face and Mode */
 695    GLboolean ColorMaterialEnabled;
 696
 697    struct gl_light EnabledList;         /**< List sentinel */
 698
 699    /**
 700     * Derived for optimizations:
 701     */
 702    /*@{*/
 703    GLboolean _NeedEyeCoords;
 704    GLboolean _NeedVertices;             /**< Use fast shader? */
 705    GLuint  _Flags;                      /**< LIGHT_* flags, see above */
 706    GLfloat _BaseColor[2][3];
 707    /*@}*/
 708 };
 709
 710
 711 /**
 712  * Line attributes.
 713  */
 714 struct gl_line_attrib {
 715    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 716    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 717    GLushort StipplePattern;     /**< Stipple pattern */
 718    GLint StippleFactor;         /**< Stipple repeat factor */
 719    GLfloat Width;               /**< Line width */
 720    GLfloat _Width;              /**< Clamped Line width */
 721 };
 722
 723
 724 struct gl_list_attrib {
 725    GLuint ListBase;
 726 };
 727
 728
 729 struct gl_list_opcode {
 730    GLuint size;
 731    void (*execute)( GLcontext *ctx, void *data );
 732    void (*destroy)( GLcontext *ctx, void *data );
 733    void (*print)( GLcontext *ctx, void *data );
 734 };
 735
 736 #define GL_MAX_EXT_OPCODES 16
 737
 738 struct gl_list_extensions {
 739    struct gl_list_opcode opcode[GL_MAX_EXT_OPCODES];
 740    GLuint nr_opcodes;
 741 };
 742
 743
 744 struct gl_multisample_attrib {
 745    GLboolean Enabled;
 746    GLboolean SampleAlphaToCoverage;
 747    GLboolean SampleAlphaToOne;
 748    GLboolean SampleCoverage;
 749    GLfloat SampleCoverageValue;
 750    GLboolean SampleCoverageInvert;
 751 };
 752
 753
 754 /**
 755  * Pixel attributes.
 756  */
 757 struct gl_pixel_attrib {
 758    GLenum ReadBuffer;           /**< source buffer for glReadPixels()/glCopyPixels() */
 759    GLubyte _ReadSrcMask;        /**< Not really a mask, but like _DrawDestMask
 760                                   *
 761                                   * May be: FRONT_LEFT_BIT, BACK_LEFT_BIT,
 762                                   * FRONT_RIGHT_BIT or BACK_RIGHT_BIT. */
 763    GLfloat RedBias, RedScale;
 764    GLfloat GreenBias, GreenScale;
 765    GLfloat BlueBias, BlueScale;
 766    GLfloat AlphaBias, AlphaScale;
 767    GLfloat DepthBias, DepthScale;
 768    GLint IndexShift, IndexOffset;
 769    GLboolean MapColorFlag;
 770    GLboolean MapStencilFlag;
 771    GLfloat ZoomX, ZoomY;
 772    /* XXX move these out of gl_pixel_attrib */
 773    GLint MapStoSsize;           /**< Size of each pixel map */
 774    GLint MapItoIsize;
 775    GLint MapItoRsize;
 776    GLint MapItoGsize;
 777    GLint MapItoBsize;
 778    GLint MapItoAsize;
 779    GLint MapRtoRsize;
 780    GLint MapGtoGsize;
 781    GLint MapBtoBsize;
 782    GLint MapAtoAsize;
 783    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 784    GLint MapItoI[MAX_PIXEL_MAP_TABLE];
 785    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 786    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 787    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 788    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 789    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 790    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 791    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 792    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 793    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 794    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 795    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 796    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 797    /** GL_EXT_histogram */
 798    GLboolean HistogramEnabled;
 799    GLboolean MinMaxEnabled;
 800    /** GL_SGIS_pixel_texture */
 801    GLboolean PixelTextureEnabled;
 802    GLenum FragmentRgbSource;
 803    GLenum FragmentAlphaSource;
 804    /** GL_SGI_color_matrix */
 805    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 806    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 807    /** GL_SGI_color_table */
 808    GLfloat ColorTableScale[4];
 809    GLfloat ColorTableBias[4];
 810    GLboolean ColorTableEnabled;
 811    GLfloat PCCTscale[4];
 812    GLfloat PCCTbias[4];
 813    GLboolean PostConvolutionColorTableEnabled;
 814    GLfloat PCMCTscale[4];
 815    GLfloat PCMCTbias[4];
 816    GLboolean PostColorMatrixColorTableEnabled;
 817    /** GL_SGI_texture_color_table */
 818    GLfloat TextureColorTableScale[4];
 819    GLfloat TextureColorTableBias[4];
 820    /** Convolution */
 821    GLboolean Convolution1DEnabled;
 822    GLboolean Convolution2DEnabled;
 823    GLboolean Separable2DEnabled;
 824    GLfloat ConvolutionBorderColor[3][4];
 825    GLenum ConvolutionBorderMode[3];
 826    GLfloat ConvolutionFilterScale[3][4];
 827    GLfloat ConvolutionFilterBias[3][4];
 828    GLfloat PostConvolutionScale[4];  /**< RGBA */
 829    GLfloat PostConvolutionBias[4];   /**< RGBA */
 830 };
 831
 832
 833 /**
 834  * Point attributes.
 835  */
 836 struct gl_point_attrib {
 837    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 838    GLfloat Size;                /**< User-specified point size */
 839    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
 840    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 841    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 842    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 843    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 844    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
 845    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV_point_sprite / GL_NV_point_sprite */
 846    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 847 };
 848
 849
 850 /**
 851  * Polygon attributes.
 852  */
 853 struct gl_polygon_attrib {
 854    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
 855    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
 856    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
 857    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
 858    GLboolean CullFlag;          /**< Culling on/off flag */
 859    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
 860    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
 861    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
 862    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
 863    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
 864    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
 865    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
 866    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
 867 };
 868
 869
 870 /**
 871  * Scissor attributes.
 872  */
 873 struct gl_scissor_attrib {
 874    GLboolean Enabled;           /**< Scissor test enabled? */
 875    GLint X, Y;                  /**< Lower left corner of box */
 876    GLsizei Width, Height;       /**< Size of box */
 877 };
 878
 879
 880 /**
 881  * Stencil attributes.
 882  */
 883 struct gl_stencil_attrib {
 884    GLboolean Enabled;           /**< Enabled flag */
 885    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
 886    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
 887    GLenum Function[2];          /**< Stencil function */
 888    GLenum FailFunc[2];          /**< Fail function */
 889    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
 890    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
 891    GLstencil Ref[2];            /**< Reference value */
 892    GLstencil ValueMask[2];      /**< Value mask */
 893    GLstencil WriteMask[2];      /**< Write mask */
 894    GLstencil Clear;             /**< Clear value */
 895 };
 896
 897
 898 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
 899
 900 #define TEXTURE_1D_INDEX    0
 901 #define TEXTURE_2D_INDEX    1
 902 #define TEXTURE_3D_INDEX    2
 903 #define TEXTURE_CUBE_INDEX  3
 904 #define TEXTURE_RECT_INDEX  4
 905
 906 /* Texture.Unit[]._ReallyEnabled flags: */
 907 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
 908 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
 909 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
 910 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
 911 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
 912
 913
 914 /* TexGenEnabled flags */
 915 #define S_BIT 1
 916 #define T_BIT 2
 917 #define R_BIT 4
 918 #define Q_BIT 8
 919
 920 /* Bitmap versions of the GL_ constants. */
 921 #define TEXGEN_SPHERE_MAP        0x1
 922 #define TEXGEN_OBJ_LINEAR        0x2
 923 #define TEXGEN_EYE_LINEAR        0x4
 924 #define TEXGEN_REFLECTION_MAP_NV 0x8
 925 #define TEXGEN_NORMAL_MAP_NV     0x10
 926
 927 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
 928                                   TEXGEN_REFLECTION_MAP_NV | \
 929                                   TEXGEN_NORMAL_MAP_NV)
 930 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
 931                                   TEXGEN_REFLECTION_MAP_NV | \
 932                                   TEXGEN_NORMAL_MAP_NV     | \
 933                                   TEXGEN_EYE_LINEAR)
 934
 935 /* A selection of state flags to make driver and module's lives easier. */
 936 #define ENABLE_TEXGEN0        0x1
 937 #define ENABLE_TEXGEN1        0x2
 938 #define ENABLE_TEXGEN2        0x4
 939 #define ENABLE_TEXGEN3        0x8
 940 #define ENABLE_TEXGEN4        0x10
 941 #define ENABLE_TEXGEN5        0x20
 942 #define ENABLE_TEXGEN6        0x40
 943 #define ENABLE_TEXGEN7        0x80
 944
 945 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
 946 #define ENABLE_TEXMAT1        0x2
 947 #define ENABLE_TEXMAT2        0x4
 948 #define ENABLE_TEXMAT3        0x8
 949 #define ENABLE_TEXMAT4        0x10
 950 #define ENABLE_TEXMAT5        0x20
 951 #define ENABLE_TEXMAT6        0x40
 952 #define ENABLE_TEXMAT7        0x80
 953
 954 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
 955 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
 956
 957 /**
 958  * Texel fetch function prototype.
 959  *
 960  * \param texImage texture image.
 961  * \param col texel column.
 962  * \param row texel row.
 963  * \param img texel level.
 964  * \param texelOut output texel. If \p texImage is color-index, \p texelOut
 965  * returns <tt>GLchan[1]</tt>.  If \p texImage is depth, \p texelOut returns
 966  * <tt>GLfloat[1]</tt>.  Otherwise, \p texelOut returns <tt>GLchan[4]</tt>.
 967  */
 968 typedef void (*FetchTexelFunc)( const struct gl_texture_image *texImage,
 969                                 GLint col, GLint row, GLint img,
 970                                 GLvoid *texelOut );
 971
 972 /**
 973  * Texture format record
 974  */
 975 struct gl_texture_format {
 976    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
 977
 978    GLenum BaseFormat;           /**< Either GL_ALPHA, GL_INTENSITY, GL_LUMINANCE,
 979                                  *   GL_LUMINANCE_ALPHA, GL_RGB, GL_RGBA,
 980                                  *   GL_COLOR_INDEX or GL_DEPTH_COMPONENT.
 981                                  */
 982    GLubyte RedBits;             /**< Bits per texel component */
 983    GLubyte GreenBits;           /**< These are just rough approximations for */
 984    GLubyte BlueBits;            /**< compressed texture formats. */
 985    GLubyte AlphaBits;
 986    GLubyte LuminanceBits;
 987    GLubyte IntensityBits;
 988    GLubyte IndexBits;
 989    GLubyte DepthBits;
 990
 991    GLint TexelBytes;            /**< Bytes per texel (0 for compressed formats */
 992
 993    /**
 994     * \name Texel fetch function pointers
 995     */
 996    /*@{*/
 997    FetchTexelFunc FetchTexel1D;
 998    FetchTexelFunc FetchTexel2D;
 999    FetchTexelFunc FetchTexel3D;
1000    /*@}*/
1001 };
1002
1003
1004 /**
1005  * Texture image record
1006  */
1007 struct gl_texture_image {
1008    GLenum Format;               /**< GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1009                                  *    GL_INTENSITY, GL_RGB, GL_RGBA,
1010                                  *    GL_COLOR_INDEX or GL_DEPTH_COMPONENT only.
1011                                  *    Used for choosing TexEnv arithmetic.
1012                                  */
1013    GLint IntFormat;             /**< Internal format as given by the user */
1014    GLuint Border;               /**< 0 or 1 */
1015    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1016    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1017    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1018    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1019    GLuint Width2;               /**< = Width - 2*Border */
1020    GLuint Height2;              /**< = Height - 2*Border */
1021    GLuint Depth2;               /**< = Depth - 2*Border */
1022    GLuint WidthLog2;            /**< = log2(Width2) */
1023    GLuint HeightLog2;           /**< = log2(Height2) */
1024    GLuint DepthLog2;            /**< = log2(Depth2) */
1025    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1026    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1027    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1028    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1029    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1030    GLboolean IsClientData;      /**< Data owned by client? */
1031    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1032
1033    const struct gl_texture_format *TexFormat;
1034
1035    FetchTexelFunc FetchTexel;   /**< Texel fetch function pointer */
1036
1037    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1038    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1039
1040    /**
1041     * \name For device driver:
1042     */
1043    /*@{*/
1044    void *DriverData;            /**< Arbitrary device driver data */
1045    /*@}*/
1046 };
1047
1048
1049 /**
1050  * Texture object record
1051  */
1052 struct gl_texture_object {
1053    _glthread_Mutex Mutex;       /**< for thread safety */
1054    GLint RefCount;              /**< reference count */
1055    GLuint Name;                 /**< an unsigned integer */
1056    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1057    GLfloat Priority;            /**< in [0,1] */
1058    GLfloat BorderColor[4];      /**< unclamped */
1059    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1060    /** \name Wrap modes
1061     * Are GL_CLAMP, REPEAT, GL_CLAMP_TO_EDGE, and GL_CLAMP_TO_BORDER_ARB. */
1062    /*@{*/
1063    GLenum WrapS;
1064    GLenum WrapT;
1065    GLenum WrapR;
1066    /*@}*/
1067    GLenum MinFilter;            /**< minification filter */
1068    GLenum MagFilter;            /**< magnification filter */
1069    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1070    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1071    GLfloat LodBias;             /**< OpenGL 1.4 */
1072    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1073    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1074    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1075    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1076    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1077    GLfloat ShadowAmbient;
1078    GLenum CompareMode;          /**< GL_ARB_shadow */
1079    GLenum CompareFunc;          /**< GL_ARB_shadow */
1080    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1081    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1082    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1083    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1084    GLboolean _IsPowerOfTwo;     /**< Are all image dimensions powers of two? */
1085
1086    struct gl_texture_image *Image[MAX_TEXTURE_LEVELS];
1087
1088    /**
1089     * \name Texture cube faces
1090     *
1091     * Image[] is alias for *PosX[MAX_TEXTURE_LEVELS];
1092     */
1093    /*@{*/
1094    struct gl_texture_image *NegX[MAX_TEXTURE_LEVELS];
1095    struct gl_texture_image *PosY[MAX_TEXTURE_LEVELS];
1096    struct gl_texture_image *NegY[MAX_TEXTURE_LEVELS];
1097    struct gl_texture_image *PosZ[MAX_TEXTURE_LEVELS];
1098    struct gl_texture_image *NegZ[MAX_TEXTURE_LEVELS];
1099    /*@}*/
1100
1101    /** GL_EXT_paletted_texture */
1102    struct gl_color_table Palette;
1103
1104    GLboolean Complete;                  /**< Is texture object complete? */
1105    struct gl_texture_object *Next;      /**< Next in linked list */
1106
1107    /**
1108     * \name For device driver
1109     */
1110    /*@{*/
1111    void *DriverData;    /**< Arbitrary device driver data */
1112    /*@}*/
1113 };
1114
1115
1116 /**
1117  * Texture unit record
1118  */
1119 struct gl_texture_unit {
1120    GLuint Enabled;              /**< bitmask of TEXTURE_*_BIT flags */
1121    GLuint _ReallyEnabled;       /**< 0 or exactly one of TEXTURE_*_BIT flags */
1122
1123    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1124    GLfloat EnvColor[4];
1125    GLuint TexGenEnabled;        /**< Bitwise-OR of [STRQ]_BIT values */
1126    /** \name Tex coord generation mode
1127     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1128    /*@{*/
1129    GLenum GenModeS;
1130    GLenum GenModeT;
1131    GLenum GenModeR;
1132    GLenum GenModeQ;
1133    /*@}*/
1134    GLuint _GenBitS;
1135    GLuint _GenBitT;
1136    GLuint _GenBitR;
1137    GLuint _GenBitQ;
1138    GLuint _GenFlags;            /**< bitwise or of GenBit[STRQ] */
1139    GLfloat ObjectPlaneS[4];
1140    GLfloat ObjectPlaneT[4];
1141    GLfloat ObjectPlaneR[4];
1142    GLfloat ObjectPlaneQ[4];
1143    GLfloat EyePlaneS[4];
1144    GLfloat EyePlaneT[4];
1145    GLfloat EyePlaneR[4];
1146    GLfloat EyePlaneQ[4];
1147    GLfloat LodBias;             /**< for biasing mipmap levels */
1148
1149    /**
1150     * \name GL_EXT_texture_env_combine
1151     */
1152    /*@{*/
1153    GLenum CombineModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1154    GLenum CombineModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1155    GLenum CombineSourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1156    GLenum CombineSourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1157    GLenum CombineOperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1158    GLenum CombineOperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1159    GLuint CombineScaleShiftRGB; /**< 0, 1 or 2 */
1160    GLuint CombineScaleShiftA;   /**< 0, 1 or 2 */
1161    /*@}*/
1162
1163    struct gl_texture_object *Current1D;
1164    struct gl_texture_object *Current2D;
1165    struct gl_texture_object *Current3D;
1166    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1167    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1168
1169    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1170
1171    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1172    struct gl_texture_object Saved2D;
1173    struct gl_texture_object Saved3D;
1174    struct gl_texture_object SavedCubeMap;
1175    struct gl_texture_object SavedRect;
1176
1177    /* GL_SGI_texture_color_table */
1178    struct gl_color_table ColorTable;
1179    struct gl_color_table ProxyColorTable;
1180    GLboolean ColorTableEnabled;
1181 };
1182
1183
1184 /**
1185  * Texture attributes
1186  */
1187 struct gl_texture_attrib {
1188    /**
1189     * name multitexture
1190     */
1191    /**@{*/
1192    GLuint CurrentUnit;          /**< Active texture unit */
1193    GLuint _EnabledUnits;        /**< one bit set for each really-enabled unit */
1194    GLuint _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1195    GLuint _GenFlags;            /**< for texgen */
1196    GLuint _TexGenEnabled;
1197    GLuint _TexMatEnabled;
1198    /**@}*/
1199
1200    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1201
1202    struct gl_texture_object *Proxy1D;
1203    struct gl_texture_object *Proxy2D;
1204    struct gl_texture_object *Proxy3D;
1205    struct gl_texture_object *ProxyCubeMap;
1206    struct gl_texture_object *ProxyRect;
1207
1208    /** GL_EXT_shared_texture_palette */
1209    GLboolean SharedPalette;
1210    struct gl_color_table Palette;
1211 };
1212
1213
1214 /**
1215  * Transformation attributes.
1216  */
1217 struct gl_transform_attrib {
1218    GLenum MatrixMode;                           /**< Matrix mode */
1219    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1220    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1221    GLuint ClipPlanesEnabled;                    /**< on/off bitmask */
1222    GLboolean Normalize;                         /**< Normalize all normals? */
1223    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1224    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1225 };
1226
1227
1228 /**
1229  * Viewport attributes.
1230  */
1231 struct gl_viewport_attrib {
1232    GLint X, Y;                  /**< position */
1233    GLsizei Width, Height;       /**< size */
1234    GLfloat Near, Far;           /**< Depth buffer range */
1235    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1236 };
1237
1238
1239 /**
1240  * Node for the attribute stack
1241  */
1242 struct gl_attrib_node {
1243    GLbitfield kind;
1244    void *data;
1245    struct gl_attrib_node *next;
1246 };
1247
1248
1249 /**
1250  * GL_ARB_vertex_buffer_object buffer object
1251  */
1252 struct gl_buffer_object {
1253    GLint RefCount;
1254    GLuint Name;
1255    GLenum Usage;
1256    GLenum Access;
1257    GLvoid *Pointer;   /**< Only valid while buffer is mapped */
1258    GLuint Size;       /**< Size of data array in bytes */
1259    GLubyte *Data;     /**< The storage */
1260 };
1261
1262
1263
1264 /**
1265  * Client pixel packing/unpacking attributes
1266  */
1267 struct gl_pixelstore_attrib {
1268    GLint Alignment;
1269    GLint RowLength;
1270    GLint SkipPixels;
1271    GLint SkipRows;
1272    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1273    GLint SkipImages;      /**< for GL_EXT_texture3D */
1274    GLboolean SwapBytes;
1275    GLboolean LsbFirst;
1276    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1277    GLboolean Invert;        /**< GL_MESA_pack_invert */
1278 };
1279
1280
1281 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1282
1283
1284 /**
1285  * Client vertex array attributes
1286  */
1287 struct gl_client_array {
1288    GLint Size;
1289    GLenum Type;
1290    GLsizei Stride;              /**< user-specified stride */
1291    GLsizei StrideB;             /**< actual stride in bytes */
1292    GLubyte *Ptr;
1293    GLuint Flags;
1294    GLuint Enabled;              /**< one of the _NEW_ARRAY_ bits */
1295    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1296
1297    /**< GL_ARB_vertex_buffer_object */
1298    struct gl_buffer_object *BufferObj;
1299 };
1300
1301
1302 /**
1303  * Array attributes.
1304  */
1305 struct gl_array_attrib {
1306    struct gl_client_array Vertex;            /**< client data descriptors */
1307    struct gl_client_array Normal;
1308    struct gl_client_array Color;
1309    struct gl_client_array SecondaryColor;
1310    struct gl_client_array FogCoord;
1311    struct gl_client_array Index;
1312    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1313    struct gl_client_array EdgeFlag;
1314
1315    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1316
1317    GLint TexCoordInterleaveFactor;
1318    GLint ActiveTexture;         /**< Client Active Texture */
1319    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1320    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1321
1322    GLuint _Enabled;             /**< _NEW_ARRAY_* - bit set if array enabled */
1323    GLuint NewState;             /**< _NEW_ARRAY_* */
1324
1325 #if FEATURE_ARB_vertex_buffer_object
1326    struct gl_buffer_object *NullBufferObj;
1327    struct gl_buffer_object *ArrayBufferObj;
1328    struct gl_buffer_object *ElementArrayBufferObj;
1329 #endif
1330 };
1331
1332
1333 struct gl_feedback {
1334    GLenum Type;
1335    GLuint _Mask;                /* FB_* bits */
1336    GLfloat *Buffer;
1337    GLuint BufferSize;
1338    GLuint Count;
1339 };
1340
1341
1342 /**
1343  * Selection attributes.
1344  */
1345 struct gl_selection {
1346    GLuint *Buffer;      /**< selection buffer */
1347    GLuint BufferSize;   /**< size of the selection buffer */
1348    GLuint BufferCount;  /**< number of values in the selection buffer */
1349    GLuint Hits;         /**< number of records in the selection buffer */
1350    GLuint NameStackDepth; /**< name stack depth */
1351    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1352    GLboolean HitFlag;   /**< hit flag */
1353    GLfloat HitMinZ;     /**< minimum hit depth */
1354    GLfloat HitMaxZ;     /**< maximum hit depth */
1355 };
1356
1357
1358 /**
1359  * 1-D Evaluator control points
1360  */
1361 struct gl_1d_map
1362 {
1363    GLuint Order;        /**< Number of control points */
1364    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1365    GLfloat *Points;     /**< Points to contiguous control points */
1366 };
1367
1368
1369 /**
1370  * 2-D Evaluator control points
1371  */
1372 struct gl_2d_map
1373 {
1374    GLuint Uorder;               /**< Number of control points in U dimension */
1375    GLuint Vorder;               /**< Number of control points in V dimension */
1376    GLfloat u1, u2, du;
1377    GLfloat v1, v2, dv;
1378    GLfloat *Points;             /**< Points to contiguous control points */
1379 };
1380
1381
1382 /**
1383  * All evaluator control points
1384  */
1385 struct gl_evaluators
1386 {
1387    /**
1388     * \name 1-D maps
1389     */
1390    /*@{*/
1391    struct gl_1d_map Map1Vertex3;
1392    struct gl_1d_map Map1Vertex4;
1393    struct gl_1d_map Map1Index;
1394    struct gl_1d_map Map1Color4;
1395    struct gl_1d_map Map1Normal;
1396    struct gl_1d_map Map1Texture1;
1397    struct gl_1d_map Map1Texture2;
1398    struct gl_1d_map Map1Texture3;
1399    struct gl_1d_map Map1Texture4;
1400    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1401    /*@}*/
1402
1403    /**
1404     * \name 2-D maps
1405     */
1406    /*@{*/
1407    struct gl_2d_map Map2Vertex3;
1408    struct gl_2d_map Map2Vertex4;
1409    struct gl_2d_map Map2Index;
1410    struct gl_2d_map Map2Color4;
1411    struct gl_2d_map Map2Normal;
1412    struct gl_2d_map Map2Texture1;
1413    struct gl_2d_map Map2Texture2;
1414    struct gl_2d_map Map2Texture3;
1415    struct gl_2d_map Map2Texture4;
1416    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1417    /*@}*/
1418 };
1419
1420
1421 /**
1422  * NV_fragment_program runtime state
1423  */
1424 struct fp_machine
1425 {
1426    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1427    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1428    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1429    GLuint CondCodes[4];
1430 };
1431
1432
1433 /**
1434  * Names of the various vertex/fragment register files
1435  */
1436 enum register_file
1437 {
1438    PROGRAM_TEMPORARY = 10,
1439    PROGRAM_INPUT,
1440    PROGRAM_OUTPUT,
1441    PROGRAM_LOCAL_PARAM,
1442    PROGRAM_ENV_PARAM,
1443    PROGRAM_NAMED_PARAM,
1444    PROGRAM_STATE_VAR,
1445    PROGRAM_WRITE_ONLY
1446 };
1447
1448
1449 /* Vertex and fragment instructions */
1450 struct vp_instruction;
1451 struct fp_instruction;
1452
1453 struct program_parameter_list;
1454
1455
1456 /**
1457  * Base class for any kind of program object
1458  */
1459 struct program
1460 {
1461    GLuint Id;
1462    GLubyte *String;    /* Null-terminated program text */
1463    GLenum Target;
1464    GLenum Format;      /* String encoding format */
1465    GLint RefCount;
1466    GLboolean Resident;
1467    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1468    GLuint NumInstructions;  /* GL_ARB_vertex/fragment_program */
1469    GLuint NumTemporaries;
1470    GLuint NumParameters;
1471    GLuint NumAttributes;
1472    GLuint NumAddressRegs;
1473 };
1474
1475
1476 /** Vertex program object */
1477 struct vertex_program
1478 {
1479    struct program Base;   /* base class */
1480    struct vp_instruction *Instructions;  /* Compiled instructions */
1481    GLboolean IsPositionInvariant;  /* GL_NV_vertex_program1_1 */
1482    GLuint InputsRead;     /* Bitmask of which input regs are read */
1483    GLuint OutputsWritten; /* Bitmask of which output regs are written to */
1484 };
1485
1486
1487 /** Fragment program object */
1488 struct fragment_program
1489 {
1490    struct program Base;   /**< base class */
1491    struct fp_instruction *Instructions;  /**< Compiled instructions */
1492    GLuint InputsRead;     /**< Bitmask of which input regs are read */
1493    GLuint OutputsWritten; /**< Bitmask of which output regs are written to */
1494    GLuint TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_INDEX bitmask */
1495    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1496    GLuint NumTexInstructions;
1497    GLuint NumTexIndirections;
1498    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1499 };
1500
1501
1502 /**
1503  * State common to vertex and fragment programs.
1504  */
1505 struct program_state {
1506    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_NV */
1507    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_NV */
1508 };
1509
1510
1511 /**
1512  * State vars for GL_NV_vertex_program
1513  */
1514 struct vertex_program_state
1515 {
1516    GLboolean Enabled;                    /**< GL_VERTEX_PROGRAM_NV */
1517    GLboolean PointSizeEnabled;           /**< GL_VERTEX_PROGRAM_POINT_SIZE_NV */
1518    GLboolean TwoSideEnabled;             /**< GL_VERTEX_PROGRAM_TWO_SIDE_NV */
1519    struct vertex_program *Current;       /**< ptr to currently bound program */
1520
1521    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1522    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1523
1524    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1525    /* Only used during program execution (may be moved someday): */
1526    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1527    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1528    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1529    GLint AddressReg[4];
1530
1531 #if FEATURE_MESA_program_debug
1532    GLprogramcallbackMESA Callback;
1533    GLvoid *CallbackData;
1534    GLboolean CallbackEnabled;
1535    GLuint CurrentPosition;
1536 #endif
1537 };
1538
1539
1540 /*
1541  * State for GL_ARB/NV_fragment_program
1542  */
1543 struct fragment_program_state
1544 {
1545    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1546    struct fragment_program *Current;     /* ptr to currently bound program */
1547    struct fp_machine Machine;            /* machine state */
1548    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1549
1550 #if FEATURE_MESA_program_debug
1551    GLprogramcallbackMESA Callback;
1552    GLvoid *CallbackData;
1553    GLboolean CallbackEnabled;
1554    GLuint CurrentPosition;
1555 #endif
1556 };
1557
1558
1559 /*
1560  * State for GL_ARB_occlusion_query
1561  */
1562 struct occlusion_state
1563 {
1564    GLboolean Active;
1565    GLuint CurrentQueryObject;
1566    GLuint PassedCounter;
1567    struct _mesa_HashTable *QueryObjects;
1568 };
1569
1570
1571 /**
1572  * State which can be shared by multiple contexts:
1573  */
1574 struct gl_shared_state
1575 {
1576    _glthread_Mutex Mutex;                  /**< for thread safety */
1577    GLint RefCount;                         /**< Reference count */
1578    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
1579    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
1580    struct gl_texture_object *TexObjectList;/**< Linked list of texture objects */
1581
1582    /**
1583     * \name Default texture objects (shared by all multi-texture units)
1584     */
1585    /*@{*/
1586    struct gl_texture_object *Default1D;
1587    struct gl_texture_object *Default2D;
1588    struct gl_texture_object *Default3D;
1589    struct gl_texture_object *DefaultCubeMap;
1590    struct gl_texture_object *DefaultRect;
1591    /*@}*/
1592
1593    /**
1594     * \name GL_NV_vertex/_program
1595     */
1596    /*@{*/
1597    struct _mesa_HashTable *Programs;
1598 #if FEATURE_ARB_vertex_program
1599    struct program *DefaultVertexProgram;
1600 #endif
1601 #if FEATURE_ARB_fragment_program
1602    struct program *DefaultFragmentProgram;
1603 #endif
1604    /*@}*/
1605
1606 #if FEATURE_ARB_vertex_buffer_object
1607    struct _mesa_HashTable *BufferObjects;
1608 #endif
1609
1610    void *DriverData;  /**< Device driver shared state */
1611 };
1612
1613
1614 /**
1615  * Frame buffer.
1616  *
1617  * A "frame buffer" is a color buffer and its optional ancillary buffers:
1618  * depth, accum, stencil, and software-simulated alpha buffers.
1619  * In C++ terms, think of this as a base class from which device drivers
1620  * will make derived classes.
1621  */
1622 struct gl_frame_buffer
1623 {
1624    GLvisual Visual;             /**< The corresponding visual */
1625
1626    GLuint Width, Height;        /**< size of frame buffer in pixels */
1627
1628    GLboolean UseSoftwareDepthBuffer;
1629    GLboolean UseSoftwareAccumBuffer;
1630    GLboolean UseSoftwareStencilBuffer;
1631    GLboolean UseSoftwareAlphaBuffers;
1632
1633    /** \name Software depth (aka Z) buffer */
1634    /*@{*/
1635    GLvoid *DepthBuffer;         /**< array [Width*Height] of GLushort or GLuint*/
1636    /*@}*/
1637
1638    /** \name Software stencil buffer */
1639    /*@{*/
1640    GLstencil *Stencil;          /**< array [Width*Height] of GLstencil values */
1641    /*@}*/
1642
1643    /** \name Software accumulation buffer */
1644    /*@{*/
1645    GLaccum *Accum;              /**< array [4*Width*Height] of GLaccum values */
1646    /*@}*/
1647
1648    /** \name Software alpha planes */
1649    /*@{*/
1650    GLvoid *FrontLeftAlpha;      /**< array [Width*Height] of GLubyte */
1651    GLvoid *BackLeftAlpha;       /**< array [Width*Height] of GLubyte */
1652    GLvoid *FrontRightAlpha;     /**< array [Width*Height] of GLubyte */
1653    GLvoid *BackRightAlpha;      /**< array [Width*Height] of GLubyte */
1654    /*@}*/
1655
1656    /**
1657     * \name Drawing bounds
1658     *
1659     * Intersection of window size and scissor box
1660     */
1661    /*@{*/
1662    GLint _Xmin;  /**< inclusive */
1663    GLint _Ymin;  /**< inclusive */
1664    GLint _Xmax;  /**< exclusive */
1665    GLint _Ymax;  /**< exclusive */
1666    /*@}*/
1667 };
1668
1669
1670 /**
1671  * Constants which may be overridden by device driver during context creation
1672  * but are never changed after that.
1673  */
1674 struct gl_constants
1675 {
1676    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
1677    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
1678    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
1679    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
1680    GLuint MaxTextureCoordUnits;
1681    GLuint MaxTextureImageUnits;
1682    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
1683    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
1684    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
1685    GLuint MaxArrayLockSize;
1686    GLint SubPixelBits;
1687    GLfloat MinPointSize, MaxPointSize;          /* aliased */
1688    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
1689    GLfloat PointSizeGranularity;
1690    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
1691    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
1692    GLfloat LineWidthGranularity;
1693    GLuint NumAuxBuffers;
1694    GLuint MaxColorTableSize;
1695    GLuint MaxConvolutionWidth;
1696    GLuint MaxConvolutionHeight;
1697    GLuint MaxClipPlanes;
1698    GLuint MaxLights;
1699    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
1700    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
1701    /* GL_ARB_vertex_program */
1702    GLuint MaxVertexProgramInstructions;
1703    GLuint MaxVertexProgramAttribs;
1704    GLuint MaxVertexProgramTemps;
1705    GLuint MaxVertexProgramLocalParams;
1706    GLuint MaxVertexProgramEnvParams;
1707    GLuint MaxVertexProgramAddressRegs;
1708    /* GL_ARB_fragment_program */
1709    GLuint MaxFragmentProgramInstructions;
1710    GLuint MaxFragmentProgramAttribs;
1711    GLuint MaxFragmentProgramTemps;
1712    GLuint MaxFragmentProgramLocalParams;
1713    GLuint MaxFragmentProgramEnvParams;
1714    GLuint MaxFragmentProgramAddressRegs;
1715    GLuint MaxFragmentProgramAluInstructions;
1716    GLuint MaxFragmentProgramTexInstructions;
1717    GLuint MaxFragmentProgramTexIndirections;
1718    /* vertex or fragment program */
1719    GLuint MaxProgramMatrices;
1720    GLuint MaxProgramMatrixStackDepth;
1721 };
1722
1723
1724 /**
1725  * List of extensions.
1726  */
1727 struct gl_extensions
1728 {
1729    /**
1730     * \name Flags to quickly test if certain extensions are available.
1731     *
1732     * Not every extension needs to have such a flag, but it's encouraged.
1733     */
1734    /*@{*/
1735    GLboolean dummy;  /* don't remove this! */
1736    GLboolean ARB_depth_texture;
1737    GLboolean ARB_fragment_program;
1738    GLboolean ARB_imaging;
1739    GLboolean ARB_multisample;
1740    GLboolean ARB_multitexture;
1741    GLboolean ARB_occlusion_query;
1742    GLboolean ARB_point_sprite;
1743    GLboolean ARB_shadow;
1744    GLboolean ARB_texture_border_clamp;
1745    GLboolean ARB_texture_compression;
1746    GLboolean ARB_texture_cube_map;
1747    GLboolean ARB_texture_env_combine;
1748    GLboolean ARB_texture_env_crossbar;
1749    GLboolean ARB_texture_env_dot3;
1750    GLboolean ARB_texture_mirrored_repeat;
1751    GLboolean ARB_texture_non_power_of_two;
1752    GLboolean ARB_vertex_buffer_object;
1753    GLboolean ARB_vertex_program;
1754    GLboolean ARB_window_pos;
1755    GLboolean ATI_texture_mirror_once;
1756    GLboolean ATI_texture_env_combine3;
1757    GLboolean EXT_blend_color;
1758    GLboolean EXT_blend_func_separate;
1759    GLboolean EXT_blend_logic_op;
1760    GLboolean EXT_blend_minmax;
1761    GLboolean EXT_blend_subtract;
1762    GLboolean EXT_convolution;
1763    GLboolean EXT_compiled_vertex_array;
1764    GLboolean EXT_depth_bounds_test;
1765    GLboolean EXT_fog_coord;
1766    GLboolean EXT_histogram;
1767    GLboolean EXT_multi_draw_arrays;
1768    GLboolean EXT_paletted_texture;
1769    GLboolean EXT_point_parameters;
1770    GLboolean EXT_shadow_funcs;
1771    GLboolean EXT_secondary_color;
1772    GLboolean EXT_shared_texture_palette;
1773    GLboolean EXT_stencil_wrap;
1774    GLboolean EXT_stencil_two_side;
1775    GLboolean EXT_texture3D;
1776    GLboolean EXT_texture_compression_s3tc;
1777    GLboolean EXT_texture_env_add;
1778    GLboolean EXT_texture_env_combine;
1779    GLboolean EXT_texture_env_dot3;
1780    GLboolean EXT_texture_filter_anisotropic;
1781    GLboolean EXT_texture_lod_bias;
1782    GLboolean EXT_texture_mirror_clamp;
1783    GLboolean EXT_vertex_array_set;
1784    GLboolean HP_occlusion_test;
1785    GLboolean IBM_rasterpos_clip;
1786    GLboolean IBM_multimode_draw_arrays;
1787    GLboolean MESA_pack_invert;
1788    GLboolean MESA_packed_depth_stencil;
1789    GLboolean MESA_program_debug;
1790    GLboolean MESA_resize_buffers;
1791    GLboolean MESA_ycbcr_texture;
1792    GLboolean NV_blend_square;
1793    GLboolean NV_fragment_program;
1794    GLboolean NV_point_sprite;
1795    GLboolean NV_texture_rectangle;
1796    GLboolean NV_vertex_program;
1797    GLboolean NV_vertex_program1_1;
1798    GLboolean SGI_color_matrix;
1799    GLboolean SGI_color_table;
1800    GLboolean SGI_texture_color_table;
1801    GLboolean SGIS_generate_mipmap;
1802    GLboolean SGIS_pixel_texture;
1803    GLboolean SGIS_texture_edge_clamp;
1804    GLboolean SGIX_depth_texture;
1805    GLboolean SGIX_pixel_texture;
1806    GLboolean SGIX_shadow;
1807    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
1808    GLboolean TDFX_texture_compression_FXT1;
1809    GLboolean APPLE_client_storage;
1810    /*@}*/
1811    /* The extension string */
1812    const GLubyte *String;
1813 };
1814
1815
1816 /**
1817  * A stack of matrices (projection, modelview, color, texture, etc).
1818  */
1819 struct matrix_stack
1820 {
1821    GLmatrix *Top;      /**< points into Stack */
1822    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
1823    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
1824    GLuint MaxDepth;    /**< size of Stack[] array */
1825    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
1826 };
1827
1828
1829 /**
1830  * \name Bits for image transfer operations
1831  *
1832  * \sa __GLcontextRec::ImageTransferState.
1833  */
1834 /*@{*/
1835 #define IMAGE_SCALE_BIAS_BIT                      0x1
1836 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
1837 #define IMAGE_MAP_COLOR_BIT                       0x4
1838 #define IMAGE_COLOR_TABLE_BIT                     0x8
1839 #define IMAGE_CONVOLUTION_BIT                     0x10
1840 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
1841 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
1842 #define IMAGE_COLOR_MATRIX_BIT                    0x80
1843 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
1844 #define IMAGE_HISTOGRAM_BIT                       0x200
1845 #define IMAGE_MIN_MAX_BIT                         0x400
1846
1847 /** Transfer ops up to convolution */
1848 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
1849                                     IMAGE_SHIFT_OFFSET_BIT |   \
1850                                     IMAGE_MAP_COLOR_BIT |      \
1851                                     IMAGE_COLOR_TABLE_BIT)
1852
1853 /** Transfer ops after convolution */
1854 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
1855                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
1856                                      IMAGE_COLOR_MATRIX_BIT |                 \
1857                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
1858                                      IMAGE_HISTOGRAM_BIT |                    \
1859                                      IMAGE_MIN_MAX_BIT)
1860 /*@}*/
1861
1862
1863 /**
1864  * \name Bits to indicate what state has changed.
1865  *
1866  * 6 unused flags.
1867  */
1868 /*@{*/
1869 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
1870 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
1871 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
1872 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
1873 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
1874 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
1875 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
1876 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
1877 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
1878 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
1879 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
1880 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
1881 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
1882 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
1883 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
1884 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
1885 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
1886 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
1887 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
1888 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
1889 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
1890 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
1891 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
1892 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
1893 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
1894 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
1895 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
1896 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
1897 #define _NEW_ALL ~0
1898 /*@}*/
1899
1900
1901 /**
1902  * \name Bits to track array state changes
1903  *
1904  * Also used to summarize array enabled.
1905  */
1906 /*@{*/
1907 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
1908 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
1909 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
1910 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
1911 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
1912 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
1913 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
1914 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
1915 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
1916 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
1917 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
1918 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
1919 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
1920 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
1921 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
1922 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
1923 #define _NEW_ARRAY_ATTRIB_0         0x1  /* alias conventional arrays */
1924 #define _NEW_ARRAY_ALL              0xffffffff
1925
1926
1927 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
1928 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
1929 /*@}*/
1930
1931
1932 /**
1933  * \name A bunch of flags that we think might be useful to drivers.
1934  *
1935  * Set in the __GLcontextRec::_TriangleCaps bitfield.
1936  */
1937 /*@{*/
1938 #define DD_FLATSHADE                0x1
1939 #define DD_SEPARATE_SPECULAR        0x2
1940 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
1941 #define DD_TRI_LIGHT_TWOSIDE        0x8
1942 #define DD_TRI_UNFILLED             0x10
1943 #define DD_TRI_SMOOTH               0x20
1944 #define DD_TRI_STIPPLE              0x40
1945 #define DD_TRI_OFFSET               0x80
1946 #define DD_LINE_SMOOTH              0x100
1947 #define DD_LINE_STIPPLE             0x200
1948 #define DD_LINE_WIDTH               0x400
1949 #define DD_POINT_SMOOTH             0x800
1950 #define DD_POINT_SIZE               0x1000
1951 #define DD_POINT_ATTEN              0x2000
1952 /*@}*/
1953
1954
1955 /**
1956  * \name Define the state changes under which each of these bits might change
1957  */
1958 /*@{*/
1959 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
1960 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG)
1961 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
1962 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
1963 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
1964 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
1965 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
1966 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
1967 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
1968 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
1969 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
1970 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
1971 #define _DD_NEW_POINT_SIZE               _NEW_POINT
1972 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
1973 /*@}*/
1974
1975
1976 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
1977                                            _NEW_TEXTURE |       \
1978                                            _NEW_POINT |         \
1979                                            _NEW_MODELVIEW)
1980
1981 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
1982                                            _NEW_TEXTURE)
1983
1984 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
1985
1986
1987
1988
1989 /*
1990  * Forward declaration of display list data types:
1991  */
1992 union node;
1993 typedef union node Node;
1994
1995
1996 /* This has to be included here. */
1997 #include "dd.h"
1998
1999
2000 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2001
2002 /**
2003  * Core Mesa's support for tnl modules:
2004  */
2005 struct gl_tnl_module {
2006    /**
2007     * Vertex format to be lazily swapped into current dispatch.
2008     */
2009    GLvertexformat *Current;
2010
2011    /**
2012     * \name Record of functions swapped out.
2013     * On restore, only need to swap these functions back in.
2014     */
2015    /*@{*/
2016    void *Swapped[NUM_VERTEX_FORMAT_ENTRIES][2];
2017    GLuint SwapCount;
2018    /*@}*/
2019 };
2020
2021
2022 /**
2023  * Mesa context
2024  *
2025  * This is the central context data structure for Mesa.  Almost all
2026  * OpenGL state is contained in this structure.
2027  * Think of this as a base class from which device drivers will derive
2028  * sub classes.
2029  */
2030 struct __GLcontextRec {
2031    /**
2032     * \name OS related interfaces.
2033     *
2034     * These \b must be the first members of this structure, because they are
2035     * exposed to the outside world (i.e. GLX extension).
2036     */
2037    /*@{*/
2038    __GLimports imports;
2039    __GLexports exports;
2040    /*@}*/
2041
2042    /** State possibly shared with other contexts in the address space */
2043    struct gl_shared_state *Shared;
2044
2045    /** \name API function pointer tables */
2046    /*@{*/
2047    struct _glapi_table *Save;   /**< Display list save functions */
2048    struct _glapi_table *Exec;   /**< Execute functions */
2049    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2050    /*@}*/
2051
2052    GLboolean ExecPrefersFloat;  /**< What preference for color conversion? */
2053    GLboolean SavePrefersFloat;
2054
2055    GLvisual Visual;
2056    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2057    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2058
2059    /**
2060     * Device driver function pointer table
2061     */
2062    struct dd_function_table Driver;
2063
2064    void *DriverCtx;     /**< Points to device driver context/state */
2065    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2066
2067    /** Core/Driver constants */
2068    struct gl_constants Const;
2069
2070    /** \name The various 4x4 matrix stacks */
2071    /*@{*/
2072    struct matrix_stack ModelviewMatrixStack;
2073    struct matrix_stack ProjectionMatrixStack;
2074    struct matrix_stack ColorMatrixStack;
2075    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2076    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2077    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2078    /*@}*/
2079
2080    /** Combined modelview and projection matrix */
2081    GLmatrix _ModelProjectMatrix;
2082
2083    /** \name Display lists */
2084    /*@{*/
2085    GLuint CallDepth;            /**< Current recursion calling depth */
2086    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2087    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2088    Node *CurrentListPtr;        /**< Head of list being compiled */
2089    GLuint CurrentListNum;       /**< Number of the list being compiled */
2090    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2091    GLuint CurrentPos;           /**< Index into current block of nodes */
2092    /*@}*/
2093
2094    /** Extensions */
2095    struct gl_extensions Extensions;
2096
2097    /** \name Renderer attribute stack */
2098    /*@{*/
2099    GLuint AttribStackDepth;
2100    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2101    /*@}*/
2102
2103    /** \name Renderer attribute groups
2104     *
2105     * We define a struct for each attribute group to make pushing and popping
2106     * attributes easy.  Also it's a good organization.
2107     */
2108    /*@{*/
2109    struct gl_accum_attrib       Accum;          /**< Accumulation buffer attributes */
2110    struct gl_colorbuffer_attrib Color;          /**< Color buffers attributes */
2111    struct gl_current_attrib     Current;        /**< Current attributes */
2112    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2113    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2114    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2115    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2116    struct gl_light_attrib       Light;          /**< Light attributes */
2117    struct gl_line_attrib        Line;           /**< Line attributes */
2118    struct gl_list_attrib        List;           /**< List attributes */
2119    struct gl_multisample_attrib Multisample;
2120    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2121    struct gl_point_attrib       Point;          /**< Point attributes */
2122    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2123    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2124    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2125    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2126    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2127    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2128    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2129    /*@}*/
2130
2131    /** \name Other attribute groups */
2132    /*@{*/
2133    struct gl_histogram_attrib   Histogram;
2134    struct gl_minmax_attrib      MinMax;
2135    struct gl_convolution_attrib Convolution1D;
2136    struct gl_convolution_attrib Convolution2D;
2137    struct gl_convolution_attrib Separable2D;
2138    /*@}*/
2139
2140    /** \name Client attribute stack */
2141    /*@{*/
2142    GLuint ClientAttribStackDepth;
2143    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2144    /*@}*/
2145
2146    /** \name Client attribute groups */
2147    /*@{*/
2148    struct gl_array_attrib       Array;  /**< Vertex arrays */
2149    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2150    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2151
2152    struct gl_evaluators EvalMap;   /**< All evaluators */
2153    struct gl_feedback   Feedback;  /**< Feedback */
2154    struct gl_selection  Select;    /**< Selection */
2155
2156    struct gl_color_table ColorTable;       /**< Pre-convolution */
2157    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2158    struct gl_color_table PostConvolutionColorTable;
2159    struct gl_color_table ProxyPostConvolutionColorTable;
2160    struct gl_color_table PostColorMatrixColorTable;
2161    struct gl_color_table ProxyPostColorMatrixColorTable;
2162
2163    struct program_state Program;             /**< for vertex or fragment progs */
2164    struct vertex_program_state VertexProgram;      /**< GL_NV_vertex_program */
2165    struct fragment_program_state FragmentProgram;  /**< GL_NV_fragment_program */
2166
2167    struct occlusion_state Occlusion;  /**< GL_ARB_occlusion_query */
2168
2169    GLenum ErrorValue;        /**< Last error code */
2170    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2171    GLuint NewState;          /**< bitwise-or of _NEW_* flags */
2172    /*@}*/
2173
2174    /** \name Derived */
2175    /*@{*/
2176    GLuint _TriangleCaps;      /**< bitwise-or of DD_* flags */
2177    GLuint _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2178    GLfloat _EyeZDir[3];
2179    GLfloat _ModelViewInvScale;
2180    GLuint _NeedEyeCoords;
2181    GLuint _ForceEyeCoords;
2182    GLboolean _RotateMode;
2183    GLenum _CurrentProgram;    /* currently executing program */
2184
2185    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2186    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2187    /**@}*/
2188
2189    struct gl_list_extensions listext; /**< driver dlist extensions */
2190
2191
2192    GLboolean OcclusionResult;       /**< for GL_HP_occlusion_test */
2193    GLboolean OcclusionResultSaved;  /**< for GL_HP_occlusion_test */
2194    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2195                     *
2196                     * We don't have a better way to communicate this value from
2197                     * swrast_setup to swrast. */
2198
2199
2200    /** \name Z buffer stuff */
2201    /*@{*/
2202    GLuint DepthMax;     /**< Max depth buffer value */
2203    GLfloat DepthMaxF;   /**< Float max depth buffer value */
2204    GLfloat MRD;         /**< minimum resolvable difference in Z values */
2205    /*@}*/
2206
2207    /** Should 3Dfx Glide driver catch signals? */
2208    GLboolean CatchSignals;
2209
2210    /** \name For debugging/development only */
2211    /*@{*/
2212    GLboolean FirstTimeCurrent;
2213    /*@}*/
2214
2215    /** Dither disable via MESA_NO_DITHER env var */
2216    GLboolean NoDither;
2217
2218    /** Core tnl module support */
2219    struct gl_tnl_module TnlModule;
2220
2221    /**
2222     * \name Hooks for module contexts.
2223     *
2224     * These will eventually live in the driver or elsewhere.
2225     */
2226    /*@{*/
2227    void *swrast_context;
2228    void *swsetup_context;
2229    void *swtnl_context;
2230    void *swtnl_im;
2231    void *acache_context;
2232    void *aelt_context;
2233    /*@}*/
2234 };
2235
2236
2237 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2238 extern const char *_mesa_prim_name[GL_POLYGON+4];
2239
2240
2241 #ifdef MESA_DEBUG
2242 extern int MESA_VERBOSE;
2243 extern int MESA_DEBUG_FLAGS;
2244 #else
2245 # define MESA_VERBOSE 0
2246 # define MESA_DEBUG_FLAGS 0
2247 # ifndef NDEBUG
2248 #  define NDEBUG
2249 # endif
2250 #endif
2251
2252
2253 enum _verbose {
2254    VERBOSE_VARRAY               = 0x0001,
2255    VERBOSE_TEXTURE              = 0x0002,
2256    VERBOSE_IMMEDIATE            = 0x0004,
2257    VERBOSE_PIPELINE             = 0x0008,
2258    VERBOSE_DRIVER               = 0x0010,
2259    VERBOSE_STATE                = 0x0020,
2260    VERBOSE_API                  = 0x0040,
2261    VERBOSE_DISPLAY_LIST         = 0x0100,
2262    VERBOSE_LIGHTING             = 0x0200,
2263    VERBOSE_PRIMS                = 0x0400,
2264    VERBOSE_VERTS                = 0x0800
2265 };
2266
2267
2268 enum _debug {
2269    DEBUG_ALWAYS_FLUSH           = 0x1
2270 };
2271
2272
2273
2274 #define Elements(x) sizeof(x)/sizeof(*(x))
2275
2276
2277 #endif /* TYPES_H */