xm_api.c revision b0d0e53a54ce79f57334942bf0b3762db8a3a7b8
1/* 2 * Mesa 3-D graphics library 3 * Version: 7.1 4 * 5 * Copyright (C) 1999-2007 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. 52 * 53 */ 54 55#ifdef __CYGWIN__ 56#undef WIN32 57#undef __WIN32__ 58#endif 59 60#include "xm_api.h" 61#include "main/context.h" 62#include "main/framebuffer.h" 63 64#include "state_tracker/st_public.h" 65#include "state_tracker/st_context.h" 66#include "pipe/p_defines.h" 67#include "pipe/p_screen.h" 68#include "pipe/p_context.h" 69 70#include "xm_winsys.h" 71#include <GL/glx.h> 72 73 74/* Driver interface routines, set up by xlib backend on library 75 * _init(). These are global in the same way that function names are 76 * global. 77 */ 78static struct xm_driver driver; 79 80void xmesa_set_driver( const struct xm_driver *templ ) 81{ 82 driver = *templ; 83} 84 85/** 86 * Global X driver lock 87 */ 88pipe_mutex _xmesa_lock; 89 90 91 92/**********************************************************************/ 93/***** X Utility Functions *****/ 94/**********************************************************************/ 95 96 97/** 98 * Return the host's byte order as LSBFirst or MSBFirst ala X. 99 */ 100static int host_byte_order( void ) 101{ 102 int i = 1; 103 char *cptr = (char *) &i; 104 return (*cptr==1) ? LSBFirst : MSBFirst; 105} 106 107 108/** 109 * Check if the X Shared Memory extension is available. 110 * Return: 0 = not available 111 * 1 = shared XImage support available 112 * 2 = shared Pixmap support available also 113 */ 114int xmesa_check_for_xshm( Display *display ) 115{ 116#if defined(USE_XSHM) 117 int major, minor, ignore; 118 Bool pixmaps; 119 120 if (getenv("SP_NO_RAST")) 121 return 0; 122 123 if (getenv("MESA_NOSHM")) { 124 return 0; 125 } 126 127 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 128 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 129 return (pixmaps==True) ? 2 : 1; 130 } 131 else { 132 return 0; 133 } 134 } 135 else { 136 return 0; 137 } 138#else 139 /* No XSHM support */ 140 return 0; 141#endif 142} 143 144 145/** 146 * Return the true number of bits per pixel for XImages. 147 * For example, if we request a 24-bit deep visual we may actually need/get 148 * 32bpp XImages. This function returns the appropriate bpp. 149 * Input: dpy - the X display 150 * visinfo - desribes the visual to be used for XImages 151 * Return: true number of bits per pixel for XImages 152 */ 153static int 154bits_per_pixel( XMesaVisual xmv ) 155{ 156 Display *dpy = xmv->display; 157 XVisualInfo * visinfo = xmv->visinfo; 158 XImage *img; 159 int bitsPerPixel; 160 /* Create a temporary XImage */ 161 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 162 ZPixmap, 0, /*format, offset*/ 163 (char*) MALLOC(8), /*data*/ 164 1, 1, /*width, height*/ 165 32, /*bitmap_pad*/ 166 0 /*bytes_per_line*/ 167 ); 168 assert(img); 169 /* grab the bits/pixel value */ 170 bitsPerPixel = img->bits_per_pixel; 171 /* free the XImage */ 172 _mesa_free( img->data ); 173 img->data = NULL; 174 XDestroyImage( img ); 175 return bitsPerPixel; 176} 177 178 179 180/* 181 * Determine if a given X window ID is valid (window exists). 182 * Do this by calling XGetWindowAttributes() for the window and 183 * checking if we catch an X error. 184 * Input: dpy - the display 185 * win - the window to check for existance 186 * Return: GL_TRUE - window exists 187 * GL_FALSE - window doesn't exist 188 */ 189static GLboolean WindowExistsFlag; 190 191static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr ) 192{ 193 (void) dpy; 194 if (xerr->error_code == BadWindow) { 195 WindowExistsFlag = GL_FALSE; 196 } 197 return 0; 198} 199 200static GLboolean window_exists( Display *dpy, Window win ) 201{ 202 XWindowAttributes wa; 203 int (*old_handler)( Display*, XErrorEvent* ); 204 WindowExistsFlag = GL_TRUE; 205 old_handler = XSetErrorHandler(window_exists_err_handler); 206 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 207 XSetErrorHandler(old_handler); 208 return WindowExistsFlag; 209} 210 211static Status 212get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height ) 213{ 214 Window root; 215 Status stat; 216 int xpos, ypos; 217 unsigned int w, h, bw, depth; 218 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 219 *width = w; 220 *height = h; 221 return stat; 222} 223 224 225/** 226 * Return the size of the window (or pixmap) that corresponds to the 227 * given XMesaBuffer. 228 * \param width returns width in pixels 229 * \param height returns height in pixels 230 */ 231static void 232xmesa_get_window_size(Display *dpy, XMesaBuffer b, 233 GLuint *width, GLuint *height) 234{ 235 Status stat; 236 237 pipe_mutex_lock(_xmesa_lock); 238 XSync(b->xm_visual->display, 0); /* added for Chromium */ 239 stat = get_drawable_size(dpy, b->drawable, width, height); 240 pipe_mutex_unlock(_xmesa_lock); 241 242 if (!stat) { 243 /* probably querying a window that's recently been destroyed */ 244 _mesa_warning(NULL, "XGetGeometry failed!\n"); 245 *width = *height = 1; 246 } 247} 248 249#define GET_REDMASK(__v) __v->mesa_visual.redMask 250#define GET_GREENMASK(__v) __v->mesa_visual.greenMask 251#define GET_BLUEMASK(__v) __v->mesa_visual.blueMask 252 253 254/** 255 * Choose the pixel format for the given visual. 256 * This will tell the gallium driver how to pack pixel data into 257 * drawing surfaces. 258 */ 259static GLuint 260choose_pixel_format(XMesaVisual v) 261{ 262 boolean native_byte_order = (host_byte_order() == 263 ImageByteOrder(v->display)); 264 265 if ( GET_REDMASK(v) == 0x0000ff 266 && GET_GREENMASK(v) == 0x00ff00 267 && GET_BLUEMASK(v) == 0xff0000 268 && v->BitsPerPixel == 32) { 269 if (native_byte_order) { 270 /* no byteswapping needed */ 271 return 0 /* PIXEL_FORMAT_U_A8_B8_G8_R8 */; 272 } 273 else { 274 return PIPE_FORMAT_R8G8B8A8_UNORM; 275 } 276 } 277 else if ( GET_REDMASK(v) == 0xff0000 278 && GET_GREENMASK(v) == 0x00ff00 279 && GET_BLUEMASK(v) == 0x0000ff 280 && v->BitsPerPixel == 32) { 281 if (native_byte_order) { 282 /* no byteswapping needed */ 283 return PIPE_FORMAT_A8R8G8B8_UNORM; 284 } 285 else { 286 return PIPE_FORMAT_B8G8R8A8_UNORM; 287 } 288 } 289 else if ( GET_REDMASK(v) == 0xf800 290 && GET_GREENMASK(v) == 0x07e0 291 && GET_BLUEMASK(v) == 0x001f 292 && native_byte_order 293 && v->BitsPerPixel == 16) { 294 /* 5-6-5 RGB */ 295 return PIPE_FORMAT_R5G6B5_UNORM; 296 } 297 298 assert(0); 299 return 0; 300} 301 302 303 304/**********************************************************************/ 305/***** Linked list of XMesaBuffers *****/ 306/**********************************************************************/ 307 308XMesaBuffer XMesaBufferList = NULL; 309 310 311/** 312 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 313 * Note that XMesaBuffer is derived from GLframebuffer. 314 * The new XMesaBuffer will not have any size (Width=Height=0). 315 * 316 * \param d the corresponding X drawable (window or pixmap) 317 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 318 * \param vis the buffer's visual 319 * \param cmap the window's colormap, if known. 320 * \return new XMesaBuffer or NULL if any problem 321 */ 322static XMesaBuffer 323create_xmesa_buffer(Drawable d, BufferType type, 324 XMesaVisual vis, Colormap cmap) 325{ 326 XMesaBuffer b; 327 GLframebuffer *fb; 328 enum pipe_format colorFormat, depthFormat, stencilFormat; 329 uint width, height; 330 331 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 332 333 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 334 if (!b) 335 return NULL; 336 337 b->drawable = d; 338 339 b->xm_visual = vis; 340 b->type = type; 341 b->cmap = cmap; 342 343 /* determine PIPE_FORMATs for buffers */ 344 colorFormat = choose_pixel_format(vis); 345 346 if (vis->mesa_visual.depthBits == 0) 347 depthFormat = PIPE_FORMAT_NONE; 348#ifdef GALLIUM_CELL /* XXX temporary for Cell! */ 349 else 350 depthFormat = PIPE_FORMAT_S8Z24_UNORM; 351#else 352 else if (vis->mesa_visual.depthBits <= 16) 353 depthFormat = PIPE_FORMAT_Z16_UNORM; 354 else if (vis->mesa_visual.depthBits <= 24) 355 depthFormat = PIPE_FORMAT_S8Z24_UNORM; 356 else 357 depthFormat = PIPE_FORMAT_Z32_UNORM; 358#endif 359 360 if (vis->mesa_visual.stencilBits == 8) { 361 if (depthFormat == PIPE_FORMAT_S8Z24_UNORM) 362 stencilFormat = depthFormat; 363 else 364 stencilFormat = PIPE_FORMAT_S8_UNORM; 365 } 366 else { 367 /* no stencil */ 368 stencilFormat = PIPE_FORMAT_NONE; 369 if (depthFormat == PIPE_FORMAT_S8Z24_UNORM) { 370 /* use 24-bit Z, undefined stencil channel */ 371 depthFormat = PIPE_FORMAT_X8Z24_UNORM; 372 } 373 } 374 375 376 get_drawable_size(vis->display, d, &width, &height); 377 378 /* 379 * Create framebuffer, but we'll plug in our own renderbuffers below. 380 */ 381 b->stfb = st_create_framebuffer(&vis->mesa_visual, 382 colorFormat, depthFormat, stencilFormat, 383 width, height, 384 (void *) b); 385 fb = &b->stfb->Base; 386 387 /* 388 * Create scratch XImage for xmesa_display_surface() 389 */ 390 b->tempImage = XCreateImage(vis->display, 391 vis->visinfo->visual, 392 vis->visinfo->depth, 393 ZPixmap, 0, /* format, offset */ 394 NULL, /* data */ 395 0, 0, /* size */ 396 32, /* bitmap_pad */ 397 0); /* bytes_per_line */ 398 399 /* GLX_EXT_texture_from_pixmap */ 400 b->TextureTarget = 0; 401 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 402 b->TextureMipmap = 0; 403 404 /* insert buffer into linked list */ 405 b->Next = XMesaBufferList; 406 XMesaBufferList = b; 407 408 return b; 409} 410 411 412/** 413 * Find an XMesaBuffer by matching X display and colormap but NOT matching 414 * the notThis buffer. 415 */ 416XMesaBuffer 417xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis) 418{ 419 XMesaBuffer b; 420 for (b = XMesaBufferList; b; b = b->Next) { 421 if (b->xm_visual->display == dpy && 422 b->cmap == cmap && 423 b != notThis) { 424 return b; 425 } 426 } 427 return NULL; 428} 429 430 431/** 432 * Remove buffer from linked list, delete if no longer referenced. 433 */ 434static void 435xmesa_free_buffer(XMesaBuffer buffer) 436{ 437 XMesaBuffer prev = NULL, b; 438 439 for (b = XMesaBufferList; b; b = b->Next) { 440 if (b == buffer) { 441 struct gl_framebuffer *fb = &buffer->stfb->Base; 442 443 /* unlink buffer from list */ 444 if (prev) 445 prev->Next = buffer->Next; 446 else 447 XMesaBufferList = buffer->Next; 448 449 /* mark as delete pending */ 450 fb->DeletePending = GL_TRUE; 451 452 /* Since the X window for the XMesaBuffer is going away, we don't 453 * want to dereference this pointer in the future. 454 */ 455 b->drawable = 0; 456 457 buffer->tempImage->data = NULL; 458 XDestroyImage(buffer->tempImage); 459 460 /* Unreference. If count = zero we'll really delete the buffer */ 461 _mesa_unreference_framebuffer(&fb); 462 463 XFreeGC(b->xm_visual->display, b->gc); 464 465 free(buffer); 466 467 return; 468 } 469 /* continue search */ 470 prev = b; 471 } 472 /* buffer not found in XMesaBufferList */ 473 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 474} 475 476 477 478/**********************************************************************/ 479/***** Misc Private Functions *****/ 480/**********************************************************************/ 481 482 483/** 484 * When a context is bound for the first time, we can finally finish 485 * initializing the context's visual and buffer information. 486 * \param v the XMesaVisual to initialize 487 * \param b the XMesaBuffer to initialize (may be NULL) 488 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 489 * \param window the window/pixmap we're rendering into 490 * \param cmap the colormap associated with the window/pixmap 491 * \return GL_TRUE=success, GL_FALSE=failure 492 */ 493static GLboolean 494initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 495 GLboolean rgb_flag, Drawable window, 496 Colormap cmap) 497{ 498 ASSERT(!b || b->xm_visual == v); 499 500 /* Save true bits/pixel */ 501 v->BitsPerPixel = bits_per_pixel(v); 502 assert(v->BitsPerPixel > 0); 503 504 if (rgb_flag == GL_FALSE) { 505 /* COLOR-INDEXED WINDOW: not supported*/ 506 return GL_FALSE; 507 } 508 else { 509 /* RGB WINDOW: 510 * We support RGB rendering into almost any kind of visual. 511 */ 512 const int xclass = v->mesa_visual.visualType; 513 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) { 514 _mesa_warning(NULL, 515 "XMesa: RGB mode rendering not supported in given visual.\n"); 516 return GL_FALSE; 517 } 518 v->mesa_visual.indexBits = 0; 519 520 if (v->BitsPerPixel == 32) { 521 /* We use XImages for all front/back buffers. If an X Window or 522 * X Pixmap is 32bpp, there's no guarantee that the alpha channel 523 * will be preserved. For XImages we're in luck. 524 */ 525 v->mesa_visual.alphaBits = 8; 526 } 527 } 528 529 /* 530 * If MESA_INFO env var is set print out some debugging info 531 * which can help Brian figure out what's going on when a user 532 * reports bugs. 533 */ 534 if (_mesa_getenv("MESA_INFO")) { 535 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 536 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 537 _mesa_printf("X/Mesa depth = %d\n", v->visinfo->depth); 538 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 539 } 540 541 if (b && window) { 542 /* these should have been set in create_xmesa_buffer */ 543 ASSERT(b->drawable == window); 544 545 /* Setup for single/double buffering */ 546 if (v->mesa_visual.doubleBufferMode) { 547 /* Double buffered */ 548 b->shm = xmesa_check_for_xshm( v->display ); 549 } 550 551 /* X11 graphics context */ 552 b->gc = XCreateGC( v->display, window, 0, NULL ); 553 XSetFunction( v->display, b->gc, GXcopy ); 554 } 555 556 return GL_TRUE; 557} 558 559 560 561#define NUM_VISUAL_TYPES 6 562 563/** 564 * Convert an X visual type to a GLX visual type. 565 * 566 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 567 * to be converted. 568 * \return If \c visualType is a valid X visual type, a GLX visual type will 569 * be returned. Otherwise \c GLX_NONE will be returned. 570 * 571 * \note 572 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 573 * DRI CVS tree. 574 */ 575static GLint 576xmesa_convert_from_x_visual_type( int visualType ) 577{ 578 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 579 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 580 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 581 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 582 }; 583 584 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 585 ? glx_visual_types[ visualType ] : GLX_NONE; 586} 587 588 589/**********************************************************************/ 590/***** Public Functions *****/ 591/**********************************************************************/ 592 593 594/* 595 * Create a new X/Mesa visual. 596 * Input: display - X11 display 597 * visinfo - an XVisualInfo pointer 598 * rgb_flag - GL_TRUE = RGB mode, 599 * GL_FALSE = color index mode 600 * alpha_flag - alpha buffer requested? 601 * db_flag - GL_TRUE = double-buffered, 602 * GL_FALSE = single buffered 603 * stereo_flag - stereo visual? 604 * ximage_flag - GL_TRUE = use an XImage for back buffer, 605 * GL_FALSE = use an off-screen pixmap for back buffer 606 * depth_size - requested bits/depth values, or zero 607 * stencil_size - requested bits/stencil values, or zero 608 * accum_red_size - requested bits/red accum values, or zero 609 * accum_green_size - requested bits/green accum values, or zero 610 * accum_blue_size - requested bits/blue accum values, or zero 611 * accum_alpha_size - requested bits/alpha accum values, or zero 612 * num_samples - number of samples/pixel if multisampling, or zero 613 * level - visual level, usually 0 614 * visualCaveat - ala the GLX extension, usually GLX_NONE 615 * Return; a new XMesaVisual or 0 if error. 616 */ 617PUBLIC 618XMesaVisual XMesaCreateVisual( Display *display, 619 XVisualInfo * visinfo, 620 GLboolean rgb_flag, 621 GLboolean alpha_flag, 622 GLboolean db_flag, 623 GLboolean stereo_flag, 624 GLboolean ximage_flag, 625 GLint depth_size, 626 GLint stencil_size, 627 GLint accum_red_size, 628 GLint accum_green_size, 629 GLint accum_blue_size, 630 GLint accum_alpha_size, 631 GLint num_samples, 632 GLint level, 633 GLint visualCaveat ) 634{ 635 XMesaVisual v; 636 GLint red_bits, green_bits, blue_bits, alpha_bits; 637 638 /* For debugging only */ 639 if (_mesa_getenv("MESA_XSYNC")) { 640 /* This makes debugging X easier. 641 * In your debugger, set a breakpoint on _XError to stop when an 642 * X protocol error is generated. 643 */ 644 XSynchronize( display, 1 ); 645 } 646 647 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 648 if (!v) { 649 return NULL; 650 } 651 652 v->display = display; 653 654 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 655 * the struct but we may need some of the information contained in it 656 * at a later time. 657 */ 658 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 659 if(!v->visinfo) { 660 _mesa_free(v); 661 return NULL; 662 } 663 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 664 665 v->ximage_flag = ximage_flag; 666 667 v->mesa_visual.redMask = visinfo->red_mask; 668 v->mesa_visual.greenMask = visinfo->green_mask; 669 v->mesa_visual.blueMask = visinfo->blue_mask; 670 v->mesa_visual.visualID = visinfo->visualid; 671 v->mesa_visual.screen = visinfo->screen; 672 673#if !(defined(__cplusplus) || defined(c_plusplus)) 674 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 675#else 676 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 677#endif 678 679 v->mesa_visual.visualRating = visualCaveat; 680 681 if (alpha_flag) 682 v->mesa_visual.alphaBits = 8; 683 684 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 685 686 { 687 const int xclass = v->mesa_visual.visualType; 688 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 689 red_bits = _mesa_bitcount(GET_REDMASK(v)); 690 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 691 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 692 } 693 else { 694 /* this is an approximation */ 695 int depth; 696 depth = v->visinfo->depth; 697 red_bits = depth / 3; 698 depth -= red_bits; 699 green_bits = depth / 2; 700 depth -= green_bits; 701 blue_bits = depth; 702 alpha_bits = 0; 703 assert( red_bits + green_bits + blue_bits == v->visinfo->depth ); 704 } 705 alpha_bits = v->mesa_visual.alphaBits; 706 } 707 708 _mesa_initialize_visual( &v->mesa_visual, 709 rgb_flag, db_flag, stereo_flag, 710 red_bits, green_bits, 711 blue_bits, alpha_bits, 712 v->mesa_visual.indexBits, 713 depth_size, 714 stencil_size, 715 accum_red_size, accum_green_size, 716 accum_blue_size, accum_alpha_size, 717 0 ); 718 719 /* XXX minor hack */ 720 v->mesa_visual.level = level; 721 return v; 722} 723 724 725PUBLIC 726void XMesaDestroyVisual( XMesaVisual v ) 727{ 728 _mesa_free(v->visinfo); 729 _mesa_free(v); 730} 731 732 733 734/** 735 * Create a new XMesaContext. 736 * \param v the XMesaVisual 737 * \param share_list another XMesaContext with which to share display 738 * lists or NULL if no sharing is wanted. 739 * \return an XMesaContext or NULL if error. 740 */ 741PUBLIC 742XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 743{ 744 static GLboolean firstTime = GL_TRUE; 745 struct pipe_screen *screen; 746 struct pipe_context *pipe; 747 XMesaContext c; 748 GLcontext *mesaCtx; 749 uint pf; 750 751 if (firstTime) { 752 pipe_mutex_init(_xmesa_lock); 753 firstTime = GL_FALSE; 754 } 755 756 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 757 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 758 if (!c) 759 return NULL; 760 761 pf = choose_pixel_format(v); 762 assert(pf); 763 764 c->xm_visual = v; 765 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 766 767 /* XXX: create once per Xlib Display. 768 */ 769 screen = driver.create_pipe_screen(); 770 if (screen == NULL) 771 goto fail; 772 773 pipe = driver.create_pipe_context( screen, 774 (void *)c ); 775 if (pipe == NULL) 776 goto fail; 777 778 c->st = st_create_context(pipe, 779 &v->mesa_visual, 780 share_list ? share_list->st : NULL); 781 if (c->st == NULL) 782 goto fail; 783 784 mesaCtx = c->st->ctx; 785 c->st->ctx->DriverCtx = c; 786 787#if 00 788 _mesa_enable_sw_extensions(mesaCtx); 789 _mesa_enable_1_3_extensions(mesaCtx); 790 _mesa_enable_1_4_extensions(mesaCtx); 791 _mesa_enable_1_5_extensions(mesaCtx); 792 _mesa_enable_2_0_extensions(mesaCtx); 793#endif 794 795 return c; 796 797 fail: 798 if (c->st) 799 st_destroy_context(c->st); 800 else if (pipe) 801 pipe->destroy(pipe); 802 803 if (screen) 804 screen->destroy( screen ); 805 806 FREE(c); 807 return NULL; 808} 809 810 811 812PUBLIC 813void XMesaDestroyContext( XMesaContext c ) 814{ 815 st_destroy_context(c->st); 816 817 /* FIXME: We should destroy the screen here, but if we do so, surfaces may 818 * outlive it, causing segfaults 819 struct pipe_screen *screen = c->st->pipe->screen; 820 screen->destroy(screen); 821 */ 822 823 _mesa_free(c); 824} 825 826 827 828/** 829 * Private function for creating an XMesaBuffer which corresponds to an 830 * X window or pixmap. 831 * \param v the window's XMesaVisual 832 * \param w the window we're wrapping 833 * \return new XMesaBuffer or NULL if error 834 */ 835PUBLIC XMesaBuffer 836XMesaCreateWindowBuffer(XMesaVisual v, Window w) 837{ 838 XWindowAttributes attr; 839 XMesaBuffer b; 840 Colormap cmap; 841 int depth; 842 843 assert(v); 844 assert(w); 845 846 /* Check that window depth matches visual depth */ 847 XGetWindowAttributes( v->display, w, &attr ); 848 depth = attr.depth; 849 if (v->visinfo->depth != depth) { 850 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 851 v->visinfo->depth, depth); 852 return NULL; 853 } 854 855 /* Find colormap */ 856 if (attr.colormap) { 857 cmap = attr.colormap; 858 } 859 else { 860 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 861 /* this is weird, a window w/out a colormap!? */ 862 /* OK, let's just allocate a new one and hope for the best */ 863 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 864 } 865 866 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap); 867 if (!b) 868 return NULL; 869 870 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 871 (Drawable) w, cmap )) { 872 xmesa_free_buffer(b); 873 return NULL; 874 } 875 876 return b; 877} 878 879 880 881/** 882 * Create a new XMesaBuffer from an X pixmap. 883 * 884 * \param v the XMesaVisual 885 * \param p the pixmap 886 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 887 * \c GLX_DIRECT_COLOR visual for the pixmap 888 * \returns new XMesaBuffer or NULL if error 889 */ 890PUBLIC XMesaBuffer 891XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap) 892{ 893 XMesaBuffer b; 894 895 assert(v); 896 897 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 898 if (!b) 899 return NULL; 900 901 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 902 (Drawable) p, cmap)) { 903 xmesa_free_buffer(b); 904 return NULL; 905 } 906 907 return b; 908} 909 910 911/** 912 * For GLX_EXT_texture_from_pixmap 913 */ 914XMesaBuffer 915XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p, 916 Colormap cmap, 917 int format, int target, int mipmap) 918{ 919 GET_CURRENT_CONTEXT(ctx); 920 XMesaBuffer b; 921 GLuint width, height; 922 923 assert(v); 924 925 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 926 if (!b) 927 return NULL; 928 929 /* get pixmap size, update framebuffer/renderbuffer dims */ 930 xmesa_get_window_size(v->display, b, &width, &height); 931 _mesa_resize_framebuffer(NULL, &(b->stfb->Base), width, height); 932 933 if (target == 0) { 934 /* examine dims */ 935 if (ctx->Extensions.ARB_texture_non_power_of_two) { 936 target = GLX_TEXTURE_2D_EXT; 937 } 938 else if ( _mesa_bitcount(width) == 1 939 && _mesa_bitcount(height) == 1) { 940 /* power of two size */ 941 if (height == 1) { 942 target = GLX_TEXTURE_1D_EXT; 943 } 944 else { 945 target = GLX_TEXTURE_2D_EXT; 946 } 947 } 948 else if (ctx->Extensions.NV_texture_rectangle) { 949 target = GLX_TEXTURE_RECTANGLE_EXT; 950 } 951 else { 952 /* non power of two textures not supported */ 953 XMesaDestroyBuffer(b); 954 return 0; 955 } 956 } 957 958 b->TextureTarget = target; 959 b->TextureFormat = format; 960 b->TextureMipmap = mipmap; 961 962 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 963 (Drawable) p, cmap)) { 964 xmesa_free_buffer(b); 965 return NULL; 966 } 967 968 return b; 969} 970 971 972 973XMesaBuffer 974XMesaCreatePBuffer(XMesaVisual v, Colormap cmap, 975 unsigned int width, unsigned int height) 976{ 977 Window root; 978 Drawable drawable; /* X Pixmap Drawable */ 979 XMesaBuffer b; 980 981 /* allocate pixmap for front buffer */ 982 root = RootWindow( v->display, v->visinfo->screen ); 983 drawable = XCreatePixmap(v->display, root, width, height, 984 v->visinfo->depth); 985 if (!drawable) 986 return NULL; 987 988 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 989 if (!b) 990 return NULL; 991 992 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 993 drawable, cmap)) { 994 xmesa_free_buffer(b); 995 return NULL; 996 } 997 998 return b; 999} 1000 1001 1002 1003/* 1004 * Deallocate an XMesaBuffer structure and all related info. 1005 */ 1006PUBLIC void 1007XMesaDestroyBuffer(XMesaBuffer b) 1008{ 1009 xmesa_free_buffer(b); 1010} 1011 1012 1013/** 1014 * Query the current window size and update the corresponding GLframebuffer 1015 * and all attached renderbuffers. 1016 * Called when: 1017 * 1. the first time a buffer is bound to a context. 1018 * 2. SwapBuffers. XXX probabaly from xm_flush_frontbuffer() too... 1019 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1020 * when resizing a buffer when no rendering context is bound. 1021 */ 1022void 1023xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1024{ 1025 GLuint width, height; 1026 xmesa_get_window_size(drawBuffer->xm_visual->display, drawBuffer, &width, &height); 1027 st_resize_framebuffer(drawBuffer->stfb, width, height); 1028} 1029 1030 1031 1032 1033/* 1034 * Bind buffer b to context c and make c the current rendering context. 1035 */ 1036PUBLIC 1037GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1038 XMesaBuffer readBuffer ) 1039{ 1040 if (c) { 1041 if (!drawBuffer || !readBuffer) 1042 return GL_FALSE; /* must specify buffers! */ 1043 1044#if 0 1045 /* XXX restore this optimization */ 1046 if (&(c->mesa) == _mesa_get_current_context() 1047 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1048 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1049 && xmesa_buffer(c->mesa.DrawBuffer)->wasCurrent) { 1050 /* same context and buffer, do nothing */ 1051 return GL_TRUE; 1052 } 1053#endif 1054 1055 c->xm_buffer = drawBuffer; 1056 1057 /* Call this periodically to detect when the user has begun using 1058 * GL rendering from multiple threads. 1059 */ 1060 _glapi_check_multithread(); 1061 1062 st_make_current(c->st, drawBuffer->stfb, readBuffer->stfb); 1063 1064 xmesa_check_and_update_buffer_size(c, drawBuffer); 1065 if (readBuffer != drawBuffer) 1066 xmesa_check_and_update_buffer_size(c, readBuffer); 1067 1068 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1069 drawBuffer->wasCurrent = GL_TRUE; 1070 } 1071 else { 1072 /* Detach */ 1073 st_make_current( NULL, NULL, NULL ); 1074 } 1075 return GL_TRUE; 1076} 1077 1078 1079/* 1080 * Unbind the context c from its buffer. 1081 */ 1082GLboolean XMesaUnbindContext( XMesaContext c ) 1083{ 1084 /* A no-op for XFree86 integration purposes */ 1085 return GL_TRUE; 1086} 1087 1088 1089XMesaContext XMesaGetCurrentContext( void ) 1090{ 1091 GET_CURRENT_CONTEXT(ctx); 1092 if (ctx) { 1093 XMesaContext xmesa = xmesa_context(ctx); 1094 return xmesa; 1095 } 1096 else { 1097 return 0; 1098 } 1099} 1100 1101 1102 1103 1104 1105 1106/* 1107 * Copy the back buffer to the front buffer. If there's no back buffer 1108 * this is a no-op. 1109 */ 1110PUBLIC 1111void XMesaSwapBuffers( XMesaBuffer b ) 1112{ 1113 struct pipe_surface *surf; 1114 1115 /* If we're swapping the buffer associated with the current context 1116 * we have to flush any pending rendering commands first. 1117 */ 1118 st_notify_swapbuffers(b->stfb); 1119 1120 st_get_framebuffer_surface(b->stfb, ST_SURFACE_BACK_LEFT, &surf); 1121 if (surf) { 1122 driver.display_surface(b, surf); 1123 } 1124 1125 xmesa_check_and_update_buffer_size(NULL, b); 1126} 1127 1128 1129 1130/* 1131 * Copy sub-region of back buffer to front buffer 1132 */ 1133void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1134{ 1135 struct pipe_surface *surf_front; 1136 struct pipe_surface *surf_back; 1137 struct pipe_context *pipe = NULL; /* XXX fix */ 1138 1139 st_get_framebuffer_surface(b->stfb, ST_SURFACE_FRONT_LEFT, &surf_front); 1140 st_get_framebuffer_surface(b->stfb, ST_SURFACE_BACK_LEFT, &surf_back); 1141 1142 if (!surf_front || !surf_back) 1143 return; 1144 1145 pipe->surface_copy(pipe, 1146 FALSE, 1147 surf_front, x, y, /* dest */ 1148 surf_back, x, y, /* src */ 1149 width, height); 1150} 1151 1152 1153 1154void XMesaFlush( XMesaContext c ) 1155{ 1156 if (c && c->xm_visual->display) { 1157 st_finish(c->st); 1158 XSync( c->xm_visual->display, False ); 1159 } 1160} 1161 1162 1163 1164 1165 1166XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d ) 1167{ 1168 XMesaBuffer b; 1169 for (b=XMesaBufferList; b; b=b->Next) { 1170 if (b->drawable == d && b->xm_visual->display == dpy) { 1171 return b; 1172 } 1173 } 1174 return NULL; 1175} 1176 1177 1178/** 1179 * Free/destroy all XMesaBuffers associated with given display. 1180 */ 1181void xmesa_destroy_buffers_on_display(Display *dpy) 1182{ 1183 XMesaBuffer b, next; 1184 for (b = XMesaBufferList; b; b = next) { 1185 next = b->Next; 1186 if (b->xm_visual->display == dpy) { 1187 xmesa_free_buffer(b); 1188 } 1189 } 1190} 1191 1192 1193/* 1194 * Look for XMesaBuffers whose X window has been destroyed. 1195 * Deallocate any such XMesaBuffers. 1196 */ 1197void XMesaGarbageCollect( void ) 1198{ 1199 XMesaBuffer b, next; 1200 for (b=XMesaBufferList; b; b=next) { 1201 next = b->Next; 1202 if (b->xm_visual && 1203 b->xm_visual->display && 1204 b->drawable && 1205 b->type == WINDOW) { 1206 XSync(b->xm_visual->display, False); 1207 if (!window_exists( b->xm_visual->display, b->drawable )) { 1208 /* found a dead window, free the ancillary info */ 1209 XMesaDestroyBuffer( b ); 1210 } 1211 } 1212 } 1213} 1214 1215 1216 1217 1218PUBLIC void 1219XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer, 1220 const int *attrib_list) 1221{ 1222} 1223 1224 1225 1226PUBLIC void 1227XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer) 1228{ 1229} 1230 1231