xm_api.c revision 83adf8c3a4fd75b7877e1894f6f32a04a4d0bf06
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 90static int 91xmesa_get_param(struct st_manager *smapi, 92 enum st_manager_param param) 93{ 94 return 0; 95} 96 97static XMesaDisplay 98xmesa_init_display( Display *display ) 99{ 100 pipe_static_mutex(init_mutex); 101 XMesaDisplay xmdpy; 102 int i; 103 104 pipe_mutex_lock(init_mutex); 105 106 /* Look for XMesaDisplay which corresponds to 'display' */ 107 for (i = 0; i < NumDisplays; i++) { 108 if (Displays[i].display == display) { 109 /* Found it */ 110 pipe_mutex_unlock(init_mutex); 111 return &Displays[i]; 112 } 113 } 114 115 /* Create new XMesaDisplay */ 116 117 assert(NumDisplays < MAX_DISPLAYS); 118 xmdpy = &Displays[NumDisplays]; 119 NumDisplays++; 120 121 if (!xmdpy->display && display) { 122 xmdpy->display = display; 123 xmdpy->screen = driver.create_pipe_screen(display); 124 xmdpy->smapi = CALLOC_STRUCT(st_manager); 125 if (xmdpy->smapi) { 126 xmdpy->smapi->screen = xmdpy->screen; 127 xmdpy->smapi->get_param = xmesa_get_param; 128 } 129 130 if (xmdpy->screen && xmdpy->smapi) { 131 pipe_mutex_init(xmdpy->mutex); 132 } 133 else { 134 if (xmdpy->screen) { 135 xmdpy->screen->destroy(xmdpy->screen); 136 xmdpy->screen = NULL; 137 } 138 if (xmdpy->smapi) { 139 FREE(xmdpy->smapi); 140 xmdpy->smapi = NULL; 141 } 142 143 xmdpy->display = NULL; 144 } 145 } 146 if (!xmdpy->display || xmdpy->display != display) 147 xmdpy = NULL; 148 149 pipe_mutex_unlock(init_mutex); 150 151 return xmdpy; 152} 153 154/**********************************************************************/ 155/***** X Utility Functions *****/ 156/**********************************************************************/ 157 158 159/** 160 * Return the host's byte order as LSBFirst or MSBFirst ala X. 161 */ 162static int host_byte_order( void ) 163{ 164 int i = 1; 165 char *cptr = (char *) &i; 166 return (*cptr==1) ? LSBFirst : MSBFirst; 167} 168 169 170 171 172/** 173 * Return the true number of bits per pixel for XImages. 174 * For example, if we request a 24-bit deep visual we may actually need/get 175 * 32bpp XImages. This function returns the appropriate bpp. 176 * Input: dpy - the X display 177 * visinfo - desribes the visual to be used for XImages 178 * Return: true number of bits per pixel for XImages 179 */ 180static int 181bits_per_pixel( XMesaVisual xmv ) 182{ 183 Display *dpy = xmv->display; 184 XVisualInfo * visinfo = xmv->visinfo; 185 XImage *img; 186 int bitsPerPixel; 187 /* Create a temporary XImage */ 188 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 189 ZPixmap, 0, /*format, offset*/ 190 (char*) MALLOC(8), /*data*/ 191 1, 1, /*width, height*/ 192 32, /*bitmap_pad*/ 193 0 /*bytes_per_line*/ 194 ); 195 assert(img); 196 /* grab the bits/pixel value */ 197 bitsPerPixel = img->bits_per_pixel; 198 /* free the XImage */ 199 free( img->data ); 200 img->data = NULL; 201 XDestroyImage( img ); 202 return bitsPerPixel; 203} 204 205 206 207/* 208 * Determine if a given X window ID is valid (window exists). 209 * Do this by calling XGetWindowAttributes() for the window and 210 * checking if we catch an X error. 211 * Input: dpy - the display 212 * win - the window to check for existance 213 * Return: GL_TRUE - window exists 214 * GL_FALSE - window doesn't exist 215 */ 216static GLboolean WindowExistsFlag; 217 218static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr ) 219{ 220 (void) dpy; 221 if (xerr->error_code == BadWindow) { 222 WindowExistsFlag = GL_FALSE; 223 } 224 return 0; 225} 226 227static GLboolean window_exists( Display *dpy, Window win ) 228{ 229 XWindowAttributes wa; 230 int (*old_handler)( Display*, XErrorEvent* ); 231 WindowExistsFlag = GL_TRUE; 232 old_handler = XSetErrorHandler(window_exists_err_handler); 233 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 234 XSetErrorHandler(old_handler); 235 return WindowExistsFlag; 236} 237 238static Status 239get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height ) 240{ 241 Window root; 242 Status stat; 243 int xpos, ypos; 244 unsigned int w, h, bw, depth; 245 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 246 *width = w; 247 *height = h; 248 return stat; 249} 250 251 252/** 253 * Return the size of the window (or pixmap) that corresponds to the 254 * given XMesaBuffer. 255 * \param width returns width in pixels 256 * \param height returns height in pixels 257 */ 258void 259xmesa_get_window_size(Display *dpy, XMesaBuffer b, 260 GLuint *width, GLuint *height) 261{ 262 XMesaDisplay xmdpy = xmesa_init_display(dpy); 263 Status stat; 264 265 pipe_mutex_lock(xmdpy->mutex); 266 XSync(b->xm_visual->display, 0); /* added for Chromium */ 267 stat = get_drawable_size(dpy, b->ws.drawable, width, height); 268 pipe_mutex_unlock(xmdpy->mutex); 269 270 if (!stat) { 271 /* probably querying a window that's recently been destroyed */ 272 _mesa_warning(NULL, "XGetGeometry failed!\n"); 273 *width = *height = 1; 274 } 275} 276 277#define GET_REDMASK(__v) __v->mesa_visual.redMask 278#define GET_GREENMASK(__v) __v->mesa_visual.greenMask 279#define GET_BLUEMASK(__v) __v->mesa_visual.blueMask 280 281 282/** 283 * Choose the pixel format for the given visual. 284 * This will tell the gallium driver how to pack pixel data into 285 * drawing surfaces. 286 */ 287static GLuint 288choose_pixel_format(XMesaVisual v) 289{ 290 boolean native_byte_order = (host_byte_order() == 291 ImageByteOrder(v->display)); 292 293 if ( GET_REDMASK(v) == 0x0000ff 294 && GET_GREENMASK(v) == 0x00ff00 295 && GET_BLUEMASK(v) == 0xff0000 296 && v->BitsPerPixel == 32) { 297 if (native_byte_order) { 298 /* no byteswapping needed */ 299 return PIPE_FORMAT_R8G8B8A8_UNORM; 300 } 301 else { 302 return PIPE_FORMAT_A8B8G8R8_UNORM; 303 } 304 } 305 else if ( GET_REDMASK(v) == 0xff0000 306 && GET_GREENMASK(v) == 0x00ff00 307 && GET_BLUEMASK(v) == 0x0000ff 308 && v->BitsPerPixel == 32) { 309 if (native_byte_order) { 310 /* no byteswapping needed */ 311 return PIPE_FORMAT_B8G8R8A8_UNORM; 312 } 313 else { 314 return PIPE_FORMAT_A8R8G8B8_UNORM; 315 } 316 } 317 else if ( GET_REDMASK(v) == 0x0000ff00 318 && GET_GREENMASK(v) == 0x00ff0000 319 && GET_BLUEMASK(v) == 0xff000000 320 && v->BitsPerPixel == 32) { 321 if (native_byte_order) { 322 /* no byteswapping needed */ 323 return PIPE_FORMAT_A8R8G8B8_UNORM; 324 } 325 else { 326 return PIPE_FORMAT_B8G8R8A8_UNORM; 327 } 328 } 329 else if ( GET_REDMASK(v) == 0xf800 330 && GET_GREENMASK(v) == 0x07e0 331 && GET_BLUEMASK(v) == 0x001f 332 && native_byte_order 333 && v->BitsPerPixel == 16) { 334 /* 5-6-5 RGB */ 335 return PIPE_FORMAT_B5G6R5_UNORM; 336 } 337 338 return PIPE_FORMAT_NONE; 339} 340 341 342/** 343 * Choose a depth/stencil format that satisfies the given depth and 344 * stencil sizes. 345 */ 346static enum pipe_format 347choose_depth_stencil_format(XMesaDisplay xmdpy, int depth, int stencil) 348{ 349 const enum pipe_texture_target target = PIPE_TEXTURE_2D; 350 const unsigned tex_usage = PIPE_BIND_DEPTH_STENCIL; 351 const unsigned geom_flags = (PIPE_TEXTURE_GEOM_NON_SQUARE | 352 PIPE_TEXTURE_GEOM_NON_POWER_OF_TWO); 353 const unsigned sample_count = 0; 354 enum pipe_format formats[8], fmt; 355 int count, i; 356 357 count = 0; 358 359 if (depth <= 16 && stencil == 0) { 360 formats[count++] = PIPE_FORMAT_Z16_UNORM; 361 } 362 if (depth <= 24 && stencil == 0) { 363 formats[count++] = PIPE_FORMAT_X8Z24_UNORM; 364 formats[count++] = PIPE_FORMAT_Z24X8_UNORM; 365 } 366 if (depth <= 24 && stencil <= 8) { 367 formats[count++] = PIPE_FORMAT_S8_USCALED_Z24_UNORM; 368 formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_USCALED; 369 } 370 if (depth <= 32 && stencil == 0) { 371 formats[count++] = PIPE_FORMAT_Z32_UNORM; 372 } 373 374 fmt = PIPE_FORMAT_NONE; 375 for (i = 0; i < count; i++) { 376 if (xmdpy->screen->is_format_supported(xmdpy->screen, formats[i], 377 target, sample_count, 378 tex_usage, geom_flags)) { 379 fmt = formats[i]; 380 break; 381 } 382 } 383 384 return fmt; 385} 386 387 388 389/**********************************************************************/ 390/***** Linked list of XMesaBuffers *****/ 391/**********************************************************************/ 392 393static XMesaBuffer XMesaBufferList = NULL; 394 395 396/** 397 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 398 * Note that XMesaBuffer is derived from GLframebuffer. 399 * The new XMesaBuffer will not have any size (Width=Height=0). 400 * 401 * \param d the corresponding X drawable (window or pixmap) 402 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 403 * \param vis the buffer's visual 404 * \param cmap the window's colormap, if known. 405 * \return new XMesaBuffer or NULL if any problem 406 */ 407static XMesaBuffer 408create_xmesa_buffer(Drawable d, BufferType type, 409 XMesaVisual vis, Colormap cmap) 410{ 411 XMesaDisplay xmdpy = xmesa_init_display(vis->display); 412 XMesaBuffer b; 413 uint width, height; 414 415 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 416 417 if (!xmdpy) 418 return NULL; 419 420 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 421 if (!b) 422 return NULL; 423 424 b->ws.drawable = d; 425 b->ws.visual = vis->visinfo->visual; 426 b->ws.depth = vis->visinfo->depth; 427 428 b->xm_visual = vis; 429 b->type = type; 430 b->cmap = cmap; 431 432 get_drawable_size(vis->display, d, &width, &height); 433 434 /* 435 * Create framebuffer, but we'll plug in our own renderbuffers below. 436 */ 437 b->stfb = xmesa_create_st_framebuffer(xmdpy, b); 438 439 /* GLX_EXT_texture_from_pixmap */ 440 b->TextureTarget = 0; 441 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 442 b->TextureMipmap = 0; 443 444 /* insert buffer into linked list */ 445 b->Next = XMesaBufferList; 446 XMesaBufferList = b; 447 448 return b; 449} 450 451 452/** 453 * Find an XMesaBuffer by matching X display and colormap but NOT matching 454 * the notThis buffer. 455 */ 456XMesaBuffer 457xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis) 458{ 459 XMesaBuffer b; 460 for (b = XMesaBufferList; b; b = b->Next) { 461 if (b->xm_visual->display == dpy && 462 b->cmap == cmap && 463 b != notThis) { 464 return b; 465 } 466 } 467 return NULL; 468} 469 470 471/** 472 * Remove buffer from linked list, delete if no longer referenced. 473 */ 474static void 475xmesa_free_buffer(XMesaBuffer buffer) 476{ 477 XMesaBuffer prev = NULL, b; 478 479 for (b = XMesaBufferList; b; b = b->Next) { 480 if (b == buffer) { 481 /* unlink buffer from list */ 482 if (prev) 483 prev->Next = buffer->Next; 484 else 485 XMesaBufferList = buffer->Next; 486 487 /* Since the X window for the XMesaBuffer is going away, we don't 488 * want to dereference this pointer in the future. 489 */ 490 b->ws.drawable = 0; 491 492 /* XXX we should move the buffer to a delete-pending list and destroy 493 * the buffer until it is no longer current. 494 */ 495 xmesa_destroy_st_framebuffer(buffer->stfb); 496 497 free(buffer); 498 499 return; 500 } 501 /* continue search */ 502 prev = b; 503 } 504 /* buffer not found in XMesaBufferList */ 505 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 506} 507 508 509 510/**********************************************************************/ 511/***** Misc Private Functions *****/ 512/**********************************************************************/ 513 514 515/** 516 * When a context is bound for the first time, we can finally finish 517 * initializing the context's visual and buffer information. 518 * \param v the XMesaVisual to initialize 519 * \param b the XMesaBuffer to initialize (may be NULL) 520 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 521 * \param window the window/pixmap we're rendering into 522 * \param cmap the colormap associated with the window/pixmap 523 * \return GL_TRUE=success, GL_FALSE=failure 524 */ 525static GLboolean 526initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 527 GLboolean rgb_flag, Drawable window, 528 Colormap cmap) 529{ 530 ASSERT(!b || b->xm_visual == v); 531 532 /* Save true bits/pixel */ 533 v->BitsPerPixel = bits_per_pixel(v); 534 assert(v->BitsPerPixel > 0); 535 536 if (rgb_flag == GL_FALSE) { 537 /* COLOR-INDEXED WINDOW: not supported*/ 538 return GL_FALSE; 539 } 540 else { 541 /* RGB WINDOW: 542 * We support RGB rendering into almost any kind of visual. 543 */ 544 const int xclass = v->mesa_visual.visualType; 545 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) { 546 _mesa_warning(NULL, 547 "XMesa: RGB mode rendering not supported in given visual.\n"); 548 return GL_FALSE; 549 } 550 v->mesa_visual.indexBits = 0; 551 552 if (v->BitsPerPixel == 32) { 553 /* We use XImages for all front/back buffers. If an X Window or 554 * X Pixmap is 32bpp, there's no guarantee that the alpha channel 555 * will be preserved. For XImages we're in luck. 556 */ 557 v->mesa_visual.alphaBits = 8; 558 } 559 } 560 561 /* 562 * If MESA_INFO env var is set print out some debugging info 563 * which can help Brian figure out what's going on when a user 564 * reports bugs. 565 */ 566 if (_mesa_getenv("MESA_INFO")) { 567 printf("X/Mesa visual = %p\n", (void *) v); 568 printf("X/Mesa level = %d\n", v->mesa_visual.level); 569 printf("X/Mesa depth = %d\n", v->visinfo->depth); 570 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 571 } 572 573 return GL_TRUE; 574} 575 576 577 578#define NUM_VISUAL_TYPES 6 579 580/** 581 * Convert an X visual type to a GLX visual type. 582 * 583 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 584 * to be converted. 585 * \return If \c visualType is a valid X visual type, a GLX visual type will 586 * be returned. Otherwise \c GLX_NONE will be returned. 587 * 588 * \note 589 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 590 * DRI CVS tree. 591 */ 592static GLint 593xmesa_convert_from_x_visual_type( int visualType ) 594{ 595 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 596 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 597 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 598 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 599 }; 600 601 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 602 ? glx_visual_types[ visualType ] : GLX_NONE; 603} 604 605 606/**********************************************************************/ 607/***** Public Functions *****/ 608/**********************************************************************/ 609 610 611/* 612 * Create a new X/Mesa visual. 613 * Input: display - X11 display 614 * visinfo - an XVisualInfo pointer 615 * rgb_flag - GL_TRUE = RGB mode, 616 * GL_FALSE = color index mode 617 * alpha_flag - alpha buffer requested? 618 * db_flag - GL_TRUE = double-buffered, 619 * GL_FALSE = single buffered 620 * stereo_flag - stereo visual? 621 * ximage_flag - GL_TRUE = use an XImage for back buffer, 622 * GL_FALSE = use an off-screen pixmap for back buffer 623 * depth_size - requested bits/depth values, or zero 624 * stencil_size - requested bits/stencil values, or zero 625 * accum_red_size - requested bits/red accum values, or zero 626 * accum_green_size - requested bits/green accum values, or zero 627 * accum_blue_size - requested bits/blue accum values, or zero 628 * accum_alpha_size - requested bits/alpha accum values, or zero 629 * num_samples - number of samples/pixel if multisampling, or zero 630 * level - visual level, usually 0 631 * visualCaveat - ala the GLX extension, usually GLX_NONE 632 * Return; a new XMesaVisual or 0 if error. 633 */ 634PUBLIC 635XMesaVisual XMesaCreateVisual( Display *display, 636 XVisualInfo * visinfo, 637 GLboolean rgb_flag, 638 GLboolean alpha_flag, 639 GLboolean db_flag, 640 GLboolean stereo_flag, 641 GLboolean ximage_flag, 642 GLint depth_size, 643 GLint stencil_size, 644 GLint accum_red_size, 645 GLint accum_green_size, 646 GLint accum_blue_size, 647 GLint accum_alpha_size, 648 GLint num_samples, 649 GLint level, 650 GLint visualCaveat ) 651{ 652 XMesaDisplay xmdpy = xmesa_init_display(display); 653 XMesaVisual v; 654 GLint red_bits, green_bits, blue_bits, alpha_bits; 655 656 if (!xmdpy) 657 return NULL; 658 659 /* For debugging only */ 660 if (_mesa_getenv("MESA_XSYNC")) { 661 /* This makes debugging X easier. 662 * In your debugger, set a breakpoint on _XError to stop when an 663 * X protocol error is generated. 664 */ 665 XSynchronize( display, 1 ); 666 } 667 668 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 669 if (!v) { 670 return NULL; 671 } 672 673 v->display = display; 674 675 /* Save a copy of the XVisualInfo struct because the user may Xfree() 676 * the struct but we may need some of the information contained in it 677 * at a later time. 678 */ 679 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 680 if (!v->visinfo) { 681 free(v); 682 return NULL; 683 } 684 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 685 686 v->ximage_flag = ximage_flag; 687 688 v->mesa_visual.redMask = visinfo->red_mask; 689 v->mesa_visual.greenMask = visinfo->green_mask; 690 v->mesa_visual.blueMask = visinfo->blue_mask; 691 v->mesa_visual.visualID = visinfo->visualid; 692 v->mesa_visual.screen = visinfo->screen; 693 694#if !(defined(__cplusplus) || defined(c_plusplus)) 695 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 696#else 697 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 698#endif 699 700 v->mesa_visual.visualRating = visualCaveat; 701 702 if (alpha_flag) 703 v->mesa_visual.alphaBits = 8; 704 705 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 706 707 { 708 const int xclass = v->mesa_visual.visualType; 709 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 710 red_bits = _mesa_bitcount(GET_REDMASK(v)); 711 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 712 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 713 } 714 else { 715 /* this is an approximation */ 716 int depth; 717 depth = v->visinfo->depth; 718 red_bits = depth / 3; 719 depth -= red_bits; 720 green_bits = depth / 2; 721 depth -= green_bits; 722 blue_bits = depth; 723 alpha_bits = 0; 724 assert( red_bits + green_bits + blue_bits == v->visinfo->depth ); 725 } 726 alpha_bits = v->mesa_visual.alphaBits; 727 } 728 729 _mesa_initialize_visual( &v->mesa_visual, 730 db_flag, stereo_flag, 731 red_bits, green_bits, 732 blue_bits, alpha_bits, 733 depth_size, 734 stencil_size, 735 accum_red_size, accum_green_size, 736 accum_blue_size, accum_alpha_size, 737 0 ); 738 739 v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK; 740 if (db_flag) 741 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK; 742 if (stereo_flag) { 743 v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK; 744 if (db_flag) 745 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK; 746 } 747 748 v->stvis.color_format = choose_pixel_format(v); 749 if (v->stvis.color_format == PIPE_FORMAT_NONE) { 750 FREE(v->visinfo); 751 FREE(v); 752 return NULL; 753 } 754 755 v->stvis.depth_stencil_format = 756 choose_depth_stencil_format(xmdpy, depth_size, stencil_size); 757 758 v->stvis.accum_format = (accum_red_size + 759 accum_green_size + accum_blue_size + accum_alpha_size) ? 760 PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE; 761 762 v->stvis.samples = num_samples; 763 v->stvis.render_buffer = ST_ATTACHMENT_INVALID; 764 765 /* XXX minor hack */ 766 v->mesa_visual.level = level; 767 return v; 768} 769 770 771PUBLIC 772void XMesaDestroyVisual( XMesaVisual v ) 773{ 774 free(v->visinfo); 775 free(v); 776} 777 778 779/** 780 * Do per-display initializations. 781 */ 782void 783xmesa_init( Display *display ) 784{ 785 xmesa_init_display(display); 786} 787 788 789/** 790 * Create a new XMesaContext. 791 * \param v the XMesaVisual 792 * \param share_list another XMesaContext with which to share display 793 * lists or NULL if no sharing is wanted. 794 * \return an XMesaContext or NULL if error. 795 */ 796PUBLIC 797XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 798{ 799 XMesaDisplay xmdpy = xmesa_init_display(v->display); 800 XMesaContext c; 801 802 if (!xmdpy) 803 return NULL; 804 805 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 806 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 807 if (!c) 808 return NULL; 809 810 c->xm_visual = v; 811 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 812 c->xm_read_buffer = NULL; 813 814 c->st = stapi->create_context(stapi, xmdpy->smapi, 815 &v->stvis, (share_list) ? share_list->st : NULL); 816 if (c->st == NULL) 817 goto fail; 818 819 c->st->st_manager_private = (void *) c; 820 821 return c; 822 823fail: 824 if (c->st) 825 c->st->destroy(c->st); 826 827 free(c); 828 return NULL; 829} 830 831 832 833PUBLIC 834void XMesaDestroyContext( XMesaContext c ) 835{ 836 c->st->destroy(c->st); 837 838 /* FIXME: We should destroy the screen here, but if we do so, surfaces may 839 * outlive it, causing segfaults 840 struct pipe_screen *screen = c->st->pipe->screen; 841 screen->destroy(screen); 842 */ 843 844 free(c); 845} 846 847 848 849/** 850 * Private function for creating an XMesaBuffer which corresponds to an 851 * X window or pixmap. 852 * \param v the window's XMesaVisual 853 * \param w the window we're wrapping 854 * \return new XMesaBuffer or NULL if error 855 */ 856PUBLIC XMesaBuffer 857XMesaCreateWindowBuffer(XMesaVisual v, Window w) 858{ 859 XWindowAttributes attr; 860 XMesaBuffer b; 861 Colormap cmap; 862 int depth; 863 864 assert(v); 865 assert(w); 866 867 /* Check that window depth matches visual depth */ 868 XGetWindowAttributes( v->display, w, &attr ); 869 depth = attr.depth; 870 if (v->visinfo->depth != depth) { 871 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 872 v->visinfo->depth, depth); 873 return NULL; 874 } 875 876 /* Find colormap */ 877 if (attr.colormap) { 878 cmap = attr.colormap; 879 } 880 else { 881 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 882 /* this is weird, a window w/out a colormap!? */ 883 /* OK, let's just allocate a new one and hope for the best */ 884 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 885 } 886 887 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap); 888 if (!b) 889 return NULL; 890 891 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 892 (Drawable) w, cmap )) { 893 xmesa_free_buffer(b); 894 return NULL; 895 } 896 897 return b; 898} 899 900 901 902/** 903 * Create a new XMesaBuffer from an X pixmap. 904 * 905 * \param v the XMesaVisual 906 * \param p the pixmap 907 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 908 * \c GLX_DIRECT_COLOR visual for the pixmap 909 * \returns new XMesaBuffer or NULL if error 910 */ 911PUBLIC XMesaBuffer 912XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap) 913{ 914 XMesaBuffer b; 915 916 assert(v); 917 918 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 919 if (!b) 920 return NULL; 921 922 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 923 (Drawable) p, cmap)) { 924 xmesa_free_buffer(b); 925 return NULL; 926 } 927 928 return b; 929} 930 931 932/** 933 * For GLX_EXT_texture_from_pixmap 934 */ 935XMesaBuffer 936XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p, 937 Colormap cmap, 938 int format, int target, int mipmap) 939{ 940 GET_CURRENT_CONTEXT(ctx); 941 XMesaBuffer b; 942 943 assert(v); 944 945 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap); 946 if (!b) 947 return NULL; 948 949 /* get pixmap size */ 950 xmesa_get_window_size(v->display, b, &b->width, &b->height); 951 952 if (target == 0) { 953 /* examine dims */ 954 if (ctx->Extensions.ARB_texture_non_power_of_two) { 955 target = GLX_TEXTURE_2D_EXT; 956 } 957 else if ( _mesa_bitcount(b->width) == 1 958 && _mesa_bitcount(b->height) == 1) { 959 /* power of two size */ 960 if (b->height == 1) { 961 target = GLX_TEXTURE_1D_EXT; 962 } 963 else { 964 target = GLX_TEXTURE_2D_EXT; 965 } 966 } 967 else if (ctx->Extensions.NV_texture_rectangle) { 968 target = GLX_TEXTURE_RECTANGLE_EXT; 969 } 970 else { 971 /* non power of two textures not supported */ 972 XMesaDestroyBuffer(b); 973 return 0; 974 } 975 } 976 977 b->TextureTarget = target; 978 b->TextureFormat = format; 979 b->TextureMipmap = mipmap; 980 981 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 982 (Drawable) p, cmap)) { 983 xmesa_free_buffer(b); 984 return NULL; 985 } 986 987 return b; 988} 989 990 991 992XMesaBuffer 993XMesaCreatePBuffer(XMesaVisual v, Colormap cmap, 994 unsigned int width, unsigned int height) 995{ 996 Window root; 997 Drawable drawable; /* X Pixmap Drawable */ 998 XMesaBuffer b; 999 1000 /* allocate pixmap for front buffer */ 1001 root = RootWindow( v->display, v->visinfo->screen ); 1002 drawable = XCreatePixmap(v->display, root, width, height, 1003 v->visinfo->depth); 1004 if (!drawable) 1005 return NULL; 1006 1007 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1008 if (!b) 1009 return NULL; 1010 1011 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1012 drawable, cmap)) { 1013 xmesa_free_buffer(b); 1014 return NULL; 1015 } 1016 1017 return b; 1018} 1019 1020 1021 1022/* 1023 * Deallocate an XMesaBuffer structure and all related info. 1024 */ 1025PUBLIC void 1026XMesaDestroyBuffer(XMesaBuffer b) 1027{ 1028 xmesa_free_buffer(b); 1029} 1030 1031 1032/** 1033 * Query the current drawable size and notify the binding context. 1034 */ 1035void 1036xmesa_check_buffer_size(XMesaBuffer b) 1037{ 1038 XMesaContext xmctx = XMesaGetCurrentContext(); 1039 1040 if (b->type == PBUFFER) 1041 return; 1042 1043 xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height); 1044 if (xmctx && xmctx->xm_buffer == b) 1045 xmctx->st->notify_invalid_framebuffer(xmctx->st, b->stfb); 1046} 1047 1048 1049/* 1050 * Bind buffer b to context c and make c the current rendering context. 1051 */ 1052PUBLIC 1053GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1054 XMesaBuffer readBuffer ) 1055{ 1056 XMesaContext old_ctx = XMesaGetCurrentContext(); 1057 1058 if (old_ctx && old_ctx != c) { 1059 XMesaFlush(old_ctx); 1060 old_ctx->xm_buffer = NULL; 1061 old_ctx->xm_read_buffer = NULL; 1062 } 1063 1064 if (c) { 1065 if (!drawBuffer || !readBuffer) 1066 return GL_FALSE; /* must specify buffers! */ 1067 1068 if (c == old_ctx && 1069 c->xm_buffer == drawBuffer && 1070 c->xm_read_buffer == readBuffer) 1071 return GL_TRUE; 1072 1073 xmesa_check_buffer_size(drawBuffer); 1074 if (readBuffer != drawBuffer) 1075 xmesa_check_buffer_size(readBuffer); 1076 1077 c->xm_buffer = drawBuffer; 1078 c->xm_read_buffer = readBuffer; 1079 1080 stapi->make_current(stapi, c->st, drawBuffer->stfb, readBuffer->stfb); 1081 1082 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1083 drawBuffer->wasCurrent = GL_TRUE; 1084 } 1085 else { 1086 /* Detach */ 1087 stapi->make_current(stapi, NULL, NULL, NULL); 1088 1089 } 1090 return GL_TRUE; 1091} 1092 1093 1094/* 1095 * Unbind the context c from its buffer. 1096 */ 1097GLboolean XMesaUnbindContext( XMesaContext c ) 1098{ 1099 /* A no-op for XFree86 integration purposes */ 1100 return GL_TRUE; 1101} 1102 1103 1104XMesaContext XMesaGetCurrentContext( void ) 1105{ 1106 struct st_context_iface *st = stapi->get_current(stapi); 1107 return (XMesaContext) (st) ? st->st_manager_private : NULL; 1108} 1109 1110 1111 1112/** 1113 * Swap front and back color buffers and have winsys display front buffer. 1114 * If there's no front color buffer no swap actually occurs. 1115 */ 1116PUBLIC 1117void XMesaSwapBuffers( XMesaBuffer b ) 1118{ 1119 XMesaContext xmctx = XMesaGetCurrentContext(); 1120 1121 if (xmctx && xmctx->xm_buffer == b) { 1122 xmctx->st->flush( xmctx->st, 1123 PIPE_FLUSH_RENDER_CACHE | 1124 PIPE_FLUSH_SWAPBUFFERS | 1125 PIPE_FLUSH_FRAME, 1126 NULL); 1127 } 1128 1129 xmesa_swap_st_framebuffer(b->stfb); 1130} 1131 1132 1133 1134/* 1135 * Copy sub-region of back buffer to front buffer 1136 */ 1137void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1138{ 1139 xmesa_copy_st_framebuffer(b->stfb, 1140 ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT, 1141 x, y, width, height); 1142} 1143 1144 1145 1146void XMesaFlush( XMesaContext c ) 1147{ 1148 if (c && c->xm_visual->display) { 1149 XMesaDisplay xmdpy = xmesa_init_display(c->xm_visual->display); 1150 struct pipe_fence_handle *fence = NULL; 1151 1152 c->st->flush(c->st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence); 1153 if (fence) { 1154 xmdpy->screen->fence_finish(xmdpy->screen, fence, 0); 1155 xmdpy->screen->fence_reference(xmdpy->screen, &fence, NULL); 1156 } 1157 XSync( c->xm_visual->display, False ); 1158 } 1159} 1160 1161 1162 1163 1164 1165XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d ) 1166{ 1167 XMesaBuffer b; 1168 for (b = XMesaBufferList; b; b = b->Next) { 1169 if (b->ws.drawable == d && b->xm_visual->display == dpy) { 1170 return b; 1171 } 1172 } 1173 return NULL; 1174} 1175 1176 1177/** 1178 * Free/destroy all XMesaBuffers associated with given display. 1179 */ 1180void xmesa_destroy_buffers_on_display(Display *dpy) 1181{ 1182 XMesaBuffer b, next; 1183 for (b = XMesaBufferList; b; b = next) { 1184 next = b->Next; 1185 if (b->xm_visual->display == dpy) { 1186 xmesa_free_buffer(b); 1187 } 1188 } 1189} 1190 1191 1192/* 1193 * Look for XMesaBuffers whose X window has been destroyed. 1194 * Deallocate any such XMesaBuffers. 1195 */ 1196void XMesaGarbageCollect( void ) 1197{ 1198 XMesaBuffer b, next; 1199 for (b=XMesaBufferList; b; b=next) { 1200 next = b->Next; 1201 if (b->xm_visual && 1202 b->xm_visual->display && 1203 b->ws.drawable && 1204 b->type == WINDOW) { 1205 XSync(b->xm_visual->display, False); 1206 if (!window_exists( b->xm_visual->display, b->ws.drawable )) { 1207 /* found a dead window, free the ancillary info */ 1208 XMesaDestroyBuffer( b ); 1209 } 1210 } 1211 } 1212} 1213 1214 1215 1216 1217PUBLIC void 1218XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer, 1219 const int *attrib_list) 1220{ 1221} 1222 1223 1224 1225PUBLIC void 1226XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer) 1227{ 1228} 1229 1230 1231void 1232XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask) 1233{ 1234 if (dst->st->copy) 1235 dst->st->copy(dst->st, src->st, mask); 1236} 1237