src/mesa/main/mtypes.h

   1 /**
   2  * \file mtypes.h
   3  * Main Mesa data structures.
   4  *
   5  * Please try to mark derived values with a leading underscore ('_').
   6  */
   7
   8 /*
   9  * Mesa 3-D graphics library
  10  * Version:  6.5.3
  11  *
  12  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the "Software"),
  16  * to deal in the Software without restriction, including without limitation
  17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  18  * and/or sell copies of the Software, and to permit persons to whom the
  19  * Software is furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice shall be included
  22  * in all copies or substantial portions of the Software.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  25  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  27  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  28  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30  */
  31
  32
  33
  34 #ifndef TYPES_H
  35 #define TYPES_H
  36
  37
  38 #include "glheader.h"
  39 #include <GL/internal/glcore.h> /* __GLcontextModes (GLvisual) */
  40 #include "config.h"             /* Hardwired parameters */
  41 #include "glapi/glapitable.h"
  42 #include "glapi/glthread.h"
  43 #include "math/m_matrix.h"      /* GLmatrix */
  44 #include "bitset.h"
  45
  46
  47 /**
  48  * Special, internal token
  49  */
  50 #define GL_SHADER_PROGRAM_MESA 0x9999
  51
  52
  53 /**
  54  * Color channel data type.
  55  */
  56 #if CHAN_BITS == 8
  57    typedef GLubyte GLchan;
  58 #define CHAN_MAX 255
  59 #define CHAN_MAXF 255.0F
  60 #define CHAN_TYPE GL_UNSIGNED_BYTE
  61 #elif CHAN_BITS == 16
  62    typedef GLushort GLchan;
  63 #define CHAN_MAX 65535
  64 #define CHAN_MAXF 65535.0F
  65 #define CHAN_TYPE GL_UNSIGNED_SHORT
  66 #elif CHAN_BITS == 32
  67    typedef GLfloat GLchan;
  68 #define CHAN_MAX 1.0
  69 #define CHAN_MAXF 1.0F
  70 #define CHAN_TYPE GL_FLOAT
  71 #else
  72 #error "illegal number of color channel bits"
  73 #endif
  74
  75
  76 /**
  77  * Stencil buffer data type.
  78  */
  79 #if STENCIL_BITS==8
  80    typedef GLubyte GLstencil;
  81 #elif STENCIL_BITS==16
  82    typedef GLushort GLstencil;
  83 #else
  84 #  error "illegal number of stencil bits"
  85 #endif
  86
  87
  88 /**
  89  * Fixed point data type.
  90  */
  91 typedef int GLfixed;
  92 /*
  93  * Fixed point arithmetic macros
  94  */
  95 #ifndef FIXED_FRAC_BITS
  96 #define FIXED_FRAC_BITS 11
  97 #endif
  98
  99 #define FIXED_SHIFT     FIXED_FRAC_BITS
 100 #define FIXED_ONE       (1 << FIXED_SHIFT)
 101 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
 102 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
 103 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
 104 #define FIXED_EPSILON   1
 105 #define FIXED_SCALE     ((float) FIXED_ONE)
 106 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 107 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 108 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 109 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 110 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 111 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 112 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 113 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 114 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 115 #define PosFloatToFixed(X)      FloatToFixed(X)
 116 #define SignedFloatToFixed(X)   FloatToFixed(X)
 117
 118
 119
 120 /**
 121  * \name Some forward type declarations
 122  */
 123 /*@{*/
 124 struct _mesa_HashTable;
 125 struct gl_pixelstore_attrib;
 126 struct gl_texture_format;
 127 struct gl_texture_image;
 128 struct gl_texture_object;
 129 struct st_context;
 130 struct pipe_surface;
 131 typedef struct __GLcontextRec GLcontext;
 132 typedef struct __GLcontextModesRec GLvisual;
 133 typedef struct gl_framebuffer GLframebuffer;
 134 /*@}*/
 135
 136
 137
 138 /**
 139  * Indexes for vertex program attributes.
 140  * GL_NV_vertex_program aliases generic attributes over the conventional
 141  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 142  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 143  * generic attributes are distinct/separate).
 144  */
 145 enum
 146 {
 147    VERT_ATTRIB_POS = 0,
 148    VERT_ATTRIB_WEIGHT = 1,
 149    VERT_ATTRIB_NORMAL = 2,
 150    VERT_ATTRIB_COLOR0 = 3,
 151    VERT_ATTRIB_COLOR1 = 4,
 152    VERT_ATTRIB_FOG = 5,
 153    VERT_ATTRIB_COLOR_INDEX = 6,
 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_COORD_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_IMAGE_UNITS];
 728    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 729    /* SGI_texture_color_table */
 730    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_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 SampleAlphaToCoverage;
 964    GLboolean SampleAlphaToOne;
 965    GLboolean SampleCoverage;
 966    GLfloat SampleCoverageValue;
 967    GLboolean SampleCoverageInvert;
 968 };
 969
 970
 971 /**
 972  * A pixelmap (see glPixelMap)
 973  */
 974 struct gl_pixelmap
 975 {
 976    GLint Size;
 977    GLfloat Map[MAX_PIXEL_MAP_TABLE];
 978    GLubyte Map8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 979 };
 980
 981
 982 /**
 983  * Collection of all pixelmaps
 984  */
 985 struct gl_pixelmaps
 986 {
 987    struct gl_pixelmap RtoR;  /**< i.e. GL_PIXEL_MAP_R_TO_R */
 988    struct gl_pixelmap GtoG;
 989    struct gl_pixelmap BtoB;
 990    struct gl_pixelmap AtoA;
 991    struct gl_pixelmap ItoR;
 992    struct gl_pixelmap ItoG;
 993    struct gl_pixelmap ItoB;
 994    struct gl_pixelmap ItoA;
 995    struct gl_pixelmap ItoI;
 996    struct gl_pixelmap StoS;
 997 };
 998
 999
1000 /**
1001  * Pixel attribute group (GL_PIXEL_MODE_BIT).
1002  */
1003 struct gl_pixel_attrib
1004 {
1005    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
1006
1007    /*--- Begin Pixel Transfer State ---*/
1008    /* Fields are in the order in which they're applied... */
1009
1010    /* Scale & Bias (index shift, offset) */
1011    GLfloat RedBias, RedScale;
1012    GLfloat GreenBias, GreenScale;
1013    GLfloat BlueBias, BlueScale;
1014    GLfloat AlphaBias, AlphaScale;
1015    GLfloat DepthBias, DepthScale;
1016    GLint IndexShift, IndexOffset;
1017
1018    /* Pixel Maps */
1019    /* Note: actual pixel maps are not part of this attrib group */
1020    GLboolean MapColorFlag;
1021    GLboolean MapStencilFlag;
1022
1023    /* There are multiple color table stages: */
1024    GLboolean ColorTableEnabled[COLORTABLE_MAX];
1025    GLfloat ColorTableScale[COLORTABLE_MAX][4];  /**< RGBA */
1026    GLfloat ColorTableBias[COLORTABLE_MAX][4];   /**< RGBA */
1027
1028    /* Convolution (GL_EXT_convolution) */
1029    GLboolean Convolution1DEnabled;
1030    GLboolean Convolution2DEnabled;
1031    GLboolean Separable2DEnabled;
1032    GLfloat ConvolutionBorderColor[3][4];
1033    GLenum ConvolutionBorderMode[3];
1034    GLfloat ConvolutionFilterScale[3][4];  /**< RGBA */
1035    GLfloat ConvolutionFilterBias[3][4];   /**< RGBA */
1036    GLfloat PostConvolutionScale[4];  /**< RGBA */
1037    GLfloat PostConvolutionBias[4];   /**< RGBA */
1038
1039    /* Color matrix (GL_SGI_color_matrix) */
1040    /* Note: the color matrix is not part of this attrib group */
1041    GLfloat PostColorMatrixScale[4];  /**< RGBA */
1042    GLfloat PostColorMatrixBias[4];   /**< RGBA */
1043
1044    /* Histogram & minmax (GL_EXT_histogram) */
1045    /* Note: histogram and minmax data are not part of this attrib group */
1046    GLboolean HistogramEnabled;
1047    GLboolean MinMaxEnabled;
1048
1049    /*--- End Pixel Transfer State ---*/
1050
1051    /* Pixel Zoom */
1052    GLfloat ZoomX, ZoomY;
1053
1054    /** GL_SGI_texture_color_table */
1055    GLfloat TextureColorTableScale[4];
1056    GLfloat TextureColorTableBias[4];
1057 };
1058
1059
1060 /**
1061  * Point attribute group (GL_POINT_BIT).
1062  */
1063 struct gl_point_attrib
1064 {
1065    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1066    GLfloat Size;                /**< User-specified point size */
1067    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1068    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1069    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1070    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1071    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
1072    GLboolean CoordReplace[MAX_TEXTURE_COORD_UNITS]; /**< GL_ARB_point_sprite */
1073    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1074    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1075 };
1076
1077
1078 /**
1079  * Polygon attribute group (GL_POLYGON_BIT).
1080  */
1081 struct gl_polygon_attrib
1082 {
1083    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1084    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1085    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1086    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1087    GLboolean CullFlag;          /**< Culling on/off flag */
1088    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1089    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1090    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1091    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1092    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1093    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1094    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1095    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1096 };
1097
1098
1099 /**
1100  * Scissor attributes (GL_SCISSOR_BIT).
1101  */
1102 struct gl_scissor_attrib
1103 {
1104    GLboolean Enabled;           /**< Scissor test enabled? */
1105    GLint X, Y;                  /**< Lower left corner of box */
1106    GLsizei Width, Height;       /**< Size of box */
1107 };
1108
1109
1110 /**
1111  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1112  */
1113 struct gl_stencil_attrib
1114 {
1115    GLboolean Enabled;           /**< Enabled flag */
1116    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1117    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1118    GLboolean _TestTwoSide;
1119    GLenum Function[2];          /**< Stencil function */
1120    GLenum FailFunc[2];          /**< Fail function */
1121    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1122    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1123    GLint Ref[2];                /**< Reference value */
1124    GLuint ValueMask[2];         /**< Value mask */
1125    GLuint WriteMask[2];         /**< Write mask */
1126    GLuint Clear;                /**< Clear value */
1127 };
1128
1129
1130 #define NUM_TEXTURE_TARGETS 7   /* 1D, 2D, 3D, CUBE, RECT, 1D_STACK, and 2D_STACK */
1131
1132 /**
1133  * An index for each type of texture object
1134  */
1135 /*@{*/
1136 #define TEXTURE_1D_INDEX       0
1137 #define TEXTURE_2D_INDEX       1
1138 #define TEXTURE_3D_INDEX       2
1139 #define TEXTURE_CUBE_INDEX     3
1140 #define TEXTURE_RECT_INDEX     4
1141 #define TEXTURE_1D_ARRAY_INDEX 5
1142 #define TEXTURE_2D_ARRAY_INDEX 6
1143 /*@}*/
1144
1145 /**
1146  * Bit flags for each type of texture object
1147  * Used for Texture.Unit[]._ReallyEnabled flags.
1148  */
1149 /*@{*/
1150 #define TEXTURE_1D_BIT       (1 << TEXTURE_1D_INDEX)
1151 #define TEXTURE_2D_BIT       (1 << TEXTURE_2D_INDEX)
1152 #define TEXTURE_3D_BIT       (1 << TEXTURE_3D_INDEX)
1153 #define TEXTURE_CUBE_BIT     (1 << TEXTURE_CUBE_INDEX)
1154 #define TEXTURE_RECT_BIT     (1 << TEXTURE_RECT_INDEX)
1155 #define TEXTURE_1D_ARRAY_BIT (1 << TEXTURE_1D_ARRAY_INDEX)
1156 #define TEXTURE_2D_ARRAY_BIT (1 << TEXTURE_2D_ARRAY_INDEX)
1157 /*@}*/
1158
1159
1160 /**
1161  * TexGenEnabled flags.
1162  */
1163 /*@{*/
1164 #define S_BIT 1
1165 #define T_BIT 2
1166 #define R_BIT 4
1167 #define Q_BIT 8
1168 /*@}*/
1169
1170
1171 /**
1172  * Bit flag versions of the corresponding GL_ constants.
1173  */
1174 /*@{*/
1175 #define TEXGEN_SPHERE_MAP        0x1
1176 #define TEXGEN_OBJ_LINEAR        0x2
1177 #define TEXGEN_EYE_LINEAR        0x4
1178 #define TEXGEN_REFLECTION_MAP_NV 0x8
1179 #define TEXGEN_NORMAL_MAP_NV     0x10
1180
1181 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1182                                   TEXGEN_REFLECTION_MAP_NV | \
1183                                   TEXGEN_NORMAL_MAP_NV)
1184 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1185                                   TEXGEN_REFLECTION_MAP_NV | \
1186                                   TEXGEN_NORMAL_MAP_NV     | \
1187                                   TEXGEN_EYE_LINEAR)
1188 /*@}*/
1189
1190
1191 /* A selection of state flags to make driver and module's lives easier. */
1192 #define ENABLE_TEXGEN0        0x1
1193 #define ENABLE_TEXGEN1        0x2
1194 #define ENABLE_TEXGEN2        0x4
1195 #define ENABLE_TEXGEN3        0x8
1196 #define ENABLE_TEXGEN4        0x10
1197 #define ENABLE_TEXGEN5        0x20
1198 #define ENABLE_TEXGEN6        0x40
1199 #define ENABLE_TEXGEN7        0x80
1200
1201 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1202 #define ENABLE_TEXMAT1        0x2
1203 #define ENABLE_TEXMAT2        0x4
1204 #define ENABLE_TEXMAT3        0x8
1205 #define ENABLE_TEXMAT4        0x10
1206 #define ENABLE_TEXMAT5        0x20
1207 #define ENABLE_TEXMAT6        0x40
1208 #define ENABLE_TEXMAT7        0x80
1209
1210 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1211 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1212
1213
1214 /**
1215  * Texel fetch function prototype.  We use texel fetch functions to
1216  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1217  * texture images.  These functions help to isolate us from the gritty
1218  * details of all the various texture image encodings.
1219  *
1220  * \param texImage texture image.
1221  * \param col texel column.
1222  * \param row texel row.
1223  * \param img texel image level/layer.
1224  * \param texelOut output texel (up to 4 GLchans)
1225  */
1226 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1227                                  GLint col, GLint row, GLint img,
1228                                  GLchan *texelOut );
1229
1230 /**
1231  * As above, but returns floats.
1232  * Used for depth component images and for upcoming signed/float
1233  * texture images.
1234  */
1235 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1236                                  GLint col, GLint row, GLint img,
1237                                  GLfloat *texelOut );
1238
1239
1240 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1241                                GLint col, GLint row, GLint img,
1242                                const void *texel);
1243
1244
1245 /**
1246  * This macro defines the (many) parameters to the texstore functions.
1247  * \param dims  either 1 or 2 or 3
1248  * \param baseInternalFormat  user-specified base internal format
1249  * \param dstFormat  destination Mesa texture format
1250  * \param dstAddr  destination image address
1251  * \param dstX/Y/Zoffset  destination x/y/z offset (ala TexSubImage), in texels
1252  * \param dstRowStride  destination image row stride, in bytes
1253  * \param dstImageOffsets  offset of each 2D slice within 3D texture, in texels
1254  * \param srcWidth/Height/Depth  source image size, in pixels
1255  * \param srcFormat  incoming image format
1256  * \param srcType  incoming image data type
1257  * \param srcAddr  source image address
1258  * \param srcPacking  source image packing parameters
1259  */
1260 #define TEXSTORE_PARAMS \
1261         GLcontext *ctx, GLuint dims, \
1262         GLenum baseInternalFormat, \
1263         const struct gl_texture_format *dstFormat, \
1264         GLvoid *dstAddr, \
1265         GLint dstXoffset, GLint dstYoffset, GLint dstZoffset, \
1266         GLint dstRowStride, const GLuint *dstImageOffsets, \
1267         GLint srcWidth, GLint srcHeight, GLint srcDepth, \
1268         GLenum srcFormat, GLenum srcType, \
1269         const GLvoid *srcAddr, \
1270         const struct gl_pixelstore_attrib *srcPacking
1271
1272
1273
1274 /**
1275  * Texture image storage function.
1276  */
1277 typedef GLboolean (*StoreTexImageFunc)(TEXSTORE_PARAMS);
1278
1279
1280 /**
1281  * Texture format record
1282  */
1283 struct gl_texture_format
1284 {
1285    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1286
1287    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1288                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1289                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1290                                  *   GL_DEPTH_COMPONENT.
1291                                  */
1292    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1293
1294    /**
1295     * Bits per texel component.  These are just rough approximations
1296     * for compressed texture formats.
1297     */
1298    /*@{*/
1299    GLubyte RedBits;
1300    GLubyte GreenBits;
1301    GLubyte BlueBits;
1302    GLubyte AlphaBits;
1303    GLubyte LuminanceBits;
1304    GLubyte IntensityBits;
1305    GLubyte IndexBits;
1306    GLubyte DepthBits;
1307    GLubyte StencilBits;         /**< GL_EXT_packed_depth_stencil */
1308    /*@}*/
1309
1310    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1311
1312    StoreTexImageFunc StoreImage;
1313
1314    /**
1315     * \name Texel fetch function pointers
1316     */
1317    /*@{*/
1318    FetchTexelFuncC FetchTexel1D;
1319    FetchTexelFuncC FetchTexel2D;
1320    FetchTexelFuncC FetchTexel3D;
1321    FetchTexelFuncF FetchTexel1Df;
1322    FetchTexelFuncF FetchTexel2Df;
1323    FetchTexelFuncF FetchTexel3Df;
1324    /*@}*/
1325
1326    StoreTexelFunc StoreTexel;
1327 };
1328
1329
1330 /**
1331  * Texture image state.  Describes the dimensions of a texture image,
1332  * the texel format and pointers to Texel Fetch functions.
1333  */
1334 struct gl_texture_image
1335 {
1336    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1337                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1338                                  *   GL_INTENSITY, GL_COLOR_INDEX,
1339                                  *   GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT
1340                                  *   only. Used for choosing TexEnv arithmetic.
1341                                  */
1342    GLint InternalFormat;        /**< Internal format as given by the user */
1343    GLuint Border;               /**< 0 or 1 */
1344    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1345    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1346    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1347    GLuint Width2;               /**< = Width - 2*Border */
1348    GLuint Height2;              /**< = Height - 2*Border */
1349    GLuint Depth2;               /**< = Depth - 2*Border */
1350    GLuint WidthLog2;            /**< = log2(Width2) */
1351    GLuint HeightLog2;           /**< = log2(Height2) */
1352    GLuint DepthLog2;            /**< = log2(Depth2) */
1353    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1354    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1355    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1356    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1357    GLboolean IsClientData;      /**< Data owned by client? */
1358    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1359
1360    const struct gl_texture_format *TexFormat;
1361
1362    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1363
1364    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1365    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1366
1367    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1368    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1369
1370    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1371    GLuint *ImageOffsets;        /**< if 3D texture: array [Depth] of offsets to
1372                                      each 2D slice in 'Data', in texels */
1373    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1374
1375    /**
1376     * \name For device driver:
1377     */
1378    /*@{*/
1379    void *DriverData;            /**< Arbitrary device driver data */
1380    /*@}*/
1381 };
1382
1383
1384 /**
1385  * Indexes for cube map faces.
1386  */
1387 /*@{*/
1388 #define FACE_POS_X   0
1389 #define FACE_NEG_X   1
1390 #define FACE_POS_Y   2
1391 #define FACE_NEG_Y   3
1392 #define FACE_POS_Z   4
1393 #define FACE_NEG_Z   5
1394 #define MAX_FACES    6
1395 /*@}*/
1396
1397
1398 /**
1399  * Texture object state.  Contains the array of mipmap images, border color,
1400  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1401  * color palette.
1402  */
1403 struct gl_texture_object
1404 {
1405    GLint RefCount;              /**< reference count */
1406    GLuint Name;                 /**< the user-visible texture object ID */
1407    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1408    GLfloat Priority;            /**< in [0,1] */
1409    GLfloat BorderColor[4];      /**< unclamped */
1410    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1411    GLenum WrapS;                /**< S-axis texture image wrap mode */
1412    GLenum WrapT;                /**< T-axis texture image wrap mode */
1413    GLenum WrapR;                /**< R-axis texture image wrap mode */
1414    GLenum MinFilter;            /**< minification filter */
1415    GLenum MagFilter;            /**< magnification filter */
1416    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1417    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1418    GLfloat LodBias;             /**< OpenGL 1.4 */
1419    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1420    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1421    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1422    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1423    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1424    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1425    GLenum CompareMode;          /**< GL_ARB_shadow */
1426    GLenum CompareFunc;          /**< GL_ARB_shadow */
1427    GLenum _Function;            /**< Comparison function derived from
1428                                  * \c CompareOperator, \c CompareMode, and
1429                                  * \c CompareFunc.
1430                                  */
1431    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1432    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1433    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1434    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1435    GLboolean _Complete;         /**< Is texture object complete? */
1436
1437    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1438    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1439
1440    /** GL_EXT_paletted_texture */
1441    struct gl_color_table Palette;
1442
1443
1444    /**
1445     * \name For device driver.
1446     * Note: instead of attaching driver data to this pointer, it's preferable
1447     * to instead use this struct as a base class for your own texture object
1448     * class.  Driver->NewTextureObject() can be used to implement the
1449     * allocation.
1450     */
1451    void *DriverData;    /**< Arbitrary device driver data */
1452 };
1453
1454
1455 /**
1456  * Texture combine environment state.
1457  *
1458  * \todo
1459  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1460  * structure will need to be expanded for 4 elements.
1461  */
1462 struct gl_tex_env_combine_state
1463 {
1464    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1465    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1466    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1467    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1468    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1469    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1470    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1471    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1472    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1473    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1474 };
1475
1476
1477 /**
1478  * Texture unit state.  Contains enable flags, texture environment/function/
1479  * combiners, texgen state, pointers to current texture objects and
1480  * post-filter color tables.
1481  */
1482 struct gl_texture_unit
1483 {
1484    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1485    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1486
1487    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1488    GLfloat EnvColor[4];
1489    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1490    /** \name Tex coord generation mode
1491     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1492    /*@{*/
1493    GLenum GenModeS;
1494    GLenum GenModeT;
1495    GLenum GenModeR;
1496    GLenum GenModeQ;
1497    /*@}*/
1498    GLbitfield _GenBitS;
1499    GLbitfield _GenBitT;
1500    GLbitfield _GenBitR;
1501    GLbitfield _GenBitQ;
1502    GLbitfield _GenFlags;        /**< bitwise or of _GenBit[STRQ] */
1503    GLfloat ObjectPlaneS[4];
1504    GLfloat ObjectPlaneT[4];
1505    GLfloat ObjectPlaneR[4];
1506    GLfloat ObjectPlaneQ[4];
1507    GLfloat EyePlaneS[4];
1508    GLfloat EyePlaneT[4];
1509    GLfloat EyePlaneR[4];
1510    GLfloat EyePlaneQ[4];
1511    GLfloat LodBias;             /**< for biasing mipmap levels */
1512
1513    /**
1514     * \name GL_EXT_texture_env_combine
1515     */
1516    struct gl_tex_env_combine_state Combine;
1517
1518    /**
1519     * Derived state based on \c EnvMode and the \c BaseFormat of the
1520     * currently enabled texture.
1521     */
1522    struct gl_tex_env_combine_state _EnvMode;
1523
1524    /**
1525     * Currently enabled combiner state.  This will point to either
1526     * \c Combine or \c _EnvMode.
1527     */
1528    struct gl_tex_env_combine_state *_CurrentCombine;
1529
1530    struct gl_texture_object *Current1D;
1531    struct gl_texture_object *Current2D;
1532    struct gl_texture_object *Current3D;
1533    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1534    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1535    struct gl_texture_object *Current1DArray; /**< GL_MESA_texture_array */
1536    struct gl_texture_object *Current2DArray; /**< GL_MESA_texture_array */
1537
1538    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1539
1540    /** These are used for glPush/PopAttrib */
1541    /*@{*/
1542    struct gl_texture_object Saved1D;
1543    struct gl_texture_object Saved2D;
1544    struct gl_texture_object Saved3D;
1545    struct gl_texture_object SavedCubeMap;
1546    struct gl_texture_object SavedRect;
1547    struct gl_texture_object Saved1DArray;
1548    struct gl_texture_object Saved2DArray;
1549    /*@}*/
1550
1551    /** GL_SGI_texture_color_table */
1552    /*@{*/
1553    struct gl_color_table ColorTable;
1554    struct gl_color_table ProxyColorTable;
1555    GLboolean ColorTableEnabled;
1556    /*@}*/
1557 };
1558
1559 struct texenvprog_cache_item {
1560    GLuint hash;
1561    void *key;
1562    struct gl_fragment_program *data;
1563    struct texenvprog_cache_item *next;
1564 };
1565
1566 struct texenvprog_cache {
1567    struct texenvprog_cache_item **items;
1568    GLuint size, n_items;
1569    GLcontext *ctx;
1570 };
1571
1572 /**
1573  * Texture attribute group (GL_TEXTURE_BIT).
1574  */
1575 struct gl_texture_attrib
1576 {
1577    /**
1578     * name multitexture
1579     */
1580    /**@{*/
1581    GLuint CurrentUnit;         /**< Active texture unit */
1582    GLbitfield _EnabledUnits;  /**< one bit set for each really-enabled unit */
1583    GLbitfield _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1584    GLbitfield _GenFlags;            /**< for texgen */
1585    GLbitfield _TexGenEnabled;
1586    GLbitfield _TexMatEnabled;
1587    /**@}*/
1588
1589    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1590
1591    struct gl_texture_object *Proxy1D;
1592    struct gl_texture_object *Proxy2D;
1593    struct gl_texture_object *Proxy3D;
1594    struct gl_texture_object *ProxyCubeMap;
1595    struct gl_texture_object *ProxyRect;
1596    struct gl_texture_object *Proxy1DArray;
1597    struct gl_texture_object *Proxy2DArray;
1598
1599    /** GL_EXT_shared_texture_palette */
1600    GLboolean SharedPalette;
1601    struct gl_color_table Palette;
1602
1603    /** Cached texenv fragment programs */
1604    struct texenvprog_cache env_fp_cache;
1605 };
1606
1607
1608 /**
1609  * Transformation attribute group (GL_TRANSFORM_BIT).
1610  */
1611 struct gl_transform_attrib
1612 {
1613    GLenum MatrixMode;                           /**< Matrix mode */
1614    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1615    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1616    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1617    GLboolean Normalize;                         /**< Normalize all normals? */
1618    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1619    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1620
1621    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1622    GLfloat CullEyePos[4];
1623    GLfloat CullObjPos[4];
1624 };
1625
1626
1627 /**
1628  * Viewport attribute group (GL_VIEWPORT_BIT).
1629  */
1630 struct gl_viewport_attrib
1631 {
1632    GLint X, Y;                  /**< position */
1633    GLsizei Width, Height;       /**< size */
1634    GLfloat Near, Far;           /**< Depth buffer range */
1635    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1636 };
1637
1638
1639 /**
1640  * Node for the attribute stack.
1641  */
1642 struct gl_attrib_node
1643 {
1644    GLbitfield kind;
1645    void *data;
1646    struct gl_attrib_node *next;
1647 };
1648
1649
1650 /**
1651  * GL_ARB_vertex/pixel_buffer_object buffer object
1652  */
1653 struct gl_buffer_object
1654 {
1655    GLint RefCount;
1656    GLuint Name;
1657    GLenum Usage;
1658    GLenum Access;
1659    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1660    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1661    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1662    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1663 };
1664
1665
1666
1667 /**
1668  * Client pixel packing/unpacking attributes
1669  */
1670 struct gl_pixelstore_attrib
1671 {
1672    GLint Alignment;
1673    GLint RowLength;
1674    GLint SkipPixels;
1675    GLint SkipRows;
1676    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1677    GLint SkipImages;      /**< for GL_EXT_texture3D */
1678    GLboolean SwapBytes;
1679    GLboolean LsbFirst;
1680    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1681    GLboolean Invert;        /**< GL_MESA_pack_invert */
1682    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1683 };
1684
1685
1686
1687 /**
1688  * Client vertex array attributes
1689  */
1690 struct gl_client_array
1691 {
1692    GLint Size;                  /**< components per element (1,2,3,4) */
1693    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1694    GLsizei Stride;              /**< user-specified stride */
1695    GLsizei StrideB;             /**< actual stride in bytes */
1696    const GLubyte *Ptr;          /**< Points to array data */
1697    GLboolean Enabled;           /**< Enabled flag is a boolean */
1698    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1699
1700    /**< GL_ARB_vertex_buffer_object */
1701    struct gl_buffer_object *BufferObj;
1702    GLuint _MaxElement;
1703 };
1704
1705
1706 /**
1707  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1708  * extension, but a nice encapsulation in any case.
1709  */
1710 struct gl_array_object
1711 {
1712    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1713    GLuint Name;
1714
1715    /** Conventional vertex arrays */
1716    /*@{*/
1717    struct gl_client_array Vertex;
1718    struct gl_client_array Normal;
1719    struct gl_client_array Color;
1720    struct gl_client_array SecondaryColor;
1721    struct gl_client_array FogCoord;
1722    struct gl_client_array Index;
1723    struct gl_client_array EdgeFlag;
1724    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1725    /*@}*/
1726
1727    /** Generic arrays for vertex programs/shaders */
1728    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1729
1730    /** Mask of _NEW_ARRAY_* values indicating which arrays are enabled */
1731    GLbitfield _Enabled;
1732 };
1733
1734
1735 /**
1736  * Vertex array state
1737  */
1738 struct gl_array_attrib
1739 {
1740    struct gl_array_object *ArrayObj;
1741    struct gl_array_object *DefaultArrayObj;
1742
1743    GLint ActiveTexture;         /**< Client Active Texture */
1744    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1745    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1746
1747    GLbitfield NewState;         /**< mask of _NEW_ARRAY_* values */
1748
1749 #if FEATURE_ARB_vertex_buffer_object
1750    struct gl_buffer_object *NullBufferObj;
1751    struct gl_buffer_object *ArrayBufferObj;
1752    struct gl_buffer_object *ElementArrayBufferObj;
1753 #endif
1754    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1755 };
1756
1757
1758 /**
1759  * Feedback buffer state
1760  */
1761 struct gl_feedback
1762 {
1763    GLenum Type;
1764    GLbitfield _Mask;            /* FB_* bits */
1765    GLfloat *Buffer;
1766    GLuint BufferSize;
1767    GLuint Count;
1768 };
1769
1770
1771 /**
1772  * Selection buffer state
1773  */
1774 struct gl_selection
1775 {
1776    GLuint *Buffer;      /**< selection buffer */
1777    GLuint BufferSize;   /**< size of the selection buffer */
1778    GLuint BufferCount;  /**< number of values in the selection buffer */
1779    GLuint Hits;         /**< number of records in the selection buffer */
1780    GLuint NameStackDepth; /**< name stack depth */
1781    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1782    GLboolean HitFlag;   /**< hit flag */
1783    GLfloat HitMinZ;     /**< minimum hit depth */
1784    GLfloat HitMaxZ;     /**< maximum hit depth */
1785 };
1786
1787
1788 /**
1789  * 1-D Evaluator control points
1790  */
1791 struct gl_1d_map
1792 {
1793    GLuint Order;        /**< Number of control points */
1794    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1795    GLfloat *Points;     /**< Points to contiguous control points */
1796 };
1797
1798
1799 /**
1800  * 2-D Evaluator control points
1801  */
1802 struct gl_2d_map
1803 {
1804    GLuint Uorder;               /**< Number of control points in U dimension */
1805    GLuint Vorder;               /**< Number of control points in V dimension */
1806    GLfloat u1, u2, du;
1807    GLfloat v1, v2, dv;
1808    GLfloat *Points;             /**< Points to contiguous control points */
1809 };
1810
1811
1812 /**
1813  * All evaluator control point state
1814  */
1815 struct gl_evaluators
1816 {
1817    /**
1818     * \name 1-D maps
1819     */
1820    /*@{*/
1821    struct gl_1d_map Map1Vertex3;
1822    struct gl_1d_map Map1Vertex4;
1823    struct gl_1d_map Map1Index;
1824    struct gl_1d_map Map1Color4;
1825    struct gl_1d_map Map1Normal;
1826    struct gl_1d_map Map1Texture1;
1827    struct gl_1d_map Map1Texture2;
1828    struct gl_1d_map Map1Texture3;
1829    struct gl_1d_map Map1Texture4;
1830    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1831    /*@}*/
1832
1833    /**
1834     * \name 2-D maps
1835     */
1836    /*@{*/
1837    struct gl_2d_map Map2Vertex3;
1838    struct gl_2d_map Map2Vertex4;
1839    struct gl_2d_map Map2Index;
1840    struct gl_2d_map Map2Color4;
1841    struct gl_2d_map Map2Normal;
1842    struct gl_2d_map Map2Texture1;
1843    struct gl_2d_map Map2Texture2;
1844    struct gl_2d_map Map2Texture3;
1845    struct gl_2d_map Map2Texture4;
1846    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1847    /*@}*/
1848 };
1849
1850
1851 /**
1852  * Names of the various vertex/fragment program register files, etc.
1853  *
1854  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1855  * All values should fit in a 4-bit field.
1856  *
1857  * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
1858  * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
1859  * be "uniform" variables since they can only be set outside glBegin/End.
1860  * They're also all stored in the same Parameters array.
1861  */
1862 enum register_file
1863 {
1864    PROGRAM_TEMPORARY = 0,   /**< machine->Temporary[] */
1865    PROGRAM_LOCAL_PARAM = 1, /**< gl_program->LocalParams[] */
1866    PROGRAM_ENV_PARAM = 2,   /**< gl_program->Parameters[] */
1867    PROGRAM_STATE_VAR = 3,   /**< gl_program->Parameters[] */
1868    PROGRAM_INPUT = 4,       /**< machine->Inputs[] */
1869    PROGRAM_OUTPUT = 5,      /**< machine->Outputs[] */
1870    PROGRAM_NAMED_PARAM = 6, /**< gl_program->Parameters[] */
1871    PROGRAM_CONSTANT = 7,    /**< gl_program->Parameters[] */
1872    PROGRAM_UNIFORM = 8,     /**< gl_program->Parameters[] */
1873    PROGRAM_VARYING = 9,     /**< machine->Inputs[]/Outputs[] */
1874    PROGRAM_WRITE_ONLY = 10, /**< A dummy, write-only register */
1875    PROGRAM_ADDRESS = 11,    /**< machine->AddressReg */
1876    PROGRAM_SAMPLER = 12,    /**< for shader samplers, compile-time only */
1877    PROGRAM_UNDEFINED = 13,  /**< Invalid value */
1878    PROGRAM_FILE_MAX
1879 };
1880
1881
1882 /** Vertex and fragment instructions */
1883 struct prog_instruction;
1884 struct gl_program_parameter_list;
1885
1886
1887 /**
1888  * Base class for any kind of program object
1889  */
1890 struct gl_program
1891 {
1892    GLuint Id;
1893    GLubyte *String;  /**< Null-terminated program text */
1894    GLint RefCount;
1895    GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
1896    GLenum Format;    /**< String encoding format */
1897    GLboolean Resident;
1898
1899    struct prog_instruction *Instructions;
1900
1901    GLbitfield InputsRead;     /**< Bitmask of which input regs are read */
1902    GLbitfield OutputsWritten; /**< Bitmask of which output regs are written to */
1903    GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1904    GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */
1905
1906    /** Named parameters, constants, etc. from program text */
1907    struct gl_program_parameter_list *Parameters;
1908    /** Numbered local parameters */
1909    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1910
1911    /** Vertex/fragment shader varying vars */
1912    struct gl_program_parameter_list *Varying;
1913    /** Vertex program user-defined attributes */
1914    struct gl_program_parameter_list *Attributes;
1915
1916    /** Logical counts */
1917    /*@{*/
1918    GLuint NumInstructions;
1919    GLuint NumTemporaries;
1920    GLuint NumParameters;
1921    GLuint NumAttributes;
1922    GLuint NumAddressRegs;
1923    GLuint NumAluInstructions;
1924    GLuint NumTexInstructions;
1925    GLuint NumTexIndirections;
1926    /*@}*/
1927    /** Native, actual h/w counts */
1928    /*@{*/
1929    GLuint NumNativeInstructions;
1930    GLuint NumNativeTemporaries;
1931    GLuint NumNativeParameters;
1932    GLuint NumNativeAttributes;
1933    GLuint NumNativeAddressRegs;
1934    GLuint NumNativeAluInstructions;
1935    GLuint NumNativeTexInstructions;
1936    GLuint NumNativeTexIndirections;
1937    /*@}*/
1938 };
1939
1940
1941 /** Vertex program object */
1942 struct gl_vertex_program
1943 {
1944    struct gl_program Base;   /**< base class */
1945    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1946    GLboolean IsPositionInvariant;
1947    void *TnlData;               /**< should probably use Base.DriverData */
1948 };
1949
1950
1951 /** Fragment program object */
1952 struct gl_fragment_program
1953 {
1954    struct gl_program Base;   /**< base class */
1955    GLenum FogOption;
1956    GLboolean UsesKill;
1957 };
1958
1959
1960 /**
1961  * State common to vertex and fragment programs.
1962  */
1963 struct gl_program_state
1964 {
1965    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1966    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1967 };
1968
1969
1970 /**
1971  * Context state for vertex programs.
1972  */
1973 struct gl_vertex_program_state
1974 {
1975    GLboolean Enabled;               /**< GL_VERTEX_PROGRAM_ARB/NV */
1976    GLboolean _Enabled;              /**< Enabled and valid program? */
1977    GLboolean PointSizeEnabled;      /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1978    GLboolean TwoSideEnabled;        /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1979    struct gl_vertex_program *Current;  /**< user-bound vertex program */
1980
1981    /** Currently enabled and valid program (including internal programs
1982     * and compiled shader programs).
1983     */
1984    struct gl_vertex_program *_Current;
1985
1986    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1987
1988    /* For GL_NV_vertex_program only: */
1989    GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
1990    GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];
1991
1992    /** Should fixed-function T&L be implemented with a vertex prog? */
1993    GLboolean _MaintainTnlProgram;
1994
1995    /** Program to emulate fixed-function T&L (see above) */
1996    struct gl_vertex_program *_TnlProgram;
1997
1998 #if FEATURE_MESA_program_debug
1999    GLprogramcallbackMESA Callback;
2000    GLvoid *CallbackData;
2001    GLboolean CallbackEnabled;
2002    GLuint CurrentPosition;
2003 #endif
2004 };
2005
2006
2007 /**
2008  * Context state for fragment programs.
2009  */
2010 struct gl_fragment_program_state
2011 {
2012    GLboolean Enabled;     /**< User-set fragment program enable flag */
2013    GLboolean _Enabled;    /**< Fragment program enabled and valid? */
2014    GLboolean _Active;
2015    struct gl_fragment_program *Current;  /**< User-bound fragment program */
2016
2017    /** Currently enabled and valid program (including internal programs
2018     * and compiled shader programs).
2019     */
2020    struct gl_fragment_program *_Current;
2021
2022    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
2023
2024    /** Should fixed-function texturing be implemented with a fragment prog? */
2025    GLboolean _MaintainTexEnvProgram;
2026    GLboolean _UseTexEnvProgram;
2027
2028    /** Program to emulate fixed-function texture env/combine (see above) */
2029    struct gl_fragment_program *_TexEnvProgram;
2030
2031 #if FEATURE_MESA_program_debug
2032    GLprogramcallbackMESA Callback;
2033    GLvoid *CallbackData;
2034    GLboolean CallbackEnabled;
2035    GLuint CurrentPosition;
2036 #endif
2037 };
2038
2039
2040 /**
2041  * ATI_fragment_shader runtime state
2042  */
2043 #define ATI_FS_INPUT_PRIMARY 0
2044 #define ATI_FS_INPUT_SECONDARY 1
2045
2046 struct atifs_instruction;
2047 struct atifs_setupinst;
2048
2049 /**
2050  * ATI fragment shader
2051  */
2052 struct ati_fragment_shader
2053 {
2054    GLuint Id;
2055    GLint RefCount;
2056    struct atifs_instruction *Instructions[2];
2057    struct atifs_setupinst *SetupInst[2];
2058    GLfloat Constants[8][4];
2059    GLbitfield LocalConstDef;  /** Indicates which constants have been set */
2060    GLubyte numArithInstr[2];
2061    GLubyte regsAssigned[2];
2062    GLubyte NumPasses;         /** 1 or 2 */
2063    GLubyte cur_pass;
2064    GLubyte last_optype;
2065    GLboolean interpinp1;
2066    GLboolean isValid;
2067    GLuint swizzlerq;
2068 };
2069
2070 /**
2071  * Context state for GL_ATI_fragment_shader
2072  */
2073 struct gl_ati_fragment_shader_state
2074 {
2075    GLboolean Enabled;
2076    GLboolean _Enabled;                      /** enabled and valid shader? */
2077    GLboolean Compiling;
2078    GLfloat GlobalConstants[8][4];
2079    struct ati_fragment_shader *Current;
2080 };
2081
2082
2083 /**
2084  * Occlusion/timer query object.
2085  */
2086 struct gl_query_object
2087 {
2088    GLenum Target;      /**< The query target, when active */
2089    GLuint Id;          /**< hash table ID/name */
2090    GLuint64EXT Result; /**< the counter */
2091    GLboolean Active;   /**< inside Begin/EndQuery */
2092    GLboolean Ready;    /**< result is ready? */
2093 };
2094
2095
2096 /**
2097  * Context state for query objects.
2098  */
2099 struct gl_query_state
2100 {
2101    struct _mesa_HashTable *QueryObjects;
2102    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2103    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2104 };
2105
2106
2107
2108 /**
2109  * A GLSL shader object.
2110  */
2111 struct gl_shader
2112 {
2113    GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER (first field!) */
2114    GLuint Name;  /**< AKA the handle */
2115    GLint RefCount;  /**< Reference count */
2116    GLboolean DeletePending;
2117
2118    const GLchar *Source;  /**< Source code string */
2119    GLboolean CompileStatus;
2120    GLuint NumPrograms;  /**< size of Programs[] array */
2121    struct gl_program **Programs;  /**< Post-compile assembly code */
2122    GLchar *InfoLog;
2123 };
2124
2125
2126 /**
2127  * A GLSL program object.  Basically a linked collection of "shaders".
2128  */
2129 struct gl_shader_program
2130 {
2131    GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
2132    GLuint Name;  /**< aka handle or ID */
2133    GLint RefCount;  /**< Reference count */
2134    GLboolean DeletePending;
2135
2136    GLuint NumShaders;          /**< number of attached shaders */
2137    struct gl_shader **Shaders; /**< List of attached the shaders */
2138
2139    /* post-link info: */
2140    struct gl_vertex_program *VertexProgram;     /**< Linked vertex program */
2141    struct gl_fragment_program *FragmentProgram; /**< Linked fragment prog */
2142    struct gl_program_parameter_list *Uniforms; /**< Plus constants, etc */
2143    struct gl_program_parameter_list *Varying;
2144    struct gl_program_parameter_list *Attributes; /**< Vertex attributes */
2145    GLboolean LinkStatus;   /**< GL_LINK_STATUS */
2146    GLboolean Validated;
2147    GLchar *InfoLog;
2148 };
2149
2150
2151 /**
2152  * Context state for GLSL vertex/fragment shaders.
2153  */
2154 struct gl_shader_state
2155 {
2156    struct gl_shader_program *CurrentProgram; /**< The user-bound program */
2157    /** Driver-selectable options: */
2158    GLboolean EmitHighLevelInstructions; /**< IF/ELSE/ENDIF vs. BRA, etc. */
2159    GLboolean EmitCondCodes;             /**< Use condition codes? */
2160    GLboolean EmitComments;              /**< Annotated instructions */
2161    void *MemPool;
2162 };
2163
2164
2165 /**
2166  * State which can be shared by multiple contexts:
2167  */
2168 struct gl_shared_state
2169 {
2170    _glthread_Mutex Mutex;                  /**< for thread safety */
2171    GLint RefCount;                         /**< Reference count */
2172    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2173    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2174
2175    /**
2176     * \name Default texture objects (shared by all multi-texture units)
2177     */
2178    /*@{*/
2179    struct gl_texture_object *Default1D;
2180    struct gl_texture_object *Default2D;
2181    struct gl_texture_object *Default3D;
2182    struct gl_texture_object *DefaultCubeMap;
2183    struct gl_texture_object *DefaultRect;
2184    struct gl_texture_object *Default1DArray;
2185    struct gl_texture_object *Default2DArray;
2186    /*@}*/
2187
2188    /**
2189     * \name Thread safety and statechange notification for texture
2190     * objects.
2191     *
2192     * \todo Improve the granularity of locking.
2193     */
2194    /*@{*/
2195    _glthread_Mutex TexMutex;            /**< texobj thread safety */
2196    GLuint TextureStateStamp;            /**< state notification for shared tex */
2197    /*@}*/
2198
2199
2200    /**
2201     * \name Vertex/fragment programs
2202     */
2203    /*@{*/
2204    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2205 #if FEATURE_ARB_vertex_program
2206    struct gl_program *DefaultVertexProgram;
2207 #endif
2208 #if FEATURE_ARB_fragment_program
2209    struct gl_program *DefaultFragmentProgram;
2210 #endif
2211    /*@}*/
2212
2213 #if FEATURE_ATI_fragment_shader
2214    struct _mesa_HashTable *ATIShaders;
2215    struct ati_fragment_shader *DefaultFragmentShader;
2216 #endif
2217
2218 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2219    struct _mesa_HashTable *BufferObjects;
2220 #endif
2221
2222 #if FEATURE_ARB_shader_objects
2223    /** Table of both gl_shader and gl_shader_program objects */
2224    struct _mesa_HashTable *ShaderObjects;
2225 #endif
2226
2227 #if FEATURE_EXT_framebuffer_object
2228    struct _mesa_HashTable *RenderBuffers;
2229    struct _mesa_HashTable *FrameBuffers;
2230 #endif
2231
2232    /** Objects associated with the GL_APPLE_vertex_array_object extension. */
2233    struct _mesa_HashTable *ArrayObjects;
2234
2235    void *DriverData;  /**< Device driver shared state */
2236 };
2237
2238
2239
2240
2241 /**
2242  * A renderbuffer stores colors or depth values or stencil values.
2243  * A framebuffer object will have a collection of these.
2244  * Data are read/written to the buffer with a handful of Get/Put functions.
2245  *
2246  * Instances of this object are allocated with the Driver's NewRenderbuffer
2247  * hook.  Drivers will likely wrap this class inside a driver-specific
2248  * class to simulate inheritance.
2249  */
2250 struct gl_renderbuffer
2251 {
2252 #define RB_MAGIC 0xaabbccdd
2253    int Magic; /** XXX TEMPORARY DEBUG INFO */
2254    _glthread_Mutex Mutex;                  /**< for thread safety */
2255    GLuint ClassID;        /**< Useful for drivers */
2256    GLuint Name;
2257    GLint RefCount;
2258    GLuint Width, Height;
2259    GLenum InternalFormat; /**< The user-specified format */
2260    GLenum _ActualFormat;  /**< The driver-chosen format */
2261    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2262                                GL_STENCIL_INDEX. */
2263    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2264    GLubyte RedBits;      /**< Bits of red per pixel */
2265    GLubyte GreenBits;
2266    GLubyte BlueBits;
2267    GLubyte AlphaBits;
2268    GLubyte IndexBits;
2269    GLubyte DepthBits;
2270    GLubyte StencilBits;
2271    GLvoid *Data;        /**< This may not be used by some kinds of RBs */
2272
2273    /* Used to wrap one renderbuffer around another: */
2274    struct gl_renderbuffer *Wrapped;
2275
2276    /* Delete this renderbuffer */
2277    void (*Delete)(struct gl_renderbuffer *rb);
2278
2279    /* Allocate new storage for this renderbuffer */
2280    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2281                              GLenum internalFormat,
2282                              GLuint width, GLuint height);
2283
2284    /* Lock/Unlock are called before/after calling the Get/Put functions.
2285     * Not sure this is the right place for these yet.
2286    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2287    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2288     */
2289
2290    /* Return a pointer to the element/pixel at (x,y).
2291     * Should return NULL if the buffer memory can't be directly addressed.
2292     */
2293    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2294                        GLint x, GLint y);
2295
2296    /* Get/Read a row of values.
2297     * The values will be of format _BaseFormat and type DataType.
2298     */
2299    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2300                   GLint x, GLint y, void *values);
2301
2302    /* Get/Read values at arbitrary locations.
2303     * The values will be of format _BaseFormat and type DataType.
2304     */
2305    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2306                      const GLint x[], const GLint y[], void *values);
2307
2308    /* Put/Write a row of values.
2309     * The values will be of format _BaseFormat and type DataType.
2310     */
2311    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2312                   GLint x, GLint y, const void *values, const GLubyte *mask);
2313
2314    /* Put/Write a row of RGB values.  This is a special-case routine that's
2315     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2316     * a common case for glDrawPixels and some triangle routines.
2317     * The values will be of format GL_RGB and type DataType.
2318     */
2319    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2320                     GLint x, GLint y, const void *values, const GLubyte *mask);
2321
2322
2323    /* Put/Write a row of identical values.
2324     * The values will be of format _BaseFormat and type DataType.
2325     */
2326    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2327                      GLint x, GLint y, const void *value, const GLubyte *mask);
2328
2329    /* Put/Write values at arbitrary locations.
2330     * The values will be of format _BaseFormat and type DataType.
2331     */
2332    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2333                      const GLint x[], const GLint y[], const void *values,
2334                      const GLubyte *mask);
2335    /* Put/Write identical values at arbitrary locations.
2336     * The values will be of format _BaseFormat and type DataType.
2337     */
2338    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2339                          GLuint count, const GLint x[], const GLint y[],
2340                          const void *value, const GLubyte *mask);
2341 };
2342
2343
2344 /**
2345  * A renderbuffer attachment point points to either a texture object
2346  * (and specifies a mipmap level, cube face or 3D texture slice) or
2347  * points to a renderbuffer.
2348  */
2349 struct gl_renderbuffer_attachment
2350 {
2351    GLenum Type;  /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
2352    GLboolean Complete;
2353
2354    /**
2355     * If \c Type is \c GL_RENDERBUFFER_EXT, this stores a pointer to the
2356     * application supplied renderbuffer object.
2357     */
2358    struct gl_renderbuffer *Renderbuffer;
2359
2360    /**
2361     * If \c Type is \c GL_TEXTURE, this stores a pointer to the application
2362     * supplied texture object.
2363     */
2364    struct gl_texture_object *Texture;
2365    GLuint TextureLevel; /**< Attached mipmap level. */
2366    GLuint CubeMapFace;  /**< 0 .. 5, for cube map textures. */
2367    GLuint Zoffset;      /**< Slice for 3D textures,  or layer for both 1D
2368                          * and 2D array textures */
2369 };
2370
2371
2372 /**
2373  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2374  * In C++ terms, think of this as a base class from which device drivers
2375  * will make derived classes.
2376  */
2377 struct gl_framebuffer
2378 {
2379    _glthread_Mutex Mutex;                  /**< for thread safety */
2380    GLuint Name;      /* if zero, this is a window system framebuffer */
2381    GLint RefCount;
2382    GLboolean DeletePending;
2383
2384    GLvisual Visual;     /**< The framebuffer's visual.
2385                              Immutable if this is a window system buffer.
2386                              Computed from attachments if user-made FBO. */
2387
2388    GLboolean Initialized;
2389
2390    GLuint Width, Height;        /**< size of frame buffer in pixels */
2391
2392    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2393    /*@{*/
2394    GLint _Xmin, _Xmax;  /**< inclusive */
2395    GLint _Ymin, _Ymax;  /**< exclusive */
2396    /*@}*/
2397
2398    /** \name  Derived Z buffer stuff */
2399    /*@{*/
2400    GLuint _DepthMax;    /**< Max depth buffer value */
2401    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2402    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2403    /*@}*/
2404
2405    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2406
2407    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2408    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2409
2410    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2411     * attribute group and GL_PIXEL attribute group, respectively.
2412     */
2413    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2414    GLenum ColorReadBuffer;
2415
2416    /* These are computed from ColorDrawBuffer and ColorReadBuffer */
2417    GLbitfield _ColorDrawBufferMask[MAX_DRAW_BUFFERS]; /* Mask of BUFFER_BIT_* flags */
2418    GLint _ColorReadBufferIndex; /* -1 = None */
2419
2420    /* These are computed from _ColorDrawBufferMask and _ColorReadBufferIndex */
2421    GLuint _NumColorDrawBuffers[MAX_DRAW_BUFFERS];
2422    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS][4];
2423    struct gl_renderbuffer *_ColorReadBuffer;
2424
2425    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2426     * depth/stencil buffers attached above. */
2427    struct gl_renderbuffer *_DepthBuffer;
2428    struct gl_renderbuffer *_StencilBuffer;
2429
2430    /** Delete this framebuffer */
2431    void (*Delete)(struct gl_framebuffer *fb);
2432 };
2433
2434
2435 /**
2436  * Limits for vertex and fragment programs.
2437  */
2438 struct gl_program_constants
2439 {
2440    /* logical limits */
2441    GLuint MaxInstructions;
2442    GLuint MaxAluInstructions; /* fragment programs only, for now */
2443    GLuint MaxTexInstructions; /* fragment programs only, for now */
2444    GLuint MaxTexIndirections; /* fragment programs only, for now */
2445    GLuint MaxAttribs;
2446    GLuint MaxTemps;
2447    GLuint MaxAddressRegs; /* vertex program only, for now */
2448    GLuint MaxParameters;
2449    GLuint MaxLocalParams;
2450    GLuint MaxEnvParams;
2451    /* native/hardware limits */
2452    GLuint MaxNativeInstructions;
2453    GLuint MaxNativeAluInstructions; /* fragment programs only, for now */
2454    GLuint MaxNativeTexInstructions; /* fragment programs only, for now */
2455    GLuint MaxNativeTexIndirections; /* fragment programs only, for now */
2456    GLuint MaxNativeAttribs;
2457    GLuint MaxNativeTemps;
2458    GLuint MaxNativeAddressRegs; /* vertex program only, for now */
2459    GLuint MaxNativeParameters;
2460    /* For shaders */
2461    GLuint MaxUniformComponents;
2462 };
2463
2464
2465 /**
2466  * Constants which may be overridden by device driver during context creation
2467  * but are never changed after that.
2468  */
2469 struct gl_constants
2470 {
2471    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2472    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2473    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2474    GLint MaxArrayTextureLayers;         /**< Maximum number of layers in an array texture. */
2475    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2476    GLuint MaxTextureCoordUnits;
2477    GLuint MaxTextureImageUnits;
2478    GLuint MaxTextureUnits;              /* = MIN(CoordUnits, ImageUnits) */
2479    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2480    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2481    GLuint MaxArrayLockSize;
2482    GLint SubPixelBits;
2483    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2484    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2485    GLfloat PointSizeGranularity;
2486    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2487    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2488    GLfloat LineWidthGranularity;
2489    GLuint MaxColorTableSize;
2490    GLuint MaxConvolutionWidth;
2491    GLuint MaxConvolutionHeight;
2492    GLuint MaxClipPlanes;
2493    GLuint MaxLights;
2494    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2495    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2496    GLuint MaxViewportWidth, MaxViewportHeight;
2497    struct gl_program_constants VertexProgram;    /* GL_ARB_vertex_program */
2498    struct gl_program_constants FragmentProgram;  /* GL_ARB_fragment_program */
2499    /* shared by vertex and fragment program: */
2500    GLuint MaxProgramMatrices;
2501    GLuint MaxProgramMatrixStackDepth;
2502    /* vertex array / buffer object bounds checking */
2503    GLboolean CheckArrayBounds;
2504    /* GL_ARB_draw_buffers */
2505    GLuint MaxDrawBuffers;
2506    /* GL_OES_read_format */
2507    GLenum ColorReadFormat;
2508    GLenum ColorReadType;
2509    /* GL_EXT_framebuffer_object */
2510    GLuint MaxColorAttachments;
2511    GLuint MaxRenderbufferSize;
2512    /* GL_ARB_vertex_shader */
2513    GLuint MaxVertexTextureImageUnits;
2514    GLuint MaxVarying;
2515 };
2516
2517
2518 /**
2519  * Enable flag for each OpenGL extension.  Different device drivers will
2520  * enable different extensions at runtime.
2521  */
2522 struct gl_extensions
2523 {
2524    /**
2525     * \name Flags to quickly test if certain extensions are available.
2526     *
2527     * Not every extension needs to have such a flag, but it's encouraged.
2528     */
2529    /*@{*/
2530    GLboolean dummy;  /* don't remove this! */
2531    GLboolean ARB_depth_texture;
2532    GLboolean ARB_draw_buffers;
2533    GLboolean ARB_fragment_program;
2534    GLboolean ARB_fragment_program_shadow;
2535    GLboolean ARB_fragment_shader;
2536    GLboolean ARB_half_float_pixel;
2537    GLboolean ARB_imaging;
2538    GLboolean ARB_multisample;
2539    GLboolean ARB_multitexture;
2540    GLboolean ARB_occlusion_query;
2541    GLboolean ARB_point_sprite;
2542    GLboolean ARB_shader_objects;
2543    GLboolean ARB_shading_language_100;
2544    GLboolean ARB_shading_language_120;
2545    GLboolean ARB_shadow;
2546    GLboolean ARB_texture_border_clamp;
2547    GLboolean ARB_texture_compression;
2548    GLboolean ARB_texture_cube_map;
2549    GLboolean ARB_texture_env_combine;
2550    GLboolean ARB_texture_env_crossbar;
2551    GLboolean ARB_texture_env_dot3;
2552    GLboolean ARB_texture_float;
2553    GLboolean ARB_texture_mirrored_repeat;
2554    GLboolean ARB_texture_non_power_of_two;
2555    GLboolean ARB_transpose_matrix;
2556    GLboolean ARB_vertex_buffer_object;
2557    GLboolean ARB_vertex_program;
2558    GLboolean ARB_vertex_shader;
2559    GLboolean ARB_window_pos;
2560    GLboolean EXT_abgr;
2561    GLboolean EXT_bgra;
2562    GLboolean EXT_blend_color;
2563    GLboolean EXT_blend_equation_separate;
2564    GLboolean EXT_blend_func_separate;
2565    GLboolean EXT_blend_logic_op;
2566    GLboolean EXT_blend_minmax;
2567    GLboolean EXT_blend_subtract;
2568    GLboolean EXT_clip_volume_hint;
2569    GLboolean EXT_cull_vertex;
2570    GLboolean EXT_convolution;
2571    GLboolean EXT_compiled_vertex_array;
2572    GLboolean EXT_copy_texture;
2573    GLboolean EXT_depth_bounds_test;
2574    GLboolean EXT_draw_range_elements;
2575    GLboolean EXT_framebuffer_object;
2576    GLboolean EXT_fog_coord;
2577    GLboolean EXT_framebuffer_blit;
2578    GLboolean EXT_gpu_program_parameters;
2579    GLboolean EXT_histogram;
2580    GLboolean EXT_multi_draw_arrays;
2581    GLboolean EXT_paletted_texture;
2582    GLboolean EXT_packed_depth_stencil;
2583    GLboolean EXT_packed_pixels;
2584    GLboolean EXT_pixel_buffer_object;
2585    GLboolean EXT_point_parameters;
2586    GLboolean EXT_polygon_offset;
2587    GLboolean EXT_rescale_normal;
2588    GLboolean EXT_shadow_funcs;
2589    GLboolean EXT_secondary_color;
2590    GLboolean EXT_separate_specular_color;
2591    GLboolean EXT_shared_texture_palette;
2592    GLboolean EXT_stencil_wrap;
2593    GLboolean EXT_stencil_two_side;
2594    GLboolean EXT_subtexture;
2595    GLboolean EXT_texture;
2596    GLboolean EXT_texture_object;
2597    GLboolean EXT_texture3D;
2598    GLboolean EXT_texture_compression_s3tc;
2599    GLboolean EXT_texture_env_add;
2600    GLboolean EXT_texture_env_combine;
2601    GLboolean EXT_texture_env_dot3;
2602    GLboolean EXT_texture_filter_anisotropic;
2603    GLboolean EXT_texture_lod_bias;
2604    GLboolean EXT_texture_mirror_clamp;
2605    GLboolean EXT_texture_sRGB;
2606    GLboolean EXT_timer_query;
2607    GLboolean EXT_vertex_array;
2608    GLboolean EXT_vertex_array_set;
2609    /* vendor extensions */
2610    GLboolean APPLE_client_storage;
2611    GLboolean APPLE_packed_pixels;
2612    GLboolean APPLE_vertex_array_object;
2613    GLboolean ATI_texture_mirror_once;
2614    GLboolean ATI_texture_env_combine3;
2615    GLboolean ATI_fragment_shader;
2616    GLboolean ATI_separate_stencil;
2617    GLboolean IBM_rasterpos_clip;
2618    GLboolean IBM_multimode_draw_arrays;
2619    GLboolean MESA_pack_invert;
2620    GLboolean MESA_packed_depth_stencil;
2621    GLboolean MESA_program_debug;
2622    GLboolean MESA_resize_buffers;
2623    GLboolean MESA_ycbcr_texture;
2624    GLboolean MESA_texture_array;
2625    GLboolean NV_blend_square;
2626    GLboolean NV_fragment_program;
2627    GLboolean NV_light_max_exponent;
2628    GLboolean NV_point_sprite;
2629    GLboolean NV_texgen_reflection;
2630    GLboolean NV_texture_rectangle;
2631    GLboolean NV_vertex_program;
2632    GLboolean NV_vertex_program1_1;
2633    GLboolean OES_read_format;
2634    GLboolean SGI_color_matrix;
2635    GLboolean SGI_color_table;
2636    GLboolean SGI_texture_color_table;
2637    GLboolean SGIS_generate_mipmap;
2638    GLboolean SGIS_texture_edge_clamp;
2639    GLboolean SGIS_texture_lod;
2640    GLboolean SGIX_depth_texture;
2641    GLboolean SGIX_shadow;
2642    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2643    GLboolean TDFX_texture_compression_FXT1;
2644    GLboolean S3_s3tc;
2645    /*@}*/
2646    /* The extension string */
2647    const GLubyte *String;
2648 };
2649
2650
2651 /**
2652  * A stack of matrices (projection, modelview, color, texture, etc).
2653  */
2654 struct gl_matrix_stack
2655 {
2656    GLmatrix *Top;      /**< points into Stack */
2657    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2658    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2659    GLuint MaxDepth;    /**< size of Stack[] array */
2660    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2661 };
2662
2663
2664 /**
2665  * \name Bits for image transfer operations
2666  *
2667  * \sa __GLcontextRec::ImageTransferState.
2668  */
2669 /*@{*/
2670 #define IMAGE_SCALE_BIAS_BIT                      0x1
2671 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2672 #define IMAGE_MAP_COLOR_BIT                       0x4
2673 #define IMAGE_COLOR_TABLE_BIT                     0x8
2674 #define IMAGE_CONVOLUTION_BIT                     0x10
2675 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2676 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2677 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2678 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2679 #define IMAGE_HISTOGRAM_BIT                       0x200
2680 #define IMAGE_MIN_MAX_BIT                         0x400
2681 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2682
2683
2684 /** Pixel Transfer ops up to convolution */
2685 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2686                                     IMAGE_SHIFT_OFFSET_BIT |   \
2687                                     IMAGE_MAP_COLOR_BIT |      \
2688                                     IMAGE_COLOR_TABLE_BIT)
2689
2690 /** Pixel transfer ops after convolution */
2691 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2692                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2693                                      IMAGE_COLOR_MATRIX_BIT |                 \
2694                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2695                                      IMAGE_HISTOGRAM_BIT |                    \
2696                                      IMAGE_MIN_MAX_BIT)
2697 /*@}*/
2698
2699
2700 /**
2701  * \name Bits to indicate what state has changed.
2702  *
2703  * 4 unused flags.
2704  */
2705 /*@{*/
2706 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2707 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2708 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2709 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2710 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2711 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2712 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2713 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2714 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2715 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2716 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2717 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2718 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2719 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2720 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2721 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2722 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2723 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2724 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2725 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2726 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2727 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2728 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2729 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2730 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2731 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2732 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2733 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2734 #define _NEW_ALL ~0
2735 /*@}*/
2736
2737
2738 /**
2739  * \name Bits to track array state changes
2740  *
2741  * Also used to summarize array enabled.
2742  */
2743 /*@{*/
2744 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2745 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2746 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2747 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2748 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2749 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2750 #define _NEW_ARRAY_INDEX            VERT_BIT_COLOR_INDEX
2751 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_EDGEFLAG
2752 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2753 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2754 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2755 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2756 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2757 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2758 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2759 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2760 #define _NEW_ARRAY_ATTRIB_0         VERT_BIT_GENERIC0  /* start at bit 16 */
2761 #define _NEW_ARRAY_ALL              0xffffffff
2762
2763
2764 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2765 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2766 /*@}*/
2767
2768
2769 /**
2770  * \name A bunch of flags that we think might be useful to drivers.
2771  *
2772  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2773  */
2774 /*@{*/
2775 #define DD_FLATSHADE                0x1
2776 #define DD_SEPARATE_SPECULAR        0x2
2777 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2778 #define DD_TRI_LIGHT_TWOSIDE        0x8
2779 #define DD_TRI_UNFILLED             0x10
2780 #define DD_TRI_SMOOTH               0x20
2781 #define DD_TRI_STIPPLE              0x40
2782 #define DD_TRI_OFFSET               0x80
2783 #define DD_LINE_SMOOTH              0x100
2784 #define DD_LINE_STIPPLE             0x200
2785 #define DD_LINE_WIDTH               0x400
2786 #define DD_POINT_SMOOTH             0x800
2787 #define DD_POINT_SIZE               0x1000
2788 #define DD_POINT_ATTEN              0x2000
2789 #define DD_TRI_TWOSTENCIL           0x4000
2790 /*@}*/
2791
2792
2793 /**
2794  * \name Define the state changes under which each of these bits might change
2795  */
2796 /*@{*/
2797 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2798 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2799 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2800 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2801 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2802 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2803 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2804 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2805 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2806 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2807 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2808 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2809 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2810 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2811 /*@}*/
2812
2813
2814 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2815                                            _NEW_TEXTURE |       \
2816                                            _NEW_POINT |         \
2817                                            _NEW_PROGRAM |       \
2818                                            _NEW_MODELVIEW)
2819
2820 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2821                                            _NEW_TEXTURE)
2822
2823 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2824
2825
2826
2827
2828 /*
2829  * Forward declaration of display list data types:
2830  */
2831 union node;
2832 typedef union node Node;
2833
2834
2835 /* This has to be included here. */
2836 #include "dd.h"
2837
2838
2839 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2840
2841 /**
2842  * Core Mesa's support for tnl modules:
2843  */
2844 struct gl_tnl_module
2845 {
2846    /**
2847     * Vertex format to be lazily swapped into current dispatch.
2848     */
2849    const GLvertexformat *Current;
2850
2851    /**
2852     * \name Record of functions swapped out.
2853     * On restore, only need to swap these functions back in.
2854     */
2855    /*@{*/
2856    struct {
2857        _glapi_proc * location;
2858        _glapi_proc function;
2859    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2860    GLuint SwapCount;
2861    /*@}*/
2862 };
2863
2864 /* Strictly this is a tnl/ private concept, but it doesn't seem
2865  * worthwhile adding a tnl private structure just to hold this one bit
2866  * of information:
2867  */
2868 #define MESA_DLIST_DANGLING_REFS     0x1
2869
2870 /* Provide a location where information about a display list can be
2871  * collected.  Could be extended with driverPrivate structures,
2872  * etc. in the future.
2873  */
2874 struct mesa_display_list
2875 {
2876    Node *node;
2877    GLuint id;
2878    GLbitfield flags;
2879 };
2880
2881
2882 /**
2883  * State used during display list compilation and execution.
2884  */
2885 struct gl_dlist_state
2886 {
2887    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2888    GLuint CallDepth;            /**< Current recursion calling depth */
2889
2890    struct mesa_display_list *CurrentList;
2891    Node *CurrentListPtr;        /**< Head of list being compiled */
2892    GLuint CurrentListNum;       /**< Number of the list being compiled */
2893    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2894    GLuint CurrentPos;           /**< Index into current block of nodes */
2895
2896    GLvertexformat ListVtxfmt;
2897
2898    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2899    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2900
2901    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2902    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2903
2904    GLubyte ActiveIndex;
2905    GLfloat CurrentIndex;
2906
2907    GLubyte ActiveEdgeFlag;
2908    GLboolean CurrentEdgeFlag;
2909 };
2910
2911
2912 /**
2913  * Mesa rendering context.
2914  *
2915  * This is the central context data structure for Mesa.  Almost all
2916  * OpenGL state is contained in this structure.
2917  * Think of this as a base class from which device drivers will derive
2918  * sub classes.
2919  *
2920  * The GLcontext typedef names this structure.
2921  */
2922 struct __GLcontextRec
2923 {
2924    /** State possibly shared with other contexts in the address space */
2925    struct gl_shared_state *Shared;
2926
2927    /** \name API function pointer tables */
2928    /*@{*/
2929    struct _glapi_table *Save;   /**< Display list save functions */
2930    struct _glapi_table *Exec;   /**< Execute functions */
2931    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2932    /*@}*/
2933
2934    GLvisual Visual;
2935    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2936    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2937    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2938    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2939
2940    /**
2941     * Device driver function pointer table
2942     */
2943    struct dd_function_table Driver;
2944
2945    void *DriverCtx;     /**< Points to device driver context/state */
2946
2947    /** Core/Driver constants */
2948    struct gl_constants Const;
2949
2950    /** \name The various 4x4 matrix stacks */
2951    /*@{*/
2952    struct gl_matrix_stack ModelviewMatrixStack;
2953    struct gl_matrix_stack ProjectionMatrixStack;
2954    struct gl_matrix_stack ColorMatrixStack;
2955    struct gl_matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2956    struct gl_matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2957    struct gl_matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2958    /*@}*/
2959
2960    /** Combined modelview and projection matrix */
2961    GLmatrix _ModelProjectMatrix;
2962
2963    /** \name Display lists */
2964    struct gl_dlist_state ListState;
2965
2966    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2967    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2968
2969    /** Extension information */
2970    struct gl_extensions Extensions;
2971
2972    /** \name State attribute stack (for glPush/PopAttrib) */
2973    /*@{*/
2974    GLuint AttribStackDepth;
2975    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2976    /*@}*/
2977
2978    /** \name Renderer attribute groups
2979     *
2980     * We define a struct for each attribute group to make pushing and popping
2981     * attributes easy.  Also it's a good organization.
2982     */
2983    /*@{*/
2984    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
2985    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
2986    struct gl_current_attrib     Current;        /**< Current attributes */
2987    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2988    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2989    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2990    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2991    struct gl_light_attrib       Light;          /**< Light attributes */
2992    struct gl_line_attrib        Line;           /**< Line attributes */
2993    struct gl_list_attrib        List;           /**< List attributes */
2994    struct gl_multisample_attrib Multisample;
2995    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2996    struct gl_point_attrib       Point;          /**< Point attributes */
2997    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2998    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2999    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
3000    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
3001    struct gl_texture_attrib     Texture;        /**< Texture attributes */
3002    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
3003    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
3004    /*@}*/
3005
3006    /** \name Client attribute stack */
3007    /*@{*/
3008    GLuint ClientAttribStackDepth;
3009    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
3010    /*@}*/
3011
3012    /** \name Client attribute groups */
3013    /*@{*/
3014    struct gl_array_attrib       Array;  /**< Vertex arrays */
3015    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
3016    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
3017    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
3018    /*@}*/
3019
3020    /** \name Other assorted state (not pushed/popped on attribute stack) */
3021    /*@{*/
3022    struct gl_pixelmaps          PixelMaps;
3023    struct gl_histogram_attrib   Histogram;
3024    struct gl_minmax_attrib      MinMax;
3025    struct gl_convolution_attrib Convolution1D;
3026    struct gl_convolution_attrib Convolution2D;
3027    struct gl_convolution_attrib Separable2D;
3028
3029    struct gl_evaluators EvalMap;   /**< All evaluators */
3030    struct gl_feedback   Feedback;  /**< Feedback */
3031    struct gl_selection  Select;    /**< Selection */
3032
3033    struct gl_color_table ColorTable[COLORTABLE_MAX];
3034    struct gl_color_table ProxyColorTable[COLORTABLE_MAX];
3035 #if 0
3036    struct gl_color_table PostConvolutionColorTable;
3037    struct gl_color_table ProxyPostConvolutionColorTable;
3038    struct gl_color_table PostColorMatrixColorTable;
3039    struct gl_color_table ProxyPostColorMatrixColorTable;
3040 #endif
3041
3042    struct gl_program_state Program;        /**< for vertex or fragment progs */
3043    struct gl_vertex_program_state VertexProgram;   /**< GL_ARB/NV_vertex_program */
3044    struct gl_fragment_program_state FragmentProgram;  /**< GL_ARB/NV_vertex_program */
3045    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
3046
3047    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
3048
3049    struct gl_shader_state Shader; /**< GLSL shader object state */
3050    /*@}*/
3051
3052 #if FEATURE_EXT_framebuffer_object
3053    struct gl_renderbuffer *CurrentRenderbuffer;
3054 #endif
3055
3056    GLenum ErrorValue;        /**< Last error code */
3057    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
3058    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
3059
3060    /** \name Derived state */
3061    /*@{*/
3062    GLbitfield _TriangleCaps;      /**< bitwise-or of DD_* flags */
3063    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
3064    GLfloat _EyeZDir[3];
3065    GLfloat _ModelViewInvScale;
3066    GLboolean _NeedEyeCoords;
3067    GLboolean _ForceEyeCoords;
3068    GLenum _CurrentProgram;    /* currently executing program */
3069
3070    GLuint TextureStateTimestamp; /* detect changes to shared state */
3071
3072    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
3073    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
3074    /**@}*/
3075
3076    struct gl_list_extensions ListExt; /**< driver dlist extensions */
3077
3078
3079    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
3080                     *
3081                     * We don't have a better way to communicate this value from
3082                     * swrast_setup to swrast. */
3083
3084    /** \name For debugging/development only */
3085    /*@{*/
3086    GLboolean FirstTimeCurrent;
3087    /*@}*/
3088
3089    /** Dither disable via MESA_NO_DITHER env var */
3090    GLboolean NoDither;
3091
3092    /** software compression/decompression supported or not */
3093    GLboolean Mesa_DXTn;
3094
3095    /** Core tnl module support */
3096    struct gl_tnl_module TnlModule;
3097
3098    /**
3099     * \name Hooks for module contexts.
3100     *
3101     * These will eventually live in the driver or elsewhere.
3102     */
3103    /*@{*/
3104    void *swrast_context;
3105    void *swsetup_context;
3106    void *swtnl_context;
3107    void *swtnl_im;
3108    struct st_context *st;
3109    void *aelt_context;
3110    /*@}*/
3111 };
3112
3113
3114 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
3115 extern const char *_mesa_prim_name[GL_POLYGON+4];
3116
3117
3118 #ifdef DEBUG
3119 extern int MESA_VERBOSE;
3120 extern int MESA_DEBUG_FLAGS;
3121 # define MESA_FUNCTION __FUNCTION__
3122 #else
3123 # define MESA_VERBOSE 0
3124 # define MESA_DEBUG_FLAGS 0
3125 # define MESA_FUNCTION "a function"
3126 # ifndef NDEBUG
3127 #  define NDEBUG
3128 # endif
3129 #endif
3130
3131
3132 enum _verbose
3133 {
3134    VERBOSE_VARRAY               = 0x0001,
3135    VERBOSE_TEXTURE              = 0x0002,
3136    VERBOSE_IMMEDIATE            = 0x0004,
3137    VERBOSE_PIPELINE             = 0x0008,
3138    VERBOSE_DRIVER               = 0x0010,
3139    VERBOSE_STATE                = 0x0020,
3140    VERBOSE_API                  = 0x0040,
3141    VERBOSE_DISPLAY_LIST         = 0x0100,
3142    VERBOSE_LIGHTING             = 0x0200,
3143    VERBOSE_PRIMS                = 0x0400,
3144    VERBOSE_VERTS                = 0x0800,
3145    VERBOSE_DISASSEM             = 0x1000
3146 };
3147
3148
3149 enum _debug
3150 {
3151    DEBUG_ALWAYS_FLUSH           = 0x1
3152 };
3153
3154
3155
3156 #define Elements(x) sizeof(x)/sizeof(*(x))
3157
3158
3159 #endif /* TYPES_H */