xm_api.c revision ec0585883a85a495d94e24970d64e5d6fc889147
1/* $Id: xm_api.c,v 1.6 2000/11/05 18:26:12 keithw Exp $ */ 2 3/* 4 * Mesa 3-D graphics library 5 * Version: 3.3 6 * 7 * Copyright (C) 1999-2000 Brian Paul All Rights Reserved. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included 17 * in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 */ 26 27 28/* 29 * This file contains the implementations of all the XMesa* functions. 30 * 31 * 32 * NOTES: 33 * 34 * The window coordinate system origin (0,0) is in the lower-left corner 35 * of the window. X11's window coordinate origin is in the upper-left 36 * corner of the window. Therefore, most drawing functions in this 37 * file have to flip Y coordinates. 38 * 39 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 40 * in support for the MIT Shared Memory extension. If enabled, when you 41 * use an Ximage for the back buffer in double buffered mode, the "swap" 42 * operation will be faster. You must also link with -lXext. 43 * 44 * Byte swapping: If the Mesa host and the X display use a different 45 * byte order then there's some trickiness to be aware of when using 46 * XImages. The byte ordering used for the XImage is that of the X 47 * display, not the Mesa host. 48 * The color-to-pixel encoding for True/DirectColor must be done 49 * according to the display's visual red_mask, green_mask, and blue_mask. 50 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 51 * do byte swapping if needed. If one wants to directly "poke" the pixel 52 * into the XImage's buffer then the pixel must be byte swapped first. In 53 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 54 * and use XPutPixel everywhere except in the implementation of 55 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 56 * instead of using XPutPixel we "poke" our values after byte-swapping 57 * the clear pixel value if needed. 58 * 59 */ 60 61#ifdef __CYGWIN__ 62#undef WIN32 63#undef __WIN32__ 64#endif 65 66#include "glxheader.h" 67#include "GL/xmesa.h" 68#include "xmesaP.h" 69#include "context.h" 70#include "extensions.h" 71#include "glthread.h" 72#include "matrix.h" 73#include "mem.h" 74#include "types.h" 75#ifdef HAVE_CONFIG_H 76#include "conf.h" 77#endif 78#include "macros.h" 79#include "swrast/swrast.h" 80#include "swrast_setup/swrast_setup.h" 81 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 * X/Mesa error reporting function: 163 */ 164static void error( const char *msg ) 165{ 166 if (getenv("MESA_DEBUG")) 167 fprintf( stderr, "X/Mesa error: %s\n", msg ); 168} 169 170 171/* 172 * Return the host's byte order as LSBFirst or MSBFirst ala X. 173 */ 174#ifndef XFree86Server 175static int host_byte_order( void ) 176{ 177 int i = 1; 178 char *cptr = (char *) &i; 179 return (*cptr==1) ? LSBFirst : MSBFirst; 180} 181#endif 182 183 184/* 185 * Error handling. 186 */ 187#ifndef XFree86Server 188static int mesaXErrorFlag = 0; 189 190static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 191{ 192 (void) dpy; 193 (void) event; 194 mesaXErrorFlag = 1; 195 return 0; 196} 197#endif 198 199 200/* 201 * Check if the X Shared Memory extension is available. 202 * Return: 0 = not available 203 * 1 = shared XImage support available 204 * 2 = shared Pixmap support available also 205 */ 206#ifndef XFree86Server 207static int check_for_xshm( XMesaDisplay *display ) 208{ 209#ifdef USE_XSHM 210 int major, minor, ignore; 211 Bool pixmaps; 212 213 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 214 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 215 return (pixmaps==True) ? 2 : 1; 216 } 217 else { 218 return 0; 219 } 220 } 221 else { 222 return 0; 223 } 224#else 225 /* Can't compile XSHM support */ 226 return 0; 227#endif 228} 229#endif 230 231 232/* 233 * Return the width and height of the given drawable. 234 */ 235static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 236 unsigned int *width, unsigned int *height) 237{ 238#ifdef XFree86Server 239 (void) dpy; 240 *width = d->width; 241 *height = d->height; 242#else 243 Window root; 244 int x, y; 245 unsigned int bw, depth; 246 247 _glthread_LOCK_MUTEX(_xmesa_lock); 248 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 249 _glthread_UNLOCK_MUTEX(_xmesa_lock); 250#endif 251} 252 253 254/* 255 * Apply gamma correction to an intensity value in [0..max]. Return the 256 * new intensity value. 257 */ 258static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 259{ 260 if (gamma == 1.0) { 261 return value; 262 } 263 else { 264 double x = (double) value / (double) max; 265 return (GLint) ((GLfloat) max * pow( x, 1.0F/gamma ) + 0.5F); 266 } 267} 268 269 270 271/* 272 * Return the true number of bits per pixel for XImages. 273 * For example, if we request a 24-bit deep visual we may actually need/get 274 * 32bpp XImages. This function returns the appropriate bpp. 275 * Input: dpy - the X display 276 * visinfo - desribes the visual to be used for XImages 277 * Return: true number of bits per pixel for XImages 278 */ 279#define GET_BITS_PER_PIXEL(xmv) bits_per_pixel(xmv) 280 281#ifdef XFree86Server 282 283static int bits_per_pixel( XMesaVisual xmv ) 284{ 285 XMesaVisualInfo visinfo = xmv->visinfo; 286 const int depth = visinfo->nplanes; 287 int i; 288 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 289 if (screenInfo.formats[i].depth == depth) 290 return screenInfo.formats[i].bitsPerPixel; 291 } 292 return depth; /* should never get here, but this should be safe */ 293} 294 295#else 296 297static int bits_per_pixel( XMesaVisual xmv ) 298{ 299 XMesaDisplay *dpy = xmv->display; 300 XMesaVisualInfo visinfo = xmv->visinfo; 301 XMesaImage *img; 302 int bitsPerPixel; 303 /* Create a temporary XImage */ 304 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 305 ZPixmap, 0, /*format, offset*/ 306 (char*) MALLOC(8), /*data*/ 307 1, 1, /*width, height*/ 308 32, /*bitmap_pad*/ 309 0 /*bytes_per_line*/ 310 ); 311 assert(img); 312 /* grab the bits/pixel value */ 313 bitsPerPixel = img->bits_per_pixel; 314 /* free the XImage */ 315 FREE( img->data ); 316 img->data = NULL; 317 XMesaDestroyImage( img ); 318 return bitsPerPixel; 319} 320#endif 321 322 323 324/* 325 * Determine if a given X window ID is valid (window exists). 326 * Do this by calling XGetWindowAttributes() for the window and 327 * checking if we catch an X error. 328 * Input: dpy - the display 329 * win - the window to check for existance 330 * Return: GL_TRUE - window exists 331 * GL_FALSE - window doesn't exist 332 */ 333#ifndef XFree86Server 334static GLboolean WindowExistsFlag; 335 336static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 337{ 338 (void) dpy; 339 if (xerr->error_code == BadWindow) { 340 WindowExistsFlag = GL_FALSE; 341 } 342 return 0; 343} 344 345static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 346{ 347 XWindowAttributes wa; 348 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 349 WindowExistsFlag = GL_TRUE; 350 old_handler = XSetErrorHandler(window_exists_err_handler); 351 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 352 XSetErrorHandler(old_handler); 353 return WindowExistsFlag; 354} 355#endif 356 357 358 359/**********************************************************************/ 360/***** Linked list of XMesaBuffers *****/ 361/**********************************************************************/ 362 363static XMesaBuffer XMesaBufferList = NULL; 364 365 366/* Allocate a new XMesaBuffer, add to linked list */ 367static XMesaBuffer alloc_xmesa_buffer(void) 368{ 369 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 370 if (b) { 371 b->Next = XMesaBufferList; 372 XMesaBufferList = b; 373 } 374 return b; 375} 376 377 378/* 379 * Find an XMesaBuffer by matching X display and colormap but NOT matching 380 * the notThis buffer. 381 */ 382static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 383 XMesaColormap cmap, 384 XMesaBuffer notThis) 385{ 386 XMesaBuffer b; 387 for (b=XMesaBufferList; b; b=b->Next) { 388 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 389 return b; 390 } 391 } 392 return NULL; 393} 394 395 396/* 397 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 398 * entries. 399 */ 400static void free_xmesa_buffer(int client, XMesaBuffer buffer) 401{ 402 XMesaBuffer prev = NULL, b; 403 (void) client; 404 for (b=XMesaBufferList; b; b=b->Next) { 405 if (b==buffer) { 406 /* unlink bufer from list */ 407 if (prev) 408 prev->Next = buffer->Next; 409 else 410 XMesaBufferList = buffer->Next; 411 /* Check to free X colors */ 412 if (buffer->num_alloced>0) { 413 /* If no other buffer uses this X colormap then free the colors. */ 414 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 415#ifdef XFree86Server 416 (void)FreeColors(buffer->cmap, client, 417 buffer->num_alloced, buffer->alloced_colors, 418 0); 419#else 420 XFreeColors(buffer->display, buffer->cmap, 421 buffer->alloced_colors, buffer->num_alloced, 0); 422#endif 423 } 424 } 425 FREE(buffer); 426 return; 427 } 428 /* continue search */ 429 prev = b; 430 } 431 /* buffer not found in XMesaBufferList */ 432 gl_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 433} 434 435 436/* Copy X color table stuff from one XMesaBuffer to another. */ 437static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 438{ 439 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 440 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 441 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 442 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 443 dst->num_alloced = src->num_alloced; 444 MEMCPY(dst->alloced_colors, src->alloced_colors, 445 sizeof(src->alloced_colors)); 446} 447 448 449 450/**********************************************************************/ 451/***** Misc Private Functions *****/ 452/**********************************************************************/ 453 454 455/* 456 * Return number of bits set in n. 457 */ 458static int bitcount( unsigned long n ) 459{ 460 int bits; 461 for (bits=0; n>0; n=n>>1) { 462 if (n&1) { 463 bits++; 464 } 465 } 466 return bits; 467} 468 469 470 471/* 472 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 473 * Return: GL_TRUE if success, GL_FALSE if error 474 */ 475#ifndef XFree86Server 476static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 477{ 478#ifdef USE_XSHM 479 /* 480 * We have to do a _lot_ of error checking here to be sure we can 481 * really use the XSHM extension. It seems different servers trigger 482 * errors at different points if the extension won't work. Therefore 483 * we have to be very careful... 484 */ 485 GC gc; 486 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 487 488 b->backimage = XShmCreateImage( b->xm_visual->display, 489 b->xm_visual->visinfo->visual, 490 b->xm_visual->visinfo->depth, 491 ZPixmap, NULL, &b->shminfo, 492 b->width, b->height ); 493 if (b->backimage == NULL) { 494 error("alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 495 b->shm = 0; 496 return GL_FALSE; 497 } 498 499 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 500 * b->backimage->height, IPC_CREAT|0777 ); 501 if (b->shminfo.shmid < 0) { 502 if (getenv("MESA_DEBUG")) 503 perror("alloc_back_buffer"); 504 XDestroyImage( b->backimage ); 505 b->backimage = NULL; 506 error("alloc_back_buffer: Shared memory error (shmget), disabling."); 507 b->shm = 0; 508 return GL_FALSE; 509 } 510 511 b->shminfo.shmaddr = b->backimage->data 512 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 513 if (b->shminfo.shmaddr == (char *) -1) { 514 if (getenv("MESA_DEBUG")) 515 perror("alloc_back_buffer"); 516 XDestroyImage( b->backimage ); 517 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 518 b->backimage = NULL; 519 error("alloc_back_buffer: Shared memory error (shmat), disabling."); 520 b->shm = 0; 521 return GL_FALSE; 522 } 523 524 b->shminfo.readOnly = False; 525 mesaXErrorFlag = 0; 526 old_handler = XSetErrorHandler( mesaHandleXError ); 527 /* This may trigger the X protocol error we're ready to catch: */ 528 XShmAttach( b->xm_visual->display, &b->shminfo ); 529 XSync( b->xm_visual->display, False ); 530 531 if (mesaXErrorFlag) { 532 /* we are on a remote display, this error is normal, don't print it */ 533 XFlush( b->xm_visual->display ); 534 mesaXErrorFlag = 0; 535 XDestroyImage( b->backimage ); 536 shmdt( b->shminfo.shmaddr ); 537 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 538 b->backimage = NULL; 539 b->shm = 0; 540 (void) XSetErrorHandler( old_handler ); 541 return GL_FALSE; 542 } 543 544 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 545 546 /* Finally, try an XShmPutImage to be really sure the extension works */ 547 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 548 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 549 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 550 XSync( b->xm_visual->display, False ); 551 XFreeGC( b->xm_visual->display, gc ); 552 (void) XSetErrorHandler( old_handler ); 553 if (mesaXErrorFlag) { 554 XFlush( b->xm_visual->display ); 555 mesaXErrorFlag = 0; 556 XDestroyImage( b->backimage ); 557 shmdt( b->shminfo.shmaddr ); 558 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 559 b->backimage = NULL; 560 b->shm = 0; 561 return GL_FALSE; 562 } 563 564 if (b->backimage) { 565 int height = b->backimage->height; 566 /* Needed by PIXELADDR1 macro */ 567 b->ximage_width1 = b->backimage->bytes_per_line; 568 b->ximage_origin1 = (GLubyte *) b->backimage->data 569 + b->ximage_width1 * (height-1); 570 /* Needed by PIXELADDR2 macro */ 571 b->ximage_width2 = b->backimage->bytes_per_line / 2; 572 b->ximage_origin2 = (GLushort *) b->backimage->data 573 + b->ximage_width2 * (height-1); 574 /* Needed by PIXELADDR3 macro */ 575 b->ximage_width3 = b->backimage->bytes_per_line; 576 b->ximage_origin3 = (GLubyte *) b->backimage->data 577 + b->ximage_width3 * (height-1); 578 /* Needed by PIXELADDR4 macro */ 579 b->ximage_width4 = b->backimage->width; 580 b->ximage_origin4 = (GLuint *) b->backimage->data 581 + b->ximage_width4 * (height-1); 582 } 583 584 return GL_TRUE; 585#else 586 /* Can't compile XSHM support */ 587 return GL_FALSE; 588#endif 589} 590#endif 591 592 593 594/* 595 * Setup an off-screen pixmap or Ximage to use as the back buffer. 596 * Input: b - the X/Mesa buffer 597 */ 598void xmesa_alloc_back_buffer( XMesaBuffer b ) 599{ 600 if (b->db_state==BACK_XIMAGE) { 601 /* Deallocate the old backimage, if any */ 602 if (b->backimage) { 603#if defined(USE_XSHM) && !defined(XFree86Server) 604 if (b->shm) { 605 XShmDetach( b->xm_visual->display, &b->shminfo ); 606 XDestroyImage( b->backimage ); 607 shmdt( b->shminfo.shmaddr ); 608 } 609 else 610#endif 611 XMesaDestroyImage( b->backimage ); 612 b->backimage = NULL; 613 } 614 615 /* Allocate new back buffer */ 616#ifdef XFree86Server 617 { 618 /* Allocate a regular XImage for the back buffer. */ 619 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 620 b->width, b->height, NULL); 621#else 622 if (b->shm==0 623 || alloc_shm_back_buffer(b)==GL_FALSE 624 ) { 625 /* Allocate a regular XImage for the back buffer. */ 626 b->backimage = XCreateImage( b->xm_visual->display, 627 b->xm_visual->visinfo->visual, 628 GET_VISUAL_DEPTH(b->xm_visual), 629 ZPixmap, 0, /* format, offset */ 630 NULL, b->width, b->height, 631 8, 0 ); /* pad, bytes_per_line */ 632#endif 633 if (!b->backimage) { 634 error("alloc_back_buffer: XCreateImage failed."); 635 } 636 b->backimage->data = (char *) MALLOC( b->backimage->height 637 * b->backimage->bytes_per_line ); 638 if (!b->backimage->data) { 639 error("alloc_back_buffer: MALLOC failed."); 640 XMesaDestroyImage( b->backimage ); 641 b->backimage = NULL; 642 } 643 } 644 b->backpixmap = None; 645 } 646 else if (b->db_state==BACK_PIXMAP) { 647 XMesaPixmap old_pixmap = b->backpixmap; 648 /* Free the old back pixmap */ 649 if (b->backpixmap) { 650 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 651 } 652 /* Allocate new back pixmap */ 653 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 654 b->width, b->height, 655 GET_VISUAL_DEPTH(b->xm_visual) ); 656 b->backimage = NULL; 657 /* update other references to backpixmap */ 658 if (b->buffer==(XMesaDrawable)old_pixmap) { 659 b->buffer = (XMesaDrawable)b->backpixmap; 660 } 661 } 662} 663 664 665 666/* 667 * A replacement for XAllocColor. This function should never 668 * fail to allocate a color. When XAllocColor fails, we return 669 * the nearest matching color. If we have to allocate many colors 670 * this function isn't too efficient; the XQueryColors() could be 671 * done just once. 672 * Written by Michael Pichler, Brian Paul, Mark Kilgard 673 * Input: dpy - X display 674 * cmap - X colormap 675 * cmapSize - size of colormap 676 * In/Out: color - the XColor struct 677 * Output: exact - 1=exact color match, 0=closest match 678 * alloced - 1=XAlloc worked, 0=XAlloc failed 679 */ 680static void 681noFaultXAllocColor( int client, 682 XMesaDisplay *dpy, 683 XMesaColormap cmap, 684 int cmapSize, 685 XMesaColor *color, 686 int *exact, int *alloced ) 687{ 688#ifdef XFree86Server 689 Pixel *ppixIn; 690 xrgb *ctable; 691#else 692 /* we'll try to cache ctable for better remote display performance */ 693 static Display *prevDisplay = NULL; 694 static XMesaColormap prevCmap = 0; 695 static int prevCmapSize = 0; 696 static XMesaColor *ctable = NULL; 697#endif 698 XMesaColor subColor; 699 int i, bestmatch; 700 double mindist; /* 3*2^16^2 exceeds long int precision. */ 701 702 (void) client; 703 704 /* First try just using XAllocColor. */ 705#ifdef XFree86Server 706 if (AllocColor(cmap, 707 &color->red, &color->green, &color->blue, 708 &color->pixel, 709 client) == Success) { 710#else 711 if (XAllocColor(dpy, cmap, color)) { 712#endif 713 *exact = 1; 714 *alloced = 1; 715 return; 716 } 717 718 /* Alloc failed, search for closest match */ 719 720 /* Retrieve color table entries. */ 721 /* XXX alloca candidate. */ 722#ifdef XFree86Server 723 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 724 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 725 for (i = 0; i < cmapSize; i++) { 726 ppixIn[i] = i; 727 } 728 QueryColors(cmap, cmapSize, ppixIn, ctable); 729#else 730 if (prevDisplay != dpy || prevCmap != cmap 731 || prevCmapSize != cmapSize || !ctable) { 732 /* free previously cached color table */ 733 if (ctable) 734 FREE(ctable); 735 /* Get the color table from X */ 736 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 737 assert(ctable); 738 for (i = 0; i < cmapSize; i++) { 739 ctable[i].pixel = i; 740 } 741 XQueryColors(dpy, cmap, ctable, cmapSize); 742 prevDisplay = dpy; 743 prevCmap = cmap; 744 prevCmapSize = cmapSize; 745 } 746#endif 747 748 /* Find best match. */ 749 bestmatch = -1; 750 mindist = 0.0; 751 for (i = 0; i < cmapSize; i++) { 752 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 753 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 754 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 755 double dist = dr * dr + dg * dg + db * db; 756 if (bestmatch < 0 || dist < mindist) { 757 bestmatch = i; 758 mindist = dist; 759 } 760 } 761 762 /* Return result. */ 763 subColor.red = ctable[bestmatch].red; 764 subColor.green = ctable[bestmatch].green; 765 subColor.blue = ctable[bestmatch].blue; 766 /* Try to allocate the closest match color. This should only 767 * fail if the cell is read/write. Otherwise, we're incrementing 768 * the cell's reference count. 769 */ 770#ifdef XFree86Server 771 if (AllocColor(cmap, 772 &subColor.red, &subColor.green, &subColor.blue, 773 &subColor.pixel, 774 client) == Success) { 775#else 776 if (XAllocColor(dpy, cmap, &subColor)) { 777#endif 778 *alloced = 1; 779 } 780 else { 781 /* do this to work around a problem reported by Frank Ortega */ 782 subColor.pixel = (unsigned long) bestmatch; 783 subColor.red = ctable[bestmatch].red; 784 subColor.green = ctable[bestmatch].green; 785 subColor.blue = ctable[bestmatch].blue; 786 subColor.flags = DoRed | DoGreen | DoBlue; 787 *alloced = 0; 788 } 789#ifdef XFree86Server 790 FREE(ppixIn); 791 FREE(ctable); 792#else 793 /* don't free table, save it for next time */ 794#endif 795 796 *color = subColor; 797 *exact = 0; 798} 799 800 801 802 803/* 804 * Do setup for PF_GRAYSCALE pixel format. 805 * Note that buffer may be NULL. 806 */ 807static GLboolean setup_grayscale( int client, XMesaVisual v, 808 XMesaBuffer buffer, XMesaColormap cmap ) 809{ 810 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 811 return GL_FALSE; 812 } 813 814 if (buffer) { 815 XMesaBuffer prevBuffer; 816 817 if (!cmap) { 818 return GL_FALSE; 819 } 820 821 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 822 if (prevBuffer && 823 (buffer->xm_visual->gl_visual->RGBAflag == 824 prevBuffer->xm_visual->gl_visual->RGBAflag)) { 825 /* Copy colormap stuff from previous XMesaBuffer which uses same 826 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 827 */ 828 copy_colortable_info(buffer, prevBuffer); 829 } 830 else { 831 /* Allocate 256 shades of gray */ 832 int gray; 833 int colorsfailed = 0; 834 for (gray=0;gray<256;gray++) { 835 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 836 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 837 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 838 int exact, alloced; 839 XMesaColor xcol; 840 xcol.red = (r << 8) | r; 841 xcol.green = (g << 8) | g; 842 xcol.blue = (b << 8) | b; 843 noFaultXAllocColor( client, v->display, 844 cmap, GET_COLORMAP_SIZE(v), 845 &xcol, &exact, &alloced ); 846 if (!exact) { 847 colorsfailed++; 848 } 849 if (alloced) { 850 assert(buffer->num_alloced<256); 851 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 852 buffer->num_alloced++; 853 } 854 855 /*OLD 856 assert(gray < 576); 857 buffer->color_table[gray*3+0] = xcol.pixel; 858 buffer->color_table[gray*3+1] = xcol.pixel; 859 buffer->color_table[gray*3+2] = xcol.pixel; 860 assert(xcol.pixel < 65536); 861 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 862 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 863 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 864 */ 865 buffer->color_table[gray] = xcol.pixel; 866 assert(xcol.pixel < 65536); 867 buffer->pixel_to_r[xcol.pixel] = gray; 868 buffer->pixel_to_g[xcol.pixel] = gray; 869 buffer->pixel_to_b[xcol.pixel] = gray; 870 } 871 872 if (colorsfailed && getenv("MESA_DEBUG")) { 873 fprintf( stderr, 874 "Note: %d out of 256 needed colors do not match exactly.\n", 875 colorsfailed ); 876 } 877 } 878 } 879 880 v->dithered_pf = PF_GRAYSCALE; 881 v->undithered_pf = PF_GRAYSCALE; 882 return GL_TRUE; 883} 884 885 886 887/* 888 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 889 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 890 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 891 * color. While this function was originally designed just for 8-bit 892 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 893 * Dithering code contributed by Bob Mercier. 894 */ 895static GLboolean setup_dithered_color( int client, XMesaVisual v, 896 XMesaBuffer buffer, XMesaColormap cmap ) 897{ 898 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 899 return GL_FALSE; 900 } 901 902 if (buffer) { 903 XMesaBuffer prevBuffer; 904 905 if (!cmap) { 906 return GL_FALSE; 907 } 908 909 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 910 if (prevBuffer && 911 (buffer->xm_visual->gl_visual->RGBAflag == 912 prevBuffer->xm_visual->gl_visual->RGBAflag)) { 913 /* Copy colormap stuff from previous, matching XMesaBuffer. 914 * Do this to avoid time spent in noFaultXAllocColor. 915 */ 916 copy_colortable_info(buffer, prevBuffer); 917 } 918 else { 919 /* Allocate X colors and initialize color_table[], red_table[], etc */ 920 int r, g, b, i; 921 int colorsfailed = 0; 922 for (r = 0; r < _R; r++) { 923 for (g = 0; g < _G; g++) { 924 for (b = 0; b < _B; b++) { 925 XMesaColor xcol; 926 int exact, alloced; 927 xcol.red =gamma_adjust(v->RedGamma, r*65535/(_R-1),65535); 928 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(_G-1),65535); 929 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(_B-1),65535); 930 noFaultXAllocColor( client, v->display, 931 cmap, GET_COLORMAP_SIZE(v), 932 &xcol, &exact, &alloced ); 933 if (!exact) { 934 colorsfailed++; 935 } 936 if (alloced) { 937 assert(buffer->num_alloced<256); 938 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 939 buffer->num_alloced++; 940 } 941 i = _MIX( r, g, b ); 942 assert(i < 576); 943 buffer->color_table[i] = xcol.pixel; 944 assert(xcol.pixel < 65536); 945 buffer->pixel_to_r[xcol.pixel] = r * 255 / (_R-1); 946 buffer->pixel_to_g[xcol.pixel] = g * 255 / (_G-1); 947 buffer->pixel_to_b[xcol.pixel] = b * 255 / (_B-1); 948 } 949 } 950 } 951 952 if (colorsfailed && getenv("MESA_DEBUG")) { 953 fprintf( stderr, 954 "Note: %d out of %d needed colors do not match exactly.\n", 955 colorsfailed, _R*_G*_B ); 956 } 957 } 958 } 959 960 v->dithered_pf = PF_DITHER; 961 v->undithered_pf = PF_LOOKUP; 962 return GL_TRUE; 963} 964 965 966/* 967 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 968 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 969 * Special dithering tables have to be initialized. 970 */ 971static void setup_8bit_hpcr( XMesaVisual v ) 972{ 973 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 974 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 975 * on the root window AND the colormap obtainable by XGetRGBColormaps 976 * for that atom must be set on the window. (see also tkInitWindow) 977 * If that colormap is not set, the output will look stripy. 978 */ 979 980 /* Setup color tables with gamma correction */ 981 int i; 982 double g; 983 984 g = 1.0 / v->RedGamma; 985 for (i=0; i<256; i++) { 986 GLint red = (GLint) (255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g ) + 0.5); 987 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 988 } 989 990 g = 1.0 / v->GreenGamma; 991 for (i=0; i<256; i++) { 992 GLint green = (GLint) (255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g ) + 0.5); 993 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 994 } 995 996 g = 1.0 / v->BlueGamma; 997 for (i=0; i<256; i++) { 998 GLint blue = (GLint) (255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g ) + 0.5); 999 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 1000 } 1001 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 1002 v->dithered_pf = PF_HPCR; 1003 1004 /* which method should I use to clear */ 1005 /* GL_FALSE: keep the ordinary method */ 1006 /* GL_TRUE : clear with dither pattern */ 1007 v->hpcr_clear_flag = getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 1008 1009 if (v->hpcr_clear_flag) { 1010 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 1011 DefaultRootWindow(v->display), 1012 16, 2, 8); 1013#ifndef XFree86Server 1014 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1015 0, 0, 16, 2, AllPlanes, ZPixmap); 1016#endif 1017 } 1018} 1019 1020 1021/* 1022 * Setup RGB rendering for a window with a True/DirectColor visual. 1023 */ 1024static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1025 XMesaWindow window, XMesaColormap cmap ) 1026{ 1027 unsigned long rmask, gmask, bmask; 1028 (void) buffer; 1029 (void) window; 1030 (void) cmap; 1031 1032 /* Compute red multiplier (mask) and bit shift */ 1033 v->rshift = 0; 1034 rmask = GET_REDMASK(v); 1035 while ((rmask & 1)==0) { 1036 v->rshift++; 1037 rmask = rmask >> 1; 1038 } 1039 1040 /* Compute green multiplier (mask) and bit shift */ 1041 v->gshift = 0; 1042 gmask = GET_GREENMASK(v); 1043 while ((gmask & 1)==0) { 1044 v->gshift++; 1045 gmask = gmask >> 1; 1046 } 1047 1048 /* Compute blue multiplier (mask) and bit shift */ 1049 v->bshift = 0; 1050 bmask = GET_BLUEMASK(v); 1051 while ((bmask & 1)==0) { 1052 v->bshift++; 1053 bmask = bmask >> 1; 1054 } 1055 1056 /* 1057 * Compute component-to-pixel lookup tables and dithering kernel 1058 */ 1059 { 1060 static GLubyte kernel[16] = { 1061 0*16, 8*16, 2*16, 10*16, 1062 12*16, 4*16, 14*16, 6*16, 1063 3*16, 11*16, 1*16, 9*16, 1064 15*16, 7*16, 13*16, 5*16, 1065 }; 1066 GLint rBits = bitcount(rmask); 1067 GLint gBits = bitcount(gmask); 1068 GLint bBits = bitcount(bmask); 1069 GLint minBits; 1070 GLuint i; 1071 1072 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1073 for (i=0; i<=rmask; i++) 1074 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1075 for (i=0; i<=gmask; i++) 1076 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1077 for (i=0; i<=bmask; i++) 1078 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1079 1080 /* convert RGB values from [0,255] to pixel components */ 1081 1082 for (i=0;i<256;i++) { 1083 GLint r = gamma_adjust(v->RedGamma, i, 255); 1084 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1085 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1086 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1087 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1088 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1089 } 1090 /* overflow protection */ 1091 for (i=256;i<512;i++) { 1092 v->RtoPixel[i] = v->RtoPixel[255]; 1093 v->GtoPixel[i] = v->GtoPixel[255]; 1094 v->BtoPixel[i] = v->BtoPixel[255]; 1095 } 1096 1097 /* setup dithering kernel */ 1098 minBits = rBits; 1099 if (gBits < minBits) minBits = gBits; 1100 if (bBits < minBits) minBits = bBits; 1101 for (i=0;i<16;i++) { 1102 v->Kernel[i] = kernel[i] >> minBits; 1103 } 1104 1105 v->undithered_pf = PF_TRUECOLOR; 1106 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_TRUEDITHER : PF_TRUECOLOR; 1107 } 1108 1109 /* 1110 * Now check for TrueColor visuals which we can optimize. 1111 */ 1112 if ( GET_REDMASK(v) ==0x0000ff 1113 && GET_GREENMASK(v)==0x00ff00 1114 && GET_BLUEMASK(v) ==0xff0000 1115 && CHECK_BYTE_ORDER(v) 1116 && v->BitsPerPixel==32 1117 && sizeof(GLuint)==4 1118 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1119 /* common 32 bpp config used on SGI, Sun */ 1120 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1121 } 1122 else if (GET_REDMASK(v) ==0xff0000 1123 && GET_GREENMASK(v)==0x00ff00 1124 && GET_BLUEMASK(v) ==0x0000ff 1125 && CHECK_BYTE_ORDER(v) 1126 && v->BitsPerPixel==32 1127 && sizeof(GLuint)==4 1128 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1129 /* common 32 bpp config used on Linux, HP, IBM */ 1130 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1131 } 1132 else if (GET_REDMASK(v) ==0xff0000 1133 && GET_GREENMASK(v)==0x00ff00 1134 && GET_BLUEMASK(v) ==0x0000ff 1135 && CHECK_BYTE_ORDER(v) 1136 && v->BitsPerPixel==24 1137 && sizeof(GLuint)==4 1138 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1139 /* common packed 24 bpp config used on Linux */ 1140 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1141 } 1142 else if (GET_REDMASK(v) ==0xf800 1143 && GET_GREENMASK(v)==0x07e0 1144 && GET_BLUEMASK(v) ==0x001f 1145 && CHECK_BYTE_ORDER(v) 1146 && v->BitsPerPixel==16 1147 && sizeof(GLushort)==2 1148 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1149 /* 5-6-5 color weight on common PC VGA boards */ 1150 v->undithered_pf = PF_5R6G5B; 1151 v->dithered_pf = PF_DITHER_5R6G5B; 1152 } 1153 else if (GET_REDMASK(v) ==0xe0 1154 && GET_GREENMASK(v)==0x1c 1155 && GET_BLUEMASK(v) ==0x03 1156 && CHECK_FOR_HPCR(v)) { 1157 setup_8bit_hpcr( v ); 1158 } 1159} 1160 1161 1162 1163/* 1164 * Setup RGB rendering for a window with a monochrome visual. 1165 */ 1166static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1167{ 1168 (void) b; 1169 v->dithered_pf = v->undithered_pf = PF_1BIT; 1170 /* if black=1 then we must flip pixel values */ 1171 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1172} 1173 1174 1175 1176/* 1177 * When a context is "made current" for the first time, we can finally 1178 * finish initializing the context's visual and buffer information. 1179 * Input: v - the XMesaVisual to initialize 1180 * b - the XMesaBuffer to initialize (may be NULL) 1181 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1182 * window - the window/pixmap we're rendering into 1183 * cmap - the colormap associated with the window/pixmap 1184 * Return: GL_TRUE=success, GL_FALSE=failure 1185 */ 1186static GLboolean initialize_visual_and_buffer( int client, 1187 XMesaVisual v, 1188 XMesaBuffer b, 1189 GLboolean rgb_flag, 1190 XMesaDrawable window, 1191 XMesaColormap cmap 1192 ) 1193{ 1194#ifndef XFree86Server 1195 XGCValues gcvalues; 1196#endif 1197 1198 if (b) { 1199 assert(b->xm_visual == v); 1200 } 1201 1202 /* Save true bits/pixel */ 1203 v->BitsPerPixel = GET_BITS_PER_PIXEL(v); 1204 assert(v->BitsPerPixel > 0); 1205 1206 1207 if (rgb_flag==GL_FALSE) { 1208 /* COLOR-INDEXED WINDOW: 1209 * Even if the visual is TrueColor or DirectColor we treat it as 1210 * being color indexed. This is weird but might be useful to someone. 1211 */ 1212 v->dithered_pf = v->undithered_pf = PF_INDEX; 1213 v->index_bits = GET_VISUAL_DEPTH(v); 1214 } 1215 else { 1216 /* RGB WINDOW: 1217 * We support RGB rendering into almost any kind of visual. 1218 */ 1219 int xclass; 1220 xclass = GET_VISUAL_CLASS(v); 1221 if (xclass==TrueColor || xclass==DirectColor) { 1222 setup_truecolor( v, b, (XMesaWindow)window, cmap ); 1223 } 1224 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { 1225 setup_monochrome( v, b ); 1226 } 1227 else if (xclass==GrayScale || xclass==StaticGray) { 1228 if (!setup_grayscale( client, v, b, cmap )) { 1229 return GL_FALSE; 1230 } 1231 } 1232 else if ((xclass==PseudoColor || xclass==StaticColor) 1233 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1234 if (!setup_dithered_color( client, v, b, cmap )) { 1235 return GL_FALSE; 1236 } 1237 } 1238 else { 1239 error("XMesa: RGB mode rendering not supported in given visual."); 1240 return GL_FALSE; 1241 } 1242 v->index_bits = 0; 1243 1244 if (getenv("MESA_NO_DITHER")) { 1245 v->dithered_pf = v->undithered_pf; 1246 } 1247 } 1248 1249 1250 /* 1251 * If MESA_INFO env var is set print out some debugging info 1252 * which can help Brian figure out what's going on when a user 1253 * reports bugs. 1254 */ 1255 if (getenv("MESA_INFO")) { 1256 fprintf(stderr, "X/Mesa visual = %p\n", v); 1257 fprintf(stderr, "X/Mesa dithered pf = %u\n", v->dithered_pf); 1258 fprintf(stderr, "X/Mesa undithered pf = %u\n", v->undithered_pf); 1259 fprintf(stderr, "X/Mesa level = %d\n", v->level); 1260 fprintf(stderr, "X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1261 fprintf(stderr, "X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1262 } 1263 1264 if (b && window) { 1265 /* Do window-specific initializations */ 1266 1267 /* Window dimensions */ 1268 unsigned int w, h; 1269 get_drawable_size( v->display, window, &w, &h ); 1270 b->width = w; 1271 b->height = h; 1272 1273 b->frontbuffer = window; 1274 1275 assert( v->gl_visual ); 1276 1277 /* Setup for single/double buffering */ 1278 if (v->gl_visual->DBflag) { 1279 /* Double buffered */ 1280#ifndef XFree86Server 1281 b->shm = check_for_xshm( v->display ); 1282#endif 1283 xmesa_alloc_back_buffer( b ); 1284 if (b->db_state==BACK_PIXMAP) { 1285 b->buffer = (XMesaDrawable)b->backpixmap; 1286 } 1287 else { 1288 b->buffer = XIMAGE; 1289 } 1290 } 1291 else { 1292 /* Single Buffered */ 1293 b->buffer = b->frontbuffer; 1294 } 1295 1296 /* X11 graphics contexts */ 1297#ifdef XFree86Server 1298 b->gc1 = CreateScratchGC(v->display, window->depth); 1299 b->gc2 = CreateScratchGC(v->display, window->depth); 1300#else 1301 b->gc1 = XCreateGC( v->display, window, 0, NULL ); 1302 b->gc2 = XCreateGC( v->display, window, 0, NULL ); 1303#endif 1304 XMesaSetFunction( v->display, b->gc1, GXcopy ); 1305 XMesaSetFunction( v->display, b->gc2, GXcopy ); 1306 1307 /* 1308 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1309 * Patch contributed by Michael Pichler May 15, 1995. 1310 */ 1311#ifdef XFree86Server 1312 b->cleargc = CreateScratchGC(v->display, window->depth); 1313 { 1314 CARD32 v[1]; 1315 v[0] = FALSE; 1316 dixChangeGC(NullClient, b->cleargc, GCGraphicsExposures, v, NULL); 1317 } 1318#else 1319 gcvalues.graphics_exposures = False; 1320 b->cleargc = XCreateGC( v->display, window, 1321 GCGraphicsExposures, &gcvalues); 1322#endif 1323 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1324 /* 1325 * Set fill style and tile pixmap once for all for HPCR stuff 1326 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1327 * Initialize whole stuff 1328 * Patch contributed by Jacques Leroy March 8, 1998. 1329 */ 1330 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1331 int i; 1332 for (i=0; i<16; i++) 1333 { 1334 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1335 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1336 } 1337 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1338 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1339 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1340 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1341 } 1342 1343 /* Initialize the row buffer XImage for use in write_color_span() */ 1344#ifdef XFree86Server 1345 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1346 (char *)MALLOC(MAX_WIDTH*4)); 1347#else 1348 b->rowimage = XCreateImage( v->display, 1349 v->visinfo->visual, 1350 v->visinfo->depth, 1351 ZPixmap, 0, /*format, offset*/ 1352 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1353 MAX_WIDTH, 1, /*width, height*/ 1354 32, /*bitmap_pad*/ 1355 0 /*bytes_per_line*/ ); 1356#endif 1357 } 1358 1359 return GL_TRUE; 1360} 1361 1362 1363 1364/* 1365 * Convert an RGBA color to a pixel value. 1366 */ 1367unsigned long 1368xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1369 GLuint pixelFormat) 1370{ 1371 switch (pixelFormat) { 1372 case PF_INDEX: 1373 return 0; 1374 case PF_TRUECOLOR: 1375 { 1376 unsigned long p; 1377 PACK_TRUECOLOR( p, r, g, b ); 1378 return p; 1379 } 1380 case PF_8A8B8G8R: 1381 return PACK_8A8B8G8R( r, g, b, a ); 1382 case PF_8R8G8B: 1383 /* fall through */ 1384 case PF_8R8G8B24: 1385 return PACK_8R8G8B( r, g, b ); 1386 case PF_5R6G5B: 1387 return PACK_5R6G5B( r, g, b ); 1388 case PF_DITHER: 1389 { 1390 DITHER_SETUP; 1391 return DITHER( 1, 0, r, g, b ); 1392 } 1393 case PF_1BIT: 1394 /* 382 = (3*255)/2 */ 1395 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1396 case PF_HPCR: 1397 return DITHER_HPCR(1, 1, r, g, b); 1398 case PF_LOOKUP: 1399 { 1400 LOOKUP_SETUP; 1401 return LOOKUP( r, g, b ); 1402 } 1403 case PF_GRAYSCALE: 1404 return GRAY_RGB( r, g, b ); 1405 case PF_TRUEDITHER: 1406 /* fall through */ 1407 case PF_DITHER_5R6G5B: 1408 { 1409 unsigned long p; 1410 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1411 return p; 1412 } 1413 default: 1414 gl_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1415 } 1416 return 0; 1417} 1418 1419 1420/**********************************************************************/ 1421/***** Public Functions *****/ 1422/**********************************************************************/ 1423 1424 1425/* 1426 * Create a new X/Mesa visual. 1427 * Input: display - X11 display 1428 * visinfo - an XVisualInfo pointer 1429 * rgb_flag - GL_TRUE = RGB mode, 1430 * GL_FALSE = color index mode 1431 * alpha_flag - alpha buffer requested? 1432 * db_flag - GL_TRUE = double-buffered, 1433 * GL_FALSE = single buffered 1434 * stereo_flag - stereo visual? 1435 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1436 * GL_FALSE = use an off-screen pixmap for back buffer 1437 * depth_size - requested bits/depth values, or zero 1438 * stencil_size - requested bits/stencil values, or zero 1439 * accum_red_size - requested bits/red accum values, or zero 1440 * accum_green_size - requested bits/green accum values, or zero 1441 * accum_blue_size - requested bits/blue accum values, or zero 1442 * accum_alpha_size - requested bits/alpha accum values, or zero 1443 * num_samples - number of samples/pixel if multisampling, or zero 1444 * level - visual level, usually 0 1445 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT 1446 * Return; a new XMesaVisual or 0 if error. 1447 */ 1448XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1449 XMesaVisualInfo visinfo, 1450 GLboolean rgb_flag, 1451 GLboolean alpha_flag, 1452 GLboolean db_flag, 1453 GLboolean stereo_flag, 1454 GLboolean ximage_flag, 1455 GLint depth_size, 1456 GLint stencil_size, 1457 GLint accum_red_size, 1458 GLint accum_green_size, 1459 GLint accum_blue_size, 1460 GLint accum_alpha_size, 1461 GLint num_samples, 1462 GLint level, 1463 GLint visualCaveat ) 1464{ 1465 char *gamma; 1466 XMesaVisual v; 1467 GLint red_bits, green_bits, blue_bits, alpha_bits; 1468 1469 /* For debugging only */ 1470 if (getenv("MESA_XSYNC")) { 1471 /* This makes debugging X easier. 1472 * In your debugger, set a breakpoint on _XError to stop when an 1473 * X protocol error is generated. 1474 */ 1475#ifdef XFree86Server 1476 /* NOT_NEEDED */ 1477#else 1478 XSynchronize( display, 1 ); 1479#endif 1480 } 1481 1482 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1483 if (!v) { 1484 return NULL; 1485 } 1486 1487 /* 1488 * In the X server, NULL is passed in for the display. It will have 1489 * to be set before using this visual. See XMesaSetVisualDisplay() 1490 * below. 1491 */ 1492 v->display = display; 1493 1494 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1495 * the struct but we may need some of the information contained in it 1496 * at a later time. 1497 */ 1498#ifdef XFree86Server 1499 v->visinfo = visinfo; 1500#else 1501 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1502 if(!v->visinfo) { 1503 FREE(v); 1504 return NULL; 1505 } 1506 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1507 1508 /* Save a copy of the pointer now so we can find this visual again 1509 * if we need to search for it in find_glx_visual(). 1510 */ 1511 v->vishandle = visinfo; 1512#endif 1513 1514#ifdef XFree86Server 1515 /* Initialize the depth of the screen */ 1516 { 1517 PixmapFormatRec *format; 1518 1519 for (format = screenInfo.formats; 1520 format->depth != display->rootDepth; 1521 format++) 1522 ; 1523 v->screen_depth = format->bitsPerPixel; 1524 } 1525#endif 1526 1527 /* check for MESA_GAMMA environment variable */ 1528 gamma = getenv("MESA_GAMMA"); 1529 if (gamma) { 1530 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1531 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1532 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1533 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1534 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1535 } 1536 else { 1537 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1538 } 1539 1540 v->ximage_flag = ximage_flag; 1541 v->level = level; 1542 v->VisualCaveat = visualCaveat; 1543 1544 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1545 1546 { 1547 int xclass; 1548 xclass = GET_VISUAL_CLASS(v); 1549 if (xclass==TrueColor || xclass==DirectColor) { 1550 red_bits = bitcount(GET_REDMASK(v)); 1551 green_bits = bitcount(GET_GREENMASK(v)); 1552 blue_bits = bitcount(GET_BLUEMASK(v)); 1553 alpha_bits = 0; 1554 } 1555 else { 1556 /* this is an approximation */ 1557 int depth; 1558 depth = GET_VISUAL_DEPTH(v); 1559 red_bits = depth / 3; 1560 depth -= red_bits; 1561 green_bits = depth / 2; 1562 depth -= green_bits; 1563 blue_bits = depth; 1564 alpha_bits = 0; 1565 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1566 } 1567 } 1568 1569 if (alpha_flag && alpha_bits == 0) 1570 alpha_bits = 8; 1571 1572 v->gl_visual = _mesa_create_visual( rgb_flag, db_flag, stereo_flag, 1573 red_bits, green_bits, 1574 blue_bits, alpha_bits, 1575 v->index_bits, 1576 depth_size, 1577 stencil_size, 1578 accum_red_size, accum_green_size, 1579 accum_blue_size, accum_alpha_size, 1580 0 ); 1581 if (!v->gl_visual) { 1582#ifndef XFree86Server 1583 FREE(v->visinfo); 1584#endif 1585 FREE(v); 1586 return NULL; 1587 } 1588 1589 return v; 1590} 1591 1592 1593void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1594{ 1595 v->display = dpy; 1596} 1597 1598 1599void XMesaDestroyVisual( XMesaVisual v ) 1600{ 1601 _mesa_destroy_visual( v->gl_visual ); 1602#ifndef XFree86Server 1603 FREE(v->visinfo); 1604#endif 1605 FREE(v); 1606} 1607 1608 1609 1610/* 1611 * Create a new XMesaContext. 1612 * Input: v - XMesaVisual 1613 * share_list - another XMesaContext with which to share display 1614 * lists or NULL if no sharing is wanted. 1615 * Return: an XMesaContext or NULL if error. 1616 */ 1617XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1618{ 1619 XMesaContext c; 1620 GLcontext *ctx; 1621 GLboolean direct = GL_TRUE; /* XXXX */ 1622 /* NOT_DONE: should this be GL_FALSE??? */ 1623 static GLboolean firstTime = GL_TRUE; 1624 1625 if (firstTime) { 1626 _glthread_INIT_MUTEX(_xmesa_lock); 1627 firstTime = GL_FALSE; 1628 } 1629 1630 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1631 if (!c) { 1632 return NULL; 1633 } 1634 1635 ctx = c->gl_ctx = _mesa_create_context( v->gl_visual, 1636 share_list ? share_list->gl_ctx : (GLcontext *) NULL, 1637 (void *) c, direct ); 1638 if (!c->gl_ctx) { 1639 FREE(c); 1640 return NULL; 1641 } 1642 1643 gl_extensions_enable(ctx, "GL_HP_occlusion_test"); 1644 gl_extensions_enable(ctx, "GL_ARB_texture_cube_map"); 1645 gl_extensions_enable(ctx, "GL_EXT_texture_env_combine"); 1646 1647 if (CHECK_BYTE_ORDER(v)) { 1648 c->swapbytes = GL_FALSE; 1649 } 1650 else { 1651 c->swapbytes = GL_TRUE; 1652 } 1653 1654 c->xm_visual = v; 1655 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1656 c->display = v->display; 1657 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1658 1659 ctx->Driver.UpdateState = xmesa_update_state; 1660 ctx->Driver.UpdateStateNotify = ~0; 1661 1662#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1663 c->driContextPriv = driContextPriv; 1664#endif 1665 1666 /* Set up some constant pointers: 1667 */ 1668 xmesa_init_pointers( ctx ); 1669 1670 if (ctx->VB) 1671 _swsetup_RegisterVB( ctx->VB ); 1672 1673 1674 /* Initialize the software rasterizer and helper modules. 1675 */ 1676 _swrast_CreateContext( ctx ); 1677 _swsetup_CreateContext( ctx ); 1678 1679 xmesa_register_swrast_functions( ctx ); 1680 1681 /* Run the config file 1682 */ 1683 _mesa_context_initialize( ctx ); 1684 1685 1686 return c; 1687} 1688 1689 1690 1691 1692void XMesaDestroyContext( XMesaContext c ) 1693{ 1694#ifdef FX 1695 if (c->xm_buffer && c->xm_buffer->FXctx) 1696 fxMesaDestroyContext(c->xm_buffer->FXctx); 1697#endif 1698 if (c->gl_ctx) { 1699 _swsetup_DestroyContext( c->gl_ctx ); 1700 _swrast_DestroyContext( c->gl_ctx ); 1701 _mesa_destroy_context( c->gl_ctx ); 1702 } 1703 1704 /* Disassociate old buffer with this context */ 1705 if (c->xm_buffer) 1706 c->xm_buffer->xm_context = NULL; 1707 1708 /* Destroy any buffers which are using this context. If we don't 1709 * we may have dangling references. Hmm, maybe we should just 1710 * set the buffer's context pointer to NULL instead of deleting it? 1711 * Let's see if we get any bug reports... 1712 * This contributed by Doug Rabson <dfr@calcaphon.com> 1713 */ 1714 { 1715 XMesaBuffer b, next; 1716 for (b = XMesaBufferList; b; b = next) { 1717 next = b->Next; 1718 if (!b->pixmap_flag) { 1719#ifndef XFree86Server 1720 XSync(b->display, False); 1721#endif 1722 if (b->xm_context == c) { 1723 /* found a context created for this context */ 1724 XMesaDestroyBuffer( b ); 1725 } 1726 } 1727 } 1728 } 1729 1730 FREE( c ); 1731} 1732 1733 1734 1735/* 1736 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1737 * Create a new XMesaBuffer from an X window. 1738 * Input: v - the XMesaVisual 1739 * w - the window 1740 * c - the context 1741 * Return: new XMesaBuffer or NULL if error 1742 */ 1743XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1744 XMesaContext c ) 1745{ 1746#ifndef XFree86Server 1747 XWindowAttributes attr; 1748#endif 1749#ifdef FX 1750 char *fxEnvVar; 1751#endif 1752 int client = 0; 1753 1754 XMesaBuffer b = alloc_xmesa_buffer(); 1755 if (!b) { 1756 return NULL; 1757 } 1758 1759 (void) c; 1760 1761#ifdef XFree86Server 1762 client = CLIENT_ID(((XMesaDrawable)w)->id); 1763#endif 1764 1765 assert(v); 1766 1767#ifdef XFree86Server 1768 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1769#else 1770 XGetWindowAttributes( v->display, w, &attr ); 1771 1772 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1773#endif 1774 if (getenv("MESA_DEBUG")) { 1775 fprintf(stderr, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1776 } 1777 return NULL; 1778 } 1779 1780 b->xm_context = NULL; /* Associate no context with this buffer */ 1781 1782 b->xm_visual = v; 1783 b->pixmap_flag = GL_FALSE; 1784 b->display = v->display; 1785#ifdef XFree86Server 1786 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1787#else 1788 if (attr.colormap) { 1789 b->cmap = attr.colormap; 1790 } 1791 else { 1792 if (getenv("MESA_DEBUG")) { 1793 fprintf(stderr, "Window %u has no colormap!\n", (unsigned int) w); 1794 } 1795 /* this is weird, a window w/out a colormap!? */ 1796 /* OK, let's just allocate a new one and hope for the best */ 1797 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1798 } 1799#endif 1800 1801 /* determine back buffer implementation */ 1802 if (v->gl_visual->DBflag) { 1803 if (v->ximage_flag) { 1804 b->db_state = BACK_XIMAGE; 1805 } 1806 else { 1807 b->db_state = BACK_PIXMAP; 1808 } 1809 } 1810 else { 1811 b->db_state = 0; 1812 } 1813 1814 b->gl_buffer = _mesa_create_framebuffer( v->gl_visual, 1815 v->gl_visual->DepthBits > 0, 1816 v->gl_visual->StencilBits > 0, 1817 v->gl_visual->AccumRedBits > 0, 1818 v->gl_visual->AlphaBits > 0 ); 1819 if (!b->gl_buffer) { 1820 free_xmesa_buffer(client, b); 1821 return NULL; 1822 } 1823 1824 if (!initialize_visual_and_buffer( client, v, b, v->gl_visual->RGBAflag, 1825 (XMesaDrawable)w, b->cmap )) { 1826 _mesa_destroy_framebuffer( b->gl_buffer ); 1827 free_xmesa_buffer(client, b); 1828 return NULL; 1829 } 1830 1831#ifdef FX 1832 fxEnvVar = getenv("MESA_GLX_FX"); 1833 if (fxEnvVar) { 1834 if (fxEnvVar[0]!='d') { 1835 int attribs[100]; 1836 int numAttribs = 0; 1837 int hw; 1838 if (v->gl_visual->DepthBits > 0) { 1839 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1840 attribs[numAttribs++] = 1; 1841 } 1842 if (v->gl_visual->DBflag) { 1843 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1844 } 1845 if (v->gl_visual->AccumRedBits > 0) { 1846 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1847 attribs[numAttribs++] = v->gl_visual->AccumRedBits; 1848 } 1849 if (v->gl_visual->StencilBits > 0) { 1850 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1851 attribs[numAttribs++] = v->gl_visual->StencilBits; 1852 } 1853 if (v->gl_visual->AlphaBits > 0) { 1854 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1855 attribs[numAttribs++] = 1; 1856 } 1857 if (c->gl_ctx) { 1858#define FXMESA_SHARE_CONTEXT 990099 /* keep in sync with fxapi.c! */ 1859 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1860 attribs[numAttribs++] = (int) c->gl_ctx; 1861 } 1862 attribs[numAttribs++] = FXMESA_NONE; 1863 1864 if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) { 1865 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1866 if ((v->undithered_pf!=PF_INDEX) && (b->backimage)) { 1867 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1868 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1869 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1870 else 1871 b->FXwindowHack = GL_FALSE; 1872 } 1873 } 1874 else { 1875 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1876 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1877 GR_REFRESH_75Hz, attribs); 1878 else 1879 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1880 b->FXisHackUsable = GL_FALSE; 1881 b->FXwindowHack = GL_FALSE; 1882 } 1883 /* 1884 fprintf(stderr, 1885 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1886 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1887 */ 1888 } 1889 } 1890 else { 1891 fprintf(stderr,"WARNING: This Mesa Library includes the Glide driver but\n"); 1892 fprintf(stderr," you have not defined the MESA_GLX_FX env. var.\n"); 1893 fprintf(stderr," (check the README.3DFX file for more information).\n\n"); 1894 fprintf(stderr," you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1895 } 1896#endif 1897 1898#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1899 b->driDrawPriv = driDrawPriv; 1900#endif 1901 1902 return b; 1903} 1904 1905 1906XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1907{ 1908 return XMesaCreateWindowBuffer2( v, w, NULL ); 1909} 1910 1911 1912/* 1913 * Create a new XMesaBuffer from an X pixmap. 1914 * Input: v - the XMesaVisual 1915 * p - the pixmap 1916 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor 1917 * visual for the pixmap 1918 * Return: new XMesaBuffer or NULL if error 1919 */ 1920XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1921 XMesaPixmap p, XMesaColormap cmap ) 1922{ 1923 int client = 0; 1924 XMesaBuffer b = alloc_xmesa_buffer(); 1925 if (!b) { 1926 return NULL; 1927 } 1928 1929 1930#ifdef XFree86Server 1931 client = CLIENT_ID(((XMesaDrawable)p)->id); 1932#endif 1933 1934 assert(v); 1935 1936 b->xm_context = NULL; /* Associate no context with this buffer */ 1937 1938 b->xm_visual = v; 1939 b->pixmap_flag = GL_TRUE; 1940 b->display = v->display; 1941 b->cmap = cmap; 1942 1943 /* determine back buffer implementation */ 1944 if (v->gl_visual->DBflag) { 1945 if (v->ximage_flag) { 1946 b->db_state = BACK_XIMAGE; 1947 } 1948 else { 1949 b->db_state = BACK_PIXMAP; 1950 } 1951 } 1952 else { 1953 b->db_state = 0; 1954 } 1955 1956 b->gl_buffer = _mesa_create_framebuffer( v->gl_visual, 1957 v->gl_visual->DepthBits > 0, 1958 v->gl_visual->StencilBits > 0, 1959 v->gl_visual->AccumRedBits + 1960 v->gl_visual->AccumGreenBits + 1961 v->gl_visual->AccumBlueBits > 0, 1962 v->gl_visual->AlphaBits > 0 ); 1963 if (!b->gl_buffer) { 1964 free_xmesa_buffer(client, b); 1965 return NULL; 1966 } 1967 1968 if (!initialize_visual_and_buffer(client, v, b, v->gl_visual->RGBAflag, 1969 (XMesaDrawable)p, cmap)) { 1970 _mesa_destroy_framebuffer( b->gl_buffer ); 1971 free_xmesa_buffer(client, b); 1972 return NULL; 1973 } 1974 1975#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 1976 b->driDrawPriv = driDrawPriv; 1977#endif 1978 1979 return b; 1980} 1981 1982 1983 1984/* 1985 * Deallocate an XMesaBuffer structure and all related info. 1986 */ 1987void XMesaDestroyBuffer( XMesaBuffer b ) 1988{ 1989 int client = 0; 1990 1991#ifdef XFree86Server 1992 if (b->frontbuffer) 1993 client = CLIENT_ID(b->frontbuffer->id); 1994#endif 1995 1996 if (b->gc1) XMesaFreeGC( b->xm_visual->display, b->gc1 ); 1997 if (b->gc2) XMesaFreeGC( b->xm_visual->display, b->gc2 ); 1998 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1999 2000 if (b->backimage) { 2001#if defined(USE_XSHM) && !defined(XFree86Server) 2002 if (b->shm) { 2003 XShmDetach( b->xm_visual->display, &b->shminfo ); 2004 XDestroyImage( b->backimage ); 2005 shmdt( b->shminfo.shmaddr ); 2006 } 2007 else 2008#endif 2009 XMesaDestroyImage( b->backimage ); 2010 } 2011 if (b->backpixmap) { 2012 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 2013 if (b->xm_visual->hpcr_clear_flag) { 2014 XMesaFreePixmap( b->xm_visual->display, 2015 b->xm_visual->hpcr_clear_pixmap ); 2016 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 2017 } 2018 } 2019 if (b->rowimage) { 2020 FREE( b->rowimage->data ); 2021 b->rowimage->data = NULL; 2022 XMesaDestroyImage( b->rowimage ); 2023 } 2024 2025 if (b->xm_context) 2026 b->xm_context->xm_buffer = NULL; 2027 2028 _mesa_destroy_framebuffer( b->gl_buffer ); 2029 free_xmesa_buffer(client, b); 2030} 2031 2032 2033 2034/* 2035 * Bind buffer b to context c and make c the current rendering context. 2036 */ 2037GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2038{ 2039 return XMesaMakeCurrent2( c, b, b ); 2040} 2041 2042 2043/* 2044 * Bind buffer b to context c and make c the current rendering context. 2045 */ 2046GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2047 XMesaBuffer readBuffer ) 2048{ 2049 if (c) { 2050 if (!drawBuffer || !readBuffer) 2051 return GL_FALSE; /* must specify buffers! */ 2052 2053#ifdef FX 2054 if (drawBuffer->FXctx) { 2055 fxMesaMakeCurrent(drawBuffer->FXctx); 2056 2057 /* Disassociate old buffer from this context */ 2058 if (c->xm_buffer) 2059 c->xm_buffer->xm_context = NULL; 2060 2061 /* Associate the context with this buffer */ 2062 drawBuffer->xm_context = c; 2063 2064 c->xm_buffer = drawBuffer; 2065 c->xm_read_buffer = readBuffer; 2066 c->use_read_buffer = (drawBuffer != readBuffer); 2067 2068 return GL_TRUE; 2069 } 2070#endif 2071 if (c->gl_ctx == _mesa_get_current_context() 2072 && c->xm_buffer == drawBuffer 2073 && c->xm_read_buffer == readBuffer 2074 && c->xm_buffer->wasCurrent) { 2075 /* same context and buffer, do nothing */ 2076 return GL_TRUE; 2077 } 2078 2079 /* Disassociate old buffer with this context */ 2080 if (c->xm_buffer) 2081 c->xm_buffer->xm_context = NULL; 2082 drawBuffer->xm_context = c; /* Associate the context with this buffer */ 2083 2084 c->xm_buffer = drawBuffer; 2085 c->xm_read_buffer = readBuffer; 2086 c->use_read_buffer = (drawBuffer != readBuffer); 2087 2088 _mesa_make_current2(c->gl_ctx, drawBuffer->gl_buffer, readBuffer->gl_buffer); 2089 2090 if (c->gl_ctx->Viewport.Width == 0) { 2091 /* initialize viewport to window size */ 2092 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2093 c->gl_ctx->Scissor.Width = drawBuffer->width; 2094 c->gl_ctx->Scissor.Height = drawBuffer->height; 2095 } 2096 2097 if (c->xm_visual->gl_visual->RGBAflag) { 2098 /* 2099 * Must recompute and set these pixel values because colormap 2100 * can be different for different windows. 2101 */ 2102 c->pixel = xmesa_color_to_pixel( c, c->red, c->green, 2103 c->blue, c->alpha, c->pixelformat ); 2104 XMesaSetForeground( c->display, c->xm_buffer->gc1, c->pixel ); 2105 c->clearpixel = xmesa_color_to_pixel( c, 2106 c->clearcolor[0], 2107 c->clearcolor[1], 2108 c->clearcolor[2], 2109 c->clearcolor[3], 2110 c->xm_visual->undithered_pf); 2111 XMesaSetForeground(c->display, c->xm_buffer->cleargc, c->clearpixel); 2112 } 2113 2114 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2115 c->xm_buffer->wasCurrent = GL_TRUE; 2116 } 2117 else { 2118 /* Detach */ 2119 _mesa_make_current2( NULL, NULL, NULL ); 2120 } 2121 return GL_TRUE; 2122} 2123 2124 2125/* 2126 * Unbind the context c from its buffer. 2127 */ 2128GLboolean XMesaUnbindContext( XMesaContext c ) 2129{ 2130 /* A no-op for XFree86 integration purposes */ 2131 return GL_TRUE; 2132} 2133 2134 2135XMesaContext XMesaGetCurrentContext( void ) 2136{ 2137 GET_CURRENT_CONTEXT(ctx); 2138 if (ctx) { 2139 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2140 return xmesa; 2141 } 2142 else { 2143 return 0; 2144 } 2145} 2146 2147 2148XMesaBuffer XMesaGetCurrentBuffer( void ) 2149{ 2150 GET_CURRENT_CONTEXT(ctx); 2151 if (ctx) { 2152 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2153 return xmesa->xm_buffer; 2154 } 2155 else { 2156 return 0; 2157 } 2158} 2159 2160 2161/* New in Mesa 3.1 */ 2162XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2163{ 2164 GET_CURRENT_CONTEXT(ctx); 2165 if (ctx) { 2166 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2167 return xmesa->xm_buffer; 2168 } 2169 else { 2170 return 0; 2171 } 2172} 2173 2174 2175GLboolean XMesaForceCurrent(XMesaContext c) 2176{ 2177 if (c) { 2178 if (c->gl_ctx != _mesa_get_current_context()) { 2179 _mesa_make_current(c->gl_ctx, c->xm_buffer->gl_buffer); 2180 } 2181 } 2182 else { 2183 _mesa_make_current(NULL, NULL); 2184 } 2185 return GL_TRUE; 2186} 2187 2188 2189GLboolean XMesaLoseCurrent(XMesaContext c) 2190{ 2191 (void) c; 2192 _mesa_make_current(NULL, NULL); 2193 return GL_TRUE; 2194} 2195 2196 2197/* 2198 * Switch 3Dfx support hack between window and full-screen mode. 2199 */ 2200GLboolean XMesaSetFXmode( GLint mode ) 2201{ 2202#ifdef FX 2203 const char *fx = getenv("MESA_GLX_FX"); 2204 if (fx && fx[0] != 'd') { 2205 GET_CURRENT_CONTEXT(ctx); 2206 GrHwConfiguration hw; 2207 if (!FX_grSstQueryHardware(&hw)) { 2208 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2209 return GL_FALSE; 2210 } 2211 if (hw.num_sst < 1) { 2212 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2213 return GL_FALSE; 2214 } 2215 if (ctx) { 2216 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2217 if (mode == XMESA_FX_WINDOW) { 2218 if (xmesa->xm_buffer->FXisHackUsable) { 2219 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2220 xmesa->xm_buffer->FXwindowHack = GL_TRUE; 2221 return GL_TRUE; 2222 } 2223 } 2224 else if (mode == XMESA_FX_FULLSCREEN) { 2225 FX_grSstControl(GR_CONTROL_ACTIVATE); 2226 xmesa->xm_buffer->FXwindowHack = GL_FALSE; 2227 return GL_TRUE; 2228 } 2229 else { 2230 /* Error: Bad mode value */ 2231 } 2232 } 2233 } 2234 /*fprintf(stderr, "fallthrough\n");*/ 2235#else 2236 (void) mode; 2237#endif 2238 return GL_FALSE; 2239} 2240 2241 2242 2243#ifdef FX 2244/* 2245 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2246 */ 2247static void FXgetImage( XMesaBuffer b ) 2248{ 2249 static unsigned short pixbuf[MAX_WIDTH]; 2250 int x, y; 2251 XMesaWindow root; 2252 unsigned int bw, depth, width, height; 2253 XMesaContext xmesa = (XMesaContext) b->xm_context->gl_ctx->DriverCtx; 2254 2255 assert(xmesa->xm_buffer->FXctx); 2256 2257#ifdef XFree86Server 2258 x = b->frontbuffer->x; 2259 y = b->frontbuffer->y; 2260 width = b->frontbuffer->width; 2261 height = b->frontbuffer->height; 2262 depth = b->frontbuffer->depth; 2263#else 2264 XGetGeometry( xmesa->xm_visual->display, b->frontbuffer, 2265 &root, &x, &y, &width, &height, &bw, &depth); 2266#endif 2267 if (b->width != width || b->height != height) { 2268 b->width = MIN2((int)width, xmesa->xm_buffer->FXctx->width); 2269 b->height = MIN2((int)height, xmesa->xm_buffer->FXctx->height); 2270 if (b->width & 1) 2271 b->width--; /* prevent odd width */ 2272 xmesa_alloc_back_buffer( b ); 2273 } 2274 2275 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2276 if (xmesa->xm_visual->undithered_pf==PF_5R6G5B) { 2277 /* Special case: 16bpp RGB */ 2278 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2279 0, xmesa->xm_buffer->FXctx->height - b->height, /*pos*/ 2280 b->width, b->height, /* size */ 2281 b->width * sizeof(GLushort), /* stride */ 2282 b->backimage->data); /* dest buffer */ 2283 } 2284 else if (xmesa->xm_visual->dithered_pf==PF_DITHER 2285 && GET_VISUAL_DEPTH(xmesa->xm_visual)==8) { 2286 /* Special case: 8bpp RGB */ 2287 for (y=0;y<b->height;y++) { 2288 GLubyte *ptr = (GLubyte*) xmesa->xm_buffer->backimage->data 2289 + xmesa->xm_buffer->backimage->bytes_per_line * y; 2290 XDITHER_SETUP(y); 2291 2292 /* read row from 3Dfx frame buffer */ 2293 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2294 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2295 b->width, 1, 2296 0, 2297 pixbuf ); 2298 2299 /* write to XImage back buffer */ 2300 for (x=0;x<b->width;x++) { 2301 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2302 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2303 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2304 *ptr++ = XDITHER( x, r, g, b); 2305 } 2306 } 2307 } 2308 else { 2309 /* General case: slow! */ 2310 for (y=0;y<b->height;y++) { 2311 /* read row from 3Dfx frame buffer */ 2312 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2313 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2314 b->width, 1, 2315 0, 2316 pixbuf ); 2317 2318 /* write to XImage back buffer */ 2319 for (x=0;x<b->width;x++) { 2320 XMesaPutPixel(b->backimage,x,y, 2321 xmesa_color_to_pixel(xmesa, 2322 (pixbuf[x] & 0xf800) >> 8, 2323 (pixbuf[x] & 0x07e0) >> 3, 2324 (pixbuf[x] & 0x001f) << 3, 2325 0xff, xmesa->pixelformat)); 2326 } 2327 } 2328 } 2329 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2330} 2331#endif 2332 2333 2334/* 2335 * Copy the back buffer to the front buffer. If there's no back buffer 2336 * this is a no-op. 2337 */ 2338void XMesaSwapBuffers( XMesaBuffer b ) 2339{ 2340 GET_CURRENT_CONTEXT(ctx); 2341 2342 /* If we're swapping the buffer associated with the current context 2343 * we have to flush any pending rendering commands first. 2344 */ 2345 if (b->xm_context && b->xm_context->gl_ctx == ctx) 2346 _mesa_swapbuffers(ctx); 2347 2348 if (b->db_state) { 2349#ifdef FX 2350 if (b->FXctx) { 2351 fxMesaSwapBuffers(); 2352 2353 if (b->FXwindowHack) 2354 FXgetImage(b); 2355 else 2356 return; 2357 } 2358#endif 2359 if (b->backimage) { 2360 /* Copy Ximage from host's memory to server's window */ 2361#if defined(USE_XSHM) && !defined(XFree86Server) 2362 if (b->shm) { 2363 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2364 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2365 b->cleargc, 2366 b->backimage, 0, 0, 2367 0, 0, b->width, b->height, False ); 2368 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2369 } 2370 else 2371#endif 2372 { 2373#if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 2374 XMesaDriSwapBuffers( b ); 2375#else 2376 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2377 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2378 b->cleargc, 2379 b->backimage, 0, 0, 2380 0, 0, b->width, b->height ); 2381 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2382#endif 2383 } 2384 } 2385 else { 2386 /* Copy pixmap to window on server */ 2387 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2388 XMesaCopyArea( b->xm_visual->display, 2389 b->backpixmap, /* source drawable */ 2390 b->frontbuffer, /* dest. drawable */ 2391 b->cleargc, 2392 0, 0, b->width, b->height, /* source region */ 2393 0, 0 /* dest region */ 2394 ); 2395 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2396 } 2397 } 2398#if !defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server) 2399 XSync( b->xm_visual->display, False ); 2400#endif 2401} 2402 2403 2404 2405/* 2406 * Copy sub-region of back buffer to front buffer 2407 */ 2408void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2409{ 2410 GET_CURRENT_CONTEXT(ctx); 2411 2412 /* If we're swapping the buffer associated with the current context 2413 * we have to flush any pending rendering commands first. 2414 */ 2415 if (b->xm_context->gl_ctx == ctx) 2416 _mesa_swapbuffers(ctx); 2417 2418 if (b->db_state) { 2419 int yTop = b->bottom - y - height; 2420#ifdef FX 2421 if (b->FXctx) { 2422 fxMesaSwapBuffers(); 2423 if (b->FXwindowHack) 2424 FXgetImage(b); 2425 else 2426 return; 2427 } 2428#endif 2429 if (b->backimage) { 2430 /* Copy Ximage from host's memory to server's window */ 2431#if defined(USE_XSHM) && !defined(XFree86Server) 2432 if (b->shm) { 2433 /* XXX assuming width and height aren't too large! */ 2434 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2435 b->cleargc, 2436 b->backimage, x, yTop, 2437 x, yTop, width, height, False ); 2438 /* wait for finished event??? */ 2439 } 2440 else 2441#endif 2442 { 2443 /* XXX assuming width and height aren't too large! */ 2444 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2445 b->cleargc, 2446 b->backimage, x, yTop, 2447 x, yTop, width, height ); 2448 } 2449 } 2450 else { 2451 /* Copy pixmap to window on server */ 2452 XMesaCopyArea( b->xm_visual->display, 2453 b->backpixmap, /* source drawable */ 2454 b->frontbuffer, /* dest. drawable */ 2455 b->cleargc, 2456 x, yTop, width, height, /* source region */ 2457 x, yTop /* dest region */ 2458 ); 2459 } 2460 } 2461} 2462 2463 2464/* 2465 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2466 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2467 * back buffer directly. 2468 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2469 * ximage - pointer to back buffer's XImage, or NULL 2470 * Return: GL_TRUE = context is double buffered 2471 * GL_FALSE = context is single buffered 2472 */ 2473GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2474 XMesaPixmap *pixmap, 2475 XMesaImage **ximage ) 2476{ 2477 if (b->db_state) { 2478 if (pixmap) *pixmap = b->backpixmap; 2479 if (ximage) *ximage = b->backimage; 2480 return GL_TRUE; 2481 } 2482 else { 2483 *pixmap = 0; 2484 *ximage = NULL; 2485 return GL_FALSE; 2486 } 2487} 2488 2489 2490/* 2491 * Return the depth buffer associated with an XMesaBuffer. 2492 * Input: b - the XMesa buffer handle 2493 * Output: width, height - size of buffer in pixels 2494 * bytesPerValue - bytes per depth value (2 or 4) 2495 * buffer - pointer to depth buffer values 2496 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2497 */ 2498GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2499 GLint *bytesPerValue, void **buffer ) 2500{ 2501 if ((!b->gl_buffer) || (!b->gl_buffer->DepthBuffer)) { 2502 *width = 0; 2503 *height = 0; 2504 *bytesPerValue = 0; 2505 *buffer = 0; 2506 return GL_FALSE; 2507 } 2508 else { 2509 *width = b->gl_buffer->Width; 2510 *height = b->gl_buffer->Height; 2511 *bytesPerValue = sizeof(GLdepth); 2512 *buffer = b->gl_buffer->DepthBuffer; 2513 return GL_TRUE; 2514 } 2515} 2516 2517 2518void XMesaFlush( XMesaContext c ) 2519{ 2520 if (c && c->xm_visual) { 2521#ifdef XFree86Server 2522 /* NOT_NEEDED */ 2523#else 2524 XSync( c->xm_visual->display, False ); 2525#endif 2526 } 2527} 2528 2529 2530 2531const char *XMesaGetString( XMesaContext c, int name ) 2532{ 2533 (void) c; 2534 if (name==XMESA_VERSION) { 2535 return "3.1"; 2536 } 2537 else if (name==XMESA_EXTENSIONS) { 2538 return ""; 2539 } 2540 else { 2541 return NULL; 2542 } 2543} 2544 2545 2546 2547XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2548{ 2549 XMesaBuffer b; 2550 for (b=XMesaBufferList; b; b=b->Next) { 2551 if (b->frontbuffer==d && b->display==dpy) { 2552 return b; 2553 } 2554 } 2555 return NULL; 2556} 2557 2558 2559 2560/* 2561 * Look for XMesaBuffers whose X window has been destroyed. 2562 * Deallocate any such XMesaBuffers. 2563 */ 2564void XMesaGarbageCollect( void ) 2565{ 2566 XMesaBuffer b, next; 2567 for (b=XMesaBufferList; b; b=next) { 2568 next = b->Next; 2569 if (!b->pixmap_flag) { 2570#ifdef XFree86Server 2571 /* NOT_NEEDED */ 2572#else 2573 XSync(b->display, False); 2574 if (!window_exists( b->display, b->frontbuffer )) { 2575 /* found a dead window, free the ancillary info */ 2576 XMesaDestroyBuffer( b ); 2577 } 2578#endif 2579 } 2580 } 2581} 2582 2583 2584void XMesaReset( void ) 2585{ 2586 while (XMesaBufferList) 2587 XMesaDestroyBuffer(XMesaBufferList); 2588 2589 XMesaBufferList = NULL; 2590} 2591 2592 2593unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2594 GLfloat red, GLfloat green, 2595 GLfloat blue, GLfloat alpha ) 2596{ 2597 GLint r = (GLint) (red * 255.0F); 2598 GLint g = (GLint) (green * 255.0F); 2599 GLint b = (GLint) (blue * 255.0F); 2600 GLint a = (GLint) (alpha * 255.0F); 2601 2602 switch (xmesa->pixelformat) { 2603 case PF_INDEX: 2604 return 0; 2605 case PF_TRUECOLOR: 2606 { 2607 unsigned long p; 2608 PACK_TRUECOLOR( p, r, g, b ); 2609 return p; 2610 } 2611 case PF_8A8B8G8R: 2612 return PACK_8A8B8G8R( r, g, b, a ); 2613 case PF_8R8G8B: 2614 return PACK_8R8G8B( r, g, b ); 2615 case PF_5R6G5B: 2616 return PACK_5R6G5B( r, g, b ); 2617 case PF_DITHER: 2618 { 2619 DITHER_SETUP; 2620 return DITHER( x, y, r, g, b ); 2621 } 2622 case PF_1BIT: 2623 /* 382 = (3*255)/2 */ 2624 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2625 case PF_HPCR: 2626 return DITHER_HPCR(x, y, r, g, b); 2627 case PF_LOOKUP: 2628 { 2629 LOOKUP_SETUP; 2630 return LOOKUP( r, g, b ); 2631 } 2632 case PF_GRAYSCALE: 2633 return GRAY_RGB( r, g, b ); 2634 case PF_DITHER_5R6G5B: 2635 /* fall through */ 2636 case PF_TRUEDITHER: 2637 { 2638 unsigned long p; 2639 PACK_TRUEDITHER(p, x, y, r, g, b); 2640 return p; 2641 } 2642 default: 2643 gl_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2644 } 2645 return 0; 2646} 2647 2648 2649