xm_api.c revision 3cbbef53bcf9a74beec3d6699a03e8d0c2eb24e2
1/* $Id: xm_api.c,v 1.12 2000/12/13 00:47:10 brianp Exp $ */ 2 3/* 4 * Mesa 3-D graphics library 5 * Version: 3.5 6 * 7 * Copyright (C) 1999-2000 Brian Paul All Rights Reserved. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included 17 * in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 */ 26 27 28/* 29 * This file contains the implementations of all the XMesa* functions. 30 * 31 * 32 * NOTES: 33 * 34 * The window coordinate system origin (0,0) is in the lower-left corner 35 * of the window. X11's window coordinate origin is in the upper-left 36 * corner of the window. Therefore, most drawing functions in this 37 * file have to flip Y coordinates. 38 * 39 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 40 * in support for the MIT Shared Memory extension. If enabled, when you 41 * use an Ximage for the back buffer in double buffered mode, the "swap" 42 * operation will be faster. You must also link with -lXext. 43 * 44 * Byte swapping: If the Mesa host and the X display use a different 45 * byte order then there's some trickiness to be aware of when using 46 * XImages. The byte ordering used for the XImage is that of the X 47 * display, not the Mesa host. 48 * The color-to-pixel encoding for True/DirectColor must be done 49 * according to the display's visual red_mask, green_mask, and blue_mask. 50 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 51 * do byte swapping if needed. If one wants to directly "poke" the pixel 52 * into the XImage's buffer then the pixel must be byte swapped first. In 53 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 54 * and use XPutPixel everywhere except in the implementation of 55 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 56 * instead of using XPutPixel we "poke" our values after byte-swapping 57 * the clear pixel value if needed. 58 * 59 */ 60 61#ifdef __CYGWIN__ 62#undef WIN32 63#undef __WIN32__ 64#endif 65 66#include "glxheader.h" 67#include "GL/xmesa.h" 68#include "xmesaP.h" 69#include "context.h" 70#include "extensions.h" 71#include "glthread.h" 72#include "matrix.h" 73#include "mem.h" 74#include "mtypes.h" 75#ifdef HAVE_CONFIG_H 76#include "conf.h" 77#endif 78#include "macros.h" 79#include "swrast/swrast.h" 80#include "swrast_setup/swrast_setup.h" 81#include "tnl/tnl.h" 82 83#ifndef GLX_NONE_EXT 84#define GLX_NONE_EXT 0x8000 85#endif 86 87 88/* 89 * Global X driver lock 90 */ 91_glthread_Mutex _xmesa_lock; 92 93 94 95/* 96 * Lookup tables for HPCR pixel format: 97 */ 98static short hpcr_rgbTbl[3][256] = { 99{ 100 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 101 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 102 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 103 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 104 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 105 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 106 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 107 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 108112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 109128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 110144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 111160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 112176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 113192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 114208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 115224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 116}, 117{ 118 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 119 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 120 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 121 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 122 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 123 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 124 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 125 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 126112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 127128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 128144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 129160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 130176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 131192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 132208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 133224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 134}, 135{ 136 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 137 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 138 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 139 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 140 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 141 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 142 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 143 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 144 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 145112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 146128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 147144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 148160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 149176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 150192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 151208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 152} 153}; 154 155 156 157/**********************************************************************/ 158/***** X Utility Functions *****/ 159/**********************************************************************/ 160 161 162/* 163 * X/Mesa error reporting function: 164 */ 165static void error( const char *msg ) 166{ 167 if (getenv("MESA_DEBUG")) 168 fprintf( stderr, "X/Mesa error: %s\n", msg ); 169} 170 171 172/* 173 * Return the host's byte order as LSBFirst or MSBFirst ala X. 174 */ 175#ifndef XFree86Server 176static int host_byte_order( void ) 177{ 178 int i = 1; 179 char *cptr = (char *) &i; 180 return (*cptr==1) ? LSBFirst : MSBFirst; 181} 182#endif 183 184 185/* 186 * Error handling. 187 */ 188#ifndef XFree86Server 189static int mesaXErrorFlag = 0; 190 191static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 192{ 193 (void) dpy; 194 (void) event; 195 mesaXErrorFlag = 1; 196 return 0; 197} 198#endif 199 200 201/* 202 * Check if the X Shared Memory extension is available. 203 * Return: 0 = not available 204 * 1 = shared XImage support available 205 * 2 = shared Pixmap support available also 206 */ 207#ifndef XFree86Server 208static int check_for_xshm( XMesaDisplay *display ) 209{ 210#ifdef USE_XSHM 211 int major, minor, ignore; 212 Bool pixmaps; 213 214 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 215 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 216 return (pixmaps==True) ? 2 : 1; 217 } 218 else { 219 return 0; 220 } 221 } 222 else { 223 return 0; 224 } 225#else 226 /* Can't compile XSHM support */ 227 return 0; 228#endif 229} 230#endif 231 232 233/* 234 * Return the width and height of the given drawable. 235 */ 236static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 237 unsigned int *width, unsigned int *height) 238{ 239#ifdef XFree86Server 240 (void) dpy; 241 *width = d->width; 242 *height = d->height; 243#else 244 Window root; 245 int x, y; 246 unsigned int bw, depth; 247 248 _glthread_LOCK_MUTEX(_xmesa_lock); 249 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 250 _glthread_UNLOCK_MUTEX(_xmesa_lock); 251#endif 252} 253 254 255/* 256 * Apply gamma correction to an intensity value in [0..max]. Return the 257 * new intensity value. 258 */ 259static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 260{ 261 if (gamma == 1.0) { 262 return value; 263 } 264 else { 265 double x = (double) value / (double) max; 266 return (GLint) ((GLfloat) max * pow( x, 1.0F/gamma ) + 0.5F); 267 } 268} 269 270 271 272/* 273 * Return the true number of bits per pixel for XImages. 274 * For example, if we request a 24-bit deep visual we may actually need/get 275 * 32bpp XImages. This function returns the appropriate bpp. 276 * Input: dpy - the X display 277 * visinfo - desribes the visual to be used for XImages 278 * Return: true number of bits per pixel for XImages 279 */ 280#define GET_BITS_PER_PIXEL(xmv) bits_per_pixel(xmv) 281 282#ifdef XFree86Server 283 284static int bits_per_pixel( XMesaVisual xmv ) 285{ 286 XMesaVisualInfo visinfo = xmv->visinfo; 287 const int depth = visinfo->nplanes; 288 int i; 289 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 290 if (screenInfo.formats[i].depth == depth) 291 return screenInfo.formats[i].bitsPerPixel; 292 } 293 return depth; /* should never get here, but this should be safe */ 294} 295 296#else 297 298static int bits_per_pixel( XMesaVisual xmv ) 299{ 300 XMesaDisplay *dpy = xmv->display; 301 XMesaVisualInfo visinfo = xmv->visinfo; 302 XMesaImage *img; 303 int bitsPerPixel; 304 /* Create a temporary XImage */ 305 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 306 ZPixmap, 0, /*format, offset*/ 307 (char*) MALLOC(8), /*data*/ 308 1, 1, /*width, height*/ 309 32, /*bitmap_pad*/ 310 0 /*bytes_per_line*/ 311 ); 312 assert(img); 313 /* grab the bits/pixel value */ 314 bitsPerPixel = img->bits_per_pixel; 315 /* free the XImage */ 316 FREE( img->data ); 317 img->data = NULL; 318 XMesaDestroyImage( img ); 319 return bitsPerPixel; 320} 321#endif 322 323 324 325/* 326 * Determine if a given X window ID is valid (window exists). 327 * Do this by calling XGetWindowAttributes() for the window and 328 * checking if we catch an X error. 329 * Input: dpy - the display 330 * win - the window to check for existance 331 * Return: GL_TRUE - window exists 332 * GL_FALSE - window doesn't exist 333 */ 334#ifndef XFree86Server 335static GLboolean WindowExistsFlag; 336 337static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 338{ 339 (void) dpy; 340 if (xerr->error_code == BadWindow) { 341 WindowExistsFlag = GL_FALSE; 342 } 343 return 0; 344} 345 346static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 347{ 348 XWindowAttributes wa; 349 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 350 WindowExistsFlag = GL_TRUE; 351 old_handler = XSetErrorHandler(window_exists_err_handler); 352 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 353 XSetErrorHandler(old_handler); 354 return WindowExistsFlag; 355} 356#endif 357 358 359 360/**********************************************************************/ 361/***** Linked list of XMesaBuffers *****/ 362/**********************************************************************/ 363 364static XMesaBuffer XMesaBufferList = NULL; 365 366 367/* Allocate a new XMesaBuffer, add to linked list */ 368static XMesaBuffer alloc_xmesa_buffer(void) 369{ 370 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 371 if (b) { 372 b->Next = XMesaBufferList; 373 XMesaBufferList = b; 374 } 375 return b; 376} 377 378 379/* 380 * Find an XMesaBuffer by matching X display and colormap but NOT matching 381 * the notThis buffer. 382 */ 383static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 384 XMesaColormap cmap, 385 XMesaBuffer notThis) 386{ 387 XMesaBuffer b; 388 for (b=XMesaBufferList; b; b=b->Next) { 389 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 390 return b; 391 } 392 } 393 return NULL; 394} 395 396 397/* 398 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 399 * entries. 400 */ 401static void free_xmesa_buffer(int client, XMesaBuffer buffer) 402{ 403 XMesaBuffer prev = NULL, b; 404 (void) client; 405 for (b=XMesaBufferList; b; b=b->Next) { 406 if (b==buffer) { 407 /* unlink bufer from list */ 408 if (prev) 409 prev->Next = buffer->Next; 410 else 411 XMesaBufferList = buffer->Next; 412 /* Check to free X colors */ 413 if (buffer->num_alloced>0) { 414 /* If no other buffer uses this X colormap then free the colors. */ 415 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 416#ifdef XFree86Server 417 (void)FreeColors(buffer->cmap, client, 418 buffer->num_alloced, buffer->alloced_colors, 419 0); 420#else 421 XFreeColors(buffer->display, buffer->cmap, 422 buffer->alloced_colors, buffer->num_alloced, 0); 423#endif 424 } 425 } 426 FREE(buffer); 427 return; 428 } 429 /* continue search */ 430 prev = b; 431 } 432 /* buffer not found in XMesaBufferList */ 433 gl_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 434} 435 436 437/* Copy X color table stuff from one XMesaBuffer to another. */ 438static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 439{ 440 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 441 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 442 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 443 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 444 dst->num_alloced = src->num_alloced; 445 MEMCPY(dst->alloced_colors, src->alloced_colors, 446 sizeof(src->alloced_colors)); 447} 448 449 450 451/**********************************************************************/ 452/***** Misc Private Functions *****/ 453/**********************************************************************/ 454 455 456/* 457 * Return number of bits set in n. 458 */ 459static int bitcount( unsigned long n ) 460{ 461 int bits; 462 for (bits=0; n>0; n=n>>1) { 463 if (n&1) { 464 bits++; 465 } 466 } 467 return bits; 468} 469 470 471 472/* 473 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 474 * Return: GL_TRUE if success, GL_FALSE if error 475 */ 476#ifndef XFree86Server 477static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 478{ 479#ifdef USE_XSHM 480 /* 481 * We have to do a _lot_ of error checking here to be sure we can 482 * really use the XSHM extension. It seems different servers trigger 483 * errors at different points if the extension won't work. Therefore 484 * we have to be very careful... 485 */ 486 GC gc; 487 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 488 489 b->backimage = XShmCreateImage( b->xm_visual->display, 490 b->xm_visual->visinfo->visual, 491 b->xm_visual->visinfo->depth, 492 ZPixmap, NULL, &b->shminfo, 493 b->width, b->height ); 494 if (b->backimage == NULL) { 495 error("alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 496 b->shm = 0; 497 return GL_FALSE; 498 } 499 500 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 501 * b->backimage->height, IPC_CREAT|0777 ); 502 if (b->shminfo.shmid < 0) { 503 if (getenv("MESA_DEBUG")) 504 perror("alloc_back_buffer"); 505 XDestroyImage( b->backimage ); 506 b->backimage = NULL; 507 error("alloc_back_buffer: Shared memory error (shmget), disabling."); 508 b->shm = 0; 509 return GL_FALSE; 510 } 511 512 b->shminfo.shmaddr = b->backimage->data 513 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 514 if (b->shminfo.shmaddr == (char *) -1) { 515 if (getenv("MESA_DEBUG")) 516 perror("alloc_back_buffer"); 517 XDestroyImage( b->backimage ); 518 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 519 b->backimage = NULL; 520 error("alloc_back_buffer: Shared memory error (shmat), disabling."); 521 b->shm = 0; 522 return GL_FALSE; 523 } 524 525 b->shminfo.readOnly = False; 526 mesaXErrorFlag = 0; 527 old_handler = XSetErrorHandler( mesaHandleXError ); 528 /* This may trigger the X protocol error we're ready to catch: */ 529 XShmAttach( b->xm_visual->display, &b->shminfo ); 530 XSync( b->xm_visual->display, False ); 531 532 if (mesaXErrorFlag) { 533 /* we are on a remote display, this error is normal, don't print it */ 534 XFlush( b->xm_visual->display ); 535 mesaXErrorFlag = 0; 536 XDestroyImage( b->backimage ); 537 shmdt( b->shminfo.shmaddr ); 538 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 539 b->backimage = NULL; 540 b->shm = 0; 541 (void) XSetErrorHandler( old_handler ); 542 return GL_FALSE; 543 } 544 545 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 546 547 /* Finally, try an XShmPutImage to be really sure the extension works */ 548 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 549 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 550 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 551 XSync( b->xm_visual->display, False ); 552 XFreeGC( b->xm_visual->display, gc ); 553 (void) XSetErrorHandler( old_handler ); 554 if (mesaXErrorFlag) { 555 XFlush( b->xm_visual->display ); 556 mesaXErrorFlag = 0; 557 XDestroyImage( b->backimage ); 558 shmdt( b->shminfo.shmaddr ); 559 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 560 b->backimage = NULL; 561 b->shm = 0; 562 return GL_FALSE; 563 } 564 565 if (b->backimage) { 566 int height = b->backimage->height; 567 /* Needed by PIXELADDR1 macro */ 568 b->ximage_width1 = b->backimage->bytes_per_line; 569 b->ximage_origin1 = (GLubyte *) b->backimage->data 570 + b->ximage_width1 * (height-1); 571 /* Needed by PIXELADDR2 macro */ 572 b->ximage_width2 = b->backimage->bytes_per_line / 2; 573 b->ximage_origin2 = (GLushort *) b->backimage->data 574 + b->ximage_width2 * (height-1); 575 /* Needed by PIXELADDR3 macro */ 576 b->ximage_width3 = b->backimage->bytes_per_line; 577 b->ximage_origin3 = (GLubyte *) b->backimage->data 578 + b->ximage_width3 * (height-1); 579 /* Needed by PIXELADDR4 macro */ 580 b->ximage_width4 = b->backimage->width; 581 b->ximage_origin4 = (GLuint *) b->backimage->data 582 + b->ximage_width4 * (height-1); 583 } 584 585 return GL_TRUE; 586#else 587 /* Can't compile XSHM support */ 588 return GL_FALSE; 589#endif 590} 591#endif 592 593 594 595/* 596 * Setup an off-screen pixmap or Ximage to use as the back buffer. 597 * Input: b - the X/Mesa buffer 598 */ 599void xmesa_alloc_back_buffer( XMesaBuffer b ) 600{ 601 if (b->db_state==BACK_XIMAGE) { 602 /* Deallocate the old backimage, if any */ 603 if (b->backimage) { 604#if defined(USE_XSHM) && !defined(XFree86Server) 605 if (b->shm) { 606 XShmDetach( b->xm_visual->display, &b->shminfo ); 607 XDestroyImage( b->backimage ); 608 shmdt( b->shminfo.shmaddr ); 609 } 610 else 611#endif 612 XMesaDestroyImage( b->backimage ); 613 b->backimage = NULL; 614 } 615 616 /* Allocate new back buffer */ 617#ifdef XFree86Server 618 { 619 /* Allocate a regular XImage for the back buffer. */ 620 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 621 b->width, b->height, NULL); 622#else 623 if (b->shm==0 624 || alloc_shm_back_buffer(b)==GL_FALSE 625 ) { 626 /* Allocate a regular XImage for the back buffer. */ 627 b->backimage = XCreateImage( b->xm_visual->display, 628 b->xm_visual->visinfo->visual, 629 GET_VISUAL_DEPTH(b->xm_visual), 630 ZPixmap, 0, /* format, offset */ 631 NULL, b->width, b->height, 632 8, 0 ); /* pad, bytes_per_line */ 633#endif 634 if (!b->backimage) { 635 error("alloc_back_buffer: XCreateImage failed."); 636 } 637 b->backimage->data = (char *) MALLOC( b->backimage->height 638 * b->backimage->bytes_per_line ); 639 if (!b->backimage->data) { 640 error("alloc_back_buffer: MALLOC failed."); 641 XMesaDestroyImage( b->backimage ); 642 b->backimage = NULL; 643 } 644 } 645 b->backpixmap = None; 646 } 647 else if (b->db_state==BACK_PIXMAP) { 648 XMesaPixmap old_pixmap = b->backpixmap; 649 /* Free the old back pixmap */ 650 if (b->backpixmap) { 651 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 652 } 653 /* Allocate new back pixmap */ 654 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 655 b->width, b->height, 656 GET_VISUAL_DEPTH(b->xm_visual) ); 657 b->backimage = NULL; 658 /* update other references to backpixmap */ 659 if (b->buffer==(XMesaDrawable)old_pixmap) { 660 b->buffer = (XMesaDrawable)b->backpixmap; 661 } 662 } 663} 664 665 666 667/* 668 * A replacement for XAllocColor. This function should never 669 * fail to allocate a color. When XAllocColor fails, we return 670 * the nearest matching color. If we have to allocate many colors 671 * this function isn't too efficient; the XQueryColors() could be 672 * done just once. 673 * Written by Michael Pichler, Brian Paul, Mark Kilgard 674 * Input: dpy - X display 675 * cmap - X colormap 676 * cmapSize - size of colormap 677 * In/Out: color - the XColor struct 678 * Output: exact - 1=exact color match, 0=closest match 679 * alloced - 1=XAlloc worked, 0=XAlloc failed 680 */ 681static void 682noFaultXAllocColor( int client, 683 XMesaDisplay *dpy, 684 XMesaColormap cmap, 685 int cmapSize, 686 XMesaColor *color, 687 int *exact, int *alloced ) 688{ 689#ifdef XFree86Server 690 Pixel *ppixIn; 691 xrgb *ctable; 692#else 693 /* we'll try to cache ctable for better remote display performance */ 694 static Display *prevDisplay = NULL; 695 static XMesaColormap prevCmap = 0; 696 static int prevCmapSize = 0; 697 static XMesaColor *ctable = NULL; 698#endif 699 XMesaColor subColor; 700 int i, bestmatch; 701 double mindist; /* 3*2^16^2 exceeds long int precision. */ 702 703 (void) client; 704 705 /* First try just using XAllocColor. */ 706#ifdef XFree86Server 707 if (AllocColor(cmap, 708 &color->red, &color->green, &color->blue, 709 &color->pixel, 710 client) == Success) { 711#else 712 if (XAllocColor(dpy, cmap, color)) { 713#endif 714 *exact = 1; 715 *alloced = 1; 716 return; 717 } 718 719 /* Alloc failed, search for closest match */ 720 721 /* Retrieve color table entries. */ 722 /* XXX alloca candidate. */ 723#ifdef XFree86Server 724 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 725 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 726 for (i = 0; i < cmapSize; i++) { 727 ppixIn[i] = i; 728 } 729 QueryColors(cmap, cmapSize, ppixIn, ctable); 730#else 731 if (prevDisplay != dpy || prevCmap != cmap 732 || prevCmapSize != cmapSize || !ctable) { 733 /* free previously cached color table */ 734 if (ctable) 735 FREE(ctable); 736 /* Get the color table from X */ 737 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 738 assert(ctable); 739 for (i = 0; i < cmapSize; i++) { 740 ctable[i].pixel = i; 741 } 742 XQueryColors(dpy, cmap, ctable, cmapSize); 743 prevDisplay = dpy; 744 prevCmap = cmap; 745 prevCmapSize = cmapSize; 746 } 747#endif 748 749 /* Find best match. */ 750 bestmatch = -1; 751 mindist = 0.0; 752 for (i = 0; i < cmapSize; i++) { 753 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 754 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 755 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 756 double dist = dr * dr + dg * dg + db * db; 757 if (bestmatch < 0 || dist < mindist) { 758 bestmatch = i; 759 mindist = dist; 760 } 761 } 762 763 /* Return result. */ 764 subColor.red = ctable[bestmatch].red; 765 subColor.green = ctable[bestmatch].green; 766 subColor.blue = ctable[bestmatch].blue; 767 /* Try to allocate the closest match color. This should only 768 * fail if the cell is read/write. Otherwise, we're incrementing 769 * the cell's reference count. 770 */ 771#ifdef XFree86Server 772 if (AllocColor(cmap, 773 &subColor.red, &subColor.green, &subColor.blue, 774 &subColor.pixel, 775 client) == Success) { 776#else 777 if (XAllocColor(dpy, cmap, &subColor)) { 778#endif 779 *alloced = 1; 780 } 781 else { 782 /* do this to work around a problem reported by Frank Ortega */ 783 subColor.pixel = (unsigned long) bestmatch; 784 subColor.red = ctable[bestmatch].red; 785 subColor.green = ctable[bestmatch].green; 786 subColor.blue = ctable[bestmatch].blue; 787 subColor.flags = DoRed | DoGreen | DoBlue; 788 *alloced = 0; 789 } 790#ifdef XFree86Server 791 FREE(ppixIn); 792 FREE(ctable); 793#else 794 /* don't free table, save it for next time */ 795#endif 796 797 *color = subColor; 798 *exact = 0; 799} 800 801 802 803 804/* 805 * Do setup for PF_GRAYSCALE pixel format. 806 * Note that buffer may be NULL. 807 */ 808static GLboolean setup_grayscale( int client, XMesaVisual v, 809 XMesaBuffer buffer, XMesaColormap cmap ) 810{ 811 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 812 return GL_FALSE; 813 } 814 815 if (buffer) { 816 XMesaBuffer prevBuffer; 817 818 if (!cmap) { 819 return GL_FALSE; 820 } 821 822 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 823 if (prevBuffer && 824 (buffer->xm_visual->gl_visual->RGBAflag == 825 prevBuffer->xm_visual->gl_visual->RGBAflag)) { 826 /* Copy colormap stuff from previous XMesaBuffer which uses same 827 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 828 */ 829 copy_colortable_info(buffer, prevBuffer); 830 } 831 else { 832 /* Allocate 256 shades of gray */ 833 int gray; 834 int colorsfailed = 0; 835 for (gray=0;gray<256;gray++) { 836 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 837 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 838 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 839 int exact, alloced; 840 XMesaColor xcol; 841 xcol.red = (r << 8) | r; 842 xcol.green = (g << 8) | g; 843 xcol.blue = (b << 8) | b; 844 noFaultXAllocColor( client, v->display, 845 cmap, GET_COLORMAP_SIZE(v), 846 &xcol, &exact, &alloced ); 847 if (!exact) { 848 colorsfailed++; 849 } 850 if (alloced) { 851 assert(buffer->num_alloced<256); 852 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 853 buffer->num_alloced++; 854 } 855 856 /*OLD 857 assert(gray < 576); 858 buffer->color_table[gray*3+0] = xcol.pixel; 859 buffer->color_table[gray*3+1] = xcol.pixel; 860 buffer->color_table[gray*3+2] = xcol.pixel; 861 assert(xcol.pixel < 65536); 862 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 863 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 864 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 865 */ 866 buffer->color_table[gray] = xcol.pixel; 867 assert(xcol.pixel < 65536); 868 buffer->pixel_to_r[xcol.pixel] = gray; 869 buffer->pixel_to_g[xcol.pixel] = gray; 870 buffer->pixel_to_b[xcol.pixel] = gray; 871 } 872 873 if (colorsfailed && getenv("MESA_DEBUG")) { 874 fprintf( stderr, 875 "Note: %d out of 256 needed colors do not match exactly.\n", 876 colorsfailed ); 877 } 878 } 879 } 880 881 v->dithered_pf = PF_GRAYSCALE; 882 v->undithered_pf = PF_GRAYSCALE; 883 return GL_TRUE; 884} 885 886 887 888/* 889 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 890 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 891 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 892 * color. While this function was originally designed just for 8-bit 893 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 894 * Dithering code contributed by Bob Mercier. 895 */ 896static GLboolean setup_dithered_color( int client, XMesaVisual v, 897 XMesaBuffer buffer, XMesaColormap cmap ) 898{ 899 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 900 return GL_FALSE; 901 } 902 903 if (buffer) { 904 XMesaBuffer prevBuffer; 905 906 if (!cmap) { 907 return GL_FALSE; 908 } 909 910 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 911 if (prevBuffer && 912 (buffer->xm_visual->gl_visual->RGBAflag == 913 prevBuffer->xm_visual->gl_visual->RGBAflag)) { 914 /* Copy colormap stuff from previous, matching XMesaBuffer. 915 * Do this to avoid time spent in noFaultXAllocColor. 916 */ 917 copy_colortable_info(buffer, prevBuffer); 918 } 919 else { 920 /* Allocate X colors and initialize color_table[], red_table[], etc */ 921 int r, g, b, i; 922 int colorsfailed = 0; 923 for (r = 0; r < _R; r++) { 924 for (g = 0; g < _G; g++) { 925 for (b = 0; b < _B; b++) { 926 XMesaColor xcol; 927 int exact, alloced; 928 xcol.red =gamma_adjust(v->RedGamma, r*65535/(_R-1),65535); 929 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(_G-1),65535); 930 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(_B-1),65535); 931 noFaultXAllocColor( client, v->display, 932 cmap, GET_COLORMAP_SIZE(v), 933 &xcol, &exact, &alloced ); 934 if (!exact) { 935 colorsfailed++; 936 } 937 if (alloced) { 938 assert(buffer->num_alloced<256); 939 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 940 buffer->num_alloced++; 941 } 942 i = _MIX( r, g, b ); 943 assert(i < 576); 944 buffer->color_table[i] = xcol.pixel; 945 assert(xcol.pixel < 65536); 946 buffer->pixel_to_r[xcol.pixel] = r * 255 / (_R-1); 947 buffer->pixel_to_g[xcol.pixel] = g * 255 / (_G-1); 948 buffer->pixel_to_b[xcol.pixel] = b * 255 / (_B-1); 949 } 950 } 951 } 952 953 if (colorsfailed && getenv("MESA_DEBUG")) { 954 fprintf( stderr, 955 "Note: %d out of %d needed colors do not match exactly.\n", 956 colorsfailed, _R*_G*_B ); 957 } 958 } 959 } 960 961 v->dithered_pf = PF_DITHER; 962 v->undithered_pf = PF_LOOKUP; 963 return GL_TRUE; 964} 965 966 967/* 968 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 969 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 970 * Special dithering tables have to be initialized. 971 */ 972static void setup_8bit_hpcr( XMesaVisual v ) 973{ 974 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 975 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 976 * on the root window AND the colormap obtainable by XGetRGBColormaps 977 * for that atom must be set on the window. (see also tkInitWindow) 978 * If that colormap is not set, the output will look stripy. 979 */ 980 981 /* Setup color tables with gamma correction */ 982 int i; 983 double g; 984 985 g = 1.0 / v->RedGamma; 986 for (i=0; i<256; i++) { 987 GLint red = (GLint) (255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g ) + 0.5); 988 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 989 } 990 991 g = 1.0 / v->GreenGamma; 992 for (i=0; i<256; i++) { 993 GLint green = (GLint) (255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g ) + 0.5); 994 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 995 } 996 997 g = 1.0 / v->BlueGamma; 998 for (i=0; i<256; i++) { 999 GLint blue = (GLint) (255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g ) + 0.5); 1000 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 1001 } 1002 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 1003 v->dithered_pf = PF_HPCR; 1004 1005 /* which method should I use to clear */ 1006 /* GL_FALSE: keep the ordinary method */ 1007 /* GL_TRUE : clear with dither pattern */ 1008 v->hpcr_clear_flag = getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 1009 1010 if (v->hpcr_clear_flag) { 1011 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 1012 DefaultRootWindow(v->display), 1013 16, 2, 8); 1014#ifndef XFree86Server 1015 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1016 0, 0, 16, 2, AllPlanes, ZPixmap); 1017#endif 1018 } 1019} 1020 1021 1022/* 1023 * Setup RGB rendering for a window with a True/DirectColor visual. 1024 */ 1025static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1026 XMesaWindow window, XMesaColormap cmap ) 1027{ 1028 unsigned long rmask, gmask, bmask; 1029 (void) buffer; 1030 (void) window; 1031 (void) cmap; 1032 1033 /* Compute red multiplier (mask) and bit shift */ 1034 v->rshift = 0; 1035 rmask = GET_REDMASK(v); 1036 while ((rmask & 1)==0) { 1037 v->rshift++; 1038 rmask = rmask >> 1; 1039 } 1040 1041 /* Compute green multiplier (mask) and bit shift */ 1042 v->gshift = 0; 1043 gmask = GET_GREENMASK(v); 1044 while ((gmask & 1)==0) { 1045 v->gshift++; 1046 gmask = gmask >> 1; 1047 } 1048 1049 /* Compute blue multiplier (mask) and bit shift */ 1050 v->bshift = 0; 1051 bmask = GET_BLUEMASK(v); 1052 while ((bmask & 1)==0) { 1053 v->bshift++; 1054 bmask = bmask >> 1; 1055 } 1056 1057 /* 1058 * Compute component-to-pixel lookup tables and dithering kernel 1059 */ 1060 { 1061 static GLubyte kernel[16] = { 1062 0*16, 8*16, 2*16, 10*16, 1063 12*16, 4*16, 14*16, 6*16, 1064 3*16, 11*16, 1*16, 9*16, 1065 15*16, 7*16, 13*16, 5*16, 1066 }; 1067 GLint rBits = bitcount(rmask); 1068 GLint gBits = bitcount(gmask); 1069 GLint bBits = bitcount(bmask); 1070 GLint maxBits; 1071 GLuint i; 1072 1073 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1074 for (i=0; i<=rmask; i++) 1075 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1076 for (i=0; i<=gmask; i++) 1077 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1078 for (i=0; i<=bmask; i++) 1079 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1080 1081 /* convert RGB values from [0,255] to pixel components */ 1082 1083 for (i=0;i<256;i++) { 1084 GLint r = gamma_adjust(v->RedGamma, i, 255); 1085 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1086 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1087 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1088 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1089 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1090 } 1091 /* overflow protection */ 1092 for (i=256;i<512;i++) { 1093 v->RtoPixel[i] = v->RtoPixel[255]; 1094 v->GtoPixel[i] = v->GtoPixel[255]; 1095 v->BtoPixel[i] = v->BtoPixel[255]; 1096 } 1097 1098 /* setup dithering kernel */ 1099 maxBits = rBits; 1100 if (gBits > maxBits) maxBits = gBits; 1101 if (bBits > maxBits) maxBits = bBits; 1102 for (i=0;i<16;i++) { 1103 v->Kernel[i] = kernel[i] >> maxBits; 1104 } 1105 1106 v->undithered_pf = PF_TRUECOLOR; 1107 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_TRUEDITHER : PF_TRUECOLOR; 1108 } 1109 1110 /* 1111 * Now check for TrueColor visuals which we can optimize. 1112 */ 1113 if ( GET_REDMASK(v) ==0x0000ff 1114 && GET_GREENMASK(v)==0x00ff00 1115 && GET_BLUEMASK(v) ==0xff0000 1116 && CHECK_BYTE_ORDER(v) 1117 && v->BitsPerPixel==32 1118 && sizeof(GLuint)==4 1119 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1120 /* common 32 bpp config used on SGI, Sun */ 1121 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1122 } 1123 else if (GET_REDMASK(v) ==0xff0000 1124 && GET_GREENMASK(v)==0x00ff00 1125 && GET_BLUEMASK(v) ==0x0000ff 1126 && CHECK_BYTE_ORDER(v) 1127 && v->BitsPerPixel==32 1128 && sizeof(GLuint)==4 1129 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1130 /* common 32 bpp config used on Linux, HP, IBM */ 1131 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1132 } 1133 else if (GET_REDMASK(v) ==0xff0000 1134 && GET_GREENMASK(v)==0x00ff00 1135 && GET_BLUEMASK(v) ==0x0000ff 1136 && CHECK_BYTE_ORDER(v) 1137 && v->BitsPerPixel==24 1138 && sizeof(GLuint)==4 1139 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1140 /* common packed 24 bpp config used on Linux */ 1141 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1142 } 1143 else if (GET_REDMASK(v) ==0xf800 1144 && GET_GREENMASK(v)==0x07e0 1145 && GET_BLUEMASK(v) ==0x001f 1146 && CHECK_BYTE_ORDER(v) 1147 && v->BitsPerPixel==16 1148 && sizeof(GLushort)==2 1149 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1150 /* 5-6-5 color weight on common PC VGA boards */ 1151 v->undithered_pf = PF_5R6G5B; 1152 v->dithered_pf = PF_DITHER_5R6G5B; 1153 } 1154 else if (GET_REDMASK(v) ==0xe0 1155 && GET_GREENMASK(v)==0x1c 1156 && GET_BLUEMASK(v) ==0x03 1157 && CHECK_FOR_HPCR(v)) { 1158 setup_8bit_hpcr( v ); 1159 } 1160} 1161 1162 1163 1164/* 1165 * Setup RGB rendering for a window with a monochrome visual. 1166 */ 1167static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1168{ 1169 (void) b; 1170 v->dithered_pf = v->undithered_pf = PF_1BIT; 1171 /* if black=1 then we must flip pixel values */ 1172 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1173} 1174 1175 1176 1177/* 1178 * When a context is "made current" for the first time, we can finally 1179 * finish initializing the context's visual and buffer information. 1180 * Input: v - the XMesaVisual to initialize 1181 * b - the XMesaBuffer to initialize (may be NULL) 1182 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1183 * window - the window/pixmap we're rendering into 1184 * cmap - the colormap associated with the window/pixmap 1185 * Return: GL_TRUE=success, GL_FALSE=failure 1186 */ 1187static GLboolean initialize_visual_and_buffer( int client, 1188 XMesaVisual v, 1189 XMesaBuffer b, 1190 GLboolean rgb_flag, 1191 XMesaDrawable window, 1192 XMesaColormap cmap 1193 ) 1194{ 1195#ifndef XFree86Server 1196 XGCValues gcvalues; 1197#endif 1198 1199 if (b) { 1200 assert(b->xm_visual == v); 1201 } 1202 1203 /* Save true bits/pixel */ 1204 v->BitsPerPixel = GET_BITS_PER_PIXEL(v); 1205 assert(v->BitsPerPixel > 0); 1206 1207 1208 if (rgb_flag==GL_FALSE) { 1209 /* COLOR-INDEXED WINDOW: 1210 * Even if the visual is TrueColor or DirectColor we treat it as 1211 * being color indexed. This is weird but might be useful to someone. 1212 */ 1213 v->dithered_pf = v->undithered_pf = PF_INDEX; 1214 v->index_bits = GET_VISUAL_DEPTH(v); 1215 } 1216 else { 1217 /* RGB WINDOW: 1218 * We support RGB rendering into almost any kind of visual. 1219 */ 1220 int xclass; 1221 xclass = GET_VISUAL_CLASS(v); 1222 if (xclass==TrueColor || xclass==DirectColor) { 1223 setup_truecolor( v, b, (XMesaWindow)window, cmap ); 1224 } 1225 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { 1226 setup_monochrome( v, b ); 1227 } 1228 else if (xclass==GrayScale || xclass==StaticGray) { 1229 if (!setup_grayscale( client, v, b, cmap )) { 1230 return GL_FALSE; 1231 } 1232 } 1233 else if ((xclass==PseudoColor || xclass==StaticColor) 1234 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1235 if (!setup_dithered_color( client, v, b, cmap )) { 1236 return GL_FALSE; 1237 } 1238 } 1239 else { 1240 error("XMesa: RGB mode rendering not supported in given visual."); 1241 return GL_FALSE; 1242 } 1243 v->index_bits = 0; 1244 1245 if (getenv("MESA_NO_DITHER")) { 1246 v->dithered_pf = v->undithered_pf; 1247 } 1248 } 1249 1250 1251 /* 1252 * If MESA_INFO env var is set print out some debugging info 1253 * which can help Brian figure out what's going on when a user 1254 * reports bugs. 1255 */ 1256 if (getenv("MESA_INFO")) { 1257 fprintf(stderr, "X/Mesa visual = %p\n", v); 1258 fprintf(stderr, "X/Mesa dithered pf = %u\n", v->dithered_pf); 1259 fprintf(stderr, "X/Mesa undithered pf = %u\n", v->undithered_pf); 1260 fprintf(stderr, "X/Mesa level = %d\n", v->level); 1261 fprintf(stderr, "X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1262 fprintf(stderr, "X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1263 } 1264 1265 if (b && window) { 1266 /* Do window-specific initializations */ 1267 1268 /* Window dimensions */ 1269 unsigned int w, h; 1270 get_drawable_size( v->display, window, &w, &h ); 1271 b->width = w; 1272 b->height = h; 1273 1274 b->frontbuffer = window; 1275 1276 assert( v->gl_visual ); 1277 1278 /* Setup for single/double buffering */ 1279 if (v->gl_visual->DBflag) { 1280 /* Double buffered */ 1281#ifndef XFree86Server 1282 b->shm = check_for_xshm( v->display ); 1283#endif 1284 xmesa_alloc_back_buffer( b ); 1285 if (b->db_state==BACK_PIXMAP) { 1286 b->buffer = (XMesaDrawable)b->backpixmap; 1287 } 1288 else { 1289 b->buffer = XIMAGE; 1290 } 1291 } 1292 else { 1293 /* Single Buffered */ 1294 b->buffer = b->frontbuffer; 1295 } 1296 1297 /* X11 graphics contexts */ 1298#ifdef XFree86Server 1299 b->gc = CreateScratchGC(v->display, window->depth); 1300#else 1301 b->gc = XCreateGC( v->display, window, 0, NULL ); 1302#endif 1303 XMesaSetFunction( v->display, b->gc, GXcopy ); 1304 1305 /* 1306 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1307 * Patch contributed by Michael Pichler May 15, 1995. 1308 */ 1309#ifdef XFree86Server 1310 b->cleargc = CreateScratchGC(v->display, window->depth); 1311 { 1312 CARD32 v[1]; 1313 v[0] = FALSE; 1314 dixChangeGC(NullClient, b->cleargc, GCGraphicsExposures, v, NULL); 1315 } 1316#else 1317 gcvalues.graphics_exposures = False; 1318 b->cleargc = XCreateGC( v->display, window, 1319 GCGraphicsExposures, &gcvalues); 1320#endif 1321 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1322 /* 1323 * Set fill style and tile pixmap once for all for HPCR stuff 1324 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1325 * Initialize whole stuff 1326 * Patch contributed by Jacques Leroy March 8, 1998. 1327 */ 1328 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1329 int i; 1330 for (i=0; i<16; i++) 1331 { 1332 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1333 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1334 } 1335 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1336 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1337 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1338 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1339 } 1340 1341 /* Initialize the row buffer XImage for use in write_color_span() */ 1342#ifdef XFree86Server 1343 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1344 (char *)MALLOC(MAX_WIDTH*4)); 1345#else 1346 b->rowimage = XCreateImage( v->display, 1347 v->visinfo->visual, 1348 v->visinfo->depth, 1349 ZPixmap, 0, /*format, offset*/ 1350 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1351 MAX_WIDTH, 1, /*width, height*/ 1352 32, /*bitmap_pad*/ 1353 0 /*bytes_per_line*/ ); 1354#endif 1355 } 1356 1357 return GL_TRUE; 1358} 1359 1360 1361 1362/* 1363 * Convert an RGBA color to a pixel value. 1364 */ 1365unsigned long 1366xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1367 GLuint pixelFormat) 1368{ 1369 switch (pixelFormat) { 1370 case PF_INDEX: 1371 return 0; 1372 case PF_TRUECOLOR: 1373 { 1374 unsigned long p; 1375 PACK_TRUECOLOR( p, r, g, b ); 1376 return p; 1377 } 1378 case PF_8A8B8G8R: 1379 return PACK_8A8B8G8R( r, g, b, a ); 1380 case PF_8R8G8B: 1381 /* fall through */ 1382 case PF_8R8G8B24: 1383 return PACK_8R8G8B( r, g, b ); 1384 case PF_5R6G5B: 1385 return PACK_5R6G5B( r, g, b ); 1386 case PF_DITHER: 1387 { 1388 DITHER_SETUP; 1389 return DITHER( 1, 0, r, g, b ); 1390 } 1391 case PF_1BIT: 1392 /* 382 = (3*255)/2 */ 1393 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1394 case PF_HPCR: 1395 return DITHER_HPCR(1, 1, r, g, b); 1396 case PF_LOOKUP: 1397 { 1398 LOOKUP_SETUP; 1399 return LOOKUP( r, g, b ); 1400 } 1401 case PF_GRAYSCALE: 1402 return GRAY_RGB( r, g, b ); 1403 case PF_TRUEDITHER: 1404 /* fall through */ 1405 case PF_DITHER_5R6G5B: 1406 { 1407 unsigned long p; 1408 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1409 return p; 1410 } 1411 default: 1412 gl_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1413 } 1414 return 0; 1415} 1416 1417 1418/**********************************************************************/ 1419/***** Public Functions *****/ 1420/**********************************************************************/ 1421 1422 1423/* 1424 * Create a new X/Mesa visual. 1425 * Input: display - X11 display 1426 * visinfo - an XVisualInfo pointer 1427 * rgb_flag - GL_TRUE = RGB mode, 1428 * GL_FALSE = color index mode 1429 * alpha_flag - alpha buffer requested? 1430 * db_flag - GL_TRUE = double-buffered, 1431 * GL_FALSE = single buffered 1432 * stereo_flag - stereo visual? 1433 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1434 * GL_FALSE = use an off-screen pixmap for back buffer 1435 * depth_size - requested bits/depth values, or zero 1436 * stencil_size - requested bits/stencil values, or zero 1437 * accum_red_size - requested bits/red accum values, or zero 1438 * accum_green_size - requested bits/green accum values, or zero 1439 * accum_blue_size - requested bits/blue accum values, or zero 1440 * accum_alpha_size - requested bits/alpha accum values, or zero 1441 * num_samples - number of samples/pixel if multisampling, or zero 1442 * level - visual level, usually 0 1443 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT 1444 * Return; a new XMesaVisual or 0 if error. 1445 */ 1446XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1447 XMesaVisualInfo visinfo, 1448 GLboolean rgb_flag, 1449 GLboolean alpha_flag, 1450 GLboolean db_flag, 1451 GLboolean stereo_flag, 1452 GLboolean ximage_flag, 1453 GLint depth_size, 1454 GLint stencil_size, 1455 GLint accum_red_size, 1456 GLint accum_green_size, 1457 GLint accum_blue_size, 1458 GLint accum_alpha_size, 1459 GLint num_samples, 1460 GLint level, 1461 GLint visualCaveat ) 1462{ 1463 char *gamma; 1464 XMesaVisual v; 1465 GLint red_bits, green_bits, blue_bits, alpha_bits; 1466 1467 /* For debugging only */ 1468 if (getenv("MESA_XSYNC")) { 1469 /* This makes debugging X easier. 1470 * In your debugger, set a breakpoint on _XError to stop when an 1471 * X protocol error is generated. 1472 */ 1473#ifdef XFree86Server 1474 /* NOT_NEEDED */ 1475#else 1476 XSynchronize( display, 1 ); 1477#endif 1478 } 1479 1480 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1481 if (!v) { 1482 return NULL; 1483 } 1484 1485 /* 1486 * In the X server, NULL is passed in for the display. It will have 1487 * to be set before using this visual. See XMesaSetVisualDisplay() 1488 * below. 1489 */ 1490 v->display = display; 1491 1492 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1493 * the struct but we may need some of the information contained in it 1494 * at a later time. 1495 */ 1496#ifdef XFree86Server 1497 v->visinfo = visinfo; 1498#else 1499 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1500 if(!v->visinfo) { 1501 FREE(v); 1502 return NULL; 1503 } 1504 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1505 1506 /* Save a copy of the pointer now so we can find this visual again 1507 * if we need to search for it in find_glx_visual(). 1508 */ 1509 v->vishandle = visinfo; 1510#endif 1511 1512#ifdef XFree86Server 1513 /* Initialize the depth of the screen */ 1514 { 1515 PixmapFormatRec *format; 1516 1517 for (format = screenInfo.formats; 1518 format->depth != display->rootDepth; 1519 format++) 1520 ; 1521 v->screen_depth = format->bitsPerPixel; 1522 } 1523#endif 1524 1525 /* check for MESA_GAMMA environment variable */ 1526 gamma = getenv("MESA_GAMMA"); 1527 if (gamma) { 1528 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1529 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1530 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1531 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1532 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1533 } 1534 else { 1535 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1536 } 1537 1538 v->ximage_flag = ximage_flag; 1539 v->level = level; 1540 v->VisualCaveat = visualCaveat; 1541 1542 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1543 1544 { 1545 int xclass; 1546 xclass = GET_VISUAL_CLASS(v); 1547 if (xclass==TrueColor || xclass==DirectColor) { 1548 red_bits = bitcount(GET_REDMASK(v)); 1549 green_bits = bitcount(GET_GREENMASK(v)); 1550 blue_bits = bitcount(GET_BLUEMASK(v)); 1551 alpha_bits = 0; 1552 } 1553 else { 1554 /* this is an approximation */ 1555 int depth; 1556 depth = GET_VISUAL_DEPTH(v); 1557 red_bits = depth / 3; 1558 depth -= red_bits; 1559 green_bits = depth / 2; 1560 depth -= green_bits; 1561 blue_bits = depth; 1562 alpha_bits = 0; 1563 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1564 } 1565 } 1566 1567 if (alpha_flag && alpha_bits == 0) 1568 alpha_bits = 8; 1569 1570 v->gl_visual = _mesa_create_visual( rgb_flag, db_flag, stereo_flag, 1571 red_bits, green_bits, 1572 blue_bits, alpha_bits, 1573 v->index_bits, 1574 depth_size, 1575 stencil_size, 1576 accum_red_size, accum_green_size, 1577 accum_blue_size, accum_alpha_size, 1578 0 ); 1579 if (!v->gl_visual) { 1580#ifndef XFree86Server 1581 FREE(v->visinfo); 1582#endif 1583 FREE(v); 1584 return NULL; 1585 } 1586 1587 return v; 1588} 1589 1590 1591void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1592{ 1593 v->display = dpy; 1594} 1595 1596 1597void XMesaDestroyVisual( XMesaVisual v ) 1598{ 1599 _mesa_destroy_visual( v->gl_visual ); 1600#ifndef XFree86Server 1601 FREE(v->visinfo); 1602#endif 1603 FREE(v); 1604} 1605 1606 1607 1608/* 1609 * Create a new XMesaContext. 1610 * Input: v - XMesaVisual 1611 * share_list - another XMesaContext with which to share display 1612 * lists or NULL if no sharing is wanted. 1613 * Return: an XMesaContext or NULL if error. 1614 */ 1615XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1616{ 1617 XMesaContext c; 1618 GLcontext *ctx; 1619 GLboolean direct = GL_TRUE; /* XXXX */ 1620 /* NOT_DONE: should this be GL_FALSE??? */ 1621 static GLboolean firstTime = GL_TRUE; 1622 1623 if (firstTime) { 1624 _glthread_INIT_MUTEX(_xmesa_lock); 1625 firstTime = GL_FALSE; 1626 } 1627 1628 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1629 if (!c) { 1630 return NULL; 1631 } 1632 1633 ctx = c->gl_ctx = _mesa_create_context( v->gl_visual, 1634 share_list ? share_list->gl_ctx : (GLcontext *) NULL, 1635 (void *) c, direct ); 1636 if (!c->gl_ctx) { 1637 FREE(c); 1638 return NULL; 1639 } 1640 1641 _mesa_enable_sw_extensions(ctx); 1642 1643 if (CHECK_BYTE_ORDER(v)) { 1644 c->swapbytes = GL_FALSE; 1645 } 1646 else { 1647 c->swapbytes = GL_TRUE; 1648 } 1649 1650 c->xm_visual = v; 1651 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1652 c->display = v->display; 1653 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1654 1655 ctx->Driver.UpdateState = xmesa_update_state; 1656 1657#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1658 c->driContextPriv = driContextPriv; 1659#endif 1660 1661 /* Set up some constant pointers: 1662 */ 1663 xmesa_init_pointers( ctx ); 1664 1665 /* Initialize the software rasterizer and helper modules. 1666 */ 1667 _swrast_CreateContext( ctx ); 1668 _swsetup_CreateContext( ctx ); 1669 _tnl_CreateContext( ctx ); 1670 1671 xmesa_register_swrast_functions( ctx ); 1672 1673 /* Run the config file 1674 */ 1675 _mesa_context_initialize( ctx ); 1676 1677 1678 return c; 1679} 1680 1681 1682 1683 1684void XMesaDestroyContext( XMesaContext c ) 1685{ 1686#ifdef FX 1687 if (c->xm_buffer && c->xm_buffer->FXctx) 1688 fxMesaDestroyContext(c->xm_buffer->FXctx); 1689#endif 1690 if (c->gl_ctx) { 1691 _swsetup_DestroyContext( c->gl_ctx ); 1692 _swrast_DestroyContext( c->gl_ctx ); 1693 _mesa_destroy_context( c->gl_ctx ); 1694 } 1695 1696 /* Disassociate old buffer with this context */ 1697 if (c->xm_buffer) 1698 c->xm_buffer->xm_context = NULL; 1699 1700 /* Destroy any buffers which are using this context. If we don't 1701 * we may have dangling references. Hmm, maybe we should just 1702 * set the buffer's context pointer to NULL instead of deleting it? 1703 * Let's see if we get any bug reports... 1704 * This contributed by Doug Rabson <dfr@calcaphon.com> 1705 */ 1706 { 1707 XMesaBuffer b, next; 1708 for (b = XMesaBufferList; b; b = next) { 1709 next = b->Next; 1710 if (!b->pixmap_flag) { 1711#ifndef XFree86Server 1712 XSync(b->display, False); 1713#endif 1714 if (b->xm_context == c) { 1715 /* found a context created for this context */ 1716 XMesaDestroyBuffer( b ); 1717 } 1718 } 1719 } 1720 } 1721 1722 FREE( c ); 1723} 1724 1725 1726 1727/* 1728 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1729 * Create a new XMesaBuffer from an X window. 1730 * Input: v - the XMesaVisual 1731 * w - the window 1732 * c - the context 1733 * Return: new XMesaBuffer or NULL if error 1734 */ 1735XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1736 XMesaContext c ) 1737{ 1738#ifndef XFree86Server 1739 XWindowAttributes attr; 1740#endif 1741#ifdef FX 1742 char *fxEnvVar; 1743#endif 1744 int client = 0; 1745 1746 XMesaBuffer b = alloc_xmesa_buffer(); 1747 if (!b) { 1748 return NULL; 1749 } 1750 1751 (void) c; 1752 1753#ifdef XFree86Server 1754 client = CLIENT_ID(((XMesaDrawable)w)->id); 1755#endif 1756 1757 assert(v); 1758 1759#ifdef XFree86Server 1760 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1761#else 1762 XGetWindowAttributes( v->display, w, &attr ); 1763 1764 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1765#endif 1766 if (getenv("MESA_DEBUG")) { 1767 fprintf(stderr, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1768 } 1769 return NULL; 1770 } 1771 1772 b->xm_context = NULL; /* Associate no context with this buffer */ 1773 1774 b->xm_visual = v; 1775 b->pixmap_flag = GL_FALSE; 1776 b->display = v->display; 1777#ifdef XFree86Server 1778 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1779#else 1780 if (attr.colormap) { 1781 b->cmap = attr.colormap; 1782 } 1783 else { 1784 if (getenv("MESA_DEBUG")) { 1785 fprintf(stderr, "Window %u has no colormap!\n", (unsigned int) w); 1786 } 1787 /* this is weird, a window w/out a colormap!? */ 1788 /* OK, let's just allocate a new one and hope for the best */ 1789 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1790 } 1791#endif 1792 1793 /* determine back buffer implementation */ 1794 if (v->gl_visual->DBflag) { 1795 if (v->ximage_flag) { 1796 b->db_state = BACK_XIMAGE; 1797 } 1798 else { 1799 b->db_state = BACK_PIXMAP; 1800 } 1801 } 1802 else { 1803 b->db_state = 0; 1804 } 1805 1806 b->gl_buffer = _mesa_create_framebuffer( v->gl_visual, 1807 v->gl_visual->DepthBits > 0, 1808 v->gl_visual->StencilBits > 0, 1809 v->gl_visual->AccumRedBits > 0, 1810 v->gl_visual->AlphaBits > 0 ); 1811 if (!b->gl_buffer) { 1812 free_xmesa_buffer(client, b); 1813 return NULL; 1814 } 1815 1816 if (!initialize_visual_and_buffer( client, v, b, v->gl_visual->RGBAflag, 1817 (XMesaDrawable)w, b->cmap )) { 1818 _mesa_destroy_framebuffer( b->gl_buffer ); 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->gl_visual->DepthBits > 0) { 1831 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1832 attribs[numAttribs++] = 1; 1833 } 1834 if (v->gl_visual->DBflag) { 1835 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1836 } 1837 if (v->gl_visual->AccumRedBits > 0) { 1838 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1839 attribs[numAttribs++] = v->gl_visual->AccumRedBits; 1840 } 1841 if (v->gl_visual->StencilBits > 0) { 1842 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1843 attribs[numAttribs++] = v->gl_visual->StencilBits; 1844 } 1845 if (v->gl_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#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1891 b->driDrawPriv = driDrawPriv; 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->gl_visual->DBflag) { 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 b->gl_buffer = _mesa_create_framebuffer( v->gl_visual, 1949 v->gl_visual->DepthBits > 0, 1950 v->gl_visual->StencilBits > 0, 1951 v->gl_visual->AccumRedBits + 1952 v->gl_visual->AccumGreenBits + 1953 v->gl_visual->AccumBlueBits > 0, 1954 v->gl_visual->AlphaBits > 0 ); 1955 if (!b->gl_buffer) { 1956 free_xmesa_buffer(client, b); 1957 return NULL; 1958 } 1959 1960 if (!initialize_visual_and_buffer(client, v, b, v->gl_visual->RGBAflag, 1961 (XMesaDrawable)p, cmap)) { 1962 _mesa_destroy_framebuffer( b->gl_buffer ); 1963 free_xmesa_buffer(client, b); 1964 return NULL; 1965 } 1966 1967#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1968 b->driDrawPriv = driDrawPriv; 1969#endif 1970 1971 return b; 1972} 1973 1974 1975 1976/* 1977 * Deallocate an XMesaBuffer structure and all related info. 1978 */ 1979void XMesaDestroyBuffer( XMesaBuffer b ) 1980{ 1981 int client = 0; 1982 1983#ifdef XFree86Server 1984 if (b->frontbuffer) 1985 client = CLIENT_ID(b->frontbuffer->id); 1986#endif 1987 1988 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1989 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1990 1991 if (b->backimage) { 1992#if defined(USE_XSHM) && !defined(XFree86Server) 1993 if (b->shm) { 1994 XShmDetach( b->xm_visual->display, &b->shminfo ); 1995 XDestroyImage( b->backimage ); 1996 shmdt( b->shminfo.shmaddr ); 1997 } 1998 else 1999#endif 2000 XMesaDestroyImage( b->backimage ); 2001 } 2002 if (b->backpixmap) { 2003 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 2004 if (b->xm_visual->hpcr_clear_flag) { 2005 XMesaFreePixmap( b->xm_visual->display, 2006 b->xm_visual->hpcr_clear_pixmap ); 2007 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 2008 } 2009 } 2010 if (b->rowimage) { 2011 FREE( b->rowimage->data ); 2012 b->rowimage->data = NULL; 2013 XMesaDestroyImage( b->rowimage ); 2014 } 2015 2016 if (b->xm_context) 2017 b->xm_context->xm_buffer = NULL; 2018 2019 _mesa_destroy_framebuffer( b->gl_buffer ); 2020 free_xmesa_buffer(client, b); 2021} 2022 2023 2024 2025/* 2026 * Bind buffer b to context c and make c the current rendering context. 2027 */ 2028GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2029{ 2030 return XMesaMakeCurrent2( c, b, b ); 2031} 2032 2033 2034/* 2035 * Bind buffer b to context c and make c the current rendering context. 2036 */ 2037GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2038 XMesaBuffer readBuffer ) 2039{ 2040 if (c) { 2041 if (!drawBuffer || !readBuffer) 2042 return GL_FALSE; /* must specify buffers! */ 2043 2044#ifdef FX 2045 if (drawBuffer->FXctx) { 2046 fxMesaMakeCurrent(drawBuffer->FXctx); 2047 2048 /* Disassociate old buffer from this context */ 2049 if (c->xm_buffer) 2050 c->xm_buffer->xm_context = NULL; 2051 2052 /* Associate the context with this buffer */ 2053 drawBuffer->xm_context = c; 2054 2055 c->xm_buffer = drawBuffer; 2056 c->xm_read_buffer = readBuffer; 2057 c->use_read_buffer = (drawBuffer != readBuffer); 2058 2059 return GL_TRUE; 2060 } 2061#endif 2062 if (c->gl_ctx == _mesa_get_current_context() 2063 && c->xm_buffer == drawBuffer 2064 && c->xm_read_buffer == readBuffer 2065 && c->xm_buffer->wasCurrent) { 2066 /* same context and buffer, do nothing */ 2067 return GL_TRUE; 2068 } 2069 2070 /* Disassociate old buffer with this context */ 2071 if (c->xm_buffer) 2072 c->xm_buffer->xm_context = NULL; 2073 drawBuffer->xm_context = c; /* Associate the context with this buffer */ 2074 2075 c->xm_buffer = drawBuffer; 2076 c->xm_read_buffer = readBuffer; 2077 c->use_read_buffer = (drawBuffer != readBuffer); 2078 2079 _mesa_make_current2(c->gl_ctx, drawBuffer->gl_buffer, readBuffer->gl_buffer); 2080 2081 if (c->gl_ctx->Viewport.Width == 0) { 2082 /* initialize viewport to window size */ 2083 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2084 c->gl_ctx->Scissor.Width = drawBuffer->width; 2085 c->gl_ctx->Scissor.Height = drawBuffer->height; 2086 } 2087 2088 if (c->xm_visual->gl_visual->RGBAflag) { 2089 /* 2090 * Must recompute and set these pixel values because colormap 2091 * can be different for different windows. 2092 */ 2093 c->clearpixel = xmesa_color_to_pixel( c, 2094 c->clearcolor[0], 2095 c->clearcolor[1], 2096 c->clearcolor[2], 2097 c->clearcolor[3], 2098 c->xm_visual->undithered_pf); 2099 XMesaSetForeground(c->display, c->xm_buffer->cleargc, c->clearpixel); 2100 } 2101 2102 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2103 c->xm_buffer->wasCurrent = GL_TRUE; 2104 } 2105 else { 2106 /* Detach */ 2107 _mesa_make_current2( NULL, NULL, NULL ); 2108 } 2109 return GL_TRUE; 2110} 2111 2112 2113/* 2114 * Unbind the context c from its buffer. 2115 */ 2116GLboolean XMesaUnbindContext( XMesaContext c ) 2117{ 2118 /* A no-op for XFree86 integration purposes */ 2119 return GL_TRUE; 2120} 2121 2122 2123XMesaContext XMesaGetCurrentContext( void ) 2124{ 2125 GET_CURRENT_CONTEXT(ctx); 2126 if (ctx) { 2127 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2128 return xmesa; 2129 } 2130 else { 2131 return 0; 2132 } 2133} 2134 2135 2136XMesaBuffer XMesaGetCurrentBuffer( void ) 2137{ 2138 GET_CURRENT_CONTEXT(ctx); 2139 if (ctx) { 2140 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2141 return xmesa->xm_buffer; 2142 } 2143 else { 2144 return 0; 2145 } 2146} 2147 2148 2149/* New in Mesa 3.1 */ 2150XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2151{ 2152 GET_CURRENT_CONTEXT(ctx); 2153 if (ctx) { 2154 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2155 return xmesa->xm_buffer; 2156 } 2157 else { 2158 return 0; 2159 } 2160} 2161 2162 2163GLboolean XMesaForceCurrent(XMesaContext c) 2164{ 2165 if (c) { 2166 if (c->gl_ctx != _mesa_get_current_context()) { 2167 _mesa_make_current(c->gl_ctx, c->xm_buffer->gl_buffer); 2168 } 2169 } 2170 else { 2171 _mesa_make_current(NULL, NULL); 2172 } 2173 return GL_TRUE; 2174} 2175 2176 2177GLboolean XMesaLoseCurrent(XMesaContext c) 2178{ 2179 (void) c; 2180 _mesa_make_current(NULL, NULL); 2181 return GL_TRUE; 2182} 2183 2184 2185/* 2186 * Switch 3Dfx support hack between window and full-screen mode. 2187 */ 2188GLboolean XMesaSetFXmode( GLint mode ) 2189{ 2190#ifdef FX 2191 const char *fx = getenv("MESA_GLX_FX"); 2192 if (fx && fx[0] != 'd') { 2193 GET_CURRENT_CONTEXT(ctx); 2194 GrHwConfiguration hw; 2195 if (!FX_grSstQueryHardware(&hw)) { 2196 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2197 return GL_FALSE; 2198 } 2199 if (hw.num_sst < 1) { 2200 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2201 return GL_FALSE; 2202 } 2203 if (ctx) { 2204 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2205 if (mode == XMESA_FX_WINDOW) { 2206 if (xmesa->xm_buffer->FXisHackUsable) { 2207 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2208 xmesa->xm_buffer->FXwindowHack = GL_TRUE; 2209 return GL_TRUE; 2210 } 2211 } 2212 else if (mode == XMESA_FX_FULLSCREEN) { 2213 FX_grSstControl(GR_CONTROL_ACTIVATE); 2214 xmesa->xm_buffer->FXwindowHack = GL_FALSE; 2215 return GL_TRUE; 2216 } 2217 else { 2218 /* Error: Bad mode value */ 2219 } 2220 } 2221 } 2222 /*fprintf(stderr, "fallthrough\n");*/ 2223#else 2224 (void) mode; 2225#endif 2226 return GL_FALSE; 2227} 2228 2229 2230 2231#ifdef FX 2232/* 2233 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2234 */ 2235static void FXgetImage( XMesaBuffer b ) 2236{ 2237 static unsigned short pixbuf[MAX_WIDTH]; 2238 int x, y; 2239 XMesaWindow root; 2240 unsigned int bw, depth, width, height; 2241 XMesaContext xmesa = (XMesaContext) b->xm_context->gl_ctx->DriverCtx; 2242 2243 assert(xmesa->xm_buffer->FXctx); 2244 2245#ifdef XFree86Server 2246 x = b->frontbuffer->x; 2247 y = b->frontbuffer->y; 2248 width = b->frontbuffer->width; 2249 height = b->frontbuffer->height; 2250 depth = b->frontbuffer->depth; 2251#else 2252 XGetGeometry( xmesa->xm_visual->display, b->frontbuffer, 2253 &root, &x, &y, &width, &height, &bw, &depth); 2254#endif 2255 if (b->width != width || b->height != height) { 2256 b->width = MIN2((int)width, xmesa->xm_buffer->FXctx->width); 2257 b->height = MIN2((int)height, xmesa->xm_buffer->FXctx->height); 2258 if (b->width & 1) 2259 b->width--; /* prevent odd width */ 2260 xmesa_alloc_back_buffer( b ); 2261 } 2262 2263 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2264 if (xmesa->xm_visual->undithered_pf==PF_5R6G5B) { 2265 /* Special case: 16bpp RGB */ 2266 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2267 0, xmesa->xm_buffer->FXctx->height - b->height, /*pos*/ 2268 b->width, b->height, /* size */ 2269 b->width * sizeof(GLushort), /* stride */ 2270 b->backimage->data); /* dest buffer */ 2271 } 2272 else if (xmesa->xm_visual->dithered_pf==PF_DITHER 2273 && GET_VISUAL_DEPTH(xmesa->xm_visual)==8) { 2274 /* Special case: 8bpp RGB */ 2275 for (y=0;y<b->height;y++) { 2276 GLubyte *ptr = (GLubyte*) xmesa->xm_buffer->backimage->data 2277 + xmesa->xm_buffer->backimage->bytes_per_line * y; 2278 XDITHER_SETUP(y); 2279 2280 /* read row from 3Dfx frame buffer */ 2281 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2282 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2283 b->width, 1, 2284 0, 2285 pixbuf ); 2286 2287 /* write to XImage back buffer */ 2288 for (x=0;x<b->width;x++) { 2289 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2290 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2291 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2292 *ptr++ = XDITHER( x, r, g, b); 2293 } 2294 } 2295 } 2296 else { 2297 /* General case: slow! */ 2298 for (y=0;y<b->height;y++) { 2299 /* read row from 3Dfx frame buffer */ 2300 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2301 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2302 b->width, 1, 2303 0, 2304 pixbuf ); 2305 2306 /* write to XImage back buffer */ 2307 for (x=0;x<b->width;x++) { 2308 XMesaPutPixel(b->backimage,x,y, 2309 xmesa_color_to_pixel(xmesa, 2310 (pixbuf[x] & 0xf800) >> 8, 2311 (pixbuf[x] & 0x07e0) >> 3, 2312 (pixbuf[x] & 0x001f) << 3, 2313 0xff, xmesa->pixelformat)); 2314 } 2315 } 2316 } 2317 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2318} 2319#endif 2320 2321 2322/* 2323 * Copy the back buffer to the front buffer. If there's no back buffer 2324 * this is a no-op. 2325 */ 2326void XMesaSwapBuffers( XMesaBuffer b ) 2327{ 2328 GET_CURRENT_CONTEXT(ctx); 2329 2330 /* If we're swapping the buffer associated with the current context 2331 * we have to flush any pending rendering commands first. 2332 */ 2333 if (b->xm_context && b->xm_context->gl_ctx == ctx) 2334 _mesa_swapbuffers(ctx); 2335 2336 if (b->db_state) { 2337#ifdef FX 2338 if (b->FXctx) { 2339 fxMesaSwapBuffers(); 2340 2341 if (b->FXwindowHack) 2342 FXgetImage(b); 2343 else 2344 return; 2345 } 2346#endif 2347 if (b->backimage) { 2348 /* Copy Ximage from host's memory to server's window */ 2349#if defined(USE_XSHM) && !defined(XFree86Server) 2350 if (b->shm) { 2351 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2352 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2353 b->cleargc, 2354 b->backimage, 0, 0, 2355 0, 0, b->width, b->height, False ); 2356 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2357 } 2358 else 2359#endif 2360 { 2361#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 2362 XMesaDriSwapBuffers( b ); 2363#else 2364 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2365 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2366 b->cleargc, 2367 b->backimage, 0, 0, 2368 0, 0, b->width, b->height ); 2369 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2370#endif 2371 } 2372 } 2373 else { 2374 /* Copy pixmap to window on server */ 2375 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2376 XMesaCopyArea( b->xm_visual->display, 2377 b->backpixmap, /* source drawable */ 2378 b->frontbuffer, /* dest. drawable */ 2379 b->cleargc, 2380 0, 0, b->width, b->height, /* source region */ 2381 0, 0 /* dest region */ 2382 ); 2383 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2384 } 2385 } 2386#if !defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 2387 XSync( b->xm_visual->display, False ); 2388#endif 2389} 2390 2391 2392 2393/* 2394 * Copy sub-region of back buffer to front buffer 2395 */ 2396void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2397{ 2398 GET_CURRENT_CONTEXT(ctx); 2399 2400 /* If we're swapping the buffer associated with the current context 2401 * we have to flush any pending rendering commands first. 2402 */ 2403 if (b->xm_context->gl_ctx == ctx) 2404 _mesa_swapbuffers(ctx); 2405 2406 if (b->db_state) { 2407 int yTop = b->height - y - height; 2408#ifdef FX 2409 if (b->FXctx) { 2410 fxMesaSwapBuffers(); 2411 if (b->FXwindowHack) 2412 FXgetImage(b); 2413 else 2414 return; 2415 } 2416#endif 2417 if (b->backimage) { 2418 /* Copy Ximage from host's memory to server's window */ 2419#if defined(USE_XSHM) && !defined(XFree86Server) 2420 if (b->shm) { 2421 /* XXX assuming width and height aren't too large! */ 2422 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2423 b->cleargc, 2424 b->backimage, x, yTop, 2425 x, yTop, width, height, False ); 2426 /* wait for finished event??? */ 2427 } 2428 else 2429#endif 2430 { 2431 /* XXX assuming width and height aren't too large! */ 2432 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2433 b->cleargc, 2434 b->backimage, x, yTop, 2435 x, yTop, width, height ); 2436 } 2437 } 2438 else { 2439 /* Copy pixmap to window on server */ 2440 XMesaCopyArea( b->xm_visual->display, 2441 b->backpixmap, /* source drawable */ 2442 b->frontbuffer, /* dest. drawable */ 2443 b->cleargc, 2444 x, yTop, width, height, /* source region */ 2445 x, yTop /* dest region */ 2446 ); 2447 } 2448 } 2449} 2450 2451 2452/* 2453 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2454 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2455 * back buffer directly. 2456 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2457 * ximage - pointer to back buffer's XImage, or NULL 2458 * Return: GL_TRUE = context is double buffered 2459 * GL_FALSE = context is single buffered 2460 */ 2461GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2462 XMesaPixmap *pixmap, 2463 XMesaImage **ximage ) 2464{ 2465 if (b->db_state) { 2466 if (pixmap) *pixmap = b->backpixmap; 2467 if (ximage) *ximage = b->backimage; 2468 return GL_TRUE; 2469 } 2470 else { 2471 *pixmap = 0; 2472 *ximage = NULL; 2473 return GL_FALSE; 2474 } 2475} 2476 2477 2478/* 2479 * Return the depth buffer associated with an XMesaBuffer. 2480 * Input: b - the XMesa buffer handle 2481 * Output: width, height - size of buffer in pixels 2482 * bytesPerValue - bytes per depth value (2 or 4) 2483 * buffer - pointer to depth buffer values 2484 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2485 */ 2486GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2487 GLint *bytesPerValue, void **buffer ) 2488{ 2489 if ((!b->gl_buffer) || (!b->gl_buffer->DepthBuffer)) { 2490 *width = 0; 2491 *height = 0; 2492 *bytesPerValue = 0; 2493 *buffer = 0; 2494 return GL_FALSE; 2495 } 2496 else { 2497 *width = b->gl_buffer->Width; 2498 *height = b->gl_buffer->Height; 2499 *bytesPerValue = sizeof(GLdepth); 2500 *buffer = b->gl_buffer->DepthBuffer; 2501 return GL_TRUE; 2502 } 2503} 2504 2505 2506void XMesaFlush( XMesaContext c ) 2507{ 2508 if (c && c->xm_visual) { 2509#ifdef XFree86Server 2510 /* NOT_NEEDED */ 2511#else 2512 XSync( c->xm_visual->display, False ); 2513#endif 2514 } 2515} 2516 2517 2518 2519const char *XMesaGetString( XMesaContext c, int name ) 2520{ 2521 (void) c; 2522 if (name==XMESA_VERSION) { 2523 return "3.1"; 2524 } 2525 else if (name==XMESA_EXTENSIONS) { 2526 return ""; 2527 } 2528 else { 2529 return NULL; 2530 } 2531} 2532 2533 2534 2535XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2536{ 2537 XMesaBuffer b; 2538 for (b=XMesaBufferList; b; b=b->Next) { 2539 if (b->frontbuffer==d && b->display==dpy) { 2540 return b; 2541 } 2542 } 2543 return NULL; 2544} 2545 2546 2547 2548/* 2549 * Look for XMesaBuffers whose X window has been destroyed. 2550 * Deallocate any such XMesaBuffers. 2551 */ 2552void XMesaGarbageCollect( void ) 2553{ 2554 XMesaBuffer b, next; 2555 for (b=XMesaBufferList; b; b=next) { 2556 next = b->Next; 2557 if (!b->pixmap_flag) { 2558#ifdef XFree86Server 2559 /* NOT_NEEDED */ 2560#else 2561 XSync(b->display, False); 2562 if (!window_exists( b->display, b->frontbuffer )) { 2563 /* found a dead window, free the ancillary info */ 2564 XMesaDestroyBuffer( b ); 2565 } 2566#endif 2567 } 2568 } 2569} 2570 2571 2572void XMesaReset( void ) 2573{ 2574 while (XMesaBufferList) 2575 XMesaDestroyBuffer(XMesaBufferList); 2576 2577 XMesaBufferList = NULL; 2578} 2579 2580 2581unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2582 GLfloat red, GLfloat green, 2583 GLfloat blue, GLfloat alpha ) 2584{ 2585 GLint r = (GLint) (red * 255.0F); 2586 GLint g = (GLint) (green * 255.0F); 2587 GLint b = (GLint) (blue * 255.0F); 2588 GLint a = (GLint) (alpha * 255.0F); 2589 2590 switch (xmesa->pixelformat) { 2591 case PF_INDEX: 2592 return 0; 2593 case PF_TRUECOLOR: 2594 { 2595 unsigned long p; 2596 PACK_TRUECOLOR( p, r, g, b ); 2597 return p; 2598 } 2599 case PF_8A8B8G8R: 2600 return PACK_8A8B8G8R( r, g, b, a ); 2601 case PF_8R8G8B: 2602 return PACK_8R8G8B( r, g, b ); 2603 case PF_5R6G5B: 2604 return PACK_5R6G5B( r, g, b ); 2605 case PF_DITHER: 2606 { 2607 DITHER_SETUP; 2608 return DITHER( x, y, r, g, b ); 2609 } 2610 case PF_1BIT: 2611 /* 382 = (3*255)/2 */ 2612 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2613 case PF_HPCR: 2614 return DITHER_HPCR(x, y, r, g, b); 2615 case PF_LOOKUP: 2616 { 2617 LOOKUP_SETUP; 2618 return LOOKUP( r, g, b ); 2619 } 2620 case PF_GRAYSCALE: 2621 return GRAY_RGB( r, g, b ); 2622 case PF_DITHER_5R6G5B: 2623 /* fall through */ 2624 case PF_TRUEDITHER: 2625 { 2626 unsigned long p; 2627 PACK_TRUEDITHER(p, x, y, r, g, b); 2628 return p; 2629 } 2630 default: 2631 gl_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2632 } 2633 return 0; 2634} 2635 2636 2637