xm_api.c revision 928a70e4354d4884e2918ec67ddc6d8baf942c8a
1/* 2 * Mesa 3-D graphics library 3 * Version: 6.5.2 4 * 5 * Copyright (C) 1999-2006 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 * \file xm_api.c 27 * 28 * All the XMesa* API functions. 29 * 30 * 31 * NOTES: 32 * 33 * The window coordinate system origin (0,0) is in the lower-left corner 34 * of the window. X11's window coordinate origin is in the upper-left 35 * corner of the window. Therefore, most drawing functions in this 36 * file have to flip Y coordinates. 37 * 38 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 39 * in support for the MIT Shared Memory extension. If enabled, when you 40 * use an Ximage for the back buffer in double buffered mode, the "swap" 41 * operation will be faster. You must also link with -lXext. 42 * 43 * Byte swapping: If the Mesa host and the X display use a different 44 * byte order then there's some trickiness to be aware of when using 45 * XImages. The byte ordering used for the XImage is that of the X 46 * display, not the Mesa host. 47 * The color-to-pixel encoding for True/DirectColor must be done 48 * according to the display's visual red_mask, green_mask, and blue_mask. 49 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 50 * do byte swapping if needed. If one wants to directly "poke" the pixel 51 * into the XImage's buffer then the pixel must be byte swapped first. In 52 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 53 * and use XPutPixel everywhere except in the implementation of 54 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 55 * instead of using XPutPixel we "poke" our values after byte-swapping 56 * the clear pixel value if needed. 57 * 58 */ 59 60#ifdef __CYGWIN__ 61#undef WIN32 62#undef __WIN32__ 63#endif 64 65#include "glxheader.h" 66#include "GL/xmesa.h" 67#include "xmesaP.h" 68#include "context.h" 69#include "extensions.h" 70#include "framebuffer.h" 71#include "glthread.h" 72#include "imports.h" 73#include "macros.h" 74#include "renderbuffer.h" 75#include "swrast/swrast.h" 76#include "swrast_setup/swrast_setup.h" 77#include "vbo/vbo.h" 78#include "tnl/tnl.h" 79#include "tnl/t_context.h" 80#include "tnl/t_pipeline.h" 81#include "drivers/common/driverfuncs.h" 82 83#ifdef XFree86Server 84#include <GL/glxtokens.h> 85#endif 86 87/** 88 * Global X driver lock 89 */ 90_glthread_Mutex _xmesa_lock; 91 92 93 94/** 95 * Lookup tables for HPCR pixel format: 96 */ 97static short hpcr_rgbTbl[3][256] = { 98{ 99 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 100 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 101 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 102 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 103 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 104 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 105 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 106 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 107112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 108128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 109144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 110160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 111176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 112192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 113208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 114224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 115}, 116{ 117 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 118 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 119 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 120 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 121 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 122 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 123 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 124 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 125112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 126128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 127144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 128160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 129176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 130192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 131208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 132224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 133}, 134{ 135 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 136 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 137 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 138 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 139 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 140 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 141 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 142 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 143 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 144112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 145128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 146144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 147160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 148176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 149192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 150208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 151} 152}; 153 154 155 156/**********************************************************************/ 157/***** X Utility Functions *****/ 158/**********************************************************************/ 159 160 161/** 162 * Return the host's byte order as LSBFirst or MSBFirst ala X. 163 */ 164#ifndef XFree86Server 165static int host_byte_order( void ) 166{ 167 int i = 1; 168 char *cptr = (char *) &i; 169 return (*cptr==1) ? LSBFirst : MSBFirst; 170} 171#endif 172 173 174/** 175 * Check if the X Shared Memory extension is available. 176 * Return: 0 = not available 177 * 1 = shared XImage support available 178 * 2 = shared Pixmap support available also 179 */ 180static int check_for_xshm( XMesaDisplay *display ) 181{ 182#if defined(XFree86Server) 183 return 0; 184#elif defined(USE_XSHM) 185 int major, minor, ignore; 186 Bool pixmaps; 187 188 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 189 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 190 return (pixmaps==True) ? 2 : 1; 191 } 192 else { 193 return 0; 194 } 195 } 196 else { 197 return 0; 198 } 199#else 200 /* No XSHM support */ 201 return 0; 202#endif 203} 204 205 206/** 207 * Apply gamma correction to an intensity value in [0..max]. Return the 208 * new intensity value. 209 */ 210static GLint 211gamma_adjust( GLfloat gamma, GLint value, GLint max ) 212{ 213 if (gamma == 1.0) { 214 return value; 215 } 216 else { 217 double x = (double) value / (double) max; 218 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 219 } 220} 221 222 223 224/** 225 * Return the true number of bits per pixel for XImages. 226 * For example, if we request a 24-bit deep visual we may actually need/get 227 * 32bpp XImages. This function returns the appropriate bpp. 228 * Input: dpy - the X display 229 * visinfo - desribes the visual to be used for XImages 230 * Return: true number of bits per pixel for XImages 231 */ 232static int 233bits_per_pixel( XMesaVisual xmv ) 234{ 235#ifdef XFree86Server 236 const int depth = xmv->nplanes; 237 int i; 238 assert(depth > 0); 239 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 240 if (screenInfo.formats[i].depth == depth) 241 return screenInfo.formats[i].bitsPerPixel; 242 } 243 return depth; /* should never get here, but this should be safe */ 244#else 245 XMesaDisplay *dpy = xmv->display; 246 XMesaVisualInfo visinfo = xmv->visinfo; 247 XMesaImage *img; 248 int bitsPerPixel; 249 /* Create a temporary XImage */ 250 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 251 ZPixmap, 0, /*format, offset*/ 252 (char*) MALLOC(8), /*data*/ 253 1, 1, /*width, height*/ 254 32, /*bitmap_pad*/ 255 0 /*bytes_per_line*/ 256 ); 257 assert(img); 258 /* grab the bits/pixel value */ 259 bitsPerPixel = img->bits_per_pixel; 260 /* free the XImage */ 261 _mesa_free( img->data ); 262 img->data = NULL; 263 XMesaDestroyImage( img ); 264 return bitsPerPixel; 265#endif 266} 267 268 269 270/* 271 * Determine if a given X window ID is valid (window exists). 272 * Do this by calling XGetWindowAttributes() for the window and 273 * checking if we catch an X error. 274 * Input: dpy - the display 275 * win - the window to check for existance 276 * Return: GL_TRUE - window exists 277 * GL_FALSE - window doesn't exist 278 */ 279#ifndef XFree86Server 280static GLboolean WindowExistsFlag; 281 282static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 283{ 284 (void) dpy; 285 if (xerr->error_code == BadWindow) { 286 WindowExistsFlag = GL_FALSE; 287 } 288 return 0; 289} 290 291static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 292{ 293 XWindowAttributes wa; 294 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 295 WindowExistsFlag = GL_TRUE; 296 old_handler = XSetErrorHandler(window_exists_err_handler); 297 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 298 XSetErrorHandler(old_handler); 299 return WindowExistsFlag; 300} 301#endif 302 303 304 305/** 306 * Return the size of the window (or pixmap) that corresponds to the 307 * given XMesaBuffer. 308 * \param width returns width in pixels 309 * \param height returns height in pixels 310 */ 311void 312xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, 313 GLuint *width, GLuint *height) 314{ 315#ifdef XFree86Server 316 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH); 317 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT); 318#else 319 Window root; 320 Status stat; 321 int xpos, ypos; 322 unsigned int w, h, bw, depth; 323 324 _glthread_LOCK_MUTEX(_xmesa_lock); 325 XSync(b->xm_visual->display, 0); /* added for Chromium */ 326 stat = XGetGeometry(dpy, b->frontxrb->pixmap, &root, &xpos, &ypos, 327 &w, &h, &bw, &depth); 328 _glthread_UNLOCK_MUTEX(_xmesa_lock); 329 330 if (stat) { 331 *width = w; 332 *height = h; 333 } 334 else { 335 /* probably querying a window that's recently been destroyed */ 336 _mesa_warning(NULL, "XGetGeometry failed!\n"); 337 *width = *height = 1; 338 } 339#endif 340} 341 342 343 344/**********************************************************************/ 345/***** Linked list of XMesaBuffers *****/ 346/**********************************************************************/ 347 348XMesaBuffer XMesaBufferList = NULL; 349 350 351/** 352 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 353 * Note that XMesaBuffer is derived from GLframebuffer. 354 * The new XMesaBuffer will not have any size (Width=Height=0). 355 * 356 * \param d the corresponding X drawable (window or pixmap) 357 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 358 * \param vis the buffer's visual 359 * \param cmap the window's colormap, if known. 360 * \return new XMesaBuffer or NULL if any problem 361 */ 362static XMesaBuffer 363create_xmesa_buffer(XMesaDrawable d, BufferType type, 364 XMesaVisual vis, XMesaColormap cmap) 365{ 366 GLboolean swAlpha; 367 XMesaBuffer b; 368 369 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 370 371 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 372 if (!b) 373 return NULL; 374 375 b->display = vis->display; 376 b->xm_visual = vis; 377 b->type = type; 378 b->cmap = cmap; 379 380 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 381 b->mesa_buffer.Delete = xmesa_delete_framebuffer; 382 383 /* 384 * Front renderbuffer 385 */ 386 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, 387 GL_FALSE); 388 if (!b->frontxrb) { 389 _mesa_free(b); 390 return NULL; 391 } 392 b->frontxrb->Parent = b; 393 b->frontxrb->drawable = d; 394 b->frontxrb->pixmap = (XMesaPixmap) d; 395 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 396 &b->frontxrb->Base); 397 398 /* 399 * Back renderbuffer 400 */ 401 if (vis->mesa_visual.doubleBufferMode) { 402 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, 403 GL_TRUE); 404 if (!b->backxrb) { 405 /* XXX free front xrb too */ 406 _mesa_free(b); 407 return NULL; 408 } 409 b->backxrb->Parent = b; 410 /* determine back buffer implementation */ 411 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 412 413 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 414 &b->backxrb->Base); 415 } 416 417 /* 418 * Software alpha planes 419 */ 420 if (vis->mesa_visual.alphaBits > 0 421 && vis->undithered_pf != PF_8A8B8G8R 422 && vis->undithered_pf != PF_8A8R8G8B) { 423 /* Visual has alpha, but pixel format doesn't support it. 424 * We'll use an alpha renderbuffer wrapper. 425 */ 426 swAlpha = GL_TRUE; 427 } 428 else { 429 swAlpha = GL_FALSE; 430 } 431 432 /* 433 * Other renderbuffer (depth, stencil, etc) 434 */ 435 _mesa_add_soft_renderbuffers(&b->mesa_buffer, 436 GL_FALSE, /* color */ 437 vis->mesa_visual.haveDepthBuffer, 438 vis->mesa_visual.haveStencilBuffer, 439 vis->mesa_visual.haveAccumBuffer, 440 swAlpha, 441 vis->mesa_visual.numAuxBuffers > 0 ); 442 443 /* insert buffer into linked list */ 444 b->Next = XMesaBufferList; 445 XMesaBufferList = b; 446 447 return b; 448} 449 450 451/** 452 * Find an XMesaBuffer by matching X display and colormap but NOT matching 453 * the notThis buffer. 454 */ 455XMesaBuffer 456xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis) 457{ 458 XMesaBuffer b; 459 for (b=XMesaBufferList; b; b=b->Next) { 460 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 461 return b; 462 } 463 } 464 return NULL; 465} 466 467 468/** 469 * Remove buffer from linked list, delete if no longer referenced. 470 */ 471static void 472xmesa_free_buffer(XMesaBuffer buffer) 473{ 474 XMesaBuffer prev = NULL, b; 475 476 for (b = XMesaBufferList; b; b = b->Next) { 477 if (b == buffer) { 478 struct gl_framebuffer *fb = &buffer->mesa_buffer; 479 480 /* unlink buffer from list */ 481 if (prev) 482 prev->Next = buffer->Next; 483 else 484 XMesaBufferList = buffer->Next; 485 486 /* mark as delete pending */ 487 fb->DeletePending = GL_TRUE; 488 /* Dereference. If count = zero we'll really delete the buffer */ 489 _mesa_dereference_framebuffer(&fb); 490 491 return; 492 } 493 /* continue search */ 494 prev = b; 495 } 496 /* buffer not found in XMesaBufferList */ 497 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 498} 499 500 501/** 502 * Copy X color table stuff from one XMesaBuffer to another. 503 */ 504static void 505copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 506{ 507 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 508 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 509 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 510 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 511 dst->num_alloced = src->num_alloced; 512 MEMCPY(dst->alloced_colors, src->alloced_colors, 513 sizeof(src->alloced_colors)); 514} 515 516 517 518/**********************************************************************/ 519/***** Misc Private Functions *****/ 520/**********************************************************************/ 521 522 523/** 524 * A replacement for XAllocColor. This function should never 525 * fail to allocate a color. When XAllocColor fails, we return 526 * the nearest matching color. If we have to allocate many colors 527 * this function isn't too efficient; the XQueryColors() could be 528 * done just once. 529 * Written by Michael Pichler, Brian Paul, Mark Kilgard 530 * Input: dpy - X display 531 * cmap - X colormap 532 * cmapSize - size of colormap 533 * In/Out: color - the XColor struct 534 * Output: exact - 1=exact color match, 0=closest match 535 * alloced - 1=XAlloc worked, 0=XAlloc failed 536 */ 537static void 538noFaultXAllocColor( int client, 539 XMesaDisplay *dpy, 540 XMesaColormap cmap, 541 int cmapSize, 542 XMesaColor *color, 543 int *exact, int *alloced ) 544{ 545#ifdef XFree86Server 546 Pixel *ppixIn; 547 xrgb *ctable; 548#else 549 /* we'll try to cache ctable for better remote display performance */ 550 static Display *prevDisplay = NULL; 551 static XMesaColormap prevCmap = 0; 552 static int prevCmapSize = 0; 553 static XMesaColor *ctable = NULL; 554#endif 555 XMesaColor subColor; 556 int i, bestmatch; 557 double mindist; /* 3*2^16^2 exceeds long int precision. */ 558 559 (void) client; 560 561 /* First try just using XAllocColor. */ 562#ifdef XFree86Server 563 if (AllocColor(cmap, 564 &color->red, &color->green, &color->blue, 565 &color->pixel, 566 client) == Success) 567#else 568 if (XAllocColor(dpy, cmap, color)) 569#endif 570 { 571 *exact = 1; 572 *alloced = 1; 573 return; 574 } 575 576 /* Alloc failed, search for closest match */ 577 578 /* Retrieve color table entries. */ 579 /* XXX alloca candidate. */ 580#ifdef XFree86Server 581 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 582 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 583 for (i = 0; i < cmapSize; i++) { 584 ppixIn[i] = i; 585 } 586 QueryColors(cmap, cmapSize, ppixIn, ctable); 587#else 588 if (prevDisplay != dpy || prevCmap != cmap 589 || prevCmapSize != cmapSize || !ctable) { 590 /* free previously cached color table */ 591 if (ctable) 592 _mesa_free(ctable); 593 /* Get the color table from X */ 594 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 595 assert(ctable); 596 for (i = 0; i < cmapSize; i++) { 597 ctable[i].pixel = i; 598 } 599 XQueryColors(dpy, cmap, ctable, cmapSize); 600 prevDisplay = dpy; 601 prevCmap = cmap; 602 prevCmapSize = cmapSize; 603 } 604#endif 605 606 /* Find best match. */ 607 bestmatch = -1; 608 mindist = 0.0; 609 for (i = 0; i < cmapSize; i++) { 610 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 611 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 612 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 613 double dist = dr * dr + dg * dg + db * db; 614 if (bestmatch < 0 || dist < mindist) { 615 bestmatch = i; 616 mindist = dist; 617 } 618 } 619 620 /* Return result. */ 621 subColor.red = ctable[bestmatch].red; 622 subColor.green = ctable[bestmatch].green; 623 subColor.blue = ctable[bestmatch].blue; 624 /* Try to allocate the closest match color. This should only 625 * fail if the cell is read/write. Otherwise, we're incrementing 626 * the cell's reference count. 627 */ 628#ifdef XFree86Server 629 if (AllocColor(cmap, 630 &subColor.red, &subColor.green, &subColor.blue, 631 &subColor.pixel, 632 client) == Success) { 633#else 634 if (XAllocColor(dpy, cmap, &subColor)) { 635#endif 636 *alloced = 1; 637 } 638 else { 639 /* do this to work around a problem reported by Frank Ortega */ 640 subColor.pixel = (unsigned long) bestmatch; 641 subColor.red = ctable[bestmatch].red; 642 subColor.green = ctable[bestmatch].green; 643 subColor.blue = ctable[bestmatch].blue; 644 subColor.flags = DoRed | DoGreen | DoBlue; 645 *alloced = 0; 646 } 647#ifdef XFree86Server 648 _mesa_free(ppixIn); 649 _mesa_free(ctable); 650#else 651 /* don't free table, save it for next time */ 652#endif 653 654 *color = subColor; 655 *exact = 0; 656} 657 658 659 660/** 661 * Do setup for PF_GRAYSCALE pixel format. 662 * Note that buffer may be NULL. 663 */ 664static GLboolean 665setup_grayscale(int client, XMesaVisual v, 666 XMesaBuffer buffer, XMesaColormap cmap) 667{ 668 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 669 return GL_FALSE; 670 } 671 672 if (buffer) { 673 XMesaBuffer prevBuffer; 674 675 if (!cmap) { 676 return GL_FALSE; 677 } 678 679 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 680 if (prevBuffer && 681 (buffer->xm_visual->mesa_visual.rgbMode == 682 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 683 /* Copy colormap stuff from previous XMesaBuffer which uses same 684 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 685 */ 686 copy_colortable_info(buffer, prevBuffer); 687 } 688 else { 689 /* Allocate 256 shades of gray */ 690 int gray; 691 int colorsfailed = 0; 692 for (gray=0;gray<256;gray++) { 693 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 694 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 695 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 696 int exact, alloced; 697 XMesaColor xcol; 698 xcol.red = (r << 8) | r; 699 xcol.green = (g << 8) | g; 700 xcol.blue = (b << 8) | b; 701 noFaultXAllocColor( client, v->display, 702 cmap, GET_COLORMAP_SIZE(v), 703 &xcol, &exact, &alloced ); 704 if (!exact) { 705 colorsfailed++; 706 } 707 if (alloced) { 708 assert(buffer->num_alloced<256); 709 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 710 buffer->num_alloced++; 711 } 712 713 /*OLD 714 assert(gray < 576); 715 buffer->color_table[gray*3+0] = xcol.pixel; 716 buffer->color_table[gray*3+1] = xcol.pixel; 717 buffer->color_table[gray*3+2] = xcol.pixel; 718 assert(xcol.pixel < 65536); 719 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 720 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 721 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 722 */ 723 buffer->color_table[gray] = xcol.pixel; 724 assert(xcol.pixel < 65536); 725 buffer->pixel_to_r[xcol.pixel] = gray; 726 buffer->pixel_to_g[xcol.pixel] = gray; 727 buffer->pixel_to_b[xcol.pixel] = gray; 728 } 729 730 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 731 _mesa_warning(NULL, 732 "Note: %d out of 256 needed colors do not match exactly.\n", 733 colorsfailed ); 734 } 735 } 736 } 737 738 v->dithered_pf = PF_Grayscale; 739 v->undithered_pf = PF_Grayscale; 740 return GL_TRUE; 741} 742 743 744 745/** 746 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 747 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 748 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 749 * color. While this function was originally designed just for 8-bit 750 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 751 * Dithering code contributed by Bob Mercier. 752 */ 753static GLboolean 754setup_dithered_color(int client, XMesaVisual v, 755 XMesaBuffer buffer, XMesaColormap cmap) 756{ 757 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 758 return GL_FALSE; 759 } 760 761 if (buffer) { 762 XMesaBuffer prevBuffer; 763 764 if (!cmap) { 765 return GL_FALSE; 766 } 767 768 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 769 if (prevBuffer && 770 (buffer->xm_visual->mesa_visual.rgbMode == 771 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 772 /* Copy colormap stuff from previous, matching XMesaBuffer. 773 * Do this to avoid time spent in noFaultXAllocColor. 774 */ 775 copy_colortable_info(buffer, prevBuffer); 776 } 777 else { 778 /* Allocate X colors and initialize color_table[], red_table[], etc */ 779 int r, g, b, i; 780 int colorsfailed = 0; 781 for (r = 0; r < DITH_R; r++) { 782 for (g = 0; g < DITH_G; g++) { 783 for (b = 0; b < DITH_B; b++) { 784 XMesaColor xcol; 785 int exact, alloced; 786 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 787 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 788 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 789 noFaultXAllocColor( client, v->display, 790 cmap, GET_COLORMAP_SIZE(v), 791 &xcol, &exact, &alloced ); 792 if (!exact) { 793 colorsfailed++; 794 } 795 if (alloced) { 796 assert(buffer->num_alloced<256); 797 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 798 buffer->num_alloced++; 799 } 800 i = DITH_MIX( r, g, b ); 801 assert(i < 576); 802 buffer->color_table[i] = xcol.pixel; 803 assert(xcol.pixel < 65536); 804 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 805 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 806 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 807 } 808 } 809 } 810 811 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 812 _mesa_warning(NULL, 813 "Note: %d out of %d needed colors do not match exactly.\n", 814 colorsfailed, DITH_R * DITH_G * DITH_B ); 815 } 816 } 817 } 818 819 v->dithered_pf = PF_Dither; 820 v->undithered_pf = PF_Lookup; 821 return GL_TRUE; 822} 823 824 825/** 826 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 827 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 828 * Special dithering tables have to be initialized. 829 */ 830static void 831setup_8bit_hpcr(XMesaVisual v) 832{ 833 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 834 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 835 * on the root window AND the colormap obtainable by XGetRGBColormaps 836 * for that atom must be set on the window. (see also tkInitWindow) 837 * If that colormap is not set, the output will look stripy. 838 */ 839 840 /* Setup color tables with gamma correction */ 841 int i; 842 double g; 843 844 g = 1.0 / v->RedGamma; 845 for (i=0; i<256; i++) { 846 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 847 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 848 } 849 850 g = 1.0 / v->GreenGamma; 851 for (i=0; i<256; i++) { 852 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 853 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 854 } 855 856 g = 1.0 / v->BlueGamma; 857 for (i=0; i<256; i++) { 858 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 859 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 860 } 861 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 862 v->dithered_pf = PF_HPCR; 863 864 /* which method should I use to clear */ 865 /* GL_FALSE: keep the ordinary method */ 866 /* GL_TRUE : clear with dither pattern */ 867 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 868 869 if (v->hpcr_clear_flag) { 870 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 871 DefaultRootWindow(v->display), 872 16, 2, 8); 873#ifndef XFree86Server 874 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 875 0, 0, 16, 2, AllPlanes, ZPixmap); 876#endif 877 } 878} 879 880 881/** 882 * Setup RGB rendering for a window with a True/DirectColor visual. 883 */ 884static void 885setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) 886{ 887 unsigned long rmask, gmask, bmask; 888 (void) buffer; 889 (void) cmap; 890 891 /* Compute red multiplier (mask) and bit shift */ 892 v->rshift = 0; 893 rmask = GET_REDMASK(v); 894 while ((rmask & 1)==0) { 895 v->rshift++; 896 rmask = rmask >> 1; 897 } 898 899 /* Compute green multiplier (mask) and bit shift */ 900 v->gshift = 0; 901 gmask = GET_GREENMASK(v); 902 while ((gmask & 1)==0) { 903 v->gshift++; 904 gmask = gmask >> 1; 905 } 906 907 /* Compute blue multiplier (mask) and bit shift */ 908 v->bshift = 0; 909 bmask = GET_BLUEMASK(v); 910 while ((bmask & 1)==0) { 911 v->bshift++; 912 bmask = bmask >> 1; 913 } 914 915 /* 916 * Compute component-to-pixel lookup tables and dithering kernel 917 */ 918 { 919 static GLubyte kernel[16] = { 920 0*16, 8*16, 2*16, 10*16, 921 12*16, 4*16, 14*16, 6*16, 922 3*16, 11*16, 1*16, 9*16, 923 15*16, 7*16, 13*16, 5*16, 924 }; 925 GLint rBits = _mesa_bitcount(rmask); 926 GLint gBits = _mesa_bitcount(gmask); 927 GLint bBits = _mesa_bitcount(bmask); 928 GLint maxBits; 929 GLuint i; 930 931 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 932 for (i=0; i<=rmask; i++) 933 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 934 for (i=0; i<=gmask; i++) 935 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 936 for (i=0; i<=bmask; i++) 937 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 938 939 /* convert RGB values from [0,255] to pixel components */ 940 941 for (i=0;i<256;i++) { 942 GLint r = gamma_adjust(v->RedGamma, i, 255); 943 GLint g = gamma_adjust(v->GreenGamma, i, 255); 944 GLint b = gamma_adjust(v->BlueGamma, i, 255); 945 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 946 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 947 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 948 } 949 /* overflow protection */ 950 for (i=256;i<512;i++) { 951 v->RtoPixel[i] = v->RtoPixel[255]; 952 v->GtoPixel[i] = v->GtoPixel[255]; 953 v->BtoPixel[i] = v->BtoPixel[255]; 954 } 955 956 /* setup dithering kernel */ 957 maxBits = rBits; 958 if (gBits > maxBits) maxBits = gBits; 959 if (bBits > maxBits) maxBits = bBits; 960 for (i=0;i<16;i++) { 961 v->Kernel[i] = kernel[i] >> maxBits; 962 } 963 964 v->undithered_pf = PF_Truecolor; 965 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 966 } 967 968 /* 969 * Now check for TrueColor visuals which we can optimize. 970 */ 971 if ( GET_REDMASK(v) ==0x0000ff 972 && GET_GREENMASK(v)==0x00ff00 973 && GET_BLUEMASK(v) ==0xff0000 974 && CHECK_BYTE_ORDER(v) 975 && v->BitsPerPixel==32 976 && sizeof(GLuint)==4 977 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 978 /* common 32 bpp config used on SGI, Sun */ 979 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 980 } 981 else if (GET_REDMASK(v) ==0xff0000 982 && GET_GREENMASK(v)==0x00ff00 983 && GET_BLUEMASK(v) ==0x0000ff 984 && CHECK_BYTE_ORDER(v) 985 && v->BitsPerPixel==32 986 && sizeof(GLuint)==4 987 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 988 /* common 32 bpp config used on Linux, HP, IBM */ 989 if (GET_VISUAL_DEPTH(v)==32) 990 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; 991 else 992 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 993 } 994 else if (GET_REDMASK(v) ==0xff0000 995 && GET_GREENMASK(v)==0x00ff00 996 && GET_BLUEMASK(v) ==0x0000ff 997 && CHECK_BYTE_ORDER(v) 998 && v->BitsPerPixel==24 999 && sizeof(GLuint)==4 1000 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1001 /* common packed 24 bpp config used on Linux */ 1002 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1003 } 1004 else if (GET_REDMASK(v) ==0xf800 1005 && GET_GREENMASK(v)==0x07e0 1006 && GET_BLUEMASK(v) ==0x001f 1007 && CHECK_BYTE_ORDER(v) 1008 && v->BitsPerPixel==16 1009 && sizeof(GLushort)==2 1010 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1011 /* 5-6-5 color weight on common PC VGA boards */ 1012 v->undithered_pf = PF_5R6G5B; 1013 v->dithered_pf = PF_Dither_5R6G5B; 1014 } 1015 else if (GET_REDMASK(v) ==0xe0 1016 && GET_GREENMASK(v)==0x1c 1017 && GET_BLUEMASK(v) ==0x03 1018 && CHECK_FOR_HPCR(v)) { 1019 setup_8bit_hpcr( v ); 1020 } 1021} 1022 1023 1024 1025/** 1026 * Setup RGB rendering for a window with a monochrome visual. 1027 */ 1028static void 1029setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1030{ 1031 (void) b; 1032 v->dithered_pf = v->undithered_pf = PF_1Bit; 1033 /* if black=1 then we must flip pixel values */ 1034 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1035} 1036 1037 1038 1039/** 1040 * When a context is bound for the first time, we can finally finish 1041 * initializing the context's visual and buffer information. 1042 * \param v the XMesaVisual to initialize 1043 * \param b the XMesaBuffer to initialize (may be NULL) 1044 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 1045 * \param window the window/pixmap we're rendering into 1046 * \param cmap the colormap associated with the window/pixmap 1047 * \return GL_TRUE=success, GL_FALSE=failure 1048 */ 1049static GLboolean 1050initialize_visual_and_buffer(int client, XMesaVisual v, XMesaBuffer b, 1051 GLboolean rgb_flag, XMesaDrawable window, 1052 XMesaColormap cmap) 1053{ 1054 ASSERT(!b || b->xm_visual == v); 1055 1056 /* Save true bits/pixel */ 1057 v->BitsPerPixel = bits_per_pixel(v); 1058 assert(v->BitsPerPixel > 0); 1059 1060 if (rgb_flag == GL_FALSE) { 1061 /* COLOR-INDEXED WINDOW: 1062 * Even if the visual is TrueColor or DirectColor we treat it as 1063 * being color indexed. This is weird but might be useful to someone. 1064 */ 1065 v->dithered_pf = v->undithered_pf = PF_Index; 1066 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1067 } 1068 else { 1069 /* RGB WINDOW: 1070 * We support RGB rendering into almost any kind of visual. 1071 */ 1072 const int xclass = v->mesa_visual.visualType; 1073 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1074 setup_truecolor( v, b, cmap ); 1075 } 1076 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { 1077 setup_monochrome( v, b ); 1078 } 1079 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { 1080 if (!setup_grayscale( client, v, b, cmap )) { 1081 return GL_FALSE; 1082 } 1083 } 1084 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) 1085 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1086 if (!setup_dithered_color( client, v, b, cmap )) { 1087 return GL_FALSE; 1088 } 1089 } 1090 else { 1091 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 1092 return GL_FALSE; 1093 } 1094 v->mesa_visual.indexBits = 0; 1095 1096 if (_mesa_getenv("MESA_NO_DITHER")) { 1097 v->dithered_pf = v->undithered_pf; 1098 } 1099 } 1100 1101 1102 /* 1103 * If MESA_INFO env var is set print out some debugging info 1104 * which can help Brian figure out what's going on when a user 1105 * reports bugs. 1106 */ 1107 if (_mesa_getenv("MESA_INFO")) { 1108 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1109 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1110 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1111 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1112 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1113 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1114 } 1115 1116 if (b && window) { 1117 /* Do window-specific initializations */ 1118 1119 /* these should have been set in create_xmesa_buffer */ 1120 ASSERT(b->frontxrb->drawable == window); 1121 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 1122 1123 /* Setup for single/double buffering */ 1124 if (v->mesa_visual.doubleBufferMode) { 1125 /* Double buffered */ 1126 b->shm = check_for_xshm( v->display ); 1127 } 1128 1129 /* X11 graphics contexts */ 1130#ifdef XFree86Server 1131 b->gc = CreateScratchGC(v->display, window->depth); 1132#else 1133 b->gc = XCreateGC( v->display, window, 0, NULL ); 1134#endif 1135 XMesaSetFunction( v->display, b->gc, GXcopy ); 1136 1137 /* cleargc - for glClear() */ 1138#ifdef XFree86Server 1139 b->cleargc = CreateScratchGC(v->display, window->depth); 1140#else 1141 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1142#endif 1143 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1144 1145 /* 1146 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1147 * Patch contributed by Michael Pichler May 15, 1995. 1148 */ 1149#ifdef XFree86Server 1150 b->swapgc = CreateScratchGC(v->display, window->depth); 1151 { 1152 CARD32 v[1]; 1153 v[0] = FALSE; 1154 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1155 } 1156#else 1157 { 1158 XGCValues gcvalues; 1159 gcvalues.graphics_exposures = False; 1160 b->swapgc = XCreateGC(v->display, window, 1161 GCGraphicsExposures, &gcvalues); 1162 } 1163#endif 1164 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1165 /* 1166 * Set fill style and tile pixmap once for all for HPCR stuff 1167 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1168 * Initialize whole stuff 1169 * Patch contributed by Jacques Leroy March 8, 1998. 1170 */ 1171 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { 1172 int i; 1173 for (i = 0; i < 16; i++) { 1174 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1175 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1176 } 1177 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1178 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1179 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1180 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1181 } 1182 1183 /* Initialize the row buffer XImage for use in write_color_span() */ 1184#ifdef XFree86Server 1185 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1186 (char *)MALLOC(MAX_WIDTH*4)); 1187#else 1188 b->rowimage = XCreateImage( v->display, 1189 v->visinfo->visual, 1190 v->visinfo->depth, 1191 ZPixmap, 0, /*format, offset*/ 1192 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1193 MAX_WIDTH, 1, /*width, height*/ 1194 32, /*bitmap_pad*/ 1195 0 /*bytes_per_line*/ ); 1196#endif 1197 if (!b->rowimage) 1198 return GL_FALSE; 1199 } 1200 1201 return GL_TRUE; 1202} 1203 1204 1205 1206/* 1207 * Convert an RGBA color to a pixel value. 1208 */ 1209unsigned long 1210xmesa_color_to_pixel(GLcontext *ctx, 1211 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1212 GLuint pixelFormat) 1213{ 1214 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1215 switch (pixelFormat) { 1216 case PF_Index: 1217 return 0; 1218 case PF_Truecolor: 1219 { 1220 unsigned long p; 1221 PACK_TRUECOLOR( p, r, g, b ); 1222 return p; 1223 } 1224 case PF_8A8B8G8R: 1225 return PACK_8A8B8G8R( r, g, b, a ); 1226 case PF_8A8R8G8B: 1227 return PACK_8A8R8G8B( r, g, b, a ); 1228 case PF_8R8G8B: 1229 /* fall through */ 1230 case PF_8R8G8B24: 1231 return PACK_8R8G8B( r, g, b ); 1232 case PF_5R6G5B: 1233 return PACK_5R6G5B( r, g, b ); 1234 case PF_Dither: 1235 { 1236 DITHER_SETUP; 1237 return DITHER( 1, 0, r, g, b ); 1238 } 1239 case PF_1Bit: 1240 /* 382 = (3*255)/2 */ 1241 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1242 case PF_HPCR: 1243 return DITHER_HPCR(1, 1, r, g, b); 1244 case PF_Lookup: 1245 { 1246 LOOKUP_SETUP; 1247 return LOOKUP( r, g, b ); 1248 } 1249 case PF_Grayscale: 1250 return GRAY_RGB( r, g, b ); 1251 case PF_Dither_True: 1252 /* fall through */ 1253 case PF_Dither_5R6G5B: 1254 { 1255 unsigned long p; 1256 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1257 return p; 1258 } 1259 default: 1260 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1261 } 1262 return 0; 1263} 1264 1265 1266#define NUM_VISUAL_TYPES 6 1267 1268/** 1269 * Convert an X visual type to a GLX visual type. 1270 * 1271 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1272 * to be converted. 1273 * \return If \c visualType is a valid X visual type, a GLX visual type will 1274 * be returned. Otherwise \c GLX_NONE will be returned. 1275 * 1276 * \note 1277 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1278 * DRI CVS tree. 1279 */ 1280static GLint 1281xmesa_convert_from_x_visual_type( int visualType ) 1282{ 1283 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1284 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1285 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1286 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1287 }; 1288 1289 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1290 ? glx_visual_types[ visualType ] : GLX_NONE; 1291} 1292 1293 1294/**********************************************************************/ 1295/***** Public Functions *****/ 1296/**********************************************************************/ 1297 1298 1299/* 1300 * Create a new X/Mesa visual. 1301 * Input: display - X11 display 1302 * visinfo - an XVisualInfo pointer 1303 * rgb_flag - GL_TRUE = RGB mode, 1304 * GL_FALSE = color index mode 1305 * alpha_flag - alpha buffer requested? 1306 * db_flag - GL_TRUE = double-buffered, 1307 * GL_FALSE = single buffered 1308 * stereo_flag - stereo visual? 1309 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1310 * GL_FALSE = use an off-screen pixmap for back buffer 1311 * depth_size - requested bits/depth values, or zero 1312 * stencil_size - requested bits/stencil values, or zero 1313 * accum_red_size - requested bits/red accum values, or zero 1314 * accum_green_size - requested bits/green accum values, or zero 1315 * accum_blue_size - requested bits/blue accum values, or zero 1316 * accum_alpha_size - requested bits/alpha accum values, or zero 1317 * num_samples - number of samples/pixel if multisampling, or zero 1318 * level - visual level, usually 0 1319 * visualCaveat - ala the GLX extension, usually GLX_NONE 1320 * Return; a new XMesaVisual or 0 if error. 1321 */ 1322XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1323 XMesaVisualInfo visinfo, 1324 GLboolean rgb_flag, 1325 GLboolean alpha_flag, 1326 GLboolean db_flag, 1327 GLboolean stereo_flag, 1328 GLboolean ximage_flag, 1329 GLint depth_size, 1330 GLint stencil_size, 1331 GLint accum_red_size, 1332 GLint accum_green_size, 1333 GLint accum_blue_size, 1334 GLint accum_alpha_size, 1335 GLint num_samples, 1336 GLint level, 1337 GLint visualCaveat ) 1338{ 1339 char *gamma; 1340 XMesaVisual v; 1341 GLint red_bits, green_bits, blue_bits, alpha_bits; 1342 1343#ifndef XFree86Server 1344 /* For debugging only */ 1345 if (_mesa_getenv("MESA_XSYNC")) { 1346 /* This makes debugging X easier. 1347 * In your debugger, set a breakpoint on _XError to stop when an 1348 * X protocol error is generated. 1349 */ 1350 XSynchronize( display, 1 ); 1351 } 1352#endif 1353 1354 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1355 if (!v) { 1356 return NULL; 1357 } 1358 1359 /* 1360 * In the X server, NULL is passed in for the display. It will have 1361 * to be set before using this visual. See XMesaSetVisualDisplay() 1362 * below. 1363 */ 1364 v->display = display; 1365 1366 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 1367 * the struct but we may need some of the information contained in it 1368 * at a later time. 1369 */ 1370#ifndef XFree86Server 1371 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1372 if(!v->visinfo) { 1373 _mesa_free(v); 1374 return NULL; 1375 } 1376 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1377#endif 1378 1379 /* check for MESA_GAMMA environment variable */ 1380 gamma = _mesa_getenv("MESA_GAMMA"); 1381 if (gamma) { 1382 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1383 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1384 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1385 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1386 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1387 } 1388 else { 1389 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1390 } 1391 1392 v->ximage_flag = ximage_flag; 1393 1394#ifdef XFree86Server 1395 /* We could calculate these values by ourselves. nplanes is either the sum 1396 * of the red, green, and blue bits or the number index bits. 1397 * ColormapEntries is either (1U << index_bits) or 1398 * (1U << max(redBits, greenBits, blueBits)). 1399 */ 1400 assert(visinfo->nplanes > 0); 1401 v->nplanes = visinfo->nplanes; 1402 v->ColormapEntries = visinfo->ColormapEntries; 1403 1404 v->mesa_visual.redMask = visinfo->redMask; 1405 v->mesa_visual.greenMask = visinfo->greenMask; 1406 v->mesa_visual.blueMask = visinfo->blueMask; 1407 v->mesa_visual.visualID = visinfo->vid; 1408 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1409#else 1410 v->mesa_visual.redMask = visinfo->red_mask; 1411 v->mesa_visual.greenMask = visinfo->green_mask; 1412 v->mesa_visual.blueMask = visinfo->blue_mask; 1413 v->mesa_visual.visualID = visinfo->visualid; 1414 v->mesa_visual.screen = visinfo->screen; 1415#endif 1416 1417#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1418 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1419#else 1420 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1421#endif 1422 1423 v->mesa_visual.visualRating = visualCaveat; 1424 1425 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1426 1427 { 1428 const int xclass = v->mesa_visual.visualType; 1429 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1430 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1431 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1432 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1433 alpha_bits = 0; 1434 } 1435 else { 1436 /* this is an approximation */ 1437 int depth; 1438 depth = GET_VISUAL_DEPTH(v); 1439 red_bits = depth / 3; 1440 depth -= red_bits; 1441 green_bits = depth / 2; 1442 depth -= green_bits; 1443 blue_bits = depth; 1444 alpha_bits = 0; 1445 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1446 } 1447 } 1448 1449 if (alpha_flag && alpha_bits == 0) 1450 alpha_bits = 8; 1451 1452 _mesa_initialize_visual( &v->mesa_visual, 1453 rgb_flag, db_flag, stereo_flag, 1454 red_bits, green_bits, 1455 blue_bits, alpha_bits, 1456 v->mesa_visual.indexBits, 1457 depth_size, 1458 stencil_size, 1459 accum_red_size, accum_green_size, 1460 accum_blue_size, accum_alpha_size, 1461 0 ); 1462 1463 /* XXX minor hack */ 1464 v->mesa_visual.level = level; 1465 return v; 1466} 1467 1468 1469void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1470{ 1471 v->display = dpy; 1472} 1473 1474 1475void XMesaDestroyVisual( XMesaVisual v ) 1476{ 1477#ifndef XFree86Server 1478 _mesa_free(v->visinfo); 1479#endif 1480 _mesa_free(v); 1481} 1482 1483 1484 1485/** 1486 * Create a new XMesaContext. 1487 * \param v the XMesaVisual 1488 * \param share_list another XMesaContext with which to share display 1489 * lists or NULL if no sharing is wanted. 1490 * \return an XMesaContext or NULL if error. 1491 */ 1492XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1493{ 1494 static GLboolean firstTime = GL_TRUE; 1495 XMesaContext c; 1496 GLcontext *mesaCtx; 1497 struct dd_function_table functions; 1498 TNLcontext *tnl; 1499 1500 if (firstTime) { 1501 _glthread_INIT_MUTEX(_xmesa_lock); 1502 firstTime = GL_FALSE; 1503 } 1504 1505 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1506 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1507 if (!c) 1508 return NULL; 1509 1510 mesaCtx = &(c->mesa); 1511 1512 /* initialize with default driver functions, then plug in XMesa funcs */ 1513 _mesa_init_driver_functions(&functions); 1514 xmesa_init_driver_functions(v, &functions); 1515 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1516 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1517 &functions, (void *) c)) { 1518 _mesa_free(c); 1519 return NULL; 1520 } 1521 1522 _mesa_enable_sw_extensions(mesaCtx); 1523 _mesa_enable_1_3_extensions(mesaCtx); 1524 _mesa_enable_1_4_extensions(mesaCtx); 1525 _mesa_enable_1_5_extensions(mesaCtx); 1526 _mesa_enable_2_0_extensions(mesaCtx); 1527#if ENABLE_EXT_texure_compression_s3tc 1528 if (c->Mesa_DXTn) { 1529 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1530 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1531 } 1532 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1533#endif 1534#if ENABLE_EXT_timer_query 1535 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1536#endif 1537 1538#ifdef XFree86Server 1539 /* If we're running in the X server, do bounds checking to prevent 1540 * segfaults and server crashes! 1541 */ 1542 mesaCtx->Const.CheckArrayBounds = GL_TRUE; 1543#endif 1544 1545 /* finish up xmesa context initializations */ 1546 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1547 c->xm_visual = v; 1548 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1549 c->display = v->display; 1550 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1551 1552 /* Initialize the software rasterizer and helper modules. 1553 */ 1554 if (!_swrast_CreateContext( mesaCtx ) || 1555 !_vbo_CreateContext( mesaCtx ) || 1556 !_tnl_CreateContext( mesaCtx ) || 1557 !_swsetup_CreateContext( mesaCtx )) { 1558 _mesa_free_context_data(&c->mesa); 1559 _mesa_free(c); 1560 return NULL; 1561 } 1562 1563 /* tnl setup */ 1564 tnl = TNL_CONTEXT(mesaCtx); 1565 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1566 /* swrast setup */ 1567 xmesa_register_swrast_functions( mesaCtx ); 1568 _swsetup_Wakeup(mesaCtx); 1569 1570 return c; 1571} 1572 1573 1574 1575void XMesaDestroyContext( XMesaContext c ) 1576{ 1577 GLcontext *mesaCtx = &c->mesa; 1578#ifdef FX 1579 XMesaBuffer xmbuf = XMESA_BUFFER(mesaCtx->DrawBuffer); 1580 1581 if (xmbuf && xmbuf->FXctx) 1582 fxMesaDestroyContext(xmbuf->FXctx); 1583#endif 1584 _swsetup_DestroyContext( mesaCtx ); 1585 _swrast_DestroyContext( mesaCtx ); 1586 _tnl_DestroyContext( mesaCtx ); 1587 _vbo_DestroyContext( mesaCtx ); 1588 _mesa_free_context_data( mesaCtx ); 1589 _mesa_free( c ); 1590} 1591 1592 1593 1594/** 1595 * Private function for creating an XMesaBuffer which corresponds to an 1596 * X window or pixmap. 1597 * \param v the window's XMesaVisual 1598 * \param w the window we're wrapping 1599 * \param c context used to initialize the buffer if 3Dfx mode in use. 1600 * \return new XMesaBuffer or NULL if error 1601 */ 1602XMesaBuffer 1603XMesaCreateWindowBuffer2(XMesaVisual v, XMesaWindow w, XMesaContext c) 1604{ 1605#ifndef XFree86Server 1606 XWindowAttributes attr; 1607#endif 1608#ifdef FX 1609 char *fxEnvVar; 1610#endif 1611 int client = 0; 1612 XMesaBuffer b; 1613 XMesaColormap cmap; 1614 1615 assert(v); 1616 assert(w); 1617 (void) c; 1618 1619 /* Check that window depth matches visual depth */ 1620#ifdef XFree86Server 1621 client = CLIENT_ID(((XMesaDrawable)w)->id); 1622 1623 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1624 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1625 GET_VISUAL_DEPTH(v), ((XMesaDrawable) w)->depth); 1626 return NULL; 1627 } 1628#else 1629 XGetWindowAttributes( v->display, w, &attr ); 1630 1631 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1632 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1633 GET_VISUAL_DEPTH(v), attr.depth); 1634 return NULL; 1635 } 1636#endif 1637 1638 /* Find colormap */ 1639#ifdef XFree86Server 1640 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1641#else 1642 if (attr.colormap) { 1643 cmap = attr.colormap; 1644 } 1645 else { 1646 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1647 /* this is weird, a window w/out a colormap!? */ 1648 /* OK, let's just allocate a new one and hope for the best */ 1649 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1650 } 1651#endif 1652 1653 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1654 if (!b) 1655 return NULL; 1656 1657 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1658 (XMesaDrawable) w, cmap )) { 1659 xmesa_free_buffer(b); 1660 return NULL; 1661 } 1662 1663#ifdef FX 1664 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1665 if (fxEnvVar) { 1666 if (fxEnvVar[0]!='d') { 1667 int attribs[100]; 1668 int numAttribs = 0; 1669 int hw; 1670 if (v->mesa_visual.depthBits > 0) { 1671 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1672 attribs[numAttribs++] = v->mesa_visual.depthBits; 1673 } 1674 if (v->mesa_visual.doubleBufferMode) { 1675 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1676 } 1677 if (v->mesa_visual.accumRedBits > 0) { 1678 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1679 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1680 } 1681 if (v->mesa_visual.stencilBits > 0) { 1682 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1683 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1684 } 1685 if (v->mesa_visual.alphaBits > 0) { 1686 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1687 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1688 } 1689 if (1) { 1690 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1691 attribs[numAttribs++] = (int) &(c->mesa); 1692 } 1693 attribs[numAttribs++] = FXMESA_NONE; 1694 1695 /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ 1696 hw = fxMesaSelectCurrentBoard(0); 1697 1698 /* if these fail, there's a new bug somewhere */ 1699 ASSERT(b->mesa_buffer.Width > 0); 1700 ASSERT(b->mesa_buffer.Height > 0); 1701 1702 if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) { 1703 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1704 b->mesa_buffer.Height, attribs); 1705 if ((v->undithered_pf!=PF_Index) && (b->backxrb->ximage)) { 1706 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1707 if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) { 1708 b->FXwindowHack = GL_TRUE; 1709 FX_grSstControl(GR_CONTROL_DEACTIVATE); 1710 } 1711 else { 1712 b->FXwindowHack = GL_FALSE; 1713 } 1714 } 1715 } 1716 else { 1717 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1718 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1719 GR_REFRESH_75Hz, attribs); 1720 else 1721 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1722 b->mesa_buffer.Height, attribs); 1723 b->FXisHackUsable = GL_FALSE; 1724 b->FXwindowHack = GL_FALSE; 1725 } 1726 /* 1727 fprintf(stderr, 1728 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1729 hw, b->mesa_buffer.Width, b->mesa_buffer.Height, 1730 b->FXisHackUsable, b->FXwindowHack); 1731 */ 1732 } 1733 } 1734 else { 1735 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1736 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1737 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1738 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1739 } 1740#endif 1741 1742 return b; 1743} 1744 1745 1746XMesaBuffer 1747XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1748{ 1749 return XMesaCreateWindowBuffer2( v, w, NULL ); 1750} 1751 1752 1753/** 1754 * Create a new XMesaBuffer from an X pixmap. 1755 * 1756 * \param v the XMesaVisual 1757 * \param p the pixmap 1758 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1759 * \c GLX_DIRECT_COLOR visual for the pixmap 1760 * \returns new XMesaBuffer or NULL if error 1761 */ 1762XMesaBuffer 1763XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1764{ 1765 int client = 0; 1766 XMesaBuffer b; 1767 1768 assert(v); 1769 1770 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1771 if (!b) 1772 return NULL; 1773 1774#ifdef XFree86Server 1775 client = CLIENT_ID(((XMesaDrawable)p)->id); 1776#endif 1777 1778 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1779 (XMesaDrawable) p, cmap)) { 1780 xmesa_free_buffer(b); 1781 return NULL; 1782 } 1783 1784 return b; 1785} 1786 1787 1788 1789XMesaBuffer 1790XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1791 unsigned int width, unsigned int height) 1792{ 1793#ifdef XFree86Server 1794 return 0; 1795#else 1796 int client = 0; 1797 XMesaWindow root; 1798 XMesaDrawable drawable; /* X Pixmap Drawable */ 1799 XMesaBuffer b; 1800 1801 /* allocate pixmap for front buffer */ 1802 root = RootWindow( v->display, v->visinfo->screen ); 1803 drawable = XCreatePixmap(v->display, root, width, height, 1804 v->visinfo->depth); 1805 if (!drawable) 1806 return NULL; 1807 1808 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1809 if (!b) 1810 return NULL; 1811 1812 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1813 drawable, cmap)) { 1814 xmesa_free_buffer(b); 1815 return NULL; 1816 } 1817 1818 return b; 1819#endif 1820} 1821 1822 1823 1824/* 1825 * Deallocate an XMesaBuffer structure and all related info. 1826 */ 1827void 1828XMesaDestroyBuffer(XMesaBuffer b) 1829{ 1830 xmesa_free_buffer(b); 1831} 1832 1833 1834/** 1835 * Query the current window size and update the corresponding GLframebuffer 1836 * and all attached renderbuffers. 1837 * Called when: 1838 * 1. the first time a buffer is bound to a context. 1839 * 2. from glViewport to poll for window size changes 1840 * 3. from the XMesaResizeBuffers() API function. 1841 */ 1842void 1843xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1844{ 1845 GLuint width, height; 1846 xmesa_get_window_size(xmctx->display, drawBuffer, &width, &height); 1847 if (drawBuffer->mesa_buffer.Width != width || 1848 drawBuffer->mesa_buffer.Height != height) { 1849 _mesa_resize_framebuffer(&(xmctx->mesa), 1850 &(drawBuffer->mesa_buffer), width, height); 1851 } 1852 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1853} 1854 1855 1856/* 1857 * Bind buffer b to context c and make c the current rendering context. 1858 */ 1859GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1860{ 1861 return XMesaMakeCurrent2( c, b, b ); 1862} 1863 1864 1865/* 1866 * Bind buffer b to context c and make c the current rendering context. 1867 */ 1868GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1869 XMesaBuffer readBuffer ) 1870{ 1871 if (c) { 1872 if (!drawBuffer || !readBuffer) 1873 return GL_FALSE; /* must specify buffers! */ 1874 1875#ifdef FX 1876 if (drawBuffer->FXctx) { 1877 fxMesaMakeCurrent(drawBuffer->FXctx); 1878 1879 c->xm_buffer = drawBuffer; 1880 1881 return GL_TRUE; 1882 } 1883#endif 1884 if (&(c->mesa) == _mesa_get_current_context() 1885 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1886 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1887 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1888 /* same context and buffer, do nothing */ 1889 return GL_TRUE; 1890 } 1891 1892 c->xm_buffer = drawBuffer; 1893 1894 /* Call this periodically to detect when the user has begun using 1895 * GL rendering from multiple threads. 1896 */ 1897 _glapi_check_multithread(); 1898 1899 xmesa_check_and_update_buffer_size(c, drawBuffer); 1900 if (readBuffer != drawBuffer) 1901 xmesa_check_and_update_buffer_size(c, readBuffer); 1902 1903 _mesa_make_current(&(c->mesa), 1904 &drawBuffer->mesa_buffer, 1905 &readBuffer->mesa_buffer); 1906 1907 if (c->xm_visual->mesa_visual.rgbMode) { 1908 /* 1909 * Must recompute and set these pixel values because colormap 1910 * can be different for different windows. 1911 */ 1912 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1913 c->clearcolor[0], 1914 c->clearcolor[1], 1915 c->clearcolor[2], 1916 c->clearcolor[3], 1917 c->xm_visual->undithered_pf); 1918 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1919 } 1920 1921 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1922 drawBuffer->wasCurrent = GL_TRUE; 1923 } 1924 else { 1925 /* Detach */ 1926 _mesa_make_current( NULL, NULL, NULL ); 1927 } 1928 return GL_TRUE; 1929} 1930 1931 1932/* 1933 * Unbind the context c from its buffer. 1934 */ 1935GLboolean XMesaUnbindContext( XMesaContext c ) 1936{ 1937 /* A no-op for XFree86 integration purposes */ 1938 return GL_TRUE; 1939} 1940 1941 1942XMesaContext XMesaGetCurrentContext( void ) 1943{ 1944 GET_CURRENT_CONTEXT(ctx); 1945 if (ctx) { 1946 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1947 return xmesa; 1948 } 1949 else { 1950 return 0; 1951 } 1952} 1953 1954 1955XMesaBuffer XMesaGetCurrentBuffer( void ) 1956{ 1957 GET_CURRENT_CONTEXT(ctx); 1958 if (ctx) { 1959 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1960 return xmbuf; 1961 } 1962 else { 1963 return 0; 1964 } 1965} 1966 1967 1968/* New in Mesa 3.1 */ 1969XMesaBuffer XMesaGetCurrentReadBuffer( void ) 1970{ 1971 GET_CURRENT_CONTEXT(ctx); 1972 if (ctx) { 1973 return XMESA_BUFFER(ctx->ReadBuffer); 1974 } 1975 else { 1976 return 0; 1977 } 1978} 1979 1980 1981GLboolean XMesaForceCurrent(XMesaContext c) 1982{ 1983 if (c) { 1984 if (&(c->mesa) != _mesa_get_current_context()) { 1985 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 1986 } 1987 } 1988 else { 1989 _mesa_make_current(NULL, NULL, NULL); 1990 } 1991 return GL_TRUE; 1992} 1993 1994 1995GLboolean XMesaLoseCurrent(XMesaContext c) 1996{ 1997 (void) c; 1998 _mesa_make_current(NULL, NULL, NULL); 1999 return GL_TRUE; 2000} 2001 2002 2003/* 2004 * Switch 3Dfx support hack between window and full-screen mode. 2005 */ 2006GLboolean XMesaSetFXmode( GLint mode ) 2007{ 2008#ifdef FX 2009 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2010 if (fx && fx[0] != 'd') { 2011 GET_CURRENT_CONTEXT(ctx); 2012 GrHwConfiguration hw; 2013 if (!FX_grSstQueryHardware(&hw)) { 2014 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2015 return GL_FALSE; 2016 } 2017 if (hw.num_sst < 1) { 2018 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2019 return GL_FALSE; 2020 } 2021 if (ctx) { 2022 /* [dBorca] Hack alert: 2023 * oh, this is sooo wrong: ctx above is 2024 * really an fxMesaContext, not an XMesaContext 2025 */ 2026 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 2027 if (mode == XMESA_FX_WINDOW) { 2028 if (xmbuf->FXisHackUsable) { 2029 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2030 xmbuf->FXwindowHack = GL_TRUE; 2031 return GL_TRUE; 2032 } 2033 } 2034 else if (mode == XMESA_FX_FULLSCREEN) { 2035 FX_grSstControl(GR_CONTROL_ACTIVATE); 2036 xmbuf->FXwindowHack = GL_FALSE; 2037 return GL_TRUE; 2038 } 2039 else { 2040 /* Error: Bad mode value */ 2041 } 2042 } 2043 } 2044 /*fprintf(stderr, "fallthrough\n");*/ 2045#else 2046 (void) mode; 2047#endif 2048 return GL_FALSE; 2049} 2050 2051 2052 2053#ifdef FX 2054/* 2055 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2056 */ 2057static void FXgetImage( XMesaBuffer b ) 2058{ 2059 GET_CURRENT_CONTEXT(ctx); 2060 static unsigned short pixbuf[MAX_WIDTH]; 2061 GLuint x, y; 2062 GLuint width, height; 2063 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2064 2065#ifdef XFree86Server 2066 x = b->frontxrb->pixmap->x; 2067 y = b->frontxrb->pixmap->y; 2068 width = b->frontxrb->pixmap->width; 2069 height = b->frontxrb->pixmap->height; 2070 depth = b->frontxrb->pixmap->depth; 2071#else 2072 xmesa_get_window_size(b->display, b, &width, &height); 2073 x = y = 0; 2074#endif 2075 if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) { 2076 b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width); 2077 b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height); 2078 if (b->mesa_buffer.Width & 1) 2079 b->mesa_buffer.Width--; /* prevent odd width */ 2080 } 2081 2082 /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */ 2083 /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */ 2084 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2085 /* Special case: 16bpp RGB */ 2086 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2087 0, b->FXctx->height - b->mesa_buffer.Height, /*pos*/ 2088 b->mesa_buffer.Width, b->mesa_buffer.Height, /* size */ 2089 b->mesa_buffer.Width * sizeof(GLushort), /* stride */ 2090 b->backxrb->ximage->data); /* dest buffer */ 2091 } 2092 else if (b->xm_visual->dithered_pf==PF_Dither 2093 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2094 /* Special case: 8bpp RGB */ 2095 for (y=0;y<b->mesa_buffer.Height;y++) { 2096 GLubyte *ptr = (GLubyte*) b->backxrb->ximage->data 2097 + b->backxrb->ximage->bytes_per_line * y; 2098 XDITHER_SETUP(y); 2099 2100 /* read row from 3Dfx frame buffer */ 2101 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2102 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2103 b->mesa_buffer.Width, 1, 2104 0, 2105 pixbuf ); 2106 2107 /* write to XImage back buffer */ 2108 for (x=0;x<b->mesa_buffer.Width;x++) { 2109 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2110 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2111 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2112 *ptr++ = XDITHER( x, r, g, b); 2113 } 2114 } 2115 } 2116 else { 2117 /* General case: slow! */ 2118 for (y=0;y<b->mesa_buffer.Height;y++) { 2119 /* read row from 3Dfx frame buffer */ 2120 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2121 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2122 b->mesa_buffer.Width, 1, 2123 0, 2124 pixbuf ); 2125 2126 /* write to XImage back buffer */ 2127 for (x=0;x<b->mesa_buffer.Width;x++) { 2128 XMesaPutPixel(b->backxrb->ximage,x,y, 2129 xmesa_color_to_pixel(ctx, 2130 (pixbuf[x] & 0xf800) >> 8, 2131 (pixbuf[x] & 0x07e0) >> 3, 2132 (pixbuf[x] & 0x001f) << 3, 2133 0xff, 2134 b->xm_visual->undithered_pf)); 2135 } 2136 } 2137 } 2138 /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */ 2139} 2140#endif 2141 2142 2143/* 2144 * Copy the back buffer to the front buffer. If there's no back buffer 2145 * this is a no-op. 2146 */ 2147void XMesaSwapBuffers( XMesaBuffer b ) 2148{ 2149 GET_CURRENT_CONTEXT(ctx); 2150 2151 if (!b->backxrb) { 2152 /* single buffered */ 2153 return; 2154 } 2155 2156 /* If we're swapping the buffer associated with the current context 2157 * we have to flush any pending rendering commands first. 2158 */ 2159 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2160 _mesa_notifySwapBuffers(ctx); 2161 2162 if (b->db_mode) { 2163#ifdef FX 2164 if (b->FXctx) { 2165 fxMesaSwapBuffers(); 2166 2167 if (b->FXwindowHack) 2168 FXgetImage(b); 2169 else 2170 return; 2171 } 2172#endif 2173 if (b->backxrb->ximage) { 2174 /* Copy Ximage from host's memory to server's window */ 2175#if defined(USE_XSHM) && !defined(XFree86Server) 2176 if (b->shm) { 2177 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2178 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2179 b->swapgc, 2180 b->backxrb->ximage, 0, 0, 2181 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2182 False ); 2183 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2184 } 2185 else 2186#endif 2187 { 2188 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2189 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2190 b->swapgc, 2191 b->backxrb->ximage, 0, 0, 2192 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2193 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2194 } 2195 } 2196 else { 2197 /* Copy pixmap to window on server */ 2198 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2199 XMesaCopyArea( b->xm_visual->display, 2200 b->backxrb->pixmap, /* source drawable */ 2201 b->frontxrb->drawable, /* dest. drawable */ 2202 b->swapgc, 2203 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2204 0, 0 /* dest region */ 2205 ); 2206 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2207 } 2208 } 2209#if !defined(XFree86Server) 2210 XSync( b->xm_visual->display, False ); 2211#endif 2212} 2213 2214 2215 2216/* 2217 * Copy sub-region of back buffer to front buffer 2218 */ 2219void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2220{ 2221 GET_CURRENT_CONTEXT(ctx); 2222 2223 /* If we're swapping the buffer associated with the current context 2224 * we have to flush any pending rendering commands first. 2225 */ 2226 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2227 _mesa_notifySwapBuffers(ctx); 2228 2229 if (!b->backxrb) { 2230 /* single buffered */ 2231 return; 2232 } 2233 2234 if (b->db_mode) { 2235 int yTop = b->mesa_buffer.Height - y - height; 2236#ifdef FX 2237 if (b->FXctx) { 2238 fxMesaSwapBuffers(); 2239 if (b->FXwindowHack) 2240 FXgetImage(b); 2241 else 2242 return; 2243 } 2244#endif 2245 if (b->backxrb->ximage) { 2246 /* Copy Ximage from host's memory to server's window */ 2247#if defined(USE_XSHM) && !defined(XFree86Server) 2248 if (b->shm) { 2249 /* XXX assuming width and height aren't too large! */ 2250 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2251 b->swapgc, 2252 b->backxrb->ximage, x, yTop, 2253 x, yTop, width, height, False ); 2254 /* wait for finished event??? */ 2255 } 2256 else 2257#endif 2258 { 2259 /* XXX assuming width and height aren't too large! */ 2260 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2261 b->swapgc, 2262 b->backxrb->ximage, x, yTop, 2263 x, yTop, width, height ); 2264 } 2265 } 2266 else { 2267 /* Copy pixmap to window on server */ 2268 XMesaCopyArea( b->xm_visual->display, 2269 b->backxrb->pixmap, /* source drawable */ 2270 b->frontxrb->drawable, /* dest. drawable */ 2271 b->swapgc, 2272 x, yTop, width, height, /* source region */ 2273 x, yTop /* dest region */ 2274 ); 2275 } 2276 } 2277} 2278 2279 2280/* 2281 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2282 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2283 * back buffer directly. 2284 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2285 * ximage - pointer to back buffer's XImage, or NULL 2286 * Return: GL_TRUE = context is double buffered 2287 * GL_FALSE = context is single buffered 2288 */ 2289#ifndef XFree86Server 2290GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2291 XMesaPixmap *pixmap, 2292 XMesaImage **ximage ) 2293{ 2294 if (b->db_mode) { 2295 if (pixmap) 2296 *pixmap = b->backxrb->pixmap; 2297 if (ximage) 2298 *ximage = b->backxrb->ximage; 2299 return GL_TRUE; 2300 } 2301 else { 2302 *pixmap = 0; 2303 *ximage = NULL; 2304 return GL_FALSE; 2305 } 2306} 2307#endif /* XFree86Server */ 2308 2309 2310/* 2311 * Return the depth buffer associated with an XMesaBuffer. 2312 * Input: b - the XMesa buffer handle 2313 * Output: width, height - size of buffer in pixels 2314 * bytesPerValue - bytes per depth value (2 or 4) 2315 * buffer - pointer to depth buffer values 2316 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2317 */ 2318GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2319 GLint *bytesPerValue, void **buffer ) 2320{ 2321 struct gl_renderbuffer *rb 2322 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2323 if (!rb || !rb->Data) { 2324 *width = 0; 2325 *height = 0; 2326 *bytesPerValue = 0; 2327 *buffer = 0; 2328 return GL_FALSE; 2329 } 2330 else { 2331 *width = b->mesa_buffer.Width; 2332 *height = b->mesa_buffer.Height; 2333 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2334 ? sizeof(GLushort) : sizeof(GLuint); 2335 *buffer = rb->Data; 2336 return GL_TRUE; 2337 } 2338} 2339 2340 2341void XMesaFlush( XMesaContext c ) 2342{ 2343 if (c && c->xm_visual) { 2344#ifdef XFree86Server 2345 /* NOT_NEEDED */ 2346#else 2347 XSync( c->xm_visual->display, False ); 2348#endif 2349 } 2350} 2351 2352 2353 2354const char *XMesaGetString( XMesaContext c, int name ) 2355{ 2356 (void) c; 2357 if (name==XMESA_VERSION) { 2358 return "5.0"; 2359 } 2360 else if (name==XMESA_EXTENSIONS) { 2361 return ""; 2362 } 2363 else { 2364 return NULL; 2365 } 2366} 2367 2368 2369 2370XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2371{ 2372 XMesaBuffer b; 2373 for (b=XMesaBufferList; b; b=b->Next) { 2374 if (b->frontxrb->drawable == d && b->display == dpy) { 2375 return b; 2376 } 2377 } 2378 return NULL; 2379} 2380 2381 2382/** 2383 * Free/destroy all XMesaBuffers associated with given display. 2384 */ 2385void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 2386{ 2387 XMesaBuffer b, next; 2388 for (b = XMesaBufferList; b; b = next) { 2389 next = b->Next; 2390 if (b->display == dpy) { 2391 xmesa_free_buffer(b); 2392 } 2393 } 2394} 2395 2396 2397/* 2398 * Look for XMesaBuffers whose X window has been destroyed. 2399 * Deallocate any such XMesaBuffers. 2400 */ 2401void XMesaGarbageCollect( void ) 2402{ 2403 XMesaBuffer b, next; 2404 for (b=XMesaBufferList; b; b=next) { 2405 next = b->Next; 2406 if (b->display && b->frontxrb->drawable && b->type == WINDOW) { 2407#ifdef XFree86Server 2408 /* NOT_NEEDED */ 2409#else 2410 XSync(b->display, False); 2411 if (!window_exists( b->display, b->frontxrb->drawable )) { 2412 /* found a dead window, free the ancillary info */ 2413 XMesaDestroyBuffer( b ); 2414 } 2415#endif 2416 } 2417 } 2418} 2419 2420 2421void XMesaReset( void ) 2422{ 2423 while (XMesaBufferList) 2424 XMesaDestroyBuffer(XMesaBufferList); 2425 2426 XMesaBufferList = NULL; 2427} 2428 2429 2430unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2431 GLfloat red, GLfloat green, 2432 GLfloat blue, GLfloat alpha ) 2433{ 2434 GLcontext *ctx = &xmesa->mesa; 2435 GLint r = (GLint) (red * 255.0F); 2436 GLint g = (GLint) (green * 255.0F); 2437 GLint b = (GLint) (blue * 255.0F); 2438 GLint a = (GLint) (alpha * 255.0F); 2439 2440 switch (xmesa->pixelformat) { 2441 case PF_Index: 2442 return 0; 2443 case PF_Truecolor: 2444 { 2445 unsigned long p; 2446 PACK_TRUECOLOR( p, r, g, b ); 2447 return p; 2448 } 2449 case PF_8A8B8G8R: 2450 return PACK_8A8B8G8R( r, g, b, a ); 2451 case PF_8A8R8G8B: 2452 return PACK_8A8R8G8B( r, g, b, a ); 2453 case PF_8R8G8B: 2454 return PACK_8R8G8B( r, g, b ); 2455 case PF_5R6G5B: 2456 return PACK_5R6G5B( r, g, b ); 2457 case PF_Dither: 2458 { 2459 DITHER_SETUP; 2460 return DITHER( x, y, r, g, b ); 2461 } 2462 case PF_1Bit: 2463 /* 382 = (3*255)/2 */ 2464 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2465 case PF_HPCR: 2466 return DITHER_HPCR(x, y, r, g, b); 2467 case PF_Lookup: 2468 { 2469 LOOKUP_SETUP; 2470 return LOOKUP( r, g, b ); 2471 } 2472 case PF_Grayscale: 2473 return GRAY_RGB( r, g, b ); 2474 case PF_Dither_5R6G5B: 2475 /* fall through */ 2476 case PF_Dither_True: 2477 { 2478 unsigned long p; 2479 PACK_TRUEDITHER(p, x, y, r, g, b); 2480 return p; 2481 } 2482 default: 2483 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2484 } 2485 return 0; 2486} 2487 2488 2489/* 2490 * This is typically called when the window size changes and we need 2491 * to reallocate the buffer's back/depth/stencil/accum buffers. 2492 */ 2493void 2494XMesaResizeBuffers( XMesaBuffer b ) 2495{ 2496 GET_CURRENT_CONTEXT(ctx); 2497 XMesaContext xmctx = XMESA_CONTEXT(ctx); 2498 xmesa_check_and_update_buffer_size(xmctx, b); 2499} 2500 2501