xm_api.c revision 41bddcfa7bbc65bcd2fc60ada9761d3065e71388
1/* 2 * Mesa 3-D graphics library 3 * Version: 6.3 4 * 5 * Copyright (C) 1999-2005 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#include "tnl/t_context.h" 81#include "tnl/t_pipeline.h" 82#include "drivers/common/driverfuncs.h" 83 84#ifdef XFree86Server 85#include <GL/glxtokens.h> 86#endif 87 88/* 89 * Global X driver lock 90 */ 91_glthread_Mutex _xmesa_lock; 92 93 94 95/* 96 * Lookup tables for HPCR pixel format: 97 */ 98static short hpcr_rgbTbl[3][256] = { 99{ 100 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 101 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 102 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 103 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 104 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 105 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 106 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 107 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 108112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 109128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 110144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 111160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 112176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 113192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 114208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 115224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 116}, 117{ 118 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 119 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 120 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 121 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 122 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 123 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 124 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 125 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 126112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 127128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 128144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 129160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 130176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 131192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 132208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 133224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 134}, 135{ 136 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 137 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 138 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 139 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 140 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 141 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 142 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 143 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 144 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 145112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 146128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 147144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 148160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 149176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 150192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 151208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 152} 153}; 154 155 156 157/**********************************************************************/ 158/***** X Utility Functions *****/ 159/**********************************************************************/ 160 161 162/* 163 * Return the host's byte order as LSBFirst or MSBFirst ala X. 164 */ 165#ifndef XFree86Server 166static int host_byte_order( void ) 167{ 168 int i = 1; 169 char *cptr = (char *) &i; 170 return (*cptr==1) ? LSBFirst : MSBFirst; 171} 172#endif 173 174 175/* 176 * Error handling. 177 */ 178#ifndef XFree86Server 179static volatile int mesaXErrorFlag = 0; 180 181static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 182{ 183 (void) dpy; 184 (void) event; 185 mesaXErrorFlag = 1; 186 return 0; 187} 188#endif 189 190 191/* 192 * Check if the X Shared Memory extension is available. 193 * Return: 0 = not available 194 * 1 = shared XImage support available 195 * 2 = shared Pixmap support available also 196 */ 197#ifndef XFree86Server 198static int check_for_xshm( XMesaDisplay *display ) 199{ 200#ifdef USE_XSHM 201 int major, minor, ignore; 202 Bool pixmaps; 203 204 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 205 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 206 return (pixmaps==True) ? 2 : 1; 207 } 208 else { 209 return 0; 210 } 211 } 212 else { 213 return 0; 214 } 215#else 216 /* Can't compile XSHM support */ 217 return 0; 218#endif 219} 220#endif 221 222 223/* 224 * Apply gamma correction to an intensity value in [0..max]. Return the 225 * new intensity value. 226 */ 227static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 228{ 229 if (gamma == 1.0) { 230 return value; 231 } 232 else { 233 double x = (double) value / (double) max; 234 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 235 } 236} 237 238 239 240/* 241 * Return the true number of bits per pixel for XImages. 242 * For example, if we request a 24-bit deep visual we may actually need/get 243 * 32bpp XImages. This function returns the appropriate bpp. 244 * Input: dpy - the X display 245 * visinfo - desribes the visual to be used for XImages 246 * Return: true number of bits per pixel for XImages 247 */ 248#ifdef XFree86Server 249 250static int bits_per_pixel( XMesaVisual xmv ) 251{ 252 const int depth = xmv->nplanes; 253 int i; 254 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 255 if (screenInfo.formats[i].depth == depth) 256 return screenInfo.formats[i].bitsPerPixel; 257 } 258 return depth; /* should never get here, but this should be safe */ 259} 260 261#else 262 263static int bits_per_pixel( XMesaVisual xmv ) 264{ 265 XMesaDisplay *dpy = xmv->display; 266 XMesaVisualInfo visinfo = xmv->visinfo; 267 XMesaImage *img; 268 int bitsPerPixel; 269 /* Create a temporary XImage */ 270 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 271 ZPixmap, 0, /*format, offset*/ 272 (char*) MALLOC(8), /*data*/ 273 1, 1, /*width, height*/ 274 32, /*bitmap_pad*/ 275 0 /*bytes_per_line*/ 276 ); 277 assert(img); 278 /* grab the bits/pixel value */ 279 bitsPerPixel = img->bits_per_pixel; 280 /* free the XImage */ 281 FREE( img->data ); 282 img->data = NULL; 283 XMesaDestroyImage( img ); 284 return bitsPerPixel; 285} 286#endif 287 288 289 290/* 291 * Determine if a given X window ID is valid (window exists). 292 * Do this by calling XGetWindowAttributes() for the window and 293 * checking if we catch an X error. 294 * Input: dpy - the display 295 * win - the window to check for existance 296 * Return: GL_TRUE - window exists 297 * GL_FALSE - window doesn't exist 298 */ 299#ifndef XFree86Server 300static GLboolean WindowExistsFlag; 301 302static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 303{ 304 (void) dpy; 305 if (xerr->error_code == BadWindow) { 306 WindowExistsFlag = GL_FALSE; 307 } 308 return 0; 309} 310 311static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 312{ 313 XWindowAttributes wa; 314 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 315 WindowExistsFlag = GL_TRUE; 316 old_handler = XSetErrorHandler(window_exists_err_handler); 317 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 318 XSetErrorHandler(old_handler); 319 return WindowExistsFlag; 320} 321#endif 322 323 324 325/**********************************************************************/ 326/***** Linked list of XMesaBuffers *****/ 327/**********************************************************************/ 328 329static XMesaBuffer XMesaBufferList = NULL; 330 331 332/* Allocate a new XMesaBuffer, add to linked list */ 333static XMesaBuffer alloc_xmesa_buffer(void) 334{ 335 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 336 if (b) { 337 b->Next = XMesaBufferList; 338 XMesaBufferList = b; 339 } 340 return b; 341} 342 343 344/* 345 * Find an XMesaBuffer by matching X display and colormap but NOT matching 346 * the notThis buffer. 347 */ 348static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 349 XMesaColormap cmap, 350 XMesaBuffer notThis) 351{ 352 XMesaBuffer b; 353 for (b=XMesaBufferList; b; b=b->Next) { 354 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 355 return b; 356 } 357 } 358 return NULL; 359} 360 361 362/* 363 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 364 * entries. 365 */ 366static void free_xmesa_buffer(int client, XMesaBuffer buffer) 367{ 368 XMesaBuffer prev = NULL, b; 369 (void) client; 370 for (b=XMesaBufferList; b; b=b->Next) { 371 if (b==buffer) { 372 /* unlink bufer from list */ 373 if (prev) 374 prev->Next = buffer->Next; 375 else 376 XMesaBufferList = buffer->Next; 377 /* Check to free X colors */ 378 if (buffer->num_alloced>0) { 379 /* If no other buffer uses this X colormap then free the colors. */ 380 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 381#ifdef XFree86Server 382 (void)FreeColors(buffer->cmap, client, 383 buffer->num_alloced, buffer->alloced_colors, 384 0); 385#else 386 XFreeColors(buffer->display, buffer->cmap, 387 buffer->alloced_colors, buffer->num_alloced, 0); 388#endif 389 } 390 } 391 392 _mesa_free_framebuffer_data(&buffer->mesa_buffer); 393 FREE(buffer); 394 395 return; 396 } 397 /* continue search */ 398 prev = b; 399 } 400 /* buffer not found in XMesaBufferList */ 401 _mesa_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 402} 403 404 405/* Copy X color table stuff from one XMesaBuffer to another. */ 406static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 407{ 408 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 409 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 410 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 411 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 412 dst->num_alloced = src->num_alloced; 413 MEMCPY(dst->alloced_colors, src->alloced_colors, 414 sizeof(src->alloced_colors)); 415} 416 417 418 419/**********************************************************************/ 420/***** Misc Private Functions *****/ 421/**********************************************************************/ 422 423 424/* 425 * Return number of bits set in n. 426 */ 427static int bitcount( unsigned long n ) 428{ 429 int bits; 430 for (bits=0; n>0; n=n>>1) { 431 if (n&1) { 432 bits++; 433 } 434 } 435 return bits; 436} 437 438 439 440/* 441 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 442 * Return: GL_TRUE if success, GL_FALSE if error 443 */ 444#ifndef XFree86Server 445static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 446{ 447#ifdef USE_XSHM 448 /* 449 * We have to do a _lot_ of error checking here to be sure we can 450 * really use the XSHM extension. It seems different servers trigger 451 * errors at different points if the extension won't work. Therefore 452 * we have to be very careful... 453 */ 454 GC gc; 455 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 456 457 if (b->mesa_buffer.Width == 0 || b->mesa_buffer.Height == 0) { 458 /* this will be true the first time we're called on 'b' */ 459 return GL_FALSE; 460 } 461 462 b->backimage = XShmCreateImage(b->xm_visual->display, 463 b->xm_visual->visinfo->visual, 464 b->xm_visual->visinfo->depth, 465 ZPixmap, NULL, &b->shminfo, 466 b->mesa_buffer.Width, b->mesa_buffer.Height); 467 if (b->backimage == NULL) { 468 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 469 b->shm = 0; 470 return GL_FALSE; 471 } 472 473 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 474 * b->backimage->height, IPC_CREAT|0777 ); 475 if (b->shminfo.shmid < 0) { 476 _mesa_warning(NULL, "shmget failed while allocating back buffer"); 477 XDestroyImage( b->backimage ); 478 b->backimage = NULL; 479 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmget), disabling."); 480 b->shm = 0; 481 return GL_FALSE; 482 } 483 484 b->shminfo.shmaddr = b->backimage->data 485 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 486 if (b->shminfo.shmaddr == (char *) -1) { 487 _mesa_warning(NULL, "shmat() failed while allocating back buffer"); 488 XDestroyImage( b->backimage ); 489 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 490 b->backimage = NULL; 491 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmat), disabling."); 492 b->shm = 0; 493 return GL_FALSE; 494 } 495 496 b->shminfo.readOnly = False; 497 mesaXErrorFlag = 0; 498 old_handler = XSetErrorHandler( mesaHandleXError ); 499 /* This may trigger the X protocol error we're ready to catch: */ 500 XShmAttach( b->xm_visual->display, &b->shminfo ); 501 XSync( b->xm_visual->display, False ); 502 503 if (mesaXErrorFlag) { 504 /* we are on a remote display, this error is normal, don't print it */ 505 XFlush( b->xm_visual->display ); 506 mesaXErrorFlag = 0; 507 XDestroyImage( b->backimage ); 508 shmdt( b->shminfo.shmaddr ); 509 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 510 b->backimage = NULL; 511 b->shm = 0; 512 (void) XSetErrorHandler( old_handler ); 513 return GL_FALSE; 514 } 515 516 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 517 518 /* Finally, try an XShmPutImage to be really sure the extension works */ 519 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 520 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 521 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 522 XSync( b->xm_visual->display, False ); 523 XFreeGC( b->xm_visual->display, gc ); 524 (void) XSetErrorHandler( old_handler ); 525 if (mesaXErrorFlag) { 526 XFlush( b->xm_visual->display ); 527 mesaXErrorFlag = 0; 528 XDestroyImage( b->backimage ); 529 shmdt( b->shminfo.shmaddr ); 530 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 531 b->backimage = NULL; 532 b->shm = 0; 533 return GL_FALSE; 534 } 535 536 if (b->backimage) { 537 int height = b->backimage->height; 538 /* Needed by PIXELADDR1 macro */ 539 b->ximage_width1 = b->backimage->bytes_per_line; 540 b->ximage_origin1 = (GLubyte *) b->backimage->data 541 + b->ximage_width1 * (height-1); 542 /* Needed by PIXELADDR2 macro */ 543 b->ximage_width2 = b->backimage->bytes_per_line / 2; 544 b->ximage_origin2 = (GLushort *) b->backimage->data 545 + b->ximage_width2 * (height-1); 546 /* Needed by PIXELADDR3 macro */ 547 b->ximage_width3 = b->backimage->bytes_per_line; 548 b->ximage_origin3 = (GLubyte *) b->backimage->data 549 + b->ximage_width3 * (height-1); 550 /* Needed by PIXELADDR4 macro */ 551 b->ximage_width4 = b->backimage->width; 552 b->ximage_origin4 = (GLuint *) b->backimage->data 553 + b->ximage_width4 * (height-1); 554 } 555 556 return GL_TRUE; 557#else 558 /* Can't compile XSHM support */ 559 return GL_FALSE; 560#endif 561} 562#endif 563 564 565 566/* 567 * Setup an off-screen pixmap or Ximage to use as the back buffer. 568 * Input: b - the X/Mesa buffer 569 */ 570void xmesa_alloc_back_buffer( XMesaBuffer b ) 571{ 572 if (b->db_state==BACK_XIMAGE) { 573 /* Deallocate the old backimage, if any */ 574 if (b->backimage) { 575#if defined(USE_XSHM) && !defined(XFree86Server) 576 if (b->shm) { 577 XShmDetach( b->xm_visual->display, &b->shminfo ); 578 XDestroyImage( b->backimage ); 579 shmdt( b->shminfo.shmaddr ); 580 } 581 else 582#endif 583 XMesaDestroyImage( b->backimage ); 584 b->backimage = NULL; 585 } 586 587 /* Allocate new back buffer */ 588#ifdef XFree86Server 589 { 590 /* Allocate a regular XImage for the back buffer. */ 591 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 592 b->mesa_buffer.Width, 593 b->mesa_buffer.Height, NULL); 594#else 595 if (b->shm==0 || alloc_shm_back_buffer(b)==GL_FALSE) { 596 /* Allocate a regular XImage for the back buffer. */ 597 b->backimage = XCreateImage( b->xm_visual->display, 598 b->xm_visual->visinfo->visual, 599 GET_VISUAL_DEPTH(b->xm_visual), 600 ZPixmap, 0, /* format, offset */ 601 NULL, 602 b->mesa_buffer.Width, 603 b->mesa_buffer.Height, 604 8, 0 ); /* pad, bytes_per_line */ 605#endif 606 if (!b->backimage) { 607 _mesa_warning(NULL, "alloc_back_buffer: XCreateImage failed."); 608 } 609 b->backimage->data = (char *) MALLOC( b->backimage->height 610 * b->backimage->bytes_per_line ); 611 if (!b->backimage->data) { 612 _mesa_warning(NULL, "alloc_back_buffer: MALLOC failed."); 613 XMesaDestroyImage( b->backimage ); 614 b->backimage = NULL; 615 } 616 } 617 b->backpixmap = None; 618 } 619 else if (b->db_state==BACK_PIXMAP) { 620 XMesaPixmap old_pixmap = b->backpixmap; 621 /* Free the old back pixmap */ 622 if (b->backpixmap) { 623 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 624 } 625 /* Allocate new back pixmap */ 626 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 627 b->mesa_buffer.Width, 628 b->mesa_buffer.Height, 629 GET_VISUAL_DEPTH(b->xm_visual) ); 630 b->backimage = NULL; 631 /* update other references to backpixmap */ 632 if (b->buffer==(XMesaDrawable)old_pixmap) { 633 b->buffer = (XMesaDrawable)b->backpixmap; 634 } 635 } 636} 637 638 639 640/* 641 * A replacement for XAllocColor. This function should never 642 * fail to allocate a color. When XAllocColor fails, we return 643 * the nearest matching color. If we have to allocate many colors 644 * this function isn't too efficient; the XQueryColors() could be 645 * done just once. 646 * Written by Michael Pichler, Brian Paul, Mark Kilgard 647 * Input: dpy - X display 648 * cmap - X colormap 649 * cmapSize - size of colormap 650 * In/Out: color - the XColor struct 651 * Output: exact - 1=exact color match, 0=closest match 652 * alloced - 1=XAlloc worked, 0=XAlloc failed 653 */ 654static void 655noFaultXAllocColor( int client, 656 XMesaDisplay *dpy, 657 XMesaColormap cmap, 658 int cmapSize, 659 XMesaColor *color, 660 int *exact, int *alloced ) 661{ 662#ifdef XFree86Server 663 Pixel *ppixIn; 664 xrgb *ctable; 665#else 666 /* we'll try to cache ctable for better remote display performance */ 667 static Display *prevDisplay = NULL; 668 static XMesaColormap prevCmap = 0; 669 static int prevCmapSize = 0; 670 static XMesaColor *ctable = NULL; 671#endif 672 XMesaColor subColor; 673 int i, bestmatch; 674 double mindist; /* 3*2^16^2 exceeds long int precision. */ 675 676 (void) client; 677 678 /* First try just using XAllocColor. */ 679#ifdef XFree86Server 680 if (AllocColor(cmap, 681 &color->red, &color->green, &color->blue, 682 &color->pixel, 683 client) == Success) { 684#else 685 if (XAllocColor(dpy, cmap, color)) { 686#endif 687 *exact = 1; 688 *alloced = 1; 689 return; 690 } 691 692 /* Alloc failed, search for closest match */ 693 694 /* Retrieve color table entries. */ 695 /* XXX alloca candidate. */ 696#ifdef XFree86Server 697 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 698 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 699 for (i = 0; i < cmapSize; i++) { 700 ppixIn[i] = i; 701 } 702 QueryColors(cmap, cmapSize, ppixIn, ctable); 703#else 704 if (prevDisplay != dpy || prevCmap != cmap 705 || prevCmapSize != cmapSize || !ctable) { 706 /* free previously cached color table */ 707 if (ctable) 708 FREE(ctable); 709 /* Get the color table from X */ 710 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 711 assert(ctable); 712 for (i = 0; i < cmapSize; i++) { 713 ctable[i].pixel = i; 714 } 715 XQueryColors(dpy, cmap, ctable, cmapSize); 716 prevDisplay = dpy; 717 prevCmap = cmap; 718 prevCmapSize = cmapSize; 719 } 720#endif 721 722 /* Find best match. */ 723 bestmatch = -1; 724 mindist = 0.0; 725 for (i = 0; i < cmapSize; i++) { 726 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 727 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 728 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 729 double dist = dr * dr + dg * dg + db * db; 730 if (bestmatch < 0 || dist < mindist) { 731 bestmatch = i; 732 mindist = dist; 733 } 734 } 735 736 /* Return result. */ 737 subColor.red = ctable[bestmatch].red; 738 subColor.green = ctable[bestmatch].green; 739 subColor.blue = ctable[bestmatch].blue; 740 /* Try to allocate the closest match color. This should only 741 * fail if the cell is read/write. Otherwise, we're incrementing 742 * the cell's reference count. 743 */ 744#ifdef XFree86Server 745 if (AllocColor(cmap, 746 &subColor.red, &subColor.green, &subColor.blue, 747 &subColor.pixel, 748 client) == Success) { 749#else 750 if (XAllocColor(dpy, cmap, &subColor)) { 751#endif 752 *alloced = 1; 753 } 754 else { 755 /* do this to work around a problem reported by Frank Ortega */ 756 subColor.pixel = (unsigned long) bestmatch; 757 subColor.red = ctable[bestmatch].red; 758 subColor.green = ctable[bestmatch].green; 759 subColor.blue = ctable[bestmatch].blue; 760 subColor.flags = DoRed | DoGreen | DoBlue; 761 *alloced = 0; 762 } 763#ifdef XFree86Server 764 FREE(ppixIn); 765 FREE(ctable); 766#else 767 /* don't free table, save it for next time */ 768#endif 769 770 *color = subColor; 771 *exact = 0; 772} 773 774 775 776 777/* 778 * Do setup for PF_GRAYSCALE pixel format. 779 * Note that buffer may be NULL. 780 */ 781static GLboolean setup_grayscale( int client, XMesaVisual v, 782 XMesaBuffer buffer, XMesaColormap cmap ) 783{ 784 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 785 return GL_FALSE; 786 } 787 788 if (buffer) { 789 XMesaBuffer prevBuffer; 790 791 if (!cmap) { 792 return GL_FALSE; 793 } 794 795 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 796 if (prevBuffer && 797 (buffer->xm_visual->mesa_visual.rgbMode == 798 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 799 /* Copy colormap stuff from previous XMesaBuffer which uses same 800 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 801 */ 802 copy_colortable_info(buffer, prevBuffer); 803 } 804 else { 805 /* Allocate 256 shades of gray */ 806 int gray; 807 int colorsfailed = 0; 808 for (gray=0;gray<256;gray++) { 809 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 810 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 811 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 812 int exact, alloced; 813 XMesaColor xcol; 814 xcol.red = (r << 8) | r; 815 xcol.green = (g << 8) | g; 816 xcol.blue = (b << 8) | b; 817 noFaultXAllocColor( client, v->display, 818 cmap, GET_COLORMAP_SIZE(v), 819 &xcol, &exact, &alloced ); 820 if (!exact) { 821 colorsfailed++; 822 } 823 if (alloced) { 824 assert(buffer->num_alloced<256); 825 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 826 buffer->num_alloced++; 827 } 828 829 /*OLD 830 assert(gray < 576); 831 buffer->color_table[gray*3+0] = xcol.pixel; 832 buffer->color_table[gray*3+1] = xcol.pixel; 833 buffer->color_table[gray*3+2] = xcol.pixel; 834 assert(xcol.pixel < 65536); 835 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 836 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 837 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 838 */ 839 buffer->color_table[gray] = xcol.pixel; 840 assert(xcol.pixel < 65536); 841 buffer->pixel_to_r[xcol.pixel] = gray; 842 buffer->pixel_to_g[xcol.pixel] = gray; 843 buffer->pixel_to_b[xcol.pixel] = gray; 844 } 845 846 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 847 _mesa_warning(NULL, 848 "Note: %d out of 256 needed colors do not match exactly.\n", 849 colorsfailed ); 850 } 851 } 852 } 853 854 v->dithered_pf = PF_Grayscale; 855 v->undithered_pf = PF_Grayscale; 856 return GL_TRUE; 857} 858 859 860 861/* 862 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 863 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 864 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 865 * color. While this function was originally designed just for 8-bit 866 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 867 * Dithering code contributed by Bob Mercier. 868 */ 869static GLboolean setup_dithered_color( int client, XMesaVisual v, 870 XMesaBuffer buffer, XMesaColormap cmap ) 871{ 872 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 873 return GL_FALSE; 874 } 875 876 if (buffer) { 877 XMesaBuffer prevBuffer; 878 879 if (!cmap) { 880 return GL_FALSE; 881 } 882 883 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 884 if (prevBuffer && 885 (buffer->xm_visual->mesa_visual.rgbMode == 886 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 887 /* Copy colormap stuff from previous, matching XMesaBuffer. 888 * Do this to avoid time spent in noFaultXAllocColor. 889 */ 890 copy_colortable_info(buffer, prevBuffer); 891 } 892 else { 893 /* Allocate X colors and initialize color_table[], red_table[], etc */ 894 int r, g, b, i; 895 int colorsfailed = 0; 896 for (r = 0; r < DITH_R; r++) { 897 for (g = 0; g < DITH_G; g++) { 898 for (b = 0; b < DITH_B; b++) { 899 XMesaColor xcol; 900 int exact, alloced; 901 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 902 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 903 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 904 noFaultXAllocColor( client, v->display, 905 cmap, GET_COLORMAP_SIZE(v), 906 &xcol, &exact, &alloced ); 907 if (!exact) { 908 colorsfailed++; 909 } 910 if (alloced) { 911 assert(buffer->num_alloced<256); 912 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 913 buffer->num_alloced++; 914 } 915 i = DITH_MIX( r, g, b ); 916 assert(i < 576); 917 buffer->color_table[i] = xcol.pixel; 918 assert(xcol.pixel < 65536); 919 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 920 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 921 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 922 } 923 } 924 } 925 926 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 927 _mesa_warning(NULL, 928 "Note: %d out of %d needed colors do not match exactly.\n", 929 colorsfailed, DITH_R * DITH_G * DITH_B ); 930 } 931 } 932 } 933 934 v->dithered_pf = PF_Dither; 935 v->undithered_pf = PF_Lookup; 936 return GL_TRUE; 937} 938 939 940/* 941 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 942 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 943 * Special dithering tables have to be initialized. 944 */ 945static void setup_8bit_hpcr( XMesaVisual v ) 946{ 947 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 948 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 949 * on the root window AND the colormap obtainable by XGetRGBColormaps 950 * for that atom must be set on the window. (see also tkInitWindow) 951 * If that colormap is not set, the output will look stripy. 952 */ 953 954 /* Setup color tables with gamma correction */ 955 int i; 956 double g; 957 958 g = 1.0 / v->RedGamma; 959 for (i=0; i<256; i++) { 960 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 961 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 962 } 963 964 g = 1.0 / v->GreenGamma; 965 for (i=0; i<256; i++) { 966 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 967 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 968 } 969 970 g = 1.0 / v->BlueGamma; 971 for (i=0; i<256; i++) { 972 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 973 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 974 } 975 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 976 v->dithered_pf = PF_HPCR; 977 978 /* which method should I use to clear */ 979 /* GL_FALSE: keep the ordinary method */ 980 /* GL_TRUE : clear with dither pattern */ 981 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 982 983 if (v->hpcr_clear_flag) { 984 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 985 DefaultRootWindow(v->display), 986 16, 2, 8); 987#ifndef XFree86Server 988 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 989 0, 0, 16, 2, AllPlanes, ZPixmap); 990#endif 991 } 992} 993 994 995/* 996 * Setup RGB rendering for a window with a True/DirectColor visual. 997 */ 998static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 999 XMesaColormap cmap ) 1000{ 1001 unsigned long rmask, gmask, bmask; 1002 (void) buffer; 1003 (void) cmap; 1004 1005 /* Compute red multiplier (mask) and bit shift */ 1006 v->rshift = 0; 1007 rmask = GET_REDMASK(v); 1008 while ((rmask & 1)==0) { 1009 v->rshift++; 1010 rmask = rmask >> 1; 1011 } 1012 1013 /* Compute green multiplier (mask) and bit shift */ 1014 v->gshift = 0; 1015 gmask = GET_GREENMASK(v); 1016 while ((gmask & 1)==0) { 1017 v->gshift++; 1018 gmask = gmask >> 1; 1019 } 1020 1021 /* Compute blue multiplier (mask) and bit shift */ 1022 v->bshift = 0; 1023 bmask = GET_BLUEMASK(v); 1024 while ((bmask & 1)==0) { 1025 v->bshift++; 1026 bmask = bmask >> 1; 1027 } 1028 1029 /* 1030 * Compute component-to-pixel lookup tables and dithering kernel 1031 */ 1032 { 1033 static GLubyte kernel[16] = { 1034 0*16, 8*16, 2*16, 10*16, 1035 12*16, 4*16, 14*16, 6*16, 1036 3*16, 11*16, 1*16, 9*16, 1037 15*16, 7*16, 13*16, 5*16, 1038 }; 1039 GLint rBits = bitcount(rmask); 1040 GLint gBits = bitcount(gmask); 1041 GLint bBits = bitcount(bmask); 1042 GLint maxBits; 1043 GLuint i; 1044 1045 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1046 for (i=0; i<=rmask; i++) 1047 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1048 for (i=0; i<=gmask; i++) 1049 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1050 for (i=0; i<=bmask; i++) 1051 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1052 1053 /* convert RGB values from [0,255] to pixel components */ 1054 1055 for (i=0;i<256;i++) { 1056 GLint r = gamma_adjust(v->RedGamma, i, 255); 1057 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1058 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1059 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1060 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1061 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1062 } 1063 /* overflow protection */ 1064 for (i=256;i<512;i++) { 1065 v->RtoPixel[i] = v->RtoPixel[255]; 1066 v->GtoPixel[i] = v->GtoPixel[255]; 1067 v->BtoPixel[i] = v->BtoPixel[255]; 1068 } 1069 1070 /* setup dithering kernel */ 1071 maxBits = rBits; 1072 if (gBits > maxBits) maxBits = gBits; 1073 if (bBits > maxBits) maxBits = bBits; 1074 for (i=0;i<16;i++) { 1075 v->Kernel[i] = kernel[i] >> maxBits; 1076 } 1077 1078 v->undithered_pf = PF_Truecolor; 1079 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 1080 } 1081 1082 /* 1083 * Now check for TrueColor visuals which we can optimize. 1084 */ 1085 if ( GET_REDMASK(v) ==0x0000ff 1086 && GET_GREENMASK(v)==0x00ff00 1087 && GET_BLUEMASK(v) ==0xff0000 1088 && CHECK_BYTE_ORDER(v) 1089 && v->BitsPerPixel==32 1090 && sizeof(GLuint)==4 1091 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1092 /* common 32 bpp config used on SGI, Sun */ 1093 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1094 } 1095 else if (GET_REDMASK(v) ==0xff0000 1096 && GET_GREENMASK(v)==0x00ff00 1097 && GET_BLUEMASK(v) ==0x0000ff 1098 && CHECK_BYTE_ORDER(v) 1099 && v->BitsPerPixel==32 1100 && sizeof(GLuint)==4 1101 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1102 /* common 32 bpp config used on Linux, HP, IBM */ 1103 if (GET_VISUAL_DEPTH(v)==32) 1104 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; 1105 else 1106 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1107 } 1108 else if (GET_REDMASK(v) ==0xff0000 1109 && GET_GREENMASK(v)==0x00ff00 1110 && GET_BLUEMASK(v) ==0x0000ff 1111 && CHECK_BYTE_ORDER(v) 1112 && v->BitsPerPixel==24 1113 && sizeof(GLuint)==4 1114 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1115 /* common packed 24 bpp config used on Linux */ 1116 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1117 } 1118 else if (GET_REDMASK(v) ==0xf800 1119 && GET_GREENMASK(v)==0x07e0 1120 && GET_BLUEMASK(v) ==0x001f 1121 && CHECK_BYTE_ORDER(v) 1122 && v->BitsPerPixel==16 1123 && sizeof(GLushort)==2 1124 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1125 /* 5-6-5 color weight on common PC VGA boards */ 1126 v->undithered_pf = PF_5R6G5B; 1127 v->dithered_pf = PF_Dither_5R6G5B; 1128 } 1129 else if (GET_REDMASK(v) ==0xe0 1130 && GET_GREENMASK(v)==0x1c 1131 && GET_BLUEMASK(v) ==0x03 1132 && CHECK_FOR_HPCR(v)) { 1133 setup_8bit_hpcr( v ); 1134 } 1135} 1136 1137 1138 1139/* 1140 * Setup RGB rendering for a window with a monochrome visual. 1141 */ 1142static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1143{ 1144 (void) b; 1145 v->dithered_pf = v->undithered_pf = PF_1Bit; 1146 /* if black=1 then we must flip pixel values */ 1147 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1148} 1149 1150 1151 1152/* 1153 * When a context is "made current" for the first time, we can finally 1154 * finish initializing the context's visual and buffer information. 1155 * Input: v - the XMesaVisual to initialize 1156 * b - the XMesaBuffer to initialize (may be NULL) 1157 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1158 * window - the window/pixmap we're rendering into 1159 * cmap - the colormap associated with the window/pixmap 1160 * Return: GL_TRUE=success, GL_FALSE=failure 1161 */ 1162static GLboolean initialize_visual_and_buffer( int client, 1163 XMesaVisual v, 1164 XMesaBuffer b, 1165 GLboolean rgb_flag, 1166 XMesaDrawable window, 1167 XMesaColormap cmap ) 1168{ 1169#ifndef XFree86Server 1170 XGCValues gcvalues; 1171#endif 1172 1173 if (b) { 1174 assert(b->xm_visual == v); 1175 } 1176 1177 /* Save true bits/pixel */ 1178 v->BitsPerPixel = bits_per_pixel(v); 1179 assert(v->BitsPerPixel > 0); 1180 1181 1182 if (rgb_flag==GL_FALSE) { 1183 /* COLOR-INDEXED WINDOW: 1184 * Even if the visual is TrueColor or DirectColor we treat it as 1185 * being color indexed. This is weird but might be useful to someone. 1186 */ 1187 v->dithered_pf = v->undithered_pf = PF_Index; 1188 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1189 } 1190 else { 1191 /* RGB WINDOW: 1192 * We support RGB rendering into almost any kind of visual. 1193 */ 1194 const int xclass = v->mesa_visual.visualType; 1195 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1196 setup_truecolor( v, b, cmap ); 1197 } 1198 else if (xclass==GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v)==1) { 1199 setup_monochrome( v, b ); 1200 } 1201 else if (xclass==GLX_GRAY_SCALE || xclass==GLX_STATIC_GRAY) { 1202 if (!setup_grayscale( client, v, b, cmap )) { 1203 return GL_FALSE; 1204 } 1205 } 1206 else if ((xclass==GLX_PSEUDO_COLOR || xclass==GLX_STATIC_COLOR) 1207 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1208 if (!setup_dithered_color( client, v, b, cmap )) { 1209 return GL_FALSE; 1210 } 1211 } 1212 else { 1213 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual."); 1214 return GL_FALSE; 1215 } 1216 v->mesa_visual.indexBits = 0; 1217 1218 if (_mesa_getenv("MESA_NO_DITHER")) { 1219 v->dithered_pf = v->undithered_pf; 1220 } 1221 } 1222 1223 1224 /* 1225 * If MESA_INFO env var is set print out some debugging info 1226 * which can help Brian figure out what's going on when a user 1227 * reports bugs. 1228 */ 1229 if (_mesa_getenv("MESA_INFO")) { 1230 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1231 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1232 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1233 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1234 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1235 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1236 } 1237 1238 if (b && window) { 1239 /* Do window-specific initializations */ 1240 1241 b->frontbuffer = window; 1242 1243 /* Setup for single/double buffering */ 1244 if (v->mesa_visual.doubleBufferMode) { 1245 /* Double buffered */ 1246#ifndef XFree86Server 1247 b->shm = check_for_xshm( v->display ); 1248#endif 1249 xmesa_alloc_back_buffer( b ); 1250 if (b->db_state==BACK_PIXMAP) { 1251 b->buffer = (XMesaDrawable)b->backpixmap; 1252 } 1253 else { 1254 b->buffer = XIMAGE; 1255 } 1256 } 1257 else { 1258 /* Single Buffered */ 1259 b->buffer = b->frontbuffer; 1260 } 1261 1262 /* X11 graphics contexts */ 1263#ifdef XFree86Server 1264 b->gc = CreateScratchGC(v->display, window->depth); 1265#else 1266 b->gc = XCreateGC( v->display, window, 0, NULL ); 1267#endif 1268 XMesaSetFunction( v->display, b->gc, GXcopy ); 1269 1270 /* cleargc - for glClear() */ 1271#ifdef XFree86Server 1272 b->cleargc = CreateScratchGC(v->display, window->depth); 1273#else 1274 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1275#endif 1276 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1277 1278 /* 1279 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1280 * Patch contributed by Michael Pichler May 15, 1995. 1281 */ 1282#ifdef XFree86Server 1283 b->swapgc = CreateScratchGC(v->display, window->depth); 1284 { 1285 CARD32 v[1]; 1286 v[0] = FALSE; 1287 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1288 } 1289#else 1290 gcvalues.graphics_exposures = False; 1291 b->swapgc = XCreateGC( v->display, window, 1292 GCGraphicsExposures, &gcvalues); 1293#endif 1294 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1295 /* 1296 * Set fill style and tile pixmap once for all for HPCR stuff 1297 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1298 * Initialize whole stuff 1299 * Patch contributed by Jacques Leroy March 8, 1998. 1300 */ 1301 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1302 int i; 1303 for (i=0; i<16; i++) 1304 { 1305 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1306 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1307 } 1308 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1309 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1310 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1311 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1312 } 1313 1314 /* Initialize the row buffer XImage for use in write_color_span() */ 1315#ifdef XFree86Server 1316 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1317 (char *)MALLOC(MAX_WIDTH*4)); 1318#else 1319 b->rowimage = XCreateImage( v->display, 1320 v->visinfo->visual, 1321 v->visinfo->depth, 1322 ZPixmap, 0, /*format, offset*/ 1323 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1324 MAX_WIDTH, 1, /*width, height*/ 1325 32, /*bitmap_pad*/ 1326 0 /*bytes_per_line*/ ); 1327#endif 1328 if (!b->rowimage) 1329 return GL_FALSE; 1330 } 1331 1332 return GL_TRUE; 1333} 1334 1335 1336 1337/* 1338 * Convert an RGBA color to a pixel value. 1339 */ 1340unsigned long 1341xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1342 GLuint pixelFormat) 1343{ 1344 switch (pixelFormat) { 1345 case PF_Index: 1346 return 0; 1347 case PF_Truecolor: 1348 { 1349 unsigned long p; 1350 PACK_TRUECOLOR( p, r, g, b ); 1351 return p; 1352 } 1353 case PF_8A8B8G8R: 1354 return PACK_8A8B8G8R( r, g, b, a ); 1355 case PF_8A8R8G8B: 1356 return PACK_8A8R8G8B( r, g, b, a ); 1357 case PF_8R8G8B: 1358 /* fall through */ 1359 case PF_8R8G8B24: 1360 return PACK_8R8G8B( r, g, b ); 1361 case PF_5R6G5B: 1362 return PACK_5R6G5B( r, g, b ); 1363 case PF_Dither: 1364 { 1365 DITHER_SETUP; 1366 return DITHER( 1, 0, r, g, b ); 1367 } 1368 case PF_1Bit: 1369 /* 382 = (3*255)/2 */ 1370 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1371 case PF_HPCR: 1372 return DITHER_HPCR(1, 1, r, g, b); 1373 case PF_Lookup: 1374 { 1375 LOOKUP_SETUP; 1376 return LOOKUP( r, g, b ); 1377 } 1378 case PF_Grayscale: 1379 return GRAY_RGB( r, g, b ); 1380 case PF_Dither_True: 1381 /* fall through */ 1382 case PF_Dither_5R6G5B: 1383 { 1384 unsigned long p; 1385 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1386 return p; 1387 } 1388 default: 1389 _mesa_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1390 } 1391 return 0; 1392} 1393 1394 1395#define NUM_VISUAL_TYPES 6 1396 1397/** 1398 * Convert an X visual type to a GLX visual type. 1399 * 1400 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1401 * to be converted. 1402 * \return If \c visualType is a valid X visual type, a GLX visual type will 1403 * be returned. Otherwise \c GLX_NONE will be returned. 1404 * 1405 * \note 1406 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1407 * DRI CVS tree. 1408 */ 1409static GLint 1410xmesa_convert_from_x_visual_type( int visualType ) 1411{ 1412 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1413 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1414 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1415 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1416 }; 1417 1418 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1419 ? glx_visual_types[ visualType ] : GLX_NONE; 1420} 1421 1422 1423/**********************************************************************/ 1424/***** Public Functions *****/ 1425/**********************************************************************/ 1426 1427 1428/* 1429 * Create a new X/Mesa visual. 1430 * Input: display - X11 display 1431 * visinfo - an XVisualInfo pointer 1432 * rgb_flag - GL_TRUE = RGB mode, 1433 * GL_FALSE = color index mode 1434 * alpha_flag - alpha buffer requested? 1435 * db_flag - GL_TRUE = double-buffered, 1436 * GL_FALSE = single buffered 1437 * stereo_flag - stereo visual? 1438 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1439 * GL_FALSE = use an off-screen pixmap for back buffer 1440 * depth_size - requested bits/depth values, or zero 1441 * stencil_size - requested bits/stencil values, or zero 1442 * accum_red_size - requested bits/red accum values, or zero 1443 * accum_green_size - requested bits/green accum values, or zero 1444 * accum_blue_size - requested bits/blue accum values, or zero 1445 * accum_alpha_size - requested bits/alpha accum values, or zero 1446 * num_samples - number of samples/pixel if multisampling, or zero 1447 * level - visual level, usually 0 1448 * visualCaveat - ala the GLX extension, usually GLX_NONE 1449 * Return; a new XMesaVisual or 0 if error. 1450 */ 1451XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1452 XMesaVisualInfo visinfo, 1453 GLboolean rgb_flag, 1454 GLboolean alpha_flag, 1455 GLboolean db_flag, 1456 GLboolean stereo_flag, 1457 GLboolean ximage_flag, 1458 GLint depth_size, 1459 GLint stencil_size, 1460 GLint accum_red_size, 1461 GLint accum_green_size, 1462 GLint accum_blue_size, 1463 GLint accum_alpha_size, 1464 GLint num_samples, 1465 GLint level, 1466 GLint visualCaveat ) 1467{ 1468 char *gamma; 1469 XMesaVisual v; 1470 GLint red_bits, green_bits, blue_bits, alpha_bits; 1471 1472 /* For debugging only */ 1473 if (_mesa_getenv("MESA_XSYNC")) { 1474 /* This makes debugging X easier. 1475 * In your debugger, set a breakpoint on _XError to stop when an 1476 * X protocol error is generated. 1477 */ 1478#ifdef XFree86Server 1479 /* NOT_NEEDED */ 1480#else 1481 XSynchronize( display, 1 ); 1482#endif 1483 } 1484 1485 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1486 if (!v) { 1487 return NULL; 1488 } 1489 1490 /* 1491 * In the X server, NULL is passed in for the display. It will have 1492 * to be set before using this visual. See XMesaSetVisualDisplay() 1493 * below. 1494 */ 1495 v->display = display; 1496 1497 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1498 * the struct but we may need some of the information contained in it 1499 * at a later time. 1500 */ 1501#ifndef XFree86Server 1502 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1503 if(!v->visinfo) { 1504 FREE(v); 1505 return NULL; 1506 } 1507 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1508#endif 1509 1510 /* check for MESA_GAMMA environment variable */ 1511 gamma = _mesa_getenv("MESA_GAMMA"); 1512 if (gamma) { 1513 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1514 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1515 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1516 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1517 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1518 } 1519 else { 1520 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1521 } 1522 1523 v->ximage_flag = ximage_flag; 1524 1525#ifdef XFree86Server 1526 /* We could calculate these values by ourselves. nplanes is either the sum 1527 * of the red, green, and blue bits or the number index bits. 1528 * ColormapEntries is either (1U << index_bits) or 1529 * (1U << max(redBits, greenBits, blueBits)). 1530 */ 1531 v->nplanes = visinfo->nplanes; 1532 v->ColormapEntries = visinfo->ColormapEntries; 1533 1534 v->mesa_visual.redMask = visinfo->redMask; 1535 v->mesa_visual.greenMask = visinfo->greenMask; 1536 v->mesa_visual.blueMask = visinfo->blueMask; 1537 v->mesa_visual.visualID = visinfo->vid; 1538 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1539#else 1540 v->mesa_visual.redMask = visinfo->red_mask; 1541 v->mesa_visual.greenMask = visinfo->green_mask; 1542 v->mesa_visual.blueMask = visinfo->blue_mask; 1543 v->mesa_visual.visualID = visinfo->visualid; 1544 v->mesa_visual.screen = visinfo->screen; 1545#endif 1546 1547#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1548 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1549#else 1550 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1551#endif 1552 1553 v->mesa_visual.visualRating = visualCaveat; 1554 1555 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1556 1557 { 1558 const int xclass = v->mesa_visual.visualType; 1559 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1560 red_bits = bitcount(GET_REDMASK(v)); 1561 green_bits = bitcount(GET_GREENMASK(v)); 1562 blue_bits = bitcount(GET_BLUEMASK(v)); 1563 alpha_bits = 0; 1564 } 1565 else { 1566 /* this is an approximation */ 1567 int depth; 1568 depth = GET_VISUAL_DEPTH(v); 1569 red_bits = depth / 3; 1570 depth -= red_bits; 1571 green_bits = depth / 2; 1572 depth -= green_bits; 1573 blue_bits = depth; 1574 alpha_bits = 0; 1575 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1576 } 1577 } 1578 1579 if (alpha_flag && alpha_bits == 0) 1580 alpha_bits = 8; 1581 1582 _mesa_initialize_visual( &v->mesa_visual, 1583 rgb_flag, db_flag, stereo_flag, 1584 red_bits, green_bits, 1585 blue_bits, alpha_bits, 1586 v->mesa_visual.indexBits, 1587 depth_size, 1588 stencil_size, 1589 accum_red_size, accum_green_size, 1590 accum_blue_size, accum_alpha_size, 1591 0 ); 1592 1593 /* XXX minor hack */ 1594 v->mesa_visual.level = level; 1595 return v; 1596} 1597 1598 1599void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1600{ 1601 v->display = dpy; 1602} 1603 1604 1605void XMesaDestroyVisual( XMesaVisual v ) 1606{ 1607#ifndef XFree86Server 1608 FREE(v->visinfo); 1609#endif 1610 FREE(v); 1611} 1612 1613 1614 1615/** 1616 * Create a new XMesaContext. 1617 * \param v the XMesaVisual 1618 * \param share_list another XMesaContext with which to share display 1619 * lists or NULL if no sharing is wanted. 1620 * \return an XMesaContext or NULL if error. 1621 */ 1622XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1623{ 1624 static GLboolean firstTime = GL_TRUE; 1625 XMesaContext c; 1626 GLcontext *mesaCtx; 1627 struct dd_function_table functions; 1628 TNLcontext *tnl; 1629 1630 if (firstTime) { 1631 _glthread_INIT_MUTEX(_xmesa_lock); 1632 firstTime = GL_FALSE; 1633 } 1634 1635 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1636 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1637 if (!c) 1638 return NULL; 1639 1640 mesaCtx = &(c->mesa); 1641 1642 /* initialize with default driver functions, then plug in XMesa funcs */ 1643 _mesa_init_driver_functions(&functions); 1644 xmesa_init_driver_functions(v, &functions); 1645 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1646 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1647 &functions, (void *) c)) { 1648 FREE(c); 1649 return NULL; 1650 } 1651 1652 _mesa_enable_sw_extensions(mesaCtx); 1653 _mesa_enable_1_3_extensions(mesaCtx); 1654 _mesa_enable_1_4_extensions(mesaCtx); 1655 _mesa_enable_1_5_extensions(mesaCtx); 1656 _mesa_enable_2_0_extensions(mesaCtx); 1657#if SWTC 1658 if (c->Mesa_DXTn) { 1659 _mesa_enable_extension(c, "GL_EXT_texture_compression_s3tc"); 1660 _mesa_enable_extension(c, "GL_S3_s3tc"); 1661 } 1662 _mesa_enable_extension(c, "GL_3DFX_texture_compression_FXT1"); 1663#endif 1664 1665 /* finish up xmesa context initializations */ 1666 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1667 c->xm_visual = v; 1668 c->xm_draw_buffer = NULL; /* set later by XMesaMakeCurrent */ 1669 c->xm_read_buffer = NULL; /* set later by XMesaMakeCurrent */ 1670 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1671 c->display = v->display; 1672 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1673 1674 /* Initialize the software rasterizer and helper modules. 1675 */ 1676 if (!_swrast_CreateContext( mesaCtx ) || 1677 !_ac_CreateContext( mesaCtx ) || 1678 !_tnl_CreateContext( mesaCtx ) || 1679 !_swsetup_CreateContext( mesaCtx )) { 1680 _mesa_free_context_data(&c->mesa); 1681 _mesa_free(c); 1682 return NULL; 1683 } 1684 1685 /* tnl setup */ 1686 tnl = TNL_CONTEXT(mesaCtx); 1687 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1688 /* swrast setup */ 1689 xmesa_register_swrast_functions( mesaCtx ); 1690 _swsetup_Wakeup(mesaCtx); 1691 1692 return c; 1693} 1694 1695 1696 1697void XMesaDestroyContext( XMesaContext c ) 1698{ 1699 GLcontext *mesaCtx = &c->mesa; 1700#ifdef FX 1701 if (c->xm_draw_buffer && c->xm_buffer->FXctx) 1702 fxMesaDestroyContext(c->xm_draw_buffer->FXctx); 1703#endif 1704 _swsetup_DestroyContext( mesaCtx ); 1705 _swrast_DestroyContext( mesaCtx ); 1706 _tnl_DestroyContext( mesaCtx ); 1707 _ac_DestroyContext( mesaCtx ); 1708 _mesa_free_context_data( mesaCtx ); 1709 _mesa_free( c ); 1710} 1711 1712 1713 1714/* 1715 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1716 * Create a new XMesaBuffer from an X window. 1717 * Input: v - the XMesaVisual 1718 * w - the window 1719 * c - the context 1720 * Return: new XMesaBuffer or NULL if error 1721 */ 1722XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1723 XMesaContext c ) 1724{ 1725#ifndef XFree86Server 1726 XWindowAttributes attr; 1727#endif 1728#ifdef FX 1729 char *fxEnvVar; 1730#endif 1731 int client = 0; 1732 1733 XMesaBuffer b = alloc_xmesa_buffer(); 1734 if (!b) { 1735 return NULL; 1736 } 1737 1738 (void) c; 1739 1740#ifdef XFree86Server 1741 client = CLIENT_ID(((XMesaDrawable)w)->id); 1742#endif 1743 1744 assert(v); 1745 1746#ifdef XFree86Server 1747 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1748 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1749 GET_VISUAL_DEPTH(v), ((XMesaDrawable) w)->depth); 1750 return NULL; 1751 } 1752#else 1753 XGetWindowAttributes( v->display, w, &attr ); 1754 1755 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1756 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1757 GET_VISUAL_DEPTH(v), attr.depth); 1758 return NULL; 1759 } 1760#endif 1761 1762 b->xm_visual = v; 1763 b->type = WINDOW; 1764 b->display = v->display; 1765#ifdef XFree86Server 1766 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1767#else 1768 if (attr.colormap) { 1769 b->cmap = attr.colormap; 1770 } 1771 else { 1772 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1773 /* this is weird, a window w/out a colormap!? */ 1774 /* OK, let's just allocate a new one and hope for the best */ 1775 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1776 } 1777#endif 1778 1779 /* determine back buffer implementation */ 1780 if (v->mesa_visual.doubleBufferMode) { 1781 if (v->ximage_flag) { 1782 b->db_state = BACK_XIMAGE; 1783 } 1784 else { 1785 b->db_state = BACK_PIXMAP; 1786 } 1787 } 1788 else { 1789 b->db_state = 0; 1790 } 1791 1792 _mesa_initialize_framebuffer(&b->mesa_buffer, 1793 &v->mesa_visual, 1794 v->mesa_visual.depthBits > 0, 1795 v->mesa_visual.stencilBits > 0, 1796 v->mesa_visual.accumRedBits > 0, 1797 v->mesa_visual.alphaBits > 0 ); 1798 /* XXX hack */ 1799 b->mesa_buffer.UseSoftwareAuxBuffers = GL_TRUE; 1800 1801 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1802 (XMesaDrawable)w, b->cmap )) { 1803 free_xmesa_buffer(client, b); 1804 return NULL; 1805 } 1806 1807#ifdef FX 1808 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1809 if (fxEnvVar) { 1810 if (fxEnvVar[0]!='d') { 1811 int attribs[100]; 1812 int numAttribs = 0; 1813 int hw; 1814 if (v->mesa_visual.depthBits > 0) { 1815 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1816 attribs[numAttribs++] = v->mesa_visual.depthBits; 1817 } 1818 if (v->mesa_visual.doubleBufferMode) { 1819 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1820 } 1821 if (v->mesa_visual.accumRedBits > 0) { 1822 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1823 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1824 } 1825 if (v->mesa_visual.stencilBits > 0) { 1826 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1827 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1828 } 1829 if (v->mesa_visual.alphaBits > 0) { 1830 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1831 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1832 } 1833 if (1) { 1834 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1835 attribs[numAttribs++] = (int) &(c->mesa); 1836 } 1837 attribs[numAttribs++] = FXMESA_NONE; 1838 1839 /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ 1840 hw = fxMesaSelectCurrentBoard(0); 1841 1842 /* if these fail, there's a new bug somewhere */ 1843 ASSERT(b->mesa_buffer.Width > 0); 1844 ASSERT(b->mesa_buffer.Height > 0); 1845 1846 if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) { 1847 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1848 b->mesa_buffer.Height, attribs); 1849 if ((v->undithered_pf!=PF_Index) && (b->backimage)) { 1850 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1851 if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) { 1852 b->FXwindowHack = GL_TRUE; 1853 FX_grSstControl(GR_CONTROL_DEACTIVATE); 1854 } 1855 else { 1856 b->FXwindowHack = GL_FALSE; 1857 } 1858 } 1859 } 1860 else { 1861 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1862 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1863 GR_REFRESH_75Hz, attribs); 1864 else 1865 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1866 b->mesa_buffer.Height, attribs); 1867 b->FXisHackUsable = GL_FALSE; 1868 b->FXwindowHack = GL_FALSE; 1869 } 1870 /* 1871 fprintf(stderr, 1872 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1873 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1874 */ 1875 } 1876 } 1877 else { 1878 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1879 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1880 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1881 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1882 } 1883#endif 1884 1885 return b; 1886} 1887 1888 1889XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1890{ 1891 return XMesaCreateWindowBuffer2( v, w, NULL ); 1892} 1893 1894 1895/** 1896 * Create a new XMesaBuffer from an X pixmap. 1897 * 1898 * \param v the XMesaVisual 1899 * \param p the pixmap 1900 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1901 * \c GLX_DIRECT_COLOR visual for the pixmap 1902 * \returns new XMesaBuffer or NULL if error 1903 */ 1904XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1905 XMesaPixmap p, XMesaColormap cmap ) 1906{ 1907 int client = 0; 1908 XMesaBuffer b = alloc_xmesa_buffer(); 1909 if (!b) { 1910 return NULL; 1911 } 1912 1913 1914#ifdef XFree86Server 1915 client = CLIENT_ID(((XMesaDrawable)p)->id); 1916#endif 1917 1918 assert(v); 1919 1920 b->xm_visual = v; 1921 b->type = PIXMAP; 1922 b->display = v->display; 1923 b->cmap = cmap; 1924 1925 /* determine back buffer implementation */ 1926 if (v->mesa_visual.doubleBufferMode) { 1927 if (v->ximage_flag) { 1928 b->db_state = BACK_XIMAGE; 1929 } 1930 else { 1931 b->db_state = BACK_PIXMAP; 1932 } 1933 } 1934 else { 1935 b->db_state = 0; 1936 } 1937 1938 _mesa_initialize_framebuffer(&b->mesa_buffer, 1939 &v->mesa_visual, 1940 v->mesa_visual.depthBits > 0, 1941 v->mesa_visual.stencilBits > 0, 1942 v->mesa_visual.accumRedBits + 1943 v->mesa_visual.accumGreenBits + 1944 v->mesa_visual.accumBlueBits > 0, 1945 v->mesa_visual.alphaBits > 0 ); 1946 1947 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1948 (XMesaDrawable)p, cmap)) { 1949 free_xmesa_buffer(client, b); 1950 return NULL; 1951 } 1952 1953 return b; 1954} 1955 1956 1957 1958XMesaBuffer XMesaCreatePBuffer( XMesaVisual v, XMesaColormap cmap, 1959 unsigned int width, unsigned int height ) 1960{ 1961#ifdef XFree86Server 1962 return 0; 1963#else 1964 int client = 0; 1965 XMesaWindow root; 1966 XMesaDrawable drawable; /* X Pixmap Drawable */ 1967 XMesaBuffer b = alloc_xmesa_buffer(); 1968 if (!b) { 1969 return NULL; 1970 } 1971 1972 b->xm_visual = v; 1973 b->type = PBUFFER; 1974 b->display = v->display; 1975 b->cmap = cmap; 1976 1977 /* allocate pixmap for front buffer */ 1978 root = RootWindow( v->display, v->visinfo->screen ); 1979 drawable = XCreatePixmap( v->display, root, width, height, v->visinfo->depth ); 1980 1981 /* determine back buffer implementation */ 1982 if (v->mesa_visual.doubleBufferMode) { 1983 if (v->ximage_flag) { 1984 b->db_state = BACK_XIMAGE; 1985 } 1986 else { 1987 b->db_state = BACK_PIXMAP; 1988 } 1989 } 1990 else { 1991 b->db_state = 0; 1992 } 1993 1994 _mesa_initialize_framebuffer(&b->mesa_buffer, 1995 &v->mesa_visual, 1996 v->mesa_visual.depthBits > 0, 1997 v->mesa_visual.stencilBits > 0, 1998 v->mesa_visual.accumRedBits + 1999 v->mesa_visual.accumGreenBits + 2000 v->mesa_visual.accumBlueBits > 0, 2001 v->mesa_visual.alphaBits > 0 ); 2002 2003 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 2004 drawable, cmap)) { 2005 free_xmesa_buffer(client, b); 2006 return NULL; 2007 } 2008 2009 return b; 2010#endif 2011} 2012 2013 2014 2015/* 2016 * Deallocate an XMesaBuffer structure and all related info. 2017 */ 2018void XMesaDestroyBuffer( XMesaBuffer b ) 2019{ 2020 int client = 0; 2021 2022#ifdef XFree86Server 2023 if (b->frontbuffer) 2024 client = CLIENT_ID(b->frontbuffer->id); 2025#endif 2026 2027 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 2028 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 2029 if (b->swapgc) XMesaFreeGC( b->xm_visual->display, b->swapgc ); 2030 2031 if (b->backimage) { 2032#if defined(USE_XSHM) && !defined(XFree86Server) 2033 if (b->shm) { 2034 XShmDetach( b->xm_visual->display, &b->shminfo ); 2035 XDestroyImage( b->backimage ); 2036 shmdt( b->shminfo.shmaddr ); 2037 } 2038 else 2039#endif 2040 XMesaDestroyImage( b->backimage ); 2041 } 2042 if (b->backpixmap) { 2043 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 2044 if (b->xm_visual->hpcr_clear_flag) { 2045 XMesaFreePixmap( b->xm_visual->display, 2046 b->xm_visual->hpcr_clear_pixmap ); 2047 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 2048 } 2049 } 2050 if (b->rowimage) { 2051 FREE( b->rowimage->data ); 2052 b->rowimage->data = NULL; 2053 XMesaDestroyImage( b->rowimage ); 2054 } 2055 2056 free_xmesa_buffer(client, b); 2057} 2058 2059 2060 2061/* 2062 * Bind buffer b to context c and make c the current rendering context. 2063 */ 2064GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2065{ 2066 return XMesaMakeCurrent2( c, b, b ); 2067} 2068 2069 2070/* 2071 * Bind buffer b to context c and make c the current rendering context. 2072 */ 2073GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2074 XMesaBuffer readBuffer ) 2075{ 2076 if (c) { 2077 if (!drawBuffer || !readBuffer) 2078 return GL_FALSE; /* must specify buffers! */ 2079 2080#ifdef FX 2081 if (drawBuffer->FXctx) { 2082 fxMesaMakeCurrent(drawBuffer->FXctx); 2083 2084 c->xm_draw_buffer = drawBuffer; 2085 c->xm_read_buffer = readBuffer; 2086 c->xm_buffer = drawBuffer; 2087 2088 return GL_TRUE; 2089 } 2090#endif 2091 if (&(c->mesa) == _mesa_get_current_context() 2092 && c->xm_draw_buffer == drawBuffer 2093 && c->xm_read_buffer == readBuffer 2094 && c->xm_draw_buffer->wasCurrent) { 2095 /* same context and buffer, do nothing */ 2096 return GL_TRUE; 2097 } 2098 2099 c->xm_draw_buffer = drawBuffer; 2100 c->xm_read_buffer = readBuffer; 2101 c->xm_buffer = drawBuffer; 2102 2103 _mesa_make_current2(&(c->mesa), 2104 &drawBuffer->mesa_buffer, 2105 &readBuffer->mesa_buffer); 2106 2107 if (c->xm_visual->mesa_visual.rgbMode) { 2108 /* 2109 * Must recompute and set these pixel values because colormap 2110 * can be different for different windows. 2111 */ 2112 c->clearpixel = xmesa_color_to_pixel( c, 2113 c->clearcolor[0], 2114 c->clearcolor[1], 2115 c->clearcolor[2], 2116 c->clearcolor[3], 2117 c->xm_visual->undithered_pf); 2118 XMesaSetForeground(c->display, c->xm_draw_buffer->cleargc, c->clearpixel); 2119 } 2120 2121 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2122 c->xm_draw_buffer->wasCurrent = GL_TRUE; 2123 } 2124 else { 2125 /* Detach */ 2126 _mesa_make_current2( NULL, NULL, NULL ); 2127 } 2128 return GL_TRUE; 2129} 2130 2131 2132/* 2133 * Unbind the context c from its buffer. 2134 */ 2135GLboolean XMesaUnbindContext( XMesaContext c ) 2136{ 2137 /* A no-op for XFree86 integration purposes */ 2138 return GL_TRUE; 2139} 2140 2141 2142XMesaContext XMesaGetCurrentContext( void ) 2143{ 2144 GET_CURRENT_CONTEXT(ctx); 2145 if (ctx) { 2146 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2147 return xmesa; 2148 } 2149 else { 2150 return 0; 2151 } 2152} 2153 2154 2155XMesaBuffer XMesaGetCurrentBuffer( void ) 2156{ 2157 GET_CURRENT_CONTEXT(ctx); 2158 if (ctx) { 2159 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2160 return xmesa->xm_draw_buffer; 2161 } 2162 else { 2163 return 0; 2164 } 2165} 2166 2167 2168/* New in Mesa 3.1 */ 2169XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2170{ 2171 GET_CURRENT_CONTEXT(ctx); 2172 if (ctx) { 2173 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2174 return xmesa->xm_read_buffer; 2175 } 2176 else { 2177 return 0; 2178 } 2179} 2180 2181 2182GLboolean XMesaForceCurrent(XMesaContext c) 2183{ 2184 if (c) { 2185 if (&(c->mesa) != _mesa_get_current_context()) { 2186 _mesa_make_current(&(c->mesa), &c->xm_draw_buffer->mesa_buffer); 2187 } 2188 } 2189 else { 2190 _mesa_make_current(NULL, NULL); 2191 } 2192 return GL_TRUE; 2193} 2194 2195 2196GLboolean XMesaLoseCurrent(XMesaContext c) 2197{ 2198 (void) c; 2199 _mesa_make_current(NULL, NULL); 2200 return GL_TRUE; 2201} 2202 2203 2204/* 2205 * Switch 3Dfx support hack between window and full-screen mode. 2206 */ 2207GLboolean XMesaSetFXmode( GLint mode ) 2208{ 2209#ifdef FX 2210 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2211 if (fx && fx[0] != 'd') { 2212 GET_CURRENT_CONTEXT(ctx); 2213 GrHwConfiguration hw; 2214 if (!FX_grSstQueryHardware(&hw)) { 2215 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2216 return GL_FALSE; 2217 } 2218 if (hw.num_sst < 1) { 2219 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2220 return GL_FALSE; 2221 } 2222 if (ctx) { 2223 /* [dBorca] Hack alert: 2224 * oh, this is sooo wrong: ctx above is 2225 * really an fxMesaContext, not an XMesaContext 2226 */ 2227 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2228 if (mode == XMESA_FX_WINDOW) { 2229 if (xmesa->xm_draw_buffer->FXisHackUsable) { 2230 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2231 xmesa->xm_draw_buffer->FXwindowHack = GL_TRUE; 2232 return GL_TRUE; 2233 } 2234 } 2235 else if (mode == XMESA_FX_FULLSCREEN) { 2236 FX_grSstControl(GR_CONTROL_ACTIVATE); 2237 xmesa->xm_draw_buffer->FXwindowHack = GL_FALSE; 2238 return GL_TRUE; 2239 } 2240 else { 2241 /* Error: Bad mode value */ 2242 } 2243 } 2244 } 2245 /*fprintf(stderr, "fallthrough\n");*/ 2246#else 2247 (void) mode; 2248#endif 2249 return GL_FALSE; 2250} 2251 2252 2253 2254#ifdef FX 2255/* 2256 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2257 */ 2258static void FXgetImage( XMesaBuffer b ) 2259{ 2260 GET_CURRENT_CONTEXT(ctx); 2261 static unsigned short pixbuf[MAX_WIDTH]; 2262 GLuint x, y; 2263 int xpos, ypos; 2264 XMesaWindow root; 2265 unsigned int bw, depth, width, height; 2266 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2267 2268#ifdef XFree86Server 2269 x = b->frontbuffer->x; 2270 y = b->frontbuffer->y; 2271 width = b->frontbuffer->width; 2272 height = b->frontbuffer->height; 2273 depth = b->frontbuffer->depth; 2274#else 2275 XGetGeometry( b->xm_visual->display, b->frontbuffer, 2276 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2277#endif 2278 if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) { 2279 b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width); 2280 b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height); 2281 if (b->mesa_buffer.Width & 1) 2282 b->mesa_buffer.Width--; /* prevent odd width */ 2283 xmesa_alloc_back_buffer( b ); 2284 } 2285 2286 /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */ 2287 /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */ 2288 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2289 /* Special case: 16bpp RGB */ 2290 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2291 0, b->FXctx->height - b->mesa_buffer.Height, /*pos*/ 2292 b->mesa_buffer.Width, b->mesa_buffer.Height, /* size */ 2293 b->mesa_buffer.Width * sizeof(GLushort), /* stride */ 2294 b->backimage->data); /* dest buffer */ 2295 } 2296 else if (b->xm_visual->dithered_pf==PF_Dither 2297 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2298 /* Special case: 8bpp RGB */ 2299 for (y=0;y<b->mesa_buffer.Height;y++) { 2300 GLubyte *ptr = (GLubyte*) b->backimage->data 2301 + b->backimage->bytes_per_line * y; 2302 XDITHER_SETUP(y); 2303 2304 /* read row from 3Dfx frame buffer */ 2305 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2306 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2307 b->mesa_buffer.Width, 1, 2308 0, 2309 pixbuf ); 2310 2311 /* write to XImage back buffer */ 2312 for (x=0;x<b->mesa_buffer.Width;x++) { 2313 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2314 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2315 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2316 *ptr++ = XDITHER( x, r, g, b); 2317 } 2318 } 2319 } 2320 else { 2321 /* General case: slow! */ 2322 for (y=0;y<b->mesa_buffer.Height;y++) { 2323 /* read row from 3Dfx frame buffer */ 2324 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2325 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2326 b->mesa_buffer.Width, 1, 2327 0, 2328 pixbuf ); 2329 2330 /* write to XImage back buffer */ 2331 for (x=0;x<b->mesa_buffer.Width;x++) { 2332 XMesaPutPixel(b->backimage,x,y, 2333 xmesa_color_to_pixel(xmesa, 2334 (pixbuf[x] & 0xf800) >> 8, 2335 (pixbuf[x] & 0x07e0) >> 3, 2336 (pixbuf[x] & 0x001f) << 3, 2337 0xff, 2338 b->xm_visual->undithered_pf)); 2339 } 2340 } 2341 } 2342 /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */ 2343} 2344#endif 2345 2346 2347/* 2348 * Copy the back buffer to the front buffer. If there's no back buffer 2349 * this is a no-op. 2350 */ 2351void XMesaSwapBuffers( XMesaBuffer b ) 2352{ 2353 GET_CURRENT_CONTEXT(ctx); 2354 2355 /* If we're swapping the buffer associated with the current context 2356 * we have to flush any pending rendering commands first. 2357 */ 2358 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2359 _mesa_notifySwapBuffers(ctx); 2360 2361 if (b->db_state) { 2362#ifdef FX 2363 if (b->FXctx) { 2364 fxMesaSwapBuffers(); 2365 2366 if (b->FXwindowHack) 2367 FXgetImage(b); 2368 else 2369 return; 2370 } 2371#endif 2372 if (b->backimage) { 2373 /* Copy Ximage from host's memory to server's window */ 2374#if defined(USE_XSHM) && !defined(XFree86Server) 2375 if (b->shm) { 2376 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2377 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2378 b->swapgc, 2379 b->backimage, 0, 0, 2380 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2381 False ); 2382 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2383 } 2384 else 2385#endif 2386 { 2387 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2388 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2389 b->swapgc, 2390 b->backimage, 0, 0, 2391 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2392 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2393 } 2394 } 2395 else { 2396 /* Copy pixmap to window on server */ 2397 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2398 XMesaCopyArea( b->xm_visual->display, 2399 b->backpixmap, /* source drawable */ 2400 b->frontbuffer, /* dest. drawable */ 2401 b->swapgc, 2402 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2403 0, 0 /* dest region */ 2404 ); 2405 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2406 } 2407 } 2408#if !defined(XFree86Server) 2409 XSync( b->xm_visual->display, False ); 2410#endif 2411} 2412 2413 2414 2415/* 2416 * Copy sub-region of back buffer to front buffer 2417 */ 2418void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2419{ 2420 GET_CURRENT_CONTEXT(ctx); 2421 2422 /* If we're swapping the buffer associated with the current context 2423 * we have to flush any pending rendering commands first. 2424 */ 2425 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2426 _mesa_notifySwapBuffers(ctx); 2427 2428 if (b->db_state) { 2429 int yTop = b->mesa_buffer.Height - y - height; 2430#ifdef FX 2431 if (b->FXctx) { 2432 fxMesaSwapBuffers(); 2433 if (b->FXwindowHack) 2434 FXgetImage(b); 2435 else 2436 return; 2437 } 2438#endif 2439 if (b->backimage) { 2440 /* Copy Ximage from host's memory to server's window */ 2441#if defined(USE_XSHM) && !defined(XFree86Server) 2442 if (b->shm) { 2443 /* XXX assuming width and height aren't too large! */ 2444 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2445 b->swapgc, 2446 b->backimage, x, yTop, 2447 x, yTop, width, height, False ); 2448 /* wait for finished event??? */ 2449 } 2450 else 2451#endif 2452 { 2453 /* XXX assuming width and height aren't too large! */ 2454 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2455 b->swapgc, 2456 b->backimage, x, yTop, 2457 x, yTop, width, height ); 2458 } 2459 } 2460 else { 2461 /* Copy pixmap to window on server */ 2462 XMesaCopyArea( b->xm_visual->display, 2463 b->backpixmap, /* source drawable */ 2464 b->frontbuffer, /* dest. drawable */ 2465 b->swapgc, 2466 x, yTop, width, height, /* source region */ 2467 x, yTop /* dest region */ 2468 ); 2469 } 2470 } 2471} 2472 2473 2474/* 2475 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2476 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2477 * back buffer directly. 2478 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2479 * ximage - pointer to back buffer's XImage, or NULL 2480 * Return: GL_TRUE = context is double buffered 2481 * GL_FALSE = context is single buffered 2482 */ 2483GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2484 XMesaPixmap *pixmap, 2485 XMesaImage **ximage ) 2486{ 2487 if (b->db_state) { 2488 if (pixmap) *pixmap = b->backpixmap; 2489 if (ximage) *ximage = b->backimage; 2490 return GL_TRUE; 2491 } 2492 else { 2493 *pixmap = 0; 2494 *ximage = NULL; 2495 return GL_FALSE; 2496 } 2497} 2498 2499 2500/* 2501 * Return the depth buffer associated with an XMesaBuffer. 2502 * Input: b - the XMesa buffer handle 2503 * Output: width, height - size of buffer in pixels 2504 * bytesPerValue - bytes per depth value (2 or 4) 2505 * buffer - pointer to depth buffer values 2506 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2507 */ 2508GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2509 GLint *bytesPerValue, void **buffer ) 2510{ 2511 if (!b->mesa_buffer.DepthBuffer) { 2512 *width = 0; 2513 *height = 0; 2514 *bytesPerValue = 0; 2515 *buffer = 0; 2516 return GL_FALSE; 2517 } 2518 else { 2519 *width = b->mesa_buffer.Width; 2520 *height = b->mesa_buffer.Height; 2521 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2522 ? sizeof(GLushort) : sizeof(GLuint); 2523 *buffer = b->mesa_buffer.DepthBuffer; 2524 return GL_TRUE; 2525 } 2526} 2527 2528 2529void XMesaFlush( XMesaContext c ) 2530{ 2531 if (c && c->xm_visual) { 2532#ifdef XFree86Server 2533 /* NOT_NEEDED */ 2534#else 2535 XSync( c->xm_visual->display, False ); 2536#endif 2537 } 2538} 2539 2540 2541 2542const char *XMesaGetString( XMesaContext c, int name ) 2543{ 2544 (void) c; 2545 if (name==XMESA_VERSION) { 2546 return "5.0"; 2547 } 2548 else if (name==XMESA_EXTENSIONS) { 2549 return ""; 2550 } 2551 else { 2552 return NULL; 2553 } 2554} 2555 2556 2557 2558XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2559{ 2560 XMesaBuffer b; 2561 for (b=XMesaBufferList; b; b=b->Next) { 2562 if (b->frontbuffer==d && b->display==dpy) { 2563 return b; 2564 } 2565 } 2566 return NULL; 2567} 2568 2569 2570 2571/* 2572 * Look for XMesaBuffers whose X window has been destroyed. 2573 * Deallocate any such XMesaBuffers. 2574 */ 2575void XMesaGarbageCollect( void ) 2576{ 2577 XMesaBuffer b, next; 2578 for (b=XMesaBufferList; b; b=next) { 2579 next = b->Next; 2580 if (b->display && b->frontbuffer && b->type == WINDOW) { 2581#ifdef XFree86Server 2582 /* NOT_NEEDED */ 2583#else 2584 XSync(b->display, False); 2585 if (!window_exists( b->display, b->frontbuffer )) { 2586 /* found a dead window, free the ancillary info */ 2587 XMesaDestroyBuffer( b ); 2588 } 2589#endif 2590 } 2591 } 2592} 2593 2594 2595void XMesaReset( void ) 2596{ 2597 while (XMesaBufferList) 2598 XMesaDestroyBuffer(XMesaBufferList); 2599 2600 XMesaBufferList = NULL; 2601} 2602 2603 2604unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2605 GLfloat red, GLfloat green, 2606 GLfloat blue, GLfloat alpha ) 2607{ 2608 GLint r = (GLint) (red * 255.0F); 2609 GLint g = (GLint) (green * 255.0F); 2610 GLint b = (GLint) (blue * 255.0F); 2611 GLint a = (GLint) (alpha * 255.0F); 2612 2613 switch (xmesa->pixelformat) { 2614 case PF_Index: 2615 return 0; 2616 case PF_Truecolor: 2617 { 2618 unsigned long p; 2619 PACK_TRUECOLOR( p, r, g, b ); 2620 return p; 2621 } 2622 case PF_8A8B8G8R: 2623 return PACK_8A8B8G8R( r, g, b, a ); 2624 case PF_8A8R8G8B: 2625 return PACK_8A8R8G8B( r, g, b, a ); 2626 case PF_8R8G8B: 2627 return PACK_8R8G8B( r, g, b ); 2628 case PF_5R6G5B: 2629 return PACK_5R6G5B( r, g, b ); 2630 case PF_Dither: 2631 { 2632 DITHER_SETUP; 2633 return DITHER( x, y, r, g, b ); 2634 } 2635 case PF_1Bit: 2636 /* 382 = (3*255)/2 */ 2637 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2638 case PF_HPCR: 2639 return DITHER_HPCR(x, y, r, g, b); 2640 case PF_Lookup: 2641 { 2642 LOOKUP_SETUP; 2643 return LOOKUP( r, g, b ); 2644 } 2645 case PF_Grayscale: 2646 return GRAY_RGB( r, g, b ); 2647 case PF_Dither_5R6G5B: 2648 /* fall through */ 2649 case PF_Dither_True: 2650 { 2651 unsigned long p; 2652 PACK_TRUEDITHER(p, x, y, r, g, b); 2653 return p; 2654 } 2655 default: 2656 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2657 } 2658 return 0; 2659} 2660 2661 2662/* 2663 * This is typically called when the window size changes and we need 2664 * to reallocate the buffer's back/depth/stencil/accum buffers. 2665 */ 2666void XMesaResizeBuffers( XMesaBuffer b ) 2667{ 2668 xmesa_resize_buffers( &(b->mesa_buffer) ); 2669 2670} 2671 2672