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 EyeDirection[4];     /**< spotlight dir 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 _NormDirection[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    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1300    GLenum WrapS;                /**< S-axis texture image wrap mode */
1301    GLenum WrapT;                /**< T-axis texture image wrap mode */
1302    GLenum WrapR;                /**< R-axis texture image wrap mode */
1303    GLenum MinFilter;            /**< minification filter */
1304    GLenum MagFilter;            /**< magnification filter */
1305    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1306    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1307    GLfloat LodBias;             /**< OpenGL 1.4 */
1308    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1309    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1310    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1311    GLenum CompareMode;          /**< GL_ARB_shadow */
1312    GLenum CompareFunc;          /**< GL_ARB_shadow */
1313    GLfloat CompareFailValue;    /**< GL_ARB_shadow_ambient */
1314    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1315    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1316    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1317    GLint CropRect[4];           /**< GL_OES_draw_texture */
1318    GLenum Swizzle[4];           /**< GL_EXT_texture_swizzle */
1319    GLuint _Swizzle;             /**< same as Swizzle, but SWIZZLE_* format */
1320    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1321    GLboolean _Complete;         /**< Is texture object complete? */
1322    GLboolean _RenderToTexture;  /**< Any rendering to this texture? */
1323
1324    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1325    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1326
1327    /** GL_EXT_paletted_texture */
1328    struct gl_color_table Palette;
1329
1330    /**
1331     * \name For device driver.
1332     * Note: instead of attaching driver data to this pointer, it's preferable
1333     * to instead use this struct as a base class for your own texture object
1334     * class.  Driver->NewTextureObject() can be used to implement the
1335     * allocation.
1336     */
1337    void *DriverData;    /**< Arbitrary device driver data */
1338 };
1339
1340
1341 /**
1342  * Texture combine environment state.
1343  * Up to four combiner sources are possible with GL_NV_texture_env_combine4.
1344  */
1345 struct gl_tex_env_combine_state
1346 {
1347    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1348    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1349    GLenum SourceRGB[4];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1350    GLenum SourceA[4];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1351    GLenum OperandRGB[4]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1352    GLenum OperandA[4];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1353    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1354    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1355    GLuint _NumArgsRGB;   /**< Number of inputs used for the RGB combiner */
1356    GLuint _NumArgsA;     /**< Number of inputs used for the A combiner */
1357 };
1358
1359
1360 /**
1361  * Texture coord generation state.
1362  */
1363 struct gl_texgen
1364 {
1365    GLenum Mode;         /**< GL_EYE_LINEAR, GL_SPHERE_MAP, etc */
1366    GLbitfield _ModeBit; /**< TEXGEN_x bit corresponding to Mode */
1367    GLfloat ObjectPlane[4];
1368    GLfloat EyePlane[4];
1369 };
1370
1371
1372 /**
1373  * Texture unit state.  Contains enable flags, texture environment/function/
1374  * combiners, texgen state, pointers to current texture objects and
1375  * post-filter color tables.
1376  */
1377 struct gl_texture_unit
1378 {
1379    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1380    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1381
1382    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1383    GLfloat EnvColor[4];
1384
1385    struct gl_texgen GenS;
1386    struct gl_texgen GenT;
1387    struct gl_texgen GenR;
1388    struct gl_texgen GenQ;
1389    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1390    GLbitfield _GenFlags;        /**< Bitwise-OR of Gen[STRQ]._ModeBit */
1391
1392    GLfloat LodBias;             /**< for biasing mipmap levels */
1393    GLenum BumpTarget;
1394    GLfloat RotMatrix[4]; /* 2x2 matrix */
1395
1396    /**
1397     * \name GL_EXT_texture_env_combine
1398     */
1399    struct gl_tex_env_combine_state Combine;
1400
1401    /**
1402     * Derived state based on \c EnvMode and the \c BaseFormat of the
1403     * currently enabled texture.
1404     */
1405    struct gl_tex_env_combine_state _EnvMode;
1406
1407    /**
1408     * Currently enabled combiner state.  This will point to either
1409     * \c Combine or \c _EnvMode.
1410     */
1411    struct gl_tex_env_combine_state *_CurrentCombine;
1412
1413    /** Current texture object pointers */
1414    struct gl_texture_object *CurrentTex[NUM_TEXTURE_TARGETS];
1415
1416    /** Points to highest priority, complete and enabled texture object */
1417    struct gl_texture_object *_Current;
1418
1419    /** GL_SGI_texture_color_table */
1420    /*@{*/
1421    struct gl_color_table ColorTable;
1422    struct gl_color_table ProxyColorTable;
1423    GLboolean ColorTableEnabled;
1424    /*@}*/
1425 };
1426
1427
1428 /**
1429  * Texture attribute group (GL_TEXTURE_BIT).
1430  */
1431 struct gl_texture_attrib
1432 {
1433    GLuint CurrentUnit;   /**< GL_ACTIVE_TEXTURE */
1434    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1435
1436    struct gl_texture_object *ProxyTex[NUM_TEXTURE_TARGETS];
1437
1438    /** GL_EXT_shared_texture_palette */
1439    GLboolean SharedPalette;
1440    struct gl_color_table Palette;
1441
1442    /** Texture units/samplers used by vertex or fragment texturing */
1443    GLbitfield _EnabledUnits;
1444
1445    /** Texture coord units/sets used for fragment texturing */
1446    GLbitfield _EnabledCoordUnits;
1447
1448    /** Texture coord units that have texgen enabled */
1449    GLbitfield _TexGenEnabled;
1450
1451    /** Texture coord units that have non-identity matrices */
1452    GLbitfield _TexMatEnabled;
1453
1454    /** Bitwise-OR of all Texture.Unit[i]._GenFlags */
1455    GLbitfield _GenFlags;
1456 };
1457
1458
1459 /**
1460  * Transformation attribute group (GL_TRANSFORM_BIT).
1461  */
1462 struct gl_transform_attrib
1463 {
1464    GLenum MatrixMode;                           /**< Matrix mode */
1465    GLfloat EyeUserPlane[MAX_CLIP_PLANES][4];    /**< User clip planes */
1466    GLfloat _ClipUserPlane[MAX_CLIP_PLANES][4];  /**< derived */
1467    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
1468    GLboolean Normalize;                         /**< Normalize all normals? */
1469    GLboolean RescaleNormals;                    /**< GL_EXT_rescale_normal */
1470    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
1471
1472    GLboolean CullVertexFlag;    /**< True if GL_CULL_VERTEX_EXT is enabled */
1473    GLfloat CullEyePos[4];
1474    GLfloat CullObjPos[4];
1475 };
1476
1477
1478 /**
1479  * Viewport attribute group (GL_VIEWPORT_BIT).
1480  */
1481 struct gl_viewport_attrib
1482 {
1483    GLint X, Y;                  /**< position */
1484    GLsizei Width, Height;       /**< size */
1485    GLfloat Near, Far;           /**< Depth buffer range */
1486    GLmatrix _WindowMap;         /**< Mapping transformation as a matrix. */
1487 };
1488
1489
1490 /**
1491  * GL_ARB_vertex/pixel_buffer_object buffer object
1492  */
1493 struct gl_buffer_object
1494 {
1495    GLint RefCount;
1496    GLuint Name;
1497    GLenum Usage;
1498    GLenum Access;
1499    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1500    GLintptr Offset;          /**< mapped offset */
1501    GLsizeiptr Length;        /**< mapped length */
1502    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1503    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1504    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1505 };
1506
1507
1508 /**
1509  * Client pixel packing/unpacking attributes
1510  */
1511 struct gl_pixelstore_attrib
1512 {
1513    GLint Alignment;
1514    GLint RowLength;
1515    GLint SkipPixels;
1516    GLint SkipRows;
1517    GLint ImageHeight;
1518    GLint SkipImages;
1519    GLboolean SwapBytes;
1520    GLboolean LsbFirst;
1521    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1522    GLboolean Invert;        /**< GL_MESA_pack_invert */
1523    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1524 };
1525
1526
1527 /**
1528  * Client vertex array attributes
1529  */
1530 struct gl_client_array
1531 {
1532    GLint Size;                  /**< components per element (1,2,3,4) */
1533    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1534    GLenum Format;               /**< default: GL_RGBA, but may be GL_BGRA */
1535    GLsizei Stride;              /**< user-specified stride */
1536    GLsizei StrideB;             /**< actual stride in bytes */
1537    const GLubyte *Ptr;          /**< Points to array data */
1538    GLboolean Enabled;           /**< Enabled flag is a boolean */
1539    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1540
1541    /**< GL_ARB_vertex_buffer_object */
1542    struct gl_buffer_object *BufferObj;
1543    GLuint _MaxElement;
1544 };
1545
1546
1547 /**
1548  * Collection of vertex arrays.  Defined by the GL_APPLE_vertex_array_object
1549  * extension, but a nice encapsulation in any case.
1550  */
1551 struct gl_array_object
1552 {
1553    /** Name of the array object as received from glGenVertexArrayAPPLE. */
1554    GLuint Name;
1555
1556    /** Conventional vertex arrays */
1557    /*@{*/
1558    struct gl_client_array Vertex;
1559    struct gl_client_array Normal;
1560    struct gl_client_array Color;
1561    struct gl_client_array SecondaryColor;
1562    struct gl_client_array FogCoord;
1563    struct gl_client_array Index;
1564    struct gl_client_array EdgeFlag;
1565    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1566    struct gl_client_array PointSize;
1567    /*@}*/
1568
1569    /** Generic arrays for vertex programs/shaders */
1570    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];
1571
1572    /** Mask of _NEW_ARRAY_* values indicating which arrays are enabled */
1573    GLbitfield _Enabled;
1574 };
1575
1576
1577 /**
1578  * Vertex array state
1579  */
1580 struct gl_array_attrib
1581 {
1582    struct gl_array_object *ArrayObj;
1583    struct gl_array_object *DefaultArrayObj;
1584
1585    GLint ActiveTexture;         /**< Client Active Texture */
1586    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1587    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1588
1589    GLbitfield NewState;         /**< mask of _NEW_ARRAY_* values */
1590
1591 #if FEATURE_ARB_vertex_buffer_object
1592    struct gl_buffer_object *NullBufferObj;
1593    struct gl_buffer_object *ArrayBufferObj;
1594    struct gl_buffer_object *ElementArrayBufferObj;
1595 #endif
1596    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1597 };
1598
1599
1600 /**
1601  * Feedback buffer state
1602  */
1603 struct gl_feedback
1604 {
1605    GLenum Type;
1606    GLbitfield _Mask;    /**< FB_* bits */
1607    GLfloat *Buffer;
1608    GLuint BufferSize;
1609    GLuint Count;
1610 };
1611
1612
1613 /**
1614  * Selection buffer state
1615  */
1616 struct gl_selection
1617 {
1618    GLuint *Buffer;      /**< selection buffer */
1619    GLuint BufferSize;   /**< size of the selection buffer */
1620    GLuint BufferCount;  /**< number of values in the selection buffer */
1621    GLuint Hits;         /**< number of records in the selection buffer */
1622    GLuint NameStackDepth; /**< name stack depth */
1623    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1624    GLboolean HitFlag;   /**< hit flag */
1625    GLfloat HitMinZ;     /**< minimum hit depth */
1626    GLfloat HitMaxZ;     /**< maximum hit depth */
1627 };
1628
1629
1630 /**
1631  * 1-D Evaluator control points
1632  */
1633 struct gl_1d_map
1634 {
1635    GLuint Order;        /**< Number of control points */
1636    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1637    GLfloat *Points;     /**< Points to contiguous control points */
1638 };
1639
1640
1641 /**
1642  * 2-D Evaluator control points
1643  */
1644 struct gl_2d_map
1645 {
1646    GLuint Uorder;               /**< Number of control points in U dimension */
1647    GLuint Vorder;               /**< Number of control points in V dimension */
1648    GLfloat u1, u2, du;
1649    GLfloat v1, v2, dv;
1650    GLfloat *Points;             /**< Points to contiguous control points */
1651 };
1652
1653
1654 /**
1655  * All evaluator control point state
1656  */
1657 struct gl_evaluators
1658 {
1659    /**
1660     * \name 1-D maps
1661     */
1662    /*@{*/
1663    struct gl_1d_map Map1Vertex3;
1664    struct gl_1d_map Map1Vertex4;
1665    struct gl_1d_map Map1Index;
1666    struct gl_1d_map Map1Color4;
1667    struct gl_1d_map Map1Normal;
1668    struct gl_1d_map Map1Texture1;
1669    struct gl_1d_map Map1Texture2;
1670    struct gl_1d_map Map1Texture3;
1671    struct gl_1d_map Map1Texture4;
1672    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1673    /*@}*/
1674
1675    /**
1676     * \name 2-D maps
1677     */
1678    /*@{*/
1679    struct gl_2d_map Map2Vertex3;
1680    struct gl_2d_map Map2Vertex4;
1681    struct gl_2d_map Map2Index;
1682    struct gl_2d_map Map2Color4;
1683    struct gl_2d_map Map2Normal;
1684    struct gl_2d_map Map2Texture1;
1685    struct gl_2d_map Map2Texture2;
1686    struct gl_2d_map Map2Texture3;
1687    struct gl_2d_map Map2Texture4;
1688    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1689    /*@}*/
1690 };
1691
1692
1693 /**
1694  * Names of the various vertex/fragment program register files, etc.
1695  *
1696  * NOTE: first four tokens must fit into 2 bits (see t_vb_arbprogram.c)
1697  * All values should fit in a 4-bit field.
1698  *
1699  * NOTE: PROGRAM_ENV_PARAM, PROGRAM_STATE_VAR, PROGRAM_NAMED_PARAM,
1700  * PROGRAM_CONSTANT, and PROGRAM_UNIFORM can all be considered to
1701  * be "uniform" variables since they can only be set outside glBegin/End.
1702  * They're also all stored in the same Parameters array.
1703  */
1704 typedef enum
1705 {
1706    PROGRAM_TEMPORARY,   /**< machine->Temporary[] */
1707    PROGRAM_INPUT,       /**< machine->Inputs[] */
1708    PROGRAM_OUTPUT,      /**< machine->Outputs[] */
1709    PROGRAM_VARYING,     /**< machine->Inputs[]/Outputs[] */
1710    PROGRAM_LOCAL_PARAM, /**< gl_program->LocalParams[] */
1711    PROGRAM_ENV_PARAM,   /**< gl_program->Parameters[] */
1712    PROGRAM_STATE_VAR,   /**< gl_program->Parameters[] */
1713    PROGRAM_NAMED_PARAM, /**< gl_program->Parameters[] */
1714    PROGRAM_CONSTANT,    /**< gl_program->Parameters[] */
1715    PROGRAM_UNIFORM,     /**< gl_program->Parameters[] */
1716    PROGRAM_WRITE_ONLY,  /**< A dummy, write-only register */
1717    PROGRAM_ADDRESS,     /**< machine->AddressReg */
1718    PROGRAM_SAMPLER,     /**< for shader samplers, compile-time only */
1719    PROGRAM_UNDEFINED,   /**< Invalid/TBD value */
1720    PROGRAM_FILE_MAX
1721 } gl_register_file;
1722
1723
1724 /** Vertex and fragment instructions */
1725 struct prog_instruction;
1726 struct gl_program_parameter_list;
1727 struct gl_uniform_list;
1728
1729
1730 /**
1731  * Base class for any kind of program object
1732  */
1733 struct gl_program
1734 {
1735    GLuint Id;
1736    GLubyte *String;  /**< Null-terminated program text */
1737    GLint RefCount;
1738    GLenum Target;    /**< GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_FRAGMENT_PROGRAM_NV */
1739    GLenum Format;    /**< String encoding format */
1740    GLboolean Resident;
1741
1742    struct prog_instruction *Instructions;
1743
1744    GLbitfield InputsRead;     /**< Bitmask of which input regs are read */
1745    GLbitfield OutputsWritten; /**< Bitmask of which output regs are written to */
1746    GLbitfield InputFlags[MAX_PROGRAM_INPUTS];   /**< PROG_PARAM_BIT_x flags */
1747    GLbitfield OutputFlags[MAX_PROGRAM_OUTPUTS]; /**< PROG_PARAM_BIT_x flags */
1748    GLbitfield TexturesUsed[MAX_TEXTURE_UNITS];  /**< TEXTURE_x_BIT bitmask */
1749    GLbitfield SamplersUsed;   /**< Bitfield of which samplers are used */
1750    GLbitfield ShadowSamplers; /**< Texture units used for shadow sampling. */
1751
1752
1753    /** Named parameters, constants, etc. from program text */
1754    struct gl_program_parameter_list *Parameters;
1755    /** Numbered local parameters */
1756    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1757
1758    /** Vertex/fragment shader varying vars */
1759    struct gl_program_parameter_list *Varying;
1760    /** Vertex program user-defined attributes */
1761    struct gl_program_parameter_list *Attributes;
1762
1763    /** Map from sampler unit to texture unit (set by glUniform1i()) */
1764    GLubyte SamplerUnits[MAX_SAMPLERS];
1765    /** Which texture target is being sampled (TEXTURE_1D/2D/3D/etc_INDEX) */
1766    GLubyte SamplerTargets[MAX_SAMPLERS];
1767
1768    /** Logical counts */
1769    /*@{*/
1770    GLuint NumInstructions;
1771    GLuint NumTemporaries;
1772    GLuint NumParameters;
1773    GLuint NumAttributes;
1774    GLuint NumAddressRegs;
1775    GLuint NumAluInstructions;
1776    GLuint NumTexInstructions;
1777    GLuint NumTexIndirections;
1778    /*@}*/
1779    /** Native, actual h/w counts */
1780    /*@{*/
1781    GLuint NumNativeInstructions;
1782    GLuint NumNativeTemporaries;
1783    GLuint NumNativeParameters;
1784    GLuint NumNativeAttributes;
1785    GLuint NumNativeAddressRegs;
1786    GLuint NumNativeAluInstructions;
1787    GLuint NumNativeTexInstructions;
1788    GLuint NumNativeTexIndirections;
1789    /*@}*/
1790 };
1791
1792
1793 /** Vertex program object */
1794 struct gl_vertex_program
1795 {
1796    struct gl_program Base;   /**< base class */
1797    GLboolean IsNVProgram;    /**< is this a GL_NV_vertex_program program? */
1798    GLboolean IsPositionInvariant;
1799    void *TnlData;               /**< should probably use Base.DriverData */
1800 };
1801
1802
1803 /** Fragment program object */
1804 struct gl_fragment_program
1805 {
1806    struct gl_program Base;   /**< base class */
1807    GLenum FogOption;
1808    GLboolean UsesKill;          /**< shader uses KIL instruction */
1809    GLboolean UsesPointCoord;    /**< shader uses gl_PointCoord */
1810    GLboolean UsesFrontFacing;   /**< shader used gl_FrontFacing */
1811    GLboolean UsesFogFragCoord;  /**< shader used gl_FogFragCoord */
1812 };
1813
1814
1815 /**
1816  * State common to vertex and fragment programs.
1817  */
1818 struct gl_program_state
1819 {
1820    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_ARB/NV */
1821    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_ARB/NV */
1822 };
1823
1824
1825 /**
1826  * Context state for vertex programs.
1827  */
1828 struct gl_vertex_program_state
1829 {
1830    GLboolean Enabled;            /**< User-set GL_VERTEX_PROGRAM_ARB/NV flag */
1831    GLboolean _Enabled;           /**< Enabled and _valid_ user program? */
1832    GLboolean PointSizeEnabled;   /**< GL_VERTEX_PROGRAM_POINT_SIZE_ARB/NV */
1833    GLboolean TwoSideEnabled;     /**< GL_VERTEX_PROGRAM_TWO_SIDE_ARB/NV */
1834    struct gl_vertex_program *Current;  /**< User-bound vertex program */
1835
1836    /** Currently enabled and valid vertex program (including internal
1837     * programs, user-defined vertex programs and GLSL vertex shaders).
1838     * This is the program we must use when rendering.
1839     */
1840    struct gl_vertex_program *_Current;
1841
1842    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1843
1844    /* For GL_NV_vertex_program only: */
1845    GLenum TrackMatrix[MAX_PROGRAM_ENV_PARAMS / 4];
1846    GLenum TrackMatrixTransform[MAX_PROGRAM_ENV_PARAMS / 4];
1847
1848    /** Should fixed-function T&L be implemented with a vertex prog? */
1849    GLboolean _MaintainTnlProgram;
1850
1851    /** Program to emulate fixed-function T&L (see above) */
1852    struct gl_vertex_program *_TnlProgram;
1853
1854    /** Cache of fixed-function programs */
1855    struct gl_program_cache *Cache;
1856
1857    GLboolean _Overriden;
1858 };
1859
1860
1861 /**
1862  * Context state for fragment programs.
1863  */
1864 struct gl_fragment_program_state
1865 {
1866    GLboolean Enabled;     /**< User-set fragment program enable flag */
1867    GLboolean _Enabled;    /**< Enabled and _valid_ user program? */
1868    struct gl_fragment_program *Current;  /**< User-bound fragment program */
1869
1870    /** Currently enabled and valid fragment program (including internal
1871     * programs, user-defined fragment programs and GLSL fragment shaders).
1872     * This is the program we must use when rendering.
1873     */
1874    struct gl_fragment_program *_Current;
1875
1876    GLfloat Parameters[MAX_PROGRAM_ENV_PARAMS][4]; /**< Env params */
1877
1878    /** Should fixed-function texturing be implemented with a fragment prog? */
1879    GLboolean _MaintainTexEnvProgram;
1880
1881    /** Program to emulate fixed-function texture env/combine (see above) */
1882    struct gl_fragment_program *_TexEnvProgram;
1883
1884    /** Cache of fixed-function programs */
1885    struct gl_program_cache *Cache;
1886 };
1887
1888
1889 /**
1890  * ATI_fragment_shader runtime state
1891  */
1892 #define ATI_FS_INPUT_PRIMARY 0
1893 #define ATI_FS_INPUT_SECONDARY 1
1894
1895 struct atifs_instruction;
1896 struct atifs_setupinst;
1897
1898 /**
1899  * ATI fragment shader
1900  */
1901 struct ati_fragment_shader
1902 {
1903    GLuint Id;
1904    GLint RefCount;
1905    struct atifs_instruction *Instructions[2];
1906    struct atifs_setupinst *SetupInst[2];
1907    GLfloat Constants[8][4];
1908    GLbitfield LocalConstDef;  /** Indicates which constants have been set */
1909    GLubyte numArithInstr[2];
1910    GLubyte regsAssigned[2];
1911    GLubyte NumPasses;         /** 1 or 2 */
1912    GLubyte cur_pass;
1913    GLubyte last_optype;
1914    GLboolean interpinp1;
1915    GLboolean isValid;
1916    GLuint swizzlerq;
1917 };
1918
1919 /**
1920  * Context state for GL_ATI_fragment_shader
1921  */
1922 struct gl_ati_fragment_shader_state
1923 {
1924    GLboolean Enabled;
1925    GLboolean _Enabled;                      /** enabled and valid shader? */
1926    GLboolean Compiling;
1927    GLfloat GlobalConstants[8][4];
1928    struct ati_fragment_shader *Current;
1929 };
1930
1931
1932 /**
1933  * Occlusion/timer query object.
1934  */
1935 struct gl_query_object
1936 {
1937    GLenum Target;      /**< The query target, when active */
1938    GLuint Id;          /**< hash table ID/name */
1939    GLuint64EXT Result; /**< the counter */
1940    GLboolean Active;   /**< inside Begin/EndQuery */
1941    GLboolean Ready;    /**< result is ready? */
1942 };
1943
1944
1945 /**
1946  * Context state for query objects.
1947  */
1948 struct gl_query_state
1949 {
1950    struct _mesa_HashTable *QueryObjects;
1951    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
1952    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
1953 };
1954
1955
1956 /** Set by #pragma directives */
1957 struct gl_sl_pragmas
1958 {
1959    GLboolean Optimize;  /**< defaults on */
1960    GLboolean Debug;     /**< defaults off */
1961 };
1962
1963
1964 /**
1965  * A GLSL vertex or fragment shader object.
1966  */
1967 struct gl_shader
1968 {
1969    GLenum Type;  /**< GL_FRAGMENT_SHADER || GL_VERTEX_SHADER (first field!) */
1970    GLuint Name;  /**< AKA the handle */
1971    GLint RefCount;  /**< Reference count */
1972    GLboolean DeletePending;
1973    GLboolean CompileStatus;
1974    GLboolean Main;  /**< shader defines main() */
1975    const GLchar *Source;  /**< Source code string */
1976    struct gl_program *Program;  /**< Post-compile assembly code */
1977    GLchar *InfoLog;
1978    struct gl_sl_pragmas Pragmas;
1979 };
1980
1981
1982 /**
1983  * A GLSL program object.
1984  * Basically a linked collection of vertex and fragment shaders.
1985  */
1986 struct gl_shader_program
1987 {
1988    GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
1989    GLuint Name;  /**< aka handle or ID */
1990    GLint RefCount;  /**< Reference count */
1991    GLboolean DeletePending;
1992
1993    GLuint NumShaders;          /**< number of attached shaders */
1994    struct gl_shader **Shaders; /**< List of attached the shaders */
1995
1996    /** User-defined attribute bindings (glBindAttribLocation) */
1997    struct gl_program_parameter_list *Attributes;
1998
1999    /* post-link info: */
2000    struct gl_vertex_program *VertexProgram;     /**< Linked vertex program */
2001    struct gl_fragment_program *FragmentProgram; /**< Linked fragment prog */
2002    struct gl_uniform_list *Uniforms;
2003    struct gl_program_parameter_list *Varying;
2004    GLboolean LinkStatus;   /**< GL_LINK_STATUS */
2005    GLboolean Validated;
2006    GLchar *InfoLog;
2007 };
2008
2009
2010 #define GLSL_DUMP      0x1  /**< Dump shaders to stdout */
2011 #define GLSL_LOG       0x2  /**< Write shaders to files */
2012 #define GLSL_OPT       0x4  /**< Force optimizations (override pragmas) */
2013 #define GLSL_NO_OPT    0x8  /**< Force no optimizations (override pragmas) */
2014 #define GLSL_UNIFORMS 0x10  /**< Print glUniform calls */
2015
2016
2017 /**
2018  * Context state for GLSL vertex/fragment shaders.
2019  */
2020 struct gl_shader_state
2021 {
2022    struct gl_shader_program *CurrentProgram; /**< The user-bound program */
2023    /** Driver-selectable options: */
2024    GLboolean EmitHighLevelInstructions; /**< IF/ELSE/ENDIF vs. BRA, etc. */
2025    GLboolean EmitCondCodes;             /**< Use condition codes? */
2026    GLboolean EmitComments;              /**< Annotated instructions */
2027    void *MemPool;
2028    GLbitfield Flags;                    /**< Mask of GLSL_x flags */
2029 };
2030
2031
2032 /**
2033  * State which can be shared by multiple contexts:
2034  */
2035 struct gl_shared_state
2036 {
2037    _glthread_Mutex Mutex;                  /**< for thread safety */
2038    GLint RefCount;                         /**< Reference count */
2039    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
2040    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
2041
2042    /** Default texture objects (shared by all texture units) */
2043    struct gl_texture_object *DefaultTex[NUM_TEXTURE_TARGETS];
2044
2045    /**
2046     * \name Thread safety and statechange notification for texture
2047     * objects.
2048     *
2049     * \todo Improve the granularity of locking.
2050     */
2051    /*@{*/
2052    _glthread_Mutex TexMutex;            /**< texobj thread safety */
2053    GLuint TextureStateStamp;            /**< state notification for shared tex */
2054    /*@}*/
2055
2056
2057    /**
2058     * \name Vertex/fragment programs
2059     */
2060    /*@{*/
2061    struct _mesa_HashTable *Programs; /**< All vertex/fragment programs */
2062 #if FEATURE_ARB_vertex_program
2063    struct gl_vertex_program *DefaultVertexProgram;
2064 #endif
2065 #if FEATURE_ARB_fragment_program
2066    struct gl_fragment_program *DefaultFragmentProgram;
2067 #endif
2068    /*@}*/
2069
2070 #if FEATURE_ATI_fragment_shader
2071    struct _mesa_HashTable *ATIShaders;
2072    struct ati_fragment_shader *DefaultFragmentShader;
2073 #endif
2074
2075 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2076    struct _mesa_HashTable *BufferObjects;
2077 #endif
2078
2079 #if FEATURE_ARB_shader_objects
2080    /** Table of both gl_shader and gl_shader_program objects */
2081    struct _mesa_HashTable *ShaderObjects;
2082 #endif
2083
2084 #if FEATURE_EXT_framebuffer_object
2085    struct _mesa_HashTable *RenderBuffers;
2086    struct _mesa_HashTable *FrameBuffers;
2087 #endif
2088
2089    /** Objects associated with the GL_APPLE_vertex_array_object extension. */
2090    struct _mesa_HashTable *ArrayObjects;
2091
2092    void *DriverData;  /**< Device driver shared state */
2093 };
2094
2095
2096
2097
2098 /**
2099  * A renderbuffer stores colors or depth values or stencil values.
2100  * A framebuffer object will have a collection of these.
2101  * Data are read/written to the buffer with a handful of Get/Put functions.
2102  *
2103  * Instances of this object are allocated with the Driver's NewRenderbuffer
2104  * hook.  Drivers will likely wrap this class inside a driver-specific
2105  * class to simulate inheritance.
2106  */
2107 struct gl_renderbuffer
2108 {
2109 #define RB_MAGIC 0xaabbccdd
2110    int Magic; /** XXX TEMPORARY DEBUG INFO */
2111    _glthread_Mutex Mutex;                  /**< for thread safety */
2112    GLuint ClassID;        /**< Useful for drivers */
2113    GLuint Name;
2114    GLint RefCount;
2115    GLuint Width, Height;
2116    GLenum InternalFormat; /**< The user-specified format */
2117    GLenum _ActualFormat;  /**< The driver-chosen format */
2118    GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
2119                                GL_STENCIL_INDEX. */
2120    GLenum ColorEncoding; /**< GL_LINEAR or GL_SRGB */
2121    GLenum ComponentType; /**< GL_FLOAT, GL_INT, GL_UNSIGNED_INT,
2122                               GL_UNSIGNED_NORMALIZED or GL_INDEX */
2123    GLubyte RedBits;      /**< Bits of red per pixel */
2124    GLubyte GreenBits;
2125    GLubyte BlueBits;
2126    GLubyte AlphaBits;
2127    GLubyte IndexBits;
2128    GLubyte DepthBits;
2129    GLubyte StencilBits;
2130    GLubyte NumSamples;
2131
2132    GLenum DataType;      /**< Type of values passed to the Get/Put functions */
2133    GLvoid *Data;        /**< This may not be used by some kinds of RBs */
2134
2135    /* Used to wrap one renderbuffer around another: */
2136    struct gl_renderbuffer *Wrapped;
2137
2138    /* Delete this renderbuffer */
2139    void (*Delete)(struct gl_renderbuffer *rb);
2140
2141    /* Allocate new storage for this renderbuffer */
2142    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2143                              GLenum internalFormat,
2144                              GLuint width, GLuint height);
2145
2146    /* Lock/Unlock are called before/after calling the Get/Put functions.
2147     * Not sure this is the right place for these yet.
2148    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2149    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2150     */
2151
2152    /* Return a pointer to the element/pixel at (x,y).
2153     * Should return NULL if the buffer memory can't be directly addressed.
2154     */
2155    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2156                        GLint x, GLint y);
2157
2158    /* Get/Read a row of values.
2159     * The values will be of format _BaseFormat and type DataType.
2160     */
2161    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2162                   GLint x, GLint y, void *values);
2163
2164    /* Get/Read values at arbitrary locations.
2165     * The values will be of format _BaseFormat and type DataType.
2166     */
2167    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2168                      const GLint x[], const GLint y[], void *values);
2169
2170    /* Put/Write a row of values.
2171     * The values will be of format _BaseFormat and type DataType.
2172     */
2173    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2174                   GLint x, GLint y, const void *values, const GLubyte *mask);
2175
2176    /* Put/Write a row of RGB values.  This is a special-case routine that's
2177     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2178     * a common case for glDrawPixels and some triangle routines.
2179     * The values will be of format GL_RGB and type DataType.
2180     */
2181    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2182                     GLint x, GLint y, const void *values, const GLubyte *mask);
2183
2184
2185    /* Put/Write a row of identical values.
2186     * The values will be of format _BaseFormat and type DataType.
2187     */
2188    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2189                      GLint x, GLint y, const void *value, const GLubyte *mask);
2190
2191    /* Put/Write values at arbitrary locations.
2192     * The values will be of format _BaseFormat and type DataType.
2193     */
2194    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2195                      const GLint x[], const GLint y[], const void *values,
2196                      const GLubyte *mask);
2197    /* Put/Write identical values at arbitrary locations.
2198     * The values will be of format _BaseFormat and type DataType.
2199     */
2200    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2201                          GLuint count, const GLint x[], const GLint y[],
2202                          const void *value, const GLubyte *mask);
2203 };
2204
2205
2206 /**
2207  * A renderbuffer attachment points to either a texture object (and specifies
2208  * a mipmap level, cube face or 3D texture slice) or points to a renderbuffer.
2209  */
2210 struct gl_renderbuffer_attachment
2211 {
2212    GLenum Type;  /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
2213    GLboolean Complete;
2214
2215    /**
2216     * If \c Type is \c GL_RENDERBUFFER_EXT, this stores a pointer to the
2217     * application supplied renderbuffer object.
2218     */
2219    struct gl_renderbuffer *Renderbuffer;
2220
2221    /**
2222     * If \c Type is \c GL_TEXTURE, this stores a pointer to the application
2223     * supplied texture object.
2224     */
2225    struct gl_texture_object *Texture;
2226    GLuint TextureLevel; /**< Attached mipmap level. */
2227    GLuint CubeMapFace;  /**< 0 .. 5, for cube map textures. */
2228    GLuint Zoffset;      /**< Slice for 3D textures,  or layer for both 1D
2229                          * and 2D array textures */
2230 };
2231
2232
2233 /**
2234  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2235  * In C++ terms, think of this as a base class from which device drivers
2236  * will make derived classes.
2237  */
2238 struct gl_framebuffer
2239 {
2240    _glthread_Mutex Mutex;  /**< for thread safety */
2241    /**
2242     * If zero, this is a window system framebuffer.  If non-zero, this
2243     * is a FBO framebuffer; note that for some devices (i.e. those with
2244     * a natural pixel coordinate system for FBOs that differs from the
2245     * OpenGL/Mesa coordinate system), this means that the viewport,
2246     * polygon face orientation, and polygon stipple will have to be inverted.
2247     */
2248    GLuint Name;
2249
2250    GLint RefCount;
2251    GLboolean DeletePending;
2252
2253    /**
2254     * The framebuffer's visual. Immutable if this is a window system buffer.
2255     * Computed from attachments if user-made FBO.
2256     */
2257    GLvisual Visual;
2258
2259    GLboolean Initialized;
2260
2261    GLuint Width, Height;        /**< size of frame buffer in pixels */
2262
2263    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2264    /*@{*/
2265    GLint _Xmin, _Xmax;  /**< inclusive */
2266    GLint _Ymin, _Ymax;  /**< exclusive */
2267    /*@}*/
2268
2269    /** \name  Derived Z buffer stuff */
2270    /*@{*/
2271    GLuint _DepthMax;    /**< Max depth buffer value */
2272    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2273    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2274    /*@}*/
2275
2276    /** One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2277    GLenum _Status;
2278
2279    /** Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2280    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2281
2282    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2283     * attribute group and GL_PIXEL attribute group, respectively.
2284     */
2285    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2286    GLenum ColorReadBuffer;
2287
2288    /** Computed from ColorDraw/ReadBuffer above */
2289    GLuint _NumColorDrawBuffers;
2290    GLint _ColorDrawBufferIndexes[MAX_DRAW_BUFFERS]; /**< BUFFER_x or -1 */
2291    GLint _ColorReadBufferIndex; /* -1 = None */
2292    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS];
2293    struct gl_renderbuffer *_ColorReadBuffer;
2294
2295    /** The Actual depth/stencil buffers to use.  May be wrappers around the
2296     * depth/stencil buffers attached above. */
2297    struct gl_renderbuffer *_DepthBuffer;
2298    struct gl_renderbuffer *_StencilBuffer;
2299
2300    /** Delete this framebuffer */
2301    void (*Delete)(struct gl_framebuffer *fb);
2302 };
2303
2304
2305 /**
2306  * Limits for vertex and fragment programs.
2307  */
2308 struct gl_program_constants
2309 {
2310    /* logical limits */
2311    GLuint MaxInstructions;
2312    GLuint MaxAluInstructions; /* fragment programs only, for now */
2313    GLuint MaxTexInstructions; /* fragment programs only, for now */
2314    GLuint MaxTexIndirections; /* fragment programs only, for now */
2315    GLuint MaxAttribs;
2316    GLuint MaxTemps;
2317    GLuint MaxAddressRegs; /* vertex program only, for now */
2318    GLuint MaxParameters;
2319    GLuint MaxLocalParams;
2320    GLuint MaxEnvParams;
2321    /* native/hardware limits */
2322    GLuint MaxNativeInstructions;
2323    GLuint MaxNativeAluInstructions; /* fragment programs only, for now */
2324    GLuint MaxNativeTexInstructions; /* fragment programs only, for now */
2325    GLuint MaxNativeTexIndirections; /* fragment programs only, for now */
2326    GLuint MaxNativeAttribs;
2327    GLuint MaxNativeTemps;
2328    GLuint MaxNativeAddressRegs; /* vertex program only, for now */
2329    GLuint MaxNativeParameters;
2330    /* For shaders */
2331    GLuint MaxUniformComponents;
2332 };
2333
2334
2335 /**
2336  * Constants which may be overridden by device driver during context creation
2337  * but are never changed after that.
2338  */
2339 struct gl_constants
2340 {
2341    GLint MaxTextureLevels;      /**< Max mipmap levels. */
2342    GLint Max3DTextureLevels;    /**< Max mipmap levels for 3D textures */
2343    GLint MaxCubeTextureLevels;  /**< Max mipmap levels for cube textures */
2344    GLint MaxArrayTextureLayers; /**< Max layers in array textures */
2345    GLint MaxTextureRectSize;    /**< Max rectangle texture size, in pixes */
2346    GLuint MaxTextureCoordUnits;
2347    GLuint MaxTextureImageUnits;
2348    GLuint MaxVertexTextureImageUnits;
2349    GLuint MaxTextureUnits;           /**< = MIN(CoordUnits, ImageUnits) */
2350    GLfloat MaxTextureMaxAnisotropy;  /**< GL_EXT_texture_filter_anisotropic */
2351    GLfloat MaxTextureLodBias;        /**< GL_EXT_texture_lod_bias */
2352
2353    GLuint MaxArrayLockSize;
2354
2355    GLint SubPixelBits;
2356
2357    GLfloat MinPointSize, MaxPointSize;       /**< aliased */
2358    GLfloat MinPointSizeAA, MaxPointSizeAA;   /**< antialiased */
2359    GLfloat PointSizeGranularity;
2360    GLfloat MinLineWidth, MaxLineWidth;       /**< aliased */
2361    GLfloat MinLineWidthAA, MaxLineWidthAA;   /**< antialiased */
2362    GLfloat LineWidthGranularity;
2363
2364    GLuint MaxColorTableSize;
2365    GLuint MaxConvolutionWidth;
2366    GLuint MaxConvolutionHeight;
2367
2368    GLuint MaxClipPlanes;
2369    GLuint MaxLights;
2370    GLfloat MaxShininess;                     /**< GL_NV_light_max_exponent */
2371    GLfloat MaxSpotExponent;                  /**< GL_NV_light_max_exponent */
2372
2373    GLuint MaxViewportWidth, MaxViewportHeight;
2374
2375    struct gl_program_constants VertexProgram;   /**< GL_ARB_vertex_program */
2376    struct gl_program_constants FragmentProgram; /**< GL_ARB_fragment_program */
2377    GLuint MaxProgramMatrices;
2378    GLuint MaxProgramMatrixStackDepth;
2379
2380    /** vertex array / buffer object bounds checking */
2381    GLboolean CheckArrayBounds;
2382
2383    GLuint MaxDrawBuffers;    /**< GL_ARB_draw_buffers */
2384
2385    GLenum ColorReadFormat;   /**< GL_OES_read_format */
2386    GLenum ColorReadType;     /**< GL_OES_read_format */
2387
2388    GLuint MaxColorAttachments;   /**< GL_EXT_framebuffer_object */
2389    GLuint MaxRenderbufferSize;   /**< GL_EXT_framebuffer_object */
2390    GLuint MaxSamples;            /**< GL_ARB_framebuffer_object */
2391
2392    GLuint MaxVarying;  /**< Number of float[4] varying parameters */
2393
2394    GLbitfield SupportedBumpUnits; /**> units supporting GL_ATI_envmap_bumpmap as targets */
2395 };
2396
2397
2398 /**
2399  * Enable flag for each OpenGL extension.  Different device drivers will
2400  * enable different extensions at runtime.
2401  */
2402 struct gl_extensions
2403 {
2404    GLboolean dummy;  /* don't remove this! */
2405    GLboolean ARB_depth_texture;
2406    GLboolean ARB_draw_buffers;
2407    GLboolean ARB_fragment_program;
2408    GLboolean ARB_fragment_program_shadow;
2409    GLboolean ARB_fragment_shader;
2410    GLboolean ARB_framebuffer_object;
2411    GLboolean ARB_half_float_pixel;
2412    GLboolean ARB_imaging;
2413    GLboolean ARB_multisample;
2414    GLboolean ARB_multitexture;
2415    GLboolean ARB_occlusion_query;
2416    GLboolean ARB_point_sprite;
2417    GLboolean ARB_shader_objects;
2418    GLboolean ARB_shading_language_100;
2419    GLboolean ARB_shading_language_120;
2420    GLboolean ARB_shadow;
2421    GLboolean ARB_shadow_ambient; /* or GL_ARB_shadow_ambient */
2422    GLboolean ARB_texture_border_clamp;
2423    GLboolean ARB_texture_compression;
2424    GLboolean ARB_texture_cube_map;
2425    GLboolean ARB_texture_env_combine;
2426    GLboolean ARB_texture_env_crossbar;
2427    GLboolean ARB_texture_env_dot3;
2428    GLboolean ARB_texture_float;
2429    GLboolean ARB_texture_mirrored_repeat;
2430    GLboolean ARB_texture_non_power_of_two;
2431    GLboolean ARB_transpose_matrix;
2432    GLboolean ARB_vertex_buffer_object;
2433    GLboolean ARB_vertex_program;
2434    GLboolean ARB_vertex_shader;
2435    GLboolean ARB_window_pos;
2436    GLboolean EXT_abgr;
2437    GLboolean EXT_bgra;
2438    GLboolean EXT_blend_color;
2439    GLboolean EXT_blend_equation_separate;
2440    GLboolean EXT_blend_func_separate;
2441    GLboolean EXT_blend_logic_op;
2442    GLboolean EXT_blend_minmax;
2443    GLboolean EXT_blend_subtract;
2444    GLboolean EXT_clip_volume_hint;
2445    GLboolean EXT_cull_vertex;
2446    GLboolean EXT_convolution;
2447    GLboolean EXT_compiled_vertex_array;
2448    GLboolean EXT_copy_texture;
2449    GLboolean EXT_depth_bounds_test;
2450    GLboolean EXT_draw_range_elements;
2451    GLboolean EXT_framebuffer_object;
2452    GLboolean EXT_fog_coord;
2453    GLboolean EXT_framebuffer_blit;
2454    GLboolean EXT_gpu_program_parameters;
2455    GLboolean EXT_histogram;
2456    GLboolean EXT_multi_draw_arrays;
2457    GLboolean EXT_paletted_texture;
2458    GLboolean EXT_packed_depth_stencil;
2459    GLboolean EXT_packed_pixels;
2460    GLboolean EXT_pixel_buffer_object;
2461    GLboolean EXT_point_parameters;
2462    GLboolean EXT_polygon_offset;
2463    GLboolean EXT_rescale_normal;
2464    GLboolean EXT_shadow_funcs;
2465    GLboolean EXT_secondary_color;
2466    GLboolean EXT_separate_specular_color;
2467    GLboolean EXT_shared_texture_palette;
2468    GLboolean EXT_stencil_wrap;
2469    GLboolean EXT_stencil_two_side;
2470    GLboolean EXT_subtexture;
2471    GLboolean EXT_texture;
2472    GLboolean EXT_texture_object;
2473    GLboolean EXT_texture3D;
2474    GLboolean EXT_texture_compression_s3tc;
2475    GLboolean EXT_texture_env_add;
2476    GLboolean EXT_texture_env_combine;
2477    GLboolean EXT_texture_env_dot3;
2478    GLboolean EXT_texture_filter_anisotropic;
2479    GLboolean EXT_texture_lod_bias;
2480    GLboolean EXT_texture_mirror_clamp;
2481    GLboolean EXT_texture_sRGB;
2482    GLboolean EXT_texture_swizzle;
2483    GLboolean EXT_timer_query;
2484    GLboolean EXT_vertex_array;
2485    GLboolean EXT_vertex_array_bgra;
2486    GLboolean EXT_vertex_array_set;
2487    /* vendor extensions */
2488    GLboolean APPLE_client_storage;
2489    GLboolean APPLE_packed_pixels;
2490    GLboolean APPLE_vertex_array_object;
2491    GLboolean ATI_envmap_bumpmap;
2492    GLboolean ATI_texture_mirror_once;
2493    GLboolean ATI_texture_env_combine3;
2494    GLboolean ATI_fragment_shader;
2495    GLboolean ATI_separate_stencil;
2496    GLboolean IBM_rasterpos_clip;
2497    GLboolean IBM_multimode_draw_arrays;
2498    GLboolean MESA_pack_invert;
2499    GLboolean MESA_packed_depth_stencil;
2500    GLboolean MESA_resize_buffers;
2501    GLboolean MESA_ycbcr_texture;
2502    GLboolean MESA_texture_array;
2503    GLboolean NV_blend_square;
2504    GLboolean NV_fragment_program;
2505    GLboolean NV_light_max_exponent;
2506    GLboolean NV_point_sprite;
2507    GLboolean NV_texgen_reflection;
2508    GLboolean NV_texture_env_combine4;
2509    GLboolean NV_texture_rectangle;
2510    GLboolean NV_vertex_program;
2511    GLboolean NV_vertex_program1_1;
2512    GLboolean OES_read_format;
2513    GLboolean SGI_color_matrix;
2514    GLboolean SGI_color_table;
2515    GLboolean SGI_texture_color_table;
2516    GLboolean SGIS_generate_mipmap;
2517    GLboolean SGIS_texture_edge_clamp;
2518    GLboolean SGIS_texture_lod;
2519    GLboolean TDFX_texture_compression_FXT1;
2520    GLboolean S3_s3tc;
2521    /** The extension string */
2522    const GLubyte *String;
2523 };
2524
2525
2526 /**
2527  * A stack of matrices (projection, modelview, color, texture, etc).
2528  */
2529 struct gl_matrix_stack
2530 {
2531    GLmatrix *Top;      /**< points into Stack */
2532    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2533    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2534    GLuint MaxDepth;    /**< size of Stack[] array */
2535    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2536 };
2537
2538
2539 /**
2540  * \name Bits for image transfer operations
2541  * \sa __GLcontextRec::ImageTransferState.
2542  */
2543 /*@{*/
2544 #define IMAGE_SCALE_BIAS_BIT                      0x1
2545 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2546 #define IMAGE_MAP_COLOR_BIT                       0x4
2547 #define IMAGE_COLOR_TABLE_BIT                     0x8
2548 #define IMAGE_CONVOLUTION_BIT                     0x10
2549 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2550 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2551 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2552 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2553 #define IMAGE_HISTOGRAM_BIT                       0x200
2554 #define IMAGE_MIN_MAX_BIT                         0x400
2555 #define IMAGE_CLAMP_BIT                           0x800
2556
2557
2558 /** Pixel Transfer ops up to convolution */
2559 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2560                                     IMAGE_SHIFT_OFFSET_BIT |   \
2561                                     IMAGE_MAP_COLOR_BIT |      \
2562                                     IMAGE_COLOR_TABLE_BIT)
2563
2564 /** Pixel transfer ops after convolution */
2565 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2566                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2567                                      IMAGE_COLOR_MATRIX_BIT |                 \
2568                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2569                                      IMAGE_HISTOGRAM_BIT |                    \
2570                                      IMAGE_MIN_MAX_BIT)
2571 /*@}*/
2572
2573
2574 /**
2575  * \name Bits to indicate what state has changed.
2576  *
2577  * 4 unused flags.
2578  */
2579 /*@{*/
2580 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2581 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2582 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2583 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2584 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2585 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2586 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2587 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2588 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2589 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2590 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2591 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2592 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2593 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2594 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2595 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2596 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2597 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2598 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2599 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2600 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2601 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2602 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2603 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2604 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2605 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2606 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2607 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2608 #define _NEW_CURRENT_ATTRIB     0x10000000  /**< __GLcontextRec::Current */
2609 #define _NEW_ALL ~0
2610 /*@}*/
2611
2612
2613 /**
2614  * \name Bits to track array state changes
2615  *
2616  * Also used to summarize array enabled.
2617  */
2618 /*@{*/
2619 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2620 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2621 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2622 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2623 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2624 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2625 #define _NEW_ARRAY_INDEX            VERT_BIT_COLOR_INDEX
2626 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_EDGEFLAG
2627 #define _NEW_ARRAY_POINT_SIZE       VERT_BIT_COLOR_INDEX  /* aliased */
2628 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2629 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2630 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2631 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2632 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2633 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2634 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2635 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2636 #define _NEW_ARRAY_ATTRIB_0         VERT_BIT_GENERIC0  /* start at bit 16 */
2637 #define _NEW_ARRAY_ALL              0xffffffff
2638
2639
2640 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2641 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2642 /*@}*/
2643
2644
2645
2646 /**
2647  * \name A bunch of flags that we think might be useful to drivers.
2648  *
2649  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2650  */
2651 /*@{*/
2652 #define DD_FLATSHADE                0x1
2653 #define DD_SEPARATE_SPECULAR        0x2
2654 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2655 #define DD_TRI_LIGHT_TWOSIDE        0x8
2656 #define DD_TRI_UNFILLED             0x10
2657 #define DD_TRI_SMOOTH               0x20
2658 #define DD_TRI_STIPPLE              0x40
2659 #define DD_TRI_OFFSET               0x80
2660 #define DD_LINE_SMOOTH              0x100
2661 #define DD_LINE_STIPPLE             0x200
2662 #define DD_LINE_WIDTH               0x400
2663 #define DD_POINT_SMOOTH             0x800
2664 #define DD_POINT_SIZE               0x1000
2665 #define DD_POINT_ATTEN              0x2000
2666 #define DD_TRI_TWOSTENCIL           0x4000
2667 /*@}*/
2668
2669
2670 /**
2671  * \name Define the state changes under which each of these bits might change
2672  */
2673 /*@{*/
2674 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2675 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2676 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2677 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2678 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2679 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2680 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2681 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2682 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2683 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2684 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2685 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2686 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2687 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2688 /*@}*/
2689
2690
2691 /**
2692  * Composite state flags
2693  */
2694 /*@{*/
2695 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2696                                            _NEW_TEXTURE |       \
2697                                            _NEW_POINT |         \
2698                                            _NEW_PROGRAM |       \
2699                                            _NEW_MODELVIEW)
2700
2701 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2702                                            _NEW_TEXTURE)
2703
2704 #define _MESA_NEW_TRANSFER_STATE          (_NEW_PIXEL |         \
2705                                            _NEW_COLOR_MATRIX)
2706 /*@}*/
2707
2708
2709
2710
2711 /* This has to be included here. */
2712 #include "dd.h"
2713
2714
2715 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2716
2717 /**
2718  * Core Mesa's support for tnl modules:
2719  */
2720 struct gl_tnl_module
2721 {
2722    /**
2723     * Vertex format to be lazily swapped into current dispatch.
2724     */
2725    const GLvertexformat *Current;
2726
2727    /**
2728     * \name Record of functions swapped out.
2729     * On restore, only need to swap these functions back in.
2730     */
2731    /*@{*/
2732    struct {
2733        _glapi_proc * location;
2734        _glapi_proc function;
2735    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2736    GLuint SwapCount;
2737    /*@}*/
2738 };
2739
2740
2741 /**
2742  * Display list flags.
2743  * Strictly this is a tnl-private concept, but it doesn't seem
2744  * worthwhile adding a tnl private structure just to hold this one bit
2745  * of information:
2746  */
2747 #define DLIST_DANGLING_REFS     0x1
2748
2749
2750 /** Opaque declaration of display list payload data type */
2751 union gl_dlist_node;
2752
2753
2754 /**
2755  * Provide a location where information about a display list can be
2756  * collected.  Could be extended with driverPrivate structures,
2757  * etc. in the future.
2758  */
2759 struct gl_display_list
2760 {
2761    GLuint Name;
2762    GLbitfield Flags;  /**< DLIST_x flags */
2763    /** The dlist commands are in a linked list of nodes */
2764    union gl_dlist_node *Head;
2765 };
2766
2767
2768 /**
2769  * State used during display list compilation and execution.
2770  */
2771 struct gl_dlist_state
2772 {
2773    GLuint CallDepth;            /**< Current recursion calling depth */
2774
2775    struct gl_display_list *CurrentList; /**< List currently being compiled */
2776    union gl_dlist_node *CurrentBlock; /**< Pointer to current block of nodes */
2777    GLuint CurrentPos;           /**< Index into current block of nodes */
2778
2779    GLvertexformat ListVtxfmt;
2780
2781    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2782    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2783
2784    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2785    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2786
2787    GLubyte ActiveIndex;
2788    GLfloat CurrentIndex;
2789
2790    GLubyte ActiveEdgeFlag;
2791    GLboolean CurrentEdgeFlag;
2792 };
2793
2794
2795 /**
2796  * Mesa rendering context.
2797  *
2798  * This is the central context data structure for Mesa.  Almost all
2799  * OpenGL state is contained in this structure.
2800  * Think of this as a base class from which device drivers will derive
2801  * sub classes.
2802  *
2803  * The GLcontext typedef names this structure.
2804  */
2805 struct __GLcontextRec
2806 {
2807    /** State possibly shared with other contexts in the address space */
2808    struct gl_shared_state *Shared;
2809
2810    /** \name API function pointer tables */
2811    /*@{*/
2812    struct _glapi_table *Save;   /**< Display list save functions */
2813    struct _glapi_table *Exec;   /**< Execute functions */
2814    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2815    /*@}*/
2816
2817    GLvisual Visual;
2818    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2819    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2820    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2821    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2822
2823    /**
2824     * Device driver function pointer table
2825     */
2826    struct dd_function_table Driver;
2827
2828    void *DriverCtx;     /**< Points to device driver context/state */
2829
2830    /** Core/Driver constants */
2831    struct gl_constants Const;
2832
2833    /** \name The various 4x4 matrix stacks */
2834    /*@{*/
2835    struct gl_matrix_stack ModelviewMatrixStack;
2836    struct gl_matrix_stack ProjectionMatrixStack;
2837    struct gl_matrix_stack ColorMatrixStack;
2838    struct gl_matrix_stack TextureMatrixStack[MAX_TEXTURE_UNITS];
2839    struct gl_matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2840    struct gl_matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2841    /*@}*/
2842
2843    /** Combined modelview and projection matrix */
2844    GLmatrix _ModelProjectMatrix;
2845
2846    /** \name Display lists */
2847    struct gl_dlist_state ListState;
2848
2849    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2850    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2851
2852    /** Extension information */
2853    struct gl_extensions Extensions;
2854
2855    /** \name State attribute stack (for glPush/PopAttrib) */
2856    /*@{*/
2857    GLuint AttribStackDepth;
2858    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2859    /*@}*/
2860
2861    /** \name Renderer attribute groups
2862     *
2863     * We define a struct for each attribute group to make pushing and popping
2864     * attributes easy.  Also it's a good organization.
2865     */
2866    /*@{*/
2867    struct gl_accum_attrib       Accum;          /**< Accum buffer attributes */
2868    struct gl_colorbuffer_attrib Color;          /**< Color buffer attributes */
2869    struct gl_current_attrib     Current;        /**< Current attributes */
2870    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2871    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2872    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2873    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2874    struct gl_light_attrib       Light;          /**< Light attributes */
2875    struct gl_line_attrib        Line;           /**< Line attributes */
2876    struct gl_list_attrib        List;           /**< List attributes */
2877    struct gl_multisample_attrib Multisample;
2878    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2879    struct gl_point_attrib       Point;          /**< Point attributes */
2880    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2881    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2882    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2883    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2884    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2885    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2886    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2887    /*@}*/
2888
2889    /** \name Client attribute stack */
2890    /*@{*/
2891    GLuint ClientAttribStackDepth;
2892    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2893    /*@}*/
2894
2895    /** \name Client attribute groups */
2896    /*@{*/
2897    struct gl_array_attrib       Array;  /**< Vertex arrays */
2898    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2899    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2900    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2901    /*@}*/
2902
2903    /** \name Other assorted state (not pushed/popped on attribute stack) */
2904    /*@{*/
2905    struct gl_pixelmaps          PixelMaps;
2906    struct gl_histogram_attrib   Histogram;
2907    struct gl_minmax_attrib      MinMax;
2908    struct gl_convolution_attrib Convolution1D;
2909    struct gl_convolution_attrib Convolution2D;
2910    struct gl_convolution_attrib Separable2D;
2911
2912    struct gl_evaluators EvalMap;   /**< All evaluators */
2913    struct gl_feedback   Feedback;  /**< Feedback */
2914    struct gl_selection  Select;    /**< Selection */
2915
2916    struct gl_color_table ColorTable[COLORTABLE_MAX];
2917    struct gl_color_table ProxyColorTable[COLORTABLE_MAX];
2918
2919    struct gl_program_state Program;  /**< general program state */
2920    struct gl_vertex_program_state VertexProgram;
2921    struct gl_fragment_program_state FragmentProgram;
2922    struct gl_ati_fragment_shader_state ATIFragmentShader;
2923
2924    struct gl_shader_state Shader; /**< GLSL shader object state */
2925
2926    struct gl_query_state Query;  /**< occlusion, timer queries */
2927    /*@}*/
2928
2929 #if FEATURE_EXT_framebuffer_object
2930    struct gl_renderbuffer *CurrentRenderbuffer;
2931 #endif
2932
2933    GLenum ErrorValue;        /**< Last error code */
2934    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2935    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
2936
2937    GLbitfield varying_vp_inputs;  /**< mask of VERT_BIT_* flags */
2938
2939    /** \name Derived state */
2940    /*@{*/
2941    /** Bitwise-or of DD_* flags.  Note that this bitfield may be used before
2942     * state validation so they need to always be current.
2943     */
2944    GLbitfield _TriangleCaps;
2945    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2946    GLfloat _EyeZDir[3];
2947    GLfloat _ModelViewInvScale;
2948    GLboolean _NeedEyeCoords;
2949    GLboolean _ForceEyeCoords;
2950
2951    GLuint TextureStateTimestamp; /**< detect changes to shared state */
2952
2953    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2954    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2955    /**@}*/
2956
2957    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2958
2959    /** \name For debugging/development only */
2960    /*@{*/
2961    GLboolean FirstTimeCurrent;
2962    /*@}*/
2963
2964    /** Dither disable via MESA_NO_DITHER env var */
2965    GLboolean NoDither;
2966
2967    /** software compression/decompression supported or not */
2968    GLboolean Mesa_DXTn;
2969
2970    /** Core tnl module support */
2971    struct gl_tnl_module TnlModule;
2972
2973    /**
2974     * \name Hooks for module contexts.
2975     *
2976     * These will eventually live in the driver or elsewhere.
2977     */
2978    /*@{*/
2979    void *swrast_context;
2980    void *swsetup_context;
2981    void *swtnl_context;
2982    void *swtnl_im;
2983    struct st_context *st;
2984    void *aelt_context;
2985    /*@}*/
2986 };
2987
2988
2989 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2990 extern const char *_mesa_prim_name[GL_POLYGON+4];
2991
2992
2993 #ifdef DEBUG
2994 extern int MESA_VERBOSE;
2995 extern int MESA_DEBUG_FLAGS;
2996 # define MESA_FUNCTION __FUNCTION__
2997 #else
2998 # define MESA_VERBOSE 0
2999 # define MESA_DEBUG_FLAGS 0
3000 # define MESA_FUNCTION "a function"
3001 # ifndef NDEBUG
3002 #  define NDEBUG
3003 # endif
3004 #endif
3005
3006
3007 enum _verbose
3008 {
3009    VERBOSE_VARRAY               = 0x0001,
3010    VERBOSE_TEXTURE              = 0x0002,
3011    VERBOSE_IMMEDIATE            = 0x0004,
3012    VERBOSE_PIPELINE             = 0x0008,
3013    VERBOSE_DRIVER               = 0x0010,
3014    VERBOSE_STATE                = 0x0020,
3015    VERBOSE_API                  = 0x0040,
3016    VERBOSE_DISPLAY_LIST         = 0x0100,
3017    VERBOSE_LIGHTING             = 0x0200,
3018    VERBOSE_PRIMS                = 0x0400,
3019    VERBOSE_VERTS                = 0x0800,
3020    VERBOSE_DISASSEM             = 0x1000,
3021 };
3022
3023
3024 enum _debug
3025 {
3026    DEBUG_ALWAYS_FLUSH           = 0x1
3027 };
3028
3029
3030
3031 #endif /* MTYPES_H */