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 #ifdef __cplusplus
  47 extern "C" {
  48 #endif
  49
  50
  51 /**
  52  * \name 64-bit extension of GLbitfield.
  53  */
  54 /*@{*/
  55 typedef GLuint64 GLbitfield64;
  56
  57 /** Set a single bit */
  58 #define BITFIELD64_BIT(b)      ((GLbitfield64)1 << (b))
  59 /** Set all bits up to excluding bit b */
  60 #define BITFIELD64_MASK(b)      \
  61    ((b) == 64 ? (~(GLbitfield64)0) : BITFIELD64_BIT(b) - 1)
  62 /** Set count bits starting from bit b  */
  63 #define BITFIELD64_RANGE(b, count) \
  64    (BITFIELD64_MASK((b) + (count)) & ~BITFIELD64_MASK(b))
  65
  66
  67 /**
  68  * \name Some forward type declarations
  69  */
  70 /*@{*/
  71 struct _mesa_HashTable;
  72 struct gl_attrib_node;
  73 struct gl_list_extensions;
  74 struct gl_meta_state;
  75 struct gl_program_cache;
  76 struct gl_texture_object;
  77 struct gl_context;
  78 struct st_context;
  79 struct gl_uniform_storage;
  80 struct prog_instruction;
  81 struct gl_program_parameter_list;
  82 /*@}*/
  83
  84
  85 /** Extra draw modes beyond GL_POINTS, GL_TRIANGLE_FAN, etc */
  86 #define PRIM_OUTSIDE_BEGIN_END   (GL_POLYGON+1)
  87 #define PRIM_INSIDE_UNKNOWN_PRIM (GL_POLYGON+2)
  88 #define PRIM_UNKNOWN             (GL_POLYGON+3)
  89
  90
  91
  92 /**
  93  * Indexes for vertex program attributes.
  94  * GL_NV_vertex_program aliases generic attributes over the conventional
  95  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
  96  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
  97  * generic attributes are distinct/separate).
  98  */
  99 typedef enum
 100 {
 101    VERT_ATTRIB_POS = 0,
 102    VERT_ATTRIB_WEIGHT = 1,
 103    VERT_ATTRIB_NORMAL = 2,
 104    VERT_ATTRIB_COLOR0 = 3,
 105    VERT_ATTRIB_COLOR1 = 4,
 106    VERT_ATTRIB_FOG = 5,
 107    VERT_ATTRIB_COLOR_INDEX = 6,
 108    VERT_ATTRIB_EDGEFLAG = 7,
 109    VERT_ATTRIB_TEX0 = 8,
 110    VERT_ATTRIB_TEX1 = 9,
 111    VERT_ATTRIB_TEX2 = 10,
 112    VERT_ATTRIB_TEX3 = 11,
 113    VERT_ATTRIB_TEX4 = 12,
 114    VERT_ATTRIB_TEX5 = 13,
 115    VERT_ATTRIB_TEX6 = 14,
 116    VERT_ATTRIB_TEX7 = 15,
 117    VERT_ATTRIB_POINT_SIZE = 16,
 118    VERT_ATTRIB_GENERIC0 = 17,
 119    VERT_ATTRIB_GENERIC1 = 18,
 120    VERT_ATTRIB_GENERIC2 = 19,
 121    VERT_ATTRIB_GENERIC3 = 20,
 122    VERT_ATTRIB_GENERIC4 = 21,
 123    VERT_ATTRIB_GENERIC5 = 22,
 124    VERT_ATTRIB_GENERIC6 = 23,
 125    VERT_ATTRIB_GENERIC7 = 24,
 126    VERT_ATTRIB_GENERIC8 = 25,
 127    VERT_ATTRIB_GENERIC9 = 26,
 128    VERT_ATTRIB_GENERIC10 = 27,
 129    VERT_ATTRIB_GENERIC11 = 28,
 130    VERT_ATTRIB_GENERIC12 = 29,
 131    VERT_ATTRIB_GENERIC13 = 30,
 132    VERT_ATTRIB_GENERIC14 = 31,
 133    VERT_ATTRIB_GENERIC15 = 32,
 134    VERT_ATTRIB_MAX = 33
 135 } gl_vert_attrib;
 136
 137 /**
 138  * Symbolic constats to help iterating over
 139  * specific blocks of vertex attributes.
 140  *
 141  * VERT_ATTRIB_FF
 142  *   includes all fixed function attributes as well as
 143  *   the aliased GL_NV_vertex_program shader attributes.
 144  * VERT_ATTRIB_TEX
 145  *   include the classic texture coordinate attributes.
 146  *   Is a subset of VERT_ATTRIB_FF.
 147  * VERT_ATTRIB_GENERIC_NV
 148  *   include the NV shader attributes.
 149  *   Is a subset of VERT_ATTRIB_FF.
 150  * VERT_ATTRIB_GENERIC
 151  *   include the OpenGL 2.0+ GLSL generic shader attributes.
 152  *   These alias the generic GL_ARB_vertex_shader attributes.
 153  */
 154 #define VERT_ATTRIB_FF(i)           (VERT_ATTRIB_POS + (i))
 155 #define VERT_ATTRIB_FF_MAX          VERT_ATTRIB_GENERIC0
 156
 157 #define VERT_ATTRIB_TEX(i)          (VERT_ATTRIB_TEX0 + (i))
 158 #define VERT_ATTRIB_TEX_MAX         MAX_TEXTURE_COORD_UNITS
 159
 160 #define VERT_ATTRIB_GENERIC_NV(i)   (VERT_ATTRIB_POS + (i))
 161 #define VERT_ATTRIB_GENERIC_NV_MAX  MAX_VERTEX_GENERIC_ATTRIBS
 162
 163 #define VERT_ATTRIB_GENERIC(i)      (VERT_ATTRIB_GENERIC0 + (i))
 164 #define VERT_ATTRIB_GENERIC_MAX     MAX_VERTEX_GENERIC_ATTRIBS
 165
 166 /**
 167  * Bitflags for vertex attributes.
 168  * These are used in bitfields in many places.
 169  */
 170 /*@{*/
 171 #define VERT_BIT_POS             BITFIELD64_BIT(VERT_ATTRIB_POS)
 172 #define VERT_BIT_WEIGHT          BITFIELD64_BIT(VERT_ATTRIB_WEIGHT)
 173 #define VERT_BIT_NORMAL          BITFIELD64_BIT(VERT_ATTRIB_NORMAL)
 174 #define VERT_BIT_COLOR0          BITFIELD64_BIT(VERT_ATTRIB_COLOR0)
 175 #define VERT_BIT_COLOR1          BITFIELD64_BIT(VERT_ATTRIB_COLOR1)
 176 #define VERT_BIT_FOG             BITFIELD64_BIT(VERT_ATTRIB_FOG)
 177 #define VERT_BIT_COLOR_INDEX     BITFIELD64_BIT(VERT_ATTRIB_COLOR_INDEX)
 178 #define VERT_BIT_EDGEFLAG        BITFIELD64_BIT(VERT_ATTRIB_EDGEFLAG)
 179 #define VERT_BIT_TEX0            BITFIELD64_BIT(VERT_ATTRIB_TEX0)
 180 #define VERT_BIT_TEX1            BITFIELD64_BIT(VERT_ATTRIB_TEX1)
 181 #define VERT_BIT_TEX2            BITFIELD64_BIT(VERT_ATTRIB_TEX2)
 182 #define VERT_BIT_TEX3            BITFIELD64_BIT(VERT_ATTRIB_TEX3)
 183 #define VERT_BIT_TEX4            BITFIELD64_BIT(VERT_ATTRIB_TEX4)
 184 #define VERT_BIT_TEX5            BITFIELD64_BIT(VERT_ATTRIB_TEX5)
 185 #define VERT_BIT_TEX6            BITFIELD64_BIT(VERT_ATTRIB_TEX6)
 186 #define VERT_BIT_TEX7            BITFIELD64_BIT(VERT_ATTRIB_TEX7)
 187 #define VERT_BIT_POINT_SIZE      BITFIELD64_BIT(VERT_ATTRIB_POINT_SIZE)
 188 #define VERT_BIT_GENERIC0        BITFIELD64_BIT(VERT_ATTRIB_GENERIC0)
 189
 190 #define VERT_BIT(i)              BITFIELD64_BIT(i)
 191 #define VERT_BIT_ALL             BITFIELD64_RANGE(0, VERT_ATTRIB_MAX)
 192
 193 #define VERT_BIT_FF(i)           VERT_BIT(i)
 194 #define VERT_BIT_FF_ALL          BITFIELD64_RANGE(0, VERT_ATTRIB_FF_MAX)
 195 #define VERT_BIT_TEX(i)          VERT_BIT(VERT_ATTRIB_TEX(i))
 196 #define VERT_BIT_TEX_ALL         \
 197    BITFIELD64_RANGE(VERT_ATTRIB_TEX(0), VERT_ATTRIB_TEX_MAX)
 198 #define VERT_BIT_FF_NVALIAS      \
 199    BITFIELD64_RANGE(VERT_ATTRIB_POS, VERT_ATTRIB_TEX(VERT_ATTRIB_TEX_MAX))
 200
 201 #define VERT_BIT_GENERIC_NV(i)   VERT_BIT(VERT_ATTRIB_GENERIC_NV(i))
 202 #define VERT_BIT_GENERIC_NV_ALL  \
 203    BITFIELD64_RANGE(VERT_ATTRIB_GENERIC_NV(0), VERT_ATTRIB_GENERIC_NV_MAX)
 204
 205 #define VERT_BIT_GENERIC(i)      VERT_BIT(VERT_ATTRIB_GENERIC(i))
 206 #define VERT_BIT_GENERIC_ALL     \
 207    BITFIELD64_RANGE(VERT_ATTRIB_GENERIC(0), VERT_ATTRIB_GENERIC_MAX)
 208 /*@}*/
 209
 210
 211 /**
 212  * Indexes for vertex program result attributes.  Note that
 213  * _mesa_vert_result_to_frag_attrib() and _mesa_frag_attrib_to_vert_result() make
 214  * assumptions about the layout of this enum.
 215  */
 216 typedef enum
 217 {
 218    VERT_RESULT_HPOS = 0,
 219    VERT_RESULT_COL0 = 1,
 220    VERT_RESULT_COL1 = 2,
 221    VERT_RESULT_FOGC = 3,
 222    VERT_RESULT_TEX0 = 4,
 223    VERT_RESULT_TEX1 = 5,
 224    VERT_RESULT_TEX2 = 6,
 225    VERT_RESULT_TEX3 = 7,
 226    VERT_RESULT_TEX4 = 8,
 227    VERT_RESULT_TEX5 = 9,
 228    VERT_RESULT_TEX6 = 10,
 229    VERT_RESULT_TEX7 = 11,
 230    VERT_RESULT_PSIZ = 12,
 231    VERT_RESULT_BFC0 = 13,
 232    VERT_RESULT_BFC1 = 14,
 233    VERT_RESULT_EDGE = 15,
 234    VERT_RESULT_CLIP_VERTEX = 16,
 235    VERT_RESULT_CLIP_DIST0 = 17,
 236    VERT_RESULT_CLIP_DIST1 = 18,
 237    VERT_RESULT_VAR0 = 19,  /**< shader varying */
 238    VERT_RESULT_MAX = (VERT_RESULT_VAR0 + MAX_VARYING)
 239 } gl_vert_result;
 240
 241
 242 /*********************************************/
 243
 244 /**
 245  * Indexes for geometry program attributes.
 246  */
 247 typedef enum
 248 {
 249    GEOM_ATTRIB_POSITION = 0,
 250    GEOM_ATTRIB_COLOR0 = 1,
 251    GEOM_ATTRIB_COLOR1 = 2,
 252    GEOM_ATTRIB_SECONDARY_COLOR0 = 3,
 253    GEOM_ATTRIB_SECONDARY_COLOR1 = 4,
 254    GEOM_ATTRIB_FOG_FRAG_COORD = 5,
 255    GEOM_ATTRIB_POINT_SIZE = 6,
 256    GEOM_ATTRIB_CLIP_VERTEX = 7,
 257    GEOM_ATTRIB_PRIMITIVE_ID = 8,
 258    GEOM_ATTRIB_TEX_COORD = 9,
 259
 260    GEOM_ATTRIB_VAR0 = 16,
 261    GEOM_ATTRIB_MAX = (GEOM_ATTRIB_VAR0 + MAX_VARYING)
 262 } gl_geom_attrib;
 263
 264 /**
 265  * Bitflags for geometry attributes.
 266  * These are used in bitfields in many places.
 267  */
 268 /*@{*/
 269 #define GEOM_BIT_COLOR0      (1 << GEOM_ATTRIB_COLOR0)
 270 #define GEOM_BIT_COLOR1      (1 << GEOM_ATTRIB_COLOR1)
 271 #define GEOM_BIT_SCOLOR0     (1 << GEOM_ATTRIB_SECONDARY_COLOR0)
 272 #define GEOM_BIT_SCOLOR1     (1 << GEOM_ATTRIB_SECONDARY_COLOR1)
 273 #define GEOM_BIT_TEX_COORD   (1 << GEOM_ATTRIB_TEX_COORD)
 274 #define GEOM_BIT_FOG_COORD   (1 << GEOM_ATTRIB_FOG_FRAG_COORD)
 275 #define GEOM_BIT_POSITION    (1 << GEOM_ATTRIB_POSITION)
 276 #define GEOM_BIT_POINT_SIDE  (1 << GEOM_ATTRIB_POINT_SIZE)
 277 #define GEOM_BIT_CLIP_VERTEX (1 << GEOM_ATTRIB_CLIP_VERTEX)
 278 #define GEOM_BIT_PRIM_ID     (1 << GEOM_ATTRIB_PRIMITIVE_ID)
 279 #define GEOM_BIT_VAR0        (1 << GEOM_ATTRIB_VAR0)
 280
 281 #define GEOM_BIT_VAR(g)  (1 << (GEOM_BIT_VAR0 + (g)))
 282 /*@}*/
 283
 284
 285 /**
 286  * Indexes for geometry program result attributes
 287  */
 288 typedef enum
 289 {
 290    GEOM_RESULT_POS  = 0,
 291    GEOM_RESULT_COL0  = 1,
 292    GEOM_RESULT_COL1  = 2,
 293    GEOM_RESULT_SCOL0 = 3,
 294    GEOM_RESULT_SCOL1 = 4,
 295    GEOM_RESULT_FOGC = 5,
 296    GEOM_RESULT_TEX0 = 6,
 297    GEOM_RESULT_TEX1 = 7,
 298    GEOM_RESULT_TEX2 = 8,
 299    GEOM_RESULT_TEX3 = 9,
 300    GEOM_RESULT_TEX4 = 10,
 301    GEOM_RESULT_TEX5 = 11,
 302    GEOM_RESULT_TEX6 = 12,
 303    GEOM_RESULT_TEX7 = 13,
 304    GEOM_RESULT_PSIZ = 14,
 305    GEOM_RESULT_CLPV = 15,
 306    GEOM_RESULT_PRID = 16,
 307    GEOM_RESULT_LAYR = 17,
 308    GEOM_RESULT_VAR0 = 18,  /**< shader varying, should really be 16 */
 309    /* ### we need to -2 because var0 is 18 instead 16 like in the others */
 310    GEOM_RESULT_MAX  =  (GEOM_RESULT_VAR0 + MAX_VARYING - 2)
 311 } gl_geom_result;
 312
 313
 314 /**
 315  * Indexes for fragment program input attributes.  Note that
 316  * _mesa_vert_result_to_frag_attrib() and frag_attrib_to_vert_result() make
 317  * assumptions about the layout of this enum.
 318  */
 319 typedef enum
 320 {
 321    FRAG_ATTRIB_WPOS = 0,
 322    FRAG_ATTRIB_COL0 = 1,
 323    FRAG_ATTRIB_COL1 = 2,
 324    FRAG_ATTRIB_FOGC = 3,
 325    FRAG_ATTRIB_TEX0 = 4,
 326    FRAG_ATTRIB_TEX1 = 5,
 327    FRAG_ATTRIB_TEX2 = 6,
 328    FRAG_ATTRIB_TEX3 = 7,
 329    FRAG_ATTRIB_TEX4 = 8,
 330    FRAG_ATTRIB_TEX5 = 9,
 331    FRAG_ATTRIB_TEX6 = 10,
 332    FRAG_ATTRIB_TEX7 = 11,
 333    FRAG_ATTRIB_FACE = 12,  /**< front/back face */
 334    FRAG_ATTRIB_PNTC = 13,  /**< sprite/point coord */
 335    FRAG_ATTRIB_CLIP_DIST0 = 14,
 336    FRAG_ATTRIB_CLIP_DIST1 = 15,
 337    FRAG_ATTRIB_VAR0 = 16,  /**< shader varying */
 338    FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + MAX_VARYING)
 339 } gl_frag_attrib;
 340
 341
 342 /**
 343  * Convert from a gl_vert_result value to the corresponding gl_frag_attrib.
 344  *
 345  * VERT_RESULT_HPOS is converted to FRAG_ATTRIB_WPOS.
 346  *
 347  * gl_vert_result values which have no corresponding gl_frag_attrib
 348  * (VERT_RESULT_PSIZ, VERT_RESULT_BFC0, VERT_RESULT_BFC1, and
 349  * VERT_RESULT_EDGE) are converted to a value of -1.
 350  */
 351 static inline int
 352 _mesa_vert_result_to_frag_attrib(gl_vert_result vert_result)
 353 {
 354    if (vert_result >= VERT_RESULT_CLIP_DIST0)
 355       return vert_result - VERT_RESULT_CLIP_DIST0 + FRAG_ATTRIB_CLIP_DIST0;
 356    else if (vert_result <= VERT_RESULT_TEX7)
 357       return vert_result;
 358    else
 359       return -1;
 360 }
 361
 362
 363 /**
 364  * Convert from a gl_frag_attrib value to the corresponding gl_vert_result.
 365  *
 366  * FRAG_ATTRIB_WPOS is converted to VERT_RESULT_HPOS.
 367  *
 368  * gl_frag_attrib values which have no corresponding gl_vert_result
 369  * (FRAG_ATTRIB_FACE and FRAG_ATTRIB_PNTC) are converted to a value of -1.
 370  */
 371 static inline int
 372 _mesa_frag_attrib_to_vert_result(gl_frag_attrib frag_attrib)
 373 {
 374    if (frag_attrib <= FRAG_ATTRIB_TEX7)
 375       return frag_attrib;
 376    else if (frag_attrib >= FRAG_ATTRIB_CLIP_DIST0)
 377       return frag_attrib - FRAG_ATTRIB_CLIP_DIST0 + VERT_RESULT_CLIP_DIST0;
 378    else
 379       return -1;
 380 }
 381
 382
 383 /**
 384  * Bitflags for fragment program input attributes.
 385  */
 386 /*@{*/
 387 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 388 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 389 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 390 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 391 #define FRAG_BIT_FACE  (1 << FRAG_ATTRIB_FACE)
 392 #define FRAG_BIT_PNTC  (1 << FRAG_ATTRIB_PNTC)
 393 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 394 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 395 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 396 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 397 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 398 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 399 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 400 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 401 #define FRAG_BIT_VAR0  (1 << FRAG_ATTRIB_VAR0)
 402
 403 #define FRAG_BIT_TEX(U)  (FRAG_BIT_TEX0 << (U))
 404 #define FRAG_BIT_VAR(V)  (FRAG_BIT_VAR0 << (V))
 405
 406 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 407                            FRAG_BIT_TEX1|       \
 408                            FRAG_BIT_TEX2|       \
 409                            FRAG_BIT_TEX3|       \
 410                            FRAG_BIT_TEX4|       \
 411                            FRAG_BIT_TEX5|       \
 412                            FRAG_BIT_TEX6|       \
 413                            FRAG_BIT_TEX7)
 414 /*@}*/
 415
 416
 417 /**
 418  * Fragment program results
 419  */
 420 typedef enum
 421 {
 422    FRAG_RESULT_DEPTH = 0,
 423    FRAG_RESULT_STENCIL = 1,
 424    /* If a single color should be written to all render targets, this
 425     * register is written.  No FRAG_RESULT_DATAn will be written.
 426     */
 427    FRAG_RESULT_COLOR = 2,
 428
 429    /* FRAG_RESULT_DATAn are the per-render-target (GLSL gl_FragData[n]
 430     * or ARB_fragment_program fragment.color[n]) color results.  If
 431     * any are written, FRAG_RESULT_COLOR will not be written.
 432     */
 433    FRAG_RESULT_DATA0 = 3,
 434    FRAG_RESULT_MAX = (FRAG_RESULT_DATA0 + MAX_DRAW_BUFFERS)
 435 } gl_frag_result;
 436
 437
 438 /**
 439  * Indexes for all renderbuffers
 440  */
 441 typedef enum
 442 {
 443    /* the four standard color buffers */
 444    BUFFER_FRONT_LEFT,
 445    BUFFER_BACK_LEFT,
 446    BUFFER_FRONT_RIGHT,
 447    BUFFER_BACK_RIGHT,
 448    BUFFER_DEPTH,
 449    BUFFER_STENCIL,
 450    BUFFER_ACCUM,
 451    /* optional aux buffer */
 452    BUFFER_AUX0,
 453    /* generic renderbuffers */
 454    BUFFER_COLOR0,
 455    BUFFER_COLOR1,
 456    BUFFER_COLOR2,
 457    BUFFER_COLOR3,
 458    BUFFER_COLOR4,
 459    BUFFER_COLOR5,
 460    BUFFER_COLOR6,
 461    BUFFER_COLOR7,
 462    BUFFER_COUNT
 463 } gl_buffer_index;
 464
 465 /**
 466  * Bit flags for all renderbuffers
 467  */
 468 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 469 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 470 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 471 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 472 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 473 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 474 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 475 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 476 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 477 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 478 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 479 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 480 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 481 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 482 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 483 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 484 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 485 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 486 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 487
 488 /**
 489  * Mask of all the color buffer bits (but not accum).
 490  */
 491 #define BUFFER_BITS_COLOR  (BUFFER_BIT_FRONT_LEFT | \
 492                             BUFFER_BIT_BACK_LEFT | \
 493                             BUFFER_BIT_FRONT_RIGHT | \
 494                             BUFFER_BIT_BACK_RIGHT | \
 495                             BUFFER_BIT_AUX0 | \
 496                             BUFFER_BIT_COLOR0 | \
 497                             BUFFER_BIT_COLOR1 | \
 498                             BUFFER_BIT_COLOR2 | \
 499                             BUFFER_BIT_COLOR3 | \
 500                             BUFFER_BIT_COLOR4 | \
 501                             BUFFER_BIT_COLOR5 | \
 502                             BUFFER_BIT_COLOR6 | \
 503                             BUFFER_BIT_COLOR7)
 504
 505
 506 /**
 507  * Framebuffer configuration (aka visual / pixelformat)
 508  * Note: some of these fields should be boolean, but it appears that
 509  * code in drivers/dri/common/util.c requires int-sized fields.
 510  */
 511 struct gl_config
 512 {
 513    GLboolean rgbMode;
 514    GLboolean floatMode;
 515    GLboolean colorIndexMode;  /* XXX is this used anywhere? */
 516    GLuint doubleBufferMode;
 517    GLuint stereoMode;
 518
 519    GLboolean haveAccumBuffer;
 520    GLboolean haveDepthBuffer;
 521    GLboolean haveStencilBuffer;
 522
 523    GLint redBits, greenBits, blueBits, alphaBits;       /* bits per comp */
 524    GLuint redMask, greenMask, blueMask, alphaMask;
 525    GLint rgbBits;               /* total bits for rgb */
 526    GLint indexBits;             /* total bits for colorindex */
 527
 528    GLint accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits;
 529    GLint depthBits;
 530    GLint stencilBits;
 531
 532    GLint numAuxBuffers;
 533
 534    GLint level;
 535
 536    /* EXT_visual_rating / GLX 1.2 */
 537    GLint visualRating;
 538
 539    /* EXT_visual_info / GLX 1.2 */
 540    GLint transparentPixel;
 541    /*    colors are floats scaled to ints */
 542    GLint transparentRed, transparentGreen, transparentBlue, transparentAlpha;
 543    GLint transparentIndex;
 544
 545    /* ARB_multisample / SGIS_multisample */
 546    GLint sampleBuffers;
 547    GLint samples;
 548
 549    /* SGIX_pbuffer / GLX 1.3 */
 550    GLint maxPbufferWidth;
 551    GLint maxPbufferHeight;
 552    GLint maxPbufferPixels;
 553    GLint optimalPbufferWidth;   /* Only for SGIX_pbuffer. */
 554    GLint optimalPbufferHeight;  /* Only for SGIX_pbuffer. */
 555
 556    /* OML_swap_method */
 557    GLint swapMethod;
 558
 559    /* EXT_texture_from_pixmap */
 560    GLint bindToTextureRgb;
 561    GLint bindToTextureRgba;
 562    GLint bindToMipmapTexture;
 563    GLint bindToTextureTargets;
 564    GLint yInverted;
 565
 566    /* EXT_framebuffer_sRGB */
 567    GLint sRGBCapable;
 568 };
 569
 570
 571 /**
 572  * \name Bit flags used for updating material values.
 573  */
 574 /*@{*/
 575 #define MAT_ATTRIB_FRONT_AMBIENT           0
 576 #define MAT_ATTRIB_BACK_AMBIENT            1
 577 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 578 #define MAT_ATTRIB_BACK_DIFFUSE            3
 579 #define MAT_ATTRIB_FRONT_SPECULAR          4
 580 #define MAT_ATTRIB_BACK_SPECULAR           5
 581 #define MAT_ATTRIB_FRONT_EMISSION          6
 582 #define MAT_ATTRIB_BACK_EMISSION           7
 583 #define MAT_ATTRIB_FRONT_SHININESS         8
 584 #define MAT_ATTRIB_BACK_SHININESS          9
 585 #define MAT_ATTRIB_FRONT_INDEXES           10
 586 #define MAT_ATTRIB_BACK_INDEXES            11
 587 #define MAT_ATTRIB_MAX                     12
 588
 589 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 590 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 591 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 592 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 593 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 594 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 595
 596 #define MAT_INDEX_AMBIENT  0
 597 #define MAT_INDEX_DIFFUSE  1
 598 #define MAT_INDEX_SPECULAR 2
 599
 600 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 601 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 602 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 603 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 604 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 605 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 606 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 607 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 608 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 609 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 610 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 611 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 612
 613
 614 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 615                                  MAT_BIT_FRONT_AMBIENT |        \
 616                                  MAT_BIT_FRONT_DIFFUSE |        \
 617                                  MAT_BIT_FRONT_SPECULAR |       \
 618                                  MAT_BIT_FRONT_SHININESS |      \
 619                                  MAT_BIT_FRONT_INDEXES)
 620
 621 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 622                                  MAT_BIT_BACK_AMBIENT |         \
 623                                  MAT_BIT_BACK_DIFFUSE |         \
 624                                  MAT_BIT_BACK_SPECULAR |        \
 625                                  MAT_BIT_BACK_SHININESS |       \
 626                                  MAT_BIT_BACK_INDEXES)
 627
 628 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 629 /*@}*/
 630
 631
 632 /**
 633  * Light source state.
 634  */
 635 struct gl_light
 636 {
 637    struct gl_light *next;       /**< double linked list with sentinel */
 638    struct gl_light *prev;
 639
 640    GLfloat Ambient[4];          /**< ambient color */
 641    GLfloat Diffuse[4];          /**< diffuse color */
 642    GLfloat Specular[4];         /**< specular color */
 643    GLfloat EyePosition[4];      /**< position in eye coordinates */
 644    GLfloat SpotDirection[4];    /**< spotlight direction in eye coordinates */
 645    GLfloat SpotExponent;
 646    GLfloat SpotCutoff;          /**< in degrees */
 647    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 648    GLfloat ConstantAttenuation;
 649    GLfloat LinearAttenuation;
 650    GLfloat QuadraticAttenuation;
 651    GLboolean Enabled;           /**< On/off flag */
 652
 653    /**
 654     * \name Derived fields
 655     */
 656    /*@{*/
 657    GLbitfield _Flags;           /**< State */
 658
 659    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 660    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 661    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 662    GLfloat _NormSpotDirection[4]; /**< normalized spotlight direction */
 663    GLfloat _VP_inf_spot_attenuation;
 664
 665    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 666    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 667    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 668    /*@}*/
 669 };
 670
 671
 672 /**
 673  * Light model state.
 674  */
 675 struct gl_lightmodel
 676 {
 677    GLfloat Ambient[4];          /**< ambient color */
 678    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 679    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 680    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 681                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 682 };
 683
 684
 685 /**
 686  * Material state.
 687  */
 688 struct gl_material
 689 {
 690    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 691 };
 692
 693
 694 /**
 695  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 696  */
 697 struct gl_accum_attrib
 698 {
 699    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 700 };
 701
 702
 703 /**
 704  * Used for storing clear color, texture border color, etc.
 705  * The float values are typically unclamped.
 706  */
 707 union gl_color_union
 708 {
 709    GLfloat f[4];
 710    GLint i[4];
 711    GLuint ui[4];
 712 };
 713
 714
 715 /**
 716  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 717  */
 718 struct gl_colorbuffer_attrib
 719 {
 720    GLuint ClearIndex;                      /**< Index for glClear */
 721    union gl_color_union ClearColor;        /**< Color for glClear, unclamped */
 722    GLuint IndexMask;                       /**< Color index write mask */
 723    GLubyte ColorMask[MAX_DRAW_BUFFERS][4]; /**< Each flag is 0xff or 0x0 */
 724
 725    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 726
 727    /**
 728     * \name alpha testing
 729     */
 730    /*@{*/
 731    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 732    GLenum AlphaFunc;                    /**< Alpha test function */
 733    GLfloat AlphaRefUnclamped;
 734    GLclampf AlphaRef;                   /**< Alpha reference value */
 735    /*@}*/
 736
 737    /**
 738     * \name Blending
 739     */
 740    /*@{*/
 741    GLbitfield BlendEnabled;             /**< Per-buffer blend enable flags */
 742
 743    /* NOTE: this does _not_ depend on fragment clamping or any other clamping
 744     * control, only on the fixed-pointness of the render target.
 745     * The query does however depend on fragment color clamping.
 746     */
 747    GLfloat BlendColorUnclamped[4];               /**< Blending color */
 748    GLfloat BlendColor[4];               /**< Blending color */
 749
 750    struct
 751    {
 752       GLenum SrcRGB;             /**< RGB blend source term */
 753       GLenum DstRGB;             /**< RGB blend dest term */
 754       GLenum SrcA;               /**< Alpha blend source term */
 755       GLenum DstA;               /**< Alpha blend dest term */
 756       GLenum EquationRGB;        /**< GL_ADD, GL_SUBTRACT, etc. */
 757       GLenum EquationA;          /**< GL_ADD, GL_SUBTRACT, etc. */
 758    } Blend[MAX_DRAW_BUFFERS];
 759    /** Are the blend func terms currently different for each buffer/target? */
 760    GLboolean _BlendFuncPerBuffer;
 761    /** Are the blend equations currently different for each buffer/target? */
 762    GLboolean _BlendEquationPerBuffer;
 763    /*@}*/
 764
 765    /**
 766     * \name Logic op
 767     */
 768    /*@{*/
 769    GLenum LogicOp;                      /**< Logic operator */
 770    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 771    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 772    /*@}*/
 773
 774    GLboolean DitherFlag;                /**< Dither enable flag */
 775
 776    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 777    GLboolean _ClampFragmentColor; /** < with GL_FIXED_ONLY_ARB resolved */
 778    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 779    GLboolean _ClampReadColor;     /** < with GL_FIXED_ONLY_ARB resolved */
 780
 781    GLboolean sRGBEnabled;       /**< Framebuffer sRGB blending/updating requested */
 782 };
 783
 784
 785 /**
 786  * Current attribute group (GL_CURRENT_BIT).
 787  */
 788 struct gl_current_attrib
 789 {
 790    /**
 791     * \name Current vertex attributes.
 792     * \note Values are valid only after FLUSH_VERTICES has been called.
 793     * \note Index and Edgeflag current values are stored as floats in the
 794     * SIX and SEVEN attribute slots.
 795     */
 796    GLfloat Attrib[VERT_ATTRIB_MAX][4];  /**< Position, color, texcoords, etc */
 797
 798    /**
 799     * \name Current raster position attributes (always valid).
 800     * \note This set of attributes is very similar to the SWvertex struct.
 801     */
 802    /*@{*/
 803    GLfloat RasterPos[4];
 804    GLfloat RasterDistance;
 805    GLfloat RasterColor[4];
 806    GLfloat RasterSecondaryColor[4];
 807    GLfloat RasterTexCoords[MAX_TEXTURE_COORD_UNITS][4];
 808    GLboolean RasterPosValid;
 809    /*@}*/
 810 };
 811
 812
 813 /**
 814  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 815  */
 816 struct gl_depthbuffer_attrib
 817 {
 818    GLenum Func;                 /**< Function for depth buffer compare */
 819    GLclampd Clear;              /**< Value to clear depth buffer to */
 820    GLboolean Test;              /**< Depth buffering enabled flag */
 821    GLboolean Mask;              /**< Depth buffer writable? */
 822    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 823    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 824 };
 825
 826
 827 /**
 828  * Evaluator attribute group (GL_EVAL_BIT).
 829  */
 830 struct gl_eval_attrib
 831 {
 832    /**
 833     * \name Enable bits
 834     */
 835    /*@{*/
 836    GLboolean Map1Color4;
 837    GLboolean Map1Index;
 838    GLboolean Map1Normal;
 839    GLboolean Map1TextureCoord1;
 840    GLboolean Map1TextureCoord2;
 841    GLboolean Map1TextureCoord3;
 842    GLboolean Map1TextureCoord4;
 843    GLboolean Map1Vertex3;
 844    GLboolean Map1Vertex4;
 845    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 846    GLboolean Map2Color4;
 847    GLboolean Map2Index;
 848    GLboolean Map2Normal;
 849    GLboolean Map2TextureCoord1;
 850    GLboolean Map2TextureCoord2;
 851    GLboolean Map2TextureCoord3;
 852    GLboolean Map2TextureCoord4;
 853    GLboolean Map2Vertex3;
 854    GLboolean Map2Vertex4;
 855    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 856    GLboolean AutoNormal;
 857    /*@}*/
 858
 859    /**
 860     * \name Map Grid endpoints and divisions and calculated du values
 861     */
 862    /*@{*/
 863    GLint MapGrid1un;
 864    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 865    GLint MapGrid2un, MapGrid2vn;
 866    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 867    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 868    /*@}*/
 869 };
 870
 871
 872 /**
 873  * Fog attribute group (GL_FOG_BIT).
 874  */
 875 struct gl_fog_attrib
 876 {
 877    GLboolean Enabled;           /**< Fog enabled flag */
 878    GLfloat ColorUnclamped[4];            /**< Fog color */
 879    GLfloat Color[4];            /**< Fog color */
 880    GLfloat Density;             /**< Density >= 0.0 */
 881    GLfloat Start;               /**< Start distance in eye coords */
 882    GLfloat End;                 /**< End distance in eye coords */
 883    GLfloat Index;               /**< Fog index */
 884    GLenum Mode;                 /**< Fog mode */
 885    GLboolean ColorSumEnabled;
 886    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 887    GLfloat _Scale;              /**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
 888    GLenum FogDistanceMode;     /**< GL_NV_fog_distance */
 889 };
 890
 891
 892 /**
 893  * Hint attribute group (GL_HINT_BIT).
 894  *
 895  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 896  */
 897 struct gl_hint_attrib
 898 {
 899    GLenum PerspectiveCorrection;
 900    GLenum PointSmooth;
 901    GLenum LineSmooth;
 902    GLenum PolygonSmooth;
 903    GLenum Fog;
 904    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 905    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 906    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 907    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 908 };
 909
 910 /**
 911  * Light state flags.
 912  */
 913 /*@{*/
 914 #define LIGHT_SPOT         0x1
 915 #define LIGHT_LOCAL_VIEWER 0x2
 916 #define LIGHT_POSITIONAL   0x4
 917 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 918 /*@}*/
 919
 920
 921 /**
 922  * Lighting attribute group (GL_LIGHT_BIT).
 923  */
 924 struct gl_light_attrib
 925 {
 926    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 927    struct gl_lightmodel Model;          /**< Lighting model */
 928
 929    /**
 930     * Must flush FLUSH_VERTICES before referencing:
 931     */
 932    /*@{*/
 933    struct gl_material Material;         /**< Includes front & back values */
 934    /*@}*/
 935
 936    GLboolean Enabled;                   /**< Lighting enabled flag */
 937    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 938    GLenum ProvokingVertex;              /**< GL_EXT_provoking_vertex */
 939    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 940    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 941    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 942    GLboolean ColorMaterialEnabled;
 943    GLenum ClampVertexColor;
 944    GLboolean _ClampVertexColor;
 945
 946    struct gl_light EnabledList;         /**< List sentinel */
 947
 948    /**
 949     * Derived state for optimizations:
 950     */
 951    /*@{*/
 952    GLboolean _NeedEyeCoords;
 953    GLboolean _NeedVertices;             /**< Use fast shader? */
 954    GLfloat _BaseColor[2][3];
 955    /*@}*/
 956 };
 957
 958
 959 /**
 960  * Line attribute group (GL_LINE_BIT).
 961  */
 962 struct gl_line_attrib
 963 {
 964    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 965    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 966    GLushort StipplePattern;     /**< Stipple pattern */
 967    GLint StippleFactor;         /**< Stipple repeat factor */
 968    GLfloat Width;               /**< Line width */
 969 };
 970
 971
 972 /**
 973  * Display list attribute group (GL_LIST_BIT).
 974  */
 975 struct gl_list_attrib
 976 {
 977    GLuint ListBase;
 978 };
 979
 980
 981 /**
 982  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 983  */
 984 struct gl_multisample_attrib
 985 {
 986    GLboolean Enabled;
 987    GLboolean _Enabled;   /**< true if Enabled and multisample buffer */
 988    GLboolean SampleAlphaToCoverage;
 989    GLboolean SampleAlphaToOne;
 990    GLboolean SampleCoverage;
 991    GLfloat SampleCoverageValue;
 992    GLboolean SampleCoverageInvert;
 993 };
 994
 995
 996 /**
 997  * A pixelmap (see glPixelMap)
 998  */
 999 struct gl_pixelmap
1000 {
1001    GLint Size;
1002    GLfloat Map[MAX_PIXEL_MAP_TABLE];
1003 };
1004
1005
1006 /**
1007  * Collection of all pixelmaps
1008  */
1009 struct gl_pixelmaps
1010 {
1011    struct gl_pixelmap RtoR;  /**< i.e. GL_PIXEL_MAP_R_TO_R */
1012    struct gl_pixelmap GtoG;
1013    struct gl_pixelmap BtoB;
1014    struct gl_pixelmap AtoA;
1015    struct gl_pixelmap ItoR;
1016    struct gl_pixelmap ItoG;
1017    struct gl_pixelmap ItoB;
1018    struct gl_pixelmap ItoA;
1019    struct gl_pixelmap ItoI;
1020    struct gl_pixelmap StoS;
1021 };
1022
1023
1024 /**
1025  * Pixel attribute group (GL_PIXEL_MODE_BIT).
1026  */
1027 struct gl_pixel_attrib
1028 {
1029    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
1030
1031    /*--- Begin Pixel Transfer State ---*/
1032    /* Fields are in the order in which they're applied... */
1033
1034    /** Scale & Bias (index shift, offset) */
1035    /*@{*/
1036    GLfloat RedBias, RedScale;
1037    GLfloat GreenBias, GreenScale;
1038    GLfloat BlueBias, BlueScale;
1039    GLfloat AlphaBias, AlphaScale;
1040    GLfloat DepthBias, DepthScale;
1041    GLint IndexShift, IndexOffset;
1042    /*@}*/
1043
1044    /* Pixel Maps */
1045    /* Note: actual pixel maps are not part of this attrib group */
1046    GLboolean MapColorFlag;
1047    GLboolean MapStencilFlag;
1048
1049    /*--- End Pixel Transfer State ---*/
1050
1051    /** glPixelZoom */
1052    GLfloat ZoomX, ZoomY;
1053 };
1054
1055
1056 /**
1057  * Point attribute group (GL_POINT_BIT).
1058  */
1059 struct gl_point_attrib
1060 {
1061    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1062    GLfloat Size;                /**< User-specified point size */
1063    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1064    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1065    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1066    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1067    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
1068    GLboolean CoordReplace[MAX_TEXTURE_COORD_UNITS]; /**< GL_ARB_point_sprite*/
1069    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1070    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1071 };
1072
1073
1074 /**
1075  * Polygon attribute group (GL_POLYGON_BIT).
1076  */
1077 struct gl_polygon_attrib
1078 {
1079    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1080    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1081    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1082    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1083    GLboolean CullFlag;          /**< Culling on/off flag */
1084    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1085    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1086    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1087    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1088    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1089    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1090    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1091    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1092 };
1093
1094
1095 /**
1096  * Scissor attributes (GL_SCISSOR_BIT).
1097  */
1098 struct gl_scissor_attrib
1099 {
1100    GLboolean Enabled;           /**< Scissor test enabled? */
1101    GLint X, Y;                  /**< Lower left corner of box */
1102    GLsizei Width, Height;       /**< Size of box */
1103 };
1104
1105
1106 /**
1107  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1108  *
1109  * Three sets of stencil data are tracked so that OpenGL 2.0,
1110  * GL_EXT_stencil_two_side, and GL_ATI_separate_stencil can all be supported
1111  * simultaneously.  In each of the stencil state arrays, element 0 corresponds
1112  * to GL_FRONT.  Element 1 corresponds to the OpenGL 2.0 /
1113  * GL_ATI_separate_stencil GL_BACK state.  Element 2 corresponds to the
1114  * GL_EXT_stencil_two_side GL_BACK state.
1115  *
1116  * The derived value \c _BackFace is either 1 or 2 depending on whether or
1117  * not GL_STENCIL_TEST_TWO_SIDE_EXT is enabled.
1118  *
1119  * The derived value \c _TestTwoSide is set when the front-face and back-face
1120  * stencil state are different.
1121  */
1122 struct gl_stencil_attrib
1123 {
1124    GLboolean Enabled;           /**< Enabled flag */
1125    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1126    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 2) */
1127    GLboolean _Enabled;          /**< Enabled and stencil buffer present */
1128    GLboolean _TestTwoSide;
1129    GLubyte _BackFace;           /**< Current back stencil state (1 or 2) */
1130    GLenum Function[3];          /**< Stencil function */
1131    GLenum FailFunc[3];          /**< Fail function */
1132    GLenum ZPassFunc[3];         /**< Depth buffer pass function */
1133    GLenum ZFailFunc[3];         /**< Depth buffer fail function */
1134    GLint Ref[3];                /**< Reference value */
1135    GLuint ValueMask[3];         /**< Value mask */
1136    GLuint WriteMask[3];         /**< Write mask */
1137    GLuint Clear;                /**< Clear value */
1138 };
1139
1140
1141 /**
1142  * An index for each type of texture object.  These correspond to the GL
1143  * texture target enums, such as GL_TEXTURE_2D, GL_TEXTURE_CUBE_MAP, etc.
1144  * Note: the order is from highest priority to lowest priority.
1145  */
1146 typedef enum
1147 {
1148    TEXTURE_BUFFER_INDEX,
1149    TEXTURE_2D_ARRAY_INDEX,
1150    TEXTURE_1D_ARRAY_INDEX,
1151    TEXTURE_EXTERNAL_INDEX,
1152    TEXTURE_CUBE_INDEX,
1153    TEXTURE_3D_INDEX,
1154    TEXTURE_RECT_INDEX,
1155    TEXTURE_2D_INDEX,
1156    TEXTURE_1D_INDEX,
1157    NUM_TEXTURE_TARGETS
1158 } gl_texture_index;
1159
1160
1161 /**
1162  * Bit flags for each type of texture object
1163  * Used for Texture.Unit[]._ReallyEnabled flags.
1164  */
1165 /*@{*/
1166 #define TEXTURE_BUFFER_BIT   (1 << TEXTURE_BUFFER_INDEX)
1167 #define TEXTURE_2D_ARRAY_BIT (1 << TEXTURE_2D_ARRAY_INDEX)
1168 #define TEXTURE_1D_ARRAY_BIT (1 << TEXTURE_1D_ARRAY_INDEX)
1169 #define TEXTURE_EXTERNAL_BIT (1 << TEXTURE_EXTERNAL_INDEX)
1170 #define TEXTURE_CUBE_BIT     (1 << TEXTURE_CUBE_INDEX)
1171 #define TEXTURE_3D_BIT       (1 << TEXTURE_3D_INDEX)
1172 #define TEXTURE_RECT_BIT     (1 << TEXTURE_RECT_INDEX)
1173 #define TEXTURE_2D_BIT       (1 << TEXTURE_2D_INDEX)
1174 #define TEXTURE_1D_BIT       (1 << TEXTURE_1D_INDEX)
1175 /*@}*/
1176
1177
1178 /**
1179  * TexGenEnabled flags.
1180  */
1181 /*@{*/
1182 #define S_BIT 1
1183 #define T_BIT 2
1184 #define R_BIT 4
1185 #define Q_BIT 8
1186 #define STR_BITS (S_BIT | T_BIT | R_BIT)
1187 /*@}*/
1188
1189
1190 /**
1191  * Bit flag versions of the corresponding GL_ constants.
1192  */
1193 /*@{*/
1194 #define TEXGEN_SPHERE_MAP        0x1
1195 #define TEXGEN_OBJ_LINEAR        0x2
1196 #define TEXGEN_EYE_LINEAR        0x4
1197 #define TEXGEN_REFLECTION_MAP_NV 0x8
1198 #define TEXGEN_NORMAL_MAP_NV     0x10
1199
1200 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1201                                   TEXGEN_REFLECTION_MAP_NV | \
1202                                   TEXGEN_NORMAL_MAP_NV)
1203 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1204                                   TEXGEN_REFLECTION_MAP_NV | \
1205                                   TEXGEN_NORMAL_MAP_NV     | \
1206                                   TEXGEN_EYE_LINEAR)
1207 /*@}*/
1208
1209
1210
1211 /** Tex-gen enabled for texture unit? */
1212 #define ENABLE_TEXGEN(unit) (1 << (unit))
1213
1214 /** Non-identity texture matrix for texture unit? */
1215 #define ENABLE_TEXMAT(unit) (1 << (unit))
1216
1217
1218 /**
1219  * Texture image state.  Drivers will typically create a subclass of this
1220  * with extra fields for memory buffers, etc.
1221  */
1222 struct gl_texture_image
1223 {
1224    GLint InternalFormat;        /**< Internal format as given by the user */
1225    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1226                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1227                                  *   GL_INTENSITY, GL_DEPTH_COMPONENT or
1228                                  *   GL_DEPTH_STENCIL_EXT only. Used for
1229                                  *   choosing TexEnv arithmetic.
1230                                  */
1231    gl_format TexFormat;         /**< The actual texture memory format */
1232
1233    GLuint Border;               /**< 0 or 1 */
1234    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1235    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1236    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1237    GLuint Width2;               /**< = Width - 2*Border */
1238    GLuint Height2;              /**< = Height - 2*Border */
1239    GLuint Depth2;               /**< = Depth - 2*Border */
1240    GLuint WidthLog2;            /**< = log2(Width2) */
1241    GLuint HeightLog2;           /**< = log2(Height2) */
1242    GLuint DepthLog2;            /**< = log2(Depth2) */
1243    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1244
1245    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1246    GLuint Level;                /**< Which mipmap level am I? */
1247    /** Cube map face: index into gl_texture_object::Image[] array */
1248    GLuint Face;
1249 };
1250
1251
1252 /**
1253  * Indexes for cube map faces.
1254  */
1255 typedef enum
1256 {
1257    FACE_POS_X = 0,
1258    FACE_NEG_X = 1,
1259    FACE_POS_Y = 2,
1260    FACE_NEG_Y = 3,
1261    FACE_POS_Z = 4,
1262    FACE_NEG_Z = 5,
1263    MAX_FACES = 6
1264 } gl_face_index;
1265
1266
1267 /**
1268  * Sampler object state.  These objects are new with GL_ARB_sampler_objects
1269  * and OpenGL 3.3.  Legacy texture objects also contain a sampler object.
1270  */
1271 struct gl_sampler_object
1272 {
1273    GLuint Name;
1274    GLint RefCount;
1275
1276    GLenum WrapS;                /**< S-axis texture image wrap mode */
1277    GLenum WrapT;                /**< T-axis texture image wrap mode */
1278    GLenum WrapR;                /**< R-axis texture image wrap mode */
1279    GLenum MinFilter;            /**< minification filter */
1280    GLenum MagFilter;            /**< magnification filter */
1281    union gl_color_union BorderColor;  /**< Interpreted according to texture format */
1282    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1283    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1284    GLfloat LodBias;             /**< OpenGL 1.4 */
1285    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1286    GLenum CompareMode;          /**< GL_ARB_shadow */
1287    GLenum CompareFunc;          /**< GL_ARB_shadow */
1288    GLfloat CompareFailValue;    /**< GL_ARB_shadow_ambient */
1289    GLenum sRGBDecode;           /**< GL_DECODE_EXT or GL_SKIP_DECODE_EXT */
1290    GLboolean CubeMapSeamless;   /**< GL_AMD_seamless_cubemap_per_texture */
1291
1292    /* deprecated sampler state */
1293    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1294 };
1295
1296
1297 /**
1298  * Texture object state.  Contains the array of mipmap images, border color,
1299  * wrap modes, filter modes, and shadow/texcompare state.
1300  */
1301 struct gl_texture_object
1302 {
1303    _glthread_Mutex Mutex;       /**< for thread safety */
1304    GLint RefCount;              /**< reference count */
1305    GLuint Name;                 /**< the user-visible texture object ID */
1306    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1307
1308    struct gl_sampler_object Sampler;
1309
1310    GLfloat Priority;            /**< in [0,1] */
1311    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1312    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1313    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1314    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1315    GLint CropRect[4];           /**< GL_OES_draw_texture */
1316    GLenum Swizzle[4];           /**< GL_EXT_texture_swizzle */
1317    GLuint _Swizzle;             /**< same as Swizzle, but SWIZZLE_* format */
1318    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1319    GLboolean _Complete;         /**< Is texture object complete? */
1320    GLboolean _RenderToTexture;  /**< Any rendering to this texture? */
1321    GLboolean Purgeable;         /**< Is the buffer purgeable under memory pressure? */
1322    GLboolean Immutable;         /**< GL_ARB_texture_storage */
1323
1324    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1325    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1326
1327    /** GL_ARB_texture_buffer_object */
1328    struct gl_buffer_object *BufferObject;
1329    GLenum BufferObjectFormat;
1330
1331    /** GL_OES_EGL_image_external */
1332    GLint RequiredTextureImageUnits;
1333 };
1334
1335
1336 /** Up to four combiner sources are possible with GL_NV_texture_env_combine4 */
1337 #define MAX_COMBINER_TERMS 4
1338
1339
1340 /**
1341  * Texture combine environment state.
1342  */
1343 struct gl_tex_env_combine_state
1344 {
1345    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1346    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1347    /** Source terms: GL_PRIMARY_COLOR, GL_TEXTURE, etc */
1348    GLenum SourceRGB[MAX_COMBINER_TERMS];
1349    GLenum SourceA[MAX_COMBINER_TERMS];
1350    /** Source operands: GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR, etc */
1351    GLenum OperandRGB[MAX_COMBINER_TERMS];
1352    GLenum OperandA[MAX_COMBINER_TERMS];
1353    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1354    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1355    GLuint _NumArgsRGB;   /**< Number of inputs used for the RGB combiner */
1356    GLuint _NumArgsA;     /**< Number of inputs used for the A combiner */
1357 };
1358
1359
1360 /**
1361  * Texture coord generation state.
1362  */
1363 struct gl_texgen
1364 {
1365    GLenum Mode;         /**< GL_EYE_LINEAR, GL_SPHERE_MAP, etc */
1366    GLbitfield _ModeBit; /**< TEXGEN_x bit corresponding to Mode */
1367    GLfloat ObjectPlane[4];
1368    GLfloat EyePlane[4];
1369 };
1370
1371
1372 /**
1373  * Texture unit state.  Contains enable flags, texture environment/function/
1374  * combiners, texgen state, and pointers to current texture objects.
1375  */
1376 struct gl_texture_unit
1377 {
1378    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1379    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1380
1381    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1382    GLclampf EnvColor[4];
1383    GLfloat EnvColorUnclamped[4];
1384
1385    struct gl_texgen GenS;
1386    struct gl_texgen GenT;
1387    struct gl_texgen GenR;
1388    struct gl_texgen GenQ;
1389    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1390    GLbitfield _GenFlags;        /**< Bitwise-OR of Gen[STRQ]._ModeBit */
1391
1392    GLfloat LodBias;             /**< for biasing mipmap levels */
1393    GLenum BumpTarget;
1394    GLfloat RotMatrix[4]; /* 2x2 matrix */
1395
1396    /** Current sampler object (GL_ARB_sampler_objects) */
1397    struct gl_sampler_object *Sampler;
1398
1399    /**
1400     * \name GL_EXT_texture_env_combine
1401     */
1402    struct gl_tex_env_combine_state Combine;
1403
1404    /**
1405     * Derived state based on \c EnvMode and the \c BaseFormat of the
1406     * currently enabled texture.
1407     */
1408    struct gl_tex_env_combine_state _EnvMode;
1409
1410    /**
1411     * Currently enabled combiner state.  This will point to either
1412     * \c Combine or \c _EnvMode.
1413     */
1414    struct gl_tex_env_combine_state *_CurrentCombine;
1415
1416    /** Current texture object pointers */
1417    struct gl_texture_object *CurrentTex[NUM_TEXTURE_TARGETS];
1418
1419    /** Points to highest priority, complete and enabled texture object */
1420    struct gl_texture_object *_Current;
1421 };
1422
1423
1424 /**
1425  * Texture attribute group (GL_TEXTURE_BIT).
1426  */
1427 struct gl_texture_attrib
1428 {
1429    GLuint CurrentUnit;   /**< GL_ACTIVE_TEXTURE */
1430    struct gl_texture_unit Unit[MAX_COMBINED_TEXTURE_IMAGE_UNITS];
1431
1432    struct gl_texture_object *ProxyTex[NUM_TEXTURE_TARGETS];
1433
1434    /** GL_ARB_texture_buffer_object */
1435    struct gl_buffer_object *BufferObject;
1436
1437    /** GL_ARB_seamless_cubemap */
1438    GLboolean CubeMapSeamless;
1439
1440    /** Texture units/samplers used by vertex or fragment texturing */
1441    GLbitfield _EnabledUnits;
1442
1443    /** Texture coord units/sets used for fragment texturing */
1444    GLbitfield _EnabledCoordUnits;
1445
1446    /** Texture coord units that have texgen enabled */
1447    GLbitfield _TexGenEnabled;
1448
1449    /** Texture coord units that have non-identity matrices */
1450    GLbitfield _TexMatEnabled;
1451
1452    /** Bitwise-OR of all Texture.Unit[i]._GenFlags */
1453    GLbitfield _GenFlags;
1454 };
1455
1456
1457 /**
1458  * Data structure representing a single clip plane (e.g. one of the elements
1459  * of the ctx->Transform.EyeUserPlane or ctx->Transform._ClipUserPlane array).
1460  */
1461 typedef GLfloat gl_clip_plane[4];
1462
1463
1464 /**
1465  * Transformation attribute group (GL_TRANSFORM_BIT).
1466  */
1467 struct gl_transform_attrib
1468 {
1469    GLenum MatrixMode;                           /**< Matrix mode */
1470    gl_clip_plane EyeUserPlane[MAX_CLIP_PLANES]; /**< User clip planes */
1471    gl_clip_plane _ClipUserPlane[MAX_CLIP_PLANES]; /**< derived */
1472    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1473    GLboolean Normalize;                         /**< Normalize all normals? */
1474    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1475    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1476    GLboolean DepthClamp;                        /**< GL_ARB_depth_clamp */
1477
1478    GLfloat CullEyePos[4];
1479    GLfloat CullObjPos[4];
1480 };
1481
1482
1483 /**
1484  * Viewport attribute group (GL_VIEWPORT_BIT).
1485  */
1486 struct gl_viewport_attrib
1487 {
1488    GLint X, Y;                  /**< position */
1489    GLsizei Width, Height;       /**< size */
1490    GLfloat Near, Far;           /**< Depth buffer range */
1491    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1492 };
1493
1494
1495 /**
1496  * GL_ARB_vertex/pixel_buffer_object buffer object
1497  */
1498 struct gl_buffer_object
1499 {
1500    _glthread_Mutex Mutex;
1501    GLint RefCount;
1502    GLuint Name;
1503    GLenum Usage;        /**< GL_STREAM_DRAW_ARB, GL_STREAM_READ_ARB, etc. */
1504    GLsizeiptrARB Size;  /**< Size of buffer storage in bytes */
1505    GLubyte *Data;       /**< Location of storage either in RAM or VRAM. */
1506    /** Fields describing a mapped buffer */
1507    /*@{*/
1508    GLbitfield AccessFlags; /**< Mask of GL_MAP_x_BIT flags */
1509    GLvoid *Pointer;     /**< User-space address of mapping */
1510    GLintptr Offset;     /**< Mapped offset */
1511    GLsizeiptr Length;   /**< Mapped length */
1512    /*@}*/
1513    GLboolean DeletePending;   /**< true if buffer object is removed from the hash */
1514    GLboolean Written;   /**< Ever written to? (for debugging) */
1515    GLboolean Purgeable; /**< Is the buffer purgeable under memory pressure? */
1516 };
1517
1518
1519 /**
1520  * Client pixel packing/unpacking attributes
1521  */
1522 struct gl_pixelstore_attrib
1523 {
1524    GLint Alignment;
1525    GLint RowLength;
1526    GLint SkipPixels;
1527    GLint SkipRows;
1528    GLint ImageHeight;
1529    GLint SkipImages;
1530    GLboolean SwapBytes;
1531    GLboolean LsbFirst;
1532    GLboolean Invert;        /**< GL_MESA_pack_invert */
1533    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1534 };
1535
1536
1537 /**
1538  * Client vertex array attributes
1539  */
1540 struct gl_client_array
1541 {
1542    GLint Size;                  /**< components per element (1,2,3,4) */
1543    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1544    GLenum Format;               /**< default: GL_RGBA, but may be GL_BGRA */
1545    GLsizei Stride;              /**< user-specified stride */
1546    GLsizei StrideB;             /**< actual stride in bytes */
1547    const GLubyte *Ptr;          /**< Points to array data */
1548    GLboolean Enabled;           /**< Enabled flag is a boolean */
1549    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1550    GLboolean Integer;           /**< Integer-valued? */
1551    GLuint InstanceDivisor;      /**< GL_ARB_instanced_arrays */
1552    GLuint _ElementSize;         /**< size of each element in bytes */
1553
1554    struct gl_buffer_object *BufferObj;/**< GL_ARB_vertex_buffer_object */
1555    GLuint _MaxElement;          /**< max element index into array buffer + 1 */
1556 };
1557
1558
1559 /**
1560  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1561  * extension, but a nice encapsulation in any case.
1562  */
1563 struct gl_array_object
1564 {
1565    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1566    GLuint Name;
1567
1568    GLint RefCount;
1569    _glthread_Mutex Mutex;
1570
1571    /**
1572     * Does the VAO use ARB semantics or Apple semantics?
1573     *
1574     * There are several ways in which ARB_vertex_array_object and
1575     * APPLE_vertex_array_object VAOs have differing semantics.  At the very
1576     * least,
1577     *
1578     *     - ARB VAOs require that all array data be sourced from vertex buffer
1579     *       objects, but Apple VAOs do not.
1580     *
1581     *     - ARB VAOs require that names come from GenVertexArrays.
1582     *
1583     * This flag notes which behavior governs this VAO.
1584     */
1585    GLboolean ARBsemantics;
1586
1587    /**
1588     * Has this array object been bound?
1589     */
1590    GLboolean _Used;
1591
1592    /** Vertex attribute arrays */
1593    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1594
1595    /** Mask of VERT_BIT_* values indicating which arrays are enabled */
1596    GLbitfield64 _Enabled;
1597
1598    /**
1599     * Min of all enabled arrays' _MaxElement.  When arrays reside inside VBOs
1600     * we can determine the max legal (in bounds) glDrawElements array index.
1601     */
1602    GLuint _MaxElement;
1603
1604    struct gl_buffer_object *ElementArrayBufferObj;
1605 };
1606
1607
1608 /**
1609  * Vertex array state
1610  */
1611 struct gl_array_attrib
1612 {
1613    /** Currently bound array object. See _mesa_BindVertexArrayAPPLE() */
1614    struct gl_array_object *ArrayObj;
1615
1616    /** The default vertex array object */
1617    struct gl_array_object *DefaultArrayObj;
1618
1619    /** Array objects (GL_ARB/APPLE_vertex_array_object) */
1620    struct _mesa_HashTable *Objects;
1621
1622    GLint ActiveTexture;         /**< Client Active Texture */
1623    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1624    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1625
1626    /** GL 3.1 (slightly different from GL_NV_primitive_restart) */
1627    GLboolean PrimitiveRestart;
1628    GLuint RestartIndex;
1629
1630    GLbitfield64 NewState;               /**< mask of VERT_BIT_* values */
1631    GLboolean RebindArrays; /**< whether the VBO module should rebind arrays */
1632
1633    /* GL_ARB_vertex_buffer_object */
1634    struct gl_buffer_object *ArrayBufferObj;
1635 };
1636
1637
1638 /**
1639  * Feedback buffer state
1640  */
1641 struct gl_feedback
1642 {
1643    GLenum Type;
1644    GLbitfield _Mask;    /**< FB_* bits */
1645    GLfloat *Buffer;
1646    GLuint BufferSize;
1647    GLuint Count;
1648 };
1649
1650
1651 /**
1652  * Selection buffer state
1653  */
1654 struct gl_selection
1655 {
1656    GLuint *Buffer;      /**< selection buffer */
1657    GLuint BufferSize;   /**< size of the selection buffer */
1658    GLuint BufferCount;  /**< number of values in the selection buffer */
1659    GLuint Hits;         /**< number of records in the selection buffer */
1660    GLuint NameStackDepth; /**< name stack depth */
1661    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1662    GLboolean HitFlag;   /**< hit flag */
1663    GLfloat HitMinZ;     /**< minimum hit depth */
1664    GLfloat HitMaxZ;     /**< maximum hit depth */
1665 };
1666
1667
1668 /**
1669  * 1-D Evaluator control points
1670  */
1671 struct gl_1d_map
1672 {
1673    GLuint Order;        /**< Number of control points */
1674    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1675    GLfloat *Points;     /**< Points to contiguous control points */
1676 };
1677
1678
1679 /**
1680  * 2-D Evaluator control points
1681  */
1682 struct gl_2d_map
1683 {
1684    GLuint Uorder;               /**< Number of control points in U dimension */
1685    GLuint Vorder;               /**< Number of control points in V dimension */
1686    GLfloat u1, u2, du;
1687    GLfloat v1, v2, dv;
1688    GLfloat *Points;             /**< Points to contiguous control points */
1689 };
1690
1691
1692 /**
1693  * All evaluator control point state
1694  */
1695 struct gl_evaluators
1696 {
1697    /**
1698     * \name 1-D maps
1699     */
1700    /*@{*/
1701    struct gl_1d_map Map1Vertex3;
1702    struct gl_1d_map Map1Vertex4;
1703    struct gl_1d_map Map1Index;
1704    struct gl_1d_map Map1Color4;
1705    struct gl_1d_map Map1Normal;
1706    struct gl_1d_map Map1Texture1;
1707    struct gl_1d_map Map1Texture2;
1708    struct gl_1d_map Map1Texture3;
1709    struct gl_1d_map Map1Texture4;
1710    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1711    /*@}*/
1712
1713    /**
1714     * \name 2-D maps
1715     */
1716    /*@{*/
1717    struct gl_2d_map Map2Vertex3;
1718    struct gl_2d_map Map2Vertex4;
1719    struct gl_2d_map Map2Index;
1720    struct gl_2d_map Map2Color4;
1721    struct gl_2d_map Map2Normal;
1722    struct gl_2d_map Map2Texture1;
1723    struct gl_2d_map Map2Texture2;
1724    struct gl_2d_map Map2Texture3;
1725    struct gl_2d_map Map2Texture4;
1726    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1727    /*@}*/
1728 };
1729
1730
1731 struct gl_transform_feedback_varying_info
1732 {
1733    char *Name;
1734    GLenum Type;
1735    GLint Size;
1736 };
1737
1738
1739 /**
1740  * Per-output info vertex shaders for transform feedback.
1741  */
1742 struct gl_transform_feedback_output
1743 {
1744    unsigned OutputRegister;
1745    unsigned OutputBuffer;
1746    unsigned NumComponents;
1747
1748    /** offset (in DWORDs) of this output within the interleaved structure */
1749    unsigned DstOffset;
1750
1751    /**
1752     * Offset into the output register of the data to output.  For example,
1753     * if NumComponents is 2 and ComponentOffset is 1, then the data to
1754     * offset is in the y and z components of the output register.
1755     */
1756    unsigned ComponentOffset;
1757 };
1758
1759
1760 /** Post-link transform feedback info. */
1761 struct gl_transform_feedback_info
1762 {
1763    unsigned NumOutputs;
1764
1765    /**
1766     * Number of transform feedback buffers in use by this program.
1767     */
1768    unsigned NumBuffers;
1769
1770    struct gl_transform_feedback_output *Outputs;
1771
1772    /** Transform feedback varyings used for the linking of this shader program.
1773     *
1774     * Use for glGetTransformFeedbackVarying().
1775     */
1776    struct gl_transform_feedback_varying_info *Varyings;
1777    GLint NumVarying;
1778
1779    /**
1780     * Total number of components stored in each buffer.  This may be used by
1781     * hardware back-ends to determine the correct stride when interleaving
1782     * multiple transform feedback outputs in the same buffer.
1783     */
1784    unsigned BufferStride[MAX_FEEDBACK_ATTRIBS];
1785 };
1786
1787
1788 /**
1789  * Transform feedback object state
1790  */
1791 struct gl_transform_feedback_object
1792 {
1793    GLuint Name;  /**< AKA the object ID */
1794    GLint RefCount;
1795    GLboolean Active;  /**< Is transform feedback enabled? */
1796    GLboolean Paused;  /**< Is transform feedback paused? */
1797    GLboolean EndedAnytime; /**< Has EndTransformFeedback been called
1798                                 at least once? */
1799
1800    /** The feedback buffers */
1801    GLuint BufferNames[MAX_FEEDBACK_ATTRIBS];
1802    struct gl_buffer_object *Buffers[MAX_FEEDBACK_ATTRIBS];
1803
1804    /** Start of feedback data in dest buffer */
1805    GLintptr Offset[MAX_FEEDBACK_ATTRIBS];
1806    /** Max data to put into dest buffer (in bytes) */
1807    GLsizeiptr Size[MAX_FEEDBACK_ATTRIBS];
1808 };
1809
1810
1811 /**
1812  * Context state for transform feedback.
1813  */
1814 struct gl_transform_feedback_state
1815 {
1816    GLenum Mode;       /**< GL_POINTS, GL_LINES or GL_TRIANGLES */
1817
1818    /** The general binding point (GL_TRANSFORM_FEEDBACK_BUFFER) */
1819    struct gl_buffer_object *CurrentBuffer;
1820
1821    /** The table of all transform feedback objects */
1822    struct _mesa_HashTable *Objects;
1823
1824    /** The current xform-fb object (GL_TRANSFORM_FEEDBACK_BINDING) */
1825    struct gl_transform_feedback_object *CurrentObject;
1826
1827    /** The default xform-fb object (Name==0) */
1828    struct gl_transform_feedback_object *DefaultObject;
1829 };
1830
1831
1832 /**
1833  * Names of the various vertex/fragment program register files, etc.
1834  *
1835  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1836  * All values should fit in a 4-bit field.
1837  *
1838  * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
1839  * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
1840  * be "uniform" variables since they can only be set outside glBegin/End.
1841  * They're also all stored in the same Parameters array.
1842  */
1843 typedef enum
1844 {
1845    PROGRAM_TEMPORARY,   /**< machine->Temporary[] */
1846    PROGRAM_INPUT,       /**< machine->Inputs[] */
1847    PROGRAM_OUTPUT,      /**< machine->Outputs[] */
1848    PROGRAM_VARYING,     /**< machine->Inputs[]/Outputs[] */
1849    PROGRAM_LOCAL_PARAM, /**< gl_program->LocalParams[] */
1850    PROGRAM_ENV_PARAM,   /**< gl_program->Parameters[] */
1851    PROGRAM_STATE_VAR,   /**< gl_program->Parameters[] */
1852    PROGRAM_NAMED_PARAM, /**< gl_program->Parameters[] */
1853    PROGRAM_CONSTANT,    /**< gl_program->Parameters[] */
1854    PROGRAM_UNIFORM,     /**< gl_program->Parameters[] */
1855    PROGRAM_WRITE_ONLY,  /**< A dummy, write-only register */
1856    PROGRAM_ADDRESS,     /**< machine->AddressReg */
1857    PROGRAM_SAMPLER,     /**< for shader samplers, compile-time only */
1858    PROGRAM_SYSTEM_VALUE,/**< InstanceId, PrimitiveID, etc. */
1859    PROGRAM_UNDEFINED,   /**< Invalid/TBD value */
1860    PROGRAM_FILE_MAX
1861 } gl_register_file;
1862
1863
1864 /**
1865  * If the register file is PROGRAM_SYSTEM_VALUE, the register index will be
1866  * one of these values.
1867  */
1868 typedef enum
1869 {
1870    SYSTEM_VALUE_FRONT_FACE,  /**< Fragment shader only (not done yet) */
1871    SYSTEM_VALUE_VERTEX_ID,   /**< Vertex shader only */
1872    SYSTEM_VALUE_INSTANCE_ID, /**< Vertex shader only */
1873    SYSTEM_VALUE_MAX          /**< Number of values */
1874 } gl_system_value;
1875
1876
1877 /**
1878  * The possible interpolation qualifiers that can be applied to a fragment
1879  * shader input in GLSL.
1880  *
1881  * Note: INTERP_QUALIFIER_NONE must be 0 so that memsetting the
1882  * gl_fragment_program data structure to 0 causes the default behavior.
1883  */
1884 enum glsl_interp_qualifier
1885 {
1886    INTERP_QUALIFIER_NONE = 0,
1887    INTERP_QUALIFIER_SMOOTH,
1888    INTERP_QUALIFIER_FLAT,
1889    INTERP_QUALIFIER_NOPERSPECTIVE
1890 };
1891
1892
1893 /**
1894  * \brief Layout qualifiers for gl_FragDepth.
1895  *
1896  * Extension AMD_conservative_depth allows gl_FragDepth to be redeclared with
1897  * a layout qualifier.
1898  *
1899  * \see enum ir_depth_layout
1900  */
1901 enum gl_frag_depth_layout
1902 {
1903    FRAG_DEPTH_LAYOUT_NONE, /**< No layout is specified. */
1904    FRAG_DEPTH_LAYOUT_ANY,
1905    FRAG_DEPTH_LAYOUT_GREATER,
1906    FRAG_DEPTH_LAYOUT_LESS,
1907    FRAG_DEPTH_LAYOUT_UNCHANGED
1908 };
1909
1910
1911 /**
1912  * Base class for any kind of program object
1913  */
1914 struct gl_program
1915 {
1916    GLuint Id;
1917    GLubyte *String;  /**< Null-terminated program text */
1918    GLint RefCount;
1919    GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
1920    GLenum Format;    /**< String encoding format */
1921    GLboolean Resident;
1922
1923    struct prog_instruction *Instructions;
1924
1925    GLbitfield64 InputsRead;     /**< Bitmask of which input regs are read */
1926    GLbitfield64 OutputsWritten; /**< Bitmask of which output regs are written */
1927    GLbitfield SystemValuesRead;   /**< Bitmask of SYSTEM_VALUE_x inputs used */
1928    GLbitfield InputFlags[MAX_PROGRAM_INPUTS];   /**< PROG_PARAM_BIT_x flags */
1929    GLbitfield OutputFlags[MAX_PROGRAM_OUTPUTS]; /**< PROG_PARAM_BIT_x flags */
1930    GLbitfield TexturesUsed[MAX_COMBINED_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1931    GLbitfield SamplersUsed;   /**< Bitfield of which samplers are used */
1932    GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */
1933
1934
1935    /** Named parameters, constants, etc. from program text */
1936    struct gl_program_parameter_list *Parameters;
1937    /** Numbered local parameters */
1938    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1939
1940    /** Map from sampler unit to texture unit (set by glUniform1i()) */
1941    GLubyte SamplerUnits[MAX_SAMPLERS];
1942
1943    /** Bitmask of which register files are read/written with indirect
1944     * addressing.  Mask of (1 << PROGRAM_x) bits.
1945     */
1946    GLbitfield IndirectRegisterFiles;
1947
1948    /** Logical counts */
1949    /*@{*/
1950    GLuint NumInstructions;
1951    GLuint NumTemporaries;
1952    GLuint NumParameters;
1953    GLuint NumAttributes;
1954    GLuint NumAddressRegs;
1955    GLuint NumAluInstructions;
1956    GLuint NumTexInstructions;
1957    GLuint NumTexIndirections;
1958    /*@}*/
1959    /** Native, actual h/w counts */
1960    /*@{*/
1961    GLuint NumNativeInstructions;
1962    GLuint NumNativeTemporaries;
1963    GLuint NumNativeParameters;
1964    GLuint NumNativeAttributes;
1965    GLuint NumNativeAddressRegs;
1966    GLuint NumNativeAluInstructions;
1967    GLuint NumNativeTexInstructions;
1968    GLuint NumNativeTexIndirections;
1969    /*@}*/
1970 };
1971
1972
1973 /** Vertex program object */
1974 struct gl_vertex_program
1975 {
1976    struct gl_program Base;   /**< base class */
1977    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1978    GLboolean IsPositionInvariant;
1979    GLboolean UsesClipDistance;
1980 };
1981
1982
1983 /** Geometry program object */
1984 struct gl_geometry_program
1985 {
1986    struct gl_program Base;   /**< base class */
1987
1988    GLint VerticesOut;
1989    GLenum InputType;  /**< GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_ARB,
1990                            GL_TRIANGLES, or GL_TRIANGLES_ADJACENCY_ARB */
1991    GLenum OutputType; /**< GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP */
1992 };
1993
1994
1995 /** Fragment program object */
1996 struct gl_fragment_program
1997 {
1998    struct gl_program Base;   /**< base class */
1999    GLboolean UsesKill;          /**< shader uses KIL instruction */
2000    GLboolean OriginUpperLeft;
2001    GLboolean PixelCenterInteger;
2002    enum gl_frag_depth_layout FragDepthLayout;
2003
2004    /**
2005     * GLSL interpolation qualifier associated with each fragment shader input.
2006     * For inputs that do not have an interpolation qualifier specified in
2007     * GLSL, the value is INTERP_QUALIFIER_NONE.
2008     */
2009    enum glsl_interp_qualifier InterpQualifier[FRAG_ATTRIB_MAX];
2010 };
2011
2012
2013 /**
2014  * State common to vertex and fragment programs.
2015  */
2016 struct gl_program_state
2017 {
2018    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
2019    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
2020 };
2021
2022
2023 /**
2024  * Context state for vertex programs.
2025  */
2026 struct gl_vertex_program_state
2027 {
2028    GLboolean Enabled;            /**< User-set GL_VERTEX_PROGRAM_ARB/NV flag */
2029    GLboolean _Enabled;           /**< Enabled and _valid_ user program? */
2030    GLboolean PointSizeEnabled;   /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
2031    GLboolean TwoSideEnabled;     /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
2032    /** Computed two sided lighting for fixed function/programs. */
2033    GLboolean _TwoSideEnabled;
2034    struct gl_vertex_program *Current;  /**< User-bound vertex program */
2035
2036    /** Currently enabled and valid vertex program (including internal
2037     * programs, user-defined vertex programs and GLSL vertex shaders).
2038     * This is the program we must use when rendering.
2039     */
2040    struct gl_vertex_program *_Current;
2041
2042    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
2043
2044    /* For GL_NV_vertex_program only: */
2045    GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
2046    GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];
2047
2048    /** Should fixed-function T&L be implemented with a vertex prog? */
2049    GLboolean _MaintainTnlProgram;
2050
2051    /** Program to emulate fixed-function T&L (see above) */
2052    struct gl_vertex_program *_TnlProgram;
2053
2054    /** Cache of fixed-function programs */
2055    struct gl_program_cache *Cache;
2056
2057    GLboolean _Overriden;
2058 };
2059
2060
2061 /**
2062  * Context state for geometry programs.
2063  */
2064 struct gl_geometry_program_state
2065 {
2066    GLboolean Enabled;               /**< GL_ARB_GEOMETRY_SHADER4 */
2067    GLboolean _Enabled;              /**< Enabled and valid program? */
2068    struct gl_geometry_program *Current;  /**< user-bound geometry program */
2069
2070    /** Currently enabled and valid program (including internal programs
2071     * and compiled shader programs).
2072     */
2073    struct gl_geometry_program *_Current;
2074
2075    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
2076
2077    /** Cache of fixed-function programs */
2078    struct gl_program_cache *Cache;
2079 };
2080
2081 /**
2082  * Context state for fragment programs.
2083  */
2084 struct gl_fragment_program_state
2085 {
2086    GLboolean Enabled;     /**< User-set fragment program enable flag */
2087    GLboolean _Enabled;    /**< Enabled and _valid_ user program? */
2088    struct gl_fragment_program *Current;  /**< User-bound fragment program */
2089
2090    /** Currently enabled and valid fragment program (including internal
2091     * programs, user-defined fragment programs and GLSL fragment shaders).
2092     * This is the program we must use when rendering.
2093     */
2094    struct gl_fragment_program *_Current;
2095
2096    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
2097
2098    /** Should fixed-function texturing be implemented with a fragment prog? */
2099    GLboolean _MaintainTexEnvProgram;
2100
2101    /** Program to emulate fixed-function texture env/combine (see above) */
2102    struct gl_fragment_program *_TexEnvProgram;
2103
2104    /** Cache of fixed-function programs */
2105    struct gl_program_cache *Cache;
2106 };
2107
2108
2109 /**
2110  * ATI_fragment_shader runtime state
2111  */
2112 #define ATI_FS_INPUT_PRIMARY 0
2113 #define ATI_FS_INPUT_SECONDARY 1
2114
2115 struct atifs_instruction;
2116 struct atifs_setupinst;
2117
2118 /**
2119  * ATI fragment shader
2120  */
2121 struct ati_fragment_shader
2122 {
2123    GLuint Id;
2124    GLint RefCount;
2125    struct atifs_instruction *Instructions[2];
2126    struct atifs_setupinst *SetupInst[2];
2127    GLfloat Constants[8][4];
2128    GLbitfield LocalConstDef;  /**< Indicates which constants have been set */
2129    GLubyte numArithInstr[2];
2130    GLubyte regsAssigned[2];
2131    GLubyte NumPasses;         /**< 1 or 2 */
2132    GLubyte cur_pass;
2133    GLubyte last_optype;
2134    GLboolean interpinp1;
2135    GLboolean isValid;
2136    GLuint swizzlerq;
2137 };
2138
2139 /**
2140  * Context state for GL_ATI_fragment_shader
2141  */
2142 struct gl_ati_fragment_shader_state
2143 {
2144    GLboolean Enabled;
2145    GLboolean _Enabled;                  /**< enabled and valid shader? */
2146    GLboolean Compiling;
2147    GLfloat GlobalConstants[8][4];
2148    struct ati_fragment_shader *Current;
2149 };
2150
2151
2152 /** Set by #pragma directives */
2153 struct gl_sl_pragmas
2154 {
2155    GLboolean IgnoreOptimize;  /**< ignore #pragma optimize(on/off) ? */
2156    GLboolean IgnoreDebug;     /**< ignore #pragma debug(on/off) ? */
2157    GLboolean Optimize;  /**< defaults on */
2158    GLboolean Debug;     /**< defaults off */
2159 };
2160
2161
2162 /**
2163  * A GLSL vertex or fragment shader object.
2164  */
2165 struct gl_shader
2166 {
2167    GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER || GL_GEOMETRY_SHADER_ARB (first field!) */
2168    GLuint Name;  /**< AKA the handle */
2169    GLint RefCount;  /**< Reference count */
2170    GLboolean DeletePending;
2171    GLboolean CompileStatus;
2172    const GLchar *Source;  /**< Source code string */
2173    GLuint SourceChecksum;       /**< for debug/logging purposes */
2174    struct gl_program *Program;  /**< Post-compile assembly code */
2175    GLchar *InfoLog;
2176    struct gl_sl_pragmas Pragmas;
2177
2178    unsigned Version;       /**< GLSL version used for linking */
2179
2180    /**
2181     * \name Sampler tracking
2182     *
2183     * \note Each of these fields is only set post-linking.
2184     */
2185    /*@{*/
2186    unsigned num_samplers;       /**< Number of samplers used by this shader. */
2187    GLbitfield active_samplers;  /**< Bitfield of which samplers are used */
2188    GLbitfield shadow_samplers;  /**< Samplers used for shadow sampling. */
2189    /*@}*/
2190
2191    /**
2192     * Number of uniform components used by this shader.
2193     *
2194     * This field is only set post-linking.
2195     */
2196    unsigned num_uniform_components;
2197
2198    struct exec_list *ir;
2199    struct glsl_symbol_table *symbols;
2200
2201    /** Shaders containing built-in functions that are used for linking. */
2202    struct gl_shader *builtins_to_link[16];
2203    unsigned num_builtins_to_link;
2204 };
2205
2206
2207 /**
2208  * Shader stages. Note that these will become 5 with tessellation.
2209  * These MUST have the same values as gallium's PIPE_SHADER_*
2210  */
2211 typedef enum
2212 {
2213    MESA_SHADER_VERTEX = 0,
2214    MESA_SHADER_FRAGMENT = 1,
2215    MESA_SHADER_GEOMETRY = 2,
2216    MESA_SHADER_TYPES = 3
2217 } gl_shader_type;
2218
2219
2220 /**
2221  * A GLSL program object.
2222  * Basically a linked collection of vertex and fragment shaders.
2223  */
2224 struct gl_shader_program
2225 {
2226    GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
2227    GLuint Name;  /**< aka handle or ID */
2228    GLint RefCount;  /**< Reference count */
2229    GLboolean DeletePending;
2230
2231    /**
2232     * Flags that the linker should not reject the program if it lacks
2233     * a vertex or fragment shader.  GLES2 doesn't allow separate
2234     * shader objects, and would reject them.  However, we internally
2235     * build separate shader objects for fixed function programs, which
2236     * we use for drivers/common/meta.c and for handling
2237     * _mesa_update_state with no program bound (for example in
2238     * glClear()).
2239     */
2240    GLboolean InternalSeparateShader;
2241
2242    GLuint NumShaders;          /**< number of attached shaders */
2243    struct gl_shader **Shaders; /**< List of attached the shaders */
2244
2245    /**
2246     * User-defined attribute bindings
2247     *
2248     * These are set via \c glBindAttribLocation and are used to direct the
2249     * GLSL linker.  These are \b not the values used in the compiled shader,
2250     * and they are \b not the values returned by \c glGetAttribLocation.
2251     */
2252    struct string_to_uint_map *AttributeBindings;
2253
2254    /**
2255     * User-defined fragment data bindings
2256     *
2257     * These are set via \c glBindFragDataLocation and are used to direct the
2258     * GLSL linker.  These are \b not the values used in the compiled shader,
2259     * and they are \b not the values returned by \c glGetFragDataLocation.
2260     */
2261    struct string_to_uint_map *FragDataBindings;
2262
2263    /**
2264     * Transform feedback varyings last specified by
2265     * glTransformFeedbackVaryings().
2266     *
2267     * For the current set of transform feeedback varyings used for transform
2268     * feedback output, see LinkedTransformFeedback.
2269     */
2270    struct {
2271       GLenum BufferMode;
2272       GLuint NumVarying;
2273       GLchar **VaryingNames;  /**< Array [NumVarying] of char * */
2274    } TransformFeedback;
2275
2276    /** Post-link transform feedback info. */
2277    struct gl_transform_feedback_info LinkedTransformFeedback;
2278
2279    /** Post-link gl_FragDepth layout for ARB_conservative_depth. */
2280    enum gl_frag_depth_layout FragDepthLayout;
2281
2282    /** Geometry shader state - copied into gl_geometry_program at link time */
2283    struct {
2284       GLint VerticesOut;
2285       GLenum InputType;  /**< GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_ARB,
2286                               GL_TRIANGLES, or GL_TRIANGLES_ADJACENCY_ARB */
2287       GLenum OutputType; /**< GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP */
2288    } Geom;
2289
2290    /** Vertex shader state - copied into gl_vertex_program at link time */
2291    struct {
2292       GLboolean UsesClipDistance; /**< True if gl_ClipDistance is written to. */
2293       GLuint ClipDistanceArraySize; /**< Size of the gl_ClipDistance array, or
2294                                          0 if not present. */
2295    } Vert;
2296
2297    /* post-link info: */
2298    unsigned NumUserUniformStorage;
2299    struct gl_uniform_storage *UniformStorage;
2300
2301    /**
2302     * Map of active uniform names to locations
2303     *
2304     * Maps any active uniform that is not an array element to a location.
2305     * Each active uniform, including individual structure members will appear
2306     * in this map.  This roughly corresponds to the set of names that would be
2307     * enumerated by \c glGetActiveUniform.
2308     */
2309    struct string_to_uint_map *UniformHash;
2310
2311    /**
2312     * Map from sampler unit to texture unit (set by glUniform1i())
2313     *
2314     * A sampler unit is associated with each sampler uniform by the linker.
2315     * The sampler unit associated with each uniform is stored in the
2316     * \c gl_uniform_storage::sampler field.
2317     */
2318    GLubyte SamplerUnits[MAX_SAMPLERS];
2319    /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
2320    gl_texture_index SamplerTargets[MAX_SAMPLERS];
2321
2322    GLboolean LinkStatus;   /**< GL_LINK_STATUS */
2323    GLboolean Validated;
2324    GLboolean _Used;        /**< Ever used for drawing? */
2325    GLchar *InfoLog;
2326
2327    unsigned Version;       /**< GLSL version used for linking */
2328
2329    /**
2330     * Per-stage shaders resulting from the first stage of linking.
2331     *
2332     * Set of linked shaders for this program.  The array is accessed using the
2333     * \c MESA_SHADER_* defines.  Entries for non-existent stages will be
2334     * \c NULL.
2335     */
2336    struct gl_shader *_LinkedShaders[MESA_SHADER_TYPES];
2337 };
2338
2339
2340 #define GLSL_DUMP      0x1  /**< Dump shaders to stdout */
2341 #define GLSL_LOG       0x2  /**< Write shaders to files */
2342 #define GLSL_OPT       0x4  /**< Force optimizations (override pragmas) */
2343 #define GLSL_NO_OPT    0x8  /**< Force no optimizations (override pragmas) */
2344 #define GLSL_UNIFORMS 0x10  /**< Print glUniform calls */
2345 #define GLSL_NOP_VERT 0x20  /**< Force no-op vertex shaders */
2346 #define GLSL_NOP_FRAG 0x40  /**< Force no-op fragment shaders */
2347 #define GLSL_USE_PROG 0x80  /**< Log glUseProgram calls */
2348
2349
2350 /**
2351  * Context state for GLSL vertex/fragment shaders.
2352  */
2353 struct gl_shader_state
2354 {
2355    /**
2356     * Programs used for rendering
2357     *
2358     * There is a separate program set for each shader stage.  If
2359     * GL_EXT_separate_shader_objects is not supported, each of these must point
2360     * to \c NULL or to the same program.
2361     */
2362    struct gl_shader_program *CurrentVertexProgram;
2363    struct gl_shader_program *CurrentGeometryProgram;
2364    struct gl_shader_program *CurrentFragmentProgram;
2365
2366    struct gl_shader_program *_CurrentFragmentProgram;
2367
2368    /**
2369     * Program used by glUniform calls.
2370     *
2371     * Explicitly set by \c glUseProgram and \c glActiveProgramEXT.
2372     */
2373    struct gl_shader_program *ActiveProgram;
2374
2375    GLbitfield Flags;                    /**< Mask of GLSL_x flags */
2376 };
2377
2378
2379 /**
2380  * Compiler options for a single GLSL shaders type
2381  */
2382 struct gl_shader_compiler_options
2383 {
2384    /** Driver-selectable options: */
2385    GLboolean EmitCondCodes;             /**< Use condition codes? */
2386    GLboolean EmitNVTempInitialization;  /**< 0-fill NV temp registers */
2387    GLboolean EmitNoLoops;
2388    GLboolean EmitNoFunctions;
2389    GLboolean EmitNoCont;                  /**< Emit CONT opcode? */
2390    GLboolean EmitNoMainReturn;            /**< Emit CONT/RET opcodes? */
2391    GLboolean EmitNoNoise;                 /**< Emit NOISE opcodes? */
2392    GLboolean EmitNoPow;                   /**< Emit POW opcodes? */
2393    GLboolean LowerClipDistance; /**< Lower gl_ClipDistance from float[8] to vec4[2]? */
2394
2395    /**
2396     * \name Forms of indirect addressing the driver cannot do.
2397     */
2398    /*@{*/
2399    GLboolean EmitNoIndirectInput;   /**< No indirect addressing of inputs */
2400    GLboolean EmitNoIndirectOutput;  /**< No indirect addressing of outputs */
2401    GLboolean EmitNoIndirectTemp;    /**< No indirect addressing of temps */
2402    GLboolean EmitNoIndirectUniform; /**< No indirect addressing of constants */
2403    /*@}*/
2404
2405    GLuint MaxIfDepth;               /**< Maximum nested IF blocks */
2406    GLuint MaxUnrollIterations;
2407
2408    struct gl_sl_pragmas DefaultPragmas; /**< Default #pragma settings */
2409 };
2410
2411
2412 /**
2413  * Occlusion/timer query object.
2414  */
2415 struct gl_query_object
2416 {
2417    GLenum Target;      /**< The query target, when active */
2418    GLuint Id;          /**< hash table ID/name */
2419    GLuint64EXT Result; /**< the counter */
2420    GLboolean Active;   /**< inside Begin/EndQuery */
2421    GLboolean Ready;    /**< result is ready? */
2422 };
2423
2424
2425 /**
2426  * Context state for query objects.
2427  */
2428 struct gl_query_state
2429 {
2430    struct _mesa_HashTable *QueryObjects;
2431    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2432    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2433
2434    /** GL_NV_conditional_render */
2435    struct gl_query_object *CondRenderQuery;
2436
2437    /** GL_EXT_transform_feedback */
2438    struct gl_query_object *PrimitivesGenerated;
2439    struct gl_query_object *PrimitivesWritten;
2440
2441    /** GL_ARB_timer_query */
2442    struct gl_query_object *TimeElapsed;
2443
2444    GLenum CondRenderMode;
2445 };
2446
2447
2448 /** Sync object state */
2449 struct gl_sync_object
2450 {
2451    struct simple_node link;
2452    GLenum Type;               /**< GL_SYNC_FENCE */
2453    GLuint Name;               /**< Fence name */
2454    GLint RefCount;            /**< Reference count */
2455    GLboolean DeletePending;   /**< Object was deleted while there were still
2456                                * live references (e.g., sync not yet finished)
2457                                */
2458    GLenum SyncCondition;
2459    GLbitfield Flags;          /**< Flags passed to glFenceSync */
2460    GLuint StatusFlag:1;       /**< Has the sync object been signaled? */
2461 };
2462
2463
2464 /**
2465  * State which can be shared by multiple contexts:
2466  */
2467 struct gl_shared_state
2468 {
2469    _glthread_Mutex Mutex;                  /**< for thread safety */
2470    GLint RefCount;                         /**< Reference count */
2471    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2472    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2473
2474    /** Default texture objects (shared by all texture units) */
2475    struct gl_texture_object *DefaultTex[NUM_TEXTURE_TARGETS];
2476
2477    /** Fallback texture used when a bound texture is incomplete */
2478    struct gl_texture_object *FallbackTex[NUM_TEXTURE_TARGETS];
2479
2480    /**
2481     * \name Thread safety and statechange notification for texture
2482     * objects.
2483     *
2484     * \todo Improve the granularity of locking.
2485     */
2486    /*@{*/
2487    _glthread_Mutex TexMutex;            /**< texobj thread safety */
2488    GLuint TextureStateStamp;            /**< state notification for shared tex */
2489    /*@}*/
2490
2491    /** Default buffer object for vertex arrays that aren't in VBOs */
2492    struct gl_buffer_object *NullBufferObj;
2493
2494    /**
2495     * \name Vertex/geometry/fragment programs
2496     */
2497    /*@{*/
2498    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2499    struct gl_vertex_program *DefaultVertexProgram;
2500    struct gl_fragment_program *DefaultFragmentProgram;
2501    struct gl_geometry_program *DefaultGeometryProgram;
2502    /*@}*/
2503
2504    /* GL_ATI_fragment_shader */
2505    struct _mesa_HashTable *ATIShaders;
2506    struct ati_fragment_shader *DefaultFragmentShader;
2507
2508    struct _mesa_HashTable *BufferObjects;
2509
2510    /** Table of both gl_shader and gl_shader_program objects */
2511    struct _mesa_HashTable *ShaderObjects;
2512
2513    /* GL_EXT_framebuffer_object */
2514    struct _mesa_HashTable *RenderBuffers;
2515    struct _mesa_HashTable *FrameBuffers;
2516
2517    /* GL_ARB_sync */
2518    struct simple_node SyncObjects;
2519
2520    /** GL_ARB_sampler_objects */
2521    struct _mesa_HashTable *SamplerObjects;
2522 };
2523
2524
2525
2526 /**
2527  * Renderbuffers represent drawing surfaces such as color, depth and/or
2528  * stencil.  A framebuffer object has a set of renderbuffers.
2529  * Drivers will typically derive subclasses of this type.
2530  */
2531 struct gl_renderbuffer
2532 {
2533    _glthread_Mutex Mutex; /**< for thread safety */
2534    GLuint ClassID;        /**< Useful for drivers */
2535    GLuint Name;
2536    GLint RefCount;
2537    GLuint Width, Height;
2538    GLboolean Purgeable;  /**< Is the buffer purgeable under memory pressure? */
2539    GLboolean AttachedAnytime; /**< TRUE if it was attached to a framebuffer */
2540    GLubyte NumSamples;
2541    GLenum InternalFormat; /**< The user-specified format */
2542    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2543                                GL_STENCIL_INDEX. */
2544    gl_format Format;      /**< The actual renderbuffer memory format */
2545
2546    /** Delete this renderbuffer */
2547    void (*Delete)(struct gl_renderbuffer *rb);
2548
2549    /** Allocate new storage for this renderbuffer */
2550    GLboolean (*AllocStorage)(struct gl_context *ctx,
2551                              struct gl_renderbuffer *rb,
2552                              GLenum internalFormat,
2553                              GLuint width, GLuint height);
2554 };
2555
2556
2557 /**
2558  * A renderbuffer attachment points to either a texture object (and specifies
2559  * a mipmap level, cube face or 3D texture slice) or points to a renderbuffer.
2560  */
2561 struct gl_renderbuffer_attachment
2562 {
2563    GLenum Type;  /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
2564    GLboolean Complete;
2565
2566    /**
2567     * If \c Type is \c GL_RENDERBUFFER_EXT, this stores a pointer to the
2568     * application supplied renderbuffer object.
2569     */
2570    struct gl_renderbuffer *Renderbuffer;
2571
2572    /**
2573     * If \c Type is \c GL_TEXTURE, this stores a pointer to the application
2574     * supplied texture object.
2575     */
2576    struct gl_texture_object *Texture;
2577    GLuint TextureLevel; /**< Attached mipmap level. */
2578    GLuint CubeMapFace;  /**< 0 .. 5, for cube map textures. */
2579    GLuint Zoffset;      /**< Slice for 3D textures,  or layer for both 1D
2580                          * and 2D array textures */
2581 };
2582
2583
2584 /**
2585  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2586  * In C++ terms, think of this as a base class from which device drivers
2587  * will make derived classes.
2588  */
2589 struct gl_framebuffer
2590 {
2591    _glthread_Mutex Mutex;  /**< for thread safety */
2592    /**
2593     * If zero, this is a window system framebuffer.  If non-zero, this
2594     * is a FBO framebuffer; note that for some devices (i.e. those with
2595     * a natural pixel coordinate system for FBOs that differs from the
2596     * OpenGL/Mesa coordinate system), this means that the viewport,
2597     * polygon face orientation, and polygon stipple will have to be inverted.
2598     */
2599    GLuint Name;
2600
2601    GLint RefCount;
2602    GLboolean DeletePending;
2603
2604    /**
2605     * The framebuffer's visual. Immutable if this is a window system buffer.
2606     * Computed from attachments if user-made FBO.
2607     */
2608    struct gl_config Visual;
2609
2610    GLboolean Initialized;
2611
2612    GLuint Width, Height;        /**< size of frame buffer in pixels */
2613
2614    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2615    /*@{*/
2616    GLint _Xmin, _Xmax;  /**< inclusive */
2617    GLint _Ymin, _Ymax;  /**< exclusive */
2618    /*@}*/
2619
2620    /** \name  Derived Z buffer stuff */
2621    /*@{*/
2622    GLuint _DepthMax;    /**< Max depth buffer value */
2623    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2624    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2625    /*@}*/
2626
2627    /** One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2628    GLenum _Status;
2629
2630    /** Integer color values */
2631    GLboolean _IntegerColor;
2632
2633    /** Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2634    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2635
2636    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2637     * attribute group and GL_PIXEL attribute group, respectively.
2638     */
2639    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2640    GLenum ColorReadBuffer;
2641
2642    /** Computed from ColorDraw/ReadBuffer above */
2643    GLuint _NumColorDrawBuffers;
2644    GLint _ColorDrawBufferIndexes[MAX_DRAW_BUFFERS]; /**< BUFFER_x or -1 */
2645    GLint _ColorReadBufferIndex; /* -1 = None */
2646    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS];
2647    struct gl_renderbuffer *_ColorReadBuffer;
2648
2649    /** Delete this framebuffer */
2650    void (*Delete)(struct gl_framebuffer *fb);
2651 };
2652
2653
2654 /**
2655  * Precision info for shader datatypes.  See glGetShaderPrecisionFormat().
2656  */
2657 struct gl_precision
2658 {
2659    GLushort RangeMin;   /**< min value exponent */
2660    GLushort RangeMax;   /**< max value exponent */
2661    GLushort Precision;  /**< number of mantissa bits */
2662 };
2663
2664
2665 /**
2666  * Limits for vertex, geometry and fragment programs/shaders.
2667  */
2668 struct gl_program_constants
2669 {
2670    /* logical limits */
2671    GLuint MaxInstructions;
2672    GLuint MaxAluInstructions;
2673    GLuint MaxTexInstructions;
2674    GLuint MaxTexIndirections;
2675    GLuint MaxAttribs;
2676    GLuint MaxTemps;
2677    GLuint MaxAddressRegs;
2678    GLuint MaxAddressOffset;  /**< [-MaxAddressOffset, MaxAddressOffset-1] */
2679    GLuint MaxParameters;
2680    GLuint MaxLocalParams;
2681    GLuint MaxEnvParams;
2682    /* native/hardware limits */
2683    GLuint MaxNativeInstructions;
2684    GLuint MaxNativeAluInstructions;
2685    GLuint MaxNativeTexInstructions;
2686    GLuint MaxNativeTexIndirections;
2687    GLuint MaxNativeAttribs;
2688    GLuint MaxNativeTemps;
2689    GLuint MaxNativeAddressRegs;
2690    GLuint MaxNativeParameters;
2691    /* For shaders */
2692    GLuint MaxUniformComponents;  /**< Usually == MaxParameters * 4 */
2693    /* ES 2.0 and GL_ARB_ES2_compatibility */
2694    struct gl_precision LowFloat, MediumFloat, HighFloat;
2695    struct gl_precision LowInt, MediumInt, HighInt;
2696 };
2697
2698
2699 /**
2700  * Constants which may be overridden by device driver during context creation
2701  * but are never changed after that.
2702  */
2703 struct gl_constants
2704 {
2705    GLint MaxTextureMbytes;      /**< Max memory per image, in MB */
2706    GLint MaxTextureLevels;      /**< Max mipmap levels. */
2707    GLint Max3DTextureLevels;    /**< Max mipmap levels for 3D textures */
2708    GLint MaxCubeTextureLevels;  /**< Max mipmap levels for cube textures */
2709    GLint MaxArrayTextureLayers; /**< Max layers in array textures */
2710    GLint MaxTextureRectSize;    /**< Max rectangle texture size, in pixes */
2711    GLuint MaxTextureCoordUnits;
2712    GLuint MaxTextureImageUnits;
2713    GLuint MaxVertexTextureImageUnits;
2714    GLuint MaxCombinedTextureImageUnits;
2715    GLuint MaxGeometryTextureImageUnits;
2716    GLuint MaxTextureUnits;           /**< = MIN(CoordUnits, ImageUnits) */
2717    GLfloat MaxTextureMaxAnisotropy;  /**< GL_EXT_texture_filter_anisotropic */
2718    GLfloat MaxTextureLodBias;        /**< GL_EXT_texture_lod_bias */
2719    GLuint MaxTextureBufferSize;      /**< GL_ARB_texture_buffer_object */
2720
2721    GLuint MaxArrayLockSize;
2722
2723    GLint SubPixelBits;
2724
2725    GLfloat MinPointSize, MaxPointSize;       /**< aliased */
2726    GLfloat MinPointSizeAA, MaxPointSizeAA;   /**< antialiased */
2727    GLfloat PointSizeGranularity;
2728    GLfloat MinLineWidth, MaxLineWidth;       /**< aliased */
2729    GLfloat MinLineWidthAA, MaxLineWidthAA;   /**< antialiased */
2730    GLfloat LineWidthGranularity;
2731
2732    GLuint MaxColorTableSize;
2733
2734    GLuint MaxClipPlanes;
2735    GLuint MaxLights;
2736    GLfloat MaxShininess;                     /**< GL_NV_light_max_exponent */
2737    GLfloat MaxSpotExponent;                  /**< GL_NV_light_max_exponent */
2738
2739    GLuint MaxViewportWidth, MaxViewportHeight;
2740
2741    struct gl_program_constants VertexProgram;   /**< GL_ARB_vertex_program */
2742    struct gl_program_constants FragmentProgram; /**< GL_ARB_fragment_program */
2743    struct gl_program_constants GeometryProgram;  /**< GL_ARB_geometry_shader4 */
2744    GLuint MaxProgramMatrices;
2745    GLuint MaxProgramMatrixStackDepth;
2746
2747    /** vertex array / buffer object bounds checking */
2748    GLboolean CheckArrayBounds;
2749
2750    GLuint MaxDrawBuffers;    /**< GL_ARB_draw_buffers */
2751
2752    GLuint MaxColorAttachments;   /**< GL_EXT_framebuffer_object */
2753    GLuint MaxRenderbufferSize;   /**< GL_EXT_framebuffer_object */
2754    GLuint MaxSamples;            /**< GL_ARB_framebuffer_object */
2755
2756    /** Number of varying vectors between vertex and fragment shaders */
2757    GLuint MaxVarying;
2758    GLuint MaxVertexVaryingComponents;   /**< Between vert and geom shader */
2759    GLuint MaxGeometryVaryingComponents; /**< Between geom and frag shader */
2760
2761    /** GL_ARB_geometry_shader4 */
2762    GLuint MaxGeometryOutputVertices;
2763    GLuint MaxGeometryTotalOutputComponents;
2764
2765    GLuint GLSLVersion;  /**< GLSL version supported (ex: 120 = 1.20) */
2766
2767    /**
2768     * Changes default GLSL extension behavior from "error" to "warn".  It's out
2769     * of spec, but it can make some apps work that otherwise wouldn't.
2770     */
2771    GLboolean ForceGLSLExtensionsWarn;
2772
2773    /**
2774     * Does the driver support real 32-bit integers?  (Otherwise, integers are
2775     * simulated via floats.)
2776     */
2777    GLboolean NativeIntegers;
2778
2779    /**
2780     * If the driver supports real 32-bit integers, what integer value should be
2781     * used for boolean true in uniform uploads?  (Usually 1 or ~0.)
2782     */
2783    GLuint UniformBooleanTrue;
2784
2785    /** Which texture units support GL_ATI_envmap_bumpmap as targets */
2786    GLbitfield SupportedBumpUnits;
2787
2788    /**
2789     * Maximum amount of time, measured in nanseconds, that the server can wait.
2790     */
2791    GLuint64 MaxServerWaitTimeout;
2792
2793    /** GL_EXT_provoking_vertex */
2794    GLboolean QuadsFollowProvokingVertexConvention;
2795
2796    /** OpenGL version 3.0 */
2797    GLbitfield ContextFlags;  /**< Ex: GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT */
2798
2799    /** OpenGL version 3.2 */
2800    GLbitfield ProfileMask;   /**< Mask of CONTEXT_x_PROFILE_BIT */
2801
2802    /** GL_EXT_transform_feedback */
2803    GLuint MaxTransformFeedbackSeparateAttribs;
2804    GLuint MaxTransformFeedbackSeparateComponents;
2805    GLuint MaxTransformFeedbackInterleavedComponents;
2806
2807    /** GL_EXT_gpu_shader4 */
2808    GLint MinProgramTexelOffset, MaxProgramTexelOffset;
2809
2810    /* GL_ARB_robustness */
2811    GLenum ResetStrategy;
2812
2813    /**
2814     * Whether the implementation strips out and ignores texture borders.
2815     *
2816     * Many GPU hardware implementations don't support rendering with texture
2817     * borders and mipmapped textures.  (Note: not static border color, but the
2818     * old 1-pixel border around each edge).  Implementations then have to do
2819     * slow fallbacks to be correct, or just ignore the border and be fast but
2820     * wrong.  Setting the flag strips the border off of TexImage calls,
2821     * providing "fast but wrong" at significantly reduced driver complexity.
2822     *
2823     * Texture borders are deprecated in GL 3.0.
2824     **/
2825    GLboolean StripTextureBorder;
2826
2827    /**
2828     * For drivers which can do a better job at eliminating unused varyings
2829     * and uniforms than the GLSL compiler.
2830     *
2831     * XXX Remove these as soon as a better solution is available.
2832     */
2833    GLboolean GLSLSkipStrictMaxVaryingLimitCheck;
2834    GLboolean GLSLSkipStrictMaxUniformLimitCheck;
2835 };
2836
2837
2838 /**
2839  * Enable flag for each OpenGL extension.  Different device drivers will
2840  * enable different extensions at runtime.
2841  */
2842 struct gl_extensions
2843 {
2844    GLboolean dummy;  /* don't remove this! */
2845    GLboolean dummy_true;  /* Set true by _mesa_init_extensions(). */
2846    GLboolean dummy_false; /* Set false by _mesa_init_extensions(). */
2847    GLboolean ARB_ES2_compatibility;
2848    GLboolean ARB_blend_func_extended;
2849    GLboolean ARB_color_buffer_float;
2850    GLboolean ARB_conservative_depth;
2851    GLboolean ARB_copy_buffer;
2852    GLboolean ARB_depth_buffer_float;
2853    GLboolean ARB_depth_clamp;
2854    GLboolean ARB_depth_texture;
2855    GLboolean ARB_draw_buffers_blend;
2856    GLboolean ARB_draw_elements_base_vertex;
2857    GLboolean ARB_draw_instanced;
2858    GLboolean ARB_fragment_coord_conventions;
2859    GLboolean ARB_fragment_program;
2860    GLboolean ARB_fragment_program_shadow;
2861    GLboolean ARB_fragment_shader;
2862    GLboolean ARB_framebuffer_object;
2863    GLboolean ARB_explicit_attrib_location;
2864    GLboolean ARB_geometry_shader4;
2865    GLboolean ARB_half_float_pixel;
2866    GLboolean ARB_half_float_vertex;
2867    GLboolean ARB_instanced_arrays;
2868    GLboolean ARB_map_buffer_range;
2869    GLboolean ARB_occlusion_query;
2870    GLboolean ARB_occlusion_query2;
2871    GLboolean ARB_point_sprite;
2872    GLboolean ARB_sampler_objects;
2873    GLboolean ARB_seamless_cube_map;
2874    GLboolean ARB_shader_objects;
2875    GLboolean ARB_shader_stencil_export;
2876    GLboolean ARB_shader_texture_lod;
2877    GLboolean ARB_shading_language_100;
2878    GLboolean ARB_shadow;
2879    GLboolean ARB_shadow_ambient;
2880    GLboolean ARB_sync;
2881    GLboolean ARB_texture_border_clamp;
2882    GLboolean ARB_texture_buffer_object;
2883    GLboolean ARB_texture_compression_rgtc;
2884    GLboolean ARB_texture_cube_map;
2885    GLboolean ARB_texture_env_combine;
2886    GLboolean ARB_texture_env_crossbar;
2887    GLboolean ARB_texture_env_dot3;
2888    GLboolean ARB_texture_float;
2889    GLboolean ARB_texture_multisample;
2890    GLboolean ARB_texture_non_power_of_two;
2891    GLboolean ARB_texture_rg;
2892    GLboolean ARB_texture_rgb10_a2ui;
2893    GLboolean ARB_texture_storage;
2894    GLboolean ARB_timer_query;
2895    GLboolean ARB_transform_feedback2;
2896    GLboolean ARB_transpose_matrix;
2897    GLboolean ARB_uniform_buffer_object;
2898    GLboolean ARB_vertex_array_object;
2899    GLboolean ARB_vertex_program;
2900    GLboolean ARB_vertex_shader;
2901    GLboolean ARB_vertex_type_2_10_10_10_rev;
2902    GLboolean ARB_window_pos;
2903    GLboolean EXT_blend_color;
2904    GLboolean EXT_blend_equation_separate;
2905    GLboolean EXT_blend_func_separate;
2906    GLboolean EXT_blend_minmax;
2907    GLboolean EXT_clip_volume_hint;
2908    GLboolean EXT_compiled_vertex_array;
2909    GLboolean EXT_depth_bounds_test;
2910    GLboolean EXT_draw_buffers2;
2911    GLboolean EXT_draw_range_elements;
2912    GLboolean EXT_fog_coord;
2913    GLboolean EXT_framebuffer_blit;
2914    GLboolean EXT_framebuffer_multisample;
2915    GLboolean EXT_framebuffer_object;
2916    GLboolean EXT_framebuffer_sRGB;
2917    GLboolean EXT_gpu_program_parameters;
2918    GLboolean EXT_gpu_shader4;
2919    GLboolean EXT_packed_depth_stencil;
2920    GLboolean EXT_packed_float;
2921    GLboolean EXT_packed_pixels;
2922    GLboolean EXT_pixel_buffer_object;
2923    GLboolean EXT_point_parameters;
2924    GLboolean EXT_provoking_vertex;
2925    GLboolean EXT_rescale_normal;
2926    GLboolean EXT_shadow_funcs;
2927    GLboolean EXT_secondary_color;
2928    GLboolean EXT_separate_shader_objects;
2929    GLboolean EXT_separate_specular_color;
2930    GLboolean EXT_stencil_two_side;
2931    GLboolean EXT_texture3D;
2932    GLboolean EXT_texture_array;
2933    GLboolean EXT_texture_compression_latc;
2934    GLboolean EXT_texture_compression_s3tc;
2935    GLboolean EXT_texture_env_dot3;
2936    GLboolean EXT_texture_filter_anisotropic;
2937    GLboolean EXT_texture_integer;
2938    GLboolean EXT_texture_mirror_clamp;
2939    GLboolean EXT_texture_shared_exponent;
2940    GLboolean EXT_texture_snorm;
2941    GLboolean EXT_texture_sRGB;
2942    GLboolean EXT_texture_sRGB_decode;
2943    GLboolean EXT_texture_swizzle;
2944    GLboolean EXT_transform_feedback;
2945    GLboolean EXT_timer_query;
2946    GLboolean EXT_vertex_array_bgra;
2947    GLboolean OES_standard_derivatives;
2948    /* vendor extensions */
2949    GLboolean AMD_seamless_cubemap_per_texture;
2950    GLboolean APPLE_packed_pixels;
2951    GLboolean APPLE_vertex_array_object;
2952    GLboolean APPLE_object_purgeable;
2953    GLboolean ATI_envmap_bumpmap;
2954    GLboolean ATI_texture_compression_3dc;
2955    GLboolean ATI_texture_mirror_once;
2956    GLboolean ATI_texture_env_combine3;
2957    GLboolean ATI_fragment_shader;
2958    GLboolean ATI_separate_stencil;
2959    GLboolean IBM_rasterpos_clip;
2960    GLboolean IBM_multimode_draw_arrays;
2961    GLboolean MESA_pack_invert;
2962    GLboolean MESA_resize_buffers;
2963    GLboolean MESA_ycbcr_texture;
2964    GLboolean MESA_texture_array;
2965    GLboolean NV_blend_square;
2966    GLboolean NV_conditional_render;
2967    GLboolean NV_fog_distance;
2968    GLboolean NV_fragment_program;
2969    GLboolean NV_fragment_program_option;
2970    GLboolean NV_light_max_exponent;
2971    GLboolean NV_point_sprite;
2972    GLboolean NV_primitive_restart;
2973    GLboolean NV_texture_barrier;
2974    GLboolean NV_texgen_reflection;
2975    GLboolean NV_texture_env_combine4;
2976    GLboolean NV_texture_rectangle;
2977    GLboolean NV_vertex_program;
2978    GLboolean NV_vertex_program1_1;
2979    GLboolean SGIS_texture_lod;
2980    GLboolean TDFX_texture_compression_FXT1;
2981    GLboolean S3_s3tc;
2982    GLboolean OES_EGL_image;
2983    GLboolean OES_draw_texture;
2984    GLboolean OES_EGL_image_external;
2985    GLboolean OES_compressed_ETC1_RGB8_texture;
2986    GLboolean extension_sentinel;
2987    /** The extension string */
2988    const GLubyte *String;
2989    /** Number of supported extensions */
2990    GLuint Count;
2991 };
2992
2993
2994 /**
2995  * A stack of matrices (projection, modelview, color, texture, etc).
2996  */
2997 struct gl_matrix_stack
2998 {
2999    GLmatrix *Top;      /**< points into Stack */
3000    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
3001    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
3002    GLuint MaxDepth;    /**< size of Stack[] array */
3003    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
3004 };
3005
3006
3007 /**
3008  * \name Bits for image transfer operations
3009  * \sa __struct gl_contextRec::ImageTransferState.
3010  */
3011 /*@{*/
3012 #define IMAGE_SCALE_BIAS_BIT                      0x1
3013 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
3014 #define IMAGE_MAP_COLOR_BIT                       0x4
3015 #define IMAGE_CLAMP_BIT                           0x800
3016
3017
3018 /** Pixel Transfer ops */
3019 #define IMAGE_BITS (IMAGE_SCALE_BIAS_BIT |                      \
3020                     IMAGE_SHIFT_OFFSET_BIT |                    \
3021                     IMAGE_MAP_COLOR_BIT)
3022
3023 /**
3024  * \name Bits to indicate what state has changed.
3025  */
3026 /*@{*/
3027 #define _NEW_MODELVIEW         (1 << 0)   /**< gl_context::ModelView */
3028 #define _NEW_PROJECTION        (1 << 1)   /**< gl_context::Projection */
3029 #define _NEW_TEXTURE_MATRIX    (1 << 2)   /**< gl_context::TextureMatrix */
3030 #define _NEW_COLOR             (1 << 3)   /**< gl_context::Color */
3031 #define _NEW_DEPTH             (1 << 4)   /**< gl_context::Depth */
3032 #define _NEW_EVAL              (1 << 5)   /**< gl_context::Eval, EvalMap */
3033 #define _NEW_FOG               (1 << 6)   /**< gl_context::Fog */
3034 #define _NEW_HINT              (1 << 7)   /**< gl_context::Hint */
3035 #define _NEW_LIGHT             (1 << 8)   /**< gl_context::Light */
3036 #define _NEW_LINE              (1 << 9)   /**< gl_context::Line */
3037 #define _NEW_PIXEL             (1 << 10)  /**< gl_context::Pixel */
3038 #define _NEW_POINT             (1 << 11)  /**< gl_context::Point */
3039 #define _NEW_POLYGON           (1 << 12)  /**< gl_context::Polygon */
3040 #define _NEW_POLYGONSTIPPLE    (1 << 13)  /**< gl_context::PolygonStipple */
3041 #define _NEW_SCISSOR           (1 << 14)  /**< gl_context::Scissor */
3042 #define _NEW_STENCIL           (1 << 15)  /**< gl_context::Stencil */
3043 #define _NEW_TEXTURE           (1 << 16)  /**< gl_context::Texture */
3044 #define _NEW_TRANSFORM         (1 << 17)  /**< gl_context::Transform */
3045 #define _NEW_VIEWPORT          (1 << 18)  /**< gl_context::Viewport */
3046 #define _NEW_PACKUNPACK        (1 << 19)  /**< gl_context::Pack, Unpack */
3047 #define _NEW_ARRAY             (1 << 20)  /**< gl_context::Array */
3048 #define _NEW_RENDERMODE        (1 << 21)  /**< gl_context::RenderMode, etc */
3049 #define _NEW_BUFFERS           (1 << 22)  /**< gl_context::Visual, DrawBuffer, */
3050 #define _NEW_CURRENT_ATTRIB    (1 << 23)  /**< gl_context::Current */
3051 #define _NEW_MULTISAMPLE       (1 << 24)  /**< gl_context::Multisample */
3052 #define _NEW_TRACK_MATRIX      (1 << 25)  /**< gl_context::VertexProgram */
3053 #define _NEW_PROGRAM           (1 << 26)  /**< New program/shader state */
3054 #define _NEW_PROGRAM_CONSTANTS (1 << 27)
3055 #define _NEW_BUFFER_OBJECT     (1 << 28)
3056 #define _NEW_FRAG_CLAMP        (1 << 29)
3057 #define _NEW_TRANSFORM_FEEDBACK (1 << 30) /**< gl_context::TransformFeedback */
3058 #define _NEW_ALL ~0
3059
3060 /**
3061  * We use _NEW_TRANSFORM for GL_RASTERIZER_DISCARD.  This #define is for
3062  * clarity.
3063  */
3064 #define _NEW_RASTERIZER_DISCARD _NEW_TRANSFORM
3065 /*@}*/
3066
3067
3068 /**
3069  * \name A bunch of flags that we think might be useful to drivers.
3070  *
3071  * Set in the __struct gl_contextRec::_TriangleCaps bitfield.
3072  */
3073 /*@{*/
3074 #define DD_SEPARATE_SPECULAR        (1 << 0)
3075 #define DD_TRI_LIGHT_TWOSIDE        (1 << 1)
3076 #define DD_TRI_UNFILLED             (1 << 2)
3077 #define DD_TRI_SMOOTH               (1 << 3)
3078 #define DD_TRI_STIPPLE              (1 << 4)
3079 #define DD_TRI_OFFSET               (1 << 5)
3080 #define DD_LINE_SMOOTH              (1 << 6)
3081 #define DD_LINE_STIPPLE             (1 << 7)
3082 #define DD_POINT_SMOOTH             (1 << 8)
3083 #define DD_POINT_ATTEN              (1 << 9)
3084 /*@}*/
3085
3086
3087 /**
3088  * Composite state flags
3089  */
3090 /*@{*/
3091 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
3092                                            _NEW_TEXTURE |       \
3093                                            _NEW_POINT |         \
3094                                            _NEW_PROGRAM |       \
3095                                            _NEW_MODELVIEW)
3096
3097 #define _MESA_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | \
3098                                             _NEW_FOG | \
3099                                             _NEW_PROGRAM)
3100
3101
3102 /*@}*/
3103
3104
3105
3106
3107 /* This has to be included here. */
3108 #include "dd.h"
3109
3110
3111 /**
3112  * Display list flags.
3113  * Strictly this is a tnl-private concept, but it doesn't seem
3114  * worthwhile adding a tnl private structure just to hold this one bit
3115  * of information:
3116  */
3117 #define DLIST_DANGLING_REFS     0x1
3118
3119
3120 /** Opaque declaration of display list payload data type */
3121 union gl_dlist_node;
3122
3123
3124 /**
3125  * Provide a location where information about a display list can be
3126  * collected.  Could be extended with driverPrivate structures,
3127  * etc. in the future.
3128  */
3129 struct gl_display_list
3130 {
3131    GLuint Name;
3132    GLbitfield Flags;  /**< DLIST_x flags */
3133    /** The dlist commands are in a linked list of nodes */
3134    union gl_dlist_node *Head;
3135 };
3136
3137
3138 /**
3139  * State used during display list compilation and execution.
3140  */
3141 struct gl_dlist_state
3142 {
3143    GLuint CallDepth;            /**< Current recursion calling depth */
3144
3145    struct gl_display_list *CurrentList; /**< List currently being compiled */
3146    union gl_dlist_node *CurrentBlock; /**< Pointer to current block of nodes */
3147    GLuint CurrentPos;           /**< Index into current block of nodes */
3148
3149    GLvertexformat ListVtxfmt;
3150
3151    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
3152    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
3153
3154    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
3155    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
3156
3157    GLubyte ActiveIndex;
3158    GLfloat CurrentIndex;
3159
3160    GLubyte ActiveEdgeFlag;
3161    GLboolean CurrentEdgeFlag;
3162
3163    struct {
3164       /* State known to have been set by the currently-compiling display
3165        * list.  Used to eliminate some redundant state changes.
3166        */
3167       GLenum ShadeModel;
3168    } Current;
3169 };
3170
3171 /**
3172  * An error, warning, or other piece of debug information for an application
3173  * to consume via GL_ARB_debug_output.
3174  */
3175 struct gl_debug_msg
3176 {
3177    GLenum source;
3178    GLenum type;
3179    GLuint id;
3180    GLenum severity;
3181    GLsizei length;
3182    GLcharARB *message;
3183 };
3184
3185 typedef enum {
3186    API_ERROR_UNKNOWN,
3187    API_ERROR_COUNT
3188 } gl_api_error;
3189
3190 typedef enum {
3191    WINSYS_ERROR_UNKNOWN,
3192    WINSYS_ERROR_COUNT
3193 } gl_winsys_error;
3194
3195 typedef enum {
3196    SHADER_ERROR_UNKNOWN,
3197    SHADER_ERROR_COUNT
3198 } gl_shader_error;
3199
3200 typedef enum {
3201    OTHER_ERROR_UNKNOWN,
3202    OTHER_ERROR_OUT_OF_MEMORY,
3203    OTHER_ERROR_COUNT
3204 } gl_other_error;
3205
3206 struct gl_client_namespace
3207 {
3208    struct _mesa_HashTable *IDs;
3209    unsigned ZeroID; /* a HashTable won't take zero, so store its state here */
3210    struct simple_node Severity[3]; /* lists of IDs in the hash table */
3211 };
3212
3213 struct gl_client_debug
3214 {
3215    GLboolean Defaults[3][2][6]; /* severity, source, type */
3216    struct gl_client_namespace Namespaces[2][6]; /* source, type */
3217 };
3218
3219 struct gl_debug_state
3220 {
3221    GLDEBUGPROCARB Callback;
3222    GLvoid *CallbackData;
3223    GLboolean SyncOutput;
3224    GLboolean ApiErrors[API_ERROR_COUNT];
3225    GLboolean WinsysErrors[WINSYS_ERROR_COUNT];
3226    GLboolean ShaderErrors[SHADER_ERROR_COUNT];
3227    GLboolean OtherErrors[OTHER_ERROR_COUNT];
3228    struct gl_client_debug ClientIDs;
3229    struct gl_debug_msg Log[MAX_DEBUG_LOGGED_MESSAGES];
3230    GLint NumMessages;
3231    GLint NextMsg;
3232    GLint NextMsgLength; /* redundant, but copied here from Log[NextMsg].length
3233                            for the sake of the offsetof() code in get.c */
3234 };
3235
3236 /**
3237  * Enum for the OpenGL APIs we know about and may support.
3238  */
3239 typedef enum
3240 {
3241    API_OPENGL,
3242    API_OPENGLES,
3243    API_OPENGLES2
3244 } gl_api;
3245
3246
3247 /**
3248  * Mesa rendering context.
3249  *
3250  * This is the central context data structure for Mesa.  Almost all
3251  * OpenGL state is contained in this structure.
3252  * Think of this as a base class from which device drivers will derive
3253  * sub classes.
3254  *
3255  * The struct gl_context typedef names this structure.
3256  */
3257 struct gl_context
3258 {
3259    /** State possibly shared with other contexts in the address space */
3260    struct gl_shared_state *Shared;
3261
3262    /** \name API function pointer tables */
3263    /*@{*/
3264    gl_api API;
3265    struct _glapi_table *Save;   /**< Display list save functions */
3266    struct _glapi_table *Exec;   /**< Execute functions */
3267    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
3268    /*@}*/
3269
3270    struct gl_config Visual;
3271    struct gl_framebuffer *DrawBuffer;   /**< buffer for writing */
3272    struct gl_framebuffer *ReadBuffer;   /**< buffer for reading */
3273    struct gl_framebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
3274    struct gl_framebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
3275
3276    /**
3277     * Device driver function pointer table
3278     */
3279    struct dd_function_table Driver;
3280
3281    void *DriverCtx;     /**< Points to device driver context/state */
3282
3283    /** Core/Driver constants */
3284    struct gl_constants Const;
3285
3286    /** \name The various 4x4 matrix stacks */
3287    /*@{*/
3288    struct gl_matrix_stack ModelviewMatrixStack;
3289    struct gl_matrix_stack ProjectionMatrixStack;
3290    struct gl_matrix_stack TextureMatrixStack[MAX_TEXTURE_UNITS];
3291    struct gl_matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
3292    struct gl_matrix_stack *CurrentStack; /**< Points to one of the above stacks */
3293    /*@}*/
3294
3295    /** Combined modelview and projection matrix */
3296    GLmatrix _ModelProjectMatrix;
3297
3298    /** \name Display lists */
3299    struct gl_dlist_state ListState;
3300
3301    GLboolean ExecuteFlag;       /**< Execute GL commands? */
3302    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
3303
3304    /** Extension information */
3305    struct gl_extensions Extensions;
3306
3307    /** Version info */
3308    GLuint VersionMajor, VersionMinor;
3309    char *VersionString;
3310
3311    /** \name State attribute stack (for glPush/PopAttrib) */
3312    /*@{*/
3313    GLuint AttribStackDepth;
3314    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
3315    /*@}*/
3316
3317    /** \name Renderer attribute groups
3318     *
3319     * We define a struct for each attribute group to make pushing and popping
3320     * attributes easy.  Also it's a good organization.
3321     */
3322    /*@{*/
3323    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
3324    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
3325    struct gl_current_attrib     Current;        /**< Current attributes */
3326    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
3327    struct gl_eval_attrib        Eval;           /**< Eval attributes */
3328    struct gl_fog_attrib         Fog;            /**< Fog attributes */
3329    struct gl_hint_attrib        Hint;           /**< Hint attributes */
3330    struct gl_light_attrib       Light;          /**< Light attributes */
3331    struct gl_line_attrib        Line;           /**< Line attributes */
3332    struct gl_list_attrib        List;           /**< List attributes */
3333    struct gl_multisample_attrib Multisample;
3334    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
3335    struct gl_point_attrib       Point;          /**< Point attributes */
3336    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
3337    GLuint PolygonStipple[32];                   /**< Polygon stipple */
3338    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
3339    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
3340    struct gl_texture_attrib     Texture;        /**< Texture attributes */
3341    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
3342    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
3343    /*@}*/
3344
3345    /** \name Client attribute stack */
3346    /*@{*/
3347    GLuint ClientAttribStackDepth;
3348    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
3349    /*@}*/
3350
3351    /** \name Client attribute groups */
3352    /*@{*/
3353    struct gl_array_attrib       Array;  /**< Vertex arrays */
3354    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
3355    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
3356    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
3357    /*@}*/
3358
3359    /** \name Other assorted state (not pushed/popped on attribute stack) */
3360    /*@{*/
3361    struct gl_pixelmaps          PixelMaps;
3362
3363    struct gl_evaluators EvalMap;   /**< All evaluators */
3364    struct gl_feedback   Feedback;  /**< Feedback */
3365    struct gl_selection  Select;    /**< Selection */
3366
3367    struct gl_program_state Program;  /**< general program state */
3368    struct gl_vertex_program_state VertexProgram;
3369    struct gl_fragment_program_state FragmentProgram;
3370    struct gl_geometry_program_state GeometryProgram;
3371    struct gl_ati_fragment_shader_state ATIFragmentShader;
3372
3373    struct gl_shader_state Shader; /**< GLSL shader object state */
3374    struct gl_shader_compiler_options ShaderCompilerOptions[MESA_SHADER_TYPES];
3375
3376    struct gl_query_state Query;  /**< occlusion, timer queries */
3377
3378    struct gl_transform_feedback_state TransformFeedback;
3379
3380    struct gl_buffer_object *CopyReadBuffer; /**< GL_ARB_copy_buffer */
3381    struct gl_buffer_object *CopyWriteBuffer; /**< GL_ARB_copy_buffer */
3382    /*@}*/
3383
3384    struct gl_meta_state *Meta;  /**< for "meta" operations */
3385
3386    /* GL_EXT_framebuffer_object */
3387    struct gl_renderbuffer *CurrentRenderbuffer;
3388
3389    GLenum ErrorValue;        /**< Last error code */
3390
3391    /* GL_ARB_robustness */
3392    GLenum ResetStatus;
3393
3394    /**
3395     * Recognize and silence repeated error debug messages in buggy apps.
3396     */
3397    const char *ErrorDebugFmtString;
3398    GLuint ErrorDebugCount;
3399
3400    /* GL_ARB_debug_output */
3401    struct gl_debug_state Debug;
3402
3403    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
3404    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
3405
3406    GLboolean ViewportInitialized;  /**< has viewport size been initialized? */
3407
3408    GLbitfield64 varying_vp_inputs;  /**< mask of VERT_BIT_* flags */
3409
3410    /** \name Derived state */
3411    /*@{*/
3412    /** Bitwise-or of DD_* flags.  Note that this bitfield may be used before
3413     * state validation so they need to always be current.
3414     */
3415    GLbitfield _TriangleCaps;
3416    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
3417    GLfloat _EyeZDir[3];
3418    GLfloat _ModelViewInvScale;
3419    GLboolean _NeedEyeCoords;
3420    GLboolean _ForceEyeCoords;
3421
3422    GLuint TextureStateTimestamp; /**< detect changes to shared state */
3423
3424    struct gl_list_extensions *ListExt; /**< driver dlist extensions */
3425
3426    /** \name For debugging/development only */
3427    /*@{*/
3428    GLboolean FirstTimeCurrent;
3429    /*@}*/
3430
3431    /** software compression/decompression supported or not */
3432    GLboolean Mesa_DXTn;
3433
3434    GLboolean TextureFormatSupported[MESA_FORMAT_COUNT];
3435
3436    /**
3437     * Use dp4 (rather than mul/mad) instructions for position
3438     * transformation?
3439     */
3440    GLboolean mvp_with_dp4;
3441
3442    GLboolean RasterDiscard;  /**< GL_RASTERIZER_DISCARD */
3443
3444    /**
3445     * \name Hooks for module contexts.
3446     *
3447     * These will eventually live in the driver or elsewhere.
3448     */
3449    /*@{*/
3450    void *swrast_context;
3451    void *swsetup_context;
3452    void *swtnl_context;
3453    void *swtnl_im;
3454    struct st_context *st;
3455    void *aelt_context;
3456    /*@}*/
3457 };
3458
3459
3460 #ifdef DEBUG
3461 extern int MESA_VERBOSE;
3462 extern int MESA_DEBUG_FLAGS;
3463 # define MESA_FUNCTION __FUNCTION__
3464 #else
3465 # define MESA_VERBOSE 0
3466 # define MESA_DEBUG_FLAGS 0
3467 # define MESA_FUNCTION "a function"
3468 # ifndef NDEBUG
3469 #  define NDEBUG
3470 # endif
3471 #endif
3472
3473
3474 /** The MESA_VERBOSE var is a bitmask of these flags */
3475 enum _verbose
3476 {
3477    VERBOSE_VARRAY               = 0x0001,
3478    VERBOSE_TEXTURE              = 0x0002,
3479    VERBOSE_MATERIAL             = 0x0004,
3480    VERBOSE_PIPELINE             = 0x0008,
3481    VERBOSE_DRIVER               = 0x0010,
3482    VERBOSE_STATE                = 0x0020,
3483    VERBOSE_API                  = 0x0040,
3484    VERBOSE_DISPLAY_LIST         = 0x0100,
3485    VERBOSE_LIGHTING             = 0x0200,
3486    VERBOSE_PRIMS                = 0x0400,
3487    VERBOSE_VERTS                = 0x0800,
3488    VERBOSE_DISASSEM             = 0x1000,
3489    VERBOSE_DRAW                 = 0x2000,
3490    VERBOSE_SWAPBUFFERS          = 0x4000
3491 };
3492
3493
3494 /** The MESA_DEBUG_FLAGS var is a bitmask of these flags */
3495 enum _debug
3496 {
3497    DEBUG_ALWAYS_FLUSH           = 0x1
3498 };
3499
3500
3501
3502 #ifdef __cplusplus
3503 }
3504 #endif
3505
3506 #endif /* MTYPES_H */