xm_api.c revision 1e24d3318df57b36e3b68695ff64b4b8bd822c9e
1/* $Id: xm_api.c,v 1.55 2003/04/01 17:28:11 brianp Exp $ */ 2 3/* 4 * Mesa 3-D graphics library 5 * Version: 5.0.1 6 * 7 * Copyright (C) 1999-2003 Brian Paul All Rights Reserved. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included 17 * in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 */ 26/* $XFree86: xc/extras/Mesa/src/X/xm_api.c,v 1.2 2002/02/26 23:37:31 tsi Exp $ */ 27 28/* 29 * This file contains the implementations of all the XMesa* functions. 30 * 31 * 32 * NOTES: 33 * 34 * The window coordinate system origin (0,0) is in the lower-left corner 35 * of the window. X11's window coordinate origin is in the upper-left 36 * corner of the window. Therefore, most drawing functions in this 37 * file have to flip Y coordinates. 38 * 39 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 40 * in support for the MIT Shared Memory extension. If enabled, when you 41 * use an Ximage for the back buffer in double buffered mode, the "swap" 42 * operation will be faster. You must also link with -lXext. 43 * 44 * Byte swapping: If the Mesa host and the X display use a different 45 * byte order then there's some trickiness to be aware of when using 46 * XImages. The byte ordering used for the XImage is that of the X 47 * display, not the Mesa host. 48 * The color-to-pixel encoding for True/DirectColor must be done 49 * according to the display's visual red_mask, green_mask, and blue_mask. 50 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 51 * do byte swapping if needed. If one wants to directly "poke" the pixel 52 * into the XImage's buffer then the pixel must be byte swapped first. In 53 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 54 * and use XPutPixel everywhere except in the implementation of 55 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 56 * instead of using XPutPixel we "poke" our values after byte-swapping 57 * the clear pixel value if needed. 58 * 59 */ 60 61#ifdef __CYGWIN__ 62#undef WIN32 63#undef __WIN32__ 64#endif 65 66#include "glxheader.h" 67#include "GL/xmesa.h" 68#include "xmesaP.h" 69#include "context.h" 70#include "extensions.h" 71#include "glthread.h" 72#include "imports.h" 73#include "matrix.h" 74#include "mtypes.h" 75#include "macros.h" 76#include "texformat.h" 77#include "texobj.h" 78#include "texstore.h" 79#include "swrast/swrast.h" 80#include "swrast_setup/swrast_setup.h" 81#include "array_cache/acache.h" 82#include "tnl/tnl.h" 83 84#ifndef GLX_NONE_EXT 85#define GLX_NONE_EXT 0x8000 86#endif 87 88 89/* 90 * Global X driver lock 91 */ 92_glthread_Mutex _xmesa_lock; 93 94 95 96/* 97 * Lookup tables for HPCR pixel format: 98 */ 99static short hpcr_rgbTbl[3][256] = { 100{ 101 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 102 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 103 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 104 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 105 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 106 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 107 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 108 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 109112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 110128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 111144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 112160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 113176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 114192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 115208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 116224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 117}, 118{ 119 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 120 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 121 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 122 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 123 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 124 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 125 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 126 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 127112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 129144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 130160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 131176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 132192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 133208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 134224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 135}, 136{ 137 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 138 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 139 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 140 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 141 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 142 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 143 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 144 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 145 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 146112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 147128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 148144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 149160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 150176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 151192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 152208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 153} 154}; 155 156 157 158/**********************************************************************/ 159/***** X Utility Functions *****/ 160/**********************************************************************/ 161 162 163/* 164 * Return the host's byte order as LSBFirst or MSBFirst ala X. 165 */ 166#ifndef XFree86Server 167static int host_byte_order( void ) 168{ 169 int i = 1; 170 char *cptr = (char *) &i; 171 return (*cptr==1) ? LSBFirst : MSBFirst; 172} 173#endif 174 175 176/* 177 * Error handling. 178 */ 179#ifndef XFree86Server 180static int mesaXErrorFlag = 0; 181 182static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 183{ 184 (void) dpy; 185 (void) event; 186 mesaXErrorFlag = 1; 187 return 0; 188} 189#endif 190 191 192/* 193 * Check if the X Shared Memory extension is available. 194 * Return: 0 = not available 195 * 1 = shared XImage support available 196 * 2 = shared Pixmap support available also 197 */ 198#ifndef XFree86Server 199static int check_for_xshm( XMesaDisplay *display ) 200{ 201#ifdef USE_XSHM 202 int major, minor, ignore; 203 Bool pixmaps; 204 205 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 206 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 207 return (pixmaps==True) ? 2 : 1; 208 } 209 else { 210 return 0; 211 } 212 } 213 else { 214 return 0; 215 } 216#else 217 /* Can't compile XSHM support */ 218 return 0; 219#endif 220} 221#endif 222 223 224/* 225 * Return the width and height of the given drawable. 226 */ 227static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 228 unsigned int *width, unsigned int *height) 229{ 230#ifdef XFree86Server 231 (void) dpy; 232 *width = d->width; 233 *height = d->height; 234#else 235 Window root; 236 int x, y; 237 unsigned int bw, depth; 238 239 _glthread_LOCK_MUTEX(_xmesa_lock); 240 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 241 _glthread_UNLOCK_MUTEX(_xmesa_lock); 242#endif 243} 244 245 246/* 247 * Apply gamma correction to an intensity value in [0..max]. Return the 248 * new intensity value. 249 */ 250static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 251{ 252 if (gamma == 1.0) { 253 return value; 254 } 255 else { 256 double x = (double) value / (double) max; 257 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 258 } 259} 260 261 262 263/* 264 * Return the true number of bits per pixel for XImages. 265 * For example, if we request a 24-bit deep visual we may actually need/get 266 * 32bpp XImages. This function returns the appropriate bpp. 267 * Input: dpy - the X display 268 * visinfo - desribes the visual to be used for XImages 269 * Return: true number of bits per pixel for XImages 270 */ 271#ifdef XFree86Server 272 273static int bits_per_pixel( XMesaVisual xmv ) 274{ 275 XMesaVisualInfo visinfo = xmv->visinfo; 276 const int depth = visinfo->nplanes; 277 int i; 278 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 279 if (screenInfo.formats[i].depth == depth) 280 return screenInfo.formats[i].bitsPerPixel; 281 } 282 return depth; /* should never get here, but this should be safe */ 283} 284 285#else 286 287static int bits_per_pixel( XMesaVisual xmv ) 288{ 289 XMesaDisplay *dpy = xmv->display; 290 XMesaVisualInfo visinfo = xmv->visinfo; 291 XMesaImage *img; 292 int bitsPerPixel; 293 /* Create a temporary XImage */ 294 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 295 ZPixmap, 0, /*format, offset*/ 296 (char*) MALLOC(8), /*data*/ 297 1, 1, /*width, height*/ 298 32, /*bitmap_pad*/ 299 0 /*bytes_per_line*/ 300 ); 301 assert(img); 302 /* grab the bits/pixel value */ 303 bitsPerPixel = img->bits_per_pixel; 304 /* free the XImage */ 305 FREE( img->data ); 306 img->data = NULL; 307 XMesaDestroyImage( img ); 308 return bitsPerPixel; 309} 310#endif 311 312 313 314/* 315 * Determine if a given X window ID is valid (window exists). 316 * Do this by calling XGetWindowAttributes() for the window and 317 * checking if we catch an X error. 318 * Input: dpy - the display 319 * win - the window to check for existance 320 * Return: GL_TRUE - window exists 321 * GL_FALSE - window doesn't exist 322 */ 323#ifndef XFree86Server 324static GLboolean WindowExistsFlag; 325 326static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 327{ 328 (void) dpy; 329 if (xerr->error_code == BadWindow) { 330 WindowExistsFlag = GL_FALSE; 331 } 332 return 0; 333} 334 335static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 336{ 337 XWindowAttributes wa; 338 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 339 WindowExistsFlag = GL_TRUE; 340 old_handler = XSetErrorHandler(window_exists_err_handler); 341 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 342 XSetErrorHandler(old_handler); 343 return WindowExistsFlag; 344} 345#endif 346 347 348 349/**********************************************************************/ 350/***** Linked list of XMesaBuffers *****/ 351/**********************************************************************/ 352 353static XMesaBuffer XMesaBufferList = NULL; 354 355 356/* Allocate a new XMesaBuffer, add to linked list */ 357static XMesaBuffer alloc_xmesa_buffer(void) 358{ 359 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 360 if (b) { 361 b->Next = XMesaBufferList; 362 XMesaBufferList = b; 363 } 364 return b; 365} 366 367 368/* 369 * Find an XMesaBuffer by matching X display and colormap but NOT matching 370 * the notThis buffer. 371 */ 372static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 373 XMesaColormap cmap, 374 XMesaBuffer notThis) 375{ 376 XMesaBuffer b; 377 for (b=XMesaBufferList; b; b=b->Next) { 378 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 379 return b; 380 } 381 } 382 return NULL; 383} 384 385 386/* 387 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 388 * entries. 389 */ 390static void free_xmesa_buffer(int client, XMesaBuffer buffer) 391{ 392 XMesaBuffer prev = NULL, b; 393 (void) client; 394 for (b=XMesaBufferList; b; b=b->Next) { 395 if (b==buffer) { 396 /* unlink bufer from list */ 397 if (prev) 398 prev->Next = buffer->Next; 399 else 400 XMesaBufferList = buffer->Next; 401 /* Check to free X colors */ 402 if (buffer->num_alloced>0) { 403 /* If no other buffer uses this X colormap then free the colors. */ 404 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 405#ifdef XFree86Server 406 (void)FreeColors(buffer->cmap, client, 407 buffer->num_alloced, buffer->alloced_colors, 408 0); 409#else 410 XFreeColors(buffer->display, buffer->cmap, 411 buffer->alloced_colors, buffer->num_alloced, 0); 412#endif 413 } 414 } 415 416 _mesa_free_framebuffer_data(&buffer->mesa_buffer); 417 FREE(buffer); 418 419 return; 420 } 421 /* continue search */ 422 prev = b; 423 } 424 /* buffer not found in XMesaBufferList */ 425 _mesa_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 426} 427 428 429/* Copy X color table stuff from one XMesaBuffer to another. */ 430static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 431{ 432 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 433 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 434 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 435 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 436 dst->num_alloced = src->num_alloced; 437 MEMCPY(dst->alloced_colors, src->alloced_colors, 438 sizeof(src->alloced_colors)); 439} 440 441 442 443/**********************************************************************/ 444/***** Misc Private Functions *****/ 445/**********************************************************************/ 446 447 448/* 449 * Return number of bits set in n. 450 */ 451static int bitcount( unsigned long n ) 452{ 453 int bits; 454 for (bits=0; n>0; n=n>>1) { 455 if (n&1) { 456 bits++; 457 } 458 } 459 return bits; 460} 461 462 463 464/* 465 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 466 * Return: GL_TRUE if success, GL_FALSE if error 467 */ 468#ifndef XFree86Server 469static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 470{ 471#ifdef USE_XSHM 472 /* 473 * We have to do a _lot_ of error checking here to be sure we can 474 * really use the XSHM extension. It seems different servers trigger 475 * errors at different points if the extension won't work. Therefore 476 * we have to be very careful... 477 */ 478 GC gc; 479 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 480 481 b->backimage = XShmCreateImage( b->xm_visual->display, 482 b->xm_visual->visinfo->visual, 483 b->xm_visual->visinfo->depth, 484 ZPixmap, NULL, &b->shminfo, 485 b->width, b->height ); 486 if (b->backimage == NULL) { 487 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 488 b->shm = 0; 489 return GL_FALSE; 490 } 491 492 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 493 * b->backimage->height, IPC_CREAT|0777 ); 494 if (b->shminfo.shmid < 0) { 495 _mesa_warning(NULL, "shmget failed while allocating back buffer"); 496 XDestroyImage( b->backimage ); 497 b->backimage = NULL; 498 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmget), disabling."); 499 b->shm = 0; 500 return GL_FALSE; 501 } 502 503 b->shminfo.shmaddr = b->backimage->data 504 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 505 if (b->shminfo.shmaddr == (char *) -1) { 506 _mesa_warning(NULL, "shmat() failed while allocating back buffer"); 507 XDestroyImage( b->backimage ); 508 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 509 b->backimage = NULL; 510 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmat), disabling."); 511 b->shm = 0; 512 return GL_FALSE; 513 } 514 515 b->shminfo.readOnly = False; 516 mesaXErrorFlag = 0; 517 old_handler = XSetErrorHandler( mesaHandleXError ); 518 /* This may trigger the X protocol error we're ready to catch: */ 519 XShmAttach( b->xm_visual->display, &b->shminfo ); 520 XSync( b->xm_visual->display, False ); 521 522 if (mesaXErrorFlag) { 523 /* we are on a remote display, this error is normal, don't print it */ 524 XFlush( b->xm_visual->display ); 525 mesaXErrorFlag = 0; 526 XDestroyImage( b->backimage ); 527 shmdt( b->shminfo.shmaddr ); 528 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 529 b->backimage = NULL; 530 b->shm = 0; 531 (void) XSetErrorHandler( old_handler ); 532 return GL_FALSE; 533 } 534 535 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 536 537 /* Finally, try an XShmPutImage to be really sure the extension works */ 538 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 539 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 540 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 541 XSync( b->xm_visual->display, False ); 542 XFreeGC( b->xm_visual->display, gc ); 543 (void) XSetErrorHandler( old_handler ); 544 if (mesaXErrorFlag) { 545 XFlush( b->xm_visual->display ); 546 mesaXErrorFlag = 0; 547 XDestroyImage( b->backimage ); 548 shmdt( b->shminfo.shmaddr ); 549 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 550 b->backimage = NULL; 551 b->shm = 0; 552 return GL_FALSE; 553 } 554 555 if (b->backimage) { 556 int height = b->backimage->height; 557 /* Needed by PIXELADDR1 macro */ 558 b->ximage_width1 = b->backimage->bytes_per_line; 559 b->ximage_origin1 = (GLubyte *) b->backimage->data 560 + b->ximage_width1 * (height-1); 561 /* Needed by PIXELADDR2 macro */ 562 b->ximage_width2 = b->backimage->bytes_per_line / 2; 563 b->ximage_origin2 = (GLushort *) b->backimage->data 564 + b->ximage_width2 * (height-1); 565 /* Needed by PIXELADDR3 macro */ 566 b->ximage_width3 = b->backimage->bytes_per_line; 567 b->ximage_origin3 = (GLubyte *) b->backimage->data 568 + b->ximage_width3 * (height-1); 569 /* Needed by PIXELADDR4 macro */ 570 b->ximage_width4 = b->backimage->width; 571 b->ximage_origin4 = (GLuint *) b->backimage->data 572 + b->ximage_width4 * (height-1); 573 } 574 575 return GL_TRUE; 576#else 577 /* Can't compile XSHM support */ 578 return GL_FALSE; 579#endif 580} 581#endif 582 583 584 585/* 586 * Setup an off-screen pixmap or Ximage to use as the back buffer. 587 * Input: b - the X/Mesa buffer 588 */ 589void xmesa_alloc_back_buffer( XMesaBuffer b ) 590{ 591 if (b->db_state==BACK_XIMAGE) { 592 /* Deallocate the old backimage, if any */ 593 if (b->backimage) { 594#if defined(USE_XSHM) && !defined(XFree86Server) 595 if (b->shm) { 596 XShmDetach( b->xm_visual->display, &b->shminfo ); 597 XDestroyImage( b->backimage ); 598 shmdt( b->shminfo.shmaddr ); 599 } 600 else 601#endif 602 XMesaDestroyImage( b->backimage ); 603 b->backimage = NULL; 604 } 605 606 /* Allocate new back buffer */ 607#ifdef XFree86Server 608 { 609 /* Allocate a regular XImage for the back buffer. */ 610 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 611 b->width, b->height, NULL); 612#else 613 if (b->shm==0 || alloc_shm_back_buffer(b)==GL_FALSE) { 614 /* Allocate a regular XImage for the back buffer. */ 615 b->backimage = XCreateImage( b->xm_visual->display, 616 b->xm_visual->visinfo->visual, 617 GET_VISUAL_DEPTH(b->xm_visual), 618 ZPixmap, 0, /* format, offset */ 619 NULL, b->width, b->height, 620 8, 0 ); /* pad, bytes_per_line */ 621#endif 622 if (!b->backimage) { 623 _mesa_warning(NULL, "alloc_back_buffer: XCreateImage failed."); 624 } 625 b->backimage->data = (char *) MALLOC( b->backimage->height 626 * b->backimage->bytes_per_line ); 627 if (!b->backimage->data) { 628 _mesa_warning(NULL, "alloc_back_buffer: MALLOC failed."); 629 XMesaDestroyImage( b->backimage ); 630 b->backimage = NULL; 631 } 632 } 633 b->backpixmap = None; 634 } 635 else if (b->db_state==BACK_PIXMAP) { 636 XMesaPixmap old_pixmap = b->backpixmap; 637 /* Free the old back pixmap */ 638 if (b->backpixmap) { 639 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 640 } 641 /* Allocate new back pixmap */ 642 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 643 b->width, b->height, 644 GET_VISUAL_DEPTH(b->xm_visual) ); 645 b->backimage = NULL; 646 /* update other references to backpixmap */ 647 if (b->buffer==(XMesaDrawable)old_pixmap) { 648 b->buffer = (XMesaDrawable)b->backpixmap; 649 } 650 } 651} 652 653 654 655/* 656 * A replacement for XAllocColor. This function should never 657 * fail to allocate a color. When XAllocColor fails, we return 658 * the nearest matching color. If we have to allocate many colors 659 * this function isn't too efficient; the XQueryColors() could be 660 * done just once. 661 * Written by Michael Pichler, Brian Paul, Mark Kilgard 662 * Input: dpy - X display 663 * cmap - X colormap 664 * cmapSize - size of colormap 665 * In/Out: color - the XColor struct 666 * Output: exact - 1=exact color match, 0=closest match 667 * alloced - 1=XAlloc worked, 0=XAlloc failed 668 */ 669static void 670noFaultXAllocColor( int client, 671 XMesaDisplay *dpy, 672 XMesaColormap cmap, 673 int cmapSize, 674 XMesaColor *color, 675 int *exact, int *alloced ) 676{ 677#ifdef XFree86Server 678 Pixel *ppixIn; 679 xrgb *ctable; 680#else 681 /* we'll try to cache ctable for better remote display performance */ 682 static Display *prevDisplay = NULL; 683 static XMesaColormap prevCmap = 0; 684 static int prevCmapSize = 0; 685 static XMesaColor *ctable = NULL; 686#endif 687 XMesaColor subColor; 688 int i, bestmatch; 689 double mindist; /* 3*2^16^2 exceeds long int precision. */ 690 691 (void) client; 692 693 /* First try just using XAllocColor. */ 694#ifdef XFree86Server 695 if (AllocColor(cmap, 696 &color->red, &color->green, &color->blue, 697 &color->pixel, 698 client) == Success) { 699#else 700 if (XAllocColor(dpy, cmap, color)) { 701#endif 702 *exact = 1; 703 *alloced = 1; 704 return; 705 } 706 707 /* Alloc failed, search for closest match */ 708 709 /* Retrieve color table entries. */ 710 /* XXX alloca candidate. */ 711#ifdef XFree86Server 712 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 713 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 714 for (i = 0; i < cmapSize; i++) { 715 ppixIn[i] = i; 716 } 717 QueryColors(cmap, cmapSize, ppixIn, ctable); 718#else 719 if (prevDisplay != dpy || prevCmap != cmap 720 || prevCmapSize != cmapSize || !ctable) { 721 /* free previously cached color table */ 722 if (ctable) 723 FREE(ctable); 724 /* Get the color table from X */ 725 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 726 assert(ctable); 727 for (i = 0; i < cmapSize; i++) { 728 ctable[i].pixel = i; 729 } 730 XQueryColors(dpy, cmap, ctable, cmapSize); 731 prevDisplay = dpy; 732 prevCmap = cmap; 733 prevCmapSize = cmapSize; 734 } 735#endif 736 737 /* Find best match. */ 738 bestmatch = -1; 739 mindist = 0.0; 740 for (i = 0; i < cmapSize; i++) { 741 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 742 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 743 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 744 double dist = dr * dr + dg * dg + db * db; 745 if (bestmatch < 0 || dist < mindist) { 746 bestmatch = i; 747 mindist = dist; 748 } 749 } 750 751 /* Return result. */ 752 subColor.red = ctable[bestmatch].red; 753 subColor.green = ctable[bestmatch].green; 754 subColor.blue = ctable[bestmatch].blue; 755 /* Try to allocate the closest match color. This should only 756 * fail if the cell is read/write. Otherwise, we're incrementing 757 * the cell's reference count. 758 */ 759#ifdef XFree86Server 760 if (AllocColor(cmap, 761 &subColor.red, &subColor.green, &subColor.blue, 762 &subColor.pixel, 763 client) == Success) { 764#else 765 if (XAllocColor(dpy, cmap, &subColor)) { 766#endif 767 *alloced = 1; 768 } 769 else { 770 /* do this to work around a problem reported by Frank Ortega */ 771 subColor.pixel = (unsigned long) bestmatch; 772 subColor.red = ctable[bestmatch].red; 773 subColor.green = ctable[bestmatch].green; 774 subColor.blue = ctable[bestmatch].blue; 775 subColor.flags = DoRed | DoGreen | DoBlue; 776 *alloced = 0; 777 } 778#ifdef XFree86Server 779 FREE(ppixIn); 780 FREE(ctable); 781#else 782 /* don't free table, save it for next time */ 783#endif 784 785 *color = subColor; 786 *exact = 0; 787} 788 789 790 791 792/* 793 * Do setup for PF_GRAYSCALE pixel format. 794 * Note that buffer may be NULL. 795 */ 796static GLboolean setup_grayscale( int client, XMesaVisual v, 797 XMesaBuffer buffer, XMesaColormap cmap ) 798{ 799 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 800 return GL_FALSE; 801 } 802 803 if (buffer) { 804 XMesaBuffer prevBuffer; 805 806 if (!cmap) { 807 return GL_FALSE; 808 } 809 810 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 811 if (prevBuffer && 812 (buffer->xm_visual->mesa_visual.rgbMode == 813 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 814 /* Copy colormap stuff from previous XMesaBuffer which uses same 815 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 816 */ 817 copy_colortable_info(buffer, prevBuffer); 818 } 819 else { 820 /* Allocate 256 shades of gray */ 821 int gray; 822 int colorsfailed = 0; 823 for (gray=0;gray<256;gray++) { 824 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 825 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 826 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 827 int exact, alloced; 828 XMesaColor xcol; 829 xcol.red = (r << 8) | r; 830 xcol.green = (g << 8) | g; 831 xcol.blue = (b << 8) | b; 832 noFaultXAllocColor( client, v->display, 833 cmap, GET_COLORMAP_SIZE(v), 834 &xcol, &exact, &alloced ); 835 if (!exact) { 836 colorsfailed++; 837 } 838 if (alloced) { 839 assert(buffer->num_alloced<256); 840 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 841 buffer->num_alloced++; 842 } 843 844 /*OLD 845 assert(gray < 576); 846 buffer->color_table[gray*3+0] = xcol.pixel; 847 buffer->color_table[gray*3+1] = xcol.pixel; 848 buffer->color_table[gray*3+2] = xcol.pixel; 849 assert(xcol.pixel < 65536); 850 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 851 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 852 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 853 */ 854 buffer->color_table[gray] = xcol.pixel; 855 assert(xcol.pixel < 65536); 856 buffer->pixel_to_r[xcol.pixel] = gray; 857 buffer->pixel_to_g[xcol.pixel] = gray; 858 buffer->pixel_to_b[xcol.pixel] = gray; 859 } 860 861 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 862 _mesa_warning(NULL, 863 "Note: %d out of 256 needed colors do not match exactly.\n", 864 colorsfailed ); 865 } 866 } 867 } 868 869 v->dithered_pf = PF_Grayscale; 870 v->undithered_pf = PF_Grayscale; 871 return GL_TRUE; 872} 873 874 875 876/* 877 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 878 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 879 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 880 * color. While this function was originally designed just for 8-bit 881 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 882 * Dithering code contributed by Bob Mercier. 883 */ 884static GLboolean setup_dithered_color( int client, XMesaVisual v, 885 XMesaBuffer buffer, XMesaColormap cmap ) 886{ 887 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 888 return GL_FALSE; 889 } 890 891 if (buffer) { 892 XMesaBuffer prevBuffer; 893 894 if (!cmap) { 895 return GL_FALSE; 896 } 897 898 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 899 if (prevBuffer && 900 (buffer->xm_visual->mesa_visual.rgbMode == 901 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 902 /* Copy colormap stuff from previous, matching XMesaBuffer. 903 * Do this to avoid time spent in noFaultXAllocColor. 904 */ 905 copy_colortable_info(buffer, prevBuffer); 906 } 907 else { 908 /* Allocate X colors and initialize color_table[], red_table[], etc */ 909 int r, g, b, i; 910 int colorsfailed = 0; 911 for (r = 0; r < DITH_R; r++) { 912 for (g = 0; g < DITH_G; g++) { 913 for (b = 0; b < DITH_B; b++) { 914 XMesaColor xcol; 915 int exact, alloced; 916 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 917 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 918 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 919 noFaultXAllocColor( client, v->display, 920 cmap, GET_COLORMAP_SIZE(v), 921 &xcol, &exact, &alloced ); 922 if (!exact) { 923 colorsfailed++; 924 } 925 if (alloced) { 926 assert(buffer->num_alloced<256); 927 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 928 buffer->num_alloced++; 929 } 930 i = DITH_MIX( r, g, b ); 931 assert(i < 576); 932 buffer->color_table[i] = xcol.pixel; 933 assert(xcol.pixel < 65536); 934 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 935 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 936 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 937 } 938 } 939 } 940 941 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 942 _mesa_warning(NULL, 943 "Note: %d out of %d needed colors do not match exactly.\n", 944 colorsfailed, DITH_R * DITH_G * DITH_B ); 945 } 946 } 947 } 948 949 v->dithered_pf = PF_Dither; 950 v->undithered_pf = PF_Lookup; 951 return GL_TRUE; 952} 953 954 955/* 956 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 957 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 958 * Special dithering tables have to be initialized. 959 */ 960static void setup_8bit_hpcr( XMesaVisual v ) 961{ 962 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 963 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 964 * on the root window AND the colormap obtainable by XGetRGBColormaps 965 * for that atom must be set on the window. (see also tkInitWindow) 966 * If that colormap is not set, the output will look stripy. 967 */ 968 969 /* Setup color tables with gamma correction */ 970 int i; 971 double g; 972 973 g = 1.0 / v->RedGamma; 974 for (i=0; i<256; i++) { 975 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 976 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 977 } 978 979 g = 1.0 / v->GreenGamma; 980 for (i=0; i<256; i++) { 981 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 982 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 983 } 984 985 g = 1.0 / v->BlueGamma; 986 for (i=0; i<256; i++) { 987 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 988 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 989 } 990 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 991 v->dithered_pf = PF_HPCR; 992 993 /* which method should I use to clear */ 994 /* GL_FALSE: keep the ordinary method */ 995 /* GL_TRUE : clear with dither pattern */ 996 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 997 998 if (v->hpcr_clear_flag) { 999 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 1000 DefaultRootWindow(v->display), 1001 16, 2, 8); 1002#ifndef XFree86Server 1003 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1004 0, 0, 16, 2, AllPlanes, ZPixmap); 1005#endif 1006 } 1007} 1008 1009 1010/* 1011 * Setup RGB rendering for a window with a True/DirectColor visual. 1012 */ 1013static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1014 XMesaColormap cmap ) 1015{ 1016 unsigned long rmask, gmask, bmask; 1017 (void) buffer; 1018 (void) cmap; 1019 1020 /* Compute red multiplier (mask) and bit shift */ 1021 v->rshift = 0; 1022 rmask = GET_REDMASK(v); 1023 while ((rmask & 1)==0) { 1024 v->rshift++; 1025 rmask = rmask >> 1; 1026 } 1027 1028 /* Compute green multiplier (mask) and bit shift */ 1029 v->gshift = 0; 1030 gmask = GET_GREENMASK(v); 1031 while ((gmask & 1)==0) { 1032 v->gshift++; 1033 gmask = gmask >> 1; 1034 } 1035 1036 /* Compute blue multiplier (mask) and bit shift */ 1037 v->bshift = 0; 1038 bmask = GET_BLUEMASK(v); 1039 while ((bmask & 1)==0) { 1040 v->bshift++; 1041 bmask = bmask >> 1; 1042 } 1043 1044 /* 1045 * Compute component-to-pixel lookup tables and dithering kernel 1046 */ 1047 { 1048 static GLubyte kernel[16] = { 1049 0*16, 8*16, 2*16, 10*16, 1050 12*16, 4*16, 14*16, 6*16, 1051 3*16, 11*16, 1*16, 9*16, 1052 15*16, 7*16, 13*16, 5*16, 1053 }; 1054 GLint rBits = bitcount(rmask); 1055 GLint gBits = bitcount(gmask); 1056 GLint bBits = bitcount(bmask); 1057 GLint maxBits; 1058 GLuint i; 1059 1060 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1061 for (i=0; i<=rmask; i++) 1062 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1063 for (i=0; i<=gmask; i++) 1064 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1065 for (i=0; i<=bmask; i++) 1066 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1067 1068 /* convert RGB values from [0,255] to pixel components */ 1069 1070 for (i=0;i<256;i++) { 1071 GLint r = gamma_adjust(v->RedGamma, i, 255); 1072 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1073 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1074 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1075 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1076 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1077 } 1078 /* overflow protection */ 1079 for (i=256;i<512;i++) { 1080 v->RtoPixel[i] = v->RtoPixel[255]; 1081 v->GtoPixel[i] = v->GtoPixel[255]; 1082 v->BtoPixel[i] = v->BtoPixel[255]; 1083 } 1084 1085 /* setup dithering kernel */ 1086 maxBits = rBits; 1087 if (gBits > maxBits) maxBits = gBits; 1088 if (bBits > maxBits) maxBits = bBits; 1089 for (i=0;i<16;i++) { 1090 v->Kernel[i] = kernel[i] >> maxBits; 1091 } 1092 1093 v->undithered_pf = PF_Truecolor; 1094 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 1095 } 1096 1097 /* 1098 * Now check for TrueColor visuals which we can optimize. 1099 */ 1100 if ( GET_REDMASK(v) ==0x0000ff 1101 && GET_GREENMASK(v)==0x00ff00 1102 && GET_BLUEMASK(v) ==0xff0000 1103 && CHECK_BYTE_ORDER(v) 1104 && v->BitsPerPixel==32 1105 && sizeof(GLuint)==4 1106 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1107 /* common 32 bpp config used on SGI, Sun */ 1108 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1109 } 1110 else if (GET_REDMASK(v) ==0xff0000 1111 && GET_GREENMASK(v)==0x00ff00 1112 && GET_BLUEMASK(v) ==0x0000ff 1113 && CHECK_BYTE_ORDER(v) 1114 && v->BitsPerPixel==32 1115 && sizeof(GLuint)==4 1116 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1117 /* common 32 bpp config used on Linux, HP, IBM */ 1118 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1119 } 1120 else if (GET_REDMASK(v) ==0xff0000 1121 && GET_GREENMASK(v)==0x00ff00 1122 && GET_BLUEMASK(v) ==0x0000ff 1123 && CHECK_BYTE_ORDER(v) 1124 && v->BitsPerPixel==24 1125 && sizeof(GLuint)==4 1126 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1127 /* common packed 24 bpp config used on Linux */ 1128 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1129 } 1130 else if (GET_REDMASK(v) ==0xf800 1131 && GET_GREENMASK(v)==0x07e0 1132 && GET_BLUEMASK(v) ==0x001f 1133 && CHECK_BYTE_ORDER(v) 1134 && v->BitsPerPixel==16 1135 && sizeof(GLushort)==2 1136 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1137 /* 5-6-5 color weight on common PC VGA boards */ 1138 v->undithered_pf = PF_5R6G5B; 1139 v->dithered_pf = PF_Dither_5R6G5B; 1140 } 1141 else if (GET_REDMASK(v) ==0xe0 1142 && GET_GREENMASK(v)==0x1c 1143 && GET_BLUEMASK(v) ==0x03 1144 && CHECK_FOR_HPCR(v)) { 1145 setup_8bit_hpcr( v ); 1146 } 1147} 1148 1149 1150 1151/* 1152 * Setup RGB rendering for a window with a monochrome visual. 1153 */ 1154static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1155{ 1156 (void) b; 1157 v->dithered_pf = v->undithered_pf = PF_1Bit; 1158 /* if black=1 then we must flip pixel values */ 1159 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1160} 1161 1162 1163 1164/* 1165 * When a context is "made current" for the first time, we can finally 1166 * finish initializing the context's visual and buffer information. 1167 * Input: v - the XMesaVisual to initialize 1168 * b - the XMesaBuffer to initialize (may be NULL) 1169 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1170 * window - the window/pixmap we're rendering into 1171 * cmap - the colormap associated with the window/pixmap 1172 * Return: GL_TRUE=success, GL_FALSE=failure 1173 */ 1174static GLboolean initialize_visual_and_buffer( int client, 1175 XMesaVisual v, 1176 XMesaBuffer b, 1177 GLboolean rgb_flag, 1178 XMesaDrawable window, 1179 XMesaColormap cmap ) 1180{ 1181#ifndef XFree86Server 1182 XGCValues gcvalues; 1183#endif 1184 1185 if (b) { 1186 assert(b->xm_visual == v); 1187 } 1188 1189 /* Save true bits/pixel */ 1190 v->BitsPerPixel = bits_per_pixel(v); 1191 assert(v->BitsPerPixel > 0); 1192 1193 1194 if (rgb_flag==GL_FALSE) { 1195 /* COLOR-INDEXED WINDOW: 1196 * Even if the visual is TrueColor or DirectColor we treat it as 1197 * being color indexed. This is weird but might be useful to someone. 1198 */ 1199 v->dithered_pf = v->undithered_pf = PF_Index; 1200 v->index_bits = GET_VISUAL_DEPTH(v); 1201 } 1202 else { 1203 /* RGB WINDOW: 1204 * We support RGB rendering into almost any kind of visual. 1205 */ 1206 int xclass; 1207 xclass = GET_VISUAL_CLASS(v); 1208 if (xclass==TrueColor || xclass==DirectColor) { 1209 setup_truecolor( v, b, cmap ); 1210 } 1211 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { 1212 setup_monochrome( v, b ); 1213 } 1214 else if (xclass==GrayScale || xclass==StaticGray) { 1215 if (!setup_grayscale( client, v, b, cmap )) { 1216 return GL_FALSE; 1217 } 1218 } 1219 else if ((xclass==PseudoColor || xclass==StaticColor) 1220 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1221 if (!setup_dithered_color( client, v, b, cmap )) { 1222 return GL_FALSE; 1223 } 1224 } 1225 else { 1226 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual."); 1227 return GL_FALSE; 1228 } 1229 v->index_bits = 0; 1230 1231 if (_mesa_getenv("MESA_NO_DITHER")) { 1232 v->dithered_pf = v->undithered_pf; 1233 } 1234 } 1235 1236 1237 /* 1238 * If MESA_INFO env var is set print out some debugging info 1239 * which can help Brian figure out what's going on when a user 1240 * reports bugs. 1241 */ 1242 if (_mesa_getenv("MESA_INFO")) { 1243 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1244 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1245 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1246 _mesa_printf("X/Mesa level = %d\n", v->level); 1247 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1248 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1249 } 1250 1251 if (b && window) { 1252 /* Do window-specific initializations */ 1253 1254 /* Window dimensions */ 1255 unsigned int w, h; 1256 get_drawable_size( v->display, window, &w, &h ); 1257 b->width = w; 1258 b->height = h; 1259 1260 b->frontbuffer = window; 1261 1262 /* Setup for single/double buffering */ 1263 if (v->mesa_visual.doubleBufferMode) { 1264 /* Double buffered */ 1265#ifndef XFree86Server 1266 b->shm = check_for_xshm( v->display ); 1267#endif 1268 xmesa_alloc_back_buffer( b ); 1269 if (b->db_state==BACK_PIXMAP) { 1270 b->buffer = (XMesaDrawable)b->backpixmap; 1271 } 1272 else { 1273 b->buffer = XIMAGE; 1274 } 1275 } 1276 else { 1277 /* Single Buffered */ 1278 b->buffer = b->frontbuffer; 1279 } 1280 1281 /* X11 graphics contexts */ 1282#ifdef XFree86Server 1283 b->gc = CreateScratchGC(v->display, window->depth); 1284#else 1285 b->gc = XCreateGC( v->display, window, 0, NULL ); 1286#endif 1287 XMesaSetFunction( v->display, b->gc, GXcopy ); 1288 1289 /* cleargc - for glClear() */ 1290#ifdef XFree86Server 1291 b->cleargc = CreateScratchGC(v->display, window->depth); 1292#else 1293 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1294#endif 1295 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1296 1297 /* 1298 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1299 * Patch contributed by Michael Pichler May 15, 1995. 1300 */ 1301#ifdef XFree86Server 1302 b->swapgc = CreateScratchGC(v->display, window->depth); 1303 { 1304 CARD32 v[1]; 1305 v[0] = FALSE; 1306 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1307 } 1308#else 1309 gcvalues.graphics_exposures = False; 1310 b->swapgc = XCreateGC( v->display, window, 1311 GCGraphicsExposures, &gcvalues); 1312#endif 1313 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1314 /* 1315 * Set fill style and tile pixmap once for all for HPCR stuff 1316 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1317 * Initialize whole stuff 1318 * Patch contributed by Jacques Leroy March 8, 1998. 1319 */ 1320 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1321 int i; 1322 for (i=0; i<16; i++) 1323 { 1324 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1325 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1326 } 1327 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1328 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1329 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1330 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1331 } 1332 1333 /* Initialize the row buffer XImage for use in write_color_span() */ 1334#ifdef XFree86Server 1335 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1336 (char *)MALLOC(MAX_WIDTH*4)); 1337#else 1338 b->rowimage = XCreateImage( v->display, 1339 v->visinfo->visual, 1340 v->visinfo->depth, 1341 ZPixmap, 0, /*format, offset*/ 1342 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1343 MAX_WIDTH, 1, /*width, height*/ 1344 32, /*bitmap_pad*/ 1345 0 /*bytes_per_line*/ ); 1346#endif 1347 } 1348 1349 return GL_TRUE; 1350} 1351 1352 1353 1354/* 1355 * Convert an RGBA color to a pixel value. 1356 */ 1357unsigned long 1358xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1359 GLuint pixelFormat) 1360{ 1361 switch (pixelFormat) { 1362 case PF_Index: 1363 return 0; 1364 case PF_Truecolor: 1365 { 1366 unsigned long p; 1367 PACK_TRUECOLOR( p, r, g, b ); 1368 return p; 1369 } 1370 case PF_8A8B8G8R: 1371 return PACK_8A8B8G8R( r, g, b, a ); 1372 case PF_8R8G8B: 1373 /* fall through */ 1374 case PF_8R8G8B24: 1375 return PACK_8R8G8B( r, g, b ); 1376 case PF_5R6G5B: 1377 return PACK_5R6G5B( r, g, b ); 1378 case PF_Dither: 1379 { 1380 DITHER_SETUP; 1381 return DITHER( 1, 0, r, g, b ); 1382 } 1383 case PF_1Bit: 1384 /* 382 = (3*255)/2 */ 1385 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1386 case PF_HPCR: 1387 return DITHER_HPCR(1, 1, r, g, b); 1388 case PF_Lookup: 1389 { 1390 LOOKUP_SETUP; 1391 return LOOKUP( r, g, b ); 1392 } 1393 case PF_Grayscale: 1394 return GRAY_RGB( r, g, b ); 1395 case PF_Dither_True: 1396 /* fall through */ 1397 case PF_Dither_5R6G5B: 1398 { 1399 unsigned long p; 1400 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1401 return p; 1402 } 1403 default: 1404 _mesa_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1405 } 1406 return 0; 1407} 1408 1409 1410/**********************************************************************/ 1411/***** Public Functions *****/ 1412/**********************************************************************/ 1413 1414 1415/* 1416 * Create a new X/Mesa visual. 1417 * Input: display - X11 display 1418 * visinfo - an XVisualInfo pointer 1419 * rgb_flag - GL_TRUE = RGB mode, 1420 * GL_FALSE = color index mode 1421 * alpha_flag - alpha buffer requested? 1422 * db_flag - GL_TRUE = double-buffered, 1423 * GL_FALSE = single buffered 1424 * stereo_flag - stereo visual? 1425 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1426 * GL_FALSE = use an off-screen pixmap for back buffer 1427 * depth_size - requested bits/depth values, or zero 1428 * stencil_size - requested bits/stencil values, or zero 1429 * accum_red_size - requested bits/red accum values, or zero 1430 * accum_green_size - requested bits/green accum values, or zero 1431 * accum_blue_size - requested bits/blue accum values, or zero 1432 * accum_alpha_size - requested bits/alpha accum values, or zero 1433 * num_samples - number of samples/pixel if multisampling, or zero 1434 * level - visual level, usually 0 1435 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT 1436 * Return; a new XMesaVisual or 0 if error. 1437 */ 1438XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1439 XMesaVisualInfo visinfo, 1440 GLboolean rgb_flag, 1441 GLboolean alpha_flag, 1442 GLboolean db_flag, 1443 GLboolean stereo_flag, 1444 GLboolean ximage_flag, 1445 GLint depth_size, 1446 GLint stencil_size, 1447 GLint accum_red_size, 1448 GLint accum_green_size, 1449 GLint accum_blue_size, 1450 GLint accum_alpha_size, 1451 GLint num_samples, 1452 GLint level, 1453 GLint visualCaveat ) 1454{ 1455 char *gamma; 1456 XMesaVisual v; 1457 GLint red_bits, green_bits, blue_bits, alpha_bits; 1458 1459 /* For debugging only */ 1460 if (_mesa_getenv("MESA_XSYNC")) { 1461 /* This makes debugging X easier. 1462 * In your debugger, set a breakpoint on _XError to stop when an 1463 * X protocol error is generated. 1464 */ 1465#ifdef XFree86Server 1466 /* NOT_NEEDED */ 1467#else 1468 XSynchronize( display, 1 ); 1469#endif 1470 } 1471 1472 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1473 if (!v) { 1474 return NULL; 1475 } 1476 1477 /* 1478 * In the X server, NULL is passed in for the display. It will have 1479 * to be set before using this visual. See XMesaSetVisualDisplay() 1480 * below. 1481 */ 1482 v->display = display; 1483 1484 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1485 * the struct but we may need some of the information contained in it 1486 * at a later time. 1487 */ 1488#ifdef XFree86Server 1489 v->visinfo = visinfo; 1490#else 1491 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1492 if(!v->visinfo) { 1493 FREE(v); 1494 return NULL; 1495 } 1496 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1497#endif 1498 1499#ifdef XFree86Server 1500 /* Initialize the depth of the screen */ 1501 { 1502 PixmapFormatRec *format; 1503 1504 for (format = screenInfo.formats; 1505 format->depth != display->rootDepth; 1506 format++) 1507 ; 1508 v->screen_depth = format->bitsPerPixel; 1509 } 1510#endif 1511 1512 /* check for MESA_GAMMA environment variable */ 1513 gamma = _mesa_getenv("MESA_GAMMA"); 1514 if (gamma) { 1515 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1516 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1517 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1518 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1519 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1520 } 1521 else { 1522 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1523 } 1524 1525 v->ximage_flag = ximage_flag; 1526 v->level = level; 1527 v->VisualCaveat = visualCaveat; 1528 1529 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1530 1531 { 1532 int xclass; 1533 xclass = GET_VISUAL_CLASS(v); 1534 if (xclass==TrueColor || xclass==DirectColor) { 1535 red_bits = bitcount(GET_REDMASK(v)); 1536 green_bits = bitcount(GET_GREENMASK(v)); 1537 blue_bits = bitcount(GET_BLUEMASK(v)); 1538 alpha_bits = 0; 1539 } 1540 else { 1541 /* this is an approximation */ 1542 int depth; 1543 depth = GET_VISUAL_DEPTH(v); 1544 red_bits = depth / 3; 1545 depth -= red_bits; 1546 green_bits = depth / 2; 1547 depth -= green_bits; 1548 blue_bits = depth; 1549 alpha_bits = 0; 1550 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1551 } 1552 } 1553 1554 if (alpha_flag && alpha_bits == 0) 1555 alpha_bits = 8; 1556 1557 _mesa_initialize_visual( &v->mesa_visual, 1558 rgb_flag, db_flag, stereo_flag, 1559 red_bits, green_bits, 1560 blue_bits, alpha_bits, 1561 v->index_bits, 1562 depth_size, 1563 stencil_size, 1564 accum_red_size, accum_green_size, 1565 accum_blue_size, accum_alpha_size, 1566 0 ); 1567 return v; 1568} 1569 1570 1571void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1572{ 1573 v->display = dpy; 1574} 1575 1576 1577void XMesaDestroyVisual( XMesaVisual v ) 1578{ 1579#ifndef XFree86Server 1580 FREE(v->visinfo); 1581#endif 1582 FREE(v); 1583} 1584 1585 1586 1587/* 1588 * Create a new XMesaContext. 1589 * Input: v - XMesaVisual 1590 * share_list - another XMesaContext with which to share display 1591 * lists or NULL if no sharing is wanted. 1592 * Return: an XMesaContext or NULL if error. 1593 */ 1594XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1595{ 1596 static GLboolean firstTime = GL_TRUE; 1597 XMesaContext c; 1598 GLboolean direct = GL_TRUE; /* not really */ 1599 GLcontext *mesaCtx; 1600 1601 if (firstTime) { 1602 _glthread_INIT_MUTEX(_xmesa_lock); 1603 firstTime = GL_FALSE; 1604 } 1605 1606 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1607 if (!c) { 1608 return NULL; 1609 } 1610 1611 mesaCtx = &(c->mesa); 1612 1613 /* Setup these pointers here since they're using for making the default 1614 * and proxy texture objects. Actually, we don't really need to do 1615 * this since we're using the default fallback functions which 1616 * _mesa_initialize_context() would plug in if needed. 1617 */ 1618 mesaCtx->Driver.NewTextureObject = _mesa_new_texture_object; 1619 mesaCtx->Driver.DeleteTexture = _mesa_delete_texture_object; 1620 1621 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1622 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1623 (void *) c, direct)) { 1624 FREE(c); 1625 return NULL; 1626 } 1627 1628 _mesa_enable_sw_extensions(mesaCtx); 1629 _mesa_enable_1_3_extensions(mesaCtx); 1630 _mesa_enable_1_4_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_destroy_context( mesaCtx ); 1679 1680 FREE( c ); 1681} 1682 1683 1684 1685/* 1686 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1687 * Create a new XMesaBuffer from an X window. 1688 * Input: v - the XMesaVisual 1689 * w - the window 1690 * c - the context 1691 * Return: new XMesaBuffer or NULL if error 1692 */ 1693XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1694 XMesaContext c ) 1695{ 1696#ifndef XFree86Server 1697 XWindowAttributes attr; 1698#endif 1699#ifdef FX 1700 char *fxEnvVar; 1701#endif 1702 int client = 0; 1703 1704 XMesaBuffer b = alloc_xmesa_buffer(); 1705 if (!b) { 1706 return NULL; 1707 } 1708 1709 (void) c; 1710 1711#ifdef XFree86Server 1712 client = CLIENT_ID(((XMesaDrawable)w)->id); 1713#endif 1714 1715 assert(v); 1716 1717#ifdef XFree86Server 1718 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1719#else 1720 XGetWindowAttributes( v->display, w, &attr ); 1721 1722 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1723#endif 1724 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1725 return NULL; 1726 } 1727 1728 b->xm_visual = v; 1729 b->type = WINDOW; 1730 b->display = v->display; 1731#ifdef XFree86Server 1732 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1733#else 1734 if (attr.colormap) { 1735 b->cmap = attr.colormap; 1736 } 1737 else { 1738 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1739 /* this is weird, a window w/out a colormap!? */ 1740 /* OK, let's just allocate a new one and hope for the best */ 1741 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1742 } 1743#endif 1744 1745 /* determine back buffer implementation */ 1746 if (v->mesa_visual.doubleBufferMode) { 1747 if (v->ximage_flag) { 1748 b->db_state = BACK_XIMAGE; 1749 } 1750 else { 1751 b->db_state = BACK_PIXMAP; 1752 } 1753 } 1754 else { 1755 b->db_state = 0; 1756 } 1757 1758 _mesa_initialize_framebuffer(&b->mesa_buffer, 1759 &v->mesa_visual, 1760 v->mesa_visual.depthBits > 0, 1761 v->mesa_visual.stencilBits > 0, 1762 v->mesa_visual.accumRedBits > 0, 1763 v->mesa_visual.alphaBits > 0 ); 1764 1765 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1766 (XMesaDrawable)w, b->cmap )) { 1767 free_xmesa_buffer(client, b); 1768 return NULL; 1769 } 1770 1771#ifdef FX 1772 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1773 if (fxEnvVar) { 1774 if (fxEnvVar[0]!='d') { 1775 int attribs[100]; 1776 int numAttribs = 0; 1777 int hw; 1778 if (v->mesa_visual.depthBits > 0) { 1779 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1780 attribs[numAttribs++] = 1; 1781 } 1782 if (v->mesa_visual.doubleBufferMode) { 1783 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1784 } 1785 if (v->mesa_visual.accumRedBits > 0) { 1786 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1787 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1788 } 1789 if (v->mesa_visual.stencilBits > 0) { 1790 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1791 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1792 } 1793 if (v->mesa_visual.alphaBits > 0) { 1794 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1795 attribs[numAttribs++] = 1; 1796 } 1797 if (1) { 1798#define FXMESA_SHARE_CONTEXT 990099 /* keep in sync with fxapi.c! */ 1799 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1800 attribs[numAttribs++] = (int) &(c->mesa); 1801 } 1802 attribs[numAttribs++] = FXMESA_NONE; 1803 1804 if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) { 1805 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1806 if ((v->undithered_pf!=PF_Index) && (b->backimage)) { 1807 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1808 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1809 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1810 else 1811 b->FXwindowHack = GL_FALSE; 1812 } 1813 } 1814 else { 1815 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1816 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1817 GR_REFRESH_75Hz, attribs); 1818 else 1819 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1820 b->FXisHackUsable = GL_FALSE; 1821 b->FXwindowHack = GL_FALSE; 1822 } 1823 /* 1824 fprintf(stderr, 1825 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1826 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1827 */ 1828 } 1829 } 1830 else { 1831 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1832 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1833 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1834 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1835 } 1836#endif 1837 1838 return b; 1839} 1840 1841 1842XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1843{ 1844 return XMesaCreateWindowBuffer2( v, w, NULL ); 1845} 1846 1847 1848/* 1849 * Create a new XMesaBuffer from an X pixmap. 1850 * Input: v - the XMesaVisual 1851 * p - the pixmap 1852 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor 1853 * visual for the pixmap 1854 * Return: new XMesaBuffer or NULL if error 1855 */ 1856XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1857 XMesaPixmap p, XMesaColormap cmap ) 1858{ 1859 int client = 0; 1860 XMesaBuffer b = alloc_xmesa_buffer(); 1861 if (!b) { 1862 return NULL; 1863 } 1864 1865 1866#ifdef XFree86Server 1867 client = CLIENT_ID(((XMesaDrawable)p)->id); 1868#endif 1869 1870 assert(v); 1871 1872 b->xm_visual = v; 1873 b->type = PIXMAP; 1874 b->display = v->display; 1875 b->cmap = cmap; 1876 1877 /* determine back buffer implementation */ 1878 if (v->mesa_visual.doubleBufferMode) { 1879 if (v->ximage_flag) { 1880 b->db_state = BACK_XIMAGE; 1881 } 1882 else { 1883 b->db_state = BACK_PIXMAP; 1884 } 1885 } 1886 else { 1887 b->db_state = 0; 1888 } 1889 1890 _mesa_initialize_framebuffer(&b->mesa_buffer, 1891 &v->mesa_visual, 1892 v->mesa_visual.depthBits > 0, 1893 v->mesa_visual.stencilBits > 0, 1894 v->mesa_visual.accumRedBits + 1895 v->mesa_visual.accumGreenBits + 1896 v->mesa_visual.accumBlueBits > 0, 1897 v->mesa_visual.alphaBits > 0 ); 1898 1899 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1900 (XMesaDrawable)p, cmap)) { 1901 free_xmesa_buffer(client, b); 1902 return NULL; 1903 } 1904 1905 return b; 1906} 1907 1908 1909 1910XMesaBuffer XMesaCreatePBuffer( XMesaVisual v, XMesaColormap cmap, 1911 unsigned int width, unsigned int height ) 1912{ 1913#ifdef XFree86Server 1914 return 0; 1915#else 1916 int client = 0; 1917 XMesaWindow root; 1918 XMesaDrawable drawable; /* X Pixmap Drawable */ 1919 XMesaBuffer b = alloc_xmesa_buffer(); 1920 if (!b) { 1921 return NULL; 1922 } 1923 1924 b->xm_visual = v; 1925 b->type = PBUFFER; 1926 b->display = v->display; 1927 b->cmap = cmap; 1928 1929 /* allocate pixmap for front buffer */ 1930 root = RootWindow( v->display, v->visinfo->screen ); 1931 drawable = XCreatePixmap( v->display, root, width, height, v->visinfo->depth ); 1932 1933 /* determine back buffer implementation */ 1934 if (v->mesa_visual.doubleBufferMode) { 1935 if (v->ximage_flag) { 1936 b->db_state = BACK_XIMAGE; 1937 } 1938 else { 1939 b->db_state = BACK_PIXMAP; 1940 } 1941 } 1942 else { 1943 b->db_state = 0; 1944 } 1945 1946 _mesa_initialize_framebuffer(&b->mesa_buffer, 1947 &v->mesa_visual, 1948 v->mesa_visual.depthBits > 0, 1949 v->mesa_visual.stencilBits > 0, 1950 v->mesa_visual.accumRedBits + 1951 v->mesa_visual.accumGreenBits + 1952 v->mesa_visual.accumBlueBits > 0, 1953 v->mesa_visual.alphaBits > 0 ); 1954 1955 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1956 drawable, cmap)) { 1957 free_xmesa_buffer(client, b); 1958 return NULL; 1959 } 1960 1961 return b; 1962#endif 1963} 1964 1965 1966 1967/* 1968 * Deallocate an XMesaBuffer structure and all related info. 1969 */ 1970void XMesaDestroyBuffer( XMesaBuffer b ) 1971{ 1972 int client = 0; 1973 1974#ifdef XFree86Server 1975 if (b->frontbuffer) 1976 client = CLIENT_ID(b->frontbuffer->id); 1977#endif 1978 1979 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1980 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1981 if (b->swapgc) XMesaFreeGC( b->xm_visual->display, b->swapgc ); 1982 1983 if (b->backimage) { 1984#if defined(USE_XSHM) && !defined(XFree86Server) 1985 if (b->shm) { 1986 XShmDetach( b->xm_visual->display, &b->shminfo ); 1987 XDestroyImage( b->backimage ); 1988 shmdt( b->shminfo.shmaddr ); 1989 } 1990 else 1991#endif 1992 XMesaDestroyImage( b->backimage ); 1993 } 1994 if (b->backpixmap) { 1995 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 1996 if (b->xm_visual->hpcr_clear_flag) { 1997 XMesaFreePixmap( b->xm_visual->display, 1998 b->xm_visual->hpcr_clear_pixmap ); 1999 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 2000 } 2001 } 2002 if (b->rowimage) { 2003 FREE( b->rowimage->data ); 2004 b->rowimage->data = NULL; 2005 XMesaDestroyImage( b->rowimage ); 2006 } 2007 2008 free_xmesa_buffer(client, b); 2009} 2010 2011 2012 2013/* 2014 * Bind buffer b to context c and make c the current rendering context. 2015 */ 2016GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2017{ 2018 return XMesaMakeCurrent2( c, b, b ); 2019} 2020 2021 2022/* 2023 * Bind buffer b to context c and make c the current rendering context. 2024 */ 2025GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2026 XMesaBuffer readBuffer ) 2027{ 2028 if (c) { 2029 if (!drawBuffer || !readBuffer) 2030 return GL_FALSE; /* must specify buffers! */ 2031 2032#ifdef FX 2033 if (drawBuffer->FXctx) { 2034 fxMesaMakeCurrent(drawBuffer->FXctx); 2035 2036 c->xm_draw_buffer = drawBuffer; 2037 c->xm_read_buffer = readBuffer; 2038 c->xm_buffer = drawBuffer; 2039 2040 return GL_TRUE; 2041 } 2042#endif 2043 if (&(c->mesa) == _mesa_get_current_context() 2044 && c->xm_draw_buffer == drawBuffer 2045 && c->xm_read_buffer == readBuffer 2046 && c->xm_draw_buffer->wasCurrent) { 2047 /* same context and buffer, do nothing */ 2048 return GL_TRUE; 2049 } 2050 2051 c->xm_draw_buffer = drawBuffer; 2052 c->xm_read_buffer = readBuffer; 2053 c->xm_buffer = drawBuffer; 2054 2055 _mesa_make_current2(&(c->mesa), 2056 &drawBuffer->mesa_buffer, 2057 &readBuffer->mesa_buffer); 2058 2059 if (c->mesa.Viewport.Width == 0) { 2060 /* initialize viewport to window size */ 2061 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2062 c->mesa.Scissor.Width = drawBuffer->width; 2063 c->mesa.Scissor.Height = drawBuffer->height; 2064 } 2065 2066 if (c->xm_visual->mesa_visual.rgbMode) { 2067 /* 2068 * Must recompute and set these pixel values because colormap 2069 * can be different for different windows. 2070 */ 2071 c->clearpixel = xmesa_color_to_pixel( c, 2072 c->clearcolor[0], 2073 c->clearcolor[1], 2074 c->clearcolor[2], 2075 c->clearcolor[3], 2076 c->xm_visual->undithered_pf); 2077 XMesaSetForeground(c->display, c->xm_draw_buffer->cleargc, c->clearpixel); 2078 } 2079 2080 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2081 c->xm_draw_buffer->wasCurrent = GL_TRUE; 2082 } 2083 else { 2084 /* Detach */ 2085 _mesa_make_current2( NULL, NULL, NULL ); 2086 } 2087 return GL_TRUE; 2088} 2089 2090 2091/* 2092 * Unbind the context c from its buffer. 2093 */ 2094GLboolean XMesaUnbindContext( XMesaContext c ) 2095{ 2096 /* A no-op for XFree86 integration purposes */ 2097 return GL_TRUE; 2098} 2099 2100 2101XMesaContext XMesaGetCurrentContext( void ) 2102{ 2103 GET_CURRENT_CONTEXT(ctx); 2104 if (ctx) { 2105 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2106 return xmesa; 2107 } 2108 else { 2109 return 0; 2110 } 2111} 2112 2113 2114XMesaBuffer XMesaGetCurrentBuffer( void ) 2115{ 2116 GET_CURRENT_CONTEXT(ctx); 2117 if (ctx) { 2118 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2119 return xmesa->xm_draw_buffer; 2120 } 2121 else { 2122 return 0; 2123 } 2124} 2125 2126 2127/* New in Mesa 3.1 */ 2128XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2129{ 2130 GET_CURRENT_CONTEXT(ctx); 2131 if (ctx) { 2132 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2133 return xmesa->xm_read_buffer; 2134 } 2135 else { 2136 return 0; 2137 } 2138} 2139 2140 2141GLboolean XMesaForceCurrent(XMesaContext c) 2142{ 2143 if (c) { 2144 if (&(c->mesa) != _mesa_get_current_context()) { 2145 _mesa_make_current(&(c->mesa), &c->xm_draw_buffer->mesa_buffer); 2146 } 2147 } 2148 else { 2149 _mesa_make_current(NULL, NULL); 2150 } 2151 return GL_TRUE; 2152} 2153 2154 2155GLboolean XMesaLoseCurrent(XMesaContext c) 2156{ 2157 (void) c; 2158 _mesa_make_current(NULL, NULL); 2159 return GL_TRUE; 2160} 2161 2162 2163/* 2164 * Switch 3Dfx support hack between window and full-screen mode. 2165 */ 2166GLboolean XMesaSetFXmode( GLint mode ) 2167{ 2168#ifdef FX 2169 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2170 if (fx && fx[0] != 'd') { 2171 GET_CURRENT_CONTEXT(ctx); 2172 GrHwConfiguration hw; 2173 if (!FX_grSstQueryHardware(&hw)) { 2174 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2175 return GL_FALSE; 2176 } 2177 if (hw.num_sst < 1) { 2178 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2179 return GL_FALSE; 2180 } 2181 if (ctx) { 2182 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2183 if (mode == XMESA_FX_WINDOW) { 2184 if (xmesa->xm_draw_buffer->FXisHackUsable) { 2185 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2186 xmesa->xm_draw_buffer->FXwindowHack = GL_TRUE; 2187 return GL_TRUE; 2188 } 2189 } 2190 else if (mode == XMESA_FX_FULLSCREEN) { 2191 FX_grSstControl(GR_CONTROL_ACTIVATE); 2192 xmesa->xm_draw_buffer->FXwindowHack = GL_FALSE; 2193 return GL_TRUE; 2194 } 2195 else { 2196 /* Error: Bad mode value */ 2197 } 2198 } 2199 } 2200 /*fprintf(stderr, "fallthrough\n");*/ 2201#else 2202 (void) mode; 2203#endif 2204 return GL_FALSE; 2205} 2206 2207 2208 2209#ifdef FX 2210/* 2211 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2212 */ 2213static void FXgetImage( XMesaBuffer b ) 2214{ 2215 GET_CURRENT_CONTEXT(ctx); 2216 static unsigned short pixbuf[MAX_WIDTH]; 2217 GLuint x, y; 2218 int xpos, ypos; 2219 XMesaWindow root; 2220 unsigned int bw, depth, width, height; 2221 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2222 2223#ifdef XFree86Server 2224 x = b->frontbuffer->x; 2225 y = b->frontbuffer->y; 2226 width = b->frontbuffer->width; 2227 height = b->frontbuffer->height; 2228 depth = b->frontbuffer->depth; 2229#else 2230 XGetGeometry( b->xm_visual->display, b->frontbuffer, 2231 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2232#endif 2233 if (b->width != width || b->height != height) { 2234 b->width = MIN2((int)width, b->FXctx->width); 2235 b->height = MIN2((int)height, b->FXctx->height); 2236 if (b->width & 1) 2237 b->width--; /* prevent odd width */ 2238 xmesa_alloc_back_buffer( b ); 2239 } 2240 2241 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2242 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2243 /* Special case: 16bpp RGB */ 2244 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2245 0, b->FXctx->height - b->height, /*pos*/ 2246 b->width, b->height, /* size */ 2247 b->width * sizeof(GLushort), /* stride */ 2248 b->backimage->data); /* dest buffer */ 2249 } 2250 else if (b->xm_visual->dithered_pf==PF_Dither 2251 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2252 /* Special case: 8bpp RGB */ 2253 for (y=0;y<b->height;y++) { 2254 GLubyte *ptr = (GLubyte*) b->backimage->data 2255 + b->backimage->bytes_per_line * y; 2256 XDITHER_SETUP(y); 2257 2258 /* read row from 3Dfx frame buffer */ 2259 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2260 0, b->FXctx->height-(b->height-y), 2261 b->width, 1, 2262 0, 2263 pixbuf ); 2264 2265 /* write to XImage back buffer */ 2266 for (x=0;x<b->width;x++) { 2267 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2268 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2269 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2270 *ptr++ = XDITHER( x, r, g, b); 2271 } 2272 } 2273 } 2274 else { 2275 /* General case: slow! */ 2276 for (y=0;y<b->height;y++) { 2277 /* read row from 3Dfx frame buffer */ 2278 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2279 0, b->FXctx->height-(b->height-y), 2280 b->width, 1, 2281 0, 2282 pixbuf ); 2283 2284 /* write to XImage back buffer */ 2285 for (x=0;x<b->width;x++) { 2286 XMesaPutPixel(b->backimage,x,y, 2287 xmesa_color_to_pixel(xmesa, 2288 (pixbuf[x] & 0xf800) >> 8, 2289 (pixbuf[x] & 0x07e0) >> 3, 2290 (pixbuf[x] & 0x001f) << 3, 2291 0xff, 2292 b->xm_visual->undithered_pf)); 2293 } 2294 } 2295 } 2296 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2297} 2298#endif 2299 2300 2301/* 2302 * Copy the back buffer to the front buffer. If there's no back buffer 2303 * this is a no-op. 2304 */ 2305void XMesaSwapBuffers( XMesaBuffer b ) 2306{ 2307 GET_CURRENT_CONTEXT(ctx); 2308 2309 /* If we're swapping the buffer associated with the current context 2310 * we have to flush any pending rendering commands first. 2311 */ 2312 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2313 _mesa_notifySwapBuffers(ctx); 2314 2315 if (b->db_state) { 2316#ifdef FX 2317 if (b->FXctx) { 2318 fxMesaSwapBuffers(); 2319 2320 if (b->FXwindowHack) 2321 FXgetImage(b); 2322 else 2323 return; 2324 } 2325#endif 2326 if (b->backimage) { 2327 /* Copy Ximage from host's memory to server's window */ 2328#if defined(USE_XSHM) && !defined(XFree86Server) 2329 if (b->shm) { 2330 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2331 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2332 b->swapgc, 2333 b->backimage, 0, 0, 2334 0, 0, b->width, b->height, False ); 2335 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2336 } 2337 else 2338#endif 2339 { 2340 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2341 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2342 b->swapgc, 2343 b->backimage, 0, 0, 2344 0, 0, b->width, b->height ); 2345 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2346 } 2347 } 2348 else { 2349 /* Copy pixmap to window on server */ 2350 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2351 XMesaCopyArea( b->xm_visual->display, 2352 b->backpixmap, /* source drawable */ 2353 b->frontbuffer, /* dest. drawable */ 2354 b->swapgc, 2355 0, 0, b->width, b->height, /* source region */ 2356 0, 0 /* dest region */ 2357 ); 2358 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2359 } 2360 } 2361#if !defined(XFree86Server) 2362 XSync( b->xm_visual->display, False ); 2363#endif 2364} 2365 2366 2367 2368/* 2369 * Copy sub-region of back buffer to front buffer 2370 */ 2371void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2372{ 2373 GET_CURRENT_CONTEXT(ctx); 2374 2375 /* If we're swapping the buffer associated with the current context 2376 * we have to flush any pending rendering commands first. 2377 */ 2378 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2379 _mesa_notifySwapBuffers(ctx); 2380 2381 if (b->db_state) { 2382 int yTop = b->height - y - height; 2383#ifdef FX 2384 if (b->FXctx) { 2385 fxMesaSwapBuffers(); 2386 if (b->FXwindowHack) 2387 FXgetImage(b); 2388 else 2389 return; 2390 } 2391#endif 2392 if (b->backimage) { 2393 /* Copy Ximage from host's memory to server's window */ 2394#if defined(USE_XSHM) && !defined(XFree86Server) 2395 if (b->shm) { 2396 /* XXX assuming width and height aren't too large! */ 2397 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2398 b->swapgc, 2399 b->backimage, x, yTop, 2400 x, yTop, width, height, False ); 2401 /* wait for finished event??? */ 2402 } 2403 else 2404#endif 2405 { 2406 /* XXX assuming width and height aren't too large! */ 2407 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2408 b->swapgc, 2409 b->backimage, x, yTop, 2410 x, yTop, width, height ); 2411 } 2412 } 2413 else { 2414 /* Copy pixmap to window on server */ 2415 XMesaCopyArea( b->xm_visual->display, 2416 b->backpixmap, /* source drawable */ 2417 b->frontbuffer, /* dest. drawable */ 2418 b->swapgc, 2419 x, yTop, width, height, /* source region */ 2420 x, yTop /* dest region */ 2421 ); 2422 } 2423 } 2424} 2425 2426 2427/* 2428 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2429 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2430 * back buffer directly. 2431 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2432 * ximage - pointer to back buffer's XImage, or NULL 2433 * Return: GL_TRUE = context is double buffered 2434 * GL_FALSE = context is single buffered 2435 */ 2436GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2437 XMesaPixmap *pixmap, 2438 XMesaImage **ximage ) 2439{ 2440 if (b->db_state) { 2441 if (pixmap) *pixmap = b->backpixmap; 2442 if (ximage) *ximage = b->backimage; 2443 return GL_TRUE; 2444 } 2445 else { 2446 *pixmap = 0; 2447 *ximage = NULL; 2448 return GL_FALSE; 2449 } 2450} 2451 2452 2453/* 2454 * Return the depth buffer associated with an XMesaBuffer. 2455 * Input: b - the XMesa buffer handle 2456 * Output: width, height - size of buffer in pixels 2457 * bytesPerValue - bytes per depth value (2 or 4) 2458 * buffer - pointer to depth buffer values 2459 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2460 */ 2461GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2462 GLint *bytesPerValue, void **buffer ) 2463{ 2464 if (!b->mesa_buffer.DepthBuffer) { 2465 *width = 0; 2466 *height = 0; 2467 *bytesPerValue = 0; 2468 *buffer = 0; 2469 return GL_FALSE; 2470 } 2471 else { 2472 *width = b->mesa_buffer.Width; 2473 *height = b->mesa_buffer.Height; 2474 *bytesPerValue = sizeof(GLdepth); 2475 *buffer = b->mesa_buffer.DepthBuffer; 2476 return GL_TRUE; 2477 } 2478} 2479 2480 2481void XMesaFlush( XMesaContext c ) 2482{ 2483 if (c && c->xm_visual) { 2484#ifdef XFree86Server 2485 /* NOT_NEEDED */ 2486#else 2487 XSync( c->xm_visual->display, False ); 2488#endif 2489 } 2490} 2491 2492 2493 2494const char *XMesaGetString( XMesaContext c, int name ) 2495{ 2496 (void) c; 2497 if (name==XMESA_VERSION) { 2498 return "5.0"; 2499 } 2500 else if (name==XMESA_EXTENSIONS) { 2501 return ""; 2502 } 2503 else { 2504 return NULL; 2505 } 2506} 2507 2508 2509 2510XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2511{ 2512 XMesaBuffer b; 2513 for (b=XMesaBufferList; b; b=b->Next) { 2514 if (b->frontbuffer==d && b->display==dpy) { 2515 return b; 2516 } 2517 } 2518 return NULL; 2519} 2520 2521 2522 2523/* 2524 * Look for XMesaBuffers whose X window has been destroyed. 2525 * Deallocate any such XMesaBuffers. 2526 */ 2527void XMesaGarbageCollect( void ) 2528{ 2529 XMesaBuffer b, next; 2530 for (b=XMesaBufferList; b; b=next) { 2531 next = b->Next; 2532 if (b->display && b->frontbuffer && b->type == WINDOW) { 2533#ifdef XFree86Server 2534 /* NOT_NEEDED */ 2535#else 2536 XSync(b->display, False); 2537 if (!window_exists( b->display, b->frontbuffer )) { 2538 /* found a dead window, free the ancillary info */ 2539 XMesaDestroyBuffer( b ); 2540 } 2541#endif 2542 } 2543 } 2544} 2545 2546 2547void XMesaReset( void ) 2548{ 2549 while (XMesaBufferList) 2550 XMesaDestroyBuffer(XMesaBufferList); 2551 2552 XMesaBufferList = NULL; 2553} 2554 2555 2556unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2557 GLfloat red, GLfloat green, 2558 GLfloat blue, GLfloat alpha ) 2559{ 2560 GLint r = (GLint) (red * 255.0F); 2561 GLint g = (GLint) (green * 255.0F); 2562 GLint b = (GLint) (blue * 255.0F); 2563 GLint a = (GLint) (alpha * 255.0F); 2564 2565 switch (xmesa->pixelformat) { 2566 case PF_Index: 2567 return 0; 2568 case PF_Truecolor: 2569 { 2570 unsigned long p; 2571 PACK_TRUECOLOR( p, r, g, b ); 2572 return p; 2573 } 2574 case PF_8A8B8G8R: 2575 return PACK_8A8B8G8R( r, g, b, a ); 2576 case PF_8R8G8B: 2577 return PACK_8R8G8B( r, g, b ); 2578 case PF_5R6G5B: 2579 return PACK_5R6G5B( r, g, b ); 2580 case PF_Dither: 2581 { 2582 DITHER_SETUP; 2583 return DITHER( x, y, r, g, b ); 2584 } 2585 case PF_1Bit: 2586 /* 382 = (3*255)/2 */ 2587 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2588 case PF_HPCR: 2589 return DITHER_HPCR(x, y, r, g, b); 2590 case PF_Lookup: 2591 { 2592 LOOKUP_SETUP; 2593 return LOOKUP( r, g, b ); 2594 } 2595 case PF_Grayscale: 2596 return GRAY_RGB( r, g, b ); 2597 case PF_Dither_5R6G5B: 2598 /* fall through */ 2599 case PF_Dither_True: 2600 { 2601 unsigned long p; 2602 PACK_TRUEDITHER(p, x, y, r, g, b); 2603 return p; 2604 } 2605 default: 2606 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2607 } 2608 return 0; 2609} 2610 2611 2612/* 2613 * This is typically called when the window size changes and we need 2614 * to reallocate the buffer's back/depth/stencil/accum buffers. 2615 */ 2616void XMesaResizeBuffers( XMesaBuffer b ) 2617{ 2618 xmesa_resize_buffers( &(b->mesa_buffer) ); 2619 2620} 2621 2622