src/mesa/drivers/x11/xmesaP.h

   1 /* $Id: xmesaP.h,v 1.1 1999/08/19 00:55:42 jtg Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.1
   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 "xf86glx_util.h"
  34 #else
  35 #ifdef SHM
  36 #include <X11/extensions/XShm.h>
  37 #endif
  38 #endif
  39 #include "GL/xmesa.h"
  40 #include "types.h"
  41 #ifdef FX
  42 #include "GL/fxmesa.h"
  43 #include "../FX/fxdrv.h"
  44 #endif
  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 /*
  56  * "Derived" from gl_visual.  Basically corresponds to an XVisualInfo.
  57  */
  58 struct xmesa_visual {
  59    GLvisual *gl_visual;         /* Device independent visual parameters */
  60    XMesaDisplay *display;       /* The X11 display */
  61 #ifndef XFree86Server
  62    XVisualInfo *vishandle;      /* The pointer returned by glXChooseVisual */
  63 #endif
  64    XMesaVisualInfo visinfo;     /* X's visual info */
  65
  66    GLint level;                 /* 0=normal, 1=overlay, etc */
  67
  68    GLboolean ximage_flag;       /* Use XImage for back buffer (not pixmap)? */
  69
  70    GLuint dithered_pf;          /* Pixel format when dithering */
  71    GLuint undithered_pf;        /* Pixel format when not dithering */
  72
  73    GLfloat RedGamma;            /* Gamma values, 1.0 is default */
  74    GLfloat GreenGamma;
  75    GLfloat BlueGamma;
  76
  77    GLint rmult, gmult, bmult;   /* Range of color values */
  78    GLint index_bits;            /* Bits per pixel in CI mode */
  79
  80    /* For PF_TRUECOLOR */
  81    GLint rshift, gshift, bshift;/* Pixel color component shifts */
  82    GLubyte Kernel[16];          /* Dither kernel */
  83    unsigned long RtoPixel[512]; /* RGB to pixel conversion */
  84    unsigned long GtoPixel[512];
  85    unsigned long BtoPixel[512];
  86    GLubyte PixelToR[256];       /* Pixel to RGB conversion */
  87    GLubyte PixelToG[256];
  88    GLubyte PixelToB[256];
  89
  90    /* For PF_HPCR */
  91    short       hpcr_rgbTbl[3][256];
  92    GLboolean   hpcr_clear_flag;
  93    GLubyte     hpcr_clear_ximage_pattern[2][16];
  94    XMesaImage *hpcr_clear_ximage;
  95    XMesaPixmap hpcr_clear_pixmap;
  96
  97    /* For PF_1BIT */
  98    int bitFlip;
  99 };
 100
 101
 102
 103 /*
 104  * "Derived" from gl_context.  Basically corresponds to a GLXContext.
 105  */
 106 struct xmesa_context {
 107    GLcontext *gl_ctx;           /* the core library context */
 108    XMesaVisual xm_visual;       /* Describes the buffers */
 109    XMesaBuffer xm_buffer;       /* current framebuffer */
 110
 111    XMesaDisplay *display;       /* == xm_visual->display */
 112    GLboolean swapbytes;         /* Host byte order != display byte order? */
 113    GLboolean direct;            /* Direct rendering context? */
 114
 115    GLuint pixelformat;          /* Current pixel format */
 116
 117    GLubyte red, green, blue, alpha;     /* current drawing color */
 118    unsigned long pixel;                 /* current drawing pixel value */
 119
 120    GLubyte clearcolor[4];               /* current clearing color */
 121    unsigned long clearpixel;            /* current clearing pixel value */
 122 };
 123
 124
 125
 126 /*
 127  * "Derived" from gl_buffer.  Basically corresponds to a GLXDrawable.
 128  */
 129 struct xmesa_buffer {
 130    GLboolean wasCurrent;        /* was ever the current buffer? */
 131    GLframebuffer *gl_buffer;    /* depth, stencil, accum, etc buffers */
 132    XMesaVisual xm_visual;       /* the X/Mesa visual */
 133
 134    XMesaContext xm_context;     /* the context associated with this buffer */
 135    XMesaDisplay *display;
 136    GLboolean pixmap_flag;       /* is the buffer a Pixmap? */
 137    XMesaDrawable frontbuffer;   /* either a window or pixmap */
 138    XMesaPixmap backpixmap;      /* back buffer Pixmap */
 139    XMesaImage *backimage;       /* back buffer simulated XImage */
 140
 141    XMesaDrawable buffer;        /* the current buffer, either equal to */
 142                                 /* frontbuffer, backpixmap or XIMAGE (None) */
 143
 144    XMesaColormap cmap;          /* the X colormap */
 145
 146    GLint db_state;              /* 0 = single buffered */
 147                                 /* BACK_PIXMAP = use Pixmap for back buffer */
 148                                 /* BACK_XIMAGE = use XImage for back buffer */
 149
 150 #ifndef XFree86Server
 151    GLuint shm;                  /* X Shared Memory extension status:    */
 152                                 /*    0 = not available                 */
 153                                 /*    1 = XImage support available      */
 154                                 /*    2 = Pixmap support available too  */
 155 #ifdef SHM
 156    XShmSegmentInfo shminfo;
 157 #endif
 158 #endif
 159
 160    XMesaImage *rowimage;        /* Used for optimized span writing */
 161
 162    GLuint width, height;        /* size of buffer */
 163
 164    GLint bottom;                /* used for FLIP macro below */
 165    GLubyte *ximage_origin1;     /* used for PIXELADDR1 macro */
 166    GLint ximage_width1;
 167    GLushort *ximage_origin2;    /* used for PIXELADDR2 macro */
 168    GLint ximage_width2;
 169    bgr_t *ximage_origin3;       /* used for PIXELADDR3 macro */
 170    GLint ximage_width3;
 171    GLuint *ximage_origin4;      /* used for PIXELADDR4 macro */
 172    GLint ximage_width4;
 173
 174    XMesaPixmap stipple_pixmap;  /* For polygon stippling */
 175    XMesaGC stipple_gc;          /* For polygon stippling */
 176
 177    XMesaGC gc1;                 /* GC for infrequent color changes */
 178    XMesaGC gc2;                 /* GC for frequent color changes */
 179    XMesaGC cleargc;             /* GC for clearing the color buffer */
 180
 181    /* The following are here instead of in the XMesaVisual
 182     * because they depend on the window's colormap.
 183     */
 184
 185    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 186    unsigned long color_table[576];      /* RGB -> pixel value */
 187
 188    /* For PF_DITHER, PF_LOOKUP, PF_GRAYSCALE */
 189    GLubyte pixel_to_r[65536];           /* pixel value -> red */
 190    GLubyte pixel_to_g[65536];           /* pixel value -> green */
 191    GLubyte pixel_to_b[65536];           /* pixel value -> blue */
 192
 193    /* Used to do XAllocColor/XFreeColors accounting: */
 194    int num_alloced;
 195    unsigned long alloced_colors[256];
 196
 197 #ifdef FX
 198    /* For 3Dfx Glide only */
 199    GLboolean FXisHackUsable;    /* Can we render into window? */
 200    GLboolean FXwindowHack;      /* Are we rendering into a window? */
 201    fxMesaContext FXctx;
 202 #endif
 203
 204    struct xmesa_buffer *Next;   /* Linked list pointer: */
 205 };
 206
 207
 208
 209 /* Values for xmesa->dest: */
 210 #define FRONT_PIXMAP    1
 211 #define BACK_PIXMAP     2
 212 #define BACK_XIMAGE     4
 213
 214
 215 /* Values for xmesa->pixelformat: */
 216 #define PF_INDEX          1     /* Color Index mode */
 217 #define PF_TRUECOLOR      2     /* TrueColor or DirectColor, any depth */
 218 #define PF_TRUEDITHER     3     /* TrueColor with dithering */
 219 #define PF_8A8B8G8R       4     /* 32-bit TrueColor:  8-A, 8-B, 8-G, 8-R */
 220 #define PF_8R8G8B         5     /* 32-bit TrueColor:  8-R, 8-G, 8-B bits */
 221 #define PF_5R6G5B         6     /* 16-bit TrueColor:  5-R, 6-G, 5-B bits */
 222 #define PF_DITHER         7     /* Color-mapped RGB with dither */
 223 #define PF_LOOKUP         8     /* Color-mapped RGB without dither */
 224 #define PF_HPCR           9     /* HP Color Recovery (ad@lms.be 30/08/95) */
 225 #define PF_1BIT          10     /* monochrome dithering of RGB */
 226 #define PF_GRAYSCALE     11     /* Grayscale or StaticGray */
 227 #define PF_8R8G8B24      12     /* 24-bit TrueColor: 8-R, 8-G, 8-B bits */
 228 #define PF_DITHER_5R6G5B 13     /* 16-bit dithered TrueColor: 5-R, 6-G, 5-B */
 229
 230
 231 /*
 232  * If pixelformat==PF_TRUECOLOR:
 233  */
 234 #define PACK_TRUECOLOR( PIXEL, R, G, B )        \
 235    PIXEL = xmesa->xm_visual->RtoPixel[R]        \
 236          | xmesa->xm_visual->GtoPixel[G]        \
 237          | xmesa->xm_visual->BtoPixel[B];       \
 238
 239
 240 /*
 241  * If pixelformat==PF_TRUEDITHER:
 242  */
 243 #define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B )                 \
 244 {                                                               \
 245    int d = xmesa->xm_visual->Kernel[((X)&3) | (((Y)&3)<<2)];    \
 246    PIXEL = xmesa->xm_visual->RtoPixel[(R)+d]                    \
 247          | xmesa->xm_visual->GtoPixel[(G)+d]                    \
 248          | xmesa->xm_visual->BtoPixel[(B)+d];                   \
 249 }
 250
 251
 252
 253 /*
 254  * If pixelformat==PF_8A8B8G8R:
 255  */
 256 #define PACK_8A8B8G8R( R, G, B, A )     \
 257         ( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
 258
 259
 260 /*
 261  * Like PACK_8A8B8G8R() but don't use alpha.  This is usually an acceptable
 262  * shortcut.
 263  */
 264 #define PACK_8B8G8R( R, G, B )   ( ((B) << 16) | ((G) << 8) | (R) )
 265
 266
 267
 268 /*
 269  * If pixelformat==PF_8R8G8B:
 270  */
 271 #define PACK_8R8G8B( R, G, B)    ( ((R) << 16) | ((G) << 8) | (B) )
 272
 273
 274 /*
 275  * If pixelformat==PF_5R6G5B:
 276  */
 277 #define PACK_5R6G5B( R, G, B)    ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
 278
 279
 280
 281 /*
 282  * If pixelformat==PF_DITHER:
 283  *
 284  * Improved 8-bit RGB dithering code contributed by Bob Mercier
 285  * (mercier@hollywood.cinenet.net).  Thanks Bob!
 286  */
 287 #undef _R
 288 #undef _G
 289 #undef _B
 290 #ifdef DITHER666
 291 # define _R   6
 292 # define _G   6
 293 # define _B   6
 294 # define _MIX(r,g,b)  (((r)*_G+(g))*_B+(b))
 295 #else
 296 # define _R     5
 297 # define _G     9
 298 # define _B     5
 299 # define _MIX(r,g,b)    ( ((g)<<6) | ((b)<<3) | (r) )
 300 #endif
 301 #define _DX     4
 302 #define _DY     4
 303 #define _D      (_DX*_DY)
 304
 305 /*#define _DITH(C,c,d)  (((unsigned)((_D*(C-1)+1)*c+d))/(_D*256))*/
 306 #define _DITH(C,c,d)    (((unsigned)((_D*(C-1)+1)*c+d)) >> 12)
 307
 308 #define MAXC    256
 309 static int kernel8[_DY*_DX] = {
 310     0 * MAXC,  8 * MAXC,  2 * MAXC, 10 * MAXC,
 311    12 * MAXC,  4 * MAXC, 14 * MAXC,  6 * MAXC,
 312     3 * MAXC, 11 * MAXC,  1 * MAXC,  9 * MAXC,
 313    15 * MAXC,  7 * MAXC, 13 * MAXC,  5 * MAXC,
 314 };
 315 /*static int __d;*/
 316
 317 /* Dither for random X,Y */
 318 #define DITHER_SETUP                                            \
 319         int __d;                                                \
 320         unsigned long *ctable = xmesa->xm_buffer->color_table;
 321
 322 #define DITHER( X, Y, R, G, B )                         \
 323         (__d = kernel8[(((Y)&3)<<2) | ((X)&3)],         \
 324          ctable[_MIX(_DITH(_R, (R), __d),               \
 325                      _DITH(_G, (G), __d),               \
 326                      _DITH(_B, (B), __d))])
 327
 328 /* Dither for random X, fixed Y */
 329 #define XDITHER_SETUP(Y)                                        \
 330         int __d;                                                \
 331         unsigned long *ctable = xmesa->xm_buffer->color_table;  \
 332         int *kernel = &kernel8[ ((Y)&3) << 2 ];
 333
 334 #define XDITHER( X, R, G, B )                           \
 335         (__d = kernel[(X)&3],                           \
 336         ctable[_MIX(_DITH(_R, (R), __d),                \
 337                     _DITH(_G, (G), __d),                \
 338                     _DITH(_B, (B), __d))])
 339
 340
 341
 342 /*
 343  * Dithering for flat-shaded triangles.  Precompute all 16 possible
 344  * pixel values given the triangle's RGB color.  Contributed by Martin Shenk.
 345  */
 346 static GLushort DitherValues[16];   /* array of (up to) 16-bit pixel values */
 347
 348 #define FLAT_DITHER_SETUP( R, G, B )                                    \
 349         {                                                               \
 350            unsigned long *ctable = xmesa->xm_buffer->color_table;       \
 351            int msdr = (_D*((_R)-1)+1) * (R);                            \
 352            int msdg = (_D*((_G)-1)+1) * (G);                            \
 353            int msdb = (_D*((_B)-1)+1) * (B);                            \
 354            int i;                                                       \
 355            for (i=0;i<16;i++) {                                         \
 356               int k = kernel8[i];                                       \
 357               int j = _MIX( (msdr+k)>>12, (msdg+k)>>12, (msdb+k)>>12 ); \
 358               DitherValues[i] = (GLushort) ctable[j];                   \
 359            }                                                            \
 360         }
 361
 362 #define FLAT_DITHER_ROW_SETUP(Y)                                        \
 363         GLushort *ditherRow = DitherValues + ( ((Y)&3) << 2);
 364
 365 #define FLAT_DITHER(X)  ditherRow[(X)&3]
 366
 367
 368
 369 /*
 370  * If pixelformat==PF_LOOKUP:
 371  */
 372 #define _DITH0(C,c)     (((unsigned)((_D*(C-1)+1)*c)) >> 12)
 373
 374 #define LOOKUP_SETUP                                            \
 375         unsigned long *ctable = xmesa->xm_buffer->color_table
 376
 377 #define LOOKUP( R, G, B )                       \
 378         ctable[_MIX(_DITH0(_R, (R)),            \
 379                     _DITH0(_G, (G)),            \
 380                     _DITH0(_B, (B)))]
 381
 382
 383
 384 /*
 385  * If pixelformat==PF_HPCR:
 386  *
 387  *      HP Color Recovery dithering               (ad@lms.be 30/08/95)
 388  *      HP has on it's 8-bit 700-series computers, a feature called
 389  *      'Color Recovery'.  This allows near 24-bit output (so they say).
 390  *      It is enabled by selecting the 8-bit  TrueColor  visual AND
 391  *      corresponding  colormap (see tkInitWindow) AND doing some special
 392  *      dither.
 393  */
 394 static const short HPCR_DRGB[3][2][16] = {
 395 {
 396     { 16, -4,  1,-11, 14, -6,  3, -9, 15, -5,  2,-10, 13, -7,  4, -8},
 397     {-15,  5,  0, 12,-13,  7, -2, 10,-14,  6, -1, 11,-12,  8, -3,  9}
 398 },
 399 {
 400     {-11, 15, -7,  3, -8, 14, -4,  2,-10, 16, -6,  4, -9, 13, -5,  1},
 401     { 12,-14,  8, -2,  9,-13,  5, -1, 11,-15,  7, -3, 10,-12,  6,  0}
 402 },
 403 {
 404     {  6,-18, 26,-14,  2,-22, 30,-10,  8,-16, 28,-12,  4,-20, 32, -8},
 405     { -4, 20,-24, 16,  0, 24,-28, 12, -6, 18,-26, 14, -2, 22,-30, 10}
 406 }
 407 };
 408
 409 #define DITHER_HPCR( X, Y, R, G, B )                                       \
 410   ( ((xmesa->xm_visual->hpcr_rgbTbl[0][R] + HPCR_DRGB[0][(Y)&1][(X)&15]) & 0xE0)     \
 411   |(((xmesa->xm_visual->hpcr_rgbTbl[1][G] + HPCR_DRGB[1][(Y)&1][(X)&15]) & 0xE0)>>3) \
 412   | ((xmesa->xm_visual->hpcr_rgbTbl[2][B] + HPCR_DRGB[2][(Y)&1][(X)&15])>>6)       \
 413   )
 414
 415
 416
 417 /*
 418  * If pixelformat==PF_1BIT:
 419  */
 420 static int const kernel1[16] = {
 421    0*47,  9*47,  4*47, 12*47,     /* 47 = (255*3)/16 */
 422    6*47,  2*47, 14*47,  8*47,
 423   10*47,  1*47,  5*47, 11*47,
 424    7*47, 13*47,  3*47, 15*47 };
 425
 426 #define SETUP_1BIT  int bitFlip = xmesa->xm_visual->bitFlip
 427 #define DITHER_1BIT( X, Y, R, G, B )    \
 428         (( ((int)(R)+(int)(G)+(int)(B)) > kernel1[(((Y)&3) << 2) | ((X)&3)] ) ^ bitFlip)
 429
 430
 431
 432 /*
 433  * If pixelformat==PF_GRAYSCALE:
 434  */
 435 #define GRAY_RGB( R, G, B )   xmesa->xm_buffer->color_table[((R) + (G) + (B))/3]
 436
 437
 438
 439 #define XIMAGE None
 440
 441
 442 /*
 443  * Converts a GL window Y coord to an X window Y coord:
 444  */
 445 #define FLIP(Y)  (xmesa->xm_buffer->bottom-(Y))
 446
 447
 448 /*
 449  * Return the address of a 1, 2 or 4-byte pixel in the back XImage:
 450  * X==0 is left, Y==0 is bottom.
 451  */
 452 #define PIXELADDR1( X, Y )  \
 453       ( xmesa->xm_buffer->ximage_origin1 - (Y) * xmesa->xm_buffer->ximage_width1 + (X) )
 454
 455 #define PIXELADDR2( X, Y )  \
 456       ( xmesa->xm_buffer->ximage_origin2 - (Y) * xmesa->xm_buffer->ximage_width2 + (X) )
 457
 458 #define PIXELADDR3( X, Y )  \
 459       ( xmesa->xm_buffer->ximage_origin3 - (Y) * xmesa->xm_buffer->ximage_width3 + (X) )
 460
 461 #define PIXELADDR4( X, Y )  \
 462       ( xmesa->xm_buffer->ximage_origin4 - (Y) * xmesa->xm_buffer->ximage_width4 + (X) )
 463
 464
 465
 466 /*
 467  * External functions:
 468  */
 469
 470 extern unsigned long xmesa_color_to_pixel( XMesaContext xmesa,
 471                                   GLubyte r, GLubyte g, GLubyte b, GLubyte a );
 472
 473 extern void xmesa_alloc_back_buffer( XMesaBuffer b );
 474
 475 extern void xmesa_update_state( GLcontext *ctx );
 476
 477 extern points_func xmesa_get_points_func( GLcontext *ctx );
 478
 479 extern line_func xmesa_get_line_func( GLcontext *ctx );
 480
 481 extern triangle_func xmesa_get_triangle_func( GLcontext *ctx );
 482
 483
 484 /* XXX this is a hack to implement shared display lists with 3Dfx */
 485 extern XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v,
 486                                              XMesaWindow w,
 487                                              XMesaContext c );
 488
 489
 490 /*
 491  * These are the extra routines required for integration with XFree86.
 492  * None of these routines should be user visible. -KEM
 493  */
 494 extern void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v );
 495 extern GLboolean XMesaForceCurrent(XMesaContext c);
 496 extern GLboolean XMesaLoseCurrent(XMesaContext c);
 497 extern void XMesaReset( void );
 498
 499 #endif