src/mesa/drivers/x11/xmesaP.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #ifndef XMESAP_H
  27 #define XMESAP_H
  28
  29
  30 #include "xmesa.h"
  31 #include "main/mtypes.h"
  32
  33
  34 extern _glthread_Mutex _xmesa_lock;
  35
  36 extern XMesaBuffer XMesaBufferList;
  37
  38 /* for PF_8R8G8B24 pixel format */
  39 typedef struct {
  40    GLubyte b;
  41    GLubyte g;
  42    GLubyte r;
  43 } bgr_t;
  44
  45
  46 struct xmesa_renderbuffer;
  47
  48
  49 /* Function pointer for clearing color buffers */
  50 typedef void (*ClearFunc)( struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
  51                            GLint x, GLint y, GLint width, GLint height );
  52
  53
  54
  55
  56 /** Framebuffer pixel formats */
  57 enum pixel_format {
  58    PF_Index,            /**< Color Index mode */
  59    PF_Truecolor,        /**< TrueColor or DirectColor, any depth */
  60    PF_Dither_True,      /**< TrueColor with dithering */
  61    PF_8A8R8G8B,         /**< 32-bit TrueColor:  8-A, 8-R, 8-G, 8-B bits */
  62    PF_8A8B8G8R,         /**< 32-bit TrueColor:  8-A, 8-B, 8-G, 8-R bits */
  63    PF_8R8G8B,           /**< 32-bit TrueColor:  8-R, 8-G, 8-B bits */
  64    PF_8R8G8B24,         /**< 24-bit TrueColor:  8-R, 8-G, 8-B bits */
  65    PF_5R6G5B,           /**< 16-bit TrueColor:  5-R, 6-G, 5-B bits */
  66    PF_Dither,           /**< Color-mapped RGB with dither */
  67    PF_Lookup,           /**< Color-mapped RGB without dither */
  68    PF_HPCR,             /**< HP Color Recovery (ad@lms.be 30/08/95) */
  69    PF_1Bit,             /**< monochrome dithering of RGB */
  70    PF_Grayscale,        /**< Grayscale or StaticGray */
  71    PF_Dither_5R6G5B     /**< 16-bit dithered TrueColor: 5-R, 6-G, 5-B */
  72 };
  73
  74
  75 /**
  76  * Visual inforation, derived from struct gl_config.
  77  * Basically corresponds to an XVisualInfo.
  78  */
  79 struct xmesa_visual {
  80    struct gl_config mesa_visual;        /* Device independent visual parameters */
  81    XMesaDisplay *display;       /* The X11 display */
  82    int screen, visualID;
  83    int visualType;
  84    XMesaVisualInfo visinfo;     /* X's visual info (pointer to private copy) */
  85    XVisualInfo *vishandle;      /* Only used in fakeglx.c */
  86    GLint BitsPerPixel;          /* True bits per pixel for XImages */
  87
  88    GLboolean ximage_flag;       /* Use XImage for back buffer (not pixmap)? */
  89
  90    enum pixel_format dithered_pf;  /* Pixel format when dithering */
  91    enum pixel_format undithered_pf;/* Pixel format when not dithering */
  92
  93    GLfloat RedGamma;            /* Gamma values, 1.0 is default */
  94    GLfloat GreenGamma;
  95    GLfloat BlueGamma;
  96
  97    /* For PF_TRUECOLOR */
  98    GLint rshift, gshift, bshift;/* Pixel color component shifts */
  99    GLubyte Kernel[16];          /* Dither kernel */
 100    unsigned long RtoPixel[512]; /* RGB to pixel conversion */
 101    unsigned long GtoPixel[512];
 102    unsigned long BtoPixel[512];
 103    GLubyte PixelToR[256];       /* Pixel to RGB conversion */
 104    GLubyte PixelToG[256];
 105    GLubyte PixelToB[256];
 106
 107    /* For PF_HPCR */
 108    short       hpcr_rgbTbl[3][256];
 109    GLboolean   hpcr_clear_flag;
 110    GLubyte     hpcr_clear_ximage_pattern[2][16];
 111    XMesaImage *hpcr_clear_ximage;
 112    XMesaPixmap hpcr_clear_pixmap;
 113
 114    /* For PF_1BIT */
 115    int bitFlip;
 116 };
 117
 118
 119 /**
 120  * Context info, derived from struct gl_context.
 121  * Basically corresponds to a GLXContext.
 122  */
 123 struct xmesa_context {
 124    struct gl_context mesa;              /* the core library context (containment) */
 125    XMesaVisual xm_visual;       /* Describes the buffers */
 126    XMesaBuffer xm_buffer;       /* current span/point/line/triangle buffer */
 127
 128    XMesaDisplay *display;       /* == xm_visual->display */
 129    GLboolean swapbytes;         /* Host byte order != display byte order? */
 130    GLboolean direct;            /* Direct rendering context? */
 131
 132    enum pixel_format pixelformat;
 133
 134    GLubyte clearcolor[4];               /* current clearing color */
 135    unsigned long clearpixel;            /* current clearing pixel value */
 136 };
 137
 138
 139 /**
 140  * Types of X/GLX drawables we might render into.
 141  */
 142 typedef enum {
 143    WINDOW,          /* An X window */
 144    GLXWINDOW,       /* GLX window */
 145    PIXMAP,          /* GLX pixmap */
 146    PBUFFER          /* GLX Pbuffer */
 147 } BufferType;
 148
 149
 150 /** Values for db_mode: */
 151 /*@{*/
 152 #define BACK_PIXMAP     1
 153 #define BACK_XIMAGE     2
 154 /*@}*/
 155
 156
 157 /**
 158  * An xmesa_renderbuffer represents the back or front color buffer.
 159  * For the front color buffer:
 160  *    <drawable> is the X window
 161  * For the back color buffer:
 162  *    Either <ximage> or <pixmap> will be used, never both.
 163  * In any case, <drawable> always equals <pixmap>.
 164  * For stand-alone Mesa, we could merge <drawable> and <pixmap> into one
 165  * field.  We don't do that for the server-side GLcore module because
 166  * pixmaps and drawables are different and we'd need a bunch of casts.
 167  */
 168 struct xmesa_renderbuffer
 169 {
 170    struct gl_renderbuffer Base;  /* Base class */
 171
 172    XMesaBuffer Parent;  /**< The XMesaBuffer this renderbuffer belongs to */
 173    XMesaDrawable drawable;      /* Usually the X window ID */
 174    XMesaPixmap pixmap;  /* Back color buffer */
 175    XMesaImage *ximage;  /* The back buffer, if not using a Pixmap */
 176
 177    GLubyte *origin1;    /* used for PIXEL_ADDR1 macro */
 178    GLint width1;
 179    GLushort *origin2;   /* used for PIXEL_ADDR2 macro */
 180    GLint width2;
 181    GLubyte *origin3;    /* used for PIXEL_ADDR3 macro */
 182    GLint width3;
 183    GLuint *origin4;     /* used for PIXEL_ADDR4 macro */
 184    GLint width4;
 185
 186    GLint bottom;        /* used for FLIP macro, equals height - 1 */
 187
 188    ClearFunc clearFunc;
 189
 190    GLuint map_x, map_y, map_w, map_h;
 191    GLbitfield map_mode;
 192    XMesaImage *map_ximage;
 193 };
 194
 195
 196 /**
 197  * Framebuffer information, derived from.
 198  * Basically corresponds to a GLXDrawable.
 199  */
 200 struct xmesa_buffer {
 201    struct gl_framebuffer mesa_buffer;   /* depth, stencil, accum, etc buffers */
 202                                 /* This MUST BE FIRST! */
 203    GLboolean wasCurrent;        /* was ever the current buffer? */
 204    XMesaVisual xm_visual;       /* the X/Mesa visual */
 205
 206    XMesaDisplay *display;
 207    BufferType type;             /* window, pixmap, pbuffer or glxwindow */
 208
 209    GLboolean largestPbuffer;    /**< for pbuffers */
 210    GLboolean preservedContents; /**< for pbuffers */
 211
 212    struct xmesa_renderbuffer *frontxrb; /* front color renderbuffer */
 213    struct xmesa_renderbuffer *backxrb;  /* back color renderbuffer */
 214
 215    XMesaColormap cmap;          /* the X colormap */
 216
 217    unsigned long selectedEvents;/* for pbuffers only */
 218
 219    GLint db_mode;               /* 0 = single buffered */
 220                                 /* BACK_PIXMAP = use Pixmap for back buffer */
 221                                 /* BACK_XIMAGE = use XImage for back buffer */
 222    GLboolean swAlpha;
 223
 224    GLuint shm;                  /* X Shared Memory extension status:    */
 225                                 /*    0 = not available                 */
 226                                 /*    1 = XImage support available      */
 227                                 /*    2 = Pixmap support available too  */
 228 #if defined(USE_XSHM)
 229    XShmSegmentInfo shminfo;
 230 #endif
 231
 232    XMesaImage *rowimage;        /* Used for optimized span writing */
 233    XMesaPixmap stipple_pixmap;  /* For polygon stippling */
 234    XMesaGC stipple_gc;          /* For polygon stippling */
 235
 236    XMesaGC gc;                  /* scratch GC for span, line, tri drawing */
 237    XMesaGC cleargc;             /* GC for clearing the color buffer */
 238    XMesaGC swapgc;              /* GC for swapping the color buffers */
 239
 240    /* The following are here instead of in the XMesaVisual
 241     * because they depend on the window's colormap.
 242     */
 243
 244    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 245    unsigned long color_table[576];      /* RGB -> pixel value */
 246
 247    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 248    GLubyte pixel_to_r[65536];           /* pixel value -> red */
 249    GLubyte pixel_to_g[65536];           /* pixel value -> green */
 250    GLubyte pixel_to_b[65536];           /* pixel value -> blue */
 251
 252    /* Used to do XAllocColor/XFreeColors accounting: */
 253    int num_alloced;
 254    unsigned long alloced_colors[256];
 255
 256    /* GLX_EXT_texture_from_pixmap */
 257    GLint TextureTarget; /** GLX_TEXTURE_1D_EXT, for example */
 258    GLint TextureFormat; /** GLX_TEXTURE_FORMAT_RGB_EXT, for example */
 259    GLint TextureMipmap; /** 0 or 1 */
 260
 261    struct xmesa_buffer *Next;   /* Linked list pointer: */
 262 };
 263
 264
 265 /**
 266  * If pixelformat==PF_TRUECOLOR:
 267  */
 268 #define PACK_TRUECOLOR( PIXEL, R, G, B )        \
 269    PIXEL = xmesa->xm_visual->RtoPixel[R]        \
 270          | xmesa->xm_visual->GtoPixel[G]        \
 271          | xmesa->xm_visual->BtoPixel[B];       \
 272
 273
 274 /**
 275  * If pixelformat==PF_TRUEDITHER:
 276  */
 277 #define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B )                 \
 278 {                                                               \
 279    int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)];    \
 280    PIXEL = xmesa->xm_visual->RtoPixel[(R)+d]                    \
 281          | xmesa->xm_visual->GtoPixel[(G)+d]                    \
 282          | xmesa->xm_visual->BtoPixel[(B)+d];                   \
 283 }
 284
 285
 286
 287 /**
 288  * If pixelformat==PF_8A8B8G8R:
 289  */
 290 #define PACK_8A8B8G8R( R, G, B, A )     \
 291         ( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
 292
 293
 294 /**
 295  * Like PACK_8A8B8G8R() but don't use alpha.  This is usually an acceptable
 296  * shortcut.
 297  */
 298 #define PACK_8B8G8R( R, G, B )   ( ((B) << 16) | ((G) << 8) | (R) )
 299
 300
 301
 302 /**
 303  * If pixelformat==PF_8R8G8B:
 304  */
 305 #define PACK_8R8G8B( R, G, B)    ( ((R) << 16) | ((G) << 8) | (B) )
 306
 307
 308 /**
 309  * If pixelformat==PF_5R6G5B:
 310  */
 311 #define PACK_5R6G5B( R, G, B)    ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
 312
 313
 314 /**
 315  * If pixelformat==PF_8A8R8G8B:
 316  */
 317 #define PACK_8A8R8G8B( R, G, B, A )     \
 318         ( ((A) << 24) | ((R) << 16) | ((G) << 8) | (B) )
 319
 320
 321
 322 /**
 323  * If pixelformat==PF_DITHER:
 324  *
 325  * Improved 8-bit RGB dithering code contributed by Bob Mercier
 326  * (mercier@hollywood.cinenet.net).  Thanks Bob!
 327  */
 328 #ifdef DITHER666
 329 # define DITH_R   6
 330 # define DITH_G   6
 331 # define DITH_B   6
 332 # define DITH_MIX(r,g,b)  (((r) * DITH_G + (g)) * DITH_B + (b))
 333 #else
 334 # define DITH_R 5
 335 # define DITH_G 9
 336 # define DITH_B 5
 337 # define DITH_MIX(r,g,b)  (((g) << 6) | ((b) << 3) | (r))
 338 #endif
 339 #define DITH_DX 4
 340 #define DITH_DY 4
 341 #define DITH_N  (DITH_DX * DITH_DY)
 342
 343 #define _dither(C, c, d)   (((unsigned)((DITH_N * (C - 1) + 1) * c + d)) >> 12)
 344
 345 #define MAXC    256
 346 extern const int xmesa_kernel8[DITH_DY * DITH_DX];
 347
 348 /* Dither for random X,Y */
 349 #define DITHER_SETUP                                            \
 350         int __d;                                                \
 351         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;
 352
 353 #define DITHER( X, Y, R, G, B )                         \
 354         (__d = xmesa_kernel8[(((Y)&3)<<2) | ((X)&3)],   \
 355          ctable[DITH_MIX(_dither(DITH_R, (R), __d),     \
 356                          _dither(DITH_G, (G), __d),     \
 357                          _dither(DITH_B, (B), __d))])
 358
 359 /* Dither for random X, fixed Y */
 360 #define XDITHER_SETUP(Y)                                        \
 361         int __d;                                                \
 362         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;     \
 363         const int *kernel = &xmesa_kernel8[ ((Y)&3) << 2 ];
 364
 365 #define XDITHER( X, R, G, B )                           \
 366         (__d = kernel[(X)&3],                           \
 367         ctable[DITH_MIX(_dither(DITH_R, (R), __d),      \
 368                         _dither(DITH_G, (G), __d),      \
 369                         _dither(DITH_B, (B), __d))])
 370
 371
 372
 373 /*
 374  * Dithering for flat-shaded triangles.  Precompute all 16 possible
 375  * pixel values given the triangle's RGB color.  Contributed by Martin Shenk.
 376  */
 377 #define FLAT_DITHER_SETUP( R, G, B )                                    \
 378         GLushort ditherValues[16];                                      \
 379         {                                                               \
 380            unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;  \
 381            int msdr = (DITH_N*((DITH_R)-1)+1) * (R);                    \
 382            int msdg = (DITH_N*((DITH_G)-1)+1) * (G);                    \
 383            int msdb = (DITH_N*((DITH_B)-1)+1) * (B);                    \
 384            int i;                                                       \
 385            for (i=0;i<16;i++) {                                         \
 386               int k = xmesa_kernel8[i];                                 \
 387               int j = DITH_MIX( (msdr+k)>>12, (msdg+k)>>12, (msdb+k)>>12 );\
 388               ditherValues[i] = (GLushort) ctable[j];                   \
 389            }                                                            \
 390         }
 391
 392 #define FLAT_DITHER_ROW_SETUP(Y)                                        \
 393         GLushort *ditherRow = ditherValues + ( ((Y)&3) << 2);
 394
 395 #define FLAT_DITHER(X)  ditherRow[(X)&3]
 396
 397
 398
 399 /**
 400  * If pixelformat==PF_LOOKUP:
 401  */
 402 #define _dither_lookup(C, c)   (((unsigned)((DITH_N * (C - 1) + 1) * c)) >> 12)
 403
 404 #define LOOKUP_SETUP                                            \
 405         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table
 406
 407 #define LOOKUP( R, G, B )                               \
 408         ctable[DITH_MIX(_dither_lookup(DITH_R, (R)),    \
 409                         _dither_lookup(DITH_G, (G)),    \
 410                         _dither_lookup(DITH_B, (B)))]
 411
 412
 413 /**
 414  * If pixelformat==PF_HPCR:
 415  *
 416  *      HP Color Recovery dithering               (ad@lms.be 30/08/95)
 417  *      HP has on its 8-bit 700-series computers, a feature called
 418  *      'Color Recovery'.  This allows near 24-bit output (so they say).
 419  *      It is enabled by selecting the 8-bit  TrueColor  visual AND
 420  *      corresponding  colormap (see tkInitWindow) AND doing some special
 421  *      dither.
 422  */
 423 extern const short xmesa_HPCR_DRGB[3][2][16];
 424
 425 #define DITHER_HPCR( X, Y, R, G, B )                                       \
 426   ( ((xmesa->xm_visual->hpcr_rgbTbl[0][R] + xmesa_HPCR_DRGB[0][(Y)&1][(X)&15]) & 0xE0)     \
 427   |(((xmesa->xm_visual->hpcr_rgbTbl[1][G] + xmesa_HPCR_DRGB[1][(Y)&1][(X)&15]) & 0xE0)>>3) \
 428   | ((xmesa->xm_visual->hpcr_rgbTbl[2][B] + xmesa_HPCR_DRGB[2][(Y)&1][(X)&15])>>6)         \
 429   )
 430
 431
 432
 433 /**
 434  * If pixelformat==PF_1BIT:
 435  */
 436 extern const int xmesa_kernel1[16];
 437
 438 #define SETUP_1BIT  int bitFlip = xmesa->xm_visual->bitFlip
 439 #define DITHER_1BIT( X, Y, R, G, B )    \
 440         (( ((int)(R)+(int)(G)+(int)(B)) > xmesa_kernel1[(((Y)&3) << 2) | ((X)&3)] ) ^ bitFlip)
 441
 442
 443
 444 /**
 445  * If pixelformat==PF_GRAYSCALE:
 446  */
 447 #define GRAY_RGB( R, G, B )   XMESA_BUFFER(ctx->DrawBuffer)->color_table[((R) + (G) + (B))/3]
 448
 449
 450
 451 /**
 452  * Converts a GL window Y coord to an X window Y coord:
 453  */
 454 #define YFLIP(XRB, Y)  ((XRB)->bottom - (Y))
 455
 456
 457 /**
 458  * Return the address of a 1, 2 or 4-byte pixel in the buffer's XImage:
 459  * X==0 is left, Y==0 is bottom.
 460  */
 461 #define PIXEL_ADDR1(XRB, X, Y)  \
 462    ( (XRB)->origin1 - (Y) * (XRB)->width1 + (X) )
 463
 464 #define PIXEL_ADDR2(XRB, X, Y)  \
 465    ( (XRB)->origin2 - (Y) * (XRB)->width2 + (X) )
 466
 467 #define PIXEL_ADDR3(XRB, X, Y)  \
 468    ( (bgr_t *) ( (XRB)->origin3 - (Y) * (XRB)->width3 + 3 * (X) ))
 469
 470 #define PIXEL_ADDR4(XRB, X, Y)  \
 471    ( (XRB)->origin4 - (Y) * (XRB)->width4 + (X) )
 472
 473
 474
 475 /*
 476  * External functions:
 477  */
 478
 479 extern struct xmesa_renderbuffer *
 480 xmesa_new_renderbuffer(struct gl_context *ctx, GLuint name,
 481                        const struct xmesa_visual *xmvis,
 482                        GLboolean backBuffer);
 483
 484 extern void
 485 xmesa_delete_framebuffer(struct gl_framebuffer *fb);
 486
 487 extern XMesaBuffer
 488 xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis);
 489
 490 extern unsigned long
 491 xmesa_color_to_pixel( struct gl_context *ctx,
 492                       GLubyte r, GLubyte g, GLubyte b, GLubyte a,
 493                       GLuint pixelFormat );
 494
 495 extern void
 496 xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
 497                       GLuint *width, GLuint *height);
 498
 499 extern void
 500 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer);
 501
 502 extern void
 503 xmesa_init_driver_functions( XMesaVisual xmvisual,
 504                              struct dd_function_table *driver );
 505
 506 extern void
 507 xmesa_update_state( struct gl_context *ctx, GLbitfield new_state );
 508
 509 extern void
 510 xmesa_set_renderbuffer_funcs(struct xmesa_renderbuffer *xrb,
 511                              enum pixel_format pixelformat, GLint depth);
 512
 513 extern void
 514 xmesa_MapRenderbuffer(struct gl_context *ctx,
 515                       struct gl_renderbuffer *rb,
 516                       GLuint x, GLuint y, GLuint w, GLuint h,
 517                       GLbitfield mode,
 518                       GLubyte **mapOut, GLint *rowStrideOut);
 519
 520 extern void
 521 xmesa_UnmapRenderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb);
 522
 523 extern void
 524 xmesa_destroy_buffers_on_display(XMesaDisplay *dpy);
 525
 526
 527 /**
 528  * Using a function instead of an ordinary cast is safer.
 529  */
 530 static INLINE struct xmesa_renderbuffer *
 531 xmesa_renderbuffer(struct gl_renderbuffer *rb)
 532 {
 533    return (struct xmesa_renderbuffer *) rb;
 534 }
 535
 536
 537 /**
 538  * Return pointer to XMesaContext corresponding to a Mesa struct gl_context.
 539  * Since we're using structure containment, it's just a cast!.
 540  */
 541 static INLINE XMesaContext
 542 XMESA_CONTEXT(struct gl_context *ctx)
 543 {
 544    return (XMesaContext) ctx;
 545 }
 546
 547
 548 /**
 549  * Return pointer to XMesaBuffer corresponding to a Mesa struct gl_framebuffer.
 550  * Since we're using structure containment, it's just a cast!.
 551  */
 552 static INLINE XMesaBuffer
 553 XMESA_BUFFER(struct gl_framebuffer *b)
 554 {
 555    return (XMesaBuffer) b;
 556 }
 557
 558
 559 /* Plugged into the software rasterizer.  Try to use internal
 560  * swrast-style point, line and triangle functions.
 561  */
 562 extern void xmesa_choose_point( struct gl_context *ctx );
 563 extern void xmesa_choose_line( struct gl_context *ctx );
 564 extern void xmesa_choose_triangle( struct gl_context *ctx );
 565
 566
 567 extern void xmesa_register_swrast_functions( struct gl_context *ctx );
 568
 569
 570
 571 #define ENABLE_EXT_texure_compression_s3tc 0 /* SW texture compression */
 572
 573 #if   defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
 574 #define ENABLE_EXT_timer_query 1 /* should have 64-bit GLuint64EXT */
 575 #else
 576 #define ENABLE_EXT_timer_query 0 /* may not have 64-bit GLuint64EXT */
 577 #endif
 578
 579
 580 #define TEST_META_FUNCS 0
 581
 582
 583 #endif