xm_api.c revision 685bb6941681f89f71a9169594d87c8e314b94d0
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 "main/context.h" 60#include "pipe/p_defines.h" 61#include "pipe/p_screen.h" 62#include "pipe/p_context.h" 63 64#include "xm_public.h" 65#include <GL/glx.h> 66 67 68/* Driver interface routines, set up by xlib backend on library 69 * _init(). These are global in the same way that function names are 70 * global. 71 */ 72static struct xm_driver driver; 73static struct st_api *stapi; 74 75void xmesa_set_driver( const struct xm_driver *templ ) 76{ 77 driver = *templ; 78 stapi = driver.create_st_api(); 79} 80 81 82/* 83 * XXX replace this with a linked list, or better yet, try to attach the 84 * gallium/mesa extra bits to the X Display object with XAddExtension(). 85 */ 86#define MAX_DISPLAYS 10 87static struct xmesa_display Displays[MAX_DISPLAYS]; 88static int NumDisplays = 0; 89 90 91static XMesaDisplay 92xmesa_init_display( Display *display ) 93{ 94 pipe_static_mutex(init_mutex); 95 XMesaDisplay xmdpy; 96 int i; 97 98 pipe_mutex_lock(init_mutex); 99 100 /* Look for XMesaDisplay which corresponds to 'display' */ 101 for (i = 0; i < NumDisplays; i++) { 102 if (Displays[i].display == display) { 103 /* Found it */ 104 pipe_mutex_unlock(init_mutex); 105 return &Displays[i]; 106 } 107 } 108 109 /* Create new XMesaDisplay */ 110 111 assert(NumDisplays < MAX_DISPLAYS); 112 xmdpy = &Displays[NumDisplays]; 113 NumDisplays++; 114 115 if (!xmdpy->display && display) { 116 xmdpy->display = display; 117 xmdpy->screen = driver.create_pipe_screen(display); 118 xmdpy->smapi = CALLOC_STRUCT(st_manager); 119 if (xmdpy->smapi) 120 xmdpy->smapi->screen = xmdpy->screen; 121 122 if (xmdpy->screen && xmdpy->smapi) { 123 pipe_mutex_init(xmdpy->mutex); 124 } 125 else { 126 if (xmdpy->screen) { 127 xmdpy->screen->destroy(xmdpy->screen); 128 xmdpy->screen = NULL; 129 } 130 if (xmdpy->smapi) { 131 FREE(xmdpy->smapi); 132 xmdpy->smapi = NULL; 133 } 134 135 xmdpy->display = NULL; 136 } 137 } 138 if (!xmdpy->display || xmdpy->display != display) 139 xmdpy = NULL; 140 141 pipe_mutex_unlock(init_mutex); 142 143 return xmdpy; 144} 145 146/**********************************************************************/ 147/***** X Utility Functions *****/ 148/**********************************************************************/ 149 150 151/** 152 * Return the host's byte order as LSBFirst or MSBFirst ala X. 153 */ 154static int host_byte_order( void ) 155{ 156 int i = 1; 157 char *cptr = (char *) &i; 158 return (*cptr==1) ? LSBFirst : MSBFirst; 159} 160 161 162 163 164/** 165 * Return the true number of bits per pixel for XImages. 166 * For example, if we request a 24-bit deep visual we may actually need/get 167 * 32bpp XImages. This function returns the appropriate bpp. 168 * Input: dpy - the X display 169 * visinfo - desribes the visual to be used for XImages 170 * Return: true number of bits per pixel for XImages 171 */ 172static int 173bits_per_pixel( XMesaVisual xmv ) 174{ 175 Display *dpy = xmv->display; 176 XVisualInfo * visinfo = xmv->visinfo; 177 XImage *img; 178 int bitsPerPixel; 179 /* Create a temporary XImage */ 180 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 181 ZPixmap, 0, /*format, offset*/ 182 (char*) MALLOC(8), /*data*/ 183 1, 1, /*width, height*/ 184 32, /*bitmap_pad*/ 185 0 /*bytes_per_line*/ 186 ); 187 assert(img); 188 /* grab the bits/pixel value */ 189 bitsPerPixel = img->bits_per_pixel; 190 /* free the XImage */ 191 free( img->data ); 192 img->data = NULL; 193 XDestroyImage( img ); 194 return bitsPerPixel; 195} 196 197 198 199/* 200 * Determine if a given X window ID is valid (window exists). 201 * Do this by calling XGetWindowAttributes() for the window and 202 * checking if we catch an X error. 203 * Input: dpy - the display 204 * win - the window to check for existance 205 * Return: GL_TRUE - window exists 206 * GL_FALSE - window doesn't exist 207 */ 208static GLboolean WindowExistsFlag; 209 210static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr ) 211{ 212 (void) dpy; 213 if (xerr->error_code == BadWindow) { 214 WindowExistsFlag = GL_FALSE; 215 } 216 return 0; 217} 218 219static GLboolean window_exists( Display *dpy, Window win ) 220{ 221 XWindowAttributes wa; 222 int (*old_handler)( Display*, XErrorEvent* ); 223 WindowExistsFlag = GL_TRUE; 224 old_handler = XSetErrorHandler(window_exists_err_handler); 225 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 226 XSetErrorHandler(old_handler); 227 return WindowExistsFlag; 228} 229 230static Status 231get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height ) 232{ 233 Window root; 234 Status stat; 235 int xpos, ypos; 236 unsigned int w, h, bw, depth; 237 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 238 *width = w; 239 *height = h; 240 return stat; 241} 242 243 244/** 245 * Return the size of the window (or pixmap) that corresponds to the 246 * given XMesaBuffer. 247 * \param width returns width in pixels 248 * \param height returns height in pixels 249 */ 250void 251xmesa_get_window_size(Display *dpy, XMesaBuffer b, 252 GLuint *width, GLuint *height) 253{ 254 XMesaDisplay xmdpy = xmesa_init_display(dpy); 255 Status stat; 256 257 pipe_mutex_lock(xmdpy->mutex); 258 XSync(b->xm_visual->display, 0); /* added for Chromium */ 259 stat = get_drawable_size(dpy, b->ws.drawable, width, height); 260 pipe_mutex_unlock(xmdpy->mutex); 261 262 if (!stat) { 263 /* probably querying a window that's recently been destroyed */ 264 _mesa_warning(NULL, "XGetGeometry failed!\n"); 265 *width = *height = 1; 266 } 267} 268 269#define GET_REDMASK(__v) __v->mesa_visual.redMask 270#define GET_GREENMASK(__v) __v->mesa_visual.greenMask 271#define GET_BLUEMASK(__v) __v->mesa_visual.blueMask 272 273 274/** 275 * Choose the pixel format for the given visual. 276 * This will tell the gallium driver how to pack pixel data into 277 * drawing surfaces. 278 */ 279static GLuint 280choose_pixel_format(XMesaVisual v) 281{ 282 boolean native_byte_order = (host_byte_order() == 283 ImageByteOrder(v->display)); 284 285 if ( GET_REDMASK(v) == 0x0000ff 286 && GET_GREENMASK(v) == 0x00ff00 287 && GET_BLUEMASK(v) == 0xff0000 288 && v->BitsPerPixel == 32) { 289 if (native_byte_order) { 290 /* no byteswapping needed */ 291 return PIPE_FORMAT_R8G8B8A8_UNORM; 292 } 293 else { 294 return PIPE_FORMAT_A8B8G8R8_UNORM; 295 } 296 } 297 else if ( GET_REDMASK(v) == 0xff0000 298 && GET_GREENMASK(v) == 0x00ff00 299 && GET_BLUEMASK(v) == 0x0000ff 300 && v->BitsPerPixel == 32) { 301 if (native_byte_order) { 302 /* no byteswapping needed */ 303 return PIPE_FORMAT_B8G8R8A8_UNORM; 304 } 305 else { 306 return PIPE_FORMAT_A8R8G8B8_UNORM; 307 } 308 } 309 else if ( GET_REDMASK(v) == 0x0000ff00 310 && GET_GREENMASK(v) == 0x00ff0000 311 && GET_BLUEMASK(v) == 0xff000000 312 && v->BitsPerPixel == 32) { 313 if (native_byte_order) { 314 /* no byteswapping needed */ 315 return PIPE_FORMAT_A8R8G8B8_UNORM; 316 } 317 else { 318 return PIPE_FORMAT_B8G8R8A8_UNORM; 319 } 320 } 321 else if ( GET_REDMASK(v) == 0xf800 322 && GET_GREENMASK(v) == 0x07e0 323 && GET_BLUEMASK(v) == 0x001f 324 && native_byte_order 325 && v->BitsPerPixel == 16) { 326 /* 5-6-5 RGB */ 327 return PIPE_FORMAT_B5G6R5_UNORM; 328 } 329 330 return PIPE_FORMAT_NONE; 331} 332 333 334/** 335 * Choose a depth/stencil format that satisfies the given depth and 336 * stencil sizes. 337 */ 338static enum pipe_format 339choose_depth_stencil_format(XMesaDisplay xmdpy, int depth, int stencil) 340{ 341 const enum pipe_texture_target target = PIPE_TEXTURE_2D; 342 const unsigned tex_usage = PIPE_BIND_DEPTH_STENCIL; 343 const unsigned geom_flags = (PIPE_TEXTURE_GEOM_NON_SQUARE | 344 PIPE_TEXTURE_GEOM_NON_POWER_OF_TWO); 345 const unsigned sample_count = 0; 346 enum pipe_format formats[8], fmt; 347 int count, i; 348 349 count = 0; 350 351 if (depth <= 16 && stencil == 0) { 352 formats[count++] = PIPE_FORMAT_Z16_UNORM; 353 } 354 if (depth <= 24 && stencil == 0) { 355 formats[count++] = PIPE_FORMAT_X8Z24_UNORM; 356 formats[count++] = PIPE_FORMAT_Z24X8_UNORM; 357 } 358 if (depth <= 24 && stencil <= 8) { 359 formats[count++] = PIPE_FORMAT_S8_USCALED_Z24_UNORM; 360 formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_USCALED; 361 } 362 if (depth <= 32 && stencil == 0) { 363 formats[count++] = PIPE_FORMAT_Z32_UNORM; 364 } 365 366 fmt = PIPE_FORMAT_NONE; 367 for (i = 0; i < count; i++) { 368 if (xmdpy->screen->is_format_supported(xmdpy->screen, formats[i], 369 target, sample_count, 370 tex_usage, geom_flags)) { 371 fmt = formats[i]; 372 break; 373 } 374 } 375 376 return fmt; 377} 378 379 380 381/**********************************************************************/ 382/***** Linked list of XMesaBuffers *****/ 383/**********************************************************************/ 384 385static XMesaBuffer XMesaBufferList = NULL; 386 387 388/** 389 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 390 * Note that XMesaBuffer is derived from GLframebuffer. 391 * The new XMesaBuffer will not have any size (Width=Height=0). 392 * 393 * \param d the corresponding X drawable (window or pixmap) 394 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 395 * \param vis the buffer's visual 396 * \param cmap the window's colormap, if known. 397 * \return new XMesaBuffer or NULL if any problem 398 */ 399static XMesaBuffer 400create_xmesa_buffer(Drawable d, BufferType type, 401 XMesaVisual vis, Colormap cmap) 402{ 403 XMesaDisplay xmdpy = xmesa_init_display(vis->display); 404 XMesaBuffer b; 405 uint width, height; 406 407 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 408 409 if (!xmdpy) 410 return NULL; 411 412 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 413 if (!b) 414 return NULL; 415 416 b->ws.drawable = d; 417 b->ws.visual = vis->visinfo->visual; 418 b->ws.depth = vis->visinfo->depth; 419 420 b->xm_visual = vis; 421 b->type = type; 422 b->cmap = cmap; 423 424 get_drawable_size(vis->display, d, &width, &height); 425 426 /* 427 * Create framebuffer, but we'll plug in our own renderbuffers below. 428 */ 429 b->stfb = xmesa_create_st_framebuffer(xmdpy, b); 430 431 /* GLX_EXT_texture_from_pixmap */ 432 b->TextureTarget = 0; 433 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 434 b->TextureMipmap = 0; 435 436 /* insert buffer into linked list */ 437 b->Next = XMesaBufferList; 438 XMesaBufferList = b; 439 440 return b; 441} 442 443 444/** 445 * Find an XMesaBuffer by matching X display and colormap but NOT matching 446 * the notThis buffer. 447 */ 448XMesaBuffer 449xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis) 450{ 451 XMesaBuffer b; 452 for (b = XMesaBufferList; b; b = b->Next) { 453 if (b->xm_visual->display == dpy && 454 b->cmap == cmap && 455 b != notThis) { 456 return b; 457 } 458 } 459 return NULL; 460} 461 462 463/** 464 * Remove buffer from linked list, delete if no longer referenced. 465 */ 466static void 467xmesa_free_buffer(XMesaBuffer buffer) 468{ 469 XMesaBuffer prev = NULL, b; 470 471 for (b = XMesaBufferList; b; b = b->Next) { 472 if (b == buffer) { 473 /* unlink buffer from list */ 474 if (prev) 475 prev->Next = buffer->Next; 476 else 477 XMesaBufferList = buffer->Next; 478 479 /* Since the X window for the XMesaBuffer is going away, we don't 480 * want to dereference this pointer in the future. 481 */ 482 b->ws.drawable = 0; 483 484 /* XXX we should move the buffer to a delete-pending list and destroy 485 * the buffer until it is no longer current. 486 */ 487 xmesa_destroy_st_framebuffer(buffer->stfb); 488 489 free(buffer); 490 491 return; 492 } 493 /* continue search */ 494 prev = b; 495 } 496 /* buffer not found in XMesaBufferList */ 497 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 498} 499 500 501 502/**********************************************************************/ 503/***** Misc Private Functions *****/ 504/**********************************************************************/ 505 506 507/** 508 * When a context is bound for the first time, we can finally finish 509 * initializing the context's visual and buffer information. 510 * \param v the XMesaVisual to initialize 511 * \param b the XMesaBuffer to initialize (may be NULL) 512 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 513 * \param window the window/pixmap we're rendering into 514 * \param cmap the colormap associated with the window/pixmap 515 * \return GL_TRUE=success, GL_FALSE=failure 516 */ 517static GLboolean 518initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 519 GLboolean rgb_flag, Drawable window, 520 Colormap cmap) 521{ 522 ASSERT(!b || b->xm_visual == v); 523 524 /* Save true bits/pixel */ 525 v->BitsPerPixel = bits_per_pixel(v); 526 assert(v->BitsPerPixel > 0); 527 528 if (rgb_flag == GL_FALSE) { 529 /* COLOR-INDEXED WINDOW: not supported*/ 530 return GL_FALSE; 531 } 532 else { 533 /* RGB WINDOW: 534 * We support RGB rendering into almost any kind of visual. 535 */ 536 const int xclass = v->mesa_visual.visualType; 537 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) { 538 _mesa_warning(NULL, 539 "XMesa: RGB mode rendering not supported in given visual.\n"); 540 return GL_FALSE; 541 } 542 v->mesa_visual.indexBits = 0; 543 544 if (v->BitsPerPixel == 32) { 545 /* We use XImages for all front/back buffers. If an X Window or 546 * X Pixmap is 32bpp, there's no guarantee that the alpha channel 547 * will be preserved. For XImages we're in luck. 548 */ 549 v->mesa_visual.alphaBits = 8; 550 } 551 } 552 553 /* 554 * If MESA_INFO env var is set print out some debugging info 555 * which can help Brian figure out what's going on when a user 556 * reports bugs. 557 */ 558 if (_mesa_getenv("MESA_INFO")) { 559 printf("X/Mesa visual = %p\n", (void *) v); 560 printf("X/Mesa level = %d\n", v->mesa_visual.level); 561 printf("X/Mesa depth = %d\n", v->visinfo->depth); 562 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 563 } 564 565 return GL_TRUE; 566} 567 568 569 570#define NUM_VISUAL_TYPES 6 571 572/** 573 * Convert an X visual type to a GLX visual type. 574 * 575 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 576 * to be converted. 577 * \return If \c visualType is a valid X visual type, a GLX visual type will 578 * be returned. Otherwise \c GLX_NONE will be returned. 579 * 580 * \note 581 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 582 * DRI CVS tree. 583 */ 584static GLint 585xmesa_convert_from_x_visual_type( int visualType ) 586{ 587 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 588 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 589 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 590 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 591 }; 592 593 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 594 ? glx_visual_types[ visualType ] : GLX_NONE; 595} 596 597 598/**********************************************************************/ 599/***** Public Functions *****/ 600/**********************************************************************/ 601 602 603/* 604 * Create a new X/Mesa visual. 605 * Input: display - X11 display 606 * visinfo - an XVisualInfo pointer 607 * rgb_flag - GL_TRUE = RGB mode, 608 * GL_FALSE = color index mode 609 * alpha_flag - alpha buffer requested? 610 * db_flag - GL_TRUE = double-buffered, 611 * GL_FALSE = single buffered 612 * stereo_flag - stereo visual? 613 * ximage_flag - GL_TRUE = use an XImage for back buffer, 614 * GL_FALSE = use an off-screen pixmap for back buffer 615 * depth_size - requested bits/depth values, or zero 616 * stencil_size - requested bits/stencil values, or zero 617 * accum_red_size - requested bits/red accum values, or zero 618 * accum_green_size - requested bits/green accum values, or zero 619 * accum_blue_size - requested bits/blue accum values, or zero 620 * accum_alpha_size - requested bits/alpha accum values, or zero 621 * num_samples - number of samples/pixel if multisampling, or zero 622 * level - visual level, usually 0 623 * visualCaveat - ala the GLX extension, usually GLX_NONE 624 * Return; a new XMesaVisual or 0 if error. 625 */ 626PUBLIC 627XMesaVisual XMesaCreateVisual( Display *display, 628 XVisualInfo * visinfo, 629 GLboolean rgb_flag, 630 GLboolean alpha_flag, 631 GLboolean db_flag, 632 GLboolean stereo_flag, 633 GLboolean ximage_flag, 634 GLint depth_size, 635 GLint stencil_size, 636 GLint accum_red_size, 637 GLint accum_green_size, 638 GLint accum_blue_size, 639 GLint accum_alpha_size, 640 GLint num_samples, 641 GLint level, 642 GLint visualCaveat ) 643{ 644 XMesaDisplay xmdpy = xmesa_init_display(display); 645 XMesaVisual v; 646 GLint red_bits, green_bits, blue_bits, alpha_bits; 647 648 if (!xmdpy) 649 return NULL; 650 651 /* For debugging only */ 652 if (_mesa_getenv("MESA_XSYNC")) { 653 /* This makes debugging X easier. 654 * In your debugger, set a breakpoint on _XError to stop when an 655 * X protocol error is generated. 656 */ 657 XSynchronize( display, 1 ); 658 } 659 660 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 661 if (!v) { 662 return NULL; 663 } 664 665 v->display = display; 666 667 /* Save a copy of the XVisualInfo struct because the user may Xfree() 668 * the struct but we may need some of the information contained in it 669 * at a later time. 670 */ 671 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 672 if (!v->visinfo) { 673 free(v); 674 return NULL; 675 } 676 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 677 678 v->ximage_flag = ximage_flag; 679 680 v->mesa_visual.redMask = visinfo->red_mask; 681 v->mesa_visual.greenMask = visinfo->green_mask; 682 v->mesa_visual.blueMask = visinfo->blue_mask; 683 v->mesa_visual.visualID = visinfo->visualid; 684 v->mesa_visual.screen = visinfo->screen; 685 686#if !(defined(__cplusplus) || defined(c_plusplus)) 687 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 688#else 689 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 690#endif 691 692 v->mesa_visual.visualRating = visualCaveat; 693 694 if (alpha_flag) 695 v->mesa_visual.alphaBits = 8; 696 697 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 698 699 { 700 const int xclass = v->mesa_visual.visualType; 701 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 702 red_bits = _mesa_bitcount(GET_REDMASK(v)); 703 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 704 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 705 } 706 else { 707 /* this is an approximation */ 708 int depth; 709 depth = v->visinfo->depth; 710 red_bits = depth / 3; 711 depth -= red_bits; 712 green_bits = depth / 2; 713 depth -= green_bits; 714 blue_bits = depth; 715 alpha_bits = 0; 716 assert( red_bits + green_bits + blue_bits == v->visinfo->depth ); 717 } 718 alpha_bits = v->mesa_visual.alphaBits; 719 } 720 721 _mesa_initialize_visual( &v->mesa_visual, 722 db_flag, stereo_flag, 723 red_bits, green_bits, 724 blue_bits, alpha_bits, 725 depth_size, 726 stencil_size, 727 accum_red_size, accum_green_size, 728 accum_blue_size, accum_alpha_size, 729 0 ); 730 731 v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK; 732 if (db_flag) 733 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK; 734 if (stereo_flag) { 735 v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK; 736 if (db_flag) 737 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK; 738 } 739 740 v->stvis.color_format = choose_pixel_format(v); 741 if (v->stvis.color_format == PIPE_FORMAT_NONE) { 742 FREE(v->visinfo); 743 FREE(v); 744 return NULL; 745 } 746 747 v->stvis.depth_stencil_format = 748 choose_depth_stencil_format(xmdpy, depth_size, stencil_size); 749 750 v->stvis.accum_format = (accum_red_size + 751 accum_green_size + accum_blue_size + accum_alpha_size) ? 752 PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE; 753 754 v->stvis.samples = num_samples; 755 v->stvis.render_buffer = ST_ATTACHMENT_INVALID; 756 757 /* XXX minor hack */ 758 v->mesa_visual.level = level; 759 return v; 760} 761 762 763PUBLIC 764void XMesaDestroyVisual( XMesaVisual v ) 765{ 766 free(v->visinfo); 767 free(v); 768} 769 770 771/** 772 * Do per-display initializations. 773 */ 774void 775xmesa_init( Display *display ) 776{ 777 xmesa_init_display(display); 778} 779 780 781/** 782 * Create a new XMesaContext. 783 * \param v the XMesaVisual 784 * \param share_list another XMesaContext with which to share display 785 * lists or NULL if no sharing is wanted. 786 * \return an XMesaContext or NULL if error. 787 */ 788PUBLIC 789XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 790{ 791 XMesaDisplay xmdpy = xmesa_init_display(v->display); 792 XMesaContext c; 793 794 if (!xmdpy) 795 return NULL; 796 797 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 798 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 799 if (!c) 800 return NULL; 801 802 c->xm_visual = v; 803 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 804 c->xm_read_buffer = NULL; 805 806 c->st = stapi->create_context(stapi, xmdpy->smapi, 807 &v->stvis, (share_list) ? share_list->st : NULL); 808 if (c->st == NULL) 809 goto fail; 810 811 c->st->st_manager_private = (void *) c; 812 813 return c; 814 815fail: 816 if (c->st) 817 c->st->destroy(c->st); 818 819 free(c); 820 return NULL; 821} 822 823 824 825PUBLIC 826void XMesaDestroyContext( XMesaContext c ) 827{ 828 c->st->destroy(c->st); 829 830 /* FIXME: We should destroy the screen here, but if we do so, surfaces may 831 * outlive it, causing segfaults 832 struct pipe_screen *screen = c->st->pipe->screen; 833 screen->destroy(screen); 834 */ 835 836 free(c); 837} 838 839 840 841/** 842 * Private function for creating an XMesaBuffer which corresponds to an 843 * X window or pixmap. 844 * \param v the window's XMesaVisual 845 * \param w the window we're wrapping 846 * \return new XMesaBuffer or NULL if error 847 */ 848PUBLIC XMesaBuffer 849XMesaCreateWindowBuffer(XMesaVisual v, Window w) 850{ 851 XWindowAttributes attr; 852 XMesaBuffer b; 853 Colormap cmap; 854 int depth; 855 856 assert(v); 857 assert(w); 858 859 /* Check that window depth matches visual depth */ 860 XGetWindowAttributes( v->display, w, &attr ); 861 depth = attr.depth; 862 if (v->visinfo->depth != depth) { 863 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 864 v->visinfo->depth, depth); 865 return NULL; 866 } 867 868 /* Find colormap */ 869 if (attr.colormap) { 870 cmap = attr.colormap; 871 } 872 else { 873 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 874 /* this is weird, a window w/out a colormap!? */ 875 /* OK, let's just allocate a new one and hope for the best */ 876 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 877 } 878 879 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap); 880 if (!b) 881 return NULL; 882 883 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 884 (Drawable) w, cmap )) { 885 xmesa_free_buffer(b); 886 return NULL; 887 } 888 889 return b; 890} 891 892 893 894/** 895 * Create a new XMesaBuffer from an X pixmap. 896 * 897 * \param v the XMesaVisual 898 * \param p the pixmap 899 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 900 * \c GLX_DIRECT_COLOR visual for the pixmap 901 * \returns new XMesaBuffer or NULL if error 902 */ 903PUBLIC XMesaBuffer 904XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap) 905{ 906 XMesaBuffer b; 907 908 assert(v); 909 910 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 911 if (!b) 912 return NULL; 913 914 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 915 (Drawable) p, cmap)) { 916 xmesa_free_buffer(b); 917 return NULL; 918 } 919 920 return b; 921} 922 923 924/** 925 * For GLX_EXT_texture_from_pixmap 926 */ 927XMesaBuffer 928XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p, 929 Colormap cmap, 930 int format, int target, int mipmap) 931{ 932 GET_CURRENT_CONTEXT(ctx); 933 XMesaBuffer b; 934 935 assert(v); 936 937 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 938 if (!b) 939 return NULL; 940 941 /* get pixmap size */ 942 xmesa_get_window_size(v->display, b, &b->width, &b->height); 943 944 if (target == 0) { 945 /* examine dims */ 946 if (ctx->Extensions.ARB_texture_non_power_of_two) { 947 target = GLX_TEXTURE_2D_EXT; 948 } 949 else if ( _mesa_bitcount(b->width) == 1 950 && _mesa_bitcount(b->height) == 1) { 951 /* power of two size */ 952 if (b->height == 1) { 953 target = GLX_TEXTURE_1D_EXT; 954 } 955 else { 956 target = GLX_TEXTURE_2D_EXT; 957 } 958 } 959 else if (ctx->Extensions.NV_texture_rectangle) { 960 target = GLX_TEXTURE_RECTANGLE_EXT; 961 } 962 else { 963 /* non power of two textures not supported */ 964 XMesaDestroyBuffer(b); 965 return 0; 966 } 967 } 968 969 b->TextureTarget = target; 970 b->TextureFormat = format; 971 b->TextureMipmap = mipmap; 972 973 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 974 (Drawable) p, cmap)) { 975 xmesa_free_buffer(b); 976 return NULL; 977 } 978 979 return b; 980} 981 982 983 984XMesaBuffer 985XMesaCreatePBuffer(XMesaVisual v, Colormap cmap, 986 unsigned int width, unsigned int height) 987{ 988 Window root; 989 Drawable drawable; /* X Pixmap Drawable */ 990 XMesaBuffer b; 991 992 /* allocate pixmap for front buffer */ 993 root = RootWindow( v->display, v->visinfo->screen ); 994 drawable = XCreatePixmap(v->display, root, width, height, 995 v->visinfo->depth); 996 if (!drawable) 997 return NULL; 998 999 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1000 if (!b) 1001 return NULL; 1002 1003 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1004 drawable, cmap)) { 1005 xmesa_free_buffer(b); 1006 return NULL; 1007 } 1008 1009 return b; 1010} 1011 1012 1013 1014/* 1015 * Deallocate an XMesaBuffer structure and all related info. 1016 */ 1017PUBLIC void 1018XMesaDestroyBuffer(XMesaBuffer b) 1019{ 1020 xmesa_free_buffer(b); 1021} 1022 1023 1024/** 1025 * Query the current drawable size and notify the binding context. 1026 */ 1027void 1028xmesa_check_buffer_size(XMesaBuffer b) 1029{ 1030 XMesaContext xmctx = XMesaGetCurrentContext(); 1031 1032 if (b->type == PBUFFER) 1033 return; 1034 1035 xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height); 1036 if (xmctx && xmctx->xm_buffer == b) 1037 xmctx->st->notify_invalid_framebuffer(xmctx->st, b->stfb); 1038} 1039 1040 1041/* 1042 * Bind buffer b to context c and make c the current rendering context. 1043 */ 1044PUBLIC 1045GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1046 XMesaBuffer readBuffer ) 1047{ 1048 XMesaContext old_ctx = XMesaGetCurrentContext(); 1049 1050 if (old_ctx && old_ctx != c) { 1051 XMesaFlush(old_ctx); 1052 old_ctx->xm_buffer = NULL; 1053 old_ctx->xm_read_buffer = NULL; 1054 } 1055 1056 if (c) { 1057 if (!drawBuffer || !readBuffer) 1058 return GL_FALSE; /* must specify buffers! */ 1059 1060 if (c == old_ctx && 1061 c->xm_buffer == drawBuffer && 1062 c->xm_read_buffer == readBuffer) 1063 return GL_TRUE; 1064 1065 xmesa_check_buffer_size(drawBuffer); 1066 if (readBuffer != drawBuffer) 1067 xmesa_check_buffer_size(readBuffer); 1068 1069 c->xm_buffer = drawBuffer; 1070 c->xm_read_buffer = readBuffer; 1071 1072 stapi->make_current(stapi, c->st, drawBuffer->stfb, readBuffer->stfb); 1073 1074 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1075 drawBuffer->wasCurrent = GL_TRUE; 1076 } 1077 else { 1078 /* Detach */ 1079 stapi->make_current(stapi, NULL, NULL, NULL); 1080 1081 } 1082 return GL_TRUE; 1083} 1084 1085 1086/* 1087 * Unbind the context c from its buffer. 1088 */ 1089GLboolean XMesaUnbindContext( XMesaContext c ) 1090{ 1091 /* A no-op for XFree86 integration purposes */ 1092 return GL_TRUE; 1093} 1094 1095 1096XMesaContext XMesaGetCurrentContext( void ) 1097{ 1098 struct st_context_iface *st = stapi->get_current(stapi); 1099 return (XMesaContext) (st) ? st->st_manager_private : NULL; 1100} 1101 1102 1103 1104/** 1105 * Swap front and back color buffers and have winsys display front buffer. 1106 * If there's no front color buffer no swap actually occurs. 1107 */ 1108PUBLIC 1109void XMesaSwapBuffers( XMesaBuffer b ) 1110{ 1111 XMesaContext xmctx = XMesaGetCurrentContext(); 1112 1113 if (xmctx && xmctx->xm_buffer == b) { 1114 xmctx->st->flush( xmctx->st, 1115 PIPE_FLUSH_RENDER_CACHE | 1116 PIPE_FLUSH_SWAPBUFFERS | 1117 PIPE_FLUSH_FRAME, 1118 NULL); 1119 } 1120 1121 xmesa_swap_st_framebuffer(b->stfb); 1122} 1123 1124 1125 1126/* 1127 * Copy sub-region of back buffer to front buffer 1128 */ 1129void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1130{ 1131 xmesa_copy_st_framebuffer(b->stfb, 1132 ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT, 1133 x, y, width, height); 1134} 1135 1136 1137 1138void XMesaFlush( XMesaContext c ) 1139{ 1140 if (c && c->xm_visual->display) { 1141 XMesaDisplay xmdpy = xmesa_init_display(c->xm_visual->display); 1142 struct pipe_fence_handle *fence = NULL; 1143 1144 c->st->flush(c->st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence); 1145 if (fence) { 1146 xmdpy->screen->fence_finish(xmdpy->screen, fence, 0); 1147 xmdpy->screen->fence_reference(xmdpy->screen, &fence, NULL); 1148 } 1149 XSync( c->xm_visual->display, False ); 1150 } 1151} 1152 1153 1154 1155 1156 1157XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d ) 1158{ 1159 XMesaBuffer b; 1160 for (b = XMesaBufferList; b; b = b->Next) { 1161 if (b->ws.drawable == d && b->xm_visual->display == dpy) { 1162 return b; 1163 } 1164 } 1165 return NULL; 1166} 1167 1168 1169/** 1170 * Free/destroy all XMesaBuffers associated with given display. 1171 */ 1172void xmesa_destroy_buffers_on_display(Display *dpy) 1173{ 1174 XMesaBuffer b, next; 1175 for (b = XMesaBufferList; b; b = next) { 1176 next = b->Next; 1177 if (b->xm_visual->display == dpy) { 1178 xmesa_free_buffer(b); 1179 } 1180 } 1181} 1182 1183 1184/* 1185 * Look for XMesaBuffers whose X window has been destroyed. 1186 * Deallocate any such XMesaBuffers. 1187 */ 1188void XMesaGarbageCollect( void ) 1189{ 1190 XMesaBuffer b, next; 1191 for (b=XMesaBufferList; b; b=next) { 1192 next = b->Next; 1193 if (b->xm_visual && 1194 b->xm_visual->display && 1195 b->ws.drawable && 1196 b->type == WINDOW) { 1197 XSync(b->xm_visual->display, False); 1198 if (!window_exists( b->xm_visual->display, b->ws.drawable )) { 1199 /* found a dead window, free the ancillary info */ 1200 XMesaDestroyBuffer( b ); 1201 } 1202 } 1203 } 1204} 1205 1206 1207 1208 1209PUBLIC void 1210XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer, 1211 const int *attrib_list) 1212{ 1213} 1214 1215 1216 1217PUBLIC void 1218XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer) 1219{ 1220} 1221 1222 1223void 1224XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask) 1225{ 1226 if (dst->st->copy) 1227 dst->st->copy(dst->st, src->st, mask); 1228} 1229