xm_api.c revision 298be2b028263b2c343a707662c6fbfa18293cb2
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 "trace/tr_screen.h" 71#include "trace/tr_context.h" 72#include "trace/tr_texture.h" 73 74#include "xm_winsys.h" 75#include <GL/glx.h> 76 77 78/* Driver interface routines, set up by xlib backend on library 79 * _init(). These are global in the same way that function names are 80 * global. 81 */ 82static struct xm_driver driver; 83 84void xmesa_set_driver( const struct xm_driver *templ ) 85{ 86 driver = *templ; 87} 88 89/** 90 * Global X driver lock 91 */ 92pipe_mutex _xmesa_lock; 93 94static struct pipe_screen *_screen = NULL; 95static struct pipe_screen *screen = NULL; 96 97 98/**********************************************************************/ 99/***** X Utility Functions *****/ 100/**********************************************************************/ 101 102 103/** 104 * Return the host's byte order as LSBFirst or MSBFirst ala X. 105 */ 106static int host_byte_order( void ) 107{ 108 int i = 1; 109 char *cptr = (char *) &i; 110 return (*cptr==1) ? LSBFirst : MSBFirst; 111} 112 113 114/** 115 * Check if the X Shared Memory extension is available. 116 * Return: 0 = not available 117 * 1 = shared XImage support available 118 * 2 = shared Pixmap support available also 119 */ 120int xmesa_check_for_xshm( Display *display ) 121{ 122#if defined(USE_XSHM) 123 int major, minor, ignore; 124 Bool pixmaps; 125 126 if (getenv("SP_NO_RAST")) 127 return 0; 128 129 if (getenv("MESA_NOSHM")) { 130 return 0; 131 } 132 133 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 134 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 135 return (pixmaps==True) ? 2 : 1; 136 } 137 else { 138 return 0; 139 } 140 } 141 else { 142 return 0; 143 } 144#else 145 /* No XSHM support */ 146 return 0; 147#endif 148} 149 150 151/** 152 * Return the true number of bits per pixel for XImages. 153 * For example, if we request a 24-bit deep visual we may actually need/get 154 * 32bpp XImages. This function returns the appropriate bpp. 155 * Input: dpy - the X display 156 * visinfo - desribes the visual to be used for XImages 157 * Return: true number of bits per pixel for XImages 158 */ 159static int 160bits_per_pixel( XMesaVisual xmv ) 161{ 162 Display *dpy = xmv->display; 163 XVisualInfo * visinfo = xmv->visinfo; 164 XImage *img; 165 int bitsPerPixel; 166 /* Create a temporary XImage */ 167 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 168 ZPixmap, 0, /*format, offset*/ 169 (char*) MALLOC(8), /*data*/ 170 1, 1, /*width, height*/ 171 32, /*bitmap_pad*/ 172 0 /*bytes_per_line*/ 173 ); 174 assert(img); 175 /* grab the bits/pixel value */ 176 bitsPerPixel = img->bits_per_pixel; 177 /* free the XImage */ 178 free( img->data ); 179 img->data = NULL; 180 XDestroyImage( img ); 181 return bitsPerPixel; 182} 183 184 185 186/* 187 * Determine if a given X window ID is valid (window exists). 188 * Do this by calling XGetWindowAttributes() for the window and 189 * checking if we catch an X error. 190 * Input: dpy - the display 191 * win - the window to check for existance 192 * Return: GL_TRUE - window exists 193 * GL_FALSE - window doesn't exist 194 */ 195static GLboolean WindowExistsFlag; 196 197static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr ) 198{ 199 (void) dpy; 200 if (xerr->error_code == BadWindow) { 201 WindowExistsFlag = GL_FALSE; 202 } 203 return 0; 204} 205 206static GLboolean window_exists( Display *dpy, Window win ) 207{ 208 XWindowAttributes wa; 209 int (*old_handler)( Display*, XErrorEvent* ); 210 WindowExistsFlag = GL_TRUE; 211 old_handler = XSetErrorHandler(window_exists_err_handler); 212 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 213 XSetErrorHandler(old_handler); 214 return WindowExistsFlag; 215} 216 217static Status 218get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height ) 219{ 220 Window root; 221 Status stat; 222 int xpos, ypos; 223 unsigned int w, h, bw, depth; 224 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 225 *width = w; 226 *height = h; 227 return stat; 228} 229 230 231/** 232 * Return the size of the window (or pixmap) that corresponds to the 233 * given XMesaBuffer. 234 * \param width returns width in pixels 235 * \param height returns height in pixels 236 */ 237void 238xmesa_get_window_size(Display *dpy, XMesaBuffer b, 239 GLuint *width, GLuint *height) 240{ 241 Status stat; 242 243 pipe_mutex_lock(_xmesa_lock); 244 XSync(b->xm_visual->display, 0); /* added for Chromium */ 245 stat = get_drawable_size(dpy, b->drawable, width, height); 246 pipe_mutex_unlock(_xmesa_lock); 247 248 if (!stat) { 249 /* probably querying a window that's recently been destroyed */ 250 _mesa_warning(NULL, "XGetGeometry failed!\n"); 251 *width = *height = 1; 252 } 253} 254 255#define GET_REDMASK(__v) __v->mesa_visual.redMask 256#define GET_GREENMASK(__v) __v->mesa_visual.greenMask 257#define GET_BLUEMASK(__v) __v->mesa_visual.blueMask 258 259 260/** 261 * Choose the pixel format for the given visual. 262 * This will tell the gallium driver how to pack pixel data into 263 * drawing surfaces. 264 */ 265static GLuint 266choose_pixel_format(XMesaVisual v) 267{ 268 boolean native_byte_order = (host_byte_order() == 269 ImageByteOrder(v->display)); 270 271 if ( GET_REDMASK(v) == 0x0000ff 272 && GET_GREENMASK(v) == 0x00ff00 273 && GET_BLUEMASK(v) == 0xff0000 274 && v->BitsPerPixel == 32) { 275 if (native_byte_order) { 276 /* no byteswapping needed */ 277 return 0 /* PIXEL_FORMAT_U_A8_B8_G8_R8 */; 278 } 279 else { 280 return PIPE_FORMAT_R8G8B8A8_UNORM; 281 } 282 } 283 else if ( GET_REDMASK(v) == 0xff0000 284 && GET_GREENMASK(v) == 0x00ff00 285 && GET_BLUEMASK(v) == 0x0000ff 286 && v->BitsPerPixel == 32) { 287 if (native_byte_order) { 288 /* no byteswapping needed */ 289 return PIPE_FORMAT_A8R8G8B8_UNORM; 290 } 291 else { 292 return PIPE_FORMAT_B8G8R8A8_UNORM; 293 } 294 } 295 else if ( GET_REDMASK(v) == 0x0000ff00 296 && GET_GREENMASK(v) == 0x00ff0000 297 && GET_BLUEMASK(v) == 0xff000000 298 && v->BitsPerPixel == 32) { 299 if (native_byte_order) { 300 /* no byteswapping needed */ 301 return PIPE_FORMAT_B8G8R8A8_UNORM; 302 } 303 else { 304 return PIPE_FORMAT_A8R8G8B8_UNORM; 305 } 306 } 307 else if ( GET_REDMASK(v) == 0xf800 308 && GET_GREENMASK(v) == 0x07e0 309 && GET_BLUEMASK(v) == 0x001f 310 && native_byte_order 311 && v->BitsPerPixel == 16) { 312 /* 5-6-5 RGB */ 313 return PIPE_FORMAT_R5G6B5_UNORM; 314 } 315 316 assert(0); 317 return 0; 318} 319 320 321 322/**********************************************************************/ 323/***** Linked list of XMesaBuffers *****/ 324/**********************************************************************/ 325 326XMesaBuffer XMesaBufferList = NULL; 327 328 329/** 330 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 331 * Note that XMesaBuffer is derived from GLframebuffer. 332 * The new XMesaBuffer will not have any size (Width=Height=0). 333 * 334 * \param d the corresponding X drawable (window or pixmap) 335 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 336 * \param vis the buffer's visual 337 * \param cmap the window's colormap, if known. 338 * \return new XMesaBuffer or NULL if any problem 339 */ 340static XMesaBuffer 341create_xmesa_buffer(Drawable d, BufferType type, 342 XMesaVisual vis, Colormap cmap) 343{ 344 XMesaBuffer b; 345 GLframebuffer *fb; 346 enum pipe_format colorFormat, depthFormat, stencilFormat; 347 uint width, height; 348 349 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 350 351 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 352 if (!b) 353 return NULL; 354 355 b->drawable = d; 356 357 b->xm_visual = vis; 358 b->type = type; 359 b->cmap = cmap; 360 361 /* determine PIPE_FORMATs for buffers */ 362 colorFormat = choose_pixel_format(vis); 363 364 if (vis->mesa_visual.depthBits == 0) 365 depthFormat = PIPE_FORMAT_NONE; 366#ifdef GALLIUM_CELL /* XXX temporary for Cell! */ 367 else 368 depthFormat = PIPE_FORMAT_S8Z24_UNORM; 369#else 370 else if (vis->mesa_visual.depthBits <= 16) 371 depthFormat = PIPE_FORMAT_Z16_UNORM; 372 else if (vis->mesa_visual.depthBits <= 24) 373 depthFormat = PIPE_FORMAT_S8Z24_UNORM; 374 else 375 depthFormat = PIPE_FORMAT_Z32_UNORM; 376#endif 377 378 if (vis->mesa_visual.stencilBits == 8) { 379 if (depthFormat == PIPE_FORMAT_S8Z24_UNORM) 380 stencilFormat = depthFormat; 381 else 382 stencilFormat = PIPE_FORMAT_S8_UNORM; 383 } 384 else { 385 /* no stencil */ 386 stencilFormat = PIPE_FORMAT_NONE; 387 if (depthFormat == PIPE_FORMAT_S8Z24_UNORM) { 388 /* use 24-bit Z, undefined stencil channel */ 389 depthFormat = PIPE_FORMAT_X8Z24_UNORM; 390 } 391 } 392 393 394 get_drawable_size(vis->display, d, &width, &height); 395 396 /* 397 * Create framebuffer, but we'll plug in our own renderbuffers below. 398 */ 399 b->stfb = st_create_framebuffer(&vis->mesa_visual, 400 colorFormat, depthFormat, stencilFormat, 401 width, height, 402 (void *) b); 403 fb = &b->stfb->Base; 404 405 /* 406 * Create scratch XImage for xmesa_display_surface() 407 */ 408 b->tempImage = XCreateImage(vis->display, 409 vis->visinfo->visual, 410 vis->visinfo->depth, 411 ZPixmap, 0, /* format, offset */ 412 NULL, /* data */ 413 0, 0, /* size */ 414 32, /* bitmap_pad */ 415 0); /* bytes_per_line */ 416 417 /* GLX_EXT_texture_from_pixmap */ 418 b->TextureTarget = 0; 419 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 420 b->TextureMipmap = 0; 421 422 /* insert buffer into linked list */ 423 b->Next = XMesaBufferList; 424 XMesaBufferList = b; 425 426 return b; 427} 428 429 430/** 431 * Find an XMesaBuffer by matching X display and colormap but NOT matching 432 * the notThis buffer. 433 */ 434XMesaBuffer 435xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis) 436{ 437 XMesaBuffer b; 438 for (b = XMesaBufferList; b; b = b->Next) { 439 if (b->xm_visual->display == dpy && 440 b->cmap == cmap && 441 b != notThis) { 442 return b; 443 } 444 } 445 return NULL; 446} 447 448 449/** 450 * Remove buffer from linked list, delete if no longer referenced. 451 */ 452static void 453xmesa_free_buffer(XMesaBuffer buffer) 454{ 455 XMesaBuffer prev = NULL, b; 456 457 for (b = XMesaBufferList; b; b = b->Next) { 458 if (b == buffer) { 459 struct gl_framebuffer *fb = &buffer->stfb->Base; 460 461 /* unlink buffer from list */ 462 if (prev) 463 prev->Next = buffer->Next; 464 else 465 XMesaBufferList = buffer->Next; 466 467 /* mark as delete pending */ 468 fb->DeletePending = GL_TRUE; 469 470 /* Since the X window for the XMesaBuffer is going away, we don't 471 * want to dereference this pointer in the future. 472 */ 473 b->drawable = 0; 474 475 buffer->tempImage->data = NULL; 476 XDestroyImage(buffer->tempImage); 477 478 /* Unreference. If count = zero we'll really delete the buffer */ 479 _mesa_reference_framebuffer(&fb, NULL); 480 481 XFreeGC(b->xm_visual->display, b->gc); 482 483 free(buffer); 484 485 return; 486 } 487 /* continue search */ 488 prev = b; 489 } 490 /* buffer not found in XMesaBufferList */ 491 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 492} 493 494 495 496/**********************************************************************/ 497/***** Misc Private Functions *****/ 498/**********************************************************************/ 499 500 501/** 502 * When a context is bound for the first time, we can finally finish 503 * initializing the context's visual and buffer information. 504 * \param v the XMesaVisual to initialize 505 * \param b the XMesaBuffer to initialize (may be NULL) 506 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 507 * \param window the window/pixmap we're rendering into 508 * \param cmap the colormap associated with the window/pixmap 509 * \return GL_TRUE=success, GL_FALSE=failure 510 */ 511static GLboolean 512initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 513 GLboolean rgb_flag, Drawable window, 514 Colormap cmap) 515{ 516 ASSERT(!b || b->xm_visual == v); 517 518 /* Save true bits/pixel */ 519 v->BitsPerPixel = bits_per_pixel(v); 520 assert(v->BitsPerPixel > 0); 521 522 if (rgb_flag == GL_FALSE) { 523 /* COLOR-INDEXED WINDOW: not supported*/ 524 return GL_FALSE; 525 } 526 else { 527 /* RGB WINDOW: 528 * We support RGB rendering into almost any kind of visual. 529 */ 530 const int xclass = v->mesa_visual.visualType; 531 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) { 532 _mesa_warning(NULL, 533 "XMesa: RGB mode rendering not supported in given visual.\n"); 534 return GL_FALSE; 535 } 536 v->mesa_visual.indexBits = 0; 537 538 if (v->BitsPerPixel == 32) { 539 /* We use XImages for all front/back buffers. If an X Window or 540 * X Pixmap is 32bpp, there's no guarantee that the alpha channel 541 * will be preserved. For XImages we're in luck. 542 */ 543 v->mesa_visual.alphaBits = 8; 544 } 545 } 546 547 /* 548 * If MESA_INFO env var is set print out some debugging info 549 * which can help Brian figure out what's going on when a user 550 * reports bugs. 551 */ 552 if (_mesa_getenv("MESA_INFO")) { 553 printf("X/Mesa visual = %p\n", (void *) v); 554 printf("X/Mesa level = %d\n", v->mesa_visual.level); 555 printf("X/Mesa depth = %d\n", v->visinfo->depth); 556 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 557 } 558 559 if (b && window) { 560 /* these should have been set in create_xmesa_buffer */ 561 ASSERT(b->drawable == window); 562 563 /* Setup for single/double buffering */ 564 if (v->mesa_visual.doubleBufferMode) { 565 /* Double buffered */ 566 b->shm = xmesa_check_for_xshm( v->display ); 567 } 568 569 /* X11 graphics context */ 570 b->gc = XCreateGC( v->display, window, 0, NULL ); 571 XSetFunction( v->display, b->gc, GXcopy ); 572 } 573 574 return GL_TRUE; 575} 576 577 578 579#define NUM_VISUAL_TYPES 6 580 581/** 582 * Convert an X visual type to a GLX visual type. 583 * 584 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 585 * to be converted. 586 * \return If \c visualType is a valid X visual type, a GLX visual type will 587 * be returned. Otherwise \c GLX_NONE will be returned. 588 * 589 * \note 590 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 591 * DRI CVS tree. 592 */ 593static GLint 594xmesa_convert_from_x_visual_type( int visualType ) 595{ 596 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 597 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 598 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 599 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 600 }; 601 602 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 603 ? glx_visual_types[ visualType ] : GLX_NONE; 604} 605 606 607/**********************************************************************/ 608/***** Public Functions *****/ 609/**********************************************************************/ 610 611 612/* 613 * Create a new X/Mesa visual. 614 * Input: display - X11 display 615 * visinfo - an XVisualInfo pointer 616 * rgb_flag - GL_TRUE = RGB mode, 617 * GL_FALSE = color index mode 618 * alpha_flag - alpha buffer requested? 619 * db_flag - GL_TRUE = double-buffered, 620 * GL_FALSE = single buffered 621 * stereo_flag - stereo visual? 622 * ximage_flag - GL_TRUE = use an XImage for back buffer, 623 * GL_FALSE = use an off-screen pixmap for back buffer 624 * depth_size - requested bits/depth values, or zero 625 * stencil_size - requested bits/stencil values, or zero 626 * accum_red_size - requested bits/red accum values, or zero 627 * accum_green_size - requested bits/green accum values, or zero 628 * accum_blue_size - requested bits/blue accum values, or zero 629 * accum_alpha_size - requested bits/alpha accum values, or zero 630 * num_samples - number of samples/pixel if multisampling, or zero 631 * level - visual level, usually 0 632 * visualCaveat - ala the GLX extension, usually GLX_NONE 633 * Return; a new XMesaVisual or 0 if error. 634 */ 635PUBLIC 636XMesaVisual XMesaCreateVisual( Display *display, 637 XVisualInfo * visinfo, 638 GLboolean rgb_flag, 639 GLboolean alpha_flag, 640 GLboolean db_flag, 641 GLboolean stereo_flag, 642 GLboolean ximage_flag, 643 GLint depth_size, 644 GLint stencil_size, 645 GLint accum_red_size, 646 GLint accum_green_size, 647 GLint accum_blue_size, 648 GLint accum_alpha_size, 649 GLint num_samples, 650 GLint level, 651 GLint visualCaveat ) 652{ 653 XMesaVisual v; 654 GLint red_bits, green_bits, blue_bits, alpha_bits; 655 656 /* For debugging only */ 657 if (_mesa_getenv("MESA_XSYNC")) { 658 /* This makes debugging X easier. 659 * In your debugger, set a breakpoint on _XError to stop when an 660 * X protocol error is generated. 661 */ 662 XSynchronize( display, 1 ); 663 } 664 665 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 666 if (!v) { 667 return NULL; 668 } 669 670 v->display = display; 671 672 /* Save a copy of the XVisualInfo struct because the user may Xfree() 673 * the struct but we may need some of the information contained in it 674 * at a later time. 675 */ 676 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 677 if (!v->visinfo) { 678 free(v); 679 return NULL; 680 } 681 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 682 683 v->ximage_flag = ximage_flag; 684 685 v->mesa_visual.redMask = visinfo->red_mask; 686 v->mesa_visual.greenMask = visinfo->green_mask; 687 v->mesa_visual.blueMask = visinfo->blue_mask; 688 v->mesa_visual.visualID = visinfo->visualid; 689 v->mesa_visual.screen = visinfo->screen; 690 691#if !(defined(__cplusplus) || defined(c_plusplus)) 692 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 693#else 694 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 695#endif 696 697 v->mesa_visual.visualRating = visualCaveat; 698 699 if (alpha_flag) 700 v->mesa_visual.alphaBits = 8; 701 702 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 703 704 { 705 const int xclass = v->mesa_visual.visualType; 706 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 707 red_bits = _mesa_bitcount(GET_REDMASK(v)); 708 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 709 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 710 } 711 else { 712 /* this is an approximation */ 713 int depth; 714 depth = v->visinfo->depth; 715 red_bits = depth / 3; 716 depth -= red_bits; 717 green_bits = depth / 2; 718 depth -= green_bits; 719 blue_bits = depth; 720 alpha_bits = 0; 721 assert( red_bits + green_bits + blue_bits == v->visinfo->depth ); 722 } 723 alpha_bits = v->mesa_visual.alphaBits; 724 } 725 726 _mesa_initialize_visual( &v->mesa_visual, 727 rgb_flag, db_flag, stereo_flag, 728 red_bits, green_bits, 729 blue_bits, alpha_bits, 730 v->mesa_visual.indexBits, 731 depth_size, 732 stencil_size, 733 accum_red_size, accum_green_size, 734 accum_blue_size, accum_alpha_size, 735 0 ); 736 737 /* XXX minor hack */ 738 v->mesa_visual.level = level; 739 return v; 740} 741 742 743PUBLIC 744void XMesaDestroyVisual( XMesaVisual v ) 745{ 746 free(v->visinfo); 747 free(v); 748} 749 750 751 752/** 753 * Create a new XMesaContext. 754 * \param v the XMesaVisual 755 * \param share_list another XMesaContext with which to share display 756 * lists or NULL if no sharing is wanted. 757 * \return an XMesaContext or NULL if error. 758 */ 759PUBLIC 760XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 761{ 762 static GLboolean firstTime = GL_TRUE; 763 struct pipe_context *pipe = NULL; 764 XMesaContext c; 765 GLcontext *mesaCtx; 766 uint pf; 767 768 if (firstTime) { 769 pipe_mutex_init(_xmesa_lock); 770 _screen = driver.create_pipe_screen(); 771 screen = trace_screen_create( _screen ); 772 firstTime = GL_FALSE; 773 } 774 775 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 776 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 777 if (!c) 778 return NULL; 779 780 pf = choose_pixel_format(v); 781 assert(pf); 782 783 c->xm_visual = v; 784 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 785 c->xm_read_buffer = NULL; 786 787 if (screen == NULL) 788 goto fail; 789 790 /* Trace screen knows how to properly wrap context creation in the 791 * wrapped screen, so nothing special to do here: 792 */ 793 pipe = screen->context_create(screen, (void *) c); 794 if (pipe == NULL) 795 goto fail; 796 797 c->st = st_create_context(pipe, 798 &v->mesa_visual, 799 share_list ? share_list->st : NULL); 800 if (c->st == NULL) 801 goto fail; 802 803 mesaCtx = c->st->ctx; 804 c->st->ctx->DriverCtx = c; 805 806 return c; 807 808fail: 809 if (c->st) 810 st_destroy_context(c->st); 811 else if (pipe) 812 pipe->destroy(pipe); 813 814 free(c); 815 return NULL; 816} 817 818 819 820PUBLIC 821void XMesaDestroyContext( XMesaContext c ) 822{ 823 st_destroy_context(c->st); 824 825 /* FIXME: We should destroy the screen here, but if we do so, surfaces may 826 * outlive it, causing segfaults 827 struct pipe_screen *screen = c->st->pipe->screen; 828 screen->destroy(screen); 829 */ 830 831 free(c); 832} 833 834 835 836/** 837 * Private function for creating an XMesaBuffer which corresponds to an 838 * X window or pixmap. 839 * \param v the window's XMesaVisual 840 * \param w the window we're wrapping 841 * \return new XMesaBuffer or NULL if error 842 */ 843PUBLIC XMesaBuffer 844XMesaCreateWindowBuffer(XMesaVisual v, Window w) 845{ 846 XWindowAttributes attr; 847 XMesaBuffer b; 848 Colormap cmap; 849 int depth; 850 851 assert(v); 852 assert(w); 853 854 /* Check that window depth matches visual depth */ 855 XGetWindowAttributes( v->display, w, &attr ); 856 depth = attr.depth; 857 if (v->visinfo->depth != depth) { 858 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 859 v->visinfo->depth, depth); 860 return NULL; 861 } 862 863 /* Find colormap */ 864 if (attr.colormap) { 865 cmap = attr.colormap; 866 } 867 else { 868 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 869 /* this is weird, a window w/out a colormap!? */ 870 /* OK, let's just allocate a new one and hope for the best */ 871 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 872 } 873 874 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap); 875 if (!b) 876 return NULL; 877 878 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 879 (Drawable) w, cmap )) { 880 xmesa_free_buffer(b); 881 return NULL; 882 } 883 884 return b; 885} 886 887 888 889/** 890 * Create a new XMesaBuffer from an X pixmap. 891 * 892 * \param v the XMesaVisual 893 * \param p the pixmap 894 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 895 * \c GLX_DIRECT_COLOR visual for the pixmap 896 * \returns new XMesaBuffer or NULL if error 897 */ 898PUBLIC XMesaBuffer 899XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap) 900{ 901 XMesaBuffer b; 902 903 assert(v); 904 905 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 906 if (!b) 907 return NULL; 908 909 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 910 (Drawable) p, cmap)) { 911 xmesa_free_buffer(b); 912 return NULL; 913 } 914 915 return b; 916} 917 918 919/** 920 * For GLX_EXT_texture_from_pixmap 921 */ 922XMesaBuffer 923XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p, 924 Colormap cmap, 925 int format, int target, int mipmap) 926{ 927 GET_CURRENT_CONTEXT(ctx); 928 XMesaBuffer b; 929 GLuint width, height; 930 931 assert(v); 932 933 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 934 if (!b) 935 return NULL; 936 937 /* get pixmap size, update framebuffer/renderbuffer dims */ 938 xmesa_get_window_size(v->display, b, &width, &height); 939 _mesa_resize_framebuffer(NULL, &(b->stfb->Base), width, height); 940 941 if (target == 0) { 942 /* examine dims */ 943 if (ctx->Extensions.ARB_texture_non_power_of_two) { 944 target = GLX_TEXTURE_2D_EXT; 945 } 946 else if ( _mesa_bitcount(width) == 1 947 && _mesa_bitcount(height) == 1) { 948 /* power of two size */ 949 if (height == 1) { 950 target = GLX_TEXTURE_1D_EXT; 951 } 952 else { 953 target = GLX_TEXTURE_2D_EXT; 954 } 955 } 956 else if (ctx->Extensions.NV_texture_rectangle) { 957 target = GLX_TEXTURE_RECTANGLE_EXT; 958 } 959 else { 960 /* non power of two textures not supported */ 961 XMesaDestroyBuffer(b); 962 return 0; 963 } 964 } 965 966 b->TextureTarget = target; 967 b->TextureFormat = format; 968 b->TextureMipmap = mipmap; 969 970 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 971 (Drawable) p, cmap)) { 972 xmesa_free_buffer(b); 973 return NULL; 974 } 975 976 return b; 977} 978 979 980 981XMesaBuffer 982XMesaCreatePBuffer(XMesaVisual v, Colormap cmap, 983 unsigned int width, unsigned int height) 984{ 985 Window root; 986 Drawable drawable; /* X Pixmap Drawable */ 987 XMesaBuffer b; 988 989 /* allocate pixmap for front buffer */ 990 root = RootWindow( v->display, v->visinfo->screen ); 991 drawable = XCreatePixmap(v->display, root, width, height, 992 v->visinfo->depth); 993 if (!drawable) 994 return NULL; 995 996 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 997 if (!b) 998 return NULL; 999 1000 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1001 drawable, cmap)) { 1002 xmesa_free_buffer(b); 1003 return NULL; 1004 } 1005 1006 return b; 1007} 1008 1009 1010 1011/* 1012 * Deallocate an XMesaBuffer structure and all related info. 1013 */ 1014PUBLIC void 1015XMesaDestroyBuffer(XMesaBuffer b) 1016{ 1017 xmesa_free_buffer(b); 1018} 1019 1020 1021/** 1022 * Query the current window size and update the corresponding GLframebuffer 1023 * and all attached renderbuffers. 1024 * Called when: 1025 * 1. the first time a buffer is bound to a context. 1026 * 2. SwapBuffers. XXX probabaly from xm_flush_frontbuffer() too... 1027 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1028 * when resizing a buffer when no rendering context is bound. 1029 */ 1030void 1031xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1032{ 1033 GLuint width, height; 1034 xmesa_get_window_size(drawBuffer->xm_visual->display, drawBuffer, &width, &height); 1035 st_resize_framebuffer(drawBuffer->stfb, width, height); 1036} 1037 1038 1039 1040 1041/* 1042 * Bind buffer b to context c and make c the current rendering context. 1043 */ 1044PUBLIC 1045GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1046 XMesaBuffer readBuffer ) 1047{ 1048 XMesaContext old_ctx = XMesaGetCurrentContext(); 1049 1050 if (old_ctx && old_ctx != c) { 1051 XMesaFlush(old_ctx); 1052 old_ctx->xm_buffer = NULL; 1053 old_ctx->xm_read_buffer = NULL; 1054 } 1055 1056 if (c) { 1057 if (!drawBuffer || !readBuffer) 1058 return GL_FALSE; /* must specify buffers! */ 1059 1060 if (c == old_ctx && 1061 c->xm_buffer == drawBuffer && 1062 c->xm_read_buffer == readBuffer) 1063 return GL_TRUE; 1064 1065 c->xm_buffer = drawBuffer; 1066 c->xm_read_buffer = readBuffer; 1067 1068 st_make_current(c->st, drawBuffer->stfb, readBuffer->stfb); 1069 1070 xmesa_check_and_update_buffer_size(c, drawBuffer); 1071 if (readBuffer != drawBuffer) 1072 xmesa_check_and_update_buffer_size(c, readBuffer); 1073 1074 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1075 drawBuffer->wasCurrent = GL_TRUE; 1076 } 1077 else { 1078 /* Detach */ 1079 st_make_current( NULL, NULL, NULL ); 1080 1081 } 1082 return GL_TRUE; 1083} 1084 1085 1086/* 1087 * Unbind the context c from its buffer. 1088 */ 1089GLboolean XMesaUnbindContext( XMesaContext c ) 1090{ 1091 /* A no-op for XFree86 integration purposes */ 1092 return GL_TRUE; 1093} 1094 1095 1096XMesaContext XMesaGetCurrentContext( void ) 1097{ 1098 GET_CURRENT_CONTEXT(ctx); 1099 if (ctx) { 1100 XMesaContext xmesa = xmesa_context(ctx); 1101 return xmesa; 1102 } 1103 else { 1104 return 0; 1105 } 1106} 1107 1108 1109 1110/** 1111 * Swap front and back color buffers and have winsys display front buffer. 1112 * If there's no front color buffer no swap actually occurs. 1113 */ 1114PUBLIC 1115void XMesaSwapBuffers( XMesaBuffer b ) 1116{ 1117 struct pipe_surface *frontLeftSurf; 1118 1119 st_swapbuffers(b->stfb, &frontLeftSurf, NULL); 1120 1121 if (frontLeftSurf) { 1122 if (_screen != screen) { 1123 struct trace_surface *tr_surf = trace_surface( frontLeftSurf ); 1124 struct pipe_surface *surf = tr_surf->surface; 1125 frontLeftSurf = surf; 1126 } 1127 1128 driver.display_surface(b, frontLeftSurf); 1129 } 1130 1131 xmesa_check_and_update_buffer_size(NULL, b); 1132} 1133 1134 1135 1136/* 1137 * Copy sub-region of back buffer to front buffer 1138 */ 1139void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1140{ 1141 struct pipe_surface *surf_front; 1142 struct pipe_surface *surf_back; 1143 struct pipe_context *pipe = NULL; /* XXX fix */ 1144 1145 st_get_framebuffer_surface(b->stfb, ST_SURFACE_FRONT_LEFT, &surf_front); 1146 st_get_framebuffer_surface(b->stfb, ST_SURFACE_BACK_LEFT, &surf_back); 1147 1148 if (!surf_front || !surf_back) 1149 return; 1150 1151 pipe->surface_copy(pipe, 1152 surf_front, x, y, /* dest */ 1153 surf_back, x, y, /* src */ 1154 width, height); 1155} 1156 1157 1158 1159void XMesaFlush( XMesaContext c ) 1160{ 1161 if (c && c->xm_visual->display) { 1162 st_finish(c->st); 1163 XSync( c->xm_visual->display, False ); 1164 } 1165} 1166 1167 1168 1169 1170 1171XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d ) 1172{ 1173 XMesaBuffer b; 1174 for (b = XMesaBufferList; b; b = b->Next) { 1175 if (b->drawable == d && b->xm_visual->display == dpy) { 1176 return b; 1177 } 1178 } 1179 return NULL; 1180} 1181 1182 1183/** 1184 * Free/destroy all XMesaBuffers associated with given display. 1185 */ 1186void xmesa_destroy_buffers_on_display(Display *dpy) 1187{ 1188 XMesaBuffer b, next; 1189 for (b = XMesaBufferList; b; b = next) { 1190 next = b->Next; 1191 if (b->xm_visual->display == dpy) { 1192 xmesa_free_buffer(b); 1193 } 1194 } 1195} 1196 1197 1198/* 1199 * Look for XMesaBuffers whose X window has been destroyed. 1200 * Deallocate any such XMesaBuffers. 1201 */ 1202void XMesaGarbageCollect( void ) 1203{ 1204 XMesaBuffer b, next; 1205 for (b=XMesaBufferList; b; b=next) { 1206 next = b->Next; 1207 if (b->xm_visual && 1208 b->xm_visual->display && 1209 b->drawable && 1210 b->type == WINDOW) { 1211 XSync(b->xm_visual->display, False); 1212 if (!window_exists( b->xm_visual->display, b->drawable )) { 1213 /* found a dead window, free the ancillary info */ 1214 XMesaDestroyBuffer( b ); 1215 } 1216 } 1217 } 1218} 1219 1220 1221 1222 1223PUBLIC void 1224XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer, 1225 const int *attrib_list) 1226{ 1227} 1228 1229 1230 1231PUBLIC void 1232XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer) 1233{ 1234} 1235 1236