xm_api.c revision e734369565c816dea47c3c8e2fde76fa09fd9e6c
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/xmesa.h" 67#include "xmesaP.h" 68#include "context.h" 69#include "extensions.h" 70#include "framebuffer.h" 71#include "glthread.h" 72#include "imports.h" 73#include "macros.h" 74#include "renderbuffer.h" 75#include "teximage.h" 76#include "swrast/swrast.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 84/** 85 * Global X driver lock 86 */ 87_glthread_Mutex _xmesa_lock; 88 89 90 91/** 92 * Lookup tables for HPCR pixel format: 93 */ 94static short hpcr_rgbTbl[3][256] = { 95{ 96 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 97 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 98 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 99 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 100 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 101 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 102 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 103 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 104112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 105128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 106144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 107160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 108176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 109192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 110208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 111224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 112}, 113{ 114 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 115 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 116 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 117 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 118 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 119 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 120 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 121 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 122112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 123128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 124144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 125160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 126176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 127192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 128208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 129224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 130}, 131{ 132 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 133 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 134 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 135 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 136 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 137 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 138 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 139 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 140 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 141112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 142128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 143144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 144160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 145176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 146192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 147208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 148} 149}; 150 151 152 153/**********************************************************************/ 154/***** X Utility Functions *****/ 155/**********************************************************************/ 156 157 158/** 159 * Return the host's byte order as LSBFirst or MSBFirst ala X. 160 */ 161#ifndef XFree86Server 162static int host_byte_order( void ) 163{ 164 int i = 1; 165 char *cptr = (char *) &i; 166 return (*cptr==1) ? LSBFirst : MSBFirst; 167} 168#endif 169 170 171/** 172 * Check if the X Shared Memory extension is available. 173 * Return: 0 = not available 174 * 1 = shared XImage support available 175 * 2 = shared Pixmap support available also 176 */ 177static int check_for_xshm( XMesaDisplay *display ) 178{ 179#if defined(USE_XSHM) && !defined(XFree86Server) 180 int major, minor, ignore; 181 Bool pixmaps; 182 183 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 184 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 185 return (pixmaps==True) ? 2 : 1; 186 } 187 else { 188 return 0; 189 } 190 } 191 else { 192 return 0; 193 } 194#else 195 /* No XSHM support */ 196 return 0; 197#endif 198} 199 200 201/** 202 * Apply gamma correction to an intensity value in [0..max]. Return the 203 * new intensity value. 204 */ 205static GLint 206gamma_adjust( GLfloat gamma, GLint value, GLint max ) 207{ 208 if (gamma == 1.0) { 209 return value; 210 } 211 else { 212 double x = (double) value / (double) max; 213 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 214 } 215} 216 217 218 219/** 220 * Return the true number of bits per pixel for XImages. 221 * For example, if we request a 24-bit deep visual we may actually need/get 222 * 32bpp XImages. This function returns the appropriate bpp. 223 * Input: dpy - the X display 224 * visinfo - desribes the visual to be used for XImages 225 * Return: true number of bits per pixel for XImages 226 */ 227static int 228bits_per_pixel( XMesaVisual xmv ) 229{ 230#ifdef XFree86Server 231 const int depth = xmv->nplanes; 232 int i; 233 assert(depth > 0); 234 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 235 if (screenInfo.formats[i].depth == depth) 236 return screenInfo.formats[i].bitsPerPixel; 237 } 238 return depth; /* should never get here, but this should be safe */ 239#else 240 XMesaDisplay *dpy = xmv->display; 241 XMesaVisualInfo visinfo = xmv->visinfo; 242 XMesaImage *img; 243 int bitsPerPixel; 244 /* Create a temporary XImage */ 245 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 246 ZPixmap, 0, /*format, offset*/ 247 (char*) MALLOC(8), /*data*/ 248 1, 1, /*width, height*/ 249 32, /*bitmap_pad*/ 250 0 /*bytes_per_line*/ 251 ); 252 assert(img); 253 /* grab the bits/pixel value */ 254 bitsPerPixel = img->bits_per_pixel; 255 /* free the XImage */ 256 _mesa_free( img->data ); 257 img->data = NULL; 258 XMesaDestroyImage( img ); 259 return bitsPerPixel; 260#endif 261} 262 263 264 265/* 266 * Determine if a given X window ID is valid (window exists). 267 * Do this by calling XGetWindowAttributes() for the window and 268 * checking if we catch an X error. 269 * Input: dpy - the display 270 * win - the window to check for existance 271 * Return: GL_TRUE - window exists 272 * GL_FALSE - window doesn't exist 273 */ 274#ifndef XFree86Server 275static GLboolean WindowExistsFlag; 276 277static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 278{ 279 (void) dpy; 280 if (xerr->error_code == BadWindow) { 281 WindowExistsFlag = GL_FALSE; 282 } 283 return 0; 284} 285 286static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 287{ 288 XWindowAttributes wa; 289 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 290 WindowExistsFlag = GL_TRUE; 291 old_handler = XSetErrorHandler(window_exists_err_handler); 292 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 293 XSetErrorHandler(old_handler); 294 return WindowExistsFlag; 295} 296 297static Status 298get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height ) 299{ 300 Window root; 301 Status stat; 302 int xpos, ypos; 303 unsigned int w, h, bw, depth; 304 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth); 305 *width = w; 306 *height = h; 307 return stat; 308} 309#endif 310 311 312/** 313 * Return the size of the window (or pixmap) that corresponds to the 314 * given XMesaBuffer. 315 * \param width returns width in pixels 316 * \param height returns height in pixels 317 */ 318void 319xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, 320 GLuint *width, GLuint *height) 321{ 322#ifdef XFree86Server 323 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH); 324 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT); 325#else 326 Status stat; 327 328 _glthread_LOCK_MUTEX(_xmesa_lock); 329 XSync(b->xm_visual->display, 0); /* added for Chromium */ 330 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height); 331 _glthread_UNLOCK_MUTEX(_xmesa_lock); 332 333 if (!stat) { 334 /* probably querying a window that's recently been destroyed */ 335 _mesa_warning(NULL, "XGetGeometry failed!\n"); 336 *width = *height = 1; 337 } 338#endif 339} 340 341 342 343/**********************************************************************/ 344/***** Linked list of XMesaBuffers *****/ 345/**********************************************************************/ 346 347XMesaBuffer XMesaBufferList = NULL; 348 349 350/** 351 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 352 * Note that XMesaBuffer is derived from GLframebuffer. 353 * The new XMesaBuffer will not have any size (Width=Height=0). 354 * 355 * \param d the corresponding X drawable (window or pixmap) 356 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 357 * \param vis the buffer's visual 358 * \param cmap the window's colormap, if known. 359 * \return new XMesaBuffer or NULL if any problem 360 */ 361static XMesaBuffer 362create_xmesa_buffer(XMesaDrawable d, BufferType type, 363 XMesaVisual vis, XMesaColormap cmap) 364{ 365 XMesaBuffer b; 366 367 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 368 369 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 370 if (!b) 371 return NULL; 372 373 b->display = vis->display; 374 b->xm_visual = vis; 375 b->type = type; 376 b->cmap = cmap; 377 378 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 379 b->mesa_buffer.Delete = xmesa_delete_framebuffer; 380 381 /* 382 * Front renderbuffer 383 */ 384 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE); 385 if (!b->frontxrb) { 386 _mesa_free(b); 387 return NULL; 388 } 389 b->frontxrb->Parent = b; 390 b->frontxrb->drawable = d; 391 b->frontxrb->pixmap = (XMesaPixmap) d; 392 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 393 &b->frontxrb->Base); 394 395 /* 396 * Back renderbuffer 397 */ 398 if (vis->mesa_visual.doubleBufferMode) { 399 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE); 400 if (!b->backxrb) { 401 /* XXX free front xrb too */ 402 _mesa_free(b); 403 return NULL; 404 } 405 b->backxrb->Parent = b; 406 /* determine back buffer implementation */ 407 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 408 409 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 410 &b->backxrb->Base); 411 } 412 413 /* 414 * Software alpha planes 415 */ 416 if (vis->mesa_visual.alphaBits > 0 417 && vis->undithered_pf != PF_8A8B8G8R 418 && vis->undithered_pf != PF_8A8R8G8B) { 419 /* Visual has alpha, but pixel format doesn't support it. 420 * We'll use an alpha renderbuffer wrapper. 421 */ 422 b->swAlpha = GL_TRUE; 423 } 424 else { 425 b->swAlpha = GL_FALSE; 426 } 427 428 /* 429 * Other renderbuffer (depth, stencil, etc) 430 */ 431 _mesa_add_soft_renderbuffers(&b->mesa_buffer, 432 GL_FALSE, /* color */ 433 vis->mesa_visual.haveDepthBuffer, 434 vis->mesa_visual.haveStencilBuffer, 435 vis->mesa_visual.haveAccumBuffer, 436 b->swAlpha, 437 vis->mesa_visual.numAuxBuffers > 0 ); 438 439 /* GLX_EXT_texture_from_pixmap */ 440 b->TextureTarget = 0; 441 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT; 442 b->TextureMipmap = 0; 443 444 /* insert buffer into linked list */ 445 b->Next = XMesaBufferList; 446 XMesaBufferList = b; 447 448 return b; 449} 450 451 452/** 453 * Find an XMesaBuffer by matching X display and colormap but NOT matching 454 * the notThis buffer. 455 */ 456XMesaBuffer 457xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis) 458{ 459 XMesaBuffer b; 460 for (b=XMesaBufferList; b; b=b->Next) { 461 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 462 return b; 463 } 464 } 465 return NULL; 466} 467 468 469/** 470 * Remove buffer from linked list, delete if no longer referenced. 471 */ 472static void 473xmesa_free_buffer(XMesaBuffer buffer) 474{ 475 XMesaBuffer prev = NULL, b; 476 477 for (b = XMesaBufferList; b; b = b->Next) { 478 if (b == buffer) { 479 struct gl_framebuffer *fb = &buffer->mesa_buffer; 480 481 /* unlink buffer from list */ 482 if (prev) 483 prev->Next = buffer->Next; 484 else 485 XMesaBufferList = buffer->Next; 486 487 /* mark as delete pending */ 488 fb->DeletePending = GL_TRUE; 489 490 /* Since the X window for the XMesaBuffer is going away, we don't 491 * want to dereference this pointer in the future. 492 */ 493 b->frontxrb->drawable = 0; 494 495 /* Unreference. If count = zero we'll really delete the buffer */ 496 _mesa_unreference_framebuffer(&fb); 497 498 return; 499 } 500 /* continue search */ 501 prev = b; 502 } 503 /* buffer not found in XMesaBufferList */ 504 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 505} 506 507 508/** 509 * Copy X color table stuff from one XMesaBuffer to another. 510 */ 511static void 512copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 513{ 514 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 515 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 516 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 517 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 518 dst->num_alloced = src->num_alloced; 519 MEMCPY(dst->alloced_colors, src->alloced_colors, 520 sizeof(src->alloced_colors)); 521} 522 523 524 525/**********************************************************************/ 526/***** Misc Private Functions *****/ 527/**********************************************************************/ 528 529 530/** 531 * A replacement for XAllocColor. This function should never 532 * fail to allocate a color. When XAllocColor fails, we return 533 * the nearest matching color. If we have to allocate many colors 534 * this function isn't too efficient; the XQueryColors() could be 535 * done just once. 536 * Written by Michael Pichler, Brian Paul, Mark Kilgard 537 * Input: dpy - X display 538 * cmap - X colormap 539 * cmapSize - size of colormap 540 * In/Out: color - the XColor struct 541 * Output: exact - 1=exact color match, 0=closest match 542 * alloced - 1=XAlloc worked, 0=XAlloc failed 543 */ 544static void 545noFaultXAllocColor( int client, 546 XMesaDisplay *dpy, 547 XMesaColormap cmap, 548 int cmapSize, 549 XMesaColor *color, 550 int *exact, int *alloced ) 551{ 552#ifdef XFree86Server 553 Pixel *ppixIn; 554 xrgb *ctable; 555#else 556 /* we'll try to cache ctable for better remote display performance */ 557 static Display *prevDisplay = NULL; 558 static XMesaColormap prevCmap = 0; 559 static int prevCmapSize = 0; 560 static XMesaColor *ctable = NULL; 561#endif 562 XMesaColor subColor; 563 int i, bestmatch; 564 double mindist; /* 3*2^16^2 exceeds long int precision. */ 565 566 (void) client; 567 568 /* First try just using XAllocColor. */ 569#ifdef XFree86Server 570 if (AllocColor(cmap, 571 &color->red, &color->green, &color->blue, 572 &color->pixel, 573 client) == Success) 574#else 575 if (XAllocColor(dpy, cmap, color)) 576#endif 577 { 578 *exact = 1; 579 *alloced = 1; 580 return; 581 } 582 583 /* Alloc failed, search for closest match */ 584 585 /* Retrieve color table entries. */ 586 /* XXX alloca candidate. */ 587#ifdef XFree86Server 588 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 589 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 590 for (i = 0; i < cmapSize; i++) { 591 ppixIn[i] = i; 592 } 593 QueryColors(cmap, cmapSize, ppixIn, ctable); 594#else 595 if (prevDisplay != dpy || prevCmap != cmap 596 || prevCmapSize != cmapSize || !ctable) { 597 /* free previously cached color table */ 598 if (ctable) 599 _mesa_free(ctable); 600 /* Get the color table from X */ 601 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 602 assert(ctable); 603 for (i = 0; i < cmapSize; i++) { 604 ctable[i].pixel = i; 605 } 606 XQueryColors(dpy, cmap, ctable, cmapSize); 607 prevDisplay = dpy; 608 prevCmap = cmap; 609 prevCmapSize = cmapSize; 610 } 611#endif 612 613 /* Find best match. */ 614 bestmatch = -1; 615 mindist = 0.0; 616 for (i = 0; i < cmapSize; i++) { 617 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 618 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 619 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 620 double dist = dr * dr + dg * dg + db * db; 621 if (bestmatch < 0 || dist < mindist) { 622 bestmatch = i; 623 mindist = dist; 624 } 625 } 626 627 /* Return result. */ 628 subColor.red = ctable[bestmatch].red; 629 subColor.green = ctable[bestmatch].green; 630 subColor.blue = ctable[bestmatch].blue; 631 /* Try to allocate the closest match color. This should only 632 * fail if the cell is read/write. Otherwise, we're incrementing 633 * the cell's reference count. 634 */ 635#ifdef XFree86Server 636 if (AllocColor(cmap, 637 &subColor.red, &subColor.green, &subColor.blue, 638 &subColor.pixel, 639 client) == Success) { 640#else 641 if (XAllocColor(dpy, cmap, &subColor)) { 642#endif 643 *alloced = 1; 644 } 645 else { 646 /* do this to work around a problem reported by Frank Ortega */ 647 subColor.pixel = (unsigned long) bestmatch; 648 subColor.red = ctable[bestmatch].red; 649 subColor.green = ctable[bestmatch].green; 650 subColor.blue = ctable[bestmatch].blue; 651 subColor.flags = DoRed | DoGreen | DoBlue; 652 *alloced = 0; 653 } 654#ifdef XFree86Server 655 _mesa_free(ppixIn); 656 _mesa_free(ctable); 657#else 658 /* don't free table, save it for next time */ 659#endif 660 661 *color = subColor; 662 *exact = 0; 663} 664 665 666 667/** 668 * Do setup for PF_GRAYSCALE pixel format. 669 * Note that buffer may be NULL. 670 */ 671static GLboolean 672setup_grayscale(int client, XMesaVisual v, 673 XMesaBuffer buffer, XMesaColormap cmap) 674{ 675 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 676 return GL_FALSE; 677 } 678 679 if (buffer) { 680 XMesaBuffer prevBuffer; 681 682 if (!cmap) { 683 return GL_FALSE; 684 } 685 686 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 687 if (prevBuffer && 688 (buffer->xm_visual->mesa_visual.rgbMode == 689 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 690 /* Copy colormap stuff from previous XMesaBuffer which uses same 691 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 692 */ 693 copy_colortable_info(buffer, prevBuffer); 694 } 695 else { 696 /* Allocate 256 shades of gray */ 697 int gray; 698 int colorsfailed = 0; 699 for (gray=0;gray<256;gray++) { 700 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 701 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 702 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 703 int exact, alloced; 704 XMesaColor xcol; 705 xcol.red = (r << 8) | r; 706 xcol.green = (g << 8) | g; 707 xcol.blue = (b << 8) | b; 708 noFaultXAllocColor( client, v->display, 709 cmap, GET_COLORMAP_SIZE(v), 710 &xcol, &exact, &alloced ); 711 if (!exact) { 712 colorsfailed++; 713 } 714 if (alloced) { 715 assert(buffer->num_alloced<256); 716 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 717 buffer->num_alloced++; 718 } 719 720 /*OLD 721 assert(gray < 576); 722 buffer->color_table[gray*3+0] = xcol.pixel; 723 buffer->color_table[gray*3+1] = xcol.pixel; 724 buffer->color_table[gray*3+2] = xcol.pixel; 725 assert(xcol.pixel < 65536); 726 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 727 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 728 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 729 */ 730 buffer->color_table[gray] = xcol.pixel; 731 assert(xcol.pixel < 65536); 732 buffer->pixel_to_r[xcol.pixel] = gray; 733 buffer->pixel_to_g[xcol.pixel] = gray; 734 buffer->pixel_to_b[xcol.pixel] = gray; 735 } 736 737 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 738 _mesa_warning(NULL, 739 "Note: %d out of 256 needed colors do not match exactly.\n", 740 colorsfailed ); 741 } 742 } 743 } 744 745 v->dithered_pf = PF_Grayscale; 746 v->undithered_pf = PF_Grayscale; 747 return GL_TRUE; 748} 749 750 751 752/** 753 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 754 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 755 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 756 * color. While this function was originally designed just for 8-bit 757 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 758 * Dithering code contributed by Bob Mercier. 759 */ 760static GLboolean 761setup_dithered_color(int client, XMesaVisual v, 762 XMesaBuffer buffer, XMesaColormap cmap) 763{ 764 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 765 return GL_FALSE; 766 } 767 768 if (buffer) { 769 XMesaBuffer prevBuffer; 770 771 if (!cmap) { 772 return GL_FALSE; 773 } 774 775 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 776 if (prevBuffer && 777 (buffer->xm_visual->mesa_visual.rgbMode == 778 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 779 /* Copy colormap stuff from previous, matching XMesaBuffer. 780 * Do this to avoid time spent in noFaultXAllocColor. 781 */ 782 copy_colortable_info(buffer, prevBuffer); 783 } 784 else { 785 /* Allocate X colors and initialize color_table[], red_table[], etc */ 786 int r, g, b, i; 787 int colorsfailed = 0; 788 for (r = 0; r < DITH_R; r++) { 789 for (g = 0; g < DITH_G; g++) { 790 for (b = 0; b < DITH_B; b++) { 791 XMesaColor xcol; 792 int exact, alloced; 793 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 794 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 795 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 796 noFaultXAllocColor( client, v->display, 797 cmap, GET_COLORMAP_SIZE(v), 798 &xcol, &exact, &alloced ); 799 if (!exact) { 800 colorsfailed++; 801 } 802 if (alloced) { 803 assert(buffer->num_alloced<256); 804 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 805 buffer->num_alloced++; 806 } 807 i = DITH_MIX( r, g, b ); 808 assert(i < 576); 809 buffer->color_table[i] = xcol.pixel; 810 assert(xcol.pixel < 65536); 811 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 812 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 813 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 814 } 815 } 816 } 817 818 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 819 _mesa_warning(NULL, 820 "Note: %d out of %d needed colors do not match exactly.\n", 821 colorsfailed, DITH_R * DITH_G * DITH_B ); 822 } 823 } 824 } 825 826 v->dithered_pf = PF_Dither; 827 v->undithered_pf = PF_Lookup; 828 return GL_TRUE; 829} 830 831 832/** 833 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 834 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 835 * Special dithering tables have to be initialized. 836 */ 837static void 838setup_8bit_hpcr(XMesaVisual v) 839{ 840 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 841 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 842 * on the root window AND the colormap obtainable by XGetRGBColormaps 843 * for that atom must be set on the window. (see also tkInitWindow) 844 * If that colormap is not set, the output will look stripy. 845 */ 846 847 /* Setup color tables with gamma correction */ 848 int i; 849 double g; 850 851 g = 1.0 / v->RedGamma; 852 for (i=0; i<256; i++) { 853 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 854 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 855 } 856 857 g = 1.0 / v->GreenGamma; 858 for (i=0; i<256; i++) { 859 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 860 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 861 } 862 863 g = 1.0 / v->BlueGamma; 864 for (i=0; i<256; i++) { 865 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 866 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 867 } 868 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 869 v->dithered_pf = PF_HPCR; 870 871 /* which method should I use to clear */ 872 /* GL_FALSE: keep the ordinary method */ 873 /* GL_TRUE : clear with dither pattern */ 874 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 875 876 if (v->hpcr_clear_flag) { 877 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 878 DefaultRootWindow(v->display), 879 16, 2, 8); 880#ifndef XFree86Server 881 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 882 0, 0, 16, 2, AllPlanes, ZPixmap); 883#endif 884 } 885} 886 887 888/** 889 * Setup RGB rendering for a window with a True/DirectColor visual. 890 */ 891static void 892setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) 893{ 894 unsigned long rmask, gmask, bmask; 895 (void) buffer; 896 (void) cmap; 897 898 /* Compute red multiplier (mask) and bit shift */ 899 v->rshift = 0; 900 rmask = GET_REDMASK(v); 901 while ((rmask & 1)==0) { 902 v->rshift++; 903 rmask = rmask >> 1; 904 } 905 906 /* Compute green multiplier (mask) and bit shift */ 907 v->gshift = 0; 908 gmask = GET_GREENMASK(v); 909 while ((gmask & 1)==0) { 910 v->gshift++; 911 gmask = gmask >> 1; 912 } 913 914 /* Compute blue multiplier (mask) and bit shift */ 915 v->bshift = 0; 916 bmask = GET_BLUEMASK(v); 917 while ((bmask & 1)==0) { 918 v->bshift++; 919 bmask = bmask >> 1; 920 } 921 922 /* 923 * Compute component-to-pixel lookup tables and dithering kernel 924 */ 925 { 926 static GLubyte kernel[16] = { 927 0*16, 8*16, 2*16, 10*16, 928 12*16, 4*16, 14*16, 6*16, 929 3*16, 11*16, 1*16, 9*16, 930 15*16, 7*16, 13*16, 5*16, 931 }; 932 GLint rBits = _mesa_bitcount(rmask); 933 GLint gBits = _mesa_bitcount(gmask); 934 GLint bBits = _mesa_bitcount(bmask); 935 GLint maxBits; 936 GLuint i; 937 938 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 939 for (i=0; i<=rmask; i++) 940 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 941 for (i=0; i<=gmask; i++) 942 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 943 for (i=0; i<=bmask; i++) 944 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 945 946 /* convert RGB values from [0,255] to pixel components */ 947 948 for (i=0;i<256;i++) { 949 GLint r = gamma_adjust(v->RedGamma, i, 255); 950 GLint g = gamma_adjust(v->GreenGamma, i, 255); 951 GLint b = gamma_adjust(v->BlueGamma, i, 255); 952 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 953 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 954 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 955 } 956 /* overflow protection */ 957 for (i=256;i<512;i++) { 958 v->RtoPixel[i] = v->RtoPixel[255]; 959 v->GtoPixel[i] = v->GtoPixel[255]; 960 v->BtoPixel[i] = v->BtoPixel[255]; 961 } 962 963 /* setup dithering kernel */ 964 maxBits = rBits; 965 if (gBits > maxBits) maxBits = gBits; 966 if (bBits > maxBits) maxBits = bBits; 967 for (i=0;i<16;i++) { 968 v->Kernel[i] = kernel[i] >> maxBits; 969 } 970 971 v->undithered_pf = PF_Truecolor; 972 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 973 } 974 975 /* 976 * Now check for TrueColor visuals which we can optimize. 977 */ 978 if ( GET_REDMASK(v) ==0x0000ff 979 && GET_GREENMASK(v)==0x00ff00 980 && GET_BLUEMASK(v) ==0xff0000 981 && CHECK_BYTE_ORDER(v) 982 && v->BitsPerPixel==32 983 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 984 /* common 32 bpp config used on SGI, Sun */ 985 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ 986 } 987 else if (GET_REDMASK(v) == 0xff0000 988 && GET_GREENMASK(v)== 0x00ff00 989 && GET_BLUEMASK(v) == 0x0000ff 990 && CHECK_BYTE_ORDER(v) 991 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ 992 if (v->BitsPerPixel==32) { 993 /* if 32 bpp, and visual indicates 8 bpp alpha channel */ 994 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) 995 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ 996 else 997 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ 998 } 999 else if (v->BitsPerPixel == 24) { 1000 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ 1001 } 1002 } 1003 else if (GET_REDMASK(v) ==0xf800 1004 && GET_GREENMASK(v)==0x07e0 1005 && GET_BLUEMASK(v) ==0x001f 1006 && CHECK_BYTE_ORDER(v) 1007 && v->BitsPerPixel==16 1008 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1009 /* 5-6-5 RGB */ 1010 v->undithered_pf = PF_5R6G5B; 1011 v->dithered_pf = PF_Dither_5R6G5B; 1012 } 1013 else if (GET_REDMASK(v) ==0xe0 1014 && GET_GREENMASK(v)==0x1c 1015 && GET_BLUEMASK(v) ==0x03 1016 && CHECK_FOR_HPCR(v)) { 1017 /* 8-bit HP color recovery */ 1018 setup_8bit_hpcr( v ); 1019 } 1020} 1021 1022 1023 1024/** 1025 * Setup RGB rendering for a window with a monochrome visual. 1026 */ 1027static void 1028setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1029{ 1030 (void) b; 1031 v->dithered_pf = v->undithered_pf = PF_1Bit; 1032 /* if black=1 then we must flip pixel values */ 1033 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1034} 1035 1036 1037 1038/** 1039 * When a context is bound for the first time, we can finally finish 1040 * initializing the context's visual and buffer information. 1041 * \param v the XMesaVisual to initialize 1042 * \param b the XMesaBuffer to initialize (may be NULL) 1043 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 1044 * \param window the window/pixmap we're rendering into 1045 * \param cmap the colormap associated with the window/pixmap 1046 * \return GL_TRUE=success, GL_FALSE=failure 1047 */ 1048static GLboolean 1049initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, 1050 GLboolean rgb_flag, XMesaDrawable window, 1051 XMesaColormap cmap) 1052{ 1053 int client = 0; 1054 1055#ifdef XFree86Server 1056 client = (window) ? CLIENT_ID(window->id) : 0; 1057#endif 1058 1059 ASSERT(!b || b->xm_visual == v); 1060 1061 /* Save true bits/pixel */ 1062 v->BitsPerPixel = bits_per_pixel(v); 1063 assert(v->BitsPerPixel > 0); 1064 1065 if (rgb_flag == GL_FALSE) { 1066 /* COLOR-INDEXED WINDOW: 1067 * Even if the visual is TrueColor or DirectColor we treat it as 1068 * being color indexed. This is weird but might be useful to someone. 1069 */ 1070 v->dithered_pf = v->undithered_pf = PF_Index; 1071 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1072 } 1073 else { 1074 /* RGB WINDOW: 1075 * We support RGB rendering into almost any kind of visual. 1076 */ 1077 const int xclass = v->mesa_visual.visualType; 1078 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1079 setup_truecolor( v, b, cmap ); 1080 } 1081 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { 1082 setup_monochrome( v, b ); 1083 } 1084 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { 1085 if (!setup_grayscale( client, v, b, cmap )) { 1086 return GL_FALSE; 1087 } 1088 } 1089 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) 1090 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1091 if (!setup_dithered_color( client, v, b, cmap )) { 1092 return GL_FALSE; 1093 } 1094 } 1095 else { 1096 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 1097 return GL_FALSE; 1098 } 1099 v->mesa_visual.indexBits = 0; 1100 1101 if (_mesa_getenv("MESA_NO_DITHER")) { 1102 v->dithered_pf = v->undithered_pf; 1103 } 1104 } 1105 1106 1107 /* 1108 * If MESA_INFO env var is set print out some debugging info 1109 * which can help Brian figure out what's going on when a user 1110 * reports bugs. 1111 */ 1112 if (_mesa_getenv("MESA_INFO")) { 1113 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1114 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1115 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1116 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1117 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1118 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1119 } 1120 1121 if (b && window) { 1122 char *data; 1123 1124 /* Do window-specific initializations */ 1125 1126 /* these should have been set in create_xmesa_buffer */ 1127 ASSERT(b->frontxrb->drawable == window); 1128 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 1129 1130 /* Setup for single/double buffering */ 1131 if (v->mesa_visual.doubleBufferMode) { 1132 /* Double buffered */ 1133 b->shm = check_for_xshm( v->display ); 1134 } 1135 1136 /* X11 graphics contexts */ 1137#ifdef XFree86Server 1138 b->gc = CreateScratchGC(v->display, window->depth); 1139#else 1140 b->gc = XCreateGC( v->display, window, 0, NULL ); 1141#endif 1142 XMesaSetFunction( v->display, b->gc, GXcopy ); 1143 1144 /* cleargc - for glClear() */ 1145#ifdef XFree86Server 1146 b->cleargc = CreateScratchGC(v->display, window->depth); 1147#else 1148 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1149#endif 1150 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1151 1152 /* 1153 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1154 * Patch contributed by Michael Pichler May 15, 1995. 1155 */ 1156#ifdef XFree86Server 1157 b->swapgc = CreateScratchGC(v->display, window->depth); 1158 { 1159 CARD32 v[1]; 1160 v[0] = FALSE; 1161 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1162 } 1163#else 1164 { 1165 XGCValues gcvalues; 1166 gcvalues.graphics_exposures = False; 1167 b->swapgc = XCreateGC(v->display, window, 1168 GCGraphicsExposures, &gcvalues); 1169 } 1170#endif 1171 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1172 /* 1173 * Set fill style and tile pixmap once for all for HPCR stuff 1174 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1175 * Initialize whole stuff 1176 * Patch contributed by Jacques Leroy March 8, 1998. 1177 */ 1178 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { 1179 int i; 1180 for (i = 0; i < 16; i++) { 1181 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1182 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1183 } 1184 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1185 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1186 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1187 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1188 } 1189 1190 /* Initialize the row buffer XImage for use in write_color_span() */ 1191 data = (char*) MALLOC(MAX_WIDTH*4); 1192#ifdef XFree86Server 1193 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data); 1194#else 1195 b->rowimage = XCreateImage( v->display, 1196 v->visinfo->visual, 1197 v->visinfo->depth, 1198 ZPixmap, 0, /*format, offset*/ 1199 data, /*data*/ 1200 MAX_WIDTH, 1, /*width, height*/ 1201 32, /*bitmap_pad*/ 1202 0 /*bytes_per_line*/ ); 1203#endif 1204 if (!b->rowimage) 1205 return GL_FALSE; 1206 } 1207 1208 return GL_TRUE; 1209} 1210 1211 1212 1213/* 1214 * Convert an RGBA color to a pixel value. 1215 */ 1216unsigned long 1217xmesa_color_to_pixel(GLcontext *ctx, 1218 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1219 GLuint pixelFormat) 1220{ 1221 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1222 switch (pixelFormat) { 1223 case PF_Index: 1224 return 0; 1225 case PF_Truecolor: 1226 { 1227 unsigned long p; 1228 PACK_TRUECOLOR( p, r, g, b ); 1229 return p; 1230 } 1231 case PF_8A8B8G8R: 1232 return PACK_8A8B8G8R( r, g, b, a ); 1233 case PF_8A8R8G8B: 1234 return PACK_8A8R8G8B( r, g, b, a ); 1235 case PF_8R8G8B: 1236 /* fall through */ 1237 case PF_8R8G8B24: 1238 return PACK_8R8G8B( r, g, b ); 1239 case PF_5R6G5B: 1240 return PACK_5R6G5B( r, g, b ); 1241 case PF_Dither: 1242 { 1243 DITHER_SETUP; 1244 return DITHER( 1, 0, r, g, b ); 1245 } 1246 case PF_1Bit: 1247 /* 382 = (3*255)/2 */ 1248 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1249 case PF_HPCR: 1250 return DITHER_HPCR(1, 1, r, g, b); 1251 case PF_Lookup: 1252 { 1253 LOOKUP_SETUP; 1254 return LOOKUP( r, g, b ); 1255 } 1256 case PF_Grayscale: 1257 return GRAY_RGB( r, g, b ); 1258 case PF_Dither_True: 1259 /* fall through */ 1260 case PF_Dither_5R6G5B: 1261 { 1262 unsigned long p; 1263 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1264 return p; 1265 } 1266 default: 1267 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1268 } 1269 return 0; 1270} 1271 1272 1273#define NUM_VISUAL_TYPES 6 1274 1275/** 1276 * Convert an X visual type to a GLX visual type. 1277 * 1278 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1279 * to be converted. 1280 * \return If \c visualType is a valid X visual type, a GLX visual type will 1281 * be returned. Otherwise \c GLX_NONE will be returned. 1282 * 1283 * \note 1284 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1285 * DRI CVS tree. 1286 */ 1287static GLint 1288xmesa_convert_from_x_visual_type( int visualType ) 1289{ 1290 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1291 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1292 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1293 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1294 }; 1295 1296 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1297 ? glx_visual_types[ visualType ] : GLX_NONE; 1298} 1299 1300 1301/**********************************************************************/ 1302/***** Public Functions *****/ 1303/**********************************************************************/ 1304 1305 1306/* 1307 * Create a new X/Mesa visual. 1308 * Input: display - X11 display 1309 * visinfo - an XVisualInfo pointer 1310 * rgb_flag - GL_TRUE = RGB mode, 1311 * GL_FALSE = color index mode 1312 * alpha_flag - alpha buffer requested? 1313 * db_flag - GL_TRUE = double-buffered, 1314 * GL_FALSE = single buffered 1315 * stereo_flag - stereo visual? 1316 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1317 * GL_FALSE = use an off-screen pixmap for back buffer 1318 * depth_size - requested bits/depth values, or zero 1319 * stencil_size - requested bits/stencil values, or zero 1320 * accum_red_size - requested bits/red accum values, or zero 1321 * accum_green_size - requested bits/green accum values, or zero 1322 * accum_blue_size - requested bits/blue accum values, or zero 1323 * accum_alpha_size - requested bits/alpha accum values, or zero 1324 * num_samples - number of samples/pixel if multisampling, or zero 1325 * level - visual level, usually 0 1326 * visualCaveat - ala the GLX extension, usually GLX_NONE 1327 * Return; a new XMesaVisual or 0 if error. 1328 */ 1329PUBLIC 1330XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1331 XMesaVisualInfo visinfo, 1332 GLboolean rgb_flag, 1333 GLboolean alpha_flag, 1334 GLboolean db_flag, 1335 GLboolean stereo_flag, 1336 GLboolean ximage_flag, 1337 GLint depth_size, 1338 GLint stencil_size, 1339 GLint accum_red_size, 1340 GLint accum_green_size, 1341 GLint accum_blue_size, 1342 GLint accum_alpha_size, 1343 GLint num_samples, 1344 GLint level, 1345 GLint visualCaveat ) 1346{ 1347 char *gamma; 1348 XMesaVisual v; 1349 GLint red_bits, green_bits, blue_bits, alpha_bits; 1350 1351#ifndef XFree86Server 1352 /* For debugging only */ 1353 if (_mesa_getenv("MESA_XSYNC")) { 1354 /* This makes debugging X easier. 1355 * In your debugger, set a breakpoint on _XError to stop when an 1356 * X protocol error is generated. 1357 */ 1358 XSynchronize( display, 1 ); 1359 } 1360#endif 1361 1362 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1363 if (!v) { 1364 return NULL; 1365 } 1366 1367 v->display = display; 1368 1369 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 1370 * the struct but we may need some of the information contained in it 1371 * at a later time. 1372 */ 1373#ifndef XFree86Server 1374 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1375 if(!v->visinfo) { 1376 _mesa_free(v); 1377 return NULL; 1378 } 1379 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1380#endif 1381 1382 /* check for MESA_GAMMA environment variable */ 1383 gamma = _mesa_getenv("MESA_GAMMA"); 1384 if (gamma) { 1385 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1386 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1387 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1388 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1389 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1390 } 1391 else { 1392 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1393 } 1394 1395 v->ximage_flag = ximage_flag; 1396 1397#ifdef XFree86Server 1398 /* We could calculate these values by ourselves. nplanes is either the sum 1399 * of the red, green, and blue bits or the number index bits. 1400 * ColormapEntries is either (1U << index_bits) or 1401 * (1U << max(redBits, greenBits, blueBits)). 1402 */ 1403 assert(visinfo->nplanes > 0); 1404 v->nplanes = visinfo->nplanes; 1405 v->ColormapEntries = visinfo->ColormapEntries; 1406 1407 v->mesa_visual.redMask = visinfo->redMask; 1408 v->mesa_visual.greenMask = visinfo->greenMask; 1409 v->mesa_visual.blueMask = visinfo->blueMask; 1410 v->mesa_visual.visualID = visinfo->vid; 1411 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1412#else 1413 v->mesa_visual.redMask = visinfo->red_mask; 1414 v->mesa_visual.greenMask = visinfo->green_mask; 1415 v->mesa_visual.blueMask = visinfo->blue_mask; 1416 v->mesa_visual.visualID = visinfo->visualid; 1417 v->mesa_visual.screen = visinfo->screen; 1418#endif 1419 1420#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1421 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1422#else 1423 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1424#endif 1425 1426 v->mesa_visual.visualRating = visualCaveat; 1427 1428 if (alpha_flag) 1429 v->mesa_visual.alphaBits = 8; 1430 1431 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 ); 1432 1433 { 1434 const int xclass = v->mesa_visual.visualType; 1435 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1436 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1437 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1438 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1439 } 1440 else { 1441 /* this is an approximation */ 1442 int depth; 1443 depth = GET_VISUAL_DEPTH(v); 1444 red_bits = depth / 3; 1445 depth -= red_bits; 1446 green_bits = depth / 2; 1447 depth -= green_bits; 1448 blue_bits = depth; 1449 alpha_bits = 0; 1450 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1451 } 1452 alpha_bits = v->mesa_visual.alphaBits; 1453 } 1454 1455 _mesa_initialize_visual( &v->mesa_visual, 1456 rgb_flag, db_flag, stereo_flag, 1457 red_bits, green_bits, 1458 blue_bits, alpha_bits, 1459 v->mesa_visual.indexBits, 1460 depth_size, 1461 stencil_size, 1462 accum_red_size, accum_green_size, 1463 accum_blue_size, accum_alpha_size, 1464 0 ); 1465 1466 /* XXX minor hack */ 1467 v->mesa_visual.level = level; 1468 return v; 1469} 1470 1471 1472PUBLIC 1473void XMesaDestroyVisual( XMesaVisual v ) 1474{ 1475#ifndef XFree86Server 1476 _mesa_free(v->visinfo); 1477#endif 1478 _mesa_free(v); 1479} 1480 1481 1482 1483/** 1484 * Create a new XMesaContext. 1485 * \param v the XMesaVisual 1486 * \param share_list another XMesaContext with which to share display 1487 * lists or NULL if no sharing is wanted. 1488 * \return an XMesaContext or NULL if error. 1489 */ 1490PUBLIC 1491XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1492{ 1493 static GLboolean firstTime = GL_TRUE; 1494 XMesaContext c; 1495 GLcontext *mesaCtx; 1496 struct dd_function_table functions; 1497 TNLcontext *tnl; 1498 1499 if (firstTime) { 1500 _glthread_INIT_MUTEX(_xmesa_lock); 1501 firstTime = GL_FALSE; 1502 } 1503 1504 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1505 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1506 if (!c) 1507 return NULL; 1508 1509 mesaCtx = &(c->mesa); 1510 1511 /* initialize with default driver functions, then plug in XMesa funcs */ 1512 _mesa_init_driver_functions(&functions); 1513 xmesa_init_driver_functions(v, &functions); 1514 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1515 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1516 &functions, (void *) c)) { 1517 _mesa_free(c); 1518 return NULL; 1519 } 1520 1521 _mesa_enable_sw_extensions(mesaCtx); 1522 _mesa_enable_1_3_extensions(mesaCtx); 1523 _mesa_enable_1_4_extensions(mesaCtx); 1524 _mesa_enable_1_5_extensions(mesaCtx); 1525 _mesa_enable_2_0_extensions(mesaCtx); 1526#if ENABLE_EXT_texure_compression_s3tc 1527 if (c->Mesa_DXTn) { 1528 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1529 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1530 } 1531 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1532#endif 1533#if ENABLE_EXT_timer_query 1534 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1535#endif 1536 1537#ifdef XFree86Server 1538 /* If we're running in the X server, do bounds checking to prevent 1539 * segfaults and server crashes! 1540 */ 1541 mesaCtx->Const.CheckArrayBounds = GL_TRUE; 1542#endif 1543 1544 /* finish up xmesa context initializations */ 1545 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1546 c->xm_visual = v; 1547 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1548 c->display = v->display; 1549 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1550 1551 /* Initialize the software rasterizer and helper modules. 1552 */ 1553 if (!_swrast_CreateContext( mesaCtx ) || 1554 !_vbo_CreateContext( mesaCtx ) || 1555 !_tnl_CreateContext( mesaCtx ) || 1556 !_swsetup_CreateContext( mesaCtx )) { 1557 _mesa_free_context_data(&c->mesa); 1558 _mesa_free(c); 1559 return NULL; 1560 } 1561 1562 /* tnl setup */ 1563 tnl = TNL_CONTEXT(mesaCtx); 1564 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1565 /* swrast setup */ 1566 xmesa_register_swrast_functions( mesaCtx ); 1567 _swsetup_Wakeup(mesaCtx); 1568 1569 return c; 1570} 1571 1572 1573 1574PUBLIC 1575void XMesaDestroyContext( XMesaContext c ) 1576{ 1577 GLcontext *mesaCtx = &c->mesa; 1578 1579#ifdef FX 1580 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) ); 1581#endif 1582 1583 _swsetup_DestroyContext( mesaCtx ); 1584 _swrast_DestroyContext( mesaCtx ); 1585 _tnl_DestroyContext( mesaCtx ); 1586 _vbo_DestroyContext( mesaCtx ); 1587 _mesa_free_context_data( mesaCtx ); 1588 _mesa_free( c ); 1589} 1590 1591 1592 1593/** 1594 * Private function for creating an XMesaBuffer which corresponds to an 1595 * X window or pixmap. 1596 * \param v the window's XMesaVisual 1597 * \param w the window we're wrapping 1598 * \return new XMesaBuffer or NULL if error 1599 */ 1600PUBLIC XMesaBuffer 1601XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1602{ 1603#ifndef XFree86Server 1604 XWindowAttributes attr; 1605#endif 1606 XMesaBuffer b; 1607 XMesaColormap cmap; 1608 int depth; 1609 1610 assert(v); 1611 assert(w); 1612 1613 /* Check that window depth matches visual depth */ 1614#ifdef XFree86Server 1615 depth = ((XMesaDrawable)w)->depth; 1616#else 1617 XGetWindowAttributes( v->display, w, &attr ); 1618 depth = attr.depth; 1619#endif 1620 if (GET_VISUAL_DEPTH(v) != depth) { 1621 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1622 GET_VISUAL_DEPTH(v), depth); 1623 return NULL; 1624 } 1625 1626 /* Find colormap */ 1627#ifdef XFree86Server 1628 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1629#else 1630 if (attr.colormap) { 1631 cmap = attr.colormap; 1632 } 1633 else { 1634 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1635 /* this is weird, a window w/out a colormap!? */ 1636 /* OK, let's just allocate a new one and hope for the best */ 1637 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1638 } 1639#endif 1640 1641 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1642 if (!b) 1643 return NULL; 1644 1645 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode, 1646 (XMesaDrawable) w, cmap )) { 1647 xmesa_free_buffer(b); 1648 return NULL; 1649 } 1650 1651 return b; 1652} 1653 1654 1655 1656/** 1657 * Create a new XMesaBuffer from an X pixmap. 1658 * 1659 * \param v the XMesaVisual 1660 * \param p the pixmap 1661 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1662 * \c GLX_DIRECT_COLOR visual for the pixmap 1663 * \returns new XMesaBuffer or NULL if error 1664 */ 1665PUBLIC XMesaBuffer 1666XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1667{ 1668 XMesaBuffer b; 1669 1670 assert(v); 1671 1672 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1673 if (!b) 1674 return NULL; 1675 1676 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1677 (XMesaDrawable) p, cmap)) { 1678 xmesa_free_buffer(b); 1679 return NULL; 1680 } 1681 1682 return b; 1683} 1684 1685 1686/** 1687 * For GLX_EXT_texture_from_pixmap 1688 */ 1689XMesaBuffer 1690XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p, 1691 XMesaColormap cmap, 1692 int format, int target, int mipmap) 1693{ 1694 GET_CURRENT_CONTEXT(ctx); 1695 XMesaBuffer b; 1696 GLuint width, height; 1697 1698 assert(v); 1699 1700 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1701 if (!b) 1702 return NULL; 1703 1704 /* get pixmap size, update framebuffer/renderbuffer dims */ 1705 xmesa_get_window_size(v->display, b, &width, &height); 1706 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height); 1707 1708 if (target == 0) { 1709 /* examine dims */ 1710 if (ctx->Extensions.ARB_texture_non_power_of_two) { 1711 target = GLX_TEXTURE_2D_EXT; 1712 } 1713 else if ( _mesa_bitcount(width) == 1 1714 && _mesa_bitcount(height) == 1) { 1715 /* power of two size */ 1716 if (height == 1) { 1717 target = GLX_TEXTURE_1D_EXT; 1718 } 1719 else { 1720 target = GLX_TEXTURE_2D_EXT; 1721 } 1722 } 1723 else if (ctx->Extensions.NV_texture_rectangle) { 1724 target = GLX_TEXTURE_RECTANGLE_EXT; 1725 } 1726 else { 1727 /* non power of two textures not supported */ 1728 XMesaDestroyBuffer(b); 1729 return 0; 1730 } 1731 } 1732 1733 b->TextureTarget = target; 1734 b->TextureFormat = format; 1735 b->TextureMipmap = mipmap; 1736 1737 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1738 (XMesaDrawable) p, cmap)) { 1739 xmesa_free_buffer(b); 1740 return NULL; 1741 } 1742 1743 return b; 1744} 1745 1746 1747 1748XMesaBuffer 1749XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1750 unsigned int width, unsigned int height) 1751{ 1752#ifndef XFree86Server 1753 XMesaWindow root; 1754 XMesaDrawable drawable; /* X Pixmap Drawable */ 1755 XMesaBuffer b; 1756 1757 /* allocate pixmap for front buffer */ 1758 root = RootWindow( v->display, v->visinfo->screen ); 1759 drawable = XCreatePixmap(v->display, root, width, height, 1760 v->visinfo->depth); 1761 if (!drawable) 1762 return NULL; 1763 1764 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1765 if (!b) 1766 return NULL; 1767 1768 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode, 1769 drawable, cmap)) { 1770 xmesa_free_buffer(b); 1771 return NULL; 1772 } 1773 1774 return b; 1775#else 1776 return 0; 1777#endif 1778} 1779 1780 1781 1782/* 1783 * Deallocate an XMesaBuffer structure and all related info. 1784 */ 1785PUBLIC void 1786XMesaDestroyBuffer(XMesaBuffer b) 1787{ 1788 xmesa_free_buffer(b); 1789} 1790 1791 1792/** 1793 * Query the current window size and update the corresponding GLframebuffer 1794 * and all attached renderbuffers. 1795 * Called when: 1796 * 1. the first time a buffer is bound to a context. 1797 * 2. from glViewport to poll for window size changes 1798 * 3. from the XMesaResizeBuffers() API function. 1799 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1800 * when resizing a buffer when no rendering context is bound. 1801 */ 1802void 1803xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1804{ 1805 GLuint width, height; 1806 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1807 if (drawBuffer->mesa_buffer.Width != width || 1808 drawBuffer->mesa_buffer.Height != height) { 1809 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL; 1810 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1811 } 1812 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1813} 1814 1815 1816/* 1817 * Bind buffer b to context c and make c the current rendering context. 1818 */ 1819GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1820{ 1821 return XMesaMakeCurrent2( c, b, b ); 1822} 1823 1824 1825/* 1826 * Bind buffer b to context c and make c the current rendering context. 1827 */ 1828PUBLIC 1829GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1830 XMesaBuffer readBuffer ) 1831{ 1832 if (c) { 1833 if (!drawBuffer || !readBuffer) 1834 return GL_FALSE; /* must specify buffers! */ 1835 1836 if (&(c->mesa) == _mesa_get_current_context() 1837 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1838 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1839 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1840 /* same context and buffer, do nothing */ 1841 return GL_TRUE; 1842 } 1843 1844 c->xm_buffer = drawBuffer; 1845 1846#ifdef FX 1847 if (FXmakeCurrent( drawBuffer )) 1848 return GL_TRUE; 1849#endif 1850 1851 /* Call this periodically to detect when the user has begun using 1852 * GL rendering from multiple threads. 1853 */ 1854 _glapi_check_multithread(); 1855 1856 xmesa_check_and_update_buffer_size(c, drawBuffer); 1857 if (readBuffer != drawBuffer) 1858 xmesa_check_and_update_buffer_size(c, readBuffer); 1859 1860 _mesa_make_current(&(c->mesa), 1861 &drawBuffer->mesa_buffer, 1862 &readBuffer->mesa_buffer); 1863 1864 if (c->xm_visual->mesa_visual.rgbMode) { 1865 /* 1866 * Must recompute and set these pixel values because colormap 1867 * can be different for different windows. 1868 */ 1869 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1870 c->clearcolor[0], 1871 c->clearcolor[1], 1872 c->clearcolor[2], 1873 c->clearcolor[3], 1874 c->xm_visual->undithered_pf); 1875 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1876 } 1877 1878 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1879 drawBuffer->wasCurrent = GL_TRUE; 1880 } 1881 else { 1882 /* Detach */ 1883 _mesa_make_current( NULL, NULL, NULL ); 1884 } 1885 return GL_TRUE; 1886} 1887 1888 1889/* 1890 * Unbind the context c from its buffer. 1891 */ 1892GLboolean XMesaUnbindContext( XMesaContext c ) 1893{ 1894 /* A no-op for XFree86 integration purposes */ 1895 return GL_TRUE; 1896} 1897 1898 1899XMesaContext XMesaGetCurrentContext( void ) 1900{ 1901 GET_CURRENT_CONTEXT(ctx); 1902 if (ctx) { 1903 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1904 return xmesa; 1905 } 1906 else { 1907 return 0; 1908 } 1909} 1910 1911 1912XMesaBuffer XMesaGetCurrentBuffer( void ) 1913{ 1914 GET_CURRENT_CONTEXT(ctx); 1915 if (ctx) { 1916 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1917 return xmbuf; 1918 } 1919 else { 1920 return 0; 1921 } 1922} 1923 1924 1925/* New in Mesa 3.1 */ 1926XMesaBuffer XMesaGetCurrentReadBuffer( void ) 1927{ 1928 GET_CURRENT_CONTEXT(ctx); 1929 if (ctx) { 1930 return XMESA_BUFFER(ctx->ReadBuffer); 1931 } 1932 else { 1933 return 0; 1934 } 1935} 1936 1937 1938#ifdef XFree86Server 1939PUBLIC 1940GLboolean XMesaForceCurrent(XMesaContext c) 1941{ 1942 if (c) { 1943 _glapi_set_dispatch(c->mesa.CurrentDispatch); 1944 1945 if (&(c->mesa) != _mesa_get_current_context()) { 1946 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 1947 } 1948 } 1949 else { 1950 _mesa_make_current(NULL, NULL, NULL); 1951 } 1952 return GL_TRUE; 1953} 1954 1955 1956PUBLIC 1957GLboolean XMesaLoseCurrent(XMesaContext c) 1958{ 1959 (void) c; 1960 _mesa_make_current(NULL, NULL, NULL); 1961 return GL_TRUE; 1962} 1963 1964 1965PUBLIC 1966GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask ) 1967{ 1968 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask); 1969 return GL_TRUE; 1970} 1971#endif /* XFree86Server */ 1972 1973 1974#ifndef FX 1975GLboolean XMesaSetFXmode( GLint mode ) 1976{ 1977 (void) mode; 1978 return GL_FALSE; 1979} 1980#endif 1981 1982 1983 1984/* 1985 * Copy the back buffer to the front buffer. If there's no back buffer 1986 * this is a no-op. 1987 */ 1988PUBLIC 1989void XMesaSwapBuffers( XMesaBuffer b ) 1990{ 1991 GET_CURRENT_CONTEXT(ctx); 1992 1993 if (!b->backxrb) { 1994 /* single buffered */ 1995 return; 1996 } 1997 1998 /* If we're swapping the buffer associated with the current context 1999 * we have to flush any pending rendering commands first. 2000 */ 2001 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2002 _mesa_notifySwapBuffers(ctx); 2003 2004 if (b->db_mode) { 2005#ifdef FX 2006 if (FXswapBuffers(b)) 2007 return; 2008#endif 2009 if (b->backxrb->ximage) { 2010 /* Copy Ximage (back buf) from client memory to server window */ 2011#if defined(USE_XSHM) && !defined(XFree86Server) 2012 if (b->shm) { 2013 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2014 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2015 b->swapgc, 2016 b->backxrb->ximage, 0, 0, 2017 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2018 False ); 2019 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2020 } 2021 else 2022#endif 2023 { 2024 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2025 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2026 b->swapgc, 2027 b->backxrb->ximage, 0, 0, 2028 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2029 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2030 } 2031 } 2032 else if (b->backxrb->pixmap) { 2033 /* Copy pixmap (back buf) to window (front buf) on server */ 2034 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2035 XMesaCopyArea( b->xm_visual->display, 2036 b->backxrb->pixmap, /* source drawable */ 2037 b->frontxrb->drawable, /* dest. drawable */ 2038 b->swapgc, 2039 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2040 0, 0 /* dest region */ 2041 ); 2042 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2043 } 2044 2045 if (b->swAlpha) 2046 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); 2047 } 2048#if !defined(XFree86Server) 2049 XSync( b->xm_visual->display, False ); 2050#endif 2051} 2052 2053 2054 2055/* 2056 * Copy sub-region of back buffer to front buffer 2057 */ 2058void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2059{ 2060 GET_CURRENT_CONTEXT(ctx); 2061 2062 /* If we're swapping the buffer associated with the current context 2063 * we have to flush any pending rendering commands first. 2064 */ 2065 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2066 _mesa_notifySwapBuffers(ctx); 2067 2068 if (!b->backxrb) { 2069 /* single buffered */ 2070 return; 2071 } 2072 2073 if (b->db_mode) { 2074 int yTop = b->mesa_buffer.Height - y - height; 2075#ifdef FX 2076 if (FXswapBuffers(b)) 2077 return; 2078#endif 2079 if (b->backxrb->ximage) { 2080 /* Copy Ximage from host's memory to server's window */ 2081#if defined(USE_XSHM) && !defined(XFree86Server) 2082 if (b->shm) { 2083 /* XXX assuming width and height aren't too large! */ 2084 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2085 b->swapgc, 2086 b->backxrb->ximage, x, yTop, 2087 x, yTop, width, height, False ); 2088 /* wait for finished event??? */ 2089 } 2090 else 2091#endif 2092 { 2093 /* XXX assuming width and height aren't too large! */ 2094 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2095 b->swapgc, 2096 b->backxrb->ximage, x, yTop, 2097 x, yTop, width, height ); 2098 } 2099 } 2100 else { 2101 /* Copy pixmap to window on server */ 2102 XMesaCopyArea( b->xm_visual->display, 2103 b->backxrb->pixmap, /* source drawable */ 2104 b->frontxrb->drawable, /* dest. drawable */ 2105 b->swapgc, 2106 x, yTop, width, height, /* source region */ 2107 x, yTop /* dest region */ 2108 ); 2109 } 2110 } 2111} 2112 2113 2114/* 2115 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2116 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2117 * back buffer directly. 2118 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2119 * ximage - pointer to back buffer's XImage, or NULL 2120 * Return: GL_TRUE = context is double buffered 2121 * GL_FALSE = context is single buffered 2122 */ 2123#ifndef XFree86Server 2124GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2125 XMesaPixmap *pixmap, 2126 XMesaImage **ximage ) 2127{ 2128 if (b->db_mode) { 2129 if (pixmap) 2130 *pixmap = b->backxrb->pixmap; 2131 if (ximage) 2132 *ximage = b->backxrb->ximage; 2133 return GL_TRUE; 2134 } 2135 else { 2136 *pixmap = 0; 2137 *ximage = NULL; 2138 return GL_FALSE; 2139 } 2140} 2141#endif /* XFree86Server */ 2142 2143 2144/* 2145 * Return the depth buffer associated with an XMesaBuffer. 2146 * Input: b - the XMesa buffer handle 2147 * Output: width, height - size of buffer in pixels 2148 * bytesPerValue - bytes per depth value (2 or 4) 2149 * buffer - pointer to depth buffer values 2150 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2151 */ 2152GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2153 GLint *bytesPerValue, void **buffer ) 2154{ 2155 struct gl_renderbuffer *rb 2156 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2157 if (!rb || !rb->Data) { 2158 *width = 0; 2159 *height = 0; 2160 *bytesPerValue = 0; 2161 *buffer = 0; 2162 return GL_FALSE; 2163 } 2164 else { 2165 *width = b->mesa_buffer.Width; 2166 *height = b->mesa_buffer.Height; 2167 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2168 ? sizeof(GLushort) : sizeof(GLuint); 2169 *buffer = rb->Data; 2170 return GL_TRUE; 2171 } 2172} 2173 2174 2175void XMesaFlush( XMesaContext c ) 2176{ 2177 if (c && c->xm_visual) { 2178#ifdef XFree86Server 2179 /* NOT_NEEDED */ 2180#else 2181 XSync( c->xm_visual->display, False ); 2182#endif 2183 } 2184} 2185 2186 2187 2188const char *XMesaGetString( XMesaContext c, int name ) 2189{ 2190 (void) c; 2191 if (name==XMESA_VERSION) { 2192 return "5.0"; 2193 } 2194 else if (name==XMESA_EXTENSIONS) { 2195 return ""; 2196 } 2197 else { 2198 return NULL; 2199 } 2200} 2201 2202 2203 2204XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2205{ 2206 XMesaBuffer b; 2207 for (b=XMesaBufferList; b; b=b->Next) { 2208 if (b->frontxrb->drawable == d && b->display == dpy) { 2209 return b; 2210 } 2211 } 2212 return NULL; 2213} 2214 2215 2216/** 2217 * Free/destroy all XMesaBuffers associated with given display. 2218 */ 2219void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 2220{ 2221 XMesaBuffer b, next; 2222 for (b = XMesaBufferList; b; b = next) { 2223 next = b->Next; 2224 if (b->display == dpy) { 2225 xmesa_free_buffer(b); 2226 } 2227 } 2228} 2229 2230 2231/* 2232 * Look for XMesaBuffers whose X window has been destroyed. 2233 * Deallocate any such XMesaBuffers. 2234 */ 2235void XMesaGarbageCollect( void ) 2236{ 2237 XMesaBuffer b, next; 2238 for (b=XMesaBufferList; b; b=next) { 2239 next = b->Next; 2240 if (b->display && b->frontxrb->drawable && b->type == WINDOW) { 2241#ifdef XFree86Server 2242 /* NOT_NEEDED */ 2243#else 2244 XSync(b->display, False); 2245 if (!window_exists( b->display, b->frontxrb->drawable )) { 2246 /* found a dead window, free the ancillary info */ 2247 XMesaDestroyBuffer( b ); 2248 } 2249#endif 2250 } 2251 } 2252} 2253 2254 2255unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2256 GLfloat red, GLfloat green, 2257 GLfloat blue, GLfloat alpha ) 2258{ 2259 GLcontext *ctx = &xmesa->mesa; 2260 GLint r = (GLint) (red * 255.0F); 2261 GLint g = (GLint) (green * 255.0F); 2262 GLint b = (GLint) (blue * 255.0F); 2263 GLint a = (GLint) (alpha * 255.0F); 2264 2265 switch (xmesa->pixelformat) { 2266 case PF_Index: 2267 return 0; 2268 case PF_Truecolor: 2269 { 2270 unsigned long p; 2271 PACK_TRUECOLOR( p, r, g, b ); 2272 return p; 2273 } 2274 case PF_8A8B8G8R: 2275 return PACK_8A8B8G8R( r, g, b, a ); 2276 case PF_8A8R8G8B: 2277 return PACK_8A8R8G8B( r, g, b, a ); 2278 case PF_8R8G8B: 2279 return PACK_8R8G8B( r, g, b ); 2280 case PF_5R6G5B: 2281 return PACK_5R6G5B( r, g, b ); 2282 case PF_Dither: 2283 { 2284 DITHER_SETUP; 2285 return DITHER( x, y, r, g, b ); 2286 } 2287 case PF_1Bit: 2288 /* 382 = (3*255)/2 */ 2289 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2290 case PF_HPCR: 2291 return DITHER_HPCR(x, y, r, g, b); 2292 case PF_Lookup: 2293 { 2294 LOOKUP_SETUP; 2295 return LOOKUP( r, g, b ); 2296 } 2297 case PF_Grayscale: 2298 return GRAY_RGB( r, g, b ); 2299 case PF_Dither_5R6G5B: 2300 /* fall through */ 2301 case PF_Dither_True: 2302 { 2303 unsigned long p; 2304 PACK_TRUEDITHER(p, x, y, r, g, b); 2305 return p; 2306 } 2307 default: 2308 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2309 } 2310 return 0; 2311} 2312 2313 2314/* 2315 * This is typically called when the window size changes and we need 2316 * to reallocate the buffer's back/depth/stencil/accum buffers. 2317 */ 2318PUBLIC void 2319XMesaResizeBuffers( XMesaBuffer b ) 2320{ 2321 GET_CURRENT_CONTEXT(ctx); 2322 XMesaContext xmctx = XMESA_CONTEXT(ctx); 2323 if (!xmctx) 2324 return; 2325 xmesa_check_and_update_buffer_size(xmctx, b); 2326} 2327 2328 2329static GLint 2330xbuffer_to_renderbuffer(int buffer) 2331{ 2332 assert(MAX_AUX_BUFFERS <= 4); 2333 2334 switch (buffer) { 2335 case GLX_FRONT_LEFT_EXT: 2336 return BUFFER_FRONT_LEFT; 2337 case GLX_FRONT_RIGHT_EXT: 2338 return BUFFER_FRONT_RIGHT; 2339 case GLX_BACK_LEFT_EXT: 2340 return BUFFER_BACK_LEFT; 2341 case GLX_BACK_RIGHT_EXT: 2342 return BUFFER_BACK_RIGHT; 2343 case GLX_AUX0_EXT: 2344 return BUFFER_AUX0; 2345 case GLX_AUX1_EXT: 2346 return BUFFER_AUX1; 2347 case GLX_AUX2_EXT: 2348 return BUFFER_AUX2; 2349 case GLX_AUX3_EXT: 2350 return BUFFER_AUX3; 2351 case GLX_AUX4_EXT: 2352 case GLX_AUX5_EXT: 2353 case GLX_AUX6_EXT: 2354 case GLX_AUX7_EXT: 2355 case GLX_AUX8_EXT: 2356 case GLX_AUX9_EXT: 2357 default: 2358 /* BadValue error */ 2359 return -1; 2360 } 2361} 2362 2363 2364PUBLIC void 2365XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer, 2366 const int *attrib_list) 2367{ 2368#if 0 2369 GET_CURRENT_CONTEXT(ctx); 2370 const GLuint unit = ctx->Texture.CurrentUnit; 2371 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; 2372 struct gl_texture_object *texObj; 2373#endif 2374 struct gl_renderbuffer *rb; 2375 struct xmesa_renderbuffer *xrb; 2376 GLint b; 2377 XMesaImage *img = NULL; 2378 GLboolean freeImg = GL_FALSE; 2379 2380 b = xbuffer_to_renderbuffer(buffer); 2381 if (b < 0) 2382 return; 2383 2384 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT) 2385 return; /* BadMatch error */ 2386 2387 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer; 2388 if (!rb) { 2389 /* invalid buffer */ 2390 return; 2391 } 2392 xrb = xmesa_renderbuffer(rb); 2393 2394#if 0 2395 switch (drawable->TextureTarget) { 2396 case GLX_TEXTURE_1D_EXT: 2397 texObj = texUnit->Current1D; 2398 break; 2399 case GLX_TEXTURE_2D_EXT: 2400 texObj = texUnit->Current2D; 2401 break; 2402 case GLX_TEXTURE_RECTANGLE_EXT: 2403 texObj = texUnit->CurrentRect; 2404 break; 2405 default: 2406 return; /* BadMatch error */ 2407 } 2408#endif 2409 2410 /* 2411 * The following is a quick and simple way to implement 2412 * BindTexImage. The better way is to write some new FetchTexel() 2413 * functions which would extract texels from XImages. We'd still 2414 * need to use GetImage when texturing from a Pixmap (front buffer) 2415 * but texturing from a back buffer (XImage) would avoid an image 2416 * copy. 2417 */ 2418 2419 /* get XImage */ 2420 if (xrb->pixmap) { 2421 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L, 2422 ZPixmap); 2423 freeImg = GL_TRUE; 2424 } 2425 else if (xrb->ximage) { 2426 img = xrb->ximage; 2427 } 2428 2429 /* store the XImage as a new texture image */ 2430 if (img) { 2431 GLenum format, type, intFormat; 2432 if (img->bits_per_pixel == 32) { 2433 format = GL_BGRA; 2434 type = GL_UNSIGNED_BYTE; 2435 intFormat = GL_RGBA; 2436 } 2437 else if (img->bits_per_pixel == 24) { 2438 format = GL_BGR; 2439 type = GL_UNSIGNED_BYTE; 2440 intFormat = GL_RGB; 2441 } 2442 else if (img->bits_per_pixel == 16) { 2443 format = GL_BGR; 2444 type = GL_UNSIGNED_SHORT_5_6_5; 2445 intFormat = GL_RGB; 2446 } 2447 else { 2448 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage"); 2449 return; 2450 } 2451 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) { 2452 intFormat = GL_RGBA; 2453 } 2454 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) { 2455 intFormat = GL_RGB; 2456 } 2457 2458 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0, 2459 format, type, img->data); 2460 2461 if (freeImg) { 2462 XMesaDestroyImage(img); 2463 } 2464 } 2465} 2466 2467 2468 2469PUBLIC void 2470XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer) 2471{ 2472 const GLint b = xbuffer_to_renderbuffer(buffer); 2473 if (b < 0) 2474 return; 2475 2476 /* no-op for now */ 2477} 2478 2479