src/mesa/pipe/xlib/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 "GL/xmesa.h"
  31 #include "mtypes.h"
  32 #ifdef XFree86Server
  33 #include "xm_image.h"
  34 #endif
  35 #include "state_tracker/st_cb_fbo.h"
  36 #include "pipe/softpipe/sp_context.h"
  37 #include "pipe/softpipe/sp_surface.h"
  38
  39
  40 extern _glthread_Mutex _xmesa_lock;
  41
  42 extern XMesaBuffer XMesaBufferList;
  43
  44 /* for PF_8R8G8B24 pixel format */
  45 typedef struct {
  46    GLubyte b;
  47    GLubyte g;
  48    GLubyte r;
  49 } bgr_t;
  50
  51
  52 struct xmesa_renderbuffer;
  53
  54
  55 /* Function pointer for clearing color buffers */
  56 typedef void (*ClearFunc)( GLcontext *ctx, struct xmesa_renderbuffer *xrb,
  57                            GLuint value );
  58
  59
  60
  61
  62 /** Framebuffer pixel formats */
  63 enum pixel_format {
  64    PF_Index,            /**< Color Index mode */
  65    PF_Truecolor,        /**< TrueColor or DirectColor, any depth */
  66    PF_Dither_True,      /**< TrueColor with dithering */
  67    PF_8A8R8G8B,         /**< 32-bit TrueColor:  8-A, 8-R, 8-G, 8-B bits */
  68    PF_8A8B8G8R,         /**< 32-bit TrueColor:  8-A, 8-B, 8-G, 8-R bits */
  69    PF_8R8G8B,           /**< 32-bit TrueColor:  8-R, 8-G, 8-B bits */
  70    PF_8R8G8B24,         /**< 24-bit TrueColor:  8-R, 8-G, 8-B bits */
  71    PF_5R6G5B,           /**< 16-bit TrueColor:  5-R, 6-G, 5-B bits */
  72    PF_Dither,           /**< Color-mapped RGB with dither */
  73    PF_Lookup,           /**< Color-mapped RGB without dither */
  74    PF_HPCR,             /**< HP Color Recovery (ad@lms.be 30/08/95) */
  75    PF_1Bit,             /**< monochrome dithering of RGB */
  76    PF_Grayscale,        /**< Grayscale or StaticGray */
  77    PF_Dither_5R6G5B     /**< 16-bit dithered TrueColor: 5-R, 6-G, 5-B */
  78 };
  79
  80
  81 /**
  82  * Visual inforation, derived from GLvisual.
  83  * Basically corresponds to an XVisualInfo.
  84  */
  85 struct xmesa_visual {
  86    GLvisual mesa_visual;        /* Device independent visual parameters */
  87    XMesaDisplay *display;       /* The X11 display */
  88 #ifdef XFree86Server
  89    GLint ColormapEntries;
  90    GLint nplanes;
  91 #else
  92    XMesaVisualInfo visinfo;     /* X's visual info (pointer to private copy) */
  93    XVisualInfo *vishandle;      /* Only used in fakeglx.c */
  94 #endif
  95    GLint BitsPerPixel;          /* True bits per pixel for XImages */
  96
  97    GLboolean ximage_flag;       /* Use XImage for back buffer (not pixmap)? */
  98
  99    enum pixel_format dithered_pf;  /* Pixel format when dithering */
 100    enum pixel_format undithered_pf;/* Pixel format when not dithering */
 101
 102    GLfloat RedGamma;            /* Gamma values, 1.0 is default */
 103    GLfloat GreenGamma;
 104    GLfloat BlueGamma;
 105
 106    /* For PF_TRUECOLOR */
 107    GLint rshift, gshift, bshift;/* Pixel color component shifts */
 108    GLubyte Kernel[16];          /* Dither kernel */
 109    unsigned long RtoPixel[512]; /* RGB to pixel conversion */
 110    unsigned long GtoPixel[512];
 111    unsigned long BtoPixel[512];
 112    GLubyte PixelToR[256];       /* Pixel to RGB conversion */
 113    GLubyte PixelToG[256];
 114    GLubyte PixelToB[256];
 115
 116    /* For PF_HPCR */
 117    short       hpcr_rgbTbl[3][256];
 118    GLboolean   hpcr_clear_flag;
 119    GLubyte     hpcr_clear_ximage_pattern[2][16];
 120    XMesaImage *hpcr_clear_ximage;
 121    XMesaPixmap hpcr_clear_pixmap;
 122
 123    /* For PF_1BIT */
 124    int bitFlip;
 125 };
 126
 127
 128 /**
 129  * Context info, dDerived from GLcontext.
 130  * Basically corresponds to a GLXContext.
 131  */
 132 struct xmesa_context {
 133    GLcontext mesa;              /* the core library context (containment) */
 134    XMesaVisual xm_visual;       /* Describes the buffers */
 135    XMesaBuffer xm_buffer;       /* current span/point/line/triangle buffer */
 136
 137    XMesaDisplay *display;       /* == xm_visual->display */
 138    GLboolean swapbytes;         /* Host byte order != display byte order? */
 139    GLboolean direct;            /* Direct rendering context? */
 140
 141    enum pixel_format pixelformat;
 142
 143    GLubyte clearcolor[4];               /* current clearing color */
 144    unsigned long clearpixel;            /* current clearing pixel value */
 145 };
 146
 147
 148 /**
 149  * Types of X/GLX drawables we might render into.
 150  */
 151 typedef enum {
 152    WINDOW,          /* An X window */
 153    GLXWINDOW,       /* GLX window */
 154    PIXMAP,          /* GLX pixmap */
 155    PBUFFER          /* GLX Pbuffer */
 156 } BufferType;
 157
 158
 159 /** Values for db_mode: */
 160 /*@{*/
 161 #define BACK_PIXMAP     1
 162 #define BACK_XIMAGE     2
 163 /*@}*/
 164
 165
 166 /**
 167  * An xmesa_renderbuffer represents the back or front color buffer.
 168  * For the front color buffer:
 169  *    <drawable> is the X window
 170  * For the back color buffer:
 171  *    Either <ximage> or <pixmap> will be used, never both.
 172  * In any case, <drawable> always equals <pixmap>.
 173  * For stand-alone Mesa, we could merge <drawable> and <pixmap> into one
 174  * field.  We don't do that for the server-side GLcore module because
 175  * pixmaps and drawables are different and we'd need a bunch of casts.
 176  */
 177 struct xmesa_renderbuffer
 178 {
 179 #if 0
 180    struct gl_renderbuffer Base;  /* Base class */
 181 #else
 182    struct st_renderbuffer St; /**< Base class */
 183 #endif
 184
 185    XMesaBuffer Parent;  /**< The XMesaBuffer this renderbuffer belongs to */
 186    XMesaDrawable drawable;      /* Usually the X window ID */
 187    XMesaPixmap pixmap;  /* Back color buffer */
 188    XMesaImage *ximage;  /* The back buffer, if not using a Pixmap */
 189
 190    GLubyte *origin1;    /* used for PIXEL_ADDR1 macro */
 191    GLint width1;
 192    GLushort *origin2;   /* used for PIXEL_ADDR2 macro */
 193    GLint width2;
 194    GLubyte *origin3;    /* used for PIXEL_ADDR3 macro */
 195    GLint width3;
 196    GLuint *origin4;     /* used for PIXEL_ADDR4 macro */
 197    GLint width4;
 198
 199    GLint bottom;        /* used for FLIP macro, equals height - 1 */
 200
 201    ClearFunc clearFunc;
 202
 203    void *pSurface;      /** pipe surface */
 204 };
 205
 206
 207 /**
 208  * Framebuffer information, derived from.
 209  * Basically corresponds to a GLXDrawable.
 210  */
 211 struct xmesa_buffer {
 212    GLframebuffer mesa_buffer;   /* depth, stencil, accum, etc buffers */
 213                                 /* This MUST BE FIRST! */
 214    GLboolean wasCurrent;        /* was ever the current buffer? */
 215    XMesaVisual xm_visual;       /* the X/Mesa visual */
 216
 217    XMesaDisplay *display;
 218    BufferType type;             /* window, pixmap, pbuffer or glxwindow */
 219
 220    struct xmesa_renderbuffer *frontxrb; /* front color renderbuffer */
 221    struct xmesa_renderbuffer *backxrb;  /* back color renderbuffer */
 222
 223    XMesaColormap cmap;          /* the X colormap */
 224
 225    unsigned long selectedEvents;/* for pbuffers only */
 226
 227    GLint db_mode;               /* 0 = single buffered */
 228                                 /* BACK_PIXMAP = use Pixmap for back buffer */
 229                                 /* BACK_XIMAGE = use XImage for back buffer */
 230    GLboolean swAlpha;
 231
 232    GLuint shm;                  /* X Shared Memory extension status:    */
 233                                 /*    0 = not available                 */
 234                                 /*    1 = XImage support available      */
 235                                 /*    2 = Pixmap support available too  */
 236 #if defined(USE_XSHM) && !defined(XFree86Server)
 237    XShmSegmentInfo shminfo;
 238 #endif
 239
 240    XMesaImage *rowimage;        /* Used for optimized span writing */
 241    XMesaPixmap stipple_pixmap;  /* For polygon stippling */
 242    XMesaGC stipple_gc;          /* For polygon stippling */
 243
 244    XMesaGC gc;                  /* scratch GC for span, line, tri drawing */
 245    XMesaGC cleargc;             /* GC for clearing the color buffer */
 246    XMesaGC swapgc;              /* GC for swapping the color buffers */
 247
 248    /* The following are here instead of in the XMesaVisual
 249     * because they depend on the window's colormap.
 250     */
 251
 252    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 253    unsigned long color_table[576];      /* RGB -> pixel value */
 254
 255    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 256    GLubyte pixel_to_r[65536];           /* pixel value -> red */
 257    GLubyte pixel_to_g[65536];           /* pixel value -> green */
 258    GLubyte pixel_to_b[65536];           /* pixel value -> blue */
 259
 260    /* Used to do XAllocColor/XFreeColors accounting: */
 261    int num_alloced;
 262 #if defined(XFree86Server)
 263    Pixel alloced_colors[256];
 264 #else
 265    unsigned long alloced_colors[256];
 266 #endif
 267
 268    /* GLX_EXT_texture_from_pixmap */
 269    GLint TextureTarget; /** GLX_TEXTURE_1D_EXT, for example */
 270    GLint TextureFormat; /** GLX_TEXTURE_FORMAT_RGB_EXT, for example */
 271    GLint TextureMipmap; /** 0 or 1 */
 272
 273    struct xmesa_buffer *Next;   /* Linked list pointer: */
 274 };
 275
 276
 277 /**
 278  * If pixelformat==PF_TRUECOLOR:
 279  */
 280 #define PACK_TRUECOLOR( PIXEL, R, G, B )        \
 281    PIXEL = xmesa->xm_visual->RtoPixel[R]        \
 282          | xmesa->xm_visual->GtoPixel[G]        \
 283          | xmesa->xm_visual->BtoPixel[B];       \
 284
 285
 286 /**
 287  * If pixelformat==PF_TRUEDITHER:
 288  */
 289 #define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B )                 \
 290 {                                                               \
 291    int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)];    \
 292    PIXEL = xmesa->xm_visual->RtoPixel[(R)+d]                    \
 293          | xmesa->xm_visual->GtoPixel[(G)+d]                    \
 294          | xmesa->xm_visual->BtoPixel[(B)+d];                   \
 295 }
 296
 297
 298
 299 /**
 300  * If pixelformat==PF_8A8B8G8R:
 301  */
 302 #define PACK_8A8B8G8R( R, G, B, A )     \
 303         ( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
 304
 305
 306 /**
 307  * Like PACK_8A8B8G8R() but don't use alpha.  This is usually an acceptable
 308  * shortcut.
 309  */
 310 #define PACK_8B8G8R( R, G, B )   ( ((B) << 16) | ((G) << 8) | (R) )
 311
 312
 313
 314 /**
 315  * If pixelformat==PF_8R8G8B:
 316  */
 317 #define PACK_8R8G8B( R, G, B)    ( ((R) << 16) | ((G) << 8) | (B) )
 318
 319
 320 /**
 321  * If pixelformat==PF_5R6G5B:
 322  */
 323 #define PACK_5R6G5B( R, G, B)    ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
 324
 325
 326 /**
 327  * If pixelformat==PF_8A8R8G8B:
 328  */
 329 #define PACK_8A8R8G8B( R, G, B, A )     \
 330         ( ((A) << 24) | ((R) << 16) | ((G) << 8) | (B) )
 331
 332
 333
 334 /**
 335  * If pixelformat==PF_DITHER:
 336  *
 337  * Improved 8-bit RGB dithering code contributed by Bob Mercier
 338  * (mercier@hollywood.cinenet.net).  Thanks Bob!
 339  */
 340 #ifdef DITHER666
 341 # define DITH_R   6
 342 # define DITH_G   6
 343 # define DITH_B   6
 344 # define DITH_MIX(r,g,b)  (((r) * DITH_G + (g)) * DITH_B + (b))
 345 #else
 346 # define DITH_R 5
 347 # define DITH_G 9
 348 # define DITH_B 5
 349 # define DITH_MIX(r,g,b)  (((g) << 6) | ((b) << 3) | (r))
 350 #endif
 351 #define DITH_DX 4
 352 #define DITH_DY 4
 353 #define DITH_N  (DITH_DX * DITH_DY)
 354
 355 #define _dither(C, c, d)   (((unsigned)((DITH_N * (C - 1) + 1) * c + d)) >> 12)
 356
 357 #define MAXC    256
 358 extern const int xmesa_kernel8[DITH_DY * DITH_DX];
 359
 360 /* Dither for random X,Y */
 361 #define DITHER_SETUP                                            \
 362         int __d;                                                \
 363         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;
 364
 365 #define DITHER( X, Y, R, G, B )                         \
 366         (__d = xmesa_kernel8[(((Y)&3)<<2) | ((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 /* Dither for random X, fixed Y */
 372 #define XDITHER_SETUP(Y)                                        \
 373         int __d;                                                \
 374         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;     \
 375         const int *kernel = &xmesa_kernel8[ ((Y)&3) << 2 ];
 376
 377 #define XDITHER( X, R, G, B )                           \
 378         (__d = kernel[(X)&3],                           \
 379         ctable[DITH_MIX(_dither(DITH_R, (R), __d),      \
 380                         _dither(DITH_G, (G), __d),      \
 381                         _dither(DITH_B, (B), __d))])
 382
 383
 384
 385 /*
 386  * Dithering for flat-shaded triangles.  Precompute all 16 possible
 387  * pixel values given the triangle's RGB color.  Contributed by Martin Shenk.
 388  */
 389 #define FLAT_DITHER_SETUP( R, G, B )                                    \
 390         GLushort ditherValues[16];                                      \
 391         {                                                               \
 392            unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;  \
 393            int msdr = (DITH_N*((DITH_R)-1)+1) * (R);                    \
 394            int msdg = (DITH_N*((DITH_G)-1)+1) * (G);                    \
 395            int msdb = (DITH_N*((DITH_B)-1)+1) * (B);                    \
 396            int i;                                                       \
 397            for (i=0;i<16;i++) {                                         \
 398               int k = xmesa_kernel8[i];                                 \
 399               int j = DITH_MIX( (msdr+k)>>12, (msdg+k)>>12, (msdb+k)>>12 );\
 400               ditherValues[i] = (GLushort) ctable[j];                   \
 401            }                                                            \
 402         }
 403
 404 #define FLAT_DITHER_ROW_SETUP(Y)                                        \
 405         GLushort *ditherRow = ditherValues + ( ((Y)&3) << 2);
 406
 407 #define FLAT_DITHER(X)  ditherRow[(X)&3]
 408
 409
 410
 411 /**
 412  * If pixelformat==PF_LOOKUP:
 413  */
 414 #define _dither_lookup(C, c)   (((unsigned)((DITH_N * (C - 1) + 1) * c)) >> 12)
 415
 416 #define LOOKUP_SETUP                                            \
 417         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table
 418
 419 #define LOOKUP( R, G, B )                               \
 420         ctable[DITH_MIX(_dither_lookup(DITH_R, (R)),    \
 421                         _dither_lookup(DITH_G, (G)),    \
 422                         _dither_lookup(DITH_B, (B)))]
 423
 424
 425 /**
 426  * If pixelformat==PF_HPCR:
 427  *
 428  *      HP Color Recovery dithering               (ad@lms.be 30/08/95)
 429  *      HP has on it's 8-bit 700-series computers, a feature called
 430  *      'Color Recovery'.  This allows near 24-bit output (so they say).
 431  *      It is enabled by selecting the 8-bit  TrueColor  visual AND
 432  *      corresponding  colormap (see tkInitWindow) AND doing some special
 433  *      dither.
 434  */
 435 extern const short xmesa_HPCR_DRGB[3][2][16];
 436
 437 #define DITHER_HPCR( X, Y, R, G, B )                                       \
 438   ( ((xmesa->xm_visual->hpcr_rgbTbl[0][R] + xmesa_HPCR_DRGB[0][(Y)&1][(X)&15]) & 0xE0)     \
 439   |(((xmesa->xm_visual->hpcr_rgbTbl[1][G] + xmesa_HPCR_DRGB[1][(Y)&1][(X)&15]) & 0xE0)>>3) \
 440   | ((xmesa->xm_visual->hpcr_rgbTbl[2][B] + xmesa_HPCR_DRGB[2][(Y)&1][(X)&15])>>6)         \
 441   )
 442
 443
 444
 445 /**
 446  * If pixelformat==PF_1BIT:
 447  */
 448 extern const int xmesa_kernel1[16];
 449
 450 #define SETUP_1BIT  int bitFlip = xmesa->xm_visual->bitFlip
 451 #define DITHER_1BIT( X, Y, R, G, B )    \
 452         (( ((int)(R)+(int)(G)+(int)(B)) > xmesa_kernel1[(((Y)&3) << 2) | ((X)&3)] ) ^ bitFlip)
 453
 454
 455
 456 /**
 457  * If pixelformat==PF_GRAYSCALE:
 458  */
 459 #define GRAY_RGB( R, G, B )   XMESA_BUFFER(ctx->DrawBuffer)->color_table[((R) + (G) + (B))/3]
 460
 461
 462
 463 /**
 464  * Converts a GL window Y coord to an X window Y coord:
 465  */
 466 #define YFLIP(XRB, Y)  ((XRB)->bottom - (Y))
 467
 468
 469 /**
 470  * Return the address of a 1, 2 or 4-byte pixel in the buffer's XImage:
 471  * X==0 is left, Y==0 is bottom.
 472  */
 473 #define PIXEL_ADDR1(XRB, X, Y)  \
 474    ( (XRB)->origin1 - (Y) * (XRB)->width1 + (X) )
 475
 476 #define PIXEL_ADDR2(XRB, X, Y)  \
 477    ( (XRB)->origin2 - (Y) * (XRB)->width2 + (X) )
 478
 479 #define PIXEL_ADDR3(XRB, X, Y)  \
 480    ( (bgr_t *) ( (XRB)->origin3 - (Y) * (XRB)->width3 + 3 * (X) ))
 481
 482 #define PIXEL_ADDR4(XRB, X, Y)  \
 483    ( (XRB)->origin4 - (Y) * (XRB)->width4 + (X) )
 484
 485
 486
 487 /*
 488  * External functions:
 489  */
 490
 491 extern struct xmesa_renderbuffer *
 492 xmesa_create_renderbuffer(GLcontext *ctx, GLuint name, const GLvisual *visual,
 493                           GLboolean backBuffer);
 494
 495 extern void
 496 xmesa_delete_framebuffer(struct gl_framebuffer *fb);
 497
 498 extern XMesaBuffer
 499 xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis);
 500
 501 extern unsigned long
 502 xmesa_color_to_pixel( GLcontext *ctx,
 503                       GLubyte r, GLubyte g, GLubyte b, GLubyte a,
 504                       GLuint pixelFormat );
 505
 506 extern void
 507 xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
 508                       GLuint *width, GLuint *height);
 509
 510 extern void
 511 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer);
 512
 513 extern void
 514 xmesa_init_driver_functions( XMesaVisual xmvisual,
 515                              struct dd_function_table *driver );
 516
 517 extern void
 518 xmesa_update_state( GLcontext *ctx, GLbitfield new_state );
 519
 520 extern void
 521 xmesa_set_renderbuffer_funcs(struct xmesa_renderbuffer *xrb,
 522                              enum pixel_format pixelformat, GLint depth);
 523
 524 extern void
 525 xmesa_destroy_buffers_on_display(XMesaDisplay *dpy);
 526
 527
 528 /**
 529  * Using a function instead of an ordinary cast is safer.
 530  */
 531 static INLINE struct xmesa_renderbuffer *
 532 xmesa_renderbuffer(struct gl_renderbuffer *rb)
 533 {
 534    return (struct xmesa_renderbuffer *) rb;
 535 }
 536
 537
 538 /**
 539  * Return pointer to XMesaContext corresponding to a Mesa GLcontext.
 540  * Since we're using structure containment, it's just a cast!.
 541  * XXX should use inlined function for better type safety.
 542  */
 543 static INLINE XMesaContext
 544 XMESA_CONTEXT(GLcontext *ctx)
 545 {
 546    return (XMesaContext) ctx;
 547 }
 548
 549
 550 /**
 551  * Return pointer to XMesaBuffer corresponding to a Mesa GLframebuffer.
 552  * Since we're using structure containment, it's just a cast!.
 553  * XXX should use inlined function for better type safety.
 554  */
 555 static INLINE XMesaBuffer
 556 XMESA_BUFFER(GLframebuffer *b)
 557 {
 558    return (XMesaBuffer) b;
 559 }
 560
 561
 562
 563 #define ENABLE_EXT_texure_compression_s3tc 0 /* SW texture compression */
 564
 565 #ifdef XFree86Server
 566 #define ENABLE_EXT_timer_query 0
 567 #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
 568 #define ENABLE_EXT_timer_query 1 /* should have 64-bit GLuint64EXT */
 569 #else
 570 #define ENABLE_EXT_timer_query 0 /* may not have 64-bit GLuint64EXT */
 571 #endif
 572
 573
 574 struct pipe_surface;
 575 struct pipe_context;
 576
 577 struct xmesa_surface
 578 {
 579    struct pipe_surface surface;
 580    struct xmesa_renderbuffer *xrb;
 581 };
 582
 583
 584 extern void
 585 xmesa_clear(struct pipe_context *pipe, struct pipe_surface *ps, GLuint value);
 586
 587 extern struct pipe_context *
 588 xmesa_create_softpipe(XMesaContext xm);
 589
 590 extern struct pipe_surface *
 591 xmesa_surface_alloc(struct pipe_context *pipe, GLuint format);
 592
 593 extern struct pipe_surface *
 594 xmesa_new_color_surface(struct pipe_context *pipe, GLuint format);
 595
 596 extern boolean
 597 xmesa_is_format_supported(struct pipe_context *pipe, uint format);
 598
 599 extern void
 600 xmesa_get_tile_rgba(struct pipe_context *pipe, struct pipe_surface *ps,
 601                     uint x, uint y, uint w, uint h, float *p);
 602
 603 extern void
 604 xmesa_put_tile_rgba(struct pipe_context *pipe, struct pipe_surface *ps,
 605                     uint x, uint y, uint w, uint h, const float *p);
 606
 607 #endif