xm_api.c revision 97d8a35fa8bf906be5413dbde822e828f9075604
1/* 2 * Mesa 3-D graphics library 3 * Version: 5.1 4 * 5 * Copyright (C) 1999-2003 Brian Paul All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included 15 * in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25/* 26 * This file contains the implementations of all the XMesa* functions. 27 * 28 * 29 * NOTES: 30 * 31 * The window coordinate system origin (0,0) is in the lower-left corner 32 * of the window. X11's window coordinate origin is in the upper-left 33 * corner of the window. Therefore, most drawing functions in this 34 * file have to flip Y coordinates. 35 * 36 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 37 * in support for the MIT Shared Memory extension. If enabled, when you 38 * use an Ximage for the back buffer in double buffered mode, the "swap" 39 * operation will be faster. You must also link with -lXext. 40 * 41 * Byte swapping: If the Mesa host and the X display use a different 42 * byte order then there's some trickiness to be aware of when using 43 * XImages. The byte ordering used for the XImage is that of the X 44 * display, not the Mesa host. 45 * The color-to-pixel encoding for True/DirectColor must be done 46 * according to the display's visual red_mask, green_mask, and blue_mask. 47 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 48 * do byte swapping if needed. If one wants to directly "poke" the pixel 49 * into the XImage's buffer then the pixel must be byte swapped first. In 50 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 51 * and use XPutPixel everywhere except in the implementation of 52 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 53 * instead of using XPutPixel we "poke" our values after byte-swapping 54 * the clear pixel value if needed. 55 * 56 */ 57 58#ifdef __CYGWIN__ 59#undef WIN32 60#undef __WIN32__ 61#endif 62 63#include "glxheader.h" 64#include "GL/xmesa.h" 65#include "xmesaP.h" 66#include "context.h" 67#include "extensions.h" 68#include "glthread.h" 69#include "imports.h" 70#include "matrix.h" 71#include "mtypes.h" 72#include "macros.h" 73#include "texformat.h" 74#include "texobj.h" 75#include "texstore.h" 76#include "swrast/swrast.h" 77#include "swrast_setup/swrast_setup.h" 78#include "array_cache/acache.h" 79#include "tnl/tnl.h" 80 81#ifndef GLX_NONE_EXT 82#define GLX_NONE_EXT 0x8000 83#endif 84 85 86/* 87 * Global X driver lock 88 */ 89_glthread_Mutex _xmesa_lock; 90 91 92 93/* 94 * Lookup tables for HPCR pixel format: 95 */ 96static short hpcr_rgbTbl[3][256] = { 97{ 98 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 99 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 100 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 101 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 102 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 103 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 104 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 105 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 106112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 107128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 108144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 109160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 110176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 111192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 112208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 113224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 114}, 115{ 116 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 117 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 118 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 119 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 120 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 121 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 122 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 123 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 124112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 125128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 126144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 127160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 128176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 129192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 130208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 131224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 132}, 133{ 134 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 135 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 136 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 137 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 138 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 139 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 140 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 141 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 142 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 143112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 144128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 145144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 146160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 147176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 148192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 149208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 150} 151}; 152 153 154 155/**********************************************************************/ 156/***** X Utility Functions *****/ 157/**********************************************************************/ 158 159 160/* 161 * Return the host's byte order as LSBFirst or MSBFirst ala X. 162 */ 163#ifndef XFree86Server 164static int host_byte_order( void ) 165{ 166 int i = 1; 167 char *cptr = (char *) &i; 168 return (*cptr==1) ? LSBFirst : MSBFirst; 169} 170#endif 171 172 173/* 174 * Error handling. 175 */ 176#ifndef XFree86Server 177static volatile int mesaXErrorFlag = 0; 178 179static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 180{ 181 (void) dpy; 182 (void) event; 183 mesaXErrorFlag = 1; 184 return 0; 185} 186#endif 187 188 189/* 190 * Check if the X Shared Memory extension is available. 191 * Return: 0 = not available 192 * 1 = shared XImage support available 193 * 2 = shared Pixmap support available also 194 */ 195#ifndef XFree86Server 196static int check_for_xshm( XMesaDisplay *display ) 197{ 198#ifdef USE_XSHM 199 int major, minor, ignore; 200 Bool pixmaps; 201 202 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 203 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 204 return (pixmaps==True) ? 2 : 1; 205 } 206 else { 207 return 0; 208 } 209 } 210 else { 211 return 0; 212 } 213#else 214 /* Can't compile XSHM support */ 215 return 0; 216#endif 217} 218#endif 219 220 221/* 222 * Return the width and height of the given drawable. 223 */ 224static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 225 unsigned int *width, unsigned int *height) 226{ 227#ifdef XFree86Server 228 (void) dpy; 229 *width = d->width; 230 *height = d->height; 231#else 232 Window root; 233 int x, y; 234 unsigned int bw, depth; 235 236 _glthread_LOCK_MUTEX(_xmesa_lock); 237 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 238 _glthread_UNLOCK_MUTEX(_xmesa_lock); 239#endif 240} 241 242 243/* 244 * Apply gamma correction to an intensity value in [0..max]. Return the 245 * new intensity value. 246 */ 247static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 248{ 249 if (gamma == 1.0) { 250 return value; 251 } 252 else { 253 double x = (double) value / (double) max; 254 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 255 } 256} 257 258 259 260/* 261 * Return the true number of bits per pixel for XImages. 262 * For example, if we request a 24-bit deep visual we may actually need/get 263 * 32bpp XImages. This function returns the appropriate bpp. 264 * Input: dpy - the X display 265 * visinfo - desribes the visual to be used for XImages 266 * Return: true number of bits per pixel for XImages 267 */ 268#ifdef XFree86Server 269 270static int bits_per_pixel( XMesaVisual xmv ) 271{ 272 XMesaVisualInfo visinfo = xmv->visinfo; 273 const int depth = visinfo->nplanes; 274 int i; 275 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 276 if (screenInfo.formats[i].depth == depth) 277 return screenInfo.formats[i].bitsPerPixel; 278 } 279 return depth; /* should never get here, but this should be safe */ 280} 281 282#else 283 284static int bits_per_pixel( XMesaVisual xmv ) 285{ 286 XMesaDisplay *dpy = xmv->display; 287 XMesaVisualInfo visinfo = xmv->visinfo; 288 XMesaImage *img; 289 int bitsPerPixel; 290 /* Create a temporary XImage */ 291 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 292 ZPixmap, 0, /*format, offset*/ 293 (char*) MALLOC(8), /*data*/ 294 1, 1, /*width, height*/ 295 32, /*bitmap_pad*/ 296 0 /*bytes_per_line*/ 297 ); 298 assert(img); 299 /* grab the bits/pixel value */ 300 bitsPerPixel = img->bits_per_pixel; 301 /* free the XImage */ 302 FREE( img->data ); 303 img->data = NULL; 304 XMesaDestroyImage( img ); 305 return bitsPerPixel; 306} 307#endif 308 309 310 311/* 312 * Determine if a given X window ID is valid (window exists). 313 * Do this by calling XGetWindowAttributes() for the window and 314 * checking if we catch an X error. 315 * Input: dpy - the display 316 * win - the window to check for existance 317 * Return: GL_TRUE - window exists 318 * GL_FALSE - window doesn't exist 319 */ 320#ifndef XFree86Server 321static GLboolean WindowExistsFlag; 322 323static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 324{ 325 (void) dpy; 326 if (xerr->error_code == BadWindow) { 327 WindowExistsFlag = GL_FALSE; 328 } 329 return 0; 330} 331 332static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 333{ 334 XWindowAttributes wa; 335 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 336 WindowExistsFlag = GL_TRUE; 337 old_handler = XSetErrorHandler(window_exists_err_handler); 338 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 339 XSetErrorHandler(old_handler); 340 return WindowExistsFlag; 341} 342#endif 343 344 345 346/**********************************************************************/ 347/***** Linked list of XMesaBuffers *****/ 348/**********************************************************************/ 349 350static XMesaBuffer XMesaBufferList = NULL; 351 352 353/* Allocate a new XMesaBuffer, add to linked list */ 354static XMesaBuffer alloc_xmesa_buffer(void) 355{ 356 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 357 if (b) { 358 b->Next = XMesaBufferList; 359 XMesaBufferList = b; 360 } 361 return b; 362} 363 364 365/* 366 * Find an XMesaBuffer by matching X display and colormap but NOT matching 367 * the notThis buffer. 368 */ 369static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 370 XMesaColormap cmap, 371 XMesaBuffer notThis) 372{ 373 XMesaBuffer b; 374 for (b=XMesaBufferList; b; b=b->Next) { 375 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 376 return b; 377 } 378 } 379 return NULL; 380} 381 382 383/* 384 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 385 * entries. 386 */ 387static void free_xmesa_buffer(int client, XMesaBuffer buffer) 388{ 389 XMesaBuffer prev = NULL, b; 390 (void) client; 391 for (b=XMesaBufferList; b; b=b->Next) { 392 if (b==buffer) { 393 /* unlink bufer from list */ 394 if (prev) 395 prev->Next = buffer->Next; 396 else 397 XMesaBufferList = buffer->Next; 398 /* Check to free X colors */ 399 if (buffer->num_alloced>0) { 400 /* If no other buffer uses this X colormap then free the colors. */ 401 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 402#ifdef XFree86Server 403 (void)FreeColors(buffer->cmap, client, 404 buffer->num_alloced, buffer->alloced_colors, 405 0); 406#else 407 XFreeColors(buffer->display, buffer->cmap, 408 buffer->alloced_colors, buffer->num_alloced, 0); 409#endif 410 } 411 } 412 413 _mesa_free_framebuffer_data(&buffer->mesa_buffer); 414 FREE(buffer); 415 416 return; 417 } 418 /* continue search */ 419 prev = b; 420 } 421 /* buffer not found in XMesaBufferList */ 422 _mesa_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 423} 424 425 426/* Copy X color table stuff from one XMesaBuffer to another. */ 427static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 428{ 429 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 430 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 431 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 432 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 433 dst->num_alloced = src->num_alloced; 434 MEMCPY(dst->alloced_colors, src->alloced_colors, 435 sizeof(src->alloced_colors)); 436} 437 438 439 440/**********************************************************************/ 441/***** Misc Private Functions *****/ 442/**********************************************************************/ 443 444 445/* 446 * Return number of bits set in n. 447 */ 448static int bitcount( unsigned long n ) 449{ 450 int bits; 451 for (bits=0; n>0; n=n>>1) { 452 if (n&1) { 453 bits++; 454 } 455 } 456 return bits; 457} 458 459 460 461/* 462 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 463 * Return: GL_TRUE if success, GL_FALSE if error 464 */ 465#ifndef XFree86Server 466static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 467{ 468#ifdef USE_XSHM 469 /* 470 * We have to do a _lot_ of error checking here to be sure we can 471 * really use the XSHM extension. It seems different servers trigger 472 * errors at different points if the extension won't work. Therefore 473 * we have to be very careful... 474 */ 475 GC gc; 476 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 477 478 b->backimage = XShmCreateImage( b->xm_visual->display, 479 b->xm_visual->visinfo->visual, 480 b->xm_visual->visinfo->depth, 481 ZPixmap, NULL, &b->shminfo, 482 b->width, b->height ); 483 if (b->backimage == NULL) { 484 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 485 b->shm = 0; 486 return GL_FALSE; 487 } 488 489 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 490 * b->backimage->height, IPC_CREAT|0777 ); 491 if (b->shminfo.shmid < 0) { 492 _mesa_warning(NULL, "shmget failed while allocating back buffer"); 493 XDestroyImage( b->backimage ); 494 b->backimage = NULL; 495 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmget), disabling."); 496 b->shm = 0; 497 return GL_FALSE; 498 } 499 500 b->shminfo.shmaddr = b->backimage->data 501 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 502 if (b->shminfo.shmaddr == (char *) -1) { 503 _mesa_warning(NULL, "shmat() failed while allocating back buffer"); 504 XDestroyImage( b->backimage ); 505 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 506 b->backimage = NULL; 507 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmat), disabling."); 508 b->shm = 0; 509 return GL_FALSE; 510 } 511 512 b->shminfo.readOnly = False; 513 mesaXErrorFlag = 0; 514 old_handler = XSetErrorHandler( mesaHandleXError ); 515 /* This may trigger the X protocol error we're ready to catch: */ 516 XShmAttach( b->xm_visual->display, &b->shminfo ); 517 XSync( b->xm_visual->display, False ); 518 519 if (mesaXErrorFlag) { 520 /* we are on a remote display, this error is normal, don't print it */ 521 XFlush( b->xm_visual->display ); 522 mesaXErrorFlag = 0; 523 XDestroyImage( b->backimage ); 524 shmdt( b->shminfo.shmaddr ); 525 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 526 b->backimage = NULL; 527 b->shm = 0; 528 (void) XSetErrorHandler( old_handler ); 529 return GL_FALSE; 530 } 531 532 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 533 534 /* Finally, try an XShmPutImage to be really sure the extension works */ 535 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 536 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 537 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 538 XSync( b->xm_visual->display, False ); 539 XFreeGC( b->xm_visual->display, gc ); 540 (void) XSetErrorHandler( old_handler ); 541 if (mesaXErrorFlag) { 542 XFlush( b->xm_visual->display ); 543 mesaXErrorFlag = 0; 544 XDestroyImage( b->backimage ); 545 shmdt( b->shminfo.shmaddr ); 546 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 547 b->backimage = NULL; 548 b->shm = 0; 549 return GL_FALSE; 550 } 551 552 if (b->backimage) { 553 int height = b->backimage->height; 554 /* Needed by PIXELADDR1 macro */ 555 b->ximage_width1 = b->backimage->bytes_per_line; 556 b->ximage_origin1 = (GLubyte *) b->backimage->data 557 + b->ximage_width1 * (height-1); 558 /* Needed by PIXELADDR2 macro */ 559 b->ximage_width2 = b->backimage->bytes_per_line / 2; 560 b->ximage_origin2 = (GLushort *) b->backimage->data 561 + b->ximage_width2 * (height-1); 562 /* Needed by PIXELADDR3 macro */ 563 b->ximage_width3 = b->backimage->bytes_per_line; 564 b->ximage_origin3 = (GLubyte *) b->backimage->data 565 + b->ximage_width3 * (height-1); 566 /* Needed by PIXELADDR4 macro */ 567 b->ximage_width4 = b->backimage->width; 568 b->ximage_origin4 = (GLuint *) b->backimage->data 569 + b->ximage_width4 * (height-1); 570 } 571 572 return GL_TRUE; 573#else 574 /* Can't compile XSHM support */ 575 return GL_FALSE; 576#endif 577} 578#endif 579 580 581 582/* 583 * Setup an off-screen pixmap or Ximage to use as the back buffer. 584 * Input: b - the X/Mesa buffer 585 */ 586void xmesa_alloc_back_buffer( XMesaBuffer b ) 587{ 588 if (b->db_state==BACK_XIMAGE) { 589 /* Deallocate the old backimage, if any */ 590 if (b->backimage) { 591#if defined(USE_XSHM) && !defined(XFree86Server) 592 if (b->shm) { 593 XShmDetach( b->xm_visual->display, &b->shminfo ); 594 XDestroyImage( b->backimage ); 595 shmdt( b->shminfo.shmaddr ); 596 } 597 else 598#endif 599 XMesaDestroyImage( b->backimage ); 600 b->backimage = NULL; 601 } 602 603 /* Allocate new back buffer */ 604#ifdef XFree86Server 605 { 606 /* Allocate a regular XImage for the back buffer. */ 607 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 608 b->width, b->height, NULL); 609#else 610 if (b->shm==0 || alloc_shm_back_buffer(b)==GL_FALSE) { 611 /* Allocate a regular XImage for the back buffer. */ 612 b->backimage = XCreateImage( b->xm_visual->display, 613 b->xm_visual->visinfo->visual, 614 GET_VISUAL_DEPTH(b->xm_visual), 615 ZPixmap, 0, /* format, offset */ 616 NULL, b->width, b->height, 617 8, 0 ); /* pad, bytes_per_line */ 618#endif 619 if (!b->backimage) { 620 _mesa_warning(NULL, "alloc_back_buffer: XCreateImage failed."); 621 } 622 b->backimage->data = (char *) MALLOC( b->backimage->height 623 * b->backimage->bytes_per_line ); 624 if (!b->backimage->data) { 625 _mesa_warning(NULL, "alloc_back_buffer: MALLOC failed."); 626 XMesaDestroyImage( b->backimage ); 627 b->backimage = NULL; 628 } 629 } 630 b->backpixmap = None; 631 } 632 else if (b->db_state==BACK_PIXMAP) { 633 XMesaPixmap old_pixmap = b->backpixmap; 634 /* Free the old back pixmap */ 635 if (b->backpixmap) { 636 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 637 } 638 /* Allocate new back pixmap */ 639 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 640 b->width, b->height, 641 GET_VISUAL_DEPTH(b->xm_visual) ); 642 b->backimage = NULL; 643 /* update other references to backpixmap */ 644 if (b->buffer==(XMesaDrawable)old_pixmap) { 645 b->buffer = (XMesaDrawable)b->backpixmap; 646 } 647 } 648} 649 650 651 652/* 653 * A replacement for XAllocColor. This function should never 654 * fail to allocate a color. When XAllocColor fails, we return 655 * the nearest matching color. If we have to allocate many colors 656 * this function isn't too efficient; the XQueryColors() could be 657 * done just once. 658 * Written by Michael Pichler, Brian Paul, Mark Kilgard 659 * Input: dpy - X display 660 * cmap - X colormap 661 * cmapSize - size of colormap 662 * In/Out: color - the XColor struct 663 * Output: exact - 1=exact color match, 0=closest match 664 * alloced - 1=XAlloc worked, 0=XAlloc failed 665 */ 666static void 667noFaultXAllocColor( int client, 668 XMesaDisplay *dpy, 669 XMesaColormap cmap, 670 int cmapSize, 671 XMesaColor *color, 672 int *exact, int *alloced ) 673{ 674#ifdef XFree86Server 675 Pixel *ppixIn; 676 xrgb *ctable; 677#else 678 /* we'll try to cache ctable for better remote display performance */ 679 static Display *prevDisplay = NULL; 680 static XMesaColormap prevCmap = 0; 681 static int prevCmapSize = 0; 682 static XMesaColor *ctable = NULL; 683#endif 684 XMesaColor subColor; 685 int i, bestmatch; 686 double mindist; /* 3*2^16^2 exceeds long int precision. */ 687 688 (void) client; 689 690 /* First try just using XAllocColor. */ 691#ifdef XFree86Server 692 if (AllocColor(cmap, 693 &color->red, &color->green, &color->blue, 694 &color->pixel, 695 client) == Success) { 696#else 697 if (XAllocColor(dpy, cmap, color)) { 698#endif 699 *exact = 1; 700 *alloced = 1; 701 return; 702 } 703 704 /* Alloc failed, search for closest match */ 705 706 /* Retrieve color table entries. */ 707 /* XXX alloca candidate. */ 708#ifdef XFree86Server 709 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 710 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 711 for (i = 0; i < cmapSize; i++) { 712 ppixIn[i] = i; 713 } 714 QueryColors(cmap, cmapSize, ppixIn, ctable); 715#else 716 if (prevDisplay != dpy || prevCmap != cmap 717 || prevCmapSize != cmapSize || !ctable) { 718 /* free previously cached color table */ 719 if (ctable) 720 FREE(ctable); 721 /* Get the color table from X */ 722 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 723 assert(ctable); 724 for (i = 0; i < cmapSize; i++) { 725 ctable[i].pixel = i; 726 } 727 XQueryColors(dpy, cmap, ctable, cmapSize); 728 prevDisplay = dpy; 729 prevCmap = cmap; 730 prevCmapSize = cmapSize; 731 } 732#endif 733 734 /* Find best match. */ 735 bestmatch = -1; 736 mindist = 0.0; 737 for (i = 0; i < cmapSize; i++) { 738 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 739 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 740 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 741 double dist = dr * dr + dg * dg + db * db; 742 if (bestmatch < 0 || dist < mindist) { 743 bestmatch = i; 744 mindist = dist; 745 } 746 } 747 748 /* Return result. */ 749 subColor.red = ctable[bestmatch].red; 750 subColor.green = ctable[bestmatch].green; 751 subColor.blue = ctable[bestmatch].blue; 752 /* Try to allocate the closest match color. This should only 753 * fail if the cell is read/write. Otherwise, we're incrementing 754 * the cell's reference count. 755 */ 756#ifdef XFree86Server 757 if (AllocColor(cmap, 758 &subColor.red, &subColor.green, &subColor.blue, 759 &subColor.pixel, 760 client) == Success) { 761#else 762 if (XAllocColor(dpy, cmap, &subColor)) { 763#endif 764 *alloced = 1; 765 } 766 else { 767 /* do this to work around a problem reported by Frank Ortega */ 768 subColor.pixel = (unsigned long) bestmatch; 769 subColor.red = ctable[bestmatch].red; 770 subColor.green = ctable[bestmatch].green; 771 subColor.blue = ctable[bestmatch].blue; 772 subColor.flags = DoRed | DoGreen | DoBlue; 773 *alloced = 0; 774 } 775#ifdef XFree86Server 776 FREE(ppixIn); 777 FREE(ctable); 778#else 779 /* don't free table, save it for next time */ 780#endif 781 782 *color = subColor; 783 *exact = 0; 784} 785 786 787 788 789/* 790 * Do setup for PF_GRAYSCALE pixel format. 791 * Note that buffer may be NULL. 792 */ 793static GLboolean setup_grayscale( int client, XMesaVisual v, 794 XMesaBuffer buffer, XMesaColormap cmap ) 795{ 796 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 797 return GL_FALSE; 798 } 799 800 if (buffer) { 801 XMesaBuffer prevBuffer; 802 803 if (!cmap) { 804 return GL_FALSE; 805 } 806 807 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 808 if (prevBuffer && 809 (buffer->xm_visual->mesa_visual.rgbMode == 810 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 811 /* Copy colormap stuff from previous XMesaBuffer which uses same 812 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 813 */ 814 copy_colortable_info(buffer, prevBuffer); 815 } 816 else { 817 /* Allocate 256 shades of gray */ 818 int gray; 819 int colorsfailed = 0; 820 for (gray=0;gray<256;gray++) { 821 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 822 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 823 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 824 int exact, alloced; 825 XMesaColor xcol; 826 xcol.red = (r << 8) | r; 827 xcol.green = (g << 8) | g; 828 xcol.blue = (b << 8) | b; 829 noFaultXAllocColor( client, v->display, 830 cmap, GET_COLORMAP_SIZE(v), 831 &xcol, &exact, &alloced ); 832 if (!exact) { 833 colorsfailed++; 834 } 835 if (alloced) { 836 assert(buffer->num_alloced<256); 837 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 838 buffer->num_alloced++; 839 } 840 841 /*OLD 842 assert(gray < 576); 843 buffer->color_table[gray*3+0] = xcol.pixel; 844 buffer->color_table[gray*3+1] = xcol.pixel; 845 buffer->color_table[gray*3+2] = xcol.pixel; 846 assert(xcol.pixel < 65536); 847 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 848 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 849 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 850 */ 851 buffer->color_table[gray] = xcol.pixel; 852 assert(xcol.pixel < 65536); 853 buffer->pixel_to_r[xcol.pixel] = gray; 854 buffer->pixel_to_g[xcol.pixel] = gray; 855 buffer->pixel_to_b[xcol.pixel] = gray; 856 } 857 858 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 859 _mesa_warning(NULL, 860 "Note: %d out of 256 needed colors do not match exactly.\n", 861 colorsfailed ); 862 } 863 } 864 } 865 866 v->dithered_pf = PF_Grayscale; 867 v->undithered_pf = PF_Grayscale; 868 return GL_TRUE; 869} 870 871 872 873/* 874 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 875 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 876 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 877 * color. While this function was originally designed just for 8-bit 878 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 879 * Dithering code contributed by Bob Mercier. 880 */ 881static GLboolean setup_dithered_color( int client, XMesaVisual v, 882 XMesaBuffer buffer, XMesaColormap cmap ) 883{ 884 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 885 return GL_FALSE; 886 } 887 888 if (buffer) { 889 XMesaBuffer prevBuffer; 890 891 if (!cmap) { 892 return GL_FALSE; 893 } 894 895 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 896 if (prevBuffer && 897 (buffer->xm_visual->mesa_visual.rgbMode == 898 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 899 /* Copy colormap stuff from previous, matching XMesaBuffer. 900 * Do this to avoid time spent in noFaultXAllocColor. 901 */ 902 copy_colortable_info(buffer, prevBuffer); 903 } 904 else { 905 /* Allocate X colors and initialize color_table[], red_table[], etc */ 906 int r, g, b, i; 907 int colorsfailed = 0; 908 for (r = 0; r < DITH_R; r++) { 909 for (g = 0; g < DITH_G; g++) { 910 for (b = 0; b < DITH_B; b++) { 911 XMesaColor xcol; 912 int exact, alloced; 913 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 914 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 915 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 916 noFaultXAllocColor( client, v->display, 917 cmap, GET_COLORMAP_SIZE(v), 918 &xcol, &exact, &alloced ); 919 if (!exact) { 920 colorsfailed++; 921 } 922 if (alloced) { 923 assert(buffer->num_alloced<256); 924 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 925 buffer->num_alloced++; 926 } 927 i = DITH_MIX( r, g, b ); 928 assert(i < 576); 929 buffer->color_table[i] = xcol.pixel; 930 assert(xcol.pixel < 65536); 931 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 932 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 933 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 934 } 935 } 936 } 937 938 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 939 _mesa_warning(NULL, 940 "Note: %d out of %d needed colors do not match exactly.\n", 941 colorsfailed, DITH_R * DITH_G * DITH_B ); 942 } 943 } 944 } 945 946 v->dithered_pf = PF_Dither; 947 v->undithered_pf = PF_Lookup; 948 return GL_TRUE; 949} 950 951 952/* 953 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 954 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 955 * Special dithering tables have to be initialized. 956 */ 957static void setup_8bit_hpcr( XMesaVisual v ) 958{ 959 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 960 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 961 * on the root window AND the colormap obtainable by XGetRGBColormaps 962 * for that atom must be set on the window. (see also tkInitWindow) 963 * If that colormap is not set, the output will look stripy. 964 */ 965 966 /* Setup color tables with gamma correction */ 967 int i; 968 double g; 969 970 g = 1.0 / v->RedGamma; 971 for (i=0; i<256; i++) { 972 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 973 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 974 } 975 976 g = 1.0 / v->GreenGamma; 977 for (i=0; i<256; i++) { 978 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 979 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 980 } 981 982 g = 1.0 / v->BlueGamma; 983 for (i=0; i<256; i++) { 984 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 985 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 986 } 987 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 988 v->dithered_pf = PF_HPCR; 989 990 /* which method should I use to clear */ 991 /* GL_FALSE: keep the ordinary method */ 992 /* GL_TRUE : clear with dither pattern */ 993 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 994 995 if (v->hpcr_clear_flag) { 996 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 997 DefaultRootWindow(v->display), 998 16, 2, 8); 999#ifndef XFree86Server 1000 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1001 0, 0, 16, 2, AllPlanes, ZPixmap); 1002#endif 1003 } 1004} 1005 1006 1007/* 1008 * Setup RGB rendering for a window with a True/DirectColor visual. 1009 */ 1010static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1011 XMesaColormap cmap ) 1012{ 1013 unsigned long rmask, gmask, bmask; 1014 (void) buffer; 1015 (void) cmap; 1016 1017 /* Compute red multiplier (mask) and bit shift */ 1018 v->rshift = 0; 1019 rmask = GET_REDMASK(v); 1020 while ((rmask & 1)==0) { 1021 v->rshift++; 1022 rmask = rmask >> 1; 1023 } 1024 1025 /* Compute green multiplier (mask) and bit shift */ 1026 v->gshift = 0; 1027 gmask = GET_GREENMASK(v); 1028 while ((gmask & 1)==0) { 1029 v->gshift++; 1030 gmask = gmask >> 1; 1031 } 1032 1033 /* Compute blue multiplier (mask) and bit shift */ 1034 v->bshift = 0; 1035 bmask = GET_BLUEMASK(v); 1036 while ((bmask & 1)==0) { 1037 v->bshift++; 1038 bmask = bmask >> 1; 1039 } 1040 1041 /* 1042 * Compute component-to-pixel lookup tables and dithering kernel 1043 */ 1044 { 1045 static GLubyte kernel[16] = { 1046 0*16, 8*16, 2*16, 10*16, 1047 12*16, 4*16, 14*16, 6*16, 1048 3*16, 11*16, 1*16, 9*16, 1049 15*16, 7*16, 13*16, 5*16, 1050 }; 1051 GLint rBits = bitcount(rmask); 1052 GLint gBits = bitcount(gmask); 1053 GLint bBits = bitcount(bmask); 1054 GLint maxBits; 1055 GLuint i; 1056 1057 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1058 for (i=0; i<=rmask; i++) 1059 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1060 for (i=0; i<=gmask; i++) 1061 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1062 for (i=0; i<=bmask; i++) 1063 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1064 1065 /* convert RGB values from [0,255] to pixel components */ 1066 1067 for (i=0;i<256;i++) { 1068 GLint r = gamma_adjust(v->RedGamma, i, 255); 1069 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1070 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1071 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1072 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1073 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1074 } 1075 /* overflow protection */ 1076 for (i=256;i<512;i++) { 1077 v->RtoPixel[i] = v->RtoPixel[255]; 1078 v->GtoPixel[i] = v->GtoPixel[255]; 1079 v->BtoPixel[i] = v->BtoPixel[255]; 1080 } 1081 1082 /* setup dithering kernel */ 1083 maxBits = rBits; 1084 if (gBits > maxBits) maxBits = gBits; 1085 if (bBits > maxBits) maxBits = bBits; 1086 for (i=0;i<16;i++) { 1087 v->Kernel[i] = kernel[i] >> maxBits; 1088 } 1089 1090 v->undithered_pf = PF_Truecolor; 1091 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 1092 } 1093 1094 /* 1095 * Now check for TrueColor visuals which we can optimize. 1096 */ 1097 if ( GET_REDMASK(v) ==0x0000ff 1098 && GET_GREENMASK(v)==0x00ff00 1099 && GET_BLUEMASK(v) ==0xff0000 1100 && CHECK_BYTE_ORDER(v) 1101 && v->BitsPerPixel==32 1102 && sizeof(GLuint)==4 1103 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1104 /* common 32 bpp config used on SGI, Sun */ 1105 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1106 } 1107 else if (GET_REDMASK(v) ==0xff0000 1108 && GET_GREENMASK(v)==0x00ff00 1109 && GET_BLUEMASK(v) ==0x0000ff 1110 && CHECK_BYTE_ORDER(v) 1111 && v->BitsPerPixel==32 1112 && sizeof(GLuint)==4 1113 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1114 /* common 32 bpp config used on Linux, HP, IBM */ 1115 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1116 } 1117 else if (GET_REDMASK(v) ==0xff0000 1118 && GET_GREENMASK(v)==0x00ff00 1119 && GET_BLUEMASK(v) ==0x0000ff 1120 && CHECK_BYTE_ORDER(v) 1121 && v->BitsPerPixel==24 1122 && sizeof(GLuint)==4 1123 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1124 /* common packed 24 bpp config used on Linux */ 1125 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1126 } 1127 else if (GET_REDMASK(v) ==0xf800 1128 && GET_GREENMASK(v)==0x07e0 1129 && GET_BLUEMASK(v) ==0x001f 1130 && CHECK_BYTE_ORDER(v) 1131 && v->BitsPerPixel==16 1132 && sizeof(GLushort)==2 1133 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1134 /* 5-6-5 color weight on common PC VGA boards */ 1135 v->undithered_pf = PF_5R6G5B; 1136 v->dithered_pf = PF_Dither_5R6G5B; 1137 } 1138 else if (GET_REDMASK(v) ==0xe0 1139 && GET_GREENMASK(v)==0x1c 1140 && GET_BLUEMASK(v) ==0x03 1141 && CHECK_FOR_HPCR(v)) { 1142 setup_8bit_hpcr( v ); 1143 } 1144} 1145 1146 1147 1148/* 1149 * Setup RGB rendering for a window with a monochrome visual. 1150 */ 1151static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1152{ 1153 (void) b; 1154 v->dithered_pf = v->undithered_pf = PF_1Bit; 1155 /* if black=1 then we must flip pixel values */ 1156 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1157} 1158 1159 1160 1161/* 1162 * When a context is "made current" for the first time, we can finally 1163 * finish initializing the context's visual and buffer information. 1164 * Input: v - the XMesaVisual to initialize 1165 * b - the XMesaBuffer to initialize (may be NULL) 1166 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1167 * window - the window/pixmap we're rendering into 1168 * cmap - the colormap associated with the window/pixmap 1169 * Return: GL_TRUE=success, GL_FALSE=failure 1170 */ 1171static GLboolean initialize_visual_and_buffer( int client, 1172 XMesaVisual v, 1173 XMesaBuffer b, 1174 GLboolean rgb_flag, 1175 XMesaDrawable window, 1176 XMesaColormap cmap ) 1177{ 1178#ifndef XFree86Server 1179 XGCValues gcvalues; 1180#endif 1181 1182 if (b) { 1183 assert(b->xm_visual == v); 1184 } 1185 1186 /* Save true bits/pixel */ 1187 v->BitsPerPixel = bits_per_pixel(v); 1188 assert(v->BitsPerPixel > 0); 1189 1190 1191 if (rgb_flag==GL_FALSE) { 1192 /* COLOR-INDEXED WINDOW: 1193 * Even if the visual is TrueColor or DirectColor we treat it as 1194 * being color indexed. This is weird but might be useful to someone. 1195 */ 1196 v->dithered_pf = v->undithered_pf = PF_Index; 1197 v->index_bits = GET_VISUAL_DEPTH(v); 1198 } 1199 else { 1200 /* RGB WINDOW: 1201 * We support RGB rendering into almost any kind of visual. 1202 */ 1203 int xclass; 1204 xclass = GET_VISUAL_CLASS(v); 1205 if (xclass==TrueColor || xclass==DirectColor) { 1206 setup_truecolor( v, b, cmap ); 1207 } 1208 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { 1209 setup_monochrome( v, b ); 1210 } 1211 else if (xclass==GrayScale || xclass==StaticGray) { 1212 if (!setup_grayscale( client, v, b, cmap )) { 1213 return GL_FALSE; 1214 } 1215 } 1216 else if ((xclass==PseudoColor || xclass==StaticColor) 1217 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1218 if (!setup_dithered_color( client, v, b, cmap )) { 1219 return GL_FALSE; 1220 } 1221 } 1222 else { 1223 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual."); 1224 return GL_FALSE; 1225 } 1226 v->index_bits = 0; 1227 1228 if (_mesa_getenv("MESA_NO_DITHER")) { 1229 v->dithered_pf = v->undithered_pf; 1230 } 1231 } 1232 1233 1234 /* 1235 * If MESA_INFO env var is set print out some debugging info 1236 * which can help Brian figure out what's going on when a user 1237 * reports bugs. 1238 */ 1239 if (_mesa_getenv("MESA_INFO")) { 1240 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1241 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1242 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1243 _mesa_printf("X/Mesa level = %d\n", v->level); 1244 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1245 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1246 } 1247 1248 if (b && window) { 1249 /* Do window-specific initializations */ 1250 1251 /* Window dimensions */ 1252 unsigned int w, h; 1253 get_drawable_size( v->display, window, &w, &h ); 1254 b->width = w; 1255 b->height = h; 1256 1257 b->frontbuffer = window; 1258 1259 /* Setup for single/double buffering */ 1260 if (v->mesa_visual.doubleBufferMode) { 1261 /* Double buffered */ 1262#ifndef XFree86Server 1263 b->shm = check_for_xshm( v->display ); 1264#endif 1265 xmesa_alloc_back_buffer( b ); 1266 if (b->db_state==BACK_PIXMAP) { 1267 b->buffer = (XMesaDrawable)b->backpixmap; 1268 } 1269 else { 1270 b->buffer = XIMAGE; 1271 } 1272 } 1273 else { 1274 /* Single Buffered */ 1275 b->buffer = b->frontbuffer; 1276 } 1277 1278 /* X11 graphics contexts */ 1279#ifdef XFree86Server 1280 b->gc = CreateScratchGC(v->display, window->depth); 1281#else 1282 b->gc = XCreateGC( v->display, window, 0, NULL ); 1283#endif 1284 XMesaSetFunction( v->display, b->gc, GXcopy ); 1285 1286 /* cleargc - for glClear() */ 1287#ifdef XFree86Server 1288 b->cleargc = CreateScratchGC(v->display, window->depth); 1289#else 1290 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1291#endif 1292 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1293 1294 /* 1295 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1296 * Patch contributed by Michael Pichler May 15, 1995. 1297 */ 1298#ifdef XFree86Server 1299 b->swapgc = CreateScratchGC(v->display, window->depth); 1300 { 1301 CARD32 v[1]; 1302 v[0] = FALSE; 1303 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1304 } 1305#else 1306 gcvalues.graphics_exposures = False; 1307 b->swapgc = XCreateGC( v->display, window, 1308 GCGraphicsExposures, &gcvalues); 1309#endif 1310 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1311 /* 1312 * Set fill style and tile pixmap once for all for HPCR stuff 1313 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1314 * Initialize whole stuff 1315 * Patch contributed by Jacques Leroy March 8, 1998. 1316 */ 1317 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1318 int i; 1319 for (i=0; i<16; i++) 1320 { 1321 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1322 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1323 } 1324 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1325 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1326 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1327 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1328 } 1329 1330 /* Initialize the row buffer XImage for use in write_color_span() */ 1331#ifdef XFree86Server 1332 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1333 (char *)MALLOC(MAX_WIDTH*4)); 1334#else 1335 b->rowimage = XCreateImage( v->display, 1336 v->visinfo->visual, 1337 v->visinfo->depth, 1338 ZPixmap, 0, /*format, offset*/ 1339 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1340 MAX_WIDTH, 1, /*width, height*/ 1341 32, /*bitmap_pad*/ 1342 0 /*bytes_per_line*/ ); 1343#endif 1344 } 1345 1346 return GL_TRUE; 1347} 1348 1349 1350 1351/* 1352 * Convert an RGBA color to a pixel value. 1353 */ 1354unsigned long 1355xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1356 GLuint pixelFormat) 1357{ 1358 switch (pixelFormat) { 1359 case PF_Index: 1360 return 0; 1361 case PF_Truecolor: 1362 { 1363 unsigned long p; 1364 PACK_TRUECOLOR( p, r, g, b ); 1365 return p; 1366 } 1367 case PF_8A8B8G8R: 1368 return PACK_8A8B8G8R( r, g, b, a ); 1369 case PF_8R8G8B: 1370 /* fall through */ 1371 case PF_8R8G8B24: 1372 return PACK_8R8G8B( r, g, b ); 1373 case PF_5R6G5B: 1374 return PACK_5R6G5B( r, g, b ); 1375 case PF_Dither: 1376 { 1377 DITHER_SETUP; 1378 return DITHER( 1, 0, r, g, b ); 1379 } 1380 case PF_1Bit: 1381 /* 382 = (3*255)/2 */ 1382 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1383 case PF_HPCR: 1384 return DITHER_HPCR(1, 1, r, g, b); 1385 case PF_Lookup: 1386 { 1387 LOOKUP_SETUP; 1388 return LOOKUP( r, g, b ); 1389 } 1390 case PF_Grayscale: 1391 return GRAY_RGB( r, g, b ); 1392 case PF_Dither_True: 1393 /* fall through */ 1394 case PF_Dither_5R6G5B: 1395 { 1396 unsigned long p; 1397 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1398 return p; 1399 } 1400 default: 1401 _mesa_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1402 } 1403 return 0; 1404} 1405 1406 1407/**********************************************************************/ 1408/***** Public Functions *****/ 1409/**********************************************************************/ 1410 1411 1412/* 1413 * Create a new X/Mesa visual. 1414 * Input: display - X11 display 1415 * visinfo - an XVisualInfo pointer 1416 * rgb_flag - GL_TRUE = RGB mode, 1417 * GL_FALSE = color index mode 1418 * alpha_flag - alpha buffer requested? 1419 * db_flag - GL_TRUE = double-buffered, 1420 * GL_FALSE = single buffered 1421 * stereo_flag - stereo visual? 1422 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1423 * GL_FALSE = use an off-screen pixmap for back buffer 1424 * depth_size - requested bits/depth values, or zero 1425 * stencil_size - requested bits/stencil values, or zero 1426 * accum_red_size - requested bits/red accum values, or zero 1427 * accum_green_size - requested bits/green accum values, or zero 1428 * accum_blue_size - requested bits/blue accum values, or zero 1429 * accum_alpha_size - requested bits/alpha accum values, or zero 1430 * num_samples - number of samples/pixel if multisampling, or zero 1431 * level - visual level, usually 0 1432 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT 1433 * Return; a new XMesaVisual or 0 if error. 1434 */ 1435XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1436 XMesaVisualInfo visinfo, 1437 GLboolean rgb_flag, 1438 GLboolean alpha_flag, 1439 GLboolean db_flag, 1440 GLboolean stereo_flag, 1441 GLboolean ximage_flag, 1442 GLint depth_size, 1443 GLint stencil_size, 1444 GLint accum_red_size, 1445 GLint accum_green_size, 1446 GLint accum_blue_size, 1447 GLint accum_alpha_size, 1448 GLint num_samples, 1449 GLint level, 1450 GLint visualCaveat ) 1451{ 1452 char *gamma; 1453 XMesaVisual v; 1454 GLint red_bits, green_bits, blue_bits, alpha_bits; 1455 1456 /* For debugging only */ 1457 if (_mesa_getenv("MESA_XSYNC")) { 1458 /* This makes debugging X easier. 1459 * In your debugger, set a breakpoint on _XError to stop when an 1460 * X protocol error is generated. 1461 */ 1462#ifdef XFree86Server 1463 /* NOT_NEEDED */ 1464#else 1465 XSynchronize( display, 1 ); 1466#endif 1467 } 1468 1469 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1470 if (!v) { 1471 return NULL; 1472 } 1473 1474 /* 1475 * In the X server, NULL is passed in for the display. It will have 1476 * to be set before using this visual. See XMesaSetVisualDisplay() 1477 * below. 1478 */ 1479 v->display = display; 1480 1481 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1482 * the struct but we may need some of the information contained in it 1483 * at a later time. 1484 */ 1485#ifdef XFree86Server 1486 v->visinfo = visinfo; 1487#else 1488 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1489 if(!v->visinfo) { 1490 FREE(v); 1491 return NULL; 1492 } 1493 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1494#endif 1495 1496#ifdef XFree86Server 1497 /* Initialize the depth of the screen */ 1498 { 1499 PixmapFormatRec *format; 1500 1501 for (format = screenInfo.formats; 1502 format->depth != display->rootDepth; 1503 format++) 1504 ; 1505 v->screen_depth = format->bitsPerPixel; 1506 } 1507#endif 1508 1509 /* check for MESA_GAMMA environment variable */ 1510 gamma = _mesa_getenv("MESA_GAMMA"); 1511 if (gamma) { 1512 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1513 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1514 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1515 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1516 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1517 } 1518 else { 1519 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1520 } 1521 1522 v->ximage_flag = ximage_flag; 1523 v->level = level; 1524 v->VisualCaveat = visualCaveat; 1525 1526 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1527 1528 { 1529 int xclass; 1530 xclass = GET_VISUAL_CLASS(v); 1531 if (xclass==TrueColor || xclass==DirectColor) { 1532 red_bits = bitcount(GET_REDMASK(v)); 1533 green_bits = bitcount(GET_GREENMASK(v)); 1534 blue_bits = bitcount(GET_BLUEMASK(v)); 1535 alpha_bits = 0; 1536 } 1537 else { 1538 /* this is an approximation */ 1539 int depth; 1540 depth = GET_VISUAL_DEPTH(v); 1541 red_bits = depth / 3; 1542 depth -= red_bits; 1543 green_bits = depth / 2; 1544 depth -= green_bits; 1545 blue_bits = depth; 1546 alpha_bits = 0; 1547 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1548 } 1549 } 1550 1551 if (alpha_flag && alpha_bits == 0) 1552 alpha_bits = 8; 1553 1554 _mesa_initialize_visual( &v->mesa_visual, 1555 rgb_flag, db_flag, stereo_flag, 1556 red_bits, green_bits, 1557 blue_bits, alpha_bits, 1558 v->index_bits, 1559 depth_size, 1560 stencil_size, 1561 accum_red_size, accum_green_size, 1562 accum_blue_size, accum_alpha_size, 1563 0 ); 1564 return v; 1565} 1566 1567 1568void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1569{ 1570 v->display = dpy; 1571} 1572 1573 1574void XMesaDestroyVisual( XMesaVisual v ) 1575{ 1576#ifndef XFree86Server 1577 FREE(v->visinfo); 1578#endif 1579 FREE(v); 1580} 1581 1582 1583 1584/* 1585 * Create a new XMesaContext. 1586 * Input: v - XMesaVisual 1587 * share_list - another XMesaContext with which to share display 1588 * lists or NULL if no sharing is wanted. 1589 * Return: an XMesaContext or NULL if error. 1590 */ 1591XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1592{ 1593 static GLboolean firstTime = GL_TRUE; 1594 XMesaContext c; 1595 GLboolean direct = GL_TRUE; /* not really */ 1596 GLcontext *mesaCtx; 1597 1598 if (firstTime) { 1599 _glthread_INIT_MUTEX(_xmesa_lock); 1600 firstTime = GL_FALSE; 1601 } 1602 1603 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1604 if (!c) { 1605 return NULL; 1606 } 1607 1608 mesaCtx = &(c->mesa); 1609 1610 /* Setup these pointers here since they're using for making the default 1611 * and proxy texture objects. Actually, we don't really need to do 1612 * this since we're using the default fallback functions which 1613 * _mesa_initialize_context() would plug in if needed. 1614 */ 1615 mesaCtx->Driver.NewTextureObject = _mesa_new_texture_object; 1616 mesaCtx->Driver.DeleteTexture = _mesa_delete_texture_object; 1617 1618 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1619 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1620 (void *) c, direct)) { 1621 FREE(c); 1622 return NULL; 1623 } 1624 1625 _mesa_enable_sw_extensions(mesaCtx); 1626 _mesa_enable_1_3_extensions(mesaCtx); 1627 _mesa_enable_1_4_extensions(mesaCtx); 1628 _mesa_enable_1_5_extensions(mesaCtx); 1629 1630 if (CHECK_BYTE_ORDER(v)) { 1631 c->swapbytes = GL_FALSE; 1632 } 1633 else { 1634 c->swapbytes = GL_TRUE; 1635 } 1636 1637 c->xm_visual = v; 1638 c->xm_draw_buffer = NULL; /* set later by XMesaMakeCurrent */ 1639 c->xm_read_buffer = NULL; /* set later by XMesaMakeCurrent */ 1640 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1641 c->display = v->display; 1642 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1643 1644 mesaCtx->Driver.UpdateState = xmesa_update_state; 1645 1646 /* Initialize the software rasterizer and helper modules. 1647 */ 1648 _swrast_CreateContext( mesaCtx ); 1649 _ac_CreateContext( mesaCtx ); 1650 _tnl_CreateContext( mesaCtx ); 1651 _swsetup_CreateContext( mesaCtx ); 1652 1653 xmesa_register_swrast_functions( mesaCtx ); 1654 1655 /* Set up some constant pointers: 1656 */ 1657 xmesa_init_pointers( mesaCtx ); 1658 1659 return c; 1660} 1661 1662 1663 1664 1665void XMesaDestroyContext( XMesaContext c ) 1666{ 1667 GLcontext *mesaCtx = &c->mesa; 1668#ifdef FX 1669 if (c->xm_draw_buffer && c->xm_buffer->FXctx) 1670 fxMesaDestroyContext(c->xm_draw_buffer->FXctx); 1671#endif 1672 _swsetup_DestroyContext( mesaCtx ); 1673 _swrast_DestroyContext( mesaCtx ); 1674 _tnl_DestroyContext( mesaCtx ); 1675 _ac_DestroyContext( mesaCtx ); 1676 _mesa_free_context_data( mesaCtx ); 1677 _mesa_free( c ); 1678} 1679 1680 1681 1682/* 1683 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1684 * Create a new XMesaBuffer from an X window. 1685 * Input: v - the XMesaVisual 1686 * w - the window 1687 * c - the context 1688 * Return: new XMesaBuffer or NULL if error 1689 */ 1690XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1691 XMesaContext c ) 1692{ 1693#ifndef XFree86Server 1694 XWindowAttributes attr; 1695#endif 1696#ifdef FX 1697 char *fxEnvVar; 1698#endif 1699 int client = 0; 1700 1701 XMesaBuffer b = alloc_xmesa_buffer(); 1702 if (!b) { 1703 return NULL; 1704 } 1705 1706 (void) c; 1707 1708#ifdef XFree86Server 1709 client = CLIENT_ID(((XMesaDrawable)w)->id); 1710#endif 1711 1712 assert(v); 1713 1714#ifdef XFree86Server 1715 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1716#else 1717 XGetWindowAttributes( v->display, w, &attr ); 1718 1719 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1720#endif 1721 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1722 return NULL; 1723 } 1724 1725 b->xm_visual = v; 1726 b->type = WINDOW; 1727 b->display = v->display; 1728#ifdef XFree86Server 1729 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1730#else 1731 if (attr.colormap) { 1732 b->cmap = attr.colormap; 1733 } 1734 else { 1735 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1736 /* this is weird, a window w/out a colormap!? */ 1737 /* OK, let's just allocate a new one and hope for the best */ 1738 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1739 } 1740#endif 1741 1742 /* determine back buffer implementation */ 1743 if (v->mesa_visual.doubleBufferMode) { 1744 if (v->ximage_flag) { 1745 b->db_state = BACK_XIMAGE; 1746 } 1747 else { 1748 b->db_state = BACK_PIXMAP; 1749 } 1750 } 1751 else { 1752 b->db_state = 0; 1753 } 1754 1755 _mesa_initialize_framebuffer(&b->mesa_buffer, 1756 &v->mesa_visual, 1757 v->mesa_visual.depthBits > 0, 1758 v->mesa_visual.stencilBits > 0, 1759 v->mesa_visual.accumRedBits > 0, 1760 v->mesa_visual.alphaBits > 0 ); 1761 1762 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1763 (XMesaDrawable)w, b->cmap )) { 1764 free_xmesa_buffer(client, b); 1765 return NULL; 1766 } 1767 1768#ifdef FX 1769 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1770 if (fxEnvVar) { 1771 if (fxEnvVar[0]!='d') { 1772 int attribs[100]; 1773 int numAttribs = 0; 1774 int hw; 1775 if (v->mesa_visual.depthBits > 0) { 1776 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1777 attribs[numAttribs++] = v->mesa_visual.depthBits; 1778 } 1779 if (v->mesa_visual.doubleBufferMode) { 1780 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1781 } 1782 if (v->mesa_visual.accumRedBits > 0) { 1783 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1784 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1785 } 1786 if (v->mesa_visual.stencilBits > 0) { 1787 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1788 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1789 } 1790 if (v->mesa_visual.alphaBits > 0) { 1791 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1792 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1793 } 1794 if (1) { 1795 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1796 attribs[numAttribs++] = (int) &(c->mesa); 1797 } 1798 attribs[numAttribs++] = FXMESA_NONE; 1799 1800 /* [dBorca] need to revise this ASAP!!! */ 1801 /*if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) { 1802 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1803 if ((v->undithered_pf!=PF_Index) && (b->backimage)) { 1804 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1805 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1806 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1807 else 1808 b->FXwindowHack = GL_FALSE; 1809 } 1810 } 1811 else */{ 1812 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1813 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1814 GR_REFRESH_75Hz, attribs); 1815 else 1816 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1817 b->FXisHackUsable = GL_FALSE; 1818 b->FXwindowHack = GL_FALSE; 1819 } 1820 /* 1821 fprintf(stderr, 1822 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1823 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1824 */ 1825 } 1826 } 1827 else { 1828 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1829 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1830 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1831 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1832 } 1833#endif 1834 1835 return b; 1836} 1837 1838 1839XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1840{ 1841 return XMesaCreateWindowBuffer2( v, w, NULL ); 1842} 1843 1844 1845/* 1846 * Create a new XMesaBuffer from an X pixmap. 1847 * Input: v - the XMesaVisual 1848 * p - the pixmap 1849 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor 1850 * visual for the pixmap 1851 * Return: new XMesaBuffer or NULL if error 1852 */ 1853XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1854 XMesaPixmap p, XMesaColormap cmap ) 1855{ 1856 int client = 0; 1857 XMesaBuffer b = alloc_xmesa_buffer(); 1858 if (!b) { 1859 return NULL; 1860 } 1861 1862 1863#ifdef XFree86Server 1864 client = CLIENT_ID(((XMesaDrawable)p)->id); 1865#endif 1866 1867 assert(v); 1868 1869 b->xm_visual = v; 1870 b->type = PIXMAP; 1871 b->display = v->display; 1872 b->cmap = cmap; 1873 1874 /* determine back buffer implementation */ 1875 if (v->mesa_visual.doubleBufferMode) { 1876 if (v->ximage_flag) { 1877 b->db_state = BACK_XIMAGE; 1878 } 1879 else { 1880 b->db_state = BACK_PIXMAP; 1881 } 1882 } 1883 else { 1884 b->db_state = 0; 1885 } 1886 1887 _mesa_initialize_framebuffer(&b->mesa_buffer, 1888 &v->mesa_visual, 1889 v->mesa_visual.depthBits > 0, 1890 v->mesa_visual.stencilBits > 0, 1891 v->mesa_visual.accumRedBits + 1892 v->mesa_visual.accumGreenBits + 1893 v->mesa_visual.accumBlueBits > 0, 1894 v->mesa_visual.alphaBits > 0 ); 1895 1896 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1897 (XMesaDrawable)p, cmap)) { 1898 free_xmesa_buffer(client, b); 1899 return NULL; 1900 } 1901 1902 return b; 1903} 1904 1905 1906 1907XMesaBuffer XMesaCreatePBuffer( XMesaVisual v, XMesaColormap cmap, 1908 unsigned int width, unsigned int height ) 1909{ 1910#ifdef XFree86Server 1911 return 0; 1912#else 1913 int client = 0; 1914 XMesaWindow root; 1915 XMesaDrawable drawable; /* X Pixmap Drawable */ 1916 XMesaBuffer b = alloc_xmesa_buffer(); 1917 if (!b) { 1918 return NULL; 1919 } 1920 1921 b->xm_visual = v; 1922 b->type = PBUFFER; 1923 b->display = v->display; 1924 b->cmap = cmap; 1925 1926 /* allocate pixmap for front buffer */ 1927 root = RootWindow( v->display, v->visinfo->screen ); 1928 drawable = XCreatePixmap( v->display, root, width, height, v->visinfo->depth ); 1929 1930 /* determine back buffer implementation */ 1931 if (v->mesa_visual.doubleBufferMode) { 1932 if (v->ximage_flag) { 1933 b->db_state = BACK_XIMAGE; 1934 } 1935 else { 1936 b->db_state = BACK_PIXMAP; 1937 } 1938 } 1939 else { 1940 b->db_state = 0; 1941 } 1942 1943 _mesa_initialize_framebuffer(&b->mesa_buffer, 1944 &v->mesa_visual, 1945 v->mesa_visual.depthBits > 0, 1946 v->mesa_visual.stencilBits > 0, 1947 v->mesa_visual.accumRedBits + 1948 v->mesa_visual.accumGreenBits + 1949 v->mesa_visual.accumBlueBits > 0, 1950 v->mesa_visual.alphaBits > 0 ); 1951 1952 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1953 drawable, cmap)) { 1954 free_xmesa_buffer(client, b); 1955 return NULL; 1956 } 1957 1958 return b; 1959#endif 1960} 1961 1962 1963 1964/* 1965 * Deallocate an XMesaBuffer structure and all related info. 1966 */ 1967void XMesaDestroyBuffer( XMesaBuffer b ) 1968{ 1969 int client = 0; 1970 1971#ifdef XFree86Server 1972 if (b->frontbuffer) 1973 client = CLIENT_ID(b->frontbuffer->id); 1974#endif 1975 1976 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1977 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1978 if (b->swapgc) XMesaFreeGC( b->xm_visual->display, b->swapgc ); 1979 1980 if (b->backimage) { 1981#if defined(USE_XSHM) && !defined(XFree86Server) 1982 if (b->shm) { 1983 XShmDetach( b->xm_visual->display, &b->shminfo ); 1984 XDestroyImage( b->backimage ); 1985 shmdt( b->shminfo.shmaddr ); 1986 } 1987 else 1988#endif 1989 XMesaDestroyImage( b->backimage ); 1990 } 1991 if (b->backpixmap) { 1992 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 1993 if (b->xm_visual->hpcr_clear_flag) { 1994 XMesaFreePixmap( b->xm_visual->display, 1995 b->xm_visual->hpcr_clear_pixmap ); 1996 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 1997 } 1998 } 1999 if (b->rowimage) { 2000 FREE( b->rowimage->data ); 2001 b->rowimage->data = NULL; 2002 XMesaDestroyImage( b->rowimage ); 2003 } 2004 2005 free_xmesa_buffer(client, b); 2006} 2007 2008 2009 2010/* 2011 * Bind buffer b to context c and make c the current rendering context. 2012 */ 2013GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2014{ 2015 return XMesaMakeCurrent2( c, b, b ); 2016} 2017 2018 2019/* 2020 * Bind buffer b to context c and make c the current rendering context. 2021 */ 2022GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2023 XMesaBuffer readBuffer ) 2024{ 2025 if (c) { 2026 if (!drawBuffer || !readBuffer) 2027 return GL_FALSE; /* must specify buffers! */ 2028 2029#ifdef FX 2030 if (drawBuffer->FXctx) { 2031 fxMesaMakeCurrent(drawBuffer->FXctx); 2032 2033 c->xm_draw_buffer = drawBuffer; 2034 c->xm_read_buffer = readBuffer; 2035 c->xm_buffer = drawBuffer; 2036 2037 return GL_TRUE; 2038 } 2039#endif 2040 if (&(c->mesa) == _mesa_get_current_context() 2041 && c->xm_draw_buffer == drawBuffer 2042 && c->xm_read_buffer == readBuffer 2043 && c->xm_draw_buffer->wasCurrent) { 2044 /* same context and buffer, do nothing */ 2045 return GL_TRUE; 2046 } 2047 2048 c->xm_draw_buffer = drawBuffer; 2049 c->xm_read_buffer = readBuffer; 2050 c->xm_buffer = drawBuffer; 2051 2052 _mesa_make_current2(&(c->mesa), 2053 &drawBuffer->mesa_buffer, 2054 &readBuffer->mesa_buffer); 2055 2056 if (c->mesa.Viewport.Width == 0) { 2057 /* initialize viewport to window size */ 2058 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2059 c->mesa.Scissor.Width = drawBuffer->width; 2060 c->mesa.Scissor.Height = drawBuffer->height; 2061 } 2062 2063 if (c->xm_visual->mesa_visual.rgbMode) { 2064 /* 2065 * Must recompute and set these pixel values because colormap 2066 * can be different for different windows. 2067 */ 2068 c->clearpixel = xmesa_color_to_pixel( c, 2069 c->clearcolor[0], 2070 c->clearcolor[1], 2071 c->clearcolor[2], 2072 c->clearcolor[3], 2073 c->xm_visual->undithered_pf); 2074 XMesaSetForeground(c->display, c->xm_draw_buffer->cleargc, c->clearpixel); 2075 } 2076 2077 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2078 c->xm_draw_buffer->wasCurrent = GL_TRUE; 2079 } 2080 else { 2081 /* Detach */ 2082 _mesa_make_current2( NULL, NULL, NULL ); 2083 } 2084 return GL_TRUE; 2085} 2086 2087 2088/* 2089 * Unbind the context c from its buffer. 2090 */ 2091GLboolean XMesaUnbindContext( XMesaContext c ) 2092{ 2093 /* A no-op for XFree86 integration purposes */ 2094 return GL_TRUE; 2095} 2096 2097 2098XMesaContext XMesaGetCurrentContext( void ) 2099{ 2100 GET_CURRENT_CONTEXT(ctx); 2101 if (ctx) { 2102 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2103 return xmesa; 2104 } 2105 else { 2106 return 0; 2107 } 2108} 2109 2110 2111XMesaBuffer XMesaGetCurrentBuffer( void ) 2112{ 2113 GET_CURRENT_CONTEXT(ctx); 2114 if (ctx) { 2115 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2116 return xmesa->xm_draw_buffer; 2117 } 2118 else { 2119 return 0; 2120 } 2121} 2122 2123 2124/* New in Mesa 3.1 */ 2125XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2126{ 2127 GET_CURRENT_CONTEXT(ctx); 2128 if (ctx) { 2129 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2130 return xmesa->xm_read_buffer; 2131 } 2132 else { 2133 return 0; 2134 } 2135} 2136 2137 2138GLboolean XMesaForceCurrent(XMesaContext c) 2139{ 2140 if (c) { 2141 if (&(c->mesa) != _mesa_get_current_context()) { 2142 _mesa_make_current(&(c->mesa), &c->xm_draw_buffer->mesa_buffer); 2143 } 2144 } 2145 else { 2146 _mesa_make_current(NULL, NULL); 2147 } 2148 return GL_TRUE; 2149} 2150 2151 2152GLboolean XMesaLoseCurrent(XMesaContext c) 2153{ 2154 (void) c; 2155 _mesa_make_current(NULL, NULL); 2156 return GL_TRUE; 2157} 2158 2159 2160/* 2161 * Switch 3Dfx support hack between window and full-screen mode. 2162 */ 2163GLboolean XMesaSetFXmode( GLint mode ) 2164{ 2165#ifdef FX 2166 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2167 if (fx && fx[0] != 'd') { 2168 GET_CURRENT_CONTEXT(ctx); 2169 GrHwConfiguration hw; 2170 if (!FX_grSstQueryHardware(&hw)) { 2171 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2172 return GL_FALSE; 2173 } 2174 if (hw.num_sst < 1) { 2175 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2176 return GL_FALSE; 2177 } 2178 if (ctx) { 2179 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2180 if (mode == XMESA_FX_WINDOW) { 2181 if (xmesa->xm_draw_buffer->FXisHackUsable) { 2182 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2183 xmesa->xm_draw_buffer->FXwindowHack = GL_TRUE; 2184 return GL_TRUE; 2185 } 2186 } 2187 else if (mode == XMESA_FX_FULLSCREEN) { 2188 FX_grSstControl(GR_CONTROL_ACTIVATE); 2189 xmesa->xm_draw_buffer->FXwindowHack = GL_FALSE; 2190 return GL_TRUE; 2191 } 2192 else { 2193 /* Error: Bad mode value */ 2194 } 2195 } 2196 } 2197 /*fprintf(stderr, "fallthrough\n");*/ 2198#else 2199 (void) mode; 2200#endif 2201 return GL_FALSE; 2202} 2203 2204 2205 2206#ifdef FX 2207/* 2208 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2209 */ 2210static void FXgetImage( XMesaBuffer b ) 2211{ 2212 GET_CURRENT_CONTEXT(ctx); 2213 static unsigned short pixbuf[MAX_WIDTH]; 2214 GLuint x, y; 2215 int xpos, ypos; 2216 XMesaWindow root; 2217 unsigned int bw, depth, width, height; 2218 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2219 2220#ifdef XFree86Server 2221 x = b->frontbuffer->x; 2222 y = b->frontbuffer->y; 2223 width = b->frontbuffer->width; 2224 height = b->frontbuffer->height; 2225 depth = b->frontbuffer->depth; 2226#else 2227 XGetGeometry( b->xm_visual->display, b->frontbuffer, 2228 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2229#endif 2230 if (b->width != width || b->height != height) { 2231 b->width = MIN2((int)width, b->FXctx->width); 2232 b->height = MIN2((int)height, b->FXctx->height); 2233 if (b->width & 1) 2234 b->width--; /* prevent odd width */ 2235 xmesa_alloc_back_buffer( b ); 2236 } 2237 2238 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2239 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2240 /* Special case: 16bpp RGB */ 2241 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2242 0, b->FXctx->height - b->height, /*pos*/ 2243 b->width, b->height, /* size */ 2244 b->width * sizeof(GLushort), /* stride */ 2245 b->backimage->data); /* dest buffer */ 2246 } 2247 else if (b->xm_visual->dithered_pf==PF_Dither 2248 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2249 /* Special case: 8bpp RGB */ 2250 for (y=0;y<b->height;y++) { 2251 GLubyte *ptr = (GLubyte*) b->backimage->data 2252 + b->backimage->bytes_per_line * y; 2253 XDITHER_SETUP(y); 2254 2255 /* read row from 3Dfx frame buffer */ 2256 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2257 0, b->FXctx->height-(b->height-y), 2258 b->width, 1, 2259 0, 2260 pixbuf ); 2261 2262 /* write to XImage back buffer */ 2263 for (x=0;x<b->width;x++) { 2264 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2265 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2266 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2267 *ptr++ = XDITHER( x, r, g, b); 2268 } 2269 } 2270 } 2271 else { 2272 /* General case: slow! */ 2273 for (y=0;y<b->height;y++) { 2274 /* read row from 3Dfx frame buffer */ 2275 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2276 0, b->FXctx->height-(b->height-y), 2277 b->width, 1, 2278 0, 2279 pixbuf ); 2280 2281 /* write to XImage back buffer */ 2282 for (x=0;x<b->width;x++) { 2283 XMesaPutPixel(b->backimage,x,y, 2284 xmesa_color_to_pixel(xmesa, 2285 (pixbuf[x] & 0xf800) >> 8, 2286 (pixbuf[x] & 0x07e0) >> 3, 2287 (pixbuf[x] & 0x001f) << 3, 2288 0xff, 2289 b->xm_visual->undithered_pf)); 2290 } 2291 } 2292 } 2293 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2294} 2295#endif 2296 2297 2298/* 2299 * Copy the back buffer to the front buffer. If there's no back buffer 2300 * this is a no-op. 2301 */ 2302void XMesaSwapBuffers( XMesaBuffer b ) 2303{ 2304 GET_CURRENT_CONTEXT(ctx); 2305 2306 /* If we're swapping the buffer associated with the current context 2307 * we have to flush any pending rendering commands first. 2308 */ 2309 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2310 _mesa_notifySwapBuffers(ctx); 2311 2312 if (b->db_state) { 2313#ifdef FX 2314 if (b->FXctx) { 2315 fxMesaSwapBuffers(); 2316 2317 if (b->FXwindowHack) 2318 FXgetImage(b); 2319 else 2320 return; 2321 } 2322#endif 2323 if (b->backimage) { 2324 /* Copy Ximage from host's memory to server's window */ 2325#if defined(USE_XSHM) && !defined(XFree86Server) 2326 if (b->shm) { 2327 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2328 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2329 b->swapgc, 2330 b->backimage, 0, 0, 2331 0, 0, b->width, b->height, False ); 2332 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2333 } 2334 else 2335#endif 2336 { 2337 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2338 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2339 b->swapgc, 2340 b->backimage, 0, 0, 2341 0, 0, b->width, b->height ); 2342 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2343 } 2344 } 2345 else { 2346 /* Copy pixmap to window on server */ 2347 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2348 XMesaCopyArea( b->xm_visual->display, 2349 b->backpixmap, /* source drawable */ 2350 b->frontbuffer, /* dest. drawable */ 2351 b->swapgc, 2352 0, 0, b->width, b->height, /* source region */ 2353 0, 0 /* dest region */ 2354 ); 2355 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2356 } 2357 } 2358#if !defined(XFree86Server) 2359 XSync( b->xm_visual->display, False ); 2360#endif 2361} 2362 2363 2364 2365/* 2366 * Copy sub-region of back buffer to front buffer 2367 */ 2368void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2369{ 2370 GET_CURRENT_CONTEXT(ctx); 2371 2372 /* If we're swapping the buffer associated with the current context 2373 * we have to flush any pending rendering commands first. 2374 */ 2375 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2376 _mesa_notifySwapBuffers(ctx); 2377 2378 if (b->db_state) { 2379 int yTop = b->height - y - height; 2380#ifdef FX 2381 if (b->FXctx) { 2382 fxMesaSwapBuffers(); 2383 if (b->FXwindowHack) 2384 FXgetImage(b); 2385 else 2386 return; 2387 } 2388#endif 2389 if (b->backimage) { 2390 /* Copy Ximage from host's memory to server's window */ 2391#if defined(USE_XSHM) && !defined(XFree86Server) 2392 if (b->shm) { 2393 /* XXX assuming width and height aren't too large! */ 2394 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2395 b->swapgc, 2396 b->backimage, x, yTop, 2397 x, yTop, width, height, False ); 2398 /* wait for finished event??? */ 2399 } 2400 else 2401#endif 2402 { 2403 /* XXX assuming width and height aren't too large! */ 2404 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2405 b->swapgc, 2406 b->backimage, x, yTop, 2407 x, yTop, width, height ); 2408 } 2409 } 2410 else { 2411 /* Copy pixmap to window on server */ 2412 XMesaCopyArea( b->xm_visual->display, 2413 b->backpixmap, /* source drawable */ 2414 b->frontbuffer, /* dest. drawable */ 2415 b->swapgc, 2416 x, yTop, width, height, /* source region */ 2417 x, yTop /* dest region */ 2418 ); 2419 } 2420 } 2421} 2422 2423 2424/* 2425 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2426 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2427 * back buffer directly. 2428 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2429 * ximage - pointer to back buffer's XImage, or NULL 2430 * Return: GL_TRUE = context is double buffered 2431 * GL_FALSE = context is single buffered 2432 */ 2433GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2434 XMesaPixmap *pixmap, 2435 XMesaImage **ximage ) 2436{ 2437 if (b->db_state) { 2438 if (pixmap) *pixmap = b->backpixmap; 2439 if (ximage) *ximage = b->backimage; 2440 return GL_TRUE; 2441 } 2442 else { 2443 *pixmap = 0; 2444 *ximage = NULL; 2445 return GL_FALSE; 2446 } 2447} 2448 2449 2450/* 2451 * Return the depth buffer associated with an XMesaBuffer. 2452 * Input: b - the XMesa buffer handle 2453 * Output: width, height - size of buffer in pixels 2454 * bytesPerValue - bytes per depth value (2 or 4) 2455 * buffer - pointer to depth buffer values 2456 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2457 */ 2458GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2459 GLint *bytesPerValue, void **buffer ) 2460{ 2461 if (!b->mesa_buffer.DepthBuffer) { 2462 *width = 0; 2463 *height = 0; 2464 *bytesPerValue = 0; 2465 *buffer = 0; 2466 return GL_FALSE; 2467 } 2468 else { 2469 *width = b->mesa_buffer.Width; 2470 *height = b->mesa_buffer.Height; 2471 *bytesPerValue = sizeof(GLdepth); 2472 *buffer = b->mesa_buffer.DepthBuffer; 2473 return GL_TRUE; 2474 } 2475} 2476 2477 2478void XMesaFlush( XMesaContext c ) 2479{ 2480 if (c && c->xm_visual) { 2481#ifdef XFree86Server 2482 /* NOT_NEEDED */ 2483#else 2484 XSync( c->xm_visual->display, False ); 2485#endif 2486 } 2487} 2488 2489 2490 2491const char *XMesaGetString( XMesaContext c, int name ) 2492{ 2493 (void) c; 2494 if (name==XMESA_VERSION) { 2495 return "5.0"; 2496 } 2497 else if (name==XMESA_EXTENSIONS) { 2498 return ""; 2499 } 2500 else { 2501 return NULL; 2502 } 2503} 2504 2505 2506 2507XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2508{ 2509 XMesaBuffer b; 2510 for (b=XMesaBufferList; b; b=b->Next) { 2511 if (b->frontbuffer==d && b->display==dpy) { 2512 return b; 2513 } 2514 } 2515 return NULL; 2516} 2517 2518 2519 2520/* 2521 * Look for XMesaBuffers whose X window has been destroyed. 2522 * Deallocate any such XMesaBuffers. 2523 */ 2524void XMesaGarbageCollect( void ) 2525{ 2526 XMesaBuffer b, next; 2527 for (b=XMesaBufferList; b; b=next) { 2528 next = b->Next; 2529 if (b->display && b->frontbuffer && b->type == WINDOW) { 2530#ifdef XFree86Server 2531 /* NOT_NEEDED */ 2532#else 2533 XSync(b->display, False); 2534 if (!window_exists( b->display, b->frontbuffer )) { 2535 /* found a dead window, free the ancillary info */ 2536 XMesaDestroyBuffer( b ); 2537 } 2538#endif 2539 } 2540 } 2541} 2542 2543 2544void XMesaReset( void ) 2545{ 2546 while (XMesaBufferList) 2547 XMesaDestroyBuffer(XMesaBufferList); 2548 2549 XMesaBufferList = NULL; 2550} 2551 2552 2553unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2554 GLfloat red, GLfloat green, 2555 GLfloat blue, GLfloat alpha ) 2556{ 2557 GLint r = (GLint) (red * 255.0F); 2558 GLint g = (GLint) (green * 255.0F); 2559 GLint b = (GLint) (blue * 255.0F); 2560 GLint a = (GLint) (alpha * 255.0F); 2561 2562 (void) DitherValues; /* silence warning */ 2563 2564 switch (xmesa->pixelformat) { 2565 case PF_Index: 2566 return 0; 2567 case PF_Truecolor: 2568 { 2569 unsigned long p; 2570 PACK_TRUECOLOR( p, r, g, b ); 2571 return p; 2572 } 2573 case PF_8A8B8G8R: 2574 return PACK_8A8B8G8R( r, g, b, a ); 2575 case PF_8R8G8B: 2576 return PACK_8R8G8B( r, g, b ); 2577 case PF_5R6G5B: 2578 return PACK_5R6G5B( r, g, b ); 2579 case PF_Dither: 2580 { 2581 DITHER_SETUP; 2582 return DITHER( x, y, r, g, b ); 2583 } 2584 case PF_1Bit: 2585 /* 382 = (3*255)/2 */ 2586 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2587 case PF_HPCR: 2588 return DITHER_HPCR(x, y, r, g, b); 2589 case PF_Lookup: 2590 { 2591 LOOKUP_SETUP; 2592 return LOOKUP( r, g, b ); 2593 } 2594 case PF_Grayscale: 2595 return GRAY_RGB( r, g, b ); 2596 case PF_Dither_5R6G5B: 2597 /* fall through */ 2598 case PF_Dither_True: 2599 { 2600 unsigned long p; 2601 PACK_TRUEDITHER(p, x, y, r, g, b); 2602 return p; 2603 } 2604 default: 2605 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2606 } 2607 return 0; 2608} 2609 2610 2611/* 2612 * This is typically called when the window size changes and we need 2613 * to reallocate the buffer's back/depth/stencil/accum buffers. 2614 */ 2615void XMesaResizeBuffers( XMesaBuffer b ) 2616{ 2617 xmesa_resize_buffers( &(b->mesa_buffer) ); 2618 2619} 2620 2621