xm_api.c revision d60009bd6dba15d094b0d0bcb8180b7a2e1c1708
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/** 84 * Global X driver lock 85 */ 86_glthread_Mutex _xmesa_lock; 87 88 89 90/** 91 * Lookup tables for HPCR pixel format: 92 */ 93static short hpcr_rgbTbl[3][256] = { 94{ 95 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 96 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 97 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 98 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 99 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 100 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 101 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 102 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 103112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 104128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 105144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 106160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 107176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 108192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 109208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 110224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 111}, 112{ 113 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 114 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 115 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 116 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 117 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 118 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 119 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 120 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 121112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 122128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 123144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 124160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 125176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 126192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 127208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 128224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 129}, 130{ 131 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 132 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 133 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 134 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 135 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 136 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 137 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 138 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 139 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 140112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 141128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 142144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 143160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 144176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 145192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 146208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 147} 148}; 149 150 151 152/**********************************************************************/ 153/***** X Utility Functions *****/ 154/**********************************************************************/ 155 156 157/** 158 * Return the host's byte order as LSBFirst or MSBFirst ala X. 159 */ 160#ifndef XFree86Server 161static int host_byte_order( void ) 162{ 163 int i = 1; 164 char *cptr = (char *) &i; 165 return (*cptr==1) ? LSBFirst : MSBFirst; 166} 167#endif 168 169 170/** 171 * Check if the X Shared Memory extension is available. 172 * Return: 0 = not available 173 * 1 = shared XImage support available 174 * 2 = shared Pixmap support available also 175 */ 176static int check_for_xshm( XMesaDisplay *display ) 177{ 178#if defined(USE_XSHM) && !defined(XFree86Server) 179 int major, minor, ignore; 180 Bool pixmaps; 181 182 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 183 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 184 return (pixmaps==True) ? 2 : 1; 185 } 186 else { 187 return 0; 188 } 189 } 190 else { 191 return 0; 192 } 193#else 194 /* No XSHM support */ 195 return 0; 196#endif 197} 198 199 200/** 201 * Apply gamma correction to an intensity value in [0..max]. Return the 202 * new intensity value. 203 */ 204static GLint 205gamma_adjust( GLfloat gamma, GLint value, GLint max ) 206{ 207 if (gamma == 1.0) { 208 return value; 209 } 210 else { 211 double x = (double) value / (double) max; 212 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 213 } 214} 215 216 217 218/** 219 * Return the true number of bits per pixel for XImages. 220 * For example, if we request a 24-bit deep visual we may actually need/get 221 * 32bpp XImages. This function returns the appropriate bpp. 222 * Input: dpy - the X display 223 * visinfo - desribes the visual to be used for XImages 224 * Return: true number of bits per pixel for XImages 225 */ 226static int 227bits_per_pixel( XMesaVisual xmv ) 228{ 229#ifdef XFree86Server 230 const int depth = xmv->nplanes; 231 int i; 232 assert(depth > 0); 233 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 234 if (screenInfo.formats[i].depth == depth) 235 return screenInfo.formats[i].bitsPerPixel; 236 } 237 return depth; /* should never get here, but this should be safe */ 238#else 239 XMesaDisplay *dpy = xmv->display; 240 XMesaVisualInfo visinfo = xmv->visinfo; 241 XMesaImage *img; 242 int bitsPerPixel; 243 /* Create a temporary XImage */ 244 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 245 ZPixmap, 0, /*format, offset*/ 246 (char*) MALLOC(8), /*data*/ 247 1, 1, /*width, height*/ 248 32, /*bitmap_pad*/ 249 0 /*bytes_per_line*/ 250 ); 251 assert(img); 252 /* grab the bits/pixel value */ 253 bitsPerPixel = img->bits_per_pixel; 254 /* free the XImage */ 255 _mesa_free( img->data ); 256 img->data = NULL; 257 XMesaDestroyImage( img ); 258 return bitsPerPixel; 259#endif 260} 261 262 263 264/* 265 * Determine if a given X window ID is valid (window exists). 266 * Do this by calling XGetWindowAttributes() for the window and 267 * checking if we catch an X error. 268 * Input: dpy - the display 269 * win - the window to check for existance 270 * Return: GL_TRUE - window exists 271 * GL_FALSE - window doesn't exist 272 */ 273#ifndef XFree86Server 274static GLboolean WindowExistsFlag; 275 276static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 277{ 278 (void) dpy; 279 if (xerr->error_code == BadWindow) { 280 WindowExistsFlag = GL_FALSE; 281 } 282 return 0; 283} 284 285static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 286{ 287 XWindowAttributes wa; 288 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 289 WindowExistsFlag = GL_TRUE; 290 old_handler = XSetErrorHandler(window_exists_err_handler); 291 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 292 XSetErrorHandler(old_handler); 293 return WindowExistsFlag; 294} 295#endif 296 297 298 299/** 300 * Return the size of the window (or pixmap) that corresponds to the 301 * given XMesaBuffer. 302 * \param width returns width in pixels 303 * \param height returns height in pixels 304 */ 305void 306xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, 307 GLuint *width, GLuint *height) 308{ 309#ifdef XFree86Server 310 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH); 311 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT); 312#else 313 Window root; 314 Status stat; 315 int xpos, ypos; 316 unsigned int w, h, bw, depth; 317 318 _glthread_LOCK_MUTEX(_xmesa_lock); 319 XSync(b->xm_visual->display, 0); /* added for Chromium */ 320 stat = XGetGeometry(dpy, b->frontxrb->pixmap, &root, &xpos, &ypos, 321 &w, &h, &bw, &depth); 322 _glthread_UNLOCK_MUTEX(_xmesa_lock); 323 324 if (stat) { 325 *width = w; 326 *height = h; 327 } 328 else { 329 /* probably querying a window that's recently been destroyed */ 330 _mesa_warning(NULL, "XGetGeometry failed!\n"); 331 *width = *height = 1; 332 } 333#endif 334} 335 336 337 338/**********************************************************************/ 339/***** Linked list of XMesaBuffers *****/ 340/**********************************************************************/ 341 342XMesaBuffer XMesaBufferList = NULL; 343 344 345/** 346 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 347 * Note that XMesaBuffer is derived from GLframebuffer. 348 * The new XMesaBuffer will not have any size (Width=Height=0). 349 * 350 * \param d the corresponding X drawable (window or pixmap) 351 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 352 * \param vis the buffer's visual 353 * \param cmap the window's colormap, if known. 354 * \return new XMesaBuffer or NULL if any problem 355 */ 356static XMesaBuffer 357create_xmesa_buffer(XMesaDrawable d, BufferType type, 358 XMesaVisual vis, XMesaColormap cmap) 359{ 360 XMesaBuffer b; 361 362 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 363 364 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 365 if (!b) 366 return NULL; 367 368 b->display = vis->display; 369 b->xm_visual = vis; 370 b->type = type; 371 b->cmap = cmap; 372 373 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 374 b->mesa_buffer.Delete = xmesa_delete_framebuffer; 375 376 /* 377 * Front renderbuffer 378 */ 379 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE); 380 if (!b->frontxrb) { 381 _mesa_free(b); 382 return NULL; 383 } 384 b->frontxrb->Parent = b; 385 b->frontxrb->drawable = d; 386 b->frontxrb->pixmap = (XMesaPixmap) d; 387 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 388 &b->frontxrb->Base); 389 390 /* 391 * Back renderbuffer 392 */ 393 if (vis->mesa_visual.doubleBufferMode) { 394 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE); 395 if (!b->backxrb) { 396 /* XXX free front xrb too */ 397 _mesa_free(b); 398 return NULL; 399 } 400 b->backxrb->Parent = b; 401 /* determine back buffer implementation */ 402 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 403 404 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 405 &b->backxrb->Base); 406 } 407 408 /* 409 * Software alpha planes 410 */ 411 if (vis->mesa_visual.alphaBits > 0 412 && vis->undithered_pf != PF_8A8B8G8R 413 && vis->undithered_pf != PF_8A8R8G8B) { 414 /* Visual has alpha, but pixel format doesn't support it. 415 * We'll use an alpha renderbuffer wrapper. 416 */ 417 b->swAlpha = GL_TRUE; 418 } 419 else { 420 b->swAlpha = GL_FALSE; 421 } 422 423 /* 424 * Other renderbuffer (depth, stencil, etc) 425 */ 426 _mesa_add_soft_renderbuffers(&b->mesa_buffer, 427 GL_FALSE, /* color */ 428 vis->mesa_visual.haveDepthBuffer, 429 vis->mesa_visual.haveStencilBuffer, 430 vis->mesa_visual.haveAccumBuffer, 431 b->swAlpha, 432 vis->mesa_visual.numAuxBuffers > 0 ); 433 434 /* insert buffer into linked list */ 435 b->Next = XMesaBufferList; 436 XMesaBufferList = b; 437 438 return b; 439} 440 441 442/** 443 * Find an XMesaBuffer by matching X display and colormap but NOT matching 444 * the notThis buffer. 445 */ 446XMesaBuffer 447xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis) 448{ 449 XMesaBuffer b; 450 for (b=XMesaBufferList; b; b=b->Next) { 451 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 452 return b; 453 } 454 } 455 return NULL; 456} 457 458 459/** 460 * Remove buffer from linked list, delete if no longer referenced. 461 */ 462static void 463xmesa_free_buffer(XMesaBuffer buffer) 464{ 465 XMesaBuffer prev = NULL, b; 466 467 for (b = XMesaBufferList; b; b = b->Next) { 468 if (b == buffer) { 469 struct gl_framebuffer *fb = &buffer->mesa_buffer; 470 471 /* unlink buffer from list */ 472 if (prev) 473 prev->Next = buffer->Next; 474 else 475 XMesaBufferList = buffer->Next; 476 477 /* mark as delete pending */ 478 fb->DeletePending = GL_TRUE; 479 480 /* Since the X window for the XMesaBuffer is going away, we don't 481 * want to dereference this pointer in the future. 482 */ 483 b->frontxrb->drawable = 0; 484 485 /* Unreference. If count = zero we'll really delete the buffer */ 486 _mesa_unreference_framebuffer(&fb); 487 488 return; 489 } 490 /* continue search */ 491 prev = b; 492 } 493 /* buffer not found in XMesaBufferList */ 494 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 495} 496 497 498/** 499 * Copy X color table stuff from one XMesaBuffer to another. 500 */ 501static void 502copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 503{ 504 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 505 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 506 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 507 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 508 dst->num_alloced = src->num_alloced; 509 MEMCPY(dst->alloced_colors, src->alloced_colors, 510 sizeof(src->alloced_colors)); 511} 512 513 514 515/**********************************************************************/ 516/***** Misc Private Functions *****/ 517/**********************************************************************/ 518 519 520/** 521 * A replacement for XAllocColor. This function should never 522 * fail to allocate a color. When XAllocColor fails, we return 523 * the nearest matching color. If we have to allocate many colors 524 * this function isn't too efficient; the XQueryColors() could be 525 * done just once. 526 * Written by Michael Pichler, Brian Paul, Mark Kilgard 527 * Input: dpy - X display 528 * cmap - X colormap 529 * cmapSize - size of colormap 530 * In/Out: color - the XColor struct 531 * Output: exact - 1=exact color match, 0=closest match 532 * alloced - 1=XAlloc worked, 0=XAlloc failed 533 */ 534static void 535noFaultXAllocColor( int client, 536 XMesaDisplay *dpy, 537 XMesaColormap cmap, 538 int cmapSize, 539 XMesaColor *color, 540 int *exact, int *alloced ) 541{ 542#ifdef XFree86Server 543 Pixel *ppixIn; 544 xrgb *ctable; 545#else 546 /* we'll try to cache ctable for better remote display performance */ 547 static Display *prevDisplay = NULL; 548 static XMesaColormap prevCmap = 0; 549 static int prevCmapSize = 0; 550 static XMesaColor *ctable = NULL; 551#endif 552 XMesaColor subColor; 553 int i, bestmatch; 554 double mindist; /* 3*2^16^2 exceeds long int precision. */ 555 556 (void) client; 557 558 /* First try just using XAllocColor. */ 559#ifdef XFree86Server 560 if (AllocColor(cmap, 561 &color->red, &color->green, &color->blue, 562 &color->pixel, 563 client) == Success) 564#else 565 if (XAllocColor(dpy, cmap, color)) 566#endif 567 { 568 *exact = 1; 569 *alloced = 1; 570 return; 571 } 572 573 /* Alloc failed, search for closest match */ 574 575 /* Retrieve color table entries. */ 576 /* XXX alloca candidate. */ 577#ifdef XFree86Server 578 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 579 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 580 for (i = 0; i < cmapSize; i++) { 581 ppixIn[i] = i; 582 } 583 QueryColors(cmap, cmapSize, ppixIn, ctable); 584#else 585 if (prevDisplay != dpy || prevCmap != cmap 586 || prevCmapSize != cmapSize || !ctable) { 587 /* free previously cached color table */ 588 if (ctable) 589 _mesa_free(ctable); 590 /* Get the color table from X */ 591 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 592 assert(ctable); 593 for (i = 0; i < cmapSize; i++) { 594 ctable[i].pixel = i; 595 } 596 XQueryColors(dpy, cmap, ctable, cmapSize); 597 prevDisplay = dpy; 598 prevCmap = cmap; 599 prevCmapSize = cmapSize; 600 } 601#endif 602 603 /* Find best match. */ 604 bestmatch = -1; 605 mindist = 0.0; 606 for (i = 0; i < cmapSize; i++) { 607 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 608 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 609 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 610 double dist = dr * dr + dg * dg + db * db; 611 if (bestmatch < 0 || dist < mindist) { 612 bestmatch = i; 613 mindist = dist; 614 } 615 } 616 617 /* Return result. */ 618 subColor.red = ctable[bestmatch].red; 619 subColor.green = ctable[bestmatch].green; 620 subColor.blue = ctable[bestmatch].blue; 621 /* Try to allocate the closest match color. This should only 622 * fail if the cell is read/write. Otherwise, we're incrementing 623 * the cell's reference count. 624 */ 625#ifdef XFree86Server 626 if (AllocColor(cmap, 627 &subColor.red, &subColor.green, &subColor.blue, 628 &subColor.pixel, 629 client) == Success) { 630#else 631 if (XAllocColor(dpy, cmap, &subColor)) { 632#endif 633 *alloced = 1; 634 } 635 else { 636 /* do this to work around a problem reported by Frank Ortega */ 637 subColor.pixel = (unsigned long) bestmatch; 638 subColor.red = ctable[bestmatch].red; 639 subColor.green = ctable[bestmatch].green; 640 subColor.blue = ctable[bestmatch].blue; 641 subColor.flags = DoRed | DoGreen | DoBlue; 642 *alloced = 0; 643 } 644#ifdef XFree86Server 645 _mesa_free(ppixIn); 646 _mesa_free(ctable); 647#else 648 /* don't free table, save it for next time */ 649#endif 650 651 *color = subColor; 652 *exact = 0; 653} 654 655 656 657/** 658 * Do setup for PF_GRAYSCALE pixel format. 659 * Note that buffer may be NULL. 660 */ 661static GLboolean 662setup_grayscale(int client, XMesaVisual v, 663 XMesaBuffer buffer, XMesaColormap cmap) 664{ 665 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 666 return GL_FALSE; 667 } 668 669 if (buffer) { 670 XMesaBuffer prevBuffer; 671 672 if (!cmap) { 673 return GL_FALSE; 674 } 675 676 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 677 if (prevBuffer && 678 (buffer->xm_visual->mesa_visual.rgbMode == 679 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 680 /* Copy colormap stuff from previous XMesaBuffer which uses same 681 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 682 */ 683 copy_colortable_info(buffer, prevBuffer); 684 } 685 else { 686 /* Allocate 256 shades of gray */ 687 int gray; 688 int colorsfailed = 0; 689 for (gray=0;gray<256;gray++) { 690 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 691 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 692 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 693 int exact, alloced; 694 XMesaColor xcol; 695 xcol.red = (r << 8) | r; 696 xcol.green = (g << 8) | g; 697 xcol.blue = (b << 8) | b; 698 noFaultXAllocColor( client, v->display, 699 cmap, GET_COLORMAP_SIZE(v), 700 &xcol, &exact, &alloced ); 701 if (!exact) { 702 colorsfailed++; 703 } 704 if (alloced) { 705 assert(buffer->num_alloced<256); 706 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 707 buffer->num_alloced++; 708 } 709 710 /*OLD 711 assert(gray < 576); 712 buffer->color_table[gray*3+0] = xcol.pixel; 713 buffer->color_table[gray*3+1] = xcol.pixel; 714 buffer->color_table[gray*3+2] = xcol.pixel; 715 assert(xcol.pixel < 65536); 716 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 717 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 718 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 719 */ 720 buffer->color_table[gray] = xcol.pixel; 721 assert(xcol.pixel < 65536); 722 buffer->pixel_to_r[xcol.pixel] = gray; 723 buffer->pixel_to_g[xcol.pixel] = gray; 724 buffer->pixel_to_b[xcol.pixel] = gray; 725 } 726 727 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 728 _mesa_warning(NULL, 729 "Note: %d out of 256 needed colors do not match exactly.\n", 730 colorsfailed ); 731 } 732 } 733 } 734 735 v->dithered_pf = PF_Grayscale; 736 v->undithered_pf = PF_Grayscale; 737 return GL_TRUE; 738} 739 740 741 742/** 743 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 744 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 745 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 746 * color. While this function was originally designed just for 8-bit 747 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 748 * Dithering code contributed by Bob Mercier. 749 */ 750static GLboolean 751setup_dithered_color(int client, XMesaVisual v, 752 XMesaBuffer buffer, XMesaColormap cmap) 753{ 754 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 755 return GL_FALSE; 756 } 757 758 if (buffer) { 759 XMesaBuffer prevBuffer; 760 761 if (!cmap) { 762 return GL_FALSE; 763 } 764 765 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 766 if (prevBuffer && 767 (buffer->xm_visual->mesa_visual.rgbMode == 768 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 769 /* Copy colormap stuff from previous, matching XMesaBuffer. 770 * Do this to avoid time spent in noFaultXAllocColor. 771 */ 772 copy_colortable_info(buffer, prevBuffer); 773 } 774 else { 775 /* Allocate X colors and initialize color_table[], red_table[], etc */ 776 int r, g, b, i; 777 int colorsfailed = 0; 778 for (r = 0; r < DITH_R; r++) { 779 for (g = 0; g < DITH_G; g++) { 780 for (b = 0; b < DITH_B; b++) { 781 XMesaColor xcol; 782 int exact, alloced; 783 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 784 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 785 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 786 noFaultXAllocColor( client, v->display, 787 cmap, GET_COLORMAP_SIZE(v), 788 &xcol, &exact, &alloced ); 789 if (!exact) { 790 colorsfailed++; 791 } 792 if (alloced) { 793 assert(buffer->num_alloced<256); 794 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 795 buffer->num_alloced++; 796 } 797 i = DITH_MIX( r, g, b ); 798 assert(i < 576); 799 buffer->color_table[i] = xcol.pixel; 800 assert(xcol.pixel < 65536); 801 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 802 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 803 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 804 } 805 } 806 } 807 808 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 809 _mesa_warning(NULL, 810 "Note: %d out of %d needed colors do not match exactly.\n", 811 colorsfailed, DITH_R * DITH_G * DITH_B ); 812 } 813 } 814 } 815 816 v->dithered_pf = PF_Dither; 817 v->undithered_pf = PF_Lookup; 818 return GL_TRUE; 819} 820 821 822/** 823 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 824 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 825 * Special dithering tables have to be initialized. 826 */ 827static void 828setup_8bit_hpcr(XMesaVisual v) 829{ 830 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 831 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 832 * on the root window AND the colormap obtainable by XGetRGBColormaps 833 * for that atom must be set on the window. (see also tkInitWindow) 834 * If that colormap is not set, the output will look stripy. 835 */ 836 837 /* Setup color tables with gamma correction */ 838 int i; 839 double g; 840 841 g = 1.0 / v->RedGamma; 842 for (i=0; i<256; i++) { 843 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 844 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 845 } 846 847 g = 1.0 / v->GreenGamma; 848 for (i=0; i<256; i++) { 849 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 850 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 851 } 852 853 g = 1.0 / v->BlueGamma; 854 for (i=0; i<256; i++) { 855 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 856 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 857 } 858 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 859 v->dithered_pf = PF_HPCR; 860 861 /* which method should I use to clear */ 862 /* GL_FALSE: keep the ordinary method */ 863 /* GL_TRUE : clear with dither pattern */ 864 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 865 866 if (v->hpcr_clear_flag) { 867 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 868 DefaultRootWindow(v->display), 869 16, 2, 8); 870#ifndef XFree86Server 871 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 872 0, 0, 16, 2, AllPlanes, ZPixmap); 873#endif 874 } 875} 876 877 878/** 879 * Setup RGB rendering for a window with a True/DirectColor visual. 880 */ 881static void 882setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) 883{ 884 unsigned long rmask, gmask, bmask; 885 (void) buffer; 886 (void) cmap; 887 888 /* Compute red multiplier (mask) and bit shift */ 889 v->rshift = 0; 890 rmask = GET_REDMASK(v); 891 while ((rmask & 1)==0) { 892 v->rshift++; 893 rmask = rmask >> 1; 894 } 895 896 /* Compute green multiplier (mask) and bit shift */ 897 v->gshift = 0; 898 gmask = GET_GREENMASK(v); 899 while ((gmask & 1)==0) { 900 v->gshift++; 901 gmask = gmask >> 1; 902 } 903 904 /* Compute blue multiplier (mask) and bit shift */ 905 v->bshift = 0; 906 bmask = GET_BLUEMASK(v); 907 while ((bmask & 1)==0) { 908 v->bshift++; 909 bmask = bmask >> 1; 910 } 911 912 /* 913 * Compute component-to-pixel lookup tables and dithering kernel 914 */ 915 { 916 static GLubyte kernel[16] = { 917 0*16, 8*16, 2*16, 10*16, 918 12*16, 4*16, 14*16, 6*16, 919 3*16, 11*16, 1*16, 9*16, 920 15*16, 7*16, 13*16, 5*16, 921 }; 922 GLint rBits = _mesa_bitcount(rmask); 923 GLint gBits = _mesa_bitcount(gmask); 924 GLint bBits = _mesa_bitcount(bmask); 925 GLint maxBits; 926 GLuint i; 927 928 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 929 for (i=0; i<=rmask; i++) 930 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 931 for (i=0; i<=gmask; i++) 932 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 933 for (i=0; i<=bmask; i++) 934 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 935 936 /* convert RGB values from [0,255] to pixel components */ 937 938 for (i=0;i<256;i++) { 939 GLint r = gamma_adjust(v->RedGamma, i, 255); 940 GLint g = gamma_adjust(v->GreenGamma, i, 255); 941 GLint b = gamma_adjust(v->BlueGamma, i, 255); 942 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 943 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 944 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 945 } 946 /* overflow protection */ 947 for (i=256;i<512;i++) { 948 v->RtoPixel[i] = v->RtoPixel[255]; 949 v->GtoPixel[i] = v->GtoPixel[255]; 950 v->BtoPixel[i] = v->BtoPixel[255]; 951 } 952 953 /* setup dithering kernel */ 954 maxBits = rBits; 955 if (gBits > maxBits) maxBits = gBits; 956 if (bBits > maxBits) maxBits = bBits; 957 for (i=0;i<16;i++) { 958 v->Kernel[i] = kernel[i] >> maxBits; 959 } 960 961 v->undithered_pf = PF_Truecolor; 962 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 963 } 964 965 /* 966 * Now check for TrueColor visuals which we can optimize. 967 */ 968 if ( GET_REDMASK(v) ==0x0000ff 969 && GET_GREENMASK(v)==0x00ff00 970 && GET_BLUEMASK(v) ==0xff0000 971 && CHECK_BYTE_ORDER(v) 972 && v->BitsPerPixel==32 973 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 974 /* common 32 bpp config used on SGI, Sun */ 975 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ 976 } 977 else if (GET_REDMASK(v) == 0xff0000 978 && GET_GREENMASK(v)== 0x00ff00 979 && GET_BLUEMASK(v) == 0x0000ff 980 && CHECK_BYTE_ORDER(v) 981 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ 982 if (v->BitsPerPixel==32) { 983 /* if 32 bpp, and visual indicates 8 bpp alpha channel */ 984 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) 985 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ 986 else 987 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ 988 } 989 else if (v->BitsPerPixel == 24) { 990 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ 991 } 992 } 993 else if (GET_REDMASK(v) ==0xf800 994 && GET_GREENMASK(v)==0x07e0 995 && GET_BLUEMASK(v) ==0x001f 996 && CHECK_BYTE_ORDER(v) 997 && v->BitsPerPixel==16 998 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 999 /* 5-6-5 RGB */ 1000 v->undithered_pf = PF_5R6G5B; 1001 v->dithered_pf = PF_Dither_5R6G5B; 1002 } 1003 else if (GET_REDMASK(v) ==0xe0 1004 && GET_GREENMASK(v)==0x1c 1005 && GET_BLUEMASK(v) ==0x03 1006 && CHECK_FOR_HPCR(v)) { 1007 /* 8-bit HP color recovery */ 1008 setup_8bit_hpcr( v ); 1009 } 1010} 1011 1012 1013 1014/** 1015 * Setup RGB rendering for a window with a monochrome visual. 1016 */ 1017static void 1018setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1019{ 1020 (void) b; 1021 v->dithered_pf = v->undithered_pf = PF_1Bit; 1022 /* if black=1 then we must flip pixel values */ 1023 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1024} 1025 1026 1027 1028/** 1029 * When a context is bound for the first time, we can finally finish 1030 * initializing the context's visual and buffer information. 1031 * \param v the XMesaVisual to initialize 1032 * \param b the XMesaBuffer to initialize (may be NULL) 1033 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 1034 * \param window the window/pixmap we're rendering into 1035 * \param cmap the colormap associated with the window/pixmap 1036 * \return GL_TRUE=success, GL_FALSE=failure 1037 */ 1038static GLboolean 1039initialize_visual_and_buffer(int client, XMesaVisual v, XMesaBuffer b, 1040 GLboolean rgb_flag, XMesaDrawable window, 1041 XMesaColormap cmap) 1042{ 1043 ASSERT(!b || b->xm_visual == v); 1044 1045 /* Save true bits/pixel */ 1046 v->BitsPerPixel = bits_per_pixel(v); 1047 assert(v->BitsPerPixel > 0); 1048 1049 if (rgb_flag == GL_FALSE) { 1050 /* COLOR-INDEXED WINDOW: 1051 * Even if the visual is TrueColor or DirectColor we treat it as 1052 * being color indexed. This is weird but might be useful to someone. 1053 */ 1054 v->dithered_pf = v->undithered_pf = PF_Index; 1055 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1056 } 1057 else { 1058 /* RGB WINDOW: 1059 * We support RGB rendering into almost any kind of visual. 1060 */ 1061 const int xclass = v->mesa_visual.visualType; 1062 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1063 setup_truecolor( v, b, cmap ); 1064 } 1065 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { 1066 setup_monochrome( v, b ); 1067 } 1068 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { 1069 if (!setup_grayscale( client, v, b, cmap )) { 1070 return GL_FALSE; 1071 } 1072 } 1073 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) 1074 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1075 if (!setup_dithered_color( client, v, b, cmap )) { 1076 return GL_FALSE; 1077 } 1078 } 1079 else { 1080 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 1081 return GL_FALSE; 1082 } 1083 v->mesa_visual.indexBits = 0; 1084 1085 if (_mesa_getenv("MESA_NO_DITHER")) { 1086 v->dithered_pf = v->undithered_pf; 1087 } 1088 } 1089 1090 1091 /* 1092 * If MESA_INFO env var is set print out some debugging info 1093 * which can help Brian figure out what's going on when a user 1094 * reports bugs. 1095 */ 1096 if (_mesa_getenv("MESA_INFO")) { 1097 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1098 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1099 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1100 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1101 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1102 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1103 } 1104 1105 if (b && window) { 1106 /* Do window-specific initializations */ 1107 1108 /* these should have been set in create_xmesa_buffer */ 1109 ASSERT(b->frontxrb->drawable == window); 1110 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 1111 1112 /* Setup for single/double buffering */ 1113 if (v->mesa_visual.doubleBufferMode) { 1114 /* Double buffered */ 1115 b->shm = check_for_xshm( v->display ); 1116 } 1117 1118 /* X11 graphics contexts */ 1119#ifdef XFree86Server 1120 b->gc = CreateScratchGC(v->display, window->depth); 1121#else 1122 b->gc = XCreateGC( v->display, window, 0, NULL ); 1123#endif 1124 XMesaSetFunction( v->display, b->gc, GXcopy ); 1125 1126 /* cleargc - for glClear() */ 1127#ifdef XFree86Server 1128 b->cleargc = CreateScratchGC(v->display, window->depth); 1129#else 1130 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1131#endif 1132 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1133 1134 /* 1135 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1136 * Patch contributed by Michael Pichler May 15, 1995. 1137 */ 1138#ifdef XFree86Server 1139 b->swapgc = CreateScratchGC(v->display, window->depth); 1140 { 1141 CARD32 v[1]; 1142 v[0] = FALSE; 1143 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1144 } 1145#else 1146 { 1147 XGCValues gcvalues; 1148 gcvalues.graphics_exposures = False; 1149 b->swapgc = XCreateGC(v->display, window, 1150 GCGraphicsExposures, &gcvalues); 1151 } 1152#endif 1153 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1154 /* 1155 * Set fill style and tile pixmap once for all for HPCR stuff 1156 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1157 * Initialize whole stuff 1158 * Patch contributed by Jacques Leroy March 8, 1998. 1159 */ 1160 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { 1161 int i; 1162 for (i = 0; i < 16; i++) { 1163 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1164 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1165 } 1166 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1167 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1168 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1169 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1170 } 1171 1172 /* Initialize the row buffer XImage for use in write_color_span() */ 1173#ifdef XFree86Server 1174 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1175 (char *)MALLOC(MAX_WIDTH*4)); 1176#else 1177 b->rowimage = XCreateImage( v->display, 1178 v->visinfo->visual, 1179 v->visinfo->depth, 1180 ZPixmap, 0, /*format, offset*/ 1181 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1182 MAX_WIDTH, 1, /*width, height*/ 1183 32, /*bitmap_pad*/ 1184 0 /*bytes_per_line*/ ); 1185#endif 1186 if (!b->rowimage) 1187 return GL_FALSE; 1188 } 1189 1190 return GL_TRUE; 1191} 1192 1193 1194 1195/* 1196 * Convert an RGBA color to a pixel value. 1197 */ 1198unsigned long 1199xmesa_color_to_pixel(GLcontext *ctx, 1200 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1201 GLuint pixelFormat) 1202{ 1203 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1204 switch (pixelFormat) { 1205 case PF_Index: 1206 return 0; 1207 case PF_Truecolor: 1208 { 1209 unsigned long p; 1210 PACK_TRUECOLOR( p, r, g, b ); 1211 return p; 1212 } 1213 case PF_8A8B8G8R: 1214 return PACK_8A8B8G8R( r, g, b, a ); 1215 case PF_8A8R8G8B: 1216 return PACK_8A8R8G8B( r, g, b, a ); 1217 case PF_8R8G8B: 1218 /* fall through */ 1219 case PF_8R8G8B24: 1220 return PACK_8R8G8B( r, g, b ); 1221 case PF_5R6G5B: 1222 return PACK_5R6G5B( r, g, b ); 1223 case PF_Dither: 1224 { 1225 DITHER_SETUP; 1226 return DITHER( 1, 0, r, g, b ); 1227 } 1228 case PF_1Bit: 1229 /* 382 = (3*255)/2 */ 1230 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1231 case PF_HPCR: 1232 return DITHER_HPCR(1, 1, r, g, b); 1233 case PF_Lookup: 1234 { 1235 LOOKUP_SETUP; 1236 return LOOKUP( r, g, b ); 1237 } 1238 case PF_Grayscale: 1239 return GRAY_RGB( r, g, b ); 1240 case PF_Dither_True: 1241 /* fall through */ 1242 case PF_Dither_5R6G5B: 1243 { 1244 unsigned long p; 1245 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1246 return p; 1247 } 1248 default: 1249 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1250 } 1251 return 0; 1252} 1253 1254 1255#define NUM_VISUAL_TYPES 6 1256 1257/** 1258 * Convert an X visual type to a GLX visual type. 1259 * 1260 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1261 * to be converted. 1262 * \return If \c visualType is a valid X visual type, a GLX visual type will 1263 * be returned. Otherwise \c GLX_NONE will be returned. 1264 * 1265 * \note 1266 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1267 * DRI CVS tree. 1268 */ 1269static GLint 1270xmesa_convert_from_x_visual_type( int visualType ) 1271{ 1272 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1273 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1274 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1275 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1276 }; 1277 1278 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1279 ? glx_visual_types[ visualType ] : GLX_NONE; 1280} 1281 1282 1283/**********************************************************************/ 1284/***** Public Functions *****/ 1285/**********************************************************************/ 1286 1287 1288/* 1289 * Create a new X/Mesa visual. 1290 * Input: display - X11 display 1291 * visinfo - an XVisualInfo pointer 1292 * rgb_flag - GL_TRUE = RGB mode, 1293 * GL_FALSE = color index mode 1294 * alpha_flag - alpha buffer requested? 1295 * db_flag - GL_TRUE = double-buffered, 1296 * GL_FALSE = single buffered 1297 * stereo_flag - stereo visual? 1298 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1299 * GL_FALSE = use an off-screen pixmap for back buffer 1300 * depth_size - requested bits/depth values, or zero 1301 * stencil_size - requested bits/stencil values, or zero 1302 * accum_red_size - requested bits/red accum values, or zero 1303 * accum_green_size - requested bits/green accum values, or zero 1304 * accum_blue_size - requested bits/blue accum values, or zero 1305 * accum_alpha_size - requested bits/alpha accum values, or zero 1306 * num_samples - number of samples/pixel if multisampling, or zero 1307 * level - visual level, usually 0 1308 * visualCaveat - ala the GLX extension, usually GLX_NONE 1309 * Return; a new XMesaVisual or 0 if error. 1310 */ 1311PUBLIC 1312XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1313 XMesaVisualInfo visinfo, 1314 GLboolean rgb_flag, 1315 GLboolean alpha_flag, 1316 GLboolean db_flag, 1317 GLboolean stereo_flag, 1318 GLboolean ximage_flag, 1319 GLint depth_size, 1320 GLint stencil_size, 1321 GLint accum_red_size, 1322 GLint accum_green_size, 1323 GLint accum_blue_size, 1324 GLint accum_alpha_size, 1325 GLint num_samples, 1326 GLint level, 1327 GLint visualCaveat ) 1328{ 1329 char *gamma; 1330 XMesaVisual v; 1331 GLint red_bits, green_bits, blue_bits, alpha_bits; 1332 1333#ifndef XFree86Server 1334 /* For debugging only */ 1335 if (_mesa_getenv("MESA_XSYNC")) { 1336 /* This makes debugging X easier. 1337 * In your debugger, set a breakpoint on _XError to stop when an 1338 * X protocol error is generated. 1339 */ 1340 XSynchronize( display, 1 ); 1341 } 1342#endif 1343 1344 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1345 if (!v) { 1346 return NULL; 1347 } 1348 1349 v->display = display; 1350 1351 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 1352 * the struct but we may need some of the information contained in it 1353 * at a later time. 1354 */ 1355#ifndef XFree86Server 1356 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1357 if(!v->visinfo) { 1358 _mesa_free(v); 1359 return NULL; 1360 } 1361 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1362#endif 1363 1364 /* check for MESA_GAMMA environment variable */ 1365 gamma = _mesa_getenv("MESA_GAMMA"); 1366 if (gamma) { 1367 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1368 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1369 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1370 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1371 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1372 } 1373 else { 1374 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1375 } 1376 1377 v->ximage_flag = ximage_flag; 1378 1379#ifdef XFree86Server 1380 /* We could calculate these values by ourselves. nplanes is either the sum 1381 * of the red, green, and blue bits or the number index bits. 1382 * ColormapEntries is either (1U << index_bits) or 1383 * (1U << max(redBits, greenBits, blueBits)). 1384 */ 1385 assert(visinfo->nplanes > 0); 1386 v->nplanes = visinfo->nplanes; 1387 v->ColormapEntries = visinfo->ColormapEntries; 1388 1389 v->mesa_visual.redMask = visinfo->redMask; 1390 v->mesa_visual.greenMask = visinfo->greenMask; 1391 v->mesa_visual.blueMask = visinfo->blueMask; 1392 v->mesa_visual.visualID = visinfo->vid; 1393 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1394#else 1395 v->mesa_visual.redMask = visinfo->red_mask; 1396 v->mesa_visual.greenMask = visinfo->green_mask; 1397 v->mesa_visual.blueMask = visinfo->blue_mask; 1398 v->mesa_visual.visualID = visinfo->visualid; 1399 v->mesa_visual.screen = visinfo->screen; 1400#endif 1401 1402#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1403 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1404#else 1405 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1406#endif 1407 1408 v->mesa_visual.visualRating = visualCaveat; 1409 1410 if (alpha_flag) 1411 v->mesa_visual.alphaBits = 8; 1412 1413 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1414 1415 { 1416 const int xclass = v->mesa_visual.visualType; 1417 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1418 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1419 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1420 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1421 } 1422 else { 1423 /* this is an approximation */ 1424 int depth; 1425 depth = GET_VISUAL_DEPTH(v); 1426 red_bits = depth / 3; 1427 depth -= red_bits; 1428 green_bits = depth / 2; 1429 depth -= green_bits; 1430 blue_bits = depth; 1431 alpha_bits = 0; 1432 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1433 } 1434 alpha_bits = v->mesa_visual.alphaBits; 1435 } 1436 1437 _mesa_initialize_visual( &v->mesa_visual, 1438 rgb_flag, db_flag, stereo_flag, 1439 red_bits, green_bits, 1440 blue_bits, alpha_bits, 1441 v->mesa_visual.indexBits, 1442 depth_size, 1443 stencil_size, 1444 accum_red_size, accum_green_size, 1445 accum_blue_size, accum_alpha_size, 1446 0 ); 1447 1448 /* XXX minor hack */ 1449 v->mesa_visual.level = level; 1450 return v; 1451} 1452 1453 1454PUBLIC 1455void XMesaDestroyVisual( XMesaVisual v ) 1456{ 1457#ifndef XFree86Server 1458 _mesa_free(v->visinfo); 1459#endif 1460 _mesa_free(v); 1461} 1462 1463 1464 1465/** 1466 * Create a new XMesaContext. 1467 * \param v the XMesaVisual 1468 * \param share_list another XMesaContext with which to share display 1469 * lists or NULL if no sharing is wanted. 1470 * \return an XMesaContext or NULL if error. 1471 */ 1472PUBLIC 1473XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1474{ 1475 static GLboolean firstTime = GL_TRUE; 1476 XMesaContext c; 1477 GLcontext *mesaCtx; 1478 struct dd_function_table functions; 1479 TNLcontext *tnl; 1480 1481 if (firstTime) { 1482 _glthread_INIT_MUTEX(_xmesa_lock); 1483 firstTime = GL_FALSE; 1484 } 1485 1486 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1487 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1488 if (!c) 1489 return NULL; 1490 1491 mesaCtx = &(c->mesa); 1492 1493 /* initialize with default driver functions, then plug in XMesa funcs */ 1494 _mesa_init_driver_functions(&functions); 1495 xmesa_init_driver_functions(v, &functions); 1496 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1497 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1498 &functions, (void *) c)) { 1499 _mesa_free(c); 1500 return NULL; 1501 } 1502 1503 _mesa_enable_sw_extensions(mesaCtx); 1504 _mesa_enable_1_3_extensions(mesaCtx); 1505 _mesa_enable_1_4_extensions(mesaCtx); 1506 _mesa_enable_1_5_extensions(mesaCtx); 1507 _mesa_enable_2_0_extensions(mesaCtx); 1508#if ENABLE_EXT_texure_compression_s3tc 1509 if (c->Mesa_DXTn) { 1510 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1511 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1512 } 1513 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1514#endif 1515#if ENABLE_EXT_timer_query 1516 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1517#endif 1518 1519#ifdef XFree86Server 1520 /* If we're running in the X server, do bounds checking to prevent 1521 * segfaults and server crashes! 1522 */ 1523 mesaCtx->Const.CheckArrayBounds = GL_TRUE; 1524#endif 1525 1526 /* finish up xmesa context initializations */ 1527 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1528 c->xm_visual = v; 1529 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1530 c->display = v->display; 1531 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1532 1533 /* Initialize the software rasterizer and helper modules. 1534 */ 1535 if (!_swrast_CreateContext( mesaCtx ) || 1536 !_vbo_CreateContext( mesaCtx ) || 1537 !_tnl_CreateContext( mesaCtx ) || 1538 !_swsetup_CreateContext( mesaCtx )) { 1539 _mesa_free_context_data(&c->mesa); 1540 _mesa_free(c); 1541 return NULL; 1542 } 1543 1544 /* tnl setup */ 1545 tnl = TNL_CONTEXT(mesaCtx); 1546 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1547 /* swrast setup */ 1548 xmesa_register_swrast_functions( mesaCtx ); 1549 _swsetup_Wakeup(mesaCtx); 1550 1551 return c; 1552} 1553 1554 1555 1556PUBLIC 1557void XMesaDestroyContext( XMesaContext c ) 1558{ 1559 GLcontext *mesaCtx = &c->mesa; 1560#ifdef FX 1561 XMesaBuffer xmbuf = XMESA_BUFFER(mesaCtx->DrawBuffer); 1562 1563 if (xmbuf && xmbuf->FXctx) 1564 fxMesaDestroyContext(xmbuf->FXctx); 1565#endif 1566 _swsetup_DestroyContext( mesaCtx ); 1567 _swrast_DestroyContext( mesaCtx ); 1568 _tnl_DestroyContext( mesaCtx ); 1569 _vbo_DestroyContext( mesaCtx ); 1570 _mesa_free_context_data( mesaCtx ); 1571 _mesa_free( c ); 1572} 1573 1574 1575 1576/** 1577 * Private function for creating an XMesaBuffer which corresponds to an 1578 * X window or pixmap. 1579 * \param v the window's XMesaVisual 1580 * \param w the window we're wrapping 1581 * \param c context used to initialize the buffer if 3Dfx mode in use. 1582 * \return new XMesaBuffer or NULL if error 1583 */ 1584XMesaBuffer 1585XMesaCreateWindowBuffer2(XMesaVisual v, XMesaWindow w, XMesaContext c) 1586{ 1587#ifndef XFree86Server 1588 XWindowAttributes attr; 1589#endif 1590#ifdef FX 1591 char *fxEnvVar; 1592#endif 1593 int client = 0; 1594 XMesaBuffer b; 1595 XMesaColormap cmap; 1596 1597 assert(v); 1598 assert(w); 1599 (void) c; 1600 1601 /* Check that window depth matches visual depth */ 1602#ifdef XFree86Server 1603 client = CLIENT_ID(((XMesaDrawable)w)->id); 1604 1605 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1606 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1607 GET_VISUAL_DEPTH(v), ((XMesaDrawable) w)->depth); 1608 return NULL; 1609 } 1610#else 1611 XGetWindowAttributes( v->display, w, &attr ); 1612 1613 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1614 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1615 GET_VISUAL_DEPTH(v), attr.depth); 1616 return NULL; 1617 } 1618#endif 1619 1620 /* Find colormap */ 1621#ifdef XFree86Server 1622 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1623#else 1624 if (attr.colormap) { 1625 cmap = attr.colormap; 1626 } 1627 else { 1628 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1629 /* this is weird, a window w/out a colormap!? */ 1630 /* OK, let's just allocate a new one and hope for the best */ 1631 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1632 } 1633#endif 1634 1635 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1636 if (!b) 1637 return NULL; 1638 1639 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1640 (XMesaDrawable) w, cmap )) { 1641 xmesa_free_buffer(b); 1642 return NULL; 1643 } 1644 1645#ifdef FX 1646 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1647 if (fxEnvVar) { 1648 if (fxEnvVar[0]!='d') { 1649 int attribs[100]; 1650 int numAttribs = 0; 1651 int hw; 1652 if (v->mesa_visual.depthBits > 0) { 1653 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1654 attribs[numAttribs++] = v->mesa_visual.depthBits; 1655 } 1656 if (v->mesa_visual.doubleBufferMode) { 1657 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1658 } 1659 if (v->mesa_visual.accumRedBits > 0) { 1660 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1661 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1662 } 1663 if (v->mesa_visual.stencilBits > 0) { 1664 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1665 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1666 } 1667 if (v->mesa_visual.alphaBits > 0) { 1668 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1669 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1670 } 1671 if (1) { 1672 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1673 attribs[numAttribs++] = (int) &(c->mesa); 1674 } 1675 attribs[numAttribs++] = FXMESA_NONE; 1676 1677 /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ 1678 hw = fxMesaSelectCurrentBoard(0); 1679 1680 /* if these fail, there's a new bug somewhere */ 1681 ASSERT(b->mesa_buffer.Width > 0); 1682 ASSERT(b->mesa_buffer.Height > 0); 1683 1684 if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) { 1685 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1686 b->mesa_buffer.Height, attribs); 1687 if ((v->undithered_pf!=PF_Index) && (b->backxrb->ximage)) { 1688 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1689 if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) { 1690 b->FXwindowHack = GL_TRUE; 1691 FX_grSstControl(GR_CONTROL_DEACTIVATE); 1692 } 1693 else { 1694 b->FXwindowHack = GL_FALSE; 1695 } 1696 } 1697 } 1698 else { 1699 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1700 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1701 GR_REFRESH_75Hz, attribs); 1702 else 1703 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1704 b->mesa_buffer.Height, attribs); 1705 b->FXisHackUsable = GL_FALSE; 1706 b->FXwindowHack = GL_FALSE; 1707 } 1708 /* 1709 fprintf(stderr, 1710 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1711 hw, b->mesa_buffer.Width, b->mesa_buffer.Height, 1712 b->FXisHackUsable, b->FXwindowHack); 1713 */ 1714 } 1715 } 1716 else { 1717 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1718 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1719 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1720 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1721 } 1722#endif 1723 1724 return b; 1725} 1726 1727 1728PUBLIC XMesaBuffer 1729XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1730{ 1731 return XMesaCreateWindowBuffer2( v, w, NULL ); 1732} 1733 1734 1735/** 1736 * Create a new XMesaBuffer from an X pixmap. 1737 * 1738 * \param v the XMesaVisual 1739 * \param p the pixmap 1740 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1741 * \c GLX_DIRECT_COLOR visual for the pixmap 1742 * \returns new XMesaBuffer or NULL if error 1743 */ 1744PUBLIC XMesaBuffer 1745XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1746{ 1747 int client = 0; 1748 XMesaBuffer b; 1749 1750 assert(v); 1751 1752 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1753 if (!b) 1754 return NULL; 1755 1756#ifdef XFree86Server 1757 client = CLIENT_ID(((XMesaDrawable)p)->id); 1758#endif 1759 1760 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1761 (XMesaDrawable) p, cmap)) { 1762 xmesa_free_buffer(b); 1763 return NULL; 1764 } 1765 1766 return b; 1767} 1768 1769 1770 1771XMesaBuffer 1772XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1773 unsigned int width, unsigned int height) 1774{ 1775#ifdef XFree86Server 1776 return 0; 1777#else 1778 int client = 0; 1779 XMesaWindow root; 1780 XMesaDrawable drawable; /* X Pixmap Drawable */ 1781 XMesaBuffer b; 1782 1783 /* allocate pixmap for front buffer */ 1784 root = RootWindow( v->display, v->visinfo->screen ); 1785 drawable = XCreatePixmap(v->display, root, width, height, 1786 v->visinfo->depth); 1787 if (!drawable) 1788 return NULL; 1789 1790 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1791 if (!b) 1792 return NULL; 1793 1794 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1795 drawable, cmap)) { 1796 xmesa_free_buffer(b); 1797 return NULL; 1798 } 1799 1800 return b; 1801#endif 1802} 1803 1804 1805 1806/* 1807 * Deallocate an XMesaBuffer structure and all related info. 1808 */ 1809PUBLIC void 1810XMesaDestroyBuffer(XMesaBuffer b) 1811{ 1812 xmesa_free_buffer(b); 1813} 1814 1815 1816/** 1817 * Query the current window size and update the corresponding GLframebuffer 1818 * and all attached renderbuffers. 1819 * Called when: 1820 * 1. the first time a buffer is bound to a context. 1821 * 2. from glViewport to poll for window size changes 1822 * 3. from the XMesaResizeBuffers() API function. 1823 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1824 * when resizing a buffer when no rendering context is bound. 1825 */ 1826void 1827xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1828{ 1829 GLuint width, height; 1830 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1831 if (drawBuffer->mesa_buffer.Width != width || 1832 drawBuffer->mesa_buffer.Height != height) { 1833 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL; 1834 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1835 } 1836 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1837} 1838 1839 1840/* 1841 * Bind buffer b to context c and make c the current rendering context. 1842 */ 1843GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1844{ 1845 return XMesaMakeCurrent2( c, b, b ); 1846} 1847 1848 1849/* 1850 * Bind buffer b to context c and make c the current rendering context. 1851 */ 1852PUBLIC 1853GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1854 XMesaBuffer readBuffer ) 1855{ 1856 if (c) { 1857 if (!drawBuffer || !readBuffer) 1858 return GL_FALSE; /* must specify buffers! */ 1859 1860#ifdef FX 1861 if (drawBuffer->FXctx) { 1862 fxMesaMakeCurrent(drawBuffer->FXctx); 1863 1864 c->xm_buffer = drawBuffer; 1865 1866 return GL_TRUE; 1867 } 1868#endif 1869 if (&(c->mesa) == _mesa_get_current_context() 1870 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1871 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1872 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1873 /* same context and buffer, do nothing */ 1874 return GL_TRUE; 1875 } 1876 1877 c->xm_buffer = drawBuffer; 1878 1879 /* Call this periodically to detect when the user has begun using 1880 * GL rendering from multiple threads. 1881 */ 1882 _glapi_check_multithread(); 1883 1884 xmesa_check_and_update_buffer_size(c, drawBuffer); 1885 if (readBuffer != drawBuffer) 1886 xmesa_check_and_update_buffer_size(c, readBuffer); 1887 1888 _mesa_make_current(&(c->mesa), 1889 &drawBuffer->mesa_buffer, 1890 &readBuffer->mesa_buffer); 1891 1892 if (c->xm_visual->mesa_visual.rgbMode) { 1893 /* 1894 * Must recompute and set these pixel values because colormap 1895 * can be different for different windows. 1896 */ 1897 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1898 c->clearcolor[0], 1899 c->clearcolor[1], 1900 c->clearcolor[2], 1901 c->clearcolor[3], 1902 c->xm_visual->undithered_pf); 1903 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1904 } 1905 1906 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1907 drawBuffer->wasCurrent = GL_TRUE; 1908 } 1909 else { 1910 /* Detach */ 1911 _mesa_make_current( NULL, NULL, NULL ); 1912 } 1913 return GL_TRUE; 1914} 1915 1916 1917/* 1918 * Unbind the context c from its buffer. 1919 */ 1920GLboolean XMesaUnbindContext( XMesaContext c ) 1921{ 1922 /* A no-op for XFree86 integration purposes */ 1923 return GL_TRUE; 1924} 1925 1926 1927XMesaContext XMesaGetCurrentContext( void ) 1928{ 1929 GET_CURRENT_CONTEXT(ctx); 1930 if (ctx) { 1931 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1932 return xmesa; 1933 } 1934 else { 1935 return 0; 1936 } 1937} 1938 1939 1940XMesaBuffer XMesaGetCurrentBuffer( void ) 1941{ 1942 GET_CURRENT_CONTEXT(ctx); 1943 if (ctx) { 1944 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1945 return xmbuf; 1946 } 1947 else { 1948 return 0; 1949 } 1950} 1951 1952 1953/* New in Mesa 3.1 */ 1954XMesaBuffer XMesaGetCurrentReadBuffer( void ) 1955{ 1956 GET_CURRENT_CONTEXT(ctx); 1957 if (ctx) { 1958 return XMESA_BUFFER(ctx->ReadBuffer); 1959 } 1960 else { 1961 return 0; 1962 } 1963} 1964 1965 1966#ifdef XFree86Server 1967PUBLIC 1968GLboolean XMesaForceCurrent(XMesaContext c) 1969{ 1970 if (c) { 1971#ifdef XGLServer 1972 _glapi_set_dispatch(c->mesa.CurrentDispatch); 1973#endif 1974 1975 if (&(c->mesa) != _mesa_get_current_context()) { 1976 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 1977 } 1978 } 1979 else { 1980 _mesa_make_current(NULL, NULL, NULL); 1981 } 1982 return GL_TRUE; 1983} 1984 1985 1986PUBLIC 1987GLboolean XMesaLoseCurrent(XMesaContext c) 1988{ 1989 (void) c; 1990 _mesa_make_current(NULL, NULL, NULL); 1991 return GL_TRUE; 1992} 1993 1994 1995PUBLIC 1996GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask ) 1997{ 1998 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask); 1999 return GL_TRUE; 2000} 2001#endif /* XFree86Server */ 2002 2003 2004/* 2005 * Switch 3Dfx support hack between window and full-screen mode. 2006 */ 2007GLboolean XMesaSetFXmode( GLint mode ) 2008{ 2009#ifdef FX 2010 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2011 if (fx && fx[0] != 'd') { 2012 GET_CURRENT_CONTEXT(ctx); 2013 GrHwConfiguration hw; 2014 if (!FX_grSstQueryHardware(&hw)) { 2015 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2016 return GL_FALSE; 2017 } 2018 if (hw.num_sst < 1) { 2019 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2020 return GL_FALSE; 2021 } 2022 if (ctx) { 2023 /* [dBorca] Hack alert: 2024 * oh, this is sooo wrong: ctx above is 2025 * really an fxMesaContext, not an XMesaContext 2026 */ 2027 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 2028 if (mode == XMESA_FX_WINDOW) { 2029 if (xmbuf->FXisHackUsable) { 2030 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2031 xmbuf->FXwindowHack = GL_TRUE; 2032 return GL_TRUE; 2033 } 2034 } 2035 else if (mode == XMESA_FX_FULLSCREEN) { 2036 FX_grSstControl(GR_CONTROL_ACTIVATE); 2037 xmbuf->FXwindowHack = GL_FALSE; 2038 return GL_TRUE; 2039 } 2040 else { 2041 /* Error: Bad mode value */ 2042 } 2043 } 2044 } 2045 /*fprintf(stderr, "fallthrough\n");*/ 2046#else 2047 (void) mode; 2048#endif 2049 return GL_FALSE; 2050} 2051 2052 2053 2054#ifdef FX 2055/* 2056 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2057 */ 2058static void FXgetImage( XMesaBuffer b ) 2059{ 2060 GET_CURRENT_CONTEXT(ctx); 2061 static unsigned short pixbuf[MAX_WIDTH]; 2062 GLuint x, y; 2063 GLuint width, height; 2064 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2065 2066#ifdef XFree86Server 2067 x = b->frontxrb->pixmap->x; 2068 y = b->frontxrb->pixmap->y; 2069 width = b->frontxrb->pixmap->width; 2070 height = b->frontxrb->pixmap->height; 2071 depth = b->frontxrb->pixmap->depth; 2072#else 2073 xmesa_get_window_size(b->display, b, &width, &height); 2074 x = y = 0; 2075#endif 2076 if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) { 2077 b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width); 2078 b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height); 2079 if (b->mesa_buffer.Width & 1) 2080 b->mesa_buffer.Width--; /* prevent odd width */ 2081 } 2082 2083 /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */ 2084 /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */ 2085 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2086 /* Special case: 16bpp RGB */ 2087 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2088 0, b->FXctx->height - b->mesa_buffer.Height, /*pos*/ 2089 b->mesa_buffer.Width, b->mesa_buffer.Height, /* size */ 2090 b->mesa_buffer.Width * sizeof(GLushort), /* stride */ 2091 b->backxrb->ximage->data); /* dest buffer */ 2092 } 2093 else if (b->xm_visual->dithered_pf==PF_Dither 2094 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2095 /* Special case: 8bpp RGB */ 2096 for (y=0;y<b->mesa_buffer.Height;y++) { 2097 GLubyte *ptr = (GLubyte*) b->backxrb->ximage->data 2098 + b->backxrb->ximage->bytes_per_line * y; 2099 XDITHER_SETUP(y); 2100 2101 /* read row from 3Dfx frame buffer */ 2102 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2103 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2104 b->mesa_buffer.Width, 1, 2105 0, 2106 pixbuf ); 2107 2108 /* write to XImage back buffer */ 2109 for (x=0;x<b->mesa_buffer.Width;x++) { 2110 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2111 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2112 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2113 *ptr++ = XDITHER( x, r, g, b); 2114 } 2115 } 2116 } 2117 else { 2118 /* General case: slow! */ 2119 for (y=0;y<b->mesa_buffer.Height;y++) { 2120 /* read row from 3Dfx frame buffer */ 2121 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2122 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2123 b->mesa_buffer.Width, 1, 2124 0, 2125 pixbuf ); 2126 2127 /* write to XImage back buffer */ 2128 for (x=0;x<b->mesa_buffer.Width;x++) { 2129 XMesaPutPixel(b->backxrb->ximage,x,y, 2130 xmesa_color_to_pixel(ctx, 2131 (pixbuf[x] & 0xf800) >> 8, 2132 (pixbuf[x] & 0x07e0) >> 3, 2133 (pixbuf[x] & 0x001f) << 3, 2134 0xff, 2135 b->xm_visual->undithered_pf)); 2136 } 2137 } 2138 } 2139 /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */ 2140} 2141#endif 2142 2143 2144/* 2145 * Copy the back buffer to the front buffer. If there's no back buffer 2146 * this is a no-op. 2147 */ 2148PUBLIC 2149void XMesaSwapBuffers( XMesaBuffer b ) 2150{ 2151 GET_CURRENT_CONTEXT(ctx); 2152 2153 if (!b->backxrb) { 2154 /* single buffered */ 2155 return; 2156 } 2157 2158 /* If we're swapping the buffer associated with the current context 2159 * we have to flush any pending rendering commands first. 2160 */ 2161 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2162 _mesa_notifySwapBuffers(ctx); 2163 2164 if (b->db_mode) { 2165#ifdef FX 2166 if (b->FXctx) { 2167 fxMesaSwapBuffers(); 2168 2169 if (b->FXwindowHack) 2170 FXgetImage(b); 2171 else 2172 return; 2173 } 2174#endif 2175 if (b->backxrb->ximage) { 2176 /* Copy Ximage (back buf) from client memory to server window */ 2177#if defined(USE_XSHM) && !defined(XFree86Server) 2178 if (b->shm) { 2179 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2180 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2181 b->swapgc, 2182 b->backxrb->ximage, 0, 0, 2183 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2184 False ); 2185 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2186 } 2187 else 2188#endif 2189 { 2190 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2191 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2192 b->swapgc, 2193 b->backxrb->ximage, 0, 0, 2194 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2195 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2196 } 2197 } 2198 else if (b->backxrb->pixmap) { 2199 /* Copy pixmap (back buf) to window (front buf) on server */ 2200 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2201 XMesaCopyArea( b->xm_visual->display, 2202 b->backxrb->pixmap, /* source drawable */ 2203 b->frontxrb->drawable, /* dest. drawable */ 2204 b->swapgc, 2205 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2206 0, 0 /* dest region */ 2207 ); 2208 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2209 } 2210 2211 if (b->swAlpha) 2212 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); 2213 } 2214#if !defined(XFree86Server) 2215 XSync( b->xm_visual->display, False ); 2216#endif 2217} 2218 2219 2220 2221/* 2222 * Copy sub-region of back buffer to front buffer 2223 */ 2224void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2225{ 2226 GET_CURRENT_CONTEXT(ctx); 2227 2228 /* If we're swapping the buffer associated with the current context 2229 * we have to flush any pending rendering commands first. 2230 */ 2231 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2232 _mesa_notifySwapBuffers(ctx); 2233 2234 if (!b->backxrb) { 2235 /* single buffered */ 2236 return; 2237 } 2238 2239 if (b->db_mode) { 2240 int yTop = b->mesa_buffer.Height - y - height; 2241#ifdef FX 2242 if (b->FXctx) { 2243 fxMesaSwapBuffers(); 2244 if (b->FXwindowHack) 2245 FXgetImage(b); 2246 else 2247 return; 2248 } 2249#endif 2250 if (b->backxrb->ximage) { 2251 /* Copy Ximage from host's memory to server's window */ 2252#if defined(USE_XSHM) && !defined(XFree86Server) 2253 if (b->shm) { 2254 /* XXX assuming width and height aren't too large! */ 2255 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2256 b->swapgc, 2257 b->backxrb->ximage, x, yTop, 2258 x, yTop, width, height, False ); 2259 /* wait for finished event??? */ 2260 } 2261 else 2262#endif 2263 { 2264 /* XXX assuming width and height aren't too large! */ 2265 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2266 b->swapgc, 2267 b->backxrb->ximage, x, yTop, 2268 x, yTop, width, height ); 2269 } 2270 } 2271 else { 2272 /* Copy pixmap to window on server */ 2273 XMesaCopyArea( b->xm_visual->display, 2274 b->backxrb->pixmap, /* source drawable */ 2275 b->frontxrb->drawable, /* dest. drawable */ 2276 b->swapgc, 2277 x, yTop, width, height, /* source region */ 2278 x, yTop /* dest region */ 2279 ); 2280 } 2281 } 2282} 2283 2284 2285/* 2286 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2287 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2288 * back buffer directly. 2289 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2290 * ximage - pointer to back buffer's XImage, or NULL 2291 * Return: GL_TRUE = context is double buffered 2292 * GL_FALSE = context is single buffered 2293 */ 2294#ifndef XFree86Server 2295GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2296 XMesaPixmap *pixmap, 2297 XMesaImage **ximage ) 2298{ 2299 if (b->db_mode) { 2300 if (pixmap) 2301 *pixmap = b->backxrb->pixmap; 2302 if (ximage) 2303 *ximage = b->backxrb->ximage; 2304 return GL_TRUE; 2305 } 2306 else { 2307 *pixmap = 0; 2308 *ximage = NULL; 2309 return GL_FALSE; 2310 } 2311} 2312#endif /* XFree86Server */ 2313 2314 2315/* 2316 * Return the depth buffer associated with an XMesaBuffer. 2317 * Input: b - the XMesa buffer handle 2318 * Output: width, height - size of buffer in pixels 2319 * bytesPerValue - bytes per depth value (2 or 4) 2320 * buffer - pointer to depth buffer values 2321 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2322 */ 2323GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2324 GLint *bytesPerValue, void **buffer ) 2325{ 2326 struct gl_renderbuffer *rb 2327 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2328 if (!rb || !rb->Data) { 2329 *width = 0; 2330 *height = 0; 2331 *bytesPerValue = 0; 2332 *buffer = 0; 2333 return GL_FALSE; 2334 } 2335 else { 2336 *width = b->mesa_buffer.Width; 2337 *height = b->mesa_buffer.Height; 2338 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2339 ? sizeof(GLushort) : sizeof(GLuint); 2340 *buffer = rb->Data; 2341 return GL_TRUE; 2342 } 2343} 2344 2345 2346void XMesaFlush( XMesaContext c ) 2347{ 2348 if (c && c->xm_visual) { 2349#ifdef XFree86Server 2350 /* NOT_NEEDED */ 2351#else 2352 XSync( c->xm_visual->display, False ); 2353#endif 2354 } 2355} 2356 2357 2358 2359const char *XMesaGetString( XMesaContext c, int name ) 2360{ 2361 (void) c; 2362 if (name==XMESA_VERSION) { 2363 return "5.0"; 2364 } 2365 else if (name==XMESA_EXTENSIONS) { 2366 return ""; 2367 } 2368 else { 2369 return NULL; 2370 } 2371} 2372 2373 2374 2375XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2376{ 2377 XMesaBuffer b; 2378 for (b=XMesaBufferList; b; b=b->Next) { 2379 if (b->frontxrb->drawable == d && b->display == dpy) { 2380 return b; 2381 } 2382 } 2383 return NULL; 2384} 2385 2386 2387/** 2388 * Free/destroy all XMesaBuffers associated with given display. 2389 */ 2390void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 2391{ 2392 XMesaBuffer b, next; 2393 for (b = XMesaBufferList; b; b = next) { 2394 next = b->Next; 2395 if (b->display == dpy) { 2396 xmesa_free_buffer(b); 2397 } 2398 } 2399} 2400 2401 2402/* 2403 * Look for XMesaBuffers whose X window has been destroyed. 2404 * Deallocate any such XMesaBuffers. 2405 */ 2406void XMesaGarbageCollect( void ) 2407{ 2408 XMesaBuffer b, next; 2409 for (b=XMesaBufferList; b; b=next) { 2410 next = b->Next; 2411 if (b->display && b->frontxrb->drawable && b->type == WINDOW) { 2412#ifdef XFree86Server 2413 /* NOT_NEEDED */ 2414#else 2415 XSync(b->display, False); 2416 if (!window_exists( b->display, b->frontxrb->drawable )) { 2417 /* found a dead window, free the ancillary info */ 2418 XMesaDestroyBuffer( b ); 2419 } 2420#endif 2421 } 2422 } 2423} 2424 2425 2426unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2427 GLfloat red, GLfloat green, 2428 GLfloat blue, GLfloat alpha ) 2429{ 2430 GLcontext *ctx = &xmesa->mesa; 2431 GLint r = (GLint) (red * 255.0F); 2432 GLint g = (GLint) (green * 255.0F); 2433 GLint b = (GLint) (blue * 255.0F); 2434 GLint a = (GLint) (alpha * 255.0F); 2435 2436 switch (xmesa->pixelformat) { 2437 case PF_Index: 2438 return 0; 2439 case PF_Truecolor: 2440 { 2441 unsigned long p; 2442 PACK_TRUECOLOR( p, r, g, b ); 2443 return p; 2444 } 2445 case PF_8A8B8G8R: 2446 return PACK_8A8B8G8R( r, g, b, a ); 2447 case PF_8A8R8G8B: 2448 return PACK_8A8R8G8B( r, g, b, a ); 2449 case PF_8R8G8B: 2450 return PACK_8R8G8B( r, g, b ); 2451 case PF_5R6G5B: 2452 return PACK_5R6G5B( r, g, b ); 2453 case PF_Dither: 2454 { 2455 DITHER_SETUP; 2456 return DITHER( x, y, r, g, b ); 2457 } 2458 case PF_1Bit: 2459 /* 382 = (3*255)/2 */ 2460 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2461 case PF_HPCR: 2462 return DITHER_HPCR(x, y, r, g, b); 2463 case PF_Lookup: 2464 { 2465 LOOKUP_SETUP; 2466 return LOOKUP( r, g, b ); 2467 } 2468 case PF_Grayscale: 2469 return GRAY_RGB( r, g, b ); 2470 case PF_Dither_5R6G5B: 2471 /* fall through */ 2472 case PF_Dither_True: 2473 { 2474 unsigned long p; 2475 PACK_TRUEDITHER(p, x, y, r, g, b); 2476 return p; 2477 } 2478 default: 2479 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2480 } 2481 return 0; 2482} 2483 2484 2485/* 2486 * This is typically called when the window size changes and we need 2487 * to reallocate the buffer's back/depth/stencil/accum buffers. 2488 */ 2489PUBLIC void 2490XMesaResizeBuffers( XMesaBuffer b ) 2491{ 2492 GET_CURRENT_CONTEXT(ctx); 2493 XMesaContext xmctx = XMESA_CONTEXT(ctx); 2494 if (!xmctx) 2495 return; 2496 xmesa_check_and_update_buffer_size(xmctx, b); 2497} 2498 2499