xm_api.c revision a078d75a27b99252ede6520e24b145106ab98aa2
1/* $Id: xm_api.c,v 1.36 2002/05/27 17:06:59 brianp Exp $ */ 2 3/* 4 * Mesa 3-D graphics library 5 * Version: 4.0.2 6 * 7 * Copyright (C) 1999-2002 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/* $XFree86: xc/extras/Mesa/src/X/xm_api.c,v 1.2 2002/02/26 23:37:31 tsi Exp $ */ 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 "mmath.h" 75#include "mtypes.h" 76#ifdef HAVE_CONFIG_H 77#include "conf.h" 78#endif 79#include "macros.h" 80#include "texformat.h" 81#include "texstore.h" 82#include "swrast/swrast.h" 83#include "swrast_setup/swrast_setup.h" 84#include "array_cache/acache.h" 85#include "tnl/tnl.h" 86 87#ifndef GLX_NONE_EXT 88#define GLX_NONE_EXT 0x8000 89#endif 90 91 92/* 93 * Global X driver lock 94 */ 95_glthread_Mutex _xmesa_lock; 96 97 98 99/* 100 * Lookup tables for HPCR pixel format: 101 */ 102static short hpcr_rgbTbl[3][256] = { 103{ 104 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 105 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 106 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 107 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 108 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 109 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 110 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 111 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 113128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 114144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 115160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 116176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 117192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 118208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 119224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 120}, 121{ 122 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 123 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 124 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 125 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 126 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 127 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 128 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 129 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 130112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 131128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 132144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 133160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 134176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 135192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 136208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 137224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 138}, 139{ 140 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 141 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 142 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 143 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 144 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 145 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 146 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 147 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 148 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 149112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 150128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 151144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 152160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 153176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 154192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 155208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 156} 157}; 158 159 160 161/**********************************************************************/ 162/***** X Utility Functions *****/ 163/**********************************************************************/ 164 165 166/* 167 * X/Mesa error reporting function: 168 */ 169static void error( const char *msg ) 170{ 171 (void)DitherValues; /* Muffle compiler */ 172 173 if (getenv("MESA_DEBUG")) 174 fprintf( stderr, "X/Mesa error: %s\n", msg ); 175} 176 177 178/* 179 * Return the host's byte order as LSBFirst or MSBFirst ala X. 180 */ 181#ifndef XFree86Server 182static int host_byte_order( void ) 183{ 184 int i = 1; 185 char *cptr = (char *) &i; 186 return (*cptr==1) ? LSBFirst : MSBFirst; 187} 188#endif 189 190 191/* 192 * Error handling. 193 */ 194#ifndef XFree86Server 195static int mesaXErrorFlag = 0; 196 197static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 198{ 199 (void) dpy; 200 (void) event; 201 mesaXErrorFlag = 1; 202 return 0; 203} 204#endif 205 206 207/* 208 * Check if the X Shared Memory extension is available. 209 * Return: 0 = not available 210 * 1 = shared XImage support available 211 * 2 = shared Pixmap support available also 212 */ 213#ifndef XFree86Server 214static int check_for_xshm( XMesaDisplay *display ) 215{ 216#ifdef USE_XSHM 217 int major, minor, ignore; 218 Bool pixmaps; 219 220 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 221 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 222 return (pixmaps==True) ? 2 : 1; 223 } 224 else { 225 return 0; 226 } 227 } 228 else { 229 return 0; 230 } 231#else 232 /* Can't compile XSHM support */ 233 return 0; 234#endif 235} 236#endif 237 238 239/* 240 * Return the width and height of the given drawable. 241 */ 242static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 243 unsigned int *width, unsigned int *height) 244{ 245#ifdef XFree86Server 246 (void) dpy; 247 *width = d->width; 248 *height = d->height; 249#else 250 Window root; 251 int x, y; 252 unsigned int bw, depth; 253 254 _glthread_LOCK_MUTEX(_xmesa_lock); 255 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 256 _glthread_UNLOCK_MUTEX(_xmesa_lock); 257#endif 258} 259 260 261/* 262 * Apply gamma correction to an intensity value in [0..max]. Return the 263 * new intensity value. 264 */ 265static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 266{ 267 if (gamma == 1.0) { 268 return value; 269 } 270 else { 271 double x = (double) value / (double) max; 272 return IROUND_POS((GLfloat) max * pow(x, 1.0F/gamma)); 273 } 274} 275 276 277 278/* 279 * Return the true number of bits per pixel for XImages. 280 * For example, if we request a 24-bit deep visual we may actually need/get 281 * 32bpp XImages. This function returns the appropriate bpp. 282 * Input: dpy - the X display 283 * visinfo - desribes the visual to be used for XImages 284 * Return: true number of bits per pixel for XImages 285 */ 286#ifdef XFree86Server 287 288static int bits_per_pixel( XMesaVisual xmv ) 289{ 290 XMesaVisualInfo visinfo = xmv->visinfo; 291 const int depth = visinfo->nplanes; 292 int i; 293 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 294 if (screenInfo.formats[i].depth == depth) 295 return screenInfo.formats[i].bitsPerPixel; 296 } 297 return depth; /* should never get here, but this should be safe */ 298} 299 300#else 301 302static int bits_per_pixel( XMesaVisual xmv ) 303{ 304 XMesaDisplay *dpy = xmv->display; 305 XMesaVisualInfo visinfo = xmv->visinfo; 306 XMesaImage *img; 307 int bitsPerPixel; 308 /* Create a temporary XImage */ 309 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 310 ZPixmap, 0, /*format, offset*/ 311 (char*) MALLOC(8), /*data*/ 312 1, 1, /*width, height*/ 313 32, /*bitmap_pad*/ 314 0 /*bytes_per_line*/ 315 ); 316 assert(img); 317 /* grab the bits/pixel value */ 318 bitsPerPixel = img->bits_per_pixel; 319 /* free the XImage */ 320 FREE( img->data ); 321 img->data = NULL; 322 XMesaDestroyImage( img ); 323 return bitsPerPixel; 324} 325#endif 326 327 328 329/* 330 * Determine if a given X window ID is valid (window exists). 331 * Do this by calling XGetWindowAttributes() for the window and 332 * checking if we catch an X error. 333 * Input: dpy - the display 334 * win - the window to check for existance 335 * Return: GL_TRUE - window exists 336 * GL_FALSE - window doesn't exist 337 */ 338#ifndef XFree86Server 339static GLboolean WindowExistsFlag; 340 341static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 342{ 343 (void) dpy; 344 if (xerr->error_code == BadWindow) { 345 WindowExistsFlag = GL_FALSE; 346 } 347 return 0; 348} 349 350static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 351{ 352 XWindowAttributes wa; 353 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 354 WindowExistsFlag = GL_TRUE; 355 old_handler = XSetErrorHandler(window_exists_err_handler); 356 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 357 XSetErrorHandler(old_handler); 358 return WindowExistsFlag; 359} 360#endif 361 362 363 364/**********************************************************************/ 365/***** Linked list of XMesaBuffers *****/ 366/**********************************************************************/ 367 368static XMesaBuffer XMesaBufferList = NULL; 369 370 371/* Allocate a new XMesaBuffer, add to linked list */ 372static XMesaBuffer alloc_xmesa_buffer(void) 373{ 374 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 375 if (b) { 376 b->Next = XMesaBufferList; 377 XMesaBufferList = b; 378 } 379 return b; 380} 381 382 383/* 384 * Find an XMesaBuffer by matching X display and colormap but NOT matching 385 * the notThis buffer. 386 */ 387static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 388 XMesaColormap cmap, 389 XMesaBuffer notThis) 390{ 391 XMesaBuffer b; 392 for (b=XMesaBufferList; b; b=b->Next) { 393 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 394 return b; 395 } 396 } 397 return NULL; 398} 399 400 401/* 402 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 403 * entries. 404 */ 405static void free_xmesa_buffer(int client, XMesaBuffer buffer) 406{ 407 XMesaBuffer prev = NULL, b; 408 (void) client; 409 for (b=XMesaBufferList; b; b=b->Next) { 410 if (b==buffer) { 411 /* unlink bufer from list */ 412 if (prev) 413 prev->Next = buffer->Next; 414 else 415 XMesaBufferList = buffer->Next; 416 /* Check to free X colors */ 417 if (buffer->num_alloced>0) { 418 /* If no other buffer uses this X colormap then free the colors. */ 419 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 420#ifdef XFree86Server 421 (void)FreeColors(buffer->cmap, client, 422 buffer->num_alloced, buffer->alloced_colors, 423 0); 424#else 425 XFreeColors(buffer->display, buffer->cmap, 426 buffer->alloced_colors, buffer->num_alloced, 0); 427#endif 428 } 429 } 430 431 _mesa_free_framebuffer_data(&buffer->mesa_buffer); 432 FREE(buffer); 433 434 return; 435 } 436 /* continue search */ 437 prev = b; 438 } 439 /* buffer not found in XMesaBufferList */ 440 _mesa_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 441} 442 443 444/* Copy X color table stuff from one XMesaBuffer to another. */ 445static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 446{ 447 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 448 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 449 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 450 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 451 dst->num_alloced = src->num_alloced; 452 MEMCPY(dst->alloced_colors, src->alloced_colors, 453 sizeof(src->alloced_colors)); 454} 455 456 457 458/**********************************************************************/ 459/***** Misc Private Functions *****/ 460/**********************************************************************/ 461 462 463/* 464 * Return number of bits set in n. 465 */ 466static int bitcount( unsigned long n ) 467{ 468 int bits; 469 for (bits=0; n>0; n=n>>1) { 470 if (n&1) { 471 bits++; 472 } 473 } 474 return bits; 475} 476 477 478 479/* 480 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 481 * Return: GL_TRUE if success, GL_FALSE if error 482 */ 483#ifndef XFree86Server 484static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 485{ 486#ifdef USE_XSHM 487 /* 488 * We have to do a _lot_ of error checking here to be sure we can 489 * really use the XSHM extension. It seems different servers trigger 490 * errors at different points if the extension won't work. Therefore 491 * we have to be very careful... 492 */ 493 GC gc; 494 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 495 496 b->backimage = XShmCreateImage( b->xm_visual->display, 497 b->xm_visual->visinfo->visual, 498 b->xm_visual->visinfo->depth, 499 ZPixmap, NULL, &b->shminfo, 500 b->width, b->height ); 501 if (b->backimage == NULL) { 502 error("alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 503 b->shm = 0; 504 return GL_FALSE; 505 } 506 507 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 508 * b->backimage->height, IPC_CREAT|0777 ); 509 if (b->shminfo.shmid < 0) { 510 if (getenv("MESA_DEBUG")) 511 perror("alloc_back_buffer"); 512 XDestroyImage( b->backimage ); 513 b->backimage = NULL; 514 error("alloc_back_buffer: Shared memory error (shmget), disabling."); 515 b->shm = 0; 516 return GL_FALSE; 517 } 518 519 b->shminfo.shmaddr = b->backimage->data 520 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 521 if (b->shminfo.shmaddr == (char *) -1) { 522 if (getenv("MESA_DEBUG")) 523 perror("alloc_back_buffer"); 524 XDestroyImage( b->backimage ); 525 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 526 b->backimage = NULL; 527 error("alloc_back_buffer: Shared memory error (shmat), disabling."); 528 b->shm = 0; 529 return GL_FALSE; 530 } 531 532 b->shminfo.readOnly = False; 533 mesaXErrorFlag = 0; 534 old_handler = XSetErrorHandler( mesaHandleXError ); 535 /* This may trigger the X protocol error we're ready to catch: */ 536 XShmAttach( b->xm_visual->display, &b->shminfo ); 537 XSync( b->xm_visual->display, False ); 538 539 if (mesaXErrorFlag) { 540 /* we are on a remote display, this error is normal, don't print it */ 541 XFlush( b->xm_visual->display ); 542 mesaXErrorFlag = 0; 543 XDestroyImage( b->backimage ); 544 shmdt( b->shminfo.shmaddr ); 545 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 546 b->backimage = NULL; 547 b->shm = 0; 548 (void) XSetErrorHandler( old_handler ); 549 return GL_FALSE; 550 } 551 552 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 553 554 /* Finally, try an XShmPutImage to be really sure the extension works */ 555 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 556 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 557 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 558 XSync( b->xm_visual->display, False ); 559 XFreeGC( b->xm_visual->display, gc ); 560 (void) XSetErrorHandler( old_handler ); 561 if (mesaXErrorFlag) { 562 XFlush( b->xm_visual->display ); 563 mesaXErrorFlag = 0; 564 XDestroyImage( b->backimage ); 565 shmdt( b->shminfo.shmaddr ); 566 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 567 b->backimage = NULL; 568 b->shm = 0; 569 return GL_FALSE; 570 } 571 572 if (b->backimage) { 573 int height = b->backimage->height; 574 /* Needed by PIXELADDR1 macro */ 575 b->ximage_width1 = b->backimage->bytes_per_line; 576 b->ximage_origin1 = (GLubyte *) b->backimage->data 577 + b->ximage_width1 * (height-1); 578 /* Needed by PIXELADDR2 macro */ 579 b->ximage_width2 = b->backimage->bytes_per_line / 2; 580 b->ximage_origin2 = (GLushort *) b->backimage->data 581 + b->ximage_width2 * (height-1); 582 /* Needed by PIXELADDR3 macro */ 583 b->ximage_width3 = b->backimage->bytes_per_line; 584 b->ximage_origin3 = (GLubyte *) b->backimage->data 585 + b->ximage_width3 * (height-1); 586 /* Needed by PIXELADDR4 macro */ 587 b->ximage_width4 = b->backimage->width; 588 b->ximage_origin4 = (GLuint *) b->backimage->data 589 + b->ximage_width4 * (height-1); 590 } 591 592 return GL_TRUE; 593#else 594 /* Can't compile XSHM support */ 595 return GL_FALSE; 596#endif 597} 598#endif 599 600 601 602/* 603 * Setup an off-screen pixmap or Ximage to use as the back buffer. 604 * Input: b - the X/Mesa buffer 605 */ 606void xmesa_alloc_back_buffer( XMesaBuffer b ) 607{ 608 if (b->db_state==BACK_XIMAGE) { 609 /* Deallocate the old backimage, if any */ 610 if (b->backimage) { 611#if defined(USE_XSHM) && !defined(XFree86Server) 612 if (b->shm) { 613 XShmDetach( b->xm_visual->display, &b->shminfo ); 614 XDestroyImage( b->backimage ); 615 shmdt( b->shminfo.shmaddr ); 616 } 617 else 618#endif 619 XMesaDestroyImage( b->backimage ); 620 b->backimage = NULL; 621 } 622 623 /* Allocate new back buffer */ 624#ifdef XFree86Server 625 { 626 /* Allocate a regular XImage for the back buffer. */ 627 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 628 b->width, b->height, NULL); 629#else 630 if (b->shm==0 631 || alloc_shm_back_buffer(b)==GL_FALSE 632 ) { 633 /* Allocate a regular XImage for the back buffer. */ 634 b->backimage = XCreateImage( b->xm_visual->display, 635 b->xm_visual->visinfo->visual, 636 GET_VISUAL_DEPTH(b->xm_visual), 637 ZPixmap, 0, /* format, offset */ 638 NULL, b->width, b->height, 639 8, 0 ); /* pad, bytes_per_line */ 640#endif 641 if (!b->backimage) { 642 error("alloc_back_buffer: XCreateImage failed."); 643 } 644 b->backimage->data = (char *) MALLOC( b->backimage->height 645 * b->backimage->bytes_per_line ); 646 if (!b->backimage->data) { 647 error("alloc_back_buffer: MALLOC failed."); 648 XMesaDestroyImage( b->backimage ); 649 b->backimage = NULL; 650 } 651 } 652 b->backpixmap = None; 653 } 654 else if (b->db_state==BACK_PIXMAP) { 655 XMesaPixmap old_pixmap = b->backpixmap; 656 /* Free the old back pixmap */ 657 if (b->backpixmap) { 658 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 659 } 660 /* Allocate new back pixmap */ 661 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 662 b->width, b->height, 663 GET_VISUAL_DEPTH(b->xm_visual) ); 664 b->backimage = NULL; 665 /* update other references to backpixmap */ 666 if (b->buffer==(XMesaDrawable)old_pixmap) { 667 b->buffer = (XMesaDrawable)b->backpixmap; 668 } 669 } 670} 671 672 673 674/* 675 * A replacement for XAllocColor. This function should never 676 * fail to allocate a color. When XAllocColor fails, we return 677 * the nearest matching color. If we have to allocate many colors 678 * this function isn't too efficient; the XQueryColors() could be 679 * done just once. 680 * Written by Michael Pichler, Brian Paul, Mark Kilgard 681 * Input: dpy - X display 682 * cmap - X colormap 683 * cmapSize - size of colormap 684 * In/Out: color - the XColor struct 685 * Output: exact - 1=exact color match, 0=closest match 686 * alloced - 1=XAlloc worked, 0=XAlloc failed 687 */ 688static void 689noFaultXAllocColor( int client, 690 XMesaDisplay *dpy, 691 XMesaColormap cmap, 692 int cmapSize, 693 XMesaColor *color, 694 int *exact, int *alloced ) 695{ 696#ifdef XFree86Server 697 Pixel *ppixIn; 698 xrgb *ctable; 699#else 700 /* we'll try to cache ctable for better remote display performance */ 701 static Display *prevDisplay = NULL; 702 static XMesaColormap prevCmap = 0; 703 static int prevCmapSize = 0; 704 static XMesaColor *ctable = NULL; 705#endif 706 XMesaColor subColor; 707 int i, bestmatch; 708 double mindist; /* 3*2^16^2 exceeds long int precision. */ 709 710 (void) client; 711 712 /* First try just using XAllocColor. */ 713#ifdef XFree86Server 714 if (AllocColor(cmap, 715 &color->red, &color->green, &color->blue, 716 &color->pixel, 717 client) == Success) { 718#else 719 if (XAllocColor(dpy, cmap, color)) { 720#endif 721 *exact = 1; 722 *alloced = 1; 723 return; 724 } 725 726 /* Alloc failed, search for closest match */ 727 728 /* Retrieve color table entries. */ 729 /* XXX alloca candidate. */ 730#ifdef XFree86Server 731 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 732 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 733 for (i = 0; i < cmapSize; i++) { 734 ppixIn[i] = i; 735 } 736 QueryColors(cmap, cmapSize, ppixIn, ctable); 737#else 738 if (prevDisplay != dpy || prevCmap != cmap 739 || prevCmapSize != cmapSize || !ctable) { 740 /* free previously cached color table */ 741 if (ctable) 742 FREE(ctable); 743 /* Get the color table from X */ 744 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 745 assert(ctable); 746 for (i = 0; i < cmapSize; i++) { 747 ctable[i].pixel = i; 748 } 749 XQueryColors(dpy, cmap, ctable, cmapSize); 750 prevDisplay = dpy; 751 prevCmap = cmap; 752 prevCmapSize = cmapSize; 753 } 754#endif 755 756 /* Find best match. */ 757 bestmatch = -1; 758 mindist = 0.0; 759 for (i = 0; i < cmapSize; i++) { 760 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 761 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 762 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 763 double dist = dr * dr + dg * dg + db * db; 764 if (bestmatch < 0 || dist < mindist) { 765 bestmatch = i; 766 mindist = dist; 767 } 768 } 769 770 /* Return result. */ 771 subColor.red = ctable[bestmatch].red; 772 subColor.green = ctable[bestmatch].green; 773 subColor.blue = ctable[bestmatch].blue; 774 /* Try to allocate the closest match color. This should only 775 * fail if the cell is read/write. Otherwise, we're incrementing 776 * the cell's reference count. 777 */ 778#ifdef XFree86Server 779 if (AllocColor(cmap, 780 &subColor.red, &subColor.green, &subColor.blue, 781 &subColor.pixel, 782 client) == Success) { 783#else 784 if (XAllocColor(dpy, cmap, &subColor)) { 785#endif 786 *alloced = 1; 787 } 788 else { 789 /* do this to work around a problem reported by Frank Ortega */ 790 subColor.pixel = (unsigned long) bestmatch; 791 subColor.red = ctable[bestmatch].red; 792 subColor.green = ctable[bestmatch].green; 793 subColor.blue = ctable[bestmatch].blue; 794 subColor.flags = DoRed | DoGreen | DoBlue; 795 *alloced = 0; 796 } 797#ifdef XFree86Server 798 FREE(ppixIn); 799 FREE(ctable); 800#else 801 /* don't free table, save it for next time */ 802#endif 803 804 *color = subColor; 805 *exact = 0; 806} 807 808 809 810 811/* 812 * Do setup for PF_GRAYSCALE pixel format. 813 * Note that buffer may be NULL. 814 */ 815static GLboolean setup_grayscale( int client, XMesaVisual v, 816 XMesaBuffer buffer, XMesaColormap cmap ) 817{ 818 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 819 return GL_FALSE; 820 } 821 822 if (buffer) { 823 XMesaBuffer prevBuffer; 824 825 if (!cmap) { 826 return GL_FALSE; 827 } 828 829 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 830 if (prevBuffer && 831 (buffer->xm_visual->mesa_visual.rgbMode == 832 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 833 /* Copy colormap stuff from previous XMesaBuffer which uses same 834 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 835 */ 836 copy_colortable_info(buffer, prevBuffer); 837 } 838 else { 839 /* Allocate 256 shades of gray */ 840 int gray; 841 int colorsfailed = 0; 842 for (gray=0;gray<256;gray++) { 843 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 844 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 845 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 846 int exact, alloced; 847 XMesaColor xcol; 848 xcol.red = (r << 8) | r; 849 xcol.green = (g << 8) | g; 850 xcol.blue = (b << 8) | b; 851 noFaultXAllocColor( client, v->display, 852 cmap, GET_COLORMAP_SIZE(v), 853 &xcol, &exact, &alloced ); 854 if (!exact) { 855 colorsfailed++; 856 } 857 if (alloced) { 858 assert(buffer->num_alloced<256); 859 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 860 buffer->num_alloced++; 861 } 862 863 /*OLD 864 assert(gray < 576); 865 buffer->color_table[gray*3+0] = xcol.pixel; 866 buffer->color_table[gray*3+1] = xcol.pixel; 867 buffer->color_table[gray*3+2] = xcol.pixel; 868 assert(xcol.pixel < 65536); 869 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 870 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 871 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 872 */ 873 buffer->color_table[gray] = xcol.pixel; 874 assert(xcol.pixel < 65536); 875 buffer->pixel_to_r[xcol.pixel] = gray; 876 buffer->pixel_to_g[xcol.pixel] = gray; 877 buffer->pixel_to_b[xcol.pixel] = gray; 878 } 879 880 if (colorsfailed && getenv("MESA_DEBUG")) { 881 fprintf( stderr, 882 "Note: %d out of 256 needed colors do not match exactly.\n", 883 colorsfailed ); 884 } 885 } 886 } 887 888 v->dithered_pf = PF_GRAYSCALE; 889 v->undithered_pf = PF_GRAYSCALE; 890 return GL_TRUE; 891} 892 893 894 895/* 896 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 897 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 898 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 899 * color. While this function was originally designed just for 8-bit 900 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 901 * Dithering code contributed by Bob Mercier. 902 */ 903static GLboolean setup_dithered_color( int client, XMesaVisual v, 904 XMesaBuffer buffer, XMesaColormap cmap ) 905{ 906 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 907 return GL_FALSE; 908 } 909 910 if (buffer) { 911 XMesaBuffer prevBuffer; 912 913 if (!cmap) { 914 return GL_FALSE; 915 } 916 917 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 918 if (prevBuffer && 919 (buffer->xm_visual->mesa_visual.rgbMode == 920 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 921 /* Copy colormap stuff from previous, matching XMesaBuffer. 922 * Do this to avoid time spent in noFaultXAllocColor. 923 */ 924 copy_colortable_info(buffer, prevBuffer); 925 } 926 else { 927 /* Allocate X colors and initialize color_table[], red_table[], etc */ 928 int r, g, b, i; 929 int colorsfailed = 0; 930 for (r = 0; r < _R; r++) { 931 for (g = 0; g < _G; g++) { 932 for (b = 0; b < _B; b++) { 933 XMesaColor xcol; 934 int exact, alloced; 935 xcol.red =gamma_adjust(v->RedGamma, r*65535/(_R-1),65535); 936 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(_G-1),65535); 937 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(_B-1),65535); 938 noFaultXAllocColor( client, v->display, 939 cmap, GET_COLORMAP_SIZE(v), 940 &xcol, &exact, &alloced ); 941 if (!exact) { 942 colorsfailed++; 943 } 944 if (alloced) { 945 assert(buffer->num_alloced<256); 946 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 947 buffer->num_alloced++; 948 } 949 i = _MIX( r, g, b ); 950 assert(i < 576); 951 buffer->color_table[i] = xcol.pixel; 952 assert(xcol.pixel < 65536); 953 buffer->pixel_to_r[xcol.pixel] = r * 255 / (_R-1); 954 buffer->pixel_to_g[xcol.pixel] = g * 255 / (_G-1); 955 buffer->pixel_to_b[xcol.pixel] = b * 255 / (_B-1); 956 } 957 } 958 } 959 960 if (colorsfailed && getenv("MESA_DEBUG")) { 961 fprintf( stderr, 962 "Note: %d out of %d needed colors do not match exactly.\n", 963 colorsfailed, _R*_G*_B ); 964 } 965 } 966 } 967 968 v->dithered_pf = PF_DITHER; 969 v->undithered_pf = PF_LOOKUP; 970 return GL_TRUE; 971} 972 973 974/* 975 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 976 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 977 * Special dithering tables have to be initialized. 978 */ 979static void setup_8bit_hpcr( XMesaVisual v ) 980{ 981 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 982 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 983 * on the root window AND the colormap obtainable by XGetRGBColormaps 984 * for that atom must be set on the window. (see also tkInitWindow) 985 * If that colormap is not set, the output will look stripy. 986 */ 987 988 /* Setup color tables with gamma correction */ 989 int i; 990 double g; 991 992 g = 1.0 / v->RedGamma; 993 for (i=0; i<256; i++) { 994 GLint red = IROUND_POS(255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g )); 995 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 996 } 997 998 g = 1.0 / v->GreenGamma; 999 for (i=0; i<256; i++) { 1000 GLint green = IROUND_POS(255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g )); 1001 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 1002 } 1003 1004 g = 1.0 / v->BlueGamma; 1005 for (i=0; i<256; i++) { 1006 GLint blue = IROUND_POS(255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g )); 1007 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 1008 } 1009 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 1010 v->dithered_pf = PF_HPCR; 1011 1012 /* which method should I use to clear */ 1013 /* GL_FALSE: keep the ordinary method */ 1014 /* GL_TRUE : clear with dither pattern */ 1015 v->hpcr_clear_flag = getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 1016 1017 if (v->hpcr_clear_flag) { 1018 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 1019 DefaultRootWindow(v->display), 1020 16, 2, 8); 1021#ifndef XFree86Server 1022 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1023 0, 0, 16, 2, AllPlanes, ZPixmap); 1024#endif 1025 } 1026} 1027 1028 1029/* 1030 * Setup RGB rendering for a window with a True/DirectColor visual. 1031 */ 1032static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1033 XMesaColormap cmap ) 1034{ 1035 unsigned long rmask, gmask, bmask; 1036 (void) buffer; 1037 (void) cmap; 1038 1039 /* Compute red multiplier (mask) and bit shift */ 1040 v->rshift = 0; 1041 rmask = GET_REDMASK(v); 1042 while ((rmask & 1)==0) { 1043 v->rshift++; 1044 rmask = rmask >> 1; 1045 } 1046 1047 /* Compute green multiplier (mask) and bit shift */ 1048 v->gshift = 0; 1049 gmask = GET_GREENMASK(v); 1050 while ((gmask & 1)==0) { 1051 v->gshift++; 1052 gmask = gmask >> 1; 1053 } 1054 1055 /* Compute blue multiplier (mask) and bit shift */ 1056 v->bshift = 0; 1057 bmask = GET_BLUEMASK(v); 1058 while ((bmask & 1)==0) { 1059 v->bshift++; 1060 bmask = bmask >> 1; 1061 } 1062 1063 /* 1064 * Compute component-to-pixel lookup tables and dithering kernel 1065 */ 1066 { 1067 static GLubyte kernel[16] = { 1068 0*16, 8*16, 2*16, 10*16, 1069 12*16, 4*16, 14*16, 6*16, 1070 3*16, 11*16, 1*16, 9*16, 1071 15*16, 7*16, 13*16, 5*16, 1072 }; 1073 GLint rBits = bitcount(rmask); 1074 GLint gBits = bitcount(gmask); 1075 GLint bBits = bitcount(bmask); 1076 GLint maxBits; 1077 GLuint i; 1078 1079 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1080 for (i=0; i<=rmask; i++) 1081 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1082 for (i=0; i<=gmask; i++) 1083 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1084 for (i=0; i<=bmask; i++) 1085 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1086 1087 /* convert RGB values from [0,255] to pixel components */ 1088 1089 for (i=0;i<256;i++) { 1090 GLint r = gamma_adjust(v->RedGamma, i, 255); 1091 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1092 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1093 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1094 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1095 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1096 } 1097 /* overflow protection */ 1098 for (i=256;i<512;i++) { 1099 v->RtoPixel[i] = v->RtoPixel[255]; 1100 v->GtoPixel[i] = v->GtoPixel[255]; 1101 v->BtoPixel[i] = v->BtoPixel[255]; 1102 } 1103 1104 /* setup dithering kernel */ 1105 maxBits = rBits; 1106 if (gBits > maxBits) maxBits = gBits; 1107 if (bBits > maxBits) maxBits = bBits; 1108 for (i=0;i<16;i++) { 1109 v->Kernel[i] = kernel[i] >> maxBits; 1110 } 1111 1112 v->undithered_pf = PF_TRUECOLOR; 1113 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_TRUEDITHER : PF_TRUECOLOR; 1114 } 1115 1116 /* 1117 * Now check for TrueColor visuals which we can optimize. 1118 */ 1119 if ( GET_REDMASK(v) ==0x0000ff 1120 && GET_GREENMASK(v)==0x00ff00 1121 && GET_BLUEMASK(v) ==0xff0000 1122 && CHECK_BYTE_ORDER(v) 1123 && v->BitsPerPixel==32 1124 && sizeof(GLuint)==4 1125 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1126 /* common 32 bpp config used on SGI, Sun */ 1127 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1128 } 1129 else if (GET_REDMASK(v) ==0xff0000 1130 && GET_GREENMASK(v)==0x00ff00 1131 && GET_BLUEMASK(v) ==0x0000ff 1132 && CHECK_BYTE_ORDER(v) 1133 && v->BitsPerPixel==32 1134 && sizeof(GLuint)==4 1135 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1136 /* common 32 bpp config used on Linux, HP, IBM */ 1137 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1138 } 1139 else if (GET_REDMASK(v) ==0xff0000 1140 && GET_GREENMASK(v)==0x00ff00 1141 && GET_BLUEMASK(v) ==0x0000ff 1142 && CHECK_BYTE_ORDER(v) 1143 && v->BitsPerPixel==24 1144 && sizeof(GLuint)==4 1145 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1146 /* common packed 24 bpp config used on Linux */ 1147 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1148 } 1149 else if (GET_REDMASK(v) ==0xf800 1150 && GET_GREENMASK(v)==0x07e0 1151 && GET_BLUEMASK(v) ==0x001f 1152 && CHECK_BYTE_ORDER(v) 1153 && v->BitsPerPixel==16 1154 && sizeof(GLushort)==2 1155 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1156 /* 5-6-5 color weight on common PC VGA boards */ 1157 v->undithered_pf = PF_5R6G5B; 1158 v->dithered_pf = PF_DITHER_5R6G5B; 1159 } 1160 else if (GET_REDMASK(v) ==0xe0 1161 && GET_GREENMASK(v)==0x1c 1162 && GET_BLUEMASK(v) ==0x03 1163 && CHECK_FOR_HPCR(v)) { 1164 setup_8bit_hpcr( v ); 1165 } 1166} 1167 1168 1169 1170/* 1171 * Setup RGB rendering for a window with a monochrome visual. 1172 */ 1173static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1174{ 1175 (void) b; 1176 v->dithered_pf = v->undithered_pf = PF_1BIT; 1177 /* if black=1 then we must flip pixel values */ 1178 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1179} 1180 1181 1182 1183/* 1184 * When a context is "made current" for the first time, we can finally 1185 * finish initializing the context's visual and buffer information. 1186 * Input: v - the XMesaVisual to initialize 1187 * b - the XMesaBuffer to initialize (may be NULL) 1188 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1189 * window - the window/pixmap we're rendering into 1190 * cmap - the colormap associated with the window/pixmap 1191 * Return: GL_TRUE=success, GL_FALSE=failure 1192 */ 1193static GLboolean initialize_visual_and_buffer( int client, 1194 XMesaVisual v, 1195 XMesaBuffer b, 1196 GLboolean rgb_flag, 1197 XMesaDrawable window, 1198 XMesaColormap cmap 1199 ) 1200{ 1201#ifndef XFree86Server 1202 XGCValues gcvalues; 1203#endif 1204 1205 if (b) { 1206 assert(b->xm_visual == v); 1207 } 1208 1209 /* Save true bits/pixel */ 1210 v->BitsPerPixel = bits_per_pixel(v); 1211 assert(v->BitsPerPixel > 0); 1212 1213 1214 if (rgb_flag==GL_FALSE) { 1215 /* COLOR-INDEXED WINDOW: 1216 * Even if the visual is TrueColor or DirectColor we treat it as 1217 * being color indexed. This is weird but might be useful to someone. 1218 */ 1219 v->dithered_pf = v->undithered_pf = PF_INDEX; 1220 v->index_bits = GET_VISUAL_DEPTH(v); 1221 } 1222 else { 1223 /* RGB WINDOW: 1224 * We support RGB rendering into almost any kind of visual. 1225 */ 1226 int xclass; 1227 xclass = GET_VISUAL_CLASS(v); 1228 if (xclass==TrueColor || xclass==DirectColor) { 1229 setup_truecolor( v, b, cmap ); 1230 } 1231 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { 1232 setup_monochrome( v, b ); 1233 } 1234 else if (xclass==GrayScale || xclass==StaticGray) { 1235 if (!setup_grayscale( client, v, b, cmap )) { 1236 return GL_FALSE; 1237 } 1238 } 1239 else if ((xclass==PseudoColor || xclass==StaticColor) 1240 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1241 if (!setup_dithered_color( client, v, b, cmap )) { 1242 return GL_FALSE; 1243 } 1244 } 1245 else { 1246 error("XMesa: RGB mode rendering not supported in given visual."); 1247 return GL_FALSE; 1248 } 1249 v->index_bits = 0; 1250 1251 if (getenv("MESA_NO_DITHER")) { 1252 v->dithered_pf = v->undithered_pf; 1253 } 1254 } 1255 1256 1257 /* 1258 * If MESA_INFO env var is set print out some debugging info 1259 * which can help Brian figure out what's going on when a user 1260 * reports bugs. 1261 */ 1262 if (getenv("MESA_INFO")) { 1263 fprintf(stderr, "X/Mesa visual = %p\n", (void *) v); 1264 fprintf(stderr, "X/Mesa dithered pf = %u\n", v->dithered_pf); 1265 fprintf(stderr, "X/Mesa undithered pf = %u\n", v->undithered_pf); 1266 fprintf(stderr, "X/Mesa level = %d\n", v->level); 1267 fprintf(stderr, "X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1268 fprintf(stderr, "X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1269 } 1270 1271 if (b && window) { 1272 /* Do window-specific initializations */ 1273 1274 /* Window dimensions */ 1275 unsigned int w, h; 1276 get_drawable_size( v->display, window, &w, &h ); 1277 b->width = w; 1278 b->height = h; 1279 1280 b->frontbuffer = window; 1281 1282 /* Setup for single/double buffering */ 1283 if (v->mesa_visual.doubleBufferMode) { 1284 /* Double buffered */ 1285#ifndef XFree86Server 1286 b->shm = check_for_xshm( v->display ); 1287#endif 1288 xmesa_alloc_back_buffer( b ); 1289 if (b->db_state==BACK_PIXMAP) { 1290 b->buffer = (XMesaDrawable)b->backpixmap; 1291 } 1292 else { 1293 b->buffer = XIMAGE; 1294 } 1295 } 1296 else { 1297 /* Single Buffered */ 1298 b->buffer = b->frontbuffer; 1299 } 1300 1301 /* X11 graphics contexts */ 1302#ifdef XFree86Server 1303 b->gc = CreateScratchGC(v->display, window->depth); 1304#else 1305 b->gc = XCreateGC( v->display, window, 0, NULL ); 1306#endif 1307 XMesaSetFunction( v->display, b->gc, GXcopy ); 1308 1309 /* cleargc - for glClear() */ 1310#ifdef XFree86Server 1311 b->cleargc = CreateScratchGC(v->display, window->depth); 1312#else 1313 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1314#endif 1315 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1316 1317 /* 1318 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1319 * Patch contributed by Michael Pichler May 15, 1995. 1320 */ 1321#ifdef XFree86Server 1322 b->swapgc = CreateScratchGC(v->display, window->depth); 1323 { 1324 CARD32 v[1]; 1325 v[0] = FALSE; 1326 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1327 } 1328#else 1329 gcvalues.graphics_exposures = False; 1330 b->swapgc = XCreateGC( v->display, window, 1331 GCGraphicsExposures, &gcvalues); 1332#endif 1333 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1334 /* 1335 * Set fill style and tile pixmap once for all for HPCR stuff 1336 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1337 * Initialize whole stuff 1338 * Patch contributed by Jacques Leroy March 8, 1998. 1339 */ 1340 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1341 int i; 1342 for (i=0; i<16; i++) 1343 { 1344 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1345 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1346 } 1347 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1348 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1349 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1350 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1351 } 1352 1353 /* Initialize the row buffer XImage for use in write_color_span() */ 1354#ifdef XFree86Server 1355 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1356 (char *)MALLOC(MAX_WIDTH*4)); 1357#else 1358 b->rowimage = XCreateImage( v->display, 1359 v->visinfo->visual, 1360 v->visinfo->depth, 1361 ZPixmap, 0, /*format, offset*/ 1362 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1363 MAX_WIDTH, 1, /*width, height*/ 1364 32, /*bitmap_pad*/ 1365 0 /*bytes_per_line*/ ); 1366#endif 1367 } 1368 1369 return GL_TRUE; 1370} 1371 1372 1373 1374/* 1375 * Convert an RGBA color to a pixel value. 1376 */ 1377unsigned long 1378xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1379 GLuint pixelFormat) 1380{ 1381 switch (pixelFormat) { 1382 case PF_INDEX: 1383 return 0; 1384 case PF_TRUECOLOR: 1385 { 1386 unsigned long p; 1387 PACK_TRUECOLOR( p, r, g, b ); 1388 return p; 1389 } 1390 case PF_8A8B8G8R: 1391 return PACK_8A8B8G8R( r, g, b, a ); 1392 case PF_8R8G8B: 1393 /* fall through */ 1394 case PF_8R8G8B24: 1395 return PACK_8R8G8B( r, g, b ); 1396 case PF_5R6G5B: 1397 return PACK_5R6G5B( r, g, b ); 1398 case PF_DITHER: 1399 { 1400 DITHER_SETUP; 1401 return DITHER( 1, 0, r, g, b ); 1402 } 1403 case PF_1BIT: 1404 /* 382 = (3*255)/2 */ 1405 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1406 case PF_HPCR: 1407 return DITHER_HPCR(1, 1, r, g, b); 1408 case PF_LOOKUP: 1409 { 1410 LOOKUP_SETUP; 1411 return LOOKUP( r, g, b ); 1412 } 1413 case PF_GRAYSCALE: 1414 return GRAY_RGB( r, g, b ); 1415 case PF_TRUEDITHER: 1416 /* fall through */ 1417 case PF_DITHER_5R6G5B: 1418 { 1419 unsigned long p; 1420 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1421 return p; 1422 } 1423 default: 1424 _mesa_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1425 } 1426 return 0; 1427} 1428 1429 1430/**********************************************************************/ 1431/***** Public Functions *****/ 1432/**********************************************************************/ 1433 1434 1435/* 1436 * Create a new X/Mesa visual. 1437 * Input: display - X11 display 1438 * visinfo - an XVisualInfo pointer 1439 * rgb_flag - GL_TRUE = RGB mode, 1440 * GL_FALSE = color index mode 1441 * alpha_flag - alpha buffer requested? 1442 * db_flag - GL_TRUE = double-buffered, 1443 * GL_FALSE = single buffered 1444 * stereo_flag - stereo visual? 1445 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1446 * GL_FALSE = use an off-screen pixmap for back buffer 1447 * depth_size - requested bits/depth values, or zero 1448 * stencil_size - requested bits/stencil values, or zero 1449 * accum_red_size - requested bits/red accum values, or zero 1450 * accum_green_size - requested bits/green accum values, or zero 1451 * accum_blue_size - requested bits/blue accum values, or zero 1452 * accum_alpha_size - requested bits/alpha accum values, or zero 1453 * num_samples - number of samples/pixel if multisampling, or zero 1454 * level - visual level, usually 0 1455 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT 1456 * Return; a new XMesaVisual or 0 if error. 1457 */ 1458XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1459 XMesaVisualInfo visinfo, 1460 GLboolean rgb_flag, 1461 GLboolean alpha_flag, 1462 GLboolean db_flag, 1463 GLboolean stereo_flag, 1464 GLboolean ximage_flag, 1465 GLint depth_size, 1466 GLint stencil_size, 1467 GLint accum_red_size, 1468 GLint accum_green_size, 1469 GLint accum_blue_size, 1470 GLint accum_alpha_size, 1471 GLint num_samples, 1472 GLint level, 1473 GLint visualCaveat ) 1474{ 1475 char *gamma; 1476 XMesaVisual v; 1477 GLint red_bits, green_bits, blue_bits, alpha_bits; 1478 1479 /* For debugging only */ 1480 if (getenv("MESA_XSYNC")) { 1481 /* This makes debugging X easier. 1482 * In your debugger, set a breakpoint on _XError to stop when an 1483 * X protocol error is generated. 1484 */ 1485#ifdef XFree86Server 1486 /* NOT_NEEDED */ 1487#else 1488 XSynchronize( display, 1 ); 1489#endif 1490 } 1491 1492 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1493 if (!v) { 1494 return NULL; 1495 } 1496 1497 /* 1498 * In the X server, NULL is passed in for the display. It will have 1499 * to be set before using this visual. See XMesaSetVisualDisplay() 1500 * below. 1501 */ 1502 v->display = display; 1503 1504 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1505 * the struct but we may need some of the information contained in it 1506 * at a later time. 1507 */ 1508#ifdef XFree86Server 1509 v->visinfo = visinfo; 1510#else 1511 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1512 if(!v->visinfo) { 1513 FREE(v); 1514 return NULL; 1515 } 1516 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1517 1518 /* Save a copy of the pointer now so we can find this visual again 1519 * if we need to search for it in find_glx_visual(). 1520 */ 1521 v->vishandle = visinfo; 1522#endif 1523 1524#ifdef XFree86Server 1525 /* Initialize the depth of the screen */ 1526 { 1527 PixmapFormatRec *format; 1528 1529 for (format = screenInfo.formats; 1530 format->depth != display->rootDepth; 1531 format++) 1532 ; 1533 v->screen_depth = format->bitsPerPixel; 1534 } 1535#endif 1536 1537 /* check for MESA_GAMMA environment variable */ 1538 gamma = getenv("MESA_GAMMA"); 1539 if (gamma) { 1540 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1541 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1542 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1543 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1544 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1545 } 1546 else { 1547 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1548 } 1549 1550 v->ximage_flag = ximage_flag; 1551 v->level = level; 1552 v->VisualCaveat = visualCaveat; 1553 1554 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1555 1556 { 1557 int xclass; 1558 xclass = GET_VISUAL_CLASS(v); 1559 if (xclass==TrueColor || xclass==DirectColor) { 1560 red_bits = bitcount(GET_REDMASK(v)); 1561 green_bits = bitcount(GET_GREENMASK(v)); 1562 blue_bits = bitcount(GET_BLUEMASK(v)); 1563 alpha_bits = 0; 1564 } 1565 else { 1566 /* this is an approximation */ 1567 int depth; 1568 depth = GET_VISUAL_DEPTH(v); 1569 red_bits = depth / 3; 1570 depth -= red_bits; 1571 green_bits = depth / 2; 1572 depth -= green_bits; 1573 blue_bits = depth; 1574 alpha_bits = 0; 1575 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1576 } 1577 } 1578 1579 if (alpha_flag && alpha_bits == 0) 1580 alpha_bits = 8; 1581 1582 _mesa_initialize_visual( &v->mesa_visual, 1583 rgb_flag, db_flag, stereo_flag, 1584 red_bits, green_bits, 1585 blue_bits, alpha_bits, 1586 v->index_bits, 1587 depth_size, 1588 stencil_size, 1589 accum_red_size, accum_green_size, 1590 accum_blue_size, accum_alpha_size, 1591 0 ); 1592 return v; 1593} 1594 1595 1596void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1597{ 1598 v->display = dpy; 1599} 1600 1601 1602void XMesaDestroyVisual( XMesaVisual v ) 1603{ 1604#ifndef XFree86Server 1605 FREE(v->visinfo); 1606#endif 1607 FREE(v); 1608} 1609 1610 1611 1612/* 1613 * Create a new XMesaContext. 1614 * Input: v - XMesaVisual 1615 * share_list - another XMesaContext with which to share display 1616 * lists or NULL if no sharing is wanted. 1617 * Return: an XMesaContext or NULL if error. 1618 */ 1619XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1620{ 1621 XMesaContext c; 1622 GLcontext *ctx; 1623 GLboolean direct = GL_TRUE; /* XXXX */ 1624 /* NOT_DONE: should this be GL_FALSE??? */ 1625 static GLboolean firstTime = GL_TRUE; 1626 1627 if (firstTime) { 1628 _glthread_INIT_MUTEX(_xmesa_lock); 1629 firstTime = GL_FALSE; 1630 } 1631 1632 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1633 if (!c) { 1634 return NULL; 1635 } 1636 1637 ctx = c->gl_ctx = _mesa_create_context( &v->mesa_visual, 1638 share_list ? share_list->gl_ctx : (GLcontext *) NULL, 1639 (void *) c, direct ); 1640 if (!c->gl_ctx) { 1641 FREE(c); 1642 return NULL; 1643 } 1644 1645 _mesa_enable_sw_extensions(ctx); 1646 _mesa_enable_1_3_extensions(ctx); 1647 1648 if (CHECK_BYTE_ORDER(v)) { 1649 c->swapbytes = GL_FALSE; 1650 } 1651 else { 1652 c->swapbytes = GL_TRUE; 1653 } 1654 1655 c->xm_visual = v; 1656 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1657 c->display = v->display; 1658 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1659 1660 ctx->Driver.UpdateState = xmesa_update_state; 1661 1662 /* Initialize the software rasterizer and helper modules. 1663 */ 1664 _swrast_CreateContext( ctx ); 1665 _ac_CreateContext( ctx ); 1666 _tnl_CreateContext( ctx ); 1667 _swsetup_CreateContext( ctx ); 1668 1669 xmesa_register_swrast_functions( ctx ); 1670 1671 /* Set up some constant pointers: 1672 */ 1673 xmesa_init_pointers( ctx ); 1674 1675 1676 /* Run the config file 1677 */ 1678 _mesa_read_config_file( ctx ); 1679 1680 1681 return c; 1682} 1683 1684 1685 1686 1687void XMesaDestroyContext( XMesaContext c ) 1688{ 1689#ifdef FX 1690 if (c->xm_buffer && c->xm_buffer->FXctx) 1691 fxMesaDestroyContext(c->xm_buffer->FXctx); 1692#endif 1693 if (c->gl_ctx) { 1694 _swsetup_DestroyContext( c->gl_ctx ); 1695 _swrast_DestroyContext( c->gl_ctx ); 1696 _tnl_DestroyContext( c->gl_ctx ); 1697 _ac_DestroyContext( c->gl_ctx ); 1698 _mesa_destroy_context( c->gl_ctx ); 1699 } 1700 1701 FREE( c ); 1702} 1703 1704 1705 1706/* 1707 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1708 * Create a new XMesaBuffer from an X window. 1709 * Input: v - the XMesaVisual 1710 * w - the window 1711 * c - the context 1712 * Return: new XMesaBuffer or NULL if error 1713 */ 1714XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1715 XMesaContext c ) 1716{ 1717#ifndef XFree86Server 1718 XWindowAttributes attr; 1719#endif 1720#ifdef FX 1721 char *fxEnvVar; 1722#endif 1723 int client = 0; 1724 1725 XMesaBuffer b = alloc_xmesa_buffer(); 1726 if (!b) { 1727 return NULL; 1728 } 1729 1730 (void) c; 1731 1732#ifdef XFree86Server 1733 client = CLIENT_ID(((XMesaDrawable)w)->id); 1734#endif 1735 1736 assert(v); 1737 1738#ifdef XFree86Server 1739 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1740#else 1741 XGetWindowAttributes( v->display, w, &attr ); 1742 1743 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1744#endif 1745 if (getenv("MESA_DEBUG")) { 1746 fprintf(stderr, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1747 } 1748 return NULL; 1749 } 1750 1751 b->xm_visual = v; 1752 b->type = WINDOW; 1753 b->display = v->display; 1754#ifdef XFree86Server 1755 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1756#else 1757 if (attr.colormap) { 1758 b->cmap = attr.colormap; 1759 } 1760 else { 1761 if (getenv("MESA_DEBUG")) { 1762 fprintf(stderr, "Window %u has no colormap!\n", (unsigned int) w); 1763 } 1764 /* this is weird, a window w/out a colormap!? */ 1765 /* OK, let's just allocate a new one and hope for the best */ 1766 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1767 } 1768#endif 1769 1770 /* determine back buffer implementation */ 1771 if (v->mesa_visual.doubleBufferMode) { 1772 if (v->ximage_flag) { 1773 b->db_state = BACK_XIMAGE; 1774 } 1775 else { 1776 b->db_state = BACK_PIXMAP; 1777 } 1778 } 1779 else { 1780 b->db_state = 0; 1781 } 1782 1783 _mesa_initialize_framebuffer(&b->mesa_buffer, 1784 &v->mesa_visual, 1785 v->mesa_visual.depthBits > 0, 1786 v->mesa_visual.stencilBits > 0, 1787 v->mesa_visual.accumRedBits > 0, 1788 v->mesa_visual.alphaBits > 0 ); 1789 1790 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1791 (XMesaDrawable)w, b->cmap )) { 1792 free_xmesa_buffer(client, b); 1793 return NULL; 1794 } 1795 1796#ifdef FX 1797 fxEnvVar = getenv("MESA_GLX_FX"); 1798 if (fxEnvVar) { 1799 if (fxEnvVar[0]!='d') { 1800 int attribs[100]; 1801 int numAttribs = 0; 1802 int hw; 1803 if (v->mesa_visual.depthBits > 0) { 1804 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1805 attribs[numAttribs++] = 1; 1806 } 1807 if (v->mesa_visual.doubleBufferMode) { 1808 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1809 } 1810 if (v->mesa_visual.accumRedBits > 0) { 1811 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1812 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1813 } 1814 if (v->mesa_visual.stencilBits > 0) { 1815 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1816 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1817 } 1818 if (v->mesa_visual.alphaBits > 0) { 1819 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1820 attribs[numAttribs++] = 1; 1821 } 1822 if (c->gl_ctx) { 1823#define FXMESA_SHARE_CONTEXT 990099 /* keep in sync with fxapi.c! */ 1824 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1825 attribs[numAttribs++] = (int) c->gl_ctx; 1826 } 1827 attribs[numAttribs++] = FXMESA_NONE; 1828 1829 if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) { 1830 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1831 if ((v->undithered_pf!=PF_INDEX) && (b->backimage)) { 1832 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1833 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1834 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1835 else 1836 b->FXwindowHack = GL_FALSE; 1837 } 1838 } 1839 else { 1840 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1841 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1842 GR_REFRESH_75Hz, attribs); 1843 else 1844 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1845 b->FXisHackUsable = GL_FALSE; 1846 b->FXwindowHack = GL_FALSE; 1847 } 1848 /* 1849 fprintf(stderr, 1850 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1851 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1852 */ 1853 } 1854 } 1855 else { 1856 fprintf(stderr,"WARNING: This Mesa Library includes the Glide driver but\n"); 1857 fprintf(stderr," you have not defined the MESA_GLX_FX env. var.\n"); 1858 fprintf(stderr," (check the README.3DFX file for more information).\n\n"); 1859 fprintf(stderr," you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1860 } 1861#endif 1862 1863 return b; 1864} 1865 1866 1867XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1868{ 1869 return XMesaCreateWindowBuffer2( v, w, NULL ); 1870} 1871 1872 1873/* 1874 * Create a new XMesaBuffer from an X pixmap. 1875 * Input: v - the XMesaVisual 1876 * p - the pixmap 1877 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor 1878 * visual for the pixmap 1879 * Return: new XMesaBuffer or NULL if error 1880 */ 1881XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1882 XMesaPixmap p, XMesaColormap cmap ) 1883{ 1884 int client = 0; 1885 XMesaBuffer b = alloc_xmesa_buffer(); 1886 if (!b) { 1887 return NULL; 1888 } 1889 1890 1891#ifdef XFree86Server 1892 client = CLIENT_ID(((XMesaDrawable)p)->id); 1893#endif 1894 1895 assert(v); 1896 1897 b->xm_visual = v; 1898 b->type = PIXMAP; 1899 b->display = v->display; 1900 b->cmap = cmap; 1901 1902 /* determine back buffer implementation */ 1903 if (v->mesa_visual.doubleBufferMode) { 1904 if (v->ximage_flag) { 1905 b->db_state = BACK_XIMAGE; 1906 } 1907 else { 1908 b->db_state = BACK_PIXMAP; 1909 } 1910 } 1911 else { 1912 b->db_state = 0; 1913 } 1914 1915 _mesa_initialize_framebuffer(&b->mesa_buffer, 1916 &v->mesa_visual, 1917 v->mesa_visual.depthBits > 0, 1918 v->mesa_visual.stencilBits > 0, 1919 v->mesa_visual.accumRedBits + 1920 v->mesa_visual.accumGreenBits + 1921 v->mesa_visual.accumBlueBits > 0, 1922 v->mesa_visual.alphaBits > 0 ); 1923 1924 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1925 (XMesaDrawable)p, cmap)) { 1926 free_xmesa_buffer(client, b); 1927 return NULL; 1928 } 1929 1930 return b; 1931} 1932 1933 1934 1935#if 0 /* not done */ 1936XMesaBuffer XMesaCreatePBuffer( XMesaVisual v, XMesaColormap cmap, 1937 unsigned int width, unsigned int height ) 1938{ 1939 int client = 0; 1940 XMesaBuffer b = alloc_xmesa_buffer(); 1941 if (!b) { 1942 return NULL; 1943 } 1944 1945 b->xm_visual = v; 1946 b->pbuffer_flag = GL_TRUE; 1947 b->display = v->display; 1948 b->cmap = cmap; 1949 1950 /* determine back buffer implementation */ 1951 if (v->mesa_visual.doubleBufferMode) { 1952 if (v->ximage_flag) { 1953 b->db_state = BACK_XIMAGE; 1954 } 1955 else { 1956 b->db_state = BACK_PIXMAP; 1957 } 1958 } 1959 else { 1960 b->db_state = 0; 1961 } 1962 1963 _mesa_initialize_framebuffer(&b->mesa_buffer, 1964 &v->mesa_visual, 1965 v->mesa_visual.depthBits > 0, 1966 v->mesa_visual.stencilBits > 0, 1967 v->mesa_visual.accumRedBits + 1968 v->mesa_visual.accumGreenBits + 1969 v->mesa_visual.accumBlueBits > 0, 1970 v->mesa_visual.alphaBits > 0 ); 1971 1972 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1973 0, cmap)) { 1974 free_xmesa_buffer(client, b); 1975 return NULL; 1976 } 1977 1978 return b; 1979} 1980#endif 1981 1982 1983 1984/* 1985 * Deallocate an XMesaBuffer structure and all related info. 1986 */ 1987void XMesaDestroyBuffer( XMesaBuffer b ) 1988{ 1989 int client = 0; 1990 1991#ifdef XFree86Server 1992 if (b->frontbuffer) 1993 client = CLIENT_ID(b->frontbuffer->id); 1994#endif 1995 1996 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1997 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1998 if (b->swapgc) XMesaFreeGC( b->xm_visual->display, b->swapgc ); 1999 2000 if (b->backimage) { 2001#if defined(USE_XSHM) && !defined(XFree86Server) 2002 if (b->shm) { 2003 XShmDetach( b->xm_visual->display, &b->shminfo ); 2004 XDestroyImage( b->backimage ); 2005 shmdt( b->shminfo.shmaddr ); 2006 } 2007 else 2008#endif 2009 XMesaDestroyImage( b->backimage ); 2010 } 2011 if (b->backpixmap) { 2012 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 2013 if (b->xm_visual->hpcr_clear_flag) { 2014 XMesaFreePixmap( b->xm_visual->display, 2015 b->xm_visual->hpcr_clear_pixmap ); 2016 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 2017 } 2018 } 2019 if (b->rowimage) { 2020 FREE( b->rowimage->data ); 2021 b->rowimage->data = NULL; 2022 XMesaDestroyImage( b->rowimage ); 2023 } 2024 2025 free_xmesa_buffer(client, b); 2026} 2027 2028 2029 2030/* 2031 * Bind buffer b to context c and make c the current rendering context. 2032 */ 2033GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2034{ 2035 return XMesaMakeCurrent2( c, b, b ); 2036} 2037 2038 2039/* 2040 * Bind buffer b to context c and make c the current rendering context. 2041 */ 2042GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2043 XMesaBuffer readBuffer ) 2044{ 2045 if (c) { 2046 if (!drawBuffer || !readBuffer) 2047 return GL_FALSE; /* must specify buffers! */ 2048 2049#ifdef FX 2050 if (drawBuffer->FXctx) { 2051 fxMesaMakeCurrent(drawBuffer->FXctx); 2052 2053 c->xm_buffer = drawBuffer; 2054 c->xm_read_buffer = readBuffer; 2055 c->use_read_buffer = (drawBuffer != readBuffer); 2056 2057 return GL_TRUE; 2058 } 2059#endif 2060 if (c->gl_ctx == _mesa_get_current_context() 2061 && c->xm_buffer == drawBuffer 2062 && c->xm_read_buffer == readBuffer 2063 && c->xm_buffer->wasCurrent) { 2064 /* same context and buffer, do nothing */ 2065 return GL_TRUE; 2066 } 2067 2068 c->xm_buffer = drawBuffer; 2069 c->xm_read_buffer = readBuffer; 2070 c->use_read_buffer = (drawBuffer != readBuffer); 2071 2072 _mesa_make_current2(c->gl_ctx, 2073 &drawBuffer->mesa_buffer, 2074 &readBuffer->mesa_buffer); 2075 2076 if (c->gl_ctx->Viewport.Width == 0) { 2077 /* initialize viewport to window size */ 2078 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2079 c->gl_ctx->Scissor.Width = drawBuffer->width; 2080 c->gl_ctx->Scissor.Height = drawBuffer->height; 2081 } 2082 2083 if (c->xm_visual->mesa_visual.rgbMode) { 2084 /* 2085 * Must recompute and set these pixel values because colormap 2086 * can be different for different windows. 2087 */ 2088 c->clearpixel = xmesa_color_to_pixel( c, 2089 c->clearcolor[0], 2090 c->clearcolor[1], 2091 c->clearcolor[2], 2092 c->clearcolor[3], 2093 c->xm_visual->undithered_pf); 2094 XMesaSetForeground(c->display, c->xm_buffer->cleargc, c->clearpixel); 2095 } 2096 2097 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2098 c->xm_buffer->wasCurrent = GL_TRUE; 2099 } 2100 else { 2101 /* Detach */ 2102 _mesa_make_current2( NULL, NULL, NULL ); 2103 } 2104 return GL_TRUE; 2105} 2106 2107 2108/* 2109 * Unbind the context c from its buffer. 2110 */ 2111GLboolean XMesaUnbindContext( XMesaContext c ) 2112{ 2113 /* A no-op for XFree86 integration purposes */ 2114 return GL_TRUE; 2115} 2116 2117 2118XMesaContext XMesaGetCurrentContext( void ) 2119{ 2120 GET_CURRENT_CONTEXT(ctx); 2121 if (ctx) { 2122 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2123 return xmesa; 2124 } 2125 else { 2126 return 0; 2127 } 2128} 2129 2130 2131XMesaBuffer XMesaGetCurrentBuffer( void ) 2132{ 2133 GET_CURRENT_CONTEXT(ctx); 2134 if (ctx) { 2135 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2136 return xmesa->xm_buffer; 2137 } 2138 else { 2139 return 0; 2140 } 2141} 2142 2143 2144/* New in Mesa 3.1 */ 2145XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2146{ 2147 GET_CURRENT_CONTEXT(ctx); 2148 if (ctx) { 2149 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2150 return xmesa->xm_buffer; 2151 } 2152 else { 2153 return 0; 2154 } 2155} 2156 2157 2158GLboolean XMesaForceCurrent(XMesaContext c) 2159{ 2160 if (c) { 2161 if (c->gl_ctx != _mesa_get_current_context()) { 2162 _mesa_make_current(c->gl_ctx, &c->xm_buffer->mesa_buffer); 2163 } 2164 } 2165 else { 2166 _mesa_make_current(NULL, NULL); 2167 } 2168 return GL_TRUE; 2169} 2170 2171 2172GLboolean XMesaLoseCurrent(XMesaContext c) 2173{ 2174 (void) c; 2175 _mesa_make_current(NULL, NULL); 2176 return GL_TRUE; 2177} 2178 2179 2180/* 2181 * Switch 3Dfx support hack between window and full-screen mode. 2182 */ 2183GLboolean XMesaSetFXmode( GLint mode ) 2184{ 2185#ifdef FX 2186 const char *fx = getenv("MESA_GLX_FX"); 2187 if (fx && fx[0] != 'd') { 2188 GET_CURRENT_CONTEXT(ctx); 2189 GrHwConfiguration hw; 2190 if (!FX_grSstQueryHardware(&hw)) { 2191 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2192 return GL_FALSE; 2193 } 2194 if (hw.num_sst < 1) { 2195 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2196 return GL_FALSE; 2197 } 2198 if (ctx) { 2199 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2200 if (mode == XMESA_FX_WINDOW) { 2201 if (xmesa->xm_buffer->FXisHackUsable) { 2202 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2203 xmesa->xm_buffer->FXwindowHack = GL_TRUE; 2204 return GL_TRUE; 2205 } 2206 } 2207 else if (mode == XMESA_FX_FULLSCREEN) { 2208 FX_grSstControl(GR_CONTROL_ACTIVATE); 2209 xmesa->xm_buffer->FXwindowHack = GL_FALSE; 2210 return GL_TRUE; 2211 } 2212 else { 2213 /* Error: Bad mode value */ 2214 } 2215 } 2216 } 2217 /*fprintf(stderr, "fallthrough\n");*/ 2218#else 2219 (void) mode; 2220#endif 2221 return GL_FALSE; 2222} 2223 2224 2225 2226#ifdef FX 2227/* 2228 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2229 */ 2230static void FXgetImage( XMesaBuffer b ) 2231{ 2232 GET_CURRENT_CONTEXT(ctx); 2233 static unsigned short pixbuf[MAX_WIDTH]; 2234 GLuint x, y; 2235 int xpos, ypos; 2236 XMesaWindow root; 2237 unsigned int bw, depth, width, height; 2238 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2239 2240 assert(xmesa->xm_buffer->FXctx); 2241 2242#ifdef XFree86Server 2243 x = b->frontbuffer->x; 2244 y = b->frontbuffer->y; 2245 width = b->frontbuffer->width; 2246 height = b->frontbuffer->height; 2247 depth = b->frontbuffer->depth; 2248#else 2249 XGetGeometry( xmesa->xm_visual->display, b->frontbuffer, 2250 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2251#endif 2252 if (b->width != width || b->height != height) { 2253 b->width = MIN2((int)width, xmesa->xm_buffer->FXctx->width); 2254 b->height = MIN2((int)height, xmesa->xm_buffer->FXctx->height); 2255 if (b->width & 1) 2256 b->width--; /* prevent odd width */ 2257 xmesa_alloc_back_buffer( b ); 2258 } 2259 2260 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2261 if (xmesa->xm_visual->undithered_pf==PF_5R6G5B) { 2262 /* Special case: 16bpp RGB */ 2263 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2264 0, xmesa->xm_buffer->FXctx->height - b->height, /*pos*/ 2265 b->width, b->height, /* size */ 2266 b->width * sizeof(GLushort), /* stride */ 2267 b->backimage->data); /* dest buffer */ 2268 } 2269 else if (xmesa->xm_visual->dithered_pf==PF_DITHER 2270 && GET_VISUAL_DEPTH(xmesa->xm_visual)==8) { 2271 /* Special case: 8bpp RGB */ 2272 for (y=0;y<b->height;y++) { 2273 GLubyte *ptr = (GLubyte*) xmesa->xm_buffer->backimage->data 2274 + xmesa->xm_buffer->backimage->bytes_per_line * y; 2275 XDITHER_SETUP(y); 2276 2277 /* read row from 3Dfx frame buffer */ 2278 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2279 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2280 b->width, 1, 2281 0, 2282 pixbuf ); 2283 2284 /* write to XImage back buffer */ 2285 for (x=0;x<b->width;x++) { 2286 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2287 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2288 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2289 *ptr++ = XDITHER( x, r, g, b); 2290 } 2291 } 2292 } 2293 else { 2294 /* General case: slow! */ 2295 for (y=0;y<b->height;y++) { 2296 /* read row from 3Dfx frame buffer */ 2297 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2298 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2299 b->width, 1, 2300 0, 2301 pixbuf ); 2302 2303 /* write to XImage back buffer */ 2304 for (x=0;x<b->width;x++) { 2305 XMesaPutPixel(b->backimage,x,y, 2306 xmesa_color_to_pixel(xmesa, 2307 (pixbuf[x] & 0xf800) >> 8, 2308 (pixbuf[x] & 0x07e0) >> 3, 2309 (pixbuf[x] & 0x001f) << 3, 2310 0xff, xmesa->pixelformat)); 2311 } 2312 } 2313 } 2314 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2315} 2316#endif 2317 2318 2319/* 2320 * Copy the back buffer to the front buffer. If there's no back buffer 2321 * this is a no-op. 2322 */ 2323void XMesaSwapBuffers( XMesaBuffer b ) 2324{ 2325 GET_CURRENT_CONTEXT(ctx); 2326 2327 /* If we're swapping the buffer associated with the current context 2328 * we have to flush any pending rendering commands first. 2329 */ 2330 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2331 _mesa_swapbuffers(ctx); 2332 2333 if (b->db_state) { 2334#ifdef FX 2335 if (b->FXctx) { 2336 fxMesaSwapBuffers(); 2337 2338 if (b->FXwindowHack) 2339 FXgetImage(b); 2340 else 2341 return; 2342 } 2343#endif 2344 if (b->backimage) { 2345 /* Copy Ximage from host's memory to server's window */ 2346#if defined(USE_XSHM) && !defined(XFree86Server) 2347 if (b->shm) { 2348 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2349 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2350 b->swapgc, 2351 b->backimage, 0, 0, 2352 0, 0, b->width, b->height, False ); 2353 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2354 } 2355 else 2356#endif 2357 { 2358 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2359 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2360 b->swapgc, 2361 b->backimage, 0, 0, 2362 0, 0, b->width, b->height ); 2363 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2364 } 2365 } 2366 else { 2367 /* Copy pixmap to window on server */ 2368 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2369 XMesaCopyArea( b->xm_visual->display, 2370 b->backpixmap, /* source drawable */ 2371 b->frontbuffer, /* dest. drawable */ 2372 b->swapgc, 2373 0, 0, b->width, b->height, /* source region */ 2374 0, 0 /* dest region */ 2375 ); 2376 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2377 } 2378 } 2379#if !defined(XFree86Server) 2380 XSync( b->xm_visual->display, False ); 2381#endif 2382} 2383 2384 2385 2386/* 2387 * Copy sub-region of back buffer to front buffer 2388 */ 2389void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2390{ 2391 GET_CURRENT_CONTEXT(ctx); 2392 2393 /* If we're swapping the buffer associated with the current context 2394 * we have to flush any pending rendering commands first. 2395 */ 2396 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2397 _mesa_swapbuffers(ctx); 2398 2399 if (b->db_state) { 2400 int yTop = b->height - y - height; 2401#ifdef FX 2402 if (b->FXctx) { 2403 fxMesaSwapBuffers(); 2404 if (b->FXwindowHack) 2405 FXgetImage(b); 2406 else 2407 return; 2408 } 2409#endif 2410 if (b->backimage) { 2411 /* Copy Ximage from host's memory to server's window */ 2412#if defined(USE_XSHM) && !defined(XFree86Server) 2413 if (b->shm) { 2414 /* XXX assuming width and height aren't too large! */ 2415 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2416 b->swapgc, 2417 b->backimage, x, yTop, 2418 x, yTop, width, height, False ); 2419 /* wait for finished event??? */ 2420 } 2421 else 2422#endif 2423 { 2424 /* XXX assuming width and height aren't too large! */ 2425 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2426 b->swapgc, 2427 b->backimage, x, yTop, 2428 x, yTop, width, height ); 2429 } 2430 } 2431 else { 2432 /* Copy pixmap to window on server */ 2433 XMesaCopyArea( b->xm_visual->display, 2434 b->backpixmap, /* source drawable */ 2435 b->frontbuffer, /* dest. drawable */ 2436 b->swapgc, 2437 x, yTop, width, height, /* source region */ 2438 x, yTop /* dest region */ 2439 ); 2440 } 2441 } 2442} 2443 2444 2445/* 2446 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2447 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2448 * back buffer directly. 2449 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2450 * ximage - pointer to back buffer's XImage, or NULL 2451 * Return: GL_TRUE = context is double buffered 2452 * GL_FALSE = context is single buffered 2453 */ 2454GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2455 XMesaPixmap *pixmap, 2456 XMesaImage **ximage ) 2457{ 2458 if (b->db_state) { 2459 if (pixmap) *pixmap = b->backpixmap; 2460 if (ximage) *ximage = b->backimage; 2461 return GL_TRUE; 2462 } 2463 else { 2464 *pixmap = 0; 2465 *ximage = NULL; 2466 return GL_FALSE; 2467 } 2468} 2469 2470 2471/* 2472 * Return the depth buffer associated with an XMesaBuffer. 2473 * Input: b - the XMesa buffer handle 2474 * Output: width, height - size of buffer in pixels 2475 * bytesPerValue - bytes per depth value (2 or 4) 2476 * buffer - pointer to depth buffer values 2477 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2478 */ 2479GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2480 GLint *bytesPerValue, void **buffer ) 2481{ 2482 if (!b->mesa_buffer.DepthBuffer) { 2483 *width = 0; 2484 *height = 0; 2485 *bytesPerValue = 0; 2486 *buffer = 0; 2487 return GL_FALSE; 2488 } 2489 else { 2490 *width = b->mesa_buffer.Width; 2491 *height = b->mesa_buffer.Height; 2492 *bytesPerValue = sizeof(GLdepth); 2493 *buffer = b->mesa_buffer.DepthBuffer; 2494 return GL_TRUE; 2495 } 2496} 2497 2498 2499void XMesaFlush( XMesaContext c ) 2500{ 2501 if (c && c->xm_visual) { 2502#ifdef XFree86Server 2503 /* NOT_NEEDED */ 2504#else 2505 XSync( c->xm_visual->display, False ); 2506#endif 2507 } 2508} 2509 2510 2511 2512const char *XMesaGetString( XMesaContext c, int name ) 2513{ 2514 (void) c; 2515 if (name==XMESA_VERSION) { 2516 return "3.5"; 2517 } 2518 else if (name==XMESA_EXTENSIONS) { 2519 return ""; 2520 } 2521 else { 2522 return NULL; 2523 } 2524} 2525 2526 2527 2528XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2529{ 2530 XMesaBuffer b; 2531 for (b=XMesaBufferList; b; b=b->Next) { 2532 if (b->frontbuffer==d && b->display==dpy) { 2533 return b; 2534 } 2535 } 2536 return NULL; 2537} 2538 2539 2540 2541/* 2542 * Look for XMesaBuffers whose X window has been destroyed. 2543 * Deallocate any such XMesaBuffers. 2544 */ 2545void XMesaGarbageCollect( void ) 2546{ 2547 XMesaBuffer b, next; 2548 for (b=XMesaBufferList; b; b=next) { 2549 next = b->Next; 2550 if (b->display && b->frontbuffer && b->type == WINDOW) { 2551#ifdef XFree86Server 2552 /* NOT_NEEDED */ 2553#else 2554 XSync(b->display, False); 2555 if (!window_exists( b->display, b->frontbuffer )) { 2556 /* found a dead window, free the ancillary info */ 2557 XMesaDestroyBuffer( b ); 2558 } 2559#endif 2560 } 2561 } 2562} 2563 2564 2565void XMesaReset( void ) 2566{ 2567 while (XMesaBufferList) 2568 XMesaDestroyBuffer(XMesaBufferList); 2569 2570 XMesaBufferList = NULL; 2571} 2572 2573 2574unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2575 GLfloat red, GLfloat green, 2576 GLfloat blue, GLfloat alpha ) 2577{ 2578 GLint r = (GLint) (red * 255.0F); 2579 GLint g = (GLint) (green * 255.0F); 2580 GLint b = (GLint) (blue * 255.0F); 2581 GLint a = (GLint) (alpha * 255.0F); 2582 2583 switch (xmesa->pixelformat) { 2584 case PF_INDEX: 2585 return 0; 2586 case PF_TRUECOLOR: 2587 { 2588 unsigned long p; 2589 PACK_TRUECOLOR( p, r, g, b ); 2590 return p; 2591 } 2592 case PF_8A8B8G8R: 2593 return PACK_8A8B8G8R( r, g, b, a ); 2594 case PF_8R8G8B: 2595 return PACK_8R8G8B( r, g, b ); 2596 case PF_5R6G5B: 2597 return PACK_5R6G5B( r, g, b ); 2598 case PF_DITHER: 2599 { 2600 DITHER_SETUP; 2601 return DITHER( x, y, r, g, b ); 2602 } 2603 case PF_1BIT: 2604 /* 382 = (3*255)/2 */ 2605 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2606 case PF_HPCR: 2607 return DITHER_HPCR(x, y, r, g, b); 2608 case PF_LOOKUP: 2609 { 2610 LOOKUP_SETUP; 2611 return LOOKUP( r, g, b ); 2612 } 2613 case PF_GRAYSCALE: 2614 return GRAY_RGB( r, g, b ); 2615 case PF_DITHER_5R6G5B: 2616 /* fall through */ 2617 case PF_TRUEDITHER: 2618 { 2619 unsigned long p; 2620 PACK_TRUEDITHER(p, x, y, r, g, b); 2621 return p; 2622 } 2623 default: 2624 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2625 } 2626 return 0; 2627} 2628 2629 2630/* 2631 * This is typically called when the window size changes and we need 2632 * to reallocate the buffer's back/depth/stencil/accum buffers. 2633 */ 2634void XMesaResizeBuffers( XMesaBuffer b ) 2635{ 2636 xmesa_resize_buffers( &(b->mesa_buffer) ); 2637 2638} 2639 2640