xm_api.c revision d16e71eeb47d1e67930f6e86a80dc926468224d9
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 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 39 * in support for the MIT Shared Memory extension. If enabled, when you 40 * use an Ximage for the back buffer in double buffered mode, the "swap" 41 * operation will be faster. You must also link with -lXext. 42 * 43 * Byte swapping: If the Mesa host and the X display use a different 44 * byte order then there's some trickiness to be aware of when using 45 * XImages. The byte ordering used for the XImage is that of the X 46 * display, not the Mesa host. 47 * The color-to-pixel encoding for True/DirectColor must be done 48 * according to the display's visual red_mask, green_mask, and blue_mask. 49 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 50 * do byte swapping if needed. If one wants to directly "poke" the pixel 51 * into the XImage's buffer then the pixel must be byte swapped first. In 52 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 53 * and use XPutPixel everywhere except in the implementation of 54 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 55 * instead of using XPutPixel we "poke" our values after byte-swapping 56 * the clear pixel value if needed. 57 * 58 */ 59 60#ifdef __CYGWIN__ 61#undef WIN32 62#undef __WIN32__ 63#endif 64 65#include "glxheader.h" 66#include "xmesaP.h" 67#include "main/context.h" 68#include "main/extensions.h" 69#include "main/framebuffer.h" 70#include "main/imports.h" 71#include "main/macros.h" 72#include "main/renderbuffer.h" 73#include "main/teximage.h" 74#include "glapi/glthread.h" 75#include "swrast/swrast.h" 76#include "swrast/s_renderbuffer.h" 77#include "swrast_setup/swrast_setup.h" 78#include "vbo/vbo.h" 79#include "tnl/tnl.h" 80#include "tnl/t_context.h" 81#include "tnl/t_pipeline.h" 82#include "drivers/common/driverfuncs.h" 83#include "drivers/common/meta.h" 84 85/** 86 * Global X driver lock 87 */ 88_glthread_Mutex _xmesa_lock; 89 90 91 92/**********************************************************************/ 93/***** X Utility Functions *****/ 94/**********************************************************************/ 95 96 97/** 98 * Return the host's byte order as LSBFirst or MSBFirst ala X. 99 */ 100static int host_byte_order( void ) 101{ 102 int i = 1; 103 char *cptr = (char *) &i; 104 return (*cptr==1) ? LSBFirst : MSBFirst; 105} 106 107 108/** 109 * Check if the X Shared Memory extension is available. 110 * Return: 0 = not available 111 * 1 = shared XImage support available 112 * 2 = shared Pixmap support available also 113 */ 114static int check_for_xshm( XMesaDisplay *display ) 115{ 116#if defined(USE_XSHM) 117 int ignore; 118 119 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 120 /* Note: we're no longer calling XShmQueryVersion() here. It seems 121 * to be flakey (triggers a spurious X protocol error when we close 122 * one display connection and start using a new one. XShm has been 123 * around a long time and hasn't changed so if MIT_SHM is supported 124 * we assume we're good to go. 125 */ 126 return 2; 127 } 128 else { 129 return 0; 130 } 131#else 132 /* No XSHM support */ 133 return 0; 134#endif 135} 136 137 138/** 139 * Apply gamma correction to an intensity value in [0..max]. Return the 140 * new intensity value. 141 */ 142static GLint 143gamma_adjust( GLfloat gamma, GLint value, GLint max ) 144{ 145 if (gamma == 1.0) { 146 return value; 147 } 148 else { 149 double x = (double) value / (double) max; 150 return IROUND_POS((GLfloat) max * pow(x, 1.0F/gamma)); 151 } 152} 153 154 155 156/** 157 * Return the true number of bits per pixel for XImages. 158 * For example, if we request a 24-bit deep visual we may actually need/get 159 * 32bpp XImages. This function returns the appropriate bpp. 160 * Input: dpy - the X display 161 * visinfo - desribes the visual to be used for XImages 162 * Return: true number of bits per pixel for XImages 163 */ 164static int 165bits_per_pixel( XMesaVisual xmv ) 166{ 167 XMesaDisplay *dpy = xmv->display; 168 XMesaVisualInfo visinfo = xmv->visinfo; 169 XMesaImage *img; 170 int bitsPerPixel; 171 /* Create a temporary XImage */ 172 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 173 ZPixmap, 0, /*format, offset*/ 174 (char*) MALLOC(8), /*data*/ 175 1, 1, /*width, height*/ 176 32, /*bitmap_pad*/ 177 0 /*bytes_per_line*/ 178 ); 179 assert(img); 180 /* grab the bits/pixel value */ 181 bitsPerPixel = img->bits_per_pixel; 182 /* free the XImage */ 183 free( img->data ); 184 img->data = NULL; 185 XMesaDestroyImage( img ); 186 return bitsPerPixel; 187} 188 189 190 191/* 192 * Determine if a given X window ID is valid (window exists). 193 * Do this by calling XGetWindowAttributes() for the window and 194 * checking if we catch an X error. 195 * Input: dpy - the display 196 * win - the window to check for existance 197 * Return: GL_TRUE - window exists 198 * GL_FALSE - window doesn't exist 199 */ 200static GLboolean WindowExistsFlag; 201 202static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 203{ 204 (void) dpy; 205 if (xerr->error_code == BadWindow) { 206 WindowExistsFlag = GL_FALSE; 207 } 208 return 0; 209} 210 211static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 212{ 213 XWindowAttributes wa; 214 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 215 WindowExistsFlag = GL_TRUE; 216 old_handler = XSetErrorHandler(window_exists_err_handler); 217 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 218 XSetErrorHandler(old_handler); 219 return WindowExistsFlag; 220} 221 222static Status 223get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height ) 224{ 225 Window root; 226 Status stat; 227 int xpos, ypos; 228 unsigned int w, h, bw, depth; 229 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 230 *width = w; 231 *height = h; 232 return stat; 233} 234 235 236/** 237 * Return the size of the window (or pixmap) that corresponds to the 238 * given XMesaBuffer. 239 * \param width returns width in pixels 240 * \param height returns height in pixels 241 */ 242void 243xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, 244 GLuint *width, GLuint *height) 245{ 246 Status stat; 247 248 _glthread_LOCK_MUTEX(_xmesa_lock); 249 XSync(b->xm_visual->display, 0); /* added for Chromium */ 250 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height); 251 _glthread_UNLOCK_MUTEX(_xmesa_lock); 252 253 if (!stat) { 254 /* probably querying a window that's recently been destroyed */ 255 _mesa_warning(NULL, "XGetGeometry failed!\n"); 256 *width = *height = 1; 257 } 258} 259 260 261 262/**********************************************************************/ 263/***** Linked list of XMesaBuffers *****/ 264/**********************************************************************/ 265 266XMesaBuffer XMesaBufferList = NULL; 267 268 269/** 270 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 271 * Note that XMesaBuffer is derived from struct gl_framebuffer. 272 * The new XMesaBuffer will not have any size (Width=Height=0). 273 * 274 * \param d the corresponding X drawable (window or pixmap) 275 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 276 * \param vis the buffer's visual 277 * \param cmap the window's colormap, if known. 278 * \return new XMesaBuffer or NULL if any problem 279 */ 280static XMesaBuffer 281create_xmesa_buffer(XMesaDrawable d, BufferType type, 282 XMesaVisual vis, XMesaColormap cmap) 283{ 284 XMesaBuffer b; 285 286 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 287 288 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 289 if (!b) 290 return NULL; 291 292 b->display = vis->display; 293 b->xm_visual = vis; 294 b->type = type; 295 b->cmap = cmap; 296 297 _mesa_initialize_window_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 298 b->mesa_buffer.Delete = xmesa_delete_framebuffer; 299 300 /* 301 * Front renderbuffer 302 */ 303 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_FALSE); 304 if (!b->frontxrb) { 305 free(b); 306 return NULL; 307 } 308 b->frontxrb->Parent = b; 309 b->frontxrb->drawable = d; 310 b->frontxrb->pixmap = (XMesaPixmap) d; 311 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 312 &b->frontxrb->Base.Base); 313 314 /* 315 * Back renderbuffer 316 */ 317 if (vis->mesa_visual.doubleBufferMode) { 318 b->backxrb = xmesa_new_renderbuffer(NULL, 0, vis, GL_TRUE); 319 if (!b->backxrb) { 320 /* XXX free front xrb too */ 321 free(b); 322 return NULL; 323 } 324 b->backxrb->Parent = b; 325 /* determine back buffer implementation */ 326 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 327 328 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 329 &b->backxrb->Base.Base); 330 } 331 332 /* 333 * Other renderbuffer (depth, stencil, etc) 334 */ 335 _swrast_add_soft_renderbuffers(&b->mesa_buffer, 336 GL_FALSE, /* color */ 337 vis->mesa_visual.haveDepthBuffer, 338 vis->mesa_visual.haveStencilBuffer, 339 vis->mesa_visual.haveAccumBuffer, 340 GL_FALSE, /* software alpha buffer */ 341 vis->mesa_visual.numAuxBuffers > 0 ); 342 343 /* GLX_EXT_texture_from_pixmap */ 344 b->TextureTarget = 0; 345 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 346 b->TextureMipmap = 0; 347 348 /* insert buffer into linked list */ 349 b->Next = XMesaBufferList; 350 XMesaBufferList = b; 351 352 return b; 353} 354 355 356/** 357 * Find an XMesaBuffer by matching X display and colormap but NOT matching 358 * the notThis buffer. 359 */ 360XMesaBuffer 361xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis) 362{ 363 XMesaBuffer b; 364 for (b=XMesaBufferList; b; b=b->Next) { 365 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 366 return b; 367 } 368 } 369 return NULL; 370} 371 372 373/** 374 * Remove buffer from linked list, delete if no longer referenced. 375 */ 376static void 377xmesa_free_buffer(XMesaBuffer buffer) 378{ 379 XMesaBuffer prev = NULL, b; 380 381 for (b = XMesaBufferList; b; b = b->Next) { 382 if (b == buffer) { 383 struct gl_framebuffer *fb = &buffer->mesa_buffer; 384 385 /* unlink buffer from list */ 386 if (prev) 387 prev->Next = buffer->Next; 388 else 389 XMesaBufferList = buffer->Next; 390 391 /* mark as delete pending */ 392 fb->DeletePending = GL_TRUE; 393 394 /* Since the X window for the XMesaBuffer is going away, we don't 395 * want to dereference this pointer in the future. 396 */ 397 b->frontxrb->drawable = 0; 398 399 /* Unreference. If count = zero we'll really delete the buffer */ 400 _mesa_reference_framebuffer(&fb, NULL); 401 402 return; 403 } 404 /* continue search */ 405 prev = b; 406 } 407 /* buffer not found in XMesaBufferList */ 408 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 409} 410 411 412 413 414/**********************************************************************/ 415/***** Misc Private Functions *****/ 416/**********************************************************************/ 417 418 419/** 420 * Setup RGB rendering for a window with a True/DirectColor visual. 421 */ 422static void 423setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) 424{ 425 unsigned long rmask, gmask, bmask; 426 (void) buffer; 427 (void) cmap; 428 429 /* Compute red multiplier (mask) and bit shift */ 430 v->rshift = 0; 431 rmask = GET_REDMASK(v); 432 while ((rmask & 1)==0) { 433 v->rshift++; 434 rmask = rmask >> 1; 435 } 436 437 /* Compute green multiplier (mask) and bit shift */ 438 v->gshift = 0; 439 gmask = GET_GREENMASK(v); 440 while ((gmask & 1)==0) { 441 v->gshift++; 442 gmask = gmask >> 1; 443 } 444 445 /* Compute blue multiplier (mask) and bit shift */ 446 v->bshift = 0; 447 bmask = GET_BLUEMASK(v); 448 while ((bmask & 1)==0) { 449 v->bshift++; 450 bmask = bmask >> 1; 451 } 452 453 /* 454 * Compute component-to-pixel lookup tables and dithering kernel 455 */ 456 { 457 static GLubyte kernel[16] = { 458 0*16, 8*16, 2*16, 10*16, 459 12*16, 4*16, 14*16, 6*16, 460 3*16, 11*16, 1*16, 9*16, 461 15*16, 7*16, 13*16, 5*16, 462 }; 463 GLint rBits = _mesa_bitcount(rmask); 464 GLint gBits = _mesa_bitcount(gmask); 465 GLint bBits = _mesa_bitcount(bmask); 466 GLint maxBits; 467 GLuint i; 468 469 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 470 for (i=0; i<=rmask; i++) 471 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 472 for (i=0; i<=gmask; i++) 473 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 474 for (i=0; i<=bmask; i++) 475 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 476 477 /* convert RGB values from [0,255] to pixel components */ 478 479 for (i=0;i<256;i++) { 480 GLint r = gamma_adjust(v->RedGamma, i, 255); 481 GLint g = gamma_adjust(v->GreenGamma, i, 255); 482 GLint b = gamma_adjust(v->BlueGamma, i, 255); 483 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 484 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 485 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 486 } 487 /* overflow protection */ 488 for (i=256;i<512;i++) { 489 v->RtoPixel[i] = v->RtoPixel[255]; 490 v->GtoPixel[i] = v->GtoPixel[255]; 491 v->BtoPixel[i] = v->BtoPixel[255]; 492 } 493 494 /* setup dithering kernel */ 495 maxBits = rBits; 496 if (gBits > maxBits) maxBits = gBits; 497 if (bBits > maxBits) maxBits = bBits; 498 for (i=0;i<16;i++) { 499 v->Kernel[i] = kernel[i] >> maxBits; 500 } 501 502 v->undithered_pf = PF_Truecolor; 503 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 504 } 505 506 /* 507 * Now check for TrueColor visuals which we can optimize. 508 */ 509 if ( GET_REDMASK(v) ==0x0000ff 510 && GET_GREENMASK(v)==0x00ff00 511 && GET_BLUEMASK(v) ==0xff0000 512 && CHECK_BYTE_ORDER(v) 513 && v->BitsPerPixel==32 514 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 515 /* common 32 bpp config used on SGI, Sun */ 516 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ 517 } 518 else if (GET_REDMASK(v) == 0xff0000 519 && GET_GREENMASK(v)== 0x00ff00 520 && GET_BLUEMASK(v) == 0x0000ff 521 && CHECK_BYTE_ORDER(v) 522 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ 523 if (v->BitsPerPixel==32) { 524 /* if 32 bpp, and visual indicates 8 bpp alpha channel */ 525 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) 526 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ 527 else 528 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ 529 } 530 else if (v->BitsPerPixel == 24) { 531 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ 532 } 533 } 534 else if (GET_REDMASK(v) ==0xf800 535 && GET_GREENMASK(v)==0x07e0 536 && GET_BLUEMASK(v) ==0x001f 537 && CHECK_BYTE_ORDER(v) 538 && v->BitsPerPixel==16 539 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 540 /* 5-6-5 RGB */ 541 v->undithered_pf = PF_5R6G5B; 542 v->dithered_pf = PF_Dither_5R6G5B; 543 } 544} 545 546 547/** 548 * When a context is bound for the first time, we can finally finish 549 * initializing the context's visual and buffer information. 550 * \param v the XMesaVisual to initialize 551 * \param b the XMesaBuffer to initialize (may be NULL) 552 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 553 * \param window the window/pixmap we're rendering into 554 * \param cmap the colormap associated with the window/pixmap 555 * \return GL_TRUE=success, GL_FALSE=failure 556 */ 557static GLboolean 558initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 559 XMesaDrawable window, 560 XMesaColormap cmap) 561{ 562 const int xclass = v->visualType; 563 564 565 ASSERT(!b || b->xm_visual == v); 566 567 /* Save true bits/pixel */ 568 v->BitsPerPixel = bits_per_pixel(v); 569 assert(v->BitsPerPixel > 0); 570 571 /* RGB WINDOW: 572 * We support RGB rendering into almost any kind of visual. 573 */ 574 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 575 setup_truecolor( v, b, cmap ); 576 } 577 else { 578 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 579 return GL_FALSE; 580 } 581 v->mesa_visual.indexBits = 0; 582 583 if (_mesa_getenv("MESA_NO_DITHER")) { 584 v->dithered_pf = v->undithered_pf; 585 } 586 587 588 /* 589 * If MESA_INFO env var is set print out some debugging info 590 * which can help Brian figure out what's going on when a user 591 * reports bugs. 592 */ 593 if (_mesa_getenv("MESA_INFO")) { 594 printf("X/Mesa visual = %p\n", (void *) v); 595 printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 596 printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 597 printf("X/Mesa level = %d\n", v->mesa_visual.level); 598 printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 599 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 600 } 601 602 if (b && window) { 603 /* Do window-specific initializations */ 604 605 /* these should have been set in create_xmesa_buffer */ 606 ASSERT(b->frontxrb->drawable == window); 607 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 608 609 /* Setup for single/double buffering */ 610 if (v->mesa_visual.doubleBufferMode) { 611 /* Double buffered */ 612 b->shm = check_for_xshm( v->display ); 613 } 614 615 /* X11 graphics contexts */ 616 b->gc = XCreateGC( v->display, window, 0, NULL ); 617 XMesaSetFunction( v->display, b->gc, GXcopy ); 618 619 /* cleargc - for glClear() */ 620 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 621 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 622 623 /* 624 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 625 * Patch contributed by Michael Pichler May 15, 1995. 626 */ 627 { 628 XGCValues gcvalues; 629 gcvalues.graphics_exposures = False; 630 b->swapgc = XCreateGC(v->display, window, 631 GCGraphicsExposures, &gcvalues); 632 } 633 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 634 } 635 636 return GL_TRUE; 637} 638 639 640 641/* 642 * Convert an RGBA color to a pixel value. 643 */ 644unsigned long 645xmesa_color_to_pixel(struct gl_context *ctx, 646 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 647 GLuint pixelFormat) 648{ 649 XMesaContext xmesa = XMESA_CONTEXT(ctx); 650 switch (pixelFormat) { 651 case PF_Truecolor: 652 { 653 unsigned long p; 654 PACK_TRUECOLOR( p, r, g, b ); 655 return p; 656 } 657 case PF_8A8B8G8R: 658 return PACK_8A8B8G8R( r, g, b, a ); 659 case PF_8A8R8G8B: 660 return PACK_8A8R8G8B( r, g, b, a ); 661 case PF_8R8G8B: 662 /* fall through */ 663 case PF_8R8G8B24: 664 return PACK_8R8G8B( r, g, b ); 665 case PF_5R6G5B: 666 return PACK_5R6G5B( r, g, b ); 667 case PF_Dither_True: 668 /* fall through */ 669 case PF_Dither_5R6G5B: 670 { 671 unsigned long p; 672 PACK_TRUEDITHER(p, 1, 0, r, g, b); 673 return p; 674 } 675 default: 676 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 677 } 678 return 0; 679} 680 681 682#define NUM_VISUAL_TYPES 6 683 684/** 685 * Convert an X visual type to a GLX visual type. 686 * 687 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 688 * to be converted. 689 * \return If \c visualType is a valid X visual type, a GLX visual type will 690 * be returned. Otherwise \c GLX_NONE will be returned. 691 * 692 * \note 693 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 694 * DRI CVS tree. 695 */ 696static GLint 697xmesa_convert_from_x_visual_type( int visualType ) 698{ 699 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 700 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 701 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 702 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 703 }; 704 705 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 706 ? glx_visual_types[ visualType ] : GLX_NONE; 707} 708 709 710/**********************************************************************/ 711/***** Public Functions *****/ 712/**********************************************************************/ 713 714 715/* 716 * Create a new X/Mesa visual. 717 * Input: display - X11 display 718 * visinfo - an XVisualInfo pointer 719 * rgb_flag - GL_TRUE = RGB mode, 720 * GL_FALSE = color index mode 721 * alpha_flag - alpha buffer requested? 722 * db_flag - GL_TRUE = double-buffered, 723 * GL_FALSE = single buffered 724 * stereo_flag - stereo visual? 725 * ximage_flag - GL_TRUE = use an XImage for back buffer, 726 * GL_FALSE = use an off-screen pixmap for back buffer 727 * depth_size - requested bits/depth values, or zero 728 * stencil_size - requested bits/stencil values, or zero 729 * accum_red_size - requested bits/red accum values, or zero 730 * accum_green_size - requested bits/green accum values, or zero 731 * accum_blue_size - requested bits/blue accum values, or zero 732 * accum_alpha_size - requested bits/alpha accum values, or zero 733 * num_samples - number of samples/pixel if multisampling, or zero 734 * level - visual level, usually 0 735 * visualCaveat - ala the GLX extension, usually GLX_NONE 736 * Return; a new XMesaVisual or 0 if error. 737 */ 738PUBLIC 739XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 740 XMesaVisualInfo visinfo, 741 GLboolean rgb_flag, 742 GLboolean alpha_flag, 743 GLboolean db_flag, 744 GLboolean stereo_flag, 745 GLboolean ximage_flag, 746 GLint depth_size, 747 GLint stencil_size, 748 GLint accum_red_size, 749 GLint accum_green_size, 750 GLint accum_blue_size, 751 GLint accum_alpha_size, 752 GLint num_samples, 753 GLint level, 754 GLint visualCaveat ) 755{ 756 char *gamma; 757 XMesaVisual v; 758 GLint red_bits, green_bits, blue_bits, alpha_bits; 759 760 /* For debugging only */ 761 if (_mesa_getenv("MESA_XSYNC")) { 762 /* This makes debugging X easier. 763 * In your debugger, set a breakpoint on _XError to stop when an 764 * X protocol error is generated. 765 */ 766 XSynchronize( display, 1 ); 767 } 768 769 /* Color-index rendering not supported. */ 770 if (!rgb_flag) 771 return NULL; 772 773 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 774 if (!v) { 775 return NULL; 776 } 777 778 v->display = display; 779 780 /* Save a copy of the XVisualInfo struct because the user may Xfree() 781 * the struct but we may need some of the information contained in it 782 * at a later time. 783 */ 784 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 785 if(!v->visinfo) { 786 free(v); 787 return NULL; 788 } 789 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 790 791 /* check for MESA_GAMMA environment variable */ 792 gamma = _mesa_getenv("MESA_GAMMA"); 793 if (gamma) { 794 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 795 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 796 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 797 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 798 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 799 } 800 else { 801 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 802 } 803 804 v->ximage_flag = ximage_flag; 805 806 v->mesa_visual.redMask = visinfo->red_mask; 807 v->mesa_visual.greenMask = visinfo->green_mask; 808 v->mesa_visual.blueMask = visinfo->blue_mask; 809 v->visualID = visinfo->visualid; 810 v->screen = visinfo->screen; 811 812#if !(defined(__cplusplus) || defined(c_plusplus)) 813 v->visualType = xmesa_convert_from_x_visual_type(visinfo->class); 814#else 815 v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 816#endif 817 818 v->mesa_visual.visualRating = visualCaveat; 819 820 if (alpha_flag) 821 v->mesa_visual.alphaBits = 8; 822 823 (void) initialize_visual_and_buffer( v, NULL, 0, 0 ); 824 825 { 826 const int xclass = v->visualType; 827 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 828 red_bits = _mesa_bitcount(GET_REDMASK(v)); 829 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 830 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 831 } 832 else { 833 /* this is an approximation */ 834 int depth; 835 depth = GET_VISUAL_DEPTH(v); 836 red_bits = depth / 3; 837 depth -= red_bits; 838 green_bits = depth / 2; 839 depth -= green_bits; 840 blue_bits = depth; 841 alpha_bits = 0; 842 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 843 } 844 alpha_bits = v->mesa_visual.alphaBits; 845 } 846 847 _mesa_initialize_visual( &v->mesa_visual, 848 db_flag, stereo_flag, 849 red_bits, green_bits, 850 blue_bits, alpha_bits, 851 depth_size, 852 stencil_size, 853 accum_red_size, accum_green_size, 854 accum_blue_size, accum_alpha_size, 855 0 ); 856 857 /* XXX minor hack */ 858 v->mesa_visual.level = level; 859 return v; 860} 861 862 863PUBLIC 864void XMesaDestroyVisual( XMesaVisual v ) 865{ 866 free(v->visinfo); 867 free(v); 868} 869 870 871 872/** 873 * Create a new XMesaContext. 874 * \param v the XMesaVisual 875 * \param share_list another XMesaContext with which to share display 876 * lists or NULL if no sharing is wanted. 877 * \return an XMesaContext or NULL if error. 878 */ 879PUBLIC 880XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 881{ 882 static GLboolean firstTime = GL_TRUE; 883 XMesaContext c; 884 struct gl_context *mesaCtx; 885 struct dd_function_table functions; 886 TNLcontext *tnl; 887 888 if (firstTime) { 889 _glthread_INIT_MUTEX(_xmesa_lock); 890 firstTime = GL_FALSE; 891 } 892 893 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */ 894 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 895 if (!c) 896 return NULL; 897 898 mesaCtx = &(c->mesa); 899 900 /* initialize with default driver functions, then plug in XMesa funcs */ 901 _mesa_init_driver_functions(&functions); 902 xmesa_init_driver_functions(v, &functions); 903 if (!_mesa_initialize_context(mesaCtx, API_OPENGL, &v->mesa_visual, 904 share_list ? &(share_list->mesa) : (struct gl_context *) NULL, 905 &functions, (void *) c)) { 906 free(c); 907 return NULL; 908 } 909 910 /* Enable this to exercise fixed function -> shader translation 911 * with software rendering. 912 */ 913 if (0) { 914 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE; 915 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE; 916 } 917 918 _mesa_enable_sw_extensions(mesaCtx); 919 _mesa_enable_1_3_extensions(mesaCtx); 920 _mesa_enable_1_4_extensions(mesaCtx); 921 _mesa_enable_1_5_extensions(mesaCtx); 922 _mesa_enable_2_0_extensions(mesaCtx); 923 _mesa_enable_2_1_extensions(mesaCtx); 924#if ENABLE_EXT_texure_compression_s3tc 925 if (mesaCtx->Mesa_DXTn) { 926 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 927 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 928 } 929 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 930#endif 931#if ENABLE_EXT_timer_query 932 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 933#endif 934 935 936 /* finish up xmesa context initializations */ 937 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 938 c->xm_visual = v; 939 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 940 c->display = v->display; 941 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 942 943 /* Initialize the software rasterizer and helper modules. 944 */ 945 if (!_swrast_CreateContext( mesaCtx ) || 946 !_vbo_CreateContext( mesaCtx ) || 947 !_tnl_CreateContext( mesaCtx ) || 948 !_swsetup_CreateContext( mesaCtx )) { 949 _mesa_free_context_data(&c->mesa); 950 free(c); 951 return NULL; 952 } 953 954 /* tnl setup */ 955 tnl = TNL_CONTEXT(mesaCtx); 956 tnl->Driver.RunPipeline = _tnl_run_pipeline; 957 /* swrast setup */ 958 xmesa_register_swrast_functions( mesaCtx ); 959 _swsetup_Wakeup(mesaCtx); 960 961 _mesa_meta_init(mesaCtx); 962 963 return c; 964} 965 966 967 968PUBLIC 969void XMesaDestroyContext( XMesaContext c ) 970{ 971 struct gl_context *mesaCtx = &c->mesa; 972 973 _mesa_meta_free( mesaCtx ); 974 975 _swsetup_DestroyContext( mesaCtx ); 976 _swrast_DestroyContext( mesaCtx ); 977 _tnl_DestroyContext( mesaCtx ); 978 _vbo_DestroyContext( mesaCtx ); 979 _mesa_free_context_data( mesaCtx ); 980 free( c ); 981} 982 983 984 985/** 986 * Private function for creating an XMesaBuffer which corresponds to an 987 * X window or pixmap. 988 * \param v the window's XMesaVisual 989 * \param w the window we're wrapping 990 * \return new XMesaBuffer or NULL if error 991 */ 992PUBLIC XMesaBuffer 993XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 994{ 995 XWindowAttributes attr; 996 XMesaBuffer b; 997 XMesaColormap cmap; 998 int depth; 999 1000 assert(v); 1001 assert(w); 1002 1003 /* Check that window depth matches visual depth */ 1004 XGetWindowAttributes( v->display, w, &attr ); 1005 depth = attr.depth; 1006 if (GET_VISUAL_DEPTH(v) != depth) { 1007 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1008 GET_VISUAL_DEPTH(v), depth); 1009 return NULL; 1010 } 1011 1012 /* Find colormap */ 1013 if (attr.colormap) { 1014 cmap = attr.colormap; 1015 } 1016 else { 1017 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1018 /* this is weird, a window w/out a colormap!? */ 1019 /* OK, let's just allocate a new one and hope for the best */ 1020 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1021 } 1022 1023 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1024 if (!b) 1025 return NULL; 1026 1027 if (!initialize_visual_and_buffer( v, b, (XMesaDrawable) w, cmap )) { 1028 xmesa_free_buffer(b); 1029 return NULL; 1030 } 1031 1032 return b; 1033} 1034 1035 1036 1037/** 1038 * Create a new XMesaBuffer from an X pixmap. 1039 * 1040 * \param v the XMesaVisual 1041 * \param p the pixmap 1042 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1043 * \c GLX_DIRECT_COLOR visual for the pixmap 1044 * \returns new XMesaBuffer or NULL if error 1045 */ 1046PUBLIC XMesaBuffer 1047XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1048{ 1049 XMesaBuffer b; 1050 1051 assert(v); 1052 1053 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1054 if (!b) 1055 return NULL; 1056 1057 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) { 1058 xmesa_free_buffer(b); 1059 return NULL; 1060 } 1061 1062 return b; 1063} 1064 1065 1066/** 1067 * For GLX_EXT_texture_from_pixmap 1068 */ 1069XMesaBuffer 1070XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p, 1071 XMesaColormap cmap, 1072 int format, int target, int mipmap) 1073{ 1074 GET_CURRENT_CONTEXT(ctx); 1075 XMesaBuffer b; 1076 GLuint width, height; 1077 1078 assert(v); 1079 1080 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1081 if (!b) 1082 return NULL; 1083 1084 /* get pixmap size, update framebuffer/renderbuffer dims */ 1085 xmesa_get_window_size(v->display, b, &width, &height); 1086 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height); 1087 1088 if (target == 0) { 1089 /* examine dims */ 1090 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1091 target = GLX_TEXTURE_2D_EXT; 1092 } 1093 else if ( _mesa_bitcount(width) == 1 1094 && _mesa_bitcount(height) == 1) { 1095 /* power of two size */ 1096 if (height == 1) { 1097 target = GLX_TEXTURE_1D_EXT; 1098 } 1099 else { 1100 target = GLX_TEXTURE_2D_EXT; 1101 } 1102 } 1103 else if (ctx->Extensions.NV_texture_rectangle) { 1104 target = GLX_TEXTURE_RECTANGLE_EXT; 1105 } 1106 else { 1107 /* non power of two textures not supported */ 1108 XMesaDestroyBuffer(b); 1109 return 0; 1110 } 1111 } 1112 1113 b->TextureTarget = target; 1114 b->TextureFormat = format; 1115 b->TextureMipmap = mipmap; 1116 1117 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) { 1118 xmesa_free_buffer(b); 1119 return NULL; 1120 } 1121 1122 return b; 1123} 1124 1125 1126 1127XMesaBuffer 1128XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1129 unsigned int width, unsigned int height) 1130{ 1131 XMesaWindow root; 1132 XMesaDrawable drawable; /* X Pixmap Drawable */ 1133 XMesaBuffer b; 1134 1135 /* allocate pixmap for front buffer */ 1136 root = RootWindow( v->display, v->visinfo->screen ); 1137 drawable = XCreatePixmap(v->display, root, width, height, 1138 v->visinfo->depth); 1139 if (!drawable) 1140 return NULL; 1141 1142 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1143 if (!b) 1144 return NULL; 1145 1146 if (!initialize_visual_and_buffer(v, b, drawable, cmap)) { 1147 xmesa_free_buffer(b); 1148 return NULL; 1149 } 1150 1151 return b; 1152} 1153 1154 1155 1156/* 1157 * Deallocate an XMesaBuffer structure and all related info. 1158 */ 1159PUBLIC void 1160XMesaDestroyBuffer(XMesaBuffer b) 1161{ 1162 xmesa_free_buffer(b); 1163} 1164 1165 1166/** 1167 * Query the current window size and update the corresponding struct gl_framebuffer 1168 * and all attached renderbuffers. 1169 * Called when: 1170 * 1. the first time a buffer is bound to a context. 1171 * 2. from glViewport to poll for window size changes 1172 * 3. from the XMesaResizeBuffers() API function. 1173 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1174 * when resizing a buffer when no rendering context is bound. 1175 */ 1176void 1177xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1178{ 1179 GLuint width, height; 1180 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1181 if (drawBuffer->mesa_buffer.Width != width || 1182 drawBuffer->mesa_buffer.Height != height) { 1183 struct gl_context *ctx = xmctx ? &xmctx->mesa : NULL; 1184 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1185 } 1186 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1187} 1188 1189 1190/* 1191 * Bind buffer b to context c and make c the current rendering context. 1192 */ 1193GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1194{ 1195 return XMesaMakeCurrent2( c, b, b ); 1196} 1197 1198 1199/* 1200 * Bind buffer b to context c and make c the current rendering context. 1201 */ 1202PUBLIC 1203GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1204 XMesaBuffer readBuffer ) 1205{ 1206 if (c) { 1207 if (!drawBuffer || !readBuffer) 1208 return GL_FALSE; /* must specify buffers! */ 1209 1210 if (&(c->mesa) == _mesa_get_current_context() 1211 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1212 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1213 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1214 /* same context and buffer, do nothing */ 1215 return GL_TRUE; 1216 } 1217 1218 c->xm_buffer = drawBuffer; 1219 1220 /* Call this periodically to detect when the user has begun using 1221 * GL rendering from multiple threads. 1222 */ 1223 _glapi_check_multithread(); 1224 1225 xmesa_check_and_update_buffer_size(c, drawBuffer); 1226 if (readBuffer != drawBuffer) 1227 xmesa_check_and_update_buffer_size(c, readBuffer); 1228 1229 _mesa_make_current(&(c->mesa), 1230 &drawBuffer->mesa_buffer, 1231 &readBuffer->mesa_buffer); 1232 1233 /* 1234 * Must recompute and set these pixel values because colormap 1235 * can be different for different windows. 1236 */ 1237 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1238 c->clearcolor[0], 1239 c->clearcolor[1], 1240 c->clearcolor[2], 1241 c->clearcolor[3], 1242 c->xm_visual->undithered_pf); 1243 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1244 1245 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1246 drawBuffer->wasCurrent = GL_TRUE; 1247 } 1248 else { 1249 /* Detach */ 1250 _mesa_make_current( NULL, NULL, NULL ); 1251 } 1252 return GL_TRUE; 1253} 1254 1255 1256/* 1257 * Unbind the context c from its buffer. 1258 */ 1259GLboolean XMesaUnbindContext( XMesaContext c ) 1260{ 1261 /* A no-op for XFree86 integration purposes */ 1262 return GL_TRUE; 1263} 1264 1265 1266XMesaContext XMesaGetCurrentContext( void ) 1267{ 1268 GET_CURRENT_CONTEXT(ctx); 1269 if (ctx) { 1270 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1271 return xmesa; 1272 } 1273 else { 1274 return 0; 1275 } 1276} 1277 1278 1279XMesaBuffer XMesaGetCurrentBuffer( void ) 1280{ 1281 GET_CURRENT_CONTEXT(ctx); 1282 if (ctx) { 1283 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1284 return xmbuf; 1285 } 1286 else { 1287 return 0; 1288 } 1289} 1290 1291 1292/* New in Mesa 3.1 */ 1293XMesaBuffer XMesaGetCurrentReadBuffer( void ) 1294{ 1295 GET_CURRENT_CONTEXT(ctx); 1296 if (ctx) { 1297 return XMESA_BUFFER(ctx->ReadBuffer); 1298 } 1299 else { 1300 return 0; 1301 } 1302} 1303 1304 1305 1306GLboolean XMesaSetFXmode( GLint mode ) 1307{ 1308 (void) mode; 1309 return GL_FALSE; 1310} 1311 1312 1313 1314/* 1315 * Copy the back buffer to the front buffer. If there's no back buffer 1316 * this is a no-op. 1317 */ 1318PUBLIC 1319void XMesaSwapBuffers( XMesaBuffer b ) 1320{ 1321 GET_CURRENT_CONTEXT(ctx); 1322 1323 if (!b->backxrb) { 1324 /* single buffered */ 1325 return; 1326 } 1327 1328 /* If we're swapping the buffer associated with the current context 1329 * we have to flush any pending rendering commands first. 1330 */ 1331 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 1332 _mesa_notifySwapBuffers(ctx); 1333 1334 if (b->db_mode) { 1335 if (b->backxrb->ximage) { 1336 /* Copy Ximage (back buf) from client memory to server window */ 1337#if defined(USE_XSHM) 1338 if (b->shm) { 1339 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 1340 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 1341 b->swapgc, 1342 b->backxrb->ximage, 0, 0, 1343 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 1344 False ); 1345 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 1346 } 1347 else 1348#endif 1349 { 1350 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 1351 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 1352 b->swapgc, 1353 b->backxrb->ximage, 0, 0, 1354 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 1355 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 1356 } 1357 } 1358 else if (b->backxrb->pixmap) { 1359 /* Copy pixmap (back buf) to window (front buf) on server */ 1360 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 1361 XMesaCopyArea( b->xm_visual->display, 1362 b->backxrb->pixmap, /* source drawable */ 1363 b->frontxrb->drawable, /* dest. drawable */ 1364 b->swapgc, 1365 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 1366 0, 0 /* dest region */ 1367 ); 1368 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 1369 } 1370 } 1371 XSync( b->xm_visual->display, False ); 1372} 1373 1374 1375 1376/* 1377 * Copy sub-region of back buffer to front buffer 1378 */ 1379void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1380{ 1381 GET_CURRENT_CONTEXT(ctx); 1382 1383 /* If we're swapping the buffer associated with the current context 1384 * we have to flush any pending rendering commands first. 1385 */ 1386 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 1387 _mesa_notifySwapBuffers(ctx); 1388 1389 if (!b->backxrb) { 1390 /* single buffered */ 1391 return; 1392 } 1393 1394 if (b->db_mode) { 1395 int yTop = b->mesa_buffer.Height - y - height; 1396 if (b->backxrb->ximage) { 1397 /* Copy Ximage from host's memory to server's window */ 1398#if defined(USE_XSHM) 1399 if (b->shm) { 1400 /* XXX assuming width and height aren't too large! */ 1401 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 1402 b->swapgc, 1403 b->backxrb->ximage, x, yTop, 1404 x, yTop, width, height, False ); 1405 /* wait for finished event??? */ 1406 } 1407 else 1408#endif 1409 { 1410 /* XXX assuming width and height aren't too large! */ 1411 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 1412 b->swapgc, 1413 b->backxrb->ximage, x, yTop, 1414 x, yTop, width, height ); 1415 } 1416 } 1417 else { 1418 /* Copy pixmap to window on server */ 1419 XMesaCopyArea( b->xm_visual->display, 1420 b->backxrb->pixmap, /* source drawable */ 1421 b->frontxrb->drawable, /* dest. drawable */ 1422 b->swapgc, 1423 x, yTop, width, height, /* source region */ 1424 x, yTop /* dest region */ 1425 ); 1426 } 1427 } 1428} 1429 1430 1431/* 1432 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 1433 * is a way to get "under the hood" of X/Mesa so one can manipulate the 1434 * back buffer directly. 1435 * Output: pixmap - pointer to back buffer's Pixmap, or 0 1436 * ximage - pointer to back buffer's XImage, or NULL 1437 * Return: GL_TRUE = context is double buffered 1438 * GL_FALSE = context is single buffered 1439 */ 1440GLboolean XMesaGetBackBuffer( XMesaBuffer b, 1441 XMesaPixmap *pixmap, 1442 XMesaImage **ximage ) 1443{ 1444 if (b->db_mode) { 1445 if (pixmap) 1446 *pixmap = b->backxrb->pixmap; 1447 if (ximage) 1448 *ximage = b->backxrb->ximage; 1449 return GL_TRUE; 1450 } 1451 else { 1452 *pixmap = 0; 1453 *ximage = NULL; 1454 return GL_FALSE; 1455 } 1456} 1457 1458 1459/* 1460 * Return the depth buffer associated with an XMesaBuffer. 1461 * Input: b - the XMesa buffer handle 1462 * Output: width, height - size of buffer in pixels 1463 * bytesPerValue - bytes per depth value (2 or 4) 1464 * buffer - pointer to depth buffer values 1465 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 1466 */ 1467GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 1468 GLint *bytesPerValue, void **buffer ) 1469{ 1470 struct gl_renderbuffer *rb 1471 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 1472 struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb); 1473 1474 if (!xrb || !xrb->Base.Buffer) { 1475 *width = 0; 1476 *height = 0; 1477 *bytesPerValue = 0; 1478 *buffer = 0; 1479 return GL_FALSE; 1480 } 1481 else { 1482 *width = b->mesa_buffer.Width; 1483 *height = b->mesa_buffer.Height; 1484 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 1485 ? sizeof(GLushort) : sizeof(GLuint); 1486 *buffer = (void *) xrb->Base.Buffer; 1487 return GL_TRUE; 1488 } 1489} 1490 1491 1492void XMesaFlush( XMesaContext c ) 1493{ 1494 if (c && c->xm_visual) { 1495 XSync( c->xm_visual->display, False ); 1496 } 1497} 1498 1499 1500 1501const char *XMesaGetString( XMesaContext c, int name ) 1502{ 1503 (void) c; 1504 if (name==XMESA_VERSION) { 1505 return "5.0"; 1506 } 1507 else if (name==XMESA_EXTENSIONS) { 1508 return ""; 1509 } 1510 else { 1511 return NULL; 1512 } 1513} 1514 1515 1516 1517XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 1518{ 1519 XMesaBuffer b; 1520 for (b=XMesaBufferList; b; b=b->Next) { 1521 if (b->frontxrb->drawable == d && b->display == dpy) { 1522 return b; 1523 } 1524 } 1525 return NULL; 1526} 1527 1528 1529/** 1530 * Free/destroy all XMesaBuffers associated with given display. 1531 */ 1532void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 1533{ 1534 XMesaBuffer b, next; 1535 for (b = XMesaBufferList; b; b = next) { 1536 next = b->Next; 1537 if (b->display == dpy) { 1538 xmesa_free_buffer(b); 1539 } 1540 } 1541} 1542 1543 1544/* 1545 * Look for XMesaBuffers whose X window has been destroyed. 1546 * Deallocate any such XMesaBuffers. 1547 */ 1548void XMesaGarbageCollect( XMesaDisplay* dpy ) 1549{ 1550 XMesaBuffer b, next; 1551 for (b=XMesaBufferList; b; b=next) { 1552 next = b->Next; 1553 if (b->display && b->display == dpy && b->frontxrb->drawable && b->type == WINDOW) { 1554 XSync(b->display, False); 1555 if (!window_exists( b->display, b->frontxrb->drawable )) { 1556 /* found a dead window, free the ancillary info */ 1557 XMesaDestroyBuffer( b ); 1558 } 1559 } 1560 } 1561} 1562 1563 1564unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 1565 GLfloat red, GLfloat green, 1566 GLfloat blue, GLfloat alpha ) 1567{ 1568 GLint r = (GLint) (red * 255.0F); 1569 GLint g = (GLint) (green * 255.0F); 1570 GLint b = (GLint) (blue * 255.0F); 1571 GLint a = (GLint) (alpha * 255.0F); 1572 1573 switch (xmesa->pixelformat) { 1574 case PF_Truecolor: 1575 { 1576 unsigned long p; 1577 PACK_TRUECOLOR( p, r, g, b ); 1578 return p; 1579 } 1580 case PF_8A8B8G8R: 1581 return PACK_8A8B8G8R( r, g, b, a ); 1582 case PF_8A8R8G8B: 1583 return PACK_8A8R8G8B( r, g, b, a ); 1584 case PF_8R8G8B: 1585 return PACK_8R8G8B( r, g, b ); 1586 case PF_5R6G5B: 1587 return PACK_5R6G5B( r, g, b ); 1588 case PF_Dither_5R6G5B: 1589 /* fall through */ 1590 case PF_Dither_True: 1591 { 1592 unsigned long p; 1593 PACK_TRUEDITHER(p, x, y, r, g, b); 1594 return p; 1595 } 1596 default: 1597 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 1598 } 1599 return 0; 1600} 1601 1602 1603/* 1604 * This is typically called when the window size changes and we need 1605 * to reallocate the buffer's back/depth/stencil/accum buffers. 1606 */ 1607PUBLIC void 1608XMesaResizeBuffers( XMesaBuffer b ) 1609{ 1610 GET_CURRENT_CONTEXT(ctx); 1611 XMesaContext xmctx = XMESA_CONTEXT(ctx); 1612 if (!xmctx) 1613 return; 1614 xmesa_check_and_update_buffer_size(xmctx, b); 1615} 1616 1617 1618static GLint 1619xbuffer_to_renderbuffer(int buffer) 1620{ 1621 assert(MAX_AUX_BUFFERS <= 4); 1622 1623 switch (buffer) { 1624 case GLX_FRONT_LEFT_EXT: 1625 return BUFFER_FRONT_LEFT; 1626 case GLX_FRONT_RIGHT_EXT: 1627 return BUFFER_FRONT_RIGHT; 1628 case GLX_BACK_LEFT_EXT: 1629 return BUFFER_BACK_LEFT; 1630 case GLX_BACK_RIGHT_EXT: 1631 return BUFFER_BACK_RIGHT; 1632 case GLX_AUX0_EXT: 1633 return BUFFER_AUX0; 1634 case GLX_AUX1_EXT: 1635 case GLX_AUX2_EXT: 1636 case GLX_AUX3_EXT: 1637 case GLX_AUX4_EXT: 1638 case GLX_AUX5_EXT: 1639 case GLX_AUX6_EXT: 1640 case GLX_AUX7_EXT: 1641 case GLX_AUX8_EXT: 1642 case GLX_AUX9_EXT: 1643 default: 1644 /* BadValue error */ 1645 return -1; 1646 } 1647} 1648 1649 1650PUBLIC void 1651XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer, 1652 const int *attrib_list) 1653{ 1654#if 0 1655 GET_CURRENT_CONTEXT(ctx); 1656 const GLuint unit = ctx->Texture.CurrentUnit; 1657 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; 1658 struct gl_texture_object *texObj; 1659#endif 1660 struct gl_renderbuffer *rb; 1661 struct xmesa_renderbuffer *xrb; 1662 GLint b; 1663 XMesaImage *img = NULL; 1664 GLboolean freeImg = GL_FALSE; 1665 1666 b = xbuffer_to_renderbuffer(buffer); 1667 if (b < 0) 1668 return; 1669 1670 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT) 1671 return; /* BadMatch error */ 1672 1673 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer; 1674 if (!rb) { 1675 /* invalid buffer */ 1676 return; 1677 } 1678 xrb = xmesa_renderbuffer(rb); 1679 1680#if 0 1681 switch (drawable->TextureTarget) { 1682 case GLX_TEXTURE_1D_EXT: 1683 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX]; 1684 break; 1685 case GLX_TEXTURE_2D_EXT: 1686 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX]; 1687 break; 1688 case GLX_TEXTURE_RECTANGLE_EXT: 1689 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX]; 1690 break; 1691 default: 1692 return; /* BadMatch error */ 1693 } 1694#endif 1695 1696 /* 1697 * The following is a quick and simple way to implement 1698 * BindTexImage. The better way is to write some new FetchTexel() 1699 * functions which would extract texels from XImages. We'd still 1700 * need to use GetImage when texturing from a Pixmap (front buffer) 1701 * but texturing from a back buffer (XImage) would avoid an image 1702 * copy. 1703 */ 1704 1705 /* get XImage */ 1706 if (xrb->pixmap) { 1707 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L, 1708 ZPixmap); 1709 freeImg = GL_TRUE; 1710 } 1711 else if (xrb->ximage) { 1712 img = xrb->ximage; 1713 } 1714 1715 /* store the XImage as a new texture image */ 1716 if (img) { 1717 GLenum format, type, intFormat; 1718 if (img->bits_per_pixel == 32) { 1719 format = GL_BGRA; 1720 type = GL_UNSIGNED_BYTE; 1721 intFormat = GL_RGBA; 1722 } 1723 else if (img->bits_per_pixel == 24) { 1724 format = GL_BGR; 1725 type = GL_UNSIGNED_BYTE; 1726 intFormat = GL_RGB; 1727 } 1728 else if (img->bits_per_pixel == 16) { 1729 format = GL_BGR; 1730 type = GL_UNSIGNED_SHORT_5_6_5; 1731 intFormat = GL_RGB; 1732 } 1733 else { 1734 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage"); 1735 return; 1736 } 1737 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) { 1738 intFormat = GL_RGBA; 1739 } 1740 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) { 1741 intFormat = GL_RGB; 1742 } 1743 1744 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0, 1745 format, type, img->data); 1746 1747 if (freeImg) { 1748 XMesaDestroyImage(img); 1749 } 1750 } 1751} 1752 1753 1754 1755PUBLIC void 1756XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer) 1757{ 1758 const GLint b = xbuffer_to_renderbuffer(buffer); 1759 if (b < 0) 1760 return; 1761 1762 /* no-op for now */ 1763} 1764 1765