src/mesa/main/mtypes.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.5
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /**
  27  * \file mtypes.h
  28  * Main Mesa data structures.
  29  *
  30  * Please try to mark derived values with a leading underscore ('_').
  31  */
  32
  33 #ifndef MTYPES_H
  34 #define MTYPES_H
  35
  36
  37 #include "main/glheader.h"
  38 #include "main/config.h"
  39 #include "main/compiler.h"
  40 #include "main/mfeatures.h"
  41 #include "glapi/glapi.h"
  42 #include "math/m_matrix.h"      /* GLmatrix */
  43
  44
  45 /**
  46  * Color channel data type.
  47  */
  48 #if CHAN_BITS == 8
  49    typedef GLubyte GLchan;
  50 #define CHAN_MAX 255
  51 #define CHAN_MAXF 255.0F
  52 #define CHAN_TYPE GL_UNSIGNED_BYTE
  53 #elif CHAN_BITS == 16
  54    typedef GLushort GLchan;
  55 #define CHAN_MAX 65535
  56 #define CHAN_MAXF 65535.0F
  57 #define CHAN_TYPE GL_UNSIGNED_SHORT
  58 #elif CHAN_BITS == 32
  59    typedef GLfloat GLchan;
  60 #define CHAN_MAX 1.0
  61 #define CHAN_MAXF 1.0F
  62 #define CHAN_TYPE GL_FLOAT
  63 #else
  64 #error "illegal number of color channel bits"
  65 #endif
  66
  67
  68 /**
  69  * Stencil buffer data type.
  70  */
  71 #if STENCIL_BITS==8
  72    typedef GLubyte GLstencil;
  73 #elif STENCIL_BITS==16
  74    typedef GLushort GLstencil;
  75 #else
  76 #  error "illegal number of stencil bits"
  77 #endif
  78
  79
  80 /**
  81  * \name Some forward type declarations
  82  */
  83 /*@{*/
  84 struct _mesa_HashTable;
  85 struct gl_attrib_node;
  86 struct gl_pixelstore_attrib;
  87 struct gl_program_cache;
  88 struct gl_texture_format;
  89 struct gl_texture_image;
  90 struct gl_texture_object;
  91 struct st_context;
  92 typedef struct __GLcontextRec GLcontext;
  93 typedef struct __GLcontextModesRec GLvisual;
  94 typedef struct gl_framebuffer GLframebuffer;
  95 /*@}*/
  96
  97
  98
  99 /**
 100  * Indexes for vertex program attributes.
 101  * GL_NV_vertex_program aliases generic attributes over the conventional
 102  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 103  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 104  * generic attributes are distinct/separate).
 105  */
 106 typedef enum
 107 {
 108    VERT_ATTRIB_POS = 0,
 109    VERT_ATTRIB_WEIGHT = 1,
 110    VERT_ATTRIB_NORMAL = 2,
 111    VERT_ATTRIB_COLOR0 = 3,
 112    VERT_ATTRIB_COLOR1 = 4,
 113    VERT_ATTRIB_FOG = 5,
 114    VERT_ATTRIB_COLOR_INDEX = 6,
 115    VERT_ATTRIB_POINT_SIZE = 6,  /*alias*/
 116    VERT_ATTRIB_EDGEFLAG = 7,
 117    VERT_ATTRIB_TEX0 = 8,
 118    VERT_ATTRIB_TEX1 = 9,
 119    VERT_ATTRIB_TEX2 = 10,
 120    VERT_ATTRIB_TEX3 = 11,
 121    VERT_ATTRIB_TEX4 = 12,
 122    VERT_ATTRIB_TEX5 = 13,
 123    VERT_ATTRIB_TEX6 = 14,
 124    VERT_ATTRIB_TEX7 = 15,
 125    VERT_ATTRIB_GENERIC0 = 16,
 126    VERT_ATTRIB_GENERIC1 = 17,
 127    VERT_ATTRIB_GENERIC2 = 18,
 128    VERT_ATTRIB_GENERIC3 = 19,
 129    VERT_ATTRIB_GENERIC4 = 20,
 130    VERT_ATTRIB_GENERIC5 = 21,
 131    VERT_ATTRIB_GENERIC6 = 22,
 132    VERT_ATTRIB_GENERIC7 = 23,
 133    VERT_ATTRIB_GENERIC8 = 24,
 134    VERT_ATTRIB_GENERIC9 = 25,
 135    VERT_ATTRIB_GENERIC10 = 26,
 136    VERT_ATTRIB_GENERIC11 = 27,
 137    VERT_ATTRIB_GENERIC12 = 28,
 138    VERT_ATTRIB_GENERIC13 = 29,
 139    VERT_ATTRIB_GENERIC14 = 30,
 140    VERT_ATTRIB_GENERIC15 = 31,
 141    VERT_ATTRIB_MAX = 32
 142 } gl_vert_attrib;
 143
 144 /**
 145  * Bitflags for vertex attributes.
 146  * These are used in bitfields in many places.
 147  */
 148 /*@{*/
 149 #define VERT_BIT_POS         (1 << VERT_ATTRIB_POS)
 150 #define VERT_BIT_WEIGHT      (1 << VERT_ATTRIB_WEIGHT)
 151 #define VERT_BIT_NORMAL      (1 << VERT_ATTRIB_NORMAL)
 152 #define VERT_BIT_COLOR0      (1 << VERT_ATTRIB_COLOR0)
 153 #define VERT_BIT_COLOR1      (1 << VERT_ATTRIB_COLOR1)
 154 #define VERT_BIT_FOG         (1 << VERT_ATTRIB_FOG)
 155 #define VERT_BIT_COLOR_INDEX (1 << VERT_ATTRIB_COLOR_INDEX)
 156 #define VERT_BIT_EDGEFLAG    (1 << VERT_ATTRIB_EDGEFLAG)
 157 #define VERT_BIT_TEX0        (1 << VERT_ATTRIB_TEX0)
 158 #define VERT_BIT_TEX1        (1 << VERT_ATTRIB_TEX1)
 159 #define VERT_BIT_TEX2        (1 << VERT_ATTRIB_TEX2)
 160 #define VERT_BIT_TEX3        (1 << VERT_ATTRIB_TEX3)
 161 #define VERT_BIT_TEX4        (1 << VERT_ATTRIB_TEX4)
 162 #define VERT_BIT_TEX5        (1 << VERT_ATTRIB_TEX5)
 163 #define VERT_BIT_TEX6        (1 << VERT_ATTRIB_TEX6)
 164 #define VERT_BIT_TEX7        (1 << VERT_ATTRIB_TEX7)
 165 #define VERT_BIT_GENERIC0    (1 << VERT_ATTRIB_GENERIC0)
 166 #define VERT_BIT_GENERIC1    (1 << VERT_ATTRIB_GENERIC1)
 167 #define VERT_BIT_GENERIC2    (1 << VERT_ATTRIB_GENERIC2)
 168 #define VERT_BIT_GENERIC3    (1 << VERT_ATTRIB_GENERIC3)
 169 #define VERT_BIT_GENERIC4    (1 << VERT_ATTRIB_GENERIC4)
 170 #define VERT_BIT_GENERIC5    (1 << VERT_ATTRIB_GENERIC5)
 171 #define VERT_BIT_GENERIC6    (1 << VERT_ATTRIB_GENERIC6)
 172 #define VERT_BIT_GENERIC7    (1 << VERT_ATTRIB_GENERIC7)
 173 #define VERT_BIT_GENERIC8    (1 << VERT_ATTRIB_GENERIC8)
 174 #define VERT_BIT_GENERIC9    (1 << VERT_ATTRIB_GENERIC9)
 175 #define VERT_BIT_GENERIC10   (1 << VERT_ATTRIB_GENERIC10)
 176 #define VERT_BIT_GENERIC11   (1 << VERT_ATTRIB_GENERIC11)
 177 #define VERT_BIT_GENERIC12   (1 << VERT_ATTRIB_GENERIC12)
 178 #define VERT_BIT_GENERIC13   (1 << VERT_ATTRIB_GENERIC13)
 179 #define VERT_BIT_GENERIC14   (1 << VERT_ATTRIB_GENERIC14)
 180 #define VERT_BIT_GENERIC15   (1 << VERT_ATTRIB_GENERIC15)
 181
 182 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 183 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 184 /*@}*/
 185
 186
 187 /**
 188  * Indexes for vertex program result attributes
 189  */
 190 typedef enum
 191 {
 192    VERT_RESULT_HPOS = 0,
 193    VERT_RESULT_COL0 = 1,
 194    VERT_RESULT_COL1 = 2,
 195    VERT_RESULT_FOGC = 3,
 196    VERT_RESULT_TEX0 = 4,
 197    VERT_RESULT_TEX1 = 5,
 198    VERT_RESULT_TEX2 = 6,
 199    VERT_RESULT_TEX3 = 7,
 200    VERT_RESULT_TEX4 = 8,
 201    VERT_RESULT_TEX5 = 9,
 202    VERT_RESULT_TEX6 = 10,
 203    VERT_RESULT_TEX7 = 11,
 204    VERT_RESULT_PSIZ = 12,
 205    VERT_RESULT_BFC0 = 13,
 206    VERT_RESULT_BFC1 = 14,
 207    VERT_RESULT_EDGE = 15,
 208    VERT_RESULT_VAR0 = 16  /**< shader varying */,
 209    VERT_RESULT_MAX = (VERT_RESULT_VAR0 + MAX_VARYING)
 210 } gl_vert_result;
 211
 212
 213 /**
 214  * Indexes for fragment program input attributes.
 215  */
 216 typedef enum
 217 {
 218    FRAG_ATTRIB_WPOS = 0,
 219    FRAG_ATTRIB_COL0 = 1,
 220    FRAG_ATTRIB_COL1 = 2,
 221    FRAG_ATTRIB_FOGC = 3,
 222    FRAG_ATTRIB_TEX0 = 4,
 223    FRAG_ATTRIB_TEX1 = 5,
 224    FRAG_ATTRIB_TEX2 = 6,
 225    FRAG_ATTRIB_TEX3 = 7,
 226    FRAG_ATTRIB_TEX4 = 8,
 227    FRAG_ATTRIB_TEX5 = 9,
 228    FRAG_ATTRIB_TEX6 = 10,
 229    FRAG_ATTRIB_TEX7 = 11,
 230    FRAG_ATTRIB_VAR0 = 12,  /**< shader varying */
 231    FRAG_ATTRIB_MAX = (FRAG_ATTRIB_VAR0 + MAX_VARYING)
 232 } gl_frag_attrib;
 233
 234 /**
 235  * Bitflags for fragment program input attributes.
 236  */
 237 /*@{*/
 238 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 239 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 240 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 241 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 242 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 243 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 244 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 245 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 246 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 247 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 248 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 249 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 250 #define FRAG_BIT_VAR0  (1 << FRAG_ATTRIB_VAR0)
 251
 252 #define FRAG_BIT_TEX(U)  (FRAG_BIT_TEX0 << (U))
 253 #define FRAG_BIT_VAR(V)  (FRAG_BIT_VAR0 << (V))
 254
 255 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 256                            FRAG_BIT_TEX1|       \
 257                            FRAG_BIT_TEX2|       \
 258                            FRAG_BIT_TEX3|       \
 259                            FRAG_BIT_TEX4|       \
 260                            FRAG_BIT_TEX5|       \
 261                            FRAG_BIT_TEX6|       \
 262                            FRAG_BIT_TEX7)
 263 /*@}*/
 264
 265
 266 /**
 267  * Fragment program results
 268  */
 269 typedef enum
 270 {
 271    FRAG_RESULT_DEPTH = 0,
 272    FRAG_RESULT_COLOR = 1,
 273    FRAG_RESULT_DATA0 = 2,
 274    FRAG_RESULT_MAX = (FRAG_RESULT_DATA0 + MAX_DRAW_BUFFERS)
 275 } gl_frag_result;
 276
 277
 278 /**
 279  * Indexes for all renderbuffers
 280  */
 281 typedef enum
 282 {
 283    /* the four standard color buffers */
 284    BUFFER_FRONT_LEFT,
 285    BUFFER_BACK_LEFT,
 286    BUFFER_FRONT_RIGHT,
 287    BUFFER_BACK_RIGHT,
 288    BUFFER_DEPTH,
 289    BUFFER_STENCIL,
 290    BUFFER_ACCUM,
 291    /* optional aux buffer */
 292    BUFFER_AUX0,
 293    /* generic renderbuffers */
 294    BUFFER_COLOR0,
 295    BUFFER_COLOR1,
 296    BUFFER_COLOR2,
 297    BUFFER_COLOR3,
 298    BUFFER_COLOR4,
 299    BUFFER_COLOR5,
 300    BUFFER_COLOR6,
 301    BUFFER_COLOR7,
 302    BUFFER_COUNT
 303 } gl_buffer_index;
 304
 305 /**
 306  * Bit flags for all renderbuffers
 307  */
 308 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 309 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 310 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 311 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 312 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 313 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 314 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 315 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 316 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 317 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 318 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 319 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 320 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 321 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 322 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 323 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 324 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 325 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 326 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 327
 328 /**
 329  * Mask of all the color buffer bits (but not accum).
 330  */
 331 #define BUFFER_BITS_COLOR  (BUFFER_BIT_FRONT_LEFT | \
 332                             BUFFER_BIT_BACK_LEFT | \
 333                             BUFFER_BIT_FRONT_RIGHT | \
 334                             BUFFER_BIT_BACK_RIGHT | \
 335                             BUFFER_BIT_AUX0 | \
 336                             BUFFER_BIT_COLOR0 | \
 337                             BUFFER_BIT_COLOR1 | \
 338                             BUFFER_BIT_COLOR2 | \
 339                             BUFFER_BIT_COLOR3 | \
 340                             BUFFER_BIT_COLOR4 | \
 341                             BUFFER_BIT_COLOR5 | \
 342                             BUFFER_BIT_COLOR6 | \
 343                             BUFFER_BIT_COLOR7)
 344
 345
 346 /** The pixel transfer path has three color tables: */
 347 typedef enum
 348 {
 349    COLORTABLE_PRECONVOLUTION,
 350    COLORTABLE_POSTCONVOLUTION,
 351    COLORTABLE_POSTCOLORMATRIX,
 352    COLORTABLE_MAX
 353 } gl_colortable_index;
 354
 355
 356 /**
 357  * Data structure for color tables
 358  */
 359 struct gl_color_table
 360 {
 361    GLenum InternalFormat;      /**< The user-specified format */
 362    GLenum _BaseFormat;         /**< GL_ALPHA, GL_RGBA, GL_RGB, etc */
 363    GLuint Size;                /**< number of entries in table */
 364    GLfloat *TableF;            /**< Color table, floating point values */
 365    GLubyte *TableUB;           /**< Color table, ubyte values */
 366    GLubyte RedSize;
 367    GLubyte GreenSize;
 368    GLubyte BlueSize;
 369    GLubyte AlphaSize;
 370    GLubyte LuminanceSize;
 371    GLubyte IntensitySize;
 372 };
 373
 374
 375 /**
 376  * \name Bit flags used for updating material values.
 377  */
 378 /*@{*/
 379 #define MAT_ATTRIB_FRONT_AMBIENT           0
 380 #define MAT_ATTRIB_BACK_AMBIENT            1
 381 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 382 #define MAT_ATTRIB_BACK_DIFFUSE            3
 383 #define MAT_ATTRIB_FRONT_SPECULAR          4
 384 #define MAT_ATTRIB_BACK_SPECULAR           5
 385 #define MAT_ATTRIB_FRONT_EMISSION          6
 386 #define MAT_ATTRIB_BACK_EMISSION           7
 387 #define MAT_ATTRIB_FRONT_SHININESS         8
 388 #define MAT_ATTRIB_BACK_SHININESS          9
 389 #define MAT_ATTRIB_FRONT_INDEXES           10
 390 #define MAT_ATTRIB_BACK_INDEXES            11
 391 #define MAT_ATTRIB_MAX                     12
 392
 393 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 394 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 395 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 396 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 397 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 398 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 399
 400 #define MAT_INDEX_AMBIENT  0
 401 #define MAT_INDEX_DIFFUSE  1
 402 #define MAT_INDEX_SPECULAR 2
 403
 404 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 405 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 406 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 407 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 408 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 409 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 410 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 411 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 412 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 413 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 414 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 415 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 416
 417
 418 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 419                                  MAT_BIT_FRONT_AMBIENT |        \
 420                                  MAT_BIT_FRONT_DIFFUSE |        \
 421                                  MAT_BIT_FRONT_SPECULAR |       \
 422                                  MAT_BIT_FRONT_SHININESS |      \
 423                                  MAT_BIT_FRONT_INDEXES)
 424
 425 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 426                                  MAT_BIT_BACK_AMBIENT |         \
 427                                  MAT_BIT_BACK_DIFFUSE |         \
 428                                  MAT_BIT_BACK_SPECULAR |        \
 429                                  MAT_BIT_BACK_SHININESS |       \
 430                                  MAT_BIT_BACK_INDEXES)
 431
 432 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 433 /*@}*/
 434
 435
 436 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 437 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 438
 439 /**
 440  * Material shininess lookup table.
 441  */
 442 struct gl_shine_tab
 443 {
 444    struct gl_shine_tab *next, *prev;
 445    GLfloat tab[SHINE_TABLE_SIZE+1];
 446    GLfloat shininess;
 447    GLuint refcount;
 448 };
 449
 450
 451 /**
 452  * Light source state.
 453  */
 454 struct gl_light
 455 {
 456    struct gl_light *next;       /**< double linked list with sentinel */
 457    struct gl_light *prev;
 458
 459    GLfloat Ambient[4];          /**< ambient color */
 460    GLfloat Diffuse[4];          /**< diffuse color */
 461    GLfloat Specular[4];         /**< specular color */
 462    GLfloat EyePosition[4];      /**< position in eye coordinates */
 463    GLfloat SpotDirection[4];    /**< spotlight direction in eye coordinates */
 464    GLfloat SpotExponent;
 465    GLfloat SpotCutoff;          /**< in degrees */
 466    GLfloat _CosCutoffNeg;       /**< = cos(SpotCutoff) */
 467    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 468    GLfloat ConstantAttenuation;
 469    GLfloat LinearAttenuation;
 470    GLfloat QuadraticAttenuation;
 471    GLboolean Enabled;           /**< On/off flag */
 472
 473    /**
 474     * \name Derived fields
 475     */
 476    /*@{*/
 477    GLbitfield _Flags;           /**< State */
 478
 479    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 480    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 481    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 482    GLfloat _NormSpotDirection[4]; /**< normalized spotlight direction */
 483    GLfloat _VP_inf_spot_attenuation;
 484
 485    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 486    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 487    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 488    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 489    GLfloat _dli;                /**< CI diffuse light intensity */
 490    GLfloat _sli;                /**< CI specular light intensity */
 491    /*@}*/
 492 };
 493
 494
 495 /**
 496  * Light model state.
 497  */
 498 struct gl_lightmodel
 499 {
 500    GLfloat Ambient[4];          /**< ambient color */
 501    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 502    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 503    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 504                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 505 };
 506
 507
 508 /**
 509  * Material state.
 510  */
 511 struct gl_material
 512 {
 513    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 514 };
 515
 516
 517 /**
 518  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 519  */
 520 struct gl_accum_attrib
 521 {
 522    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 523 };
 524
 525
 526 /**
 527  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 528  */
 529 struct gl_colorbuffer_attrib
 530 {
 531    GLuint ClearIndex;                   /**< Index to use for glClear */
 532    GLclampf ClearColor[4];              /**< Color to use for glClear */
 533
 534    GLuint IndexMask;                    /**< Color index write mask */
 535    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 536
 537    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 538
 539    /**
 540     * \name alpha testing
 541     */
 542    /*@{*/
 543    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 544    GLenum AlphaFunc;                    /**< Alpha test function */
 545    GLclampf AlphaRef;                   /**< Alpha reference value */
 546    /*@}*/
 547
 548    /**
 549     * \name Blending
 550     */
 551    /*@{*/
 552    GLboolean BlendEnabled;              /**< Blending enabled flag */
 553    GLenum BlendSrcRGB;                  /**< Blending source operator */
 554    GLenum BlendDstRGB;                  /**< Blending destination operator */
 555    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 556    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 557    GLenum BlendEquationRGB;             /**< Blending equation */
 558    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 559    GLfloat BlendColor[4];               /**< Blending color */
 560    /*@}*/
 561
 562    /**
 563     * \name Logic op
 564     */
 565    /*@{*/
 566    GLenum LogicOp;                      /**< Logic operator */
 567    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 568    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 569    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 570    /*@}*/
 571
 572    GLboolean DitherFlag;                /**< Dither enable flag */
 573
 574    GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 575    GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 576 };
 577
 578
 579 /**
 580  * Current attribute group (GL_CURRENT_BIT).
 581  */
 582 struct gl_current_attrib
 583 {
 584    /**
 585     * \name Current vertex attributes.
 586     * \note Values are valid only after FLUSH_VERTICES has been called.
 587     * \note Index and Edgeflag current values are stored as floats in the
 588     * SIX and SEVEN attribute slots.
 589     */
 590    GLfloat Attrib[VERT_ATTRIB_MAX][4];  /**< Position, color, texcoords, etc */
 591
 592    /**
 593     * \name Current raster position attributes (always valid).
 594     * \note This set of attributes is very similar to the SWvertex struct.
 595     */
 596    /*@{*/
 597    GLfloat RasterPos[4];
 598    GLfloat RasterDistance;
 599    GLfloat RasterColor[4];
 600    GLfloat RasterSecondaryColor[4];
 601    GLfloat RasterIndex;
 602    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];
 603    GLboolean RasterPosValid;
 604    /*@}*/
 605 };
 606
 607
 608 /**
 609  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 610  */
 611 struct gl_depthbuffer_attrib
 612 {
 613    GLenum Func;                 /**< Function for depth buffer compare */
 614    GLclampd Clear;              /**< Value to clear depth buffer to */
 615    GLboolean Test;              /**< Depth buffering enabled flag */
 616    GLboolean Mask;              /**< Depth buffer writable? */
 617    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 618    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 619 };
 620
 621
 622 /**
 623  * Evaluator attribute group (GL_EVAL_BIT).
 624  */
 625 struct gl_eval_attrib
 626 {
 627    /**
 628     * \name Enable bits
 629     */
 630    /*@{*/
 631    GLboolean Map1Color4;
 632    GLboolean Map1Index;
 633    GLboolean Map1Normal;
 634    GLboolean Map1TextureCoord1;
 635    GLboolean Map1TextureCoord2;
 636    GLboolean Map1TextureCoord3;
 637    GLboolean Map1TextureCoord4;
 638    GLboolean Map1Vertex3;
 639    GLboolean Map1Vertex4;
 640    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 641    GLboolean Map2Color4;
 642    GLboolean Map2Index;
 643    GLboolean Map2Normal;
 644    GLboolean Map2TextureCoord1;
 645    GLboolean Map2TextureCoord2;
 646    GLboolean Map2TextureCoord3;
 647    GLboolean Map2TextureCoord4;
 648    GLboolean Map2Vertex3;
 649    GLboolean Map2Vertex4;
 650    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 651    GLboolean AutoNormal;
 652    /*@}*/
 653
 654    /**
 655     * \name Map Grid endpoints and divisions and calculated du values
 656     */
 657    /*@{*/
 658    GLint MapGrid1un;
 659    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 660    GLint MapGrid2un, MapGrid2vn;
 661    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 662    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 663    /*@}*/
 664 };
 665
 666
 667 /**
 668  * Fog attribute group (GL_FOG_BIT).
 669  */
 670 struct gl_fog_attrib
 671 {
 672    GLboolean Enabled;           /**< Fog enabled flag */
 673    GLfloat Color[4];            /**< Fog color */
 674    GLfloat Density;             /**< Density >= 0.0 */
 675    GLfloat Start;               /**< Start distance in eye coords */
 676    GLfloat End;                 /**< End distance in eye coords */
 677    GLfloat Index;               /**< Fog index */
 678    GLenum Mode;                 /**< Fog mode */
 679    GLboolean ColorSumEnabled;
 680    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 681    GLfloat _Scale;              /**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
 682 };
 683
 684
 685 /**
 686  * Hint attribute group (GL_HINT_BIT).
 687  *
 688  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 689  */
 690 struct gl_hint_attrib
 691 {
 692    GLenum PerspectiveCorrection;
 693    GLenum PointSmooth;
 694    GLenum LineSmooth;
 695    GLenum PolygonSmooth;
 696    GLenum Fog;
 697    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 698    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 699    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 700    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 701 };
 702
 703
 704 /**
 705  * Histogram attributes.
 706  */
 707 struct gl_histogram_attrib
 708 {
 709    GLuint Width;                            /**< number of table entries */
 710    GLint Format;                            /**< GL_ALPHA, GL_RGB, etc */
 711    GLuint Count[HISTOGRAM_TABLE_SIZE][4];   /**< the histogram */
 712    GLboolean Sink;                          /**< terminate image transfer? */
 713    GLubyte RedSize;                         /**< Bits per counter */
 714    GLubyte GreenSize;
 715    GLubyte BlueSize;
 716    GLubyte AlphaSize;
 717    GLubyte LuminanceSize;
 718 };
 719
 720
 721 /**
 722  * Color Min/max state.
 723  */
 724 struct gl_minmax_attrib
 725 {
 726    GLenum Format;
 727    GLboolean Sink;
 728    GLfloat Min[4], Max[4];   /**< RGBA */
 729 };
 730
 731
 732 /**
 733  * Image convolution state.
 734  */
 735 struct gl_convolution_attrib
 736 {
 737    GLenum Format;
 738    GLenum InternalFormat;
 739    GLuint Width;
 740    GLuint Height;
 741    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 742 };
 743
 744
 745 /**
 746  * Light state flags.
 747  */
 748 /*@{*/
 749 #define LIGHT_SPOT         0x1
 750 #define LIGHT_LOCAL_VIEWER 0x2
 751 #define LIGHT_POSITIONAL   0x4
 752 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 753 /*@}*/
 754
 755
 756 /**
 757  * Lighting attribute group (GL_LIGHT_BIT).
 758  */
 759 struct gl_light_attrib
 760 {
 761    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 762    struct gl_lightmodel Model;          /**< Lighting model */
 763
 764    /**
 765     * Must flush FLUSH_VERTICES before referencing:
 766     */
 767    /*@{*/
 768    struct gl_material Material;         /**< Includes front & back values */
 769    /*@}*/
 770
 771    GLboolean Enabled;                   /**< Lighting enabled flag */
 772    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 773    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 774    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 775    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 776    GLboolean ColorMaterialEnabled;
 777    GLenum ClampVertexColor;
 778
 779    struct gl_light EnabledList;         /**< List sentinel */
 780
 781    /**
 782     * Derived state for optimizations:
 783     */
 784    /*@{*/
 785    GLboolean _NeedEyeCoords;
 786    GLboolean _NeedVertices;             /**< Use fast shader? */
 787    GLbitfield _Flags;                   /**< LIGHT_* flags, see above */
 788    GLfloat _BaseColor[2][3];
 789    /*@}*/
 790 };
 791
 792
 793 /**
 794  * Line attribute group (GL_LINE_BIT).
 795  */
 796 struct gl_line_attrib
 797 {
 798    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 799    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 800    GLushort StipplePattern;     /**< Stipple pattern */
 801    GLint StippleFactor;         /**< Stipple repeat factor */
 802    GLfloat Width;               /**< Line width */
 803 };
 804
 805
 806 /**
 807  * Display list attribute group (GL_LIST_BIT).
 808  */
 809 struct gl_list_attrib
 810 {
 811    GLuint ListBase;
 812 };
 813
 814
 815 /**
 816  * Used by device drivers to hook new commands into display lists.
 817  */
 818 struct gl_list_instruction
 819 {
 820    GLuint Size;
 821    void (*Execute)( GLcontext *ctx, void *data );
 822    void (*Destroy)( GLcontext *ctx, void *data );
 823    void (*Print)( GLcontext *ctx, void *data );
 824 };
 825
 826 #define MAX_DLIST_EXT_OPCODES 16
 827
 828 /**
 829  * Used by device drivers to hook new commands into display lists.
 830  */
 831 struct gl_list_extensions
 832 {
 833    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 834    GLuint NumOpcodes;
 835 };
 836
 837
 838 /**
 839  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 840  */
 841 struct gl_multisample_attrib
 842 {
 843    GLboolean Enabled;
 844    GLboolean _Enabled;   /**< true if Enabled and multisample buffer */
 845    GLboolean SampleAlphaToCoverage;
 846    GLboolean SampleAlphaToOne;
 847    GLboolean SampleCoverage;
 848    GLfloat SampleCoverageValue;
 849    GLboolean SampleCoverageInvert;
 850 };
 851
 852
 853 /**
 854  * A pixelmap (see glPixelMap)
 855  */
 856 struct gl_pixelmap
 857 {
 858    GLint Size;
 859    GLfloat Map[MAX_PIXEL_MAP_TABLE];
 860    GLubyte Map8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 861 };
 862
 863
 864 /**
 865  * Collection of all pixelmaps
 866  */
 867 struct gl_pixelmaps
 868 {
 869    struct gl_pixelmap RtoR;  /**< i.e. GL_PIXEL_MAP_R_TO_R */
 870    struct gl_pixelmap GtoG;
 871    struct gl_pixelmap BtoB;
 872    struct gl_pixelmap AtoA;
 873    struct gl_pixelmap ItoR;
 874    struct gl_pixelmap ItoG;
 875    struct gl_pixelmap ItoB;
 876    struct gl_pixelmap ItoA;
 877    struct gl_pixelmap ItoI;
 878    struct gl_pixelmap StoS;
 879 };
 880
 881
 882 /**
 883  * Pixel attribute group (GL_PIXEL_MODE_BIT).
 884  */
 885 struct gl_pixel_attrib
 886 {
 887    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
 888
 889    /*--- Begin Pixel Transfer State ---*/
 890    /* Fields are in the order in which they're applied... */
 891
 892    /** Scale & Bias (index shift, offset) */
 893    /*@{*/
 894    GLfloat RedBias, RedScale;
 895    GLfloat GreenBias, GreenScale;
 896    GLfloat BlueBias, BlueScale;
 897    GLfloat AlphaBias, AlphaScale;
 898    GLfloat DepthBias, DepthScale;
 899    GLint IndexShift, IndexOffset;
 900    /*@}*/
 901
 902    /* Pixel Maps */
 903    /* Note: actual pixel maps are not part of this attrib group */
 904    GLboolean MapColorFlag;
 905    GLboolean MapStencilFlag;
 906
 907    /* There are multiple color table stages: */
 908    GLboolean ColorTableEnabled[COLORTABLE_MAX];
 909    GLfloat ColorTableScale[COLORTABLE_MAX][4];  /**< RGBA */
 910    GLfloat ColorTableBias[COLORTABLE_MAX][4];   /**< RGBA */
 911
 912    /* Convolution (GL_EXT_convolution) */
 913    GLboolean Convolution1DEnabled;
 914    GLboolean Convolution2DEnabled;
 915    GLboolean Separable2DEnabled;
 916    GLfloat ConvolutionBorderColor[3][4];  /**< RGBA */
 917    GLenum ConvolutionBorderMode[3];
 918    GLfloat ConvolutionFilterScale[3][4];  /**< RGBA */
 919    GLfloat ConvolutionFilterBias[3][4];   /**< RGBA */
 920    GLfloat PostConvolutionScale[4];  /**< RGBA */
 921    GLfloat PostConvolutionBias[4];   /**< RGBA */
 922
 923    /* Color matrix (GL_SGI_color_matrix) */
 924    /* Note: the color matrix is not part of this attrib group */
 925    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 926    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 927
 928    /* Histogram & minmax (GL_EXT_histogram) */
 929    /* Note: histogram and minmax data are not part of this attrib group */
 930    GLboolean HistogramEnabled;
 931    GLboolean MinMaxEnabled;
 932
 933    /*--- End Pixel Transfer State ---*/
 934
 935    /** glPixelZoom */
 936    GLfloat ZoomX, ZoomY;
 937
 938    /** GL_SGI_texture_color_table */
 939    GLfloat TextureColorTableScale[4]; /**< RGBA */
 940    GLfloat TextureColorTableBias[4];  /**< RGBA */
 941 };
 942
 943
 944 /**
 945  * Point attribute group (GL_POINT_BIT).
 946  */
 947 struct gl_point_attrib
 948 {
 949    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 950    GLfloat Size;                /**< User-specified point size */
 951    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 952    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 953    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 954    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 955    GLboolean PointSprite;       /**< GL_NV/ARB_point_sprite */
 956    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_ARB_point_sprite */
 957    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 958    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
 959 };
 960
 961
 962 /**
 963  * Polygon attribute group (GL_POLYGON_BIT).
 964  */
 965 struct gl_polygon_attrib
 966 {
 967    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
 968    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
 969    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
 970    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
 971    GLboolean CullFlag;          /**< Culling on/off flag */
 972    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
 973    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
 974    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
 975    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
 976    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
 977    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
 978    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
 979    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
 980 };
 981
 982
 983 /**
 984  * Scissor attributes (GL_SCISSOR_BIT).
 985  */
 986 struct gl_scissor_attrib
 987 {
 988    GLboolean Enabled;           /**< Scissor test enabled? */
 989    GLint X, Y;                  /**< Lower left corner of box */
 990    GLsizei Width, Height;       /**< Size of box */
 991 };
 992
 993
 994 /**
 995  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
 996  *
 997  * Three sets of stencil data are tracked so that OpenGL 2.0,
 998  * GL_EXT_stencil_two_side, and GL_ATI_separate_stencil can all be supported
 999  * simultaneously.  In each of the stencil state arrays, element 0 corresponds
1000  * to GL_FRONT.  Element 1 corresponds to the OpenGL 2.0 /
1001  * GL_ATI_separate_stencil GL_BACK state.  Element 2 corresponds to the
1002  * GL_EXT_stencil_two_side GL_BACK state.
1003  *
1004  * The derived value \c _BackFace is either 1 or 2 depending on whether or
1005  * not GL_STENCIL_TEST_TWO_SIDE_EXT is enabled.
1006  *
1007  * The derived value \c _TestTwoSide is set when the front-face and back-face
1008  * stencil state are different.
1009  */
1010 struct gl_stencil_attrib
1011 {
1012    GLboolean Enabled;           /**< Enabled flag */
1013    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1014    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 2) */
1015    GLboolean _Enabled;          /**< Enabled and stencil buffer present */
1016    GLboolean _TestTwoSide;
1017    GLubyte _BackFace;           /**< Current back stencil state (1 or 2) */
1018    GLenum Function[3];          /**< Stencil function */
1019    GLenum FailFunc[3];          /**< Fail function */
1020    GLenum ZPassFunc[3];         /**< Depth buffer pass function */
1021    GLenum ZFailFunc[3];         /**< Depth buffer fail function */
1022    GLint Ref[3];                /**< Reference value */
1023    GLuint ValueMask[3];         /**< Value mask */
1024    GLuint WriteMask[3];         /**< Write mask */
1025    GLuint Clear;                /**< Clear value */
1026 };
1027
1028
1029 /**
1030  * An index for each type of texture object.  These correspond to the GL
1031  * target target enums, such as GL_TEXTURE_2D, GL_TEXTURE_CUBE_MAP, etc.
1032  * Note: the order is from highest priority to lowest priority.
1033  */
1034 typedef enum
1035 {
1036    TEXTURE_2D_ARRAY_INDEX,
1037    TEXTURE_1D_ARRAY_INDEX,
1038    TEXTURE_CUBE_INDEX,
1039    TEXTURE_3D_INDEX,
1040    TEXTURE_RECT_INDEX,
1041    TEXTURE_2D_INDEX,
1042    TEXTURE_1D_INDEX,
1043    NUM_TEXTURE_TARGETS
1044 } gl_texture_index;
1045
1046
1047 /**
1048  * Bit flags for each type of texture object
1049  * Used for Texture.Unit[]._ReallyEnabled flags.
1050  */
1051 /*@{*/
1052 #define TEXTURE_2D_ARRAY_BIT (1 << TEXTURE_2D_ARRAY_INDEX)
1053 #define TEXTURE_1D_ARRAY_BIT (1 << TEXTURE_1D_ARRAY_INDEX)
1054 #define TEXTURE_CUBE_BIT     (1 << TEXTURE_CUBE_INDEX)
1055 #define TEXTURE_3D_BIT       (1 << TEXTURE_3D_INDEX)
1056 #define TEXTURE_RECT_BIT     (1 << TEXTURE_RECT_INDEX)
1057 #define TEXTURE_2D_BIT       (1 << TEXTURE_2D_INDEX)
1058 #define TEXTURE_1D_BIT       (1 << TEXTURE_1D_INDEX)
1059 /*@}*/
1060
1061
1062 /**
1063  * TexGenEnabled flags.
1064  */
1065 /*@{*/
1066 #define S_BIT 1
1067 #define T_BIT 2
1068 #define R_BIT 4
1069 #define Q_BIT 8
1070 /*@}*/
1071
1072
1073 /**
1074  * Bit flag versions of the corresponding GL_ constants.
1075  */
1076 /*@{*/
1077 #define TEXGEN_SPHERE_MAP        0x1
1078 #define TEXGEN_OBJ_LINEAR        0x2
1079 #define TEXGEN_EYE_LINEAR        0x4
1080 #define TEXGEN_REFLECTION_MAP_NV 0x8
1081 #define TEXGEN_NORMAL_MAP_NV     0x10
1082
1083 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1084                                   TEXGEN_REFLECTION_MAP_NV | \
1085                                   TEXGEN_NORMAL_MAP_NV)
1086 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1087                                   TEXGEN_REFLECTION_MAP_NV | \
1088                                   TEXGEN_NORMAL_MAP_NV     | \
1089                                   TEXGEN_EYE_LINEAR)
1090 /*@}*/
1091
1092
1093
1094 /** Tex-gen enabled for texture unit? */
1095 #define ENABLE_TEXGEN(unit) (1 << (unit))
1096
1097 /** Non-identity texture matrix for texture unit? */
1098 #define ENABLE_TEXMAT(unit) (1 << (unit))
1099
1100
1101 /**
1102  * Texel fetch function prototype.  We use texel fetch functions to
1103  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1104  * texture images.  These functions help to isolate us from the gritty
1105  * details of all the various texture image encodings.
1106  *
1107  * \param texImage texture image.
1108  * \param col texel column.
1109  * \param row texel row.
1110  * \param img texel image level/layer.
1111  * \param texelOut output texel (up to 4 GLchans)
1112  */
1113 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1114                                  GLint col, GLint row, GLint img,
1115                                  GLchan *texelOut );
1116
1117 /**
1118  * As above, but returns floats.
1119  * Used for depth component images and for upcoming signed/float
1120  * texture images.
1121  */
1122 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1123                                  GLint col, GLint row, GLint img,
1124                                  GLfloat *texelOut );
1125
1126
1127 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1128                                GLint col, GLint row, GLint img,
1129                                const void *texel);
1130
1131
1132 /**
1133  * This macro defines the (many) parameters to the texstore functions.
1134  * \param dims  either 1 or 2 or 3
1135  * \param baseInternalFormat  user-specified base internal format
1136  * \param dstFormat  destination Mesa texture format
1137  * \param dstAddr  destination image address
1138  * \param dstX/Y/Zoffset  destination x/y/z offset (ala TexSubImage), in texels
1139  * \param dstRowStride  destination image row stride, in bytes
1140  * \param dstImageOffsets  offset of each 2D slice within 3D texture, in texels
1141  * \param srcWidth/Height/Depth  source image size, in pixels
1142  * \param srcFormat  incoming image format
1143  * \param srcType  incoming image data type
1144  * \param srcAddr  source image address
1145  * \param srcPacking  source image packing parameters
1146  */
1147 #define TEXSTORE_PARAMS \
1148         GLcontext *ctx, GLuint dims, \
1149         GLenum baseInternalFormat, \
1150         const struct gl_texture_format *dstFormat, \
1151         GLvoid *dstAddr, \
1152         GLint dstXoffset, GLint dstYoffset, GLint dstZoffset, \
1153         GLint dstRowStride, const GLuint *dstImageOffsets, \
1154         GLint srcWidth, GLint srcHeight, GLint srcDepth, \
1155         GLenum srcFormat, GLenum srcType, \
1156         const GLvoid *srcAddr, \
1157         const struct gl_pixelstore_attrib *srcPacking
1158
1159
1160
1161 /**
1162  * Texture image storage function.
1163  */
1164 typedef GLboolean (*StoreTexImageFunc)(TEXSTORE_PARAMS);
1165
1166
1167 /**
1168  * Texture format record
1169  */
1170 struct gl_texture_format
1171 {
1172    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1173
1174    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1175                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1176                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1177                                  *   GL_DEPTH_COMPONENT.
1178                                  */
1179    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1180
1181    /**
1182     * Bits per texel component.  These are just rough approximations
1183     * for compressed texture formats.
1184     */
1185    /*@{*/
1186    GLubyte RedBits;
1187    GLubyte GreenBits;
1188    GLubyte BlueBits;
1189    GLubyte AlphaBits;
1190    GLubyte LuminanceBits;
1191    GLubyte IntensityBits;
1192    GLubyte IndexBits;
1193    GLubyte DepthBits;
1194    GLubyte StencilBits;         /**< GL_EXT_packed_depth_stencil */
1195    /*@}*/
1196
1197    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1198
1199    StoreTexImageFunc StoreImage;
1200
1201    /**
1202     * \name Texel fetch function pointers
1203     */
1204    /*@{*/
1205    FetchTexelFuncC FetchTexel1D;
1206    FetchTexelFuncC FetchTexel2D;
1207    FetchTexelFuncC FetchTexel3D;
1208    FetchTexelFuncF FetchTexel1Df;
1209    FetchTexelFuncF FetchTexel2Df;
1210    FetchTexelFuncF FetchTexel3Df;
1211    /*@}*/
1212
1213    StoreTexelFunc StoreTexel;
1214 };
1215
1216
1217 /**
1218  * Texture image state.  Describes the dimensions of a texture image,
1219  * the texel format and pointers to Texel Fetch functions.
1220  */
1221 struct gl_texture_image
1222 {
1223    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1224                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1225                                  *   GL_INTENSITY, GL_COLOR_INDEX,
1226                                  *   GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT
1227                                  *   only. Used for choosing TexEnv arithmetic.
1228                                  */
1229    GLint InternalFormat;        /**< Internal format as given by the user */
1230    GLuint Border;               /**< 0 or 1 */
1231    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1232    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1233    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1234    GLuint Width2;               /**< = Width - 2*Border */
1235    GLuint Height2;              /**< = Height - 2*Border */
1236    GLuint Depth2;               /**< = Depth - 2*Border */
1237    GLuint WidthLog2;            /**< = log2(Width2) */
1238    GLuint HeightLog2;           /**< = log2(Height2) */
1239    GLuint DepthLog2;            /**< = log2(Depth2) */
1240    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1241    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1242    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1243    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1244    GLboolean IsClientData;      /**< Data owned by client? */
1245    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1246
1247    const struct gl_texture_format *TexFormat;
1248
1249    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1250
1251    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1252    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1253
1254    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1255    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1256
1257    GLuint RowStride;            /**< Padded width in units of texels */
1258    GLuint *ImageOffsets;        /**< if 3D texture: array [Depth] of offsets to
1259                                      each 2D slice in 'Data', in texels */
1260    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1261
1262    /**
1263     * \name For device driver:
1264     */
1265    /*@{*/
1266    void *DriverData;            /**< Arbitrary device driver data */
1267    /*@}*/
1268 };
1269
1270
1271 /**
1272  * Indexes for cube map faces.
1273  */
1274 typedef enum
1275 {
1276    FACE_POS_X = 0,
1277    FACE_NEG_X = 1,
1278    FACE_POS_Y = 2,
1279    FACE_NEG_Y = 3,
1280    FACE_POS_Z = 4,
1281    FACE_NEG_Z = 5,
1282    MAX_FACES = 6
1283 } gl_face_index;
1284
1285
1286 /**
1287  * Texture object state.  Contains the array of mipmap images, border color,
1288  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1289  * color palette.
1290  */
1291 struct gl_texture_object
1292 {
1293    _glthread_Mutex Mutex;       /**< for thread safety */
1294    GLint RefCount;              /**< reference count */
1295    GLuint Name;                 /**< the user-visible texture object ID */
1296    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1297    GLfloat Priority;            /**< in [0,1] */
1298    GLfloat BorderColor[4];      /**< unclamped */
1299    GLenum WrapS;                /**< S-axis texture image wrap mode */
1300    GLenum WrapT;                /**< T-axis texture image wrap mode */
1301    GLenum WrapR;                /**< R-axis texture image wrap mode */
1302    GLenum MinFilter;            /**< minification filter */
1303    GLenum MagFilter;            /**< magnification filter */
1304    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1305    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1306    GLfloat LodBias;             /**< OpenGL 1.4 */
1307    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1308    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1309    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1310    GLenum CompareMode;          /**< GL_ARB_shadow */
1311    GLenum CompareFunc;          /**< GL_ARB_shadow */
1312    GLfloat CompareFailValue;    /**< GL_ARB_shadow_ambient */
1313    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1314    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1315    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1316    GLint CropRect[4];           /**< GL_OES_draw_texture */
1317    GLenum Swizzle[4];           /**< GL_EXT_texture_swizzle */
1318    GLuint _Swizzle;             /**< same as Swizzle, but SWIZZLE_* format */
1319    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1320    GLboolean _Complete;         /**< Is texture object complete? */
1321    GLboolean _RenderToTexture;  /**< Any rendering to this texture? */
1322
1323    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1324    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1325
1326    /** GL_EXT_paletted_texture */
1327    struct gl_color_table Palette;
1328
1329    /**
1330     * \name For device driver.
1331     * Note: instead of attaching driver data to this pointer, it's preferable
1332     * to instead use this struct as a base class for your own texture object
1333     * class.  Driver->NewTextureObject() can be used to implement the
1334     * allocation.
1335     */
1336    void *DriverData;    /**< Arbitrary device driver data */
1337 };
1338
1339
1340 /** Up to four combiner sources are possible with GL_NV_texture_env_combine4 */
1341 #define MAX_COMBINER_TERMS 4
1342
1343
1344 /**
1345  * Texture combine environment state.
1346  */
1347 struct gl_tex_env_combine_state
1348 {
1349    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1350    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1351    /** Source terms: GL_PRIMARY_COLOR, GL_TEXTURE, etc */
1352    GLenum SourceRGB[MAX_COMBINER_TERMS];
1353    GLenum SourceA[MAX_COMBINER_TERMS];
1354    /** Source operands: GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR, etc */
1355    GLenum OperandRGB[MAX_COMBINER_TERMS];
1356    GLenum OperandA[MAX_COMBINER_TERMS];
1357    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1358    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1359    GLuint _NumArgsRGB;   /**< Number of inputs used for the RGB combiner */
1360    GLuint _NumArgsA;     /**< Number of inputs used for the A combiner */
1361 };
1362
1363
1364 /**
1365  * Texture coord generation state.
1366  */
1367 struct gl_texgen
1368 {
1369    GLenum Mode;         /**< GL_EYE_LINEAR, GL_SPHERE_MAP, etc */
1370    GLbitfield _ModeBit; /**< TEXGEN_x bit corresponding to Mode */
1371    GLfloat ObjectPlane[4];
1372    GLfloat EyePlane[4];
1373 };
1374
1375
1376 /**
1377  * Texture unit state.  Contains enable flags, texture environment/function/
1378  * combiners, texgen state, pointers to current texture objects and
1379  * post-filter color tables.
1380  */
1381 struct gl_texture_unit
1382 {
1383    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1384    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1385
1386    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1387    GLfloat EnvColor[4];
1388
1389    struct gl_texgen GenS;
1390    struct gl_texgen GenT;
1391    struct gl_texgen GenR;
1392    struct gl_texgen GenQ;
1393    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1394    GLbitfield _GenFlags;        /**< Bitwise-OR of Gen[STRQ]._ModeBit */
1395
1396    GLfloat LodBias;             /**< for biasing mipmap levels */
1397    GLenum BumpTarget;
1398    GLfloat RotMatrix[4]; /* 2x2 matrix */
1399
1400    /**
1401     * \name GL_EXT_texture_env_combine
1402     */
1403    struct gl_tex_env_combine_state Combine;
1404
1405    /**
1406     * Derived state based on \c EnvMode and the \c BaseFormat of the
1407     * currently enabled texture.
1408     */
1409    struct gl_tex_env_combine_state _EnvMode;
1410
1411    /**
1412     * Currently enabled combiner state.  This will point to either
1413     * \c Combine or \c _EnvMode.
1414     */
1415    struct gl_tex_env_combine_state *_CurrentCombine;
1416
1417    /** Current texture object pointers */
1418    struct gl_texture_object *CurrentTex[NUM_TEXTURE_TARGETS];
1419
1420    /** Points to highest priority, complete and enabled texture object */
1421    struct gl_texture_object *_Current;
1422
1423    /** GL_SGI_texture_color_table */
1424    /*@{*/
1425    struct gl_color_table ColorTable;
1426    struct gl_color_table ProxyColorTable;
1427    GLboolean ColorTableEnabled;
1428    /*@}*/
1429 };
1430
1431
1432 /**
1433  * Texture attribute group (GL_TEXTURE_BIT).
1434  */
1435 struct gl_texture_attrib
1436 {
1437    GLuint CurrentUnit;   /**< GL_ACTIVE_TEXTURE */
1438    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1439
1440    struct gl_texture_object *ProxyTex[NUM_TEXTURE_TARGETS];
1441
1442    /** GL_EXT_shared_texture_palette */
1443    GLboolean SharedPalette;
1444    struct gl_color_table Palette;
1445
1446    /** Texture units/samplers used by vertex or fragment texturing */
1447    GLbitfield _EnabledUnits;
1448
1449    /** Texture coord units/sets used for fragment texturing */
1450    GLbitfield _EnabledCoordUnits;
1451
1452    /** Texture coord units that have texgen enabled */
1453    GLbitfield _TexGenEnabled;
1454
1455    /** Texture coord units that have non-identity matrices */
1456    GLbitfield _TexMatEnabled;
1457
1458    /** Bitwise-OR of all Texture.Unit[i]._GenFlags */
1459    GLbitfield _GenFlags;
1460 };
1461
1462
1463 /**
1464  * Transformation attribute group (GL_TRANSFORM_BIT).
1465  */
1466 struct gl_transform_attrib
1467 {
1468    GLenum MatrixMode;                           /**< Matrix mode */
1469    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1470    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1471    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1472    GLboolean Normalize;                         /**< Normalize all normals? */
1473    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1474    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1475
1476    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1477    GLfloat CullEyePos[4];
1478    GLfloat CullObjPos[4];
1479 };
1480
1481
1482 /**
1483  * Viewport attribute group (GL_VIEWPORT_BIT).
1484  */
1485 struct gl_viewport_attrib
1486 {
1487    GLint X, Y;                  /**< position */
1488    GLsizei Width, Height;       /**< size */
1489    GLfloat Near, Far;           /**< Depth buffer range */
1490    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1491 };
1492
1493
1494 /**
1495  * GL_ARB_vertex/pixel_buffer_object buffer object
1496  */
1497 struct gl_buffer_object
1498 {
1499    GLint RefCount;
1500    GLuint Name;
1501    GLenum Usage;
1502    GLenum Access;
1503    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1504    GLintptr Offset;          /**< mapped offset */
1505    GLsizeiptr Length;        /**< mapped length */
1506    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1507    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1508    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1509 };
1510
1511
1512 /**
1513  * Client pixel packing/unpacking attributes
1514  */
1515 struct gl_pixelstore_attrib
1516 {
1517    GLint Alignment;
1518    GLint RowLength;
1519    GLint SkipPixels;
1520    GLint SkipRows;
1521    GLint ImageHeight;
1522    GLint SkipImages;
1523    GLboolean SwapBytes;
1524    GLboolean LsbFirst;
1525    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1526    GLboolean Invert;        /**< GL_MESA_pack_invert */
1527    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1528 };
1529
1530
1531 /**
1532  * Client vertex array attributes
1533  */
1534 struct gl_client_array
1535 {
1536    GLint Size;                  /**< components per element (1,2,3,4) */
1537    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1538    GLenum Format;               /**< default: GL_RGBA, but may be GL_BGRA */
1539    GLsizei Stride;              /**< user-specified stride */
1540    GLsizei StrideB;             /**< actual stride in bytes */
1541    const GLubyte *Ptr;          /**< Points to array data */
1542    GLboolean Enabled;           /**< Enabled flag is a boolean */
1543    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1544
1545    /**< GL_ARB_vertex_buffer_object */
1546    struct gl_buffer_object *BufferObj;
1547    GLuint _MaxElement;
1548 };
1549
1550
1551 /**
1552  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1553  * extension, but a nice encapsulation in any case.
1554  */
1555 struct gl_array_object
1556 {
1557    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1558    GLuint Name;
1559
1560    GLint RefCount;
1561    _glthread_Mutex Mutex;
1562
1563    /** Conventional vertex arrays */
1564    /*@{*/
1565    struct gl_client_array Vertex;
1566    struct gl_client_array Normal;
1567    struct gl_client_array Color;
1568    struct gl_client_array SecondaryColor;
1569    struct gl_client_array FogCoord;
1570    struct gl_client_array Index;
1571    struct gl_client_array EdgeFlag;
1572    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1573    struct gl_client_array PointSize;
1574    /*@}*/
1575
1576    /** Generic arrays for vertex programs/shaders */
1577    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1578
1579    /** Mask of _NEW_ARRAY_* values indicating which arrays are enabled */
1580    GLbitfield _Enabled;
1581 };
1582
1583
1584 /**
1585  * Vertex array state
1586  */
1587 struct gl_array_attrib
1588 {
1589    struct gl_array_object *ArrayObj;
1590    struct gl_array_object *DefaultArrayObj;
1591
1592    GLint ActiveTexture;         /**< Client Active Texture */
1593    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1594    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1595
1596    GLbitfield NewState;         /**< mask of _NEW_ARRAY_* values */
1597
1598 #if FEATURE_ARB_vertex_buffer_object
1599    struct gl_buffer_object *NullBufferObj;
1600    struct gl_buffer_object *ArrayBufferObj;
1601    struct gl_buffer_object *ElementArrayBufferObj;
1602 #endif
1603    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1604 };
1605
1606
1607 /**
1608  * Feedback buffer state
1609  */
1610 struct gl_feedback
1611 {
1612    GLenum Type;
1613    GLbitfield _Mask;    /**< FB_* bits */
1614    GLfloat *Buffer;
1615    GLuint BufferSize;
1616    GLuint Count;
1617 };
1618
1619
1620 /**
1621  * Selection buffer state
1622  */
1623 struct gl_selection
1624 {
1625    GLuint *Buffer;      /**< selection buffer */
1626    GLuint BufferSize;   /**< size of the selection buffer */
1627    GLuint BufferCount;  /**< number of values in the selection buffer */
1628    GLuint Hits;         /**< number of records in the selection buffer */
1629    GLuint NameStackDepth; /**< name stack depth */
1630    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1631    GLboolean HitFlag;   /**< hit flag */
1632    GLfloat HitMinZ;     /**< minimum hit depth */
1633    GLfloat HitMaxZ;     /**< maximum hit depth */
1634 };
1635
1636
1637 /**
1638  * 1-D Evaluator control points
1639  */
1640 struct gl_1d_map
1641 {
1642    GLuint Order;        /**< Number of control points */
1643    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1644    GLfloat *Points;     /**< Points to contiguous control points */
1645 };
1646
1647
1648 /**
1649  * 2-D Evaluator control points
1650  */
1651 struct gl_2d_map
1652 {
1653    GLuint Uorder;               /**< Number of control points in U dimension */
1654    GLuint Vorder;               /**< Number of control points in V dimension */
1655    GLfloat u1, u2, du;
1656    GLfloat v1, v2, dv;
1657    GLfloat *Points;             /**< Points to contiguous control points */
1658 };
1659
1660
1661 /**
1662  * All evaluator control point state
1663  */
1664 struct gl_evaluators
1665 {
1666    /**
1667     * \name 1-D maps
1668     */
1669    /*@{*/
1670    struct gl_1d_map Map1Vertex3;
1671    struct gl_1d_map Map1Vertex4;
1672    struct gl_1d_map Map1Index;
1673    struct gl_1d_map Map1Color4;
1674    struct gl_1d_map Map1Normal;
1675    struct gl_1d_map Map1Texture1;
1676    struct gl_1d_map Map1Texture2;
1677    struct gl_1d_map Map1Texture3;
1678    struct gl_1d_map Map1Texture4;
1679    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1680    /*@}*/
1681
1682    /**
1683     * \name 2-D maps
1684     */
1685    /*@{*/
1686    struct gl_2d_map Map2Vertex3;
1687    struct gl_2d_map Map2Vertex4;
1688    struct gl_2d_map Map2Index;
1689    struct gl_2d_map Map2Color4;
1690    struct gl_2d_map Map2Normal;
1691    struct gl_2d_map Map2Texture1;
1692    struct gl_2d_map Map2Texture2;
1693    struct gl_2d_map Map2Texture3;
1694    struct gl_2d_map Map2Texture4;
1695    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1696    /*@}*/
1697 };
1698
1699
1700 /**
1701  * Names of the various vertex/fragment program register files, etc.
1702  *
1703  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1704  * All values should fit in a 4-bit field.
1705  *
1706  * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
1707  * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
1708  * be "uniform" variables since they can only be set outside glBegin/End.
1709  * They're also all stored in the same Parameters array.
1710  */
1711 typedef enum
1712 {
1713    PROGRAM_TEMPORARY,   /**< machine->Temporary[] */
1714    PROGRAM_INPUT,       /**< machine->Inputs[] */
1715    PROGRAM_OUTPUT,      /**< machine->Outputs[] */
1716    PROGRAM_VARYING,     /**< machine->Inputs[]/Outputs[] */
1717    PROGRAM_LOCAL_PARAM, /**< gl_program->LocalParams[] */
1718    PROGRAM_ENV_PARAM,   /**< gl_program->Parameters[] */
1719    PROGRAM_STATE_VAR,   /**< gl_program->Parameters[] */
1720    PROGRAM_NAMED_PARAM, /**< gl_program->Parameters[] */
1721    PROGRAM_CONSTANT,    /**< gl_program->Parameters[] */
1722    PROGRAM_UNIFORM,     /**< gl_program->Parameters[] */
1723    PROGRAM_WRITE_ONLY,  /**< A dummy, write-only register */
1724    PROGRAM_ADDRESS,     /**< machine->AddressReg */
1725    PROGRAM_SAMPLER,     /**< for shader samplers, compile-time only */
1726    PROGRAM_UNDEFINED,   /**< Invalid/TBD value */
1727    PROGRAM_FILE_MAX
1728 } gl_register_file;
1729
1730
1731 /** Vertex and fragment instructions */
1732 struct prog_instruction;
1733 struct gl_program_parameter_list;
1734 struct gl_uniform_list;
1735
1736
1737 /**
1738  * Base class for any kind of program object
1739  */
1740 struct gl_program
1741 {
1742    GLuint Id;
1743    GLubyte *String;  /**< Null-terminated program text */
1744    GLint RefCount;
1745    GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
1746    GLenum Format;    /**< String encoding format */
1747    GLboolean Resident;
1748
1749    struct prog_instruction *Instructions;
1750
1751    GLbitfield InputsRead;     /**< Bitmask of which input regs are read */
1752    GLbitfield OutputsWritten; /**< Bitmask of which output regs are written to */
1753    GLbitfield InputFlags[MAX_PROGRAM_INPUTS];   /**< PROG_PARAM_BIT_x flags */
1754    GLbitfield OutputFlags[MAX_PROGRAM_OUTPUTS]; /**< PROG_PARAM_BIT_x flags */
1755    GLbitfield TexturesUsed[MAX_TEXTURE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1756    GLbitfield SamplersUsed;   /**< Bitfield of which samplers are used */
1757    GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */
1758
1759
1760    /** Named parameters, constants, etc. from program text */
1761    struct gl_program_parameter_list *Parameters;
1762    /** Numbered local parameters */
1763    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1764
1765    /** Vertex/fragment shader varying vars */
1766    struct gl_program_parameter_list *Varying;
1767    /** Vertex program user-defined attributes */
1768    struct gl_program_parameter_list *Attributes;
1769
1770    /** Map from sampler unit to texture unit (set by glUniform1i()) */
1771    GLubyte SamplerUnits[MAX_SAMPLERS];
1772    /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
1773    GLubyte SamplerTargets[MAX_SAMPLERS];
1774
1775    /** Logical counts */
1776    /*@{*/
1777    GLuint NumInstructions;
1778    GLuint NumTemporaries;
1779    GLuint NumParameters;
1780    GLuint NumAttributes;
1781    GLuint NumAddressRegs;
1782    GLuint NumAluInstructions;
1783    GLuint NumTexInstructions;
1784    GLuint NumTexIndirections;
1785    /*@}*/
1786    /** Native, actual h/w counts */
1787    /*@{*/
1788    GLuint NumNativeInstructions;
1789    GLuint NumNativeTemporaries;
1790    GLuint NumNativeParameters;
1791    GLuint NumNativeAttributes;
1792    GLuint NumNativeAddressRegs;
1793    GLuint NumNativeAluInstructions;
1794    GLuint NumNativeTexInstructions;
1795    GLuint NumNativeTexIndirections;
1796    /*@}*/
1797 };
1798
1799
1800 /** Vertex program object */
1801 struct gl_vertex_program
1802 {
1803    struct gl_program Base;   /**< base class */
1804    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1805    GLboolean IsPositionInvariant;
1806    void *TnlData;               /**< should probably use Base.DriverData */
1807 };
1808
1809
1810 /** Fragment program object */
1811 struct gl_fragment_program
1812 {
1813    struct gl_program Base;   /**< base class */
1814    GLenum FogOption;
1815    GLboolean UsesKill;          /**< shader uses KIL instruction */
1816    GLboolean UsesPointCoord;    /**< shader uses gl_PointCoord */
1817    GLboolean UsesFrontFacing;   /**< shader used gl_FrontFacing */
1818    GLboolean UsesFogFragCoord;  /**< shader used gl_FogFragCoord */
1819 };
1820
1821
1822 /**
1823  * State common to vertex and fragment programs.
1824  */
1825 struct gl_program_state
1826 {
1827    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1828    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1829 };
1830
1831
1832 /**
1833  * Context state for vertex programs.
1834  */
1835 struct gl_vertex_program_state
1836 {
1837    GLboolean Enabled;            /**< User-set GL_VERTEX_PROGRAM_ARB/NV flag */
1838    GLboolean _Enabled;           /**< Enabled and _valid_ user program? */
1839    GLboolean PointSizeEnabled;   /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1840    GLboolean TwoSideEnabled;     /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1841    struct gl_vertex_program *Current;  /**< User-bound vertex program */
1842
1843    /** Currently enabled and valid vertex program (including internal
1844     * programs, user-defined vertex programs and GLSL vertex shaders).
1845     * This is the program we must use when rendering.
1846     */
1847    struct gl_vertex_program *_Current;
1848
1849    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1850
1851    /* For GL_NV_vertex_program only: */
1852    GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
1853    GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];
1854
1855    /** Should fixed-function T&L be implemented with a vertex prog? */
1856    GLboolean _MaintainTnlProgram;
1857
1858    /** Program to emulate fixed-function T&L (see above) */
1859    struct gl_vertex_program *_TnlProgram;
1860
1861    /** Cache of fixed-function programs */
1862    struct gl_program_cache *Cache;
1863
1864    GLboolean _Overriden;
1865 };
1866
1867
1868 /**
1869  * Context state for fragment programs.
1870  */
1871 struct gl_fragment_program_state
1872 {
1873    GLboolean Enabled;     /**< User-set fragment program enable flag */
1874    GLboolean _Enabled;    /**< Enabled and _valid_ user program? */
1875    struct gl_fragment_program *Current;  /**< User-bound fragment program */
1876
1877    /** Currently enabled and valid fragment program (including internal
1878     * programs, user-defined fragment programs and GLSL fragment shaders).
1879     * This is the program we must use when rendering.
1880     */
1881    struct gl_fragment_program *_Current;
1882
1883    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1884
1885    /** Should fixed-function texturing be implemented with a fragment prog? */
1886    GLboolean _MaintainTexEnvProgram;
1887
1888    /** Program to emulate fixed-function texture env/combine (see above) */
1889    struct gl_fragment_program *_TexEnvProgram;
1890
1891    /** Cache of fixed-function programs */
1892    struct gl_program_cache *Cache;
1893 };
1894
1895
1896 /**
1897  * ATI_fragment_shader runtime state
1898  */
1899 #define ATI_FS_INPUT_PRIMARY 0
1900 #define ATI_FS_INPUT_SECONDARY 1
1901
1902 struct atifs_instruction;
1903 struct atifs_setupinst;
1904
1905 /**
1906  * ATI fragment shader
1907  */
1908 struct ati_fragment_shader
1909 {
1910    GLuint Id;
1911    GLint RefCount;
1912    struct atifs_instruction *Instructions[2];
1913    struct atifs_setupinst *SetupInst[2];
1914    GLfloat Constants[8][4];
1915    GLbitfield LocalConstDef;  /** Indicates which constants have been set */
1916    GLubyte numArithInstr[2];
1917    GLubyte regsAssigned[2];
1918    GLubyte NumPasses;         /** 1 or 2 */
1919    GLubyte cur_pass;
1920    GLubyte last_optype;
1921    GLboolean interpinp1;
1922    GLboolean isValid;
1923    GLuint swizzlerq;
1924 };
1925
1926 /**
1927  * Context state for GL_ATI_fragment_shader
1928  */
1929 struct gl_ati_fragment_shader_state
1930 {
1931    GLboolean Enabled;
1932    GLboolean _Enabled;                      /** enabled and valid shader? */
1933    GLboolean Compiling;
1934    GLfloat GlobalConstants[8][4];
1935    struct ati_fragment_shader *Current;
1936 };
1937
1938
1939 /**
1940  * Occlusion/timer query object.
1941  */
1942 struct gl_query_object
1943 {
1944    GLenum Target;      /**< The query target, when active */
1945    GLuint Id;          /**< hash table ID/name */
1946    GLuint64EXT Result; /**< the counter */
1947    GLboolean Active;   /**< inside Begin/EndQuery */
1948    GLboolean Ready;    /**< result is ready? */
1949 };
1950
1951
1952 /**
1953  * Context state for query objects.
1954  */
1955 struct gl_query_state
1956 {
1957    struct _mesa_HashTable *QueryObjects;
1958    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
1959    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
1960 };
1961
1962
1963 /** Set by #pragma directives */
1964 struct gl_sl_pragmas
1965 {
1966    GLboolean IgnoreOptimize;  /**< ignore #pragma optimize(on/off) ? */
1967    GLboolean IgnoreDebug;     /**< ignore #pragma debug(on/off) ? */
1968    GLboolean Optimize;  /**< defaults on */
1969    GLboolean Debug;     /**< defaults off */
1970 };
1971
1972
1973 /**
1974  * A GLSL vertex or fragment shader object.
1975  */
1976 struct gl_shader
1977 {
1978    GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER (first field!) */
1979    GLuint Name;  /**< AKA the handle */
1980    GLint RefCount;  /**< Reference count */
1981    GLboolean DeletePending;
1982    GLboolean CompileStatus;
1983    GLboolean Main;  /**< shader defines main() */
1984    GLboolean UnresolvedRefs;
1985    const GLchar *Source;  /**< Source code string */
1986    struct gl_program *Program;  /**< Post-compile assembly code */
1987    GLchar *InfoLog;
1988    struct gl_sl_pragmas Pragmas;
1989 };
1990
1991
1992 /**
1993  * A GLSL program object.
1994  * Basically a linked collection of vertex and fragment shaders.
1995  */
1996 struct gl_shader_program
1997 {
1998    GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
1999    GLuint Name;  /**< aka handle or ID */
2000    GLint RefCount;  /**< Reference count */
2001    GLboolean DeletePending;
2002
2003    GLuint NumShaders;          /**< number of attached shaders */
2004    struct gl_shader **Shaders; /**< List of attached the shaders */
2005
2006    /** User-defined attribute bindings (glBindAttribLocation) */
2007    struct gl_program_parameter_list *Attributes;
2008
2009    /* post-link info: */
2010    struct gl_vertex_program *VertexProgram;     /**< Linked vertex program */
2011    struct gl_fragment_program *FragmentProgram; /**< Linked fragment prog */
2012    struct gl_uniform_list *Uniforms;
2013    struct gl_program_parameter_list *Varying;
2014    GLboolean LinkStatus;   /**< GL_LINK_STATUS */
2015    GLboolean Validated;
2016    GLchar *InfoLog;
2017 };
2018
2019
2020 #define GLSL_DUMP      0x1  /**< Dump shaders to stdout */
2021 #define GLSL_LOG       0x2  /**< Write shaders to files */
2022 #define GLSL_OPT       0x4  /**< Force optimizations (override pragmas) */
2023 #define GLSL_NO_OPT    0x8  /**< Force no optimizations (override pragmas) */
2024 #define GLSL_UNIFORMS 0x10  /**< Print glUniform calls */
2025
2026
2027 /**
2028  * Context state for GLSL vertex/fragment shaders.
2029  */
2030 struct gl_shader_state
2031 {
2032    struct gl_shader_program *CurrentProgram; /**< The user-bound program */
2033    /** Driver-selectable options: */
2034    GLboolean EmitHighLevelInstructions; /**< IF/ELSE/ENDIF vs. BRA, etc. */
2035    GLboolean EmitContReturn;            /**< Emit CONT/RET opcodes? */
2036    GLboolean EmitCondCodes;             /**< Use condition codes? */
2037    GLboolean EmitComments;              /**< Annotated instructions */
2038    void *MemPool;
2039    GLbitfield Flags;                    /**< Mask of GLSL_x flags */
2040    struct gl_sl_pragmas DefaultPragmas; /**< Default #pragma settings */
2041 };
2042
2043
2044 /**
2045  * State which can be shared by multiple contexts:
2046  */
2047 struct gl_shared_state
2048 {
2049    _glthread_Mutex Mutex;                  /**< for thread safety */
2050    GLint RefCount;                         /**< Reference count */
2051    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2052    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2053
2054    /** Default texture objects (shared by all texture units) */
2055    struct gl_texture_object *DefaultTex[NUM_TEXTURE_TARGETS];
2056
2057    /** Fallback texture used when a bound texture is incomplete */
2058    struct gl_texture_object *FallbackTex;
2059
2060    /**
2061     * \name Thread safety and statechange notification for texture
2062     * objects.
2063     *
2064     * \todo Improve the granularity of locking.
2065     */
2066    /*@{*/
2067    _glthread_Mutex TexMutex;            /**< texobj thread safety */
2068    GLuint TextureStateStamp;            /**< state notification for shared tex */
2069    /*@}*/
2070
2071
2072    /**
2073     * \name Vertex/fragment programs
2074     */
2075    /*@{*/
2076    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2077 #if FEATURE_ARB_vertex_program
2078    struct gl_vertex_program *DefaultVertexProgram;
2079 #endif
2080 #if FEATURE_ARB_fragment_program
2081    struct gl_fragment_program *DefaultFragmentProgram;
2082 #endif
2083    /*@}*/
2084
2085 #if FEATURE_ATI_fragment_shader
2086    struct _mesa_HashTable *ATIShaders;
2087    struct ati_fragment_shader *DefaultFragmentShader;
2088 #endif
2089
2090 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2091    struct _mesa_HashTable *BufferObjects;
2092 #endif
2093
2094 #if FEATURE_ARB_shader_objects
2095    /** Table of both gl_shader and gl_shader_program objects */
2096    struct _mesa_HashTable *ShaderObjects;
2097 #endif
2098
2099 #if FEATURE_EXT_framebuffer_object
2100    struct _mesa_HashTable *RenderBuffers;
2101    struct _mesa_HashTable *FrameBuffers;
2102 #endif
2103
2104    /** Objects associated with the GL_APPLE_vertex_array_object extension. */
2105    struct _mesa_HashTable *ArrayObjects;
2106
2107    void *DriverData;  /**< Device driver shared state */
2108 };
2109
2110
2111
2112
2113 /**
2114  * A renderbuffer stores colors or depth values or stencil values.
2115  * A framebuffer object will have a collection of these.
2116  * Data are read/written to the buffer with a handful of Get/Put functions.
2117  *
2118  * Instances of this object are allocated with the Driver's NewRenderbuffer
2119  * hook.  Drivers will likely wrap this class inside a driver-specific
2120  * class to simulate inheritance.
2121  */
2122 struct gl_renderbuffer
2123 {
2124 #define RB_MAGIC 0xaabbccdd
2125    int Magic; /** XXX TEMPORARY DEBUG INFO */
2126    _glthread_Mutex Mutex;                  /**< for thread safety */
2127    GLuint ClassID;        /**< Useful for drivers */
2128    GLuint Name;
2129    GLint RefCount;
2130    GLuint Width, Height;
2131    GLenum InternalFormat; /**< The user-specified format */
2132    GLenum _ActualFormat;  /**< The driver-chosen format */
2133    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2134                                GL_STENCIL_INDEX. */
2135    GLenum ColorEncoding; /**< GL_LINEAR or GL_SRGB */
2136    GLenum ComponentType; /**< GL_FLOAT, GL_INT, GL_UNSIGNED_INT,
2137                               GL_UNSIGNED_NORMALIZED or GL_INDEX */
2138    GLubyte RedBits;      /**< Bits of red per pixel */
2139    GLubyte GreenBits;
2140    GLubyte BlueBits;
2141    GLubyte AlphaBits;
2142    GLubyte IndexBits;
2143    GLubyte DepthBits;
2144    GLubyte StencilBits;
2145    GLubyte NumSamples;
2146
2147    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2148    GLvoid *Data;        /**< This may not be used by some kinds of RBs */
2149
2150    /* Used to wrap one renderbuffer around another: */
2151    struct gl_renderbuffer *Wrapped;
2152
2153    /* Delete this renderbuffer */
2154    void (*Delete)(struct gl_renderbuffer *rb);
2155
2156    /* Allocate new storage for this renderbuffer */
2157    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2158                              GLenum internalFormat,
2159                              GLuint width, GLuint height);
2160
2161    /* Lock/Unlock are called before/after calling the Get/Put functions.
2162     * Not sure this is the right place for these yet.
2163    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2164    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2165     */
2166
2167    /* Return a pointer to the element/pixel at (x,y).
2168     * Should return NULL if the buffer memory can't be directly addressed.
2169     */
2170    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2171                        GLint x, GLint y);
2172
2173    /* Get/Read a row of values.
2174     * The values will be of format _BaseFormat and type DataType.
2175     */
2176    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2177                   GLint x, GLint y, void *values);
2178
2179    /* Get/Read values at arbitrary locations.
2180     * The values will be of format _BaseFormat and type DataType.
2181     */
2182    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2183                      const GLint x[], const GLint y[], void *values);
2184
2185    /* Put/Write a row of values.
2186     * The values will be of format _BaseFormat and type DataType.
2187     */
2188    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2189                   GLint x, GLint y, const void *values, const GLubyte *mask);
2190
2191    /* Put/Write a row of RGB values.  This is a special-case routine that's
2192     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2193     * a common case for glDrawPixels and some triangle routines.
2194     * The values will be of format GL_RGB and type DataType.
2195     */
2196    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2197                     GLint x, GLint y, const void *values, const GLubyte *mask);
2198
2199
2200    /* Put/Write a row of identical values.
2201     * The values will be of format _BaseFormat and type DataType.
2202     */
2203    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2204                      GLint x, GLint y, const void *value, const GLubyte *mask);
2205
2206    /* Put/Write values at arbitrary locations.
2207     * The values will be of format _BaseFormat and type DataType.
2208     */
2209    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2210                      const GLint x[], const GLint y[], const void *values,
2211                      const GLubyte *mask);
2212    /* Put/Write identical values at arbitrary locations.
2213     * The values will be of format _BaseFormat and type DataType.
2214     */
2215    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2216                          GLuint count, const GLint x[], const GLint y[],
2217                          const void *value, const GLubyte *mask);
2218 };
2219
2220
2221 /**
2222  * A renderbuffer attachment points to either a texture object (and specifies
2223  * a mipmap level, cube face or 3D texture slice) or points to a renderbuffer.
2224  */
2225 struct gl_renderbuffer_attachment
2226 {
2227    GLenum Type;  /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
2228    GLboolean Complete;
2229
2230    /**
2231     * If \c Type is \c GL_RENDERBUFFER_EXT, this stores a pointer to the
2232     * application supplied renderbuffer object.
2233     */
2234    struct gl_renderbuffer *Renderbuffer;
2235
2236    /**
2237     * If \c Type is \c GL_TEXTURE, this stores a pointer to the application
2238     * supplied texture object.
2239     */
2240    struct gl_texture_object *Texture;
2241    GLuint TextureLevel; /**< Attached mipmap level. */
2242    GLuint CubeMapFace;  /**< 0 .. 5, for cube map textures. */
2243    GLuint Zoffset;      /**< Slice for 3D textures,  or layer for both 1D
2244                          * and 2D array textures */
2245 };
2246
2247
2248 /**
2249  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2250  * In C++ terms, think of this as a base class from which device drivers
2251  * will make derived classes.
2252  */
2253 struct gl_framebuffer
2254 {
2255    _glthread_Mutex Mutex;  /**< for thread safety */
2256    /**
2257     * If zero, this is a window system framebuffer.  If non-zero, this
2258     * is a FBO framebuffer; note that for some devices (i.e. those with
2259     * a natural pixel coordinate system for FBOs that differs from the
2260     * OpenGL/Mesa coordinate system), this means that the viewport,
2261     * polygon face orientation, and polygon stipple will have to be inverted.
2262     */
2263    GLuint Name;
2264
2265    GLint RefCount;
2266    GLboolean DeletePending;
2267
2268    /**
2269     * The framebuffer's visual. Immutable if this is a window system buffer.
2270     * Computed from attachments if user-made FBO.
2271     */
2272    GLvisual Visual;
2273
2274    GLboolean Initialized;
2275
2276    GLuint Width, Height;        /**< size of frame buffer in pixels */
2277
2278    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2279    /*@{*/
2280    GLint _Xmin, _Xmax;  /**< inclusive */
2281    GLint _Ymin, _Ymax;  /**< exclusive */
2282    /*@}*/
2283
2284    /** \name  Derived Z buffer stuff */
2285    /*@{*/
2286    GLuint _DepthMax;    /**< Max depth buffer value */
2287    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2288    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2289    /*@}*/
2290
2291    /** One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2292    GLenum _Status;
2293
2294    /** Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2295    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2296
2297    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2298     * attribute group and GL_PIXEL attribute group, respectively.
2299     */
2300    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2301    GLenum ColorReadBuffer;
2302
2303    /** Computed from ColorDraw/ReadBuffer above */
2304    GLuint _NumColorDrawBuffers;
2305    GLint _ColorDrawBufferIndexes[MAX_DRAW_BUFFERS]; /**< BUFFER_x or -1 */
2306    GLint _ColorReadBufferIndex; /* -1 = None */
2307    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS];
2308    struct gl_renderbuffer *_ColorReadBuffer;
2309
2310    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2311     * depth/stencil buffers attached above. */
2312    struct gl_renderbuffer *_DepthBuffer;
2313    struct gl_renderbuffer *_StencilBuffer;
2314
2315    /** Delete this framebuffer */
2316    void (*Delete)(struct gl_framebuffer *fb);
2317 };
2318
2319
2320 /**
2321  * Limits for vertex and fragment programs.
2322  */
2323 struct gl_program_constants
2324 {
2325    /* logical limits */
2326    GLuint MaxInstructions;
2327    GLuint MaxAluInstructions; /* fragment programs only, for now */
2328    GLuint MaxTexInstructions; /* fragment programs only, for now */
2329    GLuint MaxTexIndirections; /* fragment programs only, for now */
2330    GLuint MaxAttribs;
2331    GLuint MaxTemps;
2332    GLuint MaxAddressRegs; /* vertex program only, for now */
2333    GLuint MaxParameters;
2334    GLuint MaxLocalParams;
2335    GLuint MaxEnvParams;
2336    /* native/hardware limits */
2337    GLuint MaxNativeInstructions;
2338    GLuint MaxNativeAluInstructions; /* fragment programs only, for now */
2339    GLuint MaxNativeTexInstructions; /* fragment programs only, for now */
2340    GLuint MaxNativeTexIndirections; /* fragment programs only, for now */
2341    GLuint MaxNativeAttribs;
2342    GLuint MaxNativeTemps;
2343    GLuint MaxNativeAddressRegs; /* vertex program only, for now */
2344    GLuint MaxNativeParameters;
2345    /* For shaders */
2346    GLuint MaxUniformComponents;
2347 };
2348
2349
2350 /**
2351  * Constants which may be overridden by device driver during context creation
2352  * but are never changed after that.
2353  */
2354 struct gl_constants
2355 {
2356    GLint MaxTextureLevels;      /**< Max mipmap levels. */
2357    GLint Max3DTextureLevels;    /**< Max mipmap levels for 3D textures */
2358    GLint MaxCubeTextureLevels;  /**< Max mipmap levels for cube textures */
2359    GLint MaxArrayTextureLayers; /**< Max layers in array textures */
2360    GLint MaxTextureRectSize;    /**< Max rectangle texture size, in pixes */
2361    GLuint MaxTextureCoordUnits;
2362    GLuint MaxTextureImageUnits;
2363    GLuint MaxVertexTextureImageUnits;
2364    GLuint MaxTextureUnits;           /**< = MIN(CoordUnits, ImageUnits) */
2365    GLfloat MaxTextureMaxAnisotropy;  /**< GL_EXT_texture_filter_anisotropic */
2366    GLfloat MaxTextureLodBias;        /**< GL_EXT_texture_lod_bias */
2367
2368    GLuint MaxArrayLockSize;
2369
2370    GLint SubPixelBits;
2371
2372    GLfloat MinPointSize, MaxPointSize;       /**< aliased */
2373    GLfloat MinPointSizeAA, MaxPointSizeAA;   /**< antialiased */
2374    GLfloat PointSizeGranularity;
2375    GLfloat MinLineWidth, MaxLineWidth;       /**< aliased */
2376    GLfloat MinLineWidthAA, MaxLineWidthAA;   /**< antialiased */
2377    GLfloat LineWidthGranularity;
2378
2379    GLuint MaxColorTableSize;
2380    GLuint MaxConvolutionWidth;
2381    GLuint MaxConvolutionHeight;
2382
2383    GLuint MaxClipPlanes;
2384    GLuint MaxLights;
2385    GLfloat MaxShininess;                     /**< GL_NV_light_max_exponent */
2386    GLfloat MaxSpotExponent;                  /**< GL_NV_light_max_exponent */
2387
2388    GLuint MaxViewportWidth, MaxViewportHeight;
2389
2390    struct gl_program_constants VertexProgram;   /**< GL_ARB_vertex_program */
2391    struct gl_program_constants FragmentProgram; /**< GL_ARB_fragment_program */
2392    GLuint MaxProgramMatrices;
2393    GLuint MaxProgramMatrixStackDepth;
2394
2395    /** vertex array / buffer object bounds checking */
2396    GLboolean CheckArrayBounds;
2397
2398    GLuint MaxDrawBuffers;    /**< GL_ARB_draw_buffers */
2399
2400    GLenum ColorReadFormat;   /**< GL_OES_read_format */
2401    GLenum ColorReadType;     /**< GL_OES_read_format */
2402
2403    GLuint MaxColorAttachments;   /**< GL_EXT_framebuffer_object */
2404    GLuint MaxRenderbufferSize;   /**< GL_EXT_framebuffer_object */
2405    GLuint MaxSamples;            /**< GL_ARB_framebuffer_object */
2406
2407    GLuint MaxVarying;  /**< Number of float[4] varying parameters */
2408
2409    GLbitfield SupportedBumpUnits; /**> units supporting GL_ATI_envmap_bumpmap as targets */
2410 };
2411
2412
2413 /**
2414  * Enable flag for each OpenGL extension.  Different device drivers will
2415  * enable different extensions at runtime.
2416  */
2417 struct gl_extensions
2418 {
2419    GLboolean dummy;  /* don't remove this! */
2420    GLboolean ARB_depth_texture;
2421    GLboolean ARB_draw_buffers;
2422    GLboolean ARB_fragment_program;
2423    GLboolean ARB_fragment_program_shadow;
2424    GLboolean ARB_fragment_shader;
2425    GLboolean ARB_framebuffer_object;
2426    GLboolean ARB_half_float_pixel;
2427    GLboolean ARB_imaging;
2428    GLboolean ARB_multisample;
2429    GLboolean ARB_multitexture;
2430    GLboolean ARB_occlusion_query;
2431    GLboolean ARB_point_sprite;
2432    GLboolean ARB_shader_objects;
2433    GLboolean ARB_shading_language_100;
2434    GLboolean ARB_shading_language_120;
2435    GLboolean ARB_shadow;
2436    GLboolean ARB_shadow_ambient; /* or GL_ARB_shadow_ambient */
2437    GLboolean ARB_texture_border_clamp;
2438    GLboolean ARB_texture_compression;
2439    GLboolean ARB_texture_cube_map;
2440    GLboolean ARB_texture_env_combine;
2441    GLboolean ARB_texture_env_crossbar;
2442    GLboolean ARB_texture_env_dot3;
2443    GLboolean ARB_texture_float;
2444    GLboolean ARB_texture_mirrored_repeat;
2445    GLboolean ARB_texture_non_power_of_two;
2446    GLboolean ARB_transpose_matrix;
2447    GLboolean ARB_vertex_buffer_object;
2448    GLboolean ARB_vertex_program;
2449    GLboolean ARB_vertex_shader;
2450    GLboolean ARB_window_pos;
2451    GLboolean EXT_abgr;
2452    GLboolean EXT_bgra;
2453    GLboolean EXT_blend_color;
2454    GLboolean EXT_blend_equation_separate;
2455    GLboolean EXT_blend_func_separate;
2456    GLboolean EXT_blend_logic_op;
2457    GLboolean EXT_blend_minmax;
2458    GLboolean EXT_blend_subtract;
2459    GLboolean EXT_clip_volume_hint;
2460    GLboolean EXT_cull_vertex;
2461    GLboolean EXT_convolution;
2462    GLboolean EXT_compiled_vertex_array;
2463    GLboolean EXT_copy_texture;
2464    GLboolean EXT_depth_bounds_test;
2465    GLboolean EXT_draw_range_elements;
2466    GLboolean EXT_framebuffer_object;
2467    GLboolean EXT_fog_coord;
2468    GLboolean EXT_framebuffer_blit;
2469    GLboolean EXT_gpu_program_parameters;
2470    GLboolean EXT_histogram;
2471    GLboolean EXT_multi_draw_arrays;
2472    GLboolean EXT_paletted_texture;
2473    GLboolean EXT_packed_depth_stencil;
2474    GLboolean EXT_packed_pixels;
2475    GLboolean EXT_pixel_buffer_object;
2476    GLboolean EXT_point_parameters;
2477    GLboolean EXT_polygon_offset;
2478    GLboolean EXT_rescale_normal;
2479    GLboolean EXT_shadow_funcs;
2480    GLboolean EXT_secondary_color;
2481    GLboolean EXT_separate_specular_color;
2482    GLboolean EXT_shared_texture_palette;
2483    GLboolean EXT_stencil_wrap;
2484    GLboolean EXT_stencil_two_side;
2485    GLboolean EXT_subtexture;
2486    GLboolean EXT_texture;
2487    GLboolean EXT_texture_object;
2488    GLboolean EXT_texture3D;
2489    GLboolean EXT_texture_compression_s3tc;
2490    GLboolean EXT_texture_env_add;
2491    GLboolean EXT_texture_env_combine;
2492    GLboolean EXT_texture_env_dot3;
2493    GLboolean EXT_texture_filter_anisotropic;
2494    GLboolean EXT_texture_lod_bias;
2495    GLboolean EXT_texture_mirror_clamp;
2496    GLboolean EXT_texture_sRGB;
2497    GLboolean EXT_texture_swizzle;
2498    GLboolean EXT_timer_query;
2499    GLboolean EXT_vertex_array;
2500    GLboolean EXT_vertex_array_bgra;
2501    GLboolean EXT_vertex_array_set;
2502    /* vendor extensions */
2503    GLboolean APPLE_client_storage;
2504    GLboolean APPLE_packed_pixels;
2505    GLboolean APPLE_vertex_array_object;
2506    GLboolean ATI_envmap_bumpmap;
2507    GLboolean ATI_texture_mirror_once;
2508    GLboolean ATI_texture_env_combine3;
2509    GLboolean ATI_fragment_shader;
2510    GLboolean ATI_separate_stencil;
2511    GLboolean IBM_rasterpos_clip;
2512    GLboolean IBM_multimode_draw_arrays;
2513    GLboolean MESA_pack_invert;
2514    GLboolean MESA_packed_depth_stencil;
2515    GLboolean MESA_resize_buffers;
2516    GLboolean MESA_ycbcr_texture;
2517    GLboolean MESA_texture_array;
2518    GLboolean MESA_texture_signed_rgba;
2519    GLboolean NV_blend_square;
2520    GLboolean NV_fragment_program;
2521    GLboolean NV_light_max_exponent;
2522    GLboolean NV_point_sprite;
2523    GLboolean NV_texgen_reflection;
2524    GLboolean NV_texture_env_combine4;
2525    GLboolean NV_texture_rectangle;
2526    GLboolean NV_vertex_program;
2527    GLboolean NV_vertex_program1_1;
2528    GLboolean OES_read_format;
2529    GLboolean SGI_color_matrix;
2530    GLboolean SGI_color_table;
2531    GLboolean SGI_texture_color_table;
2532    GLboolean SGIS_generate_mipmap;
2533    GLboolean SGIS_texture_edge_clamp;
2534    GLboolean SGIS_texture_lod;
2535    GLboolean TDFX_texture_compression_FXT1;
2536    GLboolean S3_s3tc;
2537    /** The extension string */
2538    const GLubyte *String;
2539 };
2540
2541
2542 /**
2543  * A stack of matrices (projection, modelview, color, texture, etc).
2544  */
2545 struct gl_matrix_stack
2546 {
2547    GLmatrix *Top;      /**< points into Stack */
2548    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2549    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2550    GLuint MaxDepth;    /**< size of Stack[] array */
2551    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2552 };
2553
2554
2555 /**
2556  * \name Bits for image transfer operations
2557  * \sa __GLcontextRec::ImageTransferState.
2558  */
2559 /*@{*/
2560 #define IMAGE_SCALE_BIAS_BIT                      0x1
2561 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2562 #define IMAGE_MAP_COLOR_BIT                       0x4
2563 #define IMAGE_COLOR_TABLE_BIT                     0x8
2564 #define IMAGE_CONVOLUTION_BIT                     0x10
2565 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2566 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2567 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2568 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2569 #define IMAGE_HISTOGRAM_BIT                       0x200
2570 #define IMAGE_MIN_MAX_BIT                         0x400
2571 #define IMAGE_CLAMP_BIT                           0x800
2572
2573
2574 /** Pixel Transfer ops up to convolution */
2575 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2576                                     IMAGE_SHIFT_OFFSET_BIT |   \
2577                                     IMAGE_MAP_COLOR_BIT |      \
2578                                     IMAGE_COLOR_TABLE_BIT)
2579
2580 /** Pixel transfer ops after convolution */
2581 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2582                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2583                                      IMAGE_COLOR_MATRIX_BIT |                 \
2584                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2585                                      IMAGE_HISTOGRAM_BIT |                    \
2586                                      IMAGE_MIN_MAX_BIT)
2587 /*@}*/
2588
2589
2590 /**
2591  * \name Bits to indicate what state has changed.
2592  *
2593  * 4 unused flags.
2594  */
2595 /*@{*/
2596 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2597 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2598 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2599 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2600 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2601 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2602 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2603 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2604 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2605 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2606 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2607 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2608 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2609 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2610 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2611 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2612 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2613 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2614 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2615 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2616 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2617 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2618 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2619 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2620 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2621 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2622 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2623 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2624 #define _NEW_CURRENT_ATTRIB     0x10000000  /**< __GLcontextRec::Current */
2625 #define _NEW_PROGRAM_CONSTANTS  0x20000000
2626 #define _NEW_ALL ~0
2627 /*@}*/
2628
2629
2630 /**
2631  * \name Bits to track array state changes
2632  *
2633  * Also used to summarize array enabled.
2634  */
2635 /*@{*/
2636 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2637 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2638 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2639 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2640 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2641 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2642 #define _NEW_ARRAY_INDEX            VERT_BIT_COLOR_INDEX
2643 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_EDGEFLAG
2644 #define _NEW_ARRAY_POINT_SIZE       VERT_BIT_COLOR_INDEX  /* aliased */
2645 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2646 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2647 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2648 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2649 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2650 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2651 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2652 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2653 #define _NEW_ARRAY_ATTRIB_0         VERT_BIT_GENERIC0  /* start at bit 16 */
2654 #define _NEW_ARRAY_ALL              0xffffffff
2655
2656
2657 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2658 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2659 /*@}*/
2660
2661
2662
2663 /**
2664  * \name A bunch of flags that we think might be useful to drivers.
2665  *
2666  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2667  */
2668 /*@{*/
2669 #define DD_FLATSHADE                0x1
2670 #define DD_SEPARATE_SPECULAR        0x2
2671 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2672 #define DD_TRI_LIGHT_TWOSIDE        0x8
2673 #define DD_TRI_UNFILLED             0x10
2674 #define DD_TRI_SMOOTH               0x20
2675 #define DD_TRI_STIPPLE              0x40
2676 #define DD_TRI_OFFSET               0x80
2677 #define DD_LINE_SMOOTH              0x100
2678 #define DD_LINE_STIPPLE             0x200
2679 #define DD_LINE_WIDTH               0x400
2680 #define DD_POINT_SMOOTH             0x800
2681 #define DD_POINT_SIZE               0x1000
2682 #define DD_POINT_ATTEN              0x2000
2683 #define DD_TRI_TWOSTENCIL           0x4000
2684 /*@}*/
2685
2686
2687 /**
2688  * \name Define the state changes under which each of these bits might change
2689  */
2690 /*@{*/
2691 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2692 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2693 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2694 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2695 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2696 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2697 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2698 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2699 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2700 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2701 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2702 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2703 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2704 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2705 /*@}*/
2706
2707
2708 /**
2709  * Composite state flags
2710  */
2711 /*@{*/
2712 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2713                                            _NEW_TEXTURE |       \
2714                                            _NEW_POINT |         \
2715                                            _NEW_PROGRAM |       \
2716                                            _NEW_MODELVIEW)
2717
2718 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2719                                            _NEW_TEXTURE)
2720
2721 #define _MESA_NEW_TRANSFER_STATE          (_NEW_PIXEL |         \
2722                                            _NEW_COLOR_MATRIX)
2723 /*@}*/
2724
2725
2726
2727
2728 /* This has to be included here. */
2729 #include "dd.h"
2730
2731
2732 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2733
2734 /**
2735  * Core Mesa's support for tnl modules:
2736  */
2737 struct gl_tnl_module
2738 {
2739    /**
2740     * Vertex format to be lazily swapped into current dispatch.
2741     */
2742    const GLvertexformat *Current;
2743
2744    /**
2745     * \name Record of functions swapped out.
2746     * On restore, only need to swap these functions back in.
2747     */
2748    /*@{*/
2749    struct {
2750        _glapi_proc * location;
2751        _glapi_proc function;
2752    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2753    GLuint SwapCount;
2754    /*@}*/
2755 };
2756
2757
2758 /**
2759  * Display list flags.
2760  * Strictly this is a tnl-private concept, but it doesn't seem
2761  * worthwhile adding a tnl private structure just to hold this one bit
2762  * of information:
2763  */
2764 #define DLIST_DANGLING_REFS     0x1
2765
2766
2767 /** Opaque declaration of display list payload data type */
2768 union gl_dlist_node;
2769
2770
2771 /**
2772  * Provide a location where information about a display list can be
2773  * collected.  Could be extended with driverPrivate structures,
2774  * etc. in the future.
2775  */
2776 struct gl_display_list
2777 {
2778    GLuint Name;
2779    GLbitfield Flags;  /**< DLIST_x flags */
2780    /** The dlist commands are in a linked list of nodes */
2781    union gl_dlist_node *Head;
2782 };
2783
2784
2785 /**
2786  * State used during display list compilation and execution.
2787  */
2788 struct gl_dlist_state
2789 {
2790    GLuint CallDepth;            /**< Current recursion calling depth */
2791
2792    struct gl_display_list *CurrentList; /**< List currently being compiled */
2793    union gl_dlist_node *CurrentBlock; /**< Pointer to current block of nodes */
2794    GLuint CurrentPos;           /**< Index into current block of nodes */
2795
2796    GLvertexformat ListVtxfmt;
2797
2798    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2799    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2800
2801    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2802    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2803
2804    GLubyte ActiveIndex;
2805    GLfloat CurrentIndex;
2806
2807    GLubyte ActiveEdgeFlag;
2808    GLboolean CurrentEdgeFlag;
2809
2810    struct {
2811       /* State known to have been set by the currently-compiling display
2812        * list.  Used to eliminate some redundant state changes.
2813        */
2814       GLenum ShadeModel;
2815    } Current;
2816 };
2817
2818
2819 /**
2820  * Mesa rendering context.
2821  *
2822  * This is the central context data structure for Mesa.  Almost all
2823  * OpenGL state is contained in this structure.
2824  * Think of this as a base class from which device drivers will derive
2825  * sub classes.
2826  *
2827  * The GLcontext typedef names this structure.
2828  */
2829 struct __GLcontextRec
2830 {
2831    /** State possibly shared with other contexts in the address space */
2832    struct gl_shared_state *Shared;
2833
2834    /** \name API function pointer tables */
2835    /*@{*/
2836    struct _glapi_table *Save;   /**< Display list save functions */
2837    struct _glapi_table *Exec;   /**< Execute functions */
2838    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2839    /*@}*/
2840
2841    GLvisual Visual;
2842    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2843    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2844    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2845    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2846
2847    /**
2848     * Device driver function pointer table
2849     */
2850    struct dd_function_table Driver;
2851
2852    void *DriverCtx;     /**< Points to device driver context/state */
2853
2854    /** Core/Driver constants */
2855    struct gl_constants Const;
2856
2857    /** \name The various 4x4 matrix stacks */
2858    /*@{*/
2859    struct gl_matrix_stack ModelviewMatrixStack;
2860    struct gl_matrix_stack ProjectionMatrixStack;
2861    struct gl_matrix_stack ColorMatrixStack;
2862    struct gl_matrix_stack TextureMatrixStack[MAX_TEXTURE_UNITS];
2863    struct gl_matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2864    struct gl_matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2865    /*@}*/
2866
2867    /** Combined modelview and projection matrix */
2868    GLmatrix _ModelProjectMatrix;
2869
2870    /** \name Display lists */
2871    struct gl_dlist_state ListState;
2872
2873    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2874    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2875
2876    /** Extension information */
2877    struct gl_extensions Extensions;
2878
2879    /** \name State attribute stack (for glPush/PopAttrib) */
2880    /*@{*/
2881    GLuint AttribStackDepth;
2882    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2883    /*@}*/
2884
2885    /** \name Renderer attribute groups
2886     *
2887     * We define a struct for each attribute group to make pushing and popping
2888     * attributes easy.  Also it's a good organization.
2889     */
2890    /*@{*/
2891    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
2892    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
2893    struct gl_current_attrib     Current;        /**< Current attributes */
2894    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2895    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2896    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2897    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2898    struct gl_light_attrib       Light;          /**< Light attributes */
2899    struct gl_line_attrib        Line;           /**< Line attributes */
2900    struct gl_list_attrib        List;           /**< List attributes */
2901    struct gl_multisample_attrib Multisample;
2902    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2903    struct gl_point_attrib       Point;          /**< Point attributes */
2904    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2905    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2906    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2907    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2908    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2909    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2910    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2911    /*@}*/
2912
2913    /** \name Client attribute stack */
2914    /*@{*/
2915    GLuint ClientAttribStackDepth;
2916    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2917    /*@}*/
2918
2919    /** \name Client attribute groups */
2920    /*@{*/
2921    struct gl_array_attrib       Array;  /**< Vertex arrays */
2922    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2923    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2924    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2925    /*@}*/
2926
2927    /** \name Other assorted state (not pushed/popped on attribute stack) */
2928    /*@{*/
2929    struct gl_pixelmaps          PixelMaps;
2930    struct gl_histogram_attrib   Histogram;
2931    struct gl_minmax_attrib      MinMax;
2932    struct gl_convolution_attrib Convolution1D;
2933    struct gl_convolution_attrib Convolution2D;
2934    struct gl_convolution_attrib Separable2D;
2935
2936    struct gl_evaluators EvalMap;   /**< All evaluators */
2937    struct gl_feedback   Feedback;  /**< Feedback */
2938    struct gl_selection  Select;    /**< Selection */
2939
2940    struct gl_color_table ColorTable[COLORTABLE_MAX];
2941    struct gl_color_table ProxyColorTable[COLORTABLE_MAX];
2942
2943    struct gl_program_state Program;  /**< general program state */
2944    struct gl_vertex_program_state VertexProgram;
2945    struct gl_fragment_program_state FragmentProgram;
2946    struct gl_ati_fragment_shader_state ATIFragmentShader;
2947
2948    struct gl_shader_state Shader; /**< GLSL shader object state */
2949
2950    struct gl_query_state Query;  /**< occlusion, timer queries */
2951    /*@}*/
2952
2953 #if FEATURE_EXT_framebuffer_object
2954    struct gl_renderbuffer *CurrentRenderbuffer;
2955 #endif
2956
2957    GLenum ErrorValue;        /**< Last error code */
2958
2959    /**
2960     * Recognize and silence repeated error debug messages in buggy apps.
2961     */
2962    const char *ErrorDebugFmtString;
2963    GLuint ErrorDebugCount;
2964
2965    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2966    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
2967
2968    GLboolean ViewportInitialized;  /**< has viewport size been initialized? */
2969
2970    GLbitfield varying_vp_inputs;  /**< mask of VERT_BIT_* flags */
2971
2972    /** \name Derived state */
2973    /*@{*/
2974    /** Bitwise-or of DD_* flags.  Note that this bitfield may be used before
2975     * state validation so they need to always be current.
2976     */
2977    GLbitfield _TriangleCaps;
2978    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2979    GLfloat _EyeZDir[3];
2980    GLfloat _ModelViewInvScale;
2981    GLboolean _NeedEyeCoords;
2982    GLboolean _ForceEyeCoords;
2983
2984    GLuint TextureStateTimestamp; /**< detect changes to shared state */
2985
2986    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2987    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2988    /**@}*/
2989
2990    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2991
2992    /** \name For debugging/development only */
2993    /*@{*/
2994    GLboolean FirstTimeCurrent;
2995    /*@}*/
2996
2997    /** Dither disable via MESA_NO_DITHER env var */
2998    GLboolean NoDither;
2999
3000    /** software compression/decompression supported or not */
3001    GLboolean Mesa_DXTn;
3002
3003    /**
3004     * Use dp4 (rather than mul/mad) instructions for position
3005     * transformation?
3006     */
3007    GLboolean mvp_with_dp4;
3008
3009    /** Core tnl module support */
3010    struct gl_tnl_module TnlModule;
3011
3012    /**
3013     * \name Hooks for module contexts.
3014     *
3015     * These will eventually live in the driver or elsewhere.
3016     */
3017    /*@{*/
3018    void *swrast_context;
3019    void *swsetup_context;
3020    void *swtnl_context;
3021    void *swtnl_im;
3022    struct st_context *st;
3023    void *aelt_context;
3024    /*@}*/
3025 };
3026
3027
3028 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
3029 extern const char *_mesa_prim_name[GL_POLYGON+4];
3030
3031
3032 #ifdef DEBUG
3033 extern int MESA_VERBOSE;
3034 extern int MESA_DEBUG_FLAGS;
3035 # define MESA_FUNCTION __FUNCTION__
3036 #else
3037 # define MESA_VERBOSE 0
3038 # define MESA_DEBUG_FLAGS 0
3039 # define MESA_FUNCTION "a function"
3040 # ifndef NDEBUG
3041 #  define NDEBUG
3042 # endif
3043 #endif
3044
3045
3046 enum _verbose
3047 {
3048    VERBOSE_VARRAY               = 0x0001,
3049    VERBOSE_TEXTURE              = 0x0002,
3050    VERBOSE_IMMEDIATE            = 0x0004,
3051    VERBOSE_PIPELINE             = 0x0008,
3052    VERBOSE_DRIVER               = 0x0010,
3053    VERBOSE_STATE                = 0x0020,
3054    VERBOSE_API                  = 0x0040,
3055    VERBOSE_DISPLAY_LIST         = 0x0100,
3056    VERBOSE_LIGHTING             = 0x0200,
3057    VERBOSE_PRIMS                = 0x0400,
3058    VERBOSE_VERTS                = 0x0800,
3059    VERBOSE_DISASSEM             = 0x1000,
3060 };
3061
3062
3063 enum _debug
3064 {
3065    DEBUG_ALWAYS_FLUSH           = 0x1
3066 };
3067
3068
3069
3070 #endif /* MTYPES_H */