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
  60
  61 /**
  62  * \name Some forward type declarations
  63  */
  64 /*@{*/
  65 struct _mesa_HashTable;
  66 struct gl_attrib_node;
  67 struct gl_list_extensions;
  68 struct gl_meta_state;
  69 struct gl_program_cache;
  70 struct gl_texture_object;
  71 struct gl_context;
  72 struct st_context;
  73 struct gl_uniform_storage;
  74 /*@}*/
  75
  76
  77 /** Extra draw modes beyond GL_POINTS, GL_TRIANGLE_FAN, etc */
  78 #define PRIM_OUTSIDE_BEGIN_END   (GL_POLYGON+1)
  79 #define PRIM_INSIDE_UNKNOWN_PRIM (GL_POLYGON+2)
  80 #define PRIM_UNKNOWN             (GL_POLYGON+3)
  81
  82
  83 /**
  84  * Shader stages. Note that these will become 5 with tessellation.
  85  * These MUST have the same values as gallium's PIPE_SHADER_*
  86  */
  87 typedef enum
  88 {
  89    MESA_SHADER_VERTEX = 0,
  90    MESA_SHADER_FRAGMENT = 1,
  91    MESA_SHADER_GEOMETRY = 2,
  92    MESA_SHADER_TYPES = 3
  93 } gl_shader_type;
  94
  95
  96
  97 /**
  98  * Indexes for vertex program attributes.
  99  * GL_NV_vertex_program aliases generic attributes over the conventional
 100  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 101  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 102  * generic attributes are distinct/separate).
 103  */
 104 typedef enum
 105 {
 106    VERT_ATTRIB_POS = 0,
 107    VERT_ATTRIB_WEIGHT = 1,
 108    VERT_ATTRIB_NORMAL = 2,
 109    VERT_ATTRIB_COLOR0 = 3,
 110    VERT_ATTRIB_COLOR1 = 4,
 111    VERT_ATTRIB_FOG = 5,
 112    VERT_ATTRIB_COLOR_INDEX = 6,
 113    VERT_ATTRIB_EDGEFLAG = 7,
 114    VERT_ATTRIB_TEX0 = 8,
 115    VERT_ATTRIB_TEX1 = 9,
 116    VERT_ATTRIB_TEX2 = 10,
 117    VERT_ATTRIB_TEX3 = 11,
 118    VERT_ATTRIB_TEX4 = 12,
 119    VERT_ATTRIB_TEX5 = 13,
 120    VERT_ATTRIB_TEX6 = 14,
 121    VERT_ATTRIB_TEX7 = 15,
 122    VERT_ATTRIB_POINT_SIZE = 16,
 123    VERT_ATTRIB_GENERIC0 = 17,
 124    VERT_ATTRIB_GENERIC1 = 18,
 125    VERT_ATTRIB_GENERIC2 = 19,
 126    VERT_ATTRIB_GENERIC3 = 20,
 127    VERT_ATTRIB_GENERIC4 = 21,
 128    VERT_ATTRIB_GENERIC5 = 22,
 129    VERT_ATTRIB_GENERIC6 = 23,
 130    VERT_ATTRIB_GENERIC7 = 24,
 131    VERT_ATTRIB_GENERIC8 = 25,
 132    VERT_ATTRIB_GENERIC9 = 26,
 133    VERT_ATTRIB_GENERIC10 = 27,
 134    VERT_ATTRIB_GENERIC11 = 28,
 135    VERT_ATTRIB_GENERIC12 = 29,
 136    VERT_ATTRIB_GENERIC13 = 30,
 137    VERT_ATTRIB_GENERIC14 = 31,
 138    VERT_ATTRIB_GENERIC15 = 32,
 139    VERT_ATTRIB_MAX = 33
 140 } gl_vert_attrib;
 141
 142 /**
 143  * Symbolic constats to help iterating over
 144  * specific blocks of vertex attributes.
 145  *
 146  * VERT_ATTRIB_FF
 147  *   includes all fixed function attributes as well as
 148  *   the aliased GL_NV_vertex_program shader attributes.
 149  * VERT_ATTRIB_TEX
 150  *   include the classic texture coordinate attributes.
 151  *   Is a subset of VERT_ATTRIB_FF.
 152  * VERT_ATTRIB_GENERIC_NV
 153  *   include the NV shader attributes.
 154  *   Is a subset of VERT_ATTRIB_FF.
 155  * VERT_ATTRIB_GENERIC
 156  *   include the OpenGL 2.0+ GLSL generic shader attributes.
 157  *   These alias the generic GL_ARB_vertex_shader attributes.
 158  */
 159 #define VERT_ATTRIB_FF(i)           (VERT_ATTRIB_POS + (i))
 160 #define VERT_ATTRIB_FF_MAX          VERT_ATTRIB_GENERIC0
 161
 162 #define VERT_ATTRIB_TEX(i)          (VERT_ATTRIB_TEX0 + (i))
 163 #define VERT_ATTRIB_TEX_MAX         MAX_TEXTURE_COORD_UNITS
 164
 165 #define VERT_ATTRIB_GENERIC_NV(i)   (VERT_ATTRIB_POS + (i))
 166 #define VERT_ATTRIB_GENERIC_NV_MAX  MAX_VERTEX_GENERIC_ATTRIBS
 167
 168 #define VERT_ATTRIB_GENERIC(i)      (VERT_ATTRIB_GENERIC0 + (i))
 169 #define VERT_ATTRIB_GENERIC_MAX     MAX_VERTEX_GENERIC_ATTRIBS
 170
 171 /**
 172  * Bitflags for vertex attributes.
 173  * These are used in bitfields in many places.
 174  */
 175 /*@{*/
 176 #define VERT_BIT_POS             BITFIELD64_BIT(VERT_ATTRIB_POS)
 177 #define VERT_BIT_WEIGHT          BITFIELD64_BIT(VERT_ATTRIB_WEIGHT)
 178 #define VERT_BIT_NORMAL          BITFIELD64_BIT(VERT_ATTRIB_NORMAL)
 179 #define VERT_BIT_COLOR0          BITFIELD64_BIT(VERT_ATTRIB_COLOR0)
 180 #define VERT_BIT_COLOR1          BITFIELD64_BIT(VERT_ATTRIB_COLOR1)
 181 #define VERT_BIT_FOG             BITFIELD64_BIT(VERT_ATTRIB_FOG)
 182 #define VERT_BIT_COLOR_INDEX     BITFIELD64_BIT(VERT_ATTRIB_COLOR_INDEX)
 183 #define VERT_BIT_EDGEFLAG        BITFIELD64_BIT(VERT_ATTRIB_EDGEFLAG)
 184 #define VERT_BIT_TEX0            BITFIELD64_BIT(VERT_ATTRIB_TEX0)
 185 #define VERT_BIT_TEX1            BITFIELD64_BIT(VERT_ATTRIB_TEX1)
 186 #define VERT_BIT_TEX2            BITFIELD64_BIT(VERT_ATTRIB_TEX2)
 187 #define VERT_BIT_TEX3            BITFIELD64_BIT(VERT_ATTRIB_TEX3)
 188 #define VERT_BIT_TEX4            BITFIELD64_BIT(VERT_ATTRIB_TEX4)
 189 #define VERT_BIT_TEX5            BITFIELD64_BIT(VERT_ATTRIB_TEX5)
 190 #define VERT_BIT_TEX6            BITFIELD64_BIT(VERT_ATTRIB_TEX6)
 191 #define VERT_BIT_TEX7            BITFIELD64_BIT(VERT_ATTRIB_TEX7)
 192 #define VERT_BIT_POINT_SIZE      BITFIELD64_BIT(VERT_ATTRIB_POINT_SIZE)
 193 #define VERT_BIT_GENERIC0        BITFIELD64_BIT(VERT_ATTRIB_GENERIC0)
 194
 195 #define VERT_BIT(i)              BITFIELD64_BIT(i)
 196 #define VERT_BIT_ALL             (BITFIELD64_BIT(VERT_ATTRIB_MAX) - 1)
 197
 198 #define VERT_BIT_FF(i)           VERT_BIT(i)
 199 #define VERT_BIT_FF_ALL          (BITFIELD64_BIT(VERT_ATTRIB_FF_MAX) - 1)
 200 #define VERT_BIT_TEX(i)          VERT_BIT(VERT_ATTRIB_TEX(i))
 201 #define VERT_BIT_TEX_ALL         \
 202   ((BITFIELD64_BIT(VERT_ATTRIB_TEX_MAX) - 1) << VERT_ATTRIB_TEX(0))
 203 #define VERT_BIT_GENERIC_NV(i)   VERT_BIT(VERT_ATTRIB_GENERIC_NV(i))
 204 #define VERT_BIT_GENERIC_NV_ALL  \
 205   ((BITFIELD64_BIT(VERT_ATTRIB_GENERIC_NV_MAX) - 1) << (VERT_ATTRIB_GENERIC_NV(0)))
 206 #define VERT_BIT_GENERIC(i)      VERT_BIT(VERT_ATTRIB_GENERIC(i))
 207 #define VERT_BIT_GENERIC_ALL     \
 208   ((BITFIELD64_BIT(VERT_ATTRIB_GENERIC_MAX) - 1) << (VERT_ATTRIB_GENERIC(0)))
 209 /*@}*/
 210
 211
 212 /**
 213  * Indexes for vertex program result attributes.  Note that
 214  * _mesa_vert_result_to_frag_attrib() and _mesa_frag_attrib_to_vert_result() make
 215  * assumptions about the layout of this enum.
 216  */
 217 typedef enum
 218 {
 219    VERT_RESULT_HPOS = 0,
 220    VERT_RESULT_COL0 = 1,
 221    VERT_RESULT_COL1 = 2,
 222    VERT_RESULT_FOGC = 3,
 223    VERT_RESULT_TEX0 = 4,
 224    VERT_RESULT_TEX1 = 5,
 225    VERT_RESULT_TEX2 = 6,
 226    VERT_RESULT_TEX3 = 7,
 227    VERT_RESULT_TEX4 = 8,
 228    VERT_RESULT_TEX5 = 9,
 229    VERT_RESULT_TEX6 = 10,
 230    VERT_RESULT_TEX7 = 11,
 231    VERT_RESULT_PSIZ = 12,
 232    VERT_RESULT_BFC0 = 13,
 233    VERT_RESULT_BFC1 = 14,
 234    VERT_RESULT_EDGE = 15,
 235    VERT_RESULT_CLIP_VERTEX = 16,
 236    VERT_RESULT_CLIP_DIST0 = 17,
 237    VERT_RESULT_CLIP_DIST1 = 18,
 238    VERT_RESULT_VAR0 = 19,  /**< shader varying */
 239    VERT_RESULT_MAX = (VERT_RESULT_VAR0 + MAX_VARYING)
 240 } gl_vert_result;
 241
 242
 243 /*********************************************/
 244
 245 /**
 246  * Indexes for geometry program attributes.
 247  */
 248 typedef enum
 249 {
 250    GEOM_ATTRIB_POSITION = 0,
 251    GEOM_ATTRIB_COLOR0 = 1,
 252    GEOM_ATTRIB_COLOR1 = 2,
 253    GEOM_ATTRIB_SECONDARY_COLOR0 = 3,
 254    GEOM_ATTRIB_SECONDARY_COLOR1 = 4,
 255    GEOM_ATTRIB_FOG_FRAG_COORD = 5,
 256    GEOM_ATTRIB_POINT_SIZE = 6,
 257    GEOM_ATTRIB_CLIP_VERTEX = 7,
 258    GEOM_ATTRIB_PRIMITIVE_ID = 8,
 259    GEOM_ATTRIB_TEX_COORD = 9,
 260
 261    GEOM_ATTRIB_VAR0 = 16,
 262    GEOM_ATTRIB_MAX = (GEOM_ATTRIB_VAR0 + MAX_VARYING)
 263 } gl_geom_attrib;
 264
 265 /**
 266  * Bitflags for geometry attributes.
 267  * These are used in bitfields in many places.
 268  */
 269 /*@{*/
 270 #define GEOM_BIT_COLOR0      (1 << GEOM_ATTRIB_COLOR0)
 271 #define GEOM_BIT_COLOR1      (1 << GEOM_ATTRIB_COLOR1)
 272 #define GEOM_BIT_SCOLOR0     (1 << GEOM_ATTRIB_SECONDARY_COLOR0)
 273 #define GEOM_BIT_SCOLOR1     (1 << GEOM_ATTRIB_SECONDARY_COLOR1)
 274 #define GEOM_BIT_TEX_COORD   (1 << GEOM_ATTRIB_TEX_COORD)
 275 #define GEOM_BIT_FOG_COORD   (1 << GEOM_ATTRIB_FOG_FRAG_COORD)
 276 #define GEOM_BIT_POSITION    (1 << GEOM_ATTRIB_POSITION)
 277 #define GEOM_BIT_POINT_SIDE  (1 << GEOM_ATTRIB_POINT_SIZE)
 278 #define GEOM_BIT_CLIP_VERTEX (1 << GEOM_ATTRIB_CLIP_VERTEX)
 279 #define GEOM_BIT_PRIM_ID     (1 << GEOM_ATTRIB_PRIMITIVE_ID)
 280 #define GEOM_BIT_VAR0        (1 << GEOM_ATTRIB_VAR0)
 281
 282 #define GEOM_BIT_VAR(g)  (1 << (GEOM_BIT_VAR0 + (g)))
 283 /*@}*/
 284
 285
 286 /**
 287  * Indexes for geometry program result attributes
 288  */
 289 typedef enum
 290 {
 291    GEOM_RESULT_POS  = 0,
 292    GEOM_RESULT_COL0  = 1,
 293    GEOM_RESULT_COL1  = 2,
 294    GEOM_RESULT_SCOL0 = 3,
 295    GEOM_RESULT_SCOL1 = 4,
 296    GEOM_RESULT_FOGC = 5,
 297    GEOM_RESULT_TEX0 = 6,
 298    GEOM_RESULT_TEX1 = 7,
 299    GEOM_RESULT_TEX2 = 8,
 300    GEOM_RESULT_TEX3 = 9,
 301    GEOM_RESULT_TEX4 = 10,
 302    GEOM_RESULT_TEX5 = 11,
 303    GEOM_RESULT_TEX6 = 12,
 304    GEOM_RESULT_TEX7 = 13,
 305    GEOM_RESULT_PSIZ = 14,
 306    GEOM_RESULT_CLPV = 15,
 307    GEOM_RESULT_PRID = 16,
 308    GEOM_RESULT_LAYR = 17,
 309    GEOM_RESULT_VAR0 = 18,  /**< shader varying, should really be 16 */
 310    /* ### we need to -2 because var0 is 18 instead 16 like in the others */
 311    GEOM_RESULT_MAX  =  (GEOM_RESULT_VAR0 + MAX_VARYING - 2)
 312 } gl_geom_result;
 313
 314
 315 /**
 316  * Indexes for fragment program input attributes.  Note that
 317  * _mesa_vert_result_to_frag_attrib() and frag_attrib_to_vert_result() make
 318  * assumptions about the layout of this enum.
 319  */
 320 typedef enum
 321 {
 322    FRAG_ATTRIB_WPOS = 0,
 323    FRAG_ATTRIB_COL0 = 1,
 324    FRAG_ATTRIB_COL1 = 2,
 325    FRAG_ATTRIB_FOGC = 3,
 326    FRAG_ATTRIB_TEX0 = 4,
 327    FRAG_ATTRIB_TEX1 = 5,
 328    FRAG_ATTRIB_TEX2 = 6,
 329    FRAG_ATTRIB_TEX3 = 7,
 330    FRAG_ATTRIB_TEX4 = 8,
 331    FRAG_ATTRIB_TEX5 = 9,
 332    FRAG_ATTRIB_TEX6 = 10,
 333    FRAG_ATTRIB_TEX7 = 11,
 334    FRAG_ATTRIB_FACE = 12,  /**< front/back face */
 335    FRAG_ATTRIB_PNTC = 13,  /**< sprite/point coord */
 336    FRAG_ATTRIB_CLIP_DIST0 = 14,
 337    FRAG_ATTRIB_CLIP_DIST1 = 15,
 338    FRAG_ATTRIB_VAR0 = 16,  /**< shader varying */
 339    FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + MAX_VARYING)
 340 } gl_frag_attrib;
 341
 342
 343 /**
 344  * Convert from a gl_vert_result value to the corresponding gl_frag_attrib.
 345  *
 346  * VERT_RESULT_HPOS is converted to FRAG_ATTRIB_WPOS.
 347  *
 348  * gl_vert_result values which have no corresponding gl_frag_attrib
 349  * (VERT_RESULT_PSIZ, VERT_RESULT_BFC0, VERT_RESULT_BFC1, and
 350  * VERT_RESULT_EDGE) are converted to a value of -1.
 351  */
 352 static inline int
 353 _mesa_vert_result_to_frag_attrib(gl_vert_result vert_result)
 354 {
 355    if (vert_result >= VERT_RESULT_CLIP_DIST0)
 356       return vert_result - VERT_RESULT_CLIP_DIST0 + FRAG_ATTRIB_CLIP_DIST0;
 357    else if (vert_result <= VERT_RESULT_TEX7)
 358       return vert_result;
 359    else
 360       return -1;
 361 }
 362
 363
 364 /**
 365  * Convert from a gl_frag_attrib value to the corresponding gl_vert_result.
 366  *
 367  * FRAG_ATTRIB_WPOS is converted to VERT_RESULT_HPOS.
 368  *
 369  * gl_frag_attrib values which have no corresponding gl_vert_result
 370  * (FRAG_ATTRIB_FACE and FRAG_ATTRIB_PNTC) are converted to a value of -1.
 371  */
 372 static inline int
 373 _mesa_frag_attrib_to_vert_result(gl_frag_attrib frag_attrib)
 374 {
 375    if (frag_attrib <= FRAG_ATTRIB_TEX7)
 376       return frag_attrib;
 377    else if (frag_attrib >= FRAG_ATTRIB_CLIP_DIST0)
 378       return frag_attrib - FRAG_ATTRIB_CLIP_DIST0 + VERT_RESULT_CLIP_DIST0;
 379    else
 380       return -1;
 381 }
 382
 383
 384 /**
 385  * Bitflags for fragment program input attributes.
 386  */
 387 /*@{*/
 388 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 389 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 390 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 391 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 392 #define FRAG_BIT_FACE  (1 << FRAG_ATTRIB_FACE)
 393 #define FRAG_BIT_PNTC  (1 << FRAG_ATTRIB_PNTC)
 394 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 395 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 396 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 397 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 398 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 399 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 400 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 401 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 402 #define FRAG_BIT_VAR0  (1 << FRAG_ATTRIB_VAR0)
 403
 404 #define FRAG_BIT_TEX(U)  (FRAG_BIT_TEX0 << (U))
 405 #define FRAG_BIT_VAR(V)  (FRAG_BIT_VAR0 << (V))
 406
 407 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 408                            FRAG_BIT_TEX1|       \
 409                            FRAG_BIT_TEX2|       \
 410                            FRAG_BIT_TEX3|       \
 411                            FRAG_BIT_TEX4|       \
 412                            FRAG_BIT_TEX5|       \
 413                            FRAG_BIT_TEX6|       \
 414                            FRAG_BIT_TEX7)
 415 /*@}*/
 416
 417
 418 /**
 419  * Fragment program results
 420  */
 421 typedef enum
 422 {
 423    FRAG_RESULT_DEPTH = 0,
 424    FRAG_RESULT_STENCIL = 1,
 425    /* If a single color should be written to all render targets, this
 426     * register is written.  No FRAG_RESULT_DATAn will be written.
 427     */
 428    FRAG_RESULT_COLOR = 2,
 429
 430    /* FRAG_RESULT_DATAn are the per-render-target (GLSL gl_FragData[n]
 431     * or ARB_fragment_program fragment.color[n]) color results.  If
 432     * any are written, FRAG_RESULT_COLOR will not be written.
 433     */
 434    FRAG_RESULT_DATA0 = 3,
 435    FRAG_RESULT_MAX = (FRAG_RESULT_DATA0 + MAX_DRAW_BUFFERS)
 436 } gl_frag_result;
 437
 438
 439 /**
 440  * Indexes for all renderbuffers
 441  */
 442 typedef enum
 443 {
 444    /* the four standard color buffers */
 445    BUFFER_FRONT_LEFT,
 446    BUFFER_BACK_LEFT,
 447    BUFFER_FRONT_RIGHT,
 448    BUFFER_BACK_RIGHT,
 449    BUFFER_DEPTH,
 450    BUFFER_STENCIL,
 451    BUFFER_ACCUM,
 452    /* optional aux buffer */
 453    BUFFER_AUX0,
 454    /* generic renderbuffers */
 455    BUFFER_COLOR0,
 456    BUFFER_COLOR1,
 457    BUFFER_COLOR2,
 458    BUFFER_COLOR3,
 459    BUFFER_COLOR4,
 460    BUFFER_COLOR5,
 461    BUFFER_COLOR6,
 462    BUFFER_COLOR7,
 463    BUFFER_COUNT
 464 } gl_buffer_index;
 465
 466 /**
 467  * Bit flags for all renderbuffers
 468  */
 469 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 470 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 471 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 472 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 473 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 474 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 475 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 476 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 477 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 478 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 479 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 480 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 481 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 482 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 483 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 484 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 485 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 486 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 487 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 488
 489 /**
 490  * Mask of all the color buffer bits (but not accum).
 491  */
 492 #define BUFFER_BITS_COLOR  (BUFFER_BIT_FRONT_LEFT | \
 493                             BUFFER_BIT_BACK_LEFT | \
 494                             BUFFER_BIT_FRONT_RIGHT | \
 495                             BUFFER_BIT_BACK_RIGHT | \
 496                             BUFFER_BIT_AUX0 | \
 497                             BUFFER_BIT_COLOR0 | \
 498                             BUFFER_BIT_COLOR1 | \
 499                             BUFFER_BIT_COLOR2 | \
 500                             BUFFER_BIT_COLOR3 | \
 501                             BUFFER_BIT_COLOR4 | \
 502                             BUFFER_BIT_COLOR5 | \
 503                             BUFFER_BIT_COLOR6 | \
 504                             BUFFER_BIT_COLOR7)
 505
 506
 507 /**
 508  * Framebuffer configuration (aka visual / pixelformat)
 509  * Note: some of these fields should be boolean, but it appears that
 510  * code in drivers/dri/common/util.c requires int-sized fields.
 511  */
 512 struct gl_config
 513 {
 514    GLboolean rgbMode;
 515    GLboolean floatMode;
 516    GLboolean colorIndexMode;  /* XXX is this used anywhere? */
 517    GLuint doubleBufferMode;
 518    GLuint stereoMode;
 519
 520    GLboolean haveAccumBuffer;
 521    GLboolean haveDepthBuffer;
 522    GLboolean haveStencilBuffer;
 523
 524    GLint redBits, greenBits, blueBits, alphaBits;       /* bits per comp */
 525    GLuint redMask, greenMask, blueMask, alphaMask;
 526    GLint rgbBits;               /* total bits for rgb */
 527    GLint indexBits;             /* total bits for colorindex */
 528
 529    GLint accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits;
 530    GLint depthBits;
 531    GLint stencilBits;
 532
 533    GLint numAuxBuffers;
 534
 535    GLint level;
 536
 537    /* EXT_visual_rating / GLX 1.2 */
 538    GLint visualRating;
 539
 540    /* EXT_visual_info / GLX 1.2 */
 541    GLint transparentPixel;
 542    /*    colors are floats scaled to ints */
 543    GLint transparentRed, transparentGreen, transparentBlue, transparentAlpha;
 544    GLint transparentIndex;
 545
 546    /* ARB_multisample / SGIS_multisample */
 547    GLint sampleBuffers;
 548    GLint samples;
 549
 550    /* SGIX_pbuffer / GLX 1.3 */
 551    GLint maxPbufferWidth;
 552    GLint maxPbufferHeight;
 553    GLint maxPbufferPixels;
 554    GLint optimalPbufferWidth;   /* Only for SGIX_pbuffer. */
 555    GLint optimalPbufferHeight;  /* Only for SGIX_pbuffer. */
 556
 557    /* OML_swap_method */
 558    GLint swapMethod;
 559
 560    /* EXT_texture_from_pixmap */
 561    GLint bindToTextureRgb;
 562    GLint bindToTextureRgba;
 563    GLint bindToMipmapTexture;
 564    GLint bindToTextureTargets;
 565    GLint yInverted;
 566
 567    /* EXT_framebuffer_sRGB */
 568    GLint sRGBCapable;
 569 };
 570
 571
 572 /**
 573  * \name Bit flags used for updating material values.
 574  */
 575 /*@{*/
 576 #define MAT_ATTRIB_FRONT_AMBIENT           0
 577 #define MAT_ATTRIB_BACK_AMBIENT            1
 578 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 579 #define MAT_ATTRIB_BACK_DIFFUSE            3
 580 #define MAT_ATTRIB_FRONT_SPECULAR          4
 581 #define MAT_ATTRIB_BACK_SPECULAR           5
 582 #define MAT_ATTRIB_FRONT_EMISSION          6
 583 #define MAT_ATTRIB_BACK_EMISSION           7
 584 #define MAT_ATTRIB_FRONT_SHININESS         8
 585 #define MAT_ATTRIB_BACK_SHININESS          9
 586 #define MAT_ATTRIB_FRONT_INDEXES           10
 587 #define MAT_ATTRIB_BACK_INDEXES            11
 588 #define MAT_ATTRIB_MAX                     12
 589
 590 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 591 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 592 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 593 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 594 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 595 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 596
 597 #define MAT_INDEX_AMBIENT  0
 598 #define MAT_INDEX_DIFFUSE  1
 599 #define MAT_INDEX_SPECULAR 2
 600
 601 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 602 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 603 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 604 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 605 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 606 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 607 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 608 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 609 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 610 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 611 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 612 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 613
 614
 615 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 616                                  MAT_BIT_FRONT_AMBIENT |        \
 617                                  MAT_BIT_FRONT_DIFFUSE |        \
 618                                  MAT_BIT_FRONT_SPECULAR |       \
 619                                  MAT_BIT_FRONT_SHININESS |      \
 620                                  MAT_BIT_FRONT_INDEXES)
 621
 622 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 623                                  MAT_BIT_BACK_AMBIENT |         \
 624                                  MAT_BIT_BACK_DIFFUSE |         \
 625                                  MAT_BIT_BACK_SPECULAR |        \
 626                                  MAT_BIT_BACK_SHININESS |       \
 627                                  MAT_BIT_BACK_INDEXES)
 628
 629 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 630 /*@}*/
 631
 632
 633 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 634 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 635
 636 /**
 637  * Material shininess lookup table.
 638  */
 639 struct gl_shine_tab
 640 {
 641    struct gl_shine_tab *next, *prev;
 642    GLfloat tab[SHINE_TABLE_SIZE+1];
 643    GLfloat shininess;
 644    GLuint refcount;
 645 };
 646
 647
 648 /**
 649  * Light source state.
 650  */
 651 struct gl_light
 652 {
 653    struct gl_light *next;       /**< double linked list with sentinel */
 654    struct gl_light *prev;
 655
 656    GLfloat Ambient[4];          /**< ambient color */
 657    GLfloat Diffuse[4];          /**< diffuse color */
 658    GLfloat Specular[4];         /**< specular color */
 659    GLfloat EyePosition[4];      /**< position in eye coordinates */
 660    GLfloat SpotDirection[4];    /**< spotlight direction in eye coordinates */
 661    GLfloat SpotExponent;
 662    GLfloat SpotCutoff;          /**< in degrees */
 663    GLfloat _CosCutoffNeg;       /**< = cos(SpotCutoff) */
 664    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 665    GLfloat ConstantAttenuation;
 666    GLfloat LinearAttenuation;
 667    GLfloat QuadraticAttenuation;
 668    GLboolean Enabled;           /**< On/off flag */
 669
 670    /**
 671     * \name Derived fields
 672     */
 673    /*@{*/
 674    GLbitfield _Flags;           /**< State */
 675
 676    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 677    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 678    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 679    GLfloat _NormSpotDirection[4]; /**< normalized spotlight direction */
 680    GLfloat _VP_inf_spot_attenuation;
 681
 682    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 683    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 684    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 685    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 686    GLfloat _dli;                /**< CI diffuse light intensity */
 687    GLfloat _sli;                /**< CI specular light intensity */
 688    /*@}*/
 689 };
 690
 691
 692 /**
 693  * Light model state.
 694  */
 695 struct gl_lightmodel
 696 {
 697    GLfloat Ambient[4];          /**< ambient color */
 698    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 699    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 700    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 701                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 702 };
 703
 704
 705 /**
 706  * Material state.
 707  */
 708 struct gl_material
 709 {
 710    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 711 };
 712
 713
 714 /**
 715  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 716  */
 717 struct gl_accum_attrib
 718 {
 719    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 720 };
 721
 722
 723 /**
 724  * Used for storing clear color, texture border color, etc.
 725  * The float values are typically unclamped.
 726  */
 727 union gl_color_union
 728 {
 729    GLfloat f[4];
 730    GLint i[4];
 731    GLuint ui[4];
 732 };
 733
 734
 735 /**
 736  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 737  */
 738 struct gl_colorbuffer_attrib
 739 {
 740    GLuint ClearIndex;                      /**< Index for glClear */
 741    union gl_color_union ClearColor;        /**< Color for glClear, unclamped */
 742    GLuint IndexMask;                       /**< Color index write mask */
 743    GLubyte ColorMask[MAX_DRAW_BUFFERS][4]; /**< Each flag is 0xff or 0x0 */
 744
 745    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 746
 747    /**
 748     * \name alpha testing
 749     */
 750    /*@{*/
 751    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 752    GLenum AlphaFunc;                    /**< Alpha test function */
 753    GLfloat AlphaRefUnclamped;
 754    GLclampf AlphaRef;                   /**< Alpha reference value */
 755    /*@}*/
 756
 757    /**
 758     * \name Blending
 759     */
 760    /*@{*/
 761    GLbitfield BlendEnabled;             /**< Per-buffer blend enable flags */
 762
 763    /* NOTE: this does _not_ depend on fragment clamping or any other clamping
 764     * control, only on the fixed-pointness of the render target.
 765     * The query does however depend on fragment color clamping.
 766     */
 767    GLfloat BlendColorUnclamped[4];               /**< Blending color */
 768    GLfloat BlendColor[4];               /**< Blending color */
 769
 770    struct
 771    {
 772       GLenum SrcRGB;             /**< RGB blend source term */
 773       GLenum DstRGB;             /**< RGB blend dest term */
 774       GLenum SrcA;               /**< Alpha blend source term */
 775       GLenum DstA;               /**< Alpha blend dest term */
 776       GLenum EquationRGB;        /**< GL_ADD, GL_SUBTRACT, etc. */
 777       GLenum EquationA;          /**< GL_ADD, GL_SUBTRACT, etc. */
 778    } Blend[MAX_DRAW_BUFFERS];
 779    /** Are the blend func terms currently different for each buffer/target? */
 780    GLboolean _BlendFuncPerBuffer;
 781    /** Are the blend equations currently different for each buffer/target? */
 782    GLboolean _BlendEquationPerBuffer;
 783    /*@}*/
 784
 785    /**
 786     * \name Logic op
 787     */
 788    /*@{*/
 789    GLenum LogicOp;                      /**< Logic operator */
 790    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 791    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 792    /*@}*/
 793
 794    GLboolean DitherFlag;                /**< Dither enable flag */
 795
 796    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 797    GLboolean _ClampFragmentColor; /** < with GL_FIXED_ONLY_ARB resolved */
 798    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 799    GLboolean _ClampReadColor;     /** < with GL_FIXED_ONLY_ARB resolved */
 800
 801    GLboolean sRGBEnabled;       /**< Framebuffer sRGB blending/updating requested */
 802 };
 803
 804
 805 /**
 806  * Current attribute group (GL_CURRENT_BIT).
 807  */
 808 struct gl_current_attrib
 809 {
 810    /**
 811     * \name Current vertex attributes.
 812     * \note Values are valid only after FLUSH_VERTICES has been called.
 813     * \note Index and Edgeflag current values are stored as floats in the
 814     * SIX and SEVEN attribute slots.
 815     */
 816    GLfloat Attrib[VERT_ATTRIB_MAX][4];  /**< Position, color, texcoords, etc */
 817
 818    /**
 819     * \name Current raster position attributes (always valid).
 820     * \note This set of attributes is very similar to the SWvertex struct.
 821     */
 822    /*@{*/
 823    GLfloat RasterPos[4];
 824    GLfloat RasterDistance;
 825    GLfloat RasterColor[4];
 826    GLfloat RasterSecondaryColor[4];
 827    GLfloat RasterTexCoords[MAX_TEXTURE_COORD_UNITS][4];
 828    GLboolean RasterPosValid;
 829    /*@}*/
 830 };
 831
 832
 833 /**
 834  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 835  */
 836 struct gl_depthbuffer_attrib
 837 {
 838    GLenum Func;                 /**< Function for depth buffer compare */
 839    GLclampd Clear;              /**< Value to clear depth buffer to */
 840    GLboolean Test;              /**< Depth buffering enabled flag */
 841    GLboolean Mask;              /**< Depth buffer writable? */
 842    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 843    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 844 };
 845
 846
 847 /**
 848  * Evaluator attribute group (GL_EVAL_BIT).
 849  */
 850 struct gl_eval_attrib
 851 {
 852    /**
 853     * \name Enable bits
 854     */
 855    /*@{*/
 856    GLboolean Map1Color4;
 857    GLboolean Map1Index;
 858    GLboolean Map1Normal;
 859    GLboolean Map1TextureCoord1;
 860    GLboolean Map1TextureCoord2;
 861    GLboolean Map1TextureCoord3;
 862    GLboolean Map1TextureCoord4;
 863    GLboolean Map1Vertex3;
 864    GLboolean Map1Vertex4;
 865    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 866    GLboolean Map2Color4;
 867    GLboolean Map2Index;
 868    GLboolean Map2Normal;
 869    GLboolean Map2TextureCoord1;
 870    GLboolean Map2TextureCoord2;
 871    GLboolean Map2TextureCoord3;
 872    GLboolean Map2TextureCoord4;
 873    GLboolean Map2Vertex3;
 874    GLboolean Map2Vertex4;
 875    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 876    GLboolean AutoNormal;
 877    /*@}*/
 878
 879    /**
 880     * \name Map Grid endpoints and divisions and calculated du values
 881     */
 882    /*@{*/
 883    GLint MapGrid1un;
 884    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 885    GLint MapGrid2un, MapGrid2vn;
 886    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 887    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 888    /*@}*/
 889 };
 890
 891
 892 /**
 893  * Fog attribute group (GL_FOG_BIT).
 894  */
 895 struct gl_fog_attrib
 896 {
 897    GLboolean Enabled;           /**< Fog enabled flag */
 898    GLfloat ColorUnclamped[4];            /**< Fog color */
 899    GLfloat Color[4];            /**< Fog color */
 900    GLfloat Density;             /**< Density >= 0.0 */
 901    GLfloat Start;               /**< Start distance in eye coords */
 902    GLfloat End;                 /**< End distance in eye coords */
 903    GLfloat Index;               /**< Fog index */
 904    GLenum Mode;                 /**< Fog mode */
 905    GLboolean ColorSumEnabled;
 906    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 907    GLfloat _Scale;              /**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
 908    GLenum FogDistanceMode;     /**< GL_NV_fog_distance */
 909 };
 910
 911
 912 /**
 913  * \brief Layout qualifiers for gl_FragDepth.
 914  *
 915  * Extension AMD_conservative_depth allows gl_FragDepth to be redeclared with
 916  * a layout qualifier.
 917  *
 918  * \see enum ir_depth_layout
 919  */
 920 enum gl_frag_depth_layout {
 921     FRAG_DEPTH_LAYOUT_NONE, /**< No layout is specified. */
 922     FRAG_DEPTH_LAYOUT_ANY,
 923     FRAG_DEPTH_LAYOUT_GREATER,
 924     FRAG_DEPTH_LAYOUT_LESS,
 925     FRAG_DEPTH_LAYOUT_UNCHANGED
 926 };
 927
 928
 929 /**
 930  * Hint attribute group (GL_HINT_BIT).
 931  *
 932  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 933  */
 934 struct gl_hint_attrib
 935 {
 936    GLenum PerspectiveCorrection;
 937    GLenum PointSmooth;
 938    GLenum LineSmooth;
 939    GLenum PolygonSmooth;
 940    GLenum Fog;
 941    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 942    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 943    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 944    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 945 };
 946
 947 /**
 948  * Light state flags.
 949  */
 950 /*@{*/
 951 #define LIGHT_SPOT         0x1
 952 #define LIGHT_LOCAL_VIEWER 0x2
 953 #define LIGHT_POSITIONAL   0x4
 954 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 955 /*@}*/
 956
 957
 958 /**
 959  * Lighting attribute group (GL_LIGHT_BIT).
 960  */
 961 struct gl_light_attrib
 962 {
 963    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 964    struct gl_lightmodel Model;          /**< Lighting model */
 965
 966    /**
 967     * Must flush FLUSH_VERTICES before referencing:
 968     */
 969    /*@{*/
 970    struct gl_material Material;         /**< Includes front & back values */
 971    /*@}*/
 972
 973    GLboolean Enabled;                   /**< Lighting enabled flag */
 974    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 975    GLenum ProvokingVertex;              /**< GL_EXT_provoking_vertex */
 976    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 977    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 978    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 979    GLboolean ColorMaterialEnabled;
 980    GLenum ClampVertexColor;
 981    GLboolean _ClampVertexColor;
 982
 983    struct gl_light EnabledList;         /**< List sentinel */
 984
 985    /**
 986     * Derived state for optimizations:
 987     */
 988    /*@{*/
 989    GLboolean _NeedEyeCoords;
 990    GLboolean _NeedVertices;             /**< Use fast shader? */
 991    GLbitfield _Flags;                   /**< LIGHT_* flags, see above */
 992    GLfloat _BaseColor[2][3];
 993    /*@}*/
 994 };
 995
 996
 997 /**
 998  * Line attribute group (GL_LINE_BIT).
 999  */
1000 struct gl_line_attrib
1001 {
1002    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
1003    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
1004    GLushort StipplePattern;     /**< Stipple pattern */
1005    GLint StippleFactor;         /**< Stipple repeat factor */
1006    GLfloat Width;               /**< Line width */
1007 };
1008
1009
1010 /**
1011  * Display list attribute group (GL_LIST_BIT).
1012  */
1013 struct gl_list_attrib
1014 {
1015    GLuint ListBase;
1016 };
1017
1018
1019 /**
1020  * Multisample attribute group (GL_MULTISAMPLE_BIT).
1021  */
1022 struct gl_multisample_attrib
1023 {
1024    GLboolean Enabled;
1025    GLboolean _Enabled;   /**< true if Enabled and multisample buffer */
1026    GLboolean SampleAlphaToCoverage;
1027    GLboolean SampleAlphaToOne;
1028    GLboolean SampleCoverage;
1029    GLfloat SampleCoverageValue;
1030    GLboolean SampleCoverageInvert;
1031 };
1032
1033
1034 /**
1035  * A pixelmap (see glPixelMap)
1036  */
1037 struct gl_pixelmap
1038 {
1039    GLint Size;
1040    GLfloat Map[MAX_PIXEL_MAP_TABLE];
1041    GLubyte Map8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
1042 };
1043
1044
1045 /**
1046  * Collection of all pixelmaps
1047  */
1048 struct gl_pixelmaps
1049 {
1050    struct gl_pixelmap RtoR;  /**< i.e. GL_PIXEL_MAP_R_TO_R */
1051    struct gl_pixelmap GtoG;
1052    struct gl_pixelmap BtoB;
1053    struct gl_pixelmap AtoA;
1054    struct gl_pixelmap ItoR;
1055    struct gl_pixelmap ItoG;
1056    struct gl_pixelmap ItoB;
1057    struct gl_pixelmap ItoA;
1058    struct gl_pixelmap ItoI;
1059    struct gl_pixelmap StoS;
1060 };
1061
1062
1063 /**
1064  * Pixel attribute group (GL_PIXEL_MODE_BIT).
1065  */
1066 struct gl_pixel_attrib
1067 {
1068    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
1069
1070    /*--- Begin Pixel Transfer State ---*/
1071    /* Fields are in the order in which they're applied... */
1072
1073    /** Scale & Bias (index shift, offset) */
1074    /*@{*/
1075    GLfloat RedBias, RedScale;
1076    GLfloat GreenBias, GreenScale;
1077    GLfloat BlueBias, BlueScale;
1078    GLfloat AlphaBias, AlphaScale;
1079    GLfloat DepthBias, DepthScale;
1080    GLint IndexShift, IndexOffset;
1081    /*@}*/
1082
1083    /* Pixel Maps */
1084    /* Note: actual pixel maps are not part of this attrib group */
1085    GLboolean MapColorFlag;
1086    GLboolean MapStencilFlag;
1087
1088    /*--- End Pixel Transfer State ---*/
1089
1090    /** glPixelZoom */
1091    GLfloat ZoomX, ZoomY;
1092 };
1093
1094
1095 /**
1096  * Point attribute group (GL_POINT_BIT).
1097  */
1098 struct gl_point_attrib
1099 {
1100    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1101    GLfloat Size;                /**< User-specified point size */
1102    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1103    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1104    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1105    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1106    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
1107    GLboolean CoordReplace[MAX_TEXTURE_COORD_UNITS]; /**< GL_ARB_point_sprite*/
1108    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1109    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1110 };
1111
1112
1113 /**
1114  * Polygon attribute group (GL_POLYGON_BIT).
1115  */
1116 struct gl_polygon_attrib
1117 {
1118    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1119    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1120    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1121    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1122    GLboolean CullFlag;          /**< Culling on/off flag */
1123    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1124    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1125    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1126    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1127    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1128    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1129    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1130    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1131 };
1132
1133
1134 /**
1135  * Scissor attributes (GL_SCISSOR_BIT).
1136  */
1137 struct gl_scissor_attrib
1138 {
1139    GLboolean Enabled;           /**< Scissor test enabled? */
1140    GLint X, Y;                  /**< Lower left corner of box */
1141    GLsizei Width, Height;       /**< Size of box */
1142 };
1143
1144
1145 /**
1146  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1147  *
1148  * Three sets of stencil data are tracked so that OpenGL 2.0,
1149  * GL_EXT_stencil_two_side, and GL_ATI_separate_stencil can all be supported
1150  * simultaneously.  In each of the stencil state arrays, element 0 corresponds
1151  * to GL_FRONT.  Element 1 corresponds to the OpenGL 2.0 /
1152  * GL_ATI_separate_stencil GL_BACK state.  Element 2 corresponds to the
1153  * GL_EXT_stencil_two_side GL_BACK state.
1154  *
1155  * The derived value \c _BackFace is either 1 or 2 depending on whether or
1156  * not GL_STENCIL_TEST_TWO_SIDE_EXT is enabled.
1157  *
1158  * The derived value \c _TestTwoSide is set when the front-face and back-face
1159  * stencil state are different.
1160  */
1161 struct gl_stencil_attrib
1162 {
1163    GLboolean Enabled;           /**< Enabled flag */
1164    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1165    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 2) */
1166    GLboolean _Enabled;          /**< Enabled and stencil buffer present */
1167    GLboolean _TestTwoSide;
1168    GLubyte _BackFace;           /**< Current back stencil state (1 or 2) */
1169    GLenum Function[3];          /**< Stencil function */
1170    GLenum FailFunc[3];          /**< Fail function */
1171    GLenum ZPassFunc[3];         /**< Depth buffer pass function */
1172    GLenum ZFailFunc[3];         /**< Depth buffer fail function */
1173    GLint Ref[3];                /**< Reference value */
1174    GLuint ValueMask[3];         /**< Value mask */
1175    GLuint WriteMask[3];         /**< Write mask */
1176    GLuint Clear;                /**< Clear value */
1177 };
1178
1179
1180 /**
1181  * An index for each type of texture object.  These correspond to the GL
1182  * texture target enums, such as GL_TEXTURE_2D, GL_TEXTURE_CUBE_MAP, etc.
1183  * Note: the order is from highest priority to lowest priority.
1184  */
1185 typedef enum
1186 {
1187    TEXTURE_BUFFER_INDEX,
1188    TEXTURE_2D_ARRAY_INDEX,
1189    TEXTURE_1D_ARRAY_INDEX,
1190    TEXTURE_EXTERNAL_INDEX,
1191    TEXTURE_CUBE_INDEX,
1192    TEXTURE_3D_INDEX,
1193    TEXTURE_RECT_INDEX,
1194    TEXTURE_2D_INDEX,
1195    TEXTURE_1D_INDEX,
1196    NUM_TEXTURE_TARGETS
1197 } gl_texture_index;
1198
1199
1200 /**
1201  * Bit flags for each type of texture object
1202  * Used for Texture.Unit[]._ReallyEnabled flags.
1203  */
1204 /*@{*/
1205 #define TEXTURE_BUFFER_BIT   (1 << TEXTURE_BUFFER_INDEX)
1206 #define TEXTURE_2D_ARRAY_BIT (1 << TEXTURE_2D_ARRAY_INDEX)
1207 #define TEXTURE_1D_ARRAY_BIT (1 << TEXTURE_1D_ARRAY_INDEX)
1208 #define TEXTURE_EXTERNAL_BIT (1 << TEXTURE_EXTERNAL_INDEX)
1209 #define TEXTURE_CUBE_BIT     (1 << TEXTURE_CUBE_INDEX)
1210 #define TEXTURE_3D_BIT       (1 << TEXTURE_3D_INDEX)
1211 #define TEXTURE_RECT_BIT     (1 << TEXTURE_RECT_INDEX)
1212 #define TEXTURE_2D_BIT       (1 << TEXTURE_2D_INDEX)
1213 #define TEXTURE_1D_BIT       (1 << TEXTURE_1D_INDEX)
1214 /*@}*/
1215
1216
1217 /**
1218  * TexGenEnabled flags.
1219  */
1220 /*@{*/
1221 #define S_BIT 1
1222 #define T_BIT 2
1223 #define R_BIT 4
1224 #define Q_BIT 8
1225 #define STR_BITS (S_BIT | T_BIT | R_BIT)
1226 /*@}*/
1227
1228
1229 /**
1230  * Bit flag versions of the corresponding GL_ constants.
1231  */
1232 /*@{*/
1233 #define TEXGEN_SPHERE_MAP        0x1
1234 #define TEXGEN_OBJ_LINEAR        0x2
1235 #define TEXGEN_EYE_LINEAR        0x4
1236 #define TEXGEN_REFLECTION_MAP_NV 0x8
1237 #define TEXGEN_NORMAL_MAP_NV     0x10
1238
1239 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1240                                   TEXGEN_REFLECTION_MAP_NV | \
1241                                   TEXGEN_NORMAL_MAP_NV)
1242 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1243                                   TEXGEN_REFLECTION_MAP_NV | \
1244                                   TEXGEN_NORMAL_MAP_NV     | \
1245                                   TEXGEN_EYE_LINEAR)
1246 /*@}*/
1247
1248
1249
1250 /** Tex-gen enabled for texture unit? */
1251 #define ENABLE_TEXGEN(unit) (1 << (unit))
1252
1253 /** Non-identity texture matrix for texture unit? */
1254 #define ENABLE_TEXMAT(unit) (1 << (unit))
1255
1256
1257 /**
1258  * Texture image state.  Drivers will typically create a subclass of this
1259  * with extra fields for memory buffers, etc.
1260  */
1261 struct gl_texture_image
1262 {
1263    GLint InternalFormat;        /**< Internal format as given by the user */
1264    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1265                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1266                                  *   GL_INTENSITY, GL_DEPTH_COMPONENT or
1267                                  *   GL_DEPTH_STENCIL_EXT only. Used for
1268                                  *   choosing TexEnv arithmetic.
1269                                  */
1270    gl_format TexFormat;         /**< The actual texture memory format */
1271
1272    GLuint Border;               /**< 0 or 1 */
1273    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1274    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1275    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1276    GLuint Width2;               /**< = Width - 2*Border */
1277    GLuint Height2;              /**< = Height - 2*Border */
1278    GLuint Depth2;               /**< = Depth - 2*Border */
1279    GLuint WidthLog2;            /**< = log2(Width2) */
1280    GLuint HeightLog2;           /**< = log2(Height2) */
1281    GLuint DepthLog2;            /**< = log2(Depth2) */
1282    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1283
1284    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1285    GLuint Level;                /**< Which mipmap level am I? */
1286    /** Cube map face: index into gl_texture_object::Image[] array */
1287    GLuint Face;
1288 };
1289
1290
1291 /**
1292  * Indexes for cube map faces.
1293  */
1294 typedef enum
1295 {
1296    FACE_POS_X = 0,
1297    FACE_NEG_X = 1,
1298    FACE_POS_Y = 2,
1299    FACE_NEG_Y = 3,
1300    FACE_POS_Z = 4,
1301    FACE_NEG_Z = 5,
1302    MAX_FACES = 6
1303 } gl_face_index;
1304
1305
1306 /**
1307  * Sampler object state.  These objects are new with GL_ARB_sampler_objects
1308  * and OpenGL 3.3.  Legacy texture objects also contain a sampler object.
1309  */
1310 struct gl_sampler_object
1311 {
1312    GLuint Name;
1313    GLint RefCount;
1314
1315    GLenum WrapS;                /**< S-axis texture image wrap mode */
1316    GLenum WrapT;                /**< T-axis texture image wrap mode */
1317    GLenum WrapR;                /**< R-axis texture image wrap mode */
1318    GLenum MinFilter;            /**< minification filter */
1319    GLenum MagFilter;            /**< magnification filter */
1320    union gl_color_union BorderColor;  /**< Interpreted according to texture format */
1321    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1322    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1323    GLfloat LodBias;             /**< OpenGL 1.4 */
1324    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1325    GLenum CompareMode;          /**< GL_ARB_shadow */
1326    GLenum CompareFunc;          /**< GL_ARB_shadow */
1327    GLfloat CompareFailValue;    /**< GL_ARB_shadow_ambient */
1328    GLenum sRGBDecode;           /**< GL_DECODE_EXT or GL_SKIP_DECODE_EXT */
1329    GLboolean CubeMapSeamless;   /**< GL_AMD_seamless_cubemap_per_texture */
1330
1331    /* deprecated sampler state */
1332    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1333 };
1334
1335
1336 /**
1337  * Texture object state.  Contains the array of mipmap images, border color,
1338  * wrap modes, filter modes, and shadow/texcompare state.
1339  */
1340 struct gl_texture_object
1341 {
1342    _glthread_Mutex Mutex;       /**< for thread safety */
1343    GLint RefCount;              /**< reference count */
1344    GLuint Name;                 /**< the user-visible texture object ID */
1345    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1346
1347    struct gl_sampler_object Sampler;
1348
1349    GLfloat Priority;            /**< in [0,1] */
1350    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1351    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1352    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1353    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1354    GLint CropRect[4];           /**< GL_OES_draw_texture */
1355    GLenum Swizzle[4];           /**< GL_EXT_texture_swizzle */
1356    GLuint _Swizzle;             /**< same as Swizzle, but SWIZZLE_* format */
1357    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1358    GLboolean _Complete;         /**< Is texture object complete? */
1359    GLboolean _RenderToTexture;  /**< Any rendering to this texture? */
1360    GLboolean Purgeable;         /**< Is the buffer purgeable under memory pressure? */
1361    GLboolean Immutable;         /**< GL_ARB_texture_storage */
1362
1363    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1364    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1365
1366    /** GL_ARB_texture_buffer_object */
1367    struct gl_buffer_object *BufferObject;
1368    GLenum BufferObjectFormat;
1369
1370    /** GL_OES_EGL_image_external */
1371    GLint RequiredTextureImageUnits;
1372 };
1373
1374
1375 /** Up to four combiner sources are possible with GL_NV_texture_env_combine4 */
1376 #define MAX_COMBINER_TERMS 4
1377
1378
1379 /**
1380  * Texture combine environment state.
1381  */
1382 struct gl_tex_env_combine_state
1383 {
1384    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1385    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1386    /** Source terms: GL_PRIMARY_COLOR, GL_TEXTURE, etc */
1387    GLenum SourceRGB[MAX_COMBINER_TERMS];
1388    GLenum SourceA[MAX_COMBINER_TERMS];
1389    /** Source operands: GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR, etc */
1390    GLenum OperandRGB[MAX_COMBINER_TERMS];
1391    GLenum OperandA[MAX_COMBINER_TERMS];
1392    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1393    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1394    GLuint _NumArgsRGB;   /**< Number of inputs used for the RGB combiner */
1395    GLuint _NumArgsA;     /**< Number of inputs used for the A combiner */
1396 };
1397
1398
1399 /**
1400  * Texture coord generation state.
1401  */
1402 struct gl_texgen
1403 {
1404    GLenum Mode;         /**< GL_EYE_LINEAR, GL_SPHERE_MAP, etc */
1405    GLbitfield _ModeBit; /**< TEXGEN_x bit corresponding to Mode */
1406    GLfloat ObjectPlane[4];
1407    GLfloat EyePlane[4];
1408 };
1409
1410
1411 /**
1412  * Texture unit state.  Contains enable flags, texture environment/function/
1413  * combiners, texgen state, and pointers to current texture objects.
1414  */
1415 struct gl_texture_unit
1416 {
1417    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1418    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1419
1420    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1421    GLclampf EnvColor[4];
1422    GLfloat EnvColorUnclamped[4];
1423
1424    struct gl_texgen GenS;
1425    struct gl_texgen GenT;
1426    struct gl_texgen GenR;
1427    struct gl_texgen GenQ;
1428    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1429    GLbitfield _GenFlags;        /**< Bitwise-OR of Gen[STRQ]._ModeBit */
1430
1431    GLfloat LodBias;             /**< for biasing mipmap levels */
1432    GLenum BumpTarget;
1433    GLfloat RotMatrix[4]; /* 2x2 matrix */
1434
1435    /** Current sampler object (GL_ARB_sampler_objects) */
1436    struct gl_sampler_object *Sampler;
1437
1438    /**
1439     * \name GL_EXT_texture_env_combine
1440     */
1441    struct gl_tex_env_combine_state Combine;
1442
1443    /**
1444     * Derived state based on \c EnvMode and the \c BaseFormat of the
1445     * currently enabled texture.
1446     */
1447    struct gl_tex_env_combine_state _EnvMode;
1448
1449    /**
1450     * Currently enabled combiner state.  This will point to either
1451     * \c Combine or \c _EnvMode.
1452     */
1453    struct gl_tex_env_combine_state *_CurrentCombine;
1454
1455    /** Current texture object pointers */
1456    struct gl_texture_object *CurrentTex[NUM_TEXTURE_TARGETS];
1457
1458    /** Points to highest priority, complete and enabled texture object */
1459    struct gl_texture_object *_Current;
1460 };
1461
1462
1463 /**
1464  * Texture attribute group (GL_TEXTURE_BIT).
1465  */
1466 struct gl_texture_attrib
1467 {
1468    GLuint CurrentUnit;   /**< GL_ACTIVE_TEXTURE */
1469    struct gl_texture_unit Unit[MAX_COMBINED_TEXTURE_IMAGE_UNITS];
1470
1471    struct gl_texture_object *ProxyTex[NUM_TEXTURE_TARGETS];
1472
1473    /** GL_ARB_texture_buffer_object */
1474    struct gl_buffer_object *BufferObject;
1475
1476    /** GL_ARB_seamless_cubemap */
1477    GLboolean CubeMapSeamless;
1478
1479    /** Texture units/samplers used by vertex or fragment texturing */
1480    GLbitfield _EnabledUnits;
1481
1482    /** Texture coord units/sets used for fragment texturing */
1483    GLbitfield _EnabledCoordUnits;
1484
1485    /** Texture coord units that have texgen enabled */
1486    GLbitfield _TexGenEnabled;
1487
1488    /** Texture coord units that have non-identity matrices */
1489    GLbitfield _TexMatEnabled;
1490
1491    /** Bitwise-OR of all Texture.Unit[i]._GenFlags */
1492    GLbitfield _GenFlags;
1493 };
1494
1495
1496 /**
1497  * Data structure representing a single clip plane (e.g. one of the elements
1498  * of the ctx->Transform.EyeUserPlane or ctx->Transform._ClipUserPlane array).
1499  */
1500 typedef GLfloat gl_clip_plane[4];
1501
1502
1503 /**
1504  * Transformation attribute group (GL_TRANSFORM_BIT).
1505  */
1506 struct gl_transform_attrib
1507 {
1508    GLenum MatrixMode;                           /**< Matrix mode */
1509    gl_clip_plane EyeUserPlane[MAX_CLIP_PLANES]; /**< User clip planes */
1510    gl_clip_plane _ClipUserPlane[MAX_CLIP_PLANES]; /**< derived */
1511    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1512    GLboolean Normalize;                         /**< Normalize all normals? */
1513    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1514    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1515    GLboolean DepthClamp;                        /**< GL_ARB_depth_clamp */
1516
1517    GLfloat CullEyePos[4];
1518    GLfloat CullObjPos[4];
1519 };
1520
1521
1522 /**
1523  * Viewport attribute group (GL_VIEWPORT_BIT).
1524  */
1525 struct gl_viewport_attrib
1526 {
1527    GLint X, Y;                  /**< position */
1528    GLsizei Width, Height;       /**< size */
1529    GLfloat Near, Far;           /**< Depth buffer range */
1530    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1531 };
1532
1533
1534 /**
1535  * GL_ARB_vertex/pixel_buffer_object buffer object
1536  */
1537 struct gl_buffer_object
1538 {
1539    _glthread_Mutex Mutex;
1540    GLint RefCount;
1541    GLuint Name;
1542    GLenum Usage;        /**< GL_STREAM_DRAW_ARB, GL_STREAM_READ_ARB, etc. */
1543    GLsizeiptrARB Size;  /**< Size of buffer storage in bytes */
1544    GLubyte *Data;       /**< Location of storage either in RAM or VRAM. */
1545    /** Fields describing a mapped buffer */
1546    /*@{*/
1547    GLbitfield AccessFlags; /**< Mask of GL_MAP_x_BIT flags */
1548    GLvoid *Pointer;     /**< User-space address of mapping */
1549    GLintptr Offset;     /**< Mapped offset */
1550    GLsizeiptr Length;   /**< Mapped length */
1551    /*@}*/
1552    GLboolean DeletePending;   /**< true if buffer object is removed from the hash */
1553    GLboolean Written;   /**< Ever written to? (for debugging) */
1554    GLboolean Purgeable; /**< Is the buffer purgeable under memory pressure? */
1555 };
1556
1557
1558 /**
1559  * Client pixel packing/unpacking attributes
1560  */
1561 struct gl_pixelstore_attrib
1562 {
1563    GLint Alignment;
1564    GLint RowLength;
1565    GLint SkipPixels;
1566    GLint SkipRows;
1567    GLint ImageHeight;
1568    GLint SkipImages;
1569    GLboolean SwapBytes;
1570    GLboolean LsbFirst;
1571    GLboolean Invert;        /**< GL_MESA_pack_invert */
1572    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1573 };
1574
1575
1576 /**
1577  * Client vertex array attributes
1578  */
1579 struct gl_client_array
1580 {
1581    GLint Size;                  /**< components per element (1,2,3,4) */
1582    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1583    GLenum Format;               /**< default: GL_RGBA, but may be GL_BGRA */
1584    GLsizei Stride;              /**< user-specified stride */
1585    GLsizei StrideB;             /**< actual stride in bytes */
1586    const GLubyte *Ptr;          /**< Points to array data */
1587    GLboolean Enabled;           /**< Enabled flag is a boolean */
1588    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1589    GLboolean Integer;           /**< Integer-valued? */
1590    GLuint InstanceDivisor;      /**< GL_ARB_instanced_arrays */
1591    GLuint _ElementSize;         /**< size of each element in bytes */
1592
1593    struct gl_buffer_object *BufferObj;/**< GL_ARB_vertex_buffer_object */
1594    GLuint _MaxElement;          /**< max element index into array buffer + 1 */
1595 };
1596
1597
1598 /**
1599  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1600  * extension, but a nice encapsulation in any case.
1601  */
1602 struct gl_array_object
1603 {
1604    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1605    GLuint Name;
1606
1607    GLint RefCount;
1608    _glthread_Mutex Mutex;
1609    GLboolean VBOonly;  /**< require all arrays to live in VBOs? */
1610
1611    /** Vertex attribute arrays */
1612    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1613
1614    /** Mask of VERT_BIT_* values indicating which arrays are enabled */
1615    GLbitfield64 _Enabled;
1616
1617    /**
1618     * Min of all enabled arrays' _MaxElement.  When arrays reside inside VBOs
1619     * we can determine the max legal (in bounds) glDrawElements array index.
1620     */
1621    GLuint _MaxElement;
1622
1623    struct gl_buffer_object *ElementArrayBufferObj;
1624 };
1625
1626
1627 /**
1628  * Vertex array state
1629  */
1630 struct gl_array_attrib
1631 {
1632    /** Currently bound array object. See _mesa_BindVertexArrayAPPLE() */
1633    struct gl_array_object *ArrayObj;
1634
1635    /** The default vertex array object */
1636    struct gl_array_object *DefaultArrayObj;
1637
1638    /** Array objects (GL_ARB/APPLE_vertex_array_object) */
1639    struct _mesa_HashTable *Objects;
1640
1641    GLint ActiveTexture;         /**< Client Active Texture */
1642    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1643    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1644
1645    /** GL 3.1 (slightly different from GL_NV_primitive_restart) */
1646    GLboolean PrimitiveRestart;
1647    GLuint RestartIndex;
1648
1649    GLbitfield64 NewState;               /**< mask of VERT_BIT_* values */
1650    GLboolean RebindArrays; /**< whether the VBO module should rebind arrays */
1651
1652    /* GL_ARB_vertex_buffer_object */
1653    struct gl_buffer_object *ArrayBufferObj;
1654 };
1655
1656
1657 /**
1658  * Feedback buffer state
1659  */
1660 struct gl_feedback
1661 {
1662    GLenum Type;
1663    GLbitfield _Mask;    /**< FB_* bits */
1664    GLfloat *Buffer;
1665    GLuint BufferSize;
1666    GLuint Count;
1667 };
1668
1669
1670 /**
1671  * Selection buffer state
1672  */
1673 struct gl_selection
1674 {
1675    GLuint *Buffer;      /**< selection buffer */
1676    GLuint BufferSize;   /**< size of the selection buffer */
1677    GLuint BufferCount;  /**< number of values in the selection buffer */
1678    GLuint Hits;         /**< number of records in the selection buffer */
1679    GLuint NameStackDepth; /**< name stack depth */
1680    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1681    GLboolean HitFlag;   /**< hit flag */
1682    GLfloat HitMinZ;     /**< minimum hit depth */
1683    GLfloat HitMaxZ;     /**< maximum hit depth */
1684 };
1685
1686
1687 /**
1688  * 1-D Evaluator control points
1689  */
1690 struct gl_1d_map
1691 {
1692    GLuint Order;        /**< Number of control points */
1693    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1694    GLfloat *Points;     /**< Points to contiguous control points */
1695 };
1696
1697
1698 /**
1699  * 2-D Evaluator control points
1700  */
1701 struct gl_2d_map
1702 {
1703    GLuint Uorder;               /**< Number of control points in U dimension */
1704    GLuint Vorder;               /**< Number of control points in V dimension */
1705    GLfloat u1, u2, du;
1706    GLfloat v1, v2, dv;
1707    GLfloat *Points;             /**< Points to contiguous control points */
1708 };
1709
1710
1711 /**
1712  * All evaluator control point state
1713  */
1714 struct gl_evaluators
1715 {
1716    /**
1717     * \name 1-D maps
1718     */
1719    /*@{*/
1720    struct gl_1d_map Map1Vertex3;
1721    struct gl_1d_map Map1Vertex4;
1722    struct gl_1d_map Map1Index;
1723    struct gl_1d_map Map1Color4;
1724    struct gl_1d_map Map1Normal;
1725    struct gl_1d_map Map1Texture1;
1726    struct gl_1d_map Map1Texture2;
1727    struct gl_1d_map Map1Texture3;
1728    struct gl_1d_map Map1Texture4;
1729    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1730    /*@}*/
1731
1732    /**
1733     * \name 2-D maps
1734     */
1735    /*@{*/
1736    struct gl_2d_map Map2Vertex3;
1737    struct gl_2d_map Map2Vertex4;
1738    struct gl_2d_map Map2Index;
1739    struct gl_2d_map Map2Color4;
1740    struct gl_2d_map Map2Normal;
1741    struct gl_2d_map Map2Texture1;
1742    struct gl_2d_map Map2Texture2;
1743    struct gl_2d_map Map2Texture3;
1744    struct gl_2d_map Map2Texture4;
1745    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1746    /*@}*/
1747 };
1748
1749
1750 /**
1751  * Names of the various vertex/fragment program register files, etc.
1752  *
1753  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1754  * All values should fit in a 4-bit field.
1755  *
1756  * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
1757  * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
1758  * be "uniform" variables since they can only be set outside glBegin/End.
1759  * They're also all stored in the same Parameters array.
1760  */
1761 typedef enum
1762 {
1763    PROGRAM_TEMPORARY,   /**< machine->Temporary[] */
1764    PROGRAM_INPUT,       /**< machine->Inputs[] */
1765    PROGRAM_OUTPUT,      /**< machine->Outputs[] */
1766    PROGRAM_VARYING,     /**< machine->Inputs[]/Outputs[] */
1767    PROGRAM_LOCAL_PARAM, /**< gl_program->LocalParams[] */
1768    PROGRAM_ENV_PARAM,   /**< gl_program->Parameters[] */
1769    PROGRAM_STATE_VAR,   /**< gl_program->Parameters[] */
1770    PROGRAM_NAMED_PARAM, /**< gl_program->Parameters[] */
1771    PROGRAM_CONSTANT,    /**< gl_program->Parameters[] */
1772    PROGRAM_UNIFORM,     /**< gl_program->Parameters[] */
1773    PROGRAM_WRITE_ONLY,  /**< A dummy, write-only register */
1774    PROGRAM_ADDRESS,     /**< machine->AddressReg */
1775    PROGRAM_SAMPLER,     /**< for shader samplers, compile-time only */
1776    PROGRAM_SYSTEM_VALUE,/**< InstanceId, PrimitiveID, etc. */
1777    PROGRAM_UNDEFINED,   /**< Invalid/TBD value */
1778    PROGRAM_FILE_MAX
1779 } gl_register_file;
1780
1781
1782 /**
1783  * If the register file is PROGRAM_SYSTEM_VALUE, the register index will be
1784  * one of these values.
1785  */
1786 typedef enum
1787 {
1788    SYSTEM_VALUE_FRONT_FACE,  /**< Fragment shader only (not done yet) */
1789    SYSTEM_VALUE_VERTEX_ID,   /**< Vertex shader only */
1790    SYSTEM_VALUE_INSTANCE_ID, /**< Vertex shader only */
1791    SYSTEM_VALUE_MAX          /**< Number of values */
1792 } gl_system_value;
1793
1794
1795 /**
1796  * The possible interpolation qualifiers that can be applied to a fragment
1797  * shader input in GLSL.
1798  *
1799  * Note: INTERP_QUALIFIER_NONE must be 0 so that memsetting the
1800  * gl_fragment_program data structure to 0 causes the default behavior.
1801  */
1802 enum glsl_interp_qualifier
1803 {
1804    INTERP_QUALIFIER_NONE = 0,
1805    INTERP_QUALIFIER_SMOOTH,
1806    INTERP_QUALIFIER_FLAT,
1807    INTERP_QUALIFIER_NOPERSPECTIVE
1808 };
1809
1810
1811 /** Vertex and fragment instructions */
1812 struct prog_instruction;
1813 struct gl_program_parameter_list;
1814 struct gl_uniform_list;
1815
1816 /** Post-link transform feedback info. */
1817 struct gl_transform_feedback_info {
1818    unsigned NumOutputs;
1819
1820    struct {
1821       unsigned OutputRegister;
1822       unsigned OutputBuffer;
1823       unsigned NumComponents;
1824    } Outputs[MAX_PROGRAM_OUTPUTS];
1825 };
1826
1827 /**
1828  * Base class for any kind of program object
1829  */
1830 struct gl_program
1831 {
1832    GLuint Id;
1833    GLubyte *String;  /**< Null-terminated program text */
1834    GLint RefCount;
1835    GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
1836    GLenum Format;    /**< String encoding format */
1837    GLboolean Resident;
1838
1839    struct prog_instruction *Instructions;
1840
1841    GLbitfield64 InputsRead;     /**< Bitmask of which input regs are read */
1842    GLbitfield64 OutputsWritten; /**< Bitmask of which output regs are written */
1843    GLbitfield SystemValuesRead;   /**< Bitmask of SYSTEM_VALUE_x inputs used */
1844    GLbitfield InputFlags[MAX_PROGRAM_INPUTS];   /**< PROG_PARAM_BIT_x flags */
1845    GLbitfield OutputFlags[MAX_PROGRAM_OUTPUTS]; /**< PROG_PARAM_BIT_x flags */
1846    GLbitfield TexturesUsed[MAX_COMBINED_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1847    GLbitfield SamplersUsed;   /**< Bitfield of which samplers are used */
1848    GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */
1849
1850
1851    /** Named parameters, constants, etc. from program text */
1852    struct gl_program_parameter_list *Parameters;
1853    /** Numbered local parameters */
1854    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1855
1856    /** Map from sampler unit to texture unit (set by glUniform1i()) */
1857    GLubyte SamplerUnits[MAX_SAMPLERS];
1858    /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
1859    gl_texture_index SamplerTargets[MAX_SAMPLERS];
1860
1861    /** Bitmask of which register files are read/written with indirect
1862     * addressing.  Mask of (1 << PROGRAM_x) bits.
1863     */
1864    GLbitfield IndirectRegisterFiles;
1865
1866    /** Logical counts */
1867    /*@{*/
1868    GLuint NumInstructions;
1869    GLuint NumTemporaries;
1870    GLuint NumParameters;
1871    GLuint NumAttributes;
1872    GLuint NumAddressRegs;
1873    GLuint NumAluInstructions;
1874    GLuint NumTexInstructions;
1875    GLuint NumTexIndirections;
1876    /*@}*/
1877    /** Native, actual h/w counts */
1878    /*@{*/
1879    GLuint NumNativeInstructions;
1880    GLuint NumNativeTemporaries;
1881    GLuint NumNativeParameters;
1882    GLuint NumNativeAttributes;
1883    GLuint NumNativeAddressRegs;
1884    GLuint NumNativeAluInstructions;
1885    GLuint NumNativeTexInstructions;
1886    GLuint NumNativeTexIndirections;
1887    /*@}*/
1888 };
1889
1890
1891 /** Vertex program object */
1892 struct gl_vertex_program
1893 {
1894    struct gl_program Base;   /**< base class */
1895    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1896    GLboolean IsPositionInvariant;
1897    GLboolean UsesClipDistance;
1898 };
1899
1900
1901 /** Geometry program object */
1902 struct gl_geometry_program
1903 {
1904    struct gl_program Base;   /**< base class */
1905
1906    GLint VerticesOut;
1907    GLenum InputType;  /**< GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_ARB,
1908                            GL_TRIANGLES, or GL_TRIANGLES_ADJACENCY_ARB */
1909    GLenum OutputType; /**< GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP */
1910 };
1911
1912
1913 /** Fragment program object */
1914 struct gl_fragment_program
1915 {
1916    struct gl_program Base;   /**< base class */
1917    GLboolean UsesKill;          /**< shader uses KIL instruction */
1918    GLboolean OriginUpperLeft;
1919    GLboolean PixelCenterInteger;
1920    enum gl_frag_depth_layout FragDepthLayout;
1921
1922    /**
1923     * GLSL interpolation qualifier associated with each fragment shader input.
1924     * For inputs that do not have an interpolation qualifier specified in
1925     * GLSL, the value is INTERP_QUALIFIER_NONE.
1926     */
1927    enum glsl_interp_qualifier InterpQualifier[FRAG_ATTRIB_MAX];
1928 };
1929
1930
1931 /**
1932  * State common to vertex and fragment programs.
1933  */
1934 struct gl_program_state
1935 {
1936    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1937    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1938 };
1939
1940
1941 /**
1942  * Context state for vertex programs.
1943  */
1944 struct gl_vertex_program_state
1945 {
1946    GLboolean Enabled;            /**< User-set GL_VERTEX_PROGRAM_ARB/NV flag */
1947    GLboolean _Enabled;           /**< Enabled and _valid_ user program? */
1948    GLboolean PointSizeEnabled;   /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1949    GLboolean TwoSideEnabled;     /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1950    /** Computed two sided lighting for fixed function/programs. */
1951    GLboolean _TwoSideEnabled;
1952    struct gl_vertex_program *Current;  /**< User-bound vertex program */
1953
1954    /** Currently enabled and valid vertex program (including internal
1955     * programs, user-defined vertex programs and GLSL vertex shaders).
1956     * This is the program we must use when rendering.
1957     */
1958    struct gl_vertex_program *_Current;
1959
1960    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1961
1962    /* For GL_NV_vertex_program only: */
1963    GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
1964    GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];
1965
1966    /** Should fixed-function T&L be implemented with a vertex prog? */
1967    GLboolean _MaintainTnlProgram;
1968
1969    /** Program to emulate fixed-function T&L (see above) */
1970    struct gl_vertex_program *_TnlProgram;
1971
1972    /** Cache of fixed-function programs */
1973    struct gl_program_cache *Cache;
1974
1975    GLboolean _Overriden;
1976 };
1977
1978
1979 /**
1980  * Context state for geometry programs.
1981  */
1982 struct gl_geometry_program_state
1983 {
1984    GLboolean Enabled;               /**< GL_ARB_GEOMETRY_SHADER4 */
1985    GLboolean _Enabled;              /**< Enabled and valid program? */
1986    struct gl_geometry_program *Current;  /**< user-bound geometry program */
1987
1988    /** Currently enabled and valid program (including internal programs
1989     * and compiled shader programs).
1990     */
1991    struct gl_geometry_program *_Current;
1992
1993    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1994
1995    /** Cache of fixed-function programs */
1996    struct gl_program_cache *Cache;
1997 };
1998
1999 /**
2000  * Context state for fragment programs.
2001  */
2002 struct gl_fragment_program_state
2003 {
2004    GLboolean Enabled;     /**< User-set fragment program enable flag */
2005    GLboolean _Enabled;    /**< Enabled and _valid_ user program? */
2006    struct gl_fragment_program *Current;  /**< User-bound fragment program */
2007
2008    /** Currently enabled and valid fragment program (including internal
2009     * programs, user-defined fragment programs and GLSL fragment shaders).
2010     * This is the program we must use when rendering.
2011     */
2012    struct gl_fragment_program *_Current;
2013
2014    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
2015
2016    /** Should fixed-function texturing be implemented with a fragment prog? */
2017    GLboolean _MaintainTexEnvProgram;
2018
2019    /** Program to emulate fixed-function texture env/combine (see above) */
2020    struct gl_fragment_program *_TexEnvProgram;
2021
2022    /** Cache of fixed-function programs */
2023    struct gl_program_cache *Cache;
2024 };
2025
2026
2027 /**
2028  * ATI_fragment_shader runtime state
2029  */
2030 #define ATI_FS_INPUT_PRIMARY 0
2031 #define ATI_FS_INPUT_SECONDARY 1
2032
2033 struct atifs_instruction;
2034 struct atifs_setupinst;
2035
2036 /**
2037  * ATI fragment shader
2038  */
2039 struct ati_fragment_shader
2040 {
2041    GLuint Id;
2042    GLint RefCount;
2043    struct atifs_instruction *Instructions[2];
2044    struct atifs_setupinst *SetupInst[2];
2045    GLfloat Constants[8][4];
2046    GLbitfield LocalConstDef;  /**< Indicates which constants have been set */
2047    GLubyte numArithInstr[2];
2048    GLubyte regsAssigned[2];
2049    GLubyte NumPasses;         /**< 1 or 2 */
2050    GLubyte cur_pass;
2051    GLubyte last_optype;
2052    GLboolean interpinp1;
2053    GLboolean isValid;
2054    GLuint swizzlerq;
2055 };
2056
2057 /**
2058  * Context state for GL_ATI_fragment_shader
2059  */
2060 struct gl_ati_fragment_shader_state
2061 {
2062    GLboolean Enabled;
2063    GLboolean _Enabled;                  /**< enabled and valid shader? */
2064    GLboolean Compiling;
2065    GLfloat GlobalConstants[8][4];
2066    struct ati_fragment_shader *Current;
2067 };
2068
2069
2070 /**
2071  * Occlusion/timer query object.
2072  */
2073 struct gl_query_object
2074 {
2075    GLenum Target;      /**< The query target, when active */
2076    GLuint Id;          /**< hash table ID/name */
2077    GLuint64EXT Result; /**< the counter */
2078    GLboolean Active;   /**< inside Begin/EndQuery */
2079    GLboolean Ready;    /**< result is ready? */
2080 };
2081
2082
2083 /**
2084  * Context state for query objects.
2085  */
2086 struct gl_query_state
2087 {
2088    struct _mesa_HashTable *QueryObjects;
2089    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2090    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2091
2092    /** GL_NV_conditional_render */
2093    struct gl_query_object *CondRenderQuery;
2094
2095    /** GL_EXT_transform_feedback */
2096    struct gl_query_object *PrimitivesGenerated;
2097    struct gl_query_object *PrimitivesWritten;
2098
2099    /** GL_ARB_timer_query */
2100    struct gl_query_object *TimeElapsed;
2101
2102    GLenum CondRenderMode;
2103 };
2104
2105
2106 /** Sync object state */
2107 struct gl_sync_object {
2108    struct simple_node link;
2109    GLenum Type;               /**< GL_SYNC_FENCE */
2110    GLuint Name;               /**< Fence name */
2111    GLint RefCount;            /**< Reference count */
2112    GLboolean DeletePending;   /**< Object was deleted while there were still
2113                                * live references (e.g., sync not yet finished)
2114                                */
2115    GLenum SyncCondition;
2116    GLbitfield Flags;          /**< Flags passed to glFenceSync */
2117    GLuint StatusFlag:1;       /**< Has the sync object been signaled? */
2118 };
2119
2120
2121 /** Set by #pragma directives */
2122 struct gl_sl_pragmas
2123 {
2124    GLboolean IgnoreOptimize;  /**< ignore #pragma optimize(on/off) ? */
2125    GLboolean IgnoreDebug;     /**< ignore #pragma debug(on/off) ? */
2126    GLboolean Optimize;  /**< defaults on */
2127    GLboolean Debug;     /**< defaults off */
2128 };
2129
2130
2131 /**
2132  * A GLSL vertex or fragment shader object.
2133  */
2134 struct gl_shader
2135 {
2136    GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER || GL_GEOMETRY_SHADER_ARB (first field!) */
2137    GLuint Name;  /**< AKA the handle */
2138    GLint RefCount;  /**< Reference count */
2139    GLboolean DeletePending;
2140    GLboolean CompileStatus;
2141    const GLchar *Source;  /**< Source code string */
2142    GLuint SourceChecksum;       /**< for debug/logging purposes */
2143    struct gl_program *Program;  /**< Post-compile assembly code */
2144    GLchar *InfoLog;
2145    struct gl_sl_pragmas Pragmas;
2146
2147    unsigned Version;       /**< GLSL version used for linking */
2148
2149    unsigned num_samplers;       /**< Number of samplers used by this shader.
2150                                  * This field is only set post-linking.
2151                                  */
2152    /**
2153     * Number of uniform components used by this shader.
2154     *
2155     * This field is only set post-linking.
2156     */
2157    unsigned num_uniform_components;
2158
2159    struct exec_list *ir;
2160    struct glsl_symbol_table *symbols;
2161
2162    /** Shaders containing built-in functions that are used for linking. */
2163    struct gl_shader *builtins_to_link[16];
2164    unsigned num_builtins_to_link;
2165 };
2166
2167
2168 /**
2169  * A GLSL program object.
2170  * Basically a linked collection of vertex and fragment shaders.
2171  */
2172 struct gl_shader_program
2173 {
2174    GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
2175    GLuint Name;  /**< aka handle or ID */
2176    GLint RefCount;  /**< Reference count */
2177    GLboolean DeletePending;
2178
2179    /**
2180     * Flags that the linker should not reject the program if it lacks
2181     * a vertex or fragment shader.  GLES2 doesn't allow separate
2182     * shader objects, and would reject them.  However, we internally
2183     * build separate shader objects for fixed function programs, which
2184     * we use for drivers/common/meta.c and for handling
2185     * _mesa_update_state with no program bound (for example in
2186     * glClear()).
2187     */
2188    GLboolean InternalSeparateShader;
2189
2190    GLuint NumShaders;          /**< number of attached shaders */
2191    struct gl_shader **Shaders; /**< List of attached the shaders */
2192
2193    /**
2194     * User-defined attribute bindings
2195     *
2196     * These are set via \c glBindAttribLocation and are used to direct the
2197     * GLSL linker.  These are \b not the values used in the compiled shader,
2198     * and they are \b not the values returned by \c glGetAttribLocation.
2199     */
2200    struct string_to_uint_map *AttributeBindings;
2201
2202    /**
2203     * User-defined fragment data bindings
2204     *
2205     * These are set via \c glBindFragDataLocation and are used to direct the
2206     * GLSL linker.  These are \b not the values used in the compiled shader,
2207     * and they are \b not the values returned by \c glGetFragDataLocation.
2208     */
2209    struct string_to_uint_map *FragDataBindings;
2210
2211    /** Transform feedback varyings */
2212    struct {
2213       GLenum BufferMode;
2214       GLuint NumVarying;
2215       GLchar **VaryingNames;  /**< Array [NumVarying] of char * */
2216    } TransformFeedback;
2217
2218    /** Post-link transform feedback info. */
2219    struct gl_transform_feedback_info LinkedTransformFeedback;
2220
2221    /** Post-link gl_FragDepth layout for ARB_conservative_depth. */
2222    enum gl_frag_depth_layout FragDepthLayout;
2223
2224    /** Geometry shader state - copied into gl_geometry_program at link time */
2225    struct {
2226       GLint VerticesOut;
2227       GLenum InputType;  /**< GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_ARB,
2228                               GL_TRIANGLES, or GL_TRIANGLES_ADJACENCY_ARB */
2229       GLenum OutputType; /**< GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP */
2230    } Geom;
2231
2232    /** Vertex shader state - copied into gl_vertex_program at link time */
2233    struct {
2234       GLboolean UsesClipDistance; /**< True if gl_ClipDistance is written to. */
2235    } Vert;
2236
2237    /* post-link info: */
2238    unsigned NumUserUniformStorage;
2239    struct gl_uniform_storage *UniformStorage;
2240
2241    /**
2242     * Map of active uniform names to locations
2243     *
2244     * Maps any active uniform that is not an array element to a location.
2245     * Each active uniform, including individual structure members will appear
2246     * in this map.  This roughly corresponds to the set of names that would be
2247     * enumerated by \c glGetActiveUniform.
2248     */
2249    struct string_to_uint_map *UniformHash;
2250
2251    /**
2252     * Map from sampler unit to texture unit (set by glUniform1i())
2253     *
2254     * A sampler unit is associated with each sampler uniform by the linker.
2255     * The sampler unit associated with each uniform is stored in the
2256     * \c gl_uniform_storage::sampler field.
2257     */
2258    GLubyte SamplerUnits[MAX_SAMPLERS];
2259    /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
2260    gl_texture_index SamplerTargets[MAX_SAMPLERS];
2261
2262    struct gl_program_parameter_list *Varying;
2263    GLboolean LinkStatus;   /**< GL_LINK_STATUS */
2264    GLboolean Validated;
2265    GLboolean _Used;        /**< Ever used for drawing? */
2266    GLchar *InfoLog;
2267
2268    unsigned Version;       /**< GLSL version used for linking */
2269
2270    /**
2271     * Per-stage shaders resulting from the first stage of linking.
2272     *
2273     * Set of linked shaders for this program.  The array is accessed using the
2274     * \c MESA_SHADER_* defines.  Entries for non-existent stages will be
2275     * \c NULL.
2276     */
2277    struct gl_shader *_LinkedShaders[MESA_SHADER_TYPES];
2278 };
2279
2280
2281 #define GLSL_DUMP      0x1  /**< Dump shaders to stdout */
2282 #define GLSL_LOG       0x2  /**< Write shaders to files */
2283 #define GLSL_OPT       0x4  /**< Force optimizations (override pragmas) */
2284 #define GLSL_NO_OPT    0x8  /**< Force no optimizations (override pragmas) */
2285 #define GLSL_UNIFORMS 0x10  /**< Print glUniform calls */
2286 #define GLSL_NOP_VERT 0x20  /**< Force no-op vertex shaders */
2287 #define GLSL_NOP_FRAG 0x40  /**< Force no-op fragment shaders */
2288 #define GLSL_USE_PROG 0x80  /**< Log glUseProgram calls */
2289
2290
2291 /**
2292  * Context state for GLSL vertex/fragment shaders.
2293  */
2294 struct gl_shader_state
2295 {
2296    /**
2297     * Programs used for rendering
2298     *
2299     * There is a separate program set for each shader stage.  If
2300     * GL_EXT_separate_shader_objects is not supported, each of these must point
2301     * to \c NULL or to the same program.
2302     */
2303    struct gl_shader_program *CurrentVertexProgram;
2304    struct gl_shader_program *CurrentGeometryProgram;
2305    struct gl_shader_program *CurrentFragmentProgram;
2306
2307    /**
2308     * Program used by glUniform calls.
2309     *
2310     * Explicitly set by \c glUseProgram and \c glActiveProgramEXT.
2311     */
2312    struct gl_shader_program *ActiveProgram;
2313
2314    GLbitfield Flags;                    /**< Mask of GLSL_x flags */
2315 };
2316
2317 /**
2318  * Compiler options for a single GLSL shaders type
2319  */
2320 struct gl_shader_compiler_options
2321 {
2322    /** Driver-selectable options: */
2323    GLboolean EmitCondCodes;             /**< Use condition codes? */
2324    GLboolean EmitNVTempInitialization;  /**< 0-fill NV temp registers */
2325    GLboolean EmitNoLoops;
2326    GLboolean EmitNoFunctions;
2327    GLboolean EmitNoCont;                  /**< Emit CONT opcode? */
2328    GLboolean EmitNoMainReturn;            /**< Emit CONT/RET opcodes? */
2329    GLboolean EmitNoNoise;                 /**< Emit NOISE opcodes? */
2330    GLboolean EmitNoPow;                   /**< Emit POW opcodes? */
2331    GLboolean LowerClipDistance; /**< Lower gl_ClipDistance from float[8] to vec4[2]? */
2332
2333    /**
2334     * \name Forms of indirect addressing the driver cannot do.
2335     */
2336    /*@{*/
2337    GLboolean EmitNoIndirectInput;   /**< No indirect addressing of inputs */
2338    GLboolean EmitNoIndirectOutput;  /**< No indirect addressing of outputs */
2339    GLboolean EmitNoIndirectTemp;    /**< No indirect addressing of temps */
2340    GLboolean EmitNoIndirectUniform; /**< No indirect addressing of constants */
2341    /*@}*/
2342
2343    GLuint MaxIfDepth;               /**< Maximum nested IF blocks */
2344    GLuint MaxUnrollIterations;
2345
2346    struct gl_sl_pragmas DefaultPragmas; /**< Default #pragma settings */
2347 };
2348
2349 /**
2350  * Transform feedback object state
2351  */
2352 struct gl_transform_feedback_object
2353 {
2354    GLuint Name;  /**< AKA the object ID */
2355    GLint RefCount;
2356    GLboolean Active;  /**< Is transform feedback enabled? */
2357    GLboolean Paused;  /**< Is transform feedback paused? */
2358    GLboolean EndedAnytime; /**< Has EndTransformFeedback been called
2359                                 at least once? */
2360
2361    /** The feedback buffers */
2362    GLuint BufferNames[MAX_FEEDBACK_ATTRIBS];
2363    struct gl_buffer_object *Buffers[MAX_FEEDBACK_ATTRIBS];
2364
2365    /** Start of feedback data in dest buffer */
2366    GLintptr Offset[MAX_FEEDBACK_ATTRIBS];
2367    /** Max data to put into dest buffer (in bytes) */
2368    GLsizeiptr Size[MAX_FEEDBACK_ATTRIBS];
2369 };
2370
2371
2372 /**
2373  * Context state for transform feedback.
2374  */
2375 struct gl_transform_feedback
2376 {
2377    GLenum Mode;       /**< GL_POINTS, GL_LINES or GL_TRIANGLES */
2378
2379    GLboolean RasterDiscard;  /**< GL_RASTERIZER_DISCARD */
2380
2381    /** The general binding point (GL_TRANSFORM_FEEDBACK_BUFFER) */
2382    struct gl_buffer_object *CurrentBuffer;
2383
2384    /** The table of all transform feedback objects */
2385    struct _mesa_HashTable *Objects;
2386
2387    /** The current xform-fb object (GL_TRANSFORM_FEEDBACK_BINDING) */
2388    struct gl_transform_feedback_object *CurrentObject;
2389
2390    /** The default xform-fb object (Name==0) */
2391    struct gl_transform_feedback_object *DefaultObject;
2392 };
2393
2394
2395
2396 /**
2397  * State which can be shared by multiple contexts:
2398  */
2399 struct gl_shared_state
2400 {
2401    _glthread_Mutex Mutex;                  /**< for thread safety */
2402    GLint RefCount;                         /**< Reference count */
2403    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2404    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2405
2406    /** Default texture objects (shared by all texture units) */
2407    struct gl_texture_object *DefaultTex[NUM_TEXTURE_TARGETS];
2408
2409    /** Fallback texture used when a bound texture is incomplete */
2410    struct gl_texture_object *FallbackTex;
2411
2412    /**
2413     * \name Thread safety and statechange notification for texture
2414     * objects.
2415     *
2416     * \todo Improve the granularity of locking.
2417     */
2418    /*@{*/
2419    _glthread_Mutex TexMutex;            /**< texobj thread safety */
2420    GLuint TextureStateStamp;            /**< state notification for shared tex */
2421    /*@}*/
2422
2423    /** Default buffer object for vertex arrays that aren't in VBOs */
2424    struct gl_buffer_object *NullBufferObj;
2425
2426    /**
2427     * \name Vertex/geometry/fragment programs
2428     */
2429    /*@{*/
2430    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2431    struct gl_vertex_program *DefaultVertexProgram;
2432    struct gl_fragment_program *DefaultFragmentProgram;
2433    struct gl_geometry_program *DefaultGeometryProgram;
2434    /*@}*/
2435
2436    /* GL_ATI_fragment_shader */
2437    struct _mesa_HashTable *ATIShaders;
2438    struct ati_fragment_shader *DefaultFragmentShader;
2439
2440    struct _mesa_HashTable *BufferObjects;
2441
2442    /** Table of both gl_shader and gl_shader_program objects */
2443    struct _mesa_HashTable *ShaderObjects;
2444
2445    /* GL_EXT_framebuffer_object */
2446    struct _mesa_HashTable *RenderBuffers;
2447    struct _mesa_HashTable *FrameBuffers;
2448
2449    /* GL_ARB_sync */
2450    struct simple_node SyncObjects;
2451
2452    /** GL_ARB_sampler_objects */
2453    struct _mesa_HashTable *SamplerObjects;
2454
2455    void *DriverData;  /**< Device driver shared state */
2456 };
2457
2458
2459
2460
2461 /**
2462  * A renderbuffer stores colors or depth values or stencil values.
2463  * A framebuffer object will have a collection of these.
2464  * Data are read/written to the buffer with a handful of Get/Put functions.
2465  *
2466  * Instances of this object are allocated with the Driver's NewRenderbuffer
2467  * hook.  Drivers will likely wrap this class inside a driver-specific
2468  * class to simulate inheritance.
2469  */
2470 struct gl_renderbuffer
2471 {
2472    _glthread_Mutex Mutex;                  /**< for thread safety */
2473    GLuint ClassID;        /**< Useful for drivers */
2474    GLuint Name;
2475    GLint RefCount;
2476    GLuint Width, Height;
2477    GLint RowStride;       /**< Padded width in units of pixels */
2478    GLboolean Purgeable;   /**< Is the buffer purgeable under memory pressure? */
2479
2480    GLboolean AttachedAnytime; /**< TRUE if it was attached to a framebuffer */
2481
2482    GLubyte NumSamples;
2483
2484    GLenum InternalFormat; /**< The user-specified format */
2485    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2486                                GL_STENCIL_INDEX. */
2487    gl_format Format;      /**< The actual renderbuffer memory format */
2488
2489    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2490    GLvoid *Data;        /**< This may not be used by some kinds of RBs */
2491
2492    /* Used to wrap one renderbuffer around another: */
2493    struct gl_renderbuffer *Wrapped;
2494
2495    /* Delete this renderbuffer */
2496    void (*Delete)(struct gl_renderbuffer *rb);
2497
2498    /* Allocate new storage for this renderbuffer */
2499    GLboolean (*AllocStorage)(struct gl_context *ctx, struct gl_renderbuffer *rb,
2500                              GLenum internalFormat,
2501                              GLuint width, GLuint height);
2502
2503    /* Lock/Unlock are called before/after calling the Get/Put functions.
2504     * Not sure this is the right place for these yet.
2505    void (*Lock)(struct gl_context *ctx, struct gl_renderbuffer *rb);
2506    void (*Unlock)(struct gl_context *ctx, struct gl_renderbuffer *rb);
2507     */
2508
2509    /* Return a pointer to the element/pixel at (x,y).
2510     * Should return NULL if the buffer memory can't be directly addressed.
2511     */
2512    void *(*GetPointer)(struct gl_context *ctx, struct gl_renderbuffer *rb,
2513                        GLint x, GLint y);
2514
2515    /* Get/Read a row of values.
2516     * The values will be of format _BaseFormat and type DataType.
2517     */
2518    void (*GetRow)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2519                   GLint x, GLint y, void *values);
2520
2521    /* Get/Read values at arbitrary locations.
2522     * The values will be of format _BaseFormat and type DataType.
2523     */
2524    void (*GetValues)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2525                      const GLint x[], const GLint y[], void *values);
2526
2527    /* Put/Write a row of values.
2528     * The values will be of format _BaseFormat and type DataType.
2529     */
2530    void (*PutRow)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2531                   GLint x, GLint y, const void *values, const GLubyte *mask);
2532
2533    /* Put/Write a row of RGB values.  This is a special-case routine that's
2534     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2535     * a common case for glDrawPixels and some triangle routines.
2536     * The values will be of format GL_RGB and type DataType.
2537     */
2538    void (*PutRowRGB)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2539                     GLint x, GLint y, const void *values, const GLubyte *mask);
2540
2541
2542    /* Put/Write a row of identical values.
2543     * The values will be of format _BaseFormat and type DataType.
2544     */
2545    void (*PutMonoRow)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2546                      GLint x, GLint y, const void *value, const GLubyte *mask);
2547
2548    /* Put/Write values at arbitrary locations.
2549     * The values will be of format _BaseFormat and type DataType.
2550     */
2551    void (*PutValues)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2552                      const GLint x[], const GLint y[], const void *values,
2553                      const GLubyte *mask);
2554    /* Put/Write identical values at arbitrary locations.
2555     * The values will be of format _BaseFormat and type DataType.
2556     */
2557    void (*PutMonoValues)(struct gl_context *ctx, struct gl_renderbuffer *rb,
2558                          GLuint count, const GLint x[], const GLint y[],
2559                          const void *value, const GLubyte *mask);
2560 };
2561
2562
2563 /**
2564  * A renderbuffer attachment points to either a texture object (and specifies
2565  * a mipmap level, cube face or 3D texture slice) or points to a renderbuffer.
2566  */
2567 struct gl_renderbuffer_attachment
2568 {
2569    GLenum Type;  /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
2570    GLboolean Complete;
2571
2572    /**
2573     * If \c Type is \c GL_RENDERBUFFER_EXT, this stores a pointer to the
2574     * application supplied renderbuffer object.
2575     */
2576    struct gl_renderbuffer *Renderbuffer;
2577
2578    /**
2579     * If \c Type is \c GL_TEXTURE, this stores a pointer to the application
2580     * supplied texture object.
2581     */
2582    struct gl_texture_object *Texture;
2583    GLuint TextureLevel; /**< Attached mipmap level. */
2584    GLuint CubeMapFace;  /**< 0 .. 5, for cube map textures. */
2585    GLuint Zoffset;      /**< Slice for 3D textures,  or layer for both 1D
2586                          * and 2D array textures */
2587 };
2588
2589
2590 /**
2591  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2592  * In C++ terms, think of this as a base class from which device drivers
2593  * will make derived classes.
2594  */
2595 struct gl_framebuffer
2596 {
2597    _glthread_Mutex Mutex;  /**< for thread safety */
2598    /**
2599     * If zero, this is a window system framebuffer.  If non-zero, this
2600     * is a FBO framebuffer; note that for some devices (i.e. those with
2601     * a natural pixel coordinate system for FBOs that differs from the
2602     * OpenGL/Mesa coordinate system), this means that the viewport,
2603     * polygon face orientation, and polygon stipple will have to be inverted.
2604     */
2605    GLuint Name;
2606
2607    GLint RefCount;
2608    GLboolean DeletePending;
2609
2610    /**
2611     * The framebuffer's visual. Immutable if this is a window system buffer.
2612     * Computed from attachments if user-made FBO.
2613     */
2614    struct gl_config Visual;
2615
2616    GLboolean Initialized;
2617
2618    GLuint Width, Height;        /**< size of frame buffer in pixels */
2619
2620    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2621    /*@{*/
2622    GLint _Xmin, _Xmax;  /**< inclusive */
2623    GLint _Ymin, _Ymax;  /**< exclusive */
2624    /*@}*/
2625
2626    /** \name  Derived Z buffer stuff */
2627    /*@{*/
2628    GLuint _DepthMax;    /**< Max depth buffer value */
2629    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2630    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2631    /*@}*/
2632
2633    /** One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2634    GLenum _Status;
2635
2636    /** Integer color values */
2637    GLboolean _IntegerColor;
2638
2639    /** Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2640    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2641
2642    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2643     * attribute group and GL_PIXEL attribute group, respectively.
2644     */
2645    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2646    GLenum ColorReadBuffer;
2647
2648    /** Computed from ColorDraw/ReadBuffer above */
2649    GLuint _NumColorDrawBuffers;
2650    GLint _ColorDrawBufferIndexes[MAX_DRAW_BUFFERS]; /**< BUFFER_x or -1 */
2651    GLint _ColorReadBufferIndex; /* -1 = None */
2652    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS];
2653    struct gl_renderbuffer *_ColorReadBuffer;
2654
2655    /** Wrappers to make combined depth/stencil buffers look like separate
2656     * buffers.  Only used by swrast.  Will be removed in the future.
2657     */
2658    struct gl_renderbuffer *_DepthBuffer;
2659    struct gl_renderbuffer *_StencilBuffer;
2660
2661    /** Delete this framebuffer */
2662    void (*Delete)(struct gl_framebuffer *fb);
2663 };
2664
2665
2666 /**
2667  * Precision info for shader datatypes.  See glGetShaderPrecisionFormat().
2668  */
2669 struct gl_precision
2670 {
2671    GLushort RangeMin;   /**< min value exponent */
2672    GLushort RangeMax;   /**< max value exponent */
2673    GLushort Precision;  /**< number of mantissa bits */
2674 };
2675
2676
2677 /**
2678  * Limits for vertex, geometry and fragment programs/shaders.
2679  */
2680 struct gl_program_constants
2681 {
2682    /* logical limits */
2683    GLuint MaxInstructions;
2684    GLuint MaxAluInstructions;
2685    GLuint MaxTexInstructions;
2686    GLuint MaxTexIndirections;
2687    GLuint MaxAttribs;
2688    GLuint MaxTemps;
2689    GLuint MaxAddressRegs;
2690    GLuint MaxAddressOffset;  /**< [-MaxAddressOffset, MaxAddressOffset-1] */
2691    GLuint MaxParameters;
2692    GLuint MaxLocalParams;
2693    GLuint MaxEnvParams;
2694    /* native/hardware limits */
2695    GLuint MaxNativeInstructions;
2696    GLuint MaxNativeAluInstructions;
2697    GLuint MaxNativeTexInstructions;
2698    GLuint MaxNativeTexIndirections;
2699    GLuint MaxNativeAttribs;
2700    GLuint MaxNativeTemps;
2701    GLuint MaxNativeAddressRegs;
2702    GLuint MaxNativeParameters;
2703    /* For shaders */
2704    GLuint MaxUniformComponents;  /**< Usually == MaxParameters * 4 */
2705    /* ES 2.0 and GL_ARB_ES2_compatibility */
2706    struct gl_precision LowFloat, MediumFloat, HighFloat;
2707    struct gl_precision LowInt, MediumInt, HighInt;
2708 };
2709
2710
2711 /**
2712  * Constants which may be overridden by device driver during context creation
2713  * but are never changed after that.
2714  */
2715 struct gl_constants
2716 {
2717    GLint MaxTextureMbytes;      /**< Max memory per image, in MB */
2718    GLint MaxTextureLevels;      /**< Max mipmap levels. */
2719    GLint Max3DTextureLevels;    /**< Max mipmap levels for 3D textures */
2720    GLint MaxCubeTextureLevels;  /**< Max mipmap levels for cube textures */
2721    GLint MaxArrayTextureLayers; /**< Max layers in array textures */
2722    GLint MaxTextureRectSize;    /**< Max rectangle texture size, in pixes */
2723    GLuint MaxTextureCoordUnits;
2724    GLuint MaxTextureImageUnits;
2725    GLuint MaxVertexTextureImageUnits;
2726    GLuint MaxCombinedTextureImageUnits;
2727    GLuint MaxGeometryTextureImageUnits;
2728    GLuint MaxTextureUnits;           /**< = MIN(CoordUnits, ImageUnits) */
2729    GLfloat MaxTextureMaxAnisotropy;  /**< GL_EXT_texture_filter_anisotropic */
2730    GLfloat MaxTextureLodBias;        /**< GL_EXT_texture_lod_bias */
2731    GLuint MaxTextureBufferSize;      /**< GL_ARB_texture_buffer_object */
2732
2733    GLuint MaxArrayLockSize;
2734
2735    GLint SubPixelBits;
2736
2737    GLfloat MinPointSize, MaxPointSize;       /**< aliased */
2738    GLfloat MinPointSizeAA, MaxPointSizeAA;   /**< antialiased */
2739    GLfloat PointSizeGranularity;
2740    GLfloat MinLineWidth, MaxLineWidth;       /**< aliased */
2741    GLfloat MinLineWidthAA, MaxLineWidthAA;   /**< antialiased */
2742    GLfloat LineWidthGranularity;
2743
2744    GLuint MaxColorTableSize;
2745
2746    GLuint MaxClipPlanes;
2747    GLuint MaxLights;
2748    GLfloat MaxShininess;                     /**< GL_NV_light_max_exponent */
2749    GLfloat MaxSpotExponent;                  /**< GL_NV_light_max_exponent */
2750
2751    GLuint MaxViewportWidth, MaxViewportHeight;
2752
2753    struct gl_program_constants VertexProgram;   /**< GL_ARB_vertex_program */
2754    struct gl_program_constants FragmentProgram; /**< GL_ARB_fragment_program */
2755    struct gl_program_constants GeometryProgram;  /**< GL_ARB_geometry_shader4 */
2756    GLuint MaxProgramMatrices;
2757    GLuint MaxProgramMatrixStackDepth;
2758
2759    /** vertex array / buffer object bounds checking */
2760    GLboolean CheckArrayBounds;
2761
2762    GLuint MaxDrawBuffers;    /**< GL_ARB_draw_buffers */
2763
2764    GLuint MaxColorAttachments;   /**< GL_EXT_framebuffer_object */
2765    GLuint MaxRenderbufferSize;   /**< GL_EXT_framebuffer_object */
2766    GLuint MaxSamples;            /**< GL_ARB_framebuffer_object */
2767
2768    /** Number of varying vectors between vertex and fragment shaders */
2769    GLuint MaxVarying;
2770    GLuint MaxVertexVaryingComponents;   /**< Between vert and geom shader */
2771    GLuint MaxGeometryVaryingComponents; /**< Between geom and frag shader */
2772
2773    /** GL_ARB_geometry_shader4 */
2774    GLuint MaxGeometryOutputVertices;
2775    GLuint MaxGeometryTotalOutputComponents;
2776
2777    GLuint GLSLVersion;  /**< GLSL version supported (ex: 120 = 1.20) */
2778
2779    /**
2780     * Does the driver support real 32-bit integers?  (Otherwise, integers are
2781     * simulated via floats.)
2782     */
2783    GLboolean NativeIntegers;
2784
2785    /**
2786     * If the driver supports real 32-bit integers, what integer value should be
2787     * used for boolean true in uniform uploads?  (Usually 1 or ~0.)
2788     */
2789    GLuint UniformBooleanTrue;
2790
2791    /** Which texture units support GL_ATI_envmap_bumpmap as targets */
2792    GLbitfield SupportedBumpUnits;
2793
2794    /**
2795     * Maximum amount of time, measured in nanseconds, that the server can wait.
2796     */
2797    GLuint64 MaxServerWaitTimeout;
2798
2799    /** GL_EXT_provoking_vertex */
2800    GLboolean QuadsFollowProvokingVertexConvention;
2801
2802    /** OpenGL version 3.0 */
2803    GLbitfield ContextFlags;  /**< Ex: GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT */
2804
2805    /** OpenGL version 3.2 */
2806    GLbitfield ProfileMask;   /**< Mask of CONTEXT_x_PROFILE_BIT */
2807
2808    /** GL_EXT_transform_feedback */
2809    GLuint MaxTransformFeedbackSeparateAttribs;
2810    GLuint MaxTransformFeedbackSeparateComponents;
2811    GLuint MaxTransformFeedbackInterleavedComponents;
2812
2813    /** GL_EXT_gpu_shader4 */
2814    GLint MinProgramTexelOffset, MaxProgramTexelOffset;
2815
2816    /* GL_EXT_framebuffer_sRGB */
2817    GLboolean sRGBCapable; /* can enable sRGB blend/update on FBOs */
2818
2819    /* GL_ARB_robustness */
2820    GLenum ResetStrategy;
2821
2822    /**
2823     * Whether the implementation strips out and ignores texture borders.
2824     *
2825     * Many GPU hardware implementations don't support rendering with texture
2826     * borders and mipmapped textures.  (Note: not static border color, but the
2827     * old 1-pixel border around each edge).  Implementations then have to do
2828     * slow fallbacks to be correct, or just ignore the border and be fast but
2829     * wrong.  Setting the flag stripts the border off of TexImage calls,
2830     * providing "fast but wrong" at significantly reduced driver complexity.
2831     *
2832     * Texture borders are deprecated in GL 3.0.
2833     **/
2834    GLboolean StripTextureBorder;
2835
2836    /**
2837     * For drivers which can do a better job at eliminating unused varyings
2838     * and uniforms than the GLSL compiler.
2839     *
2840     * XXX Remove these as soon as a better solution is available.
2841     */
2842    GLboolean GLSLSkipStrictMaxVaryingLimitCheck;
2843    GLboolean GLSLSkipStrictMaxUniformLimitCheck;
2844 };
2845
2846
2847 /**
2848  * Enable flag for each OpenGL extension.  Different device drivers will
2849  * enable different extensions at runtime.
2850  */
2851 struct gl_extensions
2852 {
2853    GLboolean dummy;  /* don't remove this! */
2854    GLboolean dummy_true;  /* Set true by _mesa_init_extensions(). */
2855    GLboolean dummy_false; /* Set false by _mesa_init_extensions(). */
2856    GLboolean ARB_ES2_compatibility;
2857    GLboolean ARB_blend_func_extended;
2858    GLboolean ARB_color_buffer_float;
2859    GLboolean ARB_conservative_depth;
2860    GLboolean ARB_copy_buffer;
2861    GLboolean ARB_depth_buffer_float;
2862    GLboolean ARB_depth_clamp;
2863    GLboolean ARB_depth_texture;
2864    GLboolean ARB_draw_buffers_blend;
2865    GLboolean ARB_draw_elements_base_vertex;
2866    GLboolean ARB_draw_instanced;
2867    GLboolean ARB_fragment_coord_conventions;
2868    GLboolean ARB_fragment_program;
2869    GLboolean ARB_fragment_program_shadow;
2870    GLboolean ARB_fragment_shader;
2871    GLboolean ARB_framebuffer_object;
2872    GLboolean ARB_explicit_attrib_location;
2873    GLboolean ARB_geometry_shader4;
2874    GLboolean ARB_half_float_pixel;
2875    GLboolean ARB_half_float_vertex;
2876    GLboolean ARB_instanced_arrays;
2877    GLboolean ARB_map_buffer_range;
2878    GLboolean ARB_occlusion_query;
2879    GLboolean ARB_occlusion_query2;
2880    GLboolean ARB_point_sprite;
2881    GLboolean ARB_sampler_objects;
2882    GLboolean ARB_seamless_cube_map;
2883    GLboolean ARB_shader_objects;
2884    GLboolean ARB_shader_stencil_export;
2885    GLboolean ARB_shader_texture_lod;
2886    GLboolean ARB_shading_language_100;
2887    GLboolean ARB_shadow;
2888    GLboolean ARB_shadow_ambient;
2889    GLboolean ARB_sync;
2890    GLboolean ARB_texture_border_clamp;
2891    GLboolean ARB_texture_buffer_object;
2892    GLboolean ARB_texture_compression_rgtc;
2893    GLboolean ARB_texture_cube_map;
2894    GLboolean ARB_texture_env_combine;
2895    GLboolean ARB_texture_env_crossbar;
2896    GLboolean ARB_texture_env_dot3;
2897    GLboolean ARB_texture_float;
2898    GLboolean ARB_texture_multisample;
2899    GLboolean ARB_texture_non_power_of_two;
2900    GLboolean ARB_texture_rg;
2901    GLboolean ARB_texture_rgb10_a2ui;
2902    GLboolean ARB_texture_storage;
2903    GLboolean ARB_timer_query;
2904    GLboolean ARB_transform_feedback2;
2905    GLboolean ARB_transpose_matrix;
2906    GLboolean ARB_uniform_buffer_object;
2907    GLboolean ARB_vertex_array_object;
2908    GLboolean ARB_vertex_program;
2909    GLboolean ARB_vertex_shader;
2910    GLboolean ARB_vertex_type_2_10_10_10_rev;
2911    GLboolean ARB_window_pos;
2912    GLboolean EXT_blend_color;
2913    GLboolean EXT_blend_equation_separate;
2914    GLboolean EXT_blend_func_separate;
2915    GLboolean EXT_blend_minmax;
2916    GLboolean EXT_clip_volume_hint;
2917    GLboolean EXT_compiled_vertex_array;
2918    GLboolean EXT_depth_bounds_test;
2919    GLboolean EXT_draw_buffers2;
2920    GLboolean EXT_draw_range_elements;
2921    GLboolean EXT_fog_coord;
2922    GLboolean EXT_framebuffer_blit;
2923    GLboolean EXT_framebuffer_multisample;
2924    GLboolean EXT_framebuffer_object;
2925    GLboolean EXT_framebuffer_sRGB;
2926    GLboolean EXT_gpu_program_parameters;
2927    GLboolean EXT_gpu_shader4;
2928    GLboolean EXT_packed_depth_stencil;
2929    GLboolean EXT_packed_float;
2930    GLboolean EXT_packed_pixels;
2931    GLboolean EXT_pixel_buffer_object;
2932    GLboolean EXT_point_parameters;
2933    GLboolean EXT_provoking_vertex;
2934    GLboolean EXT_rescale_normal;
2935    GLboolean EXT_shadow_funcs;
2936    GLboolean EXT_secondary_color;
2937    GLboolean EXT_separate_shader_objects;
2938    GLboolean EXT_separate_specular_color;
2939    GLboolean EXT_stencil_two_side;
2940    GLboolean EXT_texture3D;
2941    GLboolean EXT_texture_array;
2942    GLboolean EXT_texture_compression_latc;
2943    GLboolean EXT_texture_compression_s3tc;
2944    GLboolean EXT_texture_env_dot3;
2945    GLboolean EXT_texture_filter_anisotropic;
2946    GLboolean EXT_texture_integer;
2947    GLboolean EXT_texture_mirror_clamp;
2948    GLboolean EXT_texture_shared_exponent;
2949    GLboolean EXT_texture_snorm;
2950    GLboolean EXT_texture_sRGB;
2951    GLboolean EXT_texture_sRGB_decode;
2952    GLboolean EXT_texture_swizzle;
2953    GLboolean EXT_transform_feedback;
2954    GLboolean EXT_timer_query;
2955    GLboolean EXT_vertex_array_bgra;
2956    GLboolean OES_standard_derivatives;
2957    /* vendor extensions */
2958    GLboolean AMD_seamless_cubemap_per_texture;
2959    GLboolean APPLE_packed_pixels;
2960    GLboolean APPLE_vertex_array_object;
2961    GLboolean APPLE_object_purgeable;
2962    GLboolean ATI_envmap_bumpmap;
2963    GLboolean ATI_texture_compression_3dc;
2964    GLboolean ATI_texture_mirror_once;
2965    GLboolean ATI_texture_env_combine3;
2966    GLboolean ATI_fragment_shader;
2967    GLboolean ATI_separate_stencil;
2968    GLboolean IBM_rasterpos_clip;
2969    GLboolean IBM_multimode_draw_arrays;
2970    GLboolean MESA_pack_invert;
2971    GLboolean MESA_resize_buffers;
2972    GLboolean MESA_ycbcr_texture;
2973    GLboolean MESA_texture_array;
2974    GLboolean NV_blend_square;
2975    GLboolean NV_conditional_render;
2976    GLboolean NV_fog_distance;
2977    GLboolean NV_fragment_program;
2978    GLboolean NV_fragment_program_option;
2979    GLboolean NV_light_max_exponent;
2980    GLboolean NV_point_sprite;
2981    GLboolean NV_primitive_restart;
2982    GLboolean NV_texture_barrier;
2983    GLboolean NV_texgen_reflection;
2984    GLboolean NV_texture_env_combine4;
2985    GLboolean NV_texture_rectangle;
2986    GLboolean NV_vertex_program;
2987    GLboolean NV_vertex_program1_1;
2988    GLboolean SGIS_texture_lod;
2989    GLboolean TDFX_texture_compression_FXT1;
2990    GLboolean S3_s3tc;
2991    GLboolean OES_EGL_image;
2992    GLboolean OES_draw_texture;
2993    GLboolean OES_EGL_image_external;
2994    GLboolean OES_compressed_ETC1_RGB8_texture;
2995    GLboolean extension_sentinel;
2996    /** The extension string */
2997    const GLubyte *String;
2998    /** Number of supported extensions */
2999    GLuint Count;
3000 };
3001
3002
3003 /**
3004  * A stack of matrices (projection, modelview, color, texture, etc).
3005  */
3006 struct gl_matrix_stack
3007 {
3008    GLmatrix *Top;      /**< points into Stack */
3009    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
3010    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
3011    GLuint MaxDepth;    /**< size of Stack[] array */
3012    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
3013 };
3014
3015
3016 /**
3017  * \name Bits for image transfer operations
3018  * \sa __struct gl_contextRec::ImageTransferState.
3019  */
3020 /*@{*/
3021 #define IMAGE_SCALE_BIAS_BIT                      0x1
3022 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
3023 #define IMAGE_MAP_COLOR_BIT                       0x4
3024 #define IMAGE_CLAMP_BIT                           0x800
3025
3026
3027 /** Pixel Transfer ops */
3028 #define IMAGE_BITS (IMAGE_SCALE_BIAS_BIT |                      \
3029                     IMAGE_SHIFT_OFFSET_BIT |                    \
3030                     IMAGE_MAP_COLOR_BIT)
3031
3032 /**
3033  * \name Bits to indicate what state has changed.
3034  */
3035 /*@{*/
3036 #define _NEW_MODELVIEW         (1 << 0)   /**< gl_context::ModelView */
3037 #define _NEW_PROJECTION        (1 << 1)   /**< gl_context::Projection */
3038 #define _NEW_TEXTURE_MATRIX    (1 << 2)   /**< gl_context::TextureMatrix */
3039 #define _NEW_COLOR             (1 << 3)   /**< gl_context::Color */
3040 #define _NEW_DEPTH             (1 << 4)   /**< gl_context::Depth */
3041 #define _NEW_EVAL              (1 << 5)   /**< gl_context::Eval, EvalMap */
3042 #define _NEW_FOG               (1 << 6)   /**< gl_context::Fog */
3043 #define _NEW_HINT              (1 << 7)   /**< gl_context::Hint */
3044 #define _NEW_LIGHT             (1 << 8)   /**< gl_context::Light */
3045 #define _NEW_LINE              (1 << 9)   /**< gl_context::Line */
3046 #define _NEW_PIXEL             (1 << 10)  /**< gl_context::Pixel */
3047 #define _NEW_POINT             (1 << 11)  /**< gl_context::Point */
3048 #define _NEW_POLYGON           (1 << 12)  /**< gl_context::Polygon */
3049 #define _NEW_POLYGONSTIPPLE    (1 << 13)  /**< gl_context::PolygonStipple */
3050 #define _NEW_SCISSOR           (1 << 14)  /**< gl_context::Scissor */
3051 #define _NEW_STENCIL           (1 << 15)  /**< gl_context::Stencil */
3052 #define _NEW_TEXTURE           (1 << 16)  /**< gl_context::Texture */
3053 #define _NEW_TRANSFORM         (1 << 17)  /**< gl_context::Transform */
3054 #define _NEW_VIEWPORT          (1 << 18)  /**< gl_context::Viewport */
3055 #define _NEW_PACKUNPACK        (1 << 19)  /**< gl_context::Pack, Unpack */
3056 #define _NEW_ARRAY             (1 << 20)  /**< gl_context::Array */
3057 #define _NEW_RENDERMODE        (1 << 21)  /**< gl_context::RenderMode, etc */
3058 #define _NEW_BUFFERS           (1 << 22)  /**< gl_context::Visual, DrawBuffer, */
3059 #define _NEW_CURRENT_ATTRIB    (1 << 23)  /**< gl_context::Current */
3060 #define _NEW_MULTISAMPLE       (1 << 24)  /**< gl_context::Multisample */
3061 #define _NEW_TRACK_MATRIX      (1 << 25)  /**< gl_context::VertexProgram */
3062 #define _NEW_PROGRAM           (1 << 26)  /**< New program/shader state */
3063 #define _NEW_PROGRAM_CONSTANTS (1 << 27)
3064 #define _NEW_BUFFER_OBJECT     (1 << 28)
3065 #define _NEW_FRAG_CLAMP        (1 << 29)
3066 #define _NEW_TRANSFORM_FEEDBACK (1 << 30) /**< gl_context::TransformFeedback */
3067 #define _NEW_ALL ~0
3068 /*@}*/
3069
3070
3071 /**
3072  * \name A bunch of flags that we think might be useful to drivers.
3073  *
3074  * Set in the __struct gl_contextRec::_TriangleCaps bitfield.
3075  */
3076 /*@{*/
3077 #define DD_FLATSHADE                0x1
3078 #define DD_SEPARATE_SPECULAR        0x2
3079 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
3080 #define DD_TRI_LIGHT_TWOSIDE        0x8
3081 #define DD_TRI_UNFILLED             0x10
3082 #define DD_TRI_SMOOTH               0x20
3083 #define DD_TRI_STIPPLE              0x40
3084 #define DD_TRI_OFFSET               0x80
3085 #define DD_LINE_SMOOTH              0x100
3086 #define DD_LINE_STIPPLE             0x200
3087 #define DD_POINT_SMOOTH             0x400
3088 #define DD_POINT_ATTEN              0x800
3089 #define DD_TRI_TWOSTENCIL           0x1000
3090 /*@}*/
3091
3092
3093 /**
3094  * \name Define the state changes under which each of these bits might change
3095  */
3096 /*@{*/
3097 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
3098 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
3099 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
3100 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
3101 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
3102 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
3103 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
3104 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
3105 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
3106 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
3107 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
3108 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
3109 #define _DD_NEW_POINT_SIZE               _NEW_POINT
3110 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
3111 /*@}*/
3112
3113
3114 /**
3115  * Composite state flags
3116  */
3117 /*@{*/
3118 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
3119                                            _NEW_TEXTURE |       \
3120                                            _NEW_POINT |         \
3121                                            _NEW_PROGRAM |       \
3122                                            _NEW_MODELVIEW)
3123 /*@}*/
3124
3125
3126
3127
3128 /* This has to be included here. */
3129 #include "dd.h"
3130
3131
3132 /**
3133  * Display list flags.
3134  * Strictly this is a tnl-private concept, but it doesn't seem
3135  * worthwhile adding a tnl private structure just to hold this one bit
3136  * of information:
3137  */
3138 #define DLIST_DANGLING_REFS     0x1
3139
3140
3141 /** Opaque declaration of display list payload data type */
3142 union gl_dlist_node;
3143
3144
3145 /**
3146  * Provide a location where information about a display list can be
3147  * collected.  Could be extended with driverPrivate structures,
3148  * etc. in the future.
3149  */
3150 struct gl_display_list
3151 {
3152    GLuint Name;
3153    GLbitfield Flags;  /**< DLIST_x flags */
3154    /** The dlist commands are in a linked list of nodes */
3155    union gl_dlist_node *Head;
3156 };
3157
3158
3159 /**
3160  * State used during display list compilation and execution.
3161  */
3162 struct gl_dlist_state
3163 {
3164    GLuint CallDepth;            /**< Current recursion calling depth */
3165
3166    struct gl_display_list *CurrentList; /**< List currently being compiled */
3167    union gl_dlist_node *CurrentBlock; /**< Pointer to current block of nodes */
3168    GLuint CurrentPos;           /**< Index into current block of nodes */
3169
3170    GLvertexformat ListVtxfmt;
3171
3172    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
3173    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
3174
3175    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
3176    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
3177
3178    GLubyte ActiveIndex;
3179    GLfloat CurrentIndex;
3180
3181    GLubyte ActiveEdgeFlag;
3182    GLboolean CurrentEdgeFlag;
3183
3184    struct {
3185       /* State known to have been set by the currently-compiling display
3186        * list.  Used to eliminate some redundant state changes.
3187        */
3188       GLenum ShadeModel;
3189    } Current;
3190 };
3191
3192
3193 /**
3194  * Enum for the OpenGL APIs we know about and may support.
3195  */
3196 typedef enum
3197 {
3198    API_OPENGL,
3199    API_OPENGLES,
3200    API_OPENGLES2
3201 } gl_api;
3202
3203
3204 /**
3205  * Mesa rendering context.
3206  *
3207  * This is the central context data structure for Mesa.  Almost all
3208  * OpenGL state is contained in this structure.
3209  * Think of this as a base class from which device drivers will derive
3210  * sub classes.
3211  *
3212  * The struct gl_context typedef names this structure.
3213  */
3214 struct gl_context
3215 {
3216    /** State possibly shared with other contexts in the address space */
3217    struct gl_shared_state *Shared;
3218
3219    /** \name API function pointer tables */
3220    /*@{*/
3221    gl_api API;
3222    struct _glapi_table *Save;   /**< Display list save functions */
3223    struct _glapi_table *Exec;   /**< Execute functions */
3224    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
3225    /*@}*/
3226
3227    struct gl_config Visual;
3228    struct gl_framebuffer *DrawBuffer;   /**< buffer for writing */
3229    struct gl_framebuffer *ReadBuffer;   /**< buffer for reading */
3230    struct gl_framebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
3231    struct gl_framebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
3232
3233    /**
3234     * Device driver function pointer table
3235     */
3236    struct dd_function_table Driver;
3237
3238    void *DriverCtx;     /**< Points to device driver context/state */
3239
3240    /** Core/Driver constants */
3241    struct gl_constants Const;
3242
3243    /** \name The various 4x4 matrix stacks */
3244    /*@{*/
3245    struct gl_matrix_stack ModelviewMatrixStack;
3246    struct gl_matrix_stack ProjectionMatrixStack;
3247    struct gl_matrix_stack TextureMatrixStack[MAX_TEXTURE_UNITS];
3248    struct gl_matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
3249    struct gl_matrix_stack *CurrentStack; /**< Points to one of the above stacks */
3250    /*@}*/
3251
3252    /** Combined modelview and projection matrix */
3253    GLmatrix _ModelProjectMatrix;
3254
3255    /** \name Display lists */
3256    struct gl_dlist_state ListState;
3257
3258    GLboolean ExecuteFlag;       /**< Execute GL commands? */
3259    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
3260
3261    /** Extension information */
3262    struct gl_extensions Extensions;
3263
3264    /** Version info */
3265    GLuint VersionMajor, VersionMinor;
3266    char *VersionString;
3267
3268    /** \name State attribute stack (for glPush/PopAttrib) */
3269    /*@{*/
3270    GLuint AttribStackDepth;
3271    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
3272    /*@}*/
3273
3274    /** \name Renderer attribute groups
3275     *
3276     * We define a struct for each attribute group to make pushing and popping
3277     * attributes easy.  Also it's a good organization.
3278     */
3279    /*@{*/
3280    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
3281    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
3282    struct gl_current_attrib     Current;        /**< Current attributes */
3283    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
3284    struct gl_eval_attrib        Eval;           /**< Eval attributes */
3285    struct gl_fog_attrib         Fog;            /**< Fog attributes */
3286    struct gl_hint_attrib        Hint;           /**< Hint attributes */
3287    struct gl_light_attrib       Light;          /**< Light attributes */
3288    struct gl_line_attrib        Line;           /**< Line attributes */
3289    struct gl_list_attrib        List;           /**< List attributes */
3290    struct gl_multisample_attrib Multisample;
3291    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
3292    struct gl_point_attrib       Point;          /**< Point attributes */
3293    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
3294    GLuint PolygonStipple[32];                   /**< Polygon stipple */
3295    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
3296    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
3297    struct gl_texture_attrib     Texture;        /**< Texture attributes */
3298    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
3299    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
3300    /*@}*/
3301
3302    /** \name Client attribute stack */
3303    /*@{*/
3304    GLuint ClientAttribStackDepth;
3305    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
3306    /*@}*/
3307
3308    /** \name Client attribute groups */
3309    /*@{*/
3310    struct gl_array_attrib       Array;  /**< Vertex arrays */
3311    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
3312    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
3313    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
3314    /*@}*/
3315
3316    /** \name Other assorted state (not pushed/popped on attribute stack) */
3317    /*@{*/
3318    struct gl_pixelmaps          PixelMaps;
3319
3320    struct gl_evaluators EvalMap;   /**< All evaluators */
3321    struct gl_feedback   Feedback;  /**< Feedback */
3322    struct gl_selection  Select;    /**< Selection */
3323
3324    struct gl_program_state Program;  /**< general program state */
3325    struct gl_vertex_program_state VertexProgram;
3326    struct gl_fragment_program_state FragmentProgram;
3327    struct gl_geometry_program_state GeometryProgram;
3328    struct gl_ati_fragment_shader_state ATIFragmentShader;
3329
3330    struct gl_shader_state Shader; /**< GLSL shader object state */
3331    struct gl_shader_compiler_options ShaderCompilerOptions[MESA_SHADER_TYPES];
3332
3333    struct gl_query_state Query;  /**< occlusion, timer queries */
3334
3335    struct gl_transform_feedback TransformFeedback;
3336
3337    struct gl_buffer_object *CopyReadBuffer; /**< GL_ARB_copy_buffer */
3338    struct gl_buffer_object *CopyWriteBuffer; /**< GL_ARB_copy_buffer */
3339    /*@}*/
3340
3341    struct gl_meta_state *Meta;  /**< for "meta" operations */
3342
3343    /* GL_EXT_framebuffer_object */
3344    struct gl_renderbuffer *CurrentRenderbuffer;
3345
3346    GLenum ErrorValue;        /**< Last error code */
3347
3348    /* GL_ARB_robustness */
3349    GLenum ResetStatus;
3350
3351    /**
3352     * Recognize and silence repeated error debug messages in buggy apps.
3353     */
3354    const char *ErrorDebugFmtString;
3355    GLuint ErrorDebugCount;
3356
3357    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
3358    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
3359
3360    GLboolean ViewportInitialized;  /**< has viewport size been initialized? */
3361
3362    GLbitfield64 varying_vp_inputs;  /**< mask of VERT_BIT_* flags */
3363
3364    /** \name Derived state */
3365    /*@{*/
3366    /** Bitwise-or of DD_* flags.  Note that this bitfield may be used before
3367     * state validation so they need to always be current.
3368     */
3369    GLbitfield _TriangleCaps;
3370    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
3371    GLfloat _EyeZDir[3];
3372    GLfloat _ModelViewInvScale;
3373    GLboolean _NeedEyeCoords;
3374    GLboolean _ForceEyeCoords;
3375
3376    GLuint TextureStateTimestamp; /**< detect changes to shared state */
3377
3378    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
3379    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
3380    /**@}*/
3381
3382    struct gl_list_extensions *ListExt; /**< driver dlist extensions */
3383
3384    /** \name For debugging/development only */
3385    /*@{*/
3386    GLboolean FirstTimeCurrent;
3387    /*@}*/
3388
3389    /** software compression/decompression supported or not */
3390    GLboolean Mesa_DXTn;
3391
3392    GLboolean TextureFormatSupported[MESA_FORMAT_COUNT];
3393
3394    /**
3395     * Use dp4 (rather than mul/mad) instructions for position
3396     * transformation?
3397     */
3398    GLboolean mvp_with_dp4;
3399
3400    /**
3401     * \name Hooks for module contexts.
3402     *
3403     * These will eventually live in the driver or elsewhere.
3404     */
3405    /*@{*/
3406    void *swrast_context;
3407    void *swsetup_context;
3408    void *swtnl_context;
3409    void *swtnl_im;
3410    struct st_context *st;
3411    void *aelt_context;
3412    /*@}*/
3413 };
3414
3415
3416 #ifdef DEBUG
3417 extern int MESA_VERBOSE;
3418 extern int MESA_DEBUG_FLAGS;
3419 # define MESA_FUNCTION __FUNCTION__
3420 #else
3421 # define MESA_VERBOSE 0
3422 # define MESA_DEBUG_FLAGS 0
3423 # define MESA_FUNCTION "a function"
3424 # ifndef NDEBUG
3425 #  define NDEBUG
3426 # endif
3427 #endif
3428
3429
3430 /** The MESA_VERBOSE var is a bitmask of these flags */
3431 enum _verbose
3432 {
3433    VERBOSE_VARRAY               = 0x0001,
3434    VERBOSE_TEXTURE              = 0x0002,
3435    VERBOSE_MATERIAL             = 0x0004,
3436    VERBOSE_PIPELINE             = 0x0008,
3437    VERBOSE_DRIVER               = 0x0010,
3438    VERBOSE_STATE                = 0x0020,
3439    VERBOSE_API                  = 0x0040,
3440    VERBOSE_DISPLAY_LIST         = 0x0100,
3441    VERBOSE_LIGHTING             = 0x0200,
3442    VERBOSE_PRIMS                = 0x0400,
3443    VERBOSE_VERTS                = 0x0800,
3444    VERBOSE_DISASSEM             = 0x1000,
3445    VERBOSE_DRAW                 = 0x2000,
3446    VERBOSE_SWAPBUFFERS          = 0x4000
3447 };
3448
3449
3450 /** The MESA_DEBUG_FLAGS var is a bitmask of these flags */
3451 enum _debug
3452 {
3453    DEBUG_ALWAYS_FLUSH           = 0x1
3454 };
3455
3456
3457
3458 #ifdef __cplusplus
3459 }
3460 #endif
3461
3462 #endif /* MTYPES_H */