src/mesa/main/mtypes.h

   1 /**
   2  * \file mtypes.h
   3  * Main Mesa data structures.
   4  *
   5  * Please try to mark derived values with a leading underscore ('_').
   6  */
   7
   8 /*
   9  * Mesa 3-D graphics library
  10  * Version:  6.5.3
  11  *
  12  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the "Software"),
  16  * to deal in the Software without restriction, including without limitation
  17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  18  * and/or sell copies of the Software, and to permit persons to whom the
  19  * Software is furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice shall be included
  22  * in all copies or substantial portions of the Software.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  25  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  27  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  28  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30  */
  31
  32
  33
  34 #ifndef TYPES_H
  35 #define TYPES_H
  36
  37
  38 #include "glheader.h"
  39 #include <GL/internal/glcore.h> /* __GLcontextModes (GLvisual) */
  40 #include "config.h"             /* Hardwired parameters */
  41 #include "glapi/glapitable.h"
  42 #include "glapi/glthread.h"
  43 #include "math/m_matrix.h"      /* GLmatrix */
  44 #include "bitset.h"
  45
  46
  47 /**
  48  * Special, internal token
  49  */
  50 #define GL_SHADER_PROGRAM_MESA 0x9999
  51
  52
  53 /**
  54  * Color channel data type.
  55  */
  56 #if CHAN_BITS == 8
  57    typedef GLubyte GLchan;
  58 #define CHAN_MAX 255
  59 #define CHAN_MAXF 255.0F
  60 #define CHAN_TYPE GL_UNSIGNED_BYTE
  61 #elif CHAN_BITS == 16
  62    typedef GLushort GLchan;
  63 #define CHAN_MAX 65535
  64 #define CHAN_MAXF 65535.0F
  65 #define CHAN_TYPE GL_UNSIGNED_SHORT
  66 #elif CHAN_BITS == 32
  67    typedef GLfloat GLchan;
  68 #define CHAN_MAX 1.0
  69 #define CHAN_MAXF 1.0F
  70 #define CHAN_TYPE GL_FLOAT
  71 #else
  72 #error "illegal number of color channel bits"
  73 #endif
  74
  75
  76 /**
  77  * Stencil buffer data type.
  78  */
  79 #if STENCIL_BITS==8
  80    typedef GLubyte GLstencil;
  81 #elif STENCIL_BITS==16
  82    typedef GLushort GLstencil;
  83 #else
  84 #  error "illegal number of stencil bits"
  85 #endif
  86
  87
  88 /**
  89  * Fixed point data type.
  90  */
  91 typedef int GLfixed;
  92 /*
  93  * Fixed point arithmetic macros
  94  */
  95 #ifndef FIXED_FRAC_BITS
  96 #define FIXED_FRAC_BITS 11
  97 #endif
  98
  99 #define FIXED_SHIFT     FIXED_FRAC_BITS
 100 #define FIXED_ONE       (1 << FIXED_SHIFT)
 101 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
 102 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
 103 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
 104 #define FIXED_EPSILON   1
 105 #define FIXED_SCALE     ((float) FIXED_ONE)
 106 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 107 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 108 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 109 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 110 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 111 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 112 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 113 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 114 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 115 #define PosFloatToFixed(X)      FloatToFixed(X)
 116 #define SignedFloatToFixed(X)   FloatToFixed(X)
 117
 118
 119
 120 /**
 121  * \name Some forward type declarations
 122  */
 123 /*@{*/
 124 struct _mesa_HashTable;
 125 struct gl_pixelstore_attrib;
 126 struct gl_program_cache;
 127 struct gl_texture_format;
 128 struct gl_texture_image;
 129 struct gl_texture_object;
 130 struct st_context;
 131 struct pipe_surface;
 132 typedef struct __GLcontextRec GLcontext;
 133 typedef struct __GLcontextModesRec GLvisual;
 134 typedef struct gl_framebuffer GLframebuffer;
 135 /*@}*/
 136
 137
 138
 139 /**
 140  * Indexes for vertex program attributes.
 141  * GL_NV_vertex_program aliases generic attributes over the conventional
 142  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 143  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 144  * generic attributes are distinct/separate).
 145  */
 146 enum
 147 {
 148    VERT_ATTRIB_POS = 0,
 149    VERT_ATTRIB_WEIGHT = 1,
 150    VERT_ATTRIB_NORMAL = 2,
 151    VERT_ATTRIB_COLOR0 = 3,
 152    VERT_ATTRIB_COLOR1 = 4,
 153    VERT_ATTRIB_FOG = 5,
 154    VERT_ATTRIB_COLOR_INDEX = 6,
 155    VERT_ATTRIB_EDGEFLAG = 7,
 156    VERT_ATTRIB_TEX0 = 8,
 157    VERT_ATTRIB_TEX1 = 9,
 158    VERT_ATTRIB_TEX2 = 10,
 159    VERT_ATTRIB_TEX3 = 11,
 160    VERT_ATTRIB_TEX4 = 12,
 161    VERT_ATTRIB_TEX5 = 13,
 162    VERT_ATTRIB_TEX6 = 14,
 163    VERT_ATTRIB_TEX7 = 15,
 164    VERT_ATTRIB_GENERIC0 = 16,
 165    VERT_ATTRIB_GENERIC1 = 17,
 166    VERT_ATTRIB_GENERIC2 = 18,
 167    VERT_ATTRIB_GENERIC3 = 19,
 168    VERT_ATTRIB_GENERIC4 = 20,
 169    VERT_ATTRIB_GENERIC5 = 21,
 170    VERT_ATTRIB_GENERIC6 = 22,
 171    VERT_ATTRIB_GENERIC7 = 23,
 172    VERT_ATTRIB_GENERIC8 = 24,
 173    VERT_ATTRIB_GENERIC9 = 25,
 174    VERT_ATTRIB_GENERIC10 = 26,
 175    VERT_ATTRIB_GENERIC11 = 27,
 176    VERT_ATTRIB_GENERIC12 = 28,
 177    VERT_ATTRIB_GENERIC13 = 29,
 178    VERT_ATTRIB_GENERIC14 = 30,
 179    VERT_ATTRIB_GENERIC15 = 31,
 180    VERT_ATTRIB_MAX = 32
 181 };
 182
 183 /**
 184  * Bitflags for vertex attributes.
 185  * These are used in bitfields in many places.
 186  */
 187 /*@{*/
 188 #define VERT_BIT_POS         (1 << VERT_ATTRIB_POS)
 189 #define VERT_BIT_WEIGHT      (1 << VERT_ATTRIB_WEIGHT)
 190 #define VERT_BIT_NORMAL      (1 << VERT_ATTRIB_NORMAL)
 191 #define VERT_BIT_COLOR0      (1 << VERT_ATTRIB_COLOR0)
 192 #define VERT_BIT_COLOR1      (1 << VERT_ATTRIB_COLOR1)
 193 #define VERT_BIT_FOG         (1 << VERT_ATTRIB_FOG)
 194 #define VERT_BIT_COLOR_INDEX (1 << VERT_ATTRIB_COLOR_INDEX)
 195 #define VERT_BIT_EDGEFLAG    (1 << VERT_ATTRIB_EDGEFLAG)
 196 #define VERT_BIT_TEX0        (1 << VERT_ATTRIB_TEX0)
 197 #define VERT_BIT_TEX1        (1 << VERT_ATTRIB_TEX1)
 198 #define VERT_BIT_TEX2        (1 << VERT_ATTRIB_TEX2)
 199 #define VERT_BIT_TEX3        (1 << VERT_ATTRIB_TEX3)
 200 #define VERT_BIT_TEX4        (1 << VERT_ATTRIB_TEX4)
 201 #define VERT_BIT_TEX5        (1 << VERT_ATTRIB_TEX5)
 202 #define VERT_BIT_TEX6        (1 << VERT_ATTRIB_TEX6)
 203 #define VERT_BIT_TEX7        (1 << VERT_ATTRIB_TEX7)
 204 #define VERT_BIT_GENERIC0    (1 << VERT_ATTRIB_GENERIC0)
 205 #define VERT_BIT_GENERIC1    (1 << VERT_ATTRIB_GENERIC1)
 206 #define VERT_BIT_GENERIC2    (1 << VERT_ATTRIB_GENERIC2)
 207 #define VERT_BIT_GENERIC3    (1 << VERT_ATTRIB_GENERIC3)
 208 #define VERT_BIT_GENERIC4    (1 << VERT_ATTRIB_GENERIC4)
 209 #define VERT_BIT_GENERIC5    (1 << VERT_ATTRIB_GENERIC5)
 210 #define VERT_BIT_GENERIC6    (1 << VERT_ATTRIB_GENERIC6)
 211 #define VERT_BIT_GENERIC7    (1 << VERT_ATTRIB_GENERIC7)
 212 #define VERT_BIT_GENERIC8    (1 << VERT_ATTRIB_GENERIC8)
 213 #define VERT_BIT_GENERIC9    (1 << VERT_ATTRIB_GENERIC9)
 214 #define VERT_BIT_GENERIC10   (1 << VERT_ATTRIB_GENERIC10)
 215 #define VERT_BIT_GENERIC11   (1 << VERT_ATTRIB_GENERIC11)
 216 #define VERT_BIT_GENERIC12   (1 << VERT_ATTRIB_GENERIC12)
 217 #define VERT_BIT_GENERIC13   (1 << VERT_ATTRIB_GENERIC13)
 218 #define VERT_BIT_GENERIC14   (1 << VERT_ATTRIB_GENERIC14)
 219 #define VERT_BIT_GENERIC15   (1 << VERT_ATTRIB_GENERIC15)
 220
 221 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 222 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 223 /*@}*/
 224
 225
 226 /**
 227  * Indexes for vertex program result attributes
 228  */
 229 /*@{*/
 230 #define VERT_RESULT_HPOS 0
 231 #define VERT_RESULT_COL0 1
 232 #define VERT_RESULT_COL1 2
 233 #define VERT_RESULT_FOGC 3
 234 #define VERT_RESULT_TEX0 4
 235 #define VERT_RESULT_TEX1 5
 236 #define VERT_RESULT_TEX2 6
 237 #define VERT_RESULT_TEX3 7
 238 #define VERT_RESULT_TEX4 8
 239 #define VERT_RESULT_TEX5 9
 240 #define VERT_RESULT_TEX6 10
 241 #define VERT_RESULT_TEX7 11
 242 #define VERT_RESULT_PSIZ 12
 243 #define VERT_RESULT_BFC0 13
 244 #define VERT_RESULT_BFC1 14
 245 #define VERT_RESULT_EDGE 15
 246 #define VERT_RESULT_VAR0 16  /**< shader varying */
 247 #define VERT_RESULT_MAX  (VERT_RESULT_VAR0 + MAX_VARYING)
 248 /*@}*/
 249
 250
 251 /**
 252  * Indexes for fragment program input attributes.
 253  */
 254 enum
 255 {
 256    FRAG_ATTRIB_WPOS = 0,
 257    FRAG_ATTRIB_COL0 = 1,
 258    FRAG_ATTRIB_COL1 = 2,
 259    FRAG_ATTRIB_FOGC = 3,
 260    FRAG_ATTRIB_TEX0 = 4,
 261    FRAG_ATTRIB_TEX1 = 5,
 262    FRAG_ATTRIB_TEX2 = 6,
 263    FRAG_ATTRIB_TEX3 = 7,
 264    FRAG_ATTRIB_TEX4 = 8,
 265    FRAG_ATTRIB_TEX5 = 9,
 266    FRAG_ATTRIB_TEX6 = 10,
 267    FRAG_ATTRIB_TEX7 = 11,
 268    FRAG_ATTRIB_VAR0 = 12,  /**< shader varying */
 269    FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + MAX_VARYING)
 270 };
 271
 272 /**
 273  * Bitflags for fragment program input attributes.
 274  */
 275 /*@{*/
 276 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 277 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 278 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 279 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 280 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 281 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 282 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 283 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 284 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 285 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 286 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 287 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 288 #define FRAG_BIT_VAR0  (1 << FRAG_ATTRIB_VAR0)
 289
 290 #define FRAG_BIT_TEX(U)  (FRAG_BIT_TEX0 << (U))
 291 #define FRAG_BIT_VAR(V)  (FRAG_BIT_VAR0 << (V))
 292
 293 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 294                            FRAG_BIT_TEX1|       \
 295                            FRAG_BIT_TEX2|       \
 296                            FRAG_BIT_TEX3|       \
 297                            FRAG_BIT_TEX4|       \
 298                            FRAG_BIT_TEX5|       \
 299                            FRAG_BIT_TEX6|       \
 300                            FRAG_BIT_TEX7)
 301 /*@}*/
 302
 303
 304 /**
 305  * Fragment program results
 306  */
 307 enum
 308 {
 309    FRAG_RESULT_COLR = 0,
 310    FRAG_RESULT_COLH = 1,
 311    FRAG_RESULT_DEPR = 2,
 312    FRAG_RESULT_DATA0 = 3,
 313    FRAG_RESULT_MAX = (FRAG_RESULT_DATA0 + MAX_DRAW_BUFFERS)
 314 };
 315
 316
 317 /**
 318  * Indexes for all renderbuffers
 319  */
 320 enum {
 321    BUFFER_FRONT_LEFT  = 0,  /* the four standard color buffers */
 322    BUFFER_BACK_LEFT   = 1,
 323    BUFFER_FRONT_RIGHT = 2,
 324    BUFFER_BACK_RIGHT  = 3,
 325    BUFFER_AUX0        = 4,  /* optional aux buffer */
 326    BUFFER_AUX1        = 5,
 327    BUFFER_AUX2        = 6,
 328    BUFFER_AUX3        = 7,
 329    BUFFER_DEPTH       = 8,
 330    BUFFER_STENCIL     = 9,
 331    BUFFER_ACCUM       = 10,
 332    BUFFER_COLOR0      = 11, /* generic renderbuffers */
 333    BUFFER_COLOR1      = 12,
 334    BUFFER_COLOR2      = 13,
 335    BUFFER_COLOR3      = 14,
 336    BUFFER_COLOR4      = 15,
 337    BUFFER_COLOR5      = 16,
 338    BUFFER_COLOR6      = 17,
 339    BUFFER_COLOR7      = 18,
 340    BUFFER_COUNT       = 19
 341 };
 342
 343 /**
 344  * Bit flags for all renderbuffers
 345  */
 346 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 347 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 348 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 349 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 350 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 351 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 352 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 353 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 354 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 355 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 356 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 357 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 358 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 359 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 360 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 361 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 362 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 363 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 364 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 365
 366 /**
 367  * Mask of all the color buffer bits (but not accum).
 368  */
 369 #define BUFFER_BITS_COLOR  (BUFFER_BIT_FRONT_LEFT | \
 370                             BUFFER_BIT_BACK_LEFT | \
 371                             BUFFER_BIT_FRONT_RIGHT | \
 372                             BUFFER_BIT_BACK_RIGHT | \
 373                             BUFFER_BIT_AUX0 | \
 374                             BUFFER_BIT_AUX1 | \
 375                             BUFFER_BIT_AUX2 | \
 376                             BUFFER_BIT_AUX3 | \
 377                             BUFFER_BIT_COLOR0 | \
 378                             BUFFER_BIT_COLOR1 | \
 379                             BUFFER_BIT_COLOR2 | \
 380                             BUFFER_BIT_COLOR3 | \
 381                             BUFFER_BIT_COLOR4 | \
 382                             BUFFER_BIT_COLOR5 | \
 383                             BUFFER_BIT_COLOR6 | \
 384                             BUFFER_BIT_COLOR7)
 385
 386
 387 /** The pixel transfer path has three color tables: */
 388 /*@{*/
 389 #define COLORTABLE_PRECONVOLUTION  0
 390 #define COLORTABLE_POSTCONVOLUTION 1
 391 #define COLORTABLE_POSTCOLORMATRIX 2
 392 #define COLORTABLE_MAX 3
 393 /*@}*/
 394
 395
 396 /**
 397  * Data structure for color tables
 398  */
 399 struct gl_color_table
 400 {
 401    GLenum InternalFormat;      /**< The user-specified format */
 402    GLenum _BaseFormat;         /**< GL_ALPHA, GL_RGBA, GL_RGB, etc */
 403    GLuint Size;                /**< number of entries in table */
 404    GLfloat *TableF;            /**< Color table, floating point values */
 405    GLubyte *TableUB;           /**< Color table, ubyte values */
 406    GLubyte RedSize;
 407    GLubyte GreenSize;
 408    GLubyte BlueSize;
 409    GLubyte AlphaSize;
 410    GLubyte LuminanceSize;
 411    GLubyte IntensitySize;
 412 };
 413
 414
 415 /**
 416  * \name Bit flags used for updating material values.
 417  */
 418 /*@{*/
 419 #define MAT_ATTRIB_FRONT_AMBIENT           0
 420 #define MAT_ATTRIB_BACK_AMBIENT            1
 421 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 422 #define MAT_ATTRIB_BACK_DIFFUSE            3
 423 #define MAT_ATTRIB_FRONT_SPECULAR          4
 424 #define MAT_ATTRIB_BACK_SPECULAR           5
 425 #define MAT_ATTRIB_FRONT_EMISSION          6
 426 #define MAT_ATTRIB_BACK_EMISSION           7
 427 #define MAT_ATTRIB_FRONT_SHININESS         8
 428 #define MAT_ATTRIB_BACK_SHININESS          9
 429 #define MAT_ATTRIB_FRONT_INDEXES           10
 430 #define MAT_ATTRIB_BACK_INDEXES            11
 431 #define MAT_ATTRIB_MAX                     12
 432
 433 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 434 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 435 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 436 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 437 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 438 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 439
 440 #define MAT_INDEX_AMBIENT  0
 441 #define MAT_INDEX_DIFFUSE  1
 442 #define MAT_INDEX_SPECULAR 2
 443
 444 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 445 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 446 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 447 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 448 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 449 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 450 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 451 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 452 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 453 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 454 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 455 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 456
 457
 458 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 459                                  MAT_BIT_FRONT_AMBIENT |        \
 460                                  MAT_BIT_FRONT_DIFFUSE |        \
 461                                  MAT_BIT_FRONT_SPECULAR |       \
 462                                  MAT_BIT_FRONT_SHININESS |      \
 463                                  MAT_BIT_FRONT_INDEXES)
 464
 465 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 466                                  MAT_BIT_BACK_AMBIENT |         \
 467                                  MAT_BIT_BACK_DIFFUSE |         \
 468                                  MAT_BIT_BACK_SPECULAR |        \
 469                                  MAT_BIT_BACK_SHININESS |       \
 470                                  MAT_BIT_BACK_INDEXES)
 471
 472 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 473 /*@}*/
 474
 475
 476 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 477 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 478
 479 /**
 480  * Material shininess lookup table.
 481  */
 482 struct gl_shine_tab
 483 {
 484    struct gl_shine_tab *next, *prev;
 485    GLfloat tab[SHINE_TABLE_SIZE+1];
 486    GLfloat shininess;
 487    GLuint refcount;
 488 };
 489
 490
 491 /**
 492  * Light source state.
 493  */
 494 struct gl_light
 495 {
 496    struct gl_light *next;       /**< double linked list with sentinel */
 497    struct gl_light *prev;
 498
 499    GLfloat Ambient[4];          /**< ambient color */
 500    GLfloat Diffuse[4];          /**< diffuse color */
 501    GLfloat Specular[4];         /**< specular color */
 502    GLfloat EyePosition[4];      /**< position in eye coordinates */
 503    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 504    GLfloat SpotExponent;
 505    GLfloat SpotCutoff;          /**< in degrees */
 506    GLfloat _CosCutoffNeg;       /**< = cos(SpotCutoff) */
 507    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 508    GLfloat ConstantAttenuation;
 509    GLfloat LinearAttenuation;
 510    GLfloat QuadraticAttenuation;
 511    GLboolean Enabled;           /**< On/off flag */
 512
 513    /**
 514     * \name Derived fields
 515     */
 516    /*@{*/
 517    GLbitfield _Flags;           /**< State */
 518
 519    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 520    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 521    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 522    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 523    GLfloat _VP_inf_spot_attenuation;
 524
 525    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 526    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 527    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 528    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 529    GLfloat _dli;                /**< CI diffuse light intensity */
 530    GLfloat _sli;                /**< CI specular light intensity */
 531    /*@}*/
 532 };
 533
 534
 535 /**
 536  * Light model state.
 537  */
 538 struct gl_lightmodel
 539 {
 540    GLfloat Ambient[4];          /**< ambient color */
 541    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 542    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 543    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 544                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 545 };
 546
 547
 548 /**
 549  * Material state.
 550  */
 551 struct gl_material
 552 {
 553    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 554 };
 555
 556
 557 /**
 558  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 559  */
 560 struct gl_accum_attrib
 561 {
 562    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 563 };
 564
 565
 566 /**
 567  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 568  */
 569 struct gl_colorbuffer_attrib
 570 {
 571    GLuint ClearIndex;                   /**< Index to use for glClear */
 572    GLclampf ClearColor[4];              /**< Color to use for glClear */
 573
 574    GLuint IndexMask;                    /**< Color index write mask */
 575    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 576
 577    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 578
 579    /**
 580     * \name alpha testing
 581     */
 582    /*@{*/
 583    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 584    GLenum AlphaFunc;                    /**< Alpha test function */
 585    GLclampf AlphaRef;                   /**< Alpha reference value */
 586    /*@}*/
 587
 588    /**
 589     * \name Blending
 590     */
 591    /*@{*/
 592    GLboolean BlendEnabled;              /**< Blending enabled flag */
 593    GLenum BlendSrcRGB;                  /**< Blending source operator */
 594    GLenum BlendDstRGB;                  /**< Blending destination operator */
 595    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 596    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 597    GLenum BlendEquationRGB;             /**< Blending equation */
 598    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 599    GLfloat BlendColor[4];               /**< Blending color */
 600    /*@}*/
 601
 602    /**
 603     * \name Logic op
 604     */
 605    /*@{*/
 606    GLenum LogicOp;                      /**< Logic operator */
 607    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 608    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 609    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 610    /*@}*/
 611
 612    GLboolean DitherFlag;                /**< Dither enable flag */
 613
 614    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 615    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 616 };
 617
 618
 619 /**
 620  * Current attribute group (GL_CURRENT_BIT).
 621  */
 622 struct gl_current_attrib
 623 {
 624    /**
 625     * \name Current vertex attributes.
 626     * \note Values are valid only after FLUSH_VERTICES has been called.
 627     * \note Index and Edgeflag current values are stored as floats in the
 628     * SIX and SEVEN attribute slots.
 629     */
 630    /*@{*/
 631    GLfloat Attrib[VERT_ATTRIB_MAX][4];  /**< Position, color, texcoords, etc */
 632    /*@}*/
 633
 634    /**
 635     * \name Current raster position attributes (always valid).
 636     * \note This set of attributes is very similar to the SWvertex struct.
 637     */
 638    /*@{*/
 639    GLfloat RasterPos[4];
 640    GLfloat RasterDistance;
 641    GLfloat RasterColor[4];
 642    GLfloat RasterSecondaryColor[4];
 643    GLfloat RasterIndex;
 644    GLfloat RasterTexCoords[MAX_TEXTURE_COORD_UNITS][4];
 645    GLboolean RasterPosValid;
 646    /*@}*/
 647 };
 648
 649
 650 /**
 651  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 652  */
 653 struct gl_depthbuffer_attrib
 654 {
 655    GLenum Func;                 /**< Function for depth buffer compare */
 656    GLclampd Clear;              /**< Value to clear depth buffer to */
 657    GLboolean Test;              /**< Depth buffering enabled flag */
 658    GLboolean Mask;              /**< Depth buffer writable? */
 659    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 660    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 661 };
 662
 663
 664 /**
 665  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
 666  */
 667 struct gl_enable_attrib
 668 {
 669    GLboolean AlphaTest;
 670    GLboolean AutoNormal;
 671    GLboolean Blend;
 672    GLbitfield ClipPlanes;
 673    GLboolean ColorMaterial;
 674    GLboolean ColorTable[COLORTABLE_MAX];
 675    GLboolean Convolution1D;
 676    GLboolean Convolution2D;
 677    GLboolean Separable2D;
 678    GLboolean CullFace;
 679    GLboolean DepthTest;
 680    GLboolean Dither;
 681    GLboolean Fog;
 682    GLboolean Histogram;
 683    GLboolean Light[MAX_LIGHTS];
 684    GLboolean Lighting;
 685    GLboolean LineSmooth;
 686    GLboolean LineStipple;
 687    GLboolean IndexLogicOp;
 688    GLboolean ColorLogicOp;
 689    GLboolean Map1Color4;
 690    GLboolean Map1Index;
 691    GLboolean Map1Normal;
 692    GLboolean Map1TextureCoord1;
 693    GLboolean Map1TextureCoord2;
 694    GLboolean Map1TextureCoord3;
 695    GLboolean Map1TextureCoord4;
 696    GLboolean Map1Vertex3;
 697    GLboolean Map1Vertex4;
 698    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 699    GLboolean Map2Color4;
 700    GLboolean Map2Index;
 701    GLboolean Map2Normal;
 702    GLboolean Map2TextureCoord1;
 703    GLboolean Map2TextureCoord2;
 704    GLboolean Map2TextureCoord3;
 705    GLboolean Map2TextureCoord4;
 706    GLboolean Map2Vertex3;
 707    GLboolean Map2Vertex4;
 708    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 709    GLboolean MinMax;
 710    GLboolean Normalize;
 711    GLboolean PixelTexture;
 712    GLboolean PointSmooth;
 713    GLboolean PolygonOffsetPoint;
 714    GLboolean PolygonOffsetLine;
 715    GLboolean PolygonOffsetFill;
 716    GLboolean PolygonSmooth;
 717    GLboolean PolygonStipple;
 718    GLboolean RescaleNormals;
 719    GLboolean Scissor;
 720    GLboolean Stencil;
 721    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 722    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 723    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 724    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 725    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 726    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 727    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 728    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 729    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 730    /* SGI_texture_color_table */
 731    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 732    /* GL_ARB_vertex_program / GL_NV_vertex_program */
 733    GLboolean VertexProgram;
 734    GLboolean VertexProgramPointSize;
 735    GLboolean VertexProgramTwoSide;
 736    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 737    GLboolean PointSprite;
 738    GLboolean FragmentShaderATI;
 739 };
 740
 741
 742 /**
 743  * Evaluator attribute group (GL_EVAL_BIT).
 744  */
 745 struct gl_eval_attrib
 746 {
 747    /**
 748     * \name Enable bits
 749     */
 750    /*@{*/
 751    GLboolean Map1Color4;
 752    GLboolean Map1Index;
 753    GLboolean Map1Normal;
 754    GLboolean Map1TextureCoord1;
 755    GLboolean Map1TextureCoord2;
 756    GLboolean Map1TextureCoord3;
 757    GLboolean Map1TextureCoord4;
 758    GLboolean Map1Vertex3;
 759    GLboolean Map1Vertex4;
 760    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 761    GLboolean Map2Color4;
 762    GLboolean Map2Index;
 763    GLboolean Map2Normal;
 764    GLboolean Map2TextureCoord1;
 765    GLboolean Map2TextureCoord2;
 766    GLboolean Map2TextureCoord3;
 767    GLboolean Map2TextureCoord4;
 768    GLboolean Map2Vertex3;
 769    GLboolean Map2Vertex4;
 770    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 771    GLboolean AutoNormal;
 772    /*@}*/
 773
 774    /**
 775     * \name Map Grid endpoints and divisions and calculated du values
 776     */
 777    /*@{*/
 778    GLint MapGrid1un;
 779    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 780    GLint MapGrid2un, MapGrid2vn;
 781    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 782    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 783    /*@}*/
 784 };
 785
 786
 787 /**
 788  * Fog attribute group (GL_FOG_BIT).
 789  */
 790 struct gl_fog_attrib
 791 {
 792    GLboolean Enabled;           /**< Fog enabled flag */
 793    GLfloat Color[4];            /**< Fog color */
 794    GLfloat Density;             /**< Density >= 0.0 */
 795    GLfloat Start;               /**< Start distance in eye coords */
 796    GLfloat End;                 /**< End distance in eye coords */
 797    GLfloat Index;               /**< Fog index */
 798    GLenum Mode;                 /**< Fog mode */
 799    GLboolean ColorSumEnabled;
 800    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 801    GLfloat _Scale;              /**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
 802 };
 803
 804
 805 /**
 806  * Hint attribute group (GL_HINT_BIT).
 807  *
 808  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 809  */
 810 struct gl_hint_attrib
 811 {
 812    GLenum PerspectiveCorrection;
 813    GLenum PointSmooth;
 814    GLenum LineSmooth;
 815    GLenum PolygonSmooth;
 816    GLenum Fog;
 817    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 818    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 819    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 820    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 821 };
 822
 823
 824 /**
 825  * Histogram attributes.
 826  */
 827 struct gl_histogram_attrib
 828 {
 829    GLuint Width;                                /**< number of table entries */
 830    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 831    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 832    GLboolean Sink;                              /**< terminate image transfer? */
 833    GLubyte RedSize;                             /**< Bits per counter */
 834    GLubyte GreenSize;
 835    GLubyte BlueSize;
 836    GLubyte AlphaSize;
 837    GLubyte LuminanceSize;
 838 };
 839
 840
 841 /**
 842  * Color Min/max state.
 843  */
 844 struct gl_minmax_attrib
 845 {
 846    GLenum Format;
 847    GLboolean Sink;
 848    GLfloat Min[4], Max[4];   /**< RGBA */
 849 };
 850
 851
 852 /**
 853  * Image convolution state.
 854  */
 855 struct gl_convolution_attrib
 856 {
 857    GLenum Format;
 858    GLenum InternalFormat;
 859    GLuint Width;
 860    GLuint Height;
 861    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 862 };
 863
 864
 865 /**
 866  * Light state flags.
 867  */
 868 /*@{*/
 869 #define LIGHT_SPOT         0x1
 870 #define LIGHT_LOCAL_VIEWER 0x2
 871 #define LIGHT_POSITIONAL   0x4
 872 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 873 /*@}*/
 874
 875
 876 /**
 877  * Lighting attribute group (GL_LIGHT_BIT).
 878  */
 879 struct gl_light_attrib
 880 {
 881    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 882    struct gl_lightmodel Model;          /**< Lighting model */
 883
 884    /**
 885     * Must flush FLUSH_VERTICES before referencing:
 886     */
 887    /*@{*/
 888    struct gl_material Material;         /**< Includes front & back values */
 889    /*@}*/
 890
 891    GLboolean Enabled;                   /**< Lighting enabled flag */
 892    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 893    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 894    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 895    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 896    GLboolean ColorMaterialEnabled;
 897    GLenum ClampVertexColor;
 898
 899    struct gl_light EnabledList;         /**< List sentinel */
 900
 901    /**
 902     * Derived state for optimizations:
 903     */
 904    /*@{*/
 905    GLboolean _NeedEyeCoords;
 906    GLboolean _NeedVertices;             /**< Use fast shader? */
 907    GLbitfield  _Flags;                  /**< LIGHT_* flags, see above */
 908    GLfloat _BaseColor[2][3];
 909    /*@}*/
 910 };
 911
 912
 913 /**
 914  * Line attribute group (GL_LINE_BIT).
 915  */
 916 struct gl_line_attrib
 917 {
 918    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 919    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 920    GLushort StipplePattern;     /**< Stipple pattern */
 921    GLint StippleFactor;         /**< Stipple repeat factor */
 922    GLfloat Width;               /**< Line width */
 923 };
 924
 925
 926 /**
 927  * Display list attribute group (GL_LIST_BIT).
 928  */
 929 struct gl_list_attrib
 930 {
 931    GLuint ListBase;
 932 };
 933
 934
 935 /**
 936  * Used by device drivers to hook new commands into display lists.
 937  */
 938 struct gl_list_instruction
 939 {
 940    GLuint Size;
 941    void (*Execute)( GLcontext *ctx, void *data );
 942    void (*Destroy)( GLcontext *ctx, void *data );
 943    void (*Print)( GLcontext *ctx, void *data );
 944 };
 945
 946 #define MAX_DLIST_EXT_OPCODES 16
 947
 948 /**
 949  * Used by device drivers to hook new commands into display lists.
 950  */
 951 struct gl_list_extensions
 952 {
 953    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 954    GLuint NumOpcodes;
 955 };
 956
 957
 958 /**
 959  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 960  */
 961 struct gl_multisample_attrib
 962 {
 963    GLboolean Enabled;
 964    GLboolean SampleAlphaToCoverage;
 965    GLboolean SampleAlphaToOne;
 966    GLboolean SampleCoverage;
 967    GLfloat SampleCoverageValue;
 968    GLboolean SampleCoverageInvert;
 969 };
 970
 971
 972 /**
 973  * A pixelmap (see glPixelMap)
 974  */
 975 struct gl_pixelmap
 976 {
 977    GLint Size;
 978    GLfloat Map[MAX_PIXEL_MAP_TABLE];
 979    GLubyte Map8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 980 };
 981
 982
 983 /**
 984  * Collection of all pixelmaps
 985  */
 986 struct gl_pixelmaps
 987 {
 988    struct gl_pixelmap RtoR;  /**< i.e. GL_PIXEL_MAP_R_TO_R */
 989    struct gl_pixelmap GtoG;
 990    struct gl_pixelmap BtoB;
 991    struct gl_pixelmap AtoA;
 992    struct gl_pixelmap ItoR;
 993    struct gl_pixelmap ItoG;
 994    struct gl_pixelmap ItoB;
 995    struct gl_pixelmap ItoA;
 996    struct gl_pixelmap ItoI;
 997    struct gl_pixelmap StoS;
 998 };
 999
1000
1001 /**
1002  * Pixel attribute group (GL_PIXEL_MODE_BIT).
1003  */
1004 struct gl_pixel_attrib
1005 {
1006    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
1007
1008    /*--- Begin Pixel Transfer State ---*/
1009    /* Fields are in the order in which they're applied... */
1010
1011    /* Scale & Bias (index shift, offset) */
1012    GLfloat RedBias, RedScale;
1013    GLfloat GreenBias, GreenScale;
1014    GLfloat BlueBias, BlueScale;
1015    GLfloat AlphaBias, AlphaScale;
1016    GLfloat DepthBias, DepthScale;
1017    GLint IndexShift, IndexOffset;
1018
1019    /* Pixel Maps */
1020    /* Note: actual pixel maps are not part of this attrib group */
1021    GLboolean MapColorFlag;
1022    GLboolean MapStencilFlag;
1023
1024    /* There are multiple color table stages: */
1025    GLboolean ColorTableEnabled[COLORTABLE_MAX];
1026    GLfloat ColorTableScale[COLORTABLE_MAX][4];  /**< RGBA */
1027    GLfloat ColorTableBias[COLORTABLE_MAX][4];   /**< RGBA */
1028
1029    /* Convolution (GL_EXT_convolution) */
1030    GLboolean Convolution1DEnabled;
1031    GLboolean Convolution2DEnabled;
1032    GLboolean Separable2DEnabled;
1033    GLfloat ConvolutionBorderColor[3][4];
1034    GLenum ConvolutionBorderMode[3];
1035    GLfloat ConvolutionFilterScale[3][4];  /**< RGBA */
1036    GLfloat ConvolutionFilterBias[3][4];   /**< RGBA */
1037    GLfloat PostConvolutionScale[4];  /**< RGBA */
1038    GLfloat PostConvolutionBias[4];   /**< RGBA */
1039
1040    /* Color matrix (GL_SGI_color_matrix) */
1041    /* Note: the color matrix is not part of this attrib group */
1042    GLfloat PostColorMatrixScale[4];  /**< RGBA */
1043    GLfloat PostColorMatrixBias[4];   /**< RGBA */
1044
1045    /* Histogram & minmax (GL_EXT_histogram) */
1046    /* Note: histogram and minmax data are not part of this attrib group */
1047    GLboolean HistogramEnabled;
1048    GLboolean MinMaxEnabled;
1049
1050    /*--- End Pixel Transfer State ---*/
1051
1052    /* Pixel Zoom */
1053    GLfloat ZoomX, ZoomY;
1054
1055    /** GL_SGI_texture_color_table */
1056    GLfloat TextureColorTableScale[4];
1057    GLfloat TextureColorTableBias[4];
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 struct gl_stencil_attrib
1115 {
1116    GLboolean Enabled;           /**< Enabled flag */
1117    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1118    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1119    GLboolean _TestTwoSide;
1120    GLenum Function[2];          /**< Stencil function */
1121    GLenum FailFunc[2];          /**< Fail function */
1122    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1123    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1124    GLint Ref[2];                /**< Reference value */
1125    GLuint ValueMask[2];         /**< Value mask */
1126    GLuint WriteMask[2];         /**< Write mask */
1127    GLuint Clear;                /**< Clear value */
1128 };
1129
1130
1131 #define NUM_TEXTURE_TARGETS 7   /* 1D, 2D, 3D, CUBE, RECT, 1D_STACK, and 2D_STACK */
1132
1133 /**
1134  * An index for each type of texture object
1135  */
1136 /*@{*/
1137 #define TEXTURE_1D_INDEX       0
1138 #define TEXTURE_2D_INDEX       1
1139 #define TEXTURE_3D_INDEX       2
1140 #define TEXTURE_CUBE_INDEX     3
1141 #define TEXTURE_RECT_INDEX     4
1142 #define TEXTURE_1D_ARRAY_INDEX 5
1143 #define TEXTURE_2D_ARRAY_INDEX 6
1144 /*@}*/
1145
1146 /**
1147  * Bit flags for each type of texture object
1148  * Used for Texture.Unit[]._ReallyEnabled flags.
1149  */
1150 /*@{*/
1151 #define TEXTURE_1D_BIT       (1 << TEXTURE_1D_INDEX)
1152 #define TEXTURE_2D_BIT       (1 << TEXTURE_2D_INDEX)
1153 #define TEXTURE_3D_BIT       (1 << TEXTURE_3D_INDEX)
1154 #define TEXTURE_CUBE_BIT     (1 << TEXTURE_CUBE_INDEX)
1155 #define TEXTURE_RECT_BIT     (1 << TEXTURE_RECT_INDEX)
1156 #define TEXTURE_1D_ARRAY_BIT (1 << TEXTURE_1D_ARRAY_INDEX)
1157 #define TEXTURE_2D_ARRAY_BIT (1 << TEXTURE_2D_ARRAY_INDEX)
1158 /*@}*/
1159
1160
1161 /**
1162  * TexGenEnabled flags.
1163  */
1164 /*@{*/
1165 #define S_BIT 1
1166 #define T_BIT 2
1167 #define R_BIT 4
1168 #define Q_BIT 8
1169 /*@}*/
1170
1171
1172 /**
1173  * Bit flag versions of the corresponding GL_ constants.
1174  */
1175 /*@{*/
1176 #define TEXGEN_SPHERE_MAP        0x1
1177 #define TEXGEN_OBJ_LINEAR        0x2
1178 #define TEXGEN_EYE_LINEAR        0x4
1179 #define TEXGEN_REFLECTION_MAP_NV 0x8
1180 #define TEXGEN_NORMAL_MAP_NV     0x10
1181
1182 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1183                                   TEXGEN_REFLECTION_MAP_NV | \
1184                                   TEXGEN_NORMAL_MAP_NV)
1185 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1186                                   TEXGEN_REFLECTION_MAP_NV | \
1187                                   TEXGEN_NORMAL_MAP_NV     | \
1188                                   TEXGEN_EYE_LINEAR)
1189 /*@}*/
1190
1191
1192 /* A selection of state flags to make driver and module's lives easier. */
1193 #define ENABLE_TEXGEN0        0x1
1194 #define ENABLE_TEXGEN1        0x2
1195 #define ENABLE_TEXGEN2        0x4
1196 #define ENABLE_TEXGEN3        0x8
1197 #define ENABLE_TEXGEN4        0x10
1198 #define ENABLE_TEXGEN5        0x20
1199 #define ENABLE_TEXGEN6        0x40
1200 #define ENABLE_TEXGEN7        0x80
1201
1202 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1203 #define ENABLE_TEXMAT1        0x2
1204 #define ENABLE_TEXMAT2        0x4
1205 #define ENABLE_TEXMAT3        0x8
1206 #define ENABLE_TEXMAT4        0x10
1207 #define ENABLE_TEXMAT5        0x20
1208 #define ENABLE_TEXMAT6        0x40
1209 #define ENABLE_TEXMAT7        0x80
1210
1211 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1212 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1213
1214
1215 /**
1216  * Texel fetch function prototype.  We use texel fetch functions to
1217  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1218  * texture images.  These functions help to isolate us from the gritty
1219  * details of all the various texture image encodings.
1220  *
1221  * \param texImage texture image.
1222  * \param col texel column.
1223  * \param row texel row.
1224  * \param img texel image level/layer.
1225  * \param texelOut output texel (up to 4 GLchans)
1226  */
1227 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1228                                  GLint col, GLint row, GLint img,
1229                                  GLchan *texelOut );
1230
1231 /**
1232  * As above, but returns floats.
1233  * Used for depth component images and for upcoming signed/float
1234  * texture images.
1235  */
1236 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1237                                  GLint col, GLint row, GLint img,
1238                                  GLfloat *texelOut );
1239
1240
1241 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1242                                GLint col, GLint row, GLint img,
1243                                const void *texel);
1244
1245
1246 /**
1247  * This macro defines the (many) parameters to the texstore functions.
1248  * \param dims  either 1 or 2 or 3
1249  * \param baseInternalFormat  user-specified base internal format
1250  * \param dstFormat  destination Mesa texture format
1251  * \param dstAddr  destination image address
1252  * \param dstX/Y/Zoffset  destination x/y/z offset (ala TexSubImage), in texels
1253  * \param dstRowStride  destination image row stride, in bytes
1254  * \param dstImageOffsets  offset of each 2D slice within 3D texture, in texels
1255  * \param srcWidth/Height/Depth  source image size, in pixels
1256  * \param srcFormat  incoming image format
1257  * \param srcType  incoming image data type
1258  * \param srcAddr  source image address
1259  * \param srcPacking  source image packing parameters
1260  */
1261 #define TEXSTORE_PARAMS \
1262         GLcontext *ctx, GLuint dims, \
1263         GLenum baseInternalFormat, \
1264         const struct gl_texture_format *dstFormat, \
1265         GLvoid *dstAddr, \
1266         GLint dstXoffset, GLint dstYoffset, GLint dstZoffset, \
1267         GLint dstRowStride, const GLuint *dstImageOffsets, \
1268         GLint srcWidth, GLint srcHeight, GLint srcDepth, \
1269         GLenum srcFormat, GLenum srcType, \
1270         const GLvoid *srcAddr, \
1271         const struct gl_pixelstore_attrib *srcPacking
1272
1273
1274
1275 /**
1276  * Texture image storage function.
1277  */
1278 typedef GLboolean (*StoreTexImageFunc)(TEXSTORE_PARAMS);
1279
1280
1281 /**
1282  * Texture format record
1283  */
1284 struct gl_texture_format
1285 {
1286    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1287
1288    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1289                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1290                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1291                                  *   GL_DEPTH_COMPONENT.
1292                                  */
1293    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1294
1295    /**
1296     * Bits per texel component.  These are just rough approximations
1297     * for compressed texture formats.
1298     */
1299    /*@{*/
1300    GLubyte RedBits;
1301    GLubyte GreenBits;
1302    GLubyte BlueBits;
1303    GLubyte AlphaBits;
1304    GLubyte LuminanceBits;
1305    GLubyte IntensityBits;
1306    GLubyte IndexBits;
1307    GLubyte DepthBits;
1308    GLubyte StencilBits;         /**< GL_EXT_packed_depth_stencil */
1309    /*@}*/
1310
1311    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1312
1313    StoreTexImageFunc StoreImage;
1314
1315    /**
1316     * \name Texel fetch function pointers
1317     */
1318    /*@{*/
1319    FetchTexelFuncC FetchTexel1D;
1320    FetchTexelFuncC FetchTexel2D;
1321    FetchTexelFuncC FetchTexel3D;
1322    FetchTexelFuncF FetchTexel1Df;
1323    FetchTexelFuncF FetchTexel2Df;
1324    FetchTexelFuncF FetchTexel3Df;
1325    /*@}*/
1326
1327    StoreTexelFunc StoreTexel;
1328 };
1329
1330
1331 /**
1332  * Texture image state.  Describes the dimensions of a texture image,
1333  * the texel format and pointers to Texel Fetch functions.
1334  */
1335 struct gl_texture_image
1336 {
1337    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1338                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1339                                  *   GL_INTENSITY, GL_COLOR_INDEX,
1340                                  *   GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT
1341                                  *   only. Used for choosing TexEnv arithmetic.
1342                                  */
1343    GLint InternalFormat;        /**< Internal format as given by the user */
1344    GLuint Border;               /**< 0 or 1 */
1345    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1346    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1347    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1348    GLuint Width2;               /**< = Width - 2*Border */
1349    GLuint Height2;              /**< = Height - 2*Border */
1350    GLuint Depth2;               /**< = Depth - 2*Border */
1351    GLuint WidthLog2;            /**< = log2(Width2) */
1352    GLuint HeightLog2;           /**< = log2(Height2) */
1353    GLuint DepthLog2;            /**< = log2(Depth2) */
1354    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1355    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1356    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1357    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1358    GLboolean IsClientData;      /**< Data owned by client? */
1359    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1360
1361    const struct gl_texture_format *TexFormat;
1362
1363    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1364
1365    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1366    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1367
1368    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1369    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1370
1371    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1372    GLuint *ImageOffsets;        /**< if 3D texture: array [Depth] of offsets to
1373                                      each 2D slice in 'Data', in texels */
1374    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1375
1376    /**
1377     * \name For device driver:
1378     */
1379    /*@{*/
1380    void *DriverData;            /**< Arbitrary device driver data */
1381    /*@}*/
1382 };
1383
1384
1385 /**
1386  * Indexes for cube map faces.
1387  */
1388 /*@{*/
1389 #define FACE_POS_X   0
1390 #define FACE_NEG_X   1
1391 #define FACE_POS_Y   2
1392 #define FACE_NEG_Y   3
1393 #define FACE_POS_Z   4
1394 #define FACE_NEG_Z   5
1395 #define MAX_FACES    6
1396 /*@}*/
1397
1398
1399 /**
1400  * Texture object state.  Contains the array of mipmap images, border color,
1401  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1402  * color palette.
1403  */
1404 struct gl_texture_object
1405 {
1406    GLint RefCount;              /**< reference count */
1407    GLuint Name;                 /**< the user-visible texture object ID */
1408    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1409    GLfloat Priority;            /**< in [0,1] */
1410    GLfloat BorderColor[4];      /**< unclamped */
1411    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1412    GLenum WrapS;                /**< S-axis texture image wrap mode */
1413    GLenum WrapT;                /**< T-axis texture image wrap mode */
1414    GLenum WrapR;                /**< R-axis texture image wrap mode */
1415    GLenum MinFilter;            /**< minification filter */
1416    GLenum MagFilter;            /**< magnification filter */
1417    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1418    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1419    GLfloat LodBias;             /**< OpenGL 1.4 */
1420    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1421    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1422    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1423    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1424    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1425    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1426    GLenum CompareMode;          /**< GL_ARB_shadow */
1427    GLenum CompareFunc;          /**< GL_ARB_shadow */
1428    GLenum _Function;            /**< Comparison function derived from
1429                                  * \c CompareOperator, \c CompareMode, and
1430                                  * \c CompareFunc.
1431                                  */
1432    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1433    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1434    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1435    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1436    GLboolean _Complete;         /**< Is texture object complete? */
1437
1438    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1439    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1440
1441    /** GL_EXT_paletted_texture */
1442    struct gl_color_table Palette;
1443
1444
1445    /**
1446     * \name For device driver.
1447     * Note: instead of attaching driver data to this pointer, it's preferable
1448     * to instead use this struct as a base class for your own texture object
1449     * class.  Driver->NewTextureObject() can be used to implement the
1450     * allocation.
1451     */
1452    void *DriverData;    /**< Arbitrary device driver data */
1453 };
1454
1455
1456 /**
1457  * Texture combine environment state.
1458  *
1459  * \todo
1460  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1461  * structure will need to be expanded for 4 elements.
1462  */
1463 struct gl_tex_env_combine_state
1464 {
1465    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1466    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1467    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1468    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1469    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1470    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1471    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1472    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1473    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1474    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1475 };
1476
1477
1478 /**
1479  * Texture unit state.  Contains enable flags, texture environment/function/
1480  * combiners, texgen state, pointers to current texture objects and
1481  * post-filter color tables.
1482  */
1483 struct gl_texture_unit
1484 {
1485    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1486    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1487
1488    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1489    GLfloat EnvColor[4];
1490    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1491    /** \name Tex coord generation mode
1492     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1493    /*@{*/
1494    GLenum GenModeS;
1495    GLenum GenModeT;
1496    GLenum GenModeR;
1497    GLenum GenModeQ;
1498    /*@}*/
1499    GLbitfield _GenBitS;
1500    GLbitfield _GenBitT;
1501    GLbitfield _GenBitR;
1502    GLbitfield _GenBitQ;
1503    GLbitfield _GenFlags;        /**< bitwise or of _GenBit[STRQ] */
1504    GLfloat ObjectPlaneS[4];
1505    GLfloat ObjectPlaneT[4];
1506    GLfloat ObjectPlaneR[4];
1507    GLfloat ObjectPlaneQ[4];
1508    GLfloat EyePlaneS[4];
1509    GLfloat EyePlaneT[4];
1510    GLfloat EyePlaneR[4];
1511    GLfloat EyePlaneQ[4];
1512    GLfloat LodBias;             /**< for biasing mipmap levels */
1513
1514    /**
1515     * \name GL_EXT_texture_env_combine
1516     */
1517    struct gl_tex_env_combine_state Combine;
1518
1519    /**
1520     * Derived state based on \c EnvMode and the \c BaseFormat of the
1521     * currently enabled texture.
1522     */
1523    struct gl_tex_env_combine_state _EnvMode;
1524
1525    /**
1526     * Currently enabled combiner state.  This will point to either
1527     * \c Combine or \c _EnvMode.
1528     */
1529    struct gl_tex_env_combine_state *_CurrentCombine;
1530
1531    struct gl_texture_object *Current1D;
1532    struct gl_texture_object *Current2D;
1533    struct gl_texture_object *Current3D;
1534    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1535    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1536    struct gl_texture_object *Current1DArray; /**< GL_MESA_texture_array */
1537    struct gl_texture_object *Current2DArray; /**< GL_MESA_texture_array */
1538
1539    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1540
1541    /** These are used for glPush/PopAttrib */
1542    /*@{*/
1543    struct gl_texture_object Saved1D;
1544    struct gl_texture_object Saved2D;
1545    struct gl_texture_object Saved3D;
1546    struct gl_texture_object SavedCubeMap;
1547    struct gl_texture_object SavedRect;
1548    struct gl_texture_object Saved1DArray;
1549    struct gl_texture_object Saved2DArray;
1550    /*@}*/
1551
1552    /** GL_SGI_texture_color_table */
1553    /*@{*/
1554    struct gl_color_table ColorTable;
1555    struct gl_color_table ProxyColorTable;
1556    GLboolean ColorTableEnabled;
1557    /*@}*/
1558 };
1559
1560
1561 /**
1562  * Texture attribute group (GL_TEXTURE_BIT).
1563  */
1564 struct gl_texture_attrib
1565 {
1566    /**
1567     * name multitexture
1568     */
1569    /**@{*/
1570    GLuint CurrentUnit;         /**< Active texture unit */
1571    GLbitfield _EnabledUnits;  /**< one bit set for each really-enabled unit */
1572    GLbitfield _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1573    GLbitfield _GenFlags;            /**< for texgen */
1574    GLbitfield _TexGenEnabled;
1575    GLbitfield _TexMatEnabled;
1576    /**@}*/
1577
1578    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1579
1580    struct gl_texture_object *Proxy1D;
1581    struct gl_texture_object *Proxy2D;
1582    struct gl_texture_object *Proxy3D;
1583    struct gl_texture_object *ProxyCubeMap;
1584    struct gl_texture_object *ProxyRect;
1585    struct gl_texture_object *Proxy1DArray;
1586    struct gl_texture_object *Proxy2DArray;
1587
1588    /** GL_EXT_shared_texture_palette */
1589    GLboolean SharedPalette;
1590    struct gl_color_table Palette;
1591 };
1592
1593
1594 /**
1595  * Transformation attribute group (GL_TRANSFORM_BIT).
1596  */
1597 struct gl_transform_attrib
1598 {
1599    GLenum MatrixMode;                           /**< Matrix mode */
1600    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1601    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1602    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1603    GLboolean Normalize;                         /**< Normalize all normals? */
1604    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1605    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1606
1607    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1608    GLfloat CullEyePos[4];
1609    GLfloat CullObjPos[4];
1610 };
1611
1612
1613 /**
1614  * Viewport attribute group (GL_VIEWPORT_BIT).
1615  */
1616 struct gl_viewport_attrib
1617 {
1618    GLint X, Y;                  /**< position */
1619    GLsizei Width, Height;       /**< size */
1620    GLfloat Near, Far;           /**< Depth buffer range */
1621    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1622 };
1623
1624
1625 /**
1626  * Node for the attribute stack.
1627  */
1628 struct gl_attrib_node
1629 {
1630    GLbitfield kind;
1631    void *data;
1632    struct gl_attrib_node *next;
1633 };
1634
1635
1636 /**
1637  * GL_ARB_vertex/pixel_buffer_object buffer object
1638  */
1639 struct gl_buffer_object
1640 {
1641    GLint RefCount;
1642    GLuint Name;
1643    GLenum Usage;
1644    GLenum Access;
1645    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1646    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1647    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1648    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1649 };
1650
1651
1652
1653 /**
1654  * Client pixel packing/unpacking attributes
1655  */
1656 struct gl_pixelstore_attrib
1657 {
1658    GLint Alignment;
1659    GLint RowLength;
1660    GLint SkipPixels;
1661    GLint SkipRows;
1662    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1663    GLint SkipImages;      /**< for GL_EXT_texture3D */
1664    GLboolean SwapBytes;
1665    GLboolean LsbFirst;
1666    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1667    GLboolean Invert;        /**< GL_MESA_pack_invert */
1668    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1669 };
1670
1671
1672
1673 /**
1674  * Client vertex array attributes
1675  */
1676 struct gl_client_array
1677 {
1678    GLint Size;                  /**< components per element (1,2,3,4) */
1679    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1680    GLsizei Stride;              /**< user-specified stride */
1681    GLsizei StrideB;             /**< actual stride in bytes */
1682    const GLubyte *Ptr;          /**< Points to array data */
1683    GLboolean Enabled;           /**< Enabled flag is a boolean */
1684    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1685
1686    /**< GL_ARB_vertex_buffer_object */
1687    struct gl_buffer_object *BufferObj;
1688    GLuint _MaxElement;
1689 };
1690
1691
1692 /**
1693  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1694  * extension, but a nice encapsulation in any case.
1695  */
1696 struct gl_array_object
1697 {
1698    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1699    GLuint Name;
1700
1701    /** Conventional vertex arrays */
1702    /*@{*/
1703    struct gl_client_array Vertex;
1704    struct gl_client_array Normal;
1705    struct gl_client_array Color;
1706    struct gl_client_array SecondaryColor;
1707    struct gl_client_array FogCoord;
1708    struct gl_client_array Index;
1709    struct gl_client_array EdgeFlag;
1710    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1711    /*@}*/
1712
1713    /** Generic arrays for vertex programs/shaders */
1714    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1715
1716    /** Mask of _NEW_ARRAY_* values indicating which arrays are enabled */
1717    GLbitfield _Enabled;
1718 };
1719
1720
1721 /**
1722  * Vertex array state
1723  */
1724 struct gl_array_attrib
1725 {
1726    struct gl_array_object *ArrayObj;
1727    struct gl_array_object *DefaultArrayObj;
1728
1729    GLint ActiveTexture;         /**< Client Active Texture */
1730    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1731    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1732
1733    GLbitfield NewState;         /**< mask of _NEW_ARRAY_* values */
1734
1735 #if FEATURE_ARB_vertex_buffer_object
1736    struct gl_buffer_object *NullBufferObj;
1737    struct gl_buffer_object *ArrayBufferObj;
1738    struct gl_buffer_object *ElementArrayBufferObj;
1739 #endif
1740    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1741 };
1742
1743
1744 /**
1745  * Feedback buffer state
1746  */
1747 struct gl_feedback
1748 {
1749    GLenum Type;
1750    GLbitfield _Mask;            /* FB_* bits */
1751    GLfloat *Buffer;
1752    GLuint BufferSize;
1753    GLuint Count;
1754 };
1755
1756
1757 /**
1758  * Selection buffer state
1759  */
1760 struct gl_selection
1761 {
1762    GLuint *Buffer;      /**< selection buffer */
1763    GLuint BufferSize;   /**< size of the selection buffer */
1764    GLuint BufferCount;  /**< number of values in the selection buffer */
1765    GLuint Hits;         /**< number of records in the selection buffer */
1766    GLuint NameStackDepth; /**< name stack depth */
1767    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1768    GLboolean HitFlag;   /**< hit flag */
1769    GLfloat HitMinZ;     /**< minimum hit depth */
1770    GLfloat HitMaxZ;     /**< maximum hit depth */
1771 };
1772
1773
1774 /**
1775  * 1-D Evaluator control points
1776  */
1777 struct gl_1d_map
1778 {
1779    GLuint Order;        /**< Number of control points */
1780    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1781    GLfloat *Points;     /**< Points to contiguous control points */
1782 };
1783
1784
1785 /**
1786  * 2-D Evaluator control points
1787  */
1788 struct gl_2d_map
1789 {
1790    GLuint Uorder;               /**< Number of control points in U dimension */
1791    GLuint Vorder;               /**< Number of control points in V dimension */
1792    GLfloat u1, u2, du;
1793    GLfloat v1, v2, dv;
1794    GLfloat *Points;             /**< Points to contiguous control points */
1795 };
1796
1797
1798 /**
1799  * All evaluator control point state
1800  */
1801 struct gl_evaluators
1802 {
1803    /**
1804     * \name 1-D maps
1805     */
1806    /*@{*/
1807    struct gl_1d_map Map1Vertex3;
1808    struct gl_1d_map Map1Vertex4;
1809    struct gl_1d_map Map1Index;
1810    struct gl_1d_map Map1Color4;
1811    struct gl_1d_map Map1Normal;
1812    struct gl_1d_map Map1Texture1;
1813    struct gl_1d_map Map1Texture2;
1814    struct gl_1d_map Map1Texture3;
1815    struct gl_1d_map Map1Texture4;
1816    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1817    /*@}*/
1818
1819    /**
1820     * \name 2-D maps
1821     */
1822    /*@{*/
1823    struct gl_2d_map Map2Vertex3;
1824    struct gl_2d_map Map2Vertex4;
1825    struct gl_2d_map Map2Index;
1826    struct gl_2d_map Map2Color4;
1827    struct gl_2d_map Map2Normal;
1828    struct gl_2d_map Map2Texture1;
1829    struct gl_2d_map Map2Texture2;
1830    struct gl_2d_map Map2Texture3;
1831    struct gl_2d_map Map2Texture4;
1832    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1833    /*@}*/
1834 };
1835
1836
1837 /**
1838  * Names of the various vertex/fragment program register files, etc.
1839  *
1840  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1841  * All values should fit in a 4-bit field.
1842  *
1843  * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
1844  * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
1845  * be "uniform" variables since they can only be set outside glBegin/End.
1846  * They're also all stored in the same Parameters array.
1847  */
1848 enum register_file
1849 {
1850    PROGRAM_TEMPORARY = 0,   /**< machine->Temporary[] */
1851    PROGRAM_LOCAL_PARAM = 1, /**< gl_program->LocalParams[] */
1852    PROGRAM_ENV_PARAM = 2,   /**< gl_program->Parameters[] */
1853    PROGRAM_STATE_VAR = 3,   /**< gl_program->Parameters[] */
1854    PROGRAM_INPUT = 4,       /**< machine->Inputs[] */
1855    PROGRAM_OUTPUT = 5,      /**< machine->Outputs[] */
1856    PROGRAM_NAMED_PARAM = 6, /**< gl_program->Parameters[] */
1857    PROGRAM_CONSTANT = 7,    /**< gl_program->Parameters[] */
1858    PROGRAM_UNIFORM = 8,     /**< gl_program->Parameters[] */
1859    PROGRAM_VARYING = 9,     /**< machine->Inputs[]/Outputs[] */
1860    PROGRAM_WRITE_ONLY = 10, /**< A dummy, write-only register */
1861    PROGRAM_ADDRESS = 11,    /**< machine->AddressReg */
1862    PROGRAM_SAMPLER = 12,    /**< for shader samplers, compile-time only */
1863    PROGRAM_UNDEFINED = 13,  /**< Invalid value */
1864    PROGRAM_FILE_MAX
1865 };
1866
1867
1868 /** Vertex and fragment instructions */
1869 struct prog_instruction;
1870 struct gl_program_parameter_list;
1871
1872
1873 /**
1874  * Base class for any kind of program object
1875  */
1876 struct gl_program
1877 {
1878    GLuint Id;
1879    GLubyte *String;  /**< Null-terminated program text */
1880    GLint RefCount;
1881    GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
1882    GLenum Format;    /**< String encoding format */
1883    GLboolean Resident;
1884
1885    struct prog_instruction *Instructions;
1886
1887    GLbitfield InputsRead;     /**< Bitmask of which input regs are read */
1888    GLbitfield OutputsWritten; /**< Bitmask of which output regs are written to */
1889    GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1890    GLbitfield SamplersUsed;   /**< Bitfield of which samplers are used */
1891    GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */
1892
1893    /** Named parameters, constants, etc. from program text */
1894    struct gl_program_parameter_list *Parameters;
1895    /** Numbered local parameters */
1896    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1897
1898    /** Vertex/fragment shader varying vars */
1899    struct gl_program_parameter_list *Varying;
1900    /** Vertex program user-defined attributes */
1901    struct gl_program_parameter_list *Attributes;
1902
1903    /** Map from sampler unit to texture unit (set by glUniform1i()) */
1904    GLubyte SamplerUnits[MAX_SAMPLERS];
1905    /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
1906    GLubyte SamplerTargets[MAX_SAMPLERS];
1907
1908    /** Logical counts */
1909    /*@{*/
1910    GLuint NumInstructions;
1911    GLuint NumTemporaries;
1912    GLuint NumParameters;
1913    GLuint NumAttributes;
1914    GLuint NumAddressRegs;
1915    GLuint NumAluInstructions;
1916    GLuint NumTexInstructions;
1917    GLuint NumTexIndirections;
1918    /*@}*/
1919    /** Native, actual h/w counts */
1920    /*@{*/
1921    GLuint NumNativeInstructions;
1922    GLuint NumNativeTemporaries;
1923    GLuint NumNativeParameters;
1924    GLuint NumNativeAttributes;
1925    GLuint NumNativeAddressRegs;
1926    GLuint NumNativeAluInstructions;
1927    GLuint NumNativeTexInstructions;
1928    GLuint NumNativeTexIndirections;
1929    /*@}*/
1930 };
1931
1932
1933 /** Vertex program object */
1934 struct gl_vertex_program
1935 {
1936    struct gl_program Base;   /**< base class */
1937    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1938    GLboolean IsPositionInvariant;
1939    void *TnlData;               /**< should probably use Base.DriverData */
1940 };
1941
1942
1943 /** Fragment program object */
1944 struct gl_fragment_program
1945 {
1946    struct gl_program Base;   /**< base class */
1947    GLenum FogOption;
1948    GLboolean UsesKill;
1949 };
1950
1951
1952 /**
1953  * State common to vertex and fragment programs.
1954  */
1955 struct gl_program_state
1956 {
1957    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1958    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1959 };
1960
1961
1962 /**
1963  * Context state for vertex programs.
1964  */
1965 struct gl_vertex_program_state
1966 {
1967    GLboolean Enabled;               /**< GL_VERTEX_PROGRAM_ARB/NV */
1968    GLboolean _Enabled;              /**< Enabled and valid program? */
1969    GLboolean PointSizeEnabled;      /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1970    GLboolean TwoSideEnabled;        /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1971    struct gl_vertex_program *Current;  /**< user-bound vertex program */
1972
1973    /** Currently enabled and valid program (including internal programs
1974     * and compiled shader programs).
1975     */
1976    struct gl_vertex_program *_Current;
1977
1978    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1979
1980    /* For GL_NV_vertex_program only: */
1981    GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
1982    GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];
1983
1984    /** Should fixed-function T&L be implemented with a vertex prog? */
1985    GLboolean _MaintainTnlProgram;
1986
1987    /** Program to emulate fixed-function T&L (see above) */
1988    struct gl_vertex_program *_TnlProgram;
1989
1990    /** Cache of fixed-function programs */
1991    struct gl_program_cache *Cache;
1992
1993 #if FEATURE_MESA_program_debug
1994    GLprogramcallbackMESA Callback;
1995    GLvoid *CallbackData;
1996    GLboolean CallbackEnabled;
1997    GLuint CurrentPosition;
1998 #endif
1999 };
2000
2001
2002 /**
2003  * Context state for fragment programs.
2004  */
2005 struct gl_fragment_program_state
2006 {
2007    GLboolean Enabled;     /**< User-set fragment program enable flag */
2008    GLboolean _Enabled;    /**< Fragment program enabled and valid? */
2009    GLboolean _Active;
2010    struct gl_fragment_program *Current;  /**< User-bound fragment program */
2011
2012    /** Currently enabled and valid program (including internal programs
2013     * and compiled shader programs).
2014     */
2015    struct gl_fragment_program *_Current;
2016
2017    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
2018
2019    /** Should fixed-function texturing be implemented with a fragment prog? */
2020    GLboolean _MaintainTexEnvProgram;
2021    GLboolean _UseTexEnvProgram;
2022
2023    /** Program to emulate fixed-function texture env/combine (see above) */
2024    struct gl_fragment_program *_TexEnvProgram;
2025
2026    /** Cache of fixed-function programs */
2027    struct gl_program_cache *Cache;
2028
2029 #if FEATURE_MESA_program_debug
2030    GLprogramcallbackMESA Callback;
2031    GLvoid *CallbackData;
2032    GLboolean CallbackEnabled;
2033    GLuint CurrentPosition;
2034 #endif
2035 };
2036
2037
2038 /**
2039  * ATI_fragment_shader runtime state
2040  */
2041 #define ATI_FS_INPUT_PRIMARY 0
2042 #define ATI_FS_INPUT_SECONDARY 1
2043
2044 struct atifs_instruction;
2045 struct atifs_setupinst;
2046
2047 /**
2048  * ATI fragment shader
2049  */
2050 struct ati_fragment_shader
2051 {
2052    GLuint Id;
2053    GLint RefCount;
2054    struct atifs_instruction *Instructions[2];
2055    struct atifs_setupinst *SetupInst[2];
2056    GLfloat Constants[8][4];
2057    GLbitfield LocalConstDef;  /** Indicates which constants have been set */
2058    GLubyte numArithInstr[2];
2059    GLubyte regsAssigned[2];
2060    GLubyte NumPasses;         /** 1 or 2 */
2061    GLubyte cur_pass;
2062    GLubyte last_optype;
2063    GLboolean interpinp1;
2064    GLboolean isValid;
2065    GLuint swizzlerq;
2066 };
2067
2068 /**
2069  * Context state for GL_ATI_fragment_shader
2070  */
2071 struct gl_ati_fragment_shader_state
2072 {
2073    GLboolean Enabled;
2074    GLboolean _Enabled;                      /** enabled and valid shader? */
2075    GLboolean Compiling;
2076    GLfloat GlobalConstants[8][4];
2077    struct ati_fragment_shader *Current;
2078 };
2079
2080
2081 /**
2082  * Occlusion/timer query object.
2083  */
2084 struct gl_query_object
2085 {
2086    GLenum Target;      /**< The query target, when active */
2087    GLuint Id;          /**< hash table ID/name */
2088    GLuint64EXT Result; /**< the counter */
2089    GLboolean Active;   /**< inside Begin/EndQuery */
2090    GLboolean Ready;    /**< result is ready? */
2091 };
2092
2093
2094 /**
2095  * Context state for query objects.
2096  */
2097 struct gl_query_state
2098 {
2099    struct _mesa_HashTable *QueryObjects;
2100    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
2101    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
2102 };
2103
2104
2105
2106 /**
2107  * A GLSL shader object.
2108  */
2109 struct gl_shader
2110 {
2111    GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER (first field!) */
2112    GLuint Name;  /**< AKA the handle */
2113    GLint RefCount;  /**< Reference count */
2114    GLboolean DeletePending;
2115
2116    const GLchar *Source;  /**< Source code string */
2117    GLboolean CompileStatus;
2118    GLuint NumPrograms;  /**< size of Programs[] array */
2119    struct gl_program **Programs;  /**< Post-compile assembly code */
2120    GLchar *InfoLog;
2121 };
2122
2123
2124 /**
2125  * A GLSL program object.  Basically a linked collection of "shaders".
2126  */
2127 struct gl_shader_program
2128 {
2129    GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
2130    GLuint Name;  /**< aka handle or ID */
2131    GLint RefCount;  /**< Reference count */
2132    GLboolean DeletePending;
2133
2134    GLuint NumShaders;          /**< number of attached shaders */
2135    struct gl_shader **Shaders; /**< List of attached the shaders */
2136
2137    /* post-link info: */
2138    struct gl_vertex_program *VertexProgram;     /**< Linked vertex program */
2139    struct gl_fragment_program *FragmentProgram; /**< Linked fragment prog */
2140    struct gl_program_parameter_list *Uniforms; /**< Plus constants, etc */
2141    struct gl_program_parameter_list *Varying;
2142    struct gl_program_parameter_list *Attributes; /**< Vertex attributes */
2143    GLboolean LinkStatus;   /**< GL_LINK_STATUS */
2144    GLboolean Validated;
2145    GLchar *InfoLog;
2146 };
2147
2148
2149 /**
2150  * Context state for GLSL vertex/fragment shaders.
2151  */
2152 struct gl_shader_state
2153 {
2154    struct gl_shader_program *CurrentProgram; /**< The user-bound program */
2155    /** Driver-selectable options: */
2156    GLboolean EmitHighLevelInstructions; /**< IF/ELSE/ENDIF vs. BRA, etc. */
2157    GLboolean EmitCondCodes;             /**< Use condition codes? */
2158    GLboolean EmitComments;              /**< Annotated instructions */
2159    void *MemPool;
2160 };
2161
2162
2163 /**
2164  * State which can be shared by multiple contexts:
2165  */
2166 struct gl_shared_state
2167 {
2168    _glthread_Mutex Mutex;                  /**< for thread safety */
2169    GLint RefCount;                         /**< Reference count */
2170    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2171    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2172
2173    /**
2174     * \name Default texture objects (shared by all multi-texture units)
2175     */
2176    /*@{*/
2177    struct gl_texture_object *Default1D;
2178    struct gl_texture_object *Default2D;
2179    struct gl_texture_object *Default3D;
2180    struct gl_texture_object *DefaultCubeMap;
2181    struct gl_texture_object *DefaultRect;
2182    struct gl_texture_object *Default1DArray;
2183    struct gl_texture_object *Default2DArray;
2184    /*@}*/
2185
2186    /**
2187     * \name Thread safety and statechange notification for texture
2188     * objects.
2189     *
2190     * \todo Improve the granularity of locking.
2191     */
2192    /*@{*/
2193    _glthread_Mutex TexMutex;            /**< texobj thread safety */
2194    GLuint TextureStateStamp;            /**< state notification for shared tex */
2195    /*@}*/
2196
2197
2198    /**
2199     * \name Vertex/fragment programs
2200     */
2201    /*@{*/
2202    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2203 #if FEATURE_ARB_vertex_program
2204    struct gl_program *DefaultVertexProgram;
2205 #endif
2206 #if FEATURE_ARB_fragment_program
2207    struct gl_program *DefaultFragmentProgram;
2208 #endif
2209    /*@}*/
2210
2211 #if FEATURE_ATI_fragment_shader
2212    struct _mesa_HashTable *ATIShaders;
2213    struct ati_fragment_shader *DefaultFragmentShader;
2214 #endif
2215
2216 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2217    struct _mesa_HashTable *BufferObjects;
2218 #endif
2219
2220 #if FEATURE_ARB_shader_objects
2221    /** Table of both gl_shader and gl_shader_program objects */
2222    struct _mesa_HashTable *ShaderObjects;
2223 #endif
2224
2225 #if FEATURE_EXT_framebuffer_object
2226    struct _mesa_HashTable *RenderBuffers;
2227    struct _mesa_HashTable *FrameBuffers;
2228 #endif
2229
2230    /** Objects associated with the GL_APPLE_vertex_array_object extension. */
2231    struct _mesa_HashTable *ArrayObjects;
2232
2233    void *DriverData;  /**< Device driver shared state */
2234 };
2235
2236
2237
2238
2239 /**
2240  * A renderbuffer stores colors or depth values or stencil values.
2241  * A framebuffer object will have a collection of these.
2242  * Data are read/written to the buffer with a handful of Get/Put functions.
2243  *
2244  * Instances of this object are allocated with the Driver's NewRenderbuffer
2245  * hook.  Drivers will likely wrap this class inside a driver-specific
2246  * class to simulate inheritance.
2247  */
2248 struct gl_renderbuffer
2249 {
2250 #define RB_MAGIC 0xaabbccdd
2251    int Magic; /** XXX TEMPORARY DEBUG INFO */
2252    _glthread_Mutex Mutex;                  /**< for thread safety */
2253    GLuint ClassID;        /**< Useful for drivers */
2254    GLuint Name;
2255    GLint RefCount;
2256    GLuint Width, Height;
2257    GLenum InternalFormat; /**< The user-specified format */
2258    GLenum _ActualFormat;  /**< The driver-chosen format */
2259    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2260                                GL_STENCIL_INDEX. */
2261    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2262    GLubyte RedBits;      /**< Bits of red per pixel */
2263    GLubyte GreenBits;
2264    GLubyte BlueBits;
2265    GLubyte AlphaBits;
2266    GLubyte IndexBits;
2267    GLubyte DepthBits;
2268    GLubyte StencilBits;
2269    GLvoid *Data;        /**< This may not be used by some kinds of RBs */
2270
2271    /* Used to wrap one renderbuffer around another: */
2272    struct gl_renderbuffer *Wrapped;
2273
2274    /* Delete this renderbuffer */
2275    void (*Delete)(struct gl_renderbuffer *rb);
2276
2277    /* Allocate new storage for this renderbuffer */
2278    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2279                              GLenum internalFormat,
2280                              GLuint width, GLuint height);
2281
2282    /* Lock/Unlock are called before/after calling the Get/Put functions.
2283     * Not sure this is the right place for these yet.
2284    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2285    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2286     */
2287
2288    /* Return a pointer to the element/pixel at (x,y).
2289     * Should return NULL if the buffer memory can't be directly addressed.
2290     */
2291    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2292                        GLint x, GLint y);
2293
2294    /* Get/Read a row of values.
2295     * The values will be of format _BaseFormat and type DataType.
2296     */
2297    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2298                   GLint x, GLint y, void *values);
2299
2300    /* Get/Read values at arbitrary locations.
2301     * The values will be of format _BaseFormat and type DataType.
2302     */
2303    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2304                      const GLint x[], const GLint y[], void *values);
2305
2306    /* Put/Write a row of values.
2307     * The values will be of format _BaseFormat and type DataType.
2308     */
2309    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2310                   GLint x, GLint y, const void *values, const GLubyte *mask);
2311
2312    /* Put/Write a row of RGB values.  This is a special-case routine that's
2313     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2314     * a common case for glDrawPixels and some triangle routines.
2315     * The values will be of format GL_RGB and type DataType.
2316     */
2317    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2318                     GLint x, GLint y, const void *values, const GLubyte *mask);
2319
2320
2321    /* Put/Write a row of identical values.
2322     * The values will be of format _BaseFormat and type DataType.
2323     */
2324    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2325                      GLint x, GLint y, const void *value, const GLubyte *mask);
2326
2327    /* Put/Write values at arbitrary locations.
2328     * The values will be of format _BaseFormat and type DataType.
2329     */
2330    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2331                      const GLint x[], const GLint y[], const void *values,
2332                      const GLubyte *mask);
2333    /* Put/Write identical values at arbitrary locations.
2334     * The values will be of format _BaseFormat and type DataType.
2335     */
2336    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2337                          GLuint count, const GLint x[], const GLint y[],
2338                          const void *value, const GLubyte *mask);
2339 };
2340
2341
2342 /**
2343  * A renderbuffer attachment point points to either a texture object
2344  * (and specifies a mipmap level, cube face or 3D texture slice) or
2345  * points to a renderbuffer.
2346  */
2347 struct gl_renderbuffer_attachment
2348 {
2349    GLenum Type;  /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
2350    GLboolean Complete;
2351
2352    /**
2353     * If \c Type is \c GL_RENDERBUFFER_EXT, this stores a pointer to the
2354     * application supplied renderbuffer object.
2355     */
2356    struct gl_renderbuffer *Renderbuffer;
2357
2358    /**
2359     * If \c Type is \c GL_TEXTURE, this stores a pointer to the application
2360     * supplied texture object.
2361     */
2362    struct gl_texture_object *Texture;
2363    GLuint TextureLevel; /**< Attached mipmap level. */
2364    GLuint CubeMapFace;  /**< 0 .. 5, for cube map textures. */
2365    GLuint Zoffset;      /**< Slice for 3D textures,  or layer for both 1D
2366                          * and 2D array textures */
2367 };
2368
2369
2370 /**
2371  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2372  * In C++ terms, think of this as a base class from which device drivers
2373  * will make derived classes.
2374  */
2375 struct gl_framebuffer
2376 {
2377    _glthread_Mutex Mutex;                  /**< for thread safety */
2378    GLuint Name;      /* if zero, this is a window system framebuffer */
2379    GLint RefCount;
2380    GLboolean DeletePending;
2381
2382    GLvisual Visual;     /**< The framebuffer's visual.
2383                              Immutable if this is a window system buffer.
2384                              Computed from attachments if user-made FBO. */
2385
2386    GLboolean Initialized;
2387
2388    GLuint Width, Height;        /**< size of frame buffer in pixels */
2389
2390    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2391    /*@{*/
2392    GLint _Xmin, _Xmax;  /**< inclusive */
2393    GLint _Ymin, _Ymax;  /**< exclusive */
2394    /*@}*/
2395
2396    /** \name  Derived Z buffer stuff */
2397    /*@{*/
2398    GLuint _DepthMax;    /**< Max depth buffer value */
2399    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2400    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2401    /*@}*/
2402
2403    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2404
2405    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2406    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2407
2408    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2409     * attribute group and GL_PIXEL attribute group, respectively.
2410     */
2411    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2412    GLenum ColorReadBuffer;
2413
2414    /* These are computed from ColorDrawBuffer and ColorReadBuffer */
2415    GLbitfield _ColorDrawBufferMask[MAX_DRAW_BUFFERS]; /* Mask of BUFFER_BIT_* flags */
2416    GLint _ColorReadBufferIndex; /* -1 = None */
2417
2418    /* These are computed from _ColorDrawBufferMask and _ColorReadBufferIndex */
2419    GLuint _NumColorDrawBuffers[MAX_DRAW_BUFFERS];
2420    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS][4];
2421    struct gl_renderbuffer *_ColorReadBuffer;
2422
2423    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2424     * depth/stencil buffers attached above. */
2425    struct gl_renderbuffer *_DepthBuffer;
2426    struct gl_renderbuffer *_StencilBuffer;
2427
2428    /** Delete this framebuffer */
2429    void (*Delete)(struct gl_framebuffer *fb);
2430 };
2431
2432
2433 /**
2434  * Limits for vertex and fragment programs.
2435  */
2436 struct gl_program_constants
2437 {
2438    /* logical limits */
2439    GLuint MaxInstructions;
2440    GLuint MaxAluInstructions; /* fragment programs only, for now */
2441    GLuint MaxTexInstructions; /* fragment programs only, for now */
2442    GLuint MaxTexIndirections; /* fragment programs only, for now */
2443    GLuint MaxAttribs;
2444    GLuint MaxTemps;
2445    GLuint MaxAddressRegs; /* vertex program only, for now */
2446    GLuint MaxParameters;
2447    GLuint MaxLocalParams;
2448    GLuint MaxEnvParams;
2449    /* native/hardware limits */
2450    GLuint MaxNativeInstructions;
2451    GLuint MaxNativeAluInstructions; /* fragment programs only, for now */
2452    GLuint MaxNativeTexInstructions; /* fragment programs only, for now */
2453    GLuint MaxNativeTexIndirections; /* fragment programs only, for now */
2454    GLuint MaxNativeAttribs;
2455    GLuint MaxNativeTemps;
2456    GLuint MaxNativeAddressRegs; /* vertex program only, for now */
2457    GLuint MaxNativeParameters;
2458    /* For shaders */
2459    GLuint MaxUniformComponents;
2460 };
2461
2462
2463 /**
2464  * Constants which may be overridden by device driver during context creation
2465  * but are never changed after that.
2466  */
2467 struct gl_constants
2468 {
2469    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2470    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2471    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2472    GLint MaxArrayTextureLayers;         /**< Maximum number of layers in an array texture. */
2473    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2474    GLuint MaxTextureCoordUnits;
2475    GLuint MaxTextureImageUnits;
2476    GLuint MaxTextureUnits;              /* = MIN(CoordUnits, ImageUnits) */
2477    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2478    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2479    GLuint MaxArrayLockSize;
2480    GLint SubPixelBits;
2481    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2482    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2483    GLfloat PointSizeGranularity;
2484    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2485    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2486    GLfloat LineWidthGranularity;
2487    GLuint MaxColorTableSize;
2488    GLuint MaxConvolutionWidth;
2489    GLuint MaxConvolutionHeight;
2490    GLuint MaxClipPlanes;
2491    GLuint MaxLights;
2492    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2493    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2494    GLuint MaxViewportWidth, MaxViewportHeight;
2495    struct gl_program_constants VertexProgram;    /* GL_ARB_vertex_program */
2496    struct gl_program_constants FragmentProgram;  /* GL_ARB_fragment_program */
2497    /* shared by vertex and fragment program: */
2498    GLuint MaxProgramMatrices;
2499    GLuint MaxProgramMatrixStackDepth;
2500    /* vertex array / buffer object bounds checking */
2501    GLboolean CheckArrayBounds;
2502    /* GL_ARB_draw_buffers */
2503    GLuint MaxDrawBuffers;
2504    /* GL_OES_read_format */
2505    GLenum ColorReadFormat;
2506    GLenum ColorReadType;
2507    /* GL_EXT_framebuffer_object */
2508    GLuint MaxColorAttachments;
2509    GLuint MaxRenderbufferSize;
2510    /* GL_ARB_vertex_shader */
2511    GLuint MaxVertexTextureImageUnits;
2512    GLuint MaxVarying;
2513 };
2514
2515
2516 /**
2517  * Enable flag for each OpenGL extension.  Different device drivers will
2518  * enable different extensions at runtime.
2519  */
2520 struct gl_extensions
2521 {
2522    /**
2523     * \name Flags to quickly test if certain extensions are available.
2524     *
2525     * Not every extension needs to have such a flag, but it's encouraged.
2526     */
2527    /*@{*/
2528    GLboolean dummy;  /* don't remove this! */
2529    GLboolean ARB_depth_texture;
2530    GLboolean ARB_draw_buffers;
2531    GLboolean ARB_fragment_program;
2532    GLboolean ARB_fragment_program_shadow;
2533    GLboolean ARB_fragment_shader;
2534    GLboolean ARB_half_float_pixel;
2535    GLboolean ARB_imaging;
2536    GLboolean ARB_multisample;
2537    GLboolean ARB_multitexture;
2538    GLboolean ARB_occlusion_query;
2539    GLboolean ARB_point_sprite;
2540    GLboolean ARB_shader_objects;
2541    GLboolean ARB_shading_language_100;
2542    GLboolean ARB_shading_language_120;
2543    GLboolean ARB_shadow;
2544    GLboolean ARB_texture_border_clamp;
2545    GLboolean ARB_texture_compression;
2546    GLboolean ARB_texture_cube_map;
2547    GLboolean ARB_texture_env_combine;
2548    GLboolean ARB_texture_env_crossbar;
2549    GLboolean ARB_texture_env_dot3;
2550    GLboolean ARB_texture_float;
2551    GLboolean ARB_texture_mirrored_repeat;
2552    GLboolean ARB_texture_non_power_of_two;
2553    GLboolean ARB_transpose_matrix;
2554    GLboolean ARB_vertex_buffer_object;
2555    GLboolean ARB_vertex_program;
2556    GLboolean ARB_vertex_shader;
2557    GLboolean ARB_window_pos;
2558    GLboolean EXT_abgr;
2559    GLboolean EXT_bgra;
2560    GLboolean EXT_blend_color;
2561    GLboolean EXT_blend_equation_separate;
2562    GLboolean EXT_blend_func_separate;
2563    GLboolean EXT_blend_logic_op;
2564    GLboolean EXT_blend_minmax;
2565    GLboolean EXT_blend_subtract;
2566    GLboolean EXT_clip_volume_hint;
2567    GLboolean EXT_cull_vertex;
2568    GLboolean EXT_convolution;
2569    GLboolean EXT_compiled_vertex_array;
2570    GLboolean EXT_copy_texture;
2571    GLboolean EXT_depth_bounds_test;
2572    GLboolean EXT_draw_range_elements;
2573    GLboolean EXT_framebuffer_object;
2574    GLboolean EXT_fog_coord;
2575    GLboolean EXT_framebuffer_blit;
2576    GLboolean EXT_gpu_program_parameters;
2577    GLboolean EXT_histogram;
2578    GLboolean EXT_multi_draw_arrays;
2579    GLboolean EXT_paletted_texture;
2580    GLboolean EXT_packed_depth_stencil;
2581    GLboolean EXT_packed_pixels;
2582    GLboolean EXT_pixel_buffer_object;
2583    GLboolean EXT_point_parameters;
2584    GLboolean EXT_polygon_offset;
2585    GLboolean EXT_rescale_normal;
2586    GLboolean EXT_shadow_funcs;
2587    GLboolean EXT_secondary_color;
2588    GLboolean EXT_separate_specular_color;
2589    GLboolean EXT_shared_texture_palette;
2590    GLboolean EXT_stencil_wrap;
2591    GLboolean EXT_stencil_two_side;
2592    GLboolean EXT_subtexture;
2593    GLboolean EXT_texture;
2594    GLboolean EXT_texture_object;
2595    GLboolean EXT_texture3D;
2596    GLboolean EXT_texture_compression_s3tc;
2597    GLboolean EXT_texture_env_add;
2598    GLboolean EXT_texture_env_combine;
2599    GLboolean EXT_texture_env_dot3;
2600    GLboolean EXT_texture_filter_anisotropic;
2601    GLboolean EXT_texture_lod_bias;
2602    GLboolean EXT_texture_mirror_clamp;
2603    GLboolean EXT_texture_sRGB;
2604    GLboolean EXT_timer_query;
2605    GLboolean EXT_vertex_array;
2606    GLboolean EXT_vertex_array_set;
2607    /* vendor extensions */
2608    GLboolean APPLE_client_storage;
2609    GLboolean APPLE_packed_pixels;
2610    GLboolean APPLE_vertex_array_object;
2611    GLboolean ATI_texture_mirror_once;
2612    GLboolean ATI_texture_env_combine3;
2613    GLboolean ATI_fragment_shader;
2614    GLboolean ATI_separate_stencil;
2615    GLboolean IBM_rasterpos_clip;
2616    GLboolean IBM_multimode_draw_arrays;
2617    GLboolean MESA_pack_invert;
2618    GLboolean MESA_packed_depth_stencil;
2619    GLboolean MESA_program_debug;
2620    GLboolean MESA_resize_buffers;
2621    GLboolean MESA_ycbcr_texture;
2622    GLboolean MESA_texture_array;
2623    GLboolean NV_blend_square;
2624    GLboolean NV_fragment_program;
2625    GLboolean NV_light_max_exponent;
2626    GLboolean NV_point_sprite;
2627    GLboolean NV_texgen_reflection;
2628    GLboolean NV_texture_rectangle;
2629    GLboolean NV_vertex_program;
2630    GLboolean NV_vertex_program1_1;
2631    GLboolean OES_read_format;
2632    GLboolean SGI_color_matrix;
2633    GLboolean SGI_color_table;
2634    GLboolean SGI_texture_color_table;
2635    GLboolean SGIS_generate_mipmap;
2636    GLboolean SGIS_texture_edge_clamp;
2637    GLboolean SGIS_texture_lod;
2638    GLboolean SGIX_depth_texture;
2639    GLboolean SGIX_shadow;
2640    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2641    GLboolean TDFX_texture_compression_FXT1;
2642    GLboolean S3_s3tc;
2643    /*@}*/
2644    /* The extension string */
2645    const GLubyte *String;
2646 };
2647
2648
2649 /**
2650  * A stack of matrices (projection, modelview, color, texture, etc).
2651  */
2652 struct gl_matrix_stack
2653 {
2654    GLmatrix *Top;      /**< points into Stack */
2655    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2656    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2657    GLuint MaxDepth;    /**< size of Stack[] array */
2658    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2659 };
2660
2661
2662 /**
2663  * \name Bits for image transfer operations
2664  *
2665  * \sa __GLcontextRec::ImageTransferState.
2666  */
2667 /*@{*/
2668 #define IMAGE_SCALE_BIAS_BIT                      0x1
2669 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2670 #define IMAGE_MAP_COLOR_BIT                       0x4
2671 #define IMAGE_COLOR_TABLE_BIT                     0x8
2672 #define IMAGE_CONVOLUTION_BIT                     0x10
2673 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2674 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2675 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2676 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2677 #define IMAGE_HISTOGRAM_BIT                       0x200
2678 #define IMAGE_MIN_MAX_BIT                         0x400
2679 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2680
2681
2682 /** Pixel Transfer ops up to convolution */
2683 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2684                                     IMAGE_SHIFT_OFFSET_BIT |   \
2685                                     IMAGE_MAP_COLOR_BIT |      \
2686                                     IMAGE_COLOR_TABLE_BIT)
2687
2688 /** Pixel transfer ops after convolution */
2689 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2690                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2691                                      IMAGE_COLOR_MATRIX_BIT |                 \
2692                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2693                                      IMAGE_HISTOGRAM_BIT |                    \
2694                                      IMAGE_MIN_MAX_BIT)
2695 /*@}*/
2696
2697
2698 /**
2699  * \name Bits to indicate what state has changed.
2700  *
2701  * 4 unused flags.
2702  */
2703 /*@{*/
2704 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2705 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2706 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2707 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2708 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2709 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2710 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2711 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2712 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2713 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2714 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2715 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2716 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2717 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2718 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2719 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2720 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2721 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2722 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2723 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2724 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2725 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2726 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2727 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2728 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2729 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2730 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2731 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2732 #define _NEW_ALL ~0
2733 /*@}*/
2734
2735
2736 /**
2737  * \name Bits to track array state changes
2738  *
2739  * Also used to summarize array enabled.
2740  */
2741 /*@{*/
2742 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2743 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2744 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2745 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2746 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2747 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2748 #define _NEW_ARRAY_INDEX            VERT_BIT_COLOR_INDEX
2749 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_EDGEFLAG
2750 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2751 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2752 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2753 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2754 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2755 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2756 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2757 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2758 #define _NEW_ARRAY_ATTRIB_0         VERT_BIT_GENERIC0  /* start at bit 16 */
2759 #define _NEW_ARRAY_ALL              0xffffffff
2760
2761
2762 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2763 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2764 /*@}*/
2765
2766
2767 /**
2768  * \name A bunch of flags that we think might be useful to drivers.
2769  *
2770  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2771  */
2772 /*@{*/
2773 #define DD_FLATSHADE                0x1
2774 #define DD_SEPARATE_SPECULAR        0x2
2775 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2776 #define DD_TRI_LIGHT_TWOSIDE        0x8
2777 #define DD_TRI_UNFILLED             0x10
2778 #define DD_TRI_SMOOTH               0x20
2779 #define DD_TRI_STIPPLE              0x40
2780 #define DD_TRI_OFFSET               0x80
2781 #define DD_LINE_SMOOTH              0x100
2782 #define DD_LINE_STIPPLE             0x200
2783 #define DD_LINE_WIDTH               0x400
2784 #define DD_POINT_SMOOTH             0x800
2785 #define DD_POINT_SIZE               0x1000
2786 #define DD_POINT_ATTEN              0x2000
2787 #define DD_TRI_TWOSTENCIL           0x4000
2788 /*@}*/
2789
2790
2791 /**
2792  * \name Define the state changes under which each of these bits might change
2793  */
2794 /*@{*/
2795 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2796 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2797 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2798 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2799 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2800 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2801 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2802 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2803 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2804 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2805 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2806 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2807 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2808 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2809 /*@}*/
2810
2811
2812 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2813                                            _NEW_TEXTURE |       \
2814                                            _NEW_POINT |         \
2815                                            _NEW_PROGRAM |       \
2816                                            _NEW_MODELVIEW)
2817
2818 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2819                                            _NEW_TEXTURE)
2820
2821 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2822
2823
2824
2825
2826 /*
2827  * Forward declaration of display list data types:
2828  */
2829 union node;
2830 typedef union node Node;
2831
2832
2833 /* This has to be included here. */
2834 #include "dd.h"
2835
2836
2837 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2838
2839 /**
2840  * Core Mesa's support for tnl modules:
2841  */
2842 struct gl_tnl_module
2843 {
2844    /**
2845     * Vertex format to be lazily swapped into current dispatch.
2846     */
2847    const GLvertexformat *Current;
2848
2849    /**
2850     * \name Record of functions swapped out.
2851     * On restore, only need to swap these functions back in.
2852     */
2853    /*@{*/
2854    struct {
2855        _glapi_proc * location;
2856        _glapi_proc function;
2857    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2858    GLuint SwapCount;
2859    /*@}*/
2860 };
2861
2862 /* Strictly this is a tnl/ private concept, but it doesn't seem
2863  * worthwhile adding a tnl private structure just to hold this one bit
2864  * of information:
2865  */
2866 #define MESA_DLIST_DANGLING_REFS     0x1
2867
2868 /* Provide a location where information about a display list can be
2869  * collected.  Could be extended with driverPrivate structures,
2870  * etc. in the future.
2871  */
2872 struct mesa_display_list
2873 {
2874    Node *node;
2875    GLuint id;
2876    GLbitfield flags;
2877 };
2878
2879
2880 /**
2881  * State used during display list compilation and execution.
2882  */
2883 struct gl_dlist_state
2884 {
2885    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2886    GLuint CallDepth;            /**< Current recursion calling depth */
2887
2888    struct mesa_display_list *CurrentList;
2889    Node *CurrentListPtr;        /**< Head of list being compiled */
2890    GLuint CurrentListNum;       /**< Number of the list being compiled */
2891    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2892    GLuint CurrentPos;           /**< Index into current block of nodes */
2893
2894    GLvertexformat ListVtxfmt;
2895
2896    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2897    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2898
2899    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2900    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2901
2902    GLubyte ActiveIndex;
2903    GLfloat CurrentIndex;
2904
2905    GLubyte ActiveEdgeFlag;
2906    GLboolean CurrentEdgeFlag;
2907 };
2908
2909
2910 /**
2911  * Mesa rendering context.
2912  *
2913  * This is the central context data structure for Mesa.  Almost all
2914  * OpenGL state is contained in this structure.
2915  * Think of this as a base class from which device drivers will derive
2916  * sub classes.
2917  *
2918  * The GLcontext typedef names this structure.
2919  */
2920 struct __GLcontextRec
2921 {
2922    /** State possibly shared with other contexts in the address space */
2923    struct gl_shared_state *Shared;
2924
2925    /** \name API function pointer tables */
2926    /*@{*/
2927    struct _glapi_table *Save;   /**< Display list save functions */
2928    struct _glapi_table *Exec;   /**< Execute functions */
2929    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2930    /*@}*/
2931
2932    GLvisual Visual;
2933    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2934    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2935    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2936    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2937
2938    /**
2939     * Device driver function pointer table
2940     */
2941    struct dd_function_table Driver;
2942
2943    void *DriverCtx;     /**< Points to device driver context/state */
2944
2945    /** Core/Driver constants */
2946    struct gl_constants Const;
2947
2948    /** \name The various 4x4 matrix stacks */
2949    /*@{*/
2950    struct gl_matrix_stack ModelviewMatrixStack;
2951    struct gl_matrix_stack ProjectionMatrixStack;
2952    struct gl_matrix_stack ColorMatrixStack;
2953    struct gl_matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2954    struct gl_matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2955    struct gl_matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2956    /*@}*/
2957
2958    /** Combined modelview and projection matrix */
2959    GLmatrix _ModelProjectMatrix;
2960
2961    /** \name Display lists */
2962    struct gl_dlist_state ListState;
2963
2964    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2965    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2966
2967    /** Extension information */
2968    struct gl_extensions Extensions;
2969
2970    /** \name State attribute stack (for glPush/PopAttrib) */
2971    /*@{*/
2972    GLuint AttribStackDepth;
2973    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2974    /*@}*/
2975
2976    /** \name Renderer attribute groups
2977     *
2978     * We define a struct for each attribute group to make pushing and popping
2979     * attributes easy.  Also it's a good organization.
2980     */
2981    /*@{*/
2982    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
2983    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
2984    struct gl_current_attrib     Current;        /**< Current attributes */
2985    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2986    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2987    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2988    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2989    struct gl_light_attrib       Light;          /**< Light attributes */
2990    struct gl_line_attrib        Line;           /**< Line attributes */
2991    struct gl_list_attrib        List;           /**< List attributes */
2992    struct gl_multisample_attrib Multisample;
2993    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2994    struct gl_point_attrib       Point;          /**< Point attributes */
2995    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2996    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2997    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2998    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2999    struct gl_texture_attrib     Texture;        /**< Texture attributes */
3000    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
3001    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
3002    /*@}*/
3003
3004    /** \name Client attribute stack */
3005    /*@{*/
3006    GLuint ClientAttribStackDepth;
3007    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
3008    /*@}*/
3009
3010    /** \name Client attribute groups */
3011    /*@{*/
3012    struct gl_array_attrib       Array;  /**< Vertex arrays */
3013    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
3014    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
3015    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
3016    /*@}*/
3017
3018    /** \name Other assorted state (not pushed/popped on attribute stack) */
3019    /*@{*/
3020    struct gl_pixelmaps          PixelMaps;
3021    struct gl_histogram_attrib   Histogram;
3022    struct gl_minmax_attrib      MinMax;
3023    struct gl_convolution_attrib Convolution1D;
3024    struct gl_convolution_attrib Convolution2D;
3025    struct gl_convolution_attrib Separable2D;
3026
3027    struct gl_evaluators EvalMap;   /**< All evaluators */
3028    struct gl_feedback   Feedback;  /**< Feedback */
3029    struct gl_selection  Select;    /**< Selection */
3030
3031    struct gl_color_table ColorTable[COLORTABLE_MAX];
3032    struct gl_color_table ProxyColorTable[COLORTABLE_MAX];
3033 #if 0
3034    struct gl_color_table PostConvolutionColorTable;
3035    struct gl_color_table ProxyPostConvolutionColorTable;
3036    struct gl_color_table PostColorMatrixColorTable;
3037    struct gl_color_table ProxyPostColorMatrixColorTable;
3038 #endif
3039
3040    struct gl_program_state Program;        /**< for vertex or fragment progs */
3041    struct gl_vertex_program_state VertexProgram;   /**< GL_ARB/NV_vertex_program */
3042    struct gl_fragment_program_state FragmentProgram;  /**< GL_ARB/NV_vertex_program */
3043    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
3044
3045    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
3046
3047    struct gl_shader_state Shader; /**< GLSL shader object state */
3048    /*@}*/
3049
3050 #if FEATURE_EXT_framebuffer_object
3051    struct gl_renderbuffer *CurrentRenderbuffer;
3052 #endif
3053
3054    GLenum ErrorValue;        /**< Last error code */
3055    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
3056    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
3057
3058    /** \name Derived state */
3059    /*@{*/
3060    GLbitfield _TriangleCaps;      /**< bitwise-or of DD_* flags */
3061    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
3062    GLfloat _EyeZDir[3];
3063    GLfloat _ModelViewInvScale;
3064    GLboolean _NeedEyeCoords;
3065    GLboolean _ForceEyeCoords;
3066    GLenum _CurrentProgram;    /* currently executing program */
3067
3068    GLuint TextureStateTimestamp; /* detect changes to shared state */
3069
3070    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
3071    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
3072    /**@}*/
3073
3074    struct gl_list_extensions ListExt; /**< driver dlist extensions */
3075
3076
3077    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
3078                     *
3079                     * We don't have a better way to communicate this value from
3080                     * swrast_setup to swrast. */
3081
3082    /** \name For debugging/development only */
3083    /*@{*/
3084    GLboolean FirstTimeCurrent;
3085    /*@}*/
3086
3087    /** Dither disable via MESA_NO_DITHER env var */
3088    GLboolean NoDither;
3089
3090    /** software compression/decompression supported or not */
3091    GLboolean Mesa_DXTn;
3092
3093    /** Core tnl module support */
3094    struct gl_tnl_module TnlModule;
3095
3096    /**
3097     * \name Hooks for module contexts.
3098     *
3099     * These will eventually live in the driver or elsewhere.
3100     */
3101    /*@{*/
3102    void *swrast_context;
3103    void *swsetup_context;
3104    void *swtnl_context;
3105    void *swtnl_im;
3106    struct st_context *st;
3107    void *aelt_context;
3108    /*@}*/
3109 };
3110
3111
3112 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
3113 extern const char *_mesa_prim_name[GL_POLYGON+4];
3114
3115
3116 #ifdef DEBUG
3117 extern int MESA_VERBOSE;
3118 extern int MESA_DEBUG_FLAGS;
3119 # define MESA_FUNCTION __FUNCTION__
3120 #else
3121 # define MESA_VERBOSE 0
3122 # define MESA_DEBUG_FLAGS 0
3123 # define MESA_FUNCTION "a function"
3124 # ifndef NDEBUG
3125 #  define NDEBUG
3126 # endif
3127 #endif
3128
3129
3130 enum _verbose
3131 {
3132    VERBOSE_VARRAY               = 0x0001,
3133    VERBOSE_TEXTURE              = 0x0002,
3134    VERBOSE_IMMEDIATE            = 0x0004,
3135    VERBOSE_PIPELINE             = 0x0008,
3136    VERBOSE_DRIVER               = 0x0010,
3137    VERBOSE_STATE                = 0x0020,
3138    VERBOSE_API                  = 0x0040,
3139    VERBOSE_DISPLAY_LIST         = 0x0100,
3140    VERBOSE_LIGHTING             = 0x0200,
3141    VERBOSE_PRIMS                = 0x0400,
3142    VERBOSE_VERTS                = 0x0800,
3143    VERBOSE_DISASSEM             = 0x1000
3144 };
3145
3146
3147 enum _debug
3148 {
3149    DEBUG_ALWAYS_FLUSH           = 0x1
3150 };
3151
3152
3153
3154 #define Elements(x) sizeof(x)/sizeof(*(x))
3155
3156
3157 #endif /* TYPES_H */