xm_api.c revision 53f82c5aadbb15585754bfacf3237093eccdb2ce
1/* 2 * Mesa 3-D graphics library 3 * Version: 6.3 4 * 5 * Copyright (C) 1999-2004 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 * Return the width and height of the given drawable. 225 */ 226static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 227 unsigned int *width, unsigned int *height) 228{ 229#ifdef XFree86Server 230 (void) dpy; 231 *width = d->width; 232 *height = d->height; 233#else 234 Window root; 235 int x, y; 236 unsigned int bw, depth; 237 238 _glthread_LOCK_MUTEX(_xmesa_lock); 239 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 240 _glthread_UNLOCK_MUTEX(_xmesa_lock); 241#endif 242} 243 244 245/* 246 * Apply gamma correction to an intensity value in [0..max]. Return the 247 * new intensity value. 248 */ 249static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 250{ 251 if (gamma == 1.0) { 252 return value; 253 } 254 else { 255 double x = (double) value / (double) max; 256 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 257 } 258} 259 260 261 262/* 263 * Return the true number of bits per pixel for XImages. 264 * For example, if we request a 24-bit deep visual we may actually need/get 265 * 32bpp XImages. This function returns the appropriate bpp. 266 * Input: dpy - the X display 267 * visinfo - desribes the visual to be used for XImages 268 * Return: true number of bits per pixel for XImages 269 */ 270#ifdef XFree86Server 271 272static int bits_per_pixel( XMesaVisual xmv ) 273{ 274 const int depth = xmv->nplanes; 275 int i; 276 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 277 if (screenInfo.formats[i].depth == depth) 278 return screenInfo.formats[i].bitsPerPixel; 279 } 280 return depth; /* should never get here, but this should be safe */ 281} 282 283#else 284 285static int bits_per_pixel( XMesaVisual xmv ) 286{ 287 XMesaDisplay *dpy = xmv->display; 288 XMesaVisualInfo visinfo = xmv->visinfo; 289 XMesaImage *img; 290 int bitsPerPixel; 291 /* Create a temporary XImage */ 292 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 293 ZPixmap, 0, /*format, offset*/ 294 (char*) MALLOC(8), /*data*/ 295 1, 1, /*width, height*/ 296 32, /*bitmap_pad*/ 297 0 /*bytes_per_line*/ 298 ); 299 assert(img); 300 /* grab the bits/pixel value */ 301 bitsPerPixel = img->bits_per_pixel; 302 /* free the XImage */ 303 FREE( img->data ); 304 img->data = NULL; 305 XMesaDestroyImage( img ); 306 return bitsPerPixel; 307} 308#endif 309 310 311 312/* 313 * Determine if a given X window ID is valid (window exists). 314 * Do this by calling XGetWindowAttributes() for the window and 315 * checking if we catch an X error. 316 * Input: dpy - the display 317 * win - the window to check for existance 318 * Return: GL_TRUE - window exists 319 * GL_FALSE - window doesn't exist 320 */ 321#ifndef XFree86Server 322static GLboolean WindowExistsFlag; 323 324static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 325{ 326 (void) dpy; 327 if (xerr->error_code == BadWindow) { 328 WindowExistsFlag = GL_FALSE; 329 } 330 return 0; 331} 332 333static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 334{ 335 XWindowAttributes wa; 336 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 337 WindowExistsFlag = GL_TRUE; 338 old_handler = XSetErrorHandler(window_exists_err_handler); 339 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 340 XSetErrorHandler(old_handler); 341 return WindowExistsFlag; 342} 343#endif 344 345 346 347/**********************************************************************/ 348/***** Linked list of XMesaBuffers *****/ 349/**********************************************************************/ 350 351static XMesaBuffer XMesaBufferList = NULL; 352 353 354/* Allocate a new XMesaBuffer, add to linked list */ 355static XMesaBuffer alloc_xmesa_buffer(void) 356{ 357 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 358 if (b) { 359 b->Next = XMesaBufferList; 360 XMesaBufferList = b; 361 } 362 return b; 363} 364 365 366/* 367 * Find an XMesaBuffer by matching X display and colormap but NOT matching 368 * the notThis buffer. 369 */ 370static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 371 XMesaColormap cmap, 372 XMesaBuffer notThis) 373{ 374 XMesaBuffer b; 375 for (b=XMesaBufferList; b; b=b->Next) { 376 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 377 return b; 378 } 379 } 380 return NULL; 381} 382 383 384/* 385 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 386 * entries. 387 */ 388static void free_xmesa_buffer(int client, XMesaBuffer buffer) 389{ 390 XMesaBuffer prev = NULL, b; 391 (void) client; 392 for (b=XMesaBufferList; b; b=b->Next) { 393 if (b==buffer) { 394 /* unlink bufer from list */ 395 if (prev) 396 prev->Next = buffer->Next; 397 else 398 XMesaBufferList = buffer->Next; 399 /* Check to free X colors */ 400 if (buffer->num_alloced>0) { 401 /* If no other buffer uses this X colormap then free the colors. */ 402 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 403#ifdef XFree86Server 404 (void)FreeColors(buffer->cmap, client, 405 buffer->num_alloced, buffer->alloced_colors, 406 0); 407#else 408 XFreeColors(buffer->display, buffer->cmap, 409 buffer->alloced_colors, buffer->num_alloced, 0); 410#endif 411 } 412 } 413 414 _mesa_free_framebuffer_data(&buffer->mesa_buffer); 415 FREE(buffer); 416 417 return; 418 } 419 /* continue search */ 420 prev = b; 421 } 422 /* buffer not found in XMesaBufferList */ 423 _mesa_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 424} 425 426 427/* Copy X color table stuff from one XMesaBuffer to another. */ 428static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 429{ 430 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 431 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 432 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 433 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 434 dst->num_alloced = src->num_alloced; 435 MEMCPY(dst->alloced_colors, src->alloced_colors, 436 sizeof(src->alloced_colors)); 437} 438 439 440 441/**********************************************************************/ 442/***** Misc Private Functions *****/ 443/**********************************************************************/ 444 445 446/* 447 * Return number of bits set in n. 448 */ 449static int bitcount( unsigned long n ) 450{ 451 int bits; 452 for (bits=0; n>0; n=n>>1) { 453 if (n&1) { 454 bits++; 455 } 456 } 457 return bits; 458} 459 460 461 462/* 463 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 464 * Return: GL_TRUE if success, GL_FALSE if error 465 */ 466#ifndef XFree86Server 467static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 468{ 469#ifdef USE_XSHM 470 /* 471 * We have to do a _lot_ of error checking here to be sure we can 472 * really use the XSHM extension. It seems different servers trigger 473 * errors at different points if the extension won't work. Therefore 474 * we have to be very careful... 475 */ 476 GC gc; 477 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 478 479 b->backimage = XShmCreateImage( b->xm_visual->display, 480 b->xm_visual->visinfo->visual, 481 b->xm_visual->visinfo->depth, 482 ZPixmap, NULL, &b->shminfo, 483 b->width, b->height ); 484 if (b->backimage == NULL) { 485 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 486 b->shm = 0; 487 return GL_FALSE; 488 } 489 490 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 491 * b->backimage->height, IPC_CREAT|0777 ); 492 if (b->shminfo.shmid < 0) { 493 _mesa_warning(NULL, "shmget failed while allocating back buffer"); 494 XDestroyImage( b->backimage ); 495 b->backimage = NULL; 496 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmget), disabling."); 497 b->shm = 0; 498 return GL_FALSE; 499 } 500 501 b->shminfo.shmaddr = b->backimage->data 502 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 503 if (b->shminfo.shmaddr == (char *) -1) { 504 _mesa_warning(NULL, "shmat() failed while allocating back buffer"); 505 XDestroyImage( b->backimage ); 506 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 507 b->backimage = NULL; 508 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmat), disabling."); 509 b->shm = 0; 510 return GL_FALSE; 511 } 512 513 b->shminfo.readOnly = False; 514 mesaXErrorFlag = 0; 515 old_handler = XSetErrorHandler( mesaHandleXError ); 516 /* This may trigger the X protocol error we're ready to catch: */ 517 XShmAttach( b->xm_visual->display, &b->shminfo ); 518 XSync( b->xm_visual->display, False ); 519 520 if (mesaXErrorFlag) { 521 /* we are on a remote display, this error is normal, don't print it */ 522 XFlush( b->xm_visual->display ); 523 mesaXErrorFlag = 0; 524 XDestroyImage( b->backimage ); 525 shmdt( b->shminfo.shmaddr ); 526 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 527 b->backimage = NULL; 528 b->shm = 0; 529 (void) XSetErrorHandler( old_handler ); 530 return GL_FALSE; 531 } 532 533 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 534 535 /* Finally, try an XShmPutImage to be really sure the extension works */ 536 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 537 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 538 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 539 XSync( b->xm_visual->display, False ); 540 XFreeGC( b->xm_visual->display, gc ); 541 (void) XSetErrorHandler( old_handler ); 542 if (mesaXErrorFlag) { 543 XFlush( b->xm_visual->display ); 544 mesaXErrorFlag = 0; 545 XDestroyImage( b->backimage ); 546 shmdt( b->shminfo.shmaddr ); 547 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 548 b->backimage = NULL; 549 b->shm = 0; 550 return GL_FALSE; 551 } 552 553 if (b->backimage) { 554 int height = b->backimage->height; 555 /* Needed by PIXELADDR1 macro */ 556 b->ximage_width1 = b->backimage->bytes_per_line; 557 b->ximage_origin1 = (GLubyte *) b->backimage->data 558 + b->ximage_width1 * (height-1); 559 /* Needed by PIXELADDR2 macro */ 560 b->ximage_width2 = b->backimage->bytes_per_line / 2; 561 b->ximage_origin2 = (GLushort *) b->backimage->data 562 + b->ximage_width2 * (height-1); 563 /* Needed by PIXELADDR3 macro */ 564 b->ximage_width3 = b->backimage->bytes_per_line; 565 b->ximage_origin3 = (GLubyte *) b->backimage->data 566 + b->ximage_width3 * (height-1); 567 /* Needed by PIXELADDR4 macro */ 568 b->ximage_width4 = b->backimage->width; 569 b->ximage_origin4 = (GLuint *) b->backimage->data 570 + b->ximage_width4 * (height-1); 571 } 572 573 return GL_TRUE; 574#else 575 /* Can't compile XSHM support */ 576 return GL_FALSE; 577#endif 578} 579#endif 580 581 582 583/* 584 * Setup an off-screen pixmap or Ximage to use as the back buffer. 585 * Input: b - the X/Mesa buffer 586 */ 587void xmesa_alloc_back_buffer( XMesaBuffer b ) 588{ 589 if (b->db_state==BACK_XIMAGE) { 590 /* Deallocate the old backimage, if any */ 591 if (b->backimage) { 592#if defined(USE_XSHM) && !defined(XFree86Server) 593 if (b->shm) { 594 XShmDetach( b->xm_visual->display, &b->shminfo ); 595 XDestroyImage( b->backimage ); 596 shmdt( b->shminfo.shmaddr ); 597 } 598 else 599#endif 600 XMesaDestroyImage( b->backimage ); 601 b->backimage = NULL; 602 } 603 604 /* Allocate new back buffer */ 605#ifdef XFree86Server 606 { 607 /* Allocate a regular XImage for the back buffer. */ 608 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 609 b->width, b->height, NULL); 610#else 611 if (b->shm==0 || alloc_shm_back_buffer(b)==GL_FALSE) { 612 /* Allocate a regular XImage for the back buffer. */ 613 b->backimage = XCreateImage( b->xm_visual->display, 614 b->xm_visual->visinfo->visual, 615 GET_VISUAL_DEPTH(b->xm_visual), 616 ZPixmap, 0, /* format, offset */ 617 NULL, b->width, b->height, 618 8, 0 ); /* pad, bytes_per_line */ 619#endif 620 if (!b->backimage) { 621 _mesa_warning(NULL, "alloc_back_buffer: XCreateImage failed."); 622 } 623 b->backimage->data = (char *) MALLOC( b->backimage->height 624 * b->backimage->bytes_per_line ); 625 if (!b->backimage->data) { 626 _mesa_warning(NULL, "alloc_back_buffer: MALLOC failed."); 627 XMesaDestroyImage( b->backimage ); 628 b->backimage = NULL; 629 } 630 } 631 b->backpixmap = None; 632 } 633 else if (b->db_state==BACK_PIXMAP) { 634 XMesaPixmap old_pixmap = b->backpixmap; 635 /* Free the old back pixmap */ 636 if (b->backpixmap) { 637 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 638 } 639 /* Allocate new back pixmap */ 640 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 641 b->width, b->height, 642 GET_VISUAL_DEPTH(b->xm_visual) ); 643 b->backimage = NULL; 644 /* update other references to backpixmap */ 645 if (b->buffer==(XMesaDrawable)old_pixmap) { 646 b->buffer = (XMesaDrawable)b->backpixmap; 647 } 648 } 649} 650 651 652 653/* 654 * A replacement for XAllocColor. This function should never 655 * fail to allocate a color. When XAllocColor fails, we return 656 * the nearest matching color. If we have to allocate many colors 657 * this function isn't too efficient; the XQueryColors() could be 658 * done just once. 659 * Written by Michael Pichler, Brian Paul, Mark Kilgard 660 * Input: dpy - X display 661 * cmap - X colormap 662 * cmapSize - size of colormap 663 * In/Out: color - the XColor struct 664 * Output: exact - 1=exact color match, 0=closest match 665 * alloced - 1=XAlloc worked, 0=XAlloc failed 666 */ 667static void 668noFaultXAllocColor( int client, 669 XMesaDisplay *dpy, 670 XMesaColormap cmap, 671 int cmapSize, 672 XMesaColor *color, 673 int *exact, int *alloced ) 674{ 675#ifdef XFree86Server 676 Pixel *ppixIn; 677 xrgb *ctable; 678#else 679 /* we'll try to cache ctable for better remote display performance */ 680 static Display *prevDisplay = NULL; 681 static XMesaColormap prevCmap = 0; 682 static int prevCmapSize = 0; 683 static XMesaColor *ctable = NULL; 684#endif 685 XMesaColor subColor; 686 int i, bestmatch; 687 double mindist; /* 3*2^16^2 exceeds long int precision. */ 688 689 (void) client; 690 691 /* First try just using XAllocColor. */ 692#ifdef XFree86Server 693 if (AllocColor(cmap, 694 &color->red, &color->green, &color->blue, 695 &color->pixel, 696 client) == Success) { 697#else 698 if (XAllocColor(dpy, cmap, color)) { 699#endif 700 *exact = 1; 701 *alloced = 1; 702 return; 703 } 704 705 /* Alloc failed, search for closest match */ 706 707 /* Retrieve color table entries. */ 708 /* XXX alloca candidate. */ 709#ifdef XFree86Server 710 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 711 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 712 for (i = 0; i < cmapSize; i++) { 713 ppixIn[i] = i; 714 } 715 QueryColors(cmap, cmapSize, ppixIn, ctable); 716#else 717 if (prevDisplay != dpy || prevCmap != cmap 718 || prevCmapSize != cmapSize || !ctable) { 719 /* free previously cached color table */ 720 if (ctable) 721 FREE(ctable); 722 /* Get the color table from X */ 723 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 724 assert(ctable); 725 for (i = 0; i < cmapSize; i++) { 726 ctable[i].pixel = i; 727 } 728 XQueryColors(dpy, cmap, ctable, cmapSize); 729 prevDisplay = dpy; 730 prevCmap = cmap; 731 prevCmapSize = cmapSize; 732 } 733#endif 734 735 /* Find best match. */ 736 bestmatch = -1; 737 mindist = 0.0; 738 for (i = 0; i < cmapSize; i++) { 739 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 740 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 741 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 742 double dist = dr * dr + dg * dg + db * db; 743 if (bestmatch < 0 || dist < mindist) { 744 bestmatch = i; 745 mindist = dist; 746 } 747 } 748 749 /* Return result. */ 750 subColor.red = ctable[bestmatch].red; 751 subColor.green = ctable[bestmatch].green; 752 subColor.blue = ctable[bestmatch].blue; 753 /* Try to allocate the closest match color. This should only 754 * fail if the cell is read/write. Otherwise, we're incrementing 755 * the cell's reference count. 756 */ 757#ifdef XFree86Server 758 if (AllocColor(cmap, 759 &subColor.red, &subColor.green, &subColor.blue, 760 &subColor.pixel, 761 client) == Success) { 762#else 763 if (XAllocColor(dpy, cmap, &subColor)) { 764#endif 765 *alloced = 1; 766 } 767 else { 768 /* do this to work around a problem reported by Frank Ortega */ 769 subColor.pixel = (unsigned long) bestmatch; 770 subColor.red = ctable[bestmatch].red; 771 subColor.green = ctable[bestmatch].green; 772 subColor.blue = ctable[bestmatch].blue; 773 subColor.flags = DoRed | DoGreen | DoBlue; 774 *alloced = 0; 775 } 776#ifdef XFree86Server 777 FREE(ppixIn); 778 FREE(ctable); 779#else 780 /* don't free table, save it for next time */ 781#endif 782 783 *color = subColor; 784 *exact = 0; 785} 786 787 788 789 790/* 791 * Do setup for PF_GRAYSCALE pixel format. 792 * Note that buffer may be NULL. 793 */ 794static GLboolean setup_grayscale( int client, XMesaVisual v, 795 XMesaBuffer buffer, XMesaColormap cmap ) 796{ 797 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 798 return GL_FALSE; 799 } 800 801 if (buffer) { 802 XMesaBuffer prevBuffer; 803 804 if (!cmap) { 805 return GL_FALSE; 806 } 807 808 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 809 if (prevBuffer && 810 (buffer->xm_visual->mesa_visual.rgbMode == 811 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 812 /* Copy colormap stuff from previous XMesaBuffer which uses same 813 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 814 */ 815 copy_colortable_info(buffer, prevBuffer); 816 } 817 else { 818 /* Allocate 256 shades of gray */ 819 int gray; 820 int colorsfailed = 0; 821 for (gray=0;gray<256;gray++) { 822 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 823 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 824 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 825 int exact, alloced; 826 XMesaColor xcol; 827 xcol.red = (r << 8) | r; 828 xcol.green = (g << 8) | g; 829 xcol.blue = (b << 8) | b; 830 noFaultXAllocColor( client, v->display, 831 cmap, GET_COLORMAP_SIZE(v), 832 &xcol, &exact, &alloced ); 833 if (!exact) { 834 colorsfailed++; 835 } 836 if (alloced) { 837 assert(buffer->num_alloced<256); 838 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 839 buffer->num_alloced++; 840 } 841 842 /*OLD 843 assert(gray < 576); 844 buffer->color_table[gray*3+0] = xcol.pixel; 845 buffer->color_table[gray*3+1] = xcol.pixel; 846 buffer->color_table[gray*3+2] = xcol.pixel; 847 assert(xcol.pixel < 65536); 848 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 849 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 850 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 851 */ 852 buffer->color_table[gray] = xcol.pixel; 853 assert(xcol.pixel < 65536); 854 buffer->pixel_to_r[xcol.pixel] = gray; 855 buffer->pixel_to_g[xcol.pixel] = gray; 856 buffer->pixel_to_b[xcol.pixel] = gray; 857 } 858 859 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 860 _mesa_warning(NULL, 861 "Note: %d out of 256 needed colors do not match exactly.\n", 862 colorsfailed ); 863 } 864 } 865 } 866 867 v->dithered_pf = PF_Grayscale; 868 v->undithered_pf = PF_Grayscale; 869 return GL_TRUE; 870} 871 872 873 874/* 875 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 876 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 877 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 878 * color. While this function was originally designed just for 8-bit 879 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 880 * Dithering code contributed by Bob Mercier. 881 */ 882static GLboolean setup_dithered_color( int client, XMesaVisual v, 883 XMesaBuffer buffer, XMesaColormap cmap ) 884{ 885 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 886 return GL_FALSE; 887 } 888 889 if (buffer) { 890 XMesaBuffer prevBuffer; 891 892 if (!cmap) { 893 return GL_FALSE; 894 } 895 896 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 897 if (prevBuffer && 898 (buffer->xm_visual->mesa_visual.rgbMode == 899 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 900 /* Copy colormap stuff from previous, matching XMesaBuffer. 901 * Do this to avoid time spent in noFaultXAllocColor. 902 */ 903 copy_colortable_info(buffer, prevBuffer); 904 } 905 else { 906 /* Allocate X colors and initialize color_table[], red_table[], etc */ 907 int r, g, b, i; 908 int colorsfailed = 0; 909 for (r = 0; r < DITH_R; r++) { 910 for (g = 0; g < DITH_G; g++) { 911 for (b = 0; b < DITH_B; b++) { 912 XMesaColor xcol; 913 int exact, alloced; 914 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 915 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 916 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 917 noFaultXAllocColor( client, v->display, 918 cmap, GET_COLORMAP_SIZE(v), 919 &xcol, &exact, &alloced ); 920 if (!exact) { 921 colorsfailed++; 922 } 923 if (alloced) { 924 assert(buffer->num_alloced<256); 925 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 926 buffer->num_alloced++; 927 } 928 i = DITH_MIX( r, g, b ); 929 assert(i < 576); 930 buffer->color_table[i] = xcol.pixel; 931 assert(xcol.pixel < 65536); 932 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 933 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 934 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 935 } 936 } 937 } 938 939 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 940 _mesa_warning(NULL, 941 "Note: %d out of %d needed colors do not match exactly.\n", 942 colorsfailed, DITH_R * DITH_G * DITH_B ); 943 } 944 } 945 } 946 947 v->dithered_pf = PF_Dither; 948 v->undithered_pf = PF_Lookup; 949 return GL_TRUE; 950} 951 952 953/* 954 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 955 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 956 * Special dithering tables have to be initialized. 957 */ 958static void setup_8bit_hpcr( XMesaVisual v ) 959{ 960 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 961 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 962 * on the root window AND the colormap obtainable by XGetRGBColormaps 963 * for that atom must be set on the window. (see also tkInitWindow) 964 * If that colormap is not set, the output will look stripy. 965 */ 966 967 /* Setup color tables with gamma correction */ 968 int i; 969 double g; 970 971 g = 1.0 / v->RedGamma; 972 for (i=0; i<256; i++) { 973 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 974 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 975 } 976 977 g = 1.0 / v->GreenGamma; 978 for (i=0; i<256; i++) { 979 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 980 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 981 } 982 983 g = 1.0 / v->BlueGamma; 984 for (i=0; i<256; i++) { 985 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 986 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 987 } 988 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 989 v->dithered_pf = PF_HPCR; 990 991 /* which method should I use to clear */ 992 /* GL_FALSE: keep the ordinary method */ 993 /* GL_TRUE : clear with dither pattern */ 994 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 995 996 if (v->hpcr_clear_flag) { 997 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 998 DefaultRootWindow(v->display), 999 16, 2, 8); 1000#ifndef XFree86Server 1001 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1002 0, 0, 16, 2, AllPlanes, ZPixmap); 1003#endif 1004 } 1005} 1006 1007 1008/* 1009 * Setup RGB rendering for a window with a True/DirectColor visual. 1010 */ 1011static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1012 XMesaColormap cmap ) 1013{ 1014 unsigned long rmask, gmask, bmask; 1015 (void) buffer; 1016 (void) cmap; 1017 1018 /* Compute red multiplier (mask) and bit shift */ 1019 v->rshift = 0; 1020 rmask = GET_REDMASK(v); 1021 while ((rmask & 1)==0) { 1022 v->rshift++; 1023 rmask = rmask >> 1; 1024 } 1025 1026 /* Compute green multiplier (mask) and bit shift */ 1027 v->gshift = 0; 1028 gmask = GET_GREENMASK(v); 1029 while ((gmask & 1)==0) { 1030 v->gshift++; 1031 gmask = gmask >> 1; 1032 } 1033 1034 /* Compute blue multiplier (mask) and bit shift */ 1035 v->bshift = 0; 1036 bmask = GET_BLUEMASK(v); 1037 while ((bmask & 1)==0) { 1038 v->bshift++; 1039 bmask = bmask >> 1; 1040 } 1041 1042 /* 1043 * Compute component-to-pixel lookup tables and dithering kernel 1044 */ 1045 { 1046 static GLubyte kernel[16] = { 1047 0*16, 8*16, 2*16, 10*16, 1048 12*16, 4*16, 14*16, 6*16, 1049 3*16, 11*16, 1*16, 9*16, 1050 15*16, 7*16, 13*16, 5*16, 1051 }; 1052 GLint rBits = bitcount(rmask); 1053 GLint gBits = bitcount(gmask); 1054 GLint bBits = bitcount(bmask); 1055 GLint maxBits; 1056 GLuint i; 1057 1058 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1059 for (i=0; i<=rmask; i++) 1060 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1061 for (i=0; i<=gmask; i++) 1062 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1063 for (i=0; i<=bmask; i++) 1064 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1065 1066 /* convert RGB values from [0,255] to pixel components */ 1067 1068 for (i=0;i<256;i++) { 1069 GLint r = gamma_adjust(v->RedGamma, i, 255); 1070 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1071 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1072 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1073 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1074 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1075 } 1076 /* overflow protection */ 1077 for (i=256;i<512;i++) { 1078 v->RtoPixel[i] = v->RtoPixel[255]; 1079 v->GtoPixel[i] = v->GtoPixel[255]; 1080 v->BtoPixel[i] = v->BtoPixel[255]; 1081 } 1082 1083 /* setup dithering kernel */ 1084 maxBits = rBits; 1085 if (gBits > maxBits) maxBits = gBits; 1086 if (bBits > maxBits) maxBits = bBits; 1087 for (i=0;i<16;i++) { 1088 v->Kernel[i] = kernel[i] >> maxBits; 1089 } 1090 1091 v->undithered_pf = PF_Truecolor; 1092 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 1093 } 1094 1095 /* 1096 * Now check for TrueColor visuals which we can optimize. 1097 */ 1098 if ( GET_REDMASK(v) ==0x0000ff 1099 && GET_GREENMASK(v)==0x00ff00 1100 && GET_BLUEMASK(v) ==0xff0000 1101 && CHECK_BYTE_ORDER(v) 1102 && v->BitsPerPixel==32 1103 && sizeof(GLuint)==4 1104 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1105 /* common 32 bpp config used on SGI, Sun */ 1106 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1107 } 1108 else if (GET_REDMASK(v) ==0xff0000 1109 && GET_GREENMASK(v)==0x00ff00 1110 && GET_BLUEMASK(v) ==0x0000ff 1111 && CHECK_BYTE_ORDER(v) 1112 && v->BitsPerPixel==32 1113 && sizeof(GLuint)==4 1114 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1115 /* common 32 bpp config used on Linux, HP, IBM */ 1116 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1117 } 1118 else if (GET_REDMASK(v) ==0xff0000 1119 && GET_GREENMASK(v)==0x00ff00 1120 && GET_BLUEMASK(v) ==0x0000ff 1121 && CHECK_BYTE_ORDER(v) 1122 && v->BitsPerPixel==24 1123 && sizeof(GLuint)==4 1124 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1125 /* common packed 24 bpp config used on Linux */ 1126 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1127 } 1128 else if (GET_REDMASK(v) ==0xf800 1129 && GET_GREENMASK(v)==0x07e0 1130 && GET_BLUEMASK(v) ==0x001f 1131 && CHECK_BYTE_ORDER(v) 1132 && v->BitsPerPixel==16 1133 && sizeof(GLushort)==2 1134 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1135 /* 5-6-5 color weight on common PC VGA boards */ 1136 v->undithered_pf = PF_5R6G5B; 1137 v->dithered_pf = PF_Dither_5R6G5B; 1138 } 1139 else if (GET_REDMASK(v) ==0xe0 1140 && GET_GREENMASK(v)==0x1c 1141 && GET_BLUEMASK(v) ==0x03 1142 && CHECK_FOR_HPCR(v)) { 1143 setup_8bit_hpcr( v ); 1144 } 1145} 1146 1147 1148 1149/* 1150 * Setup RGB rendering for a window with a monochrome visual. 1151 */ 1152static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1153{ 1154 (void) b; 1155 v->dithered_pf = v->undithered_pf = PF_1Bit; 1156 /* if black=1 then we must flip pixel values */ 1157 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1158} 1159 1160 1161 1162/* 1163 * When a context is "made current" for the first time, we can finally 1164 * finish initializing the context's visual and buffer information. 1165 * Input: v - the XMesaVisual to initialize 1166 * b - the XMesaBuffer to initialize (may be NULL) 1167 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1168 * window - the window/pixmap we're rendering into 1169 * cmap - the colormap associated with the window/pixmap 1170 * Return: GL_TRUE=success, GL_FALSE=failure 1171 */ 1172static GLboolean initialize_visual_and_buffer( int client, 1173 XMesaVisual v, 1174 XMesaBuffer b, 1175 GLboolean rgb_flag, 1176 XMesaDrawable window, 1177 XMesaColormap cmap ) 1178{ 1179#ifndef XFree86Server 1180 XGCValues gcvalues; 1181#endif 1182 1183 if (b) { 1184 assert(b->xm_visual == v); 1185 } 1186 1187 /* Save true bits/pixel */ 1188 v->BitsPerPixel = bits_per_pixel(v); 1189 assert(v->BitsPerPixel > 0); 1190 1191 1192 if (rgb_flag==GL_FALSE) { 1193 /* COLOR-INDEXED WINDOW: 1194 * Even if the visual is TrueColor or DirectColor we treat it as 1195 * being color indexed. This is weird but might be useful to someone. 1196 */ 1197 v->dithered_pf = v->undithered_pf = PF_Index; 1198 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1199 } 1200 else { 1201 /* RGB WINDOW: 1202 * We support RGB rendering into almost any kind of visual. 1203 */ 1204 const int xclass = v->mesa_visual.visualType; 1205 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1206 setup_truecolor( v, b, cmap ); 1207 } 1208 else if (xclass==GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v)==1) { 1209 setup_monochrome( v, b ); 1210 } 1211 else if (xclass==GLX_GRAY_SCALE || xclass==GLX_STATIC_GRAY) { 1212 if (!setup_grayscale( client, v, b, cmap )) { 1213 return GL_FALSE; 1214 } 1215 } 1216 else if ((xclass==GLX_PSEUDO_COLOR || xclass==GLX_STATIC_COLOR) 1217 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1218 if (!setup_dithered_color( client, v, b, cmap )) { 1219 return GL_FALSE; 1220 } 1221 } 1222 else { 1223 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual."); 1224 return GL_FALSE; 1225 } 1226 v->mesa_visual.indexBits = 0; 1227 1228 if (_mesa_getenv("MESA_NO_DITHER")) { 1229 v->dithered_pf = v->undithered_pf; 1230 } 1231 } 1232 1233 1234 /* 1235 * If MESA_INFO env var is set print out some debugging info 1236 * which can help Brian figure out what's going on when a user 1237 * reports bugs. 1238 */ 1239 if (_mesa_getenv("MESA_INFO")) { 1240 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1241 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1242 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1243 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1244 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1245 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1246 } 1247 1248 if (b && window) { 1249 /* Do window-specific initializations */ 1250 1251 /* Window dimensions */ 1252 unsigned int w, h; 1253 get_drawable_size( v->display, window, &w, &h ); 1254 b->width = w; 1255 b->height = h; 1256 1257 b->frontbuffer = window; 1258 1259 /* Setup for single/double buffering */ 1260 if (v->mesa_visual.doubleBufferMode) { 1261 /* Double buffered */ 1262#ifndef XFree86Server 1263 b->shm = check_for_xshm( v->display ); 1264#endif 1265 xmesa_alloc_back_buffer( b ); 1266 if (b->db_state==BACK_PIXMAP) { 1267 b->buffer = (XMesaDrawable)b->backpixmap; 1268 } 1269 else { 1270 b->buffer = XIMAGE; 1271 } 1272 } 1273 else { 1274 /* Single Buffered */ 1275 b->buffer = b->frontbuffer; 1276 } 1277 1278 /* X11 graphics contexts */ 1279#ifdef XFree86Server 1280 b->gc = CreateScratchGC(v->display, window->depth); 1281#else 1282 b->gc = XCreateGC( v->display, window, 0, NULL ); 1283#endif 1284 XMesaSetFunction( v->display, b->gc, GXcopy ); 1285 1286 /* cleargc - for glClear() */ 1287#ifdef XFree86Server 1288 b->cleargc = CreateScratchGC(v->display, window->depth); 1289#else 1290 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1291#endif 1292 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1293 1294 /* 1295 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1296 * Patch contributed by Michael Pichler May 15, 1995. 1297 */ 1298#ifdef XFree86Server 1299 b->swapgc = CreateScratchGC(v->display, window->depth); 1300 { 1301 CARD32 v[1]; 1302 v[0] = FALSE; 1303 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1304 } 1305#else 1306 gcvalues.graphics_exposures = False; 1307 b->swapgc = XCreateGC( v->display, window, 1308 GCGraphicsExposures, &gcvalues); 1309#endif 1310 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1311 /* 1312 * Set fill style and tile pixmap once for all for HPCR stuff 1313 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1314 * Initialize whole stuff 1315 * Patch contributed by Jacques Leroy March 8, 1998. 1316 */ 1317 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1318 int i; 1319 for (i=0; i<16; i++) 1320 { 1321 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1322 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1323 } 1324 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1325 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1326 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1327 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1328 } 1329 1330 /* Initialize the row buffer XImage for use in write_color_span() */ 1331#ifdef XFree86Server 1332 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1333 (char *)MALLOC(MAX_WIDTH*4)); 1334#else 1335 b->rowimage = XCreateImage( v->display, 1336 v->visinfo->visual, 1337 v->visinfo->depth, 1338 ZPixmap, 0, /*format, offset*/ 1339 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1340 MAX_WIDTH, 1, /*width, height*/ 1341 32, /*bitmap_pad*/ 1342 0 /*bytes_per_line*/ ); 1343#endif 1344 if (!b->rowimage) 1345 return GL_FALSE; 1346 } 1347 1348 return GL_TRUE; 1349} 1350 1351 1352 1353/* 1354 * Convert an RGBA color to a pixel value. 1355 */ 1356unsigned long 1357xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1358 GLuint pixelFormat) 1359{ 1360 switch (pixelFormat) { 1361 case PF_Index: 1362 return 0; 1363 case PF_Truecolor: 1364 { 1365 unsigned long p; 1366 PACK_TRUECOLOR( p, r, g, b ); 1367 return p; 1368 } 1369 case PF_8A8B8G8R: 1370 return PACK_8A8B8G8R( r, g, b, a ); 1371 case PF_8R8G8B: 1372 /* fall through */ 1373 case PF_8R8G8B24: 1374 return PACK_8R8G8B( r, g, b ); 1375 case PF_5R6G5B: 1376 return PACK_5R6G5B( r, g, b ); 1377 case PF_Dither: 1378 { 1379 DITHER_SETUP; 1380 return DITHER( 1, 0, r, g, b ); 1381 } 1382 case PF_1Bit: 1383 /* 382 = (3*255)/2 */ 1384 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1385 case PF_HPCR: 1386 return DITHER_HPCR(1, 1, r, g, b); 1387 case PF_Lookup: 1388 { 1389 LOOKUP_SETUP; 1390 return LOOKUP( r, g, b ); 1391 } 1392 case PF_Grayscale: 1393 return GRAY_RGB( r, g, b ); 1394 case PF_Dither_True: 1395 /* fall through */ 1396 case PF_Dither_5R6G5B: 1397 { 1398 unsigned long p; 1399 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1400 return p; 1401 } 1402 default: 1403 _mesa_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1404 } 1405 return 0; 1406} 1407 1408 1409#define NUM_VISUAL_TYPES 6 1410 1411/** 1412 * Convert an X visual type to a GLX visual type. 1413 * 1414 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1415 * to be converted. 1416 * \return If \c visualType is a valid X visual type, a GLX visual type will 1417 * be returned. Otherwise \c GLX_NONE will be returned. 1418 * 1419 * \note 1420 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1421 * DRI CVS tree. 1422 */ 1423static GLint 1424xmesa_convert_from_x_visual_type( int visualType ) 1425{ 1426 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1427 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1428 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1429 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1430 }; 1431 1432 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1433 ? glx_visual_types[ visualType ] : GLX_NONE; 1434} 1435 1436 1437/**********************************************************************/ 1438/***** Public Functions *****/ 1439/**********************************************************************/ 1440 1441 1442/* 1443 * Create a new X/Mesa visual. 1444 * Input: display - X11 display 1445 * visinfo - an XVisualInfo pointer 1446 * rgb_flag - GL_TRUE = RGB mode, 1447 * GL_FALSE = color index mode 1448 * alpha_flag - alpha buffer requested? 1449 * db_flag - GL_TRUE = double-buffered, 1450 * GL_FALSE = single buffered 1451 * stereo_flag - stereo visual? 1452 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1453 * GL_FALSE = use an off-screen pixmap for back buffer 1454 * depth_size - requested bits/depth values, or zero 1455 * stencil_size - requested bits/stencil values, or zero 1456 * accum_red_size - requested bits/red accum values, or zero 1457 * accum_green_size - requested bits/green accum values, or zero 1458 * accum_blue_size - requested bits/blue accum values, or zero 1459 * accum_alpha_size - requested bits/alpha accum values, or zero 1460 * num_samples - number of samples/pixel if multisampling, or zero 1461 * level - visual level, usually 0 1462 * visualCaveat - ala the GLX extension, usually GLX_NONE 1463 * Return; a new XMesaVisual or 0 if error. 1464 */ 1465XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1466 XMesaVisualInfo visinfo, 1467 GLboolean rgb_flag, 1468 GLboolean alpha_flag, 1469 GLboolean db_flag, 1470 GLboolean stereo_flag, 1471 GLboolean ximage_flag, 1472 GLint depth_size, 1473 GLint stencil_size, 1474 GLint accum_red_size, 1475 GLint accum_green_size, 1476 GLint accum_blue_size, 1477 GLint accum_alpha_size, 1478 GLint num_samples, 1479 GLint level, 1480 GLint visualCaveat ) 1481{ 1482 char *gamma; 1483 XMesaVisual v; 1484 GLint red_bits, green_bits, blue_bits, alpha_bits; 1485 1486 /* For debugging only */ 1487 if (_mesa_getenv("MESA_XSYNC")) { 1488 /* This makes debugging X easier. 1489 * In your debugger, set a breakpoint on _XError to stop when an 1490 * X protocol error is generated. 1491 */ 1492#ifdef XFree86Server 1493 /* NOT_NEEDED */ 1494#else 1495 XSynchronize( display, 1 ); 1496#endif 1497 } 1498 1499 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1500 if (!v) { 1501 return NULL; 1502 } 1503 1504 /* 1505 * In the X server, NULL is passed in for the display. It will have 1506 * to be set before using this visual. See XMesaSetVisualDisplay() 1507 * below. 1508 */ 1509 v->display = display; 1510 1511 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1512 * the struct but we may need some of the information contained in it 1513 * at a later time. 1514 */ 1515#ifndef XFree86Server 1516 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1517 if(!v->visinfo) { 1518 FREE(v); 1519 return NULL; 1520 } 1521 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1522#endif 1523 1524 /* check for MESA_GAMMA environment variable */ 1525 gamma = _mesa_getenv("MESA_GAMMA"); 1526 if (gamma) { 1527 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1528 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1529 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1530 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1531 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1532 } 1533 else { 1534 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1535 } 1536 1537 v->ximage_flag = ximage_flag; 1538 1539#ifdef XFree86Server 1540 /* We could calculate these values by ourselves. nplanes is either the sum 1541 * of the red, green, and blue bits or the number index bits. 1542 * ColormapEntries is either (1U << index_bits) or 1543 * (1U << max(redBits, greenBits, blueBits)). 1544 */ 1545 v->nplanes = visinfo->nplanes; 1546 v->ColormapEntries = visinfo->ColormapEntries; 1547 1548 v->mesa_visual.redMask = visinfo->redMask; 1549 v->mesa_visual.greenMask = visinfo->greenMask; 1550 v->mesa_visual.blueMask = visinfo->blueMask; 1551 v->mesa_visual.visualID = visinfo->vid; 1552 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1553#else 1554 v->mesa_visual.redMask = visinfo->red_mask; 1555 v->mesa_visual.greenMask = visinfo->green_mask; 1556 v->mesa_visual.blueMask = visinfo->blue_mask; 1557 v->mesa_visual.visualID = visinfo->visualid; 1558 v->mesa_visual.screen = visinfo->screen; 1559#endif 1560 1561#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1562 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1563#else 1564 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1565#endif 1566 1567 v->mesa_visual.visualRating = visualCaveat; 1568 1569 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1570 1571 { 1572 const int xclass = v->mesa_visual.visualType; 1573 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1574 red_bits = bitcount(GET_REDMASK(v)); 1575 green_bits = bitcount(GET_GREENMASK(v)); 1576 blue_bits = bitcount(GET_BLUEMASK(v)); 1577 alpha_bits = 0; 1578 } 1579 else { 1580 /* this is an approximation */ 1581 int depth; 1582 depth = GET_VISUAL_DEPTH(v); 1583 red_bits = depth / 3; 1584 depth -= red_bits; 1585 green_bits = depth / 2; 1586 depth -= green_bits; 1587 blue_bits = depth; 1588 alpha_bits = 0; 1589 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1590 } 1591 } 1592 1593 if (alpha_flag && alpha_bits == 0) 1594 alpha_bits = 8; 1595 1596 _mesa_initialize_visual( &v->mesa_visual, 1597 rgb_flag, db_flag, stereo_flag, 1598 red_bits, green_bits, 1599 blue_bits, alpha_bits, 1600 v->mesa_visual.indexBits, 1601 depth_size, 1602 stencil_size, 1603 accum_red_size, accum_green_size, 1604 accum_blue_size, accum_alpha_size, 1605 0 ); 1606 1607 /* XXX minor hack */ 1608 v->mesa_visual.level = level; 1609 return v; 1610} 1611 1612 1613void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1614{ 1615 v->display = dpy; 1616} 1617 1618 1619void XMesaDestroyVisual( XMesaVisual v ) 1620{ 1621#ifndef XFree86Server 1622 FREE(v->visinfo); 1623#endif 1624 FREE(v); 1625} 1626 1627 1628 1629/** 1630 * Create a new XMesaContext. 1631 * \param v the XMesaVisual 1632 * \param share_list another XMesaContext with which to share display 1633 * lists or NULL if no sharing is wanted. 1634 * \return an XMesaContext or NULL if error. 1635 */ 1636XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1637{ 1638 static GLboolean firstTime = GL_TRUE; 1639 XMesaContext c; 1640 GLcontext *mesaCtx; 1641 struct dd_function_table functions; 1642 TNLcontext *tnl; 1643 1644 if (firstTime) { 1645 _glthread_INIT_MUTEX(_xmesa_lock); 1646 firstTime = GL_FALSE; 1647 } 1648 1649 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1650 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1651 if (!c) 1652 return NULL; 1653 1654 mesaCtx = &(c->mesa); 1655 1656 /* initialize with default driver functions, then plug in XMesa funcs */ 1657 _mesa_init_driver_functions(&functions); 1658 xmesa_init_driver_functions(v, &functions); 1659 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1660 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1661 &functions, (void *) c)) { 1662 FREE(c); 1663 return NULL; 1664 } 1665 1666 _mesa_enable_sw_extensions(mesaCtx); 1667 _mesa_enable_1_3_extensions(mesaCtx); 1668 _mesa_enable_1_4_extensions(mesaCtx); 1669 _mesa_enable_1_5_extensions(mesaCtx); 1670 _mesa_enable_2_0_extensions(mesaCtx); 1671 1672 /* finish up xmesa context initializations */ 1673 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1674 c->xm_visual = v; 1675 c->xm_draw_buffer = NULL; /* set later by XMesaMakeCurrent */ 1676 c->xm_read_buffer = NULL; /* set later by XMesaMakeCurrent */ 1677 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1678 c->display = v->display; 1679 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1680 1681 /* Initialize the software rasterizer and helper modules. 1682 */ 1683 if (!_swrast_CreateContext( mesaCtx ) || 1684 !_ac_CreateContext( mesaCtx ) || 1685 !_tnl_CreateContext( mesaCtx ) || 1686 !_swsetup_CreateContext( mesaCtx )) { 1687 _mesa_free_context_data(&c->mesa); 1688 _mesa_free(c); 1689 return NULL; 1690 } 1691 1692 /* tnl setup */ 1693 tnl = TNL_CONTEXT(mesaCtx); 1694 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1695 /* swrast setup */ 1696 xmesa_register_swrast_functions( mesaCtx ); 1697 _swsetup_Wakeup(mesaCtx); 1698 1699 return c; 1700} 1701 1702 1703 1704void XMesaDestroyContext( XMesaContext c ) 1705{ 1706 GLcontext *mesaCtx = &c->mesa; 1707#ifdef FX 1708 if (c->xm_draw_buffer && c->xm_buffer->FXctx) 1709 fxMesaDestroyContext(c->xm_draw_buffer->FXctx); 1710#endif 1711 _swsetup_DestroyContext( mesaCtx ); 1712 _swrast_DestroyContext( mesaCtx ); 1713 _tnl_DestroyContext( mesaCtx ); 1714 _ac_DestroyContext( mesaCtx ); 1715 _mesa_free_context_data( mesaCtx ); 1716 _mesa_free( c ); 1717} 1718 1719 1720 1721/* 1722 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1723 * Create a new XMesaBuffer from an X window. 1724 * Input: v - the XMesaVisual 1725 * w - the window 1726 * c - the context 1727 * Return: new XMesaBuffer or NULL if error 1728 */ 1729XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1730 XMesaContext c ) 1731{ 1732#ifndef XFree86Server 1733 XWindowAttributes attr; 1734#endif 1735#ifdef FX 1736 char *fxEnvVar; 1737#endif 1738 int client = 0; 1739 1740 XMesaBuffer b = alloc_xmesa_buffer(); 1741 if (!b) { 1742 return NULL; 1743 } 1744 1745 (void) c; 1746 1747#ifdef XFree86Server 1748 client = CLIENT_ID(((XMesaDrawable)w)->id); 1749#endif 1750 1751 assert(v); 1752 1753#ifdef XFree86Server 1754 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1755#else 1756 XGetWindowAttributes( v->display, w, &attr ); 1757 1758 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1759#endif 1760 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1761 return NULL; 1762 } 1763 1764 b->xm_visual = v; 1765 b->type = WINDOW; 1766 b->display = v->display; 1767#ifdef XFree86Server 1768 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1769#else 1770 if (attr.colormap) { 1771 b->cmap = attr.colormap; 1772 } 1773 else { 1774 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1775 /* this is weird, a window w/out a colormap!? */ 1776 /* OK, let's just allocate a new one and hope for the best */ 1777 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1778 } 1779#endif 1780 1781 /* determine back buffer implementation */ 1782 if (v->mesa_visual.doubleBufferMode) { 1783 if (v->ximage_flag) { 1784 b->db_state = BACK_XIMAGE; 1785 } 1786 else { 1787 b->db_state = BACK_PIXMAP; 1788 } 1789 } 1790 else { 1791 b->db_state = 0; 1792 } 1793 1794 _mesa_initialize_framebuffer(&b->mesa_buffer, 1795 &v->mesa_visual, 1796 v->mesa_visual.depthBits > 0, 1797 v->mesa_visual.stencilBits > 0, 1798 v->mesa_visual.accumRedBits > 0, 1799 v->mesa_visual.alphaBits > 0 ); 1800 /* XXX hack */ 1801 b->mesa_buffer.UseSoftwareAuxBuffers = GL_TRUE; 1802 1803 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1804 (XMesaDrawable)w, b->cmap )) { 1805 free_xmesa_buffer(client, b); 1806 return NULL; 1807 } 1808 1809#ifdef FX 1810 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1811 if (fxEnvVar) { 1812 if (fxEnvVar[0]!='d') { 1813 int attribs[100]; 1814 int numAttribs = 0; 1815 int hw; 1816 if (v->mesa_visual.depthBits > 0) { 1817 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1818 attribs[numAttribs++] = v->mesa_visual.depthBits; 1819 } 1820 if (v->mesa_visual.doubleBufferMode) { 1821 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1822 } 1823 if (v->mesa_visual.accumRedBits > 0) { 1824 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1825 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1826 } 1827 if (v->mesa_visual.stencilBits > 0) { 1828 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1829 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1830 } 1831 if (v->mesa_visual.alphaBits > 0) { 1832 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1833 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1834 } 1835 if (1) { 1836 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1837 attribs[numAttribs++] = (int) &(c->mesa); 1838 } 1839 attribs[numAttribs++] = FXMESA_NONE; 1840 1841 /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ 1842 hw = fxMesaSelectCurrentBoard(0); 1843 if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) { 1844 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1845 if ((v->undithered_pf!=PF_Index) && (b->backimage)) { 1846 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1847 if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) { 1848 b->FXwindowHack = GL_TRUE; 1849 FX_grSstControl(GR_CONTROL_DEACTIVATE); 1850 } 1851 else { 1852 b->FXwindowHack = GL_FALSE; 1853 } 1854 } 1855 } 1856 else { 1857 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1858 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1859 GR_REFRESH_75Hz, attribs); 1860 else 1861 b->FXctx = fxMesaCreateBestContext(0, b->width, b->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->mesa.Viewport.Width == 0) { 2103 /* initialize viewport to window size */ 2104 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2105 c->mesa.Scissor.Width = drawBuffer->width; 2106 c->mesa.Scissor.Height = drawBuffer->height; 2107 } 2108 2109 if (c->xm_visual->mesa_visual.rgbMode) { 2110 /* 2111 * Must recompute and set these pixel values because colormap 2112 * can be different for different windows. 2113 */ 2114 c->clearpixel = xmesa_color_to_pixel( c, 2115 c->clearcolor[0], 2116 c->clearcolor[1], 2117 c->clearcolor[2], 2118 c->clearcolor[3], 2119 c->xm_visual->undithered_pf); 2120 XMesaSetForeground(c->display, c->xm_draw_buffer->cleargc, c->clearpixel); 2121 } 2122 2123 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2124 c->xm_draw_buffer->wasCurrent = GL_TRUE; 2125 } 2126 else { 2127 /* Detach */ 2128 _mesa_make_current2( NULL, NULL, NULL ); 2129 } 2130 return GL_TRUE; 2131} 2132 2133 2134/* 2135 * Unbind the context c from its buffer. 2136 */ 2137GLboolean XMesaUnbindContext( XMesaContext c ) 2138{ 2139 /* A no-op for XFree86 integration purposes */ 2140 return GL_TRUE; 2141} 2142 2143 2144XMesaContext XMesaGetCurrentContext( void ) 2145{ 2146 GET_CURRENT_CONTEXT(ctx); 2147 if (ctx) { 2148 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2149 return xmesa; 2150 } 2151 else { 2152 return 0; 2153 } 2154} 2155 2156 2157XMesaBuffer XMesaGetCurrentBuffer( void ) 2158{ 2159 GET_CURRENT_CONTEXT(ctx); 2160 if (ctx) { 2161 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2162 return xmesa->xm_draw_buffer; 2163 } 2164 else { 2165 return 0; 2166 } 2167} 2168 2169 2170/* New in Mesa 3.1 */ 2171XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2172{ 2173 GET_CURRENT_CONTEXT(ctx); 2174 if (ctx) { 2175 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2176 return xmesa->xm_read_buffer; 2177 } 2178 else { 2179 return 0; 2180 } 2181} 2182 2183 2184GLboolean XMesaForceCurrent(XMesaContext c) 2185{ 2186 if (c) { 2187 if (&(c->mesa) != _mesa_get_current_context()) { 2188 _mesa_make_current(&(c->mesa), &c->xm_draw_buffer->mesa_buffer); 2189 } 2190 } 2191 else { 2192 _mesa_make_current(NULL, NULL); 2193 } 2194 return GL_TRUE; 2195} 2196 2197 2198GLboolean XMesaLoseCurrent(XMesaContext c) 2199{ 2200 (void) c; 2201 _mesa_make_current(NULL, NULL); 2202 return GL_TRUE; 2203} 2204 2205 2206/* 2207 * Switch 3Dfx support hack between window and full-screen mode. 2208 */ 2209GLboolean XMesaSetFXmode( GLint mode ) 2210{ 2211#ifdef FX 2212 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2213 if (fx && fx[0] != 'd') { 2214 GET_CURRENT_CONTEXT(ctx); 2215 GrHwConfiguration hw; 2216 if (!FX_grSstQueryHardware(&hw)) { 2217 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2218 return GL_FALSE; 2219 } 2220 if (hw.num_sst < 1) { 2221 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2222 return GL_FALSE; 2223 } 2224 if (ctx) { 2225 /* [dBorca] Hack alert: 2226 * oh, this is sooo wrong: ctx above is 2227 * really an fxMesaContext, not an XMesaContext 2228 */ 2229 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2230 if (mode == XMESA_FX_WINDOW) { 2231 if (xmesa->xm_draw_buffer->FXisHackUsable) { 2232 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2233 xmesa->xm_draw_buffer->FXwindowHack = GL_TRUE; 2234 return GL_TRUE; 2235 } 2236 } 2237 else if (mode == XMESA_FX_FULLSCREEN) { 2238 FX_grSstControl(GR_CONTROL_ACTIVATE); 2239 xmesa->xm_draw_buffer->FXwindowHack = GL_FALSE; 2240 return GL_TRUE; 2241 } 2242 else { 2243 /* Error: Bad mode value */ 2244 } 2245 } 2246 } 2247 /*fprintf(stderr, "fallthrough\n");*/ 2248#else 2249 (void) mode; 2250#endif 2251 return GL_FALSE; 2252} 2253 2254 2255 2256#ifdef FX 2257/* 2258 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2259 */ 2260static void FXgetImage( XMesaBuffer b ) 2261{ 2262 GET_CURRENT_CONTEXT(ctx); 2263 static unsigned short pixbuf[MAX_WIDTH]; 2264 GLuint x, y; 2265 int xpos, ypos; 2266 XMesaWindow root; 2267 unsigned int bw, depth, width, height; 2268 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2269 2270#ifdef XFree86Server 2271 x = b->frontbuffer->x; 2272 y = b->frontbuffer->y; 2273 width = b->frontbuffer->width; 2274 height = b->frontbuffer->height; 2275 depth = b->frontbuffer->depth; 2276#else 2277 XGetGeometry( b->xm_visual->display, b->frontbuffer, 2278 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2279#endif 2280 if (b->width != width || b->height != height) { 2281 b->width = MIN2((int)width, b->FXctx->width); 2282 b->height = MIN2((int)height, b->FXctx->height); 2283 if (b->width & 1) 2284 b->width--; /* prevent odd width */ 2285 xmesa_alloc_back_buffer( b ); 2286 } 2287 2288 /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */ 2289 /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */ 2290 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2291 /* Special case: 16bpp RGB */ 2292 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2293 0, b->FXctx->height - b->height, /*pos*/ 2294 b->width, b->height, /* size */ 2295 b->width * sizeof(GLushort), /* stride */ 2296 b->backimage->data); /* dest buffer */ 2297 } 2298 else if (b->xm_visual->dithered_pf==PF_Dither 2299 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2300 /* Special case: 8bpp RGB */ 2301 for (y=0;y<b->height;y++) { 2302 GLubyte *ptr = (GLubyte*) b->backimage->data 2303 + b->backimage->bytes_per_line * y; 2304 XDITHER_SETUP(y); 2305 2306 /* read row from 3Dfx frame buffer */ 2307 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2308 0, b->FXctx->height-(b->height-y), 2309 b->width, 1, 2310 0, 2311 pixbuf ); 2312 2313 /* write to XImage back buffer */ 2314 for (x=0;x<b->width;x++) { 2315 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2316 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2317 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2318 *ptr++ = XDITHER( x, r, g, b); 2319 } 2320 } 2321 } 2322 else { 2323 /* General case: slow! */ 2324 for (y=0;y<b->height;y++) { 2325 /* read row from 3Dfx frame buffer */ 2326 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2327 0, b->FXctx->height-(b->height-y), 2328 b->width, 1, 2329 0, 2330 pixbuf ); 2331 2332 /* write to XImage back buffer */ 2333 for (x=0;x<b->width;x++) { 2334 XMesaPutPixel(b->backimage,x,y, 2335 xmesa_color_to_pixel(xmesa, 2336 (pixbuf[x] & 0xf800) >> 8, 2337 (pixbuf[x] & 0x07e0) >> 3, 2338 (pixbuf[x] & 0x001f) << 3, 2339 0xff, 2340 b->xm_visual->undithered_pf)); 2341 } 2342 } 2343 } 2344 /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */ 2345} 2346#endif 2347 2348 2349/* 2350 * Copy the back buffer to the front buffer. If there's no back buffer 2351 * this is a no-op. 2352 */ 2353void XMesaSwapBuffers( XMesaBuffer b ) 2354{ 2355 GET_CURRENT_CONTEXT(ctx); 2356 2357 /* If we're swapping the buffer associated with the current context 2358 * we have to flush any pending rendering commands first. 2359 */ 2360 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2361 _mesa_notifySwapBuffers(ctx); 2362 2363 if (b->db_state) { 2364#ifdef FX 2365 if (b->FXctx) { 2366 fxMesaSwapBuffers(); 2367 2368 if (b->FXwindowHack) 2369 FXgetImage(b); 2370 else 2371 return; 2372 } 2373#endif 2374 if (b->backimage) { 2375 /* Copy Ximage from host's memory to server's window */ 2376#if defined(USE_XSHM) && !defined(XFree86Server) 2377 if (b->shm) { 2378 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2379 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2380 b->swapgc, 2381 b->backimage, 0, 0, 2382 0, 0, b->width, b->height, False ); 2383 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2384 } 2385 else 2386#endif 2387 { 2388 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2389 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2390 b->swapgc, 2391 b->backimage, 0, 0, 2392 0, 0, b->width, b->height ); 2393 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2394 } 2395 } 2396 else { 2397 /* Copy pixmap to window on server */ 2398 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2399 XMesaCopyArea( b->xm_visual->display, 2400 b->backpixmap, /* source drawable */ 2401 b->frontbuffer, /* dest. drawable */ 2402 b->swapgc, 2403 0, 0, b->width, b->height, /* source region */ 2404 0, 0 /* dest region */ 2405 ); 2406 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2407 } 2408 } 2409#if !defined(XFree86Server) 2410 XSync( b->xm_visual->display, False ); 2411#endif 2412} 2413 2414 2415 2416/* 2417 * Copy sub-region of back buffer to front buffer 2418 */ 2419void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2420{ 2421 GET_CURRENT_CONTEXT(ctx); 2422 2423 /* If we're swapping the buffer associated with the current context 2424 * we have to flush any pending rendering commands first. 2425 */ 2426 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2427 _mesa_notifySwapBuffers(ctx); 2428 2429 if (b->db_state) { 2430 int yTop = b->height - y - height; 2431#ifdef FX 2432 if (b->FXctx) { 2433 fxMesaSwapBuffers(); 2434 if (b->FXwindowHack) 2435 FXgetImage(b); 2436 else 2437 return; 2438 } 2439#endif 2440 if (b->backimage) { 2441 /* Copy Ximage from host's memory to server's window */ 2442#if defined(USE_XSHM) && !defined(XFree86Server) 2443 if (b->shm) { 2444 /* XXX assuming width and height aren't too large! */ 2445 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2446 b->swapgc, 2447 b->backimage, x, yTop, 2448 x, yTop, width, height, False ); 2449 /* wait for finished event??? */ 2450 } 2451 else 2452#endif 2453 { 2454 /* XXX assuming width and height aren't too large! */ 2455 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2456 b->swapgc, 2457 b->backimage, x, yTop, 2458 x, yTop, width, height ); 2459 } 2460 } 2461 else { 2462 /* Copy pixmap to window on server */ 2463 XMesaCopyArea( b->xm_visual->display, 2464 b->backpixmap, /* source drawable */ 2465 b->frontbuffer, /* dest. drawable */ 2466 b->swapgc, 2467 x, yTop, width, height, /* source region */ 2468 x, yTop /* dest region */ 2469 ); 2470 } 2471 } 2472} 2473 2474 2475/* 2476 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2477 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2478 * back buffer directly. 2479 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2480 * ximage - pointer to back buffer's XImage, or NULL 2481 * Return: GL_TRUE = context is double buffered 2482 * GL_FALSE = context is single buffered 2483 */ 2484GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2485 XMesaPixmap *pixmap, 2486 XMesaImage **ximage ) 2487{ 2488 if (b->db_state) { 2489 if (pixmap) *pixmap = b->backpixmap; 2490 if (ximage) *ximage = b->backimage; 2491 return GL_TRUE; 2492 } 2493 else { 2494 *pixmap = 0; 2495 *ximage = NULL; 2496 return GL_FALSE; 2497 } 2498} 2499 2500 2501/* 2502 * Return the depth buffer associated with an XMesaBuffer. 2503 * Input: b - the XMesa buffer handle 2504 * Output: width, height - size of buffer in pixels 2505 * bytesPerValue - bytes per depth value (2 or 4) 2506 * buffer - pointer to depth buffer values 2507 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2508 */ 2509GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2510 GLint *bytesPerValue, void **buffer ) 2511{ 2512 if (!b->mesa_buffer.DepthBuffer) { 2513 *width = 0; 2514 *height = 0; 2515 *bytesPerValue = 0; 2516 *buffer = 0; 2517 return GL_FALSE; 2518 } 2519 else { 2520 *width = b->mesa_buffer.Width; 2521 *height = b->mesa_buffer.Height; 2522 *bytesPerValue = sizeof(GLdepth); 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_8R8G8B: 2625 return PACK_8R8G8B( r, g, b ); 2626 case PF_5R6G5B: 2627 return PACK_5R6G5B( r, g, b ); 2628 case PF_Dither: 2629 { 2630 DITHER_SETUP; 2631 return DITHER( x, y, r, g, b ); 2632 } 2633 case PF_1Bit: 2634 /* 382 = (3*255)/2 */ 2635 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2636 case PF_HPCR: 2637 return DITHER_HPCR(x, y, r, g, b); 2638 case PF_Lookup: 2639 { 2640 LOOKUP_SETUP; 2641 return LOOKUP( r, g, b ); 2642 } 2643 case PF_Grayscale: 2644 return GRAY_RGB( r, g, b ); 2645 case PF_Dither_5R6G5B: 2646 /* fall through */ 2647 case PF_Dither_True: 2648 { 2649 unsigned long p; 2650 PACK_TRUEDITHER(p, x, y, r, g, b); 2651 return p; 2652 } 2653 default: 2654 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2655 } 2656 return 0; 2657} 2658 2659 2660/* 2661 * This is typically called when the window size changes and we need 2662 * to reallocate the buffer's back/depth/stencil/accum buffers. 2663 */ 2664void XMesaResizeBuffers( XMesaBuffer b ) 2665{ 2666 xmesa_resize_buffers( &(b->mesa_buffer) ); 2667 2668} 2669 2670