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_context.h" 60 #include "pipe/p_defines.h" 61 #include "pipe/p_screen.h" 62 #include "pipe/p_state.h" 63 64 #include "util/u_atomic.h" 65 #include "util/u_inlines.h" 66 67 #include "xm_public.h" 68 #include <GL/glx.h> 69 70 71 /* Driver interface routines, set up by xlib backend on library 72 * _init(). These are global in the same way that function names are 73 * global. 74 */ 75 static struct xm_driver driver; 76 static struct st_api *stapi; 77 78 /* Default strict invalidate to false. This means we will not call 79 * XGetGeometry after every swapbuffers, which allows swapbuffers to 80 * remain asynchronous. For apps running at 100fps with synchronous 81 * swapping, a 10% boost is typical. For gears, I see closer to 20% 82 * speedup. 83 * 84 * Note that the work of copying data on swapbuffers doesn't disappear 85 * - this change just allows the X server to execute the PutImage 86 * asynchronously without us effectively blocked until its completion. 87 * 88 * This speeds up even llvmpipe's threaded rasterization as the 89 * swapbuffers operation was a large part of the serial component of 90 * an llvmpipe frame. 91 * 92 * The downside of this is correctness - applications which don't call 93 * glViewport on window resizes will get incorrect rendering. A 94 * better solution would be to have per-frame but asynchronous 95 * invalidation. Xcb almost looks as if it could provide this, but 96 * the API doesn't seem to quite be there. 97 */ 98 boolean xmesa_strict_invalidate = FALSE; 99 100 void xmesa_set_driver( const struct xm_driver *templ ) 101 { 102 driver = *templ; 103 stapi = driver.create_st_api(); 104 105 xmesa_strict_invalidate = 106 debug_get_bool_option("XMESA_STRICT_INVALIDATE", FALSE); 107 } 108 109 110 /* 111 * XXX replace this with a linked list, or better yet, try to attach the 112 * gallium/mesa extra bits to the X Display object with XAddExtension(). 113 */ 114 #define MAX_DISPLAYS 10 115 static struct xmesa_display Displays[MAX_DISPLAYS]; 116 static int NumDisplays = 0; 117 118 static int 119 xmesa_get_param(struct st_manager *smapi, 120 enum st_manager_param param) 121 { 122 switch(param) { 123 case ST_MANAGER_BROKEN_INVALIDATE: 124 return !xmesa_strict_invalidate; 125 default: 126 return 0; 127 } 128 } 129 130 static XMesaDisplay 131 xmesa_init_display( Display *display ) 132 { 133 pipe_static_mutex(init_mutex); 134 XMesaDisplay xmdpy; 135 int i; 136 137 pipe_mutex_lock(init_mutex); 138 139 /* Look for XMesaDisplay which corresponds to 'display' */ 140 for (i = 0; i < NumDisplays; i++) { 141 if (Displays[i].display == display) { 142 /* Found it */ 143 pipe_mutex_unlock(init_mutex); 144 return &Displays[i]; 145 } 146 } 147 148 /* Create new XMesaDisplay */ 149 150 assert(NumDisplays < MAX_DISPLAYS); 151 xmdpy = &Displays[NumDisplays]; 152 NumDisplays++; 153 154 if (!xmdpy->display && display) { 155 xmdpy->display = display; 156 xmdpy->screen = driver.create_pipe_screen(display); 157 xmdpy->smapi = CALLOC_STRUCT(st_manager); 158 if (xmdpy->smapi) { 159 xmdpy->smapi->screen = xmdpy->screen; 160 xmdpy->smapi->get_param = xmesa_get_param; 161 } 162 163 if (xmdpy->screen && xmdpy->smapi) { 164 pipe_mutex_init(xmdpy->mutex); 165 } 166 else { 167 if (xmdpy->screen) { 168 xmdpy->screen->destroy(xmdpy->screen); 169 xmdpy->screen = NULL; 170 } 171 if (xmdpy->smapi) { 172 FREE(xmdpy->smapi); 173 xmdpy->smapi = NULL; 174 } 175 176 xmdpy->display = NULL; 177 } 178 } 179 if (!xmdpy->display || xmdpy->display != display) 180 xmdpy = NULL; 181 182 pipe_mutex_unlock(init_mutex); 183 184 return xmdpy; 185 } 186 187 /**********************************************************************/ 188 /***** X Utility Functions *****/ 189 /**********************************************************************/ 190 191 192 /** 193 * Return the host's byte order as LSBFirst or MSBFirst ala X. 194 */ 195 static int host_byte_order( void ) 196 { 197 int i = 1; 198 char *cptr = (char *) &i; 199 return (*cptr==1) ? LSBFirst : MSBFirst; 200 } 201 202 203 204 205 /** 206 * Return the true number of bits per pixel for XImages. 207 * For example, if we request a 24-bit deep visual we may actually need/get 208 * 32bpp XImages. This function returns the appropriate bpp. 209 * Input: dpy - the X display 210 * visinfo - desribes the visual to be used for XImages 211 * Return: true number of bits per pixel for XImages 212 */ 213 static int 214 bits_per_pixel( XMesaVisual xmv ) 215 { 216 Display *dpy = xmv->display; 217 XVisualInfo * visinfo = xmv->visinfo; 218 XImage *img; 219 int bitsPerPixel; 220 /* Create a temporary XImage */ 221 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 222 ZPixmap, 0, /*format, offset*/ 223 (char*) MALLOC(8), /*data*/ 224 1, 1, /*width, height*/ 225 32, /*bitmap_pad*/ 226 0 /*bytes_per_line*/ 227 ); 228 assert(img); 229 /* grab the bits/pixel value */ 230 bitsPerPixel = img->bits_per_pixel; 231 /* free the XImage */ 232 free( img->data ); 233 img->data = NULL; 234 XDestroyImage( img ); 235 return bitsPerPixel; 236 } 237 238 239 240 /* 241 * Determine if a given X window ID is valid (window exists). 242 * Do this by calling XGetWindowAttributes() for the window and 243 * checking if we catch an X error. 244 * Input: dpy - the display 245 * win - the window to check for existance 246 * Return: GL_TRUE - window exists 247 * GL_FALSE - window doesn't exist 248 */ 249 static GLboolean WindowExistsFlag; 250 251 static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr ) 252 { 253 (void) dpy; 254 if (xerr->error_code == BadWindow) { 255 WindowExistsFlag = GL_FALSE; 256 } 257 return 0; 258 } 259 260 static GLboolean window_exists( Display *dpy, Window win ) 261 { 262 XWindowAttributes wa; 263 int (*old_handler)( Display*, XErrorEvent* ); 264 WindowExistsFlag = GL_TRUE; 265 old_handler = XSetErrorHandler(window_exists_err_handler); 266 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 267 XSetErrorHandler(old_handler); 268 return WindowExistsFlag; 269 } 270 271 static Status 272 get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height ) 273 { 274 Window root; 275 Status stat; 276 int xpos, ypos; 277 unsigned int w, h, bw, depth; 278 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 279 *width = w; 280 *height = h; 281 return stat; 282 } 283 284 285 /** 286 * Return the size of the window (or pixmap) that corresponds to the 287 * given XMesaBuffer. 288 * \param width returns width in pixels 289 * \param height returns height in pixels 290 */ 291 void 292 xmesa_get_window_size(Display *dpy, XMesaBuffer b, 293 GLuint *width, GLuint *height) 294 { 295 XMesaDisplay xmdpy = xmesa_init_display(dpy); 296 Status stat; 297 298 pipe_mutex_lock(xmdpy->mutex); 299 stat = get_drawable_size(dpy, b->ws.drawable, width, height); 300 pipe_mutex_unlock(xmdpy->mutex); 301 302 if (!stat) { 303 /* probably querying a window that's recently been destroyed */ 304 _mesa_warning(NULL, "XGetGeometry failed!\n"); 305 *width = *height = 1; 306 } 307 } 308 309 #define GET_REDMASK(__v) __v->mesa_visual.redMask 310 #define GET_GREENMASK(__v) __v->mesa_visual.greenMask 311 #define GET_BLUEMASK(__v) __v->mesa_visual.blueMask 312 313 314 /** 315 * Choose the pixel format for the given visual. 316 * This will tell the gallium driver how to pack pixel data into 317 * drawing surfaces. 318 */ 319 static GLuint 320 choose_pixel_format(XMesaVisual v) 321 { 322 boolean native_byte_order = (host_byte_order() == 323 ImageByteOrder(v->display)); 324 325 if ( GET_REDMASK(v) == 0x0000ff 326 && GET_GREENMASK(v) == 0x00ff00 327 && GET_BLUEMASK(v) == 0xff0000 328 && v->BitsPerPixel == 32) { 329 if (native_byte_order) { 330 /* no byteswapping needed */ 331 return PIPE_FORMAT_R8G8B8A8_UNORM; 332 } 333 else { 334 return PIPE_FORMAT_A8B8G8R8_UNORM; 335 } 336 } 337 else if ( GET_REDMASK(v) == 0xff0000 338 && GET_GREENMASK(v) == 0x00ff00 339 && GET_BLUEMASK(v) == 0x0000ff 340 && v->BitsPerPixel == 32) { 341 if (native_byte_order) { 342 /* no byteswapping needed */ 343 return PIPE_FORMAT_B8G8R8A8_UNORM; 344 } 345 else { 346 return PIPE_FORMAT_A8R8G8B8_UNORM; 347 } 348 } 349 else if ( GET_REDMASK(v) == 0x0000ff00 350 && GET_GREENMASK(v) == 0x00ff0000 351 && GET_BLUEMASK(v) == 0xff000000 352 && v->BitsPerPixel == 32) { 353 if (native_byte_order) { 354 /* no byteswapping needed */ 355 return PIPE_FORMAT_A8R8G8B8_UNORM; 356 } 357 else { 358 return PIPE_FORMAT_B8G8R8A8_UNORM; 359 } 360 } 361 else if ( GET_REDMASK(v) == 0xf800 362 && GET_GREENMASK(v) == 0x07e0 363 && GET_BLUEMASK(v) == 0x001f 364 && native_byte_order 365 && v->BitsPerPixel == 16) { 366 /* 5-6-5 RGB */ 367 return PIPE_FORMAT_B5G6R5_UNORM; 368 } 369 370 return PIPE_FORMAT_NONE; 371 } 372 373 374 /** 375 * Choose a depth/stencil format that satisfies the given depth and 376 * stencil sizes. 377 */ 378 static enum pipe_format 379 choose_depth_stencil_format(XMesaDisplay xmdpy, int depth, int stencil) 380 { 381 const enum pipe_texture_target target = PIPE_TEXTURE_2D; 382 const unsigned tex_usage = PIPE_BIND_DEPTH_STENCIL; 383 const unsigned sample_count = 0; 384 enum pipe_format formats[8], fmt; 385 int count, i; 386 387 count = 0; 388 389 if (depth <= 16 && stencil == 0) { 390 formats[count++] = PIPE_FORMAT_Z16_UNORM; 391 } 392 if (depth <= 24 && stencil == 0) { 393 formats[count++] = PIPE_FORMAT_X8Z24_UNORM; 394 formats[count++] = PIPE_FORMAT_Z24X8_UNORM; 395 } 396 if (depth <= 24 && stencil <= 8) { 397 formats[count++] = PIPE_FORMAT_S8_UINT_Z24_UNORM; 398 formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_UINT; 399 } 400 if (depth <= 32 && stencil == 0) { 401 formats[count++] = PIPE_FORMAT_Z32_UNORM; 402 } 403 404 fmt = PIPE_FORMAT_NONE; 405 for (i = 0; i < count; i++) { 406 if (xmdpy->screen->is_format_supported(xmdpy->screen, formats[i], 407 target, sample_count, 408 tex_usage)) { 409 fmt = formats[i]; 410 break; 411 } 412 } 413 414 return fmt; 415 } 416 417 418 419 /**********************************************************************/ 420 /***** Linked list of XMesaBuffers *****/ 421 /**********************************************************************/ 422 423 static XMesaBuffer XMesaBufferList = NULL; 424 425 426 /** 427 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 428 * Note that XMesaBuffer is derived from struct gl_framebuffer. 429 * The new XMesaBuffer will not have any size (Width=Height=0). 430 * 431 * \param d the corresponding X drawable (window or pixmap) 432 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 433 * \param vis the buffer's visual 434 * \param cmap the window's colormap, if known. 435 * \return new XMesaBuffer or NULL if any problem 436 */ 437 static XMesaBuffer 438 create_xmesa_buffer(Drawable d, BufferType type, 439 XMesaVisual vis, Colormap cmap) 440 { 441 XMesaDisplay xmdpy = xmesa_init_display(vis->display); 442 XMesaBuffer b; 443 uint width, height; 444 445 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 446 447 if (!xmdpy) 448 return NULL; 449 450 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 451 if (!b) 452 return NULL; 453 454 b->ws.drawable = d; 455 b->ws.visual = vis->visinfo->visual; 456 b->ws.depth = vis->visinfo->depth; 457 458 b->xm_visual = vis; 459 b->type = type; 460 b->cmap = cmap; 461 462 get_drawable_size(vis->display, d, &width, &height); 463 464 /* 465 * Create framebuffer, but we'll plug in our own renderbuffers below. 466 */ 467 b->stfb = xmesa_create_st_framebuffer(xmdpy, b); 468 469 /* GLX_EXT_texture_from_pixmap */ 470 b->TextureTarget = 0; 471 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 472 b->TextureMipmap = 0; 473 474 /* insert buffer into linked list */ 475 b->Next = XMesaBufferList; 476 XMesaBufferList = b; 477 478 return b; 479 } 480 481 482 /** 483 * Find an XMesaBuffer by matching X display and colormap but NOT matching 484 * the notThis buffer. 485 */ 486 XMesaBuffer 487 xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis) 488 { 489 XMesaBuffer b; 490 for (b = XMesaBufferList; b; b = b->Next) { 491 if (b->xm_visual->display == dpy && 492 b->cmap == cmap && 493 b != notThis) { 494 return b; 495 } 496 } 497 return NULL; 498 } 499 500 501 /** 502 * Remove buffer from linked list, delete if no longer referenced. 503 */ 504 static void 505 xmesa_free_buffer(XMesaBuffer buffer) 506 { 507 XMesaBuffer prev = NULL, b; 508 509 for (b = XMesaBufferList; b; b = b->Next) { 510 if (b == buffer) { 511 /* unlink buffer from list */ 512 if (prev) 513 prev->Next = buffer->Next; 514 else 515 XMesaBufferList = buffer->Next; 516 517 /* Since the X window for the XMesaBuffer is going away, we don't 518 * want to dereference this pointer in the future. 519 */ 520 b->ws.drawable = 0; 521 522 /* XXX we should move the buffer to a delete-pending list and destroy 523 * the buffer until it is no longer current. 524 */ 525 xmesa_destroy_st_framebuffer(buffer->stfb); 526 527 free(buffer); 528 529 return; 530 } 531 /* continue search */ 532 prev = b; 533 } 534 /* buffer not found in XMesaBufferList */ 535 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 536 } 537 538 539 540 /**********************************************************************/ 541 /***** Misc Private Functions *****/ 542 /**********************************************************************/ 543 544 545 /** 546 * When a context is bound for the first time, we can finally finish 547 * initializing the context's visual and buffer information. 548 * \param v the XMesaVisual to initialize 549 * \param b the XMesaBuffer to initialize (may be NULL) 550 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 551 * \param window the window/pixmap we're rendering into 552 * \param cmap the colormap associated with the window/pixmap 553 * \return GL_TRUE=success, GL_FALSE=failure 554 */ 555 static GLboolean 556 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 557 GLboolean rgb_flag, Drawable window, 558 Colormap cmap) 559 { 560 ASSERT(!b || b->xm_visual == v); 561 562 /* Save true bits/pixel */ 563 v->BitsPerPixel = bits_per_pixel(v); 564 assert(v->BitsPerPixel > 0); 565 566 if (rgb_flag == GL_FALSE) { 567 /* COLOR-INDEXED WINDOW: not supported*/ 568 return GL_FALSE; 569 } 570 else { 571 /* RGB WINDOW: 572 * We support RGB rendering into almost any kind of visual. 573 */ 574 const int xclass = v->visualType; 575 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) { 576 _mesa_warning(NULL, 577 "XMesa: RGB mode rendering not supported in given visual.\n"); 578 return GL_FALSE; 579 } 580 v->mesa_visual.indexBits = 0; 581 582 if (v->BitsPerPixel == 32) { 583 /* We use XImages for all front/back buffers. If an X Window or 584 * X Pixmap is 32bpp, there's no guarantee that the alpha channel 585 * will be preserved. For XImages we're in luck. 586 */ 587 v->mesa_visual.alphaBits = 8; 588 } 589 } 590 591 /* 592 * If MESA_INFO env var is set print out some debugging info 593 * which can help Brian figure out what's going on when a user 594 * reports bugs. 595 */ 596 if (_mesa_getenv("MESA_INFO")) { 597 printf("X/Mesa visual = %p\n", (void *) v); 598 printf("X/Mesa level = %d\n", v->mesa_visual.level); 599 printf("X/Mesa depth = %d\n", v->visinfo->depth); 600 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 601 } 602 603 return GL_TRUE; 604 } 605 606 607 608 #define NUM_VISUAL_TYPES 6 609 610 /** 611 * Convert an X visual type to a GLX visual type. 612 * 613 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 614 * to be converted. 615 * \return If \c visualType is a valid X visual type, a GLX visual type will 616 * be returned. Otherwise \c GLX_NONE will be returned. 617 * 618 * \note 619 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 620 * DRI CVS tree. 621 */ 622 static GLint 623 xmesa_convert_from_x_visual_type( int visualType ) 624 { 625 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 626 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 627 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 628 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 629 }; 630 631 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 632 ? glx_visual_types[ visualType ] : GLX_NONE; 633 } 634 635 636 /**********************************************************************/ 637 /***** Public Functions *****/ 638 /**********************************************************************/ 639 640 641 /* 642 * Create a new X/Mesa visual. 643 * Input: display - X11 display 644 * visinfo - an XVisualInfo pointer 645 * rgb_flag - GL_TRUE = RGB mode, 646 * GL_FALSE = color index mode 647 * alpha_flag - alpha buffer requested? 648 * db_flag - GL_TRUE = double-buffered, 649 * GL_FALSE = single buffered 650 * stereo_flag - stereo visual? 651 * ximage_flag - GL_TRUE = use an XImage for back buffer, 652 * GL_FALSE = use an off-screen pixmap for back buffer 653 * depth_size - requested bits/depth values, or zero 654 * stencil_size - requested bits/stencil values, or zero 655 * accum_red_size - requested bits/red accum values, or zero 656 * accum_green_size - requested bits/green accum values, or zero 657 * accum_blue_size - requested bits/blue accum values, or zero 658 * accum_alpha_size - requested bits/alpha accum values, or zero 659 * num_samples - number of samples/pixel if multisampling, or zero 660 * level - visual level, usually 0 661 * visualCaveat - ala the GLX extension, usually GLX_NONE 662 * Return; a new XMesaVisual or 0 if error. 663 */ 664 PUBLIC 665 XMesaVisual XMesaCreateVisual( Display *display, 666 XVisualInfo * visinfo, 667 GLboolean rgb_flag, 668 GLboolean alpha_flag, 669 GLboolean db_flag, 670 GLboolean stereo_flag, 671 GLboolean ximage_flag, 672 GLint depth_size, 673 GLint stencil_size, 674 GLint accum_red_size, 675 GLint accum_green_size, 676 GLint accum_blue_size, 677 GLint accum_alpha_size, 678 GLint num_samples, 679 GLint level, 680 GLint visualCaveat ) 681 { 682 XMesaDisplay xmdpy = xmesa_init_display(display); 683 XMesaVisual v; 684 GLint red_bits, green_bits, blue_bits, alpha_bits; 685 686 if (!xmdpy) 687 return NULL; 688 689 /* For debugging only */ 690 if (_mesa_getenv("MESA_XSYNC")) { 691 /* This makes debugging X easier. 692 * In your debugger, set a breakpoint on _XError to stop when an 693 * X protocol error is generated. 694 */ 695 XSynchronize( display, 1 ); 696 } 697 698 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 699 if (!v) { 700 return NULL; 701 } 702 703 v->display = display; 704 705 /* Save a copy of the XVisualInfo struct because the user may Xfree() 706 * the struct but we may need some of the information contained in it 707 * at a later time. 708 */ 709 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 710 if (!v->visinfo) { 711 free(v); 712 return NULL; 713 } 714 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 715 716 v->ximage_flag = ximage_flag; 717 718 v->mesa_visual.redMask = visinfo->red_mask; 719 v->mesa_visual.greenMask = visinfo->green_mask; 720 v->mesa_visual.blueMask = visinfo->blue_mask; 721 v->visualID = visinfo->visualid; 722 v->screen = visinfo->screen; 723 724 #if !(defined(__cplusplus) || defined(c_plusplus)) 725 v->visualType = xmesa_convert_from_x_visual_type(visinfo->class); 726 #else 727 v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 728 #endif 729 730 v->mesa_visual.visualRating = visualCaveat; 731 732 if (alpha_flag) 733 v->mesa_visual.alphaBits = 8; 734 735 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 736 737 { 738 const int xclass = v->visualType; 739 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 740 red_bits = _mesa_bitcount(GET_REDMASK(v)); 741 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 742 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 743 } 744 else { 745 /* this is an approximation */ 746 int depth; 747 depth = v->visinfo->depth; 748 red_bits = depth / 3; 749 depth -= red_bits; 750 green_bits = depth / 2; 751 depth -= green_bits; 752 blue_bits = depth; 753 alpha_bits = 0; 754 assert( red_bits + green_bits + blue_bits == v->visinfo->depth ); 755 } 756 alpha_bits = v->mesa_visual.alphaBits; 757 } 758 759 /* initialize visual */ 760 { 761 struct gl_config *vis = &v->mesa_visual; 762 763 vis->rgbMode = GL_TRUE; 764 vis->doubleBufferMode = db_flag; 765 vis->stereoMode = stereo_flag; 766 767 vis->redBits = red_bits; 768 vis->greenBits = green_bits; 769 vis->blueBits = blue_bits; 770 vis->alphaBits = alpha_bits; 771 vis->rgbBits = red_bits + green_bits + blue_bits; 772 773 vis->indexBits = 0; 774 vis->depthBits = depth_size; 775 vis->stencilBits = stencil_size; 776 777 vis->accumRedBits = accum_red_size; 778 vis->accumGreenBits = accum_green_size; 779 vis->accumBlueBits = accum_blue_size; 780 vis->accumAlphaBits = accum_alpha_size; 781 782 vis->haveAccumBuffer = accum_red_size > 0; 783 vis->haveDepthBuffer = depth_size > 0; 784 vis->haveStencilBuffer = stencil_size > 0; 785 786 vis->numAuxBuffers = 0; 787 vis->level = 0; 788 vis->sampleBuffers = 0; 789 vis->samples = 0; 790 } 791 792 v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK; 793 if (db_flag) 794 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK; 795 if (stereo_flag) { 796 v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK; 797 if (db_flag) 798 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK; 799 } 800 801 v->stvis.color_format = choose_pixel_format(v); 802 if (v->stvis.color_format == PIPE_FORMAT_NONE) { 803 FREE(v->visinfo); 804 FREE(v); 805 return NULL; 806 } 807 808 v->stvis.depth_stencil_format = 809 choose_depth_stencil_format(xmdpy, depth_size, stencil_size); 810 811 v->stvis.accum_format = (accum_red_size + 812 accum_green_size + accum_blue_size + accum_alpha_size) ? 813 PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE; 814 815 v->stvis.samples = num_samples; 816 v->stvis.render_buffer = ST_ATTACHMENT_INVALID; 817 818 /* XXX minor hack */ 819 v->mesa_visual.level = level; 820 return v; 821 } 822 823 824 PUBLIC 825 void XMesaDestroyVisual( XMesaVisual v ) 826 { 827 free(v->visinfo); 828 free(v); 829 } 830 831 832 /** 833 * Return the informative name. 834 */ 835 const char * 836 xmesa_get_name(void) 837 { 838 return stapi->name; 839 } 840 841 842 /** 843 * Do per-display initializations. 844 */ 845 void 846 xmesa_init( Display *display ) 847 { 848 xmesa_init_display(display); 849 } 850 851 852 /** 853 * Create a new XMesaContext. 854 * \param v the XMesaVisual 855 * \param share_list another XMesaContext with which to share display 856 * lists or NULL if no sharing is wanted. 857 * \return an XMesaContext or NULL if error. 858 */ 859 PUBLIC 860 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list, 861 GLuint major, GLuint minor, 862 GLuint profileMask, GLuint contextFlags) 863 { 864 XMesaDisplay xmdpy = xmesa_init_display(v->display); 865 struct st_context_attribs attribs; 866 enum st_context_error ctx_err = 0; 867 XMesaContext c; 868 869 if (!xmdpy) 870 return NULL; 871 872 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */ 873 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 874 if (!c) 875 return NULL; 876 877 c->xm_visual = v; 878 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 879 c->xm_read_buffer = NULL; 880 881 memset(&attribs, 0, sizeof(attribs)); 882 attribs.visual = v->stvis; 883 attribs.major = major; 884 attribs.minor = minor; 885 if (contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB) 886 attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE; 887 if (contextFlags & GLX_CONTEXT_DEBUG_BIT_ARB) 888 attribs.flags |= ST_CONTEXT_FLAG_DEBUG; 889 if (contextFlags & GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB) 890 attribs.flags |= ST_CONTEXT_FLAG_ROBUST_ACCESS; 891 892 /* There are no profiles before OpenGL 3.2. The 893 * GLX_ARB_create_context_profile spec says: 894 * 895 * "If the requested OpenGL version is less than 3.2, 896 * GLX_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality of the 897 * context is determined solely by the requested version." 898 * 899 * The spec also says: 900 * 901 * "The default value for GLX_CONTEXT_PROFILE_MASK_ARB is 902 * GLX_CONTEXT_CORE_PROFILE_BIT_ARB." 903 */ 904 attribs.profile = ST_PROFILE_DEFAULT; 905 if ((major > 3 || (major == 3 && minor >= 2)) 906 && ((profileMask & GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) == 0)) 907 attribs.profile = ST_PROFILE_OPENGL_CORE; 908 909 c->st = stapi->create_context(stapi, xmdpy->smapi, &attribs, 910 &ctx_err, (share_list) ? share_list->st : NULL); 911 if (c->st == NULL) 912 goto fail; 913 914 c->st->st_manager_private = (void *) c; 915 916 return c; 917 918 fail: 919 if (c->st) 920 c->st->destroy(c->st); 921 922 free(c); 923 return NULL; 924 } 925 926 927 928 PUBLIC 929 void XMesaDestroyContext( XMesaContext c ) 930 { 931 c->st->destroy(c->st); 932 933 /* FIXME: We should destroy the screen here, but if we do so, surfaces may 934 * outlive it, causing segfaults 935 struct pipe_screen *screen = c->st->pipe->screen; 936 screen->destroy(screen); 937 */ 938 939 free(c); 940 } 941 942 943 944 /** 945 * Private function for creating an XMesaBuffer which corresponds to an 946 * X window or pixmap. 947 * \param v the window's XMesaVisual 948 * \param w the window we're wrapping 949 * \return new XMesaBuffer or NULL if error 950 */ 951 PUBLIC XMesaBuffer 952 XMesaCreateWindowBuffer(XMesaVisual v, Window w) 953 { 954 XWindowAttributes attr; 955 XMesaBuffer b; 956 Colormap cmap; 957 int depth; 958 959 assert(v); 960 assert(w); 961 962 /* Check that window depth matches visual depth */ 963 XGetWindowAttributes( v->display, w, &attr ); 964 depth = attr.depth; 965 if (v->visinfo->depth != depth) { 966 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 967 v->visinfo->depth, depth); 968 return NULL; 969 } 970 971 /* Find colormap */ 972 if (attr.colormap) { 973 cmap = attr.colormap; 974 } 975 else { 976 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 977 /* this is weird, a window w/out a colormap!? */ 978 /* OK, let's just allocate a new one and hope for the best */ 979 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 980 } 981 982 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap); 983 if (!b) 984 return NULL; 985 986 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 987 (Drawable) w, cmap )) { 988 xmesa_free_buffer(b); 989 return NULL; 990 } 991 992 return b; 993 } 994 995 996 997 /** 998 * Create a new XMesaBuffer from an X pixmap. 999 * 1000 * \param v the XMesaVisual 1001 * \param p the pixmap 1002 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1003 * \c GLX_DIRECT_COLOR visual for the pixmap 1004 * \returns new XMesaBuffer or NULL if error 1005 */ 1006 PUBLIC XMesaBuffer 1007 XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap) 1008 { 1009 XMesaBuffer b; 1010 1011 assert(v); 1012 1013 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 1014 if (!b) 1015 return NULL; 1016 1017 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1018 (Drawable) p, cmap)) { 1019 xmesa_free_buffer(b); 1020 return NULL; 1021 } 1022 1023 return b; 1024 } 1025 1026 1027 /** 1028 * For GLX_EXT_texture_from_pixmap 1029 */ 1030 XMesaBuffer 1031 XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p, 1032 Colormap cmap, 1033 int format, int target, int mipmap) 1034 { 1035 GET_CURRENT_CONTEXT(ctx); 1036 XMesaBuffer b; 1037 1038 assert(v); 1039 1040 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 1041 if (!b) 1042 return NULL; 1043 1044 /* get pixmap size */ 1045 xmesa_get_window_size(v->display, b, &b->width, &b->height); 1046 1047 if (target == 0) { 1048 /* examine dims */ 1049 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1050 target = GLX_TEXTURE_2D_EXT; 1051 } 1052 else if ( _mesa_bitcount(b->width) == 1 1053 && _mesa_bitcount(b->height) == 1) { 1054 /* power of two size */ 1055 if (b->height == 1) { 1056 target = GLX_TEXTURE_1D_EXT; 1057 } 1058 else { 1059 target = GLX_TEXTURE_2D_EXT; 1060 } 1061 } 1062 else if (ctx->Extensions.NV_texture_rectangle) { 1063 target = GLX_TEXTURE_RECTANGLE_EXT; 1064 } 1065 else { 1066 /* non power of two textures not supported */ 1067 XMesaDestroyBuffer(b); 1068 return 0; 1069 } 1070 } 1071 1072 b->TextureTarget = target; 1073 b->TextureFormat = format; 1074 b->TextureMipmap = mipmap; 1075 1076 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1077 (Drawable) p, cmap)) { 1078 xmesa_free_buffer(b); 1079 return NULL; 1080 } 1081 1082 return b; 1083 } 1084 1085 1086 1087 XMesaBuffer 1088 XMesaCreatePBuffer(XMesaVisual v, Colormap cmap, 1089 unsigned int width, unsigned int height) 1090 { 1091 Window root; 1092 Drawable drawable; /* X Pixmap Drawable */ 1093 XMesaBuffer b; 1094 1095 /* allocate pixmap for front buffer */ 1096 root = RootWindow( v->display, v->visinfo->screen ); 1097 drawable = XCreatePixmap(v->display, root, width, height, 1098 v->visinfo->depth); 1099 if (!drawable) 1100 return NULL; 1101 1102 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1103 if (!b) 1104 return NULL; 1105 1106 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1107 drawable, cmap)) { 1108 xmesa_free_buffer(b); 1109 return NULL; 1110 } 1111 1112 return b; 1113 } 1114 1115 1116 1117 /* 1118 * Deallocate an XMesaBuffer structure and all related info. 1119 */ 1120 PUBLIC void 1121 XMesaDestroyBuffer(XMesaBuffer b) 1122 { 1123 xmesa_free_buffer(b); 1124 } 1125 1126 1127 /** 1128 * Notify the binding context to validate the buffer. 1129 */ 1130 void 1131 xmesa_notify_invalid_buffer(XMesaBuffer b) 1132 { 1133 p_atomic_inc(&b->stfb->stamp); 1134 } 1135 1136 1137 /** 1138 * Query the current drawable size and notify the binding context. 1139 */ 1140 void 1141 xmesa_check_buffer_size(XMesaBuffer b) 1142 { 1143 GLuint old_width, old_height; 1144 1145 if (b->type == PBUFFER) 1146 return; 1147 1148 old_width = b->width; 1149 old_height = b->height; 1150 1151 xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height); 1152 1153 if (b->width != old_width || b->height != old_height) 1154 xmesa_notify_invalid_buffer(b); 1155 } 1156 1157 1158 /* 1159 * Bind buffer b to context c and make c the current rendering context. 1160 */ 1161 PUBLIC 1162 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1163 XMesaBuffer readBuffer ) 1164 { 1165 XMesaContext old_ctx = XMesaGetCurrentContext(); 1166 1167 if (old_ctx && old_ctx != c) { 1168 XMesaFlush(old_ctx); 1169 old_ctx->xm_buffer = NULL; 1170 old_ctx->xm_read_buffer = NULL; 1171 } 1172 1173 if (c) { 1174 if (!drawBuffer || !readBuffer) 1175 return GL_FALSE; /* must specify buffers! */ 1176 1177 if (c == old_ctx && 1178 c->xm_buffer == drawBuffer && 1179 c->xm_read_buffer == readBuffer) 1180 return GL_TRUE; 1181 1182 xmesa_check_buffer_size(drawBuffer); 1183 if (readBuffer != drawBuffer) 1184 xmesa_check_buffer_size(readBuffer); 1185 1186 c->xm_buffer = drawBuffer; 1187 c->xm_read_buffer = readBuffer; 1188 1189 stapi->make_current(stapi, c->st, drawBuffer->stfb, readBuffer->stfb); 1190 1191 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1192 drawBuffer->wasCurrent = GL_TRUE; 1193 } 1194 else { 1195 /* Detach */ 1196 stapi->make_current(stapi, NULL, NULL, NULL); 1197 1198 } 1199 return GL_TRUE; 1200 } 1201 1202 1203 /* 1204 * Unbind the context c from its buffer. 1205 */ 1206 GLboolean XMesaUnbindContext( XMesaContext c ) 1207 { 1208 /* A no-op for XFree86 integration purposes */ 1209 return GL_TRUE; 1210 } 1211 1212 1213 XMesaContext XMesaGetCurrentContext( void ) 1214 { 1215 struct st_context_iface *st = stapi->get_current(stapi); 1216 return (XMesaContext) (st) ? st->st_manager_private : NULL; 1217 } 1218 1219 1220 1221 /** 1222 * Swap front and back color buffers and have winsys display front buffer. 1223 * If there's no front color buffer no swap actually occurs. 1224 */ 1225 PUBLIC 1226 void XMesaSwapBuffers( XMesaBuffer b ) 1227 { 1228 XMesaContext xmctx = XMesaGetCurrentContext(); 1229 1230 if (xmctx && xmctx->xm_buffer == b) { 1231 xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL); 1232 } 1233 1234 xmesa_swap_st_framebuffer(b->stfb); 1235 } 1236 1237 1238 1239 /* 1240 * Copy sub-region of back buffer to front buffer 1241 */ 1242 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1243 { 1244 xmesa_copy_st_framebuffer(b->stfb, 1245 ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT, 1246 x, y, width, height); 1247 } 1248 1249 1250 1251 void XMesaFlush( XMesaContext c ) 1252 { 1253 if (c && c->xm_visual->display) { 1254 XMesaDisplay xmdpy = xmesa_init_display(c->xm_visual->display); 1255 struct pipe_fence_handle *fence = NULL; 1256 1257 c->st->flush(c->st, ST_FLUSH_FRONT, &fence); 1258 if (fence) { 1259 xmdpy->screen->fence_finish(xmdpy->screen, fence, 1260 PIPE_TIMEOUT_INFINITE); 1261 xmdpy->screen->fence_reference(xmdpy->screen, &fence, NULL); 1262 } 1263 XFlush( c->xm_visual->display ); 1264 } 1265 } 1266 1267 1268 1269 1270 1271 XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d ) 1272 { 1273 XMesaBuffer b; 1274 for (b = XMesaBufferList; b; b = b->Next) { 1275 if (b->ws.drawable == d && b->xm_visual->display == dpy) { 1276 return b; 1277 } 1278 } 1279 return NULL; 1280 } 1281 1282 1283 /** 1284 * Free/destroy all XMesaBuffers associated with given display. 1285 */ 1286 void xmesa_destroy_buffers_on_display(Display *dpy) 1287 { 1288 XMesaBuffer b, next; 1289 for (b = XMesaBufferList; b; b = next) { 1290 next = b->Next; 1291 if (b->xm_visual->display == dpy) { 1292 xmesa_free_buffer(b); 1293 /* delete head of list? */ 1294 if (XMesaBufferList == b) { 1295 XMesaBufferList = next; 1296 } 1297 } 1298 } 1299 } 1300 1301 1302 /* 1303 * Look for XMesaBuffers whose X window has been destroyed. 1304 * Deallocate any such XMesaBuffers. 1305 */ 1306 void XMesaGarbageCollect( void ) 1307 { 1308 XMesaBuffer b, next; 1309 for (b=XMesaBufferList; b; b=next) { 1310 next = b->Next; 1311 if (b->xm_visual && 1312 b->xm_visual->display && 1313 b->ws.drawable && 1314 b->type == WINDOW) { 1315 XSync(b->xm_visual->display, False); 1316 if (!window_exists( b->xm_visual->display, b->ws.drawable )) { 1317 /* found a dead window, free the ancillary info */ 1318 XMesaDestroyBuffer( b ); 1319 } 1320 } 1321 } 1322 } 1323 1324 1325 static enum st_attachment_type xmesa_attachment_type(int glx_attachment) 1326 { 1327 switch(glx_attachment) { 1328 case GLX_FRONT_LEFT_EXT: 1329 return ST_ATTACHMENT_FRONT_LEFT; 1330 case GLX_FRONT_RIGHT_EXT: 1331 return ST_ATTACHMENT_FRONT_RIGHT; 1332 case GLX_BACK_LEFT_EXT: 1333 return ST_ATTACHMENT_BACK_LEFT; 1334 case GLX_BACK_RIGHT_EXT: 1335 return ST_ATTACHMENT_BACK_RIGHT; 1336 default: 1337 assert(0); 1338 return ST_ATTACHMENT_FRONT_LEFT; 1339 } 1340 } 1341 1342 1343 PUBLIC void 1344 XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer, 1345 const int *attrib_list) 1346 { 1347 struct st_context_iface *st = stapi->get_current(stapi); 1348 struct st_framebuffer_iface* stfbi = drawable->stfb; 1349 struct pipe_resource *res; 1350 int x, y, w, h; 1351 enum st_attachment_type st_attachment = xmesa_attachment_type(buffer); 1352 1353 x = 0; 1354 y = 0; 1355 w = drawable->width; 1356 h = drawable->height; 1357 1358 /* We need to validate our attachments before using them, 1359 * in case the texture doesn't exist yet. */ 1360 xmesa_st_framebuffer_validate_textures(stfbi, w, h, 1 << st_attachment); 1361 res = xmesa_get_attachment(stfbi, st_attachment); 1362 1363 if (res) { 1364 struct pipe_context* pipe = xmesa_get_context(stfbi); 1365 enum pipe_format internal_format = res->format; 1366 struct pipe_transfer *tex_xfer; 1367 char *map; 1368 int line, ximage_stride; 1369 XImage *img; 1370 1371 internal_format = choose_pixel_format(drawable->xm_visual); 1372 1373 tex_xfer = pipe_get_transfer(pipe, res, 1374 0, 0, /* level, layer */ 1375 PIPE_TRANSFER_WRITE, 1376 x, y, 1377 w, h); 1378 if (!tex_xfer) 1379 return; 1380 1381 /* Grab the XImage that we want to turn into a texture. */ 1382 img = XGetImage(dpy, 1383 drawable->ws.drawable, 1384 x, y, 1385 w, h, 1386 AllPlanes, 1387 ZPixmap); 1388 1389 if (!img) { 1390 pipe_transfer_destroy(pipe, tex_xfer); 1391 return; 1392 } 1393 1394 map = pipe_transfer_map(pipe, tex_xfer); 1395 1396 if (!map) { 1397 pipe_transfer_destroy(pipe, tex_xfer); 1398 return; 1399 } 1400 1401 /* The pipe transfer has a pitch rounded up to the nearest 64 pixels. 1402 We assume 32 bit pixels. */ 1403 ximage_stride = w * 4; 1404 1405 for (line = 0; line < h; line++) 1406 memcpy(&map[line * tex_xfer->stride], 1407 &img->data[line * ximage_stride], 1408 ximage_stride); 1409 1410 pipe_transfer_unmap(pipe, tex_xfer); 1411 1412 pipe_transfer_destroy(pipe, tex_xfer); 1413 1414 st->teximage(st, 1415 ST_TEXTURE_2D, 1416 0, /* level */ 1417 internal_format, 1418 res, 1419 FALSE /* no mipmap */); 1420 1421 } 1422 } 1423 1424 1425 1426 PUBLIC void 1427 XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer) 1428 { 1429 } 1430 1431 1432 void 1433 XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask) 1434 { 1435 if (dst->st->copy) 1436 dst->st->copy(dst->st, src->st, mask); 1437 } 1438
