xm_api.c revision 692147ebf7f09d56a7de1659de2449478da4d1ba
1/* 2 * Mesa 3-D graphics library 3 * Version: 6.3 4 * 5 * Copyright (C) 1999-2005 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 "framebuffer.h" 69#include "glthread.h" 70#include "imports.h" 71#include "matrix.h" 72#include "mtypes.h" 73#include "macros.h" 74#include "renderbuffer.h" 75#include "texformat.h" 76#include "texobj.h" 77#include "texstore.h" 78#include "swrast/swrast.h" 79#include "swrast_setup/swrast_setup.h" 80#include "array_cache/acache.h" 81#include "tnl/tnl.h" 82#include "tnl/t_context.h" 83#include "tnl/t_pipeline.h" 84#include "drivers/common/driverfuncs.h" 85 86#ifdef XFree86Server 87#include <GL/glxtokens.h> 88#endif 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 * Return the host's byte order as LSBFirst or MSBFirst ala X. 166 */ 167#ifndef XFree86Server 168static int host_byte_order( void ) 169{ 170 int i = 1; 171 char *cptr = (char *) &i; 172 return (*cptr==1) ? LSBFirst : MSBFirst; 173} 174#endif 175 176 177/* 178 * Error handling. 179 */ 180#ifndef XFree86Server 181static volatile int mesaXErrorFlag = 0; 182 183static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event ) 184{ 185 (void) dpy; 186 (void) event; 187 mesaXErrorFlag = 1; 188 return 0; 189} 190#endif 191 192 193/* 194 * Check if the X Shared Memory extension is available. 195 * Return: 0 = not available 196 * 1 = shared XImage support available 197 * 2 = shared Pixmap support available also 198 */ 199static int check_for_xshm( XMesaDisplay *display ) 200{ 201#if defined(XFree86Server) 202 return 0; 203#elif defined(USE_XSHM) 204 int major, minor, ignore; 205 Bool pixmaps; 206 207 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 208 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 209 return (pixmaps==True) ? 2 : 1; 210 } 211 else { 212 return 0; 213 } 214 } 215 else { 216 return 0; 217 } 218#else 219 /* No XSHM support */ 220 return 0; 221#endif 222} 223 224 225/* 226 * Apply gamma correction to an intensity value in [0..max]. Return the 227 * new intensity value. 228 */ 229static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) 230{ 231 if (gamma == 1.0) { 232 return value; 233 } 234 else { 235 double x = (double) value / (double) max; 236 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 237 } 238} 239 240 241 242/* 243 * Return the true number of bits per pixel for XImages. 244 * For example, if we request a 24-bit deep visual we may actually need/get 245 * 32bpp XImages. This function returns the appropriate bpp. 246 * Input: dpy - the X display 247 * visinfo - desribes the visual to be used for XImages 248 * Return: true number of bits per pixel for XImages 249 */ 250#ifdef XFree86Server 251 252static int bits_per_pixel( XMesaVisual xmv ) 253{ 254 const int depth = xmv->nplanes; 255 int i; 256 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 257 if (screenInfo.formats[i].depth == depth) 258 return screenInfo.formats[i].bitsPerPixel; 259 } 260 return depth; /* should never get here, but this should be safe */ 261} 262 263#else 264 265static int bits_per_pixel( XMesaVisual xmv ) 266{ 267 XMesaDisplay *dpy = xmv->display; 268 XMesaVisualInfo visinfo = xmv->visinfo; 269 XMesaImage *img; 270 int bitsPerPixel; 271 /* Create a temporary XImage */ 272 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 273 ZPixmap, 0, /*format, offset*/ 274 (char*) MALLOC(8), /*data*/ 275 1, 1, /*width, height*/ 276 32, /*bitmap_pad*/ 277 0 /*bytes_per_line*/ 278 ); 279 assert(img); 280 /* grab the bits/pixel value */ 281 bitsPerPixel = img->bits_per_pixel; 282 /* free the XImage */ 283 _mesa_free( img->data ); 284 img->data = NULL; 285 XMesaDestroyImage( img ); 286 return bitsPerPixel; 287} 288#endif 289 290 291 292/* 293 * Determine if a given X window ID is valid (window exists). 294 * Do this by calling XGetWindowAttributes() for the window and 295 * checking if we catch an X error. 296 * Input: dpy - the display 297 * win - the window to check for existance 298 * Return: GL_TRUE - window exists 299 * GL_FALSE - window doesn't exist 300 */ 301#ifndef XFree86Server 302static GLboolean WindowExistsFlag; 303 304static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 305{ 306 (void) dpy; 307 if (xerr->error_code == BadWindow) { 308 WindowExistsFlag = GL_FALSE; 309 } 310 return 0; 311} 312 313static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 314{ 315 XWindowAttributes wa; 316 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 317 WindowExistsFlag = GL_TRUE; 318 old_handler = XSetErrorHandler(window_exists_err_handler); 319 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 320 XSetErrorHandler(old_handler); 321 return WindowExistsFlag; 322} 323#endif 324 325 326 327/**********************************************************************/ 328/***** Linked list of XMesaBuffers *****/ 329/**********************************************************************/ 330 331static XMesaBuffer XMesaBufferList = NULL; 332 333 334/** 335 * Allocate a new XMesaBuffer, initialize basic fields and add to 336 * the list of all buffers. 337 */ 338static XMesaBuffer 339alloc_xmesa_buffer(XMesaVisual vis, BufferType type, XMesaColormap cmap) 340{ 341 XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 342 if (b) { 343 b->display = vis->display; 344 b->xm_visual = vis; 345 b->type = type; 346 b->cmap = cmap; 347 348 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 349 350 /* Allocate the framebuffer's renderbuffers */ 351 assert(!b->mesa_buffer.Attachment[BUFFER_FRONT_LEFT].Renderbuffer); 352 assert(!b->mesa_buffer.Attachment[BUFFER_BACK_LEFT].Renderbuffer); 353 354 /* front renderbuffer */ 355 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, vis->mesa_visual.rgbMode, 356 GL_FALSE); 357 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 358 &b->frontxrb->Base); 359 360 /* back renderbuffer */ 361 if (vis->mesa_visual.doubleBufferMode) { 362 b->backxrb = xmesa_new_renderbuffer(NULL, 0, 363 vis->mesa_visual.rgbMode, 364 GL_TRUE); 365 /* determine back buffer implementation */ 366 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 367 368 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 369 &b->backxrb->Base); 370 } 371 372 _mesa_add_soft_renderbuffers(&b->mesa_buffer, 373 GL_FALSE, /* color */ 374 vis->mesa_visual.haveDepthBuffer, 375 vis->mesa_visual.haveStencilBuffer, 376 vis->mesa_visual.haveAccumBuffer, 377 vis->mesa_visual.alphaBits > 0, 378 vis->mesa_visual.numAuxBuffers > 0 ); 379 380 /* insert into linked list */ 381 b->Next = XMesaBufferList; 382 XMesaBufferList = b; 383 } 384 return b; 385} 386 387 388/* 389 * Find an XMesaBuffer by matching X display and colormap but NOT matching 390 * the notThis buffer. 391 */ 392static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 393 XMesaColormap cmap, 394 XMesaBuffer notThis) 395{ 396 XMesaBuffer b; 397 for (b=XMesaBufferList; b; b=b->Next) { 398 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 399 return b; 400 } 401 } 402 return NULL; 403} 404 405 406/* 407 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 408 * entries. 409 */ 410static void free_xmesa_buffer(int client, XMesaBuffer buffer) 411{ 412 XMesaBuffer prev = NULL, b; 413 (void) client; 414 for (b=XMesaBufferList; b; b=b->Next) { 415 if (b==buffer) { 416 /* unlink bufer from list */ 417 if (prev) 418 prev->Next = buffer->Next; 419 else 420 XMesaBufferList = buffer->Next; 421 /* Check to free X colors */ 422 if (buffer->num_alloced>0) { 423 /* If no other buffer uses this X colormap then free the colors. */ 424 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 425#ifdef XFree86Server 426 (void)FreeColors(buffer->cmap, client, 427 buffer->num_alloced, buffer->alloced_colors, 428 0); 429#else 430 XFreeColors(buffer->display, buffer->cmap, 431 buffer->alloced_colors, buffer->num_alloced, 0); 432#endif 433 } 434 } 435 436 _mesa_free_framebuffer_data(&buffer->mesa_buffer); 437 _mesa_free(buffer); 438 439 return; 440 } 441 /* continue search */ 442 prev = b; 443 } 444 /* buffer not found in XMesaBufferList */ 445 _mesa_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 446} 447 448 449/* Copy X color table stuff from one XMesaBuffer to another. */ 450static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 451{ 452 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 453 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 454 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 455 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 456 dst->num_alloced = src->num_alloced; 457 MEMCPY(dst->alloced_colors, src->alloced_colors, 458 sizeof(src->alloced_colors)); 459} 460 461 462 463/**********************************************************************/ 464/***** Misc Private Functions *****/ 465/**********************************************************************/ 466 467 468/** 469 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 470 * Return: GL_TRUE if success, GL_FALSE if error 471 */ 472#ifndef XFree86Server 473static GLboolean 474alloc_shm_back_buffer(XMesaBuffer b, GLuint width, GLuint height) 475{ 476#ifdef USE_XSHM 477 /* 478 * We have to do a _lot_ of error checking here to be sure we can 479 * really use the XSHM extension. It seems different servers trigger 480 * errors at different points if the extension won't work. Therefore 481 * we have to be very careful... 482 */ 483 GC gc; 484 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 485 486 if (width == 0 || height == 0) { 487 /* this will be true the first time we're called on 'b' */ 488 return GL_FALSE; 489 } 490 491 b->backxrb->ximage = XShmCreateImage(b->xm_visual->display, 492 b->xm_visual->visinfo->visual, 493 b->xm_visual->visinfo->depth, 494 ZPixmap, NULL, &b->shminfo, 495 width, height); 496 if (b->backxrb->ximage == NULL) { 497 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 498 b->shm = 0; 499 return GL_FALSE; 500 } 501 502 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backxrb->ximage->bytes_per_line 503 * b->backxrb->ximage->height, IPC_CREAT|0777 ); 504 if (b->shminfo.shmid < 0) { 505 _mesa_warning(NULL, "shmget failed while allocating back buffer"); 506 XDestroyImage( b->backxrb->ximage ); 507 b->backxrb->ximage = NULL; 508 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmget), disabling."); 509 b->shm = 0; 510 return GL_FALSE; 511 } 512 513 b->shminfo.shmaddr = b->backxrb->ximage->data 514 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 515 if (b->shminfo.shmaddr == (char *) -1) { 516 _mesa_warning(NULL, "shmat() failed while allocating back buffer"); 517 XDestroyImage( b->backxrb->ximage ); 518 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 519 b->backxrb->ximage = NULL; 520 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmat), disabling."); 521 b->shm = 0; 522 return GL_FALSE; 523 } 524 525 b->shminfo.readOnly = False; 526 mesaXErrorFlag = 0; 527 old_handler = XSetErrorHandler( mesaHandleXError ); 528 /* This may trigger the X protocol error we're ready to catch: */ 529 XShmAttach( b->xm_visual->display, &b->shminfo ); 530 XSync( b->xm_visual->display, False ); 531 532 if (mesaXErrorFlag) { 533 /* we are on a remote display, this error is normal, don't print it */ 534 XFlush( b->xm_visual->display ); 535 mesaXErrorFlag = 0; 536 XDestroyImage( b->backxrb->ximage ); 537 shmdt( b->shminfo.shmaddr ); 538 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 539 b->backxrb->ximage = NULL; 540 b->shm = 0; 541 (void) XSetErrorHandler( old_handler ); 542 return GL_FALSE; 543 } 544 545 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 546 547 /* Finally, try an XShmPutImage to be really sure the extension works */ 548 gc = XCreateGC( b->xm_visual->display, b->frontxrb->pixmap, 0, NULL ); 549 XShmPutImage( b->xm_visual->display, b->frontxrb->pixmap, gc, 550 b->backxrb->ximage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 551 XSync( b->xm_visual->display, False ); 552 XFreeGC( b->xm_visual->display, gc ); 553 (void) XSetErrorHandler( old_handler ); 554 if (mesaXErrorFlag) { 555 XFlush( b->xm_visual->display ); 556 mesaXErrorFlag = 0; 557 XDestroyImage( b->backxrb->ximage ); 558 shmdt( b->shminfo.shmaddr ); 559 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 560 b->backxrb->ximage = NULL; 561 b->shm = 0; 562 return GL_FALSE; 563 } 564 565 return GL_TRUE; 566#else 567 /* Can't compile XSHM support */ 568 return GL_FALSE; 569#endif 570} 571#endif 572 573 574 575/* 576 * Setup an off-screen pixmap or Ximage to use as the back buffer. 577 * Input: b - the X/Mesa buffer 578 */ 579void 580xmesa_alloc_back_buffer( XMesaBuffer b, GLuint width, GLuint height ) 581{ 582 if (width == 0 || height == 0) 583 return; 584 585 if (b->db_mode == BACK_XIMAGE) { 586 /* Deallocate the old backxrb->ximage, if any */ 587 if (b->backxrb->ximage) { 588#if defined(USE_XSHM) && !defined(XFree86Server) 589 if (b->shm) { 590 XShmDetach( b->xm_visual->display, &b->shminfo ); 591 XDestroyImage( b->backxrb->ximage ); 592 shmdt( b->shminfo.shmaddr ); 593 } 594 else 595#endif 596 XMesaDestroyImage( b->backxrb->ximage ); 597 b->backxrb->ximage = NULL; 598 } 599 600 /* Allocate new back buffer */ 601#ifdef XFree86Server 602 /* Allocate a regular XImage for the back buffer. */ 603 b->backxrb->ximage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 604 width, height, NULL); 605#else 606 if (b->shm == 0 || !alloc_shm_back_buffer(b, width, height)) { 607 /* Allocate a regular XImage for the back buffer. */ 608 b->backxrb->ximage = XCreateImage( b->xm_visual->display, 609 b->xm_visual->visinfo->visual, 610 GET_VISUAL_DEPTH(b->xm_visual), 611 ZPixmap, 0, /* format, offset */ 612 NULL, 613 width, height, 614 8, 0 ); /* pad, bytes_per_line */ 615#endif 616 if (!b->backxrb->ximage) { 617 _mesa_warning(NULL, "alloc_back_buffer: XCreateImage failed."); 618 } 619 b->backxrb->ximage->data = (char *) MALLOC( b->backxrb->ximage->height 620 * b->backxrb->ximage->bytes_per_line ); 621 if (!b->backxrb->ximage->data) { 622 _mesa_warning(NULL, "alloc_back_buffer: MALLOC failed."); 623 XMesaDestroyImage( b->backxrb->ximage ); 624 b->backxrb->ximage = NULL; 625 } 626 } 627 b->backxrb->pixmap = None; 628 b->backxrb->ximage = b->backxrb->ximage; 629 } 630 else if (b->db_mode == BACK_PIXMAP) { 631 if (!width) 632 width = 1; 633 if (!height) 634 height = 1; 635 636 /* Free the old back pixmap */ 637 if (b->backxrb->pixmap) { 638 XMesaFreePixmap( b->xm_visual->display, b->backxrb->pixmap ); 639 } 640 /* Allocate new back pixmap */ 641 b->backxrb->pixmap = XMesaCreatePixmap( b->xm_visual->display, 642 b->frontxrb->pixmap, 643 width, height, 644 GET_VISUAL_DEPTH(b->xm_visual) ); 645 b->backxrb->ximage = NULL; 646 } 647} 648 649 650 651/* 652 * A replacement for XAllocColor. This function should never 653 * fail to allocate a color. When XAllocColor fails, we return 654 * the nearest matching color. If we have to allocate many colors 655 * this function isn't too efficient; the XQueryColors() could be 656 * done just once. 657 * Written by Michael Pichler, Brian Paul, Mark Kilgard 658 * Input: dpy - X display 659 * cmap - X colormap 660 * cmapSize - size of colormap 661 * In/Out: color - the XColor struct 662 * Output: exact - 1=exact color match, 0=closest match 663 * alloced - 1=XAlloc worked, 0=XAlloc failed 664 */ 665static void 666noFaultXAllocColor( int client, 667 XMesaDisplay *dpy, 668 XMesaColormap cmap, 669 int cmapSize, 670 XMesaColor *color, 671 int *exact, int *alloced ) 672{ 673#ifdef XFree86Server 674 Pixel *ppixIn; 675 xrgb *ctable; 676#else 677 /* we'll try to cache ctable for better remote display performance */ 678 static Display *prevDisplay = NULL; 679 static XMesaColormap prevCmap = 0; 680 static int prevCmapSize = 0; 681 static XMesaColor *ctable = NULL; 682#endif 683 XMesaColor subColor; 684 int i, bestmatch; 685 double mindist; /* 3*2^16^2 exceeds long int precision. */ 686 687 (void) client; 688 689 /* First try just using XAllocColor. */ 690#ifdef XFree86Server 691 if (AllocColor(cmap, 692 &color->red, &color->green, &color->blue, 693 &color->pixel, 694 client) == Success) { 695#else 696 if (XAllocColor(dpy, cmap, color)) { 697#endif 698 *exact = 1; 699 *alloced = 1; 700 return; 701 } 702 703 /* Alloc failed, search for closest match */ 704 705 /* Retrieve color table entries. */ 706 /* XXX alloca candidate. */ 707#ifdef XFree86Server 708 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 709 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 710 for (i = 0; i < cmapSize; i++) { 711 ppixIn[i] = i; 712 } 713 QueryColors(cmap, cmapSize, ppixIn, ctable); 714#else 715 if (prevDisplay != dpy || prevCmap != cmap 716 || prevCmapSize != cmapSize || !ctable) { 717 /* free previously cached color table */ 718 if (ctable) 719 _mesa_free(ctable); 720 /* Get the color table from X */ 721 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 722 assert(ctable); 723 for (i = 0; i < cmapSize; i++) { 724 ctable[i].pixel = i; 725 } 726 XQueryColors(dpy, cmap, ctable, cmapSize); 727 prevDisplay = dpy; 728 prevCmap = cmap; 729 prevCmapSize = cmapSize; 730 } 731#endif 732 733 /* Find best match. */ 734 bestmatch = -1; 735 mindist = 0.0; 736 for (i = 0; i < cmapSize; i++) { 737 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 738 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 739 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 740 double dist = dr * dr + dg * dg + db * db; 741 if (bestmatch < 0 || dist < mindist) { 742 bestmatch = i; 743 mindist = dist; 744 } 745 } 746 747 /* Return result. */ 748 subColor.red = ctable[bestmatch].red; 749 subColor.green = ctable[bestmatch].green; 750 subColor.blue = ctable[bestmatch].blue; 751 /* Try to allocate the closest match color. This should only 752 * fail if the cell is read/write. Otherwise, we're incrementing 753 * the cell's reference count. 754 */ 755#ifdef XFree86Server 756 if (AllocColor(cmap, 757 &subColor.red, &subColor.green, &subColor.blue, 758 &subColor.pixel, 759 client) == Success) { 760#else 761 if (XAllocColor(dpy, cmap, &subColor)) { 762#endif 763 *alloced = 1; 764 } 765 else { 766 /* do this to work around a problem reported by Frank Ortega */ 767 subColor.pixel = (unsigned long) bestmatch; 768 subColor.red = ctable[bestmatch].red; 769 subColor.green = ctable[bestmatch].green; 770 subColor.blue = ctable[bestmatch].blue; 771 subColor.flags = DoRed | DoGreen | DoBlue; 772 *alloced = 0; 773 } 774#ifdef XFree86Server 775 _mesa_free(ppixIn); 776 _mesa_free(ctable); 777#else 778 /* don't free table, save it for next time */ 779#endif 780 781 *color = subColor; 782 *exact = 0; 783} 784 785 786 787 788/* 789 * Do setup for PF_GRAYSCALE pixel format. 790 * Note that buffer may be NULL. 791 */ 792static GLboolean setup_grayscale( int client, XMesaVisual v, 793 XMesaBuffer buffer, XMesaColormap cmap ) 794{ 795 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 796 return GL_FALSE; 797 } 798 799 if (buffer) { 800 XMesaBuffer prevBuffer; 801 802 if (!cmap) { 803 return GL_FALSE; 804 } 805 806 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 807 if (prevBuffer && 808 (buffer->xm_visual->mesa_visual.rgbMode == 809 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 810 /* Copy colormap stuff from previous XMesaBuffer which uses same 811 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 812 */ 813 copy_colortable_info(buffer, prevBuffer); 814 } 815 else { 816 /* Allocate 256 shades of gray */ 817 int gray; 818 int colorsfailed = 0; 819 for (gray=0;gray<256;gray++) { 820 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 821 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 822 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 823 int exact, alloced; 824 XMesaColor xcol; 825 xcol.red = (r << 8) | r; 826 xcol.green = (g << 8) | g; 827 xcol.blue = (b << 8) | b; 828 noFaultXAllocColor( client, v->display, 829 cmap, GET_COLORMAP_SIZE(v), 830 &xcol, &exact, &alloced ); 831 if (!exact) { 832 colorsfailed++; 833 } 834 if (alloced) { 835 assert(buffer->num_alloced<256); 836 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 837 buffer->num_alloced++; 838 } 839 840 /*OLD 841 assert(gray < 576); 842 buffer->color_table[gray*3+0] = xcol.pixel; 843 buffer->color_table[gray*3+1] = xcol.pixel; 844 buffer->color_table[gray*3+2] = xcol.pixel; 845 assert(xcol.pixel < 65536); 846 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 847 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 848 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 849 */ 850 buffer->color_table[gray] = xcol.pixel; 851 assert(xcol.pixel < 65536); 852 buffer->pixel_to_r[xcol.pixel] = gray; 853 buffer->pixel_to_g[xcol.pixel] = gray; 854 buffer->pixel_to_b[xcol.pixel] = gray; 855 } 856 857 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 858 _mesa_warning(NULL, 859 "Note: %d out of 256 needed colors do not match exactly.\n", 860 colorsfailed ); 861 } 862 } 863 } 864 865 v->dithered_pf = PF_Grayscale; 866 v->undithered_pf = PF_Grayscale; 867 return GL_TRUE; 868} 869 870 871 872/* 873 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 874 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 875 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 876 * color. While this function was originally designed just for 8-bit 877 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 878 * Dithering code contributed by Bob Mercier. 879 */ 880static GLboolean setup_dithered_color( int client, XMesaVisual v, 881 XMesaBuffer buffer, XMesaColormap cmap ) 882{ 883 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 884 return GL_FALSE; 885 } 886 887 if (buffer) { 888 XMesaBuffer prevBuffer; 889 890 if (!cmap) { 891 return GL_FALSE; 892 } 893 894 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 895 if (prevBuffer && 896 (buffer->xm_visual->mesa_visual.rgbMode == 897 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 898 /* Copy colormap stuff from previous, matching XMesaBuffer. 899 * Do this to avoid time spent in noFaultXAllocColor. 900 */ 901 copy_colortable_info(buffer, prevBuffer); 902 } 903 else { 904 /* Allocate X colors and initialize color_table[], red_table[], etc */ 905 int r, g, b, i; 906 int colorsfailed = 0; 907 for (r = 0; r < DITH_R; r++) { 908 for (g = 0; g < DITH_G; g++) { 909 for (b = 0; b < DITH_B; b++) { 910 XMesaColor xcol; 911 int exact, alloced; 912 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 913 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 914 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 915 noFaultXAllocColor( client, v->display, 916 cmap, GET_COLORMAP_SIZE(v), 917 &xcol, &exact, &alloced ); 918 if (!exact) { 919 colorsfailed++; 920 } 921 if (alloced) { 922 assert(buffer->num_alloced<256); 923 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 924 buffer->num_alloced++; 925 } 926 i = DITH_MIX( r, g, b ); 927 assert(i < 576); 928 buffer->color_table[i] = xcol.pixel; 929 assert(xcol.pixel < 65536); 930 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 931 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 932 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 933 } 934 } 935 } 936 937 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 938 _mesa_warning(NULL, 939 "Note: %d out of %d needed colors do not match exactly.\n", 940 colorsfailed, DITH_R * DITH_G * DITH_B ); 941 } 942 } 943 } 944 945 v->dithered_pf = PF_Dither; 946 v->undithered_pf = PF_Lookup; 947 return GL_TRUE; 948} 949 950 951/* 952 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 953 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 954 * Special dithering tables have to be initialized. 955 */ 956static void setup_8bit_hpcr( XMesaVisual v ) 957{ 958 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 959 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 960 * on the root window AND the colormap obtainable by XGetRGBColormaps 961 * for that atom must be set on the window. (see also tkInitWindow) 962 * If that colormap is not set, the output will look stripy. 963 */ 964 965 /* Setup color tables with gamma correction */ 966 int i; 967 double g; 968 969 g = 1.0 / v->RedGamma; 970 for (i=0; i<256; i++) { 971 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 972 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 973 } 974 975 g = 1.0 / v->GreenGamma; 976 for (i=0; i<256; i++) { 977 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 978 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 979 } 980 981 g = 1.0 / v->BlueGamma; 982 for (i=0; i<256; i++) { 983 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 984 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 985 } 986 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 987 v->dithered_pf = PF_HPCR; 988 989 /* which method should I use to clear */ 990 /* GL_FALSE: keep the ordinary method */ 991 /* GL_TRUE : clear with dither pattern */ 992 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 993 994 if (v->hpcr_clear_flag) { 995 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 996 DefaultRootWindow(v->display), 997 16, 2, 8); 998#ifndef XFree86Server 999 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1000 0, 0, 16, 2, AllPlanes, ZPixmap); 1001#endif 1002 } 1003} 1004 1005 1006/* 1007 * Setup RGB rendering for a window with a True/DirectColor visual. 1008 */ 1009static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1010 XMesaColormap cmap ) 1011{ 1012 unsigned long rmask, gmask, bmask; 1013 (void) buffer; 1014 (void) cmap; 1015 1016 /* Compute red multiplier (mask) and bit shift */ 1017 v->rshift = 0; 1018 rmask = GET_REDMASK(v); 1019 while ((rmask & 1)==0) { 1020 v->rshift++; 1021 rmask = rmask >> 1; 1022 } 1023 1024 /* Compute green multiplier (mask) and bit shift */ 1025 v->gshift = 0; 1026 gmask = GET_GREENMASK(v); 1027 while ((gmask & 1)==0) { 1028 v->gshift++; 1029 gmask = gmask >> 1; 1030 } 1031 1032 /* Compute blue multiplier (mask) and bit shift */ 1033 v->bshift = 0; 1034 bmask = GET_BLUEMASK(v); 1035 while ((bmask & 1)==0) { 1036 v->bshift++; 1037 bmask = bmask >> 1; 1038 } 1039 1040 /* 1041 * Compute component-to-pixel lookup tables and dithering kernel 1042 */ 1043 { 1044 static GLubyte kernel[16] = { 1045 0*16, 8*16, 2*16, 10*16, 1046 12*16, 4*16, 14*16, 6*16, 1047 3*16, 11*16, 1*16, 9*16, 1048 15*16, 7*16, 13*16, 5*16, 1049 }; 1050 GLint rBits = _mesa_bitcount(rmask); 1051 GLint gBits = _mesa_bitcount(gmask); 1052 GLint bBits = _mesa_bitcount(bmask); 1053 GLint maxBits; 1054 GLuint i; 1055 1056 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1057 for (i=0; i<=rmask; i++) 1058 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1059 for (i=0; i<=gmask; i++) 1060 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1061 for (i=0; i<=bmask; i++) 1062 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1063 1064 /* convert RGB values from [0,255] to pixel components */ 1065 1066 for (i=0;i<256;i++) { 1067 GLint r = gamma_adjust(v->RedGamma, i, 255); 1068 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1069 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1070 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1071 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1072 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1073 } 1074 /* overflow protection */ 1075 for (i=256;i<512;i++) { 1076 v->RtoPixel[i] = v->RtoPixel[255]; 1077 v->GtoPixel[i] = v->GtoPixel[255]; 1078 v->BtoPixel[i] = v->BtoPixel[255]; 1079 } 1080 1081 /* setup dithering kernel */ 1082 maxBits = rBits; 1083 if (gBits > maxBits) maxBits = gBits; 1084 if (bBits > maxBits) maxBits = bBits; 1085 for (i=0;i<16;i++) { 1086 v->Kernel[i] = kernel[i] >> maxBits; 1087 } 1088 1089 v->undithered_pf = PF_Truecolor; 1090 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 1091 } 1092 1093 /* 1094 * Now check for TrueColor visuals which we can optimize. 1095 */ 1096 if ( GET_REDMASK(v) ==0x0000ff 1097 && GET_GREENMASK(v)==0x00ff00 1098 && GET_BLUEMASK(v) ==0xff0000 1099 && CHECK_BYTE_ORDER(v) 1100 && v->BitsPerPixel==32 1101 && sizeof(GLuint)==4 1102 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1103 /* common 32 bpp config used on SGI, Sun */ 1104 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1105 } 1106 else if (GET_REDMASK(v) ==0xff0000 1107 && GET_GREENMASK(v)==0x00ff00 1108 && GET_BLUEMASK(v) ==0x0000ff 1109 && CHECK_BYTE_ORDER(v) 1110 && v->BitsPerPixel==32 1111 && sizeof(GLuint)==4 1112 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1113 /* common 32 bpp config used on Linux, HP, IBM */ 1114 if (GET_VISUAL_DEPTH(v)==32) 1115 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; 1116 else 1117 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1118 } 1119 else if (GET_REDMASK(v) ==0xff0000 1120 && GET_GREENMASK(v)==0x00ff00 1121 && GET_BLUEMASK(v) ==0x0000ff 1122 && CHECK_BYTE_ORDER(v) 1123 && v->BitsPerPixel==24 1124 && sizeof(GLuint)==4 1125 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1126 /* common packed 24 bpp config used on Linux */ 1127 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1128 } 1129 else if (GET_REDMASK(v) ==0xf800 1130 && GET_GREENMASK(v)==0x07e0 1131 && GET_BLUEMASK(v) ==0x001f 1132 && CHECK_BYTE_ORDER(v) 1133 && v->BitsPerPixel==16 1134 && sizeof(GLushort)==2 1135 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1136 /* 5-6-5 color weight on common PC VGA boards */ 1137 v->undithered_pf = PF_5R6G5B; 1138 v->dithered_pf = PF_Dither_5R6G5B; 1139 } 1140 else if (GET_REDMASK(v) ==0xe0 1141 && GET_GREENMASK(v)==0x1c 1142 && GET_BLUEMASK(v) ==0x03 1143 && CHECK_FOR_HPCR(v)) { 1144 setup_8bit_hpcr( v ); 1145 } 1146} 1147 1148 1149 1150/* 1151 * Setup RGB rendering for a window with a monochrome visual. 1152 */ 1153static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1154{ 1155 (void) b; 1156 v->dithered_pf = v->undithered_pf = PF_1Bit; 1157 /* if black=1 then we must flip pixel values */ 1158 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1159} 1160 1161 1162 1163/* 1164 * When a context is "made current" for the first time, we can finally 1165 * finish initializing the context's visual and buffer information. 1166 * Input: v - the XMesaVisual to initialize 1167 * b - the XMesaBuffer to initialize (may be NULL) 1168 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1169 * window - the window/pixmap we're rendering into 1170 * cmap - the colormap associated with the window/pixmap 1171 * Return: GL_TRUE=success, GL_FALSE=failure 1172 */ 1173static GLboolean initialize_visual_and_buffer( int client, 1174 XMesaVisual v, 1175 XMesaBuffer b, 1176 GLboolean rgb_flag, 1177 XMesaDrawable window, 1178 XMesaColormap cmap ) 1179{ 1180 struct xmesa_renderbuffer *front_xrb, *back_xrb; 1181#ifndef XFree86Server 1182 XGCValues gcvalues; 1183#endif 1184 1185 if (b) { 1186 assert(b->xm_visual == v); 1187 } 1188 1189 if (b) { 1190 front_xrb = b->frontxrb; 1191 back_xrb = b->backxrb; 1192 } 1193 else { 1194 front_xrb = back_xrb = NULL; 1195 } 1196 1197 /* Save true bits/pixel */ 1198 v->BitsPerPixel = bits_per_pixel(v); 1199 assert(v->BitsPerPixel > 0); 1200 1201 1202 if (rgb_flag==GL_FALSE) { 1203 /* COLOR-INDEXED WINDOW: 1204 * Even if the visual is TrueColor or DirectColor we treat it as 1205 * being color indexed. This is weird but might be useful to someone. 1206 */ 1207 v->dithered_pf = v->undithered_pf = PF_Index; 1208 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1209 } 1210 else { 1211 /* RGB WINDOW: 1212 * We support RGB rendering into almost any kind of visual. 1213 */ 1214 const int xclass = v->mesa_visual.visualType; 1215 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1216 setup_truecolor( v, b, cmap ); 1217 } 1218 else if (xclass==GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v)==1) { 1219 setup_monochrome( v, b ); 1220 } 1221 else if (xclass==GLX_GRAY_SCALE || xclass==GLX_STATIC_GRAY) { 1222 if (!setup_grayscale( client, v, b, cmap )) { 1223 return GL_FALSE; 1224 } 1225 } 1226 else if ((xclass==GLX_PSEUDO_COLOR || xclass==GLX_STATIC_COLOR) 1227 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1228 if (!setup_dithered_color( client, v, b, cmap )) { 1229 return GL_FALSE; 1230 } 1231 } 1232 else { 1233 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual."); 1234 return GL_FALSE; 1235 } 1236 v->mesa_visual.indexBits = 0; 1237 1238 if (_mesa_getenv("MESA_NO_DITHER")) { 1239 v->dithered_pf = v->undithered_pf; 1240 } 1241 } 1242 1243 1244 /* 1245 * If MESA_INFO env var is set print out some debugging info 1246 * which can help Brian figure out what's going on when a user 1247 * reports bugs. 1248 */ 1249 if (_mesa_getenv("MESA_INFO")) { 1250 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1251 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1252 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1253 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1254 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1255 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1256 } 1257 1258 if (b && window) { 1259 /* Do window-specific initializations */ 1260 1261 b->frontxrb->pixmap = window; 1262 1263 /* Setup for single/double buffering */ 1264 if (v->mesa_visual.doubleBufferMode) { 1265 /* Double buffered */ 1266 b->shm = check_for_xshm( v->display ); 1267 xmesa_alloc_back_buffer(b, b->mesa_buffer.Width, b->mesa_buffer.Height); 1268 } 1269 1270 /* X11 graphics contexts */ 1271#ifdef XFree86Server 1272 b->gc = CreateScratchGC(v->display, window->depth); 1273#else 1274 b->gc = XCreateGC( v->display, window, 0, NULL ); 1275#endif 1276 XMesaSetFunction( v->display, b->gc, GXcopy ); 1277 1278 /* cleargc - for glClear() */ 1279#ifdef XFree86Server 1280 b->cleargc = CreateScratchGC(v->display, window->depth); 1281#else 1282 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1283#endif 1284 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1285 1286 /* 1287 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1288 * Patch contributed by Michael Pichler May 15, 1995. 1289 */ 1290#ifdef XFree86Server 1291 b->swapgc = CreateScratchGC(v->display, window->depth); 1292 { 1293 CARD32 v[1]; 1294 v[0] = FALSE; 1295 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1296 } 1297#else 1298 gcvalues.graphics_exposures = False; 1299 b->swapgc = XCreateGC( v->display, window, 1300 GCGraphicsExposures, &gcvalues); 1301#endif 1302 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1303 /* 1304 * Set fill style and tile pixmap once for all for HPCR stuff 1305 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1306 * Initialize whole stuff 1307 * Patch contributed by Jacques Leroy March 8, 1998. 1308 */ 1309 if (v->hpcr_clear_flag && back_xrb->pixmap) { 1310 int i; 1311 for (i=0; i<16; i++) 1312 { 1313 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1314 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1315 } 1316 XMesaPutImage(b->display, (XMesaDrawable)v->hpcr_clear_pixmap, 1317 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1318 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1319 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1320 } 1321 1322 /* Initialize the row buffer XImage for use in write_color_span() */ 1323#ifdef XFree86Server 1324 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1325 (char *)MALLOC(MAX_WIDTH*4)); 1326#else 1327 b->rowimage = XCreateImage( v->display, 1328 v->visinfo->visual, 1329 v->visinfo->depth, 1330 ZPixmap, 0, /*format, offset*/ 1331 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1332 MAX_WIDTH, 1, /*width, height*/ 1333 32, /*bitmap_pad*/ 1334 0 /*bytes_per_line*/ ); 1335#endif 1336 if (!b->rowimage) 1337 return GL_FALSE; 1338 } 1339 1340 return GL_TRUE; 1341} 1342 1343 1344 1345/* 1346 * Convert an RGBA color to a pixel value. 1347 */ 1348unsigned long 1349xmesa_color_to_pixel(GLcontext *ctx, 1350 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1351 GLuint pixelFormat) 1352{ 1353 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1354 switch (pixelFormat) { 1355 case PF_Index: 1356 return 0; 1357 case PF_Truecolor: 1358 { 1359 unsigned long p; 1360 PACK_TRUECOLOR( p, r, g, b ); 1361 return p; 1362 } 1363 case PF_8A8B8G8R: 1364 return PACK_8A8B8G8R( r, g, b, a ); 1365 case PF_8A8R8G8B: 1366 return PACK_8A8R8G8B( r, g, b, a ); 1367 case PF_8R8G8B: 1368 /* fall through */ 1369 case PF_8R8G8B24: 1370 return PACK_8R8G8B( r, g, b ); 1371 case PF_5R6G5B: 1372 return PACK_5R6G5B( r, g, b ); 1373 case PF_Dither: 1374 { 1375 DITHER_SETUP; 1376 return DITHER( 1, 0, r, g, b ); 1377 } 1378 case PF_1Bit: 1379 /* 382 = (3*255)/2 */ 1380 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1381 case PF_HPCR: 1382 return DITHER_HPCR(1, 1, r, g, b); 1383 case PF_Lookup: 1384 { 1385 LOOKUP_SETUP; 1386 return LOOKUP( r, g, b ); 1387 } 1388 case PF_Grayscale: 1389 return GRAY_RGB( r, g, b ); 1390 case PF_Dither_True: 1391 /* fall through */ 1392 case PF_Dither_5R6G5B: 1393 { 1394 unsigned long p; 1395 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1396 return p; 1397 } 1398 default: 1399 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1400 } 1401 return 0; 1402} 1403 1404 1405#define NUM_VISUAL_TYPES 6 1406 1407/** 1408 * Convert an X visual type to a GLX visual type. 1409 * 1410 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1411 * to be converted. 1412 * \return If \c visualType is a valid X visual type, a GLX visual type will 1413 * be returned. Otherwise \c GLX_NONE will be returned. 1414 * 1415 * \note 1416 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1417 * DRI CVS tree. 1418 */ 1419static GLint 1420xmesa_convert_from_x_visual_type( int visualType ) 1421{ 1422 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1423 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1424 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1425 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1426 }; 1427 1428 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1429 ? glx_visual_types[ visualType ] : GLX_NONE; 1430} 1431 1432 1433/**********************************************************************/ 1434/***** Public Functions *****/ 1435/**********************************************************************/ 1436 1437 1438/* 1439 * Create a new X/Mesa visual. 1440 * Input: display - X11 display 1441 * visinfo - an XVisualInfo pointer 1442 * rgb_flag - GL_TRUE = RGB mode, 1443 * GL_FALSE = color index mode 1444 * alpha_flag - alpha buffer requested? 1445 * db_flag - GL_TRUE = double-buffered, 1446 * GL_FALSE = single buffered 1447 * stereo_flag - stereo visual? 1448 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1449 * GL_FALSE = use an off-screen pixmap for back buffer 1450 * depth_size - requested bits/depth values, or zero 1451 * stencil_size - requested bits/stencil values, or zero 1452 * accum_red_size - requested bits/red accum values, or zero 1453 * accum_green_size - requested bits/green accum values, or zero 1454 * accum_blue_size - requested bits/blue accum values, or zero 1455 * accum_alpha_size - requested bits/alpha accum values, or zero 1456 * num_samples - number of samples/pixel if multisampling, or zero 1457 * level - visual level, usually 0 1458 * visualCaveat - ala the GLX extension, usually GLX_NONE 1459 * Return; a new XMesaVisual or 0 if error. 1460 */ 1461XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1462 XMesaVisualInfo visinfo, 1463 GLboolean rgb_flag, 1464 GLboolean alpha_flag, 1465 GLboolean db_flag, 1466 GLboolean stereo_flag, 1467 GLboolean ximage_flag, 1468 GLint depth_size, 1469 GLint stencil_size, 1470 GLint accum_red_size, 1471 GLint accum_green_size, 1472 GLint accum_blue_size, 1473 GLint accum_alpha_size, 1474 GLint num_samples, 1475 GLint level, 1476 GLint visualCaveat ) 1477{ 1478 char *gamma; 1479 XMesaVisual v; 1480 GLint red_bits, green_bits, blue_bits, alpha_bits; 1481 1482 /* For debugging only */ 1483 if (_mesa_getenv("MESA_XSYNC")) { 1484 /* This makes debugging X easier. 1485 * In your debugger, set a breakpoint on _XError to stop when an 1486 * X protocol error is generated. 1487 */ 1488#ifdef XFree86Server 1489 /* NOT_NEEDED */ 1490#else 1491 XSynchronize( display, 1 ); 1492#endif 1493 } 1494 1495 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1496 if (!v) { 1497 return NULL; 1498 } 1499 1500 /* 1501 * In the X server, NULL is passed in for the display. It will have 1502 * to be set before using this visual. See XMesaSetVisualDisplay() 1503 * below. 1504 */ 1505 v->display = display; 1506 1507 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 1508 * the struct but we may need some of the information contained in it 1509 * at a later time. 1510 */ 1511#ifndef XFree86Server 1512 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1513 if(!v->visinfo) { 1514 _mesa_free(v); 1515 return NULL; 1516 } 1517 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1518#endif 1519 1520 /* check for MESA_GAMMA environment variable */ 1521 gamma = _mesa_getenv("MESA_GAMMA"); 1522 if (gamma) { 1523 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1524 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1525 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1526 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1527 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1528 } 1529 else { 1530 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1531 } 1532 1533 v->ximage_flag = ximage_flag; 1534 1535#ifdef XFree86Server 1536 /* We could calculate these values by ourselves. nplanes is either the sum 1537 * of the red, green, and blue bits or the number index bits. 1538 * ColormapEntries is either (1U << index_bits) or 1539 * (1U << max(redBits, greenBits, blueBits)). 1540 */ 1541 v->nplanes = visinfo->nplanes; 1542 v->ColormapEntries = visinfo->ColormapEntries; 1543 1544 v->mesa_visual.redMask = visinfo->redMask; 1545 v->mesa_visual.greenMask = visinfo->greenMask; 1546 v->mesa_visual.blueMask = visinfo->blueMask; 1547 v->mesa_visual.visualID = visinfo->vid; 1548 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1549#else 1550 v->mesa_visual.redMask = visinfo->red_mask; 1551 v->mesa_visual.greenMask = visinfo->green_mask; 1552 v->mesa_visual.blueMask = visinfo->blue_mask; 1553 v->mesa_visual.visualID = visinfo->visualid; 1554 v->mesa_visual.screen = visinfo->screen; 1555#endif 1556 1557#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1558 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1559#else 1560 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1561#endif 1562 1563 v->mesa_visual.visualRating = visualCaveat; 1564 1565 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1566 1567 { 1568 const int xclass = v->mesa_visual.visualType; 1569 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1570 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1571 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1572 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1573 alpha_bits = 0; 1574 } 1575 else { 1576 /* this is an approximation */ 1577 int depth; 1578 depth = GET_VISUAL_DEPTH(v); 1579 red_bits = depth / 3; 1580 depth -= red_bits; 1581 green_bits = depth / 2; 1582 depth -= green_bits; 1583 blue_bits = depth; 1584 alpha_bits = 0; 1585 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1586 } 1587 } 1588 1589 if (alpha_flag && alpha_bits == 0) 1590 alpha_bits = 8; 1591 1592 _mesa_initialize_visual( &v->mesa_visual, 1593 rgb_flag, db_flag, stereo_flag, 1594 red_bits, green_bits, 1595 blue_bits, alpha_bits, 1596 v->mesa_visual.indexBits, 1597 depth_size, 1598 stencil_size, 1599 accum_red_size, accum_green_size, 1600 accum_blue_size, accum_alpha_size, 1601 0 ); 1602 1603 /* XXX minor hack */ 1604 v->mesa_visual.level = level; 1605 return v; 1606} 1607 1608 1609void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1610{ 1611 v->display = dpy; 1612} 1613 1614 1615void XMesaDestroyVisual( XMesaVisual v ) 1616{ 1617#ifndef XFree86Server 1618 _mesa_free(v->visinfo); 1619#endif 1620 _mesa_free(v); 1621} 1622 1623 1624 1625/** 1626 * Create a new XMesaContext. 1627 * \param v the XMesaVisual 1628 * \param share_list another XMesaContext with which to share display 1629 * lists or NULL if no sharing is wanted. 1630 * \return an XMesaContext or NULL if error. 1631 */ 1632XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1633{ 1634 static GLboolean firstTime = GL_TRUE; 1635 XMesaContext c; 1636 GLcontext *mesaCtx; 1637 struct dd_function_table functions; 1638 TNLcontext *tnl; 1639 1640 if (firstTime) { 1641 _glthread_INIT_MUTEX(_xmesa_lock); 1642 firstTime = GL_FALSE; 1643 } 1644 1645 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1646 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1647 if (!c) 1648 return NULL; 1649 1650 mesaCtx = &(c->mesa); 1651 1652 /* initialize with default driver functions, then plug in XMesa funcs */ 1653 _mesa_init_driver_functions(&functions); 1654 xmesa_init_driver_functions(v, &functions); 1655 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1656 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1657 &functions, (void *) c)) { 1658 _mesa_free(c); 1659 return NULL; 1660 } 1661 1662 _mesa_enable_sw_extensions(mesaCtx); 1663 _mesa_enable_1_3_extensions(mesaCtx); 1664 _mesa_enable_1_4_extensions(mesaCtx); 1665 _mesa_enable_1_5_extensions(mesaCtx); 1666 _mesa_enable_2_0_extensions(mesaCtx); 1667#if ENABLE_EXT_texure_compression_s3tc 1668 if (c->Mesa_DXTn) { 1669 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1670 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1671 } 1672 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1673#endif 1674#if ENABLE_EXT_timer_query 1675 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1676#endif 1677 1678 /* finish up xmesa context initializations */ 1679 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1680 c->xm_visual = v; 1681 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1682 c->display = v->display; 1683 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1684 1685 /* Initialize the software rasterizer and helper modules. 1686 */ 1687 if (!_swrast_CreateContext( mesaCtx ) || 1688 !_ac_CreateContext( mesaCtx ) || 1689 !_tnl_CreateContext( mesaCtx ) || 1690 !_swsetup_CreateContext( mesaCtx )) { 1691 _mesa_free_context_data(&c->mesa); 1692 _mesa_free(c); 1693 return NULL; 1694 } 1695 1696 /* tnl setup */ 1697 tnl = TNL_CONTEXT(mesaCtx); 1698 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1699 /* swrast setup */ 1700 xmesa_register_swrast_functions( mesaCtx ); 1701 _swsetup_Wakeup(mesaCtx); 1702 1703 return c; 1704} 1705 1706 1707 1708void XMesaDestroyContext( XMesaContext c ) 1709{ 1710 GLcontext *mesaCtx = &c->mesa; 1711#ifdef FX 1712 XMesaBuffer xmbuf = XMESA_BUFFER(mesaCtx->DrawBuffer); 1713 1714 if (xmbuf && xmbuf->FXctx) 1715 fxMesaDestroyContext(xmbuf->FXctx); 1716#endif 1717 _swsetup_DestroyContext( mesaCtx ); 1718 _swrast_DestroyContext( mesaCtx ); 1719 _tnl_DestroyContext( mesaCtx ); 1720 _ac_DestroyContext( mesaCtx ); 1721 _mesa_free_context_data( mesaCtx ); 1722 _mesa_free( c ); 1723} 1724 1725 1726 1727/* 1728 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1729 * Create a new XMesaBuffer from an X window. 1730 * Input: v - the XMesaVisual 1731 * w - the window 1732 * c - the context 1733 * Return: new XMesaBuffer or NULL if error 1734 */ 1735XMesaBuffer 1736XMesaCreateWindowBuffer2(XMesaVisual v, XMesaWindow w, XMesaContext c) 1737{ 1738#ifndef XFree86Server 1739 XWindowAttributes attr; 1740#endif 1741#ifdef FX 1742 char *fxEnvVar; 1743#endif 1744 int client = 0; 1745 XMesaBuffer b; 1746 XMesaColormap cmap; 1747 1748 assert(v); 1749 (void) c; 1750 1751 /* Check that window depth matches visual depth */ 1752#ifdef XFree86Server 1753 client = CLIENT_ID(((XMesaDrawable)w)->id); 1754 1755 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1756 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1757 GET_VISUAL_DEPTH(v), ((XMesaDrawable) w)->depth); 1758 return NULL; 1759 } 1760#else 1761 XGetWindowAttributes( v->display, w, &attr ); 1762 1763 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1764 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1765 GET_VISUAL_DEPTH(v), attr.depth); 1766 return NULL; 1767 } 1768#endif 1769 1770 /* Find colormap */ 1771#ifdef XFree86Server 1772 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1773#else 1774 if (attr.colormap) { 1775 cmap = attr.colormap; 1776 } 1777 else { 1778 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1779 /* this is weird, a window w/out a colormap!? */ 1780 /* OK, let's just allocate a new one and hope for the best */ 1781 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1782 } 1783#endif 1784 1785 b = alloc_xmesa_buffer(v, WINDOW, cmap); 1786 if (!b) { 1787 return NULL; 1788 } 1789 1790 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1791 (XMesaDrawable)w, cmap )) { 1792 free_xmesa_buffer(client, b); 1793 return NULL; 1794 } 1795 1796#ifdef FX 1797 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1798 if (fxEnvVar) { 1799 if (fxEnvVar[0]!='d') { 1800 int attribs[100]; 1801 int numAttribs = 0; 1802 int hw; 1803 if (v->mesa_visual.depthBits > 0) { 1804 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1805 attribs[numAttribs++] = v->mesa_visual.depthBits; 1806 } 1807 if (v->mesa_visual.doubleBufferMode) { 1808 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1809 } 1810 if (v->mesa_visual.accumRedBits > 0) { 1811 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1812 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1813 } 1814 if (v->mesa_visual.stencilBits > 0) { 1815 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1816 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1817 } 1818 if (v->mesa_visual.alphaBits > 0) { 1819 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1820 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1821 } 1822 if (1) { 1823 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1824 attribs[numAttribs++] = (int) &(c->mesa); 1825 } 1826 attribs[numAttribs++] = FXMESA_NONE; 1827 1828 /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ 1829 hw = fxMesaSelectCurrentBoard(0); 1830 1831 /* if these fail, there's a new bug somewhere */ 1832 ASSERT(b->mesa_buffer.Width > 0); 1833 ASSERT(b->mesa_buffer.Height > 0); 1834 1835 if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) { 1836 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1837 b->mesa_buffer.Height, attribs); 1838 if ((v->undithered_pf!=PF_Index) && (b->backxrb->ximage)) { 1839 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1840 if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) { 1841 b->FXwindowHack = GL_TRUE; 1842 FX_grSstControl(GR_CONTROL_DEACTIVATE); 1843 } 1844 else { 1845 b->FXwindowHack = GL_FALSE; 1846 } 1847 } 1848 } 1849 else { 1850 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1851 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1852 GR_REFRESH_75Hz, attribs); 1853 else 1854 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1855 b->mesa_buffer.Height, attribs); 1856 b->FXisHackUsable = GL_FALSE; 1857 b->FXwindowHack = GL_FALSE; 1858 } 1859 /* 1860 fprintf(stderr, 1861 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1862 hw, b->mesa_buffer.Width, b->mesa_buffer.Height, 1863 b->FXisHackUsable, b->FXwindowHack); 1864 */ 1865 } 1866 } 1867 else { 1868 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1869 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1870 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1871 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1872 } 1873#endif 1874 1875 return b; 1876} 1877 1878 1879XMesaBuffer 1880XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1881{ 1882 return XMesaCreateWindowBuffer2( v, w, NULL ); 1883} 1884 1885 1886/** 1887 * Create a new XMesaBuffer from an X pixmap. 1888 * 1889 * \param v the XMesaVisual 1890 * \param p the pixmap 1891 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1892 * \c GLX_DIRECT_COLOR visual for the pixmap 1893 * \returns new XMesaBuffer or NULL if error 1894 */ 1895XMesaBuffer 1896XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1897{ 1898 int client = 0; 1899 XMesaBuffer b; 1900 1901 assert(v); 1902 1903 b = alloc_xmesa_buffer(v, PIXMAP, cmap); 1904 if (!b) { 1905 return NULL; 1906 } 1907 1908#ifdef XFree86Server 1909 client = CLIENT_ID(((XMesaDrawable)p)->id); 1910#endif 1911 1912 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1913 (XMesaDrawable)p, cmap)) { 1914 free_xmesa_buffer(client, b); 1915 return NULL; 1916 } 1917 1918 return b; 1919} 1920 1921 1922 1923XMesaBuffer 1924XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1925 unsigned int width, unsigned int height) 1926{ 1927#ifdef XFree86Server 1928 return 0; 1929#else 1930 int client = 0; 1931 XMesaWindow root; 1932 XMesaDrawable drawable; /* X Pixmap Drawable */ 1933 XMesaBuffer b; 1934 1935 b = alloc_xmesa_buffer(v, PBUFFER, cmap); 1936 if (!b) { 1937 return NULL; 1938 } 1939 1940 /* allocate pixmap for front buffer */ 1941 root = RootWindow( v->display, v->visinfo->screen ); 1942 drawable = XCreatePixmap( v->display, root, width, height, v->visinfo->depth ); 1943 1944 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1945 drawable, cmap)) { 1946 free_xmesa_buffer(client, b); 1947 return NULL; 1948 } 1949 1950 return b; 1951#endif 1952} 1953 1954 1955 1956/* 1957 * Deallocate an XMesaBuffer structure and all related info. 1958 */ 1959void XMesaDestroyBuffer( XMesaBuffer b ) 1960{ 1961 int client = 0; 1962 1963#ifdef XFree86Server 1964 if (b->frontxrb->pixmap) 1965 client = CLIENT_ID(b->frontxrb->pixmap->id); 1966#endif 1967 1968 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1969 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1970 if (b->swapgc) XMesaFreeGC( b->xm_visual->display, b->swapgc ); 1971 1972 if (b->xm_visual->mesa_visual.doubleBufferMode) 1973 { 1974 if (b->backxrb->ximage) { 1975#if defined(USE_XSHM) && !defined(XFree86Server) 1976 if (b->shm) { 1977 XShmDetach( b->xm_visual->display, &b->shminfo ); 1978 XDestroyImage( b->backxrb->ximage ); 1979 shmdt( b->shminfo.shmaddr ); 1980 } 1981 else 1982#endif 1983 XMesaDestroyImage( b->backxrb->ximage ); 1984 } 1985 if (b->backxrb->pixmap) { 1986 XMesaFreePixmap( b->xm_visual->display, b->backxrb->pixmap ); 1987 if (b->xm_visual->hpcr_clear_flag) { 1988 XMesaFreePixmap( b->xm_visual->display, 1989 b->xm_visual->hpcr_clear_pixmap ); 1990 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 1991 } 1992 } 1993 } 1994 if (b->rowimage) { 1995 _mesa_free( b->rowimage->data ); 1996 b->rowimage->data = NULL; 1997 XMesaDestroyImage( b->rowimage ); 1998 } 1999 2000 free_xmesa_buffer(client, b); 2001} 2002 2003 2004 2005/* 2006 * Bind buffer b to context c and make c the current rendering context. 2007 */ 2008GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2009{ 2010 return XMesaMakeCurrent2( c, b, b ); 2011} 2012 2013 2014/* 2015 * Bind buffer b to context c and make c the current rendering context. 2016 */ 2017GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2018 XMesaBuffer readBuffer ) 2019{ 2020 if (c) { 2021 if (!drawBuffer || !readBuffer) 2022 return GL_FALSE; /* must specify buffers! */ 2023 2024#ifdef FX 2025 if (drawBuffer->FXctx) { 2026 fxMesaMakeCurrent(drawBuffer->FXctx); 2027 2028 c->xm_buffer = drawBuffer; 2029 2030 return GL_TRUE; 2031 } 2032#endif 2033 if (&(c->mesa) == _mesa_get_current_context() 2034 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 2035 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 2036 && ((XMesaBuffer) c->mesa.DrawBuffer)->wasCurrent) { 2037 /* same context and buffer, do nothing */ 2038 return GL_TRUE; 2039 } 2040 2041 c->xm_buffer = drawBuffer; 2042 2043 _mesa_make_current(&(c->mesa), 2044 &drawBuffer->mesa_buffer, 2045 &readBuffer->mesa_buffer); 2046 2047 if (c->xm_visual->mesa_visual.rgbMode) { 2048 /* 2049 * Must recompute and set these pixel values because colormap 2050 * can be different for different windows. 2051 */ 2052 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 2053 c->clearcolor[0], 2054 c->clearcolor[1], 2055 c->clearcolor[2], 2056 c->clearcolor[3], 2057 c->xm_visual->undithered_pf); 2058 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 2059 } 2060 2061 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2062 drawBuffer->wasCurrent = GL_TRUE; 2063 } 2064 else { 2065 /* Detach */ 2066 _mesa_make_current( NULL, NULL, NULL ); 2067 } 2068 return GL_TRUE; 2069} 2070 2071 2072/* 2073 * Unbind the context c from its buffer. 2074 */ 2075GLboolean XMesaUnbindContext( XMesaContext c ) 2076{ 2077 /* A no-op for XFree86 integration purposes */ 2078 return GL_TRUE; 2079} 2080 2081 2082XMesaContext XMesaGetCurrentContext( void ) 2083{ 2084 GET_CURRENT_CONTEXT(ctx); 2085 if (ctx) { 2086 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2087 return xmesa; 2088 } 2089 else { 2090 return 0; 2091 } 2092} 2093 2094 2095XMesaBuffer XMesaGetCurrentBuffer( void ) 2096{ 2097 GET_CURRENT_CONTEXT(ctx); 2098 if (ctx) { 2099 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 2100 return xmbuf; 2101 } 2102 else { 2103 return 0; 2104 } 2105} 2106 2107 2108/* New in Mesa 3.1 */ 2109XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2110{ 2111 GET_CURRENT_CONTEXT(ctx); 2112 if (ctx) { 2113 return (XMesaBuffer) (ctx->ReadBuffer); 2114 } 2115 else { 2116 return 0; 2117 } 2118} 2119 2120 2121GLboolean XMesaForceCurrent(XMesaContext c) 2122{ 2123 if (c) { 2124 if (&(c->mesa) != _mesa_get_current_context()) { 2125 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 2126 } 2127 } 2128 else { 2129 _mesa_make_current(NULL, NULL, NULL); 2130 } 2131 return GL_TRUE; 2132} 2133 2134 2135GLboolean XMesaLoseCurrent(XMesaContext c) 2136{ 2137 (void) c; 2138 _mesa_make_current(NULL, NULL, NULL); 2139 return GL_TRUE; 2140} 2141 2142 2143/* 2144 * Switch 3Dfx support hack between window and full-screen mode. 2145 */ 2146GLboolean XMesaSetFXmode( GLint mode ) 2147{ 2148#ifdef FX 2149 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2150 if (fx && fx[0] != 'd') { 2151 GET_CURRENT_CONTEXT(ctx); 2152 GrHwConfiguration hw; 2153 if (!FX_grSstQueryHardware(&hw)) { 2154 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2155 return GL_FALSE; 2156 } 2157 if (hw.num_sst < 1) { 2158 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2159 return GL_FALSE; 2160 } 2161 if (ctx) { 2162 /* [dBorca] Hack alert: 2163 * oh, this is sooo wrong: ctx above is 2164 * really an fxMesaContext, not an XMesaContext 2165 */ 2166 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 2167 if (mode == XMESA_FX_WINDOW) { 2168 if (xmbuf->FXisHackUsable) { 2169 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2170 xmbuf->FXwindowHack = GL_TRUE; 2171 return GL_TRUE; 2172 } 2173 } 2174 else if (mode == XMESA_FX_FULLSCREEN) { 2175 FX_grSstControl(GR_CONTROL_ACTIVATE); 2176 xmbuf->FXwindowHack = GL_FALSE; 2177 return GL_TRUE; 2178 } 2179 else { 2180 /* Error: Bad mode value */ 2181 } 2182 } 2183 } 2184 /*fprintf(stderr, "fallthrough\n");*/ 2185#else 2186 (void) mode; 2187#endif 2188 return GL_FALSE; 2189} 2190 2191 2192 2193#ifdef FX 2194/* 2195 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2196 */ 2197static void FXgetImage( XMesaBuffer b ) 2198{ 2199 GET_CURRENT_CONTEXT(ctx); 2200 static unsigned short pixbuf[MAX_WIDTH]; 2201 GLuint x, y; 2202 int xpos, ypos; 2203 XMesaWindow root; 2204 unsigned int bw, depth, width, height; 2205 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2206 2207#ifdef XFree86Server 2208 x = b->frontxrb->pixmap->x; 2209 y = b->frontxrb->pixmap->y; 2210 width = b->frontxrb->pixmap->width; 2211 height = b->frontxrb->pixmap->height; 2212 depth = b->frontxrb->pixmap->depth; 2213#else 2214 XGetGeometry( b->xm_visual->display, b->frontxrb->pixmap, 2215 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2216#endif 2217 if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) { 2218 b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width); 2219 b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height); 2220 if (b->mesa_buffer.Width & 1) 2221 b->mesa_buffer.Width--; /* prevent odd width */ 2222 xmesa_alloc_back_buffer(b, b->mesa_buffer.Width, b->mesa_buffer.Height); 2223 } 2224 2225 /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */ 2226 /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */ 2227 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2228 /* Special case: 16bpp RGB */ 2229 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2230 0, b->FXctx->height - b->mesa_buffer.Height, /*pos*/ 2231 b->mesa_buffer.Width, b->mesa_buffer.Height, /* size */ 2232 b->mesa_buffer.Width * sizeof(GLushort), /* stride */ 2233 b->backxrb->ximage->data); /* dest buffer */ 2234 } 2235 else if (b->xm_visual->dithered_pf==PF_Dither 2236 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2237 /* Special case: 8bpp RGB */ 2238 for (y=0;y<b->mesa_buffer.Height;y++) { 2239 GLubyte *ptr = (GLubyte*) b->backxrb->ximage->data 2240 + b->backxrb->ximage->bytes_per_line * y; 2241 XDITHER_SETUP(y); 2242 2243 /* read row from 3Dfx frame buffer */ 2244 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2245 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2246 b->mesa_buffer.Width, 1, 2247 0, 2248 pixbuf ); 2249 2250 /* write to XImage back buffer */ 2251 for (x=0;x<b->mesa_buffer.Width;x++) { 2252 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2253 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2254 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2255 *ptr++ = XDITHER( x, r, g, b); 2256 } 2257 } 2258 } 2259 else { 2260 /* General case: slow! */ 2261 for (y=0;y<b->mesa_buffer.Height;y++) { 2262 /* read row from 3Dfx frame buffer */ 2263 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2264 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2265 b->mesa_buffer.Width, 1, 2266 0, 2267 pixbuf ); 2268 2269 /* write to XImage back buffer */ 2270 for (x=0;x<b->mesa_buffer.Width;x++) { 2271 XMesaPutPixel(b->backxrb->ximage,x,y, 2272 xmesa_color_to_pixel(ctx, 2273 (pixbuf[x] & 0xf800) >> 8, 2274 (pixbuf[x] & 0x07e0) >> 3, 2275 (pixbuf[x] & 0x001f) << 3, 2276 0xff, 2277 b->xm_visual->undithered_pf)); 2278 } 2279 } 2280 } 2281 /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */ 2282} 2283#endif 2284 2285 2286/* 2287 * Copy the back buffer to the front buffer. If there's no back buffer 2288 * this is a no-op. 2289 */ 2290void XMesaSwapBuffers( XMesaBuffer b ) 2291{ 2292 GET_CURRENT_CONTEXT(ctx); 2293 2294 if (!b->backxrb) { 2295 /* single buffered */ 2296 return; 2297 } 2298 2299 /* If we're swapping the buffer associated with the current context 2300 * we have to flush any pending rendering commands first. 2301 */ 2302 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2303 _mesa_notifySwapBuffers(ctx); 2304 2305 if (b->db_mode) { 2306#ifdef FX 2307 if (b->FXctx) { 2308 fxMesaSwapBuffers(); 2309 2310 if (b->FXwindowHack) 2311 FXgetImage(b); 2312 else 2313 return; 2314 } 2315#endif 2316 if (b->backxrb->ximage) { 2317 /* Copy Ximage from host's memory to server's window */ 2318#if defined(USE_XSHM) && !defined(XFree86Server) 2319 if (b->shm) { 2320 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2321 XShmPutImage( b->xm_visual->display, b->frontxrb->pixmap, 2322 b->swapgc, 2323 b->backxrb->ximage, 0, 0, 2324 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2325 False ); 2326 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2327 } 2328 else 2329#endif 2330 { 2331 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2332 XMesaPutImage( b->xm_visual->display, b->frontxrb->pixmap, 2333 b->swapgc, 2334 b->backxrb->ximage, 0, 0, 2335 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2336 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2337 } 2338 } 2339 else { 2340 /* Copy pixmap to window on server */ 2341 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2342 XMesaCopyArea( b->xm_visual->display, 2343 b->backxrb->pixmap, /* source drawable */ 2344 b->frontxrb->pixmap, /* dest. drawable */ 2345 b->swapgc, 2346 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2347 0, 0 /* dest region */ 2348 ); 2349 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2350 } 2351 } 2352#if !defined(XFree86Server) 2353 XSync( b->xm_visual->display, False ); 2354#endif 2355} 2356 2357 2358 2359/* 2360 * Copy sub-region of back buffer to front buffer 2361 */ 2362void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2363{ 2364 GET_CURRENT_CONTEXT(ctx); 2365 2366 /* If we're swapping the buffer associated with the current context 2367 * we have to flush any pending rendering commands first. 2368 */ 2369 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2370 _mesa_notifySwapBuffers(ctx); 2371 2372 if (!b->backxrb) { 2373 /* single buffered */ 2374 return; 2375 } 2376 2377 if (b->db_mode) { 2378 int yTop = b->mesa_buffer.Height - y - height; 2379#ifdef FX 2380 if (b->FXctx) { 2381 fxMesaSwapBuffers(); 2382 if (b->FXwindowHack) 2383 FXgetImage(b); 2384 else 2385 return; 2386 } 2387#endif 2388 if (b->backxrb->ximage) { 2389 /* Copy Ximage from host's memory to server's window */ 2390#if defined(USE_XSHM) && !defined(XFree86Server) 2391 if (b->shm) { 2392 /* XXX assuming width and height aren't too large! */ 2393 XShmPutImage( b->xm_visual->display, b->frontxrb->pixmap, 2394 b->swapgc, 2395 b->backxrb->ximage, x, yTop, 2396 x, yTop, width, height, False ); 2397 /* wait for finished event??? */ 2398 } 2399 else 2400#endif 2401 { 2402 /* XXX assuming width and height aren't too large! */ 2403 XMesaPutImage( b->xm_visual->display, b->frontxrb->pixmap, 2404 b->swapgc, 2405 b->backxrb->ximage, x, yTop, 2406 x, yTop, width, height ); 2407 } 2408 } 2409 else { 2410 /* Copy pixmap to window on server */ 2411 XMesaCopyArea( b->xm_visual->display, 2412 b->backxrb->pixmap, /* source drawable */ 2413 b->frontxrb->pixmap, /* dest. drawable */ 2414 b->swapgc, 2415 x, yTop, width, height, /* source region */ 2416 x, yTop /* dest region */ 2417 ); 2418 } 2419 } 2420} 2421 2422 2423/* 2424 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2425 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2426 * back buffer directly. 2427 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2428 * ximage - pointer to back buffer's XImage, or NULL 2429 * Return: GL_TRUE = context is double buffered 2430 * GL_FALSE = context is single buffered 2431 */ 2432GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2433 XMesaPixmap *pixmap, 2434 XMesaImage **ximage ) 2435{ 2436 if (b->db_mode) { 2437 if (pixmap) 2438 *pixmap = b->backxrb->pixmap; 2439 if (ximage) 2440 *ximage = b->backxrb->ximage; 2441 return GL_TRUE; 2442 } 2443 else { 2444 *pixmap = 0; 2445 *ximage = NULL; 2446 return GL_FALSE; 2447 } 2448} 2449 2450 2451/* 2452 * Return the depth buffer associated with an XMesaBuffer. 2453 * Input: b - the XMesa buffer handle 2454 * Output: width, height - size of buffer in pixels 2455 * bytesPerValue - bytes per depth value (2 or 4) 2456 * buffer - pointer to depth buffer values 2457 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2458 */ 2459GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2460 GLint *bytesPerValue, void **buffer ) 2461{ 2462 struct gl_renderbuffer *rb 2463 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2464 if (!rb || !rb->Data) { 2465 *width = 0; 2466 *height = 0; 2467 *bytesPerValue = 0; 2468 *buffer = 0; 2469 return GL_FALSE; 2470 } 2471 else { 2472 *width = b->mesa_buffer.Width; 2473 *height = b->mesa_buffer.Height; 2474 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2475 ? sizeof(GLushort) : sizeof(GLuint); 2476 *buffer = rb->Data; 2477 return GL_TRUE; 2478 } 2479} 2480 2481 2482void XMesaFlush( XMesaContext c ) 2483{ 2484 if (c && c->xm_visual) { 2485#ifdef XFree86Server 2486 /* NOT_NEEDED */ 2487#else 2488 XSync( c->xm_visual->display, False ); 2489#endif 2490 } 2491} 2492 2493 2494 2495const char *XMesaGetString( XMesaContext c, int name ) 2496{ 2497 (void) c; 2498 if (name==XMESA_VERSION) { 2499 return "5.0"; 2500 } 2501 else if (name==XMESA_EXTENSIONS) { 2502 return ""; 2503 } 2504 else { 2505 return NULL; 2506 } 2507} 2508 2509 2510 2511XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2512{ 2513 XMesaBuffer b; 2514 for (b=XMesaBufferList; b; b=b->Next) { 2515 if (b->frontxrb->pixmap==d && b->display==dpy) { 2516 return b; 2517 } 2518 } 2519 return NULL; 2520} 2521 2522 2523 2524/* 2525 * Look for XMesaBuffers whose X window has been destroyed. 2526 * Deallocate any such XMesaBuffers. 2527 */ 2528void XMesaGarbageCollect( void ) 2529{ 2530 XMesaBuffer b, next; 2531 for (b=XMesaBufferList; b; b=next) { 2532 next = b->Next; 2533 if (b->display && b->frontxrb->pixmap && b->type == WINDOW) { 2534#ifdef XFree86Server 2535 /* NOT_NEEDED */ 2536#else 2537 XSync(b->display, False); 2538 if (!window_exists( b->display, b->frontxrb->pixmap )) { 2539 /* found a dead window, free the ancillary info */ 2540 XMesaDestroyBuffer( b ); 2541 } 2542#endif 2543 } 2544 } 2545} 2546 2547 2548void XMesaReset( void ) 2549{ 2550 while (XMesaBufferList) 2551 XMesaDestroyBuffer(XMesaBufferList); 2552 2553 XMesaBufferList = NULL; 2554} 2555 2556 2557unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2558 GLfloat red, GLfloat green, 2559 GLfloat blue, GLfloat alpha ) 2560{ 2561 GLcontext *ctx = &xmesa->mesa; 2562 GLint r = (GLint) (red * 255.0F); 2563 GLint g = (GLint) (green * 255.0F); 2564 GLint b = (GLint) (blue * 255.0F); 2565 GLint a = (GLint) (alpha * 255.0F); 2566 2567 switch (xmesa->pixelformat) { 2568 case PF_Index: 2569 return 0; 2570 case PF_Truecolor: 2571 { 2572 unsigned long p; 2573 PACK_TRUECOLOR( p, r, g, b ); 2574 return p; 2575 } 2576 case PF_8A8B8G8R: 2577 return PACK_8A8B8G8R( r, g, b, a ); 2578 case PF_8A8R8G8B: 2579 return PACK_8A8R8G8B( r, g, b, a ); 2580 case PF_8R8G8B: 2581 return PACK_8R8G8B( r, g, b ); 2582 case PF_5R6G5B: 2583 return PACK_5R6G5B( r, g, b ); 2584 case PF_Dither: 2585 { 2586 DITHER_SETUP; 2587 return DITHER( x, y, r, g, b ); 2588 } 2589 case PF_1Bit: 2590 /* 382 = (3*255)/2 */ 2591 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2592 case PF_HPCR: 2593 return DITHER_HPCR(x, y, r, g, b); 2594 case PF_Lookup: 2595 { 2596 LOOKUP_SETUP; 2597 return LOOKUP( r, g, b ); 2598 } 2599 case PF_Grayscale: 2600 return GRAY_RGB( r, g, b ); 2601 case PF_Dither_5R6G5B: 2602 /* fall through */ 2603 case PF_Dither_True: 2604 { 2605 unsigned long p; 2606 PACK_TRUEDITHER(p, x, y, r, g, b); 2607 return p; 2608 } 2609 default: 2610 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2611 } 2612 return 0; 2613} 2614 2615 2616/* 2617 * This is typically called when the window size changes and we need 2618 * to reallocate the buffer's back/depth/stencil/accum buffers. 2619 */ 2620void XMesaResizeBuffers( XMesaBuffer b ) 2621{ 2622#ifdef XFree86Server 2623 GET_CURRENT_CONTEXT(ctx); 2624 xmesa_resize_buffers(ctx, &(b->mesa_buffer), 0, 0); 2625#else 2626 Window root; 2627 int xpos, ypos; 2628 unsigned int width, height, bw, depth; 2629 GET_CURRENT_CONTEXT(ctx); 2630 XGetGeometry( b->xm_visual->display, b->frontxrb->pixmap, 2631 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2632 xmesa_resize_buffers(ctx, &(b->mesa_buffer), width, height); 2633#endif 2634} 2635 2636