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
  11  *
  12  * Copyright (C) 1999-2006  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> /* GLimports/GLexports/GLcontextModes */
  40 #include "config.h"             /* Hardwired parameters */
  41 #include "glapitable.h"
  42 #include "glthread.h"
  43 #include "math/m_matrix.h"      /* GLmatrix */
  44 #include "bitset.h"
  45
  46
  47 /**
  48  * Color channel data type.
  49  */
  50 #if CHAN_BITS == 8
  51    typedef GLubyte GLchan;
  52 #define CHAN_MAX 255
  53 #define CHAN_MAXF 255.0F
  54 #define CHAN_TYPE GL_UNSIGNED_BYTE
  55 #elif CHAN_BITS == 16
  56    typedef GLushort GLchan;
  57 #define CHAN_MAX 65535
  58 #define CHAN_MAXF 65535.0F
  59 #define CHAN_TYPE GL_UNSIGNED_SHORT
  60 #elif CHAN_BITS == 32
  61    typedef GLfloat GLchan;
  62 #define CHAN_MAX 1.0
  63 #define CHAN_MAXF 1.0F
  64 #define CHAN_TYPE GL_FLOAT
  65 #else
  66 #error "illegal number of color channel bits"
  67 #endif
  68
  69
  70 /**
  71  * Stencil buffer data type.
  72  */
  73 #if STENCIL_BITS==8
  74    typedef GLubyte GLstencil;
  75 #elif STENCIL_BITS==16
  76    typedef GLushort GLstencil;
  77 #else
  78 #  error "illegal number of stencil bits"
  79 #endif
  80
  81
  82 /**
  83  * Fixed point data type.
  84  */
  85 typedef int GLfixed;
  86 /*
  87  * Fixed point arithmetic macros
  88  */
  89 #ifndef FIXED_FRAC_BITS
  90 #define FIXED_FRAC_BITS 11
  91 #endif
  92
  93 #define FIXED_SHIFT     FIXED_FRAC_BITS
  94 #define FIXED_ONE       (1 << FIXED_SHIFT)
  95 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
  96 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
  97 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
  98 #define FIXED_EPSILON   1
  99 #define FIXED_SCALE     ((float) FIXED_ONE)
 100 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 101 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 102 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 103 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 104 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 105 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 106 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 107 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 108 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 109 #define PosFloatToFixed(X)      FloatToFixed(X)
 110 #define SignedFloatToFixed(X)   FloatToFixed(X)
 111
 112
 113
 114 /**
 115  * \name Some forward type declarations
 116  */
 117 /*@{*/
 118 struct _mesa_HashTable;
 119 struct gl_pixelstore_attrib;
 120 struct gl_texture_format;
 121 struct gl_texture_image;
 122 struct gl_texture_object;
 123 typedef struct __GLcontextRec GLcontext;
 124 typedef struct __GLcontextModesRec GLvisual;
 125 typedef struct gl_framebuffer GLframebuffer;
 126 /*@}*/
 127
 128
 129
 130 /**
 131  * Indexes for vertex program attributes.
 132  * GL_NV_vertex_program aliases generic attributes over the conventional
 133  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 134  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 135  * generic attributes are distinct/separate).
 136  */
 137 enum
 138 {
 139    VERT_ATTRIB_POS = 0,
 140    VERT_ATTRIB_WEIGHT = 1,
 141    VERT_ATTRIB_NORMAL = 2,
 142    VERT_ATTRIB_COLOR0 = 3,
 143    VERT_ATTRIB_COLOR1 = 4,
 144    VERT_ATTRIB_FOG = 5,
 145    VERT_ATTRIB_COLOR_INDEX = 6,
 146    VERT_ATTRIB_EDGEFLAG = 7,
 147    VERT_ATTRIB_TEX0 = 8,
 148    VERT_ATTRIB_TEX1 = 9,
 149    VERT_ATTRIB_TEX2 = 10,
 150    VERT_ATTRIB_TEX3 = 11,
 151    VERT_ATTRIB_TEX4 = 12,
 152    VERT_ATTRIB_TEX5 = 13,
 153    VERT_ATTRIB_TEX6 = 14,
 154    VERT_ATTRIB_TEX7 = 15,
 155    VERT_ATTRIB_GENERIC0 = 16,
 156    VERT_ATTRIB_GENERIC1 = 17,
 157    VERT_ATTRIB_GENERIC2 = 18,
 158    VERT_ATTRIB_GENERIC3 = 19,
 159    VERT_ATTRIB_GENERIC4 = 20,
 160    VERT_ATTRIB_GENERIC5 = 21,
 161    VERT_ATTRIB_GENERIC6 = 22,
 162    VERT_ATTRIB_GENERIC7 = 23,
 163    VERT_ATTRIB_GENERIC8 = 24,
 164    VERT_ATTRIB_GENERIC9 = 25,
 165    VERT_ATTRIB_GENERIC10 = 26,
 166    VERT_ATTRIB_GENERIC11 = 27,
 167    VERT_ATTRIB_GENERIC12 = 28,
 168    VERT_ATTRIB_GENERIC13 = 29,
 169    VERT_ATTRIB_GENERIC14 = 30,
 170    VERT_ATTRIB_GENERIC15 = 31,
 171    VERT_ATTRIB_MAX = 32
 172 };
 173
 174 /**
 175  * Bitflags for vertex attributes.
 176  * These are used in bitfields in many places.
 177  */
 178 /*@{*/
 179 #define VERT_BIT_POS         (1 << VERT_ATTRIB_POS)
 180 #define VERT_BIT_WEIGHT      (1 << VERT_ATTRIB_WEIGHT)
 181 #define VERT_BIT_NORMAL      (1 << VERT_ATTRIB_NORMAL)
 182 #define VERT_BIT_COLOR0      (1 << VERT_ATTRIB_COLOR0)
 183 #define VERT_BIT_COLOR1      (1 << VERT_ATTRIB_COLOR1)
 184 #define VERT_BIT_FOG         (1 << VERT_ATTRIB_FOG)
 185 #define VERT_BIT_COLOR_INDEX (1 << VERT_ATTRIB_COLOR_INDEX)
 186 #define VERT_BIT_EDGEFLAG    (1 << VERT_ATTRIB_EDGEFLAG)
 187 #define VERT_BIT_TEX0        (1 << VERT_ATTRIB_TEX0)
 188 #define VERT_BIT_TEX1        (1 << VERT_ATTRIB_TEX1)
 189 #define VERT_BIT_TEX2        (1 << VERT_ATTRIB_TEX2)
 190 #define VERT_BIT_TEX3        (1 << VERT_ATTRIB_TEX3)
 191 #define VERT_BIT_TEX4        (1 << VERT_ATTRIB_TEX4)
 192 #define VERT_BIT_TEX5        (1 << VERT_ATTRIB_TEX5)
 193 #define VERT_BIT_TEX6        (1 << VERT_ATTRIB_TEX6)
 194 #define VERT_BIT_TEX7        (1 << VERT_ATTRIB_TEX7)
 195 #define VERT_BIT_GENERIC0    (1 << VERT_ATTRIB_GENERIC0)
 196 #define VERT_BIT_GENERIC1    (1 << VERT_ATTRIB_GENERIC1)
 197 #define VERT_BIT_GENERIC2    (1 << VERT_ATTRIB_GENERIC2)
 198 #define VERT_BIT_GENERIC3    (1 << VERT_ATTRIB_GENERIC3)
 199 #define VERT_BIT_GENERIC4    (1 << VERT_ATTRIB_GENERIC4)
 200 #define VERT_BIT_GENERIC5    (1 << VERT_ATTRIB_GENERIC5)
 201 #define VERT_BIT_GENERIC6    (1 << VERT_ATTRIB_GENERIC6)
 202 #define VERT_BIT_GENERIC7    (1 << VERT_ATTRIB_GENERIC7)
 203 #define VERT_BIT_GENERIC8    (1 << VERT_ATTRIB_GENERIC8)
 204 #define VERT_BIT_GENERIC9    (1 << VERT_ATTRIB_GENERIC9)
 205 #define VERT_BIT_GENERIC10   (1 << VERT_ATTRIB_GENERIC10)
 206 #define VERT_BIT_GENERIC11   (1 << VERT_ATTRIB_GENERIC11)
 207 #define VERT_BIT_GENERIC12   (1 << VERT_ATTRIB_GENERIC12)
 208 #define VERT_BIT_GENERIC13   (1 << VERT_ATTRIB_GENERIC13)
 209 #define VERT_BIT_GENERIC14   (1 << VERT_ATTRIB_GENERIC14)
 210 #define VERT_BIT_GENERIC15   (1 << VERT_ATTRIB_GENERIC15)
 211
 212 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 213 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 214 /*@}*/
 215
 216 /**
 217  * GLSL allows shader writers to allocate vertex result attributes (varyings) in
 218  * single float component granularity. This is in contrast to vertex / fragment
 219  * programs, where result attributes (actually texcoords) were allocated
 220  * in 4-component vectors of floats granularity.
 221  * For performance reasons, it would be optimal to stick with this scheme on a scalar
 222  * processor. Varyings will likely be allocated as 3-component vectors, so statistically
 223  * we win 2 floats.
 224  * The constant VARYINGS_PER_VECTOR tells us how much of float components we pack into
 225  * one result vector. For scalar processor it would be 1, for vector processor - 4.
 226  *
 227  * NOTE: Currently we pack varyings into vertex attributes.
 228  */
 229 #define VARYINGS_PER_VECTOR 2
 230 #define VARYING_EMIT_STYLE  EMIT_2F
 231 #define MAX_VARYING_VECTORS ((MAX_VARYING_FLOATS + VARYINGS_PER_VECTOR - 1) / VARYINGS_PER_VECTOR)
 232
 233 /**
 234  * Indexes for vertex program result attributes
 235  */
 236 /*@{*/
 237 #define VERT_RESULT_HPOS 0
 238 #define VERT_RESULT_COL0 1
 239 #define VERT_RESULT_COL1 2
 240 #define VERT_RESULT_FOGC 3
 241 #define VERT_RESULT_TEX0 4
 242 #define VERT_RESULT_TEX1 5
 243 #define VERT_RESULT_TEX2 6
 244 #define VERT_RESULT_TEX3 7
 245 #define VERT_RESULT_TEX4 8
 246 #define VERT_RESULT_TEX5 9
 247 #define VERT_RESULT_TEX6 10
 248 #define VERT_RESULT_TEX7 11
 249 #define VERT_RESULT_PSIZ 12
 250 #define VERT_RESULT_BFC0 13
 251 #define VERT_RESULT_BFC1 14
 252 #define VERT_RESULT_EDGE 15
 253 #define VERT_RESULT_MAX  16
 254 /*@}*/
 255
 256
 257 /**
 258  * Indexes for fragment program input attributes.
 259  */
 260 enum
 261 {
 262    FRAG_ATTRIB_WPOS = 0,
 263    FRAG_ATTRIB_COL0 = 1,
 264    FRAG_ATTRIB_COL1 = 2,
 265    FRAG_ATTRIB_FOGC = 3,
 266    FRAG_ATTRIB_TEX0 = 4,
 267    FRAG_ATTRIB_TEX1 = 5,
 268    FRAG_ATTRIB_TEX2 = 6,
 269    FRAG_ATTRIB_TEX3 = 7,
 270    FRAG_ATTRIB_TEX4 = 8,
 271    FRAG_ATTRIB_TEX5 = 9,
 272    FRAG_ATTRIB_TEX6 = 10,
 273    FRAG_ATTRIB_TEX7 = 11,
 274    FRAG_ATTRIB_MAX = 12
 275 };
 276
 277 /**
 278  * Bitflags for fragment program input attributes.
 279  */
 280 /*@{*/
 281 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 282 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 283 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 284 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 285 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 286 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 287 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 288 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 289 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 290 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 291 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 292 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 293
 294 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 295                            FRAG_BIT_TEX1|       \
 296                            FRAG_BIT_TEX2|       \
 297                            FRAG_BIT_TEX3|       \
 298                            FRAG_BIT_TEX4|       \
 299                            FRAG_BIT_TEX5|       \
 300                            FRAG_BIT_TEX6|       \
 301                            FRAG_BIT_TEX7)
 302 /*@}*/
 303
 304
 305 /**
 306  * Fragment program results
 307  */
 308 /*@{*/
 309 #define FRAG_RESULT_COLR  0
 310 #define FRAG_RESULT_COLH  1
 311 #define FRAG_RESULT_DEPR  2
 312 #define FRAG_RESULT_MAX   3
 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    GLfloat _Width;              /**< Clamped Line width */
 923 };
 924
 925
 926 /**
 927  * Display list attribute group (GL_LIST_BIT).
 928  */
 929 struct gl_list_attrib
 930 {
 931    GLuint ListBase;
 932 };
 933
 934
 935 /**
 936  * Used by device drivers to hook new commands into display lists.
 937  */
 938 struct gl_list_instruction
 939 {
 940    GLuint Size;
 941    void (*Execute)( GLcontext *ctx, void *data );
 942    void (*Destroy)( GLcontext *ctx, void *data );
 943    void (*Print)( GLcontext *ctx, void *data );
 944 };
 945
 946 #define MAX_DLIST_EXT_OPCODES 16
 947
 948 /**
 949  * Used by device drivers to hook new commands into display lists.
 950  */
 951 struct gl_list_extensions
 952 {
 953    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 954    GLuint NumOpcodes;
 955 };
 956
 957
 958 /**
 959  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 960  */
 961 struct gl_multisample_attrib
 962 {
 963    GLboolean Enabled;
 964    GLboolean SampleAlphaToCoverage;
 965    GLboolean SampleAlphaToOne;
 966    GLboolean SampleCoverage;
 967    GLfloat SampleCoverageValue;
 968    GLboolean SampleCoverageInvert;
 969 };
 970
 971
 972 /**
 973  * A pixelmap (see glPixelMap)
 974  */
 975 struct gl_pixelmap
 976 {
 977    GLint Size;
 978    GLfloat Map[MAX_PIXEL_MAP_TABLE];
 979    GLubyte Map8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 980 };
 981
 982
 983 /**
 984  * Collection of all pixelmaps
 985  */
 986 struct gl_pixelmaps
 987 {
 988    struct gl_pixelmap RtoR;  /**< i.e. GL_PIXEL_MAP_R_TO_R */
 989    struct gl_pixelmap GtoG;
 990    struct gl_pixelmap BtoB;
 991    struct gl_pixelmap AtoA;
 992    struct gl_pixelmap ItoR;
 993    struct gl_pixelmap ItoG;
 994    struct gl_pixelmap ItoB;
 995    struct gl_pixelmap ItoA;
 996    struct gl_pixelmap ItoI;
 997    struct gl_pixelmap StoS;
 998 };
 999
1000
1001 /**
1002  * Pixel attribute group (GL_PIXEL_MODE_BIT).
1003  */
1004 struct gl_pixel_attrib
1005 {
1006    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
1007
1008    /*--- Begin Pixel Transfer State ---*/
1009    /* Fields are in the order in which they're applied... */
1010
1011    /* Scale & Bias (index shift, offset) */
1012    GLfloat RedBias, RedScale;
1013    GLfloat GreenBias, GreenScale;
1014    GLfloat BlueBias, BlueScale;
1015    GLfloat AlphaBias, AlphaScale;
1016    GLfloat DepthBias, DepthScale;
1017    GLint IndexShift, IndexOffset;
1018
1019    /* Pixel Maps */
1020    /* Note: actual pixel maps are not part of this attrib group */
1021    GLboolean MapColorFlag;
1022    GLboolean MapStencilFlag;
1023
1024    /* There are multiple color table stages: */
1025    GLboolean ColorTableEnabled[COLORTABLE_MAX];
1026    GLfloat ColorTableScale[COLORTABLE_MAX][4];  /**< RGBA */
1027    GLfloat ColorTableBias[COLORTABLE_MAX][4];   /**< RGBA */
1028
1029    /* Convolution (GL_EXT_convolution) */
1030    GLboolean Convolution1DEnabled;
1031    GLboolean Convolution2DEnabled;
1032    GLboolean Separable2DEnabled;
1033    GLfloat ConvolutionBorderColor[3][4];
1034    GLenum ConvolutionBorderMode[3];
1035    GLfloat ConvolutionFilterScale[3][4];  /**< RGBA */
1036    GLfloat ConvolutionFilterBias[3][4];   /**< RGBA */
1037    GLfloat PostConvolutionScale[4];  /**< RGBA */
1038    GLfloat PostConvolutionBias[4];   /**< RGBA */
1039
1040    /* Color matrix (GL_SGI_color_matrix) */
1041    /* Note: the color matrix is not part of this attrib group */
1042    GLfloat PostColorMatrixScale[4];  /**< RGBA */
1043    GLfloat PostColorMatrixBias[4];   /**< RGBA */
1044
1045    /* Histogram & minmax (GL_EXT_histogram) */
1046    /* Note: histogram and minmax data are not part of this attrib group */
1047    GLboolean HistogramEnabled;
1048    GLboolean MinMaxEnabled;
1049
1050    /*--- End Pixel Transfer State ---*/
1051
1052    /* Pixel Zoom */
1053    GLfloat ZoomX, ZoomY;
1054
1055    /** GL_SGI_texture_color_table */
1056    GLfloat TextureColorTableScale[4];
1057    GLfloat TextureColorTableBias[4];
1058 };
1059
1060
1061 /**
1062  * Point attribute group (GL_POINT_BIT).
1063  */
1064 struct gl_point_attrib
1065 {
1066    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1067    GLfloat Size;                /**< User-specified point size */
1068    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
1069    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1070    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1071    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1072    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1073    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
1074    GLboolean CoordReplace[MAX_TEXTURE_COORD_UNITS]; /**< GL_ARB_point_sprite */
1075    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1076    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1077 };
1078
1079
1080 /**
1081  * Polygon attribute group (GL_POLYGON_BIT).
1082  */
1083 struct gl_polygon_attrib
1084 {
1085    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1086    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1087    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1088    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1089    GLboolean CullFlag;          /**< Culling on/off flag */
1090    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1091    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1092    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1093    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1094    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1095    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1096    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1097    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1098 };
1099
1100
1101 /**
1102  * Scissor attributes (GL_SCISSOR_BIT).
1103  */
1104 struct gl_scissor_attrib
1105 {
1106    GLboolean Enabled;           /**< Scissor test enabled? */
1107    GLint X, Y;                  /**< Lower left corner of box */
1108    GLsizei Width, Height;       /**< Size of box */
1109 };
1110
1111
1112 /**
1113  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1114  */
1115 struct gl_stencil_attrib
1116 {
1117    GLboolean Enabled;           /**< Enabled flag */
1118    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1119    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1120    GLboolean _TestTwoSide;
1121    GLenum Function[2];          /**< Stencil function */
1122    GLenum FailFunc[2];          /**< Fail function */
1123    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1124    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1125    GLint Ref[2];                /**< Reference value */
1126    GLuint ValueMask[2];         /**< Value mask */
1127    GLuint WriteMask[2];         /**< Write mask */
1128    GLuint Clear;                /**< Clear value */
1129 };
1130
1131
1132 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
1133
1134 /**
1135  * An index for each type of texture object
1136  */
1137 /*@{*/
1138 #define TEXTURE_1D_INDEX    0
1139 #define TEXTURE_2D_INDEX    1
1140 #define TEXTURE_3D_INDEX    2
1141 #define TEXTURE_CUBE_INDEX  3
1142 #define TEXTURE_RECT_INDEX  4
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 /*@}*/
1156
1157
1158 /**
1159  * TexGenEnabled flags.
1160  */
1161 /*@{*/
1162 #define S_BIT 1
1163 #define T_BIT 2
1164 #define R_BIT 4
1165 #define Q_BIT 8
1166 /*@}*/
1167
1168
1169 /**
1170  * Bit flag versions of the corresponding GL_ constants.
1171  */
1172 /*@{*/
1173 #define TEXGEN_SPHERE_MAP        0x1
1174 #define TEXGEN_OBJ_LINEAR        0x2
1175 #define TEXGEN_EYE_LINEAR        0x4
1176 #define TEXGEN_REFLECTION_MAP_NV 0x8
1177 #define TEXGEN_NORMAL_MAP_NV     0x10
1178
1179 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1180                                   TEXGEN_REFLECTION_MAP_NV | \
1181                                   TEXGEN_NORMAL_MAP_NV)
1182 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1183                                   TEXGEN_REFLECTION_MAP_NV | \
1184                                   TEXGEN_NORMAL_MAP_NV     | \
1185                                   TEXGEN_EYE_LINEAR)
1186 /*@}*/
1187
1188
1189 /* A selection of state flags to make driver and module's lives easier. */
1190 #define ENABLE_TEXGEN0        0x1
1191 #define ENABLE_TEXGEN1        0x2
1192 #define ENABLE_TEXGEN2        0x4
1193 #define ENABLE_TEXGEN3        0x8
1194 #define ENABLE_TEXGEN4        0x10
1195 #define ENABLE_TEXGEN5        0x20
1196 #define ENABLE_TEXGEN6        0x40
1197 #define ENABLE_TEXGEN7        0x80
1198
1199 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1200 #define ENABLE_TEXMAT1        0x2
1201 #define ENABLE_TEXMAT2        0x4
1202 #define ENABLE_TEXMAT3        0x8
1203 #define ENABLE_TEXMAT4        0x10
1204 #define ENABLE_TEXMAT5        0x20
1205 #define ENABLE_TEXMAT6        0x40
1206 #define ENABLE_TEXMAT7        0x80
1207
1208 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1209 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1210
1211
1212 /**
1213  * Texel fetch function prototype.  We use texel fetch functions to
1214  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1215  * texture images.  These functions help to isolate us from the gritty
1216  * details of all the various texture image encodings.
1217  *
1218  * \param texImage texture image.
1219  * \param col texel column.
1220  * \param row texel row.
1221  * \param img texel image level/layer.
1222  * \param texelOut output texel (up to 4 GLchans)
1223  */
1224 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1225                                  GLint col, GLint row, GLint img,
1226                                  GLchan *texelOut );
1227
1228 /**
1229  * As above, but returns floats.
1230  * Used for depth component images and for upcoming signed/float
1231  * texture images.
1232  */
1233 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1234                                  GLint col, GLint row, GLint img,
1235                                  GLfloat *texelOut );
1236
1237
1238 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1239                                GLint col, GLint row, GLint img,
1240                                const void *texel);
1241
1242
1243 /**
1244  * This macro defines the (many) parameters to the texstore functions.
1245  * \param dims  either 1 or 2 or 3
1246  * \param baseInternalFormat  user-specified base internal format
1247  * \param dstFormat  destination Mesa texture format
1248  * \param dstAddr  destination image address
1249  * \param dstX/Y/Zoffset  destination x/y/z offset (ala TexSubImage), in texels
1250  * \param dstRowStride  destination image row stride, in bytes
1251  * \param dstImageOffsets  offset of each 2D slice within 3D texture, in texels
1252  * \param srcWidth/Height/Depth  source image size, in pixels
1253  * \param srcFormat  incoming image format
1254  * \param srcType  incoming image data type
1255  * \param srcAddr  source image address
1256  * \param srcPacking  source image packing parameters
1257  */
1258 #define TEXSTORE_PARAMS \
1259         GLcontext *ctx, GLuint dims, \
1260         GLenum baseInternalFormat, \
1261         const struct gl_texture_format *dstFormat, \
1262         GLvoid *dstAddr, \
1263         GLint dstXoffset, GLint dstYoffset, GLint dstZoffset, \
1264         GLint dstRowStride, const GLuint *dstImageOffsets, \
1265         GLint srcWidth, GLint srcHeight, GLint srcDepth, \
1266         GLenum srcFormat, GLenum srcType, \
1267         const GLvoid *srcAddr, \
1268         const struct gl_pixelstore_attrib *srcPacking
1269
1270
1271
1272 /**
1273  * Texture image storage function.
1274  */
1275 typedef GLboolean (*StoreTexImageFunc)(TEXSTORE_PARAMS);
1276
1277
1278 /**
1279  * Texture format record
1280  */
1281 struct gl_texture_format
1282 {
1283    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1284
1285    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1286                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1287                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1288                                  *   GL_DEPTH_COMPONENT.
1289                                  */
1290    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1291    GLubyte RedBits;             /**< Bits per texel component */
1292    GLubyte GreenBits;           /**< These are just rough approximations for */
1293    GLubyte BlueBits;            /**< compressed texture formats. */
1294    GLubyte AlphaBits;
1295    GLubyte LuminanceBits;
1296    GLubyte IntensityBits;
1297    GLubyte IndexBits;
1298    GLubyte DepthBits;
1299    GLubyte StencilBits;         /**< GL_EXT_packed_depth_stencil */
1300
1301    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1302
1303    StoreTexImageFunc StoreImage;
1304
1305    /**
1306     * \name Texel fetch function pointers
1307     */
1308    /*@{*/
1309    FetchTexelFuncC FetchTexel1D;
1310    FetchTexelFuncC FetchTexel2D;
1311    FetchTexelFuncC FetchTexel3D;
1312    FetchTexelFuncF FetchTexel1Df;
1313    FetchTexelFuncF FetchTexel2Df;
1314    FetchTexelFuncF FetchTexel3Df;
1315    /*@}*/
1316
1317    StoreTexelFunc StoreTexel;
1318 };
1319
1320
1321 #define MAX_3D_TEXTURE_SIZE (1 << (MAX_3D_TEXTURE_LEVELS - 1))
1322
1323 /**
1324  * Texture image state.  Describes the dimensions of a texture image,
1325  * the texel format and pointers to Texel Fetch functions.
1326  */
1327 struct gl_texture_image
1328 {
1329    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1330                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1331                                  *   GL_INTENSITY, GL_COLOR_INDEX,
1332                                  *   GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT
1333                                  *   only. Used for choosing TexEnv arithmetic.
1334                                  */
1335    GLint InternalFormat;        /**< Internal format as given by the user */
1336    GLuint Border;               /**< 0 or 1 */
1337    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1338    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1339    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1340    GLuint Width2;               /**< = Width - 2*Border */
1341    GLuint Height2;              /**< = Height - 2*Border */
1342    GLuint Depth2;               /**< = Depth - 2*Border */
1343    GLuint WidthLog2;            /**< = log2(Width2) */
1344    GLuint HeightLog2;           /**< = log2(Height2) */
1345    GLuint DepthLog2;            /**< = log2(Depth2) */
1346    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1347    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1348    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1349    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1350    GLboolean IsClientData;      /**< Data owned by client? */
1351    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1352
1353    const struct gl_texture_format *TexFormat;
1354
1355    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1356
1357    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1358    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1359
1360    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1361    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1362
1363    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1364    GLuint *ImageOffsets;        /**< if 3D texture: array [Depth] of offsets to
1365                                      each 2D slice in 'Data', in texels */
1366    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1367
1368    /**
1369     * \name For device driver:
1370     */
1371    /*@{*/
1372    void *DriverData;            /**< Arbitrary device driver data */
1373    /*@}*/
1374 };
1375
1376
1377 /**
1378  * Indexes for cube map faces.
1379  */
1380 /*@{*/
1381 #define FACE_POS_X   0
1382 #define FACE_NEG_X   1
1383 #define FACE_POS_Y   2
1384 #define FACE_NEG_Y   3
1385 #define FACE_POS_Z   4
1386 #define FACE_NEG_Z   5
1387 #define MAX_FACES  6
1388 /*@}*/
1389
1390
1391 /**
1392  * Texture object state.  Contains the array of mipmap images, border color,
1393  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1394  * color palette.
1395  */
1396 struct gl_texture_object
1397 {
1398    _glthread_Mutex Mutex;       /**< for thread safety */
1399    GLint RefCount;              /**< reference count */
1400    GLuint Name;                 /**< the user-visible texture object ID */
1401    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1402    GLfloat Priority;            /**< in [0,1] */
1403    GLfloat BorderColor[4];      /**< unclamped */
1404    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1405    GLenum WrapS;                /**< S-axis texture image wrap mode */
1406    GLenum WrapT;                /**< T-axis texture image wrap mode */
1407    GLenum WrapR;                /**< R-axis texture image wrap mode */
1408    GLenum MinFilter;            /**< minification filter */
1409    GLenum MagFilter;            /**< magnification filter */
1410    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1411    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1412    GLfloat LodBias;             /**< OpenGL 1.4 */
1413    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1414    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1415    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1416    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1417    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1418    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1419    GLenum CompareMode;          /**< GL_ARB_shadow */
1420    GLenum CompareFunc;          /**< GL_ARB_shadow */
1421    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1422    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1423    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1424    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1425    GLboolean Complete;          /**< Is texture object complete? */
1426
1427    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1428    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1429
1430    /** GL_EXT_paletted_texture */
1431    struct gl_color_table Palette;
1432
1433
1434    /**
1435     * \name For device driver.
1436     * Note: instead of attaching driver data to this pointer, it's preferable
1437     * to instead use this struct as a base class for your own texture object
1438     * class.  Driver->NewTextureObject() can be used to implement the
1439     * allocation.
1440     */
1441    void *DriverData;    /**< Arbitrary device driver data */
1442 };
1443
1444
1445 /**
1446  * Texture combine environment state.
1447  *
1448  * \todo
1449  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1450  * structure will need to be expanded for 4 elements.
1451  */
1452 struct gl_tex_env_combine_state
1453 {
1454    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1455    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1456    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1457    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1458    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1459    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1460    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1461    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1462    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1463    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1464 };
1465
1466
1467 /**
1468  * Texture unit state.  Contains enable flags, texture environment/function/
1469  * combiners, texgen state, pointers to current texture objects and
1470  * post-filter color tables.
1471  */
1472 struct gl_texture_unit
1473 {
1474    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1475    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1476
1477    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1478    GLfloat EnvColor[4];
1479    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1480    /** \name Tex coord generation mode
1481     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1482    /*@{*/
1483    GLenum GenModeS;
1484    GLenum GenModeT;
1485    GLenum GenModeR;
1486    GLenum GenModeQ;
1487    /*@}*/
1488    GLbitfield _GenBitS;
1489    GLbitfield _GenBitT;
1490    GLbitfield _GenBitR;
1491    GLbitfield _GenBitQ;
1492    GLbitfield _GenFlags;        /**< bitwise or of GenBit[STRQ] */
1493    GLfloat ObjectPlaneS[4];
1494    GLfloat ObjectPlaneT[4];
1495    GLfloat ObjectPlaneR[4];
1496    GLfloat ObjectPlaneQ[4];
1497    GLfloat EyePlaneS[4];
1498    GLfloat EyePlaneT[4];
1499    GLfloat EyePlaneR[4];
1500    GLfloat EyePlaneQ[4];
1501    GLfloat LodBias;             /**< for biasing mipmap levels */
1502
1503    /**
1504     * \name GL_EXT_texture_env_combine
1505     */
1506    struct gl_tex_env_combine_state Combine;
1507
1508    /**
1509     * Derived state based on \c EnvMode and the \c BaseFormat of the
1510     * currently enabled texture.
1511     */
1512    struct gl_tex_env_combine_state _EnvMode;
1513
1514    /**
1515     * Currently enabled combiner state.  This will point to either
1516     * \c Combine or \c _EnvMode.
1517     */
1518    struct gl_tex_env_combine_state *_CurrentCombine;
1519
1520    struct gl_texture_object *Current1D;
1521    struct gl_texture_object *Current2D;
1522    struct gl_texture_object *Current3D;
1523    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1524    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1525
1526    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1527
1528    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1529    struct gl_texture_object Saved2D;
1530    struct gl_texture_object Saved3D;
1531    struct gl_texture_object SavedCubeMap;
1532    struct gl_texture_object SavedRect;
1533
1534    /* GL_SGI_texture_color_table */
1535    struct gl_color_table ColorTable;
1536    struct gl_color_table ProxyColorTable;
1537    GLboolean ColorTableEnabled;
1538 };
1539
1540 struct texenvprog_cache_item {
1541    GLuint hash;
1542    void *key;
1543    struct gl_fragment_program *data;
1544    struct texenvprog_cache_item *next;
1545 };
1546
1547 struct texenvprog_cache {
1548    struct texenvprog_cache_item **items;
1549    GLuint size, n_items;
1550    GLcontext *ctx;
1551 };
1552
1553 /**
1554  * Texture attribute group (GL_TEXTURE_BIT).
1555  */
1556 struct gl_texture_attrib
1557 {
1558    /**
1559     * name multitexture
1560     */
1561    /**@{*/
1562    GLuint CurrentUnit;         /**< Active texture unit */
1563    GLbitfield _EnabledUnits;  /**< one bit set for each really-enabled unit */
1564    GLbitfield _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1565    GLbitfield _GenFlags;            /**< for texgen */
1566    GLbitfield _TexGenEnabled;
1567    GLbitfield _TexMatEnabled;
1568    /**@}*/
1569
1570    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1571
1572    struct gl_texture_object *Proxy1D;
1573    struct gl_texture_object *Proxy2D;
1574    struct gl_texture_object *Proxy3D;
1575    struct gl_texture_object *ProxyCubeMap;
1576    struct gl_texture_object *ProxyRect;
1577
1578    /** GL_EXT_shared_texture_palette */
1579    GLboolean SharedPalette;
1580    struct gl_color_table Palette;
1581
1582    /** Cached texenv fragment programs */
1583    struct texenvprog_cache env_fp_cache;
1584 };
1585
1586
1587 /**
1588  * Transformation attribute group (GL_TRANSFORM_BIT).
1589  */
1590 struct gl_transform_attrib
1591 {
1592    GLenum MatrixMode;                           /**< Matrix mode */
1593    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1594    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1595    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1596    GLboolean Normalize;                         /**< Normalize all normals? */
1597    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1598    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1599
1600    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1601    GLfloat CullEyePos[4];
1602    GLfloat CullObjPos[4];
1603 };
1604
1605
1606 /**
1607  * Viewport attribute group (GL_VIEWPORT_BIT).
1608  */
1609 struct gl_viewport_attrib
1610 {
1611    GLint X, Y;                  /**< position */
1612    GLsizei Width, Height;       /**< size */
1613    GLfloat Near, Far;           /**< Depth buffer range */
1614    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1615 };
1616
1617
1618 /**
1619  * Node for the attribute stack.
1620  */
1621 struct gl_attrib_node
1622 {
1623    GLbitfield kind;
1624    void *data;
1625    struct gl_attrib_node *next;
1626 };
1627
1628
1629 /**
1630  * GL_ARB_vertex/pixel_buffer_object buffer object
1631  */
1632 struct gl_buffer_object
1633 {
1634    GLint RefCount;
1635    GLuint Name;
1636    GLenum Usage;
1637    GLenum Access;
1638    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1639    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1640    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1641    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1642 };
1643
1644
1645
1646 /**
1647  * Client pixel packing/unpacking attributes
1648  */
1649 struct gl_pixelstore_attrib
1650 {
1651    GLint Alignment;
1652    GLint RowLength;
1653    GLint SkipPixels;
1654    GLint SkipRows;
1655    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1656    GLint SkipImages;      /**< for GL_EXT_texture3D */
1657    GLboolean SwapBytes;
1658    GLboolean LsbFirst;
1659    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1660    GLboolean Invert;        /**< GL_MESA_pack_invert */
1661    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1662 };
1663
1664
1665
1666 /**
1667  * Client vertex array attributes
1668  */
1669 struct gl_client_array
1670 {
1671    GLint Size;                  /**< components per element (1,2,3,4) */
1672    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1673    GLsizei Stride;              /**< user-specified stride */
1674    GLsizei StrideB;             /**< actual stride in bytes */
1675    const GLubyte *Ptr;          /**< Points to array data */
1676    GLboolean Enabled;           /**< Enabled flag is a boolean */
1677    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1678
1679    /**< GL_ARB_vertex_buffer_object */
1680    struct gl_buffer_object *BufferObj;
1681    GLuint _MaxElement;
1682 };
1683
1684
1685 /**
1686  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1687  * extension, but a nice encapsulation in any case.
1688  */
1689 struct gl_array_object
1690 {
1691    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1692    GLuint Name;
1693
1694    /** Conventional vertex arrays */
1695    /*@{*/
1696    struct gl_client_array Vertex;
1697    struct gl_client_array Normal;
1698    struct gl_client_array Color;
1699    struct gl_client_array SecondaryColor;
1700    struct gl_client_array FogCoord;
1701    struct gl_client_array Index;
1702    struct gl_client_array EdgeFlag;
1703    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1704    /*@}*/
1705
1706    /** Generic arrays for vertex programs/shaders */
1707    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1708
1709    /** Mask of _NEW_ARRAY_* values indicating which arrays are enabled */
1710    GLbitfield _Enabled;
1711 };
1712
1713
1714 /**
1715  * Vertex array state
1716  */
1717 struct gl_array_attrib
1718 {
1719    struct gl_array_object *ArrayObj;
1720    struct gl_array_object *DefaultArrayObj;
1721
1722    GLint ActiveTexture;         /**< Client Active Texture */
1723    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1724    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1725
1726    GLbitfield NewState;         /**< mask of _NEW_ARRAY_* values */
1727
1728 #if FEATURE_ARB_vertex_buffer_object
1729    struct gl_buffer_object *NullBufferObj;
1730    struct gl_buffer_object *ArrayBufferObj;
1731    struct gl_buffer_object *ElementArrayBufferObj;
1732 #endif
1733    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1734 };
1735
1736
1737 /**
1738  * Feedback buffer state
1739  */
1740 struct gl_feedback
1741 {
1742    GLenum Type;
1743    GLbitfield _Mask;            /* FB_* bits */
1744    GLfloat *Buffer;
1745    GLuint BufferSize;
1746    GLuint Count;
1747 };
1748
1749
1750 /**
1751  * Selection buffer state
1752  */
1753 struct gl_selection
1754 {
1755    GLuint *Buffer;      /**< selection buffer */
1756    GLuint BufferSize;   /**< size of the selection buffer */
1757    GLuint BufferCount;  /**< number of values in the selection buffer */
1758    GLuint Hits;         /**< number of records in the selection buffer */
1759    GLuint NameStackDepth; /**< name stack depth */
1760    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1761    GLboolean HitFlag;   /**< hit flag */
1762    GLfloat HitMinZ;     /**< minimum hit depth */
1763    GLfloat HitMaxZ;     /**< maximum hit depth */
1764 };
1765
1766
1767 /**
1768  * 1-D Evaluator control points
1769  */
1770 struct gl_1d_map
1771 {
1772    GLuint Order;        /**< Number of control points */
1773    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1774    GLfloat *Points;     /**< Points to contiguous control points */
1775 };
1776
1777
1778 /**
1779  * 2-D Evaluator control points
1780  */
1781 struct gl_2d_map
1782 {
1783    GLuint Uorder;               /**< Number of control points in U dimension */
1784    GLuint Vorder;               /**< Number of control points in V dimension */
1785    GLfloat u1, u2, du;
1786    GLfloat v1, v2, dv;
1787    GLfloat *Points;             /**< Points to contiguous control points */
1788 };
1789
1790
1791 /**
1792  * All evaluator control point state
1793  */
1794 struct gl_evaluators
1795 {
1796    /**
1797     * \name 1-D maps
1798     */
1799    /*@{*/
1800    struct gl_1d_map Map1Vertex3;
1801    struct gl_1d_map Map1Vertex4;
1802    struct gl_1d_map Map1Index;
1803    struct gl_1d_map Map1Color4;
1804    struct gl_1d_map Map1Normal;
1805    struct gl_1d_map Map1Texture1;
1806    struct gl_1d_map Map1Texture2;
1807    struct gl_1d_map Map1Texture3;
1808    struct gl_1d_map Map1Texture4;
1809    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1810    /*@}*/
1811
1812    /**
1813     * \name 2-D maps
1814     */
1815    /*@{*/
1816    struct gl_2d_map Map2Vertex3;
1817    struct gl_2d_map Map2Vertex4;
1818    struct gl_2d_map Map2Index;
1819    struct gl_2d_map Map2Color4;
1820    struct gl_2d_map Map2Normal;
1821    struct gl_2d_map Map2Texture1;
1822    struct gl_2d_map Map2Texture2;
1823    struct gl_2d_map Map2Texture3;
1824    struct gl_2d_map Map2Texture4;
1825    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1826    /*@}*/
1827 };
1828
1829
1830 /**
1831  * Names of the various vertex/fragment program register files, etc.
1832  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1833  * All values should fit in a 4-bit field.
1834  */
1835 enum register_file
1836 {
1837    PROGRAM_TEMPORARY = 0,
1838    PROGRAM_LOCAL_PARAM = 1,
1839    PROGRAM_ENV_PARAM = 2,
1840    PROGRAM_STATE_VAR = 3,
1841    PROGRAM_INPUT = 4,
1842    PROGRAM_OUTPUT = 5,
1843    PROGRAM_NAMED_PARAM = 6,
1844    PROGRAM_CONSTANT = 7,
1845    PROGRAM_WRITE_ONLY = 8,
1846    PROGRAM_ADDRESS = 9,
1847    PROGRAM_UNDEFINED = 10,  /* invalid value */
1848    PROGRAM_FILE_MAX
1849 };
1850
1851
1852 /** Vertex and fragment instructions */
1853 struct prog_instruction;
1854 struct gl_program_parameter_list;
1855
1856
1857 /**
1858  * Base class for any kind of program object
1859  */
1860 struct gl_program
1861 {
1862    GLuint Id;
1863    GLubyte *String;          /**< Null-terminated program text */
1864    GLint RefCount;
1865    GLenum Target;
1866    GLenum Format;            /**< String encoding format */
1867    GLboolean Resident;
1868
1869    struct prog_instruction *Instructions;
1870
1871    GLbitfield InputsRead;     /* Bitmask of which input regs are read */
1872    GLbitfield OutputsWritten; /* Bitmask of which output regs are written to */
1873
1874    /** Named parameters, constants, etc. from program text */
1875    struct gl_program_parameter_list *Parameters;
1876    /** Numbered local parameters */
1877    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1878
1879    /** Logical counts */
1880    /*@{*/
1881    GLuint NumInstructions;
1882    GLuint NumTemporaries;
1883    GLuint NumParameters;
1884    GLuint NumAttributes;
1885    GLuint NumAddressRegs;
1886    /*@}*/
1887    /** Native, actual h/w counts */
1888    /*@{*/
1889    GLuint NumNativeInstructions;
1890    GLuint NumNativeTemporaries;
1891    GLuint NumNativeParameters;
1892    GLuint NumNativeAttributes;
1893    GLuint NumNativeAddressRegs;
1894    /*@}*/
1895 };
1896
1897
1898 /** Vertex program object */
1899 struct gl_vertex_program
1900 {
1901    struct gl_program Base;   /**< base class */
1902    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1903    GLboolean IsPositionInvariant;
1904    void *TnlData;               /**< should probably use Base.DriverData */
1905 };
1906
1907
1908 /** Fragment program object */
1909 struct gl_fragment_program
1910 {
1911    struct gl_program Base;   /**< base class */
1912    GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1913    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1914    GLuint NumTexInstructions;
1915    GLuint NumTexIndirections;
1916    GLuint NumNativeAluInstructions; /**< GL_ARB_fragment_program */
1917    GLuint NumNativeTexInstructions;
1918    GLuint NumNativeTexIndirections;
1919    GLenum FogOption;
1920    GLboolean UsesKill;
1921 };
1922
1923
1924 /**
1925  * State common to vertex and fragment programs.
1926  */
1927 struct gl_program_state
1928 {
1929    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1930    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1931 };
1932
1933
1934 /**
1935  * Context state for vertex programs.
1936  */
1937 struct gl_vertex_program_state
1938 {
1939    GLboolean Enabled;               /**< GL_VERTEX_PROGRAM_ARB/NV */
1940    GLboolean _Enabled;              /**< Enabled and valid program? */
1941    GLboolean PointSizeEnabled;      /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1942    GLboolean TwoSideEnabled;        /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1943    struct gl_vertex_program *Current;  /**< ptr to currently bound program */
1944    const struct gl_vertex_program *_Current;    /**< ptr to currently bound
1945                                                   program, including internal
1946                                                   (t_vp_build.c) programs */
1947
1948    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /**< Env params */
1949
1950    /* For GL_NV_vertex_program only: */
1951    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1952    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1953
1954 #if FEATURE_MESA_program_debug
1955    GLprogramcallbackMESA Callback;
1956    GLvoid *CallbackData;
1957    GLboolean CallbackEnabled;
1958    GLuint CurrentPosition;
1959 #endif
1960 };
1961
1962
1963 /**
1964  * Context state for fragment programs.
1965  */
1966 struct gl_fragment_program_state
1967 {
1968    GLboolean Enabled;     /**< User-set fragment program enable flag */
1969    GLboolean _Enabled;    /**< Fragment program enabled and valid? */
1970    GLboolean _Active;     /**< Is a user program or internal program active? */
1971    struct gl_fragment_program *Current;  /**< User-bound program */
1972    const struct gl_fragment_program *_Current; /**< currently active program
1973                                                (including internal programs) */
1974    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /**< Env params */
1975
1976 #if FEATURE_MESA_program_debug
1977    GLprogramcallbackMESA Callback;
1978    GLvoid *CallbackData;
1979    GLboolean CallbackEnabled;
1980    GLuint CurrentPosition;
1981 #endif
1982 };
1983
1984
1985 /**
1986  * ATI_fragment_shader runtime state
1987  */
1988 #define ATI_FS_INPUT_PRIMARY 0
1989 #define ATI_FS_INPUT_SECONDARY 1
1990
1991 struct atifs_instruction;
1992 struct atifs_setupinst;
1993
1994 /**
1995  * ATI fragment shader
1996  */
1997 struct ati_fragment_shader
1998 {
1999    GLuint Id;
2000    GLint RefCount;
2001    struct atifs_instruction *Instructions[2];
2002    struct atifs_setupinst *SetupInst[2];
2003    GLfloat Constants[8][4];
2004    GLbitfield LocalConstDef;  /** Indicates which constants have been set */
2005    GLubyte numArithInstr[2];
2006    GLubyte regsAssigned[2];
2007    GLubyte NumPasses;         /** 1 or 2 */
2008    GLubyte cur_pass;
2009    GLubyte last_optype;
2010    GLboolean interpinp1;
2011    GLboolean isValid;
2012    GLuint swizzlerq;
2013 };
2014
2015 /**
2016  * Context state for GL_ATI_fragment_shader
2017  */
2018 struct gl_ati_fragment_shader_state
2019 {
2020    GLboolean Enabled;
2021    GLboolean _Enabled;                      /** enabled and valid shader? */
2022    GLboolean Compiling;
2023    GLfloat GlobalConstants[8][4];
2024    struct ati_fragment_shader *Current;
2025 };
2026
2027
2028 /**
2029  * Occlusion/timer query object.
2030  */
2031 struct gl_query_object
2032 {
2033    GLuint Id;
2034    GLuint64EXT Result; /* the counter */
2035    GLboolean Active;   /* inside Begin/EndQuery */
2036    GLboolean Ready;    /* result is ready */
2037 };
2038
2039
2040 /**
2041  * Context state for query objects.
2042  */
2043 struct gl_query_state
2044 {
2045    struct _mesa_HashTable *QueryObjects;
2046    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2047    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2048 };
2049
2050
2051 /**
2052  * Context state for vertex/fragment shaders.
2053  */
2054 struct gl_shader_objects_state
2055 {
2056    struct gl2_program_intf **CurrentProgram;
2057    GLboolean _VertexShaderPresent;
2058    GLboolean _FragmentShaderPresent;
2059 };
2060
2061
2062 /**
2063  * State which can be shared by multiple contexts:
2064  */
2065 struct gl_shared_state
2066 {
2067    _glthread_Mutex Mutex;                  /**< for thread safety */
2068    GLint RefCount;                         /**< Reference count */
2069    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2070    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2071
2072    /**
2073     * \name Default texture objects (shared by all multi-texture units)
2074     */
2075    /*@{*/
2076    struct gl_texture_object *Default1D;
2077    struct gl_texture_object *Default2D;
2078    struct gl_texture_object *Default3D;
2079    struct gl_texture_object *DefaultCubeMap;
2080    struct gl_texture_object *DefaultRect;
2081    /*@}*/
2082
2083    /**
2084     * \name Thread safety and statechange notification for texture
2085     * objects.
2086     *
2087     * \todo Improve the granularity of locking.
2088     */
2089    /*@{*/
2090    _glthread_Mutex TexMutex;               /**< texobj thread safety */
2091    GLuint TextureStateStamp;               /**< state notification for shared tex  */
2092    /*@}*/
2093
2094
2095
2096    /**
2097     * \name Vertex/fragment programs
2098     */
2099    /*@{*/
2100    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2101 #if FEATURE_ARB_vertex_program
2102    struct gl_program *DefaultVertexProgram;
2103 #endif
2104 #if FEATURE_ARB_fragment_program
2105    struct gl_program *DefaultFragmentProgram;
2106 #endif
2107    /*@}*/
2108
2109 #if FEATURE_ATI_fragment_shader
2110    struct _mesa_HashTable *ATIShaders;
2111    struct ati_fragment_shader *DefaultFragmentShader;
2112 #endif
2113
2114 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2115    struct _mesa_HashTable *BufferObjects;
2116 #endif
2117
2118 #if FEATURE_ARB_shader_objects
2119    struct _mesa_HashTable *GL2Objects;
2120 #endif
2121
2122 #if FEATURE_EXT_framebuffer_object
2123    struct _mesa_HashTable *RenderBuffers;
2124    struct _mesa_HashTable *FrameBuffers;
2125 #endif
2126
2127    /** Objects associated with the GL_APPLE_vertex_array_object extension. */
2128    struct _mesa_HashTable *ArrayObjects;
2129
2130    void *DriverData;  /**< Device driver shared state */
2131 };
2132
2133
2134
2135
2136 /**
2137  * A renderbuffer stores colors or depth values or stencil values.
2138  * A framebuffer object will have a collection of these.
2139  * Data are read/written to the buffer with a handful of Get/Put functions.
2140  *
2141  * Instances of this object are allocated with the Driver's NewRenderbuffer
2142  * hook.  Drivers will likely wrap this class inside a driver-specific
2143  * class to simulate inheritance.
2144  */
2145 struct gl_renderbuffer
2146 {
2147    _glthread_Mutex Mutex;                  /**< for thread safety */
2148    GLuint ClassID;        /**< Useful for drivers */
2149    GLuint Name;
2150    GLint RefCount;
2151    GLuint Width, Height;
2152    GLenum InternalFormat; /**< The user-specified format */
2153    GLenum _ActualFormat;  /**< The driver-chosen format */
2154    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2155                                GL_STENCIL_INDEX. */
2156    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2157    GLubyte RedBits;      /**< Bits of red per pixel */
2158    GLubyte GreenBits;
2159    GLubyte BlueBits;
2160    GLubyte AlphaBits;
2161    GLubyte IndexBits;
2162    GLubyte DepthBits;
2163    GLubyte StencilBits;
2164    GLvoid *Data;        /**< This may not be used by some kinds of RBs */
2165
2166    /* Used to wrap one renderbuffer around another: */
2167    struct gl_renderbuffer *Wrapped;
2168
2169    /* Delete this renderbuffer */
2170    void (*Delete)(struct gl_renderbuffer *rb);
2171
2172    /* Allocate new storage for this renderbuffer */
2173    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2174                              GLenum internalFormat,
2175                              GLuint width, GLuint height);
2176
2177    /* Lock/Unlock are called before/after calling the Get/Put functions.
2178     * Not sure this is the right place for these yet.
2179    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2180    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2181     */
2182
2183    /* Return a pointer to the element/pixel at (x,y).
2184     * Should return NULL if the buffer memory can't be directly addressed.
2185     */
2186    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2187                        GLint x, GLint y);
2188
2189    /* Get/Read a row of values.
2190     * The values will be of format _BaseFormat and type DataType.
2191     */
2192    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2193                   GLint x, GLint y, void *values);
2194
2195    /* Get/Read values at arbitrary locations.
2196     * The values will be of format _BaseFormat and type DataType.
2197     */
2198    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2199                      const GLint x[], const GLint y[], void *values);
2200
2201    /* Put/Write a row of values.
2202     * The values will be of format _BaseFormat and type DataType.
2203     */
2204    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2205                   GLint x, GLint y, const void *values, const GLubyte *mask);
2206
2207    /* Put/Write a row of RGB values.  This is a special-case routine that's
2208     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2209     * a common case for glDrawPixels and some triangle routines.
2210     * The values will be of format GL_RGB and type DataType.
2211     */
2212    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2213                     GLint x, GLint y, const void *values, const GLubyte *mask);
2214
2215
2216    /* Put/Write a row of identical values.
2217     * The values will be of format _BaseFormat and type DataType.
2218     */
2219    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2220                      GLint x, GLint y, const void *value, const GLubyte *mask);
2221
2222    /* Put/Write values at arbitrary locations.
2223     * The values will be of format _BaseFormat and type DataType.
2224     */
2225    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2226                      const GLint x[], const GLint y[], const void *values,
2227                      const GLubyte *mask);
2228    /* Put/Write identical values at arbitrary locations.
2229     * The values will be of format _BaseFormat and type DataType.
2230     */
2231    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2232                          GLuint count, const GLint x[], const GLint y[],
2233                          const void *value, const GLubyte *mask);
2234 };
2235
2236
2237 /**
2238  * A renderbuffer attachment point points to either a texture object
2239  * (and specifies a mipmap level, cube face or 3D texture slice) or
2240  * points to a renderbuffer.
2241  */
2242 struct gl_renderbuffer_attachment
2243 {
2244    GLenum Type;  /* GL_NONE or GL_TEXTURE or GL_RENDERBUFFER_EXT */
2245    GLboolean Complete;
2246
2247    /* IF Type == GL_RENDERBUFFER_EXT: */
2248    struct gl_renderbuffer *Renderbuffer;
2249
2250    /* IF Type == GL_TEXTURE: */
2251    struct gl_texture_object *Texture;
2252    GLuint TextureLevel;
2253    GLuint CubeMapFace;  /* 0 .. 5, for cube map textures */
2254    GLuint Zoffset;      /* for 3D textures */
2255 };
2256
2257
2258 /**
2259  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2260  * In C++ terms, think of this as a base class from which device drivers
2261  * will make derived classes.
2262  */
2263 struct gl_framebuffer
2264 {
2265    _glthread_Mutex Mutex;                  /**< for thread safety */
2266    GLuint Name;      /* if zero, this is a window system framebuffer */
2267    GLint RefCount;
2268    GLboolean DeletePending;
2269
2270    GLvisual Visual;     /**< The framebuffer's visual.
2271                              Immutable if this is a window system buffer.
2272                              Computed from attachments if user-made FBO. */
2273
2274    GLboolean Initialized;
2275
2276    GLuint Width, Height;        /**< size of frame buffer in pixels */
2277
2278    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2279    /*@{*/
2280    GLint _Xmin, _Xmax;  /**< inclusive */
2281    GLint _Ymin, _Ymax;  /**< exclusive */
2282    /*@}*/
2283
2284    /** \name  Derived Z buffer stuff */
2285    /*@{*/
2286    GLuint _DepthMax;    /**< Max depth buffer value */
2287    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2288    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2289    /*@}*/
2290
2291    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2292
2293    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2294    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2295
2296    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2297     * attribute group and GL_PIXEL attribute group, respectively.
2298     */
2299    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2300    GLenum ColorReadBuffer;
2301
2302    /* These are computed from ColorDrawBuffer and ColorReadBuffer */
2303    GLbitfield _ColorDrawBufferMask[MAX_DRAW_BUFFERS]; /* Mask of BUFFER_BIT_* flags */
2304    GLint _ColorReadBufferIndex; /* -1 = None */
2305
2306    /* These are computed from _ColorDrawBufferMask and _ColorReadBufferIndex */
2307    GLuint _NumColorDrawBuffers[MAX_DRAW_BUFFERS];
2308    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS][4];
2309    struct gl_renderbuffer *_ColorReadBuffer;
2310
2311    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2312     * depth/stencil buffers attached above. */
2313    struct gl_renderbuffer *_DepthBuffer;
2314    struct gl_renderbuffer *_StencilBuffer;
2315
2316    /** Delete this framebuffer */
2317    void (*Delete)(struct gl_framebuffer *fb);
2318 };
2319
2320
2321 /**
2322  * Limits for vertex and fragment programs.
2323  */
2324 struct gl_program_constants
2325 {
2326    /* logical limits */
2327    GLuint MaxInstructions;
2328    GLuint MaxAluInstructions; /* fragment programs only, for now */
2329    GLuint MaxTexInstructions; /* fragment programs only, for now */
2330    GLuint MaxTexIndirections; /* fragment programs only, for now */
2331    GLuint MaxAttribs;
2332    GLuint MaxTemps;
2333    GLuint MaxAddressRegs; /* vertex program only, for now */
2334    GLuint MaxParameters;
2335    GLuint MaxLocalParams;
2336    GLuint MaxEnvParams;
2337    /* native/hardware limits */
2338    GLuint MaxNativeInstructions;
2339    GLuint MaxNativeAluInstructions; /* fragment programs only, for now */
2340    GLuint MaxNativeTexInstructions; /* fragment programs only, for now */
2341    GLuint MaxNativeTexIndirections; /* fragment programs only, for now */
2342    GLuint MaxNativeAttribs;
2343    GLuint MaxNativeTemps;
2344    GLuint MaxNativeAddressRegs; /* vertex program only, for now */
2345    GLuint MaxNativeParameters;
2346    /* For shaders */
2347    GLuint MaxUniformComponents;
2348 };
2349
2350
2351 /**
2352  * Constants which may be overridden by device driver during context creation
2353  * but are never changed after that.
2354  */
2355 struct gl_constants
2356 {
2357    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2358    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2359    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2360    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2361    GLuint MaxTextureCoordUnits;
2362    GLuint MaxTextureImageUnits;
2363    GLuint MaxTextureUnits;              /* = MIN(CoordUnits, ImageUnits) */
2364    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2365    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2366    GLuint MaxArrayLockSize;
2367    GLint SubPixelBits;
2368    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2369    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2370    GLfloat PointSizeGranularity;
2371    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2372    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2373    GLfloat LineWidthGranularity;
2374    GLuint MaxColorTableSize;
2375    GLuint MaxConvolutionWidth;
2376    GLuint MaxConvolutionHeight;
2377    GLuint MaxClipPlanes;
2378    GLuint MaxLights;
2379    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2380    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2381    GLuint MaxViewportWidth, MaxViewportHeight;
2382    struct gl_program_constants VertexProgram;    /* GL_ARB_vertex_program */
2383    struct gl_program_constants FragmentProgram;  /* GL_ARB_fragment_program */
2384    /* shared by vertex and fragment program: */
2385    GLuint MaxProgramMatrices;
2386    GLuint MaxProgramMatrixStackDepth;
2387    /* vertex array / buffer object bounds checking */
2388    GLboolean CheckArrayBounds;
2389    /* GL_ARB_draw_buffers */
2390    GLuint MaxDrawBuffers;
2391    /* GL_OES_read_format */
2392    GLenum ColorReadFormat;
2393    GLenum ColorReadType;
2394    /* GL_EXT_framebuffer_object */
2395    GLuint MaxColorAttachments;
2396    GLuint MaxRenderbufferSize;
2397    /* GL_ARB_vertex_shader */
2398    GLuint MaxVertexTextureImageUnits;
2399    GLuint MaxVaryingFloats;
2400 };
2401
2402
2403 /**
2404  * Enable flag for each OpenGL extension.  Different device drivers will
2405  * enable different extensions at runtime.
2406  */
2407 struct gl_extensions
2408 {
2409    /**
2410     * \name Flags to quickly test if certain extensions are available.
2411     *
2412     * Not every extension needs to have such a flag, but it's encouraged.
2413     */
2414    /*@{*/
2415    GLboolean dummy;  /* don't remove this! */
2416    GLboolean ARB_depth_texture;
2417    GLboolean ARB_draw_buffers;
2418    GLboolean ARB_fragment_program;
2419    GLboolean ARB_fragment_shader;
2420    GLboolean ARB_half_float_pixel;
2421    GLboolean ARB_imaging;
2422    GLboolean ARB_multisample;
2423    GLboolean ARB_multitexture;
2424    GLboolean ARB_occlusion_query;
2425    GLboolean ARB_point_sprite;
2426    GLboolean ARB_shader_objects;
2427    GLboolean ARB_shading_language_100;
2428    GLboolean ARB_shading_language_120;
2429    GLboolean ARB_shadow;
2430    GLboolean ARB_texture_border_clamp;
2431    GLboolean ARB_texture_compression;
2432    GLboolean ARB_texture_cube_map;
2433    GLboolean ARB_texture_env_combine;
2434    GLboolean ARB_texture_env_crossbar;
2435    GLboolean ARB_texture_env_dot3;
2436    GLboolean ARB_texture_float;
2437    GLboolean ARB_texture_mirrored_repeat;
2438    GLboolean ARB_texture_non_power_of_two;
2439    GLboolean ARB_transpose_matrix;
2440    GLboolean ARB_vertex_buffer_object;
2441    GLboolean ARB_vertex_program;
2442    GLboolean ARB_vertex_shader;
2443    GLboolean ARB_window_pos;
2444    GLboolean EXT_abgr;
2445    GLboolean EXT_bgra;
2446    GLboolean EXT_blend_color;
2447    GLboolean EXT_blend_equation_separate;
2448    GLboolean EXT_blend_func_separate;
2449    GLboolean EXT_blend_logic_op;
2450    GLboolean EXT_blend_minmax;
2451    GLboolean EXT_blend_subtract;
2452    GLboolean EXT_clip_volume_hint;
2453    GLboolean EXT_cull_vertex;
2454    GLboolean EXT_convolution;
2455    GLboolean EXT_compiled_vertex_array;
2456    GLboolean EXT_copy_texture;
2457    GLboolean EXT_depth_bounds_test;
2458    GLboolean EXT_draw_range_elements;
2459    GLboolean EXT_framebuffer_object;
2460    GLboolean EXT_fog_coord;
2461    GLboolean EXT_framebuffer_blit;
2462    GLboolean EXT_gpu_program_parameters;
2463    GLboolean EXT_histogram;
2464    GLboolean EXT_multi_draw_arrays;
2465    GLboolean EXT_paletted_texture;
2466    GLboolean EXT_packed_depth_stencil;
2467    GLboolean EXT_packed_pixels;
2468    GLboolean EXT_pixel_buffer_object;
2469    GLboolean EXT_point_parameters;
2470    GLboolean EXT_polygon_offset;
2471    GLboolean EXT_rescale_normal;
2472    GLboolean EXT_shadow_funcs;
2473    GLboolean EXT_secondary_color;
2474    GLboolean EXT_separate_specular_color;
2475    GLboolean EXT_shared_texture_palette;
2476    GLboolean EXT_stencil_wrap;
2477    GLboolean EXT_stencil_two_side;
2478    GLboolean EXT_subtexture;
2479    GLboolean EXT_texture;
2480    GLboolean EXT_texture_object;
2481    GLboolean EXT_texture3D;
2482    GLboolean EXT_texture_compression_s3tc;
2483    GLboolean EXT_texture_env_add;
2484    GLboolean EXT_texture_env_combine;
2485    GLboolean EXT_texture_env_dot3;
2486    GLboolean EXT_texture_filter_anisotropic;
2487    GLboolean EXT_texture_lod_bias;
2488    GLboolean EXT_texture_mirror_clamp;
2489    GLboolean EXT_texture_sRGB;
2490    GLboolean EXT_timer_query;
2491    GLboolean EXT_vertex_array;
2492    GLboolean EXT_vertex_array_set;
2493    /* vendor extensions */
2494    GLboolean APPLE_client_storage;
2495    GLboolean APPLE_packed_pixels;
2496    GLboolean APPLE_vertex_array_object;
2497    GLboolean ATI_texture_mirror_once;
2498    GLboolean ATI_texture_env_combine3;
2499    GLboolean ATI_fragment_shader;
2500    GLboolean ATI_separate_stencil;
2501    GLboolean IBM_rasterpos_clip;
2502    GLboolean IBM_multimode_draw_arrays;
2503    GLboolean MESA_pack_invert;
2504    GLboolean MESA_packed_depth_stencil;
2505    GLboolean MESA_program_debug;
2506    GLboolean MESA_resize_buffers;
2507    GLboolean MESA_ycbcr_texture;
2508    GLboolean NV_blend_square;
2509    GLboolean NV_fragment_program;
2510    GLboolean NV_light_max_exponent;
2511    GLboolean NV_point_sprite;
2512    GLboolean NV_texgen_reflection;
2513    GLboolean NV_texture_rectangle;
2514    GLboolean NV_vertex_program;
2515    GLboolean NV_vertex_program1_1;
2516    GLboolean OES_read_format;
2517    GLboolean SGI_color_matrix;
2518    GLboolean SGI_color_table;
2519    GLboolean SGI_texture_color_table;
2520    GLboolean SGIS_generate_mipmap;
2521    GLboolean SGIS_texture_edge_clamp;
2522    GLboolean SGIS_texture_lod;
2523    GLboolean SGIX_depth_texture;
2524    GLboolean SGIX_shadow;
2525    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2526    GLboolean TDFX_texture_compression_FXT1;
2527    GLboolean S3_s3tc;
2528    /*@}*/
2529    /* The extension string */
2530    const GLubyte *String;
2531 };
2532
2533
2534 /**
2535  * A stack of matrices (projection, modelview, color, texture, etc).
2536  */
2537 struct matrix_stack
2538 {
2539    GLmatrix *Top;      /**< points into Stack */
2540    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2541    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2542    GLuint MaxDepth;    /**< size of Stack[] array */
2543    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2544 };
2545
2546
2547 /**
2548  * \name Bits for image transfer operations
2549  *
2550  * \sa __GLcontextRec::ImageTransferState.
2551  */
2552 /*@{*/
2553 #define IMAGE_SCALE_BIAS_BIT                      0x1
2554 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2555 #define IMAGE_MAP_COLOR_BIT                       0x4
2556 #define IMAGE_COLOR_TABLE_BIT                     0x8
2557 #define IMAGE_CONVOLUTION_BIT                     0x10
2558 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2559 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2560 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2561 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2562 #define IMAGE_HISTOGRAM_BIT                       0x200
2563 #define IMAGE_MIN_MAX_BIT                         0x400
2564 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2565
2566
2567 /** Pixel Transfer ops up to convolution */
2568 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2569                                     IMAGE_SHIFT_OFFSET_BIT |   \
2570                                     IMAGE_MAP_COLOR_BIT |      \
2571                                     IMAGE_COLOR_TABLE_BIT)
2572
2573 /** Pixel transfer ops after convolution */
2574 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2575                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2576                                      IMAGE_COLOR_MATRIX_BIT |                 \
2577                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2578                                      IMAGE_HISTOGRAM_BIT |                    \
2579                                      IMAGE_MIN_MAX_BIT)
2580 /*@}*/
2581
2582
2583 /**
2584  * \name Bits to indicate what state has changed.
2585  *
2586  * 4 unused flags.
2587  */
2588 /*@{*/
2589 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2590 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2591 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2592 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2593 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2594 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2595 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2596 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2597 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2598 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2599 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2600 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2601 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2602 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2603 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2604 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2605 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2606 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2607 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2608 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2609 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2610 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2611 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2612 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2613 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2614 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2615 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2616 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2617 #define _NEW_ALL ~0
2618 /*@}*/
2619
2620
2621 /**
2622  * \name Bits to track array state changes
2623  *
2624  * Also used to summarize array enabled.
2625  */
2626 /*@{*/
2627 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2628 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2629 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2630 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2631 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2632 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2633 #define _NEW_ARRAY_INDEX            VERT_BIT_COLOR_INDEX
2634 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_EDGEFLAG
2635 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2636 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2637 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2638 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2639 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2640 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2641 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2642 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2643 #define _NEW_ARRAY_ATTRIB_0         VERT_BIT_GENERIC0  /* start at bit 16 */
2644 #define _NEW_ARRAY_ALL              0xffffffff
2645
2646
2647 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2648 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2649 /*@}*/
2650
2651
2652 /**
2653  * \name A bunch of flags that we think might be useful to drivers.
2654  *
2655  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2656  */
2657 /*@{*/
2658 #define DD_FLATSHADE                0x1
2659 #define DD_SEPARATE_SPECULAR        0x2
2660 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2661 #define DD_TRI_LIGHT_TWOSIDE        0x8
2662 #define DD_TRI_UNFILLED             0x10
2663 #define DD_TRI_SMOOTH               0x20
2664 #define DD_TRI_STIPPLE              0x40
2665 #define DD_TRI_OFFSET               0x80
2666 #define DD_LINE_SMOOTH              0x100
2667 #define DD_LINE_STIPPLE             0x200
2668 #define DD_LINE_WIDTH               0x400
2669 #define DD_POINT_SMOOTH             0x800
2670 #define DD_POINT_SIZE               0x1000
2671 #define DD_POINT_ATTEN              0x2000
2672 #define DD_TRI_TWOSTENCIL           0x4000
2673 /*@}*/
2674
2675
2676 /**
2677  * \name Define the state changes under which each of these bits might change
2678  */
2679 /*@{*/
2680 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2681 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2682 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2683 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2684 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2685 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2686 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2687 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2688 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2689 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2690 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2691 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2692 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2693 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2694 /*@}*/
2695
2696
2697 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2698                                            _NEW_TEXTURE |       \
2699                                            _NEW_POINT |         \
2700                                            _NEW_PROGRAM |       \
2701                                            _NEW_MODELVIEW)
2702
2703 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2704                                            _NEW_TEXTURE)
2705
2706 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2707
2708
2709
2710
2711 /*
2712  * Forward declaration of display list data types:
2713  */
2714 union node;
2715 typedef union node Node;
2716
2717
2718 /* This has to be included here. */
2719 #include "dd.h"
2720
2721
2722 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2723
2724 /**
2725  * Core Mesa's support for tnl modules:
2726  */
2727 struct gl_tnl_module
2728 {
2729    /**
2730     * Vertex format to be lazily swapped into current dispatch.
2731     */
2732    const GLvertexformat *Current;
2733
2734    /**
2735     * \name Record of functions swapped out.
2736     * On restore, only need to swap these functions back in.
2737     */
2738    /*@{*/
2739    struct {
2740        _glapi_proc * location;
2741        _glapi_proc function;
2742    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2743    GLuint SwapCount;
2744    /*@}*/
2745 };
2746
2747 /* Strictly this is a tnl/ private concept, but it doesn't seem
2748  * worthwhile adding a tnl private structure just to hold this one bit
2749  * of information:
2750  */
2751 #define MESA_DLIST_DANGLING_REFS     0x1
2752
2753 /* Provide a location where information about a display list can be
2754  * collected.  Could be extended with driverPrivate structures,
2755  * etc. in the future.
2756  */
2757 struct mesa_display_list
2758 {
2759    Node *node;
2760    GLuint id;
2761    GLbitfield flags;
2762 };
2763
2764
2765 /**
2766  * State used during display list compilation and execution.
2767  */
2768 struct mesa_list_state
2769 {
2770    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2771    GLuint CallDepth;            /**< Current recursion calling depth */
2772
2773    struct mesa_display_list *CurrentList;
2774    Node *CurrentListPtr;        /**< Head of list being compiled */
2775    GLuint CurrentListNum;       /**< Number of the list being compiled */
2776    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2777    GLuint CurrentPos;           /**< Index into current block of nodes */
2778
2779    GLvertexformat ListVtxfmt;
2780
2781    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2782    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2783
2784    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2785    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2786
2787    GLubyte ActiveIndex;
2788    GLfloat CurrentIndex;
2789
2790    GLubyte ActiveEdgeFlag;
2791    GLboolean CurrentEdgeFlag;
2792 };
2793
2794
2795 /**
2796  * Mesa rendering context.
2797  *
2798  * This is the central context data structure for Mesa.  Almost all
2799  * OpenGL state is contained in this structure.
2800  * Think of this as a base class from which device drivers will derive
2801  * sub classes.
2802  *
2803  * The GLcontext typedef names this structure.
2804  */
2805 struct __GLcontextRec
2806 {
2807    /**
2808     * \name OS related interfaces.
2809     *
2810     * These \b must be the first members of this structure, because they are
2811     * exposed to the outside world (i.e. GLX extension).
2812     */
2813    /*@{*/
2814    __GLimports imports;
2815    __GLexports exports;
2816    /*@}*/
2817
2818    /** State possibly shared with other contexts in the address space */
2819    struct gl_shared_state *Shared;
2820
2821    /** \name API function pointer tables */
2822    /*@{*/
2823    struct _glapi_table *Save;   /**< Display list save functions */
2824    struct _glapi_table *Exec;   /**< Execute functions */
2825    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2826    /*@}*/
2827
2828    GLvisual Visual;
2829    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2830    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2831    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2832    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2833
2834    /**
2835     * Device driver function pointer table
2836     */
2837    struct dd_function_table Driver;
2838
2839    void *DriverCtx;     /**< Points to device driver context/state */
2840    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2841
2842    /** Core/Driver constants */
2843    struct gl_constants Const;
2844
2845    /** \name The various 4x4 matrix stacks */
2846    /*@{*/
2847    struct matrix_stack ModelviewMatrixStack;
2848    struct matrix_stack ProjectionMatrixStack;
2849    struct matrix_stack ColorMatrixStack;
2850    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2851    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2852    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2853    /*@}*/
2854
2855    /** Combined modelview and projection matrix */
2856    GLmatrix _ModelProjectMatrix;
2857
2858    /** \name Display lists */
2859    struct mesa_list_state ListState;
2860
2861    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2862    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2863
2864    /** Extension information */
2865    struct gl_extensions Extensions;
2866
2867    /** \name State attribute stack (for glPush/PopAttrib) */
2868    /*@{*/
2869    GLuint AttribStackDepth;
2870    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2871    /*@}*/
2872
2873    /** \name Renderer attribute groups
2874     *
2875     * We define a struct for each attribute group to make pushing and popping
2876     * attributes easy.  Also it's a good organization.
2877     */
2878    /*@{*/
2879    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
2880    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
2881    struct gl_current_attrib     Current;        /**< Current attributes */
2882    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2883    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2884    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2885    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2886    struct gl_light_attrib       Light;          /**< Light attributes */
2887    struct gl_line_attrib        Line;           /**< Line attributes */
2888    struct gl_list_attrib        List;           /**< List attributes */
2889    struct gl_multisample_attrib Multisample;
2890    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2891    struct gl_point_attrib       Point;          /**< Point attributes */
2892    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2893    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2894    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2895    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2896    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2897    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2898    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2899    /*@}*/
2900
2901    /** \name Client attribute stack */
2902    /*@{*/
2903    GLuint ClientAttribStackDepth;
2904    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2905    /*@}*/
2906
2907    /** \name Client attribute groups */
2908    /*@{*/
2909    struct gl_array_attrib       Array;  /**< Vertex arrays */
2910    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2911    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2912    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2913    /*@}*/
2914
2915    /** \name Other assorted state (not pushed/popped on attribute stack) */
2916    /*@{*/
2917    struct gl_pixelmaps          PixelMaps;
2918    struct gl_histogram_attrib   Histogram;
2919    struct gl_minmax_attrib      MinMax;
2920    struct gl_convolution_attrib Convolution1D;
2921    struct gl_convolution_attrib Convolution2D;
2922    struct gl_convolution_attrib Separable2D;
2923
2924    struct gl_evaluators EvalMap;   /**< All evaluators */
2925    struct gl_feedback   Feedback;  /**< Feedback */
2926    struct gl_selection  Select;    /**< Selection */
2927
2928    struct gl_color_table ColorTable[COLORTABLE_MAX];
2929    struct gl_color_table ProxyColorTable[COLORTABLE_MAX];
2930 #if 0
2931    struct gl_color_table PostConvolutionColorTable;
2932    struct gl_color_table ProxyPostConvolutionColorTable;
2933    struct gl_color_table PostColorMatrixColorTable;
2934    struct gl_color_table ProxyPostColorMatrixColorTable;
2935 #endif
2936
2937    struct gl_program_state Program;        /**< for vertex or fragment progs */
2938    struct gl_vertex_program_state VertexProgram;   /**< GL_ARB/NV_vertex_program */
2939    struct gl_fragment_program_state FragmentProgram;  /**< GL_ARB/NV_vertex_program */
2940    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
2941
2942    struct gl_fragment_program *_TexEnvProgram;     /**< Texture state as fragment program */
2943    struct gl_vertex_program *_TnlProgram;          /**< Fixed func TNL state as vertex program */
2944
2945    GLboolean _MaintainTnlProgram;
2946    GLboolean _MaintainTexEnvProgram;
2947    GLboolean _UseTexEnvProgram;
2948
2949    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
2950
2951    struct gl_shader_objects_state ShaderObjects;        /* GL_ARB_shader_objects */
2952    /*@}*/
2953
2954 #if FEATURE_EXT_framebuffer_object
2955    struct gl_renderbuffer *CurrentRenderbuffer;
2956 #endif
2957
2958    GLenum ErrorValue;        /**< Last error code */
2959    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2960    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
2961
2962    /** \name Derived state */
2963    /*@{*/
2964    GLbitfield _TriangleCaps;      /**< bitwise-or of DD_* flags */
2965    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2966    GLfloat _EyeZDir[3];
2967    GLfloat _ModelViewInvScale;
2968    GLboolean _NeedEyeCoords;
2969    GLboolean _ForceEyeCoords;
2970    GLenum _CurrentProgram;    /* currently executing program */
2971
2972    GLuint TextureStateTimestamp; /* detect changes to shared state */
2973
2974    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2975    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2976    /**@}*/
2977
2978    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2979
2980
2981    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2982                     *
2983                     * We don't have a better way to communicate this value from
2984                     * swrast_setup to swrast. */
2985
2986    /** \name For debugging/development only */
2987    /*@{*/
2988    GLboolean FirstTimeCurrent;
2989    /*@}*/
2990
2991    /** Dither disable via MESA_NO_DITHER env var */
2992    GLboolean NoDither;
2993
2994    /** software compression/decompression supported or not */
2995    GLboolean Mesa_DXTn;
2996
2997    /** Core tnl module support */
2998    struct gl_tnl_module TnlModule;
2999
3000    /**
3001     * \name Hooks for module contexts.
3002     *
3003     * These will eventually live in the driver or elsewhere.
3004     */
3005    /*@{*/
3006    void *swrast_context;
3007    void *swsetup_context;
3008    void *swtnl_context;
3009    void *swtnl_im;
3010    void *acache_context;
3011    void *aelt_context;
3012    /*@}*/
3013 };
3014
3015
3016 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
3017 extern const char *_mesa_prim_name[GL_POLYGON+4];
3018
3019
3020 #ifdef DEBUG
3021 extern int MESA_VERBOSE;
3022 extern int MESA_DEBUG_FLAGS;
3023 # define MESA_FUNCTION __FUNCTION__
3024 #else
3025 # define MESA_VERBOSE 0
3026 # define MESA_DEBUG_FLAGS 0
3027 # define MESA_FUNCTION "a function"
3028 # ifndef NDEBUG
3029 #  define NDEBUG
3030 # endif
3031 #endif
3032
3033
3034 enum _verbose
3035 {
3036    VERBOSE_VARRAY               = 0x0001,
3037    VERBOSE_TEXTURE              = 0x0002,
3038    VERBOSE_IMMEDIATE            = 0x0004,
3039    VERBOSE_PIPELINE             = 0x0008,
3040    VERBOSE_DRIVER               = 0x0010,
3041    VERBOSE_STATE                = 0x0020,
3042    VERBOSE_API                  = 0x0040,
3043    VERBOSE_DISPLAY_LIST         = 0x0100,
3044    VERBOSE_LIGHTING             = 0x0200,
3045    VERBOSE_PRIMS                = 0x0400,
3046    VERBOSE_VERTS                = 0x0800,
3047    VERBOSE_DISASSEM             = 0x1000
3048 };
3049
3050
3051 enum _debug
3052 {
3053    DEBUG_ALWAYS_FLUSH           = 0x1
3054 };
3055
3056
3057
3058 #define Elements(x) sizeof(x)/sizeof(*(x))
3059
3060
3061 #endif /* TYPES_H */