xm_api.c revision d3491e775fb07f891463b2185d74bbad62f3ed24
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 geom_flags = (PIPE_TEXTURE_GEOM_NON_SQUARE | 380 PIPE_TEXTURE_GEOM_NON_POWER_OF_TWO); 381 const unsigned sample_count = 0; 382 enum pipe_format formats[8], fmt; 383 int count, i; 384 385 count = 0; 386 387 if (depth <= 16 && stencil == 0) { 388 formats[count++] = PIPE_FORMAT_Z16_UNORM; 389 } 390 if (depth <= 24 && stencil == 0) { 391 formats[count++] = PIPE_FORMAT_X8Z24_UNORM; 392 formats[count++] = PIPE_FORMAT_Z24X8_UNORM; 393 } 394 if (depth <= 24 && stencil <= 8) { 395 formats[count++] = PIPE_FORMAT_S8_USCALED_Z24_UNORM; 396 formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_USCALED; 397 } 398 if (depth <= 32 && stencil == 0) { 399 formats[count++] = PIPE_FORMAT_Z32_UNORM; 400 } 401 402 fmt = PIPE_FORMAT_NONE; 403 for (i = 0; i < count; i++) { 404 if (xmdpy->screen->is_format_supported(xmdpy->screen, formats[i], 405 target, sample_count, 406 tex_usage, geom_flags)) { 407 fmt = formats[i]; 408 break; 409 } 410 } 411 412 return fmt; 413} 414 415 416 417/**********************************************************************/ 418/***** Linked list of XMesaBuffers *****/ 419/**********************************************************************/ 420 421static XMesaBuffer XMesaBufferList = NULL; 422 423 424/** 425 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 426 * Note that XMesaBuffer is derived from GLframebuffer. 427 * The new XMesaBuffer will not have any size (Width=Height=0). 428 * 429 * \param d the corresponding X drawable (window or pixmap) 430 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 431 * \param vis the buffer's visual 432 * \param cmap the window's colormap, if known. 433 * \return new XMesaBuffer or NULL if any problem 434 */ 435static XMesaBuffer 436create_xmesa_buffer(Drawable d, BufferType type, 437 XMesaVisual vis, Colormap cmap) 438{ 439 XMesaDisplay xmdpy = xmesa_init_display(vis->display); 440 XMesaBuffer b; 441 uint width, height; 442 443 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 444 445 if (!xmdpy) 446 return NULL; 447 448 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 449 if (!b) 450 return NULL; 451 452 b->ws.drawable = d; 453 b->ws.visual = vis->visinfo->visual; 454 b->ws.depth = vis->visinfo->depth; 455 456 b->xm_visual = vis; 457 b->type = type; 458 b->cmap = cmap; 459 460 get_drawable_size(vis->display, d, &width, &height); 461 462 /* 463 * Create framebuffer, but we'll plug in our own renderbuffers below. 464 */ 465 b->stfb = xmesa_create_st_framebuffer(xmdpy, b); 466 467 /* GLX_EXT_texture_from_pixmap */ 468 b->TextureTarget = 0; 469 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 470 b->TextureMipmap = 0; 471 472 /* insert buffer into linked list */ 473 b->Next = XMesaBufferList; 474 XMesaBufferList = b; 475 476 return b; 477} 478 479 480/** 481 * Find an XMesaBuffer by matching X display and colormap but NOT matching 482 * the notThis buffer. 483 */ 484XMesaBuffer 485xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis) 486{ 487 XMesaBuffer b; 488 for (b = XMesaBufferList; b; b = b->Next) { 489 if (b->xm_visual->display == dpy && 490 b->cmap == cmap && 491 b != notThis) { 492 return b; 493 } 494 } 495 return NULL; 496} 497 498 499/** 500 * Remove buffer from linked list, delete if no longer referenced. 501 */ 502static void 503xmesa_free_buffer(XMesaBuffer buffer) 504{ 505 XMesaBuffer prev = NULL, b; 506 507 for (b = XMesaBufferList; b; b = b->Next) { 508 if (b == buffer) { 509 /* unlink buffer from list */ 510 if (prev) 511 prev->Next = buffer->Next; 512 else 513 XMesaBufferList = buffer->Next; 514 515 /* Since the X window for the XMesaBuffer is going away, we don't 516 * want to dereference this pointer in the future. 517 */ 518 b->ws.drawable = 0; 519 520 /* XXX we should move the buffer to a delete-pending list and destroy 521 * the buffer until it is no longer current. 522 */ 523 xmesa_destroy_st_framebuffer(buffer->stfb); 524 525 free(buffer); 526 527 return; 528 } 529 /* continue search */ 530 prev = b; 531 } 532 /* buffer not found in XMesaBufferList */ 533 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 534} 535 536 537 538/**********************************************************************/ 539/***** Misc Private Functions *****/ 540/**********************************************************************/ 541 542 543/** 544 * When a context is bound for the first time, we can finally finish 545 * initializing the context's visual and buffer information. 546 * \param v the XMesaVisual to initialize 547 * \param b the XMesaBuffer to initialize (may be NULL) 548 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 549 * \param window the window/pixmap we're rendering into 550 * \param cmap the colormap associated with the window/pixmap 551 * \return GL_TRUE=success, GL_FALSE=failure 552 */ 553static GLboolean 554initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 555 GLboolean rgb_flag, Drawable window, 556 Colormap cmap) 557{ 558 ASSERT(!b || b->xm_visual == v); 559 560 /* Save true bits/pixel */ 561 v->BitsPerPixel = bits_per_pixel(v); 562 assert(v->BitsPerPixel > 0); 563 564 if (rgb_flag == GL_FALSE) { 565 /* COLOR-INDEXED WINDOW: not supported*/ 566 return GL_FALSE; 567 } 568 else { 569 /* RGB WINDOW: 570 * We support RGB rendering into almost any kind of visual. 571 */ 572 const int xclass = v->visualType; 573 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) { 574 _mesa_warning(NULL, 575 "XMesa: RGB mode rendering not supported in given visual.\n"); 576 return GL_FALSE; 577 } 578 v->mesa_visual.indexBits = 0; 579 580 if (v->BitsPerPixel == 32) { 581 /* We use XImages for all front/back buffers. If an X Window or 582 * X Pixmap is 32bpp, there's no guarantee that the alpha channel 583 * will be preserved. For XImages we're in luck. 584 */ 585 v->mesa_visual.alphaBits = 8; 586 } 587 } 588 589 /* 590 * If MESA_INFO env var is set print out some debugging info 591 * which can help Brian figure out what's going on when a user 592 * reports bugs. 593 */ 594 if (_mesa_getenv("MESA_INFO")) { 595 printf("X/Mesa visual = %p\n", (void *) v); 596 printf("X/Mesa level = %d\n", v->mesa_visual.level); 597 printf("X/Mesa depth = %d\n", v->visinfo->depth); 598 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 599 } 600 601 return GL_TRUE; 602} 603 604 605 606#define NUM_VISUAL_TYPES 6 607 608/** 609 * Convert an X visual type to a GLX visual type. 610 * 611 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 612 * to be converted. 613 * \return If \c visualType is a valid X visual type, a GLX visual type will 614 * be returned. Otherwise \c GLX_NONE will be returned. 615 * 616 * \note 617 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 618 * DRI CVS tree. 619 */ 620static GLint 621xmesa_convert_from_x_visual_type( int visualType ) 622{ 623 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 624 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 625 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 626 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 627 }; 628 629 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 630 ? glx_visual_types[ visualType ] : GLX_NONE; 631} 632 633 634/**********************************************************************/ 635/***** Public Functions *****/ 636/**********************************************************************/ 637 638 639/* 640 * Create a new X/Mesa visual. 641 * Input: display - X11 display 642 * visinfo - an XVisualInfo pointer 643 * rgb_flag - GL_TRUE = RGB mode, 644 * GL_FALSE = color index mode 645 * alpha_flag - alpha buffer requested? 646 * db_flag - GL_TRUE = double-buffered, 647 * GL_FALSE = single buffered 648 * stereo_flag - stereo visual? 649 * ximage_flag - GL_TRUE = use an XImage for back buffer, 650 * GL_FALSE = use an off-screen pixmap for back buffer 651 * depth_size - requested bits/depth values, or zero 652 * stencil_size - requested bits/stencil values, or zero 653 * accum_red_size - requested bits/red accum values, or zero 654 * accum_green_size - requested bits/green accum values, or zero 655 * accum_blue_size - requested bits/blue accum values, or zero 656 * accum_alpha_size - requested bits/alpha accum values, or zero 657 * num_samples - number of samples/pixel if multisampling, or zero 658 * level - visual level, usually 0 659 * visualCaveat - ala the GLX extension, usually GLX_NONE 660 * Return; a new XMesaVisual or 0 if error. 661 */ 662PUBLIC 663XMesaVisual XMesaCreateVisual( Display *display, 664 XVisualInfo * visinfo, 665 GLboolean rgb_flag, 666 GLboolean alpha_flag, 667 GLboolean db_flag, 668 GLboolean stereo_flag, 669 GLboolean ximage_flag, 670 GLint depth_size, 671 GLint stencil_size, 672 GLint accum_red_size, 673 GLint accum_green_size, 674 GLint accum_blue_size, 675 GLint accum_alpha_size, 676 GLint num_samples, 677 GLint level, 678 GLint visualCaveat ) 679{ 680 XMesaDisplay xmdpy = xmesa_init_display(display); 681 XMesaVisual v; 682 GLint red_bits, green_bits, blue_bits, alpha_bits; 683 684 if (!xmdpy) 685 return NULL; 686 687 /* For debugging only */ 688 if (_mesa_getenv("MESA_XSYNC")) { 689 /* This makes debugging X easier. 690 * In your debugger, set a breakpoint on _XError to stop when an 691 * X protocol error is generated. 692 */ 693 XSynchronize( display, 1 ); 694 } 695 696 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 697 if (!v) { 698 return NULL; 699 } 700 701 v->display = display; 702 703 /* Save a copy of the XVisualInfo struct because the user may Xfree() 704 * the struct but we may need some of the information contained in it 705 * at a later time. 706 */ 707 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 708 if (!v->visinfo) { 709 free(v); 710 return NULL; 711 } 712 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 713 714 v->ximage_flag = ximage_flag; 715 716 v->mesa_visual.redMask = visinfo->red_mask; 717 v->mesa_visual.greenMask = visinfo->green_mask; 718 v->mesa_visual.blueMask = visinfo->blue_mask; 719 v->visualID = visinfo->visualid; 720 v->screen = visinfo->screen; 721 722#if !(defined(__cplusplus) || defined(c_plusplus)) 723 v->visualType = xmesa_convert_from_x_visual_type(visinfo->class); 724#else 725 v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 726#endif 727 728 v->mesa_visual.visualRating = visualCaveat; 729 730 if (alpha_flag) 731 v->mesa_visual.alphaBits = 8; 732 733 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 734 735 { 736 const int xclass = v->visualType; 737 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 738 red_bits = _mesa_bitcount(GET_REDMASK(v)); 739 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 740 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 741 } 742 else { 743 /* this is an approximation */ 744 int depth; 745 depth = v->visinfo->depth; 746 red_bits = depth / 3; 747 depth -= red_bits; 748 green_bits = depth / 2; 749 depth -= green_bits; 750 blue_bits = depth; 751 alpha_bits = 0; 752 assert( red_bits + green_bits + blue_bits == v->visinfo->depth ); 753 } 754 alpha_bits = v->mesa_visual.alphaBits; 755 } 756 757 /* initialize visual */ 758 { 759 struct gl_config *vis = &v->mesa_visual; 760 761 vis->rgbMode = GL_TRUE; 762 vis->doubleBufferMode = db_flag; 763 vis->stereoMode = stereo_flag; 764 765 vis->redBits = red_bits; 766 vis->greenBits = green_bits; 767 vis->blueBits = blue_bits; 768 vis->alphaBits = alpha_bits; 769 vis->rgbBits = red_bits + green_bits + blue_bits; 770 771 vis->indexBits = 0; 772 vis->depthBits = depth_size; 773 vis->stencilBits = stencil_size; 774 775 vis->accumRedBits = accum_red_size; 776 vis->accumGreenBits = accum_green_size; 777 vis->accumBlueBits = accum_blue_size; 778 vis->accumAlphaBits = accum_alpha_size; 779 780 vis->haveAccumBuffer = accum_red_size > 0; 781 vis->haveDepthBuffer = depth_size > 0; 782 vis->haveStencilBuffer = stencil_size > 0; 783 784 vis->numAuxBuffers = 0; 785 vis->level = 0; 786 vis->sampleBuffers = 0; 787 vis->samples = 0; 788 } 789 790 v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK; 791 if (db_flag) 792 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK; 793 if (stereo_flag) { 794 v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK; 795 if (db_flag) 796 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK; 797 } 798 799 v->stvis.color_format = choose_pixel_format(v); 800 if (v->stvis.color_format == PIPE_FORMAT_NONE) { 801 FREE(v->visinfo); 802 FREE(v); 803 return NULL; 804 } 805 806 v->stvis.depth_stencil_format = 807 choose_depth_stencil_format(xmdpy, depth_size, stencil_size); 808 809 v->stvis.accum_format = (accum_red_size + 810 accum_green_size + accum_blue_size + accum_alpha_size) ? 811 PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE; 812 813 v->stvis.samples = num_samples; 814 v->stvis.render_buffer = ST_ATTACHMENT_INVALID; 815 816 /* XXX minor hack */ 817 v->mesa_visual.level = level; 818 return v; 819} 820 821 822PUBLIC 823void XMesaDestroyVisual( XMesaVisual v ) 824{ 825 free(v->visinfo); 826 free(v); 827} 828 829 830/** 831 * Do per-display initializations. 832 */ 833void 834xmesa_init( Display *display ) 835{ 836 xmesa_init_display(display); 837} 838 839 840/** 841 * Create a new XMesaContext. 842 * \param v the XMesaVisual 843 * \param share_list another XMesaContext with which to share display 844 * lists or NULL if no sharing is wanted. 845 * \return an XMesaContext or NULL if error. 846 */ 847PUBLIC 848XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 849{ 850 XMesaDisplay xmdpy = xmesa_init_display(v->display); 851 struct st_context_attribs attribs; 852 XMesaContext c; 853 854 if (!xmdpy) 855 return NULL; 856 857 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 858 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 859 if (!c) 860 return NULL; 861 862 c->xm_visual = v; 863 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 864 c->xm_read_buffer = NULL; 865 866 memset(&attribs, 0, sizeof(attribs)); 867 attribs.profile = ST_PROFILE_DEFAULT; 868 attribs.visual = v->stvis; 869 870 c->st = stapi->create_context(stapi, xmdpy->smapi, 871 &attribs, (share_list) ? share_list->st : NULL); 872 if (c->st == NULL) 873 goto fail; 874 875 c->st->st_manager_private = (void *) c; 876 877 return c; 878 879fail: 880 if (c->st) 881 c->st->destroy(c->st); 882 883 free(c); 884 return NULL; 885} 886 887 888 889PUBLIC 890void XMesaDestroyContext( XMesaContext c ) 891{ 892 c->st->destroy(c->st); 893 894 /* FIXME: We should destroy the screen here, but if we do so, surfaces may 895 * outlive it, causing segfaults 896 struct pipe_screen *screen = c->st->pipe->screen; 897 screen->destroy(screen); 898 */ 899 900 free(c); 901} 902 903 904 905/** 906 * Private function for creating an XMesaBuffer which corresponds to an 907 * X window or pixmap. 908 * \param v the window's XMesaVisual 909 * \param w the window we're wrapping 910 * \return new XMesaBuffer or NULL if error 911 */ 912PUBLIC XMesaBuffer 913XMesaCreateWindowBuffer(XMesaVisual v, Window w) 914{ 915 XWindowAttributes attr; 916 XMesaBuffer b; 917 Colormap cmap; 918 int depth; 919 920 assert(v); 921 assert(w); 922 923 /* Check that window depth matches visual depth */ 924 XGetWindowAttributes( v->display, w, &attr ); 925 depth = attr.depth; 926 if (v->visinfo->depth != depth) { 927 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 928 v->visinfo->depth, depth); 929 return NULL; 930 } 931 932 /* Find colormap */ 933 if (attr.colormap) { 934 cmap = attr.colormap; 935 } 936 else { 937 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 938 /* this is weird, a window w/out a colormap!? */ 939 /* OK, let's just allocate a new one and hope for the best */ 940 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 941 } 942 943 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap); 944 if (!b) 945 return NULL; 946 947 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 948 (Drawable) w, cmap )) { 949 xmesa_free_buffer(b); 950 return NULL; 951 } 952 953 return b; 954} 955 956 957 958/** 959 * Create a new XMesaBuffer from an X pixmap. 960 * 961 * \param v the XMesaVisual 962 * \param p the pixmap 963 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 964 * \c GLX_DIRECT_COLOR visual for the pixmap 965 * \returns new XMesaBuffer or NULL if error 966 */ 967PUBLIC XMesaBuffer 968XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap) 969{ 970 XMesaBuffer b; 971 972 assert(v); 973 974 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 975 if (!b) 976 return NULL; 977 978 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 979 (Drawable) p, cmap)) { 980 xmesa_free_buffer(b); 981 return NULL; 982 } 983 984 return b; 985} 986 987 988/** 989 * For GLX_EXT_texture_from_pixmap 990 */ 991XMesaBuffer 992XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p, 993 Colormap cmap, 994 int format, int target, int mipmap) 995{ 996 GET_CURRENT_CONTEXT(ctx); 997 XMesaBuffer b; 998 999 assert(v); 1000 1001 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 1002 if (!b) 1003 return NULL; 1004 1005 /* get pixmap size */ 1006 xmesa_get_window_size(v->display, b, &b->width, &b->height); 1007 1008 if (target == 0) { 1009 /* examine dims */ 1010 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1011 target = GLX_TEXTURE_2D_EXT; 1012 } 1013 else if ( _mesa_bitcount(b->width) == 1 1014 && _mesa_bitcount(b->height) == 1) { 1015 /* power of two size */ 1016 if (b->height == 1) { 1017 target = GLX_TEXTURE_1D_EXT; 1018 } 1019 else { 1020 target = GLX_TEXTURE_2D_EXT; 1021 } 1022 } 1023 else if (ctx->Extensions.NV_texture_rectangle) { 1024 target = GLX_TEXTURE_RECTANGLE_EXT; 1025 } 1026 else { 1027 /* non power of two textures not supported */ 1028 XMesaDestroyBuffer(b); 1029 return 0; 1030 } 1031 } 1032 1033 b->TextureTarget = target; 1034 b->TextureFormat = format; 1035 b->TextureMipmap = mipmap; 1036 1037 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1038 (Drawable) p, cmap)) { 1039 xmesa_free_buffer(b); 1040 return NULL; 1041 } 1042 1043 return b; 1044} 1045 1046 1047 1048XMesaBuffer 1049XMesaCreatePBuffer(XMesaVisual v, Colormap cmap, 1050 unsigned int width, unsigned int height) 1051{ 1052 Window root; 1053 Drawable drawable; /* X Pixmap Drawable */ 1054 XMesaBuffer b; 1055 1056 /* allocate pixmap for front buffer */ 1057 root = RootWindow( v->display, v->visinfo->screen ); 1058 drawable = XCreatePixmap(v->display, root, width, height, 1059 v->visinfo->depth); 1060 if (!drawable) 1061 return NULL; 1062 1063 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1064 if (!b) 1065 return NULL; 1066 1067 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1068 drawable, cmap)) { 1069 xmesa_free_buffer(b); 1070 return NULL; 1071 } 1072 1073 return b; 1074} 1075 1076 1077 1078/* 1079 * Deallocate an XMesaBuffer structure and all related info. 1080 */ 1081PUBLIC void 1082XMesaDestroyBuffer(XMesaBuffer b) 1083{ 1084 xmesa_free_buffer(b); 1085} 1086 1087 1088/** 1089 * Notify the binding context to validate the buffer. 1090 */ 1091void 1092xmesa_notify_invalid_buffer(XMesaBuffer b) 1093{ 1094 XMesaContext xmctx = XMesaGetCurrentContext(); 1095 1096 if (xmctx && xmctx->xm_buffer == b) 1097 xmctx->st->notify_invalid_framebuffer(xmctx->st, b->stfb); 1098} 1099 1100 1101/** 1102 * Query the current drawable size and notify the binding context. 1103 */ 1104void 1105xmesa_check_buffer_size(XMesaBuffer b) 1106{ 1107 if (b->type == PBUFFER) 1108 return; 1109 1110 xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height); 1111 xmesa_notify_invalid_buffer(b); 1112} 1113 1114 1115/* 1116 * Bind buffer b to context c and make c the current rendering context. 1117 */ 1118PUBLIC 1119GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1120 XMesaBuffer readBuffer ) 1121{ 1122 XMesaContext old_ctx = XMesaGetCurrentContext(); 1123 1124 if (old_ctx && old_ctx != c) { 1125 XMesaFlush(old_ctx); 1126 old_ctx->xm_buffer = NULL; 1127 old_ctx->xm_read_buffer = NULL; 1128 } 1129 1130 if (c) { 1131 if (!drawBuffer || !readBuffer) 1132 return GL_FALSE; /* must specify buffers! */ 1133 1134 if (c == old_ctx && 1135 c->xm_buffer == drawBuffer && 1136 c->xm_read_buffer == readBuffer) 1137 return GL_TRUE; 1138 1139 xmesa_check_buffer_size(drawBuffer); 1140 if (readBuffer != drawBuffer) 1141 xmesa_check_buffer_size(readBuffer); 1142 1143 c->xm_buffer = drawBuffer; 1144 c->xm_read_buffer = readBuffer; 1145 1146 stapi->make_current(stapi, c->st, drawBuffer->stfb, readBuffer->stfb); 1147 1148 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1149 drawBuffer->wasCurrent = GL_TRUE; 1150 } 1151 else { 1152 /* Detach */ 1153 stapi->make_current(stapi, NULL, NULL, NULL); 1154 1155 } 1156 return GL_TRUE; 1157} 1158 1159 1160/* 1161 * Unbind the context c from its buffer. 1162 */ 1163GLboolean XMesaUnbindContext( XMesaContext c ) 1164{ 1165 /* A no-op for XFree86 integration purposes */ 1166 return GL_TRUE; 1167} 1168 1169 1170XMesaContext XMesaGetCurrentContext( void ) 1171{ 1172 struct st_context_iface *st = stapi->get_current(stapi); 1173 return (XMesaContext) (st) ? st->st_manager_private : NULL; 1174} 1175 1176 1177 1178/** 1179 * Swap front and back color buffers and have winsys display front buffer. 1180 * If there's no front color buffer no swap actually occurs. 1181 */ 1182PUBLIC 1183void XMesaSwapBuffers( XMesaBuffer b ) 1184{ 1185 XMesaContext xmctx = XMesaGetCurrentContext(); 1186 1187 if (xmctx && xmctx->xm_buffer == b) { 1188 xmctx->st->flush( xmctx->st, 1189 PIPE_FLUSH_RENDER_CACHE | 1190 PIPE_FLUSH_SWAPBUFFERS | 1191 PIPE_FLUSH_FRAME, 1192 NULL); 1193 } 1194 1195 xmesa_swap_st_framebuffer(b->stfb); 1196} 1197 1198 1199 1200/* 1201 * Copy sub-region of back buffer to front buffer 1202 */ 1203void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1204{ 1205 xmesa_copy_st_framebuffer(b->stfb, 1206 ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT, 1207 x, y, width, height); 1208} 1209 1210 1211 1212void XMesaFlush( XMesaContext c ) 1213{ 1214 if (c && c->xm_visual->display) { 1215 XMesaDisplay xmdpy = xmesa_init_display(c->xm_visual->display); 1216 struct pipe_fence_handle *fence = NULL; 1217 1218 c->st->flush(c->st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence); 1219 if (fence) { 1220 xmdpy->screen->fence_finish(xmdpy->screen, fence, 0); 1221 xmdpy->screen->fence_reference(xmdpy->screen, &fence, NULL); 1222 } 1223 XFlush( c->xm_visual->display ); 1224 } 1225} 1226 1227 1228 1229 1230 1231XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d ) 1232{ 1233 XMesaBuffer b; 1234 for (b = XMesaBufferList; b; b = b->Next) { 1235 if (b->ws.drawable == d && b->xm_visual->display == dpy) { 1236 return b; 1237 } 1238 } 1239 return NULL; 1240} 1241 1242 1243/** 1244 * Free/destroy all XMesaBuffers associated with given display. 1245 */ 1246void xmesa_destroy_buffers_on_display(Display *dpy) 1247{ 1248 XMesaBuffer b, next; 1249 for (b = XMesaBufferList; b; b = next) { 1250 next = b->Next; 1251 if (b->xm_visual->display == dpy) { 1252 xmesa_free_buffer(b); 1253 /* delete head of list? */ 1254 if (XMesaBufferList == b) { 1255 XMesaBufferList = next; 1256 } 1257 } 1258 } 1259} 1260 1261 1262/* 1263 * Look for XMesaBuffers whose X window has been destroyed. 1264 * Deallocate any such XMesaBuffers. 1265 */ 1266void XMesaGarbageCollect( void ) 1267{ 1268 XMesaBuffer b, next; 1269 for (b=XMesaBufferList; b; b=next) { 1270 next = b->Next; 1271 if (b->xm_visual && 1272 b->xm_visual->display && 1273 b->ws.drawable && 1274 b->type == WINDOW) { 1275 XSync(b->xm_visual->display, False); 1276 if (!window_exists( b->xm_visual->display, b->ws.drawable )) { 1277 /* found a dead window, free the ancillary info */ 1278 XMesaDestroyBuffer( b ); 1279 } 1280 } 1281 } 1282} 1283 1284 1285 1286 1287PUBLIC void 1288XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer, 1289 const int *attrib_list) 1290{ 1291} 1292 1293 1294 1295PUBLIC void 1296XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer) 1297{ 1298} 1299 1300 1301void 1302XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask) 1303{ 1304 if (dst->st->copy) 1305 dst->st->copy(dst->st, src->st, mask); 1306} 1307