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