xm_api.c revision e9e98405e720845f06f7a375585491e938f4dacd
1/* 2 * Mesa 3-D graphics library 3 * Version: 5.1 4 * 5 * Copyright (C) 1999-2003 Brian Paul All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included 15 * in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25/* 26 * This file contains the implementations of all the XMesa* functions. 27 * 28 * 29 * NOTES: 30 * 31 * The window coordinate system origin (0,0) is in the lower-left corner 32 * of the window. X11's window coordinate origin is in the upper-left 33 * corner of the window. Therefore, most drawing functions in this 34 * file have to flip Y coordinates. 35 * 36 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 37 * in support for the MIT Shared Memory extension. If enabled, when you 38 * use an Ximage for the back buffer in double buffered mode, the "swap" 39 * operation will be faster. You must also link with -lXext. 40 * 41 * Byte swapping: If the Mesa host and the X display use a different 42 * byte order then there's some trickiness to be aware of when using 43 * XImages. The byte ordering used for the XImage is that of the X 44 * display, not the Mesa host. 45 * The color-to-pixel encoding for True/DirectColor must be done 46 * according to the display's visual red_mask, green_mask, and blue_mask. 47 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 48 * do byte swapping if needed. If one wants to directly "poke" the pixel 49 * into the XImage's buffer then the pixel must be byte swapped first. In 50 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 51 * and use XPutPixel everywhere except in the implementation of 52 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 53 * instead of using XPutPixel we "poke" our values after byte-swapping 54 * the clear pixel value if needed. 55 * 56 */ 57 58#ifdef __CYGWIN__ 59#undef WIN32 60#undef __WIN32__ 61#endif 62 63#include "glxheader.h" 64#include "GL/xmesa.h" 65#include "xmesaP.h" 66#include "context.h" 67#include "extensions.h" 68#include "glthread.h" 69#include "imports.h" 70#include "matrix.h" 71#include "mtypes.h" 72#include "macros.h" 73#include "texformat.h" 74#include "texobj.h" 75#include "texstore.h" 76#include "swrast/swrast.h" 77#include "swrast_setup/swrast_setup.h" 78#include "array_cache/acache.h" 79#include "tnl/tnl.h" 80 81#ifndef GLX_NONE_EXT 82#define GLX_NONE_EXT 0x8000 83#endif 84 85 86/* 87 * Global X driver lock 88 */ 89_glthread_Mutex _xmesa_lock; 90 91 92 93/* 94 * Lookup tables for HPCR pixel format: 95 */ 96static short hpcr_rgbTbl[3][256] = { 97{ 98 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 99 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 100 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 101 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 102 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 103 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 104 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 105 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 106112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 107128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 108144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 109160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 110176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 111192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 112208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 113224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 114}, 115{ 116 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 117 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 118 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 119 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 120 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 121 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 122 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 123 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 124112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 125128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 126144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 127160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 128176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 129192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 130208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 131224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 132}, 133{ 134 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 135 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 136 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 137 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 138 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 139 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 140 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 141 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 142 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 143112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 144128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 145144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 146160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 147176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 148192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 149208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 150} 151}; 152 153 154 155/**********************************************************************/ 156/***** X Utility Functions *****/ 157/**********************************************************************/ 158 159 160/* 161 * Return the host's byte order as LSBFirst or MSBFirst ala X. 162 */ 163#ifndef XFree86Server 164static int host_byte_order( void ) 165{ 166 int i = 1; 167 char *cptr = (char *) &i; 168 return (*cptr==1) ? LSBFirst : MSBFirst; 169} 170#endif 171 172 173/* 174 * Error handling. 175 */ 176#ifndef XFree86Server 177static volatile int mesaXErrorFlag = 0; 178 179static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 180{ 181 (void) dpy; 182 (void) event; 183 mesaXErrorFlag = 1; 184 return 0; 185} 186#endif 187 188 189/* 190 * Check if the X Shared Memory extension is available. 191 * Return: 0 = not available 192 * 1 = shared XImage support available 193 * 2 = shared Pixmap support available also 194 */ 195#ifndef XFree86Server 196static int check_for_xshm( XMesaDisplay *display ) 197{ 198#ifdef USE_XSHM 199 int major, minor, ignore; 200 Bool pixmaps; 201 202 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 203 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 204 return (pixmaps==True) ? 2 : 1; 205 } 206 else { 207 return 0; 208 } 209 } 210 else { 211 return 0; 212 } 213#else 214 /* Can't compile XSHM support */ 215 return 0; 216#endif 217} 218#endif 219 220 221/* 222 * Return the width and height of the given drawable. 223 */ 224static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 225 unsigned int *width, unsigned int *height) 226{ 227#ifdef XFree86Server 228 (void) dpy; 229 *width = d->width; 230 *height = d->height; 231#else 232 Window root; 233 int x, y; 234 unsigned int bw, depth; 235 236 _glthread_LOCK_MUTEX(_xmesa_lock); 237 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 238 _glthread_UNLOCK_MUTEX(_xmesa_lock); 239#endif 240} 241 242 243/* 244 * Apply gamma correction to an intensity value in [0..max]. Return the 245 * new intensity value. 246 */ 247static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 248{ 249 if (gamma == 1.0) { 250 return value; 251 } 252 else { 253 double x = (double) value / (double) max; 254 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 255 } 256} 257 258 259 260/* 261 * Return the true number of bits per pixel for XImages. 262 * For example, if we request a 24-bit deep visual we may actually need/get 263 * 32bpp XImages. This function returns the appropriate bpp. 264 * Input: dpy - the X display 265 * visinfo - desribes the visual to be used for XImages 266 * Return: true number of bits per pixel for XImages 267 */ 268#ifdef XFree86Server 269 270static int bits_per_pixel( XMesaVisual xmv ) 271{ 272 XMesaVisualInfo visinfo = xmv->visinfo; 273 const int depth = visinfo->nplanes; 274 int i; 275 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 276 if (screenInfo.formats[i].depth == depth) 277 return screenInfo.formats[i].bitsPerPixel; 278 } 279 return depth; /* should never get here, but this should be safe */ 280} 281 282#else 283 284static int bits_per_pixel( XMesaVisual xmv ) 285{ 286 XMesaDisplay *dpy = xmv->display; 287 XMesaVisualInfo visinfo = xmv->visinfo; 288 XMesaImage *img; 289 int bitsPerPixel; 290 /* Create a temporary XImage */ 291 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 292 ZPixmap, 0, /*format, offset*/ 293 (char*) MALLOC(8), /*data*/ 294 1, 1, /*width, height*/ 295 32, /*bitmap_pad*/ 296 0 /*bytes_per_line*/ 297 ); 298 assert(img); 299 /* grab the bits/pixel value */ 300 bitsPerPixel = img->bits_per_pixel; 301 /* free the XImage */ 302 FREE( img->data ); 303 img->data = NULL; 304 XMesaDestroyImage( img ); 305 return bitsPerPixel; 306} 307#endif 308 309 310 311/* 312 * Determine if a given X window ID is valid (window exists). 313 * Do this by calling XGetWindowAttributes() for the window and 314 * checking if we catch an X error. 315 * Input: dpy - the display 316 * win - the window to check for existance 317 * Return: GL_TRUE - window exists 318 * GL_FALSE - window doesn't exist 319 */ 320#ifndef XFree86Server 321static GLboolean WindowExistsFlag; 322 323static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 324{ 325 (void) dpy; 326 if (xerr->error_code == BadWindow) { 327 WindowExistsFlag = GL_FALSE; 328 } 329 return 0; 330} 331 332static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 333{ 334 XWindowAttributes wa; 335 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 336 WindowExistsFlag = GL_TRUE; 337 old_handler = XSetErrorHandler(window_exists_err_handler); 338 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 339 XSetErrorHandler(old_handler); 340 return WindowExistsFlag; 341} 342#endif 343 344 345 346/**********************************************************************/ 347/***** Linked list of XMesaBuffers *****/ 348/**********************************************************************/ 349 350static XMesaBuffer XMesaBufferList = NULL; 351 352 353/* Allocate a new XMesaBuffer, add to linked list */ 354static XMesaBuffer alloc_xmesa_buffer(void) 355{ 356 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 357 if (b) { 358 b->Next = XMesaBufferList; 359 XMesaBufferList = b; 360 } 361 return b; 362} 363 364 365/* 366 * Find an XMesaBuffer by matching X display and colormap but NOT matching 367 * the notThis buffer. 368 */ 369static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 370 XMesaColormap cmap, 371 XMesaBuffer notThis) 372{ 373 XMesaBuffer b; 374 for (b=XMesaBufferList; b; b=b->Next) { 375 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 376 return b; 377 } 378 } 379 return NULL; 380} 381 382 383/* 384 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 385 * entries. 386 */ 387static void free_xmesa_buffer(int client, XMesaBuffer buffer) 388{ 389 XMesaBuffer prev = NULL, b; 390 (void) client; 391 for (b=XMesaBufferList; b; b=b->Next) { 392 if (b==buffer) { 393 /* unlink bufer from list */ 394 if (prev) 395 prev->Next = buffer->Next; 396 else 397 XMesaBufferList = buffer->Next; 398 /* Check to free X colors */ 399 if (buffer->num_alloced>0) { 400 /* If no other buffer uses this X colormap then free the colors. */ 401 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 402#ifdef XFree86Server 403 (void)FreeColors(buffer->cmap, client, 404 buffer->num_alloced, buffer->alloced_colors, 405 0); 406#else 407 XFreeColors(buffer->display, buffer->cmap, 408 buffer->alloced_colors, buffer->num_alloced, 0); 409#endif 410 } 411 } 412 413 _mesa_free_framebuffer_data(&buffer->mesa_buffer); 414 FREE(buffer); 415 416 return; 417 } 418 /* continue search */ 419 prev = b; 420 } 421 /* buffer not found in XMesaBufferList */ 422 _mesa_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 423} 424 425 426/* Copy X color table stuff from one XMesaBuffer to another. */ 427static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 428{ 429 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 430 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 431 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 432 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 433 dst->num_alloced = src->num_alloced; 434 MEMCPY(dst->alloced_colors, src->alloced_colors, 435 sizeof(src->alloced_colors)); 436} 437 438 439 440/**********************************************************************/ 441/***** Misc Private Functions *****/ 442/**********************************************************************/ 443 444 445/* 446 * Return number of bits set in n. 447 */ 448static int bitcount( unsigned long n ) 449{ 450 int bits; 451 for (bits=0; n>0; n=n>>1) { 452 if (n&1) { 453 bits++; 454 } 455 } 456 return bits; 457} 458 459 460 461/* 462 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 463 * Return: GL_TRUE if success, GL_FALSE if error 464 */ 465#ifndef XFree86Server 466static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 467{ 468#ifdef USE_XSHM 469 /* 470 * We have to do a _lot_ of error checking here to be sure we can 471 * really use the XSHM extension. It seems different servers trigger 472 * errors at different points if the extension won't work. Therefore 473 * we have to be very careful... 474 */ 475 GC gc; 476 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 477 478 b->backimage = XShmCreateImage( b->xm_visual->display, 479 b->xm_visual->visinfo->visual, 480 b->xm_visual->visinfo->depth, 481 ZPixmap, NULL, &b->shminfo, 482 b->width, b->height ); 483 if (b->backimage == NULL) { 484 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 485 b->shm = 0; 486 return GL_FALSE; 487 } 488 489 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 490 * b->backimage->height, IPC_CREAT|0777 ); 491 if (b->shminfo.shmid < 0) { 492 _mesa_warning(NULL, "shmget failed while allocating back buffer"); 493 XDestroyImage( b->backimage ); 494 b->backimage = NULL; 495 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmget), disabling."); 496 b->shm = 0; 497 return GL_FALSE; 498 } 499 500 b->shminfo.shmaddr = b->backimage->data 501 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 502 if (b->shminfo.shmaddr == (char *) -1) { 503 _mesa_warning(NULL, "shmat() failed while allocating back buffer"); 504 XDestroyImage( b->backimage ); 505 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 506 b->backimage = NULL; 507 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmat), disabling."); 508 b->shm = 0; 509 return GL_FALSE; 510 } 511 512 b->shminfo.readOnly = False; 513 mesaXErrorFlag = 0; 514 old_handler = XSetErrorHandler( mesaHandleXError ); 515 /* This may trigger the X protocol error we're ready to catch: */ 516 XShmAttach( b->xm_visual->display, &b->shminfo ); 517 XSync( b->xm_visual->display, False ); 518 519 if (mesaXErrorFlag) { 520 /* we are on a remote display, this error is normal, don't print it */ 521 XFlush( b->xm_visual->display ); 522 mesaXErrorFlag = 0; 523 XDestroyImage( b->backimage ); 524 shmdt( b->shminfo.shmaddr ); 525 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 526 b->backimage = NULL; 527 b->shm = 0; 528 (void) XSetErrorHandler( old_handler ); 529 return GL_FALSE; 530 } 531 532 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 533 534 /* Finally, try an XShmPutImage to be really sure the extension works */ 535 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 536 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 537 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 538 XSync( b->xm_visual->display, False ); 539 XFreeGC( b->xm_visual->display, gc ); 540 (void) XSetErrorHandler( old_handler ); 541 if (mesaXErrorFlag) { 542 XFlush( b->xm_visual->display ); 543 mesaXErrorFlag = 0; 544 XDestroyImage( b->backimage ); 545 shmdt( b->shminfo.shmaddr ); 546 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 547 b->backimage = NULL; 548 b->shm = 0; 549 return GL_FALSE; 550 } 551 552 if (b->backimage) { 553 int height = b->backimage->height; 554 /* Needed by PIXELADDR1 macro */ 555 b->ximage_width1 = b->backimage->bytes_per_line; 556 b->ximage_origin1 = (GLubyte *) b->backimage->data 557 + b->ximage_width1 * (height-1); 558 /* Needed by PIXELADDR2 macro */ 559 b->ximage_width2 = b->backimage->bytes_per_line / 2; 560 b->ximage_origin2 = (GLushort *) b->backimage->data 561 + b->ximage_width2 * (height-1); 562 /* Needed by PIXELADDR3 macro */ 563 b->ximage_width3 = b->backimage->bytes_per_line; 564 b->ximage_origin3 = (GLubyte *) b->backimage->data 565 + b->ximage_width3 * (height-1); 566 /* Needed by PIXELADDR4 macro */ 567 b->ximage_width4 = b->backimage->width; 568 b->ximage_origin4 = (GLuint *) b->backimage->data 569 + b->ximage_width4 * (height-1); 570 } 571 572 return GL_TRUE; 573#else 574 /* Can't compile XSHM support */ 575 return GL_FALSE; 576#endif 577} 578#endif 579 580 581 582/* 583 * Setup an off-screen pixmap or Ximage to use as the back buffer. 584 * Input: b - the X/Mesa buffer 585 */ 586void xmesa_alloc_back_buffer( XMesaBuffer b ) 587{ 588 if (b->db_state==BACK_XIMAGE) { 589 /* Deallocate the old backimage, if any */ 590 if (b->backimage) { 591#if defined(USE_XSHM) && !defined(XFree86Server) 592 if (b->shm) { 593 XShmDetach( b->xm_visual->display, &b->shminfo ); 594 XDestroyImage( b->backimage ); 595 shmdt( b->shminfo.shmaddr ); 596 } 597 else 598#endif 599 XMesaDestroyImage( b->backimage ); 600 b->backimage = NULL; 601 } 602 603 /* Allocate new back buffer */ 604#ifdef XFree86Server 605 { 606 /* Allocate a regular XImage for the back buffer. */ 607 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 608 b->width, b->height, NULL); 609#else 610 if (b->shm==0 || alloc_shm_back_buffer(b)==GL_FALSE) { 611 /* Allocate a regular XImage for the back buffer. */ 612 b->backimage = XCreateImage( b->xm_visual->display, 613 b->xm_visual->visinfo->visual, 614 GET_VISUAL_DEPTH(b->xm_visual), 615 ZPixmap, 0, /* format, offset */ 616 NULL, b->width, b->height, 617 8, 0 ); /* pad, bytes_per_line */ 618#endif 619 if (!b->backimage) { 620 _mesa_warning(NULL, "alloc_back_buffer: XCreateImage failed."); 621 } 622 b->backimage->data = (char *) MALLOC( b->backimage->height 623 * b->backimage->bytes_per_line ); 624 if (!b->backimage->data) { 625 _mesa_warning(NULL, "alloc_back_buffer: MALLOC failed."); 626 XMesaDestroyImage( b->backimage ); 627 b->backimage = NULL; 628 } 629 } 630 b->backpixmap = None; 631 } 632 else if (b->db_state==BACK_PIXMAP) { 633 XMesaPixmap old_pixmap = b->backpixmap; 634 /* Free the old back pixmap */ 635 if (b->backpixmap) { 636 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 637 } 638 /* Allocate new back pixmap */ 639 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 640 b->width, b->height, 641 GET_VISUAL_DEPTH(b->xm_visual) ); 642 b->backimage = NULL; 643 /* update other references to backpixmap */ 644 if (b->buffer==(XMesaDrawable)old_pixmap) { 645 b->buffer = (XMesaDrawable)b->backpixmap; 646 } 647 } 648} 649 650 651 652/* 653 * A replacement for XAllocColor. This function should never 654 * fail to allocate a color. When XAllocColor fails, we return 655 * the nearest matching color. If we have to allocate many colors 656 * this function isn't too efficient; the XQueryColors() could be 657 * done just once. 658 * Written by Michael Pichler, Brian Paul, Mark Kilgard 659 * Input: dpy - X display 660 * cmap - X colormap 661 * cmapSize - size of colormap 662 * In/Out: color - the XColor struct 663 * Output: exact - 1=exact color match, 0=closest match 664 * alloced - 1=XAlloc worked, 0=XAlloc failed 665 */ 666static void 667noFaultXAllocColor( int client, 668 XMesaDisplay *dpy, 669 XMesaColormap cmap, 670 int cmapSize, 671 XMesaColor *color, 672 int *exact, int *alloced ) 673{ 674#ifdef XFree86Server 675 Pixel *ppixIn; 676 xrgb *ctable; 677#else 678 /* we'll try to cache ctable for better remote display performance */ 679 static Display *prevDisplay = NULL; 680 static XMesaColormap prevCmap = 0; 681 static int prevCmapSize = 0; 682 static XMesaColor *ctable = NULL; 683#endif 684 XMesaColor subColor; 685 int i, bestmatch; 686 double mindist; /* 3*2^16^2 exceeds long int precision. */ 687 688 (void) client; 689 690 /* First try just using XAllocColor. */ 691#ifdef XFree86Server 692 if (AllocColor(cmap, 693 &color->red, &color->green, &color->blue, 694 &color->pixel, 695 client) == Success) { 696#else 697 if (XAllocColor(dpy, cmap, color)) { 698#endif 699 *exact = 1; 700 *alloced = 1; 701 return; 702 } 703 704 /* Alloc failed, search for closest match */ 705 706 /* Retrieve color table entries. */ 707 /* XXX alloca candidate. */ 708#ifdef XFree86Server 709 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 710 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 711 for (i = 0; i < cmapSize; i++) { 712 ppixIn[i] = i; 713 } 714 QueryColors(cmap, cmapSize, ppixIn, ctable); 715#else 716 if (prevDisplay != dpy || prevCmap != cmap 717 || prevCmapSize != cmapSize || !ctable) { 718 /* free previously cached color table */ 719 if (ctable) 720 FREE(ctable); 721 /* Get the color table from X */ 722 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 723 assert(ctable); 724 for (i = 0; i < cmapSize; i++) { 725 ctable[i].pixel = i; 726 } 727 XQueryColors(dpy, cmap, ctable, cmapSize); 728 prevDisplay = dpy; 729 prevCmap = cmap; 730 prevCmapSize = cmapSize; 731 } 732#endif 733 734 /* Find best match. */ 735 bestmatch = -1; 736 mindist = 0.0; 737 for (i = 0; i < cmapSize; i++) { 738 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 739 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 740 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 741 double dist = dr * dr + dg * dg + db * db; 742 if (bestmatch < 0 || dist < mindist) { 743 bestmatch = i; 744 mindist = dist; 745 } 746 } 747 748 /* Return result. */ 749 subColor.red = ctable[bestmatch].red; 750 subColor.green = ctable[bestmatch].green; 751 subColor.blue = ctable[bestmatch].blue; 752 /* Try to allocate the closest match color. This should only 753 * fail if the cell is read/write. Otherwise, we're incrementing 754 * the cell's reference count. 755 */ 756#ifdef XFree86Server 757 if (AllocColor(cmap, 758 &subColor.red, &subColor.green, &subColor.blue, 759 &subColor.pixel, 760 client) == Success) { 761#else 762 if (XAllocColor(dpy, cmap, &subColor)) { 763#endif 764 *alloced = 1; 765 } 766 else { 767 /* do this to work around a problem reported by Frank Ortega */ 768 subColor.pixel = (unsigned long) bestmatch; 769 subColor.red = ctable[bestmatch].red; 770 subColor.green = ctable[bestmatch].green; 771 subColor.blue = ctable[bestmatch].blue; 772 subColor.flags = DoRed | DoGreen | DoBlue; 773 *alloced = 0; 774 } 775#ifdef XFree86Server 776 FREE(ppixIn); 777 FREE(ctable); 778#else 779 /* don't free table, save it for next time */ 780#endif 781 782 *color = subColor; 783 *exact = 0; 784} 785 786 787 788 789/* 790 * Do setup for PF_GRAYSCALE pixel format. 791 * Note that buffer may be NULL. 792 */ 793static GLboolean setup_grayscale( int client, XMesaVisual v, 794 XMesaBuffer buffer, XMesaColormap cmap ) 795{ 796 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 797 return GL_FALSE; 798 } 799 800 if (buffer) { 801 XMesaBuffer prevBuffer; 802 803 if (!cmap) { 804 return GL_FALSE; 805 } 806 807 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 808 if (prevBuffer && 809 (buffer->xm_visual->mesa_visual.rgbMode == 810 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 811 /* Copy colormap stuff from previous XMesaBuffer which uses same 812 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 813 */ 814 copy_colortable_info(buffer, prevBuffer); 815 } 816 else { 817 /* Allocate 256 shades of gray */ 818 int gray; 819 int colorsfailed = 0; 820 for (gray=0;gray<256;gray++) { 821 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 822 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 823 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 824 int exact, alloced; 825 XMesaColor xcol; 826 xcol.red = (r << 8) | r; 827 xcol.green = (g << 8) | g; 828 xcol.blue = (b << 8) | b; 829 noFaultXAllocColor( client, v->display, 830 cmap, GET_COLORMAP_SIZE(v), 831 &xcol, &exact, &alloced ); 832 if (!exact) { 833 colorsfailed++; 834 } 835 if (alloced) { 836 assert(buffer->num_alloced<256); 837 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 838 buffer->num_alloced++; 839 } 840 841 /*OLD 842 assert(gray < 576); 843 buffer->color_table[gray*3+0] = xcol.pixel; 844 buffer->color_table[gray*3+1] = xcol.pixel; 845 buffer->color_table[gray*3+2] = xcol.pixel; 846 assert(xcol.pixel < 65536); 847 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 848 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 849 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 850 */ 851 buffer->color_table[gray] = xcol.pixel; 852 assert(xcol.pixel < 65536); 853 buffer->pixel_to_r[xcol.pixel] = gray; 854 buffer->pixel_to_g[xcol.pixel] = gray; 855 buffer->pixel_to_b[xcol.pixel] = gray; 856 } 857 858 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 859 _mesa_warning(NULL, 860 "Note: %d out of 256 needed colors do not match exactly.\n", 861 colorsfailed ); 862 } 863 } 864 } 865 866 v->dithered_pf = PF_Grayscale; 867 v->undithered_pf = PF_Grayscale; 868 return GL_TRUE; 869} 870 871 872 873/* 874 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 875 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 876 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 877 * color. While this function was originally designed just for 8-bit 878 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 879 * Dithering code contributed by Bob Mercier. 880 */ 881static GLboolean setup_dithered_color( int client, XMesaVisual v, 882 XMesaBuffer buffer, XMesaColormap cmap ) 883{ 884 (void) DitherValues; /* silence warning */ 885 886 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 887 return GL_FALSE; 888 } 889 890 if (buffer) { 891 XMesaBuffer prevBuffer; 892 893 if (!cmap) { 894 return GL_FALSE; 895 } 896 897 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 898 if (prevBuffer && 899 (buffer->xm_visual->mesa_visual.rgbMode == 900 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 901 /* Copy colormap stuff from previous, matching XMesaBuffer. 902 * Do this to avoid time spent in noFaultXAllocColor. 903 */ 904 copy_colortable_info(buffer, prevBuffer); 905 } 906 else { 907 /* Allocate X colors and initialize color_table[], red_table[], etc */ 908 int r, g, b, i; 909 int colorsfailed = 0; 910 for (r = 0; r < DITH_R; r++) { 911 for (g = 0; g < DITH_G; g++) { 912 for (b = 0; b < DITH_B; b++) { 913 XMesaColor xcol; 914 int exact, alloced; 915 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 916 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 917 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 918 noFaultXAllocColor( client, v->display, 919 cmap, GET_COLORMAP_SIZE(v), 920 &xcol, &exact, &alloced ); 921 if (!exact) { 922 colorsfailed++; 923 } 924 if (alloced) { 925 assert(buffer->num_alloced<256); 926 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 927 buffer->num_alloced++; 928 } 929 i = DITH_MIX( r, g, b ); 930 assert(i < 576); 931 buffer->color_table[i] = xcol.pixel; 932 assert(xcol.pixel < 65536); 933 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 934 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 935 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 936 } 937 } 938 } 939 940 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 941 _mesa_warning(NULL, 942 "Note: %d out of %d needed colors do not match exactly.\n", 943 colorsfailed, DITH_R * DITH_G * DITH_B ); 944 } 945 } 946 } 947 948 v->dithered_pf = PF_Dither; 949 v->undithered_pf = PF_Lookup; 950 return GL_TRUE; 951} 952 953 954/* 955 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 956 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 957 * Special dithering tables have to be initialized. 958 */ 959static void setup_8bit_hpcr( XMesaVisual v ) 960{ 961 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 962 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 963 * on the root window AND the colormap obtainable by XGetRGBColormaps 964 * for that atom must be set on the window. (see also tkInitWindow) 965 * If that colormap is not set, the output will look stripy. 966 */ 967 968 /* Setup color tables with gamma correction */ 969 int i; 970 double g; 971 972 g = 1.0 / v->RedGamma; 973 for (i=0; i<256; i++) { 974 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 975 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 976 } 977 978 g = 1.0 / v->GreenGamma; 979 for (i=0; i<256; i++) { 980 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 981 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 982 } 983 984 g = 1.0 / v->BlueGamma; 985 for (i=0; i<256; i++) { 986 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 987 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 988 } 989 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 990 v->dithered_pf = PF_HPCR; 991 992 /* which method should I use to clear */ 993 /* GL_FALSE: keep the ordinary method */ 994 /* GL_TRUE : clear with dither pattern */ 995 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 996 997 if (v->hpcr_clear_flag) { 998 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 999 DefaultRootWindow(v->display), 1000 16, 2, 8); 1001#ifndef XFree86Server 1002 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1003 0, 0, 16, 2, AllPlanes, ZPixmap); 1004#endif 1005 } 1006} 1007 1008 1009/* 1010 * Setup RGB rendering for a window with a True/DirectColor visual. 1011 */ 1012static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1013 XMesaColormap cmap ) 1014{ 1015 unsigned long rmask, gmask, bmask; 1016 (void) buffer; 1017 (void) cmap; 1018 1019 /* Compute red multiplier (mask) and bit shift */ 1020 v->rshift = 0; 1021 rmask = GET_REDMASK(v); 1022 while ((rmask & 1)==0) { 1023 v->rshift++; 1024 rmask = rmask >> 1; 1025 } 1026 1027 /* Compute green multiplier (mask) and bit shift */ 1028 v->gshift = 0; 1029 gmask = GET_GREENMASK(v); 1030 while ((gmask & 1)==0) { 1031 v->gshift++; 1032 gmask = gmask >> 1; 1033 } 1034 1035 /* Compute blue multiplier (mask) and bit shift */ 1036 v->bshift = 0; 1037 bmask = GET_BLUEMASK(v); 1038 while ((bmask & 1)==0) { 1039 v->bshift++; 1040 bmask = bmask >> 1; 1041 } 1042 1043 /* 1044 * Compute component-to-pixel lookup tables and dithering kernel 1045 */ 1046 { 1047 static GLubyte kernel[16] = { 1048 0*16, 8*16, 2*16, 10*16, 1049 12*16, 4*16, 14*16, 6*16, 1050 3*16, 11*16, 1*16, 9*16, 1051 15*16, 7*16, 13*16, 5*16, 1052 }; 1053 GLint rBits = bitcount(rmask); 1054 GLint gBits = bitcount(gmask); 1055 GLint bBits = bitcount(bmask); 1056 GLint maxBits; 1057 GLuint i; 1058 1059 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1060 for (i=0; i<=rmask; i++) 1061 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1062 for (i=0; i<=gmask; i++) 1063 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1064 for (i=0; i<=bmask; i++) 1065 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1066 1067 /* convert RGB values from [0,255] to pixel components */ 1068 1069 for (i=0;i<256;i++) { 1070 GLint r = gamma_adjust(v->RedGamma, i, 255); 1071 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1072 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1073 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1074 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1075 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1076 } 1077 /* overflow protection */ 1078 for (i=256;i<512;i++) { 1079 v->RtoPixel[i] = v->RtoPixel[255]; 1080 v->GtoPixel[i] = v->GtoPixel[255]; 1081 v->BtoPixel[i] = v->BtoPixel[255]; 1082 } 1083 1084 /* setup dithering kernel */ 1085 maxBits = rBits; 1086 if (gBits > maxBits) maxBits = gBits; 1087 if (bBits > maxBits) maxBits = bBits; 1088 for (i=0;i<16;i++) { 1089 v->Kernel[i] = kernel[i] >> maxBits; 1090 } 1091 1092 v->undithered_pf = PF_Truecolor; 1093 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 1094 } 1095 1096 /* 1097 * Now check for TrueColor visuals which we can optimize. 1098 */ 1099 if ( GET_REDMASK(v) ==0x0000ff 1100 && GET_GREENMASK(v)==0x00ff00 1101 && GET_BLUEMASK(v) ==0xff0000 1102 && CHECK_BYTE_ORDER(v) 1103 && v->BitsPerPixel==32 1104 && sizeof(GLuint)==4 1105 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1106 /* common 32 bpp config used on SGI, Sun */ 1107 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1108 } 1109 else if (GET_REDMASK(v) ==0xff0000 1110 && GET_GREENMASK(v)==0x00ff00 1111 && GET_BLUEMASK(v) ==0x0000ff 1112 && CHECK_BYTE_ORDER(v) 1113 && v->BitsPerPixel==32 1114 && sizeof(GLuint)==4 1115 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1116 /* common 32 bpp config used on Linux, HP, IBM */ 1117 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1118 } 1119 else if (GET_REDMASK(v) ==0xff0000 1120 && GET_GREENMASK(v)==0x00ff00 1121 && GET_BLUEMASK(v) ==0x0000ff 1122 && CHECK_BYTE_ORDER(v) 1123 && v->BitsPerPixel==24 1124 && sizeof(GLuint)==4 1125 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1126 /* common packed 24 bpp config used on Linux */ 1127 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1128 } 1129 else if (GET_REDMASK(v) ==0xf800 1130 && GET_GREENMASK(v)==0x07e0 1131 && GET_BLUEMASK(v) ==0x001f 1132 && CHECK_BYTE_ORDER(v) 1133 && v->BitsPerPixel==16 1134 && sizeof(GLushort)==2 1135 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1136 /* 5-6-5 color weight on common PC VGA boards */ 1137 v->undithered_pf = PF_5R6G5B; 1138 v->dithered_pf = PF_Dither_5R6G5B; 1139 } 1140 else if (GET_REDMASK(v) ==0xe0 1141 && GET_GREENMASK(v)==0x1c 1142 && GET_BLUEMASK(v) ==0x03 1143 && CHECK_FOR_HPCR(v)) { 1144 setup_8bit_hpcr( v ); 1145 } 1146} 1147 1148 1149 1150/* 1151 * Setup RGB rendering for a window with a monochrome visual. 1152 */ 1153static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1154{ 1155 (void) b; 1156 v->dithered_pf = v->undithered_pf = PF_1Bit; 1157 /* if black=1 then we must flip pixel values */ 1158 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1159} 1160 1161 1162 1163/* 1164 * When a context is "made current" for the first time, we can finally 1165 * finish initializing the context's visual and buffer information. 1166 * Input: v - the XMesaVisual to initialize 1167 * b - the XMesaBuffer to initialize (may be NULL) 1168 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1169 * window - the window/pixmap we're rendering into 1170 * cmap - the colormap associated with the window/pixmap 1171 * Return: GL_TRUE=success, GL_FALSE=failure 1172 */ 1173static GLboolean initialize_visual_and_buffer( int client, 1174 XMesaVisual v, 1175 XMesaBuffer b, 1176 GLboolean rgb_flag, 1177 XMesaDrawable window, 1178 XMesaColormap cmap ) 1179{ 1180#ifndef XFree86Server 1181 XGCValues gcvalues; 1182#endif 1183 1184 if (b) { 1185 assert(b->xm_visual == v); 1186 } 1187 1188 /* Save true bits/pixel */ 1189 v->BitsPerPixel = bits_per_pixel(v); 1190 assert(v->BitsPerPixel > 0); 1191 1192 1193 if (rgb_flag==GL_FALSE) { 1194 /* COLOR-INDEXED WINDOW: 1195 * Even if the visual is TrueColor or DirectColor we treat it as 1196 * being color indexed. This is weird but might be useful to someone. 1197 */ 1198 v->dithered_pf = v->undithered_pf = PF_Index; 1199 v->index_bits = GET_VISUAL_DEPTH(v); 1200 } 1201 else { 1202 /* RGB WINDOW: 1203 * We support RGB rendering into almost any kind of visual. 1204 */ 1205 int xclass; 1206 xclass = GET_VISUAL_CLASS(v); 1207 if (xclass==TrueColor || xclass==DirectColor) { 1208 setup_truecolor( v, b, cmap ); 1209 } 1210 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { 1211 setup_monochrome( v, b ); 1212 } 1213 else if (xclass==GrayScale || xclass==StaticGray) { 1214 if (!setup_grayscale( client, v, b, cmap )) { 1215 return GL_FALSE; 1216 } 1217 } 1218 else if ((xclass==PseudoColor || xclass==StaticColor) 1219 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1220 if (!setup_dithered_color( client, v, b, cmap )) { 1221 return GL_FALSE; 1222 } 1223 } 1224 else { 1225 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual."); 1226 return GL_FALSE; 1227 } 1228 v->index_bits = 0; 1229 1230 if (_mesa_getenv("MESA_NO_DITHER")) { 1231 v->dithered_pf = v->undithered_pf; 1232 } 1233 } 1234 1235 1236 /* 1237 * If MESA_INFO env var is set print out some debugging info 1238 * which can help Brian figure out what's going on when a user 1239 * reports bugs. 1240 */ 1241 if (_mesa_getenv("MESA_INFO")) { 1242 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1243 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1244 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1245 _mesa_printf("X/Mesa level = %d\n", v->level); 1246 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1247 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1248 } 1249 1250 if (b && window) { 1251 /* Do window-specific initializations */ 1252 1253 /* Window dimensions */ 1254 unsigned int w, h; 1255 get_drawable_size( v->display, window, &w, &h ); 1256 b->width = w; 1257 b->height = h; 1258 1259 b->frontbuffer = window; 1260 1261 /* Setup for single/double buffering */ 1262 if (v->mesa_visual.doubleBufferMode) { 1263 /* Double buffered */ 1264#ifndef XFree86Server 1265 b->shm = check_for_xshm( v->display ); 1266#endif 1267 xmesa_alloc_back_buffer( b ); 1268 if (b->db_state==BACK_PIXMAP) { 1269 b->buffer = (XMesaDrawable)b->backpixmap; 1270 } 1271 else { 1272 b->buffer = XIMAGE; 1273 } 1274 } 1275 else { 1276 /* Single Buffered */ 1277 b->buffer = b->frontbuffer; 1278 } 1279 1280 /* X11 graphics contexts */ 1281#ifdef XFree86Server 1282 b->gc = CreateScratchGC(v->display, window->depth); 1283#else 1284 b->gc = XCreateGC( v->display, window, 0, NULL ); 1285#endif 1286 XMesaSetFunction( v->display, b->gc, GXcopy ); 1287 1288 /* cleargc - for glClear() */ 1289#ifdef XFree86Server 1290 b->cleargc = CreateScratchGC(v->display, window->depth); 1291#else 1292 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1293#endif 1294 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1295 1296 /* 1297 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1298 * Patch contributed by Michael Pichler May 15, 1995. 1299 */ 1300#ifdef XFree86Server 1301 b->swapgc = CreateScratchGC(v->display, window->depth); 1302 { 1303 CARD32 v[1]; 1304 v[0] = FALSE; 1305 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1306 } 1307#else 1308 gcvalues.graphics_exposures = False; 1309 b->swapgc = XCreateGC( v->display, window, 1310 GCGraphicsExposures, &gcvalues); 1311#endif 1312 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1313 /* 1314 * Set fill style and tile pixmap once for all for HPCR stuff 1315 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1316 * Initialize whole stuff 1317 * Patch contributed by Jacques Leroy March 8, 1998. 1318 */ 1319 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1320 int i; 1321 for (i=0; i<16; i++) 1322 { 1323 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1324 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1325 } 1326 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1327 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1328 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1329 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1330 } 1331 1332 /* Initialize the row buffer XImage for use in write_color_span() */ 1333#ifdef XFree86Server 1334 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1335 (char *)MALLOC(MAX_WIDTH*4)); 1336#else 1337 b->rowimage = XCreateImage( v->display, 1338 v->visinfo->visual, 1339 v->visinfo->depth, 1340 ZPixmap, 0, /*format, offset*/ 1341 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1342 MAX_WIDTH, 1, /*width, height*/ 1343 32, /*bitmap_pad*/ 1344 0 /*bytes_per_line*/ ); 1345#endif 1346 } 1347 1348 return GL_TRUE; 1349} 1350 1351 1352 1353/* 1354 * Convert an RGBA color to a pixel value. 1355 */ 1356unsigned long 1357xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1358 GLuint pixelFormat) 1359{ 1360 switch (pixelFormat) { 1361 case PF_Index: 1362 return 0; 1363 case PF_Truecolor: 1364 { 1365 unsigned long p; 1366 PACK_TRUECOLOR( p, r, g, b ); 1367 return p; 1368 } 1369 case PF_8A8B8G8R: 1370 return PACK_8A8B8G8R( r, g, b, a ); 1371 case PF_8R8G8B: 1372 /* fall through */ 1373 case PF_8R8G8B24: 1374 return PACK_8R8G8B( r, g, b ); 1375 case PF_5R6G5B: 1376 return PACK_5R6G5B( r, g, b ); 1377 case PF_Dither: 1378 { 1379 DITHER_SETUP; 1380 return DITHER( 1, 0, r, g, b ); 1381 } 1382 case PF_1Bit: 1383 /* 382 = (3*255)/2 */ 1384 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1385 case PF_HPCR: 1386 return DITHER_HPCR(1, 1, r, g, b); 1387 case PF_Lookup: 1388 { 1389 LOOKUP_SETUP; 1390 return LOOKUP( r, g, b ); 1391 } 1392 case PF_Grayscale: 1393 return GRAY_RGB( r, g, b ); 1394 case PF_Dither_True: 1395 /* fall through */ 1396 case PF_Dither_5R6G5B: 1397 { 1398 unsigned long p; 1399 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1400 return p; 1401 } 1402 default: 1403 _mesa_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1404 } 1405 return 0; 1406} 1407 1408 1409/**********************************************************************/ 1410/***** Public Functions *****/ 1411/**********************************************************************/ 1412 1413 1414/* 1415 * Create a new X/Mesa visual. 1416 * Input: display - X11 display 1417 * visinfo - an XVisualInfo pointer 1418 * rgb_flag - GL_TRUE = RGB mode, 1419 * GL_FALSE = color index mode 1420 * alpha_flag - alpha buffer requested? 1421 * db_flag - GL_TRUE = double-buffered, 1422 * GL_FALSE = single buffered 1423 * stereo_flag - stereo visual? 1424 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1425 * GL_FALSE = use an off-screen pixmap for back buffer 1426 * depth_size - requested bits/depth values, or zero 1427 * stencil_size - requested bits/stencil values, or zero 1428 * accum_red_size - requested bits/red accum values, or zero 1429 * accum_green_size - requested bits/green accum values, or zero 1430 * accum_blue_size - requested bits/blue accum values, or zero 1431 * accum_alpha_size - requested bits/alpha accum values, or zero 1432 * num_samples - number of samples/pixel if multisampling, or zero 1433 * level - visual level, usually 0 1434 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT 1435 * Return; a new XMesaVisual or 0 if error. 1436 */ 1437XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1438 XMesaVisualInfo visinfo, 1439 GLboolean rgb_flag, 1440 GLboolean alpha_flag, 1441 GLboolean db_flag, 1442 GLboolean stereo_flag, 1443 GLboolean ximage_flag, 1444 GLint depth_size, 1445 GLint stencil_size, 1446 GLint accum_red_size, 1447 GLint accum_green_size, 1448 GLint accum_blue_size, 1449 GLint accum_alpha_size, 1450 GLint num_samples, 1451 GLint level, 1452 GLint visualCaveat ) 1453{ 1454 char *gamma; 1455 XMesaVisual v; 1456 GLint red_bits, green_bits, blue_bits, alpha_bits; 1457 1458 /* For debugging only */ 1459 if (_mesa_getenv("MESA_XSYNC")) { 1460 /* This makes debugging X easier. 1461 * In your debugger, set a breakpoint on _XError to stop when an 1462 * X protocol error is generated. 1463 */ 1464#ifdef XFree86Server 1465 /* NOT_NEEDED */ 1466#else 1467 XSynchronize( display, 1 ); 1468#endif 1469 } 1470 1471 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1472 if (!v) { 1473 return NULL; 1474 } 1475 1476 /* 1477 * In the X server, NULL is passed in for the display. It will have 1478 * to be set before using this visual. See XMesaSetVisualDisplay() 1479 * below. 1480 */ 1481 v->display = display; 1482 1483 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1484 * the struct but we may need some of the information contained in it 1485 * at a later time. 1486 */ 1487#ifdef XFree86Server 1488 v->visinfo = visinfo; 1489#else 1490 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1491 if(!v->visinfo) { 1492 FREE(v); 1493 return NULL; 1494 } 1495 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1496#endif 1497 1498#ifdef XFree86Server 1499 /* Initialize the depth of the screen */ 1500 { 1501 PixmapFormatRec *format; 1502 1503 for (format = screenInfo.formats; 1504 format->depth != display->rootDepth; 1505 format++) 1506 ; 1507 v->screen_depth = format->bitsPerPixel; 1508 } 1509#endif 1510 1511 /* check for MESA_GAMMA environment variable */ 1512 gamma = _mesa_getenv("MESA_GAMMA"); 1513 if (gamma) { 1514 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1515 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1516 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1517 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1518 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1519 } 1520 else { 1521 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1522 } 1523 1524 v->ximage_flag = ximage_flag; 1525 v->level = level; 1526 v->VisualCaveat = visualCaveat; 1527 1528 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1529 1530 { 1531 int xclass; 1532 xclass = GET_VISUAL_CLASS(v); 1533 if (xclass==TrueColor || xclass==DirectColor) { 1534 red_bits = bitcount(GET_REDMASK(v)); 1535 green_bits = bitcount(GET_GREENMASK(v)); 1536 blue_bits = bitcount(GET_BLUEMASK(v)); 1537 alpha_bits = 0; 1538 } 1539 else { 1540 /* this is an approximation */ 1541 int depth; 1542 depth = GET_VISUAL_DEPTH(v); 1543 red_bits = depth / 3; 1544 depth -= red_bits; 1545 green_bits = depth / 2; 1546 depth -= green_bits; 1547 blue_bits = depth; 1548 alpha_bits = 0; 1549 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1550 } 1551 } 1552 1553 if (alpha_flag && alpha_bits == 0) 1554 alpha_bits = 8; 1555 1556 _mesa_initialize_visual( &v->mesa_visual, 1557 rgb_flag, db_flag, stereo_flag, 1558 red_bits, green_bits, 1559 blue_bits, alpha_bits, 1560 v->index_bits, 1561 depth_size, 1562 stencil_size, 1563 accum_red_size, accum_green_size, 1564 accum_blue_size, accum_alpha_size, 1565 0 ); 1566 return v; 1567} 1568 1569 1570void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1571{ 1572 v->display = dpy; 1573} 1574 1575 1576void XMesaDestroyVisual( XMesaVisual v ) 1577{ 1578#ifndef XFree86Server 1579 FREE(v->visinfo); 1580#endif 1581 FREE(v); 1582} 1583 1584 1585 1586/* 1587 * Create a new XMesaContext. 1588 * Input: v - XMesaVisual 1589 * share_list - another XMesaContext with which to share display 1590 * lists or NULL if no sharing is wanted. 1591 * Return: an XMesaContext or NULL if error. 1592 */ 1593XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1594{ 1595 static GLboolean firstTime = GL_TRUE; 1596 XMesaContext c; 1597 GLboolean direct = GL_TRUE; /* not really */ 1598 GLcontext *mesaCtx; 1599 1600 if (firstTime) { 1601 _glthread_INIT_MUTEX(_xmesa_lock); 1602 firstTime = GL_FALSE; 1603 } 1604 1605 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1606 if (!c) { 1607 return NULL; 1608 } 1609 1610 mesaCtx = &(c->mesa); 1611 1612 /* Setup these pointers here since they're using for making the default 1613 * and proxy texture objects. Actually, we don't really need to do 1614 * this since we're using the default fallback functions which 1615 * _mesa_initialize_context() would plug in if needed. 1616 */ 1617 mesaCtx->Driver.NewTextureObject = _mesa_new_texture_object; 1618 mesaCtx->Driver.DeleteTexture = _mesa_delete_texture_object; 1619 1620 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1621 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1622 (void *) c, direct)) { 1623 FREE(c); 1624 return NULL; 1625 } 1626 1627 _mesa_enable_sw_extensions(mesaCtx); 1628 _mesa_enable_1_3_extensions(mesaCtx); 1629 _mesa_enable_1_4_extensions(mesaCtx); 1630 _mesa_enable_1_5_extensions(mesaCtx); 1631 1632 if (CHECK_BYTE_ORDER(v)) { 1633 c->swapbytes = GL_FALSE; 1634 } 1635 else { 1636 c->swapbytes = GL_TRUE; 1637 } 1638 1639 c->xm_visual = v; 1640 c->xm_draw_buffer = NULL; /* set later by XMesaMakeCurrent */ 1641 c->xm_read_buffer = NULL; /* set later by XMesaMakeCurrent */ 1642 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1643 c->display = v->display; 1644 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1645 1646 mesaCtx->Driver.UpdateState = xmesa_update_state; 1647 1648 /* Initialize the software rasterizer and helper modules. 1649 */ 1650 _swrast_CreateContext( mesaCtx ); 1651 _ac_CreateContext( mesaCtx ); 1652 _tnl_CreateContext( mesaCtx ); 1653 _swsetup_CreateContext( mesaCtx ); 1654 1655 xmesa_register_swrast_functions( mesaCtx ); 1656 1657 /* Set up some constant pointers: 1658 */ 1659 xmesa_init_pointers( mesaCtx ); 1660 1661 return c; 1662} 1663 1664 1665 1666 1667void XMesaDestroyContext( XMesaContext c ) 1668{ 1669 GLcontext *mesaCtx = &c->mesa; 1670#ifdef FX 1671 if (c->xm_draw_buffer && c->xm_buffer->FXctx) 1672 fxMesaDestroyContext(c->xm_draw_buffer->FXctx); 1673#endif 1674 _swsetup_DestroyContext( mesaCtx ); 1675 _swrast_DestroyContext( mesaCtx ); 1676 _tnl_DestroyContext( mesaCtx ); 1677 _ac_DestroyContext( mesaCtx ); 1678 _mesa_free_context_data( mesaCtx ); 1679 _mesa_free( c ); 1680} 1681 1682 1683 1684/* 1685 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1686 * Create a new XMesaBuffer from an X window. 1687 * Input: v - the XMesaVisual 1688 * w - the window 1689 * c - the context 1690 * Return: new XMesaBuffer or NULL if error 1691 */ 1692XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1693 XMesaContext c ) 1694{ 1695#ifndef XFree86Server 1696 XWindowAttributes attr; 1697#endif 1698#ifdef FX 1699 char *fxEnvVar; 1700#endif 1701 int client = 0; 1702 1703 XMesaBuffer b = alloc_xmesa_buffer(); 1704 if (!b) { 1705 return NULL; 1706 } 1707 1708 (void) c; 1709 1710#ifdef XFree86Server 1711 client = CLIENT_ID(((XMesaDrawable)w)->id); 1712#endif 1713 1714 assert(v); 1715 1716#ifdef XFree86Server 1717 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1718#else 1719 XGetWindowAttributes( v->display, w, &attr ); 1720 1721 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1722#endif 1723 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1724 return NULL; 1725 } 1726 1727 b->xm_visual = v; 1728 b->type = WINDOW; 1729 b->display = v->display; 1730#ifdef XFree86Server 1731 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1732#else 1733 if (attr.colormap) { 1734 b->cmap = attr.colormap; 1735 } 1736 else { 1737 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1738 /* this is weird, a window w/out a colormap!? */ 1739 /* OK, let's just allocate a new one and hope for the best */ 1740 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1741 } 1742#endif 1743 1744 /* determine back buffer implementation */ 1745 if (v->mesa_visual.doubleBufferMode) { 1746 if (v->ximage_flag) { 1747 b->db_state = BACK_XIMAGE; 1748 } 1749 else { 1750 b->db_state = BACK_PIXMAP; 1751 } 1752 } 1753 else { 1754 b->db_state = 0; 1755 } 1756 1757 _mesa_initialize_framebuffer(&b->mesa_buffer, 1758 &v->mesa_visual, 1759 v->mesa_visual.depthBits > 0, 1760 v->mesa_visual.stencilBits > 0, 1761 v->mesa_visual.accumRedBits > 0, 1762 v->mesa_visual.alphaBits > 0 ); 1763 1764 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1765 (XMesaDrawable)w, b->cmap )) { 1766 free_xmesa_buffer(client, b); 1767 return NULL; 1768 } 1769 1770#ifdef FX 1771 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1772 if (fxEnvVar) { 1773 if (fxEnvVar[0]!='d') { 1774 int attribs[100]; 1775 int numAttribs = 0; 1776 int hw; 1777 if (v->mesa_visual.depthBits > 0) { 1778 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1779 attribs[numAttribs++] = v->mesa_visual.depthBits; 1780 } 1781 if (v->mesa_visual.doubleBufferMode) { 1782 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1783 } 1784 if (v->mesa_visual.accumRedBits > 0) { 1785 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1786 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1787 } 1788 if (v->mesa_visual.stencilBits > 0) { 1789 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1790 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1791 } 1792 if (v->mesa_visual.alphaBits > 0) { 1793 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1794 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1795 } 1796 if (1) { 1797 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1798 attribs[numAttribs++] = (int) &(c->mesa); 1799 } 1800 attribs[numAttribs++] = FXMESA_NONE; 1801 1802 /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ 1803 if ((hw = fxMesaSelectCurrentBoard(0))==GR_SSTTYPE_VOODOO) { 1804 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1805 if ((v->undithered_pf!=PF_Index) && (b->backimage)) { 1806 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1807 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1808 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1809 else 1810 b->FXwindowHack = GL_FALSE; 1811 } 1812 } 1813 else { 1814 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1815 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1816 GR_REFRESH_75Hz, attribs); 1817 else 1818 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1819 b->FXisHackUsable = GL_FALSE; 1820 b->FXwindowHack = GL_FALSE; 1821 } 1822 /* 1823 fprintf(stderr, 1824 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1825 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1826 */ 1827 } 1828 } 1829 else { 1830 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1831 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1832 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1833 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1834 } 1835#endif 1836 1837 return b; 1838} 1839 1840 1841XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1842{ 1843 return XMesaCreateWindowBuffer2( v, w, NULL ); 1844} 1845 1846 1847/* 1848 * Create a new XMesaBuffer from an X pixmap. 1849 * Input: v - the XMesaVisual 1850 * p - the pixmap 1851 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor 1852 * visual for the pixmap 1853 * Return: new XMesaBuffer or NULL if error 1854 */ 1855XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1856 XMesaPixmap p, XMesaColormap cmap ) 1857{ 1858 int client = 0; 1859 XMesaBuffer b = alloc_xmesa_buffer(); 1860 if (!b) { 1861 return NULL; 1862 } 1863 1864 1865#ifdef XFree86Server 1866 client = CLIENT_ID(((XMesaDrawable)p)->id); 1867#endif 1868 1869 assert(v); 1870 1871 b->xm_visual = v; 1872 b->type = PIXMAP; 1873 b->display = v->display; 1874 b->cmap = cmap; 1875 1876 /* determine back buffer implementation */ 1877 if (v->mesa_visual.doubleBufferMode) { 1878 if (v->ximage_flag) { 1879 b->db_state = BACK_XIMAGE; 1880 } 1881 else { 1882 b->db_state = BACK_PIXMAP; 1883 } 1884 } 1885 else { 1886 b->db_state = 0; 1887 } 1888 1889 _mesa_initialize_framebuffer(&b->mesa_buffer, 1890 &v->mesa_visual, 1891 v->mesa_visual.depthBits > 0, 1892 v->mesa_visual.stencilBits > 0, 1893 v->mesa_visual.accumRedBits + 1894 v->mesa_visual.accumGreenBits + 1895 v->mesa_visual.accumBlueBits > 0, 1896 v->mesa_visual.alphaBits > 0 ); 1897 1898 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1899 (XMesaDrawable)p, cmap)) { 1900 free_xmesa_buffer(client, b); 1901 return NULL; 1902 } 1903 1904 return b; 1905} 1906 1907 1908 1909XMesaBuffer XMesaCreatePBuffer( XMesaVisual v, XMesaColormap cmap, 1910 unsigned int width, unsigned int height ) 1911{ 1912#ifdef XFree86Server 1913 return 0; 1914#else 1915 int client = 0; 1916 XMesaWindow root; 1917 XMesaDrawable drawable; /* X Pixmap Drawable */ 1918 XMesaBuffer b = alloc_xmesa_buffer(); 1919 if (!b) { 1920 return NULL; 1921 } 1922 1923 b->xm_visual = v; 1924 b->type = PBUFFER; 1925 b->display = v->display; 1926 b->cmap = cmap; 1927 1928 /* allocate pixmap for front buffer */ 1929 root = RootWindow( v->display, v->visinfo->screen ); 1930 drawable = XCreatePixmap( v->display, root, width, height, v->visinfo->depth ); 1931 1932 /* determine back buffer implementation */ 1933 if (v->mesa_visual.doubleBufferMode) { 1934 if (v->ximage_flag) { 1935 b->db_state = BACK_XIMAGE; 1936 } 1937 else { 1938 b->db_state = BACK_PIXMAP; 1939 } 1940 } 1941 else { 1942 b->db_state = 0; 1943 } 1944 1945 _mesa_initialize_framebuffer(&b->mesa_buffer, 1946 &v->mesa_visual, 1947 v->mesa_visual.depthBits > 0, 1948 v->mesa_visual.stencilBits > 0, 1949 v->mesa_visual.accumRedBits + 1950 v->mesa_visual.accumGreenBits + 1951 v->mesa_visual.accumBlueBits > 0, 1952 v->mesa_visual.alphaBits > 0 ); 1953 1954 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1955 drawable, cmap)) { 1956 free_xmesa_buffer(client, b); 1957 return NULL; 1958 } 1959 1960 return b; 1961#endif 1962} 1963 1964 1965 1966/* 1967 * Deallocate an XMesaBuffer structure and all related info. 1968 */ 1969void XMesaDestroyBuffer( XMesaBuffer b ) 1970{ 1971 int client = 0; 1972 1973#ifdef XFree86Server 1974 if (b->frontbuffer) 1975 client = CLIENT_ID(b->frontbuffer->id); 1976#endif 1977 1978 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1979 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1980 if (b->swapgc) XMesaFreeGC( b->xm_visual->display, b->swapgc ); 1981 1982 if (b->backimage) { 1983#if defined(USE_XSHM) && !defined(XFree86Server) 1984 if (b->shm) { 1985 XShmDetach( b->xm_visual->display, &b->shminfo ); 1986 XDestroyImage( b->backimage ); 1987 shmdt( b->shminfo.shmaddr ); 1988 } 1989 else 1990#endif 1991 XMesaDestroyImage( b->backimage ); 1992 } 1993 if (b->backpixmap) { 1994 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 1995 if (b->xm_visual->hpcr_clear_flag) { 1996 XMesaFreePixmap( b->xm_visual->display, 1997 b->xm_visual->hpcr_clear_pixmap ); 1998 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 1999 } 2000 } 2001 if (b->rowimage) { 2002 FREE( b->rowimage->data ); 2003 b->rowimage->data = NULL; 2004 XMesaDestroyImage( b->rowimage ); 2005 } 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 c->xm_draw_buffer = drawBuffer; 2036 c->xm_read_buffer = readBuffer; 2037 c->xm_buffer = drawBuffer; 2038 2039 return GL_TRUE; 2040 } 2041#endif 2042 if (&(c->mesa) == _mesa_get_current_context() 2043 && c->xm_draw_buffer == drawBuffer 2044 && c->xm_read_buffer == readBuffer 2045 && c->xm_draw_buffer->wasCurrent) { 2046 /* same context and buffer, do nothing */ 2047 return GL_TRUE; 2048 } 2049 2050 c->xm_draw_buffer = drawBuffer; 2051 c->xm_read_buffer = readBuffer; 2052 c->xm_buffer = drawBuffer; 2053 2054 _mesa_make_current2(&(c->mesa), 2055 &drawBuffer->mesa_buffer, 2056 &readBuffer->mesa_buffer); 2057 2058 if (c->mesa.Viewport.Width == 0) { 2059 /* initialize viewport to window size */ 2060 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2061 c->mesa.Scissor.Width = drawBuffer->width; 2062 c->mesa.Scissor.Height = drawBuffer->height; 2063 } 2064 2065 if (c->xm_visual->mesa_visual.rgbMode) { 2066 /* 2067 * Must recompute and set these pixel values because colormap 2068 * can be different for different windows. 2069 */ 2070 c->clearpixel = xmesa_color_to_pixel( c, 2071 c->clearcolor[0], 2072 c->clearcolor[1], 2073 c->clearcolor[2], 2074 c->clearcolor[3], 2075 c->xm_visual->undithered_pf); 2076 XMesaSetForeground(c->display, c->xm_draw_buffer->cleargc, c->clearpixel); 2077 } 2078 2079 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2080 c->xm_draw_buffer->wasCurrent = GL_TRUE; 2081 } 2082 else { 2083 /* Detach */ 2084 _mesa_make_current2( NULL, NULL, NULL ); 2085 } 2086 return GL_TRUE; 2087} 2088 2089 2090/* 2091 * Unbind the context c from its buffer. 2092 */ 2093GLboolean XMesaUnbindContext( XMesaContext c ) 2094{ 2095 /* A no-op for XFree86 integration purposes */ 2096 return GL_TRUE; 2097} 2098 2099 2100XMesaContext XMesaGetCurrentContext( void ) 2101{ 2102 GET_CURRENT_CONTEXT(ctx); 2103 if (ctx) { 2104 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2105 return xmesa; 2106 } 2107 else { 2108 return 0; 2109 } 2110} 2111 2112 2113XMesaBuffer XMesaGetCurrentBuffer( void ) 2114{ 2115 GET_CURRENT_CONTEXT(ctx); 2116 if (ctx) { 2117 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2118 return xmesa->xm_draw_buffer; 2119 } 2120 else { 2121 return 0; 2122 } 2123} 2124 2125 2126/* New in Mesa 3.1 */ 2127XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2128{ 2129 GET_CURRENT_CONTEXT(ctx); 2130 if (ctx) { 2131 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2132 return xmesa->xm_read_buffer; 2133 } 2134 else { 2135 return 0; 2136 } 2137} 2138 2139 2140GLboolean XMesaForceCurrent(XMesaContext c) 2141{ 2142 if (c) { 2143 if (&(c->mesa) != _mesa_get_current_context()) { 2144 _mesa_make_current(&(c->mesa), &c->xm_draw_buffer->mesa_buffer); 2145 } 2146 } 2147 else { 2148 _mesa_make_current(NULL, NULL); 2149 } 2150 return GL_TRUE; 2151} 2152 2153 2154GLboolean XMesaLoseCurrent(XMesaContext c) 2155{ 2156 (void) c; 2157 _mesa_make_current(NULL, NULL); 2158 return GL_TRUE; 2159} 2160 2161 2162/* 2163 * Switch 3Dfx support hack between window and full-screen mode. 2164 */ 2165GLboolean XMesaSetFXmode( GLint mode ) 2166{ 2167#ifdef FX 2168 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2169 if (fx && fx[0] != 'd') { 2170 GET_CURRENT_CONTEXT(ctx); 2171 GrHwConfiguration hw; 2172 if (!FX_grSstQueryHardware(&hw)) { 2173 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2174 return GL_FALSE; 2175 } 2176 if (hw.num_sst < 1) { 2177 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2178 return GL_FALSE; 2179 } 2180 if (ctx) { 2181 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2182 if (mode == XMESA_FX_WINDOW) { 2183 if (xmesa->xm_draw_buffer->FXisHackUsable) { 2184 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2185 xmesa->xm_draw_buffer->FXwindowHack = GL_TRUE; 2186 return GL_TRUE; 2187 } 2188 } 2189 else if (mode == XMESA_FX_FULLSCREEN) { 2190 FX_grSstControl(GR_CONTROL_ACTIVATE); 2191 xmesa->xm_draw_buffer->FXwindowHack = GL_FALSE; 2192 return GL_TRUE; 2193 } 2194 else { 2195 /* Error: Bad mode value */ 2196 } 2197 } 2198 } 2199 /*fprintf(stderr, "fallthrough\n");*/ 2200#else 2201 (void) mode; 2202#endif 2203 return GL_FALSE; 2204} 2205 2206 2207 2208#ifdef FX 2209/* 2210 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2211 */ 2212static void FXgetImage( XMesaBuffer b ) 2213{ 2214 GET_CURRENT_CONTEXT(ctx); 2215 static unsigned short pixbuf[MAX_WIDTH]; 2216 GLuint x, y; 2217 int xpos, ypos; 2218 XMesaWindow root; 2219 unsigned int bw, depth, width, height; 2220 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2221 2222#ifdef XFree86Server 2223 x = b->frontbuffer->x; 2224 y = b->frontbuffer->y; 2225 width = b->frontbuffer->width; 2226 height = b->frontbuffer->height; 2227 depth = b->frontbuffer->depth; 2228#else 2229 XGetGeometry( b->xm_visual->display, b->frontbuffer, 2230 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2231#endif 2232 if (b->width != width || b->height != height) { 2233 b->width = MIN2((int)width, b->FXctx->width); 2234 b->height = MIN2((int)height, b->FXctx->height); 2235 if (b->width & 1) 2236 b->width--; /* prevent odd width */ 2237 xmesa_alloc_back_buffer( b ); 2238 } 2239 2240 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2241 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2242 /* Special case: 16bpp RGB */ 2243 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2244 0, b->FXctx->height - b->height, /*pos*/ 2245 b->width, b->height, /* size */ 2246 b->width * sizeof(GLushort), /* stride */ 2247 b->backimage->data); /* dest buffer */ 2248 } 2249 else if (b->xm_visual->dithered_pf==PF_Dither 2250 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2251 /* Special case: 8bpp RGB */ 2252 for (y=0;y<b->height;y++) { 2253 GLubyte *ptr = (GLubyte*) b->backimage->data 2254 + b->backimage->bytes_per_line * y; 2255 XDITHER_SETUP(y); 2256 2257 /* read row from 3Dfx frame buffer */ 2258 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2259 0, b->FXctx->height-(b->height-y), 2260 b->width, 1, 2261 0, 2262 pixbuf ); 2263 2264 /* write to XImage back buffer */ 2265 for (x=0;x<b->width;x++) { 2266 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2267 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2268 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2269 *ptr++ = XDITHER( x, r, g, b); 2270 } 2271 } 2272 } 2273 else { 2274 /* General case: slow! */ 2275 for (y=0;y<b->height;y++) { 2276 /* read row from 3Dfx frame buffer */ 2277 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2278 0, b->FXctx->height-(b->height-y), 2279 b->width, 1, 2280 0, 2281 pixbuf ); 2282 2283 /* write to XImage back buffer */ 2284 for (x=0;x<b->width;x++) { 2285 XMesaPutPixel(b->backimage,x,y, 2286 xmesa_color_to_pixel(xmesa, 2287 (pixbuf[x] & 0xf800) >> 8, 2288 (pixbuf[x] & 0x07e0) >> 3, 2289 (pixbuf[x] & 0x001f) << 3, 2290 0xff, 2291 b->xm_visual->undithered_pf)); 2292 } 2293 } 2294 } 2295 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2296} 2297#endif 2298 2299 2300/* 2301 * Copy the back buffer to the front buffer. If there's no back buffer 2302 * this is a no-op. 2303 */ 2304void XMesaSwapBuffers( XMesaBuffer b ) 2305{ 2306 GET_CURRENT_CONTEXT(ctx); 2307 2308 /* If we're swapping the buffer associated with the current context 2309 * we have to flush any pending rendering commands first. 2310 */ 2311 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2312 _mesa_notifySwapBuffers(ctx); 2313 2314 if (b->db_state) { 2315#ifdef FX 2316 if (b->FXctx) { 2317 fxMesaSwapBuffers(); 2318 2319 if (b->FXwindowHack) 2320 FXgetImage(b); 2321 else 2322 return; 2323 } 2324#endif 2325 if (b->backimage) { 2326 /* Copy Ximage from host's memory to server's window */ 2327#if defined(USE_XSHM) && !defined(XFree86Server) 2328 if (b->shm) { 2329 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2330 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2331 b->swapgc, 2332 b->backimage, 0, 0, 2333 0, 0, b->width, b->height, False ); 2334 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2335 } 2336 else 2337#endif 2338 { 2339 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2340 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2341 b->swapgc, 2342 b->backimage, 0, 0, 2343 0, 0, b->width, b->height ); 2344 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2345 } 2346 } 2347 else { 2348 /* Copy pixmap to window on server */ 2349 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2350 XMesaCopyArea( b->xm_visual->display, 2351 b->backpixmap, /* source drawable */ 2352 b->frontbuffer, /* dest. drawable */ 2353 b->swapgc, 2354 0, 0, b->width, b->height, /* source region */ 2355 0, 0 /* dest region */ 2356 ); 2357 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2358 } 2359 } 2360#if !defined(XFree86Server) 2361 XSync( b->xm_visual->display, False ); 2362#endif 2363} 2364 2365 2366 2367/* 2368 * Copy sub-region of back buffer to front buffer 2369 */ 2370void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2371{ 2372 GET_CURRENT_CONTEXT(ctx); 2373 2374 /* If we're swapping the buffer associated with the current context 2375 * we have to flush any pending rendering commands first. 2376 */ 2377 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2378 _mesa_notifySwapBuffers(ctx); 2379 2380 if (b->db_state) { 2381 int yTop = b->height - y - height; 2382#ifdef FX 2383 if (b->FXctx) { 2384 fxMesaSwapBuffers(); 2385 if (b->FXwindowHack) 2386 FXgetImage(b); 2387 else 2388 return; 2389 } 2390#endif 2391 if (b->backimage) { 2392 /* Copy Ximage from host's memory to server's window */ 2393#if defined(USE_XSHM) && !defined(XFree86Server) 2394 if (b->shm) { 2395 /* XXX assuming width and height aren't too large! */ 2396 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2397 b->swapgc, 2398 b->backimage, x, yTop, 2399 x, yTop, width, height, False ); 2400 /* wait for finished event??? */ 2401 } 2402 else 2403#endif 2404 { 2405 /* XXX assuming width and height aren't too large! */ 2406 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2407 b->swapgc, 2408 b->backimage, x, yTop, 2409 x, yTop, width, height ); 2410 } 2411 } 2412 else { 2413 /* Copy pixmap to window on server */ 2414 XMesaCopyArea( b->xm_visual->display, 2415 b->backpixmap, /* source drawable */ 2416 b->frontbuffer, /* dest. drawable */ 2417 b->swapgc, 2418 x, yTop, width, height, /* source region */ 2419 x, yTop /* dest region */ 2420 ); 2421 } 2422 } 2423} 2424 2425 2426/* 2427 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2428 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2429 * back buffer directly. 2430 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2431 * ximage - pointer to back buffer's XImage, or NULL 2432 * Return: GL_TRUE = context is double buffered 2433 * GL_FALSE = context is single buffered 2434 */ 2435GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2436 XMesaPixmap *pixmap, 2437 XMesaImage **ximage ) 2438{ 2439 if (b->db_state) { 2440 if (pixmap) *pixmap = b->backpixmap; 2441 if (ximage) *ximage = b->backimage; 2442 return GL_TRUE; 2443 } 2444 else { 2445 *pixmap = 0; 2446 *ximage = NULL; 2447 return GL_FALSE; 2448 } 2449} 2450 2451 2452/* 2453 * Return the depth buffer associated with an XMesaBuffer. 2454 * Input: b - the XMesa buffer handle 2455 * Output: width, height - size of buffer in pixels 2456 * bytesPerValue - bytes per depth value (2 or 4) 2457 * buffer - pointer to depth buffer values 2458 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2459 */ 2460GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2461 GLint *bytesPerValue, void **buffer ) 2462{ 2463 if (!b->mesa_buffer.DepthBuffer) { 2464 *width = 0; 2465 *height = 0; 2466 *bytesPerValue = 0; 2467 *buffer = 0; 2468 return GL_FALSE; 2469 } 2470 else { 2471 *width = b->mesa_buffer.Width; 2472 *height = b->mesa_buffer.Height; 2473 *bytesPerValue = sizeof(GLdepth); 2474 *buffer = b->mesa_buffer.DepthBuffer; 2475 return GL_TRUE; 2476 } 2477} 2478 2479 2480void XMesaFlush( XMesaContext c ) 2481{ 2482 if (c && c->xm_visual) { 2483#ifdef XFree86Server 2484 /* NOT_NEEDED */ 2485#else 2486 XSync( c->xm_visual->display, False ); 2487#endif 2488 } 2489} 2490 2491 2492 2493const char *XMesaGetString( XMesaContext c, int name ) 2494{ 2495 (void) c; 2496 if (name==XMESA_VERSION) { 2497 return "5.0"; 2498 } 2499 else if (name==XMESA_EXTENSIONS) { 2500 return ""; 2501 } 2502 else { 2503 return NULL; 2504 } 2505} 2506 2507 2508 2509XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2510{ 2511 XMesaBuffer b; 2512 for (b=XMesaBufferList; b; b=b->Next) { 2513 if (b->frontbuffer==d && b->display==dpy) { 2514 return b; 2515 } 2516 } 2517 return NULL; 2518} 2519 2520 2521 2522/* 2523 * Look for XMesaBuffers whose X window has been destroyed. 2524 * Deallocate any such XMesaBuffers. 2525 */ 2526void XMesaGarbageCollect( void ) 2527{ 2528 XMesaBuffer b, next; 2529 for (b=XMesaBufferList; b; b=next) { 2530 next = b->Next; 2531 if (b->display && b->frontbuffer && b->type == WINDOW) { 2532#ifdef XFree86Server 2533 /* NOT_NEEDED */ 2534#else 2535 XSync(b->display, False); 2536 if (!window_exists( b->display, b->frontbuffer )) { 2537 /* found a dead window, free the ancillary info */ 2538 XMesaDestroyBuffer( b ); 2539 } 2540#endif 2541 } 2542 } 2543} 2544 2545 2546void XMesaReset( void ) 2547{ 2548 while (XMesaBufferList) 2549 XMesaDestroyBuffer(XMesaBufferList); 2550 2551 XMesaBufferList = NULL; 2552} 2553 2554 2555unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2556 GLfloat red, GLfloat green, 2557 GLfloat blue, GLfloat alpha ) 2558{ 2559 GLint r = (GLint) (red * 255.0F); 2560 GLint g = (GLint) (green * 255.0F); 2561 GLint b = (GLint) (blue * 255.0F); 2562 GLint a = (GLint) (alpha * 255.0F); 2563 2564 (void) DitherValues; /* silence warning */ 2565 2566 switch (xmesa->pixelformat) { 2567 case PF_Index: 2568 return 0; 2569 case PF_Truecolor: 2570 { 2571 unsigned long p; 2572 PACK_TRUECOLOR( p, r, g, b ); 2573 return p; 2574 } 2575 case PF_8A8B8G8R: 2576 return PACK_8A8B8G8R( r, g, b, a ); 2577 case PF_8R8G8B: 2578 return PACK_8R8G8B( r, g, b ); 2579 case PF_5R6G5B: 2580 return PACK_5R6G5B( r, g, b ); 2581 case PF_Dither: 2582 { 2583 DITHER_SETUP; 2584 return DITHER( x, y, r, g, b ); 2585 } 2586 case PF_1Bit: 2587 /* 382 = (3*255)/2 */ 2588 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2589 case PF_HPCR: 2590 return DITHER_HPCR(x, y, r, g, b); 2591 case PF_Lookup: 2592 { 2593 LOOKUP_SETUP; 2594 return LOOKUP( r, g, b ); 2595 } 2596 case PF_Grayscale: 2597 return GRAY_RGB( r, g, b ); 2598 case PF_Dither_5R6G5B: 2599 /* fall through */ 2600 case PF_Dither_True: 2601 { 2602 unsigned long p; 2603 PACK_TRUEDITHER(p, x, y, r, g, b); 2604 return p; 2605 } 2606 default: 2607 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2608 } 2609 return 0; 2610} 2611 2612 2613/* 2614 * This is typically called when the window size changes and we need 2615 * to reallocate the buffer's back/depth/stencil/accum buffers. 2616 */ 2617void XMesaResizeBuffers( XMesaBuffer b ) 2618{ 2619 xmesa_resize_buffers( &(b->mesa_buffer) ); 2620 2621} 2622 2623