src/mesa/main/mtypes.h

   1 /**
   2  * \file mtypes.h
   3  * Main Mesa data structures.
   4  *
   5  * Please try to mark derived values with a leading underscore ('_').
   6  */
   7
   8 /*
   9  * Mesa 3-D graphics library
  10  * Version:  6.1
  11  *
  12  * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the "Software"),
  16  * to deal in the Software without restriction, including without limitation
  17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  18  * and/or sell copies of the Software, and to permit persons to whom the
  19  * Software is furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice shall be included
  22  * in all copies or substantial portions of the Software.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  25  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  27  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  28  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30  */
  31
  32
  33
  34 #ifndef TYPES_H
  35 #define TYPES_H
  36
  37
  38 #include "glheader.h"
  39 #include "config.h"             /* Hardwired parameters */
  40 #include "glapitable.h"
  41 #include "glthread.h"
  42 #include "math/m_matrix.h"      /* GLmatrix */
  43
  44
  45 /**
  46  * Color channel data type.
  47  */
  48 #if CHAN_BITS == 8
  49    typedef GLubyte GLchan;
  50 #define CHAN_MAX 255
  51 #define CHAN_MAXF 255.0F
  52 #define CHAN_TYPE GL_UNSIGNED_BYTE
  53 #elif CHAN_BITS == 16
  54    typedef GLushort GLchan;
  55 #define CHAN_MAX 65535
  56 #define CHAN_MAXF 65535.0F
  57 #define CHAN_TYPE GL_UNSIGNED_SHORT
  58 #elif CHAN_BITS == 32
  59    typedef GLfloat GLchan;
  60 #define CHAN_MAX 1.0
  61 #define CHAN_MAXF 1.0F
  62 #define CHAN_TYPE GL_FLOAT
  63 #else
  64 #error "illegal number of color channel bits"
  65 #endif
  66
  67
  68 /**
  69  * Accumulation buffer data type.
  70  */
  71 #if ACCUM_BITS==8
  72    typedef GLbyte GLaccum;
  73 #elif ACCUM_BITS==16
  74    typedef GLshort GLaccum;
  75 #elif ACCUM_BITS==32
  76    typedef GLfloat GLaccum;
  77 #else
  78 #  error "illegal number of accumulation bits"
  79 #endif
  80
  81
  82 /**
  83  * Stencil buffer data type.
  84  */
  85 #if STENCIL_BITS==8
  86    typedef GLubyte GLstencil;
  87 #  define STENCIL_MAX 0xff
  88 #elif STENCIL_BITS==16
  89    typedef GLushort GLstencil;
  90 #  define STENCIL_MAX 0xffff
  91 #else
  92 #  error "illegal number of stencil bits"
  93 #endif
  94
  95
  96 /**
  97  * Depth buffer data type.
  98  *
  99  * \note Must be 32-bits!
 100  */
 101 typedef GLuint GLdepth;
 102
 103
 104 /**
 105  * Fixed point data type.
 106  */
 107 typedef int GLfixed;
 108 /*
 109  * Fixed point arithmetic macros
 110  */
 111 #ifndef FIXED_FRAC_BITS
 112 #define FIXED_FRAC_BITS 11
 113 #endif
 114
 115 #define FIXED_SHIFT     FIXED_FRAC_BITS
 116 #define FIXED_ONE       (1 << FIXED_SHIFT)
 117 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
 118 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
 119 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
 120 #define FIXED_EPSILON   1
 121 #define FIXED_SCALE     ((float) FIXED_ONE)
 122 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 123 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 124 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 125 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 126 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 127 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 128 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 129 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 130 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 131 #define PosFloatToFixed(X)      FloatToFixed(X)
 132 #define SignedFloatToFixed(X)   FloatToFixed(X)
 133
 134
 135
 136 /**
 137  * \name Some forward type declarations
 138  */
 139 /*@{*/
 140 struct _mesa_HashTable;
 141 struct gl_texture_image;
 142 struct gl_texture_object;
 143 typedef struct __GLcontextRec GLcontext;
 144 typedef struct __GLcontextModesRec GLvisual;
 145 typedef struct gl_frame_buffer GLframebuffer;
 146 struct gl_pixelstore_attrib;
 147 struct gl_texture_format;
 148 /*@}*/
 149
 150
 151
 152 /**
 153  * These define the aliases between numbered vertex attributes and
 154  * conventional OpenGL vertex attributes.  We use these values in
 155  * quite a few places.
 156  *
 157  * New in Mesa 4.1.
 158  */
 159 enum {
 160         VERT_ATTRIB_POS = 0,
 161         VERT_ATTRIB_WEIGHT = 1,
 162         VERT_ATTRIB_NORMAL = 2,
 163         VERT_ATTRIB_COLOR0 = 3,
 164         VERT_ATTRIB_COLOR1 = 4,
 165         VERT_ATTRIB_FOG = 5,
 166         VERT_ATTRIB_SIX = 6,
 167         VERT_ATTRIB_SEVEN = 7,
 168         VERT_ATTRIB_TEX0 = 8,
 169         VERT_ATTRIB_TEX1 = 9,
 170         VERT_ATTRIB_TEX2 = 10,
 171         VERT_ATTRIB_TEX3 = 11,
 172         VERT_ATTRIB_TEX4 = 12,
 173         VERT_ATTRIB_TEX5 = 13,
 174         VERT_ATTRIB_TEX6 = 14,
 175         VERT_ATTRIB_TEX7 = 15,
 176         VERT_ATTRIB_MAX = 16
 177 } ;
 178
 179 /* These are used in bitfields in many places */
 180 #define VERT_BIT_POS     (1 << VERT_ATTRIB_POS)
 181 #define VERT_BIT_WEIGHT  (1 << VERT_ATTRIB_WEIGHT)
 182 #define VERT_BIT_NORMAL  (1 << VERT_ATTRIB_NORMAL)
 183 #define VERT_BIT_COLOR0  (1 << VERT_ATTRIB_COLOR0)
 184 #define VERT_BIT_COLOR1  (1 << VERT_ATTRIB_COLOR1)
 185 #define VERT_BIT_FOG     (1 << VERT_ATTRIB_FOG)
 186 #define VERT_BIT_SIX     (1 << VERT_ATTRIB_SIX)
 187 #define VERT_BIT_SEVEN   (1 << VERT_ATTRIB_SEVEN)
 188 #define VERT_BIT_TEX0    (1 << VERT_ATTRIB_TEX0)
 189 #define VERT_BIT_TEX1    (1 << VERT_ATTRIB_TEX1)
 190 #define VERT_BIT_TEX2    (1 << VERT_ATTRIB_TEX2)
 191 #define VERT_BIT_TEX3    (1 << VERT_ATTRIB_TEX3)
 192 #define VERT_BIT_TEX4    (1 << VERT_ATTRIB_TEX4)
 193 #define VERT_BIT_TEX5    (1 << VERT_ATTRIB_TEX5)
 194 #define VERT_BIT_TEX6    (1 << VERT_ATTRIB_TEX6)
 195 #define VERT_BIT_TEX7    (1 << VERT_ATTRIB_TEX7)
 196
 197 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 198
 199
 200 /* Fragment programs use a different but related set of attributes:
 201  */
 202
 203 /* Fragment input registers / attributes */
 204 #define FRAG_ATTRIB_WPOS  0
 205 #define FRAG_ATTRIB_COL0  1
 206 #define FRAG_ATTRIB_COL1  2
 207 #define FRAG_ATTRIB_FOGC  3
 208 #define FRAG_ATTRIB_TEX0  4
 209 #define FRAG_ATTRIB_TEX1  5
 210 #define FRAG_ATTRIB_TEX2  6
 211 #define FRAG_ATTRIB_TEX3  7
 212 #define FRAG_ATTRIB_TEX4  8
 213 #define FRAG_ATTRIB_TEX5  9
 214 #define FRAG_ATTRIB_TEX6  10
 215 #define FRAG_ATTRIB_TEX7  11
 216
 217 /* Bitmasks for the above */
 218 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 219 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 220 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 221 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 222 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 223 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 224 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 225 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 226 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 227 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 228 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 229 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 230
 231 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 232                            FRAG_BIT_TEX1|       \
 233                            FRAG_BIT_TEX2|       \
 234                            FRAG_BIT_TEX3|       \
 235                            FRAG_BIT_TEX4|       \
 236                            FRAG_BIT_TEX5|       \
 237                            FRAG_BIT_TEX6|       \
 238                            FRAG_BIT_TEX7)
 239
 240
 241 /**
 242  * Bits for each basic buffer in a complete framebuffer.
 243  * When glDrawBuffer(GL_FRONT_AND_BACK) is called (non-stereo),
 244  * _DrawDestMask will be set to (DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT),
 245  * for example.  Also passed to ctx->Driver.Clear() to indicate which
 246  * buffers to clear.
 247  */
 248 /*@{*/
 249 #define DD_FRONT_LEFT_BIT  0x1
 250 #define DD_FRONT_RIGHT_BIT 0x2
 251 #define DD_BACK_LEFT_BIT   0x4
 252 #define DD_BACK_RIGHT_BIT  0x8
 253 #define DD_AUX0_BIT        0x10
 254 #define DD_AUX1_BIT        0x20
 255 #define DD_AUX2_BIT        0x40
 256 #define DD_AUX3_BIT        0x80
 257 #define DD_DEPTH_BIT       GL_DEPTH_BUFFER_BIT    /* 0x00000100 */
 258 #define DD_ACCUM_BIT       GL_ACCUM_BUFFER_BIT    /* 0x00000200 */
 259 #define DD_STENCIL_BIT     GL_STENCIL_BUFFER_BIT  /* 0x00000400 */
 260 /*@}*/
 261
 262
 263 /**
 264  * Maximum number of temporary vertices required for clipping.
 265  *
 266  * Used in array_cache and tnl modules.
 267  */
 268 #define MAX_CLIPPED_VERTICES ((2 * (6 + MAX_CLIP_PLANES))+1)
 269
 270
 271 /**
 272  * Data structure for color tables
 273  */
 274 struct gl_color_table {
 275    GLenum Format;         /**< GL_ALPHA, GL_RGB, GL_RGB, etc */
 276    GLenum IntFormat;
 277    GLuint Size;           /**< number of entries (rows) in table */
 278    GLvoid *Table;         /**< points to data of <Type> */
 279    GLenum Type;           /**< GL_UNSIGNED_BYTE or GL_FLOAT */
 280    GLubyte RedSize;
 281    GLubyte GreenSize;
 282    GLubyte BlueSize;
 283    GLubyte AlphaSize;
 284    GLubyte LuminanceSize;
 285    GLubyte IntensitySize;
 286 };
 287
 288
 289 /**
 290  * \name Bit flags used for updating material values.
 291  */
 292 /*@{*/
 293 #define MAT_ATTRIB_FRONT_AMBIENT           0
 294 #define MAT_ATTRIB_BACK_AMBIENT            1
 295 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 296 #define MAT_ATTRIB_BACK_DIFFUSE            3
 297 #define MAT_ATTRIB_FRONT_SPECULAR          4
 298 #define MAT_ATTRIB_BACK_SPECULAR           5
 299 #define MAT_ATTRIB_FRONT_EMISSION          6
 300 #define MAT_ATTRIB_BACK_EMISSION           7
 301 #define MAT_ATTRIB_FRONT_SHININESS         8
 302 #define MAT_ATTRIB_BACK_SHININESS          9
 303 #define MAT_ATTRIB_FRONT_INDEXES           10
 304 #define MAT_ATTRIB_BACK_INDEXES            11
 305 #define MAT_ATTRIB_MAX                     12
 306
 307 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 308 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 309 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 310 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 311 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 312 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 313
 314 #define MAT_INDEX_AMBIENT  0
 315 #define MAT_INDEX_DIFFUSE  1
 316 #define MAT_INDEX_SPECULAR 2
 317
 318 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 319 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 320 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 321 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 322 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 323 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 324 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 325 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 326 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 327 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 328 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 329 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 330
 331
 332 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 333                                  MAT_BIT_FRONT_AMBIENT |        \
 334                                  MAT_BIT_FRONT_DIFFUSE |        \
 335                                  MAT_BIT_FRONT_SPECULAR |       \
 336                                  MAT_BIT_FRONT_SHININESS |      \
 337                                  MAT_BIT_FRONT_INDEXES)
 338
 339 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 340                                  MAT_BIT_BACK_AMBIENT |         \
 341                                  MAT_BIT_BACK_DIFFUSE |         \
 342                                  MAT_BIT_BACK_SPECULAR |        \
 343                                  MAT_BIT_BACK_SHININESS |       \
 344                                  MAT_BIT_BACK_INDEXES)
 345
 346 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 347 /*@}*/
 348
 349
 350 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 351 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 352
 353 /**
 354  * Material shininess lookup table.
 355  */
 356 struct gl_shine_tab {
 357    struct gl_shine_tab *next, *prev;
 358    GLfloat tab[SHINE_TABLE_SIZE+1];
 359    GLfloat shininess;
 360    GLuint refcount;
 361 };
 362
 363
 364 /**
 365  * Light.
 366  */
 367 struct gl_light {
 368    struct gl_light *next;       /**< double linked list with sentinel */
 369    struct gl_light *prev;
 370
 371    GLfloat Ambient[4];          /**< ambient color */
 372    GLfloat Diffuse[4];          /**< diffuse color */
 373    GLfloat Specular[4];         /**< specular color */
 374    GLfloat EyePosition[4];      /**< position in eye coordinates */
 375    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 376    GLfloat SpotExponent;
 377    GLfloat SpotCutoff;          /**< in degrees */
 378    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 379    GLfloat ConstantAttenuation;
 380    GLfloat LinearAttenuation;
 381    GLfloat QuadraticAttenuation;
 382    GLboolean Enabled;           /**< On/off flag */
 383
 384    /**
 385     * \name Derived fields
 386     */
 387    /*@{*/
 388    GLuint _Flags;               /**< State */
 389
 390    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 391    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 392    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 393    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 394    GLfloat _VP_inf_spot_attenuation;
 395
 396    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 397    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 398    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 399    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 400    GLfloat _dli;                /**< CI diffuse light intensity */
 401    GLfloat _sli;                /**< CI specular light intensity */
 402    /*@}*/
 403 };
 404
 405
 406 /**
 407  * Light model.
 408  */
 409 struct gl_lightmodel {
 410    GLfloat Ambient[4];          /**< ambient color */
 411    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 412    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 413    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 414                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 415 };
 416
 417
 418 /**
 419  * Material.
 420  */
 421 struct gl_material
 422 {
 423    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 424 };
 425
 426
 427 /**
 428  * Accumulation buffer attributes.
 429  */
 430 struct gl_accum_attrib {
 431    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 432 };
 433
 434
 435 /**
 436  * Color buffers attributes.
 437  */
 438 struct gl_colorbuffer_attrib {
 439    GLuint ClearIndex;                   /**< Index to use for glClear */
 440    GLclampf ClearColor[4];              /**< Color to use for glClear */
 441
 442    GLuint IndexMask;                    /**< Color index write mask */
 443    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 444
 445    GLenum DrawBuffer;                   /**< Which buffer to draw into */
 446    GLbitfield _DrawDestMask;            /**< bitmask of DD_*_BIT bits */
 447
 448    /**
 449     * \name alpha testing
 450     */
 451    /*@{*/
 452    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 453    GLenum AlphaFunc;                    /**< Alpha test function */
 454    GLclampf AlphaRef;                   /**< Alpha reference value */
 455    /*@}*/
 456
 457    /**
 458     * \name Blending
 459     */
 460    /*@{*/
 461    GLboolean BlendEnabled;              /**< Blending enabled flag */
 462    GLenum BlendSrcRGB;                  /**< Blending source operator */
 463    GLenum BlendDstRGB;                  /**< Blending destination operator */
 464    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 465    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 466    GLenum BlendEquationRGB;             /**< Blending equation */
 467    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 468    GLfloat BlendColor[4];               /**< Blending color */
 469    /*@}*/
 470
 471    /**
 472     * \name Logic op
 473     */
 474    /*@{*/
 475    GLenum LogicOp;                      /**< Logic operator */
 476    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 477    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 478    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 479    /*@}*/
 480
 481    GLboolean DitherFlag;                /**< Dither enable flag */
 482 };
 483
 484
 485 /**
 486  * Current attributes.
 487  */
 488 struct gl_current_attrib {
 489    /**
 490     * \name Values valid only when FLUSH_VERTICES has been called.
 491     */
 492    /*@{*/
 493    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 494                                                   *  indexed by VERT_ATTRIB_* */
 495    GLfloat Index;                               /**< Current color index */
 496    GLboolean EdgeFlag;                          /**< Current edge flag */
 497    /*@}*/
 498
 499    /**
 500     * \name Values are always valid.
 501     *
 502     * \note BTW, note how similar this set of attributes is to the SWvertex
 503     * data type in the software rasterizer...
 504     */
 505    /*@{*/
 506    GLfloat RasterPos[4];                        /**< Current raster position */
 507    GLfloat RasterDistance;                      /**< Current raster distance */
 508    GLfloat RasterColor[4];                      /**< Current raster color */
 509    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 510    GLfloat RasterIndex;                         /**< Current raster index */
 511    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 512    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 513    /*@}*/
 514 };
 515
 516
 517 /**
 518  * Depth buffer attributes.
 519  */
 520 struct gl_depthbuffer_attrib {
 521    GLenum Func;                 /**< Function for depth buffer compare */
 522    GLclampd Clear;              /**< Value to clear depth buffer to */
 523    GLboolean Test;              /**< Depth buffering enabled flag */
 524    GLboolean Mask;              /**< Depth buffer writable? */
 525    GLboolean OcclusionTest;     /**< GL_HP_occlusion_test */
 526    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 527    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 528 };
 529
 530
 531 /**
 532  * glEnable()/glDisable() attributes.
 533  */
 534 struct gl_enable_attrib {
 535    GLboolean AlphaTest;
 536    GLboolean AutoNormal;
 537    GLboolean Blend;
 538    GLuint ClipPlanes;
 539    GLboolean ColorMaterial;
 540    GLboolean ColorTable;                /* SGI_color_table */
 541    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 542    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 543    GLboolean Convolution1D;
 544    GLboolean Convolution2D;
 545    GLboolean Separable2D;
 546    GLboolean CullFace;
 547    GLboolean DepthTest;
 548    GLboolean Dither;
 549    GLboolean Fog;
 550    GLboolean Histogram;
 551    GLboolean Light[MAX_LIGHTS];
 552    GLboolean Lighting;
 553    GLboolean LineSmooth;
 554    GLboolean LineStipple;
 555    GLboolean IndexLogicOp;
 556    GLboolean ColorLogicOp;
 557    GLboolean Map1Color4;
 558    GLboolean Map1Index;
 559    GLboolean Map1Normal;
 560    GLboolean Map1TextureCoord1;
 561    GLboolean Map1TextureCoord2;
 562    GLboolean Map1TextureCoord3;
 563    GLboolean Map1TextureCoord4;
 564    GLboolean Map1Vertex3;
 565    GLboolean Map1Vertex4;
 566    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 567    GLboolean Map2Color4;
 568    GLboolean Map2Index;
 569    GLboolean Map2Normal;
 570    GLboolean Map2TextureCoord1;
 571    GLboolean Map2TextureCoord2;
 572    GLboolean Map2TextureCoord3;
 573    GLboolean Map2TextureCoord4;
 574    GLboolean Map2Vertex3;
 575    GLboolean Map2Vertex4;
 576    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 577    GLboolean MinMax;
 578    GLboolean Normalize;
 579    GLboolean PixelTexture;
 580    GLboolean PointSmooth;
 581    GLboolean PolygonOffsetPoint;
 582    GLboolean PolygonOffsetLine;
 583    GLboolean PolygonOffsetFill;
 584    GLboolean PolygonSmooth;
 585    GLboolean PolygonStipple;
 586    GLboolean RescaleNormals;
 587    GLboolean Scissor;
 588    GLboolean Stencil;
 589    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 590    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 591    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 592    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 593    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 594    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 595    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 596    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 597    /* SGI_texture_color_table */
 598    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 599    /* GL_NV_vertex_program */
 600    GLboolean VertexProgram;
 601    GLboolean VertexProgramPointSize;
 602    GLboolean VertexProgramTwoSide;
 603    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 604    GLboolean PointSprite;
 605 };
 606
 607
 608 /**
 609  * Eval attributes.
 610  */
 611 struct gl_eval_attrib {
 612    /**
 613     * \name Enable bits
 614     */
 615    /*@{*/
 616    GLboolean Map1Color4;
 617    GLboolean Map1Index;
 618    GLboolean Map1Normal;
 619    GLboolean Map1TextureCoord1;
 620    GLboolean Map1TextureCoord2;
 621    GLboolean Map1TextureCoord3;
 622    GLboolean Map1TextureCoord4;
 623    GLboolean Map1Vertex3;
 624    GLboolean Map1Vertex4;
 625    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 626    GLboolean Map2Color4;
 627    GLboolean Map2Index;
 628    GLboolean Map2Normal;
 629    GLboolean Map2TextureCoord1;
 630    GLboolean Map2TextureCoord2;
 631    GLboolean Map2TextureCoord3;
 632    GLboolean Map2TextureCoord4;
 633    GLboolean Map2Vertex3;
 634    GLboolean Map2Vertex4;
 635    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 636    GLboolean AutoNormal;
 637    /*@}*/
 638
 639    /**
 640     * \name Map Grid endpoints and divisions and calculated du values
 641     */
 642    /*@{*/
 643    GLint MapGrid1un;
 644    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 645    GLint MapGrid2un, MapGrid2vn;
 646    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 647    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 648    /*@}*/
 649 };
 650
 651
 652 /**
 653  * Fog attributes.
 654  */
 655 struct gl_fog_attrib {
 656    GLboolean Enabled;           /**< Fog enabled flag */
 657    GLfloat Color[4];            /**< Fog color */
 658    GLfloat Density;             /**< Density >= 0.0 */
 659    GLfloat Start;               /**< Start distance in eye coords */
 660    GLfloat End;                 /**< End distance in eye coords */
 661    GLfloat Index;               /**< Fog index */
 662    GLenum Mode;                 /**< Fog mode */
 663    GLboolean ColorSumEnabled;
 664    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 665 };
 666
 667
 668 /**
 669  * Hint attributes.
 670  *
 671  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 672  */
 673 struct gl_hint_attrib {
 674    GLenum PerspectiveCorrection;
 675    GLenum PointSmooth;
 676    GLenum LineSmooth;
 677    GLenum PolygonSmooth;
 678    GLenum Fog;
 679    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 680    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 681    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 682 };
 683
 684
 685 /**
 686  * Histogram attributes.
 687  */
 688 struct gl_histogram_attrib {
 689    GLuint Width;                                /**< number of table entries */
 690    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 691    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 692    GLboolean Sink;                              /**< terminate image transfer? */
 693    GLubyte RedSize;                             /**< Bits per counter */
 694    GLubyte GreenSize;
 695    GLubyte BlueSize;
 696    GLubyte AlphaSize;
 697    GLubyte LuminanceSize;
 698 };
 699
 700
 701 struct gl_minmax_attrib {
 702    GLenum Format;
 703    GLboolean Sink;
 704    GLfloat Min[4], Max[4];   /**< RGBA */
 705 };
 706
 707
 708 struct gl_convolution_attrib {
 709    GLenum Format;
 710    GLenum InternalFormat;
 711    GLuint Width;
 712    GLuint Height;
 713    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 714 };
 715
 716
 717 #define LIGHT_SPOT         0x1
 718 #define LIGHT_LOCAL_VIEWER 0x2
 719 #define LIGHT_POSITIONAL   0x4
 720 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 721
 722 /**
 723  * Lighting attributes.
 724  */
 725 struct gl_light_attrib {
 726    struct gl_light Light[MAX_LIGHTS];   /**< Array of lights */
 727    struct gl_lightmodel Model;          /**< Lighting model */
 728
 729    /**
 730     * Must flush FLUSH_VERTICES before referencing:
 731     */
 732    /*@{*/
 733    struct gl_material Material;         /**< Includes front & back values */
 734    /*@}*/
 735
 736    GLboolean Enabled;                   /**< Lighting enabled flag */
 737    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 738    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 739    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 740    GLuint ColorMaterialBitmask;         /**< bitmask formed from Face and Mode */
 741    GLboolean ColorMaterialEnabled;
 742
 743    struct gl_light EnabledList;         /**< List sentinel */
 744
 745    /**
 746     * Derived for optimizations:
 747     */
 748    /*@{*/
 749    GLboolean _NeedEyeCoords;
 750    GLboolean _NeedVertices;             /**< Use fast shader? */
 751    GLuint  _Flags;                      /**< LIGHT_* flags, see above */
 752    GLfloat _BaseColor[2][3];
 753    /*@}*/
 754 };
 755
 756
 757 /**
 758  * Line attributes.
 759  */
 760 struct gl_line_attrib {
 761    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 762    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 763    GLushort StipplePattern;     /**< Stipple pattern */
 764    GLint StippleFactor;         /**< Stipple repeat factor */
 765    GLfloat Width;               /**< Line width */
 766    GLfloat _Width;              /**< Clamped Line width */
 767 };
 768
 769
 770 struct gl_list_attrib {
 771    GLuint ListBase;
 772 };
 773
 774
 775 struct gl_list_instruction {
 776    GLuint Size;
 777    void (*Execute)( GLcontext *ctx, void *data );
 778    void (*Destroy)( GLcontext *ctx, void *data );
 779    void (*Print)( GLcontext *ctx, void *data );
 780 };
 781
 782 #define MAX_DLIST_EXT_OPCODES 16
 783
 784 struct gl_list_extensions {
 785    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 786    GLuint NumOpcodes;
 787 };
 788
 789
 790 struct gl_multisample_attrib {
 791    GLboolean Enabled;
 792    GLboolean SampleAlphaToCoverage;
 793    GLboolean SampleAlphaToOne;
 794    GLboolean SampleCoverage;
 795    GLfloat SampleCoverageValue;
 796    GLboolean SampleCoverageInvert;
 797 };
 798
 799
 800 /**
 801  * Pixel attributes.
 802  */
 803 struct gl_pixel_attrib {
 804    GLenum ReadBuffer;           /**< source buffer for glReadPixels()/glCopyPixels() */
 805    GLubyte _ReadSrcMask;        /**< Not really a mask, but like _DrawDestMask
 806                                   *
 807                                   * May be: FRONT_LEFT_BIT, BACK_LEFT_BIT,
 808                                   * FRONT_RIGHT_BIT or BACK_RIGHT_BIT. */
 809    GLfloat RedBias, RedScale;
 810    GLfloat GreenBias, GreenScale;
 811    GLfloat BlueBias, BlueScale;
 812    GLfloat AlphaBias, AlphaScale;
 813    GLfloat DepthBias, DepthScale;
 814    GLint IndexShift, IndexOffset;
 815    GLboolean MapColorFlag;
 816    GLboolean MapStencilFlag;
 817    GLfloat ZoomX, ZoomY;
 818    /* XXX move these out of gl_pixel_attrib */
 819    GLint MapStoSsize;           /**< Size of each pixel map */
 820    GLint MapItoIsize;
 821    GLint MapItoRsize;
 822    GLint MapItoGsize;
 823    GLint MapItoBsize;
 824    GLint MapItoAsize;
 825    GLint MapRtoRsize;
 826    GLint MapGtoGsize;
 827    GLint MapBtoBsize;
 828    GLint MapAtoAsize;
 829    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 830    GLint MapItoI[MAX_PIXEL_MAP_TABLE];
 831    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 832    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 833    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 834    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 835    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 836    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 837    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 838    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 839    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 840    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 841    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 842    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 843    /** GL_EXT_histogram */
 844    GLboolean HistogramEnabled;
 845    GLboolean MinMaxEnabled;
 846    /** GL_SGIS_pixel_texture */
 847    GLboolean PixelTextureEnabled;
 848    GLenum FragmentRgbSource;
 849    GLenum FragmentAlphaSource;
 850    /** GL_SGI_color_matrix */
 851    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 852    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 853    /** GL_SGI_color_table */
 854    GLfloat ColorTableScale[4];
 855    GLfloat ColorTableBias[4];
 856    GLboolean ColorTableEnabled;
 857    GLfloat PCCTscale[4];
 858    GLfloat PCCTbias[4];
 859    GLboolean PostConvolutionColorTableEnabled;
 860    GLfloat PCMCTscale[4];
 861    GLfloat PCMCTbias[4];
 862    GLboolean PostColorMatrixColorTableEnabled;
 863    /** GL_SGI_texture_color_table */
 864    GLfloat TextureColorTableScale[4];
 865    GLfloat TextureColorTableBias[4];
 866    /** Convolution */
 867    GLboolean Convolution1DEnabled;
 868    GLboolean Convolution2DEnabled;
 869    GLboolean Separable2DEnabled;
 870    GLfloat ConvolutionBorderColor[3][4];
 871    GLenum ConvolutionBorderMode[3];
 872    GLfloat ConvolutionFilterScale[3][4];
 873    GLfloat ConvolutionFilterBias[3][4];
 874    GLfloat PostConvolutionScale[4];  /**< RGBA */
 875    GLfloat PostConvolutionBias[4];   /**< RGBA */
 876 };
 877
 878
 879 /**
 880  * Point attributes.
 881  */
 882 struct gl_point_attrib {
 883    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 884    GLfloat Size;                /**< User-specified point size */
 885    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
 886    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 887    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 888    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 889    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 890    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
 891    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV_point_sprite / GL_NV_point_sprite */
 892    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 893 };
 894
 895
 896 /**
 897  * Polygon attributes.
 898  */
 899 struct gl_polygon_attrib {
 900    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
 901    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
 902    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
 903    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
 904    GLboolean CullFlag;          /**< Culling on/off flag */
 905    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
 906    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
 907    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
 908    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
 909    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
 910    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
 911    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
 912    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
 913 };
 914
 915
 916 /**
 917  * Scissor attributes.
 918  */
 919 struct gl_scissor_attrib {
 920    GLboolean Enabled;           /**< Scissor test enabled? */
 921    GLint X, Y;                  /**< Lower left corner of box */
 922    GLsizei Width, Height;       /**< Size of box */
 923 };
 924
 925
 926 /**
 927  * Stencil attributes.
 928  */
 929 struct gl_stencil_attrib {
 930    GLboolean Enabled;           /**< Enabled flag */
 931    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
 932    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
 933    GLenum Function[2];          /**< Stencil function */
 934    GLenum FailFunc[2];          /**< Fail function */
 935    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
 936    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
 937    GLstencil Ref[2];            /**< Reference value */
 938    GLstencil ValueMask[2];      /**< Value mask */
 939    GLstencil WriteMask[2];      /**< Write mask */
 940    GLstencil Clear;             /**< Clear value */
 941 };
 942
 943
 944 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
 945
 946 #define TEXTURE_1D_INDEX    0
 947 #define TEXTURE_2D_INDEX    1
 948 #define TEXTURE_3D_INDEX    2
 949 #define TEXTURE_CUBE_INDEX  3
 950 #define TEXTURE_RECT_INDEX  4
 951
 952 /* Texture.Unit[]._ReallyEnabled flags: */
 953 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
 954 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
 955 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
 956 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
 957 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
 958
 959
 960 /* TexGenEnabled flags */
 961 #define S_BIT 1
 962 #define T_BIT 2
 963 #define R_BIT 4
 964 #define Q_BIT 8
 965
 966 /* Bitmap versions of the GL_ constants. */
 967 #define TEXGEN_SPHERE_MAP        0x1
 968 #define TEXGEN_OBJ_LINEAR        0x2
 969 #define TEXGEN_EYE_LINEAR        0x4
 970 #define TEXGEN_REFLECTION_MAP_NV 0x8
 971 #define TEXGEN_NORMAL_MAP_NV     0x10
 972
 973 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
 974                                   TEXGEN_REFLECTION_MAP_NV | \
 975                                   TEXGEN_NORMAL_MAP_NV)
 976 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
 977                                   TEXGEN_REFLECTION_MAP_NV | \
 978                                   TEXGEN_NORMAL_MAP_NV     | \
 979                                   TEXGEN_EYE_LINEAR)
 980
 981 /* A selection of state flags to make driver and module's lives easier. */
 982 #define ENABLE_TEXGEN0        0x1
 983 #define ENABLE_TEXGEN1        0x2
 984 #define ENABLE_TEXGEN2        0x4
 985 #define ENABLE_TEXGEN3        0x8
 986 #define ENABLE_TEXGEN4        0x10
 987 #define ENABLE_TEXGEN5        0x20
 988 #define ENABLE_TEXGEN6        0x40
 989 #define ENABLE_TEXGEN7        0x80
 990
 991 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
 992 #define ENABLE_TEXMAT1        0x2
 993 #define ENABLE_TEXMAT2        0x4
 994 #define ENABLE_TEXMAT3        0x8
 995 #define ENABLE_TEXMAT4        0x10
 996 #define ENABLE_TEXMAT5        0x20
 997 #define ENABLE_TEXMAT6        0x40
 998 #define ENABLE_TEXMAT7        0x80
 999
1000 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1001 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1002
1003
1004 /**
1005  * Texel fetch function prototype.  We use texel fetch functions to
1006  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1007  * texture images.  These functions help to isolate us from the gritty
1008  * details of all the various texture image encodings.
1009  *
1010  * \param texImage texture image.
1011  * \param col texel column.
1012  * \param row texel row.
1013  * \param img texel image level/layer.
1014  * \param texelOut output texel (up to 4 GLchans)
1015  */
1016 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1017                                  GLint col, GLint row, GLint img,
1018                                  GLchan *texelOut );
1019
1020 /**
1021  * As above, but returns floats.
1022  * Used for depth component images and for upcoming signed/float
1023  * texture images.
1024  */
1025 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1026                                  GLint col, GLint row, GLint img,
1027                                  GLfloat *texelOut );
1028
1029
1030 /**
1031  * TexImage store function.  This is called by the glTex[Sub]Image
1032  * functions and is responsible for converting the user-specified texture
1033  * image into a specific (hardware) image format.
1034  */
1035 typedef GLboolean (*StoreTexImageFunc)(GLcontext *ctx, GLuint dims,
1036                           GLenum baseInternalFormat,
1037                           const struct gl_texture_format *dstFormat,
1038                           GLvoid *dstAddr,
1039                           GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
1040                           GLint dstRowStride, GLint dstImageStride,
1041                           GLint srcWidth, GLint srcHeight, GLint srcDepth,
1042                           GLenum srcFormat, GLenum srcType,
1043                           const GLvoid *srcAddr,
1044                           const struct gl_pixelstore_attrib *srcPacking);
1045
1046
1047
1048 /**
1049  * Texture format record
1050  */
1051 struct gl_texture_format {
1052    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1053
1054    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1055                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1056                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1057                                  *   GL_DEPTH_COMPONENT.
1058                                  */
1059    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1060    GLubyte RedBits;             /**< Bits per texel component */
1061    GLubyte GreenBits;           /**< These are just rough approximations for */
1062    GLubyte BlueBits;            /**< compressed texture formats. */
1063    GLubyte AlphaBits;
1064    GLubyte LuminanceBits;
1065    GLubyte IntensityBits;
1066    GLubyte IndexBits;
1067    GLubyte DepthBits;
1068
1069    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1070
1071    StoreTexImageFunc StoreImage;
1072
1073    /**
1074     * \name Texel fetch function pointers
1075     */
1076    /*@{*/
1077    FetchTexelFuncC FetchTexel1D;
1078    FetchTexelFuncC FetchTexel2D;
1079    FetchTexelFuncC FetchTexel3D;
1080    FetchTexelFuncF FetchTexel1Df;
1081    FetchTexelFuncF FetchTexel2Df;
1082    FetchTexelFuncF FetchTexel3Df;
1083    /*@}*/
1084 };
1085
1086
1087 /**
1088  * Texture image record
1089  */
1090 struct gl_texture_image {
1091    GLenum Format;               /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1092                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1093                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1094                                  *   GL_DEPTH_COMPONENT only.
1095                                  *   Used for choosing TexEnv arithmetic.
1096                                  */
1097    GLint IntFormat;             /**< Internal format as given by the user */
1098    GLuint Border;               /**< 0 or 1 */
1099    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1100    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1101    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1102    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1103    GLuint Width2;               /**< = Width - 2*Border */
1104    GLuint Height2;              /**< = Height - 2*Border */
1105    GLuint Depth2;               /**< = Depth - 2*Border */
1106    GLuint WidthLog2;            /**< = log2(Width2) */
1107    GLuint HeightLog2;           /**< = log2(Height2) */
1108    GLuint DepthLog2;            /**< = log2(Depth2) */
1109    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1110    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1111    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1112    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1113    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1114    GLboolean IsClientData;      /**< Data owned by client? */
1115    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1116
1117    const struct gl_texture_format *TexFormat;
1118
1119    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1120    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1121
1122    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1123    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1124
1125    /**
1126     * \name For device driver:
1127     */
1128    /*@{*/
1129    void *DriverData;            /**< Arbitrary device driver data */
1130    /*@}*/
1131 };
1132
1133 #define FACE_POS_X   0
1134 #define FACE_NEG_X   1
1135 #define FACE_POS_Y   2
1136 #define FACE_NEG_Y   3
1137 #define FACE_POS_Z   4
1138 #define FACE_NEG_Z   5
1139 #define MAX_FACES  6
1140
1141 /**
1142  * Texture object record
1143  */
1144 struct gl_texture_object {
1145    _glthread_Mutex Mutex;       /**< for thread safety */
1146    GLint RefCount;              /**< reference count */
1147    GLuint Name;                 /**< an unsigned integer */
1148    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1149    GLfloat Priority;            /**< in [0,1] */
1150    GLfloat BorderColor[4];      /**< unclamped */
1151    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1152    /** \name Wrap modes
1153     * Are GL_CLAMP, REPEAT, GL_CLAMP_TO_EDGE, and GL_CLAMP_TO_BORDER_ARB. */
1154    /*@{*/
1155    GLenum WrapS;
1156    GLenum WrapT;
1157    GLenum WrapR;
1158    /*@}*/
1159    GLenum MinFilter;            /**< minification filter */
1160    GLenum MagFilter;            /**< magnification filter */
1161    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1162    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1163    GLfloat LodBias;             /**< OpenGL 1.4 */
1164    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1165    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1166    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1167    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1168    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1169    GLfloat ShadowAmbient;
1170    GLenum CompareMode;          /**< GL_ARB_shadow */
1171    GLenum CompareFunc;          /**< GL_ARB_shadow */
1172    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1173    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1174    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1175    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1176    GLboolean _IsPowerOfTwo;     /**< Are all image dimensions powers of two? */
1177
1178    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1179
1180    /** GL_EXT_paletted_texture */
1181    struct gl_color_table Palette;
1182
1183    GLboolean Complete;                  /**< Is texture object complete? */
1184    struct gl_texture_object *Next;      /**< Next in linked list */
1185
1186    /**
1187     * \name For device driver
1188     */
1189    /*@{*/
1190    void *DriverData;    /**< Arbitrary device driver data */
1191    /*@}*/
1192 };
1193
1194 /**
1195  * Texture combine environment state.
1196  *
1197  * \todo
1198  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1199  * structure will need to be expanded for 4 elements.
1200  */
1201 struct gl_tex_env_combine_state {
1202    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1203    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1204    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1205    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1206    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1207    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1208    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1209    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1210    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1211    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1212 };
1213
1214 /**
1215  * Texture unit record
1216  */
1217 struct gl_texture_unit {
1218    GLuint Enabled;              /**< bitmask of TEXTURE_*_BIT flags */
1219    GLuint _ReallyEnabled;       /**< 0 or exactly one of TEXTURE_*_BIT flags */
1220
1221    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1222    GLfloat EnvColor[4];
1223    GLuint TexGenEnabled;        /**< Bitwise-OR of [STRQ]_BIT values */
1224    /** \name Tex coord generation mode
1225     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1226    /*@{*/
1227    GLenum GenModeS;
1228    GLenum GenModeT;
1229    GLenum GenModeR;
1230    GLenum GenModeQ;
1231    /*@}*/
1232    GLuint _GenBitS;
1233    GLuint _GenBitT;
1234    GLuint _GenBitR;
1235    GLuint _GenBitQ;
1236    GLuint _GenFlags;            /**< bitwise or of GenBit[STRQ] */
1237    GLfloat ObjectPlaneS[4];
1238    GLfloat ObjectPlaneT[4];
1239    GLfloat ObjectPlaneR[4];
1240    GLfloat ObjectPlaneQ[4];
1241    GLfloat EyePlaneS[4];
1242    GLfloat EyePlaneT[4];
1243    GLfloat EyePlaneR[4];
1244    GLfloat EyePlaneQ[4];
1245    GLfloat LodBias;             /**< for biasing mipmap levels */
1246
1247    /**
1248     * \name GL_EXT_texture_env_combine
1249     */
1250    struct gl_tex_env_combine_state Combine;
1251
1252    /**
1253     * Derived state based on \c EnvMode and the \c BaseFormat of the
1254     * currently enabled texture.
1255     */
1256    struct gl_tex_env_combine_state _EnvMode;
1257
1258    /**
1259     * Currently enabled combiner state.  This will point to either
1260     * \c Combine or \c _EnvMode.
1261     */
1262    struct gl_tex_env_combine_state *_CurrentCombine;
1263
1264    struct gl_texture_object *Current1D;
1265    struct gl_texture_object *Current2D;
1266    struct gl_texture_object *Current3D;
1267    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1268    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1269
1270    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1271
1272    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1273    struct gl_texture_object Saved2D;
1274    struct gl_texture_object Saved3D;
1275    struct gl_texture_object SavedCubeMap;
1276    struct gl_texture_object SavedRect;
1277
1278    /* GL_SGI_texture_color_table */
1279    struct gl_color_table ColorTable;
1280    struct gl_color_table ProxyColorTable;
1281    GLboolean ColorTableEnabled;
1282 };
1283
1284
1285 /**
1286  * Texture attributes
1287  */
1288 struct gl_texture_attrib {
1289    /**
1290     * name multitexture
1291     */
1292    /**@{*/
1293    GLuint CurrentUnit;          /**< Active texture unit */
1294    GLuint _EnabledUnits;        /**< one bit set for each really-enabled unit */
1295    GLuint _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1296    GLuint _GenFlags;            /**< for texgen */
1297    GLuint _TexGenEnabled;
1298    GLuint _TexMatEnabled;
1299    /**@}*/
1300
1301    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1302
1303    struct gl_texture_object *Proxy1D;
1304    struct gl_texture_object *Proxy2D;
1305    struct gl_texture_object *Proxy3D;
1306    struct gl_texture_object *ProxyCubeMap;
1307    struct gl_texture_object *ProxyRect;
1308
1309    /** GL_EXT_shared_texture_palette */
1310    GLboolean SharedPalette;
1311    struct gl_color_table Palette;
1312 };
1313
1314
1315 /**
1316  * Transformation attributes.
1317  */
1318 struct gl_transform_attrib {
1319    GLenum MatrixMode;                           /**< Matrix mode */
1320    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1321    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1322    GLuint ClipPlanesEnabled;                    /**< on/off bitmask */
1323    GLboolean Normalize;                         /**< Normalize all normals? */
1324    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1325    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1326 };
1327
1328
1329 /**
1330  * Viewport attributes.
1331  */
1332 struct gl_viewport_attrib {
1333    GLint X, Y;                  /**< position */
1334    GLsizei Width, Height;       /**< size */
1335    GLfloat Near, Far;           /**< Depth buffer range */
1336    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1337 };
1338
1339
1340 /**
1341  * Node for the attribute stack
1342  */
1343 struct gl_attrib_node {
1344    GLbitfield kind;
1345    void *data;
1346    struct gl_attrib_node *next;
1347 };
1348
1349
1350 /**
1351  * GL_ARB_vertex/pixel_buffer_object buffer object
1352  */
1353 struct gl_buffer_object {
1354    GLint RefCount;
1355    GLuint Name;
1356    GLenum Usage;
1357    GLenum Access;
1358    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1359    GLuint Size;              /**< Size of storage in bytes */
1360    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1361    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1362    GLboolean DeletePending;  /**< Deleted by user but RefCount > 0? */
1363 };
1364
1365
1366
1367 /**
1368  * Client pixel packing/unpacking attributes
1369  */
1370 struct gl_pixelstore_attrib {
1371    GLint Alignment;
1372    GLint RowLength;
1373    GLint SkipPixels;
1374    GLint SkipRows;
1375    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1376    GLint SkipImages;      /**< for GL_EXT_texture3D */
1377    GLboolean SwapBytes;
1378    GLboolean LsbFirst;
1379    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1380    GLboolean Invert;        /**< GL_MESA_pack_invert */
1381    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1382 };
1383
1384
1385 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1386
1387
1388 /**
1389  * Client vertex array attributes
1390  */
1391 struct gl_client_array {
1392    GLint Size;
1393    GLenum Type;
1394    GLsizei Stride;              /**< user-specified stride */
1395    GLsizei StrideB;             /**< actual stride in bytes */
1396    const GLubyte *Ptr;
1397    GLuint Enabled;              /**< one of the _NEW_ARRAY_ bits */
1398    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1399
1400    /**< GL_ARB_vertex_buffer_object */
1401    struct gl_buffer_object *BufferObj;
1402    GLuint _MaxElement;
1403
1404    GLuint Flags;
1405 };
1406
1407
1408 /**
1409  * Array attributes.
1410  */
1411 struct gl_array_attrib {
1412    struct gl_client_array Vertex;            /**< client data descriptors */
1413    struct gl_client_array Normal;
1414    struct gl_client_array Color;
1415    struct gl_client_array SecondaryColor;
1416    struct gl_client_array FogCoord;
1417    struct gl_client_array Index;
1418    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1419    struct gl_client_array EdgeFlag;
1420
1421    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1422
1423    GLint ActiveTexture;         /**< Client Active Texture */
1424    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1425    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1426
1427    GLuint _Enabled;             /**< _NEW_ARRAY_* - bit set if array enabled */
1428    GLuint NewState;             /**< _NEW_ARRAY_* */
1429
1430 #if FEATURE_ARB_vertex_buffer_object
1431    struct gl_buffer_object *NullBufferObj;
1432    struct gl_buffer_object *ArrayBufferObj;
1433    struct gl_buffer_object *ElementArrayBufferObj;
1434 #endif
1435    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1436 };
1437
1438
1439 struct gl_feedback {
1440    GLenum Type;
1441    GLuint _Mask;                /* FB_* bits */
1442    GLfloat *Buffer;
1443    GLuint BufferSize;
1444    GLuint Count;
1445 };
1446
1447
1448 /**
1449  * Selection attributes.
1450  */
1451 struct gl_selection {
1452    GLuint *Buffer;      /**< selection buffer */
1453    GLuint BufferSize;   /**< size of the selection buffer */
1454    GLuint BufferCount;  /**< number of values in the selection buffer */
1455    GLuint Hits;         /**< number of records in the selection buffer */
1456    GLuint NameStackDepth; /**< name stack depth */
1457    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1458    GLboolean HitFlag;   /**< hit flag */
1459    GLfloat HitMinZ;     /**< minimum hit depth */
1460    GLfloat HitMaxZ;     /**< maximum hit depth */
1461 };
1462
1463
1464 /**
1465  * 1-D Evaluator control points
1466  */
1467 struct gl_1d_map
1468 {
1469    GLuint Order;        /**< Number of control points */
1470    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1471    GLfloat *Points;     /**< Points to contiguous control points */
1472 };
1473
1474
1475 /**
1476  * 2-D Evaluator control points
1477  */
1478 struct gl_2d_map
1479 {
1480    GLuint Uorder;               /**< Number of control points in U dimension */
1481    GLuint Vorder;               /**< Number of control points in V dimension */
1482    GLfloat u1, u2, du;
1483    GLfloat v1, v2, dv;
1484    GLfloat *Points;             /**< Points to contiguous control points */
1485 };
1486
1487
1488 /**
1489  * All evaluator control points
1490  */
1491 struct gl_evaluators
1492 {
1493    /**
1494     * \name 1-D maps
1495     */
1496    /*@{*/
1497    struct gl_1d_map Map1Vertex3;
1498    struct gl_1d_map Map1Vertex4;
1499    struct gl_1d_map Map1Index;
1500    struct gl_1d_map Map1Color4;
1501    struct gl_1d_map Map1Normal;
1502    struct gl_1d_map Map1Texture1;
1503    struct gl_1d_map Map1Texture2;
1504    struct gl_1d_map Map1Texture3;
1505    struct gl_1d_map Map1Texture4;
1506    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1507    /*@}*/
1508
1509    /**
1510     * \name 2-D maps
1511     */
1512    /*@{*/
1513    struct gl_2d_map Map2Vertex3;
1514    struct gl_2d_map Map2Vertex4;
1515    struct gl_2d_map Map2Index;
1516    struct gl_2d_map Map2Color4;
1517    struct gl_2d_map Map2Normal;
1518    struct gl_2d_map Map2Texture1;
1519    struct gl_2d_map Map2Texture2;
1520    struct gl_2d_map Map2Texture3;
1521    struct gl_2d_map Map2Texture4;
1522    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1523    /*@}*/
1524 };
1525
1526
1527 /**
1528  * NV_fragment_program runtime state
1529  */
1530 struct fp_machine
1531 {
1532    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1533    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1534    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1535    GLuint CondCodes[4];
1536 };
1537
1538
1539 /**
1540  * Names of the various vertex/fragment register files
1541  */
1542 enum register_file
1543 {
1544    PROGRAM_TEMPORARY = 10,
1545    PROGRAM_INPUT,
1546    PROGRAM_OUTPUT,
1547    PROGRAM_LOCAL_PARAM,
1548    PROGRAM_ENV_PARAM,
1549    PROGRAM_NAMED_PARAM,
1550    PROGRAM_STATE_VAR,
1551    PROGRAM_WRITE_ONLY,
1552    PROGRAM_ADDRESS
1553 };
1554
1555
1556 /* Vertex and fragment instructions */
1557 struct vp_instruction;
1558 struct fp_instruction;
1559
1560 struct program_parameter_list;
1561
1562
1563 /**
1564  * Base class for any kind of program object
1565  */
1566 struct program
1567 {
1568    GLuint Id;
1569    GLubyte *String;    /* Null-terminated program text */
1570    GLenum Target;
1571    GLenum Format;      /* String encoding format */
1572    GLint RefCount;
1573    GLboolean Resident;
1574    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1575    GLuint NumInstructions;  /* GL_ARB_vertex/fragment_program */
1576    GLuint NumTemporaries;
1577    GLuint NumParameters;
1578    GLuint NumAttributes;
1579    GLuint NumAddressRegs;
1580 };
1581
1582
1583 /** Vertex program object */
1584 struct vertex_program
1585 {
1586    struct program Base;   /* base class */
1587    struct vp_instruction *Instructions;  /* Compiled instructions */
1588    GLboolean IsNVProgram; /* GL_NV_vertex_program ? */
1589    GLboolean IsPositionInvariant;  /* GL_NV_vertex_program1_1 */
1590    GLuint InputsRead;     /* Bitmask of which input regs are read */
1591    GLuint OutputsWritten; /* Bitmask of which output regs are written to */
1592    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1593 };
1594
1595
1596 /** Fragment program object */
1597 struct fragment_program
1598 {
1599    struct program Base;   /**< base class */
1600    struct fp_instruction *Instructions;  /**< Compiled instructions */
1601    GLuint InputsRead;     /**< Bitmask of which input regs are read */
1602    GLuint OutputsWritten; /**< Bitmask of which output regs are written to */
1603    GLuint TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_INDEX bitmask */
1604    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1605    GLuint NumTexInstructions;
1606    GLuint NumTexIndirections;
1607    GLenum FogOption;
1608    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1609
1610 #ifdef USE_TCC
1611    char c_str[4096];            /* experimental... */
1612    int c_strlen;
1613 #endif
1614 };
1615
1616
1617 /**
1618  * State common to vertex and fragment programs.
1619  */
1620 struct program_state {
1621    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_NV */
1622    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_NV */
1623 };
1624
1625
1626 /**
1627  * State vars for GL_NV_vertex_program
1628  */
1629 struct vertex_program_state
1630 {
1631    GLboolean Enabled;                  /**< GL_VERTEX_PROGRAM_NV */
1632    GLboolean _Enabled;                 /**< Really enabled? */
1633    GLboolean PointSizeEnabled;         /**< GL_VERTEX_PROGRAM_POINT_SIZE_NV */
1634    GLboolean TwoSideEnabled;           /**< GL_VERTEX_PROGRAM_TWO_SIDE_NV */
1635    struct vertex_program *Current;     /**< ptr to currently bound program */
1636
1637    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1638    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1639
1640    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1641    /* Only used during program execution (may be moved someday): */
1642    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1643    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1644    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1645    GLint AddressReg[4];
1646
1647 #if FEATURE_MESA_program_debug
1648    GLprogramcallbackMESA Callback;
1649    GLvoid *CallbackData;
1650    GLboolean CallbackEnabled;
1651    GLuint CurrentPosition;
1652 #endif
1653 };
1654
1655
1656 /*
1657  * State for GL_ARB/NV_fragment_program
1658  */
1659 struct fragment_program_state
1660 {
1661    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1662    GLboolean _Enabled;                   /* Really enabled? */
1663    struct fragment_program *Current;     /* ptr to currently bound program */
1664    struct fp_machine Machine;            /* machine state */
1665    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1666
1667 #if FEATURE_MESA_program_debug
1668    GLprogramcallbackMESA Callback;
1669    GLvoid *CallbackData;
1670    GLboolean CallbackEnabled;
1671    GLuint CurrentPosition;
1672 #endif
1673 };
1674
1675
1676 /*
1677  * State for GL_ARB_occlusion_query
1678  */
1679 struct occlusion_state
1680 {
1681    GLboolean Active;
1682    GLuint CurrentQueryObject;
1683    GLuint PassedCounter;
1684    struct _mesa_HashTable *QueryObjects;
1685 };
1686
1687
1688 /**
1689  * State which can be shared by multiple contexts:
1690  */
1691 struct gl_shared_state
1692 {
1693    _glthread_Mutex Mutex;                  /**< for thread safety */
1694    GLint RefCount;                         /**< Reference count */
1695    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
1696    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
1697    struct gl_texture_object *TexObjectList;/**< Linked list of texture objects */
1698
1699    /**
1700     * \name Default texture objects (shared by all multi-texture units)
1701     */
1702    /*@{*/
1703    struct gl_texture_object *Default1D;
1704    struct gl_texture_object *Default2D;
1705    struct gl_texture_object *Default3D;
1706    struct gl_texture_object *DefaultCubeMap;
1707    struct gl_texture_object *DefaultRect;
1708    /*@}*/
1709
1710    /**
1711     * \name GL_NV_vertex/_program
1712     */
1713    /*@{*/
1714    struct _mesa_HashTable *Programs;
1715 #if FEATURE_ARB_vertex_program
1716    struct program *DefaultVertexProgram;
1717 #endif
1718 #if FEATURE_ARB_fragment_program
1719    struct program *DefaultFragmentProgram;
1720 #endif
1721    /*@}*/
1722
1723 #if FEATURE_ARB_vertex_buffer_object
1724    struct _mesa_HashTable *BufferObjects;
1725 #endif
1726
1727    void *DriverData;  /**< Device driver shared state */
1728 };
1729
1730
1731 /**
1732  * Frame buffer.
1733  *
1734  * A "frame buffer" is a color buffer and its optional ancillary buffers:
1735  * depth, accum, stencil, and software-simulated alpha buffers.
1736  * In C++ terms, think of this as a base class from which device drivers
1737  * will make derived classes.
1738  */
1739 struct gl_frame_buffer
1740 {
1741    GLvisual Visual;             /**< The corresponding visual */
1742
1743    GLuint Width, Height;        /**< size of frame buffer in pixels */
1744
1745    GLboolean UseSoftwareDepthBuffer;
1746    GLboolean UseSoftwareAccumBuffer;
1747    GLboolean UseSoftwareStencilBuffer;
1748    GLboolean UseSoftwareAlphaBuffers;
1749    GLboolean UseSoftwareAuxBuffers;
1750
1751    /** \name Software depth (aka Z) buffer */
1752    /*@{*/
1753    GLvoid *DepthBuffer;         /**< array [Width*Height] of GLushort or GLuint*/
1754    /*@}*/
1755
1756    /** \name Software stencil buffer */
1757    /*@{*/
1758    GLstencil *Stencil;          /**< array [Width*Height] of GLstencil values */
1759    /*@}*/
1760
1761    /** \name Software accumulation buffer */
1762    /*@{*/
1763    GLaccum *Accum;              /**< array [4*Width*Height] of GLaccum values */
1764    /*@}*/
1765
1766    /** \name Software alpha planes */
1767    /*@{*/
1768    GLchan *FrontLeftAlpha;      /**< array [Width*Height] of GLchan */
1769    GLchan *BackLeftAlpha;       /**< array [Width*Height] of GLchan */
1770    GLchan *FrontRightAlpha;     /**< array [Width*Height] of GLchan */
1771    GLchan *BackRightAlpha;      /**< array [Width*Height] of GLchan */
1772    /*@}*/
1773
1774    GLchan *AuxBuffers[MAX_AUX_BUFFERS];
1775
1776    /**
1777     * \name Drawing bounds
1778     *
1779     * Intersection of window size and scissor box
1780     */
1781    /*@{*/
1782    GLint _Xmin;  /**< inclusive */
1783    GLint _Ymin;  /**< inclusive */
1784    GLint _Xmax;  /**< exclusive */
1785    GLint _Ymax;  /**< exclusive */
1786    /*@}*/
1787 };
1788
1789
1790 /**
1791  * Constants which may be overridden by device driver during context creation
1792  * but are never changed after that.
1793  */
1794 struct gl_constants
1795 {
1796    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
1797    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
1798    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
1799    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
1800    GLuint MaxTextureCoordUnits;
1801    GLuint MaxTextureImageUnits;
1802    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
1803    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
1804    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
1805    GLuint MaxArrayLockSize;
1806    GLint SubPixelBits;
1807    GLfloat MinPointSize, MaxPointSize;          /* aliased */
1808    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
1809    GLfloat PointSizeGranularity;
1810    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
1811    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
1812    GLfloat LineWidthGranularity;
1813    GLuint MaxColorTableSize;
1814    GLuint MaxConvolutionWidth;
1815    GLuint MaxConvolutionHeight;
1816    GLuint MaxClipPlanes;
1817    GLuint MaxLights;
1818    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
1819    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
1820    /* GL_ARB_vertex_program */
1821    GLuint MaxVertexProgramInstructions;
1822    GLuint MaxVertexProgramAttribs;
1823    GLuint MaxVertexProgramTemps;
1824    GLuint MaxVertexProgramLocalParams;
1825    GLuint MaxVertexProgramEnvParams;
1826    GLuint MaxVertexProgramAddressRegs;
1827    /* GL_ARB_fragment_program */
1828    GLuint MaxFragmentProgramInstructions;
1829    GLuint MaxFragmentProgramAttribs;
1830    GLuint MaxFragmentProgramTemps;
1831    GLuint MaxFragmentProgramLocalParams;
1832    GLuint MaxFragmentProgramEnvParams;
1833    GLuint MaxFragmentProgramAddressRegs;
1834    GLuint MaxFragmentProgramAluInstructions;
1835    GLuint MaxFragmentProgramTexInstructions;
1836    GLuint MaxFragmentProgramTexIndirections;
1837    /* vertex or fragment program */
1838    GLuint MaxProgramMatrices;
1839    GLuint MaxProgramMatrixStackDepth;
1840    /* vertex array / buffer object bounds checking */
1841    GLboolean CheckArrayBounds;
1842 };
1843
1844
1845 /**
1846  * List of extensions.
1847  */
1848 struct gl_extensions
1849 {
1850    /**
1851     * \name Flags to quickly test if certain extensions are available.
1852     *
1853     * Not every extension needs to have such a flag, but it's encouraged.
1854     */
1855    /*@{*/
1856    GLboolean dummy;  /* don't remove this! */
1857    GLboolean ARB_depth_texture;
1858    GLboolean ARB_fragment_program;
1859    GLboolean ARB_half_float_pixel;
1860    GLboolean ARB_imaging;
1861    GLboolean ARB_multisample;
1862    GLboolean ARB_multitexture;
1863    GLboolean ARB_occlusion_query;
1864    GLboolean ARB_point_sprite;
1865    GLboolean ARB_shadow;
1866    GLboolean ARB_texture_border_clamp;
1867    GLboolean ARB_texture_compression;
1868    GLboolean ARB_texture_cube_map;
1869    GLboolean ARB_texture_env_combine;
1870    GLboolean ARB_texture_env_crossbar;
1871    GLboolean ARB_texture_env_dot3;
1872    GLboolean ARB_texture_float;
1873    GLboolean ARB_texture_mirrored_repeat;
1874    GLboolean ARB_texture_non_power_of_two;
1875    GLboolean ARB_transpose_matrix;
1876    GLboolean ARB_vertex_buffer_object;
1877    GLboolean ARB_vertex_program;
1878    GLboolean ARB_window_pos;
1879    GLboolean EXT_abgr;
1880    GLboolean EXT_bgra;
1881    GLboolean EXT_blend_color;
1882    GLboolean EXT_blend_equation_separate;
1883    GLboolean EXT_blend_func_separate;
1884    GLboolean EXT_blend_logic_op;
1885    GLboolean EXT_blend_minmax;
1886    GLboolean EXT_blend_subtract;
1887    GLboolean EXT_clip_volume_hint;
1888    GLboolean EXT_convolution;
1889    GLboolean EXT_compiled_vertex_array;
1890    GLboolean EXT_copy_texture;
1891    GLboolean EXT_depth_bounds_test;
1892    GLboolean EXT_draw_range_elements;
1893    GLboolean EXT_fog_coord;
1894    GLboolean EXT_histogram;
1895    GLboolean EXT_multi_draw_arrays;
1896    GLboolean EXT_paletted_texture;
1897    GLboolean EXT_packed_pixels;
1898    GLboolean EXT_pixel_buffer_object;
1899    GLboolean EXT_point_parameters;
1900    GLboolean EXT_polygon_offset;
1901    GLboolean EXT_rescale_normal;
1902    GLboolean EXT_shadow_funcs;
1903    GLboolean EXT_secondary_color;
1904    GLboolean EXT_separate_specular_color;
1905    GLboolean EXT_shared_texture_palette;
1906    GLboolean EXT_stencil_wrap;
1907    GLboolean EXT_stencil_two_side;
1908    GLboolean EXT_subtexture;
1909    GLboolean EXT_texture;
1910    GLboolean EXT_texture_object;
1911    GLboolean EXT_texture3D;
1912    GLboolean EXT_texture_compression_s3tc;
1913    GLboolean EXT_texture_env_add;
1914    GLboolean EXT_texture_env_combine;
1915    GLboolean EXT_texture_env_dot3;
1916    GLboolean EXT_texture_filter_anisotropic;
1917    GLboolean EXT_texture_lod_bias;
1918    GLboolean EXT_texture_mirror_clamp;
1919    GLboolean EXT_vertex_array;
1920    GLboolean EXT_vertex_array_set;
1921    /* vendor extensions */
1922    GLboolean APPLE_client_storage;
1923    GLboolean APPLE_packed_pixels;
1924    GLboolean ATI_texture_mirror_once;
1925    GLboolean ATI_texture_env_combine3;
1926    GLboolean HP_occlusion_test;
1927    GLboolean IBM_rasterpos_clip;
1928    GLboolean IBM_multimode_draw_arrays;
1929    GLboolean MESA_pack_invert;
1930    GLboolean MESA_packed_depth_stencil;
1931    GLboolean MESA_program_debug;
1932    GLboolean MESA_resize_buffers;
1933    GLboolean MESA_ycbcr_texture;
1934    GLboolean NV_blend_square;
1935    GLboolean NV_fragment_program;
1936    GLboolean NV_light_max_exponent;
1937    GLboolean NV_point_sprite;
1938    GLboolean NV_texgen_reflection;
1939    GLboolean NV_texture_rectangle;
1940    GLboolean NV_vertex_program;
1941    GLboolean NV_vertex_program1_1;
1942    GLboolean SGI_color_matrix;
1943    GLboolean SGI_color_table;
1944    GLboolean SGI_texture_color_table;
1945    GLboolean SGIS_generate_mipmap;
1946    GLboolean SGIS_pixel_texture;
1947    GLboolean SGIS_texture_edge_clamp;
1948    GLboolean SGIS_texture_lod;
1949    GLboolean SGIX_depth_texture;
1950    GLboolean SGIX_pixel_texture;
1951    GLboolean SGIX_shadow;
1952    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
1953    GLboolean TDFX_texture_compression_FXT1;
1954    GLboolean S3_s3tc;
1955    /*@}*/
1956    /* The extension string */
1957    const GLubyte *String;
1958 };
1959
1960
1961 /**
1962  * A stack of matrices (projection, modelview, color, texture, etc).
1963  */
1964 struct matrix_stack
1965 {
1966    GLmatrix *Top;      /**< points into Stack */
1967    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
1968    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
1969    GLuint MaxDepth;    /**< size of Stack[] array */
1970    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
1971 };
1972
1973
1974 /**
1975  * \name Bits for image transfer operations
1976  *
1977  * \sa __GLcontextRec::ImageTransferState.
1978  */
1979 /*@{*/
1980 #define IMAGE_SCALE_BIAS_BIT                      0x1
1981 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
1982 #define IMAGE_MAP_COLOR_BIT                       0x4
1983 #define IMAGE_COLOR_TABLE_BIT                     0x8
1984 #define IMAGE_CONVOLUTION_BIT                     0x10
1985 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
1986 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
1987 #define IMAGE_COLOR_MATRIX_BIT                    0x80
1988 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
1989 #define IMAGE_HISTOGRAM_BIT                       0x200
1990 #define IMAGE_MIN_MAX_BIT                         0x400
1991 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
1992
1993
1994 /** Transfer ops up to convolution */
1995 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
1996                                     IMAGE_SHIFT_OFFSET_BIT |   \
1997                                     IMAGE_MAP_COLOR_BIT |      \
1998                                     IMAGE_COLOR_TABLE_BIT)
1999
2000 /** Transfer ops after convolution */
2001 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2002                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2003                                      IMAGE_COLOR_MATRIX_BIT |                 \
2004                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2005                                      IMAGE_HISTOGRAM_BIT |                    \
2006                                      IMAGE_MIN_MAX_BIT)
2007 /*@}*/
2008
2009
2010 /**
2011  * \name Bits to indicate what state has changed.
2012  *
2013  * 4 unused flags.
2014  */
2015 /*@{*/
2016 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2017 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2018 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2019 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2020 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2021 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2022 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2023 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2024 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2025 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2026 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2027 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2028 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2029 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2030 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2031 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2032 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2033 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2034 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2035 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2036 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2037 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2038 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2039 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2040 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2041 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2042 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2043 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2044 #define _NEW_ALL ~0
2045 /*@}*/
2046
2047
2048 /**
2049  * \name Bits to track array state changes
2050  *
2051  * Also used to summarize array enabled.
2052  */
2053 /*@{*/
2054 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2055 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2056 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2057 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2058 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2059 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2060 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
2061 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
2062 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2063 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2064 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2065 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2066 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2067 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2068 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2069 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2070 #define _NEW_ARRAY_ATTRIB_0         0x10000  /* start at bit 16 */
2071 #define _NEW_ARRAY_ALL              0xffffffff
2072
2073
2074 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2075 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2076 /*@}*/
2077
2078
2079 /**
2080  * \name A bunch of flags that we think might be useful to drivers.
2081  *
2082  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2083  */
2084 /*@{*/
2085 #define DD_FLATSHADE                0x1
2086 #define DD_SEPARATE_SPECULAR        0x2
2087 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2088 #define DD_TRI_LIGHT_TWOSIDE        0x8
2089 #define DD_TRI_UNFILLED             0x10
2090 #define DD_TRI_SMOOTH               0x20
2091 #define DD_TRI_STIPPLE              0x40
2092 #define DD_TRI_OFFSET               0x80
2093 #define DD_LINE_SMOOTH              0x100
2094 #define DD_LINE_STIPPLE             0x200
2095 #define DD_LINE_WIDTH               0x400
2096 #define DD_POINT_SMOOTH             0x800
2097 #define DD_POINT_SIZE               0x1000
2098 #define DD_POINT_ATTEN              0x2000
2099 /*@}*/
2100
2101
2102 /**
2103  * \name Define the state changes under which each of these bits might change
2104  */
2105 /*@{*/
2106 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2107 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2108 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2109 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2110 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2111 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2112 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2113 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2114 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2115 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2116 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2117 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2118 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2119 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2120 /*@}*/
2121
2122
2123 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2124                                            _NEW_TEXTURE |       \
2125                                            _NEW_POINT |         \
2126                                            _NEW_MODELVIEW)
2127
2128 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2129                                            _NEW_TEXTURE)
2130
2131 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2132
2133
2134
2135
2136 /*
2137  * Forward declaration of display list data types:
2138  */
2139 union node;
2140 typedef union node Node;
2141
2142
2143 /* This has to be included here. */
2144 #include "dd.h"
2145
2146
2147 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2148
2149 /**
2150  * Core Mesa's support for tnl modules:
2151  */
2152 struct gl_tnl_module {
2153    /**
2154     * Vertex format to be lazily swapped into current dispatch.
2155     */
2156    const GLvertexformat *Current;
2157
2158    /**
2159     * \name Record of functions swapped out.
2160     * On restore, only need to swap these functions back in.
2161     */
2162    /*@{*/
2163    void *Swapped[NUM_VERTEX_FORMAT_ENTRIES][2];
2164    GLuint SwapCount;
2165    /*@}*/
2166 };
2167
2168 struct mesa_list_state {
2169    GLuint CallDepth;            /**< Current recursion calling depth */
2170    Node *CurrentListPtr;        /**< Head of list being compiled */
2171    GLuint CurrentListNum;       /**< Number of the list being compiled */
2172    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2173    GLuint CurrentPos;           /**< Index into current block of nodes */
2174    GLvertexformat ListVtxfmt;
2175
2176    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2177    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2178
2179    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2180    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2181
2182    GLubyte ActiveIndex;
2183    GLfloat CurrentIndex;
2184
2185    GLubyte ActiveEdgeFlag;
2186    GLboolean CurrentEdgeFlag;
2187 };
2188
2189
2190 /**
2191  * Mesa context
2192  *
2193  * This is the central context data structure for Mesa.  Almost all
2194  * OpenGL state is contained in this structure.
2195  * Think of this as a base class from which device drivers will derive
2196  * sub classes.
2197  */
2198 struct __GLcontextRec {
2199    /**
2200     * \name OS related interfaces.
2201     *
2202     * These \b must be the first members of this structure, because they are
2203     * exposed to the outside world (i.e. GLX extension).
2204     */
2205    /*@{*/
2206    __GLimports imports;
2207    __GLexports exports;
2208    /*@}*/
2209
2210    /** State possibly shared with other contexts in the address space */
2211    struct gl_shared_state *Shared;
2212
2213    /** \name API function pointer tables */
2214    /*@{*/
2215    struct _glapi_table *Save;   /**< Display list save functions */
2216    struct _glapi_table *Exec;   /**< Execute functions */
2217    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2218    /*@}*/
2219
2220    GLvisual Visual;
2221    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2222    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2223
2224    /**
2225     * Device driver function pointer table
2226     */
2227    struct dd_function_table Driver;
2228
2229    void *DriverCtx;     /**< Points to device driver context/state */
2230    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2231
2232    /** Core/Driver constants */
2233    struct gl_constants Const;
2234
2235    /** \name The various 4x4 matrix stacks */
2236    /*@{*/
2237    struct matrix_stack ModelviewMatrixStack;
2238    struct matrix_stack ProjectionMatrixStack;
2239    struct matrix_stack ColorMatrixStack;
2240    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2241    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2242    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2243    /*@}*/
2244
2245    /** Combined modelview and projection matrix */
2246    GLmatrix _ModelProjectMatrix;
2247
2248    /** \name Display lists */
2249    struct mesa_list_state ListState;
2250
2251    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2252    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2253
2254    /** Extensions */
2255    struct gl_extensions Extensions;
2256
2257    /** \name Renderer attribute stack */
2258    /*@{*/
2259    GLuint AttribStackDepth;
2260    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2261    /*@}*/
2262
2263    /** \name Renderer attribute groups
2264     *
2265     * We define a struct for each attribute group to make pushing and popping
2266     * attributes easy.  Also it's a good organization.
2267     */
2268    /*@{*/
2269    struct gl_accum_attrib       Accum;          /**< Accumulation buffer attributes */
2270    struct gl_colorbuffer_attrib Color;          /**< Color buffers attributes */
2271    struct gl_current_attrib     Current;        /**< Current attributes */
2272    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2273    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2274    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2275    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2276    struct gl_light_attrib       Light;          /**< Light attributes */
2277    struct gl_line_attrib        Line;           /**< Line attributes */
2278    struct gl_list_attrib        List;           /**< List attributes */
2279    struct gl_multisample_attrib Multisample;
2280    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2281    struct gl_point_attrib       Point;          /**< Point attributes */
2282    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2283    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2284    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2285    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2286    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2287    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2288    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2289    /*@}*/
2290
2291    /** \name Other attribute groups */
2292    /*@{*/
2293    struct gl_histogram_attrib   Histogram;
2294    struct gl_minmax_attrib      MinMax;
2295    struct gl_convolution_attrib Convolution1D;
2296    struct gl_convolution_attrib Convolution2D;
2297    struct gl_convolution_attrib Separable2D;
2298    /*@}*/
2299
2300    /** \name Client attribute stack */
2301    /*@{*/
2302    GLuint ClientAttribStackDepth;
2303    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2304    /*@}*/
2305
2306    /** \name Client attribute groups */
2307    /*@{*/
2308    struct gl_array_attrib       Array;  /**< Vertex arrays */
2309    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2310    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2311    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2312
2313    struct gl_evaluators EvalMap;   /**< All evaluators */
2314    struct gl_feedback   Feedback;  /**< Feedback */
2315    struct gl_selection  Select;    /**< Selection */
2316
2317    struct gl_color_table ColorTable;       /**< Pre-convolution */
2318    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2319    struct gl_color_table PostConvolutionColorTable;
2320    struct gl_color_table ProxyPostConvolutionColorTable;
2321    struct gl_color_table PostColorMatrixColorTable;
2322    struct gl_color_table ProxyPostColorMatrixColorTable;
2323
2324    struct program_state Program;             /**< for vertex or fragment progs */
2325    struct vertex_program_state VertexProgram;      /**< GL_NV_vertex_program */
2326    struct fragment_program_state FragmentProgram;  /**< GL_NV_fragment_program */
2327
2328    struct occlusion_state Occlusion;  /**< GL_ARB_occlusion_query */
2329
2330    GLenum ErrorValue;        /**< Last error code */
2331    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2332    GLuint NewState;          /**< bitwise-or of _NEW_* flags */
2333    /*@}*/
2334
2335    /** \name Derived */
2336    /*@{*/
2337    GLuint _TriangleCaps;      /**< bitwise-or of DD_* flags */
2338    GLuint _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2339    GLfloat _EyeZDir[3];
2340    GLfloat _ModelViewInvScale;
2341    GLuint _NeedEyeCoords;
2342    GLuint _ForceEyeCoords;
2343    GLboolean _RotateMode;
2344    GLenum _CurrentProgram;    /* currently executing program */
2345
2346    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2347    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2348    /**@}*/
2349
2350    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2351
2352
2353    GLboolean OcclusionResult;       /**< for GL_HP_occlusion_test */
2354    GLboolean OcclusionResultSaved;  /**< for GL_HP_occlusion_test */
2355    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2356                     *
2357                     * We don't have a better way to communicate this value from
2358                     * swrast_setup to swrast. */
2359
2360
2361    /** \name Z buffer stuff */
2362    /*@{*/
2363    GLuint DepthMax;     /**< Max depth buffer value */
2364    GLfloat DepthMaxF;   /**< Float max depth buffer value */
2365    GLfloat MRD;         /**< minimum resolvable difference in Z values */
2366    /*@}*/
2367
2368    /** \name Color clamping (tentative part of GL_ARB_color_clamp_control) */
2369    /*@{*/
2370    GLboolean ClampFragmentColors;
2371    GLboolean ClampVertexColors;
2372    /*@}*/
2373
2374    /** Should 3Dfx Glide driver catch signals? */
2375    GLboolean CatchSignals;
2376
2377    /** \name For debugging/development only */
2378    /*@{*/
2379    GLboolean FirstTimeCurrent;
2380    /*@}*/
2381
2382    /** Dither disable via MESA_NO_DITHER env var */
2383    GLboolean NoDither;
2384
2385    /** Core tnl module support */
2386    struct gl_tnl_module TnlModule;
2387
2388    /**
2389     * \name Hooks for module contexts.
2390     *
2391     * These will eventually live in the driver or elsewhere.
2392     */
2393    /*@{*/
2394    void *swrast_context;
2395    void *swsetup_context;
2396    void *swtnl_context;
2397    void *swtnl_im;
2398    void *acache_context;
2399    void *aelt_context;
2400    /*@}*/
2401 };
2402
2403
2404 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2405 extern const char *_mesa_prim_name[GL_POLYGON+4];
2406
2407
2408 #ifdef MESA_DEBUG
2409 extern int MESA_VERBOSE;
2410 extern int MESA_DEBUG_FLAGS;
2411 # define MESA_FUNCTION __FUNCTION__
2412 #else
2413 # define MESA_VERBOSE 0
2414 # define MESA_DEBUG_FLAGS 0
2415 # define MESA_FUNCTION "a function"
2416 # ifndef NDEBUG
2417 #  define NDEBUG
2418 # endif
2419 #endif
2420
2421
2422 enum _verbose {
2423    VERBOSE_VARRAY               = 0x0001,
2424    VERBOSE_TEXTURE              = 0x0002,
2425    VERBOSE_IMMEDIATE            = 0x0004,
2426    VERBOSE_PIPELINE             = 0x0008,
2427    VERBOSE_DRIVER               = 0x0010,
2428    VERBOSE_STATE                = 0x0020,
2429    VERBOSE_API                  = 0x0040,
2430    VERBOSE_DISPLAY_LIST         = 0x0100,
2431    VERBOSE_LIGHTING             = 0x0200,
2432    VERBOSE_PRIMS                = 0x0400,
2433    VERBOSE_VERTS                = 0x0800
2434 };
2435
2436
2437 enum _debug {
2438    DEBUG_ALWAYS_FLUSH           = 0x1
2439 };
2440
2441
2442
2443 #define Elements(x) sizeof(x)/sizeof(*(x))
2444
2445
2446 #endif /* TYPES_H */