xm_api.c revision b6bcae5698df88f7730d40004ce7ce0462e97a20
1/* $Id: xm_api.c,v 1.16 2001/01/23 23:39:37 brianp Exp $ */ 2 3/* 4 * Mesa 3-D graphics library 5 * Version: 3.5 6 * 7 * Copyright (C) 1999-2000 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/* 29 * This file contains the implementations of all the XMesa* functions. 30 * 31 * 32 * NOTES: 33 * 34 * The window coordinate system origin (0,0) is in the lower-left corner 35 * of the window. X11's window coordinate origin is in the upper-left 36 * corner of the window. Therefore, most drawing functions in this 37 * file have to flip Y coordinates. 38 * 39 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 40 * in support for the MIT Shared Memory extension. If enabled, when you 41 * use an Ximage for the back buffer in double buffered mode, the "swap" 42 * operation will be faster. You must also link with -lXext. 43 * 44 * Byte swapping: If the Mesa host and the X display use a different 45 * byte order then there's some trickiness to be aware of when using 46 * XImages. The byte ordering used for the XImage is that of the X 47 * display, not the Mesa host. 48 * The color-to-pixel encoding for True/DirectColor must be done 49 * according to the display's visual red_mask, green_mask, and blue_mask. 50 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 51 * do byte swapping if needed. If one wants to directly "poke" the pixel 52 * into the XImage's buffer then the pixel must be byte swapped first. In 53 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 54 * and use XPutPixel everywhere except in the implementation of 55 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 56 * instead of using XPutPixel we "poke" our values after byte-swapping 57 * the clear pixel value if needed. 58 * 59 */ 60 61#ifdef __CYGWIN__ 62#undef WIN32 63#undef __WIN32__ 64#endif 65 66#include "glxheader.h" 67#include "GL/xmesa.h" 68#include "xmesaP.h" 69#include "context.h" 70#include "extensions.h" 71#include "glthread.h" 72#include "matrix.h" 73#include "mem.h" 74#include "mtypes.h" 75#ifdef HAVE_CONFIG_H 76#include "conf.h" 77#endif 78#include "macros.h" 79#include "swrast/swrast.h" 80#include "swrast_setup/swrast_setup.h" 81#include "array_cache/acache.h" 82#include "tnl/tnl.h" 83 84#ifndef GLX_NONE_EXT 85#define GLX_NONE_EXT 0x8000 86#endif 87 88 89/* 90 * Global X driver lock 91 */ 92_glthread_Mutex _xmesa_lock; 93 94 95 96/* 97 * Lookup tables for HPCR pixel format: 98 */ 99static short hpcr_rgbTbl[3][256] = { 100{ 101 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 102 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 103 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 104 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 105 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 106 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 107 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 108 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 109112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 110128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 111144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 112160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 113176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 114192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 115208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 116224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 117}, 118{ 119 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 120 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 121 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 122 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 123 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 124 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 125 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 126 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 127112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 129144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 130160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 131176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 132192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 133208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 134224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 135}, 136{ 137 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 138 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 139 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 140 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 141 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 142 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 143 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 144 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 145 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 146112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 147128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 148144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 149160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 150176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 151192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 152208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 153} 154}; 155 156 157 158/**********************************************************************/ 159/***** X Utility Functions *****/ 160/**********************************************************************/ 161 162 163/* 164 * X/Mesa error reporting function: 165 */ 166static void error( const char *msg ) 167{ 168 if (getenv("MESA_DEBUG")) 169 fprintf( stderr, "X/Mesa error: %s\n", msg ); 170} 171 172 173/* 174 * Return the host's byte order as LSBFirst or MSBFirst ala X. 175 */ 176#ifndef XFree86Server 177static int host_byte_order( void ) 178{ 179 int i = 1; 180 char *cptr = (char *) &i; 181 return (*cptr==1) ? LSBFirst : MSBFirst; 182} 183#endif 184 185 186/* 187 * Error handling. 188 */ 189#ifndef XFree86Server 190static int mesaXErrorFlag = 0; 191 192static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 193{ 194 (void) dpy; 195 (void) event; 196 mesaXErrorFlag = 1; 197 return 0; 198} 199#endif 200 201 202/* 203 * Check if the X Shared Memory extension is available. 204 * Return: 0 = not available 205 * 1 = shared XImage support available 206 * 2 = shared Pixmap support available also 207 */ 208#ifndef XFree86Server 209static int check_for_xshm( XMesaDisplay *display ) 210{ 211#ifdef USE_XSHM 212 int major, minor, ignore; 213 Bool pixmaps; 214 215 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 216 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 217 return (pixmaps==True) ? 2 : 1; 218 } 219 else { 220 return 0; 221 } 222 } 223 else { 224 return 0; 225 } 226#else 227 /* Can't compile XSHM support */ 228 return 0; 229#endif 230} 231#endif 232 233 234/* 235 * Return the width and height of the given drawable. 236 */ 237static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 238 unsigned int *width, unsigned int *height) 239{ 240#ifdef XFree86Server 241 (void) dpy; 242 *width = d->width; 243 *height = d->height; 244#else 245 Window root; 246 int x, y; 247 unsigned int bw, depth; 248 249 _glthread_LOCK_MUTEX(_xmesa_lock); 250 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 251 _glthread_UNLOCK_MUTEX(_xmesa_lock); 252#endif 253} 254 255 256/* 257 * Apply gamma correction to an intensity value in [0..max]. Return the 258 * new intensity value. 259 */ 260static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 261{ 262 if (gamma == 1.0) { 263 return value; 264 } 265 else { 266 double x = (double) value / (double) max; 267 return (GLint) ((GLfloat) max * pow( x, 1.0F/gamma ) + 0.5F); 268 } 269} 270 271 272 273/* 274 * Return the true number of bits per pixel for XImages. 275 * For example, if we request a 24-bit deep visual we may actually need/get 276 * 32bpp XImages. This function returns the appropriate bpp. 277 * Input: dpy - the X display 278 * visinfo - desribes the visual to be used for XImages 279 * Return: true number of bits per pixel for XImages 280 */ 281#define GET_BITS_PER_PIXEL(xmv) bits_per_pixel(xmv) 282 283#ifdef XFree86Server 284 285static int bits_per_pixel( XMesaVisual xmv ) 286{ 287 XMesaVisualInfo visinfo = xmv->visinfo; 288 const int depth = visinfo->nplanes; 289 int i; 290 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 291 if (screenInfo.formats[i].depth == depth) 292 return screenInfo.formats[i].bitsPerPixel; 293 } 294 return depth; /* should never get here, but this should be safe */ 295} 296 297#else 298 299static int bits_per_pixel( XMesaVisual xmv ) 300{ 301 XMesaDisplay *dpy = xmv->display; 302 XMesaVisualInfo visinfo = xmv->visinfo; 303 XMesaImage *img; 304 int bitsPerPixel; 305 /* Create a temporary XImage */ 306 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 307 ZPixmap, 0, /*format, offset*/ 308 (char*) MALLOC(8), /*data*/ 309 1, 1, /*width, height*/ 310 32, /*bitmap_pad*/ 311 0 /*bytes_per_line*/ 312 ); 313 assert(img); 314 /* grab the bits/pixel value */ 315 bitsPerPixel = img->bits_per_pixel; 316 /* free the XImage */ 317 FREE( img->data ); 318 img->data = NULL; 319 XMesaDestroyImage( img ); 320 return bitsPerPixel; 321} 322#endif 323 324 325 326/* 327 * Determine if a given X window ID is valid (window exists). 328 * Do this by calling XGetWindowAttributes() for the window and 329 * checking if we catch an X error. 330 * Input: dpy - the display 331 * win - the window to check for existance 332 * Return: GL_TRUE - window exists 333 * GL_FALSE - window doesn't exist 334 */ 335#ifndef XFree86Server 336static GLboolean WindowExistsFlag; 337 338static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 339{ 340 (void) dpy; 341 if (xerr->error_code == BadWindow) { 342 WindowExistsFlag = GL_FALSE; 343 } 344 return 0; 345} 346 347static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 348{ 349 XWindowAttributes wa; 350 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 351 WindowExistsFlag = GL_TRUE; 352 old_handler = XSetErrorHandler(window_exists_err_handler); 353 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 354 XSetErrorHandler(old_handler); 355 return WindowExistsFlag; 356} 357#endif 358 359 360 361/**********************************************************************/ 362/***** Linked list of XMesaBuffers *****/ 363/**********************************************************************/ 364 365static XMesaBuffer XMesaBufferList = NULL; 366 367 368/* Allocate a new XMesaBuffer, add to linked list */ 369static XMesaBuffer alloc_xmesa_buffer(void) 370{ 371 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 372 if (b) { 373 b->Next = XMesaBufferList; 374 XMesaBufferList = b; 375 } 376 return b; 377} 378 379 380/* 381 * Find an XMesaBuffer by matching X display and colormap but NOT matching 382 * the notThis buffer. 383 */ 384static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 385 XMesaColormap cmap, 386 XMesaBuffer notThis) 387{ 388 XMesaBuffer b; 389 for (b=XMesaBufferList; b; b=b->Next) { 390 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 391 return b; 392 } 393 } 394 return NULL; 395} 396 397 398/* 399 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 400 * entries. 401 */ 402static void free_xmesa_buffer(int client, XMesaBuffer buffer) 403{ 404 XMesaBuffer prev = NULL, b; 405 (void) client; 406 for (b=XMesaBufferList; b; b=b->Next) { 407 if (b==buffer) { 408 /* unlink bufer from list */ 409 if (prev) 410 prev->Next = buffer->Next; 411 else 412 XMesaBufferList = buffer->Next; 413 /* Check to free X colors */ 414 if (buffer->num_alloced>0) { 415 /* If no other buffer uses this X colormap then free the colors. */ 416 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 417#ifdef XFree86Server 418 (void)FreeColors(buffer->cmap, client, 419 buffer->num_alloced, buffer->alloced_colors, 420 0); 421#else 422 XFreeColors(buffer->display, buffer->cmap, 423 buffer->alloced_colors, buffer->num_alloced, 0); 424#endif 425 } 426 } 427 FREE(buffer); 428 return; 429 } 430 /* continue search */ 431 prev = b; 432 } 433 /* buffer not found in XMesaBufferList */ 434 gl_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 435} 436 437 438/* Copy X color table stuff from one XMesaBuffer to another. */ 439static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 440{ 441 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 442 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 443 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 444 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 445 dst->num_alloced = src->num_alloced; 446 MEMCPY(dst->alloced_colors, src->alloced_colors, 447 sizeof(src->alloced_colors)); 448} 449 450 451 452/**********************************************************************/ 453/***** Misc Private Functions *****/ 454/**********************************************************************/ 455 456 457/* 458 * Return number of bits set in n. 459 */ 460static int bitcount( unsigned long n ) 461{ 462 int bits; 463 for (bits=0; n>0; n=n>>1) { 464 if (n&1) { 465 bits++; 466 } 467 } 468 return bits; 469} 470 471 472 473/* 474 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 475 * Return: GL_TRUE if success, GL_FALSE if error 476 */ 477#ifndef XFree86Server 478static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 479{ 480#ifdef USE_XSHM 481 /* 482 * We have to do a _lot_ of error checking here to be sure we can 483 * really use the XSHM extension. It seems different servers trigger 484 * errors at different points if the extension won't work. Therefore 485 * we have to be very careful... 486 */ 487 GC gc; 488 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 489 490 b->backimage = XShmCreateImage( b->xm_visual->display, 491 b->xm_visual->visinfo->visual, 492 b->xm_visual->visinfo->depth, 493 ZPixmap, NULL, &b->shminfo, 494 b->width, b->height ); 495 if (b->backimage == NULL) { 496 error("alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 497 b->shm = 0; 498 return GL_FALSE; 499 } 500 501 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 502 * b->backimage->height, IPC_CREAT|0777 ); 503 if (b->shminfo.shmid < 0) { 504 if (getenv("MESA_DEBUG")) 505 perror("alloc_back_buffer"); 506 XDestroyImage( b->backimage ); 507 b->backimage = NULL; 508 error("alloc_back_buffer: Shared memory error (shmget), disabling."); 509 b->shm = 0; 510 return GL_FALSE; 511 } 512 513 b->shminfo.shmaddr = b->backimage->data 514 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 515 if (b->shminfo.shmaddr == (char *) -1) { 516 if (getenv("MESA_DEBUG")) 517 perror("alloc_back_buffer"); 518 XDestroyImage( b->backimage ); 519 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 520 b->backimage = NULL; 521 error("alloc_back_buffer: Shared memory error (shmat), disabling."); 522 b->shm = 0; 523 return GL_FALSE; 524 } 525 526 b->shminfo.readOnly = False; 527 mesaXErrorFlag = 0; 528 old_handler = XSetErrorHandler( mesaHandleXError ); 529 /* This may trigger the X protocol error we're ready to catch: */ 530 XShmAttach( b->xm_visual->display, &b->shminfo ); 531 XSync( b->xm_visual->display, False ); 532 533 if (mesaXErrorFlag) { 534 /* we are on a remote display, this error is normal, don't print it */ 535 XFlush( b->xm_visual->display ); 536 mesaXErrorFlag = 0; 537 XDestroyImage( b->backimage ); 538 shmdt( b->shminfo.shmaddr ); 539 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 540 b->backimage = NULL; 541 b->shm = 0; 542 (void) XSetErrorHandler( old_handler ); 543 return GL_FALSE; 544 } 545 546 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 547 548 /* Finally, try an XShmPutImage to be really sure the extension works */ 549 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 550 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 551 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 552 XSync( b->xm_visual->display, False ); 553 XFreeGC( b->xm_visual->display, gc ); 554 (void) XSetErrorHandler( old_handler ); 555 if (mesaXErrorFlag) { 556 XFlush( b->xm_visual->display ); 557 mesaXErrorFlag = 0; 558 XDestroyImage( b->backimage ); 559 shmdt( b->shminfo.shmaddr ); 560 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 561 b->backimage = NULL; 562 b->shm = 0; 563 return GL_FALSE; 564 } 565 566 if (b->backimage) { 567 int height = b->backimage->height; 568 /* Needed by PIXELADDR1 macro */ 569 b->ximage_width1 = b->backimage->bytes_per_line; 570 b->ximage_origin1 = (GLubyte *) b->backimage->data 571 + b->ximage_width1 * (height-1); 572 /* Needed by PIXELADDR2 macro */ 573 b->ximage_width2 = b->backimage->bytes_per_line / 2; 574 b->ximage_origin2 = (GLushort *) b->backimage->data 575 + b->ximage_width2 * (height-1); 576 /* Needed by PIXELADDR3 macro */ 577 b->ximage_width3 = b->backimage->bytes_per_line; 578 b->ximage_origin3 = (GLubyte *) b->backimage->data 579 + b->ximage_width3 * (height-1); 580 /* Needed by PIXELADDR4 macro */ 581 b->ximage_width4 = b->backimage->width; 582 b->ximage_origin4 = (GLuint *) b->backimage->data 583 + b->ximage_width4 * (height-1); 584 } 585 586 return GL_TRUE; 587#else 588 /* Can't compile XSHM support */ 589 return GL_FALSE; 590#endif 591} 592#endif 593 594 595 596/* 597 * Setup an off-screen pixmap or Ximage to use as the back buffer. 598 * Input: b - the X/Mesa buffer 599 */ 600void xmesa_alloc_back_buffer( XMesaBuffer b ) 601{ 602 if (b->db_state==BACK_XIMAGE) { 603 /* Deallocate the old backimage, if any */ 604 if (b->backimage) { 605#if defined(USE_XSHM) && !defined(XFree86Server) 606 if (b->shm) { 607 XShmDetach( b->xm_visual->display, &b->shminfo ); 608 XDestroyImage( b->backimage ); 609 shmdt( b->shminfo.shmaddr ); 610 } 611 else 612#endif 613 XMesaDestroyImage( b->backimage ); 614 b->backimage = NULL; 615 } 616 617 /* Allocate new back buffer */ 618#ifdef XFree86Server 619 { 620 /* Allocate a regular XImage for the back buffer. */ 621 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 622 b->width, b->height, NULL); 623#else 624 if (b->shm==0 625 || alloc_shm_back_buffer(b)==GL_FALSE 626 ) { 627 /* Allocate a regular XImage for the back buffer. */ 628 b->backimage = XCreateImage( b->xm_visual->display, 629 b->xm_visual->visinfo->visual, 630 GET_VISUAL_DEPTH(b->xm_visual), 631 ZPixmap, 0, /* format, offset */ 632 NULL, b->width, b->height, 633 8, 0 ); /* pad, bytes_per_line */ 634#endif 635 if (!b->backimage) { 636 error("alloc_back_buffer: XCreateImage failed."); 637 } 638 b->backimage->data = (char *) MALLOC( b->backimage->height 639 * b->backimage->bytes_per_line ); 640 if (!b->backimage->data) { 641 error("alloc_back_buffer: MALLOC failed."); 642 XMesaDestroyImage( b->backimage ); 643 b->backimage = NULL; 644 } 645 } 646 b->backpixmap = None; 647 } 648 else if (b->db_state==BACK_PIXMAP) { 649 XMesaPixmap old_pixmap = b->backpixmap; 650 /* Free the old back pixmap */ 651 if (b->backpixmap) { 652 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 653 } 654 /* Allocate new back pixmap */ 655 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 656 b->width, b->height, 657 GET_VISUAL_DEPTH(b->xm_visual) ); 658 b->backimage = NULL; 659 /* update other references to backpixmap */ 660 if (b->buffer==(XMesaDrawable)old_pixmap) { 661 b->buffer = (XMesaDrawable)b->backpixmap; 662 } 663 } 664} 665 666 667 668/* 669 * A replacement for XAllocColor. This function should never 670 * fail to allocate a color. When XAllocColor fails, we return 671 * the nearest matching color. If we have to allocate many colors 672 * this function isn't too efficient; the XQueryColors() could be 673 * done just once. 674 * Written by Michael Pichler, Brian Paul, Mark Kilgard 675 * Input: dpy - X display 676 * cmap - X colormap 677 * cmapSize - size of colormap 678 * In/Out: color - the XColor struct 679 * Output: exact - 1=exact color match, 0=closest match 680 * alloced - 1=XAlloc worked, 0=XAlloc failed 681 */ 682static void 683noFaultXAllocColor( int client, 684 XMesaDisplay *dpy, 685 XMesaColormap cmap, 686 int cmapSize, 687 XMesaColor *color, 688 int *exact, int *alloced ) 689{ 690#ifdef XFree86Server 691 Pixel *ppixIn; 692 xrgb *ctable; 693#else 694 /* we'll try to cache ctable for better remote display performance */ 695 static Display *prevDisplay = NULL; 696 static XMesaColormap prevCmap = 0; 697 static int prevCmapSize = 0; 698 static XMesaColor *ctable = NULL; 699#endif 700 XMesaColor subColor; 701 int i, bestmatch; 702 double mindist; /* 3*2^16^2 exceeds long int precision. */ 703 704 (void) client; 705 706 /* First try just using XAllocColor. */ 707#ifdef XFree86Server 708 if (AllocColor(cmap, 709 &color->red, &color->green, &color->blue, 710 &color->pixel, 711 client) == Success) { 712#else 713 if (XAllocColor(dpy, cmap, color)) { 714#endif 715 *exact = 1; 716 *alloced = 1; 717 return; 718 } 719 720 /* Alloc failed, search for closest match */ 721 722 /* Retrieve color table entries. */ 723 /* XXX alloca candidate. */ 724#ifdef XFree86Server 725 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 726 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 727 for (i = 0; i < cmapSize; i++) { 728 ppixIn[i] = i; 729 } 730 QueryColors(cmap, cmapSize, ppixIn, ctable); 731#else 732 if (prevDisplay != dpy || prevCmap != cmap 733 || prevCmapSize != cmapSize || !ctable) { 734 /* free previously cached color table */ 735 if (ctable) 736 FREE(ctable); 737 /* Get the color table from X */ 738 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 739 assert(ctable); 740 for (i = 0; i < cmapSize; i++) { 741 ctable[i].pixel = i; 742 } 743 XQueryColors(dpy, cmap, ctable, cmapSize); 744 prevDisplay = dpy; 745 prevCmap = cmap; 746 prevCmapSize = cmapSize; 747 } 748#endif 749 750 /* Find best match. */ 751 bestmatch = -1; 752 mindist = 0.0; 753 for (i = 0; i < cmapSize; i++) { 754 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 755 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 756 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 757 double dist = dr * dr + dg * dg + db * db; 758 if (bestmatch < 0 || dist < mindist) { 759 bestmatch = i; 760 mindist = dist; 761 } 762 } 763 764 /* Return result. */ 765 subColor.red = ctable[bestmatch].red; 766 subColor.green = ctable[bestmatch].green; 767 subColor.blue = ctable[bestmatch].blue; 768 /* Try to allocate the closest match color. This should only 769 * fail if the cell is read/write. Otherwise, we're incrementing 770 * the cell's reference count. 771 */ 772#ifdef XFree86Server 773 if (AllocColor(cmap, 774 &subColor.red, &subColor.green, &subColor.blue, 775 &subColor.pixel, 776 client) == Success) { 777#else 778 if (XAllocColor(dpy, cmap, &subColor)) { 779#endif 780 *alloced = 1; 781 } 782 else { 783 /* do this to work around a problem reported by Frank Ortega */ 784 subColor.pixel = (unsigned long) bestmatch; 785 subColor.red = ctable[bestmatch].red; 786 subColor.green = ctable[bestmatch].green; 787 subColor.blue = ctable[bestmatch].blue; 788 subColor.flags = DoRed | DoGreen | DoBlue; 789 *alloced = 0; 790 } 791#ifdef XFree86Server 792 FREE(ppixIn); 793 FREE(ctable); 794#else 795 /* don't free table, save it for next time */ 796#endif 797 798 *color = subColor; 799 *exact = 0; 800} 801 802 803 804 805/* 806 * Do setup for PF_GRAYSCALE pixel format. 807 * Note that buffer may be NULL. 808 */ 809static GLboolean setup_grayscale( int client, XMesaVisual v, 810 XMesaBuffer buffer, XMesaColormap cmap ) 811{ 812 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 813 return GL_FALSE; 814 } 815 816 if (buffer) { 817 XMesaBuffer prevBuffer; 818 819 if (!cmap) { 820 return GL_FALSE; 821 } 822 823 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 824 if (prevBuffer && 825 (buffer->xm_visual->gl_visual->rgbMode == 826 prevBuffer->xm_visual->gl_visual->rgbMode)) { 827 /* Copy colormap stuff from previous XMesaBuffer which uses same 828 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 829 */ 830 copy_colortable_info(buffer, prevBuffer); 831 } 832 else { 833 /* Allocate 256 shades of gray */ 834 int gray; 835 int colorsfailed = 0; 836 for (gray=0;gray<256;gray++) { 837 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 838 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 839 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 840 int exact, alloced; 841 XMesaColor xcol; 842 xcol.red = (r << 8) | r; 843 xcol.green = (g << 8) | g; 844 xcol.blue = (b << 8) | b; 845 noFaultXAllocColor( client, v->display, 846 cmap, GET_COLORMAP_SIZE(v), 847 &xcol, &exact, &alloced ); 848 if (!exact) { 849 colorsfailed++; 850 } 851 if (alloced) { 852 assert(buffer->num_alloced<256); 853 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 854 buffer->num_alloced++; 855 } 856 857 /*OLD 858 assert(gray < 576); 859 buffer->color_table[gray*3+0] = xcol.pixel; 860 buffer->color_table[gray*3+1] = xcol.pixel; 861 buffer->color_table[gray*3+2] = xcol.pixel; 862 assert(xcol.pixel < 65536); 863 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 864 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 865 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 866 */ 867 buffer->color_table[gray] = xcol.pixel; 868 assert(xcol.pixel < 65536); 869 buffer->pixel_to_r[xcol.pixel] = gray; 870 buffer->pixel_to_g[xcol.pixel] = gray; 871 buffer->pixel_to_b[xcol.pixel] = gray; 872 } 873 874 if (colorsfailed && getenv("MESA_DEBUG")) { 875 fprintf( stderr, 876 "Note: %d out of 256 needed colors do not match exactly.\n", 877 colorsfailed ); 878 } 879 } 880 } 881 882 v->dithered_pf = PF_GRAYSCALE; 883 v->undithered_pf = PF_GRAYSCALE; 884 return GL_TRUE; 885} 886 887 888 889/* 890 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 891 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 892 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 893 * color. While this function was originally designed just for 8-bit 894 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 895 * Dithering code contributed by Bob Mercier. 896 */ 897static GLboolean setup_dithered_color( int client, XMesaVisual v, 898 XMesaBuffer buffer, XMesaColormap cmap ) 899{ 900 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 901 return GL_FALSE; 902 } 903 904 if (buffer) { 905 XMesaBuffer prevBuffer; 906 907 if (!cmap) { 908 return GL_FALSE; 909 } 910 911 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 912 if (prevBuffer && 913 (buffer->xm_visual->gl_visual->rgbMode == 914 prevBuffer->xm_visual->gl_visual->rgbMode)) { 915 /* Copy colormap stuff from previous, matching XMesaBuffer. 916 * Do this to avoid time spent in noFaultXAllocColor. 917 */ 918 copy_colortable_info(buffer, prevBuffer); 919 } 920 else { 921 /* Allocate X colors and initialize color_table[], red_table[], etc */ 922 int r, g, b, i; 923 int colorsfailed = 0; 924 for (r = 0; r < _R; r++) { 925 for (g = 0; g < _G; g++) { 926 for (b = 0; b < _B; b++) { 927 XMesaColor xcol; 928 int exact, alloced; 929 xcol.red =gamma_adjust(v->RedGamma, r*65535/(_R-1),65535); 930 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(_G-1),65535); 931 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(_B-1),65535); 932 noFaultXAllocColor( client, v->display, 933 cmap, GET_COLORMAP_SIZE(v), 934 &xcol, &exact, &alloced ); 935 if (!exact) { 936 colorsfailed++; 937 } 938 if (alloced) { 939 assert(buffer->num_alloced<256); 940 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 941 buffer->num_alloced++; 942 } 943 i = _MIX( r, g, b ); 944 assert(i < 576); 945 buffer->color_table[i] = xcol.pixel; 946 assert(xcol.pixel < 65536); 947 buffer->pixel_to_r[xcol.pixel] = r * 255 / (_R-1); 948 buffer->pixel_to_g[xcol.pixel] = g * 255 / (_G-1); 949 buffer->pixel_to_b[xcol.pixel] = b * 255 / (_B-1); 950 } 951 } 952 } 953 954 if (colorsfailed && getenv("MESA_DEBUG")) { 955 fprintf( stderr, 956 "Note: %d out of %d needed colors do not match exactly.\n", 957 colorsfailed, _R*_G*_B ); 958 } 959 } 960 } 961 962 v->dithered_pf = PF_DITHER; 963 v->undithered_pf = PF_LOOKUP; 964 return GL_TRUE; 965} 966 967 968/* 969 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 970 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 971 * Special dithering tables have to be initialized. 972 */ 973static void setup_8bit_hpcr( XMesaVisual v ) 974{ 975 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 976 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 977 * on the root window AND the colormap obtainable by XGetRGBColormaps 978 * for that atom must be set on the window. (see also tkInitWindow) 979 * If that colormap is not set, the output will look stripy. 980 */ 981 982 /* Setup color tables with gamma correction */ 983 int i; 984 double g; 985 986 g = 1.0 / v->RedGamma; 987 for (i=0; i<256; i++) { 988 GLint red = (GLint) (255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g ) + 0.5); 989 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 990 } 991 992 g = 1.0 / v->GreenGamma; 993 for (i=0; i<256; i++) { 994 GLint green = (GLint) (255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g ) + 0.5); 995 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 996 } 997 998 g = 1.0 / v->BlueGamma; 999 for (i=0; i<256; i++) { 1000 GLint blue = (GLint) (255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g ) + 0.5); 1001 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 1002 } 1003 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 1004 v->dithered_pf = PF_HPCR; 1005 1006 /* which method should I use to clear */ 1007 /* GL_FALSE: keep the ordinary method */ 1008 /* GL_TRUE : clear with dither pattern */ 1009 v->hpcr_clear_flag = getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 1010 1011 if (v->hpcr_clear_flag) { 1012 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 1013 DefaultRootWindow(v->display), 1014 16, 2, 8); 1015#ifndef XFree86Server 1016 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1017 0, 0, 16, 2, AllPlanes, ZPixmap); 1018#endif 1019 } 1020} 1021 1022 1023/* 1024 * Setup RGB rendering for a window with a True/DirectColor visual. 1025 */ 1026static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1027 XMesaWindow window, XMesaColormap cmap ) 1028{ 1029 unsigned long rmask, gmask, bmask; 1030 (void) buffer; 1031 (void) window; 1032 (void) cmap; 1033 1034 /* Compute red multiplier (mask) and bit shift */ 1035 v->rshift = 0; 1036 rmask = GET_REDMASK(v); 1037 while ((rmask & 1)==0) { 1038 v->rshift++; 1039 rmask = rmask >> 1; 1040 } 1041 1042 /* Compute green multiplier (mask) and bit shift */ 1043 v->gshift = 0; 1044 gmask = GET_GREENMASK(v); 1045 while ((gmask & 1)==0) { 1046 v->gshift++; 1047 gmask = gmask >> 1; 1048 } 1049 1050 /* Compute blue multiplier (mask) and bit shift */ 1051 v->bshift = 0; 1052 bmask = GET_BLUEMASK(v); 1053 while ((bmask & 1)==0) { 1054 v->bshift++; 1055 bmask = bmask >> 1; 1056 } 1057 1058 /* 1059 * Compute component-to-pixel lookup tables and dithering kernel 1060 */ 1061 { 1062 static GLubyte kernel[16] = { 1063 0*16, 8*16, 2*16, 10*16, 1064 12*16, 4*16, 14*16, 6*16, 1065 3*16, 11*16, 1*16, 9*16, 1066 15*16, 7*16, 13*16, 5*16, 1067 }; 1068 GLint rBits = bitcount(rmask); 1069 GLint gBits = bitcount(gmask); 1070 GLint bBits = bitcount(bmask); 1071 GLint maxBits; 1072 GLuint i; 1073 1074 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1075 for (i=0; i<=rmask; i++) 1076 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1077 for (i=0; i<=gmask; i++) 1078 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1079 for (i=0; i<=bmask; i++) 1080 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1081 1082 /* convert RGB values from [0,255] to pixel components */ 1083 1084 for (i=0;i<256;i++) { 1085 GLint r = gamma_adjust(v->RedGamma, i, 255); 1086 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1087 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1088 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1089 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1090 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1091 } 1092 /* overflow protection */ 1093 for (i=256;i<512;i++) { 1094 v->RtoPixel[i] = v->RtoPixel[255]; 1095 v->GtoPixel[i] = v->GtoPixel[255]; 1096 v->BtoPixel[i] = v->BtoPixel[255]; 1097 } 1098 1099 /* setup dithering kernel */ 1100 maxBits = rBits; 1101 if (gBits > maxBits) maxBits = gBits; 1102 if (bBits > maxBits) maxBits = bBits; 1103 for (i=0;i<16;i++) { 1104 v->Kernel[i] = kernel[i] >> maxBits; 1105 } 1106 1107 v->undithered_pf = PF_TRUECOLOR; 1108 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_TRUEDITHER : PF_TRUECOLOR; 1109 } 1110 1111 /* 1112 * Now check for TrueColor visuals which we can optimize. 1113 */ 1114 if ( GET_REDMASK(v) ==0x0000ff 1115 && GET_GREENMASK(v)==0x00ff00 1116 && GET_BLUEMASK(v) ==0xff0000 1117 && CHECK_BYTE_ORDER(v) 1118 && v->BitsPerPixel==32 1119 && sizeof(GLuint)==4 1120 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1121 /* common 32 bpp config used on SGI, Sun */ 1122 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1123 } 1124 else if (GET_REDMASK(v) ==0xff0000 1125 && GET_GREENMASK(v)==0x00ff00 1126 && GET_BLUEMASK(v) ==0x0000ff 1127 && CHECK_BYTE_ORDER(v) 1128 && v->BitsPerPixel==32 1129 && sizeof(GLuint)==4 1130 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1131 /* common 32 bpp config used on Linux, HP, IBM */ 1132 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1133 } 1134 else if (GET_REDMASK(v) ==0xff0000 1135 && GET_GREENMASK(v)==0x00ff00 1136 && GET_BLUEMASK(v) ==0x0000ff 1137 && CHECK_BYTE_ORDER(v) 1138 && v->BitsPerPixel==24 1139 && sizeof(GLuint)==4 1140 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1141 /* common packed 24 bpp config used on Linux */ 1142 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1143 } 1144 else if (GET_REDMASK(v) ==0xf800 1145 && GET_GREENMASK(v)==0x07e0 1146 && GET_BLUEMASK(v) ==0x001f 1147 && CHECK_BYTE_ORDER(v) 1148 && v->BitsPerPixel==16 1149 && sizeof(GLushort)==2 1150 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1151 /* 5-6-5 color weight on common PC VGA boards */ 1152 v->undithered_pf = PF_5R6G5B; 1153 v->dithered_pf = PF_DITHER_5R6G5B; 1154 } 1155 else if (GET_REDMASK(v) ==0xe0 1156 && GET_GREENMASK(v)==0x1c 1157 && GET_BLUEMASK(v) ==0x03 1158 && CHECK_FOR_HPCR(v)) { 1159 setup_8bit_hpcr( v ); 1160 } 1161} 1162 1163 1164 1165/* 1166 * Setup RGB rendering for a window with a monochrome visual. 1167 */ 1168static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1169{ 1170 (void) b; 1171 v->dithered_pf = v->undithered_pf = PF_1BIT; 1172 /* if black=1 then we must flip pixel values */ 1173 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1174} 1175 1176 1177 1178/* 1179 * When a context is "made current" for the first time, we can finally 1180 * finish initializing the context's visual and buffer information. 1181 * Input: v - the XMesaVisual to initialize 1182 * b - the XMesaBuffer to initialize (may be NULL) 1183 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1184 * window - the window/pixmap we're rendering into 1185 * cmap - the colormap associated with the window/pixmap 1186 * Return: GL_TRUE=success, GL_FALSE=failure 1187 */ 1188static GLboolean initialize_visual_and_buffer( int client, 1189 XMesaVisual v, 1190 XMesaBuffer b, 1191 GLboolean rgb_flag, 1192 XMesaDrawable window, 1193 XMesaColormap cmap 1194 ) 1195{ 1196#ifndef XFree86Server 1197 XGCValues gcvalues; 1198#endif 1199 1200 if (b) { 1201 assert(b->xm_visual == v); 1202 } 1203 1204 /* Save true bits/pixel */ 1205 v->BitsPerPixel = GET_BITS_PER_PIXEL(v); 1206 assert(v->BitsPerPixel > 0); 1207 1208 1209 if (rgb_flag==GL_FALSE) { 1210 /* COLOR-INDEXED WINDOW: 1211 * Even if the visual is TrueColor or DirectColor we treat it as 1212 * being color indexed. This is weird but might be useful to someone. 1213 */ 1214 v->dithered_pf = v->undithered_pf = PF_INDEX; 1215 v->index_bits = GET_VISUAL_DEPTH(v); 1216 } 1217 else { 1218 /* RGB WINDOW: 1219 * We support RGB rendering into almost any kind of visual. 1220 */ 1221 int xclass; 1222 xclass = GET_VISUAL_CLASS(v); 1223 if (xclass==TrueColor || xclass==DirectColor) { 1224 setup_truecolor( v, b, (XMesaWindow)window, cmap ); 1225 } 1226 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { 1227 setup_monochrome( v, b ); 1228 } 1229 else if (xclass==GrayScale || xclass==StaticGray) { 1230 if (!setup_grayscale( client, v, b, cmap )) { 1231 return GL_FALSE; 1232 } 1233 } 1234 else if ((xclass==PseudoColor || xclass==StaticColor) 1235 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1236 if (!setup_dithered_color( client, v, b, cmap )) { 1237 return GL_FALSE; 1238 } 1239 } 1240 else { 1241 error("XMesa: RGB mode rendering not supported in given visual."); 1242 return GL_FALSE; 1243 } 1244 v->index_bits = 0; 1245 1246 if (getenv("MESA_NO_DITHER")) { 1247 v->dithered_pf = v->undithered_pf; 1248 } 1249 } 1250 1251 1252 /* 1253 * If MESA_INFO env var is set print out some debugging info 1254 * which can help Brian figure out what's going on when a user 1255 * reports bugs. 1256 */ 1257 if (getenv("MESA_INFO")) { 1258 fprintf(stderr, "X/Mesa visual = %p\n", v); 1259 fprintf(stderr, "X/Mesa dithered pf = %u\n", v->dithered_pf); 1260 fprintf(stderr, "X/Mesa undithered pf = %u\n", v->undithered_pf); 1261 fprintf(stderr, "X/Mesa level = %d\n", v->level); 1262 fprintf(stderr, "X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1263 fprintf(stderr, "X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1264 } 1265 1266 if (b && window) { 1267 /* Do window-specific initializations */ 1268 1269 /* Window dimensions */ 1270 unsigned int w, h; 1271 get_drawable_size( v->display, window, &w, &h ); 1272 b->width = w; 1273 b->height = h; 1274 1275 b->frontbuffer = window; 1276 1277 assert( v->gl_visual ); 1278 1279 /* Setup for single/double buffering */ 1280 if (v->gl_visual->doubleBufferMode) { 1281 /* Double buffered */ 1282#ifndef XFree86Server 1283 b->shm = check_for_xshm( v->display ); 1284#endif 1285 xmesa_alloc_back_buffer( b ); 1286 if (b->db_state==BACK_PIXMAP) { 1287 b->buffer = (XMesaDrawable)b->backpixmap; 1288 } 1289 else { 1290 b->buffer = XIMAGE; 1291 } 1292 } 1293 else { 1294 /* Single Buffered */ 1295 b->buffer = b->frontbuffer; 1296 } 1297 1298 /* X11 graphics contexts */ 1299#ifdef XFree86Server 1300 b->gc = CreateScratchGC(v->display, window->depth); 1301#else 1302 b->gc = XCreateGC( v->display, window, 0, NULL ); 1303#endif 1304 XMesaSetFunction( v->display, b->gc, GXcopy ); 1305 1306 /* 1307 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1308 * Patch contributed by Michael Pichler May 15, 1995. 1309 */ 1310#ifdef XFree86Server 1311 b->cleargc = CreateScratchGC(v->display, window->depth); 1312 { 1313 CARD32 v[1]; 1314 v[0] = FALSE; 1315 dixChangeGC(NullClient, b->cleargc, GCGraphicsExposures, v, NULL); 1316 } 1317#else 1318 gcvalues.graphics_exposures = False; 1319 b->cleargc = XCreateGC( v->display, window, 1320 GCGraphicsExposures, &gcvalues); 1321#endif 1322 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1323 /* 1324 * Set fill style and tile pixmap once for all for HPCR stuff 1325 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1326 * Initialize whole stuff 1327 * Patch contributed by Jacques Leroy March 8, 1998. 1328 */ 1329 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1330 int i; 1331 for (i=0; i<16; i++) 1332 { 1333 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1334 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1335 } 1336 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1337 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1338 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1339 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1340 } 1341 1342 /* Initialize the row buffer XImage for use in write_color_span() */ 1343#ifdef XFree86Server 1344 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1345 (char *)MALLOC(MAX_WIDTH*4)); 1346#else 1347 b->rowimage = XCreateImage( v->display, 1348 v->visinfo->visual, 1349 v->visinfo->depth, 1350 ZPixmap, 0, /*format, offset*/ 1351 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1352 MAX_WIDTH, 1, /*width, height*/ 1353 32, /*bitmap_pad*/ 1354 0 /*bytes_per_line*/ ); 1355#endif 1356 } 1357 1358 return GL_TRUE; 1359} 1360 1361 1362 1363/* 1364 * Convert an RGBA color to a pixel value. 1365 */ 1366unsigned long 1367xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1368 GLuint pixelFormat) 1369{ 1370 switch (pixelFormat) { 1371 case PF_INDEX: 1372 return 0; 1373 case PF_TRUECOLOR: 1374 { 1375 unsigned long p; 1376 PACK_TRUECOLOR( p, r, g, b ); 1377 return p; 1378 } 1379 case PF_8A8B8G8R: 1380 return PACK_8A8B8G8R( r, g, b, a ); 1381 case PF_8R8G8B: 1382 /* fall through */ 1383 case PF_8R8G8B24: 1384 return PACK_8R8G8B( r, g, b ); 1385 case PF_5R6G5B: 1386 return PACK_5R6G5B( r, g, b ); 1387 case PF_DITHER: 1388 { 1389 DITHER_SETUP; 1390 return DITHER( 1, 0, r, g, b ); 1391 } 1392 case PF_1BIT: 1393 /* 382 = (3*255)/2 */ 1394 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1395 case PF_HPCR: 1396 return DITHER_HPCR(1, 1, r, g, b); 1397 case PF_LOOKUP: 1398 { 1399 LOOKUP_SETUP; 1400 return LOOKUP( r, g, b ); 1401 } 1402 case PF_GRAYSCALE: 1403 return GRAY_RGB( r, g, b ); 1404 case PF_TRUEDITHER: 1405 /* fall through */ 1406 case PF_DITHER_5R6G5B: 1407 { 1408 unsigned long p; 1409 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1410 return p; 1411 } 1412 default: 1413 gl_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1414 } 1415 return 0; 1416} 1417 1418 1419/**********************************************************************/ 1420/***** Public Functions *****/ 1421/**********************************************************************/ 1422 1423 1424/* 1425 * Create a new X/Mesa visual. 1426 * Input: display - X11 display 1427 * visinfo - an XVisualInfo pointer 1428 * rgb_flag - GL_TRUE = RGB mode, 1429 * GL_FALSE = color index mode 1430 * alpha_flag - alpha buffer requested? 1431 * db_flag - GL_TRUE = double-buffered, 1432 * GL_FALSE = single buffered 1433 * stereo_flag - stereo visual? 1434 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1435 * GL_FALSE = use an off-screen pixmap for back buffer 1436 * depth_size - requested bits/depth values, or zero 1437 * stencil_size - requested bits/stencil values, or zero 1438 * accum_red_size - requested bits/red accum values, or zero 1439 * accum_green_size - requested bits/green accum values, or zero 1440 * accum_blue_size - requested bits/blue accum values, or zero 1441 * accum_alpha_size - requested bits/alpha accum values, or zero 1442 * num_samples - number of samples/pixel if multisampling, or zero 1443 * level - visual level, usually 0 1444 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT 1445 * Return; a new XMesaVisual or 0 if error. 1446 */ 1447XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1448 XMesaVisualInfo visinfo, 1449 GLboolean rgb_flag, 1450 GLboolean alpha_flag, 1451 GLboolean db_flag, 1452 GLboolean stereo_flag, 1453 GLboolean ximage_flag, 1454 GLint depth_size, 1455 GLint stencil_size, 1456 GLint accum_red_size, 1457 GLint accum_green_size, 1458 GLint accum_blue_size, 1459 GLint accum_alpha_size, 1460 GLint num_samples, 1461 GLint level, 1462 GLint visualCaveat ) 1463{ 1464 char *gamma; 1465 XMesaVisual v; 1466 GLint red_bits, green_bits, blue_bits, alpha_bits; 1467 1468 /* For debugging only */ 1469 if (getenv("MESA_XSYNC")) { 1470 /* This makes debugging X easier. 1471 * In your debugger, set a breakpoint on _XError to stop when an 1472 * X protocol error is generated. 1473 */ 1474#ifdef XFree86Server 1475 /* NOT_NEEDED */ 1476#else 1477 XSynchronize( display, 1 ); 1478#endif 1479 } 1480 1481 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1482 if (!v) { 1483 return NULL; 1484 } 1485 1486 /* 1487 * In the X server, NULL is passed in for the display. It will have 1488 * to be set before using this visual. See XMesaSetVisualDisplay() 1489 * below. 1490 */ 1491 v->display = display; 1492 1493 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1494 * the struct but we may need some of the information contained in it 1495 * at a later time. 1496 */ 1497#ifdef XFree86Server 1498 v->visinfo = visinfo; 1499#else 1500 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1501 if(!v->visinfo) { 1502 FREE(v); 1503 return NULL; 1504 } 1505 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1506 1507 /* Save a copy of the pointer now so we can find this visual again 1508 * if we need to search for it in find_glx_visual(). 1509 */ 1510 v->vishandle = visinfo; 1511#endif 1512 1513#ifdef XFree86Server 1514 /* Initialize the depth of the screen */ 1515 { 1516 PixmapFormatRec *format; 1517 1518 for (format = screenInfo.formats; 1519 format->depth != display->rootDepth; 1520 format++) 1521 ; 1522 v->screen_depth = format->bitsPerPixel; 1523 } 1524#endif 1525 1526 /* check for MESA_GAMMA environment variable */ 1527 gamma = getenv("MESA_GAMMA"); 1528 if (gamma) { 1529 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1530 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1531 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1532 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1533 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1534 } 1535 else { 1536 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1537 } 1538 1539 v->ximage_flag = ximage_flag; 1540 v->level = level; 1541 v->VisualCaveat = visualCaveat; 1542 1543 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1544 1545 { 1546 int xclass; 1547 xclass = GET_VISUAL_CLASS(v); 1548 if (xclass==TrueColor || xclass==DirectColor) { 1549 red_bits = bitcount(GET_REDMASK(v)); 1550 green_bits = bitcount(GET_GREENMASK(v)); 1551 blue_bits = bitcount(GET_BLUEMASK(v)); 1552 alpha_bits = 0; 1553 } 1554 else { 1555 /* this is an approximation */ 1556 int depth; 1557 depth = GET_VISUAL_DEPTH(v); 1558 red_bits = depth / 3; 1559 depth -= red_bits; 1560 green_bits = depth / 2; 1561 depth -= green_bits; 1562 blue_bits = depth; 1563 alpha_bits = 0; 1564 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1565 } 1566 } 1567 1568 if (alpha_flag && alpha_bits == 0) 1569 alpha_bits = 8; 1570 1571 v->gl_visual = _mesa_create_visual( rgb_flag, db_flag, stereo_flag, 1572 red_bits, green_bits, 1573 blue_bits, alpha_bits, 1574 v->index_bits, 1575 depth_size, 1576 stencil_size, 1577 accum_red_size, accum_green_size, 1578 accum_blue_size, accum_alpha_size, 1579 0 ); 1580 if (!v->gl_visual) { 1581#ifndef XFree86Server 1582 FREE(v->visinfo); 1583#endif 1584 FREE(v); 1585 return NULL; 1586 } 1587 1588 return v; 1589} 1590 1591 1592void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1593{ 1594 v->display = dpy; 1595} 1596 1597 1598void XMesaDestroyVisual( XMesaVisual v ) 1599{ 1600 _mesa_destroy_visual( v->gl_visual ); 1601#ifndef XFree86Server 1602 FREE(v->visinfo); 1603#endif 1604 FREE(v); 1605} 1606 1607 1608 1609/* 1610 * Create a new XMesaContext. 1611 * Input: v - XMesaVisual 1612 * share_list - another XMesaContext with which to share display 1613 * lists or NULL if no sharing is wanted. 1614 * Return: an XMesaContext or NULL if error. 1615 */ 1616XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1617{ 1618 XMesaContext c; 1619 GLcontext *ctx; 1620 GLboolean direct = GL_TRUE; /* XXXX */ 1621 /* NOT_DONE: should this be GL_FALSE??? */ 1622 static GLboolean firstTime = GL_TRUE; 1623 1624 if (firstTime) { 1625 _glthread_INIT_MUTEX(_xmesa_lock); 1626 firstTime = GL_FALSE; 1627 } 1628 1629 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1630 if (!c) { 1631 return NULL; 1632 } 1633 1634 ctx = c->gl_ctx = _mesa_create_context( v->gl_visual, 1635 share_list ? share_list->gl_ctx : (GLcontext *) NULL, 1636 (void *) c, direct ); 1637 if (!c->gl_ctx) { 1638 FREE(c); 1639 return NULL; 1640 } 1641 1642 _mesa_enable_sw_extensions(ctx); 1643 1644 if (CHECK_BYTE_ORDER(v)) { 1645 c->swapbytes = GL_FALSE; 1646 } 1647 else { 1648 c->swapbytes = GL_TRUE; 1649 } 1650 1651 c->xm_visual = v; 1652 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1653 c->display = v->display; 1654 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1655 1656 ctx->Driver.UpdateState = xmesa_update_state; 1657 1658#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1659 c->driContextPriv = driContextPriv; 1660#endif 1661 1662 /* Set up some constant pointers: 1663 */ 1664 xmesa_init_pointers( ctx ); 1665 1666 /* Initialize the software rasterizer and helper modules. 1667 */ 1668 _swrast_CreateContext( ctx ); 1669 _ac_CreateContext( ctx ); 1670 _tnl_CreateContext( ctx ); 1671 _swsetup_CreateContext( ctx ); 1672 1673 xmesa_register_swrast_functions( ctx ); 1674 1675 /* Run the config file 1676 */ 1677 _mesa_context_initialize( ctx ); 1678 1679 1680 return c; 1681} 1682 1683 1684 1685 1686void XMesaDestroyContext( XMesaContext c ) 1687{ 1688#ifdef FX 1689 if (c->xm_buffer && c->xm_buffer->FXctx) 1690 fxMesaDestroyContext(c->xm_buffer->FXctx); 1691#endif 1692 if (c->gl_ctx) { 1693 _swsetup_DestroyContext( c->gl_ctx ); 1694 _swrast_DestroyContext( c->gl_ctx ); 1695 _mesa_destroy_context( c->gl_ctx ); 1696 } 1697 1698 /* Disassociate old buffer with this context */ 1699 if (c->xm_buffer) 1700 c->xm_buffer->xm_context = NULL; 1701 1702 /* Destroy any buffers which are using this context. If we don't 1703 * we may have dangling references. Hmm, maybe we should just 1704 * set the buffer's context pointer to NULL instead of deleting it? 1705 * Let's see if we get any bug reports... 1706 * This contributed by Doug Rabson <dfr@calcaphon.com> 1707 */ 1708 { 1709 XMesaBuffer b, next; 1710 for (b = XMesaBufferList; b; b = next) { 1711 next = b->Next; 1712 if (!b->pixmap_flag) { 1713#ifndef XFree86Server 1714 XSync(b->display, False); 1715#endif 1716 if (b->xm_context == c) { 1717 /* found a context created for this context */ 1718 XMesaDestroyBuffer( b ); 1719 } 1720 } 1721 } 1722 } 1723 1724 FREE( c ); 1725} 1726 1727 1728 1729/* 1730 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1731 * Create a new XMesaBuffer from an X window. 1732 * Input: v - the XMesaVisual 1733 * w - the window 1734 * c - the context 1735 * Return: new XMesaBuffer or NULL if error 1736 */ 1737XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1738 XMesaContext c ) 1739{ 1740#ifndef XFree86Server 1741 XWindowAttributes attr; 1742#endif 1743#ifdef FX 1744 char *fxEnvVar; 1745#endif 1746 int client = 0; 1747 1748 XMesaBuffer b = alloc_xmesa_buffer(); 1749 if (!b) { 1750 return NULL; 1751 } 1752 1753 (void) c; 1754 1755#ifdef XFree86Server 1756 client = CLIENT_ID(((XMesaDrawable)w)->id); 1757#endif 1758 1759 assert(v); 1760 1761#ifdef XFree86Server 1762 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1763#else 1764 XGetWindowAttributes( v->display, w, &attr ); 1765 1766 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1767#endif 1768 if (getenv("MESA_DEBUG")) { 1769 fprintf(stderr, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1770 } 1771 return NULL; 1772 } 1773 1774 b->xm_context = NULL; /* Associate no context with this buffer */ 1775 1776 b->xm_visual = v; 1777 b->pixmap_flag = GL_FALSE; 1778 b->display = v->display; 1779#ifdef XFree86Server 1780 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1781#else 1782 if (attr.colormap) { 1783 b->cmap = attr.colormap; 1784 } 1785 else { 1786 if (getenv("MESA_DEBUG")) { 1787 fprintf(stderr, "Window %u has no colormap!\n", (unsigned int) w); 1788 } 1789 /* this is weird, a window w/out a colormap!? */ 1790 /* OK, let's just allocate a new one and hope for the best */ 1791 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1792 } 1793#endif 1794 1795 /* determine back buffer implementation */ 1796 if (v->gl_visual->doubleBufferMode) { 1797 if (v->ximage_flag) { 1798 b->db_state = BACK_XIMAGE; 1799 } 1800 else { 1801 b->db_state = BACK_PIXMAP; 1802 } 1803 } 1804 else { 1805 b->db_state = 0; 1806 } 1807 1808 b->gl_buffer = _mesa_create_framebuffer( v->gl_visual, 1809 v->gl_visual->depthBits > 0, 1810 v->gl_visual->stencilBits > 0, 1811 v->gl_visual->accumRedBits > 0, 1812 v->gl_visual->alphaBits > 0 ); 1813 if (!b->gl_buffer) { 1814 free_xmesa_buffer(client, b); 1815 return NULL; 1816 } 1817 1818 if (!initialize_visual_and_buffer( client, v, b, v->gl_visual->rgbMode, 1819 (XMesaDrawable)w, b->cmap )) { 1820 _mesa_destroy_framebuffer( b->gl_buffer ); 1821 free_xmesa_buffer(client, b); 1822 return NULL; 1823 } 1824 1825#ifdef FX 1826 fxEnvVar = getenv("MESA_GLX_FX"); 1827 if (fxEnvVar) { 1828 if (fxEnvVar[0]!='d') { 1829 int attribs[100]; 1830 int numAttribs = 0; 1831 int hw; 1832 if (v->gl_visual->depthBits > 0) { 1833 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1834 attribs[numAttribs++] = 1; 1835 } 1836 if (v->gl_visual->doubleBufferMode) { 1837 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1838 } 1839 if (v->gl_visual->accumRedBits > 0) { 1840 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1841 attribs[numAttribs++] = v->gl_visual->accumRedBits; 1842 } 1843 if (v->gl_visual->stencilBits > 0) { 1844 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1845 attribs[numAttribs++] = v->gl_visual->stencilBits; 1846 } 1847 if (v->gl_visual->alphaBits > 0) { 1848 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1849 attribs[numAttribs++] = 1; 1850 } 1851 if (c->gl_ctx) { 1852#define FXMESA_SHARE_CONTEXT 990099 /* keep in sync with fxapi.c! */ 1853 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1854 attribs[numAttribs++] = (int) c->gl_ctx; 1855 } 1856 attribs[numAttribs++] = FXMESA_NONE; 1857 1858 if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) { 1859 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1860 if ((v->undithered_pf!=PF_INDEX) && (b->backimage)) { 1861 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1862 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1863 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1864 else 1865 b->FXwindowHack = GL_FALSE; 1866 } 1867 } 1868 else { 1869 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1870 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1871 GR_REFRESH_75Hz, attribs); 1872 else 1873 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1874 b->FXisHackUsable = GL_FALSE; 1875 b->FXwindowHack = GL_FALSE; 1876 } 1877 /* 1878 fprintf(stderr, 1879 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1880 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1881 */ 1882 } 1883 } 1884 else { 1885 fprintf(stderr,"WARNING: This Mesa Library includes the Glide driver but\n"); 1886 fprintf(stderr," you have not defined the MESA_GLX_FX env. var.\n"); 1887 fprintf(stderr," (check the README.3DFX file for more information).\n\n"); 1888 fprintf(stderr," you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1889 } 1890#endif 1891 1892#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1893 b->driDrawPriv = driDrawPriv; 1894#endif 1895 1896 return b; 1897} 1898 1899 1900XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1901{ 1902 return XMesaCreateWindowBuffer2( v, w, NULL ); 1903} 1904 1905 1906/* 1907 * Create a new XMesaBuffer from an X pixmap. 1908 * Input: v - the XMesaVisual 1909 * p - the pixmap 1910 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor 1911 * visual for the pixmap 1912 * Return: new XMesaBuffer or NULL if error 1913 */ 1914XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1915 XMesaPixmap p, XMesaColormap cmap ) 1916{ 1917 int client = 0; 1918 XMesaBuffer b = alloc_xmesa_buffer(); 1919 if (!b) { 1920 return NULL; 1921 } 1922 1923 1924#ifdef XFree86Server 1925 client = CLIENT_ID(((XMesaDrawable)p)->id); 1926#endif 1927 1928 assert(v); 1929 1930 b->xm_context = NULL; /* Associate no context with this buffer */ 1931 1932 b->xm_visual = v; 1933 b->pixmap_flag = GL_TRUE; 1934 b->display = v->display; 1935 b->cmap = cmap; 1936 1937 /* determine back buffer implementation */ 1938 if (v->gl_visual->doubleBufferMode) { 1939 if (v->ximage_flag) { 1940 b->db_state = BACK_XIMAGE; 1941 } 1942 else { 1943 b->db_state = BACK_PIXMAP; 1944 } 1945 } 1946 else { 1947 b->db_state = 0; 1948 } 1949 1950 b->gl_buffer = _mesa_create_framebuffer( v->gl_visual, 1951 v->gl_visual->depthBits > 0, 1952 v->gl_visual->stencilBits > 0, 1953 v->gl_visual->accumRedBits + 1954 v->gl_visual->accumGreenBits + 1955 v->gl_visual->accumBlueBits > 0, 1956 v->gl_visual->alphaBits > 0 ); 1957 if (!b->gl_buffer) { 1958 free_xmesa_buffer(client, b); 1959 return NULL; 1960 } 1961 1962 if (!initialize_visual_and_buffer(client, v, b, v->gl_visual->rgbMode, 1963 (XMesaDrawable)p, cmap)) { 1964 _mesa_destroy_framebuffer( b->gl_buffer ); 1965 free_xmesa_buffer(client, b); 1966 return NULL; 1967 } 1968 1969#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1970 b->driDrawPriv = driDrawPriv; 1971#endif 1972 1973 return b; 1974} 1975 1976 1977 1978/* 1979 * Deallocate an XMesaBuffer structure and all related info. 1980 */ 1981void XMesaDestroyBuffer( XMesaBuffer b ) 1982{ 1983 int client = 0; 1984 1985#ifdef XFree86Server 1986 if (b->frontbuffer) 1987 client = CLIENT_ID(b->frontbuffer->id); 1988#endif 1989 1990 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1991 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1992 1993 if (b->backimage) { 1994#if defined(USE_XSHM) && !defined(XFree86Server) 1995 if (b->shm) { 1996 XShmDetach( b->xm_visual->display, &b->shminfo ); 1997 XDestroyImage( b->backimage ); 1998 shmdt( b->shminfo.shmaddr ); 1999 } 2000 else 2001#endif 2002 XMesaDestroyImage( b->backimage ); 2003 } 2004 if (b->backpixmap) { 2005 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 2006 if (b->xm_visual->hpcr_clear_flag) { 2007 XMesaFreePixmap( b->xm_visual->display, 2008 b->xm_visual->hpcr_clear_pixmap ); 2009 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 2010 } 2011 } 2012 if (b->rowimage) { 2013 FREE( b->rowimage->data ); 2014 b->rowimage->data = NULL; 2015 XMesaDestroyImage( b->rowimage ); 2016 } 2017 2018 if (b->xm_context) 2019 b->xm_context->xm_buffer = NULL; 2020 2021 _mesa_destroy_framebuffer( b->gl_buffer ); 2022 free_xmesa_buffer(client, b); 2023} 2024 2025 2026 2027/* 2028 * Bind buffer b to context c and make c the current rendering context. 2029 */ 2030GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2031{ 2032 return XMesaMakeCurrent2( c, b, b ); 2033} 2034 2035 2036/* 2037 * Bind buffer b to context c and make c the current rendering context. 2038 */ 2039GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2040 XMesaBuffer readBuffer ) 2041{ 2042 if (c) { 2043 if (!drawBuffer || !readBuffer) 2044 return GL_FALSE; /* must specify buffers! */ 2045 2046#ifdef FX 2047 if (drawBuffer->FXctx) { 2048 fxMesaMakeCurrent(drawBuffer->FXctx); 2049 2050 /* Disassociate old buffer from this context */ 2051 if (c->xm_buffer) 2052 c->xm_buffer->xm_context = NULL; 2053 2054 /* Associate the context with this buffer */ 2055 drawBuffer->xm_context = c; 2056 2057 c->xm_buffer = drawBuffer; 2058 c->xm_read_buffer = readBuffer; 2059 c->use_read_buffer = (drawBuffer != readBuffer); 2060 2061 return GL_TRUE; 2062 } 2063#endif 2064 if (c->gl_ctx == _mesa_get_current_context() 2065 && c->xm_buffer == drawBuffer 2066 && c->xm_read_buffer == readBuffer 2067 && c->xm_buffer->wasCurrent) { 2068 /* same context and buffer, do nothing */ 2069 return GL_TRUE; 2070 } 2071 2072 /* Disassociate old buffer with this context */ 2073 if (c->xm_buffer) 2074 c->xm_buffer->xm_context = NULL; 2075 drawBuffer->xm_context = c; /* Associate the context with this buffer */ 2076 2077 c->xm_buffer = drawBuffer; 2078 c->xm_read_buffer = readBuffer; 2079 c->use_read_buffer = (drawBuffer != readBuffer); 2080 2081 _mesa_make_current2(c->gl_ctx, drawBuffer->gl_buffer, readBuffer->gl_buffer); 2082 2083 if (c->gl_ctx->Viewport.Width == 0) { 2084 /* initialize viewport to window size */ 2085 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2086 c->gl_ctx->Scissor.Width = drawBuffer->width; 2087 c->gl_ctx->Scissor.Height = drawBuffer->height; 2088 } 2089 2090 if (c->xm_visual->gl_visual->rgbMode) { 2091 /* 2092 * Must recompute and set these pixel values because colormap 2093 * can be different for different windows. 2094 */ 2095 c->clearpixel = xmesa_color_to_pixel( c, 2096 c->clearcolor[0], 2097 c->clearcolor[1], 2098 c->clearcolor[2], 2099 c->clearcolor[3], 2100 c->xm_visual->undithered_pf); 2101 XMesaSetForeground(c->display, c->xm_buffer->cleargc, c->clearpixel); 2102 } 2103 2104 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2105 c->xm_buffer->wasCurrent = GL_TRUE; 2106 } 2107 else { 2108 /* Detach */ 2109 _mesa_make_current2( NULL, NULL, NULL ); 2110 } 2111 return GL_TRUE; 2112} 2113 2114 2115/* 2116 * Unbind the context c from its buffer. 2117 */ 2118GLboolean XMesaUnbindContext( XMesaContext c ) 2119{ 2120 /* A no-op for XFree86 integration purposes */ 2121 return GL_TRUE; 2122} 2123 2124 2125XMesaContext XMesaGetCurrentContext( void ) 2126{ 2127 GET_CURRENT_CONTEXT(ctx); 2128 if (ctx) { 2129 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2130 return xmesa; 2131 } 2132 else { 2133 return 0; 2134 } 2135} 2136 2137 2138XMesaBuffer XMesaGetCurrentBuffer( void ) 2139{ 2140 GET_CURRENT_CONTEXT(ctx); 2141 if (ctx) { 2142 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2143 return xmesa->xm_buffer; 2144 } 2145 else { 2146 return 0; 2147 } 2148} 2149 2150 2151/* New in Mesa 3.1 */ 2152XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2153{ 2154 GET_CURRENT_CONTEXT(ctx); 2155 if (ctx) { 2156 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2157 return xmesa->xm_buffer; 2158 } 2159 else { 2160 return 0; 2161 } 2162} 2163 2164 2165GLboolean XMesaForceCurrent(XMesaContext c) 2166{ 2167 if (c) { 2168 if (c->gl_ctx != _mesa_get_current_context()) { 2169 _mesa_make_current(c->gl_ctx, c->xm_buffer->gl_buffer); 2170 } 2171 } 2172 else { 2173 _mesa_make_current(NULL, NULL); 2174 } 2175 return GL_TRUE; 2176} 2177 2178 2179GLboolean XMesaLoseCurrent(XMesaContext c) 2180{ 2181 (void) c; 2182 _mesa_make_current(NULL, NULL); 2183 return GL_TRUE; 2184} 2185 2186 2187/* 2188 * Switch 3Dfx support hack between window and full-screen mode. 2189 */ 2190GLboolean XMesaSetFXmode( GLint mode ) 2191{ 2192#ifdef FX 2193 const char *fx = getenv("MESA_GLX_FX"); 2194 if (fx && fx[0] != 'd') { 2195 GET_CURRENT_CONTEXT(ctx); 2196 GrHwConfiguration hw; 2197 if (!FX_grSstQueryHardware(&hw)) { 2198 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2199 return GL_FALSE; 2200 } 2201 if (hw.num_sst < 1) { 2202 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2203 return GL_FALSE; 2204 } 2205 if (ctx) { 2206 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2207 if (mode == XMESA_FX_WINDOW) { 2208 if (xmesa->xm_buffer->FXisHackUsable) { 2209 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2210 xmesa->xm_buffer->FXwindowHack = GL_TRUE; 2211 return GL_TRUE; 2212 } 2213 } 2214 else if (mode == XMESA_FX_FULLSCREEN) { 2215 FX_grSstControl(GR_CONTROL_ACTIVATE); 2216 xmesa->xm_buffer->FXwindowHack = GL_FALSE; 2217 return GL_TRUE; 2218 } 2219 else { 2220 /* Error: Bad mode value */ 2221 } 2222 } 2223 } 2224 /*fprintf(stderr, "fallthrough\n");*/ 2225#else 2226 (void) mode; 2227#endif 2228 return GL_FALSE; 2229} 2230 2231 2232 2233#ifdef FX 2234/* 2235 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2236 */ 2237static void FXgetImage( XMesaBuffer b ) 2238{ 2239 static unsigned short pixbuf[MAX_WIDTH]; 2240 int x, y; 2241 XMesaWindow root; 2242 unsigned int bw, depth, width, height; 2243 XMesaContext xmesa = (XMesaContext) b->xm_context->gl_ctx->DriverCtx; 2244 2245 assert(xmesa->xm_buffer->FXctx); 2246 2247#ifdef XFree86Server 2248 x = b->frontbuffer->x; 2249 y = b->frontbuffer->y; 2250 width = b->frontbuffer->width; 2251 height = b->frontbuffer->height; 2252 depth = b->frontbuffer->depth; 2253#else 2254 XGetGeometry( xmesa->xm_visual->display, b->frontbuffer, 2255 &root, &x, &y, &width, &height, &bw, &depth); 2256#endif 2257 if (b->width != width || b->height != height) { 2258 b->width = MIN2((int)width, xmesa->xm_buffer->FXctx->width); 2259 b->height = MIN2((int)height, xmesa->xm_buffer->FXctx->height); 2260 if (b->width & 1) 2261 b->width--; /* prevent odd width */ 2262 xmesa_alloc_back_buffer( b ); 2263 } 2264 2265 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2266 if (xmesa->xm_visual->undithered_pf==PF_5R6G5B) { 2267 /* Special case: 16bpp RGB */ 2268 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2269 0, xmesa->xm_buffer->FXctx->height - b->height, /*pos*/ 2270 b->width, b->height, /* size */ 2271 b->width * sizeof(GLushort), /* stride */ 2272 b->backimage->data); /* dest buffer */ 2273 } 2274 else if (xmesa->xm_visual->dithered_pf==PF_DITHER 2275 && GET_VISUAL_DEPTH(xmesa->xm_visual)==8) { 2276 /* Special case: 8bpp RGB */ 2277 for (y=0;y<b->height;y++) { 2278 GLubyte *ptr = (GLubyte*) xmesa->xm_buffer->backimage->data 2279 + xmesa->xm_buffer->backimage->bytes_per_line * y; 2280 XDITHER_SETUP(y); 2281 2282 /* read row from 3Dfx frame buffer */ 2283 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2284 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2285 b->width, 1, 2286 0, 2287 pixbuf ); 2288 2289 /* write to XImage back buffer */ 2290 for (x=0;x<b->width;x++) { 2291 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2292 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2293 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2294 *ptr++ = XDITHER( x, r, g, b); 2295 } 2296 } 2297 } 2298 else { 2299 /* General case: slow! */ 2300 for (y=0;y<b->height;y++) { 2301 /* read row from 3Dfx frame buffer */ 2302 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2303 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2304 b->width, 1, 2305 0, 2306 pixbuf ); 2307 2308 /* write to XImage back buffer */ 2309 for (x=0;x<b->width;x++) { 2310 XMesaPutPixel(b->backimage,x,y, 2311 xmesa_color_to_pixel(xmesa, 2312 (pixbuf[x] & 0xf800) >> 8, 2313 (pixbuf[x] & 0x07e0) >> 3, 2314 (pixbuf[x] & 0x001f) << 3, 2315 0xff, xmesa->pixelformat)); 2316 } 2317 } 2318 } 2319 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2320} 2321#endif 2322 2323 2324/* 2325 * Copy the back buffer to the front buffer. If there's no back buffer 2326 * this is a no-op. 2327 */ 2328void XMesaSwapBuffers( XMesaBuffer b ) 2329{ 2330 GET_CURRENT_CONTEXT(ctx); 2331 2332 /* If we're swapping the buffer associated with the current context 2333 * we have to flush any pending rendering commands first. 2334 */ 2335 if (b->xm_context && b->xm_context->gl_ctx == ctx) 2336 _mesa_swapbuffers(ctx); 2337 2338 if (b->db_state) { 2339#ifdef FX 2340 if (b->FXctx) { 2341 fxMesaSwapBuffers(); 2342 2343 if (b->FXwindowHack) 2344 FXgetImage(b); 2345 else 2346 return; 2347 } 2348#endif 2349 if (b->backimage) { 2350 /* Copy Ximage from host's memory to server's window */ 2351#if defined(USE_XSHM) && !defined(XFree86Server) 2352 if (b->shm) { 2353 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2354 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2355 b->cleargc, 2356 b->backimage, 0, 0, 2357 0, 0, b->width, b->height, False ); 2358 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2359 } 2360 else 2361#endif 2362 { 2363#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 2364 XMesaDriSwapBuffers( b ); 2365#else 2366 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2367 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2368 b->cleargc, 2369 b->backimage, 0, 0, 2370 0, 0, b->width, b->height ); 2371 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2372#endif 2373 } 2374 } 2375 else { 2376 /* Copy pixmap to window on server */ 2377 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2378 XMesaCopyArea( b->xm_visual->display, 2379 b->backpixmap, /* source drawable */ 2380 b->frontbuffer, /* dest. drawable */ 2381 b->cleargc, 2382 0, 0, b->width, b->height, /* source region */ 2383 0, 0 /* dest region */ 2384 ); 2385 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2386 } 2387 } 2388#if !defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 2389 XSync( b->xm_visual->display, False ); 2390#endif 2391} 2392 2393 2394 2395/* 2396 * Copy sub-region of back buffer to front buffer 2397 */ 2398void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2399{ 2400 GET_CURRENT_CONTEXT(ctx); 2401 2402 /* If we're swapping the buffer associated with the current context 2403 * we have to flush any pending rendering commands first. 2404 */ 2405 if (b->xm_context->gl_ctx == ctx) 2406 _mesa_swapbuffers(ctx); 2407 2408 if (b->db_state) { 2409 int yTop = b->height - y - height; 2410#ifdef FX 2411 if (b->FXctx) { 2412 fxMesaSwapBuffers(); 2413 if (b->FXwindowHack) 2414 FXgetImage(b); 2415 else 2416 return; 2417 } 2418#endif 2419 if (b->backimage) { 2420 /* Copy Ximage from host's memory to server's window */ 2421#if defined(USE_XSHM) && !defined(XFree86Server) 2422 if (b->shm) { 2423 /* XXX assuming width and height aren't too large! */ 2424 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2425 b->cleargc, 2426 b->backimage, x, yTop, 2427 x, yTop, width, height, False ); 2428 /* wait for finished event??? */ 2429 } 2430 else 2431#endif 2432 { 2433 /* XXX assuming width and height aren't too large! */ 2434 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2435 b->cleargc, 2436 b->backimage, x, yTop, 2437 x, yTop, width, height ); 2438 } 2439 } 2440 else { 2441 /* Copy pixmap to window on server */ 2442 XMesaCopyArea( b->xm_visual->display, 2443 b->backpixmap, /* source drawable */ 2444 b->frontbuffer, /* dest. drawable */ 2445 b->cleargc, 2446 x, yTop, width, height, /* source region */ 2447 x, yTop /* dest region */ 2448 ); 2449 } 2450 } 2451} 2452 2453 2454/* 2455 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2456 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2457 * back buffer directly. 2458 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2459 * ximage - pointer to back buffer's XImage, or NULL 2460 * Return: GL_TRUE = context is double buffered 2461 * GL_FALSE = context is single buffered 2462 */ 2463GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2464 XMesaPixmap *pixmap, 2465 XMesaImage **ximage ) 2466{ 2467 if (b->db_state) { 2468 if (pixmap) *pixmap = b->backpixmap; 2469 if (ximage) *ximage = b->backimage; 2470 return GL_TRUE; 2471 } 2472 else { 2473 *pixmap = 0; 2474 *ximage = NULL; 2475 return GL_FALSE; 2476 } 2477} 2478 2479 2480/* 2481 * Return the depth buffer associated with an XMesaBuffer. 2482 * Input: b - the XMesa buffer handle 2483 * Output: width, height - size of buffer in pixels 2484 * bytesPerValue - bytes per depth value (2 or 4) 2485 * buffer - pointer to depth buffer values 2486 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2487 */ 2488GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2489 GLint *bytesPerValue, void **buffer ) 2490{ 2491 if ((!b->gl_buffer) || (!b->gl_buffer->DepthBuffer)) { 2492 *width = 0; 2493 *height = 0; 2494 *bytesPerValue = 0; 2495 *buffer = 0; 2496 return GL_FALSE; 2497 } 2498 else { 2499 *width = b->gl_buffer->Width; 2500 *height = b->gl_buffer->Height; 2501 *bytesPerValue = sizeof(GLdepth); 2502 *buffer = b->gl_buffer->DepthBuffer; 2503 return GL_TRUE; 2504 } 2505} 2506 2507 2508void XMesaFlush( XMesaContext c ) 2509{ 2510 if (c && c->xm_visual) { 2511#ifdef XFree86Server 2512 /* NOT_NEEDED */ 2513#else 2514 XSync( c->xm_visual->display, False ); 2515#endif 2516 } 2517} 2518 2519 2520 2521const char *XMesaGetString( XMesaContext c, int name ) 2522{ 2523 (void) c; 2524 if (name==XMESA_VERSION) { 2525 return "3.1"; 2526 } 2527 else if (name==XMESA_EXTENSIONS) { 2528 return ""; 2529 } 2530 else { 2531 return NULL; 2532 } 2533} 2534 2535 2536 2537XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2538{ 2539 XMesaBuffer b; 2540 for (b=XMesaBufferList; b; b=b->Next) { 2541 if (b->frontbuffer==d && b->display==dpy) { 2542 return b; 2543 } 2544 } 2545 return NULL; 2546} 2547 2548 2549 2550/* 2551 * Look for XMesaBuffers whose X window has been destroyed. 2552 * Deallocate any such XMesaBuffers. 2553 */ 2554void XMesaGarbageCollect( void ) 2555{ 2556 XMesaBuffer b, next; 2557 for (b=XMesaBufferList; b; b=next) { 2558 next = b->Next; 2559 if (!b->pixmap_flag) { 2560#ifdef XFree86Server 2561 /* NOT_NEEDED */ 2562#else 2563 XSync(b->display, False); 2564 if (!window_exists( b->display, b->frontbuffer )) { 2565 /* found a dead window, free the ancillary info */ 2566 XMesaDestroyBuffer( b ); 2567 } 2568#endif 2569 } 2570 } 2571} 2572 2573 2574void XMesaReset( void ) 2575{ 2576 while (XMesaBufferList) 2577 XMesaDestroyBuffer(XMesaBufferList); 2578 2579 XMesaBufferList = NULL; 2580} 2581 2582 2583unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2584 GLfloat red, GLfloat green, 2585 GLfloat blue, GLfloat alpha ) 2586{ 2587 GLint r = (GLint) (red * 255.0F); 2588 GLint g = (GLint) (green * 255.0F); 2589 GLint b = (GLint) (blue * 255.0F); 2590 GLint a = (GLint) (alpha * 255.0F); 2591 2592 switch (xmesa->pixelformat) { 2593 case PF_INDEX: 2594 return 0; 2595 case PF_TRUECOLOR: 2596 { 2597 unsigned long p; 2598 PACK_TRUECOLOR( p, r, g, b ); 2599 return p; 2600 } 2601 case PF_8A8B8G8R: 2602 return PACK_8A8B8G8R( r, g, b, a ); 2603 case PF_8R8G8B: 2604 return PACK_8R8G8B( r, g, b ); 2605 case PF_5R6G5B: 2606 return PACK_5R6G5B( r, g, b ); 2607 case PF_DITHER: 2608 { 2609 DITHER_SETUP; 2610 return DITHER( x, y, r, g, b ); 2611 } 2612 case PF_1BIT: 2613 /* 382 = (3*255)/2 */ 2614 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2615 case PF_HPCR: 2616 return DITHER_HPCR(x, y, r, g, b); 2617 case PF_LOOKUP: 2618 { 2619 LOOKUP_SETUP; 2620 return LOOKUP( r, g, b ); 2621 } 2622 case PF_GRAYSCALE: 2623 return GRAY_RGB( r, g, b ); 2624 case PF_DITHER_5R6G5B: 2625 /* fall through */ 2626 case PF_TRUEDITHER: 2627 { 2628 unsigned long p; 2629 PACK_TRUEDITHER(p, x, y, r, g, b); 2630 return p; 2631 } 2632 default: 2633 gl_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2634 } 2635 return 0; 2636} 2637 2638 2639