xm_api.c revision 3e38dbe3d3371f0a37dd35582301ae2b1507e5d2
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 * 39 * Byte swapping: If the Mesa host and the X display use a different 40 * byte order then there's some trickiness to be aware of when using 41 * XImages. The byte ordering used for the XImage is that of the X 42 * display, not the Mesa host. 43 * The color-to-pixel encoding for True/DirectColor must be done 44 * according to the display's visual red_mask, green_mask, and blue_mask. 45 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 46 * do byte swapping if needed. If one wants to directly "poke" the pixel 47 * into the XImage's buffer then the pixel must be byte swapped first. 48 * 49 */ 50 51#ifdef __CYGWIN__ 52#undef WIN32 53#undef __WIN32__ 54#endif 55 56#include "xm_api.h" 57#include "main/context.h" 58#include "main/framebuffer.h" 59 60#include "state_tracker/st_public.h" 61#include "state_tracker/st_context.h" 62#include "pipe/p_defines.h" 63#include "pipe/p_screen.h" 64#include "pipe/p_context.h" 65 66#include "xm_public.h" 67#include <GL/glx.h> 68 69 70/* Driver interface routines, set up by xlib backend on library 71 * _init(). These are global in the same way that function names are 72 * global. 73 */ 74static struct xm_driver driver; 75 76void xmesa_set_driver( const struct xm_driver *templ ) 77{ 78 driver = *templ; 79} 80 81/** 82 * Global X driver lock 83 */ 84pipe_mutex _xmesa_lock; 85 86static struct pipe_screen *screen = NULL; 87 88 89/**********************************************************************/ 90/***** X Utility Functions *****/ 91/**********************************************************************/ 92 93 94/** 95 * Return the host's byte order as LSBFirst or MSBFirst ala X. 96 */ 97static int host_byte_order( void ) 98{ 99 int i = 1; 100 char *cptr = (char *) &i; 101 return (*cptr==1) ? LSBFirst : MSBFirst; 102} 103 104 105 106 107/** 108 * Return the true number of bits per pixel for XImages. 109 * For example, if we request a 24-bit deep visual we may actually need/get 110 * 32bpp XImages. This function returns the appropriate bpp. 111 * Input: dpy - the X display 112 * visinfo - desribes the visual to be used for XImages 113 * Return: true number of bits per pixel for XImages 114 */ 115static int 116bits_per_pixel( XMesaVisual xmv ) 117{ 118 Display *dpy = xmv->display; 119 XVisualInfo * visinfo = xmv->visinfo; 120 XImage *img; 121 int bitsPerPixel; 122 /* Create a temporary XImage */ 123 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 124 ZPixmap, 0, /*format, offset*/ 125 (char*) MALLOC(8), /*data*/ 126 1, 1, /*width, height*/ 127 32, /*bitmap_pad*/ 128 0 /*bytes_per_line*/ 129 ); 130 assert(img); 131 /* grab the bits/pixel value */ 132 bitsPerPixel = img->bits_per_pixel; 133 /* free the XImage */ 134 free( img->data ); 135 img->data = NULL; 136 XDestroyImage( img ); 137 return bitsPerPixel; 138} 139 140 141 142/* 143 * Determine if a given X window ID is valid (window exists). 144 * Do this by calling XGetWindowAttributes() for the window and 145 * checking if we catch an X error. 146 * Input: dpy - the display 147 * win - the window to check for existance 148 * Return: GL_TRUE - window exists 149 * GL_FALSE - window doesn't exist 150 */ 151static GLboolean WindowExistsFlag; 152 153static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr ) 154{ 155 (void) dpy; 156 if (xerr->error_code == BadWindow) { 157 WindowExistsFlag = GL_FALSE; 158 } 159 return 0; 160} 161 162static GLboolean window_exists( Display *dpy, Window win ) 163{ 164 XWindowAttributes wa; 165 int (*old_handler)( Display*, XErrorEvent* ); 166 WindowExistsFlag = GL_TRUE; 167 old_handler = XSetErrorHandler(window_exists_err_handler); 168 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 169 XSetErrorHandler(old_handler); 170 return WindowExistsFlag; 171} 172 173static Status 174get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height ) 175{ 176 Window root; 177 Status stat; 178 int xpos, ypos; 179 unsigned int w, h, bw, depth; 180 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 181 *width = w; 182 *height = h; 183 return stat; 184} 185 186 187/** 188 * Return the size of the window (or pixmap) that corresponds to the 189 * given XMesaBuffer. 190 * \param width returns width in pixels 191 * \param height returns height in pixels 192 */ 193void 194xmesa_get_window_size(Display *dpy, XMesaBuffer b, 195 GLuint *width, GLuint *height) 196{ 197 Status stat; 198 199 pipe_mutex_lock(_xmesa_lock); 200 XSync(b->xm_visual->display, 0); /* added for Chromium */ 201 stat = get_drawable_size(dpy, b->ws.drawable, width, height); 202 pipe_mutex_unlock(_xmesa_lock); 203 204 if (!stat) { 205 /* probably querying a window that's recently been destroyed */ 206 _mesa_warning(NULL, "XGetGeometry failed!\n"); 207 *width = *height = 1; 208 } 209} 210 211#define GET_REDMASK(__v) __v->mesa_visual.redMask 212#define GET_GREENMASK(__v) __v->mesa_visual.greenMask 213#define GET_BLUEMASK(__v) __v->mesa_visual.blueMask 214 215 216/** 217 * Choose the pixel format for the given visual. 218 * This will tell the gallium driver how to pack pixel data into 219 * drawing surfaces. 220 */ 221static GLuint 222choose_pixel_format(XMesaVisual v) 223{ 224 boolean native_byte_order = (host_byte_order() == 225 ImageByteOrder(v->display)); 226 227 if ( GET_REDMASK(v) == 0x0000ff 228 && GET_GREENMASK(v) == 0x00ff00 229 && GET_BLUEMASK(v) == 0xff0000 230 && v->BitsPerPixel == 32) { 231 if (native_byte_order) { 232 /* no byteswapping needed */ 233 return PIPE_FORMAT_R8G8B8A8_UNORM; 234 } 235 else { 236 return PIPE_FORMAT_A8B8G8R8_UNORM; 237 } 238 } 239 else if ( GET_REDMASK(v) == 0xff0000 240 && GET_GREENMASK(v) == 0x00ff00 241 && GET_BLUEMASK(v) == 0x0000ff 242 && v->BitsPerPixel == 32) { 243 if (native_byte_order) { 244 /* no byteswapping needed */ 245 return PIPE_FORMAT_B8G8R8A8_UNORM; 246 } 247 else { 248 return PIPE_FORMAT_A8R8G8B8_UNORM; 249 } 250 } 251 else if ( GET_REDMASK(v) == 0x0000ff00 252 && GET_GREENMASK(v) == 0x00ff0000 253 && GET_BLUEMASK(v) == 0xff000000 254 && v->BitsPerPixel == 32) { 255 if (native_byte_order) { 256 /* no byteswapping needed */ 257 return PIPE_FORMAT_A8R8G8B8_UNORM; 258 } 259 else { 260 return PIPE_FORMAT_B8G8R8A8_UNORM; 261 } 262 } 263 else if ( GET_REDMASK(v) == 0xf800 264 && GET_GREENMASK(v) == 0x07e0 265 && GET_BLUEMASK(v) == 0x001f 266 && native_byte_order 267 && v->BitsPerPixel == 16) { 268 /* 5-6-5 RGB */ 269 return PIPE_FORMAT_B5G6R5_UNORM; 270 } 271 272 assert(0); 273 return 0; 274} 275 276 277 278/** 279 * Query the default gallium screen for a Z/Stencil format that 280 * at least matches the given depthBits and stencilBits. 281 */ 282static void 283xmesa_choose_z_stencil_format(int depthBits, int stencilBits, 284 enum pipe_format *depthFormat, 285 enum pipe_format *stencilFormat) 286{ 287 const enum pipe_texture_target target = PIPE_TEXTURE_2D; 288 const unsigned tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL; 289 const unsigned geom_flags = (PIPE_TEXTURE_GEOM_NON_SQUARE | 290 PIPE_TEXTURE_GEOM_NON_POWER_OF_TWO); 291 static enum pipe_format formats[] = { 292 PIPE_FORMAT_S8Z24_UNORM, 293 PIPE_FORMAT_Z24S8_UNORM, 294 PIPE_FORMAT_Z16_UNORM, 295 PIPE_FORMAT_Z32_UNORM 296 }; 297 int i; 298 299 assert(screen); 300 301 *depthFormat = *stencilFormat = PIPE_FORMAT_NONE; 302 303 /* search for supported format */ 304 for (i = 0; i < Elements(formats); i++) { 305 if (screen->is_format_supported(screen, formats[i], 306 target, tex_usage, geom_flags)) { 307 *depthFormat = formats[i]; 308 break; 309 } 310 } 311 312 if (stencilBits) { 313 *stencilFormat = *depthFormat; 314 } 315 316 /* XXX we should check that he chosen format has at least as many bits 317 * as what was requested. 318 */ 319} 320 321 322 323/**********************************************************************/ 324/***** Linked list of XMesaBuffers *****/ 325/**********************************************************************/ 326 327XMesaBuffer XMesaBufferList = NULL; 328 329 330/** 331 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 332 * Note that XMesaBuffer is derived from GLframebuffer. 333 * The new XMesaBuffer will not have any size (Width=Height=0). 334 * 335 * \param d the corresponding X drawable (window or pixmap) 336 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 337 * \param vis the buffer's visual 338 * \param cmap the window's colormap, if known. 339 * \return new XMesaBuffer or NULL if any problem 340 */ 341static XMesaBuffer 342create_xmesa_buffer(Drawable d, BufferType type, 343 XMesaVisual vis, Colormap cmap) 344{ 345 XMesaBuffer b; 346 GLframebuffer *fb; 347 enum pipe_format colorFormat, depthFormat, stencilFormat; 348 uint width, height; 349 350 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 351 352 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 353 if (!b) 354 return NULL; 355 356 b->ws.drawable = d; 357 b->ws.visual = vis->visinfo->visual; 358 b->ws.depth = vis->visinfo->depth; 359 360 b->xm_visual = vis; 361 b->type = type; 362 b->cmap = cmap; 363 364 /* determine PIPE_FORMATs for buffers */ 365 colorFormat = choose_pixel_format(vis); 366 367 xmesa_choose_z_stencil_format(vis->mesa_visual.depthBits, 368 vis->mesa_visual.stencilBits, 369 &depthFormat, &stencilFormat); 370 371 372 get_drawable_size(vis->display, d, &width, &height); 373 374 /* 375 * Create framebuffer, but we'll plug in our own renderbuffers below. 376 */ 377 b->stfb = st_create_framebuffer(&vis->mesa_visual, 378 colorFormat, depthFormat, stencilFormat, 379 width, height, 380 (void *) b); 381 fb = &b->stfb->Base; 382 383 /* GLX_EXT_texture_from_pixmap */ 384 b->TextureTarget = 0; 385 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 386 b->TextureMipmap = 0; 387 388 /* insert buffer into linked list */ 389 b->Next = XMesaBufferList; 390 XMesaBufferList = b; 391 392 return b; 393} 394 395 396/** 397 * Find an XMesaBuffer by matching X display and colormap but NOT matching 398 * the notThis buffer. 399 */ 400XMesaBuffer 401xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis) 402{ 403 XMesaBuffer b; 404 for (b = XMesaBufferList; b; b = b->Next) { 405 if (b->xm_visual->display == dpy && 406 b->cmap == cmap && 407 b != notThis) { 408 return b; 409 } 410 } 411 return NULL; 412} 413 414 415/** 416 * Remove buffer from linked list, delete if no longer referenced. 417 */ 418static void 419xmesa_free_buffer(XMesaBuffer buffer) 420{ 421 XMesaBuffer prev = NULL, b; 422 423 for (b = XMesaBufferList; b; b = b->Next) { 424 if (b == buffer) { 425 struct gl_framebuffer *fb = &buffer->stfb->Base; 426 427 /* unlink buffer from list */ 428 if (prev) 429 prev->Next = buffer->Next; 430 else 431 XMesaBufferList = buffer->Next; 432 433 /* mark as delete pending */ 434 fb->DeletePending = GL_TRUE; 435 436 /* Since the X window for the XMesaBuffer is going away, we don't 437 * want to dereference this pointer in the future. 438 */ 439 b->ws.drawable = 0; 440 441 /* Unreference. If count = zero we'll really delete the buffer */ 442 _mesa_reference_framebuffer(&fb, NULL); 443 444 free(buffer); 445 446 return; 447 } 448 /* continue search */ 449 prev = b; 450 } 451 /* buffer not found in XMesaBufferList */ 452 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 453} 454 455 456 457/**********************************************************************/ 458/***** Misc Private Functions *****/ 459/**********************************************************************/ 460 461 462/** 463 * When a context is bound for the first time, we can finally finish 464 * initializing the context's visual and buffer information. 465 * \param v the XMesaVisual to initialize 466 * \param b the XMesaBuffer to initialize (may be NULL) 467 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 468 * \param window the window/pixmap we're rendering into 469 * \param cmap the colormap associated with the window/pixmap 470 * \return GL_TRUE=success, GL_FALSE=failure 471 */ 472static GLboolean 473initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 474 GLboolean rgb_flag, Drawable window, 475 Colormap cmap) 476{ 477 ASSERT(!b || b->xm_visual == v); 478 479 /* Save true bits/pixel */ 480 v->BitsPerPixel = bits_per_pixel(v); 481 assert(v->BitsPerPixel > 0); 482 483 if (rgb_flag == GL_FALSE) { 484 /* COLOR-INDEXED WINDOW: not supported*/ 485 return GL_FALSE; 486 } 487 else { 488 /* RGB WINDOW: 489 * We support RGB rendering into almost any kind of visual. 490 */ 491 const int xclass = v->mesa_visual.visualType; 492 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) { 493 _mesa_warning(NULL, 494 "XMesa: RGB mode rendering not supported in given visual.\n"); 495 return GL_FALSE; 496 } 497 v->mesa_visual.indexBits = 0; 498 499 if (v->BitsPerPixel == 32) { 500 /* We use XImages for all front/back buffers. If an X Window or 501 * X Pixmap is 32bpp, there's no guarantee that the alpha channel 502 * will be preserved. For XImages we're in luck. 503 */ 504 v->mesa_visual.alphaBits = 8; 505 } 506 } 507 508 /* 509 * If MESA_INFO env var is set print out some debugging info 510 * which can help Brian figure out what's going on when a user 511 * reports bugs. 512 */ 513 if (_mesa_getenv("MESA_INFO")) { 514 printf("X/Mesa visual = %p\n", (void *) v); 515 printf("X/Mesa level = %d\n", v->mesa_visual.level); 516 printf("X/Mesa depth = %d\n", v->visinfo->depth); 517 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 518 } 519 520 return GL_TRUE; 521} 522 523 524 525#define NUM_VISUAL_TYPES 6 526 527/** 528 * Convert an X visual type to a GLX visual type. 529 * 530 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 531 * to be converted. 532 * \return If \c visualType is a valid X visual type, a GLX visual type will 533 * be returned. Otherwise \c GLX_NONE will be returned. 534 * 535 * \note 536 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 537 * DRI CVS tree. 538 */ 539static GLint 540xmesa_convert_from_x_visual_type( int visualType ) 541{ 542 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 543 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 544 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 545 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 546 }; 547 548 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 549 ? glx_visual_types[ visualType ] : GLX_NONE; 550} 551 552 553/**********************************************************************/ 554/***** Public Functions *****/ 555/**********************************************************************/ 556 557 558/* 559 * Create a new X/Mesa visual. 560 * Input: display - X11 display 561 * visinfo - an XVisualInfo pointer 562 * rgb_flag - GL_TRUE = RGB mode, 563 * GL_FALSE = color index mode 564 * alpha_flag - alpha buffer requested? 565 * db_flag - GL_TRUE = double-buffered, 566 * GL_FALSE = single buffered 567 * stereo_flag - stereo visual? 568 * ximage_flag - GL_TRUE = use an XImage for back buffer, 569 * GL_FALSE = use an off-screen pixmap for back buffer 570 * depth_size - requested bits/depth values, or zero 571 * stencil_size - requested bits/stencil values, or zero 572 * accum_red_size - requested bits/red accum values, or zero 573 * accum_green_size - requested bits/green accum values, or zero 574 * accum_blue_size - requested bits/blue accum values, or zero 575 * accum_alpha_size - requested bits/alpha accum values, or zero 576 * num_samples - number of samples/pixel if multisampling, or zero 577 * level - visual level, usually 0 578 * visualCaveat - ala the GLX extension, usually GLX_NONE 579 * Return; a new XMesaVisual or 0 if error. 580 */ 581PUBLIC 582XMesaVisual XMesaCreateVisual( Display *display, 583 XVisualInfo * visinfo, 584 GLboolean rgb_flag, 585 GLboolean alpha_flag, 586 GLboolean db_flag, 587 GLboolean stereo_flag, 588 GLboolean ximage_flag, 589 GLint depth_size, 590 GLint stencil_size, 591 GLint accum_red_size, 592 GLint accum_green_size, 593 GLint accum_blue_size, 594 GLint accum_alpha_size, 595 GLint num_samples, 596 GLint level, 597 GLint visualCaveat ) 598{ 599 XMesaVisual v; 600 GLint red_bits, green_bits, blue_bits, alpha_bits; 601 602 xmesa_init( display ); 603 604 /* For debugging only */ 605 if (_mesa_getenv("MESA_XSYNC")) { 606 /* This makes debugging X easier. 607 * In your debugger, set a breakpoint on _XError to stop when an 608 * X protocol error is generated. 609 */ 610 XSynchronize( display, 1 ); 611 } 612 613 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 614 if (!v) { 615 return NULL; 616 } 617 618 v->display = display; 619 620 /* Save a copy of the XVisualInfo struct because the user may Xfree() 621 * the struct but we may need some of the information contained in it 622 * at a later time. 623 */ 624 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 625 if (!v->visinfo) { 626 free(v); 627 return NULL; 628 } 629 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 630 631 v->ximage_flag = ximage_flag; 632 633 v->mesa_visual.redMask = visinfo->red_mask; 634 v->mesa_visual.greenMask = visinfo->green_mask; 635 v->mesa_visual.blueMask = visinfo->blue_mask; 636 v->mesa_visual.visualID = visinfo->visualid; 637 v->mesa_visual.screen = visinfo->screen; 638 639#if !(defined(__cplusplus) || defined(c_plusplus)) 640 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 641#else 642 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 643#endif 644 645 v->mesa_visual.visualRating = visualCaveat; 646 647 if (alpha_flag) 648 v->mesa_visual.alphaBits = 8; 649 650 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 651 652 { 653 const int xclass = v->mesa_visual.visualType; 654 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 655 red_bits = _mesa_bitcount(GET_REDMASK(v)); 656 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 657 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 658 } 659 else { 660 /* this is an approximation */ 661 int depth; 662 depth = v->visinfo->depth; 663 red_bits = depth / 3; 664 depth -= red_bits; 665 green_bits = depth / 2; 666 depth -= green_bits; 667 blue_bits = depth; 668 alpha_bits = 0; 669 assert( red_bits + green_bits + blue_bits == v->visinfo->depth ); 670 } 671 alpha_bits = v->mesa_visual.alphaBits; 672 } 673 674 _mesa_initialize_visual( &v->mesa_visual, 675 db_flag, stereo_flag, 676 red_bits, green_bits, 677 blue_bits, alpha_bits, 678 depth_size, 679 stencil_size, 680 accum_red_size, accum_green_size, 681 accum_blue_size, accum_alpha_size, 682 0 ); 683 684 /* XXX minor hack */ 685 v->mesa_visual.level = level; 686 return v; 687} 688 689 690PUBLIC 691void XMesaDestroyVisual( XMesaVisual v ) 692{ 693 free(v->visinfo); 694 free(v); 695} 696 697 698/** 699 * Do one-time initializations. 700 */ 701void 702xmesa_init( Display *display ) 703{ 704 static GLboolean firstTime = GL_TRUE; 705 if (firstTime) { 706 pipe_mutex_init(_xmesa_lock); 707 screen = driver.create_pipe_screen( display ); 708 firstTime = GL_FALSE; 709 } 710} 711 712 713/** 714 * Create a new XMesaContext. 715 * \param v the XMesaVisual 716 * \param share_list another XMesaContext with which to share display 717 * lists or NULL if no sharing is wanted. 718 * \return an XMesaContext or NULL if error. 719 */ 720PUBLIC 721XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 722{ 723 struct pipe_context *pipe = NULL; 724 XMesaContext c; 725 GLcontext *mesaCtx; 726 uint pf; 727 728 xmesa_init( v->display ); 729 730 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 731 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 732 if (!c) 733 return NULL; 734 735 pf = choose_pixel_format(v); 736 assert(pf); 737 738 c->xm_visual = v; 739 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 740 c->xm_read_buffer = NULL; 741 742 if (screen == NULL) 743 goto fail; 744 745 /* Trace screen knows how to properly wrap context creation in the 746 * wrapped screen, so nothing special to do here: 747 */ 748 pipe = screen->context_create(screen, (void *) c); 749 if (pipe == NULL) 750 goto fail; 751 752 c->st = st_create_context(pipe, 753 &v->mesa_visual, 754 share_list ? share_list->st : NULL); 755 if (c->st == NULL) 756 goto fail; 757 758 mesaCtx = c->st->ctx; 759 c->st->ctx->DriverCtx = c; 760 761 return c; 762 763fail: 764 if (c->st) 765 st_destroy_context(c->st); 766 else if (pipe) 767 pipe->destroy(pipe); 768 769 free(c); 770 return NULL; 771} 772 773 774 775PUBLIC 776void XMesaDestroyContext( XMesaContext c ) 777{ 778 st_destroy_context(c->st); 779 780 /* FIXME: We should destroy the screen here, but if we do so, surfaces may 781 * outlive it, causing segfaults 782 struct pipe_screen *screen = c->st->pipe->screen; 783 screen->destroy(screen); 784 */ 785 786 free(c); 787} 788 789 790 791/** 792 * Private function for creating an XMesaBuffer which corresponds to an 793 * X window or pixmap. 794 * \param v the window's XMesaVisual 795 * \param w the window we're wrapping 796 * \return new XMesaBuffer or NULL if error 797 */ 798PUBLIC XMesaBuffer 799XMesaCreateWindowBuffer(XMesaVisual v, Window w) 800{ 801 XWindowAttributes attr; 802 XMesaBuffer b; 803 Colormap cmap; 804 int depth; 805 806 assert(v); 807 assert(w); 808 809 /* Check that window depth matches visual depth */ 810 XGetWindowAttributes( v->display, w, &attr ); 811 depth = attr.depth; 812 if (v->visinfo->depth != depth) { 813 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 814 v->visinfo->depth, depth); 815 return NULL; 816 } 817 818 /* Find colormap */ 819 if (attr.colormap) { 820 cmap = attr.colormap; 821 } 822 else { 823 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 824 /* this is weird, a window w/out a colormap!? */ 825 /* OK, let's just allocate a new one and hope for the best */ 826 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 827 } 828 829 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap); 830 if (!b) 831 return NULL; 832 833 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 834 (Drawable) w, cmap )) { 835 xmesa_free_buffer(b); 836 return NULL; 837 } 838 839 return b; 840} 841 842 843 844/** 845 * Create a new XMesaBuffer from an X pixmap. 846 * 847 * \param v the XMesaVisual 848 * \param p the pixmap 849 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 850 * \c GLX_DIRECT_COLOR visual for the pixmap 851 * \returns new XMesaBuffer or NULL if error 852 */ 853PUBLIC XMesaBuffer 854XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap) 855{ 856 XMesaBuffer b; 857 858 assert(v); 859 860 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 861 if (!b) 862 return NULL; 863 864 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 865 (Drawable) p, cmap)) { 866 xmesa_free_buffer(b); 867 return NULL; 868 } 869 870 return b; 871} 872 873 874/** 875 * For GLX_EXT_texture_from_pixmap 876 */ 877XMesaBuffer 878XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p, 879 Colormap cmap, 880 int format, int target, int mipmap) 881{ 882 GET_CURRENT_CONTEXT(ctx); 883 XMesaBuffer b; 884 GLuint width, height; 885 886 assert(v); 887 888 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 889 if (!b) 890 return NULL; 891 892 /* get pixmap size, update framebuffer/renderbuffer dims */ 893 xmesa_get_window_size(v->display, b, &width, &height); 894 _mesa_resize_framebuffer(NULL, &(b->stfb->Base), width, height); 895 896 if (target == 0) { 897 /* examine dims */ 898 if (ctx->Extensions.ARB_texture_non_power_of_two) { 899 target = GLX_TEXTURE_2D_EXT; 900 } 901 else if ( _mesa_bitcount(width) == 1 902 && _mesa_bitcount(height) == 1) { 903 /* power of two size */ 904 if (height == 1) { 905 target = GLX_TEXTURE_1D_EXT; 906 } 907 else { 908 target = GLX_TEXTURE_2D_EXT; 909 } 910 } 911 else if (ctx->Extensions.NV_texture_rectangle) { 912 target = GLX_TEXTURE_RECTANGLE_EXT; 913 } 914 else { 915 /* non power of two textures not supported */ 916 XMesaDestroyBuffer(b); 917 return 0; 918 } 919 } 920 921 b->TextureTarget = target; 922 b->TextureFormat = format; 923 b->TextureMipmap = mipmap; 924 925 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 926 (Drawable) p, cmap)) { 927 xmesa_free_buffer(b); 928 return NULL; 929 } 930 931 return b; 932} 933 934 935 936XMesaBuffer 937XMesaCreatePBuffer(XMesaVisual v, Colormap cmap, 938 unsigned int width, unsigned int height) 939{ 940 Window root; 941 Drawable drawable; /* X Pixmap Drawable */ 942 XMesaBuffer b; 943 944 /* allocate pixmap for front buffer */ 945 root = RootWindow( v->display, v->visinfo->screen ); 946 drawable = XCreatePixmap(v->display, root, width, height, 947 v->visinfo->depth); 948 if (!drawable) 949 return NULL; 950 951 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 952 if (!b) 953 return NULL; 954 955 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 956 drawable, cmap)) { 957 xmesa_free_buffer(b); 958 return NULL; 959 } 960 961 return b; 962} 963 964 965 966/* 967 * Deallocate an XMesaBuffer structure and all related info. 968 */ 969PUBLIC void 970XMesaDestroyBuffer(XMesaBuffer b) 971{ 972 xmesa_free_buffer(b); 973} 974 975 976/** 977 * Query the current window size and update the corresponding GLframebuffer 978 * and all attached renderbuffers. 979 * Called when: 980 * 1. the first time a buffer is bound to a context. 981 * 2. SwapBuffers. XXX probabaly from xm_flush_frontbuffer() too... 982 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 983 * when resizing a buffer when no rendering context is bound. 984 */ 985void 986xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 987{ 988 GLuint width, height; 989 xmesa_get_window_size(drawBuffer->xm_visual->display, drawBuffer, &width, &height); 990 st_resize_framebuffer(drawBuffer->stfb, width, height); 991} 992 993 994 995 996/* 997 * Bind buffer b to context c and make c the current rendering context. 998 */ 999PUBLIC 1000GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1001 XMesaBuffer readBuffer ) 1002{ 1003 XMesaContext old_ctx = XMesaGetCurrentContext(); 1004 1005 if (old_ctx && old_ctx != c) { 1006 XMesaFlush(old_ctx); 1007 old_ctx->xm_buffer = NULL; 1008 old_ctx->xm_read_buffer = NULL; 1009 } 1010 1011 if (c) { 1012 if (!drawBuffer || !readBuffer) 1013 return GL_FALSE; /* must specify buffers! */ 1014 1015 if (c == old_ctx && 1016 c->xm_buffer == drawBuffer && 1017 c->xm_read_buffer == readBuffer) 1018 return GL_TRUE; 1019 1020 c->xm_buffer = drawBuffer; 1021 c->xm_read_buffer = readBuffer; 1022 1023 st_make_current(c->st, drawBuffer->stfb, readBuffer->stfb, 1024 &drawBuffer->ws); 1025 1026 xmesa_check_and_update_buffer_size(c, drawBuffer); 1027 if (readBuffer != drawBuffer) 1028 xmesa_check_and_update_buffer_size(c, readBuffer); 1029 1030 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1031 drawBuffer->wasCurrent = GL_TRUE; 1032 } 1033 else { 1034 /* Detach */ 1035 st_make_current( NULL, NULL, NULL, NULL ); 1036 1037 } 1038 return GL_TRUE; 1039} 1040 1041 1042/* 1043 * Unbind the context c from its buffer. 1044 */ 1045GLboolean XMesaUnbindContext( XMesaContext c ) 1046{ 1047 /* A no-op for XFree86 integration purposes */ 1048 return GL_TRUE; 1049} 1050 1051 1052XMesaContext XMesaGetCurrentContext( void ) 1053{ 1054 GET_CURRENT_CONTEXT(ctx); 1055 if (ctx) { 1056 XMesaContext xmesa = xmesa_context(ctx); 1057 return xmesa; 1058 } 1059 else { 1060 return 0; 1061 } 1062} 1063 1064 1065 1066/** 1067 * Swap front and back color buffers and have winsys display front buffer. 1068 * If there's no front color buffer no swap actually occurs. 1069 */ 1070PUBLIC 1071void XMesaSwapBuffers( XMesaBuffer b ) 1072{ 1073 struct pipe_surface *frontLeftSurf; 1074 1075 st_swapbuffers(b->stfb, &frontLeftSurf, NULL); 1076 1077 if (frontLeftSurf) { 1078 screen->flush_frontbuffer( screen, 1079 frontLeftSurf, 1080 &b->ws ); 1081 } 1082 1083 xmesa_check_and_update_buffer_size(NULL, b); 1084} 1085 1086 1087 1088/* 1089 * Copy sub-region of back buffer to front buffer 1090 */ 1091void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1092{ 1093 struct pipe_surface *surf_front; 1094 struct pipe_surface *surf_back; 1095 struct pipe_context *pipe = NULL; /* XXX fix */ 1096 1097 st_get_framebuffer_surface(b->stfb, ST_SURFACE_FRONT_LEFT, &surf_front); 1098 st_get_framebuffer_surface(b->stfb, ST_SURFACE_BACK_LEFT, &surf_back); 1099 1100 if (!surf_front || !surf_back) 1101 return; 1102 1103 assert(pipe); 1104 pipe->surface_copy(pipe, 1105 surf_front, x, y, /* dest */ 1106 surf_back, x, y, /* src */ 1107 width, height); 1108} 1109 1110 1111 1112void XMesaFlush( XMesaContext c ) 1113{ 1114 if (c && c->xm_visual->display) { 1115 st_finish(c->st); 1116 XSync( c->xm_visual->display, False ); 1117 } 1118} 1119 1120 1121 1122 1123 1124XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d ) 1125{ 1126 XMesaBuffer b; 1127 for (b = XMesaBufferList; b; b = b->Next) { 1128 if (b->ws.drawable == d && b->xm_visual->display == dpy) { 1129 return b; 1130 } 1131 } 1132 return NULL; 1133} 1134 1135 1136/** 1137 * Free/destroy all XMesaBuffers associated with given display. 1138 */ 1139void xmesa_destroy_buffers_on_display(Display *dpy) 1140{ 1141 XMesaBuffer b, next; 1142 for (b = XMesaBufferList; b; b = next) { 1143 next = b->Next; 1144 if (b->xm_visual->display == dpy) { 1145 xmesa_free_buffer(b); 1146 } 1147 } 1148} 1149 1150 1151/* 1152 * Look for XMesaBuffers whose X window has been destroyed. 1153 * Deallocate any such XMesaBuffers. 1154 */ 1155void XMesaGarbageCollect( void ) 1156{ 1157 XMesaBuffer b, next; 1158 for (b=XMesaBufferList; b; b=next) { 1159 next = b->Next; 1160 if (b->xm_visual && 1161 b->xm_visual->display && 1162 b->ws.drawable && 1163 b->type == WINDOW) { 1164 XSync(b->xm_visual->display, False); 1165 if (!window_exists( b->xm_visual->display, b->ws.drawable )) { 1166 /* found a dead window, free the ancillary info */ 1167 XMesaDestroyBuffer( b ); 1168 } 1169 } 1170 } 1171} 1172 1173 1174 1175 1176PUBLIC void 1177XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer, 1178 const int *attrib_list) 1179{ 1180} 1181 1182 1183 1184PUBLIC void 1185XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer) 1186{ 1187} 1188 1189