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:  6.3
  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  * Indexes for vertex program attributes.
 154  * GL_NV_vertex_program aliases generic attributes over the conventional
 155  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 156  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 157  * generic attributes are distinct/separate).
 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_GENERIC0 = 16,
 177    VERT_ATTRIB_GENERIC1 = 17,
 178    VERT_ATTRIB_GENERIC2 = 18,
 179    VERT_ATTRIB_GENERIC3 = 19,
 180    VERT_ATTRIB_MAX = 16
 181 };
 182
 183 /**
 184  * Bitflags for vertex attributes.
 185  * These are used in bitfields in many places.
 186  */
 187 /*@{*/
 188 #define VERT_BIT_POS      (1 << VERT_ATTRIB_POS)
 189 #define VERT_BIT_WEIGHT   (1 << VERT_ATTRIB_WEIGHT)
 190 #define VERT_BIT_NORMAL   (1 << VERT_ATTRIB_NORMAL)
 191 #define VERT_BIT_COLOR0   (1 << VERT_ATTRIB_COLOR0)
 192 #define VERT_BIT_COLOR1   (1 << VERT_ATTRIB_COLOR1)
 193 #define VERT_BIT_FOG      (1 << VERT_ATTRIB_FOG)
 194 #define VERT_BIT_SIX      (1 << VERT_ATTRIB_SIX)
 195 #define VERT_BIT_SEVEN    (1 << VERT_ATTRIB_SEVEN)
 196 #define VERT_BIT_TEX0     (1 << VERT_ATTRIB_TEX0)
 197 #define VERT_BIT_TEX1     (1 << VERT_ATTRIB_TEX1)
 198 #define VERT_BIT_TEX2     (1 << VERT_ATTRIB_TEX2)
 199 #define VERT_BIT_TEX3     (1 << VERT_ATTRIB_TEX3)
 200 #define VERT_BIT_TEX4     (1 << VERT_ATTRIB_TEX4)
 201 #define VERT_BIT_TEX5     (1 << VERT_ATTRIB_TEX5)
 202 #define VERT_BIT_TEX6     (1 << VERT_ATTRIB_TEX6)
 203 #define VERT_BIT_TEX7     (1 << VERT_ATTRIB_TEX7)
 204 #define VERT_BIT_GENERIC0 (1 << VERT_ATTRIB_GENERIC0)
 205 #define VERT_BIT_GENERIC1 (1 << VERT_ATTRIB_GENERIC1)
 206 #define VERT_BIT_GENERIC2 (1 << VERT_ATTRIB_GENERIC2)
 207 #define VERT_BIT_GENERIC3 (1 << VERT_ATTRIB_GENERIC3)
 208
 209 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 210 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 211 /*@}*/
 212
 213
 214 /**
 215  * Indexes for fragment program input attributes.
 216  */
 217 enum {
 218    FRAG_ATTRIB_WPOS = 0,
 219    FRAG_ATTRIB_COL0 = 1,
 220    FRAG_ATTRIB_COL1 = 2,
 221    FRAG_ATTRIB_FOGC = 3,
 222    FRAG_ATTRIB_TEX0 = 4,
 223    FRAG_ATTRIB_TEX1 = 5,
 224    FRAG_ATTRIB_TEX2 = 6,
 225    FRAG_ATTRIB_TEX3 = 7,
 226    FRAG_ATTRIB_TEX4 = 8,
 227    FRAG_ATTRIB_TEX5 = 9,
 228    FRAG_ATTRIB_TEX6 = 10,
 229    FRAG_ATTRIB_TEX7 = 11
 230 };
 231
 232 /*
 233  * Bitflags for fragment attributes.
 234  */
 235 /*@{*/
 236 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 237 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 238 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 239 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 240 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 241 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 242 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 243 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 244 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 245 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 246 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 247 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 248
 249 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 250                            FRAG_BIT_TEX1|       \
 251                            FRAG_BIT_TEX2|       \
 252                            FRAG_BIT_TEX3|       \
 253                            FRAG_BIT_TEX4|       \
 254                            FRAG_BIT_TEX5|       \
 255                            FRAG_BIT_TEX6|       \
 256                            FRAG_BIT_TEX7)
 257 /*@}*/
 258
 259
 260 /**
 261  * Bits for each basic buffer in a complete framebuffer.
 262  * When glDrawBuffer(GL_FRONT_AND_BACK) is called (non-stereo),
 263  * _DrawDestMask will be set to (DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT),
 264  * for example.  Also passed to ctx->Driver.Clear() to indicate which
 265  * buffers to clear.
 266  */
 267 /*@{*/
 268 #define DD_FRONT_LEFT_BIT  0x1
 269 #define DD_FRONT_RIGHT_BIT 0x2
 270 #define DD_BACK_LEFT_BIT   0x4
 271 #define DD_BACK_RIGHT_BIT  0x8
 272 #define DD_AUX0_BIT        0x10
 273 #define DD_AUX1_BIT        0x20
 274 #define DD_AUX2_BIT        0x40
 275 #define DD_AUX3_BIT        0x80
 276 #define DD_DEPTH_BIT       GL_DEPTH_BUFFER_BIT    /* 0x00000100 */
 277 #define DD_ACCUM_BIT       GL_ACCUM_BUFFER_BIT    /* 0x00000200 */
 278 #define DD_STENCIL_BIT     GL_STENCIL_BUFFER_BIT  /* 0x00000400 */
 279 /*@}*/
 280
 281
 282 /**
 283  * Data structure for color tables
 284  */
 285 struct gl_color_table {
 286    GLenum Format;         /**< GL_ALPHA, GL_RGB, GL_RGB, etc */
 287    GLenum IntFormat;
 288    GLuint Size;           /**< number of entries (rows) in table */
 289    GLvoid *Table;         /**< points to data of <Type> */
 290    GLenum Type;           /**< GL_UNSIGNED_BYTE or GL_FLOAT */
 291    GLubyte RedSize;
 292    GLubyte GreenSize;
 293    GLubyte BlueSize;
 294    GLubyte AlphaSize;
 295    GLubyte LuminanceSize;
 296    GLubyte IntensitySize;
 297 };
 298
 299
 300 /**
 301  * \name Bit flags used for updating material values.
 302  */
 303 /*@{*/
 304 #define MAT_ATTRIB_FRONT_AMBIENT           0
 305 #define MAT_ATTRIB_BACK_AMBIENT            1
 306 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 307 #define MAT_ATTRIB_BACK_DIFFUSE            3
 308 #define MAT_ATTRIB_FRONT_SPECULAR          4
 309 #define MAT_ATTRIB_BACK_SPECULAR           5
 310 #define MAT_ATTRIB_FRONT_EMISSION          6
 311 #define MAT_ATTRIB_BACK_EMISSION           7
 312 #define MAT_ATTRIB_FRONT_SHININESS         8
 313 #define MAT_ATTRIB_BACK_SHININESS          9
 314 #define MAT_ATTRIB_FRONT_INDEXES           10
 315 #define MAT_ATTRIB_BACK_INDEXES            11
 316 #define MAT_ATTRIB_MAX                     12
 317
 318 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 319 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 320 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 321 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 322 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 323 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 324
 325 #define MAT_INDEX_AMBIENT  0
 326 #define MAT_INDEX_DIFFUSE  1
 327 #define MAT_INDEX_SPECULAR 2
 328
 329 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 330 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 331 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 332 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 333 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 334 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 335 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 336 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 337 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 338 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 339 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 340 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 341
 342
 343 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 344                                  MAT_BIT_FRONT_AMBIENT |        \
 345                                  MAT_BIT_FRONT_DIFFUSE |        \
 346                                  MAT_BIT_FRONT_SPECULAR |       \
 347                                  MAT_BIT_FRONT_SHININESS |      \
 348                                  MAT_BIT_FRONT_INDEXES)
 349
 350 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 351                                  MAT_BIT_BACK_AMBIENT |         \
 352                                  MAT_BIT_BACK_DIFFUSE |         \
 353                                  MAT_BIT_BACK_SPECULAR |        \
 354                                  MAT_BIT_BACK_SHININESS |       \
 355                                  MAT_BIT_BACK_INDEXES)
 356
 357 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 358 /*@}*/
 359
 360
 361 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 362 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 363
 364 /**
 365  * Material shininess lookup table.
 366  */
 367 struct gl_shine_tab {
 368    struct gl_shine_tab *next, *prev;
 369    GLfloat tab[SHINE_TABLE_SIZE+1];
 370    GLfloat shininess;
 371    GLuint refcount;
 372 };
 373
 374
 375 /**
 376  * Light.
 377  */
 378 struct gl_light {
 379    struct gl_light *next;       /**< double linked list with sentinel */
 380    struct gl_light *prev;
 381
 382    GLfloat Ambient[4];          /**< ambient color */
 383    GLfloat Diffuse[4];          /**< diffuse color */
 384    GLfloat Specular[4];         /**< specular color */
 385    GLfloat EyePosition[4];      /**< position in eye coordinates */
 386    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 387    GLfloat SpotExponent;
 388    GLfloat SpotCutoff;          /**< in degrees */
 389    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 390    GLfloat ConstantAttenuation;
 391    GLfloat LinearAttenuation;
 392    GLfloat QuadraticAttenuation;
 393    GLboolean Enabled;           /**< On/off flag */
 394
 395    /**
 396     * \name Derived fields
 397     */
 398    /*@{*/
 399    GLuint _Flags;               /**< State */
 400
 401    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 402    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 403    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 404    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 405    GLfloat _VP_inf_spot_attenuation;
 406
 407    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 408    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 409    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 410    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 411    GLfloat _dli;                /**< CI diffuse light intensity */
 412    GLfloat _sli;                /**< CI specular light intensity */
 413    /*@}*/
 414 };
 415
 416
 417 /**
 418  * Light model.
 419  */
 420 struct gl_lightmodel {
 421    GLfloat Ambient[4];          /**< ambient color */
 422    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 423    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 424    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 425                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 426 };
 427
 428
 429 /**
 430  * Material.
 431  */
 432 struct gl_material
 433 {
 434    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 435 };
 436
 437
 438 /**
 439  * Accumulation buffer attributes.
 440  */
 441 struct gl_accum_attrib {
 442    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 443 };
 444
 445
 446 /**
 447  * Color buffer attributes.
 448  */
 449 struct gl_colorbuffer_attrib {
 450    GLuint ClearIndex;                   /**< Index to use for glClear */
 451    GLclampf ClearColor[4];              /**< Color to use for glClear */
 452
 453    GLuint IndexMask;                    /**< Color index write mask */
 454    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 455
 456    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 457    GLbitfield _DrawDestMask[MAX_DRAW_BUFFERS];/**< bitmask of DD_*_BIT bits */
 458
 459    /**
 460     * \name alpha testing
 461     */
 462    /*@{*/
 463    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 464    GLenum AlphaFunc;                    /**< Alpha test function */
 465    GLclampf AlphaRef;                   /**< Alpha reference value */
 466    /*@}*/
 467
 468    /**
 469     * \name Blending
 470     */
 471    /*@{*/
 472    GLboolean BlendEnabled;              /**< Blending enabled flag */
 473    GLenum BlendSrcRGB;                  /**< Blending source operator */
 474    GLenum BlendDstRGB;                  /**< Blending destination operator */
 475    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 476    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 477    GLenum BlendEquationRGB;             /**< Blending equation */
 478    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 479    GLfloat BlendColor[4];               /**< Blending color */
 480    /*@}*/
 481
 482    /**
 483     * \name Logic op
 484     */
 485    /*@{*/
 486    GLenum LogicOp;                      /**< Logic operator */
 487    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 488    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 489    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 490    /*@}*/
 491
 492    GLboolean DitherFlag;                /**< Dither enable flag */
 493 };
 494
 495
 496 /**
 497  * Current attributes.
 498  */
 499 struct gl_current_attrib {
 500    /**
 501     * \name Values valid only when FLUSH_VERTICES has been called.
 502     */
 503    /*@{*/
 504    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 505                                                   *  indexed by VERT_ATTRIB_* */
 506    GLfloat Index;                               /**< Current color index */
 507    GLboolean EdgeFlag;                          /**< Current edge flag */
 508    /*@}*/
 509
 510    /**
 511     * \name Values are always valid.
 512     *
 513     * \note BTW, note how similar this set of attributes is to the SWvertex
 514     * data type in the software rasterizer...
 515     */
 516    /*@{*/
 517    GLfloat RasterPos[4];                        /**< Current raster position */
 518    GLfloat RasterDistance;                      /**< Current raster distance */
 519    GLfloat RasterColor[4];                      /**< Current raster color */
 520    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 521    GLfloat RasterIndex;                         /**< Current raster index */
 522    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 523    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 524    /*@}*/
 525 };
 526
 527
 528 /**
 529  * Depth buffer attributes.
 530  */
 531 struct gl_depthbuffer_attrib {
 532    GLenum Func;                 /**< Function for depth buffer compare */
 533    GLclampd Clear;              /**< Value to clear depth buffer to */
 534    GLboolean Test;              /**< Depth buffering enabled flag */
 535    GLboolean Mask;              /**< Depth buffer writable? */
 536    GLboolean OcclusionTest;     /**< GL_HP_occlusion_test */
 537    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 538    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 539 };
 540
 541
 542 /**
 543  * glEnable()/glDisable() attributes.
 544  */
 545 struct gl_enable_attrib {
 546    GLboolean AlphaTest;
 547    GLboolean AutoNormal;
 548    GLboolean Blend;
 549    GLuint ClipPlanes;
 550    GLboolean ColorMaterial;
 551    GLboolean ColorTable;                /* SGI_color_table */
 552    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 553    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 554    GLboolean Convolution1D;
 555    GLboolean Convolution2D;
 556    GLboolean Separable2D;
 557    GLboolean CullFace;
 558    GLboolean DepthTest;
 559    GLboolean Dither;
 560    GLboolean Fog;
 561    GLboolean Histogram;
 562    GLboolean Light[MAX_LIGHTS];
 563    GLboolean Lighting;
 564    GLboolean LineSmooth;
 565    GLboolean LineStipple;
 566    GLboolean IndexLogicOp;
 567    GLboolean ColorLogicOp;
 568    GLboolean Map1Color4;
 569    GLboolean Map1Index;
 570    GLboolean Map1Normal;
 571    GLboolean Map1TextureCoord1;
 572    GLboolean Map1TextureCoord2;
 573    GLboolean Map1TextureCoord3;
 574    GLboolean Map1TextureCoord4;
 575    GLboolean Map1Vertex3;
 576    GLboolean Map1Vertex4;
 577    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 578    GLboolean Map2Color4;
 579    GLboolean Map2Index;
 580    GLboolean Map2Normal;
 581    GLboolean Map2TextureCoord1;
 582    GLboolean Map2TextureCoord2;
 583    GLboolean Map2TextureCoord3;
 584    GLboolean Map2TextureCoord4;
 585    GLboolean Map2Vertex3;
 586    GLboolean Map2Vertex4;
 587    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 588    GLboolean MinMax;
 589    GLboolean Normalize;
 590    GLboolean PixelTexture;
 591    GLboolean PointSmooth;
 592    GLboolean PolygonOffsetPoint;
 593    GLboolean PolygonOffsetLine;
 594    GLboolean PolygonOffsetFill;
 595    GLboolean PolygonSmooth;
 596    GLboolean PolygonStipple;
 597    GLboolean RescaleNormals;
 598    GLboolean Scissor;
 599    GLboolean Stencil;
 600    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 601    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 602    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 603    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 604    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 605    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 606    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 607    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 608    /* SGI_texture_color_table */
 609    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 610    /* GL_NV_vertex_program */
 611    GLboolean VertexProgram;
 612    GLboolean VertexProgramPointSize;
 613    GLboolean VertexProgramTwoSide;
 614    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 615    GLboolean PointSprite;
 616 };
 617
 618
 619 /**
 620  * Eval attributes.
 621  */
 622 struct gl_eval_attrib {
 623    /**
 624     * \name Enable bits
 625     */
 626    /*@{*/
 627    GLboolean Map1Color4;
 628    GLboolean Map1Index;
 629    GLboolean Map1Normal;
 630    GLboolean Map1TextureCoord1;
 631    GLboolean Map1TextureCoord2;
 632    GLboolean Map1TextureCoord3;
 633    GLboolean Map1TextureCoord4;
 634    GLboolean Map1Vertex3;
 635    GLboolean Map1Vertex4;
 636    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 637    GLboolean Map2Color4;
 638    GLboolean Map2Index;
 639    GLboolean Map2Normal;
 640    GLboolean Map2TextureCoord1;
 641    GLboolean Map2TextureCoord2;
 642    GLboolean Map2TextureCoord3;
 643    GLboolean Map2TextureCoord4;
 644    GLboolean Map2Vertex3;
 645    GLboolean Map2Vertex4;
 646    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 647    GLboolean AutoNormal;
 648    /*@}*/
 649
 650    /**
 651     * \name Map Grid endpoints and divisions and calculated du values
 652     */
 653    /*@{*/
 654    GLint MapGrid1un;
 655    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 656    GLint MapGrid2un, MapGrid2vn;
 657    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 658    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 659    /*@}*/
 660 };
 661
 662
 663 /**
 664  * Fog attributes.
 665  */
 666 struct gl_fog_attrib {
 667    GLboolean Enabled;           /**< Fog enabled flag */
 668    GLfloat Color[4];            /**< Fog color */
 669    GLfloat Density;             /**< Density >= 0.0 */
 670    GLfloat Start;               /**< Start distance in eye coords */
 671    GLfloat End;                 /**< End distance in eye coords */
 672    GLfloat Index;               /**< Fog index */
 673    GLenum Mode;                 /**< Fog mode */
 674    GLboolean ColorSumEnabled;
 675    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 676 };
 677
 678
 679 /**
 680  * Hint attributes.
 681  *
 682  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 683  */
 684 struct gl_hint_attrib {
 685    GLenum PerspectiveCorrection;
 686    GLenum PointSmooth;
 687    GLenum LineSmooth;
 688    GLenum PolygonSmooth;
 689    GLenum Fog;
 690    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 691    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 692    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 693 };
 694
 695
 696 /**
 697  * Histogram attributes.
 698  */
 699 struct gl_histogram_attrib {
 700    GLuint Width;                                /**< number of table entries */
 701    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 702    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 703    GLboolean Sink;                              /**< terminate image transfer? */
 704    GLubyte RedSize;                             /**< Bits per counter */
 705    GLubyte GreenSize;
 706    GLubyte BlueSize;
 707    GLubyte AlphaSize;
 708    GLubyte LuminanceSize;
 709 };
 710
 711
 712 /**
 713  * Color Min/max state.
 714  */
 715 struct gl_minmax_attrib {
 716    GLenum Format;
 717    GLboolean Sink;
 718    GLfloat Min[4], Max[4];   /**< RGBA */
 719 };
 720
 721
 722 /**
 723  * Image convolution state.
 724  */
 725 struct gl_convolution_attrib {
 726    GLenum Format;
 727    GLenum InternalFormat;
 728    GLuint Width;
 729    GLuint Height;
 730    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 731 };
 732
 733
 734 /**
 735  * Light state flags.
 736  */
 737 /*@{*/
 738 #define LIGHT_SPOT         0x1
 739 #define LIGHT_LOCAL_VIEWER 0x2
 740 #define LIGHT_POSITIONAL   0x4
 741 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 742 /*@}*/
 743
 744
 745 /**
 746  * Lighting attributes.
 747  */
 748 struct gl_light_attrib {
 749    struct gl_light Light[MAX_LIGHTS];   /**< Array of lights */
 750    struct gl_lightmodel Model;          /**< Lighting model */
 751
 752    /**
 753     * Must flush FLUSH_VERTICES before referencing:
 754     */
 755    /*@{*/
 756    struct gl_material Material;         /**< Includes front & back values */
 757    /*@}*/
 758
 759    GLboolean Enabled;                   /**< Lighting enabled flag */
 760    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 761    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 762    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 763    GLuint ColorMaterialBitmask;         /**< bitmask formed from Face and Mode */
 764    GLboolean ColorMaterialEnabled;
 765
 766    struct gl_light EnabledList;         /**< List sentinel */
 767
 768    /**
 769     * Derived for optimizations:
 770     */
 771    /*@{*/
 772    GLboolean _NeedEyeCoords;
 773    GLboolean _NeedVertices;             /**< Use fast shader? */
 774    GLuint  _Flags;                      /**< LIGHT_* flags, see above */
 775    GLfloat _BaseColor[2][3];
 776    /*@}*/
 777 };
 778
 779
 780 /**
 781  * Line attributes.
 782  */
 783 struct gl_line_attrib {
 784    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 785    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 786    GLushort StipplePattern;     /**< Stipple pattern */
 787    GLint StippleFactor;         /**< Stipple repeat factor */
 788    GLfloat Width;               /**< Line width */
 789    GLfloat _Width;              /**< Clamped Line width */
 790 };
 791
 792
 793 /**
 794  * Display list state.
 795  */
 796 struct gl_list_attrib {
 797    GLuint ListBase;
 798 };
 799
 800
 801 struct gl_list_instruction {
 802    GLuint Size;
 803    void (*Execute)( GLcontext *ctx, void *data );
 804    void (*Destroy)( GLcontext *ctx, void *data );
 805    void (*Print)( GLcontext *ctx, void *data );
 806 };
 807
 808 #define MAX_DLIST_EXT_OPCODES 16
 809
 810 struct gl_list_extensions {
 811    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 812    GLuint NumOpcodes;
 813 };
 814
 815
 816 /**
 817  * Multisample state
 818  */
 819 struct gl_multisample_attrib {
 820    GLboolean Enabled;
 821    GLboolean SampleAlphaToCoverage;
 822    GLboolean SampleAlphaToOne;
 823    GLboolean SampleCoverage;
 824    GLfloat SampleCoverageValue;
 825    GLboolean SampleCoverageInvert;
 826 };
 827
 828
 829 /**
 830  * Pixel attributes.
 831  */
 832 struct gl_pixel_attrib {
 833    GLenum ReadBuffer;           /**< source buffer for glReadPixels()/glCopyPixels() */
 834    GLubyte _ReadSrcMask;        /**< Not really a mask, but like _DrawDestMask
 835                                   *
 836                                   * May be: FRONT_LEFT_BIT, BACK_LEFT_BIT,
 837                                   * FRONT_RIGHT_BIT or BACK_RIGHT_BIT. */
 838    GLfloat RedBias, RedScale;
 839    GLfloat GreenBias, GreenScale;
 840    GLfloat BlueBias, BlueScale;
 841    GLfloat AlphaBias, AlphaScale;
 842    GLfloat DepthBias, DepthScale;
 843    GLint IndexShift, IndexOffset;
 844    GLboolean MapColorFlag;
 845    GLboolean MapStencilFlag;
 846    GLfloat ZoomX, ZoomY;
 847    /* XXX move these out of gl_pixel_attrib */
 848    GLint MapStoSsize;           /**< Size of each pixel map */
 849    GLint MapItoIsize;
 850    GLint MapItoRsize;
 851    GLint MapItoGsize;
 852    GLint MapItoBsize;
 853    GLint MapItoAsize;
 854    GLint MapRtoRsize;
 855    GLint MapGtoGsize;
 856    GLint MapBtoBsize;
 857    GLint MapAtoAsize;
 858    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 859    GLint MapItoI[MAX_PIXEL_MAP_TABLE];
 860    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 861    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 862    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 863    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 864    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 865    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 866    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 867    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 868    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 869    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 870    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 871    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 872    /** GL_EXT_histogram */
 873    GLboolean HistogramEnabled;
 874    GLboolean MinMaxEnabled;
 875    /** GL_SGIS_pixel_texture */
 876    GLboolean PixelTextureEnabled;
 877    GLenum FragmentRgbSource;
 878    GLenum FragmentAlphaSource;
 879    /** GL_SGI_color_matrix */
 880    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 881    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 882    /** GL_SGI_color_table */
 883    GLfloat ColorTableScale[4];
 884    GLfloat ColorTableBias[4];
 885    GLboolean ColorTableEnabled;
 886    GLfloat PCCTscale[4];
 887    GLfloat PCCTbias[4];
 888    GLboolean PostConvolutionColorTableEnabled;
 889    GLfloat PCMCTscale[4];
 890    GLfloat PCMCTbias[4];
 891    GLboolean PostColorMatrixColorTableEnabled;
 892    /** GL_SGI_texture_color_table */
 893    GLfloat TextureColorTableScale[4];
 894    GLfloat TextureColorTableBias[4];
 895    /** Convolution */
 896    GLboolean Convolution1DEnabled;
 897    GLboolean Convolution2DEnabled;
 898    GLboolean Separable2DEnabled;
 899    GLfloat ConvolutionBorderColor[3][4];
 900    GLenum ConvolutionBorderMode[3];
 901    GLfloat ConvolutionFilterScale[3][4];
 902    GLfloat ConvolutionFilterBias[3][4];
 903    GLfloat PostConvolutionScale[4];  /**< RGBA */
 904    GLfloat PostConvolutionBias[4];   /**< RGBA */
 905 };
 906
 907
 908 /**
 909  * Point attributes.
 910  */
 911 struct gl_point_attrib {
 912    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 913    GLfloat Size;                /**< User-specified point size */
 914    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
 915    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 916    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 917    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 918    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 919    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
 920    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV_point_sprite / GL_NV_point_sprite */
 921    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 922    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
 923 };
 924
 925
 926 /**
 927  * Polygon attributes.
 928  */
 929 struct gl_polygon_attrib {
 930    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
 931    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
 932    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
 933    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
 934    GLboolean CullFlag;          /**< Culling on/off flag */
 935    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
 936    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
 937    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
 938    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
 939    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
 940    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
 941    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
 942    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
 943 };
 944
 945
 946 /**
 947  * Scissor attributes.
 948  */
 949 struct gl_scissor_attrib {
 950    GLboolean Enabled;           /**< Scissor test enabled? */
 951    GLint X, Y;                  /**< Lower left corner of box */
 952    GLsizei Width, Height;       /**< Size of box */
 953 };
 954
 955
 956 /**
 957  * Stencil attributes.
 958  */
 959 struct gl_stencil_attrib {
 960    GLboolean Enabled;           /**< Enabled flag */
 961    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
 962    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
 963    GLenum Function[2];          /**< Stencil function */
 964    GLenum FailFunc[2];          /**< Fail function */
 965    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
 966    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
 967    GLstencil Ref[2];            /**< Reference value */
 968    GLstencil ValueMask[2];      /**< Value mask */
 969    GLstencil WriteMask[2];      /**< Write mask */
 970    GLstencil Clear;             /**< Clear value */
 971 };
 972
 973
 974 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
 975
 976 /**
 977  * An index for each type of texture object
 978  */
 979 /*@{*/
 980 #define TEXTURE_1D_INDEX    0
 981 #define TEXTURE_2D_INDEX    1
 982 #define TEXTURE_3D_INDEX    2
 983 #define TEXTURE_CUBE_INDEX  3
 984 #define TEXTURE_RECT_INDEX  4
 985 /*@}*/
 986
 987 /**
 988  * Bit flags for each type of texture object
 989  * Used for Texture.Unit[]._ReallyEnabled flags.
 990  */
 991 /*@{*/
 992 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
 993 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
 994 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
 995 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
 996 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
 997 /*@}*/
 998
 999
1000 /**
1001  * TexGenEnabled flags.
1002  */
1003 /*@{*/
1004 #define S_BIT 1
1005 #define T_BIT 2
1006 #define R_BIT 4
1007 #define Q_BIT 8
1008 /*@}*/
1009
1010
1011 /**
1012  * Bit flag versions of the corresponding GL_ constants.
1013  */
1014 /*@{*/
1015 #define TEXGEN_SPHERE_MAP        0x1
1016 #define TEXGEN_OBJ_LINEAR        0x2
1017 #define TEXGEN_EYE_LINEAR        0x4
1018 #define TEXGEN_REFLECTION_MAP_NV 0x8
1019 #define TEXGEN_NORMAL_MAP_NV     0x10
1020
1021 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1022                                   TEXGEN_REFLECTION_MAP_NV | \
1023                                   TEXGEN_NORMAL_MAP_NV)
1024 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1025                                   TEXGEN_REFLECTION_MAP_NV | \
1026                                   TEXGEN_NORMAL_MAP_NV     | \
1027                                   TEXGEN_EYE_LINEAR)
1028 /*@}*/
1029
1030
1031 /* A selection of state flags to make driver and module's lives easier. */
1032 #define ENABLE_TEXGEN0        0x1
1033 #define ENABLE_TEXGEN1        0x2
1034 #define ENABLE_TEXGEN2        0x4
1035 #define ENABLE_TEXGEN3        0x8
1036 #define ENABLE_TEXGEN4        0x10
1037 #define ENABLE_TEXGEN5        0x20
1038 #define ENABLE_TEXGEN6        0x40
1039 #define ENABLE_TEXGEN7        0x80
1040
1041 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1042 #define ENABLE_TEXMAT1        0x2
1043 #define ENABLE_TEXMAT2        0x4
1044 #define ENABLE_TEXMAT3        0x8
1045 #define ENABLE_TEXMAT4        0x10
1046 #define ENABLE_TEXMAT5        0x20
1047 #define ENABLE_TEXMAT6        0x40
1048 #define ENABLE_TEXMAT7        0x80
1049
1050 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1051 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1052
1053
1054 /**
1055  * Texel fetch function prototype.  We use texel fetch functions to
1056  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1057  * texture images.  These functions help to isolate us from the gritty
1058  * details of all the various texture image encodings.
1059  *
1060  * \param texImage texture image.
1061  * \param col texel column.
1062  * \param row texel row.
1063  * \param img texel image level/layer.
1064  * \param texelOut output texel (up to 4 GLchans)
1065  */
1066 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1067                                  GLint col, GLint row, GLint img,
1068                                  GLchan *texelOut );
1069
1070 /**
1071  * As above, but returns floats.
1072  * Used for depth component images and for upcoming signed/float
1073  * texture images.
1074  */
1075 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1076                                  GLint col, GLint row, GLint img,
1077                                  GLfloat *texelOut );
1078
1079
1080 /**
1081  * TexImage store function.  This is called by the glTex[Sub]Image
1082  * functions and is responsible for converting the user-specified texture
1083  * image into a specific (hardware) image format.
1084  */
1085 typedef GLboolean (*StoreTexImageFunc)(GLcontext *ctx, GLuint dims,
1086                           GLenum baseInternalFormat,
1087                           const struct gl_texture_format *dstFormat,
1088                           GLvoid *dstAddr,
1089                           GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
1090                           GLint dstRowStride, GLint dstImageStride,
1091                           GLint srcWidth, GLint srcHeight, GLint srcDepth,
1092                           GLenum srcFormat, GLenum srcType,
1093                           const GLvoid *srcAddr,
1094                           const struct gl_pixelstore_attrib *srcPacking);
1095
1096
1097
1098 /**
1099  * Texture format record
1100  */
1101 struct gl_texture_format {
1102    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1103
1104    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1105                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1106                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1107                                  *   GL_DEPTH_COMPONENT.
1108                                  */
1109    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1110    GLubyte RedBits;             /**< Bits per texel component */
1111    GLubyte GreenBits;           /**< These are just rough approximations for */
1112    GLubyte BlueBits;            /**< compressed texture formats. */
1113    GLubyte AlphaBits;
1114    GLubyte LuminanceBits;
1115    GLubyte IntensityBits;
1116    GLubyte IndexBits;
1117    GLubyte DepthBits;
1118
1119    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1120
1121    StoreTexImageFunc StoreImage;
1122
1123    /**
1124     * \name Texel fetch function pointers
1125     */
1126    /*@{*/
1127    FetchTexelFuncC FetchTexel1D;
1128    FetchTexelFuncC FetchTexel2D;
1129    FetchTexelFuncC FetchTexel3D;
1130    FetchTexelFuncF FetchTexel1Df;
1131    FetchTexelFuncF FetchTexel2Df;
1132    FetchTexelFuncF FetchTexel3Df;
1133    /*@}*/
1134 };
1135
1136
1137 /**
1138  * Texture image record
1139  */
1140 struct gl_texture_image {
1141    GLenum Format;               /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1142                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1143                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1144                                  *   GL_DEPTH_COMPONENT only.
1145                                  *   Used for choosing TexEnv arithmetic.
1146                                  */
1147    GLint IntFormat;             /**< Internal format as given by the user */
1148    GLuint Border;               /**< 0 or 1 */
1149    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1150    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1151    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1152    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1153    GLuint Width2;               /**< = Width - 2*Border */
1154    GLuint Height2;              /**< = Height - 2*Border */
1155    GLuint Depth2;               /**< = Depth - 2*Border */
1156    GLuint WidthLog2;            /**< = log2(Width2) */
1157    GLuint HeightLog2;           /**< = log2(Height2) */
1158    GLuint DepthLog2;            /**< = log2(Depth2) */
1159    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1160    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1161    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1162    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1163    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1164    GLboolean IsClientData;      /**< Data owned by client? */
1165    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1166
1167    const struct gl_texture_format *TexFormat;
1168
1169    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1170
1171    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1172    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1173
1174    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1175    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1176
1177    /**
1178     * \name For device driver:
1179     */
1180    /*@{*/
1181    void *DriverData;            /**< Arbitrary device driver data */
1182    /*@}*/
1183 };
1184
1185
1186 /**
1187  * Indexes for cube map faces.
1188  */
1189 /*@{*/
1190 #define FACE_POS_X   0
1191 #define FACE_NEG_X   1
1192 #define FACE_POS_Y   2
1193 #define FACE_NEG_Y   3
1194 #define FACE_POS_Z   4
1195 #define FACE_NEG_Z   5
1196 #define MAX_FACES  6
1197 /*@}*/
1198
1199
1200 /**
1201  * Texture object record
1202  */
1203 struct gl_texture_object {
1204    _glthread_Mutex Mutex;       /**< for thread safety */
1205    GLint RefCount;              /**< reference count */
1206    GLboolean DeletePending;     /**< Has glDeleteTexture been called? */
1207    GLuint Name;                 /**< an unsigned integer */
1208    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1209    GLfloat Priority;            /**< in [0,1] */
1210    GLfloat BorderColor[4];      /**< unclamped */
1211    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1212    /** \name Wrap modes
1213     * Are GL_CLAMP, REPEAT, GL_CLAMP_TO_EDGE, and GL_CLAMP_TO_BORDER_ARB. */
1214    /*@{*/
1215    GLenum WrapS;
1216    GLenum WrapT;
1217    GLenum WrapR;
1218    /*@}*/
1219    GLenum MinFilter;            /**< minification filter */
1220    GLenum MagFilter;            /**< magnification filter */
1221    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1222    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1223    GLfloat LodBias;             /**< OpenGL 1.4 */
1224    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1225    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1226    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1227    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1228    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1229    GLfloat ShadowAmbient;
1230    GLenum CompareMode;          /**< GL_ARB_shadow */
1231    GLenum CompareFunc;          /**< GL_ARB_shadow */
1232    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1233    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1234    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1235    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1236    GLboolean _IsPowerOfTwo;     /**< Are all image dimensions powers of two? */
1237
1238    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1239
1240    /** GL_EXT_paletted_texture */
1241    struct gl_color_table Palette;
1242
1243    GLboolean Complete;                  /**< Is texture object complete? */
1244    struct gl_texture_object *Next;      /**< Next in linked list */
1245
1246    /**
1247     * \name For device driver
1248     */
1249    /*@{*/
1250    void *DriverData;    /**< Arbitrary device driver data */
1251    /*@}*/
1252 };
1253
1254
1255 /**
1256  * Texture combine environment state.
1257  *
1258  * \todo
1259  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1260  * structure will need to be expanded for 4 elements.
1261  */
1262 struct gl_tex_env_combine_state {
1263    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1264    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1265    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1266    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1267    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1268    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1269    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1270    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1271    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1272    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1273 };
1274
1275
1276 /**
1277  * Texture unit record
1278  */
1279 struct gl_texture_unit {
1280    GLuint Enabled;              /**< bitmask of TEXTURE_*_BIT flags */
1281    GLuint _ReallyEnabled;       /**< 0 or exactly one of TEXTURE_*_BIT flags */
1282
1283    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1284    GLfloat EnvColor[4];
1285    GLuint TexGenEnabled;        /**< Bitwise-OR of [STRQ]_BIT values */
1286    /** \name Tex coord generation mode
1287     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1288    /*@{*/
1289    GLenum GenModeS;
1290    GLenum GenModeT;
1291    GLenum GenModeR;
1292    GLenum GenModeQ;
1293    /*@}*/
1294    GLuint _GenBitS;
1295    GLuint _GenBitT;
1296    GLuint _GenBitR;
1297    GLuint _GenBitQ;
1298    GLuint _GenFlags;            /**< bitwise or of GenBit[STRQ] */
1299    GLfloat ObjectPlaneS[4];
1300    GLfloat ObjectPlaneT[4];
1301    GLfloat ObjectPlaneR[4];
1302    GLfloat ObjectPlaneQ[4];
1303    GLfloat EyePlaneS[4];
1304    GLfloat EyePlaneT[4];
1305    GLfloat EyePlaneR[4];
1306    GLfloat EyePlaneQ[4];
1307    GLfloat LodBias;             /**< for biasing mipmap levels */
1308
1309    /**
1310     * \name GL_EXT_texture_env_combine
1311     */
1312    struct gl_tex_env_combine_state Combine;
1313
1314    /**
1315     * Derived state based on \c EnvMode and the \c BaseFormat of the
1316     * currently enabled texture.
1317     */
1318    struct gl_tex_env_combine_state _EnvMode;
1319
1320    /**
1321     * Currently enabled combiner state.  This will point to either
1322     * \c Combine or \c _EnvMode.
1323     */
1324    struct gl_tex_env_combine_state *_CurrentCombine;
1325
1326    struct gl_texture_object *Current1D;
1327    struct gl_texture_object *Current2D;
1328    struct gl_texture_object *Current3D;
1329    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1330    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1331
1332    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1333
1334    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1335    struct gl_texture_object Saved2D;
1336    struct gl_texture_object Saved3D;
1337    struct gl_texture_object SavedCubeMap;
1338    struct gl_texture_object SavedRect;
1339
1340    /* GL_SGI_texture_color_table */
1341    struct gl_color_table ColorTable;
1342    struct gl_color_table ProxyColorTable;
1343    GLboolean ColorTableEnabled;
1344 };
1345
1346
1347 /**
1348  * Texture attributes
1349  */
1350 struct gl_texture_attrib {
1351    /**
1352     * name multitexture
1353     */
1354    /**@{*/
1355    GLuint CurrentUnit;          /**< Active texture unit */
1356    GLuint _EnabledUnits;        /**< one bit set for each really-enabled unit */
1357    GLuint _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1358    GLuint _GenFlags;            /**< for texgen */
1359    GLuint _TexGenEnabled;
1360    GLuint _TexMatEnabled;
1361    /**@}*/
1362
1363    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1364
1365    struct gl_texture_object *Proxy1D;
1366    struct gl_texture_object *Proxy2D;
1367    struct gl_texture_object *Proxy3D;
1368    struct gl_texture_object *ProxyCubeMap;
1369    struct gl_texture_object *ProxyRect;
1370
1371    /** GL_EXT_shared_texture_palette */
1372    GLboolean SharedPalette;
1373    struct gl_color_table Palette;
1374 };
1375
1376
1377 /**
1378  * Transformation attributes.
1379  */
1380 struct gl_transform_attrib {
1381    GLenum MatrixMode;                           /**< Matrix mode */
1382    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1383    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1384    GLuint ClipPlanesEnabled;                    /**< on/off bitmask */
1385    GLboolean Normalize;                         /**< Normalize all normals? */
1386    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1387    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1388
1389    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1390    GLfloat CullEyePos[4];
1391    GLfloat CullObjPos[4];
1392 };
1393
1394
1395 /**
1396  * Viewport attributes.
1397  */
1398 struct gl_viewport_attrib {
1399    GLint X, Y;                  /**< position */
1400    GLsizei Width, Height;       /**< size */
1401    GLfloat Near, Far;           /**< Depth buffer range */
1402    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1403 };
1404
1405
1406 /**
1407  * Node for the attribute stack
1408  */
1409 struct gl_attrib_node {
1410    GLbitfield kind;
1411    void *data;
1412    struct gl_attrib_node *next;
1413 };
1414
1415
1416 /**
1417  * GL_ARB_vertex/pixel_buffer_object buffer object
1418  */
1419 struct gl_buffer_object {
1420    GLint RefCount;
1421    GLuint Name;
1422    GLenum Usage;
1423    GLenum Access;
1424    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1425    GLuint Size;              /**< Size of storage in bytes */
1426    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1427    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1428    GLboolean DeletePending;  /**< Deleted by user but RefCount > 0? */
1429 };
1430
1431
1432
1433 /**
1434  * Client pixel packing/unpacking attributes
1435  */
1436 struct gl_pixelstore_attrib {
1437    GLint Alignment;
1438    GLint RowLength;
1439    GLint SkipPixels;
1440    GLint SkipRows;
1441    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1442    GLint SkipImages;      /**< for GL_EXT_texture3D */
1443    GLboolean SwapBytes;
1444    GLboolean LsbFirst;
1445    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1446    GLboolean Invert;        /**< GL_MESA_pack_invert */
1447    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1448 };
1449
1450
1451 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1452
1453
1454 /**
1455  * Client vertex array attributes
1456  */
1457 struct gl_client_array {
1458    GLint Size;                  /**< components per element (1,2,3,4) */
1459    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1460    GLsizei Stride;              /**< user-specified stride */
1461    GLsizei StrideB;             /**< actual stride in bytes */
1462    const GLubyte *Ptr;          /**< Points to array data */
1463    GLuint Enabled;              /**< one of the _NEW_ARRAY_ bits */
1464    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1465
1466    /**< GL_ARB_vertex_buffer_object */
1467    struct gl_buffer_object *BufferObj;
1468    GLuint _MaxElement;
1469
1470    GLuint Flags;
1471 };
1472
1473
1474 /**
1475  * Vertex array state
1476  */
1477 struct gl_array_attrib {
1478    struct gl_client_array Vertex;            /**< client data descriptors */
1479    struct gl_client_array Normal;
1480    struct gl_client_array Color;
1481    struct gl_client_array SecondaryColor;
1482    struct gl_client_array FogCoord;
1483    struct gl_client_array Index;
1484    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1485    struct gl_client_array EdgeFlag;
1486
1487    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1488
1489    GLint ActiveTexture;         /**< Client Active Texture */
1490    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1491    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1492
1493    GLuint _Enabled;             /**< _NEW_ARRAY_* - bit set if array enabled */
1494    GLuint NewState;             /**< _NEW_ARRAY_* */
1495
1496 #if FEATURE_ARB_vertex_buffer_object
1497    struct gl_buffer_object *NullBufferObj;
1498    struct gl_buffer_object *ArrayBufferObj;
1499    struct gl_buffer_object *ElementArrayBufferObj;
1500 #endif
1501    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1502 };
1503
1504
1505 /**
1506  * Feedback buffer state
1507  */
1508 struct gl_feedback {
1509    GLenum Type;
1510    GLuint _Mask;                /* FB_* bits */
1511    GLfloat *Buffer;
1512    GLuint BufferSize;
1513    GLuint Count;
1514 };
1515
1516
1517 /**
1518  * Selection buffer state
1519  */
1520 struct gl_selection {
1521    GLuint *Buffer;      /**< selection buffer */
1522    GLuint BufferSize;   /**< size of the selection buffer */
1523    GLuint BufferCount;  /**< number of values in the selection buffer */
1524    GLuint Hits;         /**< number of records in the selection buffer */
1525    GLuint NameStackDepth; /**< name stack depth */
1526    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1527    GLboolean HitFlag;   /**< hit flag */
1528    GLfloat HitMinZ;     /**< minimum hit depth */
1529    GLfloat HitMaxZ;     /**< maximum hit depth */
1530 };
1531
1532
1533 /**
1534  * 1-D Evaluator control points
1535  */
1536 struct gl_1d_map
1537 {
1538    GLuint Order;        /**< Number of control points */
1539    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1540    GLfloat *Points;     /**< Points to contiguous control points */
1541 };
1542
1543
1544 /**
1545  * 2-D Evaluator control points
1546  */
1547 struct gl_2d_map
1548 {
1549    GLuint Uorder;               /**< Number of control points in U dimension */
1550    GLuint Vorder;               /**< Number of control points in V dimension */
1551    GLfloat u1, u2, du;
1552    GLfloat v1, v2, dv;
1553    GLfloat *Points;             /**< Points to contiguous control points */
1554 };
1555
1556
1557 /**
1558  * All evaluator control point state
1559  */
1560 struct gl_evaluators
1561 {
1562    /**
1563     * \name 1-D maps
1564     */
1565    /*@{*/
1566    struct gl_1d_map Map1Vertex3;
1567    struct gl_1d_map Map1Vertex4;
1568    struct gl_1d_map Map1Index;
1569    struct gl_1d_map Map1Color4;
1570    struct gl_1d_map Map1Normal;
1571    struct gl_1d_map Map1Texture1;
1572    struct gl_1d_map Map1Texture2;
1573    struct gl_1d_map Map1Texture3;
1574    struct gl_1d_map Map1Texture4;
1575    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1576    /*@}*/
1577
1578    /**
1579     * \name 2-D maps
1580     */
1581    /*@{*/
1582    struct gl_2d_map Map2Vertex3;
1583    struct gl_2d_map Map2Vertex4;
1584    struct gl_2d_map Map2Index;
1585    struct gl_2d_map Map2Color4;
1586    struct gl_2d_map Map2Normal;
1587    struct gl_2d_map Map2Texture1;
1588    struct gl_2d_map Map2Texture2;
1589    struct gl_2d_map Map2Texture3;
1590    struct gl_2d_map Map2Texture4;
1591    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1592    /*@}*/
1593 };
1594
1595
1596 /**
1597  * NV_fragment_program runtime state
1598  */
1599 struct fp_machine
1600 {
1601    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1602    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1603    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1604    GLuint CondCodes[4];
1605 };
1606
1607
1608 /**
1609  * Names of the various vertex/fragment register files
1610  */
1611 enum register_file
1612 {
1613    PROGRAM_TEMPORARY = 10,
1614    PROGRAM_INPUT,
1615    PROGRAM_OUTPUT,
1616    PROGRAM_LOCAL_PARAM,
1617    PROGRAM_ENV_PARAM,
1618    PROGRAM_NAMED_PARAM,
1619    PROGRAM_STATE_VAR,
1620    PROGRAM_WRITE_ONLY,
1621    PROGRAM_ADDRESS
1622 };
1623
1624
1625 /** Vertex and fragment instructions */
1626 struct vp_instruction;
1627 struct fp_instruction;
1628
1629 struct program_parameter_list;
1630
1631
1632 /**
1633  * Base class for any kind of program object
1634  */
1635 struct program
1636 {
1637    GLuint Id;
1638    GLubyte *String;          /**< Null-terminated program text */
1639    GLboolean DeletePending;  /**< User called glDeletePrograms? */
1640    GLint RefCount;
1641    GLenum Target;
1642    GLenum Format;            /**< String encoding format */
1643    GLboolean Resident;
1644    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1645    GLuint NumInstructions;  /* GL_ARB_vertex/fragment_program */
1646    GLuint NumTemporaries;
1647    GLuint NumParameters;
1648    GLuint NumAttributes;
1649    GLuint NumAddressRegs;
1650 };
1651
1652
1653 /** Vertex program object */
1654 struct vertex_program
1655 {
1656    struct program Base;   /* base class */
1657    struct vp_instruction *Instructions;  /* Compiled instructions */
1658    GLboolean IsNVProgram; /* GL_NV_vertex_program ? */
1659    GLboolean IsPositionInvariant;  /* GL_NV_vertex_program1_1 */
1660    GLuint InputsRead;     /* Bitmask of which input regs are read */
1661    GLuint OutputsWritten; /* Bitmask of which output regs are written to */
1662    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1663 };
1664
1665
1666 /** Fragment program object */
1667 struct fragment_program
1668 {
1669    struct program Base;   /**< base class */
1670    struct fp_instruction *Instructions;  /**< Compiled instructions */
1671    GLuint InputsRead;     /**< Bitmask of which input regs are read */
1672    GLuint OutputsWritten; /**< Bitmask of which output regs are written to */
1673    GLuint TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_INDEX bitmask */
1674    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1675    GLuint NumTexInstructions;
1676    GLuint NumTexIndirections;
1677    GLenum FogOption;
1678    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1679
1680 #ifdef USE_TCC
1681    char c_str[4096];            /* experimental... */
1682    int c_strlen;
1683 #endif
1684 };
1685
1686
1687 /**
1688  * State common to vertex and fragment programs.
1689  */
1690 struct program_state {
1691    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_NV */
1692    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_NV */
1693 };
1694
1695
1696 /**
1697  * State vars for GL_ARB/GL_NV_vertex_program
1698  */
1699 struct vertex_program_state
1700 {
1701    GLboolean Enabled;                  /**< GL_VERTEX_PROGRAM_NV */
1702    GLboolean _Enabled;                 /**< Really enabled? */
1703    GLboolean PointSizeEnabled;         /**< GL_VERTEX_PROGRAM_POINT_SIZE_NV */
1704    GLboolean TwoSideEnabled;           /**< GL_VERTEX_PROGRAM_TWO_SIDE_NV */
1705    struct vertex_program *Current;     /**< ptr to currently bound program */
1706
1707    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1708    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1709
1710    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1711    /* Only used during program execution (may be moved someday): */
1712    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1713    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1714    GLuint InputsSize[MAX_NV_VERTEX_PROGRAM_INPUTS];
1715    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1716    GLint AddressReg[4];
1717
1718 #if FEATURE_MESA_program_debug
1719    GLprogramcallbackMESA Callback;
1720    GLvoid *CallbackData;
1721    GLboolean CallbackEnabled;
1722    GLuint CurrentPosition;
1723 #endif
1724 };
1725
1726
1727 /*
1728  * State for GL_ARB/NV_fragment_program
1729  */
1730 struct fragment_program_state
1731 {
1732    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1733    GLboolean _Enabled;                   /* Really enabled? */
1734    struct fragment_program *Current;     /* ptr to currently bound program */
1735    struct fp_machine Machine;            /* machine state */
1736    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1737
1738 #if FEATURE_MESA_program_debug
1739    GLprogramcallbackMESA Callback;
1740    GLvoid *CallbackData;
1741    GLboolean CallbackEnabled;
1742    GLuint CurrentPosition;
1743 #endif
1744 };
1745
1746
1747 /*
1748  * State for GL_ARB_occlusion_query
1749  */
1750 struct occlusion_state
1751 {
1752    GLboolean Active;
1753    GLuint CurrentQueryObject;
1754    GLuint PassedCounter;
1755    struct _mesa_HashTable *QueryObjects;
1756 };
1757
1758
1759 /**
1760  * State which can be shared by multiple contexts:
1761  */
1762 struct gl_shared_state
1763 {
1764    _glthread_Mutex Mutex;                  /**< for thread safety */
1765    GLint RefCount;                         /**< Reference count */
1766    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
1767    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
1768    struct gl_texture_object *TexObjectList;/**< Linked list of texture objects */
1769
1770    /**
1771     * \name Default texture objects (shared by all multi-texture units)
1772     */
1773    /*@{*/
1774    struct gl_texture_object *Default1D;
1775    struct gl_texture_object *Default2D;
1776    struct gl_texture_object *Default3D;
1777    struct gl_texture_object *DefaultCubeMap;
1778    struct gl_texture_object *DefaultRect;
1779    /*@}*/
1780
1781    /**
1782     * \name GL_NV_vertex/_program
1783     */
1784    /*@{*/
1785    struct _mesa_HashTable *Programs;
1786 #if FEATURE_ARB_vertex_program
1787    struct program *DefaultVertexProgram;
1788 #endif
1789 #if FEATURE_ARB_fragment_program
1790    struct program *DefaultFragmentProgram;
1791 #endif
1792    /*@}*/
1793
1794 #if FEATURE_ARB_vertex_buffer_object
1795    struct _mesa_HashTable *BufferObjects;
1796 #endif
1797
1798    void *DriverData;  /**< Device driver shared state */
1799 };
1800
1801
1802 /**
1803  * Frame buffer.
1804  *
1805  * A "frame buffer" is a color buffer and its optional ancillary buffers:
1806  * depth, accum, stencil, and software-simulated alpha buffers.
1807  * In C++ terms, think of this as a base class from which device drivers
1808  * will make derived classes.
1809  */
1810 struct gl_frame_buffer
1811 {
1812    GLvisual Visual;             /**< The corresponding visual */
1813
1814    GLuint Width, Height;        /**< size of frame buffer in pixels */
1815
1816    GLboolean UseSoftwareDepthBuffer;
1817    GLboolean UseSoftwareAccumBuffer;
1818    GLboolean UseSoftwareStencilBuffer;
1819    GLboolean UseSoftwareAlphaBuffers;
1820    GLboolean UseSoftwareAuxBuffers;
1821
1822    /** \name Software depth (aka Z) buffer */
1823    /*@{*/
1824    GLvoid *DepthBuffer;         /**< array [Width*Height] of GLushort or GLuint*/
1825    /*@}*/
1826
1827    /** \name Software stencil buffer */
1828    /*@{*/
1829    GLstencil *Stencil;          /**< array [Width*Height] of GLstencil values */
1830    /*@}*/
1831
1832    /** \name Software accumulation buffer */
1833    /*@{*/
1834    GLaccum *Accum;              /**< array [4*Width*Height] of GLaccum values */
1835    /*@}*/
1836
1837    /** \name Software alpha planes */
1838    /*@{*/
1839    GLchan *FrontLeftAlpha;      /**< array [Width*Height] of GLchan */
1840    GLchan *BackLeftAlpha;       /**< array [Width*Height] of GLchan */
1841    GLchan *FrontRightAlpha;     /**< array [Width*Height] of GLchan */
1842    GLchan *BackRightAlpha;      /**< array [Width*Height] of GLchan */
1843    /*@}*/
1844
1845    GLchan *AuxBuffers[MAX_AUX_BUFFERS];
1846
1847    /**
1848     * \name Drawing bounds
1849     *
1850     * Intersection of window size and scissor box
1851     */
1852    /*@{*/
1853    GLint _Xmin;  /**< inclusive */
1854    GLint _Ymin;  /**< inclusive */
1855    GLint _Xmax;  /**< exclusive */
1856    GLint _Ymax;  /**< exclusive */
1857    /*@}*/
1858 };
1859
1860
1861 /**
1862  * Constants which may be overridden by device driver during context creation
1863  * but are never changed after that.
1864  */
1865 struct gl_constants
1866 {
1867    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
1868    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
1869    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
1870    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
1871    GLuint MaxTextureCoordUnits;
1872    GLuint MaxTextureImageUnits;
1873    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
1874    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
1875    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
1876    GLuint MaxArrayLockSize;
1877    GLint SubPixelBits;
1878    GLfloat MinPointSize, MaxPointSize;          /* aliased */
1879    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
1880    GLfloat PointSizeGranularity;
1881    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
1882    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
1883    GLfloat LineWidthGranularity;
1884    GLuint MaxColorTableSize;
1885    GLuint MaxConvolutionWidth;
1886    GLuint MaxConvolutionHeight;
1887    GLuint MaxClipPlanes;
1888    GLuint MaxLights;
1889    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
1890    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
1891    GLuint MaxViewportWidth, MaxViewportHeight;
1892    /* GL_ARB_vertex_program */
1893    GLuint MaxVertexProgramInstructions;
1894    GLuint MaxVertexProgramAttribs;
1895    GLuint MaxVertexProgramTemps;
1896    GLuint MaxVertexProgramLocalParams;
1897    GLuint MaxVertexProgramEnvParams;
1898    GLuint MaxVertexProgramAddressRegs;
1899    /* GL_ARB_fragment_program */
1900    GLuint MaxFragmentProgramInstructions;
1901    GLuint MaxFragmentProgramAttribs;
1902    GLuint MaxFragmentProgramTemps;
1903    GLuint MaxFragmentProgramLocalParams;
1904    GLuint MaxFragmentProgramEnvParams;
1905    GLuint MaxFragmentProgramAddressRegs;
1906    GLuint MaxFragmentProgramAluInstructions;
1907    GLuint MaxFragmentProgramTexInstructions;
1908    GLuint MaxFragmentProgramTexIndirections;
1909    /* vertex or fragment program */
1910    GLuint MaxProgramMatrices;
1911    GLuint MaxProgramMatrixStackDepth;
1912    /* vertex array / buffer object bounds checking */
1913    GLboolean CheckArrayBounds;
1914    /* GL_ARB_draw_buffers */
1915    GLuint MaxDrawBuffers;
1916 };
1917
1918
1919 /**
1920  * List of extensions.
1921  */
1922 struct gl_extensions
1923 {
1924    /**
1925     * \name Flags to quickly test if certain extensions are available.
1926     *
1927     * Not every extension needs to have such a flag, but it's encouraged.
1928     */
1929    /*@{*/
1930    GLboolean dummy;  /* don't remove this! */
1931    GLboolean ARB_depth_texture;
1932    GLboolean ARB_draw_buffers;
1933    GLboolean ARB_fragment_program;
1934    GLboolean ARB_half_float_pixel;
1935    GLboolean ARB_imaging;
1936    GLboolean ARB_multisample;
1937    GLboolean ARB_multitexture;
1938    GLboolean ARB_occlusion_query;
1939    GLboolean ARB_point_sprite;
1940    GLboolean ARB_shadow;
1941    GLboolean ARB_texture_border_clamp;
1942    GLboolean ARB_texture_compression;
1943    GLboolean ARB_texture_cube_map;
1944    GLboolean ARB_texture_env_combine;
1945    GLboolean ARB_texture_env_crossbar;
1946    GLboolean ARB_texture_env_dot3;
1947    GLboolean ARB_texture_float;
1948    GLboolean ARB_texture_mirrored_repeat;
1949    GLboolean ARB_texture_non_power_of_two;
1950    GLboolean ARB_transpose_matrix;
1951    GLboolean ARB_vertex_buffer_object;
1952    GLboolean ARB_vertex_program;
1953    GLboolean ARB_window_pos;
1954    GLboolean EXT_abgr;
1955    GLboolean EXT_bgra;
1956    GLboolean EXT_blend_color;
1957    GLboolean EXT_blend_equation_separate;
1958    GLboolean EXT_blend_func_separate;
1959    GLboolean EXT_blend_logic_op;
1960    GLboolean EXT_blend_minmax;
1961    GLboolean EXT_blend_subtract;
1962    GLboolean EXT_clip_volume_hint;
1963    GLboolean EXT_cull_vertex;
1964    GLboolean EXT_convolution;
1965    GLboolean EXT_compiled_vertex_array;
1966    GLboolean EXT_copy_texture;
1967    GLboolean EXT_depth_bounds_test;
1968    GLboolean EXT_draw_range_elements;
1969    GLboolean EXT_fog_coord;
1970    GLboolean EXT_histogram;
1971    GLboolean EXT_multi_draw_arrays;
1972    GLboolean EXT_paletted_texture;
1973    GLboolean EXT_packed_pixels;
1974    GLboolean EXT_pixel_buffer_object;
1975    GLboolean EXT_point_parameters;
1976    GLboolean EXT_polygon_offset;
1977    GLboolean EXT_rescale_normal;
1978    GLboolean EXT_shadow_funcs;
1979    GLboolean EXT_secondary_color;
1980    GLboolean EXT_separate_specular_color;
1981    GLboolean EXT_shared_texture_palette;
1982    GLboolean EXT_stencil_wrap;
1983    GLboolean EXT_stencil_two_side;
1984    GLboolean EXT_subtexture;
1985    GLboolean EXT_texture;
1986    GLboolean EXT_texture_object;
1987    GLboolean EXT_texture3D;
1988    GLboolean EXT_texture_compression_s3tc;
1989    GLboolean EXT_texture_env_add;
1990    GLboolean EXT_texture_env_combine;
1991    GLboolean EXT_texture_env_dot3;
1992    GLboolean EXT_texture_filter_anisotropic;
1993    GLboolean EXT_texture_lod_bias;
1994    GLboolean EXT_texture_mirror_clamp;
1995    GLboolean EXT_vertex_array;
1996    GLboolean EXT_vertex_array_set;
1997    /* vendor extensions */
1998    GLboolean APPLE_client_storage;
1999    GLboolean APPLE_packed_pixels;
2000    GLboolean ATI_texture_mirror_once;
2001    GLboolean ATI_texture_env_combine3;
2002    GLboolean HP_occlusion_test;
2003    GLboolean IBM_rasterpos_clip;
2004    GLboolean IBM_multimode_draw_arrays;
2005    GLboolean MESA_pack_invert;
2006    GLboolean MESA_packed_depth_stencil;
2007    GLboolean MESA_program_debug;
2008    GLboolean MESA_resize_buffers;
2009    GLboolean MESA_ycbcr_texture;
2010    GLboolean NV_blend_square;
2011    GLboolean NV_fragment_program;
2012    GLboolean NV_light_max_exponent;
2013    GLboolean NV_point_sprite;
2014    GLboolean NV_texgen_reflection;
2015    GLboolean NV_texture_rectangle;
2016    GLboolean NV_vertex_program;
2017    GLboolean NV_vertex_program1_1;
2018    GLboolean SGI_color_matrix;
2019    GLboolean SGI_color_table;
2020    GLboolean SGI_texture_color_table;
2021    GLboolean SGIS_generate_mipmap;
2022    GLboolean SGIS_pixel_texture;
2023    GLboolean SGIS_texture_edge_clamp;
2024    GLboolean SGIS_texture_lod;
2025    GLboolean SGIX_depth_texture;
2026    GLboolean SGIX_pixel_texture;
2027    GLboolean SGIX_shadow;
2028    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2029    GLboolean TDFX_texture_compression_FXT1;
2030    GLboolean S3_s3tc;
2031    /*@}*/
2032    /* The extension string */
2033    const GLubyte *String;
2034 };
2035
2036
2037 /**
2038  * A stack of matrices (projection, modelview, color, texture, etc).
2039  */
2040 struct matrix_stack
2041 {
2042    GLmatrix *Top;      /**< points into Stack */
2043    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2044    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2045    GLuint MaxDepth;    /**< size of Stack[] array */
2046    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2047 };
2048
2049
2050 /**
2051  * \name Bits for image transfer operations
2052  *
2053  * \sa __GLcontextRec::ImageTransferState.
2054  */
2055 /*@{*/
2056 #define IMAGE_SCALE_BIAS_BIT                      0x1
2057 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2058 #define IMAGE_MAP_COLOR_BIT                       0x4
2059 #define IMAGE_COLOR_TABLE_BIT                     0x8
2060 #define IMAGE_CONVOLUTION_BIT                     0x10
2061 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2062 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2063 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2064 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2065 #define IMAGE_HISTOGRAM_BIT                       0x200
2066 #define IMAGE_MIN_MAX_BIT                         0x400
2067 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2068
2069
2070 /** Transfer ops up to convolution */
2071 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2072                                     IMAGE_SHIFT_OFFSET_BIT |   \
2073                                     IMAGE_MAP_COLOR_BIT |      \
2074                                     IMAGE_COLOR_TABLE_BIT)
2075
2076 /** Transfer ops after convolution */
2077 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2078                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2079                                      IMAGE_COLOR_MATRIX_BIT |                 \
2080                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2081                                      IMAGE_HISTOGRAM_BIT |                    \
2082                                      IMAGE_MIN_MAX_BIT)
2083 /*@}*/
2084
2085
2086 /**
2087  * \name Bits to indicate what state has changed.
2088  *
2089  * 4 unused flags.
2090  */
2091 /*@{*/
2092 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2093 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2094 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2095 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2096 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2097 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2098 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2099 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2100 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2101 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2102 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2103 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2104 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2105 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2106 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2107 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2108 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2109 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2110 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2111 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2112 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2113 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2114 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2115 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2116 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2117 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2118 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2119 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2120 #define _NEW_ALL ~0
2121 /*@}*/
2122
2123
2124 /**
2125  * \name Bits to track array state changes
2126  *
2127  * Also used to summarize array enabled.
2128  */
2129 /*@{*/
2130 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2131 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2132 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2133 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2134 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2135 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2136 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
2137 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
2138 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2139 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2140 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2141 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2142 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2143 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2144 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2145 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2146 #define _NEW_ARRAY_ATTRIB_0         0x10000  /* start at bit 16 */
2147 #define _NEW_ARRAY_ALL              0xffffffff
2148
2149
2150 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2151 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2152 /*@}*/
2153
2154
2155 /**
2156  * \name A bunch of flags that we think might be useful to drivers.
2157  *
2158  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2159  */
2160 /*@{*/
2161 #define DD_FLATSHADE                0x1
2162 #define DD_SEPARATE_SPECULAR        0x2
2163 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2164 #define DD_TRI_LIGHT_TWOSIDE        0x8
2165 #define DD_TRI_UNFILLED             0x10
2166 #define DD_TRI_SMOOTH               0x20
2167 #define DD_TRI_STIPPLE              0x40
2168 #define DD_TRI_OFFSET               0x80
2169 #define DD_LINE_SMOOTH              0x100
2170 #define DD_LINE_STIPPLE             0x200
2171 #define DD_LINE_WIDTH               0x400
2172 #define DD_POINT_SMOOTH             0x800
2173 #define DD_POINT_SIZE               0x1000
2174 #define DD_POINT_ATTEN              0x2000
2175 /*@}*/
2176
2177
2178 /**
2179  * \name Define the state changes under which each of these bits might change
2180  */
2181 /*@{*/
2182 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2183 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2184 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2185 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2186 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2187 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2188 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2189 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2190 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2191 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2192 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2193 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2194 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2195 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2196 /*@}*/
2197
2198
2199 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2200                                            _NEW_TEXTURE |       \
2201                                            _NEW_POINT |         \
2202                                            _NEW_MODELVIEW)
2203
2204 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2205                                            _NEW_TEXTURE)
2206
2207 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2208
2209
2210
2211
2212 /*
2213  * Forward declaration of display list data types:
2214  */
2215 union node;
2216 typedef union node Node;
2217
2218
2219 /* This has to be included here. */
2220 #include "dd.h"
2221
2222
2223 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2224
2225 /**
2226  * Core Mesa's support for tnl modules:
2227  */
2228 struct gl_tnl_module {
2229    /**
2230     * Vertex format to be lazily swapped into current dispatch.
2231     */
2232    const GLvertexformat *Current;
2233
2234    /**
2235     * \name Record of functions swapped out.
2236     * On restore, only need to swap these functions back in.
2237     */
2238    /*@{*/
2239    void *Swapped[NUM_VERTEX_FORMAT_ENTRIES][2];
2240    GLuint SwapCount;
2241    /*@}*/
2242 };
2243
2244 struct mesa_list_state {
2245    GLuint CallDepth;            /**< Current recursion calling depth */
2246    Node *CurrentListPtr;        /**< Head of list being compiled */
2247    GLuint CurrentListNum;       /**< Number of the list being compiled */
2248    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2249    GLuint CurrentPos;           /**< Index into current block of nodes */
2250    GLvertexformat ListVtxfmt;
2251
2252    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2253    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2254
2255    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2256    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2257
2258    GLubyte ActiveIndex;
2259    GLfloat CurrentIndex;
2260
2261    GLubyte ActiveEdgeFlag;
2262    GLboolean CurrentEdgeFlag;
2263 };
2264
2265
2266 /**
2267  * Mesa context
2268  *
2269  * This is the central context data structure for Mesa.  Almost all
2270  * OpenGL state is contained in this structure.
2271  * Think of this as a base class from which device drivers will derive
2272  * sub classes.
2273  */
2274 struct __GLcontextRec {
2275    /**
2276     * \name OS related interfaces.
2277     *
2278     * These \b must be the first members of this structure, because they are
2279     * exposed to the outside world (i.e. GLX extension).
2280     */
2281    /*@{*/
2282    __GLimports imports;
2283    __GLexports exports;
2284    /*@}*/
2285
2286    /** State possibly shared with other contexts in the address space */
2287    struct gl_shared_state *Shared;
2288
2289    /** \name API function pointer tables */
2290    /*@{*/
2291    struct _glapi_table *Save;   /**< Display list save functions */
2292    struct _glapi_table *Exec;   /**< Execute functions */
2293    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2294    /*@}*/
2295
2296    GLvisual Visual;
2297    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2298    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2299
2300    /**
2301     * Device driver function pointer table
2302     */
2303    struct dd_function_table Driver;
2304
2305    void *DriverCtx;     /**< Points to device driver context/state */
2306    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2307
2308    /** Core/Driver constants */
2309    struct gl_constants Const;
2310
2311    /** \name The various 4x4 matrix stacks */
2312    /*@{*/
2313    struct matrix_stack ModelviewMatrixStack;
2314    struct matrix_stack ProjectionMatrixStack;
2315    struct matrix_stack ColorMatrixStack;
2316    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2317    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2318    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2319    /*@}*/
2320
2321    /** Combined modelview and projection matrix */
2322    GLmatrix _ModelProjectMatrix;
2323
2324    /** \name Display lists */
2325    struct mesa_list_state ListState;
2326
2327    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2328    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2329
2330    /** Extensions */
2331    struct gl_extensions Extensions;
2332
2333    /** \name Renderer attribute stack */
2334    /*@{*/
2335    GLuint AttribStackDepth;
2336    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2337    /*@}*/
2338
2339    /** \name Renderer attribute groups
2340     *
2341     * We define a struct for each attribute group to make pushing and popping
2342     * attributes easy.  Also it's a good organization.
2343     */
2344    /*@{*/
2345    struct gl_accum_attrib       Accum;          /**< Accumulation buffer attributes */
2346    struct gl_colorbuffer_attrib Color;          /**< Color buffers attributes */
2347    struct gl_current_attrib     Current;        /**< Current attributes */
2348    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2349    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2350    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2351    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2352    struct gl_light_attrib       Light;          /**< Light attributes */
2353    struct gl_line_attrib        Line;           /**< Line attributes */
2354    struct gl_list_attrib        List;           /**< List attributes */
2355    struct gl_multisample_attrib Multisample;
2356    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2357    struct gl_point_attrib       Point;          /**< Point attributes */
2358    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2359    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2360    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2361    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2362    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2363    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2364    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2365    /*@}*/
2366
2367    /** \name Other attribute groups */
2368    /*@{*/
2369    struct gl_histogram_attrib   Histogram;
2370    struct gl_minmax_attrib      MinMax;
2371    struct gl_convolution_attrib Convolution1D;
2372    struct gl_convolution_attrib Convolution2D;
2373    struct gl_convolution_attrib Separable2D;
2374    /*@}*/
2375
2376    /** \name Client attribute stack */
2377    /*@{*/
2378    GLuint ClientAttribStackDepth;
2379    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2380    /*@}*/
2381
2382    /** \name Client attribute groups */
2383    /*@{*/
2384    struct gl_array_attrib       Array;  /**< Vertex arrays */
2385    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2386    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2387    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2388
2389    struct gl_evaluators EvalMap;   /**< All evaluators */
2390    struct gl_feedback   Feedback;  /**< Feedback */
2391    struct gl_selection  Select;    /**< Selection */
2392
2393    struct gl_color_table ColorTable;       /**< Pre-convolution */
2394    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2395    struct gl_color_table PostConvolutionColorTable;
2396    struct gl_color_table ProxyPostConvolutionColorTable;
2397    struct gl_color_table PostColorMatrixColorTable;
2398    struct gl_color_table ProxyPostColorMatrixColorTable;
2399
2400    struct program_state Program;             /**< for vertex or fragment progs */
2401    struct vertex_program_state VertexProgram;      /**< GL_NV_vertex_program */
2402    struct fragment_program_state FragmentProgram;  /**< GL_NV_fragment_program */
2403
2404    struct occlusion_state Occlusion;  /**< GL_ARB_occlusion_query */
2405
2406    GLenum ErrorValue;        /**< Last error code */
2407    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2408    GLuint NewState;          /**< bitwise-or of _NEW_* flags */
2409    /*@}*/
2410
2411    /** \name Derived */
2412    /*@{*/
2413    GLuint _TriangleCaps;      /**< bitwise-or of DD_* flags */
2414    GLuint _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2415    GLfloat _EyeZDir[3];
2416    GLfloat _ModelViewInvScale;
2417    GLuint _NeedEyeCoords;
2418    GLuint _ForceEyeCoords;
2419    GLboolean _RotateMode;
2420    GLenum _CurrentProgram;    /* currently executing program */
2421
2422    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2423    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2424    /**@}*/
2425
2426    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2427
2428
2429    GLboolean OcclusionResult;       /**< for GL_HP_occlusion_test */
2430    GLboolean OcclusionResultSaved;  /**< for GL_HP_occlusion_test */
2431    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2432                     *
2433                     * We don't have a better way to communicate this value from
2434                     * swrast_setup to swrast. */
2435
2436
2437    /** \name Z buffer stuff */
2438    /*@{*/
2439    GLuint DepthMax;     /**< Max depth buffer value */
2440    GLfloat DepthMaxF;   /**< Float max depth buffer value */
2441    GLfloat MRD;         /**< minimum resolvable difference in Z values */
2442    /*@}*/
2443
2444    /** \name Color clamping (tentative part of GL_ARB_color_clamp_control) */
2445    /*@{*/
2446    GLboolean ClampFragmentColors;
2447    GLboolean ClampVertexColors;
2448    /*@}*/
2449
2450    /** \name For debugging/development only */
2451    /*@{*/
2452    GLboolean FirstTimeCurrent;
2453    /*@}*/
2454
2455    /** Dither disable via MESA_NO_DITHER env var */
2456    GLboolean NoDither;
2457
2458    /** software compression/decompression supported or not */
2459    GLboolean Mesa_DXTn;
2460
2461    /** Core tnl module support */
2462    struct gl_tnl_module TnlModule;
2463
2464    /**
2465     * \name Hooks for module contexts.
2466     *
2467     * These will eventually live in the driver or elsewhere.
2468     */
2469    /*@{*/
2470    void *swrast_context;
2471    void *swsetup_context;
2472    void *swtnl_context;
2473    void *swtnl_im;
2474    void *acache_context;
2475    void *aelt_context;
2476    /*@}*/
2477 };
2478
2479
2480 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2481 extern const char *_mesa_prim_name[GL_POLYGON+4];
2482
2483
2484 #ifdef MESA_DEBUG
2485 extern int MESA_VERBOSE;
2486 extern int MESA_DEBUG_FLAGS;
2487 # define MESA_FUNCTION __FUNCTION__
2488 #else
2489 # define MESA_VERBOSE 0
2490 # define MESA_DEBUG_FLAGS 0
2491 # define MESA_FUNCTION "a function"
2492 # ifndef NDEBUG
2493 #  define NDEBUG
2494 # endif
2495 #endif
2496
2497
2498 enum _verbose {
2499    VERBOSE_VARRAY               = 0x0001,
2500    VERBOSE_TEXTURE              = 0x0002,
2501    VERBOSE_IMMEDIATE            = 0x0004,
2502    VERBOSE_PIPELINE             = 0x0008,
2503    VERBOSE_DRIVER               = 0x0010,
2504    VERBOSE_STATE                = 0x0020,
2505    VERBOSE_API                  = 0x0040,
2506    VERBOSE_DISPLAY_LIST         = 0x0100,
2507    VERBOSE_LIGHTING             = 0x0200,
2508    VERBOSE_PRIMS                = 0x0400,
2509    VERBOSE_VERTS                = 0x0800
2510 };
2511
2512
2513 enum _debug {
2514    DEBUG_ALWAYS_FLUSH           = 0x1
2515 };
2516
2517
2518
2519 #define Elements(x) sizeof(x)/sizeof(*(x))
2520
2521
2522 #endif /* TYPES_H */