xm_api.c revision 6aa5668871e7f366b33e85fabc72885fc269a7d4
15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Mesa 3-D graphics library 35c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Version: 6.5.2 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 75c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Permission is hereby granted, free of charge, to any person obtaining a 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * copy of this software and associated documentation files (the "Software"), 95c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * to deal in the Software without restriction, including without limitation 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * the rights to use, copy, modify, merge, publish, distribute, sublicense, 115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * and/or sell copies of the Software, and to permit persons to whom the 125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Software is furnished to do so, subject to the following conditions: 135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * The above copyright notice and this permission notice shall be included 155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * in all copies or substantial portions of the Software. 165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles) * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 2451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 2551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)/** 2651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) * \file xm_api.c 2751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) * 2851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) * All the XMesa* API functions. 2951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) * 3051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) * 3151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) * NOTES: 3251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) * 3351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) * The window coordinate system origin (0,0) is in the lower-left corner 3451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) * of the window. X11's window coordinate origin is in the upper-left 355267f701546148b83dfbe1d151cb184385bb5c22Torne (Richard Coles) * corner of the window. Therefore, most drawing functions in this 3693ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) * file have to flip Y coordinates. 375267f701546148b83dfbe1d151cb184385bb5c22Torne (Richard Coles) * 3893ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile 395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * in support for the MIT Shared Memory extension. If enabled, when you 40 * use an Ximage for the back buffer in double buffered mode, the "swap" 41 * operation will be faster. You must also link with -lXext. 42 * 43 * Byte swapping: If the Mesa host and the X display use a different 44 * byte order then there's some trickiness to be aware of when using 45 * XImages. The byte ordering used for the XImage is that of the X 46 * display, not the Mesa host. 47 * The color-to-pixel encoding for True/DirectColor must be done 48 * according to the display's visual red_mask, green_mask, and blue_mask. 49 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will 50 * do byte swapping if needed. If one wants to directly "poke" the pixel 51 * into the XImage's buffer then the pixel must be byte swapped first. In 52 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format 53 * and use XPutPixel everywhere except in the implementation of 54 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so 55 * instead of using XPutPixel we "poke" our values after byte-swapping 56 * the clear pixel value if needed. 57 * 58 */ 59 60#ifdef __CYGWIN__ 61#undef WIN32 62#undef __WIN32__ 63#endif 64 65#include "glxheader.h" 66#include "GL/xmesa.h" 67#include "xmesaP.h" 68#include "context.h" 69#include "extensions.h" 70#include "framebuffer.h" 71#include "glthread.h" 72#include "imports.h" 73#include "macros.h" 74#include "renderbuffer.h" 75#include "swrast/swrast.h" 76#include "swrast_setup/swrast_setup.h" 77#include "vbo/vbo.h" 78#include "tnl/tnl.h" 79#include "tnl/t_context.h" 80#include "tnl/t_pipeline.h" 81#include "drivers/common/driverfuncs.h" 82 83/** 84 * Global X driver lock 85 */ 86_glthread_Mutex _xmesa_lock; 87 88 89 90/** 91 * Lookup tables for HPCR pixel format: 92 */ 93static short hpcr_rgbTbl[3][256] = { 94{ 95 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 96 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 97 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 98 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 99 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 100 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 101 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 102 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 103112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 104128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 105144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 106160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 107176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 108192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 109208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 110224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 111}, 112{ 113 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 114 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 115 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 116 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 117 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 118 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 119 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 120 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 121112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 122128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 123144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 124160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 125176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 126192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 127208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 128224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239 129}, 130{ 131 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39, 132 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47, 133 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55, 134 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63, 135 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 136 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79, 137 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 138 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 139 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 140112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 141128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 142144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 143160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 144176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 145192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 146208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223 147} 148}; 149 150 151 152/**********************************************************************/ 153/***** X Utility Functions *****/ 154/**********************************************************************/ 155 156 157/** 158 * Return the host's byte order as LSBFirst or MSBFirst ala X. 159 */ 160#ifndef XFree86Server 161static int host_byte_order( void ) 162{ 163 int i = 1; 164 char *cptr = (char *) &i; 165 return (*cptr==1) ? LSBFirst : MSBFirst; 166} 167#endif 168 169 170/** 171 * Check if the X Shared Memory extension is available. 172 * Return: 0 = not available 173 * 1 = shared XImage support available 174 * 2 = shared Pixmap support available also 175 */ 176static int check_for_xshm( XMesaDisplay *display ) 177{ 178#if defined(USE_XSHM) && !defined(XFree86Server) 179 int major, minor, ignore; 180 Bool pixmaps; 181 182 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { 183 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { 184 return (pixmaps==True) ? 2 : 1; 185 } 186 else { 187 return 0; 188 } 189 } 190 else { 191 return 0; 192 } 193#else 194 /* No XSHM support */ 195 return 0; 196#endif 197} 198 199 200/** 201 * Apply gamma correction to an intensity value in [0..max]. Return the 202 * new intensity value. 203 */ 204static GLint 205gamma_adjust( GLfloat gamma, GLint value, GLint max ) 206{ 207 if (gamma == 1.0) { 208 return value; 209 } 210 else { 211 double x = (double) value / (double) max; 212 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma)); 213 } 214} 215 216 217 218/** 219 * Return the true number of bits per pixel for XImages. 220 * For example, if we request a 24-bit deep visual we may actually need/get 221 * 32bpp XImages. This function returns the appropriate bpp. 222 * Input: dpy - the X display 223 * visinfo - desribes the visual to be used for XImages 224 * Return: true number of bits per pixel for XImages 225 */ 226static int 227bits_per_pixel( XMesaVisual xmv ) 228{ 229#ifdef XFree86Server 230 const int depth = xmv->nplanes; 231 int i; 232 assert(depth > 0); 233 for (i = 0; i < screenInfo.numPixmapFormats; i++) { 234 if (screenInfo.formats[i].depth == depth) 235 return screenInfo.formats[i].bitsPerPixel; 236 } 237 return depth; /* should never get here, but this should be safe */ 238#else 239 XMesaDisplay *dpy = xmv->display; 240 XMesaVisualInfo visinfo = xmv->visinfo; 241 XMesaImage *img; 242 int bitsPerPixel; 243 /* Create a temporary XImage */ 244 img = XCreateImage( dpy, visinfo->visual, visinfo->depth, 245 ZPixmap, 0, /*format, offset*/ 246 (char*) MALLOC(8), /*data*/ 247 1, 1, /*width, height*/ 248 32, /*bitmap_pad*/ 249 0 /*bytes_per_line*/ 250 ); 251 assert(img); 252 /* grab the bits/pixel value */ 253 bitsPerPixel = img->bits_per_pixel; 254 /* free the XImage */ 255 _mesa_free( img->data ); 256 img->data = NULL; 257 XMesaDestroyImage( img ); 258 return bitsPerPixel; 259#endif 260} 261 262 263 264/* 265 * Determine if a given X window ID is valid (window exists). 266 * Do this by calling XGetWindowAttributes() for the window and 267 * checking if we catch an X error. 268 * Input: dpy - the display 269 * win - the window to check for existance 270 * Return: GL_TRUE - window exists 271 * GL_FALSE - window doesn't exist 272 */ 273#ifndef XFree86Server 274static GLboolean WindowExistsFlag; 275 276static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr ) 277{ 278 (void) dpy; 279 if (xerr->error_code == BadWindow) { 280 WindowExistsFlag = GL_FALSE; 281 } 282 return 0; 283} 284 285static GLboolean window_exists( XMesaDisplay *dpy, Window win ) 286{ 287 XWindowAttributes wa; 288 int (*old_handler)( XMesaDisplay*, XErrorEvent* ); 289 WindowExistsFlag = GL_TRUE; 290 old_handler = XSetErrorHandler(window_exists_err_handler); 291 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */ 292 XSetErrorHandler(old_handler); 293 return WindowExistsFlag; 294} 295#endif 296 297 298 299/** 300 * Return the size of the window (or pixmap) that corresponds to the 301 * given XMesaBuffer. 302 * \param width returns width in pixels 303 * \param height returns height in pixels 304 */ 305void 306xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b, 307 GLuint *width, GLuint *height) 308{ 309#ifdef XFree86Server 310 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH); 311 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT); 312#else 313 Window root; 314 Status stat; 315 int xpos, ypos; 316 unsigned int w, h, bw, depth; 317 318 _glthread_LOCK_MUTEX(_xmesa_lock); 319 XSync(b->xm_visual->display, 0); /* added for Chromium */ 320 stat = XGetGeometry(dpy, b->frontxrb->pixmap, &root, &xpos, &ypos, 321 &w, &h, &bw, &depth); 322 _glthread_UNLOCK_MUTEX(_xmesa_lock); 323 324 if (stat) { 325 *width = w; 326 *height = h; 327 } 328 else { 329 /* probably querying a window that's recently been destroyed */ 330 _mesa_warning(NULL, "XGetGeometry failed!\n"); 331 *width = *height = 1; 332 } 333#endif 334} 335 336 337 338/**********************************************************************/ 339/***** Linked list of XMesaBuffers *****/ 340/**********************************************************************/ 341 342XMesaBuffer XMesaBufferList = NULL; 343 344 345/** 346 * Allocate a new XMesaBuffer object which corresponds to the given drawable. 347 * Note that XMesaBuffer is derived from GLframebuffer. 348 * The new XMesaBuffer will not have any size (Width=Height=0). 349 * 350 * \param d the corresponding X drawable (window or pixmap) 351 * \param type either WINDOW, PIXMAP or PBUFFER, describing d 352 * \param vis the buffer's visual 353 * \param cmap the window's colormap, if known. 354 * \return new XMesaBuffer or NULL if any problem 355 */ 356static XMesaBuffer 357create_xmesa_buffer(XMesaDrawable d, BufferType type, 358 XMesaVisual vis, XMesaColormap cmap) 359{ 360 XMesaBuffer b; 361 362 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); 363 364 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer); 365 if (!b) 366 return NULL; 367 368 b->display = vis->display; 369 b->xm_visual = vis; 370 b->type = type; 371 b->cmap = cmap; 372 373 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual); 374 b->mesa_buffer.Delete = xmesa_delete_framebuffer; 375 376 /* 377 * Front renderbuffer 378 */ 379 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE); 380 if (!b->frontxrb) { 381 _mesa_free(b); 382 return NULL; 383 } 384 b->frontxrb->Parent = b; 385 b->frontxrb->drawable = d; 386 b->frontxrb->pixmap = (XMesaPixmap) d; 387 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT, 388 &b->frontxrb->Base); 389 390 /* 391 * Back renderbuffer 392 */ 393 if (vis->mesa_visual.doubleBufferMode) { 394 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE); 395 if (!b->backxrb) { 396 /* XXX free front xrb too */ 397 _mesa_free(b); 398 return NULL; 399 } 400 b->backxrb->Parent = b; 401 /* determine back buffer implementation */ 402 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP; 403 404 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT, 405 &b->backxrb->Base); 406 } 407 408 /* 409 * Software alpha planes 410 */ 411 if (vis->mesa_visual.alphaBits > 0 412 && vis->undithered_pf != PF_8A8B8G8R 413 && vis->undithered_pf != PF_8A8R8G8B) { 414 /* Visual has alpha, but pixel format doesn't support it. 415 * We'll use an alpha renderbuffer wrapper. 416 */ 417 b->swAlpha = GL_TRUE; 418 } 419 else { 420 b->swAlpha = GL_FALSE; 421 } 422 423 /* 424 * Other renderbuffer (depth, stencil, etc) 425 */ 426 _mesa_add_soft_renderbuffers(&b->mesa_buffer, 427 GL_FALSE, /* color */ 428 vis->mesa_visual.haveDepthBuffer, 429 vis->mesa_visual.haveStencilBuffer, 430 vis->mesa_visual.haveAccumBuffer, 431 b->swAlpha, 432 vis->mesa_visual.numAuxBuffers > 0 ); 433 434 /* insert buffer into linked list */ 435 b->Next = XMesaBufferList; 436 XMesaBufferList = b; 437 438 return b; 439} 440 441 442/** 443 * Find an XMesaBuffer by matching X display and colormap but NOT matching 444 * the notThis buffer. 445 */ 446XMesaBuffer 447xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis) 448{ 449 XMesaBuffer b; 450 for (b=XMesaBufferList; b; b=b->Next) { 451 if (b->display==dpy && b->cmap==cmap && b!=notThis) { 452 return b; 453 } 454 } 455 return NULL; 456} 457 458 459/** 460 * Remove buffer from linked list, delete if no longer referenced. 461 */ 462static void 463xmesa_free_buffer(XMesaBuffer buffer) 464{ 465 XMesaBuffer prev = NULL, b; 466 467 for (b = XMesaBufferList; b; b = b->Next) { 468 if (b == buffer) { 469 struct gl_framebuffer *fb = &buffer->mesa_buffer; 470 471 /* unlink buffer from list */ 472 if (prev) 473 prev->Next = buffer->Next; 474 else 475 XMesaBufferList = buffer->Next; 476 477 /* mark as delete pending */ 478 fb->DeletePending = GL_TRUE; 479 480 /* Since the X window for the XMesaBuffer is going away, we don't 481 * want to dereference this pointer in the future. 482 */ 483 b->frontxrb->drawable = 0; 484 485 /* Unreference. If count = zero we'll really delete the buffer */ 486 _mesa_unreference_framebuffer(&fb); 487 488 return; 489 } 490 /* continue search */ 491 prev = b; 492 } 493 /* buffer not found in XMesaBufferList */ 494 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n"); 495} 496 497 498/** 499 * Copy X color table stuff from one XMesaBuffer to another. 500 */ 501static void 502copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src) 503{ 504 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table)); 505 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r)); 506 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g)); 507 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b)); 508 dst->num_alloced = src->num_alloced; 509 MEMCPY(dst->alloced_colors, src->alloced_colors, 510 sizeof(src->alloced_colors)); 511} 512 513 514 515/**********************************************************************/ 516/***** Misc Private Functions *****/ 517/**********************************************************************/ 518 519 520/** 521 * A replacement for XAllocColor. This function should never 522 * fail to allocate a color. When XAllocColor fails, we return 523 * the nearest matching color. If we have to allocate many colors 524 * this function isn't too efficient; the XQueryColors() could be 525 * done just once. 526 * Written by Michael Pichler, Brian Paul, Mark Kilgard 527 * Input: dpy - X display 528 * cmap - X colormap 529 * cmapSize - size of colormap 530 * In/Out: color - the XColor struct 531 * Output: exact - 1=exact color match, 0=closest match 532 * alloced - 1=XAlloc worked, 0=XAlloc failed 533 */ 534static void 535noFaultXAllocColor( int client, 536 XMesaDisplay *dpy, 537 XMesaColormap cmap, 538 int cmapSize, 539 XMesaColor *color, 540 int *exact, int *alloced ) 541{ 542#ifdef XFree86Server 543 Pixel *ppixIn; 544 xrgb *ctable; 545#else 546 /* we'll try to cache ctable for better remote display performance */ 547 static Display *prevDisplay = NULL; 548 static XMesaColormap prevCmap = 0; 549 static int prevCmapSize = 0; 550 static XMesaColor *ctable = NULL; 551#endif 552 XMesaColor subColor; 553 int i, bestmatch; 554 double mindist; /* 3*2^16^2 exceeds long int precision. */ 555 556 (void) client; 557 558 /* First try just using XAllocColor. */ 559#ifdef XFree86Server 560 if (AllocColor(cmap, 561 &color->red, &color->green, &color->blue, 562 &color->pixel, 563 client) == Success) 564#else 565 if (XAllocColor(dpy, cmap, color)) 566#endif 567 { 568 *exact = 1; 569 *alloced = 1; 570 return; 571 } 572 573 /* Alloc failed, search for closest match */ 574 575 /* Retrieve color table entries. */ 576 /* XXX alloca candidate. */ 577#ifdef XFree86Server 578 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel)); 579 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb)); 580 for (i = 0; i < cmapSize; i++) { 581 ppixIn[i] = i; 582 } 583 QueryColors(cmap, cmapSize, ppixIn, ctable); 584#else 585 if (prevDisplay != dpy || prevCmap != cmap 586 || prevCmapSize != cmapSize || !ctable) { 587 /* free previously cached color table */ 588 if (ctable) 589 _mesa_free(ctable); 590 /* Get the color table from X */ 591 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor)); 592 assert(ctable); 593 for (i = 0; i < cmapSize; i++) { 594 ctable[i].pixel = i; 595 } 596 XQueryColors(dpy, cmap, ctable, cmapSize); 597 prevDisplay = dpy; 598 prevCmap = cmap; 599 prevCmapSize = cmapSize; 600 } 601#endif 602 603 /* Find best match. */ 604 bestmatch = -1; 605 mindist = 0.0; 606 for (i = 0; i < cmapSize; i++) { 607 double dr = 0.30 * ((double) color->red - (double) ctable[i].red); 608 double dg = 0.59 * ((double) color->green - (double) ctable[i].green); 609 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue); 610 double dist = dr * dr + dg * dg + db * db; 611 if (bestmatch < 0 || dist < mindist) { 612 bestmatch = i; 613 mindist = dist; 614 } 615 } 616 617 /* Return result. */ 618 subColor.red = ctable[bestmatch].red; 619 subColor.green = ctable[bestmatch].green; 620 subColor.blue = ctable[bestmatch].blue; 621 /* Try to allocate the closest match color. This should only 622 * fail if the cell is read/write. Otherwise, we're incrementing 623 * the cell's reference count. 624 */ 625#ifdef XFree86Server 626 if (AllocColor(cmap, 627 &subColor.red, &subColor.green, &subColor.blue, 628 &subColor.pixel, 629 client) == Success) { 630#else 631 if (XAllocColor(dpy, cmap, &subColor)) { 632#endif 633 *alloced = 1; 634 } 635 else { 636 /* do this to work around a problem reported by Frank Ortega */ 637 subColor.pixel = (unsigned long) bestmatch; 638 subColor.red = ctable[bestmatch].red; 639 subColor.green = ctable[bestmatch].green; 640 subColor.blue = ctable[bestmatch].blue; 641 subColor.flags = DoRed | DoGreen | DoBlue; 642 *alloced = 0; 643 } 644#ifdef XFree86Server 645 _mesa_free(ppixIn); 646 _mesa_free(ctable); 647#else 648 /* don't free table, save it for next time */ 649#endif 650 651 *color = subColor; 652 *exact = 0; 653} 654 655 656 657/** 658 * Do setup for PF_GRAYSCALE pixel format. 659 * Note that buffer may be NULL. 660 */ 661static GLboolean 662setup_grayscale(int client, XMesaVisual v, 663 XMesaBuffer buffer, XMesaColormap cmap) 664{ 665 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 666 return GL_FALSE; 667 } 668 669 if (buffer) { 670 XMesaBuffer prevBuffer; 671 672 if (!cmap) { 673 return GL_FALSE; 674 } 675 676 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 677 if (prevBuffer && 678 (buffer->xm_visual->mesa_visual.rgbMode == 679 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 680 /* Copy colormap stuff from previous XMesaBuffer which uses same 681 * X colormap. Do this to avoid time spent in noFaultXAllocColor. 682 */ 683 copy_colortable_info(buffer, prevBuffer); 684 } 685 else { 686 /* Allocate 256 shades of gray */ 687 int gray; 688 int colorsfailed = 0; 689 for (gray=0;gray<256;gray++) { 690 GLint r = gamma_adjust( v->RedGamma, gray, 255 ); 691 GLint g = gamma_adjust( v->GreenGamma, gray, 255 ); 692 GLint b = gamma_adjust( v->BlueGamma, gray, 255 ); 693 int exact, alloced; 694 XMesaColor xcol; 695 xcol.red = (r << 8) | r; 696 xcol.green = (g << 8) | g; 697 xcol.blue = (b << 8) | b; 698 noFaultXAllocColor( client, v->display, 699 cmap, GET_COLORMAP_SIZE(v), 700 &xcol, &exact, &alloced ); 701 if (!exact) { 702 colorsfailed++; 703 } 704 if (alloced) { 705 assert(buffer->num_alloced<256); 706 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 707 buffer->num_alloced++; 708 } 709 710 /*OLD 711 assert(gray < 576); 712 buffer->color_table[gray*3+0] = xcol.pixel; 713 buffer->color_table[gray*3+1] = xcol.pixel; 714 buffer->color_table[gray*3+2] = xcol.pixel; 715 assert(xcol.pixel < 65536); 716 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100; 717 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100; 718 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100; 719 */ 720 buffer->color_table[gray] = xcol.pixel; 721 assert(xcol.pixel < 65536); 722 buffer->pixel_to_r[xcol.pixel] = gray; 723 buffer->pixel_to_g[xcol.pixel] = gray; 724 buffer->pixel_to_b[xcol.pixel] = gray; 725 } 726 727 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 728 _mesa_warning(NULL, 729 "Note: %d out of 256 needed colors do not match exactly.\n", 730 colorsfailed ); 731 } 732 } 733 } 734 735 v->dithered_pf = PF_Grayscale; 736 v->undithered_pf = PF_Grayscale; 737 return GL_TRUE; 738} 739 740 741 742/** 743 * Setup RGB rendering for a window with a PseudoColor, StaticColor, 744 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225 745 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB 746 * color. While this function was originally designed just for 8-bit 747 * visuals, it has also proven to work from 4-bit up to 16-bit visuals. 748 * Dithering code contributed by Bob Mercier. 749 */ 750static GLboolean 751setup_dithered_color(int client, XMesaVisual v, 752 XMesaBuffer buffer, XMesaColormap cmap) 753{ 754 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) { 755 return GL_FALSE; 756 } 757 758 if (buffer) { 759 XMesaBuffer prevBuffer; 760 761 if (!cmap) { 762 return GL_FALSE; 763 } 764 765 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer); 766 if (prevBuffer && 767 (buffer->xm_visual->mesa_visual.rgbMode == 768 prevBuffer->xm_visual->mesa_visual.rgbMode)) { 769 /* Copy colormap stuff from previous, matching XMesaBuffer. 770 * Do this to avoid time spent in noFaultXAllocColor. 771 */ 772 copy_colortable_info(buffer, prevBuffer); 773 } 774 else { 775 /* Allocate X colors and initialize color_table[], red_table[], etc */ 776 int r, g, b, i; 777 int colorsfailed = 0; 778 for (r = 0; r < DITH_R; r++) { 779 for (g = 0; g < DITH_G; g++) { 780 for (b = 0; b < DITH_B; b++) { 781 XMesaColor xcol; 782 int exact, alloced; 783 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535); 784 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535); 785 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535); 786 noFaultXAllocColor( client, v->display, 787 cmap, GET_COLORMAP_SIZE(v), 788 &xcol, &exact, &alloced ); 789 if (!exact) { 790 colorsfailed++; 791 } 792 if (alloced) { 793 assert(buffer->num_alloced<256); 794 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel; 795 buffer->num_alloced++; 796 } 797 i = DITH_MIX( r, g, b ); 798 assert(i < 576); 799 buffer->color_table[i] = xcol.pixel; 800 assert(xcol.pixel < 65536); 801 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1); 802 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1); 803 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1); 804 } 805 } 806 } 807 808 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) { 809 _mesa_warning(NULL, 810 "Note: %d out of %d needed colors do not match exactly.\n", 811 colorsfailed, DITH_R * DITH_G * DITH_B ); 812 } 813 } 814 } 815 816 v->dithered_pf = PF_Dither; 817 v->undithered_pf = PF_Lookup; 818 return GL_TRUE; 819} 820 821 822/** 823 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode. 824 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer. 825 * Special dithering tables have to be initialized. 826 */ 827static void 828setup_8bit_hpcr(XMesaVisual v) 829{ 830 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be) 831 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined 832 * on the root window AND the colormap obtainable by XGetRGBColormaps 833 * for that atom must be set on the window. (see also tkInitWindow) 834 * If that colormap is not set, the output will look stripy. 835 */ 836 837 /* Setup color tables with gamma correction */ 838 int i; 839 double g; 840 841 g = 1.0 / v->RedGamma; 842 for (i=0; i<256; i++) { 843 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g )); 844 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); 845 } 846 847 g = 1.0 / v->GreenGamma; 848 for (i=0; i<256; i++) { 849 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g )); 850 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); 851 } 852 853 g = 1.0 / v->BlueGamma; 854 for (i=0; i<256; i++) { 855 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g )); 856 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); 857 } 858 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ 859 v->dithered_pf = PF_HPCR; 860 861 /* which method should I use to clear */ 862 /* GL_FALSE: keep the ordinary method */ 863 /* GL_TRUE : clear with dither pattern */ 864 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE; 865 866 if (v->hpcr_clear_flag) { 867 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display, 868 DefaultRootWindow(v->display), 869 16, 2, 8); 870#ifndef XFree86Server 871 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap, 872 0, 0, 16, 2, AllPlanes, ZPixmap); 873#endif 874 } 875} 876 877 878/** 879 * Setup RGB rendering for a window with a True/DirectColor visual. 880 */ 881static void 882setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap) 883{ 884 unsigned long rmask, gmask, bmask; 885 (void) buffer; 886 (void) cmap; 887 888 /* Compute red multiplier (mask) and bit shift */ 889 v->rshift = 0; 890 rmask = GET_REDMASK(v); 891 while ((rmask & 1)==0) { 892 v->rshift++; 893 rmask = rmask >> 1; 894 } 895 896 /* Compute green multiplier (mask) and bit shift */ 897 v->gshift = 0; 898 gmask = GET_GREENMASK(v); 899 while ((gmask & 1)==0) { 900 v->gshift++; 901 gmask = gmask >> 1; 902 } 903 904 /* Compute blue multiplier (mask) and bit shift */ 905 v->bshift = 0; 906 bmask = GET_BLUEMASK(v); 907 while ((bmask & 1)==0) { 908 v->bshift++; 909 bmask = bmask >> 1; 910 } 911 912 /* 913 * Compute component-to-pixel lookup tables and dithering kernel 914 */ 915 { 916 static GLubyte kernel[16] = { 917 0*16, 8*16, 2*16, 10*16, 918 12*16, 4*16, 14*16, 6*16, 919 3*16, 11*16, 1*16, 9*16, 920 15*16, 7*16, 13*16, 5*16, 921 }; 922 GLint rBits = _mesa_bitcount(rmask); 923 GLint gBits = _mesa_bitcount(gmask); 924 GLint bBits = _mesa_bitcount(bmask); 925 GLint maxBits; 926 GLuint i; 927 928 /* convert pixel components in [0,_mask] to RGB values in [0,255] */ 929 for (i=0; i<=rmask; i++) 930 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask); 931 for (i=0; i<=gmask; i++) 932 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask); 933 for (i=0; i<=bmask; i++) 934 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask); 935 936 /* convert RGB values from [0,255] to pixel components */ 937 938 for (i=0;i<256;i++) { 939 GLint r = gamma_adjust(v->RedGamma, i, 255); 940 GLint g = gamma_adjust(v->GreenGamma, i, 255); 941 GLint b = gamma_adjust(v->BlueGamma, i, 255); 942 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift; 943 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift; 944 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift; 945 } 946 /* overflow protection */ 947 for (i=256;i<512;i++) { 948 v->RtoPixel[i] = v->RtoPixel[255]; 949 v->GtoPixel[i] = v->GtoPixel[255]; 950 v->BtoPixel[i] = v->BtoPixel[255]; 951 } 952 953 /* setup dithering kernel */ 954 maxBits = rBits; 955 if (gBits > maxBits) maxBits = gBits; 956 if (bBits > maxBits) maxBits = bBits; 957 for (i=0;i<16;i++) { 958 v->Kernel[i] = kernel[i] >> maxBits; 959 } 960 961 v->undithered_pf = PF_Truecolor; 962 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor; 963 } 964 965 /* 966 * Now check for TrueColor visuals which we can optimize. 967 */ 968 if ( GET_REDMASK(v) ==0x0000ff 969 && GET_GREENMASK(v)==0x00ff00 970 && GET_BLUEMASK(v) ==0xff0000 971 && CHECK_BYTE_ORDER(v) 972 && v->BitsPerPixel==32 973 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 974 /* common 32 bpp config used on SGI, Sun */ 975 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */ 976 } 977 else if (GET_REDMASK(v) == 0xff0000 978 && GET_GREENMASK(v)== 0x00ff00 979 && GET_BLUEMASK(v) == 0x0000ff 980 && CHECK_BYTE_ORDER(v) 981 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){ 982 if (v->BitsPerPixel==32) { 983 /* if 32 bpp, and visual indicates 8 bpp alpha channel */ 984 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8) 985 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */ 986 else 987 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */ 988 } 989 else if (v->BitsPerPixel == 24) { 990 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */ 991 } 992 } 993 else if (GET_REDMASK(v) ==0xf800 994 && GET_GREENMASK(v)==0x07e0 995 && GET_BLUEMASK(v) ==0x001f 996 && CHECK_BYTE_ORDER(v) 997 && v->BitsPerPixel==16 998 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) { 999 /* 5-6-5 RGB */ 1000 v->undithered_pf = PF_5R6G5B; 1001 v->dithered_pf = PF_Dither_5R6G5B; 1002 } 1003 else if (GET_REDMASK(v) ==0xe0 1004 && GET_GREENMASK(v)==0x1c 1005 && GET_BLUEMASK(v) ==0x03 1006 && CHECK_FOR_HPCR(v)) { 1007 /* 8-bit HP color recovery */ 1008 setup_8bit_hpcr( v ); 1009 } 1010} 1011 1012 1013 1014/** 1015 * Setup RGB rendering for a window with a monochrome visual. 1016 */ 1017static void 1018setup_monochrome( XMesaVisual v, XMesaBuffer b ) 1019{ 1020 (void) b; 1021 v->dithered_pf = v->undithered_pf = PF_1Bit; 1022 /* if black=1 then we must flip pixel values */ 1023 v->bitFlip = (GET_BLACK_PIXEL(v) != 0); 1024} 1025 1026 1027 1028/** 1029 * When a context is bound for the first time, we can finally finish 1030 * initializing the context's visual and buffer information. 1031 * \param v the XMesaVisual to initialize 1032 * \param b the XMesaBuffer to initialize (may be NULL) 1033 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode 1034 * \param window the window/pixmap we're rendering into 1035 * \param cmap the colormap associated with the window/pixmap 1036 * \return GL_TRUE=success, GL_FALSE=failure 1037 */ 1038static GLboolean 1039initialize_visual_and_buffer(int client, XMesaVisual v, XMesaBuffer b, 1040 GLboolean rgb_flag, XMesaDrawable window, 1041 XMesaColormap cmap) 1042{ 1043 ASSERT(!b || b->xm_visual == v); 1044 1045 /* Save true bits/pixel */ 1046 v->BitsPerPixel = bits_per_pixel(v); 1047 assert(v->BitsPerPixel > 0); 1048 1049 if (rgb_flag == GL_FALSE) { 1050 /* COLOR-INDEXED WINDOW: 1051 * Even if the visual is TrueColor or DirectColor we treat it as 1052 * being color indexed. This is weird but might be useful to someone. 1053 */ 1054 v->dithered_pf = v->undithered_pf = PF_Index; 1055 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v); 1056 } 1057 else { 1058 /* RGB WINDOW: 1059 * We support RGB rendering into almost any kind of visual. 1060 */ 1061 const int xclass = v->mesa_visual.visualType; 1062 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1063 setup_truecolor( v, b, cmap ); 1064 } 1065 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) { 1066 setup_monochrome( v, b ); 1067 } 1068 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) { 1069 if (!setup_grayscale( client, v, b, cmap )) { 1070 return GL_FALSE; 1071 } 1072 } 1073 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR) 1074 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) { 1075 if (!setup_dithered_color( client, v, b, cmap )) { 1076 return GL_FALSE; 1077 } 1078 } 1079 else { 1080 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n"); 1081 return GL_FALSE; 1082 } 1083 v->mesa_visual.indexBits = 0; 1084 1085 if (_mesa_getenv("MESA_NO_DITHER")) { 1086 v->dithered_pf = v->undithered_pf; 1087 } 1088 } 1089 1090 1091 /* 1092 * If MESA_INFO env var is set print out some debugging info 1093 * which can help Brian figure out what's going on when a user 1094 * reports bugs. 1095 */ 1096 if (_mesa_getenv("MESA_INFO")) { 1097 _mesa_printf("X/Mesa visual = %p\n", (void *) v); 1098 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf); 1099 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf); 1100 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level); 1101 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v)); 1102 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel); 1103 } 1104 1105 if (b && window) { 1106 /* Do window-specific initializations */ 1107 1108 /* these should have been set in create_xmesa_buffer */ 1109 ASSERT(b->frontxrb->drawable == window); 1110 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window); 1111 1112 /* Setup for single/double buffering */ 1113 if (v->mesa_visual.doubleBufferMode) { 1114 /* Double buffered */ 1115 b->shm = check_for_xshm( v->display ); 1116 } 1117 1118 /* X11 graphics contexts */ 1119#ifdef XFree86Server 1120 b->gc = CreateScratchGC(v->display, window->depth); 1121#else 1122 b->gc = XCreateGC( v->display, window, 0, NULL ); 1123#endif 1124 XMesaSetFunction( v->display, b->gc, GXcopy ); 1125 1126 /* cleargc - for glClear() */ 1127#ifdef XFree86Server 1128 b->cleargc = CreateScratchGC(v->display, window->depth); 1129#else 1130 b->cleargc = XCreateGC( v->display, window, 0, NULL ); 1131#endif 1132 XMesaSetFunction( v->display, b->cleargc, GXcopy ); 1133 1134 /* 1135 * Don't generate Graphics Expose/NoExpose events in swapbuffers(). 1136 * Patch contributed by Michael Pichler May 15, 1995. 1137 */ 1138#ifdef XFree86Server 1139 b->swapgc = CreateScratchGC(v->display, window->depth); 1140 { 1141 CARD32 v[1]; 1142 v[0] = FALSE; 1143 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL); 1144 } 1145#else 1146 { 1147 XGCValues gcvalues; 1148 gcvalues.graphics_exposures = False; 1149 b->swapgc = XCreateGC(v->display, window, 1150 GCGraphicsExposures, &gcvalues); 1151 } 1152#endif 1153 XMesaSetFunction( v->display, b->swapgc, GXcopy ); 1154 /* 1155 * Set fill style and tile pixmap once for all for HPCR stuff 1156 * (instead of doing it each time in clear_color_HPCR_pixmap()) 1157 * Initialize whole stuff 1158 * Patch contributed by Jacques Leroy March 8, 1998. 1159 */ 1160 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) { 1161 int i; 1162 for (i = 0; i < 16; i++) { 1163 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0); 1164 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0); 1165 } 1166 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap, 1167 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2); 1168 XMesaSetFillStyle( v->display, b->cleargc, FillTiled); 1169 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap ); 1170 } 1171 1172 /* Initialize the row buffer XImage for use in write_color_span() */ 1173#ifdef XFree86Server 1174 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, 1175 (char *)MALLOC(MAX_WIDTH*4)); 1176#else 1177 b->rowimage = XCreateImage( v->display, 1178 v->visinfo->visual, 1179 v->visinfo->depth, 1180 ZPixmap, 0, /*format, offset*/ 1181 (char*) MALLOC(MAX_WIDTH*4), /*data*/ 1182 MAX_WIDTH, 1, /*width, height*/ 1183 32, /*bitmap_pad*/ 1184 0 /*bytes_per_line*/ ); 1185#endif 1186 if (!b->rowimage) 1187 return GL_FALSE; 1188 } 1189 1190 return GL_TRUE; 1191} 1192 1193 1194 1195/* 1196 * Convert an RGBA color to a pixel value. 1197 */ 1198unsigned long 1199xmesa_color_to_pixel(GLcontext *ctx, 1200 GLubyte r, GLubyte g, GLubyte b, GLubyte a, 1201 GLuint pixelFormat) 1202{ 1203 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1204 switch (pixelFormat) { 1205 case PF_Index: 1206 return 0; 1207 case PF_Truecolor: 1208 { 1209 unsigned long p; 1210 PACK_TRUECOLOR( p, r, g, b ); 1211 return p; 1212 } 1213 case PF_8A8B8G8R: 1214 return PACK_8A8B8G8R( r, g, b, a ); 1215 case PF_8A8R8G8B: 1216 return PACK_8A8R8G8B( r, g, b, a ); 1217 case PF_8R8G8B: 1218 /* fall through */ 1219 case PF_8R8G8B24: 1220 return PACK_8R8G8B( r, g, b ); 1221 case PF_5R6G5B: 1222 return PACK_5R6G5B( r, g, b ); 1223 case PF_Dither: 1224 { 1225 DITHER_SETUP; 1226 return DITHER( 1, 0, r, g, b ); 1227 } 1228 case PF_1Bit: 1229 /* 382 = (3*255)/2 */ 1230 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 1231 case PF_HPCR: 1232 return DITHER_HPCR(1, 1, r, g, b); 1233 case PF_Lookup: 1234 { 1235 LOOKUP_SETUP; 1236 return LOOKUP( r, g, b ); 1237 } 1238 case PF_Grayscale: 1239 return GRAY_RGB( r, g, b ); 1240 case PF_Dither_True: 1241 /* fall through */ 1242 case PF_Dither_5R6G5B: 1243 { 1244 unsigned long p; 1245 PACK_TRUEDITHER(p, 1, 0, r, g, b); 1246 return p; 1247 } 1248 default: 1249 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel"); 1250 } 1251 return 0; 1252} 1253 1254 1255#define NUM_VISUAL_TYPES 6 1256 1257/** 1258 * Convert an X visual type to a GLX visual type. 1259 * 1260 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.) 1261 * to be converted. 1262 * \return If \c visualType is a valid X visual type, a GLX visual type will 1263 * be returned. Otherwise \c GLX_NONE will be returned. 1264 * 1265 * \note 1266 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the 1267 * DRI CVS tree. 1268 */ 1269static GLint 1270xmesa_convert_from_x_visual_type( int visualType ) 1271{ 1272 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = { 1273 GLX_STATIC_GRAY, GLX_GRAY_SCALE, 1274 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR, 1275 GLX_TRUE_COLOR, GLX_DIRECT_COLOR 1276 }; 1277 1278 return ( (unsigned) visualType < NUM_VISUAL_TYPES ) 1279 ? glx_visual_types[ visualType ] : GLX_NONE; 1280} 1281 1282 1283/**********************************************************************/ 1284/***** Public Functions *****/ 1285/**********************************************************************/ 1286 1287 1288/* 1289 * Create a new X/Mesa visual. 1290 * Input: display - X11 display 1291 * visinfo - an XVisualInfo pointer 1292 * rgb_flag - GL_TRUE = RGB mode, 1293 * GL_FALSE = color index mode 1294 * alpha_flag - alpha buffer requested? 1295 * db_flag - GL_TRUE = double-buffered, 1296 * GL_FALSE = single buffered 1297 * stereo_flag - stereo visual? 1298 * ximage_flag - GL_TRUE = use an XImage for back buffer, 1299 * GL_FALSE = use an off-screen pixmap for back buffer 1300 * depth_size - requested bits/depth values, or zero 1301 * stencil_size - requested bits/stencil values, or zero 1302 * accum_red_size - requested bits/red accum values, or zero 1303 * accum_green_size - requested bits/green accum values, or zero 1304 * accum_blue_size - requested bits/blue accum values, or zero 1305 * accum_alpha_size - requested bits/alpha accum values, or zero 1306 * num_samples - number of samples/pixel if multisampling, or zero 1307 * level - visual level, usually 0 1308 * visualCaveat - ala the GLX extension, usually GLX_NONE 1309 * Return; a new XMesaVisual or 0 if error. 1310 */ 1311PUBLIC 1312XMesaVisual XMesaCreateVisual( XMesaDisplay *display, 1313 XMesaVisualInfo visinfo, 1314 GLboolean rgb_flag, 1315 GLboolean alpha_flag, 1316 GLboolean db_flag, 1317 GLboolean stereo_flag, 1318 GLboolean ximage_flag, 1319 GLint depth_size, 1320 GLint stencil_size, 1321 GLint accum_red_size, 1322 GLint accum_green_size, 1323 GLint accum_blue_size, 1324 GLint accum_alpha_size, 1325 GLint num_samples, 1326 GLint level, 1327 GLint visualCaveat ) 1328{ 1329 char *gamma; 1330 XMesaVisual v; 1331 GLint red_bits, green_bits, blue_bits, alpha_bits; 1332 1333#ifndef XFree86Server 1334 /* For debugging only */ 1335 if (_mesa_getenv("MESA_XSYNC")) { 1336 /* This makes debugging X easier. 1337 * In your debugger, set a breakpoint on _XError to stop when an 1338 * X protocol error is generated. 1339 */ 1340 XSynchronize( display, 1 ); 1341 } 1342#endif 1343 1344 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual); 1345 if (!v) { 1346 return NULL; 1347 } 1348 1349 v->display = display; 1350 1351 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free() 1352 * the struct but we may need some of the information contained in it 1353 * at a later time. 1354 */ 1355#ifndef XFree86Server 1356 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo)); 1357 if(!v->visinfo) { 1358 _mesa_free(v); 1359 return NULL; 1360 } 1361 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo)); 1362#endif 1363 1364 /* check for MESA_GAMMA environment variable */ 1365 gamma = _mesa_getenv("MESA_GAMMA"); 1366 if (gamma) { 1367 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0; 1368 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma ); 1369 if (v->RedGamma<=0.0) v->RedGamma = 1.0; 1370 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma; 1371 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma; 1372 } 1373 else { 1374 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0; 1375 } 1376 1377 v->ximage_flag = ximage_flag; 1378 1379#ifdef XFree86Server 1380 /* We could calculate these values by ourselves. nplanes is either the sum 1381 * of the red, green, and blue bits or the number index bits. 1382 * ColormapEntries is either (1U << index_bits) or 1383 * (1U << max(redBits, greenBits, blueBits)). 1384 */ 1385 assert(visinfo->nplanes > 0); 1386 v->nplanes = visinfo->nplanes; 1387 v->ColormapEntries = visinfo->ColormapEntries; 1388 1389 v->mesa_visual.redMask = visinfo->redMask; 1390 v->mesa_visual.greenMask = visinfo->greenMask; 1391 v->mesa_visual.blueMask = visinfo->blueMask; 1392 v->mesa_visual.visualID = visinfo->vid; 1393 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */ 1394#else 1395 v->mesa_visual.redMask = visinfo->red_mask; 1396 v->mesa_visual.greenMask = visinfo->green_mask; 1397 v->mesa_visual.blueMask = visinfo->blue_mask; 1398 v->mesa_visual.visualID = visinfo->visualid; 1399 v->mesa_visual.screen = visinfo->screen; 1400#endif 1401 1402#if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus)) 1403 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class); 1404#else 1405 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class); 1406#endif 1407 1408 v->mesa_visual.visualRating = visualCaveat; 1409 1410 if (alpha_flag) 1411 v->mesa_visual.alphaBits = 8; 1412 1413 (void) initialize_visual_and_buffer( 0, v, NULL, rgb_flag, 0, 0 ); 1414 1415 { 1416 const int xclass = v->mesa_visual.visualType; 1417 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) { 1418 red_bits = _mesa_bitcount(GET_REDMASK(v)); 1419 green_bits = _mesa_bitcount(GET_GREENMASK(v)); 1420 blue_bits = _mesa_bitcount(GET_BLUEMASK(v)); 1421 } 1422 else { 1423 /* this is an approximation */ 1424 int depth; 1425 depth = GET_VISUAL_DEPTH(v); 1426 red_bits = depth / 3; 1427 depth -= red_bits; 1428 green_bits = depth / 2; 1429 depth -= green_bits; 1430 blue_bits = depth; 1431 alpha_bits = 0; 1432 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) ); 1433 } 1434 alpha_bits = v->mesa_visual.alphaBits; 1435 } 1436 1437 _mesa_initialize_visual( &v->mesa_visual, 1438 rgb_flag, db_flag, stereo_flag, 1439 red_bits, green_bits, 1440 blue_bits, alpha_bits, 1441 v->mesa_visual.indexBits, 1442 depth_size, 1443 stencil_size, 1444 accum_red_size, accum_green_size, 1445 accum_blue_size, accum_alpha_size, 1446 0 ); 1447 1448 /* XXX minor hack */ 1449 v->mesa_visual.level = level; 1450 return v; 1451} 1452 1453 1454PUBLIC 1455void XMesaDestroyVisual( XMesaVisual v ) 1456{ 1457#ifndef XFree86Server 1458 _mesa_free(v->visinfo); 1459#endif 1460 _mesa_free(v); 1461} 1462 1463 1464 1465/** 1466 * Create a new XMesaContext. 1467 * \param v the XMesaVisual 1468 * \param share_list another XMesaContext with which to share display 1469 * lists or NULL if no sharing is wanted. 1470 * \return an XMesaContext or NULL if error. 1471 */ 1472PUBLIC 1473XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) 1474{ 1475 static GLboolean firstTime = GL_TRUE; 1476 XMesaContext c; 1477 GLcontext *mesaCtx; 1478 struct dd_function_table functions; 1479 TNLcontext *tnl; 1480 1481 if (firstTime) { 1482 _glthread_INIT_MUTEX(_xmesa_lock); 1483 firstTime = GL_FALSE; 1484 } 1485 1486 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */ 1487 c = (XMesaContext) CALLOC_STRUCT(xmesa_context); 1488 if (!c) 1489 return NULL; 1490 1491 mesaCtx = &(c->mesa); 1492 1493 /* initialize with default driver functions, then plug in XMesa funcs */ 1494 _mesa_init_driver_functions(&functions); 1495 xmesa_init_driver_functions(v, &functions); 1496 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual, 1497 share_list ? &(share_list->mesa) : (GLcontext *) NULL, 1498 &functions, (void *) c)) { 1499 _mesa_free(c); 1500 return NULL; 1501 } 1502 1503 _mesa_enable_sw_extensions(mesaCtx); 1504 _mesa_enable_1_3_extensions(mesaCtx); 1505 _mesa_enable_1_4_extensions(mesaCtx); 1506 _mesa_enable_1_5_extensions(mesaCtx); 1507 _mesa_enable_2_0_extensions(mesaCtx); 1508#if ENABLE_EXT_texure_compression_s3tc 1509 if (c->Mesa_DXTn) { 1510 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc"); 1511 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc"); 1512 } 1513 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1"); 1514#endif 1515#if ENABLE_EXT_timer_query 1516 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query"); 1517#endif 1518 1519#ifdef XFree86Server 1520 /* If we're running in the X server, do bounds checking to prevent 1521 * segfaults and server crashes! 1522 */ 1523 mesaCtx->Const.CheckArrayBounds = GL_TRUE; 1524#endif 1525 1526 /* finish up xmesa context initializations */ 1527 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE; 1528 c->xm_visual = v; 1529 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ 1530 c->display = v->display; 1531 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */ 1532 1533 /* Initialize the software rasterizer and helper modules. 1534 */ 1535 if (!_swrast_CreateContext( mesaCtx ) || 1536 !_vbo_CreateContext( mesaCtx ) || 1537 !_tnl_CreateContext( mesaCtx ) || 1538 !_swsetup_CreateContext( mesaCtx )) { 1539 _mesa_free_context_data(&c->mesa); 1540 _mesa_free(c); 1541 return NULL; 1542 } 1543 1544 /* tnl setup */ 1545 tnl = TNL_CONTEXT(mesaCtx); 1546 tnl->Driver.RunPipeline = _tnl_run_pipeline; 1547 /* swrast setup */ 1548 xmesa_register_swrast_functions( mesaCtx ); 1549 _swsetup_Wakeup(mesaCtx); 1550 1551 return c; 1552} 1553 1554 1555 1556PUBLIC 1557void XMesaDestroyContext( XMesaContext c ) 1558{ 1559 GLcontext *mesaCtx = &c->mesa; 1560#ifdef FX 1561 XMesaBuffer xmbuf = XMESA_BUFFER(mesaCtx->DrawBuffer); 1562 1563 if (xmbuf && xmbuf->FXctx) 1564 fxMesaDestroyContext(xmbuf->FXctx); 1565#endif 1566 _swsetup_DestroyContext( mesaCtx ); 1567 _swrast_DestroyContext( mesaCtx ); 1568 _tnl_DestroyContext( mesaCtx ); 1569 _vbo_DestroyContext( mesaCtx ); 1570 _mesa_free_context_data( mesaCtx ); 1571 _mesa_free( c ); 1572} 1573 1574 1575 1576/** 1577 * Private function for creating an XMesaBuffer which corresponds to an 1578 * X window or pixmap. 1579 * \param v the window's XMesaVisual 1580 * \param w the window we're wrapping 1581 * \return new XMesaBuffer or NULL if error 1582 */ 1583PUBLIC XMesaBuffer 1584XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w) 1585{ 1586#ifndef XFree86Server 1587 XWindowAttributes attr; 1588#endif 1589 int client = 0; 1590 XMesaBuffer b; 1591 XMesaColormap cmap; 1592 1593 assert(v); 1594 assert(w); 1595 1596 /* Check that window depth matches visual depth */ 1597#ifdef XFree86Server 1598 client = CLIENT_ID(((XMesaDrawable)w)->id); 1599 1600 if (GET_VISUAL_DEPTH(v) != ((XMesaDrawable)w)->depth) { 1601 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1602 GET_VISUAL_DEPTH(v), ((XMesaDrawable) w)->depth); 1603 return NULL; 1604 } 1605#else 1606 XGetWindowAttributes( v->display, w, &attr ); 1607 1608 if (GET_VISUAL_DEPTH(v) != attr.depth) { 1609 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n", 1610 GET_VISUAL_DEPTH(v), attr.depth); 1611 return NULL; 1612 } 1613#endif 1614 1615 /* Find colormap */ 1616#ifdef XFree86Server 1617 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP); 1618#else 1619 if (attr.colormap) { 1620 cmap = attr.colormap; 1621 } 1622 else { 1623 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w); 1624 /* this is weird, a window w/out a colormap!? */ 1625 /* OK, let's just allocate a new one and hope for the best */ 1626 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone); 1627 } 1628#endif 1629 1630 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap); 1631 if (!b) 1632 return NULL; 1633 1634 if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode, 1635 (XMesaDrawable) w, cmap )) { 1636 xmesa_free_buffer(b); 1637 return NULL; 1638 } 1639 1640 return b; 1641} 1642 1643#ifdef FX 1644void 1645FXcreateContext(XMesaVisual v, XMesaWindow w, XMesaContext c, XMesaBuffer b) 1646{ 1647 char *fxEnvVar = _mesa_getenv("MESA_GLX_FX"); 1648 if (fxEnvVar) { 1649 if (fxEnvVar[0]!='d') { 1650 int attribs[100]; 1651 int numAttribs = 0; 1652 int hw; 1653 if (v->mesa_visual.depthBits > 0) { 1654 attribs[numAttribs++] = FXMESA_DEPTH_SIZE; 1655 attribs[numAttribs++] = v->mesa_visual.depthBits; 1656 } 1657 if (v->mesa_visual.doubleBufferMode) { 1658 attribs[numAttribs++] = FXMESA_DOUBLEBUFFER; 1659 } 1660 if (v->mesa_visual.accumRedBits > 0) { 1661 attribs[numAttribs++] = FXMESA_ACCUM_SIZE; 1662 attribs[numAttribs++] = v->mesa_visual.accumRedBits; 1663 } 1664 if (v->mesa_visual.stencilBits > 0) { 1665 attribs[numAttribs++] = FXMESA_STENCIL_SIZE; 1666 attribs[numAttribs++] = v->mesa_visual.stencilBits; 1667 } 1668 if (v->mesa_visual.alphaBits > 0) { 1669 attribs[numAttribs++] = FXMESA_ALPHA_SIZE; 1670 attribs[numAttribs++] = v->mesa_visual.alphaBits; 1671 } 1672 if (1) { 1673 attribs[numAttribs++] = FXMESA_SHARE_CONTEXT; 1674 attribs[numAttribs++] = (int) &(c->mesa); 1675 } 1676 attribs[numAttribs++] = FXMESA_NONE; 1677 1678 /* [dBorca] we should take an envvar for `fxMesaSelectCurrentBoard'!!! */ 1679 hw = fxMesaSelectCurrentBoard(0); 1680 1681 /* if these fail, there's a new bug somewhere */ 1682 ASSERT(b->mesa_buffer.Width > 0); 1683 ASSERT(b->mesa_buffer.Height > 0); 1684 1685 if ((hw == GR_SSTTYPE_VOODOO) || (hw == GR_SSTTYPE_Voodoo2)) { 1686 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1687 b->mesa_buffer.Height, attribs); 1688 if ((v->undithered_pf!=PF_Index) && (b->backxrb->ximage)) { 1689 b->FXisHackUsable = b->FXctx ? GL_TRUE : GL_FALSE; 1690 if (b->FXctx && (fxEnvVar[0]=='w' || fxEnvVar[0]=='W')) { 1691 b->FXwindowHack = GL_TRUE; 1692 FX_grSstControl(GR_CONTROL_DEACTIVATE); 1693 } 1694 else { 1695 b->FXwindowHack = GL_FALSE; 1696 } 1697 } 1698 } 1699 else { 1700 if (fxEnvVar[0]=='w' || fxEnvVar[0]=='W') 1701 b->FXctx = fxMesaCreateContext(w, GR_RESOLUTION_NONE, 1702 GR_REFRESH_75Hz, attribs); 1703 else 1704 b->FXctx = fxMesaCreateBestContext(0, b->mesa_buffer.Width, 1705 b->mesa_buffer.Height, attribs); 1706 b->FXisHackUsable = GL_FALSE; 1707 b->FXwindowHack = GL_FALSE; 1708 } 1709 /* 1710 fprintf(stderr, 1711 "voodoo %d, wid %d height %d hack: usable %d active %d\n", 1712 hw, b->mesa_buffer.Width, b->mesa_buffer.Height, 1713 b->FXisHackUsable, b->FXwindowHack); 1714 */ 1715 } 1716 } 1717 else { 1718 _mesa_warning(NULL, "WARNING: This Mesa Library includes the Glide driver but\n"); 1719 _mesa_warning(NULL, " you have not defined the MESA_GLX_FX env. var.\n"); 1720 _mesa_warning(NULL, " (check the README.3DFX file for more information).\n\n"); 1721 _mesa_warning(NULL, " you can disable this message with a 'export MESA_GLX_FX=disable'.\n"); 1722 } 1723} 1724#endif 1725 1726 1727/** 1728 * Create a new XMesaBuffer from an X pixmap. 1729 * 1730 * \param v the XMesaVisual 1731 * \param p the pixmap 1732 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or 1733 * \c GLX_DIRECT_COLOR visual for the pixmap 1734 * \returns new XMesaBuffer or NULL if error 1735 */ 1736PUBLIC XMesaBuffer 1737XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap) 1738{ 1739 int client = 0; 1740 XMesaBuffer b; 1741 1742 assert(v); 1743 1744 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap); 1745 if (!b) 1746 return NULL; 1747 1748#ifdef XFree86Server 1749 client = CLIENT_ID(((XMesaDrawable)p)->id); 1750#endif 1751 1752 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1753 (XMesaDrawable) p, cmap)) { 1754 xmesa_free_buffer(b); 1755 return NULL; 1756 } 1757 1758 return b; 1759} 1760 1761 1762 1763XMesaBuffer 1764XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap, 1765 unsigned int width, unsigned int height) 1766{ 1767#ifdef XFree86Server 1768 return 0; 1769#else 1770 int client = 0; 1771 XMesaWindow root; 1772 XMesaDrawable drawable; /* X Pixmap Drawable */ 1773 XMesaBuffer b; 1774 1775 /* allocate pixmap for front buffer */ 1776 root = RootWindow( v->display, v->visinfo->screen ); 1777 drawable = XCreatePixmap(v->display, root, width, height, 1778 v->visinfo->depth); 1779 if (!drawable) 1780 return NULL; 1781 1782 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap); 1783 if (!b) 1784 return NULL; 1785 1786 if (!initialize_visual_and_buffer(client, v, b, v->mesa_visual.rgbMode, 1787 drawable, cmap)) { 1788 xmesa_free_buffer(b); 1789 return NULL; 1790 } 1791 1792 return b; 1793#endif 1794} 1795 1796 1797 1798/* 1799 * Deallocate an XMesaBuffer structure and all related info. 1800 */ 1801PUBLIC void 1802XMesaDestroyBuffer(XMesaBuffer b) 1803{ 1804 xmesa_free_buffer(b); 1805} 1806 1807 1808/** 1809 * Query the current window size and update the corresponding GLframebuffer 1810 * and all attached renderbuffers. 1811 * Called when: 1812 * 1. the first time a buffer is bound to a context. 1813 * 2. from glViewport to poll for window size changes 1814 * 3. from the XMesaResizeBuffers() API function. 1815 * Note: it's possible (and legal) for xmctx to be NULL. That can happen 1816 * when resizing a buffer when no rendering context is bound. 1817 */ 1818void 1819xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer) 1820{ 1821 GLuint width, height; 1822 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height); 1823 if (drawBuffer->mesa_buffer.Width != width || 1824 drawBuffer->mesa_buffer.Height != height) { 1825 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL; 1826 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height); 1827 } 1828 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */ 1829} 1830 1831 1832/* 1833 * Bind buffer b to context c and make c the current rendering context. 1834 */ 1835GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b ) 1836{ 1837 return XMesaMakeCurrent2( c, b, b ); 1838} 1839 1840 1841/* 1842 * Bind buffer b to context c and make c the current rendering context. 1843 */ 1844PUBLIC 1845GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer, 1846 XMesaBuffer readBuffer ) 1847{ 1848 if (c) { 1849 if (!drawBuffer || !readBuffer) 1850 return GL_FALSE; /* must specify buffers! */ 1851 1852#ifdef FX 1853 if (drawBuffer->FXctx) { 1854 fxMesaMakeCurrent(drawBuffer->FXctx); 1855 1856 c->xm_buffer = drawBuffer; 1857 1858 return GL_TRUE; 1859 } 1860#endif 1861 if (&(c->mesa) == _mesa_get_current_context() 1862 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer 1863 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer 1864 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) { 1865 /* same context and buffer, do nothing */ 1866 return GL_TRUE; 1867 } 1868 1869 c->xm_buffer = drawBuffer; 1870 1871 /* Call this periodically to detect when the user has begun using 1872 * GL rendering from multiple threads. 1873 */ 1874 _glapi_check_multithread(); 1875 1876 xmesa_check_and_update_buffer_size(c, drawBuffer); 1877 if (readBuffer != drawBuffer) 1878 xmesa_check_and_update_buffer_size(c, readBuffer); 1879 1880 _mesa_make_current(&(c->mesa), 1881 &drawBuffer->mesa_buffer, 1882 &readBuffer->mesa_buffer); 1883 1884 if (c->xm_visual->mesa_visual.rgbMode) { 1885 /* 1886 * Must recompute and set these pixel values because colormap 1887 * can be different for different windows. 1888 */ 1889 c->clearpixel = xmesa_color_to_pixel( &c->mesa, 1890 c->clearcolor[0], 1891 c->clearcolor[1], 1892 c->clearcolor[2], 1893 c->clearcolor[3], 1894 c->xm_visual->undithered_pf); 1895 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel); 1896 } 1897 1898 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */ 1899 drawBuffer->wasCurrent = GL_TRUE; 1900 } 1901 else { 1902 /* Detach */ 1903 _mesa_make_current( NULL, NULL, NULL ); 1904 } 1905 return GL_TRUE; 1906} 1907 1908 1909/* 1910 * Unbind the context c from its buffer. 1911 */ 1912GLboolean XMesaUnbindContext( XMesaContext c ) 1913{ 1914 /* A no-op for XFree86 integration purposes */ 1915 return GL_TRUE; 1916} 1917 1918 1919XMesaContext XMesaGetCurrentContext( void ) 1920{ 1921 GET_CURRENT_CONTEXT(ctx); 1922 if (ctx) { 1923 XMesaContext xmesa = XMESA_CONTEXT(ctx); 1924 return xmesa; 1925 } 1926 else { 1927 return 0; 1928 } 1929} 1930 1931 1932XMesaBuffer XMesaGetCurrentBuffer( void ) 1933{ 1934 GET_CURRENT_CONTEXT(ctx); 1935 if (ctx) { 1936 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 1937 return xmbuf; 1938 } 1939 else { 1940 return 0; 1941 } 1942} 1943 1944 1945/* New in Mesa 3.1 */ 1946XMesaBuffer XMesaGetCurrentReadBuffer( void ) 1947{ 1948 GET_CURRENT_CONTEXT(ctx); 1949 if (ctx) { 1950 return XMESA_BUFFER(ctx->ReadBuffer); 1951 } 1952 else { 1953 return 0; 1954 } 1955} 1956 1957 1958#ifdef XFree86Server 1959PUBLIC 1960GLboolean XMesaForceCurrent(XMesaContext c) 1961{ 1962 if (c) { 1963#ifdef XGLServer 1964 _glapi_set_dispatch(c->mesa.CurrentDispatch); 1965#endif 1966 1967 if (&(c->mesa) != _mesa_get_current_context()) { 1968 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer); 1969 } 1970 } 1971 else { 1972 _mesa_make_current(NULL, NULL, NULL); 1973 } 1974 return GL_TRUE; 1975} 1976 1977 1978PUBLIC 1979GLboolean XMesaLoseCurrent(XMesaContext c) 1980{ 1981 (void) c; 1982 _mesa_make_current(NULL, NULL, NULL); 1983 return GL_TRUE; 1984} 1985 1986 1987PUBLIC 1988GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask ) 1989{ 1990 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask); 1991 return GL_TRUE; 1992} 1993#endif /* XFree86Server */ 1994 1995 1996/* 1997 * Switch 3Dfx support hack between window and full-screen mode. 1998 */ 1999#ifdef FX 2000GLboolean XMesaSetFXmode( GLint mode ) 2001{ 2002 const char *fx = _mesa_getenv("MESA_GLX_FX"); 2003 if (fx && fx[0] != 'd') { 2004 GET_CURRENT_CONTEXT(ctx); 2005 GrHwConfiguration hw; 2006 if (!FX_grSstQueryHardware(&hw)) { 2007 /*fprintf(stderr, "!grSstQueryHardware\n");*/ 2008 return GL_FALSE; 2009 } 2010 if (hw.num_sst < 1) { 2011 /*fprintf(stderr, "hw.num_sst < 1\n");*/ 2012 return GL_FALSE; 2013 } 2014 if (ctx) { 2015 /* [dBorca] Hack alert: 2016 * oh, this is sooo wrong: ctx above is 2017 * really an fxMesaContext, not an XMesaContext 2018 */ 2019 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer); 2020 if (mode == XMESA_FX_WINDOW) { 2021 if (xmbuf->FXisHackUsable) { 2022 FX_grSstControl(GR_CONTROL_DEACTIVATE); 2023 xmbuf->FXwindowHack = GL_TRUE; 2024 return GL_TRUE; 2025 } 2026 } 2027 else if (mode == XMESA_FX_FULLSCREEN) { 2028 FX_grSstControl(GR_CONTROL_ACTIVATE); 2029 xmbuf->FXwindowHack = GL_FALSE; 2030 return GL_TRUE; 2031 } 2032 else { 2033 /* Error: Bad mode value */ 2034 } 2035 } 2036 } 2037 /*fprintf(stderr, "fallthrough\n");*/ 2038 return GL_FALSE; 2039} 2040#else 2041GLboolean XMesaSetFXmode( GLint mode ) 2042{ 2043 (void) mode; 2044 return GL_FALSE; 2045} 2046#endif 2047 2048 2049 2050#ifdef FX 2051/* 2052 * Read image from VooDoo frame buffer into X/Mesa's back XImage. 2053 */ 2054static void FXgetImage( XMesaBuffer b ) 2055{ 2056 GET_CURRENT_CONTEXT(ctx); 2057 static unsigned short pixbuf[MAX_WIDTH]; 2058 GLuint x, y; 2059 GLuint width, height; 2060 XMesaContext xmesa = XMESA_CONTEXT(ctx); 2061 2062#ifdef XFree86Server 2063 x = b->frontxrb->pixmap->x; 2064 y = b->frontxrb->pixmap->y; 2065 width = b->frontxrb->pixmap->width; 2066 height = b->frontxrb->pixmap->height; 2067 depth = b->frontxrb->pixmap->depth; 2068#else 2069 xmesa_get_window_size(b->display, b, &width, &height); 2070 x = y = 0; 2071#endif 2072 if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) { 2073 b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width); 2074 b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height); 2075 if (b->mesa_buffer.Width & 1) 2076 b->mesa_buffer.Width--; /* prevent odd width */ 2077 } 2078 2079 /* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */ 2080 /* grLfbWriteColorFormat(GR_COLORFORMAT_ARGB); */ 2081 if (b->xm_visual->undithered_pf==PF_5R6G5B) { 2082 /* Special case: 16bpp RGB */ 2083 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, /* src buffer */ 2084 0, b->FXctx->height - b->mesa_buffer.Height, /*pos*/ 2085 b->mesa_buffer.Width, b->mesa_buffer.Height, /* size */ 2086 b->mesa_buffer.Width * sizeof(GLushort), /* stride */ 2087 b->backxrb->ximage->data); /* dest buffer */ 2088 } 2089 else if (b->xm_visual->dithered_pf==PF_Dither 2090 && GET_VISUAL_DEPTH(b->xm_visual)==8) { 2091 /* Special case: 8bpp RGB */ 2092 for (y=0;y<b->mesa_buffer.Height;y++) { 2093 GLubyte *ptr = (GLubyte*) b->backxrb->ximage->data 2094 + b->backxrb->ximage->bytes_per_line * y; 2095 XDITHER_SETUP(y); 2096 2097 /* read row from 3Dfx frame buffer */ 2098 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2099 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2100 b->mesa_buffer.Width, 1, 2101 0, 2102 pixbuf ); 2103 2104 /* write to XImage back buffer */ 2105 for (x=0;x<b->mesa_buffer.Width;x++) { 2106 GLubyte r = (pixbuf[x] & 0xf800) >> 8; 2107 GLubyte g = (pixbuf[x] & 0x07e0) >> 3; 2108 GLubyte b = (pixbuf[x] & 0x001f) << 3; 2109 *ptr++ = XDITHER( x, r, g, b); 2110 } 2111 } 2112 } 2113 else { 2114 /* General case: slow! */ 2115 for (y=0;y<b->mesa_buffer.Height;y++) { 2116 /* read row from 3Dfx frame buffer */ 2117 grLfbReadRegion( GR_BUFFER_FRONTBUFFER, 2118 0, b->FXctx->height-(b->mesa_buffer.Height-y), 2119 b->mesa_buffer.Width, 1, 2120 0, 2121 pixbuf ); 2122 2123 /* write to XImage back buffer */ 2124 for (x=0;x<b->mesa_buffer.Width;x++) { 2125 XMesaPutPixel(b->backxrb->ximage,x,y, 2126 xmesa_color_to_pixel(ctx, 2127 (pixbuf[x] & 0xf800) >> 8, 2128 (pixbuf[x] & 0x07e0) >> 3, 2129 (pixbuf[x] & 0x001f) << 3, 2130 0xff, 2131 b->xm_visual->undithered_pf)); 2132 } 2133 } 2134 } 2135 /* grLfbWriteColorFormat(GR_COLORFORMAT_ABGR); */ 2136} 2137#endif 2138 2139 2140/* 2141 * Copy the back buffer to the front buffer. If there's no back buffer 2142 * this is a no-op. 2143 */ 2144PUBLIC 2145void XMesaSwapBuffers( XMesaBuffer b ) 2146{ 2147 GET_CURRENT_CONTEXT(ctx); 2148 2149 if (!b->backxrb) { 2150 /* single buffered */ 2151 return; 2152 } 2153 2154 /* If we're swapping the buffer associated with the current context 2155 * we have to flush any pending rendering commands first. 2156 */ 2157 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2158 _mesa_notifySwapBuffers(ctx); 2159 2160 if (b->db_mode) { 2161#ifdef FX 2162 if (b->FXctx) { 2163 fxMesaSwapBuffers(); 2164 2165 if (b->FXwindowHack) 2166 FXgetImage(b); 2167 else 2168 return; 2169 } 2170#endif 2171 if (b->backxrb->ximage) { 2172 /* Copy Ximage (back buf) from client memory to server window */ 2173#if defined(USE_XSHM) && !defined(XFree86Server) 2174 if (b->shm) { 2175 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2176 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2177 b->swapgc, 2178 b->backxrb->ximage, 0, 0, 2179 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2180 False ); 2181 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2182 } 2183 else 2184#endif 2185 { 2186 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2187 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2188 b->swapgc, 2189 b->backxrb->ximage, 0, 0, 2190 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height ); 2191 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2192 } 2193 } 2194 else if (b->backxrb->pixmap) { 2195 /* Copy pixmap (back buf) to window (front buf) on server */ 2196 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/ 2197 XMesaCopyArea( b->xm_visual->display, 2198 b->backxrb->pixmap, /* source drawable */ 2199 b->frontxrb->drawable, /* dest. drawable */ 2200 b->swapgc, 2201 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height, 2202 0, 0 /* dest region */ 2203 ); 2204 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ 2205 } 2206 2207 if (b->swAlpha) 2208 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); 2209 } 2210#if !defined(XFree86Server) 2211 XSync( b->xm_visual->display, False ); 2212#endif 2213} 2214 2215 2216 2217/* 2218 * Copy sub-region of back buffer to front buffer 2219 */ 2220void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height ) 2221{ 2222 GET_CURRENT_CONTEXT(ctx); 2223 2224 /* If we're swapping the buffer associated with the current context 2225 * we have to flush any pending rendering commands first. 2226 */ 2227 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer)) 2228 _mesa_notifySwapBuffers(ctx); 2229 2230 if (!b->backxrb) { 2231 /* single buffered */ 2232 return; 2233 } 2234 2235 if (b->db_mode) { 2236 int yTop = b->mesa_buffer.Height - y - height; 2237#ifdef FX 2238 if (b->FXctx) { 2239 fxMesaSwapBuffers(); 2240 if (b->FXwindowHack) 2241 FXgetImage(b); 2242 else 2243 return; 2244 } 2245#endif 2246 if (b->backxrb->ximage) { 2247 /* Copy Ximage from host's memory to server's window */ 2248#if defined(USE_XSHM) && !defined(XFree86Server) 2249 if (b->shm) { 2250 /* XXX assuming width and height aren't too large! */ 2251 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable, 2252 b->swapgc, 2253 b->backxrb->ximage, x, yTop, 2254 x, yTop, width, height, False ); 2255 /* wait for finished event??? */ 2256 } 2257 else 2258#endif 2259 { 2260 /* XXX assuming width and height aren't too large! */ 2261 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable, 2262 b->swapgc, 2263 b->backxrb->ximage, x, yTop, 2264 x, yTop, width, height ); 2265 } 2266 } 2267 else { 2268 /* Copy pixmap to window on server */ 2269 XMesaCopyArea( b->xm_visual->display, 2270 b->backxrb->pixmap, /* source drawable */ 2271 b->frontxrb->drawable, /* dest. drawable */ 2272 b->swapgc, 2273 x, yTop, width, height, /* source region */ 2274 x, yTop /* dest region */ 2275 ); 2276 } 2277 } 2278} 2279 2280 2281/* 2282 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function 2283 * is a way to get "under the hood" of X/Mesa so one can manipulate the 2284 * back buffer directly. 2285 * Output: pixmap - pointer to back buffer's Pixmap, or 0 2286 * ximage - pointer to back buffer's XImage, or NULL 2287 * Return: GL_TRUE = context is double buffered 2288 * GL_FALSE = context is single buffered 2289 */ 2290#ifndef XFree86Server 2291GLboolean XMesaGetBackBuffer( XMesaBuffer b, 2292 XMesaPixmap *pixmap, 2293 XMesaImage **ximage ) 2294{ 2295 if (b->db_mode) { 2296 if (pixmap) 2297 *pixmap = b->backxrb->pixmap; 2298 if (ximage) 2299 *ximage = b->backxrb->ximage; 2300 return GL_TRUE; 2301 } 2302 else { 2303 *pixmap = 0; 2304 *ximage = NULL; 2305 return GL_FALSE; 2306 } 2307} 2308#endif /* XFree86Server */ 2309 2310 2311/* 2312 * Return the depth buffer associated with an XMesaBuffer. 2313 * Input: b - the XMesa buffer handle 2314 * Output: width, height - size of buffer in pixels 2315 * bytesPerValue - bytes per depth value (2 or 4) 2316 * buffer - pointer to depth buffer values 2317 * Return: GL_TRUE or GL_FALSE to indicate success or failure. 2318 */ 2319GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height, 2320 GLint *bytesPerValue, void **buffer ) 2321{ 2322 struct gl_renderbuffer *rb 2323 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer; 2324 if (!rb || !rb->Data) { 2325 *width = 0; 2326 *height = 0; 2327 *bytesPerValue = 0; 2328 *buffer = 0; 2329 return GL_FALSE; 2330 } 2331 else { 2332 *width = b->mesa_buffer.Width; 2333 *height = b->mesa_buffer.Height; 2334 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16 2335 ? sizeof(GLushort) : sizeof(GLuint); 2336 *buffer = rb->Data; 2337 return GL_TRUE; 2338 } 2339} 2340 2341 2342void XMesaFlush( XMesaContext c ) 2343{ 2344 if (c && c->xm_visual) { 2345#ifdef XFree86Server 2346 /* NOT_NEEDED */ 2347#else 2348 XSync( c->xm_visual->display, False ); 2349#endif 2350 } 2351} 2352 2353 2354 2355const char *XMesaGetString( XMesaContext c, int name ) 2356{ 2357 (void) c; 2358 if (name==XMESA_VERSION) { 2359 return "5.0"; 2360 } 2361 else if (name==XMESA_EXTENSIONS) { 2362 return ""; 2363 } 2364 else { 2365 return NULL; 2366 } 2367} 2368 2369 2370 2371XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d ) 2372{ 2373 XMesaBuffer b; 2374 for (b=XMesaBufferList; b; b=b->Next) { 2375 if (b->frontxrb->drawable == d && b->display == dpy) { 2376 return b; 2377 } 2378 } 2379 return NULL; 2380} 2381 2382 2383/** 2384 * Free/destroy all XMesaBuffers associated with given display. 2385 */ 2386void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy) 2387{ 2388 XMesaBuffer b, next; 2389 for (b = XMesaBufferList; b; b = next) { 2390 next = b->Next; 2391 if (b->display == dpy) { 2392 xmesa_free_buffer(b); 2393 } 2394 } 2395} 2396 2397 2398/* 2399 * Look for XMesaBuffers whose X window has been destroyed. 2400 * Deallocate any such XMesaBuffers. 2401 */ 2402void XMesaGarbageCollect( void ) 2403{ 2404 XMesaBuffer b, next; 2405 for (b=XMesaBufferList; b; b=next) { 2406 next = b->Next; 2407 if (b->display && b->frontxrb->drawable && b->type == WINDOW) { 2408#ifdef XFree86Server 2409 /* NOT_NEEDED */ 2410#else 2411 XSync(b->display, False); 2412 if (!window_exists( b->display, b->frontxrb->drawable )) { 2413 /* found a dead window, free the ancillary info */ 2414 XMesaDestroyBuffer( b ); 2415 } 2416#endif 2417 } 2418 } 2419} 2420 2421 2422unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y, 2423 GLfloat red, GLfloat green, 2424 GLfloat blue, GLfloat alpha ) 2425{ 2426 GLcontext *ctx = &xmesa->mesa; 2427 GLint r = (GLint) (red * 255.0F); 2428 GLint g = (GLint) (green * 255.0F); 2429 GLint b = (GLint) (blue * 255.0F); 2430 GLint a = (GLint) (alpha * 255.0F); 2431 2432 switch (xmesa->pixelformat) { 2433 case PF_Index: 2434 return 0; 2435 case PF_Truecolor: 2436 { 2437 unsigned long p; 2438 PACK_TRUECOLOR( p, r, g, b ); 2439 return p; 2440 } 2441 case PF_8A8B8G8R: 2442 return PACK_8A8B8G8R( r, g, b, a ); 2443 case PF_8A8R8G8B: 2444 return PACK_8A8R8G8B( r, g, b, a ); 2445 case PF_8R8G8B: 2446 return PACK_8R8G8B( r, g, b ); 2447 case PF_5R6G5B: 2448 return PACK_5R6G5B( r, g, b ); 2449 case PF_Dither: 2450 { 2451 DITHER_SETUP; 2452 return DITHER( x, y, r, g, b ); 2453 } 2454 case PF_1Bit: 2455 /* 382 = (3*255)/2 */ 2456 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip; 2457 case PF_HPCR: 2458 return DITHER_HPCR(x, y, r, g, b); 2459 case PF_Lookup: 2460 { 2461 LOOKUP_SETUP; 2462 return LOOKUP( r, g, b ); 2463 } 2464 case PF_Grayscale: 2465 return GRAY_RGB( r, g, b ); 2466 case PF_Dither_5R6G5B: 2467 /* fall through */ 2468 case PF_Dither_True: 2469 { 2470 unsigned long p; 2471 PACK_TRUEDITHER(p, x, y, r, g, b); 2472 return p; 2473 } 2474 default: 2475 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor"); 2476 } 2477 return 0; 2478} 2479 2480 2481/* 2482 * This is typically called when the window size changes and we need 2483 * to reallocate the buffer's back/depth/stencil/accum buffers. 2484 */ 2485PUBLIC void 2486XMesaResizeBuffers( XMesaBuffer b ) 2487{ 2488 GET_CURRENT_CONTEXT(ctx); 2489 XMesaContext xmctx = XMESA_CONTEXT(ctx); 2490 if (!xmctx) 2491 return; 2492 xmesa_check_and_update_buffer_size(xmctx, b); 2493} 2494 2495