src/mesa/main/mtypes.h

   1 /**
   2  * \file mtypes.h
   3  * Main Mesa data structures.
   4  *
   5  * Please try to mark derived values with a leading underscore ('_').
   6  */
   7
   8 /*
   9  * Mesa 3-D graphics library
  10  * Version:  6.5
  11  *
  12  * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a
  15  * copy of this software and associated documentation files (the "Software"),
  16  * to deal in the Software without restriction, including without limitation
  17  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  18  * and/or sell copies of the Software, and to permit persons to whom the
  19  * Software is furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice shall be included
  22  * in all copies or substantial portions of the Software.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  25  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  27  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  28  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30  */
  31
  32
  33
  34 #ifndef TYPES_H
  35 #define TYPES_H
  36
  37
  38 #include "glheader.h"
  39 #include <GL/internal/glcore.h> /* GLimports/GLexports/GLcontextModes */
  40 #include "config.h"             /* Hardwired parameters */
  41 #include "glapitable.h"
  42 #include "glthread.h"
  43 #include "math/m_matrix.h"      /* GLmatrix */
  44
  45
  46 /**
  47  * Color channel data type.
  48  */
  49 #if CHAN_BITS == 8
  50    typedef GLubyte GLchan;
  51 #define CHAN_MAX 255
  52 #define CHAN_MAXF 255.0F
  53 #define CHAN_TYPE GL_UNSIGNED_BYTE
  54 #elif CHAN_BITS == 16
  55    typedef GLushort GLchan;
  56 #define CHAN_MAX 65535
  57 #define CHAN_MAXF 65535.0F
  58 #define CHAN_TYPE GL_UNSIGNED_SHORT
  59 #elif CHAN_BITS == 32
  60    typedef GLfloat GLchan;
  61 #define CHAN_MAX 1.0
  62 #define CHAN_MAXF 1.0F
  63 #define CHAN_TYPE GL_FLOAT
  64 #else
  65 #error "illegal number of color channel bits"
  66 #endif
  67
  68
  69 /**
  70  * Stencil buffer data type.
  71  */
  72 #if STENCIL_BITS==8
  73    typedef GLubyte GLstencil;
  74 #elif STENCIL_BITS==16
  75    typedef GLushort GLstencil;
  76 #else
  77 #  error "illegal number of stencil bits"
  78 #endif
  79
  80
  81 /**
  82  * Fixed point data type.
  83  */
  84 typedef int GLfixed;
  85 /*
  86  * Fixed point arithmetic macros
  87  */
  88 #ifndef FIXED_FRAC_BITS
  89 #define FIXED_FRAC_BITS 11
  90 #endif
  91
  92 #define FIXED_SHIFT     FIXED_FRAC_BITS
  93 #define FIXED_ONE       (1 << FIXED_SHIFT)
  94 #define FIXED_HALF      (1 << (FIXED_SHIFT-1))
  95 #define FIXED_FRAC_MASK (FIXED_ONE - 1)
  96 #define FIXED_INT_MASK  (~FIXED_FRAC_MASK)
  97 #define FIXED_EPSILON   1
  98 #define FIXED_SCALE     ((float) FIXED_ONE)
  99 #define FIXED_DBL_SCALE ((double) FIXED_ONE)
 100 #define FloatToFixed(X) (IROUND((X) * FIXED_SCALE))
 101 #define FixedToDouble(X) ((X) * (1.0 / FIXED_DBL_SCALE))
 102 #define IntToFixed(I)   ((I) << FIXED_SHIFT)
 103 #define FixedToInt(X)   ((X) >> FIXED_SHIFT)
 104 #define FixedToUns(X)   (((unsigned int)(X)) >> FIXED_SHIFT)
 105 #define FixedCeil(X)    (((X) + FIXED_ONE - FIXED_EPSILON) & FIXED_INT_MASK)
 106 #define FixedFloor(X)   ((X) & FIXED_INT_MASK)
 107 #define FixedToFloat(X) ((X) * (1.0F / FIXED_SCALE))
 108 #define PosFloatToFixed(X)      FloatToFixed(X)
 109 #define SignedFloatToFixed(X)   FloatToFixed(X)
 110
 111
 112
 113 /**
 114  * \name Some forward type declarations
 115  */
 116 /*@{*/
 117 struct _mesa_HashTable;
 118 struct gl_pixelstore_attrib;
 119 struct gl_texture_format;
 120 struct gl_texture_image;
 121 struct gl_texture_object;
 122 typedef struct __GLcontextRec GLcontext;
 123 typedef struct __GLcontextModesRec GLvisual;
 124 typedef struct gl_framebuffer GLframebuffer;
 125 /*@}*/
 126
 127
 128
 129 /**
 130  * Indexes for vertex program attributes.
 131  * GL_NV_vertex_program aliases generic attributes over the conventional
 132  * attributes.  In GL_ARB_vertex_program shader the aliasing is optional.
 133  * In GL_ARB_vertex_shader / OpenGL 2.0 the aliasing is disallowed (the
 134  * generic attributes are distinct/separate).
 135  */
 136 enum
 137 {
 138    VERT_ATTRIB_POS = 0,
 139    VERT_ATTRIB_WEIGHT = 1,
 140    VERT_ATTRIB_NORMAL = 2,
 141    VERT_ATTRIB_COLOR0 = 3,
 142    VERT_ATTRIB_COLOR1 = 4,
 143    VERT_ATTRIB_FOG = 5,
 144    VERT_ATTRIB_SIX = 6,
 145    VERT_ATTRIB_SEVEN = 7,
 146    VERT_ATTRIB_TEX0 = 8,
 147    VERT_ATTRIB_TEX1 = 9,
 148    VERT_ATTRIB_TEX2 = 10,
 149    VERT_ATTRIB_TEX3 = 11,
 150    VERT_ATTRIB_TEX4 = 12,
 151    VERT_ATTRIB_TEX5 = 13,
 152    VERT_ATTRIB_TEX6 = 14,
 153    VERT_ATTRIB_TEX7 = 15,
 154    VERT_ATTRIB_GENERIC0 = 16,
 155    VERT_ATTRIB_GENERIC1 = 17,
 156    VERT_ATTRIB_GENERIC2 = 18,
 157    VERT_ATTRIB_GENERIC3 = 19,
 158    VERT_ATTRIB_MAX = 16
 159 };
 160
 161 /**
 162  * Bitflags for vertex attributes.
 163  * These are used in bitfields in many places.
 164  */
 165 /*@{*/
 166 #define VERT_BIT_POS      (1 << VERT_ATTRIB_POS)
 167 #define VERT_BIT_WEIGHT   (1 << VERT_ATTRIB_WEIGHT)
 168 #define VERT_BIT_NORMAL   (1 << VERT_ATTRIB_NORMAL)
 169 #define VERT_BIT_COLOR0   (1 << VERT_ATTRIB_COLOR0)
 170 #define VERT_BIT_COLOR1   (1 << VERT_ATTRIB_COLOR1)
 171 #define VERT_BIT_FOG      (1 << VERT_ATTRIB_FOG)
 172 #define VERT_BIT_SIX      (1 << VERT_ATTRIB_SIX)
 173 #define VERT_BIT_SEVEN    (1 << VERT_ATTRIB_SEVEN)
 174 #define VERT_BIT_TEX0     (1 << VERT_ATTRIB_TEX0)
 175 #define VERT_BIT_TEX1     (1 << VERT_ATTRIB_TEX1)
 176 #define VERT_BIT_TEX2     (1 << VERT_ATTRIB_TEX2)
 177 #define VERT_BIT_TEX3     (1 << VERT_ATTRIB_TEX3)
 178 #define VERT_BIT_TEX4     (1 << VERT_ATTRIB_TEX4)
 179 #define VERT_BIT_TEX5     (1 << VERT_ATTRIB_TEX5)
 180 #define VERT_BIT_TEX6     (1 << VERT_ATTRIB_TEX6)
 181 #define VERT_BIT_TEX7     (1 << VERT_ATTRIB_TEX7)
 182 #define VERT_BIT_GENERIC0 (1 << VERT_ATTRIB_GENERIC0)
 183 #define VERT_BIT_GENERIC1 (1 << VERT_ATTRIB_GENERIC1)
 184 #define VERT_BIT_GENERIC2 (1 << VERT_ATTRIB_GENERIC2)
 185 #define VERT_BIT_GENERIC3 (1 << VERT_ATTRIB_GENERIC3)
 186
 187 #define VERT_BIT_TEX(u)  (1 << (VERT_ATTRIB_TEX0 + (u)))
 188 #define VERT_BIT_GENERIC(g)  (1 << (VERT_ATTRIB_GENERIC0 + (g)))
 189 /*@}*/
 190
 191
 192 /**
 193  * Indexes for vertex program result attributes
 194  */
 195 #define VERT_RESULT_HPOS 0
 196 #define VERT_RESULT_COL0 1
 197 #define VERT_RESULT_COL1 2
 198 #define VERT_RESULT_BFC0 3
 199 #define VERT_RESULT_BFC1 4
 200 #define VERT_RESULT_FOGC 5
 201 #define VERT_RESULT_PSIZ 6
 202 #define VERT_RESULT_TEX0 7
 203 #define VERT_RESULT_TEX1 8
 204 #define VERT_RESULT_TEX2 9
 205 #define VERT_RESULT_TEX3 10
 206 #define VERT_RESULT_TEX4 11
 207 #define VERT_RESULT_TEX5 12
 208 #define VERT_RESULT_TEX6 13
 209 #define VERT_RESULT_TEX7 14
 210 #define VERT_RESULT_MAX  15
 211
 212
 213 /**
 214  * Indexes for fragment program input attributes.
 215  */
 216 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 };
 231
 232 /*
 233  * Bitflags for fragment attributes.
 234  */
 235 /*@{*/
 236 #define FRAG_BIT_WPOS  (1 << FRAG_ATTRIB_WPOS)
 237 #define FRAG_BIT_COL0  (1 << FRAG_ATTRIB_COL0)
 238 #define FRAG_BIT_COL1  (1 << FRAG_ATTRIB_COL1)
 239 #define FRAG_BIT_FOGC  (1 << FRAG_ATTRIB_FOGC)
 240 #define FRAG_BIT_TEX0  (1 << FRAG_ATTRIB_TEX0)
 241 #define FRAG_BIT_TEX1  (1 << FRAG_ATTRIB_TEX1)
 242 #define FRAG_BIT_TEX2  (1 << FRAG_ATTRIB_TEX2)
 243 #define FRAG_BIT_TEX3  (1 << FRAG_ATTRIB_TEX3)
 244 #define FRAG_BIT_TEX4  (1 << FRAG_ATTRIB_TEX4)
 245 #define FRAG_BIT_TEX5  (1 << FRAG_ATTRIB_TEX5)
 246 #define FRAG_BIT_TEX6  (1 << FRAG_ATTRIB_TEX6)
 247 #define FRAG_BIT_TEX7  (1 << FRAG_ATTRIB_TEX7)
 248
 249 #define FRAG_BITS_TEX_ANY (FRAG_BIT_TEX0|       \
 250                            FRAG_BIT_TEX1|       \
 251                            FRAG_BIT_TEX2|       \
 252                            FRAG_BIT_TEX3|       \
 253                            FRAG_BIT_TEX4|       \
 254                            FRAG_BIT_TEX5|       \
 255                            FRAG_BIT_TEX6|       \
 256                            FRAG_BIT_TEX7)
 257 /*@}*/
 258
 259
 260 /**
 261  * Indexes for all renderbuffers
 262  */
 263 enum {
 264    BUFFER_FRONT_LEFT  = 0,  /* the four standard color buffers */
 265    BUFFER_BACK_LEFT   = 1,
 266    BUFFER_FRONT_RIGHT = 2,
 267    BUFFER_BACK_RIGHT  = 3,
 268    BUFFER_AUX0        = 4,  /* optional aux buffer */
 269    BUFFER_AUX1        = 5,
 270    BUFFER_AUX2        = 6,
 271    BUFFER_AUX3        = 7,
 272    BUFFER_DEPTH       = 8,
 273    BUFFER_STENCIL     = 9,
 274    BUFFER_ACCUM       = 10,
 275    BUFFER_COLOR0      = 11, /* generic renderbuffers */
 276    BUFFER_COLOR1      = 12,
 277    BUFFER_COLOR2      = 13,
 278    BUFFER_COLOR3      = 14,
 279    BUFFER_COLOR4      = 15,
 280    BUFFER_COLOR5      = 16,
 281    BUFFER_COLOR6      = 17,
 282    BUFFER_COLOR7      = 18,
 283    BUFFER_COUNT       = 19
 284 };
 285
 286 /**
 287  * Bit flags for all renderbuffers
 288  */
 289 #define BUFFER_BIT_FRONT_LEFT   (1 << BUFFER_FRONT_LEFT)
 290 #define BUFFER_BIT_BACK_LEFT    (1 << BUFFER_BACK_LEFT)
 291 #define BUFFER_BIT_FRONT_RIGHT  (1 << BUFFER_FRONT_RIGHT)
 292 #define BUFFER_BIT_BACK_RIGHT   (1 << BUFFER_BACK_RIGHT)
 293 #define BUFFER_BIT_AUX0         (1 << BUFFER_AUX0)
 294 #define BUFFER_BIT_AUX1         (1 << BUFFER_AUX1)
 295 #define BUFFER_BIT_AUX2         (1 << BUFFER_AUX2)
 296 #define BUFFER_BIT_AUX3         (1 << BUFFER_AUX3)
 297 #define BUFFER_BIT_DEPTH        (1 << BUFFER_DEPTH)
 298 #define BUFFER_BIT_STENCIL      (1 << BUFFER_STENCIL)
 299 #define BUFFER_BIT_ACCUM        (1 << BUFFER_ACCUM)
 300 #define BUFFER_BIT_COLOR0       (1 << BUFFER_COLOR0)
 301 #define BUFFER_BIT_COLOR1       (1 << BUFFER_COLOR1)
 302 #define BUFFER_BIT_COLOR2       (1 << BUFFER_COLOR2)
 303 #define BUFFER_BIT_COLOR3       (1 << BUFFER_COLOR3)
 304 #define BUFFER_BIT_COLOR4       (1 << BUFFER_COLOR4)
 305 #define BUFFER_BIT_COLOR5       (1 << BUFFER_COLOR5)
 306 #define BUFFER_BIT_COLOR6       (1 << BUFFER_COLOR6)
 307 #define BUFFER_BIT_COLOR7       (1 << BUFFER_COLOR7)
 308
 309
 310 /**
 311  * Data structure for color tables
 312  */
 313 struct gl_color_table
 314 {
 315    GLenum Format;         /**< GL_ALPHA, GL_RGB, GL_RGB, etc */
 316    GLenum IntFormat;
 317    GLuint Size;           /**< number of entries (rows) in table */
 318    GLvoid *Table;         /**< points to data of <Type> */
 319    GLenum Type;           /**< GL_UNSIGNED_BYTE or GL_FLOAT */
 320    GLubyte RedSize;
 321    GLubyte GreenSize;
 322    GLubyte BlueSize;
 323    GLubyte AlphaSize;
 324    GLubyte LuminanceSize;
 325    GLubyte IntensitySize;
 326 };
 327
 328
 329 /**
 330  * \name Bit flags used for updating material values.
 331  */
 332 /*@{*/
 333 #define MAT_ATTRIB_FRONT_AMBIENT           0
 334 #define MAT_ATTRIB_BACK_AMBIENT            1
 335 #define MAT_ATTRIB_FRONT_DIFFUSE           2
 336 #define MAT_ATTRIB_BACK_DIFFUSE            3
 337 #define MAT_ATTRIB_FRONT_SPECULAR          4
 338 #define MAT_ATTRIB_BACK_SPECULAR           5
 339 #define MAT_ATTRIB_FRONT_EMISSION          6
 340 #define MAT_ATTRIB_BACK_EMISSION           7
 341 #define MAT_ATTRIB_FRONT_SHININESS         8
 342 #define MAT_ATTRIB_BACK_SHININESS          9
 343 #define MAT_ATTRIB_FRONT_INDEXES           10
 344 #define MAT_ATTRIB_BACK_INDEXES            11
 345 #define MAT_ATTRIB_MAX                     12
 346
 347 #define MAT_ATTRIB_AMBIENT(f)  (MAT_ATTRIB_FRONT_AMBIENT+(f))
 348 #define MAT_ATTRIB_DIFFUSE(f)  (MAT_ATTRIB_FRONT_DIFFUSE+(f))
 349 #define MAT_ATTRIB_SPECULAR(f) (MAT_ATTRIB_FRONT_SPECULAR+(f))
 350 #define MAT_ATTRIB_EMISSION(f) (MAT_ATTRIB_FRONT_EMISSION+(f))
 351 #define MAT_ATTRIB_SHININESS(f)(MAT_ATTRIB_FRONT_SHININESS+(f))
 352 #define MAT_ATTRIB_INDEXES(f)  (MAT_ATTRIB_FRONT_INDEXES+(f))
 353
 354 #define MAT_INDEX_AMBIENT  0
 355 #define MAT_INDEX_DIFFUSE  1
 356 #define MAT_INDEX_SPECULAR 2
 357
 358 #define MAT_BIT_FRONT_AMBIENT         (1<<MAT_ATTRIB_FRONT_AMBIENT)
 359 #define MAT_BIT_BACK_AMBIENT          (1<<MAT_ATTRIB_BACK_AMBIENT)
 360 #define MAT_BIT_FRONT_DIFFUSE         (1<<MAT_ATTRIB_FRONT_DIFFUSE)
 361 #define MAT_BIT_BACK_DIFFUSE          (1<<MAT_ATTRIB_BACK_DIFFUSE)
 362 #define MAT_BIT_FRONT_SPECULAR        (1<<MAT_ATTRIB_FRONT_SPECULAR)
 363 #define MAT_BIT_BACK_SPECULAR         (1<<MAT_ATTRIB_BACK_SPECULAR)
 364 #define MAT_BIT_FRONT_EMISSION        (1<<MAT_ATTRIB_FRONT_EMISSION)
 365 #define MAT_BIT_BACK_EMISSION         (1<<MAT_ATTRIB_BACK_EMISSION)
 366 #define MAT_BIT_FRONT_SHININESS       (1<<MAT_ATTRIB_FRONT_SHININESS)
 367 #define MAT_BIT_BACK_SHININESS        (1<<MAT_ATTRIB_BACK_SHININESS)
 368 #define MAT_BIT_FRONT_INDEXES         (1<<MAT_ATTRIB_FRONT_INDEXES)
 369 #define MAT_BIT_BACK_INDEXES          (1<<MAT_ATTRIB_BACK_INDEXES)
 370
 371
 372 #define FRONT_MATERIAL_BITS     (MAT_BIT_FRONT_EMISSION |       \
 373                                  MAT_BIT_FRONT_AMBIENT |        \
 374                                  MAT_BIT_FRONT_DIFFUSE |        \
 375                                  MAT_BIT_FRONT_SPECULAR |       \
 376                                  MAT_BIT_FRONT_SHININESS |      \
 377                                  MAT_BIT_FRONT_INDEXES)
 378
 379 #define BACK_MATERIAL_BITS      (MAT_BIT_BACK_EMISSION |        \
 380                                  MAT_BIT_BACK_AMBIENT |         \
 381                                  MAT_BIT_BACK_DIFFUSE |         \
 382                                  MAT_BIT_BACK_SPECULAR |        \
 383                                  MAT_BIT_BACK_SHININESS |       \
 384                                  MAT_BIT_BACK_INDEXES)
 385
 386 #define ALL_MATERIAL_BITS       (FRONT_MATERIAL_BITS | BACK_MATERIAL_BITS)
 387 /*@}*/
 388
 389
 390 #define EXP_TABLE_SIZE 512      /**< Specular exponent lookup table sizes */
 391 #define SHINE_TABLE_SIZE 256    /**< Material shininess lookup table sizes */
 392
 393 /**
 394  * Material shininess lookup table.
 395  */
 396 struct gl_shine_tab
 397 {
 398    struct gl_shine_tab *next, *prev;
 399    GLfloat tab[SHINE_TABLE_SIZE+1];
 400    GLfloat shininess;
 401    GLuint refcount;
 402 };
 403
 404
 405 /**
 406  * Light source state.
 407  */
 408 struct gl_light
 409 {
 410    struct gl_light *next;       /**< double linked list with sentinel */
 411    struct gl_light *prev;
 412
 413    GLfloat Ambient[4];          /**< ambient color */
 414    GLfloat Diffuse[4];          /**< diffuse color */
 415    GLfloat Specular[4];         /**< specular color */
 416    GLfloat EyePosition[4];      /**< position in eye coordinates */
 417    GLfloat EyeDirection[4];     /**< spotlight dir in eye coordinates */
 418    GLfloat SpotExponent;
 419    GLfloat SpotCutoff;          /**< in degrees */
 420    GLfloat _CosCutoff;          /**< = MAX(0, cos(SpotCutoff)) */
 421    GLfloat ConstantAttenuation;
 422    GLfloat LinearAttenuation;
 423    GLfloat QuadraticAttenuation;
 424    GLboolean Enabled;           /**< On/off flag */
 425
 426    /**
 427     * \name Derived fields
 428     */
 429    /*@{*/
 430    GLbitfield _Flags;           /**< State */
 431
 432    GLfloat _Position[4];        /**< position in eye/obj coordinates */
 433    GLfloat _VP_inf_norm[3];     /**< Norm direction to infinite light */
 434    GLfloat _h_inf_norm[3];      /**< Norm( _VP_inf_norm + <0,0,1> ) */
 435    GLfloat _NormDirection[4];   /**< normalized spotlight direction */
 436    GLfloat _VP_inf_spot_attenuation;
 437
 438    GLfloat _SpotExpTable[EXP_TABLE_SIZE][2];  /**< to replace a pow() call */
 439    GLfloat _MatAmbient[2][3];   /**< material ambient * light ambient */
 440    GLfloat _MatDiffuse[2][3];   /**< material diffuse * light diffuse */
 441    GLfloat _MatSpecular[2][3];  /**< material spec * light specular */
 442    GLfloat _dli;                /**< CI diffuse light intensity */
 443    GLfloat _sli;                /**< CI specular light intensity */
 444    /*@}*/
 445 };
 446
 447
 448 /**
 449  * Light model state.
 450  */
 451 struct gl_lightmodel
 452 {
 453    GLfloat Ambient[4];          /**< ambient color */
 454    GLboolean LocalViewer;       /**< Local (or infinite) view point? */
 455    GLboolean TwoSide;           /**< Two (or one) sided lighting? */
 456    GLenum ColorControl;         /**< either GL_SINGLE_COLOR
 457                                  *    or GL_SEPARATE_SPECULAR_COLOR */
 458 };
 459
 460
 461 /**
 462  * Material state.
 463  */
 464 struct gl_material
 465 {
 466    GLfloat Attrib[MAT_ATTRIB_MAX][4];
 467 };
 468
 469
 470 /**
 471  * Accumulation buffer attribute group (GL_ACCUM_BUFFER_BIT)
 472  */
 473 struct gl_accum_attrib
 474 {
 475    GLfloat ClearColor[4];       /**< Accumulation buffer clear color */
 476 };
 477
 478
 479 /**
 480  * Color buffer attribute group (GL_COLOR_BUFFER_BIT).
 481  */
 482 struct gl_colorbuffer_attrib
 483 {
 484    GLuint ClearIndex;                   /**< Index to use for glClear */
 485    GLclampf ClearColor[4];              /**< Color to use for glClear */
 486
 487    GLuint IndexMask;                    /**< Color index write mask */
 488    GLubyte ColorMask[4];                /**< Each flag is 0xff or 0x0 */
 489
 490    GLenum DrawBuffer[MAX_DRAW_BUFFERS]; /**< Which buffer to draw into */
 491
 492    /**
 493     * \name alpha testing
 494     */
 495    /*@{*/
 496    GLboolean AlphaEnabled;              /**< Alpha test enabled flag */
 497    GLenum AlphaFunc;                    /**< Alpha test function */
 498    GLclampf AlphaRef;                   /**< Alpha reference value */
 499    /*@}*/
 500
 501    /**
 502     * \name Blending
 503     */
 504    /*@{*/
 505    GLboolean BlendEnabled;              /**< Blending enabled flag */
 506    GLenum BlendSrcRGB;                  /**< Blending source operator */
 507    GLenum BlendDstRGB;                  /**< Blending destination operator */
 508    GLenum BlendSrcA;                    /**< GL_INGR_blend_func_separate */
 509    GLenum BlendDstA;                    /**< GL_INGR_blend_func_separate */
 510    GLenum BlendEquationRGB;             /**< Blending equation */
 511    GLenum BlendEquationA;               /**< GL_EXT_blend_equation_separate */
 512    GLfloat BlendColor[4];               /**< Blending color */
 513    /*@}*/
 514
 515    /**
 516     * \name Logic op
 517     */
 518    /*@{*/
 519    GLenum LogicOp;                      /**< Logic operator */
 520    GLboolean IndexLogicOpEnabled;       /**< Color index logic op enabled flag */
 521    GLboolean ColorLogicOpEnabled;       /**< RGBA logic op enabled flag */
 522    GLboolean _LogicOpEnabled;           /**< RGBA logic op + EXT_blend_logic_op enabled flag */
 523    /*@}*/
 524
 525    GLboolean DitherFlag;                /**< Dither enable flag */
 526 };
 527
 528
 529 /**
 530  * Current attribute group (GL_CURRENT_BIT).
 531  */
 532 struct gl_current_attrib
 533 {
 534    /**
 535     * \name Values valid only when FLUSH_VERTICES has been called.
 536     */
 537    /*@{*/
 538    GLfloat Attrib[VERT_ATTRIB_MAX][4];          /**< Current vertex attributes
 539                                                   *  indexed by VERT_ATTRIB_* */
 540    GLfloat Index;                               /**< Current color index */
 541    GLboolean EdgeFlag;                          /**< Current edge flag */
 542    /*@}*/
 543
 544    /**
 545     * \name Values are always valid.
 546     *
 547     * \note BTW, note how similar this set of attributes is to the SWvertex
 548     * data type in the software rasterizer...
 549     */
 550    /*@{*/
 551    GLfloat RasterPos[4];                        /**< Current raster position */
 552    GLfloat RasterDistance;                      /**< Current raster distance */
 553    GLfloat RasterColor[4];                      /**< Current raster color */
 554    GLfloat RasterSecondaryColor[4];             /**< Current raster secondary color */
 555    GLfloat RasterIndex;                         /**< Current raster index */
 556    GLfloat RasterTexCoords[MAX_TEXTURE_UNITS][4];/**< Current raster texcoords */
 557    GLboolean RasterPosValid;                    /**< Raster pos valid flag */
 558    /*@}*/
 559 };
 560
 561
 562 /**
 563  * Depth buffer attribute group (GL_DEPTH_BUFFER_BIT).
 564  */
 565 struct gl_depthbuffer_attrib
 566 {
 567    GLenum Func;                 /**< Function for depth buffer compare */
 568    GLclampd Clear;              /**< Value to clear depth buffer to */
 569    GLboolean Test;              /**< Depth buffering enabled flag */
 570    GLboolean Mask;              /**< Depth buffer writable? */
 571    GLboolean BoundsTest;        /**< GL_EXT_depth_bounds_test */
 572    GLfloat BoundsMin, BoundsMax;/**< GL_EXT_depth_bounds_test */
 573 };
 574
 575
 576 /**
 577  * glEnable()/glDisable() attribute group (GL_ENABLE_BIT).
 578  */
 579 struct gl_enable_attrib
 580 {
 581    GLboolean AlphaTest;
 582    GLboolean AutoNormal;
 583    GLboolean Blend;
 584    GLbitfield ClipPlanes;
 585    GLboolean ColorMaterial;
 586    GLboolean ColorTable;                /* SGI_color_table */
 587    GLboolean PostColorMatrixColorTable; /* SGI_color_table */
 588    GLboolean PostConvolutionColorTable; /* SGI_color_table */
 589    GLboolean Convolution1D;
 590    GLboolean Convolution2D;
 591    GLboolean Separable2D;
 592    GLboolean CullFace;
 593    GLboolean DepthTest;
 594    GLboolean Dither;
 595    GLboolean Fog;
 596    GLboolean Histogram;
 597    GLboolean Light[MAX_LIGHTS];
 598    GLboolean Lighting;
 599    GLboolean LineSmooth;
 600    GLboolean LineStipple;
 601    GLboolean IndexLogicOp;
 602    GLboolean ColorLogicOp;
 603    GLboolean Map1Color4;
 604    GLboolean Map1Index;
 605    GLboolean Map1Normal;
 606    GLboolean Map1TextureCoord1;
 607    GLboolean Map1TextureCoord2;
 608    GLboolean Map1TextureCoord3;
 609    GLboolean Map1TextureCoord4;
 610    GLboolean Map1Vertex3;
 611    GLboolean Map1Vertex4;
 612    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 613    GLboolean Map2Color4;
 614    GLboolean Map2Index;
 615    GLboolean Map2Normal;
 616    GLboolean Map2TextureCoord1;
 617    GLboolean Map2TextureCoord2;
 618    GLboolean Map2TextureCoord3;
 619    GLboolean Map2TextureCoord4;
 620    GLboolean Map2Vertex3;
 621    GLboolean Map2Vertex4;
 622    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 623    GLboolean MinMax;
 624    GLboolean Normalize;
 625    GLboolean PixelTexture;
 626    GLboolean PointSmooth;
 627    GLboolean PolygonOffsetPoint;
 628    GLboolean PolygonOffsetLine;
 629    GLboolean PolygonOffsetFill;
 630    GLboolean PolygonSmooth;
 631    GLboolean PolygonStipple;
 632    GLboolean RescaleNormals;
 633    GLboolean Scissor;
 634    GLboolean Stencil;
 635    GLboolean StencilTwoSide;          /* GL_EXT_stencil_two_side */
 636    GLboolean MultisampleEnabled;      /* GL_ARB_multisample */
 637    GLboolean SampleAlphaToCoverage;   /* GL_ARB_multisample */
 638    GLboolean SampleAlphaToOne;        /* GL_ARB_multisample */
 639    GLboolean SampleCoverage;          /* GL_ARB_multisample */
 640    GLboolean SampleCoverageInvert;    /* GL_ARB_multisample */
 641    GLboolean RasterPositionUnclipped; /* GL_IBM_rasterpos_clip */
 642    GLuint Texture[MAX_TEXTURE_IMAGE_UNITS];
 643    GLuint TexGen[MAX_TEXTURE_COORD_UNITS];
 644    /* SGI_texture_color_table */
 645    GLboolean TextureColorTable[MAX_TEXTURE_IMAGE_UNITS];
 646    /* GL_NV_vertex_program */
 647    GLboolean VertexProgram;
 648    GLboolean VertexProgramPointSize;
 649    GLboolean VertexProgramTwoSide;
 650    /* GL_ARB_point_sprite / GL_NV_point_sprite */
 651    GLboolean PointSprite;
 652    GLboolean FragmentShaderATI;
 653 };
 654
 655
 656 /**
 657  * Evaluator attribute group (GL_EVAL_BIT).
 658  */
 659 struct gl_eval_attrib
 660 {
 661    /**
 662     * \name Enable bits
 663     */
 664    /*@{*/
 665    GLboolean Map1Color4;
 666    GLboolean Map1Index;
 667    GLboolean Map1Normal;
 668    GLboolean Map1TextureCoord1;
 669    GLboolean Map1TextureCoord2;
 670    GLboolean Map1TextureCoord3;
 671    GLboolean Map1TextureCoord4;
 672    GLboolean Map1Vertex3;
 673    GLboolean Map1Vertex4;
 674    GLboolean Map1Attrib[16];  /* GL_NV_vertex_program */
 675    GLboolean Map2Color4;
 676    GLboolean Map2Index;
 677    GLboolean Map2Normal;
 678    GLboolean Map2TextureCoord1;
 679    GLboolean Map2TextureCoord2;
 680    GLboolean Map2TextureCoord3;
 681    GLboolean Map2TextureCoord4;
 682    GLboolean Map2Vertex3;
 683    GLboolean Map2Vertex4;
 684    GLboolean Map2Attrib[16];  /* GL_NV_vertex_program */
 685    GLboolean AutoNormal;
 686    /*@}*/
 687
 688    /**
 689     * \name Map Grid endpoints and divisions and calculated du values
 690     */
 691    /*@{*/
 692    GLint MapGrid1un;
 693    GLfloat MapGrid1u1, MapGrid1u2, MapGrid1du;
 694    GLint MapGrid2un, MapGrid2vn;
 695    GLfloat MapGrid2u1, MapGrid2u2, MapGrid2du;
 696    GLfloat MapGrid2v1, MapGrid2v2, MapGrid2dv;
 697    /*@}*/
 698 };
 699
 700
 701 /**
 702  * Fog attribute group (GL_FOG_BIT).
 703  */
 704 struct gl_fog_attrib
 705 {
 706    GLboolean Enabled;           /**< Fog enabled flag */
 707    GLfloat Color[4];            /**< Fog color */
 708    GLfloat Density;             /**< Density >= 0.0 */
 709    GLfloat Start;               /**< Start distance in eye coords */
 710    GLfloat End;                 /**< End distance in eye coords */
 711    GLfloat Index;               /**< Fog index */
 712    GLenum Mode;                 /**< Fog mode */
 713    GLboolean ColorSumEnabled;
 714    GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
 715 };
 716
 717
 718 /**
 719  * Hint attribute group (GL_HINT_BIT).
 720  *
 721  * Values are always one of GL_FASTEST, GL_NICEST, or GL_DONT_CARE.
 722  */
 723 struct gl_hint_attrib
 724 {
 725    GLenum PerspectiveCorrection;
 726    GLenum PointSmooth;
 727    GLenum LineSmooth;
 728    GLenum PolygonSmooth;
 729    GLenum Fog;
 730    GLenum ClipVolumeClipping;   /**< GL_EXT_clip_volume_hint */
 731    GLenum TextureCompression;   /**< GL_ARB_texture_compression */
 732    GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
 733    GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 734 };
 735
 736
 737 /**
 738  * Histogram attributes.
 739  */
 740 struct gl_histogram_attrib
 741 {
 742    GLuint Width;                                /**< number of table entries */
 743    GLint Format;                                /**< GL_ALPHA, GL_RGB, etc */
 744    GLuint Count[HISTOGRAM_TABLE_SIZE][4];       /**< the histogram */
 745    GLboolean Sink;                              /**< terminate image transfer? */
 746    GLubyte RedSize;                             /**< Bits per counter */
 747    GLubyte GreenSize;
 748    GLubyte BlueSize;
 749    GLubyte AlphaSize;
 750    GLubyte LuminanceSize;
 751 };
 752
 753
 754 /**
 755  * Color Min/max state.
 756  */
 757 struct gl_minmax_attrib
 758 {
 759    GLenum Format;
 760    GLboolean Sink;
 761    GLfloat Min[4], Max[4];   /**< RGBA */
 762 };
 763
 764
 765 /**
 766  * Image convolution state.
 767  */
 768 struct gl_convolution_attrib
 769 {
 770    GLenum Format;
 771    GLenum InternalFormat;
 772    GLuint Width;
 773    GLuint Height;
 774    GLfloat Filter[MAX_CONVOLUTION_WIDTH * MAX_CONVOLUTION_HEIGHT * 4];
 775 };
 776
 777
 778 /**
 779  * Light state flags.
 780  */
 781 /*@{*/
 782 #define LIGHT_SPOT         0x1
 783 #define LIGHT_LOCAL_VIEWER 0x2
 784 #define LIGHT_POSITIONAL   0x4
 785 #define LIGHT_NEED_VERTICES (LIGHT_POSITIONAL|LIGHT_LOCAL_VIEWER)
 786 /*@}*/
 787
 788
 789 /**
 790  * Lighting attribute group (GL_LIGHT_BIT).
 791  */
 792 struct gl_light_attrib
 793 {
 794    struct gl_light Light[MAX_LIGHTS];   /**< Array of light sources */
 795    struct gl_lightmodel Model;          /**< Lighting model */
 796
 797    /**
 798     * Must flush FLUSH_VERTICES before referencing:
 799     */
 800    /*@{*/
 801    struct gl_material Material;         /**< Includes front & back values */
 802    /*@}*/
 803
 804    GLboolean Enabled;                   /**< Lighting enabled flag */
 805    GLenum ShadeModel;                   /**< GL_FLAT or GL_SMOOTH */
 806    GLenum ColorMaterialFace;            /**< GL_FRONT, BACK or FRONT_AND_BACK */
 807    GLenum ColorMaterialMode;            /**< GL_AMBIENT, GL_DIFFUSE, etc */
 808    GLbitfield ColorMaterialBitmask;     /**< bitmask formed from Face and Mode */
 809    GLboolean ColorMaterialEnabled;
 810
 811    struct gl_light EnabledList;         /**< List sentinel */
 812
 813    /**
 814     * Derived state for optimizations:
 815     */
 816    /*@{*/
 817    GLboolean _NeedEyeCoords;
 818    GLboolean _NeedVertices;             /**< Use fast shader? */
 819    GLbitfield  _Flags;                  /**< LIGHT_* flags, see above */
 820    GLfloat _BaseColor[2][3];
 821    /*@}*/
 822 };
 823
 824
 825 /**
 826  * Line attribute group (GL_LINE_BIT).
 827  */
 828 struct gl_line_attrib
 829 {
 830    GLboolean SmoothFlag;        /**< GL_LINE_SMOOTH enabled? */
 831    GLboolean StippleFlag;       /**< GL_LINE_STIPPLE enabled? */
 832    GLushort StipplePattern;     /**< Stipple pattern */
 833    GLint StippleFactor;         /**< Stipple repeat factor */
 834    GLfloat Width;               /**< Line width */
 835    GLfloat _Width;              /**< Clamped Line width */
 836 };
 837
 838
 839 /**
 840  * Display list attribute group (GL_LIST_BIT).
 841  */
 842 struct gl_list_attrib
 843 {
 844    GLuint ListBase;
 845 };
 846
 847
 848 /**
 849  * Used by device drivers to hook new commands into display lists.
 850  */
 851 struct gl_list_instruction
 852 {
 853    GLuint Size;
 854    void (*Execute)( GLcontext *ctx, void *data );
 855    void (*Destroy)( GLcontext *ctx, void *data );
 856    void (*Print)( GLcontext *ctx, void *data );
 857 };
 858
 859 #define MAX_DLIST_EXT_OPCODES 16
 860
 861 /**
 862  * Used by device drivers to hook new commands into display lists.
 863  */
 864 struct gl_list_extensions
 865 {
 866    struct gl_list_instruction Opcode[MAX_DLIST_EXT_OPCODES];
 867    GLuint NumOpcodes;
 868 };
 869
 870
 871 /**
 872  * Multisample attribute group (GL_MULTISAMPLE_BIT).
 873  */
 874 struct gl_multisample_attrib
 875 {
 876    GLboolean Enabled;
 877    GLboolean SampleAlphaToCoverage;
 878    GLboolean SampleAlphaToOne;
 879    GLboolean SampleCoverage;
 880    GLfloat SampleCoverageValue;
 881    GLboolean SampleCoverageInvert;
 882 };
 883
 884
 885 /**
 886  * Pixel attribute group (GL_PIXEL_MODE_BIT).
 887  */
 888 struct gl_pixel_attrib
 889 {
 890    GLenum ReadBuffer;           /**< source buffer for glRead/CopyPixels() */
 891    GLfloat RedBias, RedScale;
 892    GLfloat GreenBias, GreenScale;
 893    GLfloat BlueBias, BlueScale;
 894    GLfloat AlphaBias, AlphaScale;
 895    GLfloat DepthBias, DepthScale;
 896    GLint IndexShift, IndexOffset;
 897    GLboolean MapColorFlag;
 898    GLboolean MapStencilFlag;
 899    GLfloat ZoomX, ZoomY;
 900    /* XXX move these out of gl_pixel_attrib */
 901    GLint MapStoSsize;           /**< Size of each pixel map */
 902    GLint MapItoIsize;
 903    GLint MapItoRsize;
 904    GLint MapItoGsize;
 905    GLint MapItoBsize;
 906    GLint MapItoAsize;
 907    GLint MapRtoRsize;
 908    GLint MapGtoGsize;
 909    GLint MapBtoBsize;
 910    GLint MapAtoAsize;
 911    GLint MapStoS[MAX_PIXEL_MAP_TABLE];  /**< Pixel map tables */
 912    GLfloat MapItoI[MAX_PIXEL_MAP_TABLE];
 913    GLfloat MapItoR[MAX_PIXEL_MAP_TABLE];
 914    GLfloat MapItoG[MAX_PIXEL_MAP_TABLE];
 915    GLfloat MapItoB[MAX_PIXEL_MAP_TABLE];
 916    GLfloat MapItoA[MAX_PIXEL_MAP_TABLE];
 917    GLubyte MapItoR8[MAX_PIXEL_MAP_TABLE];  /**< converted to 8-bit color */
 918    GLubyte MapItoG8[MAX_PIXEL_MAP_TABLE];
 919    GLubyte MapItoB8[MAX_PIXEL_MAP_TABLE];
 920    GLubyte MapItoA8[MAX_PIXEL_MAP_TABLE];
 921    GLfloat MapRtoR[MAX_PIXEL_MAP_TABLE];
 922    GLfloat MapGtoG[MAX_PIXEL_MAP_TABLE];
 923    GLfloat MapBtoB[MAX_PIXEL_MAP_TABLE];
 924    GLfloat MapAtoA[MAX_PIXEL_MAP_TABLE];
 925    /** GL_EXT_histogram */
 926    GLboolean HistogramEnabled;
 927    GLboolean MinMaxEnabled;
 928    /** GL_SGIS_pixel_texture */
 929    GLboolean PixelTextureEnabled;
 930    GLenum FragmentRgbSource;
 931    GLenum FragmentAlphaSource;
 932    /** GL_SGI_color_matrix */
 933    GLfloat PostColorMatrixScale[4];  /**< RGBA */
 934    GLfloat PostColorMatrixBias[4];   /**< RGBA */
 935    /** GL_SGI_color_table */
 936    GLfloat ColorTableScale[4];
 937    GLfloat ColorTableBias[4];
 938    GLboolean ColorTableEnabled;
 939    GLfloat PCCTscale[4];
 940    GLfloat PCCTbias[4];
 941    GLboolean PostConvolutionColorTableEnabled;
 942    GLfloat PCMCTscale[4];
 943    GLfloat PCMCTbias[4];
 944    GLboolean PostColorMatrixColorTableEnabled;
 945    /** GL_SGI_texture_color_table */
 946    GLfloat TextureColorTableScale[4];
 947    GLfloat TextureColorTableBias[4];
 948    /** Convolution */
 949    GLboolean Convolution1DEnabled;
 950    GLboolean Convolution2DEnabled;
 951    GLboolean Separable2DEnabled;
 952    GLfloat ConvolutionBorderColor[3][4];
 953    GLenum ConvolutionBorderMode[3];
 954    GLfloat ConvolutionFilterScale[3][4];
 955    GLfloat ConvolutionFilterBias[3][4];
 956    GLfloat PostConvolutionScale[4];  /**< RGBA */
 957    GLfloat PostConvolutionBias[4];   /**< RGBA */
 958 };
 959
 960
 961 /**
 962  * Point attribute group (GL_POINT_BIT).
 963  */
 964 struct gl_point_attrib
 965 {
 966    GLboolean SmoothFlag;        /**< True if GL_POINT_SMOOTH is enabled */
 967    GLfloat Size;                /**< User-specified point size */
 968    GLfloat _Size;               /**< Size clamped to Const.Min/MaxPointSize */
 969    GLfloat Params[3];           /**< GL_EXT_point_parameters */
 970    GLfloat MinSize, MaxSize;    /**< GL_EXT_point_parameters */
 971    GLfloat Threshold;           /**< GL_EXT_point_parameters */
 972    GLboolean _Attenuated;       /**< True if Params != [1, 0, 0] */
 973    GLboolean PointSprite;       /**< GL_NV_point_sprite / GL_NV_point_sprite */
 974    GLboolean CoordReplace[MAX_TEXTURE_UNITS]; /**< GL_NV/ARB_point_sprite */
 975    GLenum SpriteRMode;          /**< GL_NV_point_sprite (only!) */
 976    GLenum SpriteOrigin;         /**< GL_ARB_point_sprite */
 977 };
 978
 979
 980 /**
 981  * Polygon attribute group (GL_POLYGON_BIT).
 982  */
 983 struct gl_polygon_attrib
 984 {
 985    GLenum FrontFace;            /**< Either GL_CW or GL_CCW */
 986    GLenum FrontMode;            /**< Either GL_POINT, GL_LINE or GL_FILL */
 987    GLenum BackMode;             /**< Either GL_POINT, GL_LINE or GL_FILL */
 988    GLboolean _FrontBit;         /**< 0=GL_CCW, 1=GL_CW */
 989    GLboolean CullFlag;          /**< Culling on/off flag */
 990    GLboolean SmoothFlag;        /**< True if GL_POLYGON_SMOOTH is enabled */
 991    GLboolean StippleFlag;       /**< True if GL_POLYGON_STIPPLE is enabled */
 992    GLenum CullFaceMode;         /**< Culling mode GL_FRONT or GL_BACK */
 993    GLfloat OffsetFactor;        /**< Polygon offset factor, from user */
 994    GLfloat OffsetUnits;         /**< Polygon offset units, from user */
 995    GLboolean OffsetPoint;       /**< Offset in GL_POINT mode */
 996    GLboolean OffsetLine;        /**< Offset in GL_LINE mode */
 997    GLboolean OffsetFill;        /**< Offset in GL_FILL mode */
 998 };
 999
1000
1001 /**
1002  * Scissor attributes (GL_SCISSOR_BIT).
1003  */
1004 struct gl_scissor_attrib
1005 {
1006    GLboolean Enabled;           /**< Scissor test enabled? */
1007    GLint X, Y;                  /**< Lower left corner of box */
1008    GLsizei Width, Height;       /**< Size of box */
1009 };
1010
1011
1012 /**
1013  * Stencil attribute group (GL_STENCIL_BUFFER_BIT).
1014  */
1015 struct gl_stencil_attrib
1016 {
1017    GLboolean Enabled;           /**< Enabled flag */
1018    GLboolean TestTwoSide;       /**< GL_EXT_stencil_two_side */
1019    GLubyte ActiveFace;          /**< GL_EXT_stencil_two_side (0 or 1) */
1020    GLboolean _TestTwoSide;
1021    GLenum Function[2];          /**< Stencil function */
1022    GLenum FailFunc[2];          /**< Fail function */
1023    GLenum ZPassFunc[2];         /**< Depth buffer pass function */
1024    GLenum ZFailFunc[2];         /**< Depth buffer fail function */
1025    GLint Ref[2];                /**< Reference value */
1026    GLuint ValueMask[2];         /**< Value mask */
1027    GLuint WriteMask[2];         /**< Write mask */
1028    GLuint Clear;                /**< Clear value */
1029 };
1030
1031
1032 #define NUM_TEXTURE_TARGETS 5   /* 1D, 2D, 3D, CUBE and RECT */
1033
1034 /**
1035  * An index for each type of texture object
1036  */
1037 /*@{*/
1038 #define TEXTURE_1D_INDEX    0
1039 #define TEXTURE_2D_INDEX    1
1040 #define TEXTURE_3D_INDEX    2
1041 #define TEXTURE_CUBE_INDEX  3
1042 #define TEXTURE_RECT_INDEX  4
1043 /*@}*/
1044
1045 /**
1046  * Bit flags for each type of texture object
1047  * Used for Texture.Unit[]._ReallyEnabled flags.
1048  */
1049 /*@{*/
1050 #define TEXTURE_1D_BIT   (1 << TEXTURE_1D_INDEX)
1051 #define TEXTURE_2D_BIT   (1 << TEXTURE_2D_INDEX)
1052 #define TEXTURE_3D_BIT   (1 << TEXTURE_3D_INDEX)
1053 #define TEXTURE_CUBE_BIT (1 << TEXTURE_CUBE_INDEX)
1054 #define TEXTURE_RECT_BIT (1 << TEXTURE_RECT_INDEX)
1055 /*@}*/
1056
1057
1058 /**
1059  * TexGenEnabled flags.
1060  */
1061 /*@{*/
1062 #define S_BIT 1
1063 #define T_BIT 2
1064 #define R_BIT 4
1065 #define Q_BIT 8
1066 /*@}*/
1067
1068
1069 /**
1070  * Bit flag versions of the corresponding GL_ constants.
1071  */
1072 /*@{*/
1073 #define TEXGEN_SPHERE_MAP        0x1
1074 #define TEXGEN_OBJ_LINEAR        0x2
1075 #define TEXGEN_EYE_LINEAR        0x4
1076 #define TEXGEN_REFLECTION_MAP_NV 0x8
1077 #define TEXGEN_NORMAL_MAP_NV     0x10
1078
1079 #define TEXGEN_NEED_NORMALS      (TEXGEN_SPHERE_MAP        | \
1080                                   TEXGEN_REFLECTION_MAP_NV | \
1081                                   TEXGEN_NORMAL_MAP_NV)
1082 #define TEXGEN_NEED_EYE_COORD    (TEXGEN_SPHERE_MAP        | \
1083                                   TEXGEN_REFLECTION_MAP_NV | \
1084                                   TEXGEN_NORMAL_MAP_NV     | \
1085                                   TEXGEN_EYE_LINEAR)
1086 /*@}*/
1087
1088
1089 /* A selection of state flags to make driver and module's lives easier. */
1090 #define ENABLE_TEXGEN0        0x1
1091 #define ENABLE_TEXGEN1        0x2
1092 #define ENABLE_TEXGEN2        0x4
1093 #define ENABLE_TEXGEN3        0x8
1094 #define ENABLE_TEXGEN4        0x10
1095 #define ENABLE_TEXGEN5        0x20
1096 #define ENABLE_TEXGEN6        0x40
1097 #define ENABLE_TEXGEN7        0x80
1098
1099 #define ENABLE_TEXMAT0        0x1       /* Ie. not the identity matrix */
1100 #define ENABLE_TEXMAT1        0x2
1101 #define ENABLE_TEXMAT2        0x4
1102 #define ENABLE_TEXMAT3        0x8
1103 #define ENABLE_TEXMAT4        0x10
1104 #define ENABLE_TEXMAT5        0x20
1105 #define ENABLE_TEXMAT6        0x40
1106 #define ENABLE_TEXMAT7        0x80
1107
1108 #define ENABLE_TEXGEN(i) (ENABLE_TEXGEN0 << (i))
1109 #define ENABLE_TEXMAT(i) (ENABLE_TEXMAT0 << (i))
1110
1111
1112 /**
1113  * Texel fetch function prototype.  We use texel fetch functions to
1114  * extract RGBA, color indexes and depth components out of 1D, 2D and 3D
1115  * texture images.  These functions help to isolate us from the gritty
1116  * details of all the various texture image encodings.
1117  *
1118  * \param texImage texture image.
1119  * \param col texel column.
1120  * \param row texel row.
1121  * \param img texel image level/layer.
1122  * \param texelOut output texel (up to 4 GLchans)
1123  */
1124 typedef void (*FetchTexelFuncC)( const struct gl_texture_image *texImage,
1125                                  GLint col, GLint row, GLint img,
1126                                  GLchan *texelOut );
1127
1128 /**
1129  * As above, but returns floats.
1130  * Used for depth component images and for upcoming signed/float
1131  * texture images.
1132  */
1133 typedef void (*FetchTexelFuncF)( const struct gl_texture_image *texImage,
1134                                  GLint col, GLint row, GLint img,
1135                                  GLfloat *texelOut );
1136
1137
1138 typedef void (*StoreTexelFunc)(struct gl_texture_image *texImage,
1139                                GLint col, GLint row, GLint img,
1140                                const void *texel);
1141
1142 /**
1143  * TexImage store function.  This is called by the glTex[Sub]Image
1144  * functions and is responsible for converting the user-specified texture
1145  * image into a specific (hardware) image format.
1146  */
1147 typedef GLboolean (*StoreTexImageFunc)(GLcontext *ctx, GLuint dims,
1148                           GLenum baseInternalFormat,
1149                           const struct gl_texture_format *dstFormat,
1150                           GLvoid *dstAddr,
1151                           GLint dstXoffset, GLint dstYoffset, GLint dstZoffset,
1152                           GLint dstRowStride, GLint dstImageStride,
1153                           GLint srcWidth, GLint srcHeight, GLint srcDepth,
1154                           GLenum srcFormat, GLenum srcType,
1155                           const GLvoid *srcAddr,
1156                           const struct gl_pixelstore_attrib *srcPacking);
1157
1158
1159
1160 /**
1161  * Texture format record
1162  */
1163 struct gl_texture_format
1164 {
1165    GLint MesaFormat;            /**< One of the MESA_FORMAT_* values */
1166
1167    GLenum BaseFormat;           /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1168                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1169                                  *   GL_INTENSITY, GL_COLOR_INDEX or
1170                                  *   GL_DEPTH_COMPONENT.
1171                                  */
1172    GLenum DataType;             /**< GL_FLOAT or GL_UNSIGNED_NORMALIZED_ARB */
1173    GLubyte RedBits;             /**< Bits per texel component */
1174    GLubyte GreenBits;           /**< These are just rough approximations for */
1175    GLubyte BlueBits;            /**< compressed texture formats. */
1176    GLubyte AlphaBits;
1177    GLubyte LuminanceBits;
1178    GLubyte IntensityBits;
1179    GLubyte IndexBits;
1180    GLubyte DepthBits;
1181    GLubyte StencilBits;         /**< GL_EXT_packed_depth_stencil */
1182
1183    GLuint TexelBytes;           /**< Bytes per texel, 0 if compressed format */
1184
1185    StoreTexImageFunc StoreImage;
1186
1187    /**
1188     * \name Texel fetch function pointers
1189     */
1190    /*@{*/
1191    FetchTexelFuncC FetchTexel1D;
1192    FetchTexelFuncC FetchTexel2D;
1193    FetchTexelFuncC FetchTexel3D;
1194    FetchTexelFuncF FetchTexel1Df;
1195    FetchTexelFuncF FetchTexel2Df;
1196    FetchTexelFuncF FetchTexel3Df;
1197    /*@}*/
1198
1199    StoreTexelFunc StoreTexel;
1200 };
1201
1202
1203 /**
1204  * Texture image state.  Describes the dimensions of a texture image,
1205  * the texel format and pointers to Texel Fetch functions.
1206  */
1207 struct gl_texture_image
1208 {
1209    GLenum _BaseFormat;          /**< Either GL_RGB, GL_RGBA, GL_ALPHA,
1210                                  *   GL_LUMINANCE, GL_LUMINANCE_ALPHA,
1211                                  *   GL_INTENSITY, GL_COLOR_INDEX,
1212                                  *   GL_DEPTH_COMPONENT or GL_DEPTH_STENCIL_EXT
1213                                  *   only. Used for choosing TexEnv arithmetic.
1214                                  */
1215    GLint InternalFormat;        /**< Internal format as given by the user */
1216    GLuint Border;               /**< 0 or 1 */
1217    GLuint Width;                /**< = 2^WidthLog2 + 2*Border */
1218    GLuint Height;               /**< = 2^HeightLog2 + 2*Border */
1219    GLuint Depth;                /**< = 2^DepthLog2 + 2*Border */
1220    GLuint RowStride;            /**< == Width unless IsClientData and padded */
1221    GLuint Width2;               /**< = Width - 2*Border */
1222    GLuint Height2;              /**< = Height - 2*Border */
1223    GLuint Depth2;               /**< = Depth - 2*Border */
1224    GLuint WidthLog2;            /**< = log2(Width2) */
1225    GLuint HeightLog2;           /**< = log2(Height2) */
1226    GLuint DepthLog2;            /**< = log2(Depth2) */
1227    GLuint MaxLog2;              /**< = MAX(WidthLog2, HeightLog2) */
1228    GLfloat WidthScale;          /**< used for mipmap LOD computation */
1229    GLfloat HeightScale;         /**< used for mipmap LOD computation */
1230    GLfloat DepthScale;          /**< used for mipmap LOD computation */
1231    GLvoid *Data;                /**< Image data, accessed via FetchTexel() */
1232    GLboolean IsClientData;      /**< Data owned by client? */
1233    GLboolean _IsPowerOfTwo;     /**< Are all dimensions powers of two? */
1234
1235    const struct gl_texture_format *TexFormat;
1236
1237    struct gl_texture_object *TexObject;  /**< Pointer back to parent object */
1238
1239    FetchTexelFuncC FetchTexelc; /**< GLchan texel fetch function pointer */
1240    FetchTexelFuncF FetchTexelf; /**< Float texel fetch function pointer */
1241
1242    GLboolean IsCompressed;      /**< GL_ARB_texture_compression */
1243    GLuint CompressedSize;       /**< GL_ARB_texture_compression */
1244
1245    /**
1246     * \name For device driver:
1247     */
1248    /*@{*/
1249    void *DriverData;            /**< Arbitrary device driver data */
1250    /*@}*/
1251 };
1252
1253
1254 /**
1255  * Indexes for cube map faces.
1256  */
1257 /*@{*/
1258 #define FACE_POS_X   0
1259 #define FACE_NEG_X   1
1260 #define FACE_POS_Y   2
1261 #define FACE_NEG_Y   3
1262 #define FACE_POS_Z   4
1263 #define FACE_NEG_Z   5
1264 #define MAX_FACES  6
1265 /*@}*/
1266
1267
1268 /**
1269  * Texture object state.  Contains the array of mipmap images, border color,
1270  * wrap modes, filter modes, shadow/texcompare state, and the per-texture
1271  * color palette.
1272  */
1273 struct gl_texture_object
1274 {
1275    _glthread_Mutex Mutex;       /**< for thread safety */
1276    GLint RefCount;              /**< reference count */
1277    GLuint Name;                 /**< the user-visible texture object ID */
1278    GLenum Target;               /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
1279    GLfloat Priority;            /**< in [0,1] */
1280    GLfloat BorderColor[4];      /**< unclamped */
1281    GLchan _BorderChan[4];       /**< clamped, as GLchan */
1282    GLenum WrapS;                /**< S-axis texture image wrap mode */
1283    GLenum WrapT;                /**< T-axis texture image wrap mode */
1284    GLenum WrapR;                /**< R-axis texture image wrap mode */
1285    GLenum MinFilter;            /**< minification filter */
1286    GLenum MagFilter;            /**< magnification filter */
1287    GLfloat MinLod;              /**< min lambda, OpenGL 1.2 */
1288    GLfloat MaxLod;              /**< max lambda, OpenGL 1.2 */
1289    GLfloat LodBias;             /**< OpenGL 1.4 */
1290    GLint BaseLevel;             /**< min mipmap level, OpenGL 1.2 */
1291    GLint MaxLevel;              /**< max mipmap level, OpenGL 1.2 */
1292    GLfloat MaxAnisotropy;       /**< GL_EXT_texture_filter_anisotropic */
1293    GLboolean CompareFlag;       /**< GL_SGIX_shadow */
1294    GLenum CompareOperator;      /**< GL_SGIX_shadow */
1295    GLfloat ShadowAmbient;       /**< GL_ARB_shadow_ambient */
1296    GLenum CompareMode;          /**< GL_ARB_shadow */
1297    GLenum CompareFunc;          /**< GL_ARB_shadow */
1298    GLenum DepthMode;            /**< GL_ARB_depth_texture */
1299    GLint _MaxLevel;             /**< actual max mipmap level (q in the spec) */
1300    GLfloat _MaxLambda;          /**< = _MaxLevel - BaseLevel (q - b in spec) */
1301    GLboolean GenerateMipmap;    /**< GL_SGIS_generate_mipmap */
1302    GLboolean _IsPowerOfTwo;     /**< Are all image dimensions powers of two? */
1303    GLboolean Complete;          /**< Is texture object complete? */
1304
1305    /** Actual texture images, indexed by [cube face] and [mipmap level] */
1306    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
1307
1308    /** GL_EXT_paletted_texture */
1309    struct gl_color_table Palette;
1310
1311
1312    /**
1313     * \name For device driver.
1314     * Note: instead of attaching driver data to this pointer, it's preferable
1315     * to instead use this struct as a base class for your own texture object
1316     * class.  Driver->NewTextureObject() can be used to implement the
1317     * allocation.
1318     */
1319    void *DriverData;    /**< Arbitrary device driver data */
1320 };
1321
1322
1323 /**
1324  * Texture combine environment state.
1325  *
1326  * \todo
1327  * If GL_NV_texture_env_combine4 is ever supported, the arrays in this
1328  * structure will need to be expanded for 4 elements.
1329  */
1330 struct gl_tex_env_combine_state
1331 {
1332    GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1333    GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
1334    GLenum SourceRGB[3];  /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1335    GLenum SourceA[3];    /**< GL_PRIMARY_COLOR, GL_TEXTURE, etc. */
1336    GLenum OperandRGB[3]; /**< SRC_COLOR, ONE_MINUS_SRC_COLOR, etc */
1337    GLenum OperandA[3];   /**< SRC_ALPHA, ONE_MINUS_SRC_ALPHA, etc */
1338    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
1339    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
1340    GLuint _NumArgsRGB;   /**< Number of inputs used for the combine mode. */
1341    GLuint _NumArgsA;     /**< Number of inputs used for the combine mode. */
1342 };
1343
1344
1345 /**
1346  * Texture unit state.  Contains enable flags, texture environment/function/
1347  * combiners, texgen state, pointers to current texture objects and
1348  * post-filter color tables.
1349  */
1350 struct gl_texture_unit
1351 {
1352    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
1353    GLbitfield _ReallyEnabled;   /**< 0 or exactly one of TEXTURE_*_BIT flags */
1354
1355    GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
1356    GLfloat EnvColor[4];
1357    GLbitfield TexGenEnabled;    /**< Bitwise-OR of [STRQ]_BIT values */
1358    /** \name Tex coord generation mode
1359     * Either GL_OBJECT_LINEAR, GL_EYE_LINEAR or GL_SPHERE_MAP. */
1360    /*@{*/
1361    GLenum GenModeS;
1362    GLenum GenModeT;
1363    GLenum GenModeR;
1364    GLenum GenModeQ;
1365    /*@}*/
1366    GLbitfield _GenBitS;
1367    GLbitfield _GenBitT;
1368    GLbitfield _GenBitR;
1369    GLbitfield _GenBitQ;
1370    GLbitfield _GenFlags;        /**< bitwise or of GenBit[STRQ] */
1371    GLfloat ObjectPlaneS[4];
1372    GLfloat ObjectPlaneT[4];
1373    GLfloat ObjectPlaneR[4];
1374    GLfloat ObjectPlaneQ[4];
1375    GLfloat EyePlaneS[4];
1376    GLfloat EyePlaneT[4];
1377    GLfloat EyePlaneR[4];
1378    GLfloat EyePlaneQ[4];
1379    GLfloat LodBias;             /**< for biasing mipmap levels */
1380
1381    /**
1382     * \name GL_EXT_texture_env_combine
1383     */
1384    struct gl_tex_env_combine_state Combine;
1385
1386    /**
1387     * Derived state based on \c EnvMode and the \c BaseFormat of the
1388     * currently enabled texture.
1389     */
1390    struct gl_tex_env_combine_state _EnvMode;
1391
1392    /**
1393     * Currently enabled combiner state.  This will point to either
1394     * \c Combine or \c _EnvMode.
1395     */
1396    struct gl_tex_env_combine_state *_CurrentCombine;
1397
1398    struct gl_texture_object *Current1D;
1399    struct gl_texture_object *Current2D;
1400    struct gl_texture_object *Current3D;
1401    struct gl_texture_object *CurrentCubeMap; /**< GL_ARB_texture_cube_map */
1402    struct gl_texture_object *CurrentRect;    /**< GL_NV_texture_rectangle */
1403
1404    struct gl_texture_object *_Current; /**< Points to really enabled tex obj */
1405
1406    struct gl_texture_object Saved1D;  /**< only used by glPush/PopAttrib */
1407    struct gl_texture_object Saved2D;
1408    struct gl_texture_object Saved3D;
1409    struct gl_texture_object SavedCubeMap;
1410    struct gl_texture_object SavedRect;
1411
1412    /* GL_SGI_texture_color_table */
1413    struct gl_color_table ColorTable;
1414    struct gl_color_table ProxyColorTable;
1415    GLboolean ColorTableEnabled;
1416 };
1417
1418 struct texenvprog_cache {
1419    GLuint hash;
1420    void *key;
1421    void *data;
1422    struct texenvprog_cache *next;
1423 };
1424
1425 /**
1426  * Texture attribute group (GL_TEXTURE_BIT).
1427  */
1428 struct gl_texture_attrib
1429 {
1430    /**
1431     * name multitexture
1432     */
1433    /**@{*/
1434    GLuint CurrentUnit;         /**< Active texture unit */
1435    GLbitfield _EnabledUnits;  /**< one bit set for each really-enabled unit */
1436    GLbitfield _EnabledCoordUnits;   /**< one bit per enabled coordinate unit */
1437    GLbitfield _GenFlags;            /**< for texgen */
1438    GLbitfield _TexGenEnabled;
1439    GLbitfield _TexMatEnabled;
1440    /**@}*/
1441
1442    struct gl_texture_unit Unit[MAX_TEXTURE_UNITS];
1443
1444    struct gl_texture_object *Proxy1D;
1445    struct gl_texture_object *Proxy2D;
1446    struct gl_texture_object *Proxy3D;
1447    struct gl_texture_object *ProxyCubeMap;
1448    struct gl_texture_object *ProxyRect;
1449
1450    /** GL_EXT_shared_texture_palette */
1451    GLboolean SharedPalette;
1452    struct gl_color_table Palette;
1453
1454    /** Cached texenv fragment programs */
1455    struct texenvprog_cache *env_fp_cache;
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  * Node for the attribute stack.
1492  */
1493 struct gl_attrib_node
1494 {
1495    GLbitfield kind;
1496    void *data;
1497    struct gl_attrib_node *next;
1498 };
1499
1500
1501 /**
1502  * GL_ARB_vertex/pixel_buffer_object buffer object
1503  */
1504 struct gl_buffer_object
1505 {
1506    GLint RefCount;
1507    GLuint Name;
1508    GLenum Usage;
1509    GLenum Access;
1510    GLvoid *Pointer;          /**< Only valid while buffer is mapped */
1511    GLsizeiptrARB Size;       /**< Size of storage in bytes */
1512    GLubyte *Data;            /**< Location of storage either in RAM or VRAM. */
1513    GLboolean OnCard;         /**< Is buffer in VRAM? (hardware drivers) */
1514 };
1515
1516
1517
1518 /**
1519  * Client pixel packing/unpacking attributes
1520  */
1521 struct gl_pixelstore_attrib
1522 {
1523    GLint Alignment;
1524    GLint RowLength;
1525    GLint SkipPixels;
1526    GLint SkipRows;
1527    GLint ImageHeight;     /**< for GL_EXT_texture3D */
1528    GLint SkipImages;      /**< for GL_EXT_texture3D */
1529    GLboolean SwapBytes;
1530    GLboolean LsbFirst;
1531    GLboolean ClientStorage; /**< GL_APPLE_client_storage */
1532    GLboolean Invert;        /**< GL_MESA_pack_invert */
1533    struct gl_buffer_object *BufferObj; /**< GL_ARB_pixel_buffer_object */
1534 };
1535
1536
1537 #define CA_CLIENT_DATA     0x1  /**< Data not allocated by mesa */
1538
1539
1540 /**
1541  * Client vertex array attributes
1542  */
1543 struct gl_client_array
1544 {
1545    GLint Size;                  /**< components per element (1,2,3,4) */
1546    GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
1547    GLsizei Stride;              /**< user-specified stride */
1548    GLsizei StrideB;             /**< actual stride in bytes */
1549    const GLubyte *Ptr;          /**< Points to array data */
1550    GLbitfield Enabled;          /**< one of the _NEW_ARRAY_ bits */
1551    GLboolean Normalized;        /**< GL_ARB_vertex_program */
1552
1553    /**< GL_ARB_vertex_buffer_object */
1554    struct gl_buffer_object *BufferObj;
1555    GLuint _MaxElement;
1556
1557    GLbitfield Flags;
1558 };
1559
1560
1561 /**
1562  * Vertex array state
1563  */
1564 struct gl_array_attrib
1565 {
1566    struct gl_client_array Vertex;            /**< client data descriptors */
1567    struct gl_client_array Normal;
1568    struct gl_client_array Color;
1569    struct gl_client_array SecondaryColor;
1570    struct gl_client_array FogCoord;
1571    struct gl_client_array Index;
1572    struct gl_client_array TexCoord[MAX_TEXTURE_COORD_UNITS];
1573    struct gl_client_array EdgeFlag;
1574
1575    struct gl_client_array VertexAttrib[VERT_ATTRIB_MAX];  /**< GL_NV_vertex_program */
1576
1577    GLint ActiveTexture;         /**< Client Active Texture */
1578    GLuint LockFirst;            /**< GL_EXT_compiled_vertex_array */
1579    GLuint LockCount;            /**< GL_EXT_compiled_vertex_array */
1580
1581    GLbitfield _Enabled;         /**< _NEW_ARRAY_* - bit set if array enabled */
1582    GLbitfield NewState;         /**< _NEW_ARRAY_* */
1583
1584 #if FEATURE_ARB_vertex_buffer_object
1585    struct gl_buffer_object *NullBufferObj;
1586    struct gl_buffer_object *ArrayBufferObj;
1587    struct gl_buffer_object *ElementArrayBufferObj;
1588 #endif
1589    GLuint _MaxElement;          /* Min of all enabled array's maxes */
1590 };
1591
1592
1593 /**
1594  * Feedback buffer state
1595  */
1596 struct gl_feedback
1597 {
1598    GLenum Type;
1599    GLbitfield _Mask;            /* FB_* bits */
1600    GLfloat *Buffer;
1601    GLuint BufferSize;
1602    GLuint Count;
1603 };
1604
1605
1606 /**
1607  * Selection buffer state
1608  */
1609 struct gl_selection
1610 {
1611    GLuint *Buffer;      /**< selection buffer */
1612    GLuint BufferSize;   /**< size of the selection buffer */
1613    GLuint BufferCount;  /**< number of values in the selection buffer */
1614    GLuint Hits;         /**< number of records in the selection buffer */
1615    GLuint NameStackDepth; /**< name stack depth */
1616    GLuint NameStack[MAX_NAME_STACK_DEPTH]; /**< name stack */
1617    GLboolean HitFlag;   /**< hit flag */
1618    GLfloat HitMinZ;     /**< minimum hit depth */
1619    GLfloat HitMaxZ;     /**< maximum hit depth */
1620 };
1621
1622
1623 /**
1624  * 1-D Evaluator control points
1625  */
1626 struct gl_1d_map
1627 {
1628    GLuint Order;        /**< Number of control points */
1629    GLfloat u1, u2, du;  /**< u1, u2, 1.0/(u2-u1) */
1630    GLfloat *Points;     /**< Points to contiguous control points */
1631 };
1632
1633
1634 /**
1635  * 2-D Evaluator control points
1636  */
1637 struct gl_2d_map
1638 {
1639    GLuint Uorder;               /**< Number of control points in U dimension */
1640    GLuint Vorder;               /**< Number of control points in V dimension */
1641    GLfloat u1, u2, du;
1642    GLfloat v1, v2, dv;
1643    GLfloat *Points;             /**< Points to contiguous control points */
1644 };
1645
1646
1647 /**
1648  * All evaluator control point state
1649  */
1650 struct gl_evaluators
1651 {
1652    /**
1653     * \name 1-D maps
1654     */
1655    /*@{*/
1656    struct gl_1d_map Map1Vertex3;
1657    struct gl_1d_map Map1Vertex4;
1658    struct gl_1d_map Map1Index;
1659    struct gl_1d_map Map1Color4;
1660    struct gl_1d_map Map1Normal;
1661    struct gl_1d_map Map1Texture1;
1662    struct gl_1d_map Map1Texture2;
1663    struct gl_1d_map Map1Texture3;
1664    struct gl_1d_map Map1Texture4;
1665    struct gl_1d_map Map1Attrib[16];  /**< GL_NV_vertex_program */
1666    /*@}*/
1667
1668    /**
1669     * \name 2-D maps
1670     */
1671    /*@{*/
1672    struct gl_2d_map Map2Vertex3;
1673    struct gl_2d_map Map2Vertex4;
1674    struct gl_2d_map Map2Index;
1675    struct gl_2d_map Map2Color4;
1676    struct gl_2d_map Map2Normal;
1677    struct gl_2d_map Map2Texture1;
1678    struct gl_2d_map Map2Texture2;
1679    struct gl_2d_map Map2Texture3;
1680    struct gl_2d_map Map2Texture4;
1681    struct gl_2d_map Map2Attrib[16];  /**< GL_NV_vertex_program */
1682    /*@}*/
1683 };
1684
1685
1686 /**
1687  * NV_fragment_program runtime state
1688  */
1689 struct fp_machine
1690 {
1691    GLfloat Temporaries[MAX_NV_FRAGMENT_PROGRAM_TEMPS][4];
1692    GLfloat Inputs[MAX_NV_FRAGMENT_PROGRAM_INPUTS][4];
1693    GLfloat Outputs[MAX_NV_FRAGMENT_PROGRAM_OUTPUTS][4];
1694    GLuint CondCodes[4];
1695 };
1696
1697 /**
1698  * ATI_fragment_shader runtime state
1699  */
1700 #define ATI_FS_INPUT_PRIMARY 0
1701 #define ATI_FS_INPUT_SECONDARY 1
1702
1703 /* 6 register sets - 2 inputs (primary, secondary) */
1704 struct atifs_machine
1705 {
1706    GLfloat Registers[6][4];
1707    GLfloat PrevPassRegisters[6][4];
1708    GLfloat Inputs[2][4];
1709    GLuint pass;
1710 };
1711
1712
1713 /**
1714  * Names of the various vertex/fragment register files
1715  */
1716 enum register_file
1717 {
1718    PROGRAM_TEMPORARY,
1719    PROGRAM_INPUT,
1720    PROGRAM_OUTPUT,
1721    PROGRAM_LOCAL_PARAM,
1722    PROGRAM_ENV_PARAM,
1723    PROGRAM_NAMED_PARAM,
1724    PROGRAM_STATE_VAR,
1725    PROGRAM_WRITE_ONLY,
1726    PROGRAM_ADDRESS,
1727    PROGRAM_UNDEFINED   /* invalid value */
1728 };
1729
1730
1731 /** Vertex and fragment instructions */
1732 struct vp_instruction;
1733 struct fp_instruction;
1734 struct atifs_instruction;
1735 struct atifs_setupinst;
1736 struct program_parameter_list;
1737
1738
1739 /**
1740  * Base class for any kind of program object
1741  */
1742 struct program
1743 {
1744    GLuint Id;
1745    GLubyte *String;          /**< Null-terminated program text */
1746    GLint RefCount;
1747    GLenum Target;
1748    GLenum Format;            /**< String encoding format */
1749    GLboolean Resident;
1750    GLfloat LocalParams[MAX_PROGRAM_LOCAL_PARAMS][4];
1751    GLuint NumInstructions;  /* GL_ARB_vertex/fragment_program */
1752    GLuint NumTemporaries;
1753    GLuint NumParameters;
1754    GLuint NumAttributes;
1755    GLuint NumAddressRegs;
1756 };
1757
1758
1759 /** Vertex program object */
1760 struct vertex_program
1761 {
1762    struct program Base;   /* base class */
1763    struct vp_instruction *Instructions;  /* Compiled instructions */
1764    GLboolean IsNVProgram; /* GL_NV_vertex_program ? */
1765    GLboolean IsPositionInvariant;  /* GL_NV_vertex_program1_1 */
1766    GLbitfield InputsRead;     /* Bitmask of which input regs are read */
1767    GLbitfield OutputsWritten; /* Bitmask of which output regs are written to */
1768    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1769    void *TnlData;               /* should probably use Base.DriverData */
1770 };
1771
1772
1773 /** Fragment program object */
1774 struct fragment_program
1775 {
1776    struct program Base;   /**< base class */
1777    struct fp_instruction *Instructions;  /**< Compiled instructions */
1778    GLbitfield InputsRead;     /**< Bitmask of which input regs are read */
1779    GLbitfield OutputsWritten; /**< Bitmask of which output regs are written to */
1780    GLbitfield TexturesUsed[MAX_TEXTURE_IMAGE_UNITS];  /**< TEXTURE_x_INDEX bitmask */
1781    GLuint NumAluInstructions; /**< GL_ARB_fragment_program */
1782    GLuint NumTexInstructions;
1783    GLuint NumTexIndirections;
1784    GLenum FogOption;
1785    struct program_parameter_list *Parameters; /**< array [NumParameters] */
1786
1787 #ifdef USE_TCC
1788    char c_str[4096];            /* experimental... */
1789    int c_strlen;
1790 #endif
1791 };
1792
1793 struct ati_fragment_shader
1794 {
1795    struct program Base;
1796    struct atifs_instruction *Instructions[2];
1797    struct atifs_setupinst *SetupInst[2];
1798    GLfloat Constants[8][4];
1799    GLuint localConstDef;
1800    GLubyte numArithInstr[2];
1801    GLubyte regsAssigned[2];
1802    GLubyte NumPasses;
1803    GLubyte cur_pass;
1804    GLubyte last_optype;
1805    GLboolean interpinp1;
1806    GLboolean isValid;
1807    GLuint swizzlerq;
1808 };
1809
1810 /**
1811  * State common to vertex and fragment programs.
1812  */
1813 struct gl_program_state
1814 {
1815    GLint ErrorPos;                       /* GL_PROGRAM_ERROR_POSITION_NV */
1816    const char *ErrorString;              /* GL_PROGRAM_ERROR_STRING_NV */
1817 };
1818
1819
1820 /**
1821  * State vars for GL_ARB/GL_NV_vertex_program
1822  */
1823 struct gl_vertex_program_state
1824 {
1825    GLboolean Enabled;                  /**< GL_VERTEX_PROGRAM_NV */
1826    GLboolean _Enabled;                 /**< Really enabled? */
1827    GLboolean PointSizeEnabled;         /**< GL_VERTEX_PROGRAM_POINT_SIZE_NV */
1828    GLboolean TwoSideEnabled;           /**< GL_VERTEX_PROGRAM_TWO_SIDE_NV */
1829    struct vertex_program *Current;     /**< ptr to currently bound program */
1830
1831    GLenum TrackMatrix[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1832    GLenum TrackMatrixTransform[MAX_NV_VERTEX_PROGRAM_PARAMS / 4];
1833
1834    GLfloat Parameters[MAX_NV_VERTEX_PROGRAM_PARAMS][4]; /* Env params */
1835    /* Only used during program execution (may be moved someday): */
1836    GLfloat Temporaries[MAX_NV_VERTEX_PROGRAM_TEMPS][4];
1837    GLfloat Inputs[MAX_NV_VERTEX_PROGRAM_INPUTS][4];
1838    GLuint InputsSize[MAX_NV_VERTEX_PROGRAM_INPUTS];
1839    GLfloat Outputs[MAX_NV_VERTEX_PROGRAM_OUTPUTS][4];
1840    GLint AddressReg[4];
1841
1842 #if FEATURE_MESA_program_debug
1843    GLprogramcallbackMESA Callback;
1844    GLvoid *CallbackData;
1845    GLboolean CallbackEnabled;
1846    GLuint CurrentPosition;
1847 #endif
1848 };
1849
1850
1851 /**
1852  * State for GL_ARB/NV_fragment_program
1853  */
1854 struct gl_fragment_program_state
1855 {
1856    GLboolean Enabled;                    /* GL_VERTEX_PROGRAM_NV */
1857    GLboolean _Enabled;                   /* Really enabled? */
1858    GLboolean _Active;                    /* Really really enabled? */
1859    struct fragment_program *Current;     /* ptr to currently bound program */
1860    struct fragment_program *_Current;    /* ptr to currently active program */
1861    struct fp_machine Machine;            /* machine state */
1862    GLfloat Parameters[MAX_NV_FRAGMENT_PROGRAM_PARAMS][4]; /* Env params */
1863
1864 #if FEATURE_MESA_program_debug
1865    GLprogramcallbackMESA Callback;
1866    GLvoid *CallbackData;
1867    GLboolean CallbackEnabled;
1868    GLuint CurrentPosition;
1869 #endif
1870 };
1871
1872
1873 /**
1874  * State for GL_ATI_fragment_shader
1875  */
1876 struct gl_ati_fragment_shader_state
1877 {
1878    GLboolean Enabled;
1879    GLboolean _Enabled;
1880    GLboolean Compiling;
1881    GLfloat globalConstants[8][4];
1882    struct atifs_machine Machine;            /* machine state */
1883    struct ati_fragment_shader *Current;
1884 };
1885
1886
1887 struct gl_query_object
1888 {
1889    GLuint Id;
1890    GLuint Result;      /* the counter */
1891    GLboolean Active;   /* inside Begin/EndQuery */
1892    GLboolean Ready;    /* result is ready */
1893 };
1894
1895
1896 struct gl_query_state
1897 {
1898    struct _mesa_HashTable *QueryObjects;
1899    struct gl_query_object *CurrentOcclusionObject; /* GL_ARB_occlusion_query */
1900    struct gl_query_object *CurrentTimerObject;     /* GL_EXT_timer_query */
1901 };
1902
1903
1904 /**
1905  * gl2 unique interface identifier.
1906  * Each gl2 interface has its own interface id used for object queries.
1907  */
1908 enum gl2_uiid
1909 {
1910    UIID_UNKNOWN,                /* supported by all objects */
1911    UIID_GENERIC,                /* generic object */
1912    UIID_CONTAINER,              /* contains generic objects */
1913    UIID_SHADER,                 /* shader object */
1914    UIID_FRAGMENT_SHADER,        /* fragment shader */
1915    UIID_VERTEX_SHADER,          /* vertex shader */
1916    UIID_PROGRAM,                /* program object */
1917    UIID_3DLABS_SHHANDLE         /* encapsulates 3dlabs' ShHandle */
1918 };
1919
1920 struct gl2_unknown_intf
1921 {
1922    GLvoid (* AddRef) (struct gl2_unknown_intf **);
1923    GLvoid (* Release) (struct gl2_unknown_intf **);
1924    struct gl2_unknown_intf **(* QueryInterface) (struct gl2_unknown_intf **, enum gl2_uiid uiid);
1925 };
1926
1927 struct gl2_generic_intf
1928 {
1929    struct gl2_unknown_intf _unknown;
1930    GLvoid (* Delete) (struct gl2_generic_intf **);
1931    GLenum (* GetType) (struct gl2_generic_intf **);
1932    GLhandleARB (* GetName) (struct gl2_generic_intf **);
1933    GLboolean (* GetDeleteStatus) (struct gl2_generic_intf **);
1934    const GLcharARB *(* GetInfoLog) (struct gl2_generic_intf **);
1935 };
1936
1937 struct gl2_container_intf
1938 {
1939    struct gl2_generic_intf _generic;
1940    GLboolean (* Attach) (struct gl2_container_intf **, struct gl2_generic_intf **);
1941    GLboolean (* Detach) (struct gl2_container_intf **, struct gl2_generic_intf **);
1942    GLsizei (* GetAttachedCount) (struct gl2_container_intf **);
1943    struct gl2_generic_intf **(* GetAttached) (struct gl2_container_intf **, GLuint);
1944 };
1945
1946 struct gl2_shader_intf
1947 {
1948    struct gl2_generic_intf _generic;
1949    GLenum (* GetSubType) (struct gl2_shader_intf **);
1950    GLboolean (* GetCompileStatus) (struct gl2_shader_intf **);
1951    GLvoid (* SetSource) (struct gl2_shader_intf **, GLcharARB *, GLint *, GLsizei);
1952    const GLcharARB *(* GetSource) (struct gl2_shader_intf **);
1953    GLvoid (* Compile) (struct gl2_shader_intf **);
1954 };
1955
1956 struct gl2_program_intf
1957 {
1958    struct gl2_container_intf _container;
1959    GLboolean (* GetLinkStatus) (struct gl2_program_intf **);
1960    GLboolean (* GetValidateStatus) (struct gl2_program_intf **);
1961    GLvoid (* Link) (struct gl2_program_intf **);
1962    GLvoid (* Validate) (struct gl2_program_intf **);
1963 };
1964
1965 struct gl2_fragment_shader_intf
1966 {
1967    struct gl2_shader_intf _shader;
1968 };
1969
1970 struct gl2_vertex_shader_intf
1971 {
1972    struct gl2_shader_intf _shader;
1973 };
1974
1975 struct gl2_3dlabs_shhandle_intf
1976 {
1977    struct gl2_unknown_intf _unknown;
1978    GLvoid *(* GetShHandle) (struct gl2_3dlabs_shhandle_intf **);
1979 };
1980
1981 struct gl_shader_objects_state
1982 {
1983    struct gl2_program_intf **current_program;
1984 };
1985
1986
1987 /**
1988  * State which can be shared by multiple contexts:
1989  */
1990 struct gl_shared_state
1991 {
1992    _glthread_Mutex Mutex;                  /**< for thread safety */
1993    GLint RefCount;                         /**< Reference count */
1994    struct _mesa_HashTable *DisplayList;    /**< Display lists hash table */
1995    struct _mesa_HashTable *TexObjects;     /**< Texture objects hash table */
1996
1997    /**
1998     * \name Default texture objects (shared by all multi-texture units)
1999     */
2000    /*@{*/
2001    struct gl_texture_object *Default1D;
2002    struct gl_texture_object *Default2D;
2003    struct gl_texture_object *Default3D;
2004    struct gl_texture_object *DefaultCubeMap;
2005    struct gl_texture_object *DefaultRect;
2006    /*@}*/
2007
2008    /**
2009     * \name Vertex/fragment programs
2010     */
2011    /*@{*/
2012    struct _mesa_HashTable *Programs;
2013 #if FEATURE_ARB_vertex_program
2014    struct program *DefaultVertexProgram;
2015 #endif
2016 #if FEATURE_ARB_fragment_program
2017    struct program *DefaultFragmentProgram;
2018 #endif
2019 #if FEATURE_ATI_fragment_shader
2020    struct program *DefaultFragmentShader;
2021 #endif
2022    /*@}*/
2023
2024 #if FEATURE_ARB_vertex_buffer_object || FEATURE_ARB_pixel_buffer_object
2025    struct _mesa_HashTable *BufferObjects;
2026 #endif
2027
2028    struct _mesa_HashTable *GL2Objects;
2029
2030 #if FEATURE_EXT_framebuffer_object
2031    struct _mesa_HashTable *RenderBuffers;
2032    struct _mesa_HashTable *FrameBuffers;
2033 #endif
2034
2035    void *DriverData;  /**< Device driver shared state */
2036 };
2037
2038
2039
2040
2041 /**
2042  * A renderbuffer stores colors or depth values or stencil values.
2043  * A framebuffer object will have a collection of these.
2044  * Data are read/written to the buffer with a handful of Get/Put functions.
2045  *
2046  * Instances of this object are allocated with the Driver's NewRenderbuffer
2047  * hook.  Drivers will likely wrap this class inside a driver-specific
2048  * class to simulate inheritance.
2049  */
2050 struct gl_renderbuffer
2051 {
2052    GLuint Name;
2053    GLint RefCount;
2054    GLuint Width, Height;
2055    GLenum InternalFormat; /* The user-specified value */
2056    GLenum _BaseFormat;    /* Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or */
2057                           /* GL_STENCIL_INDEX. */
2058    GLenum DataType;       /* Type of values passed to the Get/Put functions */
2059    GLubyte RedBits;       /**< Bits per image component */
2060    GLubyte GreenBits;
2061    GLubyte BlueBits;
2062    GLubyte AlphaBits;
2063    GLubyte IndexBits;
2064    GLubyte DepthBits;
2065    GLubyte StencilBits;
2066    GLvoid *Data;
2067
2068    /* Used to wrap one renderbuffer around another: */
2069    struct gl_renderbuffer *Wrapped;
2070
2071    /* Delete this renderbuffer */
2072    void (*Delete)(struct gl_renderbuffer *rb);
2073
2074    /* Allocate new storage for this renderbuffer */
2075    GLboolean (*AllocStorage)(GLcontext *ctx, struct gl_renderbuffer *rb,
2076                              GLenum internalFormat,
2077                              GLuint width, GLuint height);
2078
2079    /* Lock/Unlock are called before/after calling the Get/Put functions.
2080     * Not sure this is the right place for these yet.
2081    void (*Lock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2082    void (*Unlock)(GLcontext *ctx, struct gl_renderbuffer *rb);
2083     */
2084
2085    /* Return a pointer to the element/pixel at (x,y).
2086     * Should return NULL if the buffer memory can't be directly addressed.
2087     */
2088    void *(*GetPointer)(GLcontext *ctx, struct gl_renderbuffer *rb,
2089                        GLint x, GLint y);
2090
2091    /* Get/Read a row of values.
2092     * The values will be of format _BaseFormat and type DataType.
2093     */
2094    void (*GetRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2095                   GLint x, GLint y, void *values);
2096
2097    /* Get/Read values at arbitrary locations.
2098     * The values will be of format _BaseFormat and type DataType.
2099     */
2100    void (*GetValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2101                      const GLint x[], const GLint y[], void *values);
2102
2103    /* Put/Write a row of values.
2104     * The values will be of format _BaseFormat and type DataType.
2105     */
2106    void (*PutRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2107                   GLint x, GLint y, const void *values, const GLubyte *mask);
2108
2109    /* Put/Write a row of RGB values.  This is a special-case routine that's
2110     * only used for RGBA renderbuffers when the source data is GL_RGB. That's
2111     * a common case for glDrawPixels and some triangle routines.
2112     * The values will be of format GL_RGB and type DataType.
2113     */
2114    void (*PutRowRGB)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2115                     GLint x, GLint y, const void *values, const GLubyte *mask);
2116
2117
2118    /* Put/Write a row of identical values.
2119     * The values will be of format _BaseFormat and type DataType.
2120     */
2121    void (*PutMonoRow)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2122                      GLint x, GLint y, const void *value, const GLubyte *mask);
2123
2124    /* Put/Write values at arbitrary locations.
2125     * The values will be of format _BaseFormat and type DataType.
2126     */
2127    void (*PutValues)(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count,
2128                      const GLint x[], const GLint y[], const void *values,
2129                      const GLubyte *mask);
2130    /* Put/Write identical values at arbitrary locations.
2131     * The values will be of format _BaseFormat and type DataType.
2132     */
2133    void (*PutMonoValues)(GLcontext *ctx, struct gl_renderbuffer *rb,
2134                          GLuint count, const GLint x[], const GLint y[],
2135                          const void *value, const GLubyte *mask);
2136 };
2137
2138
2139 /**
2140  * A renderbuffer attachment point points to either a texture object
2141  * (and specifies a mipmap level, cube face or 3D texture slice) or
2142  * points to a renderbuffer.
2143  */
2144 struct gl_renderbuffer_attachment
2145 {
2146    GLenum Type;  /* GL_NONE or GL_TEXTURE or GL_RENDERBUFFER_EXT */
2147    GLboolean Complete;
2148
2149    /* IF Type == GL_RENDERBUFFER_EXT: */
2150    struct gl_renderbuffer *Renderbuffer;
2151
2152    /* IF Type == GL_TEXTURE: */
2153    struct gl_texture_object *Texture;
2154    GLuint TextureLevel;
2155    GLuint CubeMapFace;  /* 0 .. 5, for cube map textures */
2156    GLuint Zoffset;      /* for 3D textures */
2157 };
2158
2159
2160 /**
2161  * A framebuffer is a collection of renderbuffers (color, depth, stencil, etc).
2162  * In C++ terms, think of this as a base class from which device drivers
2163  * will make derived classes.
2164  */
2165 struct gl_framebuffer
2166 {
2167    GLuint Name;      /* if zero, this is a window system framebuffer */
2168    GLint RefCount;
2169
2170    GLvisual Visual;             /**< The corresponding visual */
2171
2172    GLboolean Initialized;
2173
2174    GLuint Width, Height;        /**< size of frame buffer in pixels */
2175
2176    /** \name  Drawing bounds (Intersection of buffer size and scissor box) */
2177    /*@{*/
2178    GLint _Xmin, _Xmax;  /**< inclusive */
2179    GLint _Ymin, _Ymax;  /**< exclusive */
2180    /*@}*/
2181
2182    /** \name  Derived Z buffer stuff */
2183    /*@{*/
2184    GLuint _DepthMax;    /**< Max depth buffer value */
2185    GLfloat _DepthMaxF;  /**< Float max depth buffer value */
2186    GLfloat _MRD;        /**< minimum resolvable difference in Z values */
2187    /*@}*/
2188
2189    GLenum _Status; /* One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
2190
2191    /* Array of all renderbuffer attachments, indexed by BUFFER_* tokens. */
2192    struct gl_renderbuffer_attachment Attachment[BUFFER_COUNT];
2193
2194    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
2195     * attribute group and GL_PIXEL attribute group, respectively.
2196     */
2197    GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
2198    GLenum ColorReadBuffer;
2199
2200    /* These are computed from ColorDrawBuffer and ColorReadBuffer */
2201    GLbitfield _ColorDrawBufferMask[MAX_DRAW_BUFFERS]; /* Mask of BUFFER_BIT_* flags */
2202    GLint _ColorReadBufferIndex; /* -1 = None */
2203
2204    /* These are computed from _ColorDrawBufferMask and _ColorReadBufferIndex */
2205    GLuint _NumColorDrawBuffers[MAX_DRAW_BUFFERS];
2206    struct gl_renderbuffer *_ColorDrawBuffers[MAX_DRAW_BUFFERS][4];
2207    struct gl_renderbuffer *_ColorReadBuffer;
2208
2209    /** Delete this framebuffer */
2210    void (*Delete)(struct gl_framebuffer *fb);
2211 };
2212
2213
2214 /**
2215  * Constants which may be overridden by device driver during context creation
2216  * but are never changed after that.
2217  */
2218 struct gl_constants
2219 {
2220    GLint MaxTextureLevels;              /**< Maximum number of allowed mipmap levels. */
2221    GLint Max3DTextureLevels;            /**< Maximum number of allowed mipmap levels for 3D texture targets. */
2222    GLint MaxCubeTextureLevels;          /**< Maximum number of allowed mipmap levels for GL_ARB_texture_cube_map */
2223    GLint MaxTextureRectSize;            /* GL_NV_texture_rectangle */
2224    GLuint MaxTextureCoordUnits;
2225    GLuint MaxTextureImageUnits;
2226    GLuint MaxTextureUnits;              /* = MAX(CoordUnits, ImageUnits) */
2227    GLfloat MaxTextureMaxAnisotropy;     /* GL_EXT_texture_filter_anisotropic */
2228    GLfloat MaxTextureLodBias;           /* GL_EXT_texture_lod_bias */
2229    GLuint MaxArrayLockSize;
2230    GLint SubPixelBits;
2231    GLfloat MinPointSize, MaxPointSize;          /* aliased */
2232    GLfloat MinPointSizeAA, MaxPointSizeAA;      /* antialiased */
2233    GLfloat PointSizeGranularity;
2234    GLfloat MinLineWidth, MaxLineWidth;          /* aliased */
2235    GLfloat MinLineWidthAA, MaxLineWidthAA;      /* antialiased */
2236    GLfloat LineWidthGranularity;
2237    GLuint MaxColorTableSize;
2238    GLuint MaxConvolutionWidth;
2239    GLuint MaxConvolutionHeight;
2240    GLuint MaxClipPlanes;
2241    GLuint MaxLights;
2242    GLfloat MaxShininess;                        /* GL_NV_light_max_exponent */
2243    GLfloat MaxSpotExponent;                     /* GL_NV_light_max_exponent */
2244    GLuint MaxViewportWidth, MaxViewportHeight;
2245    /* GL_ARB_vertex_program */
2246    GLuint MaxVertexProgramInstructions;
2247    GLuint MaxVertexProgramAttribs;
2248    GLuint MaxVertexProgramTemps;
2249    GLuint MaxVertexProgramLocalParams;
2250    GLuint MaxVertexProgramEnvParams;
2251    GLuint MaxVertexProgramAddressRegs;
2252    /* GL_ARB_fragment_program */
2253    GLuint MaxFragmentProgramInstructions;
2254    GLuint MaxFragmentProgramAttribs;
2255    GLuint MaxFragmentProgramTemps;
2256    GLuint MaxFragmentProgramLocalParams;
2257    GLuint MaxFragmentProgramEnvParams;
2258    GLuint MaxFragmentProgramAddressRegs;
2259    GLuint MaxFragmentProgramAluInstructions;
2260    GLuint MaxFragmentProgramTexInstructions;
2261    GLuint MaxFragmentProgramTexIndirections;
2262    /* vertex or fragment program */
2263    GLuint MaxProgramMatrices;
2264    GLuint MaxProgramMatrixStackDepth;
2265    /* vertex array / buffer object bounds checking */
2266    GLboolean CheckArrayBounds;
2267    /* GL_ARB_draw_buffers */
2268    GLuint MaxDrawBuffers;
2269    /* GL_OES_read_format */
2270    GLenum ColorReadFormat;
2271    GLenum ColorReadType;
2272    /* GL_EXT_framebuffer_object */
2273    GLuint MaxColorAttachments;
2274    GLuint MaxRenderbufferSize;
2275 };
2276
2277
2278 /**
2279  * Enable flag for each OpenGL extension.  Different device drivers will
2280  * enable different extensions at runtime.
2281  */
2282 struct gl_extensions
2283 {
2284    /**
2285     * \name Flags to quickly test if certain extensions are available.
2286     *
2287     * Not every extension needs to have such a flag, but it's encouraged.
2288     */
2289    /*@{*/
2290    GLboolean dummy;  /* don't remove this! */
2291    GLboolean ARB_depth_texture;
2292    GLboolean ARB_draw_buffers;
2293    GLboolean ARB_fragment_program;
2294    GLboolean ARB_fragment_shader;
2295    GLboolean ARB_half_float_pixel;
2296    GLboolean ARB_imaging;
2297    GLboolean ARB_multisample;
2298    GLboolean ARB_multitexture;
2299    GLboolean ARB_occlusion_query;
2300    GLboolean ARB_point_sprite;
2301    GLboolean ARB_shader_objects;
2302    GLboolean ARB_shading_language_100;
2303    GLboolean ARB_shadow;
2304    GLboolean ARB_texture_border_clamp;
2305    GLboolean ARB_texture_compression;
2306    GLboolean ARB_texture_cube_map;
2307    GLboolean ARB_texture_env_combine;
2308    GLboolean ARB_texture_env_crossbar;
2309    GLboolean ARB_texture_env_dot3;
2310    GLboolean ARB_texture_float;
2311    GLboolean ARB_texture_mirrored_repeat;
2312    GLboolean ARB_texture_non_power_of_two;
2313    GLboolean ARB_transpose_matrix;
2314    GLboolean ARB_vertex_buffer_object;
2315    GLboolean ARB_vertex_program;
2316    GLboolean ARB_vertex_shader;
2317    GLboolean ARB_window_pos;
2318    GLboolean EXT_abgr;
2319    GLboolean EXT_bgra;
2320    GLboolean EXT_blend_color;
2321    GLboolean EXT_blend_equation_separate;
2322    GLboolean EXT_blend_func_separate;
2323    GLboolean EXT_blend_logic_op;
2324    GLboolean EXT_blend_minmax;
2325    GLboolean EXT_blend_subtract;
2326    GLboolean EXT_clip_volume_hint;
2327    GLboolean EXT_cull_vertex;
2328    GLboolean EXT_convolution;
2329    GLboolean EXT_compiled_vertex_array;
2330    GLboolean EXT_copy_texture;
2331    GLboolean EXT_depth_bounds_test;
2332    GLboolean EXT_draw_range_elements;
2333    GLboolean EXT_framebuffer_object;
2334    GLboolean EXT_fog_coord;
2335    GLboolean EXT_histogram;
2336    GLboolean EXT_multi_draw_arrays;
2337    GLboolean EXT_paletted_texture;
2338    GLboolean EXT_packed_depth_stencil;
2339    GLboolean EXT_packed_pixels;
2340    GLboolean EXT_pixel_buffer_object;
2341    GLboolean EXT_point_parameters;
2342    GLboolean EXT_polygon_offset;
2343    GLboolean EXT_rescale_normal;
2344    GLboolean EXT_shadow_funcs;
2345    GLboolean EXT_secondary_color;
2346    GLboolean EXT_separate_specular_color;
2347    GLboolean EXT_shared_texture_palette;
2348    GLboolean EXT_stencil_wrap;
2349    GLboolean EXT_stencil_two_side;
2350    GLboolean EXT_subtexture;
2351    GLboolean EXT_texture;
2352    GLboolean EXT_texture_object;
2353    GLboolean EXT_texture3D;
2354    GLboolean EXT_texture_compression_s3tc;
2355    GLboolean EXT_texture_env_add;
2356    GLboolean EXT_texture_env_combine;
2357    GLboolean EXT_texture_env_dot3;
2358    GLboolean EXT_texture_filter_anisotropic;
2359    GLboolean EXT_texture_lod_bias;
2360    GLboolean EXT_texture_mirror_clamp;
2361    GLboolean EXT_timer_query;
2362    GLboolean EXT_vertex_array;
2363    GLboolean EXT_vertex_array_set;
2364    /* vendor extensions */
2365    GLboolean APPLE_client_storage;
2366    GLboolean APPLE_packed_pixels;
2367    GLboolean ATI_texture_mirror_once;
2368    GLboolean ATI_texture_env_combine3;
2369    GLboolean ATI_fragment_shader;
2370    GLboolean IBM_rasterpos_clip;
2371    GLboolean IBM_multimode_draw_arrays;
2372    GLboolean MESA_pack_invert;
2373    GLboolean MESA_packed_depth_stencil;
2374    GLboolean MESA_program_debug;
2375    GLboolean MESA_resize_buffers;
2376    GLboolean MESA_ycbcr_texture;
2377    GLboolean NV_blend_square;
2378    GLboolean NV_fragment_program;
2379    GLboolean NV_light_max_exponent;
2380    GLboolean NV_point_sprite;
2381    GLboolean NV_texgen_reflection;
2382    GLboolean NV_texture_rectangle;
2383    GLboolean NV_vertex_program;
2384    GLboolean NV_vertex_program1_1;
2385    GLboolean OES_read_format;
2386    GLboolean SGI_color_matrix;
2387    GLboolean SGI_color_table;
2388    GLboolean SGI_texture_color_table;
2389    GLboolean SGIS_generate_mipmap;
2390    GLboolean SGIS_pixel_texture;
2391    GLboolean SGIS_texture_edge_clamp;
2392    GLboolean SGIS_texture_lod;
2393    GLboolean SGIX_depth_texture;
2394    GLboolean SGIX_pixel_texture;
2395    GLboolean SGIX_shadow;
2396    GLboolean SGIX_shadow_ambient; /* or GL_ARB_shadow_ambient */
2397    GLboolean TDFX_texture_compression_FXT1;
2398    GLboolean S3_s3tc;
2399    /*@}*/
2400    /* The extension string */
2401    const GLubyte *String;
2402 };
2403
2404
2405 /**
2406  * A stack of matrices (projection, modelview, color, texture, etc).
2407  */
2408 struct matrix_stack
2409 {
2410    GLmatrix *Top;      /**< points into Stack */
2411    GLmatrix *Stack;    /**< array [MaxDepth] of GLmatrix */
2412    GLuint Depth;       /**< 0 <= Depth < MaxDepth */
2413    GLuint MaxDepth;    /**< size of Stack[] array */
2414    GLuint DirtyFlag;   /**< _NEW_MODELVIEW or _NEW_PROJECTION, for example */
2415 };
2416
2417
2418 /**
2419  * \name Bits for image transfer operations
2420  *
2421  * \sa __GLcontextRec::ImageTransferState.
2422  */
2423 /*@{*/
2424 #define IMAGE_SCALE_BIAS_BIT                      0x1
2425 #define IMAGE_SHIFT_OFFSET_BIT                    0x2
2426 #define IMAGE_MAP_COLOR_BIT                       0x4
2427 #define IMAGE_COLOR_TABLE_BIT                     0x8
2428 #define IMAGE_CONVOLUTION_BIT                     0x10
2429 #define IMAGE_POST_CONVOLUTION_SCALE_BIAS         0x20
2430 #define IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT    0x40
2431 #define IMAGE_COLOR_MATRIX_BIT                    0x80
2432 #define IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT   0x100
2433 #define IMAGE_HISTOGRAM_BIT                       0x200
2434 #define IMAGE_MIN_MAX_BIT                         0x400
2435 #define IMAGE_CLAMP_BIT                           0x800 /* extra */
2436
2437
2438 /** Pixel Transfer ops up to convolution */
2439 #define IMAGE_PRE_CONVOLUTION_BITS (IMAGE_SCALE_BIAS_BIT |     \
2440                                     IMAGE_SHIFT_OFFSET_BIT |   \
2441                                     IMAGE_MAP_COLOR_BIT |      \
2442                                     IMAGE_COLOR_TABLE_BIT)
2443
2444 /** Pixel transfer ops after convolution */
2445 #define IMAGE_POST_CONVOLUTION_BITS (IMAGE_POST_CONVOLUTION_SCALE_BIAS |      \
2446                                      IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT | \
2447                                      IMAGE_COLOR_MATRIX_BIT |                 \
2448                                      IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT |\
2449                                      IMAGE_HISTOGRAM_BIT |                    \
2450                                      IMAGE_MIN_MAX_BIT)
2451 /*@}*/
2452
2453
2454 /**
2455  * \name Bits to indicate what state has changed.
2456  *
2457  * 4 unused flags.
2458  */
2459 /*@{*/
2460 #define _NEW_MODELVIEW          0x1        /**< __GLcontextRec::ModelView */
2461 #define _NEW_PROJECTION         0x2        /**< __GLcontextRec::Projection */
2462 #define _NEW_TEXTURE_MATRIX     0x4        /**< __GLcontextRec::TextureMatrix */
2463 #define _NEW_COLOR_MATRIX       0x8        /**< __GLcontextRec::ColorMatrix */
2464 #define _NEW_ACCUM              0x10       /**< __GLcontextRec::Accum */
2465 #define _NEW_COLOR              0x20       /**< __GLcontextRec::Color */
2466 #define _NEW_DEPTH              0x40       /**< __GLcontextRec::Depth */
2467 #define _NEW_EVAL               0x80       /**< __GLcontextRec::Eval, __GLcontextRec::EvalMap */
2468 #define _NEW_FOG                0x100      /**< __GLcontextRec::Fog */
2469 #define _NEW_HINT               0x200      /**< __GLcontextRec::Hint */
2470 #define _NEW_LIGHT              0x400      /**< __GLcontextRec::Light */
2471 #define _NEW_LINE               0x800      /**< __GLcontextRec::Line */
2472 #define _NEW_PIXEL              0x1000     /**< __GLcontextRec::Pixel */
2473 #define _NEW_POINT              0x2000     /**< __GLcontextRec::Point */
2474 #define _NEW_POLYGON            0x4000     /**< __GLcontextRec::Polygon */
2475 #define _NEW_POLYGONSTIPPLE     0x8000     /**< __GLcontextRec::PolygonStipple */
2476 #define _NEW_SCISSOR            0x10000    /**< __GLcontextRec::Scissor */
2477 #define _NEW_STENCIL            0x20000    /**< __GLcontextRec::Stencil */
2478 #define _NEW_TEXTURE            0x40000    /**< __GLcontextRec::Texture */
2479 #define _NEW_TRANSFORM          0x80000    /**< __GLcontextRec::Transform */
2480 #define _NEW_VIEWPORT           0x100000   /**< __GLcontextRec::Viewport */
2481 #define _NEW_PACKUNPACK         0x200000   /**< __GLcontextRec::Pack, __GLcontextRec::Unpack */
2482 #define _NEW_ARRAY              0x400000   /**< __GLcontextRec::Array */
2483 #define _NEW_RENDERMODE         0x800000   /**< __GLcontextRec::RenderMode, __GLcontextRec::Feedback, __GLcontextRec::Select */
2484 #define _NEW_BUFFERS            0x1000000  /**< __GLcontextRec::Visual, __GLcontextRec::DrawBuffer, */
2485 #define _NEW_MULTISAMPLE        0x2000000  /**< __GLcontextRec::Multisample */
2486 #define _NEW_TRACK_MATRIX       0x4000000  /**< __GLcontextRec::VertexProgram */
2487 #define _NEW_PROGRAM            0x8000000  /**< __GLcontextRec::VertexProgram */
2488 #define _NEW_ALL ~0
2489 /*@}*/
2490
2491
2492 /**
2493  * \name Bits to track array state changes
2494  *
2495  * Also used to summarize array enabled.
2496  */
2497 /*@{*/
2498 #define _NEW_ARRAY_VERTEX           VERT_BIT_POS
2499 #define _NEW_ARRAY_WEIGHT           VERT_BIT_WEIGHT
2500 #define _NEW_ARRAY_NORMAL           VERT_BIT_NORMAL
2501 #define _NEW_ARRAY_COLOR0           VERT_BIT_COLOR0
2502 #define _NEW_ARRAY_COLOR1           VERT_BIT_COLOR1
2503 #define _NEW_ARRAY_FOGCOORD         VERT_BIT_FOG
2504 #define _NEW_ARRAY_INDEX            VERT_BIT_SIX
2505 #define _NEW_ARRAY_EDGEFLAG         VERT_BIT_SEVEN
2506 #define _NEW_ARRAY_TEXCOORD_0       VERT_BIT_TEX0
2507 #define _NEW_ARRAY_TEXCOORD_1       VERT_BIT_TEX1
2508 #define _NEW_ARRAY_TEXCOORD_2       VERT_BIT_TEX2
2509 #define _NEW_ARRAY_TEXCOORD_3       VERT_BIT_TEX3
2510 #define _NEW_ARRAY_TEXCOORD_4       VERT_BIT_TEX4
2511 #define _NEW_ARRAY_TEXCOORD_5       VERT_BIT_TEX5
2512 #define _NEW_ARRAY_TEXCOORD_6       VERT_BIT_TEX6
2513 #define _NEW_ARRAY_TEXCOORD_7       VERT_BIT_TEX7
2514 #define _NEW_ARRAY_ATTRIB_0         0x10000  /* start at bit 16 */
2515 #define _NEW_ARRAY_ALL              0xffffffff
2516
2517
2518 #define _NEW_ARRAY_TEXCOORD(i) (_NEW_ARRAY_TEXCOORD_0 << (i))
2519 #define _NEW_ARRAY_ATTRIB(i) (_NEW_ARRAY_ATTRIB_0 << (i))
2520 /*@}*/
2521
2522
2523 /**
2524  * \name A bunch of flags that we think might be useful to drivers.
2525  *
2526  * Set in the __GLcontextRec::_TriangleCaps bitfield.
2527  */
2528 /*@{*/
2529 #define DD_FLATSHADE                0x1
2530 #define DD_SEPARATE_SPECULAR        0x2
2531 #define DD_TRI_CULL_FRONT_BACK      0x4 /* special case on some hw */
2532 #define DD_TRI_LIGHT_TWOSIDE        0x8
2533 #define DD_TRI_UNFILLED             0x10
2534 #define DD_TRI_SMOOTH               0x20
2535 #define DD_TRI_STIPPLE              0x40
2536 #define DD_TRI_OFFSET               0x80
2537 #define DD_LINE_SMOOTH              0x100
2538 #define DD_LINE_STIPPLE             0x200
2539 #define DD_LINE_WIDTH               0x400
2540 #define DD_POINT_SMOOTH             0x800
2541 #define DD_POINT_SIZE               0x1000
2542 #define DD_POINT_ATTEN              0x2000
2543 #define DD_TRI_TWOSTENCIL           0x4000
2544 /*@}*/
2545
2546
2547 /**
2548  * \name Define the state changes under which each of these bits might change
2549  */
2550 /*@{*/
2551 #define _DD_NEW_FLATSHADE                _NEW_LIGHT
2552 #define _DD_NEW_SEPARATE_SPECULAR        (_NEW_LIGHT | _NEW_FOG | _NEW_PROGRAM)
2553 #define _DD_NEW_TRI_CULL_FRONT_BACK      _NEW_POLYGON
2554 #define _DD_NEW_TRI_LIGHT_TWOSIDE        _NEW_LIGHT
2555 #define _DD_NEW_TRI_UNFILLED             _NEW_POLYGON
2556 #define _DD_NEW_TRI_SMOOTH               _NEW_POLYGON
2557 #define _DD_NEW_TRI_STIPPLE              _NEW_POLYGON
2558 #define _DD_NEW_TRI_OFFSET               _NEW_POLYGON
2559 #define _DD_NEW_LINE_SMOOTH              _NEW_LINE
2560 #define _DD_NEW_LINE_STIPPLE             _NEW_LINE
2561 #define _DD_NEW_LINE_WIDTH               _NEW_LINE
2562 #define _DD_NEW_POINT_SMOOTH             _NEW_POINT
2563 #define _DD_NEW_POINT_SIZE               _NEW_POINT
2564 #define _DD_NEW_POINT_ATTEN              _NEW_POINT
2565 /*@}*/
2566
2567
2568 #define _MESA_NEW_NEED_EYE_COORDS         (_NEW_LIGHT |         \
2569                                            _NEW_TEXTURE |       \
2570                                            _NEW_POINT |         \
2571                                            _NEW_MODELVIEW)
2572
2573 #define _MESA_NEW_NEED_NORMALS            (_NEW_LIGHT |         \
2574                                            _NEW_TEXTURE)
2575
2576 #define _IMAGE_NEW_TRANSFER_STATE         (_NEW_PIXEL | _NEW_COLOR_MATRIX)
2577
2578
2579
2580
2581 /*
2582  * Forward declaration of display list data types:
2583  */
2584 union node;
2585 typedef union node Node;
2586
2587
2588 /* This has to be included here. */
2589 #include "dd.h"
2590
2591
2592 #define NUM_VERTEX_FORMAT_ENTRIES (sizeof(GLvertexformat) / sizeof(void *))
2593
2594 /**
2595  * Core Mesa's support for tnl modules:
2596  */
2597 struct gl_tnl_module
2598 {
2599    /**
2600     * Vertex format to be lazily swapped into current dispatch.
2601     */
2602    const GLvertexformat *Current;
2603
2604    /**
2605     * \name Record of functions swapped out.
2606     * On restore, only need to swap these functions back in.
2607     */
2608    /*@{*/
2609    struct {
2610        _glapi_proc * location;
2611        _glapi_proc function;
2612    } Swapped[NUM_VERTEX_FORMAT_ENTRIES];
2613    GLuint SwapCount;
2614    /*@}*/
2615 };
2616
2617 /* Strictly this is a tnl/ private concept, but it doesn't seem
2618  * worthwhile adding a tnl private structure just to hold this one bit
2619  * of information:
2620  */
2621 #define MESA_DLIST_DANGLING_REFS     0x1
2622
2623 /* Provide a location where information about a display list can be
2624  * collected.  Could be extended with driverPrivate structures,
2625  * etc. in the future.
2626  */
2627 struct mesa_display_list
2628 {
2629    Node *node;
2630    GLuint id;
2631    GLbitfield flags;
2632 };
2633
2634
2635 /**
2636  * State used during display list compilation and execution.
2637  */
2638 struct mesa_list_state
2639 {
2640    struct mesa_display_list *CallStack[MAX_LIST_NESTING];
2641    GLuint CallDepth;            /**< Current recursion calling depth */
2642
2643    struct mesa_display_list *CurrentList;
2644    Node *CurrentListPtr;        /**< Head of list being compiled */
2645    GLuint CurrentListNum;       /**< Number of the list being compiled */
2646    Node *CurrentBlock;          /**< Pointer to current block of nodes */
2647    GLuint CurrentPos;           /**< Index into current block of nodes */
2648
2649    GLvertexformat ListVtxfmt;
2650
2651    GLubyte ActiveAttribSize[VERT_ATTRIB_MAX];
2652    GLfloat CurrentAttrib[VERT_ATTRIB_MAX][4];
2653
2654    GLubyte ActiveMaterialSize[MAT_ATTRIB_MAX];
2655    GLfloat CurrentMaterial[MAT_ATTRIB_MAX][4];
2656
2657    GLubyte ActiveIndex;
2658    GLfloat CurrentIndex;
2659
2660    GLubyte ActiveEdgeFlag;
2661    GLboolean CurrentEdgeFlag;
2662 };
2663
2664
2665 /**
2666  * Mesa rendering context.
2667  *
2668  * This is the central context data structure for Mesa.  Almost all
2669  * OpenGL state is contained in this structure.
2670  * Think of this as a base class from which device drivers will derive
2671  * sub classes.
2672  *
2673  * The GLcontext typedef names this structure.
2674  */
2675 struct __GLcontextRec
2676 {
2677    /**
2678     * \name OS related interfaces.
2679     *
2680     * These \b must be the first members of this structure, because they are
2681     * exposed to the outside world (i.e. GLX extension).
2682     */
2683    /*@{*/
2684    __GLimports imports;
2685    __GLexports exports;
2686    /*@}*/
2687
2688    /** State possibly shared with other contexts in the address space */
2689    struct gl_shared_state *Shared;
2690
2691    /** \name API function pointer tables */
2692    /*@{*/
2693    struct _glapi_table *Save;   /**< Display list save functions */
2694    struct _glapi_table *Exec;   /**< Execute functions */
2695    struct _glapi_table *CurrentDispatch;  /**< == Save or Exec !! */
2696    /*@}*/
2697
2698    GLvisual Visual;
2699    GLframebuffer *DrawBuffer;   /**< buffer for writing */
2700    GLframebuffer *ReadBuffer;   /**< buffer for reading */
2701    GLframebuffer *WinSysDrawBuffer;  /**< set with MakeCurrent */
2702    GLframebuffer *WinSysReadBuffer;  /**< set with MakeCurrent */
2703
2704    /**
2705     * Device driver function pointer table
2706     */
2707    struct dd_function_table Driver;
2708
2709    void *DriverCtx;     /**< Points to device driver context/state */
2710    void *DriverMgrCtx;  /**< Points to device driver manager (optional)*/
2711
2712    /** Core/Driver constants */
2713    struct gl_constants Const;
2714
2715    /** \name The various 4x4 matrix stacks */
2716    /*@{*/
2717    struct matrix_stack ModelviewMatrixStack;
2718    struct matrix_stack ProjectionMatrixStack;
2719    struct matrix_stack ColorMatrixStack;
2720    struct matrix_stack TextureMatrixStack[MAX_TEXTURE_COORD_UNITS];
2721    struct matrix_stack ProgramMatrixStack[MAX_PROGRAM_MATRICES];
2722    struct matrix_stack *CurrentStack; /**< Points to one of the above stacks */
2723    /*@}*/
2724
2725    /** Combined modelview and projection matrix */
2726    GLmatrix _ModelProjectMatrix;
2727
2728    /** \name Display lists */
2729    struct mesa_list_state ListState;
2730
2731    GLboolean ExecuteFlag;       /**< Execute GL commands? */
2732    GLboolean CompileFlag;       /**< Compile GL commands into display list? */
2733
2734    /** Extensions */
2735    struct gl_extensions Extensions;
2736
2737    /** \name Renderer attribute stack */
2738    /*@{*/
2739    GLuint AttribStackDepth;
2740    struct gl_attrib_node *AttribStack[MAX_ATTRIB_STACK_DEPTH];
2741    /*@}*/
2742
2743    /** \name Renderer attribute groups
2744     *
2745     * We define a struct for each attribute group to make pushing and popping
2746     * attributes easy.  Also it's a good organization.
2747     */
2748    /*@{*/
2749    struct gl_accum_attrib       Accum;          /**< Accumulation buffer attributes */
2750    struct gl_colorbuffer_attrib Color;          /**< Color buffers attributes */
2751    struct gl_current_attrib     Current;        /**< Current attributes */
2752    struct gl_depthbuffer_attrib Depth;          /**< Depth buffer attributes */
2753    struct gl_eval_attrib        Eval;           /**< Eval attributes */
2754    struct gl_fog_attrib         Fog;            /**< Fog attributes */
2755    struct gl_hint_attrib        Hint;           /**< Hint attributes */
2756    struct gl_light_attrib       Light;          /**< Light attributes */
2757    struct gl_line_attrib        Line;           /**< Line attributes */
2758    struct gl_list_attrib        List;           /**< List attributes */
2759    struct gl_multisample_attrib Multisample;
2760    struct gl_pixel_attrib       Pixel;          /**< Pixel attributes */
2761    struct gl_point_attrib       Point;          /**< Point attributes */
2762    struct gl_polygon_attrib     Polygon;        /**< Polygon attributes */
2763    GLuint PolygonStipple[32];                   /**< Polygon stipple */
2764    struct gl_scissor_attrib     Scissor;        /**< Scissor attributes */
2765    struct gl_stencil_attrib     Stencil;        /**< Stencil buffer attributes */
2766    struct gl_texture_attrib     Texture;        /**< Texture attributes */
2767    struct gl_transform_attrib   Transform;      /**< Transformation attributes */
2768    struct gl_viewport_attrib    Viewport;       /**< Viewport attributes */
2769    /*@}*/
2770
2771    /** \name Client attribute stack */
2772    /*@{*/
2773    GLuint ClientAttribStackDepth;
2774    struct gl_attrib_node *ClientAttribStack[MAX_CLIENT_ATTRIB_STACK_DEPTH];
2775    /*@}*/
2776
2777    /** \name Client attribute groups */
2778    /*@{*/
2779    struct gl_array_attrib       Array;  /**< Vertex arrays */
2780    struct gl_pixelstore_attrib  Pack;   /**< Pixel packing */
2781    struct gl_pixelstore_attrib  Unpack; /**< Pixel unpacking */
2782    struct gl_pixelstore_attrib  DefaultPacking; /**< Default params */
2783    /*@}*/
2784
2785    /** \name Other assorted state (not pushed/popped on attribute stack) */
2786    /*@{*/
2787    struct gl_histogram_attrib   Histogram;
2788    struct gl_minmax_attrib      MinMax;
2789    struct gl_convolution_attrib Convolution1D;
2790    struct gl_convolution_attrib Convolution2D;
2791    struct gl_convolution_attrib Separable2D;
2792
2793    struct gl_evaluators EvalMap;   /**< All evaluators */
2794    struct gl_feedback   Feedback;  /**< Feedback */
2795    struct gl_selection  Select;    /**< Selection */
2796
2797    struct gl_color_table ColorTable;       /**< Pre-convolution */
2798    struct gl_color_table ProxyColorTable;  /**< Pre-convolution */
2799    struct gl_color_table PostConvolutionColorTable;
2800    struct gl_color_table ProxyPostConvolutionColorTable;
2801    struct gl_color_table PostColorMatrixColorTable;
2802    struct gl_color_table ProxyPostColorMatrixColorTable;
2803
2804    struct gl_program_state Program;        /**< for vertex or fragment progs */
2805    struct gl_vertex_program_state VertexProgram;   /**< GL_NV_vertex_program */
2806    struct gl_fragment_program_state FragmentProgram;  /**< GL_NV_fragment_program */
2807    struct gl_ati_fragment_shader_state ATIFragmentShader;  /**< GL_ATI_fragment_shader */
2808
2809    struct fragment_program *_TexEnvProgram;     /**< Texture state as fragment program */
2810    struct vertex_program *_TnlProgram;          /**< Fixed func TNL state as vertex program */
2811
2812    GLboolean _MaintainTexEnvProgram;
2813    GLboolean _MaintainTnlProgram;
2814
2815    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
2816
2817    struct gl_shader_objects_state ShaderObjects;        /* GL_ARB_shader_objects */
2818    /*@}*/
2819
2820 #if FEATURE_EXT_framebuffer_object
2821    /*struct gl_framebuffer *CurrentFramebuffer;*/
2822    struct gl_renderbuffer *CurrentRenderbuffer;
2823 #endif
2824
2825    GLenum ErrorValue;        /**< Last error code */
2826    GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
2827    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
2828
2829    /** \name Derived state */
2830    /*@{*/
2831    GLbitfield _TriangleCaps;      /**< bitwise-or of DD_* flags */
2832    GLbitfield _ImageTransferState;/**< bitwise-or of IMAGE_*_BIT flags */
2833    GLfloat _EyeZDir[3];
2834    GLfloat _ModelViewInvScale;
2835    GLboolean _NeedEyeCoords;
2836    GLboolean _ForceEyeCoords;
2837    GLboolean _RotateMode;
2838    GLenum _CurrentProgram;    /* currently executing program */
2839
2840    struct gl_shine_tab *_ShineTable[2]; /**< Active shine tables */
2841    struct gl_shine_tab *_ShineTabList;  /**< MRU list of inactive shine tables */
2842    /**@}*/
2843
2844    struct gl_list_extensions ListExt; /**< driver dlist extensions */
2845
2846
2847    GLuint _Facing; /**< This is a hack for 2-sided stencil test.
2848                     *
2849                     * We don't have a better way to communicate this value from
2850                     * swrast_setup to swrast. */
2851
2852    /** \name Color clamping (tentative part of GL_ARB_color_clamp_control) */
2853    /*@{*/
2854    GLboolean ClampFragmentColors;
2855    GLboolean ClampVertexColors;
2856    /*@}*/
2857
2858    /** \name For debugging/development only */
2859    /*@{*/
2860    GLboolean FirstTimeCurrent;
2861    /*@}*/
2862
2863    /** Dither disable via MESA_NO_DITHER env var */
2864    GLboolean NoDither;
2865
2866    /** software compression/decompression supported or not */
2867    GLboolean Mesa_DXTn;
2868
2869    /** Core tnl module support */
2870    struct gl_tnl_module TnlModule;
2871
2872    /**
2873     * \name Hooks for module contexts.
2874     *
2875     * These will eventually live in the driver or elsewhere.
2876     */
2877    /*@{*/
2878    void *swrast_context;
2879    void *swsetup_context;
2880    void *swtnl_context;
2881    void *swtnl_im;
2882    void *acache_context;
2883    void *aelt_context;
2884    /*@}*/
2885 };
2886
2887
2888 /** The string names for GL_POINT, GL_LINE_LOOP, etc */
2889 extern const char *_mesa_prim_name[GL_POLYGON+4];
2890
2891
2892 #ifdef MESA_DEBUG
2893 extern int MESA_VERBOSE;
2894 extern int MESA_DEBUG_FLAGS;
2895 # define MESA_FUNCTION __FUNCTION__
2896 #else
2897 # define MESA_VERBOSE 0
2898 # define MESA_DEBUG_FLAGS 0
2899 # define MESA_FUNCTION "a function"
2900 # ifndef NDEBUG
2901 #  define NDEBUG
2902 # endif
2903 #endif
2904
2905
2906 enum _verbose
2907 {
2908    VERBOSE_VARRAY               = 0x0001,
2909    VERBOSE_TEXTURE              = 0x0002,
2910    VERBOSE_IMMEDIATE            = 0x0004,
2911    VERBOSE_PIPELINE             = 0x0008,
2912    VERBOSE_DRIVER               = 0x0010,
2913    VERBOSE_STATE                = 0x0020,
2914    VERBOSE_API                  = 0x0040,
2915    VERBOSE_DISPLAY_LIST         = 0x0100,
2916    VERBOSE_LIGHTING             = 0x0200,
2917    VERBOSE_PRIMS                = 0x0400,
2918    VERBOSE_VERTS                = 0x0800,
2919    VERBOSE_DISASSEM             = 0x1000
2920 };
2921
2922
2923 enum _debug
2924 {
2925    DEBUG_ALWAYS_FLUSH           = 0x1
2926 };
2927
2928
2929
2930 #define Elements(x) sizeof(x)/sizeof(*(x))
2931
2932
2933 #endif /* TYPES_H */