xm_api.c revision a84575cdc0c8193b2c7858734e2ec6b1ec4511b2
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 * Query the default gallium screen for a Z/Stencil format that 324 * at least matches the given depthBits and stencilBits. 325 */ 326static void 327xmesa_choose_z_stencil_format(int depthBits, int stencilBits, 328 enum pipe_format *depthFormat, 329 enum pipe_format *stencilFormat) 330{ 331 const enum pipe_texture_target target = PIPE_TEXTURE_2D; 332 const unsigned tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL; 333 const unsigned geom_flags = (PIPE_TEXTURE_GEOM_NON_SQUARE | 334 PIPE_TEXTURE_GEOM_NON_POWER_OF_TWO); 335 static enum pipe_format formats[] = { 336 PIPE_FORMAT_Z24S8_UNORM, 337 PIPE_FORMAT_S8Z24_UNORM, 338 PIPE_FORMAT_Z16_UNORM, 339 PIPE_FORMAT_Z32_UNORM 340 }; 341 int i; 342 343 assert(screen); 344 345 *depthFormat = *stencilFormat = PIPE_FORMAT_NONE; 346 347 /* search for supported format */ 348 for (i = 0; i < Elements(formats); i++) { 349 if (screen->is_format_supported(screen, formats[i], 350 target, tex_usage, geom_flags)) { 351 *depthFormat = formats[i]; 352 break; 353 } 354 } 355 356 if (stencilBits) { 357 *stencilFormat = *depthFormat; 358 } 359 360 /* XXX we should check that he chosen format has at least as many bits 361 * as what was requested. 362 */ 363} 364 365 366 367/**********************************************************************/ 368/***** Linked list of XMesaBuffers *****/ 369/**********************************************************************/ 370 371XMesaBuffer XMesaBufferList = NULL; 372 373 374/** 375 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 376 * Note that XMesaBuffer is derived from GLframebuffer. 377 * The new XMesaBuffer will not have any size (Width=Height=0). 378 * 379 * \param d the corresponding X drawable (window or pixmap) 380 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 381 * \param vis the buffer's visual 382 * \param cmap the window's colormap, if known. 383 * \return new XMesaBuffer or NULL if any problem 384 */ 385static XMesaBuffer 386create_xmesa_buffer(Drawable d, BufferType type, 387 XMesaVisual vis, Colormap cmap) 388{ 389 XMesaBuffer b; 390 GLframebuffer *fb; 391 enum pipe_format colorFormat, depthFormat, stencilFormat; 392 uint width, height; 393 394 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 395 396 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 397 if (!b) 398 return NULL; 399 400 b->drawable = d; 401 402 b->xm_visual = vis; 403 b->type = type; 404 b->cmap = cmap; 405 406 /* determine PIPE_FORMATs for buffers */ 407 colorFormat = choose_pixel_format(vis); 408 409 xmesa_choose_z_stencil_format(vis->mesa_visual.depthBits, 410 vis->mesa_visual.stencilBits, 411 &depthFormat, &stencilFormat); 412 413 414 get_drawable_size(vis->display, d, &width, &height); 415 416 /* 417 * Create framebuffer, but we'll plug in our own renderbuffers below. 418 */ 419 b->stfb = st_create_framebuffer(&vis->mesa_visual, 420 colorFormat, depthFormat, stencilFormat, 421 width, height, 422 (void *) b); 423 fb = &b->stfb->Base; 424 425 /* 426 * Create scratch XImage for xmesa_display_surface() 427 */ 428 b->tempImage = XCreateImage(vis->display, 429 vis->visinfo->visual, 430 vis->visinfo->depth, 431 ZPixmap, 0, /* format, offset */ 432 NULL, /* data */ 433 0, 0, /* size */ 434 32, /* bitmap_pad */ 435 0); /* bytes_per_line */ 436 437 /* GLX_EXT_texture_from_pixmap */ 438 b->TextureTarget = 0; 439 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 440 b->TextureMipmap = 0; 441 442 /* insert buffer into linked list */ 443 b->Next = XMesaBufferList; 444 XMesaBufferList = b; 445 446 return b; 447} 448 449 450/** 451 * Find an XMesaBuffer by matching X display and colormap but NOT matching 452 * the notThis buffer. 453 */ 454XMesaBuffer 455xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis) 456{ 457 XMesaBuffer b; 458 for (b = XMesaBufferList; b; b = b->Next) { 459 if (b->xm_visual->display == dpy && 460 b->cmap == cmap && 461 b != notThis) { 462 return b; 463 } 464 } 465 return NULL; 466} 467 468 469/** 470 * Remove buffer from linked list, delete if no longer referenced. 471 */ 472static void 473xmesa_free_buffer(XMesaBuffer buffer) 474{ 475 XMesaBuffer prev = NULL, b; 476 477 for (b = XMesaBufferList; b; b = b->Next) { 478 if (b == buffer) { 479 struct gl_framebuffer *fb = &buffer->stfb->Base; 480 481 /* unlink buffer from list */ 482 if (prev) 483 prev->Next = buffer->Next; 484 else 485 XMesaBufferList = buffer->Next; 486 487 /* mark as delete pending */ 488 fb->DeletePending = GL_TRUE; 489 490 /* Since the X window for the XMesaBuffer is going away, we don't 491 * want to dereference this pointer in the future. 492 */ 493 b->drawable = 0; 494 495 buffer->tempImage->data = NULL; 496 XDestroyImage(buffer->tempImage); 497 498 /* Unreference. If count = zero we'll really delete the buffer */ 499 _mesa_reference_framebuffer(&fb, NULL); 500 501 XFreeGC(b->xm_visual->display, b->gc); 502 503 free(buffer); 504 505 return; 506 } 507 /* continue search */ 508 prev = b; 509 } 510 /* buffer not found in XMesaBufferList */ 511 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 512} 513 514 515 516/**********************************************************************/ 517/***** Misc Private Functions *****/ 518/**********************************************************************/ 519 520 521/** 522 * When a context is bound for the first time, we can finally finish 523 * initializing the context's visual and buffer information. 524 * \param v the XMesaVisual to initialize 525 * \param b the XMesaBuffer to initialize (may be NULL) 526 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 527 * \param window the window/pixmap we're rendering into 528 * \param cmap the colormap associated with the window/pixmap 529 * \return GL_TRUE=success, GL_FALSE=failure 530 */ 531static GLboolean 532initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 533 GLboolean rgb_flag, Drawable window, 534 Colormap cmap) 535{ 536 ASSERT(!b || b->xm_visual == v); 537 538 /* Save true bits/pixel */ 539 v->BitsPerPixel = bits_per_pixel(v); 540 assert(v->BitsPerPixel > 0); 541 542 if (rgb_flag == GL_FALSE) { 543 /* COLOR-INDEXED WINDOW: not supported*/ 544 return GL_FALSE; 545 } 546 else { 547 /* RGB WINDOW: 548 * We support RGB rendering into almost any kind of visual. 549 */ 550 const int xclass = v->mesa_visual.visualType; 551 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) { 552 _mesa_warning(NULL, 553 "XMesa: RGB mode rendering not supported in given visual.\n"); 554 return GL_FALSE; 555 } 556 v->mesa_visual.indexBits = 0; 557 558 if (v->BitsPerPixel == 32) { 559 /* We use XImages for all front/back buffers. If an X Window or 560 * X Pixmap is 32bpp, there's no guarantee that the alpha channel 561 * will be preserved. For XImages we're in luck. 562 */ 563 v->mesa_visual.alphaBits = 8; 564 } 565 } 566 567 /* 568 * If MESA_INFO env var is set print out some debugging info 569 * which can help Brian figure out what's going on when a user 570 * reports bugs. 571 */ 572 if (_mesa_getenv("MESA_INFO")) { 573 printf("X/Mesa visual = %p\n", (void *) v); 574 printf("X/Mesa level = %d\n", v->mesa_visual.level); 575 printf("X/Mesa depth = %d\n", v->visinfo->depth); 576 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 577 } 578 579 if (b && window) { 580 /* these should have been set in create_xmesa_buffer */ 581 ASSERT(b->drawable == window); 582 583 /* Setup for single/double buffering */ 584 if (v->mesa_visual.doubleBufferMode) { 585 /* Double buffered */ 586 b->shm = xmesa_check_for_xshm( v->display ); 587 } 588 589 /* X11 graphics context */ 590 b->gc = XCreateGC( v->display, window, 0, NULL ); 591 XSetFunction( v->display, b->gc, GXcopy ); 592 } 593 594 return GL_TRUE; 595} 596 597 598 599#define NUM_VISUAL_TYPES 6 600 601/** 602 * Convert an X visual type to a GLX visual type. 603 * 604 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 605 * to be converted. 606 * \return If \c visualType is a valid X visual type, a GLX visual type will 607 * be returned. Otherwise \c GLX_NONE will be returned. 608 * 609 * \note 610 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 611 * DRI CVS tree. 612 */ 613static GLint 614xmesa_convert_from_x_visual_type( int visualType ) 615{ 616 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 617 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 618 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 619 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 620 }; 621 622 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 623 ? glx_visual_types[ visualType ] : GLX_NONE; 624} 625 626 627/**********************************************************************/ 628/***** Public Functions *****/ 629/**********************************************************************/ 630 631 632/* 633 * Create a new X/Mesa visual. 634 * Input: display - X11 display 635 * visinfo - an XVisualInfo pointer 636 * rgb_flag - GL_TRUE = RGB mode, 637 * GL_FALSE = color index mode 638 * alpha_flag - alpha buffer requested? 639 * db_flag - GL_TRUE = double-buffered, 640 * GL_FALSE = single buffered 641 * stereo_flag - stereo visual? 642 * ximage_flag - GL_TRUE = use an XImage for back buffer, 643 * GL_FALSE = use an off-screen pixmap for back buffer 644 * depth_size - requested bits/depth values, or zero 645 * stencil_size - requested bits/stencil values, or zero 646 * accum_red_size - requested bits/red accum values, or zero 647 * accum_green_size - requested bits/green accum values, or zero 648 * accum_blue_size - requested bits/blue accum values, or zero 649 * accum_alpha_size - requested bits/alpha accum values, or zero 650 * num_samples - number of samples/pixel if multisampling, or zero 651 * level - visual level, usually 0 652 * visualCaveat - ala the GLX extension, usually GLX_NONE 653 * Return; a new XMesaVisual or 0 if error. 654 */ 655PUBLIC 656XMesaVisual XMesaCreateVisual( Display *display, 657 XVisualInfo * visinfo, 658 GLboolean rgb_flag, 659 GLboolean alpha_flag, 660 GLboolean db_flag, 661 GLboolean stereo_flag, 662 GLboolean ximage_flag, 663 GLint depth_size, 664 GLint stencil_size, 665 GLint accum_red_size, 666 GLint accum_green_size, 667 GLint accum_blue_size, 668 GLint accum_alpha_size, 669 GLint num_samples, 670 GLint level, 671 GLint visualCaveat ) 672{ 673 XMesaVisual v; 674 GLint red_bits, green_bits, blue_bits, alpha_bits; 675 676 xmesa_init(); 677 678 /* For debugging only */ 679 if (_mesa_getenv("MESA_XSYNC")) { 680 /* This makes debugging X easier. 681 * In your debugger, set a breakpoint on _XError to stop when an 682 * X protocol error is generated. 683 */ 684 XSynchronize( display, 1 ); 685 } 686 687 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 688 if (!v) { 689 return NULL; 690 } 691 692 v->display = display; 693 694 /* Save a copy of the XVisualInfo struct because the user may Xfree() 695 * the struct but we may need some of the information contained in it 696 * at a later time. 697 */ 698 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 699 if (!v->visinfo) { 700 free(v); 701 return NULL; 702 } 703 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 704 705 v->ximage_flag = ximage_flag; 706 707 v->mesa_visual.redMask = visinfo->red_mask; 708 v->mesa_visual.greenMask = visinfo->green_mask; 709 v->mesa_visual.blueMask = visinfo->blue_mask; 710 v->mesa_visual.visualID = visinfo->visualid; 711 v->mesa_visual.screen = visinfo->screen; 712 713#if !(defined(__cplusplus) || defined(c_plusplus)) 714 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 715#else 716 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 717#endif 718 719 v->mesa_visual.visualRating = visualCaveat; 720 721 if (alpha_flag) 722 v->mesa_visual.alphaBits = 8; 723 724 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 725 726 { 727 const int xclass = v->mesa_visual.visualType; 728 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 729 red_bits = _mesa_bitcount(GET_REDMASK(v)); 730 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 731 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 732 } 733 else { 734 /* this is an approximation */ 735 int depth; 736 depth = v->visinfo->depth; 737 red_bits = depth / 3; 738 depth -= red_bits; 739 green_bits = depth / 2; 740 depth -= green_bits; 741 blue_bits = depth; 742 alpha_bits = 0; 743 assert( red_bits + green_bits + blue_bits == v->visinfo->depth ); 744 } 745 alpha_bits = v->mesa_visual.alphaBits; 746 } 747 748 _mesa_initialize_visual( &v->mesa_visual, 749 rgb_flag, db_flag, stereo_flag, 750 red_bits, green_bits, 751 blue_bits, alpha_bits, 752 v->mesa_visual.indexBits, 753 depth_size, 754 stencil_size, 755 accum_red_size, accum_green_size, 756 accum_blue_size, accum_alpha_size, 757 0 ); 758 759 /* XXX minor hack */ 760 v->mesa_visual.level = level; 761 return v; 762} 763 764 765PUBLIC 766void XMesaDestroyVisual( XMesaVisual v ) 767{ 768 free(v->visinfo); 769 free(v); 770} 771 772 773/** 774 * Do one-time initializations. 775 */ 776void 777xmesa_init(void) 778{ 779 static GLboolean firstTime = GL_TRUE; 780 if (firstTime) { 781 pipe_mutex_init(_xmesa_lock); 782 _screen = driver.create_pipe_screen(); 783 screen = trace_screen_create( _screen ); 784 firstTime = GL_FALSE; 785 } 786} 787 788 789/** 790 * Create a new XMesaContext. 791 * \param v the XMesaVisual 792 * \param share_list another XMesaContext with which to share display 793 * lists or NULL if no sharing is wanted. 794 * \return an XMesaContext or NULL if error. 795 */ 796PUBLIC 797XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 798{ 799 struct pipe_context *pipe = NULL; 800 XMesaContext c; 801 GLcontext *mesaCtx; 802 uint pf; 803 804 xmesa_init(); 805 806 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 807 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 808 if (!c) 809 return NULL; 810 811 pf = choose_pixel_format(v); 812 assert(pf); 813 814 c->xm_visual = v; 815 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 816 c->xm_read_buffer = NULL; 817 818 if (screen == NULL) 819 goto fail; 820 821 /* Trace screen knows how to properly wrap context creation in the 822 * wrapped screen, so nothing special to do here: 823 */ 824 pipe = screen->context_create(screen, (void *) c); 825 if (pipe == NULL) 826 goto fail; 827 828 c->st = st_create_context(pipe, 829 &v->mesa_visual, 830 share_list ? share_list->st : NULL); 831 if (c->st == NULL) 832 goto fail; 833 834 mesaCtx = c->st->ctx; 835 c->st->ctx->DriverCtx = c; 836 837 return c; 838 839fail: 840 if (c->st) 841 st_destroy_context(c->st); 842 else if (pipe) 843 pipe->destroy(pipe); 844 845 free(c); 846 return NULL; 847} 848 849 850 851PUBLIC 852void XMesaDestroyContext( XMesaContext c ) 853{ 854 st_destroy_context(c->st); 855 856 /* FIXME: We should destroy the screen here, but if we do so, surfaces may 857 * outlive it, causing segfaults 858 struct pipe_screen *screen = c->st->pipe->screen; 859 screen->destroy(screen); 860 */ 861 862 free(c); 863} 864 865 866 867/** 868 * Private function for creating an XMesaBuffer which corresponds to an 869 * X window or pixmap. 870 * \param v the window's XMesaVisual 871 * \param w the window we're wrapping 872 * \return new XMesaBuffer or NULL if error 873 */ 874PUBLIC XMesaBuffer 875XMesaCreateWindowBuffer(XMesaVisual v, Window w) 876{ 877 XWindowAttributes attr; 878 XMesaBuffer b; 879 Colormap cmap; 880 int depth; 881 882 assert(v); 883 assert(w); 884 885 /* Check that window depth matches visual depth */ 886 XGetWindowAttributes( v->display, w, &attr ); 887 depth = attr.depth; 888 if (v->visinfo->depth != depth) { 889 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 890 v->visinfo->depth, depth); 891 return NULL; 892 } 893 894 /* Find colormap */ 895 if (attr.colormap) { 896 cmap = attr.colormap; 897 } 898 else { 899 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 900 /* this is weird, a window w/out a colormap!? */ 901 /* OK, let's just allocate a new one and hope for the best */ 902 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 903 } 904 905 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap); 906 if (!b) 907 return NULL; 908 909 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 910 (Drawable) w, cmap )) { 911 xmesa_free_buffer(b); 912 return NULL; 913 } 914 915 return b; 916} 917 918 919 920/** 921 * Create a new XMesaBuffer from an X pixmap. 922 * 923 * \param v the XMesaVisual 924 * \param p the pixmap 925 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 926 * \c GLX_DIRECT_COLOR visual for the pixmap 927 * \returns new XMesaBuffer or NULL if error 928 */ 929PUBLIC XMesaBuffer 930XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap) 931{ 932 XMesaBuffer b; 933 934 assert(v); 935 936 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 937 if (!b) 938 return NULL; 939 940 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 941 (Drawable) p, cmap)) { 942 xmesa_free_buffer(b); 943 return NULL; 944 } 945 946 return b; 947} 948 949 950/** 951 * For GLX_EXT_texture_from_pixmap 952 */ 953XMesaBuffer 954XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p, 955 Colormap cmap, 956 int format, int target, int mipmap) 957{ 958 GET_CURRENT_CONTEXT(ctx); 959 XMesaBuffer b; 960 GLuint width, height; 961 962 assert(v); 963 964 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 965 if (!b) 966 return NULL; 967 968 /* get pixmap size, update framebuffer/renderbuffer dims */ 969 xmesa_get_window_size(v->display, b, &width, &height); 970 _mesa_resize_framebuffer(NULL, &(b->stfb->Base), width, height); 971 972 if (target == 0) { 973 /* examine dims */ 974 if (ctx->Extensions.ARB_texture_non_power_of_two) { 975 target = GLX_TEXTURE_2D_EXT; 976 } 977 else if ( _mesa_bitcount(width) == 1 978 && _mesa_bitcount(height) == 1) { 979 /* power of two size */ 980 if (height == 1) { 981 target = GLX_TEXTURE_1D_EXT; 982 } 983 else { 984 target = GLX_TEXTURE_2D_EXT; 985 } 986 } 987 else if (ctx->Extensions.NV_texture_rectangle) { 988 target = GLX_TEXTURE_RECTANGLE_EXT; 989 } 990 else { 991 /* non power of two textures not supported */ 992 XMesaDestroyBuffer(b); 993 return 0; 994 } 995 } 996 997 b->TextureTarget = target; 998 b->TextureFormat = format; 999 b->TextureMipmap = mipmap; 1000 1001 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1002 (Drawable) p, cmap)) { 1003 xmesa_free_buffer(b); 1004 return NULL; 1005 } 1006 1007 return b; 1008} 1009 1010 1011 1012XMesaBuffer 1013XMesaCreatePBuffer(XMesaVisual v, Colormap cmap, 1014 unsigned int width, unsigned int height) 1015{ 1016 Window root; 1017 Drawable drawable; /* X Pixmap Drawable */ 1018 XMesaBuffer b; 1019 1020 /* allocate pixmap for front buffer */ 1021 root = RootWindow( v->display, v->visinfo->screen ); 1022 drawable = XCreatePixmap(v->display, root, width, height, 1023 v->visinfo->depth); 1024 if (!drawable) 1025 return NULL; 1026 1027 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1028 if (!b) 1029 return NULL; 1030 1031 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1032 drawable, cmap)) { 1033 xmesa_free_buffer(b); 1034 return NULL; 1035 } 1036 1037 return b; 1038} 1039 1040 1041 1042/* 1043 * Deallocate an XMesaBuffer structure and all related info. 1044 */ 1045PUBLIC void 1046XMesaDestroyBuffer(XMesaBuffer b) 1047{ 1048 xmesa_free_buffer(b); 1049} 1050 1051 1052/** 1053 * Query the current window size and update the corresponding GLframebuffer 1054 * and all attached renderbuffers. 1055 * Called when: 1056 * 1. the first time a buffer is bound to a context. 1057 * 2. SwapBuffers. XXX probabaly from xm_flush_frontbuffer() too... 1058 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1059 * when resizing a buffer when no rendering context is bound. 1060 */ 1061void 1062xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1063{ 1064 GLuint width, height; 1065 xmesa_get_window_size(drawBuffer->xm_visual->display, drawBuffer, &width, &height); 1066 st_resize_framebuffer(drawBuffer->stfb, width, height); 1067} 1068 1069 1070 1071 1072/* 1073 * Bind buffer b to context c and make c the current rendering context. 1074 */ 1075PUBLIC 1076GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1077 XMesaBuffer readBuffer ) 1078{ 1079 XMesaContext old_ctx = XMesaGetCurrentContext(); 1080 1081 if (old_ctx && old_ctx != c) { 1082 XMesaFlush(old_ctx); 1083 old_ctx->xm_buffer = NULL; 1084 old_ctx->xm_read_buffer = NULL; 1085 } 1086 1087 if (c) { 1088 if (!drawBuffer || !readBuffer) 1089 return GL_FALSE; /* must specify buffers! */ 1090 1091 if (c == old_ctx && 1092 c->xm_buffer == drawBuffer && 1093 c->xm_read_buffer == readBuffer) 1094 return GL_TRUE; 1095 1096 c->xm_buffer = drawBuffer; 1097 c->xm_read_buffer = readBuffer; 1098 1099 st_make_current(c->st, drawBuffer->stfb, readBuffer->stfb); 1100 1101 xmesa_check_and_update_buffer_size(c, drawBuffer); 1102 if (readBuffer != drawBuffer) 1103 xmesa_check_and_update_buffer_size(c, readBuffer); 1104 1105 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1106 drawBuffer->wasCurrent = GL_TRUE; 1107 } 1108 else { 1109 /* Detach */ 1110 st_make_current( NULL, NULL, NULL ); 1111 1112 } 1113 return GL_TRUE; 1114} 1115 1116 1117/* 1118 * Unbind the context c from its buffer. 1119 */ 1120GLboolean XMesaUnbindContext( XMesaContext c ) 1121{ 1122 /* A no-op for XFree86 integration purposes */ 1123 return GL_TRUE; 1124} 1125 1126 1127XMesaContext XMesaGetCurrentContext( void ) 1128{ 1129 GET_CURRENT_CONTEXT(ctx); 1130 if (ctx) { 1131 XMesaContext xmesa = xmesa_context(ctx); 1132 return xmesa; 1133 } 1134 else { 1135 return 0; 1136 } 1137} 1138 1139 1140 1141/** 1142 * Swap front and back color buffers and have winsys display front buffer. 1143 * If there's no front color buffer no swap actually occurs. 1144 */ 1145PUBLIC 1146void XMesaSwapBuffers( XMesaBuffer b ) 1147{ 1148 struct pipe_surface *frontLeftSurf; 1149 1150 st_swapbuffers(b->stfb, &frontLeftSurf, NULL); 1151 1152 if (frontLeftSurf) { 1153 if (_screen != screen) { 1154 struct trace_surface *tr_surf = trace_surface( frontLeftSurf ); 1155 struct pipe_surface *surf = tr_surf->surface; 1156 frontLeftSurf = surf; 1157 } 1158 1159 driver.display_surface(b, frontLeftSurf); 1160 } 1161 1162 xmesa_check_and_update_buffer_size(NULL, b); 1163} 1164 1165 1166 1167/* 1168 * Copy sub-region of back buffer to front buffer 1169 */ 1170void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1171{ 1172 struct pipe_surface *surf_front; 1173 struct pipe_surface *surf_back; 1174 struct pipe_context *pipe = NULL; /* XXX fix */ 1175 1176 st_get_framebuffer_surface(b->stfb, ST_SURFACE_FRONT_LEFT, &surf_front); 1177 st_get_framebuffer_surface(b->stfb, ST_SURFACE_BACK_LEFT, &surf_back); 1178 1179 if (!surf_front || !surf_back) 1180 return; 1181 1182 assert(pipe); 1183 pipe->surface_copy(pipe, 1184 surf_front, x, y, /* dest */ 1185 surf_back, x, y, /* src */ 1186 width, height); 1187} 1188 1189 1190 1191void XMesaFlush( XMesaContext c ) 1192{ 1193 if (c && c->xm_visual->display) { 1194 st_finish(c->st); 1195 XSync( c->xm_visual->display, False ); 1196 } 1197} 1198 1199 1200 1201 1202 1203XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d ) 1204{ 1205 XMesaBuffer b; 1206 for (b = XMesaBufferList; b; b = b->Next) { 1207 if (b->drawable == d && b->xm_visual->display == dpy) { 1208 return b; 1209 } 1210 } 1211 return NULL; 1212} 1213 1214 1215/** 1216 * Free/destroy all XMesaBuffers associated with given display. 1217 */ 1218void xmesa_destroy_buffers_on_display(Display *dpy) 1219{ 1220 XMesaBuffer b, next; 1221 for (b = XMesaBufferList; b; b = next) { 1222 next = b->Next; 1223 if (b->xm_visual->display == dpy) { 1224 xmesa_free_buffer(b); 1225 } 1226 } 1227} 1228 1229 1230/* 1231 * Look for XMesaBuffers whose X window has been destroyed. 1232 * Deallocate any such XMesaBuffers. 1233 */ 1234void XMesaGarbageCollect( void ) 1235{ 1236 XMesaBuffer b, next; 1237 for (b=XMesaBufferList; b; b=next) { 1238 next = b->Next; 1239 if (b->xm_visual && 1240 b->xm_visual->display && 1241 b->drawable && 1242 b->type == WINDOW) { 1243 XSync(b->xm_visual->display, False); 1244 if (!window_exists( b->xm_visual->display, b->drawable )) { 1245 /* found a dead window, free the ancillary info */ 1246 XMesaDestroyBuffer( b ); 1247 } 1248 } 1249 } 1250} 1251 1252 1253 1254 1255PUBLIC void 1256XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer, 1257 const int *attrib_list) 1258{ 1259} 1260 1261 1262 1263PUBLIC void 1264XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer) 1265{ 1266} 1267 1268