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
  43 #include "math/m_matrix.h"      /* GLmatrix */
  44
  45 #if defined(MESA_TRACE)
  46 #include "Trace/tr_context.h"
  47 #endif
  48
  49
  50 /**
  51  * Color channel data type.
  52  */
  53 #if CHAN_BITS == 8
  54    typedef GLubyte GLchan;
  55 #define CHAN_MAX 255
  56 #define CHAN_MAXF 255.0F
  57 #define CHAN_TYPE GL_UNSIGNED_BYTE
  58 #elif CHAN_BITS == 16
  59    typedef GLushort GLchan;
  60 #define CHAN_MAX 65535
  61 #define CHAN_MAXF 65535.0F
  62 #define CHAN_TYPE GL_UNSIGNED_SHORT
  63 #elif CHAN_BITS == 32
  64    typedef GLfloat GLchan;
  65 #define CHAN_MAX 1.0
  66 #define CHAN_MAXF 1.0F
  67 #define CHAN_TYPE GL_FLOAT
  68 #else
  69 #error "illegal number of color channel bits"
  70 #endif
  71
  72
  73 /**
  74  * Accumulation buffer data type.
  75  */
  76 #if ACCUM_BITS==8
  77    typedef GLbyte GLaccum;
  78 #elif ACCUM_BITS==16
  79    typedef GLshort GLaccum;
  80 #elif ACCUM_BITS==32
  81    typedef GLfloat GLaccum;
  82 #else
  83 #  error "illegal number of accumulation bits"
  84 #endif
  85
  86
  87 /**
  88  * Stencil buffer data type.
  89  */
  90 #if STENCIL_BITS==8
  91    typedef GLubyte GLstencil;
  92 #  define STENCIL_MAX 0xff
  93 #elif STENCIL_BITS==16
  94    typedef GLushort GLstencil;
  95 #  define STENCIL_MAX 0xffff
  96 #else
  97 #  error "illegal number of stencil bits"
  98 #endif
  99
 100
 101 /**
 102  * Depth buffer data type.
 103  *
 104  * \note Must be 32-bits!
 105  */
 106 typedef GLuint GLdepth;
 107
 108
 109 /**
 110  * Fixed point data type.
 111  */
 112 typedef int GLfixed;
 113 /*
 114  * Fixed point arithmetic macros
 115  */
 116 #ifdef FIXED_14
 117 #define FIXED_ONE       0x00004000
 118 #define FIXED_HALF      0x00002000
 119 #define FIXED_FRAC_MASK 0x00003FFF
 120 #define FIXED_SCALE     16384.0f
 121 #define FIXED_SHIFT     14
 122 #else
 123 #define FIXED_ONE       0x00000800
 124 #define FIXED_HALF      0x00000400
 125 #define FIXED_FRAC_MASK 0x000007FF
 126 #define FIXED_SCALE     2048.0f
 127 #define FIXED_SHIFT     11
 128 #endif
 129 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
 130 #define FIXED_EPSILON   1
 131 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 132 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 133 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 134 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 135 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 136 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 137 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 138 #define PosFloatToFixed(X)      FloatToFixed(X)
 139 #define SignedFloatToFixed(X)   FloatToFixed(X)
 140
 141
 142
 143 /**
 144  * \name Some forward type declarations
 145  */
 146 /*@{*/
 147 struct _mesa_HashTable;
 148 struct gl_texture_image;
 149 struct gl_texture_object;
 150 typedef struct __GLcontextRec GLcontext;
 151 typedef struct __GLcontextModesRec GLvisual;
 152 typedef struct gl_frame_buffer GLframebuffer;
 153 /*@}*/
 154
 155
 156
 157 /**
 158  * These define the aliases between numbered vertex attributes and
 159  * conventional OpenGL vertex attributes.  We use these values in
 160  * quite a few places.
 161  *
 162  * New in Mesa 4.1.
 163  */
 164 enum {
 165         VERT_ATTRIB_POS = 0,
 166         VERT_ATTRIB_WEIGHT = 1,
 167         VERT_ATTRIB_NORMAL = 2,
 168         VERT_ATTRIB_COLOR0 = 3,
 169         VERT_ATTRIB_COLOR1 = 4,
 170         VERT_ATTRIB_FOG = 5,
 171         VERT_ATTRIB_SIX = 6,
 172         VERT_ATTRIB_SEVEN = 7,
 173         VERT_ATTRIB_TEX0 = 8,
 174         VERT_ATTRIB_TEX1 = 9,
 175         VERT_ATTRIB_TEX2 = 10,
 176         VERT_ATTRIB_TEX3 = 11,
 177         VERT_ATTRIB_TEX4 = 12,
 178         VERT_ATTRIB_TEX5 = 13,
 179         VERT_ATTRIB_TEX6 = 14,
 180         VERT_ATTRIB_TEX7 = 15,
 181         VERT_ATTRIB_MAX = 16
 182 } ;
 183
 184 /* These are used in bitfields in many places */
 185 #define VERT_BIT_POS     (1 << VERT_ATTRIB_POS)
 186 #define VERT_BIT_WEIGHT  (1 << VERT_ATTRIB_WEIGHT)
 187 #define VERT_BIT_NORMAL  (1 << VERT_ATTRIB_NORMAL)
 188 #define VERT_BIT_COLOR0  (1 << VERT_ATTRIB_COLOR0)
 189 #define VERT_BIT_COLOR1  (1 << VERT_ATTRIB_COLOR1)
 190 #define VERT_BIT_FOG     (1 << VERT_ATTRIB_FOG)
 191 #define VERT_BIT_SIX     (1 << VERT_ATTRIB_SIX)
 192 #define VERT_BIT_SEVEN   (1 << VERT_ATTRIB_SEVEN)
 193 #define VERT_BIT_TEX0    (1 << VERT_ATTRIB_TEX0)
 194 #define VERT_BIT_TEX1    (1 << VERT_ATTRIB_TEX1)
 195 #define VERT_BIT_TEX2    (1 << VERT_ATTRIB_TEX2)
 196 #define VERT_BIT_TEX3    (1 << VERT_ATTRIB_TEX3)
 197 #define VERT_BIT_TEX4    (1 << VERT_ATTRIB_TEX4)
 198 #define VERT_BIT_TEX5    (1 << VERT_ATTRIB_TEX5)
 199 #define VERT_BIT_TEX6    (1 << VERT_ATTRIB_TEX6)
 200 #define VERT_BIT_TEX7    (1 << VERT_ATTRIB_TEX7)
 201
 202 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 203
 204
 205
 206 /**
 207  * Maximum number of temporary vertices required for clipping.
 208  *
 209  * Used in array_cache and tnl modules.
 210  */
 211 #define MAX_CLIPPED_VERTICES ((2 * (6 + MAX_CLIP_PLANES))+1)
 212
 213
 214 /**
 215  * Data structure for color tables
 216  */
 217 struct gl_color_table {
 218    GLenum Format;         /**< GL_ALPHA, GL_RGB, GL_RGB, etc */
 219    GLenum IntFormat;
 220    GLuint Size;           /**< number of entries (rows) in table */
 221    GLvoid *Table;         /**< either GLfloat * or GLchan * */
 222    GLboolean FloatTable;  /**< are entries stored as floats? */
 223    GLubyte RedSize;
 224    GLubyte GreenSize;
 225    GLubyte BlueSize;
 226    GLubyte AlphaSize;
 227    GLubyte LuminanceSize;
 228    GLubyte IntensitySize;
 229 };
 230
 231
 232 /**
 233  * \name Bit flags used for updating material values.
 234  */
 235 /*@{*/
 236 #define MAT_ATTRIB_FRONT_AMBIENT           0
 237 #define MAT_ATTRIB_BACK_AMBIENT            1
 238 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 239 #define MAT_ATTRIB_BACK_DIFFUSE            3
 240 #define MAT_ATTRIB_FRONT_SPECULAR          4
 241 #define MAT_ATTRIB_BACK_SPECULAR           5
 242 #define MAT_ATTRIB_FRONT_EMISSION          6
 243 #define MAT_ATTRIB_BACK_EMISSION           7
 244 #define MAT_ATTRIB_FRONT_SHININESS         8
 245 #define MAT_ATTRIB_BACK_SHININESS          9
 246 #define MAT_ATTRIB_FRONT_INDEXES           10
 247 #define MAT_ATTRIB_BACK_INDEXES            11
 248 #define MAT_ATTRIB_MAX                     12
 249
 250 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 251 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 252 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 253 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 254 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 255 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 256
 257 #define MAT_INDEX_AMBIENT  0
 258 #define MAT_INDEX_DIFFUSE  1
 259 #define MAT_INDEX_SPECULAR 2
 260
 261 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 262 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 263 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 264 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 265 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 266 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 267 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 268 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 269 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 270 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 271 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 272 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 273
 274
 275 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 276                                  MAT_BIT_FRONT_AMBIENT |        \
 277                                  MAT_BIT_FRONT_DIFFUSE |        \
 278                                  MAT_BIT_FRONT_SPECULAR |       \
 279                                  MAT_BIT_FRONT_SHININESS |      \
 280                                  MAT_BIT_FRONT_INDEXES)
 281
 282 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 283                                  MAT_BIT_BACK_AMBIENT |         \
 284                                  MAT_BIT_BACK_DIFFUSE |         \
 285                                  MAT_BIT_BACK_SPECULAR |        \
 286                                  MAT_BIT_BACK_SHININESS |       \
 287                                  MAT_BIT_BACK_INDEXES)
 288
 289 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 290 /*@}*/
 291
 292
 293 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 294 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 295
 296 /**
 297  * Material shininess lookup table.
 298  */
 299 struct gl_shine_tab {
 300    struct gl_shine_tab *next, *prev;
 301    GLfloat tab[SHINE_TABLE_SIZE+1];
 302    GLfloat shininess;
 303    GLuint refcount;
 304 };
 305
 306
 307 /**
 308  * Light.
 309  */
 310 struct gl_light {
 311    struct gl_light *next;       /**< double linked list with sentinel */
 312    struct gl_light *prev;
 313
 314    GLfloat Ambient[4];          /**< ambient color */
 315    GLfloat Diffuse[4];          /**< diffuse color */
 316    GLfloat Specular[4];         /**< specular color */
 317    GLfloat EyePosition[4];      /**< position in eye coordinates */
 318    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 319    GLfloat SpotExponent;
 320    GLfloat SpotCutoff;          /**< in degrees */
 321    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 322    GLfloat ConstantAttenuation;
 323    GLfloat LinearAttenuation;
 324    GLfloat QuadraticAttenuation;
 325    GLboolean Enabled;           /**< On/off flag */
 326
 327    /**
 328     * \name Derived fields
 329     */
 330    /*@{*/
 331    GLuint _Flags;               /**< State */
 332
 333    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 334    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 335    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 336    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 337    GLfloat _VP_inf_spot_attenuation;
 338
 339    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 340    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 341    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 342    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 343    GLfloat _dli;                /**< CI diffuse light intensity */
 344    GLfloat _sli;                /**< CI specular light intensity */
 345    /*@}*/
 346 };
 347
 348
 349 /**
 350  * Light model.
 351  */
 352 struct gl_lightmodel {
 353    GLfloat Ambient[4];          /**< ambient color */
 354    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 355    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 356    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 357                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 358 };
 359
 360
 361 /**
 362  * Material.
 363  */
 364 struct gl_material
 365 {
 366    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 367 };
 368
 369
 370 /**
 371  * Accumulation buffer attributes.
 372  */
 373 struct gl_accum_attrib {
 374    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 375 };
 376
 377
 378 /**
 379  * \name Clipping planes bits
 380  *
 381  * Used in gl_colorbuffer_attrib::_DrawDestMask and
 382  * gl_colorbuffer_attrib::_ReadSrcMask below to identify color buffers.
 383  */
 384 /*@{*/
 385 #define FRONT_LEFT_BIT  0x1
 386 #define FRONT_RIGHT_BIT 0x2
 387 #define BACK_LEFT_BIT   0x4
 388 #define BACK_RIGHT_BIT  0x8
 389 #define AUX0_BIT        0x10
 390 #define AUX1_BIT        0x20
 391 #define AUX2_BIT        0x40
 392 #define AUX3_BIT        0x80
 393 /*@}*/
 394
 395
 396 /**
 397  * Color buffers attributes.
 398  */
 399 struct gl_colorbuffer_attrib {
 400    GLuint ClearIndex;                   /**< Index to use for glClear */
 401    GLclampf ClearColor[4];              /**< Color to use for glClear */
 402
 403    GLuint IndexMask;                    /**< Color index write mask */
 404    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 405
 406    GLenum DrawBuffer;                   /**< Which buffer to draw into */
 407    GLubyte _DrawDestMask;               /**< bitwise-OR of FRONT/BACK_LEFT/RIGHT_BITs */
 408
 409    /**
 410     * \name alpha testing
 411     */
 412    /*@{*/
 413    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 414    GLenum AlphaFunc;                    /**< Alpha test function */
 415    GLclampf AlphaRef;                   /**< Alpha reference value */
 416    /*@}*/
 417
 418    /**
 419     * \name Blending
 420     */
 421    /*@{*/
 422    GLboolean BlendEnabled;              /**< Blending enabled flag */
 423    GLenum BlendSrcRGB;                  /**< Blending source operator */
 424    GLenum BlendDstRGB;                  /**< Blending destination operator */
 425    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 426    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 427    GLenum BlendEquation;                /**< Blending equation */
 428    GLfloat BlendColor[4];               /**< Blending color */
 429    /*@}*/
 430
 431    /**
 432     * \name Logic op
 433     */
 434    /*@{*/
 435    GLenum LogicOp;                      /**< Logic operator */
 436    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 437    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 438    /*@}*/
 439
 440    GLboolean DitherFlag;                /**< Dither enable flag */
 441 };
 442
 443
 444 /**
 445  * Current attributes.
 446  */
 447 struct gl_current_attrib {
 448    /**
 449     * \name Values valid only when FLUSH_VERTICES has been called.
 450     */
 451    /*@{*/
 452    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 453                                                   *  indexed by VERT_ATTRIB_* */
 454    GLuint Index;                                /**< Current color index */
 455    GLboolean EdgeFlag;                          /**< Current edge flag */
 456    /*@}*/
 457
 458    /**
 459     * \name Values are always valid.
 460     *
 461     * \note BTW, note how similar this set of attributes is to the SWvertex data type
 462     * in the software rasterizer...
 463     */
 464    /*@{*/
 465    GLfloat RasterPos[4];                        /**< Current raster position */
 466    GLfloat RasterDistance;                      /**< Current raster distance */
 467    GLfloat RasterColor[4];                      /**< Current raster color */
 468    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 469    GLuint RasterIndex;                          /**< Current raster index */
 470    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 471    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 472    /*@}*/
 473 };
 474
 475
 476 /**
 477  * Depth buffer attributes.
 478  */
 479 struct gl_depthbuffer_attrib {
 480    GLenum Func;                 /**< Function for depth buffer compare */
 481    GLfloat Clear;               /**< Value to clear depth buffer to */
 482    GLboolean Test;              /**< Depth buffering enabled flag */
 483    GLboolean Mask;              /**< Depth buffer writable? */
 484    GLboolean OcclusionTest;     /**< GL_HP_occlusion_test */
 485    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 486    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 487 };
 488
 489
 490 /**
 491  * glEnable()/glDisable() attributes.
 492  */
 493 struct gl_enable_attrib {
 494    GLboolean AlphaTest;
 495    GLboolean AutoNormal;
 496    GLboolean Blend;
 497    GLuint ClipPlanes;
 498    GLboolean ColorMaterial;
 499    GLboolean ColorTable;                /* SGI_color_table */
 500    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 501    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 502    GLboolean Convolution1D;
 503    GLboolean Convolution2D;
 504    GLboolean Separable2D;
 505    GLboolean CullFace;
 506    GLboolean DepthTest;
 507    GLboolean Dither;
 508    GLboolean Fog;
 509    GLboolean Histogram;
 510    GLboolean Light[MAX_LIGHTS];
 511    GLboolean Lighting;
 512    GLboolean LineSmooth;
 513    GLboolean LineStipple;
 514    GLboolean IndexLogicOp;
 515    GLboolean ColorLogicOp;
 516    GLboolean Map1Color4;
 517    GLboolean Map1Index;
 518    GLboolean Map1Normal;
 519    GLboolean Map1TextureCoord1;
 520    GLboolean Map1TextureCoord2;
 521    GLboolean Map1TextureCoord3;
 522    GLboolean Map1TextureCoord4;
 523    GLboolean Map1Vertex3;
 524    GLboolean Map1Vertex4;
 525    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 526    GLboolean Map2Color4;
 527    GLboolean Map2Index;
 528    GLboolean Map2Normal;
 529    GLboolean Map2TextureCoord1;
 530    GLboolean Map2TextureCoord2;
 531    GLboolean Map2TextureCoord3;
 532    GLboolean Map2TextureCoord4;
 533    GLboolean Map2Vertex3;
 534    GLboolean Map2Vertex4;
 535    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 536    GLboolean MinMax;
 537    GLboolean Normalize;
 538    GLboolean PixelTexture;
 539    GLboolean PointSmooth;
 540    GLboolean PolygonOffsetPoint;
 541    GLboolean PolygonOffsetLine;
 542    GLboolean PolygonOffsetFill;
 543    GLboolean PolygonSmooth;
 544    GLboolean PolygonStipple;
 545    GLboolean RescaleNormals;
 546    GLboolean Scissor;
 547    GLboolean Stencil;
 548    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 549    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 550    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 551    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 552    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 553    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 554    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 555    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 556    /* SGI_texture_color_table */
 557    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 558    /* GL_NV_vertex_program */
 559    GLboolean VertexProgram;
 560    GLboolean VertexProgramPointSize;
 561    GLboolean VertexProgramTwoSide;
 562    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 563    GLboolean PointSprite;
 564 };
 565
 566
 567 /**
 568  * Eval attributes.
 569  */
 570 struct gl_eval_attrib {
 571    /**
 572     * \name Enable bits
 573     */
 574    /*@{*/
 575    GLboolean Map1Color4;
 576    GLboolean Map1Index;
 577    GLboolean Map1Normal;
 578    GLboolean Map1TextureCoord1;
 579    GLboolean Map1TextureCoord2;
 580    GLboolean Map1TextureCoord3;
 581    GLboolean Map1TextureCoord4;
 582    GLboolean Map1Vertex3;
 583    GLboolean Map1Vertex4;
 584    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 585    GLboolean Map2Color4;
 586    GLboolean Map2Index;
 587    GLboolean Map2Normal;
 588    GLboolean Map2TextureCoord1;
 589    GLboolean Map2TextureCoord2;
 590    GLboolean Map2TextureCoord3;
 591    GLboolean Map2TextureCoord4;
 592    GLboolean Map2Vertex3;
 593    GLboolean Map2Vertex4;
 594    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 595    GLboolean AutoNormal;
 596    /*@}*/
 597
 598    /**
 599     * \name Map Grid endpoints and divisions and calculated du values
 600     */
 601    /*@{*/
 602    GLint MapGrid1un;
 603    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 604    GLint MapGrid2un, MapGrid2vn;
 605    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 606    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 607    /*@}*/
 608 };
 609
 610
 611 /**
 612  * Fog attributes.
 613  */
 614 struct gl_fog_attrib {
 615    GLboolean Enabled;           /**< Fog enabled flag */
 616    GLfloat Color[4];            /**< Fog color */
 617    GLfloat Density;             /**< Density >= 0.0 */
 618    GLfloat Start;               /**< Start distance in eye coords */
 619    GLfloat End;                 /**< End distance in eye coords */
 620    GLfloat Index;               /**< Fog index */
 621    GLenum Mode;                 /**< Fog mode */
 622    GLboolean ColorSumEnabled;
 623    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 624 };
 625
 626
 627 /**
 628  * Hint attributes.
 629  *
 630  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 631  */
 632 struct gl_hint_attrib {
 633    GLenum PerspectiveCorrection;
 634    GLenum PointSmooth;
 635    GLenum LineSmooth;
 636    GLenum PolygonSmooth;
 637    GLenum Fog;
 638    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 639    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 640    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 641 };
 642
 643
 644 /**
 645  * Histogram attributes.
 646  */
 647 struct gl_histogram_attrib {
 648    GLuint Width;                                /**< number of table entries */
 649    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 650    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 651    GLboolean Sink;                              /**< terminate image transfer? */
 652    GLubyte RedSize;                             /**< Bits per counter */
 653    GLubyte GreenSize;
 654    GLubyte BlueSize;
 655    GLubyte AlphaSize;
 656    GLubyte LuminanceSize;
 657 };
 658
 659
 660 struct gl_minmax_attrib {
 661    GLenum Format;
 662    GLboolean Sink;
 663    GLfloat Min[4], Max[4];   /**< RGBA */
 664 };
 665
 666
 667 struct gl_convolution_attrib {
 668    GLenum Format;
 669    GLenum InternalFormat;
 670    GLuint Width;
 671    GLuint Height;
 672    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 673 };
 674
 675
 676 #define LIGHT_SPOT         0x1
 677 #define LIGHT_LOCAL_VIEWER 0x2
 678 #define LIGHT_POSITIONAL   0x4
 679 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 680
 681 /**
 682  * Lighting attributes.
 683  */
 684 struct gl_light_attrib {
 685    struct gl_light Light[MAX_LIGHTS];   /**< Array of lights */
 686    struct gl_lightmodel Model;          /**< Lighting model */
 687
 688    /**
 689     * Must flush FLUSH_VERTICES before referencing:
 690     */
 691    /*@{*/
 692    struct gl_material Material;         /**< Includes front & back values */
 693    /*@}*/
 694
 695    GLboolean Enabled;                   /**< Lighting enabled flag */
 696    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 697    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 698    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 699    GLuint ColorMaterialBitmask;         /**< bitmask formed from Face and Mode */
 700    GLboolean ColorMaterialEnabled;
 701
 702    struct gl_light EnabledList;         /**< List sentinel */
 703
 704    /**
 705     * Derived for optimizations:
 706     */
 707    /*@{*/
 708    GLboolean _NeedEyeCoords;
 709    GLboolean _NeedVertices;             /**< Use fast shader? */
 710    GLuint  _Flags;                      /**< LIGHT_* flags, see above */
 711    GLfloat _BaseColor[2][3];
 712    /*@}*/
 713 };
 714
 715
 716 /**
 717  * Line attributes.
 718  */
 719 struct gl_line_attrib {
 720    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 721    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 722    GLushort StipplePattern;     /**< Stipple pattern */
 723    GLint StippleFactor;         /**< Stipple repeat factor */
 724    GLfloat Width;               /**< Line width */
 725    GLfloat _Width;              /**< Clamped Line width */
 726 };
 727
 728
 729 struct gl_list_attrib {
 730    GLuint ListBase;
 731 };
 732
 733
 734 struct gl_list_opcode {
 735    GLuint size;
 736    void (*execute)( GLcontext *ctx, void *data );
 737    void (*destroy)( GLcontext *ctx, void *data );
 738    void (*print)( GLcontext *ctx, void *data );
 739 };
 740
 741 #define GL_MAX_EXT_OPCODES 16
 742
 743 struct gl_list_extensions {
 744    struct gl_list_opcode opcode[GL_MAX_EXT_OPCODES];
 745    GLuint nr_opcodes;
 746 };
 747
 748
 749 struct gl_multisample_attrib {
 750    GLboolean Enabled;
 751    GLboolean SampleAlphaToCoverage;
 752    GLboolean SampleAlphaToOne;
 753    GLboolean SampleCoverage;
 754    GLfloat SampleCoverageValue;
 755    GLboolean SampleCoverageInvert;
 756 };
 757
 758
 759 /**
 760  * Pixel attributes.
 761  */
 762 struct gl_pixel_attrib {
 763    GLenum ReadBuffer;           /**< source buffer for glReadPixels()/glCopyPixels() */
 764    GLubyte _ReadSrcMask;        /**< Not really a mask, but like _DrawDestMask
 765                                   *
 766                                   * May be: FRONT_LEFT_BIT, BACK_LEFT_BIT,
 767                                   * FRONT_RIGHT_BIT or BACK_RIGHT_BIT. */
 768    GLfloat RedBias, RedScale;
 769    GLfloat GreenBias, GreenScale;
 770    GLfloat BlueBias, BlueScale;
 771    GLfloat AlphaBias, AlphaScale;
 772    GLfloat DepthBias, DepthScale;
 773    GLint IndexShift, IndexOffset;
 774    GLboolean MapColorFlag;
 775    GLboolean MapStencilFlag;
 776    GLfloat ZoomX, ZoomY;
 777    /* XXX move these out of gl_pixel_attrib */
 778    GLint MapStoSsize;           /**< Size of each pixel map */
 779    GLint MapItoIsize;
 780    GLint MapItoRsize;
 781    GLint MapItoGsize;
 782    GLint MapItoBsize;
 783    GLint MapItoAsize;
 784    GLint MapRtoRsize;
 785    GLint MapGtoGsize;
 786    GLint MapBtoBsize;
 787    GLint MapAtoAsize;
 788    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 789    GLint MapItoI[MAX_PIXEL_MAP_TABLE];
 790    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 791    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 792    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 793    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 794    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 795    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 796    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 797    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 798    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 799    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 800    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 801    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 802    /** GL_EXT_histogram */
 803    GLboolean HistogramEnabled;
 804    GLboolean MinMaxEnabled;
 805    /** GL_SGIS_pixel_texture */
 806    GLboolean PixelTextureEnabled;
 807    GLenum FragmentRgbSource;
 808    GLenum FragmentAlphaSource;
 809    /** GL_SGI_color_matrix */
 810    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 811    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 812    /** GL_SGI_color_table */
 813    GLfloat ColorTableScale[4];
 814    GLfloat ColorTableBias[4];
 815    GLboolean ColorTableEnabled;
 816    GLfloat PCCTscale[4];
 817    GLfloat PCCTbias[4];
 818    GLboolean PostConvolutionColorTableEnabled;
 819    GLfloat PCMCTscale[4];
 820    GLfloat PCMCTbias[4];
 821    GLboolean PostColorMatrixColorTableEnabled;
 822    /** GL_SGI_texture_color_table */
 823    GLfloat TextureColorTableScale[4];
 824    GLfloat TextureColorTableBias[4];
 825    /** Convolution */
 826    GLboolean Convolution1DEnabled;
 827    GLboolean Convolution2DEnabled;
 828    GLboolean Separable2DEnabled;
 829    GLfloat ConvolutionBorderColor[3][4];
 830    GLenum ConvolutionBorderMode[3];
 831    GLfloat ConvolutionFilterScale[3][4];
 832    GLfloat ConvolutionFilterBias[3][4];
 833    GLfloat PostConvolutionScale[4];  /**< RGBA */
 834    GLfloat PostConvolutionBias[4];   /**< RGBA */
 835 };
 836
 837
 838 /**
 839  * Point attributes.
 840  */
 841 struct gl_point_attrib {
 842    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 843    GLfloat Size;                /**< User-specified point size */
 844    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
 845    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 846    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 847    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 848    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 849    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
 850    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV_point_sprite / GL_NV_point_sprite */
 851    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 852 };
 853
 854
 855 /**
 856  * Polygon attributes.
 857  */
 858 struct gl_polygon_attrib {
 859    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
 860    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
 861    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
 862    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
 863    GLboolean CullFlag;          /**< Culling on/off flag */
 864    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
 865    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
 866    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
 867    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
 868    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
 869    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
 870    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
 871    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
 872 };
 873
 874
 875 /**
 876  * Scissor attributes.
 877  */
 878 struct gl_scissor_attrib {
 879    GLboolean Enabled;           /**< Scissor test enabled? */
 880    GLint X, Y;                  /**< Lower left corner of box */
 881    GLsizei Width, Height;       /**< Size of box */
 882 };
 883
 884
 885 /**
 886  * Stencil attributes.
 887  */
 888 struct gl_stencil_attrib {
 889    GLboolean Enabled;           /**< Enabled flag */
 890    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
 891    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
 892    GLenum Function[2];          /**< Stencil function */
 893    GLenum FailFunc[2];          /**< Fail function */
 894    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
 895    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
 896    GLstencil Ref[2];            /**< Reference value */
 897    GLstencil ValueMask[2];      /**< Value mask */
 898    GLstencil WriteMask[2];      /**< Write mask */
 899    GLstencil Clear;             /**< Clear value */
 900 };
 901
 902
 903 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
 904
 905 #define TEXTURE_1D_INDEX    0
 906 #define TEXTURE_2D_INDEX    1
 907 #define TEXTURE_3D_INDEX    2
 908 #define TEXTURE_CUBE_INDEX  3
 909 #define TEXTURE_RECT_INDEX  4
 910
 911 /* Texture.Unit[]._ReallyEnabled flags: */
 912 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
 913 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
 914 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
 915 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
 916 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
 917
 918
 919 /* TexGenEnabled flags */
 920 #define S_BIT 1
 921 #define T_BIT 2
 922 #define R_BIT 4
 923 #define Q_BIT 8
 924
 925 /* Bitmap versions of the GL_ constants. */
 926 #define TEXGEN_SPHERE_MAP        0x1
 927 #define TEXGEN_OBJ_LINEAR        0x2
 928 #define TEXGEN_EYE_LINEAR        0x4
 929 #define TEXGEN_REFLECTION_MAP_NV 0x8
 930 #define TEXGEN_NORMAL_MAP_NV     0x10
 931
 932 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
 933                                   TEXGEN_REFLECTION_MAP_NV | \
 934                                   TEXGEN_NORMAL_MAP_NV)
 935 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
 936                                   TEXGEN_REFLECTION_MAP_NV | \
 937                                   TEXGEN_NORMAL_MAP_NV     | \
 938                                   TEXGEN_EYE_LINEAR)
 939
 940 /* A selection of state flags to make driver and module's lives easier. */
 941 #define ENABLE_TEXGEN0        0x1
 942 #define ENABLE_TEXGEN1        0x2
 943 #define ENABLE_TEXGEN2        0x4
 944 #define ENABLE_TEXGEN3        0x8
 945 #define ENABLE_TEXGEN4        0x10
 946 #define ENABLE_TEXGEN5        0x20
 947 #define ENABLE_TEXGEN6        0x40
 948 #define ENABLE_TEXGEN7        0x80
 949
 950 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
 951 #define ENABLE_TEXMAT1        0x2
 952 #define ENABLE_TEXMAT2        0x4
 953 #define ENABLE_TEXMAT3        0x8
 954 #define ENABLE_TEXMAT4        0x10
 955 #define ENABLE_TEXMAT5        0x20
 956 #define ENABLE_TEXMAT6        0x40
 957 #define ENABLE_TEXMAT7        0x80
 958
 959 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
 960 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
 961
 962 /**
 963  * Texel fetch function prototype.
 964  *
 965  * \param texImage texture image.
 966  * \param col texel column.
 967  * \param row texel row.
 968  * \param img texel level.
 969  * \param texelOut output texel. If \p texImage is color-index, \p texelOut
 970  * returns <tt>GLchan[1]</tt>.  If \p texImage is depth, \p texelOut returns
 971  * <tt>GLfloat[1]</tt>.  Otherwise, \p texelOut returns <tt>GLchan[4]</tt>.
 972  */
 973 typedef void (*FetchTexelFunc)( const struct gl_texture_image *texImage,
 974                                 GLint col, GLint row, GLint img,
 975                                 GLvoid *texelOut );
 976
 977 /**
 978  * Texture format record
 979  */
 980 struct gl_texture_format {
 981    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
 982
 983    GLenum BaseFormat;           /**< Either GL_ALPHA, GL_INTENSITY, GL_LUMINANCE,
 984                                  *   GL_LUMINANCE_ALPHA, GL_RGB, GL_RGBA,
 985                                  *   GL_COLOR_INDEX or GL_DEPTH_COMPONENT.
 986                                  */
 987    GLubyte RedBits;             /**< Bits per texel component */
 988    GLubyte GreenBits;           /**< These are just rough approximations for */
 989    GLubyte BlueBits;            /**< compressed texture formats. */
 990    GLubyte AlphaBits;
 991    GLubyte LuminanceBits;
 992    GLubyte IntensityBits;
 993    GLubyte IndexBits;
 994    GLubyte DepthBits;
 995
 996    GLint TexelBytes;            /**< Bytes per texel (0 for compressed formats */
 997
 998    /**
 999     * \name Texel fetch function pointers
1000     */
1001    /*@{*/
1002    FetchTexelFunc FetchTexel1D;
1003    FetchTexelFunc FetchTexel2D;
1004    FetchTexelFunc FetchTexel3D;
1005    /*@}*/
1006 };
1007
1008
1009 /**
1010  * Texture image record
1011  */
1012 struct gl_texture_image {
1013    GLenum Format;               /**< GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1014                                  *    GL_INTENSITY, GL_RGB, GL_RGBA,
1015                                  *    GL_COLOR_INDEX or GL_DEPTH_COMPONENT only.
1016                                  *    Used for choosing TexEnv arithmetic.
1017                                  */
1018    GLint IntFormat;             /**< Internal format as given by the user */
1019    GLuint Border;               /**< 0 or 1 */
1020    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1021    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1022    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1023    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1024    GLuint Width2;               /**< = Width - 2*Border */
1025    GLuint Height2;              /**< = Height - 2*Border */
1026    GLuint Depth2;               /**< = Depth - 2*Border */
1027    GLuint WidthLog2;            /**< = log2(Width2) */
1028    GLuint HeightLog2;           /**< = log2(Height2) */
1029    GLuint DepthLog2;            /**< = log2(Depth2) */
1030    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1031    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1032    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1033    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1034    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1035    GLboolean IsClientData;      /**< Data owned by client? */
1036    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1037
1038    const struct gl_texture_format *TexFormat;
1039
1040    FetchTexelFunc FetchTexel;   /**< Texel fetch function pointer */
1041
1042    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1043    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1044
1045    /**
1046     * \name For device driver:
1047     */
1048    /*@{*/
1049    void *DriverData;            /**< Arbitrary device driver data */
1050    /*@}*/
1051 };
1052
1053
1054 /**
1055  * Texture object record
1056  */
1057 struct gl_texture_object {
1058    _glthread_Mutex Mutex;       /**< for thread safety */
1059    GLint RefCount;              /**< reference count */
1060    GLuint Name;                 /**< an unsigned integer */
1061    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1062    GLfloat Priority;            /**< in [0,1] */
1063    GLfloat BorderColor[4];      /**< unclamped */
1064    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1065    /** \name Wrap modes
1066     * Are GL_CLAMP, REPEAT, GL_CLAMP_TO_EDGE, and GL_CLAMP_TO_BORDER_ARB. */
1067    /*@{*/
1068    GLenum WrapS;
1069    GLenum WrapT;
1070    GLenum WrapR;
1071    /*@}*/
1072    GLenum MinFilter;            /**< minification filter */
1073    GLenum MagFilter;            /**< magnification filter */
1074    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1075    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1076    GLfloat LodBias;             /**< OpenGL 1.4 */
1077    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1078    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1079    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1080    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1081    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1082    GLfloat ShadowAmbient;
1083    GLenum CompareMode;          /**< GL_ARB_shadow */
1084    GLenum CompareFunc;          /**< GL_ARB_shadow */
1085    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1086    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1087    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1088    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1089    GLboolean _IsPowerOfTwo;     /**< Are all image dimensions powers of two? */
1090
1091    struct gl_texture_image *Image[MAX_TEXTURE_LEVELS];
1092
1093    /**
1094     * \name Texture cube faces
1095     *
1096     * Image[] is alias for *PosX[MAX_TEXTURE_LEVELS];
1097     */
1098    /*@{*/
1099    struct gl_texture_image *NegX[MAX_TEXTURE_LEVELS];
1100    struct gl_texture_image *PosY[MAX_TEXTURE_LEVELS];
1101    struct gl_texture_image *NegY[MAX_TEXTURE_LEVELS];
1102    struct gl_texture_image *PosZ[MAX_TEXTURE_LEVELS];
1103    struct gl_texture_image *NegZ[MAX_TEXTURE_LEVELS];
1104    /*@}*/
1105
1106    /** GL_EXT_paletted_texture */
1107    struct gl_color_table Palette;
1108
1109    GLboolean Complete;                  /**< Is texture object complete? */
1110    struct gl_texture_object *Next;      /**< Next in linked list */
1111
1112    /**
1113     * \name For device driver
1114     */
1115    /*@{*/
1116    void *DriverData;    /**< Arbitrary device driver data */
1117    /*@}*/
1118 };
1119
1120
1121 /**
1122  * Texture unit record
1123  */
1124 struct gl_texture_unit {
1125    GLuint Enabled;              /**< bitmask of TEXTURE_*_BIT flags */
1126    GLuint _ReallyEnabled;       /**< 0 or exactly one of TEXTURE_*_BIT flags */
1127
1128    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1129    GLfloat EnvColor[4];
1130    GLuint TexGenEnabled;        /**< Bitwise-OR of [STRQ]_BIT values */
1131    /** \name Tex coord generation mode
1132     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1133    /*@{*/
1134    GLenum GenModeS;
1135    GLenum GenModeT;
1136    GLenum GenModeR;
1137    GLenum GenModeQ;
1138    /*@}*/
1139    GLuint _GenBitS;
1140    GLuint _GenBitT;
1141    GLuint _GenBitR;
1142    GLuint _GenBitQ;
1143    GLuint _GenFlags;            /**< bitwise or of GenBit[STRQ] */
1144    GLfloat ObjectPlaneS[4];
1145    GLfloat ObjectPlaneT[4];
1146    GLfloat ObjectPlaneR[4];
1147    GLfloat ObjectPlaneQ[4];
1148    GLfloat EyePlaneS[4];
1149    GLfloat EyePlaneT[4];
1150    GLfloat EyePlaneR[4];
1151    GLfloat EyePlaneQ[4];
1152    GLfloat LodBias;             /**< for biasing mipmap levels */
1153
1154    /**
1155     * \name GL_EXT_texture_env_combine
1156     */
1157    /*@{*/
1158    GLenum CombineModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1159    GLenum CombineModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1160    GLenum CombineSourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1161    GLenum CombineSourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1162    GLenum CombineOperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1163    GLenum CombineOperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1164    GLuint CombineScaleShiftRGB; /**< 0, 1 or 2 */
1165    GLuint CombineScaleShiftA;   /**< 0, 1 or 2 */
1166    /*@}*/
1167
1168    struct gl_texture_object *Current1D;
1169    struct gl_texture_object *Current2D;
1170    struct gl_texture_object *Current3D;
1171    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1172    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1173
1174    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1175
1176    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1177    struct gl_texture_object Saved2D;
1178    struct gl_texture_object Saved3D;
1179    struct gl_texture_object SavedCubeMap;
1180    struct gl_texture_object SavedRect;
1181
1182    /* GL_SGI_texture_color_table */
1183    struct gl_color_table ColorTable;
1184    struct gl_color_table ProxyColorTable;
1185    GLboolean ColorTableEnabled;
1186 };
1187
1188
1189 /**
1190  * Texture attributes
1191  */
1192 struct gl_texture_attrib {
1193    /**
1194     * name multitexture
1195     */
1196    /**@{*/
1197    GLuint CurrentUnit;          /**< Active texture unit */
1198    GLuint _EnabledUnits;        /**< one bit set for each really-enabled unit */
1199    GLuint _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1200    GLuint _GenFlags;            /**< for texgen */
1201    GLuint _TexGenEnabled;
1202    GLuint _TexMatEnabled;
1203    /**@}*/
1204
1205    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1206
1207    struct gl_texture_object *Proxy1D;
1208    struct gl_texture_object *Proxy2D;
1209    struct gl_texture_object *Proxy3D;
1210    struct gl_texture_object *ProxyCubeMap;
1211    struct gl_texture_object *ProxyRect;
1212
1213    /** GL_EXT_shared_texture_palette */
1214    GLboolean SharedPalette;
1215    struct gl_color_table Palette;
1216 };
1217
1218
1219 /**
1220  * Transformation attributes.
1221  */
1222 struct gl_transform_attrib {
1223    GLenum MatrixMode;                           /**< Matrix mode */
1224    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1225    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1226    GLuint ClipPlanesEnabled;                    /**< on/off bitmask */
1227    GLboolean Normalize;                         /**< Normalize all normals? */
1228    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1229    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1230 };
1231
1232
1233 /**
1234  * Viewport attributes.
1235  */
1236 struct gl_viewport_attrib {
1237    GLint X, Y;                  /**< position */
1238    GLsizei Width, Height;       /**< size */
1239    GLfloat Near, Far;           /**< Depth buffer range */
1240    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1241 };
1242
1243
1244 /**
1245  * Node for the attribute stack
1246  */
1247 struct gl_attrib_node {
1248    GLbitfield kind;
1249    void *data;
1250    struct gl_attrib_node *next;
1251 };
1252
1253
1254 /**
1255  * Client pixel packing/unpacking attributes
1256  */
1257 struct gl_pixelstore_attrib {
1258    GLint Alignment;
1259    GLint RowLength;
1260    GLint SkipPixels;
1261    GLint SkipRows;
1262    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1263    GLint SkipImages;      /**< for GL_EXT_texture3D */
1264    GLboolean SwapBytes;
1265    GLboolean LsbFirst;
1266    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1267    GLboolean Invert;        /**< GL_MESA_pack_invert */
1268 };
1269
1270
1271 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1272
1273
1274 /**
1275  * Client vertex array attributes
1276  */
1277 struct gl_client_array {
1278    GLint Size;
1279    GLenum Type;
1280    GLsizei Stride;              /**< user-specified stride */
1281    GLsizei StrideB;             /**< actual stride in bytes */
1282    void *Ptr;
1283    GLuint Flags;
1284    GLuint Enabled;              /**< one of the _NEW_ARRAY_ bits */
1285    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1286    GLuint BufferBinding;        /**< GL_ARB_vertex_buffer_object */
1287 };
1288
1289
1290 /**
1291  * Array attributes.
1292  */
1293 struct gl_array_attrib {
1294    struct gl_client_array Vertex;            /**< client data descriptors */
1295    struct gl_client_array Normal;
1296    struct gl_client_array Color;
1297    struct gl_client_array SecondaryColor;
1298    struct gl_client_array FogCoord;
1299    struct gl_client_array Index;
1300    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1301    struct gl_client_array EdgeFlag;
1302
1303    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1304
1305    GLint TexCoordInterleaveFactor;
1306    GLint ActiveTexture;         /**< Client Active Texture */
1307    GLuint LockFirst;
1308    GLuint LockCount;
1309
1310    GLuint _Enabled;             /**< _NEW_ARRAY_* - bit set if array enabled */
1311    GLuint NewState;             /**< _NEW_ARRAY_* */
1312
1313    /* GL_ARB_vertex_buffer_object */
1314    GLuint ArrayBufferBinding;
1315    GLuint ElementArrayBufferBinding;
1316 };
1317
1318
1319 struct gl_feedback {
1320    GLenum Type;
1321    GLuint _Mask;                /* FB_* bits */
1322    GLfloat *Buffer;
1323    GLuint BufferSize;
1324    GLuint Count;
1325 };
1326
1327
1328 /**
1329  * Selection attributes.
1330  */
1331 struct gl_selection {
1332    GLuint *Buffer;      /**< selection buffer */
1333    GLuint BufferSize;   /**< size of the selection buffer */
1334    GLuint BufferCount;  /**< number of values in the selection buffer */
1335    GLuint Hits;         /**< number of records in the selection buffer */
1336    GLuint NameStackDepth; /**< name stack depth */
1337    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1338    GLboolean HitFlag;   /**< hit flag */
1339    GLfloat HitMinZ;     /**< minimum hit depth */
1340    GLfloat HitMaxZ;     /**< maximum hit depth */
1341 };
1342
1343
1344 /**
1345  * 1-D Evaluator control points
1346  */
1347 struct gl_1d_map
1348 {
1349    GLuint Order;        /**< Number of control points */
1350    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1351    GLfloat *Points;     /**< Points to contiguous control points */
1352 };
1353
1354
1355 /**
1356  * 2-D Evaluator control points
1357  */
1358 struct gl_2d_map
1359 {
1360    GLuint Uorder;               /**< Number of control points in U dimension */
1361    GLuint Vorder;               /**< Number of control points in V dimension */
1362    GLfloat u1, u2, du;
1363    GLfloat v1, v2, dv;
1364    GLfloat *Points;             /**< Points to contiguous control points */
1365 };
1366
1367
1368 /**
1369  * All evaluator control points
1370  */
1371 struct gl_evaluators
1372 {
1373    /**
1374     * \name 1-D maps
1375     */
1376    /*@{*/
1377    struct gl_1d_map Map1Vertex3;
1378    struct gl_1d_map Map1Vertex4;
1379    struct gl_1d_map Map1Index;
1380    struct gl_1d_map Map1Color4;
1381    struct gl_1d_map Map1Normal;
1382    struct gl_1d_map Map1Texture1;
1383    struct gl_1d_map Map1Texture2;
1384    struct gl_1d_map Map1Texture3;
1385    struct gl_1d_map Map1Texture4;
1386    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1387    /*@}*/
1388
1389    /**
1390     * \name 2-D maps
1391     */
1392    /*@{*/
1393    struct gl_2d_map Map2Vertex3;
1394    struct gl_2d_map Map2Vertex4;
1395    struct gl_2d_map Map2Index;
1396    struct gl_2d_map Map2Color4;
1397    struct gl_2d_map Map2Normal;
1398    struct gl_2d_map Map2Texture1;
1399    struct gl_2d_map Map2Texture2;
1400    struct gl_2d_map Map2Texture3;
1401    struct gl_2d_map Map2Texture4;
1402    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1403    /*@}*/
1404 };
1405
1406
1407 /**
1408  * NV_fragment_program runtime state
1409  */
1410 struct fp_machine
1411 {
1412    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1413    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1414    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1415    GLuint CondCodes[4];
1416 };
1417
1418
1419 /**
1420  * Names of the various vertex/fragment register files
1421  */
1422 enum register_file
1423 {
1424    PROGRAM_TEMPORARY = 10,
1425    PROGRAM_INPUT,
1426    PROGRAM_OUTPUT,
1427    PROGRAM_LOCAL_PARAM,
1428    PROGRAM_ENV_PARAM,
1429    PROGRAM_NAMED_PARAM,
1430    PROGRAM_STATE_VAR,
1431    PROGRAM_WRITE_ONLY
1432 };
1433
1434
1435 /* Vertex and fragment instructions */
1436 struct vp_instruction;
1437 struct fp_instruction;
1438
1439 struct program_parameter_list;
1440
1441
1442 /**
1443  * Base class for any kind of program object
1444  */
1445 struct program
1446 {
1447    GLuint Id;
1448    GLubyte *String;    /* Null-terminated program text */
1449    GLenum Target;
1450    GLenum Format;      /* String encoding format */
1451    GLint RefCount;
1452    GLboolean Resident;
1453    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1454    GLuint NumInstructions;  /* GL_ARB_vertex/fragment_program */
1455    GLuint NumTemporaries;
1456    GLuint NumParameters;
1457    GLuint NumAttributes;
1458    GLuint NumAddressRegs;
1459 };
1460
1461
1462 /** Vertex program object */
1463 struct vertex_program
1464 {
1465    struct program Base;   /* base class */
1466    struct vp_instruction *Instructions;  /* Compiled instructions */
1467    GLboolean IsPositionInvariant;  /* GL_NV_vertex_program1_1 */
1468    GLuint InputsRead;     /* Bitmask of which input regs are read */
1469    GLuint OutputsWritten; /* Bitmask of which output regs are written to */
1470 };
1471
1472
1473 /** Fragment program object */
1474 struct fragment_program
1475 {
1476    struct program Base;   /**< base class */
1477    struct fp_instruction *Instructions;  /**< Compiled instructions */
1478    GLuint InputsRead;     /**< Bitmask of which input regs are read */
1479    GLuint OutputsWritten; /**< Bitmask of which output regs are written to */
1480    GLuint TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_INDEX bitmask */
1481    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1482    GLuint NumTexInstructions;
1483    GLuint NumTexIndirections;
1484    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1485 };
1486
1487
1488 /**
1489  * State common to vertex and fragment programs.
1490  */
1491 struct program_state {
1492    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_NV */
1493    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_NV */
1494 };
1495
1496
1497 /**
1498  * State vars for GL_NV_vertex_program
1499  */
1500 struct vertex_program_state
1501 {
1502    GLboolean Enabled;                    /**< GL_VERTEX_PROGRAM_NV */
1503    GLboolean PointSizeEnabled;           /**< GL_VERTEX_PROGRAM_POINT_SIZE_NV */
1504    GLboolean TwoSideEnabled;             /**< GL_VERTEX_PROGRAM_TWO_SIDE_NV */
1505    struct vertex_program *Current;       /**< ptr to currently bound program */
1506
1507    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1508    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1509
1510    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1511    /* Only used during program execution (may be moved someday): */
1512    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1513    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1514    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1515    GLint AddressReg[4];
1516
1517 #if FEATURE_MESA_program_debug
1518    GLprogramcallbackMESA Callback;
1519    GLvoid *CallbackData;
1520    GLboolean CallbackEnabled;
1521    GLuint CurrentPosition;
1522 #endif
1523 };
1524
1525
1526 /*
1527  * State for GL_ARB/NV_fragment_program
1528  */
1529 struct fragment_program_state
1530 {
1531    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1532    struct fragment_program *Current;     /* ptr to currently bound program */
1533    struct fp_machine Machine;            /* machine state */
1534    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1535
1536 #if FEATURE_MESA_program_debug
1537    GLprogramcallbackMESA Callback;
1538    GLvoid *CallbackData;
1539    GLboolean CallbackEnabled;
1540    GLuint CurrentPosition;
1541 #endif
1542 };
1543
1544
1545 /*
1546  * State for GL_ARB_occlusion_query
1547  */
1548 struct occlusion_state
1549 {
1550    GLboolean Active;
1551    GLuint CurrentQueryObject;
1552    GLuint PassedCounter;
1553    struct _mesa_HashTable *QueryObjects;
1554 };
1555
1556
1557 /**
1558  * State which can be shared by multiple contexts:
1559  */
1560 struct gl_shared_state
1561 {
1562    _glthread_Mutex Mutex;                  /**< for thread safety */
1563    GLint RefCount;                         /**< Reference count */
1564    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
1565    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
1566    struct gl_texture_object *TexObjectList;/**< Linked list of texture objects */
1567
1568    /**
1569     * \name Default texture objects (shared by all multi-texture units)
1570     */
1571    /*@{*/
1572    struct gl_texture_object *Default1D;
1573    struct gl_texture_object *Default2D;
1574    struct gl_texture_object *Default3D;
1575    struct gl_texture_object *DefaultCubeMap;
1576    struct gl_texture_object *DefaultRect;
1577    /*@}*/
1578
1579    /**
1580     * \name GL_NV_vertex/_program
1581     */
1582    /*@{*/
1583    struct _mesa_HashTable *Programs;
1584 #if FEATURE_ARB_vertex_program
1585    struct program *DefaultVertexProgram;
1586 #endif
1587 #if FEATURE_ARB_fragment_program
1588    struct program *DefaultFragmentProgram;
1589 #endif
1590    /*@}*/
1591
1592    /** GL_ARB_vertex_buffer_objects */
1593    struct _mesa_HashTable *BufferObjects;
1594
1595    void *DriverData;  /**< Device driver shared state */
1596 };
1597
1598
1599 /**
1600  * Frame buffer.
1601  *
1602  * A "frame buffer" is a color buffer and its optional ancillary buffers:
1603  * depth, accum, stencil, and software-simulated alpha buffers.
1604  * In C++ terms, think of this as a base class from which device drivers
1605  * will make derived classes.
1606  */
1607 struct gl_frame_buffer
1608 {
1609    GLvisual Visual;             /**< The corresponding visual */
1610
1611    GLuint Width, Height;        /**< size of frame buffer in pixels */
1612
1613    GLboolean UseSoftwareDepthBuffer;
1614    GLboolean UseSoftwareAccumBuffer;
1615    GLboolean UseSoftwareStencilBuffer;
1616    GLboolean UseSoftwareAlphaBuffers;
1617
1618    /** \name Software depth (aka Z) buffer */
1619    /*@{*/
1620    GLvoid *DepthBuffer;         /**< array [Width*Height] of GLushort or GLuint*/
1621    /*@}*/
1622
1623    /** \name Software stencil buffer */
1624    /*@{*/
1625    GLstencil *Stencil;          /**< array [Width*Height] of GLstencil values */
1626    /*@}*/
1627
1628    /** \name Software accumulation buffer */
1629    /*@{*/
1630    GLaccum *Accum;              /**< array [4*Width*Height] of GLaccum values */
1631    /*@}*/
1632
1633    /** \name Software alpha planes */
1634    /*@{*/
1635    GLvoid *FrontLeftAlpha;      /**< array [Width*Height] of GLubyte */
1636    GLvoid *BackLeftAlpha;       /**< array [Width*Height] of GLubyte */
1637    GLvoid *FrontRightAlpha;     /**< array [Width*Height] of GLubyte */
1638    GLvoid *BackRightAlpha;      /**< array [Width*Height] of GLubyte */
1639    /*@}*/
1640
1641    /**
1642     * \name Drawing bounds
1643     *
1644     * Intersection of window size and scissor box
1645     */
1646    /*@{*/
1647    GLint _Xmin;  /**< inclusive */
1648    GLint _Ymin;  /**< inclusive */
1649    GLint _Xmax;  /**< exclusive */
1650    GLint _Ymax;  /**< exclusive */
1651    /*@}*/
1652 };
1653
1654
1655 /**
1656  * Constants which may be overridden by device driver during context creation
1657  * but are never changed after that.
1658  */
1659 struct gl_constants
1660 {
1661    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
1662    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
1663    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
1664    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
1665    GLuint MaxTextureCoordUnits;
1666    GLuint MaxTextureImageUnits;
1667    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
1668    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
1669    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
1670    GLuint MaxArrayLockSize;
1671    GLint SubPixelBits;
1672    GLfloat MinPointSize, MaxPointSize;          /* aliased */
1673    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
1674    GLfloat PointSizeGranularity;
1675    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
1676    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
1677    GLfloat LineWidthGranularity;
1678    GLuint NumAuxBuffers;
1679    GLuint MaxColorTableSize;
1680    GLuint MaxConvolutionWidth;
1681    GLuint MaxConvolutionHeight;
1682    GLuint MaxClipPlanes;
1683    GLuint MaxLights;
1684    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
1685    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
1686    /* GL_ARB_vertex_program */
1687    GLuint MaxVertexProgramInstructions;
1688    GLuint MaxVertexProgramAttribs;
1689    GLuint MaxVertexProgramTemps;
1690    GLuint MaxVertexProgramLocalParams;
1691    GLuint MaxVertexProgramEnvParams;
1692    GLuint MaxVertexProgramAddressRegs;
1693    /* GL_ARB_fragment_program */
1694    GLuint MaxFragmentProgramInstructions;
1695    GLuint MaxFragmentProgramAttribs;
1696    GLuint MaxFragmentProgramTemps;
1697    GLuint MaxFragmentProgramLocalParams;
1698    GLuint MaxFragmentProgramEnvParams;
1699    GLuint MaxFragmentProgramAddressRegs;
1700    GLuint MaxFragmentProgramAluInstructions;
1701    GLuint MaxFragmentProgramTexInstructions;
1702    GLuint MaxFragmentProgramTexIndirections;
1703    /* vertex or fragment program */
1704    GLuint MaxProgramMatrices;
1705    GLuint MaxProgramMatrixStackDepth;
1706 };
1707
1708
1709 /**
1710  * List of extensions.
1711  */
1712 struct gl_extensions
1713 {
1714    /**
1715     * \name Flags to quickly test if certain extensions are available.
1716     *
1717     * Not every extension needs to have such a flag, but it's encouraged.
1718     */
1719    /*@{*/
1720    GLboolean dummy;  /* don't remove this! */
1721    GLboolean ARB_depth_texture;
1722    GLboolean ARB_fragment_program;
1723    GLboolean ARB_imaging;
1724    GLboolean ARB_multisample;
1725    GLboolean ARB_multitexture;
1726    GLboolean ARB_occlusion_query;
1727    GLboolean ARB_point_sprite;
1728    GLboolean ARB_shadow;
1729    GLboolean ARB_texture_border_clamp;
1730    GLboolean ARB_texture_compression;
1731    GLboolean ARB_texture_cube_map;
1732    GLboolean ARB_texture_env_combine;
1733    GLboolean ARB_texture_env_crossbar;
1734    GLboolean ARB_texture_env_dot3;
1735    GLboolean ARB_texture_mirrored_repeat;
1736    GLboolean ARB_texture_non_power_of_two;
1737    GLboolean ARB_vertex_buffer_object;
1738    GLboolean ARB_vertex_program;
1739    GLboolean ARB_window_pos;
1740    GLboolean ATI_texture_mirror_once;
1741    GLboolean ATI_texture_env_combine3;
1742    GLboolean EXT_blend_color;
1743    GLboolean EXT_blend_func_separate;
1744    GLboolean EXT_blend_logic_op;
1745    GLboolean EXT_blend_minmax;
1746    GLboolean EXT_blend_subtract;
1747    GLboolean EXT_convolution;
1748    GLboolean EXT_compiled_vertex_array;
1749    GLboolean EXT_depth_bounds_test;
1750    GLboolean EXT_fog_coord;
1751    GLboolean EXT_histogram;
1752    GLboolean EXT_multi_draw_arrays;
1753    GLboolean EXT_paletted_texture;
1754    GLboolean EXT_point_parameters;
1755    GLboolean EXT_shadow_funcs;
1756    GLboolean EXT_secondary_color;
1757    GLboolean EXT_shared_texture_palette;
1758    GLboolean EXT_stencil_wrap;
1759    GLboolean EXT_stencil_two_side;
1760    GLboolean EXT_texture3D;
1761    GLboolean EXT_texture_compression_s3tc;
1762    GLboolean EXT_texture_env_add;
1763    GLboolean EXT_texture_env_combine;
1764    GLboolean EXT_texture_env_dot3;
1765    GLboolean EXT_texture_filter_anisotropic;
1766    GLboolean EXT_texture_lod_bias;
1767    GLboolean EXT_texture_mirror_clamp;
1768    GLboolean EXT_vertex_array_set;
1769    GLboolean HP_occlusion_test;
1770    GLboolean IBM_rasterpos_clip;
1771    GLboolean IBM_multimode_draw_arrays;
1772    GLboolean MESA_pack_invert;
1773    GLboolean MESA_packed_depth_stencil;
1774    GLboolean MESA_program_debug;
1775    GLboolean MESA_resize_buffers;
1776    GLboolean MESA_ycbcr_texture;
1777    GLboolean NV_blend_square;
1778    GLboolean NV_fragment_program;
1779    GLboolean NV_point_sprite;
1780    GLboolean NV_texture_rectangle;
1781    GLboolean NV_vertex_program;
1782    GLboolean NV_vertex_program1_1;
1783    GLboolean SGI_color_matrix;
1784    GLboolean SGI_color_table;
1785    GLboolean SGI_texture_color_table;
1786    GLboolean SGIS_generate_mipmap;
1787    GLboolean SGIS_pixel_texture;
1788    GLboolean SGIS_texture_edge_clamp;
1789    GLboolean SGIX_depth_texture;
1790    GLboolean SGIX_pixel_texture;
1791    GLboolean SGIX_shadow;
1792    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
1793    GLboolean TDFX_texture_compression_FXT1;
1794    GLboolean APPLE_client_storage;
1795    /*@}*/
1796    /* The extension string */
1797    const GLubyte *String;
1798 };
1799
1800
1801 /**
1802  * A stack of matrices (projection, modelview, color, texture, etc).
1803  */
1804 struct matrix_stack
1805 {
1806    GLmatrix *Top;      /**< points into Stack */
1807    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
1808    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
1809    GLuint MaxDepth;    /**< size of Stack[] array */
1810    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
1811 };
1812
1813
1814 /**
1815  * \name Bits for image transfer operations
1816  *
1817  * \sa __GLcontextRec::ImageTransferState.
1818  */
1819 /*@{*/
1820 #define IMAGE_SCALE_BIAS_BIT                      0x1
1821 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
1822 #define IMAGE_MAP_COLOR_BIT                       0x4
1823 #define IMAGE_COLOR_TABLE_BIT                     0x8
1824 #define IMAGE_CONVOLUTION_BIT                     0x10
1825 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
1826 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
1827 #define IMAGE_COLOR_MATRIX_BIT                    0x80
1828 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
1829 #define IMAGE_HISTOGRAM_BIT                       0x200
1830 #define IMAGE_MIN_MAX_BIT                         0x400
1831
1832 /** Transfer ops up to convolution */
1833 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
1834                                     IMAGE_SHIFT_OFFSET_BIT |   \
1835                                     IMAGE_MAP_COLOR_BIT |      \
1836                                     IMAGE_COLOR_TABLE_BIT)
1837
1838 /** Transfer ops after convolution */
1839 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
1840                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
1841                                      IMAGE_COLOR_MATRIX_BIT |                 \
1842                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
1843                                      IMAGE_HISTOGRAM_BIT |                    \
1844                                      IMAGE_MIN_MAX_BIT)
1845 /*@}*/
1846
1847
1848 /**
1849  * \name Bits to indicate what state has changed.
1850  *
1851  * 6 unused flags.
1852  */
1853 /*@{*/
1854 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
1855 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
1856 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
1857 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
1858 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
1859 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
1860 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
1861 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
1862 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
1863 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
1864 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
1865 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
1866 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
1867 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
1868 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
1869 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
1870 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
1871 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
1872 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
1873 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
1874 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
1875 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
1876 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
1877 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
1878 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
1879 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
1880 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
1881 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
1882 #define _NEW_ALL ~0
1883 /*@}*/
1884
1885
1886 /**
1887  * \name Bits to track array state changes
1888  *
1889  * Also used to summarize array enabled.
1890  */
1891 /*@{*/
1892 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
1893 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
1894 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
1895 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
1896 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
1897 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
1898 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
1899 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
1900 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
1901 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
1902 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
1903 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
1904 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
1905 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
1906 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
1907 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
1908 #define _NEW_ARRAY_ATTRIB_0         0x1  /* alias conventional arrays */
1909 #define _NEW_ARRAY_ALL              0xffffffff
1910
1911
1912 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
1913 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
1914 /*@}*/
1915
1916
1917 /**
1918  * \name A bunch of flags that we think might be useful to drivers.
1919  *
1920  * Set in the __GLcontextRec::_TriangleCaps bitfield.
1921  */
1922 /*@{*/
1923 #define DD_FLATSHADE                0x1
1924 #define DD_SEPARATE_SPECULAR        0x2
1925 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
1926 #define DD_TRI_LIGHT_TWOSIDE        0x8
1927 #define DD_TRI_UNFILLED             0x10
1928 #define DD_TRI_SMOOTH               0x20
1929 #define DD_TRI_STIPPLE              0x40
1930 #define DD_TRI_OFFSET               0x80
1931 #define DD_LINE_SMOOTH              0x100
1932 #define DD_LINE_STIPPLE             0x200
1933 #define DD_LINE_WIDTH               0x400
1934 #define DD_POINT_SMOOTH             0x800
1935 #define DD_POINT_SIZE               0x1000
1936 #define DD_POINT_ATTEN              0x2000
1937 /*@}*/
1938
1939
1940 /**
1941  * \name Define the state changes under which each of these bits might change
1942  */
1943 /*@{*/
1944 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
1945 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG)
1946 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
1947 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
1948 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
1949 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
1950 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
1951 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
1952 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
1953 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
1954 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
1955 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
1956 #define _DD_NEW_POINT_SIZE               _NEW_POINT
1957 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
1958 /*@}*/
1959
1960
1961 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
1962                                            _NEW_TEXTURE |       \
1963                                            _NEW_POINT |         \
1964                                            _NEW_MODELVIEW)
1965
1966 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
1967                                            _NEW_TEXTURE)
1968
1969 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
1970
1971
1972
1973
1974 /*
1975  * Forward declaration of display list data types:
1976  */
1977 union node;
1978 typedef union node Node;
1979
1980
1981 /* This has to be included here. */
1982 struct gl_buffer_object;
1983 #include "dd.h"
1984
1985
1986 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
1987
1988 /**
1989  * Core Mesa's support for tnl modules:
1990  */
1991 struct gl_tnl_module {
1992    /**
1993     * Vertex format to be lazily swapped into current dispatch.
1994     */
1995    GLvertexformat *Current;
1996
1997    /**
1998     * \name Record of functions swapped out.
1999     * On restore, only need to swap these functions back in.
2000     */
2001    /*@{*/
2002    void *Swapped[NUM_VERTEX_FORMAT_ENTRIES][2];
2003    GLuint SwapCount;
2004    /*@}*/
2005 };
2006
2007
2008 /**
2009  * Mesa context
2010  *
2011  * This is the central context data structure for Mesa.  Almost all
2012  * OpenGL state is contained in this structure.
2013  * Think of this as a base class from which device drivers will derive
2014  * sub classes.
2015  */
2016 struct __GLcontextRec {
2017    /**
2018     * \name OS related interfaces.
2019     *
2020     * These \b must be the first members of this structure, because they are
2021     * exposed to the outside world (i.e. GLX extension).
2022     */
2023    /*@{*/
2024    __GLimports imports;
2025    __GLexports exports;
2026    /*@}*/
2027
2028    /** State possibly shared with other contexts in the address space */
2029    struct gl_shared_state *Shared;
2030
2031    /** \name API function pointer tables */
2032    /*@{*/
2033    struct _glapi_table *Save;   /**< Display list save functions */
2034    struct _glapi_table *Exec;   /**< Execute functions */
2035    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2036    /*@}*/
2037
2038    GLboolean ExecPrefersFloat;  /**< What preference for color conversion? */
2039    GLboolean SavePrefersFloat;
2040
2041    GLvisual Visual;
2042    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2043    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2044
2045    /**
2046     * Device driver function pointer table
2047     */
2048    struct dd_function_table Driver;
2049
2050    void *DriverCtx;     /**< Points to device driver context/state */
2051    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2052
2053    /** Core/Driver constants */
2054    struct gl_constants Const;
2055
2056    /** \name The various 4x4 matrix stacks */
2057    /*@{*/
2058    struct matrix_stack ModelviewMatrixStack;
2059    struct matrix_stack ProjectionMatrixStack;
2060    struct matrix_stack ColorMatrixStack;
2061    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2062    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2063    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2064    /*@}*/
2065
2066    /** Combined modelview and projection matrix */
2067    GLmatrix _ModelProjectMatrix;
2068
2069    /** \name Display lists */
2070    /*@{*/
2071    GLuint CallDepth;            /**< Current recursion calling depth */
2072    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2073    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2074    Node *CurrentListPtr;        /**< Head of list being compiled */
2075    GLuint CurrentListNum;       /**< Number of the list being compiled */
2076    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2077    GLuint CurrentPos;           /**< Index into current block of nodes */
2078    /*@}*/
2079
2080    /** Extensions */
2081    struct gl_extensions Extensions;
2082
2083    /** \name Renderer attribute stack */
2084    /*@{*/
2085    GLuint AttribStackDepth;
2086    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2087    /*@}*/
2088
2089    /** \name Renderer attribute groups
2090     *
2091     * We define a struct for each attribute group to make pushing and popping
2092     * attributes easy.  Also it's a good organization.
2093     */
2094    /*@{*/
2095    struct gl_accum_attrib       Accum;          /**< Accumulation buffer attributes */
2096    struct gl_colorbuffer_attrib Color;          /**< Color buffers attributes */
2097    struct gl_current_attrib     Current;        /**< Current attributes */
2098    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2099    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2100    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2101    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2102    struct gl_light_attrib       Light;          /**< Light attributes */
2103    struct gl_line_attrib        Line;           /**< Line attributes */
2104    struct gl_list_attrib        List;           /**< List attributes */
2105    struct gl_multisample_attrib Multisample;
2106    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2107    struct gl_point_attrib       Point;          /**< Point attributes */
2108    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2109    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2110    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2111    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2112    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2113    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2114    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2115    /*@}*/
2116
2117    /** \name Other attribute groups */
2118    /*@{*/
2119    struct gl_histogram_attrib   Histogram;
2120    struct gl_minmax_attrib      MinMax;
2121    struct gl_convolution_attrib Convolution1D;
2122    struct gl_convolution_attrib Convolution2D;
2123    struct gl_convolution_attrib Separable2D;
2124    /*@}*/
2125
2126    /** \name Client attribute stack */
2127    /*@{*/
2128    GLuint ClientAttribStackDepth;
2129    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2130    /*@}*/
2131
2132    /** \name Client attribute groups */
2133    /*@{*/
2134    struct gl_array_attrib       Array;  /**< Vertex arrays */
2135    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2136    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2137
2138    struct gl_evaluators EvalMap;   /**< All evaluators */
2139    struct gl_feedback   Feedback;  /**< Feedback */
2140    struct gl_selection  Select;    /**< Selection */
2141
2142    struct gl_color_table ColorTable;       /**< Pre-convolution */
2143    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2144    struct gl_color_table PostConvolutionColorTable;
2145    struct gl_color_table ProxyPostConvolutionColorTable;
2146    struct gl_color_table PostColorMatrixColorTable;
2147    struct gl_color_table ProxyPostColorMatrixColorTable;
2148
2149    struct program_state Program;             /**< for vertex or fragment progs */
2150    struct vertex_program_state VertexProgram;      /**< GL_NV_vertex_program */
2151    struct fragment_program_state FragmentProgram;  /**< GL_NV_fragment_program */
2152
2153    struct occlusion_state Occlusion;  /**< GL_ARB_occlusion_query */
2154
2155    GLenum ErrorValue;        /**< Last error code */
2156    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2157    GLuint NewState;          /**< bitwise-or of _NEW_* flags */
2158    /*@}*/
2159
2160    /** \name Derived */
2161    /*@{*/
2162    GLuint _TriangleCaps;      /**< bitwise-or of DD_* flags */
2163    GLuint _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2164    GLfloat _EyeZDir[3];
2165    GLfloat _ModelViewInvScale;
2166    GLuint _NeedEyeCoords;
2167    GLuint _ForceEyeCoords;
2168    GLboolean _RotateMode;
2169    GLenum _CurrentProgram;    /* currently executing program */
2170
2171    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2172    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2173    /**@}*/
2174
2175    struct gl_list_extensions listext; /**< driver dlist extensions */
2176
2177
2178    GLboolean OcclusionResult;       /**< for GL_HP_occlusion_test */
2179    GLboolean OcclusionResultSaved;  /**< for GL_HP_occlusion_test */
2180    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2181                     *
2182                     * We don't have a better way to communicate this value from
2183                     * swrast_setup to swrast. */
2184
2185
2186    /** \name Z buffer stuff */
2187    /*@{*/
2188    GLuint DepthMax;     /**< Max depth buffer value */
2189    GLfloat DepthMaxF;   /**< Float max depth buffer value */
2190    GLfloat MRD;         /**< minimum resolvable difference in Z values */
2191    /*@}*/
2192
2193    /** Should 3Dfx Glide driver catch signals? */
2194    GLboolean CatchSignals;
2195
2196    /** \name For debugging/development only */
2197    /*@{*/
2198    GLboolean NoRaster;
2199    GLboolean FirstTimeCurrent;
2200    /*@}*/
2201
2202    /** Dither disable via MESA_NO_DITHER env var */
2203    GLboolean NoDither;
2204
2205    GLboolean Rendering;
2206
2207 #if defined(MESA_TRACE)
2208    struct _glapi_table *TraceDispatch;
2209    trace_context_t     *TraceCtx;
2210 #else
2211    void *TraceDispatch;
2212    void *TraceCtx;
2213 #endif
2214
2215    /** Core tnl module support */
2216    struct gl_tnl_module TnlModule;
2217
2218    /**
2219     * \name GL_ARB_vertex_buffer_object state
2220     *
2221     * These pointers track the buffer objects last bound via
2222     * \c glBindBufferObjectARB.  If it the last bound object ID was 0 for a
2223     * given target, the pointer will be \c NULL.
2224     */
2225    /*@{*/
2226    struct gl_buffer_object * ArrayBuffer;
2227    struct gl_buffer_object * ElementArrayBuffer;
2228    /*@}*/
2229
2230    /**
2231     * \name Hooks for module contexts.
2232     *
2233     * These will eventually live in the driver or elsewhere.
2234     */
2235    /*@{*/
2236    void *swrast_context;
2237    void *swsetup_context;
2238    void *swtnl_context;
2239    void *swtnl_im;
2240    void *acache_context;
2241    void *aelt_context;
2242    /*@}*/
2243 };
2244
2245
2246 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2247 extern const char *_mesa_prim_name[GL_POLYGON+4];
2248
2249
2250 #ifdef MESA_DEBUG
2251 extern int MESA_VERBOSE;
2252 extern int MESA_DEBUG_FLAGS;
2253 #else
2254 # define MESA_VERBOSE 0
2255 # define MESA_DEBUG_FLAGS 0
2256 # ifndef NDEBUG
2257 #  define NDEBUG
2258 # endif
2259 #endif
2260
2261
2262 enum _verbose {
2263    VERBOSE_VARRAY               = 0x0001,
2264    VERBOSE_TEXTURE              = 0x0002,
2265    VERBOSE_IMMEDIATE            = 0x0004,
2266    VERBOSE_PIPELINE             = 0x0008,
2267    VERBOSE_DRIVER               = 0x0010,
2268    VERBOSE_STATE                = 0x0020,
2269    VERBOSE_API                  = 0x0040,
2270    VERBOSE_DISPLAY_LIST         = 0x0100,
2271    VERBOSE_LIGHTING             = 0x0200,
2272    VERBOSE_PRIMS                = 0x0400,
2273    VERBOSE_VERTS                = 0x0800
2274 };
2275
2276
2277 enum _debug {
2278    DEBUG_ALWAYS_FLUSH           = 0x1
2279 };
2280
2281
2282
2283 #define Elements(x) sizeof(x)/sizeof(*(x))
2284
2285
2286 /**
2287  * Flush vertices.
2288  *
2289  * \param ctx GL context.
2290  * \param newstate new state.
2291  *
2292  * Checks if dd_function_table::NeedFlush is marked to flush stored vertices,
2293  * and calls dd_function_table::FlushVertices if so. Marks
2294  * __GLcontextRec::NewState with \p newstate.
2295  *
2296  * \todo Eventually let the driver specify what state changes require a flush:
2297  */
2298 #define FLUSH_VERTICES(ctx, newstate)                           \
2299 do {                                                            \
2300    if (MESA_VERBOSE & VERBOSE_STATE)                            \
2301       _mesa_debug(ctx, "FLUSH_VERTICES in %s\n", __FUNCTION__); \
2302    if (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES)           \
2303       ctx->Driver.FlushVertices(ctx, FLUSH_STORED_VERTICES);    \
2304    ctx->NewState |= newstate;                                   \
2305 } while (0)
2306
2307 /**
2308  * Flush current state.
2309  *
2310  * \param ctx GL context.
2311  * \param newstate new state.
2312  *
2313  * Checks if dd_function_table::NeedFlush is marked to flush current state,
2314  * and calls dd_function_table::FlushVertices if so. Marks
2315  * __GLcontextRec::NewState with \p newstate.
2316  */
2317 #define FLUSH_CURRENT(ctx, newstate)                            \
2318 do {                                                            \
2319    if (MESA_VERBOSE & VERBOSE_STATE)                            \
2320       _mesa_debug(ctx, "FLUSH_CURRENT in %s\n", __FUNCTION__);  \
2321    if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT)            \
2322       ctx->Driver.FlushVertices(ctx, FLUSH_UPDATE_CURRENT);     \
2323    ctx->NewState |= newstate;                                   \
2324 } while (0)
2325
2326 /**
2327  * Macro to assert that the API call was made outside the
2328  * glBegin()/glEnd() pair, with return value.
2329  *
2330  * \param ctx GL context.
2331  * \param retval value to return value in case the assertion fails.
2332  */
2333 #define ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval)               \
2334 do {                                                                    \
2335    if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) {    \
2336       _mesa_error( ctx, GL_INVALID_OPERATION, "begin/end" );            \
2337       return retval;                                                    \
2338    }                                                                    \
2339 } while (0)
2340
2341 /**
2342  * Macro to assert that the API call was made outside the
2343  * glBegin()/glEnd() pair.
2344  *
2345  * \param ctx GL context.
2346  */
2347 #define ASSERT_OUTSIDE_BEGIN_END(ctx)                                   \
2348 do {                                                                    \
2349    if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) {    \
2350       _mesa_error( ctx, GL_INVALID_OPERATION, "begin/end" );            \
2351       return;                                                           \
2352    }                                                                    \
2353 } while (0)
2354
2355 /**
2356  * Macro to assert that the API call was made outside the
2357  * glBegin()/glEnd() pair and flush the vertices.
2358  *
2359  * \param ctx GL context.
2360  */
2361 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx)                         \
2362 do {                                                                    \
2363    ASSERT_OUTSIDE_BEGIN_END(ctx);                                       \
2364    FLUSH_VERTICES(ctx, 0);                                              \
2365 } while (0)
2366
2367 /**
2368  * Macro to assert that the API call was made outside the
2369  * glBegin()/glEnd() pair and flush the vertices, with return value.
2370  *
2371  * \param ctx GL context.
2372  * \param retval value to return value in case the assertion fails.
2373  */
2374 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx, retval)     \
2375 do {                                                                    \
2376    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval);                   \
2377    FLUSH_VERTICES(ctx, 0);                                              \
2378 } while (0)
2379
2380
2381 #endif /* TYPES_H */