src/mesa/drivers/x11/xmesaP.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.3
   4  *
   5  * Copyright (C) 1999-2005  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 #ifdef XFree86Server
  31 # include "GL/xf86glx.h"
  32 # include "xf86glx_util.h"
  33 #elif defined(USE_XSHM)
  34 # include <X11/extensions/XShm.h>
  35 #endif
  36 #include "GL/xmesa.h"
  37 #include "mtypes.h"
  38 #if defined(FX)
  39 #include "GL/fxmesa.h"
  40 #include "../glide/fxdrv.h"
  41 #endif
  42
  43
  44 extern _glthread_Mutex _xmesa_lock;
  45
  46
  47 /* for PF_8R8G8B24 pixel format */
  48 typedef struct {
  49    GLubyte b;
  50    GLubyte g;
  51    GLubyte r;
  52 } bgr_t;
  53
  54
  55 struct xmesa_renderbuffer;
  56
  57
  58 /* Function pointer for clearing color buffers */
  59 typedef void (*ClearFunc)( GLcontext *ctx, struct xmesa_renderbuffer *xrb,
  60                             GLboolean all, GLint x, GLint y,
  61                             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_8A8B8G8R,         /**< 32-bit TrueColor:  8-A, 8-B, 8-G, 8-R */
  72    PF_8R8G8B,           /**< 32-bit TrueColor:  8-R, 8-G, 8-B bits */
  73    PF_5R6G5B,           /**< 16-bit TrueColor:  5-R, 6-G, 5-B bits */
  74    PF_Dither,           /**< Color-mapped RGB with dither */
  75    PF_Lookup,           /**< Color-mapped RGB without dither */
  76    PF_HPCR,             /**< HP Color Recovery (ad@lms.be 30/08/95) */
  77    PF_1Bit,             /**< monochrome dithering of RGB */
  78    PF_Grayscale,        /**< Grayscale or StaticGray */
  79    PF_8R8G8B24,         /**< 24-bit TrueColor: 8-R, 8-G, 8-B bits */
  80    PF_Dither_5R6G5B,    /**< 16-bit dithered TrueColor: 5-R, 6-G, 5-B */
  81    PF_8A8R8G8B          /**< 32-bit TrueColor:  8-A, 8-R, 8-G, 8-B */
  82 };
  83
  84
  85 /*
  86  * "Derived" from GLvisual.  Basically corresponds to an XVisualInfo.
  87  */
  88 struct xmesa_visual {
  89    GLvisual mesa_visual;        /* Device independent visual parameters */
  90    XMesaDisplay *display;       /* The X11 display */
  91 #ifdef XFree86Server
  92    GLint ColormapEntries;
  93    GLint nplanes;
  94 #else
  95    XMesaVisualInfo visinfo;     /* X's visual info (pointer to private copy) */
  96    XVisualInfo *vishandle;      /* Only used in fakeglx.c */
  97 #endif
  98    GLint BitsPerPixel;          /* True bits per pixel for XImages */
  99
 100    GLboolean ximage_flag;       /* Use XImage for back buffer (not pixmap)? */
 101
 102    enum pixel_format dithered_pf;  /* Pixel format when dithering */
 103    enum pixel_format undithered_pf;/* Pixel format when not dithering */
 104
 105    GLfloat RedGamma;            /* Gamma values, 1.0 is default */
 106    GLfloat GreenGamma;
 107    GLfloat BlueGamma;
 108
 109    /* For PF_TRUECOLOR */
 110    GLint rshift, gshift, bshift;/* Pixel color component shifts */
 111    GLubyte Kernel[16];          /* Dither kernel */
 112    unsigned long RtoPixel[512]; /* RGB to pixel conversion */
 113    unsigned long GtoPixel[512];
 114    unsigned long BtoPixel[512];
 115    GLubyte PixelToR[256];       /* Pixel to RGB conversion */
 116    GLubyte PixelToG[256];
 117    GLubyte PixelToB[256];
 118
 119    /* For PF_HPCR */
 120    short       hpcr_rgbTbl[3][256];
 121    GLboolean   hpcr_clear_flag;
 122    GLubyte     hpcr_clear_ximage_pattern[2][16];
 123    XMesaImage *hpcr_clear_ximage;
 124    XMesaPixmap hpcr_clear_pixmap;
 125
 126    /* For PF_1BIT */
 127    int bitFlip;
 128 };
 129
 130
 131 /*
 132  * "Derived" from __GLcontextRec.  Basically corresponds to a GLXContext.
 133  */
 134 struct xmesa_context {
 135    GLcontext mesa;              /* the core library context (containment) */
 136    XMesaVisual xm_visual;       /* Describes the buffers */
 137    XMesaBuffer xm_buffer;       /* current span/point/line/triangle buffer */
 138
 139    XMesaDisplay *display;       /* == xm_visual->display */
 140    GLboolean swapbytes;         /* Host byte order != display byte order? */
 141    GLboolean direct;            /* Direct rendering context? */
 142
 143    enum pixel_format pixelformat;
 144
 145    GLubyte clearcolor[4];               /* current clearing color */
 146    unsigned long clearpixel;            /* current clearing pixel value */
 147 };
 148
 149
 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 struct xmesa_renderbuffer
 160 {
 161    struct gl_renderbuffer Base;  /* Base class */
 162
 163    XMesaDrawable pixmap;        /* Either an X Window ID (front color buf) */
 164                                 /* or X Pixmap ID (back color buf) */
 165
 166    XMesaImage *ximage;  /* The back buffer, if not using a Pixmap */
 167
 168    GLubyte *origin1;    /* used for PIXEL_ADDR1 macro */
 169    GLint width1;
 170    GLushort *origin2;   /* used for PIXEL_ADDR2 macro */
 171    GLint width2;
 172    GLubyte *origin3;    /* used for PIXEL_ADDR3 macro */
 173    GLint width3;
 174    GLuint *origin4;     /* used for PIXEL_ADDR4 macro */
 175    GLint width4;
 176
 177    GLint bottom;        /* used for FLIP macro */
 178
 179    ClearFunc clearFunc;
 180 };
 181
 182
 183 /*
 184  * "Derived" from GLframebuffer.  Basically corresponds to a GLXDrawable.
 185  */
 186 struct xmesa_buffer {
 187    GLframebuffer mesa_buffer;   /* depth, stencil, accum, etc buffers */
 188                                 /* This MUST BE FIRST! */
 189    GLboolean wasCurrent;        /* was ever the current buffer? */
 190    XMesaVisual xm_visual;       /* the X/Mesa visual */
 191
 192    XMesaDisplay *display;
 193    BufferType type;             /* window, pixmap, pbuffer or glxwindow */
 194
 195    struct xmesa_renderbuffer *frontxrb; /* front color renderbuffer */
 196    struct xmesa_renderbuffer *backxrb;  /* back color renderbuffer */
 197
 198    XMesaColormap cmap;          /* the X colormap */
 199
 200    unsigned long selectedEvents;/* for pbuffers only */
 201
 202    GLint db_state;              /* 0 = single buffered */
 203                                 /* BACK_PIXMAP = use Pixmap for back buffer */
 204                                 /* BACK_XIMAGE = use XImage for back buffer */
 205
 206 #ifndef XFree86Server
 207    GLuint shm;                  /* X Shared Memory extension status:    */
 208                                 /*    0 = not available                 */
 209                                 /*    1 = XImage support available      */
 210                                 /*    2 = Pixmap support available too  */
 211 #ifdef USE_XSHM
 212    XShmSegmentInfo shminfo;
 213 #endif
 214 #endif
 215
 216    XMesaImage *rowimage;        /* Used for optimized span writing */
 217    XMesaPixmap stipple_pixmap;  /* For polygon stippling */
 218    XMesaGC stipple_gc;          /* For polygon stippling */
 219
 220    XMesaGC gc;                  /* scratch GC for span, line, tri drawing */
 221    XMesaGC cleargc;             /* GC for clearing the color buffer */
 222    XMesaGC swapgc;              /* GC for swapping the color buffers */
 223
 224    /* The following are here instead of in the XMesaVisual
 225     * because they depend on the window's colormap.
 226     */
 227
 228    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 229    unsigned long color_table[576];      /* RGB -> pixel value */
 230
 231    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 232    GLubyte pixel_to_r[65536];           /* pixel value -> red */
 233    GLubyte pixel_to_g[65536];           /* pixel value -> green */
 234    GLubyte pixel_to_b[65536];           /* pixel value -> blue */
 235
 236    /* Used to do XAllocColor/XFreeColors accounting: */
 237    int num_alloced;
 238 #if defined(XFree86Server)
 239    Pixel alloced_colors[256];
 240 #else
 241    unsigned long alloced_colors[256];
 242 #endif
 243
 244 #if defined( FX )
 245    /* For 3Dfx Glide only */
 246    GLboolean FXisHackUsable;    /* Can we render into window? */
 247    GLboolean FXwindowHack;      /* Are we rendering into a window? */
 248    fxMesaContext FXctx;
 249 #endif
 250
 251    struct xmesa_buffer *Next;   /* Linked list pointer: */
 252 };
 253
 254
 255 /* Values for xmesa->db_state: */
 256 #define FRONT_PIXMAP    1
 257 #define BACK_PIXMAP     2
 258 #define BACK_XIMAGE     4
 259
 260
 261 /*
 262  * If pixelformat==PF_TRUECOLOR:
 263  */
 264 #define PACK_TRUECOLOR( PIXEL, R, G, B )        \
 265    PIXEL = xmesa->xm_visual->RtoPixel[R]        \
 266          | xmesa->xm_visual->GtoPixel[G]        \
 267          | xmesa->xm_visual->BtoPixel[B];       \
 268
 269
 270 /*
 271  * If pixelformat==PF_TRUEDITHER:
 272  */
 273 #define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B )                 \
 274 {                                                               \
 275    int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)];    \
 276    PIXEL = xmesa->xm_visual->RtoPixel[(R)+d]                    \
 277          | xmesa->xm_visual->GtoPixel[(G)+d]                    \
 278          | xmesa->xm_visual->BtoPixel[(B)+d];                   \
 279 }
 280
 281
 282
 283 /*
 284  * If pixelformat==PF_8A8B8G8R:
 285  */
 286 #define PACK_8A8B8G8R( R, G, B, A )     \
 287         ( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
 288
 289
 290 /*
 291  * Like PACK_8A8B8G8R() but don't use alpha.  This is usually an acceptable
 292  * shortcut.
 293  */
 294 #define PACK_8B8G8R( R, G, B )   ( ((B) << 16) | ((G) << 8) | (R) )
 295
 296
 297
 298 /*
 299  * If pixelformat==PF_8R8G8B:
 300  */
 301 #define PACK_8R8G8B( R, G, B)    ( ((R) << 16) | ((G) << 8) | (B) )
 302
 303
 304 /*
 305  * If pixelformat==PF_5R6G5B:
 306  */
 307 #define PACK_5R6G5B( R, G, B)    ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
 308
 309
 310 /*
 311  * If pixelformat==PF_8A8R8G8B:
 312  */
 313 #define PACK_8A8R8G8B( R, G, B, A )     \
 314         ( ((A) << 24) | ((R) << 16) | ((G) << 8) | (B) )
 315
 316
 317
 318 /*
 319  * If pixelformat==PF_DITHER:
 320  *
 321  * Improved 8-bit RGB dithering code contributed by Bob Mercier
 322  * (mercier@hollywood.cinenet.net).  Thanks Bob!
 323  */
 324 #ifdef DITHER666
 325 # define DITH_R   6
 326 # define DITH_G   6
 327 # define DITH_B   6
 328 # define DITH_MIX(r,g,b)  (((r) * DITH_G + (g)) * DITH_B + (b))
 329 #else
 330 # define DITH_R 5
 331 # define DITH_G 9
 332 # define DITH_B 5
 333 # define DITH_MIX(r,g,b)  (((g) << 6) | ((b) << 3) | (r))
 334 #endif
 335 #define DITH_DX 4
 336 #define DITH_DY 4
 337 #define DITH_N  (DITH_DX * DITH_DY)
 338
 339 #define _dither(C, c, d)   (((unsigned)((DITH_N * (C - 1) + 1) * c + d)) >> 12)
 340
 341 #define MAXC    256
 342 extern const int xmesa_kernel8[DITH_DY * DITH_DX];
 343
 344 /* Dither for random X,Y */
 345 #define DITHER_SETUP                                            \
 346         int __d;                                                \
 347         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;
 348
 349 #define DITHER( X, Y, R, G, B )                         \
 350         (__d = xmesa_kernel8[(((Y)&3)<<2) | ((X)&3)],   \
 351          ctable[DITH_MIX(_dither(DITH_R, (R), __d),     \
 352                          _dither(DITH_G, (G), __d),     \
 353                          _dither(DITH_B, (B), __d))])
 354
 355 /* Dither for random X, fixed Y */
 356 #define XDITHER_SETUP(Y)                                        \
 357         int __d;                                                \
 358         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;     \
 359         const int *kernel = &xmesa_kernel8[ ((Y)&3) << 2 ];
 360
 361 #define XDITHER( X, R, G, B )                           \
 362         (__d = kernel[(X)&3],                           \
 363         ctable[DITH_MIX(_dither(DITH_R, (R), __d),      \
 364                         _dither(DITH_G, (G), __d),      \
 365                         _dither(DITH_B, (B), __d))])
 366
 367
 368
 369 /*
 370  * Dithering for flat-shaded triangles.  Precompute all 16 possible
 371  * pixel values given the triangle's RGB color.  Contributed by Martin Shenk.
 372  */
 373 #define FLAT_DITHER_SETUP( R, G, B )                                    \
 374         GLushort ditherValues[16];                                      \
 375         {                                                               \
 376            unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table;  \
 377            int msdr = (DITH_N*((DITH_R)-1)+1) * (R);                    \
 378            int msdg = (DITH_N*((DITH_G)-1)+1) * (G);                    \
 379            int msdb = (DITH_N*((DITH_B)-1)+1) * (B);                    \
 380            int i;                                                       \
 381            for (i=0;i<16;i++) {                                         \
 382               int k = xmesa_kernel8[i];                                 \
 383               int j = DITH_MIX( (msdr+k)>>12, (msdg+k)>>12, (msdb+k)>>12 );\
 384               ditherValues[i] = (GLushort) ctable[j];                   \
 385            }                                                            \
 386         }
 387
 388 #define FLAT_DITHER_ROW_SETUP(Y)                                        \
 389         GLushort *ditherRow = ditherValues + ( ((Y)&3) << 2);
 390
 391 #define FLAT_DITHER(X)  ditherRow[(X)&3]
 392
 393
 394
 395 /*
 396  * If pixelformat==PF_LOOKUP:
 397  */
 398 #define _dither_lookup(C, c)   (((unsigned)((DITH_N * (C - 1) + 1) * c)) >> 12)
 399
 400 #define LOOKUP_SETUP                                            \
 401         unsigned long *ctable = XMESA_BUFFER(ctx->DrawBuffer)->color_table
 402
 403 #define LOOKUP( R, G, B )                               \
 404         ctable[DITH_MIX(_dither_lookup(DITH_R, (R)),    \
 405                         _dither_lookup(DITH_G, (G)),    \
 406                         _dither_lookup(DITH_B, (B)))]
 407
 408
 409
 410 /*
 411  * If pixelformat==PF_HPCR:
 412  *
 413  *      HP Color Recovery dithering               (ad@lms.be 30/08/95)
 414  *      HP has on it's 8-bit 700-series computers, a feature called
 415  *      'Color Recovery'.  This allows near 24-bit output (so they say).
 416  *      It is enabled by selecting the 8-bit  TrueColor  visual AND
 417  *      corresponding  colormap (see tkInitWindow) AND doing some special
 418  *      dither.
 419  */
 420 extern const short xmesa_HPCR_DRGB[3][2][16];
 421
 422 #define DITHER_HPCR( X, Y, R, G, B )                                       \
 423   ( ((xmesa->xm_visual->hpcr_rgbTbl[0][R] + xmesa_HPCR_DRGB[0][(Y)&1][(X)&15]) & 0xE0)     \
 424   |(((xmesa->xm_visual->hpcr_rgbTbl[1][G] + xmesa_HPCR_DRGB[1][(Y)&1][(X)&15]) & 0xE0)>>3) \
 425   | ((xmesa->xm_visual->hpcr_rgbTbl[2][B] + xmesa_HPCR_DRGB[2][(Y)&1][(X)&15])>>6)         \
 426   )
 427
 428
 429
 430 /*
 431  * If pixelformat==PF_1BIT:
 432  */
 433 extern const int xmesa_kernel1[16];
 434
 435 #define SETUP_1BIT  int bitFlip = xmesa->xm_visual->bitFlip
 436 #define DITHER_1BIT( X, Y, R, G, B )    \
 437         (( ((int)(R)+(int)(G)+(int)(B)) > xmesa_kernel1[(((Y)&3) << 2) | ((X)&3)] ) ^ bitFlip)
 438
 439
 440
 441 /*
 442  * If pixelformat==PF_GRAYSCALE:
 443  */
 444 #define GRAY_RGB( R, G, B )   XMESA_BUFFER(ctx->DrawBuffer)->color_table[((R) + (G) + (B))/3]
 445
 446
 447
 448 /*
 449  * Converts a GL window Y coord to an X window Y coord:
 450  */
 451 #define YFLIP(XRB, Y)  ((XRB)->bottom - (Y))
 452
 453
 454 /*
 455  * Return the address of a 1, 2 or 4-byte pixel in the buffer's XImage:
 456  * X==0 is left, Y==0 is bottom.
 457  */
 458 #define PIXEL_ADDR1(XRB, X, Y)  \
 459    ( (XRB)->origin1 - (Y) * (XRB)->width1 + (X) )
 460
 461 #define PIXEL_ADDR2(XRB, X, Y)  \
 462    ( (XRB)->origin2 - (Y) * (XRB)->width2 + (X) )
 463
 464 #define PIXEL_ADDR3(XRB, X, Y)  \
 465    ( (bgr_t *) ( (XRB)->origin3 - (Y) * (XRB)->width3 + 3 * (X) ))
 466
 467 #define PIXEL_ADDR4(XRB, X, Y)  \
 468    ( (XRB)->origin4 - (Y) * (XRB)->width4 + (X) )
 469
 470
 471
 472
 473 /*
 474  * Return pointer to XMesaContext corresponding to a Mesa GLcontext.
 475  * Since we're using structure containment, it's just a cast!.
 476  */
 477 #define XMESA_CONTEXT(MESACTX)  ((XMesaContext) (MESACTX))
 478
 479 /*
 480  * Return pointer to XMesaBuffer corresponding to a Mesa GLframebuffer.
 481  * Since we're using structure containment, it's just a cast!.
 482  */
 483 #define XMESA_BUFFER(MESABUFF)  ((XMesaBuffer) (MESABUFF))
 484
 485
 486
 487 /*
 488  * External functions:
 489  */
 490
 491 extern struct xmesa_renderbuffer *
 492 xmesa_new_renderbuffer(GLcontext *ctx, GLuint name, GLboolean rgbMode);
 493
 494 extern unsigned long
 495 xmesa_color_to_pixel( GLcontext *ctx,
 496                       GLubyte r, GLubyte g, GLubyte b, GLubyte a,
 497                       GLuint pixelFormat );
 498
 499 extern void
 500 xmesa_alloc_back_buffer(XMesaBuffer b, GLuint width, GLuint height);
 501
 502 extern void xmesa_resize_buffers(GLcontext *ctx, GLframebuffer *buffer,
 503                                  GLuint width, GLuint height);
 504
 505 extern void xmesa_init_driver_functions( XMesaVisual xmvisual,
 506                                          struct dd_function_table *driver );
 507
 508 extern void xmesa_update_state( GLcontext *ctx, GLuint new_state );
 509
 510 extern void
 511 xmesa_set_renderbuffer_funcs(struct xmesa_renderbuffer *xrb,
 512                              enum pixel_format pixelformat, GLint depth);
 513
 514
 515 extern void xmesa_set_buffer( GLcontext *ctx, GLframebuffer *buffer,
 516                               GLuint bufferBit );
 517
 518
 519 /* Plugged into the software rasterizer.  Try to use internal
 520  * swrast-style point, line and triangle functions.
 521  */
 522 extern void xmesa_choose_point( GLcontext *ctx );
 523 extern void xmesa_choose_line( GLcontext *ctx );
 524 extern void xmesa_choose_triangle( GLcontext *ctx );
 525
 526
 527 extern void xmesa_register_swrast_functions( GLcontext *ctx );
 528
 529
 530
 531 /* XXX this is a hack to implement shared display lists with 3Dfx */
 532 extern XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v,
 533                                              XMesaWindow w,
 534                                              XMesaContext c );
 535
 536 /*
 537  * These are the extra routines required for integration with XFree86.
 538  * None of these routines should be user visible. -KEM
 539  */
 540 extern void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v );
 541 extern GLboolean XMesaForceCurrent(XMesaContext c);
 542 extern GLboolean XMesaLoseCurrent(XMesaContext c);
 543 extern void XMesaReset( void );
 544
 545
 546 #define SWTC 0 /* SW texture compression */
 547
 548
 549 #endif