xm_api.c revision 24d965fab52f790188e5de6e67e7387809b1f145
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 "GL/glxtokens.h" 67#include "GL/xmesa.h" 68#include "xmesaP.h" 69#include "context.h" 70#include "extensions.h" 71#include "framebuffer.h" 72#include "glthread.h" 73#include "imports.h" 74#include "macros.h" 75#include "renderbuffer.h" 76#include "teximage.h" 77#include "swrast/swrast.h" 78#include "swrast_setup/swrast_setup.h" 79#include "vbo/vbo.h" 80#include "tnl/tnl.h" 81#include "tnl/t_context.h" 82#include "tnl/t_pipeline.h" 83#include "drivers/common/driverfuncs.h" 84 85/** 86 * Global X driver lock 87 */ 88_glthread_Mutex _xmesa_lock; 89 90 91 92/** 93 * Lookup tables for HPCR pixel format: 94 */ 95static short hpcr_rgbTbl[3][256] = { 96{ 97 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 98 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 99 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 100 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 101 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 102 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 103 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 104 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 105112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 106128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 107144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 108160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 109176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 110192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 111208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 112224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 113}, 114{ 115 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 116 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 117 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 118 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 119 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 120 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 121 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 122 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 123112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 124128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 125144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 126160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 127176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 128192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 129208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 130224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 131}, 132{ 133 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 134 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 135 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 136 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 137 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 138 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 139 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 140 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 141 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 142112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 143128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 145160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 146176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 147192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 148208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 149} 150}; 151 152 153 154/**********************************************************************/ 155/***** X Utility Functions *****/ 156/**********************************************************************/ 157 158 159/** 160 * Return the host's byte order as LSBFirst or MSBFirst ala X. 161 */ 162#ifndef XFree86Server 163static int host_byte_order( void ) 164{ 165 int i = 1; 166 char *cptr = (char *) &i; 167 return (*cptr==1) ? LSBFirst : MSBFirst; 168} 169#endif 170 171 172/** 173 * Check if the X Shared Memory extension is available. 174 * Return: 0 = not available 175 * 1 = shared XImage support available 176 * 2 = shared Pixmap support available also 177 */ 178static int check_for_xshm( XMesaDisplay *display ) 179{ 180#if defined(USE_XSHM) && !defined(XFree86Server) 181 int major, minor, ignore; 182 Bool pixmaps; 183 184 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 185 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 186 return (pixmaps==True) ? 2 : 1; 187 } 188 else { 189 return 0; 190 } 191 } 192 else { 193 return 0; 194 } 195#else 196 /* No XSHM support */ 197 return 0; 198#endif 199} 200 201 202/** 203 * Apply gamma correction to an intensity value in [0..max]. Return the 204 * new intensity value. 205 */ 206static GLint 207gamma_adjust( GLfloat gamma, GLint value, GLint max ) 208{ 209 if (gamma == 1.0) { 210 return value; 211 } 212 else { 213 double x = (double) value / (double) max; 214 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 215 } 216} 217 218 219 220/** 221 * Return the true number of bits per pixel for XImages. 222 * For example, if we request a 24-bit deep visual we may actually need/get 223 * 32bpp XImages. This function returns the appropriate bpp. 224 * Input: dpy - the X display 225 * visinfo - desribes the visual to be used for XImages 226 * Return: true number of bits per pixel for XImages 227 */ 228static int 229bits_per_pixel( XMesaVisual xmv ) 230{ 231#ifdef XFree86Server 232 const int depth = xmv->nplanes; 233 int i; 234 assert(depth > 0); 235 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 236 if (screenInfo.formats[i].depth == depth) 237 return screenInfo.formats[i].bitsPerPixel; 238 } 239 return depth; /* should never get here, but this should be safe */ 240#else 241 XMesaDisplay *dpy = xmv->display; 242 XMesaVisualInfo visinfo = xmv->visinfo; 243 XMesaImage *img; 244 int bitsPerPixel; 245 /* Create a temporary XImage */ 246 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 247 ZPixmap, 0, /*format, offset*/ 248 (char*) MALLOC(8), /*data*/ 249 1, 1, /*width, height*/ 250 32, /*bitmap_pad*/ 251 0 /*bytes_per_line*/ 252 ); 253 assert(img); 254 /* grab the bits/pixel value */ 255 bitsPerPixel = img->bits_per_pixel; 256 /* free the XImage */ 257 _mesa_free( img->data ); 258 img->data = NULL; 259 XMesaDestroyImage( img ); 260 return bitsPerPixel; 261#endif 262} 263 264 265 266/* 267 * Determine if a given X window ID is valid (window exists). 268 * Do this by calling XGetWindowAttributes() for the window and 269 * checking if we catch an X error. 270 * Input: dpy - the display 271 * win - the window to check for existance 272 * Return: GL_TRUE - window exists 273 * GL_FALSE - window doesn't exist 274 */ 275#ifndef XFree86Server 276static GLboolean WindowExistsFlag; 277 278static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 279{ 280 (void) dpy; 281 if (xerr->error_code == BadWindow) { 282 WindowExistsFlag = GL_FALSE; 283 } 284 return 0; 285} 286 287static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 288{ 289 XWindowAttributes wa; 290 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 291 WindowExistsFlag = GL_TRUE; 292 old_handler = XSetErrorHandler(window_exists_err_handler); 293 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 294 XSetErrorHandler(old_handler); 295 return WindowExistsFlag; 296} 297 298static Status 299get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height ) 300{ 301 Window root; 302 Status stat; 303 int xpos, ypos; 304 unsigned int w, h, bw, depth; 305 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 306 *width = w; 307 *height = h; 308 return stat; 309} 310#endif 311 312 313/** 314 * Return the size of the window (or pixmap) that corresponds to the 315 * given XMesaBuffer. 316 * \param width returns width in pixels 317 * \param height returns height in pixels 318 */ 319void 320xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, 321 GLuint *width, GLuint *height) 322{ 323#ifdef XFree86Server 324 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH); 325 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT); 326#else 327 Status stat; 328 329 _glthread_LOCK_MUTEX(_xmesa_lock); 330 XSync(b->xm_visual->display, 0); /* added for Chromium */ 331 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height); 332 _glthread_UNLOCK_MUTEX(_xmesa_lock); 333 334 if (!stat) { 335 /* probably querying a window that's recently been destroyed */ 336 _mesa_warning(NULL, "XGetGeometry failed!\n"); 337 *width = *height = 1; 338 } 339#endif 340} 341 342 343 344/**********************************************************************/ 345/***** Linked list of XMesaBuffers *****/ 346/**********************************************************************/ 347 348XMesaBuffer XMesaBufferList = NULL; 349 350 351/** 352 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 353 * Note that XMesaBuffer is derived from GLframebuffer. 354 * The new XMesaBuffer will not have any size (Width=Height=0). 355 * 356 * \param d the corresponding X drawable (window or pixmap) 357 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 358 * \param vis the buffer's visual 359 * \param cmap the window's colormap, if known. 360 * \return new XMesaBuffer or NULL if any problem 361 */ 362static XMesaBuffer 363create_xmesa_buffer(XMesaDrawable d, BufferType type, 364 XMesaVisual vis, XMesaColormap cmap) 365{ 366 XMesaBuffer b; 367 368 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 369 370 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 371 if (!b) 372 return NULL; 373 374 b->display = vis->display; 375 b->xm_visual = vis; 376 b->type = type; 377 b->cmap = cmap; 378 379 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 380 b->mesa_buffer.Delete = xmesa_delete_framebuffer; 381 382 /* 383 * Front renderbuffer 384 */ 385 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE); 386 if (!b->frontxrb) { 387 _mesa_free(b); 388 return NULL; 389 } 390 b->frontxrb->Parent = b; 391 b->frontxrb->drawable = d; 392 b->frontxrb->pixmap = (XMesaPixmap) d; 393 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 394 &b->frontxrb->Base); 395 396 /* 397 * Back renderbuffer 398 */ 399 if (vis->mesa_visual.doubleBufferMode) { 400 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE); 401 if (!b->backxrb) { 402 /* XXX free front xrb too */ 403 _mesa_free(b); 404 return NULL; 405 } 406 b->backxrb->Parent = b; 407 /* determine back buffer implementation */ 408 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 409 410 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 411 &b->backxrb->Base); 412 } 413 414 /* 415 * Software alpha planes 416 */ 417 if (vis->mesa_visual.alphaBits > 0 418 && vis->undithered_pf != PF_8A8B8G8R 419 && vis->undithered_pf != PF_8A8R8G8B) { 420 /* Visual has alpha, but pixel format doesn't support it. 421 * We'll use an alpha renderbuffer wrapper. 422 */ 423 b->swAlpha = GL_TRUE; 424 } 425 else { 426 b->swAlpha = GL_FALSE; 427 } 428 429 /* 430 * Other renderbuffer (depth, stencil, etc) 431 */ 432 _mesa_add_soft_renderbuffers(&b->mesa_buffer, 433 GL_FALSE, /* color */ 434 vis->mesa_visual.haveDepthBuffer, 435 vis->mesa_visual.haveStencilBuffer, 436 vis->mesa_visual.haveAccumBuffer, 437 b->swAlpha, 438 vis->mesa_visual.numAuxBuffers > 0 ); 439 440 /* GLX_EXT_texture_from_pixmap */ 441 b->TextureTarget = 0; 442 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 443 b->TextureMipmap = 0; 444 445 /* insert buffer into linked list */ 446 b->Next = XMesaBufferList; 447 XMesaBufferList = b; 448 449 return b; 450} 451 452 453/** 454 * Find an XMesaBuffer by matching X display and colormap but NOT matching 455 * the notThis buffer. 456 */ 457XMesaBuffer 458xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis) 459{ 460 XMesaBuffer b; 461 for (b=XMesaBufferList; b; b=b->Next) { 462 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 463 return b; 464 } 465 } 466 return NULL; 467} 468 469 470/** 471 * Remove buffer from linked list, delete if no longer referenced. 472 */ 473static void 474xmesa_free_buffer(XMesaBuffer buffer) 475{ 476 XMesaBuffer prev = NULL, b; 477 478 for (b = XMesaBufferList; b; b = b->Next) { 479 if (b == buffer) { 480 struct gl_framebuffer *fb = &buffer->mesa_buffer; 481 482 /* unlink buffer from list */ 483 if (prev) 484 prev->Next = buffer->Next; 485 else 486 XMesaBufferList = buffer->Next; 487 488 /* mark as delete pending */ 489 fb->DeletePending = GL_TRUE; 490 491 /* Since the X window for the XMesaBuffer is going away, we don't 492 * want to dereference this pointer in the future. 493 */ 494 b->frontxrb->drawable = 0; 495 496 /* Unreference. If count = zero we'll really delete the buffer */ 497 _mesa_unreference_framebuffer(&fb); 498 499 return; 500 } 501 /* continue search */ 502 prev = b; 503 } 504 /* buffer not found in XMesaBufferList */ 505 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 506} 507 508 509/** 510 * Copy X color table stuff from one XMesaBuffer to another. 511 */ 512static void 513copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 514{ 515 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 516 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 517 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 518 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 519 dst->num_alloced = src->num_alloced; 520 MEMCPY(dst->alloced_colors, src->alloced_colors, 521 sizeof(src->alloced_colors)); 522} 523 524 525 526/**********************************************************************/ 527/***** Misc Private Functions *****/ 528/**********************************************************************/ 529 530 531/** 532 * A replacement for XAllocColor. This function should never 533 * fail to allocate a color. When XAllocColor fails, we return 534 * the nearest matching color. If we have to allocate many colors 535 * this function isn't too efficient; the XQueryColors() could be 536 * done just once. 537 * Written by Michael Pichler, Brian Paul, Mark Kilgard 538 * Input: dpy - X display 539 * cmap - X colormap 540 * cmapSize - size of colormap 541 * In/Out: color - the XColor struct 542 * Output: exact - 1=exact color match, 0=closest match 543 * alloced - 1=XAlloc worked, 0=XAlloc failed 544 */ 545static void 546noFaultXAllocColor( int client, 547 XMesaDisplay *dpy, 548 XMesaColormap cmap, 549 int cmapSize, 550 XMesaColor *color, 551 int *exact, int *alloced ) 552{ 553#ifdef XFree86Server 554 Pixel *ppixIn; 555 xrgb *ctable; 556#else 557 /* we'll try to cache ctable for better remote display performance */ 558 static Display *prevDisplay = NULL; 559 static XMesaColormap prevCmap = 0; 560 static int prevCmapSize = 0; 561 static XMesaColor *ctable = NULL; 562#endif 563 XMesaColor subColor; 564 int i, bestmatch; 565 double mindist; /* 3*2^16^2 exceeds long int precision. */ 566 567 (void) client; 568 569 /* First try just using XAllocColor. */ 570#ifdef XFree86Server 571 if (AllocColor(cmap, 572 &color->red, &color->green, &color->blue, 573 &color->pixel, 574 client) == Success) 575#else 576 if (XAllocColor(dpy, cmap, color)) 577#endif 578 { 579 *exact = 1; 580 *alloced = 1; 581 return; 582 } 583 584 /* Alloc failed, search for closest match */ 585 586 /* Retrieve color table entries. */ 587 /* XXX alloca candidate. */ 588#ifdef XFree86Server 589 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 590 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 591 for (i = 0; i < cmapSize; i++) { 592 ppixIn[i] = i; 593 } 594 QueryColors(cmap, cmapSize, ppixIn, ctable); 595#else 596 if (prevDisplay != dpy || prevCmap != cmap 597 || prevCmapSize != cmapSize || !ctable) { 598 /* free previously cached color table */ 599 if (ctable) 600 _mesa_free(ctable); 601 /* Get the color table from X */ 602 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 603 assert(ctable); 604 for (i = 0; i < cmapSize; i++) { 605 ctable[i].pixel = i; 606 } 607 XQueryColors(dpy, cmap, ctable, cmapSize); 608 prevDisplay = dpy; 609 prevCmap = cmap; 610 prevCmapSize = cmapSize; 611 } 612#endif 613 614 /* Find best match. */ 615 bestmatch = -1; 616 mindist = 0.0; 617 for (i = 0; i < cmapSize; i++) { 618 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 619 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 620 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 621 double dist = dr * dr + dg * dg + db * db; 622 if (bestmatch < 0 || dist < mindist) { 623 bestmatch = i; 624 mindist = dist; 625 } 626 } 627 628 /* Return result. */ 629 subColor.red = ctable[bestmatch].red; 630 subColor.green = ctable[bestmatch].green; 631 subColor.blue = ctable[bestmatch].blue; 632 /* Try to allocate the closest match color. This should only 633 * fail if the cell is read/write. Otherwise, we're incrementing 634 * the cell's reference count. 635 */ 636#ifdef XFree86Server 637 if (AllocColor(cmap, 638 &subColor.red, &subColor.green, &subColor.blue, 639 &subColor.pixel, 640 client) == Success) { 641#else 642 if (XAllocColor(dpy, cmap, &subColor)) { 643#endif 644 *alloced = 1; 645 } 646 else { 647 /* do this to work around a problem reported by Frank Ortega */ 648 subColor.pixel = (unsigned long) bestmatch; 649 subColor.red = ctable[bestmatch].red; 650 subColor.green = ctable[bestmatch].green; 651 subColor.blue = ctable[bestmatch].blue; 652 subColor.flags = DoRed | DoGreen | DoBlue; 653 *alloced = 0; 654 } 655#ifdef XFree86Server 656 _mesa_free(ppixIn); 657 _mesa_free(ctable); 658#else 659 /* don't free table, save it for next time */ 660#endif 661 662 *color = subColor; 663 *exact = 0; 664} 665 666 667 668/** 669 * Do setup for PF_GRAYSCALE pixel format. 670 * Note that buffer may be NULL. 671 */ 672static GLboolean 673setup_grayscale(int client, XMesaVisual v, 674 XMesaBuffer buffer, XMesaColormap cmap) 675{ 676 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 677 return GL_FALSE; 678 } 679 680 if (buffer) { 681 XMesaBuffer prevBuffer; 682 683 if (!cmap) { 684 return GL_FALSE; 685 } 686 687 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 688 if (prevBuffer && 689 (buffer->xm_visual->mesa_visual.rgbMode == 690 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 691 /* Copy colormap stuff from previous XMesaBuffer which uses same 692 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 693 */ 694 copy_colortable_info(buffer, prevBuffer); 695 } 696 else { 697 /* Allocate 256 shades of gray */ 698 int gray; 699 int colorsfailed = 0; 700 for (gray=0;gray<256;gray++) { 701 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 702 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 703 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 704 int exact, alloced; 705 XMesaColor xcol; 706 xcol.red = (r << 8) | r; 707 xcol.green = (g << 8) | g; 708 xcol.blue = (b << 8) | b; 709 noFaultXAllocColor( client, v->display, 710 cmap, GET_COLORMAP_SIZE(v), 711 &xcol, &exact, &alloced ); 712 if (!exact) { 713 colorsfailed++; 714 } 715 if (alloced) { 716 assert(buffer->num_alloced<256); 717 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 718 buffer->num_alloced++; 719 } 720 721 /*OLD 722 assert(gray < 576); 723 buffer->color_table[gray*3+0] = xcol.pixel; 724 buffer->color_table[gray*3+1] = xcol.pixel; 725 buffer->color_table[gray*3+2] = xcol.pixel; 726 assert(xcol.pixel < 65536); 727 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 728 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 729 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 730 */ 731 buffer->color_table[gray] = xcol.pixel; 732 assert(xcol.pixel < 65536); 733 buffer->pixel_to_r[xcol.pixel] = gray; 734 buffer->pixel_to_g[xcol.pixel] = gray; 735 buffer->pixel_to_b[xcol.pixel] = gray; 736 } 737 738 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 739 _mesa_warning(NULL, 740 "Note: %d out of 256 needed colors do not match exactly.\n", 741 colorsfailed ); 742 } 743 } 744 } 745 746 v->dithered_pf = PF_Grayscale; 747 v->undithered_pf = PF_Grayscale; 748 return GL_TRUE; 749} 750 751 752 753/** 754 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 755 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 756 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 757 * color. While this function was originally designed just for 8-bit 758 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 759 * Dithering code contributed by Bob Mercier. 760 */ 761static GLboolean 762setup_dithered_color(int client, XMesaVisual v, 763 XMesaBuffer buffer, XMesaColormap cmap) 764{ 765 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 766 return GL_FALSE; 767 } 768 769 if (buffer) { 770 XMesaBuffer prevBuffer; 771 772 if (!cmap) { 773 return GL_FALSE; 774 } 775 776 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 777 if (prevBuffer && 778 (buffer->xm_visual->mesa_visual.rgbMode == 779 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 780 /* Copy colormap stuff from previous, matching XMesaBuffer. 781 * Do this to avoid time spent in noFaultXAllocColor. 782 */ 783 copy_colortable_info(buffer, prevBuffer); 784 } 785 else { 786 /* Allocate X colors and initialize color_table[], red_table[], etc */ 787 int r, g, b, i; 788 int colorsfailed = 0; 789 for (r = 0; r < DITH_R; r++) { 790 for (g = 0; g < DITH_G; g++) { 791 for (b = 0; b < DITH_B; b++) { 792 XMesaColor xcol; 793 int exact, alloced; 794 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 795 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 796 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 797 noFaultXAllocColor( client, v->display, 798 cmap, GET_COLORMAP_SIZE(v), 799 &xcol, &exact, &alloced ); 800 if (!exact) { 801 colorsfailed++; 802 } 803 if (alloced) { 804 assert(buffer->num_alloced<256); 805 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 806 buffer->num_alloced++; 807 } 808 i = DITH_MIX( r, g, b ); 809 assert(i < 576); 810 buffer->color_table[i] = xcol.pixel; 811 assert(xcol.pixel < 65536); 812 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 813 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 814 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 815 } 816 } 817 } 818 819 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 820 _mesa_warning(NULL, 821 "Note: %d out of %d needed colors do not match exactly.\n", 822 colorsfailed, DITH_R * DITH_G * DITH_B ); 823 } 824 } 825 } 826 827 v->dithered_pf = PF_Dither; 828 v->undithered_pf = PF_Lookup; 829 return GL_TRUE; 830} 831 832 833/** 834 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 835 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 836 * Special dithering tables have to be initialized. 837 */ 838static void 839setup_8bit_hpcr(XMesaVisual v) 840{ 841 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 842 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 843 * on the root window AND the colormap obtainable by XGetRGBColormaps 844 * for that atom must be set on the window. (see also tkInitWindow) 845 * If that colormap is not set, the output will look stripy. 846 */ 847 848 /* Setup color tables with gamma correction */ 849 int i; 850 double g; 851 852 g = 1.0 / v->RedGamma; 853 for (i=0; i<256; i++) { 854 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 855 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 856 } 857 858 g = 1.0 / v->GreenGamma; 859 for (i=0; i<256; i++) { 860 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 861 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 862 } 863 864 g = 1.0 / v->BlueGamma; 865 for (i=0; i<256; i++) { 866 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 867 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 868 } 869 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 870 v->dithered_pf = PF_HPCR; 871 872 /* which method should I use to clear */ 873 /* GL_FALSE: keep the ordinary method */ 874 /* GL_TRUE : clear with dither pattern */ 875 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 876 877 if (v->hpcr_clear_flag) { 878 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 879 DefaultRootWindow(v->display), 880 16, 2, 8); 881#ifndef XFree86Server 882 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 883 0, 0, 16, 2, AllPlanes, ZPixmap); 884#endif 885 } 886} 887 888 889/** 890 * Setup RGB rendering for a window with a True/DirectColor visual. 891 */ 892static void 893setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) 894{ 895 unsigned long rmask, gmask, bmask; 896 (void) buffer; 897 (void) cmap; 898 899 /* Compute red multiplier (mask) and bit shift */ 900 v->rshift = 0; 901 rmask = GET_REDMASK(v); 902 while ((rmask & 1)==0) { 903 v->rshift++; 904 rmask = rmask >> 1; 905 } 906 907 /* Compute green multiplier (mask) and bit shift */ 908 v->gshift = 0; 909 gmask = GET_GREENMASK(v); 910 while ((gmask & 1)==0) { 911 v->gshift++; 912 gmask = gmask >> 1; 913 } 914 915 /* Compute blue multiplier (mask) and bit shift */ 916 v->bshift = 0; 917 bmask = GET_BLUEMASK(v); 918 while ((bmask & 1)==0) { 919 v->bshift++; 920 bmask = bmask >> 1; 921 } 922 923 /* 924 * Compute component-to-pixel lookup tables and dithering kernel 925 */ 926 { 927 static GLubyte kernel[16] = { 928 0*16, 8*16, 2*16, 10*16, 929 12*16, 4*16, 14*16, 6*16, 930 3*16, 11*16, 1*16, 9*16, 931 15*16, 7*16, 13*16, 5*16, 932 }; 933 GLint rBits = _mesa_bitcount(rmask); 934 GLint gBits = _mesa_bitcount(gmask); 935 GLint bBits = _mesa_bitcount(bmask); 936 GLint maxBits; 937 GLuint i; 938 939 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 940 for (i=0; i<=rmask; i++) 941 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 942 for (i=0; i<=gmask; i++) 943 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 944 for (i=0; i<=bmask; i++) 945 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 946 947 /* convert RGB values from [0,255] to pixel components */ 948 949 for (i=0;i<256;i++) { 950 GLint r = gamma_adjust(v->RedGamma, i, 255); 951 GLint g = gamma_adjust(v->GreenGamma, i, 255); 952 GLint b = gamma_adjust(v->BlueGamma, i, 255); 953 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 954 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 955 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 956 } 957 /* overflow protection */ 958 for (i=256;i<512;i++) { 959 v->RtoPixel[i] = v->RtoPixel[255]; 960 v->GtoPixel[i] = v->GtoPixel[255]; 961 v->BtoPixel[i] = v->BtoPixel[255]; 962 } 963 964 /* setup dithering kernel */ 965 maxBits = rBits; 966 if (gBits > maxBits) maxBits = gBits; 967 if (bBits > maxBits) maxBits = bBits; 968 for (i=0;i<16;i++) { 969 v->Kernel[i] = kernel[i] >> maxBits; 970 } 971 972 v->undithered_pf = PF_Truecolor; 973 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 974 } 975 976 /* 977 * Now check for TrueColor visuals which we can optimize. 978 */ 979 if ( GET_REDMASK(v) ==0x0000ff 980 && GET_GREENMASK(v)==0x00ff00 981 && GET_BLUEMASK(v) ==0xff0000 982 && CHECK_BYTE_ORDER(v) 983 && v->BitsPerPixel==32 984 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 985 /* common 32 bpp config used on SGI, Sun */ 986 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ 987 } 988 else if (GET_REDMASK(v) == 0xff0000 989 && GET_GREENMASK(v)== 0x00ff00 990 && GET_BLUEMASK(v) == 0x0000ff 991 && CHECK_BYTE_ORDER(v) 992 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ 993 if (v->BitsPerPixel==32) { 994 /* if 32 bpp, and visual indicates 8 bpp alpha channel */ 995 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) 996 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ 997 else 998 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ 999 } 1000 else if (v->BitsPerPixel == 24) { 1001 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ 1002 } 1003 } 1004 else if (GET_REDMASK(v) ==0xf800 1005 && GET_GREENMASK(v)==0x07e0 1006 && GET_BLUEMASK(v) ==0x001f 1007 && CHECK_BYTE_ORDER(v) 1008 && v->BitsPerPixel==16 1009 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1010 /* 5-6-5 RGB */ 1011 v->undithered_pf = PF_5R6G5B; 1012 v->dithered_pf = PF_Dither_5R6G5B; 1013 } 1014 else if (GET_REDMASK(v) ==0xe0 1015 && GET_GREENMASK(v)==0x1c 1016 && GET_BLUEMASK(v) ==0x03 1017 && CHECK_FOR_HPCR(v)) { 1018 /* 8-bit HP color recovery */ 1019 setup_8bit_hpcr( v ); 1020 } 1021} 1022 1023 1024 1025/** 1026 * Setup RGB rendering for a window with a monochrome visual. 1027 */ 1028static void 1029setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1030{ 1031 (void) b; 1032 v->dithered_pf = v->undithered_pf = PF_1Bit; 1033 /* if black=1 then we must flip pixel values */ 1034 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1035} 1036 1037 1038 1039/** 1040 * When a context is bound for the first time, we can finally finish 1041 * initializing the context's visual and buffer information. 1042 * \param v the XMesaVisual to initialize 1043 * \param b the XMesaBuffer to initialize (may be NULL) 1044 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 1045 * \param window the window/pixmap we're rendering into 1046 * \param cmap the colormap associated with the window/pixmap 1047 * \return GL_TRUE=success, GL_FALSE=failure 1048 */ 1049static GLboolean 1050initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 1051 GLboolean rgb_flag, XMesaDrawable window, 1052 XMesaColormap cmap) 1053{ 1054 int client = 0; 1055 1056#ifdef XFree86Server 1057 client = (window) ? CLIENT_ID(window->id) : 0; 1058#endif 1059 1060 ASSERT(!b || b->xm_visual == v); 1061 1062 /* Save true bits/pixel */ 1063 v->BitsPerPixel = bits_per_pixel(v); 1064 assert(v->BitsPerPixel > 0); 1065 1066 if (rgb_flag == GL_FALSE) { 1067 /* COLOR-INDEXED WINDOW: 1068 * Even if the visual is TrueColor or DirectColor we treat it as 1069 * being color indexed. This is weird but might be useful to someone. 1070 */ 1071 v->dithered_pf = v->undithered_pf = PF_Index; 1072 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1073 } 1074 else { 1075 /* RGB WINDOW: 1076 * We support RGB rendering into almost any kind of visual. 1077 */ 1078 const int xclass = v->mesa_visual.visualType; 1079 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1080 setup_truecolor( v, b, cmap ); 1081 } 1082 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { 1083 setup_monochrome( v, b ); 1084 } 1085 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { 1086 if (!setup_grayscale( client, v, b, cmap )) { 1087 return GL_FALSE; 1088 } 1089 } 1090 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) 1091 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1092 if (!setup_dithered_color( client, v, b, cmap )) { 1093 return GL_FALSE; 1094 } 1095 } 1096 else { 1097 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 1098 return GL_FALSE; 1099 } 1100 v->mesa_visual.indexBits = 0; 1101 1102 if (_mesa_getenv("MESA_NO_DITHER")) { 1103 v->dithered_pf = v->undithered_pf; 1104 } 1105 } 1106 1107 1108 /* 1109 * If MESA_INFO env var is set print out some debugging info 1110 * which can help Brian figure out what's going on when a user 1111 * reports bugs. 1112 */ 1113 if (_mesa_getenv("MESA_INFO")) { 1114 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1115 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1116 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1117 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1118 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1119 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1120 } 1121 1122 if (b && window) { 1123 char *data; 1124 1125 /* Do window-specific initializations */ 1126 1127 /* these should have been set in create_xmesa_buffer */ 1128 ASSERT(b->frontxrb->drawable == window); 1129 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 1130 1131 /* Setup for single/double buffering */ 1132 if (v->mesa_visual.doubleBufferMode) { 1133 /* Double buffered */ 1134 b->shm = check_for_xshm( v->display ); 1135 } 1136 1137 /* X11 graphics contexts */ 1138#ifdef XFree86Server 1139 b->gc = CreateScratchGC(v->display, window->depth); 1140#else 1141 b->gc = XCreateGC( v->display, window, 0, NULL ); 1142#endif 1143 XMesaSetFunction( v->display, b->gc, GXcopy ); 1144 1145 /* cleargc - for glClear() */ 1146#ifdef XFree86Server 1147 b->cleargc = CreateScratchGC(v->display, window->depth); 1148#else 1149 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1150#endif 1151 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1152 1153 /* 1154 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1155 * Patch contributed by Michael Pichler May 15, 1995. 1156 */ 1157#ifdef XFree86Server 1158 b->swapgc = CreateScratchGC(v->display, window->depth); 1159 { 1160 CARD32 v[1]; 1161 v[0] = FALSE; 1162 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1163 } 1164#else 1165 { 1166 XGCValues gcvalues; 1167 gcvalues.graphics_exposures = False; 1168 b->swapgc = XCreateGC(v->display, window, 1169 GCGraphicsExposures, &gcvalues); 1170 } 1171#endif 1172 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1173 /* 1174 * Set fill style and tile pixmap once for all for HPCR stuff 1175 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1176 * Initialize whole stuff 1177 * Patch contributed by Jacques Leroy March 8, 1998. 1178 */ 1179 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { 1180 int i; 1181 for (i = 0; i < 16; i++) { 1182 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1183 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1184 } 1185 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1186 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1187 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1188 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1189 } 1190 1191 /* Initialize the row buffer XImage for use in write_color_span() */ 1192 data = (char*) MALLOC(MAX_WIDTH*4); 1193#ifdef XFree86Server 1194 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data); 1195#else 1196 b->rowimage = XCreateImage( v->display, 1197 v->visinfo->visual, 1198 v->visinfo->depth, 1199 ZPixmap, 0, /*format, offset*/ 1200 data, /*data*/ 1201 MAX_WIDTH, 1, /*width, height*/ 1202 32, /*bitmap_pad*/ 1203 0 /*bytes_per_line*/ ); 1204#endif 1205 if (!b->rowimage) 1206 return GL_FALSE; 1207 } 1208 1209 return GL_TRUE; 1210} 1211 1212 1213 1214/* 1215 * Convert an RGBA color to a pixel value. 1216 */ 1217unsigned long 1218xmesa_color_to_pixel(GLcontext *ctx, 1219 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1220 GLuint pixelFormat) 1221{ 1222 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1223 switch (pixelFormat) { 1224 case PF_Index: 1225 return 0; 1226 case PF_Truecolor: 1227 { 1228 unsigned long p; 1229 PACK_TRUECOLOR( p, r, g, b ); 1230 return p; 1231 } 1232 case PF_8A8B8G8R: 1233 return PACK_8A8B8G8R( r, g, b, a ); 1234 case PF_8A8R8G8B: 1235 return PACK_8A8R8G8B( r, g, b, a ); 1236 case PF_8R8G8B: 1237 /* fall through */ 1238 case PF_8R8G8B24: 1239 return PACK_8R8G8B( r, g, b ); 1240 case PF_5R6G5B: 1241 return PACK_5R6G5B( r, g, b ); 1242 case PF_Dither: 1243 { 1244 DITHER_SETUP; 1245 return DITHER( 1, 0, r, g, b ); 1246 } 1247 case PF_1Bit: 1248 /* 382 = (3*255)/2 */ 1249 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1250 case PF_HPCR: 1251 return DITHER_HPCR(1, 1, r, g, b); 1252 case PF_Lookup: 1253 { 1254 LOOKUP_SETUP; 1255 return LOOKUP( r, g, b ); 1256 } 1257 case PF_Grayscale: 1258 return GRAY_RGB( r, g, b ); 1259 case PF_Dither_True: 1260 /* fall through */ 1261 case PF_Dither_5R6G5B: 1262 { 1263 unsigned long p; 1264 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1265 return p; 1266 } 1267 default: 1268 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1269 } 1270 return 0; 1271} 1272 1273 1274#define NUM_VISUAL_TYPES 6 1275 1276/** 1277 * Convert an X visual type to a GLX visual type. 1278 * 1279 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1280 * to be converted. 1281 * \return If \c visualType is a valid X visual type, a GLX visual type will 1282 * be returned. Otherwise \c GLX_NONE will be returned. 1283 * 1284 * \note 1285 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1286 * DRI CVS tree. 1287 */ 1288static GLint 1289xmesa_convert_from_x_visual_type( int visualType ) 1290{ 1291 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1292 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1293 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1294 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1295 }; 1296 1297 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1298 ? glx_visual_types[ visualType ] : GLX_NONE; 1299} 1300 1301 1302/**********************************************************************/ 1303/***** Public Functions *****/ 1304/**********************************************************************/ 1305 1306 1307/* 1308 * Create a new X/Mesa visual. 1309 * Input: display - X11 display 1310 * visinfo - an XVisualInfo pointer 1311 * rgb_flag - GL_TRUE = RGB mode, 1312 * GL_FALSE = color index mode 1313 * alpha_flag - alpha buffer requested? 1314 * db_flag - GL_TRUE = double-buffered, 1315 * GL_FALSE = single buffered 1316 * stereo_flag - stereo visual? 1317 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1318 * GL_FALSE = use an off-screen pixmap for back buffer 1319 * depth_size - requested bits/depth values, or zero 1320 * stencil_size - requested bits/stencil values, or zero 1321 * accum_red_size - requested bits/red accum values, or zero 1322 * accum_green_size - requested bits/green accum values, or zero 1323 * accum_blue_size - requested bits/blue accum values, or zero 1324 * accum_alpha_size - requested bits/alpha accum values, or zero 1325 * num_samples - number of samples/pixel if multisampling, or zero 1326 * level - visual level, usually 0 1327 * visualCaveat - ala the GLX extension, usually GLX_NONE 1328 * Return; a new XMesaVisual or 0 if error. 1329 */ 1330PUBLIC 1331XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1332 XMesaVisualInfo visinfo, 1333 GLboolean rgb_flag, 1334 GLboolean alpha_flag, 1335 GLboolean db_flag, 1336 GLboolean stereo_flag, 1337 GLboolean ximage_flag, 1338 GLint depth_size, 1339 GLint stencil_size, 1340 GLint accum_red_size, 1341 GLint accum_green_size, 1342 GLint accum_blue_size, 1343 GLint accum_alpha_size, 1344 GLint num_samples, 1345 GLint level, 1346 GLint visualCaveat ) 1347{ 1348 char *gamma; 1349 XMesaVisual v; 1350 GLint red_bits, green_bits, blue_bits, alpha_bits; 1351 1352#ifndef XFree86Server 1353 /* For debugging only */ 1354 if (_mesa_getenv("MESA_XSYNC")) { 1355 /* This makes debugging X easier. 1356 * In your debugger, set a breakpoint on _XError to stop when an 1357 * X protocol error is generated. 1358 */ 1359 XSynchronize( display, 1 ); 1360 } 1361#endif 1362 1363 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1364 if (!v) { 1365 return NULL; 1366 } 1367 1368 v->display = display; 1369 1370 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 1371 * the struct but we may need some of the information contained in it 1372 * at a later time. 1373 */ 1374#ifndef XFree86Server 1375 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1376 if(!v->visinfo) { 1377 _mesa_free(v); 1378 return NULL; 1379 } 1380 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1381#endif 1382 1383 /* check for MESA_GAMMA environment variable */ 1384 gamma = _mesa_getenv("MESA_GAMMA"); 1385 if (gamma) { 1386 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1387 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1388 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1389 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1390 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1391 } 1392 else { 1393 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1394 } 1395 1396 v->ximage_flag = ximage_flag; 1397 1398#ifdef XFree86Server 1399 /* We could calculate these values by ourselves. nplanes is either the sum 1400 * of the red, green, and blue bits or the number index bits. 1401 * ColormapEntries is either (1U << index_bits) or 1402 * (1U << max(redBits, greenBits, blueBits)). 1403 */ 1404 assert(visinfo->nplanes > 0); 1405 v->nplanes = visinfo->nplanes; 1406 v->ColormapEntries = visinfo->ColormapEntries; 1407 1408 v->mesa_visual.redMask = visinfo->redMask; 1409 v->mesa_visual.greenMask = visinfo->greenMask; 1410 v->mesa_visual.blueMask = visinfo->blueMask; 1411 v->mesa_visual.visualID = visinfo->vid; 1412 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1413#else 1414 v->mesa_visual.redMask = visinfo->red_mask; 1415 v->mesa_visual.greenMask = visinfo->green_mask; 1416 v->mesa_visual.blueMask = visinfo->blue_mask; 1417 v->mesa_visual.visualID = visinfo->visualid; 1418 v->mesa_visual.screen = visinfo->screen; 1419#endif 1420 1421#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1422 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1423#else 1424 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1425#endif 1426 1427 v->mesa_visual.visualRating = visualCaveat; 1428 1429 if (alpha_flag) 1430 v->mesa_visual.alphaBits = 8; 1431 1432 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 1433 1434 { 1435 const int xclass = v->mesa_visual.visualType; 1436 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1437 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1438 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1439 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1440 } 1441 else { 1442 /* this is an approximation */ 1443 int depth; 1444 depth = GET_VISUAL_DEPTH(v); 1445 red_bits = depth / 3; 1446 depth -= red_bits; 1447 green_bits = depth / 2; 1448 depth -= green_bits; 1449 blue_bits = depth; 1450 alpha_bits = 0; 1451 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1452 } 1453 alpha_bits = v->mesa_visual.alphaBits; 1454 } 1455 1456 _mesa_initialize_visual( &v->mesa_visual, 1457 rgb_flag, db_flag, stereo_flag, 1458 red_bits, green_bits, 1459 blue_bits, alpha_bits, 1460 v->mesa_visual.indexBits, 1461 depth_size, 1462 stencil_size, 1463 accum_red_size, accum_green_size, 1464 accum_blue_size, accum_alpha_size, 1465 0 ); 1466 1467 /* XXX minor hack */ 1468 v->mesa_visual.level = level; 1469 return v; 1470} 1471 1472 1473PUBLIC 1474void XMesaDestroyVisual( XMesaVisual v ) 1475{ 1476#ifndef XFree86Server 1477 _mesa_free(v->visinfo); 1478#endif 1479 _mesa_free(v); 1480} 1481 1482 1483 1484/** 1485 * Create a new XMesaContext. 1486 * \param v the XMesaVisual 1487 * \param share_list another XMesaContext with which to share display 1488 * lists or NULL if no sharing is wanted. 1489 * \return an XMesaContext or NULL if error. 1490 */ 1491PUBLIC 1492XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1493{ 1494 static GLboolean firstTime = GL_TRUE; 1495 XMesaContext c; 1496 GLcontext *mesaCtx; 1497 struct dd_function_table functions; 1498 TNLcontext *tnl; 1499 1500 if (firstTime) { 1501 _glthread_INIT_MUTEX(_xmesa_lock); 1502 firstTime = GL_FALSE; 1503 } 1504 1505 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1506 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1507 if (!c) 1508 return NULL; 1509 1510 mesaCtx = &(c->mesa); 1511 1512 /* initialize with default driver functions, then plug in XMesa funcs */ 1513 _mesa_init_driver_functions(&functions); 1514 xmesa_init_driver_functions(v, &functions); 1515 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1516 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1517 &functions, (void *) c)) { 1518 _mesa_free(c); 1519 return NULL; 1520 } 1521 1522 _mesa_enable_sw_extensions(mesaCtx); 1523 _mesa_enable_1_3_extensions(mesaCtx); 1524 _mesa_enable_1_4_extensions(mesaCtx); 1525 _mesa_enable_1_5_extensions(mesaCtx); 1526 _mesa_enable_2_0_extensions(mesaCtx); 1527#if ENABLE_EXT_texure_compression_s3tc 1528 if (c->Mesa_DXTn) { 1529 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1530 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1531 } 1532 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1533#endif 1534#if ENABLE_EXT_timer_query 1535 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1536#endif 1537 1538#ifdef XFree86Server 1539 /* If we're running in the X server, do bounds checking to prevent 1540 * segfaults and server crashes! 1541 */ 1542 mesaCtx->Const.CheckArrayBounds = GL_TRUE; 1543#endif 1544 1545 /* finish up xmesa context initializations */ 1546 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1547 c->xm_visual = v; 1548 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1549 c->display = v->display; 1550 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1551 1552 /* Initialize the software rasterizer and helper modules. 1553 */ 1554 if (!_swrast_CreateContext( mesaCtx ) || 1555 !_vbo_CreateContext( mesaCtx ) || 1556 !_tnl_CreateContext( mesaCtx ) || 1557 !_swsetup_CreateContext( mesaCtx )) { 1558 _mesa_free_context_data(&c->mesa); 1559 _mesa_free(c); 1560 return NULL; 1561 } 1562 1563 /* tnl setup */ 1564 tnl = TNL_CONTEXT(mesaCtx); 1565 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1566 /* swrast setup */ 1567 xmesa_register_swrast_functions( mesaCtx ); 1568 _swsetup_Wakeup(mesaCtx); 1569 1570 return c; 1571} 1572 1573 1574 1575PUBLIC 1576void XMesaDestroyContext( XMesaContext c ) 1577{ 1578 GLcontext *mesaCtx = &c->mesa; 1579 1580#ifdef FX 1581 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) ); 1582#endif 1583 1584 _swsetup_DestroyContext( mesaCtx ); 1585 _swrast_DestroyContext( mesaCtx ); 1586 _tnl_DestroyContext( mesaCtx ); 1587 _vbo_DestroyContext( mesaCtx ); 1588 _mesa_free_context_data( mesaCtx ); 1589 _mesa_free( c ); 1590} 1591 1592 1593 1594/** 1595 * Private function for creating an XMesaBuffer which corresponds to an 1596 * X window or pixmap. 1597 * \param v the window's XMesaVisual 1598 * \param w the window we're wrapping 1599 * \return new XMesaBuffer or NULL if error 1600 */ 1601PUBLIC XMesaBuffer 1602XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1603{ 1604#ifndef XFree86Server 1605 XWindowAttributes attr; 1606#endif 1607 XMesaBuffer b; 1608 XMesaColormap cmap; 1609 int depth; 1610 1611 assert(v); 1612 assert(w); 1613 1614 /* Check that window depth matches visual depth */ 1615#ifdef XFree86Server 1616 depth = ((XMesaDrawable)w)->depth; 1617#else 1618 XGetWindowAttributes( v->display, w, &attr ); 1619 depth = attr.depth; 1620#endif 1621 if (GET_VISUAL_DEPTH(v) != depth) { 1622 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1623 GET_VISUAL_DEPTH(v), depth); 1624 return NULL; 1625 } 1626 1627 /* Find colormap */ 1628#ifdef XFree86Server 1629 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1630#else 1631 if (attr.colormap) { 1632 cmap = attr.colormap; 1633 } 1634 else { 1635 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1636 /* this is weird, a window w/out a colormap!? */ 1637 /* OK, let's just allocate a new one and hope for the best */ 1638 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1639 } 1640#endif 1641 1642 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1643 if (!b) 1644 return NULL; 1645 1646 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 1647 (XMesaDrawable) w, cmap )) { 1648 xmesa_free_buffer(b); 1649 return NULL; 1650 } 1651 1652 return b; 1653} 1654 1655 1656 1657/** 1658 * Create a new XMesaBuffer from an X pixmap. 1659 * 1660 * \param v the XMesaVisual 1661 * \param p the pixmap 1662 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1663 * \c GLX_DIRECT_COLOR visual for the pixmap 1664 * \returns new XMesaBuffer or NULL if error 1665 */ 1666PUBLIC XMesaBuffer 1667XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1668{ 1669 XMesaBuffer b; 1670 1671 assert(v); 1672 1673 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1674 if (!b) 1675 return NULL; 1676 1677 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1678 (XMesaDrawable) p, cmap)) { 1679 xmesa_free_buffer(b); 1680 return NULL; 1681 } 1682 1683 return b; 1684} 1685 1686 1687/** 1688 * For GLX_EXT_texture_from_pixmap 1689 */ 1690XMesaBuffer 1691XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p, 1692 XMesaColormap cmap, 1693 int format, int target, int mipmap) 1694{ 1695 GET_CURRENT_CONTEXT(ctx); 1696 XMesaBuffer b; 1697 GLuint width, height; 1698 1699 assert(v); 1700 1701 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1702 if (!b) 1703 return NULL; 1704 1705 /* get pixmap size, update framebuffer/renderbuffer dims */ 1706 xmesa_get_window_size(v->display, b, &width, &height); 1707 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height); 1708 1709 if (target == 0) { 1710 /* examine dims */ 1711 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1712 target = GLX_TEXTURE_2D_EXT; 1713 } 1714 else if ( _mesa_bitcount(width) == 1 1715 && _mesa_bitcount(height) == 1) { 1716 /* power of two size */ 1717 if (height == 1) { 1718 target = GLX_TEXTURE_1D_EXT; 1719 } 1720 else { 1721 target = GLX_TEXTURE_2D_EXT; 1722 } 1723 } 1724 else if (ctx->Extensions.NV_texture_rectangle) { 1725 target = GLX_TEXTURE_RECTANGLE_EXT; 1726 } 1727 else { 1728 /* non power of two textures not supported */ 1729 XMesaDestroyBuffer(b); 1730 return 0; 1731 } 1732 } 1733 1734 b->TextureTarget = target; 1735 b->TextureFormat = format; 1736 b->TextureMipmap = mipmap; 1737 1738 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1739 (XMesaDrawable) p, cmap)) { 1740 xmesa_free_buffer(b); 1741 return NULL; 1742 } 1743 1744 return b; 1745} 1746 1747 1748 1749XMesaBuffer 1750XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1751 unsigned int width, unsigned int height) 1752{ 1753#ifndef XFree86Server 1754 XMesaWindow root; 1755 XMesaDrawable drawable; /* X Pixmap Drawable */ 1756 XMesaBuffer b; 1757 1758 /* allocate pixmap for front buffer */ 1759 root = RootWindow( v->display, v->visinfo->screen ); 1760 drawable = XCreatePixmap(v->display, root, width, height, 1761 v->visinfo->depth); 1762 if (!drawable) 1763 return NULL; 1764 1765 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1766 if (!b) 1767 return NULL; 1768 1769 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1770 drawable, cmap)) { 1771 xmesa_free_buffer(b); 1772 return NULL; 1773 } 1774 1775 return b; 1776#else 1777 return 0; 1778#endif 1779} 1780 1781 1782 1783/* 1784 * Deallocate an XMesaBuffer structure and all related info. 1785 */ 1786PUBLIC void 1787XMesaDestroyBuffer(XMesaBuffer b) 1788{ 1789 xmesa_free_buffer(b); 1790} 1791 1792 1793/** 1794 * Query the current window size and update the corresponding GLframebuffer 1795 * and all attached renderbuffers. 1796 * Called when: 1797 * 1. the first time a buffer is bound to a context. 1798 * 2. from glViewport to poll for window size changes 1799 * 3. from the XMesaResizeBuffers() API function. 1800 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1801 * when resizing a buffer when no rendering context is bound. 1802 */ 1803void 1804xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1805{ 1806 GLuint width, height; 1807 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1808 if (drawBuffer->mesa_buffer.Width != width || 1809 drawBuffer->mesa_buffer.Height != height) { 1810 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL; 1811 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1812 } 1813 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1814} 1815 1816 1817/* 1818 * Bind buffer b to context c and make c the current rendering context. 1819 */ 1820GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1821{ 1822 return XMesaMakeCurrent2( c, b, b ); 1823} 1824 1825 1826/* 1827 * Bind buffer b to context c and make c the current rendering context. 1828 */ 1829PUBLIC 1830GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1831 XMesaBuffer readBuffer ) 1832{ 1833 if (c) { 1834 if (!drawBuffer || !readBuffer) 1835 return GL_FALSE; /* must specify buffers! */ 1836 1837 if (&(c->mesa) == _mesa_get_current_context() 1838 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1839 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1840 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1841 /* same context and buffer, do nothing */ 1842 return GL_TRUE; 1843 } 1844 1845 c->xm_buffer = drawBuffer; 1846 1847#ifdef FX 1848 if (FXmakeCurrent( drawBuffer )) 1849 return GL_TRUE; 1850#endif 1851 1852 /* Call this periodically to detect when the user has begun using 1853 * GL rendering from multiple threads. 1854 */ 1855 _glapi_check_multithread(); 1856 1857 xmesa_check_and_update_buffer_size(c, drawBuffer); 1858 if (readBuffer != drawBuffer) 1859 xmesa_check_and_update_buffer_size(c, readBuffer); 1860 1861 _mesa_make_current(&(c->mesa), 1862 &drawBuffer->mesa_buffer, 1863 &readBuffer->mesa_buffer); 1864 1865 if (c->xm_visual->mesa_visual.rgbMode) { 1866 /* 1867 * Must recompute and set these pixel values because colormap 1868 * can be different for different windows. 1869 */ 1870 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1871 c->clearcolor[0], 1872 c->clearcolor[1], 1873 c->clearcolor[2], 1874 c->clearcolor[3], 1875 c->xm_visual->undithered_pf); 1876 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1877 } 1878 1879 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1880 drawBuffer->wasCurrent = GL_TRUE; 1881 } 1882 else { 1883 /* Detach */ 1884 _mesa_make_current( NULL, NULL, NULL ); 1885 } 1886 return GL_TRUE; 1887} 1888 1889 1890/* 1891 * Unbind the context c from its buffer. 1892 */ 1893GLboolean XMesaUnbindContext( XMesaContext c ) 1894{ 1895 /* A no-op for XFree86 integration purposes */ 1896 return GL_TRUE; 1897} 1898 1899 1900XMesaContext XMesaGetCurrentContext( void ) 1901{ 1902 GET_CURRENT_CONTEXT(ctx); 1903 if (ctx) { 1904 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1905 return xmesa; 1906 } 1907 else { 1908 return 0; 1909 } 1910} 1911 1912 1913XMesaBuffer XMesaGetCurrentBuffer( void ) 1914{ 1915 GET_CURRENT_CONTEXT(ctx); 1916 if (ctx) { 1917 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1918 return xmbuf; 1919 } 1920 else { 1921 return 0; 1922 } 1923} 1924 1925 1926/* New in Mesa 3.1 */ 1927XMesaBuffer XMesaGetCurrentReadBuffer( void ) 1928{ 1929 GET_CURRENT_CONTEXT(ctx); 1930 if (ctx) { 1931 return XMESA_BUFFER(ctx->ReadBuffer); 1932 } 1933 else { 1934 return 0; 1935 } 1936} 1937 1938 1939#ifdef XFree86Server 1940PUBLIC 1941GLboolean XMesaForceCurrent(XMesaContext c) 1942{ 1943 if (c) { 1944 _glapi_set_dispatch(c->mesa.CurrentDispatch); 1945 1946 if (&(c->mesa) != _mesa_get_current_context()) { 1947 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 1948 } 1949 } 1950 else { 1951 _mesa_make_current(NULL, NULL, NULL); 1952 } 1953 return GL_TRUE; 1954} 1955 1956 1957PUBLIC 1958GLboolean XMesaLoseCurrent(XMesaContext c) 1959{ 1960 (void) c; 1961 _mesa_make_current(NULL, NULL, NULL); 1962 return GL_TRUE; 1963} 1964 1965 1966PUBLIC 1967GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask ) 1968{ 1969 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask); 1970 return GL_TRUE; 1971} 1972#endif /* XFree86Server */ 1973 1974 1975#ifndef FX 1976GLboolean XMesaSetFXmode( GLint mode ) 1977{ 1978 (void) mode; 1979 return GL_FALSE; 1980} 1981#endif 1982 1983 1984 1985/* 1986 * Copy the back buffer to the front buffer. If there's no back buffer 1987 * this is a no-op. 1988 */ 1989PUBLIC 1990void XMesaSwapBuffers( XMesaBuffer b ) 1991{ 1992 GET_CURRENT_CONTEXT(ctx); 1993 1994 if (!b->backxrb) { 1995 /* single buffered */ 1996 return; 1997 } 1998 1999 /* If we're swapping the buffer associated with the current context 2000 * we have to flush any pending rendering commands first. 2001 */ 2002 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2003 _mesa_notifySwapBuffers(ctx); 2004 2005 if (b->db_mode) { 2006#ifdef FX 2007 if (FXswapBuffers(b)) 2008 return; 2009#endif 2010 if (b->backxrb->ximage) { 2011 /* Copy Ximage (back buf) from client memory to server window */ 2012#if defined(USE_XSHM) && !defined(XFree86Server) 2013 if (b->shm) { 2014 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2015 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2016 b->swapgc, 2017 b->backxrb->ximage, 0, 0, 2018 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2019 False ); 2020 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2021 } 2022 else 2023#endif 2024 { 2025 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2026 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2027 b->swapgc, 2028 b->backxrb->ximage, 0, 0, 2029 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2030 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2031 } 2032 } 2033 else if (b->backxrb->pixmap) { 2034 /* Copy pixmap (back buf) to window (front buf) on server */ 2035 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2036 XMesaCopyArea( b->xm_visual->display, 2037 b->backxrb->pixmap, /* source drawable */ 2038 b->frontxrb->drawable, /* dest. drawable */ 2039 b->swapgc, 2040 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2041 0, 0 /* dest region */ 2042 ); 2043 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2044 } 2045 2046 if (b->swAlpha) 2047 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); 2048 } 2049#if !defined(XFree86Server) 2050 XSync( b->xm_visual->display, False ); 2051#endif 2052} 2053 2054 2055 2056/* 2057 * Copy sub-region of back buffer to front buffer 2058 */ 2059void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2060{ 2061 GET_CURRENT_CONTEXT(ctx); 2062 2063 /* If we're swapping the buffer associated with the current context 2064 * we have to flush any pending rendering commands first. 2065 */ 2066 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2067 _mesa_notifySwapBuffers(ctx); 2068 2069 if (!b->backxrb) { 2070 /* single buffered */ 2071 return; 2072 } 2073 2074 if (b->db_mode) { 2075 int yTop = b->mesa_buffer.Height - y - height; 2076#ifdef FX 2077 if (FXswapBuffers(b)) 2078 return; 2079#endif 2080 if (b->backxrb->ximage) { 2081 /* Copy Ximage from host's memory to server's window */ 2082#if defined(USE_XSHM) && !defined(XFree86Server) 2083 if (b->shm) { 2084 /* XXX assuming width and height aren't too large! */ 2085 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2086 b->swapgc, 2087 b->backxrb->ximage, x, yTop, 2088 x, yTop, width, height, False ); 2089 /* wait for finished event??? */ 2090 } 2091 else 2092#endif 2093 { 2094 /* XXX assuming width and height aren't too large! */ 2095 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2096 b->swapgc, 2097 b->backxrb->ximage, x, yTop, 2098 x, yTop, width, height ); 2099 } 2100 } 2101 else { 2102 /* Copy pixmap to window on server */ 2103 XMesaCopyArea( b->xm_visual->display, 2104 b->backxrb->pixmap, /* source drawable */ 2105 b->frontxrb->drawable, /* dest. drawable */ 2106 b->swapgc, 2107 x, yTop, width, height, /* source region */ 2108 x, yTop /* dest region */ 2109 ); 2110 } 2111 } 2112} 2113 2114 2115/* 2116 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2117 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2118 * back buffer directly. 2119 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2120 * ximage - pointer to back buffer's XImage, or NULL 2121 * Return: GL_TRUE = context is double buffered 2122 * GL_FALSE = context is single buffered 2123 */ 2124#ifndef XFree86Server 2125GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2126 XMesaPixmap *pixmap, 2127 XMesaImage **ximage ) 2128{ 2129 if (b->db_mode) { 2130 if (pixmap) 2131 *pixmap = b->backxrb->pixmap; 2132 if (ximage) 2133 *ximage = b->backxrb->ximage; 2134 return GL_TRUE; 2135 } 2136 else { 2137 *pixmap = 0; 2138 *ximage = NULL; 2139 return GL_FALSE; 2140 } 2141} 2142#endif /* XFree86Server */ 2143 2144 2145/* 2146 * Return the depth buffer associated with an XMesaBuffer. 2147 * Input: b - the XMesa buffer handle 2148 * Output: width, height - size of buffer in pixels 2149 * bytesPerValue - bytes per depth value (2 or 4) 2150 * buffer - pointer to depth buffer values 2151 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2152 */ 2153GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2154 GLint *bytesPerValue, void **buffer ) 2155{ 2156 struct gl_renderbuffer *rb 2157 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2158 if (!rb || !rb->Data) { 2159 *width = 0; 2160 *height = 0; 2161 *bytesPerValue = 0; 2162 *buffer = 0; 2163 return GL_FALSE; 2164 } 2165 else { 2166 *width = b->mesa_buffer.Width; 2167 *height = b->mesa_buffer.Height; 2168 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2169 ? sizeof(GLushort) : sizeof(GLuint); 2170 *buffer = rb->Data; 2171 return GL_TRUE; 2172 } 2173} 2174 2175 2176void XMesaFlush( XMesaContext c ) 2177{ 2178 if (c && c->xm_visual) { 2179#ifdef XFree86Server 2180 /* NOT_NEEDED */ 2181#else 2182 XSync( c->xm_visual->display, False ); 2183#endif 2184 } 2185} 2186 2187 2188 2189const char *XMesaGetString( XMesaContext c, int name ) 2190{ 2191 (void) c; 2192 if (name==XMESA_VERSION) { 2193 return "5.0"; 2194 } 2195 else if (name==XMESA_EXTENSIONS) { 2196 return ""; 2197 } 2198 else { 2199 return NULL; 2200 } 2201} 2202 2203 2204 2205XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2206{ 2207 XMesaBuffer b; 2208 for (b=XMesaBufferList; b; b=b->Next) { 2209 if (b->frontxrb->drawable == d && b->display == dpy) { 2210 return b; 2211 } 2212 } 2213 return NULL; 2214} 2215 2216 2217/** 2218 * Free/destroy all XMesaBuffers associated with given display. 2219 */ 2220void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 2221{ 2222 XMesaBuffer b, next; 2223 for (b = XMesaBufferList; b; b = next) { 2224 next = b->Next; 2225 if (b->display == dpy) { 2226 xmesa_free_buffer(b); 2227 } 2228 } 2229} 2230 2231 2232/* 2233 * Look for XMesaBuffers whose X window has been destroyed. 2234 * Deallocate any such XMesaBuffers. 2235 */ 2236void XMesaGarbageCollect( void ) 2237{ 2238 XMesaBuffer b, next; 2239 for (b=XMesaBufferList; b; b=next) { 2240 next = b->Next; 2241 if (b->display && b->frontxrb->drawable && b->type == WINDOW) { 2242#ifdef XFree86Server 2243 /* NOT_NEEDED */ 2244#else 2245 XSync(b->display, False); 2246 if (!window_exists( b->display, b->frontxrb->drawable )) { 2247 /* found a dead window, free the ancillary info */ 2248 XMesaDestroyBuffer( b ); 2249 } 2250#endif 2251 } 2252 } 2253} 2254 2255 2256unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2257 GLfloat red, GLfloat green, 2258 GLfloat blue, GLfloat alpha ) 2259{ 2260 GLcontext *ctx = &xmesa->mesa; 2261 GLint r = (GLint) (red * 255.0F); 2262 GLint g = (GLint) (green * 255.0F); 2263 GLint b = (GLint) (blue * 255.0F); 2264 GLint a = (GLint) (alpha * 255.0F); 2265 2266 switch (xmesa->pixelformat) { 2267 case PF_Index: 2268 return 0; 2269 case PF_Truecolor: 2270 { 2271 unsigned long p; 2272 PACK_TRUECOLOR( p, r, g, b ); 2273 return p; 2274 } 2275 case PF_8A8B8G8R: 2276 return PACK_8A8B8G8R( r, g, b, a ); 2277 case PF_8A8R8G8B: 2278 return PACK_8A8R8G8B( r, g, b, a ); 2279 case PF_8R8G8B: 2280 return PACK_8R8G8B( r, g, b ); 2281 case PF_5R6G5B: 2282 return PACK_5R6G5B( r, g, b ); 2283 case PF_Dither: 2284 { 2285 DITHER_SETUP; 2286 return DITHER( x, y, r, g, b ); 2287 } 2288 case PF_1Bit: 2289 /* 382 = (3*255)/2 */ 2290 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2291 case PF_HPCR: 2292 return DITHER_HPCR(x, y, r, g, b); 2293 case PF_Lookup: 2294 { 2295 LOOKUP_SETUP; 2296 return LOOKUP( r, g, b ); 2297 } 2298 case PF_Grayscale: 2299 return GRAY_RGB( r, g, b ); 2300 case PF_Dither_5R6G5B: 2301 /* fall through */ 2302 case PF_Dither_True: 2303 { 2304 unsigned long p; 2305 PACK_TRUEDITHER(p, x, y, r, g, b); 2306 return p; 2307 } 2308 default: 2309 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2310 } 2311 return 0; 2312} 2313 2314 2315/* 2316 * This is typically called when the window size changes and we need 2317 * to reallocate the buffer's back/depth/stencil/accum buffers. 2318 */ 2319PUBLIC void 2320XMesaResizeBuffers( XMesaBuffer b ) 2321{ 2322 GET_CURRENT_CONTEXT(ctx); 2323 XMesaContext xmctx = XMESA_CONTEXT(ctx); 2324 if (!xmctx) 2325 return; 2326 xmesa_check_and_update_buffer_size(xmctx, b); 2327} 2328 2329 2330static GLint 2331xbuffer_to_renderbuffer(int buffer) 2332{ 2333 assert(MAX_AUX_BUFFERS <= 4); 2334 2335 switch (buffer) { 2336 case GLX_FRONT_LEFT_EXT: 2337 return BUFFER_FRONT_LEFT; 2338 case GLX_FRONT_RIGHT_EXT: 2339 return BUFFER_FRONT_RIGHT; 2340 case GLX_BACK_LEFT_EXT: 2341 return BUFFER_BACK_LEFT; 2342 case GLX_BACK_RIGHT_EXT: 2343 return BUFFER_BACK_RIGHT; 2344 case GLX_AUX0_EXT: 2345 return BUFFER_AUX0; 2346 case GLX_AUX1_EXT: 2347 return BUFFER_AUX1; 2348 case GLX_AUX2_EXT: 2349 return BUFFER_AUX2; 2350 case GLX_AUX3_EXT: 2351 return BUFFER_AUX3; 2352 case GLX_AUX4_EXT: 2353 case GLX_AUX5_EXT: 2354 case GLX_AUX6_EXT: 2355 case GLX_AUX7_EXT: 2356 case GLX_AUX8_EXT: 2357 case GLX_AUX9_EXT: 2358 default: 2359 /* BadValue error */ 2360 return -1; 2361 } 2362} 2363 2364 2365PUBLIC void 2366XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer, 2367 const int *attrib_list) 2368{ 2369#if 0 2370 GET_CURRENT_CONTEXT(ctx); 2371 const GLuint unit = ctx->Texture.CurrentUnit; 2372 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; 2373 struct gl_texture_object *texObj; 2374#endif 2375 struct gl_renderbuffer *rb; 2376 struct xmesa_renderbuffer *xrb; 2377 GLint b; 2378 XMesaImage *img = NULL; 2379 GLboolean freeImg = GL_FALSE; 2380 2381 b = xbuffer_to_renderbuffer(buffer); 2382 if (b < 0) 2383 return; 2384 2385 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT) 2386 return; /* BadMatch error */ 2387 2388 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer; 2389 if (!rb) { 2390 /* invalid buffer */ 2391 return; 2392 } 2393 xrb = xmesa_renderbuffer(rb); 2394 2395#if 0 2396 switch (drawable->TextureTarget) { 2397 case GLX_TEXTURE_1D_EXT: 2398 texObj = texUnit->Current1D; 2399 break; 2400 case GLX_TEXTURE_2D_EXT: 2401 texObj = texUnit->Current2D; 2402 break; 2403 case GLX_TEXTURE_RECTANGLE_EXT: 2404 texObj = texUnit->CurrentRect; 2405 break; 2406 default: 2407 return; /* BadMatch error */ 2408 } 2409#endif 2410 2411 /* 2412 * The following is a quick and simple way to implement 2413 * BindTexImage. The better way is to write some new FetchTexel() 2414 * functions which would extract texels from XImages. We'd still 2415 * need to use GetImage when texturing from a Pixmap (front buffer) 2416 * but texturing from a back buffer (XImage) would avoid an image 2417 * copy. 2418 */ 2419 2420 /* get XImage */ 2421 if (xrb->pixmap) { 2422 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L, 2423 ZPixmap); 2424 freeImg = GL_TRUE; 2425 } 2426 else if (xrb->ximage) { 2427 img = xrb->ximage; 2428 } 2429 2430 /* store the XImage as a new texture image */ 2431 if (img) { 2432 GLenum format, type, intFormat; 2433 if (img->bits_per_pixel == 32) { 2434 format = GL_BGRA; 2435 type = GL_UNSIGNED_BYTE; 2436 intFormat = GL_RGBA; 2437 } 2438 else if (img->bits_per_pixel == 24) { 2439 format = GL_BGR; 2440 type = GL_UNSIGNED_BYTE; 2441 intFormat = GL_RGB; 2442 } 2443 else if (img->bits_per_pixel == 16) { 2444 format = GL_BGR; 2445 type = GL_UNSIGNED_SHORT_5_6_5; 2446 intFormat = GL_RGB; 2447 } 2448 else { 2449 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage"); 2450 return; 2451 } 2452 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) { 2453 intFormat = GL_RGBA; 2454 } 2455 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) { 2456 intFormat = GL_RGB; 2457 } 2458 2459 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0, 2460 format, type, img->data); 2461 2462 if (freeImg) { 2463 XMesaDestroyImage(img); 2464 } 2465 } 2466} 2467 2468 2469 2470PUBLIC void 2471XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer) 2472{ 2473 const GLint b = xbuffer_to_renderbuffer(buffer); 2474 if (b < 0) 2475 return; 2476 2477 /* no-op for now */ 2478} 2479 2480