xm_api.c revision 9ac7182ec4558cb0c3a6481c72732f05feb50a60
1/* $Id: xm_api.c,v 1.31 2002/02/15 19:15:33 brianp Exp $ */ 2 3/* 4 * Mesa 3-D graphics library 5 * Version: 4.1 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 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 if (getenv("MESA_DEBUG")) 172 fprintf( stderr, "X/Mesa error: %s\n", msg ); 173} 174 175 176/* 177 * Return the host's byte order as LSBFirst or MSBFirst ala X. 178 */ 179#ifndef XFree86Server 180static int host_byte_order( void ) 181{ 182 int i = 1; 183 char *cptr = (char *) &i; 184 return (*cptr==1) ? LSBFirst : MSBFirst; 185} 186#endif 187 188 189/* 190 * Error handling. 191 */ 192#ifndef XFree86Server 193static int mesaXErrorFlag = 0; 194 195static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 196{ 197 (void) dpy; 198 (void) event; 199 mesaXErrorFlag = 1; 200 return 0; 201} 202#endif 203 204 205/* 206 * Check if the X Shared Memory extension is available. 207 * Return: 0 = not available 208 * 1 = shared XImage support available 209 * 2 = shared Pixmap support available also 210 */ 211#ifndef XFree86Server 212static int check_for_xshm( XMesaDisplay *display ) 213{ 214#ifdef USE_XSHM 215 int major, minor, ignore; 216 Bool pixmaps; 217 218 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 219 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 220 return (pixmaps==True) ? 2 : 1; 221 } 222 else { 223 return 0; 224 } 225 } 226 else { 227 return 0; 228 } 229#else 230 /* Can't compile XSHM support */ 231 return 0; 232#endif 233} 234#endif 235 236 237/* 238 * Return the width and height of the given drawable. 239 */ 240static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 241 unsigned int *width, unsigned int *height) 242{ 243#ifdef XFree86Server 244 (void) dpy; 245 *width = d->width; 246 *height = d->height; 247#else 248 Window root; 249 int x, y; 250 unsigned int bw, depth; 251 252 _glthread_LOCK_MUTEX(_xmesa_lock); 253 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 254 _glthread_UNLOCK_MUTEX(_xmesa_lock); 255#endif 256} 257 258 259/* 260 * Apply gamma correction to an intensity value in [0..max]. Return the 261 * new intensity value. 262 */ 263static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 264{ 265 if (gamma == 1.0) { 266 return value; 267 } 268 else { 269 double x = (double) value / (double) max; 270 return IROUND_POS((GLfloat) max * pow(x, 1.0F/gamma)); 271 } 272} 273 274 275 276/* 277 * Return the true number of bits per pixel for XImages. 278 * For example, if we request a 24-bit deep visual we may actually need/get 279 * 32bpp XImages. This function returns the appropriate bpp. 280 * Input: dpy - the X display 281 * visinfo - desribes the visual to be used for XImages 282 * Return: true number of bits per pixel for XImages 283 */ 284#define GET_BITS_PER_PIXEL(xmv) bits_per_pixel(xmv) 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 = GET_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 /* 1702 * XXX This code should really go away because the ancilliary data 1703 * associated with a window/pixmap should not go away just because 1704 * a context is destroyed. 1705 */ 1706#if 0 1707 /* Destroy any buffers which are using this context. If we don't 1708 * we may have dangling references. Hmm, maybe we should just 1709 * set the buffer's context pointer to NULL instead of deleting it? 1710 * Let's see if we get any bug reports... 1711 * This contributed by Doug Rabson <dfr@calcaphon.com> 1712 */ 1713 { 1714 XMesaBuffer b, next; 1715 for (b = XMesaBufferList; b; b = next) { 1716 next = b->Next; 1717 if (!b->pixmap_flag) { 1718#ifndef XFree86Server 1719 XSync(b->display, False); 1720#endif 1721 if (b->xm_context == c) { 1722 /* found a context created for this context */ 1723 XMesaDestroyBuffer( b ); 1724 } 1725 } 1726 } 1727 } 1728#endif 1729 1730 FREE( c ); 1731} 1732 1733 1734 1735/* 1736 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1737 * Create a new XMesaBuffer from an X window. 1738 * Input: v - the XMesaVisual 1739 * w - the window 1740 * c - the context 1741 * Return: new XMesaBuffer or NULL if error 1742 */ 1743XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1744 XMesaContext c ) 1745{ 1746#ifndef XFree86Server 1747 XWindowAttributes attr; 1748#endif 1749#ifdef FX 1750 char *fxEnvVar; 1751#endif 1752 int client = 0; 1753 1754 XMesaBuffer b = alloc_xmesa_buffer(); 1755 if (!b) { 1756 return NULL; 1757 } 1758 1759 (void) c; 1760 1761#ifdef XFree86Server 1762 client = CLIENT_ID(((XMesaDrawable)w)->id); 1763#endif 1764 1765 assert(v); 1766 1767#ifdef XFree86Server 1768 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1769#else 1770 XGetWindowAttributes( v->display, w, &attr ); 1771 1772 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1773#endif 1774 if (getenv("MESA_DEBUG")) { 1775 fprintf(stderr, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1776 } 1777 return NULL; 1778 } 1779 1780 b->xm_context = NULL; /* Associate no context with this buffer */ 1781 1782 b->xm_visual = v; 1783 b->pixmap_flag = GL_FALSE; 1784 b->display = v->display; 1785#ifdef XFree86Server 1786 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1787#else 1788 if (attr.colormap) { 1789 b->cmap = attr.colormap; 1790 } 1791 else { 1792 if (getenv("MESA_DEBUG")) { 1793 fprintf(stderr, "Window %u has no colormap!\n", (unsigned int) w); 1794 } 1795 /* this is weird, a window w/out a colormap!? */ 1796 /* OK, let's just allocate a new one and hope for the best */ 1797 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1798 } 1799#endif 1800 1801 /* determine back buffer implementation */ 1802 if (v->mesa_visual.doubleBufferMode) { 1803 if (v->ximage_flag) { 1804 b->db_state = BACK_XIMAGE; 1805 } 1806 else { 1807 b->db_state = BACK_PIXMAP; 1808 } 1809 } 1810 else { 1811 b->db_state = 0; 1812 } 1813 1814 _mesa_initialize_framebuffer(&b->mesa_buffer, 1815 &v->mesa_visual, 1816 v->mesa_visual.depthBits > 0, 1817 v->mesa_visual.stencilBits > 0, 1818 v->mesa_visual.accumRedBits > 0, 1819 v->mesa_visual.alphaBits > 0 ); 1820 1821 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1822 (XMesaDrawable)w, b->cmap )) { 1823 free_xmesa_buffer(client, b); 1824 return NULL; 1825 } 1826 1827#ifdef FX 1828 fxEnvVar = getenv("MESA_GLX_FX"); 1829 if (fxEnvVar) { 1830 if (fxEnvVar[0]!='d') { 1831 int attribs[100]; 1832 int numAttribs = 0; 1833 int hw; 1834 if (v->mesa_visual.depthBits > 0) { 1835 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1836 attribs[numAttribs++] = 1; 1837 } 1838 if (v->mesa_visual.doubleBufferMode) { 1839 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1840 } 1841 if (v->mesa_visual.accumRedBits > 0) { 1842 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1843 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1844 } 1845 if (v->mesa_visual.stencilBits > 0) { 1846 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1847 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1848 } 1849 if (v->mesa_visual.alphaBits > 0) { 1850 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1851 attribs[numAttribs++] = 1; 1852 } 1853 if (c->gl_ctx) { 1854#define FXMESA_SHARE_CONTEXT 990099 /* keep in sync with fxapi.c! */ 1855 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1856 attribs[numAttribs++] = (int) c->gl_ctx; 1857 } 1858 attribs[numAttribs++] = FXMESA_NONE; 1859 1860 if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) { 1861 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1862 if ((v->undithered_pf!=PF_INDEX) && (b->backimage)) { 1863 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1864 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1865 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1866 else 1867 b->FXwindowHack = GL_FALSE; 1868 } 1869 } 1870 else { 1871 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1872 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1873 GR_REFRESH_75Hz, attribs); 1874 else 1875 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1876 b->FXisHackUsable = GL_FALSE; 1877 b->FXwindowHack = GL_FALSE; 1878 } 1879 /* 1880 fprintf(stderr, 1881 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1882 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1883 */ 1884 } 1885 } 1886 else { 1887 fprintf(stderr,"WARNING: This Mesa Library includes the Glide driver but\n"); 1888 fprintf(stderr," you have not defined the MESA_GLX_FX env. var.\n"); 1889 fprintf(stderr," (check the README.3DFX file for more information).\n\n"); 1890 fprintf(stderr," you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1891 } 1892#endif 1893 1894 return b; 1895} 1896 1897 1898XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1899{ 1900 return XMesaCreateWindowBuffer2( v, w, NULL ); 1901} 1902 1903 1904/* 1905 * Create a new XMesaBuffer from an X pixmap. 1906 * Input: v - the XMesaVisual 1907 * p - the pixmap 1908 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor 1909 * visual for the pixmap 1910 * Return: new XMesaBuffer or NULL if error 1911 */ 1912XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1913 XMesaPixmap p, XMesaColormap cmap ) 1914{ 1915 int client = 0; 1916 XMesaBuffer b = alloc_xmesa_buffer(); 1917 if (!b) { 1918 return NULL; 1919 } 1920 1921 1922#ifdef XFree86Server 1923 client = CLIENT_ID(((XMesaDrawable)p)->id); 1924#endif 1925 1926 assert(v); 1927 1928 b->xm_context = NULL; /* Associate no context with this buffer */ 1929 1930 b->xm_visual = v; 1931 b->pixmap_flag = GL_TRUE; 1932 b->display = v->display; 1933 b->cmap = cmap; 1934 1935 /* determine back buffer implementation */ 1936 if (v->mesa_visual.doubleBufferMode) { 1937 if (v->ximage_flag) { 1938 b->db_state = BACK_XIMAGE; 1939 } 1940 else { 1941 b->db_state = BACK_PIXMAP; 1942 } 1943 } 1944 else { 1945 b->db_state = 0; 1946 } 1947 1948 _mesa_initialize_framebuffer(&b->mesa_buffer, 1949 &v->mesa_visual, 1950 v->mesa_visual.depthBits > 0, 1951 v->mesa_visual.stencilBits > 0, 1952 v->mesa_visual.accumRedBits + 1953 v->mesa_visual.accumGreenBits + 1954 v->mesa_visual.accumBlueBits > 0, 1955 v->mesa_visual.alphaBits > 0 ); 1956 1957 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1958 (XMesaDrawable)p, cmap)) { 1959 free_xmesa_buffer(client, b); 1960 return NULL; 1961 } 1962 1963 return b; 1964} 1965 1966 1967 1968#if 0 /* not done */ 1969XMesaBuffer XMesaCreatePBuffer( XMesaVisual v, XMesaColormap cmap, 1970 unsigned int width, unsigned int height ) 1971{ 1972 int client = 0; 1973 XMesaBuffer b = alloc_xmesa_buffer(); 1974 if (!b) { 1975 return NULL; 1976 } 1977 1978 b->xm_context = NULL; /* Associate no context with this buffer */ 1979 1980 b->xm_visual = v; 1981 b->pbuffer_flag = GL_TRUE; 1982 b->display = v->display; 1983 b->cmap = cmap; 1984 1985 /* determine back buffer implementation */ 1986 if (v->mesa_visual.doubleBufferMode) { 1987 if (v->ximage_flag) { 1988 b->db_state = BACK_XIMAGE; 1989 } 1990 else { 1991 b->db_state = BACK_PIXMAP; 1992 } 1993 } 1994 else { 1995 b->db_state = 0; 1996 } 1997 1998 _mesa_initialize_framebuffer(&b->mesa_buffer, 1999 &v->mesa_visual, 2000 v->mesa_visual.depthBits > 0, 2001 v->mesa_visual.stencilBits > 0, 2002 v->mesa_visual.accumRedBits + 2003 v->mesa_visual.accumGreenBits + 2004 v->mesa_visual.accumBlueBits > 0, 2005 v->mesa_visual.alphaBits > 0 ); 2006 2007 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 2008 0, cmap)) { 2009 free_xmesa_buffer(client, b); 2010 return NULL; 2011 } 2012 2013 return b; 2014} 2015#endif 2016 2017 2018 2019/* 2020 * Deallocate an XMesaBuffer structure and all related info. 2021 */ 2022void XMesaDestroyBuffer( XMesaBuffer b ) 2023{ 2024 int client = 0; 2025 2026#ifdef XFree86Server 2027 if (b->frontbuffer) 2028 client = CLIENT_ID(b->frontbuffer->id); 2029#endif 2030 2031 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 2032 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 2033 if (b->swapgc) XMesaFreeGC( b->xm_visual->display, b->swapgc ); 2034 2035 if (b->backimage) { 2036#if defined(USE_XSHM) && !defined(XFree86Server) 2037 if (b->shm) { 2038 XShmDetach( b->xm_visual->display, &b->shminfo ); 2039 XDestroyImage( b->backimage ); 2040 shmdt( b->shminfo.shmaddr ); 2041 } 2042 else 2043#endif 2044 XMesaDestroyImage( b->backimage ); 2045 } 2046 if (b->backpixmap) { 2047 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 2048 if (b->xm_visual->hpcr_clear_flag) { 2049 XMesaFreePixmap( b->xm_visual->display, 2050 b->xm_visual->hpcr_clear_pixmap ); 2051 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 2052 } 2053 } 2054 if (b->rowimage) { 2055 FREE( b->rowimage->data ); 2056 b->rowimage->data = NULL; 2057 XMesaDestroyImage( b->rowimage ); 2058 } 2059 2060 if (b->xm_context) 2061 b->xm_context->xm_buffer = NULL; 2062 2063 free_xmesa_buffer(client, b); 2064} 2065 2066 2067 2068/* 2069 * Bind buffer b to context c and make c the current rendering context. 2070 */ 2071GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2072{ 2073 return XMesaMakeCurrent2( c, b, b ); 2074} 2075 2076 2077/* 2078 * Bind buffer b to context c and make c the current rendering context. 2079 */ 2080GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2081 XMesaBuffer readBuffer ) 2082{ 2083 if (c) { 2084 if (!drawBuffer || !readBuffer) 2085 return GL_FALSE; /* must specify buffers! */ 2086 2087#ifdef FX 2088 if (drawBuffer->FXctx) { 2089 fxMesaMakeCurrent(drawBuffer->FXctx); 2090 2091 /* Disassociate drawBuffer's current context from drawBuffer */ 2092 if (drawBuffer->xm_context) 2093 drawBuffer->xm_context->xm_buffer = NULL; 2094 2095 /* Disassociate old buffer from this context */ 2096 if (c->xm_buffer) 2097 c->xm_buffer->xm_context = NULL; 2098 2099 /* Associate the context with this buffer */ 2100 drawBuffer->xm_context = c; 2101 2102 c->xm_buffer = drawBuffer; 2103 c->xm_read_buffer = readBuffer; 2104 c->use_read_buffer = (drawBuffer != readBuffer); 2105 2106 return GL_TRUE; 2107 } 2108#endif 2109 if (c->gl_ctx == _mesa_get_current_context() 2110 && c->xm_buffer == drawBuffer 2111 && c->xm_read_buffer == readBuffer 2112 && c->xm_buffer->wasCurrent) { 2113 /* same context and buffer, do nothing */ 2114 return GL_TRUE; 2115 } 2116 2117 /* Disassociate drawBuffer's current context from drawBuffer */ 2118 if (drawBuffer->xm_context) 2119 drawBuffer->xm_context->xm_buffer = NULL; 2120 2121 /* Disassociate old buffer with this context */ 2122 if (c->xm_buffer) 2123 c->xm_buffer->xm_context = NULL; 2124 2125 drawBuffer->xm_context = c; /* Associate the context with this buffer */ 2126 2127 c->xm_buffer = drawBuffer; 2128 c->xm_read_buffer = readBuffer; 2129 c->use_read_buffer = (drawBuffer != readBuffer); 2130 2131 _mesa_make_current2(c->gl_ctx, 2132 &drawBuffer->mesa_buffer, 2133 &readBuffer->mesa_buffer); 2134 2135 if (c->gl_ctx->Viewport.Width == 0) { 2136 /* initialize viewport to window size */ 2137 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2138 c->gl_ctx->Scissor.Width = drawBuffer->width; 2139 c->gl_ctx->Scissor.Height = drawBuffer->height; 2140 } 2141 2142 if (c->xm_visual->mesa_visual.rgbMode) { 2143 /* 2144 * Must recompute and set these pixel values because colormap 2145 * can be different for different windows. 2146 */ 2147 c->clearpixel = xmesa_color_to_pixel( c, 2148 c->clearcolor[0], 2149 c->clearcolor[1], 2150 c->clearcolor[2], 2151 c->clearcolor[3], 2152 c->xm_visual->undithered_pf); 2153 XMesaSetForeground(c->display, c->xm_buffer->cleargc, c->clearpixel); 2154 } 2155 2156 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2157 c->xm_buffer->wasCurrent = GL_TRUE; 2158 } 2159 else { 2160 /* Detach */ 2161 _mesa_make_current2( NULL, NULL, NULL ); 2162 } 2163 return GL_TRUE; 2164} 2165 2166 2167/* 2168 * Unbind the context c from its buffer. 2169 */ 2170GLboolean XMesaUnbindContext( XMesaContext c ) 2171{ 2172 /* A no-op for XFree86 integration purposes */ 2173 return GL_TRUE; 2174} 2175 2176 2177XMesaContext XMesaGetCurrentContext( void ) 2178{ 2179 GET_CURRENT_CONTEXT(ctx); 2180 if (ctx) { 2181 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2182 return xmesa; 2183 } 2184 else { 2185 return 0; 2186 } 2187} 2188 2189 2190XMesaBuffer XMesaGetCurrentBuffer( void ) 2191{ 2192 GET_CURRENT_CONTEXT(ctx); 2193 if (ctx) { 2194 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2195 return xmesa->xm_buffer; 2196 } 2197 else { 2198 return 0; 2199 } 2200} 2201 2202 2203/* New in Mesa 3.1 */ 2204XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2205{ 2206 GET_CURRENT_CONTEXT(ctx); 2207 if (ctx) { 2208 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2209 return xmesa->xm_buffer; 2210 } 2211 else { 2212 return 0; 2213 } 2214} 2215 2216 2217GLboolean XMesaForceCurrent(XMesaContext c) 2218{ 2219 if (c) { 2220 if (c->gl_ctx != _mesa_get_current_context()) { 2221 _mesa_make_current(c->gl_ctx, &c->xm_buffer->mesa_buffer); 2222 } 2223 } 2224 else { 2225 _mesa_make_current(NULL, NULL); 2226 } 2227 return GL_TRUE; 2228} 2229 2230 2231GLboolean XMesaLoseCurrent(XMesaContext c) 2232{ 2233 (void) c; 2234 _mesa_make_current(NULL, NULL); 2235 return GL_TRUE; 2236} 2237 2238 2239/* 2240 * Switch 3Dfx support hack between window and full-screen mode. 2241 */ 2242GLboolean XMesaSetFXmode( GLint mode ) 2243{ 2244#ifdef FX 2245 const char *fx = getenv("MESA_GLX_FX"); 2246 if (fx && fx[0] != 'd') { 2247 GET_CURRENT_CONTEXT(ctx); 2248 GrHwConfiguration hw; 2249 if (!FX_grSstQueryHardware(&hw)) { 2250 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2251 return GL_FALSE; 2252 } 2253 if (hw.num_sst < 1) { 2254 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2255 return GL_FALSE; 2256 } 2257 if (ctx) { 2258 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2259 if (mode == XMESA_FX_WINDOW) { 2260 if (xmesa->xm_buffer->FXisHackUsable) { 2261 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2262 xmesa->xm_buffer->FXwindowHack = GL_TRUE; 2263 return GL_TRUE; 2264 } 2265 } 2266 else if (mode == XMESA_FX_FULLSCREEN) { 2267 FX_grSstControl(GR_CONTROL_ACTIVATE); 2268 xmesa->xm_buffer->FXwindowHack = GL_FALSE; 2269 return GL_TRUE; 2270 } 2271 else { 2272 /* Error: Bad mode value */ 2273 } 2274 } 2275 } 2276 /*fprintf(stderr, "fallthrough\n");*/ 2277#else 2278 (void) mode; 2279#endif 2280 return GL_FALSE; 2281} 2282 2283 2284 2285#ifdef FX 2286/* 2287 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2288 */ 2289static void FXgetImage( XMesaBuffer b ) 2290{ 2291 static unsigned short pixbuf[MAX_WIDTH]; 2292 GLuint x, y; 2293 int xpos, ypos; 2294 XMesaWindow root; 2295 unsigned int bw, depth, width, height; 2296 XMesaContext xmesa = (XMesaContext) b->xm_context->gl_ctx->DriverCtx; 2297 2298 assert(xmesa->xm_buffer->FXctx); 2299 2300#ifdef XFree86Server 2301 x = b->frontbuffer->x; 2302 y = b->frontbuffer->y; 2303 width = b->frontbuffer->width; 2304 height = b->frontbuffer->height; 2305 depth = b->frontbuffer->depth; 2306#else 2307 XGetGeometry( xmesa->xm_visual->display, b->frontbuffer, 2308 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2309#endif 2310 if (b->width != width || b->height != height) { 2311 b->width = MIN2((int)width, xmesa->xm_buffer->FXctx->width); 2312 b->height = MIN2((int)height, xmesa->xm_buffer->FXctx->height); 2313 if (b->width & 1) 2314 b->width--; /* prevent odd width */ 2315 xmesa_alloc_back_buffer( b ); 2316 } 2317 2318 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2319 if (xmesa->xm_visual->undithered_pf==PF_5R6G5B) { 2320 /* Special case: 16bpp RGB */ 2321 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2322 0, xmesa->xm_buffer->FXctx->height - b->height, /*pos*/ 2323 b->width, b->height, /* size */ 2324 b->width * sizeof(GLushort), /* stride */ 2325 b->backimage->data); /* dest buffer */ 2326 } 2327 else if (xmesa->xm_visual->dithered_pf==PF_DITHER 2328 && GET_VISUAL_DEPTH(xmesa->xm_visual)==8) { 2329 /* Special case: 8bpp RGB */ 2330 for (y=0;y<b->height;y++) { 2331 GLubyte *ptr = (GLubyte*) xmesa->xm_buffer->backimage->data 2332 + xmesa->xm_buffer->backimage->bytes_per_line * y; 2333 XDITHER_SETUP(y); 2334 2335 /* read row from 3Dfx frame buffer */ 2336 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2337 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2338 b->width, 1, 2339 0, 2340 pixbuf ); 2341 2342 /* write to XImage back buffer */ 2343 for (x=0;x<b->width;x++) { 2344 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2345 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2346 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2347 *ptr++ = XDITHER( x, r, g, b); 2348 } 2349 } 2350 } 2351 else { 2352 /* General case: slow! */ 2353 for (y=0;y<b->height;y++) { 2354 /* read row from 3Dfx frame buffer */ 2355 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2356 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2357 b->width, 1, 2358 0, 2359 pixbuf ); 2360 2361 /* write to XImage back buffer */ 2362 for (x=0;x<b->width;x++) { 2363 XMesaPutPixel(b->backimage,x,y, 2364 xmesa_color_to_pixel(xmesa, 2365 (pixbuf[x] & 0xf800) >> 8, 2366 (pixbuf[x] & 0x07e0) >> 3, 2367 (pixbuf[x] & 0x001f) << 3, 2368 0xff, xmesa->pixelformat)); 2369 } 2370 } 2371 } 2372 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2373} 2374#endif 2375 2376 2377/* 2378 * Copy the back buffer to the front buffer. If there's no back buffer 2379 * this is a no-op. 2380 */ 2381void XMesaSwapBuffers( XMesaBuffer b ) 2382{ 2383 GET_CURRENT_CONTEXT(ctx); 2384 2385 /* If we're swapping the buffer associated with the current context 2386 * we have to flush any pending rendering commands first. 2387 */ 2388 if (b->xm_context && b->xm_context->gl_ctx == ctx) 2389 _mesa_swapbuffers(ctx); 2390 2391 if (b->db_state) { 2392#ifdef FX 2393 if (b->FXctx) { 2394 fxMesaSwapBuffers(); 2395 2396 if (b->FXwindowHack) 2397 FXgetImage(b); 2398 else 2399 return; 2400 } 2401#endif 2402 if (b->backimage) { 2403 /* Copy Ximage from host's memory to server's window */ 2404#if defined(USE_XSHM) && !defined(XFree86Server) 2405 if (b->shm) { 2406 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2407 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2408 b->swapgc, 2409 b->backimage, 0, 0, 2410 0, 0, b->width, b->height, False ); 2411 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2412 } 2413 else 2414#endif 2415 { 2416 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2417 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2418 b->swapgc, 2419 b->backimage, 0, 0, 2420 0, 0, b->width, b->height ); 2421 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2422 } 2423 } 2424 else { 2425 /* Copy pixmap to window on server */ 2426 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2427 XMesaCopyArea( b->xm_visual->display, 2428 b->backpixmap, /* source drawable */ 2429 b->frontbuffer, /* dest. drawable */ 2430 b->swapgc, 2431 0, 0, b->width, b->height, /* source region */ 2432 0, 0 /* dest region */ 2433 ); 2434 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2435 } 2436 } 2437#if !defined(XFree86Server) 2438 XSync( b->xm_visual->display, False ); 2439#endif 2440} 2441 2442 2443 2444/* 2445 * Copy sub-region of back buffer to front buffer 2446 */ 2447void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2448{ 2449 GET_CURRENT_CONTEXT(ctx); 2450 2451 /* If we're swapping the buffer associated with the current context 2452 * we have to flush any pending rendering commands first. 2453 */ 2454 if (b->xm_context->gl_ctx == ctx) 2455 _mesa_swapbuffers(ctx); 2456 2457 if (b->db_state) { 2458 int yTop = b->height - y - height; 2459#ifdef FX 2460 if (b->FXctx) { 2461 fxMesaSwapBuffers(); 2462 if (b->FXwindowHack) 2463 FXgetImage(b); 2464 else 2465 return; 2466 } 2467#endif 2468 if (b->backimage) { 2469 /* Copy Ximage from host's memory to server's window */ 2470#if defined(USE_XSHM) && !defined(XFree86Server) 2471 if (b->shm) { 2472 /* XXX assuming width and height aren't too large! */ 2473 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2474 b->swapgc, 2475 b->backimage, x, yTop, 2476 x, yTop, width, height, False ); 2477 /* wait for finished event??? */ 2478 } 2479 else 2480#endif 2481 { 2482 /* XXX assuming width and height aren't too large! */ 2483 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2484 b->swapgc, 2485 b->backimage, x, yTop, 2486 x, yTop, width, height ); 2487 } 2488 } 2489 else { 2490 /* Copy pixmap to window on server */ 2491 XMesaCopyArea( b->xm_visual->display, 2492 b->backpixmap, /* source drawable */ 2493 b->frontbuffer, /* dest. drawable */ 2494 b->swapgc, 2495 x, yTop, width, height, /* source region */ 2496 x, yTop /* dest region */ 2497 ); 2498 } 2499 } 2500} 2501 2502 2503/* 2504 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2505 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2506 * back buffer directly. 2507 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2508 * ximage - pointer to back buffer's XImage, or NULL 2509 * Return: GL_TRUE = context is double buffered 2510 * GL_FALSE = context is single buffered 2511 */ 2512GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2513 XMesaPixmap *pixmap, 2514 XMesaImage **ximage ) 2515{ 2516 if (b->db_state) { 2517 if (pixmap) *pixmap = b->backpixmap; 2518 if (ximage) *ximage = b->backimage; 2519 return GL_TRUE; 2520 } 2521 else { 2522 *pixmap = 0; 2523 *ximage = NULL; 2524 return GL_FALSE; 2525 } 2526} 2527 2528 2529/* 2530 * Return the depth buffer associated with an XMesaBuffer. 2531 * Input: b - the XMesa buffer handle 2532 * Output: width, height - size of buffer in pixels 2533 * bytesPerValue - bytes per depth value (2 or 4) 2534 * buffer - pointer to depth buffer values 2535 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2536 */ 2537GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2538 GLint *bytesPerValue, void **buffer ) 2539{ 2540 if (!b->mesa_buffer.DepthBuffer) { 2541 *width = 0; 2542 *height = 0; 2543 *bytesPerValue = 0; 2544 *buffer = 0; 2545 return GL_FALSE; 2546 } 2547 else { 2548 *width = b->mesa_buffer.Width; 2549 *height = b->mesa_buffer.Height; 2550 *bytesPerValue = sizeof(GLdepth); 2551 *buffer = b->mesa_buffer.DepthBuffer; 2552 return GL_TRUE; 2553 } 2554} 2555 2556 2557void XMesaFlush( XMesaContext c ) 2558{ 2559 if (c && c->xm_visual) { 2560#ifdef XFree86Server 2561 /* NOT_NEEDED */ 2562#else 2563 XSync( c->xm_visual->display, False ); 2564#endif 2565 } 2566} 2567 2568 2569 2570const char *XMesaGetString( XMesaContext c, int name ) 2571{ 2572 (void) c; 2573 if (name==XMESA_VERSION) { 2574 return "3.5"; 2575 } 2576 else if (name==XMESA_EXTENSIONS) { 2577 return ""; 2578 } 2579 else { 2580 return NULL; 2581 } 2582} 2583 2584 2585 2586XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2587{ 2588 XMesaBuffer b; 2589 for (b=XMesaBufferList; b; b=b->Next) { 2590 if (b->frontbuffer==d && b->display==dpy) { 2591 return b; 2592 } 2593 } 2594 return NULL; 2595} 2596 2597 2598 2599/* 2600 * Look for XMesaBuffers whose X window has been destroyed. 2601 * Deallocate any such XMesaBuffers. 2602 */ 2603void XMesaGarbageCollect( void ) 2604{ 2605 XMesaBuffer b, next; 2606 for (b=XMesaBufferList; b; b=next) { 2607 next = b->Next; 2608 if (!b->pixmap_flag) { 2609#ifdef XFree86Server 2610 /* NOT_NEEDED */ 2611#else 2612 XSync(b->display, False); 2613 if (!window_exists( b->display, b->frontbuffer )) { 2614 /* found a dead window, free the ancillary info */ 2615 XMesaDestroyBuffer( b ); 2616 } 2617#endif 2618 } 2619 } 2620} 2621 2622 2623void XMesaReset( void ) 2624{ 2625 while (XMesaBufferList) 2626 XMesaDestroyBuffer(XMesaBufferList); 2627 2628 XMesaBufferList = NULL; 2629} 2630 2631 2632unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2633 GLfloat red, GLfloat green, 2634 GLfloat blue, GLfloat alpha ) 2635{ 2636 GLint r = (GLint) (red * 255.0F); 2637 GLint g = (GLint) (green * 255.0F); 2638 GLint b = (GLint) (blue * 255.0F); 2639 GLint a = (GLint) (alpha * 255.0F); 2640 2641 switch (xmesa->pixelformat) { 2642 case PF_INDEX: 2643 return 0; 2644 case PF_TRUECOLOR: 2645 { 2646 unsigned long p; 2647 PACK_TRUECOLOR( p, r, g, b ); 2648 return p; 2649 } 2650 case PF_8A8B8G8R: 2651 return PACK_8A8B8G8R( r, g, b, a ); 2652 case PF_8R8G8B: 2653 return PACK_8R8G8B( r, g, b ); 2654 case PF_5R6G5B: 2655 return PACK_5R6G5B( r, g, b ); 2656 case PF_DITHER: 2657 { 2658 DITHER_SETUP; 2659 return DITHER( x, y, r, g, b ); 2660 } 2661 case PF_1BIT: 2662 /* 382 = (3*255)/2 */ 2663 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2664 case PF_HPCR: 2665 return DITHER_HPCR(x, y, r, g, b); 2666 case PF_LOOKUP: 2667 { 2668 LOOKUP_SETUP; 2669 return LOOKUP( r, g, b ); 2670 } 2671 case PF_GRAYSCALE: 2672 return GRAY_RGB( r, g, b ); 2673 case PF_DITHER_5R6G5B: 2674 /* fall through */ 2675 case PF_TRUEDITHER: 2676 { 2677 unsigned long p; 2678 PACK_TRUEDITHER(p, x, y, r, g, b); 2679 return p; 2680 } 2681 default: 2682 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2683 } 2684 return 0; 2685} 2686 2687 2688