src/mesa/main/mtypes.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.7
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file mtypes.h
  28  * Main Mesa data structures.
  29  *
  30  * Please try to mark derived values with a leading underscore ('_').
  31  */
  32
  33 #ifndef MTYPES_H
  34 #define MTYPES_H
  35
  36
  37 #include "main/glheader.h"
  38 #include "main/config.h"
  39 #include "main/mfeatures.h"
  40 #include "glapi/glapi.h"
  41 #include "math/m_matrix.h"      /* GLmatrix */
  42 #include "main/simple_list.h"   /* struct simple_node */
  43 #include "main/formats.h"       /* MESA_FORMAT_COUNT */
  44
  45
  46 #ifdef __cplusplus
  47 extern "C" {
  48 #endif
  49
  50
  51 /**
  52  * \name 64-bit extension of GLbitfield.
  53  */
  54 /*@{*/
  55 typedef GLuint64 GLbitfield64;
  56
  57 /** Set a single bit */
  58 #define BITFIELD64_BIT(b)      ((GLbitfield64)1 << (b))
  59 /** Set all bits up to excluding bit b */
  60 #define BITFIELD64_MASK(b)      \
  61    ((b) == 64 ? (~(GLbitfield64)0) : BITFIELD64_BIT(b) - 1)
  62 /** Set count bits starting from bit b  */
  63 #define BITFIELD64_RANGE(b, count) \
  64    (BITFIELD64_MASK((b) + (count)) & ~BITFIELD64_MASK(b))
  65
  66
  67 /**
  68  * \name Some forward type declarations
  69  */
  70 /*@{*/
  71 struct _mesa_HashTable;
  72 struct gl_attrib_node;
  73 struct gl_list_extensions;
  74 struct gl_meta_state;
  75 struct gl_program_cache;
  76 struct gl_texture_object;
  77 struct gl_context;
  78 struct st_context;
  79 struct gl_uniform_storage;
  80 struct prog_instruction;
  81 struct gl_program_parameter_list;
  82 /*@}*/
  83
  84
  85 /** Extra draw modes beyond GL_POINTS, GL_TRIANGLE_FAN, etc */
  86 #define PRIM_OUTSIDE_BEGIN_END   (GL_POLYGON+1)
  87 #define PRIM_INSIDE_UNKNOWN_PRIM (GL_POLYGON+2)
  88 #define PRIM_UNKNOWN             (GL_POLYGON+3)
  89
  90
  91
  92 /**
  93  * Indexes for vertex program attributes.
  94  * GL_NV_vertex_program aliases generic attributes over the conventional
  95  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
  96  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
  97  * generic attributes are distinct/separate).
  98  */
  99 typedef enum
 100 {
 101    VERT_ATTRIB_POS = 0,
 102    VERT_ATTRIB_WEIGHT = 1,
 103    VERT_ATTRIB_NORMAL = 2,
 104    VERT_ATTRIB_COLOR0 = 3,
 105    VERT_ATTRIB_COLOR1 = 4,
 106    VERT_ATTRIB_FOG = 5,
 107    VERT_ATTRIB_COLOR_INDEX = 6,
 108    VERT_ATTRIB_EDGEFLAG = 7,
 109    VERT_ATTRIB_TEX0 = 8,
 110    VERT_ATTRIB_TEX1 = 9,
 111    VERT_ATTRIB_TEX2 = 10,
 112    VERT_ATTRIB_TEX3 = 11,
 113    VERT_ATTRIB_TEX4 = 12,
 114    VERT_ATTRIB_TEX5 = 13,
 115    VERT_ATTRIB_TEX6 = 14,
 116    VERT_ATTRIB_TEX7 = 15,
 117    VERT_ATTRIB_POINT_SIZE = 16,
 118    VERT_ATTRIB_GENERIC0 = 17,
 119    VERT_ATTRIB_GENERIC1 = 18,
 120    VERT_ATTRIB_GENERIC2 = 19,
 121    VERT_ATTRIB_GENERIC3 = 20,
 122    VERT_ATTRIB_GENERIC4 = 21,
 123    VERT_ATTRIB_GENERIC5 = 22,
 124    VERT_ATTRIB_GENERIC6 = 23,
 125    VERT_ATTRIB_GENERIC7 = 24,
 126    VERT_ATTRIB_GENERIC8 = 25,
 127    VERT_ATTRIB_GENERIC9 = 26,
 128    VERT_ATTRIB_GENERIC10 = 27,
 129    VERT_ATTRIB_GENERIC11 = 28,
 130    VERT_ATTRIB_GENERIC12 = 29,
 131    VERT_ATTRIB_GENERIC13 = 30,
 132    VERT_ATTRIB_GENERIC14 = 31,
 133    VERT_ATTRIB_GENERIC15 = 32,
 134    VERT_ATTRIB_MAX = 33
 135 } gl_vert_attrib;
 136
 137 /**
 138  * Symbolic constats to help iterating over
 139  * specific blocks of vertex attributes.
 140  *
 141  * VERT_ATTRIB_FF
 142  *   includes all fixed function attributes as well as
 143  *   the aliased GL_NV_vertex_program shader attributes.
 144  * VERT_ATTRIB_TEX
 145  *   include the classic texture coordinate attributes.
 146  *   Is a subset of VERT_ATTRIB_FF.
 147  * VERT_ATTRIB_GENERIC_NV
 148  *   include the NV shader attributes.
 149  *   Is a subset of VERT_ATTRIB_FF.
 150  * VERT_ATTRIB_GENERIC
 151  *   include the OpenGL 2.0+ GLSL generic shader attributes.
 152  *   These alias the generic GL_ARB_vertex_shader attributes.
 153  */
 154 #define VERT_ATTRIB_FF(i)           (VERT_ATTRIB_POS + (i))
 155 #define VERT_ATTRIB_FF_MAX          VERT_ATTRIB_GENERIC0
 156
 157 #define VERT_ATTRIB_TEX(i)          (VERT_ATTRIB_TEX0 + (i))
 158 #define VERT_ATTRIB_TEX_MAX         MAX_TEXTURE_COORD_UNITS
 159
 160 #define VERT_ATTRIB_GENERIC_NV(i)   (VERT_ATTRIB_POS + (i))
 161 #define VERT_ATTRIB_GENERIC_NV_MAX  MAX_VERTEX_GENERIC_ATTRIBS
 162
 163 #define VERT_ATTRIB_GENERIC(i)      (VERT_ATTRIB_GENERIC0 + (i))
 164 #define VERT_ATTRIB_GENERIC_MAX     MAX_VERTEX_GENERIC_ATTRIBS
 165
 166 /**
 167  * Bitflags for vertex attributes.
 168  * These are used in bitfields in many places.
 169  */
 170 /*@{*/
 171 #define VERT_BIT_POS             BITFIELD64_BIT(VERT_ATTRIB_POS)
 172 #define VERT_BIT_WEIGHT          BITFIELD64_BIT(VERT_ATTRIB_WEIGHT)
 173 #define VERT_BIT_NORMAL          BITFIELD64_BIT(VERT_ATTRIB_NORMAL)
 174 #define VERT_BIT_COLOR0          BITFIELD64_BIT(VERT_ATTRIB_COLOR0)
 175 #define VERT_BIT_COLOR1          BITFIELD64_BIT(VERT_ATTRIB_COLOR1)
 176 #define VERT_BIT_FOG             BITFIELD64_BIT(VERT_ATTRIB_FOG)
 177 #define VERT_BIT_COLOR_INDEX     BITFIELD64_BIT(VERT_ATTRIB_COLOR_INDEX)
 178 #define VERT_BIT_EDGEFLAG        BITFIELD64_BIT(VERT_ATTRIB_EDGEFLAG)
 179 #define VERT_BIT_TEX0            BITFIELD64_BIT(VERT_ATTRIB_TEX0)
 180 #define VERT_BIT_TEX1            BITFIELD64_BIT(VERT_ATTRIB_TEX1)
 181 #define VERT_BIT_TEX2            BITFIELD64_BIT(VERT_ATTRIB_TEX2)
 182 #define VERT_BIT_TEX3            BITFIELD64_BIT(VERT_ATTRIB_TEX3)
 183 #define VERT_BIT_TEX4            BITFIELD64_BIT(VERT_ATTRIB_TEX4)
 184 #define VERT_BIT_TEX5            BITFIELD64_BIT(VERT_ATTRIB_TEX5)
 185 #define VERT_BIT_TEX6            BITFIELD64_BIT(VERT_ATTRIB_TEX6)
 186 #define VERT_BIT_TEX7            BITFIELD64_BIT(VERT_ATTRIB_TEX7)
 187 #define VERT_BIT_POINT_SIZE      BITFIELD64_BIT(VERT_ATTRIB_POINT_SIZE)
 188 #define VERT_BIT_GENERIC0        BITFIELD64_BIT(VERT_ATTRIB_GENERIC0)
 189
 190 #define VERT_BIT(i)              BITFIELD64_BIT(i)
 191 #define VERT_BIT_ALL             BITFIELD64_RANGE(0, VERT_ATTRIB_MAX)
 192
 193 #define VERT_BIT_FF(i)           VERT_BIT(i)
 194 #define VERT_BIT_FF_ALL          BITFIELD64_RANGE(0, VERT_ATTRIB_FF_MAX)
 195 #define VERT_BIT_TEX(i)          VERT_BIT(VERT_ATTRIB_TEX(i))
 196 #define VERT_BIT_TEX_ALL         \
 197    BITFIELD64_RANGE(VERT_ATTRIB_TEX(0), VERT_ATTRIB_TEX_MAX)
 198 #define VERT_BIT_FF_NVALIAS      \
 199    BITFIELD64_RANGE(VERT_ATTRIB_POS, VERT_ATTRIB_TEX(VERT_ATTRIB_TEX_MAX))
 200
 201 #define VERT_BIT_GENERIC_NV(i)   VERT_BIT(VERT_ATTRIB_GENERIC_NV(i))
 202 #define VERT_BIT_GENERIC_NV_ALL  \
 203    BITFIELD64_RANGE(VERT_ATTRIB_GENERIC_NV(0), VERT_ATTRIB_GENERIC_NV_MAX)
 204
 205 #define VERT_BIT_GENERIC(i)      VERT_BIT(VERT_ATTRIB_GENERIC(i))
 206 #define VERT_BIT_GENERIC_ALL     \
 207    BITFIELD64_RANGE(VERT_ATTRIB_GENERIC(0), VERT_ATTRIB_GENERIC_MAX)
 208 /*@}*/
 209
 210
 211 /**
 212  * Indexes for vertex program result attributes.  Note that
 213  * _mesa_vert_result_to_frag_attrib() and _mesa_frag_attrib_to_vert_result() make
 214  * assumptions about the layout of this enum.
 215  */
 216 typedef enum
 217 {
 218    VERT_RESULT_HPOS = 0,
 219    VERT_RESULT_COL0 = 1,
 220    VERT_RESULT_COL1 = 2,
 221    VERT_RESULT_FOGC = 3,
 222    VERT_RESULT_TEX0 = 4,
 223    VERT_RESULT_TEX1 = 5,
 224    VERT_RESULT_TEX2 = 6,
 225    VERT_RESULT_TEX3 = 7,
 226    VERT_RESULT_TEX4 = 8,
 227    VERT_RESULT_TEX5 = 9,
 228    VERT_RESULT_TEX6 = 10,
 229    VERT_RESULT_TEX7 = 11,
 230    VERT_RESULT_PSIZ = 12,
 231    VERT_RESULT_BFC0 = 13,
 232    VERT_RESULT_BFC1 = 14,
 233    VERT_RESULT_EDGE = 15,
 234    VERT_RESULT_CLIP_VERTEX = 16,
 235    VERT_RESULT_CLIP_DIST0 = 17,
 236    VERT_RESULT_CLIP_DIST1 = 18,
 237    VERT_RESULT_VAR0 = 19,  /**< shader varying */
 238    VERT_RESULT_MAX = (VERT_RESULT_VAR0 + MAX_VARYING)
 239 } gl_vert_result;
 240
 241
 242 /*********************************************/
 243
 244 /**
 245  * Indexes for geometry program attributes.
 246  */
 247 typedef enum
 248 {
 249    GEOM_ATTRIB_POSITION = 0,
 250    GEOM_ATTRIB_COLOR0 = 1,
 251    GEOM_ATTRIB_COLOR1 = 2,
 252    GEOM_ATTRIB_SECONDARY_COLOR0 = 3,
 253    GEOM_ATTRIB_SECONDARY_COLOR1 = 4,
 254    GEOM_ATTRIB_FOG_FRAG_COORD = 5,
 255    GEOM_ATTRIB_POINT_SIZE = 6,
 256    GEOM_ATTRIB_CLIP_VERTEX = 7,
 257    GEOM_ATTRIB_PRIMITIVE_ID = 8,
 258    GEOM_ATTRIB_TEX_COORD = 9,
 259
 260    GEOM_ATTRIB_VAR0 = 16,
 261    GEOM_ATTRIB_MAX = (GEOM_ATTRIB_VAR0 + MAX_VARYING)
 262 } gl_geom_attrib;
 263
 264 /**
 265  * Bitflags for geometry attributes.
 266  * These are used in bitfields in many places.
 267  */
 268 /*@{*/
 269 #define GEOM_BIT_COLOR0      (1 << GEOM_ATTRIB_COLOR0)
 270 #define GEOM_BIT_COLOR1      (1 << GEOM_ATTRIB_COLOR1)
 271 #define GEOM_BIT_SCOLOR0     (1 << GEOM_ATTRIB_SECONDARY_COLOR0)
 272 #define GEOM_BIT_SCOLOR1     (1 << GEOM_ATTRIB_SECONDARY_COLOR1)
 273 #define GEOM_BIT_TEX_COORD   (1 << GEOM_ATTRIB_TEX_COORD)
 274 #define GEOM_BIT_FOG_COORD   (1 << GEOM_ATTRIB_FOG_FRAG_COORD)
 275 #define GEOM_BIT_POSITION    (1 << GEOM_ATTRIB_POSITION)
 276 #define GEOM_BIT_POINT_SIDE  (1 << GEOM_ATTRIB_POINT_SIZE)
 277 #define GEOM_BIT_CLIP_VERTEX (1 << GEOM_ATTRIB_CLIP_VERTEX)
 278 #define GEOM_BIT_PRIM_ID     (1 << GEOM_ATTRIB_PRIMITIVE_ID)
 279 #define GEOM_BIT_VAR0        (1 << GEOM_ATTRIB_VAR0)
 280
 281 #define GEOM_BIT_VAR(g)  (1 << (GEOM_BIT_VAR0 + (g)))
 282 /*@}*/
 283
 284
 285 /**
 286  * Indexes for geometry program result attributes
 287  */
 288 typedef enum
 289 {
 290    GEOM_RESULT_POS  = 0,
 291    GEOM_RESULT_COL0  = 1,
 292    GEOM_RESULT_COL1  = 2,
 293    GEOM_RESULT_SCOL0 = 3,
 294    GEOM_RESULT_SCOL1 = 4,
 295    GEOM_RESULT_FOGC = 5,
 296    GEOM_RESULT_TEX0 = 6,
 297    GEOM_RESULT_TEX1 = 7,
 298    GEOM_RESULT_TEX2 = 8,
 299    GEOM_RESULT_TEX3 = 9,
 300    GEOM_RESULT_TEX4 = 10,
 301    GEOM_RESULT_TEX5 = 11,
 302    GEOM_RESULT_TEX6 = 12,
 303    GEOM_RESULT_TEX7 = 13,
 304    GEOM_RESULT_PSIZ = 14,
 305    GEOM_RESULT_CLPV = 15,
 306    GEOM_RESULT_PRID = 16,
 307    GEOM_RESULT_LAYR = 17,
 308    GEOM_RESULT_VAR0 = 18,  /**< shader varying, should really be 16 */
 309    /* ### we need to -2 because var0 is 18 instead 16 like in the others */
 310    GEOM_RESULT_MAX  =  (GEOM_RESULT_VAR0 + MAX_VARYING - 2)
 311 } gl_geom_result;
 312
 313
 314 /**
 315  * Indexes for fragment program input attributes.  Note that
 316  * _mesa_vert_result_to_frag_attrib() and frag_attrib_to_vert_result() make
 317  * assumptions about the layout of this enum.
 318  */
 319 typedef enum
 320 {
 321    FRAG_ATTRIB_WPOS = 0,
 322    FRAG_ATTRIB_COL0 = 1,
 323    FRAG_ATTRIB_COL1 = 2,
 324    FRAG_ATTRIB_FOGC = 3,
 325    FRAG_ATTRIB_TEX0 = 4,
 326    FRAG_ATTRIB_TEX1 = 5,
 327    FRAG_ATTRIB_TEX2 = 6,
 328    FRAG_ATTRIB_TEX3 = 7,
 329    FRAG_ATTRIB_TEX4 = 8,
 330    FRAG_ATTRIB_TEX5 = 9,
 331    FRAG_ATTRIB_TEX6 = 10,
 332    FRAG_ATTRIB_TEX7 = 11,
 333    FRAG_ATTRIB_FACE = 12,  /**< front/back face */
 334    FRAG_ATTRIB_PNTC = 13,  /**< sprite/point coord */
 335    FRAG_ATTRIB_CLIP_DIST0 = 14,
 336    FRAG_ATTRIB_CLIP_DIST1 = 15,
 337    FRAG_ATTRIB_VAR0 = 16,  /**< shader varying */
 338    FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + MAX_VARYING)
 339 } gl_frag_attrib;
 340
 341
 342 /**
 343  * Convert from a gl_vert_result value to the corresponding gl_frag_attrib.
 344  *
 345  * VERT_RESULT_HPOS is converted to FRAG_ATTRIB_WPOS.
 346  *
 347  * gl_vert_result values which have no corresponding gl_frag_attrib
 348  * (VERT_RESULT_PSIZ, VERT_RESULT_BFC0, VERT_RESULT_BFC1, and
 349  * VERT_RESULT_EDGE) are converted to a value of -1.
 350  */
 351 static inline int
 352 _mesa_vert_result_to_frag_attrib(gl_vert_result vert_result)
 353 {
 354    if (vert_result >= VERT_RESULT_CLIP_DIST0)
 355       return vert_result - VERT_RESULT_CLIP_DIST0 + FRAG_ATTRIB_CLIP_DIST0;
 356    else if (vert_result <= VERT_RESULT_TEX7)
 357       return vert_result;
 358    else
 359       return -1;
 360 }
 361
 362
 363 /**
 364  * Convert from a gl_frag_attrib value to the corresponding gl_vert_result.
 365  *
 366  * FRAG_ATTRIB_WPOS is converted to VERT_RESULT_HPOS.
 367  *
 368  * gl_frag_attrib values which have no corresponding gl_vert_result
 369  * (FRAG_ATTRIB_FACE and FRAG_ATTRIB_PNTC) are converted to a value of -1.
 370  */
 371 static inline int
 372 _mesa_frag_attrib_to_vert_result(gl_frag_attrib frag_attrib)
 373 {
 374    if (frag_attrib <= FRAG_ATTRIB_TEX7)
 375       return frag_attrib;
 376    else if (frag_attrib >= FRAG_ATTRIB_CLIP_DIST0)
 377       return frag_attrib - FRAG_ATTRIB_CLIP_DIST0 + VERT_RESULT_CLIP_DIST0;
 378    else
 379       return -1;
 380 }
 381
 382
 383 /**
 384  * Bitflags for fragment program input attributes.
 385  */
 386 /*@{*/
 387 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 388 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 389 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 390 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 391 #define FRAG_BIT_FACE  (1 << FRAG_ATTRIB_FACE)
 392 #define FRAG_BIT_PNTC  (1 << FRAG_ATTRIB_PNTC)
 393 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 394 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 395 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 396 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 397 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 398 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 399 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 400 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 401 #define FRAG_BIT_VAR0  (1 << FRAG_ATTRIB_VAR0)
 402
 403 #define FRAG_BIT_TEX(U)  (FRAG_BIT_TEX0 << (U))
 404 #define FRAG_BIT_VAR(V)  (FRAG_BIT_VAR0 << (V))
 405
 406 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 407                            FRAG_BIT_TEX1|       \
 408                            FRAG_BIT_TEX2|       \
 409                            FRAG_BIT_TEX3|       \
 410                            FRAG_BIT_TEX4|       \
 411                            FRAG_BIT_TEX5|       \
 412                            FRAG_BIT_TEX6|       \
 413                            FRAG_BIT_TEX7)
 414 /*@}*/
 415
 416
 417 /**
 418  * Fragment program results
 419  */
 420 typedef enum
 421 {
 422    FRAG_RESULT_DEPTH = 0,
 423    FRAG_RESULT_STENCIL = 1,
 424    /* If a single color should be written to all render targets, this
 425     * register is written.  No FRAG_RESULT_DATAn will be written.
 426     */
 427    FRAG_RESULT_COLOR = 2,
 428
 429    /* FRAG_RESULT_DATAn are the per-render-target (GLSL gl_FragData[n]
 430     * or ARB_fragment_program fragment.color[n]) color results.  If
 431     * any are written, FRAG_RESULT_COLOR will not be written.
 432     */
 433    FRAG_RESULT_DATA0 = 3,
 434    FRAG_RESULT_MAX = (FRAG_RESULT_DATA0 + MAX_DRAW_BUFFERS)
 435 } gl_frag_result;
 436
 437
 438 /**
 439  * Indexes for all renderbuffers
 440  */
 441 typedef enum
 442 {
 443    /* the four standard color buffers */
 444    BUFFER_FRONT_LEFT,
 445    BUFFER_BACK_LEFT,
 446    BUFFER_FRONT_RIGHT,
 447    BUFFER_BACK_RIGHT,
 448    BUFFER_DEPTH,
 449    BUFFER_STENCIL,
 450    BUFFER_ACCUM,
 451    /* optional aux buffer */
 452    BUFFER_AUX0,
 453    /* generic renderbuffers */
 454    BUFFER_COLOR0,
 455    BUFFER_COLOR1,
 456    BUFFER_COLOR2,
 457    BUFFER_COLOR3,
 458    BUFFER_COLOR4,
 459    BUFFER_COLOR5,
 460    BUFFER_COLOR6,
 461    BUFFER_COLOR7,
 462    BUFFER_COUNT
 463 } gl_buffer_index;
 464
 465 /**
 466  * Bit flags for all renderbuffers
 467  */
 468 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 469 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 470 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 471 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 472 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 473 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 474 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 475 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 476 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 477 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 478 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 479 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 480 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 481 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 482 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 483 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 484 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 485 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 486 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 487
 488 /**
 489  * Mask of all the color buffer bits (but not accum).
 490  */
 491 #define BUFFER_BITS_COLOR  (BUFFER_BIT_FRONT_LEFT | \
 492                             BUFFER_BIT_BACK_LEFT | \
 493                             BUFFER_BIT_FRONT_RIGHT | \
 494                             BUFFER_BIT_BACK_RIGHT | \
 495                             BUFFER_BIT_AUX0 | \
 496                             BUFFER_BIT_COLOR0 | \
 497                             BUFFER_BIT_COLOR1 | \
 498                             BUFFER_BIT_COLOR2 | \
 499                             BUFFER_BIT_COLOR3 | \
 500                             BUFFER_BIT_COLOR4 | \
 501                             BUFFER_BIT_COLOR5 | \
 502                             BUFFER_BIT_COLOR6 | \
 503                             BUFFER_BIT_COLOR7)
 504
 505
 506 /**
 507  * Framebuffer configuration (aka visual / pixelformat)
 508  * Note: some of these fields should be boolean, but it appears that
 509  * code in drivers/dri/common/util.c requires int-sized fields.
 510  */
 511 struct gl_config
 512 {
 513    GLboolean rgbMode;
 514    GLboolean floatMode;
 515    GLboolean colorIndexMode;  /* XXX is this used anywhere? */
 516    GLuint doubleBufferMode;
 517    GLuint stereoMode;
 518
 519    GLboolean haveAccumBuffer;
 520    GLboolean haveDepthBuffer;
 521    GLboolean haveStencilBuffer;
 522
 523    GLint redBits, greenBits, blueBits, alphaBits;       /* bits per comp */
 524    GLuint redMask, greenMask, blueMask, alphaMask;
 525    GLint rgbBits;               /* total bits for rgb */
 526    GLint indexBits;             /* total bits for colorindex */
 527
 528    GLint accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits;
 529    GLint depthBits;
 530    GLint stencilBits;
 531
 532    GLint numAuxBuffers;
 533
 534    GLint level;
 535
 536    /* EXT_visual_rating / GLX 1.2 */
 537    GLint visualRating;
 538
 539    /* EXT_visual_info / GLX 1.2 */
 540    GLint transparentPixel;
 541    /*    colors are floats scaled to ints */
 542    GLint transparentRed, transparentGreen, transparentBlue, transparentAlpha;
 543    GLint transparentIndex;
 544
 545    /* ARB_multisample / SGIS_multisample */
 546    GLint sampleBuffers;
 547    GLint samples;
 548
 549    /* SGIX_pbuffer / GLX 1.3 */
 550    GLint maxPbufferWidth;
 551    GLint maxPbufferHeight;
 552    GLint maxPbufferPixels;
 553    GLint optimalPbufferWidth;   /* Only for SGIX_pbuffer. */
 554    GLint optimalPbufferHeight;  /* Only for SGIX_pbuffer. */
 555
 556    /* OML_swap_method */
 557    GLint swapMethod;
 558
 559    /* EXT_texture_from_pixmap */
 560    GLint bindToTextureRgb;
 561    GLint bindToTextureRgba;
 562    GLint bindToMipmapTexture;
 563    GLint bindToTextureTargets;
 564    GLint yInverted;
 565
 566    /* EXT_framebuffer_sRGB */
 567    GLint sRGBCapable;
 568 };
 569
 570
 571 /**
 572  * \name Bit flags used for updating material values.
 573  */
 574 /*@{*/
 575 #define MAT_ATTRIB_FRONT_AMBIENT           0
 576 #define MAT_ATTRIB_BACK_AMBIENT            1
 577 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 578 #define MAT_ATTRIB_BACK_DIFFUSE            3
 579 #define MAT_ATTRIB_FRONT_SPECULAR          4
 580 #define MAT_ATTRIB_BACK_SPECULAR           5
 581 #define MAT_ATTRIB_FRONT_EMISSION          6
 582 #define MAT_ATTRIB_BACK_EMISSION           7
 583 #define MAT_ATTRIB_FRONT_SHININESS         8
 584 #define MAT_ATTRIB_BACK_SHININESS          9
 585 #define MAT_ATTRIB_FRONT_INDEXES           10
 586 #define MAT_ATTRIB_BACK_INDEXES            11
 587 #define MAT_ATTRIB_MAX                     12
 588
 589 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 590 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 591 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 592 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 593 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 594 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 595
 596 #define MAT_INDEX_AMBIENT  0
 597 #define MAT_INDEX_DIFFUSE  1
 598 #define MAT_INDEX_SPECULAR 2
 599
 600 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 601 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 602 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 603 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 604 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 605 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 606 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 607 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 608 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 609 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 610 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 611 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 612
 613
 614 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 615                                  MAT_BIT_FRONT_AMBIENT |        \
 616                                  MAT_BIT_FRONT_DIFFUSE |        \
 617                                  MAT_BIT_FRONT_SPECULAR |       \
 618                                  MAT_BIT_FRONT_SHININESS |      \
 619                                  MAT_BIT_FRONT_INDEXES)
 620
 621 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 622                                  MAT_BIT_BACK_AMBIENT |         \
 623                                  MAT_BIT_BACK_DIFFUSE |         \
 624                                  MAT_BIT_BACK_SPECULAR |        \
 625                                  MAT_BIT_BACK_SHININESS |       \
 626                                  MAT_BIT_BACK_INDEXES)
 627
 628 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 629 /*@}*/
 630
 631
 632 /**
 633  * Material state.
 634  */
 635 struct gl_material
 636 {
 637    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 638 };
 639
 640
 641 /**
 642  * Light state flags.
 643  */
 644 /*@{*/
 645 #define LIGHT_SPOT         0x1
 646 #define LIGHT_LOCAL_VIEWER 0x2
 647 #define LIGHT_POSITIONAL   0x4
 648 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 649 /*@}*/
 650
 651
 652 /**
 653  * Light source state.
 654  */
 655 struct gl_light
 656 {
 657    struct gl_light *next;       /**< double linked list with sentinel */
 658    struct gl_light *prev;
 659
 660    GLfloat Ambient[4];          /**< ambient color */
 661    GLfloat Diffuse[4];          /**< diffuse color */
 662    GLfloat Specular[4];         /**< specular color */
 663    GLfloat EyePosition[4];      /**< position in eye coordinates */
 664    GLfloat SpotDirection[4];    /**< spotlight direction in eye coordinates */
 665    GLfloat SpotExponent;
 666    GLfloat SpotCutoff;          /**< in degrees */
 667    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 668    GLfloat ConstantAttenuation;
 669    GLfloat LinearAttenuation;
 670    GLfloat QuadraticAttenuation;
 671    GLboolean Enabled;           /**< On/off flag */
 672
 673    /**
 674     * \name Derived fields
 675     */
 676    /*@{*/
 677    GLbitfield _Flags;           /**< Mask of LIGHT_x bits defined above */
 678
 679    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 680    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 681    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 682    GLfloat _NormSpotDirection[4]; /**< normalized spotlight direction */
 683    GLfloat _VP_inf_spot_attenuation;
 684
 685    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 686    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 687    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 688    /*@}*/
 689 };
 690
 691
 692 /**
 693  * Light model state.
 694  */
 695 struct gl_lightmodel
 696 {
 697    GLfloat Ambient[4];          /**< ambient color */
 698    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 699    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 700    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 701                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 702 };
 703
 704
 705 /**
 706  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 707  */
 708 struct gl_accum_attrib
 709 {
 710    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 711 };
 712
 713
 714 /**
 715  * Used for storing clear color, texture border color, etc.
 716  * The float values are typically unclamped.
 717  */
 718 union gl_color_union
 719 {
 720    GLfloat f[4];
 721    GLint i[4];
 722    GLuint ui[4];
 723 };
 724
 725
 726 /**
 727  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 728  */
 729 struct gl_colorbuffer_attrib
 730 {
 731    GLuint ClearIndex;                      /**< Index for glClear */
 732    union gl_color_union ClearColor;        /**< Color for glClear, unclamped */
 733    GLuint IndexMask;                       /**< Color index write mask */
 734    GLubyte ColorMask[MAX_DRAW_BUFFERS][4]; /**< Each flag is 0xff or 0x0 */
 735
 736    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 737
 738    /**
 739     * \name alpha testing
 740     */
 741    /*@{*/
 742    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 743    GLenum AlphaFunc;                    /**< Alpha test function */
 744    GLfloat AlphaRefUnclamped;
 745    GLclampf AlphaRef;                   /**< Alpha reference value */
 746    /*@}*/
 747
 748    /**
 749     * \name Blending
 750     */
 751    /*@{*/
 752    GLbitfield BlendEnabled;             /**< Per-buffer blend enable flags */
 753
 754    /* NOTE: this does _not_ depend on fragment clamping or any other clamping
 755     * control, only on the fixed-pointness of the render target.
 756     * The query does however depend on fragment color clamping.
 757     */
 758    GLfloat BlendColorUnclamped[4];               /**< Blending color */
 759    GLfloat BlendColor[4];               /**< Blending color */
 760
 761    struct
 762    {
 763       GLenum SrcRGB;             /**< RGB blend source term */
 764       GLenum DstRGB;             /**< RGB blend dest term */
 765       GLenum SrcA;               /**< Alpha blend source term */
 766       GLenum DstA;               /**< Alpha blend dest term */
 767       GLenum EquationRGB;        /**< GL_ADD, GL_SUBTRACT, etc. */
 768       GLenum EquationA;          /**< GL_ADD, GL_SUBTRACT, etc. */
 769       /**
 770        * Set if any blend factor uses SRC1.  Computed at the time blend factors
 771        * get set.
 772        */
 773       GLboolean _UsesDualSrc;
 774    } Blend[MAX_DRAW_BUFFERS];
 775    /** Are the blend func terms currently different for each buffer/target? */
 776    GLboolean _BlendFuncPerBuffer;
 777    /** Are the blend equations currently different for each buffer/target? */
 778    GLboolean _BlendEquationPerBuffer;
 779    /*@}*/
 780
 781    /**
 782     * \name Logic op
 783     */
 784    /*@{*/
 785    GLenum LogicOp;                      /**< Logic operator */
 786    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 787    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 788    /*@}*/
 789
 790    GLboolean DitherFlag;                /**< Dither enable flag */
 791
 792    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 793    GLboolean _ClampFragmentColor; /** < with GL_FIXED_ONLY_ARB resolved */
 794    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 795    GLboolean _ClampReadColor;     /** < with GL_FIXED_ONLY_ARB resolved */
 796
 797    GLboolean sRGBEnabled;       /**< Framebuffer sRGB blending/updating requested */
 798 };
 799
 800
 801 /**
 802  * Current attribute group (GL_CURRENT_BIT).
 803  */
 804 struct gl_current_attrib
 805 {
 806    /**
 807     * \name Current vertex attributes.
 808     * \note Values are valid only after FLUSH_VERTICES has been called.
 809     * \note Index and Edgeflag current values are stored as floats in the
 810     * SIX and SEVEN attribute slots.
 811     */
 812    GLfloat Attrib[VERT_ATTRIB_MAX][4];  /**< Position, color, texcoords, etc */
 813
 814    /**
 815     * \name Current raster position attributes (always valid).
 816     * \note This set of attributes is very similar to the SWvertex struct.
 817     */
 818    /*@{*/
 819    GLfloat RasterPos[4];
 820    GLfloat RasterDistance;
 821    GLfloat RasterColor[4];
 822    GLfloat RasterSecondaryColor[4];
 823    GLfloat RasterTexCoords[MAX_TEXTURE_COORD_UNITS][4];
 824    GLboolean RasterPosValid;
 825    /*@}*/
 826 };
 827
 828
 829 /**
 830  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 831  */
 832 struct gl_depthbuffer_attrib
 833 {
 834    GLenum Func;                 /**< Function for depth buffer compare */
 835    GLclampd Clear;              /**< Value to clear depth buffer to */
 836    GLboolean Test;              /**< Depth buffering enabled flag */
 837    GLboolean Mask;              /**< Depth buffer writable? */
 838    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 839    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 840 };
 841
 842
 843 /**
 844  * Evaluator attribute group (GL_EVAL_BIT).
 845  */
 846 struct gl_eval_attrib
 847 {
 848    /**
 849     * \name Enable bits
 850     */
 851    /*@{*/
 852    GLboolean Map1Color4;
 853    GLboolean Map1Index;
 854    GLboolean Map1Normal;
 855    GLboolean Map1TextureCoord1;
 856    GLboolean Map1TextureCoord2;
 857    GLboolean Map1TextureCoord3;
 858    GLboolean Map1TextureCoord4;
 859    GLboolean Map1Vertex3;
 860    GLboolean Map1Vertex4;
 861    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 862    GLboolean Map2Color4;
 863    GLboolean Map2Index;
 864    GLboolean Map2Normal;
 865    GLboolean Map2TextureCoord1;
 866    GLboolean Map2TextureCoord2;
 867    GLboolean Map2TextureCoord3;
 868    GLboolean Map2TextureCoord4;
 869    GLboolean Map2Vertex3;
 870    GLboolean Map2Vertex4;
 871    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 872    GLboolean AutoNormal;
 873    /*@}*/
 874
 875    /**
 876     * \name Map Grid endpoints and divisions and calculated du values
 877     */
 878    /*@{*/
 879    GLint MapGrid1un;
 880    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 881    GLint MapGrid2un, MapGrid2vn;
 882    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 883    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 884    /*@}*/
 885 };
 886
 887
 888 /**
 889  * Fog attribute group (GL_FOG_BIT).
 890  */
 891 struct gl_fog_attrib
 892 {
 893    GLboolean Enabled;           /**< Fog enabled flag */
 894    GLfloat ColorUnclamped[4];            /**< Fog color */
 895    GLfloat Color[4];            /**< Fog color */
 896    GLfloat Density;             /**< Density >= 0.0 */
 897    GLfloat Start;               /**< Start distance in eye coords */
 898    GLfloat End;                 /**< End distance in eye coords */
 899    GLfloat Index;               /**< Fog index */
 900    GLenum Mode;                 /**< Fog mode */
 901    GLboolean ColorSumEnabled;
 902    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 903    GLfloat _Scale;              /**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
 904    GLenum FogDistanceMode;     /**< GL_NV_fog_distance */
 905 };
 906
 907
 908 /**
 909  * Hint attribute group (GL_HINT_BIT).
 910  *
 911  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 912  */
 913 struct gl_hint_attrib
 914 {
 915    GLenum PerspectiveCorrection;
 916    GLenum PointSmooth;
 917    GLenum LineSmooth;
 918    GLenum PolygonSmooth;
 919    GLenum Fog;
 920    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 921    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 922    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 923    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 924 };
 925
 926
 927 /**
 928  * Lighting attribute group (GL_LIGHT_BIT).
 929  */
 930 struct gl_light_attrib
 931 {
 932    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 933    struct gl_lightmodel Model;          /**< Lighting model */
 934
 935    /**
 936     * Front and back material values.
 937     * Note: must call FLUSH_VERTICES() before using.
 938     */
 939    struct gl_material Material;
 940
 941    GLboolean Enabled;                   /**< Lighting enabled flag */
 942    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 943    GLenum ProvokingVertex;              /**< GL_EXT_provoking_vertex */
 944    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 945    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 946    GLbitfield _ColorMaterialBitmask;    /**< bitmask formed from Face and Mode */
 947    GLboolean ColorMaterialEnabled;
 948    GLenum ClampVertexColor;             /**< GL_TRUE, GL_FALSE, GL_FIXED_ONLY */
 949    GLboolean _ClampVertexColor;
 950
 951    struct gl_light EnabledList;         /**< List sentinel */
 952
 953    /**
 954     * Derived state for optimizations:
 955     */
 956    /*@{*/
 957    GLboolean _NeedEyeCoords;
 958    GLboolean _NeedVertices;             /**< Use fast shader? */
 959    GLfloat _BaseColor[2][3];
 960    /*@}*/
 961 };
 962
 963
 964 /**
 965  * Line attribute group (GL_LINE_BIT).
 966  */
 967 struct gl_line_attrib
 968 {
 969    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 970    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 971    GLushort StipplePattern;     /**< Stipple pattern */
 972    GLint StippleFactor;         /**< Stipple repeat factor */
 973    GLfloat Width;               /**< Line width */
 974 };
 975
 976
 977 /**
 978  * Display list attribute group (GL_LIST_BIT).
 979  */
 980 struct gl_list_attrib
 981 {
 982    GLuint ListBase;
 983 };
 984
 985
 986 /**
 987  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 988  */
 989 struct gl_multisample_attrib
 990 {
 991    GLboolean Enabled;
 992    GLboolean _Enabled;   /**< true if Enabled and multisample buffer */
 993    GLboolean SampleAlphaToCoverage;
 994    GLboolean SampleAlphaToOne;
 995    GLboolean SampleCoverage;
 996    GLfloat SampleCoverageValue;
 997    GLboolean SampleCoverageInvert;
 998 };
 999
1000
1001 /**
1002  * A pixelmap (see glPixelMap)
1003  */
1004 struct gl_pixelmap
1005 {
1006    GLint Size;
1007    GLfloat Map[MAX_PIXEL_MAP_TABLE];
1008 };
1009
1010
1011 /**
1012  * Collection of all pixelmaps
1013  */
1014 struct gl_pixelmaps
1015 {
1016    struct gl_pixelmap RtoR;  /**< i.e. GL_PIXEL_MAP_R_TO_R */
1017    struct gl_pixelmap GtoG;
1018    struct gl_pixelmap BtoB;
1019    struct gl_pixelmap AtoA;
1020    struct gl_pixelmap ItoR;
1021    struct gl_pixelmap ItoG;
1022    struct gl_pixelmap ItoB;
1023    struct gl_pixelmap ItoA;
1024    struct gl_pixelmap ItoI;
1025    struct gl_pixelmap StoS;
1026 };
1027
1028
1029 /**
1030  * Pixel attribute group (GL_PIXEL_MODE_BIT).
1031  */
1032 struct gl_pixel_attrib
1033 {
1034    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
1035
1036    /*--- Begin Pixel Transfer State ---*/
1037    /* Fields are in the order in which they're applied... */
1038
1039    /** Scale & Bias (index shift, offset) */
1040    /*@{*/
1041    GLfloat RedBias, RedScale;
1042    GLfloat GreenBias, GreenScale;
1043    GLfloat BlueBias, BlueScale;
1044    GLfloat AlphaBias, AlphaScale;
1045    GLfloat DepthBias, DepthScale;
1046    GLint IndexShift, IndexOffset;
1047    /*@}*/
1048
1049    /* Pixel Maps */
1050    /* Note: actual pixel maps are not part of this attrib group */
1051    GLboolean MapColorFlag;
1052    GLboolean MapStencilFlag;
1053
1054    /*--- End Pixel Transfer State ---*/
1055
1056    /** glPixelZoom */
1057    GLfloat ZoomX, ZoomY;
1058 };
1059
1060
1061 /**
1062  * Point attribute group (GL_POINT_BIT).
1063  */
1064 struct gl_point_attrib
1065 {
1066    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
1067    GLfloat Size;                /**< User-specified point size */
1068    GLfloat Params[3];           /**< GL_EXT_point_parameters */
1069    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
1070    GLfloat Threshold;           /**< GL_EXT_point_parameters */
1071    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
1072    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
1073    GLboolean CoordReplace[MAX_TEXTURE_COORD_UNITS]; /**< GL_ARB_point_sprite*/
1074    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
1075    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
1076 };
1077
1078
1079 /**
1080  * Polygon attribute group (GL_POLYGON_BIT).
1081  */
1082 struct gl_polygon_attrib
1083 {
1084    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
1085    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
1086    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
1087    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
1088    GLboolean CullFlag;          /**< Culling on/off flag */
1089    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
1090    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
1091    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
1092    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
1093    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
1094    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
1095    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
1096    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
1097 };
1098
1099
1100 /**
1101  * Scissor attributes (GL_SCISSOR_BIT).
1102  */
1103 struct gl_scissor_attrib
1104 {
1105    GLboolean Enabled;           /**< Scissor test enabled? */
1106    GLint X, Y;                  /**< Lower left corner of box */
1107    GLsizei Width, Height;       /**< Size of box */
1108 };
1109
1110
1111 /**
1112  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1113  *
1114  * Three sets of stencil data are tracked so that OpenGL 2.0,
1115  * GL_EXT_stencil_two_side, and GL_ATI_separate_stencil can all be supported
1116  * simultaneously.  In each of the stencil state arrays, element 0 corresponds
1117  * to GL_FRONT.  Element 1 corresponds to the OpenGL 2.0 /
1118  * GL_ATI_separate_stencil GL_BACK state.  Element 2 corresponds to the
1119  * GL_EXT_stencil_two_side GL_BACK state.
1120  *
1121  * The derived value \c _BackFace is either 1 or 2 depending on whether or
1122  * not GL_STENCIL_TEST_TWO_SIDE_EXT is enabled.
1123  *
1124  * The derived value \c _TestTwoSide is set when the front-face and back-face
1125  * stencil state are different.
1126  */
1127 struct gl_stencil_attrib
1128 {
1129    GLboolean Enabled;           /**< Enabled flag */
1130    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1131    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 2) */
1132    GLboolean _Enabled;          /**< Enabled and stencil buffer present */
1133    GLboolean _TestTwoSide;
1134    GLubyte _BackFace;           /**< Current back stencil state (1 or 2) */
1135    GLenum Function[3];          /**< Stencil function */
1136    GLenum FailFunc[3];          /**< Fail function */
1137    GLenum ZPassFunc[3];         /**< Depth buffer pass function */
1138    GLenum ZFailFunc[3];         /**< Depth buffer fail function */
1139    GLint Ref[3];                /**< Reference value */
1140    GLuint ValueMask[3];         /**< Value mask */
1141    GLuint WriteMask[3];         /**< Write mask */
1142    GLuint Clear;                /**< Clear value */
1143 };
1144
1145
1146 /**
1147  * An index for each type of texture object.  These correspond to the GL
1148  * texture target enums, such as GL_TEXTURE_2D, GL_TEXTURE_CUBE_MAP, etc.
1149  * Note: the order is from highest priority to lowest priority.
1150  */
1151 typedef enum
1152 {
1153    TEXTURE_BUFFER_INDEX,
1154    TEXTURE_2D_ARRAY_INDEX,
1155    TEXTURE_1D_ARRAY_INDEX,
1156    TEXTURE_EXTERNAL_INDEX,
1157    TEXTURE_CUBE_INDEX,
1158    TEXTURE_3D_INDEX,
1159    TEXTURE_RECT_INDEX,
1160    TEXTURE_2D_INDEX,
1161    TEXTURE_1D_INDEX,
1162    NUM_TEXTURE_TARGETS
1163 } gl_texture_index;
1164
1165
1166 /**
1167  * Bit flags for each type of texture object
1168  * Used for Texture.Unit[]._ReallyEnabled flags.
1169  */
1170 /*@{*/
1171 #define TEXTURE_BUFFER_BIT   (1 << TEXTURE_BUFFER_INDEX)
1172 #define TEXTURE_2D_ARRAY_BIT (1 << TEXTURE_2D_ARRAY_INDEX)
1173 #define TEXTURE_1D_ARRAY_BIT (1 << TEXTURE_1D_ARRAY_INDEX)
1174 #define TEXTURE_EXTERNAL_BIT (1 << TEXTURE_EXTERNAL_INDEX)
1175 #define TEXTURE_CUBE_BIT     (1 << TEXTURE_CUBE_INDEX)
1176 #define TEXTURE_3D_BIT       (1 << TEXTURE_3D_INDEX)
1177 #define TEXTURE_RECT_BIT     (1 << TEXTURE_RECT_INDEX)
1178 #define TEXTURE_2D_BIT       (1 << TEXTURE_2D_INDEX)
1179 #define TEXTURE_1D_BIT       (1 << TEXTURE_1D_INDEX)
1180 /*@}*/
1181
1182
1183 /**
1184  * Texture image state.  Drivers will typically create a subclass of this
1185  * with extra fields for memory buffers, etc.
1186  */
1187 struct gl_texture_image
1188 {
1189    GLint InternalFormat;        /**< Internal format as given by the user */
1190    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1191                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1192                                  *   GL_INTENSITY, GL_DEPTH_COMPONENT or
1193                                  *   GL_DEPTH_STENCIL_EXT only. Used for
1194                                  *   choosing TexEnv arithmetic.
1195                                  */
1196    gl_format TexFormat;         /**< The actual texture memory format */
1197
1198    GLuint Border;               /**< 0 or 1 */
1199    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1200    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1201    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1202    GLuint Width2;               /**< = Width - 2*Border */
1203    GLuint Height2;              /**< = Height - 2*Border */
1204    GLuint Depth2;               /**< = Depth - 2*Border */
1205    GLuint WidthLog2;            /**< = log2(Width2) */
1206    GLuint HeightLog2;           /**< = log2(Height2) */
1207    GLuint DepthLog2;            /**< = log2(Depth2) */
1208    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1209
1210    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1211    GLuint Level;                /**< Which mipmap level am I? */
1212    /** Cube map face: index into gl_texture_object::Image[] array */
1213    GLuint Face;
1214 };
1215
1216
1217 /**
1218  * Indexes for cube map faces.
1219  */
1220 typedef enum
1221 {
1222    FACE_POS_X = 0,
1223    FACE_NEG_X = 1,
1224    FACE_POS_Y = 2,
1225    FACE_NEG_Y = 3,
1226    FACE_POS_Z = 4,
1227    FACE_NEG_Z = 5,
1228    MAX_FACES = 6
1229 } gl_face_index;
1230
1231
1232 /**
1233  * Sampler object state.  These objects are new with GL_ARB_sampler_objects
1234  * and OpenGL 3.3.  Legacy texture objects also contain a sampler object.
1235  */
1236 struct gl_sampler_object
1237 {
1238    GLuint Name;
1239    GLint RefCount;
1240
1241    GLenum WrapS;                /**< S-axis texture image wrap mode */
1242    GLenum WrapT;                /**< T-axis texture image wrap mode */
1243    GLenum WrapR;                /**< R-axis texture image wrap mode */
1244    GLenum MinFilter;            /**< minification filter */
1245    GLenum MagFilter;            /**< magnification filter */
1246    union gl_color_union BorderColor;  /**< Interpreted according to texture format */
1247    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1248    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1249    GLfloat LodBias;             /**< OpenGL 1.4 */
1250    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1251    GLenum CompareMode;          /**< GL_ARB_shadow */
1252    GLenum CompareFunc;          /**< GL_ARB_shadow */
1253    GLfloat CompareFailValue;    /**< GL_ARB_shadow_ambient */
1254    GLenum sRGBDecode;           /**< GL_DECODE_EXT or GL_SKIP_DECODE_EXT */
1255    GLboolean CubeMapSeamless;   /**< GL_AMD_seamless_cubemap_per_texture */
1256 };
1257
1258
1259 /**
1260  * Texture object state.  Contains the array of mipmap images, border color,
1261  * wrap modes, filter modes, and shadow/texcompare state.
1262  */
1263 struct gl_texture_object
1264 {
1265    _glthread_Mutex Mutex;       /**< for thread safety */
1266    GLint RefCount;              /**< reference count */
1267    GLuint Name;                 /**< the user-visible texture object ID */
1268    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1269
1270    struct gl_sampler_object Sampler;
1271
1272    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1273
1274    GLfloat Priority;            /**< in [0,1] */
1275    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1276    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1277    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1278    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1279    GLint CropRect[4];           /**< GL_OES_draw_texture */
1280    GLenum Swizzle[4];           /**< GL_EXT_texture_swizzle */
1281    GLuint _Swizzle;             /**< same as Swizzle, but SWIZZLE_* format */
1282    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1283    GLboolean _BaseComplete;     /**< Is the base texture level valid? */
1284    GLboolean _MipmapComplete;   /**< Is the whole mipmap valid? */
1285    GLboolean _IsIntegerFormat;  /**< Does the texture store integer values? */
1286    GLboolean _RenderToTexture;  /**< Any rendering to this texture? */
1287    GLboolean Purgeable;         /**< Is the buffer purgeable under memory pressure? */
1288    GLboolean Immutable;         /**< GL_ARB_texture_storage */
1289
1290    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1291    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1292
1293    /** GL_ARB_texture_buffer_object */
1294    struct gl_buffer_object *BufferObject;
1295    GLenum BufferObjectFormat;
1296    /** Equivalent Mesa format for BufferObjectFormat. */
1297    gl_format _BufferObjectFormat;
1298
1299    /** GL_OES_EGL_image_external */
1300    GLint RequiredTextureImageUnits;
1301 };
1302
1303
1304 /** Up to four combiner sources are possible with GL_NV_texture_env_combine4 */
1305 #define MAX_COMBINER_TERMS 4
1306
1307
1308 /**
1309  * Texture combine environment state.
1310  */
1311 struct gl_tex_env_combine_state
1312 {
1313    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1314    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1315    /** Source terms: GL_PRIMARY_COLOR, GL_TEXTURE, etc */
1316    GLenum SourceRGB[MAX_COMBINER_TERMS];
1317    GLenum SourceA[MAX_COMBINER_TERMS];
1318    /** Source operands: GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR, etc */
1319    GLenum OperandRGB[MAX_COMBINER_TERMS];
1320    GLenum OperandA[MAX_COMBINER_TERMS];
1321    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1322    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1323    GLuint _NumArgsRGB;   /**< Number of inputs used for the RGB combiner */
1324    GLuint _NumArgsA;     /**< Number of inputs used for the A combiner */
1325 };
1326
1327
1328 /**
1329  * TexGenEnabled flags.
1330  */
1331 /*@{*/
1332 #define S_BIT 1
1333 #define T_BIT 2
1334 #define R_BIT 4
1335 #define Q_BIT 8
1336 #define STR_BITS (S_BIT | T_BIT | R_BIT)
1337 /*@}*/
1338
1339
1340 /**
1341  * Bit flag versions of the corresponding GL_ constants.
1342  */
1343 /*@{*/
1344 #define TEXGEN_SPHERE_MAP        0x1
1345 #define TEXGEN_OBJ_LINEAR        0x2
1346 #define TEXGEN_EYE_LINEAR        0x4
1347 #define TEXGEN_REFLECTION_MAP_NV 0x8
1348 #define TEXGEN_NORMAL_MAP_NV     0x10
1349
1350 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1351                                   TEXGEN_REFLECTION_MAP_NV | \
1352                                   TEXGEN_NORMAL_MAP_NV)
1353 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1354                                   TEXGEN_REFLECTION_MAP_NV | \
1355                                   TEXGEN_NORMAL_MAP_NV     | \
1356                                   TEXGEN_EYE_LINEAR)
1357 /*@}*/
1358
1359
1360
1361 /** Tex-gen enabled for texture unit? */
1362 #define ENABLE_TEXGEN(unit) (1 << (unit))
1363
1364 /** Non-identity texture matrix for texture unit? */
1365 #define ENABLE_TEXMAT(unit) (1 << (unit))
1366
1367
1368 /**
1369  * Texture coord generation state.
1370  */
1371 struct gl_texgen
1372 {
1373    GLenum Mode;         /**< GL_EYE_LINEAR, GL_SPHERE_MAP, etc */
1374    GLbitfield _ModeBit; /**< TEXGEN_x bit corresponding to Mode */
1375    GLfloat ObjectPlane[4];
1376    GLfloat EyePlane[4];
1377 };
1378
1379
1380 /**
1381  * Texture unit state.  Contains enable flags, texture environment/function/
1382  * combiners, texgen state, and pointers to current texture objects.
1383  */
1384 struct gl_texture_unit
1385 {
1386    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1387    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1388
1389    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1390    GLclampf EnvColor[4];
1391    GLfloat EnvColorUnclamped[4];
1392
1393    struct gl_texgen GenS;
1394    struct gl_texgen GenT;
1395    struct gl_texgen GenR;
1396    struct gl_texgen GenQ;
1397    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1398    GLbitfield _GenFlags;        /**< Bitwise-OR of Gen[STRQ]._ModeBit */
1399
1400    GLfloat LodBias;             /**< for biasing mipmap levels */
1401    GLenum BumpTarget;
1402    GLfloat RotMatrix[4]; /* 2x2 matrix */
1403
1404    /** Current sampler object (GL_ARB_sampler_objects) */
1405    struct gl_sampler_object *Sampler;
1406
1407    /**
1408     * \name GL_EXT_texture_env_combine
1409     */
1410    struct gl_tex_env_combine_state Combine;
1411
1412    /**
1413     * Derived state based on \c EnvMode and the \c BaseFormat of the
1414     * currently enabled texture.
1415     */
1416    struct gl_tex_env_combine_state _EnvMode;
1417
1418    /**
1419     * Currently enabled combiner state.  This will point to either
1420     * \c Combine or \c _EnvMode.
1421     */
1422    struct gl_tex_env_combine_state *_CurrentCombine;
1423
1424    /** Current texture object pointers */
1425    struct gl_texture_object *CurrentTex[NUM_TEXTURE_TARGETS];
1426
1427    /** Points to highest priority, complete and enabled texture object */
1428    struct gl_texture_object *_Current;
1429 };
1430
1431
1432 /**
1433  * Texture attribute group (GL_TEXTURE_BIT).
1434  */
1435 struct gl_texture_attrib
1436 {
1437    GLuint CurrentUnit;   /**< GL_ACTIVE_TEXTURE */
1438    struct gl_texture_unit Unit[MAX_COMBINED_TEXTURE_IMAGE_UNITS];
1439
1440    struct gl_texture_object *ProxyTex[NUM_TEXTURE_TARGETS];
1441
1442    /** GL_ARB_texture_buffer_object */
1443    struct gl_buffer_object *BufferObject;
1444
1445    /** GL_ARB_seamless_cubemap */
1446    GLboolean CubeMapSeamless;
1447
1448    /** Texture units/samplers used by vertex or fragment texturing */
1449    GLbitfield _EnabledUnits;
1450
1451    /** Texture coord units/sets used for fragment texturing */
1452    GLbitfield _EnabledCoordUnits;
1453
1454    /** Texture coord units that have texgen enabled */
1455    GLbitfield _TexGenEnabled;
1456
1457    /** Texture coord units that have non-identity matrices */
1458    GLbitfield _TexMatEnabled;
1459
1460    /** Bitwise-OR of all Texture.Unit[i]._GenFlags */
1461    GLbitfield _GenFlags;
1462 };
1463
1464
1465 /**
1466  * Data structure representing a single clip plane (e.g. one of the elements
1467  * of the ctx->Transform.EyeUserPlane or ctx->Transform._ClipUserPlane array).
1468  */
1469 typedef GLfloat gl_clip_plane[4];
1470
1471
1472 /**
1473  * Transformation attribute group (GL_TRANSFORM_BIT).
1474  */
1475 struct gl_transform_attrib
1476 {
1477    GLenum MatrixMode;                           /**< Matrix mode */
1478    gl_clip_plane EyeUserPlane[MAX_CLIP_PLANES]; /**< User clip planes */
1479    gl_clip_plane _ClipUserPlane[MAX_CLIP_PLANES]; /**< derived */
1480    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1481    GLboolean Normalize;                         /**< Normalize all normals? */
1482    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1483    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1484    GLboolean DepthClamp;                        /**< GL_ARB_depth_clamp */
1485
1486    GLfloat CullEyePos[4];
1487    GLfloat CullObjPos[4];
1488 };
1489
1490
1491 /**
1492  * Viewport attribute group (GL_VIEWPORT_BIT).
1493  */
1494 struct gl_viewport_attrib
1495 {
1496    GLint X, Y;                  /**< position */
1497    GLsizei Width, Height;       /**< size */
1498    GLfloat Near, Far;           /**< Depth buffer range */
1499    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1500 };
1501
1502
1503 /**
1504  * GL_ARB_vertex/pixel_buffer_object buffer object
1505  */
1506 struct gl_buffer_object
1507 {
1508    _glthread_Mutex Mutex;
1509    GLint RefCount;
1510    GLuint Name;
1511    GLenum Usage;        /**< GL_STREAM_DRAW_ARB, GL_STREAM_READ_ARB, etc. */
1512    GLsizeiptrARB Size;  /**< Size of buffer storage in bytes */
1513    GLubyte *Data;       /**< Location of storage either in RAM or VRAM. */
1514    /** Fields describing a mapped buffer */
1515    /*@{*/
1516    GLbitfield AccessFlags; /**< Mask of GL_MAP_x_BIT flags */
1517    GLvoid *Pointer;     /**< User-space address of mapping */
1518    GLintptr Offset;     /**< Mapped offset */
1519    GLsizeiptr Length;   /**< Mapped length */
1520    /*@}*/
1521    GLboolean DeletePending;   /**< true if buffer object is removed from the hash */
1522    GLboolean Written;   /**< Ever written to? (for debugging) */
1523    GLboolean Purgeable; /**< Is the buffer purgeable under memory pressure? */
1524 };
1525
1526
1527 /**
1528  * Client pixel packing/unpacking attributes
1529  */
1530 struct gl_pixelstore_attrib
1531 {
1532    GLint Alignment;
1533    GLint RowLength;
1534    GLint SkipPixels;
1535    GLint SkipRows;
1536    GLint ImageHeight;
1537    GLint SkipImages;
1538    GLboolean SwapBytes;
1539    GLboolean LsbFirst;
1540    GLboolean Invert;        /**< GL_MESA_pack_invert */
1541    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1542 };
1543
1544
1545 /**
1546  * Client vertex array attributes
1547  */
1548 struct gl_client_array
1549 {
1550    GLint Size;                  /**< components per element (1,2,3,4) */
1551    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1552    GLenum Format;               /**< default: GL_RGBA, but may be GL_BGRA */
1553    GLsizei Stride;              /**< user-specified stride */
1554    GLsizei StrideB;             /**< actual stride in bytes */
1555    const GLubyte *Ptr;          /**< Points to array data */
1556    GLboolean Enabled;           /**< Enabled flag is a boolean */
1557    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1558    GLboolean Integer;           /**< Integer-valued? */
1559    GLuint InstanceDivisor;      /**< GL_ARB_instanced_arrays */
1560    GLuint _ElementSize;         /**< size of each element in bytes */
1561
1562    struct gl_buffer_object *BufferObj;/**< GL_ARB_vertex_buffer_object */
1563    GLuint _MaxElement;          /**< max element index into array buffer + 1 */
1564 };
1565
1566
1567 /**
1568  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1569  * extension, but a nice encapsulation in any case.
1570  */
1571 struct gl_array_object
1572 {
1573    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1574    GLuint Name;
1575
1576    GLint RefCount;
1577    _glthread_Mutex Mutex;
1578
1579    /**
1580     * Does the VAO use ARB semantics or Apple semantics?
1581     *
1582     * There are several ways in which ARB_vertex_array_object and
1583     * APPLE_vertex_array_object VAOs have differing semantics.  At the very
1584     * least,
1585     *
1586     *     - ARB VAOs require that all array data be sourced from vertex buffer
1587     *       objects, but Apple VAOs do not.
1588     *
1589     *     - ARB VAOs require that names come from GenVertexArrays.
1590     *
1591     * This flag notes which behavior governs this VAO.
1592     */
1593    GLboolean ARBsemantics;
1594
1595    /**
1596     * Has this array object been bound?
1597     */
1598    GLboolean _Used;
1599
1600    /** Vertex attribute arrays */
1601    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1602
1603    /** Mask of VERT_BIT_* values indicating which arrays are enabled */
1604    GLbitfield64 _Enabled;
1605
1606    /** Mask of VERT_BIT_* values indicating changed/dirty arrays */
1607    GLbitfield64 NewArrays;
1608
1609    /**
1610     * Min of all enabled arrays' _MaxElement.  When arrays reside inside VBOs
1611     * we can determine the max legal (in bounds) glDrawElements array index.
1612     */
1613    GLuint _MaxElement;
1614
1615    struct gl_buffer_object *ElementArrayBufferObj;
1616 };
1617
1618
1619 /**
1620  * Vertex array state
1621  */
1622 struct gl_array_attrib
1623 {
1624    /** Currently bound array object. See _mesa_BindVertexArrayAPPLE() */
1625    struct gl_array_object *ArrayObj;
1626
1627    /** The default vertex array object */
1628    struct gl_array_object *DefaultArrayObj;
1629
1630    /** Array objects (GL_ARB/APPLE_vertex_array_object) */
1631    struct _mesa_HashTable *Objects;
1632
1633    GLint ActiveTexture;         /**< Client Active Texture */
1634    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1635    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1636
1637    /** GL 3.1 (slightly different from GL_NV_primitive_restart) */
1638    GLboolean PrimitiveRestart;
1639    GLuint RestartIndex;
1640
1641    /* GL_ARB_vertex_buffer_object */
1642    struct gl_buffer_object *ArrayBufferObj;
1643
1644    /**
1645     * Vertex arrays as consumed by a driver.
1646     * The array pointer is set up only by the VBO module. */
1647    const struct gl_client_array **_DrawArrays; /**< 0..VERT_ATTRIB_MAX-1 */
1648 };
1649
1650
1651 /**
1652  * Feedback buffer state
1653  */
1654 struct gl_feedback
1655 {
1656    GLenum Type;
1657    GLbitfield _Mask;    /**< FB_* bits */
1658    GLfloat *Buffer;
1659    GLuint BufferSize;
1660    GLuint Count;
1661 };
1662
1663
1664 /**
1665  * Selection buffer state
1666  */
1667 struct gl_selection
1668 {
1669    GLuint *Buffer;      /**< selection buffer */
1670    GLuint BufferSize;   /**< size of the selection buffer */
1671    GLuint BufferCount;  /**< number of values in the selection buffer */
1672    GLuint Hits;         /**< number of records in the selection buffer */
1673    GLuint NameStackDepth; /**< name stack depth */
1674    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1675    GLboolean HitFlag;   /**< hit flag */
1676    GLfloat HitMinZ;     /**< minimum hit depth */
1677    GLfloat HitMaxZ;     /**< maximum hit depth */
1678 };
1679
1680
1681 /**
1682  * 1-D Evaluator control points
1683  */
1684 struct gl_1d_map
1685 {
1686    GLuint Order;        /**< Number of control points */
1687    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1688    GLfloat *Points;     /**< Points to contiguous control points */
1689 };
1690
1691
1692 /**
1693  * 2-D Evaluator control points
1694  */
1695 struct gl_2d_map
1696 {
1697    GLuint Uorder;               /**< Number of control points in U dimension */
1698    GLuint Vorder;               /**< Number of control points in V dimension */
1699    GLfloat u1, u2, du;
1700    GLfloat v1, v2, dv;
1701    GLfloat *Points;             /**< Points to contiguous control points */
1702 };
1703
1704
1705 /**
1706  * All evaluator control point state
1707  */
1708 struct gl_evaluators
1709 {
1710    /**
1711     * \name 1-D maps
1712     */
1713    /*@{*/
1714    struct gl_1d_map Map1Vertex3;
1715    struct gl_1d_map Map1Vertex4;
1716    struct gl_1d_map Map1Index;
1717    struct gl_1d_map Map1Color4;
1718    struct gl_1d_map Map1Normal;
1719    struct gl_1d_map Map1Texture1;
1720    struct gl_1d_map Map1Texture2;
1721    struct gl_1d_map Map1Texture3;
1722    struct gl_1d_map Map1Texture4;
1723    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1724    /*@}*/
1725
1726    /**
1727     * \name 2-D maps
1728     */
1729    /*@{*/
1730    struct gl_2d_map Map2Vertex3;
1731    struct gl_2d_map Map2Vertex4;
1732    struct gl_2d_map Map2Index;
1733    struct gl_2d_map Map2Color4;
1734    struct gl_2d_map Map2Normal;
1735    struct gl_2d_map Map2Texture1;
1736    struct gl_2d_map Map2Texture2;
1737    struct gl_2d_map Map2Texture3;
1738    struct gl_2d_map Map2Texture4;
1739    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1740    /*@}*/
1741 };
1742
1743
1744 struct gl_transform_feedback_varying_info
1745 {
1746    char *Name;
1747    GLenum Type;
1748    GLint Size;
1749 };
1750
1751
1752 /**
1753  * Per-output info vertex shaders for transform feedback.
1754  */
1755 struct gl_transform_feedback_output
1756 {
1757    unsigned OutputRegister;
1758    unsigned OutputBuffer;
1759    unsigned NumComponents;
1760
1761    /** offset (in DWORDs) of this output within the interleaved structure */
1762    unsigned DstOffset;
1763
1764    /**
1765     * Offset into the output register of the data to output.  For example,
1766     * if NumComponents is 2 and ComponentOffset is 1, then the data to
1767     * offset is in the y and z components of the output register.
1768     */
1769    unsigned ComponentOffset;
1770 };
1771
1772
1773 /** Post-link transform feedback info. */
1774 struct gl_transform_feedback_info
1775 {
1776    unsigned NumOutputs;
1777
1778    /**
1779     * Number of transform feedback buffers in use by this program.
1780     */
1781    unsigned NumBuffers;
1782
1783    struct gl_transform_feedback_output *Outputs;
1784
1785    /** Transform feedback varyings used for the linking of this shader program.
1786     *
1787     * Use for glGetTransformFeedbackVarying().
1788     */
1789    struct gl_transform_feedback_varying_info *Varyings;
1790    GLint NumVarying;
1791
1792    /**
1793     * Total number of components stored in each buffer.  This may be used by
1794     * hardware back-ends to determine the correct stride when interleaving
1795     * multiple transform feedback outputs in the same buffer.
1796     */
1797    unsigned BufferStride[MAX_FEEDBACK_BUFFERS];
1798 };
1799
1800
1801 /**
1802  * Transform feedback object state
1803  */
1804 struct gl_transform_feedback_object
1805 {
1806    GLuint Name;  /**< AKA the object ID */
1807    GLint RefCount;
1808    GLboolean Active;  /**< Is transform feedback enabled? */
1809    GLboolean Paused;  /**< Is transform feedback paused? */
1810    GLboolean EndedAnytime; /**< Has EndTransformFeedback been called
1811                                 at least once? */
1812
1813    /** The feedback buffers */
1814    GLuint BufferNames[MAX_FEEDBACK_BUFFERS];
1815    struct gl_buffer_object *Buffers[MAX_FEEDBACK_BUFFERS];
1816
1817    /** Start of feedback data in dest buffer */
1818    GLintptr Offset[MAX_FEEDBACK_BUFFERS];
1819    /** Max data to put into dest buffer (in bytes) */
1820    GLsizeiptr Size[MAX_FEEDBACK_BUFFERS];
1821 };
1822
1823
1824 /**
1825  * Context state for transform feedback.
1826  */
1827 struct gl_transform_feedback_state
1828 {
1829    GLenum Mode;       /**< GL_POINTS, GL_LINES or GL_TRIANGLES */
1830
1831    /** The general binding point (GL_TRANSFORM_FEEDBACK_BUFFER) */
1832    struct gl_buffer_object *CurrentBuffer;
1833
1834    /** The table of all transform feedback objects */
1835    struct _mesa_HashTable *Objects;
1836
1837    /** The current xform-fb object (GL_TRANSFORM_FEEDBACK_BINDING) */
1838    struct gl_transform_feedback_object *CurrentObject;
1839
1840    /** The default xform-fb object (Name==0) */
1841    struct gl_transform_feedback_object *DefaultObject;
1842 };
1843
1844
1845 /**
1846  * Names of the various vertex/fragment program register files, etc.
1847  *
1848  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1849  * All values should fit in a 4-bit field.
1850  *
1851  * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
1852  * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
1853  * be "uniform" variables since they can only be set outside glBegin/End.
1854  * They're also all stored in the same Parameters array.
1855  */
1856 typedef enum
1857 {
1858    PROGRAM_TEMPORARY,   /**< machine->Temporary[] */
1859    PROGRAM_INPUT,       /**< machine->Inputs[] */
1860    PROGRAM_OUTPUT,      /**< machine->Outputs[] */
1861    PROGRAM_VARYING,     /**< machine->Inputs[]/Outputs[] */
1862    PROGRAM_LOCAL_PARAM, /**< gl_program->LocalParams[] */
1863    PROGRAM_ENV_PARAM,   /**< gl_program->Parameters[] */
1864    PROGRAM_STATE_VAR,   /**< gl_program->Parameters[] */
1865    PROGRAM_NAMED_PARAM, /**< gl_program->Parameters[] */
1866    PROGRAM_CONSTANT,    /**< gl_program->Parameters[] */
1867    PROGRAM_UNIFORM,     /**< gl_program->Parameters[] */
1868    PROGRAM_WRITE_ONLY,  /**< A dummy, write-only register */
1869    PROGRAM_ADDRESS,     /**< machine->AddressReg */
1870    PROGRAM_SAMPLER,     /**< for shader samplers, compile-time only */
1871    PROGRAM_SYSTEM_VALUE,/**< InstanceId, PrimitiveID, etc. */
1872    PROGRAM_UNDEFINED,   /**< Invalid/TBD value */
1873    PROGRAM_FILE_MAX
1874 } gl_register_file;
1875
1876
1877 /**
1878  * If the register file is PROGRAM_SYSTEM_VALUE, the register index will be
1879  * one of these values.
1880  */
1881 typedef enum
1882 {
1883    SYSTEM_VALUE_FRONT_FACE,  /**< Fragment shader only (not done yet) */
1884    SYSTEM_VALUE_VERTEX_ID,   /**< Vertex shader only */
1885    SYSTEM_VALUE_INSTANCE_ID, /**< Vertex shader only */
1886    SYSTEM_VALUE_MAX          /**< Number of values */
1887 } gl_system_value;
1888
1889
1890 /**
1891  * The possible interpolation qualifiers that can be applied to a fragment
1892  * shader input in GLSL.
1893  *
1894  * Note: INTERP_QUALIFIER_NONE must be 0 so that memsetting the
1895  * gl_fragment_program data structure to 0 causes the default behavior.
1896  */
1897 enum glsl_interp_qualifier
1898 {
1899    INTERP_QUALIFIER_NONE = 0,
1900    INTERP_QUALIFIER_SMOOTH,
1901    INTERP_QUALIFIER_FLAT,
1902    INTERP_QUALIFIER_NOPERSPECTIVE
1903 };
1904
1905
1906 /**
1907  * \brief Layout qualifiers for gl_FragDepth.
1908  *
1909  * Extension AMD_conservative_depth allows gl_FragDepth to be redeclared with
1910  * a layout qualifier.
1911  *
1912  * \see enum ir_depth_layout
1913  */
1914 enum gl_frag_depth_layout
1915 {
1916    FRAG_DEPTH_LAYOUT_NONE, /**< No layout is specified. */
1917    FRAG_DEPTH_LAYOUT_ANY,
1918    FRAG_DEPTH_LAYOUT_GREATER,
1919    FRAG_DEPTH_LAYOUT_LESS,
1920    FRAG_DEPTH_LAYOUT_UNCHANGED
1921 };
1922
1923
1924 /**
1925  * Base class for any kind of program object
1926  */
1927 struct gl_program
1928 {
1929    GLuint Id;
1930    GLubyte *String;  /**< Null-terminated program text */
1931    GLint RefCount;
1932    GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
1933    GLenum Format;    /**< String encoding format */
1934    GLboolean Resident;
1935
1936    struct prog_instruction *Instructions;
1937
1938    GLbitfield64 InputsRead;     /**< Bitmask of which input regs are read */
1939    GLbitfield64 OutputsWritten; /**< Bitmask of which output regs are written */
1940    GLbitfield SystemValuesRead;   /**< Bitmask of SYSTEM_VALUE_x inputs used */
1941    GLbitfield InputFlags[MAX_PROGRAM_INPUTS];   /**< PROG_PARAM_BIT_x flags */
1942    GLbitfield OutputFlags[MAX_PROGRAM_OUTPUTS]; /**< PROG_PARAM_BIT_x flags */
1943    GLbitfield TexturesUsed[MAX_COMBINED_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1944    GLbitfield SamplersUsed;   /**< Bitfield of which samplers are used */
1945    GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */
1946
1947
1948    /** Named parameters, constants, etc. from program text */
1949    struct gl_program_parameter_list *Parameters;
1950    /** Numbered local parameters */
1951    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1952
1953    /** Map from sampler unit to texture unit (set by glUniform1i()) */
1954    GLubyte SamplerUnits[MAX_SAMPLERS];
1955
1956    /** Bitmask of which register files are read/written with indirect
1957     * addressing.  Mask of (1 << PROGRAM_x) bits.
1958     */
1959    GLbitfield IndirectRegisterFiles;
1960
1961    /** Logical counts */
1962    /*@{*/
1963    GLuint NumInstructions;
1964    GLuint NumTemporaries;
1965    GLuint NumParameters;
1966    GLuint NumAttributes;
1967    GLuint NumAddressRegs;
1968    GLuint NumAluInstructions;
1969    GLuint NumTexInstructions;
1970    GLuint NumTexIndirections;
1971    /*@}*/
1972    /** Native, actual h/w counts */
1973    /*@{*/
1974    GLuint NumNativeInstructions;
1975    GLuint NumNativeTemporaries;
1976    GLuint NumNativeParameters;
1977    GLuint NumNativeAttributes;
1978    GLuint NumNativeAddressRegs;
1979    GLuint NumNativeAluInstructions;
1980    GLuint NumNativeTexInstructions;
1981    GLuint NumNativeTexIndirections;
1982    /*@}*/
1983 };
1984
1985
1986 /** Vertex program object */
1987 struct gl_vertex_program
1988 {
1989    struct gl_program Base;   /**< base class */
1990    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1991    GLboolean IsPositionInvariant;
1992    GLboolean UsesClipDistance;
1993 };
1994
1995
1996 /** Geometry program object */
1997 struct gl_geometry_program
1998 {
1999    struct gl_program Base;   /**< base class */
2000
2001    GLint VerticesOut;
2002    GLenum InputType;  /**< GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_ARB,
2003                            GL_TRIANGLES, or GL_TRIANGLES_ADJACENCY_ARB */
2004    GLenum OutputType; /**< GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP */
2005 };
2006
2007
2008 /** Fragment program object */
2009 struct gl_fragment_program
2010 {
2011    struct gl_program Base;   /**< base class */
2012    GLboolean UsesKill;          /**< shader uses KIL instruction */
2013    GLboolean UsesDFdy;          /**< shader uses DDY instruction */
2014    GLboolean OriginUpperLeft;
2015    GLboolean PixelCenterInteger;
2016    enum gl_frag_depth_layout FragDepthLayout;
2017
2018    /**
2019     * GLSL interpolation qualifier associated with each fragment shader input.
2020     * For inputs that do not have an interpolation qualifier specified in
2021     * GLSL, the value is INTERP_QUALIFIER_NONE.
2022     */
2023    enum glsl_interp_qualifier InterpQualifier[FRAG_ATTRIB_MAX];
2024
2025    /**
2026     * Bitfield indicating, for each fragment shader input, 1 if that input
2027     * uses centroid interpolation, 0 otherwise.  Unused inputs are 0.
2028     */
2029    GLbitfield64 IsCentroid;
2030 };
2031
2032
2033 /**
2034  * State common to vertex and fragment programs.
2035  */
2036 struct gl_program_state
2037 {
2038    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
2039    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
2040 };
2041
2042
2043 /**
2044  * Context state for vertex programs.
2045  */
2046 struct gl_vertex_program_state
2047 {
2048    GLboolean Enabled;            /**< User-set GL_VERTEX_PROGRAM_ARB/NV flag */
2049    GLboolean _Enabled;           /**< Enabled and _valid_ user program? */
2050    GLboolean PointSizeEnabled;   /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
2051    GLboolean TwoSideEnabled;     /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
2052    /** Computed two sided lighting for fixed function/programs. */
2053    GLboolean _TwoSideEnabled;
2054    struct gl_vertex_program *Current;  /**< User-bound vertex program */
2055
2056    /** Currently enabled and valid vertex program (including internal
2057     * programs, user-defined vertex programs and GLSL vertex shaders).
2058     * This is the program we must use when rendering.
2059     */
2060    struct gl_vertex_program *_Current;
2061
2062    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
2063
2064    /* For GL_NV_vertex_program only: */
2065    GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
2066    GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];
2067
2068    /** Should fixed-function T&L be implemented with a vertex prog? */
2069    GLboolean _MaintainTnlProgram;
2070
2071    /** Program to emulate fixed-function T&L (see above) */
2072    struct gl_vertex_program *_TnlProgram;
2073
2074    /** Cache of fixed-function programs */
2075    struct gl_program_cache *Cache;
2076
2077    GLboolean _Overriden;
2078 };
2079
2080
2081 /**
2082  * Context state for geometry programs.
2083  */
2084 struct gl_geometry_program_state
2085 {
2086    GLboolean Enabled;               /**< GL_ARB_GEOMETRY_SHADER4 */
2087    GLboolean _Enabled;              /**< Enabled and valid program? */
2088    struct gl_geometry_program *Current;  /**< user-bound geometry program */
2089
2090    /** Currently enabled and valid program (including internal programs
2091     * and compiled shader programs).
2092     */
2093    struct gl_geometry_program *_Current;
2094
2095    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
2096
2097    /** Cache of fixed-function programs */
2098    struct gl_program_cache *Cache;
2099 };
2100
2101 /**
2102  * Context state for fragment programs.
2103  */
2104 struct gl_fragment_program_state
2105 {
2106    GLboolean Enabled;     /**< User-set fragment program enable flag */
2107    GLboolean _Enabled;    /**< Enabled and _valid_ user program? */
2108    struct gl_fragment_program *Current;  /**< User-bound fragment program */
2109
2110    /** Currently enabled and valid fragment program (including internal
2111     * programs, user-defined fragment programs and GLSL fragment shaders).
2112     * This is the program we must use when rendering.
2113     */
2114    struct gl_fragment_program *_Current;
2115
2116    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
2117
2118    /** Should fixed-function texturing be implemented with a fragment prog? */
2119    GLboolean _MaintainTexEnvProgram;
2120
2121    /** Program to emulate fixed-function texture env/combine (see above) */
2122    struct gl_fragment_program *_TexEnvProgram;
2123
2124    /** Cache of fixed-function programs */
2125    struct gl_program_cache *Cache;
2126 };
2127
2128
2129 /**
2130  * ATI_fragment_shader runtime state
2131  */
2132 #define ATI_FS_INPUT_PRIMARY 0
2133 #define ATI_FS_INPUT_SECONDARY 1
2134
2135 struct atifs_instruction;
2136 struct atifs_setupinst;
2137
2138 /**
2139  * ATI fragment shader
2140  */
2141 struct ati_fragment_shader
2142 {
2143    GLuint Id;
2144    GLint RefCount;
2145    struct atifs_instruction *Instructions[2];
2146    struct atifs_setupinst *SetupInst[2];
2147    GLfloat Constants[8][4];
2148    GLbitfield LocalConstDef;  /**< Indicates which constants have been set */
2149    GLubyte numArithInstr[2];
2150    GLubyte regsAssigned[2];
2151    GLubyte NumPasses;         /**< 1 or 2 */
2152    GLubyte cur_pass;
2153    GLubyte last_optype;
2154    GLboolean interpinp1;
2155    GLboolean isValid;
2156    GLuint swizzlerq;
2157 };
2158
2159 /**
2160  * Context state for GL_ATI_fragment_shader
2161  */
2162 struct gl_ati_fragment_shader_state
2163 {
2164    GLboolean Enabled;
2165    GLboolean _Enabled;                  /**< enabled and valid shader? */
2166    GLboolean Compiling;
2167    GLfloat GlobalConstants[8][4];
2168    struct ati_fragment_shader *Current;
2169 };
2170
2171
2172 /** Set by #pragma directives */
2173 struct gl_sl_pragmas
2174 {
2175    GLboolean IgnoreOptimize;  /**< ignore #pragma optimize(on/off) ? */
2176    GLboolean IgnoreDebug;     /**< ignore #pragma debug(on/off) ? */
2177    GLboolean Optimize;  /**< defaults on */
2178    GLboolean Debug;     /**< defaults off */
2179 };
2180
2181
2182 /**
2183  * A GLSL vertex or fragment shader object.
2184  */
2185 struct gl_shader
2186 {
2187    GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER || GL_GEOMETRY_SHADER_ARB (first field!) */
2188    GLuint Name;  /**< AKA the handle */
2189    GLint RefCount;  /**< Reference count */
2190    GLboolean DeletePending;
2191    GLboolean CompileStatus;
2192    const GLchar *Source;  /**< Source code string */
2193    GLuint SourceChecksum;       /**< for debug/logging purposes */
2194    struct gl_program *Program;  /**< Post-compile assembly code */
2195    GLchar *InfoLog;
2196    struct gl_sl_pragmas Pragmas;
2197
2198    unsigned Version;       /**< GLSL version used for linking */
2199
2200    /**
2201     * \name Sampler tracking
2202     *
2203     * \note Each of these fields is only set post-linking.
2204     */
2205    /*@{*/
2206    unsigned num_samplers;       /**< Number of samplers used by this shader. */
2207    GLbitfield active_samplers;  /**< Bitfield of which samplers are used */
2208    GLbitfield shadow_samplers;  /**< Samplers used for shadow sampling. */
2209    /*@}*/
2210
2211    /**
2212     * Number of uniform components used by this shader.
2213     *
2214     * This field is only set post-linking.
2215     */
2216    unsigned num_uniform_components;
2217
2218    /**
2219     * This shader's uniform block information.
2220     *
2221     * The offsets of the variables are assigned only for shaders in a program's
2222     * _LinkedShaders[].
2223     */
2224    struct gl_uniform_block *UniformBlocks;
2225    unsigned NumUniformBlocks;
2226
2227    struct exec_list *ir;
2228    struct glsl_symbol_table *symbols;
2229
2230    /** Shaders containing built-in functions that are used for linking. */
2231    struct gl_shader *builtins_to_link[16];
2232    unsigned num_builtins_to_link;
2233 };
2234
2235
2236 /**
2237  * Shader stages. Note that these will become 5 with tessellation.
2238  * These MUST have the same values as gallium's PIPE_SHADER_*
2239  */
2240 typedef enum
2241 {
2242    MESA_SHADER_VERTEX = 0,
2243    MESA_SHADER_FRAGMENT = 1,
2244    MESA_SHADER_GEOMETRY = 2,
2245    MESA_SHADER_TYPES = 3
2246 } gl_shader_type;
2247
2248 struct gl_uniform_buffer_variable
2249 {
2250    char *Name;
2251    const struct glsl_type *Type;
2252    unsigned int Buffer;
2253    unsigned int Offset;
2254    GLboolean RowMajor;
2255 };
2256
2257 struct gl_uniform_block
2258 {
2259    /** Declared name of the uniform block */
2260    char *Name;
2261
2262    /** Array of supplemental information about UBO ir_variables. */
2263    struct gl_uniform_buffer_variable *Uniforms;
2264    GLuint NumUniforms;
2265
2266    /**
2267     * Index (GL_UNIFORM_BLOCK_BINDING) into ctx->UniformBufferBindings[] to use
2268     * with glBindBufferBase to bind a buffer object to this uniform block.  When
2269     * updated in the program, _NEW_BUFFER_OBJECT will be set.
2270     */
2271    GLuint Binding;
2272
2273    /**
2274     * Minimum size of a buffer object to back this uniform buffer
2275     * (GL_UNIFORM_BLOCK_DATA_SIZE).
2276     */
2277    GLuint UniformBufferSize;
2278 };
2279
2280 /**
2281  * A GLSL program object.
2282  * Basically a linked collection of vertex and fragment shaders.
2283  */
2284 struct gl_shader_program
2285 {
2286    GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
2287    GLuint Name;  /**< aka handle or ID */
2288    GLint RefCount;  /**< Reference count */
2289    GLboolean DeletePending;
2290
2291    /**
2292     * Flags that the linker should not reject the program if it lacks
2293     * a vertex or fragment shader.  GLES2 doesn't allow separate
2294     * shader objects, and would reject them.  However, we internally
2295     * build separate shader objects for fixed function programs, which
2296     * we use for drivers/common/meta.c and for handling
2297     * _mesa_update_state with no program bound (for example in
2298     * glClear()).
2299     */
2300    GLboolean InternalSeparateShader;
2301
2302    GLuint NumShaders;          /**< number of attached shaders */
2303    struct gl_shader **Shaders; /**< List of attached the shaders */
2304
2305    /**
2306     * User-defined attribute bindings
2307     *
2308     * These are set via \c glBindAttribLocation and are used to direct the
2309     * GLSL linker.  These are \b not the values used in the compiled shader,
2310     * and they are \b not the values returned by \c glGetAttribLocation.
2311     */
2312    struct string_to_uint_map *AttributeBindings;
2313
2314    /**
2315     * User-defined fragment data bindings
2316     *
2317     * These are set via \c glBindFragDataLocation and are used to direct the
2318     * GLSL linker.  These are \b not the values used in the compiled shader,
2319     * and they are \b not the values returned by \c glGetFragDataLocation.
2320     */
2321    struct string_to_uint_map *FragDataBindings;
2322    struct string_to_uint_map *FragDataIndexBindings;
2323
2324    /**
2325     * Transform feedback varyings last specified by
2326     * glTransformFeedbackVaryings().
2327     *
2328     * For the current set of transform feeedback varyings used for transform
2329     * feedback output, see LinkedTransformFeedback.
2330     */
2331    struct {
2332       GLenum BufferMode;
2333       GLuint NumVarying;
2334       GLchar **VaryingNames;  /**< Array [NumVarying] of char * */
2335    } TransformFeedback;
2336
2337    /** Post-link transform feedback info. */
2338    struct gl_transform_feedback_info LinkedTransformFeedback;
2339
2340    /** Post-link gl_FragDepth layout for ARB_conservative_depth. */
2341    enum gl_frag_depth_layout FragDepthLayout;
2342
2343    /** Geometry shader state - copied into gl_geometry_program at link time */
2344    struct {
2345       GLint VerticesOut;
2346       GLenum InputType;  /**< GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_ARB,
2347                               GL_TRIANGLES, or GL_TRIANGLES_ADJACENCY_ARB */
2348       GLenum OutputType; /**< GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP */
2349    } Geom;
2350
2351    /** Vertex shader state - copied into gl_vertex_program at link time */
2352    struct {
2353       GLboolean UsesClipDistance; /**< True if gl_ClipDistance is written to. */
2354       GLuint ClipDistanceArraySize; /**< Size of the gl_ClipDistance array, or
2355                                          0 if not present. */
2356    } Vert;
2357
2358    /* post-link info: */
2359    unsigned NumUserUniformStorage;
2360    struct gl_uniform_storage *UniformStorage;
2361
2362    struct gl_uniform_block *UniformBlocks;
2363    unsigned NumUniformBlocks;
2364
2365    /**
2366     * Indices into the _LinkedShaders's UniformBlocks[] array for each stage
2367     * they're used in, or -1.
2368     *
2369     * This is used to maintain the Binding values of the stage's UniformBlocks[]
2370     * and to answer the GL_UNIFORM_BLOCK_REFERENCED_BY_*_SHADER queries.
2371     */
2372    int *UniformBlockStageIndex[MESA_SHADER_TYPES];
2373
2374    /**
2375     * Map of active uniform names to locations
2376     *
2377     * Maps any active uniform that is not an array element to a location.
2378     * Each active uniform, including individual structure members will appear
2379     * in this map.  This roughly corresponds to the set of names that would be
2380     * enumerated by \c glGetActiveUniform.
2381     */
2382    struct string_to_uint_map *UniformHash;
2383
2384    /**
2385     * Map from sampler unit to texture unit (set by glUniform1i())
2386     *
2387     * A sampler unit is associated with each sampler uniform by the linker.
2388     * The sampler unit associated with each uniform is stored in the
2389     * \c gl_uniform_storage::sampler field.
2390     */
2391    GLubyte SamplerUnits[MAX_SAMPLERS];
2392    /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
2393    gl_texture_index SamplerTargets[MAX_SAMPLERS];
2394
2395    GLboolean LinkStatus;   /**< GL_LINK_STATUS */
2396    GLboolean Validated;
2397    GLboolean _Used;        /**< Ever used for drawing? */
2398    GLchar *InfoLog;
2399
2400    unsigned Version;       /**< GLSL version used for linking */
2401
2402    /**
2403     * Per-stage shaders resulting from the first stage of linking.
2404     *
2405     * Set of linked shaders for this program.  The array is accessed using the
2406     * \c MESA_SHADER_* defines.  Entries for non-existent stages will be
2407     * \c NULL.
2408     */
2409    struct gl_shader *_LinkedShaders[MESA_SHADER_TYPES];
2410 };
2411
2412
2413 #define GLSL_DUMP      0x1  /**< Dump shaders to stdout */
2414 #define GLSL_LOG       0x2  /**< Write shaders to files */
2415 #define GLSL_OPT       0x4  /**< Force optimizations (override pragmas) */
2416 #define GLSL_NO_OPT    0x8  /**< Force no optimizations (override pragmas) */
2417 #define GLSL_UNIFORMS 0x10  /**< Print glUniform calls */
2418 #define GLSL_NOP_VERT 0x20  /**< Force no-op vertex shaders */
2419 #define GLSL_NOP_FRAG 0x40  /**< Force no-op fragment shaders */
2420 #define GLSL_USE_PROG 0x80  /**< Log glUseProgram calls */
2421 #define GLSL_REPORT_ERRORS 0x100  /**< Print compilation errors */
2422
2423
2424 /**
2425  * Context state for GLSL vertex/fragment shaders.
2426  */
2427 struct gl_shader_state
2428 {
2429    /**
2430     * Programs used for rendering
2431     *
2432     * There is a separate program set for each shader stage.  If
2433     * GL_EXT_separate_shader_objects is not supported, each of these must point
2434     * to \c NULL or to the same program.
2435     */
2436    struct gl_shader_program *CurrentVertexProgram;
2437    struct gl_shader_program *CurrentGeometryProgram;
2438    struct gl_shader_program *CurrentFragmentProgram;
2439
2440    struct gl_shader_program *_CurrentFragmentProgram;
2441
2442    /**
2443     * Program used by glUniform calls.
2444     *
2445     * Explicitly set by \c glUseProgram and \c glActiveProgramEXT.
2446     */
2447    struct gl_shader_program *ActiveProgram;
2448
2449    GLbitfield Flags;                    /**< Mask of GLSL_x flags */
2450 };
2451
2452
2453 /**
2454  * Compiler options for a single GLSL shaders type
2455  */
2456 struct gl_shader_compiler_options
2457 {
2458    /** Driver-selectable options: */
2459    GLboolean EmitCondCodes;             /**< Use condition codes? */
2460    GLboolean EmitNVTempInitialization;  /**< 0-fill NV temp registers */
2461    GLboolean EmitNoLoops;
2462    GLboolean EmitNoFunctions;
2463    GLboolean EmitNoCont;                  /**< Emit CONT opcode? */
2464    GLboolean EmitNoMainReturn;            /**< Emit CONT/RET opcodes? */
2465    GLboolean EmitNoNoise;                 /**< Emit NOISE opcodes? */
2466    GLboolean EmitNoPow;                   /**< Emit POW opcodes? */
2467    GLboolean LowerClipDistance; /**< Lower gl_ClipDistance from float[8] to vec4[2]? */
2468
2469    /**
2470     * \name Forms of indirect addressing the driver cannot do.
2471     */
2472    /*@{*/
2473    GLboolean EmitNoIndirectInput;   /**< No indirect addressing of inputs */
2474    GLboolean EmitNoIndirectOutput;  /**< No indirect addressing of outputs */
2475    GLboolean EmitNoIndirectTemp;    /**< No indirect addressing of temps */
2476    GLboolean EmitNoIndirectUniform; /**< No indirect addressing of constants */
2477    /*@}*/
2478
2479    GLuint MaxIfDepth;               /**< Maximum nested IF blocks */
2480    GLuint MaxUnrollIterations;
2481
2482    struct gl_sl_pragmas DefaultPragmas; /**< Default #pragma settings */
2483 };
2484
2485
2486 /**
2487  * Occlusion/timer query object.
2488  */
2489 struct gl_query_object
2490 {
2491    GLenum Target;      /**< The query target, when active */
2492    GLuint Id;          /**< hash table ID/name */
2493    GLuint64EXT Result; /**< the counter */
2494    GLboolean Active;   /**< inside Begin/EndQuery */
2495    GLboolean Ready;    /**< result is ready? */
2496 };
2497
2498
2499 /**
2500  * Context state for query objects.
2501  */
2502 struct gl_query_state
2503 {
2504    struct _mesa_HashTable *QueryObjects;
2505    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2506    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2507
2508    /** GL_NV_conditional_render */
2509    struct gl_query_object *CondRenderQuery;
2510
2511    /** GL_EXT_transform_feedback */
2512    struct gl_query_object *PrimitivesGenerated;
2513    struct gl_query_object *PrimitivesWritten;
2514
2515    /** GL_ARB_timer_query */
2516    struct gl_query_object *TimeElapsed;
2517
2518    GLenum CondRenderMode;
2519 };
2520
2521
2522 /** Sync object state */
2523 struct gl_sync_object
2524 {
2525    struct simple_node link;
2526    GLenum Type;               /**< GL_SYNC_FENCE */
2527    GLuint Name;               /**< Fence name */
2528    GLint RefCount;            /**< Reference count */
2529    GLboolean DeletePending;   /**< Object was deleted while there were still
2530                                * live references (e.g., sync not yet finished)
2531                                */
2532    GLenum SyncCondition;
2533    GLbitfield Flags;          /**< Flags passed to glFenceSync */
2534    GLuint StatusFlag:1;       /**< Has the sync object been signaled? */
2535 };
2536
2537
2538 /**
2539  * State which can be shared by multiple contexts:
2540  */
2541 struct gl_shared_state
2542 {
2543    _glthread_Mutex Mutex;                  /**< for thread safety */
2544    GLint RefCount;                         /**< Reference count */
2545    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2546    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2547
2548    /** Default texture objects (shared by all texture units) */
2549    struct gl_texture_object *DefaultTex[NUM_TEXTURE_TARGETS];
2550
2551    /** Fallback texture used when a bound texture is incomplete */
2552    struct gl_texture_object *FallbackTex[NUM_TEXTURE_TARGETS];
2553
2554    /**
2555     * \name Thread safety and statechange notification for texture
2556     * objects.
2557     *
2558     * \todo Improve the granularity of locking.
2559     */
2560    /*@{*/
2561    _glthread_Mutex TexMutex;            /**< texobj thread safety */
2562    GLuint TextureStateStamp;            /**< state notification for shared tex */
2563    /*@}*/
2564
2565    /** Default buffer object for vertex arrays that aren't in VBOs */
2566    struct gl_buffer_object *NullBufferObj;
2567
2568    /**
2569     * \name Vertex/geometry/fragment programs
2570     */
2571    /*@{*/
2572    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2573    struct gl_vertex_program *DefaultVertexProgram;
2574    struct gl_fragment_program *DefaultFragmentProgram;
2575    struct gl_geometry_program *DefaultGeometryProgram;
2576    /*@}*/
2577
2578    /* GL_ATI_fragment_shader */
2579    struct _mesa_HashTable *ATIShaders;
2580    struct ati_fragment_shader *DefaultFragmentShader;
2581
2582    struct _mesa_HashTable *BufferObjects;
2583
2584    /** Table of both gl_shader and gl_shader_program objects */
2585    struct _mesa_HashTable *ShaderObjects;
2586
2587    /* GL_EXT_framebuffer_object */
2588    struct _mesa_HashTable *RenderBuffers;
2589    struct _mesa_HashTable *FrameBuffers;
2590
2591    /* GL_ARB_sync */
2592    struct simple_node SyncObjects;
2593
2594    /** GL_ARB_sampler_objects */
2595    struct _mesa_HashTable *SamplerObjects;
2596 };
2597
2598
2599
2600 /**
2601  * Renderbuffers represent drawing surfaces such as color, depth and/or
2602  * stencil.  A framebuffer object has a set of renderbuffers.
2603  * Drivers will typically derive subclasses of this type.
2604  */
2605 struct gl_renderbuffer
2606 {
2607    _glthread_Mutex Mutex; /**< for thread safety */
2608    GLuint ClassID;        /**< Useful for drivers */
2609    GLuint Name;
2610    GLint RefCount;
2611    GLuint Width, Height;
2612    GLboolean Purgeable;  /**< Is the buffer purgeable under memory pressure? */
2613    GLboolean AttachedAnytime; /**< TRUE if it was attached to a framebuffer */
2614    GLubyte NumSamples;
2615    GLenum InternalFormat; /**< The user-specified format */
2616    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2617                                GL_STENCIL_INDEX. */
2618    gl_format Format;      /**< The actual renderbuffer memory format */
2619
2620    /** Delete this renderbuffer */
2621    void (*Delete)(struct gl_renderbuffer *rb);
2622
2623    /** Allocate new storage for this renderbuffer */
2624    GLboolean (*AllocStorage)(struct gl_context *ctx,
2625                              struct gl_renderbuffer *rb,
2626                              GLenum internalFormat,
2627                              GLuint width, GLuint height);
2628 };
2629
2630
2631 /**
2632  * A renderbuffer attachment points to either a texture object (and specifies
2633  * a mipmap level, cube face or 3D texture slice) or points to a renderbuffer.
2634  */
2635 struct gl_renderbuffer_attachment
2636 {
2637    GLenum Type;  /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
2638    GLboolean Complete;
2639
2640    /**
2641     * If \c Type is \c GL_RENDERBUFFER_EXT, this stores a pointer to the
2642     * application supplied renderbuffer object.
2643     */
2644    struct gl_renderbuffer *Renderbuffer;
2645
2646    /**
2647     * If \c Type is \c GL_TEXTURE, this stores a pointer to the application
2648     * supplied texture object.
2649     */
2650    struct gl_texture_object *Texture;
2651    GLuint TextureLevel; /**< Attached mipmap level. */
2652    GLuint CubeMapFace;  /**< 0 .. 5, for cube map textures. */
2653    GLuint Zoffset;      /**< Slice for 3D textures,  or layer for both 1D
2654                          * and 2D array textures */
2655 };
2656
2657
2658 /**
2659  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2660  * In C++ terms, think of this as a base class from which device drivers
2661  * will make derived classes.
2662  */
2663 struct gl_framebuffer
2664 {
2665    _glthread_Mutex Mutex;  /**< for thread safety */
2666    /**
2667     * If zero, this is a window system framebuffer.  If non-zero, this
2668     * is a FBO framebuffer; note that for some devices (i.e. those with
2669     * a natural pixel coordinate system for FBOs that differs from the
2670     * OpenGL/Mesa coordinate system), this means that the viewport,
2671     * polygon face orientation, and polygon stipple will have to be inverted.
2672     */
2673    GLuint Name;
2674
2675    GLint RefCount;
2676    GLboolean DeletePending;
2677
2678    /**
2679     * The framebuffer's visual. Immutable if this is a window system buffer.
2680     * Computed from attachments if user-made FBO.
2681     */
2682    struct gl_config Visual;
2683
2684    GLboolean Initialized;
2685
2686    GLuint Width, Height;        /**< size of frame buffer in pixels */
2687
2688    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2689    /*@{*/
2690    GLint _Xmin, _Xmax;  /**< inclusive */
2691    GLint _Ymin, _Ymax;  /**< exclusive */
2692    /*@}*/
2693
2694    /** \name  Derived Z buffer stuff */
2695    /*@{*/
2696    GLuint _DepthMax;    /**< Max depth buffer value */
2697    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2698    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2699    /*@}*/
2700
2701    /** One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2702    GLenum _Status;
2703
2704    /** Integer color values */
2705    GLboolean _IntegerColor;
2706
2707    /** Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2708    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2709
2710    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2711     * attribute group and GL_PIXEL attribute group, respectively.
2712     */
2713    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2714    GLenum ColorReadBuffer;
2715
2716    /** Computed from ColorDraw/ReadBuffer above */
2717    GLuint _NumColorDrawBuffers;
2718    GLint _ColorDrawBufferIndexes[MAX_DRAW_BUFFERS]; /**< BUFFER_x or -1 */
2719    GLint _ColorReadBufferIndex; /* -1 = None */
2720    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS];
2721    struct gl_renderbuffer *_ColorReadBuffer;
2722
2723    /** Delete this framebuffer */
2724    void (*Delete)(struct gl_framebuffer *fb);
2725 };
2726
2727
2728 /**
2729  * Precision info for shader datatypes.  See glGetShaderPrecisionFormat().
2730  */
2731 struct gl_precision
2732 {
2733    GLushort RangeMin;   /**< min value exponent */
2734    GLushort RangeMax;   /**< max value exponent */
2735    GLushort Precision;  /**< number of mantissa bits */
2736 };
2737
2738
2739 /**
2740  * Limits for vertex, geometry and fragment programs/shaders.
2741  */
2742 struct gl_program_constants
2743 {
2744    /* logical limits */
2745    GLuint MaxInstructions;
2746    GLuint MaxAluInstructions;
2747    GLuint MaxTexInstructions;
2748    GLuint MaxTexIndirections;
2749    GLuint MaxAttribs;
2750    GLuint MaxTemps;
2751    GLuint MaxAddressRegs;
2752    GLuint MaxAddressOffset;  /**< [-MaxAddressOffset, MaxAddressOffset-1] */
2753    GLuint MaxParameters;
2754    GLuint MaxLocalParams;
2755    GLuint MaxEnvParams;
2756    /* native/hardware limits */
2757    GLuint MaxNativeInstructions;
2758    GLuint MaxNativeAluInstructions;
2759    GLuint MaxNativeTexInstructions;
2760    GLuint MaxNativeTexIndirections;
2761    GLuint MaxNativeAttribs;
2762    GLuint MaxNativeTemps;
2763    GLuint MaxNativeAddressRegs;
2764    GLuint MaxNativeParameters;
2765    /* For shaders */
2766    GLuint MaxUniformComponents;  /**< Usually == MaxParameters * 4 */
2767    /* ES 2.0 and GL_ARB_ES2_compatibility */
2768    struct gl_precision LowFloat, MediumFloat, HighFloat;
2769    struct gl_precision LowInt, MediumInt, HighInt;
2770    /* GL_ARB_uniform_buffer_object */
2771    GLuint MaxUniformBlocks;
2772    GLuint MaxCombinedUniformComponents;
2773 };
2774
2775
2776 /**
2777  * Constants which may be overridden by device driver during context creation
2778  * but are never changed after that.
2779  */
2780 struct gl_constants
2781 {
2782    GLint MaxTextureMbytes;      /**< Max memory per image, in MB */
2783    GLint MaxTextureLevels;      /**< Max mipmap levels. */
2784    GLint Max3DTextureLevels;    /**< Max mipmap levels for 3D textures */
2785    GLint MaxCubeTextureLevels;  /**< Max mipmap levels for cube textures */
2786    GLint MaxArrayTextureLayers; /**< Max layers in array textures */
2787    GLint MaxTextureRectSize;    /**< Max rectangle texture size, in pixes */
2788    GLuint MaxTextureCoordUnits;
2789    GLuint MaxTextureImageUnits;
2790    GLuint MaxVertexTextureImageUnits;
2791    GLuint MaxCombinedTextureImageUnits;
2792    GLuint MaxGeometryTextureImageUnits;
2793    GLuint MaxTextureUnits;           /**< = MIN(CoordUnits, ImageUnits) */
2794    GLfloat MaxTextureMaxAnisotropy;  /**< GL_EXT_texture_filter_anisotropic */
2795    GLfloat MaxTextureLodBias;        /**< GL_EXT_texture_lod_bias */
2796    GLuint MaxTextureBufferSize;      /**< GL_ARB_texture_buffer_object */
2797
2798    GLuint MaxArrayLockSize;
2799
2800    GLint SubPixelBits;
2801
2802    GLfloat MinPointSize, MaxPointSize;       /**< aliased */
2803    GLfloat MinPointSizeAA, MaxPointSizeAA;   /**< antialiased */
2804    GLfloat PointSizeGranularity;
2805    GLfloat MinLineWidth, MaxLineWidth;       /**< aliased */
2806    GLfloat MinLineWidthAA, MaxLineWidthAA;   /**< antialiased */
2807    GLfloat LineWidthGranularity;
2808
2809    GLuint MaxColorTableSize;
2810
2811    GLuint MaxClipPlanes;
2812    GLuint MaxLights;
2813    GLfloat MaxShininess;                     /**< GL_NV_light_max_exponent */
2814    GLfloat MaxSpotExponent;                  /**< GL_NV_light_max_exponent */
2815
2816    GLuint MaxViewportWidth, MaxViewportHeight;
2817
2818    struct gl_program_constants VertexProgram;   /**< GL_ARB_vertex_program */
2819    struct gl_program_constants FragmentProgram; /**< GL_ARB_fragment_program */
2820    struct gl_program_constants GeometryProgram;  /**< GL_ARB_geometry_shader4 */
2821    GLuint MaxProgramMatrices;
2822    GLuint MaxProgramMatrixStackDepth;
2823
2824    /** vertex array / buffer object bounds checking */
2825    GLboolean CheckArrayBounds;
2826
2827    GLuint MaxDrawBuffers;    /**< GL_ARB_draw_buffers */
2828
2829    GLuint MaxColorAttachments;   /**< GL_EXT_framebuffer_object */
2830    GLuint MaxRenderbufferSize;   /**< GL_EXT_framebuffer_object */
2831    GLuint MaxSamples;            /**< GL_ARB_framebuffer_object */
2832
2833    /** Number of varying vectors between vertex and fragment shaders */
2834    GLuint MaxVarying;
2835    GLuint MaxVertexVaryingComponents;   /**< Between vert and geom shader */
2836    GLuint MaxGeometryVaryingComponents; /**< Between geom and frag shader */
2837
2838    /** @{
2839     * GL_ARB_uniform_buffer_object
2840     */
2841    GLuint MaxCombinedUniformBlocks;
2842    GLuint MaxUniformBufferBindings;
2843    GLuint MaxUniformBlockSize;
2844    GLuint UniformBufferOffsetAlignment;
2845    /** @} */
2846
2847    /** GL_ARB_geometry_shader4 */
2848    GLuint MaxGeometryOutputVertices;
2849    GLuint MaxGeometryTotalOutputComponents;
2850
2851    GLuint GLSLVersion;  /**< GLSL version supported (ex: 120 = 1.20) */
2852
2853    /**
2854     * Changes default GLSL extension behavior from "error" to "warn".  It's out
2855     * of spec, but it can make some apps work that otherwise wouldn't.
2856     */
2857    GLboolean ForceGLSLExtensionsWarn;
2858
2859    /**
2860     * Does the driver support real 32-bit integers?  (Otherwise, integers are
2861     * simulated via floats.)
2862     */
2863    GLboolean NativeIntegers;
2864
2865    /**
2866     * If the driver supports real 32-bit integers, what integer value should be
2867     * used for boolean true in uniform uploads?  (Usually 1 or ~0.)
2868     */
2869    GLuint UniformBooleanTrue;
2870
2871    /** Which texture units support GL_ATI_envmap_bumpmap as targets */
2872    GLbitfield SupportedBumpUnits;
2873
2874    /**
2875     * Maximum amount of time, measured in nanseconds, that the server can wait.
2876     */
2877    GLuint64 MaxServerWaitTimeout;
2878
2879    /** GL_EXT_provoking_vertex */
2880    GLboolean QuadsFollowProvokingVertexConvention;
2881
2882    /** OpenGL version 3.0 */
2883    GLbitfield ContextFlags;  /**< Ex: GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT */
2884
2885    /** OpenGL version 3.2 */
2886    GLbitfield ProfileMask;   /**< Mask of CONTEXT_x_PROFILE_BIT */
2887
2888    /** GL_EXT_transform_feedback */
2889    GLuint MaxTransformFeedbackBuffers;
2890    GLuint MaxTransformFeedbackSeparateComponents;
2891    GLuint MaxTransformFeedbackInterleavedComponents;
2892    GLuint MaxVertexStreams;
2893
2894    /** GL_EXT_gpu_shader4 */
2895    GLint MinProgramTexelOffset, MaxProgramTexelOffset;
2896
2897    /* GL_ARB_robustness */
2898    GLenum ResetStrategy;
2899
2900    /* GL_ARB_blend_func_extended */
2901    GLuint MaxDualSourceDrawBuffers;
2902
2903    /**
2904     * Whether the implementation strips out and ignores texture borders.
2905     *
2906     * Many GPU hardware implementations don't support rendering with texture
2907     * borders and mipmapped textures.  (Note: not static border color, but the
2908     * old 1-pixel border around each edge).  Implementations then have to do
2909     * slow fallbacks to be correct, or just ignore the border and be fast but
2910     * wrong.  Setting the flag strips the border off of TexImage calls,
2911     * providing "fast but wrong" at significantly reduced driver complexity.
2912     *
2913     * Texture borders are deprecated in GL 3.0.
2914     **/
2915    GLboolean StripTextureBorder;
2916
2917    /**
2918     * For drivers which can do a better job at eliminating unused varyings
2919     * and uniforms than the GLSL compiler.
2920     *
2921     * XXX Remove these as soon as a better solution is available.
2922     */
2923    GLboolean GLSLSkipStrictMaxVaryingLimitCheck;
2924    GLboolean GLSLSkipStrictMaxUniformLimitCheck;
2925
2926    /**
2927     * Force software support for primitive restart in the VBO module.
2928     */
2929    GLboolean PrimitiveRestartInSoftware;
2930 };
2931
2932
2933 /**
2934  * Enable flag for each OpenGL extension.  Different device drivers will
2935  * enable different extensions at runtime.
2936  */
2937 struct gl_extensions
2938 {
2939    GLboolean dummy;  /* don't remove this! */
2940    GLboolean dummy_true;  /* Set true by _mesa_init_extensions(). */
2941    GLboolean dummy_false; /* Set false by _mesa_init_extensions(). */
2942    GLboolean ARB_ES2_compatibility;
2943    GLboolean ARB_base_instance;
2944    GLboolean ARB_blend_func_extended;
2945    GLboolean ARB_color_buffer_float;
2946    GLboolean ARB_conservative_depth;
2947    GLboolean ARB_copy_buffer;
2948    GLboolean ARB_depth_buffer_float;
2949    GLboolean ARB_depth_clamp;
2950    GLboolean ARB_depth_texture;
2951    GLboolean ARB_draw_buffers_blend;
2952    GLboolean ARB_draw_elements_base_vertex;
2953    GLboolean ARB_draw_instanced;
2954    GLboolean ARB_fragment_coord_conventions;
2955    GLboolean ARB_fragment_program;
2956    GLboolean ARB_fragment_program_shadow;
2957    GLboolean ARB_fragment_shader;
2958    GLboolean ARB_framebuffer_object;
2959    GLboolean ARB_explicit_attrib_location;
2960    GLboolean ARB_geometry_shader4;
2961    GLboolean ARB_half_float_pixel;
2962    GLboolean ARB_half_float_vertex;
2963    GLboolean ARB_instanced_arrays;
2964    GLboolean ARB_map_buffer_range;
2965    GLboolean ARB_occlusion_query;
2966    GLboolean ARB_occlusion_query2;
2967    GLboolean ARB_point_sprite;
2968    GLboolean ARB_seamless_cube_map;
2969    GLboolean ARB_shader_bit_encoding;
2970    GLboolean ARB_shader_objects;
2971    GLboolean ARB_shader_stencil_export;
2972    GLboolean ARB_shader_texture_lod;
2973    GLboolean ARB_shading_language_100;
2974    GLboolean ARB_shadow;
2975    GLboolean ARB_shadow_ambient;
2976    GLboolean ARB_sync;
2977    GLboolean ARB_texture_border_clamp;
2978    GLboolean ARB_texture_buffer_object;
2979    GLboolean ARB_texture_compression_rgtc;
2980    GLboolean ARB_texture_cube_map;
2981    GLboolean ARB_texture_env_combine;
2982    GLboolean ARB_texture_env_crossbar;
2983    GLboolean ARB_texture_env_dot3;
2984    GLboolean ARB_texture_float;
2985    GLboolean ARB_texture_multisample;
2986    GLboolean ARB_texture_non_power_of_two;
2987    GLboolean ARB_texture_rg;
2988    GLboolean ARB_texture_rgb10_a2ui;
2989    GLboolean ARB_texture_storage;
2990    GLboolean ARB_timer_query;
2991    GLboolean ARB_transform_feedback2;
2992    GLboolean ARB_transform_feedback3;
2993    GLboolean ARB_transform_feedback_instanced;
2994    GLboolean ARB_transpose_matrix;
2995    GLboolean ARB_uniform_buffer_object;
2996    GLboolean ARB_vertex_array_object;
2997    GLboolean ARB_vertex_program;
2998    GLboolean ARB_vertex_shader;
2999    GLboolean ARB_vertex_type_2_10_10_10_rev;
3000    GLboolean ARB_window_pos;
3001    GLboolean EXT_blend_color;
3002    GLboolean EXT_blend_equation_separate;
3003    GLboolean EXT_blend_func_separate;
3004    GLboolean EXT_blend_minmax;
3005    GLboolean EXT_clip_volume_hint;
3006    GLboolean EXT_compiled_vertex_array;
3007    GLboolean EXT_depth_bounds_test;
3008    GLboolean EXT_draw_buffers2;
3009    GLboolean EXT_draw_range_elements;
3010    GLboolean EXT_fog_coord;
3011    GLboolean EXT_framebuffer_blit;
3012    GLboolean EXT_framebuffer_multisample;
3013    GLboolean EXT_framebuffer_object;
3014    GLboolean EXT_framebuffer_sRGB;
3015    GLboolean EXT_gpu_program_parameters;
3016    GLboolean EXT_gpu_shader4;
3017    GLboolean EXT_packed_depth_stencil;
3018    GLboolean EXT_packed_float;
3019    GLboolean EXT_packed_pixels;
3020    GLboolean EXT_pixel_buffer_object;
3021    GLboolean EXT_point_parameters;
3022    GLboolean EXT_provoking_vertex;
3023    GLboolean EXT_rescale_normal;
3024    GLboolean EXT_shadow_funcs;
3025    GLboolean EXT_secondary_color;
3026    GLboolean EXT_separate_shader_objects;
3027    GLboolean EXT_separate_specular_color;
3028    GLboolean EXT_stencil_two_side;
3029    GLboolean EXT_texture3D;
3030    GLboolean EXT_texture_array;
3031    GLboolean EXT_texture_compression_latc;
3032    GLboolean EXT_texture_compression_s3tc;
3033    GLboolean EXT_texture_env_dot3;
3034    GLboolean EXT_texture_filter_anisotropic;
3035    GLboolean EXT_texture_integer;
3036    GLboolean EXT_texture_mirror_clamp;
3037    GLboolean EXT_texture_shared_exponent;
3038    GLboolean EXT_texture_snorm;
3039    GLboolean EXT_texture_sRGB;
3040    GLboolean EXT_texture_sRGB_decode;
3041    GLboolean EXT_texture_swizzle;
3042    GLboolean EXT_transform_feedback;
3043    GLboolean EXT_timer_query;
3044    GLboolean EXT_vertex_array_bgra;
3045    GLboolean OES_standard_derivatives;
3046    /* vendor extensions */
3047    GLboolean AMD_seamless_cubemap_per_texture;
3048    GLboolean APPLE_packed_pixels;
3049    GLboolean APPLE_vertex_array_object;
3050    GLboolean APPLE_object_purgeable;
3051    GLboolean ATI_envmap_bumpmap;
3052    GLboolean ATI_texture_compression_3dc;
3053    GLboolean ATI_texture_mirror_once;
3054    GLboolean ATI_texture_env_combine3;
3055    GLboolean ATI_fragment_shader;
3056    GLboolean ATI_separate_stencil;
3057    GLboolean IBM_rasterpos_clip;
3058    GLboolean IBM_multimode_draw_arrays;
3059    GLboolean MESA_pack_invert;
3060    GLboolean MESA_resize_buffers;
3061    GLboolean MESA_ycbcr_texture;
3062    GLboolean MESA_texture_array;
3063    GLboolean NV_blend_square;
3064    GLboolean NV_conditional_render;
3065    GLboolean NV_fog_distance;
3066    GLboolean NV_fragment_program;
3067    GLboolean NV_fragment_program_option;
3068    GLboolean NV_light_max_exponent;
3069    GLboolean NV_point_sprite;
3070    GLboolean NV_primitive_restart;
3071    GLboolean NV_read_buffer;
3072    GLboolean NV_texture_barrier;
3073    GLboolean NV_texgen_reflection;
3074    GLboolean NV_texture_env_combine4;
3075    GLboolean NV_texture_rectangle;
3076    GLboolean NV_vertex_program;
3077    GLboolean NV_vertex_program1_1;
3078    GLboolean SGIS_texture_lod;
3079    GLboolean TDFX_texture_compression_FXT1;
3080    GLboolean S3_s3tc;
3081    GLboolean OES_EGL_image;
3082    GLboolean OES_draw_texture;
3083    GLboolean OES_EGL_image_external;
3084    GLboolean OES_compressed_ETC1_RGB8_texture;
3085    GLboolean extension_sentinel;
3086    /** The extension string */
3087    const GLubyte *String;
3088    /** Number of supported extensions */
3089    GLuint Count;
3090 };
3091
3092
3093 /**
3094  * A stack of matrices (projection, modelview, color, texture, etc).
3095  */
3096 struct gl_matrix_stack
3097 {
3098    GLmatrix *Top;      /**< points into Stack */
3099    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
3100    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
3101    GLuint MaxDepth;    /**< size of Stack[] array */
3102    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
3103 };
3104
3105
3106 /**
3107  * \name Bits for image transfer operations
3108  * \sa __struct gl_contextRec::ImageTransferState.
3109  */
3110 /*@{*/
3111 #define IMAGE_SCALE_BIAS_BIT                      0x1
3112 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
3113 #define IMAGE_MAP_COLOR_BIT                       0x4
3114 #define IMAGE_CLAMP_BIT                           0x800
3115
3116
3117 /** Pixel Transfer ops */
3118 #define IMAGE_BITS (IMAGE_SCALE_BIAS_BIT |                      \
3119                     IMAGE_SHIFT_OFFSET_BIT |                    \
3120                     IMAGE_MAP_COLOR_BIT)
3121
3122 /**
3123  * \name Bits to indicate what state has changed.
3124  */
3125 /*@{*/
3126 #define _NEW_MODELVIEW         (1 << 0)   /**< gl_context::ModelView */
3127 #define _NEW_PROJECTION        (1 << 1)   /**< gl_context::Projection */
3128 #define _NEW_TEXTURE_MATRIX    (1 << 2)   /**< gl_context::TextureMatrix */
3129 #define _NEW_COLOR             (1 << 3)   /**< gl_context::Color */
3130 #define _NEW_DEPTH             (1 << 4)   /**< gl_context::Depth */
3131 #define _NEW_EVAL              (1 << 5)   /**< gl_context::Eval, EvalMap */
3132 #define _NEW_FOG               (1 << 6)   /**< gl_context::Fog */
3133 #define _NEW_HINT              (1 << 7)   /**< gl_context::Hint */
3134 #define _NEW_LIGHT             (1 << 8)   /**< gl_context::Light */
3135 #define _NEW_LINE              (1 << 9)   /**< gl_context::Line */
3136 #define _NEW_PIXEL             (1 << 10)  /**< gl_context::Pixel */
3137 #define _NEW_POINT             (1 << 11)  /**< gl_context::Point */
3138 #define _NEW_POLYGON           (1 << 12)  /**< gl_context::Polygon */
3139 #define _NEW_POLYGONSTIPPLE    (1 << 13)  /**< gl_context::PolygonStipple */
3140 #define _NEW_SCISSOR           (1 << 14)  /**< gl_context::Scissor */
3141 #define _NEW_STENCIL           (1 << 15)  /**< gl_context::Stencil */
3142 #define _NEW_TEXTURE           (1 << 16)  /**< gl_context::Texture */
3143 #define _NEW_TRANSFORM         (1 << 17)  /**< gl_context::Transform */
3144 #define _NEW_VIEWPORT          (1 << 18)  /**< gl_context::Viewport */
3145 #define _NEW_PACKUNPACK        (1 << 19)  /**< gl_context::Pack, Unpack */
3146 #define _NEW_ARRAY             (1 << 20)  /**< gl_context::Array */
3147 #define _NEW_RENDERMODE        (1 << 21)  /**< gl_context::RenderMode, etc */
3148 #define _NEW_BUFFERS           (1 << 22)  /**< gl_context::Visual, DrawBuffer, */
3149 #define _NEW_CURRENT_ATTRIB    (1 << 23)  /**< gl_context::Current */
3150 #define _NEW_MULTISAMPLE       (1 << 24)  /**< gl_context::Multisample */
3151 #define _NEW_TRACK_MATRIX      (1 << 25)  /**< gl_context::VertexProgram */
3152 #define _NEW_PROGRAM           (1 << 26)  /**< New program/shader state */
3153 #define _NEW_PROGRAM_CONSTANTS (1 << 27)
3154 #define _NEW_BUFFER_OBJECT     (1 << 28)
3155 #define _NEW_FRAG_CLAMP        (1 << 29)
3156 #define _NEW_TRANSFORM_FEEDBACK (1 << 30) /**< gl_context::TransformFeedback */
3157 #define _NEW_VARYING_VP_INPUTS (1 << 31) /**< gl_context::varying_vp_inputs */
3158 #define _NEW_ALL ~0
3159
3160 /**
3161  * We use _NEW_TRANSFORM for GL_RASTERIZER_DISCARD.  This #define is for
3162  * clarity.
3163  */
3164 #define _NEW_RASTERIZER_DISCARD _NEW_TRANSFORM
3165 /*@}*/
3166
3167
3168 /**
3169  * \name A bunch of flags that we think might be useful to drivers.
3170  *
3171  * Set in the __struct gl_contextRec::_TriangleCaps bitfield.
3172  */
3173 /*@{*/
3174 #define DD_SEPARATE_SPECULAR        (1 << 0)
3175 #define DD_TRI_LIGHT_TWOSIDE        (1 << 1)
3176 #define DD_TRI_UNFILLED             (1 << 2)
3177 #define DD_TRI_SMOOTH               (1 << 3)
3178 #define DD_TRI_STIPPLE              (1 << 4)
3179 #define DD_TRI_OFFSET               (1 << 5)
3180 #define DD_LINE_SMOOTH              (1 << 6)
3181 #define DD_LINE_STIPPLE             (1 << 7)
3182 #define DD_POINT_SMOOTH             (1 << 8)
3183 #define DD_POINT_ATTEN              (1 << 9)
3184 /*@}*/
3185
3186
3187 /**
3188  * Composite state flags
3189  */
3190 /*@{*/
3191 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
3192                                            _NEW_TEXTURE |       \
3193                                            _NEW_POINT |         \
3194                                            _NEW_PROGRAM |       \
3195                                            _NEW_MODELVIEW)
3196
3197 #define _MESA_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | \
3198                                             _NEW_FOG | \
3199                                             _NEW_PROGRAM)
3200
3201
3202 /*@}*/
3203
3204
3205
3206
3207 /* This has to be included here. */
3208 #include "dd.h"
3209
3210
3211 /**
3212  * Display list flags.
3213  * Strictly this is a tnl-private concept, but it doesn't seem
3214  * worthwhile adding a tnl private structure just to hold this one bit
3215  * of information:
3216  */
3217 #define DLIST_DANGLING_REFS     0x1
3218
3219
3220 /** Opaque declaration of display list payload data type */
3221 union gl_dlist_node;
3222
3223
3224 /**
3225  * Provide a location where information about a display list can be
3226  * collected.  Could be extended with driverPrivate structures,
3227  * etc. in the future.
3228  */
3229 struct gl_display_list
3230 {
3231    GLuint Name;
3232    GLbitfield Flags;  /**< DLIST_x flags */
3233    /** The dlist commands are in a linked list of nodes */
3234    union gl_dlist_node *Head;
3235 };
3236
3237
3238 /**
3239  * State used during display list compilation and execution.
3240  */
3241 struct gl_dlist_state
3242 {
3243    GLuint CallDepth;            /**< Current recursion calling depth */
3244
3245    struct gl_display_list *CurrentList; /**< List currently being compiled */
3246    union gl_dlist_node *CurrentBlock; /**< Pointer to current block of nodes */
3247    GLuint CurrentPos;           /**< Index into current block of nodes */
3248
3249    GLvertexformat ListVtxfmt;
3250
3251    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
3252    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
3253
3254    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
3255    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
3256
3257    struct {
3258       /* State known to have been set by the currently-compiling display
3259        * list.  Used to eliminate some redundant state changes.
3260        */
3261       GLenum ShadeModel;
3262    } Current;
3263 };
3264
3265 /**
3266  * An error, warning, or other piece of debug information for an application
3267  * to consume via GL_ARB_debug_output.
3268  */
3269 struct gl_debug_msg
3270 {
3271    GLenum source;
3272    GLenum type;
3273    GLuint id;
3274    GLenum severity;
3275    GLsizei length;
3276    GLcharARB *message;
3277 };
3278
3279 typedef enum {
3280    API_ERROR_UNKNOWN,
3281    API_ERROR_COUNT
3282 } gl_api_error;
3283
3284 typedef enum {
3285    WINSYS_ERROR_UNKNOWN,
3286    WINSYS_ERROR_COUNT
3287 } gl_winsys_error;
3288
3289 typedef enum {
3290    SHADER_ERROR_UNKNOWN,
3291    SHADER_ERROR_COUNT
3292 } gl_shader_error;
3293
3294 typedef enum {
3295    OTHER_ERROR_UNKNOWN,
3296    OTHER_ERROR_OUT_OF_MEMORY,
3297    OTHER_ERROR_COUNT
3298 } gl_other_error;
3299
3300 struct gl_client_namespace
3301 {
3302    struct _mesa_HashTable *IDs;
3303    unsigned ZeroID; /* a HashTable won't take zero, so store its state here */
3304    struct simple_node Severity[3]; /* lists of IDs in the hash table */
3305 };
3306
3307 struct gl_client_debug
3308 {
3309    GLboolean Defaults[3][2][6]; /* severity, source, type */
3310    struct gl_client_namespace Namespaces[2][6]; /* source, type */
3311 };
3312
3313 struct gl_debug_state
3314 {
3315    GLDEBUGPROCARB Callback;
3316    GLvoid *CallbackData;
3317    GLboolean SyncOutput;
3318    GLboolean ApiErrors[API_ERROR_COUNT];
3319    GLboolean WinsysErrors[WINSYS_ERROR_COUNT];
3320    GLboolean ShaderErrors[SHADER_ERROR_COUNT];
3321    GLboolean OtherErrors[OTHER_ERROR_COUNT];
3322    struct gl_client_debug ClientIDs;
3323    struct gl_debug_msg Log[MAX_DEBUG_LOGGED_MESSAGES];
3324    GLint NumMessages;
3325    GLint NextMsg;
3326    GLint NextMsgLength; /* redundant, but copied here from Log[NextMsg].length
3327                            for the sake of the offsetof() code in get.c */
3328 };
3329
3330 /**
3331  * Enum for the OpenGL APIs we know about and may support.
3332  */
3333 typedef enum
3334 {
3335    API_OPENGL,      /* legacy / compatibility contexts */
3336    API_OPENGLES,
3337    API_OPENGLES2,
3338    API_OPENGL_CORE,
3339 } gl_api;
3340
3341 /**
3342  * Driver-specific state flags.
3343  *
3344  * These are or'd with gl_context::NewDriverState to notify a driver about
3345  * a state change. The driver sets the flags at context creation and
3346  * the meaning of the bits set is opaque to core Mesa.
3347  */
3348 struct gl_driver_flags
3349 {
3350    GLbitfield NewArray;             /**< Vertex array state */
3351 };
3352
3353 struct gl_uniform_buffer_binding
3354 {
3355    struct gl_buffer_object *BufferObject;
3356    /** Start of uniform block data in the buffer */
3357    GLintptr Offset;
3358    /** Size of data allowed to be referenced from the buffer (in bytes) */
3359    GLsizeiptr Size;
3360    /**
3361     * glBindBufferBase() indicates that the Size should be ignored and only
3362     * limited by the current size of the BufferObject.
3363     */
3364    GLboolean AutomaticSize;
3365 };
3366
3367 /**
3368  * Mesa rendering context.
3369  *
3370  * This is the central context data structure for Mesa.  Almost all
3371  * OpenGL state is contained in this structure.
3372  * Think of this as a base class from which device drivers will derive
3373  * sub classes.
3374  *
3375  * The struct gl_context typedef names this structure.
3376  */
3377 struct gl_context
3378 {
3379    /** State possibly shared with other contexts in the address space */
3380    struct gl_shared_state *Shared;
3381
3382    /** \name API function pointer tables */
3383    /*@{*/
3384    gl_api API;
3385    struct _glapi_table *Save;   /**< Display list save functions */
3386    struct _glapi_table *Exec;   /**< Execute functions */
3387    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
3388    /*@}*/
3389
3390    struct gl_config Visual;
3391    struct gl_framebuffer *DrawBuffer;   /**< buffer for writing */
3392    struct gl_framebuffer *ReadBuffer;   /**< buffer for reading */
3393    struct gl_framebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
3394    struct gl_framebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
3395
3396    /**
3397     * Device driver function pointer table
3398     */
3399    struct dd_function_table Driver;
3400
3401    void *DriverCtx;     /**< Points to device driver context/state */
3402
3403    /** Core/Driver constants */
3404    struct gl_constants Const;
3405
3406    /** \name The various 4x4 matrix stacks */
3407    /*@{*/
3408    struct gl_matrix_stack ModelviewMatrixStack;
3409    struct gl_matrix_stack ProjectionMatrixStack;
3410    struct gl_matrix_stack TextureMatrixStack[MAX_TEXTURE_UNITS];
3411    struct gl_matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
3412    struct gl_matrix_stack *CurrentStack; /**< Points to one of the above stacks */
3413    /*@}*/
3414
3415    /** Combined modelview and projection matrix */
3416    GLmatrix _ModelProjectMatrix;
3417
3418    /** \name Display lists */
3419    struct gl_dlist_state ListState;
3420
3421    GLboolean ExecuteFlag;       /**< Execute GL commands? */
3422    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
3423
3424    /** Extension information */
3425    struct gl_extensions Extensions;
3426
3427    /** GL version integer, for example 31 for GL 3.1, or 20 for GLES 2.0. */
3428    GLuint Version;
3429    char *VersionString;
3430
3431    /** \name State attribute stack (for glPush/PopAttrib) */
3432    /*@{*/
3433    GLuint AttribStackDepth;
3434    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
3435    /*@}*/
3436
3437    /** \name Renderer attribute groups
3438     *
3439     * We define a struct for each attribute group to make pushing and popping
3440     * attributes easy.  Also it's a good organization.
3441     */
3442    /*@{*/
3443    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
3444    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
3445    struct gl_current_attrib     Current;        /**< Current attributes */
3446    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
3447    struct gl_eval_attrib        Eval;           /**< Eval attributes */
3448    struct gl_fog_attrib         Fog;            /**< Fog attributes */
3449    struct gl_hint_attrib        Hint;           /**< Hint attributes */
3450    struct gl_light_attrib       Light;          /**< Light attributes */
3451    struct gl_line_attrib        Line;           /**< Line attributes */
3452    struct gl_list_attrib        List;           /**< List attributes */
3453    struct gl_multisample_attrib Multisample;
3454    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
3455    struct gl_point_attrib       Point;          /**< Point attributes */
3456    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
3457    GLuint PolygonStipple[32];                   /**< Polygon stipple */
3458    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
3459    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
3460    struct gl_texture_attrib     Texture;        /**< Texture attributes */
3461    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
3462    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
3463    /*@}*/
3464
3465    /** \name Client attribute stack */
3466    /*@{*/
3467    GLuint ClientAttribStackDepth;
3468    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
3469    /*@}*/
3470
3471    /** \name Client attribute groups */
3472    /*@{*/
3473    struct gl_array_attrib       Array;  /**< Vertex arrays */
3474    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
3475    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
3476    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
3477    /*@}*/
3478
3479    /** \name Other assorted state (not pushed/popped on attribute stack) */
3480    /*@{*/
3481    struct gl_pixelmaps          PixelMaps;
3482
3483    struct gl_evaluators EvalMap;   /**< All evaluators */
3484    struct gl_feedback   Feedback;  /**< Feedback */
3485    struct gl_selection  Select;    /**< Selection */
3486
3487    struct gl_program_state Program;  /**< general program state */
3488    struct gl_vertex_program_state VertexProgram;
3489    struct gl_fragment_program_state FragmentProgram;
3490    struct gl_geometry_program_state GeometryProgram;
3491    struct gl_ati_fragment_shader_state ATIFragmentShader;
3492
3493    struct gl_shader_state Shader; /**< GLSL shader object state */
3494    struct gl_shader_compiler_options ShaderCompilerOptions[MESA_SHADER_TYPES];
3495
3496    struct gl_query_state Query;  /**< occlusion, timer queries */
3497
3498    struct gl_transform_feedback_state TransformFeedback;
3499
3500    struct gl_buffer_object *CopyReadBuffer; /**< GL_ARB_copy_buffer */
3501    struct gl_buffer_object *CopyWriteBuffer; /**< GL_ARB_copy_buffer */
3502
3503    /**
3504     * Current GL_ARB_uniform_buffer_object binding referenced by
3505     * GL_UNIFORM_BUFFER target for glBufferData, glMapBuffer, etc.
3506     */
3507    struct gl_buffer_object *UniformBuffer;
3508
3509    /**
3510     * Array of uniform buffers for GL_ARB_uniform_buffer_object and GL 3.1.
3511     * This is set up using glBindBufferRange() or glBindBufferBase().  They are
3512     * associated with uniform blocks by glUniformBlockBinding()'s state in the
3513     * shader program.
3514     */
3515    struct gl_uniform_buffer_binding *UniformBufferBindings;
3516
3517    /*@}*/
3518
3519    struct gl_meta_state *Meta;  /**< for "meta" operations */
3520
3521    /* GL_EXT_framebuffer_object */
3522    struct gl_renderbuffer *CurrentRenderbuffer;
3523
3524    GLenum ErrorValue;        /**< Last error code */
3525
3526    /* GL_ARB_robustness */
3527    GLenum ResetStatus;
3528
3529    /**
3530     * Recognize and silence repeated error debug messages in buggy apps.
3531     */
3532    const char *ErrorDebugFmtString;
3533    GLuint ErrorDebugCount;
3534
3535    /* GL_ARB_debug_output */
3536    struct gl_debug_state Debug;
3537
3538    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
3539    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
3540    GLbitfield NewDriverState;/**< bitwise-or of flags from DriverFlags */
3541
3542    struct gl_driver_flags DriverFlags;
3543
3544    GLboolean ViewportInitialized;  /**< has viewport size been initialized? */
3545
3546    GLbitfield64 varying_vp_inputs;  /**< mask of VERT_BIT_* flags */
3547
3548    /** \name Derived state */
3549    /*@{*/
3550    /** Bitwise-or of DD_* flags.  Note that this bitfield may be used before
3551     * state validation so they need to always be current.
3552     */
3553    GLbitfield _TriangleCaps;
3554    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
3555    GLfloat _EyeZDir[3];
3556    GLfloat _ModelViewInvScale;
3557    GLboolean _NeedEyeCoords;
3558    GLboolean _ForceEyeCoords;
3559
3560    GLuint TextureStateTimestamp; /**< detect changes to shared state */
3561
3562    struct gl_list_extensions *ListExt; /**< driver dlist extensions */
3563
3564    /** \name For debugging/development only */
3565    /*@{*/
3566    GLboolean FirstTimeCurrent;
3567    /*@}*/
3568
3569    /** software compression/decompression supported or not */
3570    GLboolean Mesa_DXTn;
3571
3572    GLboolean TextureFormatSupported[MESA_FORMAT_COUNT];
3573
3574    /**
3575     * Use dp4 (rather than mul/mad) instructions for position
3576     * transformation?
3577     */
3578    GLboolean mvp_with_dp4;
3579
3580    GLboolean RasterDiscard;  /**< GL_RASTERIZER_DISCARD */
3581
3582    /**
3583     * \name Hooks for module contexts.
3584     *
3585     * These will eventually live in the driver or elsewhere.
3586     */
3587    /*@{*/
3588    void *swrast_context;
3589    void *swsetup_context;
3590    void *swtnl_context;
3591    void *swtnl_im;
3592    struct st_context *st;
3593    void *aelt_context;
3594    /*@}*/
3595 };
3596
3597
3598 #ifdef DEBUG
3599 extern int MESA_VERBOSE;
3600 extern int MESA_DEBUG_FLAGS;
3601 # define MESA_FUNCTION __FUNCTION__
3602 #else
3603 # define MESA_VERBOSE 0
3604 # define MESA_DEBUG_FLAGS 0
3605 # define MESA_FUNCTION "a function"
3606 # ifndef NDEBUG
3607 #  define NDEBUG
3608 # endif
3609 #endif
3610
3611
3612 /** The MESA_VERBOSE var is a bitmask of these flags */
3613 enum _verbose
3614 {
3615    VERBOSE_VARRAY               = 0x0001,
3616    VERBOSE_TEXTURE              = 0x0002,
3617    VERBOSE_MATERIAL             = 0x0004,
3618    VERBOSE_PIPELINE             = 0x0008,
3619    VERBOSE_DRIVER               = 0x0010,
3620    VERBOSE_STATE                = 0x0020,
3621    VERBOSE_API                  = 0x0040,
3622    VERBOSE_DISPLAY_LIST         = 0x0100,
3623    VERBOSE_LIGHTING             = 0x0200,
3624    VERBOSE_PRIMS                = 0x0400,
3625    VERBOSE_VERTS                = 0x0800,
3626    VERBOSE_DISASSEM             = 0x1000,
3627    VERBOSE_DRAW                 = 0x2000,
3628    VERBOSE_SWAPBUFFERS          = 0x4000
3629 };
3630
3631
3632 /** The MESA_DEBUG_FLAGS var is a bitmask of these flags */
3633 enum _debug
3634 {
3635    DEBUG_SILENT                 = (1 << 0),
3636    DEBUG_ALWAYS_FLUSH           = (1 << 1),
3637    DEBUG_INCOMPLETE_TEXTURE     = (1 << 2),
3638    DEBUG_INCOMPLETE_FBO         = (1 << 3)
3639 };
3640
3641
3642
3643 #ifdef __cplusplus
3644 }
3645 #endif
3646
3647 #endif /* MTYPES_H */