xm_api.c revision b1ca87a565033a767042120288b2c45723cf79cc
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/* $XFree86: xc/extras/Mesa/src/X/xm_api.c,v 1.2 2002/02/26 23:37:31 tsi Exp $ */ 25 26/* 27 * This file contains the implementations of all the XMesa* functions. 28 * 29 * 30 * NOTES: 31 * 32 * The window coordinate system origin (0,0) is in the lower-left corner 33 * of the window. X11's window coordinate origin is in the upper-left 34 * corner of the window. Therefore, most drawing functions in this 35 * file have to flip Y coordinates. 36 * 37 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 38 * in support for the MIT Shared Memory extension. If enabled, when you 39 * use an Ximage for the back buffer in double buffered mode, the "swap" 40 * operation will be faster. You must also link with -lXext. 41 * 42 * Byte swapping: If the Mesa host and the X display use a different 43 * byte order then there's some trickiness to be aware of when using 44 * XImages. The byte ordering used for the XImage is that of the X 45 * display, not the Mesa host. 46 * The color-to-pixel encoding for True/DirectColor must be done 47 * according to the display's visual red_mask, green_mask, and blue_mask. 48 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 49 * do byte swapping if needed. If one wants to directly "poke" the pixel 50 * into the XImage's buffer then the pixel must be byte swapped first. In 51 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 52 * and use XPutPixel everywhere except in the implementation of 53 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 54 * instead of using XPutPixel we "poke" our values after byte-swapping 55 * the clear pixel value if needed. 56 * 57 */ 58 59#ifdef __CYGWIN__ 60#undef WIN32 61#undef __WIN32__ 62#endif 63 64#include "glxheader.h" 65#include "GL/xmesa.h" 66#include "xmesaP.h" 67#include "context.h" 68#include "extensions.h" 69#include "glthread.h" 70#include "imports.h" 71#include "matrix.h" 72#include "mtypes.h" 73#include "macros.h" 74#include "texformat.h" 75#include "texobj.h" 76#include "texstore.h" 77#include "swrast/swrast.h" 78#include "swrast_setup/swrast_setup.h" 79#include "array_cache/acache.h" 80#include "tnl/tnl.h" 81 82#ifndef GLX_NONE_EXT 83#define GLX_NONE_EXT 0x8000 84#endif 85 86 87/* 88 * Global X driver lock 89 */ 90_glthread_Mutex _xmesa_lock; 91 92 93 94/* 95 * Lookup tables for HPCR pixel format: 96 */ 97static short hpcr_rgbTbl[3][256] = { 98{ 99 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 100 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 101 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 102 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 103 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 104 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 105 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 106 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 107112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 108128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 109144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 110160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 111176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 112192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 113208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 114224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 115}, 116{ 117 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 118 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 119 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 120 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 121 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 122 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 123 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 124 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 125112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 126128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 127144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 128160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 129176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 130192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 131208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 132224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 133}, 134{ 135 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 136 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 137 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 138 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 139 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 140 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 141 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 142 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 143 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 144112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 145128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 146144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 147160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 148176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 149192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 150208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 151} 152}; 153 154 155 156/**********************************************************************/ 157/***** X Utility Functions *****/ 158/**********************************************************************/ 159 160 161/* 162 * Return the host's byte order as LSBFirst or MSBFirst ala X. 163 */ 164#ifndef XFree86Server 165static int host_byte_order( void ) 166{ 167 int i = 1; 168 char *cptr = (char *) &i; 169 return (*cptr==1) ? LSBFirst : MSBFirst; 170} 171#endif 172 173 174/* 175 * Error handling. 176 */ 177#ifndef XFree86Server 178static volatile int mesaXErrorFlag = 0; 179 180static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 181{ 182 (void) dpy; 183 (void) event; 184 mesaXErrorFlag = 1; 185 return 0; 186} 187#endif 188 189 190/* 191 * Check if the X Shared Memory extension is available. 192 * Return: 0 = not available 193 * 1 = shared XImage support available 194 * 2 = shared Pixmap support available also 195 */ 196#ifndef XFree86Server 197static int check_for_xshm( XMesaDisplay *display ) 198{ 199#ifdef USE_XSHM 200 int major, minor, ignore; 201 Bool pixmaps; 202 203 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 204 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 205 return (pixmaps==True) ? 2 : 1; 206 } 207 else { 208 return 0; 209 } 210 } 211 else { 212 return 0; 213 } 214#else 215 /* Can't compile XSHM support */ 216 return 0; 217#endif 218} 219#endif 220 221 222/* 223 * Return the width and height of the given drawable. 224 */ 225static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 226 unsigned int *width, unsigned int *height) 227{ 228#ifdef XFree86Server 229 (void) dpy; 230 *width = d->width; 231 *height = d->height; 232#else 233 Window root; 234 int x, y; 235 unsigned int bw, depth; 236 237 _glthread_LOCK_MUTEX(_xmesa_lock); 238 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 239 _glthread_UNLOCK_MUTEX(_xmesa_lock); 240#endif 241} 242 243 244/* 245 * Apply gamma correction to an intensity value in [0..max]. Return the 246 * new intensity value. 247 */ 248static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 249{ 250 if (gamma == 1.0) { 251 return value; 252 } 253 else { 254 double x = (double) value / (double) max; 255 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 256 } 257} 258 259 260 261/* 262 * Return the true number of bits per pixel for XImages. 263 * For example, if we request a 24-bit deep visual we may actually need/get 264 * 32bpp XImages. This function returns the appropriate bpp. 265 * Input: dpy - the X display 266 * visinfo - desribes the visual to be used for XImages 267 * Return: true number of bits per pixel for XImages 268 */ 269#ifdef XFree86Server 270 271static int bits_per_pixel( XMesaVisual xmv ) 272{ 273 XMesaVisualInfo visinfo = xmv->visinfo; 274 const int depth = visinfo->nplanes; 275 int i; 276 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 277 if (screenInfo.formats[i].depth == depth) 278 return screenInfo.formats[i].bitsPerPixel; 279 } 280 return depth; /* should never get here, but this should be safe */ 281} 282 283#else 284 285static int bits_per_pixel( XMesaVisual xmv ) 286{ 287 XMesaDisplay *dpy = xmv->display; 288 XMesaVisualInfo visinfo = xmv->visinfo; 289 XMesaImage *img; 290 int bitsPerPixel; 291 /* Create a temporary XImage */ 292 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 293 ZPixmap, 0, /*format, offset*/ 294 (char*) MALLOC(8), /*data*/ 295 1, 1, /*width, height*/ 296 32, /*bitmap_pad*/ 297 0 /*bytes_per_line*/ 298 ); 299 assert(img); 300 /* grab the bits/pixel value */ 301 bitsPerPixel = img->bits_per_pixel; 302 /* free the XImage */ 303 FREE( img->data ); 304 img->data = NULL; 305 XMesaDestroyImage( img ); 306 return bitsPerPixel; 307} 308#endif 309 310 311 312/* 313 * Determine if a given X window ID is valid (window exists). 314 * Do this by calling XGetWindowAttributes() for the window and 315 * checking if we catch an X error. 316 * Input: dpy - the display 317 * win - the window to check for existance 318 * Return: GL_TRUE - window exists 319 * GL_FALSE - window doesn't exist 320 */ 321#ifndef XFree86Server 322static GLboolean WindowExistsFlag; 323 324static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 325{ 326 (void) dpy; 327 if (xerr->error_code == BadWindow) { 328 WindowExistsFlag = GL_FALSE; 329 } 330 return 0; 331} 332 333static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 334{ 335 XWindowAttributes wa; 336 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 337 WindowExistsFlag = GL_TRUE; 338 old_handler = XSetErrorHandler(window_exists_err_handler); 339 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 340 XSetErrorHandler(old_handler); 341 return WindowExistsFlag; 342} 343#endif 344 345 346 347/**********************************************************************/ 348/***** Linked list of XMesaBuffers *****/ 349/**********************************************************************/ 350 351static XMesaBuffer XMesaBufferList = NULL; 352 353 354/* Allocate a new XMesaBuffer, add to linked list */ 355static XMesaBuffer alloc_xmesa_buffer(void) 356{ 357 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 358 if (b) { 359 b->Next = XMesaBufferList; 360 XMesaBufferList = b; 361 } 362 return b; 363} 364 365 366/* 367 * Find an XMesaBuffer by matching X display and colormap but NOT matching 368 * the notThis buffer. 369 */ 370static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 371 XMesaColormap cmap, 372 XMesaBuffer notThis) 373{ 374 XMesaBuffer b; 375 for (b=XMesaBufferList; b; b=b->Next) { 376 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 377 return b; 378 } 379 } 380 return NULL; 381} 382 383 384/* 385 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 386 * entries. 387 */ 388static void free_xmesa_buffer(int client, XMesaBuffer buffer) 389{ 390 XMesaBuffer prev = NULL, b; 391 (void) client; 392 for (b=XMesaBufferList; b; b=b->Next) { 393 if (b==buffer) { 394 /* unlink bufer from list */ 395 if (prev) 396 prev->Next = buffer->Next; 397 else 398 XMesaBufferList = buffer->Next; 399 /* Check to free X colors */ 400 if (buffer->num_alloced>0) { 401 /* If no other buffer uses this X colormap then free the colors. */ 402 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 403#ifdef XFree86Server 404 (void)FreeColors(buffer->cmap, client, 405 buffer->num_alloced, buffer->alloced_colors, 406 0); 407#else 408 XFreeColors(buffer->display, buffer->cmap, 409 buffer->alloced_colors, buffer->num_alloced, 0); 410#endif 411 } 412 } 413 414 _mesa_free_framebuffer_data(&buffer->mesa_buffer); 415 FREE(buffer); 416 417 return; 418 } 419 /* continue search */ 420 prev = b; 421 } 422 /* buffer not found in XMesaBufferList */ 423 _mesa_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 424} 425 426 427/* Copy X color table stuff from one XMesaBuffer to another. */ 428static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 429{ 430 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 431 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 432 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 433 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 434 dst->num_alloced = src->num_alloced; 435 MEMCPY(dst->alloced_colors, src->alloced_colors, 436 sizeof(src->alloced_colors)); 437} 438 439 440 441/**********************************************************************/ 442/***** Misc Private Functions *****/ 443/**********************************************************************/ 444 445 446/* 447 * Return number of bits set in n. 448 */ 449static int bitcount( unsigned long n ) 450{ 451 int bits; 452 for (bits=0; n>0; n=n>>1) { 453 if (n&1) { 454 bits++; 455 } 456 } 457 return bits; 458} 459 460 461 462/* 463 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 464 * Return: GL_TRUE if success, GL_FALSE if error 465 */ 466#ifndef XFree86Server 467static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 468{ 469#ifdef USE_XSHM 470 /* 471 * We have to do a _lot_ of error checking here to be sure we can 472 * really use the XSHM extension. It seems different servers trigger 473 * errors at different points if the extension won't work. Therefore 474 * we have to be very careful... 475 */ 476 GC gc; 477 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 478 479 b->backimage = XShmCreateImage( b->xm_visual->display, 480 b->xm_visual->visinfo->visual, 481 b->xm_visual->visinfo->depth, 482 ZPixmap, NULL, &b->shminfo, 483 b->width, b->height ); 484 if (b->backimage == NULL) { 485 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 486 b->shm = 0; 487 return GL_FALSE; 488 } 489 490 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 491 * b->backimage->height, IPC_CREAT|0777 ); 492 if (b->shminfo.shmid < 0) { 493 _mesa_warning(NULL, "shmget failed while allocating back buffer"); 494 XDestroyImage( b->backimage ); 495 b->backimage = NULL; 496 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmget), disabling."); 497 b->shm = 0; 498 return GL_FALSE; 499 } 500 501 b->shminfo.shmaddr = b->backimage->data 502 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 503 if (b->shminfo.shmaddr == (char *) -1) { 504 _mesa_warning(NULL, "shmat() failed while allocating back buffer"); 505 XDestroyImage( b->backimage ); 506 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 507 b->backimage = NULL; 508 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmat), disabling."); 509 b->shm = 0; 510 return GL_FALSE; 511 } 512 513 b->shminfo.readOnly = False; 514 mesaXErrorFlag = 0; 515 old_handler = XSetErrorHandler( mesaHandleXError ); 516 /* This may trigger the X protocol error we're ready to catch: */ 517 XShmAttach( b->xm_visual->display, &b->shminfo ); 518 XSync( b->xm_visual->display, False ); 519 520 if (mesaXErrorFlag) { 521 /* we are on a remote display, this error is normal, don't print it */ 522 XFlush( b->xm_visual->display ); 523 mesaXErrorFlag = 0; 524 XDestroyImage( b->backimage ); 525 shmdt( b->shminfo.shmaddr ); 526 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 527 b->backimage = NULL; 528 b->shm = 0; 529 (void) XSetErrorHandler( old_handler ); 530 return GL_FALSE; 531 } 532 533 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 534 535 /* Finally, try an XShmPutImage to be really sure the extension works */ 536 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 537 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 538 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 539 XSync( b->xm_visual->display, False ); 540 XFreeGC( b->xm_visual->display, gc ); 541 (void) XSetErrorHandler( old_handler ); 542 if (mesaXErrorFlag) { 543 XFlush( b->xm_visual->display ); 544 mesaXErrorFlag = 0; 545 XDestroyImage( b->backimage ); 546 shmdt( b->shminfo.shmaddr ); 547 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 548 b->backimage = NULL; 549 b->shm = 0; 550 return GL_FALSE; 551 } 552 553 if (b->backimage) { 554 int height = b->backimage->height; 555 /* Needed by PIXELADDR1 macro */ 556 b->ximage_width1 = b->backimage->bytes_per_line; 557 b->ximage_origin1 = (GLubyte *) b->backimage->data 558 + b->ximage_width1 * (height-1); 559 /* Needed by PIXELADDR2 macro */ 560 b->ximage_width2 = b->backimage->bytes_per_line / 2; 561 b->ximage_origin2 = (GLushort *) b->backimage->data 562 + b->ximage_width2 * (height-1); 563 /* Needed by PIXELADDR3 macro */ 564 b->ximage_width3 = b->backimage->bytes_per_line; 565 b->ximage_origin3 = (GLubyte *) b->backimage->data 566 + b->ximage_width3 * (height-1); 567 /* Needed by PIXELADDR4 macro */ 568 b->ximage_width4 = b->backimage->width; 569 b->ximage_origin4 = (GLuint *) b->backimage->data 570 + b->ximage_width4 * (height-1); 571 } 572 573 return GL_TRUE; 574#else 575 /* Can't compile XSHM support */ 576 return GL_FALSE; 577#endif 578} 579#endif 580 581 582 583/* 584 * Setup an off-screen pixmap or Ximage to use as the back buffer. 585 * Input: b - the X/Mesa buffer 586 */ 587void xmesa_alloc_back_buffer( XMesaBuffer b ) 588{ 589 if (b->db_state==BACK_XIMAGE) { 590 /* Deallocate the old backimage, if any */ 591 if (b->backimage) { 592#if defined(USE_XSHM) && !defined(XFree86Server) 593 if (b->shm) { 594 XShmDetach( b->xm_visual->display, &b->shminfo ); 595 XDestroyImage( b->backimage ); 596 shmdt( b->shminfo.shmaddr ); 597 } 598 else 599#endif 600 XMesaDestroyImage( b->backimage ); 601 b->backimage = NULL; 602 } 603 604 /* Allocate new back buffer */ 605#ifdef XFree86Server 606 { 607 /* Allocate a regular XImage for the back buffer. */ 608 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 609 b->width, b->height, NULL); 610#else 611 if (b->shm==0 || alloc_shm_back_buffer(b)==GL_FALSE) { 612 /* Allocate a regular XImage for the back buffer. */ 613 b->backimage = XCreateImage( b->xm_visual->display, 614 b->xm_visual->visinfo->visual, 615 GET_VISUAL_DEPTH(b->xm_visual), 616 ZPixmap, 0, /* format, offset */ 617 NULL, b->width, b->height, 618 8, 0 ); /* pad, bytes_per_line */ 619#endif 620 if (!b->backimage) { 621 _mesa_warning(NULL, "alloc_back_buffer: XCreateImage failed."); 622 } 623 b->backimage->data = (char *) MALLOC( b->backimage->height 624 * b->backimage->bytes_per_line ); 625 if (!b->backimage->data) { 626 _mesa_warning(NULL, "alloc_back_buffer: MALLOC failed."); 627 XMesaDestroyImage( b->backimage ); 628 b->backimage = NULL; 629 } 630 } 631 b->backpixmap = None; 632 } 633 else if (b->db_state==BACK_PIXMAP) { 634 XMesaPixmap old_pixmap = b->backpixmap; 635 /* Free the old back pixmap */ 636 if (b->backpixmap) { 637 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 638 } 639 /* Allocate new back pixmap */ 640 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 641 b->width, b->height, 642 GET_VISUAL_DEPTH(b->xm_visual) ); 643 b->backimage = NULL; 644 /* update other references to backpixmap */ 645 if (b->buffer==(XMesaDrawable)old_pixmap) { 646 b->buffer = (XMesaDrawable)b->backpixmap; 647 } 648 } 649} 650 651 652 653/* 654 * A replacement for XAllocColor. This function should never 655 * fail to allocate a color. When XAllocColor fails, we return 656 * the nearest matching color. If we have to allocate many colors 657 * this function isn't too efficient; the XQueryColors() could be 658 * done just once. 659 * Written by Michael Pichler, Brian Paul, Mark Kilgard 660 * Input: dpy - X display 661 * cmap - X colormap 662 * cmapSize - size of colormap 663 * In/Out: color - the XColor struct 664 * Output: exact - 1=exact color match, 0=closest match 665 * alloced - 1=XAlloc worked, 0=XAlloc failed 666 */ 667static void 668noFaultXAllocColor( int client, 669 XMesaDisplay *dpy, 670 XMesaColormap cmap, 671 int cmapSize, 672 XMesaColor *color, 673 int *exact, int *alloced ) 674{ 675#ifdef XFree86Server 676 Pixel *ppixIn; 677 xrgb *ctable; 678#else 679 /* we'll try to cache ctable for better remote display performance */ 680 static Display *prevDisplay = NULL; 681 static XMesaColormap prevCmap = 0; 682 static int prevCmapSize = 0; 683 static XMesaColor *ctable = NULL; 684#endif 685 XMesaColor subColor; 686 int i, bestmatch; 687 double mindist; /* 3*2^16^2 exceeds long int precision. */ 688 689 (void) client; 690 691 /* First try just using XAllocColor. */ 692#ifdef XFree86Server 693 if (AllocColor(cmap, 694 &color->red, &color->green, &color->blue, 695 &color->pixel, 696 client) == Success) { 697#else 698 if (XAllocColor(dpy, cmap, color)) { 699#endif 700 *exact = 1; 701 *alloced = 1; 702 return; 703 } 704 705 /* Alloc failed, search for closest match */ 706 707 /* Retrieve color table entries. */ 708 /* XXX alloca candidate. */ 709#ifdef XFree86Server 710 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 711 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 712 for (i = 0; i < cmapSize; i++) { 713 ppixIn[i] = i; 714 } 715 QueryColors(cmap, cmapSize, ppixIn, ctable); 716#else 717 if (prevDisplay != dpy || prevCmap != cmap 718 || prevCmapSize != cmapSize || !ctable) { 719 /* free previously cached color table */ 720 if (ctable) 721 FREE(ctable); 722 /* Get the color table from X */ 723 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 724 assert(ctable); 725 for (i = 0; i < cmapSize; i++) { 726 ctable[i].pixel = i; 727 } 728 XQueryColors(dpy, cmap, ctable, cmapSize); 729 prevDisplay = dpy; 730 prevCmap = cmap; 731 prevCmapSize = cmapSize; 732 } 733#endif 734 735 /* Find best match. */ 736 bestmatch = -1; 737 mindist = 0.0; 738 for (i = 0; i < cmapSize; i++) { 739 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 740 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 741 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 742 double dist = dr * dr + dg * dg + db * db; 743 if (bestmatch < 0 || dist < mindist) { 744 bestmatch = i; 745 mindist = dist; 746 } 747 } 748 749 /* Return result. */ 750 subColor.red = ctable[bestmatch].red; 751 subColor.green = ctable[bestmatch].green; 752 subColor.blue = ctable[bestmatch].blue; 753 /* Try to allocate the closest match color. This should only 754 * fail if the cell is read/write. Otherwise, we're incrementing 755 * the cell's reference count. 756 */ 757#ifdef XFree86Server 758 if (AllocColor(cmap, 759 &subColor.red, &subColor.green, &subColor.blue, 760 &subColor.pixel, 761 client) == Success) { 762#else 763 if (XAllocColor(dpy, cmap, &subColor)) { 764#endif 765 *alloced = 1; 766 } 767 else { 768 /* do this to work around a problem reported by Frank Ortega */ 769 subColor.pixel = (unsigned long) bestmatch; 770 subColor.red = ctable[bestmatch].red; 771 subColor.green = ctable[bestmatch].green; 772 subColor.blue = ctable[bestmatch].blue; 773 subColor.flags = DoRed | DoGreen | DoBlue; 774 *alloced = 0; 775 } 776#ifdef XFree86Server 777 FREE(ppixIn); 778 FREE(ctable); 779#else 780 /* don't free table, save it for next time */ 781#endif 782 783 *color = subColor; 784 *exact = 0; 785} 786 787 788 789 790/* 791 * Do setup for PF_GRAYSCALE pixel format. 792 * Note that buffer may be NULL. 793 */ 794static GLboolean setup_grayscale( int client, XMesaVisual v, 795 XMesaBuffer buffer, XMesaColormap cmap ) 796{ 797 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 798 return GL_FALSE; 799 } 800 801 if (buffer) { 802 XMesaBuffer prevBuffer; 803 804 if (!cmap) { 805 return GL_FALSE; 806 } 807 808 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 809 if (prevBuffer && 810 (buffer->xm_visual->mesa_visual.rgbMode == 811 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 812 /* Copy colormap stuff from previous XMesaBuffer which uses same 813 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 814 */ 815 copy_colortable_info(buffer, prevBuffer); 816 } 817 else { 818 /* Allocate 256 shades of gray */ 819 int gray; 820 int colorsfailed = 0; 821 for (gray=0;gray<256;gray++) { 822 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 823 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 824 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 825 int exact, alloced; 826 XMesaColor xcol; 827 xcol.red = (r << 8) | r; 828 xcol.green = (g << 8) | g; 829 xcol.blue = (b << 8) | b; 830 noFaultXAllocColor( client, v->display, 831 cmap, GET_COLORMAP_SIZE(v), 832 &xcol, &exact, &alloced ); 833 if (!exact) { 834 colorsfailed++; 835 } 836 if (alloced) { 837 assert(buffer->num_alloced<256); 838 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 839 buffer->num_alloced++; 840 } 841 842 /*OLD 843 assert(gray < 576); 844 buffer->color_table[gray*3+0] = xcol.pixel; 845 buffer->color_table[gray*3+1] = xcol.pixel; 846 buffer->color_table[gray*3+2] = xcol.pixel; 847 assert(xcol.pixel < 65536); 848 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 849 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 850 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 851 */ 852 buffer->color_table[gray] = xcol.pixel; 853 assert(xcol.pixel < 65536); 854 buffer->pixel_to_r[xcol.pixel] = gray; 855 buffer->pixel_to_g[xcol.pixel] = gray; 856 buffer->pixel_to_b[xcol.pixel] = gray; 857 } 858 859 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 860 _mesa_warning(NULL, 861 "Note: %d out of 256 needed colors do not match exactly.\n", 862 colorsfailed ); 863 } 864 } 865 } 866 867 v->dithered_pf = PF_Grayscale; 868 v->undithered_pf = PF_Grayscale; 869 return GL_TRUE; 870} 871 872 873 874/* 875 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 876 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 877 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 878 * color. While this function was originally designed just for 8-bit 879 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 880 * Dithering code contributed by Bob Mercier. 881 */ 882static GLboolean setup_dithered_color( int client, XMesaVisual v, 883 XMesaBuffer buffer, XMesaColormap cmap ) 884{ 885 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 886 return GL_FALSE; 887 } 888 889 if (buffer) { 890 XMesaBuffer prevBuffer; 891 892 if (!cmap) { 893 return GL_FALSE; 894 } 895 896 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 897 if (prevBuffer && 898 (buffer->xm_visual->mesa_visual.rgbMode == 899 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 900 /* Copy colormap stuff from previous, matching XMesaBuffer. 901 * Do this to avoid time spent in noFaultXAllocColor. 902 */ 903 copy_colortable_info(buffer, prevBuffer); 904 } 905 else { 906 /* Allocate X colors and initialize color_table[], red_table[], etc */ 907 int r, g, b, i; 908 int colorsfailed = 0; 909 for (r = 0; r < DITH_R; r++) { 910 for (g = 0; g < DITH_G; g++) { 911 for (b = 0; b < DITH_B; b++) { 912 XMesaColor xcol; 913 int exact, alloced; 914 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 915 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 916 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 917 noFaultXAllocColor( client, v->display, 918 cmap, GET_COLORMAP_SIZE(v), 919 &xcol, &exact, &alloced ); 920 if (!exact) { 921 colorsfailed++; 922 } 923 if (alloced) { 924 assert(buffer->num_alloced<256); 925 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 926 buffer->num_alloced++; 927 } 928 i = DITH_MIX( r, g, b ); 929 assert(i < 576); 930 buffer->color_table[i] = xcol.pixel; 931 assert(xcol.pixel < 65536); 932 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 933 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 934 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 935 } 936 } 937 } 938 939 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 940 _mesa_warning(NULL, 941 "Note: %d out of %d needed colors do not match exactly.\n", 942 colorsfailed, DITH_R * DITH_G * DITH_B ); 943 } 944 } 945 } 946 947 v->dithered_pf = PF_Dither; 948 v->undithered_pf = PF_Lookup; 949 return GL_TRUE; 950} 951 952 953/* 954 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 955 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 956 * Special dithering tables have to be initialized. 957 */ 958static void setup_8bit_hpcr( XMesaVisual v ) 959{ 960 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 961 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 962 * on the root window AND the colormap obtainable by XGetRGBColormaps 963 * for that atom must be set on the window. (see also tkInitWindow) 964 * If that colormap is not set, the output will look stripy. 965 */ 966 967 /* Setup color tables with gamma correction */ 968 int i; 969 double g; 970 971 g = 1.0 / v->RedGamma; 972 for (i=0; i<256; i++) { 973 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 974 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 975 } 976 977 g = 1.0 / v->GreenGamma; 978 for (i=0; i<256; i++) { 979 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 980 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 981 } 982 983 g = 1.0 / v->BlueGamma; 984 for (i=0; i<256; i++) { 985 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 986 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 987 } 988 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 989 v->dithered_pf = PF_HPCR; 990 991 /* which method should I use to clear */ 992 /* GL_FALSE: keep the ordinary method */ 993 /* GL_TRUE : clear with dither pattern */ 994 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 995 996 if (v->hpcr_clear_flag) { 997 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 998 DefaultRootWindow(v->display), 999 16, 2, 8); 1000#ifndef XFree86Server 1001 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1002 0, 0, 16, 2, AllPlanes, ZPixmap); 1003#endif 1004 } 1005} 1006 1007 1008/* 1009 * Setup RGB rendering for a window with a True/DirectColor visual. 1010 */ 1011static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1012 XMesaColormap cmap ) 1013{ 1014 unsigned long rmask, gmask, bmask; 1015 (void) buffer; 1016 (void) cmap; 1017 1018 /* Compute red multiplier (mask) and bit shift */ 1019 v->rshift = 0; 1020 rmask = GET_REDMASK(v); 1021 while ((rmask & 1)==0) { 1022 v->rshift++; 1023 rmask = rmask >> 1; 1024 } 1025 1026 /* Compute green multiplier (mask) and bit shift */ 1027 v->gshift = 0; 1028 gmask = GET_GREENMASK(v); 1029 while ((gmask & 1)==0) { 1030 v->gshift++; 1031 gmask = gmask >> 1; 1032 } 1033 1034 /* Compute blue multiplier (mask) and bit shift */ 1035 v->bshift = 0; 1036 bmask = GET_BLUEMASK(v); 1037 while ((bmask & 1)==0) { 1038 v->bshift++; 1039 bmask = bmask >> 1; 1040 } 1041 1042 /* 1043 * Compute component-to-pixel lookup tables and dithering kernel 1044 */ 1045 { 1046 static GLubyte kernel[16] = { 1047 0*16, 8*16, 2*16, 10*16, 1048 12*16, 4*16, 14*16, 6*16, 1049 3*16, 11*16, 1*16, 9*16, 1050 15*16, 7*16, 13*16, 5*16, 1051 }; 1052 GLint rBits = bitcount(rmask); 1053 GLint gBits = bitcount(gmask); 1054 GLint bBits = bitcount(bmask); 1055 GLint maxBits; 1056 GLuint i; 1057 1058 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1059 for (i=0; i<=rmask; i++) 1060 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1061 for (i=0; i<=gmask; i++) 1062 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1063 for (i=0; i<=bmask; i++) 1064 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1065 1066 /* convert RGB values from [0,255] to pixel components */ 1067 1068 for (i=0;i<256;i++) { 1069 GLint r = gamma_adjust(v->RedGamma, i, 255); 1070 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1071 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1072 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1073 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1074 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1075 } 1076 /* overflow protection */ 1077 for (i=256;i<512;i++) { 1078 v->RtoPixel[i] = v->RtoPixel[255]; 1079 v->GtoPixel[i] = v->GtoPixel[255]; 1080 v->BtoPixel[i] = v->BtoPixel[255]; 1081 } 1082 1083 /* setup dithering kernel */ 1084 maxBits = rBits; 1085 if (gBits > maxBits) maxBits = gBits; 1086 if (bBits > maxBits) maxBits = bBits; 1087 for (i=0;i<16;i++) { 1088 v->Kernel[i] = kernel[i] >> maxBits; 1089 } 1090 1091 v->undithered_pf = PF_Truecolor; 1092 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 1093 } 1094 1095 /* 1096 * Now check for TrueColor visuals which we can optimize. 1097 */ 1098 if ( GET_REDMASK(v) ==0x0000ff 1099 && GET_GREENMASK(v)==0x00ff00 1100 && GET_BLUEMASK(v) ==0xff0000 1101 && CHECK_BYTE_ORDER(v) 1102 && v->BitsPerPixel==32 1103 && sizeof(GLuint)==4 1104 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1105 /* common 32 bpp config used on SGI, Sun */ 1106 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1107 } 1108 else if (GET_REDMASK(v) ==0xff0000 1109 && GET_GREENMASK(v)==0x00ff00 1110 && GET_BLUEMASK(v) ==0x0000ff 1111 && CHECK_BYTE_ORDER(v) 1112 && v->BitsPerPixel==32 1113 && sizeof(GLuint)==4 1114 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1115 /* common 32 bpp config used on Linux, HP, IBM */ 1116 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1117 } 1118 else if (GET_REDMASK(v) ==0xff0000 1119 && GET_GREENMASK(v)==0x00ff00 1120 && GET_BLUEMASK(v) ==0x0000ff 1121 && CHECK_BYTE_ORDER(v) 1122 && v->BitsPerPixel==24 1123 && sizeof(GLuint)==4 1124 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1125 /* common packed 24 bpp config used on Linux */ 1126 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1127 } 1128 else if (GET_REDMASK(v) ==0xf800 1129 && GET_GREENMASK(v)==0x07e0 1130 && GET_BLUEMASK(v) ==0x001f 1131 && CHECK_BYTE_ORDER(v) 1132 && v->BitsPerPixel==16 1133 && sizeof(GLushort)==2 1134 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1135 /* 5-6-5 color weight on common PC VGA boards */ 1136 v->undithered_pf = PF_5R6G5B; 1137 v->dithered_pf = PF_Dither_5R6G5B; 1138 } 1139 else if (GET_REDMASK(v) ==0xe0 1140 && GET_GREENMASK(v)==0x1c 1141 && GET_BLUEMASK(v) ==0x03 1142 && CHECK_FOR_HPCR(v)) { 1143 setup_8bit_hpcr( v ); 1144 } 1145} 1146 1147 1148 1149/* 1150 * Setup RGB rendering for a window with a monochrome visual. 1151 */ 1152static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1153{ 1154 (void) b; 1155 v->dithered_pf = v->undithered_pf = PF_1Bit; 1156 /* if black=1 then we must flip pixel values */ 1157 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1158} 1159 1160 1161 1162/* 1163 * When a context is "made current" for the first time, we can finally 1164 * finish initializing the context's visual and buffer information. 1165 * Input: v - the XMesaVisual to initialize 1166 * b - the XMesaBuffer to initialize (may be NULL) 1167 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1168 * window - the window/pixmap we're rendering into 1169 * cmap - the colormap associated with the window/pixmap 1170 * Return: GL_TRUE=success, GL_FALSE=failure 1171 */ 1172static GLboolean initialize_visual_and_buffer( int client, 1173 XMesaVisual v, 1174 XMesaBuffer b, 1175 GLboolean rgb_flag, 1176 XMesaDrawable window, 1177 XMesaColormap cmap ) 1178{ 1179#ifndef XFree86Server 1180 XGCValues gcvalues; 1181#endif 1182 1183 if (b) { 1184 assert(b->xm_visual == v); 1185 } 1186 1187 /* Save true bits/pixel */ 1188 v->BitsPerPixel = bits_per_pixel(v); 1189 assert(v->BitsPerPixel > 0); 1190 1191 1192 if (rgb_flag==GL_FALSE) { 1193 /* COLOR-INDEXED WINDOW: 1194 * Even if the visual is TrueColor or DirectColor we treat it as 1195 * being color indexed. This is weird but might be useful to someone. 1196 */ 1197 v->dithered_pf = v->undithered_pf = PF_Index; 1198 v->index_bits = GET_VISUAL_DEPTH(v); 1199 } 1200 else { 1201 /* RGB WINDOW: 1202 * We support RGB rendering into almost any kind of visual. 1203 */ 1204 int xclass; 1205 xclass = GET_VISUAL_CLASS(v); 1206 if (xclass==TrueColor || xclass==DirectColor) { 1207 setup_truecolor( v, b, cmap ); 1208 } 1209 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { 1210 setup_monochrome( v, b ); 1211 } 1212 else if (xclass==GrayScale || xclass==StaticGray) { 1213 if (!setup_grayscale( client, v, b, cmap )) { 1214 return GL_FALSE; 1215 } 1216 } 1217 else if ((xclass==PseudoColor || xclass==StaticColor) 1218 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1219 if (!setup_dithered_color( client, v, b, cmap )) { 1220 return GL_FALSE; 1221 } 1222 } 1223 else { 1224 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual."); 1225 return GL_FALSE; 1226 } 1227 v->index_bits = 0; 1228 1229 if (_mesa_getenv("MESA_NO_DITHER")) { 1230 v->dithered_pf = v->undithered_pf; 1231 } 1232 } 1233 1234 1235 /* 1236 * If MESA_INFO env var is set print out some debugging info 1237 * which can help Brian figure out what's going on when a user 1238 * reports bugs. 1239 */ 1240 if (_mesa_getenv("MESA_INFO")) { 1241 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1242 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1243 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1244 _mesa_printf("X/Mesa level = %d\n", v->level); 1245 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1246 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1247 } 1248 1249 if (b && window) { 1250 /* Do window-specific initializations */ 1251 1252 /* Window dimensions */ 1253 unsigned int w, h; 1254 get_drawable_size( v->display, window, &w, &h ); 1255 b->width = w; 1256 b->height = h; 1257 1258 b->frontbuffer = window; 1259 1260 /* Setup for single/double buffering */ 1261 if (v->mesa_visual.doubleBufferMode) { 1262 /* Double buffered */ 1263#ifndef XFree86Server 1264 b->shm = check_for_xshm( v->display ); 1265#endif 1266 xmesa_alloc_back_buffer( b ); 1267 if (b->db_state==BACK_PIXMAP) { 1268 b->buffer = (XMesaDrawable)b->backpixmap; 1269 } 1270 else { 1271 b->buffer = XIMAGE; 1272 } 1273 } 1274 else { 1275 /* Single Buffered */ 1276 b->buffer = b->frontbuffer; 1277 } 1278 1279 /* X11 graphics contexts */ 1280#ifdef XFree86Server 1281 b->gc = CreateScratchGC(v->display, window->depth); 1282#else 1283 b->gc = XCreateGC( v->display, window, 0, NULL ); 1284#endif 1285 XMesaSetFunction( v->display, b->gc, GXcopy ); 1286 1287 /* cleargc - for glClear() */ 1288#ifdef XFree86Server 1289 b->cleargc = CreateScratchGC(v->display, window->depth); 1290#else 1291 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1292#endif 1293 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1294 1295 /* 1296 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1297 * Patch contributed by Michael Pichler May 15, 1995. 1298 */ 1299#ifdef XFree86Server 1300 b->swapgc = CreateScratchGC(v->display, window->depth); 1301 { 1302 CARD32 v[1]; 1303 v[0] = FALSE; 1304 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1305 } 1306#else 1307 gcvalues.graphics_exposures = False; 1308 b->swapgc = XCreateGC( v->display, window, 1309 GCGraphicsExposures, &gcvalues); 1310#endif 1311 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1312 /* 1313 * Set fill style and tile pixmap once for all for HPCR stuff 1314 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1315 * Initialize whole stuff 1316 * Patch contributed by Jacques Leroy March 8, 1998. 1317 */ 1318 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1319 int i; 1320 for (i=0; i<16; i++) 1321 { 1322 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1323 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1324 } 1325 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1326 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1327 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1328 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1329 } 1330 1331 /* Initialize the row buffer XImage for use in write_color_span() */ 1332#ifdef XFree86Server 1333 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1334 (char *)MALLOC(MAX_WIDTH*4)); 1335#else 1336 b->rowimage = XCreateImage( v->display, 1337 v->visinfo->visual, 1338 v->visinfo->depth, 1339 ZPixmap, 0, /*format, offset*/ 1340 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1341 MAX_WIDTH, 1, /*width, height*/ 1342 32, /*bitmap_pad*/ 1343 0 /*bytes_per_line*/ ); 1344#endif 1345 } 1346 1347 return GL_TRUE; 1348} 1349 1350 1351 1352/* 1353 * Convert an RGBA color to a pixel value. 1354 */ 1355unsigned long 1356xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1357 GLuint pixelFormat) 1358{ 1359 switch (pixelFormat) { 1360 case PF_Index: 1361 return 0; 1362 case PF_Truecolor: 1363 { 1364 unsigned long p; 1365 PACK_TRUECOLOR( p, r, g, b ); 1366 return p; 1367 } 1368 case PF_8A8B8G8R: 1369 return PACK_8A8B8G8R( r, g, b, a ); 1370 case PF_8R8G8B: 1371 /* fall through */ 1372 case PF_8R8G8B24: 1373 return PACK_8R8G8B( r, g, b ); 1374 case PF_5R6G5B: 1375 return PACK_5R6G5B( r, g, b ); 1376 case PF_Dither: 1377 { 1378 DITHER_SETUP; 1379 return DITHER( 1, 0, r, g, b ); 1380 } 1381 case PF_1Bit: 1382 /* 382 = (3*255)/2 */ 1383 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1384 case PF_HPCR: 1385 return DITHER_HPCR(1, 1, r, g, b); 1386 case PF_Lookup: 1387 { 1388 LOOKUP_SETUP; 1389 return LOOKUP( r, g, b ); 1390 } 1391 case PF_Grayscale: 1392 return GRAY_RGB( r, g, b ); 1393 case PF_Dither_True: 1394 /* fall through */ 1395 case PF_Dither_5R6G5B: 1396 { 1397 unsigned long p; 1398 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1399 return p; 1400 } 1401 default: 1402 _mesa_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1403 } 1404 return 0; 1405} 1406 1407 1408/**********************************************************************/ 1409/***** Public Functions *****/ 1410/**********************************************************************/ 1411 1412 1413/* 1414 * Create a new X/Mesa visual. 1415 * Input: display - X11 display 1416 * visinfo - an XVisualInfo pointer 1417 * rgb_flag - GL_TRUE = RGB mode, 1418 * GL_FALSE = color index mode 1419 * alpha_flag - alpha buffer requested? 1420 * db_flag - GL_TRUE = double-buffered, 1421 * GL_FALSE = single buffered 1422 * stereo_flag - stereo visual? 1423 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1424 * GL_FALSE = use an off-screen pixmap for back buffer 1425 * depth_size - requested bits/depth values, or zero 1426 * stencil_size - requested bits/stencil values, or zero 1427 * accum_red_size - requested bits/red accum values, or zero 1428 * accum_green_size - requested bits/green accum values, or zero 1429 * accum_blue_size - requested bits/blue accum values, or zero 1430 * accum_alpha_size - requested bits/alpha accum values, or zero 1431 * num_samples - number of samples/pixel if multisampling, or zero 1432 * level - visual level, usually 0 1433 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT 1434 * Return; a new XMesaVisual or 0 if error. 1435 */ 1436XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1437 XMesaVisualInfo visinfo, 1438 GLboolean rgb_flag, 1439 GLboolean alpha_flag, 1440 GLboolean db_flag, 1441 GLboolean stereo_flag, 1442 GLboolean ximage_flag, 1443 GLint depth_size, 1444 GLint stencil_size, 1445 GLint accum_red_size, 1446 GLint accum_green_size, 1447 GLint accum_blue_size, 1448 GLint accum_alpha_size, 1449 GLint num_samples, 1450 GLint level, 1451 GLint visualCaveat ) 1452{ 1453 char *gamma; 1454 XMesaVisual v; 1455 GLint red_bits, green_bits, blue_bits, alpha_bits; 1456 1457 /* For debugging only */ 1458 if (_mesa_getenv("MESA_XSYNC")) { 1459 /* This makes debugging X easier. 1460 * In your debugger, set a breakpoint on _XError to stop when an 1461 * X protocol error is generated. 1462 */ 1463#ifdef XFree86Server 1464 /* NOT_NEEDED */ 1465#else 1466 XSynchronize( display, 1 ); 1467#endif 1468 } 1469 1470 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1471 if (!v) { 1472 return NULL; 1473 } 1474 1475 /* 1476 * In the X server, NULL is passed in for the display. It will have 1477 * to be set before using this visual. See XMesaSetVisualDisplay() 1478 * below. 1479 */ 1480 v->display = display; 1481 1482 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1483 * the struct but we may need some of the information contained in it 1484 * at a later time. 1485 */ 1486#ifdef XFree86Server 1487 v->visinfo = visinfo; 1488#else 1489 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1490 if(!v->visinfo) { 1491 FREE(v); 1492 return NULL; 1493 } 1494 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1495#endif 1496 1497#ifdef XFree86Server 1498 /* Initialize the depth of the screen */ 1499 { 1500 PixmapFormatRec *format; 1501 1502 for (format = screenInfo.formats; 1503 format->depth != display->rootDepth; 1504 format++) 1505 ; 1506 v->screen_depth = format->bitsPerPixel; 1507 } 1508#endif 1509 1510 /* check for MESA_GAMMA environment variable */ 1511 gamma = _mesa_getenv("MESA_GAMMA"); 1512 if (gamma) { 1513 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1514 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1515 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1516 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1517 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1518 } 1519 else { 1520 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1521 } 1522 1523 v->ximage_flag = ximage_flag; 1524 v->level = level; 1525 v->VisualCaveat = visualCaveat; 1526 1527 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1528 1529 { 1530 int xclass; 1531 xclass = GET_VISUAL_CLASS(v); 1532 if (xclass==TrueColor || xclass==DirectColor) { 1533 red_bits = bitcount(GET_REDMASK(v)); 1534 green_bits = bitcount(GET_GREENMASK(v)); 1535 blue_bits = bitcount(GET_BLUEMASK(v)); 1536 alpha_bits = 0; 1537 } 1538 else { 1539 /* this is an approximation */ 1540 int depth; 1541 depth = GET_VISUAL_DEPTH(v); 1542 red_bits = depth / 3; 1543 depth -= red_bits; 1544 green_bits = depth / 2; 1545 depth -= green_bits; 1546 blue_bits = depth; 1547 alpha_bits = 0; 1548 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1549 } 1550 } 1551 1552 if (alpha_flag && alpha_bits == 0) 1553 alpha_bits = 8; 1554 1555 _mesa_initialize_visual( &v->mesa_visual, 1556 rgb_flag, db_flag, stereo_flag, 1557 red_bits, green_bits, 1558 blue_bits, alpha_bits, 1559 v->index_bits, 1560 depth_size, 1561 stencil_size, 1562 accum_red_size, accum_green_size, 1563 accum_blue_size, accum_alpha_size, 1564 0 ); 1565 return v; 1566} 1567 1568 1569void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1570{ 1571 v->display = dpy; 1572} 1573 1574 1575void XMesaDestroyVisual( XMesaVisual v ) 1576{ 1577#ifndef XFree86Server 1578 FREE(v->visinfo); 1579#endif 1580 FREE(v); 1581} 1582 1583 1584 1585/* 1586 * Create a new XMesaContext. 1587 * Input: v - XMesaVisual 1588 * share_list - another XMesaContext with which to share display 1589 * lists or NULL if no sharing is wanted. 1590 * Return: an XMesaContext or NULL if error. 1591 */ 1592XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1593{ 1594 static GLboolean firstTime = GL_TRUE; 1595 XMesaContext c; 1596 GLboolean direct = GL_TRUE; /* not really */ 1597 GLcontext *mesaCtx; 1598 1599 if (firstTime) { 1600 _glthread_INIT_MUTEX(_xmesa_lock); 1601 firstTime = GL_FALSE; 1602 } 1603 1604 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1605 if (!c) { 1606 return NULL; 1607 } 1608 1609 mesaCtx = &(c->mesa); 1610 1611 /* Setup these pointers here since they're using for making the default 1612 * and proxy texture objects. Actually, we don't really need to do 1613 * this since we're using the default fallback functions which 1614 * _mesa_initialize_context() would plug in if needed. 1615 */ 1616 mesaCtx->Driver.NewTextureObject = _mesa_new_texture_object; 1617 mesaCtx->Driver.DeleteTexture = _mesa_delete_texture_object; 1618 1619 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1620 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1621 (void *) c, direct)) { 1622 FREE(c); 1623 return NULL; 1624 } 1625 1626 _mesa_enable_sw_extensions(mesaCtx); 1627 _mesa_enable_1_3_extensions(mesaCtx); 1628 _mesa_enable_1_4_extensions(mesaCtx); 1629 _mesa_enable_1_5_extensions(mesaCtx); 1630 1631 if (CHECK_BYTE_ORDER(v)) { 1632 c->swapbytes = GL_FALSE; 1633 } 1634 else { 1635 c->swapbytes = GL_TRUE; 1636 } 1637 1638 c->xm_visual = v; 1639 c->xm_draw_buffer = NULL; /* set later by XMesaMakeCurrent */ 1640 c->xm_read_buffer = NULL; /* set later by XMesaMakeCurrent */ 1641 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1642 c->display = v->display; 1643 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1644 1645 mesaCtx->Driver.UpdateState = xmesa_update_state; 1646 1647 /* Initialize the software rasterizer and helper modules. 1648 */ 1649 _swrast_CreateContext( mesaCtx ); 1650 _ac_CreateContext( mesaCtx ); 1651 _tnl_CreateContext( mesaCtx ); 1652 _swsetup_CreateContext( mesaCtx ); 1653 1654 xmesa_register_swrast_functions( mesaCtx ); 1655 1656 /* Set up some constant pointers: 1657 */ 1658 xmesa_init_pointers( mesaCtx ); 1659 1660 return c; 1661} 1662 1663 1664 1665 1666void XMesaDestroyContext( XMesaContext c ) 1667{ 1668 GLcontext *mesaCtx = &c->mesa; 1669#ifdef FX 1670 if (c->xm_draw_buffer && c->xm_buffer->FXctx) 1671 fxMesaDestroyContext(c->xm_draw_buffer->FXctx); 1672#endif 1673 _swsetup_DestroyContext( mesaCtx ); 1674 _swrast_DestroyContext( mesaCtx ); 1675 _tnl_DestroyContext( mesaCtx ); 1676 _ac_DestroyContext( mesaCtx ); 1677 _mesa_free_context_data( mesaCtx ); 1678 _mesa_free( c ); 1679} 1680 1681 1682 1683/* 1684 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1685 * Create a new XMesaBuffer from an X window. 1686 * Input: v - the XMesaVisual 1687 * w - the window 1688 * c - the context 1689 * Return: new XMesaBuffer or NULL if error 1690 */ 1691XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1692 XMesaContext c ) 1693{ 1694#ifndef XFree86Server 1695 XWindowAttributes attr; 1696#endif 1697#ifdef FX 1698 char *fxEnvVar; 1699#endif 1700 int client = 0; 1701 1702 XMesaBuffer b = alloc_xmesa_buffer(); 1703 if (!b) { 1704 return NULL; 1705 } 1706 1707 (void) c; 1708 1709#ifdef XFree86Server 1710 client = CLIENT_ID(((XMesaDrawable)w)->id); 1711#endif 1712 1713 assert(v); 1714 1715#ifdef XFree86Server 1716 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1717#else 1718 XGetWindowAttributes( v->display, w, &attr ); 1719 1720 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1721#endif 1722 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1723 return NULL; 1724 } 1725 1726 b->xm_visual = v; 1727 b->type = WINDOW; 1728 b->display = v->display; 1729#ifdef XFree86Server 1730 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1731#else 1732 if (attr.colormap) { 1733 b->cmap = attr.colormap; 1734 } 1735 else { 1736 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1737 /* this is weird, a window w/out a colormap!? */ 1738 /* OK, let's just allocate a new one and hope for the best */ 1739 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1740 } 1741#endif 1742 1743 /* determine back buffer implementation */ 1744 if (v->mesa_visual.doubleBufferMode) { 1745 if (v->ximage_flag) { 1746 b->db_state = BACK_XIMAGE; 1747 } 1748 else { 1749 b->db_state = BACK_PIXMAP; 1750 } 1751 } 1752 else { 1753 b->db_state = 0; 1754 } 1755 1756 _mesa_initialize_framebuffer(&b->mesa_buffer, 1757 &v->mesa_visual, 1758 v->mesa_visual.depthBits > 0, 1759 v->mesa_visual.stencilBits > 0, 1760 v->mesa_visual.accumRedBits > 0, 1761 v->mesa_visual.alphaBits > 0 ); 1762 1763 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1764 (XMesaDrawable)w, b->cmap )) { 1765 free_xmesa_buffer(client, b); 1766 return NULL; 1767 } 1768 1769#ifdef FX 1770 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1771 if (fxEnvVar) { 1772 if (fxEnvVar[0]!='d') { 1773 int attribs[100]; 1774 int numAttribs = 0; 1775 int hw; 1776 if (v->mesa_visual.depthBits > 0) { 1777 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1778 attribs[numAttribs++] = v->mesa_visual.depthBits; 1779 } 1780 if (v->mesa_visual.doubleBufferMode) { 1781 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1782 } 1783 if (v->mesa_visual.accumRedBits > 0) { 1784 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1785 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1786 } 1787 if (v->mesa_visual.stencilBits > 0) { 1788 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1789 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1790 } 1791 if (v->mesa_visual.alphaBits > 0) { 1792 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1793 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1794 } 1795 if (1) { 1796 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1797 attribs[numAttribs++] = (int) &(c->mesa); 1798 } 1799 attribs[numAttribs++] = FXMESA_NONE; 1800 1801 /* [dBorca] need to revise this ASAP!!! */ 1802 /*if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) { 1803 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1804 if ((v->undithered_pf!=PF_Index) && (b->backimage)) { 1805 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1806 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1807 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1808 else 1809 b->FXwindowHack = GL_FALSE; 1810 } 1811 } 1812 else */{ 1813 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1814 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1815 GR_REFRESH_75Hz, attribs); 1816 else 1817 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1818 b->FXisHackUsable = GL_FALSE; 1819 b->FXwindowHack = GL_FALSE; 1820 } 1821 /* 1822 fprintf(stderr, 1823 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1824 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1825 */ 1826 } 1827 } 1828 else { 1829 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1830 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1831 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1832 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1833 } 1834#endif 1835 1836 return b; 1837} 1838 1839 1840XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1841{ 1842 return XMesaCreateWindowBuffer2( v, w, NULL ); 1843} 1844 1845 1846/* 1847 * Create a new XMesaBuffer from an X pixmap. 1848 * Input: v - the XMesaVisual 1849 * p - the pixmap 1850 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor 1851 * visual for the pixmap 1852 * Return: new XMesaBuffer or NULL if error 1853 */ 1854XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1855 XMesaPixmap p, XMesaColormap cmap ) 1856{ 1857 int client = 0; 1858 XMesaBuffer b = alloc_xmesa_buffer(); 1859 if (!b) { 1860 return NULL; 1861 } 1862 1863 1864#ifdef XFree86Server 1865 client = CLIENT_ID(((XMesaDrawable)p)->id); 1866#endif 1867 1868 assert(v); 1869 1870 b->xm_visual = v; 1871 b->type = PIXMAP; 1872 b->display = v->display; 1873 b->cmap = cmap; 1874 1875 /* determine back buffer implementation */ 1876 if (v->mesa_visual.doubleBufferMode) { 1877 if (v->ximage_flag) { 1878 b->db_state = BACK_XIMAGE; 1879 } 1880 else { 1881 b->db_state = BACK_PIXMAP; 1882 } 1883 } 1884 else { 1885 b->db_state = 0; 1886 } 1887 1888 _mesa_initialize_framebuffer(&b->mesa_buffer, 1889 &v->mesa_visual, 1890 v->mesa_visual.depthBits > 0, 1891 v->mesa_visual.stencilBits > 0, 1892 v->mesa_visual.accumRedBits + 1893 v->mesa_visual.accumGreenBits + 1894 v->mesa_visual.accumBlueBits > 0, 1895 v->mesa_visual.alphaBits > 0 ); 1896 1897 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1898 (XMesaDrawable)p, cmap)) { 1899 free_xmesa_buffer(client, b); 1900 return NULL; 1901 } 1902 1903 return b; 1904} 1905 1906 1907 1908XMesaBuffer XMesaCreatePBuffer( XMesaVisual v, XMesaColormap cmap, 1909 unsigned int width, unsigned int height ) 1910{ 1911#ifdef XFree86Server 1912 return 0; 1913#else 1914 int client = 0; 1915 XMesaWindow root; 1916 XMesaDrawable drawable; /* X Pixmap Drawable */ 1917 XMesaBuffer b = alloc_xmesa_buffer(); 1918 if (!b) { 1919 return NULL; 1920 } 1921 1922 b->xm_visual = v; 1923 b->type = PBUFFER; 1924 b->display = v->display; 1925 b->cmap = cmap; 1926 1927 /* allocate pixmap for front buffer */ 1928 root = RootWindow( v->display, v->visinfo->screen ); 1929 drawable = XCreatePixmap( v->display, root, width, height, v->visinfo->depth ); 1930 1931 /* determine back buffer implementation */ 1932 if (v->mesa_visual.doubleBufferMode) { 1933 if (v->ximage_flag) { 1934 b->db_state = BACK_XIMAGE; 1935 } 1936 else { 1937 b->db_state = BACK_PIXMAP; 1938 } 1939 } 1940 else { 1941 b->db_state = 0; 1942 } 1943 1944 _mesa_initialize_framebuffer(&b->mesa_buffer, 1945 &v->mesa_visual, 1946 v->mesa_visual.depthBits > 0, 1947 v->mesa_visual.stencilBits > 0, 1948 v->mesa_visual.accumRedBits + 1949 v->mesa_visual.accumGreenBits + 1950 v->mesa_visual.accumBlueBits > 0, 1951 v->mesa_visual.alphaBits > 0 ); 1952 1953 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1954 drawable, cmap)) { 1955 free_xmesa_buffer(client, b); 1956 return NULL; 1957 } 1958 1959 return b; 1960#endif 1961} 1962 1963 1964 1965/* 1966 * Deallocate an XMesaBuffer structure and all related info. 1967 */ 1968void XMesaDestroyBuffer( XMesaBuffer b ) 1969{ 1970 int client = 0; 1971 1972#ifdef XFree86Server 1973 if (b->frontbuffer) 1974 client = CLIENT_ID(b->frontbuffer->id); 1975#endif 1976 1977 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1978 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1979 if (b->swapgc) XMesaFreeGC( b->xm_visual->display, b->swapgc ); 1980 1981 if (b->backimage) { 1982#if defined(USE_XSHM) && !defined(XFree86Server) 1983 if (b->shm) { 1984 XShmDetach( b->xm_visual->display, &b->shminfo ); 1985 XDestroyImage( b->backimage ); 1986 shmdt( b->shminfo.shmaddr ); 1987 } 1988 else 1989#endif 1990 XMesaDestroyImage( b->backimage ); 1991 } 1992 if (b->backpixmap) { 1993 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 1994 if (b->xm_visual->hpcr_clear_flag) { 1995 XMesaFreePixmap( b->xm_visual->display, 1996 b->xm_visual->hpcr_clear_pixmap ); 1997 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 1998 } 1999 } 2000 if (b->rowimage) { 2001 FREE( b->rowimage->data ); 2002 b->rowimage->data = NULL; 2003 XMesaDestroyImage( b->rowimage ); 2004 } 2005 2006 free_xmesa_buffer(client, b); 2007} 2008 2009 2010 2011/* 2012 * Bind buffer b to context c and make c the current rendering context. 2013 */ 2014GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2015{ 2016 return XMesaMakeCurrent2( c, b, b ); 2017} 2018 2019 2020/* 2021 * Bind buffer b to context c and make c the current rendering context. 2022 */ 2023GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2024 XMesaBuffer readBuffer ) 2025{ 2026 if (c) { 2027 if (!drawBuffer || !readBuffer) 2028 return GL_FALSE; /* must specify buffers! */ 2029 2030#ifdef FX 2031 if (drawBuffer->FXctx) { 2032 fxMesaMakeCurrent(drawBuffer->FXctx); 2033 2034 c->xm_draw_buffer = drawBuffer; 2035 c->xm_read_buffer = readBuffer; 2036 c->xm_buffer = drawBuffer; 2037 2038 return GL_TRUE; 2039 } 2040#endif 2041 if (&(c->mesa) == _mesa_get_current_context() 2042 && c->xm_draw_buffer == drawBuffer 2043 && c->xm_read_buffer == readBuffer 2044 && c->xm_draw_buffer->wasCurrent) { 2045 /* same context and buffer, do nothing */ 2046 return GL_TRUE; 2047 } 2048 2049 c->xm_draw_buffer = drawBuffer; 2050 c->xm_read_buffer = readBuffer; 2051 c->xm_buffer = drawBuffer; 2052 2053 _mesa_make_current2(&(c->mesa), 2054 &drawBuffer->mesa_buffer, 2055 &readBuffer->mesa_buffer); 2056 2057 if (c->mesa.Viewport.Width == 0) { 2058 /* initialize viewport to window size */ 2059 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2060 c->mesa.Scissor.Width = drawBuffer->width; 2061 c->mesa.Scissor.Height = drawBuffer->height; 2062 } 2063 2064 if (c->xm_visual->mesa_visual.rgbMode) { 2065 /* 2066 * Must recompute and set these pixel values because colormap 2067 * can be different for different windows. 2068 */ 2069 c->clearpixel = xmesa_color_to_pixel( c, 2070 c->clearcolor[0], 2071 c->clearcolor[1], 2072 c->clearcolor[2], 2073 c->clearcolor[3], 2074 c->xm_visual->undithered_pf); 2075 XMesaSetForeground(c->display, c->xm_draw_buffer->cleargc, c->clearpixel); 2076 } 2077 2078 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2079 c->xm_draw_buffer->wasCurrent = GL_TRUE; 2080 } 2081 else { 2082 /* Detach */ 2083 _mesa_make_current2( NULL, NULL, NULL ); 2084 } 2085 return GL_TRUE; 2086} 2087 2088 2089/* 2090 * Unbind the context c from its buffer. 2091 */ 2092GLboolean XMesaUnbindContext( XMesaContext c ) 2093{ 2094 /* A no-op for XFree86 integration purposes */ 2095 return GL_TRUE; 2096} 2097 2098 2099XMesaContext XMesaGetCurrentContext( void ) 2100{ 2101 GET_CURRENT_CONTEXT(ctx); 2102 if (ctx) { 2103 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2104 return xmesa; 2105 } 2106 else { 2107 return 0; 2108 } 2109} 2110 2111 2112XMesaBuffer XMesaGetCurrentBuffer( void ) 2113{ 2114 GET_CURRENT_CONTEXT(ctx); 2115 if (ctx) { 2116 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2117 return xmesa->xm_draw_buffer; 2118 } 2119 else { 2120 return 0; 2121 } 2122} 2123 2124 2125/* New in Mesa 3.1 */ 2126XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2127{ 2128 GET_CURRENT_CONTEXT(ctx); 2129 if (ctx) { 2130 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2131 return xmesa->xm_read_buffer; 2132 } 2133 else { 2134 return 0; 2135 } 2136} 2137 2138 2139GLboolean XMesaForceCurrent(XMesaContext c) 2140{ 2141 if (c) { 2142 if (&(c->mesa) != _mesa_get_current_context()) { 2143 _mesa_make_current(&(c->mesa), &c->xm_draw_buffer->mesa_buffer); 2144 } 2145 } 2146 else { 2147 _mesa_make_current(NULL, NULL); 2148 } 2149 return GL_TRUE; 2150} 2151 2152 2153GLboolean XMesaLoseCurrent(XMesaContext c) 2154{ 2155 (void) c; 2156 _mesa_make_current(NULL, NULL); 2157 return GL_TRUE; 2158} 2159 2160 2161/* 2162 * Switch 3Dfx support hack between window and full-screen mode. 2163 */ 2164GLboolean XMesaSetFXmode( GLint mode ) 2165{ 2166#ifdef FX 2167 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2168 if (fx && fx[0] != 'd') { 2169 GET_CURRENT_CONTEXT(ctx); 2170 GrHwConfiguration hw; 2171 if (!FX_grSstQueryHardware(&hw)) { 2172 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2173 return GL_FALSE; 2174 } 2175 if (hw.num_sst < 1) { 2176 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2177 return GL_FALSE; 2178 } 2179 if (ctx) { 2180 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2181 if (mode == XMESA_FX_WINDOW) { 2182 if (xmesa->xm_draw_buffer->FXisHackUsable) { 2183 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2184 xmesa->xm_draw_buffer->FXwindowHack = GL_TRUE; 2185 return GL_TRUE; 2186 } 2187 } 2188 else if (mode == XMESA_FX_FULLSCREEN) { 2189 FX_grSstControl(GR_CONTROL_ACTIVATE); 2190 xmesa->xm_draw_buffer->FXwindowHack = GL_FALSE; 2191 return GL_TRUE; 2192 } 2193 else { 2194 /* Error: Bad mode value */ 2195 } 2196 } 2197 } 2198 /*fprintf(stderr, "fallthrough\n");*/ 2199#else 2200 (void) mode; 2201#endif 2202 return GL_FALSE; 2203} 2204 2205 2206 2207#ifdef FX 2208/* 2209 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2210 */ 2211static void FXgetImage( XMesaBuffer b ) 2212{ 2213 GET_CURRENT_CONTEXT(ctx); 2214 static unsigned short pixbuf[MAX_WIDTH]; 2215 GLuint x, y; 2216 int xpos, ypos; 2217 XMesaWindow root; 2218 unsigned int bw, depth, width, height; 2219 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2220 2221#ifdef XFree86Server 2222 x = b->frontbuffer->x; 2223 y = b->frontbuffer->y; 2224 width = b->frontbuffer->width; 2225 height = b->frontbuffer->height; 2226 depth = b->frontbuffer->depth; 2227#else 2228 XGetGeometry( b->xm_visual->display, b->frontbuffer, 2229 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2230#endif 2231 if (b->width != width || b->height != height) { 2232 b->width = MIN2((int)width, b->FXctx->width); 2233 b->height = MIN2((int)height, b->FXctx->height); 2234 if (b->width & 1) 2235 b->width--; /* prevent odd width */ 2236 xmesa_alloc_back_buffer( b ); 2237 } 2238 2239 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2240 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2241 /* Special case: 16bpp RGB */ 2242 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2243 0, b->FXctx->height - b->height, /*pos*/ 2244 b->width, b->height, /* size */ 2245 b->width * sizeof(GLushort), /* stride */ 2246 b->backimage->data); /* dest buffer */ 2247 } 2248 else if (b->xm_visual->dithered_pf==PF_Dither 2249 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2250 /* Special case: 8bpp RGB */ 2251 for (y=0;y<b->height;y++) { 2252 GLubyte *ptr = (GLubyte*) b->backimage->data 2253 + b->backimage->bytes_per_line * y; 2254 XDITHER_SETUP(y); 2255 2256 /* read row from 3Dfx frame buffer */ 2257 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2258 0, b->FXctx->height-(b->height-y), 2259 b->width, 1, 2260 0, 2261 pixbuf ); 2262 2263 /* write to XImage back buffer */ 2264 for (x=0;x<b->width;x++) { 2265 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2266 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2267 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2268 *ptr++ = XDITHER( x, r, g, b); 2269 } 2270 } 2271 } 2272 else { 2273 /* General case: slow! */ 2274 for (y=0;y<b->height;y++) { 2275 /* read row from 3Dfx frame buffer */ 2276 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2277 0, b->FXctx->height-(b->height-y), 2278 b->width, 1, 2279 0, 2280 pixbuf ); 2281 2282 /* write to XImage back buffer */ 2283 for (x=0;x<b->width;x++) { 2284 XMesaPutPixel(b->backimage,x,y, 2285 xmesa_color_to_pixel(xmesa, 2286 (pixbuf[x] & 0xf800) >> 8, 2287 (pixbuf[x] & 0x07e0) >> 3, 2288 (pixbuf[x] & 0x001f) << 3, 2289 0xff, 2290 b->xm_visual->undithered_pf)); 2291 } 2292 } 2293 } 2294 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2295} 2296#endif 2297 2298 2299/* 2300 * Copy the back buffer to the front buffer. If there's no back buffer 2301 * this is a no-op. 2302 */ 2303void XMesaSwapBuffers( XMesaBuffer b ) 2304{ 2305 GET_CURRENT_CONTEXT(ctx); 2306 2307 /* If we're swapping the buffer associated with the current context 2308 * we have to flush any pending rendering commands first. 2309 */ 2310 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2311 _mesa_notifySwapBuffers(ctx); 2312 2313 if (b->db_state) { 2314#ifdef FX 2315 if (b->FXctx) { 2316 fxMesaSwapBuffers(); 2317 2318 if (b->FXwindowHack) 2319 FXgetImage(b); 2320 else 2321 return; 2322 } 2323#endif 2324 if (b->backimage) { 2325 /* Copy Ximage from host's memory to server's window */ 2326#if defined(USE_XSHM) && !defined(XFree86Server) 2327 if (b->shm) { 2328 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2329 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2330 b->swapgc, 2331 b->backimage, 0, 0, 2332 0, 0, b->width, b->height, False ); 2333 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2334 } 2335 else 2336#endif 2337 { 2338 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2339 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2340 b->swapgc, 2341 b->backimage, 0, 0, 2342 0, 0, b->width, b->height ); 2343 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2344 } 2345 } 2346 else { 2347 /* Copy pixmap to window on server */ 2348 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2349 XMesaCopyArea( b->xm_visual->display, 2350 b->backpixmap, /* source drawable */ 2351 b->frontbuffer, /* dest. drawable */ 2352 b->swapgc, 2353 0, 0, b->width, b->height, /* source region */ 2354 0, 0 /* dest region */ 2355 ); 2356 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2357 } 2358 } 2359#if !defined(XFree86Server) 2360 XSync( b->xm_visual->display, False ); 2361#endif 2362} 2363 2364 2365 2366/* 2367 * Copy sub-region of back buffer to front buffer 2368 */ 2369void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2370{ 2371 GET_CURRENT_CONTEXT(ctx); 2372 2373 /* If we're swapping the buffer associated with the current context 2374 * we have to flush any pending rendering commands first. 2375 */ 2376 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2377 _mesa_notifySwapBuffers(ctx); 2378 2379 if (b->db_state) { 2380 int yTop = b->height - y - height; 2381#ifdef FX 2382 if (b->FXctx) { 2383 fxMesaSwapBuffers(); 2384 if (b->FXwindowHack) 2385 FXgetImage(b); 2386 else 2387 return; 2388 } 2389#endif 2390 if (b->backimage) { 2391 /* Copy Ximage from host's memory to server's window */ 2392#if defined(USE_XSHM) && !defined(XFree86Server) 2393 if (b->shm) { 2394 /* XXX assuming width and height aren't too large! */ 2395 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2396 b->swapgc, 2397 b->backimage, x, yTop, 2398 x, yTop, width, height, False ); 2399 /* wait for finished event??? */ 2400 } 2401 else 2402#endif 2403 { 2404 /* XXX assuming width and height aren't too large! */ 2405 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2406 b->swapgc, 2407 b->backimage, x, yTop, 2408 x, yTop, width, height ); 2409 } 2410 } 2411 else { 2412 /* Copy pixmap to window on server */ 2413 XMesaCopyArea( b->xm_visual->display, 2414 b->backpixmap, /* source drawable */ 2415 b->frontbuffer, /* dest. drawable */ 2416 b->swapgc, 2417 x, yTop, width, height, /* source region */ 2418 x, yTop /* dest region */ 2419 ); 2420 } 2421 } 2422} 2423 2424 2425/* 2426 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2427 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2428 * back buffer directly. 2429 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2430 * ximage - pointer to back buffer's XImage, or NULL 2431 * Return: GL_TRUE = context is double buffered 2432 * GL_FALSE = context is single buffered 2433 */ 2434GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2435 XMesaPixmap *pixmap, 2436 XMesaImage **ximage ) 2437{ 2438 if (b->db_state) { 2439 if (pixmap) *pixmap = b->backpixmap; 2440 if (ximage) *ximage = b->backimage; 2441 return GL_TRUE; 2442 } 2443 else { 2444 *pixmap = 0; 2445 *ximage = NULL; 2446 return GL_FALSE; 2447 } 2448} 2449 2450 2451/* 2452 * Return the depth buffer associated with an XMesaBuffer. 2453 * Input: b - the XMesa buffer handle 2454 * Output: width, height - size of buffer in pixels 2455 * bytesPerValue - bytes per depth value (2 or 4) 2456 * buffer - pointer to depth buffer values 2457 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2458 */ 2459GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2460 GLint *bytesPerValue, void **buffer ) 2461{ 2462 if (!b->mesa_buffer.DepthBuffer) { 2463 *width = 0; 2464 *height = 0; 2465 *bytesPerValue = 0; 2466 *buffer = 0; 2467 return GL_FALSE; 2468 } 2469 else { 2470 *width = b->mesa_buffer.Width; 2471 *height = b->mesa_buffer.Height; 2472 *bytesPerValue = sizeof(GLdepth); 2473 *buffer = b->mesa_buffer.DepthBuffer; 2474 return GL_TRUE; 2475 } 2476} 2477 2478 2479void XMesaFlush( XMesaContext c ) 2480{ 2481 if (c && c->xm_visual) { 2482#ifdef XFree86Server 2483 /* NOT_NEEDED */ 2484#else 2485 XSync( c->xm_visual->display, False ); 2486#endif 2487 } 2488} 2489 2490 2491 2492const char *XMesaGetString( XMesaContext c, int name ) 2493{ 2494 (void) c; 2495 if (name==XMESA_VERSION) { 2496 return "5.0"; 2497 } 2498 else if (name==XMESA_EXTENSIONS) { 2499 return ""; 2500 } 2501 else { 2502 return NULL; 2503 } 2504} 2505 2506 2507 2508XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2509{ 2510 XMesaBuffer b; 2511 for (b=XMesaBufferList; b; b=b->Next) { 2512 if (b->frontbuffer==d && b->display==dpy) { 2513 return b; 2514 } 2515 } 2516 return NULL; 2517} 2518 2519 2520 2521/* 2522 * Look for XMesaBuffers whose X window has been destroyed. 2523 * Deallocate any such XMesaBuffers. 2524 */ 2525void XMesaGarbageCollect( void ) 2526{ 2527 XMesaBuffer b, next; 2528 for (b=XMesaBufferList; b; b=next) { 2529 next = b->Next; 2530 if (b->display && b->frontbuffer && b->type == WINDOW) { 2531#ifdef XFree86Server 2532 /* NOT_NEEDED */ 2533#else 2534 XSync(b->display, False); 2535 if (!window_exists( b->display, b->frontbuffer )) { 2536 /* found a dead window, free the ancillary info */ 2537 XMesaDestroyBuffer( b ); 2538 } 2539#endif 2540 } 2541 } 2542} 2543 2544 2545void XMesaReset( void ) 2546{ 2547 while (XMesaBufferList) 2548 XMesaDestroyBuffer(XMesaBufferList); 2549 2550 XMesaBufferList = NULL; 2551} 2552 2553 2554unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2555 GLfloat red, GLfloat green, 2556 GLfloat blue, GLfloat alpha ) 2557{ 2558 GLint r = (GLint) (red * 255.0F); 2559 GLint g = (GLint) (green * 255.0F); 2560 GLint b = (GLint) (blue * 255.0F); 2561 GLint a = (GLint) (alpha * 255.0F); 2562 2563 switch (xmesa->pixelformat) { 2564 case PF_Index: 2565 return 0; 2566 case PF_Truecolor: 2567 { 2568 unsigned long p; 2569 PACK_TRUECOLOR( p, r, g, b ); 2570 return p; 2571 } 2572 case PF_8A8B8G8R: 2573 return PACK_8A8B8G8R( r, g, b, a ); 2574 case PF_8R8G8B: 2575 return PACK_8R8G8B( r, g, b ); 2576 case PF_5R6G5B: 2577 return PACK_5R6G5B( r, g, b ); 2578 case PF_Dither: 2579 { 2580 DITHER_SETUP; 2581 return DITHER( x, y, r, g, b ); 2582 } 2583 case PF_1Bit: 2584 /* 382 = (3*255)/2 */ 2585 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2586 case PF_HPCR: 2587 return DITHER_HPCR(x, y, r, g, b); 2588 case PF_Lookup: 2589 { 2590 LOOKUP_SETUP; 2591 return LOOKUP( r, g, b ); 2592 } 2593 case PF_Grayscale: 2594 return GRAY_RGB( r, g, b ); 2595 case PF_Dither_5R6G5B: 2596 /* fall through */ 2597 case PF_Dither_True: 2598 { 2599 unsigned long p; 2600 PACK_TRUEDITHER(p, x, y, r, g, b); 2601 return p; 2602 } 2603 default: 2604 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2605 } 2606 return 0; 2607} 2608 2609 2610/* 2611 * This is typically called when the window size changes and we need 2612 * to reallocate the buffer's back/depth/stencil/accum buffers. 2613 */ 2614void XMesaResizeBuffers( XMesaBuffer b ) 2615{ 2616 xmesa_resize_buffers( &(b->mesa_buffer) ); 2617 2618} 2619 2620