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 "GL/xmesa.h"
  31 #include "main/mtypes.h"
  32 #if defined(FX)
  33 #include "GL/fxmesa.h"
  34 #include "xm_glide.h"
  35 #endif
  36 #ifdef XFree86Server
  37 #include "xm_image.h"
  38 #endif
  39 #include "state_tracker/st_cb_fbo.h"
  40 #include "softpipe/sp_context.h"
  41 #include "softpipe/sp_surface.h"
  42
  43
  44 extern _glthread_Mutex _xmesa_lock;
  45
  46 extern XMesaBuffer XMesaBufferList;
  47
  48 /* for PF_8R8G8B24 pixel format */
  49 typedef struct {
  50    GLubyte b;
  51    GLubyte g;
  52    GLubyte r;
  53 } bgr_t;
  54
  55
  56 struct xmesa_renderbuffer;
  57
  58
  59 /* Function pointer for clearing color buffers */
  60 typedef void (*ClearFunc)( GLcontext *ctx, struct xmesa_renderbuffer *xrb,
  61                            GLint x, GLint y, GLint width, GLint height );
  62
  63
  64
  65
  66 /** Framebuffer pixel formats */
  67 enum pixel_format {
  68    PF_Index,            /**< Color Index mode */
  69    PF_Truecolor,        /**< TrueColor or DirectColor, any depth */
  70    PF_Dither_True,      /**< TrueColor with dithering */
  71    PF_8A8R8G8B,         /**< 32-bit TrueColor:  8-A, 8-R, 8-G, 8-B bits */
  72    PF_8A8B8G8R,         /**< 32-bit TrueColor:  8-A, 8-B, 8-G, 8-R bits */
  73    PF_8R8G8B,           /**< 32-bit TrueColor:  8-R, 8-G, 8-B bits */
  74    PF_8R8G8B24,         /**< 24-bit TrueColor:  8-R, 8-G, 8-B bits */
  75    PF_5R6G5B,           /**< 16-bit TrueColor:  5-R, 6-G, 5-B bits */
  76    PF_Dither,           /**< Color-mapped RGB with dither */
  77    PF_Lookup,           /**< Color-mapped RGB without dither */
  78    PF_HPCR,             /**< HP Color Recovery (ad@lms.be 30/08/95) */
  79    PF_1Bit,             /**< monochrome dithering of RGB */
  80    PF_Grayscale,        /**< Grayscale or StaticGray */
  81    PF_Dither_5R6G5B     /**< 16-bit dithered TrueColor: 5-R, 6-G, 5-B */
  82 };
  83
  84
  85 /**
  86  * Visual inforation, derived from GLvisual.
  87  * Basically corresponds to an XVisualInfo.
  88  */
  89 struct xmesa_visual {
  90    GLvisual mesa_visual;        /* Device independent visual parameters */
  91    XMesaDisplay *display;       /* The X11 display */
  92 #ifdef XFree86Server
  93    GLint ColormapEntries;
  94    GLint nplanes;
  95 #else
  96    XMesaVisualInfo visinfo;     /* X's visual info (pointer to private copy) */
  97    XVisualInfo *vishandle;      /* Only used in fakeglx.c */
  98 #endif
  99    GLint BitsPerPixel;          /* True bits per pixel for XImages */
 100
 101    GLboolean ximage_flag;       /* Use XImage for back buffer (not pixmap)? */
 102
 103    enum pixel_format dithered_pf;  /* Pixel format when dithering */
 104    enum pixel_format undithered_pf;/* Pixel format when not dithering */
 105
 106    GLfloat RedGamma;            /* Gamma values, 1.0 is default */
 107    GLfloat GreenGamma;
 108    GLfloat BlueGamma;
 109
 110    /* For PF_TRUECOLOR */
 111    GLint rshift, gshift, bshift;/* Pixel color component shifts */
 112    GLubyte Kernel[16];          /* Dither kernel */
 113    unsigned long RtoPixel[512]; /* RGB to pixel conversion */
 114    unsigned long GtoPixel[512];
 115    unsigned long BtoPixel[512];
 116    GLubyte PixelToR[256];       /* Pixel to RGB conversion */
 117    GLubyte PixelToG[256];
 118    GLubyte PixelToB[256];
 119
 120    /* For PF_HPCR */
 121    short       hpcr_rgbTbl[3][256];
 122    GLboolean   hpcr_clear_flag;
 123    GLubyte     hpcr_clear_ximage_pattern[2][16];
 124    XMesaImage *hpcr_clear_ximage;
 125    XMesaPixmap hpcr_clear_pixmap;
 126
 127    /* For PF_1BIT */
 128    int bitFlip;
 129 };
 130
 131
 132 /**
 133  * Context info, derived from GLcontext.
 134  * Basically corresponds to a GLXContext.
 135  */
 136 struct xmesa_context {
 137    GLcontext mesa;              /* the core library context (containment) */
 138    XMesaVisual xm_visual;       /* Describes the buffers */
 139    XMesaBuffer xm_buffer;       /* current span/point/line/triangle buffer */
 140
 141    XMesaDisplay *display;       /* == xm_visual->display */
 142    GLboolean swapbytes;         /* Host byte order != display byte order? */
 143    GLboolean direct;            /* Direct rendering context? */
 144
 145    enum pixel_format pixelformat;
 146
 147    GLubyte clearcolor[4];               /* current clearing color */
 148    unsigned long clearpixel;            /* current clearing pixel value */
 149 };
 150
 151
 152 /**
 153  * Types of X/GLX drawables we might render into.
 154  */
 155 typedef enum {
 156    WINDOW,          /* An X window */
 157    GLXWINDOW,       /* GLX window */
 158    PIXMAP,          /* GLX pixmap */
 159    PBUFFER          /* GLX Pbuffer */
 160 } BufferType;
 161
 162
 163 /** Values for db_mode: */
 164 /*@{*/
 165 #define BACK_PIXMAP     1
 166 #define BACK_XIMAGE     2
 167 /*@}*/
 168
 169
 170 /**
 171  * An xmesa_renderbuffer represents the back or front color buffer.
 172  * For the front color buffer:
 173  *    <drawable> is the X window
 174  * For the back color buffer:
 175  *    Either <ximage> or <pixmap> will be used, never both.
 176  * In any case, <drawable> always equals <pixmap>.
 177  * For stand-alone Mesa, we could merge <drawable> and <pixmap> into one
 178  * field.  We don't do that for the server-side GLcore module because
 179  * pixmaps and drawables are different and we'd need a bunch of casts.
 180  */
 181 struct xmesa_renderbuffer
 182 {
 183 #if 0
 184    struct gl_renderbuffer Base;  /* Base class */
 185 #else
 186    struct st_renderbuffer St; /**< Base class */
 187 #endif
 188
 189    XMesaBuffer Parent;  /**< The XMesaBuffer this renderbuffer belongs to */
 190    XMesaDrawable drawable;      /* Usually the X window ID */
 191    XMesaPixmap pixmap;  /* Back color buffer */
 192    XMesaImage *ximage;  /* The back buffer, if not using a Pixmap */
 193
 194    GLubyte *origin1;    /* used for PIXEL_ADDR1 macro */
 195    GLint width1;
 196    GLushort *origin2;   /* used for PIXEL_ADDR2 macro */
 197    GLint width2;
 198    GLubyte *origin3;    /* used for PIXEL_ADDR3 macro */
 199    GLint width3;
 200    GLuint *origin4;     /* used for PIXEL_ADDR4 macro */
 201    GLint width4;
 202
 203    GLint bottom;        /* used for FLIP macro, equals height - 1 */
 204
 205    ClearFunc clearFunc;
 206
 207    void *pSurface;      /** pipe surface */
 208 };
 209
 210
 211 /**
 212  * Framebuffer information, derived from.
 213  * Basically corresponds to a GLXDrawable.
 214  */
 215 struct xmesa_buffer {
 216    GLframebuffer mesa_buffer;   /* depth, stencil, accum, etc buffers */
 217                                 /* This MUST BE FIRST! */
 218    GLboolean wasCurrent;        /* was ever the current buffer? */
 219    XMesaVisual xm_visual;       /* the X/Mesa visual */
 220
 221    XMesaDisplay *display;
 222    BufferType type;             /* window, pixmap, pbuffer or glxwindow */
 223
 224    struct xmesa_renderbuffer *frontxrb; /* front color renderbuffer */
 225    struct xmesa_renderbuffer *backxrb;  /* back color renderbuffer */
 226
 227    XMesaColormap cmap;          /* the X colormap */
 228
 229    unsigned long selectedEvents;/* for pbuffers only */
 230
 231    GLint db_mode;               /* 0 = single buffered */
 232                                 /* BACK_PIXMAP = use Pixmap for back buffer */
 233                                 /* BACK_XIMAGE = use XImage for back buffer */
 234    GLboolean swAlpha;
 235
 236    GLuint shm;                  /* X Shared Memory extension status:    */
 237                                 /*    0 = not available                 */
 238                                 /*    1 = XImage support available      */
 239                                 /*    2 = Pixmap support available too  */
 240 #if defined(USE_XSHM) && !defined(XFree86Server)
 241    XShmSegmentInfo shminfo;
 242 #endif
 243
 244    XMesaImage *rowimage;        /* Used for optimized span writing */
 245    XMesaPixmap stipple_pixmap;  /* For polygon stippling */
 246    XMesaGC stipple_gc;          /* For polygon stippling */
 247
 248    XMesaGC gc;                  /* scratch GC for span, line, tri drawing */
 249    XMesaGC cleargc;             /* GC for clearing the color buffer */
 250    XMesaGC swapgc;              /* GC for swapping the color buffers */
 251
 252    /* The following are here instead of in the XMesaVisual
 253     * because they depend on the window's colormap.
 254     */
 255
 256    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 257    unsigned long color_table[576];      /* RGB -> pixel value */
 258
 259    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 260    GLubyte pixel_to_r[65536];           /* pixel value -> red */
 261    GLubyte pixel_to_g[65536];           /* pixel value -> green */
 262    GLubyte pixel_to_b[65536];           /* pixel value -> blue */
 263
 264    /* Used to do XAllocColor/XFreeColors accounting: */
 265    int num_alloced;
 266 #if defined(XFree86Server)
 267    Pixel alloced_colors[256];
 268 #else
 269    unsigned long alloced_colors[256];
 270 #endif
 271
 272 #if defined( FX )
 273    /* For 3Dfx Glide only */
 274    GLboolean FXisHackUsable;    /* Can we render into window? */
 275    GLboolean FXwindowHack;      /* Are we rendering into a window? */
 276    fxMesaContext FXctx;
 277 #endif
 278
 279    /* GLX_EXT_texture_from_pixmap */
 280    GLint TextureTarget; /** GLX_TEXTURE_1D_EXT, for example */
 281    GLint TextureFormat; /** GLX_TEXTURE_FORMAT_RGB_EXT, for example */
 282    GLint TextureMipmap; /** 0 or 1 */
 283
 284    struct xmesa_buffer *Next;   /* Linked list pointer: */
 285 };
 286
 287
 288 /**
 289  * If pixelformat==PF_TRUECOLOR:
 290  */
 291 #define PACK_TRUECOLOR( PIXEL, R, G, B )        \
 292    PIXEL = xmesa->xm_visual->RtoPixel[R]        \
 293          | xmesa->xm_visual->GtoPixel[G]        \
 294          | xmesa->xm_visual->BtoPixel[B];       \
 295
 296
 297 /**
 298  * If pixelformat==PF_TRUEDITHER:
 299  */
 300 #define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B )                 \
 301 {                                                               \
 302    int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)];    \
 303    PIXEL = xmesa->xm_visual->RtoPixel[(R)+d]                    \
 304          | xmesa->xm_visual->GtoPixel[(G)+d]                    \
 305          | xmesa->xm_visual->BtoPixel[(B)+d];                   \
 306 }
 307
 308
 309
 310 /**
 311  * If pixelformat==PF_8A8B8G8R:
 312  */
 313 #define PACK_8A8B8G8R( R, G, B, A )     \
 314         ( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
 315
 316
 317 /**
 318  * Like PACK_8A8B8G8R() but don't use alpha.  This is usually an acceptable
 319  * shortcut.
 320  */
 321 #define PACK_8B8G8R( R, G, B )   ( ((B) << 16) | ((G) << 8) | (R) )
 322
 323
 324
 325 /**
 326  * If pixelformat==PF_8R8G8B:
 327  */
 328 #define PACK_8R8G8B( R, G, B)    ( ((R) << 16) | ((G) << 8) | (B) )
 329
 330
 331 /**
 332  * If pixelformat==PF_5R6G5B:
 333  */
 334 #define PACK_5R6G5B( R, G, B)    ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
 335
 336
 337 /**
 338  * If pixelformat==PF_8A8R8G8B:
 339  */
 340 #define PACK_8A8R8G8B( R, G, B, A )     \
 341         ( ((A) << 24) | ((R) << 16) | ((G) << 8) | (B) )
 342
 343
 344
 345 /**
 346  * If pixelformat==PF_DITHER:
 347  *
 348  * Improved 8-bit RGB dithering code contributed by Bob Mercier
 349  * (mercier@hollywood.cinenet.net).  Thanks Bob!
 350  */
 351 #ifdef DITHER666
 352 # define DITH_R   6
 353 # define DITH_G   6
 354 # define DITH_B   6
 355 # define DITH_MIX(r,g,b)  (((r) * DITH_G + (g)) * DITH_B + (b))
 356 #else
 357 # define DITH_R 5
 358 # define DITH_G 9
 359 # define DITH_B 5
 360 # define DITH_MIX(r,g,b)  (((g) << 6) | ((b) << 3) | (r))
 361 #endif
 362 #define DITH_DX 4
 363 #define DITH_DY 4
 364 #define DITH_N  (DITH_DX * DITH_DY)
 365
 366 #define _dither(C, c, d)   (((unsigned)((DITH_N * (C - 1) + 1) * c + d)) >> 12)
 367
 368 #define MAXC    256
 369 extern const int xmesa_kernel8[DITH_DY * DITH_DX];
 370
 371 /* Dither for random X,Y */
 372 #define DITHER_SETUP                                            \
 373         int __d;                                                \
 374         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;
 375
 376 #define DITHER( X, Y, R, G, B )                         \
 377         (__d = xmesa_kernel8[(((Y)&3)<<2) | ((X)&3)],   \
 378          ctable[DITH_MIX(_dither(DITH_R, (R), __d),     \
 379                          _dither(DITH_G, (G), __d),     \
 380                          _dither(DITH_B, (B), __d))])
 381
 382 /* Dither for random X, fixed Y */
 383 #define XDITHER_SETUP(Y)                                        \
 384         int __d;                                                \
 385         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;     \
 386         const int *kernel = &xmesa_kernel8[ ((Y)&3) << 2 ];
 387
 388 #define XDITHER( X, R, G, B )                           \
 389         (__d = kernel[(X)&3],                           \
 390         ctable[DITH_MIX(_dither(DITH_R, (R), __d),      \
 391                         _dither(DITH_G, (G), __d),      \
 392                         _dither(DITH_B, (B), __d))])
 393
 394
 395
 396 /*
 397  * Dithering for flat-shaded triangles.  Precompute all 16 possible
 398  * pixel values given the triangle's RGB color.  Contributed by Martin Shenk.
 399  */
 400 #define FLAT_DITHER_SETUP( R, G, B )                                    \
 401         GLushort ditherValues[16];                                      \
 402         {                                                               \
 403            unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;  \
 404            int msdr = (DITH_N*((DITH_R)-1)+1) * (R);                    \
 405            int msdg = (DITH_N*((DITH_G)-1)+1) * (G);                    \
 406            int msdb = (DITH_N*((DITH_B)-1)+1) * (B);                    \
 407            int i;                                                       \
 408            for (i=0;i<16;i++) {                                         \
 409               int k = xmesa_kernel8[i];                                 \
 410               int j = DITH_MIX( (msdr+k)>>12, (msdg+k)>>12, (msdb+k)>>12 );\
 411               ditherValues[i] = (GLushort) ctable[j];                   \
 412            }                                                            \
 413         }
 414
 415 #define FLAT_DITHER_ROW_SETUP(Y)                                        \
 416         GLushort *ditherRow = ditherValues + ( ((Y)&3) << 2);
 417
 418 #define FLAT_DITHER(X)  ditherRow[(X)&3]
 419
 420
 421
 422 /**
 423  * If pixelformat==PF_LOOKUP:
 424  */
 425 #define _dither_lookup(C, c)   (((unsigned)((DITH_N * (C - 1) + 1) * c)) >> 12)
 426
 427 #define LOOKUP_SETUP                                            \
 428         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table
 429
 430 #define LOOKUP( R, G, B )                               \
 431         ctable[DITH_MIX(_dither_lookup(DITH_R, (R)),    \
 432                         _dither_lookup(DITH_G, (G)),    \
 433                         _dither_lookup(DITH_B, (B)))]
 434
 435
 436 /**
 437  * If pixelformat==PF_HPCR:
 438  *
 439  *      HP Color Recovery dithering               (ad@lms.be 30/08/95)
 440  *      HP has on it's 8-bit 700-series computers, a feature called
 441  *      'Color Recovery'.  This allows near 24-bit output (so they say).
 442  *      It is enabled by selecting the 8-bit  TrueColor  visual AND
 443  *      corresponding  colormap (see tkInitWindow) AND doing some special
 444  *      dither.
 445  */
 446 extern const short xmesa_HPCR_DRGB[3][2][16];
 447
 448 #define DITHER_HPCR( X, Y, R, G, B )                                       \
 449   ( ((xmesa->xm_visual->hpcr_rgbTbl[0][R] + xmesa_HPCR_DRGB[0][(Y)&1][(X)&15]) & 0xE0)     \
 450   |(((xmesa->xm_visual->hpcr_rgbTbl[1][G] + xmesa_HPCR_DRGB[1][(Y)&1][(X)&15]) & 0xE0)>>3) \
 451   | ((xmesa->xm_visual->hpcr_rgbTbl[2][B] + xmesa_HPCR_DRGB[2][(Y)&1][(X)&15])>>6)         \
 452   )
 453
 454
 455
 456 /**
 457  * If pixelformat==PF_1BIT:
 458  */
 459 extern const int xmesa_kernel1[16];
 460
 461 #define SETUP_1BIT  int bitFlip = xmesa->xm_visual->bitFlip
 462 #define DITHER_1BIT( X, Y, R, G, B )    \
 463         (( ((int)(R)+(int)(G)+(int)(B)) > xmesa_kernel1[(((Y)&3) << 2) | ((X)&3)] ) ^ bitFlip)
 464
 465
 466
 467 /**
 468  * If pixelformat==PF_GRAYSCALE:
 469  */
 470 #define GRAY_RGB( R, G, B )   XMESA_BUFFER(ctx->DrawBuffer)->color_table[((R) + (G) + (B))/3]
 471
 472
 473
 474 /**
 475  * Converts a GL window Y coord to an X window Y coord:
 476  */
 477 #define YFLIP(XRB, Y)  ((XRB)->bottom - (Y))
 478
 479
 480 /**
 481  * Return the address of a 1, 2 or 4-byte pixel in the buffer's XImage:
 482  * X==0 is left, Y==0 is bottom.
 483  */
 484 #define PIXEL_ADDR1(XRB, X, Y)  \
 485    ( (XRB)->origin1 - (Y) * (XRB)->width1 + (X) )
 486
 487 #define PIXEL_ADDR2(XRB, X, Y)  \
 488    ( (XRB)->origin2 - (Y) * (XRB)->width2 + (X) )
 489
 490 #define PIXEL_ADDR3(XRB, X, Y)  \
 491    ( (bgr_t *) ( (XRB)->origin3 - (Y) * (XRB)->width3 + 3 * (X) ))
 492
 493 #define PIXEL_ADDR4(XRB, X, Y)  \
 494    ( (XRB)->origin4 - (Y) * (XRB)->width4 + (X) )
 495
 496
 497
 498 /*
 499  * External functions:
 500  */
 501
 502 extern struct xmesa_renderbuffer *
 503 xmesa_create_renderbuffer(GLcontext *ctx, GLuint name, const GLvisual *visual,
 504                           GLboolean backBuffer);
 505
 506 extern void
 507 xmesa_delete_framebuffer(struct gl_framebuffer *fb);
 508
 509 extern XMesaBuffer
 510 xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis);
 511
 512 extern unsigned long
 513 xmesa_color_to_pixel( GLcontext *ctx,
 514                       GLubyte r, GLubyte g, GLubyte b, GLubyte a,
 515                       GLuint pixelFormat );
 516
 517 extern void
 518 xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
 519                       GLuint *width, GLuint *height);
 520
 521 extern void
 522 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer);
 523
 524 extern void
 525 xmesa_init_driver_functions( XMesaVisual xmvisual,
 526                              struct dd_function_table *driver );
 527
 528 extern void
 529 xmesa_update_state( GLcontext *ctx, GLbitfield new_state );
 530
 531 extern void
 532 xmesa_set_renderbuffer_funcs(struct xmesa_renderbuffer *xrb,
 533                              enum pixel_format pixelformat, GLint depth);
 534
 535 extern void
 536 xmesa_destroy_buffers_on_display(XMesaDisplay *dpy);
 537
 538
 539 /**
 540  * Using a function instead of an ordinary cast is safer.
 541  */
 542 static INLINE struct xmesa_renderbuffer *
 543 xmesa_renderbuffer(struct gl_renderbuffer *rb)
 544 {
 545    return (struct xmesa_renderbuffer *) rb;
 546 }
 547
 548
 549 /**
 550  * Return pointer to XMesaContext corresponding to a Mesa GLcontext.
 551  * Since we're using structure containment, it's just a cast!.
 552  */
 553 static INLINE XMesaContext
 554 XMESA_CONTEXT(GLcontext *ctx)
 555 {
 556    return (XMesaContext) ctx;
 557 }
 558
 559
 560 /**
 561  * Return pointer to XMesaBuffer corresponding to a Mesa GLframebuffer.
 562  * Since we're using structure containment, it's just a cast!.
 563  */
 564 static INLINE XMesaBuffer
 565 XMESA_BUFFER(GLframebuffer *b)
 566 {
 567    return (XMesaBuffer) b;
 568 }
 569
 570
 571 /* Plugged into the software rasterizer.  Try to use internal
 572  * swrast-style point, line and triangle functions.
 573  */
 574 extern void xmesa_choose_point( GLcontext *ctx );
 575 extern void xmesa_choose_line( GLcontext *ctx );
 576 extern void xmesa_choose_triangle( GLcontext *ctx );
 577
 578
 579 extern void xmesa_register_swrast_functions( GLcontext *ctx );
 580
 581
 582
 583 #define ENABLE_EXT_texure_compression_s3tc 0 /* SW texture compression */
 584
 585 #ifdef XFree86Server
 586 #define ENABLE_EXT_timer_query 0
 587 #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
 588 #define ENABLE_EXT_timer_query 1 /* should have 64-bit GLuint64EXT */
 589 #else
 590 #define ENABLE_EXT_timer_query 0 /* may not have 64-bit GLuint64EXT */
 591 #endif
 592
 593
 594 struct pipe_surface;
 595 struct pipe_context;
 596
 597 struct xmesa_surface
 598 {
 599    struct pipe_surface surface;
 600    struct xmesa_renderbuffer *xrb;
 601 };
 602
 603
 604 extern void
 605 xmesa_clear(struct pipe_context *pipe, struct pipe_surface *ps, GLuint value);
 606
 607 extern void
 608 xmesa_clear_buffers(GLcontext *ctx, GLbitfield buffers);
 609
 610 extern struct pipe_context *
 611 xmesa_create_softpipe(XMesaContext xm);
 612
 613 extern struct pipe_surface *
 614 xmesa_surface_alloc(struct pipe_context *pipe, GLuint format);
 615
 616 extern struct pipe_surface *
 617 xmesa_new_color_surface(struct pipe_context *pipe, GLuint format);
 618
 619 extern boolean
 620 xmesa_is_format_supported(struct pipe_context *pipe, uint format);
 621
 622 extern void
 623 xmesa_get_tile_rgba(struct pipe_context *pipe, struct pipe_surface *ps,
 624                     uint x, uint y, uint w, uint h, float *p);
 625
 626 extern void
 627 xmesa_put_tile_rgba(struct pipe_context *pipe, struct pipe_surface *ps,
 628                     uint x, uint y, uint w, uint h, const float *p);
 629
 630 #endif