xm_api.c revision a92100a3c6f13597b9f9c47987d232dadd4ebe93
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 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1104 } 1105 else if (GET_REDMASK(v) ==0xff0000 1106 && GET_GREENMASK(v)==0x00ff00 1107 && GET_BLUEMASK(v) ==0x0000ff 1108 && CHECK_BYTE_ORDER(v) 1109 && v->BitsPerPixel==24 1110 && sizeof(GLuint)==4 1111 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1112 /* common packed 24 bpp config used on Linux */ 1113 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1114 } 1115 else if (GET_REDMASK(v) ==0xf800 1116 && GET_GREENMASK(v)==0x07e0 1117 && GET_BLUEMASK(v) ==0x001f 1118 && CHECK_BYTE_ORDER(v) 1119 && v->BitsPerPixel==16 1120 && sizeof(GLushort)==2 1121 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1122 /* 5-6-5 color weight on common PC VGA boards */ 1123 v->undithered_pf = PF_5R6G5B; 1124 v->dithered_pf = PF_Dither_5R6G5B; 1125 } 1126 else if (GET_REDMASK(v) ==0xe0 1127 && GET_GREENMASK(v)==0x1c 1128 && GET_BLUEMASK(v) ==0x03 1129 && CHECK_FOR_HPCR(v)) { 1130 setup_8bit_hpcr( v ); 1131 } 1132} 1133 1134 1135 1136/* 1137 * Setup RGB rendering for a window with a monochrome visual. 1138 */ 1139static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1140{ 1141 (void) b; 1142 v->dithered_pf = v->undithered_pf = PF_1Bit; 1143 /* if black=1 then we must flip pixel values */ 1144 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1145} 1146 1147 1148 1149/* 1150 * When a context is "made current" for the first time, we can finally 1151 * finish initializing the context's visual and buffer information. 1152 * Input: v - the XMesaVisual to initialize 1153 * b - the XMesaBuffer to initialize (may be NULL) 1154 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1155 * window - the window/pixmap we're rendering into 1156 * cmap - the colormap associated with the window/pixmap 1157 * Return: GL_TRUE=success, GL_FALSE=failure 1158 */ 1159static GLboolean initialize_visual_and_buffer( int client, 1160 XMesaVisual v, 1161 XMesaBuffer b, 1162 GLboolean rgb_flag, 1163 XMesaDrawable window, 1164 XMesaColormap cmap ) 1165{ 1166#ifndef XFree86Server 1167 XGCValues gcvalues; 1168#endif 1169 1170 if (b) { 1171 assert(b->xm_visual == v); 1172 } 1173 1174 /* Save true bits/pixel */ 1175 v->BitsPerPixel = bits_per_pixel(v); 1176 assert(v->BitsPerPixel > 0); 1177 1178 1179 if (rgb_flag==GL_FALSE) { 1180 /* COLOR-INDEXED WINDOW: 1181 * Even if the visual is TrueColor or DirectColor we treat it as 1182 * being color indexed. This is weird but might be useful to someone. 1183 */ 1184 v->dithered_pf = v->undithered_pf = PF_Index; 1185 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1186 } 1187 else { 1188 /* RGB WINDOW: 1189 * We support RGB rendering into almost any kind of visual. 1190 */ 1191 const int xclass = v->mesa_visual.visualType; 1192 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1193 setup_truecolor( v, b, cmap ); 1194 } 1195 else if (xclass==GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v)==1) { 1196 setup_monochrome( v, b ); 1197 } 1198 else if (xclass==GLX_GRAY_SCALE || xclass==GLX_STATIC_GRAY) { 1199 if (!setup_grayscale( client, v, b, cmap )) { 1200 return GL_FALSE; 1201 } 1202 } 1203 else if ((xclass==GLX_PSEUDO_COLOR || xclass==GLX_STATIC_COLOR) 1204 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1205 if (!setup_dithered_color( client, v, b, cmap )) { 1206 return GL_FALSE; 1207 } 1208 } 1209 else { 1210 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual."); 1211 return GL_FALSE; 1212 } 1213 v->mesa_visual.indexBits = 0; 1214 1215 if (_mesa_getenv("MESA_NO_DITHER")) { 1216 v->dithered_pf = v->undithered_pf; 1217 } 1218 } 1219 1220 1221 /* 1222 * If MESA_INFO env var is set print out some debugging info 1223 * which can help Brian figure out what's going on when a user 1224 * reports bugs. 1225 */ 1226 if (_mesa_getenv("MESA_INFO")) { 1227 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1228 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1229 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1230 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1231 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1232 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1233 } 1234 1235 if (b && window) { 1236 /* Do window-specific initializations */ 1237 1238 b->frontbuffer = window; 1239 1240 /* Setup for single/double buffering */ 1241 if (v->mesa_visual.doubleBufferMode) { 1242 /* Double buffered */ 1243#ifndef XFree86Server 1244 b->shm = check_for_xshm( v->display ); 1245#endif 1246 xmesa_alloc_back_buffer( b ); 1247 if (b->db_state==BACK_PIXMAP) { 1248 b->buffer = (XMesaDrawable)b->backpixmap; 1249 } 1250 else { 1251 b->buffer = XIMAGE; 1252 } 1253 } 1254 else { 1255 /* Single Buffered */ 1256 b->buffer = b->frontbuffer; 1257 } 1258 1259 /* X11 graphics contexts */ 1260#ifdef XFree86Server 1261 b->gc = CreateScratchGC(v->display, window->depth); 1262#else 1263 b->gc = XCreateGC( v->display, window, 0, NULL ); 1264#endif 1265 XMesaSetFunction( v->display, b->gc, GXcopy ); 1266 1267 /* cleargc - for glClear() */ 1268#ifdef XFree86Server 1269 b->cleargc = CreateScratchGC(v->display, window->depth); 1270#else 1271 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1272#endif 1273 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1274 1275 /* 1276 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1277 * Patch contributed by Michael Pichler May 15, 1995. 1278 */ 1279#ifdef XFree86Server 1280 b->swapgc = CreateScratchGC(v->display, window->depth); 1281 { 1282 CARD32 v[1]; 1283 v[0] = FALSE; 1284 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1285 } 1286#else 1287 gcvalues.graphics_exposures = False; 1288 b->swapgc = XCreateGC( v->display, window, 1289 GCGraphicsExposures, &gcvalues); 1290#endif 1291 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1292 /* 1293 * Set fill style and tile pixmap once for all for HPCR stuff 1294 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1295 * Initialize whole stuff 1296 * Patch contributed by Jacques Leroy March 8, 1998. 1297 */ 1298 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1299 int i; 1300 for (i=0; i<16; i++) 1301 { 1302 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1303 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1304 } 1305 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1306 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1307 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1308 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1309 } 1310 1311 /* Initialize the row buffer XImage for use in write_color_span() */ 1312#ifdef XFree86Server 1313 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1314 (char *)MALLOC(MAX_WIDTH*4)); 1315#else 1316 b->rowimage = XCreateImage( v->display, 1317 v->visinfo->visual, 1318 v->visinfo->depth, 1319 ZPixmap, 0, /*format, offset*/ 1320 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1321 MAX_WIDTH, 1, /*width, height*/ 1322 32, /*bitmap_pad*/ 1323 0 /*bytes_per_line*/ ); 1324#endif 1325 if (!b->rowimage) 1326 return GL_FALSE; 1327 } 1328 1329 return GL_TRUE; 1330} 1331 1332 1333 1334/* 1335 * Convert an RGBA color to a pixel value. 1336 */ 1337unsigned long 1338xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1339 GLuint pixelFormat) 1340{ 1341 switch (pixelFormat) { 1342 case PF_Index: 1343 return 0; 1344 case PF_Truecolor: 1345 { 1346 unsigned long p; 1347 PACK_TRUECOLOR( p, r, g, b ); 1348 return p; 1349 } 1350 case PF_8A8B8G8R: 1351 return PACK_8A8B8G8R( r, g, b, a ); 1352 case PF_8R8G8B: 1353 /* fall through */ 1354 case PF_8R8G8B24: 1355 return PACK_8R8G8B( r, g, b ); 1356 case PF_5R6G5B: 1357 return PACK_5R6G5B( r, g, b ); 1358 case PF_Dither: 1359 { 1360 DITHER_SETUP; 1361 return DITHER( 1, 0, r, g, b ); 1362 } 1363 case PF_1Bit: 1364 /* 382 = (3*255)/2 */ 1365 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1366 case PF_HPCR: 1367 return DITHER_HPCR(1, 1, r, g, b); 1368 case PF_Lookup: 1369 { 1370 LOOKUP_SETUP; 1371 return LOOKUP( r, g, b ); 1372 } 1373 case PF_Grayscale: 1374 return GRAY_RGB( r, g, b ); 1375 case PF_Dither_True: 1376 /* fall through */ 1377 case PF_Dither_5R6G5B: 1378 { 1379 unsigned long p; 1380 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1381 return p; 1382 } 1383 default: 1384 _mesa_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1385 } 1386 return 0; 1387} 1388 1389 1390#define NUM_VISUAL_TYPES 6 1391 1392/** 1393 * Convert an X visual type to a GLX visual type. 1394 * 1395 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1396 * to be converted. 1397 * \return If \c visualType is a valid X visual type, a GLX visual type will 1398 * be returned. Otherwise \c GLX_NONE will be returned. 1399 * 1400 * \note 1401 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1402 * DRI CVS tree. 1403 */ 1404static GLint 1405xmesa_convert_from_x_visual_type( int visualType ) 1406{ 1407 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1408 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1409 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1410 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1411 }; 1412 1413 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1414 ? glx_visual_types[ visualType ] : GLX_NONE; 1415} 1416 1417 1418/**********************************************************************/ 1419/***** Public Functions *****/ 1420/**********************************************************************/ 1421 1422 1423/* 1424 * Create a new X/Mesa visual. 1425 * Input: display - X11 display 1426 * visinfo - an XVisualInfo pointer 1427 * rgb_flag - GL_TRUE = RGB mode, 1428 * GL_FALSE = color index mode 1429 * alpha_flag - alpha buffer requested? 1430 * db_flag - GL_TRUE = double-buffered, 1431 * GL_FALSE = single buffered 1432 * stereo_flag - stereo visual? 1433 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1434 * GL_FALSE = use an off-screen pixmap for back buffer 1435 * depth_size - requested bits/depth values, or zero 1436 * stencil_size - requested bits/stencil values, or zero 1437 * accum_red_size - requested bits/red accum values, or zero 1438 * accum_green_size - requested bits/green accum values, or zero 1439 * accum_blue_size - requested bits/blue accum values, or zero 1440 * accum_alpha_size - requested bits/alpha accum values, or zero 1441 * num_samples - number of samples/pixel if multisampling, or zero 1442 * level - visual level, usually 0 1443 * visualCaveat - ala the GLX extension, usually GLX_NONE 1444 * Return; a new XMesaVisual or 0 if error. 1445 */ 1446XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1447 XMesaVisualInfo visinfo, 1448 GLboolean rgb_flag, 1449 GLboolean alpha_flag, 1450 GLboolean db_flag, 1451 GLboolean stereo_flag, 1452 GLboolean ximage_flag, 1453 GLint depth_size, 1454 GLint stencil_size, 1455 GLint accum_red_size, 1456 GLint accum_green_size, 1457 GLint accum_blue_size, 1458 GLint accum_alpha_size, 1459 GLint num_samples, 1460 GLint level, 1461 GLint visualCaveat ) 1462{ 1463 char *gamma; 1464 XMesaVisual v; 1465 GLint red_bits, green_bits, blue_bits, alpha_bits; 1466 1467 /* For debugging only */ 1468 if (_mesa_getenv("MESA_XSYNC")) { 1469 /* This makes debugging X easier. 1470 * In your debugger, set a breakpoint on _XError to stop when an 1471 * X protocol error is generated. 1472 */ 1473#ifdef XFree86Server 1474 /* NOT_NEEDED */ 1475#else 1476 XSynchronize( display, 1 ); 1477#endif 1478 } 1479 1480 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1481 if (!v) { 1482 return NULL; 1483 } 1484 1485 /* 1486 * In the X server, NULL is passed in for the display. It will have 1487 * to be set before using this visual. See XMesaSetVisualDisplay() 1488 * below. 1489 */ 1490 v->display = display; 1491 1492 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1493 * the struct but we may need some of the information contained in it 1494 * at a later time. 1495 */ 1496#ifndef XFree86Server 1497 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1498 if(!v->visinfo) { 1499 FREE(v); 1500 return NULL; 1501 } 1502 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1503#endif 1504 1505 /* check for MESA_GAMMA environment variable */ 1506 gamma = _mesa_getenv("MESA_GAMMA"); 1507 if (gamma) { 1508 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1509 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1510 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1511 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1512 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1513 } 1514 else { 1515 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1516 } 1517 1518 v->ximage_flag = ximage_flag; 1519 1520#ifdef XFree86Server 1521 /* We could calculate these values by ourselves. nplanes is either the sum 1522 * of the red, green, and blue bits or the number index bits. 1523 * ColormapEntries is either (1U << index_bits) or 1524 * (1U << max(redBits, greenBits, blueBits)). 1525 */ 1526 v->nplanes = visinfo->nplanes; 1527 v->ColormapEntries = visinfo->ColormapEntries; 1528 1529 v->mesa_visual.redMask = visinfo->redMask; 1530 v->mesa_visual.greenMask = visinfo->greenMask; 1531 v->mesa_visual.blueMask = visinfo->blueMask; 1532 v->mesa_visual.visualID = visinfo->vid; 1533 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1534#else 1535 v->mesa_visual.redMask = visinfo->red_mask; 1536 v->mesa_visual.greenMask = visinfo->green_mask; 1537 v->mesa_visual.blueMask = visinfo->blue_mask; 1538 v->mesa_visual.visualID = visinfo->visualid; 1539 v->mesa_visual.screen = visinfo->screen; 1540#endif 1541 1542#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1543 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1544#else 1545 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1546#endif 1547 1548 v->mesa_visual.visualRating = visualCaveat; 1549 1550 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1551 1552 { 1553 const int xclass = v->mesa_visual.visualType; 1554 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1555 red_bits = bitcount(GET_REDMASK(v)); 1556 green_bits = bitcount(GET_GREENMASK(v)); 1557 blue_bits = bitcount(GET_BLUEMASK(v)); 1558 alpha_bits = 0; 1559 } 1560 else { 1561 /* this is an approximation */ 1562 int depth; 1563 depth = GET_VISUAL_DEPTH(v); 1564 red_bits = depth / 3; 1565 depth -= red_bits; 1566 green_bits = depth / 2; 1567 depth -= green_bits; 1568 blue_bits = depth; 1569 alpha_bits = 0; 1570 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1571 } 1572 } 1573 1574 if (alpha_flag && alpha_bits == 0) 1575 alpha_bits = 8; 1576 1577 _mesa_initialize_visual( &v->mesa_visual, 1578 rgb_flag, db_flag, stereo_flag, 1579 red_bits, green_bits, 1580 blue_bits, alpha_bits, 1581 v->mesa_visual.indexBits, 1582 depth_size, 1583 stencil_size, 1584 accum_red_size, accum_green_size, 1585 accum_blue_size, accum_alpha_size, 1586 0 ); 1587 1588 /* XXX minor hack */ 1589 v->mesa_visual.level = level; 1590 return v; 1591} 1592 1593 1594void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1595{ 1596 v->display = dpy; 1597} 1598 1599 1600void XMesaDestroyVisual( XMesaVisual v ) 1601{ 1602#ifndef XFree86Server 1603 FREE(v->visinfo); 1604#endif 1605 FREE(v); 1606} 1607 1608 1609 1610/** 1611 * Create a new XMesaContext. 1612 * \param v the XMesaVisual 1613 * \param share_list another XMesaContext with which to share display 1614 * lists or NULL if no sharing is wanted. 1615 * \return an XMesaContext or NULL if error. 1616 */ 1617XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1618{ 1619 static GLboolean firstTime = GL_TRUE; 1620 XMesaContext c; 1621 GLcontext *mesaCtx; 1622 struct dd_function_table functions; 1623 TNLcontext *tnl; 1624 1625 if (firstTime) { 1626 _glthread_INIT_MUTEX(_xmesa_lock); 1627 firstTime = GL_FALSE; 1628 } 1629 1630 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1631 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1632 if (!c) 1633 return NULL; 1634 1635 mesaCtx = &(c->mesa); 1636 1637 /* initialize with default driver functions, then plug in XMesa funcs */ 1638 _mesa_init_driver_functions(&functions); 1639 xmesa_init_driver_functions(v, &functions); 1640 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1641 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1642 &functions, (void *) c)) { 1643 FREE(c); 1644 return NULL; 1645 } 1646 1647 _mesa_enable_sw_extensions(mesaCtx); 1648 _mesa_enable_1_3_extensions(mesaCtx); 1649 _mesa_enable_1_4_extensions(mesaCtx); 1650 _mesa_enable_1_5_extensions(mesaCtx); 1651 _mesa_enable_2_0_extensions(mesaCtx); 1652#if SWTC 1653 if (c->Mesa_DXTn) { 1654 _mesa_enable_extension(c, "GL_EXT_texture_compression_s3tc"); 1655 _mesa_enable_extension(c, "GL_S3_s3tc"); 1656 } 1657 _mesa_enable_extension(c, "GL_3DFX_texture_compression_FXT1"); 1658#endif 1659 1660 /* finish up xmesa context initializations */ 1661 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1662 c->xm_visual = v; 1663 c->xm_draw_buffer = NULL; /* set later by XMesaMakeCurrent */ 1664 c->xm_read_buffer = NULL; /* set later by XMesaMakeCurrent */ 1665 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1666 c->display = v->display; 1667 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1668 1669 /* Initialize the software rasterizer and helper modules. 1670 */ 1671 if (!_swrast_CreateContext( mesaCtx ) || 1672 !_ac_CreateContext( mesaCtx ) || 1673 !_tnl_CreateContext( mesaCtx ) || 1674 !_swsetup_CreateContext( mesaCtx )) { 1675 _mesa_free_context_data(&c->mesa); 1676 _mesa_free(c); 1677 return NULL; 1678 } 1679 1680 /* tnl setup */ 1681 tnl = TNL_CONTEXT(mesaCtx); 1682 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1683 /* swrast setup */ 1684 xmesa_register_swrast_functions( mesaCtx ); 1685 _swsetup_Wakeup(mesaCtx); 1686 1687 return c; 1688} 1689 1690 1691 1692void XMesaDestroyContext( XMesaContext c ) 1693{ 1694 GLcontext *mesaCtx = &c->mesa; 1695#ifdef FX 1696 if (c->xm_draw_buffer && c->xm_buffer->FXctx) 1697 fxMesaDestroyContext(c->xm_draw_buffer->FXctx); 1698#endif 1699 _swsetup_DestroyContext( mesaCtx ); 1700 _swrast_DestroyContext( mesaCtx ); 1701 _tnl_DestroyContext( mesaCtx ); 1702 _ac_DestroyContext( mesaCtx ); 1703 _mesa_free_context_data( mesaCtx ); 1704 _mesa_free( c ); 1705} 1706 1707 1708 1709/* 1710 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1711 * Create a new XMesaBuffer from an X window. 1712 * Input: v - the XMesaVisual 1713 * w - the window 1714 * c - the context 1715 * Return: new XMesaBuffer or NULL if error 1716 */ 1717XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1718 XMesaContext c ) 1719{ 1720#ifndef XFree86Server 1721 XWindowAttributes attr; 1722#endif 1723#ifdef FX 1724 char *fxEnvVar; 1725#endif 1726 int client = 0; 1727 1728 XMesaBuffer b = alloc_xmesa_buffer(); 1729 if (!b) { 1730 return NULL; 1731 } 1732 1733 (void) c; 1734 1735#ifdef XFree86Server 1736 client = CLIENT_ID(((XMesaDrawable)w)->id); 1737#endif 1738 1739 assert(v); 1740 1741#ifdef XFree86Server 1742 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1743 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1744 GET_VISUAL_DEPTH(v), ((XMesaDrawable) w)->depth); 1745 return NULL; 1746 } 1747#else 1748 XGetWindowAttributes( v->display, w, &attr ); 1749 1750 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1751 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1752 GET_VISUAL_DEPTH(v), attr.depth); 1753 return NULL; 1754 } 1755#endif 1756 1757 b->xm_visual = v; 1758 b->type = WINDOW; 1759 b->display = v->display; 1760#ifdef XFree86Server 1761 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1762#else 1763 if (attr.colormap) { 1764 b->cmap = attr.colormap; 1765 } 1766 else { 1767 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1768 /* this is weird, a window w/out a colormap!? */ 1769 /* OK, let's just allocate a new one and hope for the best */ 1770 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1771 } 1772#endif 1773 1774 /* determine back buffer implementation */ 1775 if (v->mesa_visual.doubleBufferMode) { 1776 if (v->ximage_flag) { 1777 b->db_state = BACK_XIMAGE; 1778 } 1779 else { 1780 b->db_state = BACK_PIXMAP; 1781 } 1782 } 1783 else { 1784 b->db_state = 0; 1785 } 1786 1787 _mesa_initialize_framebuffer(&b->mesa_buffer, 1788 &v->mesa_visual, 1789 v->mesa_visual.depthBits > 0, 1790 v->mesa_visual.stencilBits > 0, 1791 v->mesa_visual.accumRedBits > 0, 1792 v->mesa_visual.alphaBits > 0 ); 1793 /* XXX hack */ 1794 b->mesa_buffer.UseSoftwareAuxBuffers = GL_TRUE; 1795 1796 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1797 (XMesaDrawable)w, b->cmap )) { 1798 free_xmesa_buffer(client, b); 1799 return NULL; 1800 } 1801 1802#ifdef FX 1803 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1804 if (fxEnvVar) { 1805 if (fxEnvVar[0]!='d') { 1806 int attribs[100]; 1807 int numAttribs = 0; 1808 int hw; 1809 if (v->mesa_visual.depthBits > 0) { 1810 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1811 attribs[numAttribs++] = v->mesa_visual.depthBits; 1812 } 1813 if (v->mesa_visual.doubleBufferMode) { 1814 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1815 } 1816 if (v->mesa_visual.accumRedBits > 0) { 1817 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1818 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1819 } 1820 if (v->mesa_visual.stencilBits > 0) { 1821 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1822 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1823 } 1824 if (v->mesa_visual.alphaBits > 0) { 1825 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1826 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1827 } 1828 if (1) { 1829 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1830 attribs[numAttribs++] = (int) &(c->mesa); 1831 } 1832 attribs[numAttribs++] = FXMESA_NONE; 1833 1834 /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ 1835 hw = fxMesaSelectCurrentBoard(0); 1836 1837 /* if these fail, there's a new bug somewhere */ 1838 ASSERT(b->mesa_buffer.Width > 0); 1839 ASSERT(b->mesa_buffer.Height > 0); 1840 1841 if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) { 1842 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1843 b->mesa_buffer.Height, attribs); 1844 if ((v->undithered_pf!=PF_Index) && (b->backimage)) { 1845 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1846 if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) { 1847 b->FXwindowHack = GL_TRUE; 1848 FX_grSstControl(GR_CONTROL_DEACTIVATE); 1849 } 1850 else { 1851 b->FXwindowHack = GL_FALSE; 1852 } 1853 } 1854 } 1855 else { 1856 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1857 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1858 GR_REFRESH_75Hz, attribs); 1859 else 1860 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1861 b->mesa_buffer.Height, attribs); 1862 b->FXisHackUsable = GL_FALSE; 1863 b->FXwindowHack = GL_FALSE; 1864 } 1865 /* 1866 fprintf(stderr, 1867 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1868 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1869 */ 1870 } 1871 } 1872 else { 1873 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1874 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1875 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1876 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1877 } 1878#endif 1879 1880 return b; 1881} 1882 1883 1884XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1885{ 1886 return XMesaCreateWindowBuffer2( v, w, NULL ); 1887} 1888 1889 1890/** 1891 * Create a new XMesaBuffer from an X pixmap. 1892 * 1893 * \param v the XMesaVisual 1894 * \param p the pixmap 1895 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1896 * \c GLX_DIRECT_COLOR visual for the pixmap 1897 * \returns new XMesaBuffer or NULL if error 1898 */ 1899XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1900 XMesaPixmap p, XMesaColormap cmap ) 1901{ 1902 int client = 0; 1903 XMesaBuffer b = alloc_xmesa_buffer(); 1904 if (!b) { 1905 return NULL; 1906 } 1907 1908 1909#ifdef XFree86Server 1910 client = CLIENT_ID(((XMesaDrawable)p)->id); 1911#endif 1912 1913 assert(v); 1914 1915 b->xm_visual = v; 1916 b->type = PIXMAP; 1917 b->display = v->display; 1918 b->cmap = cmap; 1919 1920 /* determine back buffer implementation */ 1921 if (v->mesa_visual.doubleBufferMode) { 1922 if (v->ximage_flag) { 1923 b->db_state = BACK_XIMAGE; 1924 } 1925 else { 1926 b->db_state = BACK_PIXMAP; 1927 } 1928 } 1929 else { 1930 b->db_state = 0; 1931 } 1932 1933 _mesa_initialize_framebuffer(&b->mesa_buffer, 1934 &v->mesa_visual, 1935 v->mesa_visual.depthBits > 0, 1936 v->mesa_visual.stencilBits > 0, 1937 v->mesa_visual.accumRedBits + 1938 v->mesa_visual.accumGreenBits + 1939 v->mesa_visual.accumBlueBits > 0, 1940 v->mesa_visual.alphaBits > 0 ); 1941 1942 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1943 (XMesaDrawable)p, cmap)) { 1944 free_xmesa_buffer(client, b); 1945 return NULL; 1946 } 1947 1948 return b; 1949} 1950 1951 1952 1953XMesaBuffer XMesaCreatePBuffer( XMesaVisual v, XMesaColormap cmap, 1954 unsigned int width, unsigned int height ) 1955{ 1956#ifdef XFree86Server 1957 return 0; 1958#else 1959 int client = 0; 1960 XMesaWindow root; 1961 XMesaDrawable drawable; /* X Pixmap Drawable */ 1962 XMesaBuffer b = alloc_xmesa_buffer(); 1963 if (!b) { 1964 return NULL; 1965 } 1966 1967 b->xm_visual = v; 1968 b->type = PBUFFER; 1969 b->display = v->display; 1970 b->cmap = cmap; 1971 1972 /* allocate pixmap for front buffer */ 1973 root = RootWindow( v->display, v->visinfo->screen ); 1974 drawable = XCreatePixmap( v->display, root, width, height, v->visinfo->depth ); 1975 1976 /* determine back buffer implementation */ 1977 if (v->mesa_visual.doubleBufferMode) { 1978 if (v->ximage_flag) { 1979 b->db_state = BACK_XIMAGE; 1980 } 1981 else { 1982 b->db_state = BACK_PIXMAP; 1983 } 1984 } 1985 else { 1986 b->db_state = 0; 1987 } 1988 1989 _mesa_initialize_framebuffer(&b->mesa_buffer, 1990 &v->mesa_visual, 1991 v->mesa_visual.depthBits > 0, 1992 v->mesa_visual.stencilBits > 0, 1993 v->mesa_visual.accumRedBits + 1994 v->mesa_visual.accumGreenBits + 1995 v->mesa_visual.accumBlueBits > 0, 1996 v->mesa_visual.alphaBits > 0 ); 1997 1998 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1999 drawable, cmap)) { 2000 free_xmesa_buffer(client, b); 2001 return NULL; 2002 } 2003 2004 return b; 2005#endif 2006} 2007 2008 2009 2010/* 2011 * Deallocate an XMesaBuffer structure and all related info. 2012 */ 2013void XMesaDestroyBuffer( XMesaBuffer b ) 2014{ 2015 int client = 0; 2016 2017#ifdef XFree86Server 2018 if (b->frontbuffer) 2019 client = CLIENT_ID(b->frontbuffer->id); 2020#endif 2021 2022 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 2023 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 2024 if (b->swapgc) XMesaFreeGC( b->xm_visual->display, b->swapgc ); 2025 2026 if (b->backimage) { 2027#if defined(USE_XSHM) && !defined(XFree86Server) 2028 if (b->shm) { 2029 XShmDetach( b->xm_visual->display, &b->shminfo ); 2030 XDestroyImage( b->backimage ); 2031 shmdt( b->shminfo.shmaddr ); 2032 } 2033 else 2034#endif 2035 XMesaDestroyImage( b->backimage ); 2036 } 2037 if (b->backpixmap) { 2038 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 2039 if (b->xm_visual->hpcr_clear_flag) { 2040 XMesaFreePixmap( b->xm_visual->display, 2041 b->xm_visual->hpcr_clear_pixmap ); 2042 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 2043 } 2044 } 2045 if (b->rowimage) { 2046 FREE( b->rowimage->data ); 2047 b->rowimage->data = NULL; 2048 XMesaDestroyImage( b->rowimage ); 2049 } 2050 2051 free_xmesa_buffer(client, b); 2052} 2053 2054 2055 2056/* 2057 * Bind buffer b to context c and make c the current rendering context. 2058 */ 2059GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2060{ 2061 return XMesaMakeCurrent2( c, b, b ); 2062} 2063 2064 2065/* 2066 * Bind buffer b to context c and make c the current rendering context. 2067 */ 2068GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2069 XMesaBuffer readBuffer ) 2070{ 2071 if (c) { 2072 if (!drawBuffer || !readBuffer) 2073 return GL_FALSE; /* must specify buffers! */ 2074 2075#ifdef FX 2076 if (drawBuffer->FXctx) { 2077 fxMesaMakeCurrent(drawBuffer->FXctx); 2078 2079 c->xm_draw_buffer = drawBuffer; 2080 c->xm_read_buffer = readBuffer; 2081 c->xm_buffer = drawBuffer; 2082 2083 return GL_TRUE; 2084 } 2085#endif 2086 if (&(c->mesa) == _mesa_get_current_context() 2087 && c->xm_draw_buffer == drawBuffer 2088 && c->xm_read_buffer == readBuffer 2089 && c->xm_draw_buffer->wasCurrent) { 2090 /* same context and buffer, do nothing */ 2091 return GL_TRUE; 2092 } 2093 2094 c->xm_draw_buffer = drawBuffer; 2095 c->xm_read_buffer = readBuffer; 2096 c->xm_buffer = drawBuffer; 2097 2098 _mesa_make_current2(&(c->mesa), 2099 &drawBuffer->mesa_buffer, 2100 &readBuffer->mesa_buffer); 2101 2102 if (c->xm_visual->mesa_visual.rgbMode) { 2103 /* 2104 * Must recompute and set these pixel values because colormap 2105 * can be different for different windows. 2106 */ 2107 c->clearpixel = xmesa_color_to_pixel( c, 2108 c->clearcolor[0], 2109 c->clearcolor[1], 2110 c->clearcolor[2], 2111 c->clearcolor[3], 2112 c->xm_visual->undithered_pf); 2113 XMesaSetForeground(c->display, c->xm_draw_buffer->cleargc, c->clearpixel); 2114 } 2115 2116 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2117 c->xm_draw_buffer->wasCurrent = GL_TRUE; 2118 } 2119 else { 2120 /* Detach */ 2121 _mesa_make_current2( NULL, NULL, NULL ); 2122 } 2123 return GL_TRUE; 2124} 2125 2126 2127/* 2128 * Unbind the context c from its buffer. 2129 */ 2130GLboolean XMesaUnbindContext( XMesaContext c ) 2131{ 2132 /* A no-op for XFree86 integration purposes */ 2133 return GL_TRUE; 2134} 2135 2136 2137XMesaContext XMesaGetCurrentContext( void ) 2138{ 2139 GET_CURRENT_CONTEXT(ctx); 2140 if (ctx) { 2141 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2142 return xmesa; 2143 } 2144 else { 2145 return 0; 2146 } 2147} 2148 2149 2150XMesaBuffer XMesaGetCurrentBuffer( void ) 2151{ 2152 GET_CURRENT_CONTEXT(ctx); 2153 if (ctx) { 2154 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2155 return xmesa->xm_draw_buffer; 2156 } 2157 else { 2158 return 0; 2159 } 2160} 2161 2162 2163/* New in Mesa 3.1 */ 2164XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2165{ 2166 GET_CURRENT_CONTEXT(ctx); 2167 if (ctx) { 2168 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2169 return xmesa->xm_read_buffer; 2170 } 2171 else { 2172 return 0; 2173 } 2174} 2175 2176 2177GLboolean XMesaForceCurrent(XMesaContext c) 2178{ 2179 if (c) { 2180 if (&(c->mesa) != _mesa_get_current_context()) { 2181 _mesa_make_current(&(c->mesa), &c->xm_draw_buffer->mesa_buffer); 2182 } 2183 } 2184 else { 2185 _mesa_make_current(NULL, NULL); 2186 } 2187 return GL_TRUE; 2188} 2189 2190 2191GLboolean XMesaLoseCurrent(XMesaContext c) 2192{ 2193 (void) c; 2194 _mesa_make_current(NULL, NULL); 2195 return GL_TRUE; 2196} 2197 2198 2199/* 2200 * Switch 3Dfx support hack between window and full-screen mode. 2201 */ 2202GLboolean XMesaSetFXmode( GLint mode ) 2203{ 2204#ifdef FX 2205 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2206 if (fx && fx[0] != 'd') { 2207 GET_CURRENT_CONTEXT(ctx); 2208 GrHwConfiguration hw; 2209 if (!FX_grSstQueryHardware(&hw)) { 2210 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2211 return GL_FALSE; 2212 } 2213 if (hw.num_sst < 1) { 2214 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2215 return GL_FALSE; 2216 } 2217 if (ctx) { 2218 /* [dBorca] Hack alert: 2219 * oh, this is sooo wrong: ctx above is 2220 * really an fxMesaContext, not an XMesaContext 2221 */ 2222 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2223 if (mode == XMESA_FX_WINDOW) { 2224 if (xmesa->xm_draw_buffer->FXisHackUsable) { 2225 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2226 xmesa->xm_draw_buffer->FXwindowHack = GL_TRUE; 2227 return GL_TRUE; 2228 } 2229 } 2230 else if (mode == XMESA_FX_FULLSCREEN) { 2231 FX_grSstControl(GR_CONTROL_ACTIVATE); 2232 xmesa->xm_draw_buffer->FXwindowHack = GL_FALSE; 2233 return GL_TRUE; 2234 } 2235 else { 2236 /* Error: Bad mode value */ 2237 } 2238 } 2239 } 2240 /*fprintf(stderr, "fallthrough\n");*/ 2241#else 2242 (void) mode; 2243#endif 2244 return GL_FALSE; 2245} 2246 2247 2248 2249#ifdef FX 2250/* 2251 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2252 */ 2253static void FXgetImage( XMesaBuffer b ) 2254{ 2255 GET_CURRENT_CONTEXT(ctx); 2256 static unsigned short pixbuf[MAX_WIDTH]; 2257 GLuint x, y; 2258 int xpos, ypos; 2259 XMesaWindow root; 2260 unsigned int bw, depth, width, height; 2261 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2262 2263#ifdef XFree86Server 2264 x = b->frontbuffer->x; 2265 y = b->frontbuffer->y; 2266 width = b->frontbuffer->width; 2267 height = b->frontbuffer->height; 2268 depth = b->frontbuffer->depth; 2269#else 2270 XGetGeometry( b->xm_visual->display, b->frontbuffer, 2271 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2272#endif 2273 if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) { 2274 b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width); 2275 b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height); 2276 if (b->mesa_buffer.Width & 1) 2277 b->mesa_buffer.Width--; /* prevent odd width */ 2278 xmesa_alloc_back_buffer( b ); 2279 } 2280 2281 /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */ 2282 /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */ 2283 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2284 /* Special case: 16bpp RGB */ 2285 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2286 0, b->FXctx->height - b->mesa_buffer.Height, /*pos*/ 2287 b->mesa_buffer.Width, b->mesa_buffer.Height, /* size */ 2288 b->mesa_buffer.Width * sizeof(GLushort), /* stride */ 2289 b->backimage->data); /* dest buffer */ 2290 } 2291 else if (b->xm_visual->dithered_pf==PF_Dither 2292 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2293 /* Special case: 8bpp RGB */ 2294 for (y=0;y<b->mesa_buffer.Height;y++) { 2295 GLubyte *ptr = (GLubyte*) b->backimage->data 2296 + b->backimage->bytes_per_line * y; 2297 XDITHER_SETUP(y); 2298 2299 /* read row from 3Dfx frame buffer */ 2300 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2301 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2302 b->mesa_buffer.Width, 1, 2303 0, 2304 pixbuf ); 2305 2306 /* write to XImage back buffer */ 2307 for (x=0;x<b->mesa_buffer.Width;x++) { 2308 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2309 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2310 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2311 *ptr++ = XDITHER( x, r, g, b); 2312 } 2313 } 2314 } 2315 else { 2316 /* General case: slow! */ 2317 for (y=0;y<b->mesa_buffer.Height;y++) { 2318 /* read row from 3Dfx frame buffer */ 2319 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2320 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2321 b->mesa_buffer.Width, 1, 2322 0, 2323 pixbuf ); 2324 2325 /* write to XImage back buffer */ 2326 for (x=0;x<b->mesa_buffer.Width;x++) { 2327 XMesaPutPixel(b->backimage,x,y, 2328 xmesa_color_to_pixel(xmesa, 2329 (pixbuf[x] & 0xf800) >> 8, 2330 (pixbuf[x] & 0x07e0) >> 3, 2331 (pixbuf[x] & 0x001f) << 3, 2332 0xff, 2333 b->xm_visual->undithered_pf)); 2334 } 2335 } 2336 } 2337 /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */ 2338} 2339#endif 2340 2341 2342/* 2343 * Copy the back buffer to the front buffer. If there's no back buffer 2344 * this is a no-op. 2345 */ 2346void XMesaSwapBuffers( XMesaBuffer b ) 2347{ 2348 GET_CURRENT_CONTEXT(ctx); 2349 2350 /* If we're swapping the buffer associated with the current context 2351 * we have to flush any pending rendering commands first. 2352 */ 2353 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2354 _mesa_notifySwapBuffers(ctx); 2355 2356 if (b->db_state) { 2357#ifdef FX 2358 if (b->FXctx) { 2359 fxMesaSwapBuffers(); 2360 2361 if (b->FXwindowHack) 2362 FXgetImage(b); 2363 else 2364 return; 2365 } 2366#endif 2367 if (b->backimage) { 2368 /* Copy Ximage from host's memory to server's window */ 2369#if defined(USE_XSHM) && !defined(XFree86Server) 2370 if (b->shm) { 2371 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2372 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2373 b->swapgc, 2374 b->backimage, 0, 0, 2375 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2376 False ); 2377 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2378 } 2379 else 2380#endif 2381 { 2382 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2383 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2384 b->swapgc, 2385 b->backimage, 0, 0, 2386 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2387 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2388 } 2389 } 2390 else { 2391 /* Copy pixmap to window on server */ 2392 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2393 XMesaCopyArea( b->xm_visual->display, 2394 b->backpixmap, /* source drawable */ 2395 b->frontbuffer, /* dest. drawable */ 2396 b->swapgc, 2397 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2398 0, 0 /* dest region */ 2399 ); 2400 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2401 } 2402 } 2403#if !defined(XFree86Server) 2404 XSync( b->xm_visual->display, False ); 2405#endif 2406} 2407 2408 2409 2410/* 2411 * Copy sub-region of back buffer to front buffer 2412 */ 2413void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2414{ 2415 GET_CURRENT_CONTEXT(ctx); 2416 2417 /* If we're swapping the buffer associated with the current context 2418 * we have to flush any pending rendering commands first. 2419 */ 2420 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2421 _mesa_notifySwapBuffers(ctx); 2422 2423 if (b->db_state) { 2424 int yTop = b->mesa_buffer.Height - y - height; 2425#ifdef FX 2426 if (b->FXctx) { 2427 fxMesaSwapBuffers(); 2428 if (b->FXwindowHack) 2429 FXgetImage(b); 2430 else 2431 return; 2432 } 2433#endif 2434 if (b->backimage) { 2435 /* Copy Ximage from host's memory to server's window */ 2436#if defined(USE_XSHM) && !defined(XFree86Server) 2437 if (b->shm) { 2438 /* XXX assuming width and height aren't too large! */ 2439 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2440 b->swapgc, 2441 b->backimage, x, yTop, 2442 x, yTop, width, height, False ); 2443 /* wait for finished event??? */ 2444 } 2445 else 2446#endif 2447 { 2448 /* XXX assuming width and height aren't too large! */ 2449 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2450 b->swapgc, 2451 b->backimage, x, yTop, 2452 x, yTop, width, height ); 2453 } 2454 } 2455 else { 2456 /* Copy pixmap to window on server */ 2457 XMesaCopyArea( b->xm_visual->display, 2458 b->backpixmap, /* source drawable */ 2459 b->frontbuffer, /* dest. drawable */ 2460 b->swapgc, 2461 x, yTop, width, height, /* source region */ 2462 x, yTop /* dest region */ 2463 ); 2464 } 2465 } 2466} 2467 2468 2469/* 2470 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2471 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2472 * back buffer directly. 2473 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2474 * ximage - pointer to back buffer's XImage, or NULL 2475 * Return: GL_TRUE = context is double buffered 2476 * GL_FALSE = context is single buffered 2477 */ 2478GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2479 XMesaPixmap *pixmap, 2480 XMesaImage **ximage ) 2481{ 2482 if (b->db_state) { 2483 if (pixmap) *pixmap = b->backpixmap; 2484 if (ximage) *ximage = b->backimage; 2485 return GL_TRUE; 2486 } 2487 else { 2488 *pixmap = 0; 2489 *ximage = NULL; 2490 return GL_FALSE; 2491 } 2492} 2493 2494 2495/* 2496 * Return the depth buffer associated with an XMesaBuffer. 2497 * Input: b - the XMesa buffer handle 2498 * Output: width, height - size of buffer in pixels 2499 * bytesPerValue - bytes per depth value (2 or 4) 2500 * buffer - pointer to depth buffer values 2501 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2502 */ 2503GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2504 GLint *bytesPerValue, void **buffer ) 2505{ 2506 if (!b->mesa_buffer.DepthBuffer) { 2507 *width = 0; 2508 *height = 0; 2509 *bytesPerValue = 0; 2510 *buffer = 0; 2511 return GL_FALSE; 2512 } 2513 else { 2514 *width = b->mesa_buffer.Width; 2515 *height = b->mesa_buffer.Height; 2516 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2517 ? sizeof(GLushort) : sizeof(GLuint); 2518 *buffer = b->mesa_buffer.DepthBuffer; 2519 return GL_TRUE; 2520 } 2521} 2522 2523 2524void XMesaFlush( XMesaContext c ) 2525{ 2526 if (c && c->xm_visual) { 2527#ifdef XFree86Server 2528 /* NOT_NEEDED */ 2529#else 2530 XSync( c->xm_visual->display, False ); 2531#endif 2532 } 2533} 2534 2535 2536 2537const char *XMesaGetString( XMesaContext c, int name ) 2538{ 2539 (void) c; 2540 if (name==XMESA_VERSION) { 2541 return "5.0"; 2542 } 2543 else if (name==XMESA_EXTENSIONS) { 2544 return ""; 2545 } 2546 else { 2547 return NULL; 2548 } 2549} 2550 2551 2552 2553XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2554{ 2555 XMesaBuffer b; 2556 for (b=XMesaBufferList; b; b=b->Next) { 2557 if (b->frontbuffer==d && b->display==dpy) { 2558 return b; 2559 } 2560 } 2561 return NULL; 2562} 2563 2564 2565 2566/* 2567 * Look for XMesaBuffers whose X window has been destroyed. 2568 * Deallocate any such XMesaBuffers. 2569 */ 2570void XMesaGarbageCollect( void ) 2571{ 2572 XMesaBuffer b, next; 2573 for (b=XMesaBufferList; b; b=next) { 2574 next = b->Next; 2575 if (b->display && b->frontbuffer && b->type == WINDOW) { 2576#ifdef XFree86Server 2577 /* NOT_NEEDED */ 2578#else 2579 XSync(b->display, False); 2580 if (!window_exists( b->display, b->frontbuffer )) { 2581 /* found a dead window, free the ancillary info */ 2582 XMesaDestroyBuffer( b ); 2583 } 2584#endif 2585 } 2586 } 2587} 2588 2589 2590void XMesaReset( void ) 2591{ 2592 while (XMesaBufferList) 2593 XMesaDestroyBuffer(XMesaBufferList); 2594 2595 XMesaBufferList = NULL; 2596} 2597 2598 2599unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2600 GLfloat red, GLfloat green, 2601 GLfloat blue, GLfloat alpha ) 2602{ 2603 GLint r = (GLint) (red * 255.0F); 2604 GLint g = (GLint) (green * 255.0F); 2605 GLint b = (GLint) (blue * 255.0F); 2606 GLint a = (GLint) (alpha * 255.0F); 2607 2608 switch (xmesa->pixelformat) { 2609 case PF_Index: 2610 return 0; 2611 case PF_Truecolor: 2612 { 2613 unsigned long p; 2614 PACK_TRUECOLOR( p, r, g, b ); 2615 return p; 2616 } 2617 case PF_8A8B8G8R: 2618 return PACK_8A8B8G8R( r, g, b, a ); 2619 case PF_8R8G8B: 2620 return PACK_8R8G8B( r, g, b ); 2621 case PF_5R6G5B: 2622 return PACK_5R6G5B( r, g, b ); 2623 case PF_Dither: 2624 { 2625 DITHER_SETUP; 2626 return DITHER( x, y, r, g, b ); 2627 } 2628 case PF_1Bit: 2629 /* 382 = (3*255)/2 */ 2630 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2631 case PF_HPCR: 2632 return DITHER_HPCR(x, y, r, g, b); 2633 case PF_Lookup: 2634 { 2635 LOOKUP_SETUP; 2636 return LOOKUP( r, g, b ); 2637 } 2638 case PF_Grayscale: 2639 return GRAY_RGB( r, g, b ); 2640 case PF_Dither_5R6G5B: 2641 /* fall through */ 2642 case PF_Dither_True: 2643 { 2644 unsigned long p; 2645 PACK_TRUEDITHER(p, x, y, r, g, b); 2646 return p; 2647 } 2648 default: 2649 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2650 } 2651 return 0; 2652} 2653 2654 2655/* 2656 * This is typically called when the window size changes and we need 2657 * to reallocate the buffer's back/depth/stencil/accum buffers. 2658 */ 2659void XMesaResizeBuffers( XMesaBuffer b ) 2660{ 2661 xmesa_resize_buffers( &(b->mesa_buffer) ); 2662 2663} 2664 2665