src/mesa/main/mtypes.h

   1 /* $Id: mtypes.h,v 1.47 2001/06/26 01:32:48 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 /* Please try to mark derived values with a leading underscore ('_').
  45  */
  46
  47 /*
  48  * Color channel data type:
  49  */
  50 #if CHAN_BITS == 8
  51    typedef GLubyte GLchan;
  52 #define CHAN_MAX 255
  53 #define CHAN_MAXF 255.0F
  54 #define CHAN_TYPE GL_UNSIGNED_BYTE
  55 #elif CHAN_BITS == 16
  56    typedef GLushort GLchan;
  57 #define CHAN_MAX 65535
  58 #define CHAN_MAXF 65535.0F
  59 #define CHAN_TYPE GL_UNSIGNED_SHORT
  60 #elif CHAN_BITS == 32
  61    typedef GLfloat GLchan;
  62 #define CHAN_MAX 1.0
  63 #define CHAN_MAXF 1.0F
  64 #define CHAN_TYPE GL_FLOAT
  65 #else
  66 #error  illegal number of color channel bits
  67 #endif
  68
  69
  70 /*
  71  * Accumulation buffer data type:
  72  */
  73 #if ACCUM_BITS==8
  74    typedef GLbyte GLaccum;
  75 #elif ACCUM_BITS==16
  76    typedef GLshort GLaccum;
  77 #else
  78 #  error "illegal number of accumulation bits"
  79 #endif
  80
  81
  82 /*
  83  * Stencil buffer data type:
  84  */
  85 #if STENCIL_BITS==8
  86    typedef GLubyte GLstencil;
  87 #  define STENCIL_MAX 0xff
  88 #elif STENCIL_BITS==16
  89    typedef GLushort GLstencil;
  90 #  define STENCIL_MAX 0xffff
  91 #else
  92 #  error "illegal number of stencil bits"
  93 #endif
  94
  95
  96 /*
  97  * Depth buffer data type:
  98  */
  99 typedef GLuint GLdepth;  /* Must be 32-bits! */
 100
 101
 102 /*
 103  * Fixed point data type:
 104  */
 105 typedef int GLfixed;
 106
 107
 108
 109 /*
 110  * Some forward type declarations
 111  */
 112 struct _mesa_HashTable;
 113 struct gl_texture_image;
 114 struct gl_texture_object;
 115 typedef struct __GLcontextRec GLcontext;
 116 typedef struct __GLcontextModesRec GLvisual;
 117 typedef struct gl_frame_buffer GLframebuffer;
 118
 119
 120
 121 /* Maximum number of temporary vertices required for clipping.  (Used
 122  * in array_cache and tnl modules).
 123  */
 124 #define MAX_CLIPPED_VERTICES ((2 * (6 + MAX_CLIP_PLANES))+1)
 125
 126
 127 /* Data structure for color tables */
 128 struct gl_color_table {
 129    GLenum Format;         /* GL_ALPHA, GL_RGB, GL_RGB, etc */
 130    GLenum IntFormat;
 131    GLuint Size;           /* number of entries (rows) in table */
 132    GLvoid *Table;         /* either GLfloat * or GLchan * */
 133    GLboolean FloatTable;  /* are entries stored as floats? */
 134    GLubyte RedSize;
 135    GLubyte GreenSize;
 136    GLubyte BlueSize;
 137    GLubyte AlphaSize;
 138    GLubyte LuminanceSize;
 139    GLubyte IntensitySize;
 140 };
 141
 142
 143 /*
 144  * Bit flags used for updating material values.
 145  */
 146 #define FRONT_AMBIENT_BIT     0x1
 147 #define BACK_AMBIENT_BIT      0x2
 148 #define FRONT_DIFFUSE_BIT     0x4
 149 #define BACK_DIFFUSE_BIT      0x8
 150 #define FRONT_SPECULAR_BIT   0x10
 151 #define BACK_SPECULAR_BIT    0x20
 152 #define FRONT_EMISSION_BIT   0x40
 153 #define BACK_EMISSION_BIT    0x80
 154 #define FRONT_SHININESS_BIT 0x100
 155 #define BACK_SHININESS_BIT  0x200
 156 #define FRONT_INDEXES_BIT   0x400
 157 #define BACK_INDEXES_BIT    0x800
 158
 159 #define FRONT_MATERIAL_BITS     (FRONT_EMISSION_BIT | FRONT_AMBIENT_BIT | \
 160                                  FRONT_DIFFUSE_BIT | FRONT_SPECULAR_BIT | \
 161                                  FRONT_SHININESS_BIT | FRONT_INDEXES_BIT)
 162
 163 #define BACK_MATERIAL_BITS      (BACK_EMISSION_BIT | BACK_AMBIENT_BIT | \
 164                                  BACK_DIFFUSE_BIT | BACK_SPECULAR_BIT | \
 165                                  BACK_SHININESS_BIT | BACK_INDEXES_BIT)
 166
 167 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 168
 169
 170
 171 /*
 172  * Specular exponent and material shininess lookup table sizes:
 173  */
 174 #define EXP_TABLE_SIZE 512
 175 #define SHINE_TABLE_SIZE 256
 176
 177 struct gl_shine_tab {
 178    struct gl_shine_tab *next, *prev;
 179    GLfloat tab[SHINE_TABLE_SIZE+1];
 180    GLfloat shininess;
 181    GLuint refcount;
 182 };
 183
 184
 185 struct gl_light {
 186    struct gl_light *next;               /* double linked list with sentinel */
 187    struct gl_light *prev;
 188
 189    GLfloat Ambient[4];          /* ambient color */
 190    GLfloat Diffuse[4];          /* diffuse color */
 191    GLfloat Specular[4];         /* specular color */
 192    GLfloat EyePosition[4];      /* position in eye coordinates */
 193    GLfloat EyeDirection[4];     /* spotlight dir in eye coordinates */
 194    GLfloat SpotExponent;
 195    GLfloat SpotCutoff;          /* in degress */
 196    GLfloat _CosCutoff;          /* = MAX(0, cos(SpotCutoff)) */
 197    GLfloat ConstantAttenuation;
 198    GLfloat LinearAttenuation;
 199    GLfloat QuadraticAttenuation;
 200    GLboolean Enabled;           /* On/off flag */
 201
 202    /* Derived fields */
 203    GLuint _Flags;               /* State */
 204
 205    GLfloat _Position[4];        /* position in eye/obj coordinates */
 206    GLfloat _VP_inf_norm[3];     /* Norm direction to infinite light */
 207    GLfloat _h_inf_norm[3];      /* Norm( _VP_inf_norm + <0,0,1> ) */
 208    GLfloat _NormDirection[4];   /* normalized spotlight direction */
 209    GLfloat _VP_inf_spot_attenuation;
 210
 211    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /* to replace a pow() call */
 212    GLfloat _MatAmbient[2][3];   /* material ambient * light ambient */
 213    GLfloat _MatDiffuse[2][3];   /* material diffuse * light diffuse */
 214    GLfloat _MatSpecular[2][3];  /* material spec * light specular */
 215    GLfloat _dli;                /* CI diffuse light intensity */
 216    GLfloat _sli;                /* CI specular light intensity */
 217 };
 218
 219
 220 struct gl_lightmodel {
 221    GLfloat Ambient[4];          /* ambient color */
 222    GLboolean LocalViewer;       /* Local (or infinite) view point? */
 223    GLboolean TwoSide;           /* Two (or one) sided lighting? */
 224    GLenum ColorControl;         /* either GL_SINGLE_COLOR */
 225                                 /* or GL_SEPARATE_SPECULAR_COLOR */
 226 };
 227
 228
 229 struct gl_material
 230 {
 231    GLfloat Ambient[4];
 232    GLfloat Diffuse[4];
 233    GLfloat Specular[4];
 234    GLfloat Emission[4];
 235    GLfloat Shininess;
 236    GLfloat AmbientIndex;        /* for color index lighting */
 237    GLfloat DiffuseIndex;        /* for color index lighting */
 238    GLfloat SpecularIndex;       /* for color index lighting */
 239 };
 240
 241
 242 /*
 243  * Attribute structures:
 244  *    We define a struct for each attribute group to make pushing and
 245  *    popping attributes easy.  Also it's a good organization.
 246  */
 247 struct gl_accum_attrib {
 248    GLfloat ClearColor[4];       /* Accumulation buffer clear color */
 249 };
 250
 251
 252 /*
 253  * Used in DrawDestMask below
 254  */
 255 #define FRONT_LEFT_BIT  1
 256 #define FRONT_RIGHT_BIT 2
 257 #define BACK_LEFT_BIT   4
 258 #define BACK_RIGHT_BIT  8
 259
 260
 261 struct gl_colorbuffer_attrib {
 262    GLuint ClearIndex;                   /* Index to use for glClear */
 263    GLchan ClearColor[4];                /* Color to use for glClear */
 264
 265    GLuint IndexMask;                    /* Color index write mask */
 266    GLubyte ColorMask[4];                /* Each flag is 0xff or 0x0 */
 267
 268    GLenum DrawBuffer;                   /* Which buffer to draw into */
 269    GLenum DriverDrawBuffer;             /* Current device driver dest buffer */
 270    GLboolean MultiDrawBuffer;           /* Drawing to mutliple buffers? */
 271    GLubyte DrawDestMask;                /* bitwise-OR of bitflags above */
 272
 273    /* alpha testing */
 274    GLboolean AlphaEnabled;              /* Alpha test enabled flag */
 275    GLenum AlphaFunc;                    /* Alpha test function */
 276    GLchan AlphaRef;                     /* Alpha ref value as GLchan */
 277
 278    /* blending */
 279    GLboolean BlendEnabled;              /* Blending enabled flag */
 280    GLenum BlendSrcRGB;                  /* Blending source operator */
 281    GLenum BlendDstRGB;                  /* Blending destination operator */
 282    GLenum BlendSrcA;                    /* GL_INGR_blend_func_separate */
 283    GLenum BlendDstA;                    /* GL_INGR_blend_func_separate */
 284    GLenum BlendEquation;
 285    GLfloat BlendColor[4];
 286
 287    /* logic op */
 288    GLenum LogicOp;                      /* Logic operator */
 289    GLboolean IndexLogicOpEnabled;       /* Color index logic op enabled flag */
 290    GLboolean ColorLogicOpEnabled;       /* RGBA logic op enabled flag */
 291
 292    GLboolean DitherFlag;                /* Dither enable flag */
 293 };
 294
 295
 296 struct gl_current_attrib {
 297    /* These values valid only when FLUSH_VERTICES has been called.
 298     */
 299    GLfloat Normal[3];                           /* Current vertex normal */
 300    GLfloat Color[4];                            /* Current RGBA color */
 301    GLfloat SecondaryColor[4];                   /* Current secondary color */
 302    GLfloat FogCoord;                            /* Current Fog coord */
 303    GLuint Index;                                /* Current color index */
 304    GLboolean EdgeFlag;                          /* Current edge flag */
 305    GLfloat Texcoord[MAX_TEXTURE_UNITS][4];      /* Current texture coords */
 306
 307    /* These values are always valid.
 308     */
 309    GLfloat RasterPos[4];                        /* Current raster position */
 310    GLfloat RasterDistance;                      /* Current raster distance */
 311    GLfloat RasterColor[4];                      /* Current raster color */
 312    GLuint  RasterIndex;                         /* Current raster index */
 313    GLfloat *RasterTexCoord;                     /* Current raster texcoord*/
 314    GLfloat RasterMultiTexCoord[MAX_TEXTURE_UNITS][4];
 315    GLfloat RasterFogCoord;
 316    GLboolean RasterPosValid;                    /* Raster po valid flag */
 317 };
 318
 319
 320 struct gl_depthbuffer_attrib {
 321    GLenum Func;                 /* Function for depth buffer compare */
 322    GLfloat Clear;               /* Value to clear depth buffer to */
 323    GLboolean Test;              /* Depth buffering enabled flag */
 324    GLboolean Mask;              /* Depth buffer writable? */
 325    GLboolean OcclusionTest;     /* GL_HP_occlusion_test */
 326 };
 327
 328
 329 struct gl_enable_attrib {
 330    GLboolean AlphaTest;
 331    GLboolean AutoNormal;
 332    GLboolean Blend;
 333    GLboolean ClipPlane[MAX_CLIP_PLANES];
 334    GLboolean ColorMaterial;
 335    GLboolean Convolution1D;
 336    GLboolean Convolution2D;
 337    GLboolean Separable2D;
 338    GLboolean CullFace;
 339    GLboolean DepthTest;
 340    GLboolean Dither;
 341    GLboolean Fog;
 342    GLboolean Histogram;
 343    GLboolean Light[MAX_LIGHTS];
 344    GLboolean Lighting;
 345    GLboolean LineSmooth;
 346    GLboolean LineStipple;
 347    GLboolean IndexLogicOp;
 348    GLboolean ColorLogicOp;
 349    GLboolean Map1Color4;
 350    GLboolean Map1Index;
 351    GLboolean Map1Normal;
 352    GLboolean Map1TextureCoord1;
 353    GLboolean Map1TextureCoord2;
 354    GLboolean Map1TextureCoord3;
 355    GLboolean Map1TextureCoord4;
 356    GLboolean Map1Vertex3;
 357    GLboolean Map1Vertex4;
 358    GLboolean Map2Color4;
 359    GLboolean Map2Index;
 360    GLboolean Map2Normal;
 361    GLboolean Map2TextureCoord1;
 362    GLboolean Map2TextureCoord2;
 363    GLboolean Map2TextureCoord3;
 364    GLboolean Map2TextureCoord4;
 365    GLboolean Map2Vertex3;
 366    GLboolean Map2Vertex4;
 367    GLboolean MinMax;
 368    GLboolean Normalize;
 369    GLboolean PixelTexture;
 370    GLboolean PointSmooth;
 371    GLboolean PolygonOffsetPoint;
 372    GLboolean PolygonOffsetLine;
 373    GLboolean PolygonOffsetFill;
 374    GLboolean PolygonSmooth;
 375    GLboolean PolygonStipple;
 376    GLboolean RescaleNormals;
 377    GLboolean Scissor;
 378    GLboolean Stencil;
 379    GLboolean MultisampleEnabled;     /* GL_ARB_multisample */
 380    GLboolean SampleAlphaToCoverage;  /* GL_ARB_multisample */
 381    GLboolean SampleAlphaToOne;       /* GL_ARB_multisample */
 382    GLboolean SampleCoverage;         /* GL_ARB_multisample */
 383    GLboolean SampleCoverageInvert;   /* GL_ARB_multisample */
 384    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 385    GLuint Texture[MAX_TEXTURE_UNITS];
 386    GLuint TexGen[MAX_TEXTURE_UNITS];
 387 };
 388
 389
 390 struct gl_eval_attrib {
 391    /* Enable bits */
 392    GLboolean Map1Color4;
 393    GLboolean Map1Index;
 394    GLboolean Map1Normal;
 395    GLboolean Map1TextureCoord1;
 396    GLboolean Map1TextureCoord2;
 397    GLboolean Map1TextureCoord3;
 398    GLboolean Map1TextureCoord4;
 399    GLboolean Map1Vertex3;
 400    GLboolean Map1Vertex4;
 401    GLboolean Map2Color4;
 402    GLboolean Map2Index;
 403    GLboolean Map2Normal;
 404    GLboolean Map2TextureCoord1;
 405    GLboolean Map2TextureCoord2;
 406    GLboolean Map2TextureCoord3;
 407    GLboolean Map2TextureCoord4;
 408    GLboolean Map2Vertex3;
 409    GLboolean Map2Vertex4;
 410    GLboolean AutoNormal;
 411    /* Map Grid endpoints and divisions and calculated du values */
 412    GLint MapGrid1un;
 413    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 414    GLint MapGrid2un, MapGrid2vn;
 415    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 416    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 417 };
 418
 419
 420 struct gl_fog_attrib {
 421    GLboolean Enabled;           /* Fog enabled flag */
 422    GLfloat Color[4];            /* Fog color */
 423    GLfloat Density;             /* Density >= 0.0 */
 424    GLfloat Start;               /* Start distance in eye coords */
 425    GLfloat End;                 /* End distance in eye coords */
 426    GLfloat Index;               /* Fog index */
 427    GLenum Mode;                 /* Fog mode */
 428    GLboolean ColorSumEnabled;
 429    GLenum FogCoordinateSource;  /* GL_EXT_fog_coord */
 430 };
 431
 432
 433 struct gl_hint_attrib {
 434    /* always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE */
 435    GLenum PerspectiveCorrection;
 436    GLenum PointSmooth;
 437    GLenum LineSmooth;
 438    GLenum PolygonSmooth;
 439    GLenum Fog;
 440    GLenum ClipVolumeClipping;   /* GL_EXT_clip_volume_hint */
 441    GLenum TextureCompression;   /* GL_ARB_texture_compression */
 442    GLenum GenerateMipmap;       /* GL_SGIS_generate_mipmap */
 443 };
 444
 445
 446 struct gl_histogram_attrib {
 447    GLuint Width;                                /* number of table entries */
 448    GLint Format;                                /* GL_ALPHA, GL_RGB, etc */
 449    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /* the histogram */
 450    GLboolean Sink;                              /* terminate image transfer? */
 451    GLubyte RedSize;                             /* Bits per counter */
 452    GLubyte GreenSize;
 453    GLubyte BlueSize;
 454    GLubyte AlphaSize;
 455    GLubyte LuminanceSize;
 456 };
 457
 458
 459 struct gl_minmax_attrib {
 460    GLenum Format;
 461    GLboolean Sink;
 462    GLfloat Min[4], Max[4];   /* RGBA */
 463 };
 464
 465
 466 struct gl_convolution_attrib {
 467    GLenum Format;
 468    GLenum InternalFormat;
 469    GLuint Width;
 470    GLuint Height;
 471    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 472 };
 473
 474
 475 struct gl_light_attrib {
 476    struct gl_light Light[MAX_LIGHTS];   /* Array of lights */
 477    struct gl_lightmodel Model;          /* Lighting model */
 478
 479    /* Must flush FLUSH_VERTICES before referencing:
 480     */
 481    struct gl_material Material[2];      /* Material 0=front, 1=back */
 482
 483    GLboolean Enabled;                   /* Lighting enabled flag */
 484    GLenum ShadeModel;                   /* GL_FLAT or GL_SMOOTH */
 485    GLenum ColorMaterialFace;            /* GL_FRONT, BACK or FRONT_AND_BACK */
 486    GLenum ColorMaterialMode;            /* GL_AMBIENT, GL_DIFFUSE, etc */
 487    GLuint ColorMaterialBitmask;         /* bitmask formed from Face and Mode */
 488    GLboolean ColorMaterialEnabled;
 489
 490    struct gl_light EnabledList;         /* List sentinel */
 491
 492    /* Derived for optimizations: */
 493    GLboolean _NeedVertices;             /* Use fast shader? */
 494    GLuint  _Flags;                      /* LIGHT_* flags, see below */
 495    GLfloat _BaseColor[2][3];
 496    GLfloat _BaseAlpha[2];
 497 };
 498
 499
 500 #define LIGHT_SPOT         0x1
 501 #define LIGHT_LOCAL_VIEWER 0x2
 502 #define LIGHT_POSITIONAL   0x4
 503
 504 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 505
 506 struct gl_line_attrib {
 507    GLboolean SmoothFlag;        /* GL_LINE_SMOOTH enabled? */
 508    GLboolean StippleFlag;       /* GL_LINE_STIPPLE enabled? */
 509    GLushort StipplePattern;     /* Stipple pattern */
 510    GLint StippleFactor;         /* Stipple repeat factor */
 511    GLfloat Width;               /* Line width */
 512    GLfloat _Width;              /* Clamped Line width */
 513 };
 514
 515
 516 struct gl_list_attrib {
 517    GLuint ListBase;
 518 };
 519
 520 struct gl_list_opcode {
 521    GLuint size;
 522    void (*execute)( GLcontext *ctx, void *data );
 523    void (*destroy)( GLcontext *ctx, void *data );
 524    void (*print)( GLcontext *ctx, void *data );
 525 };
 526
 527 #define GL_MAX_EXT_OPCODES 16
 528
 529 struct gl_list_extensions {
 530    struct gl_list_opcode opcode[GL_MAX_EXT_OPCODES];
 531    GLuint nr_opcodes;
 532 };
 533
 534
 535 struct gl_multisample_attrib {
 536    GLboolean Enabled;
 537    GLboolean SampleAlphaToCoverage;
 538    GLboolean SampleAlphaToOne;
 539    GLboolean SampleCoverage;
 540    GLfloat SampleCoverageValue;
 541    GLboolean SampleCoverageInvert;
 542 };
 543
 544
 545 struct gl_pixel_attrib {
 546    GLenum ReadBuffer;           /* src buffer for glRead/CopyPixels */
 547    GLenum DriverReadBuffer;     /* Driver's current source buffer */
 548    GLfloat RedBias, RedScale;
 549    GLfloat GreenBias, GreenScale;
 550    GLfloat BlueBias, BlueScale;
 551    GLfloat AlphaBias, AlphaScale;
 552    GLfloat DepthBias, DepthScale;
 553    GLint IndexShift, IndexOffset;
 554    GLboolean MapColorFlag;
 555    GLboolean MapStencilFlag;
 556    GLfloat ZoomX, ZoomY;
 557    GLint MapStoSsize;           /* Size of each pixel map */
 558    GLint MapItoIsize;
 559    GLint MapItoRsize;
 560    GLint MapItoGsize;
 561    GLint MapItoBsize;
 562    GLint MapItoAsize;
 563    GLint MapRtoRsize;
 564    GLint MapGtoGsize;
 565    GLint MapBtoBsize;
 566    GLint MapAtoAsize;
 567    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /* Pixel map tables */
 568    GLint MapItoI[MAX_PIXEL_MAP_TABLE];
 569    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 570    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 571    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 572    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 573    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /* converted to 8-bit color */
 574    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 575    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 576    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 577    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 578    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 579    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 580    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 581    /* GL_EXT_histogram */
 582    GLboolean HistogramEnabled;
 583    GLboolean MinMaxEnabled;
 584    /* GL_SGIS_pixel_texture */
 585    GLboolean PixelTextureEnabled;
 586    GLenum FragmentRgbSource;
 587    GLenum FragmentAlphaSource;
 588    /* GL_SGI_color_matrix */
 589    GLfloat PostColorMatrixScale[4];  /* RGBA */
 590    GLfloat PostColorMatrixBias[4];   /* RGBA */
 591    /* GL_SGI_color_table */
 592    GLfloat ColorTableScale[4];
 593    GLfloat ColorTableBias[4];
 594    GLboolean ColorTableEnabled;
 595    GLfloat PCCTscale[4];
 596    GLfloat PCCTbias[4];
 597    GLboolean PostConvolutionColorTableEnabled;
 598    GLfloat PCMCTscale[4];
 599    GLfloat PCMCTbias[4];
 600    GLboolean PostColorMatrixColorTableEnabled;
 601    /* Convolution */
 602    GLboolean Convolution1DEnabled;
 603    GLboolean Convolution2DEnabled;
 604    GLboolean Separable2DEnabled;
 605    GLfloat ConvolutionBorderColor[3][4];
 606    GLenum ConvolutionBorderMode[3];
 607    GLfloat ConvolutionFilterScale[3][4];
 608    GLfloat ConvolutionFilterBias[3][4];
 609    GLfloat PostConvolutionScale[4];  /* RGBA */
 610    GLfloat PostConvolutionBias[4];   /* RGBA */
 611 };
 612
 613
 614 struct gl_point_attrib {
 615    GLboolean SmoothFlag;        /* True if GL_POINT_SMOOTH is enabled */
 616    GLboolean SpriteMode;        /* GL_MESA_sprite_point extension */
 617    GLfloat Size;                /* User-specified point size */
 618    GLfloat _Size;               /* Size clamped to Const.Min/MaxPointSize */
 619    GLfloat Params[3];           /* GL_EXT_point_parameters */
 620    GLfloat MinSize, MaxSize;    /* GL_EXT_point_parameters */
 621    GLfloat Threshold;           /* GL_EXT_point_parameters */
 622    GLboolean _Attenuated;       /* True if Params != [1, 0, 0] */
 623 };
 624
 625
 626 struct gl_polygon_attrib {
 627    GLenum FrontFace;            /* Either GL_CW or GL_CCW */
 628    GLenum FrontMode;            /* Either GL_POINT, GL_LINE or GL_FILL */
 629    GLenum BackMode;             /* Either GL_POINT, GL_LINE or GL_FILL */
 630    GLboolean _FrontBit;         /*  */
 631    GLboolean CullFlag;          /* Culling on/off flag */
 632    GLboolean SmoothFlag;        /* True if GL_POLYGON_SMOOTH is enabled */
 633    GLboolean StippleFlag;       /* True if GL_POLYGON_STIPPLE is enabled */
 634    GLenum CullFaceMode;         /* Culling mode GL_FRONT or GL_BACK */
 635    GLfloat OffsetFactor;        /* Polygon offset factor, from user */
 636    GLfloat OffsetUnits;         /* Polygon offset units, from user */
 637    GLfloat OffsetMRD;           /* = OffsetUnits * visual->MRD */
 638    GLboolean OffsetPoint;       /* Offset in GL_POINT mode */
 639    GLboolean OffsetLine;        /* Offset in GL_LINE mode */
 640    GLboolean OffsetFill;        /* Offset in GL_FILL mode */
 641    GLboolean _OffsetAny;
 642 };
 643
 644
 645 struct gl_scissor_attrib {
 646    GLboolean Enabled;           /* Scissor test enabled? */
 647    GLint X, Y;                  /* Lower left corner of box */
 648    GLsizei Width, Height;       /* Size of box */
 649 };
 650
 651
 652 struct gl_stencil_attrib {
 653    GLboolean Enabled;           /* Enabled flag */
 654    GLenum Function;             /* Stencil function */
 655    GLenum FailFunc;             /* Fail function */
 656    GLenum ZPassFunc;            /* Depth buffer pass function */
 657    GLenum ZFailFunc;            /* Depth buffer fail function */
 658    GLstencil Ref;               /* Reference value */
 659    GLstencil ValueMask;         /* Value mask */
 660    GLstencil Clear;             /* Clear value */
 661    GLstencil WriteMask;         /* Write mask */
 662 };
 663
 664
 665 /* TexGenEnabled flags */
 666 #define S_BIT 1
 667 #define T_BIT 2
 668 #define R_BIT 4
 669 #define Q_BIT 8
 670
 671 /* Texture Enabled flags */
 672 #define TEXTURE0_1D   0x1     /* Texture unit 0 (default) */
 673 #define TEXTURE0_2D   0x2
 674 #define TEXTURE0_3D   0x4
 675 #define TEXTURE0_CUBE 0x8
 676 #define TEXTURE0_ANY  (TEXTURE0_1D | TEXTURE0_2D | TEXTURE0_3D | TEXTURE0_CUBE)
 677 #define TEXTURE1_1D   (TEXTURE0_1D << 4)    /* Texture unit 1 */
 678 #define TEXTURE1_2D   (TEXTURE0_2D << 4)
 679 #define TEXTURE1_3D   (TEXTURE0_3D << 4)
 680 #define TEXTURE1_CUBE (TEXTURE0_CUBE << 4)
 681 #define TEXTURE1_ANY  (TEXTURE1_1D | TEXTURE1_2D | TEXTURE1_3D | TEXTURE1_CUBE)
 682 #define TEXTURE2_1D   (TEXTURE0_1D << 8)    /* Texture unit 2 */
 683 #define TEXTURE2_2D   (TEXTURE0_2D << 8)
 684 #define TEXTURE2_3D   (TEXTURE0_3D << 8)
 685 #define TEXTURE2_CUBE (TEXTURE0_CUBE << 8)
 686 #define TEXTURE2_ANY  (TEXTURE2_1D | TEXTURE2_2D | TEXTURE2_3D | TEXTURE2_CUBE)
 687 #define TEXTURE3_1D   (TEXTURE0_1D << 12)    /* Texture unit 3 */
 688 #define TEXTURE3_2D   (TEXTURE0_2D << 12)
 689 #define TEXTURE3_3D   (TEXTURE0_3D << 12)
 690 #define TEXTURE3_CUBE (TEXTURE0_CUBE << 12)
 691 #define TEXTURE3_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 692 #define TEXTURE4_1D   (TEXTURE0_1D << 16)    /* Texture unit 4 */
 693 #define TEXTURE4_2D   (TEXTURE0_2D << 16)
 694 #define TEXTURE4_3D   (TEXTURE0_3D << 16)
 695 #define TEXTURE4_CUBE (TEXTURE0_CUBE << 16)
 696 #define TEXTURE5_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 697 #define TEXTURE5_1D   (TEXTURE0_1D << 20)    /* Texture unit 5 */
 698 #define TEXTURE5_2D   (TEXTURE0_2D << 20)
 699 #define TEXTURE5_3D   (TEXTURE0_3D << 20)
 700 #define TEXTURE5_CUBE (TEXTURE0_CUBE << 20)
 701 #define TEXTURE5_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 702 #define TEXTURE6_1D   (TEXTURE0_1D << 24)    /* Texture unit 6 */
 703 #define TEXTURE6_2D   (TEXTURE0_2D << 24)
 704 #define TEXTURE6_3D   (TEXTURE0_3D << 24)
 705 #define TEXTURE6_CUBE (TEXTURE0_CUBE << 24)
 706 #define TEXTURE6_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 707 #define TEXTURE7_1D   (TEXTURE0_1D << 28)    /* Texture unit 7 */
 708 #define TEXTURE7_2D   (TEXTURE0_2D << 28)
 709 #define TEXTURE7_3D   (TEXTURE0_3D << 28)
 710 #define TEXTURE7_CUBE (TEXTURE0_CUBE << 28)
 711 #define TEXTURE7_ANY  (TEXTURE3_1D | TEXTURE3_2D | TEXTURE3_3D | TEXTURE3_CUBE)
 712
 713 /* Bitmap versions of the GL_ constants.
 714  */
 715 #define TEXGEN_SPHERE_MAP        0x1
 716 #define TEXGEN_OBJ_LINEAR        0x2
 717 #define TEXGEN_EYE_LINEAR        0x4
 718 #define TEXGEN_REFLECTION_MAP_NV 0x8
 719 #define TEXGEN_NORMAL_MAP_NV     0x10
 720
 721 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
 722                                   TEXGEN_REFLECTION_MAP_NV | \
 723                                   TEXGEN_NORMAL_MAP_NV)
 724 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
 725                                   TEXGEN_REFLECTION_MAP_NV | \
 726                                   TEXGEN_NORMAL_MAP_NV     | \
 727                                   TEXGEN_EYE_LINEAR)
 728
 729
 730
 731 /* A selection of state flags to make driver and module's lives easier.
 732  */
 733 #define ENABLE_TEXGEN0        0x1
 734 #define ENABLE_TEXGEN1        0x2
 735 #define ENABLE_TEXGEN2        0x4
 736 #define ENABLE_TEXGEN3        0x8
 737 #define ENABLE_TEXGEN4        0x10
 738 #define ENABLE_TEXGEN5        0x20
 739 #define ENABLE_TEXGEN6        0x40
 740 #define ENABLE_TEXGEN7        0x80
 741
 742 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
 743 #define ENABLE_TEXMAT1        0x2
 744 #define ENABLE_TEXMAT2        0x4
 745 #define ENABLE_TEXMAT3        0x8
 746 #define ENABLE_TEXMAT4        0x10
 747 #define ENABLE_TEXMAT5        0x20
 748 #define ENABLE_TEXMAT6        0x40
 749 #define ENABLE_TEXMAT7        0x80
 750
 751 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
 752 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
 753
 754 /*
 755  * If teximage is color-index, texelOut returns GLchan[1].
 756  * If teximage is depth, texelOut returns GLfloat[1].
 757  * Otherwise, texelOut returns GLchan[4].
 758  */
 759 typedef void (*FetchTexelFunc)( const struct gl_texture_image *texImage,
 760                                 GLint col, GLint row, GLint img,
 761                                 GLvoid *texelOut );
 762
 763 /* Texture format record */
 764 struct gl_texture_format {
 765    GLint MesaFormat;            /* One of the MESA_FORMAT_* values */
 766
 767    GLenum BaseFormat;           /* Either GL_ALPHA, GL_INTENSITY, GL_LUMINANCE,
 768                                  * GL_LUMINANCE_ALPHA, GL_RGB, GL_RGBA,
 769                                  * GL_COLOR_INDEX or GL_DEPTH_COMPONENT.
 770                                  */
 771    GLenum Type;                 /* Internal type as GL enum value */
 772
 773    GLubyte RedBits;             /* Bits per texel component */
 774    GLubyte GreenBits;
 775    GLubyte BlueBits;
 776    GLubyte AlphaBits;
 777    GLubyte LuminanceBits;
 778    GLubyte IntensityBits;
 779    GLubyte IndexBits;
 780    GLubyte DepthBits;
 781
 782    GLint TexelBytes;
 783
 784    FetchTexelFunc FetchTexel1D; /* Texel fetch function pointers */
 785    FetchTexelFunc FetchTexel2D;
 786    FetchTexelFunc FetchTexel3D;
 787 };
 788
 789 /* Texture image record */
 790 struct gl_texture_image {
 791    GLenum Format;               /* GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA,
 792                                  * GL_INTENSITY, GL_RGB, GL_RGBA,
 793                                  * GL_COLOR_INDEX or GL_DEPTH_COMPONENT only.
 794                                  */
 795    GLint IntFormat;             /* Internal format as given by the user */
 796    GLuint Border;               /* 0 or 1 */
 797    GLuint Width;                /* = 2^WidthLog2 + 2*Border */
 798    GLuint Height;               /* = 2^HeightLog2 + 2*Border */
 799    GLuint Depth;                /* = 2^DepthLog2 + 2*Border */
 800    GLuint Width2;               /* = Width - 2*Border */
 801    GLuint Height2;              /* = Height - 2*Border */
 802    GLuint Depth2;               /* = Depth - 2*Border */
 803    GLuint WidthLog2;            /* = log2(Width2) */
 804    GLuint HeightLog2;           /* = log2(Height2) */
 805    GLuint DepthLog2;            /* = log2(Depth2) */
 806    GLuint MaxLog2;              /* = MAX(WidthLog2, HeightLog2) */
 807    GLvoid *Data;                /* Image data, accessed via FetchTexel() */
 808
 809    const struct gl_texture_format *TexFormat;
 810
 811    FetchTexelFunc FetchTexel;   /* Texel fetch function pointer */
 812
 813    GLboolean IsCompressed;      /* GL_ARB_texture_compression */
 814    GLuint CompressedSize;       /* GL_ARB_texture_compression */
 815
 816    /* For device driver: */
 817    void *DriverData;            /* Arbitrary device driver data */
 818 };
 819
 820
 821 /* Texture object record */
 822 struct gl_texture_object {
 823    _glthread_Mutex Mutex;       /* for thread safety */
 824    GLint RefCount;              /* reference count */
 825    GLuint Name;                 /* an unsigned integer */
 826    GLuint Dimensions;           /* 1 or 2 or 3 or 6 (cube map) */
 827    GLfloat Priority;            /* in [0,1] */
 828    GLchan BorderColor[4];
 829    GLenum WrapS;                /* Wrap modes are: GL_CLAMP, REPEAT */
 830    GLenum WrapT;                /*   GL_CLAMP_TO_EDGE, and          */
 831    GLenum WrapR;                /*   GL_CLAMP_TO_BORDER_ARB         */
 832    GLenum MinFilter;            /* minification filter */
 833    GLenum MagFilter;            /* magnification filter */
 834    GLfloat MinLod;              /* min lambda, OpenGL 1.2 */
 835    GLfloat MaxLod;              /* max lambda, OpenGL 1.2 */
 836    GLint BaseLevel;             /* min mipmap level, OpenGL 1.2 */
 837    GLint MaxLevel;              /* max mipmap level, OpenGL 1.2 */
 838    GLfloat MaxAnisotropy;       /* GL_EXT_texture_filter_anisotropic */
 839    GLboolean CompareFlag;       /* GL_SGIX_shadow */
 840    GLenum CompareOperator;      /* GL_SGIX_shadow */
 841    GLchan ShadowAmbient;        /* GL_SGIX_shadow_ambient */
 842    GLint _MaxLevel;             /* actual max mipmap level (q in the spec) */
 843    GLfloat _MaxLambda;          /* = _MaxLevel - BaseLevel (q - b in spec) */
 844    GLboolean GenerateMipmap;    /* GL_SGIS_generate_mipmap */
 845
 846    struct gl_texture_image *Image[MAX_TEXTURE_LEVELS];
 847
 848    /* Texture cube faces */
 849    /* Image[] is alias for *PosX[MAX_TEXTURE_LEVELS]; */
 850    struct gl_texture_image *NegX[MAX_TEXTURE_LEVELS];
 851    struct gl_texture_image *PosY[MAX_TEXTURE_LEVELS];
 852    struct gl_texture_image *NegY[MAX_TEXTURE_LEVELS];
 853    struct gl_texture_image *PosZ[MAX_TEXTURE_LEVELS];
 854    struct gl_texture_image *NegZ[MAX_TEXTURE_LEVELS];
 855
 856    /* GL_EXT_paletted_texture */
 857    struct gl_color_table Palette;
 858
 859    GLboolean Complete;                  /* Is texture object complete? */
 860    struct gl_texture_object *Next;      /* Next in linked list */
 861
 862    /* For device driver: */
 863    void *DriverData;    /* Arbitrary device driver data */
 864 };
 865
 866
 867
 868 /*
 869  * Texture units are new with the multitexture extension.
 870  */
 871 struct gl_texture_unit {
 872    GLuint Enabled;              /* bitmask of TEXTURE0_1D, _2D, _3D, _CUBE */
 873    GLuint _ReallyEnabled;       /* 0 or one of TEXTURE0_1D, _2D, _3D, _CUBE */
 874
 875    GLenum EnvMode;              /* GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
 876    GLfloat EnvColor[4];
 877    GLuint TexGenEnabled;        /* Bitwise-OR of [STRQ]_BIT values */
 878    GLenum GenModeS;             /* Tex coord generation mode, either */
 879    GLenum GenModeT;             /*      GL_OBJECT_LINEAR, or */
 880    GLenum GenModeR;             /*      GL_EYE_LINEAR, or    */
 881    GLenum GenModeQ;             /*      GL_SPHERE_MAP        */
 882    GLuint _GenBitS;
 883    GLuint _GenBitT;
 884    GLuint _GenBitR;
 885    GLuint _GenBitQ;
 886    GLuint _GenFlags;            /* bitwise or of GenBit[STRQ] */
 887    GLfloat ObjectPlaneS[4];
 888    GLfloat ObjectPlaneT[4];
 889    GLfloat ObjectPlaneR[4];
 890    GLfloat ObjectPlaneQ[4];
 891    GLfloat EyePlaneS[4];
 892    GLfloat EyePlaneT[4];
 893    GLfloat EyePlaneR[4];
 894    GLfloat EyePlaneQ[4];
 895    GLfloat LodBias;             /* for biasing mipmap levels */
 896
 897    /* GL_EXT_texture_env_combine */
 898    GLenum CombineModeRGB;       /* GL_REPLACE, GL_DECAL, GL_ADD, etc. */
 899    GLenum CombineModeA;         /* GL_REPLACE, GL_DECAL, GL_ADD, etc. */
 900    GLenum CombineSourceRGB[3];  /* GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
 901    GLenum CombineSourceA[3];    /* GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
 902    GLenum CombineOperandRGB[3]; /* SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
 903    GLenum CombineOperandA[3];   /* SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
 904    GLuint CombineScaleShiftRGB; /* 0, 1 or 2 */
 905    GLuint CombineScaleShiftA;   /* 0, 1 or 2 */
 906
 907    struct gl_texture_object *Current1D;
 908    struct gl_texture_object *Current2D;
 909    struct gl_texture_object *Current3D;
 910    struct gl_texture_object *CurrentCubeMap; /* GL_ARB_texture_cube_map */
 911
 912    struct gl_texture_object *_Current; /* Points to really enabled tex obj */
 913
 914    struct gl_texture_object Saved1D;  /* only used by glPush/PopAttrib */
 915    struct gl_texture_object Saved2D;
 916    struct gl_texture_object Saved3D;
 917    struct gl_texture_object SavedCubeMap;
 918 };
 919
 920
 921 struct gl_texture_attrib {
 922    /* multitexture */
 923    GLuint CurrentUnit;            /* Active texture unit */
 924
 925    GLuint _ReallyEnabled;     /* enables for all texture units: */
 926                              /* = (Unit[0]._ReallyEnabled << 0) | */
 927                              /*   (Unit[1]._ReallyEnabled << 4) | */
 928                              /*   (Unit[2]._ReallyEnabled << 8) | etc... */
 929
 930    GLuint _GenFlags;  /* for texgen */
 931    GLuint _TexGenEnabled;
 932    GLuint _TexMatEnabled;
 933
 934    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
 935
 936    struct gl_texture_object *Proxy1D;
 937    struct gl_texture_object *Proxy2D;
 938    struct gl_texture_object *Proxy3D;
 939    struct gl_texture_object *ProxyCubeMap;
 940
 941    /* GL_EXT_shared_texture_palette */
 942    GLboolean SharedPalette;
 943    struct gl_color_table Palette;
 944 };
 945
 946
 947 struct gl_transform_attrib {
 948    GLenum MatrixMode;                           /* Matrix mode */
 949    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];
 950    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /* derived */
 951    GLboolean ClipEnabled[MAX_CLIP_PLANES];
 952    GLubyte   _AnyClip;                          /* How many ClipEnabled? */
 953    GLboolean Normalize;                         /* Normalize all normals? */
 954    GLboolean RescaleNormals;                    /* GL_EXT_rescale_normal */
 955    GLboolean RasterPositionUnclipped;           /* GL_IBM_rasterpos_clip */
 956 };
 957
 958
 959 struct gl_viewport_attrib {
 960    GLint X, Y;                  /* position */
 961    GLsizei Width, Height;       /* size */
 962    GLfloat Near, Far;           /* Depth buffer range */
 963    GLmatrix _WindowMap;         /* Mapping transformation as a matrix. */
 964 };
 965
 966
 967 /* For the attribute stack: */
 968 struct gl_attrib_node {
 969    GLbitfield kind;
 970    void *data;
 971    struct gl_attrib_node *next;
 972 };
 973
 974
 975 /*
 976  * Client pixel packing/unpacking attributes
 977  */
 978 struct gl_pixelstore_attrib {
 979    GLint Alignment;
 980    GLint RowLength;
 981    GLint SkipPixels;
 982    GLint SkipRows;
 983    GLint ImageHeight;     /* for GL_EXT_texture3D */
 984    GLint SkipImages;      /* for GL_EXT_texture3D */
 985    GLboolean SwapBytes;
 986    GLboolean LsbFirst;
 987 };
 988
 989
 990 #define CA_CLIENT_DATA     0x1  /* Data not alloced by mesa */
 991
 992
 993 /*
 994  * Client vertex array attributes
 995  */
 996 struct gl_client_array {
 997    GLint Size;
 998    GLenum Type;
 999    GLsizei Stride;              /* user-specified stride */
1000    GLsizei StrideB;             /* actual stride in bytes */
1001    void *Ptr;
1002    GLuint Flags;
1003    GLboolean Enabled;
1004 };
1005
1006
1007 struct gl_array_attrib {
1008    struct gl_client_array Vertex;            /* client data descriptors */
1009    struct gl_client_array Normal;
1010    struct gl_client_array Color;
1011    struct gl_client_array SecondaryColor;
1012    struct gl_client_array FogCoord;
1013    struct gl_client_array Index;
1014    struct gl_client_array TexCoord[MAX_TEXTURE_UNITS];
1015    struct gl_client_array EdgeFlag;
1016
1017    GLint TexCoordInterleaveFactor;
1018    GLint ActiveTexture;         /* Client Active Texture */
1019    GLuint LockFirst;
1020    GLuint LockCount;
1021
1022    GLuint _Enabled;             /* _NEW_ARRAY_* - bit set if array enabled */
1023    GLuint NewState;             /* _NEW_ARRAY_* */
1024 };
1025
1026
1027 struct gl_feedback {
1028    GLenum Type;
1029    GLuint _Mask;                /* FB_* bits */
1030    GLfloat *Buffer;
1031    GLuint BufferSize;
1032    GLuint Count;
1033 };
1034
1035
1036 struct gl_selection {
1037    GLuint *Buffer;
1038    GLuint BufferSize;   /* size of SelectBuffer */
1039    GLuint BufferCount;  /* number of values in SelectBuffer */
1040    GLuint Hits;         /* number of records in SelectBuffer */
1041    GLuint NameStackDepth;
1042    GLuint NameStack[MAX_NAME_STACK_DEPTH];
1043    GLboolean HitFlag;
1044    GLfloat HitMinZ, HitMaxZ;
1045 };
1046
1047
1048 /*
1049  * 1-D Evaluator control points
1050  */
1051 struct gl_1d_map {
1052    GLuint Order;        /* Number of control points */
1053    GLfloat u1, u2, du;  /* u1, u2, 1.0/(u2-u1) */
1054    GLfloat *Points;     /* Points to contiguous control points */
1055 };
1056
1057
1058 /*
1059  * 2-D Evaluator control points
1060  */
1061 struct gl_2d_map {
1062    GLuint Uorder;               /* Number of control points in U dimension */
1063    GLuint Vorder;               /* Number of control points in V dimension */
1064    GLfloat u1, u2, du;
1065    GLfloat v1, v2, dv;
1066    GLfloat *Points;             /* Points to contiguous control points */
1067 };
1068
1069
1070 /*
1071  * All evalutator control points
1072  */
1073 struct gl_evaluators {
1074    /* 1-D maps */
1075    struct gl_1d_map Map1Vertex3;
1076    struct gl_1d_map Map1Vertex4;
1077    struct gl_1d_map Map1Index;
1078    struct gl_1d_map Map1Color4;
1079    struct gl_1d_map Map1Normal;
1080    struct gl_1d_map Map1Texture1;
1081    struct gl_1d_map Map1Texture2;
1082    struct gl_1d_map Map1Texture3;
1083    struct gl_1d_map Map1Texture4;
1084
1085    /* 2-D maps */
1086    struct gl_2d_map Map2Vertex3;
1087    struct gl_2d_map Map2Vertex4;
1088    struct gl_2d_map Map2Index;
1089    struct gl_2d_map Map2Color4;
1090    struct gl_2d_map Map2Normal;
1091    struct gl_2d_map Map2Texture1;
1092    struct gl_2d_map Map2Texture2;
1093    struct gl_2d_map Map2Texture3;
1094    struct gl_2d_map Map2Texture4;
1095 };
1096
1097
1098 /*
1099  * State which can be shared by multiple contexts:
1100  */
1101 struct gl_shared_state {
1102    _glthread_Mutex Mutex;                  /* for thread safety */
1103    GLint RefCount;                         /* Reference count */
1104    struct _mesa_HashTable *DisplayList;    /* Display lists hash table */
1105    struct _mesa_HashTable *TexObjects;     /* Texture objects hash table */
1106    struct gl_texture_object *TexObjectList;/* Linked list of texture objects */
1107
1108    /* Default texture objects (shared by all multi-texture units) */
1109    struct gl_texture_object *Default1D;
1110    struct gl_texture_object *Default2D;
1111    struct gl_texture_object *Default3D;
1112    struct gl_texture_object *DefaultCubeMap;
1113
1114    void *DriverData;  /* Device driver shared state */
1115 };
1116
1117
1118 /*
1119  * A "frame buffer" is a color buffer and its optional ancillary buffers:
1120  * depth, accum, stencil, and software-simulated alpha buffers.
1121  * In C++ terms, think of this as a base class from which device drivers
1122  * will make derived classes.
1123  */
1124 struct gl_frame_buffer {
1125    GLvisual Visual;             /* The corresponding visual */
1126
1127    GLint Width, Height;         /* size of frame buffer in pixels */
1128
1129    GLboolean UseSoftwareDepthBuffer;
1130    GLboolean UseSoftwareAccumBuffer;
1131    GLboolean UseSoftwareStencilBuffer;
1132    GLboolean UseSoftwareAlphaBuffers;
1133
1134    /* Software depth (aka Z) buffer */
1135    GLvoid *DepthBuffer;         /* array [Width*Height] of GLushort or GLuint*/
1136
1137    /* Software stencil buffer */
1138    GLstencil *Stencil;          /* array [Width*Height] of GLstencil values */
1139
1140    /* Software accumulation buffer */
1141    GLaccum *Accum;              /* array [4*Width*Height] of GLaccum values */
1142
1143    /* Software alpha planes */
1144    GLchan *FrontLeftAlpha;      /* array [Width*Height] of GLubyte */
1145    GLchan *BackLeftAlpha;       /* array [Width*Height] of GLubyte */
1146    GLchan *FrontRightAlpha;     /* array [Width*Height] of GLubyte */
1147    GLchan *BackRightAlpha;      /* array [Width*Height] of GLubyte */
1148    GLchan *Alpha;               /* Points to current alpha buffer */
1149
1150    /* Drawing bounds: intersection of window size and scissor box */
1151    GLint _Xmin, _Ymin;  /* inclusive */
1152    GLint _Xmax, _Ymax;  /* exclusive */
1153 };
1154
1155
1156 /*
1157  * Constants which may be overriden by device driver during context creation
1158  * but are never changed after that.
1159  */
1160 struct gl_constants {
1161    GLint MaxTextureLevels;
1162    GLint Max3DTextureLevels;
1163    GLint MaxCubeTextureLevels;
1164    GLuint MaxTextureUnits;
1165    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
1166    GLuint MaxArrayLockSize;
1167    GLint SubPixelBits;
1168    GLfloat MinPointSize, MaxPointSize;          /* aliased */
1169    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
1170    GLfloat PointSizeGranularity;
1171    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
1172    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
1173    GLfloat LineWidthGranularity;
1174    GLuint NumAuxBuffers;
1175    GLuint MaxColorTableSize;
1176    GLuint MaxConvolutionWidth;
1177    GLuint MaxConvolutionHeight;
1178    GLuint NumCompressedTextureFormats;  /* GL_ARB_texture_compression */
1179    GLenum CompressedTextureFormats[MAX_COMPRESSED_TEXTURE_FORMATS];
1180    GLuint MaxClipPlanes;
1181    GLuint MaxLights;
1182 };
1183
1184
1185 /*
1186  * List of extensions.
1187  */
1188 struct extension;
1189 struct gl_extensions {
1190    char *ext_string;
1191    struct extension *ext_list;
1192    /* Flags to quickly test if certain extensions are available.
1193     * Not every extension needs to have such a flag, but it's encouraged.
1194     */
1195    GLboolean ARB_imaging;
1196    GLboolean ARB_multisample;
1197    GLboolean ARB_multitexture;
1198    GLboolean ARB_texture_border_clamp;
1199    GLboolean ARB_texture_compression;
1200    GLboolean ARB_texture_cube_map;
1201    GLboolean ARB_texture_env_combine;
1202    GLboolean ARB_texture_env_dot3;
1203    GLboolean EXT_blend_color;
1204    GLboolean EXT_blend_func_separate;
1205    GLboolean EXT_blend_logic_op;
1206    GLboolean EXT_blend_minmax;
1207    GLboolean EXT_blend_subtract;
1208    GLboolean EXT_clip_volume_hint;
1209    GLboolean EXT_convolution;
1210    GLboolean EXT_compiled_vertex_array;
1211    GLboolean EXT_fog_coord;
1212    GLboolean EXT_histogram;
1213    GLboolean EXT_packed_pixels;
1214    GLboolean EXT_paletted_texture;
1215    GLboolean EXT_point_parameters;
1216    GLboolean EXT_polygon_offset;
1217    GLboolean EXT_rescale_normal;
1218    GLboolean EXT_secondary_color;
1219    GLboolean EXT_shared_texture_palette;
1220    GLboolean EXT_stencil_wrap;
1221    GLboolean EXT_texture3D;
1222    GLboolean EXT_texture_compression_s3tc;
1223    GLboolean EXT_texture_env_add;
1224    GLboolean EXT_texture_env_combine;
1225    GLboolean EXT_texture_env_dot3;
1226    GLboolean EXT_texture_filter_anisotropic;
1227    GLboolean EXT_texture_object;
1228    GLboolean EXT_texture_lod_bias;
1229    GLboolean EXT_vertex_array_set;
1230    GLboolean HP_occlusion_test;
1231    GLboolean IBM_rasterpos_clip;
1232    GLboolean INGR_blend_func_separate;
1233    GLboolean MESA_window_pos;
1234    GLboolean MESA_resize_buffers;
1235    GLboolean MESA_sprite_point;
1236    GLboolean NV_blend_square;
1237    GLboolean NV_texgen_reflection;
1238    GLboolean SGI_color_matrix;
1239    GLboolean SGI_color_table;
1240    GLboolean SGIS_generate_mipmap;
1241    GLboolean SGIS_pixel_texture;
1242    GLboolean SGIS_texture_edge_clamp;
1243    GLboolean SGIX_depth_texture;
1244    GLboolean SGIX_pixel_texture;
1245    GLboolean SGIX_shadow;
1246    GLboolean SGIX_shadow_ambient;
1247    GLboolean _3DFX_texture_compression_FXT1;
1248 };
1249
1250
1251
1252 /*
1253  * Bits for image transfer operations (ctx->ImageTransferState).
1254  */
1255 #define IMAGE_SCALE_BIAS_BIT                      0x1
1256 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
1257 #define IMAGE_MAP_COLOR_BIT                       0x4
1258 #define IMAGE_COLOR_TABLE_BIT                     0x8
1259 #define IMAGE_CONVOLUTION_BIT                     0x10
1260 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
1261 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
1262 #define IMAGE_COLOR_MATRIX_BIT                    0x80
1263 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
1264 #define IMAGE_HISTOGRAM_BIT                       0x200
1265 #define IMAGE_MIN_MAX_BIT                         0x400
1266
1267 /* transfer ops up to convolution: */
1268 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
1269                                     IMAGE_SHIFT_OFFSET_BIT |   \
1270                                     IMAGE_MAP_COLOR_BIT |      \
1271                                     IMAGE_COLOR_TABLE_BIT)
1272
1273 /* transfer ops after convolution: */
1274 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
1275                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
1276                                      IMAGE_COLOR_MATRIX_BIT |                 \
1277                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
1278                                      IMAGE_HISTOGRAM_BIT |                    \
1279                                      IMAGE_MIN_MAX_BIT)
1280
1281
1282 /*
1283  * Bits to indicate what state has changed.  6 unused flags.
1284  */
1285 #define _NEW_MODELVIEW          0x1        /* ctx->ModelView */
1286 #define _NEW_PROJECTION         0x2        /* ctx->Projection */
1287 #define _NEW_TEXTURE_MATRIX     0x4        /* ctx->TextureMatrix */
1288 #define _NEW_COLOR_MATRIX       0x8        /* ctx->ColorMatrix */
1289 #define _NEW_ACCUM              0x10       /* ctx->Accum */
1290 #define _NEW_COLOR              0x20       /* ctx->Color */
1291 #define _NEW_DEPTH              0x40       /* ctx->Depth */
1292 #define _NEW_EVAL               0x80       /* ctx->Eval, ctx->EvalMap */
1293 #define _NEW_FOG                0x100      /* ctx->Fog */
1294 #define _NEW_HINT               0x200      /* ctx->Hint */
1295 #define _NEW_LIGHT              0x400      /* ctx->Light */
1296 #define _NEW_LINE               0x800      /* ctx->Line */
1297 #define _NEW_PIXEL              0x1000     /* ctx->Pixel */
1298 #define _NEW_POINT              0x2000     /* ctx->Point */
1299 #define _NEW_POLYGON            0x4000     /* ctx->Polygon */
1300 #define _NEW_POLYGONSTIPPLE     0x8000     /* ctx->PolygonStipple */
1301 #define _NEW_SCISSOR            0x10000    /* ctx->Scissor */
1302 #define _NEW_STENCIL            0x20000    /* ctx->Stencil */
1303 #define _NEW_TEXTURE            0x40000    /* ctx->Texture */
1304 #define _NEW_TRANSFORM          0x80000    /* ctx->Transform */
1305 #define _NEW_VIEWPORT           0x100000   /* ctx->Viewport */
1306 #define _NEW_PACKUNPACK         0x200000   /* ctx->Pack, ctx->Unpack */
1307 #define _NEW_ARRAY              0x400000   /* ctx->Array */
1308 #define _NEW_RENDERMODE         0x800000   /* RenderMode, Feedback, Select */
1309 #define _NEW_BUFFERS            0x1000000  /* ctx->Visual, ctx->DrawBuffer, */
1310 #define _NEW_MULTISAMPLE        0x2000000  /* ctx->Multisample */
1311 #define _NEW_ALL ~0
1312
1313
1314
1315 /* Bits to track array state changes (also used to summarize array enabled)
1316  */
1317 #define _NEW_ARRAY_VERTEX           0x1
1318 #define _NEW_ARRAY_COLOR            0x2
1319 #define _NEW_ARRAY_NORMAL           0x4
1320 #define _NEW_ARRAY_INDEX            0x8
1321 #define _NEW_ARRAY_EDGEFLAG         0x10
1322 #define _NEW_ARRAY_SECONDARYCOLOR   0x20
1323 #define _NEW_ARRAY_FOGCOORD         0x40
1324 #define _NEW_ARRAY_TEXCOORD_0       0x80
1325 #define _NEW_ARRAY_TEXCOORD_1       0x100
1326 #define _NEW_ARRAY_TEXCOORD_2       0x200
1327 #define _NEW_ARRAY_TEXCOORD_3       0x400
1328 #define _NEW_ARRAY_TEXCOORD_4       0x800
1329 #define _NEW_ARRAY_TEXCOORD_5       0x1000
1330 #define _NEW_ARRAY_TEXCOORD_6       0x2000
1331 #define _NEW_ARRAY_TEXCOORD_7       0x4000
1332 #define _NEW_ARRAY_ALL              0x7fff
1333
1334 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
1335
1336 /* A bunch of flags that we think might be useful to drivers.
1337  */
1338 #define DD_FLATSHADE                0x1
1339 #define DD_SEPARATE_SPECULAR        0x2
1340 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
1341 #define DD_TRI_LIGHT_TWOSIDE        0x8
1342 #define DD_TRI_UNFILLED             0x10
1343 #define DD_TRI_SMOOTH               0x20
1344 #define DD_TRI_STIPPLE              0x40
1345 #define DD_TRI_OFFSET               0x80
1346 #define DD_LINE_SMOOTH              0x100
1347 #define DD_LINE_STIPPLE             0x200
1348 #define DD_LINE_WIDTH               0x400
1349 #define DD_POINT_SMOOTH             0x800
1350 #define DD_POINT_SIZE               0x1000
1351 #define DD_POINT_ATTEN              0x2000
1352
1353 /* Define the state changes under which each of these bits might change
1354  */
1355 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
1356 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG)
1357 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
1358 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
1359 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
1360 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
1361 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
1362 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
1363 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
1364 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
1365 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
1366 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
1367 #define _DD_NEW_POINT_SIZE               _NEW_POINT
1368 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
1369
1370 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
1371                                            _NEW_TEXTURE |       \
1372                                            _NEW_POINT |         \
1373                                            _NEW_MODELVIEW)
1374
1375 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
1376                                            _NEW_TEXTURE)
1377
1378 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
1379
1380
1381 #define NEED_NORMALS_TEXGEN      0x1
1382 #define NEED_NORMALS_LIGHT       0x2
1383
1384 #define NEED_EYE_TEXGEN          0x1
1385 #define NEED_EYE_LIGHT           0x2
1386 #define NEED_EYE_LIGHT_MODELVIEW 0x4
1387 #define NEED_EYE_POINT_ATTEN     0x8
1388
1389
1390 /*
1391  * Forward declaration of display list datatypes:
1392  */
1393 union node;
1394 typedef union node Node;
1395
1396
1397 /* This has to be included here. */
1398 #include "dd.h"
1399
1400
1401 /*
1402  * Core Mesa's support for tnl modules:
1403  */
1404 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
1405
1406 struct gl_tnl_module {
1407    /* Vertex format to be lazily swapped into current dispatch.
1408     */
1409    GLvertexformat *Current;
1410
1411    /* Record of functions swapped out.  On restore, only need to swap
1412     * these functions back in.
1413     */
1414    void *Swapped[NUM_VERTEX_FORMAT_ENTRIES][2];
1415    GLuint SwapCount;
1416 };
1417
1418
1419 /*
1420  * The library context:
1421  */
1422 struct __GLcontextRec {
1423    /*
1424    ** Os related interfaces; these *must* be the first members of this
1425    ** structure, because they are exposed to the outside world (i.e. GLX
1426    ** extension).
1427    */
1428    __GLimports imports;
1429    __GLexports exports;
1430
1431    /* State possibly shared with other contexts in the address space */
1432    struct gl_shared_state *Shared;
1433
1434    /* API function pointer tables */
1435    struct _glapi_table *Save;   /* Display list save funcs */
1436    struct _glapi_table *Exec;   /* Execute funcs */
1437    struct _glapi_table *CurrentDispatch;  /* == Save or Exec !! */
1438
1439    GLboolean ExecPrefersFloat;  /* What preference for color conversion? */
1440    GLboolean SavePrefersFloat;
1441
1442    GLvisual Visual;
1443    GLframebuffer *DrawBuffer;   /* buffer for writing */
1444    GLframebuffer *ReadBuffer;   /* buffer for reading */
1445
1446    /* Driver function pointer table */
1447    struct dd_function_table Driver;
1448
1449    void *DriverCtx;     /* Points to device driver context/state */
1450    void *DriverMgrCtx;  /* Points to device driver manager (optional)*/
1451
1452    /* Core/Driver constants */
1453    struct gl_constants Const;
1454
1455    /* Modelview matrix and stack */
1456    GLmatrix ModelView;           /* current matrix, not stored on stack */
1457    GLuint ModelViewStackDepth;
1458    GLmatrix ModelViewStack[MAX_MODELVIEW_STACK_DEPTH - 1];
1459
1460    /* Projection matrix and stack */
1461    GLmatrix ProjectionMatrix;    /* current matrix, not stored on stack */
1462    GLuint ProjectionStackDepth;
1463    GLmatrix ProjectionStack[MAX_PROJECTION_STACK_DEPTH - 1];
1464
1465    /* Combined modelview and projection matrix */
1466    GLmatrix _ModelProjectMatrix;
1467
1468    /* Texture matrix and stack */
1469    GLmatrix TextureMatrix[MAX_TEXTURE_UNITS];
1470    GLuint TextureStackDepth[MAX_TEXTURE_UNITS];
1471    GLmatrix TextureStack[MAX_TEXTURE_UNITS][MAX_TEXTURE_STACK_DEPTH - 1];
1472
1473    /* Color matrix and stack */
1474    GLmatrix ColorMatrix;
1475    GLuint ColorStackDepth;
1476    GLmatrix ColorStack[MAX_COLOR_STACK_DEPTH - 1];
1477
1478    /* Display lists */
1479    GLuint CallDepth;            /* Current recursion calling depth */
1480    GLboolean ExecuteFlag;       /* Execute GL commands? */
1481    GLboolean CompileFlag;       /* Compile GL commands into display list? */
1482    Node *CurrentListPtr;        /* Head of list being compiled */
1483    GLuint CurrentListNum;       /* Number of the list being compiled */
1484    Node *CurrentBlock;          /* Pointer to current block of nodes */
1485    GLuint CurrentPos;           /* Index into current block of nodes */
1486
1487    /* Extensions */
1488    struct gl_extensions Extensions;
1489
1490    /* Renderer attribute stack */
1491    GLuint AttribStackDepth;
1492    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
1493
1494    /* Renderer attribute groups */
1495    struct gl_accum_attrib       Accum;
1496    struct gl_colorbuffer_attrib Color;
1497    struct gl_current_attrib     Current;
1498    struct gl_depthbuffer_attrib Depth;
1499    struct gl_eval_attrib        Eval;
1500    struct gl_fog_attrib         Fog;
1501    struct gl_hint_attrib        Hint;
1502    struct gl_light_attrib       Light;
1503    struct gl_line_attrib        Line;
1504    struct gl_list_attrib        List;
1505    struct gl_multisample_attrib Multisample;
1506    struct gl_pixel_attrib       Pixel;
1507    struct gl_point_attrib       Point;
1508    struct gl_polygon_attrib     Polygon;
1509    GLuint PolygonStipple[32];
1510    struct gl_scissor_attrib     Scissor;
1511    struct gl_stencil_attrib     Stencil;
1512    struct gl_texture_attrib     Texture;
1513    struct gl_transform_attrib   Transform;
1514    struct gl_viewport_attrib    Viewport;
1515
1516    /* Other attribute groups */
1517    struct gl_histogram_attrib   Histogram;
1518    struct gl_minmax_attrib      MinMax;
1519    struct gl_convolution_attrib Convolution1D;
1520    struct gl_convolution_attrib Convolution2D;
1521    struct gl_convolution_attrib Separable2D;
1522
1523    /* Client attribute stack */
1524    GLuint ClientAttribStackDepth;
1525    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
1526
1527    /* Client attribute groups */
1528    struct gl_array_attrib       Array;  /* Vertex arrays */
1529    struct gl_pixelstore_attrib  Pack;   /* Pixel packing */
1530    struct gl_pixelstore_attrib  Unpack; /* Pixel unpacking */
1531
1532    struct gl_evaluators EvalMap;   /* All evaluators */
1533    struct gl_feedback   Feedback;  /* Feedback */
1534    struct gl_selection  Select;    /* Selection */
1535
1536    struct gl_color_table ColorTable;       /* Pre-convolution */
1537    struct gl_color_table ProxyColorTable;  /* Pre-convolution */
1538    struct gl_color_table PostConvolutionColorTable;
1539    struct gl_color_table ProxyPostConvolutionColorTable;
1540    struct gl_color_table PostColorMatrixColorTable;
1541    struct gl_color_table ProxyPostColorMatrixColorTable;
1542
1543    GLenum ErrorValue;        /* Last error code */
1544    GLenum RenderMode;        /* either GL_RENDER, GL_SELECT, GL_FEEDBACK */
1545    GLuint NewState;          /* bitwise-or of _NEW_* flags */
1546
1547    /* Derived */
1548    GLuint _TriangleCaps;      /* bitwise-or of DD_* flags */
1549    GLuint _ImageTransferState;/* bitwise-or of IMAGE_*_BIT flags */
1550    GLfloat _EyeZDir[3];
1551    GLfloat _ModelViewInvScale;
1552    GLuint _NeedEyeCoords;
1553    GLuint _NeedNormals;    /* Are vertex normal vectors needed? */
1554
1555    struct gl_shine_tab *_ShineTable[2];  /* Active shine tables */
1556    struct gl_shine_tab *_ShineTabList;   /* Mru list of inactive shine tables */
1557
1558    struct gl_list_extensions listext; /* driver dlist extensions */
1559
1560
1561    GLboolean OcclusionResult;  /* GL_HP_occlusion_test */
1562    GLboolean OcclusionResultSaved;  /* GL_HP_occlusion_test */
1563
1564    /* Z buffer stuff */
1565    GLuint DepthMax;             /* Max depth buffer value */
1566    GLfloat DepthMaxF;           /* Float max depth buffer value */
1567    GLfloat MRD;                 /* minimum resolvable difference in Z values */
1568
1569    /* Should 3Dfx Glide driver catch signals? */
1570    GLboolean CatchSignals;
1571
1572    /* For debugging/development only */
1573    GLboolean NoRaster;
1574    GLboolean FirstTimeCurrent;
1575
1576    /* Dither disable via MESA_NO_DITHER env var */
1577    GLboolean NoDither;
1578
1579    GLboolean Rendering;
1580
1581 #if defined(MESA_TRACE)
1582    struct _glapi_table *TraceDispatch;
1583    trace_context_t     *TraceCtx;
1584 #else
1585    void *TraceDispatch;
1586    void *TraceCtx;
1587 #endif
1588
1589    /* Core tnl module support */
1590    struct gl_tnl_module TnlModule;
1591
1592    /* Hooks for module contexts.  These will eventually live
1593     * in the driver or elsewhere.
1594     */
1595    void *swrast_context;
1596    void *swsetup_context;
1597    void *swtnl_context;
1598    void *swtnl_im;
1599    void *acache_context;
1600    void *aelt_context;
1601 };
1602
1603
1604 /* The string names for GL_POINT, GL_LINE_LOOP, etc */
1605 extern const char *_mesa_prim_name[GL_POLYGON+4];
1606
1607
1608 #ifdef MESA_DEBUG
1609 extern int MESA_VERBOSE;
1610 extern int MESA_DEBUG_FLAGS;
1611 #else
1612 # define MESA_VERBOSE 0
1613 # define MESA_DEBUG_FLAGS 0
1614 # ifndef NDEBUG
1615 #  define NDEBUG
1616 # endif
1617 #endif
1618
1619
1620 enum _verbose {
1621    VERBOSE_VARRAY               = 0x0001,
1622    VERBOSE_TEXTURE              = 0x0002,
1623    VERBOSE_IMMEDIATE            = 0x0004,
1624    VERBOSE_PIPELINE             = 0x0008,
1625    VERBOSE_DRIVER               = 0x0010,
1626    VERBOSE_STATE                = 0x0020,
1627    VERBOSE_API                  = 0x0040,
1628    VERBOSE_DISPLAY_LIST         = 0x0200,
1629    VERBOSE_LIGHTING             = 0x0400
1630 };
1631
1632
1633 enum _debug {
1634    DEBUG_ALWAYS_FLUSH           = 0x1
1635 };
1636
1637
1638
1639 #define Elements(x) sizeof(x)/sizeof(*(x))
1640
1641
1642
1643 /* Eventually let the driver specify what statechanges require a flush:
1644  */
1645 #define FLUSH_VERTICES(ctx, newstate)                                   \
1646 do {                                                                    \
1647    if (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES)                   \
1648       ctx->Driver.FlushVertices(ctx, FLUSH_STORED_VERTICES);            \
1649    ctx->NewState |= newstate;                                           \
1650 } while (0)
1651
1652 #define FLUSH_CURRENT(ctx, newstate)                                    \
1653 do {                                                                    \
1654    if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT)                    \
1655       ctx->Driver.FlushVertices(ctx, FLUSH_UPDATE_CURRENT);             \
1656    ctx->NewState |= newstate;                                           \
1657 } while (0)
1658
1659 #define ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval)               \
1660 do {                                                                    \
1661    if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) {    \
1662       _mesa_error( ctx, GL_INVALID_OPERATION, "begin/end" );            \
1663       return retval;                                                    \
1664    }                                                                    \
1665 } while (0)
1666
1667 #define ASSERT_OUTSIDE_BEGIN_END(ctx)                                   \
1668 do {                                                                    \
1669    if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) {    \
1670       _mesa_error( ctx, GL_INVALID_OPERATION, "begin/end" );            \
1671       return;                                                           \
1672    }                                                                    \
1673 } while (0)
1674
1675 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx)                         \
1676 do {                                                                    \
1677    ASSERT_OUTSIDE_BEGIN_END(ctx);                                       \
1678    FLUSH_VERTICES(ctx, 0);                                              \
1679 } while (0)
1680
1681 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx, retval)     \
1682 do {                                                                    \
1683    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval);                   \
1684    FLUSH_VERTICES(ctx, 0);                                              \
1685 } while (0)
1686
1687
1688
1689
1690 #endif /* TYPES_H */