src/mesa/main/mtypes.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.7
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file mtypes.h
  28  * Main Mesa data structures.
  29  *
  30  * Please try to mark derived values with a leading underscore ('_').
  31  */
  32
  33 #ifndef MTYPES_H
  34 #define MTYPES_H
  35
  36
  37 #include "main/glheader.h"
  38 #include "main/config.h"
  39 #include "main/mfeatures.h"
  40 #include "glapi/glapi.h"
  41 #include "math/m_matrix.h"      /* GLmatrix */
  42 #include "main/simple_list.h"   /* struct simple_node */
  43 #include "main/formats.h"       /* MESA_FORMAT_COUNT */
  44
  45
  46 /**
  47  * Stencil buffer data type.
  48  */
  49 #if STENCIL_BITS==8
  50    typedef GLubyte GLstencil;
  51 #elif STENCIL_BITS==16
  52    typedef GLushort GLstencil;
  53 #else
  54 #  error "illegal number of stencil bits"
  55 #endif
  56
  57
  58 /**
  59  * \name 64-bit extension of GLbitfield.
  60  */
  61 /*@{*/
  62 typedef GLuint64 GLbitfield64;
  63
  64 /** Set a single bit */
  65 #define BITFIELD64_BIT(b)      ((GLbitfield64)1 << (b))
  66
  67
  68 /**
  69  * \name Some forward type declarations
  70  */
  71 /*@{*/
  72 struct _mesa_HashTable;
  73 struct gl_attrib_node;
  74 struct gl_list_extensions;
  75 struct gl_meta_state;
  76 struct gl_pixelstore_attrib;
  77 struct gl_program_cache;
  78 struct gl_texture_format;
  79 struct gl_texture_image;
  80 struct gl_texture_object;
  81 struct gl_context;
  82 struct st_context;
  83 /*@}*/
  84
  85
  86 /** Extra draw modes beyond GL_POINTS, GL_TRIANGLE_FAN, etc */
  87 #define PRIM_OUTSIDE_BEGIN_END   (GL_POLYGON+1)
  88 #define PRIM_INSIDE_UNKNOWN_PRIM (GL_POLYGON+2)
  89 #define PRIM_UNKNOWN             (GL_POLYGON+3)
  90
  91
  92 /**
  93  * Shader stages. Note that these will become 5 with tessellation.
  94  * These MUST have the same values as gallium's PIPE_SHADER_*
  95  */
  96 typedef enum
  97 {
  98    MESA_SHADER_VERTEX = 0,
  99    MESA_SHADER_FRAGMENT = 1,
 100    MESA_SHADER_GEOMETRY = 2,
 101    MESA_SHADER_TYPES = 3
 102 } gl_shader_type;
 103
 104
 105
 106 /**
 107  * Indexes for vertex program attributes.
 108  * GL_NV_vertex_program aliases generic attributes over the conventional
 109  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 110  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 111  * generic attributes are distinct/separate).
 112  */
 113 typedef enum
 114 {
 115    VERT_ATTRIB_POS = 0,
 116    VERT_ATTRIB_WEIGHT = 1,
 117    VERT_ATTRIB_NORMAL = 2,
 118    VERT_ATTRIB_COLOR0 = 3,
 119    VERT_ATTRIB_COLOR1 = 4,
 120    VERT_ATTRIB_FOG = 5,
 121    VERT_ATTRIB_COLOR_INDEX = 6,
 122    VERT_ATTRIB_POINT_SIZE = 6,  /*alias*/
 123    VERT_ATTRIB_EDGEFLAG = 7,
 124    VERT_ATTRIB_TEX0 = 8,
 125    VERT_ATTRIB_TEX1 = 9,
 126    VERT_ATTRIB_TEX2 = 10,
 127    VERT_ATTRIB_TEX3 = 11,
 128    VERT_ATTRIB_TEX4 = 12,
 129    VERT_ATTRIB_TEX5 = 13,
 130    VERT_ATTRIB_TEX6 = 14,
 131    VERT_ATTRIB_TEX7 = 15,
 132    VERT_ATTRIB_GENERIC0 = 16,
 133    VERT_ATTRIB_GENERIC1 = 17,
 134    VERT_ATTRIB_GENERIC2 = 18,
 135    VERT_ATTRIB_GENERIC3 = 19,
 136    VERT_ATTRIB_GENERIC4 = 20,
 137    VERT_ATTRIB_GENERIC5 = 21,
 138    VERT_ATTRIB_GENERIC6 = 22,
 139    VERT_ATTRIB_GENERIC7 = 23,
 140    VERT_ATTRIB_GENERIC8 = 24,
 141    VERT_ATTRIB_GENERIC9 = 25,
 142    VERT_ATTRIB_GENERIC10 = 26,
 143    VERT_ATTRIB_GENERIC11 = 27,
 144    VERT_ATTRIB_GENERIC12 = 28,
 145    VERT_ATTRIB_GENERIC13 = 29,
 146    VERT_ATTRIB_GENERIC14 = 30,
 147    VERT_ATTRIB_GENERIC15 = 31,
 148    VERT_ATTRIB_MAX = 32
 149 } gl_vert_attrib;
 150
 151 /**
 152  * Bitflags for vertex attributes.
 153  * These are used in bitfields in many places.
 154  */
 155 /*@{*/
 156 #define VERT_BIT_POS         (1 << VERT_ATTRIB_POS)
 157 #define VERT_BIT_WEIGHT      (1 << VERT_ATTRIB_WEIGHT)
 158 #define VERT_BIT_NORMAL      (1 << VERT_ATTRIB_NORMAL)
 159 #define VERT_BIT_COLOR0      (1 << VERT_ATTRIB_COLOR0)
 160 #define VERT_BIT_COLOR1      (1 << VERT_ATTRIB_COLOR1)
 161 #define VERT_BIT_FOG         (1 << VERT_ATTRIB_FOG)
 162 #define VERT_BIT_COLOR_INDEX (1 << VERT_ATTRIB_COLOR_INDEX)
 163 #define VERT_BIT_EDGEFLAG    (1 << VERT_ATTRIB_EDGEFLAG)
 164 #define VERT_BIT_TEX0        (1 << VERT_ATTRIB_TEX0)
 165 #define VERT_BIT_TEX1        (1 << VERT_ATTRIB_TEX1)
 166 #define VERT_BIT_TEX2        (1 << VERT_ATTRIB_TEX2)
 167 #define VERT_BIT_TEX3        (1 << VERT_ATTRIB_TEX3)
 168 #define VERT_BIT_TEX4        (1 << VERT_ATTRIB_TEX4)
 169 #define VERT_BIT_TEX5        (1 << VERT_ATTRIB_TEX5)
 170 #define VERT_BIT_TEX6        (1 << VERT_ATTRIB_TEX6)
 171 #define VERT_BIT_TEX7        (1 << VERT_ATTRIB_TEX7)
 172 #define VERT_BIT_GENERIC0    (1 << VERT_ATTRIB_GENERIC0)
 173 #define VERT_BIT_GENERIC1    (1 << VERT_ATTRIB_GENERIC1)
 174 #define VERT_BIT_GENERIC2    (1 << VERT_ATTRIB_GENERIC2)
 175 #define VERT_BIT_GENERIC3    (1 << VERT_ATTRIB_GENERIC3)
 176 #define VERT_BIT_GENERIC4    (1 << VERT_ATTRIB_GENERIC4)
 177 #define VERT_BIT_GENERIC5    (1 << VERT_ATTRIB_GENERIC5)
 178 #define VERT_BIT_GENERIC6    (1 << VERT_ATTRIB_GENERIC6)
 179 #define VERT_BIT_GENERIC7    (1 << VERT_ATTRIB_GENERIC7)
 180 #define VERT_BIT_GENERIC8    (1 << VERT_ATTRIB_GENERIC8)
 181 #define VERT_BIT_GENERIC9    (1 << VERT_ATTRIB_GENERIC9)
 182 #define VERT_BIT_GENERIC10   (1 << VERT_ATTRIB_GENERIC10)
 183 #define VERT_BIT_GENERIC11   (1 << VERT_ATTRIB_GENERIC11)
 184 #define VERT_BIT_GENERIC12   (1 << VERT_ATTRIB_GENERIC12)
 185 #define VERT_BIT_GENERIC13   (1 << VERT_ATTRIB_GENERIC13)
 186 #define VERT_BIT_GENERIC14   (1 << VERT_ATTRIB_GENERIC14)
 187 #define VERT_BIT_GENERIC15   (1 << VERT_ATTRIB_GENERIC15)
 188
 189 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 190 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 191 /*@}*/
 192
 193
 194 /**
 195  * Indexes for vertex program result attributes.  Note that
 196  * _mesa_vert_result_to_frag_attrib() and _mesa_frag_attrib_to_vert_result() make
 197  * assumptions about the layout of this enum.
 198  */
 199 typedef enum
 200 {
 201    VERT_RESULT_HPOS = 0,
 202    VERT_RESULT_COL0 = 1,
 203    VERT_RESULT_COL1 = 2,
 204    VERT_RESULT_FOGC = 3,
 205    VERT_RESULT_TEX0 = 4,
 206    VERT_RESULT_TEX1 = 5,
 207    VERT_RESULT_TEX2 = 6,
 208    VERT_RESULT_TEX3 = 7,
 209    VERT_RESULT_TEX4 = 8,
 210    VERT_RESULT_TEX5 = 9,
 211    VERT_RESULT_TEX6 = 10,
 212    VERT_RESULT_TEX7 = 11,
 213    VERT_RESULT_PSIZ = 12,
 214    VERT_RESULT_BFC0 = 13,
 215    VERT_RESULT_BFC1 = 14,
 216    VERT_RESULT_EDGE = 15,
 217    VERT_RESULT_CLIP_DIST0 = 16,
 218    VERT_RESULT_CLIP_DIST1 = 17,
 219    VERT_RESULT_VAR0 = 18,  /**< shader varying */
 220    VERT_RESULT_MAX = (VERT_RESULT_VAR0 + MAX_VARYING)
 221 } gl_vert_result;
 222
 223
 224 /*********************************************/
 225
 226 /**
 227  * Indexes for geometry program attributes.
 228  */
 229 typedef enum
 230 {
 231    GEOM_ATTRIB_POSITION = 0,
 232    GEOM_ATTRIB_COLOR0 = 1,
 233    GEOM_ATTRIB_COLOR1 = 2,
 234    GEOM_ATTRIB_SECONDARY_COLOR0 = 3,
 235    GEOM_ATTRIB_SECONDARY_COLOR1 = 4,
 236    GEOM_ATTRIB_FOG_FRAG_COORD = 5,
 237    GEOM_ATTRIB_POINT_SIZE = 6,
 238    GEOM_ATTRIB_CLIP_VERTEX = 7,
 239    GEOM_ATTRIB_PRIMITIVE_ID = 8,
 240    GEOM_ATTRIB_TEX_COORD = 9,
 241
 242    GEOM_ATTRIB_VAR0 = 16,
 243    GEOM_ATTRIB_MAX = (GEOM_ATTRIB_VAR0 + MAX_VARYING)
 244 } gl_geom_attrib;
 245
 246 /**
 247  * Bitflags for geometry attributes.
 248  * These are used in bitfields in many places.
 249  */
 250 /*@{*/
 251 #define GEOM_BIT_COLOR0      (1 << GEOM_ATTRIB_COLOR0)
 252 #define GEOM_BIT_COLOR1      (1 << GEOM_ATTRIB_COLOR1)
 253 #define GEOM_BIT_SCOLOR0     (1 << GEOM_ATTRIB_SECONDARY_COLOR0)
 254 #define GEOM_BIT_SCOLOR1     (1 << GEOM_ATTRIB_SECONDARY_COLOR1)
 255 #define GEOM_BIT_TEX_COORD   (1 << GEOM_ATTRIB_TEX_COORD)
 256 #define GEOM_BIT_FOG_COORD   (1 << GEOM_ATTRIB_FOG_FRAG_COORD)
 257 #define GEOM_BIT_POSITION    (1 << GEOM_ATTRIB_POSITION)
 258 #define GEOM_BIT_POINT_SIDE  (1 << GEOM_ATTRIB_POINT_SIZE)
 259 #define GEOM_BIT_CLIP_VERTEX (1 << GEOM_ATTRIB_CLIP_VERTEX)
 260 #define GEOM_BIT_PRIM_ID     (1 << GEOM_ATTRIB_PRIMITIVE_ID)
 261 #define GEOM_BIT_VAR0        (1 << GEOM_ATTRIB_VAR0)
 262
 263 #define GEOM_BIT_VAR(g)  (1 << (GEOM_BIT_VAR0 + (g)))
 264 /*@}*/
 265
 266
 267 /**
 268  * Indexes for geometry program result attributes
 269  */
 270 typedef enum
 271 {
 272    GEOM_RESULT_POS  = 0,
 273    GEOM_RESULT_COL0  = 1,
 274    GEOM_RESULT_COL1  = 2,
 275    GEOM_RESULT_SCOL0 = 3,
 276    GEOM_RESULT_SCOL1 = 4,
 277    GEOM_RESULT_FOGC = 5,
 278    GEOM_RESULT_TEX0 = 6,
 279    GEOM_RESULT_TEX1 = 7,
 280    GEOM_RESULT_TEX2 = 8,
 281    GEOM_RESULT_TEX3 = 9,
 282    GEOM_RESULT_TEX4 = 10,
 283    GEOM_RESULT_TEX5 = 11,
 284    GEOM_RESULT_TEX6 = 12,
 285    GEOM_RESULT_TEX7 = 13,
 286    GEOM_RESULT_PSIZ = 14,
 287    GEOM_RESULT_CLPV = 15,
 288    GEOM_RESULT_PRID = 16,
 289    GEOM_RESULT_LAYR = 17,
 290    GEOM_RESULT_VAR0 = 18,  /**< shader varying, should really be 16 */
 291    /* ### we need to -2 because var0 is 18 instead 16 like in the others */
 292    GEOM_RESULT_MAX  =  (GEOM_RESULT_VAR0 + MAX_VARYING - 2)
 293 } gl_geom_result;
 294
 295
 296 /**
 297  * Indexes for fragment program input attributes.  Note that
 298  * _mesa_vert_result_to_frag_attrib() and frag_attrib_to_vert_result() make
 299  * assumptions about the layout of this enum.
 300  */
 301 typedef enum
 302 {
 303    FRAG_ATTRIB_WPOS = 0,
 304    FRAG_ATTRIB_COL0 = 1,
 305    FRAG_ATTRIB_COL1 = 2,
 306    FRAG_ATTRIB_FOGC = 3,
 307    FRAG_ATTRIB_TEX0 = 4,
 308    FRAG_ATTRIB_TEX1 = 5,
 309    FRAG_ATTRIB_TEX2 = 6,
 310    FRAG_ATTRIB_TEX3 = 7,
 311    FRAG_ATTRIB_TEX4 = 8,
 312    FRAG_ATTRIB_TEX5 = 9,
 313    FRAG_ATTRIB_TEX6 = 10,
 314    FRAG_ATTRIB_TEX7 = 11,
 315    FRAG_ATTRIB_FACE = 12,  /**< front/back face */
 316    FRAG_ATTRIB_PNTC = 13,  /**< sprite/point coord */
 317    FRAG_ATTRIB_CLIP_DIST0 = 14,
 318    FRAG_ATTRIB_CLIP_DIST1 = 15,
 319    FRAG_ATTRIB_VAR0 = 16,  /**< shader varying */
 320    FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + MAX_VARYING)
 321 } gl_frag_attrib;
 322
 323
 324 /**
 325  * Convert from a gl_vert_result value to the corresponding gl_frag_attrib.
 326  *
 327  * VERT_RESULT_HPOS is converted to FRAG_ATTRIB_WPOS.
 328  *
 329  * gl_vert_result values which have no corresponding gl_frag_attrib
 330  * (VERT_RESULT_PSIZ, VERT_RESULT_BFC0, VERT_RESULT_BFC1, and
 331  * VERT_RESULT_EDGE) are converted to a value of -1.
 332  */
 333 static INLINE int
 334 _mesa_vert_result_to_frag_attrib(gl_vert_result vert_result)
 335 {
 336    if (vert_result >= VERT_RESULT_CLIP_DIST0)
 337       return vert_result - VERT_RESULT_CLIP_DIST0 + FRAG_ATTRIB_CLIP_DIST0;
 338    else if (vert_result <= VERT_RESULT_TEX7)
 339       return vert_result;
 340    else
 341       return -1;
 342 }
 343
 344
 345 /**
 346  * Convert from a gl_frag_attrib value to the corresponding gl_vert_result.
 347  *
 348  * FRAG_ATTRIB_WPOS is converted to VERT_RESULT_HPOS.
 349  *
 350  * gl_frag_attrib values which have no corresponding gl_vert_result
 351  * (FRAG_ATTRIB_FACE and FRAG_ATTRIB_PNTC) are converted to a value of -1.
 352  */
 353 static INLINE int
 354 _mesa_frag_attrib_to_vert_result(gl_frag_attrib frag_attrib)
 355 {
 356    if (frag_attrib <= FRAG_ATTRIB_TEX7)
 357       return frag_attrib;
 358    else if (frag_attrib >= FRAG_ATTRIB_CLIP_DIST0)
 359       return frag_attrib - FRAG_ATTRIB_CLIP_DIST0 + VERT_RESULT_CLIP_DIST0;
 360    else
 361       return -1;
 362 }
 363
 364
 365 /**
 366  * Bitflags for fragment program input attributes.
 367  */
 368 /*@{*/
 369 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 370 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 371 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 372 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 373 #define FRAG_BIT_FACE  (1 << FRAG_ATTRIB_FACE)
 374 #define FRAG_BIT_PNTC  (1 << FRAG_ATTRIB_PNTC)
 375 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 376 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 377 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 378 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 379 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 380 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 381 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 382 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 383 #define FRAG_BIT_VAR0  (1 << FRAG_ATTRIB_VAR0)
 384
 385 #define FRAG_BIT_TEX(U)  (FRAG_BIT_TEX0 << (U))
 386 #define FRAG_BIT_VAR(V)  (FRAG_BIT_VAR0 << (V))
 387
 388 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 389                            FRAG_BIT_TEX1|       \
 390                            FRAG_BIT_TEX2|       \
 391                            FRAG_BIT_TEX3|       \
 392                            FRAG_BIT_TEX4|       \
 393                            FRAG_BIT_TEX5|       \
 394                            FRAG_BIT_TEX6|       \
 395                            FRAG_BIT_TEX7)
 396 /*@}*/
 397
 398
 399 /**
 400  * Fragment program results
 401  */
 402 typedef enum
 403 {
 404    FRAG_RESULT_DEPTH = 0,
 405    FRAG_RESULT_STENCIL = 1,
 406    /* If a single color should be written to all render targets, this
 407     * register is written.  No FRAG_RESULT_DATAn will be written.
 408     */
 409    FRAG_RESULT_COLOR = 2,
 410
 411    /* FRAG_RESULT_DATAn are the per-render-target (GLSL gl_FragData[n]
 412     * or ARB_fragment_program fragment.color[n]) color results.  If
 413     * any are written, FRAG_RESULT_COLOR will not be written.
 414     */
 415    FRAG_RESULT_DATA0 = 3,
 416    FRAG_RESULT_MAX = (FRAG_RESULT_DATA0 + MAX_DRAW_BUFFERS)
 417 } gl_frag_result;
 418
 419
 420 /**
 421  * Indexes for all renderbuffers
 422  */
 423 typedef enum
 424 {
 425    /* the four standard color buffers */
 426    BUFFER_FRONT_LEFT,
 427    BUFFER_BACK_LEFT,
 428    BUFFER_FRONT_RIGHT,
 429    BUFFER_BACK_RIGHT,
 430    BUFFER_DEPTH,
 431    BUFFER_STENCIL,
 432    BUFFER_ACCUM,
 433    /* optional aux buffer */
 434    BUFFER_AUX0,
 435    /* generic renderbuffers */
 436    BUFFER_COLOR0,
 437    BUFFER_COLOR1,
 438    BUFFER_COLOR2,
 439    BUFFER_COLOR3,
 440    BUFFER_COLOR4,
 441    BUFFER_COLOR5,
 442    BUFFER_COLOR6,
 443    BUFFER_COLOR7,
 444    BUFFER_COUNT
 445 } gl_buffer_index;
 446
 447 /**
 448  * Bit flags for all renderbuffers
 449  */
 450 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 451 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 452 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 453 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 454 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 455 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 456 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 457 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 458 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 459 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 460 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 461 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 462 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 463 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 464 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 465 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 466 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 467 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 468 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 469
 470 /**
 471  * Mask of all the color buffer bits (but not accum).
 472  */
 473 #define BUFFER_BITS_COLOR  (BUFFER_BIT_FRONT_LEFT | \
 474                             BUFFER_BIT_BACK_LEFT | \
 475                             BUFFER_BIT_FRONT_RIGHT | \
 476                             BUFFER_BIT_BACK_RIGHT | \
 477                             BUFFER_BIT_AUX0 | \
 478                             BUFFER_BIT_COLOR0 | \
 479                             BUFFER_BIT_COLOR1 | \
 480                             BUFFER_BIT_COLOR2 | \
 481                             BUFFER_BIT_COLOR3 | \
 482                             BUFFER_BIT_COLOR4 | \
 483                             BUFFER_BIT_COLOR5 | \
 484                             BUFFER_BIT_COLOR6 | \
 485                             BUFFER_BIT_COLOR7)
 486
 487
 488 /**
 489  * Framebuffer configuration (aka visual / pixelformat)
 490  * Note: some of these fields should be boolean, but it appears that
 491  * code in drivers/dri/common/util.c requires int-sized fields.
 492  */
 493 struct gl_config
 494 {
 495    GLboolean rgbMode;
 496    GLboolean floatMode;
 497    GLboolean colorIndexMode;  /* XXX is this used anywhere? */
 498    GLuint doubleBufferMode;
 499    GLuint stereoMode;
 500
 501    GLboolean haveAccumBuffer;
 502    GLboolean haveDepthBuffer;
 503    GLboolean haveStencilBuffer;
 504
 505    GLint redBits, greenBits, blueBits, alphaBits;       /* bits per comp */
 506    GLuint redMask, greenMask, blueMask, alphaMask;
 507    GLint rgbBits;               /* total bits for rgb */
 508    GLint indexBits;             /* total bits for colorindex */
 509
 510    GLint accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits;
 511    GLint depthBits;
 512    GLint stencilBits;
 513
 514    GLint numAuxBuffers;
 515
 516    GLint level;
 517
 518    /* EXT_visual_rating / GLX 1.2 */
 519    GLint visualRating;
 520
 521    /* EXT_visual_info / GLX 1.2 */
 522    GLint transparentPixel;
 523    /*    colors are floats scaled to ints */
 524    GLint transparentRed, transparentGreen, transparentBlue, transparentAlpha;
 525    GLint transparentIndex;
 526
 527    /* ARB_multisample / SGIS_multisample */
 528    GLint sampleBuffers;
 529    GLint samples;
 530
 531    /* SGIX_pbuffer / GLX 1.3 */
 532    GLint maxPbufferWidth;
 533    GLint maxPbufferHeight;
 534    GLint maxPbufferPixels;
 535    GLint optimalPbufferWidth;   /* Only for SGIX_pbuffer. */
 536    GLint optimalPbufferHeight;  /* Only for SGIX_pbuffer. */
 537
 538    /* OML_swap_method */
 539    GLint swapMethod;
 540
 541    /* EXT_texture_from_pixmap */
 542    GLint bindToTextureRgb;
 543    GLint bindToTextureRgba;
 544    GLint bindToMipmapTexture;
 545    GLint bindToTextureTargets;
 546    GLint yInverted;
 547
 548    /* EXT_framebuffer_sRGB */
 549    GLint sRGBCapable;
 550 };
 551
 552
 553 /**
 554  * \name Bit flags used for updating material values.
 555  */
 556 /*@{*/
 557 #define MAT_ATTRIB_FRONT_AMBIENT           0
 558 #define MAT_ATTRIB_BACK_AMBIENT            1
 559 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 560 #define MAT_ATTRIB_BACK_DIFFUSE            3
 561 #define MAT_ATTRIB_FRONT_SPECULAR          4
 562 #define MAT_ATTRIB_BACK_SPECULAR           5
 563 #define MAT_ATTRIB_FRONT_EMISSION          6
 564 #define MAT_ATTRIB_BACK_EMISSION           7
 565 #define MAT_ATTRIB_FRONT_SHININESS         8
 566 #define MAT_ATTRIB_BACK_SHININESS          9
 567 #define MAT_ATTRIB_FRONT_INDEXES           10
 568 #define MAT_ATTRIB_BACK_INDEXES            11
 569 #define MAT_ATTRIB_MAX                     12
 570
 571 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 572 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 573 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 574 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 575 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 576 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 577
 578 #define MAT_INDEX_AMBIENT  0
 579 #define MAT_INDEX_DIFFUSE  1
 580 #define MAT_INDEX_SPECULAR 2
 581
 582 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 583 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 584 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 585 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 586 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 587 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 588 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 589 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 590 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 591 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 592 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 593 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 594
 595
 596 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 597                                  MAT_BIT_FRONT_AMBIENT |        \
 598                                  MAT_BIT_FRONT_DIFFUSE |        \
 599                                  MAT_BIT_FRONT_SPECULAR |       \
 600                                  MAT_BIT_FRONT_SHININESS |      \
 601                                  MAT_BIT_FRONT_INDEXES)
 602
 603 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 604                                  MAT_BIT_BACK_AMBIENT |         \
 605                                  MAT_BIT_BACK_DIFFUSE |         \
 606                                  MAT_BIT_BACK_SPECULAR |        \
 607                                  MAT_BIT_BACK_SHININESS |       \
 608                                  MAT_BIT_BACK_INDEXES)
 609
 610 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 611 /*@}*/
 612
 613
 614 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 615 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 616
 617 /**
 618  * Material shininess lookup table.
 619  */
 620 struct gl_shine_tab
 621 {
 622    struct gl_shine_tab *next, *prev;
 623    GLfloat tab[SHINE_TABLE_SIZE+1];
 624    GLfloat shininess;
 625    GLuint refcount;
 626 };
 627
 628
 629 /**
 630  * Light source state.
 631  */
 632 struct gl_light
 633 {
 634    struct gl_light *next;       /**< double linked list with sentinel */
 635    struct gl_light *prev;
 636
 637    GLfloat Ambient[4];          /**< ambient color */
 638    GLfloat Diffuse[4];          /**< diffuse color */
 639    GLfloat Specular[4];         /**< specular color */
 640    GLfloat EyePosition[4];      /**< position in eye coordinates */
 641    GLfloat SpotDirection[4];    /**< spotlight direction in eye coordinates */
 642    GLfloat SpotExponent;
 643    GLfloat SpotCutoff;          /**< in degrees */
 644    GLfloat _CosCutoffNeg;       /**< = cos(SpotCutoff) */
 645    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 646    GLfloat ConstantAttenuation;
 647    GLfloat LinearAttenuation;
 648    GLfloat QuadraticAttenuation;
 649    GLboolean Enabled;           /**< On/off flag */
 650
 651    /**
 652     * \name Derived fields
 653     */
 654    /*@{*/
 655    GLbitfield _Flags;           /**< State */
 656
 657    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 658    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 659    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 660    GLfloat _NormSpotDirection[4]; /**< normalized spotlight direction */
 661    GLfloat _VP_inf_spot_attenuation;
 662
 663    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 664    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 665    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 666    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 667    GLfloat _dli;                /**< CI diffuse light intensity */
 668    GLfloat _sli;                /**< CI specular light intensity */
 669    /*@}*/
 670 };
 671
 672
 673 /**
 674  * Light model state.
 675  */
 676 struct gl_lightmodel
 677 {
 678    GLfloat Ambient[4];          /**< ambient color */
 679    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 680    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 681    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 682                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 683 };
 684
 685
 686 /**
 687  * Material state.
 688  */
 689 struct gl_material
 690 {
 691    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 692 };
 693
 694
 695 /**
 696  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 697  */
 698 struct gl_accum_attrib
 699 {
 700    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 701 };
 702
 703
 704 /**
 705  * Used for storing clear color, texture border color, etc.
 706  * The float values are typically unclamped.
 707  */
 708 union gl_color_union
 709 {
 710    GLfloat f[4];
 711    GLint i[4];
 712    GLuint ui[4];
 713 };
 714
 715
 716 /**
 717  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 718  */
 719 struct gl_colorbuffer_attrib
 720 {
 721    GLuint ClearIndex;                      /**< Index for glClear */
 722    union gl_color_union ClearColor;        /**< Color for glClear, unclamped */
 723    GLuint IndexMask;                       /**< Color index write mask */
 724    GLubyte ColorMask[MAX_DRAW_BUFFERS][4]; /**< Each flag is 0xff or 0x0 */
 725
 726    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 727
 728    /**
 729     * \name alpha testing
 730     */
 731    /*@{*/
 732    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 733    GLenum AlphaFunc;                    /**< Alpha test function */
 734    GLfloat AlphaRefUnclamped;
 735    GLclampf AlphaRef;                   /**< Alpha reference value */
 736    /*@}*/
 737
 738    /**
 739     * \name Blending
 740     */
 741    /*@{*/
 742    GLbitfield BlendEnabled;             /**< Per-buffer blend enable flags */
 743
 744    /* NOTE: this does _not_ depend on fragment clamping or any other clamping
 745     * control, only on the fixed-pointness of the render target.
 746     * The query does however depend on fragment color clamping.
 747     */
 748    GLfloat BlendColorUnclamped[4];               /**< Blending color */
 749    GLfloat BlendColor[4];               /**< Blending color */
 750
 751    struct
 752    {
 753       GLenum SrcRGB;             /**< RGB blend source term */
 754       GLenum DstRGB;             /**< RGB blend dest term */
 755       GLenum SrcA;               /**< Alpha blend source term */
 756       GLenum DstA;               /**< Alpha blend dest term */
 757       GLenum EquationRGB;        /**< GL_ADD, GL_SUBTRACT, etc. */
 758       GLenum EquationA;          /**< GL_ADD, GL_SUBTRACT, etc. */
 759    } Blend[MAX_DRAW_BUFFERS];
 760    /** Are the blend func terms currently different for each buffer/target? */
 761    GLboolean _BlendFuncPerBuffer;
 762    /** Are the blend equations currently different for each buffer/target? */
 763    GLboolean _BlendEquationPerBuffer;
 764    /*@}*/
 765
 766    /**
 767     * \name Logic op
 768     */
 769    /*@{*/
 770    GLenum LogicOp;                      /**< Logic operator */
 771    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 772    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 773    /*@}*/
 774
 775    GLboolean DitherFlag;                /**< Dither enable flag */
 776
 777    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 778    GLboolean _ClampFragmentColor; /** < with GL_FIXED_ONLY_ARB resolved */
 779    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 780    GLboolean _ClampReadColor;     /** < with GL_FIXED_ONLY_ARB resolved */
 781
 782    GLboolean sRGBEnabled;       /**< Framebuffer sRGB blending/updating requested */
 783 };
 784
 785
 786 /**
 787  * Current attribute group (GL_CURRENT_BIT).
 788  */
 789 struct gl_current_attrib
 790 {
 791    /**
 792     * \name Current vertex attributes.
 793     * \note Values are valid only after FLUSH_VERTICES has been called.
 794     * \note Index and Edgeflag current values are stored as floats in the
 795     * SIX and SEVEN attribute slots.
 796     */
 797    GLfloat Attrib[VERT_ATTRIB_MAX][4];  /**< Position, color, texcoords, etc */
 798
 799    /**
 800     * \name Current raster position attributes (always valid).
 801     * \note This set of attributes is very similar to the SWvertex struct.
 802     */
 803    /*@{*/
 804    GLfloat RasterPos[4];
 805    GLfloat RasterDistance;
 806    GLfloat RasterColor[4];
 807    GLfloat RasterSecondaryColor[4];
 808    GLfloat RasterTexCoords[MAX_TEXTURE_COORD_UNITS][4];
 809    GLboolean RasterPosValid;
 810    /*@}*/
 811 };
 812
 813
 814 /**
 815  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 816  */
 817 struct gl_depthbuffer_attrib
 818 {
 819    GLenum Func;                 /**< Function for depth buffer compare */
 820    GLclampd Clear;              /**< Value to clear depth buffer to */
 821    GLboolean Test;              /**< Depth buffering enabled flag */
 822    GLboolean Mask;              /**< Depth buffer writable? */
 823    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 824    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 825 };
 826
 827
 828 /**
 829  * Evaluator attribute group (GL_EVAL_BIT).
 830  */
 831 struct gl_eval_attrib
 832 {
 833    /**
 834     * \name Enable bits
 835     */
 836    /*@{*/
 837    GLboolean Map1Color4;
 838    GLboolean Map1Index;
 839    GLboolean Map1Normal;
 840    GLboolean Map1TextureCoord1;
 841    GLboolean Map1TextureCoord2;
 842    GLboolean Map1TextureCoord3;
 843    GLboolean Map1TextureCoord4;
 844    GLboolean Map1Vertex3;
 845    GLboolean Map1Vertex4;
 846    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 847    GLboolean Map2Color4;
 848    GLboolean Map2Index;
 849    GLboolean Map2Normal;
 850    GLboolean Map2TextureCoord1;
 851    GLboolean Map2TextureCoord2;
 852    GLboolean Map2TextureCoord3;
 853    GLboolean Map2TextureCoord4;
 854    GLboolean Map2Vertex3;
 855    GLboolean Map2Vertex4;
 856    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 857    GLboolean AutoNormal;
 858    /*@}*/
 859
 860    /**
 861     * \name Map Grid endpoints and divisions and calculated du values
 862     */
 863    /*@{*/
 864    GLint MapGrid1un;
 865    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 866    GLint MapGrid2un, MapGrid2vn;
 867    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 868    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 869    /*@}*/
 870 };
 871
 872
 873 /**
 874  * Fog attribute group (GL_FOG_BIT).
 875  */
 876 struct gl_fog_attrib
 877 {
 878    GLboolean Enabled;           /**< Fog enabled flag */
 879    GLfloat ColorUnclamped[4];            /**< Fog color */
 880    GLfloat Color[4];            /**< Fog color */
 881    GLfloat Density;             /**< Density >= 0.0 */
 882    GLfloat Start;               /**< Start distance in eye coords */
 883    GLfloat End;                 /**< End distance in eye coords */
 884    GLfloat Index;               /**< Fog index */
 885    GLenum Mode;                 /**< Fog mode */
 886    GLboolean ColorSumEnabled;
 887    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 888    GLfloat _Scale;              /**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
 889 };
 890
 891
 892 /**
 893  * \brief Layout qualifiers for gl_FragDepth.
 894  *
 895  * Extension AMD_conservative_depth allows gl_FragDepth to be redeclared with
 896  * a layout qualifier.
 897  *
 898  * \see enum ir_depth_layout
 899  */
 900 enum gl_frag_depth_layout {
 901     FRAG_DEPTH_LAYOUT_NONE, /**< No layout is specified. */
 902     FRAG_DEPTH_LAYOUT_ANY,
 903     FRAG_DEPTH_LAYOUT_GREATER,
 904     FRAG_DEPTH_LAYOUT_LESS,
 905     FRAG_DEPTH_LAYOUT_UNCHANGED
 906 };
 907
 908
 909 /**
 910  * Hint attribute group (GL_HINT_BIT).
 911  *
 912  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 913  */
 914 struct gl_hint_attrib
 915 {
 916    GLenum PerspectiveCorrection;
 917    GLenum PointSmooth;
 918    GLenum LineSmooth;
 919    GLenum PolygonSmooth;
 920    GLenum Fog;
 921    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 922    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 923    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 924    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 925 };
 926
 927 /**
 928  * Light state flags.
 929  */
 930 /*@{*/
 931 #define LIGHT_SPOT         0x1
 932 #define LIGHT_LOCAL_VIEWER 0x2
 933 #define LIGHT_POSITIONAL   0x4
 934 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 935 /*@}*/
 936
 937
 938 /**
 939  * Lighting attribute group (GL_LIGHT_BIT).
 940  */
 941 struct gl_light_attrib
 942 {
 943    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 944    struct gl_lightmodel Model;          /**< Lighting model */
 945
 946    /**
 947     * Must flush FLUSH_VERTICES before referencing:
 948     */
 949    /*@{*/
 950    struct gl_material Material;         /**< Includes front & back values */
 951    /*@}*/
 952
 953    GLboolean Enabled;                   /**< Lighting enabled flag */
 954    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 955    GLenum ProvokingVertex;              /**< GL_EXT_provoking_vertex */
 956    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 957    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 958    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 959    GLboolean ColorMaterialEnabled;
 960    GLenum ClampVertexColor;
 961    GLboolean _ClampVertexColor;
 962
 963    struct gl_light EnabledList;         /**< List sentinel */
 964
 965    /**
 966     * Derived state for optimizations:
 967     */
 968    /*@{*/
 969    GLboolean _NeedEyeCoords;
 970    GLboolean _NeedVertices;             /**< Use fast shader? */
 971    GLbitfield _Flags;                   /**< LIGHT_* flags, see above */
 972    GLfloat _BaseColor[2][3];
 973    /*@}*/
 974 };
 975
 976
 977 /**
 978  * Line attribute group (GL_LINE_BIT).
 979  */
 980 struct gl_line_attrib
 981 {
 982    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 983    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 984    GLushort StipplePattern;     /**< Stipple pattern */
 985    GLint StippleFactor;         /**< Stipple repeat factor */
 986    GLfloat Width;               /**< Line width */
 987 };
 988
 989
 990 /**
 991  * Display list attribute group (GL_LIST_BIT).
 992  */
 993 struct gl_list_attrib
 994 {
 995    GLuint ListBase;
 996 };
 997
 998
 999 /**
1000  * Multisample attribute group (GL_MULTISAMPLE_BIT).
1001  */
1002 struct gl_multisample_attrib
1003 {
1004    GLboolean Enabled;
1005    GLboolean _Enabled;   /**< true if Enabled and multisample buffer */
1006    GLboolean SampleAlphaToCoverage;
1007    GLboolean SampleAlphaToOne;
1008    GLboolean SampleCoverage;
1009    GLfloat SampleCoverageValue;
1010    GLboolean SampleCoverageInvert;
1011 };
1012
1013
1014 /**
1015  * A pixelmap (see glPixelMap)
1016  */
1017 struct gl_pixelmap
1018 {
1019    GLint Size;
1020    GLfloat Map[MAX_PIXEL_MAP_TABLE];
1021    GLubyte Map8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
1022 };
1023
1024
1025 /**
1026  * Collection of all pixelmaps
1027  */
1028 struct gl_pixelmaps
1029 {
1030    struct gl_pixelmap RtoR;  /**< i.e. GL_PIXEL_MAP_R_TO_R */
1031    struct gl_pixelmap GtoG;
1032    struct gl_pixelmap BtoB;
1033    struct gl_pixelmap AtoA;
1034    struct gl_pixelmap ItoR;
1035    struct gl_pixelmap ItoG;
1036    struct gl_pixelmap ItoB;
1037    struct gl_pixelmap ItoA;
1038    struct gl_pixelmap ItoI;
1039    struct gl_pixelmap StoS;
1040 };
1041
1042
1043 /**
1044  * Pixel attribute group (GL_PIXEL_MODE_BIT).
1045  */
1046 struct gl_pixel_attrib
1047 {
1048    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
1049
1050    /*--- Begin Pixel Transfer State ---*/
1051    /* Fields are in the order in which they're applied... */
1052
1053    /** Scale & Bias (index shift, offset) */
1054    /*@{*/
1055    GLfloat RedBias, RedScale;
1056    GLfloat GreenBias, GreenScale;
1057    GLfloat BlueBias, BlueScale;
1058    GLfloat AlphaBias, AlphaScale;
1059    GLfloat DepthBias, DepthScale;
1060    GLint IndexShift, IndexOffset;
1061    /*@}*/
1062
1063    /* Pixel Maps */
1064    /* Note: actual pixel maps are not part of this attrib group */
1065    GLboolean MapColorFlag;
1066    GLboolean MapStencilFlag;
1067
1068    /*--- End Pixel Transfer State ---*/
1069
1070    /** glPixelZoom */
1071    GLfloat ZoomX, ZoomY;
1072 };
1073
1074
1075 /**
1076  * Point attribute group (GL_POINT_BIT).
1077  */
1078 struct gl_point_attrib
1079 {
1080    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1081    GLfloat Size;                /**< User-specified point size */
1082    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1083    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1084    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1085    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1086    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
1087    GLboolean CoordReplace[MAX_TEXTURE_COORD_UNITS]; /**< GL_ARB_point_sprite*/
1088    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1089    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1090 };
1091
1092
1093 /**
1094  * Polygon attribute group (GL_POLYGON_BIT).
1095  */
1096 struct gl_polygon_attrib
1097 {
1098    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1099    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1100    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1101    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1102    GLboolean CullFlag;          /**< Culling on/off flag */
1103    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1104    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1105    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1106    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1107    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1108    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1109    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1110    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1111 };
1112
1113
1114 /**
1115  * Scissor attributes (GL_SCISSOR_BIT).
1116  */
1117 struct gl_scissor_attrib
1118 {
1119    GLboolean Enabled;           /**< Scissor test enabled? */
1120    GLint X, Y;                  /**< Lower left corner of box */
1121    GLsizei Width, Height;       /**< Size of box */
1122 };
1123
1124
1125 /**
1126  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1127  *
1128  * Three sets of stencil data are tracked so that OpenGL 2.0,
1129  * GL_EXT_stencil_two_side, and GL_ATI_separate_stencil can all be supported
1130  * simultaneously.  In each of the stencil state arrays, element 0 corresponds
1131  * to GL_FRONT.  Element 1 corresponds to the OpenGL 2.0 /
1132  * GL_ATI_separate_stencil GL_BACK state.  Element 2 corresponds to the
1133  * GL_EXT_stencil_two_side GL_BACK state.
1134  *
1135  * The derived value \c _BackFace is either 1 or 2 depending on whether or
1136  * not GL_STENCIL_TEST_TWO_SIDE_EXT is enabled.
1137  *
1138  * The derived value \c _TestTwoSide is set when the front-face and back-face
1139  * stencil state are different.
1140  */
1141 struct gl_stencil_attrib
1142 {
1143    GLboolean Enabled;           /**< Enabled flag */
1144    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1145    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 2) */
1146    GLboolean _Enabled;          /**< Enabled and stencil buffer present */
1147    GLboolean _TestTwoSide;
1148    GLubyte _BackFace;           /**< Current back stencil state (1 or 2) */
1149    GLenum Function[3];          /**< Stencil function */
1150    GLenum FailFunc[3];          /**< Fail function */
1151    GLenum ZPassFunc[3];         /**< Depth buffer pass function */
1152    GLenum ZFailFunc[3];         /**< Depth buffer fail function */
1153    GLint Ref[3];                /**< Reference value */
1154    GLuint ValueMask[3];         /**< Value mask */
1155    GLuint WriteMask[3];         /**< Write mask */
1156    GLuint Clear;                /**< Clear value */
1157 };
1158
1159
1160 /**
1161  * An index for each type of texture object.  These correspond to the GL
1162  * texture target enums, such as GL_TEXTURE_2D, GL_TEXTURE_CUBE_MAP, etc.
1163  * Note: the order is from highest priority to lowest priority.
1164  */
1165 typedef enum
1166 {
1167    TEXTURE_BUFFER_INDEX,
1168    TEXTURE_2D_ARRAY_INDEX,
1169    TEXTURE_1D_ARRAY_INDEX,
1170    TEXTURE_CUBE_INDEX,
1171    TEXTURE_3D_INDEX,
1172    TEXTURE_RECT_INDEX,
1173    TEXTURE_2D_INDEX,
1174    TEXTURE_1D_INDEX,
1175    NUM_TEXTURE_TARGETS
1176 } gl_texture_index;
1177
1178
1179 /**
1180  * Bit flags for each type of texture object
1181  * Used for Texture.Unit[]._ReallyEnabled flags.
1182  */
1183 /*@{*/
1184 #define TEXTURE_BUFFER_BIT   (1 << TEXTURE_BUFFER_INDEX)
1185 #define TEXTURE_2D_ARRAY_BIT (1 << TEXTURE_2D_ARRAY_INDEX)
1186 #define TEXTURE_1D_ARRAY_BIT (1 << TEXTURE_1D_ARRAY_INDEX)
1187 #define TEXTURE_CUBE_BIT     (1 << TEXTURE_CUBE_INDEX)
1188 #define TEXTURE_3D_BIT       (1 << TEXTURE_3D_INDEX)
1189 #define TEXTURE_RECT_BIT     (1 << TEXTURE_RECT_INDEX)
1190 #define TEXTURE_2D_BIT       (1 << TEXTURE_2D_INDEX)
1191 #define TEXTURE_1D_BIT       (1 << TEXTURE_1D_INDEX)
1192 /*@}*/
1193
1194
1195 /**
1196  * TexGenEnabled flags.
1197  */
1198 /*@{*/
1199 #define S_BIT 1
1200 #define T_BIT 2
1201 #define R_BIT 4
1202 #define Q_BIT 8
1203 #define STR_BITS (S_BIT | T_BIT | R_BIT)
1204 /*@}*/
1205
1206
1207 /**
1208  * Bit flag versions of the corresponding GL_ constants.
1209  */
1210 /*@{*/
1211 #define TEXGEN_SPHERE_MAP        0x1
1212 #define TEXGEN_OBJ_LINEAR        0x2
1213 #define TEXGEN_EYE_LINEAR        0x4
1214 #define TEXGEN_REFLECTION_MAP_NV 0x8
1215 #define TEXGEN_NORMAL_MAP_NV     0x10
1216
1217 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1218                                   TEXGEN_REFLECTION_MAP_NV | \
1219                                   TEXGEN_NORMAL_MAP_NV)
1220 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1221                                   TEXGEN_REFLECTION_MAP_NV | \
1222                                   TEXGEN_NORMAL_MAP_NV     | \
1223                                   TEXGEN_EYE_LINEAR)
1224 /*@}*/
1225
1226
1227
1228 /** Tex-gen enabled for texture unit? */
1229 #define ENABLE_TEXGEN(unit) (1 << (unit))
1230
1231 /** Non-identity texture matrix for texture unit? */
1232 #define ENABLE_TEXMAT(unit) (1 << (unit))
1233
1234
1235 /**
1236  * Texture image state.  Describes the dimensions of a texture image,
1237  * the texel format and pointers to Texel Fetch functions.
1238  */
1239 struct gl_texture_image
1240 {
1241    GLint InternalFormat;        /**< Internal format as given by the user */
1242    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1243                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1244                                  *   GL_INTENSITY, GL_DEPTH_COMPONENT or
1245                                  *   GL_DEPTH_STENCIL_EXT only. Used for
1246                                  *   choosing TexEnv arithmetic.
1247                                  */
1248    gl_format TexFormat;         /**< The actual texture memory format */
1249
1250    GLuint Border;               /**< 0 or 1 */
1251    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1252    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1253    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1254    GLuint Width2;               /**< = Width - 2*Border */
1255    GLuint Height2;              /**< = Height - 2*Border */
1256    GLuint Depth2;               /**< = Depth - 2*Border */
1257    GLuint WidthLog2;            /**< = log2(Width2) */
1258    GLuint HeightLog2;           /**< = log2(Height2) */
1259    GLuint DepthLog2;            /**< = log2(Depth2) */
1260    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1261
1262    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1263    GLuint Level;                /**< Which mipmap level am I? */
1264    /** Cube map face: index into gl_texture_object::Image[] array */
1265    GLuint Face;
1266
1267    GLuint RowStride;            /**< Padded width in units of texels */
1268    GLuint *ImageOffsets;        /**< if 3D texture: array [Depth] of offsets to
1269                                      each 2D slice in 'Data', in texels */
1270    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1271
1272    /**
1273     * \name For device driver:
1274     */
1275    /*@{*/
1276    void *DriverData;            /**< Arbitrary device driver data */
1277    /*@}*/
1278 };
1279
1280
1281 /**
1282  * Indexes for cube map faces.
1283  */
1284 typedef enum
1285 {
1286    FACE_POS_X = 0,
1287    FACE_NEG_X = 1,
1288    FACE_POS_Y = 2,
1289    FACE_NEG_Y = 3,
1290    FACE_POS_Z = 4,
1291    FACE_NEG_Z = 5,
1292    MAX_FACES = 6
1293 } gl_face_index;
1294
1295
1296 /**
1297  * Sampler object state.  These objects are new with GL_ARB_sampler_objects
1298  * and OpenGL 3.3.  Legacy texture objects also contain a sampler object.
1299  */
1300 struct gl_sampler_object
1301 {
1302    GLuint Name;
1303    GLint RefCount;
1304
1305    GLenum WrapS;                /**< S-axis texture image wrap mode */
1306    GLenum WrapT;                /**< T-axis texture image wrap mode */
1307    GLenum WrapR;                /**< R-axis texture image wrap mode */
1308    GLenum MinFilter;            /**< minification filter */
1309    GLenum MagFilter;            /**< magnification filter */
1310    union gl_color_union BorderColor;  /**< Interpreted according to texture format */
1311    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1312    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1313    GLfloat LodBias;             /**< OpenGL 1.4 */
1314    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1315    GLenum CompareMode;          /**< GL_ARB_shadow */
1316    GLenum CompareFunc;          /**< GL_ARB_shadow */
1317    GLfloat CompareFailValue;    /**< GL_ARB_shadow_ambient */
1318    GLenum sRGBDecode;           /**< GL_DECODE_EXT or GL_SKIP_DECODE_EXT */
1319    GLboolean CubeMapSeamless;   /**< GL_AMD_seamless_cubemap_per_texture */
1320
1321    /* deprecated sampler state */
1322    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1323
1324    /** Is the texture object complete with respect to this sampler? */
1325    GLboolean _CompleteTexture;
1326 };
1327
1328
1329 /**
1330  * Texture object state.  Contains the array of mipmap images, border color,
1331  * wrap modes, filter modes, and shadow/texcompare state.
1332  */
1333 struct gl_texture_object
1334 {
1335    _glthread_Mutex Mutex;       /**< for thread safety */
1336    GLint RefCount;              /**< reference count */
1337    GLuint Name;                 /**< the user-visible texture object ID */
1338    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1339
1340    struct gl_sampler_object Sampler;
1341
1342    GLfloat Priority;            /**< in [0,1] */
1343    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1344    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1345    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1346    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1347    GLint CropRect[4];           /**< GL_OES_draw_texture */
1348    GLenum Swizzle[4];           /**< GL_EXT_texture_swizzle */
1349    GLuint _Swizzle;             /**< same as Swizzle, but SWIZZLE_* format */
1350    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1351    GLboolean _Complete;         /**< Is texture object complete? */
1352    GLboolean _RenderToTexture;  /**< Any rendering to this texture? */
1353    GLboolean Purgeable;         /**< Is the buffer purgeable under memory pressure? */
1354
1355    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1356    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1357
1358    /** GL_ARB_texture_buffer_object */
1359    struct gl_buffer_object *BufferObject;
1360    GLenum BufferObjectFormat;
1361
1362    /**
1363     * \name For device driver.
1364     * Note: instead of attaching driver data to this pointer, it's preferable
1365     * to instead use this struct as a base class for your own texture object
1366     * class.  Driver->NewTextureObject() can be used to implement the
1367     * allocation.
1368     */
1369    void *DriverData;    /**< Arbitrary device driver data */
1370 };
1371
1372
1373 /** Up to four combiner sources are possible with GL_NV_texture_env_combine4 */
1374 #define MAX_COMBINER_TERMS 4
1375
1376
1377 /**
1378  * Texture combine environment state.
1379  */
1380 struct gl_tex_env_combine_state
1381 {
1382    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1383    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1384    /** Source terms: GL_PRIMARY_COLOR, GL_TEXTURE, etc */
1385    GLenum SourceRGB[MAX_COMBINER_TERMS];
1386    GLenum SourceA[MAX_COMBINER_TERMS];
1387    /** Source operands: GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR, etc */
1388    GLenum OperandRGB[MAX_COMBINER_TERMS];
1389    GLenum OperandA[MAX_COMBINER_TERMS];
1390    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1391    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1392    GLuint _NumArgsRGB;   /**< Number of inputs used for the RGB combiner */
1393    GLuint _NumArgsA;     /**< Number of inputs used for the A combiner */
1394 };
1395
1396
1397 /**
1398  * Texture coord generation state.
1399  */
1400 struct gl_texgen
1401 {
1402    GLenum Mode;         /**< GL_EYE_LINEAR, GL_SPHERE_MAP, etc */
1403    GLbitfield _ModeBit; /**< TEXGEN_x bit corresponding to Mode */
1404    GLfloat ObjectPlane[4];
1405    GLfloat EyePlane[4];
1406 };
1407
1408
1409 /**
1410  * Texture unit state.  Contains enable flags, texture environment/function/
1411  * combiners, texgen state, and pointers to current texture objects.
1412  */
1413 struct gl_texture_unit
1414 {
1415    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1416    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1417
1418    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1419    GLclampf EnvColor[4];
1420    GLfloat EnvColorUnclamped[4];
1421
1422    struct gl_texgen GenS;
1423    struct gl_texgen GenT;
1424    struct gl_texgen GenR;
1425    struct gl_texgen GenQ;
1426    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1427    GLbitfield _GenFlags;        /**< Bitwise-OR of Gen[STRQ]._ModeBit */
1428
1429    GLfloat LodBias;             /**< for biasing mipmap levels */
1430    GLenum BumpTarget;
1431    GLfloat RotMatrix[4]; /* 2x2 matrix */
1432
1433    /** Current sampler object (GL_ARB_sampler_objects) */
1434    struct gl_sampler_object *Sampler;
1435
1436    /**
1437     * \name GL_EXT_texture_env_combine
1438     */
1439    struct gl_tex_env_combine_state Combine;
1440
1441    /**
1442     * Derived state based on \c EnvMode and the \c BaseFormat of the
1443     * currently enabled texture.
1444     */
1445    struct gl_tex_env_combine_state _EnvMode;
1446
1447    /**
1448     * Currently enabled combiner state.  This will point to either
1449     * \c Combine or \c _EnvMode.
1450     */
1451    struct gl_tex_env_combine_state *_CurrentCombine;
1452
1453    /** Current texture object pointers */
1454    struct gl_texture_object *CurrentTex[NUM_TEXTURE_TARGETS];
1455
1456    /** Points to highest priority, complete and enabled texture object */
1457    struct gl_texture_object *_Current;
1458 };
1459
1460
1461 /**
1462  * Texture attribute group (GL_TEXTURE_BIT).
1463  */
1464 struct gl_texture_attrib
1465 {
1466    GLuint CurrentUnit;   /**< GL_ACTIVE_TEXTURE */
1467    struct gl_texture_unit Unit[MAX_COMBINED_TEXTURE_IMAGE_UNITS];
1468
1469    struct gl_texture_object *ProxyTex[NUM_TEXTURE_TARGETS];
1470
1471    /** GL_ARB_texture_buffer_object */
1472    struct gl_buffer_object *BufferObject;
1473
1474    /** GL_ARB_seamless_cubemap */
1475    GLboolean CubeMapSeamless;
1476
1477    /** Texture units/samplers used by vertex or fragment texturing */
1478    GLbitfield _EnabledUnits;
1479
1480    /** Texture coord units/sets used for fragment texturing */
1481    GLbitfield _EnabledCoordUnits;
1482
1483    /** Texture coord units that have texgen enabled */
1484    GLbitfield _TexGenEnabled;
1485
1486    /** Texture coord units that have non-identity matrices */
1487    GLbitfield _TexMatEnabled;
1488
1489    /** Bitwise-OR of all Texture.Unit[i]._GenFlags */
1490    GLbitfield _GenFlags;
1491 };
1492
1493
1494 /**
1495  * Transformation attribute group (GL_TRANSFORM_BIT).
1496  */
1497 struct gl_transform_attrib
1498 {
1499    GLenum MatrixMode;                           /**< Matrix mode */
1500    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1501    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1502    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1503    GLboolean Normalize;                         /**< Normalize all normals? */
1504    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1505    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1506    GLboolean DepthClamp;                        /**< GL_ARB_depth_clamp */
1507
1508    GLfloat CullEyePos[4];
1509    GLfloat CullObjPos[4];
1510 };
1511
1512
1513 /**
1514  * Viewport attribute group (GL_VIEWPORT_BIT).
1515  */
1516 struct gl_viewport_attrib
1517 {
1518    GLint X, Y;                  /**< position */
1519    GLsizei Width, Height;       /**< size */
1520    GLfloat Near, Far;           /**< Depth buffer range */
1521    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1522 };
1523
1524
1525 /**
1526  * GL_ARB_vertex/pixel_buffer_object buffer object
1527  */
1528 struct gl_buffer_object
1529 {
1530    _glthread_Mutex Mutex;
1531    GLint RefCount;
1532    GLuint Name;
1533    GLenum Usage;        /**< GL_STREAM_DRAW_ARB, GL_STREAM_READ_ARB, etc. */
1534    GLsizeiptrARB Size;  /**< Size of buffer storage in bytes */
1535    GLubyte *Data;       /**< Location of storage either in RAM or VRAM. */
1536    /** Fields describing a mapped buffer */
1537    /*@{*/
1538    GLbitfield AccessFlags; /**< Mask of GL_MAP_x_BIT flags */
1539    GLvoid *Pointer;     /**< User-space address of mapping */
1540    GLintptr Offset;     /**< Mapped offset */
1541    GLsizeiptr Length;   /**< Mapped length */
1542    /*@}*/
1543    GLboolean Written;   /**< Ever written to? (for debugging) */
1544    GLboolean Purgeable; /**< Is the buffer purgeable under memory pressure? */
1545 };
1546
1547
1548 /**
1549  * Client pixel packing/unpacking attributes
1550  */
1551 struct gl_pixelstore_attrib
1552 {
1553    GLint Alignment;
1554    GLint RowLength;
1555    GLint SkipPixels;
1556    GLint SkipRows;
1557    GLint ImageHeight;
1558    GLint SkipImages;
1559    GLboolean SwapBytes;
1560    GLboolean LsbFirst;
1561    GLboolean Invert;        /**< GL_MESA_pack_invert */
1562    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1563 };
1564
1565
1566 /**
1567  * Client vertex array attributes
1568  */
1569 struct gl_client_array
1570 {
1571    GLint Size;                  /**< components per element (1,2,3,4) */
1572    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1573    GLenum Format;               /**< default: GL_RGBA, but may be GL_BGRA */
1574    GLsizei Stride;              /**< user-specified stride */
1575    GLsizei StrideB;             /**< actual stride in bytes */
1576    const GLubyte *Ptr;          /**< Points to array data */
1577    GLboolean Enabled;           /**< Enabled flag is a boolean */
1578    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1579    GLboolean Integer;           /**< Integer-valued? */
1580    GLuint InstanceDivisor;      /**< GL_ARB_instanced_arrays */
1581    GLuint _ElementSize;         /**< size of each element in bytes */
1582
1583    struct gl_buffer_object *BufferObj;/**< GL_ARB_vertex_buffer_object */
1584    GLuint _MaxElement;          /**< max element index into array buffer + 1 */
1585 };
1586
1587
1588 /**
1589  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1590  * extension, but a nice encapsulation in any case.
1591  */
1592 struct gl_array_object
1593 {
1594    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1595    GLuint Name;
1596
1597    GLint RefCount;
1598    _glthread_Mutex Mutex;
1599    GLboolean VBOonly;  /**< require all arrays to live in VBOs? */
1600
1601    /** Conventional vertex arrays */
1602    /*@{*/
1603    struct gl_client_array Vertex;
1604    struct gl_client_array Weight;
1605    struct gl_client_array Normal;
1606    struct gl_client_array Color;
1607    struct gl_client_array SecondaryColor;
1608    struct gl_client_array FogCoord;
1609    struct gl_client_array Index;
1610    struct gl_client_array EdgeFlag;
1611    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1612    struct gl_client_array PointSize;
1613    /*@}*/
1614
1615    /**
1616     * Generic arrays for vertex programs/shaders.
1617     * For NV vertex programs, these attributes alias and take priority
1618     * over the conventional attribs above.  For ARB vertex programs and
1619     * GLSL vertex shaders, these attributes are separate.
1620     */
1621    struct gl_client_array VertexAttrib[MAX_VERTEX_GENERIC_ATTRIBS];
1622
1623    /** Mask of _NEW_ARRAY_* values indicating which arrays are enabled */
1624    GLbitfield _Enabled;
1625
1626    /**
1627     * Min of all enabled arrays' _MaxElement.  When arrays reside inside VBOs
1628     * we can determine the max legal (in bounds) glDrawElements array index.
1629     */
1630    GLuint _MaxElement;
1631 };
1632
1633
1634 /**
1635  * Vertex array state
1636  */
1637 struct gl_array_attrib
1638 {
1639    /** Currently bound array object. See _mesa_BindVertexArrayAPPLE() */
1640    struct gl_array_object *ArrayObj;
1641
1642    /** The default vertex array object */
1643    struct gl_array_object *DefaultArrayObj;
1644
1645    /** Array objects (GL_ARB/APPLE_vertex_array_object) */
1646    struct _mesa_HashTable *Objects;
1647
1648    GLint ActiveTexture;         /**< Client Active Texture */
1649    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1650    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1651
1652    /** GL 3.1 (slightly different from GL_NV_primitive_restart) */
1653    GLboolean PrimitiveRestart;
1654    GLuint RestartIndex;
1655
1656    GLbitfield NewState;         /**< mask of _NEW_ARRAY_* values */
1657    GLboolean RebindArrays; /**< whether the VBO module should rebind arrays */
1658
1659    /* GL_ARB_vertex_buffer_object */
1660    struct gl_buffer_object *ArrayBufferObj;
1661    struct gl_buffer_object *ElementArrayBufferObj;
1662 };
1663
1664
1665 /**
1666  * Feedback buffer state
1667  */
1668 struct gl_feedback
1669 {
1670    GLenum Type;
1671    GLbitfield _Mask;    /**< FB_* bits */
1672    GLfloat *Buffer;
1673    GLuint BufferSize;
1674    GLuint Count;
1675 };
1676
1677
1678 /**
1679  * Selection buffer state
1680  */
1681 struct gl_selection
1682 {
1683    GLuint *Buffer;      /**< selection buffer */
1684    GLuint BufferSize;   /**< size of the selection buffer */
1685    GLuint BufferCount;  /**< number of values in the selection buffer */
1686    GLuint Hits;         /**< number of records in the selection buffer */
1687    GLuint NameStackDepth; /**< name stack depth */
1688    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1689    GLboolean HitFlag;   /**< hit flag */
1690    GLfloat HitMinZ;     /**< minimum hit depth */
1691    GLfloat HitMaxZ;     /**< maximum hit depth */
1692 };
1693
1694
1695 /**
1696  * 1-D Evaluator control points
1697  */
1698 struct gl_1d_map
1699 {
1700    GLuint Order;        /**< Number of control points */
1701    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1702    GLfloat *Points;     /**< Points to contiguous control points */
1703 };
1704
1705
1706 /**
1707  * 2-D Evaluator control points
1708  */
1709 struct gl_2d_map
1710 {
1711    GLuint Uorder;               /**< Number of control points in U dimension */
1712    GLuint Vorder;               /**< Number of control points in V dimension */
1713    GLfloat u1, u2, du;
1714    GLfloat v1, v2, dv;
1715    GLfloat *Points;             /**< Points to contiguous control points */
1716 };
1717
1718
1719 /**
1720  * All evaluator control point state
1721  */
1722 struct gl_evaluators
1723 {
1724    /**
1725     * \name 1-D maps
1726     */
1727    /*@{*/
1728    struct gl_1d_map Map1Vertex3;
1729    struct gl_1d_map Map1Vertex4;
1730    struct gl_1d_map Map1Index;
1731    struct gl_1d_map Map1Color4;
1732    struct gl_1d_map Map1Normal;
1733    struct gl_1d_map Map1Texture1;
1734    struct gl_1d_map Map1Texture2;
1735    struct gl_1d_map Map1Texture3;
1736    struct gl_1d_map Map1Texture4;
1737    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1738    /*@}*/
1739
1740    /**
1741     * \name 2-D maps
1742     */
1743    /*@{*/
1744    struct gl_2d_map Map2Vertex3;
1745    struct gl_2d_map Map2Vertex4;
1746    struct gl_2d_map Map2Index;
1747    struct gl_2d_map Map2Color4;
1748    struct gl_2d_map Map2Normal;
1749    struct gl_2d_map Map2Texture1;
1750    struct gl_2d_map Map2Texture2;
1751    struct gl_2d_map Map2Texture3;
1752    struct gl_2d_map Map2Texture4;
1753    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1754    /*@}*/
1755 };
1756
1757
1758 /**
1759  * Names of the various vertex/fragment program register files, etc.
1760  *
1761  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1762  * All values should fit in a 4-bit field.
1763  *
1764  * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
1765  * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
1766  * be "uniform" variables since they can only be set outside glBegin/End.
1767  * They're also all stored in the same Parameters array.
1768  */
1769 typedef enum
1770 {
1771    PROGRAM_TEMPORARY,   /**< machine->Temporary[] */
1772    PROGRAM_INPUT,       /**< machine->Inputs[] */
1773    PROGRAM_OUTPUT,      /**< machine->Outputs[] */
1774    PROGRAM_VARYING,     /**< machine->Inputs[]/Outputs[] */
1775    PROGRAM_LOCAL_PARAM, /**< gl_program->LocalParams[] */
1776    PROGRAM_ENV_PARAM,   /**< gl_program->Parameters[] */
1777    PROGRAM_STATE_VAR,   /**< gl_program->Parameters[] */
1778    PROGRAM_NAMED_PARAM, /**< gl_program->Parameters[] */
1779    PROGRAM_CONSTANT,    /**< gl_program->Parameters[] */
1780    PROGRAM_UNIFORM,     /**< gl_program->Parameters[] */
1781    PROGRAM_WRITE_ONLY,  /**< A dummy, write-only register */
1782    PROGRAM_ADDRESS,     /**< machine->AddressReg */
1783    PROGRAM_SAMPLER,     /**< for shader samplers, compile-time only */
1784    PROGRAM_SYSTEM_VALUE,/**< InstanceId, PrimitiveID, etc. */
1785    PROGRAM_UNDEFINED,   /**< Invalid/TBD value */
1786    PROGRAM_FILE_MAX
1787 } gl_register_file;
1788
1789
1790 /**
1791  * If the register file is PROGRAM_SYSTEM_VALUE, the register index will be
1792  * one of these values.
1793  */
1794 typedef enum
1795 {
1796    SYSTEM_VALUE_FRONT_FACE,  /**< Fragment shader only (not done yet) */
1797    SYSTEM_VALUE_INSTANCE_ID, /**< Vertex shader only */
1798    SYSTEM_VALUE_MAX          /**< Number of values */
1799 } gl_system_value;
1800
1801
1802 /** Vertex and fragment instructions */
1803 struct prog_instruction;
1804 struct gl_program_parameter_list;
1805 struct gl_uniform_list;
1806
1807
1808 /**
1809  * Base class for any kind of program object
1810  */
1811 struct gl_program
1812 {
1813    GLuint Id;
1814    GLubyte *String;  /**< Null-terminated program text */
1815    GLint RefCount;
1816    GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
1817    GLenum Format;    /**< String encoding format */
1818    GLboolean Resident;
1819
1820    struct prog_instruction *Instructions;
1821
1822    GLbitfield InputsRead;     /**< Bitmask of which input regs are read */
1823    GLbitfield64 OutputsWritten; /**< Bitmask of which output regs are written */
1824    GLbitfield SystemValuesRead;   /**< Bitmask of SYSTEM_VALUE_x inputs used */
1825    GLbitfield InputFlags[MAX_PROGRAM_INPUTS];   /**< PROG_PARAM_BIT_x flags */
1826    GLbitfield OutputFlags[MAX_PROGRAM_OUTPUTS]; /**< PROG_PARAM_BIT_x flags */
1827    GLbitfield TexturesUsed[MAX_COMBINED_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1828    GLbitfield SamplersUsed;   /**< Bitfield of which samplers are used */
1829    GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */
1830
1831
1832    /** Named parameters, constants, etc. from program text */
1833    struct gl_program_parameter_list *Parameters;
1834    /** Numbered local parameters */
1835    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1836
1837    /** Vertex program user-defined attributes */
1838    struct gl_program_parameter_list *Attributes;
1839
1840    /** Map from sampler unit to texture unit (set by glUniform1i()) */
1841    GLubyte SamplerUnits[MAX_SAMPLERS];
1842    /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
1843    gl_texture_index SamplerTargets[MAX_SAMPLERS];
1844
1845    /** Bitmask of which register files are read/written with indirect
1846     * addressing.  Mask of (1 << PROGRAM_x) bits.
1847     */
1848    GLbitfield IndirectRegisterFiles;
1849
1850    /** Logical counts */
1851    /*@{*/
1852    GLuint NumInstructions;
1853    GLuint NumTemporaries;
1854    GLuint NumParameters;
1855    GLuint NumAttributes;
1856    GLuint NumAddressRegs;
1857    GLuint NumAluInstructions;
1858    GLuint NumTexInstructions;
1859    GLuint NumTexIndirections;
1860    /*@}*/
1861    /** Native, actual h/w counts */
1862    /*@{*/
1863    GLuint NumNativeInstructions;
1864    GLuint NumNativeTemporaries;
1865    GLuint NumNativeParameters;
1866    GLuint NumNativeAttributes;
1867    GLuint NumNativeAddressRegs;
1868    GLuint NumNativeAluInstructions;
1869    GLuint NumNativeTexInstructions;
1870    GLuint NumNativeTexIndirections;
1871    /*@}*/
1872 };
1873
1874
1875 /** Vertex program object */
1876 struct gl_vertex_program
1877 {
1878    struct gl_program Base;   /**< base class */
1879    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1880    GLboolean IsPositionInvariant;
1881    GLboolean UsesClipDistance;
1882 };
1883
1884
1885 /** Geometry program object */
1886 struct gl_geometry_program
1887 {
1888    struct gl_program Base;   /**< base class */
1889
1890    GLint VerticesOut;
1891    GLenum InputType;  /**< GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_ARB,
1892                            GL_TRIANGLES, or GL_TRIANGLES_ADJACENCY_ARB */
1893    GLenum OutputType; /**< GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP */
1894 };
1895
1896
1897 /** Fragment program object */
1898 struct gl_fragment_program
1899 {
1900    struct gl_program Base;   /**< base class */
1901    GLboolean UsesKill;          /**< shader uses KIL instruction */
1902    GLboolean OriginUpperLeft;
1903    GLboolean PixelCenterInteger;
1904    enum gl_frag_depth_layout FragDepthLayout;
1905 };
1906
1907
1908 /**
1909  * State common to vertex and fragment programs.
1910  */
1911 struct gl_program_state
1912 {
1913    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1914    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1915 };
1916
1917
1918 /**
1919  * Context state for vertex programs.
1920  */
1921 struct gl_vertex_program_state
1922 {
1923    GLboolean Enabled;            /**< User-set GL_VERTEX_PROGRAM_ARB/NV flag */
1924    GLboolean _Enabled;           /**< Enabled and _valid_ user program? */
1925    GLboolean PointSizeEnabled;   /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1926    GLboolean TwoSideEnabled;     /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1927    /** Computed two sided lighting for fixed function/programs. */
1928    GLboolean _TwoSideEnabled;
1929    struct gl_vertex_program *Current;  /**< User-bound vertex program */
1930
1931    /** Currently enabled and valid vertex program (including internal
1932     * programs, user-defined vertex programs and GLSL vertex shaders).
1933     * This is the program we must use when rendering.
1934     */
1935    struct gl_vertex_program *_Current;
1936
1937    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1938
1939    /* For GL_NV_vertex_program only: */
1940    GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
1941    GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];
1942
1943    /** Should fixed-function T&L be implemented with a vertex prog? */
1944    GLboolean _MaintainTnlProgram;
1945
1946    /** Program to emulate fixed-function T&L (see above) */
1947    struct gl_vertex_program *_TnlProgram;
1948
1949    /** Cache of fixed-function programs */
1950    struct gl_program_cache *Cache;
1951
1952    GLboolean _Overriden;
1953 };
1954
1955
1956 /**
1957  * Context state for geometry programs.
1958  */
1959 struct gl_geometry_program_state
1960 {
1961    GLboolean Enabled;               /**< GL_ARB_GEOMETRY_SHADER4 */
1962    GLboolean _Enabled;              /**< Enabled and valid program? */
1963    struct gl_geometry_program *Current;  /**< user-bound geometry program */
1964
1965    /** Currently enabled and valid program (including internal programs
1966     * and compiled shader programs).
1967     */
1968    struct gl_geometry_program *_Current;
1969
1970    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1971
1972    /** Cache of fixed-function programs */
1973    struct gl_program_cache *Cache;
1974 };
1975
1976 /**
1977  * Context state for fragment programs.
1978  */
1979 struct gl_fragment_program_state
1980 {
1981    GLboolean Enabled;     /**< User-set fragment program enable flag */
1982    GLboolean _Enabled;    /**< Enabled and _valid_ user program? */
1983    struct gl_fragment_program *Current;  /**< User-bound fragment program */
1984
1985    /** Currently enabled and valid fragment program (including internal
1986     * programs, user-defined fragment programs and GLSL fragment shaders).
1987     * This is the program we must use when rendering.
1988     */
1989    struct gl_fragment_program *_Current;
1990
1991    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1992
1993    /** Should fixed-function texturing be implemented with a fragment prog? */
1994    GLboolean _MaintainTexEnvProgram;
1995
1996    /** Program to emulate fixed-function texture env/combine (see above) */
1997    struct gl_fragment_program *_TexEnvProgram;
1998
1999    /** Cache of fixed-function programs */
2000    struct gl_program_cache *Cache;
2001 };
2002
2003
2004 /**
2005  * ATI_fragment_shader runtime state
2006  */
2007 #define ATI_FS_INPUT_PRIMARY 0
2008 #define ATI_FS_INPUT_SECONDARY 1
2009
2010 struct atifs_instruction;
2011 struct atifs_setupinst;
2012
2013 /**
2014  * ATI fragment shader
2015  */
2016 struct ati_fragment_shader
2017 {
2018    GLuint Id;
2019    GLint RefCount;
2020    struct atifs_instruction *Instructions[2];
2021    struct atifs_setupinst *SetupInst[2];
2022    GLfloat Constants[8][4];
2023    GLbitfield LocalConstDef;  /**< Indicates which constants have been set */
2024    GLubyte numArithInstr[2];
2025    GLubyte regsAssigned[2];
2026    GLubyte NumPasses;         /**< 1 or 2 */
2027    GLubyte cur_pass;
2028    GLubyte last_optype;
2029    GLboolean interpinp1;
2030    GLboolean isValid;
2031    GLuint swizzlerq;
2032 };
2033
2034 /**
2035  * Context state for GL_ATI_fragment_shader
2036  */
2037 struct gl_ati_fragment_shader_state
2038 {
2039    GLboolean Enabled;
2040    GLboolean _Enabled;                  /**< enabled and valid shader? */
2041    GLboolean Compiling;
2042    GLfloat GlobalConstants[8][4];
2043    struct ati_fragment_shader *Current;
2044 };
2045
2046
2047 /**
2048  * Occlusion/timer query object.
2049  */
2050 struct gl_query_object
2051 {
2052    GLenum Target;      /**< The query target, when active */
2053    GLuint Id;          /**< hash table ID/name */
2054    GLuint64EXT Result; /**< the counter */
2055    GLboolean Active;   /**< inside Begin/EndQuery */
2056    GLboolean Ready;    /**< result is ready? */
2057 };
2058
2059
2060 /**
2061  * Context state for query objects.
2062  */
2063 struct gl_query_state
2064 {
2065    struct _mesa_HashTable *QueryObjects;
2066    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2067    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2068
2069    /** GL_NV_conditional_render */
2070    struct gl_query_object *CondRenderQuery;
2071
2072    /** GL_EXT_transform_feedback */
2073    struct gl_query_object *PrimitivesGenerated;
2074    struct gl_query_object *PrimitivesWritten;
2075
2076    /** GL_ARB_timer_query */
2077    struct gl_query_object *TimeElapsed;
2078
2079    GLenum CondRenderMode;
2080 };
2081
2082
2083 /** Sync object state */
2084 struct gl_sync_object {
2085    struct simple_node link;
2086    GLenum Type;               /**< GL_SYNC_FENCE */
2087    GLuint Name;               /**< Fence name */
2088    GLint RefCount;            /**< Reference count */
2089    GLboolean DeletePending;   /**< Object was deleted while there were still
2090                                * live references (e.g., sync not yet finished)
2091                                */
2092    GLenum SyncCondition;
2093    GLbitfield Flags;          /**< Flags passed to glFenceSync */
2094    GLuint StatusFlag:1;       /**< Has the sync object been signaled? */
2095 };
2096
2097
2098 /** Set by #pragma directives */
2099 struct gl_sl_pragmas
2100 {
2101    GLboolean IgnoreOptimize;  /**< ignore #pragma optimize(on/off) ? */
2102    GLboolean IgnoreDebug;     /**< ignore #pragma debug(on/off) ? */
2103    GLboolean Optimize;  /**< defaults on */
2104    GLboolean Debug;     /**< defaults off */
2105 };
2106
2107
2108 /**
2109  * A GLSL vertex or fragment shader object.
2110  */
2111 struct gl_shader
2112 {
2113    GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER || GL_GEOMETRY_SHADER_ARB (first field!) */
2114    GLuint Name;  /**< AKA the handle */
2115    GLint RefCount;  /**< Reference count */
2116    GLboolean DeletePending;
2117    GLboolean CompileStatus;
2118    const GLchar *Source;  /**< Source code string */
2119    GLuint SourceChecksum;       /**< for debug/logging purposes */
2120    struct gl_program *Program;  /**< Post-compile assembly code */
2121    GLchar *InfoLog;
2122    struct gl_sl_pragmas Pragmas;
2123
2124    unsigned Version;       /**< GLSL version used for linking */
2125
2126    struct exec_list *ir;
2127    struct glsl_symbol_table *symbols;
2128
2129    /** Shaders containing built-in functions that are used for linking. */
2130    struct gl_shader *builtins_to_link[16];
2131    unsigned num_builtins_to_link;
2132 };
2133
2134
2135 /**
2136  * A GLSL program object.
2137  * Basically a linked collection of vertex and fragment shaders.
2138  */
2139 struct gl_shader_program
2140 {
2141    GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
2142    GLuint Name;  /**< aka handle or ID */
2143    GLint RefCount;  /**< Reference count */
2144    GLboolean DeletePending;
2145
2146    GLuint NumShaders;          /**< number of attached shaders */
2147    struct gl_shader **Shaders; /**< List of attached the shaders */
2148
2149    /** User-defined attribute bindings (glBindAttribLocation) */
2150    struct gl_program_parameter_list *Attributes;
2151
2152    /** Transform feedback varyings */
2153    struct {
2154       GLenum BufferMode;
2155       GLuint NumVarying;
2156       GLchar **VaryingNames;  /**< Array [NumVarying] of char * */
2157    } TransformFeedback;
2158
2159    /** Geometry shader state - copied into gl_geometry_program at link time */
2160    struct {
2161       GLint VerticesOut;
2162       GLenum InputType;  /**< GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_ARB,
2163                               GL_TRIANGLES, or GL_TRIANGLES_ADJACENCY_ARB */
2164       GLenum OutputType; /**< GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP */
2165    } Geom;
2166
2167    /** Vertex shader state - copied into gl_vertex_program at link time */
2168    struct {
2169       GLboolean UsesClipDistance; /**< True if gl_ClipDistance is written to. */
2170    } Vert;
2171
2172    /* post-link info: */
2173    struct gl_vertex_program *VertexProgram;     /**< Linked vertex program */
2174    struct gl_fragment_program *FragmentProgram; /**< Linked fragment prog */
2175    struct gl_geometry_program *GeometryProgram; /**< Linked geometry prog */
2176    struct gl_uniform_list *Uniforms;
2177    struct gl_program_parameter_list *Varying;
2178    GLboolean LinkStatus;   /**< GL_LINK_STATUS */
2179    GLboolean Validated;
2180    GLboolean _Used;        /**< Ever used for drawing? */
2181    GLchar *InfoLog;
2182
2183    unsigned Version;       /**< GLSL version used for linking */
2184
2185    /**
2186     * Per-stage shaders resulting from the first stage of linking.
2187     *
2188     * Set of linked shaders for this program.  The array is accessed using the
2189     * \c MESA_SHADER_* defines.  Entries for non-existent stages will be
2190     * \c NULL.
2191     */
2192    struct gl_shader *_LinkedShaders[MESA_SHADER_TYPES];
2193 };
2194
2195
2196 #define GLSL_DUMP      0x1  /**< Dump shaders to stdout */
2197 #define GLSL_LOG       0x2  /**< Write shaders to files */
2198 #define GLSL_OPT       0x4  /**< Force optimizations (override pragmas) */
2199 #define GLSL_NO_OPT    0x8  /**< Force no optimizations (override pragmas) */
2200 #define GLSL_UNIFORMS 0x10  /**< Print glUniform calls */
2201 #define GLSL_NOP_VERT 0x20  /**< Force no-op vertex shaders */
2202 #define GLSL_NOP_FRAG 0x40  /**< Force no-op fragment shaders */
2203 #define GLSL_USE_PROG 0x80  /**< Log glUseProgram calls */
2204
2205
2206 /**
2207  * Context state for GLSL vertex/fragment shaders.
2208  */
2209 struct gl_shader_state
2210 {
2211    /**
2212     * Programs used for rendering
2213     *
2214     * There is a separate program set for each shader stage.  If
2215     * GL_EXT_separate_shader_objects is not supported, each of these must point
2216     * to \c NULL or to the same program.
2217     */
2218    struct gl_shader_program *CurrentVertexProgram;
2219    struct gl_shader_program *CurrentGeometryProgram;
2220    struct gl_shader_program *CurrentFragmentProgram;
2221
2222    /**
2223     * Program used by glUniform calls.
2224     *
2225     * Explicitly set by \c glUseProgram and \c glActiveProgramEXT.
2226     */
2227    struct gl_shader_program *ActiveProgram;
2228
2229    GLbitfield Flags;                    /**< Mask of GLSL_x flags */
2230 };
2231
2232 /**
2233  * Compiler options for a single GLSL shaders type
2234  */
2235 struct gl_shader_compiler_options
2236 {
2237    /** Driver-selectable options: */
2238    GLboolean EmitCondCodes;             /**< Use condition codes? */
2239    GLboolean EmitNVTempInitialization;  /**< 0-fill NV temp registers */
2240    GLboolean EmitNoLoops;
2241    GLboolean EmitNoFunctions;
2242    GLboolean EmitNoCont;                  /**< Emit CONT opcode? */
2243    GLboolean EmitNoMainReturn;            /**< Emit CONT/RET opcodes? */
2244    GLboolean EmitNoNoise;                 /**< Emit NOISE opcodes? */
2245    GLboolean EmitNoPow;                   /**< Emit POW opcodes? */
2246    GLboolean LowerClipDistance; /**< Lower gl_ClipDistance from float[8] to vec4[2]? */
2247
2248    /**
2249     * \name Forms of indirect addressing the driver cannot do.
2250     */
2251    /*@{*/
2252    GLboolean EmitNoIndirectInput;   /**< No indirect addressing of inputs */
2253    GLboolean EmitNoIndirectOutput;  /**< No indirect addressing of outputs */
2254    GLboolean EmitNoIndirectTemp;    /**< No indirect addressing of temps */
2255    GLboolean EmitNoIndirectUniform; /**< No indirect addressing of constants */
2256    /*@}*/
2257
2258    GLuint MaxIfDepth;               /**< Maximum nested IF blocks */
2259    GLuint MaxUnrollIterations;
2260
2261    struct gl_sl_pragmas DefaultPragmas; /**< Default #pragma settings */
2262 };
2263
2264 /**
2265  * Transform feedback object state
2266  */
2267 struct gl_transform_feedback_object
2268 {
2269    GLuint Name;  /**< AKA the object ID */
2270    GLint RefCount;
2271    GLboolean Active;  /**< Is transform feedback enabled? */
2272    GLboolean Paused;  /**< Is transform feedback paused? */
2273
2274    /** The feedback buffers */
2275    GLuint BufferNames[MAX_FEEDBACK_ATTRIBS];
2276    struct gl_buffer_object *Buffers[MAX_FEEDBACK_ATTRIBS];
2277
2278    /** Start of feedback data in dest buffer */
2279    GLintptr Offset[MAX_FEEDBACK_ATTRIBS];
2280    /** Max data to put into dest buffer (in bytes) */
2281    GLsizeiptr Size[MAX_FEEDBACK_ATTRIBS];
2282 };
2283
2284
2285 /**
2286  * Context state for transform feedback.
2287  */
2288 struct gl_transform_feedback
2289 {
2290    GLenum Mode;       /**< GL_POINTS, GL_LINES or GL_TRIANGLES */
2291
2292    GLboolean RasterDiscard;  /**< GL_RASTERIZER_DISCARD */
2293
2294    /** The general binding point (GL_TRANSFORM_FEEDBACK_BUFFER) */
2295    struct gl_buffer_object *CurrentBuffer;
2296
2297    /** The table of all transform feedback objects */
2298    struct _mesa_HashTable *Objects;
2299
2300    /** The current xform-fb object (GL_TRANSFORM_FEEDBACK_BINDING) */
2301    struct gl_transform_feedback_object *CurrentObject;
2302
2303    /** The default xform-fb object (Name==0) */
2304    struct gl_transform_feedback_object *DefaultObject;
2305 };
2306
2307
2308
2309 /**
2310  * State which can be shared by multiple contexts:
2311  */
2312 struct gl_shared_state
2313 {
2314    _glthread_Mutex Mutex;                  /**< for thread safety */
2315    GLint RefCount;                         /**< Reference count */
2316    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2317    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2318
2319    /** Default texture objects (shared by all texture units) */
2320    struct gl_texture_object *DefaultTex[NUM_TEXTURE_TARGETS];
2321
2322    /** Fallback texture used when a bound texture is incomplete */
2323    struct gl_texture_object *FallbackTex;
2324
2325    /**
2326     * \name Thread safety and statechange notification for texture
2327     * objects.
2328     *
2329     * \todo Improve the granularity of locking.
2330     */
2331    /*@{*/
2332    _glthread_Mutex TexMutex;            /**< texobj thread safety */
2333    GLuint TextureStateStamp;            /**< state notification for shared tex */
2334    /*@}*/
2335
2336    /** Default buffer object for vertex arrays that aren't in VBOs */
2337    struct gl_buffer_object *NullBufferObj;
2338
2339    /**
2340     * \name Vertex/geometry/fragment programs
2341     */
2342    /*@{*/
2343    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2344    struct gl_vertex_program *DefaultVertexProgram;
2345    struct gl_fragment_program *DefaultFragmentProgram;
2346    struct gl_geometry_program *DefaultGeometryProgram;
2347    /*@}*/
2348
2349    /* GL_ATI_fragment_shader */
2350    struct _mesa_HashTable *ATIShaders;
2351    struct ati_fragment_shader *DefaultFragmentShader;
2352
2353    struct _mesa_HashTable *BufferObjects;
2354
2355    /** Table of both gl_shader and gl_shader_program objects */
2356    struct _mesa_HashTable *ShaderObjects;
2357
2358    /* GL_EXT_framebuffer_object */
2359    struct _mesa_HashTable *RenderBuffers;
2360    struct _mesa_HashTable *FrameBuffers;
2361
2362    /* GL_ARB_sync */
2363    struct simple_node SyncObjects;
2364
2365    /** GL_ARB_sampler_objects */
2366    struct _mesa_HashTable *SamplerObjects;
2367
2368    void *DriverData;  /**< Device driver shared state */
2369 };
2370
2371
2372
2373
2374 /**
2375  * A renderbuffer stores colors or depth values or stencil values.
2376  * A framebuffer object will have a collection of these.
2377  * Data are read/written to the buffer with a handful of Get/Put functions.
2378  *
2379  * Instances of this object are allocated with the Driver's NewRenderbuffer
2380  * hook.  Drivers will likely wrap this class inside a driver-specific
2381  * class to simulate inheritance.
2382  */
2383 struct gl_renderbuffer
2384 {
2385    _glthread_Mutex Mutex;                  /**< for thread safety */
2386    GLuint ClassID;        /**< Useful for drivers */
2387    GLuint Name;
2388    GLint RefCount;
2389    GLuint Width, Height;
2390    GLint RowStride;       /**< Padded width in units of pixels */
2391    GLboolean Purgeable;   /**< Is the buffer purgeable under memory pressure? */
2392
2393    GLboolean AttachedAnytime; /**< TRUE if it was attached to a framebuffer */
2394
2395    GLubyte NumSamples;
2396
2397    GLenum InternalFormat; /**< The user-specified format */
2398    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2399                                GL_STENCIL_INDEX. */
2400    gl_format Format;      /**< The actual renderbuffer memory format */
2401
2402    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2403    GLvoid *Data;        /**< This may not be used by some kinds of RBs */
2404
2405    /* Used to wrap one renderbuffer around another: */
2406    struct gl_renderbuffer *Wrapped;
2407
2408    /* Delete this renderbuffer */
2409    void (*Delete)(struct gl_renderbuffer *rb);
2410
2411    /* Allocate new storage for this renderbuffer */
2412    GLboolean (*AllocStorage)(struct gl_context *ctx, struct gl_renderbuffer *rb,
2413                              GLenum internalFormat,
2414                              GLuint width, GLuint height);
2415
2416    /* Lock/Unlock are called before/after calling the Get/Put functions.
2417     * Not sure this is the right place for these yet.
2418    void (*Lock)(struct gl_context *ctx, struct gl_renderbuffer *rb);
2419    void (*Unlock)(struct gl_context *ctx, struct gl_renderbuffer *rb);
2420     */
2421
2422    /* Return a pointer to the element/pixel at (x,y).
2423     * Should return NULL if the buffer memory can't be directly addressed.
2424     */
2425    void *(*GetPointer)(struct gl_context *ctx, struct gl_renderbuffer *rb,
2426                        GLint x, GLint y);
2427
2428    /* Get/Read a row of values.
2429     * The values will be of format _BaseFormat and type DataType.
2430     */
2431    void (*GetRow)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2432                   GLint x, GLint y, void *values);
2433
2434    /* Get/Read values at arbitrary locations.
2435     * The values will be of format _BaseFormat and type DataType.
2436     */
2437    void (*GetValues)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2438                      const GLint x[], const GLint y[], void *values);
2439
2440    /* Put/Write a row of values.
2441     * The values will be of format _BaseFormat and type DataType.
2442     */
2443    void (*PutRow)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2444                   GLint x, GLint y, const void *values, const GLubyte *mask);
2445
2446    /* Put/Write a row of RGB values.  This is a special-case routine that's
2447     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2448     * a common case for glDrawPixels and some triangle routines.
2449     * The values will be of format GL_RGB and type DataType.
2450     */
2451    void (*PutRowRGB)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2452                     GLint x, GLint y, const void *values, const GLubyte *mask);
2453
2454
2455    /* Put/Write a row of identical values.
2456     * The values will be of format _BaseFormat and type DataType.
2457     */
2458    void (*PutMonoRow)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2459                      GLint x, GLint y, const void *value, const GLubyte *mask);
2460
2461    /* Put/Write values at arbitrary locations.
2462     * The values will be of format _BaseFormat and type DataType.
2463     */
2464    void (*PutValues)(struct gl_context *ctx, struct gl_renderbuffer *rb, GLuint count,
2465                      const GLint x[], const GLint y[], const void *values,
2466                      const GLubyte *mask);
2467    /* Put/Write identical values at arbitrary locations.
2468     * The values will be of format _BaseFormat and type DataType.
2469     */
2470    void (*PutMonoValues)(struct gl_context *ctx, struct gl_renderbuffer *rb,
2471                          GLuint count, const GLint x[], const GLint y[],
2472                          const void *value, const GLubyte *mask);
2473 };
2474
2475
2476 /**
2477  * A renderbuffer attachment points to either a texture object (and specifies
2478  * a mipmap level, cube face or 3D texture slice) or points to a renderbuffer.
2479  */
2480 struct gl_renderbuffer_attachment
2481 {
2482    GLenum Type;  /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
2483    GLboolean Complete;
2484
2485    /**
2486     * If \c Type is \c GL_RENDERBUFFER_EXT, this stores a pointer to the
2487     * application supplied renderbuffer object.
2488     */
2489    struct gl_renderbuffer *Renderbuffer;
2490
2491    /**
2492     * If \c Type is \c GL_TEXTURE, this stores a pointer to the application
2493     * supplied texture object.
2494     */
2495    struct gl_texture_object *Texture;
2496    GLuint TextureLevel; /**< Attached mipmap level. */
2497    GLuint CubeMapFace;  /**< 0 .. 5, for cube map textures. */
2498    GLuint Zoffset;      /**< Slice for 3D textures,  or layer for both 1D
2499                          * and 2D array textures */
2500 };
2501
2502
2503 /**
2504  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2505  * In C++ terms, think of this as a base class from which device drivers
2506  * will make derived classes.
2507  */
2508 struct gl_framebuffer
2509 {
2510    _glthread_Mutex Mutex;  /**< for thread safety */
2511    /**
2512     * If zero, this is a window system framebuffer.  If non-zero, this
2513     * is a FBO framebuffer; note that for some devices (i.e. those with
2514     * a natural pixel coordinate system for FBOs that differs from the
2515     * OpenGL/Mesa coordinate system), this means that the viewport,
2516     * polygon face orientation, and polygon stipple will have to be inverted.
2517     */
2518    GLuint Name;
2519
2520    GLint RefCount;
2521    GLboolean DeletePending;
2522
2523    /**
2524     * The framebuffer's visual. Immutable if this is a window system buffer.
2525     * Computed from attachments if user-made FBO.
2526     */
2527    struct gl_config Visual;
2528
2529    GLboolean Initialized;
2530
2531    GLuint Width, Height;        /**< size of frame buffer in pixels */
2532
2533    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2534    /*@{*/
2535    GLint _Xmin, _Xmax;  /**< inclusive */
2536    GLint _Ymin, _Ymax;  /**< exclusive */
2537    /*@}*/
2538
2539    /** \name  Derived Z buffer stuff */
2540    /*@{*/
2541    GLuint _DepthMax;    /**< Max depth buffer value */
2542    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2543    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2544    /*@}*/
2545
2546    /** One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2547    GLenum _Status;
2548
2549    /** Integer color values */
2550    GLboolean _IntegerColor;
2551
2552    /** Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2553    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2554
2555    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2556     * attribute group and GL_PIXEL attribute group, respectively.
2557     */
2558    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2559    GLenum ColorReadBuffer;
2560
2561    /** Computed from ColorDraw/ReadBuffer above */
2562    GLuint _NumColorDrawBuffers;
2563    GLint _ColorDrawBufferIndexes[MAX_DRAW_BUFFERS]; /**< BUFFER_x or -1 */
2564    GLint _ColorReadBufferIndex; /* -1 = None */
2565    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS];
2566    struct gl_renderbuffer *_ColorReadBuffer;
2567
2568    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2569     * depth/stencil buffers attached above. */
2570    struct gl_renderbuffer *_DepthBuffer;
2571    struct gl_renderbuffer *_StencilBuffer;
2572
2573    /** Delete this framebuffer */
2574    void (*Delete)(struct gl_framebuffer *fb);
2575 };
2576
2577
2578 /**
2579  * Precision info for shader datatypes.  See glGetShaderPrecisionFormat().
2580  */
2581 struct gl_precision
2582 {
2583    GLushort RangeMin;   /**< min value exponent */
2584    GLushort RangeMax;   /**< max value exponent */
2585    GLushort Precision;  /**< number of mantissa bits */
2586 };
2587
2588
2589 /**
2590  * Limits for vertex, geometry and fragment programs/shaders.
2591  */
2592 struct gl_program_constants
2593 {
2594    /* logical limits */
2595    GLuint MaxInstructions;
2596    GLuint MaxAluInstructions;
2597    GLuint MaxTexInstructions;
2598    GLuint MaxTexIndirections;
2599    GLuint MaxAttribs;
2600    GLuint MaxTemps;
2601    GLuint MaxAddressRegs;
2602    GLuint MaxAddressOffset;  /**< [-MaxAddressOffset, MaxAddressOffset-1] */
2603    GLuint MaxParameters;
2604    GLuint MaxLocalParams;
2605    GLuint MaxEnvParams;
2606    /* native/hardware limits */
2607    GLuint MaxNativeInstructions;
2608    GLuint MaxNativeAluInstructions;
2609    GLuint MaxNativeTexInstructions;
2610    GLuint MaxNativeTexIndirections;
2611    GLuint MaxNativeAttribs;
2612    GLuint MaxNativeTemps;
2613    GLuint MaxNativeAddressRegs;
2614    GLuint MaxNativeParameters;
2615    /* For shaders */
2616    GLuint MaxUniformComponents;  /**< Usually == MaxParameters * 4 */
2617    /* ES 2.0 and GL_ARB_ES2_compatibility */
2618    struct gl_precision LowFloat, MediumFloat, HighFloat;
2619    struct gl_precision LowInt, MediumInt, HighInt;
2620 };
2621
2622
2623 /**
2624  * Constants which may be overridden by device driver during context creation
2625  * but are never changed after that.
2626  */
2627 struct gl_constants
2628 {
2629    GLint MaxTextureMbytes;      /**< Max memory per image, in MB */
2630    GLint MaxTextureLevels;      /**< Max mipmap levels. */
2631    GLint Max3DTextureLevels;    /**< Max mipmap levels for 3D textures */
2632    GLint MaxCubeTextureLevels;  /**< Max mipmap levels for cube textures */
2633    GLint MaxArrayTextureLayers; /**< Max layers in array textures */
2634    GLint MaxTextureRectSize;    /**< Max rectangle texture size, in pixes */
2635    GLuint MaxTextureCoordUnits;
2636    GLuint MaxTextureImageUnits;
2637    GLuint MaxVertexTextureImageUnits;
2638    GLuint MaxCombinedTextureImageUnits;
2639    GLuint MaxGeometryTextureImageUnits;
2640    GLuint MaxTextureUnits;           /**< = MIN(CoordUnits, ImageUnits) */
2641    GLfloat MaxTextureMaxAnisotropy;  /**< GL_EXT_texture_filter_anisotropic */
2642    GLfloat MaxTextureLodBias;        /**< GL_EXT_texture_lod_bias */
2643    GLuint MaxTextureBufferSize;      /**< GL_ARB_texture_buffer_object */
2644
2645    GLuint MaxArrayLockSize;
2646
2647    GLint SubPixelBits;
2648
2649    GLfloat MinPointSize, MaxPointSize;       /**< aliased */
2650    GLfloat MinPointSizeAA, MaxPointSizeAA;   /**< antialiased */
2651    GLfloat PointSizeGranularity;
2652    GLfloat MinLineWidth, MaxLineWidth;       /**< aliased */
2653    GLfloat MinLineWidthAA, MaxLineWidthAA;   /**< antialiased */
2654    GLfloat LineWidthGranularity;
2655
2656    GLuint MaxColorTableSize;
2657
2658    GLuint MaxClipPlanes;
2659    GLuint MaxLights;
2660    GLfloat MaxShininess;                     /**< GL_NV_light_max_exponent */
2661    GLfloat MaxSpotExponent;                  /**< GL_NV_light_max_exponent */
2662
2663    GLuint MaxViewportWidth, MaxViewportHeight;
2664
2665    struct gl_program_constants VertexProgram;   /**< GL_ARB_vertex_program */
2666    struct gl_program_constants FragmentProgram; /**< GL_ARB_fragment_program */
2667    struct gl_program_constants GeometryProgram;  /**< GL_ARB_geometry_shader4 */
2668    GLuint MaxProgramMatrices;
2669    GLuint MaxProgramMatrixStackDepth;
2670
2671    /** vertex array / buffer object bounds checking */
2672    GLboolean CheckArrayBounds;
2673
2674    GLuint MaxDrawBuffers;    /**< GL_ARB_draw_buffers */
2675
2676    GLuint MaxColorAttachments;   /**< GL_EXT_framebuffer_object */
2677    GLuint MaxRenderbufferSize;   /**< GL_EXT_framebuffer_object */
2678    GLuint MaxSamples;            /**< GL_ARB_framebuffer_object */
2679
2680    /** Number of varying vectors between vertex and fragment shaders */
2681    GLuint MaxVarying;
2682    GLuint MaxVertexVaryingComponents;   /**< Between vert and geom shader */
2683    GLuint MaxGeometryVaryingComponents; /**< Between geom and frag shader */
2684
2685    /** GL_ARB_geometry_shader4 */
2686    GLuint MaxGeometryOutputVertices;
2687    GLuint MaxGeometryTotalOutputComponents;
2688
2689    GLuint GLSLVersion;  /**< GLSL version supported (ex: 120 = 1.20) */
2690
2691    /**
2692     * Does the driver support real 32-bit integers?  (Otherwise, integers are
2693     * simulated via floats.)
2694     */
2695    GLboolean NativeIntegers;
2696
2697    /**
2698     * If the driver supports real 32-bit integers, what integer value should be
2699     * used for boolean true in uniform uploads?  (Usually 1 or ~0.)
2700     */
2701    GLuint UniformBooleanTrue;
2702
2703    /** Which texture units support GL_ATI_envmap_bumpmap as targets */
2704    GLbitfield SupportedBumpUnits;
2705
2706    /**
2707     * Maximum amount of time, measured in nanseconds, that the server can wait.
2708     */
2709    GLuint64 MaxServerWaitTimeout;
2710
2711    /** GL_EXT_provoking_vertex */
2712    GLboolean QuadsFollowProvokingVertexConvention;
2713
2714    /** OpenGL version 3.0 */
2715    GLbitfield ContextFlags;  /**< Ex: GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT */
2716
2717    /** OpenGL version 3.2 */
2718    GLbitfield ProfileMask;   /**< Mask of CONTEXT_x_PROFILE_BIT */
2719
2720    /** GL_EXT_transform_feedback */
2721    GLuint MaxTransformFeedbackSeparateAttribs;
2722    GLuint MaxTransformFeedbackSeparateComponents;
2723    GLuint MaxTransformFeedbackInterleavedComponents;
2724
2725    /** GL_EXT_gpu_shader4 */
2726    GLint MinProgramTexelOffset, MaxProgramTexelOffset;
2727
2728    /* GL_EXT_framebuffer_sRGB */
2729    GLboolean sRGBCapable; /* can enable sRGB blend/update on FBOs */
2730
2731    /* GL_ARB_robustness */
2732    GLenum ResetStrategy;
2733 };
2734
2735
2736 /**
2737  * Enable flag for each OpenGL extension.  Different device drivers will
2738  * enable different extensions at runtime.
2739  */
2740 struct gl_extensions
2741 {
2742    GLboolean dummy;  /* don't remove this! */
2743    GLboolean dummy_true;  /* Set true by _mesa_init_extensions(). */
2744    GLboolean dummy_false; /* Set false by _mesa_init_extensions(). */
2745    GLboolean ARB_ES2_compatibility;
2746    GLboolean ARB_blend_func_extended;
2747    GLboolean ARB_color_buffer_float;
2748    GLboolean ARB_copy_buffer;
2749    GLboolean ARB_depth_buffer_float;
2750    GLboolean ARB_depth_clamp;
2751    GLboolean ARB_depth_texture;
2752    GLboolean ARB_draw_buffers;
2753    GLboolean ARB_draw_buffers_blend;
2754    GLboolean ARB_draw_elements_base_vertex;
2755    GLboolean ARB_draw_instanced;
2756    GLboolean ARB_fragment_coord_conventions;
2757    GLboolean ARB_fragment_program;
2758    GLboolean ARB_fragment_program_shadow;
2759    GLboolean ARB_fragment_shader;
2760    GLboolean ARB_framebuffer_object;
2761    GLboolean ARB_explicit_attrib_location;
2762    GLboolean ARB_geometry_shader4;
2763    GLboolean ARB_half_float_pixel;
2764    GLboolean ARB_half_float_vertex;
2765    GLboolean ARB_instanced_arrays;
2766    GLboolean ARB_map_buffer_range;
2767    GLboolean ARB_occlusion_query;
2768    GLboolean ARB_occlusion_query2;
2769    GLboolean ARB_point_sprite;
2770    GLboolean ARB_sampler_objects;
2771    GLboolean ARB_seamless_cube_map;
2772    GLboolean ARB_shader_objects;
2773    GLboolean ARB_shader_stencil_export;
2774    GLboolean ARB_shader_texture_lod;
2775    GLboolean ARB_shading_language_100;
2776    GLboolean ARB_shadow;
2777    GLboolean ARB_shadow_ambient;
2778    GLboolean ARB_sync;
2779    GLboolean ARB_texture_border_clamp;
2780    GLboolean ARB_texture_buffer_object;
2781    GLboolean ARB_texture_compression_rgtc;
2782    GLboolean ARB_texture_cube_map;
2783    GLboolean ARB_texture_env_combine;
2784    GLboolean ARB_texture_env_crossbar;
2785    GLboolean ARB_texture_env_dot3;
2786    GLboolean ARB_texture_float;
2787    GLboolean ARB_texture_multisample;
2788    GLboolean ARB_texture_non_power_of_two;
2789    GLboolean ARB_texture_rg;
2790    GLboolean ARB_texture_rgb10_a2ui;
2791    GLboolean ARB_timer_query;
2792    GLboolean ARB_transform_feedback2;
2793    GLboolean ARB_transpose_matrix;
2794    GLboolean ARB_uniform_buffer_object;
2795    GLboolean ARB_vertex_array_object;
2796    GLboolean ARB_vertex_program;
2797    GLboolean ARB_vertex_shader;
2798    GLboolean ARB_vertex_type_2_10_10_10_rev;
2799    GLboolean ARB_window_pos;
2800    GLboolean EXT_blend_color;
2801    GLboolean EXT_blend_equation_separate;
2802    GLboolean EXT_blend_func_separate;
2803    GLboolean EXT_blend_minmax;
2804    GLboolean EXT_clip_volume_hint;
2805    GLboolean EXT_compiled_vertex_array;
2806    GLboolean EXT_depth_bounds_test;
2807    GLboolean EXT_draw_buffers2;
2808    GLboolean EXT_draw_range_elements;
2809    GLboolean EXT_fog_coord;
2810    GLboolean EXT_framebuffer_blit;
2811    GLboolean EXT_framebuffer_multisample;
2812    GLboolean EXT_framebuffer_object;
2813    GLboolean EXT_framebuffer_sRGB;
2814    GLboolean EXT_gpu_program_parameters;
2815    GLboolean EXT_gpu_shader4;
2816    GLboolean EXT_packed_depth_stencil;
2817    GLboolean EXT_packed_float;
2818    GLboolean EXT_packed_pixels;
2819    GLboolean EXT_pixel_buffer_object;
2820    GLboolean EXT_point_parameters;
2821    GLboolean EXT_provoking_vertex;
2822    GLboolean EXT_rescale_normal;
2823    GLboolean EXT_shadow_funcs;
2824    GLboolean EXT_secondary_color;
2825    GLboolean EXT_separate_shader_objects;
2826    GLboolean EXT_separate_specular_color;
2827    GLboolean EXT_stencil_two_side;
2828    GLboolean EXT_texture3D;
2829    GLboolean EXT_texture_array;
2830    GLboolean EXT_texture_compression_latc;
2831    GLboolean EXT_texture_compression_s3tc;
2832    GLboolean EXT_texture_env_dot3;
2833    GLboolean EXT_texture_filter_anisotropic;
2834    GLboolean EXT_texture_integer;
2835    GLboolean EXT_texture_mirror_clamp;
2836    GLboolean EXT_texture_shared_exponent;
2837    GLboolean EXT_texture_snorm;
2838    GLboolean EXT_texture_sRGB;
2839    GLboolean EXT_texture_sRGB_decode;
2840    GLboolean EXT_texture_swizzle;
2841    GLboolean EXT_transform_feedback;
2842    GLboolean EXT_timer_query;
2843    GLboolean EXT_vertex_array_bgra;
2844    GLboolean OES_standard_derivatives;
2845    /* vendor extensions */
2846    GLboolean AMD_conservative_depth;
2847    GLboolean AMD_seamless_cubemap_per_texture;
2848    GLboolean APPLE_packed_pixels;
2849    GLboolean APPLE_vertex_array_object;
2850    GLboolean APPLE_object_purgeable;
2851    GLboolean ATI_envmap_bumpmap;
2852    GLboolean ATI_texture_compression_3dc;
2853    GLboolean ATI_texture_mirror_once;
2854    GLboolean ATI_texture_env_combine3;
2855    GLboolean ATI_fragment_shader;
2856    GLboolean ATI_separate_stencil;
2857    GLboolean IBM_rasterpos_clip;
2858    GLboolean IBM_multimode_draw_arrays;
2859    GLboolean MESA_pack_invert;
2860    GLboolean MESA_resize_buffers;
2861    GLboolean MESA_ycbcr_texture;
2862    GLboolean MESA_texture_array;
2863    GLboolean NV_blend_square;
2864    GLboolean NV_conditional_render;
2865    GLboolean NV_fragment_program;
2866    GLboolean NV_fragment_program_option;
2867    GLboolean NV_light_max_exponent;
2868    GLboolean NV_point_sprite;
2869    GLboolean NV_primitive_restart;
2870    GLboolean NV_texture_barrier;
2871    GLboolean NV_texgen_reflection;
2872    GLboolean NV_texture_env_combine4;
2873    GLboolean NV_texture_rectangle;
2874    GLboolean NV_vertex_program;
2875    GLboolean NV_vertex_program1_1;
2876    GLboolean SGIS_texture_lod;
2877    GLboolean TDFX_texture_compression_FXT1;
2878    GLboolean S3_s3tc;
2879    GLboolean OES_EGL_image;
2880    GLboolean OES_draw_texture;
2881    GLboolean extension_sentinel;
2882    /** The extension string */
2883    const GLubyte *String;
2884    /** Number of supported extensions */
2885    GLuint Count;
2886 };
2887
2888
2889 /**
2890  * A stack of matrices (projection, modelview, color, texture, etc).
2891  */
2892 struct gl_matrix_stack
2893 {
2894    GLmatrix *Top;      /**< points into Stack */
2895    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2896    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2897    GLuint MaxDepth;    /**< size of Stack[] array */
2898    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2899 };
2900
2901
2902 /**
2903  * \name Bits for image transfer operations
2904  * \sa __struct gl_contextRec::ImageTransferState.
2905  */
2906 /*@{*/
2907 #define IMAGE_SCALE_BIAS_BIT                      0x1
2908 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2909 #define IMAGE_MAP_COLOR_BIT                       0x4
2910 #define IMAGE_CLAMP_BIT                           0x800
2911
2912
2913 /** Pixel Transfer ops */
2914 #define IMAGE_BITS (IMAGE_SCALE_BIAS_BIT |                      \
2915                     IMAGE_SHIFT_OFFSET_BIT |                    \
2916                     IMAGE_MAP_COLOR_BIT)
2917
2918 /**
2919  * \name Bits to indicate what state has changed.
2920  */
2921 /*@{*/
2922 #define _NEW_MODELVIEW         (1 << 0)   /**< gl_context::ModelView */
2923 #define _NEW_PROJECTION        (1 << 1)   /**< gl_context::Projection */
2924 #define _NEW_TEXTURE_MATRIX    (1 << 2)   /**< gl_context::TextureMatrix */
2925 #define _NEW_COLOR             (1 << 3)   /**< gl_context::Color */
2926 #define _NEW_DEPTH             (1 << 4)   /**< gl_context::Depth */
2927 #define _NEW_EVAL              (1 << 5)   /**< gl_context::Eval, EvalMap */
2928 #define _NEW_FOG               (1 << 6)   /**< gl_context::Fog */
2929 #define _NEW_HINT              (1 << 7)   /**< gl_context::Hint */
2930 #define _NEW_LIGHT             (1 << 8)   /**< gl_context::Light */
2931 #define _NEW_LINE              (1 << 9)   /**< gl_context::Line */
2932 #define _NEW_PIXEL             (1 << 10)  /**< gl_context::Pixel */
2933 #define _NEW_POINT             (1 << 11)  /**< gl_context::Point */
2934 #define _NEW_POLYGON           (1 << 12)  /**< gl_context::Polygon */
2935 #define _NEW_POLYGONSTIPPLE    (1 << 13)  /**< gl_context::PolygonStipple */
2936 #define _NEW_SCISSOR           (1 << 14)  /**< gl_context::Scissor */
2937 #define _NEW_STENCIL           (1 << 15)  /**< gl_context::Stencil */
2938 #define _NEW_TEXTURE           (1 << 16)  /**< gl_context::Texture */
2939 #define _NEW_TRANSFORM         (1 << 17)  /**< gl_context::Transform */
2940 #define _NEW_VIEWPORT          (1 << 18)  /**< gl_context::Viewport */
2941 #define _NEW_PACKUNPACK        (1 << 19)  /**< gl_context::Pack, Unpack */
2942 #define _NEW_ARRAY             (1 << 20)  /**< gl_context::Array */
2943 #define _NEW_RENDERMODE        (1 << 21)  /**< gl_context::RenderMode, etc */
2944 #define _NEW_BUFFERS           (1 << 22)  /**< gl_context::Visual, DrawBuffer, */
2945 #define _NEW_CURRENT_ATTRIB    (1 << 23)  /**< gl_context::Current */
2946 #define _NEW_MULTISAMPLE       (1 << 24)  /**< gl_context::Multisample */
2947 #define _NEW_TRACK_MATRIX      (1 << 25)  /**< gl_context::VertexProgram */
2948 #define _NEW_PROGRAM           (1 << 26)  /**< New program/shader state */
2949 #define _NEW_PROGRAM_CONSTANTS (1 << 27)
2950 #define _NEW_BUFFER_OBJECT     (1 << 28)
2951 #define _NEW_FRAG_CLAMP        (1 << 29)
2952 #define _NEW_ALL ~0
2953 /*@}*/
2954
2955
2956 /**
2957  * \name Bits to track array state changes
2958  *
2959  * Also used to summarize array enabled.
2960  */
2961 /*@{*/
2962 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2963 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2964 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2965 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2966 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2967 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2968 #define _NEW_ARRAY_INDEX            VERT_BIT_COLOR_INDEX
2969 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_EDGEFLAG
2970 #define _NEW_ARRAY_POINT_SIZE       VERT_BIT_COLOR_INDEX  /* aliased */
2971 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2972 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2973 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2974 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2975 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2976 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2977 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2978 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2979 #define _NEW_ARRAY_ATTRIB_0         VERT_BIT_GENERIC0  /* start at bit 16 */
2980 #define _NEW_ARRAY_ALL              0xffffffff
2981
2982
2983 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2984 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2985 /*@}*/
2986
2987
2988
2989 /**
2990  * \name A bunch of flags that we think might be useful to drivers.
2991  *
2992  * Set in the __struct gl_contextRec::_TriangleCaps bitfield.
2993  */
2994 /*@{*/
2995 #define DD_FLATSHADE                0x1
2996 #define DD_SEPARATE_SPECULAR        0x2
2997 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2998 #define DD_TRI_LIGHT_TWOSIDE        0x8
2999 #define DD_TRI_UNFILLED             0x10
3000 #define DD_TRI_SMOOTH               0x20
3001 #define DD_TRI_STIPPLE              0x40
3002 #define DD_TRI_OFFSET               0x80
3003 #define DD_LINE_SMOOTH              0x100
3004 #define DD_LINE_STIPPLE             0x200
3005 #define DD_POINT_SMOOTH             0x400
3006 #define DD_POINT_ATTEN              0x800
3007 #define DD_TRI_TWOSTENCIL           0x1000
3008 /*@}*/
3009
3010
3011 /**
3012  * \name Define the state changes under which each of these bits might change
3013  */
3014 /*@{*/
3015 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
3016 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
3017 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
3018 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
3019 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
3020 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
3021 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
3022 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
3023 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
3024 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
3025 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
3026 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
3027 #define _DD_NEW_POINT_SIZE               _NEW_POINT
3028 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
3029 /*@}*/
3030
3031
3032 /**
3033  * Composite state flags
3034  */
3035 /*@{*/
3036 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
3037                                            _NEW_TEXTURE |       \
3038                                            _NEW_POINT |         \
3039                                            _NEW_PROGRAM |       \
3040                                            _NEW_MODELVIEW)
3041 /*@}*/
3042
3043
3044
3045
3046 /* This has to be included here. */
3047 #include "dd.h"
3048
3049
3050 /**
3051  * Display list flags.
3052  * Strictly this is a tnl-private concept, but it doesn't seem
3053  * worthwhile adding a tnl private structure just to hold this one bit
3054  * of information:
3055  */
3056 #define DLIST_DANGLING_REFS     0x1
3057
3058
3059 /** Opaque declaration of display list payload data type */
3060 union gl_dlist_node;
3061
3062
3063 /**
3064  * Provide a location where information about a display list can be
3065  * collected.  Could be extended with driverPrivate structures,
3066  * etc. in the future.
3067  */
3068 struct gl_display_list
3069 {
3070    GLuint Name;
3071    GLbitfield Flags;  /**< DLIST_x flags */
3072    /** The dlist commands are in a linked list of nodes */
3073    union gl_dlist_node *Head;
3074 };
3075
3076
3077 /**
3078  * State used during display list compilation and execution.
3079  */
3080 struct gl_dlist_state
3081 {
3082    GLuint CallDepth;            /**< Current recursion calling depth */
3083
3084    struct gl_display_list *CurrentList; /**< List currently being compiled */
3085    union gl_dlist_node *CurrentBlock; /**< Pointer to current block of nodes */
3086    GLuint CurrentPos;           /**< Index into current block of nodes */
3087
3088    GLvertexformat ListVtxfmt;
3089
3090    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
3091    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
3092
3093    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
3094    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
3095
3096    GLubyte ActiveIndex;
3097    GLfloat CurrentIndex;
3098
3099    GLubyte ActiveEdgeFlag;
3100    GLboolean CurrentEdgeFlag;
3101
3102    struct {
3103       /* State known to have been set by the currently-compiling display
3104        * list.  Used to eliminate some redundant state changes.
3105        */
3106       GLenum ShadeModel;
3107    } Current;
3108 };
3109
3110
3111 /**
3112  * Enum for the OpenGL APIs we know about and may support.
3113  */
3114 typedef enum
3115 {
3116    API_OPENGL,
3117    API_OPENGLES,
3118    API_OPENGLES2
3119 } gl_api;
3120
3121
3122 /**
3123  * Mesa rendering context.
3124  *
3125  * This is the central context data structure for Mesa.  Almost all
3126  * OpenGL state is contained in this structure.
3127  * Think of this as a base class from which device drivers will derive
3128  * sub classes.
3129  *
3130  * The struct gl_context typedef names this structure.
3131  */
3132 struct gl_context
3133 {
3134    /** State possibly shared with other contexts in the address space */
3135    struct gl_shared_state *Shared;
3136
3137    /** \name API function pointer tables */
3138    /*@{*/
3139    gl_api API;
3140    struct _glapi_table *Save;   /**< Display list save functions */
3141    struct _glapi_table *Exec;   /**< Execute functions */
3142    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
3143    /*@}*/
3144
3145    struct gl_config Visual;
3146    struct gl_framebuffer *DrawBuffer;   /**< buffer for writing */
3147    struct gl_framebuffer *ReadBuffer;   /**< buffer for reading */
3148    struct gl_framebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
3149    struct gl_framebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
3150
3151    /**
3152     * Device driver function pointer table
3153     */
3154    struct dd_function_table Driver;
3155
3156    void *DriverCtx;     /**< Points to device driver context/state */
3157
3158    /** Core/Driver constants */
3159    struct gl_constants Const;
3160
3161    /** \name The various 4x4 matrix stacks */
3162    /*@{*/
3163    struct gl_matrix_stack ModelviewMatrixStack;
3164    struct gl_matrix_stack ProjectionMatrixStack;
3165    struct gl_matrix_stack TextureMatrixStack[MAX_TEXTURE_UNITS];
3166    struct gl_matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
3167    struct gl_matrix_stack *CurrentStack; /**< Points to one of the above stacks */
3168    /*@}*/
3169
3170    /** Combined modelview and projection matrix */
3171    GLmatrix _ModelProjectMatrix;
3172
3173    /** \name Display lists */
3174    struct gl_dlist_state ListState;
3175
3176    GLboolean ExecuteFlag;       /**< Execute GL commands? */
3177    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
3178
3179    /** Extension information */
3180    struct gl_extensions Extensions;
3181
3182    /** Version info */
3183    GLuint VersionMajor, VersionMinor;
3184    char *VersionString;
3185
3186    /** \name State attribute stack (for glPush/PopAttrib) */
3187    /*@{*/
3188    GLuint AttribStackDepth;
3189    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
3190    /*@}*/
3191
3192    /** \name Renderer attribute groups
3193     *
3194     * We define a struct for each attribute group to make pushing and popping
3195     * attributes easy.  Also it's a good organization.
3196     */
3197    /*@{*/
3198    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
3199    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
3200    struct gl_current_attrib     Current;        /**< Current attributes */
3201    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
3202    struct gl_eval_attrib        Eval;           /**< Eval attributes */
3203    struct gl_fog_attrib         Fog;            /**< Fog attributes */
3204    struct gl_hint_attrib        Hint;           /**< Hint attributes */
3205    struct gl_light_attrib       Light;          /**< Light attributes */
3206    struct gl_line_attrib        Line;           /**< Line attributes */
3207    struct gl_list_attrib        List;           /**< List attributes */
3208    struct gl_multisample_attrib Multisample;
3209    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
3210    struct gl_point_attrib       Point;          /**< Point attributes */
3211    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
3212    GLuint PolygonStipple[32];                   /**< Polygon stipple */
3213    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
3214    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
3215    struct gl_texture_attrib     Texture;        /**< Texture attributes */
3216    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
3217    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
3218    /*@}*/
3219
3220    /** \name Client attribute stack */
3221    /*@{*/
3222    GLuint ClientAttribStackDepth;
3223    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
3224    /*@}*/
3225
3226    /** \name Client attribute groups */
3227    /*@{*/
3228    struct gl_array_attrib       Array;  /**< Vertex arrays */
3229    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
3230    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
3231    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
3232    /*@}*/
3233
3234    /** \name Other assorted state (not pushed/popped on attribute stack) */
3235    /*@{*/
3236    struct gl_pixelmaps          PixelMaps;
3237
3238    struct gl_evaluators EvalMap;   /**< All evaluators */
3239    struct gl_feedback   Feedback;  /**< Feedback */
3240    struct gl_selection  Select;    /**< Selection */
3241
3242    struct gl_program_state Program;  /**< general program state */
3243    struct gl_vertex_program_state VertexProgram;
3244    struct gl_fragment_program_state FragmentProgram;
3245    struct gl_geometry_program_state GeometryProgram;
3246    struct gl_ati_fragment_shader_state ATIFragmentShader;
3247
3248    struct gl_shader_state Shader; /**< GLSL shader object state */
3249    struct gl_shader_compiler_options ShaderCompilerOptions[MESA_SHADER_TYPES];
3250
3251    struct gl_query_state Query;  /**< occlusion, timer queries */
3252
3253    struct gl_transform_feedback TransformFeedback;
3254
3255    struct gl_buffer_object *CopyReadBuffer; /**< GL_ARB_copy_buffer */
3256    struct gl_buffer_object *CopyWriteBuffer; /**< GL_ARB_copy_buffer */
3257    /*@}*/
3258
3259    struct gl_meta_state *Meta;  /**< for "meta" operations */
3260
3261    /* GL_EXT_framebuffer_object */
3262    struct gl_renderbuffer *CurrentRenderbuffer;
3263
3264    GLenum ErrorValue;        /**< Last error code */
3265
3266    /* GL_ARB_robustness */
3267    GLenum ResetStatus;
3268
3269    /**
3270     * Recognize and silence repeated error debug messages in buggy apps.
3271     */
3272    const char *ErrorDebugFmtString;
3273    GLuint ErrorDebugCount;
3274
3275    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
3276    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
3277
3278    GLboolean ViewportInitialized;  /**< has viewport size been initialized? */
3279
3280    GLbitfield varying_vp_inputs;  /**< mask of VERT_BIT_* flags */
3281
3282    /** \name Derived state */
3283    /*@{*/
3284    /** Bitwise-or of DD_* flags.  Note that this bitfield may be used before
3285     * state validation so they need to always be current.
3286     */
3287    GLbitfield _TriangleCaps;
3288    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
3289    GLfloat _EyeZDir[3];
3290    GLfloat _ModelViewInvScale;
3291    GLboolean _NeedEyeCoords;
3292    GLboolean _ForceEyeCoords;
3293
3294    GLuint TextureStateTimestamp; /**< detect changes to shared state */
3295
3296    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
3297    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
3298    /**@}*/
3299
3300    struct gl_list_extensions *ListExt; /**< driver dlist extensions */
3301
3302    /** \name For debugging/development only */
3303    /*@{*/
3304    GLboolean FirstTimeCurrent;
3305    /*@}*/
3306
3307    /** software compression/decompression supported or not */
3308    GLboolean Mesa_DXTn;
3309
3310    GLboolean TextureFormatSupported[MESA_FORMAT_COUNT];
3311
3312    /**
3313     * Use dp4 (rather than mul/mad) instructions for position
3314     * transformation?
3315     */
3316    GLboolean mvp_with_dp4;
3317
3318    /**
3319     * \name Hooks for module contexts.
3320     *
3321     * These will eventually live in the driver or elsewhere.
3322     */
3323    /*@{*/
3324    void *swrast_context;
3325    void *swsetup_context;
3326    void *swtnl_context;
3327    void *swtnl_im;
3328    struct st_context *st;
3329    void *aelt_context;
3330    /*@}*/
3331 };
3332
3333
3334 #ifdef DEBUG
3335 extern int MESA_VERBOSE;
3336 extern int MESA_DEBUG_FLAGS;
3337 # define MESA_FUNCTION __FUNCTION__
3338 #else
3339 # define MESA_VERBOSE 0
3340 # define MESA_DEBUG_FLAGS 0
3341 # define MESA_FUNCTION "a function"
3342 # ifndef NDEBUG
3343 #  define NDEBUG
3344 # endif
3345 #endif
3346
3347
3348 /** The MESA_VERBOSE var is a bitmask of these flags */
3349 enum _verbose
3350 {
3351    VERBOSE_VARRAY               = 0x0001,
3352    VERBOSE_TEXTURE              = 0x0002,
3353    VERBOSE_MATERIAL             = 0x0004,
3354    VERBOSE_PIPELINE             = 0x0008,
3355    VERBOSE_DRIVER               = 0x0010,
3356    VERBOSE_STATE                = 0x0020,
3357    VERBOSE_API                  = 0x0040,
3358    VERBOSE_DISPLAY_LIST         = 0x0100,
3359    VERBOSE_LIGHTING             = 0x0200,
3360    VERBOSE_PRIMS                = 0x0400,
3361    VERBOSE_VERTS                = 0x0800,
3362    VERBOSE_DISASSEM             = 0x1000,
3363    VERBOSE_DRAW                 = 0x2000,
3364    VERBOSE_SWAPBUFFERS          = 0x4000
3365 };
3366
3367
3368 /** The MESA_DEBUG_FLAGS var is a bitmask of these flags */
3369 enum _debug
3370 {
3371    DEBUG_ALWAYS_FLUSH           = 0x1
3372 };
3373
3374
3375
3376 #endif /* MTYPES_H */