xm_api.c revision 7a36345f70a0b8ac2d480bb52eb2c74c2be5a978
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); 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); 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 char *data; 604 605 /* Do window-specific initializations */ 606 607 /* these should have been set in create_xmesa_buffer */ 608 ASSERT(b->frontxrb->drawable == window); 609 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 610 611 /* Setup for single/double buffering */ 612 if (v->mesa_visual.doubleBufferMode) { 613 /* Double buffered */ 614 b->shm = check_for_xshm( v->display ); 615 } 616 617 /* X11 graphics contexts */ 618 b->gc = XCreateGC( v->display, window, 0, NULL ); 619 XMesaSetFunction( v->display, b->gc, GXcopy ); 620 621 /* cleargc - for glClear() */ 622 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 623 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 624 625 /* 626 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 627 * Patch contributed by Michael Pichler May 15, 1995. 628 */ 629 { 630 XGCValues gcvalues; 631 gcvalues.graphics_exposures = False; 632 b->swapgc = XCreateGC(v->display, window, 633 GCGraphicsExposures, &gcvalues); 634 } 635 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 636 637 /* Initialize the row buffer XImage for use in write_color_span() */ 638 data = (char*) MALLOC(MAX_WIDTH*4); 639 b->rowimage = XCreateImage( v->display, 640 v->visinfo->visual, 641 v->visinfo->depth, 642 ZPixmap, 0, /*format, offset*/ 643 data, /*data*/ 644 MAX_WIDTH, 1, /*width, height*/ 645 32, /*bitmap_pad*/ 646 0 /*bytes_per_line*/ ); 647 if (!b->rowimage) 648 return GL_FALSE; 649 } 650 651 return GL_TRUE; 652} 653 654 655 656/* 657 * Convert an RGBA color to a pixel value. 658 */ 659unsigned long 660xmesa_color_to_pixel(struct gl_context *ctx, 661 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 662 GLuint pixelFormat) 663{ 664 XMesaContext xmesa = XMESA_CONTEXT(ctx); 665 switch (pixelFormat) { 666 case PF_Truecolor: 667 { 668 unsigned long p; 669 PACK_TRUECOLOR( p, r, g, b ); 670 return p; 671 } 672 case PF_8A8B8G8R: 673 return PACK_8A8B8G8R( r, g, b, a ); 674 case PF_8A8R8G8B: 675 return PACK_8A8R8G8B( r, g, b, a ); 676 case PF_8R8G8B: 677 /* fall through */ 678 case PF_8R8G8B24: 679 return PACK_8R8G8B( r, g, b ); 680 case PF_5R6G5B: 681 return PACK_5R6G5B( r, g, b ); 682 case PF_Dither_True: 683 /* fall through */ 684 case PF_Dither_5R6G5B: 685 { 686 unsigned long p; 687 PACK_TRUEDITHER(p, 1, 0, r, g, b); 688 return p; 689 } 690 default: 691 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 692 } 693 return 0; 694} 695 696 697#define NUM_VISUAL_TYPES 6 698 699/** 700 * Convert an X visual type to a GLX visual type. 701 * 702 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 703 * to be converted. 704 * \return If \c visualType is a valid X visual type, a GLX visual type will 705 * be returned. Otherwise \c GLX_NONE will be returned. 706 * 707 * \note 708 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 709 * DRI CVS tree. 710 */ 711static GLint 712xmesa_convert_from_x_visual_type( int visualType ) 713{ 714 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 715 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 716 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 717 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 718 }; 719 720 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 721 ? glx_visual_types[ visualType ] : GLX_NONE; 722} 723 724 725/**********************************************************************/ 726/***** Public Functions *****/ 727/**********************************************************************/ 728 729 730/* 731 * Create a new X/Mesa visual. 732 * Input: display - X11 display 733 * visinfo - an XVisualInfo pointer 734 * rgb_flag - GL_TRUE = RGB mode, 735 * GL_FALSE = color index mode 736 * alpha_flag - alpha buffer requested? 737 * db_flag - GL_TRUE = double-buffered, 738 * GL_FALSE = single buffered 739 * stereo_flag - stereo visual? 740 * ximage_flag - GL_TRUE = use an XImage for back buffer, 741 * GL_FALSE = use an off-screen pixmap for back buffer 742 * depth_size - requested bits/depth values, or zero 743 * stencil_size - requested bits/stencil values, or zero 744 * accum_red_size - requested bits/red accum values, or zero 745 * accum_green_size - requested bits/green accum values, or zero 746 * accum_blue_size - requested bits/blue accum values, or zero 747 * accum_alpha_size - requested bits/alpha accum values, or zero 748 * num_samples - number of samples/pixel if multisampling, or zero 749 * level - visual level, usually 0 750 * visualCaveat - ala the GLX extension, usually GLX_NONE 751 * Return; a new XMesaVisual or 0 if error. 752 */ 753PUBLIC 754XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 755 XMesaVisualInfo visinfo, 756 GLboolean rgb_flag, 757 GLboolean alpha_flag, 758 GLboolean db_flag, 759 GLboolean stereo_flag, 760 GLboolean ximage_flag, 761 GLint depth_size, 762 GLint stencil_size, 763 GLint accum_red_size, 764 GLint accum_green_size, 765 GLint accum_blue_size, 766 GLint accum_alpha_size, 767 GLint num_samples, 768 GLint level, 769 GLint visualCaveat ) 770{ 771 char *gamma; 772 XMesaVisual v; 773 GLint red_bits, green_bits, blue_bits, alpha_bits; 774 775 /* For debugging only */ 776 if (_mesa_getenv("MESA_XSYNC")) { 777 /* This makes debugging X easier. 778 * In your debugger, set a breakpoint on _XError to stop when an 779 * X protocol error is generated. 780 */ 781 XSynchronize( display, 1 ); 782 } 783 784 /* Color-index rendering not supported. */ 785 if (!rgb_flag) 786 return NULL; 787 788 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 789 if (!v) { 790 return NULL; 791 } 792 793 v->display = display; 794 795 /* Save a copy of the XVisualInfo struct because the user may Xfree() 796 * the struct but we may need some of the information contained in it 797 * at a later time. 798 */ 799 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 800 if(!v->visinfo) { 801 free(v); 802 return NULL; 803 } 804 memcpy(v->visinfo, visinfo, sizeof(*visinfo)); 805 806 /* check for MESA_GAMMA environment variable */ 807 gamma = _mesa_getenv("MESA_GAMMA"); 808 if (gamma) { 809 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 810 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 811 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 812 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 813 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 814 } 815 else { 816 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 817 } 818 819 v->ximage_flag = ximage_flag; 820 821 v->mesa_visual.redMask = visinfo->red_mask; 822 v->mesa_visual.greenMask = visinfo->green_mask; 823 v->mesa_visual.blueMask = visinfo->blue_mask; 824 v->visualID = visinfo->visualid; 825 v->screen = visinfo->screen; 826 827#if !(defined(__cplusplus) || defined(c_plusplus)) 828 v->visualType = xmesa_convert_from_x_visual_type(visinfo->class); 829#else 830 v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 831#endif 832 833 v->mesa_visual.visualRating = visualCaveat; 834 835 if (alpha_flag) 836 v->mesa_visual.alphaBits = 8; 837 838 (void) initialize_visual_and_buffer( v, NULL, 0, 0 ); 839 840 { 841 const int xclass = v->visualType; 842 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 843 red_bits = _mesa_bitcount(GET_REDMASK(v)); 844 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 845 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 846 } 847 else { 848 /* this is an approximation */ 849 int depth; 850 depth = GET_VISUAL_DEPTH(v); 851 red_bits = depth / 3; 852 depth -= red_bits; 853 green_bits = depth / 2; 854 depth -= green_bits; 855 blue_bits = depth; 856 alpha_bits = 0; 857 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 858 } 859 alpha_bits = v->mesa_visual.alphaBits; 860 } 861 862 _mesa_initialize_visual( &v->mesa_visual, 863 db_flag, stereo_flag, 864 red_bits, green_bits, 865 blue_bits, alpha_bits, 866 depth_size, 867 stencil_size, 868 accum_red_size, accum_green_size, 869 accum_blue_size, accum_alpha_size, 870 0 ); 871 872 /* XXX minor hack */ 873 v->mesa_visual.level = level; 874 return v; 875} 876 877 878PUBLIC 879void XMesaDestroyVisual( XMesaVisual v ) 880{ 881 free(v->visinfo); 882 free(v); 883} 884 885 886 887/** 888 * Create a new XMesaContext. 889 * \param v the XMesaVisual 890 * \param share_list another XMesaContext with which to share display 891 * lists or NULL if no sharing is wanted. 892 * \return an XMesaContext or NULL if error. 893 */ 894PUBLIC 895XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 896{ 897 static GLboolean firstTime = GL_TRUE; 898 XMesaContext c; 899 struct gl_context *mesaCtx; 900 struct dd_function_table functions; 901 TNLcontext *tnl; 902 903 if (firstTime) { 904 _glthread_INIT_MUTEX(_xmesa_lock); 905 firstTime = GL_FALSE; 906 } 907 908 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */ 909 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 910 if (!c) 911 return NULL; 912 913 mesaCtx = &(c->mesa); 914 915 /* initialize with default driver functions, then plug in XMesa funcs */ 916 _mesa_init_driver_functions(&functions); 917 xmesa_init_driver_functions(v, &functions); 918 if (!_mesa_initialize_context(mesaCtx, API_OPENGL, &v->mesa_visual, 919 share_list ? &(share_list->mesa) : (struct gl_context *) NULL, 920 &functions, (void *) c)) { 921 free(c); 922 return NULL; 923 } 924 925 /* Enable this to exercise fixed function -> shader translation 926 * with software rendering. 927 */ 928 if (0) { 929 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE; 930 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE; 931 } 932 933 _mesa_enable_sw_extensions(mesaCtx); 934 _mesa_enable_1_3_extensions(mesaCtx); 935 _mesa_enable_1_4_extensions(mesaCtx); 936 _mesa_enable_1_5_extensions(mesaCtx); 937 _mesa_enable_2_0_extensions(mesaCtx); 938 _mesa_enable_2_1_extensions(mesaCtx); 939#if ENABLE_EXT_texure_compression_s3tc 940 if (mesaCtx->Mesa_DXTn) { 941 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 942 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 943 } 944 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 945#endif 946#if ENABLE_EXT_timer_query 947 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 948#endif 949 950 951 /* finish up xmesa context initializations */ 952 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 953 c->xm_visual = v; 954 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 955 c->display = v->display; 956 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 957 958 /* Initialize the software rasterizer and helper modules. 959 */ 960 if (!_swrast_CreateContext( mesaCtx ) || 961 !_vbo_CreateContext( mesaCtx ) || 962 !_tnl_CreateContext( mesaCtx ) || 963 !_swsetup_CreateContext( mesaCtx )) { 964 _mesa_free_context_data(&c->mesa); 965 free(c); 966 return NULL; 967 } 968 969 /* tnl setup */ 970 tnl = TNL_CONTEXT(mesaCtx); 971 tnl->Driver.RunPipeline = _tnl_run_pipeline; 972 /* swrast setup */ 973 xmesa_register_swrast_functions( mesaCtx ); 974 _swsetup_Wakeup(mesaCtx); 975 976 _mesa_meta_init(mesaCtx); 977 978 return c; 979} 980 981 982 983PUBLIC 984void XMesaDestroyContext( XMesaContext c ) 985{ 986 struct gl_context *mesaCtx = &c->mesa; 987 988 _mesa_meta_free( mesaCtx ); 989 990 _swsetup_DestroyContext( mesaCtx ); 991 _swrast_DestroyContext( mesaCtx ); 992 _tnl_DestroyContext( mesaCtx ); 993 _vbo_DestroyContext( mesaCtx ); 994 _mesa_free_context_data( mesaCtx ); 995 free( c ); 996} 997 998 999 1000/** 1001 * Private function for creating an XMesaBuffer which corresponds to an 1002 * X window or pixmap. 1003 * \param v the window's XMesaVisual 1004 * \param w the window we're wrapping 1005 * \return new XMesaBuffer or NULL if error 1006 */ 1007PUBLIC XMesaBuffer 1008XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1009{ 1010 XWindowAttributes attr; 1011 XMesaBuffer b; 1012 XMesaColormap cmap; 1013 int depth; 1014 1015 assert(v); 1016 assert(w); 1017 1018 /* Check that window depth matches visual depth */ 1019 XGetWindowAttributes( v->display, w, &attr ); 1020 depth = attr.depth; 1021 if (GET_VISUAL_DEPTH(v) != depth) { 1022 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1023 GET_VISUAL_DEPTH(v), depth); 1024 return NULL; 1025 } 1026 1027 /* Find colormap */ 1028 if (attr.colormap) { 1029 cmap = attr.colormap; 1030 } 1031 else { 1032 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1033 /* this is weird, a window w/out a colormap!? */ 1034 /* OK, let's just allocate a new one and hope for the best */ 1035 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1036 } 1037 1038 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1039 if (!b) 1040 return NULL; 1041 1042 if (!initialize_visual_and_buffer( v, b, (XMesaDrawable) w, cmap )) { 1043 xmesa_free_buffer(b); 1044 return NULL; 1045 } 1046 1047 return b; 1048} 1049 1050 1051 1052/** 1053 * Create a new XMesaBuffer from an X pixmap. 1054 * 1055 * \param v the XMesaVisual 1056 * \param p the pixmap 1057 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1058 * \c GLX_DIRECT_COLOR visual for the pixmap 1059 * \returns new XMesaBuffer or NULL if error 1060 */ 1061PUBLIC XMesaBuffer 1062XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1063{ 1064 XMesaBuffer b; 1065 1066 assert(v); 1067 1068 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1069 if (!b) 1070 return NULL; 1071 1072 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) { 1073 xmesa_free_buffer(b); 1074 return NULL; 1075 } 1076 1077 return b; 1078} 1079 1080 1081/** 1082 * For GLX_EXT_texture_from_pixmap 1083 */ 1084XMesaBuffer 1085XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p, 1086 XMesaColormap cmap, 1087 int format, int target, int mipmap) 1088{ 1089 GET_CURRENT_CONTEXT(ctx); 1090 XMesaBuffer b; 1091 GLuint width, height; 1092 1093 assert(v); 1094 1095 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1096 if (!b) 1097 return NULL; 1098 1099 /* get pixmap size, update framebuffer/renderbuffer dims */ 1100 xmesa_get_window_size(v->display, b, &width, &height); 1101 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height); 1102 1103 if (target == 0) { 1104 /* examine dims */ 1105 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1106 target = GLX_TEXTURE_2D_EXT; 1107 } 1108 else if ( _mesa_bitcount(width) == 1 1109 && _mesa_bitcount(height) == 1) { 1110 /* power of two size */ 1111 if (height == 1) { 1112 target = GLX_TEXTURE_1D_EXT; 1113 } 1114 else { 1115 target = GLX_TEXTURE_2D_EXT; 1116 } 1117 } 1118 else if (ctx->Extensions.NV_texture_rectangle) { 1119 target = GLX_TEXTURE_RECTANGLE_EXT; 1120 } 1121 else { 1122 /* non power of two textures not supported */ 1123 XMesaDestroyBuffer(b); 1124 return 0; 1125 } 1126 } 1127 1128 b->TextureTarget = target; 1129 b->TextureFormat = format; 1130 b->TextureMipmap = mipmap; 1131 1132 if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) { 1133 xmesa_free_buffer(b); 1134 return NULL; 1135 } 1136 1137 return b; 1138} 1139 1140 1141 1142XMesaBuffer 1143XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1144 unsigned int width, unsigned int height) 1145{ 1146 XMesaWindow root; 1147 XMesaDrawable drawable; /* X Pixmap Drawable */ 1148 XMesaBuffer b; 1149 1150 /* allocate pixmap for front buffer */ 1151 root = RootWindow( v->display, v->visinfo->screen ); 1152 drawable = XCreatePixmap(v->display, root, width, height, 1153 v->visinfo->depth); 1154 if (!drawable) 1155 return NULL; 1156 1157 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1158 if (!b) 1159 return NULL; 1160 1161 if (!initialize_visual_and_buffer(v, b, drawable, cmap)) { 1162 xmesa_free_buffer(b); 1163 return NULL; 1164 } 1165 1166 return b; 1167} 1168 1169 1170 1171/* 1172 * Deallocate an XMesaBuffer structure and all related info. 1173 */ 1174PUBLIC void 1175XMesaDestroyBuffer(XMesaBuffer b) 1176{ 1177 xmesa_free_buffer(b); 1178} 1179 1180 1181/** 1182 * Query the current window size and update the corresponding struct gl_framebuffer 1183 * and all attached renderbuffers. 1184 * Called when: 1185 * 1. the first time a buffer is bound to a context. 1186 * 2. from glViewport to poll for window size changes 1187 * 3. from the XMesaResizeBuffers() API function. 1188 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1189 * when resizing a buffer when no rendering context is bound. 1190 */ 1191void 1192xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1193{ 1194 GLuint width, height; 1195 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1196 if (drawBuffer->mesa_buffer.Width != width || 1197 drawBuffer->mesa_buffer.Height != height) { 1198 struct gl_context *ctx = xmctx ? &xmctx->mesa : NULL; 1199 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1200 } 1201 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1202} 1203 1204 1205/* 1206 * Bind buffer b to context c and make c the current rendering context. 1207 */ 1208GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1209{ 1210 return XMesaMakeCurrent2( c, b, b ); 1211} 1212 1213 1214/* 1215 * Bind buffer b to context c and make c the current rendering context. 1216 */ 1217PUBLIC 1218GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1219 XMesaBuffer readBuffer ) 1220{ 1221 if (c) { 1222 if (!drawBuffer || !readBuffer) 1223 return GL_FALSE; /* must specify buffers! */ 1224 1225 if (&(c->mesa) == _mesa_get_current_context() 1226 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1227 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1228 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1229 /* same context and buffer, do nothing */ 1230 return GL_TRUE; 1231 } 1232 1233 c->xm_buffer = drawBuffer; 1234 1235 /* Call this periodically to detect when the user has begun using 1236 * GL rendering from multiple threads. 1237 */ 1238 _glapi_check_multithread(); 1239 1240 xmesa_check_and_update_buffer_size(c, drawBuffer); 1241 if (readBuffer != drawBuffer) 1242 xmesa_check_and_update_buffer_size(c, readBuffer); 1243 1244 _mesa_make_current(&(c->mesa), 1245 &drawBuffer->mesa_buffer, 1246 &readBuffer->mesa_buffer); 1247 1248 /* 1249 * Must recompute and set these pixel values because colormap 1250 * can be different for different windows. 1251 */ 1252 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1253 c->clearcolor[0], 1254 c->clearcolor[1], 1255 c->clearcolor[2], 1256 c->clearcolor[3], 1257 c->xm_visual->undithered_pf); 1258 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1259 1260 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1261 drawBuffer->wasCurrent = GL_TRUE; 1262 } 1263 else { 1264 /* Detach */ 1265 _mesa_make_current( NULL, NULL, NULL ); 1266 } 1267 return GL_TRUE; 1268} 1269 1270 1271/* 1272 * Unbind the context c from its buffer. 1273 */ 1274GLboolean XMesaUnbindContext( XMesaContext c ) 1275{ 1276 /* A no-op for XFree86 integration purposes */ 1277 return GL_TRUE; 1278} 1279 1280 1281XMesaContext XMesaGetCurrentContext( void ) 1282{ 1283 GET_CURRENT_CONTEXT(ctx); 1284 if (ctx) { 1285 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1286 return xmesa; 1287 } 1288 else { 1289 return 0; 1290 } 1291} 1292 1293 1294XMesaBuffer XMesaGetCurrentBuffer( void ) 1295{ 1296 GET_CURRENT_CONTEXT(ctx); 1297 if (ctx) { 1298 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1299 return xmbuf; 1300 } 1301 else { 1302 return 0; 1303 } 1304} 1305 1306 1307/* New in Mesa 3.1 */ 1308XMesaBuffer XMesaGetCurrentReadBuffer( void ) 1309{ 1310 GET_CURRENT_CONTEXT(ctx); 1311 if (ctx) { 1312 return XMESA_BUFFER(ctx->ReadBuffer); 1313 } 1314 else { 1315 return 0; 1316 } 1317} 1318 1319 1320 1321GLboolean XMesaSetFXmode( GLint mode ) 1322{ 1323 (void) mode; 1324 return GL_FALSE; 1325} 1326 1327 1328 1329/* 1330 * Copy the back buffer to the front buffer. If there's no back buffer 1331 * this is a no-op. 1332 */ 1333PUBLIC 1334void XMesaSwapBuffers( XMesaBuffer b ) 1335{ 1336 GET_CURRENT_CONTEXT(ctx); 1337 1338 if (!b->backxrb) { 1339 /* single buffered */ 1340 return; 1341 } 1342 1343 /* If we're swapping the buffer associated with the current context 1344 * we have to flush any pending rendering commands first. 1345 */ 1346 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 1347 _mesa_notifySwapBuffers(ctx); 1348 1349 if (b->db_mode) { 1350 if (b->backxrb->ximage) { 1351 /* Copy Ximage (back buf) from client memory to server window */ 1352#if defined(USE_XSHM) 1353 if (b->shm) { 1354 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 1355 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 1356 b->swapgc, 1357 b->backxrb->ximage, 0, 0, 1358 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 1359 False ); 1360 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 1361 } 1362 else 1363#endif 1364 { 1365 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 1366 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 1367 b->swapgc, 1368 b->backxrb->ximage, 0, 0, 1369 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 1370 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 1371 } 1372 } 1373 else if (b->backxrb->pixmap) { 1374 /* Copy pixmap (back buf) to window (front buf) on server */ 1375 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 1376 XMesaCopyArea( b->xm_visual->display, 1377 b->backxrb->pixmap, /* source drawable */ 1378 b->frontxrb->drawable, /* dest. drawable */ 1379 b->swapgc, 1380 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 1381 0, 0 /* dest region */ 1382 ); 1383 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 1384 } 1385 } 1386 XSync( b->xm_visual->display, False ); 1387} 1388 1389 1390 1391/* 1392 * Copy sub-region of back buffer to front buffer 1393 */ 1394void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 1395{ 1396 GET_CURRENT_CONTEXT(ctx); 1397 1398 /* If we're swapping the buffer associated with the current context 1399 * we have to flush any pending rendering commands first. 1400 */ 1401 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 1402 _mesa_notifySwapBuffers(ctx); 1403 1404 if (!b->backxrb) { 1405 /* single buffered */ 1406 return; 1407 } 1408 1409 if (b->db_mode) { 1410 int yTop = b->mesa_buffer.Height - y - height; 1411 if (b->backxrb->ximage) { 1412 /* Copy Ximage from host's memory to server's window */ 1413#if defined(USE_XSHM) 1414 if (b->shm) { 1415 /* XXX assuming width and height aren't too large! */ 1416 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 1417 b->swapgc, 1418 b->backxrb->ximage, x, yTop, 1419 x, yTop, width, height, False ); 1420 /* wait for finished event??? */ 1421 } 1422 else 1423#endif 1424 { 1425 /* XXX assuming width and height aren't too large! */ 1426 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 1427 b->swapgc, 1428 b->backxrb->ximage, x, yTop, 1429 x, yTop, width, height ); 1430 } 1431 } 1432 else { 1433 /* Copy pixmap to window on server */ 1434 XMesaCopyArea( b->xm_visual->display, 1435 b->backxrb->pixmap, /* source drawable */ 1436 b->frontxrb->drawable, /* dest. drawable */ 1437 b->swapgc, 1438 x, yTop, width, height, /* source region */ 1439 x, yTop /* dest region */ 1440 ); 1441 } 1442 } 1443} 1444 1445 1446/* 1447 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 1448 * is a way to get "under the hood" of X/Mesa so one can manipulate the 1449 * back buffer directly. 1450 * Output: pixmap - pointer to back buffer's Pixmap, or 0 1451 * ximage - pointer to back buffer's XImage, or NULL 1452 * Return: GL_TRUE = context is double buffered 1453 * GL_FALSE = context is single buffered 1454 */ 1455GLboolean XMesaGetBackBuffer( XMesaBuffer b, 1456 XMesaPixmap *pixmap, 1457 XMesaImage **ximage ) 1458{ 1459 if (b->db_mode) { 1460 if (pixmap) 1461 *pixmap = b->backxrb->pixmap; 1462 if (ximage) 1463 *ximage = b->backxrb->ximage; 1464 return GL_TRUE; 1465 } 1466 else { 1467 *pixmap = 0; 1468 *ximage = NULL; 1469 return GL_FALSE; 1470 } 1471} 1472 1473 1474/* 1475 * Return the depth buffer associated with an XMesaBuffer. 1476 * Input: b - the XMesa buffer handle 1477 * Output: width, height - size of buffer in pixels 1478 * bytesPerValue - bytes per depth value (2 or 4) 1479 * buffer - pointer to depth buffer values 1480 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 1481 */ 1482GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 1483 GLint *bytesPerValue, void **buffer ) 1484{ 1485 struct gl_renderbuffer *rb 1486 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 1487 if (!rb || !rb->Buffer) { 1488 *width = 0; 1489 *height = 0; 1490 *bytesPerValue = 0; 1491 *buffer = 0; 1492 return GL_FALSE; 1493 } 1494 else { 1495 *width = b->mesa_buffer.Width; 1496 *height = b->mesa_buffer.Height; 1497 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 1498 ? sizeof(GLushort) : sizeof(GLuint); 1499 *buffer = (void *) rb->Buffer; 1500 return GL_TRUE; 1501 } 1502} 1503 1504 1505void XMesaFlush( XMesaContext c ) 1506{ 1507 if (c && c->xm_visual) { 1508 XSync( c->xm_visual->display, False ); 1509 } 1510} 1511 1512 1513 1514const char *XMesaGetString( XMesaContext c, int name ) 1515{ 1516 (void) c; 1517 if (name==XMESA_VERSION) { 1518 return "5.0"; 1519 } 1520 else if (name==XMESA_EXTENSIONS) { 1521 return ""; 1522 } 1523 else { 1524 return NULL; 1525 } 1526} 1527 1528 1529 1530XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 1531{ 1532 XMesaBuffer b; 1533 for (b=XMesaBufferList; b; b=b->Next) { 1534 if (b->frontxrb->drawable == d && b->display == dpy) { 1535 return b; 1536 } 1537 } 1538 return NULL; 1539} 1540 1541 1542/** 1543 * Free/destroy all XMesaBuffers associated with given display. 1544 */ 1545void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 1546{ 1547 XMesaBuffer b, next; 1548 for (b = XMesaBufferList; b; b = next) { 1549 next = b->Next; 1550 if (b->display == dpy) { 1551 xmesa_free_buffer(b); 1552 } 1553 } 1554} 1555 1556 1557/* 1558 * Look for XMesaBuffers whose X window has been destroyed. 1559 * Deallocate any such XMesaBuffers. 1560 */ 1561void XMesaGarbageCollect( XMesaDisplay* dpy ) 1562{ 1563 XMesaBuffer b, next; 1564 for (b=XMesaBufferList; b; b=next) { 1565 next = b->Next; 1566 if (b->display && b->display == dpy && b->frontxrb->drawable && b->type == WINDOW) { 1567 XSync(b->display, False); 1568 if (!window_exists( b->display, b->frontxrb->drawable )) { 1569 /* found a dead window, free the ancillary info */ 1570 XMesaDestroyBuffer( b ); 1571 } 1572 } 1573 } 1574} 1575 1576 1577unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 1578 GLfloat red, GLfloat green, 1579 GLfloat blue, GLfloat alpha ) 1580{ 1581 GLint r = (GLint) (red * 255.0F); 1582 GLint g = (GLint) (green * 255.0F); 1583 GLint b = (GLint) (blue * 255.0F); 1584 GLint a = (GLint) (alpha * 255.0F); 1585 1586 switch (xmesa->pixelformat) { 1587 case PF_Truecolor: 1588 { 1589 unsigned long p; 1590 PACK_TRUECOLOR( p, r, g, b ); 1591 return p; 1592 } 1593 case PF_8A8B8G8R: 1594 return PACK_8A8B8G8R( r, g, b, a ); 1595 case PF_8A8R8G8B: 1596 return PACK_8A8R8G8B( r, g, b, a ); 1597 case PF_8R8G8B: 1598 return PACK_8R8G8B( r, g, b ); 1599 case PF_5R6G5B: 1600 return PACK_5R6G5B( r, g, b ); 1601 case PF_Dither_5R6G5B: 1602 /* fall through */ 1603 case PF_Dither_True: 1604 { 1605 unsigned long p; 1606 PACK_TRUEDITHER(p, x, y, r, g, b); 1607 return p; 1608 } 1609 default: 1610 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 1611 } 1612 return 0; 1613} 1614 1615 1616/* 1617 * This is typically called when the window size changes and we need 1618 * to reallocate the buffer's back/depth/stencil/accum buffers. 1619 */ 1620PUBLIC void 1621XMesaResizeBuffers( XMesaBuffer b ) 1622{ 1623 GET_CURRENT_CONTEXT(ctx); 1624 XMesaContext xmctx = XMESA_CONTEXT(ctx); 1625 if (!xmctx) 1626 return; 1627 xmesa_check_and_update_buffer_size(xmctx, b); 1628} 1629 1630 1631static GLint 1632xbuffer_to_renderbuffer(int buffer) 1633{ 1634 assert(MAX_AUX_BUFFERS <= 4); 1635 1636 switch (buffer) { 1637 case GLX_FRONT_LEFT_EXT: 1638 return BUFFER_FRONT_LEFT; 1639 case GLX_FRONT_RIGHT_EXT: 1640 return BUFFER_FRONT_RIGHT; 1641 case GLX_BACK_LEFT_EXT: 1642 return BUFFER_BACK_LEFT; 1643 case GLX_BACK_RIGHT_EXT: 1644 return BUFFER_BACK_RIGHT; 1645 case GLX_AUX0_EXT: 1646 return BUFFER_AUX0; 1647 case GLX_AUX1_EXT: 1648 case GLX_AUX2_EXT: 1649 case GLX_AUX3_EXT: 1650 case GLX_AUX4_EXT: 1651 case GLX_AUX5_EXT: 1652 case GLX_AUX6_EXT: 1653 case GLX_AUX7_EXT: 1654 case GLX_AUX8_EXT: 1655 case GLX_AUX9_EXT: 1656 default: 1657 /* BadValue error */ 1658 return -1; 1659 } 1660} 1661 1662 1663PUBLIC void 1664XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer, 1665 const int *attrib_list) 1666{ 1667#if 0 1668 GET_CURRENT_CONTEXT(ctx); 1669 const GLuint unit = ctx->Texture.CurrentUnit; 1670 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; 1671 struct gl_texture_object *texObj; 1672#endif 1673 struct gl_renderbuffer *rb; 1674 struct xmesa_renderbuffer *xrb; 1675 GLint b; 1676 XMesaImage *img = NULL; 1677 GLboolean freeImg = GL_FALSE; 1678 1679 b = xbuffer_to_renderbuffer(buffer); 1680 if (b < 0) 1681 return; 1682 1683 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT) 1684 return; /* BadMatch error */ 1685 1686 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer; 1687 if (!rb) { 1688 /* invalid buffer */ 1689 return; 1690 } 1691 xrb = xmesa_renderbuffer(rb); 1692 1693#if 0 1694 switch (drawable->TextureTarget) { 1695 case GLX_TEXTURE_1D_EXT: 1696 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX]; 1697 break; 1698 case GLX_TEXTURE_2D_EXT: 1699 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX]; 1700 break; 1701 case GLX_TEXTURE_RECTANGLE_EXT: 1702 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX]; 1703 break; 1704 default: 1705 return; /* BadMatch error */ 1706 } 1707#endif 1708 1709 /* 1710 * The following is a quick and simple way to implement 1711 * BindTexImage. The better way is to write some new FetchTexel() 1712 * functions which would extract texels from XImages. We'd still 1713 * need to use GetImage when texturing from a Pixmap (front buffer) 1714 * but texturing from a back buffer (XImage) would avoid an image 1715 * copy. 1716 */ 1717 1718 /* get XImage */ 1719 if (xrb->pixmap) { 1720 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L, 1721 ZPixmap); 1722 freeImg = GL_TRUE; 1723 } 1724 else if (xrb->ximage) { 1725 img = xrb->ximage; 1726 } 1727 1728 /* store the XImage as a new texture image */ 1729 if (img) { 1730 GLenum format, type, intFormat; 1731 if (img->bits_per_pixel == 32) { 1732 format = GL_BGRA; 1733 type = GL_UNSIGNED_BYTE; 1734 intFormat = GL_RGBA; 1735 } 1736 else if (img->bits_per_pixel == 24) { 1737 format = GL_BGR; 1738 type = GL_UNSIGNED_BYTE; 1739 intFormat = GL_RGB; 1740 } 1741 else if (img->bits_per_pixel == 16) { 1742 format = GL_BGR; 1743 type = GL_UNSIGNED_SHORT_5_6_5; 1744 intFormat = GL_RGB; 1745 } 1746 else { 1747 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage"); 1748 return; 1749 } 1750 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) { 1751 intFormat = GL_RGBA; 1752 } 1753 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) { 1754 intFormat = GL_RGB; 1755 } 1756 1757 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0, 1758 format, type, img->data); 1759 1760 if (freeImg) { 1761 XMesaDestroyImage(img); 1762 } 1763 } 1764} 1765 1766 1767 1768PUBLIC void 1769XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer) 1770{ 1771 const GLint b = xbuffer_to_renderbuffer(buffer); 1772 if (b < 0) 1773 return; 1774 1775 /* no-op for now */ 1776} 1777 1778