xm_api.c revision b20cea3902122565f843e689ef4f6ab139ed69cf
1/* $Id: xm_api.c,v 1.24 2001/06/04 22:33:02 brianp Exp $ */ 2 3/* 4 * Mesa 3-D graphics library 5 * Version: 3.5 6 * 7 * Copyright (C) 1999-2000 Brian Paul All Rights Reserved. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included 17 * in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 */ 26 27 28/* 29 * This file contains the implementations of all the XMesa* functions. 30 * 31 * 32 * NOTES: 33 * 34 * The window coordinate system origin (0,0) is in the lower-left corner 35 * of the window. X11's window coordinate origin is in the upper-left 36 * corner of the window. Therefore, most drawing functions in this 37 * file have to flip Y coordinates. 38 * 39 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 40 * in support for the MIT Shared Memory extension. If enabled, when you 41 * use an Ximage for the back buffer in double buffered mode, the "swap" 42 * operation will be faster. You must also link with -lXext. 43 * 44 * Byte swapping: If the Mesa host and the X display use a different 45 * byte order then there's some trickiness to be aware of when using 46 * XImages. The byte ordering used for the XImage is that of the X 47 * display, not the Mesa host. 48 * The color-to-pixel encoding for True/DirectColor must be done 49 * according to the display's visual red_mask, green_mask, and blue_mask. 50 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 51 * do byte swapping if needed. If one wants to directly "poke" the pixel 52 * into the XImage's buffer then the pixel must be byte swapped first. In 53 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 54 * and use XPutPixel everywhere except in the implementation of 55 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 56 * instead of using XPutPixel we "poke" our values after byte-swapping 57 * the clear pixel value if needed. 58 * 59 */ 60 61#ifdef __CYGWIN__ 62#undef WIN32 63#undef __WIN32__ 64#endif 65 66#include "glxheader.h" 67#include "GL/xmesa.h" 68#include "xmesaP.h" 69#include "context.h" 70#include "extensions.h" 71#include "glthread.h" 72#include "matrix.h" 73#include "mem.h" 74#include "mmath.h" 75#include "mtypes.h" 76#ifdef HAVE_CONFIG_H 77#include "conf.h" 78#endif 79#include "macros.h" 80#include "swrast/swrast.h" 81#include "swrast_setup/swrast_setup.h" 82#include "array_cache/acache.h" 83#include "tnl/tnl.h" 84 85#ifndef GLX_NONE_EXT 86#define GLX_NONE_EXT 0x8000 87#endif 88 89 90/* 91 * Global X driver lock 92 */ 93_glthread_Mutex _xmesa_lock; 94 95 96 97/* 98 * Lookup tables for HPCR pixel format: 99 */ 100static short hpcr_rgbTbl[3][256] = { 101{ 102 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 103 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 104 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 105 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 106 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 107 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 108 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 109 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 110112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 111128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 112144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 113160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 114176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 115192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 116208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 117224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 118}, 119{ 120 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 121 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 122 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 123 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 124 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 125 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 126 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 127 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 128112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 129128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 130144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 131160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 132176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 133192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 134208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 135224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 136}, 137{ 138 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 139 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 140 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 141 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 142 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 143 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 144 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 145 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 146 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 147112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 148128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 149144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 150160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 151176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 152192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 153208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 154} 155}; 156 157 158 159/**********************************************************************/ 160/***** X Utility Functions *****/ 161/**********************************************************************/ 162 163 164/* 165 * X/Mesa error reporting function: 166 */ 167static void error( const char *msg ) 168{ 169 if (getenv("MESA_DEBUG")) 170 fprintf( stderr, "X/Mesa error: %s\n", msg ); 171} 172 173 174/* 175 * Return the host's byte order as LSBFirst or MSBFirst ala X. 176 */ 177#ifndef XFree86Server 178static int host_byte_order( void ) 179{ 180 int i = 1; 181 char *cptr = (char *) &i; 182 return (*cptr==1) ? LSBFirst : MSBFirst; 183} 184#endif 185 186 187/* 188 * Error handling. 189 */ 190#ifndef XFree86Server 191static int mesaXErrorFlag = 0; 192 193static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 194{ 195 (void) dpy; 196 (void) event; 197 mesaXErrorFlag = 1; 198 return 0; 199} 200#endif 201 202 203/* 204 * Check if the X Shared Memory extension is available. 205 * Return: 0 = not available 206 * 1 = shared XImage support available 207 * 2 = shared Pixmap support available also 208 */ 209#ifndef XFree86Server 210static int check_for_xshm( XMesaDisplay *display ) 211{ 212#ifdef USE_XSHM 213 int major, minor, ignore; 214 Bool pixmaps; 215 216 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 217 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 218 return (pixmaps==True) ? 2 : 1; 219 } 220 else { 221 return 0; 222 } 223 } 224 else { 225 return 0; 226 } 227#else 228 /* Can't compile XSHM support */ 229 return 0; 230#endif 231} 232#endif 233 234 235/* 236 * Return the width and height of the given drawable. 237 */ 238static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 239 unsigned int *width, unsigned int *height) 240{ 241#ifdef XFree86Server 242 (void) dpy; 243 *width = d->width; 244 *height = d->height; 245#else 246 Window root; 247 int x, y; 248 unsigned int bw, depth; 249 250 _glthread_LOCK_MUTEX(_xmesa_lock); 251 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 252 _glthread_UNLOCK_MUTEX(_xmesa_lock); 253#endif 254} 255 256 257/* 258 * Apply gamma correction to an intensity value in [0..max]. Return the 259 * new intensity value. 260 */ 261static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 262{ 263 if (gamma == 1.0) { 264 return value; 265 } 266 else { 267 double x = (double) value / (double) max; 268 return IROUND_POS((GLfloat) max * pow(x, 1.0F/gamma)); 269 } 270} 271 272 273 274/* 275 * Return the true number of bits per pixel for XImages. 276 * For example, if we request a 24-bit deep visual we may actually need/get 277 * 32bpp XImages. This function returns the appropriate bpp. 278 * Input: dpy - the X display 279 * visinfo - desribes the visual to be used for XImages 280 * Return: true number of bits per pixel for XImages 281 */ 282#define GET_BITS_PER_PIXEL(xmv) bits_per_pixel(xmv) 283 284#ifdef XFree86Server 285 286static int bits_per_pixel( XMesaVisual xmv ) 287{ 288 XMesaVisualInfo visinfo = xmv->visinfo; 289 const int depth = visinfo->nplanes; 290 int i; 291 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 292 if (screenInfo.formats[i].depth == depth) 293 return screenInfo.formats[i].bitsPerPixel; 294 } 295 return depth; /* should never get here, but this should be safe */ 296} 297 298#else 299 300static int bits_per_pixel( XMesaVisual xmv ) 301{ 302 XMesaDisplay *dpy = xmv->display; 303 XMesaVisualInfo visinfo = xmv->visinfo; 304 XMesaImage *img; 305 int bitsPerPixel; 306 /* Create a temporary XImage */ 307 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 308 ZPixmap, 0, /*format, offset*/ 309 (char*) MALLOC(8), /*data*/ 310 1, 1, /*width, height*/ 311 32, /*bitmap_pad*/ 312 0 /*bytes_per_line*/ 313 ); 314 assert(img); 315 /* grab the bits/pixel value */ 316 bitsPerPixel = img->bits_per_pixel; 317 /* free the XImage */ 318 FREE( img->data ); 319 img->data = NULL; 320 XMesaDestroyImage( img ); 321 return bitsPerPixel; 322} 323#endif 324 325 326 327/* 328 * Determine if a given X window ID is valid (window exists). 329 * Do this by calling XGetWindowAttributes() for the window and 330 * checking if we catch an X error. 331 * Input: dpy - the display 332 * win - the window to check for existance 333 * Return: GL_TRUE - window exists 334 * GL_FALSE - window doesn't exist 335 */ 336#ifndef XFree86Server 337static GLboolean WindowExistsFlag; 338 339static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 340{ 341 (void) dpy; 342 if (xerr->error_code == BadWindow) { 343 WindowExistsFlag = GL_FALSE; 344 } 345 return 0; 346} 347 348static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 349{ 350 XWindowAttributes wa; 351 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 352 WindowExistsFlag = GL_TRUE; 353 old_handler = XSetErrorHandler(window_exists_err_handler); 354 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 355 XSetErrorHandler(old_handler); 356 return WindowExistsFlag; 357} 358#endif 359 360 361 362/**********************************************************************/ 363/***** Linked list of XMesaBuffers *****/ 364/**********************************************************************/ 365 366static XMesaBuffer XMesaBufferList = NULL; 367 368 369/* Allocate a new XMesaBuffer, add to linked list */ 370static XMesaBuffer alloc_xmesa_buffer(void) 371{ 372 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 373 if (b) { 374 b->Next = XMesaBufferList; 375 XMesaBufferList = b; 376 } 377 return b; 378} 379 380 381/* 382 * Find an XMesaBuffer by matching X display and colormap but NOT matching 383 * the notThis buffer. 384 */ 385static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 386 XMesaColormap cmap, 387 XMesaBuffer notThis) 388{ 389 XMesaBuffer b; 390 for (b=XMesaBufferList; b; b=b->Next) { 391 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 392 return b; 393 } 394 } 395 return NULL; 396} 397 398 399/* 400 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 401 * entries. 402 */ 403static void free_xmesa_buffer(int client, XMesaBuffer buffer) 404{ 405 XMesaBuffer prev = NULL, b; 406 (void) client; 407 for (b=XMesaBufferList; b; b=b->Next) { 408 if (b==buffer) { 409 /* unlink bufer from list */ 410 if (prev) 411 prev->Next = buffer->Next; 412 else 413 XMesaBufferList = buffer->Next; 414 /* Check to free X colors */ 415 if (buffer->num_alloced>0) { 416 /* If no other buffer uses this X colormap then free the colors. */ 417 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 418#ifdef XFree86Server 419 (void)FreeColors(buffer->cmap, client, 420 buffer->num_alloced, buffer->alloced_colors, 421 0); 422#else 423 XFreeColors(buffer->display, buffer->cmap, 424 buffer->alloced_colors, buffer->num_alloced, 0); 425#endif 426 } 427 } 428 429 _mesa_free_framebuffer_data(&buffer->mesa_buffer); 430 FREE(buffer); 431 432 return; 433 } 434 /* continue search */ 435 prev = b; 436 } 437 /* buffer not found in XMesaBufferList */ 438 _mesa_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 439} 440 441 442/* Copy X color table stuff from one XMesaBuffer to another. */ 443static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 444{ 445 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 446 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 447 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 448 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 449 dst->num_alloced = src->num_alloced; 450 MEMCPY(dst->alloced_colors, src->alloced_colors, 451 sizeof(src->alloced_colors)); 452} 453 454 455 456/**********************************************************************/ 457/***** Misc Private Functions *****/ 458/**********************************************************************/ 459 460 461/* 462 * Return number of bits set in n. 463 */ 464static int bitcount( unsigned long n ) 465{ 466 int bits; 467 for (bits=0; n>0; n=n>>1) { 468 if (n&1) { 469 bits++; 470 } 471 } 472 return bits; 473} 474 475 476 477/* 478 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 479 * Return: GL_TRUE if success, GL_FALSE if error 480 */ 481#ifndef XFree86Server 482static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 483{ 484#ifdef USE_XSHM 485 /* 486 * We have to do a _lot_ of error checking here to be sure we can 487 * really use the XSHM extension. It seems different servers trigger 488 * errors at different points if the extension won't work. Therefore 489 * we have to be very careful... 490 */ 491 GC gc; 492 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 493 494 b->backimage = XShmCreateImage( b->xm_visual->display, 495 b->xm_visual->visinfo->visual, 496 b->xm_visual->visinfo->depth, 497 ZPixmap, NULL, &b->shminfo, 498 b->width, b->height ); 499 if (b->backimage == NULL) { 500 error("alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 501 b->shm = 0; 502 return GL_FALSE; 503 } 504 505 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 506 * b->backimage->height, IPC_CREAT|0777 ); 507 if (b->shminfo.shmid < 0) { 508 if (getenv("MESA_DEBUG")) 509 perror("alloc_back_buffer"); 510 XDestroyImage( b->backimage ); 511 b->backimage = NULL; 512 error("alloc_back_buffer: Shared memory error (shmget), disabling."); 513 b->shm = 0; 514 return GL_FALSE; 515 } 516 517 b->shminfo.shmaddr = b->backimage->data 518 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 519 if (b->shminfo.shmaddr == (char *) -1) { 520 if (getenv("MESA_DEBUG")) 521 perror("alloc_back_buffer"); 522 XDestroyImage( b->backimage ); 523 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 524 b->backimage = NULL; 525 error("alloc_back_buffer: Shared memory error (shmat), disabling."); 526 b->shm = 0; 527 return GL_FALSE; 528 } 529 530 b->shminfo.readOnly = False; 531 mesaXErrorFlag = 0; 532 old_handler = XSetErrorHandler( mesaHandleXError ); 533 /* This may trigger the X protocol error we're ready to catch: */ 534 XShmAttach( b->xm_visual->display, &b->shminfo ); 535 XSync( b->xm_visual->display, False ); 536 537 if (mesaXErrorFlag) { 538 /* we are on a remote display, this error is normal, don't print it */ 539 XFlush( b->xm_visual->display ); 540 mesaXErrorFlag = 0; 541 XDestroyImage( b->backimage ); 542 shmdt( b->shminfo.shmaddr ); 543 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 544 b->backimage = NULL; 545 b->shm = 0; 546 (void) XSetErrorHandler( old_handler ); 547 return GL_FALSE; 548 } 549 550 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 551 552 /* Finally, try an XShmPutImage to be really sure the extension works */ 553 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 554 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 555 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 556 XSync( b->xm_visual->display, False ); 557 XFreeGC( b->xm_visual->display, gc ); 558 (void) XSetErrorHandler( old_handler ); 559 if (mesaXErrorFlag) { 560 XFlush( b->xm_visual->display ); 561 mesaXErrorFlag = 0; 562 XDestroyImage( b->backimage ); 563 shmdt( b->shminfo.shmaddr ); 564 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 565 b->backimage = NULL; 566 b->shm = 0; 567 return GL_FALSE; 568 } 569 570 if (b->backimage) { 571 int height = b->backimage->height; 572 /* Needed by PIXELADDR1 macro */ 573 b->ximage_width1 = b->backimage->bytes_per_line; 574 b->ximage_origin1 = (GLubyte *) b->backimage->data 575 + b->ximage_width1 * (height-1); 576 /* Needed by PIXELADDR2 macro */ 577 b->ximage_width2 = b->backimage->bytes_per_line / 2; 578 b->ximage_origin2 = (GLushort *) b->backimage->data 579 + b->ximage_width2 * (height-1); 580 /* Needed by PIXELADDR3 macro */ 581 b->ximage_width3 = b->backimage->bytes_per_line; 582 b->ximage_origin3 = (GLubyte *) b->backimage->data 583 + b->ximage_width3 * (height-1); 584 /* Needed by PIXELADDR4 macro */ 585 b->ximage_width4 = b->backimage->width; 586 b->ximage_origin4 = (GLuint *) b->backimage->data 587 + b->ximage_width4 * (height-1); 588 } 589 590 return GL_TRUE; 591#else 592 /* Can't compile XSHM support */ 593 return GL_FALSE; 594#endif 595} 596#endif 597 598 599 600/* 601 * Setup an off-screen pixmap or Ximage to use as the back buffer. 602 * Input: b - the X/Mesa buffer 603 */ 604void xmesa_alloc_back_buffer( XMesaBuffer b ) 605{ 606 if (b->db_state==BACK_XIMAGE) { 607 /* Deallocate the old backimage, if any */ 608 if (b->backimage) { 609#if defined(USE_XSHM) && !defined(XFree86Server) 610 if (b->shm) { 611 XShmDetach( b->xm_visual->display, &b->shminfo ); 612 XDestroyImage( b->backimage ); 613 shmdt( b->shminfo.shmaddr ); 614 } 615 else 616#endif 617 XMesaDestroyImage( b->backimage ); 618 b->backimage = NULL; 619 } 620 621 /* Allocate new back buffer */ 622#ifdef XFree86Server 623 { 624 /* Allocate a regular XImage for the back buffer. */ 625 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 626 b->width, b->height, NULL); 627#else 628 if (b->shm==0 629 || alloc_shm_back_buffer(b)==GL_FALSE 630 ) { 631 /* Allocate a regular XImage for the back buffer. */ 632 b->backimage = XCreateImage( b->xm_visual->display, 633 b->xm_visual->visinfo->visual, 634 GET_VISUAL_DEPTH(b->xm_visual), 635 ZPixmap, 0, /* format, offset */ 636 NULL, b->width, b->height, 637 8, 0 ); /* pad, bytes_per_line */ 638#endif 639 if (!b->backimage) { 640 error("alloc_back_buffer: XCreateImage failed."); 641 } 642 b->backimage->data = (char *) MALLOC( b->backimage->height 643 * b->backimage->bytes_per_line ); 644 if (!b->backimage->data) { 645 error("alloc_back_buffer: MALLOC failed."); 646 XMesaDestroyImage( b->backimage ); 647 b->backimage = NULL; 648 } 649 } 650 b->backpixmap = None; 651 } 652 else if (b->db_state==BACK_PIXMAP) { 653 XMesaPixmap old_pixmap = b->backpixmap; 654 /* Free the old back pixmap */ 655 if (b->backpixmap) { 656 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 657 } 658 /* Allocate new back pixmap */ 659 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 660 b->width, b->height, 661 GET_VISUAL_DEPTH(b->xm_visual) ); 662 b->backimage = NULL; 663 /* update other references to backpixmap */ 664 if (b->buffer==(XMesaDrawable)old_pixmap) { 665 b->buffer = (XMesaDrawable)b->backpixmap; 666 } 667 } 668} 669 670 671 672/* 673 * A replacement for XAllocColor. This function should never 674 * fail to allocate a color. When XAllocColor fails, we return 675 * the nearest matching color. If we have to allocate many colors 676 * this function isn't too efficient; the XQueryColors() could be 677 * done just once. 678 * Written by Michael Pichler, Brian Paul, Mark Kilgard 679 * Input: dpy - X display 680 * cmap - X colormap 681 * cmapSize - size of colormap 682 * In/Out: color - the XColor struct 683 * Output: exact - 1=exact color match, 0=closest match 684 * alloced - 1=XAlloc worked, 0=XAlloc failed 685 */ 686static void 687noFaultXAllocColor( int client, 688 XMesaDisplay *dpy, 689 XMesaColormap cmap, 690 int cmapSize, 691 XMesaColor *color, 692 int *exact, int *alloced ) 693{ 694#ifdef XFree86Server 695 Pixel *ppixIn; 696 xrgb *ctable; 697#else 698 /* we'll try to cache ctable for better remote display performance */ 699 static Display *prevDisplay = NULL; 700 static XMesaColormap prevCmap = 0; 701 static int prevCmapSize = 0; 702 static XMesaColor *ctable = NULL; 703#endif 704 XMesaColor subColor; 705 int i, bestmatch; 706 double mindist; /* 3*2^16^2 exceeds long int precision. */ 707 708 (void) client; 709 710 /* First try just using XAllocColor. */ 711#ifdef XFree86Server 712 if (AllocColor(cmap, 713 &color->red, &color->green, &color->blue, 714 &color->pixel, 715 client) == Success) { 716#else 717 if (XAllocColor(dpy, cmap, color)) { 718#endif 719 *exact = 1; 720 *alloced = 1; 721 return; 722 } 723 724 /* Alloc failed, search for closest match */ 725 726 /* Retrieve color table entries. */ 727 /* XXX alloca candidate. */ 728#ifdef XFree86Server 729 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 730 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 731 for (i = 0; i < cmapSize; i++) { 732 ppixIn[i] = i; 733 } 734 QueryColors(cmap, cmapSize, ppixIn, ctable); 735#else 736 if (prevDisplay != dpy || prevCmap != cmap 737 || prevCmapSize != cmapSize || !ctable) { 738 /* free previously cached color table */ 739 if (ctable) 740 FREE(ctable); 741 /* Get the color table from X */ 742 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 743 assert(ctable); 744 for (i = 0; i < cmapSize; i++) { 745 ctable[i].pixel = i; 746 } 747 XQueryColors(dpy, cmap, ctable, cmapSize); 748 prevDisplay = dpy; 749 prevCmap = cmap; 750 prevCmapSize = cmapSize; 751 } 752#endif 753 754 /* Find best match. */ 755 bestmatch = -1; 756 mindist = 0.0; 757 for (i = 0; i < cmapSize; i++) { 758 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 759 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 760 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 761 double dist = dr * dr + dg * dg + db * db; 762 if (bestmatch < 0 || dist < mindist) { 763 bestmatch = i; 764 mindist = dist; 765 } 766 } 767 768 /* Return result. */ 769 subColor.red = ctable[bestmatch].red; 770 subColor.green = ctable[bestmatch].green; 771 subColor.blue = ctable[bestmatch].blue; 772 /* Try to allocate the closest match color. This should only 773 * fail if the cell is read/write. Otherwise, we're incrementing 774 * the cell's reference count. 775 */ 776#ifdef XFree86Server 777 if (AllocColor(cmap, 778 &subColor.red, &subColor.green, &subColor.blue, 779 &subColor.pixel, 780 client) == Success) { 781#else 782 if (XAllocColor(dpy, cmap, &subColor)) { 783#endif 784 *alloced = 1; 785 } 786 else { 787 /* do this to work around a problem reported by Frank Ortega */ 788 subColor.pixel = (unsigned long) bestmatch; 789 subColor.red = ctable[bestmatch].red; 790 subColor.green = ctable[bestmatch].green; 791 subColor.blue = ctable[bestmatch].blue; 792 subColor.flags = DoRed | DoGreen | DoBlue; 793 *alloced = 0; 794 } 795#ifdef XFree86Server 796 FREE(ppixIn); 797 FREE(ctable); 798#else 799 /* don't free table, save it for next time */ 800#endif 801 802 *color = subColor; 803 *exact = 0; 804} 805 806 807 808 809/* 810 * Do setup for PF_GRAYSCALE pixel format. 811 * Note that buffer may be NULL. 812 */ 813static GLboolean setup_grayscale( int client, XMesaVisual v, 814 XMesaBuffer buffer, XMesaColormap cmap ) 815{ 816 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 817 return GL_FALSE; 818 } 819 820 if (buffer) { 821 XMesaBuffer prevBuffer; 822 823 if (!cmap) { 824 return GL_FALSE; 825 } 826 827 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 828 if (prevBuffer && 829 (buffer->xm_visual->mesa_visual.rgbMode == 830 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 831 /* Copy colormap stuff from previous XMesaBuffer which uses same 832 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 833 */ 834 copy_colortable_info(buffer, prevBuffer); 835 } 836 else { 837 /* Allocate 256 shades of gray */ 838 int gray; 839 int colorsfailed = 0; 840 for (gray=0;gray<256;gray++) { 841 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 842 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 843 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 844 int exact, alloced; 845 XMesaColor xcol; 846 xcol.red = (r << 8) | r; 847 xcol.green = (g << 8) | g; 848 xcol.blue = (b << 8) | b; 849 noFaultXAllocColor( client, v->display, 850 cmap, GET_COLORMAP_SIZE(v), 851 &xcol, &exact, &alloced ); 852 if (!exact) { 853 colorsfailed++; 854 } 855 if (alloced) { 856 assert(buffer->num_alloced<256); 857 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 858 buffer->num_alloced++; 859 } 860 861 /*OLD 862 assert(gray < 576); 863 buffer->color_table[gray*3+0] = xcol.pixel; 864 buffer->color_table[gray*3+1] = xcol.pixel; 865 buffer->color_table[gray*3+2] = xcol.pixel; 866 assert(xcol.pixel < 65536); 867 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 868 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 869 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 870 */ 871 buffer->color_table[gray] = xcol.pixel; 872 assert(xcol.pixel < 65536); 873 buffer->pixel_to_r[xcol.pixel] = gray; 874 buffer->pixel_to_g[xcol.pixel] = gray; 875 buffer->pixel_to_b[xcol.pixel] = gray; 876 } 877 878 if (colorsfailed && getenv("MESA_DEBUG")) { 879 fprintf( stderr, 880 "Note: %d out of 256 needed colors do not match exactly.\n", 881 colorsfailed ); 882 } 883 } 884 } 885 886 v->dithered_pf = PF_GRAYSCALE; 887 v->undithered_pf = PF_GRAYSCALE; 888 return GL_TRUE; 889} 890 891 892 893/* 894 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 895 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 896 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 897 * color. While this function was originally designed just for 8-bit 898 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 899 * Dithering code contributed by Bob Mercier. 900 */ 901static GLboolean setup_dithered_color( int client, XMesaVisual v, 902 XMesaBuffer buffer, XMesaColormap cmap ) 903{ 904 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 905 return GL_FALSE; 906 } 907 908 if (buffer) { 909 XMesaBuffer prevBuffer; 910 911 if (!cmap) { 912 return GL_FALSE; 913 } 914 915 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 916 if (prevBuffer && 917 (buffer->xm_visual->mesa_visual.rgbMode == 918 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 919 /* Copy colormap stuff from previous, matching XMesaBuffer. 920 * Do this to avoid time spent in noFaultXAllocColor. 921 */ 922 copy_colortable_info(buffer, prevBuffer); 923 } 924 else { 925 /* Allocate X colors and initialize color_table[], red_table[], etc */ 926 int r, g, b, i; 927 int colorsfailed = 0; 928 for (r = 0; r < _R; r++) { 929 for (g = 0; g < _G; g++) { 930 for (b = 0; b < _B; b++) { 931 XMesaColor xcol; 932 int exact, alloced; 933 xcol.red =gamma_adjust(v->RedGamma, r*65535/(_R-1),65535); 934 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(_G-1),65535); 935 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(_B-1),65535); 936 noFaultXAllocColor( client, v->display, 937 cmap, GET_COLORMAP_SIZE(v), 938 &xcol, &exact, &alloced ); 939 if (!exact) { 940 colorsfailed++; 941 } 942 if (alloced) { 943 assert(buffer->num_alloced<256); 944 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 945 buffer->num_alloced++; 946 } 947 i = _MIX( r, g, b ); 948 assert(i < 576); 949 buffer->color_table[i] = xcol.pixel; 950 assert(xcol.pixel < 65536); 951 buffer->pixel_to_r[xcol.pixel] = r * 255 / (_R-1); 952 buffer->pixel_to_g[xcol.pixel] = g * 255 / (_G-1); 953 buffer->pixel_to_b[xcol.pixel] = b * 255 / (_B-1); 954 } 955 } 956 } 957 958 if (colorsfailed && getenv("MESA_DEBUG")) { 959 fprintf( stderr, 960 "Note: %d out of %d needed colors do not match exactly.\n", 961 colorsfailed, _R*_G*_B ); 962 } 963 } 964 } 965 966 v->dithered_pf = PF_DITHER; 967 v->undithered_pf = PF_LOOKUP; 968 return GL_TRUE; 969} 970 971 972/* 973 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 974 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 975 * Special dithering tables have to be initialized. 976 */ 977static void setup_8bit_hpcr( XMesaVisual v ) 978{ 979 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 980 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 981 * on the root window AND the colormap obtainable by XGetRGBColormaps 982 * for that atom must be set on the window. (see also tkInitWindow) 983 * If that colormap is not set, the output will look stripy. 984 */ 985 986 /* Setup color tables with gamma correction */ 987 int i; 988 double g; 989 990 g = 1.0 / v->RedGamma; 991 for (i=0; i<256; i++) { 992 GLint red = IROUND_POS(255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g )); 993 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 994 } 995 996 g = 1.0 / v->GreenGamma; 997 for (i=0; i<256; i++) { 998 GLint green = IROUND_POS(255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g )); 999 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 1000 } 1001 1002 g = 1.0 / v->BlueGamma; 1003 for (i=0; i<256; i++) { 1004 GLint blue = IROUND_POS(255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g )); 1005 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 1006 } 1007 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 1008 v->dithered_pf = PF_HPCR; 1009 1010 /* which method should I use to clear */ 1011 /* GL_FALSE: keep the ordinary method */ 1012 /* GL_TRUE : clear with dither pattern */ 1013 v->hpcr_clear_flag = getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 1014 1015 if (v->hpcr_clear_flag) { 1016 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 1017 DefaultRootWindow(v->display), 1018 16, 2, 8); 1019#ifndef XFree86Server 1020 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1021 0, 0, 16, 2, AllPlanes, ZPixmap); 1022#endif 1023 } 1024} 1025 1026 1027/* 1028 * Setup RGB rendering for a window with a True/DirectColor visual. 1029 */ 1030static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1031 XMesaWindow window, XMesaColormap cmap ) 1032{ 1033 unsigned long rmask, gmask, bmask; 1034 (void) buffer; 1035 (void) window; 1036 (void) cmap; 1037 1038 /* Compute red multiplier (mask) and bit shift */ 1039 v->rshift = 0; 1040 rmask = GET_REDMASK(v); 1041 while ((rmask & 1)==0) { 1042 v->rshift++; 1043 rmask = rmask >> 1; 1044 } 1045 1046 /* Compute green multiplier (mask) and bit shift */ 1047 v->gshift = 0; 1048 gmask = GET_GREENMASK(v); 1049 while ((gmask & 1)==0) { 1050 v->gshift++; 1051 gmask = gmask >> 1; 1052 } 1053 1054 /* Compute blue multiplier (mask) and bit shift */ 1055 v->bshift = 0; 1056 bmask = GET_BLUEMASK(v); 1057 while ((bmask & 1)==0) { 1058 v->bshift++; 1059 bmask = bmask >> 1; 1060 } 1061 1062 /* 1063 * Compute component-to-pixel lookup tables and dithering kernel 1064 */ 1065 { 1066 static GLubyte kernel[16] = { 1067 0*16, 8*16, 2*16, 10*16, 1068 12*16, 4*16, 14*16, 6*16, 1069 3*16, 11*16, 1*16, 9*16, 1070 15*16, 7*16, 13*16, 5*16, 1071 }; 1072 GLint rBits = bitcount(rmask); 1073 GLint gBits = bitcount(gmask); 1074 GLint bBits = bitcount(bmask); 1075 GLint maxBits; 1076 GLuint i; 1077 1078 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1079 for (i=0; i<=rmask; i++) 1080 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1081 for (i=0; i<=gmask; i++) 1082 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1083 for (i=0; i<=bmask; i++) 1084 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1085 1086 /* convert RGB values from [0,255] to pixel components */ 1087 1088 for (i=0;i<256;i++) { 1089 GLint r = gamma_adjust(v->RedGamma, i, 255); 1090 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1091 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1092 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1093 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1094 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1095 } 1096 /* overflow protection */ 1097 for (i=256;i<512;i++) { 1098 v->RtoPixel[i] = v->RtoPixel[255]; 1099 v->GtoPixel[i] = v->GtoPixel[255]; 1100 v->BtoPixel[i] = v->BtoPixel[255]; 1101 } 1102 1103 /* setup dithering kernel */ 1104 maxBits = rBits; 1105 if (gBits > maxBits) maxBits = gBits; 1106 if (bBits > maxBits) maxBits = bBits; 1107 for (i=0;i<16;i++) { 1108 v->Kernel[i] = kernel[i] >> maxBits; 1109 } 1110 1111 v->undithered_pf = PF_TRUECOLOR; 1112 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_TRUEDITHER : PF_TRUECOLOR; 1113 } 1114 1115 /* 1116 * Now check for TrueColor visuals which we can optimize. 1117 */ 1118 if ( GET_REDMASK(v) ==0x0000ff 1119 && GET_GREENMASK(v)==0x00ff00 1120 && GET_BLUEMASK(v) ==0xff0000 1121 && CHECK_BYTE_ORDER(v) 1122 && v->BitsPerPixel==32 1123 && sizeof(GLuint)==4 1124 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1125 /* common 32 bpp config used on SGI, Sun */ 1126 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1127 } 1128 else if (GET_REDMASK(v) ==0xff0000 1129 && GET_GREENMASK(v)==0x00ff00 1130 && GET_BLUEMASK(v) ==0x0000ff 1131 && CHECK_BYTE_ORDER(v) 1132 && v->BitsPerPixel==32 1133 && sizeof(GLuint)==4 1134 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1135 /* common 32 bpp config used on Linux, HP, IBM */ 1136 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1137 } 1138 else if (GET_REDMASK(v) ==0xff0000 1139 && GET_GREENMASK(v)==0x00ff00 1140 && GET_BLUEMASK(v) ==0x0000ff 1141 && CHECK_BYTE_ORDER(v) 1142 && v->BitsPerPixel==24 1143 && sizeof(GLuint)==4 1144 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1145 /* common packed 24 bpp config used on Linux */ 1146 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1147 } 1148 else if (GET_REDMASK(v) ==0xf800 1149 && GET_GREENMASK(v)==0x07e0 1150 && GET_BLUEMASK(v) ==0x001f 1151 && CHECK_BYTE_ORDER(v) 1152 && v->BitsPerPixel==16 1153 && sizeof(GLushort)==2 1154 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1155 /* 5-6-5 color weight on common PC VGA boards */ 1156 v->undithered_pf = PF_5R6G5B; 1157 v->dithered_pf = PF_DITHER_5R6G5B; 1158 } 1159 else if (GET_REDMASK(v) ==0xe0 1160 && GET_GREENMASK(v)==0x1c 1161 && GET_BLUEMASK(v) ==0x03 1162 && CHECK_FOR_HPCR(v)) { 1163 setup_8bit_hpcr( v ); 1164 } 1165} 1166 1167 1168 1169/* 1170 * Setup RGB rendering for a window with a monochrome visual. 1171 */ 1172static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1173{ 1174 (void) b; 1175 v->dithered_pf = v->undithered_pf = PF_1BIT; 1176 /* if black=1 then we must flip pixel values */ 1177 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1178} 1179 1180 1181 1182/* 1183 * When a context is "made current" for the first time, we can finally 1184 * finish initializing the context's visual and buffer information. 1185 * Input: v - the XMesaVisual to initialize 1186 * b - the XMesaBuffer to initialize (may be NULL) 1187 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1188 * window - the window/pixmap we're rendering into 1189 * cmap - the colormap associated with the window/pixmap 1190 * Return: GL_TRUE=success, GL_FALSE=failure 1191 */ 1192static GLboolean initialize_visual_and_buffer( int client, 1193 XMesaVisual v, 1194 XMesaBuffer b, 1195 GLboolean rgb_flag, 1196 XMesaDrawable window, 1197 XMesaColormap cmap 1198 ) 1199{ 1200#ifndef XFree86Server 1201 XGCValues gcvalues; 1202#endif 1203 1204 if (b) { 1205 assert(b->xm_visual == v); 1206 } 1207 1208 /* Save true bits/pixel */ 1209 v->BitsPerPixel = GET_BITS_PER_PIXEL(v); 1210 assert(v->BitsPerPixel > 0); 1211 1212 1213 if (rgb_flag==GL_FALSE) { 1214 /* COLOR-INDEXED WINDOW: 1215 * Even if the visual is TrueColor or DirectColor we treat it as 1216 * being color indexed. This is weird but might be useful to someone. 1217 */ 1218 v->dithered_pf = v->undithered_pf = PF_INDEX; 1219 v->index_bits = GET_VISUAL_DEPTH(v); 1220 } 1221 else { 1222 /* RGB WINDOW: 1223 * We support RGB rendering into almost any kind of visual. 1224 */ 1225 int xclass; 1226 xclass = GET_VISUAL_CLASS(v); 1227 if (xclass==TrueColor || xclass==DirectColor) { 1228 setup_truecolor( v, b, (XMesaWindow)window, cmap ); 1229 } 1230 else if (xclass==StaticGray && GET_VISUAL_DEPTH(v)==1) { 1231 setup_monochrome( v, b ); 1232 } 1233 else if (xclass==GrayScale || xclass==StaticGray) { 1234 if (!setup_grayscale( client, v, b, cmap )) { 1235 return GL_FALSE; 1236 } 1237 } 1238 else if ((xclass==PseudoColor || xclass==StaticColor) 1239 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1240 if (!setup_dithered_color( client, v, b, cmap )) { 1241 return GL_FALSE; 1242 } 1243 } 1244 else { 1245 error("XMesa: RGB mode rendering not supported in given visual."); 1246 return GL_FALSE; 1247 } 1248 v->index_bits = 0; 1249 1250 if (getenv("MESA_NO_DITHER")) { 1251 v->dithered_pf = v->undithered_pf; 1252 } 1253 } 1254 1255 1256 /* 1257 * If MESA_INFO env var is set print out some debugging info 1258 * which can help Brian figure out what's going on when a user 1259 * reports bugs. 1260 */ 1261 if (getenv("MESA_INFO")) { 1262 fprintf(stderr, "X/Mesa visual = %p\n", v); 1263 fprintf(stderr, "X/Mesa dithered pf = %u\n", v->dithered_pf); 1264 fprintf(stderr, "X/Mesa undithered pf = %u\n", v->undithered_pf); 1265 fprintf(stderr, "X/Mesa level = %d\n", v->level); 1266 fprintf(stderr, "X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1267 fprintf(stderr, "X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1268 } 1269 1270 if (b && window) { 1271 /* Do window-specific initializations */ 1272 1273 /* Window dimensions */ 1274 unsigned int w, h; 1275 get_drawable_size( v->display, window, &w, &h ); 1276 b->width = w; 1277 b->height = h; 1278 1279 b->frontbuffer = window; 1280 1281 /* Setup for single/double buffering */ 1282 if (v->mesa_visual.doubleBufferMode) { 1283 /* Double buffered */ 1284#ifndef XFree86Server 1285 b->shm = check_for_xshm( v->display ); 1286#endif 1287 xmesa_alloc_back_buffer( b ); 1288 if (b->db_state==BACK_PIXMAP) { 1289 b->buffer = (XMesaDrawable)b->backpixmap; 1290 } 1291 else { 1292 b->buffer = XIMAGE; 1293 } 1294 } 1295 else { 1296 /* Single Buffered */ 1297 b->buffer = b->frontbuffer; 1298 } 1299 1300 /* X11 graphics contexts */ 1301#ifdef XFree86Server 1302 b->gc = CreateScratchGC(v->display, window->depth); 1303#else 1304 b->gc = XCreateGC( v->display, window, 0, NULL ); 1305#endif 1306 XMesaSetFunction( v->display, b->gc, GXcopy ); 1307 1308 /* 1309 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1310 * Patch contributed by Michael Pichler May 15, 1995. 1311 */ 1312#ifdef XFree86Server 1313 b->cleargc = CreateScratchGC(v->display, window->depth); 1314 { 1315 CARD32 v[1]; 1316 v[0] = FALSE; 1317 dixChangeGC(NullClient, b->cleargc, GCGraphicsExposures, v, NULL); 1318 } 1319#else 1320 gcvalues.graphics_exposures = False; 1321 b->cleargc = XCreateGC( v->display, window, 1322 GCGraphicsExposures, &gcvalues); 1323#endif 1324 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1325 /* 1326 * Set fill style and tile pixmap once for all for HPCR stuff 1327 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1328 * Initialize whole stuff 1329 * Patch contributed by Jacques Leroy March 8, 1998. 1330 */ 1331 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1332 int i; 1333 for (i=0; i<16; i++) 1334 { 1335 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1336 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1337 } 1338 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1339 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1340 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1341 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1342 } 1343 1344 /* Initialize the row buffer XImage for use in write_color_span() */ 1345#ifdef XFree86Server 1346 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1347 (char *)MALLOC(MAX_WIDTH*4)); 1348#else 1349 b->rowimage = XCreateImage( v->display, 1350 v->visinfo->visual, 1351 v->visinfo->depth, 1352 ZPixmap, 0, /*format, offset*/ 1353 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1354 MAX_WIDTH, 1, /*width, height*/ 1355 32, /*bitmap_pad*/ 1356 0 /*bytes_per_line*/ ); 1357#endif 1358 } 1359 1360 return GL_TRUE; 1361} 1362 1363 1364 1365/* 1366 * Convert an RGBA color to a pixel value. 1367 */ 1368unsigned long 1369xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1370 GLuint pixelFormat) 1371{ 1372 switch (pixelFormat) { 1373 case PF_INDEX: 1374 return 0; 1375 case PF_TRUECOLOR: 1376 { 1377 unsigned long p; 1378 PACK_TRUECOLOR( p, r, g, b ); 1379 return p; 1380 } 1381 case PF_8A8B8G8R: 1382 return PACK_8A8B8G8R( r, g, b, a ); 1383 case PF_8R8G8B: 1384 /* fall through */ 1385 case PF_8R8G8B24: 1386 return PACK_8R8G8B( r, g, b ); 1387 case PF_5R6G5B: 1388 return PACK_5R6G5B( r, g, b ); 1389 case PF_DITHER: 1390 { 1391 DITHER_SETUP; 1392 return DITHER( 1, 0, r, g, b ); 1393 } 1394 case PF_1BIT: 1395 /* 382 = (3*255)/2 */ 1396 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1397 case PF_HPCR: 1398 return DITHER_HPCR(1, 1, r, g, b); 1399 case PF_LOOKUP: 1400 { 1401 LOOKUP_SETUP; 1402 return LOOKUP( r, g, b ); 1403 } 1404 case PF_GRAYSCALE: 1405 return GRAY_RGB( r, g, b ); 1406 case PF_TRUEDITHER: 1407 /* fall through */ 1408 case PF_DITHER_5R6G5B: 1409 { 1410 unsigned long p; 1411 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1412 return p; 1413 } 1414 default: 1415 _mesa_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1416 } 1417 return 0; 1418} 1419 1420 1421/**********************************************************************/ 1422/***** Public Functions *****/ 1423/**********************************************************************/ 1424 1425 1426/* 1427 * Create a new X/Mesa visual. 1428 * Input: display - X11 display 1429 * visinfo - an XVisualInfo pointer 1430 * rgb_flag - GL_TRUE = RGB mode, 1431 * GL_FALSE = color index mode 1432 * alpha_flag - alpha buffer requested? 1433 * db_flag - GL_TRUE = double-buffered, 1434 * GL_FALSE = single buffered 1435 * stereo_flag - stereo visual? 1436 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1437 * GL_FALSE = use an off-screen pixmap for back buffer 1438 * depth_size - requested bits/depth values, or zero 1439 * stencil_size - requested bits/stencil values, or zero 1440 * accum_red_size - requested bits/red accum values, or zero 1441 * accum_green_size - requested bits/green accum values, or zero 1442 * accum_blue_size - requested bits/blue accum values, or zero 1443 * accum_alpha_size - requested bits/alpha accum values, or zero 1444 * num_samples - number of samples/pixel if multisampling, or zero 1445 * level - visual level, usually 0 1446 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT 1447 * Return; a new XMesaVisual or 0 if error. 1448 */ 1449XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1450 XMesaVisualInfo visinfo, 1451 GLboolean rgb_flag, 1452 GLboolean alpha_flag, 1453 GLboolean db_flag, 1454 GLboolean stereo_flag, 1455 GLboolean ximage_flag, 1456 GLint depth_size, 1457 GLint stencil_size, 1458 GLint accum_red_size, 1459 GLint accum_green_size, 1460 GLint accum_blue_size, 1461 GLint accum_alpha_size, 1462 GLint num_samples, 1463 GLint level, 1464 GLint visualCaveat ) 1465{ 1466 char *gamma; 1467 XMesaVisual v; 1468 GLint red_bits, green_bits, blue_bits, alpha_bits; 1469 1470 /* For debugging only */ 1471 if (getenv("MESA_XSYNC")) { 1472 /* This makes debugging X easier. 1473 * In your debugger, set a breakpoint on _XError to stop when an 1474 * X protocol error is generated. 1475 */ 1476#ifdef XFree86Server 1477 /* NOT_NEEDED */ 1478#else 1479 XSynchronize( display, 1 ); 1480#endif 1481 } 1482 1483 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1484 if (!v) { 1485 return NULL; 1486 } 1487 1488 /* 1489 * In the X server, NULL is passed in for the display. It will have 1490 * to be set before using this visual. See XMesaSetVisualDisplay() 1491 * below. 1492 */ 1493 v->display = display; 1494 1495 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1496 * the struct but we may need some of the information contained in it 1497 * at a later time. 1498 */ 1499#ifdef XFree86Server 1500 v->visinfo = visinfo; 1501#else 1502 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1503 if(!v->visinfo) { 1504 FREE(v); 1505 return NULL; 1506 } 1507 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1508 1509 /* Save a copy of the pointer now so we can find this visual again 1510 * if we need to search for it in find_glx_visual(). 1511 */ 1512 v->vishandle = visinfo; 1513#endif 1514 1515#ifdef XFree86Server 1516 /* Initialize the depth of the screen */ 1517 { 1518 PixmapFormatRec *format; 1519 1520 for (format = screenInfo.formats; 1521 format->depth != display->rootDepth; 1522 format++) 1523 ; 1524 v->screen_depth = format->bitsPerPixel; 1525 } 1526#endif 1527 1528 /* check for MESA_GAMMA environment variable */ 1529 gamma = getenv("MESA_GAMMA"); 1530 if (gamma) { 1531 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1532 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1533 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1534 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1535 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1536 } 1537 else { 1538 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1539 } 1540 1541 v->ximage_flag = ximage_flag; 1542 v->level = level; 1543 v->VisualCaveat = visualCaveat; 1544 1545 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1546 1547 { 1548 int xclass; 1549 xclass = GET_VISUAL_CLASS(v); 1550 if (xclass==TrueColor || xclass==DirectColor) { 1551 red_bits = bitcount(GET_REDMASK(v)); 1552 green_bits = bitcount(GET_GREENMASK(v)); 1553 blue_bits = bitcount(GET_BLUEMASK(v)); 1554 alpha_bits = 0; 1555 } 1556 else { 1557 /* this is an approximation */ 1558 int depth; 1559 depth = GET_VISUAL_DEPTH(v); 1560 red_bits = depth / 3; 1561 depth -= red_bits; 1562 green_bits = depth / 2; 1563 depth -= green_bits; 1564 blue_bits = depth; 1565 alpha_bits = 0; 1566 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1567 } 1568 } 1569 1570 if (alpha_flag && alpha_bits == 0) 1571 alpha_bits = 8; 1572 1573 _mesa_initialize_visual( &v->mesa_visual, 1574 rgb_flag, db_flag, stereo_flag, 1575 red_bits, green_bits, 1576 blue_bits, alpha_bits, 1577 v->index_bits, 1578 depth_size, 1579 stencil_size, 1580 accum_red_size, accum_green_size, 1581 accum_blue_size, accum_alpha_size, 1582 0 ); 1583 return v; 1584} 1585 1586 1587void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1588{ 1589 v->display = dpy; 1590} 1591 1592 1593void XMesaDestroyVisual( XMesaVisual v ) 1594{ 1595#ifndef XFree86Server 1596 FREE(v->visinfo); 1597#endif 1598 FREE(v); 1599} 1600 1601 1602 1603/* 1604 * Create a new XMesaContext. 1605 * Input: v - XMesaVisual 1606 * share_list - another XMesaContext with which to share display 1607 * lists or NULL if no sharing is wanted. 1608 * Return: an XMesaContext or NULL if error. 1609 */ 1610XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1611{ 1612 XMesaContext c; 1613 GLcontext *ctx; 1614 GLboolean direct = GL_TRUE; /* XXXX */ 1615 /* NOT_DONE: should this be GL_FALSE??? */ 1616 static GLboolean firstTime = GL_TRUE; 1617 1618 if (firstTime) { 1619 _glthread_INIT_MUTEX(_xmesa_lock); 1620 firstTime = GL_FALSE; 1621 } 1622 1623 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1624 if (!c) { 1625 return NULL; 1626 } 1627 1628 ctx = c->gl_ctx = _mesa_create_context( &v->mesa_visual, 1629 share_list ? share_list->gl_ctx : (GLcontext *) NULL, 1630 (void *) c, direct ); 1631 if (!c->gl_ctx) { 1632 FREE(c); 1633 return NULL; 1634 } 1635 1636 _mesa_enable_sw_extensions(ctx); 1637 1638 if (CHECK_BYTE_ORDER(v)) { 1639 c->swapbytes = GL_FALSE; 1640 } 1641 else { 1642 c->swapbytes = GL_TRUE; 1643 } 1644 1645 c->xm_visual = v; 1646 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1647 c->display = v->display; 1648 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1649 1650 ctx->Driver.UpdateState = xmesa_update_state; 1651 1652 /* Initialize the software rasterizer and helper modules. 1653 */ 1654 _swrast_CreateContext( ctx ); 1655 _ac_CreateContext( ctx ); 1656 _tnl_CreateContext( ctx ); 1657 _swsetup_CreateContext( ctx ); 1658 1659 xmesa_register_swrast_functions( ctx ); 1660 1661 /* Set up some constant pointers: 1662 */ 1663 xmesa_init_pointers( ctx ); 1664 1665 1666 /* Run the config file 1667 */ 1668 _mesa_read_config_file( ctx ); 1669 1670 1671 return c; 1672} 1673 1674 1675 1676 1677void XMesaDestroyContext( XMesaContext c ) 1678{ 1679#ifdef FX 1680 if (c->xm_buffer && c->xm_buffer->FXctx) 1681 fxMesaDestroyContext(c->xm_buffer->FXctx); 1682#endif 1683 if (c->gl_ctx) { 1684 _swsetup_DestroyContext( c->gl_ctx ); 1685 _swrast_DestroyContext( c->gl_ctx ); 1686 _tnl_DestroyContext( c->gl_ctx ); 1687 _ac_DestroyContext( c->gl_ctx ); 1688 _mesa_destroy_context( c->gl_ctx ); 1689 } 1690 1691 /* 1692 * XXX This code should really go away because the ancilliary data 1693 * associated with a window/pixmap should not go away just because 1694 * a context is destroyed. 1695 */ 1696#if 0 1697 /* Destroy any buffers which are using this context. If we don't 1698 * we may have dangling references. Hmm, maybe we should just 1699 * set the buffer's context pointer to NULL instead of deleting it? 1700 * Let's see if we get any bug reports... 1701 * This contributed by Doug Rabson <dfr@calcaphon.com> 1702 */ 1703 { 1704 XMesaBuffer b, next; 1705 for (b = XMesaBufferList; b; b = next) { 1706 next = b->Next; 1707 if (!b->pixmap_flag) { 1708#ifndef XFree86Server 1709 XSync(b->display, False); 1710#endif 1711 if (b->xm_context == c) { 1712 /* found a context created for this context */ 1713 XMesaDestroyBuffer( b ); 1714 } 1715 } 1716 } 1717 } 1718#endif 1719 1720 FREE( c ); 1721} 1722 1723 1724 1725/* 1726 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1727 * Create a new XMesaBuffer from an X window. 1728 * Input: v - the XMesaVisual 1729 * w - the window 1730 * c - the context 1731 * Return: new XMesaBuffer or NULL if error 1732 */ 1733XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1734 XMesaContext c ) 1735{ 1736#ifndef XFree86Server 1737 XWindowAttributes attr; 1738#endif 1739#ifdef FX 1740 char *fxEnvVar; 1741#endif 1742 int client = 0; 1743 1744 XMesaBuffer b = alloc_xmesa_buffer(); 1745 if (!b) { 1746 return NULL; 1747 } 1748 1749 (void) c; 1750 1751#ifdef XFree86Server 1752 client = CLIENT_ID(((XMesaDrawable)w)->id); 1753#endif 1754 1755 assert(v); 1756 1757#ifdef XFree86Server 1758 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1759#else 1760 XGetWindowAttributes( v->display, w, &attr ); 1761 1762 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1763#endif 1764 if (getenv("MESA_DEBUG")) { 1765 fprintf(stderr, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1766 } 1767 return NULL; 1768 } 1769 1770 b->xm_context = NULL; /* Associate no context with this buffer */ 1771 1772 b->xm_visual = v; 1773 b->pixmap_flag = GL_FALSE; 1774 b->display = v->display; 1775#ifdef XFree86Server 1776 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1777#else 1778 if (attr.colormap) { 1779 b->cmap = attr.colormap; 1780 } 1781 else { 1782 if (getenv("MESA_DEBUG")) { 1783 fprintf(stderr, "Window %u has no colormap!\n", (unsigned int) w); 1784 } 1785 /* this is weird, a window w/out a colormap!? */ 1786 /* OK, let's just allocate a new one and hope for the best */ 1787 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1788 } 1789#endif 1790 1791 /* determine back buffer implementation */ 1792 if (v->mesa_visual.doubleBufferMode) { 1793 if (v->ximage_flag) { 1794 b->db_state = BACK_XIMAGE; 1795 } 1796 else { 1797 b->db_state = BACK_PIXMAP; 1798 } 1799 } 1800 else { 1801 b->db_state = 0; 1802 } 1803 1804 _mesa_initialize_framebuffer(&b->mesa_buffer, 1805 &v->mesa_visual, 1806 v->mesa_visual.depthBits > 0, 1807 v->mesa_visual.stencilBits > 0, 1808 v->mesa_visual.accumRedBits > 0, 1809 v->mesa_visual.alphaBits > 0 ); 1810 1811 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1812 (XMesaDrawable)w, b->cmap )) { 1813 free_xmesa_buffer(client, b); 1814 return NULL; 1815 } 1816 1817#ifdef FX 1818 fxEnvVar = getenv("MESA_GLX_FX"); 1819 if (fxEnvVar) { 1820 if (fxEnvVar[0]!='d') { 1821 int attribs[100]; 1822 int numAttribs = 0; 1823 int hw; 1824 if (v->mesa_visual.depthBits > 0) { 1825 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1826 attribs[numAttribs++] = 1; 1827 } 1828 if (v->mesa_visual.doubleBufferMode) { 1829 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1830 } 1831 if (v->mesa_visual.accumRedBits > 0) { 1832 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1833 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1834 } 1835 if (v->mesa_visual.stencilBits > 0) { 1836 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1837 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1838 } 1839 if (v->mesa_visual.alphaBits > 0) { 1840 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1841 attribs[numAttribs++] = 1; 1842 } 1843 if (c->gl_ctx) { 1844#define FXMESA_SHARE_CONTEXT 990099 /* keep in sync with fxapi.c! */ 1845 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1846 attribs[numAttribs++] = (int) c->gl_ctx; 1847 } 1848 attribs[numAttribs++] = FXMESA_NONE; 1849 1850 if ((hw = fxQueryHardware())==GR_SSTTYPE_VOODOO) { 1851 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1852 if ((v->undithered_pf!=PF_INDEX) && (b->backimage)) { 1853 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1854 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1855 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1856 else 1857 b->FXwindowHack = GL_FALSE; 1858 } 1859 } 1860 else { 1861 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1862 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1863 GR_REFRESH_75Hz, attribs); 1864 else 1865 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1866 b->FXisHackUsable = GL_FALSE; 1867 b->FXwindowHack = GL_FALSE; 1868 } 1869 /* 1870 fprintf(stderr, 1871 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1872 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1873 */ 1874 } 1875 } 1876 else { 1877 fprintf(stderr,"WARNING: This Mesa Library includes the Glide driver but\n"); 1878 fprintf(stderr," you have not defined the MESA_GLX_FX env. var.\n"); 1879 fprintf(stderr," (check the README.3DFX file for more information).\n\n"); 1880 fprintf(stderr," you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1881 } 1882#endif 1883 1884 return b; 1885} 1886 1887 1888XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1889{ 1890 return XMesaCreateWindowBuffer2( v, w, NULL ); 1891} 1892 1893 1894/* 1895 * Create a new XMesaBuffer from an X pixmap. 1896 * Input: v - the XMesaVisual 1897 * p - the pixmap 1898 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor 1899 * visual for the pixmap 1900 * Return: new XMesaBuffer or NULL if error 1901 */ 1902XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1903 XMesaPixmap p, XMesaColormap cmap ) 1904{ 1905 int client = 0; 1906 XMesaBuffer b = alloc_xmesa_buffer(); 1907 if (!b) { 1908 return NULL; 1909 } 1910 1911 1912#ifdef XFree86Server 1913 client = CLIENT_ID(((XMesaDrawable)p)->id); 1914#endif 1915 1916 assert(v); 1917 1918 b->xm_context = NULL; /* Associate no context with this buffer */ 1919 1920 b->xm_visual = v; 1921 b->pixmap_flag = GL_TRUE; 1922 b->display = v->display; 1923 b->cmap = cmap; 1924 1925 /* determine back buffer implementation */ 1926 if (v->mesa_visual.doubleBufferMode) { 1927 if (v->ximage_flag) { 1928 b->db_state = BACK_XIMAGE; 1929 } 1930 else { 1931 b->db_state = BACK_PIXMAP; 1932 } 1933 } 1934 else { 1935 b->db_state = 0; 1936 } 1937 1938 _mesa_initialize_framebuffer(&b->mesa_buffer, 1939 &v->mesa_visual, 1940 v->mesa_visual.depthBits > 0, 1941 v->mesa_visual.stencilBits > 0, 1942 v->mesa_visual.accumRedBits + 1943 v->mesa_visual.accumGreenBits + 1944 v->mesa_visual.accumBlueBits > 0, 1945 v->mesa_visual.alphaBits > 0 ); 1946 1947 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1948 (XMesaDrawable)p, cmap)) { 1949 free_xmesa_buffer(client, b); 1950 return NULL; 1951 } 1952 1953 return b; 1954} 1955 1956 1957 1958/* 1959 * Deallocate an XMesaBuffer structure and all related info. 1960 */ 1961void XMesaDestroyBuffer( XMesaBuffer b ) 1962{ 1963 int client = 0; 1964 1965#ifdef XFree86Server 1966 if (b->frontbuffer) 1967 client = CLIENT_ID(b->frontbuffer->id); 1968#endif 1969 1970 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1971 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1972 1973 if (b->backimage) { 1974#if defined(USE_XSHM) && !defined(XFree86Server) 1975 if (b->shm) { 1976 XShmDetach( b->xm_visual->display, &b->shminfo ); 1977 XDestroyImage( b->backimage ); 1978 shmdt( b->shminfo.shmaddr ); 1979 } 1980 else 1981#endif 1982 XMesaDestroyImage( b->backimage ); 1983 } 1984 if (b->backpixmap) { 1985 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 1986 if (b->xm_visual->hpcr_clear_flag) { 1987 XMesaFreePixmap( b->xm_visual->display, 1988 b->xm_visual->hpcr_clear_pixmap ); 1989 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 1990 } 1991 } 1992 if (b->rowimage) { 1993 FREE( b->rowimage->data ); 1994 b->rowimage->data = NULL; 1995 XMesaDestroyImage( b->rowimage ); 1996 } 1997 1998 if (b->xm_context) 1999 b->xm_context->xm_buffer = NULL; 2000 2001 free_xmesa_buffer(client, b); 2002} 2003 2004 2005 2006/* 2007 * Bind buffer b to context c and make c the current rendering context. 2008 */ 2009GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2010{ 2011 return XMesaMakeCurrent2( c, b, b ); 2012} 2013 2014 2015/* 2016 * Bind buffer b to context c and make c the current rendering context. 2017 */ 2018GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2019 XMesaBuffer readBuffer ) 2020{ 2021 if (c) { 2022 if (!drawBuffer || !readBuffer) 2023 return GL_FALSE; /* must specify buffers! */ 2024 2025#ifdef FX 2026 if (drawBuffer->FXctx) { 2027 fxMesaMakeCurrent(drawBuffer->FXctx); 2028 2029 /* Disassociate old buffer from this context */ 2030 if (c->xm_buffer) 2031 c->xm_buffer->xm_context = NULL; 2032 2033 /* Associate the context with this buffer */ 2034 drawBuffer->xm_context = c; 2035 2036 c->xm_buffer = drawBuffer; 2037 c->xm_read_buffer = readBuffer; 2038 c->use_read_buffer = (drawBuffer != readBuffer); 2039 2040 return GL_TRUE; 2041 } 2042#endif 2043 if (c->gl_ctx == _mesa_get_current_context() 2044 && c->xm_buffer == drawBuffer 2045 && c->xm_read_buffer == readBuffer 2046 && c->xm_buffer->wasCurrent) { 2047 /* same context and buffer, do nothing */ 2048 return GL_TRUE; 2049 } 2050 2051 /* Disassociate old buffer with this context */ 2052 if (c->xm_buffer) 2053 c->xm_buffer->xm_context = NULL; 2054 drawBuffer->xm_context = c; /* Associate the context with this buffer */ 2055 2056 c->xm_buffer = drawBuffer; 2057 c->xm_read_buffer = readBuffer; 2058 c->use_read_buffer = (drawBuffer != readBuffer); 2059 2060 _mesa_make_current2(c->gl_ctx, 2061 &drawBuffer->mesa_buffer, 2062 &readBuffer->mesa_buffer); 2063 2064 if (c->gl_ctx->Viewport.Width == 0) { 2065 /* initialize viewport to window size */ 2066 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2067 c->gl_ctx->Scissor.Width = drawBuffer->width; 2068 c->gl_ctx->Scissor.Height = drawBuffer->height; 2069 } 2070 2071 if (c->xm_visual->mesa_visual.rgbMode) { 2072 /* 2073 * Must recompute and set these pixel values because colormap 2074 * can be different for different windows. 2075 */ 2076 c->clearpixel = xmesa_color_to_pixel( c, 2077 c->clearcolor[0], 2078 c->clearcolor[1], 2079 c->clearcolor[2], 2080 c->clearcolor[3], 2081 c->xm_visual->undithered_pf); 2082 XMesaSetForeground(c->display, c->xm_buffer->cleargc, c->clearpixel); 2083 } 2084 2085 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2086 c->xm_buffer->wasCurrent = GL_TRUE; 2087 } 2088 else { 2089 /* Detach */ 2090 _mesa_make_current2( NULL, NULL, NULL ); 2091 } 2092 return GL_TRUE; 2093} 2094 2095 2096/* 2097 * Unbind the context c from its buffer. 2098 */ 2099GLboolean XMesaUnbindContext( XMesaContext c ) 2100{ 2101 /* A no-op for XFree86 integration purposes */ 2102 return GL_TRUE; 2103} 2104 2105 2106XMesaContext XMesaGetCurrentContext( void ) 2107{ 2108 GET_CURRENT_CONTEXT(ctx); 2109 if (ctx) { 2110 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2111 return xmesa; 2112 } 2113 else { 2114 return 0; 2115 } 2116} 2117 2118 2119XMesaBuffer XMesaGetCurrentBuffer( void ) 2120{ 2121 GET_CURRENT_CONTEXT(ctx); 2122 if (ctx) { 2123 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2124 return xmesa->xm_buffer; 2125 } 2126 else { 2127 return 0; 2128 } 2129} 2130 2131 2132/* New in Mesa 3.1 */ 2133XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2134{ 2135 GET_CURRENT_CONTEXT(ctx); 2136 if (ctx) { 2137 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2138 return xmesa->xm_buffer; 2139 } 2140 else { 2141 return 0; 2142 } 2143} 2144 2145 2146GLboolean XMesaForceCurrent(XMesaContext c) 2147{ 2148 if (c) { 2149 if (c->gl_ctx != _mesa_get_current_context()) { 2150 _mesa_make_current(c->gl_ctx, &c->xm_buffer->mesa_buffer); 2151 } 2152 } 2153 else { 2154 _mesa_make_current(NULL, NULL); 2155 } 2156 return GL_TRUE; 2157} 2158 2159 2160GLboolean XMesaLoseCurrent(XMesaContext c) 2161{ 2162 (void) c; 2163 _mesa_make_current(NULL, NULL); 2164 return GL_TRUE; 2165} 2166 2167 2168/* 2169 * Switch 3Dfx support hack between window and full-screen mode. 2170 */ 2171GLboolean XMesaSetFXmode( GLint mode ) 2172{ 2173#ifdef FX 2174 const char *fx = getenv("MESA_GLX_FX"); 2175 if (fx && fx[0] != 'd') { 2176 GET_CURRENT_CONTEXT(ctx); 2177 GrHwConfiguration hw; 2178 if (!FX_grSstQueryHardware(&hw)) { 2179 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2180 return GL_FALSE; 2181 } 2182 if (hw.num_sst < 1) { 2183 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2184 return GL_FALSE; 2185 } 2186 if (ctx) { 2187 XMesaContext xmesa = (XMesaContext) ctx->DriverCtx; 2188 if (mode == XMESA_FX_WINDOW) { 2189 if (xmesa->xm_buffer->FXisHackUsable) { 2190 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2191 xmesa->xm_buffer->FXwindowHack = GL_TRUE; 2192 return GL_TRUE; 2193 } 2194 } 2195 else if (mode == XMESA_FX_FULLSCREEN) { 2196 FX_grSstControl(GR_CONTROL_ACTIVATE); 2197 xmesa->xm_buffer->FXwindowHack = GL_FALSE; 2198 return GL_TRUE; 2199 } 2200 else { 2201 /* Error: Bad mode value */ 2202 } 2203 } 2204 } 2205 /*fprintf(stderr, "fallthrough\n");*/ 2206#else 2207 (void) mode; 2208#endif 2209 return GL_FALSE; 2210} 2211 2212 2213 2214#ifdef FX 2215/* 2216 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2217 */ 2218static void FXgetImage( XMesaBuffer b ) 2219{ 2220 static unsigned short pixbuf[MAX_WIDTH]; 2221 GLuint x, y; 2222 int xpos, ypos; 2223 XMesaWindow root; 2224 unsigned int bw, depth, width, height; 2225 XMesaContext xmesa = (XMesaContext) b->xm_context->gl_ctx->DriverCtx; 2226 2227 assert(xmesa->xm_buffer->FXctx); 2228 2229#ifdef XFree86Server 2230 x = b->frontbuffer->x; 2231 y = b->frontbuffer->y; 2232 width = b->frontbuffer->width; 2233 height = b->frontbuffer->height; 2234 depth = b->frontbuffer->depth; 2235#else 2236 XGetGeometry( xmesa->xm_visual->display, b->frontbuffer, 2237 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2238#endif 2239 if (b->width != width || b->height != height) { 2240 b->width = MIN2((int)width, xmesa->xm_buffer->FXctx->width); 2241 b->height = MIN2((int)height, xmesa->xm_buffer->FXctx->height); 2242 if (b->width & 1) 2243 b->width--; /* prevent odd width */ 2244 xmesa_alloc_back_buffer( b ); 2245 } 2246 2247 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); 2248 if (xmesa->xm_visual->undithered_pf==PF_5R6G5B) { 2249 /* Special case: 16bpp RGB */ 2250 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2251 0, xmesa->xm_buffer->FXctx->height - b->height, /*pos*/ 2252 b->width, b->height, /* size */ 2253 b->width * sizeof(GLushort), /* stride */ 2254 b->backimage->data); /* dest buffer */ 2255 } 2256 else if (xmesa->xm_visual->dithered_pf==PF_DITHER 2257 && GET_VISUAL_DEPTH(xmesa->xm_visual)==8) { 2258 /* Special case: 8bpp RGB */ 2259 for (y=0;y<b->height;y++) { 2260 GLubyte *ptr = (GLubyte*) xmesa->xm_buffer->backimage->data 2261 + xmesa->xm_buffer->backimage->bytes_per_line * y; 2262 XDITHER_SETUP(y); 2263 2264 /* read row from 3Dfx frame buffer */ 2265 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2266 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2267 b->width, 1, 2268 0, 2269 pixbuf ); 2270 2271 /* write to XImage back buffer */ 2272 for (x=0;x<b->width;x++) { 2273 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2274 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2275 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2276 *ptr++ = XDITHER( x, r, g, b); 2277 } 2278 } 2279 } 2280 else { 2281 /* General case: slow! */ 2282 for (y=0;y<b->height;y++) { 2283 /* read row from 3Dfx frame buffer */ 2284 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2285 0, xmesa->xm_buffer->FXctx->height-(b->height-y), 2286 b->width, 1, 2287 0, 2288 pixbuf ); 2289 2290 /* write to XImage back buffer */ 2291 for (x=0;x<b->width;x++) { 2292 XMesaPutPixel(b->backimage,x,y, 2293 xmesa_color_to_pixel(xmesa, 2294 (pixbuf[x] & 0xf800) >> 8, 2295 (pixbuf[x] & 0x07e0) >> 3, 2296 (pixbuf[x] & 0x001f) << 3, 2297 0xff, xmesa->pixelformat)); 2298 } 2299 } 2300 } 2301 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); 2302} 2303#endif 2304 2305 2306/* 2307 * Copy the back buffer to the front buffer. If there's no back buffer 2308 * this is a no-op. 2309 */ 2310void XMesaSwapBuffers( XMesaBuffer b ) 2311{ 2312 GET_CURRENT_CONTEXT(ctx); 2313 2314 /* If we're swapping the buffer associated with the current context 2315 * we have to flush any pending rendering commands first. 2316 */ 2317 if (b->xm_context && b->xm_context->gl_ctx == ctx) 2318 _mesa_swapbuffers(ctx); 2319 2320 if (b->db_state) { 2321#ifdef FX 2322 if (b->FXctx) { 2323 fxMesaSwapBuffers(); 2324 2325 if (b->FXwindowHack) 2326 FXgetImage(b); 2327 else 2328 return; 2329 } 2330#endif 2331 if (b->backimage) { 2332 /* Copy Ximage from host's memory to server's window */ 2333#if defined(USE_XSHM) && !defined(XFree86Server) 2334 if (b->shm) { 2335 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2336 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2337 b->cleargc, 2338 b->backimage, 0, 0, 2339 0, 0, b->width, b->height, False ); 2340 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2341 } 2342 else 2343#endif 2344 { 2345 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2346 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2347 b->cleargc, 2348 b->backimage, 0, 0, 2349 0, 0, b->width, b->height ); 2350 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2351 } 2352 } 2353 else { 2354 /* Copy pixmap to window on server */ 2355 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2356 XMesaCopyArea( b->xm_visual->display, 2357 b->backpixmap, /* source drawable */ 2358 b->frontbuffer, /* dest. drawable */ 2359 b->cleargc, 2360 0, 0, b->width, b->height, /* source region */ 2361 0, 0 /* dest region */ 2362 ); 2363 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2364 } 2365 } 2366#if !defined(XFree86Server) 2367 XSync( b->xm_visual->display, False ); 2368#endif 2369} 2370 2371 2372 2373/* 2374 * Copy sub-region of back buffer to front buffer 2375 */ 2376void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2377{ 2378 GET_CURRENT_CONTEXT(ctx); 2379 2380 /* If we're swapping the buffer associated with the current context 2381 * we have to flush any pending rendering commands first. 2382 */ 2383 if (b->xm_context->gl_ctx == ctx) 2384 _mesa_swapbuffers(ctx); 2385 2386 if (b->db_state) { 2387 int yTop = b->height - y - height; 2388#ifdef FX 2389 if (b->FXctx) { 2390 fxMesaSwapBuffers(); 2391 if (b->FXwindowHack) 2392 FXgetImage(b); 2393 else 2394 return; 2395 } 2396#endif 2397 if (b->backimage) { 2398 /* Copy Ximage from host's memory to server's window */ 2399#if defined(USE_XSHM) && !defined(XFree86Server) 2400 if (b->shm) { 2401 /* XXX assuming width and height aren't too large! */ 2402 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2403 b->cleargc, 2404 b->backimage, x, yTop, 2405 x, yTop, width, height, False ); 2406 /* wait for finished event??? */ 2407 } 2408 else 2409#endif 2410 { 2411 /* XXX assuming width and height aren't too large! */ 2412 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2413 b->cleargc, 2414 b->backimage, x, yTop, 2415 x, yTop, width, height ); 2416 } 2417 } 2418 else { 2419 /* Copy pixmap to window on server */ 2420 XMesaCopyArea( b->xm_visual->display, 2421 b->backpixmap, /* source drawable */ 2422 b->frontbuffer, /* dest. drawable */ 2423 b->cleargc, 2424 x, yTop, width, height, /* source region */ 2425 x, yTop /* dest region */ 2426 ); 2427 } 2428 } 2429} 2430 2431 2432/* 2433 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2434 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2435 * back buffer directly. 2436 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2437 * ximage - pointer to back buffer's XImage, or NULL 2438 * Return: GL_TRUE = context is double buffered 2439 * GL_FALSE = context is single buffered 2440 */ 2441GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2442 XMesaPixmap *pixmap, 2443 XMesaImage **ximage ) 2444{ 2445 if (b->db_state) { 2446 if (pixmap) *pixmap = b->backpixmap; 2447 if (ximage) *ximage = b->backimage; 2448 return GL_TRUE; 2449 } 2450 else { 2451 *pixmap = 0; 2452 *ximage = NULL; 2453 return GL_FALSE; 2454 } 2455} 2456 2457 2458/* 2459 * Return the depth buffer associated with an XMesaBuffer. 2460 * Input: b - the XMesa buffer handle 2461 * Output: width, height - size of buffer in pixels 2462 * bytesPerValue - bytes per depth value (2 or 4) 2463 * buffer - pointer to depth buffer values 2464 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2465 */ 2466GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2467 GLint *bytesPerValue, void **buffer ) 2468{ 2469 if (!b->mesa_buffer.DepthBuffer) { 2470 *width = 0; 2471 *height = 0; 2472 *bytesPerValue = 0; 2473 *buffer = 0; 2474 return GL_FALSE; 2475 } 2476 else { 2477 *width = b->mesa_buffer.Width; 2478 *height = b->mesa_buffer.Height; 2479 *bytesPerValue = sizeof(GLdepth); 2480 *buffer = b->mesa_buffer.DepthBuffer; 2481 return GL_TRUE; 2482 } 2483} 2484 2485 2486void XMesaFlush( XMesaContext c ) 2487{ 2488 if (c && c->xm_visual) { 2489#ifdef XFree86Server 2490 /* NOT_NEEDED */ 2491#else 2492 XSync( c->xm_visual->display, False ); 2493#endif 2494 } 2495} 2496 2497 2498 2499const char *XMesaGetString( XMesaContext c, int name ) 2500{ 2501 (void) c; 2502 if (name==XMESA_VERSION) { 2503 return "3.1"; 2504 } 2505 else if (name==XMESA_EXTENSIONS) { 2506 return ""; 2507 } 2508 else { 2509 return NULL; 2510 } 2511} 2512 2513 2514 2515XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2516{ 2517 XMesaBuffer b; 2518 for (b=XMesaBufferList; b; b=b->Next) { 2519 if (b->frontbuffer==d && b->display==dpy) { 2520 return b; 2521 } 2522 } 2523 return NULL; 2524} 2525 2526 2527 2528/* 2529 * Look for XMesaBuffers whose X window has been destroyed. 2530 * Deallocate any such XMesaBuffers. 2531 */ 2532void XMesaGarbageCollect( void ) 2533{ 2534 XMesaBuffer b, next; 2535 for (b=XMesaBufferList; b; b=next) { 2536 next = b->Next; 2537 if (!b->pixmap_flag) { 2538#ifdef XFree86Server 2539 /* NOT_NEEDED */ 2540#else 2541 XSync(b->display, False); 2542 if (!window_exists( b->display, b->frontbuffer )) { 2543 /* found a dead window, free the ancillary info */ 2544 XMesaDestroyBuffer( b ); 2545 } 2546#endif 2547 } 2548 } 2549} 2550 2551 2552void XMesaReset( void ) 2553{ 2554 while (XMesaBufferList) 2555 XMesaDestroyBuffer(XMesaBufferList); 2556 2557 XMesaBufferList = NULL; 2558} 2559 2560 2561unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2562 GLfloat red, GLfloat green, 2563 GLfloat blue, GLfloat alpha ) 2564{ 2565 GLint r = (GLint) (red * 255.0F); 2566 GLint g = (GLint) (green * 255.0F); 2567 GLint b = (GLint) (blue * 255.0F); 2568 GLint a = (GLint) (alpha * 255.0F); 2569 2570 switch (xmesa->pixelformat) { 2571 case PF_INDEX: 2572 return 0; 2573 case PF_TRUECOLOR: 2574 { 2575 unsigned long p; 2576 PACK_TRUECOLOR( p, r, g, b ); 2577 return p; 2578 } 2579 case PF_8A8B8G8R: 2580 return PACK_8A8B8G8R( r, g, b, a ); 2581 case PF_8R8G8B: 2582 return PACK_8R8G8B( r, g, b ); 2583 case PF_5R6G5B: 2584 return PACK_5R6G5B( r, g, b ); 2585 case PF_DITHER: 2586 { 2587 DITHER_SETUP; 2588 return DITHER( x, y, r, g, b ); 2589 } 2590 case PF_1BIT: 2591 /* 382 = (3*255)/2 */ 2592 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2593 case PF_HPCR: 2594 return DITHER_HPCR(x, y, r, g, b); 2595 case PF_LOOKUP: 2596 { 2597 LOOKUP_SETUP; 2598 return LOOKUP( r, g, b ); 2599 } 2600 case PF_GRAYSCALE: 2601 return GRAY_RGB( r, g, b ); 2602 case PF_DITHER_5R6G5B: 2603 /* fall through */ 2604 case PF_TRUEDITHER: 2605 { 2606 unsigned long p; 2607 PACK_TRUEDITHER(p, x, y, r, g, b); 2608 return p; 2609 } 2610 default: 2611 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2612 } 2613 return 0; 2614} 2615 2616 2617