xm_api.c revision 9bed64cbf193e87e0dba46edf5cfaec267b0d8e6
1/* $Id: xm_api.c,v 1.27 2001/08/31 04:30:14 brianp Exp $ */ 2 3/* 4 * Mesa 3-D graphics library 5 * Version: 3.5 6 * 7 * Copyright (C) 1999-2000 Brian Paul All Rights Reserved. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included 17 * in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 */ 26 27 28/* 29 * This file contains the implementations of all the XMesa* functions. 30 * 31 * 32 * NOTES: 33 * 34 * The window coordinate system origin (0,0) is in the lower-left corner 35 * of the window. X11's window coordinate origin is in the upper-left 36 * corner of the window. Therefore, most drawing functions in this 37 * file have to flip Y coordinates. 38 * 39 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 40 * in support for the MIT Shared Memory extension. If enabled, when you 41 * use an Ximage for the back buffer in double buffered mode, the "swap" 42 * operation will be faster. You must also link with -lXext. 43 * 44 * Byte swapping: If the Mesa host and the X display use a different 45 * byte order then there's some trickiness to be aware of when using 46 * XImages. The byte ordering used for the XImage is that of the X 47 * display, not the Mesa host. 48 * The color-to-pixel encoding for True/DirectColor must be done 49 * according to the display's visual red_mask, green_mask, and blue_mask. 50 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 51 * do byte swapping if needed. If one wants to directly "poke" the pixel 52 * into the XImage's buffer then the pixel must be byte swapped first. In 53 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 54 * and use XPutPixel everywhere except in the implementation of 55 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 56 * instead of using XPutPixel we "poke" our values after byte-swapping 57 * the clear pixel value if needed. 58 * 59 */ 60 61#ifdef __CYGWIN__ 62#undef WIN32 63#undef __WIN32__ 64#endif 65 66#include "glxheader.h" 67#include "GL/xmesa.h" 68#include "xmesaP.h" 69#include "context.h" 70#include "extensions.h" 71#include "glthread.h" 72#include "matrix.h" 73#include "mem.h" 74#include "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 XMesaWindow window, XMesaColormap cmap ) 1034{ 1035 unsigned long rmask, gmask, bmask; 1036 (void) buffer; 1037 (void) window; 1038 (void) cmap; 1039 1040 /* Compute red multiplier (mask) and bit shift */ 1041 v->rshift = 0; 1042 rmask = GET_REDMASK(v); 1043 while ((rmask & 1)==0) { 1044 v->rshift++; 1045 rmask = rmask >> 1; 1046 } 1047 1048 /* Compute green multiplier (mask) and bit shift */ 1049 v->gshift = 0; 1050 gmask = GET_GREENMASK(v); 1051 while ((gmask & 1)==0) { 1052 v->gshift++; 1053 gmask = gmask >> 1; 1054 } 1055 1056 /* Compute blue multiplier (mask) and bit shift */ 1057 v->bshift = 0; 1058 bmask = GET_BLUEMASK(v); 1059 while ((bmask & 1)==0) { 1060 v->bshift++; 1061 bmask = bmask >> 1; 1062 } 1063 1064 /* 1065 * Compute component-to-pixel lookup tables and dithering kernel 1066 */ 1067 { 1068 static GLubyte kernel[16] = { 1069 0*16, 8*16, 2*16, 10*16, 1070 12*16, 4*16, 14*16, 6*16, 1071 3*16, 11*16, 1*16, 9*16, 1072 15*16, 7*16, 13*16, 5*16, 1073 }; 1074 GLint rBits = bitcount(rmask); 1075 GLint gBits = bitcount(gmask); 1076 GLint bBits = bitcount(bmask); 1077 GLint maxBits; 1078 GLuint i; 1079 1080 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1081 for (i=0; i<=rmask; i++) 1082 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1083 for (i=0; i<=gmask; i++) 1084 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1085 for (i=0; i<=bmask; i++) 1086 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1087 1088 /* convert RGB values from [0,255] to pixel components */ 1089 1090 for (i=0;i<256;i++) { 1091 GLint r = gamma_adjust(v->RedGamma, i, 255); 1092 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1093 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1094 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1095 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1096 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1097 } 1098 /* overflow protection */ 1099 for (i=256;i<512;i++) { 1100 v->RtoPixel[i] = v->RtoPixel[255]; 1101 v->GtoPixel[i] = v->GtoPixel[255]; 1102 v->BtoPixel[i] = v->BtoPixel[255]; 1103 } 1104 1105 /* setup dithering kernel */ 1106 maxBits = rBits; 1107 if (gBits > maxBits) maxBits = gBits; 1108 if (bBits > maxBits) maxBits = bBits; 1109 for (i=0;i<16;i++) { 1110 v->Kernel[i] = kernel[i] >> maxBits; 1111 } 1112 1113 v->undithered_pf = PF_TRUECOLOR; 1114 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_TRUEDITHER : PF_TRUECOLOR; 1115 } 1116 1117 /* 1118 * Now check for TrueColor visuals which we can optimize. 1119 */ 1120 if ( GET_REDMASK(v) ==0x0000ff 1121 && GET_GREENMASK(v)==0x00ff00 1122 && GET_BLUEMASK(v) ==0xff0000 1123 && CHECK_BYTE_ORDER(v) 1124 && v->BitsPerPixel==32 1125 && sizeof(GLuint)==4 1126 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1127 /* common 32 bpp config used on SGI, Sun */ 1128 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1129 } 1130 else if (GET_REDMASK(v) ==0xff0000 1131 && GET_GREENMASK(v)==0x00ff00 1132 && GET_BLUEMASK(v) ==0x0000ff 1133 && CHECK_BYTE_ORDER(v) 1134 && v->BitsPerPixel==32 1135 && sizeof(GLuint)==4 1136 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1137 /* common 32 bpp config used on Linux, HP, IBM */ 1138 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1139 } 1140 else if (GET_REDMASK(v) ==0xff0000 1141 && GET_GREENMASK(v)==0x00ff00 1142 && GET_BLUEMASK(v) ==0x0000ff 1143 && CHECK_BYTE_ORDER(v) 1144 && v->BitsPerPixel==24 1145 && sizeof(GLuint)==4 1146 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1147 /* common packed 24 bpp config used on Linux */ 1148 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1149 } 1150 else if (GET_REDMASK(v) ==0xf800 1151 && GET_GREENMASK(v)==0x07e0 1152 && GET_BLUEMASK(v) ==0x001f 1153 && CHECK_BYTE_ORDER(v) 1154 && v->BitsPerPixel==16 1155 && sizeof(GLushort)==2 1156 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1157 /* 5-6-5 color weight on common PC VGA boards */ 1158 v->undithered_pf = PF_5R6G5B; 1159 v->dithered_pf = PF_DITHER_5R6G5B; 1160 } 1161 else if (GET_REDMASK(v) ==0xe0 1162 && GET_GREENMASK(v)==0x1c 1163 && GET_BLUEMASK(v) ==0x03 1164 && CHECK_FOR_HPCR(v)) { 1165 setup_8bit_hpcr( v ); 1166 } 1167} 1168 1169 1170 1171/* 1172 * Setup RGB rendering for a window with a monochrome visual. 1173 */ 1174static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1175{ 1176 (void) b; 1177 v->dithered_pf = v->undithered_pf = PF_1BIT; 1178 /* if black=1 then we must flip pixel values */ 1179 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1180} 1181 1182 1183 1184/* 1185 * When a context is "made current" for the first time, we can finally 1186 * finish initializing the context's visual and buffer information. 1187 * Input: v - the XMesaVisual to initialize 1188 * b - the XMesaBuffer to initialize (may be NULL) 1189 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1190 * window - the window/pixmap we're rendering into 1191 * cmap - the colormap associated with the window/pixmap 1192 * Return: GL_TRUE=success, GL_FALSE=failure 1193 */ 1194static GLboolean initialize_visual_and_buffer( int client, 1195 XMesaVisual v, 1196 XMesaBuffer b, 1197 GLboolean rgb_flag, 1198 XMesaDrawable window, 1199 XMesaColormap cmap 1200 ) 1201{ 1202#ifndef XFree86Server 1203 XGCValues gcvalues; 1204#endif 1205 1206 if (b) { 1207 assert(b->xm_visual == v); 1208 } 1209 1210 /* Save true bits/pixel */ 1211 v->BitsPerPixel = GET_BITS_PER_PIXEL(v); 1212 assert(v->BitsPerPixel > 0); 1213 1214 1215 if (rgb_flag==GL_FALSE) { 1216 /* COLOR-INDEXED WINDOW: 1217 * Even if the visual is TrueColor or DirectColor we treat it as 1218 * being color indexed. This is weird but might be useful to someone. 1219 */ 1220 v->dithered_pf = v->undithered_pf = PF_INDEX; 1221 v->index_bits = GET_VISUAL_DEPTH(v); 1222 } 1223 else { 1224 /* RGB WINDOW: 1225 * We support RGB rendering into almost any kind of visual. 1226 */ 1227 int xclass; 1228 xclass = GET_VISUAL_CLASS(v); 1229 if (xclass==TrueColor || xclass==DirectColor) { 1230 setup_truecolor( v, b, (XMesaWindow)window, cmap ); 1231 } 1232 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { 1233 setup_monochrome( v, b ); 1234 } 1235 else if (xclass==GrayScale || xclass==StaticGray) { 1236 if (!setup_grayscale( client, v, b, cmap )) { 1237 return GL_FALSE; 1238 } 1239 } 1240 else if ((xclass==PseudoColor || xclass==StaticColor) 1241 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1242 if (!setup_dithered_color( client, v, b, cmap )) { 1243 return GL_FALSE; 1244 } 1245 } 1246 else { 1247 error("XMesa: RGB mode rendering not supported in given visual."); 1248 return GL_FALSE; 1249 } 1250 v->index_bits = 0; 1251 1252 if (getenv("MESA_NO_DITHER")) { 1253 v->dithered_pf = v->undithered_pf; 1254 } 1255 } 1256 1257 1258 /* 1259 * If MESA_INFO env var is set print out some debugging info 1260 * which can help Brian figure out what's going on when a user 1261 * reports bugs. 1262 */ 1263 if (getenv("MESA_INFO")) { 1264 fprintf(stderr, "X/Mesa visual = %p\n", v); 1265 fprintf(stderr, "X/Mesa dithered pf = %u\n", v->dithered_pf); 1266 fprintf(stderr, "X/Mesa undithered pf = %u\n", v->undithered_pf); 1267 fprintf(stderr, "X/Mesa level = %d\n", v->level); 1268 fprintf(stderr, "X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1269 fprintf(stderr, "X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1270 } 1271 1272 if (b && window) { 1273 /* Do window-specific initializations */ 1274 1275 /* Window dimensions */ 1276 unsigned int w, h; 1277 get_drawable_size( v->display, window, &w, &h ); 1278 b->width = w; 1279 b->height = h; 1280 1281 b->frontbuffer = window; 1282 1283 /* Setup for single/double buffering */ 1284 if (v->mesa_visual.doubleBufferMode) { 1285 /* Double buffered */ 1286#ifndef XFree86Server 1287 b->shm = check_for_xshm( v->display ); 1288#endif 1289 xmesa_alloc_back_buffer( b ); 1290 if (b->db_state==BACK_PIXMAP) { 1291 b->buffer = (XMesaDrawable)b->backpixmap; 1292 } 1293 else { 1294 b->buffer = XIMAGE; 1295 } 1296 } 1297 else { 1298 /* Single Buffered */ 1299 b->buffer = b->frontbuffer; 1300 } 1301 1302 /* X11 graphics contexts */ 1303#ifdef XFree86Server 1304 b->gc = CreateScratchGC(v->display, window->depth); 1305#else 1306 b->gc = XCreateGC( v->display, window, 0, NULL ); 1307#endif 1308 XMesaSetFunction( v->display, b->gc, GXcopy ); 1309 1310 /* 1311 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1312 * Patch contributed by Michael Pichler May 15, 1995. 1313 */ 1314#ifdef XFree86Server 1315 b->cleargc = CreateScratchGC(v->display, window->depth); 1316 { 1317 CARD32 v[1]; 1318 v[0] = FALSE; 1319 dixChangeGC(NullClient, b->cleargc, GCGraphicsExposures, v, NULL); 1320 } 1321#else 1322 gcvalues.graphics_exposures = False; 1323 b->cleargc = XCreateGC( v->display, window, 1324 GCGraphicsExposures, &gcvalues); 1325#endif 1326 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1327 /* 1328 * Set fill style and tile pixmap once for all for HPCR stuff 1329 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1330 * Initialize whole stuff 1331 * Patch contributed by Jacques Leroy March 8, 1998. 1332 */ 1333 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1334 int i; 1335 for (i=0; i<16; i++) 1336 { 1337 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1338 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1339 } 1340 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1341 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1342 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1343 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1344 } 1345 1346 /* Initialize the row buffer XImage for use in write_color_span() */ 1347#ifdef XFree86Server 1348 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1349 (char *)MALLOC(MAX_WIDTH*4)); 1350#else 1351 b->rowimage = XCreateImage( v->display, 1352 v->visinfo->visual, 1353 v->visinfo->depth, 1354 ZPixmap, 0, /*format, offset*/ 1355 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1356 MAX_WIDTH, 1, /*width, height*/ 1357 32, /*bitmap_pad*/ 1358 0 /*bytes_per_line*/ ); 1359#endif 1360 } 1361 1362 return GL_TRUE; 1363} 1364 1365 1366 1367/* 1368 * Convert an RGBA color to a pixel value. 1369 */ 1370unsigned long 1371xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1372 GLuint pixelFormat) 1373{ 1374 switch (pixelFormat) { 1375 case PF_INDEX: 1376 return 0; 1377 case PF_TRUECOLOR: 1378 { 1379 unsigned long p; 1380 PACK_TRUECOLOR( p, r, g, b ); 1381 return p; 1382 } 1383 case PF_8A8B8G8R: 1384 return PACK_8A8B8G8R( r, g, b, a ); 1385 case PF_8R8G8B: 1386 /* fall through */ 1387 case PF_8R8G8B24: 1388 return PACK_8R8G8B( r, g, b ); 1389 case PF_5R6G5B: 1390 return PACK_5R6G5B( r, g, b ); 1391 case PF_DITHER: 1392 { 1393 DITHER_SETUP; 1394 return DITHER( 1, 0, r, g, b ); 1395 } 1396 case PF_1BIT: 1397 /* 382 = (3*255)/2 */ 1398 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1399 case PF_HPCR: 1400 return DITHER_HPCR(1, 1, r, g, b); 1401 case PF_LOOKUP: 1402 { 1403 LOOKUP_SETUP; 1404 return LOOKUP( r, g, b ); 1405 } 1406 case PF_GRAYSCALE: 1407 return GRAY_RGB( r, g, b ); 1408 case PF_TRUEDITHER: 1409 /* fall through */ 1410 case PF_DITHER_5R6G5B: 1411 { 1412 unsigned long p; 1413 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1414 return p; 1415 } 1416 default: 1417 _mesa_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1418 } 1419 return 0; 1420} 1421 1422 1423/**********************************************************************/ 1424/***** Public Functions *****/ 1425/**********************************************************************/ 1426 1427 1428/* 1429 * Create a new X/Mesa visual. 1430 * Input: display - X11 display 1431 * visinfo - an XVisualInfo pointer 1432 * rgb_flag - GL_TRUE = RGB mode, 1433 * GL_FALSE = color index mode 1434 * alpha_flag - alpha buffer requested? 1435 * db_flag - GL_TRUE = double-buffered, 1436 * GL_FALSE = single buffered 1437 * stereo_flag - stereo visual? 1438 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1439 * GL_FALSE = use an off-screen pixmap for back buffer 1440 * depth_size - requested bits/depth values, or zero 1441 * stencil_size - requested bits/stencil values, or zero 1442 * accum_red_size - requested bits/red accum values, or zero 1443 * accum_green_size - requested bits/green accum values, or zero 1444 * accum_blue_size - requested bits/blue accum values, or zero 1445 * accum_alpha_size - requested bits/alpha accum values, or zero 1446 * num_samples - number of samples/pixel if multisampling, or zero 1447 * level - visual level, usually 0 1448 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT 1449 * Return; a new XMesaVisual or 0 if error. 1450 */ 1451XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1452 XMesaVisualInfo visinfo, 1453 GLboolean rgb_flag, 1454 GLboolean alpha_flag, 1455 GLboolean db_flag, 1456 GLboolean stereo_flag, 1457 GLboolean ximage_flag, 1458 GLint depth_size, 1459 GLint stencil_size, 1460 GLint accum_red_size, 1461 GLint accum_green_size, 1462 GLint accum_blue_size, 1463 GLint accum_alpha_size, 1464 GLint num_samples, 1465 GLint level, 1466 GLint visualCaveat ) 1467{ 1468 char *gamma; 1469 XMesaVisual v; 1470 GLint red_bits, green_bits, blue_bits, alpha_bits; 1471 1472 /* For debugging only */ 1473 if (getenv("MESA_XSYNC")) { 1474 /* This makes debugging X easier. 1475 * In your debugger, set a breakpoint on _XError to stop when an 1476 * X protocol error is generated. 1477 */ 1478#ifdef XFree86Server 1479 /* NOT_NEEDED */ 1480#else 1481 XSynchronize( display, 1 ); 1482#endif 1483 } 1484 1485 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1486 if (!v) { 1487 return NULL; 1488 } 1489 1490 /* 1491 * In the X server, NULL is passed in for the display. It will have 1492 * to be set before using this visual. See XMesaSetVisualDisplay() 1493 * below. 1494 */ 1495 v->display = display; 1496 1497 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1498 * the struct but we may need some of the information contained in it 1499 * at a later time. 1500 */ 1501#ifdef XFree86Server 1502 v->visinfo = visinfo; 1503#else 1504 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1505 if(!v->visinfo) { 1506 FREE(v); 1507 return NULL; 1508 } 1509 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1510 1511 /* Save a copy of the pointer now so we can find this visual again 1512 * if we need to search for it in find_glx_visual(). 1513 */ 1514 v->vishandle = visinfo; 1515#endif 1516 1517#ifdef XFree86Server 1518 /* Initialize the depth of the screen */ 1519 { 1520 PixmapFormatRec *format; 1521 1522 for (format = screenInfo.formats; 1523 format->depth != display->rootDepth; 1524 format++) 1525 ; 1526 v->screen_depth = format->bitsPerPixel; 1527 } 1528#endif 1529 1530 /* check for MESA_GAMMA environment variable */ 1531 gamma = getenv("MESA_GAMMA"); 1532 if (gamma) { 1533 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1534 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1535 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1536 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1537 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1538 } 1539 else { 1540 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1541 } 1542 1543 v->ximage_flag = ximage_flag; 1544 v->level = level; 1545 v->VisualCaveat = visualCaveat; 1546 1547 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1548 1549 { 1550 int xclass; 1551 xclass = GET_VISUAL_CLASS(v); 1552 if (xclass==TrueColor || xclass==DirectColor) { 1553 red_bits = bitcount(GET_REDMASK(v)); 1554 green_bits = bitcount(GET_GREENMASK(v)); 1555 blue_bits = bitcount(GET_BLUEMASK(v)); 1556 alpha_bits = 0; 1557 } 1558 else { 1559 /* this is an approximation */ 1560 int depth; 1561 depth = GET_VISUAL_DEPTH(v); 1562 red_bits = depth / 3; 1563 depth -= red_bits; 1564 green_bits = depth / 2; 1565 depth -= green_bits; 1566 blue_bits = depth; 1567 alpha_bits = 0; 1568 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1569 } 1570 } 1571 1572 if (alpha_flag && alpha_bits == 0) 1573 alpha_bits = 8; 1574 1575 _mesa_initialize_visual( &v->mesa_visual, 1576 rgb_flag, db_flag, stereo_flag, 1577 red_bits, green_bits, 1578 blue_bits, alpha_bits, 1579 v->index_bits, 1580 depth_size, 1581 stencil_size, 1582 accum_red_size, accum_green_size, 1583 accum_blue_size, accum_alpha_size, 1584 0 ); 1585 return v; 1586} 1587 1588 1589void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1590{ 1591 v->display = dpy; 1592} 1593 1594 1595void XMesaDestroyVisual( XMesaVisual v ) 1596{ 1597#ifndef XFree86Server 1598 FREE(v->visinfo); 1599#endif 1600 FREE(v); 1601} 1602 1603 1604 1605/* 1606 * Create a new XMesaContext. 1607 * Input: v - XMesaVisual 1608 * share_list - another XMesaContext with which to share display 1609 * lists or NULL if no sharing is wanted. 1610 * Return: an XMesaContext or NULL if error. 1611 */ 1612XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1613{ 1614 XMesaContext c; 1615 GLcontext *ctx; 1616 GLboolean direct = GL_TRUE; /* XXXX */ 1617 /* NOT_DONE: should this be GL_FALSE??? */ 1618 static GLboolean firstTime = GL_TRUE; 1619 1620 if (firstTime) { 1621 _glthread_INIT_MUTEX(_xmesa_lock); 1622 firstTime = GL_FALSE; 1623 } 1624 1625 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1626 if (!c) { 1627 return NULL; 1628 } 1629 1630 ctx = c->gl_ctx = _mesa_create_context( &v->mesa_visual, 1631 share_list ? share_list->gl_ctx : (GLcontext *) NULL, 1632 (void *) c, direct ); 1633 if (!c->gl_ctx) { 1634 FREE(c); 1635 return NULL; 1636 } 1637 1638 _mesa_enable_sw_extensions(ctx); 1639 _mesa_enable_1_3_extensions(ctx); 1640 ctx->Driver.BaseCompressedTexFormat = _mesa_base_compressed_texformat; 1641 ctx->Driver.CompressedTextureSize = _mesa_compressed_texture_size; 1642 ctx->Driver.GetCompressedTexImage = _mesa_get_compressed_teximage; 1643 1644 if (CHECK_BYTE_ORDER(v)) { 1645 c->swapbytes = GL_FALSE; 1646 } 1647 else { 1648 c->swapbytes = GL_TRUE; 1649 } 1650 1651 c->xm_visual = v; 1652 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1653 c->display = v->display; 1654 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1655 1656 ctx->Driver.UpdateState = xmesa_update_state; 1657 1658 /* Initialize the software rasterizer and helper modules. 1659 */ 1660 _swrast_CreateContext( ctx ); 1661 _ac_CreateContext( ctx ); 1662 _tnl_CreateContext( ctx ); 1663 _swsetup_CreateContext( ctx ); 1664 1665 xmesa_register_swrast_functions( ctx ); 1666 1667 /* Set up some constant pointers: 1668 */ 1669 xmesa_init_pointers( ctx ); 1670 1671 1672 /* Run the config file 1673 */ 1674 _mesa_read_config_file( ctx ); 1675 1676 1677 return c; 1678} 1679 1680 1681 1682 1683void XMesaDestroyContext( XMesaContext c ) 1684{ 1685#ifdef FX 1686 if (c->xm_buffer && c->xm_buffer->FXctx) 1687 fxMesaDestroyContext(c->xm_buffer->FXctx); 1688#endif 1689 if (c->gl_ctx) { 1690 _swsetup_DestroyContext( c->gl_ctx ); 1691 _swrast_DestroyContext( c->gl_ctx ); 1692 _tnl_DestroyContext( c->gl_ctx ); 1693 _ac_DestroyContext( c->gl_ctx ); 1694 _mesa_destroy_context( c->gl_ctx ); 1695 } 1696 1697 /* 1698 * XXX This code should really go away because the ancilliary data 1699 * associated with a window/pixmap should not go away just because 1700 * a context is destroyed. 1701 */ 1702#if 0 1703 /* Destroy any buffers which are using this context. If we don't 1704 * we may have dangling references. Hmm, maybe we should just 1705 * set the buffer's context pointer to NULL instead of deleting it? 1706 * Let's see if we get any bug reports... 1707 * This contributed by Doug Rabson <dfr@calcaphon.com> 1708 */ 1709 { 1710 XMesaBuffer b, next; 1711 for (b = XMesaBufferList; b; b = next) { 1712 next = b->Next; 1713 if (!b->pixmap_flag) { 1714#ifndef XFree86Server 1715 XSync(b->display, False); 1716#endif 1717 if (b->xm_context == c) { 1718 /* found a context created for this context */ 1719 XMesaDestroyBuffer( b ); 1720 } 1721 } 1722 } 1723 } 1724#endif 1725 1726 FREE( c ); 1727} 1728 1729 1730 1731/* 1732 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1733 * Create a new XMesaBuffer from an X window. 1734 * Input: v - the XMesaVisual 1735 * w - the window 1736 * c - the context 1737 * Return: new XMesaBuffer or NULL if error 1738 */ 1739XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1740 XMesaContext c ) 1741{ 1742#ifndef XFree86Server 1743 XWindowAttributes attr; 1744#endif 1745#ifdef FX 1746 char *fxEnvVar; 1747#endif 1748 int client = 0; 1749 1750 XMesaBuffer b = alloc_xmesa_buffer(); 1751 if (!b) { 1752 return NULL; 1753 } 1754 1755 (void) c; 1756 1757#ifdef XFree86Server 1758 client = CLIENT_ID(((XMesaDrawable)w)->id); 1759#endif 1760 1761 assert(v); 1762 1763#ifdef XFree86Server 1764 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1765#else 1766 XGetWindowAttributes( v->display, w, &attr ); 1767 1768 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1769#endif 1770 if (getenv("MESA_DEBUG")) { 1771 fprintf(stderr, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1772 } 1773 return NULL; 1774 } 1775 1776 b->xm_context = NULL; /* Associate no context with this buffer */ 1777 1778 b->xm_visual = v; 1779 b->pixmap_flag = GL_FALSE; 1780 b->display = v->display; 1781#ifdef XFree86Server 1782 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1783#else 1784 if (attr.colormap) { 1785 b->cmap = attr.colormap; 1786 } 1787 else { 1788 if (getenv("MESA_DEBUG")) { 1789 fprintf(stderr, "Window %u has no colormap!\n", (unsigned int) w); 1790 } 1791 /* this is weird, a window w/out a colormap!? */ 1792 /* OK, let's just allocate a new one and hope for the best */ 1793 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1794 } 1795#endif 1796 1797 /* determine back buffer implementation */ 1798 if (v->mesa_visual.doubleBufferMode) { 1799 if (v->ximage_flag) { 1800 b->db_state = BACK_XIMAGE; 1801 } 1802 else { 1803 b->db_state = BACK_PIXMAP; 1804 } 1805 } 1806 else { 1807 b->db_state = 0; 1808 } 1809 1810 _mesa_initialize_framebuffer(&b->mesa_buffer, 1811 &v->mesa_visual, 1812 v->mesa_visual.depthBits > 0, 1813 v->mesa_visual.stencilBits > 0, 1814 v->mesa_visual.accumRedBits > 0, 1815 v->mesa_visual.alphaBits > 0 ); 1816 1817 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1818 (XMesaDrawable)w, b->cmap )) { 1819 free_xmesa_buffer(client, b); 1820 return NULL; 1821 } 1822 1823#ifdef FX 1824 fxEnvVar = getenv("MESA_GLX_FX"); 1825 if (fxEnvVar) { 1826 if (fxEnvVar[0]!='d') { 1827 int attribs[100]; 1828 int numAttribs = 0; 1829 int hw; 1830 if (v->mesa_visual.depthBits > 0) { 1831 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1832 attribs[numAttribs++] = 1; 1833 } 1834 if (v->mesa_visual.doubleBufferMode) { 1835 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1836 } 1837 if (v->mesa_visual.accumRedBits > 0) { 1838 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1839 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1840 } 1841 if (v->mesa_visual.stencilBits > 0) { 1842 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1843 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1844 } 1845 if (v->mesa_visual.alphaBits > 0) { 1846 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1847 attribs[numAttribs++] = 1; 1848 } 1849 if (c->gl_ctx) { 1850#define FXMESA_SHARE_CONTEXT 990099 /* keep in sync with fxapi.c! */ 1851 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1852 attribs[numAttribs++] = (int) c->gl_ctx; 1853 } 1854 attribs[numAttribs++] = FXMESA_NONE; 1855 1856 if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) { 1857 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1858 if ((v->undithered_pf!=PF_INDEX) && (b->backimage)) { 1859 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1860 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1861 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1862 else 1863 b->FXwindowHack = GL_FALSE; 1864 } 1865 } 1866 else { 1867 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1868 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1869 GR_REFRESH_75Hz, attribs); 1870 else 1871 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1872 b->FXisHackUsable = GL_FALSE; 1873 b->FXwindowHack = GL_FALSE; 1874 } 1875 /* 1876 fprintf(stderr, 1877 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1878 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1879 */ 1880 } 1881 } 1882 else { 1883 fprintf(stderr,"WARNING: This Mesa Library includes the Glide driver but\n"); 1884 fprintf(stderr," you have not defined the MESA_GLX_FX env. var.\n"); 1885 fprintf(stderr," (check the README.3DFX file for more information).\n\n"); 1886 fprintf(stderr," you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1887 } 1888#endif 1889 1890 return b; 1891} 1892 1893 1894XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1895{ 1896 return XMesaCreateWindowBuffer2( v, w, NULL ); 1897} 1898 1899 1900/* 1901 * Create a new XMesaBuffer from an X pixmap. 1902 * Input: v - the XMesaVisual 1903 * p - the pixmap 1904 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor 1905 * visual for the pixmap 1906 * Return: new XMesaBuffer or NULL if error 1907 */ 1908XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1909 XMesaPixmap p, XMesaColormap cmap ) 1910{ 1911 int client = 0; 1912 XMesaBuffer b = alloc_xmesa_buffer(); 1913 if (!b) { 1914 return NULL; 1915 } 1916 1917 1918#ifdef XFree86Server 1919 client = CLIENT_ID(((XMesaDrawable)p)->id); 1920#endif 1921 1922 assert(v); 1923 1924 b->xm_context = NULL; /* Associate no context with this buffer */ 1925 1926 b->xm_visual = v; 1927 b->pixmap_flag = GL_TRUE; 1928 b->display = v->display; 1929 b->cmap = cmap; 1930 1931 /* determine back buffer implementation */ 1932 if (v->mesa_visual.doubleBufferMode) { 1933 if (v->ximage_flag) { 1934 b->db_state = BACK_XIMAGE; 1935 } 1936 else { 1937 b->db_state = BACK_PIXMAP; 1938 } 1939 } 1940 else { 1941 b->db_state = 0; 1942 } 1943 1944 _mesa_initialize_framebuffer(&b->mesa_buffer, 1945 &v->mesa_visual, 1946 v->mesa_visual.depthBits > 0, 1947 v->mesa_visual.stencilBits > 0, 1948 v->mesa_visual.accumRedBits + 1949 v->mesa_visual.accumGreenBits + 1950 v->mesa_visual.accumBlueBits > 0, 1951 v->mesa_visual.alphaBits > 0 ); 1952 1953 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1954 (XMesaDrawable)p, cmap)) { 1955 free_xmesa_buffer(client, b); 1956 return NULL; 1957 } 1958 1959 return b; 1960} 1961 1962 1963 1964/* 1965 * Deallocate an XMesaBuffer structure and all related info. 1966 */ 1967void XMesaDestroyBuffer( XMesaBuffer b ) 1968{ 1969 int client = 0; 1970 1971#ifdef XFree86Server 1972 if (b->frontbuffer) 1973 client = CLIENT_ID(b->frontbuffer->id); 1974#endif 1975 1976 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1977 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1978 1979 if (b->backimage) { 1980#if defined(USE_XSHM) && !defined(XFree86Server) 1981 if (b->shm) { 1982 XShmDetach( b->xm_visual->display, &b->shminfo ); 1983 XDestroyImage( b->backimage ); 1984 shmdt( b->shminfo.shmaddr ); 1985 } 1986 else 1987#endif 1988 XMesaDestroyImage( b->backimage ); 1989 } 1990 if (b->backpixmap) { 1991 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 1992 if (b->xm_visual->hpcr_clear_flag) { 1993 XMesaFreePixmap( b->xm_visual->display, 1994 b->xm_visual->hpcr_clear_pixmap ); 1995 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 1996 } 1997 } 1998 if (b->rowimage) { 1999 FREE( b->rowimage->data ); 2000 b->rowimage->data = NULL; 2001 XMesaDestroyImage( b->rowimage ); 2002 } 2003 2004 if (b->xm_context) 2005 b->xm_context->xm_buffer = NULL; 2006 2007 free_xmesa_buffer(client, b); 2008} 2009 2010 2011 2012/* 2013 * Bind buffer b to context c and make c the current rendering context. 2014 */ 2015GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2016{ 2017 return XMesaMakeCurrent2( c, b, b ); 2018} 2019 2020 2021/* 2022 * Bind buffer b to context c and make c the current rendering context. 2023 */ 2024GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2025 XMesaBuffer readBuffer ) 2026{ 2027 if (c) { 2028 if (!drawBuffer || !readBuffer) 2029 return GL_FALSE; /* must specify buffers! */ 2030 2031#ifdef FX 2032 if (drawBuffer->FXctx) { 2033 fxMesaMakeCurrent(drawBuffer->FXctx); 2034 2035 /* Disassociate drawBuffer's current context from drawBuffer */ 2036 if (drawBuffer->xm_context) 2037 drawBuffer->xm_context->xm_buffer = NULL; 2038 2039 /* Disassociate old buffer from this context */ 2040 if (c->xm_buffer) 2041 c->xm_buffer->xm_context = NULL; 2042 2043 /* Associate the context with this buffer */ 2044 drawBuffer->xm_context = c; 2045 2046 c->xm_buffer = drawBuffer; 2047 c->xm_read_buffer = readBuffer; 2048 c->use_read_buffer = (drawBuffer != readBuffer); 2049 2050 return GL_TRUE; 2051 } 2052#endif 2053 if (c->gl_ctx == _mesa_get_current_context() 2054 && c->xm_buffer == drawBuffer 2055 && c->xm_read_buffer == readBuffer 2056 && c->xm_buffer->wasCurrent) { 2057 /* same context and buffer, do nothing */ 2058 return GL_TRUE; 2059 } 2060 2061 /* Disassociate drawBuffer's current context from drawBuffer */ 2062 if (drawBuffer->xm_context) 2063 drawBuffer->xm_context->xm_buffer = NULL; 2064 2065 /* Disassociate old buffer with this context */ 2066 if (c->xm_buffer) 2067 c->xm_buffer->xm_context = NULL; 2068 2069 drawBuffer->xm_context = c; /* Associate the context with this buffer */ 2070 2071 c->xm_buffer = drawBuffer; 2072 c->xm_read_buffer = readBuffer; 2073 c->use_read_buffer = (drawBuffer != readBuffer); 2074 2075 _mesa_make_current2(c->gl_ctx, 2076 &drawBuffer->mesa_buffer, 2077 &readBuffer->mesa_buffer); 2078 2079 if (c->gl_ctx->Viewport.Width == 0) { 2080 /* initialize viewport to window size */ 2081 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2082 c->gl_ctx->Scissor.Width = drawBuffer->width; 2083 c->gl_ctx->Scissor.Height = drawBuffer->height; 2084 } 2085 2086 if (c->xm_visual->mesa_visual.rgbMode) { 2087 /* 2088 * Must recompute and set these pixel values because colormap 2089 * can be different for different windows. 2090 */ 2091 c->clearpixel = xmesa_color_to_pixel( c, 2092 c->clearcolor[0], 2093 c->clearcolor[1], 2094 c->clearcolor[2], 2095 c->clearcolor[3], 2096 c->xm_visual->undithered_pf); 2097 XMesaSetForeground(c->display, c->xm_buffer->cleargc, c->clearpixel); 2098 } 2099 2100 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2101 c->xm_buffer->wasCurrent = GL_TRUE; 2102 } 2103 else { 2104 /* Detach */ 2105 _mesa_make_current2( NULL, NULL, NULL ); 2106 } 2107 return GL_TRUE; 2108} 2109 2110 2111/* 2112 * Unbind the context c from its buffer. 2113 */ 2114GLboolean XMesaUnbindContext( XMesaContext c ) 2115{ 2116 /* A no-op for XFree86 integration purposes */ 2117 return GL_TRUE; 2118} 2119 2120 2121XMesaContext XMesaGetCurrentContext( void ) 2122{ 2123 GET_CURRENT_CONTEXT(ctx); 2124 if (ctx) { 2125 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2126 return xmesa; 2127 } 2128 else { 2129 return 0; 2130 } 2131} 2132 2133 2134XMesaBuffer XMesaGetCurrentBuffer( void ) 2135{ 2136 GET_CURRENT_CONTEXT(ctx); 2137 if (ctx) { 2138 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2139 return xmesa->xm_buffer; 2140 } 2141 else { 2142 return 0; 2143 } 2144} 2145 2146 2147/* New in Mesa 3.1 */ 2148XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2149{ 2150 GET_CURRENT_CONTEXT(ctx); 2151 if (ctx) { 2152 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2153 return xmesa->xm_buffer; 2154 } 2155 else { 2156 return 0; 2157 } 2158} 2159 2160 2161GLboolean XMesaForceCurrent(XMesaContext c) 2162{ 2163 if (c) { 2164 if (c->gl_ctx != _mesa_get_current_context()) { 2165 _mesa_make_current(c->gl_ctx, &c->xm_buffer->mesa_buffer); 2166 } 2167 } 2168 else { 2169 _mesa_make_current(NULL, NULL); 2170 } 2171 return GL_TRUE; 2172} 2173 2174 2175GLboolean XMesaLoseCurrent(XMesaContext c) 2176{ 2177 (void) c; 2178 _mesa_make_current(NULL, NULL); 2179 return GL_TRUE; 2180} 2181 2182 2183/* 2184 * Switch 3Dfx support hack between window and full-screen mode. 2185 */ 2186GLboolean XMesaSetFXmode( GLint mode ) 2187{ 2188#ifdef FX 2189 const char *fx = getenv("MESA_GLX_FX"); 2190 if (fx && fx[0] != 'd') { 2191 GET_CURRENT_CONTEXT(ctx); 2192 GrHwConfiguration hw; 2193 if (!FX_grSstQueryHardware(&hw)) { 2194 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2195 return GL_FALSE; 2196 } 2197 if (hw.num_sst < 1) { 2198 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2199 return GL_FALSE; 2200 } 2201 if (ctx) { 2202 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2203 if (mode == XMESA_FX_WINDOW) { 2204 if (xmesa->xm_buffer->FXisHackUsable) { 2205 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2206 xmesa->xm_buffer->FXwindowHack = GL_TRUE; 2207 return GL_TRUE; 2208 } 2209 } 2210 else if (mode == XMESA_FX_FULLSCREEN) { 2211 FX_grSstControl(GR_CONTROL_ACTIVATE); 2212 xmesa->xm_buffer->FXwindowHack = GL_FALSE; 2213 return GL_TRUE; 2214 } 2215 else { 2216 /* Error: Bad mode value */ 2217 } 2218 } 2219 } 2220 /*fprintf(stderr, "fallthrough\n");*/ 2221#else 2222 (void) mode; 2223#endif 2224 return GL_FALSE; 2225} 2226 2227 2228 2229#ifdef FX 2230/* 2231 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2232 */ 2233static void FXgetImage( XMesaBuffer b ) 2234{ 2235 static unsigned short pixbuf[MAX_WIDTH]; 2236 GLuint x, y; 2237 int xpos, ypos; 2238 XMesaWindow root; 2239 unsigned int bw, depth, width, height; 2240 XMesaContext xmesa = (XMesaContext) b->xm_context->gl_ctx->DriverCtx; 2241 2242 assert(xmesa->xm_buffer->FXctx); 2243 2244#ifdef XFree86Server 2245 x = b->frontbuffer->x; 2246 y = b->frontbuffer->y; 2247 width = b->frontbuffer->width; 2248 height = b->frontbuffer->height; 2249 depth = b->frontbuffer->depth; 2250#else 2251 XGetGeometry( xmesa->xm_visual->display, b->frontbuffer, 2252 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2253#endif 2254 if (b->width != width || b->height != height) { 2255 b->width = MIN2((int)width, xmesa->xm_buffer->FXctx->width); 2256 b->height = MIN2((int)height, xmesa->xm_buffer->FXctx->height); 2257 if (b->width & 1) 2258 b->width--; /* prevent odd width */ 2259 xmesa_alloc_back_buffer( b ); 2260 } 2261 2262 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2263 if (xmesa->xm_visual->undithered_pf==PF_5R6G5B) { 2264 /* Special case: 16bpp RGB */ 2265 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2266 0, xmesa->xm_buffer->FXctx->height - b->height, /*pos*/ 2267 b->width, b->height, /* size */ 2268 b->width * sizeof(GLushort), /* stride */ 2269 b->backimage->data); /* dest buffer */ 2270 } 2271 else if (xmesa->xm_visual->dithered_pf==PF_DITHER 2272 && GET_VISUAL_DEPTH(xmesa->xm_visual)==8) { 2273 /* Special case: 8bpp RGB */ 2274 for (y=0;y<b->height;y++) { 2275 GLubyte *ptr = (GLubyte*) xmesa->xm_buffer->backimage->data 2276 + xmesa->xm_buffer->backimage->bytes_per_line * y; 2277 XDITHER_SETUP(y); 2278 2279 /* read row from 3Dfx frame buffer */ 2280 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2281 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2282 b->width, 1, 2283 0, 2284 pixbuf ); 2285 2286 /* write to XImage back buffer */ 2287 for (x=0;x<b->width;x++) { 2288 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2289 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2290 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2291 *ptr++ = XDITHER( x, r, g, b); 2292 } 2293 } 2294 } 2295 else { 2296 /* General case: slow! */ 2297 for (y=0;y<b->height;y++) { 2298 /* read row from 3Dfx frame buffer */ 2299 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2300 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2301 b->width, 1, 2302 0, 2303 pixbuf ); 2304 2305 /* write to XImage back buffer */ 2306 for (x=0;x<b->width;x++) { 2307 XMesaPutPixel(b->backimage,x,y, 2308 xmesa_color_to_pixel(xmesa, 2309 (pixbuf[x] & 0xf800) >> 8, 2310 (pixbuf[x] & 0x07e0) >> 3, 2311 (pixbuf[x] & 0x001f) << 3, 2312 0xff, xmesa->pixelformat)); 2313 } 2314 } 2315 } 2316 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2317} 2318#endif 2319 2320 2321/* 2322 * Copy the back buffer to the front buffer. If there's no back buffer 2323 * this is a no-op. 2324 */ 2325void XMesaSwapBuffers( XMesaBuffer b ) 2326{ 2327 GET_CURRENT_CONTEXT(ctx); 2328 2329 /* If we're swapping the buffer associated with the current context 2330 * we have to flush any pending rendering commands first. 2331 */ 2332 if (b->xm_context && b->xm_context->gl_ctx == ctx) 2333 _mesa_swapbuffers(ctx); 2334 2335 if (b->db_state) { 2336#ifdef FX 2337 if (b->FXctx) { 2338 fxMesaSwapBuffers(); 2339 2340 if (b->FXwindowHack) 2341 FXgetImage(b); 2342 else 2343 return; 2344 } 2345#endif 2346 if (b->backimage) { 2347 /* Copy Ximage from host's memory to server's window */ 2348#if defined(USE_XSHM) && !defined(XFree86Server) 2349 if (b->shm) { 2350 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2351 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2352 b->cleargc, 2353 b->backimage, 0, 0, 2354 0, 0, b->width, b->height, False ); 2355 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2356 } 2357 else 2358#endif 2359 { 2360 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2361 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2362 b->cleargc, 2363 b->backimage, 0, 0, 2364 0, 0, b->width, b->height ); 2365 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2366 } 2367 } 2368 else { 2369 /* Copy pixmap to window on server */ 2370 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2371 XMesaCopyArea( b->xm_visual->display, 2372 b->backpixmap, /* source drawable */ 2373 b->frontbuffer, /* dest. drawable */ 2374 b->cleargc, 2375 0, 0, b->width, b->height, /* source region */ 2376 0, 0 /* dest region */ 2377 ); 2378 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2379 } 2380 } 2381#if !defined(XFree86Server) 2382 XSync( b->xm_visual->display, False ); 2383#endif 2384} 2385 2386 2387 2388/* 2389 * Copy sub-region of back buffer to front buffer 2390 */ 2391void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2392{ 2393 GET_CURRENT_CONTEXT(ctx); 2394 2395 /* If we're swapping the buffer associated with the current context 2396 * we have to flush any pending rendering commands first. 2397 */ 2398 if (b->xm_context->gl_ctx == ctx) 2399 _mesa_swapbuffers(ctx); 2400 2401 if (b->db_state) { 2402 int yTop = b->height - y - height; 2403#ifdef FX 2404 if (b->FXctx) { 2405 fxMesaSwapBuffers(); 2406 if (b->FXwindowHack) 2407 FXgetImage(b); 2408 else 2409 return; 2410 } 2411#endif 2412 if (b->backimage) { 2413 /* Copy Ximage from host's memory to server's window */ 2414#if defined(USE_XSHM) && !defined(XFree86Server) 2415 if (b->shm) { 2416 /* XXX assuming width and height aren't too large! */ 2417 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2418 b->cleargc, 2419 b->backimage, x, yTop, 2420 x, yTop, width, height, False ); 2421 /* wait for finished event??? */ 2422 } 2423 else 2424#endif 2425 { 2426 /* XXX assuming width and height aren't too large! */ 2427 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2428 b->cleargc, 2429 b->backimage, x, yTop, 2430 x, yTop, width, height ); 2431 } 2432 } 2433 else { 2434 /* Copy pixmap to window on server */ 2435 XMesaCopyArea( b->xm_visual->display, 2436 b->backpixmap, /* source drawable */ 2437 b->frontbuffer, /* dest. drawable */ 2438 b->cleargc, 2439 x, yTop, width, height, /* source region */ 2440 x, yTop /* dest region */ 2441 ); 2442 } 2443 } 2444} 2445 2446 2447/* 2448 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2449 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2450 * back buffer directly. 2451 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2452 * ximage - pointer to back buffer's XImage, or NULL 2453 * Return: GL_TRUE = context is double buffered 2454 * GL_FALSE = context is single buffered 2455 */ 2456GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2457 XMesaPixmap *pixmap, 2458 XMesaImage **ximage ) 2459{ 2460 if (b->db_state) { 2461 if (pixmap) *pixmap = b->backpixmap; 2462 if (ximage) *ximage = b->backimage; 2463 return GL_TRUE; 2464 } 2465 else { 2466 *pixmap = 0; 2467 *ximage = NULL; 2468 return GL_FALSE; 2469 } 2470} 2471 2472 2473/* 2474 * Return the depth buffer associated with an XMesaBuffer. 2475 * Input: b - the XMesa buffer handle 2476 * Output: width, height - size of buffer in pixels 2477 * bytesPerValue - bytes per depth value (2 or 4) 2478 * buffer - pointer to depth buffer values 2479 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2480 */ 2481GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2482 GLint *bytesPerValue, void **buffer ) 2483{ 2484 if (!b->mesa_buffer.DepthBuffer) { 2485 *width = 0; 2486 *height = 0; 2487 *bytesPerValue = 0; 2488 *buffer = 0; 2489 return GL_FALSE; 2490 } 2491 else { 2492 *width = b->mesa_buffer.Width; 2493 *height = b->mesa_buffer.Height; 2494 *bytesPerValue = sizeof(GLdepth); 2495 *buffer = b->mesa_buffer.DepthBuffer; 2496 return GL_TRUE; 2497 } 2498} 2499 2500 2501void XMesaFlush( XMesaContext c ) 2502{ 2503 if (c && c->xm_visual) { 2504#ifdef XFree86Server 2505 /* NOT_NEEDED */ 2506#else 2507 XSync( c->xm_visual->display, False ); 2508#endif 2509 } 2510} 2511 2512 2513 2514const char *XMesaGetString( XMesaContext c, int name ) 2515{ 2516 (void) c; 2517 if (name==XMESA_VERSION) { 2518 return "3.5"; 2519 } 2520 else if (name==XMESA_EXTENSIONS) { 2521 return ""; 2522 } 2523 else { 2524 return NULL; 2525 } 2526} 2527 2528 2529 2530XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2531{ 2532 XMesaBuffer b; 2533 for (b=XMesaBufferList; b; b=b->Next) { 2534 if (b->frontbuffer==d && b->display==dpy) { 2535 return b; 2536 } 2537 } 2538 return NULL; 2539} 2540 2541 2542 2543/* 2544 * Look for XMesaBuffers whose X window has been destroyed. 2545 * Deallocate any such XMesaBuffers. 2546 */ 2547void XMesaGarbageCollect( void ) 2548{ 2549 XMesaBuffer b, next; 2550 for (b=XMesaBufferList; b; b=next) { 2551 next = b->Next; 2552 if (!b->pixmap_flag) { 2553#ifdef XFree86Server 2554 /* NOT_NEEDED */ 2555#else 2556 XSync(b->display, False); 2557 if (!window_exists( b->display, b->frontbuffer )) { 2558 /* found a dead window, free the ancillary info */ 2559 XMesaDestroyBuffer( b ); 2560 } 2561#endif 2562 } 2563 } 2564} 2565 2566 2567void XMesaReset( void ) 2568{ 2569 while (XMesaBufferList) 2570 XMesaDestroyBuffer(XMesaBufferList); 2571 2572 XMesaBufferList = NULL; 2573} 2574 2575 2576unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2577 GLfloat red, GLfloat green, 2578 GLfloat blue, GLfloat alpha ) 2579{ 2580 GLint r = (GLint) (red * 255.0F); 2581 GLint g = (GLint) (green * 255.0F); 2582 GLint b = (GLint) (blue * 255.0F); 2583 GLint a = (GLint) (alpha * 255.0F); 2584 2585 switch (xmesa->pixelformat) { 2586 case PF_INDEX: 2587 return 0; 2588 case PF_TRUECOLOR: 2589 { 2590 unsigned long p; 2591 PACK_TRUECOLOR( p, r, g, b ); 2592 return p; 2593 } 2594 case PF_8A8B8G8R: 2595 return PACK_8A8B8G8R( r, g, b, a ); 2596 case PF_8R8G8B: 2597 return PACK_8R8G8B( r, g, b ); 2598 case PF_5R6G5B: 2599 return PACK_5R6G5B( r, g, b ); 2600 case PF_DITHER: 2601 { 2602 DITHER_SETUP; 2603 return DITHER( x, y, r, g, b ); 2604 } 2605 case PF_1BIT: 2606 /* 382 = (3*255)/2 */ 2607 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2608 case PF_HPCR: 2609 return DITHER_HPCR(x, y, r, g, b); 2610 case PF_LOOKUP: 2611 { 2612 LOOKUP_SETUP; 2613 return LOOKUP( r, g, b ); 2614 } 2615 case PF_GRAYSCALE: 2616 return GRAY_RGB( r, g, b ); 2617 case PF_DITHER_5R6G5B: 2618 /* fall through */ 2619 case PF_TRUEDITHER: 2620 { 2621 unsigned long p; 2622 PACK_TRUEDITHER(p, x, y, r, g, b); 2623 return p; 2624 } 2625 default: 2626 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2627 } 2628 return 0; 2629} 2630 2631 2632