xm_api.c revision 304d3aa9cb727eb4cd4797c33f8e13e5ac4285a9
1/* 2 * Mesa 3-D graphics library 3 * Version: 6.1 4 * 5 * Copyright (C) 1999-2004 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 * This file contains the implementations of all the XMesa* functions. 27 * 28 * 29 * NOTES: 30 * 31 * The window coordinate system origin (0,0) is in the lower-left corner 32 * of the window. X11's window coordinate origin is in the upper-left 33 * corner of the window. Therefore, most drawing functions in this 34 * file have to flip Y coordinates. 35 * 36 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 37 * in support for the MIT Shared Memory extension. If enabled, when you 38 * use an Ximage for the back buffer in double buffered mode, the "swap" 39 * operation will be faster. You must also link with -lXext. 40 * 41 * Byte swapping: If the Mesa host and the X display use a different 42 * byte order then there's some trickiness to be aware of when using 43 * XImages. The byte ordering used for the XImage is that of the X 44 * display, not the Mesa host. 45 * The color-to-pixel encoding for True/DirectColor must be done 46 * according to the display's visual red_mask, green_mask, and blue_mask. 47 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 48 * do byte swapping if needed. If one wants to directly "poke" the pixel 49 * into the XImage's buffer then the pixel must be byte swapped first. In 50 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 51 * and use XPutPixel everywhere except in the implementation of 52 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 53 * instead of using XPutPixel we "poke" our values after byte-swapping 54 * the clear pixel value if needed. 55 * 56 */ 57 58#ifdef __CYGWIN__ 59#undef WIN32 60#undef __WIN32__ 61#endif 62 63#include "glxheader.h" 64#include "GL/xmesa.h" 65#include "xmesaP.h" 66#include "context.h" 67#include "extensions.h" 68#include "glthread.h" 69#include "imports.h" 70#include "matrix.h" 71#include "mtypes.h" 72#include "macros.h" 73#include "texformat.h" 74#include "texobj.h" 75#include "texstore.h" 76#include "swrast/swrast.h" 77#include "swrast_setup/swrast_setup.h" 78#include "array_cache/acache.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#ifdef XFree86Server 85#include <GL/glxtokens.h> 86#endif 87 88/* 89 * Global X driver lock 90 */ 91_glthread_Mutex _xmesa_lock; 92 93 94 95/* 96 * Lookup tables for HPCR pixel format: 97 */ 98static short hpcr_rgbTbl[3][256] = { 99{ 100 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 101 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 102 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 103 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 104 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 105 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 106 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 107 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 108112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 109128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 110144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 111160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 112176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 113192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 114208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 115224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 116}, 117{ 118 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 119 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 120 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 121 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 122 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 123 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 124 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 125 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 126112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 127128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 128144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 129160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 130176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 131192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 132208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 133224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 134}, 135{ 136 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 137 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 138 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 139 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 140 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 141 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 142 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 143 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 144 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 145112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 146128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 147144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 148160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 149176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 150192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 151208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 152} 153}; 154 155 156 157/**********************************************************************/ 158/***** X Utility Functions *****/ 159/**********************************************************************/ 160 161 162/* 163 * Return the host's byte order as LSBFirst or MSBFirst ala X. 164 */ 165#ifndef XFree86Server 166static int host_byte_order( void ) 167{ 168 int i = 1; 169 char *cptr = (char *) &i; 170 return (*cptr==1) ? LSBFirst : MSBFirst; 171} 172#endif 173 174 175/* 176 * Error handling. 177 */ 178#ifndef XFree86Server 179static volatile int mesaXErrorFlag = 0; 180 181static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 182{ 183 (void) dpy; 184 (void) event; 185 mesaXErrorFlag = 1; 186 return 0; 187} 188#endif 189 190 191/* 192 * Check if the X Shared Memory extension is available. 193 * Return: 0 = not available 194 * 1 = shared XImage support available 195 * 2 = shared Pixmap support available also 196 */ 197#ifndef XFree86Server 198static int check_for_xshm( XMesaDisplay *display ) 199{ 200#ifdef USE_XSHM 201 int major, minor, ignore; 202 Bool pixmaps; 203 204 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 205 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 206 return (pixmaps==True) ? 2 : 1; 207 } 208 else { 209 return 0; 210 } 211 } 212 else { 213 return 0; 214 } 215#else 216 /* Can't compile XSHM support */ 217 return 0; 218#endif 219} 220#endif 221 222 223/* 224 * Return the width and height of the given drawable. 225 */ 226static void get_drawable_size( XMesaDisplay *dpy, XMesaDrawable d, 227 unsigned int *width, unsigned int *height) 228{ 229#ifdef XFree86Server 230 (void) dpy; 231 *width = d->width; 232 *height = d->height; 233#else 234 Window root; 235 int x, y; 236 unsigned int bw, depth; 237 238 _glthread_LOCK_MUTEX(_xmesa_lock); 239 XGetGeometry( dpy, d, &root, &x, &y, width, height, &bw, &depth ); 240 _glthread_UNLOCK_MUTEX(_xmesa_lock); 241#endif 242} 243 244 245/* 246 * Apply gamma correction to an intensity value in [0..max]. Return the 247 * new intensity value. 248 */ 249static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 250{ 251 if (gamma == 1.0) { 252 return value; 253 } 254 else { 255 double x = (double) value / (double) max; 256 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 257 } 258} 259 260 261 262/* 263 * Return the true number of bits per pixel for XImages. 264 * For example, if we request a 24-bit deep visual we may actually need/get 265 * 32bpp XImages. This function returns the appropriate bpp. 266 * Input: dpy - the X display 267 * visinfo - desribes the visual to be used for XImages 268 * Return: true number of bits per pixel for XImages 269 */ 270#ifdef XFree86Server 271 272static int bits_per_pixel( XMesaVisual xmv ) 273{ 274 const int depth = xmv->nplanes; 275 int i; 276 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 277 if (screenInfo.formats[i].depth == depth) 278 return screenInfo.formats[i].bitsPerPixel; 279 } 280 return depth; /* should never get here, but this should be safe */ 281} 282 283#else 284 285static int bits_per_pixel( XMesaVisual xmv ) 286{ 287 XMesaDisplay *dpy = xmv->display; 288 XMesaVisualInfo visinfo = xmv->visinfo; 289 XMesaImage *img; 290 int bitsPerPixel; 291 /* Create a temporary XImage */ 292 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 293 ZPixmap, 0, /*format, offset*/ 294 (char*) MALLOC(8), /*data*/ 295 1, 1, /*width, height*/ 296 32, /*bitmap_pad*/ 297 0 /*bytes_per_line*/ 298 ); 299 assert(img); 300 /* grab the bits/pixel value */ 301 bitsPerPixel = img->bits_per_pixel; 302 /* free the XImage */ 303 FREE( img->data ); 304 img->data = NULL; 305 XMesaDestroyImage( img ); 306 return bitsPerPixel; 307} 308#endif 309 310 311 312/* 313 * Determine if a given X window ID is valid (window exists). 314 * Do this by calling XGetWindowAttributes() for the window and 315 * checking if we catch an X error. 316 * Input: dpy - the display 317 * win - the window to check for existance 318 * Return: GL_TRUE - window exists 319 * GL_FALSE - window doesn't exist 320 */ 321#ifndef XFree86Server 322static GLboolean WindowExistsFlag; 323 324static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 325{ 326 (void) dpy; 327 if (xerr->error_code == BadWindow) { 328 WindowExistsFlag = GL_FALSE; 329 } 330 return 0; 331} 332 333static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 334{ 335 XWindowAttributes wa; 336 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 337 WindowExistsFlag = GL_TRUE; 338 old_handler = XSetErrorHandler(window_exists_err_handler); 339 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 340 XSetErrorHandler(old_handler); 341 return WindowExistsFlag; 342} 343#endif 344 345 346 347/**********************************************************************/ 348/***** Linked list of XMesaBuffers *****/ 349/**********************************************************************/ 350 351static XMesaBuffer XMesaBufferList = NULL; 352 353 354/* Allocate a new XMesaBuffer, add to linked list */ 355static XMesaBuffer alloc_xmesa_buffer(void) 356{ 357 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 358 if (b) { 359 b->Next = XMesaBufferList; 360 XMesaBufferList = b; 361 } 362 return b; 363} 364 365 366/* 367 * Find an XMesaBuffer by matching X display and colormap but NOT matching 368 * the notThis buffer. 369 */ 370static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 371 XMesaColormap cmap, 372 XMesaBuffer notThis) 373{ 374 XMesaBuffer b; 375 for (b=XMesaBufferList; b; b=b->Next) { 376 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 377 return b; 378 } 379 } 380 return NULL; 381} 382 383 384/* 385 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 386 * entries. 387 */ 388static void free_xmesa_buffer(int client, XMesaBuffer buffer) 389{ 390 XMesaBuffer prev = NULL, b; 391 (void) client; 392 for (b=XMesaBufferList; b; b=b->Next) { 393 if (b==buffer) { 394 /* unlink bufer from list */ 395 if (prev) 396 prev->Next = buffer->Next; 397 else 398 XMesaBufferList = buffer->Next; 399 /* Check to free X colors */ 400 if (buffer->num_alloced>0) { 401 /* If no other buffer uses this X colormap then free the colors. */ 402 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 403#ifdef XFree86Server 404 (void)FreeColors(buffer->cmap, client, 405 buffer->num_alloced, buffer->alloced_colors, 406 0); 407#else 408 XFreeColors(buffer->display, buffer->cmap, 409 buffer->alloced_colors, buffer->num_alloced, 0); 410#endif 411 } 412 } 413 414 _mesa_free_framebuffer_data(&buffer->mesa_buffer); 415 FREE(buffer); 416 417 return; 418 } 419 /* continue search */ 420 prev = b; 421 } 422 /* buffer not found in XMesaBufferList */ 423 _mesa_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 424} 425 426 427/* Copy X color table stuff from one XMesaBuffer to another. */ 428static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 429{ 430 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 431 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 432 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 433 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 434 dst->num_alloced = src->num_alloced; 435 MEMCPY(dst->alloced_colors, src->alloced_colors, 436 sizeof(src->alloced_colors)); 437} 438 439 440 441/**********************************************************************/ 442/***** Misc Private Functions *****/ 443/**********************************************************************/ 444 445 446/* 447 * Return number of bits set in n. 448 */ 449static int bitcount( unsigned long n ) 450{ 451 int bits; 452 for (bits=0; n>0; n=n>>1) { 453 if (n&1) { 454 bits++; 455 } 456 } 457 return bits; 458} 459 460 461 462/* 463 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 464 * Return: GL_TRUE if success, GL_FALSE if error 465 */ 466#ifndef XFree86Server 467static GLboolean alloc_shm_back_buffer( XMesaBuffer b ) 468{ 469#ifdef USE_XSHM 470 /* 471 * We have to do a _lot_ of error checking here to be sure we can 472 * really use the XSHM extension. It seems different servers trigger 473 * errors at different points if the extension won't work. Therefore 474 * we have to be very careful... 475 */ 476 GC gc; 477 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 478 479 b->backimage = XShmCreateImage( b->xm_visual->display, 480 b->xm_visual->visinfo->visual, 481 b->xm_visual->visinfo->depth, 482 ZPixmap, NULL, &b->shminfo, 483 b->width, b->height ); 484 if (b->backimage == NULL) { 485 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 486 b->shm = 0; 487 return GL_FALSE; 488 } 489 490 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backimage->bytes_per_line 491 * b->backimage->height, IPC_CREAT|0777 ); 492 if (b->shminfo.shmid < 0) { 493 _mesa_warning(NULL, "shmget failed while allocating back buffer"); 494 XDestroyImage( b->backimage ); 495 b->backimage = NULL; 496 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmget), disabling."); 497 b->shm = 0; 498 return GL_FALSE; 499 } 500 501 b->shminfo.shmaddr = b->backimage->data 502 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 503 if (b->shminfo.shmaddr == (char *) -1) { 504 _mesa_warning(NULL, "shmat() failed while allocating back buffer"); 505 XDestroyImage( b->backimage ); 506 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 507 b->backimage = NULL; 508 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmat), disabling."); 509 b->shm = 0; 510 return GL_FALSE; 511 } 512 513 b->shminfo.readOnly = False; 514 mesaXErrorFlag = 0; 515 old_handler = XSetErrorHandler( mesaHandleXError ); 516 /* This may trigger the X protocol error we're ready to catch: */ 517 XShmAttach( b->xm_visual->display, &b->shminfo ); 518 XSync( b->xm_visual->display, False ); 519 520 if (mesaXErrorFlag) { 521 /* we are on a remote display, this error is normal, don't print it */ 522 XFlush( b->xm_visual->display ); 523 mesaXErrorFlag = 0; 524 XDestroyImage( b->backimage ); 525 shmdt( b->shminfo.shmaddr ); 526 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 527 b->backimage = NULL; 528 b->shm = 0; 529 (void) XSetErrorHandler( old_handler ); 530 return GL_FALSE; 531 } 532 533 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 534 535 /* Finally, try an XShmPutImage to be really sure the extension works */ 536 gc = XCreateGC( b->xm_visual->display, b->frontbuffer, 0, NULL ); 537 XShmPutImage( b->xm_visual->display, b->frontbuffer, gc, 538 b->backimage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 539 XSync( b->xm_visual->display, False ); 540 XFreeGC( b->xm_visual->display, gc ); 541 (void) XSetErrorHandler( old_handler ); 542 if (mesaXErrorFlag) { 543 XFlush( b->xm_visual->display ); 544 mesaXErrorFlag = 0; 545 XDestroyImage( b->backimage ); 546 shmdt( b->shminfo.shmaddr ); 547 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 548 b->backimage = NULL; 549 b->shm = 0; 550 return GL_FALSE; 551 } 552 553 if (b->backimage) { 554 int height = b->backimage->height; 555 /* Needed by PIXELADDR1 macro */ 556 b->ximage_width1 = b->backimage->bytes_per_line; 557 b->ximage_origin1 = (GLubyte *) b->backimage->data 558 + b->ximage_width1 * (height-1); 559 /* Needed by PIXELADDR2 macro */ 560 b->ximage_width2 = b->backimage->bytes_per_line / 2; 561 b->ximage_origin2 = (GLushort *) b->backimage->data 562 + b->ximage_width2 * (height-1); 563 /* Needed by PIXELADDR3 macro */ 564 b->ximage_width3 = b->backimage->bytes_per_line; 565 b->ximage_origin3 = (GLubyte *) b->backimage->data 566 + b->ximage_width3 * (height-1); 567 /* Needed by PIXELADDR4 macro */ 568 b->ximage_width4 = b->backimage->width; 569 b->ximage_origin4 = (GLuint *) b->backimage->data 570 + b->ximage_width4 * (height-1); 571 } 572 573 return GL_TRUE; 574#else 575 /* Can't compile XSHM support */ 576 return GL_FALSE; 577#endif 578} 579#endif 580 581 582 583/* 584 * Setup an off-screen pixmap or Ximage to use as the back buffer. 585 * Input: b - the X/Mesa buffer 586 */ 587void xmesa_alloc_back_buffer( XMesaBuffer b ) 588{ 589 if (b->db_state==BACK_XIMAGE) { 590 /* Deallocate the old backimage, if any */ 591 if (b->backimage) { 592#if defined(USE_XSHM) && !defined(XFree86Server) 593 if (b->shm) { 594 XShmDetach( b->xm_visual->display, &b->shminfo ); 595 XDestroyImage( b->backimage ); 596 shmdt( b->shminfo.shmaddr ); 597 } 598 else 599#endif 600 XMesaDestroyImage( b->backimage ); 601 b->backimage = NULL; 602 } 603 604 /* Allocate new back buffer */ 605#ifdef XFree86Server 606 { 607 /* Allocate a regular XImage for the back buffer. */ 608 b->backimage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 609 b->width, b->height, NULL); 610#else 611 if (b->shm==0 || alloc_shm_back_buffer(b)==GL_FALSE) { 612 /* Allocate a regular XImage for the back buffer. */ 613 b->backimage = XCreateImage( b->xm_visual->display, 614 b->xm_visual->visinfo->visual, 615 GET_VISUAL_DEPTH(b->xm_visual), 616 ZPixmap, 0, /* format, offset */ 617 NULL, b->width, b->height, 618 8, 0 ); /* pad, bytes_per_line */ 619#endif 620 if (!b->backimage) { 621 _mesa_warning(NULL, "alloc_back_buffer: XCreateImage failed."); 622 } 623 b->backimage->data = (char *) MALLOC( b->backimage->height 624 * b->backimage->bytes_per_line ); 625 if (!b->backimage->data) { 626 _mesa_warning(NULL, "alloc_back_buffer: MALLOC failed."); 627 XMesaDestroyImage( b->backimage ); 628 b->backimage = NULL; 629 } 630 } 631 b->backpixmap = None; 632 } 633 else if (b->db_state==BACK_PIXMAP) { 634 XMesaPixmap old_pixmap = b->backpixmap; 635 /* Free the old back pixmap */ 636 if (b->backpixmap) { 637 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 638 } 639 /* Allocate new back pixmap */ 640 b->backpixmap = XMesaCreatePixmap( b->xm_visual->display, b->frontbuffer, 641 b->width, b->height, 642 GET_VISUAL_DEPTH(b->xm_visual) ); 643 b->backimage = NULL; 644 /* update other references to backpixmap */ 645 if (b->buffer==(XMesaDrawable)old_pixmap) { 646 b->buffer = (XMesaDrawable)b->backpixmap; 647 } 648 } 649} 650 651 652 653/* 654 * A replacement for XAllocColor. This function should never 655 * fail to allocate a color. When XAllocColor fails, we return 656 * the nearest matching color. If we have to allocate many colors 657 * this function isn't too efficient; the XQueryColors() could be 658 * done just once. 659 * Written by Michael Pichler, Brian Paul, Mark Kilgard 660 * Input: dpy - X display 661 * cmap - X colormap 662 * cmapSize - size of colormap 663 * In/Out: color - the XColor struct 664 * Output: exact - 1=exact color match, 0=closest match 665 * alloced - 1=XAlloc worked, 0=XAlloc failed 666 */ 667static void 668noFaultXAllocColor( int client, 669 XMesaDisplay *dpy, 670 XMesaColormap cmap, 671 int cmapSize, 672 XMesaColor *color, 673 int *exact, int *alloced ) 674{ 675#ifdef XFree86Server 676 Pixel *ppixIn; 677 xrgb *ctable; 678#else 679 /* we'll try to cache ctable for better remote display performance */ 680 static Display *prevDisplay = NULL; 681 static XMesaColormap prevCmap = 0; 682 static int prevCmapSize = 0; 683 static XMesaColor *ctable = NULL; 684#endif 685 XMesaColor subColor; 686 int i, bestmatch; 687 double mindist; /* 3*2^16^2 exceeds long int precision. */ 688 689 (void) client; 690 691 /* First try just using XAllocColor. */ 692#ifdef XFree86Server 693 if (AllocColor(cmap, 694 &color->red, &color->green, &color->blue, 695 &color->pixel, 696 client) == Success) { 697#else 698 if (XAllocColor(dpy, cmap, color)) { 699#endif 700 *exact = 1; 701 *alloced = 1; 702 return; 703 } 704 705 /* Alloc failed, search for closest match */ 706 707 /* Retrieve color table entries. */ 708 /* XXX alloca candidate. */ 709#ifdef XFree86Server 710 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 711 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 712 for (i = 0; i < cmapSize; i++) { 713 ppixIn[i] = i; 714 } 715 QueryColors(cmap, cmapSize, ppixIn, ctable); 716#else 717 if (prevDisplay != dpy || prevCmap != cmap 718 || prevCmapSize != cmapSize || !ctable) { 719 /* free previously cached color table */ 720 if (ctable) 721 FREE(ctable); 722 /* Get the color table from X */ 723 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 724 assert(ctable); 725 for (i = 0; i < cmapSize; i++) { 726 ctable[i].pixel = i; 727 } 728 XQueryColors(dpy, cmap, ctable, cmapSize); 729 prevDisplay = dpy; 730 prevCmap = cmap; 731 prevCmapSize = cmapSize; 732 } 733#endif 734 735 /* Find best match. */ 736 bestmatch = -1; 737 mindist = 0.0; 738 for (i = 0; i < cmapSize; i++) { 739 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 740 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 741 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 742 double dist = dr * dr + dg * dg + db * db; 743 if (bestmatch < 0 || dist < mindist) { 744 bestmatch = i; 745 mindist = dist; 746 } 747 } 748 749 /* Return result. */ 750 subColor.red = ctable[bestmatch].red; 751 subColor.green = ctable[bestmatch].green; 752 subColor.blue = ctable[bestmatch].blue; 753 /* Try to allocate the closest match color. This should only 754 * fail if the cell is read/write. Otherwise, we're incrementing 755 * the cell's reference count. 756 */ 757#ifdef XFree86Server 758 if (AllocColor(cmap, 759 &subColor.red, &subColor.green, &subColor.blue, 760 &subColor.pixel, 761 client) == Success) { 762#else 763 if (XAllocColor(dpy, cmap, &subColor)) { 764#endif 765 *alloced = 1; 766 } 767 else { 768 /* do this to work around a problem reported by Frank Ortega */ 769 subColor.pixel = (unsigned long) bestmatch; 770 subColor.red = ctable[bestmatch].red; 771 subColor.green = ctable[bestmatch].green; 772 subColor.blue = ctable[bestmatch].blue; 773 subColor.flags = DoRed | DoGreen | DoBlue; 774 *alloced = 0; 775 } 776#ifdef XFree86Server 777 FREE(ppixIn); 778 FREE(ctable); 779#else 780 /* don't free table, save it for next time */ 781#endif 782 783 *color = subColor; 784 *exact = 0; 785} 786 787 788 789 790/* 791 * Do setup for PF_GRAYSCALE pixel format. 792 * Note that buffer may be NULL. 793 */ 794static GLboolean setup_grayscale( int client, XMesaVisual v, 795 XMesaBuffer buffer, XMesaColormap cmap ) 796{ 797 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 798 return GL_FALSE; 799 } 800 801 if (buffer) { 802 XMesaBuffer prevBuffer; 803 804 if (!cmap) { 805 return GL_FALSE; 806 } 807 808 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 809 if (prevBuffer && 810 (buffer->xm_visual->mesa_visual.rgbMode == 811 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 812 /* Copy colormap stuff from previous XMesaBuffer which uses same 813 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 814 */ 815 copy_colortable_info(buffer, prevBuffer); 816 } 817 else { 818 /* Allocate 256 shades of gray */ 819 int gray; 820 int colorsfailed = 0; 821 for (gray=0;gray<256;gray++) { 822 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 823 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 824 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 825 int exact, alloced; 826 XMesaColor xcol; 827 xcol.red = (r << 8) | r; 828 xcol.green = (g << 8) | g; 829 xcol.blue = (b << 8) | b; 830 noFaultXAllocColor( client, v->display, 831 cmap, GET_COLORMAP_SIZE(v), 832 &xcol, &exact, &alloced ); 833 if (!exact) { 834 colorsfailed++; 835 } 836 if (alloced) { 837 assert(buffer->num_alloced<256); 838 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 839 buffer->num_alloced++; 840 } 841 842 /*OLD 843 assert(gray < 576); 844 buffer->color_table[gray*3+0] = xcol.pixel; 845 buffer->color_table[gray*3+1] = xcol.pixel; 846 buffer->color_table[gray*3+2] = xcol.pixel; 847 assert(xcol.pixel < 65536); 848 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 849 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 850 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 851 */ 852 buffer->color_table[gray] = xcol.pixel; 853 assert(xcol.pixel < 65536); 854 buffer->pixel_to_r[xcol.pixel] = gray; 855 buffer->pixel_to_g[xcol.pixel] = gray; 856 buffer->pixel_to_b[xcol.pixel] = gray; 857 } 858 859 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 860 _mesa_warning(NULL, 861 "Note: %d out of 256 needed colors do not match exactly.\n", 862 colorsfailed ); 863 } 864 } 865 } 866 867 v->dithered_pf = PF_Grayscale; 868 v->undithered_pf = PF_Grayscale; 869 return GL_TRUE; 870} 871 872 873 874/* 875 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 876 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 877 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 878 * color. While this function was originally designed just for 8-bit 879 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 880 * Dithering code contributed by Bob Mercier. 881 */ 882static GLboolean setup_dithered_color( int client, XMesaVisual v, 883 XMesaBuffer buffer, XMesaColormap cmap ) 884{ 885 (void) DitherValues; /* silence warning */ 886 887 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 888 return GL_FALSE; 889 } 890 891 if (buffer) { 892 XMesaBuffer prevBuffer; 893 894 if (!cmap) { 895 return GL_FALSE; 896 } 897 898 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 899 if (prevBuffer && 900 (buffer->xm_visual->mesa_visual.rgbMode == 901 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 902 /* Copy colormap stuff from previous, matching XMesaBuffer. 903 * Do this to avoid time spent in noFaultXAllocColor. 904 */ 905 copy_colortable_info(buffer, prevBuffer); 906 } 907 else { 908 /* Allocate X colors and initialize color_table[], red_table[], etc */ 909 int r, g, b, i; 910 int colorsfailed = 0; 911 for (r = 0; r < DITH_R; r++) { 912 for (g = 0; g < DITH_G; g++) { 913 for (b = 0; b < DITH_B; b++) { 914 XMesaColor xcol; 915 int exact, alloced; 916 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 917 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 918 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 919 noFaultXAllocColor( client, v->display, 920 cmap, GET_COLORMAP_SIZE(v), 921 &xcol, &exact, &alloced ); 922 if (!exact) { 923 colorsfailed++; 924 } 925 if (alloced) { 926 assert(buffer->num_alloced<256); 927 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 928 buffer->num_alloced++; 929 } 930 i = DITH_MIX( r, g, b ); 931 assert(i < 576); 932 buffer->color_table[i] = xcol.pixel; 933 assert(xcol.pixel < 65536); 934 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 935 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 936 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 937 } 938 } 939 } 940 941 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 942 _mesa_warning(NULL, 943 "Note: %d out of %d needed colors do not match exactly.\n", 944 colorsfailed, DITH_R * DITH_G * DITH_B ); 945 } 946 } 947 } 948 949 v->dithered_pf = PF_Dither; 950 v->undithered_pf = PF_Lookup; 951 return GL_TRUE; 952} 953 954 955/* 956 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 957 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 958 * Special dithering tables have to be initialized. 959 */ 960static void setup_8bit_hpcr( XMesaVisual v ) 961{ 962 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 963 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 964 * on the root window AND the colormap obtainable by XGetRGBColormaps 965 * for that atom must be set on the window. (see also tkInitWindow) 966 * If that colormap is not set, the output will look stripy. 967 */ 968 969 /* Setup color tables with gamma correction */ 970 int i; 971 double g; 972 973 g = 1.0 / v->RedGamma; 974 for (i=0; i<256; i++) { 975 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 976 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 977 } 978 979 g = 1.0 / v->GreenGamma; 980 for (i=0; i<256; i++) { 981 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 982 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 983 } 984 985 g = 1.0 / v->BlueGamma; 986 for (i=0; i<256; i++) { 987 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 988 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 989 } 990 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 991 v->dithered_pf = PF_HPCR; 992 993 /* which method should I use to clear */ 994 /* GL_FALSE: keep the ordinary method */ 995 /* GL_TRUE : clear with dither pattern */ 996 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 997 998 if (v->hpcr_clear_flag) { 999 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 1000 DefaultRootWindow(v->display), 1001 16, 2, 8); 1002#ifndef XFree86Server 1003 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1004 0, 0, 16, 2, AllPlanes, ZPixmap); 1005#endif 1006 } 1007} 1008 1009 1010/* 1011 * Setup RGB rendering for a window with a True/DirectColor visual. 1012 */ 1013static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1014 XMesaColormap cmap ) 1015{ 1016 unsigned long rmask, gmask, bmask; 1017 (void) buffer; 1018 (void) cmap; 1019 1020 /* Compute red multiplier (mask) and bit shift */ 1021 v->rshift = 0; 1022 rmask = GET_REDMASK(v); 1023 while ((rmask & 1)==0) { 1024 v->rshift++; 1025 rmask = rmask >> 1; 1026 } 1027 1028 /* Compute green multiplier (mask) and bit shift */ 1029 v->gshift = 0; 1030 gmask = GET_GREENMASK(v); 1031 while ((gmask & 1)==0) { 1032 v->gshift++; 1033 gmask = gmask >> 1; 1034 } 1035 1036 /* Compute blue multiplier (mask) and bit shift */ 1037 v->bshift = 0; 1038 bmask = GET_BLUEMASK(v); 1039 while ((bmask & 1)==0) { 1040 v->bshift++; 1041 bmask = bmask >> 1; 1042 } 1043 1044 /* 1045 * Compute component-to-pixel lookup tables and dithering kernel 1046 */ 1047 { 1048 static GLubyte kernel[16] = { 1049 0*16, 8*16, 2*16, 10*16, 1050 12*16, 4*16, 14*16, 6*16, 1051 3*16, 11*16, 1*16, 9*16, 1052 15*16, 7*16, 13*16, 5*16, 1053 }; 1054 GLint rBits = bitcount(rmask); 1055 GLint gBits = bitcount(gmask); 1056 GLint bBits = bitcount(bmask); 1057 GLint maxBits; 1058 GLuint i; 1059 1060 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1061 for (i=0; i<=rmask; i++) 1062 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1063 for (i=0; i<=gmask; i++) 1064 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1065 for (i=0; i<=bmask; i++) 1066 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1067 1068 /* convert RGB values from [0,255] to pixel components */ 1069 1070 for (i=0;i<256;i++) { 1071 GLint r = gamma_adjust(v->RedGamma, i, 255); 1072 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1073 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1074 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1075 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1076 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1077 } 1078 /* overflow protection */ 1079 for (i=256;i<512;i++) { 1080 v->RtoPixel[i] = v->RtoPixel[255]; 1081 v->GtoPixel[i] = v->GtoPixel[255]; 1082 v->BtoPixel[i] = v->BtoPixel[255]; 1083 } 1084 1085 /* setup dithering kernel */ 1086 maxBits = rBits; 1087 if (gBits > maxBits) maxBits = gBits; 1088 if (bBits > maxBits) maxBits = bBits; 1089 for (i=0;i<16;i++) { 1090 v->Kernel[i] = kernel[i] >> maxBits; 1091 } 1092 1093 v->undithered_pf = PF_Truecolor; 1094 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 1095 } 1096 1097 /* 1098 * Now check for TrueColor visuals which we can optimize. 1099 */ 1100 if ( GET_REDMASK(v) ==0x0000ff 1101 && GET_GREENMASK(v)==0x00ff00 1102 && GET_BLUEMASK(v) ==0xff0000 1103 && CHECK_BYTE_ORDER(v) 1104 && v->BitsPerPixel==32 1105 && sizeof(GLuint)==4 1106 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1107 /* common 32 bpp config used on SGI, Sun */ 1108 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1109 } 1110 else if (GET_REDMASK(v) ==0xff0000 1111 && GET_GREENMASK(v)==0x00ff00 1112 && GET_BLUEMASK(v) ==0x0000ff 1113 && CHECK_BYTE_ORDER(v) 1114 && v->BitsPerPixel==32 1115 && sizeof(GLuint)==4 1116 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1117 /* common 32 bpp config used on Linux, HP, IBM */ 1118 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1119 } 1120 else if (GET_REDMASK(v) ==0xff0000 1121 && GET_GREENMASK(v)==0x00ff00 1122 && GET_BLUEMASK(v) ==0x0000ff 1123 && CHECK_BYTE_ORDER(v) 1124 && v->BitsPerPixel==24 1125 && sizeof(GLuint)==4 1126 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1127 /* common packed 24 bpp config used on Linux */ 1128 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1129 } 1130 else if (GET_REDMASK(v) ==0xf800 1131 && GET_GREENMASK(v)==0x07e0 1132 && GET_BLUEMASK(v) ==0x001f 1133 && CHECK_BYTE_ORDER(v) 1134 && v->BitsPerPixel==16 1135 && sizeof(GLushort)==2 1136 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1137 /* 5-6-5 color weight on common PC VGA boards */ 1138 v->undithered_pf = PF_5R6G5B; 1139 v->dithered_pf = PF_Dither_5R6G5B; 1140 } 1141 else if (GET_REDMASK(v) ==0xe0 1142 && GET_GREENMASK(v)==0x1c 1143 && GET_BLUEMASK(v) ==0x03 1144 && CHECK_FOR_HPCR(v)) { 1145 setup_8bit_hpcr( v ); 1146 } 1147} 1148 1149 1150 1151/* 1152 * Setup RGB rendering for a window with a monochrome visual. 1153 */ 1154static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1155{ 1156 (void) b; 1157 v->dithered_pf = v->undithered_pf = PF_1Bit; 1158 /* if black=1 then we must flip pixel values */ 1159 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1160} 1161 1162 1163 1164/* 1165 * When a context is "made current" for the first time, we can finally 1166 * finish initializing the context's visual and buffer information. 1167 * Input: v - the XMesaVisual to initialize 1168 * b - the XMesaBuffer to initialize (may be NULL) 1169 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1170 * window - the window/pixmap we're rendering into 1171 * cmap - the colormap associated with the window/pixmap 1172 * Return: GL_TRUE=success, GL_FALSE=failure 1173 */ 1174static GLboolean initialize_visual_and_buffer( int client, 1175 XMesaVisual v, 1176 XMesaBuffer b, 1177 GLboolean rgb_flag, 1178 XMesaDrawable window, 1179 XMesaColormap cmap ) 1180{ 1181#ifndef XFree86Server 1182 XGCValues gcvalues; 1183#endif 1184 1185 if (b) { 1186 assert(b->xm_visual == v); 1187 } 1188 1189 /* Save true bits/pixel */ 1190 v->BitsPerPixel = bits_per_pixel(v); 1191 assert(v->BitsPerPixel > 0); 1192 1193 1194 if (rgb_flag==GL_FALSE) { 1195 /* COLOR-INDEXED WINDOW: 1196 * Even if the visual is TrueColor or DirectColor we treat it as 1197 * being color indexed. This is weird but might be useful to someone. 1198 */ 1199 v->dithered_pf = v->undithered_pf = PF_Index; 1200 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1201 } 1202 else { 1203 /* RGB WINDOW: 1204 * We support RGB rendering into almost any kind of visual. 1205 */ 1206 const int xclass = v->mesa_visual.visualType; 1207 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1208 setup_truecolor( v, b, cmap ); 1209 } 1210 else if (xclass==GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v)==1) { 1211 setup_monochrome( v, b ); 1212 } 1213 else if (xclass==GLX_GRAY_SCALE || xclass==GLX_STATIC_GRAY) { 1214 if (!setup_grayscale( client, v, b, cmap )) { 1215 return GL_FALSE; 1216 } 1217 } 1218 else if ((xclass==GLX_PSEUDO_COLOR || xclass==GLX_STATIC_COLOR) 1219 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1220 if (!setup_dithered_color( client, v, b, cmap )) { 1221 return GL_FALSE; 1222 } 1223 } 1224 else { 1225 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual."); 1226 return GL_FALSE; 1227 } 1228 v->mesa_visual.indexBits = 0; 1229 1230 if (_mesa_getenv("MESA_NO_DITHER")) { 1231 v->dithered_pf = v->undithered_pf; 1232 } 1233 } 1234 1235 1236 /* 1237 * If MESA_INFO env var is set print out some debugging info 1238 * which can help Brian figure out what's going on when a user 1239 * reports bugs. 1240 */ 1241 if (_mesa_getenv("MESA_INFO")) { 1242 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1243 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1244 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1245 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1246 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1247 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1248 } 1249 1250 if (b && window) { 1251 /* Do window-specific initializations */ 1252 1253 /* Window dimensions */ 1254 unsigned int w, h; 1255 get_drawable_size( v->display, window, &w, &h ); 1256 b->width = w; 1257 b->height = h; 1258 1259 b->frontbuffer = window; 1260 1261 /* Setup for single/double buffering */ 1262 if (v->mesa_visual.doubleBufferMode) { 1263 /* Double buffered */ 1264#ifndef XFree86Server 1265 b->shm = check_for_xshm( v->display ); 1266#endif 1267 xmesa_alloc_back_buffer( b ); 1268 if (b->db_state==BACK_PIXMAP) { 1269 b->buffer = (XMesaDrawable)b->backpixmap; 1270 } 1271 else { 1272 b->buffer = XIMAGE; 1273 } 1274 } 1275 else { 1276 /* Single Buffered */ 1277 b->buffer = b->frontbuffer; 1278 } 1279 1280 /* X11 graphics contexts */ 1281#ifdef XFree86Server 1282 b->gc = CreateScratchGC(v->display, window->depth); 1283#else 1284 b->gc = XCreateGC( v->display, window, 0, NULL ); 1285#endif 1286 XMesaSetFunction( v->display, b->gc, GXcopy ); 1287 1288 /* cleargc - for glClear() */ 1289#ifdef XFree86Server 1290 b->cleargc = CreateScratchGC(v->display, window->depth); 1291#else 1292 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1293#endif 1294 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1295 1296 /* 1297 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1298 * Patch contributed by Michael Pichler May 15, 1995. 1299 */ 1300#ifdef XFree86Server 1301 b->swapgc = CreateScratchGC(v->display, window->depth); 1302 { 1303 CARD32 v[1]; 1304 v[0] = FALSE; 1305 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1306 } 1307#else 1308 gcvalues.graphics_exposures = False; 1309 b->swapgc = XCreateGC( v->display, window, 1310 GCGraphicsExposures, &gcvalues); 1311#endif 1312 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1313 /* 1314 * Set fill style and tile pixmap once for all for HPCR stuff 1315 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1316 * Initialize whole stuff 1317 * Patch contributed by Jacques Leroy March 8, 1998. 1318 */ 1319 if (v->hpcr_clear_flag && b->buffer!=XIMAGE) { 1320 int i; 1321 for (i=0; i<16; i++) 1322 { 1323 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1324 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1325 } 1326 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1327 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1328 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1329 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1330 } 1331 1332 /* Initialize the row buffer XImage for use in write_color_span() */ 1333#ifdef XFree86Server 1334 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1335 (char *)MALLOC(MAX_WIDTH*4)); 1336#else 1337 b->rowimage = XCreateImage( v->display, 1338 v->visinfo->visual, 1339 v->visinfo->depth, 1340 ZPixmap, 0, /*format, offset*/ 1341 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1342 MAX_WIDTH, 1, /*width, height*/ 1343 32, /*bitmap_pad*/ 1344 0 /*bytes_per_line*/ ); 1345#endif 1346 } 1347 1348 return GL_TRUE; 1349} 1350 1351 1352 1353/* 1354 * Convert an RGBA color to a pixel value. 1355 */ 1356unsigned long 1357xmesa_color_to_pixel( XMesaContext xmesa, GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1358 GLuint pixelFormat) 1359{ 1360 switch (pixelFormat) { 1361 case PF_Index: 1362 return 0; 1363 case PF_Truecolor: 1364 { 1365 unsigned long p; 1366 PACK_TRUECOLOR( p, r, g, b ); 1367 return p; 1368 } 1369 case PF_8A8B8G8R: 1370 return PACK_8A8B8G8R( r, g, b, a ); 1371 case PF_8R8G8B: 1372 /* fall through */ 1373 case PF_8R8G8B24: 1374 return PACK_8R8G8B( r, g, b ); 1375 case PF_5R6G5B: 1376 return PACK_5R6G5B( r, g, b ); 1377 case PF_Dither: 1378 { 1379 DITHER_SETUP; 1380 return DITHER( 1, 0, r, g, b ); 1381 } 1382 case PF_1Bit: 1383 /* 382 = (3*255)/2 */ 1384 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1385 case PF_HPCR: 1386 return DITHER_HPCR(1, 1, r, g, b); 1387 case PF_Lookup: 1388 { 1389 LOOKUP_SETUP; 1390 return LOOKUP( r, g, b ); 1391 } 1392 case PF_Grayscale: 1393 return GRAY_RGB( r, g, b ); 1394 case PF_Dither_True: 1395 /* fall through */ 1396 case PF_Dither_5R6G5B: 1397 { 1398 unsigned long p; 1399 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1400 return p; 1401 } 1402 default: 1403 _mesa_problem(NULL, "Bad pixel format in xmesa_color_to_pixel"); 1404 } 1405 return 0; 1406} 1407 1408 1409#define NUM_VISUAL_TYPES 6 1410 1411/** 1412 * Convert an X visual type to a GLX visual type. 1413 * 1414 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1415 * to be converted. 1416 * \return If \c visualType is a valid X visual type, a GLX visual type will 1417 * be returned. Otherwise \c GLX_NONE will be returned. 1418 * 1419 * \note 1420 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1421 * DRI CVS tree. 1422 */ 1423static GLint 1424xmesa_convert_from_x_visual_type( int visualType ) 1425{ 1426 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1427 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1428 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1429 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1430 }; 1431 1432 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1433 ? glx_visual_types[ visualType ] : GLX_NONE; 1434} 1435 1436 1437/**********************************************************************/ 1438/***** Public Functions *****/ 1439/**********************************************************************/ 1440 1441 1442/* 1443 * Create a new X/Mesa visual. 1444 * Input: display - X11 display 1445 * visinfo - an XVisualInfo pointer 1446 * rgb_flag - GL_TRUE = RGB mode, 1447 * GL_FALSE = color index mode 1448 * alpha_flag - alpha buffer requested? 1449 * db_flag - GL_TRUE = double-buffered, 1450 * GL_FALSE = single buffered 1451 * stereo_flag - stereo visual? 1452 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1453 * GL_FALSE = use an off-screen pixmap for back buffer 1454 * depth_size - requested bits/depth values, or zero 1455 * stencil_size - requested bits/stencil values, or zero 1456 * accum_red_size - requested bits/red accum values, or zero 1457 * accum_green_size - requested bits/green accum values, or zero 1458 * accum_blue_size - requested bits/blue accum values, or zero 1459 * accum_alpha_size - requested bits/alpha accum values, or zero 1460 * num_samples - number of samples/pixel if multisampling, or zero 1461 * level - visual level, usually 0 1462 * visualCaveat - ala the GLX extension, usually GLX_NONE 1463 * Return; a new XMesaVisual or 0 if error. 1464 */ 1465XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1466 XMesaVisualInfo visinfo, 1467 GLboolean rgb_flag, 1468 GLboolean alpha_flag, 1469 GLboolean db_flag, 1470 GLboolean stereo_flag, 1471 GLboolean ximage_flag, 1472 GLint depth_size, 1473 GLint stencil_size, 1474 GLint accum_red_size, 1475 GLint accum_green_size, 1476 GLint accum_blue_size, 1477 GLint accum_alpha_size, 1478 GLint num_samples, 1479 GLint level, 1480 GLint visualCaveat ) 1481{ 1482 char *gamma; 1483 XMesaVisual v; 1484 GLint red_bits, green_bits, blue_bits, alpha_bits; 1485 1486 /* For debugging only */ 1487 if (_mesa_getenv("MESA_XSYNC")) { 1488 /* This makes debugging X easier. 1489 * In your debugger, set a breakpoint on _XError to stop when an 1490 * X protocol error is generated. 1491 */ 1492#ifdef XFree86Server 1493 /* NOT_NEEDED */ 1494#else 1495 XSynchronize( display, 1 ); 1496#endif 1497 } 1498 1499 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1500 if (!v) { 1501 return NULL; 1502 } 1503 1504 /* 1505 * In the X server, NULL is passed in for the display. It will have 1506 * to be set before using this visual. See XMesaSetVisualDisplay() 1507 * below. 1508 */ 1509 v->display = display; 1510 1511 /* Save a copy of the XVisualInfo struct because the user may XFREE() 1512 * the struct but we may need some of the information contained in it 1513 * at a later time. 1514 */ 1515#ifndef XFree86Server 1516 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1517 if(!v->visinfo) { 1518 FREE(v); 1519 return NULL; 1520 } 1521 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1522#endif 1523 1524 /* check for MESA_GAMMA environment variable */ 1525 gamma = _mesa_getenv("MESA_GAMMA"); 1526 if (gamma) { 1527 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1528 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1529 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1530 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1531 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1532 } 1533 else { 1534 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1535 } 1536 1537 v->ximage_flag = ximage_flag; 1538 1539#ifdef XFree86Server 1540 /* We could calculate these values by ourselves. nplanes is either the sum 1541 * of the red, green, and blue bits or the number index bits. 1542 * ColormapEntries is either (1U << index_bits) or 1543 * (1U << max(redBits, greenBits, blueBits)). 1544 */ 1545 v->nplanes = visinfo->nplanes; 1546 v->ColormapEntries = visinfo->ColormapEntries; 1547 1548 v->mesa_visual.redMask = visinfo->redMask; 1549 v->mesa_visual.greenMask = visinfo->greenMask; 1550 v->mesa_visual.blueMask = visinfo->blueMask; 1551 v->mesa_visual.visualID = visinfo->vid; 1552 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1553#else 1554 v->mesa_visual.redMask = visinfo->red_mask; 1555 v->mesa_visual.greenMask = visinfo->green_mask; 1556 v->mesa_visual.blueMask = visinfo->blue_mask; 1557 v->mesa_visual.visualID = visinfo->visualid; 1558 v->mesa_visual.screen = visinfo->screen; 1559#endif 1560 1561#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1562 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1563#else 1564 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1565#endif 1566 1567 v->mesa_visual.visualRating = visualCaveat; 1568 1569 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1570 1571 { 1572 const int xclass = v->mesa_visual.visualType; 1573 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1574 red_bits = bitcount(GET_REDMASK(v)); 1575 green_bits = bitcount(GET_GREENMASK(v)); 1576 blue_bits = bitcount(GET_BLUEMASK(v)); 1577 alpha_bits = 0; 1578 } 1579 else { 1580 /* this is an approximation */ 1581 int depth; 1582 depth = GET_VISUAL_DEPTH(v); 1583 red_bits = depth / 3; 1584 depth -= red_bits; 1585 green_bits = depth / 2; 1586 depth -= green_bits; 1587 blue_bits = depth; 1588 alpha_bits = 0; 1589 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1590 } 1591 } 1592 1593 if (alpha_flag && alpha_bits == 0) 1594 alpha_bits = 8; 1595 1596 _mesa_initialize_visual( &v->mesa_visual, 1597 rgb_flag, db_flag, stereo_flag, 1598 red_bits, green_bits, 1599 blue_bits, alpha_bits, 1600 v->mesa_visual.indexBits, 1601 depth_size, 1602 stencil_size, 1603 accum_red_size, accum_green_size, 1604 accum_blue_size, accum_alpha_size, 1605 0 ); 1606 1607 v->mesa_visual.level = level; 1608 return v; 1609} 1610 1611 1612void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1613{ 1614 v->display = dpy; 1615} 1616 1617 1618void XMesaDestroyVisual( XMesaVisual v ) 1619{ 1620#ifndef XFree86Server 1621 FREE(v->visinfo); 1622#endif 1623 FREE(v); 1624} 1625 1626 1627 1628/** 1629 * Create a new XMesaContext. 1630 * \param v the XMesaVisual 1631 * \param share_list another XMesaContext with which to share display 1632 * lists or NULL if no sharing is wanted. 1633 * \return an XMesaContext or NULL if error. 1634 */ 1635XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1636{ 1637 static GLboolean firstTime = GL_TRUE; 1638 XMesaContext c; 1639 GLcontext *mesaCtx; 1640 struct dd_function_table functions; 1641 TNLcontext *tnl; 1642 1643 if (firstTime) { 1644 _glthread_INIT_MUTEX(_xmesa_lock); 1645 firstTime = GL_FALSE; 1646 } 1647 1648 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1649 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1650 if (!c) 1651 return NULL; 1652 1653 mesaCtx = &(c->mesa); 1654 1655 /* initialize with default driver functions, then plug in XMesa funcs */ 1656 _mesa_init_driver_functions(&functions); 1657 xmesa_init_driver_functions(v, &functions); 1658 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1659 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1660 &functions, (void *) c)) { 1661 FREE(c); 1662 return NULL; 1663 } 1664 1665 _mesa_enable_sw_extensions(mesaCtx); 1666 _mesa_enable_1_3_extensions(mesaCtx); 1667 _mesa_enable_1_4_extensions(mesaCtx); 1668 _mesa_enable_1_5_extensions(mesaCtx); 1669 1670 /* finish up xmesa context initializations */ 1671 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1672 c->xm_visual = v; 1673 c->xm_draw_buffer = NULL; /* set later by XMesaMakeCurrent */ 1674 c->xm_read_buffer = NULL; /* set later by XMesaMakeCurrent */ 1675 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1676 c->display = v->display; 1677 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1678 1679 /* Initialize the software rasterizer and helper modules. 1680 */ 1681 _swrast_CreateContext( mesaCtx ); 1682 _ac_CreateContext( mesaCtx ); 1683 _tnl_CreateContext( mesaCtx ); 1684 _swsetup_CreateContext( mesaCtx ); 1685 1686 /* tnl setup */ 1687 tnl = TNL_CONTEXT(mesaCtx); 1688 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1689 /* swrast setup */ 1690 xmesa_register_swrast_functions( mesaCtx ); 1691 _swsetup_Wakeup(mesaCtx); 1692 1693 return c; 1694} 1695 1696 1697 1698void XMesaDestroyContext( XMesaContext c ) 1699{ 1700 GLcontext *mesaCtx = &c->mesa; 1701#ifdef FX 1702 if (c->xm_draw_buffer && c->xm_buffer->FXctx) 1703 fxMesaDestroyContext(c->xm_draw_buffer->FXctx); 1704#endif 1705 _swsetup_DestroyContext( mesaCtx ); 1706 _swrast_DestroyContext( mesaCtx ); 1707 _tnl_DestroyContext( mesaCtx ); 1708 _ac_DestroyContext( mesaCtx ); 1709 _mesa_free_context_data( mesaCtx ); 1710 _mesa_free( c ); 1711} 1712 1713 1714 1715/* 1716 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1717 * Create a new XMesaBuffer from an X window. 1718 * Input: v - the XMesaVisual 1719 * w - the window 1720 * c - the context 1721 * Return: new XMesaBuffer or NULL if error 1722 */ 1723XMesaBuffer XMesaCreateWindowBuffer2( XMesaVisual v, XMesaWindow w, 1724 XMesaContext c ) 1725{ 1726#ifndef XFree86Server 1727 XWindowAttributes attr; 1728#endif 1729#ifdef FX 1730 char *fxEnvVar; 1731#endif 1732 int client = 0; 1733 1734 XMesaBuffer b = alloc_xmesa_buffer(); 1735 if (!b) { 1736 return NULL; 1737 } 1738 1739 (void) c; 1740 1741#ifdef XFree86Server 1742 client = CLIENT_ID(((XMesaDrawable)w)->id); 1743#endif 1744 1745 assert(v); 1746 1747#ifdef XFree86Server 1748 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1749#else 1750 XGetWindowAttributes( v->display, w, &attr ); 1751 1752 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1753#endif 1754 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n"); 1755 return NULL; 1756 } 1757 1758 b->xm_visual = v; 1759 b->type = WINDOW; 1760 b->display = v->display; 1761#ifdef XFree86Server 1762 b->cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1763#else 1764 if (attr.colormap) { 1765 b->cmap = attr.colormap; 1766 } 1767 else { 1768 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1769 /* this is weird, a window w/out a colormap!? */ 1770 /* OK, let's just allocate a new one and hope for the best */ 1771 b->cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1772 } 1773#endif 1774 1775 /* determine back buffer implementation */ 1776 if (v->mesa_visual.doubleBufferMode) { 1777 if (v->ximage_flag) { 1778 b->db_state = BACK_XIMAGE; 1779 } 1780 else { 1781 b->db_state = BACK_PIXMAP; 1782 } 1783 } 1784 else { 1785 b->db_state = 0; 1786 } 1787 1788 _mesa_initialize_framebuffer(&b->mesa_buffer, 1789 &v->mesa_visual, 1790 v->mesa_visual.depthBits > 0, 1791 v->mesa_visual.stencilBits > 0, 1792 v->mesa_visual.accumRedBits > 0, 1793 v->mesa_visual.alphaBits > 0 ); 1794 1795 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1796 (XMesaDrawable)w, b->cmap )) { 1797 free_xmesa_buffer(client, b); 1798 return NULL; 1799 } 1800 1801#ifdef FX 1802 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1803 if (fxEnvVar) { 1804 if (fxEnvVar[0]!='d') { 1805 int attribs[100]; 1806 int numAttribs = 0; 1807 int hw; 1808 if (v->mesa_visual.depthBits > 0) { 1809 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1810 attribs[numAttribs++] = v->mesa_visual.depthBits; 1811 } 1812 if (v->mesa_visual.doubleBufferMode) { 1813 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1814 } 1815 if (v->mesa_visual.accumRedBits > 0) { 1816 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1817 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1818 } 1819 if (v->mesa_visual.stencilBits > 0) { 1820 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1821 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1822 } 1823 if (v->mesa_visual.alphaBits > 0) { 1824 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1825 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1826 } 1827 if (1) { 1828 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1829 attribs[numAttribs++] = (int) &(c->mesa); 1830 } 1831 attribs[numAttribs++] = FXMESA_NONE; 1832 1833 /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ 1834 if ((hw = fxMesaSelectCurrentBoard(0))==GR_SSTTYPE_VOODOO) { 1835 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1836 if ((v->undithered_pf!=PF_Index) && (b->backimage)) { 1837 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1838 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1839 b->FXwindowHack = b->FXctx ? GL_TRUE : GL_FALSE; 1840 else 1841 b->FXwindowHack = GL_FALSE; 1842 } 1843 } 1844 else { 1845 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1846 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1847 GR_REFRESH_75Hz, attribs); 1848 else 1849 b->FXctx = fxMesaCreateBestContext(0, b->width, b->height, attribs); 1850 b->FXisHackUsable = GL_FALSE; 1851 b->FXwindowHack = GL_FALSE; 1852 } 1853 /* 1854 fprintf(stderr, 1855 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1856 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack); 1857 */ 1858 } 1859 } 1860 else { 1861 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1862 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1863 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1864 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1865 } 1866#endif 1867 1868 return b; 1869} 1870 1871 1872XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, XMesaWindow w ) 1873{ 1874 return XMesaCreateWindowBuffer2( v, w, NULL ); 1875} 1876 1877 1878/** 1879 * Create a new XMesaBuffer from an X pixmap. 1880 * 1881 * \param v the XMesaVisual 1882 * \param p the pixmap 1883 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1884 * \c GLX_DIRECT_COLOR visual for the pixmap 1885 * \returns new XMesaBuffer or NULL if error 1886 */ 1887XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v, 1888 XMesaPixmap p, XMesaColormap cmap ) 1889{ 1890 int client = 0; 1891 XMesaBuffer b = alloc_xmesa_buffer(); 1892 if (!b) { 1893 return NULL; 1894 } 1895 1896 1897#ifdef XFree86Server 1898 client = CLIENT_ID(((XMesaDrawable)p)->id); 1899#endif 1900 1901 assert(v); 1902 1903 b->xm_visual = v; 1904 b->type = PIXMAP; 1905 b->display = v->display; 1906 b->cmap = cmap; 1907 1908 /* determine back buffer implementation */ 1909 if (v->mesa_visual.doubleBufferMode) { 1910 if (v->ximage_flag) { 1911 b->db_state = BACK_XIMAGE; 1912 } 1913 else { 1914 b->db_state = BACK_PIXMAP; 1915 } 1916 } 1917 else { 1918 b->db_state = 0; 1919 } 1920 1921 _mesa_initialize_framebuffer(&b->mesa_buffer, 1922 &v->mesa_visual, 1923 v->mesa_visual.depthBits > 0, 1924 v->mesa_visual.stencilBits > 0, 1925 v->mesa_visual.accumRedBits + 1926 v->mesa_visual.accumGreenBits + 1927 v->mesa_visual.accumBlueBits > 0, 1928 v->mesa_visual.alphaBits > 0 ); 1929 1930 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1931 (XMesaDrawable)p, cmap)) { 1932 free_xmesa_buffer(client, b); 1933 return NULL; 1934 } 1935 1936 return b; 1937} 1938 1939 1940 1941XMesaBuffer XMesaCreatePBuffer( XMesaVisual v, XMesaColormap cmap, 1942 unsigned int width, unsigned int height ) 1943{ 1944#ifdef XFree86Server 1945 return 0; 1946#else 1947 int client = 0; 1948 XMesaWindow root; 1949 XMesaDrawable drawable; /* X Pixmap Drawable */ 1950 XMesaBuffer b = alloc_xmesa_buffer(); 1951 if (!b) { 1952 return NULL; 1953 } 1954 1955 b->xm_visual = v; 1956 b->type = PBUFFER; 1957 b->display = v->display; 1958 b->cmap = cmap; 1959 1960 /* allocate pixmap for front buffer */ 1961 root = RootWindow( v->display, v->visinfo->screen ); 1962 drawable = XCreatePixmap( v->display, root, width, height, v->visinfo->depth ); 1963 1964 /* determine back buffer implementation */ 1965 if (v->mesa_visual.doubleBufferMode) { 1966 if (v->ximage_flag) { 1967 b->db_state = BACK_XIMAGE; 1968 } 1969 else { 1970 b->db_state = BACK_PIXMAP; 1971 } 1972 } 1973 else { 1974 b->db_state = 0; 1975 } 1976 1977 _mesa_initialize_framebuffer(&b->mesa_buffer, 1978 &v->mesa_visual, 1979 v->mesa_visual.depthBits > 0, 1980 v->mesa_visual.stencilBits > 0, 1981 v->mesa_visual.accumRedBits + 1982 v->mesa_visual.accumGreenBits + 1983 v->mesa_visual.accumBlueBits > 0, 1984 v->mesa_visual.alphaBits > 0 ); 1985 1986 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1987 drawable, cmap)) { 1988 free_xmesa_buffer(client, b); 1989 return NULL; 1990 } 1991 1992 return b; 1993#endif 1994} 1995 1996 1997 1998/* 1999 * Deallocate an XMesaBuffer structure and all related info. 2000 */ 2001void XMesaDestroyBuffer( XMesaBuffer b ) 2002{ 2003 int client = 0; 2004 2005#ifdef XFree86Server 2006 if (b->frontbuffer) 2007 client = CLIENT_ID(b->frontbuffer->id); 2008#endif 2009 2010 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 2011 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 2012 if (b->swapgc) XMesaFreeGC( b->xm_visual->display, b->swapgc ); 2013 2014 if (b->backimage) { 2015#if defined(USE_XSHM) && !defined(XFree86Server) 2016 if (b->shm) { 2017 XShmDetach( b->xm_visual->display, &b->shminfo ); 2018 XDestroyImage( b->backimage ); 2019 shmdt( b->shminfo.shmaddr ); 2020 } 2021 else 2022#endif 2023 XMesaDestroyImage( b->backimage ); 2024 } 2025 if (b->backpixmap) { 2026 XMesaFreePixmap( b->xm_visual->display, b->backpixmap ); 2027 if (b->xm_visual->hpcr_clear_flag) { 2028 XMesaFreePixmap( b->xm_visual->display, 2029 b->xm_visual->hpcr_clear_pixmap ); 2030 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 2031 } 2032 } 2033 if (b->rowimage) { 2034 FREE( b->rowimage->data ); 2035 b->rowimage->data = NULL; 2036 XMesaDestroyImage( b->rowimage ); 2037 } 2038 2039 free_xmesa_buffer(client, b); 2040} 2041 2042 2043 2044/* 2045 * Bind buffer b to context c and make c the current rendering context. 2046 */ 2047GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2048{ 2049 return XMesaMakeCurrent2( c, b, b ); 2050} 2051 2052 2053/* 2054 * Bind buffer b to context c and make c the current rendering context. 2055 */ 2056GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2057 XMesaBuffer readBuffer ) 2058{ 2059 if (c) { 2060 if (!drawBuffer || !readBuffer) 2061 return GL_FALSE; /* must specify buffers! */ 2062 2063#ifdef FX 2064 if (drawBuffer->FXctx) { 2065 fxMesaMakeCurrent(drawBuffer->FXctx); 2066 2067 c->xm_draw_buffer = drawBuffer; 2068 c->xm_read_buffer = readBuffer; 2069 c->xm_buffer = drawBuffer; 2070 2071 return GL_TRUE; 2072 } 2073#endif 2074 if (&(c->mesa) == _mesa_get_current_context() 2075 && c->xm_draw_buffer == drawBuffer 2076 && c->xm_read_buffer == readBuffer 2077 && c->xm_draw_buffer->wasCurrent) { 2078 /* same context and buffer, do nothing */ 2079 return GL_TRUE; 2080 } 2081 2082 c->xm_draw_buffer = drawBuffer; 2083 c->xm_read_buffer = readBuffer; 2084 c->xm_buffer = drawBuffer; 2085 2086 _mesa_make_current2(&(c->mesa), 2087 &drawBuffer->mesa_buffer, 2088 &readBuffer->mesa_buffer); 2089 2090 if (c->mesa.Viewport.Width == 0) { 2091 /* initialize viewport to window size */ 2092 _mesa_Viewport( 0, 0, drawBuffer->width, drawBuffer->height ); 2093 c->mesa.Scissor.Width = drawBuffer->width; 2094 c->mesa.Scissor.Height = drawBuffer->height; 2095 } 2096 2097 if (c->xm_visual->mesa_visual.rgbMode) { 2098 /* 2099 * Must recompute and set these pixel values because colormap 2100 * can be different for different windows. 2101 */ 2102 c->clearpixel = xmesa_color_to_pixel( c, 2103 c->clearcolor[0], 2104 c->clearcolor[1], 2105 c->clearcolor[2], 2106 c->clearcolor[3], 2107 c->xm_visual->undithered_pf); 2108 XMesaSetForeground(c->display, c->xm_draw_buffer->cleargc, c->clearpixel); 2109 } 2110 2111 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2112 c->xm_draw_buffer->wasCurrent = GL_TRUE; 2113 } 2114 else { 2115 /* Detach */ 2116 _mesa_make_current2( NULL, NULL, NULL ); 2117 } 2118 return GL_TRUE; 2119} 2120 2121 2122/* 2123 * Unbind the context c from its buffer. 2124 */ 2125GLboolean XMesaUnbindContext( XMesaContext c ) 2126{ 2127 /* A no-op for XFree86 integration purposes */ 2128 return GL_TRUE; 2129} 2130 2131 2132XMesaContext XMesaGetCurrentContext( void ) 2133{ 2134 GET_CURRENT_CONTEXT(ctx); 2135 if (ctx) { 2136 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2137 return xmesa; 2138 } 2139 else { 2140 return 0; 2141 } 2142} 2143 2144 2145XMesaBuffer XMesaGetCurrentBuffer( void ) 2146{ 2147 GET_CURRENT_CONTEXT(ctx); 2148 if (ctx) { 2149 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2150 return xmesa->xm_draw_buffer; 2151 } 2152 else { 2153 return 0; 2154 } 2155} 2156 2157 2158/* New in Mesa 3.1 */ 2159XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2160{ 2161 GET_CURRENT_CONTEXT(ctx); 2162 if (ctx) { 2163 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2164 return xmesa->xm_read_buffer; 2165 } 2166 else { 2167 return 0; 2168 } 2169} 2170 2171 2172GLboolean XMesaForceCurrent(XMesaContext c) 2173{ 2174 if (c) { 2175 if (&(c->mesa) != _mesa_get_current_context()) { 2176 _mesa_make_current(&(c->mesa), &c->xm_draw_buffer->mesa_buffer); 2177 } 2178 } 2179 else { 2180 _mesa_make_current(NULL, NULL); 2181 } 2182 return GL_TRUE; 2183} 2184 2185 2186GLboolean XMesaLoseCurrent(XMesaContext c) 2187{ 2188 (void) c; 2189 _mesa_make_current(NULL, NULL); 2190 return GL_TRUE; 2191} 2192 2193 2194/* 2195 * Switch 3Dfx support hack between window and full-screen mode. 2196 */ 2197GLboolean XMesaSetFXmode( GLint mode ) 2198{ 2199#ifdef FX 2200 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2201 if (fx && fx[0] != 'd') { 2202 GET_CURRENT_CONTEXT(ctx); 2203 GrHwConfiguration hw; 2204 if (!FX_grSstQueryHardware(&hw)) { 2205 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2206 return GL_FALSE; 2207 } 2208 if (hw.num_sst < 1) { 2209 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2210 return GL_FALSE; 2211 } 2212 if (ctx) { 2213 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2214 if (mode == XMESA_FX_WINDOW) { 2215 if (xmesa->xm_draw_buffer->FXisHackUsable) { 2216 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2217 xmesa->xm_draw_buffer->FXwindowHack = GL_TRUE; 2218 return GL_TRUE; 2219 } 2220 } 2221 else if (mode == XMESA_FX_FULLSCREEN) { 2222 FX_grSstControl(GR_CONTROL_ACTIVATE); 2223 xmesa->xm_draw_buffer->FXwindowHack = GL_FALSE; 2224 return GL_TRUE; 2225 } 2226 else { 2227 /* Error: Bad mode value */ 2228 } 2229 } 2230 } 2231 /*fprintf(stderr, "fallthrough\n");*/ 2232#else 2233 (void) mode; 2234#endif 2235 return GL_FALSE; 2236} 2237 2238 2239 2240#ifdef FX 2241/* 2242 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2243 */ 2244static void FXgetImage( XMesaBuffer b ) 2245{ 2246 GET_CURRENT_CONTEXT(ctx); 2247 static unsigned short pixbuf[MAX_WIDTH]; 2248 GLuint x, y; 2249 int xpos, ypos; 2250 XMesaWindow root; 2251 unsigned int bw, depth, width, height; 2252 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2253 2254#ifdef XFree86Server 2255 x = b->frontbuffer->x; 2256 y = b->frontbuffer->y; 2257 width = b->frontbuffer->width; 2258 height = b->frontbuffer->height; 2259 depth = b->frontbuffer->depth; 2260#else 2261 XGetGeometry( b->xm_visual->display, b->frontbuffer, 2262 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2263#endif 2264 if (b->width != width || b->height != height) { 2265 b->width = MIN2((int)width, b->FXctx->width); 2266 b->height = MIN2((int)height, b->FXctx->height); 2267 if (b->width & 1) 2268 b->width--; /* prevent odd width */ 2269 xmesa_alloc_back_buffer( b ); 2270 } 2271 2272 /* [dBorca] 2273 * not needed for Voodoo2 anymore. 2274 * should we test fxMesa->bgrOrder? 2275 */ 2276 /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */ 2277 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2278 /* Special case: 16bpp RGB */ 2279 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2280 0, b->FXctx->height - b->height, /*pos*/ 2281 b->width, b->height, /* size */ 2282 b->width * sizeof(GLushort), /* stride */ 2283 b->backimage->data); /* dest buffer */ 2284 } 2285 else if (b->xm_visual->dithered_pf==PF_Dither 2286 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2287 /* Special case: 8bpp RGB */ 2288 for (y=0;y<b->height;y++) { 2289 GLubyte *ptr = (GLubyte*) b->backimage->data 2290 + b->backimage->bytes_per_line * y; 2291 XDITHER_SETUP(y); 2292 2293 /* read row from 3Dfx frame buffer */ 2294 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2295 0, b->FXctx->height-(b->height-y), 2296 b->width, 1, 2297 0, 2298 pixbuf ); 2299 2300 /* write to XImage back buffer */ 2301 for (x=0;x<b->width;x++) { 2302 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2303 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2304 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2305 *ptr++ = XDITHER( x, r, g, b); 2306 } 2307 } 2308 } 2309 else { 2310 /* General case: slow! */ 2311 for (y=0;y<b->height;y++) { 2312 /* read row from 3Dfx frame buffer */ 2313 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2314 0, b->FXctx->height-(b->height-y), 2315 b->width, 1, 2316 0, 2317 pixbuf ); 2318 2319 /* write to XImage back buffer */ 2320 for (x=0;x<b->width;x++) { 2321 XMesaPutPixel(b->backimage,x,y, 2322 xmesa_color_to_pixel(xmesa, 2323 (pixbuf[x] & 0xf800) >> 8, 2324 (pixbuf[x] & 0x07e0) >> 3, 2325 (pixbuf[x] & 0x001f) << 3, 2326 0xff, 2327 b->xm_visual->undithered_pf)); 2328 } 2329 } 2330 } 2331 /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */ 2332} 2333#endif 2334 2335 2336/* 2337 * Copy the back buffer to the front buffer. If there's no back buffer 2338 * this is a no-op. 2339 */ 2340void XMesaSwapBuffers( XMesaBuffer b ) 2341{ 2342 GET_CURRENT_CONTEXT(ctx); 2343 2344 /* If we're swapping the buffer associated with the current context 2345 * we have to flush any pending rendering commands first. 2346 */ 2347 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2348 _mesa_notifySwapBuffers(ctx); 2349 2350 if (b->db_state) { 2351#ifdef FX 2352 if (b->FXctx) { 2353 fxMesaSwapBuffers(); 2354 2355 if (b->FXwindowHack) 2356 FXgetImage(b); 2357 else 2358 return; 2359 } 2360#endif 2361 if (b->backimage) { 2362 /* Copy Ximage from host's memory to server's window */ 2363#if defined(USE_XSHM) && !defined(XFree86Server) 2364 if (b->shm) { 2365 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2366 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2367 b->swapgc, 2368 b->backimage, 0, 0, 2369 0, 0, b->width, b->height, False ); 2370 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2371 } 2372 else 2373#endif 2374 { 2375 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2376 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2377 b->swapgc, 2378 b->backimage, 0, 0, 2379 0, 0, b->width, b->height ); 2380 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2381 } 2382 } 2383 else { 2384 /* Copy pixmap to window on server */ 2385 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2386 XMesaCopyArea( b->xm_visual->display, 2387 b->backpixmap, /* source drawable */ 2388 b->frontbuffer, /* dest. drawable */ 2389 b->swapgc, 2390 0, 0, b->width, b->height, /* source region */ 2391 0, 0 /* dest region */ 2392 ); 2393 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2394 } 2395 } 2396#if !defined(XFree86Server) 2397 XSync( b->xm_visual->display, False ); 2398#endif 2399} 2400 2401 2402 2403/* 2404 * Copy sub-region of back buffer to front buffer 2405 */ 2406void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2407{ 2408 GET_CURRENT_CONTEXT(ctx); 2409 2410 /* If we're swapping the buffer associated with the current context 2411 * we have to flush any pending rendering commands first. 2412 */ 2413 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2414 _mesa_notifySwapBuffers(ctx); 2415 2416 if (b->db_state) { 2417 int yTop = b->height - y - height; 2418#ifdef FX 2419 if (b->FXctx) { 2420 fxMesaSwapBuffers(); 2421 if (b->FXwindowHack) 2422 FXgetImage(b); 2423 else 2424 return; 2425 } 2426#endif 2427 if (b->backimage) { 2428 /* Copy Ximage from host's memory to server's window */ 2429#if defined(USE_XSHM) && !defined(XFree86Server) 2430 if (b->shm) { 2431 /* XXX assuming width and height aren't too large! */ 2432 XShmPutImage( b->xm_visual->display, b->frontbuffer, 2433 b->swapgc, 2434 b->backimage, x, yTop, 2435 x, yTop, width, height, False ); 2436 /* wait for finished event??? */ 2437 } 2438 else 2439#endif 2440 { 2441 /* XXX assuming width and height aren't too large! */ 2442 XMesaPutImage( b->xm_visual->display, b->frontbuffer, 2443 b->swapgc, 2444 b->backimage, x, yTop, 2445 x, yTop, width, height ); 2446 } 2447 } 2448 else { 2449 /* Copy pixmap to window on server */ 2450 XMesaCopyArea( b->xm_visual->display, 2451 b->backpixmap, /* source drawable */ 2452 b->frontbuffer, /* dest. drawable */ 2453 b->swapgc, 2454 x, yTop, width, height, /* source region */ 2455 x, yTop /* dest region */ 2456 ); 2457 } 2458 } 2459} 2460 2461 2462/* 2463 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2464 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2465 * back buffer directly. 2466 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2467 * ximage - pointer to back buffer's XImage, or NULL 2468 * Return: GL_TRUE = context is double buffered 2469 * GL_FALSE = context is single buffered 2470 */ 2471GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2472 XMesaPixmap *pixmap, 2473 XMesaImage **ximage ) 2474{ 2475 if (b->db_state) { 2476 if (pixmap) *pixmap = b->backpixmap; 2477 if (ximage) *ximage = b->backimage; 2478 return GL_TRUE; 2479 } 2480 else { 2481 *pixmap = 0; 2482 *ximage = NULL; 2483 return GL_FALSE; 2484 } 2485} 2486 2487 2488/* 2489 * Return the depth buffer associated with an XMesaBuffer. 2490 * Input: b - the XMesa buffer handle 2491 * Output: width, height - size of buffer in pixels 2492 * bytesPerValue - bytes per depth value (2 or 4) 2493 * buffer - pointer to depth buffer values 2494 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2495 */ 2496GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2497 GLint *bytesPerValue, void **buffer ) 2498{ 2499 if (!b->mesa_buffer.DepthBuffer) { 2500 *width = 0; 2501 *height = 0; 2502 *bytesPerValue = 0; 2503 *buffer = 0; 2504 return GL_FALSE; 2505 } 2506 else { 2507 *width = b->mesa_buffer.Width; 2508 *height = b->mesa_buffer.Height; 2509 *bytesPerValue = sizeof(GLdepth); 2510 *buffer = b->mesa_buffer.DepthBuffer; 2511 return GL_TRUE; 2512 } 2513} 2514 2515 2516void XMesaFlush( XMesaContext c ) 2517{ 2518 if (c && c->xm_visual) { 2519#ifdef XFree86Server 2520 /* NOT_NEEDED */ 2521#else 2522 XSync( c->xm_visual->display, False ); 2523#endif 2524 } 2525} 2526 2527 2528 2529const char *XMesaGetString( XMesaContext c, int name ) 2530{ 2531 (void) c; 2532 if (name==XMESA_VERSION) { 2533 return "5.0"; 2534 } 2535 else if (name==XMESA_EXTENSIONS) { 2536 return ""; 2537 } 2538 else { 2539 return NULL; 2540 } 2541} 2542 2543 2544 2545XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2546{ 2547 XMesaBuffer b; 2548 for (b=XMesaBufferList; b; b=b->Next) { 2549 if (b->frontbuffer==d && b->display==dpy) { 2550 return b; 2551 } 2552 } 2553 return NULL; 2554} 2555 2556 2557 2558/* 2559 * Look for XMesaBuffers whose X window has been destroyed. 2560 * Deallocate any such XMesaBuffers. 2561 */ 2562void XMesaGarbageCollect( void ) 2563{ 2564 XMesaBuffer b, next; 2565 for (b=XMesaBufferList; b; b=next) { 2566 next = b->Next; 2567 if (b->display && b->frontbuffer && b->type == WINDOW) { 2568#ifdef XFree86Server 2569 /* NOT_NEEDED */ 2570#else 2571 XSync(b->display, False); 2572 if (!window_exists( b->display, b->frontbuffer )) { 2573 /* found a dead window, free the ancillary info */ 2574 XMesaDestroyBuffer( b ); 2575 } 2576#endif 2577 } 2578 } 2579} 2580 2581 2582void XMesaReset( void ) 2583{ 2584 while (XMesaBufferList) 2585 XMesaDestroyBuffer(XMesaBufferList); 2586 2587 XMesaBufferList = NULL; 2588} 2589 2590 2591unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2592 GLfloat red, GLfloat green, 2593 GLfloat blue, GLfloat alpha ) 2594{ 2595 GLint r = (GLint) (red * 255.0F); 2596 GLint g = (GLint) (green * 255.0F); 2597 GLint b = (GLint) (blue * 255.0F); 2598 GLint a = (GLint) (alpha * 255.0F); 2599 2600 (void) DitherValues; /* silence warning */ 2601 2602 switch (xmesa->pixelformat) { 2603 case PF_Index: 2604 return 0; 2605 case PF_Truecolor: 2606 { 2607 unsigned long p; 2608 PACK_TRUECOLOR( p, r, g, b ); 2609 return p; 2610 } 2611 case PF_8A8B8G8R: 2612 return PACK_8A8B8G8R( r, g, b, a ); 2613 case PF_8R8G8B: 2614 return PACK_8R8G8B( r, g, b ); 2615 case PF_5R6G5B: 2616 return PACK_5R6G5B( r, g, b ); 2617 case PF_Dither: 2618 { 2619 DITHER_SETUP; 2620 return DITHER( x, y, r, g, b ); 2621 } 2622 case PF_1Bit: 2623 /* 382 = (3*255)/2 */ 2624 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2625 case PF_HPCR: 2626 return DITHER_HPCR(x, y, r, g, b); 2627 case PF_Lookup: 2628 { 2629 LOOKUP_SETUP; 2630 return LOOKUP( r, g, b ); 2631 } 2632 case PF_Grayscale: 2633 return GRAY_RGB( r, g, b ); 2634 case PF_Dither_5R6G5B: 2635 /* fall through */ 2636 case PF_Dither_True: 2637 { 2638 unsigned long p; 2639 PACK_TRUEDITHER(p, x, y, r, g, b); 2640 return p; 2641 } 2642 default: 2643 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2644 } 2645 return 0; 2646} 2647 2648 2649/* 2650 * This is typically called when the window size changes and we need 2651 * to reallocate the buffer's back/depth/stencil/accum buffers. 2652 */ 2653void XMesaResizeBuffers( XMesaBuffer b ) 2654{ 2655 xmesa_resize_buffers( &(b->mesa_buffer) ); 2656 2657} 2658 2659