src/mesa/main/mtypes.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.7
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file mtypes.h
  28  * Main Mesa data structures.
  29  *
  30  * Please try to mark derived values with a leading underscore ('_').
  31  */
  32
  33 #ifndef MTYPES_H
  34 #define MTYPES_H
  35
  36
  37 #include "main/glheader.h"
  38 #include "main/config.h"
  39 #include "main/mfeatures.h"
  40 #include "glapi/glapi.h"
  41 #include "math/m_matrix.h"      /* GLmatrix */
  42 #include "main/simple_list.h"   /* struct simple_node */
  43 #include "main/formats.h"       /* MESA_FORMAT_COUNT */
  44
  45
  46 /**
  47  * Stencil buffer data type.
  48  */
  49 #if STENCIL_BITS==8
  50    typedef GLubyte GLstencil;
  51 #elif STENCIL_BITS==16
  52    typedef GLushort GLstencil;
  53 #else
  54 #  error "illegal number of stencil bits"
  55 #endif
  56
  57
  58 /**
  59  * \name 64-bit extension of GLbitfield.
  60  */
  61 /*@{*/
  62 typedef GLuint64 GLbitfield64;
  63
  64 /** Set a single bit */
  65 #define BITFIELD64_BIT(b)      ((GLbitfield64)1 << (b))
  66
  67
  68 /**
  69  * \name Some forward type declarations
  70  */
  71 /*@{*/
  72 struct _mesa_HashTable;
  73 struct gl_attrib_node;
  74 struct gl_list_extensions;
  75 struct gl_meta_state;
  76 struct gl_pixelstore_attrib;
  77 struct gl_program_cache;
  78 struct gl_texture_format;
  79 struct gl_texture_image;
  80 struct gl_texture_object;
  81 struct gl_context;
  82 struct st_context;
  83 /*@}*/
  84
  85
  86 /** Extra draw modes beyond GL_POINTS, GL_TRIANGLE_FAN, etc */
  87 #define PRIM_OUTSIDE_BEGIN_END   (GL_POLYGON+1)
  88 #define PRIM_INSIDE_UNKNOWN_PRIM (GL_POLYGON+2)
  89 #define PRIM_UNKNOWN             (GL_POLYGON+3)
  90
  91
  92 /**
  93  * Shader stages. Note that these will become 5 with tessellation.
  94  * These MUST have the same values as gallium's PIPE_SHADER_*
  95  */
  96 typedef enum
  97 {
  98    MESA_SHADER_VERTEX = 0,
  99    MESA_SHADER_FRAGMENT = 1,
 100    MESA_SHADER_GEOMETRY = 2,
 101    MESA_SHADER_TYPES = 3
 102 } gl_shader_type;
 103
 104
 105
 106 /**
 107  * Indexes for vertex program attributes.
 108  * GL_NV_vertex_program aliases generic attributes over the conventional
 109  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 110  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 111  * generic attributes are distinct/separate).
 112  */
 113 typedef enum
 114 {
 115    VERT_ATTRIB_POS = 0,
 116    VERT_ATTRIB_WEIGHT = 1,
 117    VERT_ATTRIB_NORMAL = 2,
 118    VERT_ATTRIB_COLOR0 = 3,
 119    VERT_ATTRIB_COLOR1 = 4,
 120    VERT_ATTRIB_FOG = 5,
 121    VERT_ATTRIB_COLOR_INDEX = 6,
 122    VERT_ATTRIB_POINT_SIZE = 6,  /*alias*/
 123    VERT_ATTRIB_EDGEFLAG = 7,
 124    VERT_ATTRIB_TEX0 = 8,
 125    VERT_ATTRIB_TEX1 = 9,
 126    VERT_ATTRIB_TEX2 = 10,
 127    VERT_ATTRIB_TEX3 = 11,
 128    VERT_ATTRIB_TEX4 = 12,
 129    VERT_ATTRIB_TEX5 = 13,
 130    VERT_ATTRIB_TEX6 = 14,
 131    VERT_ATTRIB_TEX7 = 15,
 132    VERT_ATTRIB_GENERIC0 = 16,
 133    VERT_ATTRIB_GENERIC1 = 17,
 134    VERT_ATTRIB_GENERIC2 = 18,
 135    VERT_ATTRIB_GENERIC3 = 19,
 136    VERT_ATTRIB_GENERIC4 = 20,
 137    VERT_ATTRIB_GENERIC5 = 21,
 138    VERT_ATTRIB_GENERIC6 = 22,
 139    VERT_ATTRIB_GENERIC7 = 23,
 140    VERT_ATTRIB_GENERIC8 = 24,
 141    VERT_ATTRIB_GENERIC9 = 25,
 142    VERT_ATTRIB_GENERIC10 = 26,
 143    VERT_ATTRIB_GENERIC11 = 27,
 144    VERT_ATTRIB_GENERIC12 = 28,
 145    VERT_ATTRIB_GENERIC13 = 29,
 146    VERT_ATTRIB_GENERIC14 = 30,
 147    VERT_ATTRIB_GENERIC15 = 31,
 148    VERT_ATTRIB_MAX = 32
 149 } gl_vert_attrib;
 150
 151 /**
 152  * Bitflags for vertex attributes.
 153  * These are used in bitfields in many places.
 154  */
 155 /*@{*/
 156 #define VERT_BIT_POS         (1 << VERT_ATTRIB_POS)
 157 #define VERT_BIT_WEIGHT      (1 << VERT_ATTRIB_WEIGHT)
 158 #define VERT_BIT_NORMAL      (1 << VERT_ATTRIB_NORMAL)
 159 #define VERT_BIT_COLOR0      (1 << VERT_ATTRIB_COLOR0)
 160 #define VERT_BIT_COLOR1      (1 << VERT_ATTRIB_COLOR1)
 161 #define VERT_BIT_FOG         (1 << VERT_ATTRIB_FOG)
 162 #define VERT_BIT_COLOR_INDEX (1 << VERT_ATTRIB_COLOR_INDEX)
 163 #define VERT_BIT_EDGEFLAG    (1 << VERT_ATTRIB_EDGEFLAG)
 164 #define VERT_BIT_TEX0        (1 << VERT_ATTRIB_TEX0)
 165 #define VERT_BIT_TEX1        (1 << VERT_ATTRIB_TEX1)
 166 #define VERT_BIT_TEX2        (1 << VERT_ATTRIB_TEX2)
 167 #define VERT_BIT_TEX3        (1 << VERT_ATTRIB_TEX3)
 168 #define VERT_BIT_TEX4        (1 << VERT_ATTRIB_TEX4)
 169 #define VERT_BIT_TEX5        (1 << VERT_ATTRIB_TEX5)
 170 #define VERT_BIT_TEX6        (1 << VERT_ATTRIB_TEX6)
 171 #define VERT_BIT_TEX7        (1 << VERT_ATTRIB_TEX7)
 172 #define VERT_BIT_GENERIC0    (1 << VERT_ATTRIB_GENERIC0)
 173 #define VERT_BIT_GENERIC1    (1 << VERT_ATTRIB_GENERIC1)
 174 #define VERT_BIT_GENERIC2    (1 << VERT_ATTRIB_GENERIC2)
 175 #define VERT_BIT_GENERIC3    (1 << VERT_ATTRIB_GENERIC3)
 176 #define VERT_BIT_GENERIC4    (1 << VERT_ATTRIB_GENERIC4)
 177 #define VERT_BIT_GENERIC5    (1 << VERT_ATTRIB_GENERIC5)
 178 #define VERT_BIT_GENERIC6    (1 << VERT_ATTRIB_GENERIC6)
 179 #define VERT_BIT_GENERIC7    (1 << VERT_ATTRIB_GENERIC7)
 180 #define VERT_BIT_GENERIC8    (1 << VERT_ATTRIB_GENERIC8)
 181 #define VERT_BIT_GENERIC9    (1 << VERT_ATTRIB_GENERIC9)
 182 #define VERT_BIT_GENERIC10   (1 << VERT_ATTRIB_GENERIC10)
 183 #define VERT_BIT_GENERIC11   (1 << VERT_ATTRIB_GENERIC11)
 184 #define VERT_BIT_GENERIC12   (1 << VERT_ATTRIB_GENERIC12)
 185 #define VERT_BIT_GENERIC13   (1 << VERT_ATTRIB_GENERIC13)
 186 #define VERT_BIT_GENERIC14   (1 << VERT_ATTRIB_GENERIC14)
 187 #define VERT_BIT_GENERIC15   (1 << VERT_ATTRIB_GENERIC15)
 188
 189 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 190 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 191 /*@}*/
 192
 193
 194 /**
 195  * Indexes for vertex program result attributes.  Note that
 196  * _mesa_vert_result_to_frag_attrib() and _mesa_frag_attrib_to_vert_result() make
 197  * assumptions about the layout of this enum.
 198  */
 199 typedef enum
 200 {
 201    VERT_RESULT_HPOS = 0,
 202    VERT_RESULT_COL0 = 1,
 203    VERT_RESULT_COL1 = 2,
 204    VERT_RESULT_FOGC = 3,
 205    VERT_RESULT_TEX0 = 4,
 206    VERT_RESULT_TEX1 = 5,
 207    VERT_RESULT_TEX2 = 6,
 208    VERT_RESULT_TEX3 = 7,
 209    VERT_RESULT_TEX4 = 8,
 210    VERT_RESULT_TEX5 = 9,
 211    VERT_RESULT_TEX6 = 10,
 212    VERT_RESULT_TEX7 = 11,
 213    VERT_RESULT_PSIZ = 12,
 214    VERT_RESULT_BFC0 = 13,
 215    VERT_RESULT_BFC1 = 14,
 216    VERT_RESULT_EDGE = 15,
 217    VERT_RESULT_VAR0 = 16,  /**< shader varying */
 218    VERT_RESULT_MAX = (VERT_RESULT_VAR0 + MAX_VARYING)
 219 } gl_vert_result;
 220
 221
 222 /*********************************************/
 223
 224 /**
 225  * Indexes for geometry program attributes.
 226  */
 227 typedef enum
 228 {
 229    GEOM_ATTRIB_POSITION = 0,
 230    GEOM_ATTRIB_COLOR0 = 1,
 231    GEOM_ATTRIB_COLOR1 = 2,
 232    GEOM_ATTRIB_SECONDARY_COLOR0 = 3,
 233    GEOM_ATTRIB_SECONDARY_COLOR1 = 4,
 234    GEOM_ATTRIB_FOG_FRAG_COORD = 5,
 235    GEOM_ATTRIB_POINT_SIZE = 6,
 236    GEOM_ATTRIB_CLIP_VERTEX = 7,
 237    GEOM_ATTRIB_PRIMITIVE_ID = 8,
 238    GEOM_ATTRIB_TEX_COORD = 9,
 239
 240    GEOM_ATTRIB_VAR0 = 16,
 241    GEOM_ATTRIB_MAX = (GEOM_ATTRIB_VAR0 + MAX_VARYING)
 242 } gl_geom_attrib;
 243
 244 /**
 245  * Bitflags for geometry attributes.
 246  * These are used in bitfields in many places.
 247  */
 248 /*@{*/
 249 #define GEOM_BIT_COLOR0      (1 << GEOM_ATTRIB_COLOR0)
 250 #define GEOM_BIT_COLOR1      (1 << GEOM_ATTRIB_COLOR1)
 251 #define GEOM_BIT_SCOLOR0     (1 << GEOM_ATTRIB_SECONDARY_COLOR0)
 252 #define GEOM_BIT_SCOLOR1     (1 << GEOM_ATTRIB_SECONDARY_COLOR1)
 253 #define GEOM_BIT_TEX_COORD   (1 << GEOM_ATTRIB_TEX_COORD)
 254 #define GEOM_BIT_FOG_COORD   (1 << GEOM_ATTRIB_FOG_FRAG_COORD)
 255 #define GEOM_BIT_POSITION    (1 << GEOM_ATTRIB_POSITION)
 256 #define GEOM_BIT_POINT_SIDE  (1 << GEOM_ATTRIB_POINT_SIZE)
 257 #define GEOM_BIT_CLIP_VERTEX (1 << GEOM_ATTRIB_CLIP_VERTEX)
 258 #define GEOM_BIT_PRIM_ID     (1 << GEOM_ATTRIB_PRIMITIVE_ID)
 259 #define GEOM_BIT_VAR0        (1 << GEOM_ATTRIB_VAR0)
 260
 261 #define GEOM_BIT_VAR(g)  (1 << (GEOM_BIT_VAR0 + (g)))
 262 /*@}*/
 263
 264
 265 /**
 266  * Indexes for geometry program result attributes
 267  */
 268 typedef enum
 269 {
 270    GEOM_RESULT_POS  = 0,
 271    GEOM_RESULT_COL0  = 1,
 272    GEOM_RESULT_COL1  = 2,
 273    GEOM_RESULT_SCOL0 = 3,
 274    GEOM_RESULT_SCOL1 = 4,
 275    GEOM_RESULT_FOGC = 5,
 276    GEOM_RESULT_TEX0 = 6,
 277    GEOM_RESULT_TEX1 = 7,
 278    GEOM_RESULT_TEX2 = 8,
 279    GEOM_RESULT_TEX3 = 9,
 280    GEOM_RESULT_TEX4 = 10,
 281    GEOM_RESULT_TEX5 = 11,
 282    GEOM_RESULT_TEX6 = 12,
 283    GEOM_RESULT_TEX7 = 13,
 284    GEOM_RESULT_PSIZ = 14,
 285    GEOM_RESULT_CLPV = 15,
 286    GEOM_RESULT_PRID = 16,
 287    GEOM_RESULT_LAYR = 17,
 288    GEOM_RESULT_VAR0 = 18,  /**< shader varying, should really be 16 */
 289    /* ### we need to -2 because var0 is 18 instead 16 like in the others */
 290    GEOM_RESULT_MAX  =  (GEOM_RESULT_VAR0 + MAX_VARYING - 2)
 291 } gl_geom_result;
 292
 293
 294 /**
 295  * Indexes for fragment program input attributes.  Note that
 296  * _mesa_vert_result_to_frag_attrib() and frag_attrib_to_vert_result() make
 297  * assumptions about the layout of this enum.
 298  */
 299 typedef enum
 300 {
 301    FRAG_ATTRIB_WPOS = 0,
 302    FRAG_ATTRIB_COL0 = 1,
 303    FRAG_ATTRIB_COL1 = 2,
 304    FRAG_ATTRIB_FOGC = 3,
 305    FRAG_ATTRIB_TEX0 = 4,
 306    FRAG_ATTRIB_TEX1 = 5,
 307    FRAG_ATTRIB_TEX2 = 6,
 308    FRAG_ATTRIB_TEX3 = 7,
 309    FRAG_ATTRIB_TEX4 = 8,
 310    FRAG_ATTRIB_TEX5 = 9,
 311    FRAG_ATTRIB_TEX6 = 10,
 312    FRAG_ATTRIB_TEX7 = 11,
 313    FRAG_ATTRIB_FACE = 12,  /**< front/back face */
 314    FRAG_ATTRIB_PNTC = 13,  /**< sprite/point coord */
 315    FRAG_ATTRIB_VAR0 = 14,  /**< shader varying */
 316    FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + MAX_VARYING)
 317 } gl_frag_attrib;
 318
 319
 320 /**
 321  * Convert from a gl_vert_result value to the corresponding gl_frag_attrib.
 322  *
 323  * VERT_RESULT_HPOS is converted to FRAG_ATTRIB_WPOS.
 324  *
 325  * gl_vert_result values which have no corresponding gl_frag_attrib
 326  * (VERT_RESULT_PSIZ, VERT_RESULT_BFC0, VERT_RESULT_BFC1, and
 327  * VERT_RESULT_EDGE) are converted to a value of -1.
 328  */
 329 static INLINE int
 330 _mesa_vert_result_to_frag_attrib(gl_vert_result vert_result)
 331 {
 332    if (vert_result >= VERT_RESULT_VAR0)
 333       return vert_result - VERT_RESULT_VAR0 + FRAG_ATTRIB_VAR0;
 334    else if (vert_result <= VERT_RESULT_TEX7)
 335       return vert_result;
 336    else
 337       return -1;
 338 }
 339
 340
 341 /**
 342  * Convert from a gl_frag_attrib value to the corresponding gl_vert_result.
 343  *
 344  * FRAG_ATTRIB_WPOS is converted to VERT_RESULT_HPOS.
 345  *
 346  * gl_frag_attrib values which have no corresponding gl_vert_result
 347  * (FRAG_ATTRIB_FACE and FRAG_ATTRIB_PNTC) are converted to a value of -1.
 348  */
 349 static INLINE int
 350 _mesa_frag_attrib_to_vert_result(gl_frag_attrib frag_attrib)
 351 {
 352    if (frag_attrib <= FRAG_ATTRIB_TEX7)
 353       return frag_attrib;
 354    else if (frag_attrib >= FRAG_ATTRIB_VAR0)
 355       return frag_attrib - FRAG_ATTRIB_VAR0 + VERT_RESULT_VAR0;
 356    else
 357       return -1;
 358 }
 359
 360
 361 /**
 362  * Bitflags for fragment program input attributes.
 363  */
 364 /*@{*/
 365 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 366 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 367 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 368 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 369 #define FRAG_BIT_FACE  (1 << FRAG_ATTRIB_FACE)
 370 #define FRAG_BIT_PNTC  (1 << FRAG_ATTRIB_PNTC)
 371 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 372 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 373 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 374 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 375 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 376 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 377 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 378 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 379 #define FRAG_BIT_VAR0  (1 << FRAG_ATTRIB_VAR0)
 380
 381 #define FRAG_BIT_TEX(U)  (FRAG_BIT_TEX0 << (U))
 382 #define FRAG_BIT_VAR(V)  (FRAG_BIT_VAR0 << (V))
 383
 384 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 385                            FRAG_BIT_TEX1|       \
 386                            FRAG_BIT_TEX2|       \
 387                            FRAG_BIT_TEX3|       \
 388                            FRAG_BIT_TEX4|       \
 389                            FRAG_BIT_TEX5|       \
 390                            FRAG_BIT_TEX6|       \
 391                            FRAG_BIT_TEX7)
 392 /*@}*/
 393
 394
 395 /**
 396  * Fragment program results
 397  */
 398 typedef enum
 399 {
 400    FRAG_RESULT_DEPTH = 0,
 401    FRAG_RESULT_STENCIL = 1,
 402    /* If a single color should be written to all render targets, this
 403     * register is written.  No FRAG_RESULT_DATAn will be written.
 404     */
 405    FRAG_RESULT_COLOR = 2,
 406
 407    /* FRAG_RESULT_DATAn are the per-render-target (GLSL gl_FragData[n]
 408     * or ARB_fragment_program fragment.color[n]) color results.  If
 409     * any are written, FRAG_RESULT_COLOR will not be written.
 410     */
 411    FRAG_RESULT_DATA0 = 3,
 412    FRAG_RESULT_MAX = (FRAG_RESULT_DATA0 + MAX_DRAW_BUFFERS)
 413 } gl_frag_result;
 414
 415
 416 /**
 417  * Indexes for all renderbuffers
 418  */
 419 typedef enum
 420 {
 421    /* the four standard color buffers */
 422    BUFFER_FRONT_LEFT,
 423    BUFFER_BACK_LEFT,
 424    BUFFER_FRONT_RIGHT,
 425    BUFFER_BACK_RIGHT,
 426    BUFFER_DEPTH,
 427    BUFFER_STENCIL,
 428    BUFFER_ACCUM,
 429    /* optional aux buffer */
 430    BUFFER_AUX0,
 431    /* generic renderbuffers */
 432    BUFFER_COLOR0,
 433    BUFFER_COLOR1,
 434    BUFFER_COLOR2,
 435    BUFFER_COLOR3,
 436    BUFFER_COLOR4,
 437    BUFFER_COLOR5,
 438    BUFFER_COLOR6,
 439    BUFFER_COLOR7,
 440    BUFFER_COUNT
 441 } gl_buffer_index;
 442
 443 /**
 444  * Bit flags for all renderbuffers
 445  */
 446 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 447 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 448 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 449 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 450 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 451 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 452 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 453 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 454 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 455 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 456 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 457 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 458 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 459 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 460 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 461 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 462 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 463 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 464 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 465
 466 /**
 467  * Mask of all the color buffer bits (but not accum).
 468  */
 469 #define BUFFER_BITS_COLOR  (BUFFER_BIT_FRONT_LEFT | \
 470                             BUFFER_BIT_BACK_LEFT | \
 471                             BUFFER_BIT_FRONT_RIGHT | \
 472                             BUFFER_BIT_BACK_RIGHT | \
 473                             BUFFER_BIT_AUX0 | \
 474                             BUFFER_BIT_COLOR0 | \
 475                             BUFFER_BIT_COLOR1 | \
 476                             BUFFER_BIT_COLOR2 | \
 477                             BUFFER_BIT_COLOR3 | \
 478                             BUFFER_BIT_COLOR4 | \
 479                             BUFFER_BIT_COLOR5 | \
 480                             BUFFER_BIT_COLOR6 | \
 481                             BUFFER_BIT_COLOR7)
 482
 483
 484 /**
 485  * Framebuffer configuration (aka visual / pixelformat)
 486  * Note: some of these fields should be boolean, but it appears that
 487  * code in drivers/dri/common/util.c requires int-sized fields.
 488  */
 489 struct gl_config
 490 {
 491    GLboolean rgbMode;
 492    GLboolean floatMode;
 493    GLboolean colorIndexMode;  /* XXX is this used anywhere? */
 494    GLuint doubleBufferMode;
 495    GLuint stereoMode;
 496
 497    GLboolean haveAccumBuffer;
 498    GLboolean haveDepthBuffer;
 499    GLboolean haveStencilBuffer;
 500
 501    GLint redBits, greenBits, blueBits, alphaBits;       /* bits per comp */
 502    GLuint redMask, greenMask, blueMask, alphaMask;
 503    GLint rgbBits;               /* total bits for rgb */
 504    GLint indexBits;             /* total bits for colorindex */
 505
 506    GLint accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits;
 507    GLint depthBits;
 508    GLint stencilBits;
 509
 510    GLint numAuxBuffers;
 511
 512    GLint level;
 513
 514    /* EXT_visual_rating / GLX 1.2 */
 515    GLint visualRating;
 516
 517    /* EXT_visual_info / GLX 1.2 */
 518    GLint transparentPixel;
 519    /*    colors are floats scaled to ints */
 520    GLint transparentRed, transparentGreen, transparentBlue, transparentAlpha;
 521    GLint transparentIndex;
 522
 523    /* ARB_multisample / SGIS_multisample */
 524    GLint sampleBuffers;
 525    GLint samples;
 526
 527    /* SGIX_pbuffer / GLX 1.3 */
 528    GLint maxPbufferWidth;
 529    GLint maxPbufferHeight;
 530    GLint maxPbufferPixels;
 531    GLint optimalPbufferWidth;   /* Only for SGIX_pbuffer. */
 532    GLint optimalPbufferHeight;  /* Only for SGIX_pbuffer. */
 533
 534    /* OML_swap_method */
 535    GLint swapMethod;
 536
 537    /* EXT_texture_from_pixmap */
 538    GLint bindToTextureRgb;
 539    GLint bindToTextureRgba;
 540    GLint bindToMipmapTexture;
 541    GLint bindToTextureTargets;
 542    GLint yInverted;
 543
 544    /* EXT_framebuffer_sRGB */
 545    GLint sRGBCapable;
 546 };
 547
 548
 549 /**
 550  * \name Bit flags used for updating material values.
 551  */
 552 /*@{*/
 553 #define MAT_ATTRIB_FRONT_AMBIENT           0
 554 #define MAT_ATTRIB_BACK_AMBIENT            1
 555 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 556 #define MAT_ATTRIB_BACK_DIFFUSE            3
 557 #define MAT_ATTRIB_FRONT_SPECULAR          4
 558 #define MAT_ATTRIB_BACK_SPECULAR           5
 559 #define MAT_ATTRIB_FRONT_EMISSION          6
 560 #define MAT_ATTRIB_BACK_EMISSION           7
 561 #define MAT_ATTRIB_FRONT_SHININESS         8
 562 #define MAT_ATTRIB_BACK_SHININESS          9
 563 #define MAT_ATTRIB_FRONT_INDEXES           10
 564 #define MAT_ATTRIB_BACK_INDEXES            11
 565 #define MAT_ATTRIB_MAX                     12
 566
 567 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 568 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 569 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 570 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 571 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 572 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 573
 574 #define MAT_INDEX_AMBIENT  0
 575 #define MAT_INDEX_DIFFUSE  1
 576 #define MAT_INDEX_SPECULAR 2
 577
 578 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 579 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 580 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 581 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 582 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 583 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 584 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 585 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 586 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 587 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 588 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 589 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 590
 591
 592 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 593                                  MAT_BIT_FRONT_AMBIENT |        \
 594                                  MAT_BIT_FRONT_DIFFUSE |        \
 595                                  MAT_BIT_FRONT_SPECULAR |       \
 596                                  MAT_BIT_FRONT_SHININESS |      \
 597                                  MAT_BIT_FRONT_INDEXES)
 598
 599 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 600                                  MAT_BIT_BACK_AMBIENT |         \
 601                                  MAT_BIT_BACK_DIFFUSE |         \
 602                                  MAT_BIT_BACK_SPECULAR |        \
 603                                  MAT_BIT_BACK_SHININESS |       \
 604                                  MAT_BIT_BACK_INDEXES)
 605
 606 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 607 /*@}*/
 608
 609
 610 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 611 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 612
 613 /**
 614  * Material shininess lookup table.
 615  */
 616 struct gl_shine_tab
 617 {
 618    struct gl_shine_tab *next, *prev;
 619    GLfloat tab[SHINE_TABLE_SIZE+1];
 620    GLfloat shininess;
 621    GLuint refcount;
 622 };
 623
 624
 625 /**
 626  * Light source state.
 627  */
 628 struct gl_light
 629 {
 630    struct gl_light *next;       /**< double linked list with sentinel */
 631    struct gl_light *prev;
 632
 633    GLfloat Ambient[4];          /**< ambient color */
 634    GLfloat Diffuse[4];          /**< diffuse color */
 635    GLfloat Specular[4];         /**< specular color */
 636    GLfloat EyePosition[4];      /**< position in eye coordinates */
 637    GLfloat SpotDirection[4];    /**< spotlight direction in eye coordinates */
 638    GLfloat SpotExponent;
 639    GLfloat SpotCutoff;          /**< in degrees */
 640    GLfloat _CosCutoffNeg;       /**< = cos(SpotCutoff) */
 641    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 642    GLfloat ConstantAttenuation;
 643    GLfloat LinearAttenuation;
 644    GLfloat QuadraticAttenuation;
 645    GLboolean Enabled;           /**< On/off flag */
 646
 647    /**
 648     * \name Derived fields
 649     */
 650    /*@{*/
 651    GLbitfield _Flags;           /**< State */
 652
 653    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 654    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 655    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 656    GLfloat _NormSpotDirection[4]; /**< normalized spotlight direction */
 657    GLfloat _VP_inf_spot_attenuation;
 658
 659    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 660    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 661    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 662    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 663    GLfloat _dli;                /**< CI diffuse light intensity */
 664    GLfloat _sli;                /**< CI specular light intensity */
 665    /*@}*/
 666 };
 667
 668
 669 /**
 670  * Light model state.
 671  */
 672 struct gl_lightmodel
 673 {
 674    GLfloat Ambient[4];          /**< ambient color */
 675    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 676    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 677    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 678                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 679 };
 680
 681
 682 /**
 683  * Material state.
 684  */
 685 struct gl_material
 686 {
 687    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 688 };
 689
 690
 691 /**
 692  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 693  */
 694 struct gl_accum_attrib
 695 {
 696    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 697 };
 698
 699
 700 /**
 701  * Used for storing clear color, texture border color, etc.
 702  * The float values are typically unclamped.
 703  */
 704 union gl_color_union
 705 {
 706    GLfloat f[4];
 707    GLint i[4];
 708    GLuint ui[4];
 709 };
 710
 711
 712 /**
 713  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 714  */
 715 struct gl_colorbuffer_attrib
 716 {
 717    GLuint ClearIndex;                      /**< Index for glClear */
 718    union gl_color_union ClearColor;        /**< Color for glClear, unclamped */
 719    GLuint IndexMask;                       /**< Color index write mask */
 720    GLubyte ColorMask[MAX_DRAW_BUFFERS][4]; /**< Each flag is 0xff or 0x0 */
 721
 722    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 723
 724    /**
 725     * \name alpha testing
 726     */
 727    /*@{*/
 728    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 729    GLenum AlphaFunc;                    /**< Alpha test function */
 730    GLfloat AlphaRefUnclamped;
 731    GLclampf AlphaRef;                   /**< Alpha reference value */
 732    /*@}*/
 733
 734    /**
 735     * \name Blending
 736     */
 737    /*@{*/
 738    GLbitfield BlendEnabled;             /**< Per-buffer blend enable flags */
 739
 740    /* NOTE: this does _not_ depend on fragment clamping or any other clamping
 741     * control, only on the fixed-pointness of the render target.
 742     * The query does however depend on fragment color clamping.
 743     */
 744    GLfloat BlendColorUnclamped[4];               /**< Blending color */
 745    GLfloat BlendColor[4];               /**< Blending color */
 746
 747    struct
 748    {
 749       GLenum SrcRGB;             /**< RGB blend source term */
 750       GLenum DstRGB;             /**< RGB blend dest term */
 751       GLenum SrcA;               /**< Alpha blend source term */
 752       GLenum DstA;               /**< Alpha blend dest term */
 753       GLenum EquationRGB;        /**< GL_ADD, GL_SUBTRACT, etc. */
 754       GLenum EquationA;          /**< GL_ADD, GL_SUBTRACT, etc. */
 755    } Blend[MAX_DRAW_BUFFERS];
 756    /** Are the blend func terms currently different for each buffer/target? */
 757    GLboolean _BlendFuncPerBuffer;
 758    /** Are the blend equations currently different for each buffer/target? */
 759    GLboolean _BlendEquationPerBuffer;
 760    /*@}*/
 761
 762    /**
 763     * \name Logic op
 764     */
 765    /*@{*/
 766    GLenum LogicOp;                      /**< Logic operator */
 767    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 768    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 769    /*@}*/
 770
 771    GLboolean DitherFlag;                /**< Dither enable flag */
 772
 773    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 774    GLboolean _ClampFragmentColor; /** < with GL_FIXED_ONLY_ARB resolved */
 775    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 776    GLboolean _ClampReadColor;     /** < with GL_FIXED_ONLY_ARB resolved */
 777
 778    GLboolean sRGBEnabled;       /**< Framebuffer sRGB blending/updating requested */
 779 };
 780
 781
 782 /**
 783  * Current attribute group (GL_CURRENT_BIT).
 784  */
 785 struct gl_current_attrib
 786 {
 787    /**
 788     * \name Current vertex attributes.
 789     * \note Values are valid only after FLUSH_VERTICES has been called.
 790     * \note Index and Edgeflag current values are stored as floats in the
 791     * SIX and SEVEN attribute slots.
 792     */
 793    GLfloat Attrib[VERT_ATTRIB_MAX][4];  /**< Position, color, texcoords, etc */
 794
 795    /**
 796     * \name Current raster position attributes (always valid).
 797     * \note This set of attributes is very similar to the SWvertex struct.
 798     */
 799    /*@{*/
 800    GLfloat RasterPos[4];
 801    GLfloat RasterDistance;
 802    GLfloat RasterColor[4];
 803    GLfloat RasterSecondaryColor[4];
 804    GLfloat RasterTexCoords[MAX_TEXTURE_COORD_UNITS][4];
 805    GLboolean RasterPosValid;
 806    /*@}*/
 807 };
 808
 809
 810 /**
 811  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 812  */
 813 struct gl_depthbuffer_attrib
 814 {
 815    GLenum Func;                 /**< Function for depth buffer compare */
 816    GLclampd Clear;              /**< Value to clear depth buffer to */
 817    GLboolean Test;              /**< Depth buffering enabled flag */
 818    GLboolean Mask;              /**< Depth buffer writable? */
 819    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 820    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 821 };
 822
 823
 824 /**
 825  * Evaluator attribute group (GL_EVAL_BIT).
 826  */
 827 struct gl_eval_attrib
 828 {
 829    /**
 830     * \name Enable bits
 831     */
 832    /*@{*/
 833    GLboolean Map1Color4;
 834    GLboolean Map1Index;
 835    GLboolean Map1Normal;
 836    GLboolean Map1TextureCoord1;
 837    GLboolean Map1TextureCoord2;
 838    GLboolean Map1TextureCoord3;
 839    GLboolean Map1TextureCoord4;
 840    GLboolean Map1Vertex3;
 841    GLboolean Map1Vertex4;
 842    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 843    GLboolean Map2Color4;
 844    GLboolean Map2Index;
 845    GLboolean Map2Normal;
 846    GLboolean Map2TextureCoord1;
 847    GLboolean Map2TextureCoord2;
 848    GLboolean Map2TextureCoord3;
 849    GLboolean Map2TextureCoord4;
 850    GLboolean Map2Vertex3;
 851    GLboolean Map2Vertex4;
 852    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 853    GLboolean AutoNormal;
 854    /*@}*/
 855
 856    /**
 857     * \name Map Grid endpoints and divisions and calculated du values
 858     */
 859    /*@{*/
 860    GLint MapGrid1un;
 861    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 862    GLint MapGrid2un, MapGrid2vn;
 863    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 864    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 865    /*@}*/
 866 };
 867
 868
 869 /**
 870  * Fog attribute group (GL_FOG_BIT).
 871  */
 872 struct gl_fog_attrib
 873 {
 874    GLboolean Enabled;           /**< Fog enabled flag */
 875    GLfloat ColorUnclamped[4];            /**< Fog color */
 876    GLfloat Color[4];            /**< Fog color */
 877    GLfloat Density;             /**< Density >= 0.0 */
 878    GLfloat Start;               /**< Start distance in eye coords */
 879    GLfloat End;                 /**< End distance in eye coords */
 880    GLfloat Index;               /**< Fog index */
 881    GLenum Mode;                 /**< Fog mode */
 882    GLboolean ColorSumEnabled;
 883    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 884    GLfloat _Scale;              /**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
 885 };
 886
 887
 888 /**
 889  * \brief Layout qualifiers for gl_FragDepth.
 890  *
 891  * Extension AMD_conservative_depth allows gl_FragDepth to be redeclared with
 892  * a layout qualifier.
 893  *
 894  * \see enum ir_depth_layout
 895  */
 896 enum gl_frag_depth_layout {
 897     FRAG_DEPTH_LAYOUT_NONE, /**< No layout is specified. */
 898     FRAG_DEPTH_LAYOUT_ANY,
 899     FRAG_DEPTH_LAYOUT_GREATER,
 900     FRAG_DEPTH_LAYOUT_LESS,
 901     FRAG_DEPTH_LAYOUT_UNCHANGED
 902 };
 903
 904
 905 /**
 906  * Hint attribute group (GL_HINT_BIT).
 907  *
 908  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 909  */
 910 struct gl_hint_attrib
 911 {
 912    GLenum PerspectiveCorrection;
 913    GLenum PointSmooth;
 914    GLenum LineSmooth;
 915    GLenum PolygonSmooth;
 916    GLenum Fog;
 917    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 918    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 919    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 920    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 921 };
 922
 923 /**
 924  * Light state flags.
 925  */
 926 /*@{*/
 927 #define LIGHT_SPOT         0x1
 928 #define LIGHT_LOCAL_VIEWER 0x2
 929 #define LIGHT_POSITIONAL   0x4
 930 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 931 /*@}*/
 932
 933
 934 /**
 935  * Lighting attribute group (GL_LIGHT_BIT).
 936  */
 937 struct gl_light_attrib
 938 {
 939    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 940    struct gl_lightmodel Model;          /**< Lighting model */
 941
 942    /**
 943     * Must flush FLUSH_VERTICES before referencing:
 944     */
 945    /*@{*/
 946    struct gl_material Material;         /**< Includes front & back values */
 947    /*@}*/
 948
 949    GLboolean Enabled;                   /**< Lighting enabled flag */
 950    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 951    GLenum ProvokingVertex;              /**< GL_EXT_provoking_vertex */
 952    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 953    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 954    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 955    GLboolean ColorMaterialEnabled;
 956    GLenum ClampVertexColor;
 957    GLboolean _ClampVertexColor;
 958
 959    struct gl_light EnabledList;         /**< List sentinel */
 960
 961    /**
 962     * Derived state for optimizations:
 963     */
 964    /*@{*/
 965    GLboolean _NeedEyeCoords;
 966    GLboolean _NeedVertices;             /**< Use fast shader? */
 967    GLbitfield _Flags;                   /**< LIGHT_* flags, see above */
 968    GLfloat _BaseColor[2][3];
 969    /*@}*/
 970 };
 971
 972
 973 /**
 974  * Line attribute group (GL_LINE_BIT).
 975  */
 976 struct gl_line_attrib
 977 {
 978    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 979    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 980    GLushort StipplePattern;     /**< Stipple pattern */
 981    GLint StippleFactor;         /**< Stipple repeat factor */
 982    GLfloat Width;               /**< Line width */
 983 };
 984
 985
 986 /**
 987  * Display list attribute group (GL_LIST_BIT).
 988  */
 989 struct gl_list_attrib
 990 {
 991    GLuint ListBase;
 992 };
 993
 994
 995 /**
 996  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 997  */
 998 struct gl_multisample_attrib
 999 {
1000    GLboolean Enabled;
1001    GLboolean _Enabled;   /**< true if Enabled and multisample buffer */
1002    GLboolean SampleAlphaToCoverage;
1003    GLboolean SampleAlphaToOne;
1004    GLboolean SampleCoverage;
1005    GLfloat SampleCoverageValue;
1006    GLboolean SampleCoverageInvert;
1007 };
1008
1009
1010 /**
1011  * A pixelmap (see glPixelMap)
1012  */
1013 struct gl_pixelmap
1014 {
1015    GLint Size;
1016    GLfloat Map[MAX_PIXEL_MAP_TABLE];
1017    GLubyte Map8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
1018 };
1019
1020
1021 /**
1022  * Collection of all pixelmaps
1023  */
1024 struct gl_pixelmaps
1025 {
1026    struct gl_pixelmap RtoR;  /**< i.e. GL_PIXEL_MAP_R_TO_R */
1027    struct gl_pixelmap GtoG;
1028    struct gl_pixelmap BtoB;
1029    struct gl_pixelmap AtoA;
1030    struct gl_pixelmap ItoR;
1031    struct gl_pixelmap ItoG;
1032    struct gl_pixelmap ItoB;
1033    struct gl_pixelmap ItoA;
1034    struct gl_pixelmap ItoI;
1035    struct gl_pixelmap StoS;
1036 };
1037
1038
1039 /**
1040  * Pixel attribute group (GL_PIXEL_MODE_BIT).
1041  */
1042 struct gl_pixel_attrib
1043 {
1044    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
1045
1046    /*--- Begin Pixel Transfer State ---*/
1047    /* Fields are in the order in which they're applied... */
1048
1049    /** Scale & Bias (index shift, offset) */
1050    /*@{*/
1051    GLfloat RedBias, RedScale;
1052    GLfloat GreenBias, GreenScale;
1053    GLfloat BlueBias, BlueScale;
1054    GLfloat AlphaBias, AlphaScale;
1055    GLfloat DepthBias, DepthScale;
1056    GLint IndexShift, IndexOffset;
1057    /*@}*/
1058
1059    /* Pixel Maps */
1060    /* Note: actual pixel maps are not part of this attrib group */
1061    GLboolean MapColorFlag;
1062    GLboolean MapStencilFlag;
1063
1064    /*--- End Pixel Transfer State ---*/
1065
1066    /** glPixelZoom */
1067    GLfloat ZoomX, ZoomY;
1068 };
1069
1070
1071 /**
1072  * Point attribute group (GL_POINT_BIT).
1073  */
1074 struct gl_point_attrib
1075 {
1076    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1077    GLfloat Size;                /**< User-specified point size */
1078    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1079    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1080    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1081    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1082    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
1083    GLboolean CoordReplace[MAX_TEXTURE_COORD_UNITS]; /**< GL_ARB_point_sprite*/
1084    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1085    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1086 };
1087
1088
1089 /**
1090  * Polygon attribute group (GL_POLYGON_BIT).
1091  */
1092 struct gl_polygon_attrib
1093 {
1094    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1095    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1096    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1097    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1098    GLboolean CullFlag;          /**< Culling on/off flag */
1099    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1100    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1101    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1102    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1103    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1104    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1105    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1106    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1107 };
1108
1109
1110 /**
1111  * Scissor attributes (GL_SCISSOR_BIT).
1112  */
1113 struct gl_scissor_attrib
1114 {
1115    GLboolean Enabled;           /**< Scissor test enabled? */
1116    GLint X, Y;                  /**< Lower left corner of box */
1117    GLsizei Width, Height;       /**< Size of box */
1118 };
1119
1120
1121 /**
1122  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1123  *
1124  * Three sets of stencil data are tracked so that OpenGL 2.0,
1125  * GL_EXT_stencil_two_side, and GL_ATI_separate_stencil can all be supported
1126  * simultaneously.  In each of the stencil state arrays, element 0 corresponds
1127  * to GL_FRONT.  Element 1 corresponds to the OpenGL 2.0 /
1128  * GL_ATI_separate_stencil GL_BACK state.  Element 2 corresponds to the
1129  * GL_EXT_stencil_two_side GL_BACK state.
1130  *
1131  * The derived value \c _BackFace is either 1 or 2 depending on whether or
1132  * not GL_STENCIL_TEST_TWO_SIDE_EXT is enabled.
1133  *
1134  * The derived value \c _TestTwoSide is set when the front-face and back-face
1135  * stencil state are different.
1136  */
1137 struct gl_stencil_attrib
1138 {
1139    GLboolean Enabled;           /**< Enabled flag */
1140    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1141    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 2) */
1142    GLboolean _Enabled;          /**< Enabled and stencil buffer present */
1143    GLboolean _TestTwoSide;
1144    GLubyte _BackFace;           /**< Current back stencil state (1 or 2) */
1145    GLenum Function[3];          /**< Stencil function */
1146    GLenum FailFunc[3];          /**< Fail function */
1147    GLenum ZPassFunc[3];         /**< Depth buffer pass function */
1148    GLenum ZFailFunc[3];         /**< Depth buffer fail function */
1149    GLint Ref[3];                /**< Reference value */
1150    GLuint ValueMask[3];         /**< Value mask */
1151    GLuint WriteMask[3];         /**< Write mask */
1152    GLuint Clear;                /**< Clear value */
1153 };
1154
1155
1156 /**
1157  * An index for each type of texture object.  These correspond to the GL
1158  * texture target enums, such as GL_TEXTURE_2D, GL_TEXTURE_CUBE_MAP, etc.
1159  * Note: the order is from highest priority to lowest priority.
1160  */
1161 typedef enum
1162 {
1163    TEXTURE_BUFFER_INDEX,
1164    TEXTURE_2D_ARRAY_INDEX,
1165    TEXTURE_1D_ARRAY_INDEX,
1166    TEXTURE_CUBE_INDEX,
1167    TEXTURE_3D_INDEX,
1168    TEXTURE_RECT_INDEX,
1169    TEXTURE_2D_INDEX,
1170    TEXTURE_1D_INDEX,
1171    NUM_TEXTURE_TARGETS
1172 } gl_texture_index;
1173
1174
1175 /**
1176  * Bit flags for each type of texture object
1177  * Used for Texture.Unit[]._ReallyEnabled flags.
1178  */
1179 /*@{*/
1180 #define TEXTURE_BUFFER_BIT   (1 << TEXTURE_BUFFER_INDEX)
1181 #define TEXTURE_2D_ARRAY_BIT (1 << TEXTURE_2D_ARRAY_INDEX)
1182 #define TEXTURE_1D_ARRAY_BIT (1 << TEXTURE_1D_ARRAY_INDEX)
1183 #define TEXTURE_CUBE_BIT     (1 << TEXTURE_CUBE_INDEX)
1184 #define TEXTURE_3D_BIT       (1 << TEXTURE_3D_INDEX)
1185 #define TEXTURE_RECT_BIT     (1 << TEXTURE_RECT_INDEX)
1186 #define TEXTURE_2D_BIT       (1 << TEXTURE_2D_INDEX)
1187 #define TEXTURE_1D_BIT       (1 << TEXTURE_1D_INDEX)
1188 /*@}*/
1189
1190
1191 /**
1192  * TexGenEnabled flags.
1193  */
1194 /*@{*/
1195 #define S_BIT 1
1196 #define T_BIT 2
1197 #define R_BIT 4
1198 #define Q_BIT 8
1199 #define STR_BITS (S_BIT | T_BIT | R_BIT)
1200 /*@}*/
1201
1202
1203 /**
1204  * Bit flag versions of the corresponding GL_ constants.
1205  */
1206 /*@{*/
1207 #define TEXGEN_SPHERE_MAP        0x1
1208 #define TEXGEN_OBJ_LINEAR        0x2
1209 #define TEXGEN_EYE_LINEAR        0x4
1210 #define TEXGEN_REFLECTION_MAP_NV 0x8
1211 #define TEXGEN_NORMAL_MAP_NV     0x10
1212
1213 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1214                                   TEXGEN_REFLECTION_MAP_NV | \
1215                                   TEXGEN_NORMAL_MAP_NV)
1216 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1217                                   TEXGEN_REFLECTION_MAP_NV | \
1218                                   TEXGEN_NORMAL_MAP_NV     | \
1219                                   TEXGEN_EYE_LINEAR)
1220 /*@}*/
1221
1222
1223
1224 /** Tex-gen enabled for texture unit? */
1225 #define ENABLE_TEXGEN(unit) (1 << (unit))
1226
1227 /** Non-identity texture matrix for texture unit? */
1228 #define ENABLE_TEXMAT(unit) (1 << (unit))
1229
1230
1231 /**
1232  * Texture image state.  Describes the dimensions of a texture image,
1233  * the texel format and pointers to Texel Fetch functions.
1234  */
1235 struct gl_texture_image
1236 {
1237    GLint InternalFormat;        /**< Internal format as given by the user */
1238    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1239                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1240                                  *   GL_INTENSITY, GL_DEPTH_COMPONENT or
1241                                  *   GL_DEPTH_STENCIL_EXT only. Used for
1242                                  *   choosing TexEnv arithmetic.
1243                                  */
1244    gl_format TexFormat;         /**< The actual texture memory format */
1245
1246    GLuint Border;               /**< 0 or 1 */
1247    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1248    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1249    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1250    GLuint Width2;               /**< = Width - 2*Border */
1251    GLuint Height2;              /**< = Height - 2*Border */
1252    GLuint Depth2;               /**< = Depth - 2*Border */
1253    GLuint WidthLog2;            /**< = log2(Width2) */
1254    GLuint HeightLog2;           /**< = log2(Height2) */
1255    GLuint DepthLog2;            /**< = log2(Depth2) */
1256    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1257
1258    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1259    GLuint Level;                /**< Which mipmap level am I? */
1260    /** Cube map face: index into gl_texture_object::Image[] array */
1261    GLuint Face;
1262
1263    GLuint RowStride;            /**< Padded width in units of texels */
1264    GLuint *ImageOffsets;        /**< if 3D texture: array [Depth] of offsets to
1265                                      each 2D slice in 'Data', in texels */
1266    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1267
1268    /**
1269     * \name For device driver:
1270     */
1271    /*@{*/
1272    void *DriverData;            /**< Arbitrary device driver data */
1273    /*@}*/
1274 };
1275
1276
1277 /**
1278  * Indexes for cube map faces.
1279  */
1280 typedef enum
1281 {
1282    FACE_POS_X = 0,
1283    FACE_NEG_X = 1,
1284    FACE_POS_Y = 2,
1285    FACE_NEG_Y = 3,
1286    FACE_POS_Z = 4,
1287    FACE_NEG_Z = 5,
1288    MAX_FACES = 6
1289 } gl_face_index;
1290
1291
1292 /**
1293  * Sampler object state.  These objects are new with GL_ARB_sampler_objects
1294  * and OpenGL 3.3.  Legacy texture objects also contain a sampler object.
1295  */
1296 struct gl_sampler_object
1297 {
1298    GLuint Name;
1299    GLint RefCount;
1300
1301    GLenum WrapS;                /**< S-axis texture image wrap mode */
1302    GLenum WrapT;                /**< T-axis texture image wrap mode */
1303    GLenum WrapR;                /**< R-axis texture image wrap mode */
1304    GLenum MinFilter;            /**< minification filter */
1305    GLenum MagFilter;            /**< magnification filter */
1306    union gl_color_union BorderColor;  /**< Interpreted according to texture format */
1307    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1308    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1309    GLfloat LodBias;             /**< OpenGL 1.4 */
1310    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1311    GLenum CompareMode;          /**< GL_ARB_shadow */
1312    GLenum CompareFunc;          /**< GL_ARB_shadow */
1313    GLfloat CompareFailValue;    /**< GL_ARB_shadow_ambient */
1314    GLenum sRGBDecode;           /**< GL_DECODE_EXT or GL_SKIP_DECODE_EXT */
1315    GLboolean CubeMapSeamless;   /**< GL_AMD_seamless_cubemap_per_texture */
1316
1317    /* deprecated sampler state */
1318    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1319
1320    /** Is the texture object complete with respect to this sampler? */
1321    GLboolean _CompleteTexture;
1322 };
1323
1324
1325 /**
1326  * Texture object state.  Contains the array of mipmap images, border color,
1327  * wrap modes, filter modes, and shadow/texcompare state.
1328  */
1329 struct gl_texture_object
1330 {
1331    _glthread_Mutex Mutex;       /**< for thread safety */
1332    GLint RefCount;              /**< reference count */
1333    GLuint Name;                 /**< the user-visible texture object ID */
1334    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1335
1336    struct gl_sampler_object Sampler;
1337
1338    GLfloat Priority;            /**< in [0,1] */
1339    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1340    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1341    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1342    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1343    GLint CropRect[4];           /**< GL_OES_draw_texture */
1344    GLenum Swizzle[4];           /**< GL_EXT_texture_swizzle */
1345    GLuint _Swizzle;             /**< same as Swizzle, but SWIZZLE_* format */
1346    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1347    GLboolean _Complete;         /**< Is texture object complete? */
1348    GLboolean _RenderToTexture;  /**< Any rendering to this texture? */
1349    GLboolean Purgeable;         /**< Is the buffer purgeable under memory pressure? */
1350
1351    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1352    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1353
1354    /** GL_ARB_texture_buffer_object */
1355    struct gl_buffer_object *BufferObject;
1356    GLenum BufferObjectFormat;
1357
1358    /**
1359     * \name For device driver.
1360     * Note: instead of attaching driver data to this pointer, it's preferable
1361     * to instead use this struct as a base class for your own texture object
1362     * class.  Driver->NewTextureObject() can be used to implement the
1363     * allocation.
1364     */
1365    void *DriverData;    /**< Arbitrary device driver data */
1366 };
1367
1368
1369 /** Up to four combiner sources are possible with GL_NV_texture_env_combine4 */
1370 #define MAX_COMBINER_TERMS 4
1371
1372
1373 /**
1374  * Texture combine environment state.
1375  */
1376 struct gl_tex_env_combine_state
1377 {
1378    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1379    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1380    /** Source terms: GL_PRIMARY_COLOR, GL_TEXTURE, etc */
1381    GLenum SourceRGB[MAX_COMBINER_TERMS];
1382    GLenum SourceA[MAX_COMBINER_TERMS];
1383    /** Source operands: GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR, etc */
1384    GLenum OperandRGB[MAX_COMBINER_TERMS];
1385    GLenum OperandA[MAX_COMBINER_TERMS];
1386    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1387    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1388    GLuint _NumArgsRGB;   /**< Number of inputs used for the RGB combiner */
1389    GLuint _NumArgsA;     /**< Number of inputs used for the A combiner */
1390 };
1391
1392
1393 /**
1394  * Texture coord generation state.
1395  */
1396 struct gl_texgen
1397 {
1398    GLenum Mode;         /**< GL_EYE_LINEAR, GL_SPHERE_MAP, etc */
1399    GLbitfield _ModeBit; /**< TEXGEN_x bit corresponding to Mode */
1400    GLfloat ObjectPlane[4];
1401    GLfloat EyePlane[4];
1402 };
1403
1404
1405 /**
1406  * Texture unit state.  Contains enable flags, texture environment/function/
1407  * combiners, texgen state, and pointers to current texture objects.
1408  */
1409 struct gl_texture_unit
1410 {
1411    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1412    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1413
1414    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1415    GLclampf EnvColor[4];
1416    GLfloat EnvColorUnclamped[4];
1417
1418    struct gl_texgen GenS;
1419    struct gl_texgen GenT;
1420    struct gl_texgen GenR;
1421    struct gl_texgen GenQ;
1422    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1423    GLbitfield _GenFlags;        /**< Bitwise-OR of Gen[STRQ]._ModeBit */
1424
1425    GLfloat LodBias;             /**< for biasing mipmap levels */
1426    GLenum BumpTarget;
1427    GLfloat RotMatrix[4]; /* 2x2 matrix */
1428
1429    /** Current sampler object (GL_ARB_sampler_objects) */
1430    struct gl_sampler_object *Sampler;
1431
1432    /**
1433     * \name GL_EXT_texture_env_combine
1434     */
1435    struct gl_tex_env_combine_state Combine;
1436
1437    /**
1438     * Derived state based on \c EnvMode and the \c BaseFormat of the
1439     * currently enabled texture.
1440     */
1441    struct gl_tex_env_combine_state _EnvMode;
1442
1443    /**
1444     * Currently enabled combiner state.  This will point to either
1445     * \c Combine or \c _EnvMode.
1446     */
1447    struct gl_tex_env_combine_state *_CurrentCombine;
1448
1449    /** Current texture object pointers */
1450    struct gl_texture_object *CurrentTex[NUM_TEXTURE_TARGETS];
1451
1452    /** Points to highest priority, complete and enabled texture object */
1453    struct gl_texture_object *_Current;
1454 };
1455
1456
1457 /**
1458  * Texture attribute group (GL_TEXTURE_BIT).
1459  */
1460 struct gl_texture_attrib
1461 {
1462    GLuint CurrentUnit;   /**< GL_ACTIVE_TEXTURE */
1463    struct gl_texture_unit Unit[MAX_COMBINED_TEXTURE_IMAGE_UNITS];
1464
1465    struct gl_texture_object *ProxyTex[NUM_TEXTURE_TARGETS];
1466
1467    /** GL_ARB_texture_buffer_object */
1468    struct gl_buffer_object *BufferObject;
1469
1470    /** GL_ARB_seamless_cubemap */
1471    GLboolean CubeMapSeamless;
1472
1473    /** Texture units/samplers used by vertex or fragment texturing */
1474    GLbitfield _EnabledUnits;
1475
1476    /** Texture coord units/sets used for fragment texturing */
1477    GLbitfield _EnabledCoordUnits;
1478
1479    /** Texture coord units that have texgen enabled */
1480    GLbitfield _TexGenEnabled;
1481
1482    /** Texture coord units that have non-identity matrices */
1483    GLbitfield _TexMatEnabled;
1484
1485    /** Bitwise-OR of all Texture.Unit[i]._GenFlags */
1486    GLbitfield _GenFlags;
1487 };
1488
1489
1490 /**
1491  * Transformation attribute group (GL_TRANSFORM_BIT).
1492  */
1493 struct gl_transform_attrib
1494 {
1495    GLenum MatrixMode;                           /**< Matrix mode */
1496    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1497    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1498    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1499    GLboolean Normalize;                         /**< Normalize all normals? */
1500    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1501    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1502    GLboolean DepthClamp;                        /**< GL_ARB_depth_clamp */
1503
1504    GLfloat CullEyePos[4];
1505    GLfloat CullObjPos[4];
1506 };
1507
1508
1509 /**
1510  * Viewport attribute group (GL_VIEWPORT_BIT).
1511  */
1512 struct gl_viewport_attrib
1513 {
1514    GLint X, Y;                  /**< position */
1515    GLsizei Width, Height;       /**< size */
1516    GLfloat Near, Far;           /**< Depth buffer range */
1517    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1518 };
1519
1520
1521 /**
1522  * GL_ARB_vertex/pixel_buffer_object buffer object
1523  */
1524 struct gl_buffer_object
1525 {
1526    _glthread_Mutex Mutex;
1527    GLint RefCount;
1528    GLuint Name;
1529    GLenum Usage;        /**< GL_STREAM_DRAW_ARB, GL_STREAM_READ_ARB, etc. */
1530    GLsizeiptrARB Size;  /**< Size of buffer storage in bytes */
1531    GLubyte *Data;       /**< Location of storage either in RAM or VRAM. */
1532    /** Fields describing a mapped buffer */
1533    /*@{*/
1534    GLbitfield AccessFlags; /**< Mask of GL_MAP_x_BIT flags */
1535    GLvoid *Pointer;     /**< User-space address of mapping */
1536    GLintptr Offset;     /**< Mapped offset */
1537    GLsizeiptr Length;   /**< Mapped length */
1538    /*@}*/
1539    GLboolean Written;   /**< Ever written to? (for debugging) */
1540    GLboolean Purgeable; /**< Is the buffer purgeable under memory pressure? */
1541 };
1542
1543
1544 /**
1545  * Client pixel packing/unpacking attributes
1546  */
1547 struct gl_pixelstore_attrib
1548 {
1549    GLint Alignment;
1550    GLint RowLength;
1551    GLint SkipPixels;
1552    GLint SkipRows;
1553    GLint ImageHeight;
1554    GLint SkipImages;
1555    GLboolean SwapBytes;
1556    GLboolean LsbFirst;
1557    GLboolean Invert;        /**< GL_MESA_pack_invert */
1558    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1559 };
1560
1561
1562 /**
1563  * Client vertex array attributes
1564  */
1565 struct gl_client_array
1566 {
1567    GLint Size;                  /**< components per element (1,2,3,4) */
1568    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1569    GLenum Format;               /**< default: GL_RGBA, but may be GL_BGRA */
1570    GLsizei Stride;              /**< user-specified stride */
1571    GLsizei StrideB;             /**< actual stride in bytes */
1572    const GLubyte *Ptr;          /**< Points to array data */
1573    GLboolean Enabled;           /**< Enabled flag is a boolean */
1574    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1575    GLboolean Integer;           /**< Integer-valued? */
1576    GLuint InstanceDivisor;      /**< GL_ARB_instanced_arrays */
1577    GLuint _ElementSize;         /**< size of each element in bytes */
1578
1579    struct gl_buffer_object *BufferObj;/**< GL_ARB_vertex_buffer_object */
1580    GLuint _MaxElement;          /**< max element index into array buffer + 1 */
1581 };
1582
1583
1584 /**
1585  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1586  * extension, but a nice encapsulation in any case.
1587  */
1588 struct gl_array_object
1589 {
1590    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1591    GLuint Name;
1592
1593    GLint RefCount;
1594    _glthread_Mutex Mutex;
1595    GLboolean VBOonly;  /**< require all arrays to live in VBOs? */
1596
1597    /** Conventional vertex arrays */
1598    /*@{*/
1599    struct gl_client_array Vertex;
1600    struct gl_client_array Weight;
1601    struct gl_client_array Normal;
1602    struct gl_client_array Color;
1603    struct gl_client_array SecondaryColor;
1604    struct gl_client_array FogCoord;
1605    struct gl_client_array Index;
1606    struct gl_client_array EdgeFlag;
1607    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1608    struct gl_client_array PointSize;
1609    /*@}*/
1610
1611    /**
1612     * Generic arrays for vertex programs/shaders.
1613     * For NV vertex programs, these attributes alias and take priority
1614     * over the conventional attribs above.  For ARB vertex programs and
1615     * GLSL vertex shaders, these attributes are separate.
1616     */
1617    struct gl_client_array VertexAttrib[MAX_VERTEX_GENERIC_ATTRIBS];
1618
1619    /** Mask of _NEW_ARRAY_* values indicating which arrays are enabled */
1620    GLbitfield _Enabled;
1621
1622    /**
1623     * Min of all enabled arrays' _MaxElement.  When arrays reside inside VBOs
1624     * we can determine the max legal (in bounds) glDrawElements array index.
1625     */
1626    GLuint _MaxElement;
1627 };
1628
1629
1630 /**
1631  * Vertex array state
1632  */
1633 struct gl_array_attrib
1634 {
1635    /** Currently bound array object. See _mesa_BindVertexArrayAPPLE() */
1636    struct gl_array_object *ArrayObj;
1637
1638    /** The default vertex array object */
1639    struct gl_array_object *DefaultArrayObj;
1640
1641    /** Array objects (GL_ARB/APPLE_vertex_array_object) */
1642    struct _mesa_HashTable *Objects;
1643
1644    GLint ActiveTexture;         /**< Client Active Texture */
1645    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1646    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1647
1648    /** GL 3.1 (slightly different from GL_NV_primitive_restart) */
1649    GLboolean PrimitiveRestart;
1650    GLuint RestartIndex;
1651
1652    GLbitfield NewState;         /**< mask of _NEW_ARRAY_* values */
1653    GLboolean RebindArrays; /**< whether the VBO module should rebind arrays */
1654
1655    /* GL_ARB_vertex_buffer_object */
1656    struct gl_buffer_object *ArrayBufferObj;
1657    struct gl_buffer_object *ElementArrayBufferObj;
1658 };
1659
1660
1661 /**
1662  * Feedback buffer state
1663  */
1664 struct gl_feedback
1665 {
1666    GLenum Type;
1667    GLbitfield _Mask;    /**< FB_* bits */
1668    GLfloat *Buffer;
1669    GLuint BufferSize;
1670    GLuint Count;
1671 };
1672
1673
1674 /**
1675  * Selection buffer state
1676  */
1677 struct gl_selection
1678 {
1679    GLuint *Buffer;      /**< selection buffer */
1680    GLuint BufferSize;   /**< size of the selection buffer */
1681    GLuint BufferCount;  /**< number of values in the selection buffer */
1682    GLuint Hits;         /**< number of records in the selection buffer */
1683    GLuint NameStackDepth; /**< name stack depth */
1684    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1685    GLboolean HitFlag;   /**< hit flag */
1686    GLfloat HitMinZ;     /**< minimum hit depth */
1687    GLfloat HitMaxZ;     /**< maximum hit depth */
1688 };
1689
1690
1691 /**
1692  * 1-D Evaluator control points
1693  */
1694 struct gl_1d_map
1695 {
1696    GLuint Order;        /**< Number of control points */
1697    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1698    GLfloat *Points;     /**< Points to contiguous control points */
1699 };
1700
1701
1702 /**
1703  * 2-D Evaluator control points
1704  */
1705 struct gl_2d_map
1706 {
1707    GLuint Uorder;               /**< Number of control points in U dimension */
1708    GLuint Vorder;               /**< Number of control points in V dimension */
1709    GLfloat u1, u2, du;
1710    GLfloat v1, v2, dv;
1711    GLfloat *Points;             /**< Points to contiguous control points */
1712 };
1713
1714
1715 /**
1716  * All evaluator control point state
1717  */
1718 struct gl_evaluators
1719 {
1720    /**
1721     * \name 1-D maps
1722     */
1723    /*@{*/
1724    struct gl_1d_map Map1Vertex3;
1725    struct gl_1d_map Map1Vertex4;
1726    struct gl_1d_map Map1Index;
1727    struct gl_1d_map Map1Color4;
1728    struct gl_1d_map Map1Normal;
1729    struct gl_1d_map Map1Texture1;
1730    struct gl_1d_map Map1Texture2;
1731    struct gl_1d_map Map1Texture3;
1732    struct gl_1d_map Map1Texture4;
1733    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1734    /*@}*/
1735
1736    /**
1737     * \name 2-D maps
1738     */
1739    /*@{*/
1740    struct gl_2d_map Map2Vertex3;
1741    struct gl_2d_map Map2Vertex4;
1742    struct gl_2d_map Map2Index;
1743    struct gl_2d_map Map2Color4;
1744    struct gl_2d_map Map2Normal;
1745    struct gl_2d_map Map2Texture1;
1746    struct gl_2d_map Map2Texture2;
1747    struct gl_2d_map Map2Texture3;
1748    struct gl_2d_map Map2Texture4;
1749    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1750    /*@}*/
1751 };
1752
1753
1754 /**
1755  * Names of the various vertex/fragment program register files, etc.
1756  *
1757  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1758  * All values should fit in a 4-bit field.
1759  *
1760  * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
1761  * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
1762  * be "uniform" variables since they can only be set outside glBegin/End.
1763  * They're also all stored in the same Parameters array.
1764  */
1765 typedef enum
1766 {
1767    PROGRAM_TEMPORARY,   /**< machine->Temporary[] */
1768    PROGRAM_INPUT,       /**< machine->Inputs[] */
1769    PROGRAM_OUTPUT,      /**< machine->Outputs[] */
1770    PROGRAM_VARYING,     /**< machine->Inputs[]/Outputs[] */
1771    PROGRAM_LOCAL_PARAM, /**< gl_program->LocalParams[] */
1772    PROGRAM_ENV_PARAM,   /**< gl_program->Parameters[] */
1773    PROGRAM_STATE_VAR,   /**< gl_program->Parameters[] */
1774    PROGRAM_NAMED_PARAM, /**< gl_program->Parameters[] */
1775    PROGRAM_CONSTANT,    /**< gl_program->Parameters[] */
1776    PROGRAM_UNIFORM,     /**< gl_program->Parameters[] */
1777    PROGRAM_WRITE_ONLY,  /**< A dummy, write-only register */
1778    PROGRAM_ADDRESS,     /**< machine->AddressReg */
1779    PROGRAM_SAMPLER,     /**< for shader samplers, compile-time only */
1780    PROGRAM_SYSTEM_VALUE,/**< InstanceId, PrimitiveID, etc. */
1781    PROGRAM_UNDEFINED,   /**< Invalid/TBD value */
1782    PROGRAM_FILE_MAX
1783 } gl_register_file;
1784
1785
1786 /**
1787  * If the register file is PROGRAM_SYSTEM_VALUE, the register index will be
1788  * one of these values.
1789  */
1790 typedef enum
1791 {
1792    SYSTEM_VALUE_FRONT_FACE,  /**< Fragment shader only (not done yet) */
1793    SYSTEM_VALUE_INSTANCE_ID, /**< Vertex shader only */
1794    SYSTEM_VALUE_MAX          /**< Number of values */
1795 } gl_system_value;
1796
1797
1798 /** Vertex and fragment instructions */
1799 struct prog_instruction;
1800 struct gl_program_parameter_list;
1801 struct gl_uniform_list;
1802
1803
1804 /**
1805  * Base class for any kind of program object
1806  */
1807 struct gl_program
1808 {
1809    GLuint Id;
1810    GLubyte *String;  /**< Null-terminated program text */
1811    GLint RefCount;
1812    GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
1813    GLenum Format;    /**< String encoding format */
1814    GLboolean Resident;
1815
1816    struct prog_instruction *Instructions;
1817
1818    GLbitfield InputsRead;     /**< Bitmask of which input regs are read */
1819    GLbitfield64 OutputsWritten; /**< Bitmask of which output regs are written */
1820    GLbitfield SystemValuesRead;   /**< Bitmask of SYSTEM_VALUE_x inputs used */
1821    GLbitfield InputFlags[MAX_PROGRAM_INPUTS];   /**< PROG_PARAM_BIT_x flags */
1822    GLbitfield OutputFlags[MAX_PROGRAM_OUTPUTS]; /**< PROG_PARAM_BIT_x flags */
1823    GLbitfield TexturesUsed[MAX_COMBINED_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1824    GLbitfield SamplersUsed;   /**< Bitfield of which samplers are used */
1825    GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */
1826
1827
1828    /** Named parameters, constants, etc. from program text */
1829    struct gl_program_parameter_list *Parameters;
1830    /** Numbered local parameters */
1831    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1832
1833    /** Vertex/fragment shader varying vars */
1834    struct gl_program_parameter_list *Varying;
1835    /** Vertex program user-defined attributes */
1836    struct gl_program_parameter_list *Attributes;
1837
1838    /** Map from sampler unit to texture unit (set by glUniform1i()) */
1839    GLubyte SamplerUnits[MAX_SAMPLERS];
1840    /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
1841    gl_texture_index SamplerTargets[MAX_SAMPLERS];
1842
1843    /** Bitmask of which register files are read/written with indirect
1844     * addressing.  Mask of (1 << PROGRAM_x) bits.
1845     */
1846    GLbitfield IndirectRegisterFiles;
1847
1848    /** Logical counts */
1849    /*@{*/
1850    GLuint NumInstructions;
1851    GLuint NumTemporaries;
1852    GLuint NumParameters;
1853    GLuint NumAttributes;
1854    GLuint NumAddressRegs;
1855    GLuint NumAluInstructions;
1856    GLuint NumTexInstructions;
1857    GLuint NumTexIndirections;
1858    /*@}*/
1859    /** Native, actual h/w counts */
1860    /*@{*/
1861    GLuint NumNativeInstructions;
1862    GLuint NumNativeTemporaries;
1863    GLuint NumNativeParameters;
1864    GLuint NumNativeAttributes;
1865    GLuint NumNativeAddressRegs;
1866    GLuint NumNativeAluInstructions;
1867    GLuint NumNativeTexInstructions;
1868    GLuint NumNativeTexIndirections;
1869    /*@}*/
1870 };
1871
1872
1873 /** Vertex program object */
1874 struct gl_vertex_program
1875 {
1876    struct gl_program Base;   /**< base class */
1877    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1878    GLboolean IsPositionInvariant;
1879    GLboolean UsesClipDistance;
1880 };
1881
1882
1883 /** Geometry program object */
1884 struct gl_geometry_program
1885 {
1886    struct gl_program Base;   /**< base class */
1887
1888    GLint VerticesOut;
1889    GLenum InputType;  /**< GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_ARB,
1890                            GL_TRIANGLES, or GL_TRIANGLES_ADJACENCY_ARB */
1891    GLenum OutputType; /**< GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP */
1892 };
1893
1894
1895 /** Fragment program object */
1896 struct gl_fragment_program
1897 {
1898    struct gl_program Base;   /**< base class */
1899    GLboolean UsesKill;          /**< shader uses KIL instruction */
1900    GLboolean OriginUpperLeft;
1901    GLboolean PixelCenterInteger;
1902    enum gl_frag_depth_layout FragDepthLayout;
1903 };
1904
1905
1906 /**
1907  * State common to vertex and fragment programs.
1908  */
1909 struct gl_program_state
1910 {
1911    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1912    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1913 };
1914
1915
1916 /**
1917  * Context state for vertex programs.
1918  */
1919 struct gl_vertex_program_state
1920 {
1921    GLboolean Enabled;            /**< User-set GL_VERTEX_PROGRAM_ARB/NV flag */
1922    GLboolean _Enabled;           /**< Enabled and _valid_ user program? */
1923    GLboolean PointSizeEnabled;   /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1924    GLboolean TwoSideEnabled;     /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1925    /** Computed two sided lighting for fixed function/programs. */
1926    GLboolean _TwoSideEnabled;
1927    struct gl_vertex_program *Current;  /**< User-bound vertex program */
1928
1929    /** Currently enabled and valid vertex program (including internal
1930     * programs, user-defined vertex programs and GLSL vertex shaders).
1931     * This is the program we must use when rendering.
1932     */
1933    struct gl_vertex_program *_Current;
1934
1935    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1936
1937    /* For GL_NV_vertex_program only: */
1938    GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
1939    GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];
1940
1941    /** Should fixed-function T&L be implemented with a vertex prog? */
1942    GLboolean _MaintainTnlProgram;
1943
1944    /** Program to emulate fixed-function T&L (see above) */
1945    struct gl_vertex_program *_TnlProgram;
1946
1947    /** Cache of fixed-function programs */
1948    struct gl_program_cache *Cache;
1949
1950    GLboolean _Overriden;
1951 };
1952
1953
1954 /**
1955  * Context state for geometry programs.
1956  */
1957 struct gl_geometry_program_state
1958 {
1959    GLboolean Enabled;               /**< GL_ARB_GEOMETRY_SHADER4 */
1960    GLboolean _Enabled;              /**< Enabled and valid program? */
1961    struct gl_geometry_program *Current;  /**< user-bound geometry program */
1962
1963    /** Currently enabled and valid program (including internal programs
1964     * and compiled shader programs).
1965     */
1966    struct gl_geometry_program *_Current;
1967
1968    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1969
1970    /** Cache of fixed-function programs */
1971    struct gl_program_cache *Cache;
1972 };
1973
1974 /**
1975  * Context state for fragment programs.
1976  */
1977 struct gl_fragment_program_state
1978 {
1979    GLboolean Enabled;     /**< User-set fragment program enable flag */
1980    GLboolean _Enabled;    /**< Enabled and _valid_ user program? */
1981    struct gl_fragment_program *Current;  /**< User-bound fragment program */
1982
1983    /** Currently enabled and valid fragment program (including internal
1984     * programs, user-defined fragment programs and GLSL fragment shaders).
1985     * This is the program we must use when rendering.
1986     */
1987    struct gl_fragment_program *_Current;
1988
1989    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1990
1991    /** Should fixed-function texturing be implemented with a fragment prog? */
1992    GLboolean _MaintainTexEnvProgram;
1993
1994    /** Program to emulate fixed-function texture env/combine (see above) */
1995    struct gl_fragment_program *_TexEnvProgram;
1996
1997    /** Cache of fixed-function programs */
1998    struct gl_program_cache *Cache;
1999 };
2000
2001
2002 /**
2003  * ATI_fragment_shader runtime state
2004  */
2005 #define ATI_FS_INPUT_PRIMARY 0
2006 #define ATI_FS_INPUT_SECONDARY 1
2007
2008 struct atifs_instruction;
2009 struct atifs_setupinst;
2010
2011 /**
2012  * ATI fragment shader
2013  */
2014 struct ati_fragment_shader
2015 {
2016    GLuint Id;
2017    GLint RefCount;
2018    struct atifs_instruction *Instructions[2];
2019    struct atifs_setupinst *SetupInst[2];
2020    GLfloat Constants[8][4];
2021    GLbitfield LocalConstDef;  /**< Indicates which constants have been set */
2022    GLubyte numArithInstr[2];
2023    GLubyte regsAssigned[2];
2024    GLubyte NumPasses;         /**< 1 or 2 */
2025    GLubyte cur_pass;
2026    GLubyte last_optype;
2027    GLboolean interpinp1;
2028    GLboolean isValid;
2029    GLuint swizzlerq;
2030 };
2031
2032 /**
2033  * Context state for GL_ATI_fragment_shader
2034  */
2035 struct gl_ati_fragment_shader_state
2036 {
2037    GLboolean Enabled;
2038    GLboolean _Enabled;                  /**< enabled and valid shader? */
2039    GLboolean Compiling;
2040    GLfloat GlobalConstants[8][4];
2041    struct ati_fragment_shader *Current;
2042 };
2043
2044
2045 /**
2046  * Occlusion/timer query object.
2047  */
2048 struct gl_query_object
2049 {
2050    GLenum Target;      /**< The query target, when active */
2051    GLuint Id;          /**< hash table ID/name */
2052    GLuint64EXT Result; /**< the counter */
2053    GLboolean Active;   /**< inside Begin/EndQuery */
2054    GLboolean Ready;    /**< result is ready? */
2055 };
2056
2057
2058 /**
2059  * Context state for query objects.
2060  */
2061 struct gl_query_state
2062 {
2063    struct _mesa_HashTable *QueryObjects;
2064    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2065    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2066
2067    /** GL_NV_conditional_render */
2068    struct gl_query_object *CondRenderQuery;
2069
2070    /** GL_EXT_transform_feedback */
2071    struct gl_query_object *PrimitivesGenerated;
2072    struct gl_query_object *PrimitivesWritten;
2073
2074    /** GL_ARB_timer_query */
2075    struct gl_query_object *TimeElapsed;
2076
2077    GLenum CondRenderMode;
2078 };
2079
2080
2081 /** Sync object state */
2082 struct gl_sync_object {
2083    struct simple_node link;
2084    GLenum Type;               /**< GL_SYNC_FENCE */
2085    GLuint Name;               /**< Fence name */
2086    GLint RefCount;            /**< Reference count */
2087    GLboolean DeletePending;   /**< Object was deleted while there were still
2088                                * live references (e.g., sync not yet finished)
2089                                */
2090    GLenum SyncCondition;
2091    GLbitfield Flags;          /**< Flags passed to glFenceSync */
2092    GLuint StatusFlag:1;       /**< Has the sync object been signaled? */
2093 };
2094
2095
2096 /** Set by #pragma directives */
2097 struct gl_sl_pragmas
2098 {
2099    GLboolean IgnoreOptimize;  /**< ignore #pragma optimize(on/off) ? */
2100    GLboolean IgnoreDebug;     /**< ignore #pragma debug(on/off) ? */
2101    GLboolean Optimize;  /**< defaults on */
2102    GLboolean Debug;     /**< defaults off */
2103 };
2104
2105
2106 /**
2107  * A GLSL vertex or fragment shader object.
2108  */
2109 struct gl_shader
2110 {
2111    GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER || GL_GEOMETRY_SHADER_ARB (first field!) */
2112    GLuint Name;  /**< AKA the handle */
2113    GLint RefCount;  /**< Reference count */
2114    GLboolean DeletePending;
2115    GLboolean CompileStatus;
2116    const GLchar *Source;  /**< Source code string */
2117    GLuint SourceChecksum;       /**< for debug/logging purposes */
2118    struct gl_program *Program;  /**< Post-compile assembly code */
2119    GLchar *InfoLog;
2120    struct gl_sl_pragmas Pragmas;
2121
2122    unsigned Version;       /**< GLSL version used for linking */
2123
2124    struct exec_list *ir;
2125    struct glsl_symbol_table *symbols;
2126
2127    /** Shaders containing built-in functions that are used for linking. */
2128    struct gl_shader *builtins_to_link[16];
2129    unsigned num_builtins_to_link;
2130 };
2131
2132
2133 /**
2134  * A GLSL program object.
2135  * Basically a linked collection of vertex and fragment shaders.
2136  */
2137 struct gl_shader_program
2138 {
2139    GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
2140    GLuint Name;  /**< aka handle or ID */
2141    GLint RefCount;  /**< Reference count */
2142    GLboolean DeletePending;
2143
2144    GLuint NumShaders;          /**< number of attached shaders */
2145    struct gl_shader **Shaders; /**< List of attached the shaders */
2146
2147    /** User-defined attribute bindings (glBindAttribLocation) */
2148    struct gl_program_parameter_list *Attributes;
2149
2150    /** Transform feedback varyings */
2151    struct {
2152       GLenum BufferMode;
2153       GLuint NumVarying;
2154       GLchar **VaryingNames;  /**< Array [NumVarying] of char * */
2155    } TransformFeedback;
2156
2157    /** Geometry shader state - copied into gl_geometry_program at link time */
2158    struct {
2159       GLint VerticesOut;
2160       GLenum InputType;  /**< GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_ARB,
2161                               GL_TRIANGLES, or GL_TRIANGLES_ADJACENCY_ARB */
2162       GLenum OutputType; /**< GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP */
2163    } Geom;
2164
2165    /** Vertex shader state - copied into gl_vertex_program at link time */
2166    struct {
2167       GLboolean UsesClipDistance; /**< True if gl_ClipDistance is written to. */
2168    } Vert;
2169
2170    /* post-link info: */
2171    struct gl_vertex_program *VertexProgram;     /**< Linked vertex program */
2172    struct gl_fragment_program *FragmentProgram; /**< Linked fragment prog */
2173    struct gl_geometry_program *GeometryProgram; /**< Linked geometry prog */
2174    struct gl_uniform_list *Uniforms;
2175    struct gl_program_parameter_list *Varying;
2176    GLboolean LinkStatus;   /**< GL_LINK_STATUS */
2177    GLboolean Validated;
2178    GLboolean _Used;        /**< Ever used for drawing? */
2179    GLchar *InfoLog;
2180
2181    unsigned Version;       /**< GLSL version used for linking */
2182
2183    /**
2184     * Per-stage shaders resulting from the first stage of linking.
2185     *
2186     * Set of linked shaders for this program.  The array is accessed using the
2187     * \c MESA_SHADER_* defines.  Entries for non-existent stages will be
2188     * \c NULL.
2189     */
2190    struct gl_shader *_LinkedShaders[MESA_SHADER_TYPES];
2191 };
2192
2193
2194 #define GLSL_DUMP      0x1  /**< Dump shaders to stdout */
2195 #define GLSL_LOG       0x2  /**< Write shaders to files */
2196 #define GLSL_OPT       0x4  /**< Force optimizations (override pragmas) */
2197 #define GLSL_NO_OPT    0x8  /**< Force no optimizations (override pragmas) */
2198 #define GLSL_UNIFORMS 0x10  /**< Print glUniform calls */
2199 #define GLSL_NOP_VERT 0x20  /**< Force no-op vertex shaders */
2200 #define GLSL_NOP_FRAG 0x40  /**< Force no-op fragment shaders */
2201 #define GLSL_USE_PROG 0x80  /**< Log glUseProgram calls */
2202
2203
2204 /**
2205  * Context state for GLSL vertex/fragment shaders.
2206  */
2207 struct gl_shader_state
2208 {
2209    /**
2210     * Programs used for rendering
2211     *
2212     * There is a separate program set for each shader stage.  If
2213     * GL_EXT_separate_shader_objects is not supported, each of these must point
2214     * to \c NULL or to the same program.
2215     */
2216    struct gl_shader_program *CurrentVertexProgram;
2217    struct gl_shader_program *CurrentGeometryProgram;
2218    struct gl_shader_program *CurrentFragmentProgram;
2219
2220    /**
2221     * Program used by glUniform calls.
2222     *
2223     * Explicitly set by \c glUseProgram and \c glActiveProgramEXT.
2224     */
2225    struct gl_shader_program *ActiveProgram;
2226
2227    GLbitfield Flags;                    /**< Mask of GLSL_x flags */
2228 };
2229
2230 /**
2231  * Compiler options for a single GLSL shaders type
2232  */
2233 struct gl_shader_compiler_options
2234 {
2235    /** Driver-selectable options: */
2236    GLboolean EmitCondCodes;             /**< Use condition codes? */
2237    GLboolean EmitNVTempInitialization;  /**< 0-fill NV temp registers */
2238    GLboolean EmitNoLoops;
2239    GLboolean EmitNoFunctions;
2240    GLboolean EmitNoCont;                  /**< Emit CONT opcode? */
2241    GLboolean EmitNoMainReturn;            /**< Emit CONT/RET opcodes? */
2242    GLboolean EmitNoNoise;                 /**< Emit NOISE opcodes? */
2243    GLboolean EmitNoPow;                   /**< Emit POW opcodes? */
2244    GLboolean LowerClipDistance; /**< Lower gl_ClipDistance from float[8] to vec4[2]? */
2245
2246    /**
2247     * \name Forms of indirect addressing the driver cannot do.
2248     */
2249    /*@{*/
2250    GLboolean EmitNoIndirectInput;   /**< No indirect addressing of inputs */
2251    GLboolean EmitNoIndirectOutput;  /**< No indirect addressing of outputs */
2252    GLboolean EmitNoIndirectTemp;    /**< No indirect addressing of temps */
2253    GLboolean EmitNoIndirectUniform; /**< No indirect addressing of constants */
2254    /*@}*/
2255
2256    GLuint MaxIfDepth;               /**< Maximum nested IF blocks */
2257    GLuint MaxUnrollIterations;
2258
2259    struct gl_sl_pragmas DefaultPragmas; /**< Default #pragma settings */
2260 };
2261
2262 /**
2263  * Transform feedback object state
2264  */
2265 struct gl_transform_feedback_object
2266 {
2267    GLuint Name;  /**< AKA the object ID */
2268    GLint RefCount;
2269    GLboolean Active;  /**< Is transform feedback enabled? */
2270    GLboolean Paused;  /**< Is transform feedback paused? */
2271
2272    /** The feedback buffers */
2273    GLuint BufferNames[MAX_FEEDBACK_ATTRIBS];
2274    struct gl_buffer_object *Buffers[MAX_FEEDBACK_ATTRIBS];
2275
2276    /** Start of feedback data in dest buffer */
2277    GLintptr Offset[MAX_FEEDBACK_ATTRIBS];
2278    /** Max data to put into dest buffer (in bytes) */
2279    GLsizeiptr Size[MAX_FEEDBACK_ATTRIBS];
2280 };
2281
2282
2283 /**
2284  * Context state for transform feedback.
2285  */
2286 struct gl_transform_feedback
2287 {
2288    GLenum Mode;       /**< GL_POINTS, GL_LINES or GL_TRIANGLES */
2289
2290    GLboolean RasterDiscard;  /**< GL_RASTERIZER_DISCARD */
2291
2292    /** The general binding point (GL_TRANSFORM_FEEDBACK_BUFFER) */
2293    struct gl_buffer_object *CurrentBuffer;
2294
2295    /** The table of all transform feedback objects */
2296    struct _mesa_HashTable *Objects;
2297
2298    /** The current xform-fb object (GL_TRANSFORM_FEEDBACK_BINDING) */
2299    struct gl_transform_feedback_object *CurrentObject;
2300
2301    /** The default xform-fb object (Name==0) */
2302    struct gl_transform_feedback_object *DefaultObject;
2303 };
2304
2305
2306
2307 /**
2308  * State which can be shared by multiple contexts:
2309  */
2310 struct gl_shared_state
2311 {
2312    _glthread_Mutex Mutex;                  /**< for thread safety */
2313    GLint RefCount;                         /**< Reference count */
2314    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2315    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2316
2317    /** Default texture objects (shared by all texture units) */
2318    struct gl_texture_object *DefaultTex[NUM_TEXTURE_TARGETS];
2319
2320    /** Fallback texture used when a bound texture is incomplete */
2321    struct gl_texture_object *FallbackTex;
2322
2323    /**
2324     * \name Thread safety and statechange notification for texture
2325     * objects.
2326     *
2327     * \todo Improve the granularity of locking.
2328     */
2329    /*@{*/
2330    _glthread_Mutex TexMutex;            /**< texobj thread safety */
2331    GLuint TextureStateStamp;            /**< state notification for shared tex */
2332    /*@}*/
2333
2334    /** Default buffer object for vertex arrays that aren't in VBOs */
2335    struct gl_buffer_object *NullBufferObj;
2336
2337    /**
2338     * \name Vertex/geometry/fragment programs
2339     */
2340    /*@{*/
2341    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2342    struct gl_vertex_program *DefaultVertexProgram;
2343    struct gl_fragment_program *DefaultFragmentProgram;
2344    struct gl_geometry_program *DefaultGeometryProgram;
2345    /*@}*/
2346
2347    /* GL_ATI_fragment_shader */
2348    struct _mesa_HashTable *ATIShaders;
2349    struct ati_fragment_shader *DefaultFragmentShader;
2350
2351    struct _mesa_HashTable *BufferObjects;
2352
2353    /** Table of both gl_shader and gl_shader_program objects */
2354    struct _mesa_HashTable *ShaderObjects;
2355
2356    /* GL_EXT_framebuffer_object */
2357    struct _mesa_HashTable *RenderBuffers;
2358    struct _mesa_HashTable *FrameBuffers;
2359
2360    /* GL_ARB_sync */
2361    struct simple_node SyncObjects;
2362
2363    /** GL_ARB_sampler_objects */
2364    struct _mesa_HashTable *SamplerObjects;
2365
2366    void *DriverData;  /**< Device driver shared state */
2367 };
2368
2369
2370
2371
2372 /**
2373  * A renderbuffer stores colors or depth values or stencil values.
2374  * A framebuffer object will have a collection of these.
2375  * Data are read/written to the buffer with a handful of Get/Put functions.
2376  *
2377  * Instances of this object are allocated with the Driver's NewRenderbuffer
2378  * hook.  Drivers will likely wrap this class inside a driver-specific
2379  * class to simulate inheritance.
2380  */
2381 struct gl_renderbuffer
2382 {
2383    _glthread_Mutex Mutex;                  /**< for thread safety */
2384    GLuint ClassID;        /**< Useful for drivers */
2385    GLuint Name;
2386    GLint RefCount;
2387    GLuint Width, Height;
2388    GLint RowStride;       /**< Padded width in units of pixels */
2389    GLboolean Purgeable;   /**< Is the buffer purgeable under memory pressure? */
2390
2391    GLboolean AttachedAnytime; /**< TRUE if it was attached to a framebuffer */
2392
2393    GLubyte NumSamples;
2394
2395    GLenum InternalFormat; /**< The user-specified format */
2396    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2397                                GL_STENCIL_INDEX. */
2398    gl_format Format;      /**< The actual renderbuffer memory format */
2399
2400    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2401    GLvoid *Data;        /**< This may not be used by some kinds of RBs */
2402
2403    /* Used to wrap one renderbuffer around another: */
2404    struct gl_renderbuffer *Wrapped;
2405
2406    /* Delete this renderbuffer */
2407    void (*Delete)(struct gl_renderbuffer *rb);
2408
2409    /* Allocate new storage for this renderbuffer */
2410    GLboolean (*AllocStorage)(struct gl_context *ctx, struct gl_renderbuffer *rb,
2411                              GLenum internalFormat,
2412                              GLuint width, GLuint height);
2413
2414    /* Lock/Unlock are called before/after calling the Get/Put functions.
2415     * Not sure this is the right place for these yet.
2416    void (*Lock)(struct gl_context *ctx, struct gl_renderbuffer *rb);
2417    void (*Unlock)(struct gl_context *ctx, struct gl_renderbuffer *rb);
2418     */
2419
2420    /* Return a pointer to the element/pixel at (x,y).
2421     * Should return NULL if the buffer memory can't be directly addressed.
2422     */
2423    void *(*GetPointer)(struct gl_context *ctx, struct gl_renderbuffer *rb,
2424                        GLint x, GLint y);
2425
2426    /* Get/Read a row of values.
2427     * The values will be of format _BaseFormat and type DataType.
2428     */
2429    void (*GetRow)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2430                   GLint x, GLint y, void *values);
2431
2432    /* Get/Read values at arbitrary locations.
2433     * The values will be of format _BaseFormat and type DataType.
2434     */
2435    void (*GetValues)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2436                      const GLint x[], const GLint y[], void *values);
2437
2438    /* Put/Write a row of values.
2439     * The values will be of format _BaseFormat and type DataType.
2440     */
2441    void (*PutRow)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2442                   GLint x, GLint y, const void *values, const GLubyte *mask);
2443
2444    /* Put/Write a row of RGB values.  This is a special-case routine that's
2445     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2446     * a common case for glDrawPixels and some triangle routines.
2447     * The values will be of format GL_RGB and type DataType.
2448     */
2449    void (*PutRowRGB)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2450                     GLint x, GLint y, const void *values, const GLubyte *mask);
2451
2452
2453    /* Put/Write a row of identical values.
2454     * The values will be of format _BaseFormat and type DataType.
2455     */
2456    void (*PutMonoRow)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2457                      GLint x, GLint y, const void *value, const GLubyte *mask);
2458
2459    /* Put/Write values at arbitrary locations.
2460     * The values will be of format _BaseFormat and type DataType.
2461     */
2462    void (*PutValues)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2463                      const GLint x[], const GLint y[], const void *values,
2464                      const GLubyte *mask);
2465    /* Put/Write identical values at arbitrary locations.
2466     * The values will be of format _BaseFormat and type DataType.
2467     */
2468    void (*PutMonoValues)(struct gl_context *ctx, struct gl_renderbuffer *rb,
2469                          GLuint count, const GLint x[], const GLint y[],
2470                          const void *value, const GLubyte *mask);
2471 };
2472
2473
2474 /**
2475  * A renderbuffer attachment points to either a texture object (and specifies
2476  * a mipmap level, cube face or 3D texture slice) or points to a renderbuffer.
2477  */
2478 struct gl_renderbuffer_attachment
2479 {
2480    GLenum Type;  /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
2481    GLboolean Complete;
2482
2483    /**
2484     * If \c Type is \c GL_RENDERBUFFER_EXT, this stores a pointer to the
2485     * application supplied renderbuffer object.
2486     */
2487    struct gl_renderbuffer *Renderbuffer;
2488
2489    /**
2490     * If \c Type is \c GL_TEXTURE, this stores a pointer to the application
2491     * supplied texture object.
2492     */
2493    struct gl_texture_object *Texture;
2494    GLuint TextureLevel; /**< Attached mipmap level. */
2495    GLuint CubeMapFace;  /**< 0 .. 5, for cube map textures. */
2496    GLuint Zoffset;      /**< Slice for 3D textures,  or layer for both 1D
2497                          * and 2D array textures */
2498 };
2499
2500
2501 /**
2502  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2503  * In C++ terms, think of this as a base class from which device drivers
2504  * will make derived classes.
2505  */
2506 struct gl_framebuffer
2507 {
2508    _glthread_Mutex Mutex;  /**< for thread safety */
2509    /**
2510     * If zero, this is a window system framebuffer.  If non-zero, this
2511     * is a FBO framebuffer; note that for some devices (i.e. those with
2512     * a natural pixel coordinate system for FBOs that differs from the
2513     * OpenGL/Mesa coordinate system), this means that the viewport,
2514     * polygon face orientation, and polygon stipple will have to be inverted.
2515     */
2516    GLuint Name;
2517
2518    GLint RefCount;
2519    GLboolean DeletePending;
2520
2521    /**
2522     * The framebuffer's visual. Immutable if this is a window system buffer.
2523     * Computed from attachments if user-made FBO.
2524     */
2525    struct gl_config Visual;
2526
2527    GLboolean Initialized;
2528
2529    GLuint Width, Height;        /**< size of frame buffer in pixels */
2530
2531    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2532    /*@{*/
2533    GLint _Xmin, _Xmax;  /**< inclusive */
2534    GLint _Ymin, _Ymax;  /**< exclusive */
2535    /*@}*/
2536
2537    /** \name  Derived Z buffer stuff */
2538    /*@{*/
2539    GLuint _DepthMax;    /**< Max depth buffer value */
2540    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2541    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2542    /*@}*/
2543
2544    /** One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2545    GLenum _Status;
2546
2547    /** Integer color values */
2548    GLboolean _IntegerColor;
2549
2550    /** Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2551    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2552
2553    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2554     * attribute group and GL_PIXEL attribute group, respectively.
2555     */
2556    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2557    GLenum ColorReadBuffer;
2558
2559    /** Computed from ColorDraw/ReadBuffer above */
2560    GLuint _NumColorDrawBuffers;
2561    GLint _ColorDrawBufferIndexes[MAX_DRAW_BUFFERS]; /**< BUFFER_x or -1 */
2562    GLint _ColorReadBufferIndex; /* -1 = None */
2563    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS];
2564    struct gl_renderbuffer *_ColorReadBuffer;
2565
2566    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2567     * depth/stencil buffers attached above. */
2568    struct gl_renderbuffer *_DepthBuffer;
2569    struct gl_renderbuffer *_StencilBuffer;
2570
2571    /** Delete this framebuffer */
2572    void (*Delete)(struct gl_framebuffer *fb);
2573 };
2574
2575
2576 /**
2577  * Precision info for shader datatypes.  See glGetShaderPrecisionFormat().
2578  */
2579 struct gl_precision
2580 {
2581    GLushort RangeMin;   /**< min value exponent */
2582    GLushort RangeMax;   /**< max value exponent */
2583    GLushort Precision;  /**< number of mantissa bits */
2584 };
2585
2586
2587 /**
2588  * Limits for vertex, geometry and fragment programs/shaders.
2589  */
2590 struct gl_program_constants
2591 {
2592    /* logical limits */
2593    GLuint MaxInstructions;
2594    GLuint MaxAluInstructions;
2595    GLuint MaxTexInstructions;
2596    GLuint MaxTexIndirections;
2597    GLuint MaxAttribs;
2598    GLuint MaxTemps;
2599    GLuint MaxAddressRegs;
2600    GLuint MaxAddressOffset;  /**< [-MaxAddressOffset, MaxAddressOffset-1] */
2601    GLuint MaxParameters;
2602    GLuint MaxLocalParams;
2603    GLuint MaxEnvParams;
2604    /* native/hardware limits */
2605    GLuint MaxNativeInstructions;
2606    GLuint MaxNativeAluInstructions;
2607    GLuint MaxNativeTexInstructions;
2608    GLuint MaxNativeTexIndirections;
2609    GLuint MaxNativeAttribs;
2610    GLuint MaxNativeTemps;
2611    GLuint MaxNativeAddressRegs;
2612    GLuint MaxNativeParameters;
2613    /* For shaders */
2614    GLuint MaxUniformComponents;  /**< Usually == MaxParameters * 4 */
2615    /* ES 2.0 and GL_ARB_ES2_compatibility */
2616    struct gl_precision LowFloat, MediumFloat, HighFloat;
2617    struct gl_precision LowInt, MediumInt, HighInt;
2618 };
2619
2620
2621 /**
2622  * Constants which may be overridden by device driver during context creation
2623  * but are never changed after that.
2624  */
2625 struct gl_constants
2626 {
2627    GLint MaxTextureMbytes;      /**< Max memory per image, in MB */
2628    GLint MaxTextureLevels;      /**< Max mipmap levels. */
2629    GLint Max3DTextureLevels;    /**< Max mipmap levels for 3D textures */
2630    GLint MaxCubeTextureLevels;  /**< Max mipmap levels for cube textures */
2631    GLint MaxArrayTextureLayers; /**< Max layers in array textures */
2632    GLint MaxTextureRectSize;    /**< Max rectangle texture size, in pixes */
2633    GLuint MaxTextureCoordUnits;
2634    GLuint MaxTextureImageUnits;
2635    GLuint MaxVertexTextureImageUnits;
2636    GLuint MaxCombinedTextureImageUnits;
2637    GLuint MaxGeometryTextureImageUnits;
2638    GLuint MaxTextureUnits;           /**< = MIN(CoordUnits, ImageUnits) */
2639    GLfloat MaxTextureMaxAnisotropy;  /**< GL_EXT_texture_filter_anisotropic */
2640    GLfloat MaxTextureLodBias;        /**< GL_EXT_texture_lod_bias */
2641    GLuint MaxTextureBufferSize;      /**< GL_ARB_texture_buffer_object */
2642
2643    GLuint MaxArrayLockSize;
2644
2645    GLint SubPixelBits;
2646
2647    GLfloat MinPointSize, MaxPointSize;       /**< aliased */
2648    GLfloat MinPointSizeAA, MaxPointSizeAA;   /**< antialiased */
2649    GLfloat PointSizeGranularity;
2650    GLfloat MinLineWidth, MaxLineWidth;       /**< aliased */
2651    GLfloat MinLineWidthAA, MaxLineWidthAA;   /**< antialiased */
2652    GLfloat LineWidthGranularity;
2653
2654    GLuint MaxColorTableSize;
2655
2656    GLuint MaxClipPlanes;
2657    GLuint MaxLights;
2658    GLfloat MaxShininess;                     /**< GL_NV_light_max_exponent */
2659    GLfloat MaxSpotExponent;                  /**< GL_NV_light_max_exponent */
2660
2661    GLuint MaxViewportWidth, MaxViewportHeight;
2662
2663    struct gl_program_constants VertexProgram;   /**< GL_ARB_vertex_program */
2664    struct gl_program_constants FragmentProgram; /**< GL_ARB_fragment_program */
2665    struct gl_program_constants GeometryProgram;  /**< GL_ARB_geometry_shader4 */
2666    GLuint MaxProgramMatrices;
2667    GLuint MaxProgramMatrixStackDepth;
2668
2669    /** vertex array / buffer object bounds checking */
2670    GLboolean CheckArrayBounds;
2671
2672    GLuint MaxDrawBuffers;    /**< GL_ARB_draw_buffers */
2673
2674    GLuint MaxColorAttachments;   /**< GL_EXT_framebuffer_object */
2675    GLuint MaxRenderbufferSize;   /**< GL_EXT_framebuffer_object */
2676    GLuint MaxSamples;            /**< GL_ARB_framebuffer_object */
2677
2678    /** Number of varying vectors between vertex and fragment shaders */
2679    GLuint MaxVarying;
2680    GLuint MaxVertexVaryingComponents;   /**< Between vert and geom shader */
2681    GLuint MaxGeometryVaryingComponents; /**< Between geom and frag shader */
2682
2683    /** GL_ARB_geometry_shader4 */
2684    GLuint MaxGeometryOutputVertices;
2685    GLuint MaxGeometryTotalOutputComponents;
2686
2687    GLuint GLSLVersion;  /**< GLSL version supported (ex: 120 = 1.20) */
2688
2689    /**
2690     * Does the driver support real 32-bit integers?  (Otherwise, integers are
2691     * simulated via floats.)
2692     */
2693    GLboolean NativeIntegers;
2694
2695    /**
2696     * If the driver supports real 32-bit integers, what integer value should be
2697     * used for boolean true in uniform uploads?  (Usually 1 or ~0.)
2698     */
2699    GLuint UniformBooleanTrue;
2700
2701    /** Which texture units support GL_ATI_envmap_bumpmap as targets */
2702    GLbitfield SupportedBumpUnits;
2703
2704    /**
2705     * Maximum amount of time, measured in nanseconds, that the server can wait.
2706     */
2707    GLuint64 MaxServerWaitTimeout;
2708
2709    /** GL_EXT_provoking_vertex */
2710    GLboolean QuadsFollowProvokingVertexConvention;
2711
2712    /** OpenGL version 3.0 */
2713    GLbitfield ContextFlags;  /**< Ex: GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT */
2714
2715    /** OpenGL version 3.2 */
2716    GLbitfield ProfileMask;   /**< Mask of CONTEXT_x_PROFILE_BIT */
2717
2718    /** GL_EXT_transform_feedback */
2719    GLuint MaxTransformFeedbackSeparateAttribs;
2720    GLuint MaxTransformFeedbackSeparateComponents;
2721    GLuint MaxTransformFeedbackInterleavedComponents;
2722
2723    /** GL_EXT_gpu_shader4 */
2724    GLint MinProgramTexelOffset, MaxProgramTexelOffset;
2725
2726    /* GL_EXT_framebuffer_sRGB */
2727    GLboolean sRGBCapable; /* can enable sRGB blend/update on FBOs */
2728
2729    /* GL_ARB_robustness */
2730    GLenum ResetStrategy;
2731 };
2732
2733
2734 /**
2735  * Enable flag for each OpenGL extension.  Different device drivers will
2736  * enable different extensions at runtime.
2737  */
2738 struct gl_extensions
2739 {
2740    GLboolean dummy;  /* don't remove this! */
2741    GLboolean dummy_true;  /* Set true by _mesa_init_extensions(). */
2742    GLboolean dummy_false; /* Set false by _mesa_init_extensions(). */
2743    GLboolean ARB_ES2_compatibility;
2744    GLboolean ARB_blend_func_extended;
2745    GLboolean ARB_color_buffer_float;
2746    GLboolean ARB_copy_buffer;
2747    GLboolean ARB_depth_buffer_float;
2748    GLboolean ARB_depth_clamp;
2749    GLboolean ARB_depth_texture;
2750    GLboolean ARB_draw_buffers;
2751    GLboolean ARB_draw_buffers_blend;
2752    GLboolean ARB_draw_elements_base_vertex;
2753    GLboolean ARB_draw_instanced;
2754    GLboolean ARB_fragment_coord_conventions;
2755    GLboolean ARB_fragment_program;
2756    GLboolean ARB_fragment_program_shadow;
2757    GLboolean ARB_fragment_shader;
2758    GLboolean ARB_framebuffer_object;
2759    GLboolean ARB_explicit_attrib_location;
2760    GLboolean ARB_geometry_shader4;
2761    GLboolean ARB_half_float_pixel;
2762    GLboolean ARB_half_float_vertex;
2763    GLboolean ARB_instanced_arrays;
2764    GLboolean ARB_map_buffer_range;
2765    GLboolean ARB_multisample;
2766    GLboolean ARB_multitexture;
2767    GLboolean ARB_occlusion_query;
2768    GLboolean ARB_occlusion_query2;
2769    GLboolean ARB_point_sprite;
2770    GLboolean ARB_sampler_objects;
2771    GLboolean ARB_seamless_cube_map;
2772    GLboolean ARB_shader_objects;
2773    GLboolean ARB_shader_stencil_export;
2774    GLboolean ARB_shader_texture_lod;
2775    GLboolean ARB_shading_language_100;
2776    GLboolean ARB_shadow;
2777    GLboolean ARB_shadow_ambient;
2778    GLboolean ARB_sync;
2779    GLboolean ARB_texture_border_clamp;
2780    GLboolean ARB_texture_buffer_object;
2781    GLboolean ARB_texture_compression;
2782    GLboolean ARB_texture_compression_rgtc;
2783    GLboolean ARB_texture_cube_map;
2784    GLboolean ARB_texture_env_combine;
2785    GLboolean ARB_texture_env_crossbar;
2786    GLboolean ARB_texture_env_dot3;
2787    GLboolean ARB_texture_float;
2788    GLboolean ARB_texture_mirrored_repeat;
2789    GLboolean ARB_texture_multisample;
2790    GLboolean ARB_texture_non_power_of_two;
2791    GLboolean ARB_texture_rg;
2792    GLboolean ARB_texture_rgb10_a2ui;
2793    GLboolean ARB_timer_query;
2794    GLboolean ARB_transform_feedback2;
2795    GLboolean ARB_transpose_matrix;
2796    GLboolean ARB_uniform_buffer_object;
2797    GLboolean ARB_vertex_array_object;
2798    GLboolean ARB_vertex_buffer_object;
2799    GLboolean ARB_vertex_program;
2800    GLboolean ARB_vertex_shader;
2801    GLboolean ARB_vertex_type_2_10_10_10_rev;
2802    GLboolean ARB_window_pos;
2803    GLboolean EXT_abgr;
2804    GLboolean EXT_bgra;
2805    GLboolean EXT_blend_color;
2806    GLboolean EXT_blend_equation_separate;
2807    GLboolean EXT_blend_func_separate;
2808    GLboolean EXT_blend_minmax;
2809    GLboolean EXT_blend_subtract;
2810    GLboolean EXT_clip_volume_hint;
2811    GLboolean EXT_compiled_vertex_array;
2812    GLboolean EXT_copy_texture;
2813    GLboolean EXT_depth_bounds_test;
2814    GLboolean EXT_draw_buffers2;
2815    GLboolean EXT_draw_range_elements;
2816    GLboolean EXT_fog_coord;
2817    GLboolean EXT_framebuffer_blit;
2818    GLboolean EXT_framebuffer_multisample;
2819    GLboolean EXT_framebuffer_object;
2820    GLboolean EXT_framebuffer_sRGB;
2821    GLboolean EXT_gpu_program_parameters;
2822    GLboolean EXT_gpu_shader4;
2823    GLboolean EXT_multi_draw_arrays;
2824    GLboolean EXT_packed_depth_stencil;
2825    GLboolean EXT_packed_float;
2826    GLboolean EXT_packed_pixels;
2827    GLboolean EXT_pixel_buffer_object;
2828    GLboolean EXT_point_parameters;
2829    GLboolean EXT_polygon_offset;
2830    GLboolean EXT_provoking_vertex;
2831    GLboolean EXT_rescale_normal;
2832    GLboolean EXT_shadow_funcs;
2833    GLboolean EXT_secondary_color;
2834    GLboolean EXT_separate_shader_objects;
2835    GLboolean EXT_separate_specular_color;
2836    GLboolean EXT_stencil_wrap;
2837    GLboolean EXT_stencil_two_side;
2838    GLboolean EXT_subtexture;
2839    GLboolean EXT_texture;
2840    GLboolean EXT_texture_object;
2841    GLboolean EXT_texture3D;
2842    GLboolean EXT_texture_array;
2843    GLboolean EXT_texture_compression_latc;
2844    GLboolean EXT_texture_compression_s3tc;
2845    GLboolean EXT_texture_env_add;
2846    GLboolean EXT_texture_env_combine;
2847    GLboolean EXT_texture_env_dot3;
2848    GLboolean EXT_texture_filter_anisotropic;
2849    GLboolean EXT_texture_integer;
2850    GLboolean EXT_texture_lod_bias;
2851    GLboolean EXT_texture_mirror_clamp;
2852    GLboolean EXT_texture_shared_exponent;
2853    GLboolean EXT_texture_snorm;
2854    GLboolean EXT_texture_sRGB;
2855    GLboolean EXT_texture_sRGB_decode;
2856    GLboolean EXT_texture_swizzle;
2857    GLboolean EXT_transform_feedback;
2858    GLboolean EXT_timer_query;
2859    GLboolean EXT_vertex_array;
2860    GLboolean EXT_vertex_array_bgra;
2861    GLboolean EXT_vertex_array_set;
2862    GLboolean OES_standard_derivatives;
2863    /* vendor extensions */
2864    GLboolean AMD_conservative_depth;
2865    GLboolean AMD_seamless_cubemap_per_texture;
2866    GLboolean APPLE_packed_pixels;
2867    GLboolean APPLE_vertex_array_object;
2868    GLboolean APPLE_object_purgeable;
2869    GLboolean ATI_envmap_bumpmap;
2870    GLboolean ATI_texture_compression_3dc;
2871    GLboolean ATI_texture_mirror_once;
2872    GLboolean ATI_texture_env_combine3;
2873    GLboolean ATI_fragment_shader;
2874    GLboolean ATI_separate_stencil;
2875    GLboolean IBM_rasterpos_clip;
2876    GLboolean IBM_multimode_draw_arrays;
2877    GLboolean MESA_pack_invert;
2878    GLboolean MESA_resize_buffers;
2879    GLboolean MESA_ycbcr_texture;
2880    GLboolean MESA_texture_array;
2881    GLboolean NV_blend_square;
2882    GLboolean NV_conditional_render;
2883    GLboolean NV_fragment_program;
2884    GLboolean NV_fragment_program_option;
2885    GLboolean NV_light_max_exponent;
2886    GLboolean NV_point_sprite;
2887    GLboolean NV_primitive_restart;
2888    GLboolean NV_texture_barrier;
2889    GLboolean NV_texgen_reflection;
2890    GLboolean NV_texture_env_combine4;
2891    GLboolean NV_texture_rectangle;
2892    GLboolean NV_vertex_program;
2893    GLboolean NV_vertex_program1_1;
2894    GLboolean OES_read_format;
2895    GLboolean SGIS_generate_mipmap;
2896    GLboolean SGIS_texture_edge_clamp;
2897    GLboolean SGIS_texture_lod;
2898    GLboolean TDFX_texture_compression_FXT1;
2899    GLboolean S3_s3tc;
2900    GLboolean OES_EGL_image;
2901    GLboolean OES_draw_texture;
2902    GLboolean EXT_texture_format_BGRA8888;
2903    GLboolean extension_sentinel;
2904    /** The extension string */
2905    const GLubyte *String;
2906    /** Number of supported extensions */
2907    GLuint Count;
2908 };
2909
2910
2911 /**
2912  * A stack of matrices (projection, modelview, color, texture, etc).
2913  */
2914 struct gl_matrix_stack
2915 {
2916    GLmatrix *Top;      /**< points into Stack */
2917    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2918    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2919    GLuint MaxDepth;    /**< size of Stack[] array */
2920    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2921 };
2922
2923
2924 /**
2925  * \name Bits for image transfer operations
2926  * \sa __struct gl_contextRec::ImageTransferState.
2927  */
2928 /*@{*/
2929 #define IMAGE_SCALE_BIAS_BIT                      0x1
2930 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2931 #define IMAGE_MAP_COLOR_BIT                       0x4
2932 #define IMAGE_CLAMP_BIT                           0x800
2933
2934
2935 /** Pixel Transfer ops */
2936 #define IMAGE_BITS (IMAGE_SCALE_BIAS_BIT |                      \
2937                     IMAGE_SHIFT_OFFSET_BIT |                    \
2938                     IMAGE_MAP_COLOR_BIT)
2939
2940 /**
2941  * \name Bits to indicate what state has changed.
2942  */
2943 /*@{*/
2944 #define _NEW_MODELVIEW         (1 << 0)   /**< gl_context::ModelView */
2945 #define _NEW_PROJECTION        (1 << 1)   /**< gl_context::Projection */
2946 #define _NEW_TEXTURE_MATRIX    (1 << 2)   /**< gl_context::TextureMatrix */
2947 #define _NEW_COLOR             (1 << 3)   /**< gl_context::Color */
2948 #define _NEW_DEPTH             (1 << 4)   /**< gl_context::Depth */
2949 #define _NEW_EVAL              (1 << 5)   /**< gl_context::Eval, EvalMap */
2950 #define _NEW_FOG               (1 << 6)   /**< gl_context::Fog */
2951 #define _NEW_HINT              (1 << 7)   /**< gl_context::Hint */
2952 #define _NEW_LIGHT             (1 << 8)   /**< gl_context::Light */
2953 #define _NEW_LINE              (1 << 9)   /**< gl_context::Line */
2954 #define _NEW_PIXEL             (1 << 10)  /**< gl_context::Pixel */
2955 #define _NEW_POINT             (1 << 11)  /**< gl_context::Point */
2956 #define _NEW_POLYGON           (1 << 12)  /**< gl_context::Polygon */
2957 #define _NEW_POLYGONSTIPPLE    (1 << 13)  /**< gl_context::PolygonStipple */
2958 #define _NEW_SCISSOR           (1 << 14)  /**< gl_context::Scissor */
2959 #define _NEW_STENCIL           (1 << 15)  /**< gl_context::Stencil */
2960 #define _NEW_TEXTURE           (1 << 16)  /**< gl_context::Texture */
2961 #define _NEW_TRANSFORM         (1 << 17)  /**< gl_context::Transform */
2962 #define _NEW_VIEWPORT          (1 << 18)  /**< gl_context::Viewport */
2963 #define _NEW_PACKUNPACK        (1 << 19)  /**< gl_context::Pack, Unpack */
2964 #define _NEW_ARRAY             (1 << 20)  /**< gl_context::Array */
2965 #define _NEW_RENDERMODE        (1 << 21)  /**< gl_context::RenderMode, etc */
2966 #define _NEW_BUFFERS           (1 << 22)  /**< gl_context::Visual, DrawBuffer, */
2967 #define _NEW_CURRENT_ATTRIB    (1 << 23)  /**< gl_context::Current */
2968 #define _NEW_MULTISAMPLE       (1 << 24)  /**< gl_context::Multisample */
2969 #define _NEW_TRACK_MATRIX      (1 << 25)  /**< gl_context::VertexProgram */
2970 #define _NEW_PROGRAM           (1 << 26)  /**< New program/shader state */
2971 #define _NEW_PROGRAM_CONSTANTS (1 << 27)
2972 #define _NEW_BUFFER_OBJECT     (1 << 28)
2973 #define _NEW_FRAG_CLAMP        (1 << 29)
2974 #define _NEW_ALL ~0
2975 /*@}*/
2976
2977
2978 /**
2979  * \name Bits to track array state changes
2980  *
2981  * Also used to summarize array enabled.
2982  */
2983 /*@{*/
2984 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2985 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2986 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2987 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2988 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2989 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2990 #define _NEW_ARRAY_INDEX            VERT_BIT_COLOR_INDEX
2991 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_EDGEFLAG
2992 #define _NEW_ARRAY_POINT_SIZE       VERT_BIT_COLOR_INDEX  /* aliased */
2993 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2994 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2995 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2996 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2997 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2998 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2999 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
3000 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
3001 #define _NEW_ARRAY_ATTRIB_0         VERT_BIT_GENERIC0  /* start at bit 16 */
3002 #define _NEW_ARRAY_ALL              0xffffffff
3003
3004
3005 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
3006 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
3007 /*@}*/
3008
3009
3010
3011 /**
3012  * \name A bunch of flags that we think might be useful to drivers.
3013  *
3014  * Set in the __struct gl_contextRec::_TriangleCaps bitfield.
3015  */
3016 /*@{*/
3017 #define DD_FLATSHADE                0x1
3018 #define DD_SEPARATE_SPECULAR        0x2
3019 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
3020 #define DD_TRI_LIGHT_TWOSIDE        0x8
3021 #define DD_TRI_UNFILLED             0x10
3022 #define DD_TRI_SMOOTH               0x20
3023 #define DD_TRI_STIPPLE              0x40
3024 #define DD_TRI_OFFSET               0x80
3025 #define DD_LINE_SMOOTH              0x100
3026 #define DD_LINE_STIPPLE             0x200
3027 #define DD_POINT_SMOOTH             0x400
3028 #define DD_POINT_ATTEN              0x800
3029 #define DD_TRI_TWOSTENCIL           0x1000
3030 /*@}*/
3031
3032
3033 /**
3034  * \name Define the state changes under which each of these bits might change
3035  */
3036 /*@{*/
3037 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
3038 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
3039 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
3040 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
3041 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
3042 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
3043 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
3044 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
3045 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
3046 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
3047 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
3048 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
3049 #define _DD_NEW_POINT_SIZE               _NEW_POINT
3050 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
3051 /*@}*/
3052
3053
3054 /**
3055  * Composite state flags
3056  */
3057 /*@{*/
3058 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
3059                                            _NEW_TEXTURE |       \
3060                                            _NEW_POINT |         \
3061                                            _NEW_PROGRAM |       \
3062                                            _NEW_MODELVIEW)
3063 /*@}*/
3064
3065
3066
3067
3068 /* This has to be included here. */
3069 #include "dd.h"
3070
3071
3072 /**
3073  * Display list flags.
3074  * Strictly this is a tnl-private concept, but it doesn't seem
3075  * worthwhile adding a tnl private structure just to hold this one bit
3076  * of information:
3077  */
3078 #define DLIST_DANGLING_REFS     0x1
3079
3080
3081 /** Opaque declaration of display list payload data type */
3082 union gl_dlist_node;
3083
3084
3085 /**
3086  * Provide a location where information about a display list can be
3087  * collected.  Could be extended with driverPrivate structures,
3088  * etc. in the future.
3089  */
3090 struct gl_display_list
3091 {
3092    GLuint Name;
3093    GLbitfield Flags;  /**< DLIST_x flags */
3094    /** The dlist commands are in a linked list of nodes */
3095    union gl_dlist_node *Head;
3096 };
3097
3098
3099 /**
3100  * State used during display list compilation and execution.
3101  */
3102 struct gl_dlist_state
3103 {
3104    GLuint CallDepth;            /**< Current recursion calling depth */
3105
3106    struct gl_display_list *CurrentList; /**< List currently being compiled */
3107    union gl_dlist_node *CurrentBlock; /**< Pointer to current block of nodes */
3108    GLuint CurrentPos;           /**< Index into current block of nodes */
3109
3110    GLvertexformat ListVtxfmt;
3111
3112    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
3113    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
3114
3115    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
3116    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
3117
3118    GLubyte ActiveIndex;
3119    GLfloat CurrentIndex;
3120
3121    GLubyte ActiveEdgeFlag;
3122    GLboolean CurrentEdgeFlag;
3123
3124    struct {
3125       /* State known to have been set by the currently-compiling display
3126        * list.  Used to eliminate some redundant state changes.
3127        */
3128       GLenum ShadeModel;
3129    } Current;
3130 };
3131
3132
3133 /**
3134  * Enum for the OpenGL APIs we know about and may support.
3135  */
3136 typedef enum
3137 {
3138    API_OPENGL,
3139    API_OPENGLES,
3140    API_OPENGLES2
3141 } gl_api;
3142
3143
3144 /**
3145  * Mesa rendering context.
3146  *
3147  * This is the central context data structure for Mesa.  Almost all
3148  * OpenGL state is contained in this structure.
3149  * Think of this as a base class from which device drivers will derive
3150  * sub classes.
3151  *
3152  * The struct gl_context typedef names this structure.
3153  */
3154 struct gl_context
3155 {
3156    /** State possibly shared with other contexts in the address space */
3157    struct gl_shared_state *Shared;
3158
3159    /** \name API function pointer tables */
3160    /*@{*/
3161    gl_api API;
3162    struct _glapi_table *Save;   /**< Display list save functions */
3163    struct _glapi_table *Exec;   /**< Execute functions */
3164    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
3165    /*@}*/
3166
3167    struct gl_config Visual;
3168    struct gl_framebuffer *DrawBuffer;   /**< buffer for writing */
3169    struct gl_framebuffer *ReadBuffer;   /**< buffer for reading */
3170    struct gl_framebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
3171    struct gl_framebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
3172
3173    /**
3174     * Device driver function pointer table
3175     */
3176    struct dd_function_table Driver;
3177
3178    void *DriverCtx;     /**< Points to device driver context/state */
3179
3180    /** Core/Driver constants */
3181    struct gl_constants Const;
3182
3183    /** \name The various 4x4 matrix stacks */
3184    /*@{*/
3185    struct gl_matrix_stack ModelviewMatrixStack;
3186    struct gl_matrix_stack ProjectionMatrixStack;
3187    struct gl_matrix_stack TextureMatrixStack[MAX_TEXTURE_UNITS];
3188    struct gl_matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
3189    struct gl_matrix_stack *CurrentStack; /**< Points to one of the above stacks */
3190    /*@}*/
3191
3192    /** Combined modelview and projection matrix */
3193    GLmatrix _ModelProjectMatrix;
3194
3195    /** \name Display lists */
3196    struct gl_dlist_state ListState;
3197
3198    GLboolean ExecuteFlag;       /**< Execute GL commands? */
3199    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
3200
3201    /** Extension information */
3202    struct gl_extensions Extensions;
3203
3204    /** Version info */
3205    GLuint VersionMajor, VersionMinor;
3206    char *VersionString;
3207
3208    /** \name State attribute stack (for glPush/PopAttrib) */
3209    /*@{*/
3210    GLuint AttribStackDepth;
3211    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
3212    /*@}*/
3213
3214    /** \name Renderer attribute groups
3215     *
3216     * We define a struct for each attribute group to make pushing and popping
3217     * attributes easy.  Also it's a good organization.
3218     */
3219    /*@{*/
3220    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
3221    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
3222    struct gl_current_attrib     Current;        /**< Current attributes */
3223    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
3224    struct gl_eval_attrib        Eval;           /**< Eval attributes */
3225    struct gl_fog_attrib         Fog;            /**< Fog attributes */
3226    struct gl_hint_attrib        Hint;           /**< Hint attributes */
3227    struct gl_light_attrib       Light;          /**< Light attributes */
3228    struct gl_line_attrib        Line;           /**< Line attributes */
3229    struct gl_list_attrib        List;           /**< List attributes */
3230    struct gl_multisample_attrib Multisample;
3231    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
3232    struct gl_point_attrib       Point;          /**< Point attributes */
3233    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
3234    GLuint PolygonStipple[32];                   /**< Polygon stipple */
3235    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
3236    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
3237    struct gl_texture_attrib     Texture;        /**< Texture attributes */
3238    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
3239    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
3240    /*@}*/
3241
3242    /** \name Client attribute stack */
3243    /*@{*/
3244    GLuint ClientAttribStackDepth;
3245    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
3246    /*@}*/
3247
3248    /** \name Client attribute groups */
3249    /*@{*/
3250    struct gl_array_attrib       Array;  /**< Vertex arrays */
3251    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
3252    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
3253    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
3254    /*@}*/
3255
3256    /** \name Other assorted state (not pushed/popped on attribute stack) */
3257    /*@{*/
3258    struct gl_pixelmaps          PixelMaps;
3259
3260    struct gl_evaluators EvalMap;   /**< All evaluators */
3261    struct gl_feedback   Feedback;  /**< Feedback */
3262    struct gl_selection  Select;    /**< Selection */
3263
3264    struct gl_program_state Program;  /**< general program state */
3265    struct gl_vertex_program_state VertexProgram;
3266    struct gl_fragment_program_state FragmentProgram;
3267    struct gl_geometry_program_state GeometryProgram;
3268    struct gl_ati_fragment_shader_state ATIFragmentShader;
3269
3270    struct gl_shader_state Shader; /**< GLSL shader object state */
3271    struct gl_shader_compiler_options ShaderCompilerOptions[MESA_SHADER_TYPES];
3272
3273    struct gl_query_state Query;  /**< occlusion, timer queries */
3274
3275    struct gl_transform_feedback TransformFeedback;
3276
3277    struct gl_buffer_object *CopyReadBuffer; /**< GL_ARB_copy_buffer */
3278    struct gl_buffer_object *CopyWriteBuffer; /**< GL_ARB_copy_buffer */
3279    /*@}*/
3280
3281    struct gl_meta_state *Meta;  /**< for "meta" operations */
3282
3283    /* GL_EXT_framebuffer_object */
3284    struct gl_renderbuffer *CurrentRenderbuffer;
3285
3286    GLenum ErrorValue;        /**< Last error code */
3287
3288    /* GL_ARB_robustness */
3289    GLenum ResetStatus;
3290
3291    /**
3292     * Recognize and silence repeated error debug messages in buggy apps.
3293     */
3294    const char *ErrorDebugFmtString;
3295    GLuint ErrorDebugCount;
3296
3297    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
3298    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
3299
3300    GLboolean ViewportInitialized;  /**< has viewport size been initialized? */
3301
3302    GLbitfield varying_vp_inputs;  /**< mask of VERT_BIT_* flags */
3303
3304    /** \name Derived state */
3305    /*@{*/
3306    /** Bitwise-or of DD_* flags.  Note that this bitfield may be used before
3307     * state validation so they need to always be current.
3308     */
3309    GLbitfield _TriangleCaps;
3310    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
3311    GLfloat _EyeZDir[3];
3312    GLfloat _ModelViewInvScale;
3313    GLboolean _NeedEyeCoords;
3314    GLboolean _ForceEyeCoords;
3315
3316    GLuint TextureStateTimestamp; /**< detect changes to shared state */
3317
3318    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
3319    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
3320    /**@}*/
3321
3322    struct gl_list_extensions *ListExt; /**< driver dlist extensions */
3323
3324    /** \name For debugging/development only */
3325    /*@{*/
3326    GLboolean FirstTimeCurrent;
3327    /*@}*/
3328
3329    /** software compression/decompression supported or not */
3330    GLboolean Mesa_DXTn;
3331
3332    GLboolean TextureFormatSupported[MESA_FORMAT_COUNT];
3333
3334    /**
3335     * Use dp4 (rather than mul/mad) instructions for position
3336     * transformation?
3337     */
3338    GLboolean mvp_with_dp4;
3339
3340    /**
3341     * \name Hooks for module contexts.
3342     *
3343     * These will eventually live in the driver or elsewhere.
3344     */
3345    /*@{*/
3346    void *swrast_context;
3347    void *swsetup_context;
3348    void *swtnl_context;
3349    void *swtnl_im;
3350    struct st_context *st;
3351    void *aelt_context;
3352    /*@}*/
3353 };
3354
3355
3356 #ifdef DEBUG
3357 extern int MESA_VERBOSE;
3358 extern int MESA_DEBUG_FLAGS;
3359 # define MESA_FUNCTION __FUNCTION__
3360 #else
3361 # define MESA_VERBOSE 0
3362 # define MESA_DEBUG_FLAGS 0
3363 # define MESA_FUNCTION "a function"
3364 # ifndef NDEBUG
3365 #  define NDEBUG
3366 # endif
3367 #endif
3368
3369
3370 /** The MESA_VERBOSE var is a bitmask of these flags */
3371 enum _verbose
3372 {
3373    VERBOSE_VARRAY               = 0x0001,
3374    VERBOSE_TEXTURE              = 0x0002,
3375    VERBOSE_MATERIAL             = 0x0004,
3376    VERBOSE_PIPELINE             = 0x0008,
3377    VERBOSE_DRIVER               = 0x0010,
3378    VERBOSE_STATE                = 0x0020,
3379    VERBOSE_API                  = 0x0040,
3380    VERBOSE_DISPLAY_LIST         = 0x0100,
3381    VERBOSE_LIGHTING             = 0x0200,
3382    VERBOSE_PRIMS                = 0x0400,
3383    VERBOSE_VERTS                = 0x0800,
3384    VERBOSE_DISASSEM             = 0x1000,
3385    VERBOSE_DRAW                 = 0x2000,
3386    VERBOSE_SWAPBUFFERS          = 0x4000
3387 };
3388
3389
3390 /** The MESA_DEBUG_FLAGS var is a bitmask of these flags */
3391 enum _debug
3392 {
3393    DEBUG_ALWAYS_FLUSH           = 0x1
3394 };
3395
3396
3397
3398 #endif /* MTYPES_H */