src/mesa/main/mtypes.h

   1 /* $Id: mtypes.h,v 1.21 2001/02/20 16:42:25 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.5
   6  *
   7  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 #ifndef TYPES_H
  29 #define TYPES_H
  30
  31
  32 #include "glheader.h"
  33 #include "config.h"             /* Hardwired parameters */
  34 #include "glapitable.h"
  35 #include "glthread.h"
  36
  37 #include "math/m_matrix.h"      /* GLmatrix */
  38
  39 #if defined(MESA_TRACE)
  40 #include "Trace/tr_context.h"
  41 #endif
  42
  43
  44 /* This is a macro on IRIX */
  45 #ifdef _P
  46 #undef _P
  47 #endif
  48
  49
  50 /* Please try to mark derived values with a leading underscore ('_').
  51  */
  52
  53 /*
  54  * Color channel data type:
  55  */
  56 #if CHAN_BITS == 8
  57    typedef GLubyte GLchan;
  58 #define CHAN_MAX 255
  59 #define CHAN_MAXF 255.0F
  60 #define CHAN_TYPE GL_UNSIGNED_BYTE
  61 #elif CHAN_BITS == 16
  62    typedef GLushort GLchan;
  63 #define CHAN_MAX 65535
  64 #define CHAN_MAXF 65535.0F
  65 #define CHAN_TYPE GL_UNSIGNED_SHORT
  66 #elif CHAN_BITS == 32
  67    typedef GLfloat GLchan;
  68 #define CHAN_MAX 1.0
  69 #define CHAN_MAXF 1.0F
  70 #define CHAN_TYPE GL_FLOAT
  71 #else
  72 #error  illegal number of color channel bits
  73 #endif
  74
  75
  76 /*
  77  * Accumulation buffer data type:
  78  */
  79 #if ACCUM_BITS==8
  80    typedef GLbyte GLaccum;
  81 #elif ACCUM_BITS==16
  82    typedef GLshort GLaccum;
  83 #else
  84 #  error "illegal number of accumulation bits"
  85 #endif
  86
  87
  88 /*
  89  * Stencil buffer data type:
  90  */
  91 #if STENCIL_BITS==8
  92    typedef GLubyte GLstencil;
  93 #  define STENCIL_MAX 0xff
  94 #elif STENCIL_BITS==16
  95    typedef GLushort GLstencil;
  96 #  define STENCIL_MAX 0xffff
  97 #else
  98 #  error "illegal number of stencil bits"
  99 #endif
 100
 101
 102 /*
 103  * Depth buffer data type:
 104  */
 105 typedef GLuint GLdepth;  /* Must be 32-bits! */
 106
 107
 108 /*
 109  * Fixed point data type:
 110  */
 111 typedef int GLfixed;
 112
 113
 114
 115 /*
 116  * Some forward type declarations
 117  */
 118 struct _mesa_HashTable;
 119 struct gl_texture_image;
 120 struct gl_texture_object;
 121 typedef struct __GLcontextRec GLcontext;
 122 typedef struct __GLcontextModesRec GLvisual;
 123 typedef struct gl_frame_buffer GLframebuffer;
 124
 125
 126
 127 /* Maximum number of temporary vertices required for clipping.  (Used
 128  * in array_cache and tnl modules).
 129  */
 130 #define MAX_CLIPPED_VERTICES ((2 * (6 + MAX_CLIP_PLANES))+1)
 131
 132
 133 /* Data structure for color tables */
 134 struct gl_color_table {
 135    GLenum Format;         /* GL_ALPHA, GL_RGB, GL_RGB, etc */
 136    GLenum IntFormat;
 137    GLuint Size;           /* number of entries (rows) in table */
 138    GLvoid *Table;         /* either GLfloat * or GLchan * */
 139    GLboolean FloatTable;  /* are entries stored as floats? */
 140    GLubyte RedSize;
 141    GLubyte GreenSize;
 142    GLubyte BlueSize;
 143    GLubyte AlphaSize;
 144    GLubyte LuminanceSize;
 145    GLubyte IntensitySize;
 146 };
 147
 148
 149 /*
 150  * Bit flags used for updating material values.
 151  */
 152 #define FRONT_AMBIENT_BIT     0x1
 153 #define BACK_AMBIENT_BIT      0x2
 154 #define FRONT_DIFFUSE_BIT     0x4
 155 #define BACK_DIFFUSE_BIT      0x8
 156 #define FRONT_SPECULAR_BIT   0x10
 157 #define BACK_SPECULAR_BIT    0x20
 158 #define FRONT_EMISSION_BIT   0x40
 159 #define BACK_EMISSION_BIT    0x80
 160 #define FRONT_SHININESS_BIT 0x100
 161 #define BACK_SHININESS_BIT  0x200
 162 #define FRONT_INDEXES_BIT   0x400
 163 #define BACK_INDEXES_BIT    0x800
 164
 165 #define FRONT_MATERIAL_BITS     (FRONT_EMISSION_BIT | FRONT_AMBIENT_BIT | \
 166                                  FRONT_DIFFUSE_BIT | FRONT_SPECULAR_BIT | \
 167                                  FRONT_SHININESS_BIT | FRONT_INDEXES_BIT)
 168
 169 #define BACK_MATERIAL_BITS      (BACK_EMISSION_BIT | BACK_AMBIENT_BIT | \
 170                                  BACK_DIFFUSE_BIT | BACK_SPECULAR_BIT | \
 171                                  BACK_SHININESS_BIT | BACK_INDEXES_BIT)
 172
 173 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 174
 175
 176
 177 /*
 178  * Specular exponent and material shininess lookup table sizes:
 179  */
 180 #define EXP_TABLE_SIZE 512
 181 #define SHINE_TABLE_SIZE 256
 182
 183 struct gl_shine_tab {
 184    struct gl_shine_tab *next, *prev;
 185    GLfloat tab[SHINE_TABLE_SIZE+1];
 186    GLfloat shininess;
 187    GLuint refcount;
 188 };
 189
 190
 191 struct gl_light {
 192    struct gl_light *next;               /* double linked list with sentinel */
 193    struct gl_light *prev;
 194
 195    GLfloat Ambient[4];          /* ambient color */
 196    GLfloat Diffuse[4];          /* diffuse color */
 197    GLfloat Specular[4];         /* specular color */
 198    GLfloat EyePosition[4];      /* position in eye coordinates */
 199    GLfloat EyeDirection[4];     /* spotlight dir in eye coordinates */
 200    GLfloat SpotExponent;
 201    GLfloat SpotCutoff;          /* in degress */
 202    GLfloat _CosCutoff;          /* = MAX(0, cos(SpotCutoff)) */
 203    GLfloat ConstantAttenuation;
 204    GLfloat LinearAttenuation;
 205    GLfloat QuadraticAttenuation;
 206    GLboolean Enabled;           /* On/off flag */
 207
 208    /* Derived fields */
 209    GLuint _Flags;               /* State */
 210
 211    GLfloat _Position[4];        /* position in eye/obj coordinates */
 212    GLfloat _VP_inf_norm[3];     /* Norm direction to infinite light */
 213    GLfloat _h_inf_norm[3];      /* Norm( _VP_inf_norm + <0,0,1> ) */
 214    GLfloat _NormDirection[4];   /* normalized spotlight direction */
 215    GLfloat _VP_inf_spot_attenuation;
 216
 217    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /* to replace a pow() call */
 218    GLfloat _MatAmbient[2][3];   /* material ambient * light ambient */
 219    GLfloat _MatDiffuse[2][3];   /* material diffuse * light diffuse */
 220    GLfloat _MatSpecular[2][3];  /* material spec * light specular */
 221    GLfloat _dli;                /* CI diffuse light intensity */
 222    GLfloat _sli;                /* CI specular light intensity */
 223 };
 224
 225
 226 struct gl_lightmodel {
 227    GLfloat Ambient[4];          /* ambient color */
 228    GLboolean LocalViewer;       /* Local (or infinite) view point? */
 229    GLboolean TwoSide;           /* Two (or one) sided lighting? */
 230    GLenum ColorControl;         /* either GL_SINGLE_COLOR */
 231                                 /* or GL_SEPARATE_SPECULAR_COLOR */
 232 };
 233
 234
 235 struct gl_material
 236 {
 237    GLfloat Ambient[4];
 238    GLfloat Diffuse[4];
 239    GLfloat Specular[4];
 240    GLfloat Emission[4];
 241    GLfloat Shininess;
 242    GLfloat AmbientIndex;        /* for color index lighting */
 243    GLfloat DiffuseIndex;        /* for color index lighting */
 244    GLfloat SpecularIndex;       /* for color index lighting */
 245 };
 246
 247
 248 /*
 249  * Attribute structures:
 250  *    We define a struct for each attribute group to make pushing and
 251  *    popping attributes easy.  Also it's a good organization.
 252  */
 253 struct gl_accum_attrib {
 254    GLfloat ClearColor[4];       /* Accumulation buffer clear color */
 255 };
 256
 257
 258 /*
 259  * Used in DrawDestMask below
 260  */
 261 #define FRONT_LEFT_BIT  1
 262 #define FRONT_RIGHT_BIT 2
 263 #define BACK_LEFT_BIT   4
 264 #define BACK_RIGHT_BIT  8
 265
 266
 267 struct gl_colorbuffer_attrib {
 268    GLuint ClearIndex;                   /* Index to use for glClear */
 269    GLchan ClearColor[4];                /* Color to use for glClear */
 270
 271    GLuint IndexMask;                    /* Color index write mask */
 272    GLubyte ColorMask[4];                /* Each flag is 0xff or 0x0 */
 273
 274    GLenum DrawBuffer;                   /* Which buffer to draw into */
 275    GLenum DriverDrawBuffer;             /* Current device driver dest buffer */
 276    GLboolean MultiDrawBuffer;           /* Drawing to mutliple buffers? */
 277    GLubyte DrawDestMask;                /* bitwise-OR of bitflags above */
 278
 279    /* alpha testing */
 280    GLboolean AlphaEnabled;              /* Alpha test enabled flag */
 281    GLenum AlphaFunc;                    /* Alpha test function */
 282    GLchan AlphaRef;                     /* Alpha ref value as GLchan */
 283
 284    /* blending */
 285    GLboolean BlendEnabled;              /* Blending enabled flag */
 286    GLenum BlendSrcRGB;                  /* Blending source operator */
 287    GLenum BlendDstRGB;                  /* Blending destination operator */
 288    GLenum BlendSrcA;                    /* GL_INGR_blend_func_separate */
 289    GLenum BlendDstA;                    /* GL_INGR_blend_func_separate */
 290    GLenum BlendEquation;
 291    GLfloat BlendColor[4];
 292
 293    /* logic op */
 294    GLenum LogicOp;                      /* Logic operator */
 295    GLboolean IndexLogicOpEnabled;       /* Color index logic op enabled flag */
 296    GLboolean ColorLogicOpEnabled;       /* RGBA logic op enabled flag */
 297
 298    GLboolean DitherFlag;                /* Dither enable flag */
 299 };
 300
 301
 302 struct gl_current_attrib {
 303    /* These values valid only when FLUSH_VERTICES has been called.
 304     */
 305    GLfloat Normal[3];                           /* Current vertex normal */
 306    GLchan Color[4];                             /* Current RGBA color */
 307    GLchan SecondaryColor[4];                    /* Current secondary color */
 308    GLfloat FogCoord;                            /* Current Fog coord */
 309    GLuint Index;                                /* Current color index */
 310    GLboolean EdgeFlag;                          /* Current edge flag */
 311    GLfloat Texcoord[MAX_TEXTURE_UNITS][4];      /* Current texture coords */
 312
 313    /* These values are always valid.
 314     */
 315    GLfloat RasterPos[4];                        /* Current raster position */
 316    GLfloat RasterDistance;                      /* Current raster distance */
 317    GLfloat RasterColor[4];                      /* Current raster color */
 318    GLuint  RasterIndex;                         /* Current raster index */
 319    GLfloat *RasterTexCoord;                     /* Current raster texcoord*/
 320    GLfloat RasterMultiTexCoord[MAX_TEXTURE_UNITS][4];
 321    GLboolean RasterPosValid;                    /* Raster po valid flag */
 322 };
 323
 324
 325 struct gl_depthbuffer_attrib {
 326    GLenum Func;                 /* Function for depth buffer compare */
 327    GLfloat Clear;               /* Value to clear depth buffer to */
 328    GLboolean Test;              /* Depth buffering enabled flag */
 329    GLboolean Mask;              /* Depth buffer writable? */
 330    GLboolean OcclusionTest;     /* GL_HP_occlusion_test */
 331 };
 332
 333
 334 struct gl_enable_attrib {
 335    GLboolean AlphaTest;
 336    GLboolean AutoNormal;
 337    GLboolean Blend;
 338    GLboolean ClipPlane[MAX_CLIP_PLANES];
 339    GLboolean ColorMaterial;
 340    GLboolean Convolution1D;
 341    GLboolean Convolution2D;
 342    GLboolean Separable2D;
 343    GLboolean CullFace;
 344    GLboolean DepthTest;
 345    GLboolean Dither;
 346    GLboolean Fog;
 347    GLboolean Histogram;
 348    GLboolean Light[MAX_LIGHTS];
 349    GLboolean Lighting;
 350    GLboolean LineSmooth;
 351    GLboolean LineStipple;
 352    GLboolean IndexLogicOp;
 353    GLboolean ColorLogicOp;
 354    GLboolean Map1Color4;
 355    GLboolean Map1Index;
 356    GLboolean Map1Normal;
 357    GLboolean Map1TextureCoord1;
 358    GLboolean Map1TextureCoord2;
 359    GLboolean Map1TextureCoord3;
 360    GLboolean Map1TextureCoord4;
 361    GLboolean Map1Vertex3;
 362    GLboolean Map1Vertex4;
 363    GLboolean Map2Color4;
 364    GLboolean Map2Index;
 365    GLboolean Map2Normal;
 366    GLboolean Map2TextureCoord1;
 367    GLboolean Map2TextureCoord2;
 368    GLboolean Map2TextureCoord3;
 369    GLboolean Map2TextureCoord4;
 370    GLboolean Map2Vertex3;
 371    GLboolean Map2Vertex4;
 372    GLboolean MinMax;
 373    GLboolean Normalize;
 374    GLboolean PixelTexture;
 375    GLboolean PointSmooth;
 376    GLboolean PolygonOffsetPoint;
 377    GLboolean PolygonOffsetLine;
 378    GLboolean PolygonOffsetFill;
 379    GLboolean PolygonSmooth;
 380    GLboolean PolygonStipple;
 381    GLboolean RescaleNormals;
 382    GLboolean Scissor;
 383    GLboolean Stencil;
 384    GLuint Texture[MAX_TEXTURE_UNITS];
 385    GLuint TexGen[MAX_TEXTURE_UNITS];
 386 };
 387
 388
 389 struct gl_eval_attrib {
 390    /* Enable bits */
 391    GLboolean Map1Color4;
 392    GLboolean Map1Index;
 393    GLboolean Map1Normal;
 394    GLboolean Map1TextureCoord1;
 395    GLboolean Map1TextureCoord2;
 396    GLboolean Map1TextureCoord3;
 397    GLboolean Map1TextureCoord4;
 398    GLboolean Map1Vertex3;
 399    GLboolean Map1Vertex4;
 400    GLboolean Map2Color4;
 401    GLboolean Map2Index;
 402    GLboolean Map2Normal;
 403    GLboolean Map2TextureCoord1;
 404    GLboolean Map2TextureCoord2;
 405    GLboolean Map2TextureCoord3;
 406    GLboolean Map2TextureCoord4;
 407    GLboolean Map2Vertex3;
 408    GLboolean Map2Vertex4;
 409    GLboolean AutoNormal;
 410    /* Map Grid endpoints and divisions and calculated du values */
 411    GLint MapGrid1un;
 412    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 413    GLint MapGrid2un, MapGrid2vn;
 414    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 415    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 416 };
 417
 418
 419 struct gl_fog_attrib {
 420    GLboolean Enabled;           /* Fog enabled flag */
 421    GLfloat Color[4];            /* Fog color */
 422    GLfloat Density;             /* Density >= 0.0 */
 423    GLfloat Start;               /* Start distance in eye coords */
 424    GLfloat End;                 /* End distance in eye coords */
 425    GLfloat Index;               /* Fog index */
 426    GLenum Mode;                 /* Fog mode */
 427    GLboolean ColorSumEnabled;
 428    GLenum FogCoordinateSource;
 429 };
 430
 431
 432 struct gl_hint_attrib {
 433    /* always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE */
 434    GLenum PerspectiveCorrection;
 435    GLenum PointSmooth;
 436    GLenum LineSmooth;
 437    GLenum PolygonSmooth;
 438    GLenum Fog;
 439
 440    /* GL_EXT_clip_volume_hint */
 441    GLenum ClipVolumeClipping;
 442
 443    /* GL_ARB_texture_compression */
 444    GLenum TextureCompression;
 445 };
 446
 447
 448 struct gl_histogram_attrib {
 449    GLuint Width;                                /* number of table entries */
 450    GLint Format;                                /* GL_ALPHA, GL_RGB, etc */
 451    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /* the histogram */
 452    GLboolean Sink;                              /* terminate image transfer? */
 453    GLubyte RedSize;                             /* Bits per counter */
 454    GLubyte GreenSize;
 455    GLubyte BlueSize;
 456    GLubyte AlphaSize;
 457    GLubyte LuminanceSize;
 458 };
 459
 460
 461 struct gl_minmax_attrib {
 462    GLenum Format;
 463    GLboolean Sink;
 464    GLfloat Min[4], Max[4];   /* RGBA */
 465 };
 466
 467
 468 struct gl_convolution_attrib {
 469    GLenum Format;
 470    GLenum InternalFormat;
 471    GLuint Width;
 472    GLuint Height;
 473    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 474 };
 475
 476
 477 struct gl_light_attrib {
 478    struct gl_light Light[MAX_LIGHTS];   /* Array of lights */
 479    struct gl_lightmodel Model;          /* Lighting model */
 480
 481    /* Must flush FLUSH_VERTICES before referencing:
 482     */
 483    struct gl_material Material[2];      /* Material 0=front, 1=back */
 484
 485    GLboolean Enabled;                   /* Lighting enabled flag */
 486    GLenum ShadeModel;                   /* GL_FLAT or GL_SMOOTH */
 487    GLenum ColorMaterialFace;            /* GL_FRONT, BACK or FRONT_AND_BACK */
 488    GLenum ColorMaterialMode;            /* GL_AMBIENT, GL_DIFFUSE, etc */
 489    GLuint ColorMaterialBitmask;         /* bitmask formed from Face and Mode */
 490    GLboolean ColorMaterialEnabled;
 491
 492    struct gl_light EnabledList;         /* List sentinel */
 493
 494    /* Derived for optimizations: */
 495    GLboolean _NeedVertices;             /* Use fast shader? */
 496    GLuint  _Flags;                      /* LIGHT_* flags, see below */
 497    GLfloat _BaseColor[2][3];
 498    GLchan _BaseAlpha[2];
 499 };
 500
 501
 502 #define LIGHT_SPOT         0x1
 503 #define LIGHT_LOCAL_VIEWER 0x2
 504 #define LIGHT_POSITIONAL   0x4
 505
 506 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 507
 508 struct gl_line_attrib {
 509    GLboolean SmoothFlag;        /* GL_LINE_SMOOTH enabled? */
 510    GLboolean StippleFlag;       /* GL_LINE_STIPPLE enabled? */
 511    GLushort StipplePattern;     /* Stipple pattern */
 512    GLint StippleFactor;         /* Stipple repeat factor */
 513    GLfloat Width;               /* Line width */
 514    GLfloat _Width;              /* Clamped Line width */
 515 };
 516
 517
 518 struct gl_list_attrib {
 519    GLuint ListBase;
 520 };
 521
 522 struct gl_list_opcode {
 523    GLuint size;
 524    void (*execute)( GLcontext *ctx, void *data );
 525    void (*destroy)( GLcontext *ctx, void *data );
 526    void (*print)( GLcontext *ctx, void *data );
 527 };
 528
 529 #define GL_MAX_EXT_OPCODES 16
 530
 531 struct gl_list_extensions {
 532    struct gl_list_opcode opcode[GL_MAX_EXT_OPCODES];
 533    GLuint nr_opcodes;
 534 };
 535
 536 struct gl_pixel_attrib {
 537    GLenum ReadBuffer;           /* src buffer for glRead/CopyPixels */
 538    GLenum DriverReadBuffer;     /* Driver's current source buffer */
 539    GLfloat RedBias, RedScale;
 540    GLfloat GreenBias, GreenScale;
 541    GLfloat BlueBias, BlueScale;
 542    GLfloat AlphaBias, AlphaScale;
 543    GLfloat DepthBias, DepthScale;
 544    GLint IndexShift, IndexOffset;
 545    GLboolean MapColorFlag;
 546    GLboolean MapStencilFlag;
 547    GLfloat ZoomX, ZoomY;
 548    GLint MapStoSsize;           /* Size of each pixel map */
 549    GLint MapItoIsize;
 550    GLint MapItoRsize;
 551    GLint MapItoGsize;
 552    GLint MapItoBsize;
 553    GLint MapItoAsize;
 554    GLint MapRtoRsize;
 555    GLint MapGtoGsize;
 556    GLint MapBtoBsize;
 557    GLint MapAtoAsize;
 558    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /* Pixel map tables */
 559    GLint MapItoI[MAX_PIXEL_MAP_TABLE];
 560    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 561    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 562    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 563    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 564    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /* converted to 8-bit color */
 565    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 566    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 567    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 568    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 569    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 570    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 571    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 572    /* GL_EXT_histogram */
 573    GLboolean HistogramEnabled;
 574    GLboolean MinMaxEnabled;
 575    /* GL_SGIS_pixel_texture */
 576    GLboolean PixelTextureEnabled;
 577    GLenum FragmentRgbSource;
 578    GLenum FragmentAlphaSource;
 579    /* GL_SGI_color_matrix */
 580    GLfloat PostColorMatrixScale[4];  /* RGBA */
 581    GLfloat PostColorMatrixBias[4];   /* RGBA */
 582    /* GL_SGI_color_table */
 583    GLfloat ColorTableScale[4];
 584    GLfloat ColorTableBias[4];
 585    GLboolean ColorTableEnabled;
 586    GLfloat PCCTscale[4];
 587    GLfloat PCCTbias[4];
 588    GLboolean PostConvolutionColorTableEnabled;
 589    GLfloat PCMCTscale[4];
 590    GLfloat PCMCTbias[4];
 591    GLboolean PostColorMatrixColorTableEnabled;
 592    /* Convolution */
 593    GLboolean Convolution1DEnabled;
 594    GLboolean Convolution2DEnabled;
 595    GLboolean Separable2DEnabled;
 596    GLfloat ConvolutionBorderColor[3][4];
 597    GLenum ConvolutionBorderMode[3];
 598    GLfloat ConvolutionFilterScale[3][4];
 599    GLfloat ConvolutionFilterBias[3][4];
 600    GLfloat PostConvolutionScale[4];  /* RGBA */
 601    GLfloat PostConvolutionBias[4];   /* RGBA */
 602 };
 603
 604
 605 struct gl_point_attrib {
 606    GLboolean SmoothFlag;        /* True if GL_POINT_SMOOTH is enabled */
 607    GLboolean SpriteMode;        /* GL_MESA_sprite_point extension */
 608    GLfloat Size;                /* User-specified point size */
 609    GLfloat _Size;               /* Size clamped to Const.Min/MaxPointSize */
 610    GLfloat Params[3];           /* GL_EXT_point_parameters */
 611    GLfloat MinSize, MaxSize;    /* GL_EXT_point_parameters */
 612    GLfloat Threshold;           /* GL_EXT_point_parameters */
 613    GLboolean _Attenuated;       /* True if Params != [1, 0, 0] */
 614 };
 615
 616
 617 struct gl_polygon_attrib {
 618    GLenum FrontFace;            /* Either GL_CW or GL_CCW */
 619    GLenum FrontMode;            /* Either GL_POINT, GL_LINE or GL_FILL */
 620    GLenum BackMode;             /* Either GL_POINT, GL_LINE or GL_FILL */
 621    GLboolean _FrontBit;         /*  */
 622    GLboolean CullFlag;          /* Culling on/off flag */
 623    GLboolean SmoothFlag;        /* True if GL_POLYGON_SMOOTH is enabled */
 624    GLboolean StippleFlag;       /* True if GL_POLYGON_STIPPLE is enabled */
 625    GLenum CullFaceMode;         /* Culling mode GL_FRONT or GL_BACK */
 626    GLfloat OffsetFactor;        /* Polygon offset factor, from user */
 627    GLfloat OffsetUnits;         /* Polygon offset units, from user */
 628    GLfloat OffsetMRD;           /* = OffsetUnits * visual->MRD */
 629    GLboolean OffsetPoint;       /* Offset in GL_POINT mode */
 630    GLboolean OffsetLine;        /* Offset in GL_LINE mode */
 631    GLboolean OffsetFill;        /* Offset in GL_FILL mode */
 632    GLboolean _OffsetAny;
 633 };
 634
 635
 636 struct gl_scissor_attrib {
 637    GLboolean Enabled;           /* Scissor test enabled? */
 638    GLint X, Y;                  /* Lower left corner of box */
 639    GLsizei Width, Height;       /* Size of box */
 640 };
 641
 642
 643 struct gl_stencil_attrib {
 644    GLboolean Enabled;           /* Enabled flag */
 645    GLenum Function;             /* Stencil function */
 646    GLenum FailFunc;             /* Fail function */
 647    GLenum ZPassFunc;            /* Depth buffer pass function */
 648    GLenum ZFailFunc;            /* Depth buffer fail function */
 649    GLstencil Ref;               /* Reference value */
 650    GLstencil ValueMask;         /* Value mask */
 651    GLstencil Clear;             /* Clear value */
 652    GLstencil WriteMask;         /* Write mask */
 653 };
 654
 655
 656 /* TexGenEnabled flags */
 657 #define S_BIT 1
 658 #define T_BIT 2
 659 #define R_BIT 4
 660 #define Q_BIT 8
 661
 662 /* Texture Enabled flags */
 663 #define TEXTURE0_1D   0x1     /* Texture unit 0 (default) */
 664 #define TEXTURE0_2D   0x2
 665 #define TEXTURE0_3D   0x4
 666 #define TEXTURE0_CUBE 0x8
 667 #define TEXTURE0_ANY  (TEXTURE0_1D | TEXTURE0_2D | TEXTURE0_3D | TEXTURE0_CUBE)
 668 #define TEXTURE1_1D   (TEXTURE0_1D << 4)    /* Texture unit 1 */
 669 #define TEXTURE1_2D   (TEXTURE0_2D << 4)
 670 #define TEXTURE1_3D   (TEXTURE0_3D << 4)
 671 #define TEXTURE1_CUBE (TEXTURE0_CUBE << 4)
 672 #define TEXTURE1_ANY  (TEXTURE1_1D | TEXTURE1_2D | TEXTURE1_3D | TEXTURE1_CUBE)
 673 #define TEXTURE2_1D   (TEXTURE0_1D << 8)    /* Texture unit 2 */
 674 #define TEXTURE2_2D   (TEXTURE0_2D << 8)
 675 #define TEXTURE2_3D   (TEXTURE0_3D << 8)
 676 #define TEXTURE2_CUBE (TEXTURE0_CUBE << 8)
 677 #define TEXTURE2_ANY  (TEXTURE2_1D | TEXTURE2_2D | TEXTURE2_3D | TEXTURE2_CUBE)
 678 #define TEXTURE3_1D   (TEXTURE0_1D << 12)    /* Texture unit 3 */
 679 #define TEXTURE3_2D   (TEXTURE0_2D << 12)
 680 #define TEXTURE3_3D   (TEXTURE0_3D << 12)
 681 #define TEXTURE3_CUBE (TEXTURE0_CUBE << 12)
 682 #define TEXTURE3_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 683 #define TEXTURE4_1D   (TEXTURE0_1D << 16)    /* Texture unit 3 */
 684 #define TEXTURE4_2D   (TEXTURE0_2D << 16)
 685 #define TEXTURE4_3D   (TEXTURE0_3D << 16)
 686 #define TEXTURE4_CUBE (TEXTURE0_CUBE << 16)
 687 #define TEXTURE5_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 688 #define TEXTURE5_1D   (TEXTURE0_1D << 20)    /* Texture unit 3 */
 689 #define TEXTURE5_2D   (TEXTURE0_2D << 20)
 690 #define TEXTURE5_3D   (TEXTURE0_3D << 20)
 691 #define TEXTURE5_CUBE (TEXTURE0_CUBE << 20)
 692 #define TEXTURE5_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 693 #define TEXTURE6_1D   (TEXTURE0_1D << 24)    /* Texture unit 3 */
 694 #define TEXTURE6_2D   (TEXTURE0_2D << 24)
 695 #define TEXTURE6_3D   (TEXTURE0_3D << 24)
 696 #define TEXTURE6_CUBE (TEXTURE0_CUBE << 24)
 697 #define TEXTURE6_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 698 #define TEXTURE7_1D   (TEXTURE0_1D << 28)    /* Texture unit 3 */
 699 #define TEXTURE7_2D   (TEXTURE0_2D << 28)
 700 #define TEXTURE7_3D   (TEXTURE0_3D << 28)
 701 #define TEXTURE7_CUBE (TEXTURE0_CUBE << 28)
 702 #define TEXTURE7_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 703
 704 /* Bitmap versions of the GL_ constants.
 705  */
 706 #define TEXGEN_SPHERE_MAP        0x1
 707 #define TEXGEN_OBJ_LINEAR        0x2
 708 #define TEXGEN_EYE_LINEAR        0x4
 709 #define TEXGEN_REFLECTION_MAP_NV 0x8
 710 #define TEXGEN_NORMAL_MAP_NV     0x10
 711
 712 #define TEXGEN_NEED_M            (TEXGEN_SPHERE_MAP)
 713 #define TEXGEN_NEED_F            (TEXGEN_SPHERE_MAP        | \
 714                                   TEXGEN_REFLECTION_MAP_NV)
 715 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
 716                                   TEXGEN_REFLECTION_MAP_NV | \
 717                                   TEXGEN_NORMAL_MAP_NV)
 718 #define TEXGEN_NEED_VERTICES     (TEXGEN_OBJ_LINEAR |           \
 719                                   TEXGEN_EYE_LINEAR |           \
 720                                   TEXGEN_REFLECTION_MAP_NV |    \
 721                                   TEXGEN_SPHERE_MAP )
 722 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
 723                                   TEXGEN_REFLECTION_MAP_NV | \
 724                                   TEXGEN_NORMAL_MAP_NV     | \
 725                                   TEXGEN_EYE_LINEAR)
 726
 727
 728
 729 /* A selection of state flags to make driver and module's lives easier.
 730  */
 731 #define ENABLE_TEXGEN0        0x1
 732 #define ENABLE_TEXGEN1        0x2
 733 #define ENABLE_TEXGEN2        0x4
 734 #define ENABLE_TEXGEN3        0x8
 735 #define ENABLE_TEXGEN4        0x10
 736 #define ENABLE_TEXGEN5        0x20
 737 #define ENABLE_TEXGEN6        0x40
 738 #define ENABLE_TEXGEN7        0x80
 739 #define ENABLE_TEXMAT0        0x100     /* Ie. not the identity matrix */
 740 #define ENABLE_TEXMAT1        0x200
 741 #define ENABLE_TEXMAT2        0x400
 742 #define ENABLE_TEXMAT3        0x800
 743 #define ENABLE_TEXMAT4        0x1000
 744 #define ENABLE_TEXMAT5        0x2000
 745 #define ENABLE_TEXMAT6        0x4000
 746 #define ENABLE_TEXMAT7        0x8000
 747 #define ENABLE_LIGHT          0x10000
 748 #define ENABLE_FOG            0x20000
 749 #define ENABLE_USERCLIP       0x40000
 750 #define ENABLE_NORMALIZE      0x100000
 751 #define ENABLE_RESCALE        0x200000
 752 #define ENABLE_POINT_ATTEN    0x400000
 753
 754
 755 #define ENABLE_TEXGEN_ANY (ENABLE_TEXGEN0 | ENABLE_TEXGEN1 | \
 756                            ENABLE_TEXGEN2 | ENABLE_TEXGEN3 | \
 757                            ENABLE_TEXGEN4 | ENABLE_TEXGEN5 | \
 758                            ENABLE_TEXGEN6 | ENABLE_TEXGEN7)
 759
 760 #define ENABLE_TEXMAT_ANY (ENABLE_TEXMAT0 | ENABLE_TEXMAT1 | \
 761                            ENABLE_TEXMAT2 | ENABLE_TEXMAT3 | \
 762                            ENABLE_TEXMAT4 | ENABLE_TEXMAT5 | \
 763                            ENABLE_TEXMAT6 | ENABLE_TEXMAT7)
 764
 765 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
 766 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
 767
 768
 769 /*
 770  * If teximage is color-index, texelOut returns GLchan[1].
 771  * If teximage is depth, texelOut returns GLfloat[1].
 772  * Otherwise, texelOut returns GLchan[4].
 773  */
 774 typedef void (*FetchTexelFunc)( const struct gl_texture_image *texImage,
 775                                 GLint col, GLint row, GLint img,
 776                                 GLvoid *texelOut );
 777
 778
 779 /* Texture image record */
 780 struct gl_texture_image {
 781    GLenum Format;               /* GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA,
 782                                  * GL_INTENSITY, GL_RGB, GL_RGBA, or
 783                                  * GL_COLOR_INDEX only
 784                                  */
 785    GLenum Type;                 /* Texel type: GL_UNSIGNED_BYTE, etc. */
 786    GLenum IntFormat;            /* Internal format as given by the user */
 787    GLubyte RedBits;             /* Bits per texel component              */
 788    GLubyte GreenBits;           /*   These are initialized by Mesa but   */
 789    GLubyte BlueBits;            /*   may be reassigned by the device     */
 790    GLubyte AlphaBits;           /*   driver to indicate the true texture */
 791    GLubyte IntensityBits;       /*   color resolution.                   */
 792    GLubyte LuminanceBits;
 793    GLubyte IndexBits;
 794    GLubyte DepthBits;
 795    GLuint Border;               /* 0 or 1 */
 796    GLuint Width;                /* = 2^WidthLog2 + 2*Border */
 797    GLuint Height;               /* = 2^HeightLog2 + 2*Border */
 798    GLuint Depth;                /* = 2^DepthLog2 + 2*Border */
 799    GLuint Width2;               /* = Width - 2*Border */
 800    GLuint Height2;              /* = Height - 2*Border */
 801    GLuint Depth2;               /* = Depth - 2*Border */
 802    GLuint WidthLog2;            /* = log2(Width2) */
 803    GLuint HeightLog2;           /* = log2(Height2) */
 804    GLuint DepthLog2;            /* = log2(Depth2) */
 805    GLuint MaxLog2;              /* = MAX(WidthLog2, HeightLog2) */
 806    GLvoid *Data;                /* Image data, accessed via FetchTexel() */
 807
 808    FetchTexelFunc FetchTexel;   /* texel fetch function pointer */
 809
 810    GLboolean IsCompressed;      /* GL_ARB_texture_compression */
 811    GLuint CompressedSize;       /* GL_ARB_texture_compression */
 812
 813    /* For device driver: */
 814    void *DriverData;            /* Arbitrary device driver data */
 815 };
 816
 817
 818 /* Texture object record */
 819 struct gl_texture_object {
 820    _glthread_Mutex Mutex;       /* for thread safety */
 821    GLint RefCount;              /* reference count */
 822    GLuint Name;                 /* an unsigned integer */
 823    GLuint Dimensions;           /* 1 or 2 or 3 or 6 (cube map) */
 824    GLfloat Priority;            /* in [0,1] */
 825    GLchan BorderColor[4];
 826    GLenum WrapS;                /* GL_CLAMP, REPEAT or CLAMP_TO_EDGE */
 827    GLenum WrapT;                /* GL_CLAMP, REPEAT or CLAMP_TO_EDGE */
 828    GLenum WrapR;                /* GL_CLAMP, REPEAT or CLAMP_TO_EDGE */
 829    GLenum MinFilter;            /* minification filter */
 830    GLenum MagFilter;            /* magnification filter */
 831    GLfloat MinLod;              /* min lambda, OpenGL 1.2 */
 832    GLfloat MaxLod;              /* max lambda, OpenGL 1.2 */
 833    GLint BaseLevel;             /* min mipmap level, OpenGL 1.2 */
 834    GLint MaxLevel;              /* max mipmap level, OpenGL 1.2 */
 835    GLboolean CompareFlag;       /* GL_SGIX_shadow */
 836    GLenum CompareOperator;      /* GL_SGIX_shadow */
 837    GLchan ShadowAmbient;        /* GL_SGIX_shadow_ambient */
 838    GLint _MaxLevel;             /* actual max mipmap level (q in the spec) */
 839    GLfloat _MaxLambda;          /* = _MaxLevel - BaseLevel (q - b in spec) */
 840    struct gl_texture_image *Image[MAX_TEXTURE_LEVELS];
 841
 842    /* Texture cube faces */
 843    /* Image[] is alias for *PosX[MAX_TEXTURE_LEVELS]; */
 844    struct gl_texture_image *NegX[MAX_TEXTURE_LEVELS];
 845    struct gl_texture_image *PosY[MAX_TEXTURE_LEVELS];
 846    struct gl_texture_image *NegY[MAX_TEXTURE_LEVELS];
 847    struct gl_texture_image *PosZ[MAX_TEXTURE_LEVELS];
 848    struct gl_texture_image *NegZ[MAX_TEXTURE_LEVELS];
 849
 850    /* GL_EXT_paletted_texture */
 851    struct gl_color_table Palette;
 852
 853    GLboolean Complete;                  /* Is texture object complete? */
 854    struct gl_texture_object *Next;      /* Next in linked list */
 855
 856    /* For device driver: */
 857    void *DriverData;    /* Arbitrary device driver data */
 858 };
 859
 860
 861
 862 /*
 863  * Texture units are new with the multitexture extension.
 864  */
 865 struct gl_texture_unit {
 866    GLuint Enabled;              /* bitmask of TEXTURE0_1D, _2D, _3D, _CUBE */
 867    GLuint _ReallyEnabled;       /* 0 or one of TEXTURE0_1D, _2D, _3D, _CUBE */
 868
 869    GLenum EnvMode;              /* GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
 870    GLfloat EnvColor[4];
 871    GLuint TexGenEnabled;        /* Bitwise-OR of [STRQ]_BIT values */
 872    GLenum GenModeS;             /* Tex coord generation mode, either */
 873    GLenum GenModeT;             /*      GL_OBJECT_LINEAR, or */
 874    GLenum GenModeR;             /*      GL_EYE_LINEAR, or    */
 875    GLenum GenModeQ;             /*      GL_SPHERE_MAP        */
 876    GLuint _GenBitS;
 877    GLuint _GenBitT;
 878    GLuint _GenBitR;
 879    GLuint _GenBitQ;
 880    GLuint _GenFlags;            /* bitwise or of GenBit[STRQ] */
 881    GLfloat ObjectPlaneS[4];
 882    GLfloat ObjectPlaneT[4];
 883    GLfloat ObjectPlaneR[4];
 884    GLfloat ObjectPlaneQ[4];
 885    GLfloat EyePlaneS[4];
 886    GLfloat EyePlaneT[4];
 887    GLfloat EyePlaneR[4];
 888    GLfloat EyePlaneQ[4];
 889    GLfloat LodBias;             /* for biasing mipmap levels */
 890
 891    /* GL_EXT_texture_env_combine */
 892    GLenum CombineModeRGB;       /* GL_REPLACE, GL_DECAL, GL_ADD, etc. */
 893    GLenum CombineModeA;         /* GL_REPLACE, GL_DECAL, GL_ADD, etc. */
 894    GLenum CombineSourceRGB[3];  /* GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
 895    GLenum CombineSourceA[3];    /* GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
 896    GLenum CombineOperandRGB[3]; /* SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
 897    GLenum CombineOperandA[3];   /* SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
 898    GLuint CombineScaleShiftRGB; /* 0, 1 or 2 */
 899    GLuint CombineScaleShiftA;   /* 0, 1 or 2 */
 900
 901    struct gl_texture_object *Current1D;
 902    struct gl_texture_object *Current2D;
 903    struct gl_texture_object *Current3D;
 904    struct gl_texture_object *CurrentCubeMap; /* GL_ARB_texture_cube_map */
 905
 906    struct gl_texture_object *_Current; /* Points to really enabled tex obj */
 907
 908    struct gl_texture_object Saved1D;  /* only used by glPush/PopAttrib */
 909    struct gl_texture_object Saved2D;
 910    struct gl_texture_object Saved3D;
 911    struct gl_texture_object SavedCubeMap;
 912 };
 913
 914
 915 struct gl_texture_attrib {
 916    /* multitexture */
 917    GLuint CurrentUnit;            /* Active texture unit */
 918    GLuint CurrentTransformUnit;   /* Client active texture xform unit */
 919
 920    GLuint _ReallyEnabled;     /* enables for all texture units: */
 921                              /* = (Unit[0]._ReallyEnabled << 0) | */
 922                              /*   (Unit[1]._ReallyEnabled << 4) | */
 923                              /*   (Unit[2]._ReallyEnabled << 8) | etc... */
 924    GLuint _GenFlags;  /* for texgen */
 925
 926    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
 927
 928    struct gl_texture_object *Proxy1D;
 929    struct gl_texture_object *Proxy2D;
 930    struct gl_texture_object *Proxy3D;
 931    struct gl_texture_object *ProxyCubeMap;
 932
 933    /* GL_EXT_shared_texture_palette */
 934    GLboolean SharedPalette;
 935    struct gl_color_table Palette;
 936 };
 937
 938
 939 struct gl_transform_attrib {
 940    GLenum MatrixMode;                           /* Matrix mode */
 941    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];
 942    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /* derived */
 943    GLboolean ClipEnabled[MAX_CLIP_PLANES];
 944    GLubyte   _AnyClip;                          /* How many ClipEnabled? */
 945    GLboolean Normalize;                         /* Normalize all normals? */
 946    GLboolean RescaleNormals;                    /* GL_EXT_rescale_normal */
 947 };
 948
 949
 950 struct gl_viewport_attrib {
 951    GLint X, Y;                  /* position */
 952    GLsizei Width, Height;       /* size */
 953    GLfloat Near, Far;           /* Depth buffer range */
 954    GLmatrix _WindowMap;         /* Mapping transformation as a matrix. */
 955 };
 956
 957
 958 /* For the attribute stack: */
 959 struct gl_attrib_node {
 960    GLbitfield kind;
 961    void *data;
 962    struct gl_attrib_node *next;
 963 };
 964
 965
 966
 967 /*
 968  * Client pixel packing/unpacking attributes
 969  */
 970 struct gl_pixelstore_attrib {
 971    GLint Alignment;
 972    GLint RowLength;
 973    GLint SkipPixels;
 974    GLint SkipRows;
 975    GLint ImageHeight;     /* for GL_EXT_texture3D */
 976    GLint SkipImages;      /* for GL_EXT_texture3D */
 977    GLboolean SwapBytes;
 978    GLboolean LsbFirst;
 979 };
 980
 981
 982 /*
 983  * Client vertex array attributes
 984  */
 985 struct gl_client_array {
 986    GLint Size;
 987    GLenum Type;
 988    GLsizei Stride;              /* user-specified stride */
 989    GLsizei StrideB;             /* actual stride in bytes */
 990    void *Ptr;
 991    GLboolean Enabled;
 992 };
 993
 994
 995
 996
 997 struct gl_array_attrib {
 998    struct gl_client_array Vertex;            /* client data descriptors */
 999    struct gl_client_array Normal;
1000    struct gl_client_array Color;
1001    struct gl_client_array SecondaryColor;
1002    struct gl_client_array FogCoord;
1003    struct gl_client_array Index;
1004    struct gl_client_array TexCoord[MAX_TEXTURE_UNITS];
1005    struct gl_client_array EdgeFlag;
1006
1007    GLint TexCoordInterleaveFactor;
1008    GLint ActiveTexture;         /* Client Active Texture */
1009    GLuint LockFirst;
1010    GLuint LockCount;
1011
1012    GLuint _Enabled;             /* _NEW_ARRAY_* - bit set if array enabled */
1013    GLuint NewState;             /* _NEW_ARRAY_* */
1014 };
1015
1016
1017
1018
1019 struct gl_feedback {
1020    GLenum Type;
1021    GLuint _Mask;                /* FB_* bits */
1022    GLfloat *Buffer;
1023    GLuint BufferSize;
1024    GLuint Count;
1025 };
1026
1027
1028
1029 struct gl_selection {
1030    GLuint *Buffer;
1031    GLuint BufferSize;   /* size of SelectBuffer */
1032    GLuint BufferCount;  /* number of values in SelectBuffer */
1033    GLuint Hits;         /* number of records in SelectBuffer */
1034    GLuint NameStackDepth;
1035    GLuint NameStack[MAX_NAME_STACK_DEPTH];
1036    GLboolean HitFlag;
1037    GLfloat HitMinZ, HitMaxZ;
1038 };
1039
1040
1041
1042 /*
1043  * 1-D Evaluator control points
1044  */
1045 struct gl_1d_map {
1046    GLuint Order;        /* Number of control points */
1047    GLfloat u1, u2, du;  /* u1, u2, 1.0/(u2-u1) */
1048    GLfloat *Points;     /* Points to contiguous control points */
1049 };
1050
1051
1052 /*
1053  * 2-D Evaluator control points
1054  */
1055 struct gl_2d_map {
1056    GLuint Uorder;               /* Number of control points in U dimension */
1057    GLuint Vorder;               /* Number of control points in V dimension */
1058    GLfloat u1, u2, du;
1059    GLfloat v1, v2, dv;
1060    GLfloat *Points;             /* Points to contiguous control points */
1061 };
1062
1063
1064 /*
1065  * All evalutator control points
1066  */
1067 struct gl_evaluators {
1068    /* 1-D maps */
1069    struct gl_1d_map Map1Vertex3;
1070    struct gl_1d_map Map1Vertex4;
1071    struct gl_1d_map Map1Index;
1072    struct gl_1d_map Map1Color4;
1073    struct gl_1d_map Map1Normal;
1074    struct gl_1d_map Map1Texture1;
1075    struct gl_1d_map Map1Texture2;
1076    struct gl_1d_map Map1Texture3;
1077    struct gl_1d_map Map1Texture4;
1078
1079    /* 2-D maps */
1080    struct gl_2d_map Map2Vertex3;
1081    struct gl_2d_map Map2Vertex4;
1082    struct gl_2d_map Map2Index;
1083    struct gl_2d_map Map2Color4;
1084    struct gl_2d_map Map2Normal;
1085    struct gl_2d_map Map2Texture1;
1086    struct gl_2d_map Map2Texture2;
1087    struct gl_2d_map Map2Texture3;
1088    struct gl_2d_map Map2Texture4;
1089 };
1090
1091
1092
1093 /*
1094  * State which can be shared by multiple contexts:
1095  */
1096 struct gl_shared_state {
1097    _glthread_Mutex Mutex;                  /* for thread safety */
1098    GLint RefCount;                         /* Reference count */
1099    struct _mesa_HashTable *DisplayList;    /* Display lists hash table */
1100    struct _mesa_HashTable *TexObjects;     /* Texture objects hash table */
1101    struct gl_texture_object *TexObjectList;/* Linked list of texture objects */
1102
1103    /* Default texture objects (shared by all multi-texture units) */
1104    struct gl_texture_object *Default1D;
1105    struct gl_texture_object *Default2D;
1106    struct gl_texture_object *Default3D;
1107    struct gl_texture_object *DefaultCubeMap;
1108
1109    void *DriverData;  /* Device driver shared state */
1110 };
1111
1112
1113
1114 /*
1115  * A "frame buffer" is a color buffer and its optional ancillary buffers:
1116  * depth, accum, stencil, and software-simulated alpha buffers.
1117  * In C++ terms, think of this as a base class from which device drivers
1118  * will make derived classes.
1119  */
1120 struct gl_frame_buffer {
1121    GLvisual *Visual;            /* The corresponding visual */
1122
1123    GLint Width, Height;         /* size of frame buffer in pixels */
1124
1125    GLboolean UseSoftwareDepthBuffer;
1126    GLboolean UseSoftwareAccumBuffer;
1127    GLboolean UseSoftwareStencilBuffer;
1128    GLboolean UseSoftwareAlphaBuffers;
1129
1130    /* Software depth (aka Z) buffer */
1131    GLvoid *DepthBuffer;         /* array [Width*Height] of GLushort or GLuint*/
1132
1133    /* Software stencil buffer */
1134    GLstencil *Stencil;          /* array [Width*Height] of GLstencil values */
1135
1136    /* Software accumulation buffer */
1137    GLaccum *Accum;              /* array [4*Width*Height] of GLaccum values */
1138
1139    /* Software alpha planes */
1140    GLchan *FrontLeftAlpha;      /* array [Width*Height] of GLubyte */
1141    GLchan *BackLeftAlpha;       /* array [Width*Height] of GLubyte */
1142    GLchan *FrontRightAlpha;     /* array [Width*Height] of GLubyte */
1143    GLchan *BackRightAlpha;      /* array [Width*Height] of GLubyte */
1144    GLchan *Alpha;               /* Points to current alpha buffer */
1145
1146    /* Drawing bounds: intersection of window size and scissor box */
1147    GLint _Xmin, _Ymin;  /* inclusive */
1148    GLint _Xmax, _Ymax;  /* exclusive */
1149 };
1150
1151
1152 /*
1153  * Constants which may be overriden by device driver.
1154  */
1155 struct gl_constants {
1156    GLint MaxTextureSize;
1157    GLint MaxCubeTextureSize;
1158    GLint MaxTextureLevels;
1159    GLuint MaxTextureUnits;
1160    GLuint MaxArrayLockSize;
1161    GLint SubPixelBits;
1162    GLfloat MinPointSize, MaxPointSize;          /* aliased */
1163    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
1164    GLfloat PointSizeGranularity;
1165    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
1166    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
1167    GLfloat LineWidthGranularity;
1168    GLuint NumAuxBuffers;
1169    GLuint MaxColorTableSize;
1170    GLuint MaxConvolutionWidth;
1171    GLuint MaxConvolutionHeight;
1172    GLuint NumCompressedTextureFormats;  /* GL_ARB_texture_compression */
1173    GLenum CompressedTextureFormats[MAX_COMPRESSED_TEXTURE_FORMATS];
1174    GLuint MaxClipPlanes;
1175    GLuint MaxLights;
1176 };
1177
1178
1179 /*
1180  * List of extensions.
1181  */
1182 struct extension;
1183 struct gl_extensions {
1184    char *ext_string;
1185    struct extension *ext_list;
1186    /* Flags to quickly test if certain extensions are available.
1187     * Not every extension needs to have such a flag, but it's encouraged.
1188     */
1189    GLboolean ARB_imaging;
1190    GLboolean ARB_multitexture;
1191    GLboolean ARB_texture_compression;
1192    GLboolean ARB_texture_cube_map;
1193    GLboolean ARB_texture_env_add;
1194    GLboolean EXT_blend_color;
1195    GLboolean EXT_blend_func_separate;
1196    GLboolean EXT_blend_logic_op;
1197    GLboolean EXT_blend_minmax;
1198    GLboolean EXT_blend_subtract;
1199    GLboolean EXT_clip_volume_hint;
1200    GLboolean EXT_convolution;
1201    GLboolean EXT_compiled_vertex_array;
1202    GLboolean EXT_fog_coord;
1203    GLboolean EXT_histogram;
1204    GLboolean EXT_packed_pixels;
1205    GLboolean EXT_paletted_texture;
1206    GLboolean EXT_point_parameters;
1207    GLboolean EXT_polygon_offset;
1208    GLboolean EXT_rescale_normal;
1209    GLboolean EXT_secondary_color;
1210    GLboolean EXT_shared_texture_palette;
1211    GLboolean EXT_stencil_wrap;
1212    GLboolean EXT_texture3D;
1213    GLboolean EXT_texture_compression_s3tc;
1214    GLboolean EXT_texture_env_add;
1215    GLboolean EXT_texture_env_combine;
1216    GLboolean EXT_texture_env_dot3;
1217    GLboolean EXT_texture_object;
1218    GLboolean EXT_texture_lod_bias;
1219    GLboolean EXT_vertex_array_set;
1220    GLboolean HP_occlusion_test;
1221    GLboolean INGR_blend_func_separate;
1222    GLboolean MESA_window_pos;
1223    GLboolean MESA_resize_buffers;
1224    GLboolean MESA_sprite_point;
1225    GLboolean NV_blend_square;
1226    GLboolean NV_texgen_reflection;
1227    GLboolean SGI_color_matrix;
1228    GLboolean SGI_color_table;
1229    GLboolean SGIS_pixel_texture;
1230    GLboolean SGIS_texture_edge_clamp;
1231    GLboolean SGIX_depth_texture;
1232    GLboolean SGIX_pixel_texture;
1233    GLboolean SGIX_shadow;
1234    GLboolean SGIX_shadow_ambient;
1235    GLboolean _3DFX_texture_compression_FXT1;
1236 };
1237
1238
1239
1240 /*
1241  * Bits for image transfer operations (ctx->ImageTransferState).
1242  */
1243 #define IMAGE_SCALE_BIAS_BIT                      0x1
1244 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
1245 #define IMAGE_MAP_COLOR_BIT                       0x4
1246 #define IMAGE_COLOR_TABLE_BIT                     0x8
1247 #define IMAGE_CONVOLUTION_BIT                     0x10
1248 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
1249 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
1250 #define IMAGE_COLOR_MATRIX_BIT                    0x80
1251 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
1252 #define IMAGE_HISTOGRAM_BIT                       0x200
1253 #define IMAGE_MIN_MAX_BIT                         0x400
1254
1255 /* transfer ops up to convolution: */
1256 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
1257                                     IMAGE_SHIFT_OFFSET_BIT |   \
1258                                     IMAGE_MAP_COLOR_BIT |      \
1259                                     IMAGE_COLOR_TABLE_BIT)
1260
1261 /* transfer ops after convolution: */
1262 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
1263                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
1264                                      IMAGE_COLOR_MATRIX_BIT |                 \
1265                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
1266                                      IMAGE_HISTOGRAM_BIT |                    \
1267                                      IMAGE_MIN_MAX_BIT)
1268
1269
1270 /*
1271  * Bits to indicate what state has changed.  6 unused flags.
1272  */
1273 #define _NEW_MODELVIEW          0x1        /* ctx->ModelView */
1274 #define _NEW_PROJECTION         0x2        /* ctx->Projection */
1275 #define _NEW_TEXTURE_MATRIX     0x4        /* ctx->TextureMatrix */
1276 #define _NEW_COLOR_MATRIX       0x8        /* ctx->ColorMatrix */
1277 #define _NEW_ACCUM              0x10       /* ctx->Accum */
1278 #define _NEW_COLOR              0x20       /* ctx->Color */
1279 #define _NEW_DEPTH              0x40       /* ctx->Depth */
1280 #define _NEW_EVAL               0x80       /* ctx->Eval, ctx->EvalMap */
1281 #define _NEW_FOG                0x100      /* ctx->Fog */
1282 #define _NEW_HINT               0x200      /* ctx->Hint */
1283 #define _NEW_400                0x400      /*  */
1284 #define _NEW_LIGHT              0x800      /* ctx->Light */
1285 #define _NEW_1000               0x1000     /*  */
1286 #define _NEW_LINE               0x2000     /* ctx->Line */
1287 #define _NEW_4000               0x4000     /*  */
1288 #define _NEW_PIXEL              0x8000     /* ctx->Pixel */
1289 #define _NEW_POINT              0x10000    /* ctx->Point */
1290 #define _NEW_POLYGON            0x20000    /* ctx->Polygon */
1291 #define _NEW_POLYGONSTIPPLE     0x40000    /* ctx->PolygonStipple */
1292 #define _NEW_SCISSOR            0x80000    /* ctx->Scissor */
1293 #define _NEW_STENCIL            0x100000   /* ctx->Stencil */
1294 #define _NEW_TEXTURE            0x200000   /* ctx->Texture */
1295 #define _NEW_TRANSFORM          0x400000   /* ctx->Transform */
1296 #define _NEW_VIEWPORT           0x800000   /* ctx->Viewport */
1297 #define _NEW_PACKUNPACK         0x1000000  /* ctx->Pack, ctx->Unpack */
1298 #define _NEW_ARRAY              0x2000000  /* ctx->Array */
1299 #define _NEW_COLORTABLE         0x4000000  /* ctx->{*}ColorTable */
1300 #define _NEW_RENDERMODE         0x8000000  /* RenderMode, Feedback, Select */
1301 #define _NEW_BUFFERS            0x10000000 /* ctx->Visual, ctx->DrawBuffer, */
1302
1303 #define _NEW_ALL ~0
1304
1305
1306
1307 /* Bits to track array state changes (also used to summarize array enabled)
1308  */
1309 #define _NEW_ARRAY_VERTEX           0x1
1310 #define _NEW_ARRAY_COLOR            0x2
1311 #define _NEW_ARRAY_NORMAL           0x4
1312 #define _NEW_ARRAY_INDEX            0x8
1313 #define _NEW_ARRAY_EDGEFLAG         0x10
1314 #define _NEW_ARRAY_SECONDARYCOLOR   0x20
1315 #define _NEW_ARRAY_FOGCOORD         0x40
1316 #define _NEW_ARRAY_TEXCOORD_0       0x80
1317 #define _NEW_ARRAY_TEXCOORD_1       0x100
1318 #define _NEW_ARRAY_TEXCOORD_2       0x200
1319 #define _NEW_ARRAY_TEXCOORD_3       0x400
1320 #define _NEW_ARRAY_TEXCOORD_4       0x800
1321 #define _NEW_ARRAY_TEXCOORD_5       0x1000
1322 #define _NEW_ARRAY_TEXCOORD_6       0x2000
1323 #define _NEW_ARRAY_TEXCOORD_7       0x4000
1324 #define _NEW_ARRAY_ALL              0x7fff
1325
1326 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0<<(i))
1327
1328 /* A bunch of flags that we think might be useful to drivers.
1329  */
1330 #define DD_FEEDBACK                 0x1
1331 #define DD_SELECT                   0x2
1332 #define DD_FLATSHADE                0x4
1333 #define DD_SEPERATE_SPECULAR        0x10
1334 #define DD_TRI_LIGHT_TWOSIDE        0x20
1335 #define DD_TRI_UNFILLED             0x40
1336 #define DD_TRI_SMOOTH               0x80
1337 #define DD_TRI_STIPPLE              0x100
1338 #define DD_TRI_OFFSET               0x200
1339 #define DD_LINE_SMOOTH              0x800
1340 #define DD_LINE_STIPPLE             0x1000
1341 #define DD_LINE_WIDTH               0x2000
1342 #define DD_POINT_SMOOTH             0x4000
1343 #define DD_POINT_SIZE               0x8000
1344 #define DD_POINT_ATTEN              0x10000
1345 #define DD_TRI_CULL_FRONT_BACK      0x400000 /* special case on some hw */
1346 #define DD_Z_NEVER                  0x800000 /* special case on some hw */
1347 #define DD_STENCIL                  0x1000000
1348
1349 /* Define the state changes under which each of these bits might change
1350  */
1351 #define _DD_NEW_FEEDBACK                 _NEW_RENDERMODE
1352 #define _DD_NEW_SELECT                   _NEW_RENDERMODE
1353 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
1354 #define _DD_NEW_MULTIDRAW                _NEW_COLOR
1355 #define _DD_NEW_SEPERATE_SPECULAR        (_NEW_LIGHT|_NEW_FOG)
1356 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
1357 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
1358 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
1359 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
1360 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
1361 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
1362 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
1363 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
1364 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
1365 #define _DD_NEW_POINT_SIZE               _NEW_POINT
1366 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
1367 #define _DD_NEW_LIGHTING_CULL            _NEW_LIGHT
1368 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
1369 #define _DD_NEW_Z_NEVER                  _NEW_DEPTH
1370 #define _DD_NEW_STENCIL                  _NEW_STENCIL
1371
1372
1373 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT|          \
1374                                             _NEW_TEXTURE|               \
1375                                             _NEW_POINT|         \
1376                                             _NEW_MODELVIEW)
1377
1378 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT|          \
1379                                             _NEW_TEXTURE)
1380 #define _IMAGE_NEW_TRANSFER_STATE        (_NEW_PIXEL|_NEW_COLOR_MATRIX)
1381
1382
1383 #define NEED_NORMALS_TEXGEN      0x1
1384 #define NEED_NORMALS_LIGHT       0x2
1385
1386 #define NEED_EYE_TEXGEN          0x1
1387 #define NEED_EYE_LIGHT           0x2
1388 #define NEED_EYE_LIGHT_MODELVIEW 0x4
1389 #define NEED_EYE_POINT_ATTEN     0x8
1390
1391
1392
1393 /*
1394  * Forward declaration of display list datatypes:
1395  */
1396 union node;
1397 typedef union node Node;
1398
1399
1400
1401
1402
1403 /* This has to be included here. */
1404 #include "dd.h"
1405
1406
1407 /*
1408  * The library context:
1409  */
1410 struct __GLcontextRec {
1411    /*
1412    ** Os related interfaces; these *must* be the first members of this
1413    ** structure, because they are exposed to the outside world (i.e. GLX
1414    ** extension).
1415    */
1416    __GLimports imports;
1417    __GLexports exports;
1418
1419    /* State possibly shared with other contexts in the address space */
1420    struct gl_shared_state *Shared;
1421
1422    /* API function pointer tables */
1423    struct _glapi_table *Save;   /* Display list save funcs */
1424    struct _glapi_table *Exec;   /* Execute funcs */
1425    struct _glapi_table *CurrentDispatch;  /* == Save or Exec !! */
1426
1427    GLboolean ExecPrefersFloat;  /* What preference for color conversion? */
1428    GLboolean SavePrefersFloat;
1429
1430    GLvisual Visual;
1431    GLframebuffer *DrawBuffer;   /* buffer for writing */
1432    GLframebuffer *ReadBuffer;   /* buffer for reading */
1433
1434    /* Driver function pointer table */
1435    struct dd_function_table Driver;
1436
1437    void *DriverCtx;     /* Points to device driver context/state */
1438    void *DriverMgrCtx;  /* Points to device driver manager (optional)*/
1439
1440    /* Core/Driver constants */
1441    struct gl_constants Const;
1442
1443    /* Modelview matrix and stack */
1444    GLmatrix ModelView;           /* current matrix, not stored on stack */
1445    GLuint ModelViewStackDepth;
1446    GLmatrix ModelViewStack[MAX_MODELVIEW_STACK_DEPTH - 1];
1447
1448    /* Projection matrix and stack */
1449    GLmatrix ProjectionMatrix;    /* current matrix, not stored on stack */
1450    GLuint ProjectionStackDepth;
1451    GLmatrix ProjectionStack[MAX_PROJECTION_STACK_DEPTH - 1];
1452
1453    /* Combined modelview and projection matrix */
1454    GLmatrix _ModelProjectMatrix;
1455
1456    /* Texture matrix and stack */
1457    GLmatrix TextureMatrix[MAX_TEXTURE_UNITS];
1458    GLuint TextureStackDepth[MAX_TEXTURE_UNITS];
1459    GLmatrix TextureStack[MAX_TEXTURE_UNITS][MAX_TEXTURE_STACK_DEPTH - 1];
1460
1461    /* Color matrix and stack */
1462    GLmatrix ColorMatrix;
1463    GLuint ColorStackDepth;
1464    GLmatrix ColorStack[MAX_COLOR_STACK_DEPTH - 1];
1465
1466    /* Display lists */
1467    GLuint CallDepth;            /* Current recursion calling depth */
1468    GLboolean ExecuteFlag;       /* Execute GL commands? */
1469    GLboolean CompileFlag;       /* Compile GL commands into display list? */
1470    Node *CurrentListPtr;        /* Head of list being compiled */
1471    GLuint CurrentListNum;       /* Number of the list being compiled */
1472    Node *CurrentBlock;          /* Pointer to current block of nodes */
1473    GLuint CurrentPos;           /* Index into current block of nodes */
1474
1475    /* Extensions */
1476    struct gl_extensions Extensions;
1477
1478    /* Renderer attribute stack */
1479    GLuint AttribStackDepth;
1480    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
1481
1482    /* Renderer attribute groups */
1483    struct gl_accum_attrib       Accum;
1484    struct gl_colorbuffer_attrib Color;
1485    struct gl_current_attrib     Current;
1486    struct gl_depthbuffer_attrib Depth;
1487    struct gl_eval_attrib        Eval;
1488    struct gl_fog_attrib         Fog;
1489    struct gl_hint_attrib        Hint;
1490    struct gl_light_attrib       Light;
1491    struct gl_line_attrib        Line;
1492    struct gl_list_attrib        List;
1493    struct gl_pixel_attrib       Pixel;
1494    struct gl_point_attrib       Point;
1495    struct gl_polygon_attrib     Polygon;
1496    GLuint PolygonStipple[32];
1497    struct gl_scissor_attrib     Scissor;
1498    struct gl_stencil_attrib     Stencil;
1499    struct gl_texture_attrib     Texture;
1500    struct gl_transform_attrib   Transform;
1501    struct gl_viewport_attrib    Viewport;
1502
1503    /* Other attribute groups */
1504    struct gl_histogram_attrib   Histogram;
1505    struct gl_minmax_attrib      MinMax;
1506    struct gl_convolution_attrib Convolution1D;
1507    struct gl_convolution_attrib Convolution2D;
1508    struct gl_convolution_attrib Separable2D;
1509
1510    /* Client attribute stack */
1511    GLuint ClientAttribStackDepth;
1512    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
1513
1514    /* Client attribute groups */
1515    struct gl_array_attrib       Array;  /* Vertex arrays */
1516    struct gl_pixelstore_attrib  Pack;   /* Pixel packing */
1517    struct gl_pixelstore_attrib  Unpack; /* Pixel unpacking */
1518
1519    struct gl_evaluators EvalMap;   /* All evaluators */
1520    struct gl_feedback   Feedback;  /* Feedback */
1521    struct gl_selection  Select;    /* Selection */
1522
1523    struct gl_color_table ColorTable;       /* Pre-convolution */
1524    struct gl_color_table ProxyColorTable;  /* Pre-convolution */
1525    struct gl_color_table PostConvolutionColorTable;
1526    struct gl_color_table ProxyPostConvolutionColorTable;
1527    struct gl_color_table PostColorMatrixColorTable;
1528    struct gl_color_table ProxyPostColorMatrixColorTable;
1529
1530    GLenum ErrorValue;        /* Last error code */
1531    GLenum RenderMode;        /* either GL_RENDER, GL_SELECT, GL_FEEDBACK */
1532    GLuint NewState;          /* bitwise-or of _NEW_* flags */
1533
1534    /* Derived */
1535    GLuint _Enabled;           /* bitwise-or of ENABLE_* flags */
1536    GLuint _TriangleCaps;      /* bitwise-or of DD_* flags */
1537    GLuint _ImageTransferState;/* bitwise-or of IMAGE_*_BIT flags */
1538    GLfloat _EyeZDir[3];
1539    GLfloat _ModelViewInvScale;
1540    GLuint _NeedEyeCoords;
1541    GLuint _NeedNormals;    /* Are vertex normal vectors needed? */
1542
1543    struct gl_shine_tab *_ShineTable[2];  /* Active shine tables */
1544    struct gl_shine_tab *_ShineTabList;   /* Mru list of inactive shine tables */
1545
1546    struct gl_list_extensions listext; /* driver dlist extensions */
1547
1548
1549    GLboolean OcclusionResult;  /* GL_HP_occlusion_test */
1550    GLboolean OcclusionResultSaved;  /* GL_HP_occlusion_test */
1551
1552    /* Z buffer stuff */
1553    GLuint DepthMax;             /* Max depth buffer value */
1554    GLfloat DepthMaxF;           /* Float max depth buffer value */
1555    GLfloat MRD;                 /* minimum resolvable difference in Z values */
1556
1557    /* Should 3Dfx Glide driver catch signals? */
1558    GLboolean CatchSignals;
1559
1560    /* For debugging/development only */
1561    GLboolean NoRaster;
1562    GLboolean FirstTimeCurrent;
1563
1564    /* Dither disable via MESA_NO_DITHER env var */
1565    GLboolean NoDither;
1566
1567    GLboolean Rendering;
1568
1569 #if defined(MESA_TRACE)
1570    struct _glapi_table *TraceDispatch;
1571    trace_context_t     *TraceCtx;
1572 #else
1573    void *TraceDispatch;
1574    void *TraceCtx;
1575 #endif
1576
1577    /* Hooks for module contexts.  These will eventually live
1578     * in the driver or elsewhere.
1579     */
1580    void *swrast_context;
1581    void *swsetup_context;
1582    void *swtnl_context;
1583    void *swtnl_im;
1584    void *acache_context;
1585    void *aelt_context;
1586 };
1587
1588
1589 /* The string names for GL_POINT, GL_LINE_LOOP, etc */
1590 extern const char *_mesa_prim_name[GL_POLYGON+4];
1591 extern GLenum gl_reduce_prim[];
1592
1593
1594 #ifdef MESA_DEBUG
1595 extern int MESA_VERBOSE;
1596 extern int MESA_DEBUG_FLAGS;
1597 #else
1598 # define MESA_VERBOSE 0
1599 # define MESA_DEBUG_FLAGS 0
1600 # ifndef NDEBUG
1601 #  define NDEBUG
1602 # endif
1603 #endif
1604
1605
1606 enum _verbose {
1607    VERBOSE_VARRAY          = 0x1,
1608    VERBOSE_TEXTURE         = 0x2,
1609    VERBOSE_IMMEDIATE       = 0x4,
1610    VERBOSE_PIPELINE        = 0x8,
1611    VERBOSE_DRIVER          = 0x10,
1612    VERBOSE_STATE           = 0x20,
1613    VERBOSE_API             = 0x40,
1614    VERBOSE_DISPLAY_LIST    = 0x200,
1615    VERBOSE_LIGHTING        = 0x400
1616 };
1617
1618
1619 enum _debug {
1620    DEBUG_ALWAYS_FLUSH          = 0x1
1621 };
1622
1623
1624
1625 #define Elements(x) sizeof(x)/sizeof(*(x))
1626
1627
1628
1629 /* Eventually let the driver specify what statechanges require a flush:
1630  */
1631 #define FLUSH_VERTICES(ctx, newstate)                   \
1632 do {                                                    \
1633    if (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES)   \
1634       ctx->Driver.FlushVertices(ctx, FLUSH_STORED_VERTICES);    \
1635    ctx->NewState |= newstate;                           \
1636 } while (0)
1637
1638 #define FLUSH_CURRENT(ctx, newstate)                    \
1639 do {                                                    \
1640    if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT)    \
1641       ctx->Driver.FlushVertices(ctx, FLUSH_UPDATE_CURRENT);     \
1642    ctx->NewState |= newstate;                           \
1643 } while (0)
1644
1645 #define ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval)       \
1646 do {                                                            \
1647    if (ctx->Driver.CurrentExecPrimitive != GL_POLYGON+1) {      \
1648       gl_error( ctx, GL_INVALID_OPERATION, "begin/end" );       \
1649       return retval;                                            \
1650    }                                                            \
1651 } while (0)
1652
1653 #define ASSERT_OUTSIDE_BEGIN_END(ctx) \
1654    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx,)
1655
1656 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx) \
1657 do {                                            \
1658    ASSERT_OUTSIDE_BEGIN_END(ctx);               \
1659    FLUSH_VERTICES(ctx, 0);                      \
1660 } while (0)
1661
1662 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx, retval)     \
1663 do {                                                                    \
1664    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval);                   \
1665    FLUSH_VERTICES(ctx, 0);                                              \
1666 } while (0)
1667
1668
1669 #ifdef DEBUG
1670
1671 #define RENDER_START(CTX)                       \
1672    do {                                         \
1673       assert(!(CTX)->Rendering);                \
1674       (CTX)->Rendering = GL_TRUE;               \
1675       if ((CTX)->Driver.RenderStart) {          \
1676          (*(CTX)->Driver.RenderStart)(CTX);     \
1677       }                                         \
1678    } while (0)
1679
1680 #define RENDER_FINISH(CTX)                      \
1681    do {                                         \
1682       assert((CTX)->Rendering);                 \
1683       (CTX)->Rendering = GL_FALSE;              \
1684       if ((CTX)->Driver.RenderFinish) {         \
1685          (*(CTX)->Driver.RenderFinish)(CTX);    \
1686       }                                         \
1687    } while (0)
1688
1689 #else
1690
1691 #define RENDER_START(CTX)                       \
1692    do {                                         \
1693       if ((CTX)->Driver.RenderStart) {          \
1694          (*(CTX)->Driver.RenderStart)(CTX);     \
1695       }                                         \
1696    } while (0)
1697
1698 #define RENDER_FINISH(CTX)                      \
1699    do {                                         \
1700       if ((CTX)->Driver.RenderFinish) {         \
1701          (*(CTX)->Driver.RenderFinish)(CTX);    \
1702       }                                         \
1703    } while (0)
1704
1705 #endif
1706
1707
1708 #endif /* TYPES_H */