xm_api.c revision 866f9b18c68ede63c00917ec9c3dae3524ca8826
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 "xm_st.h" 58 59#include "pipe/p_defines.h" 60#include "pipe/p_screen.h" 61#include "pipe/p_context.h" 62#include "util/u_atomic.h" 63 64#include "xm_public.h" 65#include <GL/glx.h> 66 67 68/* Driver interface routines, set up by xlib backend on library 69 * _init(). These are global in the same way that function names are 70 * global. 71 */ 72static struct xm_driver driver; 73static struct st_api *stapi; 74 75/* Default strict invalidate to false. This means we will not call 76 * XGetGeometry after every swapbuffers, which allows swapbuffers to 77 * remain asynchronous. For apps running at 100fps with synchronous 78 * swapping, a 10% boost is typical. For gears, I see closer to 20% 79 * speedup. 80 * 81 * Note that the work of copying data on swapbuffers doesn't disappear 82 * - this change just allows the X server to execute the PutImage 83 * asynchronously without us effectively blocked until its completion. 84 * 85 * This speeds up even llvmpipe's threaded rasterization as the 86 * swapbuffers operation was a large part of the serial component of 87 * an llvmpipe frame. 88 * 89 * The downside of this is correctness - applications which don't call 90 * glViewport on window resizes will get incorrect rendering. A 91 * better solution would be to have per-frame but asynchronous 92 * invalidation. Xcb almost looks as if it could provide this, but 93 * the API doesn't seem to quite be there. 94 */ 95boolean xmesa_strict_invalidate = FALSE; 96 97void xmesa_set_driver( const struct xm_driver *templ ) 98{ 99 driver = *templ; 100 stapi = driver.create_st_api(); 101 102 xmesa_strict_invalidate = 103 debug_get_bool_option("XMESA_STRICT_INVALIDATE", FALSE); 104} 105 106 107/* 108 * XXX replace this with a linked list, or better yet, try to attach the 109 * gallium/mesa extra bits to the X Display object with XAddExtension(). 110 */ 111#define MAX_DISPLAYS 10 112static struct xmesa_display Displays[MAX_DISPLAYS]; 113static int NumDisplays = 0; 114 115static int 116xmesa_get_param(struct st_manager *smapi, 117 enum st_manager_param param) 118{ 119 switch(param) { 120 case ST_MANAGER_BROKEN_INVALIDATE: 121 return !xmesa_strict_invalidate; 122 default: 123 return 0; 124 } 125} 126 127static XMesaDisplay 128xmesa_init_display( Display *display ) 129{ 130 pipe_static_mutex(init_mutex); 131 XMesaDisplay xmdpy; 132 int i; 133 134 pipe_mutex_lock(init_mutex); 135 136 /* Look for XMesaDisplay which corresponds to 'display' */ 137 for (i = 0; i < NumDisplays; i++) { 138 if (Displays[i].display == display) { 139 /* Found it */ 140 pipe_mutex_unlock(init_mutex); 141 return &Displays[i]; 142 } 143 } 144 145 /* Create new XMesaDisplay */ 146 147 assert(NumDisplays < MAX_DISPLAYS); 148 xmdpy = &Displays[NumDisplays]; 149 NumDisplays++; 150 151 if (!xmdpy->display && display) { 152 xmdpy->display = display; 153 xmdpy->screen = driver.create_pipe_screen(display); 154 xmdpy->smapi = CALLOC_STRUCT(st_manager); 155 if (xmdpy->smapi) { 156 xmdpy->smapi->screen = xmdpy->screen; 157 xmdpy->smapi->get_param = xmesa_get_param; 158 } 159 160 if (xmdpy->screen && xmdpy->smapi) { 161 pipe_mutex_init(xmdpy->mutex); 162 } 163 else { 164 if (xmdpy->screen) { 165 xmdpy->screen->destroy(xmdpy->screen); 166 xmdpy->screen = NULL; 167 } 168 if (xmdpy->smapi) { 169 FREE(xmdpy->smapi); 170 xmdpy->smapi = NULL; 171 } 172 173 xmdpy->display = NULL; 174 } 175 } 176 if (!xmdpy->display || xmdpy->display != display) 177 xmdpy = NULL; 178 179 pipe_mutex_unlock(init_mutex); 180 181 return xmdpy; 182} 183 184/**********************************************************************/ 185/***** X Utility Functions *****/ 186/**********************************************************************/ 187 188 189/** 190 * Return the host's byte order as LSBFirst or MSBFirst ala X. 191 */ 192static int host_byte_order( void ) 193{ 194 int i = 1; 195 char *cptr = (char *) &i; 196 return (*cptr==1) ? LSBFirst : MSBFirst; 197} 198 199 200 201 202/** 203 * Return the true number of bits per pixel for XImages. 204 * For example, if we request a 24-bit deep visual we may actually need/get 205 * 32bpp XImages. This function returns the appropriate bpp. 206 * Input: dpy - the X display 207 * visinfo - desribes the visual to be used for XImages 208 * Return: true number of bits per pixel for XImages 209 */ 210static int 211bits_per_pixel( XMesaVisual xmv ) 212{ 213 Display *dpy = xmv->display; 214 XVisualInfo * visinfo = xmv->visinfo; 215 XImage *img; 216 int bitsPerPixel; 217 /* Create a temporary XImage */ 218 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 219 ZPixmap, 0, /*format, offset*/ 220 (char*) MALLOC(8), /*data*/ 221 1, 1, /*width, height*/ 222 32, /*bitmap_pad*/ 223 0 /*bytes_per_line*/ 224 ); 225 assert(img); 226 /* grab the bits/pixel value */ 227 bitsPerPixel = img->bits_per_pixel; 228 /* free the XImage */ 229 free( img->data ); 230 img->data = NULL; 231 XDestroyImage( img ); 232 return bitsPerPixel; 233} 234 235 236 237/* 238 * Determine if a given X window ID is valid (window exists). 239 * Do this by calling XGetWindowAttributes() for the window and 240 * checking if we catch an X error. 241 * Input: dpy - the display 242 * win - the window to check for existance 243 * Return: GL_TRUE - window exists 244 * GL_FALSE - window doesn't exist 245 */ 246static GLboolean WindowExistsFlag; 247 248static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr ) 249{ 250 (void) dpy; 251 if (xerr->error_code == BadWindow) { 252 WindowExistsFlag = GL_FALSE; 253 } 254 return 0; 255} 256 257static GLboolean window_exists( Display *dpy, Window win ) 258{ 259 XWindowAttributes wa; 260 int (*old_handler)( Display*, XErrorEvent* ); 261 WindowExistsFlag = GL_TRUE; 262 old_handler = XSetErrorHandler(window_exists_err_handler); 263 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 264 XSetErrorHandler(old_handler); 265 return WindowExistsFlag; 266} 267 268static Status 269get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height ) 270{ 271 Window root; 272 Status stat; 273 int xpos, ypos; 274 unsigned int w, h, bw, depth; 275 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 276 *width = w; 277 *height = h; 278 return stat; 279} 280 281 282/** 283 * Return the size of the window (or pixmap) that corresponds to the 284 * given XMesaBuffer. 285 * \param width returns width in pixels 286 * \param height returns height in pixels 287 */ 288void 289xmesa_get_window_size(Display *dpy, XMesaBuffer b, 290 GLuint *width, GLuint *height) 291{ 292 XMesaDisplay xmdpy = xmesa_init_display(dpy); 293 Status stat; 294 295 pipe_mutex_lock(xmdpy->mutex); 296 stat = get_drawable_size(dpy, b->ws.drawable, width, height); 297 pipe_mutex_unlock(xmdpy->mutex); 298 299 if (!stat) { 300 /* probably querying a window that's recently been destroyed */ 301 _mesa_warning(NULL, "XGetGeometry failed!\n"); 302 *width = *height = 1; 303 } 304} 305 306#define GET_REDMASK(__v) __v->mesa_visual.redMask 307#define GET_GREENMASK(__v) __v->mesa_visual.greenMask 308#define GET_BLUEMASK(__v) __v->mesa_visual.blueMask 309 310 311/** 312 * Choose the pixel format for the given visual. 313 * This will tell the gallium driver how to pack pixel data into 314 * drawing surfaces. 315 */ 316static GLuint 317choose_pixel_format(XMesaVisual v) 318{ 319 boolean native_byte_order = (host_byte_order() == 320 ImageByteOrder(v->display)); 321 322 if ( GET_REDMASK(v) == 0x0000ff 323 && GET_GREENMASK(v) == 0x00ff00 324 && GET_BLUEMASK(v) == 0xff0000 325 && v->BitsPerPixel == 32) { 326 if (native_byte_order) { 327 /* no byteswapping needed */ 328 return PIPE_FORMAT_R8G8B8A8_UNORM; 329 } 330 else { 331 return PIPE_FORMAT_A8B8G8R8_UNORM; 332 } 333 } 334 else if ( GET_REDMASK(v) == 0xff0000 335 && GET_GREENMASK(v) == 0x00ff00 336 && GET_BLUEMASK(v) == 0x0000ff 337 && v->BitsPerPixel == 32) { 338 if (native_byte_order) { 339 /* no byteswapping needed */ 340 return PIPE_FORMAT_B8G8R8A8_UNORM; 341 } 342 else { 343 return PIPE_FORMAT_A8R8G8B8_UNORM; 344 } 345 } 346 else if ( GET_REDMASK(v) == 0x0000ff00 347 && GET_GREENMASK(v) == 0x00ff0000 348 && GET_BLUEMASK(v) == 0xff000000 349 && v->BitsPerPixel == 32) { 350 if (native_byte_order) { 351 /* no byteswapping needed */ 352 return PIPE_FORMAT_A8R8G8B8_UNORM; 353 } 354 else { 355 return PIPE_FORMAT_B8G8R8A8_UNORM; 356 } 357 } 358 else if ( GET_REDMASK(v) == 0xf800 359 && GET_GREENMASK(v) == 0x07e0 360 && GET_BLUEMASK(v) == 0x001f 361 && native_byte_order 362 && v->BitsPerPixel == 16) { 363 /* 5-6-5 RGB */ 364 return PIPE_FORMAT_B5G6R5_UNORM; 365 } 366 367 return PIPE_FORMAT_NONE; 368} 369 370 371/** 372 * Choose a depth/stencil format that satisfies the given depth and 373 * stencil sizes. 374 */ 375static enum pipe_format 376choose_depth_stencil_format(XMesaDisplay xmdpy, int depth, int stencil) 377{ 378 const enum pipe_texture_target target = PIPE_TEXTURE_2D; 379 const unsigned tex_usage = PIPE_BIND_DEPTH_STENCIL; 380 const unsigned sample_count = 0; 381 enum pipe_format formats[8], fmt; 382 int count, i; 383 384 count = 0; 385 386 if (depth <= 16 && stencil == 0) { 387 formats[count++] = PIPE_FORMAT_Z16_UNORM; 388 } 389 if (depth <= 24 && stencil == 0) { 390 formats[count++] = PIPE_FORMAT_X8Z24_UNORM; 391 formats[count++] = PIPE_FORMAT_Z24X8_UNORM; 392 } 393 if (depth <= 24 && stencil <= 8) { 394 formats[count++] = PIPE_FORMAT_S8_UINT_Z24_UNORM; 395 formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_UINT; 396 } 397 if (depth <= 32 && stencil == 0) { 398 formats[count++] = PIPE_FORMAT_Z32_UNORM; 399 } 400 401 fmt = PIPE_FORMAT_NONE; 402 for (i = 0; i < count; i++) { 403 if (xmdpy->screen->is_format_supported(xmdpy->screen, formats[i], 404 target, sample_count, 405 tex_usage)) { 406 fmt = formats[i]; 407 break; 408 } 409 } 410 411 return fmt; 412} 413 414 415 416/**********************************************************************/ 417/***** Linked list of XMesaBuffers *****/ 418/**********************************************************************/ 419 420static XMesaBuffer XMesaBufferList = NULL; 421 422 423/** 424 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 425 * Note that XMesaBuffer is derived from struct gl_framebuffer. 426 * The new XMesaBuffer will not have any size (Width=Height=0). 427 * 428 * \param d the corresponding X drawable (window or pixmap) 429 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 430 * \param vis the buffer's visual 431 * \param cmap the window's colormap, if known. 432 * \return new XMesaBuffer or NULL if any problem 433 */ 434static XMesaBuffer 435create_xmesa_buffer(Drawable d, BufferType type, 436 XMesaVisual vis, Colormap cmap) 437{ 438 XMesaDisplay xmdpy = xmesa_init_display(vis->display); 439 XMesaBuffer b; 440 uint width, height; 441 442 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 443 444 if (!xmdpy) 445 return NULL; 446 447 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 448 if (!b) 449 return NULL; 450 451 b->ws.drawable = d; 452 b->ws.visual = vis->visinfo->visual; 453 b->ws.depth = vis->visinfo->depth; 454 455 b->xm_visual = vis; 456 b->type = type; 457 b->cmap = cmap; 458 459 get_drawable_size(vis->display, d, &width, &height); 460 461 /* 462 * Create framebuffer, but we'll plug in our own renderbuffers below. 463 */ 464 b->stfb = xmesa_create_st_framebuffer(xmdpy, b); 465 466 /* GLX_EXT_texture_from_pixmap */ 467 b->TextureTarget = 0; 468 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 469 b->TextureMipmap = 0; 470 471 /* insert buffer into linked list */ 472 b->Next = XMesaBufferList; 473 XMesaBufferList = b; 474 475 return b; 476} 477 478 479/** 480 * Find an XMesaBuffer by matching X display and colormap but NOT matching 481 * the notThis buffer. 482 */ 483XMesaBuffer 484xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis) 485{ 486 XMesaBuffer b; 487 for (b = XMesaBufferList; b; b = b->Next) { 488 if (b->xm_visual->display == dpy && 489 b->cmap == cmap && 490 b != notThis) { 491 return b; 492 } 493 } 494 return NULL; 495} 496 497 498/** 499 * Remove buffer from linked list, delete if no longer referenced. 500 */ 501static void 502xmesa_free_buffer(XMesaBuffer buffer) 503{ 504 XMesaBuffer prev = NULL, b; 505 506 for (b = XMesaBufferList; b; b = b->Next) { 507 if (b == buffer) { 508 /* unlink buffer from list */ 509 if (prev) 510 prev->Next = buffer->Next; 511 else 512 XMesaBufferList = buffer->Next; 513 514 /* Since the X window for the XMesaBuffer is going away, we don't 515 * want to dereference this pointer in the future. 516 */ 517 b->ws.drawable = 0; 518 519 /* XXX we should move the buffer to a delete-pending list and destroy 520 * the buffer until it is no longer current. 521 */ 522 xmesa_destroy_st_framebuffer(buffer->stfb); 523 524 free(buffer); 525 526 return; 527 } 528 /* continue search */ 529 prev = b; 530 } 531 /* buffer not found in XMesaBufferList */ 532 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 533} 534 535 536 537/**********************************************************************/ 538/***** Misc Private Functions *****/ 539/**********************************************************************/ 540 541 542/** 543 * When a context is bound for the first time, we can finally finish 544 * initializing the context's visual and buffer information. 545 * \param v the XMesaVisual to initialize 546 * \param b the XMesaBuffer to initialize (may be NULL) 547 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 548 * \param window the window/pixmap we're rendering into 549 * \param cmap the colormap associated with the window/pixmap 550 * \return GL_TRUE=success, GL_FALSE=failure 551 */ 552static GLboolean 553initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 554 GLboolean rgb_flag, Drawable window, 555 Colormap cmap) 556{ 557 ASSERT(!b || b->xm_visual == v); 558 559 /* Save true bits/pixel */ 560 v->BitsPerPixel = bits_per_pixel(v); 561 assert(v->BitsPerPixel > 0); 562 563 if (rgb_flag == GL_FALSE) { 564 /* COLOR-INDEXED WINDOW: not supported*/ 565 return GL_FALSE; 566 } 567 else { 568 /* RGB WINDOW: 569 * We support RGB rendering into almost any kind of visual. 570 */ 571 const int xclass = v->visualType; 572 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) { 573 _mesa_warning(NULL, 574 "XMesa: RGB mode rendering not supported in given visual.\n"); 575 return GL_FALSE; 576 } 577 v->mesa_visual.indexBits = 0; 578 579 if (v->BitsPerPixel == 32) { 580 /* We use XImages for all front/back buffers. If an X Window or 581 * X Pixmap is 32bpp, there's no guarantee that the alpha channel 582 * will be preserved. For XImages we're in luck. 583 */ 584 v->mesa_visual.alphaBits = 8; 585 } 586 } 587 588 /* 589 * If MESA_INFO env var is set print out some debugging info 590 * which can help Brian figure out what's going on when a user 591 * reports bugs. 592 */ 593 if (_mesa_getenv("MESA_INFO")) { 594 printf("X/Mesa visual = %p\n", (void *) v); 595 printf("X/Mesa level = %d\n", v->mesa_visual.level); 596 printf("X/Mesa depth = %d\n", v->visinfo->depth); 597 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 598 } 599 600 return GL_TRUE; 601} 602 603 604 605#define NUM_VISUAL_TYPES 6 606 607/** 608 * Convert an X visual type to a GLX visual type. 609 * 610 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 611 * to be converted. 612 * \return If \c visualType is a valid X visual type, a GLX visual type will 613 * be returned. Otherwise \c GLX_NONE will be returned. 614 * 615 * \note 616 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 617 * DRI CVS tree. 618 */ 619static GLint 620xmesa_convert_from_x_visual_type( int visualType ) 621{ 622 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 623 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 624 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 625 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 626 }; 627 628 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 629 ? glx_visual_types[ visualType ] : GLX_NONE; 630} 631 632 633/**********************************************************************/ 634/***** Public Functions *****/ 635/**********************************************************************/ 636 637 638/* 639 * Create a new X/Mesa visual. 640 * Input: display - X11 display 641 * visinfo - an XVisualInfo pointer 642 * rgb_flag - GL_TRUE = RGB mode, 643 * GL_FALSE = color index mode 644 * alpha_flag - alpha buffer requested? 645 * db_flag - GL_TRUE = double-buffered, 646 * GL_FALSE = single buffered 647 * stereo_flag - stereo visual? 648 * ximage_flag - GL_TRUE = use an XImage for back buffer, 649 * GL_FALSE = use an off-screen pixmap for back buffer 650 * depth_size - requested bits/depth values, or zero 651 * stencil_size - requested bits/stencil values, or zero 652 * accum_red_size - requested bits/red accum values, or zero 653 * accum_green_size - requested bits/green accum values, or zero 654 * accum_blue_size - requested bits/blue accum values, or zero 655 * accum_alpha_size - requested bits/alpha accum values, or zero 656 * num_samples - number of samples/pixel if multisampling, or zero 657 * level - visual level, usually 0 658 * visualCaveat - ala the GLX extension, usually GLX_NONE 659 * Return; a new XMesaVisual or 0 if error. 660 */ 661PUBLIC 662XMesaVisual XMesaCreateVisual( Display *display, 663 XVisualInfo * visinfo, 664 GLboolean rgb_flag, 665 GLboolean alpha_flag, 666 GLboolean db_flag, 667 GLboolean stereo_flag, 668 GLboolean ximage_flag, 669 GLint depth_size, 670 GLint stencil_size, 671 GLint accum_red_size, 672 GLint accum_green_size, 673 GLint accum_blue_size, 674 GLint accum_alpha_size, 675 GLint num_samples, 676 GLint level, 677 GLint visualCaveat ) 678{ 679 XMesaDisplay xmdpy = xmesa_init_display(display); 680 XMesaVisual v; 681 GLint red_bits, green_bits, blue_bits, alpha_bits; 682 683 if (!xmdpy) 684 return NULL; 685 686 /* For debugging only */ 687 if (_mesa_getenv("MESA_XSYNC")) { 688 /* This makes debugging X easier. 689 * In your debugger, set a breakpoint on _XError to stop when an 690 * X protocol error is generated. 691 */ 692 XSynchronize( display, 1 ); 693 } 694 695 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 696 if (!v) { 697 return NULL; 698 } 699 700 v->display = display; 701 702 /* Save a copy of the XVisualInfo struct because the user may Xfree() 703 * the struct but we may need some of the information contained in it 704 * at a later time. 705 */ 706 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 707 if (!v->visinfo) { 708 free(v); 709 return NULL; 710 } 711 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 712 713 v->ximage_flag = ximage_flag; 714 715 v->mesa_visual.redMask = visinfo->red_mask; 716 v->mesa_visual.greenMask = visinfo->green_mask; 717 v->mesa_visual.blueMask = visinfo->blue_mask; 718 v->visualID = visinfo->visualid; 719 v->screen = visinfo->screen; 720 721#if !(defined(__cplusplus) || defined(c_plusplus)) 722 v->visualType = xmesa_convert_from_x_visual_type(visinfo->class); 723#else 724 v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 725#endif 726 727 v->mesa_visual.visualRating = visualCaveat; 728 729 if (alpha_flag) 730 v->mesa_visual.alphaBits = 8; 731 732 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 733 734 { 735 const int xclass = v->visualType; 736 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 737 red_bits = _mesa_bitcount(GET_REDMASK(v)); 738 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 739 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 740 } 741 else { 742 /* this is an approximation */ 743 int depth; 744 depth = v->visinfo->depth; 745 red_bits = depth / 3; 746 depth -= red_bits; 747 green_bits = depth / 2; 748 depth -= green_bits; 749 blue_bits = depth; 750 alpha_bits = 0; 751 assert( red_bits + green_bits + blue_bits == v->visinfo->depth ); 752 } 753 alpha_bits = v->mesa_visual.alphaBits; 754 } 755 756 /* initialize visual */ 757 { 758 struct gl_config *vis = &v->mesa_visual; 759 760 vis->rgbMode = GL_TRUE; 761 vis->doubleBufferMode = db_flag; 762 vis->stereoMode = stereo_flag; 763 764 vis->redBits = red_bits; 765 vis->greenBits = green_bits; 766 vis->blueBits = blue_bits; 767 vis->alphaBits = alpha_bits; 768 vis->rgbBits = red_bits + green_bits + blue_bits; 769 770 vis->indexBits = 0; 771 vis->depthBits = depth_size; 772 vis->stencilBits = stencil_size; 773 774 vis->accumRedBits = accum_red_size; 775 vis->accumGreenBits = accum_green_size; 776 vis->accumBlueBits = accum_blue_size; 777 vis->accumAlphaBits = accum_alpha_size; 778 779 vis->haveAccumBuffer = accum_red_size > 0; 780 vis->haveDepthBuffer = depth_size > 0; 781 vis->haveStencilBuffer = stencil_size > 0; 782 783 vis->numAuxBuffers = 0; 784 vis->level = 0; 785 vis->sampleBuffers = 0; 786 vis->samples = 0; 787 } 788 789 v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK; 790 if (db_flag) 791 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK; 792 if (stereo_flag) { 793 v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK; 794 if (db_flag) 795 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK; 796 } 797 798 v->stvis.color_format = choose_pixel_format(v); 799 if (v->stvis.color_format == PIPE_FORMAT_NONE) { 800 FREE(v->visinfo); 801 FREE(v); 802 return NULL; 803 } 804 805 v->stvis.depth_stencil_format = 806 choose_depth_stencil_format(xmdpy, depth_size, stencil_size); 807 808 v->stvis.accum_format = (accum_red_size + 809 accum_green_size + accum_blue_size + accum_alpha_size) ? 810 PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE; 811 812 v->stvis.samples = num_samples; 813 v->stvis.render_buffer = ST_ATTACHMENT_INVALID; 814 815 /* XXX minor hack */ 816 v->mesa_visual.level = level; 817 return v; 818} 819 820 821PUBLIC 822void XMesaDestroyVisual( XMesaVisual v ) 823{ 824 free(v->visinfo); 825 free(v); 826} 827 828 829/** 830 * Return the informative name. 831 */ 832const char * 833xmesa_get_name(void) 834{ 835 return stapi->name; 836} 837 838 839/** 840 * Do per-display initializations. 841 */ 842void 843xmesa_init( Display *display ) 844{ 845 xmesa_init_display(display); 846} 847 848 849/** 850 * Create a new XMesaContext. 851 * \param v the XMesaVisual 852 * \param share_list another XMesaContext with which to share display 853 * lists or NULL if no sharing is wanted. 854 * \return an XMesaContext or NULL if error. 855 */ 856PUBLIC 857XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list, 858 GLuint major, GLuint minor, 859 GLuint profileMask, GLuint contextFlags) 860{ 861 XMesaDisplay xmdpy = xmesa_init_display(v->display); 862 struct st_context_attribs attribs; 863 XMesaContext c; 864 865 if (!xmdpy) 866 return NULL; 867 868 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */ 869 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 870 if (!c) 871 return NULL; 872 873 c->xm_visual = v; 874 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 875 c->xm_read_buffer = NULL; 876 877 memset(&attribs, 0, sizeof(attribs)); 878 attribs.profile = ST_PROFILE_DEFAULT; 879 attribs.visual = v->stvis; 880 attribs.major = major; 881 attribs.minor = minor; 882 if (contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) 883 attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE; 884 if (contextFlags & GLX_CONTEXT_DEBUG_BIT_ARB) 885 attribs.flags |= ST_CONTEXT_FLAG_DEBUG; 886 if (contextFlags & GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB) 887 attribs.flags |= ST_CONTEXT_FLAG_ROBUST_ACCESS; 888 if (profileMask & GLX_CONTEXT_CORE_PROFILE_BIT_ARB) 889 attribs.flags |= ST_CONTEXT_FLAG_CORE_PROFILE; 890 if (profileMask & GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) 891 attribs.flags |= ST_CONTEXT_FLAG_COMPATIBLE_PROFILE; 892 893 c->st = stapi->create_context(stapi, xmdpy->smapi, 894 &attribs, (share_list) ? share_list->st : NULL); 895 if (c->st == NULL) 896 goto fail; 897 898 c->st->st_manager_private = (void *) c; 899 900 return c; 901 902fail: 903 if (c->st) 904 c->st->destroy(c->st); 905 906 free(c); 907 return NULL; 908} 909 910 911 912PUBLIC 913void XMesaDestroyContext( XMesaContext c ) 914{ 915 c->st->destroy(c->st); 916 917 /* FIXME: We should destroy the screen here, but if we do so, surfaces may 918 * outlive it, causing segfaults 919 struct pipe_screen *screen = c->st->pipe->screen; 920 screen->destroy(screen); 921 */ 922 923 free(c); 924} 925 926 927 928/** 929 * Private function for creating an XMesaBuffer which corresponds to an 930 * X window or pixmap. 931 * \param v the window's XMesaVisual 932 * \param w the window we're wrapping 933 * \return new XMesaBuffer or NULL if error 934 */ 935PUBLIC XMesaBuffer 936XMesaCreateWindowBuffer(XMesaVisual v, Window w) 937{ 938 XWindowAttributes attr; 939 XMesaBuffer b; 940 Colormap cmap; 941 int depth; 942 943 assert(v); 944 assert(w); 945 946 /* Check that window depth matches visual depth */ 947 XGetWindowAttributes( v->display, w, &attr ); 948 depth = attr.depth; 949 if (v->visinfo->depth != depth) { 950 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 951 v->visinfo->depth, depth); 952 return NULL; 953 } 954 955 /* Find colormap */ 956 if (attr.colormap) { 957 cmap = attr.colormap; 958 } 959 else { 960 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 961 /* this is weird, a window w/out a colormap!? */ 962 /* OK, let's just allocate a new one and hope for the best */ 963 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 964 } 965 966 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap); 967 if (!b) 968 return NULL; 969 970 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 971 (Drawable) w, cmap )) { 972 xmesa_free_buffer(b); 973 return NULL; 974 } 975 976 return b; 977} 978 979 980 981/** 982 * Create a new XMesaBuffer from an X pixmap. 983 * 984 * \param v the XMesaVisual 985 * \param p the pixmap 986 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 987 * \c GLX_DIRECT_COLOR visual for the pixmap 988 * \returns new XMesaBuffer or NULL if error 989 */ 990PUBLIC XMesaBuffer 991XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap) 992{ 993 XMesaBuffer b; 994 995 assert(v); 996 997 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 998 if (!b) 999 return NULL; 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/** 1012 * For GLX_EXT_texture_from_pixmap 1013 */ 1014XMesaBuffer 1015XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p, 1016 Colormap cmap, 1017 int format, int target, int mipmap) 1018{ 1019 GET_CURRENT_CONTEXT(ctx); 1020 XMesaBuffer b; 1021 1022 assert(v); 1023 1024 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 1025 if (!b) 1026 return NULL; 1027 1028 /* get pixmap size */ 1029 xmesa_get_window_size(v->display, b, &b->width, &b->height); 1030 1031 if (target == 0) { 1032 /* examine dims */ 1033 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1034 target = GLX_TEXTURE_2D_EXT; 1035 } 1036 else if ( _mesa_bitcount(b->width) == 1 1037 && _mesa_bitcount(b->height) == 1) { 1038 /* power of two size */ 1039 if (b->height == 1) { 1040 target = GLX_TEXTURE_1D_EXT; 1041 } 1042 else { 1043 target = GLX_TEXTURE_2D_EXT; 1044 } 1045 } 1046 else if (ctx->Extensions.NV_texture_rectangle) { 1047 target = GLX_TEXTURE_RECTANGLE_EXT; 1048 } 1049 else { 1050 /* non power of two textures not supported */ 1051 XMesaDestroyBuffer(b); 1052 return 0; 1053 } 1054 } 1055 1056 b->TextureTarget = target; 1057 b->TextureFormat = format; 1058 b->TextureMipmap = mipmap; 1059 1060 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1061 (Drawable) p, cmap)) { 1062 xmesa_free_buffer(b); 1063 return NULL; 1064 } 1065 1066 return b; 1067} 1068 1069 1070 1071XMesaBuffer 1072XMesaCreatePBuffer(XMesaVisual v, Colormap cmap, 1073 unsigned int width, unsigned int height) 1074{ 1075 Window root; 1076 Drawable drawable; /* X Pixmap Drawable */ 1077 XMesaBuffer b; 1078 1079 /* allocate pixmap for front buffer */ 1080 root = RootWindow( v->display, v->visinfo->screen ); 1081 drawable = XCreatePixmap(v->display, root, width, height, 1082 v->visinfo->depth); 1083 if (!drawable) 1084 return NULL; 1085 1086 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1087 if (!b) 1088 return NULL; 1089 1090 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1091 drawable, cmap)) { 1092 xmesa_free_buffer(b); 1093 return NULL; 1094 } 1095 1096 return b; 1097} 1098 1099 1100 1101/* 1102 * Deallocate an XMesaBuffer structure and all related info. 1103 */ 1104PUBLIC void 1105XMesaDestroyBuffer(XMesaBuffer b) 1106{ 1107 xmesa_free_buffer(b); 1108} 1109 1110 1111/** 1112 * Notify the binding context to validate the buffer. 1113 */ 1114void 1115xmesa_notify_invalid_buffer(XMesaBuffer b) 1116{ 1117 p_atomic_inc(&b->stfb->stamp); 1118} 1119 1120 1121/** 1122 * Query the current drawable size and notify the binding context. 1123 */ 1124void 1125xmesa_check_buffer_size(XMesaBuffer b) 1126{ 1127 GLuint old_width, old_height; 1128 1129 if (b->type == PBUFFER) 1130 return; 1131 1132 old_width = b->width; 1133 old_height = b->height; 1134 1135 xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height); 1136 1137 if (b->width != old_width || b->height != old_height) 1138 xmesa_notify_invalid_buffer(b); 1139} 1140 1141 1142/* 1143 * Bind buffer b to context c and make c the current rendering context. 1144 */ 1145PUBLIC 1146GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1147 XMesaBuffer readBuffer ) 1148{ 1149 XMesaContext old_ctx = XMesaGetCurrentContext(); 1150 1151 if (old_ctx && old_ctx != c) { 1152 XMesaFlush(old_ctx); 1153 old_ctx->xm_buffer = NULL; 1154 old_ctx->xm_read_buffer = NULL; 1155 } 1156 1157 if (c) { 1158 if (!drawBuffer || !readBuffer) 1159 return GL_FALSE; /* must specify buffers! */ 1160 1161 if (c == old_ctx && 1162 c->xm_buffer == drawBuffer && 1163 c->xm_read_buffer == readBuffer) 1164 return GL_TRUE; 1165 1166 xmesa_check_buffer_size(drawBuffer); 1167 if (readBuffer != drawBuffer) 1168 xmesa_check_buffer_size(readBuffer); 1169 1170 c->xm_buffer = drawBuffer; 1171 c->xm_read_buffer = readBuffer; 1172 1173 stapi->make_current(stapi, c->st, drawBuffer->stfb, readBuffer->stfb); 1174 1175 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1176 drawBuffer->wasCurrent = GL_TRUE; 1177 } 1178 else { 1179 /* Detach */ 1180 stapi->make_current(stapi, NULL, NULL, NULL); 1181 1182 } 1183 return GL_TRUE; 1184} 1185 1186 1187/* 1188 * Unbind the context c from its buffer. 1189 */ 1190GLboolean XMesaUnbindContext( XMesaContext c ) 1191{ 1192 /* A no-op for XFree86 integration purposes */ 1193 return GL_TRUE; 1194} 1195 1196 1197XMesaContext XMesaGetCurrentContext( void ) 1198{ 1199 struct st_context_iface *st = stapi->get_current(stapi); 1200 return (XMesaContext) (st) ? st->st_manager_private : NULL; 1201} 1202 1203 1204 1205/** 1206 * Swap front and back color buffers and have winsys display front buffer. 1207 * If there's no front color buffer no swap actually occurs. 1208 */ 1209PUBLIC 1210void XMesaSwapBuffers( XMesaBuffer b ) 1211{ 1212 XMesaContext xmctx = XMesaGetCurrentContext(); 1213 1214 if (xmctx && xmctx->xm_buffer == b) { 1215 xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL); 1216 } 1217 1218 xmesa_swap_st_framebuffer(b->stfb); 1219} 1220 1221 1222 1223/* 1224 * Copy sub-region of back buffer to front buffer 1225 */ 1226void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1227{ 1228 xmesa_copy_st_framebuffer(b->stfb, 1229 ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT, 1230 x, y, width, height); 1231} 1232 1233 1234 1235void XMesaFlush( XMesaContext c ) 1236{ 1237 if (c && c->xm_visual->display) { 1238 XMesaDisplay xmdpy = xmesa_init_display(c->xm_visual->display); 1239 struct pipe_fence_handle *fence = NULL; 1240 1241 c->st->flush(c->st, ST_FLUSH_FRONT, &fence); 1242 if (fence) { 1243 xmdpy->screen->fence_finish(xmdpy->screen, fence, 1244 PIPE_TIMEOUT_INFINITE); 1245 xmdpy->screen->fence_reference(xmdpy->screen, &fence, NULL); 1246 } 1247 XFlush( c->xm_visual->display ); 1248 } 1249} 1250 1251 1252 1253 1254 1255XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d ) 1256{ 1257 XMesaBuffer b; 1258 for (b = XMesaBufferList; b; b = b->Next) { 1259 if (b->ws.drawable == d && b->xm_visual->display == dpy) { 1260 return b; 1261 } 1262 } 1263 return NULL; 1264} 1265 1266 1267/** 1268 * Free/destroy all XMesaBuffers associated with given display. 1269 */ 1270void xmesa_destroy_buffers_on_display(Display *dpy) 1271{ 1272 XMesaBuffer b, next; 1273 for (b = XMesaBufferList; b; b = next) { 1274 next = b->Next; 1275 if (b->xm_visual->display == dpy) { 1276 xmesa_free_buffer(b); 1277 /* delete head of list? */ 1278 if (XMesaBufferList == b) { 1279 XMesaBufferList = next; 1280 } 1281 } 1282 } 1283} 1284 1285 1286/* 1287 * Look for XMesaBuffers whose X window has been destroyed. 1288 * Deallocate any such XMesaBuffers. 1289 */ 1290void XMesaGarbageCollect( void ) 1291{ 1292 XMesaBuffer b, next; 1293 for (b=XMesaBufferList; b; b=next) { 1294 next = b->Next; 1295 if (b->xm_visual && 1296 b->xm_visual->display && 1297 b->ws.drawable && 1298 b->type == WINDOW) { 1299 XSync(b->xm_visual->display, False); 1300 if (!window_exists( b->xm_visual->display, b->ws.drawable )) { 1301 /* found a dead window, free the ancillary info */ 1302 XMesaDestroyBuffer( b ); 1303 } 1304 } 1305 } 1306} 1307 1308 1309 1310 1311PUBLIC void 1312XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer, 1313 const int *attrib_list) 1314{ 1315} 1316 1317 1318 1319PUBLIC void 1320XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer) 1321{ 1322} 1323 1324 1325void 1326XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask) 1327{ 1328 if (dst->st->copy) 1329 dst->st->copy(dst->st, src->st, mask); 1330} 1331