xm_api.c revision 38f89c7008b5ed9a70439f4e6590f00a4e220b10
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 63#include "xm_public.h" 64#include <GL/glx.h> 65 66 67/* Driver interface routines, set up by xlib backend on library 68 * _init(). These are global in the same way that function names are 69 * global. 70 */ 71static struct xm_driver driver; 72static struct st_api *stapi; 73 74/* Default strict invalidate to false. This means we will not call 75 * XGetGeometry after every swapbuffers, which allows swapbuffers to 76 * remain asynchronous. For apps running at 100fps with synchronous 77 * swapping, a 10% boost is typical. For gears, I see closer to 20% 78 * speedup. 79 * 80 * Note that the work of copying data on swapbuffers doesn't disappear 81 * - this change just allows the X server to execute the PutImage 82 * asynchronously without us effectively blocked until its completion. 83 * 84 * This speeds up even llvmpipe's threaded rasterization as the 85 * swapbuffers operation was a large part of the serial component of 86 * an llvmpipe frame. 87 * 88 * The downside of this is correctness - applications which don't call 89 * glViewport on window resizes will get incorrect rendering. A 90 * better solution would be to have per-frame but asynchronous 91 * invalidation. Xcb almost looks as if it could provide this, but 92 * the API doesn't seem to quite be there. 93 */ 94boolean xmesa_strict_invalidate = FALSE; 95 96void xmesa_set_driver( const struct xm_driver *templ ) 97{ 98 driver = *templ; 99 stapi = driver.create_st_api(); 100 101 xmesa_strict_invalidate = 102 debug_get_bool_option("XMESA_STRICT_INVALIDATE", FALSE); 103} 104 105 106/* 107 * XXX replace this with a linked list, or better yet, try to attach the 108 * gallium/mesa extra bits to the X Display object with XAddExtension(). 109 */ 110#define MAX_DISPLAYS 10 111static struct xmesa_display Displays[MAX_DISPLAYS]; 112static int NumDisplays = 0; 113 114static int 115xmesa_get_param(struct st_manager *smapi, 116 enum st_manager_param param) 117{ 118 switch(param) { 119 case ST_MANAGER_BROKEN_INVALIDATE: 120 return !xmesa_strict_invalidate; 121 default: 122 return 0; 123 } 124} 125 126static XMesaDisplay 127xmesa_init_display( Display *display ) 128{ 129 pipe_static_mutex(init_mutex); 130 XMesaDisplay xmdpy; 131 int i; 132 133 pipe_mutex_lock(init_mutex); 134 135 /* Look for XMesaDisplay which corresponds to 'display' */ 136 for (i = 0; i < NumDisplays; i++) { 137 if (Displays[i].display == display) { 138 /* Found it */ 139 pipe_mutex_unlock(init_mutex); 140 return &Displays[i]; 141 } 142 } 143 144 /* Create new XMesaDisplay */ 145 146 assert(NumDisplays < MAX_DISPLAYS); 147 xmdpy = &Displays[NumDisplays]; 148 NumDisplays++; 149 150 if (!xmdpy->display && display) { 151 xmdpy->display = display; 152 xmdpy->screen = driver.create_pipe_screen(display); 153 xmdpy->smapi = CALLOC_STRUCT(st_manager); 154 if (xmdpy->smapi) { 155 xmdpy->smapi->screen = xmdpy->screen; 156 xmdpy->smapi->get_param = xmesa_get_param; 157 } 158 159 if (xmdpy->screen && xmdpy->smapi) { 160 pipe_mutex_init(xmdpy->mutex); 161 } 162 else { 163 if (xmdpy->screen) { 164 xmdpy->screen->destroy(xmdpy->screen); 165 xmdpy->screen = NULL; 166 } 167 if (xmdpy->smapi) { 168 FREE(xmdpy->smapi); 169 xmdpy->smapi = NULL; 170 } 171 172 xmdpy->display = NULL; 173 } 174 } 175 if (!xmdpy->display || xmdpy->display != display) 176 xmdpy = NULL; 177 178 pipe_mutex_unlock(init_mutex); 179 180 return xmdpy; 181} 182 183/**********************************************************************/ 184/***** X Utility Functions *****/ 185/**********************************************************************/ 186 187 188/** 189 * Return the host's byte order as LSBFirst or MSBFirst ala X. 190 */ 191static int host_byte_order( void ) 192{ 193 int i = 1; 194 char *cptr = (char *) &i; 195 return (*cptr==1) ? LSBFirst : MSBFirst; 196} 197 198 199 200 201/** 202 * Return the true number of bits per pixel for XImages. 203 * For example, if we request a 24-bit deep visual we may actually need/get 204 * 32bpp XImages. This function returns the appropriate bpp. 205 * Input: dpy - the X display 206 * visinfo - desribes the visual to be used for XImages 207 * Return: true number of bits per pixel for XImages 208 */ 209static int 210bits_per_pixel( XMesaVisual xmv ) 211{ 212 Display *dpy = xmv->display; 213 XVisualInfo * visinfo = xmv->visinfo; 214 XImage *img; 215 int bitsPerPixel; 216 /* Create a temporary XImage */ 217 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 218 ZPixmap, 0, /*format, offset*/ 219 (char*) MALLOC(8), /*data*/ 220 1, 1, /*width, height*/ 221 32, /*bitmap_pad*/ 222 0 /*bytes_per_line*/ 223 ); 224 assert(img); 225 /* grab the bits/pixel value */ 226 bitsPerPixel = img->bits_per_pixel; 227 /* free the XImage */ 228 free( img->data ); 229 img->data = NULL; 230 XDestroyImage( img ); 231 return bitsPerPixel; 232} 233 234 235 236/* 237 * Determine if a given X window ID is valid (window exists). 238 * Do this by calling XGetWindowAttributes() for the window and 239 * checking if we catch an X error. 240 * Input: dpy - the display 241 * win - the window to check for existance 242 * Return: GL_TRUE - window exists 243 * GL_FALSE - window doesn't exist 244 */ 245static GLboolean WindowExistsFlag; 246 247static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr ) 248{ 249 (void) dpy; 250 if (xerr->error_code == BadWindow) { 251 WindowExistsFlag = GL_FALSE; 252 } 253 return 0; 254} 255 256static GLboolean window_exists( Display *dpy, Window win ) 257{ 258 XWindowAttributes wa; 259 int (*old_handler)( Display*, XErrorEvent* ); 260 WindowExistsFlag = GL_TRUE; 261 old_handler = XSetErrorHandler(window_exists_err_handler); 262 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 263 XSetErrorHandler(old_handler); 264 return WindowExistsFlag; 265} 266 267static Status 268get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height ) 269{ 270 Window root; 271 Status stat; 272 int xpos, ypos; 273 unsigned int w, h, bw, depth; 274 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 275 *width = w; 276 *height = h; 277 return stat; 278} 279 280 281/** 282 * Return the size of the window (or pixmap) that corresponds to the 283 * given XMesaBuffer. 284 * \param width returns width in pixels 285 * \param height returns height in pixels 286 */ 287void 288xmesa_get_window_size(Display *dpy, XMesaBuffer b, 289 GLuint *width, GLuint *height) 290{ 291 XMesaDisplay xmdpy = xmesa_init_display(dpy); 292 Status stat; 293 294 pipe_mutex_lock(xmdpy->mutex); 295 stat = get_drawable_size(dpy, b->ws.drawable, width, height); 296 pipe_mutex_unlock(xmdpy->mutex); 297 298 if (!stat) { 299 /* probably querying a window that's recently been destroyed */ 300 _mesa_warning(NULL, "XGetGeometry failed!\n"); 301 *width = *height = 1; 302 } 303} 304 305#define GET_REDMASK(__v) __v->mesa_visual.redMask 306#define GET_GREENMASK(__v) __v->mesa_visual.greenMask 307#define GET_BLUEMASK(__v) __v->mesa_visual.blueMask 308 309 310/** 311 * Choose the pixel format for the given visual. 312 * This will tell the gallium driver how to pack pixel data into 313 * drawing surfaces. 314 */ 315static GLuint 316choose_pixel_format(XMesaVisual v) 317{ 318 boolean native_byte_order = (host_byte_order() == 319 ImageByteOrder(v->display)); 320 321 if ( GET_REDMASK(v) == 0x0000ff 322 && GET_GREENMASK(v) == 0x00ff00 323 && GET_BLUEMASK(v) == 0xff0000 324 && v->BitsPerPixel == 32) { 325 if (native_byte_order) { 326 /* no byteswapping needed */ 327 return PIPE_FORMAT_R8G8B8A8_UNORM; 328 } 329 else { 330 return PIPE_FORMAT_A8B8G8R8_UNORM; 331 } 332 } 333 else if ( GET_REDMASK(v) == 0xff0000 334 && GET_GREENMASK(v) == 0x00ff00 335 && GET_BLUEMASK(v) == 0x0000ff 336 && v->BitsPerPixel == 32) { 337 if (native_byte_order) { 338 /* no byteswapping needed */ 339 return PIPE_FORMAT_B8G8R8A8_UNORM; 340 } 341 else { 342 return PIPE_FORMAT_A8R8G8B8_UNORM; 343 } 344 } 345 else if ( GET_REDMASK(v) == 0x0000ff00 346 && GET_GREENMASK(v) == 0x00ff0000 347 && GET_BLUEMASK(v) == 0xff000000 348 && v->BitsPerPixel == 32) { 349 if (native_byte_order) { 350 /* no byteswapping needed */ 351 return PIPE_FORMAT_A8R8G8B8_UNORM; 352 } 353 else { 354 return PIPE_FORMAT_B8G8R8A8_UNORM; 355 } 356 } 357 else if ( GET_REDMASK(v) == 0xf800 358 && GET_GREENMASK(v) == 0x07e0 359 && GET_BLUEMASK(v) == 0x001f 360 && native_byte_order 361 && v->BitsPerPixel == 16) { 362 /* 5-6-5 RGB */ 363 return PIPE_FORMAT_B5G6R5_UNORM; 364 } 365 366 return PIPE_FORMAT_NONE; 367} 368 369 370/** 371 * Choose a depth/stencil format that satisfies the given depth and 372 * stencil sizes. 373 */ 374static enum pipe_format 375choose_depth_stencil_format(XMesaDisplay xmdpy, int depth, int stencil) 376{ 377 const enum pipe_texture_target target = PIPE_TEXTURE_2D; 378 const unsigned tex_usage = PIPE_BIND_DEPTH_STENCIL; 379 const unsigned sample_count = 0; 380 enum pipe_format formats[8], fmt; 381 int count, i; 382 383 count = 0; 384 385 if (depth <= 16 && stencil == 0) { 386 formats[count++] = PIPE_FORMAT_Z16_UNORM; 387 } 388 if (depth <= 24 && stencil == 0) { 389 formats[count++] = PIPE_FORMAT_X8Z24_UNORM; 390 formats[count++] = PIPE_FORMAT_Z24X8_UNORM; 391 } 392 if (depth <= 24 && stencil <= 8) { 393 formats[count++] = PIPE_FORMAT_S8_USCALED_Z24_UNORM; 394 formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_USCALED; 395 } 396 if (depth <= 32 && stencil == 0) { 397 formats[count++] = PIPE_FORMAT_Z32_UNORM; 398 } 399 400 fmt = PIPE_FORMAT_NONE; 401 for (i = 0; i < count; i++) { 402 if (xmdpy->screen->is_format_supported(xmdpy->screen, formats[i], 403 target, sample_count, 404 tex_usage)) { 405 fmt = formats[i]; 406 break; 407 } 408 } 409 410 return fmt; 411} 412 413 414 415/**********************************************************************/ 416/***** Linked list of XMesaBuffers *****/ 417/**********************************************************************/ 418 419static XMesaBuffer XMesaBufferList = NULL; 420 421 422/** 423 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 424 * Note that XMesaBuffer is derived from struct gl_framebuffer. 425 * The new XMesaBuffer will not have any size (Width=Height=0). 426 * 427 * \param d the corresponding X drawable (window or pixmap) 428 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 429 * \param vis the buffer's visual 430 * \param cmap the window's colormap, if known. 431 * \return new XMesaBuffer or NULL if any problem 432 */ 433static XMesaBuffer 434create_xmesa_buffer(Drawable d, BufferType type, 435 XMesaVisual vis, Colormap cmap) 436{ 437 XMesaDisplay xmdpy = xmesa_init_display(vis->display); 438 XMesaBuffer b; 439 uint width, height; 440 441 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 442 443 if (!xmdpy) 444 return NULL; 445 446 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 447 if (!b) 448 return NULL; 449 450 b->ws.drawable = d; 451 b->ws.visual = vis->visinfo->visual; 452 b->ws.depth = vis->visinfo->depth; 453 454 b->xm_visual = vis; 455 b->type = type; 456 b->cmap = cmap; 457 458 get_drawable_size(vis->display, d, &width, &height); 459 460 /* 461 * Create framebuffer, but we'll plug in our own renderbuffers below. 462 */ 463 b->stfb = xmesa_create_st_framebuffer(xmdpy, b); 464 465 /* GLX_EXT_texture_from_pixmap */ 466 b->TextureTarget = 0; 467 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 468 b->TextureMipmap = 0; 469 470 /* insert buffer into linked list */ 471 b->Next = XMesaBufferList; 472 XMesaBufferList = b; 473 474 return b; 475} 476 477 478/** 479 * Find an XMesaBuffer by matching X display and colormap but NOT matching 480 * the notThis buffer. 481 */ 482XMesaBuffer 483xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis) 484{ 485 XMesaBuffer b; 486 for (b = XMesaBufferList; b; b = b->Next) { 487 if (b->xm_visual->display == dpy && 488 b->cmap == cmap && 489 b != notThis) { 490 return b; 491 } 492 } 493 return NULL; 494} 495 496 497/** 498 * Remove buffer from linked list, delete if no longer referenced. 499 */ 500static void 501xmesa_free_buffer(XMesaBuffer buffer) 502{ 503 XMesaBuffer prev = NULL, b; 504 505 for (b = XMesaBufferList; b; b = b->Next) { 506 if (b == buffer) { 507 /* unlink buffer from list */ 508 if (prev) 509 prev->Next = buffer->Next; 510 else 511 XMesaBufferList = buffer->Next; 512 513 /* Since the X window for the XMesaBuffer is going away, we don't 514 * want to dereference this pointer in the future. 515 */ 516 b->ws.drawable = 0; 517 518 /* XXX we should move the buffer to a delete-pending list and destroy 519 * the buffer until it is no longer current. 520 */ 521 xmesa_destroy_st_framebuffer(buffer->stfb); 522 523 free(buffer); 524 525 return; 526 } 527 /* continue search */ 528 prev = b; 529 } 530 /* buffer not found in XMesaBufferList */ 531 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 532} 533 534 535 536/**********************************************************************/ 537/***** Misc Private Functions *****/ 538/**********************************************************************/ 539 540 541/** 542 * When a context is bound for the first time, we can finally finish 543 * initializing the context's visual and buffer information. 544 * \param v the XMesaVisual to initialize 545 * \param b the XMesaBuffer to initialize (may be NULL) 546 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 547 * \param window the window/pixmap we're rendering into 548 * \param cmap the colormap associated with the window/pixmap 549 * \return GL_TRUE=success, GL_FALSE=failure 550 */ 551static GLboolean 552initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 553 GLboolean rgb_flag, Drawable window, 554 Colormap cmap) 555{ 556 ASSERT(!b || b->xm_visual == v); 557 558 /* Save true bits/pixel */ 559 v->BitsPerPixel = bits_per_pixel(v); 560 assert(v->BitsPerPixel > 0); 561 562 if (rgb_flag == GL_FALSE) { 563 /* COLOR-INDEXED WINDOW: not supported*/ 564 return GL_FALSE; 565 } 566 else { 567 /* RGB WINDOW: 568 * We support RGB rendering into almost any kind of visual. 569 */ 570 const int xclass = v->visualType; 571 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) { 572 _mesa_warning(NULL, 573 "XMesa: RGB mode rendering not supported in given visual.\n"); 574 return GL_FALSE; 575 } 576 v->mesa_visual.indexBits = 0; 577 578 if (v->BitsPerPixel == 32) { 579 /* We use XImages for all front/back buffers. If an X Window or 580 * X Pixmap is 32bpp, there's no guarantee that the alpha channel 581 * will be preserved. For XImages we're in luck. 582 */ 583 v->mesa_visual.alphaBits = 8; 584 } 585 } 586 587 /* 588 * If MESA_INFO env var is set print out some debugging info 589 * which can help Brian figure out what's going on when a user 590 * reports bugs. 591 */ 592 if (_mesa_getenv("MESA_INFO")) { 593 printf("X/Mesa visual = %p\n", (void *) v); 594 printf("X/Mesa level = %d\n", v->mesa_visual.level); 595 printf("X/Mesa depth = %d\n", v->visinfo->depth); 596 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 597 } 598 599 return GL_TRUE; 600} 601 602 603 604#define NUM_VISUAL_TYPES 6 605 606/** 607 * Convert an X visual type to a GLX visual type. 608 * 609 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 610 * to be converted. 611 * \return If \c visualType is a valid X visual type, a GLX visual type will 612 * be returned. Otherwise \c GLX_NONE will be returned. 613 * 614 * \note 615 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 616 * DRI CVS tree. 617 */ 618static GLint 619xmesa_convert_from_x_visual_type( int visualType ) 620{ 621 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 622 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 623 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 624 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 625 }; 626 627 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 628 ? glx_visual_types[ visualType ] : GLX_NONE; 629} 630 631 632/**********************************************************************/ 633/***** Public Functions *****/ 634/**********************************************************************/ 635 636 637/* 638 * Create a new X/Mesa visual. 639 * Input: display - X11 display 640 * visinfo - an XVisualInfo pointer 641 * rgb_flag - GL_TRUE = RGB mode, 642 * GL_FALSE = color index mode 643 * alpha_flag - alpha buffer requested? 644 * db_flag - GL_TRUE = double-buffered, 645 * GL_FALSE = single buffered 646 * stereo_flag - stereo visual? 647 * ximage_flag - GL_TRUE = use an XImage for back buffer, 648 * GL_FALSE = use an off-screen pixmap for back buffer 649 * depth_size - requested bits/depth values, or zero 650 * stencil_size - requested bits/stencil values, or zero 651 * accum_red_size - requested bits/red accum values, or zero 652 * accum_green_size - requested bits/green accum values, or zero 653 * accum_blue_size - requested bits/blue accum values, or zero 654 * accum_alpha_size - requested bits/alpha accum values, or zero 655 * num_samples - number of samples/pixel if multisampling, or zero 656 * level - visual level, usually 0 657 * visualCaveat - ala the GLX extension, usually GLX_NONE 658 * Return; a new XMesaVisual or 0 if error. 659 */ 660PUBLIC 661XMesaVisual XMesaCreateVisual( Display *display, 662 XVisualInfo * visinfo, 663 GLboolean rgb_flag, 664 GLboolean alpha_flag, 665 GLboolean db_flag, 666 GLboolean stereo_flag, 667 GLboolean ximage_flag, 668 GLint depth_size, 669 GLint stencil_size, 670 GLint accum_red_size, 671 GLint accum_green_size, 672 GLint accum_blue_size, 673 GLint accum_alpha_size, 674 GLint num_samples, 675 GLint level, 676 GLint visualCaveat ) 677{ 678 XMesaDisplay xmdpy = xmesa_init_display(display); 679 XMesaVisual v; 680 GLint red_bits, green_bits, blue_bits, alpha_bits; 681 682 if (!xmdpy) 683 return NULL; 684 685 /* For debugging only */ 686 if (_mesa_getenv("MESA_XSYNC")) { 687 /* This makes debugging X easier. 688 * In your debugger, set a breakpoint on _XError to stop when an 689 * X protocol error is generated. 690 */ 691 XSynchronize( display, 1 ); 692 } 693 694 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 695 if (!v) { 696 return NULL; 697 } 698 699 v->display = display; 700 701 /* Save a copy of the XVisualInfo struct because the user may Xfree() 702 * the struct but we may need some of the information contained in it 703 * at a later time. 704 */ 705 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 706 if (!v->visinfo) { 707 free(v); 708 return NULL; 709 } 710 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 711 712 v->ximage_flag = ximage_flag; 713 714 v->mesa_visual.redMask = visinfo->red_mask; 715 v->mesa_visual.greenMask = visinfo->green_mask; 716 v->mesa_visual.blueMask = visinfo->blue_mask; 717 v->visualID = visinfo->visualid; 718 v->screen = visinfo->screen; 719 720#if !(defined(__cplusplus) || defined(c_plusplus)) 721 v->visualType = xmesa_convert_from_x_visual_type(visinfo->class); 722#else 723 v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 724#endif 725 726 v->mesa_visual.visualRating = visualCaveat; 727 728 if (alpha_flag) 729 v->mesa_visual.alphaBits = 8; 730 731 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 732 733 { 734 const int xclass = v->visualType; 735 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 736 red_bits = _mesa_bitcount(GET_REDMASK(v)); 737 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 738 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 739 } 740 else { 741 /* this is an approximation */ 742 int depth; 743 depth = v->visinfo->depth; 744 red_bits = depth / 3; 745 depth -= red_bits; 746 green_bits = depth / 2; 747 depth -= green_bits; 748 blue_bits = depth; 749 alpha_bits = 0; 750 assert( red_bits + green_bits + blue_bits == v->visinfo->depth ); 751 } 752 alpha_bits = v->mesa_visual.alphaBits; 753 } 754 755 /* initialize visual */ 756 { 757 struct gl_config *vis = &v->mesa_visual; 758 759 vis->rgbMode = GL_TRUE; 760 vis->doubleBufferMode = db_flag; 761 vis->stereoMode = stereo_flag; 762 763 vis->redBits = red_bits; 764 vis->greenBits = green_bits; 765 vis->blueBits = blue_bits; 766 vis->alphaBits = alpha_bits; 767 vis->rgbBits = red_bits + green_bits + blue_bits; 768 769 vis->indexBits = 0; 770 vis->depthBits = depth_size; 771 vis->stencilBits = stencil_size; 772 773 vis->accumRedBits = accum_red_size; 774 vis->accumGreenBits = accum_green_size; 775 vis->accumBlueBits = accum_blue_size; 776 vis->accumAlphaBits = accum_alpha_size; 777 778 vis->haveAccumBuffer = accum_red_size > 0; 779 vis->haveDepthBuffer = depth_size > 0; 780 vis->haveStencilBuffer = stencil_size > 0; 781 782 vis->numAuxBuffers = 0; 783 vis->level = 0; 784 vis->sampleBuffers = 0; 785 vis->samples = 0; 786 } 787 788 v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK; 789 if (db_flag) 790 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK; 791 if (stereo_flag) { 792 v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK; 793 if (db_flag) 794 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK; 795 } 796 797 v->stvis.color_format = choose_pixel_format(v); 798 if (v->stvis.color_format == PIPE_FORMAT_NONE) { 799 FREE(v->visinfo); 800 FREE(v); 801 return NULL; 802 } 803 804 v->stvis.depth_stencil_format = 805 choose_depth_stencil_format(xmdpy, depth_size, stencil_size); 806 807 v->stvis.accum_format = (accum_red_size + 808 accum_green_size + accum_blue_size + accum_alpha_size) ? 809 PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE; 810 811 v->stvis.samples = num_samples; 812 v->stvis.render_buffer = ST_ATTACHMENT_INVALID; 813 814 /* XXX minor hack */ 815 v->mesa_visual.level = level; 816 return v; 817} 818 819 820PUBLIC 821void XMesaDestroyVisual( XMesaVisual v ) 822{ 823 free(v->visinfo); 824 free(v); 825} 826 827 828/** 829 * Return the informative name. 830 */ 831const char * 832xmesa_get_name(void) 833{ 834 return stapi->name; 835} 836 837 838/** 839 * Do per-display initializations. 840 */ 841void 842xmesa_init( Display *display ) 843{ 844 xmesa_init_display(display); 845} 846 847 848/** 849 * Create a new XMesaContext. 850 * \param v the XMesaVisual 851 * \param share_list another XMesaContext with which to share display 852 * lists or NULL if no sharing is wanted. 853 * \return an XMesaContext or NULL if error. 854 */ 855PUBLIC 856XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list, 857 GLuint major, GLuint minor, 858 GLuint profileMask, GLuint contextFlags) 859{ 860 XMesaDisplay xmdpy = xmesa_init_display(v->display); 861 struct st_context_attribs attribs; 862 XMesaContext c; 863 864 if (!xmdpy) 865 return NULL; 866 867 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */ 868 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 869 if (!c) 870 return NULL; 871 872 c->xm_visual = v; 873 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 874 c->xm_read_buffer = NULL; 875 876 memset(&attribs, 0, sizeof(attribs)); 877 attribs.profile = ST_PROFILE_DEFAULT; 878 attribs.visual = v->stvis; 879 attribs.major = major; 880 attribs.minor = minor; 881 if (contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) 882 attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE; 883 if (contextFlags & GLX_CONTEXT_DEBUG_BIT_ARB) 884 attribs.flags |= ST_CONTEXT_FLAG_DEBUG; 885 if (contextFlags & GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB) 886 attribs.flags |= ST_CONTEXT_FLAG_ROBUST_ACCESS; 887 if (profileMask & GLX_CONTEXT_CORE_PROFILE_BIT_ARB) 888 attribs.flags |= ST_CONTEXT_FLAG_CORE_PROFILE; 889 if (profileMask & GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) 890 attribs.flags |= ST_CONTEXT_FLAG_COMPATIBLE_PROFILE; 891 892 c->st = stapi->create_context(stapi, xmdpy->smapi, 893 &attribs, (share_list) ? share_list->st : NULL); 894 if (c->st == NULL) 895 goto fail; 896 897 c->st->st_manager_private = (void *) c; 898 899 return c; 900 901fail: 902 if (c->st) 903 c->st->destroy(c->st); 904 905 free(c); 906 return NULL; 907} 908 909 910 911PUBLIC 912void XMesaDestroyContext( XMesaContext c ) 913{ 914 c->st->destroy(c->st); 915 916 /* FIXME: We should destroy the screen here, but if we do so, surfaces may 917 * outlive it, causing segfaults 918 struct pipe_screen *screen = c->st->pipe->screen; 919 screen->destroy(screen); 920 */ 921 922 free(c); 923} 924 925 926 927/** 928 * Private function for creating an XMesaBuffer which corresponds to an 929 * X window or pixmap. 930 * \param v the window's XMesaVisual 931 * \param w the window we're wrapping 932 * \return new XMesaBuffer or NULL if error 933 */ 934PUBLIC XMesaBuffer 935XMesaCreateWindowBuffer(XMesaVisual v, Window w) 936{ 937 XWindowAttributes attr; 938 XMesaBuffer b; 939 Colormap cmap; 940 int depth; 941 942 assert(v); 943 assert(w); 944 945 /* Check that window depth matches visual depth */ 946 XGetWindowAttributes( v->display, w, &attr ); 947 depth = attr.depth; 948 if (v->visinfo->depth != depth) { 949 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 950 v->visinfo->depth, depth); 951 return NULL; 952 } 953 954 /* Find colormap */ 955 if (attr.colormap) { 956 cmap = attr.colormap; 957 } 958 else { 959 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 960 /* this is weird, a window w/out a colormap!? */ 961 /* OK, let's just allocate a new one and hope for the best */ 962 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 963 } 964 965 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap); 966 if (!b) 967 return NULL; 968 969 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 970 (Drawable) w, cmap )) { 971 xmesa_free_buffer(b); 972 return NULL; 973 } 974 975 return b; 976} 977 978 979 980/** 981 * Create a new XMesaBuffer from an X pixmap. 982 * 983 * \param v the XMesaVisual 984 * \param p the pixmap 985 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 986 * \c GLX_DIRECT_COLOR visual for the pixmap 987 * \returns new XMesaBuffer or NULL if error 988 */ 989PUBLIC XMesaBuffer 990XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap) 991{ 992 XMesaBuffer b; 993 994 assert(v); 995 996 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 997 if (!b) 998 return NULL; 999 1000 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1001 (Drawable) p, cmap)) { 1002 xmesa_free_buffer(b); 1003 return NULL; 1004 } 1005 1006 return b; 1007} 1008 1009 1010/** 1011 * For GLX_EXT_texture_from_pixmap 1012 */ 1013XMesaBuffer 1014XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p, 1015 Colormap cmap, 1016 int format, int target, int mipmap) 1017{ 1018 GET_CURRENT_CONTEXT(ctx); 1019 XMesaBuffer b; 1020 1021 assert(v); 1022 1023 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 1024 if (!b) 1025 return NULL; 1026 1027 /* get pixmap size */ 1028 xmesa_get_window_size(v->display, b, &b->width, &b->height); 1029 1030 if (target == 0) { 1031 /* examine dims */ 1032 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1033 target = GLX_TEXTURE_2D_EXT; 1034 } 1035 else if ( _mesa_bitcount(b->width) == 1 1036 && _mesa_bitcount(b->height) == 1) { 1037 /* power of two size */ 1038 if (b->height == 1) { 1039 target = GLX_TEXTURE_1D_EXT; 1040 } 1041 else { 1042 target = GLX_TEXTURE_2D_EXT; 1043 } 1044 } 1045 else if (ctx->Extensions.NV_texture_rectangle) { 1046 target = GLX_TEXTURE_RECTANGLE_EXT; 1047 } 1048 else { 1049 /* non power of two textures not supported */ 1050 XMesaDestroyBuffer(b); 1051 return 0; 1052 } 1053 } 1054 1055 b->TextureTarget = target; 1056 b->TextureFormat = format; 1057 b->TextureMipmap = mipmap; 1058 1059 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1060 (Drawable) p, cmap)) { 1061 xmesa_free_buffer(b); 1062 return NULL; 1063 } 1064 1065 return b; 1066} 1067 1068 1069 1070XMesaBuffer 1071XMesaCreatePBuffer(XMesaVisual v, Colormap cmap, 1072 unsigned int width, unsigned int height) 1073{ 1074 Window root; 1075 Drawable drawable; /* X Pixmap Drawable */ 1076 XMesaBuffer b; 1077 1078 /* allocate pixmap for front buffer */ 1079 root = RootWindow( v->display, v->visinfo->screen ); 1080 drawable = XCreatePixmap(v->display, root, width, height, 1081 v->visinfo->depth); 1082 if (!drawable) 1083 return NULL; 1084 1085 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1086 if (!b) 1087 return NULL; 1088 1089 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1090 drawable, cmap)) { 1091 xmesa_free_buffer(b); 1092 return NULL; 1093 } 1094 1095 return b; 1096} 1097 1098 1099 1100/* 1101 * Deallocate an XMesaBuffer structure and all related info. 1102 */ 1103PUBLIC void 1104XMesaDestroyBuffer(XMesaBuffer b) 1105{ 1106 xmesa_free_buffer(b); 1107} 1108 1109 1110/** 1111 * Notify the binding context to validate the buffer. 1112 */ 1113void 1114xmesa_notify_invalid_buffer(XMesaBuffer b) 1115{ 1116 XMesaContext xmctx = XMesaGetCurrentContext(); 1117 1118 if (xmctx && xmctx->xm_buffer == b) 1119 xmctx->st->notify_invalid_framebuffer(xmctx->st, b->stfb); 1120} 1121 1122 1123/** 1124 * Query the current drawable size and notify the binding context. 1125 */ 1126void 1127xmesa_check_buffer_size(XMesaBuffer b) 1128{ 1129 if (b->type == PBUFFER) 1130 return; 1131 1132 xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height); 1133 xmesa_notify_invalid_buffer(b); 1134} 1135 1136 1137/* 1138 * Bind buffer b to context c and make c the current rendering context. 1139 */ 1140PUBLIC 1141GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1142 XMesaBuffer readBuffer ) 1143{ 1144 XMesaContext old_ctx = XMesaGetCurrentContext(); 1145 1146 if (old_ctx && old_ctx != c) { 1147 XMesaFlush(old_ctx); 1148 old_ctx->xm_buffer = NULL; 1149 old_ctx->xm_read_buffer = NULL; 1150 } 1151 1152 if (c) { 1153 if (!drawBuffer || !readBuffer) 1154 return GL_FALSE; /* must specify buffers! */ 1155 1156 if (c == old_ctx && 1157 c->xm_buffer == drawBuffer && 1158 c->xm_read_buffer == readBuffer) 1159 return GL_TRUE; 1160 1161 xmesa_check_buffer_size(drawBuffer); 1162 if (readBuffer != drawBuffer) 1163 xmesa_check_buffer_size(readBuffer); 1164 1165 c->xm_buffer = drawBuffer; 1166 c->xm_read_buffer = readBuffer; 1167 1168 stapi->make_current(stapi, c->st, drawBuffer->stfb, readBuffer->stfb); 1169 1170 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1171 drawBuffer->wasCurrent = GL_TRUE; 1172 } 1173 else { 1174 /* Detach */ 1175 stapi->make_current(stapi, NULL, NULL, NULL); 1176 1177 } 1178 return GL_TRUE; 1179} 1180 1181 1182/* 1183 * Unbind the context c from its buffer. 1184 */ 1185GLboolean XMesaUnbindContext( XMesaContext c ) 1186{ 1187 /* A no-op for XFree86 integration purposes */ 1188 return GL_TRUE; 1189} 1190 1191 1192XMesaContext XMesaGetCurrentContext( void ) 1193{ 1194 struct st_context_iface *st = stapi->get_current(stapi); 1195 return (XMesaContext) (st) ? st->st_manager_private : NULL; 1196} 1197 1198 1199 1200/** 1201 * Swap front and back color buffers and have winsys display front buffer. 1202 * If there's no front color buffer no swap actually occurs. 1203 */ 1204PUBLIC 1205void XMesaSwapBuffers( XMesaBuffer b ) 1206{ 1207 XMesaContext xmctx = XMesaGetCurrentContext(); 1208 1209 if (xmctx && xmctx->xm_buffer == b) { 1210 xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL); 1211 } 1212 1213 xmesa_swap_st_framebuffer(b->stfb); 1214} 1215 1216 1217 1218/* 1219 * Copy sub-region of back buffer to front buffer 1220 */ 1221void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1222{ 1223 xmesa_copy_st_framebuffer(b->stfb, 1224 ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT, 1225 x, y, width, height); 1226} 1227 1228 1229 1230void XMesaFlush( XMesaContext c ) 1231{ 1232 if (c && c->xm_visual->display) { 1233 XMesaDisplay xmdpy = xmesa_init_display(c->xm_visual->display); 1234 struct pipe_fence_handle *fence = NULL; 1235 1236 c->st->flush(c->st, ST_FLUSH_FRONT, &fence); 1237 if (fence) { 1238 xmdpy->screen->fence_finish(xmdpy->screen, fence, 1239 PIPE_TIMEOUT_INFINITE); 1240 xmdpy->screen->fence_reference(xmdpy->screen, &fence, NULL); 1241 } 1242 XFlush( c->xm_visual->display ); 1243 } 1244} 1245 1246 1247 1248 1249 1250XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d ) 1251{ 1252 XMesaBuffer b; 1253 for (b = XMesaBufferList; b; b = b->Next) { 1254 if (b->ws.drawable == d && b->xm_visual->display == dpy) { 1255 return b; 1256 } 1257 } 1258 return NULL; 1259} 1260 1261 1262/** 1263 * Free/destroy all XMesaBuffers associated with given display. 1264 */ 1265void xmesa_destroy_buffers_on_display(Display *dpy) 1266{ 1267 XMesaBuffer b, next; 1268 for (b = XMesaBufferList; b; b = next) { 1269 next = b->Next; 1270 if (b->xm_visual->display == dpy) { 1271 xmesa_free_buffer(b); 1272 /* delete head of list? */ 1273 if (XMesaBufferList == b) { 1274 XMesaBufferList = next; 1275 } 1276 } 1277 } 1278} 1279 1280 1281/* 1282 * Look for XMesaBuffers whose X window has been destroyed. 1283 * Deallocate any such XMesaBuffers. 1284 */ 1285void XMesaGarbageCollect( void ) 1286{ 1287 XMesaBuffer b, next; 1288 for (b=XMesaBufferList; b; b=next) { 1289 next = b->Next; 1290 if (b->xm_visual && 1291 b->xm_visual->display && 1292 b->ws.drawable && 1293 b->type == WINDOW) { 1294 XSync(b->xm_visual->display, False); 1295 if (!window_exists( b->xm_visual->display, b->ws.drawable )) { 1296 /* found a dead window, free the ancillary info */ 1297 XMesaDestroyBuffer( b ); 1298 } 1299 } 1300 } 1301} 1302 1303 1304 1305 1306PUBLIC void 1307XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer, 1308 const int *attrib_list) 1309{ 1310} 1311 1312 1313 1314PUBLIC void 1315XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer) 1316{ 1317} 1318 1319 1320void 1321XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask) 1322{ 1323 if (dst->st->copy) 1324 dst->st->copy(dst->st, src->st, mask); 1325} 1326