src/mesa/drivers/x11/xmesaP.h

   1 /* $Id: xmesaP.h,v 1.3 1999/11/24 18:49:44 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.3
   6  *
   7  * Copyright (C) 1999  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 #ifndef XMESAP_H
  29 #define XMESAP_H
  30
  31
  32 #ifdef XFree86Server
  33 # include "GL/xf86glx.h"
  34 # include "xf86glx_util.h"
  35 #else
  36 # ifdef GLX_DIRECT_RENDERING
  37 #  include "dri_mesa.h"
  38 # endif
  39 # ifdef USE_XSHM
  40 #  include <X11/extensions/XShm.h>
  41 # endif
  42 #endif
  43 #include "GL/xmesa.h"
  44 #include "types.h"
  45 #if defined(FX) && !defined(GLX_DIRECT_RENDERING)
  46 #include "GL/fxmesa.h"
  47 #include "../FX/fxdrv.h"
  48 #endif
  49
  50
  51 #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
  52 #  include "xdriP.h"
  53 #else
  54 #  define DRI_DRAWABLE_ARG
  55 #  define DRI_DRAWABLE_PARM
  56 #  define DRI_CTX_ARG
  57 #endif
  58
  59
  60 /* for PF_8R8G8B24 pixel format */
  61 typedef struct {
  62    GLubyte b;
  63    GLubyte g;
  64    GLubyte r;
  65 } bgr_t;
  66
  67
  68
  69
  70 /*
  71  * "Derived" from gl_visual.  Basically corresponds to an XVisualInfo.
  72  */
  73 struct xmesa_visual {
  74    GLvisual *gl_visual;         /* Device independent visual parameters */
  75    XMesaDisplay *display;       /* The X11 display */
  76 #ifdef XFree86Server
  77    GLint screen_depth;  /* The depth of the screen */
  78 #else
  79    XVisualInfo *vishandle;      /* The pointer returned by glXChooseVisual */
  80 #endif
  81    XMesaVisualInfo visinfo;     /* X's visual info */
  82
  83    GLint level;                 /* 0=normal, 1=overlay, etc */
  84
  85    GLboolean ximage_flag;       /* Use XImage for back buffer (not pixmap)? */
  86
  87    GLuint dithered_pf;          /* Pixel format when dithering */
  88    GLuint undithered_pf;        /* Pixel format when not dithering */
  89
  90    GLfloat RedGamma;            /* Gamma values, 1.0 is default */
  91    GLfloat GreenGamma;
  92    GLfloat BlueGamma;
  93
  94    GLint rmult, gmult, bmult;   /* Range of color values */
  95    GLint index_bits;            /* Bits per pixel in CI mode */
  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 /*
 121  * "Derived" from gl_context.  Basically corresponds to a GLXContext.
 122  */
 123 struct xmesa_context {
 124    GLcontext *gl_ctx;           /* the core library context */
 125    XMesaVisual xm_visual;       /* Describes the buffers */
 126    XMesaBuffer xm_buffer;       /* current framebuffer */
 127    XMesaBuffer xm_read_buffer;  /* current framebuffer */
 128
 129    XMesaDisplay *display;       /* == xm_visual->display */
 130    GLboolean swapbytes;         /* Host byte order != display byte order? */
 131    GLboolean direct;            /* Direct rendering context? */
 132
 133    GLuint pixelformat;          /* Current pixel format */
 134
 135    GLubyte red, green, blue, alpha;     /* current drawing color */
 136    unsigned long pixel;                 /* current drawing pixel value */
 137
 138    GLubyte clearcolor[4];               /* current clearing color */
 139    unsigned long clearpixel;            /* current clearing pixel value */
 140
 141 #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
 142   __DRIcontextPrivate *driContextPriv; /* back pointer to DRI context
 143                                         * used for locking
 144                                         */
 145   void *private;                        /* device-specific private context */
 146 #endif
 147 };
 148
 149
 150
 151 /*
 152  * "Derived" from gl_buffer.  Basically corresponds to a GLXDrawable.
 153  */
 154 struct xmesa_buffer {
 155    GLboolean wasCurrent;        /* was ever the current buffer? */
 156    GLframebuffer *gl_buffer;    /* depth, stencil, accum, etc buffers */
 157    XMesaVisual xm_visual;       /* the X/Mesa visual */
 158
 159    XMesaContext xm_context;     /* the context associated with this buffer */
 160    XMesaDisplay *display;
 161    GLboolean pixmap_flag;       /* is the buffer a Pixmap? */
 162    XMesaDrawable frontbuffer;   /* either a window or pixmap */
 163    XMesaPixmap backpixmap;      /* back buffer Pixmap */
 164    XMesaImage *backimage;       /* back buffer simulated XImage */
 165
 166    XMesaDrawable buffer;        /* the current buffer, either equal to */
 167                                 /* frontbuffer, backpixmap or XIMAGE (None) */
 168
 169    XMesaColormap cmap;          /* the X colormap */
 170
 171    GLint db_state;              /* 0 = single buffered */
 172                                 /* BACK_PIXMAP = use Pixmap for back buffer */
 173                                 /* BACK_XIMAGE = use XImage for back buffer */
 174
 175 #ifndef XFree86Server
 176    GLuint shm;                  /* X Shared Memory extension status:    */
 177                                 /*    0 = not available                 */
 178                                 /*    1 = XImage support available      */
 179                                 /*    2 = Pixmap support available too  */
 180 #ifdef USE_XSHM
 181    XShmSegmentInfo shminfo;
 182 #endif
 183 #endif
 184
 185    XMesaImage *rowimage;        /* Used for optimized span writing */
 186
 187    GLuint width, height;        /* size of buffer */
 188
 189    GLint bottom;                /* used for FLIP macro below */
 190    GLubyte *ximage_origin1;     /* used for PIXELADDR1 macro */
 191    GLint ximage_width1;
 192    GLushort *ximage_origin2;    /* used for PIXELADDR2 macro */
 193    GLint ximage_width2;
 194    bgr_t *ximage_origin3;       /* used for PIXELADDR3 macro */
 195    GLint ximage_width3;
 196    GLuint *ximage_origin4;      /* used for PIXELADDR4 macro */
 197    GLint ximage_width4;
 198
 199    XMesaPixmap stipple_pixmap;  /* For polygon stippling */
 200    XMesaGC stipple_gc;          /* For polygon stippling */
 201
 202    XMesaGC gc1;                 /* GC for infrequent color changes */
 203    XMesaGC gc2;                 /* GC for frequent color changes */
 204    XMesaGC cleargc;             /* GC for clearing the color buffer */
 205
 206    /* The following are here instead of in the XMesaVisual
 207     * because they depend on the window's colormap.
 208     */
 209
 210    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 211    unsigned long color_table[576];      /* RGB -> pixel value */
 212
 213    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 214    GLubyte pixel_to_r[65536];           /* pixel value -> red */
 215    GLubyte pixel_to_g[65536];           /* pixel value -> green */
 216    GLubyte pixel_to_b[65536];           /* pixel value -> blue */
 217
 218    /* Used to do XAllocColor/XFreeColors accounting: */
 219    int num_alloced;
 220    unsigned long alloced_colors[256];
 221
 222 #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
 223   __DRIdrawablePrivate *driDrawPriv;    /* back pointer to DRI drawable
 224                                          * used for direct access to framebuffer
 225                                          */
 226   void *private;                        /* device-specific private drawable */
 227 #endif
 228
 229 #if defined( FX ) && !defined(GLX_DIRECT_RENDERING)
 230    /* For 3Dfx Glide only */
 231    GLboolean FXisHackUsable;    /* Can we render into window? */
 232    GLboolean FXwindowHack;      /* Are we rendering into a window? */
 233    fxMesaContext FXctx;
 234 #endif
 235
 236    struct xmesa_buffer *Next;   /* Linked list pointer: */
 237 };
 238
 239
 240
 241 /* Values for xmesa->dest: */
 242 #define FRONT_PIXMAP    1
 243 #define BACK_PIXMAP     2
 244 #define BACK_XIMAGE     4
 245
 246
 247 /* Values for xmesa->pixelformat: */
 248 #define PF_INDEX          1     /* Color Index mode */
 249 #define PF_TRUECOLOR      2     /* TrueColor or DirectColor, any depth */
 250 #define PF_TRUEDITHER     3     /* TrueColor with dithering */
 251 #define PF_8A8B8G8R       4     /* 32-bit TrueColor:  8-A, 8-B, 8-G, 8-R */
 252 #define PF_8R8G8B         5     /* 32-bit TrueColor:  8-R, 8-G, 8-B bits */
 253 #define PF_5R6G5B         6     /* 16-bit TrueColor:  5-R, 6-G, 5-B bits */
 254 #define PF_DITHER         7     /* Color-mapped RGB with dither */
 255 #define PF_LOOKUP         8     /* Color-mapped RGB without dither */
 256 #define PF_HPCR           9     /* HP Color Recovery (ad@lms.be 30/08/95) */
 257 #define PF_1BIT          10     /* monochrome dithering of RGB */
 258 #define PF_GRAYSCALE     11     /* Grayscale or StaticGray */
 259 #define PF_8R8G8B24      12     /* 24-bit TrueColor: 8-R, 8-G, 8-B bits */
 260 #define PF_DITHER_5R6G5B 13     /* 16-bit dithered TrueColor: 5-R, 6-G, 5-B */
 261
 262
 263 /*
 264  * If pixelformat==PF_TRUECOLOR:
 265  */
 266 #define PACK_TRUECOLOR( PIXEL, R, G, B )        \
 267    PIXEL = xmesa->xm_visual->RtoPixel[R]        \
 268          | xmesa->xm_visual->GtoPixel[G]        \
 269          | xmesa->xm_visual->BtoPixel[B];       \
 270
 271
 272 /*
 273  * If pixelformat==PF_TRUEDITHER:
 274  */
 275 #define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B )                 \
 276 {                                                               \
 277    int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)];    \
 278    PIXEL = xmesa->xm_visual->RtoPixel[(R)+d]                    \
 279          | xmesa->xm_visual->GtoPixel[(G)+d]                    \
 280          | xmesa->xm_visual->BtoPixel[(B)+d];                   \
 281 }
 282
 283
 284
 285 /*
 286  * If pixelformat==PF_8A8B8G8R:
 287  */
 288 #define PACK_8A8B8G8R( R, G, B, A )     \
 289         ( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
 290
 291
 292 /*
 293  * Like PACK_8A8B8G8R() but don't use alpha.  This is usually an acceptable
 294  * shortcut.
 295  */
 296 #define PACK_8B8G8R( R, G, B )   ( ((B) << 16) | ((G) << 8) | (R) )
 297
 298
 299
 300 /*
 301  * If pixelformat==PF_8R8G8B:
 302  */
 303 #define PACK_8R8G8B( R, G, B)    ( ((R) << 16) | ((G) << 8) | (B) )
 304
 305
 306 /*
 307  * If pixelformat==PF_5R6G5B:
 308  */
 309 #define PACK_5R6G5B( R, G, B)    ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
 310
 311
 312
 313
 314 /*
 315  * If pixelformat==PF_DITHER:
 316  *
 317  * Improved 8-bit RGB dithering code contributed by Bob Mercier
 318  * (mercier@hollywood.cinenet.net).  Thanks Bob!
 319  */
 320 #undef _R
 321 #undef _G
 322 #undef _B
 323 #undef _D
 324 #ifdef DITHER666
 325 # define _R   6
 326 # define _G   6
 327 # define _B   6
 328 # define _MIX(r,g,b)  (((r)*_G+(g))*_B+(b))
 329 #else
 330 # define _R     5
 331 # define _G     9
 332 # define _B     5
 333 # define _MIX(r,g,b)    ( ((g)<<6) | ((b)<<3) | (r) )
 334 #endif
 335 #define _DX     4
 336 #define _DY     4
 337 #define _D      (_DX*_DY)
 338
 339 /*#define _DITH(C,c,d)  (((unsigned)((_D*(C-1)+1)*c+d))/(_D*256))*/
 340 #define _DITH(C,c,d)    (((unsigned)((_D*(C-1)+1)*c+d)) >> 12)
 341
 342 #define MAXC    256
 343 static int kernel8[_DY*_DX] = {
 344     0 * MAXC,  8 * MAXC,  2 * MAXC, 10 * MAXC,
 345    12 * MAXC,  4 * MAXC, 14 * MAXC,  6 * MAXC,
 346     3 * MAXC, 11 * MAXC,  1 * MAXC,  9 * MAXC,
 347    15 * MAXC,  7 * MAXC, 13 * MAXC,  5 * MAXC,
 348 };
 349 /*static int __d;*/
 350
 351 /* Dither for random X,Y */
 352 #define DITHER_SETUP                                            \
 353         int __d;                                                \
 354         unsigned long *ctable = xmesa->xm_buffer->color_table;
 355
 356 #define DITHER( X, Y, R, G, B )                         \
 357         (__d = kernel8[(((Y)&3)<<2) | ((X)&3)],         \
 358          ctable[_MIX(_DITH(_R, (R), __d),               \
 359                      _DITH(_G, (G), __d),               \
 360                      _DITH(_B, (B), __d))])
 361
 362 /* Dither for random X, fixed Y */
 363 #define XDITHER_SETUP(Y)                                        \
 364         int __d;                                                \
 365         unsigned long *ctable = xmesa->xm_buffer->color_table;  \
 366         int *kernel = &kernel8[ ((Y)&3) << 2 ];
 367
 368 #define XDITHER( X, R, G, B )                           \
 369         (__d = kernel[(X)&3],                           \
 370         ctable[_MIX(_DITH(_R, (R), __d),                \
 371                     _DITH(_G, (G), __d),                \
 372                     _DITH(_B, (B), __d))])
 373
 374
 375
 376 /*
 377  * Dithering for flat-shaded triangles.  Precompute all 16 possible
 378  * pixel values given the triangle's RGB color.  Contributed by Martin Shenk.
 379  */
 380 static GLushort DitherValues[16];   /* array of (up to) 16-bit pixel values */
 381
 382 #define FLAT_DITHER_SETUP( R, G, B )                                    \
 383         {                                                               \
 384            unsigned long *ctable = xmesa->xm_buffer->color_table;       \
 385            int msdr = (_D*((_R)-1)+1) * (R);                            \
 386            int msdg = (_D*((_G)-1)+1) * (G);                            \
 387            int msdb = (_D*((_B)-1)+1) * (B);                            \
 388            int i;                                                       \
 389            for (i=0;i<16;i++) {                                         \
 390               int k = kernel8[i];                                       \
 391               int j = _MIX( (msdr+k)>>12, (msdg+k)>>12, (msdb+k)>>12 ); \
 392               DitherValues[i] = (GLushort) ctable[j];                   \
 393            }                                                            \
 394         }
 395
 396 #define FLAT_DITHER_ROW_SETUP(Y)                                        \
 397         GLushort *ditherRow = DitherValues + ( ((Y)&3) << 2);
 398
 399 #define FLAT_DITHER(X)  ditherRow[(X)&3]
 400
 401
 402
 403 /*
 404  * If pixelformat==PF_LOOKUP:
 405  */
 406 #define _DITH0(C,c)     (((unsigned)((_D*(C-1)+1)*c)) >> 12)
 407
 408 #define LOOKUP_SETUP                                            \
 409         unsigned long *ctable = xmesa->xm_buffer->color_table
 410
 411 #define LOOKUP( R, G, B )                       \
 412         ctable[_MIX(_DITH0(_R, (R)),            \
 413                     _DITH0(_G, (G)),            \
 414                     _DITH0(_B, (B)))]
 415
 416
 417
 418 /*
 419  * If pixelformat==PF_HPCR:
 420  *
 421  *      HP Color Recovery dithering               (ad@lms.be 30/08/95)
 422  *      HP has on it's 8-bit 700-series computers, a feature called
 423  *      'Color Recovery'.  This allows near 24-bit output (so they say).
 424  *      It is enabled by selecting the 8-bit  TrueColor  visual AND
 425  *      corresponding  colormap (see tkInitWindow) AND doing some special
 426  *      dither.
 427  */
 428 static const short HPCR_DRGB[3][2][16] = {
 429 {
 430     { 16, -4,  1,-11, 14, -6,  3, -9, 15, -5,  2,-10, 13, -7,  4, -8},
 431     {-15,  5,  0, 12,-13,  7, -2, 10,-14,  6, -1, 11,-12,  8, -3,  9}
 432 },
 433 {
 434     {-11, 15, -7,  3, -8, 14, -4,  2,-10, 16, -6,  4, -9, 13, -5,  1},
 435     { 12,-14,  8, -2,  9,-13,  5, -1, 11,-15,  7, -3, 10,-12,  6,  0}
 436 },
 437 {
 438     {  6,-18, 26,-14,  2,-22, 30,-10,  8,-16, 28,-12,  4,-20, 32, -8},
 439     { -4, 20,-24, 16,  0, 24,-28, 12, -6, 18,-26, 14, -2, 22,-30, 10}
 440 }
 441 };
 442
 443 #define DITHER_HPCR( X, Y, R, G, B )                                       \
 444   ( ((xmesa->xm_visual->hpcr_rgbTbl[0][R] + HPCR_DRGB[0][(Y)&1][(X)&15]) & 0xE0)     \
 445   |(((xmesa->xm_visual->hpcr_rgbTbl[1][G] + HPCR_DRGB[1][(Y)&1][(X)&15]) & 0xE0)>>3) \
 446   | ((xmesa->xm_visual->hpcr_rgbTbl[2][B] + HPCR_DRGB[2][(Y)&1][(X)&15])>>6)       \
 447   )
 448
 449
 450
 451 /*
 452  * If pixelformat==PF_1BIT:
 453  */
 454 static int const kernel1[16] = {
 455    0*47,  9*47,  4*47, 12*47,     /* 47 = (255*3)/16 */
 456    6*47,  2*47, 14*47,  8*47,
 457   10*47,  1*47,  5*47, 11*47,
 458    7*47, 13*47,  3*47, 15*47 };
 459
 460 #define SETUP_1BIT  int bitFlip = xmesa->xm_visual->bitFlip
 461 #define DITHER_1BIT( X, Y, R, G, B )    \
 462         (( ((int)(R)+(int)(G)+(int)(B)) > kernel1[(((Y)&3) << 2) | ((X)&3)] ) ^ bitFlip)
 463
 464
 465
 466 /*
 467  * If pixelformat==PF_GRAYSCALE:
 468  */
 469 #define GRAY_RGB( R, G, B )   xmesa->xm_buffer->color_table[((R) + (G) + (B))/3]
 470
 471
 472
 473 #define XIMAGE None
 474
 475
 476 /*
 477  * Converts a GL window Y coord to an X window Y coord:
 478  */
 479 #define FLIP(Y)  (xmesa->xm_buffer->bottom-(Y))
 480
 481
 482 /*
 483  * Return the address of a 1, 2 or 4-byte pixel in the back XImage:
 484  * X==0 is left, Y==0 is bottom.
 485  */
 486 #define PIXELADDR1( X, Y )  \
 487       ( xmesa->xm_buffer->ximage_origin1 - (Y) * xmesa->xm_buffer->ximage_width1 + (X) )
 488
 489 #define PIXELADDR2( X, Y )  \
 490       ( xmesa->xm_buffer->ximage_origin2 - (Y) * xmesa->xm_buffer->ximage_width2 + (X) )
 491
 492 #define PIXELADDR3( X, Y )  \
 493       ( xmesa->xm_buffer->ximage_origin3 - (Y) * xmesa->xm_buffer->ximage_width3 + (X) )
 494
 495 #define PIXELADDR4( X, Y )  \
 496       ( xmesa->xm_buffer->ximage_origin4 - (Y) * xmesa->xm_buffer->ximage_width4 + (X) )
 497
 498
 499
 500 /*
 501  * External functions:
 502  */
 503
 504 extern unsigned long xmesa_color_to_pixel( XMesaContext xmesa,
 505                                   GLubyte r, GLubyte g, GLubyte b, GLubyte a );
 506
 507 extern void xmesa_alloc_back_buffer( XMesaBuffer b );
 508
 509 extern void xmesa_update_state( GLcontext *ctx );
 510
 511 extern points_func xmesa_get_points_func( GLcontext *ctx );
 512
 513 extern line_func xmesa_get_line_func( GLcontext *ctx );
 514
 515 extern triangle_func xmesa_get_triangle_func( GLcontext *ctx );
 516
 517
 518 /* XXX this is a hack to implement shared display lists with 3Dfx */
 519 extern XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v,
 520                                              XMesaWindow w,
 521                                              XMesaContext c
 522                                              DRI_DRAWABLE_ARG
 523                                            );
 524
 525 /*
 526  * These are the extra routines required for integration with XFree86.
 527  * None of these routines should be user visible. -KEM
 528  */
 529 extern void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v );
 530 extern GLboolean XMesaForceCurrent(XMesaContext c);
 531 extern GLboolean XMesaLoseCurrent(XMesaContext c);
 532 extern void XMesaReset( void );
 533
 534 #endif