xm_api.c revision 7439a36785b6a2783e80a40a96c09db8f56dc2bc
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 && sizeof(GLuint)==4 974 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 975 /* common 32 bpp config used on SGI, Sun */ 976 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 977 } 978 else if (GET_REDMASK(v) ==0xff0000 979 && GET_GREENMASK(v)==0x00ff00 980 && GET_BLUEMASK(v) ==0x0000ff 981 && CHECK_BYTE_ORDER(v) 982 && v->BitsPerPixel==32 983 && sizeof(GLuint)==4 984 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 985 /* common 32 bpp config used on Linux, HP, IBM */ 986 if (GET_VISUAL_DEPTH(v)==32) 987 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; 988 else 989 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 990 } 991 else if (GET_REDMASK(v) ==0xff0000 992 && GET_GREENMASK(v)==0x00ff00 993 && GET_BLUEMASK(v) ==0x0000ff 994 && CHECK_BYTE_ORDER(v) 995 && v->BitsPerPixel==24 996 && sizeof(GLuint)==4 997 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 998 /* common packed 24 bpp config used on Linux */ 999 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1000 } 1001 else if (GET_REDMASK(v) ==0xf800 1002 && GET_GREENMASK(v)==0x07e0 1003 && GET_BLUEMASK(v) ==0x001f 1004 && CHECK_BYTE_ORDER(v) 1005 && v->BitsPerPixel==16 1006 && sizeof(GLushort)==2 1007 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1008 /* 5-6-5 color weight on common PC VGA boards */ 1009 v->undithered_pf = PF_5R6G5B; 1010 v->dithered_pf = PF_Dither_5R6G5B; 1011 } 1012 else if (GET_REDMASK(v) ==0xe0 1013 && GET_GREENMASK(v)==0x1c 1014 && GET_BLUEMASK(v) ==0x03 1015 && CHECK_FOR_HPCR(v)) { 1016 setup_8bit_hpcr( v ); 1017 } 1018} 1019 1020 1021 1022/** 1023 * Setup RGB rendering for a window with a monochrome visual. 1024 */ 1025static void 1026setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1027{ 1028 (void) b; 1029 v->dithered_pf = v->undithered_pf = PF_1Bit; 1030 /* if black=1 then we must flip pixel values */ 1031 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1032} 1033 1034 1035 1036/** 1037 * When a context is bound for the first time, we can finally finish 1038 * initializing the context's visual and buffer information. 1039 * \param v the XMesaVisual to initialize 1040 * \param b the XMesaBuffer to initialize (may be NULL) 1041 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 1042 * \param window the window/pixmap we're rendering into 1043 * \param cmap the colormap associated with the window/pixmap 1044 * \return GL_TRUE=success, GL_FALSE=failure 1045 */ 1046static GLboolean 1047initialize_visual_and_buffer(int client, XMesaVisual v, XMesaBuffer b, 1048 GLboolean rgb_flag, XMesaDrawable window, 1049 XMesaColormap cmap) 1050{ 1051 ASSERT(!b || b->xm_visual == v); 1052 1053 /* Save true bits/pixel */ 1054 v->BitsPerPixel = bits_per_pixel(v); 1055 assert(v->BitsPerPixel > 0); 1056 1057 if (rgb_flag == GL_FALSE) { 1058 /* COLOR-INDEXED WINDOW: 1059 * Even if the visual is TrueColor or DirectColor we treat it as 1060 * being color indexed. This is weird but might be useful to someone. 1061 */ 1062 v->dithered_pf = v->undithered_pf = PF_Index; 1063 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1064 } 1065 else { 1066 /* RGB WINDOW: 1067 * We support RGB rendering into almost any kind of visual. 1068 */ 1069 const int xclass = v->mesa_visual.visualType; 1070 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1071 setup_truecolor( v, b, cmap ); 1072 } 1073 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { 1074 setup_monochrome( v, b ); 1075 } 1076 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { 1077 if (!setup_grayscale( client, v, b, cmap )) { 1078 return GL_FALSE; 1079 } 1080 } 1081 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) 1082 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1083 if (!setup_dithered_color( client, v, b, cmap )) { 1084 return GL_FALSE; 1085 } 1086 } 1087 else { 1088 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 1089 return GL_FALSE; 1090 } 1091 v->mesa_visual.indexBits = 0; 1092 1093 if (_mesa_getenv("MESA_NO_DITHER")) { 1094 v->dithered_pf = v->undithered_pf; 1095 } 1096 } 1097 1098 1099 /* 1100 * If MESA_INFO env var is set print out some debugging info 1101 * which can help Brian figure out what's going on when a user 1102 * reports bugs. 1103 */ 1104 if (_mesa_getenv("MESA_INFO")) { 1105 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1106 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1107 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1108 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1109 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1110 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1111 } 1112 1113 if (b && window) { 1114 /* Do window-specific initializations */ 1115 1116 /* these should have been set in create_xmesa_buffer */ 1117 ASSERT(b->frontxrb->drawable == window); 1118 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 1119 1120 /* Setup for single/double buffering */ 1121 if (v->mesa_visual.doubleBufferMode) { 1122 /* Double buffered */ 1123 b->shm = check_for_xshm( v->display ); 1124 } 1125 1126 /* X11 graphics contexts */ 1127#ifdef XFree86Server 1128 b->gc = CreateScratchGC(v->display, window->depth); 1129#else 1130 b->gc = XCreateGC( v->display, window, 0, NULL ); 1131#endif 1132 XMesaSetFunction( v->display, b->gc, GXcopy ); 1133 1134 /* cleargc - for glClear() */ 1135#ifdef XFree86Server 1136 b->cleargc = CreateScratchGC(v->display, window->depth); 1137#else 1138 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1139#endif 1140 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1141 1142 /* 1143 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1144 * Patch contributed by Michael Pichler May 15, 1995. 1145 */ 1146#ifdef XFree86Server 1147 b->swapgc = CreateScratchGC(v->display, window->depth); 1148 { 1149 CARD32 v[1]; 1150 v[0] = FALSE; 1151 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1152 } 1153#else 1154 { 1155 XGCValues gcvalues; 1156 gcvalues.graphics_exposures = False; 1157 b->swapgc = XCreateGC(v->display, window, 1158 GCGraphicsExposures, &gcvalues); 1159 } 1160#endif 1161 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1162 /* 1163 * Set fill style and tile pixmap once for all for HPCR stuff 1164 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1165 * Initialize whole stuff 1166 * Patch contributed by Jacques Leroy March 8, 1998. 1167 */ 1168 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { 1169 int i; 1170 for (i = 0; i < 16; i++) { 1171 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1172 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1173 } 1174 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1175 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1176 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1177 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1178 } 1179 1180 /* Initialize the row buffer XImage for use in write_color_span() */ 1181#ifdef XFree86Server 1182 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1183 (char *)MALLOC(MAX_WIDTH*4)); 1184#else 1185 b->rowimage = XCreateImage( v->display, 1186 v->visinfo->visual, 1187 v->visinfo->depth, 1188 ZPixmap, 0, /*format, offset*/ 1189 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1190 MAX_WIDTH, 1, /*width, height*/ 1191 32, /*bitmap_pad*/ 1192 0 /*bytes_per_line*/ ); 1193#endif 1194 if (!b->rowimage) 1195 return GL_FALSE; 1196 } 1197 1198 return GL_TRUE; 1199} 1200 1201 1202 1203/* 1204 * Convert an RGBA color to a pixel value. 1205 */ 1206unsigned long 1207xmesa_color_to_pixel(GLcontext *ctx, 1208 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1209 GLuint pixelFormat) 1210{ 1211 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1212 switch (pixelFormat) { 1213 case PF_Index: 1214 return 0; 1215 case PF_Truecolor: 1216 { 1217 unsigned long p; 1218 PACK_TRUECOLOR( p, r, g, b ); 1219 return p; 1220 } 1221 case PF_8A8B8G8R: 1222 return PACK_8A8B8G8R( r, g, b, a ); 1223 case PF_8A8R8G8B: 1224 return PACK_8A8R8G8B( r, g, b, a ); 1225 case PF_8R8G8B: 1226 /* fall through */ 1227 case PF_8R8G8B24: 1228 return PACK_8R8G8B( r, g, b ); 1229 case PF_5R6G5B: 1230 return PACK_5R6G5B( r, g, b ); 1231 case PF_Dither: 1232 { 1233 DITHER_SETUP; 1234 return DITHER( 1, 0, r, g, b ); 1235 } 1236 case PF_1Bit: 1237 /* 382 = (3*255)/2 */ 1238 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1239 case PF_HPCR: 1240 return DITHER_HPCR(1, 1, r, g, b); 1241 case PF_Lookup: 1242 { 1243 LOOKUP_SETUP; 1244 return LOOKUP( r, g, b ); 1245 } 1246 case PF_Grayscale: 1247 return GRAY_RGB( r, g, b ); 1248 case PF_Dither_True: 1249 /* fall through */ 1250 case PF_Dither_5R6G5B: 1251 { 1252 unsigned long p; 1253 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1254 return p; 1255 } 1256 default: 1257 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1258 } 1259 return 0; 1260} 1261 1262 1263#define NUM_VISUAL_TYPES 6 1264 1265/** 1266 * Convert an X visual type to a GLX visual type. 1267 * 1268 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1269 * to be converted. 1270 * \return If \c visualType is a valid X visual type, a GLX visual type will 1271 * be returned. Otherwise \c GLX_NONE will be returned. 1272 * 1273 * \note 1274 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1275 * DRI CVS tree. 1276 */ 1277static GLint 1278xmesa_convert_from_x_visual_type( int visualType ) 1279{ 1280 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1281 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1282 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1283 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1284 }; 1285 1286 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1287 ? glx_visual_types[ visualType ] : GLX_NONE; 1288} 1289 1290 1291/**********************************************************************/ 1292/***** Public Functions *****/ 1293/**********************************************************************/ 1294 1295 1296/* 1297 * Create a new X/Mesa visual. 1298 * Input: display - X11 display 1299 * visinfo - an XVisualInfo pointer 1300 * rgb_flag - GL_TRUE = RGB mode, 1301 * GL_FALSE = color index mode 1302 * alpha_flag - alpha buffer requested? 1303 * db_flag - GL_TRUE = double-buffered, 1304 * GL_FALSE = single buffered 1305 * stereo_flag - stereo visual? 1306 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1307 * GL_FALSE = use an off-screen pixmap for back buffer 1308 * depth_size - requested bits/depth values, or zero 1309 * stencil_size - requested bits/stencil values, or zero 1310 * accum_red_size - requested bits/red accum values, or zero 1311 * accum_green_size - requested bits/green accum values, or zero 1312 * accum_blue_size - requested bits/blue accum values, or zero 1313 * accum_alpha_size - requested bits/alpha accum values, or zero 1314 * num_samples - number of samples/pixel if multisampling, or zero 1315 * level - visual level, usually 0 1316 * visualCaveat - ala the GLX extension, usually GLX_NONE 1317 * Return; a new XMesaVisual or 0 if error. 1318 */ 1319XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1320 XMesaVisualInfo visinfo, 1321 GLboolean rgb_flag, 1322 GLboolean alpha_flag, 1323 GLboolean db_flag, 1324 GLboolean stereo_flag, 1325 GLboolean ximage_flag, 1326 GLint depth_size, 1327 GLint stencil_size, 1328 GLint accum_red_size, 1329 GLint accum_green_size, 1330 GLint accum_blue_size, 1331 GLint accum_alpha_size, 1332 GLint num_samples, 1333 GLint level, 1334 GLint visualCaveat ) 1335{ 1336 char *gamma; 1337 XMesaVisual v; 1338 GLint red_bits, green_bits, blue_bits, alpha_bits; 1339 1340#ifndef XFree86Server 1341 /* For debugging only */ 1342 if (_mesa_getenv("MESA_XSYNC")) { 1343 /* This makes debugging X easier. 1344 * In your debugger, set a breakpoint on _XError to stop when an 1345 * X protocol error is generated. 1346 */ 1347 XSynchronize( display, 1 ); 1348 } 1349#endif 1350 1351 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1352 if (!v) { 1353 return NULL; 1354 } 1355 1356 v->display = display; 1357 1358 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 1359 * the struct but we may need some of the information contained in it 1360 * at a later time. 1361 */ 1362#ifndef XFree86Server 1363 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1364 if(!v->visinfo) { 1365 _mesa_free(v); 1366 return NULL; 1367 } 1368 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1369#endif 1370 1371 /* check for MESA_GAMMA environment variable */ 1372 gamma = _mesa_getenv("MESA_GAMMA"); 1373 if (gamma) { 1374 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1375 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1376 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1377 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1378 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1379 } 1380 else { 1381 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1382 } 1383 1384 v->ximage_flag = ximage_flag; 1385 1386#ifdef XFree86Server 1387 /* We could calculate these values by ourselves. nplanes is either the sum 1388 * of the red, green, and blue bits or the number index bits. 1389 * ColormapEntries is either (1U << index_bits) or 1390 * (1U << max(redBits, greenBits, blueBits)). 1391 */ 1392 assert(visinfo->nplanes > 0); 1393 v->nplanes = visinfo->nplanes; 1394 v->ColormapEntries = visinfo->ColormapEntries; 1395 1396 v->mesa_visual.redMask = visinfo->redMask; 1397 v->mesa_visual.greenMask = visinfo->greenMask; 1398 v->mesa_visual.blueMask = visinfo->blueMask; 1399 v->mesa_visual.visualID = visinfo->vid; 1400 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1401#else 1402 v->mesa_visual.redMask = visinfo->red_mask; 1403 v->mesa_visual.greenMask = visinfo->green_mask; 1404 v->mesa_visual.blueMask = visinfo->blue_mask; 1405 v->mesa_visual.visualID = visinfo->visualid; 1406 v->mesa_visual.screen = visinfo->screen; 1407#endif 1408 1409#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1410 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1411#else 1412 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1413#endif 1414 1415 v->mesa_visual.visualRating = visualCaveat; 1416 1417 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1418 1419 { 1420 const int xclass = v->mesa_visual.visualType; 1421 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1422 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1423 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1424 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1425 alpha_bits = 0; 1426 } 1427 else { 1428 /* this is an approximation */ 1429 int depth; 1430 depth = GET_VISUAL_DEPTH(v); 1431 red_bits = depth / 3; 1432 depth -= red_bits; 1433 green_bits = depth / 2; 1434 depth -= green_bits; 1435 blue_bits = depth; 1436 alpha_bits = 0; 1437 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1438 } 1439 } 1440 1441 if (alpha_flag && alpha_bits == 0) 1442 alpha_bits = 8; 1443 1444 _mesa_initialize_visual( &v->mesa_visual, 1445 rgb_flag, db_flag, stereo_flag, 1446 red_bits, green_bits, 1447 blue_bits, alpha_bits, 1448 v->mesa_visual.indexBits, 1449 depth_size, 1450 stencil_size, 1451 accum_red_size, accum_green_size, 1452 accum_blue_size, accum_alpha_size, 1453 0 ); 1454 1455 /* XXX minor hack */ 1456 v->mesa_visual.level = level; 1457 return v; 1458} 1459 1460 1461void XMesaDestroyVisual( XMesaVisual v ) 1462{ 1463#ifndef XFree86Server 1464 _mesa_free(v->visinfo); 1465#endif 1466 _mesa_free(v); 1467} 1468 1469 1470 1471/** 1472 * Create a new XMesaContext. 1473 * \param v the XMesaVisual 1474 * \param share_list another XMesaContext with which to share display 1475 * lists or NULL if no sharing is wanted. 1476 * \return an XMesaContext or NULL if error. 1477 */ 1478XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1479{ 1480 static GLboolean firstTime = GL_TRUE; 1481 XMesaContext c; 1482 GLcontext *mesaCtx; 1483 struct dd_function_table functions; 1484 TNLcontext *tnl; 1485 1486 if (firstTime) { 1487 _glthread_INIT_MUTEX(_xmesa_lock); 1488 firstTime = GL_FALSE; 1489 } 1490 1491 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1492 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1493 if (!c) 1494 return NULL; 1495 1496 mesaCtx = &(c->mesa); 1497 1498 /* initialize with default driver functions, then plug in XMesa funcs */ 1499 _mesa_init_driver_functions(&functions); 1500 xmesa_init_driver_functions(v, &functions); 1501 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1502 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1503 &functions, (void *) c)) { 1504 _mesa_free(c); 1505 return NULL; 1506 } 1507 1508 _mesa_enable_sw_extensions(mesaCtx); 1509 _mesa_enable_1_3_extensions(mesaCtx); 1510 _mesa_enable_1_4_extensions(mesaCtx); 1511 _mesa_enable_1_5_extensions(mesaCtx); 1512 _mesa_enable_2_0_extensions(mesaCtx); 1513#if ENABLE_EXT_texure_compression_s3tc 1514 if (c->Mesa_DXTn) { 1515 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1516 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1517 } 1518 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1519#endif 1520#if ENABLE_EXT_timer_query 1521 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1522#endif 1523 1524#ifdef XFree86Server 1525 /* If we're running in the X server, do bounds checking to prevent 1526 * segfaults and server crashes! 1527 */ 1528 mesaCtx->Const.CheckArrayBounds = GL_TRUE; 1529#endif 1530 1531 /* finish up xmesa context initializations */ 1532 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1533 c->xm_visual = v; 1534 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1535 c->display = v->display; 1536 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1537 1538 /* Initialize the software rasterizer and helper modules. 1539 */ 1540 if (!_swrast_CreateContext( mesaCtx ) || 1541 !_vbo_CreateContext( mesaCtx ) || 1542 !_tnl_CreateContext( mesaCtx ) || 1543 !_swsetup_CreateContext( mesaCtx )) { 1544 _mesa_free_context_data(&c->mesa); 1545 _mesa_free(c); 1546 return NULL; 1547 } 1548 1549 /* tnl setup */ 1550 tnl = TNL_CONTEXT(mesaCtx); 1551 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1552 /* swrast setup */ 1553 xmesa_register_swrast_functions( mesaCtx ); 1554 _swsetup_Wakeup(mesaCtx); 1555 1556 return c; 1557} 1558 1559 1560 1561void XMesaDestroyContext( XMesaContext c ) 1562{ 1563 GLcontext *mesaCtx = &c->mesa; 1564#ifdef FX 1565 XMesaBuffer xmbuf = XMESA_BUFFER(mesaCtx->DrawBuffer); 1566 1567 if (xmbuf && xmbuf->FXctx) 1568 fxMesaDestroyContext(xmbuf->FXctx); 1569#endif 1570 _swsetup_DestroyContext( mesaCtx ); 1571 _swrast_DestroyContext( mesaCtx ); 1572 _tnl_DestroyContext( mesaCtx ); 1573 _vbo_DestroyContext( mesaCtx ); 1574 _mesa_free_context_data( mesaCtx ); 1575 _mesa_free( c ); 1576} 1577 1578 1579 1580/** 1581 * Private function for creating an XMesaBuffer which corresponds to an 1582 * X window or pixmap. 1583 * \param v the window's XMesaVisual 1584 * \param w the window we're wrapping 1585 * \param c context used to initialize the buffer if 3Dfx mode in use. 1586 * \return new XMesaBuffer or NULL if error 1587 */ 1588XMesaBuffer 1589XMesaCreateWindowBuffer2(XMesaVisual v, XMesaWindow w, XMesaContext c) 1590{ 1591#ifndef XFree86Server 1592 XWindowAttributes attr; 1593#endif 1594#ifdef FX 1595 char *fxEnvVar; 1596#endif 1597 int client = 0; 1598 XMesaBuffer b; 1599 XMesaColormap cmap; 1600 1601 assert(v); 1602 assert(w); 1603 (void) c; 1604 1605 /* Check that window depth matches visual depth */ 1606#ifdef XFree86Server 1607 client = CLIENT_ID(((XMesaDrawable)w)->id); 1608 1609 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1610 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1611 GET_VISUAL_DEPTH(v), ((XMesaDrawable) w)->depth); 1612 return NULL; 1613 } 1614#else 1615 XGetWindowAttributes( v->display, w, &attr ); 1616 1617 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1618 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1619 GET_VISUAL_DEPTH(v), attr.depth); 1620 return NULL; 1621 } 1622#endif 1623 1624 /* Find colormap */ 1625#ifdef XFree86Server 1626 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1627#else 1628 if (attr.colormap) { 1629 cmap = attr.colormap; 1630 } 1631 else { 1632 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1633 /* this is weird, a window w/out a colormap!? */ 1634 /* OK, let's just allocate a new one and hope for the best */ 1635 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1636 } 1637#endif 1638 1639 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1640 if (!b) 1641 return NULL; 1642 1643 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1644 (XMesaDrawable) w, cmap )) { 1645 xmesa_free_buffer(b); 1646 return NULL; 1647 } 1648 1649#ifdef FX 1650 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1651 if (fxEnvVar) { 1652 if (fxEnvVar[0]!='d') { 1653 int attribs[100]; 1654 int numAttribs = 0; 1655 int hw; 1656 if (v->mesa_visual.depthBits > 0) { 1657 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1658 attribs[numAttribs++] = v->mesa_visual.depthBits; 1659 } 1660 if (v->mesa_visual.doubleBufferMode) { 1661 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1662 } 1663 if (v->mesa_visual.accumRedBits > 0) { 1664 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1665 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1666 } 1667 if (v->mesa_visual.stencilBits > 0) { 1668 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1669 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1670 } 1671 if (v->mesa_visual.alphaBits > 0) { 1672 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1673 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1674 } 1675 if (1) { 1676 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1677 attribs[numAttribs++] = (int) &(c->mesa); 1678 } 1679 attribs[numAttribs++] = FXMESA_NONE; 1680 1681 /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ 1682 hw = fxMesaSelectCurrentBoard(0); 1683 1684 /* if these fail, there's a new bug somewhere */ 1685 ASSERT(b->mesa_buffer.Width > 0); 1686 ASSERT(b->mesa_buffer.Height > 0); 1687 1688 if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) { 1689 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1690 b->mesa_buffer.Height, attribs); 1691 if ((v->undithered_pf!=PF_Index) && (b->backxrb->ximage)) { 1692 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1693 if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) { 1694 b->FXwindowHack = GL_TRUE; 1695 FX_grSstControl(GR_CONTROL_DEACTIVATE); 1696 } 1697 else { 1698 b->FXwindowHack = GL_FALSE; 1699 } 1700 } 1701 } 1702 else { 1703 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1704 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1705 GR_REFRESH_75Hz, attribs); 1706 else 1707 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1708 b->mesa_buffer.Height, attribs); 1709 b->FXisHackUsable = GL_FALSE; 1710 b->FXwindowHack = GL_FALSE; 1711 } 1712 /* 1713 fprintf(stderr, 1714 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1715 hw, b->mesa_buffer.Width, b->mesa_buffer.Height, 1716 b->FXisHackUsable, b->FXwindowHack); 1717 */ 1718 } 1719 } 1720 else { 1721 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1722 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1723 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1724 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1725 } 1726#endif 1727 1728 return b; 1729} 1730 1731 1732XMesaBuffer 1733XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1734{ 1735 return XMesaCreateWindowBuffer2( v, w, NULL ); 1736} 1737 1738 1739/** 1740 * Create a new XMesaBuffer from an X pixmap. 1741 * 1742 * \param v the XMesaVisual 1743 * \param p the pixmap 1744 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1745 * \c GLX_DIRECT_COLOR visual for the pixmap 1746 * \returns new XMesaBuffer or NULL if error 1747 */ 1748XMesaBuffer 1749XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1750{ 1751 int client = 0; 1752 XMesaBuffer b; 1753 1754 assert(v); 1755 1756 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1757 if (!b) 1758 return NULL; 1759 1760#ifdef XFree86Server 1761 client = CLIENT_ID(((XMesaDrawable)p)->id); 1762#endif 1763 1764 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1765 (XMesaDrawable) p, cmap)) { 1766 xmesa_free_buffer(b); 1767 return NULL; 1768 } 1769 1770 return b; 1771} 1772 1773 1774 1775XMesaBuffer 1776XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1777 unsigned int width, unsigned int height) 1778{ 1779#ifdef XFree86Server 1780 return 0; 1781#else 1782 int client = 0; 1783 XMesaWindow root; 1784 XMesaDrawable drawable; /* X Pixmap Drawable */ 1785 XMesaBuffer b; 1786 1787 /* allocate pixmap for front buffer */ 1788 root = RootWindow( v->display, v->visinfo->screen ); 1789 drawable = XCreatePixmap(v->display, root, width, height, 1790 v->visinfo->depth); 1791 if (!drawable) 1792 return NULL; 1793 1794 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1795 if (!b) 1796 return NULL; 1797 1798 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1799 drawable, cmap)) { 1800 xmesa_free_buffer(b); 1801 return NULL; 1802 } 1803 1804 return b; 1805#endif 1806} 1807 1808 1809 1810/* 1811 * Deallocate an XMesaBuffer structure and all related info. 1812 */ 1813void 1814XMesaDestroyBuffer(XMesaBuffer b) 1815{ 1816 xmesa_free_buffer(b); 1817} 1818 1819 1820/** 1821 * Query the current window size and update the corresponding GLframebuffer 1822 * and all attached renderbuffers. 1823 * Called when: 1824 * 1. the first time a buffer is bound to a context. 1825 * 2. from glViewport to poll for window size changes 1826 * 3. from the XMesaResizeBuffers() API function. 1827 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1828 * when resizing a buffer when no rendering context is bound. 1829 */ 1830void 1831xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1832{ 1833 GLuint width, height; 1834 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1835 if (drawBuffer->mesa_buffer.Width != width || 1836 drawBuffer->mesa_buffer.Height != height) { 1837 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL; 1838 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1839 } 1840 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1841} 1842 1843 1844/* 1845 * Bind buffer b to context c and make c the current rendering context. 1846 */ 1847GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1848{ 1849 return XMesaMakeCurrent2( c, b, b ); 1850} 1851 1852 1853/* 1854 * Bind buffer b to context c and make c the current rendering context. 1855 */ 1856GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1857 XMesaBuffer readBuffer ) 1858{ 1859 if (c) { 1860 if (!drawBuffer || !readBuffer) 1861 return GL_FALSE; /* must specify buffers! */ 1862 1863#ifdef FX 1864 if (drawBuffer->FXctx) { 1865 fxMesaMakeCurrent(drawBuffer->FXctx); 1866 1867 c->xm_buffer = drawBuffer; 1868 1869 return GL_TRUE; 1870 } 1871#endif 1872 if (&(c->mesa) == _mesa_get_current_context() 1873 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1874 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1875 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1876 /* same context and buffer, do nothing */ 1877 return GL_TRUE; 1878 } 1879 1880 c->xm_buffer = drawBuffer; 1881 1882 /* Call this periodically to detect when the user has begun using 1883 * GL rendering from multiple threads. 1884 */ 1885 _glapi_check_multithread(); 1886 1887 xmesa_check_and_update_buffer_size(c, drawBuffer); 1888 if (readBuffer != drawBuffer) 1889 xmesa_check_and_update_buffer_size(c, readBuffer); 1890 1891 _mesa_make_current(&(c->mesa), 1892 &drawBuffer->mesa_buffer, 1893 &readBuffer->mesa_buffer); 1894 1895 if (c->xm_visual->mesa_visual.rgbMode) { 1896 /* 1897 * Must recompute and set these pixel values because colormap 1898 * can be different for different windows. 1899 */ 1900 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1901 c->clearcolor[0], 1902 c->clearcolor[1], 1903 c->clearcolor[2], 1904 c->clearcolor[3], 1905 c->xm_visual->undithered_pf); 1906 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1907 } 1908 1909 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1910 drawBuffer->wasCurrent = GL_TRUE; 1911 } 1912 else { 1913 /* Detach */ 1914 _mesa_make_current( NULL, NULL, NULL ); 1915 } 1916 return GL_TRUE; 1917} 1918 1919 1920/* 1921 * Unbind the context c from its buffer. 1922 */ 1923GLboolean XMesaUnbindContext( XMesaContext c ) 1924{ 1925 /* A no-op for XFree86 integration purposes */ 1926 return GL_TRUE; 1927} 1928 1929 1930XMesaContext XMesaGetCurrentContext( void ) 1931{ 1932 GET_CURRENT_CONTEXT(ctx); 1933 if (ctx) { 1934 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1935 return xmesa; 1936 } 1937 else { 1938 return 0; 1939 } 1940} 1941 1942 1943XMesaBuffer XMesaGetCurrentBuffer( void ) 1944{ 1945 GET_CURRENT_CONTEXT(ctx); 1946 if (ctx) { 1947 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1948 return xmbuf; 1949 } 1950 else { 1951 return 0; 1952 } 1953} 1954 1955 1956/* New in Mesa 3.1 */ 1957XMesaBuffer XMesaGetCurrentReadBuffer( void ) 1958{ 1959 GET_CURRENT_CONTEXT(ctx); 1960 if (ctx) { 1961 return XMESA_BUFFER(ctx->ReadBuffer); 1962 } 1963 else { 1964 return 0; 1965 } 1966} 1967 1968 1969GLboolean XMesaForceCurrent(XMesaContext c) 1970{ 1971 if (c) { 1972#ifdef XGLServer 1973 _glapi_set_dispatch(c->mesa.CurrentDispatch); 1974#endif 1975 1976 if (&(c->mesa) != _mesa_get_current_context()) { 1977 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 1978 } 1979 } 1980 else { 1981 _mesa_make_current(NULL, NULL, NULL); 1982 } 1983 return GL_TRUE; 1984} 1985 1986 1987GLboolean XMesaLoseCurrent(XMesaContext c) 1988{ 1989 (void) c; 1990 _mesa_make_current(NULL, NULL, NULL); 1991 return GL_TRUE; 1992} 1993 1994 1995GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask ) 1996{ 1997 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask); 1998 return GL_TRUE; 1999} 2000 2001 2002/* 2003 * Switch 3Dfx support hack between window and full-screen mode. 2004 */ 2005GLboolean XMesaSetFXmode( GLint mode ) 2006{ 2007#ifdef FX 2008 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2009 if (fx && fx[0] != 'd') { 2010 GET_CURRENT_CONTEXT(ctx); 2011 GrHwConfiguration hw; 2012 if (!FX_grSstQueryHardware(&hw)) { 2013 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2014 return GL_FALSE; 2015 } 2016 if (hw.num_sst < 1) { 2017 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2018 return GL_FALSE; 2019 } 2020 if (ctx) { 2021 /* [dBorca] Hack alert: 2022 * oh, this is sooo wrong: ctx above is 2023 * really an fxMesaContext, not an XMesaContext 2024 */ 2025 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 2026 if (mode == XMESA_FX_WINDOW) { 2027 if (xmbuf->FXisHackUsable) { 2028 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2029 xmbuf->FXwindowHack = GL_TRUE; 2030 return GL_TRUE; 2031 } 2032 } 2033 else if (mode == XMESA_FX_FULLSCREEN) { 2034 FX_grSstControl(GR_CONTROL_ACTIVATE); 2035 xmbuf->FXwindowHack = GL_FALSE; 2036 return GL_TRUE; 2037 } 2038 else { 2039 /* Error: Bad mode value */ 2040 } 2041 } 2042 } 2043 /*fprintf(stderr, "fallthrough\n");*/ 2044#else 2045 (void) mode; 2046#endif 2047 return GL_FALSE; 2048} 2049 2050 2051 2052#ifdef FX 2053/* 2054 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2055 */ 2056static void FXgetImage( XMesaBuffer b ) 2057{ 2058 GET_CURRENT_CONTEXT(ctx); 2059 static unsigned short pixbuf[MAX_WIDTH]; 2060 GLuint x, y; 2061 GLuint width, height; 2062 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2063 2064#ifdef XFree86Server 2065 x = b->frontxrb->pixmap->x; 2066 y = b->frontxrb->pixmap->y; 2067 width = b->frontxrb->pixmap->width; 2068 height = b->frontxrb->pixmap->height; 2069 depth = b->frontxrb->pixmap->depth; 2070#else 2071 xmesa_get_window_size(b->display, b, &width, &height); 2072 x = y = 0; 2073#endif 2074 if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) { 2075 b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width); 2076 b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height); 2077 if (b->mesa_buffer.Width & 1) 2078 b->mesa_buffer.Width--; /* prevent odd width */ 2079 } 2080 2081 /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */ 2082 /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */ 2083 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2084 /* Special case: 16bpp RGB */ 2085 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2086 0, b->FXctx->height - b->mesa_buffer.Height, /*pos*/ 2087 b->mesa_buffer.Width, b->mesa_buffer.Height, /* size */ 2088 b->mesa_buffer.Width * sizeof(GLushort), /* stride */ 2089 b->backxrb->ximage->data); /* dest buffer */ 2090 } 2091 else if (b->xm_visual->dithered_pf==PF_Dither 2092 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2093 /* Special case: 8bpp RGB */ 2094 for (y=0;y<b->mesa_buffer.Height;y++) { 2095 GLubyte *ptr = (GLubyte*) b->backxrb->ximage->data 2096 + b->backxrb->ximage->bytes_per_line * y; 2097 XDITHER_SETUP(y); 2098 2099 /* read row from 3Dfx frame buffer */ 2100 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2101 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2102 b->mesa_buffer.Width, 1, 2103 0, 2104 pixbuf ); 2105 2106 /* write to XImage back buffer */ 2107 for (x=0;x<b->mesa_buffer.Width;x++) { 2108 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2109 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2110 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2111 *ptr++ = XDITHER( x, r, g, b); 2112 } 2113 } 2114 } 2115 else { 2116 /* General case: slow! */ 2117 for (y=0;y<b->mesa_buffer.Height;y++) { 2118 /* read row from 3Dfx frame buffer */ 2119 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2120 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2121 b->mesa_buffer.Width, 1, 2122 0, 2123 pixbuf ); 2124 2125 /* write to XImage back buffer */ 2126 for (x=0;x<b->mesa_buffer.Width;x++) { 2127 XMesaPutPixel(b->backxrb->ximage,x,y, 2128 xmesa_color_to_pixel(ctx, 2129 (pixbuf[x] & 0xf800) >> 8, 2130 (pixbuf[x] & 0x07e0) >> 3, 2131 (pixbuf[x] & 0x001f) << 3, 2132 0xff, 2133 b->xm_visual->undithered_pf)); 2134 } 2135 } 2136 } 2137 /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */ 2138} 2139#endif 2140 2141 2142/* 2143 * Copy the back buffer to the front buffer. If there's no back buffer 2144 * this is a no-op. 2145 */ 2146void XMesaSwapBuffers( XMesaBuffer b ) 2147{ 2148 GET_CURRENT_CONTEXT(ctx); 2149 2150 if (!b->backxrb) { 2151 /* single buffered */ 2152 return; 2153 } 2154 2155 /* If we're swapping the buffer associated with the current context 2156 * we have to flush any pending rendering commands first. 2157 */ 2158 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2159 _mesa_notifySwapBuffers(ctx); 2160 2161 if (b->db_mode) { 2162#ifdef FX 2163 if (b->FXctx) { 2164 fxMesaSwapBuffers(); 2165 2166 if (b->FXwindowHack) 2167 FXgetImage(b); 2168 else 2169 return; 2170 } 2171#endif 2172 if (b->backxrb->ximage) { 2173 /* Copy Ximage (back buf) from client memory to server window */ 2174#if defined(USE_XSHM) && !defined(XFree86Server) 2175 if (b->shm) { 2176 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2177 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2178 b->swapgc, 2179 b->backxrb->ximage, 0, 0, 2180 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2181 False ); 2182 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2183 } 2184 else 2185#endif 2186 { 2187 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2188 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2189 b->swapgc, 2190 b->backxrb->ximage, 0, 0, 2191 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2192 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2193 } 2194 } 2195 else if (b->backxrb->pixmap) { 2196 /* Copy pixmap (back buf) to window (front buf) on server */ 2197 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2198 XMesaCopyArea( b->xm_visual->display, 2199 b->backxrb->pixmap, /* source drawable */ 2200 b->frontxrb->drawable, /* dest. drawable */ 2201 b->swapgc, 2202 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2203 0, 0 /* dest region */ 2204 ); 2205 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2206 } 2207 2208 if (b->swAlpha) 2209 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); 2210 } 2211#if !defined(XFree86Server) 2212 XSync( b->xm_visual->display, False ); 2213#endif 2214} 2215 2216 2217 2218/* 2219 * Copy sub-region of back buffer to front buffer 2220 */ 2221void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2222{ 2223 GET_CURRENT_CONTEXT(ctx); 2224 2225 /* If we're swapping the buffer associated with the current context 2226 * we have to flush any pending rendering commands first. 2227 */ 2228 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2229 _mesa_notifySwapBuffers(ctx); 2230 2231 if (!b->backxrb) { 2232 /* single buffered */ 2233 return; 2234 } 2235 2236 if (b->db_mode) { 2237 int yTop = b->mesa_buffer.Height - y - height; 2238#ifdef FX 2239 if (b->FXctx) { 2240 fxMesaSwapBuffers(); 2241 if (b->FXwindowHack) 2242 FXgetImage(b); 2243 else 2244 return; 2245 } 2246#endif 2247 if (b->backxrb->ximage) { 2248 /* Copy Ximage from host's memory to server's window */ 2249#if defined(USE_XSHM) && !defined(XFree86Server) 2250 if (b->shm) { 2251 /* XXX assuming width and height aren't too large! */ 2252 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2253 b->swapgc, 2254 b->backxrb->ximage, x, yTop, 2255 x, yTop, width, height, False ); 2256 /* wait for finished event??? */ 2257 } 2258 else 2259#endif 2260 { 2261 /* XXX assuming width and height aren't too large! */ 2262 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2263 b->swapgc, 2264 b->backxrb->ximage, x, yTop, 2265 x, yTop, width, height ); 2266 } 2267 } 2268 else { 2269 /* Copy pixmap to window on server */ 2270 XMesaCopyArea( b->xm_visual->display, 2271 b->backxrb->pixmap, /* source drawable */ 2272 b->frontxrb->drawable, /* dest. drawable */ 2273 b->swapgc, 2274 x, yTop, width, height, /* source region */ 2275 x, yTop /* dest region */ 2276 ); 2277 } 2278 } 2279} 2280 2281 2282/* 2283 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2284 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2285 * back buffer directly. 2286 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2287 * ximage - pointer to back buffer's XImage, or NULL 2288 * Return: GL_TRUE = context is double buffered 2289 * GL_FALSE = context is single buffered 2290 */ 2291#ifndef XFree86Server 2292GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2293 XMesaPixmap *pixmap, 2294 XMesaImage **ximage ) 2295{ 2296 if (b->db_mode) { 2297 if (pixmap) 2298 *pixmap = b->backxrb->pixmap; 2299 if (ximage) 2300 *ximage = b->backxrb->ximage; 2301 return GL_TRUE; 2302 } 2303 else { 2304 *pixmap = 0; 2305 *ximage = NULL; 2306 return GL_FALSE; 2307 } 2308} 2309#endif /* XFree86Server */ 2310 2311 2312/* 2313 * Return the depth buffer associated with an XMesaBuffer. 2314 * Input: b - the XMesa buffer handle 2315 * Output: width, height - size of buffer in pixels 2316 * bytesPerValue - bytes per depth value (2 or 4) 2317 * buffer - pointer to depth buffer values 2318 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2319 */ 2320GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2321 GLint *bytesPerValue, void **buffer ) 2322{ 2323 struct gl_renderbuffer *rb 2324 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2325 if (!rb || !rb->Data) { 2326 *width = 0; 2327 *height = 0; 2328 *bytesPerValue = 0; 2329 *buffer = 0; 2330 return GL_FALSE; 2331 } 2332 else { 2333 *width = b->mesa_buffer.Width; 2334 *height = b->mesa_buffer.Height; 2335 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2336 ? sizeof(GLushort) : sizeof(GLuint); 2337 *buffer = rb->Data; 2338 return GL_TRUE; 2339 } 2340} 2341 2342 2343void XMesaFlush( XMesaContext c ) 2344{ 2345 if (c && c->xm_visual) { 2346#ifdef XFree86Server 2347 /* NOT_NEEDED */ 2348#else 2349 XSync( c->xm_visual->display, False ); 2350#endif 2351 } 2352} 2353 2354 2355 2356const char *XMesaGetString( XMesaContext c, int name ) 2357{ 2358 (void) c; 2359 if (name==XMESA_VERSION) { 2360 return "5.0"; 2361 } 2362 else if (name==XMESA_EXTENSIONS) { 2363 return ""; 2364 } 2365 else { 2366 return NULL; 2367 } 2368} 2369 2370 2371 2372XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2373{ 2374 XMesaBuffer b; 2375 for (b=XMesaBufferList; b; b=b->Next) { 2376 if (b->frontxrb->drawable == d && b->display == dpy) { 2377 return b; 2378 } 2379 } 2380 return NULL; 2381} 2382 2383 2384/** 2385 * Free/destroy all XMesaBuffers associated with given display. 2386 */ 2387void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 2388{ 2389 XMesaBuffer b, next; 2390 for (b = XMesaBufferList; b; b = next) { 2391 next = b->Next; 2392 if (b->display == dpy) { 2393 xmesa_free_buffer(b); 2394 } 2395 } 2396} 2397 2398 2399/* 2400 * Look for XMesaBuffers whose X window has been destroyed. 2401 * Deallocate any such XMesaBuffers. 2402 */ 2403void XMesaGarbageCollect( void ) 2404{ 2405 XMesaBuffer b, next; 2406 for (b=XMesaBufferList; b; b=next) { 2407 next = b->Next; 2408 if (b->display && b->frontxrb->drawable && b->type == WINDOW) { 2409#ifdef XFree86Server 2410 /* NOT_NEEDED */ 2411#else 2412 XSync(b->display, False); 2413 if (!window_exists( b->display, b->frontxrb->drawable )) { 2414 /* found a dead window, free the ancillary info */ 2415 XMesaDestroyBuffer( b ); 2416 } 2417#endif 2418 } 2419 } 2420} 2421 2422 2423unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2424 GLfloat red, GLfloat green, 2425 GLfloat blue, GLfloat alpha ) 2426{ 2427 GLcontext *ctx = &xmesa->mesa; 2428 GLint r = (GLint) (red * 255.0F); 2429 GLint g = (GLint) (green * 255.0F); 2430 GLint b = (GLint) (blue * 255.0F); 2431 GLint a = (GLint) (alpha * 255.0F); 2432 2433 switch (xmesa->pixelformat) { 2434 case PF_Index: 2435 return 0; 2436 case PF_Truecolor: 2437 { 2438 unsigned long p; 2439 PACK_TRUECOLOR( p, r, g, b ); 2440 return p; 2441 } 2442 case PF_8A8B8G8R: 2443 return PACK_8A8B8G8R( r, g, b, a ); 2444 case PF_8A8R8G8B: 2445 return PACK_8A8R8G8B( r, g, b, a ); 2446 case PF_8R8G8B: 2447 return PACK_8R8G8B( r, g, b ); 2448 case PF_5R6G5B: 2449 return PACK_5R6G5B( r, g, b ); 2450 case PF_Dither: 2451 { 2452 DITHER_SETUP; 2453 return DITHER( x, y, r, g, b ); 2454 } 2455 case PF_1Bit: 2456 /* 382 = (3*255)/2 */ 2457 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2458 case PF_HPCR: 2459 return DITHER_HPCR(x, y, r, g, b); 2460 case PF_Lookup: 2461 { 2462 LOOKUP_SETUP; 2463 return LOOKUP( r, g, b ); 2464 } 2465 case PF_Grayscale: 2466 return GRAY_RGB( r, g, b ); 2467 case PF_Dither_5R6G5B: 2468 /* fall through */ 2469 case PF_Dither_True: 2470 { 2471 unsigned long p; 2472 PACK_TRUEDITHER(p, x, y, r, g, b); 2473 return p; 2474 } 2475 default: 2476 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2477 } 2478 return 0; 2479} 2480 2481 2482/* 2483 * This is typically called when the window size changes and we need 2484 * to reallocate the buffer's back/depth/stencil/accum buffers. 2485 */ 2486void 2487XMesaResizeBuffers( XMesaBuffer b ) 2488{ 2489 GET_CURRENT_CONTEXT(ctx); 2490 XMesaContext xmctx = XMESA_CONTEXT(ctx); 2491 if (!xmctx) 2492 return; 2493 xmesa_check_and_update_buffer_size(xmctx, b); 2494} 2495 2496