src/mesa/main/mtypes.h

   1 /* $Id: mtypes.h,v 1.14 2001/01/23 23:39:36 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_object;
 120 typedef struct __GLcontextRec GLcontext;
 121 typedef struct __GLcontextModesRec GLvisual;
 122 typedef struct gl_frame_buffer GLframebuffer;
 123
 124
 125
 126 /* Maximum number of temporary vertices required for clipping.  (Used
 127  * in array_cache and tnl modules).
 128  */
 129 #define MAX_CLIPPED_VERTICES ((2 * (6 + MAX_CLIP_PLANES))+1)
 130
 131
 132 /* Data structure for color tables */
 133 struct gl_color_table {
 134    GLvoid *Table;
 135    GLboolean FloatTable;  /* entries stored as floats? (or GLchan type) */
 136    GLuint Size;           /* number of entries (rows) in table */
 137    GLenum Format;
 138    GLenum IntFormat;
 139    GLint RedSize;
 140    GLint GreenSize;
 141    GLint BlueSize;
 142    GLint AlphaSize;
 143    GLint LuminanceSize;
 144    GLint IntensitySize;
 145 };
 146
 147
 148 /*
 149  * Bit flags used for updating material values.
 150  */
 151 #define FRONT_AMBIENT_BIT     0x1
 152 #define BACK_AMBIENT_BIT      0x2
 153 #define FRONT_DIFFUSE_BIT     0x4
 154 #define BACK_DIFFUSE_BIT      0x8
 155 #define FRONT_SPECULAR_BIT   0x10
 156 #define BACK_SPECULAR_BIT    0x20
 157 #define FRONT_EMISSION_BIT   0x40
 158 #define BACK_EMISSION_BIT    0x80
 159 #define FRONT_SHININESS_BIT 0x100
 160 #define BACK_SHININESS_BIT  0x200
 161 #define FRONT_INDEXES_BIT   0x400
 162 #define BACK_INDEXES_BIT    0x800
 163
 164 #define FRONT_MATERIAL_BITS     (FRONT_EMISSION_BIT | FRONT_AMBIENT_BIT | \
 165                                  FRONT_DIFFUSE_BIT | FRONT_SPECULAR_BIT | \
 166                                  FRONT_SHININESS_BIT | FRONT_INDEXES_BIT)
 167
 168 #define BACK_MATERIAL_BITS      (BACK_EMISSION_BIT | BACK_AMBIENT_BIT | \
 169                                  BACK_DIFFUSE_BIT | BACK_SPECULAR_BIT | \
 170                                  BACK_SHININESS_BIT | BACK_INDEXES_BIT)
 171
 172 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 173
 174
 175
 176 /*
 177  * Specular exponent and material shininess lookup table sizes:
 178  */
 179 #define EXP_TABLE_SIZE 512
 180 #define SHINE_TABLE_SIZE 256
 181
 182 struct gl_shine_tab {
 183    struct gl_shine_tab *next, *prev;
 184    GLfloat tab[SHINE_TABLE_SIZE+1];
 185    GLfloat shininess;
 186    GLuint refcount;
 187 };
 188
 189
 190 struct gl_light {
 191    struct gl_light *next;               /* double linked list with sentinel */
 192    struct gl_light *prev;
 193
 194    GLfloat Ambient[4];          /* ambient color */
 195    GLfloat Diffuse[4];          /* diffuse color */
 196    GLfloat Specular[4];         /* specular color */
 197    GLfloat EyePosition[4];      /* position in eye coordinates */
 198    GLfloat EyeDirection[4];     /* spotlight dir in eye coordinates */
 199    GLfloat SpotExponent;
 200    GLfloat SpotCutoff;          /* in degress */
 201    GLfloat _CosCutoff;          /* = MAX(0, cos(SpotCutoff)) */
 202    GLfloat ConstantAttenuation;
 203    GLfloat LinearAttenuation;
 204    GLfloat QuadraticAttenuation;
 205    GLboolean Enabled;           /* On/off flag */
 206
 207    /* Derived fields */
 208    GLuint _Flags;               /* State */
 209
 210    GLfloat _Position[4];        /* position in eye/obj coordinates */
 211    GLfloat _VP_inf_norm[3];     /* Norm direction to infinite light */
 212    GLfloat _h_inf_norm[3];      /* Norm( _VP_inf_norm + <0,0,1> ) */
 213    GLfloat _NormDirection[4];   /* normalized spotlight direction */
 214    GLfloat _VP_inf_spot_attenuation;
 215
 216    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /* to replace a pow() call */
 217    GLfloat _MatAmbient[2][3];   /* material ambient * light ambient */
 218    GLfloat _MatDiffuse[2][3];   /* material diffuse * light diffuse */
 219    GLfloat _MatSpecular[2][3];  /* material spec * light specular */
 220    GLfloat _dli;                        /* CI diffuse light intensity */
 221    GLfloat _sli;                        /* CI specular light intensity */
 222 };
 223
 224
 225 struct gl_lightmodel {
 226    GLfloat Ambient[4];          /* ambient color */
 227    GLboolean LocalViewer;       /* Local (or infinite) view point? */
 228    GLboolean TwoSide;           /* Two (or one) sided lighting? */
 229    GLenum ColorControl;         /* either GL_SINGLE_COLOR */
 230                                 /* or GL_SEPARATE_SPECULAR_COLOR */
 231 };
 232
 233
 234 struct gl_material
 235 {
 236    GLfloat Ambient[4];
 237    GLfloat Diffuse[4];
 238    GLfloat Specular[4];
 239    GLfloat Emission[4];
 240    GLfloat Shininess;
 241    GLfloat AmbientIndex;        /* for color index lighting */
 242    GLfloat DiffuseIndex;        /* for color index lighting */
 243    GLfloat SpecularIndex;       /* for color index lighting */
 244 };
 245
 246
 247 /*
 248  * Attribute structures:
 249  *    We define a struct for each attribute group to make pushing and
 250  *    popping attributes easy.  Also it's a good organization.
 251  */
 252 struct gl_accum_attrib {
 253    GLfloat ClearColor[4];       /* Accumulation buffer clear color */
 254 };
 255
 256
 257 /*
 258  * Used in DrawDestMask below
 259  */
 260 #define FRONT_LEFT_BIT  1
 261 #define FRONT_RIGHT_BIT 2
 262 #define BACK_LEFT_BIT   4
 263 #define BACK_RIGHT_BIT  8
 264
 265
 266 struct gl_colorbuffer_attrib {
 267    GLuint ClearIndex;                   /* Index to use for glClear */
 268    GLfloat ClearColor[4];               /* Color to use for glClear */
 269
 270    GLuint IndexMask;                    /* Color index write mask */
 271    GLubyte ColorMask[4];                /* Each flag is 0xff or 0x0 */
 272
 273    GLenum DrawBuffer;                   /* Which buffer to draw into */
 274    GLenum DriverDrawBuffer;             /* Current device driver dest buffer */
 275    GLboolean MultiDrawBuffer;           /* Drawing to mutliple buffers? */
 276    GLubyte DrawDestMask;                /* bitwise-OR of bitflags above */
 277
 278    /* alpha testing */
 279    GLboolean AlphaEnabled;              /* Alpha test enabled flag */
 280    GLenum AlphaFunc;                    /* Alpha test function */
 281    GLchan AlphaRef;                     /* Alpha ref value as GLchan */
 282
 283    /* blending */
 284    GLboolean BlendEnabled;              /* Blending enabled flag */
 285    GLenum BlendSrcRGB;                  /* Blending source operator */
 286    GLenum BlendDstRGB;                  /* Blending destination operator */
 287    GLenum BlendSrcA;                    /* GL_INGR_blend_func_separate */
 288    GLenum BlendDstA;                    /* GL_INGR_blend_func_separate */
 289    GLenum BlendEquation;
 290    GLfloat BlendColor[4];
 291
 292    /* logic op */
 293    GLenum LogicOp;                      /* Logic operator */
 294    GLboolean IndexLogicOpEnabled;       /* Color index logic op enabled flag */
 295    GLboolean ColorLogicOpEnabled;       /* RGBA logic op enabled flag */
 296
 297    GLboolean DitherFlag;                /* Dither enable flag */
 298 };
 299
 300
 301 struct gl_current_attrib {
 302    /* These values valid only when FLUSH_VERTICES has been called.
 303     */
 304    GLfloat Normal[3];                           /* Current vertex normal */
 305    GLchan Color[4];                             /* Current RGBA color */
 306    GLchan SecondaryColor[4];                    /* Current secondary color */
 307    GLfloat FogCoord;                            /* Current Fog coord */
 308    GLuint Index;                                /* Current color index */
 309    GLboolean EdgeFlag;                          /* Current edge flag */
 310    GLfloat Texcoord[MAX_TEXTURE_UNITS][4];      /* Current texture coords */
 311
 312    /* These values are always valid.
 313     */
 314    GLfloat RasterPos[4];                        /* Current raster position */
 315    GLfloat RasterDistance;                      /* Current raster distance */
 316    GLfloat RasterColor[4];                      /* Current raster color */
 317    GLuint  RasterIndex;                         /* Current raster index */
 318    GLfloat *RasterTexCoord;                     /* Current raster texcoord*/
 319    GLfloat RasterMultiTexCoord[MAX_TEXTURE_UNITS][4];
 320    GLboolean RasterPosValid;                    /* Raster po valid flag */
 321 };
 322
 323
 324 struct gl_depthbuffer_attrib {
 325    GLenum Func;                 /* Function for depth buffer compare */
 326    GLfloat Clear;               /* Value to clear depth buffer to */
 327    GLboolean Test;              /* Depth buffering enabled flag */
 328    GLboolean Mask;              /* Depth buffer writable? */
 329    GLboolean OcclusionTest;     /* GL_HP_occlusion_test */
 330 };
 331
 332
 333 struct gl_enable_attrib {
 334    GLboolean AlphaTest;
 335    GLboolean AutoNormal;
 336    GLboolean Blend;
 337    GLboolean ClipPlane[MAX_CLIP_PLANES];
 338    GLboolean ColorMaterial;
 339    GLboolean Convolution1D;
 340    GLboolean Convolution2D;
 341    GLboolean Separable2D;
 342    GLboolean CullFace;
 343    GLboolean DepthTest;
 344    GLboolean Dither;
 345    GLboolean Fog;
 346    GLboolean Histogram;
 347    GLboolean Light[MAX_LIGHTS];
 348    GLboolean Lighting;
 349    GLboolean LineSmooth;
 350    GLboolean LineStipple;
 351    GLboolean IndexLogicOp;
 352    GLboolean ColorLogicOp;
 353    GLboolean Map1Color4;
 354    GLboolean Map1Index;
 355    GLboolean Map1Normal;
 356    GLboolean Map1TextureCoord1;
 357    GLboolean Map1TextureCoord2;
 358    GLboolean Map1TextureCoord3;
 359    GLboolean Map1TextureCoord4;
 360    GLboolean Map1Vertex3;
 361    GLboolean Map1Vertex4;
 362    GLboolean Map2Color4;
 363    GLboolean Map2Index;
 364    GLboolean Map2Normal;
 365    GLboolean Map2TextureCoord1;
 366    GLboolean Map2TextureCoord2;
 367    GLboolean Map2TextureCoord3;
 368    GLboolean Map2TextureCoord4;
 369    GLboolean Map2Vertex3;
 370    GLboolean Map2Vertex4;
 371    GLboolean MinMax;
 372    GLboolean Normalize;
 373    GLboolean PixelTexture;
 374    GLboolean PointSmooth;
 375    GLboolean PolygonOffsetPoint;
 376    GLboolean PolygonOffsetLine;
 377    GLboolean PolygonOffsetFill;
 378    GLboolean PolygonSmooth;
 379    GLboolean PolygonStipple;
 380    GLboolean RescaleNormals;
 381    GLboolean Scissor;
 382    GLboolean Stencil;
 383    GLuint Texture[MAX_TEXTURE_UNITS];
 384    GLuint TexGen[MAX_TEXTURE_UNITS];
 385 };
 386
 387
 388 struct gl_eval_attrib {
 389    /* Enable bits */
 390    GLboolean Map1Color4;
 391    GLboolean Map1Index;
 392    GLboolean Map1Normal;
 393    GLboolean Map1TextureCoord1;
 394    GLboolean Map1TextureCoord2;
 395    GLboolean Map1TextureCoord3;
 396    GLboolean Map1TextureCoord4;
 397    GLboolean Map1Vertex3;
 398    GLboolean Map1Vertex4;
 399    GLboolean Map2Color4;
 400    GLboolean Map2Index;
 401    GLboolean Map2Normal;
 402    GLboolean Map2TextureCoord1;
 403    GLboolean Map2TextureCoord2;
 404    GLboolean Map2TextureCoord3;
 405    GLboolean Map2TextureCoord4;
 406    GLboolean Map2Vertex3;
 407    GLboolean Map2Vertex4;
 408    GLboolean AutoNormal;
 409    /* Map Grid endpoints and divisions and calculated du values */
 410    GLint MapGrid1un;
 411    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 412    GLint MapGrid2un, MapGrid2vn;
 413    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 414    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 415 };
 416
 417
 418 struct gl_fog_attrib {
 419    GLboolean Enabled;           /* Fog enabled flag */
 420    GLfloat Color[4];            /* Fog color */
 421    GLfloat Density;             /* Density >= 0.0 */
 422    GLfloat Start;               /* Start distance in eye coords */
 423    GLfloat End;                 /* End distance in eye coords */
 424    GLfloat Index;               /* Fog index */
 425    GLenum Mode;                 /* Fog mode */
 426    GLboolean ColorSumEnabled;
 427    GLenum FogCoordinateSource;
 428 };
 429
 430
 431 struct gl_hint_attrib {
 432    /* always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE */
 433    GLenum PerspectiveCorrection;
 434    GLenum PointSmooth;
 435    GLenum LineSmooth;
 436    GLenum PolygonSmooth;
 437    GLenum Fog;
 438
 439    /* GL_PGI_misc_hints */
 440    GLenum AllowDrawWin;
 441    GLenum AllowDrawFrg;
 442    GLenum AllowDrawMem;
 443    GLenum StrictLighting;
 444
 445    /* GL_EXT_clip_volume_hint */
 446    GLenum ClipVolumeClipping;
 447
 448    /* GL_ARB_texture_compression */
 449    GLenum TextureCompression;
 450 };
 451
 452
 453 struct gl_histogram_attrib {
 454    GLuint Width;
 455    GLint Format;
 456    GLboolean Sink;
 457    GLuint RedSize;
 458    GLuint GreenSize;
 459    GLuint BlueSize;
 460    GLuint AlphaSize;
 461    GLuint LuminanceSize;
 462    GLuint Count[HISTOGRAM_TABLE_SIZE][4];
 463 };
 464
 465
 466 struct gl_minmax_attrib {
 467    GLenum Format;
 468    GLboolean Sink;
 469    GLfloat Min[4], Max[4];   /* RGBA */
 470 };
 471
 472
 473 struct gl_convolution_attrib {
 474    GLenum Format;
 475    GLenum InternalFormat;
 476    GLuint Width;
 477    GLuint Height;
 478    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 479 };
 480
 481
 482 struct gl_light_attrib {
 483    struct gl_light Light[MAX_LIGHTS];   /* Array of lights */
 484    struct gl_lightmodel Model;          /* Lighting model */
 485
 486    /* Must flush FLUSH_VERTICES before referencing:
 487     */
 488    struct gl_material Material[2];      /* Material 0=front, 1=back */
 489
 490    GLboolean Enabled;                   /* Lighting enabled flag */
 491    GLenum ShadeModel;                   /* GL_FLAT or GL_SMOOTH */
 492    GLenum ColorMaterialFace;            /* GL_FRONT, BACK or FRONT_AND_BACK */
 493    GLenum ColorMaterialMode;            /* GL_AMBIENT, GL_DIFFUSE, etc */
 494    GLuint ColorMaterialBitmask;         /* bitmask formed from Face and Mode */
 495    GLboolean ColorMaterialEnabled;
 496
 497    struct gl_light EnabledList;         /* List sentinel */
 498
 499    /* Derived for optimizations: */
 500    GLboolean _NeedVertices;             /* Use fast shader? */
 501    GLuint  _Flags;                      /* LIGHT_* flags, see below */
 502    GLfloat _BaseColor[2][3];
 503    GLchan _BaseAlpha[2];
 504 };
 505
 506
 507 #define LIGHT_POSITIONAL   0x4
 508 #define LIGHT_SPOT         0x10
 509 #define LIGHT_LOCAL_VIEWER 0x20
 510
 511 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 512
 513 struct gl_line_attrib {
 514    GLboolean SmoothFlag;        /* GL_LINE_SMOOTH enabled? */
 515    GLboolean StippleFlag;       /* GL_LINE_STIPPLE enabled? */
 516    GLushort StipplePattern;     /* Stipple pattern */
 517    GLint StippleFactor;         /* Stipple repeat factor */
 518    GLfloat Width;               /* Line width */
 519    GLfloat _Width;              /* Clamped Line width */
 520 };
 521
 522
 523 struct gl_list_attrib {
 524    GLuint ListBase;
 525 };
 526
 527 struct gl_list_opcode {
 528    GLuint size;
 529    void (*execute)( GLcontext *ctx, void *data );
 530    void (*destroy)( GLcontext *ctx, void *data );
 531    void (*print)( GLcontext *ctx, void *data );
 532 };
 533
 534 #define GL_MAX_EXT_OPCODES 16
 535
 536 struct gl_list_extensions {
 537    struct gl_list_opcode opcode[GL_MAX_EXT_OPCODES];
 538    GLuint nr_opcodes;
 539 };
 540
 541 struct gl_pixel_attrib {
 542    GLenum ReadBuffer;           /* src buffer for glRead/CopyPixels */
 543    GLenum DriverReadBuffer;     /* Driver's current source buffer */
 544    GLfloat RedBias, RedScale;
 545    GLfloat GreenBias, GreenScale;
 546    GLfloat BlueBias, BlueScale;
 547    GLfloat AlphaBias, AlphaScale;
 548    GLfloat DepthBias, DepthScale;
 549    GLint IndexShift, IndexOffset;
 550    GLboolean MapColorFlag;
 551    GLboolean MapStencilFlag;
 552    GLfloat ZoomX, ZoomY;
 553    GLint MapStoSsize;           /* Size of each pixel map */
 554    GLint MapItoIsize;
 555    GLint MapItoRsize;
 556    GLint MapItoGsize;
 557    GLint MapItoBsize;
 558    GLint MapItoAsize;
 559    GLint MapRtoRsize;
 560    GLint MapGtoGsize;
 561    GLint MapBtoBsize;
 562    GLint MapAtoAsize;
 563    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /* Pixel map tables */
 564    GLint MapItoI[MAX_PIXEL_MAP_TABLE];
 565    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 566    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 567    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 568    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 569    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /* converted to 8-bit color */
 570    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 571    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 572    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 573    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 574    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 575    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 576    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 577    /* GL_EXT_histogram */
 578    GLboolean HistogramEnabled;
 579    GLboolean MinMaxEnabled;
 580    /* GL_SGIS_pixel_texture */
 581    GLboolean PixelTextureEnabled;
 582    GLenum FragmentRgbSource;
 583    GLenum FragmentAlphaSource;
 584    /* GL_SGI_color_matrix */
 585    GLfloat PostColorMatrixScale[4];  /* RGBA */
 586    GLfloat PostColorMatrixBias[4];   /* RGBA */
 587    /* GL_SGI_color_table */
 588    GLfloat ColorTableScale[4];
 589    GLfloat ColorTableBias[4];
 590    GLboolean ColorTableEnabled;
 591    GLfloat PCCTscale[4];
 592    GLfloat PCCTbias[4];
 593    GLboolean PostConvolutionColorTableEnabled;
 594    GLfloat PCMCTscale[4];
 595    GLfloat PCMCTbias[4];
 596    GLboolean PostColorMatrixColorTableEnabled;
 597    /* Convolution */
 598    GLboolean Convolution1DEnabled;
 599    GLboolean Convolution2DEnabled;
 600    GLboolean Separable2DEnabled;
 601    GLfloat ConvolutionBorderColor[3][4];
 602    GLenum ConvolutionBorderMode[3];
 603    GLfloat ConvolutionFilterScale[3][4];
 604    GLfloat ConvolutionFilterBias[3][4];
 605    GLfloat PostConvolutionScale[4];  /* RGBA */
 606    GLfloat PostConvolutionBias[4];   /* RGBA */
 607 };
 608
 609
 610 struct gl_point_attrib {
 611    GLboolean SmoothFlag;        /* True if GL_POINT_SMOOTH is enabled */
 612    GLboolean SpriteMode;        /* GL_MESA_sprite_point extension */
 613    GLfloat Size;                /* User-specified point size */
 614    GLfloat _Size;               /* Size clamped to Const.Min/MaxPointSize */
 615    GLfloat Params[3];           /* GL_EXT_point_parameters */
 616    GLfloat MinSize, MaxSize;    /* GL_EXT_point_parameters */
 617    GLfloat Threshold;           /* GL_EXT_point_parameters */
 618    GLboolean _Attenuated;       /* True if Params != [1, 0, 0] */
 619 };
 620
 621
 622 struct gl_polygon_attrib {
 623    GLenum FrontFace;            /* Either GL_CW or GL_CCW */
 624    GLenum FrontMode;            /* Either GL_POINT, GL_LINE or GL_FILL */
 625    GLenum BackMode;             /* Either GL_POINT, GL_LINE or GL_FILL */
 626    GLboolean _FrontBit;         /*  */
 627    GLboolean CullFlag;          /* Culling on/off flag */
 628    GLboolean SmoothFlag;        /* True if GL_POLYGON_SMOOTH is enabled */
 629    GLboolean StippleFlag;       /* True if GL_POLYGON_STIPPLE is enabled */
 630    GLenum CullFaceMode;         /* Culling mode GL_FRONT or GL_BACK */
 631    GLfloat OffsetFactor;        /* Polygon offset factor, from user */
 632    GLfloat OffsetUnits;         /* Polygon offset units, from user */
 633    GLfloat OffsetMRD;           /* = OffsetUnits * visual->MRD */
 634    GLboolean OffsetPoint;       /* Offset in GL_POINT mode */
 635    GLboolean OffsetLine;        /* Offset in GL_LINE mode */
 636    GLboolean OffsetFill;        /* Offset in GL_FILL mode */
 637    GLboolean _OffsetAny;
 638 };
 639
 640
 641 struct gl_scissor_attrib {
 642    GLboolean Enabled;           /* Scissor test enabled? */
 643    GLint X, Y;                  /* Lower left corner of box */
 644    GLsizei Width, Height;       /* Size of box */
 645 };
 646
 647
 648 struct gl_stencil_attrib {
 649    GLboolean Enabled;           /* Enabled flag */
 650    GLenum Function;             /* Stencil function */
 651    GLenum FailFunc;             /* Fail function */
 652    GLenum ZPassFunc;            /* Depth buffer pass function */
 653    GLenum ZFailFunc;            /* Depth buffer fail function */
 654    GLstencil Ref;               /* Reference value */
 655    GLstencil ValueMask;         /* Value mask */
 656    GLstencil Clear;             /* Clear value */
 657    GLstencil WriteMask;         /* Write mask */
 658 };
 659
 660
 661 /* TexGenEnabled flags */
 662 #define S_BIT 1
 663 #define T_BIT 2
 664 #define R_BIT 4
 665 #define Q_BIT 8
 666
 667 /* Texture Enabled flags */
 668 #define TEXTURE0_1D   0x1     /* Texture unit 0 (default) */
 669 #define TEXTURE0_2D   0x2
 670 #define TEXTURE0_3D   0x4
 671 #define TEXTURE0_CUBE 0x8
 672 #define TEXTURE0_ANY  (TEXTURE0_1D | TEXTURE0_2D | TEXTURE0_3D | TEXTURE0_CUBE)
 673 #define TEXTURE1_1D   (TEXTURE0_1D << 4)    /* Texture unit 1 */
 674 #define TEXTURE1_2D   (TEXTURE0_2D << 4)
 675 #define TEXTURE1_3D   (TEXTURE0_3D << 4)
 676 #define TEXTURE1_CUBE (TEXTURE0_CUBE << 4)
 677 #define TEXTURE1_ANY  (TEXTURE1_1D | TEXTURE1_2D | TEXTURE1_3D | TEXTURE1_CUBE)
 678 #define TEXTURE2_1D   (TEXTURE0_1D << 8)    /* Texture unit 2 */
 679 #define TEXTURE2_2D   (TEXTURE0_2D << 8)
 680 #define TEXTURE2_3D   (TEXTURE0_3D << 8)
 681 #define TEXTURE2_CUBE (TEXTURE0_CUBE << 8)
 682 #define TEXTURE2_ANY  (TEXTURE2_1D | TEXTURE2_2D | TEXTURE2_3D | TEXTURE2_CUBE)
 683 #define TEXTURE3_1D   (TEXTURE0_1D << 12)    /* Texture unit 3 */
 684 #define TEXTURE3_2D   (TEXTURE0_2D << 12)
 685 #define TEXTURE3_3D   (TEXTURE0_3D << 12)
 686 #define TEXTURE3_CUBE (TEXTURE0_CUBE << 12)
 687 #define TEXTURE3_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 688 #define TEXTURE4_1D   (TEXTURE0_1D << 16)    /* Texture unit 3 */
 689 #define TEXTURE4_2D   (TEXTURE0_2D << 16)
 690 #define TEXTURE4_3D   (TEXTURE0_3D << 16)
 691 #define TEXTURE4_CUBE (TEXTURE0_CUBE << 16)
 692 #define TEXTURE5_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 693 #define TEXTURE5_1D   (TEXTURE0_1D << 20)    /* Texture unit 3 */
 694 #define TEXTURE5_2D   (TEXTURE0_2D << 20)
 695 #define TEXTURE5_3D   (TEXTURE0_3D << 20)
 696 #define TEXTURE5_CUBE (TEXTURE0_CUBE << 20)
 697 #define TEXTURE5_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 698 #define TEXTURE6_1D   (TEXTURE0_1D << 24)    /* Texture unit 3 */
 699 #define TEXTURE6_2D   (TEXTURE0_2D << 24)
 700 #define TEXTURE6_3D   (TEXTURE0_3D << 24)
 701 #define TEXTURE6_CUBE (TEXTURE0_CUBE << 24)
 702 #define TEXTURE6_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 703 #define TEXTURE7_1D   (TEXTURE0_1D << 28)    /* Texture unit 3 */
 704 #define TEXTURE7_2D   (TEXTURE0_2D << 28)
 705 #define TEXTURE7_3D   (TEXTURE0_3D << 28)
 706 #define TEXTURE7_CUBE (TEXTURE0_CUBE << 28)
 707 #define TEXTURE7_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 708
 709 /* Bitmap versions of the GL_ constants.
 710  */
 711 #define TEXGEN_SPHERE_MAP        0x1
 712 #define TEXGEN_OBJ_LINEAR        0x2
 713 #define TEXGEN_EYE_LINEAR        0x4
 714 #define TEXGEN_REFLECTION_MAP_NV 0x8
 715 #define TEXGEN_NORMAL_MAP_NV     0x10
 716
 717 #define TEXGEN_NEED_M            (TEXGEN_SPHERE_MAP)
 718 #define TEXGEN_NEED_F            (TEXGEN_SPHERE_MAP        | \
 719                                   TEXGEN_REFLECTION_MAP_NV)
 720 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
 721                                   TEXGEN_REFLECTION_MAP_NV | \
 722                                   TEXGEN_NORMAL_MAP_NV)
 723 #define TEXGEN_NEED_VERTICES     (TEXGEN_OBJ_LINEAR |           \
 724                                   TEXGEN_EYE_LINEAR |           \
 725                                   TEXGEN_REFLECTION_MAP_NV |    \
 726                                   TEXGEN_SPHERE_MAP )
 727 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
 728                                   TEXGEN_REFLECTION_MAP_NV | \
 729                                   TEXGEN_NORMAL_MAP_NV     | \
 730                                   TEXGEN_EYE_LINEAR)
 731
 732
 733
 734 /* A selection of state flags to make driver and module's lives easier.
 735  */
 736 #define ENABLE_TEXGEN0        0x1
 737 #define ENABLE_TEXGEN1        0x2
 738 #define ENABLE_TEXGEN2        0x4
 739 #define ENABLE_TEXGEN3        0x8
 740 #define ENABLE_TEXGEN4        0x10
 741 #define ENABLE_TEXGEN5        0x20
 742 #define ENABLE_TEXGEN6        0x40
 743 #define ENABLE_TEXGEN7        0x80
 744 #define ENABLE_TEXMAT0        0x100     /* Ie. not the identity matrix */
 745 #define ENABLE_TEXMAT1        0x200
 746 #define ENABLE_TEXMAT2        0x400
 747 #define ENABLE_TEXMAT3        0x800
 748 #define ENABLE_TEXMAT4        0x1000
 749 #define ENABLE_TEXMAT5        0x2000
 750 #define ENABLE_TEXMAT6        0x4000
 751 #define ENABLE_TEXMAT7        0x8000
 752 #define ENABLE_LIGHT          0x10000
 753 #define ENABLE_FOG            0x20000
 754 #define ENABLE_USERCLIP       0x40000
 755 #define ENABLE_NORMALIZE      0x100000
 756 #define ENABLE_RESCALE        0x200000
 757 #define ENABLE_POINT_ATTEN    0x400000
 758
 759
 760 #define ENABLE_TEXGEN_ANY (ENABLE_TEXGEN0 | ENABLE_TEXGEN1 | \
 761                            ENABLE_TEXGEN2 | ENABLE_TEXGEN3 | \
 762                            ENABLE_TEXGEN4 | ENABLE_TEXGEN5 | \
 763                            ENABLE_TEXGEN6 | ENABLE_TEXGEN7)
 764
 765 #define ENABLE_TEXMAT_ANY (ENABLE_TEXMAT0 | ENABLE_TEXMAT1 | \
 766                            ENABLE_TEXMAT2 | ENABLE_TEXMAT3 | \
 767                            ENABLE_TEXMAT4 | ENABLE_TEXMAT5 | \
 768                            ENABLE_TEXMAT6 | ENABLE_TEXMAT7)
 769
 770 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
 771 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
 772
 773 /* Texture image record */
 774 struct gl_texture_image {
 775    GLenum Format;               /* GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA,
 776                                  * GL_INTENSITY, GL_RGB, GL_RGBA, or
 777                                  * GL_COLOR_INDEX only
 778                                  */
 779    GLenum IntFormat;            /* Internal format as given by the user */
 780    GLubyte RedBits;             /* Bits per texel component              */
 781    GLubyte GreenBits;           /*   These are initialized by Mesa but   */
 782    GLubyte BlueBits;            /*   may be reassigned by the device     */
 783    GLubyte AlphaBits;           /*   driver to indicate the true texture */
 784    GLubyte IntensityBits;       /*   color resolution.                   */
 785    GLubyte LuminanceBits;
 786    GLubyte IndexBits;
 787    GLuint Border;               /* 0 or 1 */
 788    GLuint Width;                /* = 2^WidthLog2 + 2*Border */
 789    GLuint Height;               /* = 2^HeightLog2 + 2*Border */
 790    GLuint Depth;                /* = 2^DepthLog2 + 2*Border */
 791    GLuint Width2;               /* = Width - 2*Border */
 792    GLuint Height2;              /* = Height - 2*Border */
 793    GLuint Depth2;               /* = Depth - 2*Border */
 794    GLuint WidthLog2;            /* = log2(Width2) */
 795    GLuint HeightLog2;           /* = log2(Height2) */
 796    GLuint DepthLog2;            /* = log2(Depth2) */
 797    GLuint MaxLog2;              /* = MAX(WidthLog2, HeightLog2) */
 798    GLchan *Data;                /* Image data as GLchan's */
 799
 800    GLboolean IsCompressed;      /* GL_ARB_texture_compression */
 801    GLuint CompressedSize;       /* GL_ARB_texture_compression */
 802
 803    /* For device driver: */
 804    void *DriverData;            /* Arbitrary device driver data */
 805 };
 806
 807
 808 /* Texture object record */
 809 struct gl_texture_object {
 810    _glthread_Mutex Mutex;       /* for thread safety */
 811    GLint RefCount;              /* reference count */
 812    GLuint Name;                 /* an unsigned integer */
 813    GLuint Dimensions;           /* 1 or 2 or 3 */
 814    GLfloat Priority;            /* in [0,1] */
 815    GLchan BorderColor[4];       /* as integers */
 816    GLenum WrapS;                /* GL_CLAMP, REPEAT or CLAMP_TO_EDGE */
 817    GLenum WrapT;                /* GL_CLAMP, REPEAT or CLAMP_TO_EDGE */
 818    GLenum WrapR;                /* GL_CLAMP, REPEAT or CLAMP_TO_EDGE */
 819    GLenum MinFilter;            /* minification filter */
 820    GLenum MagFilter;            /* magnification filter */
 821    GLfloat MinLod;              /* OpenGL 1.2 */
 822    GLfloat MaxLod;              /* OpenGL 1.2 */
 823    GLint BaseLevel;             /* user-specified, OpenGL 1.2 */
 824    GLint MaxLevel;              /* user-specified, OpenGL 1.2 */
 825    GLint _MaxLevel;             /* actual max mipmap level (q in the spec) */
 826    GLfloat _MaxLambda;          /* = _MaxLevel - BaseLevel (q - b in spec) */
 827    struct gl_texture_image *Image[MAX_TEXTURE_LEVELS];
 828
 829    /* Texture cube faces */
 830    /* Image[] is alias for *PosX[MAX_TEXTURE_LEVELS]; */
 831    struct gl_texture_image *NegX[MAX_TEXTURE_LEVELS];
 832    struct gl_texture_image *PosY[MAX_TEXTURE_LEVELS];
 833    struct gl_texture_image *NegY[MAX_TEXTURE_LEVELS];
 834    struct gl_texture_image *PosZ[MAX_TEXTURE_LEVELS];
 835    struct gl_texture_image *NegZ[MAX_TEXTURE_LEVELS];
 836
 837    /* GL_EXT_paletted_texture */
 838    struct gl_color_table Palette;
 839
 840    GLboolean Complete;                  /* Is texture object complete? */
 841    struct gl_texture_object *Next;      /* Next in linked list */
 842
 843    /* For device driver: */
 844    void *DriverData;    /* Arbitrary device driver data */
 845 };
 846
 847
 848
 849 /*
 850  * Texture units are new with the multitexture extension.
 851  */
 852 struct gl_texture_unit {
 853    GLuint Enabled;              /* bitmask of TEXTURE0_1D, _2D, _3D, _CUBE */
 854    GLuint _ReallyEnabled;       /* 0 or one of TEXTURE0_1D, _2D, _3D, _CUBE */
 855
 856    GLenum EnvMode;              /* GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
 857    GLfloat EnvColor[4];
 858    GLuint TexGenEnabled;        /* Bitwise-OR of [STRQ]_BIT values */
 859    GLenum GenModeS;             /* Tex coord generation mode, either */
 860    GLenum GenModeT;             /*      GL_OBJECT_LINEAR, or */
 861    GLenum GenModeR;             /*      GL_EYE_LINEAR, or    */
 862    GLenum GenModeQ;             /*      GL_SPHERE_MAP        */
 863    GLuint _GenBitS;
 864    GLuint _GenBitT;
 865    GLuint _GenBitR;
 866    GLuint _GenBitQ;
 867    GLuint _GenFlags;            /* bitwise or of GenBit[STRQ] */
 868    GLfloat ObjectPlaneS[4];
 869    GLfloat ObjectPlaneT[4];
 870    GLfloat ObjectPlaneR[4];
 871    GLfloat ObjectPlaneQ[4];
 872    GLfloat EyePlaneS[4];
 873    GLfloat EyePlaneT[4];
 874    GLfloat EyePlaneR[4];
 875    GLfloat EyePlaneQ[4];
 876    GLfloat LodBias;             /* for biasing mipmap levels */
 877
 878    /* GL_EXT_texture_env_combine */
 879    GLenum CombineModeRGB;       /* GL_REPLACE, GL_DECAL, GL_ADD, etc. */
 880    GLenum CombineModeA;         /* GL_REPLACE, GL_DECAL, GL_ADD, etc. */
 881    GLenum CombineSourceRGB[3];  /* GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
 882    GLenum CombineSourceA[3];    /* GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
 883    GLenum CombineOperandRGB[3]; /* SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
 884    GLenum CombineOperandA[3];   /* SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
 885    GLuint CombineScaleShiftRGB; /* 0, 1 or 2 */
 886    GLuint CombineScaleShiftA;   /* 0, 1 or 2 */
 887
 888    struct gl_texture_object *Current1D;
 889    struct gl_texture_object *Current2D;
 890    struct gl_texture_object *Current3D;
 891    struct gl_texture_object *CurrentCubeMap; /* GL_ARB_texture_cube_map */
 892
 893    struct gl_texture_object *_Current; /* Points to really enabled tex obj */
 894
 895    struct gl_texture_object Saved1D;  /* only used by glPush/PopAttrib */
 896    struct gl_texture_object Saved2D;
 897    struct gl_texture_object Saved3D;
 898    struct gl_texture_object SavedCubeMap;
 899 };
 900
 901
 902 struct gl_texture_attrib {
 903    /* multitexture */
 904    GLuint CurrentUnit;            /* Active texture unit */
 905    GLuint CurrentTransformUnit;   /* Client active texture xform unit */
 906
 907    GLuint _ReallyEnabled;     /* enables for all texture units: */
 908                              /* = (Unit[0]._ReallyEnabled << 0) | */
 909                              /*   (Unit[1]._ReallyEnabled << 4) | */
 910                              /*   (Unit[2]._ReallyEnabled << 8) | etc... */
 911    GLuint _GenFlags;  /* for texgen */
 912
 913    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
 914
 915    struct gl_texture_object *Proxy1D;
 916    struct gl_texture_object *Proxy2D;
 917    struct gl_texture_object *Proxy3D;
 918    struct gl_texture_object *ProxyCubeMap;
 919
 920    /* GL_EXT_shared_texture_palette */
 921    GLboolean SharedPalette;
 922    struct gl_color_table Palette;
 923 };
 924
 925
 926 struct gl_transform_attrib {
 927    GLenum MatrixMode;                           /* Matrix mode */
 928    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];
 929    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /* derived */
 930    GLboolean ClipEnabled[MAX_CLIP_PLANES];
 931    GLubyte   _AnyClip;                          /* How many ClipEnabled? */
 932    GLboolean Normalize;                         /* Normalize all normals? */
 933    GLboolean RescaleNormals;                    /* GL_EXT_rescale_normal */
 934 };
 935
 936
 937 struct gl_viewport_attrib {
 938    GLint X, Y;                  /* position */
 939    GLsizei Width, Height;       /* size */
 940    GLfloat Near, Far;           /* Depth buffer range */
 941    GLmatrix _WindowMap;         /* Mapping transformation as a matrix. */
 942 };
 943
 944
 945 /* For the attribute stack: */
 946 struct gl_attrib_node {
 947    GLbitfield kind;
 948    void *data;
 949    struct gl_attrib_node *next;
 950 };
 951
 952
 953
 954 /*
 955  * Client pixel packing/unpacking attributes
 956  */
 957 struct gl_pixelstore_attrib {
 958    GLint Alignment;
 959    GLint RowLength;
 960    GLint SkipPixels;
 961    GLint SkipRows;
 962    GLint ImageHeight;     /* for GL_EXT_texture3D */
 963    GLint SkipImages;      /* for GL_EXT_texture3D */
 964    GLboolean SwapBytes;
 965    GLboolean LsbFirst;
 966 };
 967
 968
 969 /*
 970  * Client vertex array attributes
 971  */
 972 struct gl_client_array {
 973    GLint Size;
 974    GLenum Type;
 975    GLsizei Stride;              /* user-specified stride */
 976    GLsizei StrideB;             /* actual stride in bytes */
 977    void *Ptr;
 978    GLboolean Enabled;
 979 };
 980
 981
 982
 983
 984 struct gl_array_attrib {
 985    struct gl_client_array Vertex;            /* client data descriptors */
 986    struct gl_client_array Normal;
 987    struct gl_client_array Color;
 988    struct gl_client_array SecondaryColor;
 989    struct gl_client_array FogCoord;
 990    struct gl_client_array Index;
 991    struct gl_client_array TexCoord[MAX_TEXTURE_UNITS];
 992    struct gl_client_array EdgeFlag;
 993
 994    GLint TexCoordInterleaveFactor;
 995    GLint ActiveTexture;         /* Client Active Texture */
 996    GLuint LockFirst;
 997    GLuint LockCount;
 998
 999    GLuint _Enabled;             /* _NEW_ARRAY_* - bit set if array enabled */
1000    GLuint NewState;             /* _NEW_ARRAY_* */
1001 };
1002
1003
1004
1005
1006 struct gl_feedback {
1007    GLenum Type;
1008    GLuint _Mask;                /* FB_* bits */
1009    GLfloat *Buffer;
1010    GLuint BufferSize;
1011    GLuint Count;
1012 };
1013
1014
1015
1016 struct gl_selection {
1017    GLuint *Buffer;
1018    GLuint BufferSize;   /* size of SelectBuffer */
1019    GLuint BufferCount;  /* number of values in SelectBuffer */
1020    GLuint Hits;         /* number of records in SelectBuffer */
1021    GLuint NameStackDepth;
1022    GLuint NameStack[MAX_NAME_STACK_DEPTH];
1023    GLboolean HitFlag;
1024    GLfloat HitMinZ, HitMaxZ;
1025 };
1026
1027
1028
1029 /*
1030  * 1-D Evaluator control points
1031  */
1032 struct gl_1d_map {
1033    GLuint Order;        /* Number of control points */
1034    GLfloat u1, u2, du;  /* u1, u2, 1.0/(u2-u1) */
1035    GLfloat *Points;     /* Points to contiguous control points */
1036 };
1037
1038
1039 /*
1040  * 2-D Evaluator control points
1041  */
1042 struct gl_2d_map {
1043    GLuint Uorder;               /* Number of control points in U dimension */
1044    GLuint Vorder;               /* Number of control points in V dimension */
1045    GLfloat u1, u2, du;
1046    GLfloat v1, v2, dv;
1047    GLfloat *Points;             /* Points to contiguous control points */
1048 };
1049
1050
1051 /*
1052  * All evalutator control points
1053  */
1054 struct gl_evaluators {
1055    /* 1-D maps */
1056    struct gl_1d_map Map1Vertex3;
1057    struct gl_1d_map Map1Vertex4;
1058    struct gl_1d_map Map1Index;
1059    struct gl_1d_map Map1Color4;
1060    struct gl_1d_map Map1Normal;
1061    struct gl_1d_map Map1Texture1;
1062    struct gl_1d_map Map1Texture2;
1063    struct gl_1d_map Map1Texture3;
1064    struct gl_1d_map Map1Texture4;
1065
1066    /* 2-D maps */
1067    struct gl_2d_map Map2Vertex3;
1068    struct gl_2d_map Map2Vertex4;
1069    struct gl_2d_map Map2Index;
1070    struct gl_2d_map Map2Color4;
1071    struct gl_2d_map Map2Normal;
1072    struct gl_2d_map Map2Texture1;
1073    struct gl_2d_map Map2Texture2;
1074    struct gl_2d_map Map2Texture3;
1075    struct gl_2d_map Map2Texture4;
1076 };
1077
1078
1079
1080 /*
1081  * State which can be shared by multiple contexts:
1082  */
1083 struct gl_shared_state {
1084    _glthread_Mutex Mutex;                  /* for thread safety */
1085    GLint RefCount;                         /* Reference count */
1086    struct _mesa_HashTable *DisplayList;    /* Display lists hash table */
1087    struct _mesa_HashTable *TexObjects;     /* Texture objects hash table */
1088    struct gl_texture_object *TexObjectList;/* Linked list of texture objects */
1089
1090    /* Default texture objects (shared by all multi-texture units) */
1091    struct gl_texture_object *Default1D;
1092    struct gl_texture_object *Default2D;
1093    struct gl_texture_object *Default3D;
1094    struct gl_texture_object *DefaultCubeMap;
1095
1096    void *DriverData;  /* Device driver shared state */
1097 };
1098
1099
1100
1101 /*
1102  * A "frame buffer" is a color buffer and its optional ancillary buffers:
1103  * depth, accum, stencil, and software-simulated alpha buffers.
1104  * In C++ terms, think of this as a base class from which device drivers
1105  * will make derived classes.
1106  */
1107 struct gl_frame_buffer {
1108    GLvisual *Visual;            /* The corresponding visual */
1109
1110    GLint Width, Height;         /* size of frame buffer in pixels */
1111
1112    GLboolean UseSoftwareDepthBuffer;
1113    GLboolean UseSoftwareAccumBuffer;
1114    GLboolean UseSoftwareStencilBuffer;
1115    GLboolean UseSoftwareAlphaBuffers;
1116
1117    /* Software depth (aka Z) buffer */
1118    GLvoid *DepthBuffer;         /* array [Width*Height] of GLushort or GLuint*/
1119
1120    /* Software stencil buffer */
1121    GLstencil *Stencil;          /* array [Width*Height] of GLstencil values */
1122
1123    /* Software accumulation buffer */
1124    GLaccum *Accum;              /* array [4*Width*Height] of GLaccum values */
1125
1126    /* Software alpha planes */
1127    GLchan *FrontLeftAlpha;      /* array [Width*Height] of GLubyte */
1128    GLchan *BackLeftAlpha;       /* array [Width*Height] of GLubyte */
1129    GLchan *FrontRightAlpha;     /* array [Width*Height] of GLubyte */
1130    GLchan *BackRightAlpha;      /* array [Width*Height] of GLubyte */
1131    GLchan *Alpha;               /* Points to current alpha buffer */
1132
1133    /* Drawing bounds: intersection of window size and scissor box */
1134    GLint _Xmin, _Ymin;  /* inclusive */
1135    GLint _Xmax, _Ymax;  /* exclusive */
1136 };
1137
1138
1139 /*
1140  * Constants which may be overriden by device driver.
1141  */
1142 struct gl_constants {
1143    GLint MaxTextureSize;
1144    GLint MaxCubeTextureSize;
1145    GLint MaxTextureLevels;
1146    GLuint MaxTextureUnits;
1147    GLuint MaxArrayLockSize;
1148    GLint SubPixelBits;
1149    GLfloat MinPointSize, MaxPointSize;          /* aliased */
1150    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
1151    GLfloat PointSizeGranularity;
1152    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
1153    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
1154    GLfloat LineWidthGranularity;
1155    GLuint NumAuxBuffers;
1156    GLuint MaxColorTableSize;
1157    GLuint MaxConvolutionWidth;
1158    GLuint MaxConvolutionHeight;
1159    GLuint NumCompressedTextureFormats;  /* GL_ARB_texture_compression */
1160    GLenum CompressedTextureFormats[MAX_COMPRESSED_TEXTURE_FORMATS];
1161    GLuint MaxClipPlanes;
1162    GLuint MaxLights;
1163 };
1164
1165
1166 /*
1167  * List of extensions.
1168  */
1169 struct extension;
1170 struct gl_extensions {
1171    char *ext_string;
1172    struct extension *ext_list;
1173    /* Flags to quickly test if certain extensions are available.
1174     * Not every extension needs to have such a flag, but it's encouraged.
1175     */
1176    GLboolean ARB_imaging;
1177    GLboolean ARB_multitexture;
1178    GLboolean ARB_texture_compression;
1179    GLboolean ARB_texture_cube_map;
1180    GLboolean ARB_texture_env_add;
1181    GLboolean EXT_blend_color;
1182    GLboolean EXT_blend_func_separate;
1183    GLboolean EXT_blend_logic_op;
1184    GLboolean EXT_blend_minmax;
1185    GLboolean EXT_blend_subtract;
1186    GLboolean EXT_clip_volume_hint;
1187    GLboolean EXT_convolution;
1188    GLboolean EXT_compiled_vertex_array;
1189    GLboolean EXT_fog_coord;
1190    GLboolean EXT_histogram;
1191    GLboolean EXT_packed_pixels;
1192    GLboolean EXT_paletted_texture;
1193    GLboolean EXT_point_parameters;
1194    GLboolean EXT_polygon_offset;
1195    GLboolean EXT_rescale_normal;
1196    GLboolean EXT_secondary_color;
1197    GLboolean EXT_shared_texture_palette;
1198    GLboolean EXT_stencil_wrap;
1199    GLboolean EXT_texture3D;
1200    GLboolean EXT_texture_compression_s3tc;
1201    GLboolean EXT_texture_env_add;
1202    GLboolean EXT_texture_env_combine;
1203    GLboolean EXT_texture_env_dot3;
1204    GLboolean EXT_texture_object;
1205    GLboolean EXT_texture_lod_bias;
1206    GLboolean EXT_vertex_array_set;
1207    GLboolean HP_occlusion_test;
1208    GLboolean INGR_blend_func_separate;
1209    GLboolean MESA_window_pos;
1210    GLboolean MESA_resize_buffers;
1211    GLboolean MESA_sprite_point;
1212    GLboolean NV_blend_square;
1213    GLboolean NV_texgen_reflection;
1214    GLboolean PGI_misc_hints;
1215    GLboolean SGI_color_matrix;
1216    GLboolean SGI_color_table;
1217    GLboolean SGIS_pixel_texture;
1218    GLboolean SGIS_texture_edge_clamp;
1219    GLboolean SGIX_pixel_texture;
1220    GLboolean _3DFX_texture_compression_FXT1;
1221 };
1222
1223
1224
1225 /*
1226  * Bits for image transfer operations (ctx->ImageTransferState).
1227  */
1228 #define IMAGE_SCALE_BIAS_BIT                      0x1
1229 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
1230 #define IMAGE_MAP_COLOR_BIT                       0x4
1231 #define IMAGE_COLOR_TABLE_BIT                     0x8
1232 #define IMAGE_CONVOLUTION_BIT                     0x10
1233 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
1234 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
1235 #define IMAGE_COLOR_MATRIX_BIT                    0x80
1236 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
1237 #define IMAGE_HISTOGRAM_BIT                       0x200
1238 #define IMAGE_MIN_MAX_BIT                         0x400
1239
1240 /* transfer ops up to convolution: */
1241 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
1242                                     IMAGE_SHIFT_OFFSET_BIT |   \
1243                                     IMAGE_MAP_COLOR_BIT |      \
1244                                     IMAGE_COLOR_TABLE_BIT)
1245
1246 /* transfer ops after convolution: */
1247 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
1248                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
1249                                      IMAGE_COLOR_MATRIX_BIT |                 \
1250                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
1251                                      IMAGE_HISTOGRAM_BIT |                    \
1252                                      IMAGE_MIN_MAX_BIT)
1253
1254
1255 /*
1256  * Bits to indicate what state has changed.  6 unused flags.
1257  */
1258 #define _NEW_MODELVIEW          0x1        /* ctx->ModelView */
1259 #define _NEW_PROJECTION         0x2        /* ctx->Projection */
1260 #define _NEW_TEXTURE_MATRIX     0x4        /* ctx->TextureMatrix */
1261 #define _NEW_COLOR_MATRIX       0x8        /* ctx->ColorMatrix */
1262 #define _NEW_ACCUM              0x10       /* ctx->Accum */
1263 #define _NEW_COLOR              0x20       /* ctx->Color */
1264 #define _NEW_DEPTH              0x40       /* ctx->Depth */
1265 #define _NEW_EVAL               0x80       /* ctx->Eval, ctx->EvalMap */
1266 #define _NEW_FOG                0x100      /* ctx->Fog */
1267 #define _NEW_HINT               0x200      /* ctx->Hint */
1268 #define _NEW_400                0x400      /*  */
1269 #define _NEW_LIGHT              0x800      /* ctx->Light */
1270 #define _NEW_1000               0x1000     /*  */
1271 #define _NEW_LINE               0x2000     /* ctx->Line */
1272 #define _NEW_4000               0x4000     /*  */
1273 #define _NEW_PIXEL              0x8000     /* ctx->Pixel */
1274 #define _NEW_POINT              0x10000    /* ctx->Point */
1275 #define _NEW_POLYGON            0x20000    /* ctx->Polygon */
1276 #define _NEW_POLYGONSTIPPLE     0x40000    /* ctx->PolygonStipple */
1277 #define _NEW_SCISSOR            0x80000    /* ctx->Scissor */
1278 #define _NEW_STENCIL            0x100000   /* ctx->Stencil */
1279 #define _NEW_TEXTURE            0x200000   /* ctx->Texture */
1280 #define _NEW_TRANSFORM          0x400000   /* ctx->Transform */
1281 #define _NEW_VIEWPORT           0x800000   /* ctx->Viewport */
1282 #define _NEW_PACKUNPACK         0x1000000  /* ctx->Pack, ctx->Unpack */
1283 #define _NEW_ARRAY              0x2000000  /* ctx->Array */
1284 #define _NEW_COLORTABLE         0x4000000  /* ctx->{*}ColorTable */
1285 #define _NEW_RENDERMODE         0x8000000  /* RenderMode, Feedback, Select */
1286 #define _NEW_BUFFERS            0x10000000 /* ctx->Visual, ctx->DrawBuffer, */
1287
1288 #define _NEW_ALL ~0
1289
1290
1291
1292 /* Bits to track array state changes (also used to summarize array enabled)
1293  */
1294 #define _NEW_ARRAY_VERTEX           0x1
1295 #define _NEW_ARRAY_COLOR            0x2
1296 #define _NEW_ARRAY_NORMAL           0x4
1297 #define _NEW_ARRAY_INDEX            0x8
1298 #define _NEW_ARRAY_EDGEFLAG         0x10
1299 #define _NEW_ARRAY_SECONDARYCOLOR   0x20
1300 #define _NEW_ARRAY_FOGCOORD         0x40
1301 #define _NEW_ARRAY_TEXCOORD_0       0x80
1302 #define _NEW_ARRAY_TEXCOORD_1       0x100
1303 #define _NEW_ARRAY_TEXCOORD_2       0x200
1304 #define _NEW_ARRAY_TEXCOORD_3       0x400
1305 #define _NEW_ARRAY_TEXCOORD_4       0x800
1306 #define _NEW_ARRAY_TEXCOORD_5       0x1000
1307 #define _NEW_ARRAY_TEXCOORD_6       0x2000
1308 #define _NEW_ARRAY_TEXCOORD_7       0x4000
1309 #define _NEW_ARRAY_ALL              0x7fff
1310
1311 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0<<(i))
1312
1313 /* A bunch of flags that we think might be useful to drivers.
1314  */
1315 #define DD_FEEDBACK                 0x1
1316 #define DD_SELECT                   0x2
1317 #define DD_FLATSHADE                0x4
1318 #define DD_SEPERATE_SPECULAR        0x10
1319 #define DD_TRI_LIGHT_TWOSIDE        0x20
1320 #define DD_TRI_UNFILLED             0x40
1321 #define DD_TRI_SMOOTH               0x80
1322 #define DD_TRI_STIPPLE              0x100
1323 #define DD_TRI_OFFSET               0x200
1324 #define DD_LINE_SMOOTH              0x800
1325 #define DD_LINE_STIPPLE             0x1000
1326 #define DD_LINE_WIDTH               0x2000
1327 #define DD_POINT_SMOOTH             0x4000
1328 #define DD_POINT_SIZE               0x8000
1329 #define DD_POINT_ATTEN              0x10000
1330 #define DD_TRI_CULL_FRONT_BACK      0x400000 /* special case on some hw */
1331 #define DD_Z_NEVER                  0x800000 /* special case on some hw */
1332 #define DD_STENCIL                  0x1000000
1333
1334 /* Define the state changes under which each of these bits might change
1335  */
1336 #define _DD_NEW_FEEDBACK                 _NEW_RENDERMODE
1337 #define _DD_NEW_SELECT                   _NEW_RENDERMODE
1338 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
1339 #define _DD_NEW_MULTIDRAW                _NEW_COLOR
1340 #define _DD_NEW_SEPERATE_SPECULAR        (_NEW_LIGHT|_NEW_FOG)
1341 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
1342 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
1343 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
1344 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
1345 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
1346 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
1347 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
1348 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
1349 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
1350 #define _DD_NEW_POINT_SIZE               _NEW_POINT
1351 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
1352 #define _DD_NEW_LIGHTING_CULL            _NEW_LIGHT
1353 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
1354 #define _DD_NEW_Z_NEVER                  _NEW_DEPTH
1355 #define _DD_NEW_STENCIL                  _NEW_STENCIL
1356
1357
1358 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT|          \
1359                                             _NEW_TEXTURE|               \
1360                                             _NEW_POINT|         \
1361                                             _NEW_MODELVIEW)
1362
1363 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT|          \
1364                                             _NEW_TEXTURE)
1365 #define _IMAGE_NEW_TRANSFER_STATE        (_NEW_PIXEL|_NEW_COLOR_MATRIX)
1366
1367
1368 #define NEED_NORMALS_TEXGEN      0x1
1369 #define NEED_NORMALS_LIGHT       0x2
1370
1371 #define NEED_EYE_TEXGEN          0x1
1372 #define NEED_EYE_LIGHT           0x2
1373 #define NEED_EYE_LIGHT_MODELVIEW 0x4
1374 #define NEED_EYE_POINT_ATTEN     0x8
1375
1376
1377
1378 /*
1379  * Forward declaration of display list datatypes:
1380  */
1381 union node;
1382 typedef union node Node;
1383
1384
1385
1386
1387
1388 /* This has to be included here. */
1389 #include "dd.h"
1390
1391
1392 /*
1393  * The library context:
1394  */
1395 struct __GLcontextRec {
1396    /*
1397    ** Os related interfaces; these *must* be the first members of this
1398    ** structure, because they are exposed to the outside world (i.e. GLX
1399    ** extension).
1400    */
1401    __GLimports imports;
1402    __GLexports exports;
1403
1404    /* State possibly shared with other contexts in the address space */
1405    struct gl_shared_state *Shared;
1406
1407    /* API function pointer tables */
1408    struct _glapi_table *Save;   /* Display list save funcs */
1409    struct _glapi_table *Exec;   /* Execute funcs */
1410    struct _glapi_table *CurrentDispatch;  /* == Save or Exec !! */
1411
1412    GLboolean ExecPrefersFloat;  /* What preference for color conversion? */
1413    GLboolean SavePrefersFloat;
1414
1415    GLvisual Visual;
1416    GLframebuffer *DrawBuffer;   /* buffer for writing */
1417    GLframebuffer *ReadBuffer;   /* buffer for reading */
1418
1419    /* Driver function pointer table */
1420    struct dd_function_table Driver;
1421
1422    void *DriverCtx;     /* Points to device driver context/state */
1423    void *DriverMgrCtx;  /* Points to device driver manager (optional)*/
1424
1425    /* Core/Driver constants */
1426    struct gl_constants Const;
1427
1428    /* Modelview matrix and stack */
1429    GLmatrix ModelView;           /* current matrix, not stored on stack */
1430    GLuint ModelViewStackDepth;
1431    GLmatrix ModelViewStack[MAX_MODELVIEW_STACK_DEPTH - 1];
1432
1433    /* Projection matrix and stack */
1434    GLmatrix ProjectionMatrix;    /* current matrix, not stored on stack */
1435    GLuint ProjectionStackDepth;
1436    GLmatrix ProjectionStack[MAX_PROJECTION_STACK_DEPTH - 1];
1437
1438    /* Combined modelview and projection matrix */
1439    GLmatrix _ModelProjectMatrix;
1440
1441    /* Texture matrix and stack */
1442    GLmatrix TextureMatrix[MAX_TEXTURE_UNITS];
1443    GLuint TextureStackDepth[MAX_TEXTURE_UNITS];
1444    GLmatrix TextureStack[MAX_TEXTURE_UNITS][MAX_TEXTURE_STACK_DEPTH - 1];
1445
1446    /* Color matrix and stack */
1447    GLmatrix ColorMatrix;
1448    GLuint ColorStackDepth;
1449    GLmatrix ColorStack[MAX_COLOR_STACK_DEPTH - 1];
1450
1451    /* Display lists */
1452    GLuint CallDepth;            /* Current recursion calling depth */
1453    GLboolean ExecuteFlag;       /* Execute GL commands? */
1454    GLboolean CompileFlag;       /* Compile GL commands into display list? */
1455    Node *CurrentListPtr;        /* Head of list being compiled */
1456    GLuint CurrentListNum;       /* Number of the list being compiled */
1457    Node *CurrentBlock;          /* Pointer to current block of nodes */
1458    GLuint CurrentPos;           /* Index into current block of nodes */
1459
1460    /* Extensions */
1461    struct gl_extensions Extensions;
1462
1463    /* Renderer attribute stack */
1464    GLuint AttribStackDepth;
1465    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
1466
1467    /* Renderer attribute groups */
1468    struct gl_accum_attrib       Accum;
1469    struct gl_colorbuffer_attrib Color;
1470    struct gl_current_attrib     Current;
1471    struct gl_depthbuffer_attrib Depth;
1472    struct gl_eval_attrib        Eval;
1473    struct gl_fog_attrib         Fog;
1474    struct gl_hint_attrib        Hint;
1475    struct gl_light_attrib       Light;
1476    struct gl_line_attrib        Line;
1477    struct gl_list_attrib        List;
1478    struct gl_pixel_attrib       Pixel;
1479    struct gl_point_attrib       Point;
1480    struct gl_polygon_attrib     Polygon;
1481    GLuint PolygonStipple[32];
1482    struct gl_scissor_attrib     Scissor;
1483    struct gl_stencil_attrib     Stencil;
1484    struct gl_texture_attrib     Texture;
1485    struct gl_transform_attrib   Transform;
1486    struct gl_viewport_attrib    Viewport;
1487
1488    /* Other attribute groups */
1489    struct gl_histogram_attrib   Histogram;
1490    struct gl_minmax_attrib      MinMax;
1491    struct gl_convolution_attrib Convolution1D;
1492    struct gl_convolution_attrib Convolution2D;
1493    struct gl_convolution_attrib Separable2D;
1494
1495    /* Client attribute stack */
1496    GLuint ClientAttribStackDepth;
1497    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
1498
1499    /* Client attribute groups */
1500    struct gl_array_attrib       Array;  /* Vertex arrays */
1501    struct gl_pixelstore_attrib  Pack;   /* Pixel packing */
1502    struct gl_pixelstore_attrib  Unpack; /* Pixel unpacking */
1503
1504    struct gl_evaluators EvalMap;   /* All evaluators */
1505    struct gl_feedback   Feedback;  /* Feedback */
1506    struct gl_selection  Select;    /* Selection */
1507
1508    struct gl_color_table ColorTable;       /* Pre-convolution */
1509    struct gl_color_table ProxyColorTable;  /* Pre-convolution */
1510    struct gl_color_table PostConvolutionColorTable;
1511    struct gl_color_table ProxyPostConvolutionColorTable;
1512    struct gl_color_table PostColorMatrixColorTable;
1513    struct gl_color_table ProxyPostColorMatrixColorTable;
1514
1515    GLenum ErrorValue;        /* Last error code */
1516    GLenum RenderMode;        /* either GL_RENDER, GL_SELECT, GL_FEEDBACK */
1517    GLuint NewState;          /* bitwise-or of _NEW_* flags */
1518
1519    /* Derived */
1520    GLuint _Enabled;           /* bitwise-or of ENABLE_* flags */
1521    GLuint _TriangleCaps;      /* bitwise-or of DD_* flags */
1522    GLuint _ImageTransferState;/* bitwise-or of IMAGE_*_BIT flags */
1523    GLfloat _EyeZDir[3];
1524    GLfloat _ModelViewInvScale;
1525    GLuint _NeedEyeCoords;
1526    GLuint _NeedNormals;    /* Are vertex normal vectors needed? */
1527
1528    struct gl_shine_tab *_ShineTable[2];  /* Active shine tables */
1529    struct gl_shine_tab *_ShineTabList;   /* Mru list of inactive shine tables */
1530
1531    struct gl_list_extensions listext; /* driver dlist extensions */
1532
1533
1534    GLboolean OcclusionResult;  /* GL_HP_occlusion_test */
1535    GLboolean OcclusionResultSaved;  /* GL_HP_occlusion_test */
1536
1537    /* Z buffer stuff */
1538    GLuint DepthMax;             /* Max depth buffer value */
1539    GLfloat DepthMaxF;           /* Float max depth buffer value */
1540    GLfloat MRD;                 /* minimum resolvable difference in Z values */
1541
1542    /* Should 3Dfx Glide driver catch signals? */
1543    GLboolean CatchSignals;
1544
1545    /* For debugging/development only */
1546    GLboolean NoRaster;
1547    GLboolean FirstTimeCurrent;
1548
1549    /* Dither disable via MESA_NO_DITHER env var */
1550    GLboolean NoDither;
1551
1552    GLboolean Rendering;
1553
1554 #if defined(MESA_TRACE)
1555    struct _glapi_table *TraceDispatch;
1556    trace_context_t     *TraceCtx;
1557 #else
1558    void *TraceDispatch;
1559    void *TraceCtx;
1560 #endif
1561
1562    /* Hooks for module contexts.  These will eventually live
1563     * in the driver or elsewhere.
1564     */
1565    void *swrast_context;
1566    void *swsetup_context;
1567    void *swtnl_context;
1568    void *swtnl_im;
1569    void *acache_context;
1570    void *aelt_context;
1571 };
1572
1573
1574 /* The string names for GL_POINT, GL_LINE_LOOP, etc */
1575 extern const char *_mesa_prim_name[GL_POLYGON+4];
1576 extern GLenum gl_reduce_prim[];
1577
1578
1579 #ifdef MESA_DEBUG
1580 extern int MESA_VERBOSE;
1581 extern int MESA_DEBUG_FLAGS;
1582 #else
1583 # define MESA_VERBOSE 0
1584 # define MESA_DEBUG_FLAGS 0
1585 # ifndef NDEBUG
1586 #  define NDEBUG
1587 # endif
1588 #endif
1589
1590
1591 enum _verbose {
1592    VERBOSE_VARRAY          = 0x1,
1593    VERBOSE_TEXTURE         = 0x2,
1594    VERBOSE_IMMEDIATE       = 0x4,
1595    VERBOSE_PIPELINE        = 0x8,
1596    VERBOSE_DRIVER          = 0x10,
1597    VERBOSE_STATE           = 0x20,
1598    VERBOSE_API             = 0x40,
1599    VERBOSE_DISPLAY_LIST    = 0x200,
1600    VERBOSE_LIGHTING        = 0x400
1601 };
1602
1603
1604 enum _debug {
1605    DEBUG_ALWAYS_FLUSH          = 0x1
1606 };
1607
1608
1609
1610 #define Elements(x) sizeof(x)/sizeof(*(x))
1611
1612
1613
1614 /* Eventually let the driver specify what statechanges require a flush:
1615  */
1616 #define FLUSH_VERTICES(ctx, newstate)                   \
1617 do {                                                    \
1618    if (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES)   \
1619       ctx->Driver.FlushVertices(ctx, FLUSH_STORED_VERTICES);    \
1620    ctx->NewState |= newstate;                           \
1621 } while (0)
1622
1623 #define FLUSH_CURRENT(ctx, newstate)                    \
1624 do {                                                    \
1625    if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT)    \
1626       ctx->Driver.FlushVertices(ctx, FLUSH_UPDATE_CURRENT);     \
1627    ctx->NewState |= newstate;                           \
1628 } while (0)
1629
1630 #define ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval)       \
1631 do {                                                            \
1632    if (ctx->Driver.CurrentExecPrimitive != GL_POLYGON+1) {      \
1633       gl_error( ctx, GL_INVALID_OPERATION, "begin/end" );       \
1634       return retval;                                            \
1635    }                                                            \
1636 } while (0)
1637
1638 #define ASSERT_OUTSIDE_BEGIN_END(ctx) \
1639    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx,)
1640
1641 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx) \
1642 do {                                            \
1643    ASSERT_OUTSIDE_BEGIN_END(ctx);               \
1644    FLUSH_VERTICES(ctx, 0);                      \
1645 } while (0)
1646
1647 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx, retval)     \
1648 do {                                                                    \
1649    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval);                   \
1650    FLUSH_VERTICES(ctx, 0);                                              \
1651 } while (0)
1652
1653
1654 #ifdef DEBUG
1655
1656 #define RENDER_START(CTX)                       \
1657    do {                                         \
1658       assert(!(CTX)->Rendering);                \
1659       (CTX)->Rendering = GL_TRUE;               \
1660       if ((CTX)->Driver.RenderStart) {          \
1661          (*(CTX)->Driver.RenderStart)(CTX);     \
1662       }                                         \
1663    } while (0)
1664
1665 #define RENDER_FINISH(CTX)                      \
1666    do {                                         \
1667       assert((CTX)->Rendering);                 \
1668       (CTX)->Rendering = GL_FALSE;              \
1669       if ((CTX)->Driver.RenderFinish) {         \
1670          (*(CTX)->Driver.RenderFinish)(CTX);    \
1671       }                                         \
1672    } while (0)
1673
1674 #else
1675
1676 #define RENDER_START(CTX)                       \
1677    do {                                         \
1678       if ((CTX)->Driver.RenderStart) {          \
1679          (*(CTX)->Driver.RenderStart)(CTX);     \
1680       }                                         \
1681    } while (0)
1682
1683 #define RENDER_FINISH(CTX)                      \
1684    do {                                         \
1685       if ((CTX)->Driver.RenderFinish) {         \
1686          (*(CTX)->Driver.RenderFinish)(CTX);    \
1687       }                                         \
1688    } while (0)
1689
1690 #endif
1691
1692
1693 #endif /* TYPES_H */