xm_api.c revision ad271b8c98021dc82c0714d768a6642aee10794f
1/* 2 * Mesa 3-D graphics library 3 * Version: 6.5 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 GLboolean swAlpha; 344 345 b->display = vis->display; 346 b->xm_visual = vis; 347 b->type = type; 348 b->cmap = cmap; 349 350 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 351 352 /* Allocate the framebuffer's renderbuffers */ 353 assert(!b->mesa_buffer.Attachment[BUFFER_FRONT_LEFT].Renderbuffer); 354 assert(!b->mesa_buffer.Attachment[BUFFER_BACK_LEFT].Renderbuffer); 355 356 /* front renderbuffer */ 357 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, vis->mesa_visual.rgbMode, 358 GL_FALSE); 359 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 360 &b->frontxrb->Base); 361 362 /* back renderbuffer */ 363 if (vis->mesa_visual.doubleBufferMode) { 364 b->backxrb = xmesa_new_renderbuffer(NULL, 0, 365 vis->mesa_visual.rgbMode, 366 GL_TRUE); 367 /* determine back buffer implementation */ 368 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 369 370 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 371 &b->backxrb->Base); 372 } 373 374 /* determine if we need software alpha planes */ 375 if (vis->mesa_visual.alphaBits > 0 376 && vis->undithered_pf != PF_8A8B8G8R 377 && vis->undithered_pf != PF_8A8R8G8B) { 378 /* Visual has alpha, but pixel format doesn't support it. 379 * We'll use an alpha renderbuffer wrapper. 380 */ 381 swAlpha = GL_TRUE; 382 } 383 else { 384 swAlpha = GL_FALSE; 385 } 386 387 _mesa_add_soft_renderbuffers(&b->mesa_buffer, 388 GL_FALSE, /* color */ 389 vis->mesa_visual.haveDepthBuffer, 390 vis->mesa_visual.haveStencilBuffer, 391 vis->mesa_visual.haveAccumBuffer, 392 swAlpha, 393 vis->mesa_visual.numAuxBuffers > 0 ); 394 395 /* insert into linked list */ 396 b->Next = XMesaBufferList; 397 XMesaBufferList = b; 398 } 399 return b; 400} 401 402 403/* 404 * Find an XMesaBuffer by matching X display and colormap but NOT matching 405 * the notThis buffer. 406 */ 407static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy, 408 XMesaColormap cmap, 409 XMesaBuffer notThis) 410{ 411 XMesaBuffer b; 412 for (b=XMesaBufferList; b; b=b->Next) { 413 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 414 return b; 415 } 416 } 417 return NULL; 418} 419 420 421/* 422 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap 423 * entries. 424 */ 425static void free_xmesa_buffer(int client, XMesaBuffer buffer) 426{ 427 XMesaBuffer prev = NULL, b; 428 (void) client; 429 for (b=XMesaBufferList; b; b=b->Next) { 430 if (b==buffer) { 431 /* unlink bufer from list */ 432 if (prev) 433 prev->Next = buffer->Next; 434 else 435 XMesaBufferList = buffer->Next; 436 /* Check to free X colors */ 437 if (buffer->num_alloced>0) { 438 /* If no other buffer uses this X colormap then free the colors. */ 439 if (!find_xmesa_buffer(buffer->display, buffer->cmap, buffer)) { 440#ifdef XFree86Server 441 (void)FreeColors(buffer->cmap, client, 442 buffer->num_alloced, buffer->alloced_colors, 443 0); 444#else 445 XFreeColors(buffer->display, buffer->cmap, 446 buffer->alloced_colors, buffer->num_alloced, 0); 447#endif 448 } 449 } 450 451 _mesa_free_framebuffer_data(&buffer->mesa_buffer); 452 _mesa_free(buffer); 453 454 return; 455 } 456 /* continue search */ 457 prev = b; 458 } 459 /* buffer not found in XMesaBufferList */ 460 _mesa_problem(NULL,"free_xmesa_buffer() - buffer not found\n"); 461} 462 463 464/* Copy X color table stuff from one XMesaBuffer to another. */ 465static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 466{ 467 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 468 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 469 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 470 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 471 dst->num_alloced = src->num_alloced; 472 MEMCPY(dst->alloced_colors, src->alloced_colors, 473 sizeof(src->alloced_colors)); 474} 475 476 477 478/**********************************************************************/ 479/***** Misc Private Functions *****/ 480/**********************************************************************/ 481 482 483/** 484 * Allocate a shared memory XImage back buffer for the given XMesaBuffer. 485 * Return: GL_TRUE if success, GL_FALSE if error 486 */ 487#ifndef XFree86Server 488static GLboolean 489alloc_shm_back_buffer(XMesaBuffer b, GLuint width, GLuint height) 490{ 491#ifdef USE_XSHM 492 /* 493 * We have to do a _lot_ of error checking here to be sure we can 494 * really use the XSHM extension. It seems different servers trigger 495 * errors at different points if the extension won't work. Therefore 496 * we have to be very careful... 497 */ 498 GC gc; 499 int (*old_handler)( XMesaDisplay *, XErrorEvent * ); 500 501 if (width == 0 || height == 0) { 502 /* this will be true the first time we're called on 'b' */ 503 return GL_FALSE; 504 } 505 506 b->backxrb->ximage = XShmCreateImage(b->xm_visual->display, 507 b->xm_visual->visinfo->visual, 508 b->xm_visual->visinfo->depth, 509 ZPixmap, NULL, &b->shminfo, 510 width, height); 511 if (b->backxrb->ximage == NULL) { 512 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (XShmCreateImage), disabling."); 513 b->shm = 0; 514 return GL_FALSE; 515 } 516 517 b->shminfo.shmid = shmget( IPC_PRIVATE, b->backxrb->ximage->bytes_per_line 518 * b->backxrb->ximage->height, IPC_CREAT|0777 ); 519 if (b->shminfo.shmid < 0) { 520 _mesa_warning(NULL, "shmget failed while allocating back buffer"); 521 XDestroyImage( b->backxrb->ximage ); 522 b->backxrb->ximage = NULL; 523 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmget), disabling."); 524 b->shm = 0; 525 return GL_FALSE; 526 } 527 528 b->shminfo.shmaddr = b->backxrb->ximage->data 529 = (char*)shmat( b->shminfo.shmid, 0, 0 ); 530 if (b->shminfo.shmaddr == (char *) -1) { 531 _mesa_warning(NULL, "shmat() failed while allocating back buffer"); 532 XDestroyImage( b->backxrb->ximage ); 533 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 534 b->backxrb->ximage = NULL; 535 _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmat), disabling."); 536 b->shm = 0; 537 return GL_FALSE; 538 } 539 540 b->shminfo.readOnly = False; 541 mesaXErrorFlag = 0; 542 old_handler = XSetErrorHandler( mesaHandleXError ); 543 /* This may trigger the X protocol error we're ready to catch: */ 544 XShmAttach( b->xm_visual->display, &b->shminfo ); 545 XSync( b->xm_visual->display, False ); 546 547 if (mesaXErrorFlag) { 548 /* we are on a remote display, this error is normal, don't print it */ 549 XFlush( b->xm_visual->display ); 550 mesaXErrorFlag = 0; 551 XDestroyImage( b->backxrb->ximage ); 552 shmdt( b->shminfo.shmaddr ); 553 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 554 b->backxrb->ximage = NULL; 555 b->shm = 0; 556 (void) XSetErrorHandler( old_handler ); 557 return GL_FALSE; 558 } 559 560 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); /* nobody else needs it */ 561 562 /* Finally, try an XShmPutImage to be really sure the extension works */ 563 gc = XCreateGC( b->xm_visual->display, b->frontxrb->drawable, 0, NULL ); 564 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, gc, 565 b->backxrb->ximage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False ); 566 XSync( b->xm_visual->display, False ); 567 XFreeGC( b->xm_visual->display, gc ); 568 (void) XSetErrorHandler( old_handler ); 569 if (mesaXErrorFlag) { 570 XFlush( b->xm_visual->display ); 571 mesaXErrorFlag = 0; 572 XDestroyImage( b->backxrb->ximage ); 573 shmdt( b->shminfo.shmaddr ); 574 shmctl( b->shminfo.shmid, IPC_RMID, 0 ); 575 b->backxrb->ximage = NULL; 576 b->shm = 0; 577 return GL_FALSE; 578 } 579 580 return GL_TRUE; 581#else 582 /* Can't compile XSHM support */ 583 return GL_FALSE; 584#endif 585} 586#endif 587 588 589 590 591/* 592 * Setup an off-screen pixmap or Ximage to use as the back buffer. 593 * Input: b - the X/Mesa buffer 594 */ 595void 596xmesa_alloc_back_buffer( XMesaBuffer b, GLuint width, GLuint height ) 597{ 598 if (width == 0 || height == 0) 599 return; 600 601 if (b->db_mode == BACK_XIMAGE) { 602 /* Deallocate the old backxrb->ximage, if any */ 603 if (b->backxrb->ximage) { 604#if defined(USE_XSHM) && !defined(XFree86Server) 605 if (b->shm) { 606 XShmDetach( b->xm_visual->display, &b->shminfo ); 607 XDestroyImage( b->backxrb->ximage ); 608 shmdt( b->shminfo.shmaddr ); 609 } 610 else 611#endif 612 XMesaDestroyImage( b->backxrb->ximage ); 613 b->backxrb->ximage = NULL; 614 } 615 616 /* Allocate new back buffer */ 617#ifdef XFree86Server 618 /* Allocate a regular XImage for the back buffer. */ 619 b->backxrb->ximage = XMesaCreateImage(b->xm_visual->BitsPerPixel, 620 width, height, NULL); 621 { 622#else 623 if (b->shm == 0 || !alloc_shm_back_buffer(b, width, height)) { 624 /* Allocate a regular XImage for the back buffer. */ 625 b->backxrb->ximage = XCreateImage( b->xm_visual->display, 626 b->xm_visual->visinfo->visual, 627 GET_VISUAL_DEPTH(b->xm_visual), 628 ZPixmap, 0, /* format, offset */ 629 NULL, 630 width, height, 631 8, 0 ); /* pad, bytes_per_line */ 632#endif 633 if (!b->backxrb->ximage) { 634 _mesa_warning(NULL, "alloc_back_buffer: XCreateImage failed."); 635 return; 636 } 637 b->backxrb->ximage->data = (char *) MALLOC( b->backxrb->ximage->height 638 * b->backxrb->ximage->bytes_per_line ); 639 if (!b->backxrb->ximage->data) { 640 _mesa_warning(NULL, "alloc_back_buffer: MALLOC failed."); 641 XMesaDestroyImage( b->backxrb->ximage ); 642 b->backxrb->ximage = NULL; 643 } 644 /* this call just updates the width/origin fields in the xrb */ 645 b->backxrb->Base.AllocStorage(NULL, &b->backxrb->Base, 646 b->backxrb->Base.InternalFormat, 647 b->backxrb->ximage->width, 648 b->backxrb->ximage->height); 649 } 650 b->backxrb->pixmap = None; 651 } 652 else if (b->db_mode == BACK_PIXMAP) { 653 if (!width) 654 width = 1; 655 if (!height) 656 height = 1; 657 658 /* Free the old back pixmap */ 659 if (b->backxrb->pixmap) { 660 XMesaFreePixmap( b->xm_visual->display, b->backxrb->pixmap ); 661 } 662 /* Allocate new back pixmap */ 663 b->backxrb->pixmap = XMesaCreatePixmap( b->xm_visual->display, 664 b->frontxrb->drawable, 665 width, height, 666 GET_VISUAL_DEPTH(b->xm_visual) ); 667 b->backxrb->ximage = NULL; 668 } 669} 670 671 672 673/* 674 * A replacement for XAllocColor. This function should never 675 * fail to allocate a color. When XAllocColor fails, we return 676 * the nearest matching color. If we have to allocate many colors 677 * this function isn't too efficient; the XQueryColors() could be 678 * done just once. 679 * Written by Michael Pichler, Brian Paul, Mark Kilgard 680 * Input: dpy - X display 681 * cmap - X colormap 682 * cmapSize - size of colormap 683 * In/Out: color - the XColor struct 684 * Output: exact - 1=exact color match, 0=closest match 685 * alloced - 1=XAlloc worked, 0=XAlloc failed 686 */ 687static void 688noFaultXAllocColor( int client, 689 XMesaDisplay *dpy, 690 XMesaColormap cmap, 691 int cmapSize, 692 XMesaColor *color, 693 int *exact, int *alloced ) 694{ 695#ifdef XFree86Server 696 Pixel *ppixIn; 697 xrgb *ctable; 698#else 699 /* we'll try to cache ctable for better remote display performance */ 700 static Display *prevDisplay = NULL; 701 static XMesaColormap prevCmap = 0; 702 static int prevCmapSize = 0; 703 static XMesaColor *ctable = NULL; 704#endif 705 XMesaColor subColor; 706 int i, bestmatch; 707 double mindist; /* 3*2^16^2 exceeds long int precision. */ 708 709 (void) client; 710 711 /* First try just using XAllocColor. */ 712#ifdef XFree86Server 713 if (AllocColor(cmap, 714 &color->red, &color->green, &color->blue, 715 &color->pixel, 716 client) == Success) { 717#else 718 if (XAllocColor(dpy, cmap, color)) { 719#endif 720 *exact = 1; 721 *alloced = 1; 722 return; 723 } 724 725 /* Alloc failed, search for closest match */ 726 727 /* Retrieve color table entries. */ 728 /* XXX alloca candidate. */ 729#ifdef XFree86Server 730 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 731 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 732 for (i = 0; i < cmapSize; i++) { 733 ppixIn[i] = i; 734 } 735 QueryColors(cmap, cmapSize, ppixIn, ctable); 736#else 737 if (prevDisplay != dpy || prevCmap != cmap 738 || prevCmapSize != cmapSize || !ctable) { 739 /* free previously cached color table */ 740 if (ctable) 741 _mesa_free(ctable); 742 /* Get the color table from X */ 743 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 744 assert(ctable); 745 for (i = 0; i < cmapSize; i++) { 746 ctable[i].pixel = i; 747 } 748 XQueryColors(dpy, cmap, ctable, cmapSize); 749 prevDisplay = dpy; 750 prevCmap = cmap; 751 prevCmapSize = cmapSize; 752 } 753#endif 754 755 /* Find best match. */ 756 bestmatch = -1; 757 mindist = 0.0; 758 for (i = 0; i < cmapSize; i++) { 759 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 760 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 761 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 762 double dist = dr * dr + dg * dg + db * db; 763 if (bestmatch < 0 || dist < mindist) { 764 bestmatch = i; 765 mindist = dist; 766 } 767 } 768 769 /* Return result. */ 770 subColor.red = ctable[bestmatch].red; 771 subColor.green = ctable[bestmatch].green; 772 subColor.blue = ctable[bestmatch].blue; 773 /* Try to allocate the closest match color. This should only 774 * fail if the cell is read/write. Otherwise, we're incrementing 775 * the cell's reference count. 776 */ 777#ifdef XFree86Server 778 if (AllocColor(cmap, 779 &subColor.red, &subColor.green, &subColor.blue, 780 &subColor.pixel, 781 client) == Success) { 782#else 783 if (XAllocColor(dpy, cmap, &subColor)) { 784#endif 785 *alloced = 1; 786 } 787 else { 788 /* do this to work around a problem reported by Frank Ortega */ 789 subColor.pixel = (unsigned long) bestmatch; 790 subColor.red = ctable[bestmatch].red; 791 subColor.green = ctable[bestmatch].green; 792 subColor.blue = ctable[bestmatch].blue; 793 subColor.flags = DoRed | DoGreen | DoBlue; 794 *alloced = 0; 795 } 796#ifdef XFree86Server 797 _mesa_free(ppixIn); 798 _mesa_free(ctable); 799#else 800 /* don't free table, save it for next time */ 801#endif 802 803 *color = subColor; 804 *exact = 0; 805} 806 807 808 809 810/* 811 * Do setup for PF_GRAYSCALE pixel format. 812 * Note that buffer may be NULL. 813 */ 814static GLboolean setup_grayscale( int client, XMesaVisual v, 815 XMesaBuffer buffer, XMesaColormap cmap ) 816{ 817 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 818 return GL_FALSE; 819 } 820 821 if (buffer) { 822 XMesaBuffer prevBuffer; 823 824 if (!cmap) { 825 return GL_FALSE; 826 } 827 828 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 829 if (prevBuffer && 830 (buffer->xm_visual->mesa_visual.rgbMode == 831 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 832 /* Copy colormap stuff from previous XMesaBuffer which uses same 833 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 834 */ 835 copy_colortable_info(buffer, prevBuffer); 836 } 837 else { 838 /* Allocate 256 shades of gray */ 839 int gray; 840 int colorsfailed = 0; 841 for (gray=0;gray<256;gray++) { 842 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 843 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 844 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 845 int exact, alloced; 846 XMesaColor xcol; 847 xcol.red = (r << 8) | r; 848 xcol.green = (g << 8) | g; 849 xcol.blue = (b << 8) | b; 850 noFaultXAllocColor( client, v->display, 851 cmap, GET_COLORMAP_SIZE(v), 852 &xcol, &exact, &alloced ); 853 if (!exact) { 854 colorsfailed++; 855 } 856 if (alloced) { 857 assert(buffer->num_alloced<256); 858 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 859 buffer->num_alloced++; 860 } 861 862 /*OLD 863 assert(gray < 576); 864 buffer->color_table[gray*3+0] = xcol.pixel; 865 buffer->color_table[gray*3+1] = xcol.pixel; 866 buffer->color_table[gray*3+2] = xcol.pixel; 867 assert(xcol.pixel < 65536); 868 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 869 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 870 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 871 */ 872 buffer->color_table[gray] = xcol.pixel; 873 assert(xcol.pixel < 65536); 874 buffer->pixel_to_r[xcol.pixel] = gray; 875 buffer->pixel_to_g[xcol.pixel] = gray; 876 buffer->pixel_to_b[xcol.pixel] = gray; 877 } 878 879 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 880 _mesa_warning(NULL, 881 "Note: %d out of 256 needed colors do not match exactly.\n", 882 colorsfailed ); 883 } 884 } 885 } 886 887 v->dithered_pf = PF_Grayscale; 888 v->undithered_pf = PF_Grayscale; 889 return GL_TRUE; 890} 891 892 893 894/* 895 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 896 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 897 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 898 * color. While this function was originally designed just for 8-bit 899 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 900 * Dithering code contributed by Bob Mercier. 901 */ 902static GLboolean setup_dithered_color( int client, XMesaVisual v, 903 XMesaBuffer buffer, XMesaColormap cmap ) 904{ 905 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 906 return GL_FALSE; 907 } 908 909 if (buffer) { 910 XMesaBuffer prevBuffer; 911 912 if (!cmap) { 913 return GL_FALSE; 914 } 915 916 prevBuffer = find_xmesa_buffer(v->display, cmap, buffer); 917 if (prevBuffer && 918 (buffer->xm_visual->mesa_visual.rgbMode == 919 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 920 /* Copy colormap stuff from previous, matching XMesaBuffer. 921 * Do this to avoid time spent in noFaultXAllocColor. 922 */ 923 copy_colortable_info(buffer, prevBuffer); 924 } 925 else { 926 /* Allocate X colors and initialize color_table[], red_table[], etc */ 927 int r, g, b, i; 928 int colorsfailed = 0; 929 for (r = 0; r < DITH_R; r++) { 930 for (g = 0; g < DITH_G; g++) { 931 for (b = 0; b < DITH_B; b++) { 932 XMesaColor xcol; 933 int exact, alloced; 934 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 935 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 936 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 937 noFaultXAllocColor( client, v->display, 938 cmap, GET_COLORMAP_SIZE(v), 939 &xcol, &exact, &alloced ); 940 if (!exact) { 941 colorsfailed++; 942 } 943 if (alloced) { 944 assert(buffer->num_alloced<256); 945 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 946 buffer->num_alloced++; 947 } 948 i = DITH_MIX( r, g, b ); 949 assert(i < 576); 950 buffer->color_table[i] = xcol.pixel; 951 assert(xcol.pixel < 65536); 952 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 953 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 954 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 955 } 956 } 957 } 958 959 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 960 _mesa_warning(NULL, 961 "Note: %d out of %d needed colors do not match exactly.\n", 962 colorsfailed, DITH_R * DITH_G * DITH_B ); 963 } 964 } 965 } 966 967 v->dithered_pf = PF_Dither; 968 v->undithered_pf = PF_Lookup; 969 return GL_TRUE; 970} 971 972 973/* 974 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 975 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 976 * Special dithering tables have to be initialized. 977 */ 978static void setup_8bit_hpcr( XMesaVisual v ) 979{ 980 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 981 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 982 * on the root window AND the colormap obtainable by XGetRGBColormaps 983 * for that atom must be set on the window. (see also tkInitWindow) 984 * If that colormap is not set, the output will look stripy. 985 */ 986 987 /* Setup color tables with gamma correction */ 988 int i; 989 double g; 990 991 g = 1.0 / v->RedGamma; 992 for (i=0; i<256; i++) { 993 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 994 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 995 } 996 997 g = 1.0 / v->GreenGamma; 998 for (i=0; i<256; i++) { 999 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 1000 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 1001 } 1002 1003 g = 1.0 / v->BlueGamma; 1004 for (i=0; i<256; i++) { 1005 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 1006 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 1007 } 1008 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 1009 v->dithered_pf = PF_HPCR; 1010 1011 /* which method should I use to clear */ 1012 /* GL_FALSE: keep the ordinary method */ 1013 /* GL_TRUE : clear with dither pattern */ 1014 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 1015 1016 if (v->hpcr_clear_flag) { 1017 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 1018 DefaultRootWindow(v->display), 1019 16, 2, 8); 1020#ifndef XFree86Server 1021 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 1022 0, 0, 16, 2, AllPlanes, ZPixmap); 1023#endif 1024 } 1025} 1026 1027 1028/* 1029 * Setup RGB rendering for a window with a True/DirectColor visual. 1030 */ 1031static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer, 1032 XMesaColormap cmap ) 1033{ 1034 unsigned long rmask, gmask, bmask; 1035 (void) buffer; 1036 (void) cmap; 1037 1038 /* Compute red multiplier (mask) and bit shift */ 1039 v->rshift = 0; 1040 rmask = GET_REDMASK(v); 1041 while ((rmask & 1)==0) { 1042 v->rshift++; 1043 rmask = rmask >> 1; 1044 } 1045 1046 /* Compute green multiplier (mask) and bit shift */ 1047 v->gshift = 0; 1048 gmask = GET_GREENMASK(v); 1049 while ((gmask & 1)==0) { 1050 v->gshift++; 1051 gmask = gmask >> 1; 1052 } 1053 1054 /* Compute blue multiplier (mask) and bit shift */ 1055 v->bshift = 0; 1056 bmask = GET_BLUEMASK(v); 1057 while ((bmask & 1)==0) { 1058 v->bshift++; 1059 bmask = bmask >> 1; 1060 } 1061 1062 /* 1063 * Compute component-to-pixel lookup tables and dithering kernel 1064 */ 1065 { 1066 static GLubyte kernel[16] = { 1067 0*16, 8*16, 2*16, 10*16, 1068 12*16, 4*16, 14*16, 6*16, 1069 3*16, 11*16, 1*16, 9*16, 1070 15*16, 7*16, 13*16, 5*16, 1071 }; 1072 GLint rBits = _mesa_bitcount(rmask); 1073 GLint gBits = _mesa_bitcount(gmask); 1074 GLint bBits = _mesa_bitcount(bmask); 1075 GLint maxBits; 1076 GLuint i; 1077 1078 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 1079 for (i=0; i<=rmask; i++) 1080 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 1081 for (i=0; i<=gmask; i++) 1082 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 1083 for (i=0; i<=bmask; i++) 1084 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 1085 1086 /* convert RGB values from [0,255] to pixel components */ 1087 1088 for (i=0;i<256;i++) { 1089 GLint r = gamma_adjust(v->RedGamma, i, 255); 1090 GLint g = gamma_adjust(v->GreenGamma, i, 255); 1091 GLint b = gamma_adjust(v->BlueGamma, i, 255); 1092 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 1093 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 1094 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 1095 } 1096 /* overflow protection */ 1097 for (i=256;i<512;i++) { 1098 v->RtoPixel[i] = v->RtoPixel[255]; 1099 v->GtoPixel[i] = v->GtoPixel[255]; 1100 v->BtoPixel[i] = v->BtoPixel[255]; 1101 } 1102 1103 /* setup dithering kernel */ 1104 maxBits = rBits; 1105 if (gBits > maxBits) maxBits = gBits; 1106 if (bBits > maxBits) maxBits = bBits; 1107 for (i=0;i<16;i++) { 1108 v->Kernel[i] = kernel[i] >> maxBits; 1109 } 1110 1111 v->undithered_pf = PF_Truecolor; 1112 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 1113 } 1114 1115 /* 1116 * Now check for TrueColor visuals which we can optimize. 1117 */ 1118 if ( GET_REDMASK(v) ==0x0000ff 1119 && GET_GREENMASK(v)==0x00ff00 1120 && GET_BLUEMASK(v) ==0xff0000 1121 && CHECK_BYTE_ORDER(v) 1122 && v->BitsPerPixel==32 1123 && sizeof(GLuint)==4 1124 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1125 /* common 32 bpp config used on SGI, Sun */ 1126 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; 1127 } 1128 else if (GET_REDMASK(v) ==0xff0000 1129 && GET_GREENMASK(v)==0x00ff00 1130 && GET_BLUEMASK(v) ==0x0000ff 1131 && CHECK_BYTE_ORDER(v) 1132 && v->BitsPerPixel==32 1133 && sizeof(GLuint)==4 1134 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1135 /* common 32 bpp config used on Linux, HP, IBM */ 1136 if (GET_VISUAL_DEPTH(v)==32) 1137 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; 1138 else 1139 v->undithered_pf = v->dithered_pf = PF_8R8G8B; 1140 } 1141 else if (GET_REDMASK(v) ==0xff0000 1142 && GET_GREENMASK(v)==0x00ff00 1143 && GET_BLUEMASK(v) ==0x0000ff 1144 && CHECK_BYTE_ORDER(v) 1145 && v->BitsPerPixel==24 1146 && sizeof(GLuint)==4 1147 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1148 /* common packed 24 bpp config used on Linux */ 1149 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; 1150 } 1151 else if (GET_REDMASK(v) ==0xf800 1152 && GET_GREENMASK(v)==0x07e0 1153 && GET_BLUEMASK(v) ==0x001f 1154 && CHECK_BYTE_ORDER(v) 1155 && v->BitsPerPixel==16 1156 && sizeof(GLushort)==2 1157 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 1158 /* 5-6-5 color weight on common PC VGA boards */ 1159 v->undithered_pf = PF_5R6G5B; 1160 v->dithered_pf = PF_Dither_5R6G5B; 1161 } 1162 else if (GET_REDMASK(v) ==0xe0 1163 && GET_GREENMASK(v)==0x1c 1164 && GET_BLUEMASK(v) ==0x03 1165 && CHECK_FOR_HPCR(v)) { 1166 setup_8bit_hpcr( v ); 1167 } 1168} 1169 1170 1171 1172/* 1173 * Setup RGB rendering for a window with a monochrome visual. 1174 */ 1175static void setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1176{ 1177 (void) b; 1178 v->dithered_pf = v->undithered_pf = PF_1Bit; 1179 /* if black=1 then we must flip pixel values */ 1180 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1181} 1182 1183 1184 1185/* 1186 * When a context is "made current" for the first time, we can finally 1187 * finish initializing the context's visual and buffer information. 1188 * Input: v - the XMesaVisual to initialize 1189 * b - the XMesaBuffer to initialize (may be NULL) 1190 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode 1191 * window - the window/pixmap we're rendering into 1192 * cmap - the colormap associated with the window/pixmap 1193 * Return: GL_TRUE=success, GL_FALSE=failure 1194 */ 1195static GLboolean initialize_visual_and_buffer( int client, 1196 XMesaVisual v, 1197 XMesaBuffer b, 1198 GLboolean rgb_flag, 1199 XMesaDrawable window, 1200 XMesaColormap cmap ) 1201{ 1202 struct xmesa_renderbuffer *front_xrb, *back_xrb; 1203#ifndef XFree86Server 1204 XGCValues gcvalues; 1205#endif 1206 1207 if (b) { 1208 assert(b->xm_visual == v); 1209 } 1210 1211 if (b) { 1212 front_xrb = b->frontxrb; 1213 back_xrb = b->backxrb; 1214 } 1215 else { 1216 front_xrb = back_xrb = NULL; 1217 } 1218 1219 /* Save true bits/pixel */ 1220 v->BitsPerPixel = bits_per_pixel(v); 1221 assert(v->BitsPerPixel > 0); 1222 1223 1224 if (rgb_flag==GL_FALSE) { 1225 /* COLOR-INDEXED WINDOW: 1226 * Even if the visual is TrueColor or DirectColor we treat it as 1227 * being color indexed. This is weird but might be useful to someone. 1228 */ 1229 v->dithered_pf = v->undithered_pf = PF_Index; 1230 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1231 } 1232 else { 1233 /* RGB WINDOW: 1234 * We support RGB rendering into almost any kind of visual. 1235 */ 1236 const int xclass = v->mesa_visual.visualType; 1237 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1238 setup_truecolor( v, b, cmap ); 1239 } 1240 else if (xclass==GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v)==1) { 1241 setup_monochrome( v, b ); 1242 } 1243 else if (xclass==GLX_GRAY_SCALE || xclass==GLX_STATIC_GRAY) { 1244 if (!setup_grayscale( client, v, b, cmap )) { 1245 return GL_FALSE; 1246 } 1247 } 1248 else if ((xclass==GLX_PSEUDO_COLOR || xclass==GLX_STATIC_COLOR) 1249 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1250 if (!setup_dithered_color( client, v, b, cmap )) { 1251 return GL_FALSE; 1252 } 1253 } 1254 else { 1255 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual."); 1256 return GL_FALSE; 1257 } 1258 v->mesa_visual.indexBits = 0; 1259 1260 if (_mesa_getenv("MESA_NO_DITHER")) { 1261 v->dithered_pf = v->undithered_pf; 1262 } 1263 } 1264 1265 1266 /* 1267 * If MESA_INFO env var is set print out some debugging info 1268 * which can help Brian figure out what's going on when a user 1269 * reports bugs. 1270 */ 1271 if (_mesa_getenv("MESA_INFO")) { 1272 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1273 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1274 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1275 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1276 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1277 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1278 } 1279 1280 if (b && window) { 1281 /* Do window-specific initializations */ 1282 1283 b->frontxrb->drawable = window; 1284 b->frontxrb->pixmap = (XMesaPixmap) window; 1285 1286 /* Setup for single/double buffering */ 1287 if (v->mesa_visual.doubleBufferMode) { 1288 /* Double buffered */ 1289 b->shm = check_for_xshm( v->display ); 1290 xmesa_alloc_back_buffer(b, b->mesa_buffer.Width, b->mesa_buffer.Height); 1291 } 1292 1293 /* X11 graphics contexts */ 1294#ifdef XFree86Server 1295 b->gc = CreateScratchGC(v->display, window->depth); 1296#else 1297 b->gc = XCreateGC( v->display, window, 0, NULL ); 1298#endif 1299 XMesaSetFunction( v->display, b->gc, GXcopy ); 1300 1301 /* cleargc - for glClear() */ 1302#ifdef XFree86Server 1303 b->cleargc = CreateScratchGC(v->display, window->depth); 1304#else 1305 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1306#endif 1307 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1308 1309 /* 1310 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1311 * Patch contributed by Michael Pichler May 15, 1995. 1312 */ 1313#ifdef XFree86Server 1314 b->swapgc = CreateScratchGC(v->display, window->depth); 1315 { 1316 CARD32 v[1]; 1317 v[0] = FALSE; 1318 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1319 } 1320#else 1321 gcvalues.graphics_exposures = False; 1322 b->swapgc = XCreateGC( v->display, window, 1323 GCGraphicsExposures, &gcvalues); 1324#endif 1325 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1326 /* 1327 * Set fill style and tile pixmap once for all for HPCR stuff 1328 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1329 * Initialize whole stuff 1330 * Patch contributed by Jacques Leroy March 8, 1998. 1331 */ 1332 if (v->hpcr_clear_flag && back_xrb->pixmap) { 1333 int i; 1334 for (i=0; i<16; i++) 1335 { 1336 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1337 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1338 } 1339 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1340 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1341 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1342 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1343 } 1344 1345 /* Initialize the row buffer XImage for use in write_color_span() */ 1346#ifdef XFree86Server 1347 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1348 (char *)MALLOC(MAX_WIDTH*4)); 1349#else 1350 b->rowimage = XCreateImage( v->display, 1351 v->visinfo->visual, 1352 v->visinfo->depth, 1353 ZPixmap, 0, /*format, offset*/ 1354 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1355 MAX_WIDTH, 1, /*width, height*/ 1356 32, /*bitmap_pad*/ 1357 0 /*bytes_per_line*/ ); 1358#endif 1359 if (!b->rowimage) 1360 return GL_FALSE; 1361 } 1362 1363 return GL_TRUE; 1364} 1365 1366 1367 1368/* 1369 * Convert an RGBA color to a pixel value. 1370 */ 1371unsigned long 1372xmesa_color_to_pixel(GLcontext *ctx, 1373 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1374 GLuint pixelFormat) 1375{ 1376 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1377 switch (pixelFormat) { 1378 case PF_Index: 1379 return 0; 1380 case PF_Truecolor: 1381 { 1382 unsigned long p; 1383 PACK_TRUECOLOR( p, r, g, b ); 1384 return p; 1385 } 1386 case PF_8A8B8G8R: 1387 return PACK_8A8B8G8R( r, g, b, a ); 1388 case PF_8A8R8G8B: 1389 return PACK_8A8R8G8B( r, g, b, a ); 1390 case PF_8R8G8B: 1391 /* fall through */ 1392 case PF_8R8G8B24: 1393 return PACK_8R8G8B( r, g, b ); 1394 case PF_5R6G5B: 1395 return PACK_5R6G5B( r, g, b ); 1396 case PF_Dither: 1397 { 1398 DITHER_SETUP; 1399 return DITHER( 1, 0, r, g, b ); 1400 } 1401 case PF_1Bit: 1402 /* 382 = (3*255)/2 */ 1403 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1404 case PF_HPCR: 1405 return DITHER_HPCR(1, 1, r, g, b); 1406 case PF_Lookup: 1407 { 1408 LOOKUP_SETUP; 1409 return LOOKUP( r, g, b ); 1410 } 1411 case PF_Grayscale: 1412 return GRAY_RGB( r, g, b ); 1413 case PF_Dither_True: 1414 /* fall through */ 1415 case PF_Dither_5R6G5B: 1416 { 1417 unsigned long p; 1418 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1419 return p; 1420 } 1421 default: 1422 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1423 } 1424 return 0; 1425} 1426 1427 1428#define NUM_VISUAL_TYPES 6 1429 1430/** 1431 * Convert an X visual type to a GLX visual type. 1432 * 1433 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1434 * to be converted. 1435 * \return If \c visualType is a valid X visual type, a GLX visual type will 1436 * be returned. Otherwise \c GLX_NONE will be returned. 1437 * 1438 * \note 1439 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1440 * DRI CVS tree. 1441 */ 1442static GLint 1443xmesa_convert_from_x_visual_type( int visualType ) 1444{ 1445 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1446 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1447 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1448 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1449 }; 1450 1451 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1452 ? glx_visual_types[ visualType ] : GLX_NONE; 1453} 1454 1455 1456/**********************************************************************/ 1457/***** Public Functions *****/ 1458/**********************************************************************/ 1459 1460 1461/* 1462 * Create a new X/Mesa visual. 1463 * Input: display - X11 display 1464 * visinfo - an XVisualInfo pointer 1465 * rgb_flag - GL_TRUE = RGB mode, 1466 * GL_FALSE = color index mode 1467 * alpha_flag - alpha buffer requested? 1468 * db_flag - GL_TRUE = double-buffered, 1469 * GL_FALSE = single buffered 1470 * stereo_flag - stereo visual? 1471 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1472 * GL_FALSE = use an off-screen pixmap for back buffer 1473 * depth_size - requested bits/depth values, or zero 1474 * stencil_size - requested bits/stencil values, or zero 1475 * accum_red_size - requested bits/red accum values, or zero 1476 * accum_green_size - requested bits/green accum values, or zero 1477 * accum_blue_size - requested bits/blue accum values, or zero 1478 * accum_alpha_size - requested bits/alpha accum values, or zero 1479 * num_samples - number of samples/pixel if multisampling, or zero 1480 * level - visual level, usually 0 1481 * visualCaveat - ala the GLX extension, usually GLX_NONE 1482 * Return; a new XMesaVisual or 0 if error. 1483 */ 1484XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1485 XMesaVisualInfo visinfo, 1486 GLboolean rgb_flag, 1487 GLboolean alpha_flag, 1488 GLboolean db_flag, 1489 GLboolean stereo_flag, 1490 GLboolean ximage_flag, 1491 GLint depth_size, 1492 GLint stencil_size, 1493 GLint accum_red_size, 1494 GLint accum_green_size, 1495 GLint accum_blue_size, 1496 GLint accum_alpha_size, 1497 GLint num_samples, 1498 GLint level, 1499 GLint visualCaveat ) 1500{ 1501 char *gamma; 1502 XMesaVisual v; 1503 GLint red_bits, green_bits, blue_bits, alpha_bits; 1504 1505 /* For debugging only */ 1506 if (_mesa_getenv("MESA_XSYNC")) { 1507 /* This makes debugging X easier. 1508 * In your debugger, set a breakpoint on _XError to stop when an 1509 * X protocol error is generated. 1510 */ 1511#ifdef XFree86Server 1512 /* NOT_NEEDED */ 1513#else 1514 XSynchronize( display, 1 ); 1515#endif 1516 } 1517 1518 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1519 if (!v) { 1520 return NULL; 1521 } 1522 1523 /* 1524 * In the X server, NULL is passed in for the display. It will have 1525 * to be set before using this visual. See XMesaSetVisualDisplay() 1526 * below. 1527 */ 1528 v->display = display; 1529 1530 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 1531 * the struct but we may need some of the information contained in it 1532 * at a later time. 1533 */ 1534#ifndef XFree86Server 1535 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1536 if(!v->visinfo) { 1537 _mesa_free(v); 1538 return NULL; 1539 } 1540 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1541#endif 1542 1543 /* check for MESA_GAMMA environment variable */ 1544 gamma = _mesa_getenv("MESA_GAMMA"); 1545 if (gamma) { 1546 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1547 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1548 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1549 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1550 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1551 } 1552 else { 1553 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1554 } 1555 1556 v->ximage_flag = ximage_flag; 1557 1558#ifdef XFree86Server 1559 /* We could calculate these values by ourselves. nplanes is either the sum 1560 * of the red, green, and blue bits or the number index bits. 1561 * ColormapEntries is either (1U << index_bits) or 1562 * (1U << max(redBits, greenBits, blueBits)). 1563 */ 1564 v->nplanes = visinfo->nplanes; 1565 v->ColormapEntries = visinfo->ColormapEntries; 1566 1567 v->mesa_visual.redMask = visinfo->redMask; 1568 v->mesa_visual.greenMask = visinfo->greenMask; 1569 v->mesa_visual.blueMask = visinfo->blueMask; 1570 v->mesa_visual.visualID = visinfo->vid; 1571 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1572#else 1573 v->mesa_visual.redMask = visinfo->red_mask; 1574 v->mesa_visual.greenMask = visinfo->green_mask; 1575 v->mesa_visual.blueMask = visinfo->blue_mask; 1576 v->mesa_visual.visualID = visinfo->visualid; 1577 v->mesa_visual.screen = visinfo->screen; 1578#endif 1579 1580#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1581 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1582#else 1583 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1584#endif 1585 1586 v->mesa_visual.visualRating = visualCaveat; 1587 1588 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1589 1590 { 1591 const int xclass = v->mesa_visual.visualType; 1592 if (xclass==GLX_TRUE_COLOR || xclass==GLX_DIRECT_COLOR) { 1593 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1594 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1595 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1596 alpha_bits = 0; 1597 } 1598 else { 1599 /* this is an approximation */ 1600 int depth; 1601 depth = GET_VISUAL_DEPTH(v); 1602 red_bits = depth / 3; 1603 depth -= red_bits; 1604 green_bits = depth / 2; 1605 depth -= green_bits; 1606 blue_bits = depth; 1607 alpha_bits = 0; 1608 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1609 } 1610 } 1611 1612 if (alpha_flag && alpha_bits == 0) 1613 alpha_bits = 8; 1614 1615 _mesa_initialize_visual( &v->mesa_visual, 1616 rgb_flag, db_flag, stereo_flag, 1617 red_bits, green_bits, 1618 blue_bits, alpha_bits, 1619 v->mesa_visual.indexBits, 1620 depth_size, 1621 stencil_size, 1622 accum_red_size, accum_green_size, 1623 accum_blue_size, accum_alpha_size, 1624 0 ); 1625 1626 /* XXX minor hack */ 1627 v->mesa_visual.level = level; 1628 return v; 1629} 1630 1631 1632void XMesaSetVisualDisplay( XMesaDisplay *dpy, XMesaVisual v ) 1633{ 1634 v->display = dpy; 1635} 1636 1637 1638void XMesaDestroyVisual( XMesaVisual v ) 1639{ 1640#ifndef XFree86Server 1641 _mesa_free(v->visinfo); 1642#endif 1643 _mesa_free(v); 1644} 1645 1646 1647 1648/** 1649 * Create a new XMesaContext. 1650 * \param v the XMesaVisual 1651 * \param share_list another XMesaContext with which to share display 1652 * lists or NULL if no sharing is wanted. 1653 * \return an XMesaContext or NULL if error. 1654 */ 1655XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1656{ 1657 static GLboolean firstTime = GL_TRUE; 1658 XMesaContext c; 1659 GLcontext *mesaCtx; 1660 struct dd_function_table functions; 1661 TNLcontext *tnl; 1662 1663 if (firstTime) { 1664 _glthread_INIT_MUTEX(_xmesa_lock); 1665 firstTime = GL_FALSE; 1666 } 1667 1668 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1669 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1670 if (!c) 1671 return NULL; 1672 1673 mesaCtx = &(c->mesa); 1674 1675 /* initialize with default driver functions, then plug in XMesa funcs */ 1676 _mesa_init_driver_functions(&functions); 1677 xmesa_init_driver_functions(v, &functions); 1678 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1679 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1680 &functions, (void *) c)) { 1681 _mesa_free(c); 1682 return NULL; 1683 } 1684 1685 _mesa_enable_sw_extensions(mesaCtx); 1686 _mesa_enable_1_3_extensions(mesaCtx); 1687 _mesa_enable_1_4_extensions(mesaCtx); 1688 _mesa_enable_1_5_extensions(mesaCtx); 1689 _mesa_enable_2_0_extensions(mesaCtx); 1690#if ENABLE_EXT_texure_compression_s3tc 1691 if (c->Mesa_DXTn) { 1692 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1693 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1694 } 1695 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1696#endif 1697#if ENABLE_EXT_timer_query 1698 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1699#endif 1700 1701 /* finish up xmesa context initializations */ 1702 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1703 c->xm_visual = v; 1704 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1705 c->display = v->display; 1706 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1707 1708 /* Initialize the software rasterizer and helper modules. 1709 */ 1710 if (!_swrast_CreateContext( mesaCtx ) || 1711 !_ac_CreateContext( mesaCtx ) || 1712 !_tnl_CreateContext( mesaCtx ) || 1713 !_swsetup_CreateContext( mesaCtx )) { 1714 _mesa_free_context_data(&c->mesa); 1715 _mesa_free(c); 1716 return NULL; 1717 } 1718 1719 /* tnl setup */ 1720 tnl = TNL_CONTEXT(mesaCtx); 1721 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1722 /* swrast setup */ 1723 xmesa_register_swrast_functions( mesaCtx ); 1724 _swsetup_Wakeup(mesaCtx); 1725 1726 return c; 1727} 1728 1729 1730 1731void XMesaDestroyContext( XMesaContext c ) 1732{ 1733 GLcontext *mesaCtx = &c->mesa; 1734#ifdef FX 1735 XMesaBuffer xmbuf = XMESA_BUFFER(mesaCtx->DrawBuffer); 1736 1737 if (xmbuf && xmbuf->FXctx) 1738 fxMesaDestroyContext(xmbuf->FXctx); 1739#endif 1740 _swsetup_DestroyContext( mesaCtx ); 1741 _swrast_DestroyContext( mesaCtx ); 1742 _tnl_DestroyContext( mesaCtx ); 1743 _ac_DestroyContext( mesaCtx ); 1744 _mesa_free_context_data( mesaCtx ); 1745 _mesa_free( c ); 1746} 1747 1748 1749 1750/* 1751 * XXX this isn't a public function! It's a hack for the 3Dfx driver. 1752 * Create a new XMesaBuffer from an X window. 1753 * Input: v - the XMesaVisual 1754 * w - the window 1755 * c - the context 1756 * Return: new XMesaBuffer or NULL if error 1757 */ 1758XMesaBuffer 1759XMesaCreateWindowBuffer2(XMesaVisual v, XMesaWindow w, XMesaContext c) 1760{ 1761#ifndef XFree86Server 1762 XWindowAttributes attr; 1763#endif 1764#ifdef FX 1765 char *fxEnvVar; 1766#endif 1767 int client = 0; 1768 XMesaBuffer b; 1769 XMesaColormap cmap; 1770 1771 assert(v); 1772 (void) c; 1773 1774 /* Check that window depth matches visual depth */ 1775#ifdef XFree86Server 1776 client = CLIENT_ID(((XMesaDrawable)w)->id); 1777 1778 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1779 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1780 GET_VISUAL_DEPTH(v), ((XMesaDrawable) w)->depth); 1781 return NULL; 1782 } 1783#else 1784 XGetWindowAttributes( v->display, w, &attr ); 1785 1786 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1787 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1788 GET_VISUAL_DEPTH(v), attr.depth); 1789 return NULL; 1790 } 1791#endif 1792 1793 /* Find colormap */ 1794#ifdef XFree86Server 1795 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1796#else 1797 if (attr.colormap) { 1798 cmap = attr.colormap; 1799 } 1800 else { 1801 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1802 /* this is weird, a window w/out a colormap!? */ 1803 /* OK, let's just allocate a new one and hope for the best */ 1804 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1805 } 1806#endif 1807 1808 b = alloc_xmesa_buffer(v, WINDOW, cmap); 1809 if (!b) { 1810 return NULL; 1811 } 1812 1813 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1814 (XMesaDrawable) w, cmap )) { 1815 free_xmesa_buffer(client, b); 1816 return NULL; 1817 } 1818 1819#ifdef FX 1820 fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1821 if (fxEnvVar) { 1822 if (fxEnvVar[0]!='d') { 1823 int attribs[100]; 1824 int numAttribs = 0; 1825 int hw; 1826 if (v->mesa_visual.depthBits > 0) { 1827 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1828 attribs[numAttribs++] = v->mesa_visual.depthBits; 1829 } 1830 if (v->mesa_visual.doubleBufferMode) { 1831 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1832 } 1833 if (v->mesa_visual.accumRedBits > 0) { 1834 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1835 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1836 } 1837 if (v->mesa_visual.stencilBits > 0) { 1838 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1839 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1840 } 1841 if (v->mesa_visual.alphaBits > 0) { 1842 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1843 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1844 } 1845 if (1) { 1846 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1847 attribs[numAttribs++] = (int) &(c->mesa); 1848 } 1849 attribs[numAttribs++] = FXMESA_NONE; 1850 1851 /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ 1852 hw = fxMesaSelectCurrentBoard(0); 1853 1854 /* if these fail, there's a new bug somewhere */ 1855 ASSERT(b->mesa_buffer.Width > 0); 1856 ASSERT(b->mesa_buffer.Height > 0); 1857 1858 if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) { 1859 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1860 b->mesa_buffer.Height, attribs); 1861 if ((v->undithered_pf!=PF_Index) && (b->backxrb->ximage)) { 1862 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1863 if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) { 1864 b->FXwindowHack = GL_TRUE; 1865 FX_grSstControl(GR_CONTROL_DEACTIVATE); 1866 } 1867 else { 1868 b->FXwindowHack = GL_FALSE; 1869 } 1870 } 1871 } 1872 else { 1873 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1874 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1875 GR_REFRESH_75Hz, attribs); 1876 else 1877 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1878 b->mesa_buffer.Height, attribs); 1879 b->FXisHackUsable = GL_FALSE; 1880 b->FXwindowHack = GL_FALSE; 1881 } 1882 /* 1883 fprintf(stderr, 1884 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1885 hw, b->mesa_buffer.Width, b->mesa_buffer.Height, 1886 b->FXisHackUsable, b->FXwindowHack); 1887 */ 1888 } 1889 } 1890 else { 1891 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1892 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1893 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1894 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1895 } 1896#endif 1897 1898 return b; 1899} 1900 1901 1902XMesaBuffer 1903XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1904{ 1905 return XMesaCreateWindowBuffer2( v, w, NULL ); 1906} 1907 1908 1909/** 1910 * Create a new XMesaBuffer from an X pixmap. 1911 * 1912 * \param v the XMesaVisual 1913 * \param p the pixmap 1914 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1915 * \c GLX_DIRECT_COLOR visual for the pixmap 1916 * \returns new XMesaBuffer or NULL if error 1917 */ 1918XMesaBuffer 1919XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1920{ 1921 int client = 0; 1922 XMesaBuffer b; 1923 1924 assert(v); 1925 1926 b = alloc_xmesa_buffer(v, PIXMAP, cmap); 1927 if (!b) { 1928 return NULL; 1929 } 1930 1931#ifdef XFree86Server 1932 client = CLIENT_ID(((XMesaDrawable)p)->id); 1933#endif 1934 1935 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1936 (XMesaDrawable) p, cmap)) { 1937 free_xmesa_buffer(client, b); 1938 return NULL; 1939 } 1940 1941 return b; 1942} 1943 1944 1945 1946XMesaBuffer 1947XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1948 unsigned int width, unsigned int height) 1949{ 1950#ifdef XFree86Server 1951 return 0; 1952#else 1953 int client = 0; 1954 XMesaWindow root; 1955 XMesaDrawable drawable; /* X Pixmap Drawable */ 1956 XMesaBuffer b; 1957 1958 b = alloc_xmesa_buffer(v, PBUFFER, cmap); 1959 if (!b) { 1960 return NULL; 1961 } 1962 1963 /* allocate pixmap for front buffer */ 1964 root = RootWindow( v->display, v->visinfo->screen ); 1965 drawable = XCreatePixmap( v->display, root, width, height, v->visinfo->depth ); 1966 1967 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1968 drawable, cmap)) { 1969 free_xmesa_buffer(client, b); 1970 return NULL; 1971 } 1972 1973 return b; 1974#endif 1975} 1976 1977 1978 1979/* 1980 * Deallocate an XMesaBuffer structure and all related info. 1981 */ 1982void XMesaDestroyBuffer( XMesaBuffer b ) 1983{ 1984 int client = 0; 1985 1986#ifdef XFree86Server 1987 if (b->frontxrb->drawable) 1988 client = CLIENT_ID(b->frontxrb->drawable->id); 1989#endif 1990 1991 if (b->gc) XMesaFreeGC( b->xm_visual->display, b->gc ); 1992 if (b->cleargc) XMesaFreeGC( b->xm_visual->display, b->cleargc ); 1993 if (b->swapgc) XMesaFreeGC( b->xm_visual->display, b->swapgc ); 1994 1995 if (b->xm_visual->mesa_visual.doubleBufferMode) 1996 { 1997 if (b->backxrb->ximage) { 1998#if defined(USE_XSHM) && !defined(XFree86Server) 1999 if (b->shm) { 2000 XShmDetach( b->xm_visual->display, &b->shminfo ); 2001 XDestroyImage( b->backxrb->ximage ); 2002 shmdt( b->shminfo.shmaddr ); 2003 } 2004 else 2005#endif 2006 XMesaDestroyImage( b->backxrb->ximage ); 2007 } 2008 if (b->backxrb->pixmap) { 2009 XMesaFreePixmap( b->xm_visual->display, b->backxrb->pixmap ); 2010 if (b->xm_visual->hpcr_clear_flag) { 2011 XMesaFreePixmap( b->xm_visual->display, 2012 b->xm_visual->hpcr_clear_pixmap ); 2013 XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage ); 2014 } 2015 } 2016 } 2017 if (b->rowimage) { 2018 _mesa_free( b->rowimage->data ); 2019 b->rowimage->data = NULL; 2020 XMesaDestroyImage( b->rowimage ); 2021 } 2022 2023 free_xmesa_buffer(client, b); 2024} 2025 2026 2027 2028/* 2029 * Bind buffer b to context c and make c the current rendering context. 2030 */ 2031GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 2032{ 2033 return XMesaMakeCurrent2( c, b, b ); 2034} 2035 2036 2037/* 2038 * Bind buffer b to context c and make c the current rendering context. 2039 */ 2040GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 2041 XMesaBuffer readBuffer ) 2042{ 2043 if (c) { 2044 if (!drawBuffer || !readBuffer) 2045 return GL_FALSE; /* must specify buffers! */ 2046 2047#ifdef FX 2048 if (drawBuffer->FXctx) { 2049 fxMesaMakeCurrent(drawBuffer->FXctx); 2050 2051 c->xm_buffer = drawBuffer; 2052 2053 return GL_TRUE; 2054 } 2055#endif 2056 if (&(c->mesa) == _mesa_get_current_context() 2057 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 2058 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 2059 && ((XMesaBuffer) c->mesa.DrawBuffer)->wasCurrent) { 2060 /* same context and buffer, do nothing */ 2061 return GL_TRUE; 2062 } 2063 2064 c->xm_buffer = drawBuffer; 2065 2066 _mesa_make_current(&(c->mesa), 2067 &drawBuffer->mesa_buffer, 2068 &readBuffer->mesa_buffer); 2069 2070 if (c->xm_visual->mesa_visual.rgbMode) { 2071 /* 2072 * Must recompute and set these pixel values because colormap 2073 * can be different for different windows. 2074 */ 2075 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 2076 c->clearcolor[0], 2077 c->clearcolor[1], 2078 c->clearcolor[2], 2079 c->clearcolor[3], 2080 c->xm_visual->undithered_pf); 2081 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 2082 } 2083 2084 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 2085 drawBuffer->wasCurrent = GL_TRUE; 2086 } 2087 else { 2088 /* Detach */ 2089 _mesa_make_current( NULL, NULL, NULL ); 2090 } 2091 return GL_TRUE; 2092} 2093 2094 2095/* 2096 * Unbind the context c from its buffer. 2097 */ 2098GLboolean XMesaUnbindContext( XMesaContext c ) 2099{ 2100 /* A no-op for XFree86 integration purposes */ 2101 return GL_TRUE; 2102} 2103 2104 2105XMesaContext XMesaGetCurrentContext( void ) 2106{ 2107 GET_CURRENT_CONTEXT(ctx); 2108 if (ctx) { 2109 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2110 return xmesa; 2111 } 2112 else { 2113 return 0; 2114 } 2115} 2116 2117 2118XMesaBuffer XMesaGetCurrentBuffer( void ) 2119{ 2120 GET_CURRENT_CONTEXT(ctx); 2121 if (ctx) { 2122 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 2123 return xmbuf; 2124 } 2125 else { 2126 return 0; 2127 } 2128} 2129 2130 2131/* New in Mesa 3.1 */ 2132XMesaBuffer XMesaGetCurrentReadBuffer( void ) 2133{ 2134 GET_CURRENT_CONTEXT(ctx); 2135 if (ctx) { 2136 return (XMesaBuffer) (ctx->ReadBuffer); 2137 } 2138 else { 2139 return 0; 2140 } 2141} 2142 2143 2144GLboolean XMesaForceCurrent(XMesaContext c) 2145{ 2146 if (c) { 2147 if (&(c->mesa) != _mesa_get_current_context()) { 2148 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 2149 } 2150 } 2151 else { 2152 _mesa_make_current(NULL, NULL, NULL); 2153 } 2154 return GL_TRUE; 2155} 2156 2157 2158GLboolean XMesaLoseCurrent(XMesaContext c) 2159{ 2160 (void) c; 2161 _mesa_make_current(NULL, NULL, NULL); 2162 return GL_TRUE; 2163} 2164 2165 2166/* 2167 * Switch 3Dfx support hack between window and full-screen mode. 2168 */ 2169GLboolean XMesaSetFXmode( GLint mode ) 2170{ 2171#ifdef FX 2172 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2173 if (fx && fx[0] != 'd') { 2174 GET_CURRENT_CONTEXT(ctx); 2175 GrHwConfiguration hw; 2176 if (!FX_grSstQueryHardware(&hw)) { 2177 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2178 return GL_FALSE; 2179 } 2180 if (hw.num_sst < 1) { 2181 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2182 return GL_FALSE; 2183 } 2184 if (ctx) { 2185 /* [dBorca] Hack alert: 2186 * oh, this is sooo wrong: ctx above is 2187 * really an fxMesaContext, not an XMesaContext 2188 */ 2189 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 2190 if (mode == XMESA_FX_WINDOW) { 2191 if (xmbuf->FXisHackUsable) { 2192 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2193 xmbuf->FXwindowHack = GL_TRUE; 2194 return GL_TRUE; 2195 } 2196 } 2197 else if (mode == XMESA_FX_FULLSCREEN) { 2198 FX_grSstControl(GR_CONTROL_ACTIVATE); 2199 xmbuf->FXwindowHack = GL_FALSE; 2200 return GL_TRUE; 2201 } 2202 else { 2203 /* Error: Bad mode value */ 2204 } 2205 } 2206 } 2207 /*fprintf(stderr, "fallthrough\n");*/ 2208#else 2209 (void) mode; 2210#endif 2211 return GL_FALSE; 2212} 2213 2214 2215 2216#ifdef FX 2217/* 2218 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2219 */ 2220static void FXgetImage( XMesaBuffer b ) 2221{ 2222 GET_CURRENT_CONTEXT(ctx); 2223 static unsigned short pixbuf[MAX_WIDTH]; 2224 GLuint x, y; 2225 int xpos, ypos; 2226 XMesaWindow root; 2227 unsigned int bw, depth, width, height; 2228 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2229 2230#ifdef XFree86Server 2231 x = b->frontxrb->pixmap->x; 2232 y = b->frontxrb->pixmap->y; 2233 width = b->frontxrb->pixmap->width; 2234 height = b->frontxrb->pixmap->height; 2235 depth = b->frontxrb->pixmap->depth; 2236#else 2237 XGetGeometry( b->xm_visual->display, b->frontxrb->pixmap, 2238 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2239#endif 2240 if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) { 2241 b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width); 2242 b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height); 2243 if (b->mesa_buffer.Width & 1) 2244 b->mesa_buffer.Width--; /* prevent odd width */ 2245 xmesa_alloc_back_buffer(b, b->mesa_buffer.Width, b->mesa_buffer.Height); 2246 } 2247 2248 /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */ 2249 /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */ 2250 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2251 /* Special case: 16bpp RGB */ 2252 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2253 0, b->FXctx->height - b->mesa_buffer.Height, /*pos*/ 2254 b->mesa_buffer.Width, b->mesa_buffer.Height, /* size */ 2255 b->mesa_buffer.Width * sizeof(GLushort), /* stride */ 2256 b->backxrb->ximage->data); /* dest buffer */ 2257 } 2258 else if (b->xm_visual->dithered_pf==PF_Dither 2259 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2260 /* Special case: 8bpp RGB */ 2261 for (y=0;y<b->mesa_buffer.Height;y++) { 2262 GLubyte *ptr = (GLubyte*) b->backxrb->ximage->data 2263 + b->backxrb->ximage->bytes_per_line * y; 2264 XDITHER_SETUP(y); 2265 2266 /* read row from 3Dfx frame buffer */ 2267 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2268 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2269 b->mesa_buffer.Width, 1, 2270 0, 2271 pixbuf ); 2272 2273 /* write to XImage back buffer */ 2274 for (x=0;x<b->mesa_buffer.Width;x++) { 2275 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2276 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2277 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2278 *ptr++ = XDITHER( x, r, g, b); 2279 } 2280 } 2281 } 2282 else { 2283 /* General case: slow! */ 2284 for (y=0;y<b->mesa_buffer.Height;y++) { 2285 /* read row from 3Dfx frame buffer */ 2286 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2287 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2288 b->mesa_buffer.Width, 1, 2289 0, 2290 pixbuf ); 2291 2292 /* write to XImage back buffer */ 2293 for (x=0;x<b->mesa_buffer.Width;x++) { 2294 XMesaPutPixel(b->backxrb->ximage,x,y, 2295 xmesa_color_to_pixel(ctx, 2296 (pixbuf[x] & 0xf800) >> 8, 2297 (pixbuf[x] & 0x07e0) >> 3, 2298 (pixbuf[x] & 0x001f) << 3, 2299 0xff, 2300 b->xm_visual->undithered_pf)); 2301 } 2302 } 2303 } 2304 /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */ 2305} 2306#endif 2307 2308 2309/* 2310 * Copy the back buffer to the front buffer. If there's no back buffer 2311 * this is a no-op. 2312 */ 2313void XMesaSwapBuffers( XMesaBuffer b ) 2314{ 2315 GET_CURRENT_CONTEXT(ctx); 2316 2317 if (!b->backxrb) { 2318 /* single buffered */ 2319 return; 2320 } 2321 2322 /* If we're swapping the buffer associated with the current context 2323 * we have to flush any pending rendering commands first. 2324 */ 2325 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2326 _mesa_notifySwapBuffers(ctx); 2327 2328 if (b->db_mode) { 2329#ifdef FX 2330 if (b->FXctx) { 2331 fxMesaSwapBuffers(); 2332 2333 if (b->FXwindowHack) 2334 FXgetImage(b); 2335 else 2336 return; 2337 } 2338#endif 2339 if (b->backxrb->ximage) { 2340 /* Copy Ximage from host's memory to server's window */ 2341#if defined(USE_XSHM) && !defined(XFree86Server) 2342 if (b->shm) { 2343 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2344 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2345 b->swapgc, 2346 b->backxrb->ximage, 0, 0, 2347 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2348 False ); 2349 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2350 } 2351 else 2352#endif 2353 { 2354 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2355 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2356 b->swapgc, 2357 b->backxrb->ximage, 0, 0, 2358 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2359 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2360 } 2361 } 2362 else { 2363 /* Copy pixmap to window on server */ 2364 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2365 XMesaCopyArea( b->xm_visual->display, 2366 b->backxrb->pixmap, /* source drawable */ 2367 b->frontxrb->drawable, /* dest. drawable */ 2368 b->swapgc, 2369 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2370 0, 0 /* dest region */ 2371 ); 2372 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2373 } 2374 } 2375#if !defined(XFree86Server) 2376 XSync( b->xm_visual->display, False ); 2377#endif 2378} 2379 2380 2381 2382/* 2383 * Copy sub-region of back buffer to front buffer 2384 */ 2385void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2386{ 2387 GET_CURRENT_CONTEXT(ctx); 2388 2389 /* If we're swapping the buffer associated with the current context 2390 * we have to flush any pending rendering commands first. 2391 */ 2392 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2393 _mesa_notifySwapBuffers(ctx); 2394 2395 if (!b->backxrb) { 2396 /* single buffered */ 2397 return; 2398 } 2399 2400 if (b->db_mode) { 2401 int yTop = b->mesa_buffer.Height - y - height; 2402#ifdef FX 2403 if (b->FXctx) { 2404 fxMesaSwapBuffers(); 2405 if (b->FXwindowHack) 2406 FXgetImage(b); 2407 else 2408 return; 2409 } 2410#endif 2411 if (b->backxrb->ximage) { 2412 /* Copy Ximage from host's memory to server's window */ 2413#if defined(USE_XSHM) && !defined(XFree86Server) 2414 if (b->shm) { 2415 /* XXX assuming width and height aren't too large! */ 2416 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2417 b->swapgc, 2418 b->backxrb->ximage, x, yTop, 2419 x, yTop, width, height, False ); 2420 /* wait for finished event??? */ 2421 } 2422 else 2423#endif 2424 { 2425 /* XXX assuming width and height aren't too large! */ 2426 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2427 b->swapgc, 2428 b->backxrb->ximage, x, yTop, 2429 x, yTop, width, height ); 2430 } 2431 } 2432 else { 2433 /* Copy pixmap to window on server */ 2434 XMesaCopyArea( b->xm_visual->display, 2435 b->backxrb->pixmap, /* source drawable */ 2436 b->frontxrb->drawable, /* dest. drawable */ 2437 b->swapgc, 2438 x, yTop, width, height, /* source region */ 2439 x, yTop /* dest region */ 2440 ); 2441 } 2442 } 2443} 2444 2445 2446/* 2447 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2448 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2449 * back buffer directly. 2450 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2451 * ximage - pointer to back buffer's XImage, or NULL 2452 * Return: GL_TRUE = context is double buffered 2453 * GL_FALSE = context is single buffered 2454 */ 2455#ifndef XFree86Server 2456GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2457 XMesaPixmap *pixmap, 2458 XMesaImage **ximage ) 2459{ 2460 if (b->db_mode) { 2461 if (pixmap) 2462 *pixmap = b->backxrb->pixmap; 2463 if (ximage) 2464 *ximage = b->backxrb->ximage; 2465 return GL_TRUE; 2466 } 2467 else { 2468 *pixmap = 0; 2469 *ximage = NULL; 2470 return GL_FALSE; 2471 } 2472} 2473#endif /* XFree86Server */ 2474 2475 2476/* 2477 * Return the depth buffer associated with an XMesaBuffer. 2478 * Input: b - the XMesa buffer handle 2479 * Output: width, height - size of buffer in pixels 2480 * bytesPerValue - bytes per depth value (2 or 4) 2481 * buffer - pointer to depth buffer values 2482 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2483 */ 2484GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2485 GLint *bytesPerValue, void **buffer ) 2486{ 2487 struct gl_renderbuffer *rb 2488 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2489 if (!rb || !rb->Data) { 2490 *width = 0; 2491 *height = 0; 2492 *bytesPerValue = 0; 2493 *buffer = 0; 2494 return GL_FALSE; 2495 } 2496 else { 2497 *width = b->mesa_buffer.Width; 2498 *height = b->mesa_buffer.Height; 2499 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2500 ? sizeof(GLushort) : sizeof(GLuint); 2501 *buffer = rb->Data; 2502 return GL_TRUE; 2503 } 2504} 2505 2506 2507void XMesaFlush( XMesaContext c ) 2508{ 2509 if (c && c->xm_visual) { 2510#ifdef XFree86Server 2511 /* NOT_NEEDED */ 2512#else 2513 XSync( c->xm_visual->display, False ); 2514#endif 2515 } 2516} 2517 2518 2519 2520const char *XMesaGetString( XMesaContext c, int name ) 2521{ 2522 (void) c; 2523 if (name==XMESA_VERSION) { 2524 return "5.0"; 2525 } 2526 else if (name==XMESA_EXTENSIONS) { 2527 return ""; 2528 } 2529 else { 2530 return NULL; 2531 } 2532} 2533 2534 2535 2536XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2537{ 2538 XMesaBuffer b; 2539 for (b=XMesaBufferList; b; b=b->Next) { 2540 if (b->frontxrb->drawable == d && b->display == dpy) { 2541 return b; 2542 } 2543 } 2544 return NULL; 2545} 2546 2547 2548 2549/* 2550 * Look for XMesaBuffers whose X window has been destroyed. 2551 * Deallocate any such XMesaBuffers. 2552 */ 2553void XMesaGarbageCollect( void ) 2554{ 2555 XMesaBuffer b, next; 2556 for (b=XMesaBufferList; b; b=next) { 2557 next = b->Next; 2558 if (b->display && b->frontxrb->drawable && b->type == WINDOW) { 2559#ifdef XFree86Server 2560 /* NOT_NEEDED */ 2561#else 2562 XSync(b->display, False); 2563 if (!window_exists( b->display, b->frontxrb->drawable )) { 2564 /* found a dead window, free the ancillary info */ 2565 XMesaDestroyBuffer( b ); 2566 } 2567#endif 2568 } 2569 } 2570} 2571 2572 2573void XMesaReset( void ) 2574{ 2575 while (XMesaBufferList) 2576 XMesaDestroyBuffer(XMesaBufferList); 2577 2578 XMesaBufferList = NULL; 2579} 2580 2581 2582unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2583 GLfloat red, GLfloat green, 2584 GLfloat blue, GLfloat alpha ) 2585{ 2586 GLcontext *ctx = &xmesa->mesa; 2587 GLint r = (GLint) (red * 255.0F); 2588 GLint g = (GLint) (green * 255.0F); 2589 GLint b = (GLint) (blue * 255.0F); 2590 GLint a = (GLint) (alpha * 255.0F); 2591 2592 switch (xmesa->pixelformat) { 2593 case PF_Index: 2594 return 0; 2595 case PF_Truecolor: 2596 { 2597 unsigned long p; 2598 PACK_TRUECOLOR( p, r, g, b ); 2599 return p; 2600 } 2601 case PF_8A8B8G8R: 2602 return PACK_8A8B8G8R( r, g, b, a ); 2603 case PF_8A8R8G8B: 2604 return PACK_8A8R8G8B( r, g, b, a ); 2605 case PF_8R8G8B: 2606 return PACK_8R8G8B( r, g, b ); 2607 case PF_5R6G5B: 2608 return PACK_5R6G5B( r, g, b ); 2609 case PF_Dither: 2610 { 2611 DITHER_SETUP; 2612 return DITHER( x, y, r, g, b ); 2613 } 2614 case PF_1Bit: 2615 /* 382 = (3*255)/2 */ 2616 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2617 case PF_HPCR: 2618 return DITHER_HPCR(x, y, r, g, b); 2619 case PF_Lookup: 2620 { 2621 LOOKUP_SETUP; 2622 return LOOKUP( r, g, b ); 2623 } 2624 case PF_Grayscale: 2625 return GRAY_RGB( r, g, b ); 2626 case PF_Dither_5R6G5B: 2627 /* fall through */ 2628 case PF_Dither_True: 2629 { 2630 unsigned long p; 2631 PACK_TRUEDITHER(p, x, y, r, g, b); 2632 return p; 2633 } 2634 default: 2635 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2636 } 2637 return 0; 2638} 2639 2640 2641/* 2642 * This is typically called when the window size changes and we need 2643 * to reallocate the buffer's back/depth/stencil/accum buffers. 2644 */ 2645void XMesaResizeBuffers( XMesaBuffer b ) 2646{ 2647#ifdef XFree86Server 2648 GLuint winwidth, winheight; 2649 GET_CURRENT_CONTEXT(ctx); 2650 2651 winwidth = MIN2(b->frontxrb->drawable->width, MAX_WIDTH); 2652 winheight = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT); 2653 2654 xmesa_resize_buffers(ctx, &(b->mesa_buffer), winwidth, winheight); 2655#else 2656 Window root; 2657 int xpos, ypos; 2658 unsigned int width, height, bw, depth; 2659 GET_CURRENT_CONTEXT(ctx); 2660 XGetGeometry( b->xm_visual->display, b->frontxrb->pixmap, 2661 &root, &xpos, &ypos, &width, &height, &bw, &depth); 2662 xmesa_resize_buffers(ctx, &(b->mesa_buffer), width, height); 2663#endif 2664} 2665 2666