src/mesa/main/mtypes.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.3
   4  *
   5  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 1999-2008  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file mtypes.h
  28  * Main Mesa data structures.
  29  *
  30  * Please try to mark derived values with a leading underscore ('_').
  31  */
  32
  33 #ifndef TYPES_H
  34 #define TYPES_H
  35
  36
  37 #include "glheader.h"
  38 #include <GL/internal/glcore.h> /* __GLcontextModes (GLvisual) */
  39 #include "config.h"             /* Hardwired parameters */
  40 #include "glapi/glapi.h"
  41 #include "math/m_matrix.h"      /* GLmatrix */
  42 #include "bitset.h"
  43
  44
  45 /**
  46  * Special, internal token
  47  */
  48 #define GL_SHADER_PROGRAM_MESA 0x9999
  49
  50
  51 /**
  52  * Color channel data type.
  53  */
  54 #if CHAN_BITS == 8
  55    typedef GLubyte GLchan;
  56 #define CHAN_MAX 255
  57 #define CHAN_MAXF 255.0F
  58 #define CHAN_TYPE GL_UNSIGNED_BYTE
  59 #elif CHAN_BITS == 16
  60    typedef GLushort GLchan;
  61 #define CHAN_MAX 65535
  62 #define CHAN_MAXF 65535.0F
  63 #define CHAN_TYPE GL_UNSIGNED_SHORT
  64 #elif CHAN_BITS == 32
  65    typedef GLfloat GLchan;
  66 #define CHAN_MAX 1.0
  67 #define CHAN_MAXF 1.0F
  68 #define CHAN_TYPE GL_FLOAT
  69 #else
  70 #error "illegal number of color channel bits"
  71 #endif
  72
  73
  74 /**
  75  * Stencil buffer data type.
  76  */
  77 #if STENCIL_BITS==8
  78    typedef GLubyte GLstencil;
  79 #elif STENCIL_BITS==16
  80    typedef GLushort GLstencil;
  81 #else
  82 #  error "illegal number of stencil bits"
  83 #endif
  84
  85
  86 /**
  87  * Fixed point data type.
  88  */
  89 typedef int GLfixed;
  90 /*
  91  * Fixed point arithmetic macros
  92  */
  93 #ifndef FIXED_FRAC_BITS
  94 #define FIXED_FRAC_BITS 11
  95 #endif
  96
  97 #define FIXED_SHIFT     FIXED_FRAC_BITS
  98 #define FIXED_ONE       (1 << FIXED_SHIFT)
  99 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
 100 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
 101 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
 102 #define FIXED_EPSILON   1
 103 #define FIXED_SCALE     ((float) FIXED_ONE)
 104 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 105 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 106 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 107 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 108 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 109 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 110 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 111 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 112 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 113 #define PosFloatToFixed(X)      FloatToFixed(X)
 114 #define SignedFloatToFixed(X)   FloatToFixed(X)
 115
 116
 117
 118 /**
 119  * \name Some forward type declarations
 120  */
 121 /*@{*/
 122 struct _mesa_HashTable;
 123 struct gl_pixelstore_attrib;
 124 struct gl_program_cache;
 125 struct gl_texture_format;
 126 struct gl_texture_image;
 127 struct gl_texture_object;
 128 struct st_context;
 129 struct pipe_surface;
 130 typedef struct __GLcontextRec GLcontext;
 131 typedef struct __GLcontextModesRec GLvisual;
 132 typedef struct gl_framebuffer GLframebuffer;
 133 /*@}*/
 134
 135
 136
 137 /**
 138  * Indexes for vertex program attributes.
 139  * GL_NV_vertex_program aliases generic attributes over the conventional
 140  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 141  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 142  * generic attributes are distinct/separate).
 143  */
 144 enum
 145 {
 146    VERT_ATTRIB_POS = 0,
 147    VERT_ATTRIB_WEIGHT = 1,
 148    VERT_ATTRIB_NORMAL = 2,
 149    VERT_ATTRIB_COLOR0 = 3,
 150    VERT_ATTRIB_COLOR1 = 4,
 151    VERT_ATTRIB_FOG = 5,
 152    VERT_ATTRIB_COLOR_INDEX = 6,
 153    VERT_ATTRIB_POINT_SIZE = 6,  /*alias*/
 154    VERT_ATTRIB_EDGEFLAG = 7,
 155    VERT_ATTRIB_TEX0 = 8,
 156    VERT_ATTRIB_TEX1 = 9,
 157    VERT_ATTRIB_TEX2 = 10,
 158    VERT_ATTRIB_TEX3 = 11,
 159    VERT_ATTRIB_TEX4 = 12,
 160    VERT_ATTRIB_TEX5 = 13,
 161    VERT_ATTRIB_TEX6 = 14,
 162    VERT_ATTRIB_TEX7 = 15,
 163    VERT_ATTRIB_GENERIC0 = 16,
 164    VERT_ATTRIB_GENERIC1 = 17,
 165    VERT_ATTRIB_GENERIC2 = 18,
 166    VERT_ATTRIB_GENERIC3 = 19,
 167    VERT_ATTRIB_GENERIC4 = 20,
 168    VERT_ATTRIB_GENERIC5 = 21,
 169    VERT_ATTRIB_GENERIC6 = 22,
 170    VERT_ATTRIB_GENERIC7 = 23,
 171    VERT_ATTRIB_GENERIC8 = 24,
 172    VERT_ATTRIB_GENERIC9 = 25,
 173    VERT_ATTRIB_GENERIC10 = 26,
 174    VERT_ATTRIB_GENERIC11 = 27,
 175    VERT_ATTRIB_GENERIC12 = 28,
 176    VERT_ATTRIB_GENERIC13 = 29,
 177    VERT_ATTRIB_GENERIC14 = 30,
 178    VERT_ATTRIB_GENERIC15 = 31,
 179    VERT_ATTRIB_MAX = 32
 180 };
 181
 182 /**
 183  * Bitflags for vertex attributes.
 184  * These are used in bitfields in many places.
 185  */
 186 /*@{*/
 187 #define VERT_BIT_POS         (1 << VERT_ATTRIB_POS)
 188 #define VERT_BIT_WEIGHT      (1 << VERT_ATTRIB_WEIGHT)
 189 #define VERT_BIT_NORMAL      (1 << VERT_ATTRIB_NORMAL)
 190 #define VERT_BIT_COLOR0      (1 << VERT_ATTRIB_COLOR0)
 191 #define VERT_BIT_COLOR1      (1 << VERT_ATTRIB_COLOR1)
 192 #define VERT_BIT_FOG         (1 << VERT_ATTRIB_FOG)
 193 #define VERT_BIT_COLOR_INDEX (1 << VERT_ATTRIB_COLOR_INDEX)
 194 #define VERT_BIT_EDGEFLAG    (1 << VERT_ATTRIB_EDGEFLAG)
 195 #define VERT_BIT_TEX0        (1 << VERT_ATTRIB_TEX0)
 196 #define VERT_BIT_TEX1        (1 << VERT_ATTRIB_TEX1)
 197 #define VERT_BIT_TEX2        (1 << VERT_ATTRIB_TEX2)
 198 #define VERT_BIT_TEX3        (1 << VERT_ATTRIB_TEX3)
 199 #define VERT_BIT_TEX4        (1 << VERT_ATTRIB_TEX4)
 200 #define VERT_BIT_TEX5        (1 << VERT_ATTRIB_TEX5)
 201 #define VERT_BIT_TEX6        (1 << VERT_ATTRIB_TEX6)
 202 #define VERT_BIT_TEX7        (1 << VERT_ATTRIB_TEX7)
 203 #define VERT_BIT_GENERIC0    (1 << VERT_ATTRIB_GENERIC0)
 204 #define VERT_BIT_GENERIC1    (1 << VERT_ATTRIB_GENERIC1)
 205 #define VERT_BIT_GENERIC2    (1 << VERT_ATTRIB_GENERIC2)
 206 #define VERT_BIT_GENERIC3    (1 << VERT_ATTRIB_GENERIC3)
 207 #define VERT_BIT_GENERIC4    (1 << VERT_ATTRIB_GENERIC4)
 208 #define VERT_BIT_GENERIC5    (1 << VERT_ATTRIB_GENERIC5)
 209 #define VERT_BIT_GENERIC6    (1 << VERT_ATTRIB_GENERIC6)
 210 #define VERT_BIT_GENERIC7    (1 << VERT_ATTRIB_GENERIC7)
 211 #define VERT_BIT_GENERIC8    (1 << VERT_ATTRIB_GENERIC8)
 212 #define VERT_BIT_GENERIC9    (1 << VERT_ATTRIB_GENERIC9)
 213 #define VERT_BIT_GENERIC10   (1 << VERT_ATTRIB_GENERIC10)
 214 #define VERT_BIT_GENERIC11   (1 << VERT_ATTRIB_GENERIC11)
 215 #define VERT_BIT_GENERIC12   (1 << VERT_ATTRIB_GENERIC12)
 216 #define VERT_BIT_GENERIC13   (1 << VERT_ATTRIB_GENERIC13)
 217 #define VERT_BIT_GENERIC14   (1 << VERT_ATTRIB_GENERIC14)
 218 #define VERT_BIT_GENERIC15   (1 << VERT_ATTRIB_GENERIC15)
 219
 220 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 221 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 222 /*@}*/
 223
 224
 225 /**
 226  * Indexes for vertex program result attributes
 227  */
 228 /*@{*/
 229 #define VERT_RESULT_HPOS 0
 230 #define VERT_RESULT_COL0 1
 231 #define VERT_RESULT_COL1 2
 232 #define VERT_RESULT_FOGC 3
 233 #define VERT_RESULT_TEX0 4
 234 #define VERT_RESULT_TEX1 5
 235 #define VERT_RESULT_TEX2 6
 236 #define VERT_RESULT_TEX3 7
 237 #define VERT_RESULT_TEX4 8
 238 #define VERT_RESULT_TEX5 9
 239 #define VERT_RESULT_TEX6 10
 240 #define VERT_RESULT_TEX7 11
 241 #define VERT_RESULT_PSIZ 12
 242 #define VERT_RESULT_BFC0 13
 243 #define VERT_RESULT_BFC1 14
 244 #define VERT_RESULT_EDGE 15
 245 #define VERT_RESULT_VAR0 16  /**< shader varying */
 246 #define VERT_RESULT_MAX  (VERT_RESULT_VAR0 + MAX_VARYING)
 247 /*@}*/
 248
 249
 250 /**
 251  * Indexes for fragment program input attributes.
 252  */
 253 enum
 254 {
 255    FRAG_ATTRIB_WPOS = 0,
 256    FRAG_ATTRIB_COL0 = 1,
 257    FRAG_ATTRIB_COL1 = 2,
 258    FRAG_ATTRIB_FOGC = 3,
 259    FRAG_ATTRIB_TEX0 = 4,
 260    FRAG_ATTRIB_TEX1 = 5,
 261    FRAG_ATTRIB_TEX2 = 6,
 262    FRAG_ATTRIB_TEX3 = 7,
 263    FRAG_ATTRIB_TEX4 = 8,
 264    FRAG_ATTRIB_TEX5 = 9,
 265    FRAG_ATTRIB_TEX6 = 10,
 266    FRAG_ATTRIB_TEX7 = 11,
 267    FRAG_ATTRIB_VAR0 = 12,  /**< shader varying */
 268    FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + MAX_VARYING)
 269 };
 270
 271 /**
 272  * Bitflags for fragment program input attributes.
 273  */
 274 /*@{*/
 275 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 276 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 277 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 278 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 279 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 280 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 281 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 282 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 283 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 284 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 285 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 286 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 287 #define FRAG_BIT_VAR0  (1 << FRAG_ATTRIB_VAR0)
 288
 289 #define FRAG_BIT_TEX(U)  (FRAG_BIT_TEX0 << (U))
 290 #define FRAG_BIT_VAR(V)  (FRAG_BIT_VAR0 << (V))
 291
 292 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 293                            FRAG_BIT_TEX1|       \
 294                            FRAG_BIT_TEX2|       \
 295                            FRAG_BIT_TEX3|       \
 296                            FRAG_BIT_TEX4|       \
 297                            FRAG_BIT_TEX5|       \
 298                            FRAG_BIT_TEX6|       \
 299                            FRAG_BIT_TEX7)
 300 /*@}*/
 301
 302
 303 /**
 304  * Fragment program results
 305  */
 306 enum
 307 {
 308    FRAG_RESULT_COLR = 0,
 309    FRAG_RESULT_COLH = 1,
 310    FRAG_RESULT_DEPR = 2,
 311    FRAG_RESULT_DATA0 = 3,
 312    FRAG_RESULT_MAX = (FRAG_RESULT_DATA0 + MAX_DRAW_BUFFERS)
 313 };
 314
 315
 316 /**
 317  * Indexes for all renderbuffers
 318  */
 319 enum {
 320    BUFFER_FRONT_LEFT  = 0,  /* the four standard color buffers */
 321    BUFFER_BACK_LEFT   = 1,
 322    BUFFER_FRONT_RIGHT = 2,
 323    BUFFER_BACK_RIGHT  = 3,
 324    BUFFER_AUX0        = 4,  /* optional aux buffer */
 325    BUFFER_AUX1        = 5,
 326    BUFFER_AUX2        = 6,
 327    BUFFER_AUX3        = 7,
 328    BUFFER_DEPTH       = 8,
 329    BUFFER_STENCIL     = 9,
 330    BUFFER_ACCUM       = 10,
 331    BUFFER_COLOR0      = 11, /* generic renderbuffers */
 332    BUFFER_COLOR1      = 12,
 333    BUFFER_COLOR2      = 13,
 334    BUFFER_COLOR3      = 14,
 335    BUFFER_COLOR4      = 15,
 336    BUFFER_COLOR5      = 16,
 337    BUFFER_COLOR6      = 17,
 338    BUFFER_COLOR7      = 18,
 339    BUFFER_COUNT       = 19
 340 };
 341
 342 /**
 343  * Bit flags for all renderbuffers
 344  */
 345 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 346 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 347 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 348 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 349 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 350 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 351 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 352 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 353 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 354 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 355 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 356 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 357 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 358 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 359 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 360 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 361 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 362 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 363 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 364
 365 /**
 366  * Mask of all the color buffer bits (but not accum).
 367  */
 368 #define BUFFER_BITS_COLOR  (BUFFER_BIT_FRONT_LEFT | \
 369                             BUFFER_BIT_BACK_LEFT | \
 370                             BUFFER_BIT_FRONT_RIGHT | \
 371                             BUFFER_BIT_BACK_RIGHT | \
 372                             BUFFER_BIT_AUX0 | \
 373                             BUFFER_BIT_AUX1 | \
 374                             BUFFER_BIT_AUX2 | \
 375                             BUFFER_BIT_AUX3 | \
 376                             BUFFER_BIT_COLOR0 | \
 377                             BUFFER_BIT_COLOR1 | \
 378                             BUFFER_BIT_COLOR2 | \
 379                             BUFFER_BIT_COLOR3 | \
 380                             BUFFER_BIT_COLOR4 | \
 381                             BUFFER_BIT_COLOR5 | \
 382                             BUFFER_BIT_COLOR6 | \
 383                             BUFFER_BIT_COLOR7)
 384
 385
 386 /** The pixel transfer path has three color tables: */
 387 /*@{*/
 388 #define COLORTABLE_PRECONVOLUTION  0
 389 #define COLORTABLE_POSTCONVOLUTION 1
 390 #define COLORTABLE_POSTCOLORMATRIX 2
 391 #define COLORTABLE_MAX 3
 392 /*@}*/
 393
 394
 395 /**
 396  * Data structure for color tables
 397  */
 398 struct gl_color_table
 399 {
 400    GLenum InternalFormat;      /**< The user-specified format */
 401    GLenum _BaseFormat;         /**< GL_ALPHA, GL_RGBA, GL_RGB, etc */
 402    GLuint Size;                /**< number of entries in table */
 403    GLfloat *TableF;            /**< Color table, floating point values */
 404    GLubyte *TableUB;           /**< Color table, ubyte values */
 405    GLubyte RedSize;
 406    GLubyte GreenSize;
 407    GLubyte BlueSize;
 408    GLubyte AlphaSize;
 409    GLubyte LuminanceSize;
 410    GLubyte IntensitySize;
 411 };
 412
 413
 414 /**
 415  * \name Bit flags used for updating material values.
 416  */
 417 /*@{*/
 418 #define MAT_ATTRIB_FRONT_AMBIENT           0
 419 #define MAT_ATTRIB_BACK_AMBIENT            1
 420 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 421 #define MAT_ATTRIB_BACK_DIFFUSE            3
 422 #define MAT_ATTRIB_FRONT_SPECULAR          4
 423 #define MAT_ATTRIB_BACK_SPECULAR           5
 424 #define MAT_ATTRIB_FRONT_EMISSION          6
 425 #define MAT_ATTRIB_BACK_EMISSION           7
 426 #define MAT_ATTRIB_FRONT_SHININESS         8
 427 #define MAT_ATTRIB_BACK_SHININESS          9
 428 #define MAT_ATTRIB_FRONT_INDEXES           10
 429 #define MAT_ATTRIB_BACK_INDEXES            11
 430 #define MAT_ATTRIB_MAX                     12
 431
 432 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 433 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 434 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 435 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 436 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 437 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 438
 439 #define MAT_INDEX_AMBIENT  0
 440 #define MAT_INDEX_DIFFUSE  1
 441 #define MAT_INDEX_SPECULAR 2
 442
 443 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 444 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 445 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 446 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 447 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 448 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 449 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 450 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 451 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 452 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 453 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 454 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 455
 456
 457 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 458                                  MAT_BIT_FRONT_AMBIENT |        \
 459                                  MAT_BIT_FRONT_DIFFUSE |        \
 460                                  MAT_BIT_FRONT_SPECULAR |       \
 461                                  MAT_BIT_FRONT_SHININESS |      \
 462                                  MAT_BIT_FRONT_INDEXES)
 463
 464 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 465                                  MAT_BIT_BACK_AMBIENT |         \
 466                                  MAT_BIT_BACK_DIFFUSE |         \
 467                                  MAT_BIT_BACK_SPECULAR |        \
 468                                  MAT_BIT_BACK_SHININESS |       \
 469                                  MAT_BIT_BACK_INDEXES)
 470
 471 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 472 /*@}*/
 473
 474
 475 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 476 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 477
 478 /**
 479  * Material shininess lookup table.
 480  */
 481 struct gl_shine_tab
 482 {
 483    struct gl_shine_tab *next, *prev;
 484    GLfloat tab[SHINE_TABLE_SIZE+1];
 485    GLfloat shininess;
 486    GLuint refcount;
 487 };
 488
 489
 490 /**
 491  * Light source state.
 492  */
 493 struct gl_light
 494 {
 495    struct gl_light *next;       /**< double linked list with sentinel */
 496    struct gl_light *prev;
 497
 498    GLfloat Ambient[4];          /**< ambient color */
 499    GLfloat Diffuse[4];          /**< diffuse color */
 500    GLfloat Specular[4];         /**< specular color */
 501    GLfloat EyePosition[4];      /**< position in eye coordinates */
 502    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 503    GLfloat SpotExponent;
 504    GLfloat SpotCutoff;          /**< in degrees */
 505    GLfloat _CosCutoffNeg;       /**< = cos(SpotCutoff) */
 506    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 507    GLfloat ConstantAttenuation;
 508    GLfloat LinearAttenuation;
 509    GLfloat QuadraticAttenuation;
 510    GLboolean Enabled;           /**< On/off flag */
 511
 512    /**
 513     * \name Derived fields
 514     */
 515    /*@{*/
 516    GLbitfield _Flags;           /**< State */
 517
 518    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 519    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 520    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 521    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 522    GLfloat _VP_inf_spot_attenuation;
 523
 524    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 525    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 526    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 527    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 528    GLfloat _dli;                /**< CI diffuse light intensity */
 529    GLfloat _sli;                /**< CI specular light intensity */
 530    /*@}*/
 531 };
 532
 533
 534 /**
 535  * Light model state.
 536  */
 537 struct gl_lightmodel
 538 {
 539    GLfloat Ambient[4];          /**< ambient color */
 540    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 541    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 542    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 543                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 544 };
 545
 546
 547 /**
 548  * Material state.
 549  */
 550 struct gl_material
 551 {
 552    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 553 };
 554
 555
 556 /**
 557  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 558  */
 559 struct gl_accum_attrib
 560 {
 561    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 562 };
 563
 564
 565 /**
 566  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 567  */
 568 struct gl_colorbuffer_attrib
 569 {
 570    GLuint ClearIndex;                   /**< Index to use for glClear */
 571    GLclampf ClearColor[4];              /**< Color to use for glClear */
 572
 573    GLuint IndexMask;                    /**< Color index write mask */
 574    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 575
 576    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 577
 578    /**
 579     * \name alpha testing
 580     */
 581    /*@{*/
 582    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 583    GLenum AlphaFunc;                    /**< Alpha test function */
 584    GLclampf AlphaRef;                   /**< Alpha reference value */
 585    /*@}*/
 586
 587    /**
 588     * \name Blending
 589     */
 590    /*@{*/
 591    GLboolean BlendEnabled;              /**< Blending enabled flag */
 592    GLenum BlendSrcRGB;                  /**< Blending source operator */
 593    GLenum BlendDstRGB;                  /**< Blending destination operator */
 594    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 595    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 596    GLenum BlendEquationRGB;             /**< Blending equation */
 597    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 598    GLfloat BlendColor[4];               /**< Blending color */
 599    /*@}*/
 600
 601    /**
 602     * \name Logic op
 603     */
 604    /*@{*/
 605    GLenum LogicOp;                      /**< Logic operator */
 606    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 607    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 608    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 609    /*@}*/
 610
 611    GLboolean DitherFlag;                /**< Dither enable flag */
 612
 613    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 614    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 615 };
 616
 617
 618 /**
 619  * Current attribute group (GL_CURRENT_BIT).
 620  */
 621 struct gl_current_attrib
 622 {
 623    /**
 624     * \name Current vertex attributes.
 625     * \note Values are valid only after FLUSH_VERTICES has been called.
 626     * \note Index and Edgeflag current values are stored as floats in the
 627     * SIX and SEVEN attribute slots.
 628     */
 629    /*@{*/
 630    GLfloat Attrib[VERT_ATTRIB_MAX][4];  /**< Position, color, texcoords, etc */
 631    /*@}*/
 632
 633    /**
 634     * \name Current raster position attributes (always valid).
 635     * \note This set of attributes is very similar to the SWvertex struct.
 636     */
 637    /*@{*/
 638    GLfloat RasterPos[4];
 639    GLfloat RasterDistance;
 640    GLfloat RasterColor[4];
 641    GLfloat RasterSecondaryColor[4];
 642    GLfloat RasterIndex;
 643    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];
 644    GLboolean RasterPosValid;
 645    /*@}*/
 646 };
 647
 648
 649 /**
 650  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 651  */
 652 struct gl_depthbuffer_attrib
 653 {
 654    GLenum Func;                 /**< Function for depth buffer compare */
 655    GLclampd Clear;              /**< Value to clear depth buffer to */
 656    GLboolean Test;              /**< Depth buffering enabled flag */
 657    GLboolean Mask;              /**< Depth buffer writable? */
 658    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 659    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 660 };
 661
 662
 663 /**
 664  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
 665  */
 666 struct gl_enable_attrib
 667 {
 668    GLboolean AlphaTest;
 669    GLboolean AutoNormal;
 670    GLboolean Blend;
 671    GLbitfield ClipPlanes;
 672    GLboolean ColorMaterial;
 673    GLboolean ColorTable[COLORTABLE_MAX];
 674    GLboolean Convolution1D;
 675    GLboolean Convolution2D;
 676    GLboolean Separable2D;
 677    GLboolean CullFace;
 678    GLboolean DepthTest;
 679    GLboolean Dither;
 680    GLboolean Fog;
 681    GLboolean Histogram;
 682    GLboolean Light[MAX_LIGHTS];
 683    GLboolean Lighting;
 684    GLboolean LineSmooth;
 685    GLboolean LineStipple;
 686    GLboolean IndexLogicOp;
 687    GLboolean ColorLogicOp;
 688    GLboolean Map1Color4;
 689    GLboolean Map1Index;
 690    GLboolean Map1Normal;
 691    GLboolean Map1TextureCoord1;
 692    GLboolean Map1TextureCoord2;
 693    GLboolean Map1TextureCoord3;
 694    GLboolean Map1TextureCoord4;
 695    GLboolean Map1Vertex3;
 696    GLboolean Map1Vertex4;
 697    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 698    GLboolean Map2Color4;
 699    GLboolean Map2Index;
 700    GLboolean Map2Normal;
 701    GLboolean Map2TextureCoord1;
 702    GLboolean Map2TextureCoord2;
 703    GLboolean Map2TextureCoord3;
 704    GLboolean Map2TextureCoord4;
 705    GLboolean Map2Vertex3;
 706    GLboolean Map2Vertex4;
 707    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 708    GLboolean MinMax;
 709    GLboolean Normalize;
 710    GLboolean PixelTexture;
 711    GLboolean PointSmooth;
 712    GLboolean PolygonOffsetPoint;
 713    GLboolean PolygonOffsetLine;
 714    GLboolean PolygonOffsetFill;
 715    GLboolean PolygonSmooth;
 716    GLboolean PolygonStipple;
 717    GLboolean RescaleNormals;
 718    GLboolean Scissor;
 719    GLboolean Stencil;
 720    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 721    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 722    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 723    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 724    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 725    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 726    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 727    GLuint Texture[MAX_TEXTURE_UNITS];
 728    GLuint TexGen[MAX_TEXTURE_UNITS];
 729    /* SGI_texture_color_table */
 730    GLboolean TextureColorTable[MAX_TEXTURE_UNITS];
 731    /* GL_ARB_vertex_program / GL_NV_vertex_program */
 732    GLboolean VertexProgram;
 733    GLboolean VertexProgramPointSize;
 734    GLboolean VertexProgramTwoSide;
 735    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 736    GLboolean PointSprite;
 737    GLboolean FragmentShaderATI;
 738 };
 739
 740
 741 /**
 742  * Evaluator attribute group (GL_EVAL_BIT).
 743  */
 744 struct gl_eval_attrib
 745 {
 746    /**
 747     * \name Enable bits
 748     */
 749    /*@{*/
 750    GLboolean Map1Color4;
 751    GLboolean Map1Index;
 752    GLboolean Map1Normal;
 753    GLboolean Map1TextureCoord1;
 754    GLboolean Map1TextureCoord2;
 755    GLboolean Map1TextureCoord3;
 756    GLboolean Map1TextureCoord4;
 757    GLboolean Map1Vertex3;
 758    GLboolean Map1Vertex4;
 759    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 760    GLboolean Map2Color4;
 761    GLboolean Map2Index;
 762    GLboolean Map2Normal;
 763    GLboolean Map2TextureCoord1;
 764    GLboolean Map2TextureCoord2;
 765    GLboolean Map2TextureCoord3;
 766    GLboolean Map2TextureCoord4;
 767    GLboolean Map2Vertex3;
 768    GLboolean Map2Vertex4;
 769    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 770    GLboolean AutoNormal;
 771    /*@}*/
 772
 773    /**
 774     * \name Map Grid endpoints and divisions and calculated du values
 775     */
 776    /*@{*/
 777    GLint MapGrid1un;
 778    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 779    GLint MapGrid2un, MapGrid2vn;
 780    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 781    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 782    /*@}*/
 783 };
 784
 785
 786 /**
 787  * Fog attribute group (GL_FOG_BIT).
 788  */
 789 struct gl_fog_attrib
 790 {
 791    GLboolean Enabled;           /**< Fog enabled flag */
 792    GLfloat Color[4];            /**< Fog color */
 793    GLfloat Density;             /**< Density >= 0.0 */
 794    GLfloat Start;               /**< Start distance in eye coords */
 795    GLfloat End;                 /**< End distance in eye coords */
 796    GLfloat Index;               /**< Fog index */
 797    GLenum Mode;                 /**< Fog mode */
 798    GLboolean ColorSumEnabled;
 799    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 800    GLfloat _Scale;              /**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
 801 };
 802
 803
 804 /**
 805  * Hint attribute group (GL_HINT_BIT).
 806  *
 807  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 808  */
 809 struct gl_hint_attrib
 810 {
 811    GLenum PerspectiveCorrection;
 812    GLenum PointSmooth;
 813    GLenum LineSmooth;
 814    GLenum PolygonSmooth;
 815    GLenum Fog;
 816    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 817    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 818    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 819    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 820 };
 821
 822
 823 /**
 824  * Histogram attributes.
 825  */
 826 struct gl_histogram_attrib
 827 {
 828    GLuint Width;                                /**< number of table entries */
 829    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 830    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 831    GLboolean Sink;                              /**< terminate image transfer? */
 832    GLubyte RedSize;                             /**< Bits per counter */
 833    GLubyte GreenSize;
 834    GLubyte BlueSize;
 835    GLubyte AlphaSize;
 836    GLubyte LuminanceSize;
 837 };
 838
 839
 840 /**
 841  * Color Min/max state.
 842  */
 843 struct gl_minmax_attrib
 844 {
 845    GLenum Format;
 846    GLboolean Sink;
 847    GLfloat Min[4], Max[4];   /**< RGBA */
 848 };
 849
 850
 851 /**
 852  * Image convolution state.
 853  */
 854 struct gl_convolution_attrib
 855 {
 856    GLenum Format;
 857    GLenum InternalFormat;
 858    GLuint Width;
 859    GLuint Height;
 860    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 861 };
 862
 863
 864 /**
 865  * Light state flags.
 866  */
 867 /*@{*/
 868 #define LIGHT_SPOT         0x1
 869 #define LIGHT_LOCAL_VIEWER 0x2
 870 #define LIGHT_POSITIONAL   0x4
 871 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 872 /*@}*/
 873
 874
 875 /**
 876  * Lighting attribute group (GL_LIGHT_BIT).
 877  */
 878 struct gl_light_attrib
 879 {
 880    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 881    struct gl_lightmodel Model;          /**< Lighting model */
 882
 883    /**
 884     * Must flush FLUSH_VERTICES before referencing:
 885     */
 886    /*@{*/
 887    struct gl_material Material;         /**< Includes front & back values */
 888    /*@}*/
 889
 890    GLboolean Enabled;                   /**< Lighting enabled flag */
 891    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 892    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 893    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 894    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 895    GLboolean ColorMaterialEnabled;
 896    GLenum ClampVertexColor;
 897
 898    struct gl_light EnabledList;         /**< List sentinel */
 899
 900    /**
 901     * Derived state for optimizations:
 902     */
 903    /*@{*/
 904    GLboolean _NeedEyeCoords;
 905    GLboolean _NeedVertices;             /**< Use fast shader? */
 906    GLbitfield  _Flags;                  /**< LIGHT_* flags, see above */
 907    GLfloat _BaseColor[2][3];
 908    /*@}*/
 909 };
 910
 911
 912 /**
 913  * Line attribute group (GL_LINE_BIT).
 914  */
 915 struct gl_line_attrib
 916 {
 917    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 918    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 919    GLushort StipplePattern;     /**< Stipple pattern */
 920    GLint StippleFactor;         /**< Stipple repeat factor */
 921    GLfloat Width;               /**< Line width */
 922 };
 923
 924
 925 /**
 926  * Display list attribute group (GL_LIST_BIT).
 927  */
 928 struct gl_list_attrib
 929 {
 930    GLuint ListBase;
 931 };
 932
 933
 934 /**
 935  * Used by device drivers to hook new commands into display lists.
 936  */
 937 struct gl_list_instruction
 938 {
 939    GLuint Size;
 940    void (*Execute)( GLcontext *ctx, void *data );
 941    void (*Destroy)( GLcontext *ctx, void *data );
 942    void (*Print)( GLcontext *ctx, void *data );
 943 };
 944
 945 #define MAX_DLIST_EXT_OPCODES 16
 946
 947 /**
 948  * Used by device drivers to hook new commands into display lists.
 949  */
 950 struct gl_list_extensions
 951 {
 952    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 953    GLuint NumOpcodes;
 954 };
 955
 956
 957 /**
 958  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 959  */
 960 struct gl_multisample_attrib
 961 {
 962    GLboolean Enabled;
 963    GLboolean _Enabled;   /**< true if Enabled and multisample buffer */
 964    GLboolean SampleAlphaToCoverage;
 965    GLboolean SampleAlphaToOne;
 966    GLboolean SampleCoverage;
 967    GLfloat SampleCoverageValue;
 968    GLboolean SampleCoverageInvert;
 969 };
 970
 971
 972 /**
 973  * A pixelmap (see glPixelMap)
 974  */
 975 struct gl_pixelmap
 976 {
 977    GLint Size;
 978    GLfloat Map[MAX_PIXEL_MAP_TABLE];
 979    GLubyte Map8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 980 };
 981
 982
 983 /**
 984  * Collection of all pixelmaps
 985  */
 986 struct gl_pixelmaps
 987 {
 988    struct gl_pixelmap RtoR;  /**< i.e. GL_PIXEL_MAP_R_TO_R */
 989    struct gl_pixelmap GtoG;
 990    struct gl_pixelmap BtoB;
 991    struct gl_pixelmap AtoA;
 992    struct gl_pixelmap ItoR;
 993    struct gl_pixelmap ItoG;
 994    struct gl_pixelmap ItoB;
 995    struct gl_pixelmap ItoA;
 996    struct gl_pixelmap ItoI;
 997    struct gl_pixelmap StoS;
 998 };
 999
1000
1001 /**
1002  * Pixel attribute group (GL_PIXEL_MODE_BIT).
1003  */
1004 struct gl_pixel_attrib
1005 {
1006    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
1007
1008    /*--- Begin Pixel Transfer State ---*/
1009    /* Fields are in the order in which they're applied... */
1010
1011    /* Scale & Bias (index shift, offset) */
1012    GLfloat RedBias, RedScale;
1013    GLfloat GreenBias, GreenScale;
1014    GLfloat BlueBias, BlueScale;
1015    GLfloat AlphaBias, AlphaScale;
1016    GLfloat DepthBias, DepthScale;
1017    GLint IndexShift, IndexOffset;
1018
1019    /* Pixel Maps */
1020    /* Note: actual pixel maps are not part of this attrib group */
1021    GLboolean MapColorFlag;
1022    GLboolean MapStencilFlag;
1023
1024    /* There are multiple color table stages: */
1025    GLboolean ColorTableEnabled[COLORTABLE_MAX];
1026    GLfloat ColorTableScale[COLORTABLE_MAX][4];  /**< RGBA */
1027    GLfloat ColorTableBias[COLORTABLE_MAX][4];   /**< RGBA */
1028
1029    /* Convolution (GL_EXT_convolution) */
1030    GLboolean Convolution1DEnabled;
1031    GLboolean Convolution2DEnabled;
1032    GLboolean Separable2DEnabled;
1033    GLfloat ConvolutionBorderColor[3][4];
1034    GLenum ConvolutionBorderMode[3];
1035    GLfloat ConvolutionFilterScale[3][4];  /**< RGBA */
1036    GLfloat ConvolutionFilterBias[3][4];   /**< RGBA */
1037    GLfloat PostConvolutionScale[4];  /**< RGBA */
1038    GLfloat PostConvolutionBias[4];   /**< RGBA */
1039
1040    /* Color matrix (GL_SGI_color_matrix) */
1041    /* Note: the color matrix is not part of this attrib group */
1042    GLfloat PostColorMatrixScale[4];  /**< RGBA */
1043    GLfloat PostColorMatrixBias[4];   /**< RGBA */
1044
1045    /* Histogram & minmax (GL_EXT_histogram) */
1046    /* Note: histogram and minmax data are not part of this attrib group */
1047    GLboolean HistogramEnabled;
1048    GLboolean MinMaxEnabled;
1049
1050    /*--- End Pixel Transfer State ---*/
1051
1052    /* Pixel Zoom */
1053    GLfloat ZoomX, ZoomY;
1054
1055    /** GL_SGI_texture_color_table */
1056    GLfloat TextureColorTableScale[4];
1057    GLfloat TextureColorTableBias[4];
1058 };
1059
1060
1061 /**
1062  * Point attribute group (GL_POINT_BIT).
1063  */
1064 struct gl_point_attrib
1065 {
1066    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1067    GLfloat Size;                /**< User-specified point size */
1068    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1069    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1070    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1071    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1072    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
1073    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_ARB_point_sprite */
1074    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1075    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1076 };
1077
1078
1079 /**
1080  * Polygon attribute group (GL_POLYGON_BIT).
1081  */
1082 struct gl_polygon_attrib
1083 {
1084    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1085    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1086    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1087    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1088    GLboolean CullFlag;          /**< Culling on/off flag */
1089    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1090    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1091    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1092    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1093    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1094    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1095    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1096    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1097 };
1098
1099
1100 /**
1101  * Scissor attributes (GL_SCISSOR_BIT).
1102  */
1103 struct gl_scissor_attrib
1104 {
1105    GLboolean Enabled;           /**< Scissor test enabled? */
1106    GLint X, Y;                  /**< Lower left corner of box */
1107    GLsizei Width, Height;       /**< Size of box */
1108 };
1109
1110
1111 /**
1112  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1113  */
1114 struct gl_stencil_attrib
1115 {
1116    GLboolean Enabled;           /**< Enabled flag */
1117    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1118    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1119    GLboolean _TestTwoSide;
1120    GLenum Function[2];          /**< Stencil function */
1121    GLenum FailFunc[2];          /**< Fail function */
1122    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1123    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1124    GLint Ref[2];                /**< Reference value */
1125    GLuint ValueMask[2];         /**< Value mask */
1126    GLuint WriteMask[2];         /**< Write mask */
1127    GLuint Clear;                /**< Clear value */
1128 };
1129
1130
1131 #define NUM_TEXTURE_TARGETS 7   /* 1D, 2D, 3D, CUBE, RECT, 1D_STACK, and 2D_STACK */
1132
1133 /**
1134  * An index for each type of texture object
1135  */
1136 /*@{*/
1137 #define TEXTURE_1D_INDEX       0
1138 #define TEXTURE_2D_INDEX       1
1139 #define TEXTURE_3D_INDEX       2
1140 #define TEXTURE_CUBE_INDEX     3
1141 #define TEXTURE_RECT_INDEX     4
1142 #define TEXTURE_1D_ARRAY_INDEX 5
1143 #define TEXTURE_2D_ARRAY_INDEX 6
1144 /*@}*/
1145
1146 /**
1147  * Bit flags for each type of texture object
1148  * Used for Texture.Unit[]._ReallyEnabled flags.
1149  */
1150 /*@{*/
1151 #define TEXTURE_1D_BIT       (1 << TEXTURE_1D_INDEX)
1152 #define TEXTURE_2D_BIT       (1 << TEXTURE_2D_INDEX)
1153 #define TEXTURE_3D_BIT       (1 << TEXTURE_3D_INDEX)
1154 #define TEXTURE_CUBE_BIT     (1 << TEXTURE_CUBE_INDEX)
1155 #define TEXTURE_RECT_BIT     (1 << TEXTURE_RECT_INDEX)
1156 #define TEXTURE_1D_ARRAY_BIT (1 << TEXTURE_1D_ARRAY_INDEX)
1157 #define TEXTURE_2D_ARRAY_BIT (1 << TEXTURE_2D_ARRAY_INDEX)
1158 /*@}*/
1159
1160
1161 /**
1162  * TexGenEnabled flags.
1163  */
1164 /*@{*/
1165 #define S_BIT 1
1166 #define T_BIT 2
1167 #define R_BIT 4
1168 #define Q_BIT 8
1169 /*@}*/
1170
1171
1172 /**
1173  * Bit flag versions of the corresponding GL_ constants.
1174  */
1175 /*@{*/
1176 #define TEXGEN_SPHERE_MAP        0x1
1177 #define TEXGEN_OBJ_LINEAR        0x2
1178 #define TEXGEN_EYE_LINEAR        0x4
1179 #define TEXGEN_REFLECTION_MAP_NV 0x8
1180 #define TEXGEN_NORMAL_MAP_NV     0x10
1181
1182 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1183                                   TEXGEN_REFLECTION_MAP_NV | \
1184                                   TEXGEN_NORMAL_MAP_NV)
1185 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1186                                   TEXGEN_REFLECTION_MAP_NV | \
1187                                   TEXGEN_NORMAL_MAP_NV     | \
1188                                   TEXGEN_EYE_LINEAR)
1189 /*@}*/
1190
1191
1192 /* A selection of state flags to make driver and module's lives easier. */
1193 #define ENABLE_TEXGEN0        0x1
1194 #define ENABLE_TEXGEN1        0x2
1195 #define ENABLE_TEXGEN2        0x4
1196 #define ENABLE_TEXGEN3        0x8
1197 #define ENABLE_TEXGEN4        0x10
1198 #define ENABLE_TEXGEN5        0x20
1199 #define ENABLE_TEXGEN6        0x40
1200 #define ENABLE_TEXGEN7        0x80
1201
1202 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1203 #define ENABLE_TEXMAT1        0x2
1204 #define ENABLE_TEXMAT2        0x4
1205 #define ENABLE_TEXMAT3        0x8
1206 #define ENABLE_TEXMAT4        0x10
1207 #define ENABLE_TEXMAT5        0x20
1208 #define ENABLE_TEXMAT6        0x40
1209 #define ENABLE_TEXMAT7        0x80
1210
1211 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1212 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1213
1214
1215 /**
1216  * Texel fetch function prototype.  We use texel fetch functions to
1217  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1218  * texture images.  These functions help to isolate us from the gritty
1219  * details of all the various texture image encodings.
1220  *
1221  * \param texImage texture image.
1222  * \param col texel column.
1223  * \param row texel row.
1224  * \param img texel image level/layer.
1225  * \param texelOut output texel (up to 4 GLchans)
1226  */
1227 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1228                                  GLint col, GLint row, GLint img,
1229                                  GLchan *texelOut );
1230
1231 /**
1232  * As above, but returns floats.
1233  * Used for depth component images and for upcoming signed/float
1234  * texture images.
1235  */
1236 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1237                                  GLint col, GLint row, GLint img,
1238                                  GLfloat *texelOut );
1239
1240
1241 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1242                                GLint col, GLint row, GLint img,
1243                                const void *texel);
1244
1245
1246 /**
1247  * This macro defines the (many) parameters to the texstore functions.
1248  * \param dims  either 1 or 2 or 3
1249  * \param baseInternalFormat  user-specified base internal format
1250  * \param dstFormat  destination Mesa texture format
1251  * \param dstAddr  destination image address
1252  * \param dstX/Y/Zoffset  destination x/y/z offset (ala TexSubImage), in texels
1253  * \param dstRowStride  destination image row stride, in bytes
1254  * \param dstImageOffsets  offset of each 2D slice within 3D texture, in texels
1255  * \param srcWidth/Height/Depth  source image size, in pixels
1256  * \param srcFormat  incoming image format
1257  * \param srcType  incoming image data type
1258  * \param srcAddr  source image address
1259  * \param srcPacking  source image packing parameters
1260  */
1261 #define TEXSTORE_PARAMS \
1262         GLcontext *ctx, GLuint dims, \
1263         GLenum baseInternalFormat, \
1264         const struct gl_texture_format *dstFormat, \
1265         GLvoid *dstAddr, \
1266         GLint dstXoffset, GLint dstYoffset, GLint dstZoffset, \
1267         GLint dstRowStride, const GLuint *dstImageOffsets, \
1268         GLint srcWidth, GLint srcHeight, GLint srcDepth, \
1269         GLenum srcFormat, GLenum srcType, \
1270         const GLvoid *srcAddr, \
1271         const struct gl_pixelstore_attrib *srcPacking
1272
1273
1274
1275 /**
1276  * Texture image storage function.
1277  */
1278 typedef GLboolean (*StoreTexImageFunc)(TEXSTORE_PARAMS);
1279
1280
1281 /**
1282  * Texture format record
1283  */
1284 struct gl_texture_format
1285 {
1286    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1287
1288    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1289                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1290                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1291                                  *   GL_DEPTH_COMPONENT.
1292                                  */
1293    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1294
1295    /**
1296     * Bits per texel component.  These are just rough approximations
1297     * for compressed texture formats.
1298     */
1299    /*@{*/
1300    GLubyte RedBits;
1301    GLubyte GreenBits;
1302    GLubyte BlueBits;
1303    GLubyte AlphaBits;
1304    GLubyte LuminanceBits;
1305    GLubyte IntensityBits;
1306    GLubyte IndexBits;
1307    GLubyte DepthBits;
1308    GLubyte StencilBits;         /**< GL_EXT_packed_depth_stencil */
1309    /*@}*/
1310
1311    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1312
1313    StoreTexImageFunc StoreImage;
1314
1315    /**
1316     * \name Texel fetch function pointers
1317     */
1318    /*@{*/
1319    FetchTexelFuncC FetchTexel1D;
1320    FetchTexelFuncC FetchTexel2D;
1321    FetchTexelFuncC FetchTexel3D;
1322    FetchTexelFuncF FetchTexel1Df;
1323    FetchTexelFuncF FetchTexel2Df;
1324    FetchTexelFuncF FetchTexel3Df;
1325    /*@}*/
1326
1327    StoreTexelFunc StoreTexel;
1328 };
1329
1330
1331 /**
1332  * Texture image state.  Describes the dimensions of a texture image,
1333  * the texel format and pointers to Texel Fetch functions.
1334  */
1335 struct gl_texture_image
1336 {
1337    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1338                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1339                                  *   GL_INTENSITY, GL_COLOR_INDEX,
1340                                  *   GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT
1341                                  *   only. Used for choosing TexEnv arithmetic.
1342                                  */
1343    GLint InternalFormat;        /**< Internal format as given by the user */
1344    GLuint Border;               /**< 0 or 1 */
1345    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1346    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1347    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1348    GLuint Width2;               /**< = Width - 2*Border */
1349    GLuint Height2;              /**< = Height - 2*Border */
1350    GLuint Depth2;               /**< = Depth - 2*Border */
1351    GLuint WidthLog2;            /**< = log2(Width2) */
1352    GLuint HeightLog2;           /**< = log2(Height2) */
1353    GLuint DepthLog2;            /**< = log2(Depth2) */
1354    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1355    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1356    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1357    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1358    GLboolean IsClientData;      /**< Data owned by client? */
1359    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1360
1361    const struct gl_texture_format *TexFormat;
1362
1363    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1364
1365    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1366    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1367
1368    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1369    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1370
1371    GLuint RowStride;            /**< Padded width in units of texels */
1372    GLuint *ImageOffsets;        /**< if 3D texture: array [Depth] of offsets to
1373                                      each 2D slice in 'Data', in texels */
1374    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1375
1376    /**
1377     * \name For device driver:
1378     */
1379    /*@{*/
1380    void *DriverData;            /**< Arbitrary device driver data */
1381    /*@}*/
1382 };
1383
1384
1385 /**
1386  * Indexes for cube map faces.
1387  */
1388 /*@{*/
1389 #define FACE_POS_X   0
1390 #define FACE_NEG_X   1
1391 #define FACE_POS_Y   2
1392 #define FACE_NEG_Y   3
1393 #define FACE_POS_Z   4
1394 #define FACE_NEG_Z   5
1395 #define MAX_FACES    6
1396 /*@}*/
1397
1398
1399 /**
1400  * Texture object state.  Contains the array of mipmap images, border color,
1401  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1402  * color palette.
1403  */
1404 struct gl_texture_object
1405 {
1406    _glthread_Mutex Mutex;       /**< for thread safety */
1407    GLint RefCount;              /**< reference count */
1408    GLuint Name;                 /**< the user-visible texture object ID */
1409    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1410    GLfloat Priority;            /**< in [0,1] */
1411    GLfloat BorderColor[4];      /**< unclamped */
1412    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1413    GLenum WrapS;                /**< S-axis texture image wrap mode */
1414    GLenum WrapT;                /**< T-axis texture image wrap mode */
1415    GLenum WrapR;                /**< R-axis texture image wrap mode */
1416    GLenum MinFilter;            /**< minification filter */
1417    GLenum MagFilter;            /**< magnification filter */
1418    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1419    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1420    GLfloat LodBias;             /**< OpenGL 1.4 */
1421    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1422    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1423    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1424    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1425    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1426    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1427    GLenum CompareMode;          /**< GL_ARB_shadow */
1428    GLenum CompareFunc;          /**< GL_ARB_shadow */
1429    GLenum _Function;            /**< Comparison function derived from
1430                                  * \c CompareOperator, \c CompareMode, and
1431                                  * \c CompareFunc.
1432                                  */
1433    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1434    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1435    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1436    GLint CropRect[4];           /**< GL_OES_draw_texture */
1437    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1438    GLboolean _Complete;         /**< Is texture object complete? */
1439
1440    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1441    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1442
1443    /** GL_EXT_paletted_texture */
1444    struct gl_color_table Palette;
1445
1446    /**
1447     * \name For device driver.
1448     * Note: instead of attaching driver data to this pointer, it's preferable
1449     * to instead use this struct as a base class for your own texture object
1450     * class.  Driver->NewTextureObject() can be used to implement the
1451     * allocation.
1452     */
1453    void *DriverData;    /**< Arbitrary device driver data */
1454 };
1455
1456
1457 /**
1458  * Texture combine environment state.
1459  *
1460  * \todo
1461  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1462  * structure will need to be expanded for 4 elements.
1463  */
1464 struct gl_tex_env_combine_state
1465 {
1466    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1467    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1468    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1469    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1470    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1471    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1472    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1473    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1474    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1475    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1476 };
1477
1478
1479 /**
1480  * Texture unit state.  Contains enable flags, texture environment/function/
1481  * combiners, texgen state, pointers to current texture objects and
1482  * post-filter color tables.
1483  */
1484 struct gl_texture_unit
1485 {
1486    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1487    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1488
1489    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1490    GLfloat EnvColor[4];
1491    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1492    /** \name Tex coord generation mode
1493     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1494    /*@{*/
1495    GLenum GenModeS;
1496    GLenum GenModeT;
1497    GLenum GenModeR;
1498    GLenum GenModeQ;
1499    /*@}*/
1500    GLbitfield _GenBitS;
1501    GLbitfield _GenBitT;
1502    GLbitfield _GenBitR;
1503    GLbitfield _GenBitQ;
1504    GLbitfield _GenFlags;        /**< bitwise or of _GenBit[STRQ] */
1505    GLfloat ObjectPlaneS[4];
1506    GLfloat ObjectPlaneT[4];
1507    GLfloat ObjectPlaneR[4];
1508    GLfloat ObjectPlaneQ[4];
1509    GLfloat EyePlaneS[4];
1510    GLfloat EyePlaneT[4];
1511    GLfloat EyePlaneR[4];
1512    GLfloat EyePlaneQ[4];
1513    GLfloat LodBias;             /**< for biasing mipmap levels */
1514
1515    /**
1516     * \name GL_EXT_texture_env_combine
1517     */
1518    struct gl_tex_env_combine_state Combine;
1519
1520    /**
1521     * Derived state based on \c EnvMode and the \c BaseFormat of the
1522     * currently enabled texture.
1523     */
1524    struct gl_tex_env_combine_state _EnvMode;
1525
1526    /**
1527     * Currently enabled combiner state.  This will point to either
1528     * \c Combine or \c _EnvMode.
1529     */
1530    struct gl_tex_env_combine_state *_CurrentCombine;
1531
1532    struct gl_texture_object *Current1D;
1533    struct gl_texture_object *Current2D;
1534    struct gl_texture_object *Current3D;
1535    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1536    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1537    struct gl_texture_object *Current1DArray; /**< GL_MESA_texture_array */
1538    struct gl_texture_object *Current2DArray; /**< GL_MESA_texture_array */
1539
1540    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1541
1542    /** GL_SGI_texture_color_table */
1543    /*@{*/
1544    struct gl_color_table ColorTable;
1545    struct gl_color_table ProxyColorTable;
1546    GLboolean ColorTableEnabled;
1547    /*@}*/
1548 };
1549
1550
1551
1552 /**
1553  * Texture attribute group (GL_TEXTURE_BIT).
1554  */
1555 struct gl_texture_attrib
1556 {
1557    /**
1558     * name multitexture
1559     */
1560    /**@{*/
1561    GLuint CurrentUnit;   /**< Active texture unit [0, MaxTextureImageUnits-1] */
1562    GLbitfield _EnabledUnits;  /**< one bit set for each really-enabled unit */
1563    GLbitfield _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1564    GLbitfield _GenFlags;            /**< for texgen */
1565    GLbitfield _TexGenEnabled;
1566    GLbitfield _TexMatEnabled;
1567    /**@}*/
1568
1569    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1570
1571    struct gl_texture_object *ProxyTex[NUM_TEXTURE_TARGETS];
1572
1573    /** GL_EXT_shared_texture_palette */
1574    GLboolean SharedPalette;
1575    struct gl_color_table Palette;
1576 };
1577
1578
1579 /**
1580  * Transformation attribute group (GL_TRANSFORM_BIT).
1581  */
1582 struct gl_transform_attrib
1583 {
1584    GLenum MatrixMode;                           /**< Matrix mode */
1585    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1586    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1587    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1588    GLboolean Normalize;                         /**< Normalize all normals? */
1589    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1590    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1591
1592    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1593    GLfloat CullEyePos[4];
1594    GLfloat CullObjPos[4];
1595 };
1596
1597
1598 /**
1599  * Viewport attribute group (GL_VIEWPORT_BIT).
1600  */
1601 struct gl_viewport_attrib
1602 {
1603    GLint X, Y;                  /**< position */
1604    GLsizei Width, Height;       /**< size */
1605    GLfloat Near, Far;           /**< Depth buffer range */
1606    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1607 };
1608
1609
1610 /**
1611  * Node for the attribute stack.
1612  */
1613 struct gl_attrib_node
1614 {
1615    GLbitfield kind;
1616    void *data;
1617    struct gl_attrib_node *next;
1618 };
1619
1620
1621 /**
1622  * GL_ARB_vertex/pixel_buffer_object buffer object
1623  */
1624 struct gl_buffer_object
1625 {
1626    GLint RefCount;
1627    GLuint Name;
1628    GLenum Usage;
1629    GLenum Access;
1630    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1631    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1632    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1633    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1634 };
1635
1636
1637
1638 /**
1639  * Client pixel packing/unpacking attributes
1640  */
1641 struct gl_pixelstore_attrib
1642 {
1643    GLint Alignment;
1644    GLint RowLength;
1645    GLint SkipPixels;
1646    GLint SkipRows;
1647    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1648    GLint SkipImages;      /**< for GL_EXT_texture3D */
1649    GLboolean SwapBytes;
1650    GLboolean LsbFirst;
1651    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1652    GLboolean Invert;        /**< GL_MESA_pack_invert */
1653    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1654 };
1655
1656
1657
1658 /**
1659  * Client vertex array attributes
1660  */
1661 struct gl_client_array
1662 {
1663    GLint Size;                  /**< components per element (1,2,3,4) */
1664    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1665    GLsizei Stride;              /**< user-specified stride */
1666    GLsizei StrideB;             /**< actual stride in bytes */
1667    const GLubyte *Ptr;          /**< Points to array data */
1668    GLboolean Enabled;           /**< Enabled flag is a boolean */
1669    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1670
1671    /**< GL_ARB_vertex_buffer_object */
1672    struct gl_buffer_object *BufferObj;
1673    GLuint _MaxElement;
1674 };
1675
1676
1677 /**
1678  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1679  * extension, but a nice encapsulation in any case.
1680  */
1681 struct gl_array_object
1682 {
1683    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1684    GLuint Name;
1685
1686    /** Conventional vertex arrays */
1687    /*@{*/
1688    struct gl_client_array Vertex;
1689    struct gl_client_array Normal;
1690    struct gl_client_array Color;
1691    struct gl_client_array SecondaryColor;
1692    struct gl_client_array FogCoord;
1693    struct gl_client_array Index;
1694    struct gl_client_array EdgeFlag;
1695    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1696    struct gl_client_array PointSize;
1697    /*@}*/
1698
1699    /** Generic arrays for vertex programs/shaders */
1700    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1701
1702    /** Mask of _NEW_ARRAY_* values indicating which arrays are enabled */
1703    GLbitfield _Enabled;
1704 };
1705
1706
1707 /**
1708  * Vertex array state
1709  */
1710 struct gl_array_attrib
1711 {
1712    struct gl_array_object *ArrayObj;
1713    struct gl_array_object *DefaultArrayObj;
1714
1715    GLint ActiveTexture;         /**< Client Active Texture */
1716    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1717    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1718
1719    GLbitfield NewState;         /**< mask of _NEW_ARRAY_* values */
1720
1721 #if FEATURE_ARB_vertex_buffer_object
1722    struct gl_buffer_object *NullBufferObj;
1723    struct gl_buffer_object *ArrayBufferObj;
1724    struct gl_buffer_object *ElementArrayBufferObj;
1725 #endif
1726    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1727 };
1728
1729
1730 /**
1731  * Feedback buffer state
1732  */
1733 struct gl_feedback
1734 {
1735    GLenum Type;
1736    GLbitfield _Mask;            /* FB_* bits */
1737    GLfloat *Buffer;
1738    GLuint BufferSize;
1739    GLuint Count;
1740 };
1741
1742
1743 /**
1744  * Selection buffer state
1745  */
1746 struct gl_selection
1747 {
1748    GLuint *Buffer;      /**< selection buffer */
1749    GLuint BufferSize;   /**< size of the selection buffer */
1750    GLuint BufferCount;  /**< number of values in the selection buffer */
1751    GLuint Hits;         /**< number of records in the selection buffer */
1752    GLuint NameStackDepth; /**< name stack depth */
1753    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1754    GLboolean HitFlag;   /**< hit flag */
1755    GLfloat HitMinZ;     /**< minimum hit depth */
1756    GLfloat HitMaxZ;     /**< maximum hit depth */
1757 };
1758
1759
1760 /**
1761  * 1-D Evaluator control points
1762  */
1763 struct gl_1d_map
1764 {
1765    GLuint Order;        /**< Number of control points */
1766    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1767    GLfloat *Points;     /**< Points to contiguous control points */
1768 };
1769
1770
1771 /**
1772  * 2-D Evaluator control points
1773  */
1774 struct gl_2d_map
1775 {
1776    GLuint Uorder;               /**< Number of control points in U dimension */
1777    GLuint Vorder;               /**< Number of control points in V dimension */
1778    GLfloat u1, u2, du;
1779    GLfloat v1, v2, dv;
1780    GLfloat *Points;             /**< Points to contiguous control points */
1781 };
1782
1783
1784 /**
1785  * All evaluator control point state
1786  */
1787 struct gl_evaluators
1788 {
1789    /**
1790     * \name 1-D maps
1791     */
1792    /*@{*/
1793    struct gl_1d_map Map1Vertex3;
1794    struct gl_1d_map Map1Vertex4;
1795    struct gl_1d_map Map1Index;
1796    struct gl_1d_map Map1Color4;
1797    struct gl_1d_map Map1Normal;
1798    struct gl_1d_map Map1Texture1;
1799    struct gl_1d_map Map1Texture2;
1800    struct gl_1d_map Map1Texture3;
1801    struct gl_1d_map Map1Texture4;
1802    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1803    /*@}*/
1804
1805    /**
1806     * \name 2-D maps
1807     */
1808    /*@{*/
1809    struct gl_2d_map Map2Vertex3;
1810    struct gl_2d_map Map2Vertex4;
1811    struct gl_2d_map Map2Index;
1812    struct gl_2d_map Map2Color4;
1813    struct gl_2d_map Map2Normal;
1814    struct gl_2d_map Map2Texture1;
1815    struct gl_2d_map Map2Texture2;
1816    struct gl_2d_map Map2Texture3;
1817    struct gl_2d_map Map2Texture4;
1818    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1819    /*@}*/
1820 };
1821
1822
1823 /**
1824  * Names of the various vertex/fragment program register files, etc.
1825  *
1826  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1827  * All values should fit in a 4-bit field.
1828  *
1829  * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
1830  * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
1831  * be "uniform" variables since they can only be set outside glBegin/End.
1832  * They're also all stored in the same Parameters array.
1833  */
1834 enum register_file
1835 {
1836    PROGRAM_TEMPORARY = 0,   /**< machine->Temporary[] */
1837    PROGRAM_LOCAL_PARAM = 1, /**< gl_program->LocalParams[] */
1838    PROGRAM_ENV_PARAM = 2,   /**< gl_program->Parameters[] */
1839    PROGRAM_STATE_VAR = 3,   /**< gl_program->Parameters[] */
1840    PROGRAM_INPUT = 4,       /**< machine->Inputs[] */
1841    PROGRAM_OUTPUT = 5,      /**< machine->Outputs[] */
1842    PROGRAM_NAMED_PARAM = 6, /**< gl_program->Parameters[] */
1843    PROGRAM_CONSTANT = 7,    /**< gl_program->Parameters[] */
1844    PROGRAM_UNIFORM = 8,     /**< gl_program->Parameters[] */
1845    PROGRAM_VARYING = 9,     /**< machine->Inputs[]/Outputs[] */
1846    PROGRAM_WRITE_ONLY = 10, /**< A dummy, write-only register */
1847    PROGRAM_ADDRESS = 11,    /**< machine->AddressReg */
1848    PROGRAM_SAMPLER = 12,    /**< for shader samplers, compile-time only */
1849    PROGRAM_UNDEFINED = 13,  /**< Invalid value */
1850    PROGRAM_FILE_MAX
1851 };
1852
1853
1854 /** Vertex and fragment instructions */
1855 struct prog_instruction;
1856 struct gl_program_parameter_list;
1857 struct gl_uniform_list;
1858
1859
1860 /**
1861  * Base class for any kind of program object
1862  */
1863 struct gl_program
1864 {
1865    GLuint Id;
1866    GLubyte *String;  /**< Null-terminated program text */
1867    GLint RefCount;
1868    GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
1869    GLenum Format;    /**< String encoding format */
1870    GLboolean Resident;
1871
1872    struct prog_instruction *Instructions;
1873
1874    GLbitfield InputsRead;     /**< Bitmask of which input regs are read */
1875    GLbitfield OutputsWritten; /**< Bitmask of which output regs are written to */
1876    GLbitfield InputFlags[MAX_PROGRAM_INPUTS];   /**< PROG_PARAM_BIT_x flags */
1877    GLbitfield OutputFlags[MAX_PROGRAM_OUTPUTS]; /**< PROG_PARAM_BIT_x flags */
1878    GLbitfield TexturesUsed[MAX_TEXTURE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1879    GLbitfield SamplersUsed;   /**< Bitfield of which samplers are used */
1880    GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */
1881
1882
1883    /** Named parameters, constants, etc. from program text */
1884    struct gl_program_parameter_list *Parameters;
1885    /** Numbered local parameters */
1886    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1887
1888    /** Vertex/fragment shader varying vars */
1889    struct gl_program_parameter_list *Varying;
1890    /** Vertex program user-defined attributes */
1891    struct gl_program_parameter_list *Attributes;
1892
1893    /** Map from sampler unit to texture unit (set by glUniform1i()) */
1894    GLubyte SamplerUnits[MAX_SAMPLERS];
1895    /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
1896    GLubyte SamplerTargets[MAX_SAMPLERS];
1897
1898    /** Logical counts */
1899    /*@{*/
1900    GLuint NumInstructions;
1901    GLuint NumTemporaries;
1902    GLuint NumParameters;
1903    GLuint NumAttributes;
1904    GLuint NumAddressRegs;
1905    GLuint NumAluInstructions;
1906    GLuint NumTexInstructions;
1907    GLuint NumTexIndirections;
1908    /*@}*/
1909    /** Native, actual h/w counts */
1910    /*@{*/
1911    GLuint NumNativeInstructions;
1912    GLuint NumNativeTemporaries;
1913    GLuint NumNativeParameters;
1914    GLuint NumNativeAttributes;
1915    GLuint NumNativeAddressRegs;
1916    GLuint NumNativeAluInstructions;
1917    GLuint NumNativeTexInstructions;
1918    GLuint NumNativeTexIndirections;
1919    /*@}*/
1920 };
1921
1922
1923 /** Vertex program object */
1924 struct gl_vertex_program
1925 {
1926    struct gl_program Base;   /**< base class */
1927    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1928    GLboolean IsPositionInvariant;
1929    void *TnlData;               /**< should probably use Base.DriverData */
1930 };
1931
1932
1933 /** Fragment program object */
1934 struct gl_fragment_program
1935 {
1936    struct gl_program Base;   /**< base class */
1937    GLenum FogOption;
1938    GLboolean UsesKill;          /**< shader uses KIL instruction */
1939    GLboolean UsesPointCoord;    /**< shader uses gl_PointCoord */
1940    GLboolean UsesFrontFacing;   /**< shader used gl_FrontFacing */
1941    GLboolean UsesFogFragCoord;  /**< shader used gl_FogFragCoord */
1942 };
1943
1944
1945 /**
1946  * State common to vertex and fragment programs.
1947  */
1948 struct gl_program_state
1949 {
1950    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1951    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1952 };
1953
1954
1955 /**
1956  * Context state for vertex programs.
1957  */
1958 struct gl_vertex_program_state
1959 {
1960    GLboolean Enabled;               /**< User-set GL_VERTEX_PROGRAM_ARB/NV flag */
1961    GLboolean _Enabled;              /**< Enabled and _valid_ user program? */
1962    GLboolean PointSizeEnabled;      /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1963    GLboolean TwoSideEnabled;        /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1964    struct gl_vertex_program *Current;  /**< User-bound vertex program */
1965
1966    /** Currently enabled and valid vertex program (including internal programs,
1967     * user-defined vertex programs and GLSL vertex shaders).
1968     * This is the program we must use when rendering.
1969     */
1970    struct gl_vertex_program *_Current;
1971
1972    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1973
1974    /* For GL_NV_vertex_program only: */
1975    GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
1976    GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];
1977
1978    /** Should fixed-function T&L be implemented with a vertex prog? */
1979    GLboolean _MaintainTnlProgram;
1980
1981    /** Program to emulate fixed-function T&L (see above) */
1982    struct gl_vertex_program *_TnlProgram;
1983
1984    /** Cache of fixed-function programs */
1985    struct gl_program_cache *Cache;
1986
1987 #if FEATURE_MESA_program_debug
1988    GLprogramcallbackMESA Callback;
1989    GLvoid *CallbackData;
1990    GLboolean CallbackEnabled;
1991    GLuint CurrentPosition;
1992 #endif
1993
1994    GLboolean _Overriden;
1995 };
1996
1997
1998 /**
1999  * Context state for fragment programs.
2000  */
2001 struct gl_fragment_program_state
2002 {
2003    GLboolean Enabled;     /**< User-set fragment program enable flag */
2004    GLboolean _Enabled;    /**< Enabled and _valid_ user program? */
2005    struct gl_fragment_program *Current;  /**< User-bound fragment program */
2006
2007    /** Currently enabled and valid fragment program (including internal programs,
2008     * user-defined fragment programs and GLSL fragment shaders).
2009     * This is the program we must use when rendering.
2010     */
2011    struct gl_fragment_program *_Current;
2012
2013    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
2014
2015    /** Should fixed-function texturing be implemented with a fragment prog? */
2016    GLboolean _MaintainTexEnvProgram;
2017
2018    /** Program to emulate fixed-function texture env/combine (see above) */
2019    struct gl_fragment_program *_TexEnvProgram;
2020
2021    /** Cache of fixed-function programs */
2022    struct gl_program_cache *Cache;
2023
2024 #if FEATURE_MESA_program_debug
2025    GLprogramcallbackMESA Callback;
2026    GLvoid *CallbackData;
2027    GLboolean CallbackEnabled;
2028    GLuint CurrentPosition;
2029 #endif
2030 };
2031
2032
2033 /**
2034  * ATI_fragment_shader runtime state
2035  */
2036 #define ATI_FS_INPUT_PRIMARY 0
2037 #define ATI_FS_INPUT_SECONDARY 1
2038
2039 struct atifs_instruction;
2040 struct atifs_setupinst;
2041
2042 /**
2043  * ATI fragment shader
2044  */
2045 struct ati_fragment_shader
2046 {
2047    GLuint Id;
2048    GLint RefCount;
2049    struct atifs_instruction *Instructions[2];
2050    struct atifs_setupinst *SetupInst[2];
2051    GLfloat Constants[8][4];
2052    GLbitfield LocalConstDef;  /** Indicates which constants have been set */
2053    GLubyte numArithInstr[2];
2054    GLubyte regsAssigned[2];
2055    GLubyte NumPasses;         /** 1 or 2 */
2056    GLubyte cur_pass;
2057    GLubyte last_optype;
2058    GLboolean interpinp1;
2059    GLboolean isValid;
2060    GLuint swizzlerq;
2061 };
2062
2063 /**
2064  * Context state for GL_ATI_fragment_shader
2065  */
2066 struct gl_ati_fragment_shader_state
2067 {
2068    GLboolean Enabled;
2069    GLboolean _Enabled;                      /** enabled and valid shader? */
2070    GLboolean Compiling;
2071    GLfloat GlobalConstants[8][4];
2072    struct ati_fragment_shader *Current;
2073 };
2074
2075
2076 /**
2077  * Occlusion/timer query object.
2078  */
2079 struct gl_query_object
2080 {
2081    GLenum Target;      /**< The query target, when active */
2082    GLuint Id;          /**< hash table ID/name */
2083    GLuint64EXT Result; /**< the counter */
2084    GLboolean Active;   /**< inside Begin/EndQuery */
2085    GLboolean Ready;    /**< result is ready? */
2086 };
2087
2088
2089 /**
2090  * Context state for query objects.
2091  */
2092 struct gl_query_state
2093 {
2094    struct _mesa_HashTable *QueryObjects;
2095    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2096    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2097 };
2098
2099
2100
2101 /**
2102  * A GLSL vertex or fragment shader object.
2103  */
2104 struct gl_shader
2105 {
2106    GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER (first field!) */
2107    GLuint Name;  /**< AKA the handle */
2108    GLint RefCount;  /**< Reference count */
2109    GLboolean DeletePending;
2110
2111    const GLchar *Source;  /**< Source code string */
2112    GLboolean CompileStatus;
2113    struct gl_program *Program;  /**< Post-compile assembly code */
2114    GLchar *InfoLog;
2115    GLboolean Main;  /**< shader defines main() */
2116 };
2117
2118
2119 /**
2120  * A GLSL program object.
2121  * Basically a linked collection of vertex and fragment shaders.
2122  */
2123 struct gl_shader_program
2124 {
2125    GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
2126    GLuint Name;  /**< aka handle or ID */
2127    GLint RefCount;  /**< Reference count */
2128    GLboolean DeletePending;
2129
2130    GLuint NumShaders;          /**< number of attached shaders */
2131    struct gl_shader **Shaders; /**< List of attached the shaders */
2132
2133    /** User-defined attribute bindings (glBindAttribLocation) */
2134    struct gl_program_parameter_list *Attributes;
2135
2136    /* post-link info: */
2137    struct gl_vertex_program *VertexProgram;     /**< Linked vertex program */
2138    struct gl_fragment_program *FragmentProgram; /**< Linked fragment prog */
2139    struct gl_uniform_list *Uniforms;
2140    struct gl_program_parameter_list *Varying;
2141    GLboolean LinkStatus;   /**< GL_LINK_STATUS */
2142    GLboolean Validated;
2143    GLchar *InfoLog;
2144 };
2145
2146
2147 /**
2148  * Context state for GLSL vertex/fragment shaders.
2149  */
2150 struct gl_shader_state
2151 {
2152    struct gl_shader_program *CurrentProgram; /**< The user-bound program */
2153    /** Driver-selectable options: */
2154    GLboolean EmitHighLevelInstructions; /**< IF/ELSE/ENDIF vs. BRA, etc. */
2155    GLboolean EmitCondCodes;             /**< Use condition codes? */
2156    GLboolean EmitComments;              /**< Annotated instructions */
2157    void *MemPool;
2158 };
2159
2160
2161 /**
2162  * State which can be shared by multiple contexts:
2163  */
2164 struct gl_shared_state
2165 {
2166    _glthread_Mutex Mutex;                  /**< for thread safety */
2167    GLint RefCount;                         /**< Reference count */
2168    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2169    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2170
2171    /**
2172     * \name Default texture objects (shared by all multi-texture units)
2173     */
2174    /*@{*/
2175    struct gl_texture_object *Default1D;
2176    struct gl_texture_object *Default2D;
2177    struct gl_texture_object *Default3D;
2178    struct gl_texture_object *DefaultCubeMap;
2179    struct gl_texture_object *DefaultRect;
2180    struct gl_texture_object *Default1DArray;
2181    struct gl_texture_object *Default2DArray;
2182    /*@}*/
2183
2184    /**
2185     * \name Thread safety and statechange notification for texture
2186     * objects.
2187     *
2188     * \todo Improve the granularity of locking.
2189     */
2190    /*@{*/
2191    _glthread_Mutex TexMutex;            /**< texobj thread safety */
2192    GLuint TextureStateStamp;            /**< state notification for shared tex */
2193    /*@}*/
2194
2195
2196    /**
2197     * \name Vertex/fragment programs
2198     */
2199    /*@{*/
2200    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2201 #if FEATURE_ARB_vertex_program
2202    struct gl_vertex_program *DefaultVertexProgram;
2203 #endif
2204 #if FEATURE_ARB_fragment_program
2205    struct gl_fragment_program *DefaultFragmentProgram;
2206 #endif
2207    /*@}*/
2208
2209 #if FEATURE_ATI_fragment_shader
2210    struct _mesa_HashTable *ATIShaders;
2211    struct ati_fragment_shader *DefaultFragmentShader;
2212 #endif
2213
2214 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2215    struct _mesa_HashTable *BufferObjects;
2216 #endif
2217
2218 #if FEATURE_ARB_shader_objects
2219    /** Table of both gl_shader and gl_shader_program objects */
2220    struct _mesa_HashTable *ShaderObjects;
2221 #endif
2222
2223 #if FEATURE_EXT_framebuffer_object
2224    struct _mesa_HashTable *RenderBuffers;
2225    struct _mesa_HashTable *FrameBuffers;
2226 #endif
2227
2228    /** Objects associated with the GL_APPLE_vertex_array_object extension. */
2229    struct _mesa_HashTable *ArrayObjects;
2230
2231    void *DriverData;  /**< Device driver shared state */
2232 };
2233
2234
2235
2236
2237 /**
2238  * A renderbuffer stores colors or depth values or stencil values.
2239  * A framebuffer object will have a collection of these.
2240  * Data are read/written to the buffer with a handful of Get/Put functions.
2241  *
2242  * Instances of this object are allocated with the Driver's NewRenderbuffer
2243  * hook.  Drivers will likely wrap this class inside a driver-specific
2244  * class to simulate inheritance.
2245  */
2246 struct gl_renderbuffer
2247 {
2248 #define RB_MAGIC 0xaabbccdd
2249    int Magic; /** XXX TEMPORARY DEBUG INFO */
2250    _glthread_Mutex Mutex;                  /**< for thread safety */
2251    GLuint ClassID;        /**< Useful for drivers */
2252    GLuint Name;
2253    GLint RefCount;
2254    GLuint Width, Height;
2255    GLenum InternalFormat; /**< The user-specified format */
2256    GLenum _ActualFormat;  /**< The driver-chosen format */
2257    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2258                                GL_STENCIL_INDEX. */
2259    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2260    GLubyte RedBits;      /**< Bits of red per pixel */
2261    GLubyte GreenBits;
2262    GLubyte BlueBits;
2263    GLubyte AlphaBits;
2264    GLubyte IndexBits;
2265    GLubyte DepthBits;
2266    GLubyte StencilBits;
2267    GLubyte Samples;     /**< Number of samples - 0 if not multisampled */
2268    GLvoid *Data;        /**< This may not be used by some kinds of RBs */
2269
2270    /* Used to wrap one renderbuffer around another: */
2271    struct gl_renderbuffer *Wrapped;
2272
2273    /* Delete this renderbuffer */
2274    void (*Delete)(struct gl_renderbuffer *rb);
2275
2276    /* Allocate new storage for this renderbuffer */
2277    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2278                              GLenum internalFormat,
2279                              GLuint width, GLuint height);
2280
2281    /* Lock/Unlock are called before/after calling the Get/Put functions.
2282     * Not sure this is the right place for these yet.
2283    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2284    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2285     */
2286
2287    /* Return a pointer to the element/pixel at (x,y).
2288     * Should return NULL if the buffer memory can't be directly addressed.
2289     */
2290    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2291                        GLint x, GLint y);
2292
2293    /* Get/Read a row of values.
2294     * The values will be of format _BaseFormat and type DataType.
2295     */
2296    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2297                   GLint x, GLint y, void *values);
2298
2299    /* Get/Read values at arbitrary locations.
2300     * The values will be of format _BaseFormat and type DataType.
2301     */
2302    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2303                      const GLint x[], const GLint y[], void *values);
2304
2305    /* Put/Write a row of values.
2306     * The values will be of format _BaseFormat and type DataType.
2307     */
2308    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2309                   GLint x, GLint y, const void *values, const GLubyte *mask);
2310
2311    /* Put/Write a row of RGB values.  This is a special-case routine that's
2312     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2313     * a common case for glDrawPixels and some triangle routines.
2314     * The values will be of format GL_RGB and type DataType.
2315     */
2316    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2317                     GLint x, GLint y, const void *values, const GLubyte *mask);
2318
2319
2320    /* Put/Write a row of identical values.
2321     * The values will be of format _BaseFormat and type DataType.
2322     */
2323    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2324                      GLint x, GLint y, const void *value, const GLubyte *mask);
2325
2326    /* Put/Write values at arbitrary locations.
2327     * The values will be of format _BaseFormat and type DataType.
2328     */
2329    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2330                      const GLint x[], const GLint y[], const void *values,
2331                      const GLubyte *mask);
2332    /* Put/Write identical values at arbitrary locations.
2333     * The values will be of format _BaseFormat and type DataType.
2334     */
2335    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2336                          GLuint count, const GLint x[], const GLint y[],
2337                          const void *value, const GLubyte *mask);
2338 };
2339
2340
2341 /**
2342  * A renderbuffer attachment point points to either a texture object
2343  * (and specifies a mipmap level, cube face or 3D texture slice) or
2344  * points to a renderbuffer.
2345  */
2346 struct gl_renderbuffer_attachment
2347 {
2348    GLenum Type;  /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
2349    GLboolean Complete;
2350
2351    /**
2352     * If \c Type is \c GL_RENDERBUFFER_EXT, this stores a pointer to the
2353     * application supplied renderbuffer object.
2354     */
2355    struct gl_renderbuffer *Renderbuffer;
2356
2357    /**
2358     * If \c Type is \c GL_TEXTURE, this stores a pointer to the application
2359     * supplied texture object.
2360     */
2361    struct gl_texture_object *Texture;
2362    GLuint TextureLevel; /**< Attached mipmap level. */
2363    GLuint CubeMapFace;  /**< 0 .. 5, for cube map textures. */
2364    GLuint Zoffset;      /**< Slice for 3D textures,  or layer for both 1D
2365                          * and 2D array textures */
2366 };
2367
2368
2369 /**
2370  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2371  * In C++ terms, think of this as a base class from which device drivers
2372  * will make derived classes.
2373  */
2374 struct gl_framebuffer
2375 {
2376    _glthread_Mutex Mutex;                  /**< for thread safety */
2377    GLuint Name;      /* if zero, this is a window system framebuffer */
2378    GLint RefCount;
2379    GLboolean DeletePending;
2380
2381    GLvisual Visual;     /**< The framebuffer's visual.
2382                              Immutable if this is a window system buffer.
2383                              Computed from attachments if user-made FBO. */
2384
2385    GLboolean Initialized;
2386
2387    GLuint Width, Height;        /**< size of frame buffer in pixels */
2388
2389    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2390    /*@{*/
2391    GLint _Xmin, _Xmax;  /**< inclusive */
2392    GLint _Ymin, _Ymax;  /**< exclusive */
2393    /*@}*/
2394
2395    /** \name  Derived Z buffer stuff */
2396    /*@{*/
2397    GLuint _DepthMax;    /**< Max depth buffer value */
2398    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2399    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2400    /*@}*/
2401
2402    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2403
2404    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2405    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2406
2407    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2408     * attribute group and GL_PIXEL attribute group, respectively.
2409     */
2410    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2411    GLenum ColorReadBuffer;
2412
2413    /** Computed from ColorDraw/ReadBuffer above */
2414    GLuint _NumColorDrawBuffers;
2415    GLint _ColorDrawBufferIndexes[MAX_DRAW_BUFFERS]; /**< BUFFER_x or -1 */
2416    GLint _ColorReadBufferIndex; /* -1 = None */
2417    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS];
2418    struct gl_renderbuffer *_ColorReadBuffer;
2419
2420    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2421     * depth/stencil buffers attached above. */
2422    struct gl_renderbuffer *_DepthBuffer;
2423    struct gl_renderbuffer *_StencilBuffer;
2424
2425    /** Delete this framebuffer */
2426    void (*Delete)(struct gl_framebuffer *fb);
2427 };
2428
2429
2430 /**
2431  * Limits for vertex and fragment programs.
2432  */
2433 struct gl_program_constants
2434 {
2435    /* logical limits */
2436    GLuint MaxInstructions;
2437    GLuint MaxAluInstructions; /* fragment programs only, for now */
2438    GLuint MaxTexInstructions; /* fragment programs only, for now */
2439    GLuint MaxTexIndirections; /* fragment programs only, for now */
2440    GLuint MaxAttribs;
2441    GLuint MaxTemps;
2442    GLuint MaxAddressRegs; /* vertex program only, for now */
2443    GLuint MaxParameters;
2444    GLuint MaxLocalParams;
2445    GLuint MaxEnvParams;
2446    /* native/hardware limits */
2447    GLuint MaxNativeInstructions;
2448    GLuint MaxNativeAluInstructions; /* fragment programs only, for now */
2449    GLuint MaxNativeTexInstructions; /* fragment programs only, for now */
2450    GLuint MaxNativeTexIndirections; /* fragment programs only, for now */
2451    GLuint MaxNativeAttribs;
2452    GLuint MaxNativeTemps;
2453    GLuint MaxNativeAddressRegs; /* vertex program only, for now */
2454    GLuint MaxNativeParameters;
2455    /* For shaders */
2456    GLuint MaxUniformComponents;
2457 };
2458
2459
2460 /**
2461  * Constants which may be overridden by device driver during context creation
2462  * but are never changed after that.
2463  */
2464 struct gl_constants
2465 {
2466    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2467    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2468    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2469    GLint MaxArrayTextureLayers;         /**< Maximum number of layers in an array texture. */
2470    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2471    GLuint MaxTextureCoordUnits;
2472    GLuint MaxTextureImageUnits;
2473    GLuint MaxTextureUnits;              /**< = MIN(CoordUnits, ImageUnits) */
2474    GLfloat MaxTextureMaxAnisotropy;     /**< GL_EXT_texture_filter_anisotropic */
2475    GLfloat MaxTextureLodBias;           /**< GL_EXT_texture_lod_bias */
2476    GLuint MaxArrayLockSize;
2477    GLint SubPixelBits;
2478    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2479    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2480    GLfloat PointSizeGranularity;
2481    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2482    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2483    GLfloat LineWidthGranularity;
2484    GLuint MaxColorTableSize;
2485    GLuint MaxConvolutionWidth;
2486    GLuint MaxConvolutionHeight;
2487    GLuint MaxClipPlanes;
2488    GLuint MaxLights;
2489    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2490    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2491    GLuint MaxViewportWidth, MaxViewportHeight;
2492    struct gl_program_constants VertexProgram;    /* GL_ARB_vertex_program */
2493    struct gl_program_constants FragmentProgram;  /* GL_ARB_fragment_program */
2494    /* shared by vertex and fragment program: */
2495    GLuint MaxProgramMatrices;
2496    GLuint MaxProgramMatrixStackDepth;
2497    /* vertex array / buffer object bounds checking */
2498    GLboolean CheckArrayBounds;
2499    /* GL_ARB_draw_buffers */
2500    GLuint MaxDrawBuffers;
2501    /* GL_OES_read_format */
2502    GLenum ColorReadFormat;
2503    GLenum ColorReadType;
2504    /* GL_EXT_framebuffer_object */
2505    GLuint MaxColorAttachments;
2506    GLuint MaxRenderbufferSize;
2507    /* GL_ARB_vertex_shader */
2508    GLuint MaxVertexTextureImageUnits;
2509    GLuint MaxVarying;  /**< Number of float[4] vectors */
2510 };
2511
2512
2513 /**
2514  * Enable flag for each OpenGL extension.  Different device drivers will
2515  * enable different extensions at runtime.
2516  */
2517 struct gl_extensions
2518 {
2519    /**
2520     * \name Flags to quickly test if certain extensions are available.
2521     *
2522     * Not every extension needs to have such a flag, but it's encouraged.
2523     */
2524    /*@{*/
2525    GLboolean dummy;  /* don't remove this! */
2526    GLboolean ARB_depth_texture;
2527    GLboolean ARB_draw_buffers;
2528    GLboolean ARB_fragment_program;
2529    GLboolean ARB_fragment_program_shadow;
2530    GLboolean ARB_fragment_shader;
2531    GLboolean ARB_half_float_pixel;
2532    GLboolean ARB_imaging;
2533    GLboolean ARB_multisample;
2534    GLboolean ARB_multitexture;
2535    GLboolean ARB_occlusion_query;
2536    GLboolean ARB_point_sprite;
2537    GLboolean ARB_shader_objects;
2538    GLboolean ARB_shading_language_100;
2539    GLboolean ARB_shading_language_120;
2540    GLboolean ARB_shadow;
2541    GLboolean ARB_texture_border_clamp;
2542    GLboolean ARB_texture_compression;
2543    GLboolean ARB_texture_cube_map;
2544    GLboolean ARB_texture_env_combine;
2545    GLboolean ARB_texture_env_crossbar;
2546    GLboolean ARB_texture_env_dot3;
2547    GLboolean ARB_texture_float;
2548    GLboolean ARB_texture_mirrored_repeat;
2549    GLboolean ARB_texture_non_power_of_two;
2550    GLboolean ARB_transpose_matrix;
2551    GLboolean ARB_vertex_buffer_object;
2552    GLboolean ARB_vertex_program;
2553    GLboolean ARB_vertex_shader;
2554    GLboolean ARB_window_pos;
2555    GLboolean EXT_abgr;
2556    GLboolean EXT_bgra;
2557    GLboolean EXT_blend_color;
2558    GLboolean EXT_blend_equation_separate;
2559    GLboolean EXT_blend_func_separate;
2560    GLboolean EXT_blend_logic_op;
2561    GLboolean EXT_blend_minmax;
2562    GLboolean EXT_blend_subtract;
2563    GLboolean EXT_clip_volume_hint;
2564    GLboolean EXT_cull_vertex;
2565    GLboolean EXT_convolution;
2566    GLboolean EXT_compiled_vertex_array;
2567    GLboolean EXT_copy_texture;
2568    GLboolean EXT_depth_bounds_test;
2569    GLboolean EXT_draw_range_elements;
2570    GLboolean EXT_framebuffer_object;
2571    GLboolean EXT_fog_coord;
2572    GLboolean EXT_framebuffer_blit;
2573    GLboolean EXT_gpu_program_parameters;
2574    GLboolean EXT_histogram;
2575    GLboolean EXT_multi_draw_arrays;
2576    GLboolean EXT_paletted_texture;
2577    GLboolean EXT_packed_depth_stencil;
2578    GLboolean EXT_packed_pixels;
2579    GLboolean EXT_pixel_buffer_object;
2580    GLboolean EXT_point_parameters;
2581    GLboolean EXT_polygon_offset;
2582    GLboolean EXT_rescale_normal;
2583    GLboolean EXT_shadow_funcs;
2584    GLboolean EXT_secondary_color;
2585    GLboolean EXT_separate_specular_color;
2586    GLboolean EXT_shared_texture_palette;
2587    GLboolean EXT_stencil_wrap;
2588    GLboolean EXT_stencil_two_side;
2589    GLboolean EXT_subtexture;
2590    GLboolean EXT_texture;
2591    GLboolean EXT_texture_object;
2592    GLboolean EXT_texture3D;
2593    GLboolean EXT_texture_compression_s3tc;
2594    GLboolean EXT_texture_env_add;
2595    GLboolean EXT_texture_env_combine;
2596    GLboolean EXT_texture_env_dot3;
2597    GLboolean EXT_texture_filter_anisotropic;
2598    GLboolean EXT_texture_lod_bias;
2599    GLboolean EXT_texture_mirror_clamp;
2600    GLboolean EXT_texture_sRGB;
2601    GLboolean EXT_timer_query;
2602    GLboolean EXT_vertex_array;
2603    GLboolean EXT_vertex_array_set;
2604    /* vendor extensions */
2605    GLboolean APPLE_client_storage;
2606    GLboolean APPLE_packed_pixels;
2607    GLboolean APPLE_vertex_array_object;
2608    GLboolean ATI_texture_mirror_once;
2609    GLboolean ATI_texture_env_combine3;
2610    GLboolean ATI_fragment_shader;
2611    GLboolean ATI_separate_stencil;
2612    GLboolean IBM_rasterpos_clip;
2613    GLboolean IBM_multimode_draw_arrays;
2614    GLboolean MESA_pack_invert;
2615    GLboolean MESA_packed_depth_stencil;
2616    GLboolean MESA_program_debug;
2617    GLboolean MESA_resize_buffers;
2618    GLboolean MESA_ycbcr_texture;
2619    GLboolean MESA_texture_array;
2620    GLboolean NV_blend_square;
2621    GLboolean NV_fragment_program;
2622    GLboolean NV_light_max_exponent;
2623    GLboolean NV_point_sprite;
2624    GLboolean NV_texgen_reflection;
2625    GLboolean NV_texture_rectangle;
2626    GLboolean NV_vertex_program;
2627    GLboolean NV_vertex_program1_1;
2628    GLboolean OES_read_format;
2629    GLboolean SGI_color_matrix;
2630    GLboolean SGI_color_table;
2631    GLboolean SGI_texture_color_table;
2632    GLboolean SGIS_generate_mipmap;
2633    GLboolean SGIS_texture_edge_clamp;
2634    GLboolean SGIS_texture_lod;
2635    GLboolean SGIX_shadow;
2636    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2637    GLboolean TDFX_texture_compression_FXT1;
2638    GLboolean S3_s3tc;
2639    /*@}*/
2640    /* The extension string */
2641    const GLubyte *String;
2642 };
2643
2644
2645 /**
2646  * A stack of matrices (projection, modelview, color, texture, etc).
2647  */
2648 struct gl_matrix_stack
2649 {
2650    GLmatrix *Top;      /**< points into Stack */
2651    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2652    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2653    GLuint MaxDepth;    /**< size of Stack[] array */
2654    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2655 };
2656
2657
2658 /**
2659  * \name Bits for image transfer operations
2660  *
2661  * \sa __GLcontextRec::ImageTransferState.
2662  */
2663 /*@{*/
2664 #define IMAGE_SCALE_BIAS_BIT                      0x1
2665 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2666 #define IMAGE_MAP_COLOR_BIT                       0x4
2667 #define IMAGE_COLOR_TABLE_BIT                     0x8
2668 #define IMAGE_CONVOLUTION_BIT                     0x10
2669 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2670 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2671 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2672 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2673 #define IMAGE_HISTOGRAM_BIT                       0x200
2674 #define IMAGE_MIN_MAX_BIT                         0x400
2675 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2676
2677
2678 /** Pixel Transfer ops up to convolution */
2679 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2680                                     IMAGE_SHIFT_OFFSET_BIT |   \
2681                                     IMAGE_MAP_COLOR_BIT |      \
2682                                     IMAGE_COLOR_TABLE_BIT)
2683
2684 /** Pixel transfer ops after convolution */
2685 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2686                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2687                                      IMAGE_COLOR_MATRIX_BIT |                 \
2688                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2689                                      IMAGE_HISTOGRAM_BIT |                    \
2690                                      IMAGE_MIN_MAX_BIT)
2691 /*@}*/
2692
2693
2694 /**
2695  * \name Bits to indicate what state has changed.
2696  *
2697  * 4 unused flags.
2698  */
2699 /*@{*/
2700 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2701 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2702 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2703 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2704 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2705 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2706 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2707 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2708 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2709 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2710 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2711 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2712 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2713 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2714 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2715 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2716 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2717 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2718 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2719 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2720 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2721 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2722 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2723 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2724 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2725 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2726 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2727 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2728 #define _NEW_CURRENT_ATTRIB     0x10000000  /**< __GLcontextRec::Current */
2729 #define _NEW_ALL ~0
2730 /*@}*/
2731
2732
2733 /**
2734  * \name Bits to track array state changes
2735  *
2736  * Also used to summarize array enabled.
2737  */
2738 /*@{*/
2739 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2740 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2741 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2742 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2743 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2744 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2745 #define _NEW_ARRAY_INDEX            VERT_BIT_COLOR_INDEX
2746 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_EDGEFLAG
2747 #define _NEW_ARRAY_POINT_SIZE       VERT_BIT_COLOR_INDEX  /* aliased */
2748 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2749 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2750 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2751 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2752 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2753 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2754 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2755 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2756 #define _NEW_ARRAY_ATTRIB_0         VERT_BIT_GENERIC0  /* start at bit 16 */
2757 #define _NEW_ARRAY_ALL              0xffffffff
2758
2759
2760 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2761 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2762 /*@}*/
2763
2764
2765
2766 /**
2767  * \name A bunch of flags that we think might be useful to drivers.
2768  *
2769  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2770  */
2771 /*@{*/
2772 #define DD_FLATSHADE                0x1
2773 #define DD_SEPARATE_SPECULAR        0x2
2774 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2775 #define DD_TRI_LIGHT_TWOSIDE        0x8
2776 #define DD_TRI_UNFILLED             0x10
2777 #define DD_TRI_SMOOTH               0x20
2778 #define DD_TRI_STIPPLE              0x40
2779 #define DD_TRI_OFFSET               0x80
2780 #define DD_LINE_SMOOTH              0x100
2781 #define DD_LINE_STIPPLE             0x200
2782 #define DD_LINE_WIDTH               0x400
2783 #define DD_POINT_SMOOTH             0x800
2784 #define DD_POINT_SIZE               0x1000
2785 #define DD_POINT_ATTEN              0x2000
2786 #define DD_TRI_TWOSTENCIL           0x4000
2787 /*@}*/
2788
2789
2790 /**
2791  * \name Define the state changes under which each of these bits might change
2792  */
2793 /*@{*/
2794 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2795 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2796 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2797 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2798 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2799 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2800 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2801 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2802 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2803 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2804 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2805 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2806 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2807 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2808 /*@}*/
2809
2810
2811 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2812                                            _NEW_TEXTURE |       \
2813                                            _NEW_POINT |         \
2814                                            _NEW_PROGRAM |       \
2815                                            _NEW_MODELVIEW)
2816
2817 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2818                                            _NEW_TEXTURE)
2819
2820 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2821
2822
2823
2824
2825 /*
2826  * Forward declaration of display list data types:
2827  */
2828 union node;
2829 typedef union node Node;
2830
2831
2832 /* This has to be included here. */
2833 #include "dd.h"
2834
2835
2836 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2837
2838 /**
2839  * Core Mesa's support for tnl modules:
2840  */
2841 struct gl_tnl_module
2842 {
2843    /**
2844     * Vertex format to be lazily swapped into current dispatch.
2845     */
2846    const GLvertexformat *Current;
2847
2848    /**
2849     * \name Record of functions swapped out.
2850     * On restore, only need to swap these functions back in.
2851     */
2852    /*@{*/
2853    struct {
2854        _glapi_proc * location;
2855        _glapi_proc function;
2856    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2857    GLuint SwapCount;
2858    /*@}*/
2859 };
2860
2861 /* Strictly this is a tnl/ private concept, but it doesn't seem
2862  * worthwhile adding a tnl private structure just to hold this one bit
2863  * of information:
2864  */
2865 #define MESA_DLIST_DANGLING_REFS     0x1
2866
2867 /* Provide a location where information about a display list can be
2868  * collected.  Could be extended with driverPrivate structures,
2869  * etc. in the future.
2870  */
2871 struct mesa_display_list
2872 {
2873    Node *node;
2874    GLuint id;
2875    GLbitfield flags;
2876 };
2877
2878
2879 /**
2880  * State used during display list compilation and execution.
2881  */
2882 struct gl_dlist_state
2883 {
2884    GLuint CallDepth;            /**< Current recursion calling depth */
2885
2886    struct mesa_display_list *CurrentList;
2887    Node *CurrentListPtr;        /**< Head of list being compiled */
2888    GLuint CurrentListNum;       /**< Number of the list being compiled */
2889    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2890    GLuint CurrentPos;           /**< Index into current block of nodes */
2891
2892    GLvertexformat ListVtxfmt;
2893
2894    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2895    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2896
2897    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2898    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2899
2900    GLubyte ActiveIndex;
2901    GLfloat CurrentIndex;
2902
2903    GLubyte ActiveEdgeFlag;
2904    GLboolean CurrentEdgeFlag;
2905 };
2906
2907
2908 /**
2909  * Mesa rendering context.
2910  *
2911  * This is the central context data structure for Mesa.  Almost all
2912  * OpenGL state is contained in this structure.
2913  * Think of this as a base class from which device drivers will derive
2914  * sub classes.
2915  *
2916  * The GLcontext typedef names this structure.
2917  */
2918 struct __GLcontextRec
2919 {
2920    /** State possibly shared with other contexts in the address space */
2921    struct gl_shared_state *Shared;
2922
2923    /** \name API function pointer tables */
2924    /*@{*/
2925    struct _glapi_table *Save;   /**< Display list save functions */
2926    struct _glapi_table *Exec;   /**< Execute functions */
2927    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2928    /*@}*/
2929
2930    GLvisual Visual;
2931    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2932    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2933    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2934    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2935
2936    /**
2937     * Device driver function pointer table
2938     */
2939    struct dd_function_table Driver;
2940
2941    void *DriverCtx;     /**< Points to device driver context/state */
2942
2943    /** Core/Driver constants */
2944    struct gl_constants Const;
2945
2946    /** \name The various 4x4 matrix stacks */
2947    /*@{*/
2948    struct gl_matrix_stack ModelviewMatrixStack;
2949    struct gl_matrix_stack ProjectionMatrixStack;
2950    struct gl_matrix_stack ColorMatrixStack;
2951    struct gl_matrix_stack TextureMatrixStack[MAX_TEXTURE_UNITS];
2952    struct gl_matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2953    struct gl_matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2954    /*@}*/
2955
2956    /** Combined modelview and projection matrix */
2957    GLmatrix _ModelProjectMatrix;
2958
2959    /** \name Display lists */
2960    struct gl_dlist_state ListState;
2961
2962    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2963    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2964
2965    /** Extension information */
2966    struct gl_extensions Extensions;
2967
2968    /** \name State attribute stack (for glPush/PopAttrib) */
2969    /*@{*/
2970    GLuint AttribStackDepth;
2971    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2972    /*@}*/
2973
2974    /** \name Renderer attribute groups
2975     *
2976     * We define a struct for each attribute group to make pushing and popping
2977     * attributes easy.  Also it's a good organization.
2978     */
2979    /*@{*/
2980    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
2981    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
2982    struct gl_current_attrib     Current;        /**< Current attributes */
2983    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2984    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2985    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2986    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2987    struct gl_light_attrib       Light;          /**< Light attributes */
2988    struct gl_line_attrib        Line;           /**< Line attributes */
2989    struct gl_list_attrib        List;           /**< List attributes */
2990    struct gl_multisample_attrib Multisample;
2991    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2992    struct gl_point_attrib       Point;          /**< Point attributes */
2993    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2994    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2995    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2996    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2997    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2998    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2999    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
3000    /*@}*/
3001
3002    /** \name Client attribute stack */
3003    /*@{*/
3004    GLuint ClientAttribStackDepth;
3005    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
3006    /*@}*/
3007
3008    /** \name Client attribute groups */
3009    /*@{*/
3010    struct gl_array_attrib       Array;  /**< Vertex arrays */
3011    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
3012    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
3013    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
3014    /*@}*/
3015
3016    /** \name Other assorted state (not pushed/popped on attribute stack) */
3017    /*@{*/
3018    struct gl_pixelmaps          PixelMaps;
3019    struct gl_histogram_attrib   Histogram;
3020    struct gl_minmax_attrib      MinMax;
3021    struct gl_convolution_attrib Convolution1D;
3022    struct gl_convolution_attrib Convolution2D;
3023    struct gl_convolution_attrib Separable2D;
3024
3025    struct gl_evaluators EvalMap;   /**< All evaluators */
3026    struct gl_feedback   Feedback;  /**< Feedback */
3027    struct gl_selection  Select;    /**< Selection */
3028
3029    struct gl_color_table ColorTable[COLORTABLE_MAX];
3030    struct gl_color_table ProxyColorTable[COLORTABLE_MAX];
3031 #if 0
3032    struct gl_color_table PostConvolutionColorTable;
3033    struct gl_color_table ProxyPostConvolutionColorTable;
3034    struct gl_color_table PostColorMatrixColorTable;
3035    struct gl_color_table ProxyPostColorMatrixColorTable;
3036 #endif
3037
3038    struct gl_program_state Program;        /**< for vertex or fragment progs */
3039    struct gl_vertex_program_state VertexProgram;   /**< GL_ARB/NV_vertex_program */
3040    struct gl_fragment_program_state FragmentProgram;  /**< GL_ARB/NV_vertex_program */
3041    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
3042
3043    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
3044
3045    struct gl_shader_state Shader; /**< GLSL shader object state */
3046    /*@}*/
3047
3048 #if FEATURE_EXT_framebuffer_object
3049    struct gl_renderbuffer *CurrentRenderbuffer;
3050 #endif
3051
3052    GLenum ErrorValue;        /**< Last error code */
3053    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
3054    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
3055
3056    GLbitfield varying_vp_inputs;  /**< mask of VERT_BIT_* flags */
3057
3058    /** \name Derived state */
3059    /*@{*/
3060    /** Bitwise-or of DD_* flags.  Note that this bitfield may be used before
3061     * state validation so they need to always be current.
3062     */
3063    GLbitfield _TriangleCaps;
3064    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
3065    GLfloat _EyeZDir[3];
3066    GLfloat _ModelViewInvScale;
3067    GLboolean _NeedEyeCoords;
3068    GLboolean _ForceEyeCoords;
3069    GLenum _CurrentProgram;    /* currently executing program */
3070
3071    GLuint TextureStateTimestamp; /* detect changes to shared state */
3072
3073    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
3074    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
3075    /**@}*/
3076
3077    struct gl_list_extensions ListExt; /**< driver dlist extensions */
3078
3079    /** \name For debugging/development only */
3080    /*@{*/
3081    GLboolean FirstTimeCurrent;
3082    /*@}*/
3083
3084    /** Dither disable via MESA_NO_DITHER env var */
3085    GLboolean NoDither;
3086
3087    /** software compression/decompression supported or not */
3088    GLboolean Mesa_DXTn;
3089
3090    /** Core tnl module support */
3091    struct gl_tnl_module TnlModule;
3092
3093    /**
3094     * \name Hooks for module contexts.
3095     *
3096     * These will eventually live in the driver or elsewhere.
3097     */
3098    /*@{*/
3099    void *swrast_context;
3100    void *swsetup_context;
3101    void *swtnl_context;
3102    void *swtnl_im;
3103    struct st_context *st;
3104    void *aelt_context;
3105    /*@}*/
3106 };
3107
3108
3109 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
3110 extern const char *_mesa_prim_name[GL_POLYGON+4];
3111
3112
3113 #ifdef DEBUG
3114 extern int MESA_VERBOSE;
3115 extern int MESA_DEBUG_FLAGS;
3116 # define MESA_FUNCTION __FUNCTION__
3117 #else
3118 # define MESA_VERBOSE 0
3119 # define MESA_DEBUG_FLAGS 0
3120 # define MESA_FUNCTION "a function"
3121 # ifndef NDEBUG
3122 #  define NDEBUG
3123 # endif
3124 #endif
3125
3126
3127 enum _verbose
3128 {
3129    VERBOSE_VARRAY               = 0x0001,
3130    VERBOSE_TEXTURE              = 0x0002,
3131    VERBOSE_IMMEDIATE            = 0x0004,
3132    VERBOSE_PIPELINE             = 0x0008,
3133    VERBOSE_DRIVER               = 0x0010,
3134    VERBOSE_STATE                = 0x0020,
3135    VERBOSE_API                  = 0x0040,
3136    VERBOSE_DISPLAY_LIST         = 0x0100,
3137    VERBOSE_LIGHTING             = 0x0200,
3138    VERBOSE_PRIMS                = 0x0400,
3139    VERBOSE_VERTS                = 0x0800,
3140    VERBOSE_DISASSEM             = 0x1000,
3141    VERBOSE_GLSL                 = 0x2000,
3142    VERBOSE_GLSL_DUMP            = 0x4000
3143 };
3144
3145
3146 enum _debug
3147 {
3148    DEBUG_ALWAYS_FLUSH           = 0x1
3149 };
3150
3151
3152
3153 #define Elements(x) sizeof(x)/sizeof(*(x))
3154
3155
3156 #endif /* TYPES_H */